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kernel / pub / scm / linux / kernel / git / tglx / history / refs/tags/v2.5.2 / . / drivers / scsi / sym53c8xx_2 / sym_glue.c
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/*
* Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
* of PCI-SCSI IO processors.
*
* Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
*
* This driver is derived from the Linux sym53c8xx driver.
* Copyright (C) 1998-2000 Gerard Roudier
*
* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
* a port of the FreeBSD ncr driver to Linux-1.2.13.
*
* The original ncr driver has been written for 386bsd and FreeBSD by
* Wolfgang Stanglmeier <wolf@cologne.de>
* Stefan Esser <se@mi.Uni-Koeln.de>
* Copyright (C) 1994 Wolfgang Stanglmeier
*
* Other major contributions:
*
* NVRAM detection and reading.
* Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
*
*-----------------------------------------------------------------------------
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Where this Software is combined with software released under the terms of
* the GNU Public License ("GPL") and the terms of the GPL would require the
* combined work to also be released under the terms of the GPL, the terms
* and conditions of this License will apply in addition to those of the
* GPL with the exception of any terms or conditions of this License that
* conflict with, or are expressly prohibited by, the GPL.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#define SYM_GLUE_C
#include <linux/module.h>
#include "sym_glue.h"
#define NAME53C "sym53c"
#define NAME53C8XX "sym53c8xx"
/*
* Simple Wrapper to kernel PCI bus interface.
*/
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
}
#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) do { ;} while (0)
#endif
/*
* Insert a delay in micro-seconds and milli-seconds.
*/
void sym_udelay(int us) { udelay(us); }
void sym_mdelay(int ms) { mdelay(ms); }
/*
* SMP threading.
*
* The whole SCSI sub-system under Linux is basically single-threaded.
* Everything, including low-level driver interrupt routine, happens
* whith the `io_request_lock' held.
* The sym53c8xx-1.x drivers series ran their interrupt code using a
* spin mutex per controller. This added complexity without improving
* scalability significantly. the sym-2 driver still use a spinlock
* per controller for safety, but basically runs with the damned
* io_request_lock held.
*/
spinlock_t sym53c8xx_lock = SPIN_LOCK_UNLOCKED;
#define SYM_LOCK_DRIVER(flags) spin_lock_irqsave(&sym53c8xx_lock, flags)
#define SYM_UNLOCK_DRIVER(flags) spin_unlock_irqrestore(&sym53c8xx_lock,flags)
#define SYM_INIT_LOCK_HCB(np) spin_lock_init((np)->s.host->host_lock);
#define SYM_LOCK_HCB(np, flags) \
spin_lock_irqsave((np)->s.host->host_lock, flags)
#define SYM_UNLOCK_HCB(np, flags) \
spin_unlock_irqrestore((np)->s.host->host_lock, flags)
/*
* These simple macros limit expression involving
* kernel time values (jiffies) to some that have
* chance not to be too much incorrect. :-)
*/
#define ktime_get(o) (jiffies + (u_long) o)
#define ktime_exp(b) ((long)(jiffies) - (long)(b) >= 0)
#define ktime_dif(a, b) ((long)(a) - (long)(b))
#define ktime_add(a, o) ((a) + (u_long)(o))
#define ktime_sub(a, o) ((a) - (u_long)(o))
/*
* Wrappers to the generic memory allocator.
*/
void *sym_calloc(int size, char *name)
{
u_long flags;
void *m;
SYM_LOCK_DRIVER(flags);
m = sym_calloc_unlocked(size, name);
SYM_UNLOCK_DRIVER(flags);
return m;
}
void sym_mfree(void *m, int size, char *name)
{
u_long flags;
SYM_LOCK_DRIVER(flags);
sym_mfree_unlocked(m, size, name);
SYM_UNLOCK_DRIVER(flags);
}
#ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
void *__sym_calloc_dma(m_pool_ident_t dev_dmat, int size, char *name)
{
u_long flags;
void *m;
SYM_LOCK_DRIVER(flags);
m = __sym_calloc_dma_unlocked(dev_dmat, size, name);
SYM_UNLOCK_DRIVER(flags);
return m;
}
void __sym_mfree_dma(m_pool_ident_t dev_dmat, void *m, int size, char *name)
{
u_long flags;
SYM_LOCK_DRIVER(flags);
__sym_mfree_dma_unlocked(dev_dmat, m, size, name);
SYM_UNLOCK_DRIVER(flags);
}
m_addr_t __vtobus(m_pool_ident_t dev_dmat, void *m)
{
u_long flags;
m_addr_t b;
SYM_LOCK_DRIVER(flags);
b = __vtobus_unlocked(dev_dmat, m);
SYM_UNLOCK_DRIVER(flags);
return b;
}
#endif /* SYM_LINUX_DYNAMIC_DMA_MAPPING */
/*
* Map/unmap a PCI memory window.
*/
#ifndef SYM_OPT_NO_BUS_MEMORY_MAPPING
static u_long __init pci_map_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 pci_unmap_mem(u_long vaddr, u_long size)
{
if (vaddr)
iounmap((void *) (vaddr & PAGE_MASK));
}
#endif
/*
* Used to retrieve the host structure when the
* driver is called from the proc FS.
*/
static struct Scsi_Host *first_host = NULL;
/*
* /proc directory entry and proc_info.
*/
#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
/*
* Transfer direction
*
* Until some linux kernel version near 2.3.40, low-level scsi
* drivers were not told about data transfer direction.
*/
#if LINUX_VERSION_CODE > LinuxVersionCode(2, 3, 40)
#define scsi_data_direction(cmd) (cmd->sc_data_direction)
#else
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
/*
* Driver host data structure.
*/
struct host_data {
hcb_p ncb;
};
/*
* Some type that fit DMA addresses as seen from BUS.
*/
#ifndef SYM_LINUX_DYNAMIC_DMA_MAPPING
typedef u_long bus_addr_t;
#else
#if SYM_CONF_DMA_ADDRESSING_MODE > 0
typedef dma64_addr_t bus_addr_t;
#else
typedef dma_addr_t bus_addr_t;
#endif
#endif
/*
* Used by the eh thread to wait for command completion.
* It is allocated on the eh thread stack.
*/
struct sym_eh_wait {
struct semaphore sem;
struct timer_list timer;
void (*old_done)(Scsi_Cmnd *);
int to_do;
int timed_out;
};
/*
* Driver private area in the SCSI command structure.
*/
struct sym_ucmd { /* Override the SCSI pointer structure */
SYM_QUEHEAD link_cmdq; /* Must stay at offset ZERO */
#ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
bus_addr_t data_mapping;
u_char data_mapped;
#endif
struct sym_eh_wait *eh_wait;
};
typedef struct sym_ucmd *ucmd_p;
#define SYM_UCMD_PTR(cmd) ((ucmd_p)(&(cmd)->SCp))
#define SYM_SCMD_PTR(ucmd) sym_que_entry(ucmd, Scsi_Cmnd, SCp)
#define SYM_SOFTC_PTR(cmd) (((struct host_data *)cmd->host->hostdata)->ncb)
/*
* Deal with DMA mapping/unmapping.
*/
#ifndef SYM_LINUX_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 bus_sg_dma_address(sc) vtobus((sc)->address)
#define bus_sg_dma_len(sc) ((sc)->length)
#else /* Linux version with pci bus iommu kernel interface */
#define bus_unmap_sg(pdev, sgptr, sgcnt, dir) \
pci_unmap_sg(pdev, sgptr, sgcnt, dir)
#define bus_unmap_single(pdev, mapping, bufptr, dir) \
pci_unmap_single(pdev, mapping, bufptr, dir)
#define bus_map_single(pdev, bufptr, bufsiz, dir) \
pci_map_single(pdev, bufptr, bufsiz, dir)
#define bus_map_sg(pdev, sgptr, sgcnt, dir) \
pci_map_sg(pdev, sgptr, sgcnt, dir)
#define bus_dma_sync_sg(pdev, sgptr, sgcnt, dir) \
pci_dma_sync_sg(pdev, sgptr, sgcnt, dir)
#define bus_dma_sync_single(pdev, mapping, bufsiz, dir) \
pci_dma_sync_single(pdev, mapping, bufsiz, dir)
#define bus_sg_dma_address(sc) sg_dma_address(sc)
#define bus_sg_dma_len(sc) sg_dma_len(sc)
static void __unmap_scsi_data(pcidev_t pdev, Scsi_Cmnd *cmd)
{
int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
switch(SYM_UCMD_PTR(cmd)->data_mapped) {
case 2:
bus_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
break;
case 1:
bus_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
cmd->request_bufflen, dma_dir);
break;
}
SYM_UCMD_PTR(cmd)->data_mapped = 0;
}
static bus_addr_t __map_scsi_single_data(pcidev_t pdev, Scsi_Cmnd *cmd)
{
bus_addr_t mapping;
int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
mapping = bus_map_single(pdev, cmd->request_buffer,
cmd->request_bufflen, dma_dir);
if (mapping) {
SYM_UCMD_PTR(cmd)->data_mapped = 1;
SYM_UCMD_PTR(cmd)->data_mapping = 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);
use_sg = bus_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
if (use_sg > 0) {
SYM_UCMD_PTR(cmd)->data_mapped = 2;
SYM_UCMD_PTR(cmd)->data_mapping = 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(SYM_UCMD_PTR(cmd)->data_mapped) {
case 2:
bus_dma_sync_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
break;
case 1:
bus_dma_sync_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
cmd->request_bufflen, dma_dir);
break;
}
}
#endif /* SYM_LINUX_DYNAMIC_DMA_MAPPING */
#define unmap_scsi_data(np, cmd) \
__unmap_scsi_data(np->s.device, cmd)
#define map_scsi_single_data(np, cmd) \
__map_scsi_single_data(np->s.device, cmd)
#define map_scsi_sg_data(np, cmd) \
__map_scsi_sg_data(np->s.device, cmd)
#define sync_scsi_data(np, cmd) \
__sync_scsi_data(np->s.device, cmd)
/*
* Complete a pending CAM CCB.
*/
void sym_xpt_done(hcb_p np, Scsi_Cmnd *ccb)
{
sym_remque(&SYM_UCMD_PTR(ccb)->link_cmdq);
unmap_scsi_data(np, ccb);
ccb->scsi_done(ccb);
}
void sym_xpt_done2(hcb_p np, Scsi_Cmnd *ccb, int cam_status)
{
sym_set_cam_status(ccb, cam_status);
sym_xpt_done(np, ccb);
}
/*
* Print something that identifies the IO.
*/
void sym_print_addr (ccb_p cp)
{
Scsi_Cmnd *cmd = cp->cam_ccb;
if (cmd)
printf("%s:%d:%d:", sym_name(SYM_SOFTC_PTR(cmd)),
cmd->target,cmd->lun);
}
/*
* Tell the SCSI layer about a BUS RESET.
*/
void sym_xpt_async_bus_reset(hcb_p np)
{
printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
np->s.settle_time = ktime_get(sym_driver_setup.settle_delay * HZ);
np->s.settle_time_valid = 1;
if (sym_verbose >= 2)
printf_info("%s: command processing suspended for %d seconds\n",
sym_name(np), sym_driver_setup.settle_delay);
}
/*
* Tell the SCSI layer about a BUS DEVICE RESET message sent.
*/
void sym_xpt_async_sent_bdr(hcb_p np, int target)
{
printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
}
/*
* Tell the SCSI layer about the new transfer parameters.
*/
void sym_xpt_async_nego_wide(hcb_p np, int target)
{
if (sym_verbose < 3)
return;
sym_announce_transfer_rate(np, target);
}
/*
* Choose the more appropriate CAM status if
* the IO encountered an extended error.
*/
static int sym_xerr_cam_status(int cam_status, int x_status)
{
if (x_status) {
if (x_status & XE_PARITY_ERR)
cam_status = DID_PARITY;
else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
cam_status = DID_ERROR;
else if (x_status & XE_BAD_PHASE)
cam_status = DID_ERROR;
else
cam_status = DID_ERROR;
}
return cam_status;
}
/*
* Build CAM result for a failed or auto-sensed IO.
*/
void sym_set_cam_result_error(hcb_p np, ccb_p cp, int resid)
{
Scsi_Cmnd *csio = cp->cam_ccb;
u_int cam_status, scsi_status, drv_status;
drv_status = 0;
cam_status = DID_OK;
scsi_status = cp->ssss_status;
if (cp->host_flags & HF_SENSE) {
scsi_status = cp->sv_scsi_status;
resid = cp->sv_resid;
if (sym_verbose && cp->sv_xerr_status)
sym_print_xerr(cp, cp->sv_xerr_status);
if (cp->host_status == HS_COMPLETE &&
cp->ssss_status == S_GOOD &&
cp->xerr_status == 0) {
cam_status = sym_xerr_cam_status(DID_OK,
cp->sv_xerr_status);
drv_status = DRIVER_SENSE;
/*
* Bounce back the sense data to user.
*/
bzero(&csio->sense_buffer, sizeof(csio->sense_buffer));
bcopy(cp->sns_bbuf, csio->sense_buffer,
MIN(sizeof(csio->sense_buffer),SYM_SNS_BBUF_LEN));
#if 0
/*
* If the device reports a UNIT ATTENTION condition
* due to a RESET condition, we should consider all
* disconnect CCBs for this unit as aborted.
*/
if (1) {
u_char *p;
p = (u_char *) csio->sense_data;
if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
sym_clear_tasks(np, DID_ABORT,
cp->target,cp->lun, -1);
}
#endif
}
else
cam_status = DID_ERROR;
}
else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
cam_status = DID_OK;
else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
cam_status = DID_NO_CONNECT;
else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
cam_status = DID_ERROR;
else { /* Extended error */
if (sym_verbose) {
PRINT_ADDR(cp);
printf ("COMMAND FAILED (%x %x %x).\n",
cp->host_status, cp->ssss_status,
cp->xerr_status);
}
/*
* Set the most appropriate value for CAM status.
*/
cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
}
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,99)
csio->resid = resid;
#endif
csio->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
}
/*
* Called on successfull INQUIRY response.
*/
void sym_sniff_inquiry(hcb_p np, Scsi_Cmnd *cmd, int resid)
{
int retv;
if (!cmd || cmd->use_sg)
return;
sync_scsi_data(np, cmd);
retv = __sym_sniff_inquiry(np, cmd->target, cmd->lun,
(u_char *) cmd->request_buffer,
cmd->request_bufflen - resid);
if (retv < 0)
return;
else if (retv)
sym_update_trans_settings(np, &np->target[cmd->target]);
}
/*
* Build the scatter/gather array for an I/O.
*/
static int sym_scatter_no_sglist(hcb_p np, ccb_p cp, Scsi_Cmnd *cmd)
{
struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
int segment;
cp->data_len = cmd->request_bufflen;
if (cmd->request_bufflen) {
bus_addr_t baddr = map_scsi_single_data(np, cmd);
if (baddr) {
sym_build_sge(np, data, baddr, cmd->request_bufflen);
segment = 1;
}
else
segment = -2;
}
else
segment = 0;
return segment;
}
static int sym_scatter(hcb_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 = sym_scatter_no_sglist(np, cp, cmd);
else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
struct sym_tblmove *data;
if (use_sg > SYM_CONF_MAX_SG) {
unmap_scsi_data(np, cmd);
return -1;
}
data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
for (segment = 0; segment < use_sg; segment++) {
bus_addr_t baddr = bus_sg_dma_address(&scatter[segment]);
unsigned int len = bus_sg_dma_len(&scatter[segment]);
sym_build_sge(np, &data[segment], baddr, len);
cp->data_len += len;
}
}
else
segment = -2;
return segment;
}
/*
* Queue a SCSI command.
*/
static int sym_queue_command(hcb_p np, Scsi_Cmnd *ccb)
{
/* Scsi_Device *device = ccb->device; */
tcb_p tp;
lcb_p lp;
ccb_p cp;
int order;
/*
* Minimal checkings, so that we will not
* go outside our tables.
*/
if (ccb->target == np->myaddr ||
ccb->target >= SYM_CONF_MAX_TARGET ||
ccb->lun >= SYM_CONF_MAX_LUN) {
sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
return 0;
}
/*
* Retreive the target descriptor.
*/
tp = &np->target[ccb->target];
/*
* Complete the 1st INQUIRY command with error
* condition if the device is flagged NOSCAN
* at BOOT in the NVRAM. This may speed up
* the boot and maintain coherency with BIOS
* device numbering. Clearing the flag allows
* user to rescan skipped devices later.
* We also return error for devices not flagged
* for SCAN LUNS in the NVRAM since some mono-lun
* devices behave badly when asked for some non
* zero LUN. Btw, this is an absolute hack.:-)
*/
if (ccb->cmnd[0] == 0x12 || ccb->cmnd[0] == 0x0) {
if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
((tp->usrflags & SYM_SCAN_LUNS_DISABLED) &&
ccb->lun != 0)) {
tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
return 0;
}
}
/*
* Select tagged/untagged.
*/
lp = sym_lp(np, tp, ccb->lun);
order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
/*
* Queue the SCSI IO.
*/
cp = sym_get_ccb(np, ccb->target, ccb->lun, order);
if (!cp)
return 1; /* Means resource shortage */
(void) sym_queue_scsiio(np, ccb, cp);
return 0;
}
/*
* Setup buffers and pointers that address the CDB.
*/
static int __inline sym_setup_cdb(hcb_p np, Scsi_Cmnd *ccb, ccb_p cp)
{
u32 cmd_ba;
int cmd_len;
/*
* CDB is 16 bytes max.
*/
if (ccb->cmd_len > sizeof(cp->cdb_buf)) {
sym_set_cam_status(cp->cam_ccb, CAM_REQ_INVALID);
return -1;
}
bcopy(ccb->cmnd, cp->cdb_buf, ccb->cmd_len);
cmd_ba = CCB_BA (cp, cdb_buf[0]);
cmd_len = ccb->cmd_len;
cp->phys.cmd.addr = cpu_to_scr(cmd_ba);
cp->phys.cmd.size = cpu_to_scr(cmd_len);
return 0;
}
/*
* Setup pointers that address the data and start the I/O.
*/
int sym_setup_data_and_start(hcb_p np, Scsi_Cmnd *csio, ccb_p cp)
{
int dir;
tcb_p tp = &np->target[cp->target];
lcb_p lp = sym_lp(np, tp, cp->lun);
/*
* Build the CDB.
*/
if (sym_setup_cdb(np, csio, cp))
goto out_abort;
/*
* No direction means no data.
*/
dir = scsi_data_direction(csio);
if (dir != SCSI_DATA_NONE) {
cp->segments = sym_scatter (np, cp, csio);
if (cp->segments < 0) {
if (cp->segments == -2)
sym_set_cam_status(csio, CAM_RESRC_UNAVAIL);
else
sym_set_cam_status(csio, CAM_REQ_TOO_BIG);
goto out_abort;
}
}
else {
cp->data_len = 0;
cp->segments = 0;
}
/*
* Set data pointers.
*/
sym_setup_data_pointers(np, cp, dir);
/*
* When `#ifed 1', the code below makes the driver
* panic on the first attempt to write to a SCSI device.
* It is the first test we want to do after a driver
* change that does not seem obviously safe. :)
*/
#if 0
switch (cp->cdb_buf[0]) {
case 0x0A: case 0x2A: case 0xAA:
panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
MDELAY(10000);
break;
default:
break;
}
#endif
/*
* activate this job.
*/
if (lp)
sym_start_next_ccbs(np, lp, 2);
else
sym_put_start_queue(np, cp);
return 0;
out_abort:
sym_free_ccb(np, cp);
sym_xpt_done(np, csio);
return 0;
}
/*
* timer daemon.
*
* Misused to keep the driver running when
* interrupts are not configured correctly.
*/
static void sym_timer (hcb_p np)
{
u_long thistime = ktime_get(0);
#if LINUX_VERSION_CODE < LinuxVersionCode(2, 4, 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->s.release_stage) {
if (np->s.release_stage == 1)
np->s.release_stage = 2;
return;
}
#endif
/*
* Restart the timer.
*/
#ifdef SYM_CONF_PCIQ_BROKEN_INTR
np->s.timer.expires = ktime_get((HZ+99)/100);
#else
np->s.timer.expires = ktime_get(SYM_CONF_TIMER_INTERVAL);
#endif
add_timer(&np->s.timer);
/*
* If we are resetting the ncr, wait for settle_time before
* clearing it. Then command processing will be resumed.
*/
if (np->s.settle_time_valid) {
if (ktime_dif(np->s.settle_time, thistime) <= 0){
if (sym_verbose >= 2 )
printk("%s: command processing resumed\n",
sym_name(np));
np->s.settle_time_valid = 0;
}
return;
}
/*
* Nothing to do for now, but that may come.
*/
if (np->s.lasttime + 4*HZ < thistime) {
np->s.lasttime = thistime;
}
#ifdef SYM_CONF_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.
*/
sym_wakeup_done(np);
#endif
#ifdef SYM_CONF_PCIQ_BROKEN_INTR
if (INB(nc_istat) & (INTF|SIP|DIP)) {
/*
** Process pending interrupts.
*/
if (DEBUG_FLAGS & DEBUG_TINY) printk ("{");
sym_interrupt(np);
if (DEBUG_FLAGS & DEBUG_TINY) printk ("}");
}
#endif /* SYM_CONF_PCIQ_BROKEN_INTR */
}
/*
* PCI BUS error handler.
*/
void sym_log_bus_error(hcb_p np)
{
u_short pci_sts;
pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
if (pci_sts & 0xf900) {
pci_write_config_word(np->s.device, PCI_STATUS,
pci_sts);
printf("%s: PCI STATUS = 0x%04x\n",
sym_name(np), pci_sts & 0xf900);
}
}
/*
* Requeue awaiting commands.
*/
static void sym_requeue_awaiting_cmds(hcb_p np)
{
Scsi_Cmnd *cmd;
ucmd_p ucp = SYM_UCMD_PTR(cmd);
SYM_QUEHEAD tmp_cmdq;
int sts;
sym_que_move(&np->s.wait_cmdq, &tmp_cmdq);
while ((ucp = (ucmd_p) sym_remque_head(&tmp_cmdq)) != 0) {
sym_insque_tail(&ucp->link_cmdq, &np->s.busy_cmdq);
cmd = SYM_SCMD_PTR(ucp);
sts = sym_queue_command(np, cmd);
if (sts) {
sym_remque(&ucp->link_cmdq);
sym_insque_head(&ucp->link_cmdq, &np->s.wait_cmdq);
}
}
}
/*
* Linux entry point of the queuecommand() function
*/
int sym53c8xx_queue_command (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *))
{
hcb_p np = SYM_SOFTC_PTR(cmd);
ucmd_p ucp = SYM_UCMD_PTR(cmd);
int sts = 0;
#if 0
u_long flags;
#endif
cmd->scsi_done = done;
cmd->host_scribble = NULL;
memset(ucp, 0, sizeof(*ucp));
#if 0
SYM_LOCK_HCB(np, flags);
#endif
/*
* Shorten our settle_time if needed for
* this command not to time out.
*/
if (np->s.settle_time_valid && cmd->timeout_per_command) {
u_long tlimit = ktime_get(cmd->timeout_per_command);
tlimit = ktime_sub(tlimit, SYM_CONF_TIMER_INTERVAL*2);
if (ktime_dif(np->s.settle_time, tlimit) > 0) {
np->s.settle_time = tlimit;
}
}
if (np->s.settle_time_valid || !sym_que_empty(&np->s.wait_cmdq)) {
sym_insque_tail(&ucp->link_cmdq, &np->s.wait_cmdq);
goto out;
}
sym_insque_tail(&ucp->link_cmdq, &np->s.busy_cmdq);
sts = sym_queue_command(np, cmd);
if (sts) {
sym_remque(&ucp->link_cmdq);
sym_insque_tail(&ucp->link_cmdq, &np->s.wait_cmdq);
}
out:
#if 0
SYM_UNLOCK_HCB(np, flags);
#endif
return 0;
}
/*
* Linux entry point of the interrupt handler.
*/
static void sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
{
unsigned long flags;
hcb_p np = (hcb_p) dev_id;
if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
SYM_LOCK_HCB(np, flags);
sym_interrupt(np);
/*
* push queue walk-through to tasklet
*/
if (!sym_que_empty(&np->s.wait_cmdq) && !np->s.settle_time_valid)
sym_requeue_awaiting_cmds(np);
SYM_UNLOCK_HCB(np, flags);
if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
}
/*
* Linux entry point of the timer handler
*/
static void sym53c8xx_timer(unsigned long npref)
{
hcb_p np = (hcb_p) npref;
unsigned long flags;
SYM_LOCK_HCB(np, flags);
sym_timer(np);
if (!sym_que_empty(&np->s.wait_cmdq) && !np->s.settle_time_valid)
sym_requeue_awaiting_cmds(np);
SYM_UNLOCK_HCB(np, flags);
}
/*
* What the eh thread wants us to perform.
*/
#define SYM_EH_ABORT 0
#define SYM_EH_DEVICE_RESET 1
#define SYM_EH_BUS_RESET 2
#define SYM_EH_HOST_RESET 3
/*
* What we will do regarding the involved SCSI command.
*/
#define SYM_EH_DO_IGNORE 0
#define SYM_EH_DO_COMPLETE 1
#define SYM_EH_DO_WAIT 2
/*
* Our general completion handler.
*/
static void __sym_eh_done(Scsi_Cmnd *cmd, int timed_out)
{
struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
if (!ep)
return;
/* Try to avoid a race here (not 100% safe) */
if (!timed_out) {
ep->timed_out = 0;
if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
return;
}
/* Revert everything */
SYM_UCMD_PTR(cmd)->eh_wait = 0;
cmd->scsi_done = ep->old_done;
/* Wake up the eh thread if it wants to sleep */
if (ep->to_do == SYM_EH_DO_WAIT)
up(&ep->sem);
}
/*
* scsi_done() alias when error recovery is in progress.
*/
static void sym_eh_done(Scsi_Cmnd *cmd) { __sym_eh_done(cmd, 0); }
/*
* Some timeout handler to avoid waiting too long.
*/
static void sym_eh_timeout(u_long p) { __sym_eh_done((Scsi_Cmnd *)p, 1); }
/*
* Generic method for our eh processing.
* The 'op' argument tells what we have to do.
*/
static int sym_eh_handler(int op, char *opname, Scsi_Cmnd *cmd)
{
hcb_p np = SYM_SOFTC_PTR(cmd);
unsigned long flags;
SYM_QUEHEAD *qp;
int to_do = SYM_EH_DO_IGNORE;
int sts = -1;
struct sym_eh_wait eh, *ep = &eh;
char devname[20];
sprintf(devname, "%s:%d:%d", sym_name(np), cmd->target, cmd->lun);
printf_warning("%s: %s operation started.\n", devname, opname);
SYM_LOCK_HCB(np, flags);
#if 0
/* This one should be the result of some race, thus to ignore */
if (cmd->serial_number != cmd->serial_number_at_timeout)
goto prepare;
#endif
/* This one is not queued to the core driver -> to complete here */
FOR_EACH_QUEUED_ELEMENT(&np->s.wait_cmdq, qp) {
if (SYM_SCMD_PTR(qp) == cmd) {
to_do = SYM_EH_DO_COMPLETE;
goto prepare;
}
}
/* This one is queued in some place -> to wait for completion */
FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
ccb_p cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
if (cp->cam_ccb == cmd) {
to_do = SYM_EH_DO_WAIT;
goto prepare;
}
}
prepare:
/* Prepare stuff to either ignore, complete or wait for completion */
switch(to_do) {
default:
case SYM_EH_DO_IGNORE:
goto finish;
break;
case SYM_EH_DO_WAIT:
#if LINUX_VERSION_CODE > LinuxVersionCode(2,3,0)
init_MUTEX_LOCKED(&ep->sem);
#else
ep->sem = MUTEX_LOCKED;
#endif
/* fall through */
case SYM_EH_DO_COMPLETE:
ep->old_done = cmd->scsi_done;
cmd->scsi_done = sym_eh_done;
SYM_UCMD_PTR(cmd)->eh_wait = ep;
}
/* Try to proceed the operation we have been asked for */
sts = -1;
switch(op) {
case SYM_EH_ABORT:
sts = sym_abort_scsiio(np, cmd, 1);
break;
case SYM_EH_DEVICE_RESET:
sts = sym_reset_scsi_target(np, cmd->target);
break;
case SYM_EH_BUS_RESET:
sym_reset_scsi_bus(np, 1);
sts = 0;
break;
case SYM_EH_HOST_RESET:
sym_reset_scsi_bus(np, 0);
sym_start_up (np, 1);
sts = 0;
break;
default:
break;
}
/* On error, restore everything and cross fingers :) */
if (sts) {
SYM_UCMD_PTR(cmd)->eh_wait = 0;
cmd->scsi_done = ep->old_done;
to_do = SYM_EH_DO_IGNORE;
}
finish:
ep->to_do = to_do;
/* Complete the command with locks held as required by the driver */
if (to_do == SYM_EH_DO_COMPLETE)
sym_xpt_done2(np, cmd, CAM_REQ_ABORTED);
SYM_UNLOCK_HCB(np, flags);
/* Wait for completion with locks released, as required by kernel */
if (to_do == SYM_EH_DO_WAIT) {
init_timer(&ep->timer);
ep->timer.expires = jiffies + (5*HZ);
ep->timer.function = sym_eh_timeout;
ep->timer.data = (u_long)cmd;
ep->timed_out = 1; /* Be pessimistic for once :) */
add_timer(&ep->timer);
down(&ep->sem);
if (ep->timed_out)
sts = -2;
}
printf_warning("%s: %s operation %s.\n", devname, opname,
sts==0?"complete":sts==-2?"timed-out":"failed");
return sts? SCSI_FAILED : SCSI_SUCCESS;
}
/*
* Error handlers called from the eh thread (one thread per HBA).
*/
int sym53c8xx_eh_abort_handler(Scsi_Cmnd *cmd)
{
return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
}
int sym53c8xx_eh_device_reset_handler(Scsi_Cmnd *cmd)
{
return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
}
int sym53c8xx_eh_bus_reset_handler(Scsi_Cmnd *cmd)
{
return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
}
int sym53c8xx_eh_host_reset_handler(Scsi_Cmnd *cmd)
{
return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
}
/*
* Tune device queuing depth, according to various limits.
*/
static void
sym_tune_dev_queuing(hcb_p np, int target, int lun, u_short reqtags)
{
tcb_p tp = &np->target[target];
lcb_p lp = sym_lp(np, tp, lun);
u_short oldtags;
if (!lp)
return;
oldtags = lp->s.reqtags;
if (reqtags > lp->s.scdev_depth)
reqtags = lp->s.scdev_depth;
lp->started_limit = reqtags ? reqtags : 2;
lp->started_max = 1;
lp->s.reqtags = reqtags;
if (reqtags != oldtags) {
printf_info("%s:%d:%d: "
"tagged command queuing %s, command queue depth %d.\n",
sym_name(np), target, lun,
lp->s.reqtags ? "enabled" : "disabled",
lp->started_limit);
}
}
#ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
/*
* Linux select queue depths function
*/
#define DEF_DEPTH (sym_driver_setup.max_tag)
#define ALL_TARGETS -2
#define NO_TARGET -1
#define ALL_LUNS -2
#define NO_LUN -1
static int device_queue_depth(hcb_p np, int target, int lun)
{
int c, h, t, u, v;
char *p = sym_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->s.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;
}
#else
#define device_queue_depth(np, t, l) (sym_driver_setup.max_tag)
#endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
/*
* Linux entry point for device queue sizing.
*/
static void
sym53c8xx_select_queue_depths(struct Scsi_Host *host,
struct scsi_device *devlist)
{
struct scsi_device *device;
for (device = devlist; device; device = device->next) {
hcb_p np;
tcb_p tp;
lcb_p lp;
int reqtags;
if (device->host != host)
continue;
np = ((struct host_data *) host->hostdata)->ncb;
tp = &np->target[device->id];
/*
* Get user settings for transfer parameters.
*/
tp->inq_byte7_valid = (INQ7_SYNC|INQ7_WIDE16);
sym_update_trans_settings(np, tp);
/*
* Allocate the LCB if not yet.
* If it fail, we may well be in the sh*t. :)
*/
lp = sym_alloc_lcb(np, device->id, device->lun);
if (!lp) {
device->queue_depth = 1;
continue;
}
/*
* Get user flags.
*/
lp->curr_flags = lp->user_flags;
/*
* Select queue depth from driver setup.
* Donnot use more than configured by user.
* Use at least 2.
* Donnot use more than our maximum.
*/
reqtags = device_queue_depth(np, device->id, device->lun);
if (reqtags > tp->usrtags)
reqtags = tp->usrtags;
if (!device->tagged_supported)
reqtags = 0;
#if 1 /* Avoid to locally queue commands for no good reasons */
if (reqtags > SYM_CONF_MAX_TAG)
reqtags = SYM_CONF_MAX_TAG;
device->queue_depth = reqtags ? reqtags : 2;
#else
device->queue_depth = reqtags ? SYM_CONF_MAX_TAG : 2;
#endif
lp->s.scdev_depth = device->queue_depth;
sym_tune_dev_queuing(np, device->id, device->lun, reqtags);
}
}
/*
* Linux entry point for info() function
*/
const char *sym53c8xx_info (struct Scsi_Host *host)
{
return sym_driver_name();
}
#ifdef SYM_LINUX_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 sym_usercmd() function.
*/
#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
struct sym_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_SETWIDE 14
#define UC_SETFLAG 15
#define UC_SETVERBOSE 17
#define UC_RESETDEV 18
#define UC_CLEARDEV 19
static void sym_exec_user_command (hcb_p np, struct sym_usrcmd *uc)
{
tcb_p tp;
int t, l;
switch (uc->cmd) {
case 0: return;
#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
case UC_SETDEBUG:
sym_debug_flags = uc->data;
break;
#endif
case UC_SETVERBOSE:
np->verbose = uc->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 6 times.
*/
for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
if (!((uc->target >> t) & 1))
continue;
tp = &np->target[t];
switch (uc->cmd) {
case UC_SETSYNC:
if (!uc->data || uc->data >= 255) {
tp->tinfo.goal.options = 0;
tp->tinfo.goal.offset = 0;
break;
}
if (uc->data <= 9 && np->minsync_dt) {
if (uc->data < np->minsync_dt)
uc->data = np->minsync_dt;
tp->tinfo.goal.options = PPR_OPT_DT;
tp->tinfo.goal.width = 1;
tp->tinfo.goal.period = uc->data;
tp->tinfo.goal.offset = np->maxoffs_dt;
}
else {
if (uc->data < np->minsync)
uc->data = np->minsync;
tp->tinfo.goal.options = 0;
tp->tinfo.goal.period = uc->data;
tp->tinfo.goal.offset = np->maxoffs;
}
break;
case UC_SETWIDE:
tp->tinfo.goal.width = uc->data ? 1 : 0;
break;
case UC_SETTAGS:
for (l = 0; l < SYM_CONF_MAX_LUN; l++)
sym_tune_dev_queuing(np, t,l, uc->data);
break;
case UC_RESETDEV:
tp->to_reset = 1;
np->istat_sem = SEM;
OUTB (nc_istat, SIGP|SEM);
break;
case UC_CLEARDEV:
for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
lcb_p lp = sym_lp(np, tp, l);
if (lp) lp->to_clear = 1;
}
np->istat_sem = SEM;
OUTB (nc_istat, SIGP|SEM);
break;
case UC_SETFLAG:
tp->usrflags = uc->data;
break;
}
}
break;
}
}
#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 sym_user_command(hcb_p np, char *buffer, int length)
{
char *ptr = buffer;
int len = length;
struct sym_usrcmd cmd, *uc = &cmd;
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, "setverbose")) != 0)
uc->cmd = UC_SETVERBOSE;
else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
uc->cmd = UC_SETWIDE;
#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
uc->cmd = UC_SETDEBUG;
#endif
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("sym_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("sym_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("sym_user_command: data=%ld\n", uc->data);
#endif
break;
#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
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, "scatter")))
uc->data |= DEBUG_SCATTER;
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 if ((arg_len = is_keyword(ptr, len, "pointer")))
uc->data |= DEBUG_POINTER;
else
return -EINVAL;
ptr += arg_len; len -= arg_len;
}
#ifdef DEBUG_PROC_INFO
printk("sym_user_command: data=%ld\n", uc->data);
#endif
break;
#endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
case UC_SETFLAG:
while (len > 0) {
SKIP_SPACES(1);
if ((arg_len = is_keyword(ptr, len, "no_disc")))
uc->data &= ~SYM_DISC_ENABLED;
else
return -EINVAL;
ptr += arg_len; len -= arg_len;
}
break;
default:
break;
}
if (len)
return -EINVAL;
else {
long flags;
SYM_LOCK_HCB(np, flags);
sym_exec_user_command (np, uc);
SYM_UNLOCK_HCB(np, flags);
}
return length;
}
#endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
#ifdef SYM_LINUX_USER_INFO_SUPPORT
/*
* Informations through the proc file system.
*/
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 sym_host_info(hcb_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, "Chip " NAME53C "%s, device id 0x%x, "
"revision id 0x%x\n",
np->s.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->s.bus, (np->s.device_fn & 0xf8) >> 3, np->s.device_fn & 7,
#ifdef __sparc__
__irq_itoa(np->s.irq));
#else
(int) np->s.irq);
#endif
copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
(int) (np->minsync_dt ? np->minsync_dt : np->minsync),
np->maxwide ? "Wide" : "Narrow",
np->minsync_dt ? ", DT capable" : "");
copy_info(&info, "Max. started commands %d, "
"max. commands per LUN %d\n",
SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
return info.pos > info.offset? info.pos - info.offset : 0;
}
#endif /* SYM_LINUX_USER_INFO_SUPPORT */
/*
* Entry point of the scsi proc fs of the driver.
* - func = 0 means read (returns adapter infos)
* - func = 1 means write (not yet merget from sym53c8xx)
*/
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;
hcb_p np = 0;
int retv;
for (host = first_host; host; host = host->next) {
if (host->hostt != first_host->hostt)
continue;
if (host->host_no == hostno) {
host_data = (struct host_data *) host->hostdata;
np = host_data->ncb;
break;
}
}
if (!np)
return -EINVAL;
if (func) {
#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
retv = sym_user_command(np, buffer, length);
#else
retv = -EINVAL;
#endif
}
else {
if (start)
*start = buffer;
#ifdef SYM_LINUX_USER_INFO_SUPPORT
retv = sym_host_info(np, buffer, offset, length);
#else
retv = -EINVAL;
#endif
}
return retv;
}
#endif /* SYM_LINUX_PROC_INFO_SUPPORT */
/*
* Free controller resources.
*/
static void sym_free_resources(hcb_p np)
{
/*
* Free O/S specific resources.
*/
if (np->s.irq)
free_irq(np->s.irq, np);
if (np->s.io_port)
release_region(np->s.io_port, np->s.io_ws);
#ifndef SYM_OPT_NO_BUS_MEMORY_MAPPING
if (np->s.mmio_va)
pci_unmap_mem(np->s.mmio_va, np->s.io_ws);
if (np->s.ram_va)
pci_unmap_mem(np->s.ram_va, np->ram_ws);
#endif
/*
* Free O/S independant resources.
*/
sym_hcb_free(np);
sym_mfree_dma(np, sizeof(*np), "HCB");
}
/*
* Ask/tell the system about DMA addressing.
*/
#ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
static int sym_setup_bus_dma_mask(hcb_p np)
{
#if LINUX_VERSION_CODE < LinuxVersionCode(2,4,3)
if (!pci_dma_supported(np->s.device, 0xffffffffUL))
goto out_err32;
#else
#if SYM_CONF_DMA_ADDRESSING_MODE == 0
if (pci_set_dma_mask(np->s.device, 0xffffffffUL))
goto out_err32;
#else
#if SYM_CONF_DMA_ADDRESSING_MODE == 1
#define PciDmaMask 0xffffffffff
#elif SYM_CONF_DMA_ADDRESSING_MODE == 2
#define PciDmaMask 0xffffffffffffffff
#endif
if (np->features & FE_DAC) {
if (!pci_set_dma_mask(np->s.device, PciDmaMask)) {
np->use_dac = 1;
printf_info("%s: using 64 bit DMA addressing\n",
sym_name(np));
}
else {
if (!pci_set_dma_mask(np->s.device, 0xffffffffUL))
goto out_err32;
}
}
#undef PciDmaMask
#endif
#endif
return 0;
out_err32:
printf_warning("%s: 32 BIT DMA ADDRESSING NOT SUPPORTED\n",
sym_name(np));
return -1;
}
#endif /* SYM_LINUX_DYNAMIC_DMA_MAPPING */
/*
* 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
sym_attach (Scsi_Host_Template *tpnt, int unit, sym_device *dev)
{
struct host_data *host_data;
hcb_p np = 0;
struct Scsi_Host *instance = 0;
u_long flags = 0;
sym_nvram *nvram = dev->nvram;
struct sym_fw *fw;
printk(KERN_INFO
"sym%d: <%s> rev 0x%x on pci bus %d device %d function %d "
#ifdef __sparc__
"irq %s\n",
#else
"irq %d\n",
#endif
unit, dev->chip.name, dev->chip.revision_id,
dev->s.bus, (dev->s.device_fn & 0xf8) >> 3,
dev->s.device_fn & 7,
#ifdef __sparc__
__irq_itoa(dev->s.irq));
#else
dev->s.irq);
#endif
/*
* Get the firmware for this chip.
*/
fw = sym_find_firmware(&dev->chip);
if (!fw)
goto attach_failed;
/*
* Allocate host_data structure
*/
if (!(instance = scsi_register(tpnt, sizeof(*host_data))))
goto attach_failed;
host_data = (struct host_data *) instance->hostdata;
/*
* Allocate immediately the host control block,
* since we are only expecting to succeed. :)
* We keep track in the HCB of all the resources that
* are to be released on error.
*/
#ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
np = __sym_calloc_dma(dev->pdev, sizeof(*np), "HCB");
if (np) {
np->s.device = dev->pdev;
np->bus_dmat = dev->pdev; /* Result in 1 DMA pool per HBA */
}
else
goto attach_failed;
#else
np = sym_calloc_dma(sizeof(*np), "HCB");
if (!np)
goto attach_failed;
#endif
host_data->ncb = np;
np->s.host = instance;
SYM_INIT_LOCK_HCB(np);
/*
* Copy some useful infos to the HCB.
*/
np->hcb_ba = vtobus(np);
np->verbose = sym_driver_setup.verbose;
np->s.device = dev->pdev;
np->s.unit = unit;
np->device_id = dev->chip.device_id;
np->revision_id = dev->chip.revision_id;
np->s.bus = dev->s.bus;
np->s.device_fn = dev->s.device_fn;
np->features = dev->chip.features;
np->clock_divn = dev->chip.nr_divisor;
np->maxoffs = dev->chip.offset_max;
np->maxburst = dev->chip.burst_max;
np->myaddr = dev->host_id;
/*
* Edit its name.
*/
strncpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name)-1);
sprintf(np->s.inst_name, "sym%d", np->s.unit);
/*
* Ask/tell the system about DMA addressing.
*/
#ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
if (sym_setup_bus_dma_mask(np))
goto attach_failed;
#endif
/*
* Try to map the controller chip to
* virtual and physical memory.
*/
np->mmio_ba = (u32)dev->s.base;
np->s.io_ws = (np->features & FE_IO256)? 256 : 128;
#ifndef SYM_CONF_IOMAPPED
np->s.mmio_va = pci_map_mem(dev->s.base_c, np->s.io_ws);
if (!np->s.mmio_va) {
printf_err("%s: can't map PCI MMIO region\n", sym_name(np));
goto attach_failed;
}
else if (sym_verbose > 1)
printf_info("%s: using memory mapped IO\n", sym_name(np));
#endif /* !defined SYM_CONF_IOMAPPED */
/*
* Try to map the controller chip into iospace.
*/
if (dev->s.io_port) {
request_region(dev->s.io_port, np->s.io_ws, NAME53C8XX);
np->s.io_port = dev->s.io_port;
}
/*
* Map on-chip RAM if present and supported.
*/
if (!(np->features & FE_RAM))
dev->s.base_2 = 0;
if (dev->s.base_2) {
np->ram_ba = (u32)dev->s.base_2;
if (np->features & FE_RAM8K)
np->ram_ws = 8192;
else
np->ram_ws = 4096;
#ifndef SYM_OPT_NO_BUS_MEMORY_MAPPING
np->s.ram_va = pci_map_mem(dev->s.base_2_c, np->ram_ws);
if (!np->s.ram_va) {
printf_err("%s: can't map PCI MEMORY region\n",
sym_name(np));
goto attach_failed;
}
#endif
}
/*
* Perform O/S independant stuff.
*/
if (sym_hcb_attach(np, fw, nvram))
goto attach_failed;
/*
* 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(dev->s.irq, sym53c8xx_intr, SA_SHIRQ,
NAME53C8XX, np)) {
printf_err("%s: request irq %d failure\n",
sym_name(np), dev->s.irq);
goto attach_failed;
}
np->s.irq = dev->s.irq;
/*
* After SCSI devices have been opened, we cannot
* reset the bus safely, so we do it here.
*/
SYM_LOCK_HCB(np, flags);
if (sym_reset_scsi_bus(np, 0)) {
printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
"TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
SYM_UNLOCK_HCB(np, flags);
goto attach_failed;
}
/*
* Initialize some queue headers.
*/
sym_que_init(&np->s.wait_cmdq);
sym_que_init(&np->s.busy_cmdq);
/*
* Start the SCRIPTS.
*/
sym_start_up (np, 1);
/*
* Start the timer daemon
*/
init_timer(&np->s.timer);
np->s.timer.data = (unsigned long) np;
np->s.timer.function = sym53c8xx_timer;
np->s.lasttime=0;
sym_timer (np);
/*
* Done.
*/
if (!first_host)
first_host = instance;
/*
* 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 = SYM_CONF_MAX_LUN;
#ifndef SYM_CONF_IOMAPPED
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,29)
instance->base = (unsigned long) np->s.mmio_va;
#else
instance->base = (char *) np->s.mmio_va;
#endif
#endif
instance->irq = np->s.irq;
instance->unique_id = np->s.io_port;
instance->io_port = np->s.io_port;
instance->n_io_port = np->s.io_ws;
instance->dma_channel = 0;
instance->cmd_per_lun = SYM_CONF_MAX_TAG;
instance->can_queue = (SYM_CONF_MAX_START-2);
instance->sg_tablesize = SYM_CONF_MAX_SG;
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,4,0)
instance->max_cmd_len = 16;
#endif
instance->select_queue_depths = sym53c8xx_select_queue_depths;
instance->highmem_io = 1;
SYM_UNLOCK_HCB(np, flags);
scsi_set_pci_device(instance, dev->pdev);
/*
* Now let the generic SCSI driver
* look for the SCSI devices on the bus ..
*/
return 0;
attach_failed:
if (!instance) return -1;
printf_info("%s: giving up ...\n", sym_name(np));
if (np)
sym_free_resources(np);
scsi_unregister(instance);
return -1;
}
/*
* Detect and try to read SYMBIOS and TEKRAM NVRAM.
*/
#if SYM_CONF_NVRAM_SUPPORT
static void __init sym_get_nvram(sym_device *devp, sym_nvram *nvp)
{
if (!nvp)
return;
devp->nvram = nvp;
devp->device_id = devp->chip.device_id;
nvp->type = 0;
/*
* Get access to chip IO registers
*/
#ifdef SYM_CONF_IOMAPPED
request_region(devp->s.io_port, 128, NAME53C8XX);
#else
devp->s.mmio_va = pci_map_mem(devp->s.base_c, 128);
if (!devp->s.mmio_va)
return;
#endif
/*
* Try to read SYMBIOS|TEKRAM nvram.
*/
(void) sym_read_nvram(devp, nvp);
/*
* Release access to chip IO registers
*/
#ifdef SYM_CONF_IOMAPPED
release_region(devp->s.io_port, 128);
#else
pci_unmap_mem((u_long) devp->s.mmio_va, 128ul);
#endif
}
#endif /* SYM_CONF_NVRAM_SUPPORT */
/*
* Driver setup from the boot command line
*/
#ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
static struct sym_driver_setup
sym_driver_safe_setup __initdata = SYM_LINUX_DRIVER_SAFE_SETUP;
#ifdef MODULE
char *sym53c8xx = 0; /* command line passed by insmod */
MODULE_PARM(sym53c8xx, "s");
#endif
static void __init sym53c8xx_print_driver_setup(void)
{
printf_info (NAME53C8XX ": setup="
"mpar:%d,spar:%d,tags:%d,sync:%d,burst:%d,"
"led:%d,wide:%d,diff:%d,irqm:%d, buschk:%d\n",
sym_driver_setup.pci_parity,
sym_driver_setup.scsi_parity,
sym_driver_setup.max_tag,
sym_driver_setup.min_sync,
sym_driver_setup.burst_order,
sym_driver_setup.scsi_led,
sym_driver_setup.max_wide,
sym_driver_setup.scsi_diff,
sym_driver_setup.irq_mode,
sym_driver_setup.scsi_bus_check);
printf_info (NAME53C8XX ": setup="
"hostid:%d,offs:%d,luns:%d,pcifix:%d,revprob:%d,"
"verb:%d,debug:0x%x,setlle_delay:%d\n",
sym_driver_setup.host_id,
sym_driver_setup.max_offs,
sym_driver_setup.max_lun,
sym_driver_setup.pci_fix_up,
sym_driver_setup.reverse_probe,
sym_driver_setup.verbose,
sym_driver_setup.debug,
sym_driver_setup.settle_delay);
#ifdef DEBUG_2_0_X
MDELAY(5000);
#endif
};
#define OPT_PCI_PARITY 1
#define OPT_SCSI_PARITY 2
#define OPT_MAX_TAG 3
#define OPT_MIN_SYNC 4
#define OPT_BURST_ORDER 5
#define OPT_SCSI_LED 6
#define OPT_MAX_WIDE 7
#define OPT_SCSI_DIFF 8
#define OPT_IRQ_MODE 9
#define OPT_SCSI_BUS_CHECK 10
#define OPT_HOST_ID 11
#define OPT_MAX_OFFS 12
#define OPT_MAX_LUN 13
#define OPT_PCI_FIX_UP 14
#define OPT_REVERSE_PROBE 15
#define OPT_VERBOSE 16
#define OPT_DEBUG 17
#define OPT_SETTLE_DELAY 18
#define OPT_USE_NVRAM 19
#define OPT_EXCLUDE 20
#define OPT_SAFE_SETUP 21
static char setup_token[] __initdata =
"mpar:" "spar:"
"tags:" "sync:"
"burst:" "led:"
"wide:" "diff:"
"irqm:" "buschk:"
"hostid:" "offset:"
"luns:" "pcifix:"
"revprob:" "verb:"
"debug:" "settle:"
"nvram:" "excl:"
"safe:"
;
#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;
}
#endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
int __init sym53c8xx_setup(char *str)
{
#ifdef SYM_LINUX_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_MAX_TAG:
sym_driver_setup.max_tag = val;
if (!(pe && *pe == '/'))
break;
i = 0;
while (*pe && *pe != ARG_SEP &&
i < sizeof(sym_driver_setup.tag_ctrl)-1) {
sym_driver_setup.tag_ctrl[i++] = *pe++;
}
sym_driver_setup.tag_ctrl[i] = '\0';
break;
case OPT_SAFE_SETUP:
memcpy(&sym_driver_setup, &sym_driver_safe_setup,
sizeof(sym_driver_setup));
break;
case OPT_EXCLUDE:
if (xi < 8)
sym_driver_setup.excludes[xi++] = val;
break;
#define __SIMPLE_OPTION(NAME, name) \
case OPT_ ## NAME : \
sym_driver_setup.name = val;\
break;
__SIMPLE_OPTION(PCI_PARITY, pci_parity)
__SIMPLE_OPTION(SCSI_PARITY, scsi_parity)
__SIMPLE_OPTION(MIN_SYNC, min_sync)
__SIMPLE_OPTION(BURST_ORDER, burst_order)
__SIMPLE_OPTION(SCSI_LED, scsi_led)
__SIMPLE_OPTION(MAX_WIDE, max_wide)
__SIMPLE_OPTION(SCSI_DIFF, scsi_diff)
__SIMPLE_OPTION(IRQ_MODE, irq_mode)
__SIMPLE_OPTION(SCSI_BUS_CHECK, scsi_bus_check)
__SIMPLE_OPTION(HOST_ID, host_id)
__SIMPLE_OPTION(MAX_OFFS, max_offs)
__SIMPLE_OPTION(MAX_LUN, max_lun)
__SIMPLE_OPTION(PCI_FIX_UP, pci_fix_up)
__SIMPLE_OPTION(REVERSE_PROBE, reverse_probe)
__SIMPLE_OPTION(VERBOSE, verbose)
__SIMPLE_OPTION(DEBUG, debug)
__SIMPLE_OPTION(SETTLE_DELAY, settle_delay)
__SIMPLE_OPTION(USE_NVRAM, use_nvram)
#undef __SIMPLE_OPTION
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 /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
return 1;
}
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,13)
#ifndef MODULE
__setup("sym53c8xx=", sym53c8xx_setup);
#endif
#endif
#ifdef SYM_CONF_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
*/
#ifndef SYM_CONF_MAX_PQS_BUS
#define SYM_CONF_MAX_PQS_BUS 16
#endif
static int pqs_bus[SYM_CONF_MAX_PQS_BUS] __initdata = { 0 };
static void __init sym_detect_pqs_pds(void)
{
short index;
pcidev_t dev = PCIDEV_NULL;
for(index=0; index < SYM_CONF_MAX_PQS_BUS; index++) {
u_char tmp;
dev = pci_find_device(0x101a, 0x0009, dev);
if (dev == PCIDEV_NULL) {
pqs_bus[index] = -1;
break;
}
printf_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 /* SYM_CONF_PQS_PDS_SUPPORT */
/*
* 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, sym_device *device)
{
u_short vendor_id, device_id, command, status_reg;
u_char cache_line_size;
u_char suggested_cache_line_size = 0;
u_char pci_fix_up = SYM_SETUP_PCI_FIX_UP;
u_char revision;
u_int irq;
u_long base, base_2, base_io;
u_long base_c, base_2_c, io_port;
int i;
sym_chip *chip;
/* Choose some short name for this device */
sprintf(device->s.inst_name, "sym.%d.%d.%d",
PciBusNumber(pdev),
(int) (PciDeviceFn(pdev) & 0xf8) >> 3,
(int) (PciDeviceFn(pdev) & 7));
/*
* Read needed minimal info from the PCI config space.
*/
vendor_id = PciVendorId(pdev);
device_id = PciDeviceId(pdev);
irq = PciIrqLine(pdev);
i = pci_get_base_address(pdev, 0, &base_io);
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);
io_port &= PCI_BASE_ADDRESS_IO_MASK;
base &= PCI_BASE_ADDRESS_MEM_MASK;
base_2 &= PCI_BASE_ADDRESS_MEM_MASK;
pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
/*
* If user excluded this chip, donnot initialize it.
*/
if (base_io) {
for (i = 0 ; i < 8 ; i++) {
if (sym_driver_setup.excludes[i] == base_io)
return -1;
}
}
/*
* Leave here if another driver attached the chip.
*/
if (io_port && check_region (io_port, 128)) {
printf_info("%s: IO region 0x%lx[0..127] is in use\n",
sym_name(device), (long) io_port);
return -1;
}
/*
* Check if the chip is supported.
*/
chip = sym_lookup_pci_chip_table(device_id, revision);
if (!chip) {
printf_info("%s: device not supported\n", sym_name(device));
return -1;
}
/*
* Check if the chip has been assigned resources we need.
*/
#ifdef SYM_CONF_IOMAPPED
if (!io_port) {
printf_info("%s: IO base address disabled.\n",
sym_name(device));
return -1;
}
#else
if (!base) {
printf_info("%s: MMIO base address disabled.\n",
sym_name(device));
return -1;
}
#endif
/*
* Ignore Symbios chips controlled by various RAID controllers.
* These controllers set value 0x52414944 at RAM end - 16.
*/
#if defined(__i386__) && !defined(SYM_OPT_NO_BUS_MEMORY_MAPPING)
if (base_2_c) {
unsigned int ram_size, ram_val;
u_long ram_ptr;
if (chip->features & FE_RAM8K)
ram_size = 8192;
else
ram_size = 4096;
ram_ptr = pci_map_mem(base_2_c, ram_size);
if (ram_ptr) {
ram_val = readl_raw(ram_ptr + ram_size - 16);
pci_unmap_mem(ram_ptr, ram_size);
if (ram_val == 0x52414944) {
printf_info("%s: not initializing, "
"driven by RAID controller.\n",
sym_name(device));
return -1;
}
}
}
#endif /* i386 and PCI MEMORY accessible */
/*
* Copy the chip description to our device structure,
* so we can make it match the actual device and options.
*/
bcopy(chip, &device->chip, sizeof(device->chip));
device->chip.revision_id = revision;
/*
* Read additionnal info from the configuration space.
*/
pci_read_config_word(pdev, PCI_COMMAND, &command);
pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
/*
* Enable missing capabilities in the PCI COMMAND register.
*/
#ifdef SYM_CONF_IOMAPPED
#define PCI_COMMAND_BITS_TO_ENABLE (PCI_COMMAND_IO | \
PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_PARITY)
#else
#define PCI_COMMAND_BITS_TO_ENABLE \
(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_PARITY)
#endif
if ((command & PCI_COMMAND_BITS_TO_ENABLE)
!= PCI_COMMAND_BITS_TO_ENABLE) {
printf_info("%s: setting%s%s%s%s...\n", sym_name(device),
(command & PCI_COMMAND_IO) ? "" : " PCI_COMMAND_IO",
(command & PCI_COMMAND_MEMORY) ? "" : " PCI_COMMAND_MEMORY",
(command & PCI_COMMAND_MASTER) ? "" : " PCI_COMMAND_MASTER",
(command & PCI_COMMAND_PARITY) ? "" : " PCI_COMMAND_PARITY");
command |= PCI_COMMAND_BITS_TO_ENABLE;
pci_write_config_word(pdev, PCI_COMMAND, command);
}
#undef PCI_COMMAND_BITS_TO_ENABLE
/*
* If cache line size is not configured, suggest
* a value for well known CPUs.
*/
#if defined(__i386__) && !defined(MODULE)
if (!cache_line_size && boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) {
switch(boot_cpu_data.x86) {
case 4: suggested_cache_line_size = 4; break;
case 6: if (boot_cpu_data.x86_model > 8) break;
case 5: suggested_cache_line_size = 8; break;
}
}
#endif /* __i386__ */
/*
* 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 < 0x4) {
chip->features |= (FE_WRIE | FE_CLSE);
pci_fix_up |= 3; /* Force appropriate PCI fix-up */
}
#ifdef SYM_CONF_PCI_FIX_UP
/*
* 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);
printf_info("%s: PCI_CACHE_LINE_SIZE set to %d.\n",
sym_name(device), cache_line_size);
}
if ((pci_fix_up & 2) && cache_line_size &&
(chip->features & FE_WRIE) && !(command & PCI_COMMAND_INVALIDATE)) {
printf_info("%s: setting PCI_COMMAND_INVALIDATE.\n",
sym_name(device));
command |= PCI_COMMAND_INVALIDATE;
pci_write_config_word(pdev, PCI_COMMAND, command);
}
#endif /* SYM_CONF_PCI_FIX_UP */
/*
* 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.
*/
pci_read_config_word(pdev, PCI_STATUS, &status_reg);
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);
}
}
/*
* Initialise device structure with items required by sym_attach.
*/
device->pdev = pdev;
device->s.bus = PciBusNumber(pdev);
device->s.device_fn = PciDeviceFn(pdev);
device->s.base = base;
device->s.base_2 = base_2;
device->s.base_c = base_c;
device->s.base_2_c = base_2_c;
device->s.io_port = io_port;
device->s.irq = irq;
device->attach_done = 0;
return 0;
}
/*
* List of supported NCR chip ids
*/
static u_short sym_chip_ids[] __initdata = {
PCI_ID_SYM53C810,
PCI_ID_SYM53C815,
PCI_ID_SYM53C825,
PCI_ID_SYM53C860,
PCI_ID_SYM53C875,
PCI_ID_SYM53C875_2,
PCI_ID_SYM53C885,
PCI_ID_SYM53C875A,
PCI_ID_SYM53C895,
PCI_ID_SYM53C896,
PCI_ID_SYM53C895A,
PCI_ID_LSI53C1510D,
PCI_ID_LSI53C1010,
PCI_ID_LSI53C1010_2
};
/*
* 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 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;
sym_device *devtbl, *devp;
sym_nvram nvram;
#if SYM_CONF_NVRAM_SUPPORT
sym_nvram nvram0, *nvp;
#endif
/*
* PCI is required.
*/
if (!pci_present())
return 0;
/*
* Initialize driver general stuff.
*/
#ifdef SYM_LINUX_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
#ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
#ifdef MODULE
if (sym53c8xx)
sym53c8xx_setup(sym53c8xx);
#endif
#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
sym_debug_flags = sym_driver_setup.debug;
#endif
if (boot_verbose >= 2)
sym53c8xx_print_driver_setup();
#endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
/*
* 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 = sym_calloc(PAGE_SIZE, "DEVTBL");
if (!devtbl)
return 0;
/*
* Detect all NCR PQS/PDS memory controllers.
*/
#ifdef SYM_CONF_PQS_PDS_SUPPORT
sym_detect_pqs_pds();
#endif
/*
* Detect all 53c8xx hosts.
* Save the first Symbios NVRAM content if any
* for the boot order.
*/
chips = sizeof(sym_chip_ids) / sizeof(sym_chip_ids[0]);
hosts = PAGE_SIZE / sizeof(*devtbl);
#if SYM_CONF_NVRAM_SUPPORT
nvp = (sym_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 = sym_driver_setup.reverse_probe ? chips - 1 - j : j;
pcidev = pci_find_device(PCI_VENDOR_ID_NCR, sym_chip_ids[i],
pcidev);
if (pcidev == PCIDEV_NULL) {
++j;
continue;
}
/* This one is guaranteed by AC to do nothing :-) */
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].s.bus == PciBusNumber(pcidev) &&
devtbl[i].s.device_fn == PciDeviceFn(pcidev))
break;
}
if (i != count) /* Ignore this device if we already have it */
continue;
devp = &devtbl[count];
devp->host_id = SYM_SETUP_HOST_ID;
devp->attach_done = 0;
if (sym53c8xx_pci_init(tpnt, pcidev, devp)) {
continue;
}
++count;
#if SYM_CONF_NVRAM_SUPPORT
if (nvp) {
sym_get_nvram(devp, nvp);
switch(nvp->type) {
case SYM_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 SYM_TEKRAM_NVRAM:
msg = "with Tekram NVRAM";
break;
}
}
#endif
#ifdef SYM_CONF_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 < SYM_CONF_MAX_PQS_BUS && pqs_bus[i] != -1; i++) {
u_char tmp;
if (pqs_bus[i] == PciBusNumber(pcidev)) {
pci_read_config_byte(pcidev, 0x84, &tmp);
devp->pqs_pds = 1;
devp->host_id = tmp;
break;
}
}
if (devp->pqs_pds)
msg = "(NCR PQS/PDS)";
#endif
if (boot_verbose)
printf_info("%s: 53c%s detected %s\n",
sym_name(devp), 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.
*/
#if SYM_CONF_NVRAM_SUPPORT
if (!nvp || nvram0.type != SYM_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->s.device_fn ||
h->bus_nr != devp->s.bus ||
h->device_id != devp->chip.device_id)
continue;
if (devp->attach_done)
continue;
if (h->flags & SYMBIOS_INIT_SCAN_AT_BOOT) {
sym_get_nvram(devp, nvp);
if (!sym_attach (tpnt, attach_count, devp))
attach_count++;
}
else if (!(sym_driver_setup.use_nvram & 0x80))
printf_info(
"%s: 53c%s state OFF thus not attached\n",
sym_name(devp), 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) {
devp->nvram = &nvram;
nvram.type = 0;
#if SYM_CONF_NVRAM_SUPPORT
sym_get_nvram(devp, nvp);
#endif
if (!sym_attach (tpnt, attach_count, devp))
attach_count++;
}
}
sym_mfree(devtbl, PAGE_SIZE, "DEVTBL");
return attach_count;
}
#ifdef MODULE
/*
* Linux release module stuff.
*
* Called before unloading the module.
* Detach the host.
* We have to free resources and halt the NCR chip.
*
*/
static int sym_detach(hcb_p np)
{
printk("%s: detaching ...\n", sym_name(np));
/*
* Try to delete the timer.
* In the unlikely situation where this failed,
* try to synchronize with the timer handler.
*/
#if LINUX_VERSION_CODE < LinuxVersionCode(2, 4, 0)
np->s.release_stage = 1;
if (!del_timer(&np->s.timer)) {
int i = 1000;
int k = 1;
while (1) {
u_long flags;
SYM_LOCK_HCB(np, flags);
k = np->s.release_stage;
SYM_UNLOCK_HCB(np, flags);
if (k == 2 || !--i)
break;
MDELAY(5);
}
if (!i)
printk("%s: failed to kill timer!\n", sym_name(np));
}
np->s.release_stage = 2;
#else
(void)del_timer_sync(&np->s.timer);
#endif
/*
* Reset NCR chip.
* We should use sym_soft_reset(), but we donnot want to do
* so, since we may not be safe if interrupts occur.
*/
printk("%s: resetting chip\n", sym_name(np));
OUTB (nc_istat, SRST);
UDELAY (10);
OUTB (nc_istat, 0);
/*
* Free host resources
*/
sym_free_resources(np);
return 1;
}
int sym53c8xx_release(struct Scsi_Host *host)
{
sym_detach(((struct host_data *) host->hostdata)->ncb);
return 0;
}
#endif /* MODULE */
/*
* For bigots to keep silent. :)
*/
#ifdef MODULE_LICENSE
MODULE_LICENSE("Dual BSD/GPL");
#endif
/*
* Driver host template.
*/
#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