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kernel / pub / scm / linux / kernel / git / joro / linux / refs/tags/v2.5.68 / . / drivers / scsi / sym53c8xx.c
blob: 2f48457dfd4cf4e036be4d06b303392e7d817c07 [file] [log] [blame]
/******************************************************************************
** High Performance device driver for the Symbios 53C896 controller.
**
** Copyright (C) 1998-2001 Gerard Roudier <groudier@free.fr>
**
** This driver also supports all the Symbios 53C8XX controller family,
** except 53C810 revisions < 16, 53C825 revisions < 16 and all
** revisions of 53C815 controllers.
**
** This driver is based on the Linux port of the FreeBSD ncr driver.
**
** Copyright (C) 1994 Wolfgang Stanglmeier
**
**-----------------------------------------------------------------------------
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
**-----------------------------------------------------------------------------
**
** The Linux port of the FreeBSD ncr driver has been achieved in
** november 1995 by:
**
** Gerard Roudier <groudier@free.fr>
**
** Being given that this driver originates from the FreeBSD version, and
** in order to keep synergy on both, any suggested enhancements and corrections
** received on Linux are automatically a potential candidate for the FreeBSD
** version.
**
** The original driver has been written for 386bsd and FreeBSD by
** Wolfgang Stanglmeier <wolf@cologne.de>
** Stefan Esser <se@mi.Uni-Koeln.de>
**
**-----------------------------------------------------------------------------
**
** Major contributions:
** --------------------
**
** NVRAM detection and reading.
** Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
**
*******************************************************************************
*/
/*
** Supported SCSI features:
** Synchronous data transfers
** Wide16 SCSI BUS
** Disconnection/Reselection
** Tagged command queuing
** SCSI Parity checking
**
** Supported NCR/SYMBIOS chips:
** 53C810A (8 bits, Fast 10, no rom BIOS)
** 53C825A (Wide, Fast 10, on-board rom BIOS)
** 53C860 (8 bits, Fast 20, no rom BIOS)
** 53C875 (Wide, Fast 20, on-board rom BIOS)
** 53C876 (Wide, Fast 20 Dual, on-board rom BIOS)
** 53C895 (Wide, Fast 40, on-board rom BIOS)
** 53C895A (Wide, Fast 40, on-board rom BIOS)
** 53C896 (Wide, Fast 40 Dual, on-board rom BIOS)
** 53C897 (Wide, Fast 40 Dual, on-board rom BIOS)
** 53C1510D (Wide, Fast 40 Dual, on-board rom BIOS)
** 53C1010 (Wide, Fast 80 Dual, on-board rom BIOS)
** 53C1010_66(Wide, Fast 80 Dual, on-board rom BIOS, 33/66MHz PCI)
**
** Other features:
** Memory mapped IO
** Module
** Shared IRQ
*/
/*
** Name and version of the driver
*/
#define SCSI_NCR_DRIVER_NAME "sym53c8xx-1.7.3c-20010512"
#define SCSI_NCR_DEBUG_FLAGS (0)
#define NAME53C "sym53c"
#define NAME53C8XX "sym53c8xx"
/*==========================================================
**
** Include files
**
**==========================================================
*/
#define LinuxVersionCode(v, p, s) (((v)<<16)+((p)<<8)+(s))
#include <linux/module.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/system.h>
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,17)
#include <linux/spinlock.h>
#elif LINUX_VERSION_CODE >= LinuxVersionCode(2,1,93)
#include <asm/spinlock.h>
#endif
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/time.h>
#include <linux/timer.h>
#include <linux/stat.h>
#include <linux/version.h>
#include <linux/blk.h>
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,35)
#include <linux/init.h>
#endif
#ifndef __init
#define __init
#endif
#ifndef __initdata
#define __initdata
#endif
#if LINUX_VERSION_CODE <= LinuxVersionCode(2,1,92)
#include <linux/bios32.h>
#endif
#include "scsi.h"
#include "hosts.h"
#include <linux/types.h>
/*
** Define BITS_PER_LONG for earlier linux versions.
*/
#ifndef BITS_PER_LONG
#if (~0UL) == 0xffffffffUL
#define BITS_PER_LONG 32
#else
#define BITS_PER_LONG 64
#endif
#endif
/*
** Define the BSD style u_int32 and u_int64 type.
** Are in fact u_int32_t and u_int64_t :-)
*/
typedef u32 u_int32;
typedef u64 u_int64;
#include "sym53c8xx.h"
/*
** Donnot compile integrity checking code for Linux-2.3.0
** and above since SCSI data structures are not ready yet.
*/
/* #if LINUX_VERSION_CODE < LinuxVersionCode(2,3,0) */
#if 0
#define SCSI_NCR_INTEGRITY_CHECKING
#endif
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
/*
** Hmmm... What complex some PCI-HOST bridges actually are,
** despite the fact that the PCI specifications are looking
** so smart and simple! ;-)
*/
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,47)
#define SCSI_NCR_DYNAMIC_DMA_MAPPING
#endif
/*==========================================================
**
** A la VMS/CAM-3 queue management.
** Implemented from linux list management.
**
**==========================================================
*/
typedef struct xpt_quehead {
struct xpt_quehead *flink; /* Forward pointer */
struct xpt_quehead *blink; /* Backward pointer */
} XPT_QUEHEAD;
#define xpt_que_init(ptr) do { \
(ptr)->flink = (ptr); (ptr)->blink = (ptr); \
} while (0)
static inline void __xpt_que_add(struct xpt_quehead * new,
struct xpt_quehead * blink,
struct xpt_quehead * flink)
{
flink->blink = new;
new->flink = flink;
new->blink = blink;
blink->flink = new;
}
static inline void __xpt_que_del(struct xpt_quehead * blink,
struct xpt_quehead * flink)
{
flink->blink = blink;
blink->flink = flink;
}
static inline int xpt_que_empty(struct xpt_quehead *head)
{
return head->flink == head;
}
static inline void xpt_que_splice(struct xpt_quehead *list,
struct xpt_quehead *head)
{
struct xpt_quehead *first = list->flink;
if (first != list) {
struct xpt_quehead *last = list->blink;
struct xpt_quehead *at = head->flink;
first->blink = head;
head->flink = first;
last->flink = at;
at->blink = last;
}
}
#define xpt_que_entry(ptr, type, member) \
((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
#define xpt_insque(new, pos) __xpt_que_add(new, pos, (pos)->flink)
#define xpt_remque(el) __xpt_que_del((el)->blink, (el)->flink)
#define xpt_insque_head(new, head) __xpt_que_add(new, head, (head)->flink)
static inline struct xpt_quehead *xpt_remque_head(struct xpt_quehead *head)
{
struct xpt_quehead *elem = head->flink;
if (elem != head)
__xpt_que_del(head, elem->flink);
else
elem = 0;
return elem;
}
#define xpt_insque_tail(new, head) __xpt_que_add(new, (head)->blink, head)
static inline struct xpt_quehead *xpt_remque_tail(struct xpt_quehead *head)
{
struct xpt_quehead *elem = head->blink;
if (elem != head)
__xpt_que_del(elem->blink, head);
else
elem = 0;
return elem;
}
/*==========================================================
**
** Configuration and Debugging
**
**==========================================================
*/
/*
** SCSI address of this device.
** The boot routines should have set it.
** If not, use this.
*/
#ifndef SCSI_NCR_MYADDR
#define SCSI_NCR_MYADDR (7)
#endif
/*
** The maximum number of tags per logic unit.
** Used only for devices that support tags.
*/
#ifndef SCSI_NCR_MAX_TAGS
#define SCSI_NCR_MAX_TAGS (8)
#endif
/*
** TAGS are actually unlimited (256 tags/lun).
** But Linux only supports 255. :)
*/
#if SCSI_NCR_MAX_TAGS > 255
#define MAX_TAGS 255
#else
#define MAX_TAGS SCSI_NCR_MAX_TAGS
#endif
/*
** Since the ncr chips only have a 8 bit ALU, we try to be clever
** about offset calculation in the TASK TABLE per LUN that is an
** array of DWORDS = 4 bytes.
*/
#if MAX_TAGS > (512/4)
#define MAX_TASKS (1024/4)
#elif MAX_TAGS > (256/4)
#define MAX_TASKS (512/4)
#else
#define MAX_TASKS (256/4)
#endif
/*
** This one means 'NO TAG for this job'
*/
#define NO_TAG (256)
/*
** Number of targets supported by the driver.
** n permits target numbers 0..n-1.
** Default is 16, meaning targets #0..#15.
** #7 .. is myself.
*/
#ifdef SCSI_NCR_MAX_TARGET
#define MAX_TARGET (SCSI_NCR_MAX_TARGET)
#else
#define MAX_TARGET (16)
#endif
/*
** Number of logic units supported by the driver.
** n enables logic unit numbers 0..n-1.
** The common SCSI devices require only
** one lun, so take 1 as the default.
*/
#ifdef SCSI_NCR_MAX_LUN
#define MAX_LUN 64
#else
#define MAX_LUN (1)
#endif
/*
** Asynchronous pre-scaler (ns). Shall be 40 for
** the SCSI timings to be compliant.
*/
#ifndef SCSI_NCR_MIN_ASYNC
#define SCSI_NCR_MIN_ASYNC (40)
#endif
/*
** The maximum number of jobs scheduled for starting.
** We allocate 4 entries more than the value we announce
** to the SCSI upper layer. Guess why ! :-)
*/
#ifdef SCSI_NCR_CAN_QUEUE
#define MAX_START (SCSI_NCR_CAN_QUEUE + 4)
#else
#define MAX_START (MAX_TARGET + 7 * MAX_TAGS)
#endif
/*
** We donnot want to allocate more than 1 PAGE for the
** the start queue and the done queue. We hard-code entry
** size to 8 in order to let cpp do the checking.
** Allows 512-4=508 pending IOs for i386 but Linux seems for
** now not able to provide the driver with this amount of IOs.
*/
#if MAX_START > PAGE_SIZE/8
#undef MAX_START
#define MAX_START (PAGE_SIZE/8)
#endif
/*
** The maximum number of segments a transfer is split into.
** We support up to 127 segments for both read and write.
*/
#define MAX_SCATTER (SCSI_NCR_MAX_SCATTER)
#define SCR_SG_SIZE (2)
/*
** other
*/
#define NCR_SNOOP_TIMEOUT (1000000)
/*==========================================================
**
** Miscallaneous BSDish defines.
**
**==========================================================
*/
#define u_char unsigned char
#define u_short unsigned short
#define u_int unsigned int
#define u_long unsigned long
#ifndef bcopy
#define bcopy(s, d, n) memcpy((d), (s), (n))
#endif
#ifndef bzero
#define bzero(d, n) memset((d), 0, (n))
#endif
#ifndef offsetof
#define offsetof(t, m) ((size_t) (&((t *)0)->m))
#endif
/*
** Simple Wrapper to kernel PCI bus interface.
**
** This wrapper allows to get rid of old kernel PCI interface
** and still allows to preserve linux-2.0 compatibilty.
** In fact, it is mostly an incomplete emulation of the new
** PCI code for pre-2.2 kernels. When kernel-2.0 support
** will be dropped, we will just have to remove most of this
** code.
*/
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,2,0)
typedef struct pci_dev *pcidev_t;
#define PCIDEV_NULL (0)
#define PciBusNumber(d) (d)->bus->number
#define PciDeviceFn(d) (d)->devfn
#define PciVendorId(d) (d)->vendor
#define PciDeviceId(d) (d)->device
#define PciIrqLine(d) (d)->irq
static u_long __init
pci_get_base_cookie(struct pci_dev *pdev, int index)
{
u_long base;
#if LINUX_VERSION_CODE > LinuxVersionCode(2,3,12)
base = pdev->resource[index].start;
#else
base = pdev->base_address[index];
#if BITS_PER_LONG > 32
if ((base & 0x7) == 0x4)
*base |= (((u_long)pdev->base_address[++index]) << 32);
#endif
#endif
return (base & ~0x7ul);
}
static int __init
pci_get_base_address(struct pci_dev *pdev, int index, u_long *base)
{
u32 tmp;
#define PCI_BAR_OFFSET(index) (PCI_BASE_ADDRESS_0 + (index<<2))
pci_read_config_dword(pdev, PCI_BAR_OFFSET(index), &tmp);
*base = tmp;
++index;
if ((tmp & 0x7) == 0x4) {
#if BITS_PER_LONG > 32
pci_read_config_dword(pdev, PCI_BAR_OFFSET(index), &tmp);
*base |= (((u_long)tmp) << 32);
#endif
++index;
}
return index;
#undef PCI_BAR_OFFSET
}
#else /* Incomplete emulation of current PCI code for pre-2.2 kernels */
typedef unsigned int pcidev_t;
#define PCIDEV_NULL (~0u)
#define PciBusNumber(d) ((d)>>8)
#define PciDeviceFn(d) ((d)&0xff)
#define __PciDev(busn, devfn) (((busn)<<8)+(devfn))
#define pci_present pcibios_present
#define pci_read_config_byte(d, w, v) \
pcibios_read_config_byte(PciBusNumber(d), PciDeviceFn(d), w, v)
#define pci_read_config_word(d, w, v) \
pcibios_read_config_word(PciBusNumber(d), PciDeviceFn(d), w, v)
#define pci_read_config_dword(d, w, v) \
pcibios_read_config_dword(PciBusNumber(d), PciDeviceFn(d), w, v)
#define pci_write_config_byte(d, w, v) \
pcibios_write_config_byte(PciBusNumber(d), PciDeviceFn(d), w, v)
#define pci_write_config_word(d, w, v) \
pcibios_write_config_word(PciBusNumber(d), PciDeviceFn(d), w, v)
#define pci_write_config_dword(d, w, v) \
pcibios_write_config_dword(PciBusNumber(d), PciDeviceFn(d), w, v)
static pcidev_t __init
pci_find_device(unsigned int vendor, unsigned int device, pcidev_t prev)
{
static unsigned short pci_index;
int retv;
unsigned char bus_number, device_fn;
if (prev == PCIDEV_NULL)
pci_index = 0;
else
++pci_index;
retv = pcibios_find_device (vendor, device, pci_index,
&bus_number, &device_fn);
return retv ? PCIDEV_NULL : __PciDev(bus_number, device_fn);
}
static u_short __init PciVendorId(pcidev_t dev)
{
u_short vendor_id;
pci_read_config_word(dev, PCI_VENDOR_ID, &vendor_id);
return vendor_id;
}
static u_short __init PciDeviceId(pcidev_t dev)
{
u_short device_id;
pci_read_config_word(dev, PCI_DEVICE_ID, &device_id);
return device_id;
}
static u_int __init PciIrqLine(pcidev_t dev)
{
u_char irq;
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
return irq;
}
static int __init
pci_get_base_address(pcidev_t dev, int offset, u_long *base)
{
u_int32 tmp;
pci_read_config_dword(dev, PCI_BASE_ADDRESS_0 + offset, &tmp);
*base = tmp;
offset += sizeof(u_int32);
if ((tmp & 0x7) == 0x4) {
#if BITS_PER_LONG > 32
pci_read_config_dword(dev, PCI_BASE_ADDRESS_0 + offset, &tmp);
*base |= (((u_long)tmp) << 32);
#endif
offset += sizeof(u_int32);
}
return offset;
}
static u_long __init
pci_get_base_cookie(struct pci_dev *pdev, int offset)
{
u_long base;
(void) pci_get_base_address(dev, offset, &base);
return base;
}
#endif /* LINUX_VERSION_CODE >= LinuxVersionCode(2,2,0) */
/* Does not make sense in earlier kernels */
#if LINUX_VERSION_CODE < LinuxVersionCode(2,4,0)
#define pci_enable_device(pdev) (0)
#endif
#if LINUX_VERSION_CODE < LinuxVersionCode(2,4,4)
#define scsi_set_pci_device(inst, pdev) (0)
#endif
/*==========================================================
**
** Debugging tags
**
**==========================================================
*/
#define DEBUG_ALLOC (0x0001)
#define DEBUG_PHASE (0x0002)
#define DEBUG_QUEUE (0x0008)
#define DEBUG_RESULT (0x0010)
#define DEBUG_POINTER (0x0020)
#define DEBUG_SCRIPT (0x0040)
#define DEBUG_TINY (0x0080)
#define DEBUG_TIMING (0x0100)
#define DEBUG_NEGO (0x0200)
#define DEBUG_TAGS (0x0400)
#define DEBUG_IC (0x0800)
/*
** Enable/Disable debug messages.
** Can be changed at runtime too.
*/
#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
static int ncr_debug = SCSI_NCR_DEBUG_FLAGS;
#define DEBUG_FLAGS ncr_debug
#else
#define DEBUG_FLAGS SCSI_NCR_DEBUG_FLAGS
#endif
/*
** SMP threading.
**
** Assuming that SMP systems are generally high end systems and may
** use several SCSI adapters, we are using one lock per controller
** instead of some global one. For the moment (linux-2.1.95), driver's
** entry points are called with the 'io_request_lock' lock held, so:
** - We are uselessly loosing a couple of micro-seconds to lock the
** controller data structure.
** - But the driver is not broken by design for SMP and so can be
** more resistant to bugs or bad changes in the IO sub-system code.
** - A small advantage could be that the interrupt code is grained as
** wished (e.g.: threaded by controller).
*/
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,93)
spinlock_t sym53c8xx_lock = SPIN_LOCK_UNLOCKED;
#define NCR_LOCK_DRIVER(flags) spin_lock_irqsave(&sym53c8xx_lock, flags)
#define NCR_UNLOCK_DRIVER(flags) spin_unlock_irqrestore(&sym53c8xx_lock,flags)
#define NCR_INIT_LOCK_NCB(np) spin_lock_init(&np->smp_lock);
#define NCR_LOCK_NCB(np, flags) spin_lock_irqsave(&np->smp_lock, flags)
#define NCR_UNLOCK_NCB(np, flags) spin_unlock_irqrestore(&np->smp_lock, flags)
#define NCR_LOCK_SCSI_DONE(host, flags) \
spin_lock_irqsave(((host)->host_lock), flags)
#define NCR_UNLOCK_SCSI_DONE(host, flags) \
spin_unlock_irqrestore(((host)->host_lock), flags)
#else
#define NCR_LOCK_DRIVER(flags) do { save_flags(flags); cli(); } while (0)
#define NCR_UNLOCK_DRIVER(flags) do { restore_flags(flags); } while (0)
#define NCR_INIT_LOCK_NCB(np) do { } while (0)
#define NCR_LOCK_NCB(np, flags) do { save_flags(flags); cli(); } while (0)
#define NCR_UNLOCK_NCB(np, flags) do { restore_flags(flags); } while (0)
#define NCR_LOCK_SCSI_DONE(host, flags) do {;} while (0)
#define NCR_UNLOCK_SCSI_DONE(host, flags) do {;} while (0)
#endif
/*
** Memory mapped IO
**
** Since linux-2.1, we must use ioremap() to map the io memory space.
** iounmap() to unmap it. That allows portability.
** Linux 1.3.X and 2.0.X allow to remap physical pages addresses greater
** than the highest physical memory address to kernel virtual pages with
** vremap() / vfree(). That was not portable but worked with i386
** architecture.
*/
#if LINUX_VERSION_CODE < LinuxVersionCode(2,1,0)
#define ioremap vremap
#define iounmap vfree
#endif
#ifdef __sparc__
# include <asm/irq.h>
# define memcpy_to_pci(a, b, c) memcpy_toio((a), (b), (c))
#elif defined(__alpha__)
# define memcpy_to_pci(a, b, c) memcpy_toio((a), (b), (c))
#else /* others */
# define memcpy_to_pci(a, b, c) memcpy_toio((a), (b), (c))
#endif
#ifndef SCSI_NCR_PCI_MEM_NOT_SUPPORTED
static u_long __init remap_pci_mem(u_long base, u_long size)
{
u_long page_base = ((u_long) base) & PAGE_MASK;
u_long page_offs = ((u_long) base) - page_base;
u_long page_remapped = (u_long) ioremap(page_base, page_offs+size);
return page_remapped? (page_remapped + page_offs) : 0UL;
}
static void __init unmap_pci_mem(u_long vaddr, u_long size)
{
if (vaddr)
iounmap((void *) (vaddr & PAGE_MASK));
}
#endif /* not def SCSI_NCR_PCI_MEM_NOT_SUPPORTED */
/*
** Insert a delay in micro-seconds and milli-seconds.
** -------------------------------------------------
** Under Linux, udelay() is restricted to delay < 1 milli-second.
** In fact, it generally works for up to 1 second delay.
** Since 2.1.105, the mdelay() function is provided for delays
** in milli-seconds.
** Under 2.0 kernels, udelay() is an inline function that is very
** inaccurate on Pentium processors.
*/
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,105)
#define UDELAY udelay
#define MDELAY mdelay
#else
static void UDELAY(long us) { udelay(us); }
static void MDELAY(long ms) { while (ms--) UDELAY(1000); }
#endif
/*
** Simple power of two buddy-like allocator
** ----------------------------------------
** This simple code is not intended to be fast, but to provide
** power of 2 aligned memory allocations.
** Since the SCRIPTS processor only supplies 8 bit arithmetic,
** this allocator allows simple and fast address calculations
** from the SCRIPTS code. In addition, cache line alignment
** is guaranteed for power of 2 cache line size.
** Enhanced in linux-2.3.44 to provide a memory pool per pcidev
** to support dynamic dma mapping. (I would have preferred a
** real bus astraction, btw).
*/
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,0)
#define __GetFreePages(flags, order) __get_free_pages(flags, order)
#else
#define __GetFreePages(flags, order) __get_free_pages(flags, order, 0)
#endif
#define MEMO_SHIFT 4 /* 16 bytes minimum memory chunk */
#if PAGE_SIZE >= 8192
#define MEMO_PAGE_ORDER 0 /* 1 PAGE maximum */
#else
#define MEMO_PAGE_ORDER 1 /* 2 PAGES maximum */
#endif
#define MEMO_FREE_UNUSED /* Free unused pages immediately */
#define MEMO_WARN 1
#define MEMO_GFP_FLAGS GFP_ATOMIC
#define MEMO_CLUSTER_SHIFT (PAGE_SHIFT+MEMO_PAGE_ORDER)
#define MEMO_CLUSTER_SIZE (1UL << MEMO_CLUSTER_SHIFT)
#define MEMO_CLUSTER_MASK (MEMO_CLUSTER_SIZE-1)
typedef u_long m_addr_t; /* Enough bits to bit-hack addresses */
typedef pcidev_t m_bush_t; /* Something that addresses DMAable */
typedef struct m_link { /* Link between free memory chunks */
struct m_link *next;
} m_link_s;
#ifdef SCSI_NCR_DYNAMIC_DMA_MAPPING
typedef struct m_vtob { /* Virtual to Bus address translation */
struct m_vtob *next;
m_addr_t vaddr;
m_addr_t baddr;
} m_vtob_s;
#define VTOB_HASH_SHIFT 5
#define VTOB_HASH_SIZE (1UL << VTOB_HASH_SHIFT)
#define VTOB_HASH_MASK (VTOB_HASH_SIZE-1)
#define VTOB_HASH_CODE(m) \
((((m_addr_t) (m)) >> MEMO_CLUSTER_SHIFT) & VTOB_HASH_MASK)
#endif
typedef struct m_pool { /* Memory pool of a given kind */
#ifdef SCSI_NCR_DYNAMIC_DMA_MAPPING
m_bush_t bush;
m_addr_t (*getp)(struct m_pool *);
void (*freep)(struct m_pool *, m_addr_t);
#define M_GETP() mp->getp(mp)
#define M_FREEP(p) mp->freep(mp, p)
#define GetPages() __GetFreePages(MEMO_GFP_FLAGS, MEMO_PAGE_ORDER)
#define FreePages(p) free_pages(p, MEMO_PAGE_ORDER)
int nump;
m_vtob_s *(vtob[VTOB_HASH_SIZE]);
struct m_pool *next;
#else
#define M_GETP() __GetFreePages(MEMO_GFP_FLAGS, MEMO_PAGE_ORDER)
#define M_FREEP(p) free_pages(p, MEMO_PAGE_ORDER)
#endif /* SCSI_NCR_DYNAMIC_DMA_MAPPING */
struct m_link h[PAGE_SHIFT-MEMO_SHIFT+MEMO_PAGE_ORDER+1];
} m_pool_s;
static void *___m_alloc(m_pool_s *mp, int size)
{
int i = 0;
int s = (1 << MEMO_SHIFT);
int j;
m_addr_t a;
m_link_s *h = mp->h;
if (size > (PAGE_SIZE << MEMO_PAGE_ORDER))
return 0;
while (size > s) {
s <<= 1;
++i;
}
j = i;
while (!h[j].next) {
if (s == (PAGE_SIZE << MEMO_PAGE_ORDER)) {
h[j].next = (m_link_s *) M_GETP();
if (h[j].next)
h[j].next->next = 0;
break;
}
++j;
s <<= 1;
}
a = (m_addr_t) h[j].next;
if (a) {
h[j].next = h[j].next->next;
while (j > i) {
j -= 1;
s >>= 1;
h[j].next = (m_link_s *) (a+s);
h[j].next->next = 0;
}
}
#ifdef DEBUG
printk("___m_alloc(%d) = %p\n", size, (void *) a);
#endif
return (void *) a;
}
static void ___m_free(m_pool_s *mp, void *ptr, int size)
{
int i = 0;
int s = (1 << MEMO_SHIFT);
m_link_s *q;
m_addr_t a, b;
m_link_s *h = mp->h;
#ifdef DEBUG
printk("___m_free(%p, %d)\n", ptr, size);
#endif
if (size > (PAGE_SIZE << MEMO_PAGE_ORDER))
return;
while (size > s) {
s <<= 1;
++i;
}
a = (m_addr_t) ptr;
while (1) {
#ifdef MEMO_FREE_UNUSED
if (s == (PAGE_SIZE << MEMO_PAGE_ORDER)) {
M_FREEP(a);
break;
}
#endif
b = a ^ s;
q = &h[i];
while (q->next && q->next != (m_link_s *) b) {
q = q->next;
}
if (!q->next) {
((m_link_s *) a)->next = h[i].next;
h[i].next = (m_link_s *) a;
break;
}
q->next = q->next->next;
a = a & b;
s <<= 1;
++i;
}
}
static void *__m_calloc2(m_pool_s *mp, int size, char *name, int uflags)
{
void *p;
p = ___m_alloc(mp, size);
if (DEBUG_FLAGS & DEBUG_ALLOC)
printk ("new %-10s[%4d] @%p.\n", name, size, p);
if (p)
bzero(p, size);
else if (uflags & MEMO_WARN)
printk (NAME53C8XX ": failed to allocate %s[%d]\n", name, size);
return p;
}
#define __m_calloc(mp, s, n) __m_calloc2(mp, s, n, MEMO_WARN)
static void __m_free(m_pool_s *mp, void *ptr, int size, char *name)
{
if (DEBUG_FLAGS & DEBUG_ALLOC)
printk ("freeing %-10s[%4d] @%p.\n", name, size, ptr);
___m_free(mp, ptr, size);
}
/*
* With pci bus iommu support, we use a default pool of unmapped memory
* for memory we donnot need to DMA from/to and one pool per pcidev for
* memory accessed by the PCI chip. `mp0' is the default not DMAable pool.
*/
#ifndef SCSI_NCR_DYNAMIC_DMA_MAPPING
static m_pool_s mp0;
#else
static m_addr_t ___mp0_getp(m_pool_s *mp)
{
m_addr_t m = GetPages();
if (m)
++mp->nump;
return m;
}
static void ___mp0_freep(m_pool_s *mp, m_addr_t m)
{
FreePages(m);
--mp->nump;
}
static m_pool_s mp0 = {0, ___mp0_getp, ___mp0_freep};
#endif /* SCSI_NCR_DYNAMIC_DMA_MAPPING */
static void *m_calloc(int size, char *name)
{
u_long flags;
void *m;
NCR_LOCK_DRIVER(flags);
m = __m_calloc(&mp0, size, name);
NCR_UNLOCK_DRIVER(flags);
return m;
}
static void m_free(void *ptr, int size, char *name)
{
u_long flags;
NCR_LOCK_DRIVER(flags);
__m_free(&mp0, ptr, size, name);
NCR_UNLOCK_DRIVER(flags);
}
/*
* DMAable pools.
*/
#ifndef SCSI_NCR_DYNAMIC_DMA_MAPPING
/* Without pci bus iommu support, all the memory is assumed DMAable */
#define __m_calloc_dma(b, s, n) m_calloc(s, n)
#define __m_free_dma(b, p, s, n) m_free(p, s, n)
#define __vtobus(b, p) virt_to_bus(p)
#else
/*
* With pci bus iommu support, we maintain one pool per pcidev and a
* hashed reverse table for virtual to bus physical address translations.
*/
static m_addr_t ___dma_getp(m_pool_s *mp)
{
m_addr_t vp;
m_vtob_s *vbp;
vbp = __m_calloc(&mp0, sizeof(*vbp), "VTOB");
if (vbp) {
dma_addr_t daddr;
vp = (m_addr_t) pci_alloc_consistent(mp->bush,
PAGE_SIZE<<MEMO_PAGE_ORDER,
&daddr);
if (vp) {
int hc = VTOB_HASH_CODE(vp);
vbp->vaddr = vp;
vbp->baddr = daddr;
vbp->next = mp->vtob[hc];
mp->vtob[hc] = vbp;
++mp->nump;
return vp;
}
else
__m_free(&mp0, vbp, sizeof(*vbp), "VTOB");
}
return 0;
}
static void ___dma_freep(m_pool_s *mp, m_addr_t m)
{
m_vtob_s **vbpp, *vbp;
int hc = VTOB_HASH_CODE(m);
vbpp = &mp->vtob[hc];
while (*vbpp && (*vbpp)->vaddr != m)
vbpp = &(*vbpp)->next;
if (*vbpp) {
vbp = *vbpp;
*vbpp = (*vbpp)->next;
pci_free_consistent(mp->bush, PAGE_SIZE<<MEMO_PAGE_ORDER,
(void *)vbp->vaddr, (dma_addr_t)vbp->baddr);
__m_free(&mp0, vbp, sizeof(*vbp), "VTOB");
--mp->nump;
}
}
static inline m_pool_s *___get_dma_pool(m_bush_t bush)
{
m_pool_s *mp;
for (mp = mp0.next; mp && mp->bush != bush; mp = mp->next);
return mp;
}
static m_pool_s *___cre_dma_pool(m_bush_t bush)
{
m_pool_s *mp;
mp = __m_calloc(&mp0, sizeof(*mp), "MPOOL");
if (mp) {
bzero(mp, sizeof(*mp));
mp->bush = bush;
mp->getp = ___dma_getp;
mp->freep = ___dma_freep;
mp->next = mp0.next;
mp0.next = mp;
}
return mp;
}
static void ___del_dma_pool(m_pool_s *p)
{
struct m_pool **pp = &mp0.next;
while (*pp && *pp != p)
pp = &(*pp)->next;
if (*pp) {
*pp = (*pp)->next;
__m_free(&mp0, p, sizeof(*p), "MPOOL");
}
}
static void *__m_calloc_dma(m_bush_t bush, int size, char *name)
{
u_long flags;
struct m_pool *mp;
void *m = 0;
NCR_LOCK_DRIVER(flags);
mp = ___get_dma_pool(bush);
if (!mp)
mp = ___cre_dma_pool(bush);
if (mp)
m = __m_calloc(mp, size, name);
if (mp && !mp->nump)
___del_dma_pool(mp);
NCR_UNLOCK_DRIVER(flags);
return m;
}
static void __m_free_dma(m_bush_t bush, void *m, int size, char *name)
{
u_long flags;
struct m_pool *mp;
NCR_LOCK_DRIVER(flags);
mp = ___get_dma_pool(bush);
if (mp)
__m_free(mp, m, size, name);
if (mp && !mp->nump)
___del_dma_pool(mp);
NCR_UNLOCK_DRIVER(flags);
}
static m_addr_t __vtobus(m_bush_t bush, void *m)
{
u_long flags;
m_pool_s *mp;
int hc = VTOB_HASH_CODE(m);
m_vtob_s *vp = 0;
m_addr_t a = ((m_addr_t) m) & ~MEMO_CLUSTER_MASK;
NCR_LOCK_DRIVER(flags);
mp = ___get_dma_pool(bush);
if (mp) {
vp = mp->vtob[hc];
while (vp && (m_addr_t) vp->vaddr != a)
vp = vp->next;
}
NCR_UNLOCK_DRIVER(flags);
return vp ? vp->baddr + (((m_addr_t) m) - a) : 0;
}
#endif /* SCSI_NCR_DYNAMIC_DMA_MAPPING */
#define _m_calloc_dma(np, s, n) __m_calloc_dma(np->pdev, s, n)
#define _m_free_dma(np, p, s, n) __m_free_dma(np->pdev, p, s, n)
#define m_calloc_dma(s, n) _m_calloc_dma(np, s, n)
#define m_free_dma(p, s, n) _m_free_dma(np, p, s, n)
#define _vtobus(np, p) __vtobus(np->pdev, p)
#define vtobus(p) _vtobus(np, p)
/*
* Deal with DMA mapping/unmapping.
*/
#ifndef SCSI_NCR_DYNAMIC_DMA_MAPPING
/* Linux versions prior to pci bus iommu kernel interface */
#define __unmap_scsi_data(pdev, cmd) do {; } while (0)
#define __map_scsi_single_data(pdev, cmd) (__vtobus(pdev,(cmd)->request_buffer))
#define __map_scsi_sg_data(pdev, cmd) ((cmd)->use_sg)
#define __sync_scsi_data(pdev, cmd) do {; } while (0)
#define scsi_sg_dma_address(sc) vtobus((sc)->address)
#define scsi_sg_dma_len(sc) ((sc)->length)
#else
/* Linux version with pci bus iommu kernel interface */
/* To keep track of the dma mapping (sg/single) that has been set */
#define __data_mapped(cmd) (cmd)->SCp.phase
#define __data_mapping(cmd) (cmd)->SCp.dma_handle
static void __unmap_scsi_data(pcidev_t pdev, Scsi_Cmnd *cmd)
{
int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
switch(__data_mapped(cmd)) {
case 2:
pci_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
break;
case 1:
pci_unmap_page(pdev, __data_mapping(cmd),
cmd->request_bufflen, dma_dir);
break;
}
__data_mapped(cmd) = 0;
}
static dma_addr_t __map_scsi_single_data(pcidev_t pdev, Scsi_Cmnd *cmd)
{
dma_addr_t mapping;
int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
if (cmd->request_bufflen == 0)
return 0;
mapping = pci_map_page(pdev,
virt_to_page(cmd->request_buffer),
((unsigned long)cmd->request_buffer &
~PAGE_MASK),
cmd->request_bufflen, dma_dir);
__data_mapped(cmd) = 1;
__data_mapping(cmd) = mapping;
return mapping;
}
static int __map_scsi_sg_data(pcidev_t pdev, Scsi_Cmnd *cmd)
{
int use_sg;
int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
if (cmd->use_sg == 0)
return 0;
use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
__data_mapped(cmd) = 2;
__data_mapping(cmd) = use_sg;
return use_sg;
}
static void __sync_scsi_data(pcidev_t pdev, Scsi_Cmnd *cmd)
{
int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
switch(__data_mapped(cmd)) {
case 2:
pci_dma_sync_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
break;
case 1:
pci_dma_sync_single(pdev, __data_mapping(cmd),
cmd->request_bufflen, dma_dir);
break;
}
}
#define scsi_sg_dma_address(sc) sg_dma_address(sc)
#define scsi_sg_dma_len(sc) sg_dma_len(sc)
#endif /* SCSI_NCR_DYNAMIC_DMA_MAPPING */
#define unmap_scsi_data(np, cmd) __unmap_scsi_data(np->pdev, cmd)
#define map_scsi_single_data(np, cmd) __map_scsi_single_data(np->pdev, cmd)
#define map_scsi_sg_data(np, cmd) __map_scsi_sg_data(np->pdev, cmd)
#define sync_scsi_data(np, cmd) __sync_scsi_data(np->pdev, cmd)
/*
* Print out some buffer.
*/
static void ncr_print_hex(u_char *p, int n)
{
while (n-- > 0)
printk (" %x", *p++);
}
static void ncr_printl_hex(char *label, u_char *p, int n)
{
printk("%s", label);
ncr_print_hex(p, n);
printk (".\n");
}
/*
** Transfer direction
**
** Until some linux kernel version near 2.3.40, low-level scsi
** drivers were not told about data transfer direction.
** We check the existence of this feature that has been expected
** for a _long_ time by all SCSI driver developers by just
** testing against the definition of SCSI_DATA_UNKNOWN. Indeed
** this is a hack, but testing against a kernel version would
** have been a shame. ;-)
*/
#ifdef SCSI_DATA_UNKNOWN
#define scsi_data_direction(cmd) (cmd->sc_data_direction)
#else
#define SCSI_DATA_UNKNOWN 0
#define SCSI_DATA_WRITE 1
#define SCSI_DATA_READ 2
#define SCSI_DATA_NONE 3
static __inline__ int scsi_data_direction(Scsi_Cmnd *cmd)
{
int direction;
switch((int) cmd->cmnd[0]) {
case 0x08: /* READ(6) 08 */
case 0x28: /* READ(10) 28 */
case 0xA8: /* READ(12) A8 */
direction = SCSI_DATA_READ;
break;
case 0x0A: /* WRITE(6) 0A */
case 0x2A: /* WRITE(10) 2A */
case 0xAA: /* WRITE(12) AA */
direction = SCSI_DATA_WRITE;
break;
default:
direction = SCSI_DATA_UNKNOWN;
break;
}
return direction;
}
#endif /* SCSI_DATA_UNKNOWN */
/*
** /proc directory entry and proc_info function
*/
#if LINUX_VERSION_CODE < LinuxVersionCode(2,3,27)
static struct proc_dir_entry proc_scsi_sym53c8xx = {
PROC_SCSI_SYM53C8XX, 9, NAME53C8XX,
S_IFDIR | S_IRUGO | S_IXUGO, 2
};
#endif
#ifdef SCSI_NCR_PROC_INFO_SUPPORT
static int sym53c8xx_proc_info(char *buffer, char **start, off_t offset,
int length, int hostno, int func);
#endif
/*
** Driver setup.
**
** This structure is initialized from linux config options.
** It can be overridden at boot-up by the boot command line.
*/
static struct ncr_driver_setup
driver_setup = SCSI_NCR_DRIVER_SETUP;
#ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
static struct ncr_driver_setup
driver_safe_setup __initdata = SCSI_NCR_DRIVER_SAFE_SETUP;
# ifdef MODULE
char *sym53c8xx = 0; /* command line passed by insmod */
# if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,30)
MODULE_PARM(sym53c8xx, "s");
# endif
# endif
#endif
/*
** Other Linux definitions
*/
#define SetScsiResult(cmd, h_sts, s_sts) \
cmd->result = (((h_sts) << 16) + ((s_sts) & 0x7f))
/* We may have to remind our amnesiac SCSI layer of the reason of the abort */
#if 0
#define SetScsiAbortResult(cmd) \
SetScsiResult( \
cmd, \
(cmd)->abort_reason == DID_TIME_OUT ? DID_TIME_OUT : DID_ABORT, \
0xff)
#else
#define SetScsiAbortResult(cmd) SetScsiResult(cmd, DID_ABORT, 0xff)
#endif
static void sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs);
static void sym53c8xx_timeout(unsigned long np);
#define initverbose (driver_setup.verbose)
#define bootverbose (np->verbose)
#ifdef SCSI_NCR_NVRAM_SUPPORT
static u_char Tekram_sync[16] __initdata =
{25,31,37,43, 50,62,75,125, 12,15,18,21, 6,7,9,10};
#endif /* SCSI_NCR_NVRAM_SUPPORT */
/*
** Structures used by sym53c8xx_detect/sym53c8xx_pci_init to
** transmit device configuration to the ncr_attach() function.
*/
typedef struct {
int bus;
u_char device_fn;
u_long base;
u_long base_2;
u_long io_port;
u_long base_c;
u_long base_2_c;
int irq;
/* port and reg fields to use INB, OUTB macros */
u_long base_io;
volatile struct ncr_reg *reg;
} ncr_slot;
typedef struct {
int type;
#define SCSI_NCR_SYMBIOS_NVRAM (1)
#define SCSI_NCR_TEKRAM_NVRAM (2)
#ifdef SCSI_NCR_NVRAM_SUPPORT
union {
Symbios_nvram Symbios;
Tekram_nvram Tekram;
} data;
#endif
} ncr_nvram;
/*
** Structure used by sym53c8xx_detect/sym53c8xx_pci_init
** to save data on each detected board for ncr_attach().
*/
typedef struct {
pcidev_t pdev;
ncr_slot slot;
ncr_chip chip;
ncr_nvram *nvram;
u_char host_id;
#ifdef SCSI_NCR_PQS_PDS_SUPPORT
u_char pqs_pds;
#endif
int attach_done;
} ncr_device;
/*==========================================================
**
** assert ()
**
**==========================================================
**
** modified copy from 386bsd:/usr/include/sys/assert.h
**
**----------------------------------------------------------
*/
#define assert(expression) { \
if (!(expression)) { \
(void)panic( \
"assertion \"%s\" failed: file \"%s\", line %d\n", \
#expression, \
__FILE__, __LINE__); \
} \
}
/*==========================================================
**
** Command control block states.
**
**==========================================================
*/
#define HS_IDLE (0)
#define HS_BUSY (1)
#define HS_NEGOTIATE (2) /* sync/wide data transfer*/
#define HS_DISCONNECT (3) /* Disconnected by target */
#define HS_DONEMASK (0x80)
#define HS_COMPLETE (4|HS_DONEMASK)
#define HS_SEL_TIMEOUT (5|HS_DONEMASK) /* Selection timeout */
#define HS_RESET (6|HS_DONEMASK) /* SCSI reset */
#define HS_ABORTED (7|HS_DONEMASK) /* Transfer aborted */
#define HS_TIMEOUT (8|HS_DONEMASK) /* Software timeout */
#define HS_FAIL (9|HS_DONEMASK) /* SCSI or PCI bus errors */
#define HS_UNEXPECTED (10|HS_DONEMASK)/* Unexpected disconnect */
#define DSA_INVALID 0xffffffff
/*==========================================================
**
** Software Interrupt Codes
**
**==========================================================
*/
#define SIR_BAD_STATUS (1)
#define SIR_SEL_ATN_NO_MSG_OUT (2)
#define SIR_MSG_RECEIVED (3)
#define SIR_MSG_WEIRD (4)
#define SIR_NEGO_FAILED (5)
#define SIR_NEGO_PROTO (6)
#define SIR_SCRIPT_STOPPED (7)
#define SIR_REJECT_TO_SEND (8)
#define SIR_SWIDE_OVERRUN (9)
#define SIR_SODL_UNDERRUN (10)
#define SIR_RESEL_NO_MSG_IN (11)
#define SIR_RESEL_NO_IDENTIFY (12)
#define SIR_RESEL_BAD_LUN (13)
#define SIR_TARGET_SELECTED (14)
#define SIR_RESEL_BAD_I_T_L (15)
#define SIR_RESEL_BAD_I_T_L_Q (16)
#define SIR_ABORT_SENT (17)
#define SIR_RESEL_ABORTED (18)
#define SIR_MSG_OUT_DONE (19)
#define SIR_AUTO_SENSE_DONE (20)
#define SIR_DUMMY_INTERRUPT (21)
#define SIR_DATA_OVERRUN (22)
#define SIR_BAD_PHASE (23)
#define SIR_MAX (23)
/*==========================================================
**
** Extended error bits.
** xerr_status field of struct ccb.
**
**==========================================================
*/
#define XE_EXTRA_DATA (1) /* unexpected data phase */
#define XE_BAD_PHASE (2) /* illegal phase (4/5) */
#define XE_PARITY_ERR (4) /* unrecovered SCSI parity error */
#define XE_SODL_UNRUN (1<<3)
#define XE_SWIDE_OVRUN (1<<4)
/*==========================================================
**
** Negotiation status.
** nego_status field of struct ccb.
**
**==========================================================
*/
#define NS_NOCHANGE (0)
#define NS_SYNC (1)
#define NS_WIDE (2)
#define NS_PPR (4)
/*==========================================================
**
** "Special features" of targets.
** quirks field of struct tcb.
** actualquirks field of struct ccb.
**
**==========================================================
*/
#define QUIRK_AUTOSAVE (0x01)
/*==========================================================
**
** Capability bits in Inquire response byte 7.
**
**==========================================================
*/
#define INQ7_QUEUE (0x02)
#define INQ7_SYNC (0x10)
#define INQ7_WIDE16 (0x20)
/*==========================================================
**
** A CCB hashed table is used to retrieve CCB address
** from DSA value.
**
**==========================================================
*/
#define CCB_HASH_SHIFT 8
#define CCB_HASH_SIZE (1UL << CCB_HASH_SHIFT)
#define CCB_HASH_MASK (CCB_HASH_SIZE-1)
#define CCB_HASH_CODE(dsa) (((dsa) >> 11) & CCB_HASH_MASK)
/*==========================================================
**
** Declaration of structs.
**
**==========================================================
*/
struct tcb;
struct lcb;
struct ccb;
struct ncb;
struct script;
typedef struct ncb * ncb_p;
typedef struct tcb * tcb_p;
typedef struct lcb * lcb_p;
typedef struct ccb * ccb_p;
struct link {
ncrcmd l_cmd;
ncrcmd l_paddr;
};
struct usrcmd {
u_long target;
u_long lun;
u_long data;
u_long cmd;
};
#define UC_SETSYNC 10
#define UC_SETTAGS 11
#define UC_SETDEBUG 12
#define UC_SETORDER 13
#define UC_SETWIDE 14
#define UC_SETFLAG 15
#define UC_SETVERBOSE 17
#define UC_RESETDEV 18
#define UC_CLEARDEV 19
#define UF_TRACE (0x01)
#define UF_NODISC (0x02)
#define UF_NOSCAN (0x04)
/*========================================================================
**
** Declaration of structs: target control block
**
**========================================================================
*/
struct tcb {
/*----------------------------------------------------------------
** LUN tables.
** An array of bus addresses is used on reselection by
** the SCRIPT.
**----------------------------------------------------------------
*/
u_int32 *luntbl; /* lcbs bus address table */
u_int32 b_luntbl; /* bus address of this table */
u_int32 b_lun0; /* bus address of lun0 */
lcb_p l0p; /* lcb of LUN #0 (normal case) */
#if MAX_LUN > 1
lcb_p *lmp; /* Other lcb's [1..MAX_LUN] */
#endif
/*----------------------------------------------------------------
** Target capabilities.
**----------------------------------------------------------------
*/
u_char inq_done; /* Target capabilities received */
u_char inq_byte7; /* Contains these capabilities */
/*----------------------------------------------------------------
** Some flags.
**----------------------------------------------------------------
*/
u_char to_reset; /* This target is to be reset */
/*----------------------------------------------------------------
** Pointer to the ccb used for negotiation.
** Prevent from starting a negotiation for all queued commands
** when tagged command queuing is enabled.
**----------------------------------------------------------------
*/
ccb_p nego_cp;
/*----------------------------------------------------------------
** negotiation of wide and synch transfer and device quirks.
** sval, wval and uval are read from SCRIPTS and so have alignment
** constraints.
**----------------------------------------------------------------
*/
/*0*/ u_char uval;
/*1*/ u_char sval;
/*2*/ u_char filler2;
/*3*/ u_char wval;
u_short period;
u_char minsync;
u_char maxoffs;
u_char quirks;
u_char widedone;
#ifdef SCSI_NCR_INTEGRITY_CHECKING
u_char ic_min_sync;
u_char ic_max_width;
u_char ic_done;
#endif
u_char ic_maximums_set;
u_char ppr_negotiation;
/*----------------------------------------------------------------
** User settable limits and options.
** These limits are read from the NVRAM if present.
**----------------------------------------------------------------
*/
u_char usrsync;
u_char usrwide;
u_short usrtags;
u_char usrflag;
};
/*========================================================================
**
** Declaration of structs: lun control block
**
**========================================================================
*/
struct lcb {
/*----------------------------------------------------------------
** On reselection, SCRIPTS use this value as a JUMP address
** after the IDENTIFY has been successfully received.
** This field is set to 'resel_tag' if TCQ is enabled and
** to 'resel_notag' if TCQ is disabled.
** (Must be at zero due to bad lun handling on reselection)
**----------------------------------------------------------------
*/
/*0*/ u_int32 resel_task;
/*----------------------------------------------------------------
** Task table used by the script processor to retrieve the
** task corresponding to a reselected nexus. The TAG is used
** as offset to determine the corresponding entry.
** Each entry contains the associated CCB bus address.
**----------------------------------------------------------------
*/
u_int32 tasktbl_0; /* Used if TCQ not enabled */
u_int32 *tasktbl;
u_int32 b_tasktbl;
/*----------------------------------------------------------------
** CCB queue management.
**----------------------------------------------------------------
*/
XPT_QUEHEAD busy_ccbq; /* Queue of busy CCBs */
XPT_QUEHEAD wait_ccbq; /* Queue of waiting for IO CCBs */
u_short busyccbs; /* CCBs busy for this lun */
u_short queuedccbs; /* CCBs queued to the controller*/
u_short queuedepth; /* Queue depth for this lun */
u_short scdev_depth; /* SCSI device queue depth */
u_short maxnxs; /* Max possible nexuses */
/*----------------------------------------------------------------
** Control of tagged command queuing.
** Tags allocation is performed using a circular buffer.
** This avoids using a loop for tag allocation.
**----------------------------------------------------------------
*/
u_short ia_tag; /* Tag allocation index */
u_short if_tag; /* Tag release index */
u_char *cb_tags; /* Circular tags buffer */
u_char inq_byte7; /* Store unit CmdQ capability */
u_char usetags; /* Command queuing is active */
u_char to_clear; /* User wants to clear all tasks*/
u_short maxtags; /* Max NR of tags asked by user */
u_short numtags; /* Current number of tags */
/*----------------------------------------------------------------
** QUEUE FULL and ORDERED tag control.
**----------------------------------------------------------------
*/
u_short num_good; /* Nr of GOOD since QUEUE FULL */
u_short tags_sum[2]; /* Tags sum counters */
u_char tags_si; /* Current index to tags sum */
u_long tags_stime; /* Last time we switch tags_sum */
};
/*========================================================================
**
** Declaration of structs: actions for a task.
**
**========================================================================
**
** It is part of the CCB and is called by the scripts processor to
** start or restart the data structure (nexus).
**
**------------------------------------------------------------------------
*/
struct action {
u_int32 start;
u_int32 restart;
};
/*========================================================================
**
** Declaration of structs: Phase mismatch context.
**
**========================================================================
**
** It is part of the CCB and is used as parameters for the DATA
** pointer. We need two contexts to handle correctly the SAVED
** DATA POINTER.
**
**------------------------------------------------------------------------
*/
struct pm_ctx {
struct scr_tblmove sg; /* Updated interrupted SG block */
u_int32 ret; /* SCRIPT return address */
};
/*========================================================================
**
** Declaration of structs: global HEADER.
**
**========================================================================
**
** In earlier driver versions, this substructure was copied from the
** ccb to a global address after selection (or reselection) and copied
** back before disconnect. Since we are now using LOAD/STORE DSA
** RELATIVE instructions, the script is able to access directly these
** fields, and so, this header is no more copied.
**
**------------------------------------------------------------------------
*/
struct head {
/*----------------------------------------------------------------
** Start and restart SCRIPTS addresses (must be at 0).
**----------------------------------------------------------------
*/
struct action go;
/*----------------------------------------------------------------
** Saved data pointer.
** Points to the position in the script responsible for the
** actual transfer of data.
** It's written after reception of a SAVE_DATA_POINTER message.
** The goalpointer points after the last transfer command.
**----------------------------------------------------------------
*/
u_int32 savep;
u_int32 lastp;
u_int32 goalp;
/*----------------------------------------------------------------
** Alternate data pointer.
** They are copied back to savep/lastp/goalp by the SCRIPTS
** when the direction is unknown and the device claims data out.
**----------------------------------------------------------------
*/
u_int32 wlastp;
u_int32 wgoalp;
/*----------------------------------------------------------------
** Status fields.
**----------------------------------------------------------------
*/
u_char status[4]; /* host status */
};
/*
** LUN control block lookup.
** We use a direct pointer for LUN #0, and a table of pointers
** which is only allocated for devices that support LUN(s) > 0.
*/
#if MAX_LUN <= 1
#define ncr_lp(np, tp, lun) (!lun) ? (tp)->l0p : 0
#else
#define ncr_lp(np, tp, lun) \
(!lun) ? (tp)->l0p : (tp)->lmp ? (tp)->lmp[(lun)] : 0
#endif
/*
** The status bytes are used by the host and the script processor.
**
** The four bytes (status[4]) are copied to the scratchb register
** (declared as scr0..scr3 in ncr_reg.h) just after the select/reselect,
** and copied back just after disconnecting.
** Inside the script the XX_REG are used.
*/
/*
** Last four bytes (script)
*/
#define QU_REG scr0
#define HS_REG scr1
#define HS_PRT nc_scr1
#define SS_REG scr2
#define SS_PRT nc_scr2
#define HF_REG scr3
#define HF_PRT nc_scr3
/*
** Last four bytes (host)
*/
#define actualquirks phys.header.status[0]
#define host_status phys.header.status[1]
#define scsi_status phys.header.status[2]
#define host_flags phys.header.status[3]
/*
** Host flags
*/
#define HF_IN_PM0 1u
#define HF_IN_PM1 (1u<<1)
#define HF_ACT_PM (1u<<2)
#define HF_DP_SAVED (1u<<3)
#define HF_AUTO_SENSE (1u<<4)
#define HF_DATA_IN (1u<<5)
#define HF_PM_TO_C (1u<<6)
#define HF_EXT_ERR (1u<<7)
#ifdef SCSI_NCR_IARB_SUPPORT
#define HF_HINT_IARB (1u<<7)
#endif
/*
** This one is stolen from QU_REG.:)
*/
#define HF_DATA_ST (1u<<7)
/*==========================================================
**
** Declaration of structs: Data structure block
**
**==========================================================
**
** During execution of a ccb by the script processor,
** the DSA (data structure address) register points
** to this substructure of the ccb.
** This substructure contains the header with
** the script-processor-changable data and
** data blocks for the indirect move commands.
**
**----------------------------------------------------------
*/
struct dsb {
/*
** Header.
*/
struct head header;
/*
** Table data for Script
*/
struct scr_tblsel select;
struct scr_tblmove smsg ;
struct scr_tblmove smsg_ext ;
struct scr_tblmove cmd ;
struct scr_tblmove sense ;
struct scr_tblmove wresid;
struct scr_tblmove data [MAX_SCATTER];
/*
** Phase mismatch contexts.
** We need two to handle correctly the
** SAVED DATA POINTER.
*/
struct pm_ctx pm0;
struct pm_ctx pm1;
};
/*========================================================================
**
** Declaration of structs: Command control block.
**
**========================================================================
*/
struct ccb {
/*----------------------------------------------------------------
** This is the data structure which is pointed by the DSA
** register when it is executed by the script processor.
** It must be the first entry.
**----------------------------------------------------------------
*/
struct dsb phys;
/*----------------------------------------------------------------
** The general SCSI driver provides a
** pointer to a control block.
**----------------------------------------------------------------
*/
Scsi_Cmnd *cmd; /* SCSI command */
u_char cdb_buf[16]; /* Copy of CDB */
u_char sense_buf[64];
int data_len; /* Total data length */
int segments; /* Number of SG segments */
/*----------------------------------------------------------------
** Message areas.
** We prepare a message to be sent after selection.
** We may use a second one if the command is rescheduled
** due to CHECK_CONDITION or QUEUE FULL status.
** Contents are IDENTIFY and SIMPLE_TAG.
** While negotiating sync or wide transfer,
** a SDTR or WDTR message is appended.
**----------------------------------------------------------------
*/
u_char scsi_smsg [12];
u_char scsi_smsg2[12];
/*----------------------------------------------------------------
** Miscellaneous status'.
**----------------------------------------------------------------
*/
u_char nego_status; /* Negotiation status */
u_char xerr_status; /* Extended error flags */
u_int32 extra_bytes; /* Extraneous bytes transferred */
/*----------------------------------------------------------------
** Saved info for auto-sense
**----------------------------------------------------------------
*/
u_char sv_scsi_status;
u_char sv_xerr_status;
/*----------------------------------------------------------------
** Other fields.
**----------------------------------------------------------------
*/
u_long p_ccb; /* BUS address of this CCB */
u_char sensecmd[6]; /* Sense command */
u_char to_abort; /* This CCB is to be aborted */
u_short tag; /* Tag for this transfer */
/* NO_TAG means no tag */
u_char tags_si; /* Lun tags sum index (0,1) */
u_char target;
u_char lun;
u_short queued;
ccb_p link_ccb; /* Host adapter CCB chain */
ccb_p link_ccbh; /* Host adapter CCB hash chain */
XPT_QUEHEAD link_ccbq; /* Link to unit CCB queue */
u_int32 startp; /* Initial data pointer */
u_int32 lastp0; /* Initial 'lastp' */
int ext_sg; /* Extreme data pointer, used */
int ext_ofs; /* to calculate the residual. */
int resid;
};
#define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl))
/*========================================================================
**
** Declaration of structs: NCR device descriptor
**
**========================================================================
*/
struct ncb {
/*----------------------------------------------------------------
** Idle task and invalid task actions and their bus
** addresses.
**----------------------------------------------------------------
*/
struct action idletask;
struct action notask;
struct action bad_i_t_l;
struct action bad_i_t_l_q;
u_long p_idletask;
u_long p_notask;
u_long p_bad_i_t_l;
u_long p_bad_i_t_l_q;
/*----------------------------------------------------------------
** Dummy lun table to protect us against target returning bad
** lun number on reselection.
**----------------------------------------------------------------
*/
u_int32 *badluntbl; /* Table physical address */
u_int32 resel_badlun; /* SCRIPT handler BUS address */
/*----------------------------------------------------------------
** Bit 32-63 of the on-chip RAM bus address in LE format.
** The START_RAM64 script loads the MMRS and MMWS from this
** field.
**----------------------------------------------------------------
*/
u_int32 scr_ram_seg;
/*----------------------------------------------------------------
** CCBs management queues.
**----------------------------------------------------------------
*/
Scsi_Cmnd *waiting_list; /* Commands waiting for a CCB */
/* when lcb is not allocated. */
Scsi_Cmnd *done_list; /* Commands waiting for done() */
/* callback to be invoked. */
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,93)
spinlock_t smp_lock; /* Lock for SMP threading */
#endif
/*----------------------------------------------------------------
** Chip and controller indentification.
**----------------------------------------------------------------
*/
int unit; /* Unit number */
char chip_name[8]; /* Chip name */
char inst_name[16]; /* ncb instance name */
/*----------------------------------------------------------------
** Initial value of some IO register bits.
** These values are assumed to have been set by BIOS, and may
** be used for probing adapter implementation differences.
**----------------------------------------------------------------
*/
u_char sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest3, sv_ctest4,
sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4, sv_stest1, sv_scntl4;
/*----------------------------------------------------------------
** Actual initial value of IO register bits used by the
** driver. They are loaded at initialisation according to
** features that are to be enabled.
**----------------------------------------------------------------
*/
u_char rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest3, rv_ctest4,
rv_ctest5, rv_stest2, rv_ccntl0, rv_ccntl1, rv_scntl4;
/*----------------------------------------------------------------
** Target data.
** Target control block bus address array used by the SCRIPT
** on reselection.
**----------------------------------------------------------------
*/
struct tcb target[MAX_TARGET];
u_int32 *targtbl;
/*----------------------------------------------------------------
** Virtual and physical bus addresses of the chip.
**----------------------------------------------------------------
*/
#ifndef SCSI_NCR_PCI_MEM_NOT_SUPPORTED
u_long base_va; /* MMIO base virtual address */
u_long base2_va; /* On-chip RAM virtual address */
#endif
u_long base_ba; /* MMIO base bus address */
u_long base_io; /* IO space base address */
u_long base_ws; /* (MM)IO window size */
u_long base2_ba; /* On-chip RAM bus address */
u_long base2_ws; /* On-chip RAM window size */
u_int irq; /* IRQ number */
volatile /* Pointer to volatile for */
struct ncr_reg *reg; /* memory mapped IO. */
/*----------------------------------------------------------------
** SCRIPTS virtual and physical bus addresses.
** 'script' is loaded in the on-chip RAM if present.
** 'scripth' stays in main memory for all chips except the
** 53C895A and 53C896 that provide 8K on-chip RAM.
**----------------------------------------------------------------
*/
struct script *script0; /* Copies of script and scripth */
struct scripth *scripth0; /* relocated for this ncb. */
u_long p_script; /* Actual script and scripth */
u_long p_scripth; /* bus addresses. */
u_long p_scripth0;
/*----------------------------------------------------------------
** General controller parameters and configuration.
**----------------------------------------------------------------
*/
pcidev_t pdev;
u_short device_id; /* PCI device id */
u_char revision_id; /* PCI device revision id */
u_char bus; /* PCI BUS number */
u_char device_fn; /* PCI BUS device and function */
u_char myaddr; /* SCSI id of the adapter */
u_char maxburst; /* log base 2 of dwords burst */
u_char maxwide; /* Maximum transfer width */
u_char minsync; /* Minimum sync period factor */
u_char maxsync; /* Maximum sync period factor */
u_char maxoffs; /* Max scsi offset */
u_char maxoffs_st; /* Max scsi offset in ST mode */
u_char multiplier; /* Clock multiplier (1,2,4) */
u_char clock_divn; /* Number of clock divisors */
u_long clock_khz; /* SCSI clock frequency in KHz */
u_int features; /* Chip features map */
/*----------------------------------------------------------------
** Range for the PCI clock frequency measurement result
** that ensures the algorithm used by the driver can be
** trusted for the SCSI clock frequency measurement.
** (Assuming a PCI clock frequency of 33 MHz).
**----------------------------------------------------------------
*/
u_int pciclock_min;
u_int pciclock_max;
/*----------------------------------------------------------------
** Start queue management.
** It is filled up by the host processor and accessed by the
** SCRIPTS processor in order to start SCSI commands.
**----------------------------------------------------------------
*/
u_long p_squeue; /* Start queue BUS address */
u_int32 *squeue; /* Start queue virtual address */
u_short squeueput; /* Next free slot of the queue */
u_short actccbs; /* Number of allocated CCBs */
u_short queuedepth; /* Start queue depth */
/*----------------------------------------------------------------
** Command completion queue.
** It is the same size as the start queue to avoid overflow.
**----------------------------------------------------------------
*/
u_short dqueueget; /* Next position to scan */
u_int32 *dqueue; /* Completion (done) queue */
/*----------------------------------------------------------------
** Timeout handler.
**----------------------------------------------------------------
*/
struct timer_list timer; /* Timer handler link header */
u_long lasttime;
u_long settle_time; /* Resetting the SCSI BUS */
/*----------------------------------------------------------------
** Debugging and profiling.
**----------------------------------------------------------------
*/
struct ncr_reg regdump; /* Register dump */
u_long regtime; /* Time it has been done */
/*----------------------------------------------------------------
** Miscellaneous buffers accessed by the scripts-processor.
** They shall be DWORD aligned, because they may be read or
** written with a script command.
**----------------------------------------------------------------
*/
u_char msgout[12]; /* Buffer for MESSAGE OUT */
u_char msgin [12]; /* Buffer for MESSAGE IN */
u_int32 lastmsg; /* Last SCSI message sent */
u_char scratch; /* Scratch for SCSI receive */
/*----------------------------------------------------------------
** Miscellaneous configuration and status parameters.
**----------------------------------------------------------------
*/
u_char scsi_mode; /* Current SCSI BUS mode */
u_char order; /* Tag order to use */
u_char verbose; /* Verbosity for this controller*/
u_int32 ncr_cache; /* Used for cache test at init. */
u_long p_ncb; /* BUS address of this NCB */
/*----------------------------------------------------------------
** CCB lists and queue.
**----------------------------------------------------------------
*/
ccb_p ccbh[CCB_HASH_SIZE]; /* CCB hashed by DSA value */
struct ccb *ccbc; /* CCB chain */
XPT_QUEHEAD free_ccbq; /* Queue of available CCBs */
/*----------------------------------------------------------------
** IMMEDIATE ARBITRATION (IARB) control.
** We keep track in 'last_cp' of the last CCB that has been
** queued to the SCRIPTS processor and clear 'last_cp' when
** this CCB completes. If last_cp is not zero at the moment
** we queue a new CCB, we set a flag in 'last_cp' that is
** used by the SCRIPTS as a hint for setting IARB.
** We donnot set more than 'iarb_max' consecutive hints for
** IARB in order to leave devices a chance to reselect.
** By the way, any non zero value of 'iarb_max' is unfair. :)
**----------------------------------------------------------------
*/
#ifdef SCSI_NCR_IARB_SUPPORT
struct ccb *last_cp; /* Last queud CCB used for IARB */
u_short iarb_max; /* Max. # consecutive IARB hints*/
u_short iarb_count; /* Actual # of these hints */
#endif
/*----------------------------------------------------------------
** We need the LCB in order to handle disconnections and
** to count active CCBs for task management. So, we use
** a unique CCB for LUNs we donnot have the LCB yet.
** This queue normally should have at most 1 element.
**----------------------------------------------------------------
*/
XPT_QUEHEAD b0_ccbq;
/*----------------------------------------------------------------
** We use a different scatter function for 896 rev 1.
**----------------------------------------------------------------
*/
int (*scatter) (ncb_p, ccb_p, Scsi_Cmnd *);
/*----------------------------------------------------------------
** Command abort handling.
** We need to synchronize tightly with the SCRIPTS
** processor in order to handle things correctly.
**----------------------------------------------------------------
*/
u_char abrt_msg[4]; /* Message to send buffer */
struct scr_tblmove abrt_tbl; /* Table for the MOV of it */
struct scr_tblsel abrt_sel; /* Sync params for selection */
u_char istat_sem; /* Tells the chip to stop (SEM) */
/*----------------------------------------------------------------
** Fields that should be removed or changed.
**----------------------------------------------------------------
*/
struct usrcmd user; /* Command from user */
volatile u_char release_stage; /* Synchronisation stage on release */
/*----------------------------------------------------------------
** Fields that are used (primarily) for integrity check
**----------------------------------------------------------------
*/
unsigned char check_integrity; /* Enable midlayer integ. check on
* bus scan. */
#ifdef SCSI_NCR_INTEGRITY_CHECKING
unsigned char check_integ_par; /* Set if par or Init. Det. error
* used only during integ check */
#endif
};
#define NCB_PHYS(np, lbl) (np->p_ncb + offsetof(struct ncb, lbl))
#define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl))
#define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth,lbl))
#define NCB_SCRIPTH0_PHYS(np,lbl) (np->p_scripth0+offsetof (struct scripth,lbl))
/*==========================================================
**
**
** Script for NCR-Processor.
**
** Use ncr_script_fill() to create the variable parts.
** Use ncr_script_copy_and_bind() to make a copy and
** bind to physical addresses.
**
**
**==========================================================
**
** We have to know the offsets of all labels before
** we reach them (for forward jumps).
** Therefore we declare a struct here.
** If you make changes inside the script,
** DONT FORGET TO CHANGE THE LENGTHS HERE!
**
**----------------------------------------------------------
*/
/*
** Script fragments which are loaded into the on-chip RAM
** of 825A, 875, 876, 895, 895A and 896 chips.
*/
struct script {
ncrcmd start [ 14];
ncrcmd getjob_begin [ 4];
ncrcmd getjob_end [ 4];
ncrcmd select [ 8];
ncrcmd wf_sel_done [ 2];
ncrcmd send_ident [ 2];
#ifdef SCSI_NCR_IARB_SUPPORT
ncrcmd select2 [ 8];
#else
ncrcmd select2 [ 2];
#endif
ncrcmd command [ 2];
ncrcmd dispatch [ 28];
ncrcmd sel_no_cmd [ 10];
ncrcmd init [ 6];
ncrcmd clrack [ 4];
ncrcmd disp_status [ 4];
ncrcmd datai_done [ 26];
ncrcmd datao_done [ 12];
ncrcmd ign_i_w_r_msg [ 4];
ncrcmd datai_phase [ 2];
ncrcmd datao_phase [ 4];
ncrcmd msg_in [ 2];
ncrcmd msg_in2 [ 10];
#ifdef SCSI_NCR_IARB_SUPPORT
ncrcmd status [ 14];
#else
ncrcmd status [ 10];
#endif
ncrcmd complete [ 8];
#ifdef SCSI_NCR_PCIQ_MAY_REORDER_WRITES
ncrcmd complete2 [ 12];
#else
ncrcmd complete2 [ 10];
#endif
#ifdef SCSI_NCR_PCIQ_SYNC_ON_INTR
ncrcmd done [ 18];
#else
ncrcmd done [ 14];
#endif
ncrcmd done_end [ 2];
ncrcmd save_dp [ 8];
ncrcmd restore_dp [ 4];
ncrcmd disconnect [ 20];
#ifdef SCSI_NCR_IARB_SUPPORT
ncrcmd idle [ 4];
#else
ncrcmd idle [ 2];
#endif
#ifdef SCSI_NCR_IARB_SUPPORT
ncrcmd ungetjob [ 6];
#else
ncrcmd ungetjob [ 4];
#endif
ncrcmd reselect [ 4];
ncrcmd reselected [ 20];
ncrcmd resel_scntl4 [ 30];
#if MAX_TASKS*4 > 512
ncrcmd resel_tag [ 18];
#elif MAX_TASKS*4 > 256
ncrcmd resel_tag [ 12];
#else
ncrcmd resel_tag [ 8];
#endif
ncrcmd resel_go [ 6];
ncrcmd resel_notag [ 2];
ncrcmd resel_dsa [ 8];
ncrcmd data_in [MAX_SCATTER * SCR_SG_SIZE];
ncrcmd data_in2 [ 4];
ncrcmd data_out [MAX_SCATTER * SCR_SG_SIZE];
ncrcmd data_out2 [ 4];
ncrcmd pm0_data [ 12];
ncrcmd pm0_data_out [ 6];
ncrcmd pm0_data_end [ 6];
ncrcmd pm1_data [ 12];
ncrcmd pm1_data_out [ 6];
ncrcmd pm1_data_end [ 6];
};
/*
** Script fragments which stay in main memory for all chips
** except for the 895A and 896 that support 8K on-chip RAM.
*/
struct scripth {
ncrcmd start64 [ 2];
ncrcmd no_data [ 2];
ncrcmd sel_for_abort [ 18];
ncrcmd sel_for_abort_1 [ 2];
ncrcmd select_no_atn [ 8];
ncrcmd wf_sel_done_no_atn [ 4];
ncrcmd msg_in_etc [ 14];
ncrcmd msg_received [ 4];
ncrcmd msg_weird_seen [ 4];
ncrcmd msg_extended [ 20];
ncrcmd msg_bad [ 6];
ncrcmd msg_weird [ 4];
ncrcmd msg_weird1 [ 8];
ncrcmd wdtr_resp [ 6];
ncrcmd send_wdtr [ 4];
ncrcmd sdtr_resp [ 6];
ncrcmd send_sdtr [ 4];
ncrcmd ppr_resp [ 6];
ncrcmd send_ppr [ 4];
ncrcmd nego_bad_phase [ 4];
ncrcmd msg_out [ 4];
ncrcmd msg_out_done [ 4];
ncrcmd data_ovrun [ 2];
ncrcmd data_ovrun1 [ 22];
ncrcmd data_ovrun2 [ 8];
ncrcmd abort_resel [ 16];
ncrcmd resend_ident [ 4];
ncrcmd ident_break [ 4];
ncrcmd ident_break_atn [ 4];
ncrcmd sdata_in [ 6];
ncrcmd data_io [ 2];
ncrcmd data_io_com [ 8];
ncrcmd data_io_out [ 12];
ncrcmd resel_bad_lun [ 4];
ncrcmd bad_i_t_l [ 4];
ncrcmd bad_i_t_l_q [ 4];
ncrcmd bad_status [ 6];
ncrcmd tweak_pmj [ 12];
ncrcmd pm_handle [ 20];
ncrcmd pm_handle1 [ 4];
ncrcmd pm_save [ 4];
ncrcmd pm0_save [ 14];
ncrcmd pm1_save [ 14];
/* WSR handling */
#ifdef SYM_DEBUG_PM_WITH_WSR
ncrcmd pm_wsr_handle [ 44];
#else
ncrcmd pm_wsr_handle [ 42];
#endif
ncrcmd wsr_ma_helper [ 4];
/* Data area */
ncrcmd zero [ 1];
ncrcmd scratch [ 1];
ncrcmd scratch1 [ 1];
ncrcmd pm0_data_addr [ 1];
ncrcmd pm1_data_addr [ 1];
ncrcmd saved_dsa [ 1];
ncrcmd saved_drs [ 1];
ncrcmd done_pos [ 1];
ncrcmd startpos [ 1];
ncrcmd targtbl [ 1];
/* End of data area */
#ifdef SCSI_NCR_PCI_MEM_NOT_SUPPORTED
ncrcmd start_ram [ 1];
ncrcmd script0_ba [ 4];
ncrcmd start_ram64 [ 3];
ncrcmd script0_ba64 [ 3];
ncrcmd scripth0_ba64 [ 6];
ncrcmd ram_seg64 [ 1];
#endif
ncrcmd snooptest [ 6];
ncrcmd snoopend [ 2];
};
/*==========================================================
**
**
** Function headers.
**
**
**==========================================================
*/
static ccb_p ncr_alloc_ccb (ncb_p np);
static void ncr_complete (ncb_p np, ccb_p cp);
static void ncr_exception (ncb_p np);
static void ncr_free_ccb (ncb_p np, ccb_p cp);
static ccb_p ncr_ccb_from_dsa(ncb_p np, u_long dsa);
static void ncr_init_tcb (ncb_p np, u_char tn);
static lcb_p ncr_alloc_lcb (ncb_p np, u_char tn, u_char ln);
static lcb_p ncr_setup_lcb (ncb_p np, u_char tn, u_char ln,
u_char *inq_data);
static void ncr_getclock (ncb_p np, int mult);
static u_int ncr_getpciclock (ncb_p np);
static void ncr_selectclock (ncb_p np, u_char scntl3);
static ccb_p ncr_get_ccb (ncb_p np, u_char tn, u_char ln);
static void ncr_init (ncb_p np, int reset, char * msg, u_long code);
static void ncr_int_sbmc (ncb_p np);
static void ncr_int_par (ncb_p np, u_short sist);
static void ncr_int_ma (ncb_p np);
static void ncr_int_sir (ncb_p np);
static void ncr_int_sto (ncb_p np);
static void ncr_int_udc (ncb_p np);
static void ncr_negotiate (ncb_p np, tcb_p tp);
static int ncr_prepare_nego(ncb_p np, ccb_p cp, u_char *msgptr);
#ifdef SCSI_NCR_INTEGRITY_CHECKING
static int ncr_ic_nego(ncb_p np, ccb_p cp, Scsi_Cmnd *cmd, u_char *msgptr);
#endif
static void ncr_script_copy_and_bind
(ncb_p np, ncrcmd *src, ncrcmd *dst, int len);
static void ncr_script_fill (struct script * scr, struct scripth * scripth);
static int ncr_scatter_896R1 (ncb_p np, ccb_p cp, Scsi_Cmnd *cmd);
static int ncr_scatter (ncb_p np, ccb_p cp, Scsi_Cmnd *cmd);
static void ncr_getsync (ncb_p np, u_char sfac, u_char *fakp, u_char *scntl3p);
static void ncr_get_xfer_info(ncb_p np, tcb_p tp, u_char *factor, u_char *offset, u_char *width);
static void ncr_setsync (ncb_p np, ccb_p cp, u_char scntl3, u_char sxfer, u_char scntl4);
static void ncr_set_sync_wide_status (ncb_p np, u_char target);
static void ncr_setup_tags (ncb_p np, u_char tn, u_char ln);
static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide, u_char ack);
static void ncr_setsyncwide (ncb_p np, ccb_p cp, u_char scntl3, u_char sxfer, u_char scntl4, u_char wide);
static int ncr_show_msg (u_char * msg);
static void ncr_print_msg (ccb_p cp, char *label, u_char * msg);
static int ncr_snooptest (ncb_p np);
static void ncr_timeout (ncb_p np);
static void ncr_wakeup (ncb_p np, u_long code);
static int ncr_wakeup_done (ncb_p np);
static void ncr_start_next_ccb (ncb_p np, lcb_p lp, int maxn);
static void ncr_put_start_queue(ncb_p np, ccb_p cp);
static void ncr_chip_reset (ncb_p np);
static void ncr_soft_reset (ncb_p np);
static void ncr_start_reset (ncb_p np);
static int ncr_reset_scsi_bus (ncb_p np, int enab_int, int settle_delay);
static int ncr_compute_residual (ncb_p np, ccb_p cp);
#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
static void ncr_usercmd (ncb_p np);
#endif
static int ncr_attach (Scsi_Host_Template *tpnt, int unit, ncr_device *device);
static void ncr_free_resources(ncb_p np);
static void insert_into_waiting_list(ncb_p np, Scsi_Cmnd *cmd);
static Scsi_Cmnd *retrieve_from_waiting_list(int to_remove, ncb_p np, Scsi_Cmnd *cmd);
static void process_waiting_list(ncb_p np, int sts);
#define remove_from_waiting_list(np, cmd) \
retrieve_from_waiting_list(1, (np), (cmd))
#define requeue_waiting_list(np) process_waiting_list((np), DID_OK)
#define reset_waiting_list(np) process_waiting_list((np), DID_RESET)
#ifdef SCSI_NCR_NVRAM_SUPPORT
static void ncr_get_nvram (ncr_device *devp, ncr_nvram *nvp);
static int sym_read_Tekram_nvram (ncr_slot *np, u_short device_id,
Tekram_nvram *nvram);
static int sym_read_Symbios_nvram (ncr_slot *np, Symbios_nvram *nvram);
#endif
/*==========================================================
**
**
** Global static data.
**
**
**==========================================================
*/
static inline char *ncr_name (ncb_p np)
{
return np->inst_name;
}
/*==========================================================
**
**
** Scripts for NCR-Processor.
**
** Use ncr_script_bind for binding to physical addresses.
**
**
**==========================================================
**
** NADDR generates a reference to a field of the controller data.
** PADDR generates a reference to another part of the script.
** RADDR generates a reference to a script processor register.
** FADDR generates a reference to a script processor register
** with offset.
**
**----------------------------------------------------------
*/
#define RELOC_SOFTC 0x40000000
#define RELOC_LABEL 0x50000000
#define RELOC_REGISTER 0x60000000
#if 0
#define RELOC_KVAR 0x70000000
#endif
#define RELOC_LABELH 0x80000000
#define RELOC_MASK 0xf0000000
#define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label))
#define PADDR(label) (RELOC_LABEL | offsetof(struct script, label))
#define PADDRH(label) (RELOC_LABELH | offsetof(struct scripth, label))
#define RADDR(label) (RELOC_REGISTER | REG(label))
#define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
#define KVAR(which) (RELOC_KVAR | (which))
#define SCR_DATA_ZERO 0xf00ff00f
#ifdef RELOC_KVAR
#define SCRIPT_KVAR_JIFFIES (0)
#define SCRIPT_KVAR_FIRST SCRIPT_KVAR_JIFFIES
#define SCRIPT_KVAR_LAST SCRIPT_KVAR_JIFFIES
/*
* Kernel variables referenced in the scripts.
* THESE MUST ALL BE ALIGNED TO A 4-BYTE BOUNDARY.
*/
static void *script_kvars[] __initdata =
{ (void *)&jiffies };
#endif
static struct script script0 __initdata = {
/*--------------------------< START >-----------------------*/ {
/*
** This NOP will be patched with LED ON
** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
*/
SCR_NO_OP,
0,
/*
** Clear SIGP.
*/
SCR_FROM_REG (ctest2),
0,
/*
** Stop here if the C code wants to perform
** some error recovery procedure manually.
** (Indicate this by setting SEM in ISTAT)
*/
SCR_FROM_REG (istat),
0,
/*
** Report to the C code the next position in
** the start queue the SCRIPTS will schedule.
** The C code must not change SCRATCHA.
*/
SCR_LOAD_ABS (scratcha, 4),
PADDRH (startpos),
SCR_INT ^ IFTRUE (MASK (SEM, SEM)),
SIR_SCRIPT_STOPPED,
/*
** Start the next job.
**
** @DSA = start point for this job.
** SCRATCHA = address of this job in the start queue.
**
** We will restore startpos with SCRATCHA if we fails the
** arbitration or if it is the idle job.
**
** The below GETJOB_BEGIN to GETJOB_END section of SCRIPTS
** is a critical path. If it is partially executed, it then
** may happen that the job address is not yet in the DSA
** and the next queue position points to the next JOB.
*/
SCR_LOAD_ABS (dsa, 4),
PADDRH (startpos),
SCR_LOAD_REL (temp, 4),
4,
}/*-------------------------< GETJOB_BEGIN >------------------*/,{
SCR_STORE_ABS (temp, 4),
PADDRH (startpos),
SCR_LOAD_REL (dsa, 4),
0,
}/*-------------------------< GETJOB_END >--------------------*/,{
SCR_LOAD_REL (temp, 4),
0,
SCR_RETURN,
0,
}/*-------------------------< SELECT >----------------------*/,{
/*
** DSA contains the address of a scheduled
** data structure.
**
** SCRATCHA contains the address of the start queue
** entry which points to the next job.
**
** Set Initiator mode.
**
** (Target mode is left as an exercise for the reader)
*/
SCR_CLR (SCR_TRG),
0,
/*
** And try to select this target.
*/
SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
PADDR (ungetjob),
/*
** Now there are 4 possibilities:
**
** (1) The ncr loses arbitration.
** This is ok, because it will try again,
** when the bus becomes idle.
** (But beware of the timeout function!)
**
** (2) The ncr is reselected.
** Then the script processor takes the jump
** to the RESELECT label.
**
** (3) The ncr wins arbitration.
** Then it will execute SCRIPTS instruction until
** the next instruction that checks SCSI phase.
** Then will stop and wait for selection to be
** complete or selection time-out to occur.
**
** After having won arbitration, the ncr SCRIPTS
** processor is able to execute instructions while
** the SCSI core is performing SCSI selection. But
** some script instruction that is not waiting for
** a valid phase (or selection timeout) to occur
** breaks the selection procedure, by probably
** affecting timing requirements.
** So we have to wait immediately for the next phase
** or the selection to complete or time-out.
*/
/*
** load the savep (saved pointer) into
** the actual data pointer.
*/
SCR_LOAD_REL (temp, 4),
offsetof (struct ccb, phys.header.savep),
/*
** Initialize the status registers
*/
SCR_LOAD_REL (scr0, 4),
offsetof (struct ccb, phys.header.status),
}/*-------------------------< WF_SEL_DONE >----------------------*/,{
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)),
SIR_SEL_ATN_NO_MSG_OUT,
}/*-------------------------< SEND_IDENT >----------------------*/,{
/*
** Selection complete.
** Send the IDENTIFY and SIMPLE_TAG messages
** (and the M_X_SYNC_REQ / M_X_WIDE_REQ message)
*/
SCR_MOVE_TBL ^ SCR_MSG_OUT,
offsetof (struct dsb, smsg),
}/*-------------------------< SELECT2 >----------------------*/,{
#ifdef SCSI_NCR_IARB_SUPPORT
/*
** Set IMMEDIATE ARBITRATION if we have been given
** a hint to do so. (Some job to do after this one).
*/
SCR_FROM_REG (HF_REG),
0,
SCR_JUMPR ^ IFFALSE (MASK (HF_HINT_IARB, HF_HINT_IARB)),
8,
SCR_REG_REG (scntl1, SCR_OR, IARB),
0,
#endif
/*
** Anticipate the COMMAND phase.
** This is the PHASE we expect at this point.
*/
SCR_JUMP ^ IFFALSE (WHEN (SCR_COMMAND)),
PADDR (sel_no_cmd),
}/*-------------------------< COMMAND >--------------------*/,{
/*
** ... and send the command
*/
SCR_MOVE_TBL ^ SCR_COMMAND,
offsetof (struct dsb, cmd),
}/*-----------------------< DISPATCH >----------------------*/,{
/*
** MSG_IN is the only phase that shall be
** entered at least once for each (re)selection.
** So we test it first.
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
PADDR (msg_in),
SCR_JUMP ^ IFTRUE (IF (SCR_DATA_OUT)),
PADDR (datao_phase),
SCR_JUMP ^ IFTRUE (IF (SCR_DATA_IN)),
PADDR (datai_phase),
SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
PADDR (status),
SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
PADDR (command),
SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
PADDRH (msg_out),
/*
* Discard as many illegal phases as
* required and tell the C code about.
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_ILG_OUT)),
16,
SCR_MOVE_ABS (1) ^ SCR_ILG_OUT,
NADDR (scratch),
SCR_JUMPR ^ IFTRUE (WHEN (SCR_ILG_OUT)),
-16,
SCR_JUMPR ^ IFFALSE (WHEN (SCR_ILG_IN)),
16,
SCR_MOVE_ABS (1) ^ SCR_ILG_IN,
NADDR (scratch),
SCR_JUMPR ^ IFTRUE (WHEN (SCR_ILG_IN)),
-16,
SCR_INT,
SIR_BAD_PHASE,
SCR_JUMP,
PADDR (dispatch),
}/*---------------------< SEL_NO_CMD >----------------------*/,{
/*
** The target does not switch to command
** phase after IDENTIFY has been sent.
**
** If it stays in MSG OUT phase send it
** the IDENTIFY again.
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
PADDRH (resend_ident),
/*
** If target does not switch to MSG IN phase
** and we sent a negotiation, assert the
** failure immediately.
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
PADDR (dispatch),
SCR_FROM_REG (HS_REG),
0,
SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
SIR_NEGO_FAILED,
/*
** Jump to dispatcher.
*/
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< INIT >------------------------*/,{
/*
** Wait for the SCSI RESET signal to be
** inactive before restarting operations,
** since the chip may hang on SEL_ATN
** if SCSI RESET is active.
*/
SCR_FROM_REG (sstat0),
0,
SCR_JUMPR ^ IFTRUE (MASK (IRST, IRST)),
-16,
SCR_JUMP,
PADDR (start),
}/*-------------------------< CLRACK >----------------------*/,{
/*
** Terminate possible pending message phase.
*/
SCR_CLR (SCR_ACK),
0,
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< DISP_STATUS >----------------------*/,{
/*
** Anticipate STATUS phase.
**
** Does spare 3 SCRIPTS instructions when we have
** completed the INPUT of the data.
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)),
PADDR (status),
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< DATAI_DONE >-------------------*/,{
/*
* If the device wants us to send more data,
* we must count the extra bytes.
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_DATA_IN)),
PADDRH (data_ovrun),
/*
** If the SWIDE is not full, jump to dispatcher.
** We anticipate a STATUS phase.
** If we get later an IGNORE WIDE RESIDUE, we
** will alias it as a MODIFY DP (-1).
*/
SCR_FROM_REG (scntl2),
0,
SCR_JUMP ^ IFFALSE (MASK (WSR, WSR)),
PADDR (disp_status),
/*
** The SWIDE is full.
** Clear this condition.
*/
SCR_REG_REG (scntl2, SCR_OR, WSR),
0,
/*
* We are expecting an IGNORE RESIDUE message
* from the device, otherwise we are in data
* overrun condition. Check against MSG_IN phase.
*/
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_IN)),
SIR_SWIDE_OVERRUN,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR (disp_status),
/*
* We are in MSG_IN phase,
* Read the first byte of the message.
* If it is not an IGNORE RESIDUE message,
* signal overrun and jump to message
* processing.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[0]),
SCR_INT ^ IFFALSE (DATA (M_IGN_RESIDUE)),
SIR_SWIDE_OVERRUN,
SCR_JUMP ^ IFFALSE (DATA (M_IGN_RESIDUE)),
PADDR (msg_in2),
/*
* We got the message we expected.
* Read the 2nd byte, and jump to dispatcher.
*/
SCR_CLR (SCR_ACK),
0,
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[1]),
SCR_CLR (SCR_ACK),
0,
SCR_JUMP,
PADDR (disp_status),
}/*-------------------------< DATAO_DONE >-------------------*/,{
/*
* If the device wants us to send more data,
* we must count the extra bytes.
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_DATA_OUT)),
PADDRH (data_ovrun),
/*
** If the SODL is not full jump to dispatcher.
** We anticipate a MSG IN phase or a STATUS phase.
*/
SCR_FROM_REG (scntl2),
0,
SCR_JUMP ^ IFFALSE (MASK (WSS, WSS)),
PADDR (disp_status),
/*
** The SODL is full, clear this condition.
*/
SCR_REG_REG (scntl2, SCR_OR, WSS),
0,
/*
** And signal a DATA UNDERRUN condition
** to the C code.
*/
SCR_INT,
SIR_SODL_UNDERRUN,
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< IGN_I_W_R_MSG >--------------*/,{
/*
** We jump here from the phase mismatch interrupt,
** When we have a SWIDE and the device has presented
** a IGNORE WIDE RESIDUE message on the BUS.
** We just have to throw away this message and then
** to jump to dispatcher.
*/
SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
NADDR (scratch),
/*
** Clear ACK and jump to dispatcher.
*/
SCR_JUMP,
PADDR (clrack),
}/*-------------------------< DATAI_PHASE >------------------*/,{
SCR_RETURN,
0,
}/*-------------------------< DATAO_PHASE >------------------*/,{
/*
** Patch for 53c1010_66 only - to allow A0 part
** to operate properly in a 33MHz PCI bus.
**
** SCR_REG_REG(scntl4, SCR_OR, 0x0c),
** 0,
*/
SCR_NO_OP,
0,
SCR_RETURN,
0,
}/*-------------------------< MSG_IN >--------------------*/,{
/*
** Get the first byte of the message.
**
** The script processor doesn't negate the
** ACK signal after this transfer.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[0]),
}/*-------------------------< MSG_IN2 >--------------------*/,{
/*
** Check first against 1 byte messages
** that we handle from SCRIPTS.
*/
SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)),
PADDR (complete),
SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)),
PADDR (disconnect),
SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)),
PADDR (save_dp),
SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)),
PADDR (restore_dp),
/*
** We handle all other messages from the
** C code, so no need to waste on-chip RAM
** for those ones.
*/
SCR_JUMP,
PADDRH (msg_in_etc),
}/*-------------------------< STATUS >--------------------*/,{
/*
** get the status
*/
SCR_MOVE_ABS (1) ^ SCR_STATUS,
NADDR (scratch),
#ifdef SCSI_NCR_IARB_SUPPORT
/*
** If STATUS is not GOOD, clear IMMEDIATE ARBITRATION,
** since we may have to tamper the start queue from
** the C code.
*/
SCR_JUMPR ^ IFTRUE (DATA (S_GOOD)),
8,
SCR_REG_REG (scntl1, SCR_AND, ~IARB),
0,
#endif
/*
** save status to scsi_status.
** mark as complete.
*/
SCR_TO_REG (SS_REG),
0,
SCR_LOAD_REG (HS_REG, HS_COMPLETE),
0,
/*
** Anticipate the MESSAGE PHASE for
** the TASK COMPLETE message.
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
PADDR (msg_in),
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< COMPLETE >-----------------*/,{
/*
** Complete message.
**
** Copy the data pointer to LASTP in header.
*/
SCR_STORE_REL (temp, 4),
offsetof (struct ccb, phys.header.lastp),
/*
** When we terminate the cycle by clearing ACK,
** the target may disconnect immediately.
**
** We don't want to be told of an
** "unexpected disconnect",
** so we disable this feature.
*/
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
0,
/*
** Terminate cycle ...
*/
SCR_CLR (SCR_ACK|SCR_ATN),
0,
/*
** ... and wait for the disconnect.
*/
SCR_WAIT_DISC,
0,
}/*-------------------------< COMPLETE2 >-----------------*/,{
/*
** Save host status to header.
*/
SCR_STORE_REL (scr0, 4),
offsetof (struct ccb, phys.header.status),
#ifdef SCSI_NCR_PCIQ_MAY_REORDER_WRITES
/*
** Some bridges may reorder DMA writes to memory.
** We donnot want the CPU to deal with completions
** without all the posted write having been flushed
** to memory. This DUMMY READ should flush posted
** buffers prior to the CPU having to deal with
** completions.
*/
SCR_LOAD_REL (scr0, 4), /* DUMMY READ */
offsetof (struct ccb, phys.header.status),
#endif
/*
** If command resulted in not GOOD status,
** call the C code if needed.
*/
SCR_FROM_REG (SS_REG),
0,
SCR_CALL ^ IFFALSE (DATA (S_GOOD)),
PADDRH (bad_status),
/*
** If we performed an auto-sense, call
** the C code to synchronyze task aborts
** with UNIT ATTENTION conditions.
*/
SCR_FROM_REG (HF_REG),
0,
SCR_INT ^ IFTRUE (MASK (HF_AUTO_SENSE, HF_AUTO_SENSE)),
SIR_AUTO_SENSE_DONE,
}/*------------------------< DONE >-----------------*/,{
#ifdef SCSI_NCR_PCIQ_SYNC_ON_INTR
/*
** It seems that some bridges flush everything
** when the INTR line is raised. For these ones,
** we can just ensure that the INTR line will be
** raised before each completion. So, if it happens
** that we have been faster that the CPU, we just
** have to synchronize with it. A dummy programmed
** interrupt will do the trick.
** Note that we overlap at most 1 IO with the CPU
** in this situation and that the IRQ line must not
** be shared.
*/
SCR_FROM_REG (istat),
0,
SCR_INT ^ IFTRUE (MASK (INTF, INTF)),
SIR_DUMMY_INTERRUPT,
#endif
/*
** Copy the DSA to the DONE QUEUE and
** signal completion to the host.
** If we are interrupted between DONE
** and DONE_END, we must reset, otherwise
** the completed CCB will be lost.
*/
SCR_STORE_ABS (dsa, 4),
PADDRH (saved_dsa),
SCR_LOAD_ABS (dsa, 4),
PADDRH (done_pos),
SCR_LOAD_ABS (scratcha, 4),
PADDRH (saved_dsa),
SCR_STORE_REL (scratcha, 4),
0,
/*
** The instruction below reads the DONE QUEUE next
** free position from memory.
** In addition it ensures that all PCI posted writes
** are flushed and so the DSA value of the done
** CCB is visible by the CPU before INTFLY is raised.
*/
SCR_LOAD_REL (temp, 4),
4,
SCR_INT_FLY,
0,
SCR_STORE_ABS (temp, 4),
PADDRH (done_pos),
}/*------------------------< DONE_END >-----------------*/,{
SCR_JUMP,
PADDR (start),
}/*-------------------------< SAVE_DP >------------------*/,{
/*
** Clear ACK immediately.
** No need to delay it.
*/
SCR_CLR (SCR_ACK),
0,
/*
** Keep track we received a SAVE DP, so
** we will switch to the other PM context
** on the next PM since the DP may point
** to the current PM context.
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_DP_SAVED),
0,
/*
** SAVE_DP message:
** Copy the data pointer to SAVEP in header.
*/
SCR_STORE_REL (temp, 4),
offsetof (struct ccb, phys.header.savep),
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< RESTORE_DP >---------------*/,{
/*
** RESTORE_DP message:
** Copy SAVEP in header to actual data pointer.
*/
SCR_LOAD_REL (temp, 4),
offsetof (struct ccb, phys.header.savep),
SCR_JUMP,
PADDR (clrack),
}/*-------------------------< DISCONNECT >---------------*/,{
/*
** DISCONNECTing ...
**
** disable the "unexpected disconnect" feature,
** and remove the ACK signal.
*/
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
0,
SCR_CLR (SCR_ACK|SCR_ATN),
0,
/*
** Wait for the disconnect.
*/
SCR_WAIT_DISC,
0,
/*
** Status is: DISCONNECTED.
*/
SCR_LOAD_REG (HS_REG, HS_DISCONNECT),
0,
/*
** Save host status to header.
*/
SCR_STORE_REL (scr0, 4),
offsetof (struct ccb, phys.header.status),
/*
** If QUIRK_AUTOSAVE is set,
** do an "save pointer" operation.
*/
SCR_FROM_REG (QU_REG),
0,
SCR_JUMP ^ IFFALSE (MASK (QUIRK_AUTOSAVE, QUIRK_AUTOSAVE)),
PADDR (start),
/*
** like SAVE_DP message:
** Remember we saved the data pointer.
** Copy data pointer to SAVEP in header.
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_DP_SAVED),
0,
SCR_STORE_REL (temp, 4),
offsetof (struct ccb, phys.header.savep),
SCR_JUMP,
PADDR (start),
}/*-------------------------< IDLE >------------------------*/,{
/*
** Nothing to do?
** Wait for reselect.
** This NOP will be patched with LED OFF
** SCR_REG_REG (gpreg, SCR_OR, 0x01)
*/
SCR_NO_OP,
0,
#ifdef SCSI_NCR_IARB_SUPPORT
SCR_JUMPR,
8,
#endif
}/*-------------------------< UNGETJOB >-----------------*/,{
#ifdef SCSI_NCR_IARB_SUPPORT
/*
** Set IMMEDIATE ARBITRATION, for the next time.
** This will give us better chance to win arbitration
** for the job we just wanted to do.
*/
SCR_REG_REG (scntl1, SCR_OR, IARB),
0,
#endif
/*
** We are not able to restart the SCRIPTS if we are
** interrupted and these instruction haven't been
** all executed. BTW, this is very unlikely to
** happen, but we check that from the C code.
*/
SCR_LOAD_REG (dsa, 0xff),
0,
SCR_STORE_ABS (scratcha, 4),
PADDRH (startpos),
}/*-------------------------< RESELECT >--------------------*/,{
/*
** make the host status invalid.
*/
SCR_CLR (SCR_TRG),
0,
/*
** Sleep waiting for a reselection.
** If SIGP is set, special treatment.
**
** Zu allem bereit ..
*/
SCR_WAIT_RESEL,
PADDR(start),
}/*-------------------------< RESELECTED >------------------*/,{
/*
** This NOP will be patched with LED ON
** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
*/
SCR_NO_OP,
0,
/*
** load the target id into the sdid
*/
SCR_REG_SFBR (ssid, SCR_AND, 0x8F),
0,
SCR_TO_REG (sdid),
0,
/*
** load the target control block address
*/
SCR_LOAD_ABS (dsa, 4),
PADDRH (targtbl),
SCR_SFBR_REG (dsa, SCR_SHL, 0),
0,
SCR_REG_REG (dsa, SCR_SHL, 0),
0,
SCR_REG_REG (dsa, SCR_AND, 0x3c),
0,
SCR_LOAD_REL (dsa, 4),
0,
/*
** Load the synchronous transfer registers.
*/
SCR_LOAD_REL (scntl3, 1),
offsetof(struct tcb, wval),
SCR_LOAD_REL (sxfer, 1),
offsetof(struct tcb, sval),
}/*-------------------------< RESEL_SCNTL4 >------------------*/,{
/*
** Write with uval value. Patch if device
** does not support Ultra3.
**
** SCR_LOAD_REL (scntl4, 1),
** offsetof(struct tcb, uval),
*/
SCR_NO_OP,
0,
/*
* We expect MESSAGE IN phase.
* If not, get help from the C code.
*/
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_IN)),
SIR_RESEL_NO_MSG_IN,
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin),
/*
* If IDENTIFY LUN #0, use a faster path
* to find the LCB structure.
*/
SCR_JUMPR ^ IFTRUE (MASK (0x80, 0xbf)),
56,
/*
* If message isn't an IDENTIFY,
* tell the C code about.
*/
SCR_INT ^ IFFALSE (MASK (0x80, 0x80)),
SIR_RESEL_NO_IDENTIFY,
/*
* It is an IDENTIFY message,
* Load the LUN control block address.
*/
SCR_LOAD_REL (dsa, 4),
offsetof(struct tcb, b_luntbl),
SCR_SFBR_REG (dsa, SCR_SHL, 0),
0,
SCR_REG_REG (dsa, SCR_SHL, 0),
0,
SCR_REG_REG (dsa, SCR_AND, 0xfc),
0,
SCR_LOAD_REL (dsa, 4),
0,
SCR_JUMPR,
8,
/*
** LUN 0 special case (but usual one :))
*/
SCR_LOAD_REL (dsa, 4),
offsetof(struct tcb, b_lun0),
/*
** Load the reselect task action for this LUN.
** Load the tasks DSA array for this LUN.
** Call the action.
*/
SCR_LOAD_REL (temp, 4),
offsetof(struct lcb, resel_task),
SCR_LOAD_REL (dsa, 4),
offsetof(struct lcb, b_tasktbl),
SCR_RETURN,
0,
}/*-------------------------< RESEL_TAG >-------------------*/,{
/*
** ACK the IDENTIFY or TAG previously received
*/
SCR_CLR (SCR_ACK),
0,
/*
** Read IDENTIFY + SIMPLE + TAG using a single MOVE.
** Agressive optimization, is'nt it?
** No need to test the SIMPLE TAG message, since the
** driver only supports conformant devices for tags. ;-)
*/
SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
NADDR (msgin),
/*
** Read the TAG from the SIDL.
** Still an aggressive optimization. ;-)
** Compute the CCB indirect jump address which
** is (#TAG*2 & 0xfc) due to tag numbering using
** 1,3,5..MAXTAGS*2+1 actual values.
*/
SCR_REG_SFBR (sidl, SCR_SHL, 0),
0,
#if MAX_TASKS*4 > 512
SCR_JUMPR ^ IFFALSE (CARRYSET),
8,
SCR_REG_REG (dsa1, SCR_OR, 2),
0,
SCR_REG_REG (sfbr, SCR_SHL, 0),
0,
SCR_JUMPR ^ IFFALSE (CARRYSET),
8,
SCR_REG_REG (dsa1, SCR_OR, 1),
0,
#elif MAX_TASKS*4 > 256
SCR_JUMPR ^ IFFALSE (CARRYSET),
8,
SCR_REG_REG (dsa1, SCR_OR, 1),
0,
#endif
/*
** Retrieve the DSA of this task.
** JUMP indirectly to the restart point of the CCB.
*/
SCR_SFBR_REG (dsa, SCR_AND, 0xfc),
0,
}/*-------------------------< RESEL_GO >-------------------*/,{
SCR_LOAD_REL (dsa, 4),
0,
SCR_LOAD_REL (temp, 4),
offsetof(struct ccb, phys.header.go.restart),
SCR_RETURN,
0,
/* In normal situations we branch to RESEL_DSA */
}/*-------------------------< RESEL_NOTAG >-------------------*/,{
/*
** JUMP indirectly to the restart point of the CCB.
*/
SCR_JUMP,
PADDR (resel_go),
}/*-------------------------< RESEL_DSA >-------------------*/,{
/*
** Ack the IDENTIFY or TAG previously received.
*/
SCR_CLR (SCR_ACK),
0,
/*
** load the savep (saved pointer) into
** the actual data pointer.
*/
SCR_LOAD_REL (temp, 4),
offsetof (struct ccb, phys.header.savep),
/*
** Initialize the status registers
*/
SCR_LOAD_REL (scr0, 4),
offsetof (struct ccb, phys.header.status),
/*
** Jump to dispatcher.
*/
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< DATA_IN >--------------------*/,{
/*
** Because the size depends on the
** #define MAX_SCATTER parameter,
** it is filled in at runtime.
**
** ##===========< i=0; i<MAX_SCATTER >=========
** || SCR_CHMOV_TBL ^ SCR_DATA_IN,
** || offsetof (struct dsb, data[ i]),
** ##==========================================
**
**---------------------------------------------------------
*/
0
}/*-------------------------< DATA_IN2 >-------------------*/,{
SCR_CALL,
PADDR (datai_done),
SCR_JUMP,
PADDRH (data_ovrun),
}/*-------------------------< DATA_OUT >--------------------*/,{
/*
** Because the size depends on the
** #define MAX_SCATTER parameter,
** it is filled in at runtime.
**
** ##===========< i=0; i<MAX_SCATTER >=========
** || SCR_CHMOV_TBL ^ SCR_DATA_OUT,
** || offsetof (struct dsb, data[ i]),
** ##==========================================
**
**---------------------------------------------------------
*/
0
}/*-------------------------< DATA_OUT2 >-------------------*/,{
SCR_CALL,
PADDR (datao_done),
SCR_JUMP,
PADDRH (data_ovrun),
}/*-------------------------< PM0_DATA >--------------------*/,{
/*
** Read our host flags to SFBR, so we will be able
** to check against the data direction we expect.
*/
SCR_FROM_REG (HF_REG),
0,
/*
** Check against actual DATA PHASE.
*/
SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
PADDR (pm0_data_out),
/*
** Actual phase is DATA IN.
** Check against expected direction.
*/
SCR_JUMP ^ IFFALSE (MASK (HF_DATA_IN, HF_DATA_IN)),
PADDRH (data_ovrun),
/*
** Keep track we are moving data from the
** PM0 DATA mini-script.
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_IN_PM0),
0,
/*
** Move the data to memory.
*/
SCR_CHMOV_TBL ^ SCR_DATA_IN,
offsetof (struct ccb, phys.pm0.sg),
SCR_JUMP,
PADDR (pm0_data_end),
}/*-------------------------< PM0_DATA_OUT >----------------*/,{
/*
** Actual phase is DATA OUT.
** Check against expected direction.
*/
SCR_JUMP ^ IFTRUE (MASK (HF_DATA_IN, HF_DATA_IN)),
PADDRH (data_ovrun),
/*
** Keep track we are moving data from the
** PM0 DATA mini-script.
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_IN_PM0),
0,
/*
** Move the data from memory.
*/
SCR_CHMOV_TBL ^ SCR_DATA_OUT,
offsetof (struct ccb, phys.pm0.sg),
}/*-------------------------< PM0_DATA_END >----------------*/,{
/*
** Clear the flag that told we were moving
** data from the PM0 DATA mini-script.
*/
SCR_REG_REG (HF_REG, SCR_AND, (~HF_IN_PM0)),
0,
/*
** Return to the previous DATA script which
** is guaranteed by design (if no bug) to be
** the main DATA script for this transfer.
*/
SCR_LOAD_REL (temp, 4),
offsetof (struct ccb, phys.pm0.ret),
SCR_RETURN,
0,
}/*-------------------------< PM1_DATA >--------------------*/,{
/*
** Read our host flags to SFBR, so we will be able
** to check against the data direction we expect.
*/
SCR_FROM_REG (HF_REG),
0,
/*
** Check against actual DATA PHASE.
*/
SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
PADDR (pm1_data_out),
/*
** Actual phase is DATA IN.
** Check against expected direction.
*/
SCR_JUMP ^ IFFALSE (MASK (HF_DATA_IN, HF_DATA_IN)),
PADDRH (data_ovrun),
/*
** Keep track we are moving data from the
** PM1 DATA mini-script.
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_IN_PM1),
0,
/*
** Move the data to memory.
*/
SCR_CHMOV_TBL ^ SCR_DATA_IN,
offsetof (struct ccb, phys.pm1.sg),
SCR_JUMP,
PADDR (pm1_data_end),
}/*-------------------------< PM1_DATA_OUT >----------------*/,{
/*
** Actual phase is DATA OUT.
** Check against expected direction.
*/
SCR_JUMP ^ IFTRUE (MASK (HF_DATA_IN, HF_DATA_IN)),
PADDRH (data_ovrun),
/*
** Keep track we are moving data from the
** PM1 DATA mini-script.
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_IN_PM1),
0,
/*
** Move the data from memory.
*/
SCR_CHMOV_TBL ^ SCR_DATA_OUT,
offsetof (struct ccb, phys.pm1.sg),
}/*-------------------------< PM1_DATA_END >----------------*/,{
/*
** Clear the flag that told we were moving
** data from the PM1 DATA mini-script.
*/
SCR_REG_REG (HF_REG, SCR_AND, (~HF_IN_PM1)),
0,
/*
** Return to the previous DATA script which
** is guaranteed by design (if no bug) to be
** the main DATA script for this transfer.
*/
SCR_LOAD_REL (temp, 4),
offsetof (struct ccb, phys.pm1.ret),
SCR_RETURN,
0,
}/*---------------------------------------------------------*/
};
static struct scripth scripth0 __initdata = {
/*------------------------< START64 >-----------------------*/{
/*
** SCRIPT entry point for the 895A and the 896.
** For now, there is no specific stuff for that
** chip at this point, but this may come.
*/
SCR_JUMP,
PADDR (init),
}/*-------------------------< NO_DATA >-------------------*/,{
SCR_JUMP,
PADDRH (data_ovrun),
}/*-----------------------< SEL_FOR_ABORT >------------------*/,{
/*
** We are jumped here by the C code, if we have
** some target to reset or some disconnected
** job to abort. Since error recovery is a serious
** busyness, we will really reset the SCSI BUS, if
** case of a SCSI interrupt occurring in this path.
*/
/*
** Set initiator mode.
*/
SCR_CLR (SCR_TRG),
0,
/*
** And try to select this target.
*/
SCR_SEL_TBL_ATN ^ offsetof (struct ncb, abrt_sel),
PADDR (reselect),
/*
** Wait for the selection to complete or
** the selection to time out.
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_OUT)),
-8,
/*
** Call the C code.
*/
SCR_INT,
SIR_TARGET_SELECTED,
/*
** The C code should let us continue here.
** Send the 'kiss of death' message.
** We expect an immediate disconnect once
** the target has eaten the message.
*/
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
0,
SCR_MOVE_TBL ^ SCR_MSG_OUT,
offsetof (struct ncb, abrt_tbl),
SCR_CLR (SCR_ACK|SCR_ATN),
0,
SCR_WAIT_DISC,
0,
/*
** Tell the C code that we are done.
*/
SCR_INT,
SIR_ABORT_SENT,
}/*-----------------------< SEL_FOR_ABORT_1 >--------------*/,{
/*
** Jump at scheduler.
*/
SCR_JUMP,
PADDR (start),
}/*------------------------< SELECT_NO_ATN >-----------------*/,{
/*
** Set Initiator mode.
** And try to select this target without ATN.
*/
SCR_CLR (SCR_TRG),
0,
SCR_SEL_TBL ^ offsetof (struct dsb, select),
PADDR (ungetjob),
/*
** load the savep (saved pointer) into
** the actual data pointer.
*/
SCR_LOAD_REL (temp, 4),
offsetof (struct ccb, phys.header.savep),
/*
** Initialize the status registers
*/
SCR_LOAD_REL (scr0, 4),
offsetof (struct ccb, phys.header.status),
}/*------------------------< WF_SEL_DONE_NO_ATN >-----------------*/,{
/*
** Wait immediately for the next phase or
** the selection to complete or time-out.
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_OUT)),
0,
SCR_JUMP,
PADDR (select2),
}/*-------------------------< MSG_IN_ETC >--------------------*/,{
/*
** If it is an EXTENDED (variable size message)
** Handle it.
*/
SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)),
PADDRH (msg_extended),
/*
** Let the C code handle any other
** 1 byte message.
*/
SCR_JUMP ^ IFTRUE (MASK (0x00, 0xf0)),
PADDRH (msg_received),
SCR_JUMP ^ IFTRUE (MASK (0x10, 0xf0)),
PADDRH (msg_received),
/*
** We donnot handle 2 bytes messages from SCRIPTS.
** So, let the C code deal with these ones too.
*/
SCR_JUMP ^ IFFALSE (MASK (0x20, 0xf0)),
PADDRH (msg_weird_seen),
SCR_CLR (SCR_ACK),
0,
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[1]),
SCR_JUMP,
PADDRH (msg_received),
}/*-------------------------< MSG_RECEIVED >--------------------*/,{
SCR_LOAD_REL (scratcha, 4), /* DUMMY READ */
0,
SCR_INT,
SIR_MSG_RECEIVED,
}/*-------------------------< MSG_WEIRD_SEEN >------------------*/,{
SCR_LOAD_REL (scratcha, 4), /* DUMMY READ */
0,
SCR_INT,
SIR_MSG_WEIRD,
}/*-------------------------< MSG_EXTENDED >--------------------*/,{
/*
** Clear ACK and get the next byte
** assumed to be the message length.
*/
SCR_CLR (SCR_ACK),
0,
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[1]),
/*
** Try to catch some unlikely situations as 0 length
** or too large the length.
*/
SCR_JUMP ^ IFTRUE (DATA (0)),
PADDRH (msg_weird_seen),
SCR_TO_REG (scratcha),
0,
SCR_REG_REG (sfbr, SCR_ADD, (256-8)),
0,
SCR_JUMP ^ IFTRUE (CARRYSET),
PADDRH (msg_weird_seen),
/*
** We donnot handle extended messages from SCRIPTS.
** Read the amount of data correponding to the
** message length and call the C code.
*/
SCR_STORE_REL (scratcha, 1),
offsetof (struct dsb, smsg_ext.size),
SCR_CLR (SCR_ACK),
0,
SCR_MOVE_TBL ^ SCR_MSG_IN,
offsetof (struct dsb, smsg_ext),
SCR_JUMP,
PADDRH (msg_received),
}/*-------------------------< MSG_BAD >------------------*/,{
/*
** unimplemented message - reject it.
*/
SCR_INT,
SIR_REJECT_TO_SEND,
SCR_SET (SCR_ATN),
0,
SCR_JUMP,
PADDR (clrack),
}/*-------------------------< MSG_WEIRD >--------------------*/,{
/*
** weird message received
** ignore all MSG IN phases and reject it.
*/
SCR_INT,
SIR_REJECT_TO_SEND,
SCR_SET (SCR_ATN),
0,
}/*-------------------------< MSG_WEIRD1 >--------------------*/,{
SCR_CLR (SCR_ACK),
0,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR (dispatch),
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (scratch),
SCR_JUMP,
PADDRH (msg_weird1),
}/*-------------------------< WDTR_RESP >----------------*/,{
/*
** let the target fetch our answer.
*/
SCR_SET (SCR_ATN),
0,
SCR_CLR (SCR_ACK),
0,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
PADDRH (nego_bad_phase),
}/*-------------------------< SEND_WDTR >----------------*/,{
/*
** Send the M_X_WIDE_REQ
*/
SCR_MOVE_ABS (4) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_JUMP,
PADDRH (msg_out_done),
}/*-------------------------< SDTR_RESP >-------------*/,{
/*
** let the target fetch our answer.
*/
SCR_SET (SCR_ATN),
0,
SCR_CLR (SCR_ACK),
0,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
PADDRH (nego_bad_phase),
}/*-------------------------< SEND_SDTR >-------------*/,{
/*
** Send the M_X_SYNC_REQ
*/
SCR_MOVE_ABS (5) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_JUMP,
PADDRH (msg_out_done),
}/*-------------------------< PPR_RESP >-------------*/,{
/*
** let the target fetch our answer.
*/
SCR_SET (SCR_ATN),
0,
SCR_CLR (SCR_ACK),
0,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
PADDRH (nego_bad_phase),
}/*-------------------------< SEND_PPR >-------------*/,{
/*
** Send the M_X_PPR_REQ
*/
SCR_MOVE_ABS (8) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_JUMP,
PADDRH (msg_out_done),
}/*-------------------------< NEGO_BAD_PHASE >------------*/,{
SCR_INT,
SIR_NEGO_PROTO,
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< MSG_OUT >-------------------*/,{
/*
** The target requests a message.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
NADDR (msgout),
/*
** ... wait for the next phase
** if it's a message out, send it again, ...
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
PADDRH (msg_out),
}/*-------------------------< MSG_OUT_DONE >--------------*/,{
/*
** ... else clear the message ...
*/
SCR_INT,
SIR_MSG_OUT_DONE,
/*
** ... and process the next phase
*/
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< DATA_OVRUN >-----------------------*/,{
/*
* Use scratcha to count the extra bytes.
*/
SCR_LOAD_ABS (scratcha, 4),
PADDRH (zero),
}/*-------------------------< DATA_OVRUN1 >----------------------*/,{
/*
* The target may want to transfer too much data.
*
* If phase is DATA OUT write 1 byte and count it.
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)),
16,
SCR_CHMOV_ABS (1) ^ SCR_DATA_OUT,
NADDR (scratch),
SCR_JUMP,
PADDRH (data_ovrun2),
/*
* If WSR is set, clear this condition, and
* count this byte.
*/
SCR_FROM_REG (scntl2),
0,
SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)),
16,
SCR_REG_REG (scntl2, SCR_OR, WSR),
0,
SCR_JUMP,
PADDRH (data_ovrun2),
/*
* Finally check against DATA IN phase.
* Signal data overrun to the C code
* and jump to dispatcher if not so.
* Read 1 byte otherwise and count it.
*/
SCR_JUMPR ^ IFTRUE (WHEN (SCR_DATA_IN)),
16,
SCR_INT,
SIR_DATA_OVERRUN,
SCR_JUMP,
PADDR (dispatch),
SCR_CHMOV_ABS (1) ^ SCR_DATA_IN,
NADDR (scratch),
}/*-------------------------< DATA_OVRUN2 >----------------------*/,{
/*
* Count this byte.
* This will allow to return a negative
* residual to user.
*/
SCR_REG_REG (scratcha, SCR_ADD, 0x01),
0,
SCR_REG_REG (scratcha1, SCR_ADDC, 0),
0,
SCR_REG_REG (scratcha2, SCR_ADDC, 0),
0,
/*
* .. and repeat as required.
*/
SCR_JUMP,
PADDRH (data_ovrun1),
}/*-------------------------< ABORT_RESEL >----------------*/,{
SCR_SET (SCR_ATN),
0,
SCR_CLR (SCR_ACK),
0,
/*
** send the abort/abortag/reset message
** we expect an immediate disconnect
*/
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
0,
SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_CLR (SCR_ACK|SCR_ATN),
0,
SCR_WAIT_DISC,
0,
SCR_INT,
SIR_RESEL_ABORTED,
SCR_JUMP,
PADDR (start),
}/*-------------------------< RESEND_IDENT >-------------------*/,{
/*
** The target stays in MSG OUT phase after having acked
** Identify [+ Tag [+ Extended message ]]. Targets shall
** behave this way on parity error.
** We must send it again all the messages.
*/
SCR_SET (SCR_ATN), /* Shall be asserted 2 deskew delays before the */
0, /* 1rst ACK = 90 ns. Hope the NCR is'nt too fast */
SCR_JUMP,
PADDR (send_ident),
}/*-------------------------< IDENT_BREAK >-------------------*/,{
SCR_CLR (SCR_ATN),
0,
SCR_JUMP,
PADDR (select2),
}/*-------------------------< IDENT_BREAK_ATN >----------------*/,{
SCR_SET (SCR_ATN),
0,
SCR_JUMP,
PADDR (select2),
}/*-------------------------< SDATA_IN >-------------------*/,{
SCR_CHMOV_TBL ^ SCR_DATA_IN,
offsetof (struct dsb, sense),
SCR_CALL,
PADDR (datai_done),
SCR_JUMP,
PADDRH (data_ovrun),
}/*-------------------------< DATA_IO >--------------------*/,{
/*
** We jump here if the data direction was unknown at the
** time we had to queue the command to the scripts processor.
** Pointers had been set as follow in this situation:
** savep --> DATA_IO
** lastp --> start pointer when DATA_IN
** goalp --> goal pointer when DATA_IN
** wlastp --> start pointer when DATA_OUT
** wgoalp --> goal pointer when DATA_OUT
** This script sets savep/lastp/goalp according to the
** direction chosen by the target.
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_DATA_OUT)),
PADDRH(data_io_out),
}/*-------------------------< DATA_IO_COM >-----------------*/,{
/*
** Direction is DATA IN.
** Warning: we jump here, even when phase is DATA OUT.
*/
SCR_LOAD_REL (scratcha, 4),
offsetof (struct ccb, phys.header.lastp),
SCR_STORE_REL (scratcha, 4),
offsetof (struct ccb, phys.header.savep),
/*
** Jump to the SCRIPTS according to actual direction.
*/
SCR_LOAD_REL (temp, 4),
offsetof (struct ccb, phys.header.savep),
SCR_RETURN,
0,
}/*-------------------------< DATA_IO_OUT >-----------------*/,{
/*
** Direction is DATA OUT.
*/
SCR_REG_REG (HF_REG, SCR_AND, (~HF_DATA_IN)),
0,
SCR_LOAD_REL (scratcha, 4),
offsetof (struct ccb, phys.header.wlastp),
SCR_STORE_REL (scratcha, 4),
offsetof (struct ccb, phys.header.lastp),
SCR_LOAD_REL (scratcha, 4),
offsetof (struct ccb, phys.header.wgoalp),
SCR_STORE_REL (scratcha, 4),
offsetof (struct ccb, phys.header.goalp),
SCR_JUMP,
PADDRH(data_io_com),
}/*-------------------------< RESEL_BAD_LUN >---------------*/,{
/*
** Message is an IDENTIFY, but lun is unknown.
** Signal problem to C code for logging the event.
** Send a M_ABORT to clear all pending tasks.
*/
SCR_INT,
SIR_RESEL_BAD_LUN,
SCR_JUMP,
PADDRH (abort_resel),
}/*-------------------------< BAD_I_T_L >------------------*/,{
/*
** We donnot have a task for that I_T_L.
** Signal problem to C code for logging the event.
** Send a M_ABORT message.
*/
SCR_INT,
SIR_RESEL_BAD_I_T_L,
SCR_JUMP,
PADDRH (abort_resel),
}/*-------------------------< BAD_I_T_L_Q >----------------*/,{
/*
** We donnot have a task that matches the tag.
** Signal problem to C code for logging the event.
** Send a M_ABORTTAG message.
*/
SCR_INT,
SIR_RESEL_BAD_I_T_L_Q,
SCR_JUMP,
PADDRH (abort_resel),
}/*-------------------------< BAD_STATUS >-----------------*/,{
/*
** Anything different from INTERMEDIATE
** CONDITION MET should be a bad SCSI status,
** given that GOOD status has already been tested.
** Call the C code.
*/
SCR_LOAD_ABS (scratcha, 4),
PADDRH (startpos),
SCR_INT ^ IFFALSE (DATA (S_COND_MET)),
SIR_BAD_STATUS,
SCR_RETURN,
0,
}/*-------------------------< TWEAK_PMJ >------------------*/,{
/*
** Disable PM handling from SCRIPTS for the data phase
** and so force PM to be handled from C code if HF_PM_TO_C
** flag is set.
*/
SCR_FROM_REG(HF_REG),
0,
SCR_JUMPR ^ IFTRUE (MASK (HF_PM_TO_C, HF_PM_TO_C)),
16,
SCR_REG_REG (ccntl0, SCR_OR, ENPMJ),
0,
SCR_RETURN,
0,
SCR_REG_REG (ccntl0, SCR_AND, (~ENPMJ)),
0,
SCR_RETURN,
0,
}/*-------------------------< PM_HANDLE >------------------*/,{
/*
** Phase mismatch handling.
**
** Since we have to deal with 2 SCSI data pointers
** (current and saved), we need at least 2 contexts.
** Each context (pm0 and pm1) has a saved area, a
** SAVE mini-script and a DATA phase mini-script.
*/
/*
** Get the PM handling flags.
*/
SCR_FROM_REG (HF_REG),
0,
/*
** If no flags (1rst PM for example), avoid
** all the below heavy flags testing.
** This makes the normal case a bit faster.
*/
SCR_JUMP ^ IFTRUE (MASK (0, (HF_IN_PM0 | HF_IN_PM1 | HF_DP_SAVED))),
PADDRH (pm_handle1),
/*
** If we received a SAVE DP, switch to the
** other PM context since the savep may point
** to the current PM context.
*/
SCR_JUMPR ^ IFFALSE (MASK (HF_DP_SAVED, HF_DP_SAVED)),
8,
SCR_REG_REG (sfbr, SCR_XOR, HF_ACT_PM),
0,
/*
** If we have been interrupt in a PM DATA mini-script,
** we take the return address from the corresponding
** saved area.
** This ensure the return address always points to the
** main DATA script for this transfer.
*/
SCR_JUMP ^ IFTRUE (MASK (0, (HF_IN_PM0 | HF_IN_PM1))),
PADDRH (pm_handle1),
SCR_JUMPR ^ IFFALSE (MASK (HF_IN_PM0, HF_IN_PM0)),
16,
SCR_LOAD_REL (ia, 4),
offsetof(struct ccb, phys.pm0.ret),
SCR_JUMP,
PADDRH (pm_save),
SCR_LOAD_REL (ia, 4),
offsetof(struct ccb, phys.pm1.ret),
SCR_JUMP,
PADDRH (pm_save),
}/*-------------------------< PM_HANDLE1 >-----------------*/,{
/*
** Normal case.
** Update the return address so that it
** will point after the interrupted MOVE.
*/
SCR_REG_REG (ia, SCR_ADD, 8),
0,
SCR_REG_REG (ia1, SCR_ADDC, 0),
0,
}/*-------------------------< PM_SAVE >--------------------*/,{
/*
** Clear all the flags that told us if we were
** interrupted in a PM DATA mini-script and/or
** we received a SAVE DP.
*/
SCR_SFBR_REG (HF_REG, SCR_AND, (~(HF_IN_PM0|HF_IN_PM1|HF_DP_SAVED))),
0,
/*
** Choose the current PM context.
*/
SCR_JUMP ^ IFTRUE (MASK (HF_ACT_PM, HF_ACT_PM)),
PADDRH (pm1_save),
}/*-------------------------< PM0_SAVE >-------------------*/,{
SCR_STORE_REL (ia, 4),
offsetof(struct ccb, phys.pm0.ret),
/*
** If WSR bit is set, either UA and RBC may
** have to be changed whatever the device wants
** to ignore this residue ot not.
*/
SCR_FROM_REG (scntl2),
0,
SCR_CALL ^ IFTRUE (MASK (WSR, WSR)),
PADDRH (pm_wsr_handle),
/*
** Save the remaining byte count, the updated
** address and the return address.
*/
SCR_STORE_REL (rbc, 4),
offsetof(struct ccb, phys.pm0.sg.size),
SCR_STORE_REL (ua, 4),
offsetof(struct ccb, phys.pm0.sg.addr),
/*
** Set the current pointer at the PM0 DATA mini-script.
*/
SCR_LOAD_ABS (temp, 4),
PADDRH (pm0_data_addr),
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< PM1_SAVE >-------------------*/,{
SCR_STORE_REL (ia, 4),
offsetof(struct ccb, phys.pm1.ret),
/*
** If WSR bit is set, either UA and RBC may
** have been changed whatever the device wants
** to ignore this residue or not.
*/
SCR_FROM_REG (scntl2),
0,
SCR_CALL ^ IFTRUE (MASK (WSR, WSR)),
PADDRH (pm_wsr_handle),
/*
** Save the remaining byte count, the updated
** address and the return address.
*/
SCR_STORE_REL (rbc, 4),
offsetof(struct ccb, phys.pm1.sg.size),
SCR_STORE_REL (ua, 4),
offsetof(struct ccb, phys.pm1.sg.addr),
/*
** Set the current pointer at the PM1 DATA mini-script.
*/
SCR_LOAD_ABS (temp, 4),
PADDRH (pm1_data_addr),
SCR_JUMP,
PADDR (dispatch),
}/*--------------------------< PM_WSR_HANDLE >-----------------------*/,{
/*
* Phase mismatch handling from SCRIPT with WSR set.
* Such a condition can occur if the chip wants to
* execute a CHMOV(size > 1) when the WSR bit is
* set and the target changes PHASE.
*/
#ifdef SYM_DEBUG_PM_WITH_WSR
/*
* Some debugging may still be needed.:)
*/
SCR_INT,
SIR_PM_WITH_WSR,
#endif
/*
* We must move the residual byte to memory.
*
* UA contains bit 0..31 of the address to
* move the residual byte.
* Move it to the table indirect.
*/
SCR_STORE_REL (ua, 4),
offsetof (struct ccb, phys.wresid.addr),
/*
* Increment UA (move address to next position).
*/
SCR_REG_REG (ua, SCR_ADD, 1),
0,
SCR_REG_REG (ua1, SCR_ADDC, 0),
0,
SCR_REG_REG (ua2, SCR_ADDC, 0),
0,
SCR_REG_REG (ua3, SCR_ADDC, 0),
0,
/*
* Compute SCRATCHA as:
* - size to transfer = 1 byte.
* - bit 24..31 = high address bit [32...39].
*/
SCR_LOAD_ABS (scratcha, 4),
PADDRH (zero),
SCR_REG_REG (scratcha, SCR_OR, 1),
0,
SCR_FROM_REG (rbc3),
0,
SCR_TO_REG (scratcha3),
0,
/*
* Move this value to the table indirect.
*/
SCR_STORE_REL (scratcha, 4),
offsetof (struct ccb, phys.wresid.size),
/*
* Wait for a valid phase.
* While testing with bogus QUANTUM drives, the C1010
* sometimes raised a spurious phase mismatch with
* WSR and the CHMOV(1) triggered another PM.
* Waiting explicitely for the PHASE seemed to avoid
* the nested phase mismatch. Btw, this didn't happen
* using my IBM drives.
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_IN)),
0,
/*
* Perform the move of the residual byte.
*/
SCR_CHMOV_TBL ^ SCR_DATA_IN,
offsetof (struct ccb, phys.wresid),
/*
* We can now handle the phase mismatch with UA fixed.
* RBC[0..23]=0 is a special case that does not require
* a PM context. The C code also checks against this.
*/
SCR_FROM_REG (rbc),
0,
SCR_RETURN ^ IFFALSE (DATA (0)),
0,
SCR_FROM_REG (rbc1),
0,
SCR_RETURN ^ IFFALSE (DATA (0)),
0,
SCR_FROM_REG (rbc2),
0,
SCR_RETURN ^ IFFALSE (DATA (0)),
0,
/*
* RBC[0..23]=0.
* Not only we donnot need a PM context, but this would
* lead to a bogus CHMOV(0). This condition means that
* the residual was the last byte to move from this CHMOV.
* So, we just have to move the current data script pointer
* (i.e. TEMP) to the SCRIPTS address following the
* interrupted CHMOV and jump to dispatcher.
*/
SCR_STORE_ABS (ia, 4),
PADDRH (scratch),
SCR_LOAD_ABS (temp, 4),
PADDRH (scratch),
SCR_JUMP,
PADDR (dispatch),
}/*--------------------------< WSR_MA_HELPER >-----------------------*/,{
/*
* Helper for the C code when WSR bit is set.
* Perform the move of the residual byte.
*/
SCR_CHMOV_TBL ^ SCR_DATA_IN,
offsetof (struct ccb, phys.wresid),
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< ZERO >------------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< SCRATCH >---------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< SCRATCH1 >--------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< PM0_DATA_ADDR >---------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< PM1_DATA_ADDR >---------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< SAVED_DSA >-------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< SAVED_DRS >-------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< DONE_POS >--------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< STARTPOS >--------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< TARGTBL >---------------------*/,{
SCR_DATA_ZERO,
/*
** We may use MEMORY MOVE instructions to load the on chip-RAM,
** if it happens that mapping PCI memory is not possible.
** But writing the RAM from the CPU is the preferred method,
** since PCI 2.2 seems to disallow PCI self-mastering.
*/
#ifdef SCSI_NCR_PCI_MEM_NOT_SUPPORTED
}/*-------------------------< START_RAM >-------------------*/,{
/*
** Load the script into on-chip RAM,
** and jump to start point.
*/
SCR_COPY (sizeof (struct script)),
}/*-------------------------< SCRIPT0_BA >--------------------*/,{
0,
PADDR (start),
SCR_JUMP,
PADDR (init),
}/*-------------------------< START_RAM64 >--------------------*/,{
/*
** Load the RAM and start for 64 bit PCI (895A,896).
** Both scripts (script and scripth) are loaded into
** the RAM which is 8K (4K for 825A/875/895).
** We also need to load some 32-63 bit segments
** address of the SCRIPTS processor.
** LOAD/STORE ABSOLUTE always refers to on-chip RAM
** in our implementation. The main memory is
** accessed using LOAD/STORE DSA RELATIVE.
*/
SCR_LOAD_REL (mmws, 4),
offsetof (struct ncb, scr_ram_seg),
SCR_COPY (sizeof(struct script)),
}/*-------------------------< SCRIPT0_BA64 >--------------------*/,{
0,
PADDR (start),
SCR_COPY (sizeof(struct scripth)),
}/*-------------------------< SCRIPTH0_BA64 >--------------------*/,{
0,
PADDRH (start64),
SCR_LOAD_REL (mmrs, 4),
offsetof (struct ncb, scr_ram_seg),
SCR_JUMP64,
PADDRH (start64),
}/*-------------------------< RAM_SEG64 >--------------------*/,{
0,
#endif /* SCSI_NCR_PCI_MEM_NOT_SUPPORTED */
}/*-------------------------< SNOOPTEST >-------------------*/,{
/*
** Read the variable.
*/
SCR_LOAD_REL (scratcha, 4),
offsetof(struct ncb, ncr_cache),
SCR_STORE_REL (temp, 4),
offsetof(struct ncb, ncr_cache),
SCR_LOAD_REL (temp, 4),
offsetof(struct ncb, ncr_cache),
}/*-------------------------< SNOOPEND >-------------------*/,{
/*
** And stop.
*/
SCR_INT,
99,
}/*--------------------------------------------------------*/
};
/*==========================================================
**
**
** Fill in #define dependent parts of the script
**
**
**==========================================================
*/
void __init ncr_script_fill (struct script * scr, struct scripth * scrh)
{
int i;
ncrcmd *p;
p = scr->data_in;
for (i=0; i<MAX_SCATTER; i++) {
*p++ =SCR_CHMOV_TBL ^ SCR_DATA_IN;
*p++ =offsetof (struct dsb, data[i]);
};
assert ((u_long)p == (u_long)&scr->data_in + sizeof (scr->data_in));
p = scr->data_out;
for (i=0; i<MAX_SCATTER; i++) {
*p++ =SCR_CHMOV_TBL ^ SCR_DATA_OUT;
*p++ =offsetof (struct dsb, data[i]);
};
assert ((u_long)p == (u_long)&scr->data_out + sizeof (scr->data_out));
}
/*==========================================================
**
**
** Copy and rebind a script.
**
**
**==========================================================
*/
static void __init
ncr_script_copy_and_bind (ncb_p np,ncrcmd *src,ncrcmd *dst,int len)
{
ncrcmd opcode, new, old, tmp1, tmp2;
ncrcmd *start, *end;
int relocs;
int opchanged = 0;
start = src;
end = src + len/4;
while (src < end) {
opcode = *src++;
*dst++ = cpu_to_scr(opcode);
/*
** If we forget to change the length
** in struct script, a field will be
** padded with 0. This is an illegal
** command.
*/
if (opcode == 0) {
printk (KERN_INFO "%s: ERROR0 IN SCRIPT at %d.\n",
ncr_name(np), (int) (src-start-1));
MDELAY (10000);
continue;
};
/*
** We use the bogus value 0xf00ff00f ;-)
** to reserve data area in SCRIPTS.
*/
if (opcode == SCR_DATA_ZERO) {
dst[-1] = 0;
continue;
}
if (DEBUG_FLAGS & DEBUG_SCRIPT)
printk (KERN_INFO "%p: <%x>\n",
(src-1), (unsigned)opcode);
/*
** We don't have to decode ALL commands
*/
switch (opcode >> 28) {
case 0xf:
/*
** LOAD / STORE DSA relative, don't relocate.
*/
relocs = 0;
break;
case 0xe:
/*
** LOAD / STORE absolute.
*/
relocs = 1;
break;
case 0xc:
/*
** COPY has TWO arguments.
*/
relocs = 2;
tmp1 = src[0];
tmp2 = src[1];
#ifdef RELOC_KVAR
if ((tmp1 & RELOC_MASK) == RELOC_KVAR)
tmp1 = 0;
if ((tmp2 & RELOC_MASK) == RELOC_KVAR)
tmp2 = 0;
#endif
if ((tmp1 ^ tmp2) & 3) {
printk (KERN_ERR"%s: ERROR1 IN SCRIPT at %d.\n",
ncr_name(np), (int) (src-start-1));
MDELAY (1000);
}
/*
** If PREFETCH feature not enabled, remove
** the NO FLUSH bit if present.
*/
if ((opcode & SCR_NO_FLUSH) &&
!(np->features & FE_PFEN)) {
dst[-1] = cpu_to_scr(opcode & ~SCR_NO_FLUSH);
++opchanged;
}
break;
case 0x0:
/*
** MOVE/CHMOV (absolute address)
*/
if (!(np->features & FE_WIDE))
dst[-1] = cpu_to_scr(opcode | OPC_MOVE);
relocs = 1;
break;
case 0x1:
/*
** MOVE/CHMOV (table indirect)
*/
if (!(np->features & FE_WIDE))
dst[-1] = cpu_to_scr(opcode | OPC_MOVE);
relocs = 0;
break;
case 0x8:
/*
** JUMP / CALL
** don't relocate if relative :-)
*/
if (opcode & 0x00800000)
relocs = 0;
else if ((opcode & 0xf8400000) == 0x80400000)/*JUMP64*/
relocs = 2;
else
relocs = 1;
break;
case 0x4:
case 0x5:
case 0x6:
case 0x7:
relocs = 1;
break;
default:
relocs = 0;
break;
};
if (!relocs) {
*dst++ = cpu_to_scr(*src++);
continue;
}
while (relocs--) {
old = *src++;
switch (old & RELOC_MASK) {
case RELOC_REGISTER:
new = (old & ~RELOC_MASK) + np->base_ba;
break;
case RELOC_LABEL:
new = (old & ~RELOC_MASK) + np->p_script;
break;
case RELOC_LABELH:
new = (old & ~RELOC_MASK) + np->p_scripth;
break;
case RELOC_SOFTC:
new = (old & ~RELOC_MASK) + np->p_ncb;
break;
#ifdef RELOC_KVAR
case RELOC_KVAR:
new=0;
if (((old & ~RELOC_MASK) < SCRIPT_KVAR_FIRST) ||
((old & ~RELOC_MASK) > SCRIPT_KVAR_LAST))
panic("ncr KVAR out of range");
new = vtobus(script_kvars[old & ~RELOC_MASK]);
#endif
break;
case 0:
/* Don't relocate a 0 address. */
if (old == 0) {
new = old;
break;
}
/* fall through */
default:
new = 0; /* For 'cc' not to complain */
panic("ncr_script_copy_and_bind: "
"weird relocation %x\n", old);
break;
}
*dst++ = cpu_to_scr(new);
}
};
}
/*==========================================================
**
**
** Auto configuration: attach and init a host adapter.
**
**
**==========================================================
*/
/*
** Linux host data structure.
*/
struct host_data {
struct ncb *ncb;
};
/*
** Print something which allows to retrieve the controler type, unit,
** target, lun concerned by a kernel message.
*/
static void PRINT_TARGET(ncb_p np, int target)
{
printk(KERN_INFO "%s-<%d,*>: ", ncr_name(np), target);
}
static void PRINT_LUN(ncb_p np, int target, int lun)
{
printk(KERN_INFO "%s-<%d,%d>: ", ncr_name(np), target, lun);
}
static void PRINT_ADDR(Scsi_Cmnd *cmd)
{
struct host_data *host_data = (struct host_data *) cmd->device->host->hostdata;
PRINT_LUN(host_data->ncb, cmd->device->id, cmd->device->lun);
}
/*==========================================================
**
** NCR chip clock divisor table.
** Divisors are multiplied by 10,000,000 in order to make
** calculations more simple.
**
**==========================================================
*/
#define _5M 5000000
static u_long div_10M[] =
{2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
/*===============================================================
**
** Prepare io register values used by ncr_init() according
** to selected and supported features.
**
** NCR/SYMBIOS chips allow burst lengths of 2, 4, 8, 16, 32, 64,
** 128 transfers. All chips support at least 16 transfers bursts.
** The 825A, 875 and 895 chips support bursts of up to 128
** transfers and the 895A and 896 support bursts of up to 64
** transfers. All other chips support up to 16 transfers bursts.
**
** For PCI 32 bit data transfers each transfer is a DWORD (4 bytes).
** It is a QUADWORD (8 bytes) for PCI 64 bit data transfers.
** Only the 896 is able to perform 64 bit data transfers.
**
** We use log base 2 (burst length) as internal code, with
** value 0 meaning "burst disabled".
**
**===============================================================
*/
/*
* Burst length from burst code.
*/
#define burst_length(bc) (!(bc))? 0 : 1 << (bc)
/*
* Burst code from io register bits.
*/
#define burst_code(dmode, ctest4, ctest5) \
(ctest4) & 0x80? 0 : (((dmode) & 0xc0) >> 6) + ((ctest5) & 0x04) + 1
/*
* Set initial io register bits from burst code.
*/
static inline void ncr_init_burst(ncb_p np, u_char bc)
{
np->rv_ctest4 &= ~0x80;
np->rv_dmode &= ~(0x3 << 6);
np->rv_ctest5 &= ~0x4;
if (!bc) {
np->rv_ctest4 |= 0x80;
}
else {
--bc;
np->rv_dmode |= ((bc & 0x3) << 6);
np->rv_ctest5 |= (bc & 0x4);
}
}
#ifdef SCSI_NCR_NVRAM_SUPPORT
/*
** Get target set-up from Symbios format NVRAM.
*/
static void __init
ncr_Symbios_setup_target(ncb_p np, int target, Symbios_nvram *nvram)
{
tcb_p tp = &np->target[target];
Symbios_target *tn = &nvram->target[target];
tp->usrsync = tn->sync_period ? (tn->sync_period + 3) / 4 : 255;
tp->usrwide = tn->bus_width == 0x10 ? 1 : 0;
tp->usrtags =
(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? MAX_TAGS : 0;
if (!(tn->flags & SYMBIOS_DISCONNECT_ENABLE))
tp->usrflag |= UF_NODISC;
if (!(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME))
tp->usrflag |= UF_NOSCAN;
}
/*
** Get target set-up from Tekram format NVRAM.
*/
static void __init
ncr_Tekram_setup_target(ncb_p np, int target, Tekram_nvram *nvram)
{
tcb_p tp = &np->target[target];
struct Tekram_target *tn = &nvram->target[target];
int i;
if (tn->flags & TEKRAM_SYNC_NEGO) {
i = tn->sync_index & 0xf;
tp->usrsync = Tekram_sync[i];
}
tp->usrwide = (tn->flags & TEKRAM_WIDE_NEGO) ? 1 : 0;
if (tn->flags & TEKRAM_TAGGED_COMMANDS) {
tp->usrtags = 2 << nvram->max_tags_index;
}
if (!(tn->flags & TEKRAM_DISCONNECT_ENABLE))
tp->usrflag = UF_NODISC;
/* If any device does not support parity, we will not use this option */
if (!(tn->flags & TEKRAM_PARITY_CHECK))
np->rv_scntl0 &= ~0x0a; /* SCSI parity checking disabled */
}
#endif /* SCSI_NCR_NVRAM_SUPPORT */
/*
** Save initial settings of some IO registers.
** Assumed to have been set by BIOS.
*/
static void __init ncr_save_initial_setting(ncb_p np)
{
np->sv_scntl0 = INB(nc_scntl0) & 0x0a;
np->sv_dmode = INB(nc_dmode) & 0xce;
np->sv_dcntl = INB(nc_dcntl) & 0xa8;
np->sv_ctest3 = INB(nc_ctest3) & 0x01;
np->sv_ctest4 = INB(nc_ctest4) & 0x80;
np->sv_gpcntl = INB(nc_gpcntl);
np->sv_stest2 = INB(nc_stest2) & 0x20;
np->sv_stest4 = INB(nc_stest4);
np->sv_stest1 = INB(nc_stest1);
np->sv_scntl3 = INB(nc_scntl3) & 0x07;
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66) ){
/*
** C1010 always uses large fifo, bit 5 rsvd
** scntl4 used ONLY with C1010
*/
np->sv_ctest5 = INB(nc_ctest5) & 0x04 ;
np->sv_scntl4 = INB(nc_scntl4);
}
else {
np->sv_ctest5 = INB(nc_ctest5) & 0x24 ;
np->sv_scntl4 = 0;
}
}
/*
** Prepare io register values used by ncr_init()
** according to selected and supported features.
*/
static int __init ncr_prepare_setting(ncb_p np, ncr_nvram *nvram)
{
u_char burst_max;
u_long period;
int i;
#ifdef CONFIG_PARISC
char scsi_mode = -1;
struct hardware_path hwpath;
#endif
/*
** Wide ?
*/
np->maxwide = (np->features & FE_WIDE)? 1 : 0;
/*
* Guess the frequency of the chip's clock.
*/
if (np->features & (FE_ULTRA3 | FE_ULTRA2))
np->clock_khz = 160000;
else if (np->features & FE_ULTRA)
np->clock_khz = 80000;
else
np->clock_khz = 40000;
/*
* Get the clock multiplier factor.
*/
if (np->features & FE_QUAD)
np->multiplier = 4;
else if (np->features & FE_DBLR)
np->multiplier = 2;
else
np->multiplier = 1;
/*
* Measure SCSI clock frequency for chips
* it may vary from assumed one.
*/
if (np->features & FE_VARCLK)
ncr_getclock(np, np->multiplier);
/*
* Divisor to be used for async (timer pre-scaler).
*
* Note: For C1010 the async divisor is 2(8) if he
* quadrupler is disabled (enabled).
*/
if ( (np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)) {
np->rv_scntl3 = 0;
}
else
{
i = np->clock_divn - 1;
while (--i >= 0) {
if (10ul * SCSI_NCR_MIN_ASYNC * np->clock_khz
> div_10M[i]) {
++i;
break;
}
}
np->rv_scntl3 = i+1;
}
/*
* Save the ultra3 register for the C1010/C1010_66
*/
np->rv_scntl4 = np->sv_scntl4;
/*
* Minimum synchronous period factor supported by the chip.
* Btw, 'period' is in tenths of nanoseconds.
*/
period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz;
#ifdef CONFIG_PARISC
/* Host firmware (PDC) keeps a table for crippling SCSI capabilities.
* Many newer machines export one channel of 53c896 chip
* as SE, 50-pin HD. Also used for Multi-initiator SCSI clusters
* to set the SCSI Initiator ID.
*/
get_pci_node_path(np->pdev, &hwpath);
if (pdc_get_initiator(&hwpath, &np->myaddr, &period, &np->maxwide, &scsi_mode))
{
if (np->maxwide)
np->features |= FE_WIDE;
if (scsi_mode >= 0) {
/* C3000 PDC reports period/mode */
driver_setup.diff_support = 0;
switch(scsi_mode) {
case 0: np->scsi_mode = SMODE_SE; break;
case 1: np->scsi_mode = SMODE_HVD; break;
case 2: np->scsi_mode = SMODE_LVD; break;
default: break;
}
}
}
#endif
if (period <= 250) np->minsync = 10;
else if (period <= 303) np->minsync = 11;
else if (period <= 500) np->minsync = 12;
else np->minsync = (period + 40 - 1) / 40;
/*
* Fix up. If sync. factor is 10 (160000Khz clock) and chip
* supports ultra3, then min. sync. period 12.5ns and the factor is 9
* Also keep track of the maximum offset in ST mode which may differ
* from the maximum offset in DT mode. For now hardcoded to 31.
*/
if (np->features & FE_ULTRA3) {
if (np->minsync == 10)
np->minsync = 9;
np->maxoffs_st = 31;
}
else
np->maxoffs_st = np->maxoffs;
/*
* Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
*
* Transfer period minimums: SCSI-1 200 (50); Fast 100 (25)
* Ultra 50 (12); Ultra2 (6); Ultra3 (3)
*/
if (np->minsync < 25 && !(np->features & (FE_ULTRA|FE_ULTRA2|FE_ULTRA3)))
np->minsync = 25;
else if (np->minsync < 12 && (np->features & FE_ULTRA))
np->minsync = 12;
else if (np->minsync < 10 && (np->features & FE_ULTRA2))
np->minsync = 10;
else if (np->minsync < 9 && (np->features & FE_ULTRA3))
np->minsync = 9;
/*
* Maximum synchronous period factor supported by the chip.
*/
period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
np->maxsync = period > 2540 ? 254 : period / 10;
/*
** 64 bit (53C895A or 53C896) ?
*/
if (np->features & FE_DAC) {
if (np->features & FE_DAC_IN_USE)
np->rv_ccntl1 |= (XTIMOD | EXTIBMV);
else
np->rv_ccntl1 |= (DDAC);
}
/*
** Phase mismatch handled by SCRIPTS (53C895A, 53C896 or C1010) ?
*/
if (np->features & FE_NOPM)
np->rv_ccntl0 |= (ENPMJ);
/*
** Prepare initial value of other IO registers
*/
#if defined SCSI_NCR_TRUST_BIOS_SETTING
np->rv_scntl0 = np->sv_scntl0;
np->rv_dmode = np->sv_dmode;
np->rv_dcntl = np->sv_dcntl;
np->rv_ctest3 = np->sv_ctest3;
np->rv_ctest4 = np->sv_ctest4;
np->rv_ctest5 = np->sv_ctest5;
burst_max = burst_code(np->sv_dmode, np->sv_ctest4, np->sv_ctest5);
#else
/*
** Select burst length (dwords)
*/
burst_max = driver_setup.burst_max;
if (burst_max == 255)
burst_max = burst_code(np->sv_dmode, np->sv_ctest4, np->sv_ctest5);
if (burst_max > 7)
burst_max = 7;
if (burst_max > np->maxburst)
burst_max = np->maxburst;
/*
** DEL 352 - 53C810 Rev x11 - Part Number 609-0392140 - ITEM 2.
** This chip and the 860 Rev 1 may wrongly use PCI cache line
** based transactions on LOAD/STORE instructions. So we have
** to prevent these chips from using such PCI transactions in
** this driver. The generic sym53c8xx driver that does not use
** LOAD/STORE instructions does not need this work-around.
*/
if ((np->device_id == PCI_DEVICE_ID_NCR_53C810 &&
np->revision_id >= 0x10 && np->revision_id <= 0x11) ||
(np->device_id == PCI_DEVICE_ID_NCR_53C860 &&
np->revision_id <= 0x1))
np->features &= ~(FE_WRIE|FE_ERL|FE_ERMP);
/*
** DEL ? - 53C1010 Rev 1 - Part Number 609-0393638
** 64-bit Slave Cycles must be disabled.
*/
if ( ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) && (np->revision_id < 0x02) )
|| (np->device_id == PCI_DEVICE_ID_LSI_53C1010_66 ) )
np->rv_ccntl1 |= 0x10;
/*
** Select all supported special features.
** If we are using on-board RAM for scripts, prefetch (PFEN)
** does not help, but burst op fetch (BOF) does.
** Disabling PFEN makes sure BOF will be used.
*/
if (np->features & FE_ERL)
np->rv_dmode |= ERL; /* Enable Read Line */
if (np->features & FE_BOF)
np->rv_dmode |= BOF; /* Burst Opcode Fetch */
if (np->features & FE_ERMP)
np->rv_dmode |= ERMP; /* Enable Read Multiple */
#if 1
if ((np->features & FE_PFEN) && !np->base2_ba)
#else
if (np->features & FE_PFEN)
#endif
np->rv_dcntl |= PFEN; /* Prefetch Enable */
if (np->features & FE_CLSE)
np->rv_dcntl |= CLSE; /* Cache Line Size Enable */
if (np->features & FE_WRIE)
np->rv_ctest3 |= WRIE; /* Write and Invalidate */
if ( (np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66) &&
(np->features & FE_DFS))
np->rv_ctest5 |= DFS; /* Dma Fifo Size */
/* C1010/C1010_66 always large fifo */
/*
** Select some other
*/
if (driver_setup.master_parity)
np->rv_ctest4 |= MPEE; /* Master parity checking */
if (driver_setup.scsi_parity)
np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */
#ifdef SCSI_NCR_NVRAM_SUPPORT
/*
** Get parity checking, host ID and verbose mode from NVRAM
**/
if (nvram) {
switch(nvram->type) {
case SCSI_NCR_TEKRAM_NVRAM:
np->myaddr = nvram->data.Tekram.host_id & 0x0f;
break;
case SCSI_NCR_SYMBIOS_NVRAM:
if (!(nvram->data.Symbios.flags & SYMBIOS_PARITY_ENABLE))
np->rv_scntl0 &= ~0x0a;
np->myaddr = nvram->data.Symbios.host_id & 0x0f;
if (nvram->data.Symbios.flags & SYMBIOS_VERBOSE_MSGS)
np->verbose += 1;
break;
}
}
#endif
/*
** Get SCSI addr of host adapter (set by bios?).
*/
if (np->myaddr == 255) {
np->myaddr = INB(nc_scid) & 0x07;
if (!np->myaddr)
np->myaddr = SCSI_NCR_MYADDR;
}
#endif /* SCSI_NCR_TRUST_BIOS_SETTING */
/*
* Prepare initial io register bits for burst length
*/
ncr_init_burst(np, burst_max);
/*
** Set SCSI BUS mode.
**
** - ULTRA2 chips (895/895A/896)
** and ULTRA 3 chips (1010) report the current
** BUS mode through the STEST4 IO register.
** - For previous generation chips (825/825A/875),
** user has to tell us how to check against HVD,
** since a 100% safe algorithm is not possible.
*/
np->scsi_mode = SMODE_SE;
if (np->features & (FE_ULTRA2 | FE_ULTRA3))
np->scsi_mode = (np->sv_stest4 & SMODE);
else if (np->features & FE_DIFF) {
switch(driver_setup.diff_support) {
case 4: /* Trust previous settings if present, then GPIO3 */
if (np->sv_scntl3) {
if (np->sv_stest2 & 0x20)
np->scsi_mode = SMODE_HVD;
break;
}
case 3: /* SYMBIOS controllers report HVD through GPIO3 */
if (nvram && nvram->type != SCSI_NCR_SYMBIOS_NVRAM)
break;
if (INB(nc_gpreg) & 0x08)
break;
case 2: /* Set HVD unconditionally */
np->scsi_mode = SMODE_HVD;
case 1: /* Trust previous settings for HVD */
if (np->sv_stest2 & 0x20)
np->scsi_mode = SMODE_HVD;
break;
default:/* Don't care about HVD */
break;
}
}
if (np->scsi_mode == SMODE_HVD)
np->rv_stest2 |= 0x20;
/*
** Set LED support from SCRIPTS.
** Ignore this feature for boards known to use a
** specific GPIO wiring and for the 895A or 896
** that drive the LED directly.
** Also probe initial setting of GPIO0 as output.
*/
if ((driver_setup.led_pin ||
(nvram && nvram->type == SCSI_NCR_SYMBIOS_NVRAM)) &&
!(np->features & FE_LEDC) && !(np->sv_gpcntl & 0x01))
np->features |= FE_LED0;
/*
** Set irq mode.
*/
switch(driver_setup.irqm & 3) {
case 2:
np->rv_dcntl |= IRQM;
break;
case 1:
np->rv_dcntl |= (np->sv_dcntl & IRQM);
break;
default:
break;
}
/*
** Configure targets according to driver setup.
** If NVRAM present get targets setup from NVRAM.
** Allow to override sync, wide and NOSCAN from
** boot command line.
*/
for (i = 0 ; i < MAX_TARGET ; i++) {
tcb_p tp = &np->target[i];
tp->usrsync = 255;
#ifdef SCSI_NCR_NVRAM_SUPPORT
if (nvram) {
switch(nvram->type) {
case SCSI_NCR_TEKRAM_NVRAM:
ncr_Tekram_setup_target(np, i, &nvram->data.Tekram);
break;
case SCSI_NCR_SYMBIOS_NVRAM:
ncr_Symbios_setup_target(np, i, &nvram->data.Symbios);
break;
}
if (driver_setup.use_nvram & 0x2)
tp->usrsync = driver_setup.default_sync;
if (driver_setup.use_nvram & 0x4)
tp->usrwide = driver_setup.max_wide;
if (driver_setup.use_nvram & 0x8)
tp->usrflag &= ~UF_NOSCAN;
}
else {
#else
if (1) {
#endif
tp->usrsync = driver_setup.default_sync;
tp->usrwide = driver_setup.max_wide;
tp->usrtags = MAX_TAGS;
if (!driver_setup.disconnection)
np->target[i].usrflag = UF_NODISC;
}
}
/*
** Announce all that stuff to user.
*/
i = nvram ? nvram->type : 0;
printk(KERN_INFO "%s: %sID %d, Fast-%d%s%s\n", ncr_name(np),
i == SCSI_NCR_SYMBIOS_NVRAM ? "Symbios format NVRAM, " :
(i == SCSI_NCR_TEKRAM_NVRAM ? "Tekram format NVRAM, " : ""),
np->myaddr,
np->minsync < 10 ? 80 :
(np->minsync < 12 ? 40 : (np->minsync < 25 ? 20 : 10) ),
(np->rv_scntl0 & 0xa) ? ", Parity Checking" : ", NO Parity",
(np->rv_stest2 & 0x20) ? ", Differential" : "");
if (bootverbose > 1) {
printk (KERN_INFO "%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
"(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
ncr_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl,
np->sv_ctest3, np->sv_ctest4, np->sv_ctest5);
printk (KERN_INFO "%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
"(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
ncr_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl,
np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
}
if (bootverbose && np->base2_ba)
printk (KERN_INFO "%s: on-chip RAM at 0x%lx\n",
ncr_name(np), np->base2_ba);
return 0;
}
#ifdef SCSI_NCR_DEBUG_NVRAM
void __init ncr_display_Symbios_nvram(ncb_p np, Symbios_nvram *nvram)
{
int i;
/* display Symbios nvram host data */
printk(KERN_DEBUG "%s: HOST ID=%d%s%s%s%s%s\n",
ncr_name(np), nvram->host_id & 0x0f,
(nvram->flags & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"",
(nvram->flags & SYMBIOS_PARITY_ENABLE) ? " PARITY" :"",
(nvram->flags & SYMBIOS_VERBOSE_MSGS) ? " VERBOSE" :"",
(nvram->flags & SYMBIOS_CHS_MAPPING) ? " CHS_ALT" :"",
(nvram->flags1 & SYMBIOS_SCAN_HI_LO) ? " HI_LO" :"");
/* display Symbios nvram drive data */
for (i = 0 ; i < 15 ; i++) {
struct Symbios_target *tn = &nvram->target[i];
printk(KERN_DEBUG "%s-%d:%s%s%s%s WIDTH=%d SYNC=%d TMO=%d\n",
ncr_name(np), i,
(tn->flags & SYMBIOS_DISCONNECT_ENABLE) ? " DISC" : "",
(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME) ? " SCAN_BOOT" : "",
(tn->flags & SYMBIOS_SCAN_LUNS) ? " SCAN_LUNS" : "",
(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? " TCQ" : "",
tn->bus_width,
tn->sync_period / 4,
tn->timeout);
}
}
static u_char Tekram_boot_delay[7] __initdata = {3, 5, 10, 20, 30, 60, 120};
void __init ncr_display_Tekram_nvram(ncb_p np, Tekram_nvram *nvram)
{
int i, tags, boot_delay;
char *rem;
/* display Tekram nvram host data */
tags = 2 << nvram->max_tags_index;
boot_delay = 0;
if (nvram->boot_delay_index < 6)
boot_delay = Tekram_boot_delay[nvram->boot_delay_index];
switch((nvram->flags & TEKRAM_REMOVABLE_FLAGS) >> 6) {
default:
case 0: rem = ""; break;
case 1: rem = " REMOVABLE=boot device"; break;
case 2: rem = " REMOVABLE=all"; break;
}
printk(KERN_DEBUG
"%s: HOST ID=%d%s%s%s%s%s%s%s%s%s BOOT DELAY=%d tags=%d\n",
ncr_name(np), nvram->host_id & 0x0f,
(nvram->flags1 & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"",
(nvram->flags & TEKRAM_MORE_THAN_2_DRIVES) ? " >2DRIVES" :"",
(nvram->flags & TEKRAM_DRIVES_SUP_1GB) ? " >1GB" :"",
(nvram->flags & TEKRAM_RESET_ON_POWER_ON) ? " RESET" :"",
(nvram->flags & TEKRAM_ACTIVE_NEGATION) ? " ACT_NEG" :"",
(nvram->flags & TEKRAM_IMMEDIATE_SEEK) ? " IMM_SEEK" :"",
(nvram->flags & TEKRAM_SCAN_LUNS) ? " SCAN_LUNS" :"",
(nvram->flags1 & TEKRAM_F2_F6_ENABLED) ? " F2_F6" :"",
rem, boot_delay, tags);
/* display Tekram nvram drive data */
for (i = 0; i <= 15; i++) {
int sync, j;
struct Tekram_target *tn = &nvram->target[i];
j = tn->sync_index & 0xf;
sync = Tekram_sync[j];
printk(KERN_DEBUG "%s-%d:%s%s%s%s%s%s PERIOD=%d\n",
ncr_name(np), i,
(tn->flags & TEKRAM_PARITY_CHECK) ? " PARITY" : "",
(tn->flags & TEKRAM_SYNC_NEGO) ? " SYNC" : "",
(tn->flags & TEKRAM_DISCONNECT_ENABLE) ? " DISC" : "",
(tn->flags & TEKRAM_START_CMD) ? " START" : "",
(tn->flags & TEKRAM_TAGGED_COMMANDS) ? " TCQ" : "",
(tn->flags & TEKRAM_WIDE_NEGO) ? " WIDE" : "",
sync);
}
}
#endif /* SCSI_NCR_DEBUG_NVRAM */
/*
** Host attach and initialisations.
**
** Allocate host data and ncb structure.
** Request IO region and remap MMIO region.
** Do chip initialization.
** If all is OK, install interrupt handling and
** start the timer daemon.
*/
static int __init
ncr_attach (Scsi_Host_Template *tpnt, int unit, ncr_device *device)
{
struct host_data *host_data;
ncb_p np = 0;
struct Scsi_Host *instance = 0;
u_long flags = 0;
ncr_nvram *nvram = device->nvram;
int i;
printk(KERN_INFO NAME53C "%s-%d: rev 0x%x on pci bus %d device %d function %d "
#ifdef __sparc__
"irq %s\n",
#else
"irq %d\n",
#endif
device->chip.name, unit, device->chip.revision_id,
device->slot.bus, (device->slot.device_fn & 0xf8) >> 3,
device->slot.device_fn & 7,
#ifdef __sparc__
__irq_itoa(device->slot.irq));
#else
device->slot.irq);
#endif
/*
** Allocate host_data structure
*/
if (!(instance = scsi_register(tpnt, sizeof(*host_data))))
goto attach_error;
host_data = (struct host_data *) instance->hostdata;
/*
** Allocate the host control block.
*/
np = __m_calloc_dma(device->pdev, sizeof(struct ncb), "NCB");
if (!np)
goto attach_error;
NCR_INIT_LOCK_NCB(np);
np->pdev = device->pdev;
np->p_ncb = vtobus(np);
host_data->ncb = np;
/*
** Store input informations in the host data structure.
*/
strncpy(np->chip_name, device->chip.name, sizeof(np->chip_name) - 1);
np->unit = unit;
np->verbose = driver_setup.verbose;
sprintf(np->inst_name, NAME53C "%s-%d", np->chip_name, np->unit);
np->device_id = device->chip.device_id;
np->revision_id = device->chip.revision_id;
np->bus = device->slot.bus;
np->device_fn = device->slot.device_fn;
np->features = device->chip.features;
np->clock_divn = device->chip.nr_divisor;
np->maxoffs = device->chip.offset_max;
np->maxburst = device->chip.burst_max;
np->myaddr = device->host_id;
/*
** Allocate the start queue.
*/
np->squeue = (ncrcmd *)
m_calloc_dma(sizeof(ncrcmd)*(MAX_START*2), "SQUEUE");
if (!np->squeue)
goto attach_error;
np->p_squeue = vtobus(np->squeue);
/*
** Allocate the done queue.
*/
np->dqueue = (ncrcmd *)
m_calloc_dma(sizeof(ncrcmd)*(MAX_START*2), "DQUEUE");
if (!np->dqueue)
goto attach_error;
/*
** Allocate the target bus address array.
*/
np->targtbl = (u_int32 *) m_calloc_dma(256, "TARGTBL");
if (!np->targtbl)
goto attach_error;
/*
** Allocate SCRIPTS areas
*/
np->script0 = (struct script *)
m_calloc_dma(sizeof(struct script), "SCRIPT");
if (!np->script0)
goto attach_error;
np->scripth0 = (struct scripth *)
m_calloc_dma(sizeof(struct scripth), "SCRIPTH");
if (!np->scripth0)
goto attach_error;
/*
** Initialyze the CCB free queue and,
** allocate some CCB. We need at least ONE.
*/
xpt_que_init(&np->free_ccbq);
xpt_que_init(&np->b0_ccbq);
if (!ncr_alloc_ccb(np))
goto attach_error;
/*
** Initialize timer structure
**
*/
init_timer(&np->timer);
np->timer.data = (unsigned long) np;
np->timer.function = sym53c8xx_timeout;
/*
** Try to map the controller chip to
** virtual and physical memory.
*/
np->base_ba = device->slot.base;
np->base_ws = (np->features & FE_IO256)? 256 : 128;
np->base2_ba = (np->features & FE_RAM)? device->slot.base_2 : 0;
#ifndef SCSI_NCR_IOMAPPED
np->base_va = remap_pci_mem(device->slot.base_c, np->base_ws);
if (!np->base_va) {
printk(KERN_ERR "%s: can't map PCI MMIO region\n",ncr_name(np));
goto attach_error;
}
else if (bootverbose > 1)
printk(KERN_INFO "%s: using memory mapped IO\n", ncr_name(np));
/*
** Make the controller's registers available.
** Now the INB INW INL OUTB OUTW OUTL macros
** can be used safely.
*/
np->reg = (struct ncr_reg *) np->base_va;
#endif /* !defined SCSI_NCR_IOMAPPED */
/*
** If on-chip RAM is used, make sure SCRIPTS isn't too large.
*/
if (np->base2_ba && sizeof(struct script) > 4096) {
printk(KERN_ERR "%s: script too large.\n", ncr_name(np));
goto attach_error;
}
/*
** Try to map the controller chip into iospace.
*/
if (device->slot.io_port) {
request_region(device->slot.io_port, np->base_ws, NAME53C8XX);
np->base_io = device->slot.io_port;
}
#ifdef SCSI_NCR_NVRAM_SUPPORT
if (nvram) {
switch(nvram->type) {
case SCSI_NCR_SYMBIOS_NVRAM:
#ifdef SCSI_NCR_DEBUG_NVRAM
ncr_display_Symbios_nvram(np, &nvram->data.Symbios);
#endif
break;
case SCSI_NCR_TEKRAM_NVRAM:
#ifdef SCSI_NCR_DEBUG_NVRAM
ncr_display_Tekram_nvram(np, &nvram->data.Tekram);
#endif
break;
default:
nvram = 0;
#ifdef SCSI_NCR_DEBUG_NVRAM
printk(KERN_DEBUG "%s: NVRAM: None or invalid data.\n", ncr_name(np));
#endif
}
}
#endif
/*
** Save setting of some IO registers, so we will
** be able to probe specific implementations.
*/
ncr_save_initial_setting (np);
/*
** Reset the chip now, since it has been reported
** that SCSI clock calibration may not work properly
** if the chip is currently active.
*/
ncr_chip_reset (np);
/*
** Do chip dependent initialization.
*/
(void) ncr_prepare_setting(np, nvram);
/*
** Check the PCI clock frequency if needed.
**
** Must be done after ncr_prepare_setting since it destroys
** STEST1 that is used to probe for the clock multiplier.
**
** The range is currently [22688 - 45375 Khz], given
** the values used by ncr_getclock().
** This calibration of the frequecy measurement
** algorithm against the PCI clock frequency is only
** performed if the driver has had to measure the SCSI
** clock due to other heuristics not having been enough
** to deduce the SCSI clock frequency.
**
** When the chip has been initialized correctly by the
** SCSI BIOS, the driver deduces the presence of the
** clock multiplier and the value of the SCSI clock from
** initial values of IO registers, and therefore no
** clock measurement is performed.
** Normally the driver should never have to measure any
** clock, unless the controller may use a 80 MHz clock
** or has a clock multiplier and any of the following
** condition is met:
**
** - No SCSI BIOS is present.
** - SCSI BIOS did'nt enable the multiplier for some reason.
** - User has disabled the controller from the SCSI BIOS.
** - User booted the O/S from another O/S that did'nt enable
** the multiplier for some reason.
**
** As a result, the driver may only have to measure some
** frequency in very unusual situations.
**
** For this reality test against the PCI clock to really
** protect against flaws in the udelay() calibration or
** driver problem that affect the clock measurement
** algorithm, the actual PCI clock frequency must be 33 MHz.
*/
i = np->pciclock_max ? ncr_getpciclock(np) : 0;
if (i && (i < np->pciclock_min || i > np->pciclock_max)) {
printk(KERN_ERR "%s: PCI clock (%u KHz) is out of range "
"[%u KHz - %u KHz].\n",
ncr_name(np), i, np->pciclock_min, np->pciclock_max);
goto attach_error;
}
/*
** Patch script to physical addresses
*/
ncr_script_fill (&script0, &scripth0);
np->p_script = vtobus(np->script0);
np->p_scripth = vtobus(np->scripth0);
np->p_scripth0 = np->p_scripth;
if (np->base2_ba) {
np->p_script = np->base2_ba;
if (np->features & FE_RAM8K) {
np->base2_ws = 8192;
np->p_scripth = np->p_script + 4096;
#if BITS_PER_LONG > 32
np->scr_ram_seg = cpu_to_scr(np->base2_ba >> 32);
#endif
}
else
np->base2_ws = 4096;
#ifndef SCSI_NCR_PCI_MEM_NOT_SUPPORTED
np->base2_va =
remap_pci_mem(device->slot.base_2_c, np->base2_ws);
if (!np->base2_va) {
printk(KERN_ERR "%s: can't map PCI MEMORY region\n",
ncr_name(np));
goto attach_error;
}
#endif
}
ncr_script_copy_and_bind (np, (ncrcmd *) &script0, (ncrcmd *) np->script0, sizeof(struct script));
ncr_script_copy_and_bind (np, (ncrcmd *) &scripth0, (ncrcmd *) np->scripth0, sizeof(struct scripth));
/*
** Patch some variables in SCRIPTS
*/
np->scripth0->pm0_data_addr[0] =
cpu_to_scr(NCB_SCRIPT_PHYS(np, pm0_data));
np->scripth0->pm1_data_addr[0] =
cpu_to_scr(NCB_SCRIPT_PHYS(np, pm1_data));
/*
** Patch if not Ultra 3 - Do not write to scntl4
*/
if (np->features & FE_ULTRA3) {
np->script0->resel_scntl4[0] = cpu_to_scr(SCR_LOAD_REL (scntl4, 1));
np->script0->resel_scntl4[1] = cpu_to_scr(offsetof(struct tcb, uval));
}
#ifdef SCSI_NCR_PCI_MEM_NOT_SUPPORTED
np->scripth0->script0_ba[0] = cpu_to_scr(vtobus(np->script0));
np->scripth0->script0_ba64[0] = cpu_to_scr(vtobus(np->script0));
np->scripth0->scripth0_ba64[0] = cpu_to_scr(vtobus(np->scripth0));
np->scripth0->ram_seg64[0] = np->scr_ram_seg;
#endif
/*
** Prepare the idle and invalid task actions.
*/
np->idletask.start = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
np->idletask.restart = cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_i_t_l));
np->p_idletask = NCB_PHYS(np, idletask);
np->notask.start = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
np->notask.restart = cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_i_t_l));
np->p_notask = NCB_PHYS(np, notask);
np->bad_i_t_l.start = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
np->bad_i_t_l.restart = cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_i_t_l));
np->p_bad_i_t_l = NCB_PHYS(np, bad_i_t_l);
np->bad_i_t_l_q.start = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
np->bad_i_t_l_q.restart = cpu_to_scr(NCB_SCRIPTH_PHYS (np,bad_i_t_l_q));
np->p_bad_i_t_l_q = NCB_PHYS(np, bad_i_t_l_q);
/*
** Allocate and prepare the bad lun table.
*/
np->badluntbl = m_calloc_dma(256, "BADLUNTBL");
if (!np->badluntbl)
goto attach_error;
assert (offsetof(struct lcb, resel_task) == 0);
np->resel_badlun = cpu_to_scr(NCB_SCRIPTH_PHYS(np, resel_bad_lun));
for (i = 0 ; i < 64 ; i++)
np->badluntbl[i] = cpu_to_scr(NCB_PHYS(np, resel_badlun));
/*
** Prepare the target bus address array.
*/
np->scripth0->targtbl[0] = cpu_to_scr(vtobus(np->targtbl));
for (i = 0 ; i < MAX_TARGET ; i++) {
np->targtbl[i] = cpu_to_scr(NCB_PHYS(np, target[i]));
np->target[i].b_luntbl = cpu_to_scr(vtobus(np->badluntbl));
np->target[i].b_lun0 = cpu_to_scr(NCB_PHYS(np, resel_badlun));
}
/*
** Patch the script for LED support.
*/
if (np->features & FE_LED0) {
np->script0->idle[0] =
cpu_to_scr(SCR_REG_REG(gpreg, SCR_OR, 0x01));
np->script0->reselected[0] =
cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
np->script0->start[0] =
cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
}
/*
** Patch the script to provide an extra clock cycle on
** data out phase - 53C1010_66MHz part only.
** (Fixed in rev. 1 of the chip)
*/
if (np->device_id == PCI_DEVICE_ID_LSI_53C1010_66 &&
np->revision_id < 1){
np->script0->datao_phase[0] =
cpu_to_scr(SCR_REG_REG(scntl4, SCR_OR, 0x0c));
}
#ifdef SCSI_NCR_IARB_SUPPORT
/*
** If user does not want to use IMMEDIATE ARBITRATION
** when we are reselected while attempting to arbitrate,
** patch the SCRIPTS accordingly with a SCRIPT NO_OP.
*/
if (!(driver_setup.iarb & 1))
np->script0->ungetjob[0] = cpu_to_scr(SCR_NO_OP);
/*
** If user wants IARB to be set when we win arbitration
** and have other jobs, compute the max number of consecutive
** settings of IARB hint before we leave devices a chance to
** arbitrate for reselection.
*/
np->iarb_max = (driver_setup.iarb >> 4);
#endif
/*
** DEL 472 - 53C896 Rev 1 - Part Number 609-0393055 - ITEM 5.
*/
if (np->device_id == PCI_DEVICE_ID_NCR_53C896 &&
np->revision_id <= 0x1 && (np->features & FE_NOPM)) {
np->scatter = ncr_scatter_896R1;
np->script0->datai_phase[0] = cpu_to_scr(SCR_JUMP);
np->script0->datai_phase[1] =
cpu_to_scr(NCB_SCRIPTH_PHYS (np, tweak_pmj));
np->script0->datao_phase[0] = cpu_to_scr(SCR_JUMP);
np->script0->datao_phase[1] =
cpu_to_scr(NCB_SCRIPTH_PHYS (np, tweak_pmj));
}
else
#ifdef DEBUG_896R1
np->scatter = ncr_scatter_896R1;
#else
np->scatter = ncr_scatter;
#endif
/*
** Reset chip.
** We should use ncr_soft_reset(), but we donnot want to do
** so, since we may not be safe if ABRT interrupt occurs due
** to the BIOS or previous O/S having enable this interrupt.
**
** For C1010 need to set ABRT bit prior to SRST if SCRIPTs
** are running. Not true in this case.
*/
ncr_chip_reset(np);
/*
** Now check the cache handling of the pci chipset.
*/
if (ncr_snooptest (np)) {
printk (KERN_ERR "CACHE INCORRECTLY CONFIGURED.\n");
goto attach_error;
};
/*
** Install the interrupt handler.
** If we synchonize the C code with SCRIPTS on interrupt,
** we donnot want to share the INTR line at all.
*/
if (request_irq(device->slot.irq, sym53c8xx_intr,
#ifdef SCSI_NCR_PCIQ_SYNC_ON_INTR
((driver_setup.irqm & 0x20) ? 0 : SA_INTERRUPT),
#else
((driver_setup.irqm & 0x10) ? 0 : SA_SHIRQ) |
#if LINUX_VERSION_CODE < LinuxVersionCode(2,2,0)
((driver_setup.irqm & 0x20) ? 0 : SA_INTERRUPT),
#else
0,
#endif
#endif
NAME53C8XX, np)) {
printk(KERN_ERR "%s: request irq %d failure\n",
ncr_name(np), device->slot.irq);
goto attach_error;
}
np->irq = device->slot.irq;
/*
** After SCSI devices have been opened, we cannot
** reset the bus safely, so we do it here.
** Interrupt handler does the real work.
** Process the reset exception,
** if interrupts are not enabled yet.
** Then enable disconnects.
*/
NCR_LOCK_NCB(np, flags);
if (ncr_reset_scsi_bus(np, 0, driver_setup.settle_delay) != 0) {
printk(KERN_ERR "%s: FATAL ERROR: CHECK SCSI BUS - CABLES, TERMINATION, DEVICE POWER etc.!\n", ncr_name(np));
NCR_UNLOCK_NCB(np, flags);
goto attach_error;
}
ncr_exception (np);
/*
** The middle-level SCSI driver does not
** wait for devices to settle.
** Wait synchronously if more than 2 seconds.
*/
if (driver_setup.settle_delay > 2) {
printk(KERN_INFO "%s: waiting %d seconds for scsi devices to settle...\n",
ncr_name(np), driver_setup.settle_delay);
MDELAY (1000 * driver_setup.settle_delay);
}
/*
** start the timeout daemon
*/
np->lasttime=0;
ncr_timeout (np);
/*
** use SIMPLE TAG messages by default
*/
#ifdef SCSI_NCR_ALWAYS_SIMPLE_TAG
np->order = M_SIMPLE_TAG;
#endif
/*
** Done.
** Fill Linux host instance structure
** and return success.
*/
instance->max_channel = 0;
instance->this_id = np->myaddr;
instance->max_id = np->maxwide ? 16 : 8;
instance->max_lun = MAX_LUN;
#ifndef SCSI_NCR_IOMAPPED
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,29)
instance->base = (unsigned long) np->reg;
#else
instance->base = (char *) np->reg;
#endif
#endif
instance->irq = np->irq;
instance->unique_id = np->base_io;
instance->io_port = np->base_io;
instance->n_io_port = np->base_ws;
instance->dma_channel = 0;
instance->cmd_per_lun = MAX_TAGS;
instance->can_queue = (MAX_START-4);
scsi_set_device(instance, &device->pdev->dev);
np->check_integrity = 0;
#ifdef SCSI_NCR_INTEGRITY_CHECKING
instance->check_integrity = 0;
#ifdef SCSI_NCR_ENABLE_INTEGRITY_CHECK
if ( !(driver_setup.bus_check & 0x04) ) {
np->check_integrity = 1;
instance->check_integrity = 1;
}
#endif
#endif
NCR_UNLOCK_NCB(np, flags);
/*
** Now let the generic SCSI driver
** look for the SCSI devices on the bus ..
*/
return 0;
attach_error:
if (!instance) return -1;
printk(KERN_INFO "%s: giving up ...\n", ncr_name(np));
if (np)
ncr_free_resources(np);
scsi_unregister(instance);
return -1;
}
/*
** Free controller resources.
*/
static void ncr_free_resources(ncb_p np)
{
ccb_p cp;
tcb_p tp;
lcb_p lp;
int target, lun;
if (np->irq)
free_irq(np->irq, np);
if (np->base_io)
release_region(np->base_io, np->base_ws);
#ifndef SCSI_NCR_PCI_MEM_NOT_SUPPORTED
if (np->base_va)
unmap_pci_mem(np->base_va, np->base_ws);
if (np->base2_va)
unmap_pci_mem(np->base2_va, np->base2_ws);
#endif
if (np->scripth0)
m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH");
if (np->script0)
m_free_dma(np->script0, sizeof(struct script), "SCRIPT");
if (np->squeue)
m_free_dma(np->squeue, sizeof(ncrcmd)*(MAX_START*2), "SQUEUE");
if (np->dqueue)
m_free_dma(np->dqueue, sizeof(ncrcmd)*(MAX_START*2),"DQUEUE");
while ((cp = np->ccbc) != NULL) {
np->ccbc = cp->link_ccb;
m_free_dma(cp, sizeof(*cp), "CCB");
}
if (np->badluntbl)
m_free_dma(np->badluntbl, 256,"BADLUNTBL");
for (target = 0; target < MAX_TARGET ; target++) {
tp = &np->target[target];
for (lun = 0 ; lun < MAX_LUN ; lun++) {
lp = ncr_lp(np, tp, lun);
if (!lp)
continue;
if (lp->tasktbl != &lp->tasktbl_0)
m_free_dma(lp->tasktbl, MAX_TASKS*4, "TASKTBL");
if (lp->cb_tags)
m_free(lp->cb_tags, MAX_TAGS, "CB_TAGS");
m_free_dma(lp, sizeof(*lp), "LCB");
}
#if MAX_LUN > 1
if (tp->lmp)
m_free(tp->lmp, MAX_LUN * sizeof(lcb_p), "LMP");
if (tp->luntbl)
m_free_dma(tp->luntbl, 256, "LUNTBL");
#endif
}
if (np->targtbl)
m_free_dma(np->targtbl, 256, "TARGTBL");
m_free_dma(np, sizeof(*np), "NCB");
}
/*==========================================================
**
**
** Done SCSI commands list management.
**
** We donnot enter the scsi_done() callback immediately
** after a command has been seen as completed but we
** insert it into a list which is flushed outside any kind
** of driver critical section.
** This allows to do minimal stuff under interrupt and
** inside critical sections and to also avoid locking up
** on recursive calls to driver entry points under SMP.
** In fact, the only kernel point which is entered by the
** driver with a driver lock set is get_free_pages(GFP_ATOMIC...)
** that shall not reenter the driver under any circumstance.
**
**==========================================================
*/
static inline void ncr_queue_done_cmd(ncb_p np, Scsi_Cmnd *cmd)
{
unmap_scsi_data(np, cmd);
cmd->host_scribble = (char *) np->done_list;
np->done_list = cmd;
}
static inline void ncr_flush_done_cmds(Scsi_Cmnd *lcmd)
{
Scsi_Cmnd *cmd;
while (lcmd) {
cmd = lcmd;
lcmd = (Scsi_Cmnd *) cmd->host_scribble;
cmd->scsi_done(cmd);
}
}
/*==========================================================
**
**
** Prepare the next negotiation message for integrity check,
** if needed.
**
** Fill in the part of message buffer that contains the
** negotiation and the nego_status field of the CCB.
** Returns the size of the message in bytes.
**
** If tp->ppr_negotiation is 1 and a M_REJECT occurs, then
** we disable ppr_negotiation. If the first ppr_negotiation is
** successful, set this flag to 2.
**
**==========================================================
*/
#ifdef SCSI_NCR_INTEGRITY_CHECKING
static int ncr_ic_nego(ncb_p np, ccb_p cp, Scsi_Cmnd *cmd, u_char *msgptr)
{
tcb_p tp = &np->target[cp->target];
int msglen = 0;
int nego = 0;
u_char new_width, new_offset, new_period;
u_char no_increase;
if (tp->ppr_negotiation == 1) /* PPR message successful */
tp->ppr_negotiation = 2;
if (tp->inq_done) {
if (!tp->ic_maximums_set) {
tp->ic_maximums_set = 1;
/*
* Check against target, host and user limits
*/
if ( (tp->inq_byte7 & INQ7_WIDE16) &&
np->maxwide && tp->usrwide)
tp->ic_max_width = 1;
else
tp->ic_max_width = 0;
if ((tp->inq_byte7 & INQ7_SYNC) && tp->maxoffs)
tp->ic_min_sync = (tp->minsync < np->minsync) ?
np->minsync : tp->minsync;
else
tp->ic_min_sync = 255;
tp->period = 1;
tp->widedone = 1;
/*
* Enable PPR negotiation - only if Ultra3 support
* is accessible.
*/
#if 0
if (tp->ic_max_width && (tp->ic_min_sync != 255 ))
tp->ppr_negotiation = 1;
#endif
tp->ppr_negotiation = 0;
if (np->features & FE_ULTRA3) {
if (tp->ic_max_width && (tp->ic_min_sync == 0x09))
tp->ppr_negotiation = 1;
}
if (!tp->ppr_negotiation)
cmd->ic_nego &= ~NS_PPR;
}
if (DEBUG_FLAGS & DEBUG_IC) {
printk("%s: cmd->ic_nego %d, 1st byte 0x%2X\n",
ncr_name(np), cmd->ic_nego, cmd->cmnd[0]);
}
/* Previous command recorded a parity or an initiator
* detected error condition. Force bus to narrow for this
* target. Clear flag. Negotation on request sense.
* Note: kernel forces 2 bus resets :o( but clears itself out.
* Minor bug? in scsi_obsolete.c (ugly)
*/
if (np->check_integ_par) {
printk("%s: Parity Error. Target set to narrow.\n",
ncr_name(np));
tp->ic_max_width = 0;
tp->widedone = tp->period = 0;
}
/* Initializing:
* If ic_nego == NS_PPR, we are in the initial test for
* PPR messaging support. If driver flag is clear, then
* either we don't support PPR nego (narrow or async device)
* or this is the second TUR and we have had a M. REJECT
* or unexpected disconnect on the first PPR negotiation.
* Do not negotiate, reset nego flags (in case a reset has
* occurred), clear ic_nego and return.
* General case: Kernel will clear flag on a fallback.
* Do only SDTR or WDTR in the future.
*/
if (!tp->ppr_negotiation && (cmd->ic_nego == NS_PPR )) {
tp->ppr_negotiation = 0;
cmd->ic_nego &= ~NS_PPR;
tp->widedone = tp->period = 1;
return msglen;
}
else if (( tp->ppr_negotiation && !(cmd->ic_nego & NS_PPR )) ||
(!tp->ppr_negotiation && (cmd->ic_nego & NS_PPR )) ) {
tp->ppr_negotiation = 0;
cmd->ic_nego &= ~NS_PPR;
}
/*
* Always check the PPR nego. flag bit if ppr_negotiation
* is set. If the ic_nego PPR bit is clear,
* there must have been a fallback. Do only
* WDTR / SDTR in the future.
*/
if ((tp->ppr_negotiation) && (!(cmd->ic_nego & NS_PPR)))
tp->ppr_negotiation = 0;
/* In case of a bus reset, ncr_negotiate will reset
* the flags tp->widedone and tp->period to 0, forcing
* a new negotiation. Do WDTR then SDTR. If PPR, do both.
* Do NOT increase the period. It is possible for the Scsi_Cmnd
* flags to be set to increase the period when a bus reset
* occurs - we don't want to change anything.
*/
no_increase = 0;
if (tp->ppr_negotiation && (!tp->widedone) && (!tp->period) ) {
cmd->ic_nego = NS_PPR;
tp->widedone = tp->period = 1;
no_increase = 1;
}
else if (!tp->widedone) {
cmd->ic_nego = NS_WIDE;
tp->widedone = 1;
no_increase = 1;
}
else if (!tp->period) {
cmd->ic_nego = NS_SYNC;
tp->period = 1;
no_increase = 1;
}
new_width = cmd->ic_nego_width & tp->ic_max_width;
switch (cmd->ic_nego_sync) {
case 2: /* increase the period */
if (!no_increase) {
if (tp->ic_min_sync <= 0x09)
tp->ic_min_sync = 0x0A;
else if (tp->ic_min_sync <= 0x0A)
tp->ic_min_sync = 0x0C;
else if (tp->ic_min_sync <= 0x0C)
tp->ic_min_sync = 0x19;
else if (tp->ic_min_sync <= 0x19)
tp->ic_min_sync *= 2;
else {
tp->ic_min_sync = 255;
cmd->ic_nego_sync = 0;
tp->maxoffs = 0;
}
}
new_period = tp->maxoffs?tp->ic_min_sync:0;
new_offset = tp->maxoffs;
break;
case 1: /* nego. to maximum */
new_period = tp->maxoffs?tp->ic_min_sync:0;
new_offset = tp->maxoffs;
break;
case 0: /* nego to async */
default:
new_period = 0;
new_offset = 0;
break;
};
nego = NS_NOCHANGE;
if (tp->ppr_negotiation) {
u_char options_byte = 0;
/*
** Must make sure data is consistent.
** If period is 9 and sync, must be wide and DT bit set.
** else period must be larger. If the width is 0,
** reset bus to wide but increase the period to 0x0A.
** Note: The strange else clause is due to the integrity check.
** If fails at 0x09, wide, the I.C. code will redo at the same
** speed but a narrow bus. The driver must take care of slowing
** the bus speed down.
**
** The maximum offset in ST mode is 31, in DT mode 62 (1010/1010_66 only)
*/
if ( (new_period==0x09) && new_offset) {
if (new_width)
options_byte = 0x02;
else {
tp->ic_min_sync = 0x0A;
new_period = 0x0A;
cmd->ic_nego_width = 1;
new_width = 1;
}
}
if (!options_byte && new_offset > np->maxoffs_st)
new_offset = np->maxoffs_st;
nego = NS_PPR;
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 6;
msgptr[msglen++] = M_X_PPR_REQ;
msgptr[msglen++] = new_period;
msgptr[msglen++] = 0;
msgptr[msglen++] = new_offset;
msgptr[msglen++] = new_width;
msgptr[msglen++] = options_byte;
}
else {
switch (cmd->ic_nego & ~NS_PPR) {
case NS_WIDE:
/*
** WDTR negotiation on if device supports
** wide or if wide device forced narrow
** due to a parity error.
*/
cmd->ic_nego_width &= tp->ic_max_width;
if (tp->ic_max_width | np->check_integ_par) {
nego = NS_WIDE;
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 2;
msgptr[msglen++] = M_X_WIDE_REQ;
msgptr[msglen++] = new_width;
}
break;
case NS_SYNC:
/*
** negotiate synchronous transfers
** Target must support sync transfers.
** Min. period = 0x0A, maximum offset of 31=0x1f.
*/
if (tp->inq_byte7 & INQ7_SYNC) {
if (new_offset && (new_period < 0x0A)) {
tp->ic_min_sync = 0x0A;
new_period = 0x0A;
}
if (new_offset > np->maxoffs_st)
new_offset = np->maxoffs_st;
nego = NS_SYNC;
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 3;
msgptr[msglen++] = M_X_SYNC_REQ;
msgptr[msglen++] = new_period;
msgptr[msglen++] = new_offset;
}
else
cmd->ic_nego_sync = 0;
break;
case NS_NOCHANGE:
break;
}
}
};
cp->nego_status = nego;
np->check_integ_par = 0;
if (nego) {
tp->nego_cp = cp;
if (DEBUG_FLAGS & DEBUG_NEGO) {
ncr_print_msg(cp, nego == NS_WIDE ?
"wide/narrow msgout":
(nego == NS_SYNC ? "sync/async msgout" : "ppr msgout"),
msgptr);
};
};
return msglen;
}
#endif /* SCSI_NCR_INTEGRITY_CHECKING */
/*==========================================================
**
**
** Prepare the next negotiation message if needed.
**
** Fill in the part of message buffer that contains the
** negotiation and the nego_status field of the CCB.
** Returns the size of the message in bytes.
**
**
**==========================================================
*/
static int ncr_prepare_nego(ncb_p np, ccb_p cp, u_char *msgptr)
{
tcb_p tp = &np->target[cp->target];
int msglen = 0;
int nego = 0;
u_char width, offset, factor, last_byte;
if (!np->check_integrity) {
/* If integrity checking disabled, enable PPR messaging
* if device supports wide, sync and ultra 3
*/
if (tp->ppr_negotiation == 1) /* PPR message successful */
tp->ppr_negotiation = 2;
if ((tp->inq_done) && (!tp->ic_maximums_set)) {
tp->ic_maximums_set = 1;
/*
* Issue PPR only if board is capable
* and set-up for Ultra3 transfers.
*/
tp->ppr_negotiation = 0;
if ( (np->features & FE_ULTRA3) &&
(tp->usrwide) && (tp->maxoffs) &&
(tp->minsync == 0x09) )
tp->ppr_negotiation = 1;
}
}
if (tp->inq_done) {
/*
* Get the current width, offset and period
*/
ncr_get_xfer_info( np, tp, &factor,
&offset, &width);
/*
** negotiate wide transfers ?
*/
if (!tp->widedone) {
if (tp->inq_byte7 & INQ7_WIDE16) {
if (tp->ppr_negotiation)
nego = NS_PPR;
else
nego = NS_WIDE;
width = tp->usrwide;
#ifdef SCSI_NCR_INTEGRITY_CHECKING
if (tp->ic_done)
width &= tp->ic_max_width;
#endif
} else
tp->widedone=1;
};
/*
** negotiate synchronous transfers?
*/
if ((nego != NS_WIDE) && !tp->period) {
if (tp->inq_byte7 & INQ7_SYNC) {
if (tp->ppr_negotiation)
nego = NS_PPR;
else
nego = NS_SYNC;
/* Check for async flag */
if (tp->maxoffs == 0) {
offset = 0;
factor = 0;
}
else {
offset = tp->maxoffs;
factor = tp->minsync;
#ifdef SCSI_NCR_INTEGRITY_CHECKING
if ((tp->ic_done) &&
(factor < tp->ic_min_sync))
factor = tp->ic_min_sync;
#endif
}
} else {
offset = 0;
factor = 0;
tp->period =0xffff;
PRINT_TARGET(np, cp->target);
printk ("target did not report SYNC.\n");
};
};
};
switch (nego) {
case NS_PPR:
/*
** Must make sure data is consistent.
** If period is 9 and sync, must be wide and DT bit set
** else period must be larger.
** Maximum offset is 31=0x1f is ST mode, 62 if DT mode
*/
last_byte = 0;
if ( (factor==9) && offset) {
if (!width) {
factor = 0x0A;
}
else
last_byte = 0x02;
}
if (!last_byte && offset > np->maxoffs_st)
offset = np->maxoffs_st;
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 6;
msgptr[msglen++] = M_X_PPR_REQ;
msgptr[msglen++] = factor;
msgptr[msglen++] = 0;
msgptr[msglen++] = offset;
msgptr[msglen++] = width;
msgptr[msglen++] = last_byte;
break;
case NS_SYNC:
/*
** Never negotiate faster than Ultra 2 (25ns periods)
*/
if (offset && (factor < 0x0A)) {
factor = 0x0A;
tp->minsync = 0x0A;
}
if (offset > np->maxoffs_st)
offset = np->maxoffs_st;
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 3;
msgptr[msglen++] = M_X_SYNC_REQ;
msgptr[msglen++] = factor;
msgptr[msglen++] = offset;
break;
case NS_WIDE:
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 2;
msgptr[msglen++] = M_X_WIDE_REQ;
msgptr[msglen++] = width;
break;
};
cp->nego_status = nego;
if (nego) {
tp->nego_cp = cp;
if (DEBUG_FLAGS & DEBUG_NEGO) {
ncr_print_msg(cp, nego == NS_WIDE ?
"wide msgout":
(nego == NS_SYNC ? "sync msgout" : "ppr msgout"),
msgptr);
};
};
return msglen;
}
/*==========================================================
**
**
** Start execution of a SCSI command.
** This is called from the generic SCSI driver.
**
**
**==========================================================
*/
static int ncr_queue_command (ncb_p np, Scsi_Cmnd *cmd)
{
/* Scsi_Device *device = cmd->device; */
tcb_p tp = &np->target[cmd->device->id];
lcb_p lp = ncr_lp(np, tp, cmd->device->lun);
ccb_p cp;
u_char idmsg, *msgptr;
u_int msglen;
int direction;
u_int32 lastp, goalp;
/*---------------------------------------------
**
** Some shortcuts ...
**
**---------------------------------------------
*/
if ((cmd->device->id == np->myaddr ) ||
(cmd->device->id >= MAX_TARGET) ||
(cmd->device->lun >= MAX_LUN )) {
return(DID_BAD_TARGET);
}
/*---------------------------------------------
**
** Complete the 1st TEST UNIT READY command
** with error condition if the device is
** flagged NOSCAN, in order to speed up
** the boot.
**
**---------------------------------------------
*/
if ((cmd->cmnd[0] == 0 || cmd->cmnd[0] == 0x12) &&
(tp->usrflag & UF_NOSCAN)) {
tp->usrflag &= ~UF_NOSCAN;
return DID_BAD_TARGET;
}
if (DEBUG_FLAGS & DEBUG_TINY) {
PRINT_ADDR(cmd);
printk ("CMD=%x ", cmd->cmnd[0]);
}
/*---------------------------------------------------
**
** Assign a ccb / bind cmd.
** If resetting, shorten settle_time if necessary
** in order to avoid spurious timeouts.
** If resetting or no free ccb,
** insert cmd into the waiting list.
**
**----------------------------------------------------
*/
if (np->settle_time && cmd->timeout_per_command >= HZ) {
u_long tlimit = ktime_get(cmd->timeout_per_command - HZ);
if (ktime_dif(np->settle_time, tlimit) > 0)
np->settle_time = tlimit;
}
if (np->settle_time || !(cp=ncr_get_ccb (np, cmd->device->id, cmd->device->lun))) {
insert_into_waiting_list(np, cmd);
return(DID_OK);
}
cp->cmd = cmd;
/*---------------------------------------------------
**
** Enable tagged queue if asked by scsi ioctl
**
**----------------------------------------------------
*/
#if 0 /* This stuff was only useful for linux-1.2.13 */
if (lp && !lp->numtags && cmd->device && cmd->device->tagged_queue) {
lp->numtags = tp->usrtags;
ncr_setup_tags (np, cp->target, cp->lun);
}
#endif
/*----------------------------------------------------
**
** Build the identify / tag / sdtr message
**
**----------------------------------------------------
*/
idmsg = M_IDENTIFY | cp->lun;
if (cp ->tag != NO_TAG || (lp && !(tp->usrflag & UF_NODISC)))
idmsg |= 0x40;
msgptr = cp->scsi_smsg;
msglen = 0;
msgptr[msglen++] = idmsg;
if (cp->tag != NO_TAG) {
char order = np->order;
/*
** Force ordered tag if necessary to avoid timeouts
** and to preserve interactivity.
*/
if (lp && ktime_exp(lp->tags_stime)) {
lp->tags_si = !(lp->tags_si);
if (lp->tags_sum[lp->tags_si]) {
order = M_ORDERED_TAG;
if ((DEBUG_FLAGS & DEBUG_TAGS)||bootverbose>0){
PRINT_ADDR(cmd);
printk("ordered tag forced.\n");
}
}
lp->tags_stime = ktime_get(3*HZ);
}
if (order == 0) {
/*
** Ordered write ops, unordered read ops.
*/
switch (cmd->cmnd[0]) {
case 0x08: /* READ_SMALL (6) */
case 0x28: /* READ_BIG (10) */
case 0xa8: /* READ_HUGE (12) */
order = M_SIMPLE_TAG;
break;
default:
order = M_ORDERED_TAG;
}
}
msgptr[msglen++] = order;
/*
** For less than 128 tags, actual tags are numbered
** 1,3,5,..2*MAXTAGS+1,since we may have to deal
** with devices that have problems with #TAG 0 or too
** great #TAG numbers. For more tags (up to 256),
** we use directly our tag number.
*/
#if MAX_TASKS > (512/4)
msgptr[msglen++] = cp->tag;
#else
msgptr[msglen++] = (cp->tag << 1) + 1;
#endif
}
cp->host_flags = 0;
/*----------------------------------------------------
**
** Build the data descriptors
**
**----------------------------------------------------
*/
direction = scsi_data_direction(cmd);
if (direction != SCSI_DATA_NONE) {
cp->segments = np->scatter (np, cp, cp->cmd);
if (cp->segments < 0) {
ncr_free_ccb(np, cp);
return(DID_ERROR);
}
}
else {
cp->data_len = 0;
cp->segments = 0;
}
/*---------------------------------------------------
**
** negotiation required?
**
** (nego_status is filled by ncr_prepare_nego())
**
**---------------------------------------------------
*/
cp->nego_status = 0;
#ifdef SCSI_NCR_INTEGRITY_CHECKING
if ((np->check_integrity && tp->ic_done) || !np->check_integrity) {
if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) {
msglen += ncr_prepare_nego (np, cp, msgptr + msglen);
}
}
else if (np->check_integrity && (cmd->ic_in_progress)) {
msglen += ncr_ic_nego (np, cp, cmd, msgptr + msglen);
}
else if (np->check_integrity && cmd->ic_complete) {
u_long current_period;
u_char current_offset, current_width, current_factor;
ncr_get_xfer_info (np, tp, &current_factor,
&current_offset, &current_width);
tp->ic_max_width = current_width;
tp->ic_min_sync = current_factor;
if (current_factor == 9) current_period = 125;
else if (current_factor == 10) current_period = 250;
else if (current_factor == 11) current_period = 303;
else if (current_factor == 12) current_period = 500;
else current_period = current_factor * 40;
/*
* Negotiation for this target is complete. Update flags.
*/
tp->period = current_period;
tp->widedone = 1;
tp->ic_done = 1;
printk("%s: Integrity Check Complete: \n", ncr_name(np));
printk("%s: %s %s SCSI", ncr_name(np),
current_offset?"SYNC":"ASYNC",
tp->ic_max_width?"WIDE":"NARROW");
if (current_offset) {
u_long mbs = 10000 * (tp->ic_max_width + 1);
printk(" %d.%d MB/s",
(int) (mbs / current_period), (int) (mbs % current_period));
printk(" (%d ns, %d offset)\n",
(int) current_period/10, current_offset);
}
else
printk(" %d MB/s. \n ", (tp->ic_max_width+1)*5);
}
#else
if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) {
msglen += ncr_prepare_nego (np, cp, msgptr + msglen);
}
#endif /* SCSI_NCR_INTEGRITY_CHECKING */
/*----------------------------------------------------
**
** Determine xfer direction.
**
**----------------------------------------------------
*/
if (!cp->data_len)
direction = SCSI_DATA_NONE;
/*
** If data direction is UNKNOWN, speculate DATA_READ
** but prepare alternate pointers for WRITE in case
** of our speculation will be just wrong.
** SCRIPTS will swap values if needed.
*/
switch(direction) {
case SCSI_DATA_UNKNOWN:
case SCSI_DATA_WRITE:
goalp = NCB_SCRIPT_PHYS (np, data_out2) + 8;
lastp = goalp - 8 - (cp->segments * (SCR_SG_SIZE*4));
if (direction != SCSI_DATA_UNKNOWN)
break;
cp->phys.header.wgoalp = cpu_to_scr(goalp);
cp->phys.header.wlastp = cpu_to_scr(lastp);
/* fall through */
case SCSI_DATA_READ:
cp->host_flags |= HF_DATA_IN;
goalp = NCB_SCRIPT_PHYS (np, data_in2) + 8;
lastp = goalp - 8 - (cp->segments * (SCR_SG_SIZE*4));
break;
default:
case SCSI_DATA_NONE:
lastp = goalp = NCB_SCRIPTH_PHYS (np, no_data);
break;
}
/*
** Set all pointers values needed by SCRIPTS.
** If direction is unknown, start at data_io.
*/
cp->phys.header.lastp = cpu_to_scr(lastp);
cp->phys.header.goalp = cpu_to_scr(goalp);
if (direction == SCSI_DATA_UNKNOWN)
cp->phys.header.savep =
cpu_to_scr(NCB_SCRIPTH_PHYS (np, data_io));
else
cp->phys.header.savep= cpu_to_scr(lastp);
/*
** Save the initial data pointer in order to be able
** to redo the command.
** We also have to save the initial lastp, since it
** will be changed to DATA_IO if we don't know the data
** direction and the device completes the command with
** QUEUE FULL status (without entering the data phase).
*/
cp->startp = cp->phys.header.savep;
cp->lastp0 = cp->phys.header.lastp;
/*----------------------------------------------------
**
** fill in ccb
**
**----------------------------------------------------
**
**
** physical -> virtual backlink
** Generic SCSI command
*/
/*
** Startqueue
*/
cp->phys.header.go.start = cpu_to_scr(NCB_SCRIPT_PHYS (np,select));
cp->phys.header.go.restart = cpu_to_scr(NCB_SCRIPT_PHYS (np,resel_dsa));
/*
** select
*/
cp->phys.select.sel_id = cp->target;
cp->phys.select.sel_scntl3 = tp->wval;
cp->phys.select.sel_sxfer = tp->sval;
cp->phys.select.sel_scntl4 = tp->uval;
/*
** message
*/
cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg));
cp->phys.smsg.size = cpu_to_scr(msglen);
/*
** command
*/
memcpy(cp->cdb_buf, cmd->cmnd, MIN(cmd->cmd_len, sizeof(cp->cdb_buf)));
cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, cdb_buf[0]));
cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
/*
** status
*/
cp->actualquirks = tp->quirks;
cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
cp->scsi_status = S_ILLEGAL;
cp->xerr_status = 0;
cp->extra_bytes = 0;
/*
** extreme data pointer.
** shall be positive, so -1 is lower than lowest.:)
*/
cp->ext_sg = -1;
cp->ext_ofs = 0;
/*----------------------------------------------------
**
** Critical region: start this job.
**
**----------------------------------------------------
*/
/*
** activate this job.
*/
/*
** insert next CCBs into start queue.
** 2 max at a time is enough to flush the CCB wait queue.
*/
if (lp)
ncr_start_next_ccb(np, lp, 2);
else
ncr_put_start_queue(np, cp);
/*
** Command is successfully queued.
*/
return(DID_OK);
}
/*==========================================================
**
**
** Insert a CCB into the start queue and wake up the
** SCRIPTS processor.
**
**
**==========================================================
*/
static void ncr_start_next_ccb(ncb_p np, lcb_p lp, int maxn)
{
XPT_QUEHEAD *qp;
ccb_p cp;
while (maxn-- && lp->queuedccbs < lp->queuedepth) {
qp = xpt_remque_head(&lp->wait_ccbq);
if (!qp)
break;
++lp->queuedccbs;
cp = xpt_que_entry(qp, struct ccb, link_ccbq);
xpt_insque_tail(qp, &lp->busy_ccbq);
lp->tasktbl[cp->tag == NO_TAG ? 0 : cp->tag] =
cpu_to_scr(cp->p_ccb);
ncr_put_start_queue(np, cp);
}
}
static void ncr_put_start_queue(ncb_p np, ccb_p cp)
{
u_short qidx;
#ifdef SCSI_NCR_IARB_SUPPORT
/*
** If the previously queued CCB is not yet done,
** set the IARB hint. The SCRIPTS will go with IARB
** for this job when starting the previous one.
** We leave devices a chance to win arbitration by
** not using more than 'iarb_max' consecutive
** immediate arbitrations.
*/
if (np->last_cp && np->iarb_count < np->iarb_max) {
np->last_cp->host_flags |= HF_HINT_IARB;
++np->iarb_count;
}
else
np->iarb_count = 0;
np->last_cp = cp;
#endif
/*
** insert into start queue.
*/
qidx = np->squeueput + 2;
if (qidx >= MAX_START*2) qidx = 0;
np->squeue [qidx] = cpu_to_scr(np->p_idletask);
MEMORY_BARRIER();
np->squeue [np->squeueput] = cpu_to_scr(cp->p_ccb);
np->squeueput = qidx;
cp->queued = 1;
if (DEBUG_FLAGS & DEBUG_QUEUE)
printk ("%s: queuepos=%d.\n", ncr_name (np), np->squeueput);
/*
** Script processor may be waiting for reselect.
** Wake it up.
*/
MEMORY_BARRIER();
OUTB (nc_istat, SIGP|np->istat_sem);
}
/*==========================================================
**
** Soft reset the chip.
**
** Some 896 and 876 chip revisions may hang-up if we set
** the SRST (soft reset) bit at the wrong time when SCRIPTS
** are running.
** So, we need to abort the current operation prior to
** soft resetting the chip.
**
**==========================================================
*/
static void ncr_chip_reset (ncb_p np)
{
OUTB (nc_istat, SRST);
UDELAY (10);
OUTB (nc_istat, 0);
}
static void ncr_soft_reset(ncb_p np)
{
u_char istat;
int i;
if (!(np->features & FE_ISTAT1) || !(INB (nc_istat1) & SRUN))
goto do_chip_reset;
OUTB (nc_istat, CABRT);
for (i = 100000 ; i ; --i) {
istat = INB (nc_istat);
if (istat & SIP) {
INW (nc_sist);
}
else if (istat & DIP) {
if (INB (nc_dstat) & ABRT)
break;
}
UDELAY(5);
}
OUTB (nc_istat, 0);
if (!i)
printk("%s: unable to abort current chip operation, "
"ISTAT=0x%02x.\n", ncr_name(np), istat);
do_chip_reset:
ncr_chip_reset(np);
}
/*==========================================================
**
**
** Start reset process.
** The interrupt handler will reinitialize the chip.
** The timeout handler will wait for settle_time before
** clearing it and so resuming command processing.
**
**
**==========================================================
*/
static void ncr_start_reset(ncb_p np)
{
(void) ncr_reset_scsi_bus(np, 1, driver_setup.settle_delay);
}
static int ncr_reset_scsi_bus(ncb_p np, int enab_int, int settle_delay)
{
u_int32 term;
int retv = 0;
np->settle_time = ktime_get(settle_delay * HZ);
if (bootverbose > 1)
printk("%s: resetting, "
"command processing suspended for %d seconds\n",
ncr_name(np), settle_delay);
ncr_soft_reset(np); /* Soft reset the chip */
UDELAY (2000); /* The 895/6 need time for the bus mode to settle */
if (enab_int)
OUTW (nc_sien, RST);
/*
** Enable Tolerant, reset IRQD if present and
** properly set IRQ mode, prior to resetting the bus.
*/
OUTB (nc_stest3, TE);
OUTB (nc_dcntl, (np->rv_dcntl & IRQM));
OUTB (nc_scntl1, CRST);
UDELAY (200);
if (!driver_setup.bus_check)
goto out;
/*
** Check for no terminators or SCSI bus shorts to ground.
** Read SCSI data bus, data parity bits and control signals.
** We are expecting RESET to be TRUE and other signals to be
** FALSE.
*/
term = INB(nc_sstat0);
term = ((term & 2) << 7) + ((term & 1) << 17); /* rst sdp0 */
term |= ((INB(nc_sstat2) & 0x01) << 26) | /* sdp1 */
((INW(nc_sbdl) & 0xff) << 9) | /* d7-0 */
((INW(nc_sbdl) & 0xff00) << 10) | /* d15-8 */
INB(nc_sbcl); /* req ack bsy sel atn msg cd io */
if (!(np->features & FE_WIDE))
term &= 0x3ffff;
if (term != (2<<7)) {
printk("%s: suspicious SCSI data while resetting the BUS.\n",
ncr_name(np));
printk("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
"0x%lx, expecting 0x%lx\n",
ncr_name(np),
(np->features & FE_WIDE) ? "dp1,d15-8," : "",
(u_long)term, (u_long)(2<<7));
if (driver_setup.bus_check == 1)
retv = 1;
}
out:
OUTB (nc_scntl1, 0);
return retv;
}
/*==========================================================
**
**
** Reset the SCSI BUS.
** This is called from the generic SCSI driver.
**
**
**==========================================================
*/
static int ncr_reset_bus (ncb_p np, Scsi_Cmnd *cmd, int sync_reset)
{
/* Scsi_Device *device = cmd->device; */
ccb_p cp;
int found;
/*
* Return immediately if reset is in progress.
*/
if (np->settle_time) {
return SCSI_RESET_PUNT;
}
/*
* Start the reset process.
* The script processor is then assumed to be stopped.
* Commands will now be queued in the waiting list until a settle
* delay of 2 seconds will be completed.
*/
ncr_start_reset(np);
/*
* First, look in the wakeup list
*/
for (found=0, cp=np->ccbc; cp; cp=cp->link_ccb) {
/*
** look for the ccb of this command.
*/
if (cp->host_status == HS_IDLE) continue;
if (cp->cmd == cmd) {
found = 1;
break;
}
}
/*
* Then, look in the waiting list
*/
if (!found && retrieve_from_waiting_list(0, np, cmd))
found = 1;
/*
* Wake-up all awaiting commands with DID_RESET.
*/
reset_waiting_list(np);
/*
* Wake-up all pending commands with HS_RESET -> DID_RESET.
*/
ncr_wakeup(np, HS_RESET);
/*
* If the involved command was not in a driver queue, and the
* scsi driver told us reset is synchronous, and the command is not
* currently in the waiting list, complete it with DID_RESET status,
* in order to keep it alive.
*/
if (!found && sync_reset && !retrieve_from_waiting_list(0, np, cmd)) {
SetScsiResult(cmd, DID_RESET, 0);
ncr_queue_done_cmd(np, cmd);
}
return SCSI_RESET_SUCCESS;
}
/*==========================================================
**
**
** Abort an SCSI command.
** This is called from the generic SCSI driver.
**
**
**==========================================================
*/
static int ncr_abort_command (ncb_p np, Scsi_Cmnd *cmd)
{
/* Scsi_Device *device = cmd->device; */
ccb_p cp;
/*
* First, look for the scsi command in the waiting list
*/
if (remove_from_waiting_list(np, cmd)) {
SetScsiAbortResult(cmd);
ncr_queue_done_cmd(np, cmd);
return SCSI_ABORT_SUCCESS;
}
/*
* Then, look in the wakeup list
*/
for (cp=np->ccbc; cp; cp=cp->link_ccb) {
/*
** look for the ccb of this command.
*/
if (cp->host_status == HS_IDLE) continue;
if (cp->cmd == cmd)
break;
}
if (!cp) {
return SCSI_ABORT_NOT_RUNNING;
}
/*
** Keep track we have to abort this job.
*/
cp->to_abort = 1;
/*
** Tell the SCRIPTS processor to stop
** and synchronize with us.
*/
np->istat_sem = SEM;
/*
** If there are no requests, the script
** processor will sleep on SEL_WAIT_RESEL.
** Let's wake it up, since it may have to work.
*/
OUTB (nc_istat, SIGP|SEM);
/*
** Tell user we are working for him.
*/
return SCSI_ABORT_PENDING;
}
/*==========================================================
**
** Linux release module stuff.
**
** Called before unloading the module
** Detach the host.
** We have to free resources and halt the NCR chip
**
**==========================================================
*/
static int ncr_detach(ncb_p np)
{
int i;
printk("%s: detaching ...\n", ncr_name(np));
/*
** Stop the ncr_timeout process
** Set release_stage to 1 and wait that ncr_timeout() set it to 2.
*/
np->release_stage = 1;
for (i = 50 ; i && np->release_stage != 2 ; i--) MDELAY (100);
if (np->release_stage != 2)
printk("%s: the timer seems to be already stopped\n",
ncr_name(np));
else np->release_stage = 2;
/*
** Reset NCR chip.
** We should use ncr_soft_reset(), but we donnot want to do
** so, since we may not be safe if interrupts occur.
*/
printk("%s: resetting chip\n", ncr_name(np));
ncr_chip_reset(np);
/*
** Restore bios setting for automatic clock detection.
*/
OUTB(nc_dmode, np->sv_dmode);
OUTB(nc_dcntl, np->sv_dcntl);
OUTB(nc_ctest3, np->sv_ctest3);
OUTB(nc_ctest4, np->sv_ctest4);
OUTB(nc_ctest5, np->sv_ctest5);
OUTB(nc_gpcntl, np->sv_gpcntl);
OUTB(nc_stest2, np->sv_stest2);
ncr_selectclock(np, np->sv_scntl3);
/*
** Free host resources
*/
ncr_free_resources(np);
return 1;
}
/*==========================================================
**
**
** Complete execution of a SCSI command.
** Signal completion to the generic SCSI driver.
**
**
**==========================================================
*/
void ncr_complete (ncb_p np, ccb_p cp)
{
Scsi_Cmnd *cmd;
tcb_p tp;
lcb_p lp;
/*
** Sanity check
*/
if (!cp || !cp->cmd)
return;
/*
** Print some debugging info.
*/
if (DEBUG_FLAGS & DEBUG_TINY)
printk ("CCB=%lx STAT=%x/%x\n", (unsigned long)cp,
cp->host_status,cp->scsi_status);
/*
** Get command, target and lun pointers.
*/
cmd = cp->cmd;
cp->cmd = NULL;
tp = &np->target[cp->target];
lp = ncr_lp(np, tp, cp->lun);
/*
** We donnot queue more than 1 ccb per target
** with negotiation at any time. If this ccb was
** used for negotiation, clear this info in the tcb.
*/
if (cp == tp->nego_cp)
tp->nego_cp = 0;
#ifdef SCSI_NCR_IARB_SUPPORT
/*
** We just complete the last queued CCB.
** Clear this info that is no more relevant.
*/
if (cp == np->last_cp)
np->last_cp = 0;
#endif
/*
** If auto-sense performed, change scsi status,
** Otherwise, compute the residual.
*/
if (cp->host_flags & HF_AUTO_SENSE) {
cp->scsi_status = cp->sv_scsi_status;
cp->xerr_status = cp->sv_xerr_status;
}
else {
cp->resid = 0;
if (cp->xerr_status ||
cp->phys.header.lastp != cp->phys.header.goalp)
cp->resid = ncr_compute_residual(np, cp);
}
/*
** Check for extended errors.
*/
if (cp->xerr_status) {
if (cp->xerr_status & XE_PARITY_ERR) {
PRINT_ADDR(cmd);
printk ("unrecovered SCSI parity error.\n");
}
if (cp->xerr_status & XE_EXTRA_DATA) {
PRINT_ADDR(cmd);
printk ("extraneous data discarded.\n");
}
if (cp->xerr_status & XE_BAD_PHASE) {
PRINT_ADDR(cmd);
printk ("illegal scsi phase (4/5).\n");
}
if (cp->xerr_status & XE_SODL_UNRUN) {
PRINT_ADDR(cmd);
printk ("ODD transfer in DATA OUT phase.\n");
}
if (cp->xerr_status & XE_SWIDE_OVRUN){
PRINT_ADDR(cmd);
printk ("ODD transfer in DATA IN phase.\n");
}
if (cp->host_status==HS_COMPLETE)
cp->host_status = HS_FAIL;
}
/*
** Print out any error for debugging purpose.
*/
if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
if (cp->host_status!=HS_COMPLETE || cp->scsi_status!=S_GOOD ||
cp->resid) {
PRINT_ADDR(cmd);
printk ("ERROR: cmd=%x host_status=%x scsi_status=%x "
"data_len=%d residual=%d\n",
cmd->cmnd[0], cp->host_status, cp->scsi_status,
cp->data_len, cp->resid);
}
}
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,99)
/*
** Move residual byte count to user structure.
*/
cmd->resid = cp->resid;
#endif
/*
** Check the status.
*/
if ( (cp->host_status == HS_COMPLETE)
&& (cp->scsi_status == S_GOOD ||
cp->scsi_status == S_COND_MET)) {
/*
** All went well (GOOD status).
** CONDITION MET status is returned on
** `Pre-Fetch' or `Search data' success.
*/
SetScsiResult(cmd, DID_OK, cp->scsi_status);
/*
** Allocate the lcb if not yet.
*/
if (!lp)
ncr_alloc_lcb (np, cp->target, cp->lun);
/*
** On standard INQUIRY response (EVPD and CmDt
** not set), setup logical unit according to
** announced capabilities (we need the 1rst 8 bytes).
*/
if (cmd->cmnd[0] == 0x12 && !(cmd->cmnd[1] & 0x3) &&
cmd->request_bufflen - cp->resid > 7 && !cmd->use_sg) {
sync_scsi_data(np, cmd); /* SYNC the data */
ncr_setup_lcb (np, cp->target, cp->lun,
(char *) cmd->request_buffer);
}
/*
** If tags was reduced due to queue full,
** increase tags if 1000 good status received.
*/
if (lp && lp->usetags && lp->numtags < lp->maxtags) {
++lp->num_good;
if (lp->num_good >= 1000) {
lp->num_good = 0;
++lp->numtags;
ncr_setup_tags (np, cp->target, cp->lun);
}
}
} else if ((cp->host_status == HS_COMPLETE)
&& (cp->scsi_status == S_CHECK_COND)) {
/*
** Check condition code
*/
SetScsiResult(cmd, DID_OK, S_CHECK_COND);
if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
PRINT_ADDR(cmd);
ncr_printl_hex("sense data:", cmd->sense_buffer, 14);
}
} else if ((cp->host_status == HS_COMPLETE)
&& (cp->scsi_status == S_CONFLICT)) {
/*
** Reservation Conflict condition code
*/
SetScsiResult(cmd, DID_OK, S_CONFLICT);
} else if ((cp->host_status == HS_COMPLETE)
&& (cp->scsi_status == S_BUSY ||
cp->scsi_status == S_QUEUE_FULL)) {
/*
** Target is busy.
*/
SetScsiResult(cmd, DID_OK, cp->scsi_status);
} else if ((cp->host_status == HS_SEL_TIMEOUT)
|| (cp->host_status == HS_TIMEOUT)) {
/*
** No response
*/
SetScsiResult(cmd, DID_TIME_OUT, cp->scsi_status);
} else if (cp->host_status == HS_RESET) {
/*
** SCSI bus reset
*/
SetScsiResult(cmd, DID_RESET, cp->scsi_status);
} else if (cp->host_status == HS_ABORTED) {
/*
** Transfer aborted
*/
SetScsiAbortResult(cmd);
} else {
int did_status;
/*
** Other protocol messes
*/
PRINT_ADDR(cmd);
printk ("COMMAND FAILED (%x %x) @%p.\n",
cp->host_status, cp->scsi_status, cp);
did_status = DID_ERROR;
if (cp->xerr_status & XE_PARITY_ERR)
did_status = DID_PARITY;
SetScsiResult(cmd, did_status, cp->scsi_status);
}
/*
** trace output
*/
if (tp->usrflag & UF_TRACE) {
PRINT_ADDR(cmd);
printk (" CMD:");
ncr_print_hex(cmd->cmnd, cmd->cmd_len);
if (cp->host_status==HS_COMPLETE) {
switch (cp->scsi_status) {
case S_GOOD:
printk (" GOOD");
break;
case S_CHECK_COND:
printk (" SENSE:");
ncr_print_hex(cmd->sense_buffer, 14);
break;
default:
printk (" STAT: %x\n", cp->scsi_status);
break;
}
} else printk (" HOSTERROR: %x", cp->host_status);
printk ("\n");
}
/*
** Free this ccb
*/
ncr_free_ccb (np, cp);
/*
** requeue awaiting scsi commands for this lun.
*/
if (lp && lp->queuedccbs < lp->queuedepth &&
!xpt_que_empty(&lp->wait_ccbq))
ncr_start_next_ccb(np, lp, 2);
/*
** requeue awaiting scsi commands for this controller.
*/
if (np->waiting_list)
requeue_waiting_list(np);
/*
** signal completion to generic driver.
*/
ncr_queue_done_cmd(np, cmd);
}
/*==========================================================
**
**
** Signal all (or one) control block done.
**
**
**==========================================================
*/
/*
** The NCR has completed CCBs.
** Look at the DONE QUEUE.
**
** On architectures that may reorder LOAD/STORE operations,
** a memory barrier may be needed after the reading of the
** so-called `flag' and prior to dealing with the data.
*/
int ncr_wakeup_done (ncb_p np)
{
ccb_p cp;
int i, n;
u_long dsa;
n = 0;
i = np->dqueueget;
while (1) {
dsa = scr_to_cpu(np->dqueue[i]);
if (!dsa)
break;
np->dqueue[i] = 0;
if ((i = i+2) >= MAX_START*2)
i = 0;
cp = ncr_ccb_from_dsa(np, dsa);
if (cp) {
MEMORY_BARRIER();
ncr_complete (np, cp);
++n;
}
else
printk (KERN_ERR "%s: bad DSA (%lx) in done queue.\n",
ncr_name(np), dsa);
}
np->dqueueget = i;
return n;
}
/*
** Complete all active CCBs.
*/
void ncr_wakeup (ncb_p np, u_long code)
{
ccb_p cp = np->ccbc;
while (cp) {
if (cp->host_status != HS_IDLE) {
cp->host_status = code;
ncr_complete (np, cp);
}
cp = cp->link_ccb;
}
}
/*==========================================================
**
**
** Start NCR chip.
**
**
**==========================================================
*/
void ncr_init (ncb_p np, int reset, char * msg, u_long code)
{
int i;
u_long phys;
/*
** Reset chip if asked, otherwise just clear fifos.
*/
if (reset)
ncr_soft_reset(np);
else {
OUTB (nc_stest3, TE|CSF);
OUTONB (nc_ctest3, CLF);
}
/*
** Message.
*/
if (msg) printk (KERN_INFO "%s: restart (%s).\n", ncr_name (np), msg);
/*
** Clear Start Queue
*/
phys = np->p_squeue;
np->queuedepth = MAX_START - 1; /* 1 entry needed as end marker */
for (i = 0; i < MAX_START*2; i += 2) {
np->squeue[i] = cpu_to_scr(np->p_idletask);
np->squeue[i+1] = cpu_to_scr(phys + (i+2)*4);
}
np->squeue[MAX_START*2-1] = cpu_to_scr(phys);
/*
** Start at first entry.
*/
np->squeueput = 0;
np->scripth0->startpos[0] = cpu_to_scr(phys);
/*
** Clear Done Queue
*/
phys = vtobus(np->dqueue);
for (i = 0; i < MAX_START*2; i += 2) {
np->dqueue[i] = 0;
np->dqueue[i+1] = cpu_to_scr(phys + (i+2)*4);
}
np->dqueue[MAX_START*2-1] = cpu_to_scr(phys);
/*
** Start at first entry.
*/
np->scripth0->done_pos[0] = cpu_to_scr(phys);
np->dqueueget = 0;
/*
** Wakeup all pending jobs.
*/
ncr_wakeup (np, code);
/*
** Init chip.
*/
OUTB (nc_istat, 0x00 ); /* Remove Reset, abort */
UDELAY (2000); /* The 895 needs time for the bus mode to settle */
OUTB (nc_scntl0, np->rv_scntl0 | 0xc0);
/* full arb., ena parity, par->ATN */
OUTB (nc_scntl1, 0x00); /* odd parity, and remove CRST!! */
ncr_selectclock(np, np->rv_scntl3); /* Select SCSI clock */
OUTB (nc_scid , RRE|np->myaddr); /* Adapter SCSI address */
OUTW (nc_respid, 1ul<<np->myaddr); /* Id to respond to */
OUTB (nc_istat , SIGP ); /* Signal Process */
OUTB (nc_dmode , np->rv_dmode); /* Burst length, dma mode */
OUTB (nc_ctest5, np->rv_ctest5); /* Large fifo + large burst */
OUTB (nc_dcntl , NOCOM|np->rv_dcntl); /* Protect SFBR */
OUTB (nc_ctest3, np->rv_ctest3); /* Write and invalidate */
OUTB (nc_ctest4, np->rv_ctest4); /* Master parity checking */
if ((np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66)){
OUTB (nc_stest2, EXT|np->rv_stest2);
/* Extended Sreq/Sack filtering, not supported in C1010/C1010_66 */
}
OUTB (nc_stest3, TE); /* TolerANT enable */
OUTB (nc_stime0, 0x0c); /* HTH disabled STO 0.25 sec */
/*
** DEL 441 - 53C876 Rev 5 - Part Number 609-0392787/2788 - ITEM 2.
** Disable overlapped arbitration for all dual-function
** devices, regardless revision id.
** We may consider it is a post-chip-design feature. ;-)
**
** Errata applies to all 896 and 1010 parts.
*/
if (np->device_id == PCI_DEVICE_ID_NCR_53C875)
OUTB (nc_ctest0, (1<<5));
else if (np->device_id == PCI_DEVICE_ID_NCR_53C896 ||
np->device_id == PCI_DEVICE_ID_LSI_53C1010 ||
np->device_id == PCI_DEVICE_ID_LSI_53C1010_66 )
np->rv_ccntl0 |= DPR;
/*
** C1010_66MHz rev 0 part requies AIPCNTL1 bit 3 to be set.
*/
if (np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)
OUTB(nc_aipcntl1, (1<<3));
/*
** Write CCNTL0/CCNTL1 for chips capable of 64 bit addressing
** and/or hardware phase mismatch, since only such chips
** seem to support those IO registers.
*/
if (np->features & (FE_DAC | FE_NOPM)) {
OUTB (nc_ccntl0, np->rv_ccntl0);
OUTB (nc_ccntl1, np->rv_ccntl1);
}
/*
** If phase mismatch handled by scripts (53C895A or 53C896
** or 53C1010 or 53C1010_66), set PM jump addresses.
*/
if (np->features & FE_NOPM) {
printk(KERN_INFO "%s: handling phase mismatch from SCRIPTS.\n",
ncr_name(np));
OUTL (nc_pmjad1, NCB_SCRIPTH_PHYS (np, pm_handle));
OUTL (nc_pmjad2, NCB_SCRIPTH_PHYS (np, pm_handle));
}
/*
** Enable GPIO0 pin for writing if LED support from SCRIPTS.
** Also set GPIO5 and clear GPIO6 if hardware LED control.
*/
if (np->features & FE_LED0)
OUTB(nc_gpcntl, INB(nc_gpcntl) & ~0x01);
else if (np->features & FE_LEDC)
OUTB(nc_gpcntl, (INB(nc_gpcntl) & ~0x41) | 0x20);
/*
** enable ints
*/
OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST|PAR);
OUTB (nc_dien , MDPE|BF|SSI|SIR|IID);
/*
** For 895/895A/896/c1010
** Enable SBMC interrupt and save current SCSI bus mode.
*/
if ( (np->features & FE_ULTRA2) || (np->features & FE_ULTRA3) ) {
OUTONW (nc_sien, SBMC);
np->scsi_mode = INB (nc_stest4) & SMODE;
}
/*
** Fill in target structure.
** Reinitialize usrsync.
** Reinitialize usrwide.
** Prepare sync negotiation according to actual SCSI bus mode.
*/
for (i=0;i<MAX_TARGET;i++) {
tcb_p tp = &np->target[i];
tp->to_reset = 0;
tp->sval = 0;
tp->wval = np->rv_scntl3;
tp->uval = np->rv_scntl4;
if (tp->usrsync != 255) {
if (tp->usrsync <= np->maxsync) {
if (tp->usrsync < np->minsync) {
tp->usrsync = np->minsync;
}
}
else
tp->usrsync = 255;
};
if (tp->usrwide > np->maxwide)
tp->usrwide = np->maxwide;
ncr_negotiate (np, tp);
}
/*
** Download SCSI SCRIPTS to on-chip RAM if present,
** and start script processor.
** We do the download preferently from the CPU.
** For platforms that may not support PCI memory mapping,
** we use a simple SCRIPTS that performs MEMORY MOVEs.
*/
if (np->base2_ba) {
if (bootverbose)
printk ("%s: Downloading SCSI SCRIPTS.\n",
ncr_name(np));
#ifdef SCSI_NCR_PCI_MEM_NOT_SUPPORTED
if (np->base2_ws == 8192)
phys = NCB_SCRIPTH0_PHYS (np, start_ram64);
else
phys = NCB_SCRIPTH_PHYS (np, start_ram);
#else
if (np->base2_ws == 8192) {
memcpy_to_pci(np->base2_va + 4096,
np->scripth0, sizeof(struct scripth));
OUTL (nc_mmws, np->scr_ram_seg);
OUTL (nc_mmrs, np->scr_ram_seg);
OUTL (nc_sfs, np->scr_ram_seg);
phys = NCB_SCRIPTH_PHYS (np, start64);
}
else
phys = NCB_SCRIPT_PHYS (np, init);
memcpy_to_pci(np->base2_va, np->script0, sizeof(struct script));
#endif /* SCSI_NCR_PCI_MEM_NOT_SUPPORTED */
}
else
phys = NCB_SCRIPT_PHYS (np, init);
np->istat_sem = 0;
OUTL (nc_dsa, np->p_ncb);
OUTL_DSP (phys);
}
/*==========================================================
**
** Prepare the negotiation values for wide and
** synchronous transfers.
**
**==========================================================
*/
static void ncr_negotiate (struct ncb* np, struct tcb* tp)
{
/*
** minsync unit is 4ns !
*/
u_long minsync = tp->usrsync;
/*
** SCSI bus mode limit
*/
if (np->scsi_mode && np->scsi_mode == SMODE_SE) {
if (minsync < 12) minsync = 12;
}
/*
** our limit ..
*/
if (minsync < np->minsync)
minsync = np->minsync;
/*
** divider limit
*/
if (minsync > np->maxsync)
minsync = 255;
tp->minsync = minsync;
tp->maxoffs = (minsync<255 ? np->maxoffs : 0);
/*
** period=0: has to negotiate sync transfer
*/
tp->period=0;
/*
** widedone=0: has to negotiate wide transfer
*/
tp->widedone=0;
}
/*==========================================================
**
** Get clock factor and sync divisor for a given
** synchronous factor period.
** Returns the clock factor (in sxfer) and scntl3
** synchronous divisor field.
**
**==========================================================
*/
static void ncr_getsync(ncb_p np, u_char sfac, u_char *fakp, u_char *scntl3p)
{
u_long clk = np->clock_khz; /* SCSI clock frequency in kHz */
int div = np->clock_divn; /* Number of divisors supported */
u_long fak; /* Sync factor in sxfer */
u_long per; /* Period in tenths of ns */
u_long kpc; /* (per * clk) */
/*
** Compute the synchronous period in tenths of nano-seconds
** from sfac.
**
** Note, if sfac == 9, DT is being used. Double the period of 125
** to 250.
*/
if (sfac <= 10) per = 250;
else if (sfac == 11) per = 303;
else if (sfac == 12) per = 500;
else per = 40 * sfac;
/*
** Look for the greatest clock divisor that allows an
** input speed faster than the period.
*/
kpc = per * clk;
while (--div >= 0)
if (kpc >= (div_10M[div] << 2)) break;
/*
** Calculate the lowest clock factor that allows an output
** speed not faster than the period.
*/
fak = (kpc - 1) / div_10M[div] + 1;
#if 0 /* This optimization does not seem very useful */
per = (fak * div_10M[div]) / clk;
/*
** Why not to try the immediate lower divisor and to choose
** the one that allows the fastest output speed ?
** We don't want input speed too much greater than output speed.
*/
if (div >= 1 && fak < 8) {
u_long fak2, per2;
fak2 = (kpc - 1) / div_10M[div-1] + 1;
per2 = (fak2 * div_10M[div-1]) / clk;
if (per2 < per && fak2 <= 8) {
fak = fak2;
per = per2;
--div;
}
}
#endif
if (fak < 4) fak = 4; /* Should never happen, too bad ... */
/*
** Compute and return sync parameters for the ncr
*/
*fakp = fak - 4;
/*
** If sfac < 25, and 8xx parts, desire that the chip operate at
** least at Ultra speeds. Must set bit 7 of scntl3.
** For C1010, do not set this bit. If operating at Ultra3 speeds,
** set the U3EN bit instead.
*/
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)) {
*scntl3p = (div+1) << 4;
*fakp = 0;
}
else {
*scntl3p = ((div+1) << 4) + (sfac < 25 ? 0x80 : 0);
*fakp = fak - 4;
}
}
/*==========================================================
**
** Utility routine to return the current bus width
** synchronous period and offset.
** Utilizes target sval, wval and uval
**
**==========================================================
*/
static void ncr_get_xfer_info(ncb_p np, tcb_p tp, u_char *factor,
u_char *offset, u_char *width)
{
u_char idiv;
u_long period;
*width = (tp->wval & EWS) ? 1 : 0;
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66))
*offset = (tp->sval & 0x3f);
else
*offset = (tp->sval & 0x1f);
/*
* Midlayer signal to the driver that all of the scsi commands
* for the integrity check have completed. Save the negotiated
* parameters (extracted from sval, wval and uval).
* See ncr_setsync for alg. details.
*/
idiv = (tp->wval>>4) & 0x07;
if ( *offset && idiv ) {
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)){
if (tp->uval & 0x80)
period = (2*div_10M[idiv-1])/np->clock_khz;
else
period = (4*div_10M[idiv-1])/np->clock_khz;
}
else
period = (((tp->sval>>5)+4)*div_10M[idiv-1])/np->clock_khz;
}
else
period = 0xffff;
if (period <= 125) *factor = 9;
else if (period <= 250) *factor = 10;
else if (period <= 303) *factor = 11;
else if (period <= 500) *factor = 12;
else *factor = (period + 40 - 1) / 40;
}
/*==========================================================
**
** Set actual values, sync status and patch all ccbs of
** a target according to new sync/wide agreement.
**
**==========================================================
*/
static void ncr_set_sync_wide_status (ncb_p np, u_char target)
{
ccb_p cp = np->ccbc;
tcb_p tp = &np->target[target];
/*
** set actual value and sync_status
**
** TEMP register contains current scripts address
** which is data type/direction/dependent.
*/
OUTB (nc_sxfer, tp->sval);
OUTB (nc_scntl3, tp->wval);
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66))
OUTB (nc_scntl4, tp->uval);
/*
** patch ALL ccbs of this target.
*/
for (cp = np->ccbc; cp; cp = cp->link_ccb) {
if (cp->host_status == HS_IDLE)
continue;
if (cp->target != target)
continue;
cp->phys.select.sel_scntl3 = tp->wval;
cp->phys.select.sel_sxfer = tp->sval;
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66))
cp->phys.select.sel_scntl4 = tp->uval;
};
}
/*==========================================================
**
** Switch sync mode for current job and it's target
**
**==========================================================
*/
static void ncr_setsync (ncb_p np, ccb_p cp, u_char scntl3, u_char sxfer,
u_char scntl4)
{
tcb_p tp;
u_char target = INB (nc_sdid) & 0x0f;
u_char idiv;
u_char offset;
assert (cp);
if (!cp) return;
assert (target == (cp->target & 0xf));
tp = &np->target[target];
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)) {
offset = sxfer & 0x3f; /* bits 5-0 */
scntl3 = (scntl3 & 0xf0) | (tp->wval & EWS);
scntl4 = (scntl4 & 0x80);
}
else {
offset = sxfer & 0x1f; /* bits 4-0 */
if (!scntl3 || !offset)
scntl3 = np->rv_scntl3;
scntl3 = (scntl3 & 0xf0) | (tp->wval & EWS) |
(np->rv_scntl3 & 0x07);
}
/*
** Deduce the value of controller sync period from scntl3.
** period is in tenths of nano-seconds.
*/
idiv = ((scntl3 >> 4) & 0x7);
if ( offset && idiv) {
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)) {
/* Note: If extra data hold clocks are used,
* the formulas below must be modified.
* When scntl4 == 0, ST mode.
*/
if (scntl4 & 0x80)
tp->period = (2*div_10M[idiv-1])/np->clock_khz;
else
tp->period = (4*div_10M[idiv-1])/np->clock_khz;
}
else
tp->period = (((sxfer>>5)+4)*div_10M[idiv-1])/np->clock_khz;
}
else
tp->period = 0xffff;
/*
** Stop there if sync parameters are unchanged
*/
if (tp->sval == sxfer && tp->wval == scntl3 && tp->uval == scntl4) return;
tp->sval = sxfer;
tp->wval = scntl3;
tp->uval = scntl4;
/*
** Bells and whistles ;-)
** Donnot announce negotiations due to auto-sense,
** unless user really want us to be verbose. :)
*/
if ( bootverbose < 2 && (cp->host_flags & HF_AUTO_SENSE))
goto next;
PRINT_TARGET(np, target);
if (offset) {
unsigned f10 = 100000 << (tp->widedone ? tp->widedone -1 : 0);
unsigned mb10 = (f10 + tp->period/2) / tp->period;
char *scsi;
/*
** Disable extended Sreq/Sack filtering
*/
if ((tp->period <= 2000) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66))
OUTOFFB (nc_stest2, EXT);
/*
** Bells and whistles ;-)
*/
if (tp->period < 250) scsi = "FAST-80";
else if (tp->period < 500) scsi = "FAST-40";
else if (tp->period < 1000) scsi = "FAST-20";
else if (tp->period < 2000) scsi = "FAST-10";
else scsi = "FAST-5";
printk ("%s %sSCSI %d.%d MB/s (%d.%d ns, offset %d)\n", scsi,
tp->widedone > 1 ? "WIDE " : "",
mb10 / 10, mb10 % 10, tp->period / 10, tp->period % 10,
offset);
} else
printk ("%sasynchronous.\n", tp->widedone > 1 ? "wide " : "");
next:
/*
** set actual value and sync_status
** patch ALL ccbs of this target.
*/
ncr_set_sync_wide_status(np, target);
}
/*==========================================================
**
** Switch wide mode for current job and it's target
** SCSI specs say: a SCSI device that accepts a WDTR
** message shall reset the synchronous agreement to
** asynchronous mode.
**
**==========================================================
*/
static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide, u_char ack)
{
u_short target = INB (nc_sdid) & 0x0f;
tcb_p tp;
u_char scntl3;
u_char sxfer;
assert (cp);
if (!cp) return;
assert (target == (cp->target & 0xf));
tp = &np->target[target];
tp->widedone = wide+1;
scntl3 = (tp->wval & (~EWS)) | (wide ? EWS : 0);
sxfer = ack ? 0 : tp->sval;
/*
** Stop there if sync/wide parameters are unchanged
*/
if (tp->sval == sxfer && tp->wval == scntl3) return;
tp->sval = sxfer;
tp->wval = scntl3;
/*
** Bells and whistles ;-)
*/
if (bootverbose >= 2) {
PRINT_TARGET(np, target);
if (scntl3 & EWS)
printk ("WIDE SCSI (16 bit) enabled.\n");
else
printk ("WIDE SCSI disabled.\n");
}
/*
** set actual value and sync_status
** patch ALL ccbs of this target.
*/
ncr_set_sync_wide_status(np, target);
}
/*==========================================================
**
** Switch sync/wide mode for current job and it's target
** PPR negotiations only
**
**==========================================================
*/
static void ncr_setsyncwide (ncb_p np, ccb_p cp, u_char scntl3, u_char sxfer,
u_char scntl4, u_char wide)
{
tcb_p tp;
u_char target = INB (nc_sdid) & 0x0f;
u_char idiv;
u_char offset;
assert (cp);
if (!cp) return;
assert (target == (cp->target & 0xf));
tp = &np->target[target];
tp->widedone = wide+1;
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)) {
offset = sxfer & 0x3f; /* bits 5-0 */
scntl3 = (scntl3 & 0xf0) | (wide ? EWS : 0);
scntl4 = (scntl4 & 0x80);
}
else {
offset = sxfer & 0x1f; /* bits 4-0 */
if (!scntl3 || !offset)
scntl3 = np->rv_scntl3;
scntl3 = (scntl3 & 0xf0) | (wide ? EWS : 0) |
(np->rv_scntl3 & 0x07);
}
/*
** Deduce the value of controller sync period from scntl3.
** period is in tenths of nano-seconds.
*/
idiv = ((scntl3 >> 4) & 0x7);
if ( offset && idiv) {
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)) {
/* Note: If extra data hold clocks are used,
* the formulas below must be modified.
* When scntl4 == 0, ST mode.
*/
if (scntl4 & 0x80)
tp->period = (2*div_10M[idiv-1])/np->clock_khz;
else
tp->period = (4*div_10M[idiv-1])/np->clock_khz;
}
else
tp->period = (((sxfer>>5)+4)*div_10M[idiv-1])/np->clock_khz;
}
else
tp->period = 0xffff;
/*
** Stop there if sync parameters are unchanged
*/
if (tp->sval == sxfer && tp->wval == scntl3 && tp->uval == scntl4) return;
tp->sval = sxfer;
tp->wval = scntl3;
tp->uval = scntl4;
/*
** Bells and whistles ;-)
** Donnot announce negotiations due to auto-sense,
** unless user really want us to be verbose. :)
*/
if ( bootverbose < 2 && (cp->host_flags & HF_AUTO_SENSE))
goto next;
PRINT_TARGET(np, target);
if (offset) {
unsigned f10 = 100000 << (tp->widedone ? tp->widedone -1 : 0);
unsigned mb10 = (f10 + tp->period/2) / tp->period;
char *scsi;
/*
** Disable extended Sreq/Sack filtering
*/
if ((tp->period <= 2000) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66))
OUTOFFB (nc_stest2, EXT);
/*
** Bells and whistles ;-)
*/
if (tp->period < 250) scsi = "FAST-80";
else if (tp->period < 500) scsi = "FAST-40";
else if (tp->period < 1000) scsi = "FAST-20";
else if (tp->period < 2000) scsi = "FAST-10";
else scsi = "FAST-5";
printk ("%s %sSCSI %d.%d MB/s (%d.%d ns, offset %d)\n", scsi,
tp->widedone > 1 ? "WIDE " : "",
mb10 / 10, mb10 % 10, tp->period / 10, tp->period % 10,
offset);
} else
printk ("%sasynchronous.\n", tp->widedone > 1 ? "wide " : "");
next:
/*
** set actual value and sync_status
** patch ALL ccbs of this target.
*/
ncr_set_sync_wide_status(np, target);
}
/*==========================================================
**
** Switch tagged mode for a target.
**
**==========================================================
*/
static void ncr_setup_tags (ncb_p np, u_char tn, u_char ln)
{
tcb_p tp = &np->target[tn];
lcb_p lp = ncr_lp(np, tp, ln);
u_short reqtags, maxdepth;
/*
** Just in case ...
*/
if ((!tp) || (!lp))
return;
/*
** If SCSI device queue depth is not yet set, leave here.
*/
if (!lp->scdev_depth)
return;
/*
** Donnot allow more tags than the SCSI driver can queue
** for this device.
** Donnot allow more tags than we can handle.
*/
maxdepth = lp->scdev_depth;
if (maxdepth > lp->maxnxs) maxdepth = lp->maxnxs;
if (lp->maxtags > maxdepth) lp->maxtags = maxdepth;
if (lp->numtags > maxdepth) lp->numtags = maxdepth;
/*
** only devices conformant to ANSI Version >= 2
** only devices capable of tagged commands
** only if enabled by user ..
*/
if ((lp->inq_byte7 & INQ7_QUEUE) && lp->numtags > 1) {
reqtags = lp->numtags;
} else {
reqtags = 1;
};
/*
** Update max number of tags
*/
lp->numtags = reqtags;
if (lp->numtags > lp->maxtags)
lp->maxtags = lp->numtags;
/*
** If we want to switch tag mode, we must wait
** for no CCB to be active.
*/
if (reqtags > 1 && lp->usetags) { /* Stay in tagged mode */
if (lp->queuedepth == reqtags) /* Already announced */
return;
lp->queuedepth = reqtags;
}
else if (reqtags <= 1 && !lp->usetags) { /* Stay in untagged mode */
lp->queuedepth = reqtags;
return;
}
else { /* Want to switch tag mode */
if (lp->busyccbs) /* If not yet safe, return */
return;
lp->queuedepth = reqtags;
lp->usetags = reqtags > 1 ? 1 : 0;
}
/*
** Patch the lun mini-script, according to tag mode.
*/
lp->resel_task = lp->usetags?
cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_tag)) :
cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_notag));
/*
** Announce change to user.
*/
if (bootverbose) {
PRINT_LUN(np, tn, ln);
if (lp->usetags)
printk("tagged command queue depth set to %d\n", reqtags);
else
printk("tagged command queueing disabled\n");
}
}
/*----------------------------------------------------
**
** handle user commands
**
**----------------------------------------------------
*/
#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
static void ncr_usercmd (ncb_p np)
{
u_char t;
tcb_p tp;
int ln;
u_long size;
switch (np->user.cmd) {
case 0: return;
case UC_SETDEBUG:
#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
ncr_debug = np->user.data;
#endif
break;
case UC_SETORDER:
np->order = np->user.data;
break;
case UC_SETVERBOSE:
np->verbose = np->user.data;
break;
default:
/*
** We assume that other commands apply to targets.
** This should always be the case and avoid the below
** 4 lines to be repeated 5 times.
*/
for (t = 0; t < MAX_TARGET; t++) {
if (!((np->user.target >> t) & 1))
continue;
tp = &np->target[t];
switch (np->user.cmd) {
case UC_SETSYNC:
tp->usrsync = np->user.data;
ncr_negotiate (np, tp);
break;
case UC_SETWIDE:
size = np->user.data;
if (size > np->maxwide)
size=np->maxwide;
tp->usrwide = size;
ncr_negotiate (np, tp);
break;
case UC_SETTAGS:
tp->usrtags = np->user.data;
for (ln = 0; ln < MAX_LUN; ln++) {
lcb_p lp;
lp = ncr_lp(np, tp, ln);
if (!lp)
continue;
lp->numtags = np->user.data;
lp->maxtags = lp->numtags;
ncr_setup_tags (np, t, ln);
}
break;
case UC_RESETDEV:
tp->to_reset = 1;
np->istat_sem = SEM;
OUTB (nc_istat, SIGP|SEM);
break;
case UC_CLEARDEV:
for (ln = 0; ln < MAX_LUN; ln++) {
lcb_p lp;
lp = ncr_lp(np, tp, ln);
if (lp)
lp->to_clear = 1;
}
np->istat_sem = SEM;
OUTB (nc_istat, SIGP|SEM);
break;
case UC_SETFLAG:
tp->usrflag = np->user.data;
break;
}
}
break;
}
np->user.cmd=0;
}
#endif
/*==========================================================
**
**
** ncr timeout handler.
**
**
**==========================================================
**
** Misused to keep the driver running when
** interrupts are not configured correctly.
**
**----------------------------------------------------------
*/
static void ncr_timeout (ncb_p np)
{
u_long thistime = ktime_get(0);
/*
** If release process in progress, let's go
** Set the release stage from 1 to 2 to synchronize
** with the release process.
*/
if (np->release_stage) {
if (np->release_stage == 1) np->release_stage = 2;
return;
}
#ifdef SCSI_NCR_PCIQ_BROKEN_INTR
np->timer.expires = ktime_get((HZ+9)/10);
#else
np->timer.expires = ktime_get(SCSI_NCR_TIMER_INTERVAL);
#endif
add_timer(&np->timer);
/*
** If we are resetting the ncr, wait for settle_time before
** clearing it. Then command processing will be resumed.
*/
if (np->settle_time) {
if (np->settle_time <= thistime) {
if (bootverbose > 1)
printk("%s: command processing resumed\n", ncr_name(np));
np->settle_time = 0;
requeue_waiting_list(np);
}
return;
}
/*
** Nothing to do for now, but that may come.
*/
if (np->lasttime + 4*HZ < thistime) {
np->lasttime = thistime;
}
#ifdef SCSI_NCR_PCIQ_MAY_MISS_COMPLETIONS
/*
** Some way-broken PCI bridges may lead to
** completions being lost when the clearing
** of the INTFLY flag by the CPU occurs
** concurrently with the chip raising this flag.
** If this ever happen, lost completions will
** be reaped here.
*/
ncr_wakeup_done(np);
#endif
#ifdef SCSI_NCR_PCIQ_BROKEN_INTR
if (INB(nc_istat) & (INTF|SIP|DIP)) {
/*
** Process pending interrupts.
*/
if (DEBUG_FLAGS & DEBUG_TINY) printk ("{");
ncr_exception (np);
if (DEBUG_FLAGS & DEBUG_TINY) printk ("}");
}
#endif /* SCSI_NCR_PCIQ_BROKEN_INTR */
}
/*==========================================================
**
** log message for real hard errors
**
** "ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc)."
** " reg: r0 r1 r2 r3 r4 r5 r6 ..... rf."
**
** exception register:
** ds: dstat
** si: sist
**
** SCSI bus lines:
** so: control lines as driver by NCR.
** si: control lines as seen by NCR.
** sd: scsi data lines as seen by NCR.
**
** wide/fastmode:
** sxfer: (see the manual)
** scntl3: (see the manual)
**
** current script command:
** dsp: script address (relative to start of script).
** dbc: first word of script command.
**
** First 24 register of the chip:
** r0..rf
**
**==========================================================
*/
static void ncr_log_hard_error(ncb_p np, u_short sist, u_char dstat)
{
u_int32 dsp;
int script_ofs;
int script_size;
char *script_name;
u_char *script_base;
int i;
dsp = INL (nc_dsp);
if (dsp > np->p_script && dsp <= np->p_script + sizeof(struct script)) {
script_ofs = dsp - np->p_script;
script_size = sizeof(struct script);
script_base = (u_char *) np->script0;
script_name = "script";
}
else if (np->p_scripth < dsp &&
dsp <= np->p_scripth + sizeof(struct scripth)) {
script_ofs = dsp - np->p_scripth;
script_size = sizeof(struct scripth);
script_base = (u_char *) np->scripth0;
script_name = "scripth";
} else {
script_ofs = dsp;
script_size = 0;
script_base = 0;
script_name = "mem";
}
printk ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n",
ncr_name (np), (unsigned)INB (nc_sdid)&0x0f, dstat, sist,
(unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl), (unsigned)INB (nc_sbdl),
(unsigned)INB (nc_sxfer),(unsigned)INB (nc_scntl3), script_name, script_ofs,
(unsigned)INL (nc_dbc));
if (((script_ofs & 3) == 0) &&
(unsigned)script_ofs < script_size) {
printk ("%s: script cmd = %08x\n", ncr_name(np),
scr_to_cpu((int) *(ncrcmd *)(script_base + script_ofs)));
}
printk ("%s: regdump:", ncr_name(np));
for (i=0; i<24;i++)
printk (" %02x", (unsigned)INB_OFF(i));
printk (".\n");
}
/*============================================================
**
** ncr chip exception handler.
**
**============================================================
**
** In normal situations, interrupt conditions occur one at
** a time. But when something bad happens on the SCSI BUS,
** the chip may raise several interrupt flags before
** stopping and interrupting the CPU. The additionnal
** interrupt flags are stacked in some extra registers
** after the SIP and/or DIP flag has been raised in the
** ISTAT. After the CPU has read the interrupt condition
** flag from SIST or DSTAT, the chip unstacks the other
** interrupt flags and sets the corresponding bits in
** SIST or DSTAT. Since the chip starts stacking once the
** SIP or DIP flag is set, there is a small window of time
** where the stacking does not occur.
**
** Typically, multiple interrupt conditions may happen in
** the following situations:
**
** - SCSI parity error + Phase mismatch (PAR|MA)
** When an parity error is detected in input phase
** and the device switches to msg-in phase inside a
** block MOV.
** - SCSI parity error + Unexpected disconnect (PAR|UDC)
** When a stupid device does not want to handle the
** recovery of an SCSI parity error.
** - Some combinations of STO, PAR, UDC, ...
** When using non compliant SCSI stuff, when user is
** doing non compliant hot tampering on the BUS, when
** something really bad happens to a device, etc ...
**
** The heuristic suggested by SYMBIOS to handle
** multiple interrupts is to try unstacking all
** interrupts conditions and to handle them on some
** priority based on error severity.
** This will work when the unstacking has been
** successful, but we cannot be 100 % sure of that,
** since the CPU may have been faster to unstack than
** the chip is able to stack. Hmmm ... But it seems that
** such a situation is very unlikely to happen.
**
** If this happen, for example STO catched by the CPU
** then UDC happenning before the CPU have restarted
** the SCRIPTS, the driver may wrongly complete the
** same command on UDC, since the SCRIPTS didn't restart
** and the DSA still points to the same command.
** We avoid this situation by setting the DSA to an
** invalid value when the CCB is completed and before
** restarting the SCRIPTS.
**
** Another issue is that we need some section of our
** recovery procedures to be somehow uninterruptible and
** that the SCRIPTS processor does not provides such a
** feature. For this reason, we handle recovery preferently
** from the C code and check against some SCRIPTS
** critical sections from the C code.
**
** Hopefully, the interrupt handling of the driver is now
** able to resist to weird BUS error conditions, but donnot
** ask me for any guarantee that it will never fail. :-)
** Use at your own decision and risk.
**
**============================================================
*/
void ncr_exception (ncb_p np)
{
u_char istat, istatc;
u_char dstat;
u_short sist;
int i;
/*
** interrupt on the fly ?
**
** A `dummy read' is needed to ensure that the
** clear of the INTF flag reaches the device
** before the scanning of the DONE queue.
*/
istat = INB (nc_istat);
if (istat & INTF) {
OUTB (nc_istat, (istat & SIGP) | INTF | np->istat_sem);
istat = INB (nc_istat); /* DUMMY READ */
if (DEBUG_FLAGS & DEBUG_TINY) printk ("F ");
(void)ncr_wakeup_done (np);
};
if (!(istat & (SIP|DIP)))
return;
#if 0 /* We should never get this one */
if (istat & CABRT)
OUTB (nc_istat, CABRT);
#endif
/*
** Steinbach's Guideline for Systems Programming:
** Never test for an error condition you don't know how to handle.
*/
/*========================================================
** PAR and MA interrupts may occur at the same time,
** and we need to know of both in order to handle
** this situation properly. We try to unstack SCSI
** interrupts for that reason. BTW, I dislike a LOT
** such a loop inside the interrupt routine.
** Even if DMA interrupt stacking is very unlikely to
** happen, we also try unstacking these ones, since
** this has no performance impact.
**=========================================================
*/
sist = 0;
dstat = 0;
istatc = istat;
do {
if (istatc & SIP)
sist |= INW (nc_sist);
if (istatc & DIP)
dstat |= INB (nc_dstat);
istatc = INB (nc_istat);
istat |= istatc;
} while (istatc & (SIP|DIP));
if (DEBUG_FLAGS & DEBUG_TINY)
printk ("<%d|%x:%x|%x:%x>",
(int)INB(nc_scr0),
dstat,sist,
(unsigned)INL(nc_dsp),
(unsigned)INL(nc_dbc));
/*
** On paper, a memory barrier may be needed here.
** And since we are paranoid ... :)
*/
MEMORY_BARRIER();
/*========================================================
** First, interrupts we want to service cleanly.
**
** Phase mismatch (MA) is the most frequent interrupt
** for chip earlier than the 896 and so we have to service
** it as quickly as possible.
** A SCSI parity error (PAR) may be combined with a phase
** mismatch condition (MA).
** Programmed interrupts (SIR) are used to call the C code
** from SCRIPTS.
** The single step interrupt (SSI) is not used in this
** driver.
**=========================================================
*/
if (!(sist & (STO|GEN|HTH|SGE|UDC|SBMC|RST)) &&
!(dstat & (MDPE|BF|ABRT|IID))) {
if (sist & PAR) ncr_int_par (np, sist);
else if (sist & MA) ncr_int_ma (np);
else if (dstat & SIR) ncr_int_sir (np);
else if (dstat & SSI) OUTONB_STD ();
else goto unknown_int;
return;
};
/*========================================================
** Now, interrupts that donnot happen in normal
** situations and that we may need to recover from.
**
** On SCSI RESET (RST), we reset everything.
** On SCSI BUS MODE CHANGE (SBMC), we complete all
** active CCBs with RESET status, prepare all devices
** for negotiating again and restart the SCRIPTS.
** On STO and UDC, we complete the CCB with the corres-
** ponding status and restart the SCRIPTS.
**=========================================================
*/
if (sist & RST) {
ncr_init (np, 1, bootverbose ? "scsi reset" : NULL, HS_RESET);
return;
};
OUTB (nc_ctest3, np->rv_ctest3 | CLF); /* clear dma fifo */
OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
if (!(sist & (GEN|HTH|SGE)) &&
!(dstat & (MDPE|BF|ABRT|IID))) {
if (sist & SBMC) ncr_int_sbmc (np);
else if (sist & STO) ncr_int_sto (np);
else if (sist & UDC) ncr_int_udc (np);
else goto unknown_int;
return;
};
/*=========================================================
** Now, interrupts we are not able to recover cleanly.
**
** Do the register dump.
** Log message for hard errors.
** Reset everything.
**=========================================================
*/
if (ktime_exp(np->regtime)) {
np->regtime = ktime_get(10*HZ);
for (i = 0; i<sizeof(np->regdump); i++)
((char*)&np->regdump)[i] = INB_OFF(i);
np->regdump.nc_dstat = dstat;
np->regdump.nc_sist = sist;
};
ncr_log_hard_error(np, sist, dstat);
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)) {
u_char ctest4_o, ctest4_m;
u_char shadow;
/*
* Get shadow register data
* Write 1 to ctest4
*/
ctest4_o = INB(nc_ctest4);
OUTB(nc_ctest4, ctest4_o | 0x10);
ctest4_m = INB(nc_ctest4);
shadow = INW_OFF(0x42);
OUTB(nc_ctest4, ctest4_o);
printk("%s: ctest4/sist original 0x%x/0x%X mod: 0x%X/0x%x\n",
ncr_name(np), ctest4_o, sist, ctest4_m, shadow);
}
if ((sist & (GEN|HTH|SGE)) ||
(dstat & (MDPE|BF|ABRT|IID))) {
ncr_start_reset(np);
return;
};
unknown_int:
/*=========================================================
** We just miss the cause of the interrupt. :(
** Print a message. The timeout will do the real work.
**=========================================================
*/
printk( "%s: unknown interrupt(s) ignored, "
"ISTAT=0x%x DSTAT=0x%x SIST=0x%x\n",
ncr_name(np), istat, dstat, sist);
}
/*==========================================================
**
** generic recovery from scsi interrupt
**
**==========================================================
**
** The doc says that when the chip gets an SCSI interrupt,
** it tries to stop in an orderly fashion, by completing
** an instruction fetch that had started or by flushing
** the DMA fifo for a write to memory that was executing.
** Such a fashion is not enough to know if the instruction
** that was just before the current DSP value has been
** executed or not.
**
** There are 3 small SCRIPTS sections that deal with the
** start queue and the done queue that may break any
** assomption from the C code if we are interrupted
** inside, so we reset if it happens. Btw, since these
** SCRIPTS sections are executed while the SCRIPTS hasn't
** started SCSI operations, it is very unlikely to happen.
**
** All the driver data structures are supposed to be
** allocated from the same 4 GB memory window, so there
** is a 1 to 1 relationship between DSA and driver data
** structures. Since we are careful :) to invalidate the
** DSA when we complete a command or when the SCRIPTS
** pushes a DSA into a queue, we can trust it when it
** points to a CCB.
**
**----------------------------------------------------------
*/
static void ncr_recover_scsi_int (ncb_p np, u_char hsts)
{
u_int32 dsp = INL (nc_dsp);
u_int32 dsa = INL (nc_dsa);
ccb_p cp = ncr_ccb_from_dsa(np, dsa);
/*
** If we haven't been interrupted inside the SCRIPTS
** critical pathes, we can safely restart the SCRIPTS
** and trust the DSA value if it matches a CCB.
*/
if ((!(dsp > NCB_SCRIPT_PHYS (np, getjob_begin) &&
dsp < NCB_SCRIPT_PHYS (np, getjob_end) + 1)) &&
(!(dsp > NCB_SCRIPT_PHYS (np, ungetjob) &&
dsp < NCB_SCRIPT_PHYS (np, reselect) + 1)) &&
(!(dsp > NCB_SCRIPTH_PHYS (np, sel_for_abort) &&
dsp < NCB_SCRIPTH_PHYS (np, sel_for_abort_1) + 1)) &&
(!(dsp > NCB_SCRIPT_PHYS (np, done) &&
dsp < NCB_SCRIPT_PHYS (np, done_end) + 1))) {
if (cp) {
cp->host_status = hsts;
ncr_complete (np, cp);
}
OUTL (nc_dsa, DSA_INVALID);
OUTB (nc_ctest3, np->rv_ctest3 | CLF); /* clear dma fifo */
OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
OUTL_DSP (NCB_SCRIPT_PHYS (np, start));
}
else
goto reset_all;
return;
reset_all:
ncr_start_reset(np);
}
/*==========================================================
**
** ncr chip exception handler for selection timeout
**
**==========================================================
**
** There seems to be a bug in the 53c810.
** Although a STO-Interrupt is pending,
** it continues executing script commands.
** But it will fail and interrupt (IID) on
** the next instruction where it's looking
** for a valid phase.
**
**----------------------------------------------------------
*/
void ncr_int_sto (ncb_p np)
{
u_int32 dsp = INL (nc_dsp);
if (DEBUG_FLAGS & DEBUG_TINY) printk ("T");
if (dsp == NCB_SCRIPT_PHYS (np, wf_sel_done) + 8 ||
!(driver_setup.recovery & 1))
ncr_recover_scsi_int(np, HS_SEL_TIMEOUT);
else
ncr_start_reset(np);
}
/*==========================================================
**
** ncr chip exception handler for unexpected disconnect
**
**==========================================================
**
**----------------------------------------------------------
*/
void ncr_int_udc (ncb_p np)
{
u_int32 dsa = INL (nc_dsa);
ccb_p cp = ncr_ccb_from_dsa(np, dsa);
/*
* Fix Up. Some disks respond to a PPR negotiation with
* a bus free instead of a message reject.
* Disable ppr negotiation if this is first time
* tried ppr negotiation.
*/
if (cp) {
tcb_p tp = &np->target[cp->target];
if (tp->ppr_negotiation == 1)
tp->ppr_negotiation = 0;
}
printk ("%s: unexpected disconnect\n", ncr_name(np));
ncr_recover_scsi_int(np, HS_UNEXPECTED);
}
/*==========================================================
**
** ncr chip exception handler for SCSI bus mode change
**
**==========================================================
**
** spi2-r12 11.2.3 says a transceiver mode change must
** generate a reset event and a device that detects a reset
** event shall initiate a hard reset. It says also that a
** device that detects a mode change shall set data transfer
** mode to eight bit asynchronous, etc...
** So, just resetting should be enough.
**
**
**----------------------------------------------------------
*/
static void ncr_int_sbmc (ncb_p np)
{
u_char scsi_mode = INB (nc_stest4) & SMODE;
printk("%s: SCSI bus mode change from %x to %x.\n",
ncr_name(np), np->scsi_mode, scsi_mode);
np->scsi_mode = scsi_mode;
/*
** Suspend command processing for 1 second and
** reinitialize all except the chip.
*/
np->settle_time = ktime_get(1*HZ);
ncr_init (np, 0, bootverbose ? "scsi mode change" : NULL, HS_RESET);
}
/*==========================================================
**
** ncr chip exception handler for SCSI parity error.
**
**==========================================================
**
** When the chip detects a SCSI parity error and is
** currently executing a (CH)MOV instruction, it does
** not interrupt immediately, but tries to finish the
** transfer of the current scatter entry before
** interrupting. The following situations may occur:
**
** - The complete scatter entry has been transferred
** without the device having changed phase.
** The chip will then interrupt with the DSP pointing
** to the instruction that follows the MOV.
**
** - A phase mismatch occurs before the MOV finished
** and phase errors are to be handled by the C code.
** The chip will then interrupt with both PAR and MA
** conditions set.
**
** - A phase mismatch occurs before the MOV finished and
** phase errors are to be handled by SCRIPTS (895A or 896).
** The chip will load the DSP with the phase mismatch
** JUMP address and interrupt the host processor.
**
**----------------------------------------------------------
*/
static void ncr_int_par (ncb_p np, u_short sist)
{
u_char hsts = INB (HS_PRT);
u_int32 dsp = INL (nc_dsp);
u_int32 dbc = INL (nc_dbc);
u_int32 dsa = INL (nc_dsa);
u_char sbcl = INB (nc_sbcl);
u_char cmd = dbc >> 24;
int phase = cmd & 7;
ccb_p cp = ncr_ccb_from_dsa(np, dsa);
printk("%s: SCSI parity error detected: SCR1=%d DBC=%x SBCL=%x\n",
ncr_name(np), hsts, dbc, sbcl);
/*
** Check that the chip is connected to the SCSI BUS.
*/
if (!(INB (nc_scntl1) & ISCON)) {
if (!(driver_setup.recovery & 1)) {
ncr_recover_scsi_int(np, HS_FAIL);
return;
}
goto reset_all;
}
/*
** If the nexus is not clearly identified, reset the bus.
** We will try to do better later.
*/
if (!cp)
goto reset_all;
/*
** Check instruction was a MOV, direction was INPUT and
** ATN is asserted.
*/
if ((cmd & 0xc0) || !(phase & 1) || !(sbcl & 0x8))
goto reset_all;
/*
** Keep track of the parity error.
*/
OUTONB (HF_PRT, HF_EXT_ERR);
cp->xerr_status |= XE_PARITY_ERR;
/*
** Prepare the message to send to the device.
*/
np->msgout[0] = (phase == 7) ? M_PARITY : M_ID_ERROR;
#ifdef SCSI_NCR_INTEGRITY_CHECKING
/*
** Save error message. For integrity check use only.
*/
if (np->check_integrity)
np->check_integ_par = np->msgout[0];
#endif
/*
** If the old phase was DATA IN or DT DATA IN phase,
** we have to deal with the 3 situations described above.
** For other input phases (MSG IN and STATUS), the device
** must resend the whole thing that failed parity checking
** or signal error. So, jumping to dispatcher should be OK.
*/
if ((phase == 1) || (phase == 5)) {
/* Phase mismatch handled by SCRIPTS */
if (dsp == NCB_SCRIPTH_PHYS (np, pm_handle))
OUTL_DSP (dsp);
/* Phase mismatch handled by the C code */
else if (sist & MA)
ncr_int_ma (np);
/* No phase mismatch occurred */
else {
OUTL (nc_temp, dsp);
OUTL_DSP (NCB_SCRIPT_PHYS (np, dispatch));
}
}
else
OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
return;
reset_all:
ncr_start_reset(np);
return;
}
/*==========================================================
**
**
** ncr chip exception handler for phase errors.
**
**
**==========================================================
**
** We have to construct a new transfer descriptor,
** to transfer the rest of the current block.
**
**----------------------------------------------------------
*/
static void ncr_int_ma (ncb_p np)
{
u_int32 dbc;
u_int32 rest;
u_int32 dsp;
u_int32 dsa;
u_int32 nxtdsp;
u_int32 *vdsp;
u_int32 oadr, olen;
u_int32 *tblp;
u_int32 newcmd;
u_int delta;
u_char cmd;
u_char hflags, hflags0;
struct pm_ctx *pm;
ccb_p cp;
dsp = INL (nc_dsp);
dbc = INL (nc_dbc);
dsa = INL (nc_dsa);
cmd = dbc >> 24;
rest = dbc & 0xffffff;
delta = 0;
/*
** locate matching cp.
*/
cp = ncr_ccb_from_dsa(np, dsa);
if (DEBUG_FLAGS & DEBUG_PHASE)
printk("CCB = %2x %2x %2x %2x %2x %2x\n",
cp->cmd->cmnd[0], cp->cmd->cmnd[1], cp->cmd->cmnd[2],
cp->cmd->cmnd[3], cp->cmd->cmnd[4], cp->cmd->cmnd[5]);
/*
** Donnot take into account dma fifo and various buffers in
** INPUT phase since the chip flushes everything before
** raising the MA interrupt for interrupted INPUT phases.
** For DATA IN phase, we will check for the SWIDE later.
*/
if ((cmd & 7) != 1 && (cmd & 7) != 5) {
u_int32 dfifo;
u_char ss0, ss2;
/*
** If C1010, DFBC contains number of bytes in DMA fifo.
** else read DFIFO, CTEST[4-6] using 1 PCI bus ownership.
*/
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66))
delta = INL(nc_dfbc) & 0xffff;
else {
dfifo = INL(nc_dfifo);
/*
** Calculate remaining bytes in DMA fifo.
** C1010 - always large fifo, value in dfbc
** Otherwise, (CTEST5 = dfifo >> 16)
*/
if (dfifo & (DFS << 16))
delta = ((((dfifo >> 8) & 0x300) |
(dfifo & 0xff)) - rest) & 0x3ff;
else
delta = ((dfifo & 0xff) - rest) & 0x7f;
/*
** The data in the dma fifo has not been
** transferred to the target -> add the amount
** to the rest and clear the data.
** Check the sstat2 register in case of wide
** transfer.
*/
}
rest += delta;
ss0 = INB (nc_sstat0);
if (ss0 & OLF) rest++;
if ((np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66) && (ss0 & ORF))
rest++;
if (cp && (cp->phys.select.sel_scntl3 & EWS)) {
ss2 = INB (nc_sstat2);
if (ss2 & OLF1) rest++;
if ((np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66) && (ss2 & ORF))
rest++;
};
/*
** Clear fifos.
*/
OUTB (nc_ctest3, np->rv_ctest3 | CLF); /* dma fifo */
OUTB (nc_stest3, TE|CSF); /* scsi fifo */
}
/*
** log the information
*/
if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
printk ("P%x%x RL=%d D=%d ", cmd&7, INB(nc_sbcl)&7,
(unsigned) rest, (unsigned) delta);
/*
** try to find the interrupted script command,
** and the address at which to continue.
*/
vdsp = 0;
nxtdsp = 0;
if (dsp > np->p_script &&
dsp <= np->p_script + sizeof(struct script)) {
vdsp = (u_int32 *)((char*)np->script0 + (dsp-np->p_script-8));
nxtdsp = dsp;
}
else if (dsp > np->p_scripth &&
dsp <= np->p_scripth + sizeof(struct scripth)) {
vdsp = (u_int32 *)((char*)np->scripth0 + (dsp-np->p_scripth-8));
nxtdsp = dsp;
}
/*
** log the information
*/
if (DEBUG_FLAGS & DEBUG_PHASE) {
printk ("\nCP=%p DSP=%x NXT=%x VDSP=%p CMD=%x ",
cp, (unsigned)dsp, (unsigned)nxtdsp, vdsp, cmd);
};
if (!vdsp) {
printk ("%s: interrupted SCRIPT address not found.\n",
ncr_name (np));
goto reset_all;
}
if (!cp) {
printk ("%s: SCSI phase error fixup: CCB already dequeued.\n",
ncr_name (np));
goto reset_all;
}
/*
** get old startaddress and old length.
*/
oadr = scr_to_cpu(vdsp[1]);
if (cmd & 0x10) { /* Table indirect */
tblp = (u_int32 *) ((char*) &cp->phys + oadr);
olen = scr_to_cpu(tblp[0]);
oadr = scr_to_cpu(tblp[1]);
} else {
tblp = (u_int32 *) 0;
olen = scr_to_cpu(vdsp[0]) & 0xffffff;
};
if (DEBUG_FLAGS & DEBUG_PHASE) {
printk ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n",
(unsigned) (scr_to_cpu(vdsp[0]) >> 24),
tblp,
(unsigned) olen,
(unsigned) oadr);
};
/*
** check cmd against assumed interrupted script command.
** If dt data phase, the MOVE instruction hasn't bit 4 of
** the phase.
*/
if (((cmd & 2) ? cmd : (cmd & ~4)) != (scr_to_cpu(vdsp[0]) >> 24)) {
PRINT_ADDR(cp->cmd);
printk ("internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n",
(unsigned)cmd, (unsigned)scr_to_cpu(vdsp[0]) >> 24);
goto reset_all;
};
/*
** if old phase not dataphase, leave here.
** C/D line is low if data.
*/
if (cmd & 0x02) {
PRINT_ADDR(cp->cmd);
printk ("phase change %x-%x %d@%08x resid=%d.\n",
cmd&7, INB(nc_sbcl)&7, (unsigned)olen,
(unsigned)oadr, (unsigned)rest);
goto unexpected_phase;
};
/*
** Choose the correct PM save area.
**
** Look at the PM_SAVE SCRIPT if you want to understand
** this stuff. The equivalent code is implemented in
** SCRIPTS for the 895A and 896 that are able to handle
** PM from the SCRIPTS processor.
*/
hflags0 = INB (HF_PRT);
hflags = hflags0;
if (hflags & (HF_IN_PM0 | HF_IN_PM1 | HF_DP_SAVED)) {
if (hflags & HF_IN_PM0)
nxtdsp = scr_to_cpu(cp->phys.pm0.ret);
else if (hflags & HF_IN_PM1)
nxtdsp = scr_to_cpu(cp->phys.pm1.ret);
if (hflags & HF_DP_SAVED)
hflags ^= HF_ACT_PM;
}
if (!(hflags & HF_ACT_PM)) {
pm = &cp->phys.pm0;
newcmd = NCB_SCRIPT_PHYS(np, pm0_data);
}
else {
pm = &cp->phys.pm1;
newcmd = NCB_SCRIPT_PHYS(np, pm1_data);
}
hflags &= ~(HF_IN_PM0 | HF_IN_PM1 | HF_DP_SAVED);
if (hflags != hflags0)
OUTB (HF_PRT, hflags);
/*
** fillin the phase mismatch context
*/
pm->sg.addr = cpu_to_scr(oadr + olen - rest);
pm->sg.size = cpu_to_scr(rest);
pm->ret = cpu_to_scr(nxtdsp);
/*
** If we have a SWIDE,
** - prepare the address to write the SWIDE from SCRIPTS,
** - compute the SCRIPTS address to restart from,
** - move current data pointer context by one byte.
*/
nxtdsp = NCB_SCRIPT_PHYS (np, dispatch);
if ( ((cmd & 7) == 1 || (cmd & 7) == 5)
&& cp && (cp->phys.select.sel_scntl3 & EWS) &&
(INB (nc_scntl2) & WSR)) {
u32 tmp;
#ifdef SYM_DEBUG_PM_WITH_WSR
PRINT_ADDR(cp);
printk ("MA interrupt with WSR set - "
"pm->sg.addr=%x - pm->sg.size=%d\n",
pm->sg.addr, pm->sg.size);
#endif
/*
* Set up the table indirect for the MOVE
* of the residual byte and adjust the data
* pointer context.
*/
tmp = scr_to_cpu(pm->sg.addr);
cp->phys.wresid.addr = cpu_to_scr(tmp);
pm->sg.addr = cpu_to_scr(tmp + 1);
tmp = scr_to_cpu(pm->sg.size);
cp->phys.wresid.size = cpu_to_scr((tmp&0xff000000) | 1);
pm->sg.size = cpu_to_scr(tmp - 1);
/*
* If only the residual byte is to be moved,
* no PM context is needed.
*/
if ((tmp&0xffffff) == 1)
newcmd = pm->ret;
/*
* Prepare the address of SCRIPTS that will
* move the residual byte to memory.
*/
nxtdsp = NCB_SCRIPTH_PHYS (np, wsr_ma_helper);
}
if (DEBUG_FLAGS & DEBUG_PHASE) {
PRINT_ADDR(cp->cmd);
printk ("PM %x %x %x / %x %x %x.\n",
hflags0, hflags, newcmd,
(unsigned)scr_to_cpu(pm->sg.addr),
(unsigned)scr_to_cpu(pm->sg.size),
(unsigned)scr_to_cpu(pm->ret));
}
/*
** Restart the SCRIPTS processor.
*/
OUTL (nc_temp, newcmd);
OUTL_DSP (nxtdsp);
return;
/*
** Unexpected phase changes that occurs when the current phase
** is not a DATA IN or DATA OUT phase are due to error conditions.
** Such event may only happen when the SCRIPTS is using a
** multibyte SCSI MOVE.
**
** Phase change Some possible cause
**
** COMMAND --> MSG IN SCSI parity error detected by target.
** COMMAND --> STATUS Bad command or refused by target.
** MSG OUT --> MSG IN Message rejected by target.
** MSG OUT --> COMMAND Bogus target that discards extended
** negotiation messages.
**
** The code below does not care of the new phase and so
** trusts the target. Why to annoy it ?
** If the interrupted phase is COMMAND phase, we restart at
** dispatcher.
** If a target does not get all the messages after selection,
** the code assumes blindly that the target discards extended
** messages and clears the negotiation status.
** If the target does not want all our response to negotiation,
** we force a SIR_NEGO_PROTO interrupt (it is a hack that avoids
** bloat for such a should_not_happen situation).
** In all other situation, we reset the BUS.
** Are these assumptions reasonnable ? (Wait and see ...)
*/
unexpected_phase:
dsp -= 8;
nxtdsp = 0;
switch (cmd & 7) {
case 2: /* COMMAND phase */
nxtdsp = NCB_SCRIPT_PHYS (np, dispatch);
break;
#if 0
case 3: /* STATUS phase */
nxtdsp = NCB_SCRIPT_PHYS (np, dispatch);
break;
#endif
case 6: /* MSG OUT phase */
/*
** If the device may want to use untagged when we want
** tagged, we prepare an IDENTIFY without disc. granted,
** since we will not be able to handle reselect.
** Otherwise, we just don't care.
*/
if (dsp == NCB_SCRIPT_PHYS (np, send_ident)) {
if (cp->tag != NO_TAG && olen - rest <= 3) {
cp->host_status = HS_BUSY;
np->msgout[0] = M_IDENTIFY | cp->lun;
nxtdsp = NCB_SCRIPTH_PHYS (np, ident_break_atn);
}
else
nxtdsp = NCB_SCRIPTH_PHYS (np, ident_break);
}
else if (dsp == NCB_SCRIPTH_PHYS (np, send_wdtr) ||
dsp == NCB_SCRIPTH_PHYS (np, send_sdtr) ||
dsp == NCB_SCRIPTH_PHYS (np, send_ppr)) {
nxtdsp = NCB_SCRIPTH_PHYS (np, nego_bad_phase);
}
break;
#if 0
case 7: /* MSG IN phase */
nxtdsp = NCB_SCRIPT_PHYS (np, clrack);
break;
#endif
}
if (nxtdsp) {
OUTL_DSP (nxtdsp);
return;
}
reset_all:
ncr_start_reset(np);
}
/*==========================================================
**
** ncr chip handler for QUEUE FULL and CHECK CONDITION
**
**==========================================================
**
** On QUEUE FULL status, we set the actual tagged command
** queue depth to the number of disconnected CCBs that is
** hopefully a good value to avoid further QUEUE FULL.
**
** On CHECK CONDITION or COMMAND TERMINATED, we use the
** CCB of the failed command for performing a REQUEST
** SENSE SCSI command.
**
** We do not want to change the order commands will be
** actually queued to the device after we received a
** QUEUE FULL status. We also want to properly deal with
** contingent allegiance condition. For these reasons,
** we remove from the start queue all commands for this
** LUN that haven't been yet queued to the device and
** put them back in the correponding LUN queue, then
** requeue the CCB that failed in front of the LUN queue.
** I just hope this not to be performed too often. :)
**
** If we are using IMMEDIATE ARBITRATION, we clear the
** IARB hint for every commands we encounter in order not
** to be stuck with a won arbitration and no job to queue
** to a device.
**----------------------------------------------------------
*/
static void ncr_sir_to_redo(ncb_p np, int num, ccb_p cp)
{
Scsi_Cmnd *cmd = cp->cmd;
tcb_p tp = &np->target[cp->target];
lcb_p lp = ncr_lp(np, tp, cp->lun);
ccb_p cp2;
int busyccbs = 1;
u_int32 startp;
u_char s_status = INB (SS_PRT);
int msglen;
int i, j;
/*
** If the LCB is not yet available, then only
** 1 IO is accepted, so we should have it.
*/
if (!lp)
goto next;
/*
** Remove all CCBs queued to the chip for that LUN and put
** them back in the LUN CCB wait queue.
*/
busyccbs = lp->queuedccbs;
i = (INL (nc_scratcha) - np->p_squeue) / 4;
j = i;
while (i != np->squeueput) {
cp2 = ncr_ccb_from_dsa(np, scr_to_cpu(np->squeue[i]));
assert(cp2);
#ifdef SCSI_NCR_IARB_SUPPORT
/* IARB hints may not be relevant any more. Forget them. */
cp2->host_flags &= ~HF_HINT_IARB;
#endif
if (cp2 && cp2->target == cp->target && cp2->lun == cp->lun) {
xpt_remque(&cp2->link_ccbq);
xpt_insque_head(&cp2->link_ccbq, &lp->wait_ccbq);
--lp->queuedccbs;
cp2->queued = 0;
}
else {
if (i != j)
np->squeue[j] = np->squeue[i];
if ((j += 2) >= MAX_START*2) j = 0;
}
if ((i += 2) >= MAX_START*2) i = 0;
}
if (i != j) /* Copy back the idle task if needed */
np->squeue[j] = np->squeue[i];
np->squeueput = j; /* Update our current start queue pointer */
/*
** Requeue the interrupted CCB in front of the
** LUN CCB wait queue to preserve ordering.
*/
xpt_remque(&cp->link_ccbq);
xpt_insque_head(&cp->link_ccbq, &lp->wait_ccbq);
--lp->queuedccbs;
cp->queued = 0;
next:
#ifdef SCSI_NCR_IARB_SUPPORT
/* IARB hint may not be relevant any more. Forget it. */
cp->host_flags &= ~HF_HINT_IARB;
if (np->last_cp)
np->last_cp = 0;
#endif
/*
** Now we can restart the SCRIPTS processor safely.
*/
OUTL_DSP (NCB_SCRIPT_PHYS (np, start));
switch(s_status) {
default:
case S_BUSY:
ncr_complete(np, cp);
break;
case S_QUEUE_FULL:
if (!lp || !lp->queuedccbs) {
ncr_complete(np, cp);
break;
}
if (bootverbose >= 1) {
PRINT_ADDR(cmd);
printk ("QUEUE FULL! %d busy, %d disconnected CCBs\n",
busyccbs, lp->queuedccbs);
}
/*
** Decrease number of tags to the number of
** disconnected commands.
*/
if (lp->queuedccbs < lp->numtags) {
lp->numtags = lp->queuedccbs;
lp->num_good = 0;
ncr_setup_tags (np, cp->target, cp->lun);
}
/*
** Repair the offending CCB.
*/
cp->phys.header.savep = cp->startp;
cp->phys.header.lastp = cp->lastp0;
cp->host_status = HS_BUSY;
cp->scsi_status = S_ILLEGAL;
cp->xerr_status = 0;
cp->extra_bytes = 0;
cp->host_flags &= (HF_PM_TO_C|HF_DATA_IN);
break;
case S_TERMINATED:
case S_CHECK_COND:
/*
** If we were requesting sense, give up.
*/
if (cp->host_flags & HF_AUTO_SENSE) {
ncr_complete(np, cp);
break;
}
/*
** Save SCSI status and extended error.
** Compute the data residual now.
*/
cp->sv_scsi_status = cp->scsi_status;
cp->sv_xerr_status = cp->xerr_status;
cp->resid = ncr_compute_residual(np, cp);
/*
** Device returned CHECK CONDITION status.
** Prepare all needed data strutures for getting
** sense data.
*/
/*
** identify message
*/
cp->scsi_smsg2[0] = M_IDENTIFY | cp->lun;
msglen = 1;
/*
** If we are currently using anything different from
** async. 8 bit data transfers with that target,
** start a negotiation, since the device may want
** to report us a UNIT ATTENTION condition due to
** a cause we currently ignore, and we donnot want
** to be stuck with WIDE and/or SYNC data transfer.
**
** cp->nego_status is filled by ncr_prepare_nego().
**
** Do NOT negotiate if performing integrity check
** or if integrity check has completed, all check
** conditions will have been cleared.
*/
#ifdef SCSI_NCR_INTEGRITY_CHECKING
if (DEBUG_FLAGS & DEBUG_IC) {
printk("%s: ncr_sir_to_redo: ic_done %2X, in_progress %2X\n",
ncr_name(np), tp->ic_done, cp->cmd->ic_in_progress);
}
/*
** If parity error during integrity check,
** set the target width to narrow. Otherwise,
** do not negotiate on a request sense.
*/
if ( np->check_integ_par && np->check_integrity
&& cp->cmd->ic_in_progress ) {
cp->nego_status = 0;
msglen +=
ncr_ic_nego (np, cp, cmd ,&cp->scsi_smsg2[msglen]);
}
if (!np->check_integrity ||
(np->check_integrity &&
(!cp->cmd->ic_in_progress && !tp->ic_done)) ) {
ncr_negotiate(np, tp);
cp->nego_status = 0;
{
u_char sync_offset;
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66))
sync_offset = tp->sval & 0x3f;
else
sync_offset = tp->sval & 0x1f;
if ((tp->wval & EWS) || sync_offset)
msglen +=
ncr_prepare_nego (np, cp, &cp->scsi_smsg2[msglen]);
}
}
#else
ncr_negotiate(np, tp);
cp->nego_status = 0;
if ((tp->wval & EWS) || (tp->sval & 0x1f))
msglen +=
ncr_prepare_nego (np, cp, &cp->scsi_smsg2[msglen]);
#endif /* SCSI_NCR_INTEGRITY_CHECKING */
/*
** Message table indirect structure.
*/
cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg2));
cp->phys.smsg.size = cpu_to_scr(msglen);
/*
** sense command
*/
cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, sensecmd));
cp->phys.cmd.size = cpu_to_scr(6);
/*
** patch requested size into sense command
*/
cp->sensecmd[0] = 0x03;
cp->sensecmd[1] = cp->lun << 5;
cp->sensecmd[4] = sizeof(cp->sense_buf);
/*
** sense data
*/
bzero(cp->sense_buf, sizeof(cp->sense_buf));
cp->phys.sense.addr = cpu_to_scr(CCB_PHYS(cp,sense_buf[0]));
cp->phys.sense.size = cpu_to_scr(sizeof(cp->sense_buf));
/*
** requeue the command.
*/
startp = NCB_SCRIPTH_PHYS (np, sdata_in);
cp->phys.header.savep = cpu_to_scr(startp);
cp->phys.header.goalp = cpu_to_scr(startp + 16);
cp->phys.header.lastp = cpu_to_scr(startp);
cp->phys.header.wgoalp = cpu_to_scr(startp + 16);
cp->phys.header.wlastp = cpu_to_scr(startp);
cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
cp->scsi_status = S_ILLEGAL;
cp->host_flags = (HF_AUTO_SENSE|HF_DATA_IN);
cp->phys.header.go.start =
cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
/*
** If lp not yet allocated, requeue the command.
*/
if (!lp)
ncr_put_start_queue(np, cp);
break;
}
/*
** requeue awaiting scsi commands for this lun.
*/
if (lp)
ncr_start_next_ccb(np, lp, 1);
return;
}
/*----------------------------------------------------------
**
** After a device has accepted some management message
** as BUS DEVICE RESET, ABORT TASK, etc ..., or when
** a device signals a UNIT ATTENTION condition, some
** tasks are thrown away by the device. We are required
** to reflect that on our tasks list since the device
** will never complete these tasks.
**
** This function completes all disconnected CCBs for a
** given target that matches the following criteria:
** - lun=-1 means any logical UNIT otherwise a given one.
** - task=-1 means any task, otherwise a given one.
**----------------------------------------------------------
*/
static int ncr_clear_tasks(ncb_p np, u_char hsts,
int target, int lun, int task)
{
int i = 0;
ccb_p cp;
for (cp = np->ccbc; cp; cp = cp->link_ccb) {
if (cp->host_status != HS_DISCONNECT)
continue;
if (cp->target != target)
continue;
if (lun != -1 && cp->lun != lun)
continue;
if (task != -1 && cp->tag != NO_TAG && cp->scsi_smsg[2] != task)
continue;
cp->host_status = hsts;
cp->scsi_status = S_ILLEGAL;
ncr_complete(np, cp);
++i;
}
return i;
}
/*==========================================================
**
** ncr chip handler for TASKS recovery.
**
**==========================================================
**
** We cannot safely abort a command, while the SCRIPTS
** processor is running, since we just would be in race
** with it.
**
** As long as we have tasks to abort, we keep the SEM
** bit set in the ISTAT. When this bit is set, the
** SCRIPTS processor interrupts (SIR_SCRIPT_STOPPED)
** each time it enters the scheduler.
**
** If we have to reset a target, clear tasks of a unit,
** or to perform the abort of a disconnected job, we
** restart the SCRIPTS for selecting the target. Once
** selected, the SCRIPTS interrupts (SIR_TARGET_SELECTED).
** If it loses arbitration, the SCRIPTS will interrupt again
** the next time it will enter its scheduler, and so on ...
**
** On SIR_TARGET_SELECTED, we scan for the more
** appropriate thing to do:
**
** - If nothing, we just sent a M_ABORT message to the
** target to get rid of the useless SCSI bus ownership.
** According to the specs, no tasks shall be affected.
** - If the target is to be reset, we send it a M_RESET
** message.
** - If a logical UNIT is to be cleared , we send the
** IDENTIFY(lun) + M_ABORT.
** - If an untagged task is to be aborted, we send the
** IDENTIFY(lun) + M_ABORT.
** - If a tagged task is to be aborted, we send the
** IDENTIFY(lun) + task attributes + M_ABORT_TAG.
**
** Once our 'kiss of death' :) message has been accepted
** by the target, the SCRIPTS interrupts again
** (SIR_ABORT_SENT). On this interrupt, we complete
** all the CCBs that should have been aborted by the
** target according to our message.
**
**----------------------------------------------------------
*/
static void ncr_sir_task_recovery(ncb_p np, int num)
{
ccb_p cp;
tcb_p tp;
int target=-1, lun=-1, task;
int i, k;
u_char *p;
switch(num) {
/*
** The SCRIPTS processor stopped before starting
** the next command in order to allow us to perform
** some task recovery.
*/
case SIR_SCRIPT_STOPPED:
/*
** Do we have any target to reset or unit to clear ?
*/
for (i = 0 ; i < MAX_TARGET ; i++) {
tp = &np->target[i];
if (tp->to_reset || (tp->l0p && tp->l0p->to_clear)) {
target = i;
break;
}
if (!tp->lmp)
continue;
for (k = 1 ; k < MAX_LUN ; k++) {
if (tp->lmp[k] && tp->lmp[k]->to_clear) {
target = i;
break;
}
}
if (target != -1)
break;
}
/*
** If not, look at the CCB list for any
** disconnected CCB to be aborted.
*/
if (target == -1) {
for (cp = np->ccbc; cp; cp = cp->link_ccb) {
if (cp->host_status != HS_DISCONNECT)
continue;
if (cp->to_abort) {
target = cp->target;
break;
}
}
}
/*
** If some target is to be selected,
** prepare and start the selection.
*/
if (target != -1) {
tp = &np->target[target];
np->abrt_sel.sel_id = target;
np->abrt_sel.sel_scntl3 = tp->wval;
np->abrt_sel.sel_sxfer = tp->sval;
np->abrt_sel.sel_scntl4 = tp->uval;
OUTL(nc_dsa, np->p_ncb);
OUTL_DSP (NCB_SCRIPTH_PHYS (np, sel_for_abort));
return;
}
/*
** Nothing is to be selected, so we donnot need
** to synchronize with the SCRIPTS anymore.
** Remove the SEM flag from the ISTAT.
*/
np->istat_sem = 0;
OUTB (nc_istat, SIGP);
/*
** Now look at CCBs to abort that haven't started yet.
** Remove all those CCBs from the start queue and
** complete them with appropriate status.
** Btw, the SCRIPTS processor is still stopped, so
** we are not in race.
*/
for (cp = np->ccbc; cp; cp = cp->link_ccb) {
if (cp->host_status != HS_BUSY &&
cp->host_status != HS_NEGOTIATE)
continue;
if (!cp->to_abort)
continue;
#ifdef SCSI_NCR_IARB_SUPPORT
/*
** If we are using IMMEDIATE ARBITRATION, we donnot
** want to cancel the last queued CCB, since the
** SCRIPTS may have anticipated the selection.
*/
if (cp == np->last_cp) {
cp->to_abort = 0;
continue;
}
#endif
/*
** Compute index of next position in the start
** queue the SCRIPTS will schedule.
*/
i = (INL (nc_scratcha) - np->p_squeue) / 4;
/*
** Remove the job from the start queue.
*/
k = -1;
while (1) {
if (i == np->squeueput)
break;
if (k == -1) { /* Not found yet */
if (cp == ncr_ccb_from_dsa(np,
scr_to_cpu(np->squeue[i])))
k = i; /* Found */
}
else {
/*
** Once found, we have to move
** back all jobs by 1 position.
*/
np->squeue[k] = np->squeue[i];
k += 2;
if (k >= MAX_START*2)
k = 0;
}
i += 2;
if (i >= MAX_START*2)
i = 0;
}
/*
** If job removed, repair the start queue.
*/
if (k != -1) {
np->squeue[k] = np->squeue[i]; /* Idle task */
np->squeueput = k; /* Start queue pointer */
}
cp->host_status = HS_ABORTED;
cp->scsi_status = S_ILLEGAL;
ncr_complete(np, cp);
}
break;
/*
** The SCRIPTS processor has selected a target
** we may have some manual recovery to perform for.
*/
case SIR_TARGET_SELECTED:
target = (INB (nc_sdid) & 0xf);
tp = &np->target[target];
np->abrt_tbl.addr = cpu_to_scr(vtobus(np->abrt_msg));
/*
** If the target is to be reset, prepare a
** M_RESET message and clear the to_reset flag
** since we donnot expect this operation to fail.
*/
if (tp->to_reset) {
np->abrt_msg[0] = M_RESET;
np->abrt_tbl.size = 1;
tp->to_reset = 0;
break;
}
/*
** Otherwise, look for some logical unit to be cleared.
*/
if (tp->l0p && tp->l0p->to_clear)
lun = 0;
else if (tp->lmp) {
for (k = 1 ; k < MAX_LUN ; k++) {
if (tp->lmp[k] && tp->lmp[k]->to_clear) {
lun = k;
break;
}
}
}
/*
** If a logical unit is to be cleared, prepare
** an IDENTIFY(lun) + ABORT MESSAGE.
*/
if (lun != -1) {
lcb_p lp = ncr_lp(np, tp, lun);
lp->to_clear = 0; /* We donnot expect to fail here */
np->abrt_msg[0] = M_IDENTIFY | lun;
np->abrt_msg[1] = M_ABORT;
np->abrt_tbl.size = 2;
break;
}
/*
** Otherwise, look for some disconnected job to
** abort for this target.
*/
for (cp = np->ccbc; cp; cp = cp->link_ccb) {
if (cp->host_status != HS_DISCONNECT)
continue;
if (cp->target != target)
continue;
if (cp->to_abort)
break;
}
/*
** If we have none, probably since the device has
** completed the command before we won abitration,
** send a M_ABORT message without IDENTIFY.
** According to the specs, the device must just
** disconnect the BUS and not abort any task.
*/
if (!cp) {
np->abrt_msg[0] = M_ABORT;
np->abrt_tbl.size = 1;
break;
}
/*
** We have some task to abort.
** Set the IDENTIFY(lun)
*/
np->abrt_msg[0] = M_IDENTIFY | cp->lun;
/*
** If we want to abort an untagged command, we
** will send a IDENTIFY + M_ABORT.
** Otherwise (tagged command), we will send
** a IDENTITFY + task attributes + ABORT TAG.
*/
if (cp->tag == NO_TAG) {
np->abrt_msg[1] = M_ABORT;
np->abrt_tbl.size = 2;
}
else {
np->abrt_msg[1] = cp->scsi_smsg[1];
np->abrt_msg[2] = cp->scsi_smsg[2];
np->abrt_msg[3] = M_ABORT_TAG;
np->abrt_tbl.size = 4;
}
cp->to_abort = 0; /* We donnot expect to fail here */
break;
/*
** The target has accepted our message and switched
** to BUS FREE phase as we expected.
*/
case SIR_ABORT_SENT:
target = (INB (nc_sdid) & 0xf);
tp = &np->target[target];
/*
** If we didn't abort anything, leave here.
*/
if (np->abrt_msg[0] == M_ABORT)
break;
/*
** If we sent a M_RESET, then a hardware reset has
** been performed by the target.
** - Reset everything to async 8 bit
** - Tell ourself to negotiate next time :-)
** - Prepare to clear all disconnected CCBs for
** this target from our task list (lun=task=-1)
*/
lun = -1;
task = -1;
if (np->abrt_msg[0] == M_RESET) {
tp->sval = 0;
tp->wval = np->rv_scntl3;
tp->uval = np->rv_scntl4;
ncr_set_sync_wide_status(np, target);
ncr_negotiate(np, tp);
}
/*
** Otherwise, check for the LUN and TASK(s)
** concerned by the cancelation.
** If it is not ABORT_TAG then it is CLEAR_QUEUE
** or an ABORT message :-)
*/
else {
lun = np->abrt_msg[0] & 0x3f;
if (np->abrt_msg[1] == M_ABORT_TAG)
task = np->abrt_msg[2];
}
/*
** Complete all the CCBs the device should have
** aborted due to our 'kiss of death' message.
*/
(void) ncr_clear_tasks(np, HS_ABORTED, target, lun, task);
break;
/*
** We have performed a auto-sense that succeeded.
** If the device reports a UNIT ATTENTION condition
** due to a RESET condition, we must complete all
** disconnect CCBs for this unit since the device
** shall have thrown them away.
** Since I haven't time to guess what the specs are
** expecting for other UNIT ATTENTION conditions, I
** decided to only care about RESET conditions. :)
*/
case SIR_AUTO_SENSE_DONE:
cp = ncr_ccb_from_dsa(np, INL (nc_dsa));
if (!cp)
break;
memcpy(cp->cmd->sense_buffer, cp->sense_buf,
sizeof(cp->cmd->sense_buffer));
p = &cp->cmd->sense_buffer[0];
if (p[0] != 0x70 || p[2] != 0x6 || p[12] != 0x29)
break;
#if 0
(void) ncr_clear_tasks(np, HS_RESET, cp->target, cp->lun, -1);
#endif
break;
}
/*
** Print to the log the message we intend to send.
*/
if (num == SIR_TARGET_SELECTED) {
PRINT_TARGET(np, target);
ncr_printl_hex("control msgout:", np->abrt_msg,
np->abrt_tbl.size);
np->abrt_tbl.size = cpu_to_scr(np->abrt_tbl.size);
}
/*
** Let the SCRIPTS processor continue.
*/
OUTONB_STD ();
}
/*==========================================================
**
** Gérard's alchemy:) that deals with with the data
** pointer for both MDP and the residual calculation.
**
**==========================================================
**
** I didn't want to bloat the code by more than 200
** lignes for the handling of both MDP and the residual.
** This has been achieved by using a data pointer
** representation consisting in an index in the data
** array (dp_sg) and a negative offset (dp_ofs) that
** have the following meaning:
**
** - dp_sg = MAX_SCATTER
** we are at the end of the data script.
** - dp_sg < MAX_SCATTER
** dp_sg points to the next entry of the scatter array
** we want to transfer.
** - dp_ofs < 0
** dp_ofs represents the residual of bytes of the
** previous entry scatter entry we will send first.
** - dp_ofs = 0
** no residual to send first.
**
** The function ncr_evaluate_dp() accepts an arbitray
** offset (basically from the MDP message) and returns
** the corresponding values of dp_sg and dp_ofs.
**
**----------------------------------------------------------
*/
static int ncr_evaluate_dp(ncb_p np, ccb_p cp, u_int32 scr, int *ofs)
{
u_int32 dp_scr;
int dp_ofs, dp_sg, dp_sgmin;
int tmp;
struct pm_ctx *pm;
/*
** Compute the resulted data pointer in term of a script
** address within some DATA script and a signed byte offset.
*/
dp_scr = scr;
dp_ofs = *ofs;
if (dp_scr == NCB_SCRIPT_PHYS (np, pm0_data))
pm = &cp->phys.pm0;
else if (dp_scr == NCB_SCRIPT_PHYS (np, pm1_data))
pm = &cp->phys.pm1;
else
pm = 0;
if (pm) {
dp_scr = scr_to_cpu(pm->ret);
dp_ofs -= scr_to_cpu(pm->sg.size);
}
/*
** Deduce the index of the sg entry.
** Keep track of the index of the first valid entry.
** If result is dp_sg = MAX_SCATTER, then we are at the
** end of the data and vice-versa.
*/
tmp = scr_to_cpu(cp->phys.header.goalp);
dp_sg = MAX_SCATTER;
if (dp_scr != tmp)
dp_sg -= (tmp - 8 - (int)dp_scr) / (SCR_SG_SIZE*4);
dp_sgmin = MAX_SCATTER - cp->segments;
/*
** Move to the sg entry the data pointer belongs to.
**
** If we are inside the data area, we expect result to be:
**
** Either,
** dp_ofs = 0 and dp_sg is the index of the sg entry
** the data pointer belongs to (or the end of the data)
** Or,
** dp_ofs < 0 and dp_sg is the index of the sg entry
** the data pointer belongs to + 1.
*/
if (dp_ofs < 0) {
int n;
while (dp_sg > dp_sgmin) {
--dp_sg;
tmp = scr_to_cpu(cp->phys.data[dp_sg].size);
n = dp_ofs + (tmp & 0xffffff);
if (n > 0) {
++dp_sg;
break;
}
dp_ofs = n;
}
}
else if (dp_ofs > 0) {
while (dp_sg < MAX_SCATTER) {
tmp = scr_to_cpu(cp->phys.data[dp_sg].size);
dp_ofs -= (tmp & 0xffffff);
++dp_sg;
if (dp_ofs <= 0)
break;
}
}
/*
** Make sure the data pointer is inside the data area.
** If not, return some error.
*/
if (dp_sg < dp_sgmin || (dp_sg == dp_sgmin && dp_ofs < 0))
goto out_err;
else if (dp_sg > MAX_SCATTER || (dp_sg == MAX_SCATTER && dp_ofs > 0))
goto out_err;
/*
** Save the extreme pointer if needed.
*/
if (dp_sg > cp->ext_sg ||
(dp_sg == cp->ext_sg && dp_ofs > cp->ext_ofs)) {
cp->ext_sg = dp_sg;
cp->ext_ofs = dp_ofs;
}
/*
** Return data.
*/
*ofs = dp_ofs;
return dp_sg;
out_err:
return -1;
}
/*==========================================================
**
** ncr chip handler for MODIFY DATA POINTER MESSAGE
**
**==========================================================
**
** We also call this function on IGNORE WIDE RESIDUE
** messages that do not match a SWIDE full condition.
** Btw, we assume in that situation that such a message
** is equivalent to a MODIFY DATA POINTER (offset=-1).
**
**----------------------------------------------------------
*/
static void ncr_modify_dp(ncb_p np, tcb_p tp, ccb_p cp, int ofs)
{
int dp_ofs = ofs;
u_int32 dp_scr = INL (nc_temp);
u_int32 dp_ret;
u_int32 tmp;
u_char hflags;
int dp_sg;
struct pm_ctx *pm;
/*
** Not supported for auto_sense;
*/
if (cp->host_flags & HF_AUTO_SENSE)
goto out_reject;
/*
** Apply our alchemy:) (see comments in ncr_evaluate_dp()),
** to the resulted data pointer.
*/
dp_sg = ncr_evaluate_dp(np, cp, dp_scr, &dp_ofs);
if (dp_sg < 0)
goto out_reject;
/*
** And our alchemy:) allows to easily calculate the data
** script address we want to return for the next data phase.
*/
dp_ret = cpu_to_scr(cp->phys.header.goalp);
dp_ret = dp_ret - 8 - (MAX_SCATTER - dp_sg) * (SCR_SG_SIZE*4);
/*
** If offset / scatter entry is zero we donnot need
** a context for the new current data pointer.
*/
if (dp_ofs == 0) {
dp_scr = dp_ret;
goto out_ok;
}
/*
** Get a context for the new current data pointer.
*/
hflags = INB (HF_PRT);
if (hflags & HF_DP_SAVED)
hflags ^= HF_ACT_PM;
if (!(hflags & HF_ACT_PM)) {
pm = &cp->phys.pm0;
dp_scr = NCB_SCRIPT_PHYS (np, pm0_data);
}
else {
pm = &cp->phys.pm1;
dp_scr = NCB_SCRIPT_PHYS (np, pm1_data);
}
hflags &= ~(HF_DP_SAVED);
OUTB (HF_PRT, hflags);
/*
** Set up the new current data pointer.
** ofs < 0 there, and for the next data phase, we
** want to transfer part of the data of the sg entry
** corresponding to index dp_sg-1 prior to returning
** to the main data script.
*/
pm->ret = cpu_to_scr(dp_ret);
tmp = scr_to_cpu(cp->phys.data[dp_sg-1].addr);
tmp += scr_to_cpu(cp->phys.data[dp_sg-1].size) + dp_ofs;
pm->sg.addr = cpu_to_scr(tmp);
pm->sg.size = cpu_to_scr(-dp_ofs);
out_ok:
OUTL (nc_temp, dp_scr);
OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
return;
out_reject:
OUTL_DSP (NCB_SCRIPTH_PHYS (np, msg_bad));
}
/*==========================================================
**
** ncr chip calculation of the data residual.
**
**==========================================================
**
** As I used to say, the requirement of data residual
** in SCSI is broken, useless and cannot be achieved
** without huge complexity.
** But most OSes and even the official CAM require it.
** When stupidity happens to be so widely spread inside
** a community, it gets hard to convince.
**
** Anyway, I don't care, since I am not going to use
** any software that considers this data residual as
** a relevant information. :)
**
**----------------------------------------------------------
*/
static int ncr_compute_residual(ncb_p np, ccb_p cp)
{
int dp_sg, dp_sgmin, tmp;
int resid=0;
int dp_ofs = 0;
/*
* Check for some data lost or just thrown away.
* We are not required to be quite accurate in this
* situation. Btw, if we are odd for output and the
* device claims some more data, it may well happen
* than our residual be zero. :-)
*/
if (cp->xerr_status & (XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN)) {
if (cp->xerr_status & XE_EXTRA_DATA)
resid -= cp->extra_bytes;
if (cp->xerr_status & XE_SODL_UNRUN)
++resid;
if (cp->xerr_status & XE_SWIDE_OVRUN)
--resid;
}
/*
** If SCRIPTS reaches its goal point, then
** there is no additionnal residual.
*/
if (cp->phys.header.lastp == cp->phys.header.goalp)
return resid;
/*
** If the last data pointer is data_io (direction
** unknown), then no data transfer should have
** taken place.
*/
if (cp->phys.header.lastp == NCB_SCRIPTH_PHYS (np, data_io))
return cp->data_len;
/*
** If no data transfer occurs, or if the data
** pointer is weird, return full residual.
*/
if (cp->startp == cp->phys.header.lastp ||
ncr_evaluate_dp(np, cp, scr_to_cpu(cp->phys.header.lastp),
&dp_ofs) < 0) {
return cp->data_len;
}
/*
** We are now full comfortable in the computation
** of the data residual (2's complement).
*/
dp_sgmin = MAX_SCATTER - cp->segments;
resid = -cp->ext_ofs;
for (dp_sg = cp->ext_sg; dp_sg < MAX_SCATTER; ++dp_sg) {
tmp = scr_to_cpu(cp->phys.data[dp_sg].size);
resid += (tmp & 0xffffff);
}
/*
** Hopefully, the result is not too wrong.
*/
return resid;
}
/*==========================================================
**
** Print out the containt of a SCSI message.
**
**==========================================================
*/
static int ncr_show_msg (u_char * msg)
{
u_char i;
printk ("%x",*msg);
if (*msg==M_EXTENDED) {
for (i=1;i<8;i++) {
if (i-1>msg[1]) break;
printk ("-%x",msg[i]);
};
return (i+1);
} else if ((*msg & 0xf0) == 0x20) {
printk ("-%x",msg[1]);
return (2);
};
return (1);
}
static void ncr_print_msg (ccb_p cp, char *label, u_char *msg)
{
if (cp)
PRINT_ADDR(cp->cmd);
if (label)
printk ("%s: ", label);
(void) ncr_show_msg (msg);
printk (".\n");
}
/*===================================================================
**
** Negotiation for WIDE and SYNCHRONOUS DATA TRANSFER.
**
**===================================================================
**
** Was Sie schon immer ueber transfermode negotiation wissen wollten ...
**
** We try to negotiate sync and wide transfer only after
** a successful inquire command. We look at byte 7 of the
** inquire data to determine the capabilities of the target.
**
** When we try to negotiate, we append the negotiation message
** to the identify and (maybe) simple tag message.
** The host status field is set to HS_NEGOTIATE to mark this
** situation.
**
** If the target doesn't answer this message immediately
** (as required by the standard), the SIR_NEGO_FAILED interrupt
** will be raised eventually.
** The handler removes the HS_NEGOTIATE status, and sets the
** negotiated value to the default (async / nowide).
**
** If we receive a matching answer immediately, we check it
** for validity, and set the values.
**
** If we receive a Reject message immediately, we assume the
** negotiation has failed, and fall back to standard values.
**
** If we receive a negotiation message while not in HS_NEGOTIATE
** state, it's a target initiated negotiation. We prepare a
** (hopefully) valid answer, set our parameters, and send back
** this answer to the target.
**
** If the target doesn't fetch the answer (no message out phase),
** we assume the negotiation has failed, and fall back to default
** settings (SIR_NEGO_PROTO interrupt).
**
** When we set the values, we adjust them in all ccbs belonging
** to this target, in the controller's register, and in the "phys"
** field of the controller's struct ncb.
**
**---------------------------------------------------------------------
*/
/*==========================================================
**
** ncr chip handler for SYNCHRONOUS DATA TRANSFER
** REQUEST (SDTR) message.
**
**==========================================================
**
** Read comments above.
**
**----------------------------------------------------------
*/
static void ncr_sync_nego(ncb_p np, tcb_p tp, ccb_p cp)
{
u_char scntl3, scntl4;
u_char chg, ofs, per, fak;
/*
** Synchronous request message received.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
ncr_print_msg(cp, "sync msg in", np->msgin);
};
/*
** get requested values.
*/
chg = 0;
per = np->msgin[3];
ofs = np->msgin[4];
if (ofs==0) per=255;
/*
** if target sends SDTR message,
** it CAN transfer synch.
*/
if (ofs)
tp->inq_byte7 |= INQ7_SYNC;
/*
** check values against driver limits.
*/
if (per < np->minsync)
{chg = 1; per = np->minsync;}
if (per < tp->minsync)
{chg = 1; per = tp->minsync;}
if (ofs > np->maxoffs_st)
{chg = 1; ofs = np->maxoffs_st;}
if (ofs > tp->maxoffs)
{chg = 1; ofs = tp->maxoffs;}
/*
** Check against controller limits.
*/
fak = 7;
scntl3 = 0;
scntl4 = 0;
if (ofs != 0) {
ncr_getsync(np, per, &fak, &scntl3);
if (fak > 7) {
chg = 1;
ofs = 0;
}
}
if (ofs == 0) {
fak = 7;
per = 0;
scntl3 = 0;
scntl4 = 0;
tp->minsync = 0;
}
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printk ("sync: per=%d scntl3=0x%x scntl4=0x%x ofs=%d fak=%d chg=%d.\n",
per, scntl3, scntl4, ofs, fak, chg);
}
if (INB (HS_PRT) == HS_NEGOTIATE) {
OUTB (HS_PRT, HS_BUSY);
switch (cp->nego_status) {
case NS_SYNC:
/*
** This was an answer message
*/
if (chg) {
/*
** Answer wasn't acceptable.
*/
ncr_setsync (np, cp, 0, 0xe0, 0);
OUTL_DSP (NCB_SCRIPTH_PHYS (np, msg_bad));
} else {
/*
** Answer is ok.
*/
if ((np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66))
ncr_setsync (np, cp, scntl3, (fak<<5)|ofs,0);
else
ncr_setsync (np, cp, scntl3, ofs, scntl4);
OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
};
return;
case NS_WIDE:
ncr_setwide (np, cp, 0, 0);
break;
};
};
/*
** It was a request. Set value and
** prepare an answer message
*/
if ((np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66))
ncr_setsync (np, cp, scntl3, (fak<<5)|ofs,0);
else
ncr_setsync (np, cp, scntl3, ofs, scntl4);
np->msgout[0] = M_EXTENDED;
np->msgout[1] = 3;
np->msgout[2] = M_X_SYNC_REQ;
np->msgout[3] = per;
np->msgout[4] = ofs;
cp->nego_status = NS_SYNC;
if (DEBUG_FLAGS & DEBUG_NEGO) {
ncr_print_msg(cp, "sync msgout", np->msgout);
}
np->msgin [0] = M_NOOP;
if (!ofs)
OUTL_DSP (NCB_SCRIPTH_PHYS (np, msg_bad));
else
OUTL_DSP (NCB_SCRIPTH_PHYS (np, sdtr_resp));
}
/*==========================================================
**
** ncr chip handler for WIDE DATA TRANSFER REQUEST
** (WDTR) message.
**
**==========================================================
**
** Read comments above.
**
**----------------------------------------------------------
*/
static void ncr_wide_nego(ncb_p np, tcb_p tp, ccb_p cp)
{
u_char chg, wide;
/*
** Wide request message received.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
ncr_print_msg(cp, "wide msgin", np->msgin);
};
/*
** get requested values.
*/
chg = 0;
wide = np->msgin[3];
/*
** if target sends WDTR message,
** it CAN transfer wide.
*/
if (wide)
tp->inq_byte7 |= INQ7_WIDE16;
/*
** check values against driver limits.
*/
if (wide > tp->usrwide)
{chg = 1; wide = tp->usrwide;}
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printk ("wide: wide=%d chg=%d.\n", wide, chg);
}
if (INB (HS_PRT) == HS_NEGOTIATE) {
OUTB (HS_PRT, HS_BUSY);
switch (cp->nego_status) {
case NS_WIDE:
/*
** This was an answer message
*/
if (chg) {
/*
** Answer wasn't acceptable.
*/
ncr_setwide (np, cp, 0, 1);
OUTL_DSP (NCB_SCRIPTH_PHYS (np, msg_bad));
} else {
/*
** Answer is ok.
*/
ncr_setwide (np, cp, wide, 1);
OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
};
return;
case NS_SYNC:
ncr_setsync (np, cp, 0, 0xe0, 0);
break;
};
};
/*
** It was a request, set value and
** prepare an answer message
*/
ncr_setwide (np, cp, wide, 1);
np->msgout[0] = M_EXTENDED;
np->msgout[1] = 2;
np->msgout[2] = M_X_WIDE_REQ;
np->msgout[3] = wide;
np->msgin [0] = M_NOOP;
cp->nego_status = NS_WIDE;
if (DEBUG_FLAGS & DEBUG_NEGO) {
ncr_print_msg(cp, "wide msgout", np->msgout);
}
OUTL_DSP (NCB_SCRIPTH_PHYS (np, wdtr_resp));
}
/*==========================================================
**
** ncr chip handler for PARALLEL PROTOCOL REQUEST
** (PPR) message.
**
**==========================================================
**
** Read comments above.
**
**----------------------------------------------------------
*/
static void ncr_ppr_nego(ncb_p np, tcb_p tp, ccb_p cp)
{
u_char scntl3, scntl4;
u_char chg, ofs, per, fak, wth, dt;
/*
** PPR message received.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
ncr_print_msg(cp, "ppr msg in", np->msgin);
};
/*
** get requested values.
*/
chg = 0;
per = np->msgin[3];
ofs = np->msgin[5];
wth = np->msgin[6];
dt = np->msgin[7];
if (ofs==0) per=255;
/*
** if target sends sync (wide),
** it CAN transfer synch (wide).
*/
if (ofs)
tp->inq_byte7 |= INQ7_SYNC;
if (wth)
tp->inq_byte7 |= INQ7_WIDE16;
/*
** check values against driver limits.
*/
if (wth > tp->usrwide)
{chg = 1; wth = tp->usrwide;}
if (per < np->minsync)
{chg = 1; per = np->minsync;}
if (per < tp->minsync)
{chg = 1; per = tp->minsync;}
if (ofs > tp->maxoffs)
{chg = 1; ofs = tp->maxoffs;}
/*
** Check against controller limits.
*/
fak = 7;
scntl3 = 0;
scntl4 = 0;
if (ofs != 0) {
scntl4 = dt ? 0x80 : 0;
ncr_getsync(np, per, &fak, &scntl3);
if (fak > 7) {
chg = 1;
ofs = 0;
}
}
if (ofs == 0) {
fak = 7;
per = 0;
scntl3 = 0;
scntl4 = 0;
tp->minsync = 0;
}
/*
** If target responds with Ultra 3 speed
** but narrow or not DT, reject.
** If target responds with DT request
** but not Ultra3 speeds, reject message,
** reset min sync for target to 0x0A and
** set flags to re-negotiate.
*/
if ((per == 0x09) && ofs && (!wth || !dt))
chg = 1;
else if (( (per > 0x09) && dt) )
chg = 2;
/* Not acceptable since beyond controller limit */
if (!dt && ofs > np->maxoffs_st)
{chg = 2; ofs = np->maxoffs_st;}
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printk ("ppr: wth=%d per=%d scntl3=0x%x scntl4=0x%x ofs=%d fak=%d chg=%d.\n",
wth, per, scntl3, scntl4, ofs, fak, chg);
}
if (INB (HS_PRT) == HS_NEGOTIATE) {
OUTB (HS_PRT, HS_BUSY);
switch (cp->nego_status) {
case NS_PPR:
/*
** This was an answer message
*/
if (chg) {
/*
** Answer wasn't acceptable.
*/
if (chg == 2) {
/* Send message reject and reset flags for
** host to re-negotiate with min period 0x0A.
*/
tp->minsync = 0x0A;
tp->period = 0;
tp->widedone = 0;
}
ncr_setsyncwide (np, cp, 0, 0xe0, 0, 0);
OUTL_DSP (NCB_SCRIPTH_PHYS (np, msg_bad));
} else {
/*
** Answer is ok.
*/
if ((np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66))
ncr_setsyncwide (np, cp, scntl3, (fak<<5)|ofs,0, wth);
else
ncr_setsyncwide (np, cp, scntl3, ofs, scntl4, wth);
OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
};
return;
case NS_SYNC:
ncr_setsync (np, cp, 0, 0xe0, 0);
break;
case NS_WIDE:
ncr_setwide (np, cp, 0, 0);
break;
};
};
/*
** It was a request. Set value and
** prepare an answer message
**
** If narrow or not DT and requesting Ultra3
** slow the bus down and force ST. If not
** requesting Ultra3, force ST.
** Max offset is 31=0x1f if ST mode.
*/
if ((per == 0x09) && ofs && (!wth || !dt)) {
per = 0x0A;
dt = 0;
}
else if ( (per > 0x09) && dt) {
dt = 0;
}
if (!dt && ofs > np->maxoffs_st)
ofs = np->maxoffs_st;
if ((np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66))
ncr_setsyncwide (np, cp, scntl3, (fak<<5)|ofs,0, wth);
else
ncr_setsyncwide (np, cp, scntl3, ofs, scntl4, wth);
np->msgout[0] = M_EXTENDED;
np->msgout[1] = 6;
np->msgout[2] = M_X_PPR_REQ;
np->msgout[3] = per;
np->msgout[4] = 0;
np->msgout[5] = ofs;
np->msgout[6] = wth;
np->msgout[7] = dt;
cp->nego_status = NS_PPR;
if (DEBUG_FLAGS & DEBUG_NEGO) {
ncr_print_msg(cp, "ppr msgout", np->msgout);
}
np->msgin [0] = M_NOOP;
if (!ofs)
OUTL_DSP (NCB_SCRIPTH_PHYS (np, msg_bad));
else
OUTL_DSP (NCB_SCRIPTH_PHYS (np, ppr_resp));
}
/*
** Reset SYNC or WIDE to default settings.
** Called when a negotiation does not succeed either
** on rejection or on protocol error.
*/
static void ncr_nego_default(ncb_p np, tcb_p tp, ccb_p cp)
{
/*
** any error in negotiation:
** fall back to default mode.
*/
switch (cp->nego_status) {
case NS_SYNC:
ncr_setsync (np, cp, 0, 0xe0, 0);
break;
case NS_WIDE:
ncr_setwide (np, cp, 0, 0);
break;
case NS_PPR:
/*
* ppr_negotiation is set to 1 on the first ppr nego command.
* If ppr is successful, it is reset to 2.
* If unsuccessful it is reset to 0.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
tcb_p tp=&np->target[cp->target];
u_char factor, offset, width;
ncr_get_xfer_info ( np, tp, &factor, &offset, &width);
printk("Current factor %d offset %d width %d\n",
factor, offset, width);
}
if (tp->ppr_negotiation == 2)
ncr_setsyncwide (np, cp, 0, 0xe0, 0, 0);
else if (tp->ppr_negotiation == 1) {
/* First ppr command has received a M REJECT.
* Do not change the existing wide/sync parameter
* values (asyn/narrow if this as the first nego;
* may be different if target initiates nego.).
*/
tp->ppr_negotiation = 0;
}
else
{
tp->ppr_negotiation = 0;
ncr_setwide (np, cp, 0, 0);
}
break;
};
np->msgin [0] = M_NOOP;
np->msgout[0] = M_NOOP;
cp->nego_status = 0;
}
/*==========================================================
**
** ncr chip handler for MESSAGE REJECT received for
** a WIDE or SYNCHRONOUS negotiation.
**
** clear the PPR negotiation flag, all future nego.
** will be SDTR and WDTR
**
**==========================================================
**
** Read comments above.
**
**----------------------------------------------------------
*/
static void ncr_nego_rejected(ncb_p np, tcb_p tp, ccb_p cp)
{
ncr_nego_default(np, tp, cp);
OUTB (HS_PRT, HS_BUSY);
}
/*==========================================================
**
**
** ncr chip exception handler for programmed interrupts.
**
**
**==========================================================
*/
void ncr_int_sir (ncb_p np)
{
u_char num = INB (nc_dsps);
u_long dsa = INL (nc_dsa);
ccb_p cp = ncr_ccb_from_dsa(np, dsa);
u_char target = INB (nc_sdid) & 0x0f;
tcb_p tp = &np->target[target];
int tmp;
if (DEBUG_FLAGS & DEBUG_TINY) printk ("I#%d", num);
switch (num) {
/*
** See comments in the SCRIPTS code.
*/
#ifdef SCSI_NCR_PCIQ_SYNC_ON_INTR
case SIR_DUMMY_INTERRUPT:
goto out;
#endif
/*
** The C code is currently trying to recover from something.
** Typically, user want to abort some command.
*/
case SIR_SCRIPT_STOPPED:
case SIR_TARGET_SELECTED:
case SIR_ABORT_SENT:
case SIR_AUTO_SENSE_DONE:
ncr_sir_task_recovery(np, num);
return;
/*
** The device didn't go to MSG OUT phase after having
** been selected with ATN. We donnot want to handle
** that.
*/
case SIR_SEL_ATN_NO_MSG_OUT:
printk ("%s:%d: No MSG OUT phase after selection with ATN.\n",
ncr_name (np), target);
goto out_stuck;
/*
** The device didn't switch to MSG IN phase after
** having reseleted the initiator.
*/
case SIR_RESEL_NO_MSG_IN:
/*
** After reselection, the device sent a message that wasn't
** an IDENTIFY.
*/
case SIR_RESEL_NO_IDENTIFY:
/*
** If devices reselecting without sending an IDENTIFY
** message still exist, this should help.
** We just assume lun=0, 1 CCB, no tag.
*/
if (tp->l0p) {
OUTL (nc_dsa, scr_to_cpu(tp->l0p->tasktbl[0]));
OUTL_DSP (NCB_SCRIPT_PHYS (np, resel_go));
return;
}
/*
** The device reselected a LUN we donnot know of.
*/
case SIR_RESEL_BAD_LUN:
np->msgout[0] = M_RESET;
goto out;
/*
** The device reselected for an untagged nexus and we
** haven't any.
*/
case SIR_RESEL_BAD_I_T_L:
np->msgout[0] = M_ABORT;
goto out;
/*
** The device reselected for a tagged nexus that we donnot
** have.
*/
case SIR_RESEL_BAD_I_T_L_Q:
np->msgout[0] = M_ABORT_TAG;
goto out;
/*
** The SCRIPTS let us know that the device has grabbed
** our message and will abort the job.
*/
case SIR_RESEL_ABORTED:
np->lastmsg = np->msgout[0];
np->msgout[0] = M_NOOP;
printk ("%s:%d: message %x sent on bad reselection.\n",
ncr_name (np), target, np->lastmsg);
goto out;
/*
** The SCRIPTS let us know that a message has been
** successfully sent to the device.
*/
case SIR_MSG_OUT_DONE:
np->lastmsg = np->msgout[0];
np->msgout[0] = M_NOOP;
/* Should we really care of that */
if (np->lastmsg == M_PARITY || np->lastmsg == M_ID_ERROR) {
if (cp) {
cp->xerr_status &= ~XE_PARITY_ERR;
if (!cp->xerr_status)
OUTOFFB (HF_PRT, HF_EXT_ERR);
}
}
goto out;
/*
** The device didn't send a GOOD SCSI status.
** We may have some work to do prior to allow
** the SCRIPTS processor to continue.
*/
case SIR_BAD_STATUS:
if (!cp)
goto out;
ncr_sir_to_redo(np, num, cp);
return;
/*
** We are asked by the SCRIPTS to prepare a
** REJECT message.
*/
case SIR_REJECT_TO_SEND:
ncr_print_msg(cp, "M_REJECT to send for ", np->msgin);
np->msgout[0] = M_REJECT;
goto out;
/*
** We have been ODD at the end of a DATA IN
** transfer and the device didn't send a
** IGNORE WIDE RESIDUE message.
** It is a data overrun condition.
*/
case SIR_SWIDE_OVERRUN:
if (cp) {
OUTONB (HF_PRT, HF_EXT_ERR);
cp->xerr_status |= XE_SWIDE_OVRUN;
}
goto out;
/*
** We have been ODD at the end of a DATA OUT
** transfer.
** It is a data underrun condition.
*/
case SIR_SODL_UNDERRUN:
if (cp) {
OUTONB (HF_PRT, HF_EXT_ERR);
cp->xerr_status |= XE_SODL_UNRUN;
}
goto out;
/*
** The device wants us to tranfer more data than
** expected or in the wrong direction.
** The number of extra bytes is in scratcha.
** It is a data overrun condition.
*/
case SIR_DATA_OVERRUN:
if (cp) {
OUTONB (HF_PRT, HF_EXT_ERR);
cp->xerr_status |= XE_EXTRA_DATA;
cp->extra_bytes += INL (nc_scratcha);
}
goto out;
/*
** The device switched to an illegal phase (4/5).
*/
case SIR_BAD_PHASE:
if (cp) {
OUTONB (HF_PRT, HF_EXT_ERR);
cp->xerr_status |= XE_BAD_PHASE;
}
goto out;
/*
** We received a message.
*/
case SIR_MSG_RECEIVED:
if (!cp)
goto out_stuck;
switch (np->msgin [0]) {
/*
** We received an extended message.
** We handle MODIFY DATA POINTER, SDTR, WDTR
** and reject all other extended messages.
*/
case M_EXTENDED:
switch (np->msgin [2]) {
case M_X_MODIFY_DP:
if (DEBUG_FLAGS & DEBUG_POINTER)
ncr_print_msg(cp,"modify DP",np->msgin);
tmp = (np->msgin[3]<<24) + (np->msgin[4]<<16) +
(np->msgin[5]<<8) + (np->msgin[6]);
ncr_modify_dp(np, tp, cp, tmp);
return;
case M_X_SYNC_REQ:
ncr_sync_nego(np, tp, cp);
return;
case M_X_WIDE_REQ:
ncr_wide_nego(np, tp, cp);
return;
case M_X_PPR_REQ:
ncr_ppr_nego(np, tp, cp);
return;
default:
goto out_reject;
}
break;
/*
** We received a 1/2 byte message not handled from SCRIPTS.
** We are only expecting MESSAGE REJECT and IGNORE WIDE
** RESIDUE messages that haven't been anticipated by
** SCRIPTS on SWIDE full condition. Unanticipated IGNORE
** WIDE RESIDUE messages are aliased as MODIFY DP (-1).
*/
case M_IGN_RESIDUE:
if (DEBUG_FLAGS & DEBUG_POINTER)
ncr_print_msg(cp,"ign wide residue", np->msgin);
ncr_modify_dp(np, tp, cp, -1);
return;
case M_REJECT:
if (INB (HS_PRT) == HS_NEGOTIATE)
ncr_nego_rejected(np, tp, cp);
else {
PRINT_ADDR(cp->cmd);
printk ("M_REJECT received (%x:%x).\n",
scr_to_cpu(np->lastmsg), np->msgout[0]);
}
goto out_clrack;
break;
default:
goto out_reject;
}
break;
/*
** We received an unknown message.
** Ignore all MSG IN phases and reject it.
*/
case SIR_MSG_WEIRD:
ncr_print_msg(cp, "WEIRD message received", np->msgin);
OUTL_DSP (NCB_SCRIPTH_PHYS (np, msg_weird));
return;
/*
** Negotiation failed.
** Target does not send us the reply.
** Remove the HS_NEGOTIATE status.
*/
case SIR_NEGO_FAILED:
OUTB (HS_PRT, HS_BUSY);
/*
** Negotiation failed.
** Target does not want answer message.
*/
case SIR_NEGO_PROTO:
ncr_nego_default(np, tp, cp);
goto out;
};
out:
OUTONB_STD ();
return;
out_reject:
OUTL_DSP (NCB_SCRIPTH_PHYS (np, msg_bad));
return;
out_clrack:
OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
return;
out_stuck:
return;
}
/*==========================================================
**
**
** Acquire a control block
**
**
**==========================================================
*/
static ccb_p ncr_get_ccb (ncb_p np, u_char tn, u_char ln)
{
tcb_p tp = &np->target[tn];
lcb_p lp = ncr_lp(np, tp, ln);
u_short tag = NO_TAG;
XPT_QUEHEAD *qp;
ccb_p cp = (ccb_p) 0;
/*
** Allocate a new CCB if needed.
*/
if (xpt_que_empty(&np->free_ccbq))
(void) ncr_alloc_ccb(np);
/*
** Look for a free CCB
*/
qp = xpt_remque_head(&np->free_ccbq);
if (!qp)
goto out;
cp = xpt_que_entry(qp, struct ccb, link_ccbq);
/*
** If the LCB is not yet available and we already
** have queued a CCB for a LUN without LCB,
** give up. Otherwise all is fine. :-)
*/
if (!lp) {
if (xpt_que_empty(&np->b0_ccbq))
xpt_insque_head(&cp->link_ccbq, &np->b0_ccbq);
else
goto out_free;
} else {
/*
** Tune tag mode if asked by user.
*/
if (lp->queuedepth != lp->numtags) {
ncr_setup_tags(np, tn, ln);
}
/*
** Get a tag for this nexus if required.
** Keep from using more tags than we can handle.
*/
if (lp->usetags) {
if (lp->busyccbs < lp->maxnxs) {
tag = lp->cb_tags[lp->ia_tag];
++lp->ia_tag;
if (lp->ia_tag == MAX_TAGS)
lp->ia_tag = 0;
cp->tags_si = lp->tags_si;
++lp->tags_sum[cp->tags_si];
}
else
goto out_free;
}
/*
** Put the CCB in the LUN wait queue and
** count it as busy.
*/
xpt_insque_tail(&cp->link_ccbq, &lp->wait_ccbq);
++lp->busyccbs;
}
/*
** Remember all informations needed to free this CCB.
*/
cp->to_abort = 0;
cp->tag = tag;
cp->target = tn;
cp->lun = ln;
if (DEBUG_FLAGS & DEBUG_TAGS) {
PRINT_LUN(np, tn, ln);
printk ("ccb @%p using tag %d.\n", cp, tag);
}
out:
return cp;
out_free:
xpt_insque_head(&cp->link_ccbq, &np->free_ccbq);
return (ccb_p) 0;
}
/*==========================================================
**
**
** Release one control block
**
**
**==========================================================
*/
static void ncr_free_ccb (ncb_p np, ccb_p cp)
{
tcb_p tp = &np->target[cp->target];
lcb_p lp = ncr_lp(np, tp, cp->lun);
if (DEBUG_FLAGS & DEBUG_TAGS) {
PRINT_LUN(np, cp->target, cp->lun);
printk ("ccb @%p freeing tag %d.\n", cp, cp->tag);
}
/*
** If lun control block available, make available
** the task slot and the tag if any.
** Decrement counters.
*/
if (lp) {
if (cp->tag != NO_TAG) {
lp->cb_tags[lp->if_tag++] = cp->tag;
if (lp->if_tag == MAX_TAGS)
lp->if_tag = 0;
--lp->tags_sum[cp->tags_si];
lp->tasktbl[cp->tag] = cpu_to_scr(np->p_bad_i_t_l_q);
} else {
lp->tasktbl[0] = cpu_to_scr(np->p_bad_i_t_l);
}
--lp->busyccbs;
if (cp->queued) {
--lp->queuedccbs;
}
}
/*
** Make this CCB available.
*/
xpt_remque(&cp->link_ccbq);
xpt_insque_head(&cp->link_ccbq, &np->free_ccbq);
cp -> host_status = HS_IDLE;
cp -> queued = 0;
}
/*------------------------------------------------------------------------
** Allocate a CCB and initialize its fixed part.
**------------------------------------------------------------------------
**------------------------------------------------------------------------
*/
static ccb_p ncr_alloc_ccb(ncb_p np)
{
ccb_p cp = 0;
int hcode;
/*
** Allocate memory for this CCB.
*/
cp = m_calloc_dma(sizeof(struct ccb), "CCB");
if (!cp)
return 0;
/*
** Count it and initialyze it.
*/
np->actccbs++;
/*
** Remember virtual and bus address of this ccb.
*/
cp->p_ccb = vtobus(cp);
/*
** Insert this ccb into the hashed list.
*/
hcode = CCB_HASH_CODE(cp->p_ccb);
cp->link_ccbh = np->ccbh[hcode];
np->ccbh[hcode] = cp;
/*
** Initialyze the start and restart actions.
*/
cp->phys.header.go.start = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
cp->phys.header.go.restart = cpu_to_scr(NCB_SCRIPTH_PHYS(np,bad_i_t_l));
/*
** Initilialyze some other fields.
*/
cp->phys.smsg_ext.addr = cpu_to_scr(NCB_PHYS(np, msgin[2]));
/*
** Chain into wakeup list and free ccb queue.
*/
cp->link_ccb = np->ccbc;
np->ccbc = cp;
xpt_insque_head(&cp->link_ccbq, &np->free_ccbq);
return cp;
}
/*------------------------------------------------------------------------
** Look up a CCB from a DSA value.
**------------------------------------------------------------------------
**------------------------------------------------------------------------
*/
static ccb_p ncr_ccb_from_dsa(ncb_p np, u_long dsa)
{
int hcode;
ccb_p cp;
hcode = CCB_HASH_CODE(dsa);
cp = np->ccbh[hcode];
while (cp) {
if (cp->p_ccb == dsa)
break;
cp = cp->link_ccbh;
}
return cp;
}
/*==========================================================
**
**
** Allocation of resources for Targets/Luns/Tags.
**
**
**==========================================================
*/
/*------------------------------------------------------------------------
** Target control block initialisation.
**------------------------------------------------------------------------
** This data structure is fully initialized after a SCSI command
** has been successfully completed for this target.
**------------------------------------------------------------------------
*/
static void ncr_init_tcb (ncb_p np, u_char tn)
{
/*
** Check some alignments required by the chip.
*/
assert (( (offsetof(struct ncr_reg, nc_sxfer) ^
offsetof(struct tcb , sval )) &3) == 0);
assert (( (offsetof(struct ncr_reg, nc_scntl3) ^
offsetof(struct tcb , wval )) &3) == 0);
if ((np->device_id == PCI_DEVICE_ID_LSI_53C1010) ||
(np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)){
assert (( (offsetof(struct ncr_reg, nc_scntl4) ^
offsetof(struct tcb , uval )) &3) == 0);
}
}
/*------------------------------------------------------------------------
** Lun control block allocation and initialization.
**------------------------------------------------------------------------
** This data structure is allocated and initialized after a SCSI
** command has been successfully completed for this target/lun.
**------------------------------------------------------------------------
*/
static lcb_p ncr_alloc_lcb (ncb_p np, u_char tn, u_char ln)
{
tcb_p tp = &np->target[tn];
lcb_p lp = ncr_lp(np, tp, ln);
/*
** Already done, return.
*/
if (lp)
return lp;
/*
** Initialize the target control block if not yet.
*/
ncr_init_tcb(np, tn);
/*
** Allocate the lcb bus address array.
** Compute the bus address of this table.
*/
if (ln && !tp->luntbl) {
int i;
tp->luntbl = m_calloc_dma(256, "LUNTBL");
if (!tp->luntbl)
goto fail;
for (i = 0 ; i < 64 ; i++)
tp->luntbl[i] = cpu_to_scr(NCB_PHYS(np, resel_badlun));
tp->b_luntbl = cpu_to_scr(vtobus(tp->luntbl));
}
/*
** Allocate the table of pointers for LUN(s) > 0, if needed.
*/
if (ln && !tp->lmp) {
tp->lmp = m_calloc(MAX_LUN * sizeof(lcb_p), "LMP");
if (!tp->lmp)
goto fail;
}
/*
** Allocate the lcb.
** Make it available to the chip.
*/
lp = m_calloc_dma(sizeof(struct lcb), "LCB");
if (!lp)
goto fail;
if (ln) {
tp->lmp[ln] = lp;
tp->luntbl[ln] = cpu_to_scr(vtobus(lp));
}
else {
tp->l0p = lp;
tp->b_lun0 = cpu_to_scr(vtobus(lp));
}
/*
** Initialize the CCB queue headers.
*/
xpt_que_init(&lp->busy_ccbq);
xpt_que_init(&lp->wait_ccbq);
/*
** Set max CCBs to 1 and use the default task array
** by default.
*/
lp->maxnxs = 1;
lp->tasktbl = &lp->tasktbl_0;
lp->b_tasktbl = cpu_to_scr(vtobus(lp->tasktbl));
lp->tasktbl[0] = cpu_to_scr(np->p_notask);
lp->resel_task = cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_notag));
/*
** Initialize command queuing control.
*/
lp->busyccbs = 1;
lp->queuedccbs = 1;
lp->queuedepth = 1;
fail:
return lp;
}
/*------------------------------------------------------------------------
** Lun control block setup on INQUIRY data received.
**------------------------------------------------------------------------
** We only support WIDE, SYNC for targets and CMDQ for logical units.
** This setup is done on each INQUIRY since we are expecting user
** will play with CHANGE DEFINITION commands. :-)
**------------------------------------------------------------------------
*/
static lcb_p ncr_setup_lcb (ncb_p np, u_char tn, u_char ln, u_char *inq_data)
{
tcb_p tp = &np->target[tn];
lcb_p lp = ncr_lp(np, tp, ln);
u_char inq_byte7;
int i;
/*
** If no lcb, try to allocate it.
*/
if (!lp && !(lp = ncr_alloc_lcb(np, tn, ln)))
goto fail;
#if 0 /* No more used. Left here as provision */
/*
** Get device quirks.
*/
tp->quirks = 0;
if (tp->quirks && bootverbose) {
PRINT_LUN(np, tn, ln);
printk ("quirks=%x.\n", tp->quirks);
}
#endif
/*
** Evaluate trustable target/unit capabilities.
** We only believe device version >= SCSI-2 that
** use appropriate response data format (2).
** But it seems that some CCS devices also
** support SYNC and I donnot want to frustrate
** anybody. ;-)
*/
inq_byte7 = 0;
if ((inq_data[2] & 0x7) >= 2 && (inq_data[3] & 0xf) == 2)
inq_byte7 = inq_data[7];
else if ((inq_data[2] & 0x7) == 1 && (inq_data[3] & 0xf) == 1)
inq_byte7 = INQ7_SYNC;
/*
** Throw away announced LUN capabilities if we are told
** that there is no real device supported by the logical unit.
*/
if ((inq_data[0] & 0xe0) > 0x20 || (inq_data[0] & 0x1f) == 0x1f)
inq_byte7 &= (INQ7_SYNC | INQ7_WIDE16);
/*
** If user is wanting SYNC, force this feature.
*/
if (driver_setup.force_sync_nego)
inq_byte7 |= INQ7_SYNC;
/*
** Prepare negotiation if SIP capabilities have changed.
*/
tp->inq_done = 1;
if ((inq_byte7 ^ tp->inq_byte7) & (INQ7_SYNC | INQ7_WIDE16)) {
tp->inq_byte7 = inq_byte7;
ncr_negotiate(np, tp);
}
/*
** If unit supports tagged commands, allocate and
** initialyze the task table if not yet.
*/
if ((inq_byte7 & INQ7_QUEUE) && lp->tasktbl == &lp->tasktbl_0) {
lp->tasktbl = m_calloc_dma(MAX_TASKS*4, "TASKTBL");
if (!lp->tasktbl) {
lp->tasktbl = &lp->tasktbl_0;
goto fail;
}
lp->b_tasktbl = cpu_to_scr(vtobus(lp->tasktbl));
for (i = 0 ; i < MAX_TASKS ; i++)
lp->tasktbl[i] = cpu_to_scr(np->p_notask);
lp->cb_tags = m_calloc(MAX_TAGS, "CB_TAGS");
if (!lp->cb_tags)
goto fail;
for (i = 0 ; i < MAX_TAGS ; i++)
lp->cb_tags[i] = i;
lp->maxnxs = MAX_TAGS;
lp->tags_stime = ktime_get(3*HZ);
}
/*
** Adjust tagged queueing status if needed.
*/
if ((inq_byte7 ^ lp->inq_byte7) & INQ7_QUEUE) {
lp->inq_byte7 = inq_byte7;
lp->numtags = lp->maxtags;
ncr_setup_tags (np, tn, ln);
}
fail:
return lp;
}
/*==========================================================
**
**
** Build Scatter Gather Block
**
**
**==========================================================
**
** The transfer area may be scattered among
** several non adjacent physical pages.
**
** We may use MAX_SCATTER blocks.
**
**----------------------------------------------------------
*/
/*
** We try to reduce the number of interrupts caused
** by unexpected phase changes due to disconnects.
** A typical harddisk may disconnect before ANY block.
** If we wanted to avoid unexpected phase changes at all
** we had to use a break point every 512 bytes.
** Of course the number of scatter/gather blocks is
** limited.
** Under Linux, the scatter/gatter blocks are provided by
** the generic driver. We just have to copy addresses and
** sizes to the data segment array.
*/
/*
** For 64 bit systems, we use the 8 upper bits of the size field
** to provide bus address bits 32-39 to the SCRIPTS processor.
** This allows the 895A and 896 to address up to 1 TB of memory.
** For 32 bit chips on 64 bit systems, we must be provided with
** memory addresses that fit into the first 32 bit bus address
** range and so, this does not matter and we expect an error from
** the chip if this ever happen.
**
** We use a separate function for the case Linux does not provide
** a scatter list in order to allow better code optimization
** for the case we have a scatter list (BTW, for now this just wastes
** about 40 bytes of code for x86, but my guess is that the scatter
** code will get more complex later).
*/
#define SCATTER_ONE(data, badd, len) \
(data)->addr = cpu_to_scr(badd); \
(data)->size = cpu_to_scr((((badd) >> 8) & 0xff000000) + len);
#define CROSS_16MB(p, n) (((((u_long) p) + n - 1) ^ ((u_long) p)) & ~0xffffff)
static int ncr_scatter_no_sglist(ncb_p np, ccb_p cp, Scsi_Cmnd *cmd)
{
struct scr_tblmove *data = &cp->phys.data[MAX_SCATTER-1];
int segment;
cp->data_len = cmd->request_bufflen;
if (cmd->request_bufflen) {
dma_addr_t baddr = map_scsi_single_data(np, cmd);
SCATTER_ONE(data, baddr, cmd->request_bufflen);
if (CROSS_16MB(baddr, cmd->request_bufflen)) {
cp->host_flags |= HF_PM_TO_C;
#ifdef DEBUG_896R1
printk("He! we are crossing a 16 MB boundary (0x%lx, 0x%x)\n",
baddr, cmd->request_bufflen);
#endif
}
segment = 1;
}
else
segment = 0;
return segment;
}
/*
** DEL 472 - 53C896 Rev 1 - Part Number 609-0393055 - ITEM 5.
**
** We disable data phase mismatch handling from SCRIPTS for data
** transfers that contains scatter/gather entries that cross
** a 16 MB boundary.
** We use a different scatter function for 896 rev. 1 that needs
** such a work-around. Doing so, we do not affect performance for
** other chips.
** This problem should not be triggered for disk IOs under Linux,
** since such IOs are performed using pages and buffers that are
** nicely power-of-two sized and aligned. But, since this may change
** at any time, a work-around was required.
*/
static int ncr_scatter_896R1(ncb_p np, ccb_p cp, Scsi_Cmnd *cmd)
{
int segn;
int use_sg = (int) cmd->use_sg;
cp->data_len = 0;
if (!use_sg)
segn = ncr_scatter_no_sglist(np, cp, cmd);
else {
struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
struct scr_tblmove *data;
use_sg = map_scsi_sg_data(np, cmd);
if (use_sg > MAX_SCATTER) {
unmap_scsi_data(np, cmd);
return -1;
}
data = &cp->phys.data[MAX_SCATTER - use_sg];
for (segn = 0; segn < use_sg; segn++) {
dma_addr_t baddr = scsi_sg_dma_address(&scatter[segn]);
unsigned int len = scsi_sg_dma_len(&scatter[segn]);
SCATTER_ONE(&data[segn],
baddr,
len);
if (CROSS_16MB(baddr, scatter[segn].length)) {
cp->host_flags |= HF_PM_TO_C;
#ifdef DEBUG_896R1
printk("He! we are crossing a 16 MB boundary (0x%lx, 0x%x)\n",
baddr, scatter[segn].length);
#endif
}
cp->data_len += len;
}
}
return segn;
}
static int ncr_scatter(ncb_p np, ccb_p cp, Scsi_Cmnd *cmd)
{
int segment;
int use_sg = (int) cmd->use_sg;
cp->data_len = 0;
if (!use_sg)
segment = ncr_scatter_no_sglist(np, cp, cmd);
else {
struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
struct scr_tblmove *data;
use_sg = map_scsi_sg_data(np, cmd);
if (use_sg > MAX_SCATTER) {
unmap_scsi_data(np, cmd);
return -1;
}
data = &cp->phys.data[MAX_SCATTER - use_sg];
for (segment = 0; segment < use_sg; segment++) {
dma_addr_t baddr = scsi_sg_dma_address(&scatter[segment]);
unsigned int len = scsi_sg_dma_len(&scatter[segment]);
SCATTER_ONE(&data[segment],
baddr,
len);
cp->data_len += len;
}
}
return segment;
}
/*==========================================================
**
**
** Test the pci bus snoop logic :-(
**
** Has to be called with interrupts disabled.
**
**
**==========================================================
*/
#ifndef SCSI_NCR_IOMAPPED
static int __init ncr_regtest (struct ncb* np)
{
register volatile u_int32 data;
/*
** ncr registers may NOT be cached.
** write 0xffffffff to a read only register area,
** and try to read it back.
*/
data = 0xffffffff;
OUTL_OFF(offsetof(struct ncr_reg, nc_dstat), data);
data = INL_OFF(offsetof(struct ncr_reg, nc_dstat));
#if 1
if (data == 0xffffffff) {
#else
if ((data & 0xe2f0fffd) != 0x02000080) {
#endif
printk ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
(unsigned) data);
return (0x10);
};
return (0);
}
#endif
static int __init ncr_snooptest (struct ncb* np)
{
u_int32 ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc;
u_char dstat;
int i, err=0;
#ifndef SCSI_NCR_IOMAPPED
if (np->reg) {
err |= ncr_regtest (np);
if (err) return (err);
}
#endif
restart_test:
/*
** Enable Master Parity Checking as we intend
** to enable it for normal operations.
*/
OUTB (nc_ctest4, (np->rv_ctest4 & MPEE));
/*
** init
*/
pc = NCB_SCRIPTH0_PHYS (np, snooptest);
host_wr = 1;
ncr_wr = 2;
/*
** Set memory and register.
*/
np->ncr_cache = cpu_to_scr(host_wr);
OUTL (nc_temp, ncr_wr);
/*
** Start script (exchange values)
*/
OUTL (nc_dsa, np->p_ncb);
OUTL_DSP (pc);
/*
** Wait 'til done (with timeout)
*/
for (i=0; i<NCR_SNOOP_TIMEOUT; i++)
if (INB(nc_istat) & (INTF|SIP|DIP))
break;
if (i>=NCR_SNOOP_TIMEOUT) {
printk ("CACHE TEST FAILED: timeout.\n");
return (0x20);
};
/*
** Check for fatal DMA errors.
*/
dstat = INB (nc_dstat);
#if 1 /* Band aiding for broken hardwares that fail PCI parity */
if ((dstat & MDPE) && (np->rv_ctest4 & MPEE)) {
printk ("%s: PCI DATA PARITY ERROR DETECTED - "
"DISABLING MASTER DATA PARITY CHECKING.\n",
ncr_name(np));
np->rv_ctest4 &= ~MPEE;
goto restart_test;
}
#endif
if (dstat & (MDPE|BF|IID)) {
printk ("CACHE TEST FAILED: DMA error (dstat=0x%02x).", dstat);
return (0x80);
}
/*
** Save termination position.
*/
pc = INL (nc_dsp);
/*
** Read memory and register.
*/
host_rd = scr_to_cpu(np->ncr_cache);
ncr_rd = INL (nc_scratcha);
ncr_bk = INL (nc_temp);
/*
** Check termination position.
*/
if (pc != NCB_SCRIPTH0_PHYS (np, snoopend)+8) {
printk ("CACHE TEST FAILED: script execution failed.\n");
printk ("start=%08lx, pc=%08lx, end=%08lx\n",
(u_long) NCB_SCRIPTH0_PHYS (np, snooptest), (u_long) pc,
(u_long) NCB_SCRIPTH0_PHYS (np, snoopend) +8);
return (0x40);
};
/*
** Show results.
*/
if (host_wr != ncr_rd) {
printk ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n",
(int) host_wr, (int) ncr_rd);
err |= 1;
};
if (host_rd != ncr_wr) {
printk ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n",
(int) ncr_wr, (int) host_rd);
err |= 2;
};
if (ncr_bk != ncr_wr) {
printk ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n",
(int) ncr_wr, (int) ncr_bk);
err |= 4;
};
return (err);
}
/*==========================================================
**
** Determine the ncr's clock frequency.
** This is essential for the negotiation
** of the synchronous transfer rate.
**
**==========================================================
**
** Note: we have to return the correct value.
** THERE IS NO SAFE DEFAULT VALUE.
**
** Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
** 53C860 and 53C875 rev. 1 support fast20 transfers but
** do not have a clock doubler and so are provided with a
** 80 MHz clock. All other fast20 boards incorporate a doubler
** and so should be delivered with a 40 MHz clock.
** The recent fast40 chips (895/896/895A) and the
** fast80 chip (C1010) use a 40 Mhz base clock
** and provide a clock quadrupler (160 Mhz). The code below
** tries to deal as cleverly as possible with all this stuff.
**
**----------------------------------------------------------
*/
/*
* Select NCR SCSI clock frequency
*/
static void ncr_selectclock(ncb_p np, u_char scntl3)
{
if (np->multiplier < 2) {
OUTB(nc_scntl3, scntl3);
return;
}
if (bootverbose >= 2)
printk ("%s: enabling clock multiplier\n", ncr_name(np));
OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */
if ( (np->device_id != PCI_DEVICE_ID_LSI_53C1010) &&
(np->device_id != PCI_DEVICE_ID_LSI_53C1010_66) &&
(np->multiplier > 2)) {
int i = 20; /* Poll bit 5 of stest4 for quadrupler */
while (!(INB(nc_stest4) & LCKFRQ) && --i > 0)
UDELAY (20);
if (!i)
printk("%s: the chip cannot lock the frequency\n",
ncr_name(np));
} else /* Wait 120 micro-seconds for multiplier*/
UDELAY (120);
OUTB(nc_stest3, HSC); /* Halt the scsi clock */
OUTB(nc_scntl3, scntl3);
OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */
OUTB(nc_stest3, 0x00); /* Restart scsi clock */
}
/*
* calculate NCR SCSI clock frequency (in KHz)
*/
static unsigned __init ncrgetfreq (ncb_p np, int gen)
{
unsigned int ms = 0;
unsigned int f;
int count;
/*
* Measure GEN timer delay in order
* to calculate SCSI clock frequency
*
* This code will never execute too
* many loop iterations (if DELAY is
* reasonably correct). It could get
* too low a delay (too high a freq.)
* if the CPU is slow executing the
* loop for some reason (an NMI, for
* example). For this reason we will
* if multiple measurements are to be
* performed trust the higher delay
* (lower frequency returned).
*/
OUTW (nc_sien , 0x0);/* mask all scsi interrupts */
/* enable general purpose timer */
(void) INW (nc_sist); /* clear pending scsi interrupt */
OUTB (nc_dien , 0); /* mask all dma interrupts */
(void) INW (nc_sist); /* another one, just to be sure :) */
OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */
OUTB (nc_stime1, 0); /* disable general purpose timer */
OUTB (nc_stime1, gen); /* set to nominal delay of 1<<gen * 125us */
/* Temporary fix for udelay issue with Alpha
platform */
while (!(INW(nc_sist) & GEN) && ms++ < 100000) {
/* count 1ms */
for (count = 0; count < 10; count++)
UDELAY (100);
}
OUTB (nc_stime1, 0); /* disable general purpose timer */
/*
* set prescaler to divide by whatever 0 means
* 0 ought to choose divide by 2, but appears
* to set divide by 3.5 mode in my 53c810 ...
*/
OUTB (nc_scntl3, 0);
/*
* adjust for prescaler, and convert into KHz
* scale values derived empirically.
*/
f = ms ? ((1 << gen) * 4340) / ms : 0;
if (bootverbose >= 2)
printk ("%s: Delay (GEN=%d): %u msec, %u KHz\n",
ncr_name(np), gen, ms, f);
return f;
}
static unsigned __init ncr_getfreq (ncb_p np)
{
u_int f1, f2;
int gen = 11;
(void) ncrgetfreq (np, gen); /* throw away first result */
f1 = ncrgetfreq (np, gen);
f2 = ncrgetfreq (np, gen);
if (f1 > f2) f1 = f2; /* trust lower result */
return f1;
}
/*
* Get/probe NCR SCSI clock frequency
*/
static void __init ncr_getclock (ncb_p np, int mult)
{
unsigned char scntl3 = np->sv_scntl3;
unsigned char stest1 = np->sv_stest1;
unsigned f1;
np->multiplier = 1;
f1 = 40000;
/*
** True with 875/895/896/895A with clock multiplier selected
*/
if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
if (bootverbose >= 2)
printk ("%s: clock multiplier found\n", ncr_name(np));
np->multiplier = mult;
}
/*
** If multiplier not found or scntl3 not 7,5,3,
** reset chip and get frequency from general purpose timer.
** Otherwise trust scntl3 BIOS setting.
*/
if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) {
OUTB (nc_stest1, 0); /* make sure doubler is OFF */
f1 = ncr_getfreq (np);
if (bootverbose)
printk ("%s: NCR clock is %uKHz\n", ncr_name(np), f1);
if (f1 < 55000) f1 = 40000;
else f1 = 80000;
/*
** Suggest to also check the PCI clock frequency
** to make sure our frequency calculation algorithm
** is not too biased.
*/
if (np->features & FE_66MHZ) {
np->pciclock_min = (66000*55+80-1)/80;
np->pciclock_max = (66000*55)/40;
}
else {
np->pciclock_min = (33000*55+80-1)/80;
np->pciclock_max = (33000*55)/40;
}
if (f1 == 40000 && mult > 1) {
if (bootverbose >= 2)
printk ("%s: clock multiplier assumed\n", ncr_name(np));
np->multiplier = mult;
}
} else {
if ((scntl3 & 7) == 3) f1 = 40000;
else if ((scntl3 & 7) == 5) f1 = 80000;
else f1 = 160000;
f1 /= np->multiplier;
}
/*
** Compute controller synchronous parameters.
*/
f1 *= np->multiplier;
np->clock_khz = f1;
}
/*
* Get/probe PCI clock frequency
*/
static u_int __init ncr_getpciclock (ncb_p np)
{
static u_int f;
OUTB (nc_stest1, SCLK); /* Use the PCI clock as SCSI clock */
f = ncr_getfreq (np);
OUTB (nc_stest1, 0);
return f;
}
/*===================== LINUX ENTRY POINTS SECTION ==========================*/
#ifndef uchar
#define uchar unsigned char
#endif
#ifndef ushort
#define ushort unsigned short
#endif
#ifndef ulong
#define ulong unsigned long
#endif
/* ---------------------------------------------------------------------
**
** Driver setup from the boot command line
**
** ---------------------------------------------------------------------
*/
#ifdef MODULE
#define ARG_SEP ' '
#else
#define ARG_SEP ','
#endif
#define OPT_TAGS 1
#define OPT_MASTER_PARITY 2
#define OPT_SCSI_PARITY 3
#define OPT_DISCONNECTION 4
#define OPT_SPECIAL_FEATURES 5
#define OPT_RESERVED_1 6
#define OPT_FORCE_SYNC_NEGO 7
#define OPT_REVERSE_PROBE 8
#define OPT_DEFAULT_SYNC 9
#define OPT_VERBOSE 10
#define OPT_DEBUG 11
#define OPT_BURST_MAX 12
#define OPT_LED_PIN 13
#define OPT_MAX_WIDE 14
#define OPT_SETTLE_DELAY 15
#define OPT_DIFF_SUPPORT 16
#define OPT_IRQM 17
#define OPT_PCI_FIX_UP 18
#define OPT_BUS_CHECK 19
#define OPT_OPTIMIZE 20
#define OPT_RECOVERY 21
#define OPT_SAFE_SETUP 22
#define OPT_USE_NVRAM 23
#define OPT_EXCLUDE 24
#define OPT_HOST_ID 25
#ifdef SCSI_NCR_IARB_SUPPORT
#define OPT_IARB 26
#endif
static char setup_token[] __initdata =
"tags:" "mpar:"
"spar:" "disc:"
"specf:" "_rsvd1:"
"fsn:" "revprob:"
"sync:" "verb:"
"debug:" "burst:"
"led:" "wide:"
"settle:" "diff:"
"irqm:" "pcifix:"
"buschk:" "optim:"
"recovery:"
"safe:" "nvram:"
"excl:" "hostid:"
#ifdef SCSI_NCR_IARB_SUPPORT
"iarb:"
#endif
; /* DONNOT REMOVE THIS ';' */
#ifdef MODULE
#define ARG_SEP ' '
#else
#define ARG_SEP ','
#endif
static int __init get_setup_token(char *p)
{
char *cur = setup_token;
char *pc;
int i = 0;
while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
++pc;
++i;
if (!strncmp(p, cur, pc - cur))
return i;
cur = pc;
}
return 0;
}
int __init sym53c8xx_setup(char *str)
{
#ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
char *cur = str;
char *pc, *pv;
unsigned long val;
int i, c;
int xi = 0;
while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
char *pe;
val = 0;
pv = pc;
c = *++pv;
if (c == 'n')
val = 0;
else if (c == 'y')
val = 1;
else
val = (int) simple_strtoul(pv, &pe, 0);
switch (get_setup_token(cur)) {
case OPT_TAGS:
driver_setup.default_tags = val;
if (pe && *pe == '/') {
i = 0;
while (*pe && *pe != ARG_SEP &&
i < sizeof(driver_setup.tag_ctrl)-1) {
driver_setup.tag_ctrl[i++] = *pe++;
}
driver_setup.tag_ctrl[i] = '\0';
}
break;
case OPT_MASTER_PARITY:
driver_setup.master_parity = val;
break;
case OPT_SCSI_PARITY:
driver_setup.scsi_parity = val;
break;
case OPT_DISCONNECTION:
driver_setup.disconnection = val;
break;
case OPT_SPECIAL_FEATURES:
driver_setup.special_features = val;
break;
case OPT_FORCE_SYNC_NEGO:
driver_setup.force_sync_nego = val;
break;
case OPT_REVERSE_PROBE:
driver_setup.reverse_probe = val;
break;
case OPT_DEFAULT_SYNC:
driver_setup.default_sync = val;
break;
case OPT_VERBOSE:
driver_setup.verbose = val;
break;
case OPT_DEBUG:
driver_setup.debug = val;
break;
case OPT_BURST_MAX:
driver_setup.burst_max = val;
break;
case OPT_LED_PIN:
driver_setup.led_pin = val;
break;
case OPT_MAX_WIDE:
driver_setup.max_wide = val? 1:0;
break;
case OPT_SETTLE_DELAY:
driver_setup.settle_delay = val;
break;
case OPT_DIFF_SUPPORT:
driver_setup.diff_support = val;
break;
case OPT_IRQM:
driver_setup.irqm = val;
break;
case OPT_PCI_FIX_UP:
driver_setup.pci_fix_up = val;
break;
case OPT_BUS_CHECK:
driver_setup.bus_check = val;
break;
case OPT_OPTIMIZE:
driver_setup.optimize = val;
break;
case OPT_RECOVERY:
driver_setup.recovery = val;
break;
case OPT_USE_NVRAM:
driver_setup.use_nvram = val;
break;
case OPT_SAFE_SETUP:
memcpy(&driver_setup, &driver_safe_setup,
sizeof(driver_setup));
break;
case OPT_EXCLUDE:
if (xi < SCSI_NCR_MAX_EXCLUDES)
driver_setup.excludes[xi++] = val;
break;
case OPT_HOST_ID:
driver_setup.host_id = val;
break;
#ifdef SCSI_NCR_IARB_SUPPORT
case OPT_IARB:
driver_setup.iarb = val;
break;
#endif
default:
printk("sym53c8xx_setup: unexpected boot option '%.*s' ignored\n", (int)(pc-cur+1), cur);
break;
}
if ((cur = strchr(cur, ARG_SEP)) != NULL)
++cur;
}
#endif /* SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT */
return 1;
}
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,13)
#ifndef MODULE
__setup("sym53c8xx=", sym53c8xx_setup);
#endif
#endif
static int
sym53c8xx_pci_init(Scsi_Host_Template *tpnt, pcidev_t pdev, ncr_device *device);
/*
** Linux entry point for SYM53C8XX devices detection routine.
**
** Called by the middle-level scsi drivers at initialization time,
** or at module installation.
**
** Read the PCI configuration and try to attach each
** detected NCR board.
**
** If NVRAM is present, try to attach boards according to
** the used defined boot order.
**
** Returns the number of boards successfully attached.
*/
static void __init ncr_print_driver_setup(void)
{
#define YesNo(y) y ? 'y' : 'n'
printk (NAME53C8XX ": setup=disc:%c,specf:%d,tags:%d,sync:%d,"
"burst:%d,wide:%c,diff:%d,revprob:%c,buschk:0x%x\n",
YesNo(driver_setup.disconnection),
driver_setup.special_features,
driver_setup.default_tags,
driver_setup.default_sync,
driver_setup.burst_max,
YesNo(driver_setup.max_wide),
driver_setup.diff_support,
YesNo(driver_setup.reverse_probe),
driver_setup.bus_check);
printk (NAME53C8XX ": setup=mpar:%c,spar:%c,fsn=%c,verb:%d,debug:0x%x,"
"led:%c,settle:%d,irqm:0x%x,nvram:0x%x,pcifix:0x%x\n",
YesNo(driver_setup.master_parity),
YesNo(driver_setup.scsi_parity),
YesNo(driver_setup.force_sync_nego),
driver_setup.verbose,
driver_setup.debug,
YesNo(driver_setup.led_pin),
driver_setup.settle_delay,
driver_setup.irqm,
driver_setup.use_nvram,
driver_setup.pci_fix_up);
#undef YesNo
}
/*===================================================================
** SYM53C8XX devices description table and chip ids list.
**===================================================================
*/
static ncr_chip ncr_chip_table[] __initdata = SCSI_NCR_CHIP_TABLE;
static ushort ncr_chip_ids[] __initdata = SCSI_NCR_CHIP_IDS;
#ifdef SCSI_NCR_PQS_PDS_SUPPORT
/*===================================================================
** Detect all NCR PQS/PDS boards and keep track of their bus nr.
**
** The NCR PQS or PDS card is constructed as a DEC bridge
** behind which sit a proprietary NCR memory controller and
** four or two 53c875s as separate devices. In its usual mode
** of operation, the 875s are slaved to the memory controller
** for all transfers. We can tell if an 875 is part of a
** PQS/PDS or not since if it is, it will be on the same bus
** as the memory controller. To operate with the Linux
** driver, the memory controller is disabled and the 875s
** freed to function independently. The only wrinkle is that
** the preset SCSI ID (which may be zero) must be read in from
** a special configuration space register of the 875
**===================================================================
*/
#define SCSI_NCR_MAX_PQS_BUS 16
static int pqs_bus[SCSI_NCR_MAX_PQS_BUS] __initdata = { 0 };
static void __init ncr_detect_pqs_pds(void)
{
short index;
pcidev_t dev = PCIDEV_NULL;
for(index=0; index < SCSI_NCR_MAX_PQS_BUS; index++) {
u_char tmp;
dev = pci_find_device(0x101a, 0x0009, dev);
if (dev == PCIDEV_NULL) {
pqs_bus[index] = -1;
break;
}
printk(KERN_INFO NAME53C8XX ": NCR PQS/PDS memory controller detected on bus %d\n", PciBusNumber(dev));
pci_read_config_byte(dev, 0x44, &tmp);
/* bit 1: allow individual 875 configuration */
tmp |= 0x2;
pci_write_config_byte(dev, 0x44, tmp);
pci_read_config_byte(dev, 0x45, &tmp);
/* bit 2: drive individual 875 interrupts to the bus */
tmp |= 0x4;
pci_write_config_byte(dev, 0x45, tmp);
pqs_bus[index] = PciBusNumber(dev);
}
}
#endif /* SCSI_NCR_PQS_PDS_SUPPORT */
/*===================================================================
** Detect all 53c8xx hosts and then attach them.
**
** If we are using NVRAM, once all hosts are detected, we need to
** check any NVRAM for boot order in case detect and boot order
** differ and attach them using the order in the NVRAM.
**
** If no NVRAM is found or data appears invalid attach boards in
** the order they are detected.
**===================================================================
*/
int __init sym53c8xx_detect(Scsi_Host_Template *tpnt)
{
pcidev_t pcidev;
int i, j, chips, hosts, count;
int attach_count = 0;
ncr_device *devtbl, *devp;
#ifdef SCSI_NCR_NVRAM_SUPPORT
ncr_nvram nvram0, nvram, *nvp;
#endif
/*
** PCI is required.
*/
if (!pci_present())
return 0;
/*
** Initialize driver general stuff.
*/
#ifdef SCSI_NCR_PROC_INFO_SUPPORT
#if LINUX_VERSION_CODE < LinuxVersionCode(2,3,27)
tpnt->proc_dir = &proc_scsi_sym53c8xx;
#else
tpnt->proc_name = NAME53C8XX;
#endif
tpnt->proc_info = sym53c8xx_proc_info;
#endif
#if defined(SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT) && defined(MODULE)
if (sym53c8xx)
sym53c8xx_setup(sym53c8xx);
#endif
#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
ncr_debug = driver_setup.debug;
#endif
if (initverbose >= 2)
ncr_print_driver_setup();
/*
** Allocate the device table since we donnot want to
** overflow the kernel stack.
** 1 x 4K PAGE is enough for more than 40 devices for i386.
*/
devtbl = m_calloc(PAGE_SIZE, "devtbl");
if (!devtbl)
return 0;
/*
** Detect all NCR PQS/PDS memory controllers.
*/
#ifdef SCSI_NCR_PQS_PDS_SUPPORT
ncr_detect_pqs_pds();
#endif
/*
** Detect all 53c8xx hosts.
** Save the first Symbios NVRAM content if any
** for the boot order.
*/
chips = sizeof(ncr_chip_ids) / sizeof(ncr_chip_ids[0]);
hosts = PAGE_SIZE / sizeof(*devtbl);
#ifdef SCSI_NCR_NVRAM_SUPPORT
nvp = (driver_setup.use_nvram & 0x1) ? &nvram0 : 0;
#endif
j = 0;
count = 0;
pcidev = PCIDEV_NULL;
while (1) {
char *msg = "";
if (count >= hosts)
break;
if (j >= chips)
break;
i = driver_setup.reverse_probe ? chips - 1 - j : j;
pcidev = pci_find_device(PCI_VENDOR_ID_NCR, ncr_chip_ids[i],
pcidev);
if (pcidev == PCIDEV_NULL) {
++j;
continue;
}
if (pci_enable_device(pcidev)) /* @!*!$&*!%-*#;! */
continue;
/* Some HW as the HP LH4 may report twice PCI devices */
for (i = 0; i < count ; i++) {
if (devtbl[i].slot.bus == PciBusNumber(pcidev) &&
devtbl[i].slot.device_fn == PciDeviceFn(pcidev))
break;
}
if (i != count) /* Ignore this device if we already have it */
continue;
pci_set_master(pcidev);
devp = &devtbl[count];
devp->host_id = driver_setup.host_id;
devp->attach_done = 0;
if (sym53c8xx_pci_init(tpnt, pcidev, devp)) {
continue;
}
++count;
#ifdef SCSI_NCR_NVRAM_SUPPORT
if (nvp) {
ncr_get_nvram(devp, nvp);
switch(nvp->type) {
case SCSI_NCR_SYMBIOS_NVRAM:
/*
* Switch to the other nvram buffer, so that
* nvram0 will contain the first Symbios
* format NVRAM content with boot order.
*/
nvp = &nvram;
msg = "with Symbios NVRAM";
break;
case SCSI_NCR_TEKRAM_NVRAM:
msg = "with Tekram NVRAM";
break;
}
}
#endif
#ifdef SCSI_NCR_PQS_PDS_SUPPORT
if (devp->pqs_pds)
msg = "(NCR PQS/PDS)";
#endif
printk(KERN_INFO NAME53C8XX ": 53c%s detected %s\n",
devp->chip.name, msg);
}
/*
** If we have found a SYMBIOS NVRAM, use first the NVRAM boot
** sequence as device boot order.
** check devices in the boot record against devices detected.
** attach devices if we find a match. boot table records that
** do not match any detected devices will be ignored.
** devices that do not match any boot table will not be attached
** here but will attempt to be attached during the device table
** rescan.
*/
#ifdef SCSI_NCR_NVRAM_SUPPORT
if (!nvp || nvram0.type != SCSI_NCR_SYMBIOS_NVRAM)
goto next;
for (i = 0; i < 4; i++) {
Symbios_host *h = &nvram0.data.Symbios.host[i];
for (j = 0 ; j < count ; j++) {
devp = &devtbl[j];
if (h->device_fn != devp->slot.device_fn ||
h->bus_nr != devp->slot.bus ||
h->device_id != devp->chip.device_id)
continue;
if (devp->attach_done)
continue;
if (h->flags & SYMBIOS_INIT_SCAN_AT_BOOT) {
ncr_get_nvram(devp, nvp);
if (!ncr_attach (tpnt, attach_count, devp))
attach_count++;
}
else if (!(driver_setup.use_nvram & 0x80))
printk(KERN_INFO NAME53C8XX
": 53c%s state OFF thus not attached\n",
devp->chip.name);
else
continue;
devp->attach_done = 1;
break;
}
}
next:
#endif
/*
** Rescan device list to make sure all boards attached.
** Devices without boot records will not be attached yet
** so try to attach them here.
*/
for (i= 0; i < count; i++) {
devp = &devtbl[i];
if (!devp->attach_done) {
#ifdef SCSI_NCR_NVRAM_SUPPORT
ncr_get_nvram(devp, nvp);
#endif
if (!ncr_attach (tpnt, attach_count, devp))
attach_count++;
}
}
m_free(devtbl, PAGE_SIZE, "devtbl");
return attach_count;
}
/*===================================================================
** Read and check the PCI configuration for any detected NCR
** boards and save data for attaching after all boards have
** been detected.
**===================================================================
*/
static int __init
sym53c8xx_pci_init(Scsi_Host_Template *tpnt, pcidev_t pdev, ncr_device *device)
{
u_short vendor_id, device_id, command, status_reg;
u_char cache_line_size, latency_timer;
u_char suggested_cache_line_size = 0;
u_char pci_fix_up = driver_setup.pci_fix_up;
u_char revision;
u_int irq;
u_long base, base_c, base_2, base_2_c, io_port;
int i;
ncr_chip *chip;
printk(KERN_INFO NAME53C8XX ": at PCI bus %d, device %d, function %d\n",
PciBusNumber(pdev),
(int) (PciDeviceFn(pdev) & 0xf8) >> 3,
(int) (PciDeviceFn(pdev) & 7));
/*
** Read info from the PCI config space.
** pci_read_config_xxx() functions are assumed to be used for
** successfully detected PCI devices.
*/
vendor_id = PciVendorId(pdev);
device_id = PciDeviceId(pdev);
irq = PciIrqLine(pdev);
i = pci_get_base_address(pdev, 0, &io_port);
io_port = pci_get_base_cookie(pdev, 0);
base_c = pci_get_base_cookie(pdev, i);
i = pci_get_base_address(pdev, i, &base);
base_2_c = pci_get_base_cookie(pdev, i);
(void) pci_get_base_address(pdev, i, &base_2);
pci_read_config_word(pdev, PCI_COMMAND, &command);
pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_timer);
pci_read_config_word(pdev, PCI_STATUS, &status_reg);
#ifdef SCSI_NCR_PQS_PDS_SUPPORT
/*
** Match the BUS number for PQS/PDS devices.
** Read the SCSI ID from a special register mapped
** into the configuration space of the individual
** 875s. This register is set up by the PQS bios
*/
for(i = 0; i < SCSI_NCR_MAX_PQS_BUS && pqs_bus[i] != -1; i++) {
u_char tmp;
if (pqs_bus[i] == PciBusNumber(pdev)) {
pci_read_config_byte(pdev, 0x84, &tmp);
device->pqs_pds = 1;
device->host_id = tmp;
break;
}
}
#endif /* SCSI_NCR_PQS_PDS_SUPPORT */
/*
** If user excludes this chip, donnot initialize it.
*/
for (i = 0 ; i < SCSI_NCR_MAX_EXCLUDES ; i++) {
if (driver_setup.excludes[i] ==
(io_port & PCI_BASE_ADDRESS_IO_MASK))
return -1;
}
/*
** Check if the chip is supported
*/
chip = 0;
for (i = 0; i < sizeof(ncr_chip_table)/sizeof(ncr_chip_table[0]); i++) {
if (device_id != ncr_chip_table[i].device_id)
continue;
if (revision > ncr_chip_table[i].revision_id)
continue;
if (!(ncr_chip_table[i].features & FE_LDSTR))
break;
chip = &device->chip;
memcpy(chip, &ncr_chip_table[i], sizeof(*chip));
chip->revision_id = revision;
break;
}
#ifdef SCSI_NCR_DYNAMIC_DMA_MAPPING
/* Configure DMA attributes. For DAC capable boards, we can encode
** 32+8 bits for SCSI DMA data addresses with the extra bits used
** in the size field. We use normal 32-bit PCI addresses for
** descriptors.
*/
if (chip && (chip->features & FE_DAC)) {
if (pci_set_dma_mask(pdev, (u64) 0xffffffffff))
chip->features &= ~FE_DAC_IN_USE;
else
chip->features |= FE_DAC_IN_USE;
}
if (chip && !(chip->features & FE_DAC_IN_USE)) {
if (pci_set_dma_mask(pdev, (u64) 0xffffffff)) {
printk(KERN_WARNING NAME53C8XX
"32 BIT PCI BUS DMA ADDRESSING NOT SUPPORTED\n");
return -1;
}
}
#endif
/*
** Ignore Symbios chips controlled by SISL RAID controller.
** This controller sets value 0x52414944 at RAM end - 16.
*/
#if defined(__i386__) && !defined(SCSI_NCR_PCI_MEM_NOT_SUPPORTED)
if (chip && (base_2_c & PCI_BASE_ADDRESS_MEM_MASK)) {
unsigned int ram_size, ram_val;
u_long ram_ptr;
if (chip->features & FE_RAM8K)
ram_size = 8192;
else
ram_size = 4096;
ram_ptr = remap_pci_mem(base_2_c & PCI_BASE_ADDRESS_MEM_MASK,
ram_size);
if (ram_ptr) {
ram_val = readl_raw(ram_ptr + ram_size - 16);
unmap_pci_mem(ram_ptr, ram_size);
if (ram_val == 0x52414944) {
printk(NAME53C8XX": not initializing, "
"driven by SISL RAID controller.\n");
return -1;
}
}
}
#endif /* i386 and PCI MEMORY accessible */
if (!chip) {
printk(NAME53C8XX ": not initializing, device not supported\n");
return -1;
}
#if defined(__powerpc__) || defined(__hppa__)
/*
** Fix-up for power/pc and hppa.
** Should not be performed by the driver.
*/
if ((command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY))
!= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
printk(NAME53C8XX ": setting%s%s...\n",
(command & PCI_COMMAND_IO) ? "" : " PCI_COMMAND_IO",
(command & PCI_COMMAND_MEMORY) ? "" : " PCI_COMMAND_MEMORY");
command |= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
pci_write_config_word(pdev, PCI_COMMAND, command);
}
#if LINUX_VERSION_CODE < LinuxVersionCode(2,2,0)
if ( is_prep ) {
if (io_port >= 0x10000000) {
printk(NAME53C8XX ": reallocating io_port (Wacky IBM)");
io_port = (io_port & 0x00FFFFFF) | 0x01000000;
pci_write_config_dword(pdev,
PCI_BASE_ADDRESS_0, io_port);
}
if (base >= 0x10000000) {
printk(NAME53C8XX ": reallocating base (Wacky IBM)");
base = (base & 0x00FFFFFF) | 0x01000000;
pci_write_config_dword(pdev,
PCI_BASE_ADDRESS_1, base);
}
if (base_2 >= 0x10000000) {
printk(NAME53C8XX ": reallocating base2 (Wacky IBM)");
base_2 = (base_2 & 0x00FFFFFF) | 0x01000000;
pci_write_config_dword(pdev,
PCI_BASE_ADDRESS_2, base_2);
}
}
#endif
#endif /* __powerpc__ */
#if defined(__i386__) && !defined(MODULE)
if (!cache_line_size) {
#if LINUX_VERSION_CODE < LinuxVersionCode(2,1,75)
extern char x86;
switch(x86) {
#else
switch(boot_cpu_data.x86) {
#endif
case 4: suggested_cache_line_size = 4; break;
case 6:
case 5: suggested_cache_line_size = 8; break;
}
}
#endif /* __i386__ */
/*
** Check availability of IO space, memory space.
** Enable master capability if not yet.
**
** We shouldn't have to care about the IO region when
** we are using MMIO. But calling check_region() from
** both the ncr53c8xx and the sym53c8xx drivers prevents
** from attaching devices from the both drivers.
** If you have a better idea, let me know.
*/
/* #ifdef SCSI_NCR_IOMAPPED */
#if 1
if (!(command & PCI_COMMAND_IO)) {
printk(NAME53C8XX ": I/O base address (0x%lx) disabled.\n",
(long) io_port);
io_port = 0;
}
#endif
if (!(command & PCI_COMMAND_MEMORY)) {
printk(NAME53C8XX ": PCI_COMMAND_MEMORY not set.\n");
base = 0;
base_2 = 0;
}
io_port &= PCI_BASE_ADDRESS_IO_MASK;
base &= PCI_BASE_ADDRESS_MEM_MASK;
base_2 &= PCI_BASE_ADDRESS_MEM_MASK;
/* #ifdef SCSI_NCR_IOMAPPED */
#if 1
if (io_port && check_region (io_port, 128)) {
printk(NAME53C8XX ": IO region 0x%lx[0..127] is in use\n",
(long) io_port);
io_port = 0;
}
if (!io_port)
return -1;
#endif
#ifndef SCSI_NCR_IOMAPPED
if (!base) {
printk(NAME53C8XX ": MMIO base address disabled.\n");
return -1;
}
#endif
/*
** Set MASTER capable and PARITY bit, if not yet.
*/
if ((command & (PCI_COMMAND_MASTER | PCI_COMMAND_PARITY))
!= (PCI_COMMAND_MASTER | PCI_COMMAND_PARITY)) {
printk(NAME53C8XX ": setting%s%s...(fix-up)\n",
(command & PCI_COMMAND_MASTER) ? "" : " PCI_COMMAND_MASTER",
(command & PCI_COMMAND_PARITY) ? "" : " PCI_COMMAND_PARITY");
command |= (PCI_COMMAND_MASTER | PCI_COMMAND_PARITY);
pci_write_config_word(pdev, PCI_COMMAND, command);
}
/*
** Fix some features according to driver setup.
*/
if (!(driver_setup.special_features & 1))
chip->features &= ~FE_SPECIAL_SET;
else {
if (driver_setup.special_features & 2)
chip->features &= ~FE_WRIE;
if (driver_setup.special_features & 4)
chip->features &= ~FE_NOPM;
}
/*
** Work around for errant bit in 895A. The 66Mhz
** capable bit is set erroneously. Clear this bit.
** (Item 1 DEL 533)
**
** Make sure Config space and Features agree.
**
** Recall: writes are not normal to status register -
** write a 1 to clear and a 0 to leave unchanged.
** Can only reset bits.
*/
if (chip->features & FE_66MHZ) {
if (!(status_reg & PCI_STATUS_66MHZ))
chip->features &= ~FE_66MHZ;
}
else {
if (status_reg & PCI_STATUS_66MHZ) {
status_reg = PCI_STATUS_66MHZ;
pci_write_config_word(pdev, PCI_STATUS, status_reg);
pci_read_config_word(pdev, PCI_STATUS, &status_reg);
}
}
/*
** Some features are required to be enabled in order to
** work around some chip problems. :) ;)
** (ITEM 12 of a DEL about the 896 I haven't yet).
** We must ensure the chip will use WRITE AND INVALIDATE.
** The revision number limit is for now arbitrary.
*/
if (device_id == PCI_DEVICE_ID_NCR_53C896 && revision <= 0x10) {
chip->features |= (FE_WRIE | FE_CLSE);
pci_fix_up |= 3; /* Force appropriate PCI fix-up */
}
#ifdef SCSI_NCR_PCI_FIX_UP_SUPPORT
/*
** Try to fix up PCI config according to wished features.
*/
if ((pci_fix_up & 1) && (chip->features & FE_CLSE) &&
!cache_line_size && suggested_cache_line_size) {
cache_line_size = suggested_cache_line_size;
pci_write_config_byte(pdev,
PCI_CACHE_LINE_SIZE, cache_line_size);
printk(NAME53C8XX ": PCI_CACHE_LINE_SIZE set to %d (fix-up).\n",
cache_line_size);
}
if ((pci_fix_up & 2) && cache_line_size &&
(chip->features & FE_WRIE) && !(command & PCI_COMMAND_INVALIDATE)) {
printk(NAME53C8XX": setting PCI_COMMAND_INVALIDATE (fix-up)\n");
command |= PCI_COMMAND_INVALIDATE;
pci_write_config_word(pdev, PCI_COMMAND, command);
}
/*
** Tune PCI LATENCY TIMER according to burst max length transfer.
** (latency timer >= burst length + 6, we add 10 to be quite sure)
*/
if (chip->burst_max && (latency_timer == 0 || (pci_fix_up & 4))) {
uchar lt = (1 << chip->burst_max) + 6 + 10;
if (latency_timer < lt) {
printk(NAME53C8XX
": changing PCI_LATENCY_TIMER from %d to %d.\n",
(int) latency_timer, (int) lt);
latency_timer = lt;
pci_write_config_byte(pdev,
PCI_LATENCY_TIMER, latency_timer);
}
}
#endif /* SCSI_NCR_PCI_FIX_UP_SUPPORT */
/*
** Initialise ncr_device structure with items required by ncr_attach.
*/
device->pdev = pdev;
device->slot.bus = PciBusNumber(pdev);
device->slot.device_fn = PciDeviceFn(pdev);
device->slot.base = base;
device->slot.base_2 = base_2;
device->slot.base_c = base_c;
device->slot.base_2_c = base_2_c;
device->slot.io_port = io_port;
device->slot.irq = irq;
device->attach_done = 0;
return 0;
}
/*===================================================================
** Detect and try to read SYMBIOS and TEKRAM NVRAM.
**
** Data can be used to order booting of boards.
**
** Data is saved in ncr_device structure if NVRAM found. This
** is then used to find drive boot order for ncr_attach().
**
** NVRAM data is passed to Scsi_Host_Template later during
** ncr_attach() for any device set up.
*===================================================================
*/
#ifdef SCSI_NCR_NVRAM_SUPPORT
static void __init ncr_get_nvram(ncr_device *devp, ncr_nvram *nvp)
{
devp->nvram = nvp;
if (!nvp)
return;
/*
** Get access to chip IO registers
*/
#ifdef SCSI_NCR_IOMAPPED
request_region(devp->slot.io_port, 128, NAME53C8XX);
devp->slot.base_io = devp->slot.io_port;
#else
devp->slot.reg =
(struct ncr_reg *) remap_pci_mem(devp->slot.base_c, 128);
if (!devp->slot.reg)
return;
#endif
/*
** Try to read SYMBIOS nvram.
** Try to read TEKRAM nvram if Symbios nvram not found.
*/
if (!sym_read_Symbios_nvram(&devp->slot, &nvp->data.Symbios))
nvp->type = SCSI_NCR_SYMBIOS_NVRAM;
else if (!sym_read_Tekram_nvram(&devp->slot, devp->chip.device_id,
&nvp->data.Tekram))
nvp->type = SCSI_NCR_TEKRAM_NVRAM;
else {
nvp->type = 0;
devp->nvram = 0;
}
/*
** Release access to chip IO registers
*/
#ifdef SCSI_NCR_IOMAPPED
release_region(devp->slot.base_io, 128);
#else
unmap_pci_mem((u_long) devp->slot.reg, 128ul);
#endif
}
#endif /* SCSI_NCR_NVRAM_SUPPORT */
/*
** Linux select queue depths function
*/
#define DEF_DEPTH (driver_setup.default_tags)
#define ALL_TARGETS -2
#define NO_TARGET -1
#define ALL_LUNS -2
#define NO_LUN -1
static int device_queue_depth(ncb_p np, int target, int lun)
{
int c, h, t, u, v;
char *p = driver_setup.tag_ctrl;
char *ep;
h = -1;
t = NO_TARGET;
u = NO_LUN;
while ((c = *p++) != 0) {
v = simple_strtoul(p, &ep, 0);
switch(c) {
case '/':
++h;
t = ALL_TARGETS;
u = ALL_LUNS;
break;
case 't':
if (t != target)
t = (target == v) ? v : NO_TARGET;
u = ALL_LUNS;
break;
case 'u':
if (u != lun)
u = (lun == v) ? v : NO_LUN;
break;
case 'q':
if (h == np->unit &&
(t == ALL_TARGETS || t == target) &&
(u == ALL_LUNS || u == lun))
return v;
break;
case '-':
t = ALL_TARGETS;
u = ALL_LUNS;
break;
default:
break;
}
p = ep;
}
return DEF_DEPTH;
}
int sym53c8xx_slave_configure(Scsi_Device *device)
{
struct Scsi_Host *host = device->host;
ncb_p np;
tcb_p tp;
lcb_p lp;
int numtags, depth_to_use;
np = ((struct host_data *) host->hostdata)->ncb;
tp = &np->target[device->id];
lp = ncr_lp(np, tp, device->lun);
/*
** Select queue depth from driver setup.
** Donnot use more than configured by user.
** Use at least 2.
** Donnot use more than our maximum.
*/
numtags = device_queue_depth(np, device->id, device->lun);
if (numtags > tp->usrtags)
numtags = tp->usrtags;
if (!device->tagged_supported)
numtags = 1;
depth_to_use = numtags;
if (depth_to_use < 2)
depth_to_use = 2;
if (depth_to_use > MAX_TAGS)
depth_to_use = MAX_TAGS;
scsi_adjust_queue_depth(device,
(device->tagged_supported ?
MSG_SIMPLE_TAG : 0),
depth_to_use);
/*
** Since the queue depth is not tunable under Linux,
** we need to know this value in order not to
** announce stupid things to user.
*/
if (lp) {
lp->numtags = lp->maxtags = numtags;
lp->scdev_depth = depth_to_use;
}
ncr_setup_tags (np, device->id, device->lun);
#ifdef DEBUG_SYM53C8XX
printk("sym53c8xx_select_queue_depth: host=%d, id=%d, lun=%d, depth=%d\n",
np->unit, device->id, device->lun, depth_to_use);
#endif
return 0;
}
/*
** Linux entry point for info() function
*/
const char *sym53c8xx_info (struct Scsi_Host *host)
{
return SCSI_NCR_DRIVER_NAME;
}
/*
** Linux entry point of queuecommand() function
*/
int sym53c8xx_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *))
{
ncb_p np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
unsigned long flags;
int sts;
#ifdef DEBUG_SYM53C8XX
printk("sym53c8xx_queue_command\n");
#endif
cmd->scsi_done = done;
cmd->host_scribble = NULL;
cmd->SCp.ptr = NULL;
cmd->SCp.buffer = NULL;
#ifdef SCSI_NCR_DYNAMIC_DMA_MAPPING
__data_mapped(cmd) = 0;
__data_mapping(cmd) = 0;
#endif
NCR_LOCK_NCB(np, flags);
if ((sts = ncr_queue_command(np, cmd)) != DID_OK) {
SetScsiResult(cmd, sts, 0);
#ifdef DEBUG_SYM53C8XX
printk("sym53c8xx : command not queued - result=%d\n", sts);
#endif
}
#ifdef DEBUG_SYM53C8XX
else
printk("sym53c8xx : command successfully queued\n");
#endif
NCR_UNLOCK_NCB(np, flags);
if (sts != DID_OK) {
unmap_scsi_data(np, cmd);
done(cmd);
}
return sts;
}
/*
** Linux entry point of the interrupt handler.
** Since linux versions > 1.3.70, we trust the kernel for
** passing the internal host descriptor as 'dev_id'.
** Otherwise, we scan the host list and call the interrupt
** routine for each host that uses this IRQ.
*/
static void sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
{
unsigned long flags;
ncb_p np = (ncb_p) dev_id;
Scsi_Cmnd *done_list;
#ifdef DEBUG_SYM53C8XX
printk("sym53c8xx : interrupt received\n");
#endif
if (DEBUG_FLAGS & DEBUG_TINY) printk ("[");
NCR_LOCK_NCB(np, flags);
ncr_exception(np);
done_list = np->done_list;
np->done_list = 0;
NCR_UNLOCK_NCB(np, flags);
if (DEBUG_FLAGS & DEBUG_TINY) printk ("]\n");
if (done_list) {
NCR_LOCK_SCSI_DONE(done_list->device->host, flags);
ncr_flush_done_cmds(done_list);
NCR_UNLOCK_SCSI_DONE(done_list->device->host, flags);
}
}
/*
** Linux entry point of the timer handler
*/
static void sym53c8xx_timeout(unsigned long npref)
{
ncb_p np = (ncb_p) npref;
unsigned long flags;
Scsi_Cmnd *done_list;
NCR_LOCK_NCB(np, flags);
ncr_timeout((ncb_p) np);
done_list = np->done_list;
np->done_list = 0;
NCR_UNLOCK_NCB(np, flags);
if (done_list) {
NCR_LOCK_SCSI_DONE(done_list->device->host, flags);
ncr_flush_done_cmds(done_list);
NCR_UNLOCK_SCSI_DONE(done_list->device->host, flags);
}
}
/*
** Linux entry point of reset() function
*/
#if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
int sym53c8xx_reset(Scsi_Cmnd *cmd, unsigned int reset_flags)
#else
int sym53c8xx_reset(Scsi_Cmnd *cmd)
#endif
{
ncb_p np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
int sts;
unsigned long flags;
Scsi_Cmnd *done_list;
#if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
printk("sym53c8xx_reset: pid=%lu reset_flags=%x serial_number=%ld serial_number_at_timeout=%ld\n",
cmd->pid, reset_flags, cmd->serial_number, cmd->serial_number_at_timeout);
#else
printk("sym53c8xx_reset: command pid %lu\n", cmd->pid);
#endif
NCR_LOCK_NCB(np, flags);
/*
* We have to just ignore reset requests in some situations.
*/
#if defined SCSI_RESET_NOT_RUNNING
if (cmd->serial_number != cmd->serial_number_at_timeout) {
sts = SCSI_RESET_NOT_RUNNING;
goto out;
}
#endif
/*
* If the mid-level driver told us reset is synchronous, it seems
* that we must call the done() callback for the involved command,
* even if this command was not queued to the low-level driver,
* before returning SCSI_RESET_SUCCESS.
*/
#if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
sts = ncr_reset_bus(np, cmd,
(reset_flags & (SCSI_RESET_SYNCHRONOUS | SCSI_RESET_ASYNCHRONOUS)) == SCSI_RESET_SYNCHRONOUS);
#else
sts = ncr_reset_bus(np, cmd, 0);
#endif
/*
* Since we always reset the controller, when we return success,
* we add this information to the return code.
*/
#if defined SCSI_RESET_HOST_RESET
if (sts == SCSI_RESET_SUCCESS)
sts |= SCSI_RESET_HOST_RESET;
#endif
out:
done_list = np->done_list;
np->done_list = 0;
NCR_UNLOCK_NCB(np, flags);
ncr_flush_done_cmds(done_list);
return sts;
}
/*
** Linux entry point of abort() function
*/
int sym53c8xx_abort(Scsi_Cmnd *cmd)
{
ncb_p np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
int sts;
unsigned long flags;
Scsi_Cmnd *done_list;
#if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
printk("sym53c8xx_abort: pid=%lu serial_number=%ld serial_number_at_timeout=%ld\n",
cmd->pid, cmd->serial_number, cmd->serial_number_at_timeout);
#else
printk("sym53c8xx_abort: command pid %lu\n", cmd->pid);
#endif
NCR_LOCK_NCB(np, flags);
#if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
/*
* We have to just ignore abort requests in some situations.
*/
if (cmd->serial_number != cmd->serial_number_at_timeout) {
sts = SCSI_ABORT_NOT_RUNNING;
goto out;
}
#endif
sts = ncr_abort_command(np, cmd);
out:
done_list = np->done_list;
np->done_list = 0;
NCR_UNLOCK_NCB(np, flags);
ncr_flush_done_cmds(done_list);
return sts;
}
int sym53c8xx_release(struct Scsi_Host *host)
{
#ifdef DEBUG_SYM53C8XX
printk("sym53c8xx : release\n");
#endif
ncr_detach(((struct host_data *) host->hostdata)->ncb);
return 1;
}
/*
** Scsi command waiting list management.
**
** It may happen that we cannot insert a scsi command into the start queue,
** in the following circumstances.
** Too few preallocated ccb(s),
** maxtags < cmd_per_lun of the Linux host control block,
** etc...
** Such scsi commands are inserted into a waiting list.
** When a scsi command complete, we try to requeue the commands of the
** waiting list.
*/
#define next_wcmd host_scribble
static void insert_into_waiting_list(ncb_p np, Scsi_Cmnd *cmd)
{
Scsi_Cmnd *wcmd;
#ifdef DEBUG_WAITING_LIST
printk("%s: cmd %lx inserted into waiting list\n", ncr_name(np), (u_long) cmd);
#endif
cmd->next_wcmd = 0;
if (!(wcmd = np->waiting_list)) np->waiting_list = cmd;
else {
while ((wcmd->next_wcmd) != 0)
wcmd = (Scsi_Cmnd *) wcmd->next_wcmd;
wcmd->next_wcmd = (char *) cmd;
}
}
static Scsi_Cmnd *retrieve_from_waiting_list(int to_remove, ncb_p np, Scsi_Cmnd *cmd)
{
Scsi_Cmnd **pcmd = &np->waiting_list;
while (*pcmd) {
if (cmd == *pcmd) {
if (to_remove) {
*pcmd = (Scsi_Cmnd *) cmd->next_wcmd;
cmd->next_wcmd = 0;
}
#ifdef DEBUG_WAITING_LIST
printk("%s: cmd %lx retrieved from waiting list\n", ncr_name(np), (u_long) cmd);
#endif
return cmd;
}
pcmd = (Scsi_Cmnd **) &(*pcmd)->next_wcmd;
}
return 0;
}
static void process_waiting_list(ncb_p np, int sts)
{
Scsi_Cmnd *waiting_list, *wcmd;
waiting_list = np->waiting_list;
np->waiting_list = 0;
#ifdef DEBUG_WAITING_LIST
if (waiting_list) printk("%s: waiting_list=%lx processing sts=%d\n", ncr_name(np), (u_long) waiting_list, sts);
#endif
while ((wcmd = waiting_list) != 0) {
waiting_list = (Scsi_Cmnd *) wcmd->next_wcmd;
wcmd->next_wcmd = 0;
if (sts == DID_OK) {
#ifdef DEBUG_WAITING_LIST
printk("%s: cmd %lx trying to requeue\n", ncr_name(np), (u_long) wcmd);
#endif
sts = ncr_queue_command(np, wcmd);
}
if (sts != DID_OK) {
#ifdef DEBUG_WAITING_LIST
printk("%s: cmd %lx done forced sts=%d\n", ncr_name(np), (u_long) wcmd, sts);
#endif
SetScsiResult(wcmd, sts, 0);
ncr_queue_done_cmd(np, wcmd);
}
}
}
#undef next_wcmd
#ifdef SCSI_NCR_PROC_INFO_SUPPORT
/*=========================================================================
** Proc file system stuff
**
** A read operation returns adapter information.
** A write operation is a control command.
** The string is parsed in the driver code and the command is passed
** to the ncr_usercmd() function.
**=========================================================================
*/
#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
#define is_digit(c) ((c) >= '0' && (c) <= '9')
#define digit_to_bin(c) ((c) - '0')
#define is_space(c) ((c) == ' ' || (c) == '\t')
static int skip_spaces(char *ptr, int len)
{
int cnt, c;
for (cnt = len; cnt > 0 && (c = *ptr++) && is_space(c); cnt--);
return (len - cnt);
}
static int get_int_arg(char *ptr, int len, u_long *pv)
{
int cnt, c;
u_long v;
for (v = 0, cnt = len; cnt > 0 && (c = *ptr++) && is_digit(c); cnt--) {
v = (v * 10) + digit_to_bin(c);
}
if (pv)
*pv = v;
return (len - cnt);
}
static int is_keyword(char *ptr, int len, char *verb)
{
int verb_len = strlen(verb);
if (len >= strlen(verb) && !memcmp(verb, ptr, verb_len))
return verb_len;
else
return 0;
}
#define SKIP_SPACES(min_spaces) \
if ((arg_len = skip_spaces(ptr, len)) < (min_spaces)) \
return -EINVAL; \
ptr += arg_len; len -= arg_len;
#define GET_INT_ARG(v) \
if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
return -EINVAL; \
ptr += arg_len; len -= arg_len;
/*
** Parse a control command
*/
static int ncr_user_command(ncb_p np, char *buffer, int length)
{
char *ptr = buffer;
int len = length;
struct usrcmd *uc = &np->user;
int arg_len;
u_long target;
bzero(uc, sizeof(*uc));
if (len > 0 && ptr[len-1] == '\n')
--len;
if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
uc->cmd = UC_SETSYNC;
else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
uc->cmd = UC_SETTAGS;
else if ((arg_len = is_keyword(ptr, len, "setorder")) != 0)
uc->cmd = UC_SETORDER;
else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
uc->cmd = UC_SETVERBOSE;
else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
uc->cmd = UC_SETWIDE;
else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
uc->cmd = UC_SETDEBUG;
else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
uc->cmd = UC_SETFLAG;
else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
uc->cmd = UC_RESETDEV;
else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
uc->cmd = UC_CLEARDEV;
else
arg_len = 0;
#ifdef DEBUG_PROC_INFO
printk("ncr_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
#endif
if (!arg_len)
return -EINVAL;
ptr += arg_len; len -= arg_len;
switch(uc->cmd) {
case UC_SETSYNC:
case UC_SETTAGS:
case UC_SETWIDE:
case UC_SETFLAG:
case UC_RESETDEV:
case UC_CLEARDEV:
SKIP_SPACES(1);
if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
ptr += arg_len; len -= arg_len;
uc->target = ~0;
} else {
GET_INT_ARG(target);
uc->target = (1<<target);
#ifdef DEBUG_PROC_INFO
printk("ncr_user_command: target=%ld\n", target);
#endif
}
break;
}
switch(uc->cmd) {
case UC_SETVERBOSE:
case UC_SETSYNC:
case UC_SETTAGS:
case UC_SETWIDE:
SKIP_SPACES(1);
GET_INT_ARG(uc->data);
#ifdef DEBUG_PROC_INFO
printk("ncr_user_command: data=%ld\n", uc->data);
#endif
break;
case UC_SETORDER:
SKIP_SPACES(1);
if ((arg_len = is_keyword(ptr, len, "simple")))
uc->data = M_SIMPLE_TAG;
else if ((arg_len = is_keyword(ptr, len, "ordered")))
uc->data = M_ORDERED_TAG;
else if ((arg_len = is_keyword(ptr, len, "default")))
uc->data = 0;
else
return -EINVAL;
break;
case UC_SETDEBUG:
while (len > 0) {
SKIP_SPACES(1);
if ((arg_len = is_keyword(ptr, len, "alloc")))
uc->data |= DEBUG_ALLOC;
else if ((arg_len = is_keyword(ptr, len, "phase")))
uc->data |= DEBUG_PHASE;
else if ((arg_len = is_keyword(ptr, len, "queue")))
uc->data |= DEBUG_QUEUE;
else if ((arg_len = is_keyword(ptr, len, "result")))
uc->data |= DEBUG_RESULT;
else if ((arg_len = is_keyword(ptr, len, "pointer")))
uc->data |= DEBUG_POINTER;
else if ((arg_len = is_keyword(ptr, len, "script")))
uc->data |= DEBUG_SCRIPT;
else if ((arg_len = is_keyword(ptr, len, "tiny")))
uc->data |= DEBUG_TINY;
else if ((arg_len = is_keyword(ptr, len, "timing")))
uc->data |= DEBUG_TIMING;
else if ((arg_len = is_keyword(ptr, len, "nego")))
uc->data |= DEBUG_NEGO;
else if ((arg_len = is_keyword(ptr, len, "tags")))
uc->data |= DEBUG_TAGS;
else
return -EINVAL;
ptr += arg_len; len -= arg_len;
}
#ifdef DEBUG_PROC_INFO
printk("ncr_user_command: data=%ld\n", uc->data);
#endif
break;
case UC_SETFLAG:
while (len > 0) {
SKIP_SPACES(1);
if ((arg_len = is_keyword(ptr, len, "trace")))
uc->data |= UF_TRACE;
else if ((arg_len = is_keyword(ptr, len, "no_disc")))
uc->data |= UF_NODISC;
else
return -EINVAL;
ptr += arg_len; len -= arg_len;
}
break;
default:
break;
}
if (len)
return -EINVAL;
else {
unsigned long flags;
NCR_LOCK_NCB(np, flags);
ncr_usercmd (np);
NCR_UNLOCK_NCB(np, flags);
}
return length;
}
#endif /* SCSI_NCR_USER_COMMAND_SUPPORT */
#ifdef SCSI_NCR_USER_INFO_SUPPORT
struct info_str
{
char *buffer;
int length;
int offset;
int pos;
};
static void copy_mem_info(struct info_str *info, char *data, int len)
{
if (info->pos + len > info->length)
len = info->length - info->pos;
if (info->pos + len < info->offset) {
info->pos += len;
return;
}
if (info->pos < info->offset) {
data += (info->offset - info->pos);
len -= (info->offset - info->pos);
}
if (len > 0) {
memcpy(info->buffer + info->pos, data, len);
info->pos += len;
}
}
static int copy_info(struct info_str *info, char *fmt, ...)
{
va_list args;
char buf[81];
int len;
va_start(args, fmt);
len = vsprintf(buf, fmt, args);
va_end(args);
copy_mem_info(info, buf, len);
return len;
}
/*
** Copy formatted information into the input buffer.
*/
static int ncr_host_info(ncb_p np, char *ptr, off_t offset, int len)
{
struct info_str info;
info.buffer = ptr;
info.length = len;
info.offset = offset;
info.pos = 0;
copy_info(&info, "General information:\n");
copy_info(&info, " Chip " NAME53C "%s, device id 0x%x, "
"revision id 0x%x\n",
np->chip_name, np->device_id, np->revision_id);
copy_info(&info, " On PCI bus %d, device %d, function %d, "
#ifdef __sparc__
"IRQ %s\n",
#else
"IRQ %d\n",
#endif
np->bus, (np->device_fn & 0xf8) >> 3, np->device_fn & 7,
#ifdef __sparc__
__irq_itoa(np->irq));
#else
(int) np->irq);
#endif
copy_info(&info, " Synchronous period factor %d, "
"max commands per lun %d\n",
(int) np->minsync, MAX_TAGS);
if (driver_setup.debug || driver_setup.verbose > 1) {
copy_info(&info, " Debug flags 0x%x, verbosity level %d\n",
driver_setup.debug, driver_setup.verbose);
}
return info.pos > info.offset? info.pos - info.offset : 0;
}
#endif /* SCSI_NCR_USER_INFO_SUPPORT */
/*
** Entry point of the scsi proc fs of the driver.
** - func = 0 means read (returns adapter infos)
** - func = 1 means write (parse user control command)
*/
static int sym53c8xx_proc_info(char *buffer, char **start, off_t offset,
int length, int hostno, int func)
{
struct Scsi_Host *host;
struct host_data *host_data;
ncb_p ncb = 0;
int retv;
#ifdef DEBUG_PROC_INFO
printk("sym53c8xx_proc_info: hostno=%d, func=%d\n", hostno, func);
#endif
host = scsi_host_hn_get(hostno);
if (!host)
return -EINVAL;
host_data = (struct host_data *) host->hostdata;
ncb = host_data->ncb;
retv = -EINVAL;
if (!ncb)
goto out;
if (func) {
#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
retv = ncr_user_command(ncb, buffer, length);
#endif
} else {
if (start)
*start = buffer;
#ifdef SCSI_NCR_USER_INFO_SUPPORT
retv = ncr_host_info(ncb, buffer, offset, length);
#endif
}
out:
scsi_host_put(host);
return retv;
}
/*=========================================================================
** End of proc file system stuff
**=========================================================================
*/
#endif
#ifdef SCSI_NCR_NVRAM_SUPPORT
/*
* 24C16 EEPROM reading.
*
* GPOI0 - data in/data out
* GPIO1 - clock
* Symbios NVRAM wiring now also used by Tekram.
*/
#define SET_BIT 0
#define CLR_BIT 1
#define SET_CLK 2
#define CLR_CLK 3
/*
* Set/clear data/clock bit in GPIO0
*/
static void __init
S24C16_set_bit(ncr_slot *np, u_char write_bit, u_char *gpreg, int bit_mode)
{
UDELAY (5);
switch (bit_mode){
case SET_BIT:
*gpreg |= write_bit;
break;
case CLR_BIT:
*gpreg &= 0xfe;
break;
case SET_CLK:
*gpreg |= 0x02;
break;
case CLR_CLK:
*gpreg &= 0xfd;
break;
}
OUTB (nc_gpreg, *gpreg);
UDELAY (5);
}
/*
* Send START condition to NVRAM to wake it up.
*/
static void __init S24C16_start(ncr_slot *np, u_char *gpreg)
{
S24C16_set_bit(np, 1, gpreg, SET_BIT);
S24C16_set_bit(np, 0, gpreg, SET_CLK);
S24C16_set_bit(np, 0, gpreg, CLR_BIT);
S24C16_set_bit(np, 0, gpreg, CLR_CLK);
}
/*
* Send STOP condition to NVRAM - puts NVRAM to sleep... ZZzzzz!!
*/
static void __init S24C16_stop(ncr_slot *np, u_char *gpreg)
{
S24C16_set_bit(np, 0, gpreg, SET_CLK);
S24C16_set_bit(np, 1, gpreg, SET_BIT);
}
/*
* Read or write a bit to the NVRAM,
* read if GPIO0 input else write if GPIO0 output
*/
static void __init
S24C16_do_bit(ncr_slot *np, u_char *read_bit, u_char write_bit, u_char *gpreg)
{
S24C16_set_bit(np, write_bit, gpreg, SET_BIT);
S24C16_set_bit(np, 0, gpreg, SET_CLK);
if (read_bit)
*read_bit = INB (nc_gpreg);
S24C16_set_bit(np, 0, gpreg, CLR_CLK);
S24C16_set_bit(np, 0, gpreg, CLR_BIT);
}
/*
* Output an ACK to the NVRAM after reading,
* change GPIO0 to output and when done back to an input
*/
static void __init
S24C16_write_ack(ncr_slot *np, u_char write_bit, u_char *gpreg, u_char *gpcntl)
{
OUTB (nc_gpcntl, *gpcntl & 0xfe);
S24C16_do_bit(np, 0, write_bit, gpreg);
OUTB (nc_gpcntl, *gpcntl);
}
/*
* Input an ACK from NVRAM after writing,
* change GPIO0 to input and when done back to an output
*/
static void __init
S24C16_read_ack(ncr_slot *np, u_char *read_bit, u_char *gpreg, u_char *gpcntl)
{
OUTB (nc_gpcntl, *gpcntl | 0x01);
S24C16_do_bit(np, read_bit, 1, gpreg);
OUTB (nc_gpcntl, *gpcntl);
}
/*
* WRITE a byte to the NVRAM and then get an ACK to see it was accepted OK,
* GPIO0 must already be set as an output
*/
static void __init
S24C16_write_byte(ncr_slot *np, u_char *ack_data, u_char write_data,
u_char *gpreg, u_char *gpcntl)
{
int x;
for (x = 0; x < 8; x++)
S24C16_do_bit(np, 0, (write_data >> (7 - x)) & 0x01, gpreg);
S24C16_read_ack(np, ack_data, gpreg, gpcntl);
}
/*
* READ a byte from the NVRAM and then send an ACK to say we have got it,
* GPIO0 must already be set as an input
*/
static void __init
S24C16_read_byte(ncr_slot *np, u_char *read_data, u_char ack_data,
u_char *gpreg, u_char *gpcntl)
{
int x;
u_char read_bit;
*read_data = 0;
for (x = 0; x < 8; x++) {
S24C16_do_bit(np, &read_bit, 1, gpreg);
*read_data |= ((read_bit & 0x01) << (7 - x));
}
S24C16_write_ack(np, ack_data, gpreg, gpcntl);
}
/*
* Read 'len' bytes starting at 'offset'.
*/
static int __init
sym_read_S24C16_nvram (ncr_slot *np, int offset, u_char *data, int len)
{
u_char gpcntl, gpreg;
u_char old_gpcntl, old_gpreg;
u_char ack_data;
int retv = 1;
int x;
/* save current state of GPCNTL and GPREG */
old_gpreg = INB (nc_gpreg);
old_gpcntl = INB (nc_gpcntl);
gpcntl = old_gpcntl & 0x1c;
/* set up GPREG & GPCNTL to set GPIO0 and GPIO1 in to known state */
OUTB (nc_gpreg, old_gpreg);
OUTB (nc_gpcntl, gpcntl);
/* this is to set NVRAM into a known state with GPIO0/1 both low */
gpreg = old_gpreg;
S24C16_set_bit(np, 0, &gpreg, CLR_CLK);
S24C16_set_bit(np, 0, &gpreg, CLR_BIT);
/* now set NVRAM inactive with GPIO0/1 both high */
S24C16_stop(np, &gpreg);
/* activate NVRAM */
S24C16_start(np, &gpreg);
/* write device code and random address MSB */
S24C16_write_byte(np, &ack_data,
0xa0 | ((offset >> 7) & 0x0e), &gpreg, &gpcntl);
if (ack_data & 0x01)
goto out;
/* write random address LSB */
S24C16_write_byte(np, &ack_data,
offset & 0xff, &gpreg, &gpcntl);
if (ack_data & 0x01)
goto out;
/* regenerate START state to set up for reading */
S24C16_start(np, &gpreg);
/* rewrite device code and address MSB with read bit set (lsb = 0x01) */
S24C16_write_byte(np, &ack_data,
0xa1 | ((offset >> 7) & 0x0e), &gpreg, &gpcntl);
if (ack_data & 0x01)
goto out;
/* now set up GPIO0 for inputting data */
gpcntl |= 0x01;
OUTB (nc_gpcntl, gpcntl);
/* input all requested data - only part of total NVRAM */
for (x = 0; x < len; x++)
S24C16_read_byte(np, &data[x], (x == (len-1)), &gpreg, &gpcntl);
/* finally put NVRAM back in inactive mode */
gpcntl &= 0xfe;
OUTB (nc_gpcntl, gpcntl);
S24C16_stop(np, &gpreg);
retv = 0;
out:
/* return GPIO0/1 to original states after having accessed NVRAM */
OUTB (nc_gpcntl, old_gpcntl);
OUTB (nc_gpreg, old_gpreg);
return retv;
}
#undef SET_BIT
#undef CLR_BIT
#undef SET_CLK
#undef CLR_CLK
/*
* Try reading Symbios NVRAM.
* Return 0 if OK.
*/
static int __init sym_read_Symbios_nvram (ncr_slot *np, Symbios_nvram *nvram)
{
static u_char Symbios_trailer[6] = {0xfe, 0xfe, 0, 0, 0, 0};
u_char *data = (u_char *) nvram;
int len = sizeof(*nvram);
u_short csum;
int x;
/* probe the 24c16 and read the SYMBIOS 24c16 area */
if (sym_read_S24C16_nvram (np, SYMBIOS_NVRAM_ADDRESS, data, len))
return 1;
/* check valid NVRAM signature, verify byte count and checksum */
if (nvram->type != 0 ||
memcmp(nvram->trailer, Symbios_trailer, 6) ||
nvram->byte_count != len - 12)
return 1;
/* verify checksum */
for (x = 6, csum = 0; x < len - 6; x++)
csum += data[x];
if (csum != nvram->checksum)
return 1;
return 0;
}
/*
* 93C46 EEPROM reading.
*
* GPOI0 - data in
* GPIO1 - data out
* GPIO2 - clock
* GPIO4 - chip select
*
* Used by Tekram.
*/
/*
* Pulse clock bit in GPIO0
*/
static void __init T93C46_Clk(ncr_slot *np, u_char *gpreg)
{
OUTB (nc_gpreg, *gpreg | 0x04);
UDELAY (2);
OUTB (nc_gpreg, *gpreg);
}
/*
* Read bit from NVRAM
*/
static void __init T93C46_Read_Bit(ncr_slot *np, u_char *read_bit, u_char *gpreg)
{
UDELAY (2);
T93C46_Clk(np, gpreg);
*read_bit = INB (nc_gpreg);
}
/*
* Write bit to GPIO0
*/
static void __init T93C46_Write_Bit(ncr_slot *np, u_char write_bit, u_char *gpreg)
{
if (write_bit & 0x01)
*gpreg |= 0x02;
else
*gpreg &= 0xfd;
*gpreg |= 0x10;
OUTB (nc_gpreg, *gpreg);
UDELAY (2);
T93C46_Clk(np, gpreg);
}
/*
* Send STOP condition to NVRAM - puts NVRAM to sleep... ZZZzzz!!
*/
static void __init T93C46_Stop(ncr_slot *np, u_char *gpreg)
{
*gpreg &= 0xef;
OUTB (nc_gpreg, *gpreg);
UDELAY (2);
T93C46_Clk(np, gpreg);
}
/*
* Send read command and address to NVRAM
*/
static void __init
T93C46_Send_Command(ncr_slot *np, u_short write_data,
u_char *read_bit, u_char *gpreg)
{
int x;
/* send 9 bits, start bit (1), command (2), address (6) */
for (x = 0; x < 9; x++)
T93C46_Write_Bit(np, (u_char) (write_data >> (8 - x)), gpreg);
*read_bit = INB (nc_gpreg);
}
/*
* READ 2 bytes from the NVRAM
*/
static void __init
T93C46_Read_Word(ncr_slot *np, u_short *nvram_data, u_char *gpreg)
{
int x;
u_char read_bit;
*nvram_data = 0;
for (x = 0; x < 16; x++) {
T93C46_Read_Bit(np, &read_bit, gpreg);
if (read_bit & 0x01)
*nvram_data |= (0x01 << (15 - x));
else
*nvram_data &= ~(0x01 << (15 - x));
}
}
/*
* Read Tekram NvRAM data.
*/
static int __init
T93C46_Read_Data(ncr_slot *np, u_short *data,int len,u_char *gpreg)
{
u_char read_bit;
int x;
for (x = 0; x < len; x++) {
/* output read command and address */
T93C46_Send_Command(np, 0x180 | x, &read_bit, gpreg);
if (read_bit & 0x01)
return 1; /* Bad */
T93C46_Read_Word(np, &data[x], gpreg);
T93C46_Stop(np, gpreg);
}
return 0;
}
/*
* Try reading 93C46 Tekram NVRAM.
*/
static int __init
sym_read_T93C46_nvram (ncr_slot *np, Tekram_nvram *nvram)
{
u_char gpcntl, gpreg;
u_char old_gpcntl, old_gpreg;
int retv = 1;
/* save current state of GPCNTL and GPREG */
old_gpreg = INB (nc_gpreg);
old_gpcntl = INB (nc_gpcntl);
/* set up GPREG & GPCNTL to set GPIO0/1/2/4 in to known state, 0 in,
1/2/4 out */
gpreg = old_gpreg & 0xe9;
OUTB (nc_gpreg, gpreg);
gpcntl = (old_gpcntl & 0xe9) | 0x09;
OUTB (nc_gpcntl, gpcntl);
/* input all of NVRAM, 64 words */
retv = T93C46_Read_Data(np, (u_short *) nvram,
sizeof(*nvram) / sizeof(short), &gpreg);
/* return GPIO0/1/2/4 to original states after having accessed NVRAM */
OUTB (nc_gpcntl, old_gpcntl);
OUTB (nc_gpreg, old_gpreg);
return retv;
}
/*
* Try reading Tekram NVRAM.
* Return 0 if OK.
*/
static int __init
sym_read_Tekram_nvram (ncr_slot *np, u_short device_id, Tekram_nvram *nvram)
{
u_char *data = (u_char *) nvram;
int len = sizeof(*nvram);
u_short csum;
int x;
switch (device_id) {
case PCI_DEVICE_ID_NCR_53C885:
case PCI_DEVICE_ID_NCR_53C895:
case PCI_DEVICE_ID_NCR_53C896:
x = sym_read_S24C16_nvram(np, TEKRAM_24C16_NVRAM_ADDRESS,
data, len);
break;
case PCI_DEVICE_ID_NCR_53C875:
x = sym_read_S24C16_nvram(np, TEKRAM_24C16_NVRAM_ADDRESS,
data, len);
if (!x)
break;
default:
x = sym_read_T93C46_nvram(np, nvram);
break;
}
if (x)
return 1;
/* verify checksum */
for (x = 0, csum = 0; x < len - 1; x += 2)
csum += data[x] + (data[x+1] << 8);
if (csum != 0x1234)
return 1;
return 0;
}
#endif /* SCSI_NCR_NVRAM_SUPPORT */
/*
** Module stuff
*/
MODULE_LICENSE("GPL");
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,4,0)
static
#endif
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,4,0) || defined(MODULE)
Scsi_Host_Template driver_template = SYM53C8XX;
#include "scsi_module.c"
#endif