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kernel / pub / scm / linux / kernel / git / davem / netdev-vger-cvs / f5dea6e62a3e557d78412b139de0fad38d82741c / . / drivers / net / pcnet32.c
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/* pcnet32.c: An AMD PCnet32 ethernet driver for linux. */
/*
* Copyright 1996-1999 Thomas Bogendoerfer
*
* Derived from the lance driver written 1993,1994,1995 by Donald Becker.
*
* Copyright 1993 United States Government as represented by the
* Director, National Security Agency.
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* This driver is for PCnet32 and PCnetPCI based ethercards
*/
/**************************************************************************
* 23 Oct, 2000.
* Fixed a few bugs, related to running the controller in 32bit mode.
*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
*
*************************************************************************/
static const char *version = "pcnet32.c:v1.25kf 26.9.1999 tsbogend@alpha.franken.de\n";
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/crc32.h>
#include <asm/bitops.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
static unsigned int pcnet32_portlist[] __initdata = {0x300, 0x320, 0x340, 0x360, 0};
/*
* PCI device identifiers for "new style" Linux PCI Device Drivers
*/
static struct pci_device_id pcnet32_pci_tbl[] __devinitdata = {
{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE_HOME, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ 0, }
};
static int pcnet32_debug = 1;
static int tx_start = 1; /* Mapping -- 0:20, 1:64, 2:128, 3:~220 (depends on chip vers) */
static struct net_device *pcnet32_dev;
static const int max_interrupt_work = 80;
static const int rx_copybreak = 200;
#define PCNET32_PORT_AUI 0x00
#define PCNET32_PORT_10BT 0x01
#define PCNET32_PORT_GPSI 0x02
#define PCNET32_PORT_MII 0x03
#define PCNET32_PORT_PORTSEL 0x03
#define PCNET32_PORT_ASEL 0x04
#define PCNET32_PORT_100 0x40
#define PCNET32_PORT_FD 0x80
#define PCNET32_DMA_MASK 0xffffffff
/*
* table to translate option values from tulip
* to internal options
*/
static unsigned char options_mapping[] = {
PCNET32_PORT_ASEL, /* 0 Auto-select */
PCNET32_PORT_AUI, /* 1 BNC/AUI */
PCNET32_PORT_AUI, /* 2 AUI/BNC */
PCNET32_PORT_ASEL, /* 3 not supported */
PCNET32_PORT_10BT | PCNET32_PORT_FD, /* 4 10baseT-FD */
PCNET32_PORT_ASEL, /* 5 not supported */
PCNET32_PORT_ASEL, /* 6 not supported */
PCNET32_PORT_ASEL, /* 7 not supported */
PCNET32_PORT_ASEL, /* 8 not supported */
PCNET32_PORT_MII, /* 9 MII 10baseT */
PCNET32_PORT_MII | PCNET32_PORT_FD, /* 10 MII 10baseT-FD */
PCNET32_PORT_MII, /* 11 MII (autosel) */
PCNET32_PORT_10BT, /* 12 10BaseT */
PCNET32_PORT_MII | PCNET32_PORT_100, /* 13 MII 100BaseTx */
PCNET32_PORT_MII | PCNET32_PORT_100 | PCNET32_PORT_FD, /* 14 MII 100BaseTx-FD */
PCNET32_PORT_ASEL /* 15 not supported */
};
#define MAX_UNITS 8
static int options[MAX_UNITS];
static int full_duplex[MAX_UNITS];
/*
* Theory of Operation
*
* This driver uses the same software structure as the normal lance
* driver. So look for a verbose description in lance.c. The differences
* to the normal lance driver is the use of the 32bit mode of PCnet32
* and PCnetPCI chips. Because these chips are 32bit chips, there is no
* 16MB limitation and we don't need bounce buffers.
*/
/*
* History:
* v0.01: Initial version
* only tested on Alpha Noname Board
* v0.02: changed IRQ handling for new interrupt scheme (dev_id)
* tested on a ASUS SP3G
* v0.10: fixed an odd problem with the 79C974 in a Compaq Deskpro XL
* looks like the 974 doesn't like stopping and restarting in a
* short period of time; now we do a reinit of the lance; the
* bug was triggered by doing ifconfig eth0 <ip> broadcast <addr>
* and hangs the machine (thanks to Klaus Liedl for debugging)
* v0.12: by suggestion from Donald Becker: Renamed driver to pcnet32,
* made it standalone (no need for lance.c)
* v0.13: added additional PCI detecting for special PCI devices (Compaq)
* v0.14: stripped down additional PCI probe (thanks to David C Niemi
* and sveneric@xs4all.nl for testing this on their Compaq boxes)
* v0.15: added 79C965 (VLB) probe
* added interrupt sharing for PCI chips
* v0.16: fixed set_multicast_list on Alpha machines
* v0.17: removed hack from dev.c; now pcnet32 uses ethif_probe in Space.c
* v0.19: changed setting of autoselect bit
* v0.20: removed additional Compaq PCI probe; there is now a working one
* in arch/i386/bios32.c
* v0.21: added endian conversion for ppc, from work by cort@cs.nmt.edu
* v0.22: added printing of status to ring dump
* v0.23: changed enet_statistics to net_devive_stats
* v0.90: added multicast filter
* added module support
* changed irq probe to new style
* added PCnetFast chip id
* added fix for receive stalls with Intel saturn chipsets
* added in-place rx skbs like in the tulip driver
* minor cleanups
* v0.91: added PCnetFast+ chip id
* back port to 2.0.x
* v1.00: added some stuff from Donald Becker's 2.0.34 version
* added support for byte counters in net_dev_stats
* v1.01: do ring dumps, only when debugging the driver
* increased the transmit timeout
* v1.02: fixed memory leak in pcnet32_init_ring()
* v1.10: workaround for stopped transmitter
* added port selection for modules
* detect special T1/E1 WAN card and setup port selection
* v1.11: fixed wrong checking of Tx errors
* v1.20: added check of return value kmalloc (cpeterso@cs.washington.edu)
* added save original kmalloc addr for freeing (mcr@solidum.com)
* added support for PCnetHome chip (joe@MIT.EDU)
* rewritten PCI card detection
* added dwio mode to get driver working on some PPC machines
* v1.21: added mii selection and mii ioctl
* v1.22: changed pci scanning code to make PPC people happy
* fixed switching to 32bit mode in pcnet32_open() (thanks
* to Michael Richard <mcr@solidum.com> for noticing this one)
* added sub vendor/device id matching (thanks again to
* Michael Richard <mcr@solidum.com>)
* added chip id for 79c973/975 (thanks to Zach Brown <zab@zabbo.net>)
* v1.23 fixed small bug, when manual selecting MII speed/duplex
* v1.24 Applied Thomas' patch to use TxStartPoint and thus decrease TxFIFO
* underflows. Added tx_start_pt module parameter. Increased
* TX_RING_SIZE from 16 to 32. Added #ifdef'd code to use DXSUFLO
* for FAST[+] chipsets. <kaf@fc.hp.com>
* v1.24ac Added SMP spinlocking - Alan Cox <alan@redhat.com>
* v1.25kf Added No Interrupt on successful Tx for some Tx's <kaf@fc.hp.com>
* v1.26 Converted to pci_alloc_consistent, Jamey Hicks / George France
* <jamey@crl.dec.com>
* v1.26p Fix oops on rmmod+insmod; plug i/o resource leak - Paul Gortmaker
*/
/*
* Set the number of Tx and Rx buffers, using Log_2(# buffers).
* Reasonable default values are 4 Tx buffers, and 16 Rx buffers.
* That translates to 2 (4 == 2^^2) and 4 (16 == 2^^4).
*/
#ifndef PCNET32_LOG_TX_BUFFERS
#define PCNET32_LOG_TX_BUFFERS 4
#define PCNET32_LOG_RX_BUFFERS 5
#endif
#define TX_RING_SIZE (1 << (PCNET32_LOG_TX_BUFFERS))
#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
#define TX_RING_LEN_BITS ((PCNET32_LOG_TX_BUFFERS) << 12)
#define RX_RING_SIZE (1 << (PCNET32_LOG_RX_BUFFERS))
#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
#define RX_RING_LEN_BITS ((PCNET32_LOG_RX_BUFFERS) << 4)
#define PKT_BUF_SZ 1544
/* Offsets from base I/O address. */
#define PCNET32_WIO_RDP 0x10
#define PCNET32_WIO_RAP 0x12
#define PCNET32_WIO_RESET 0x14
#define PCNET32_WIO_BDP 0x16
#define PCNET32_DWIO_RDP 0x10
#define PCNET32_DWIO_RAP 0x14
#define PCNET32_DWIO_RESET 0x18
#define PCNET32_DWIO_BDP 0x1C
#define PCNET32_TOTAL_SIZE 0x20
/* The PCNET32 Rx and Tx ring descriptors. */
struct pcnet32_rx_head {
u32 base;
s16 buf_length;
s16 status;
u32 msg_length;
u32 reserved;
};
struct pcnet32_tx_head {
u32 base;
s16 length;
s16 status;
u32 misc;
u32 reserved;
};
/* The PCNET32 32-Bit initialization block, described in databook. */
struct pcnet32_init_block {
u16 mode;
u16 tlen_rlen;
u8 phys_addr[6];
u16 reserved;
u32 filter[2];
/* Receive and transmit ring base, along with extra bits. */
u32 rx_ring;
u32 tx_ring;
};
/* PCnet32 access functions */
struct pcnet32_access {
u16 (*read_csr)(unsigned long, int);
void (*write_csr)(unsigned long, int, u16);
u16 (*read_bcr)(unsigned long, int);
void (*write_bcr)(unsigned long, int, u16);
u16 (*read_rap)(unsigned long);
void (*write_rap)(unsigned long, u16);
void (*reset)(unsigned long);
};
/*
* The first three fields of pcnet32_private are read by the ethernet device
* so we allocate the structure should be allocated by pci_alloc_consistent().
*/
struct pcnet32_private {
/* The Tx and Rx ring entries must be aligned on 16-byte boundaries in 32bit mode. */
struct pcnet32_rx_head rx_ring[RX_RING_SIZE];
struct pcnet32_tx_head tx_ring[TX_RING_SIZE];
struct pcnet32_init_block init_block;
dma_addr_t dma_addr; /* DMA address of beginning of this object, returned by pci_alloc_consistent */
struct pci_dev *pci_dev; /* Pointer to the associated pci device structure */
const char *name;
/* The saved address of a sent-in-place packet/buffer, for skfree(). */
struct sk_buff *tx_skbuff[TX_RING_SIZE];
struct sk_buff *rx_skbuff[RX_RING_SIZE];
dma_addr_t tx_dma_addr[TX_RING_SIZE];
dma_addr_t rx_dma_addr[RX_RING_SIZE];
struct pcnet32_access a;
spinlock_t lock; /* Guard lock */
unsigned int cur_rx, cur_tx; /* The next free ring entry */
unsigned int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */
struct net_device_stats stats;
char tx_full;
int options;
int shared_irq:1, /* shared irq possible */
ltint:1,
#ifdef DO_DXSUFLO
dxsuflo:1, /* disable transmit stop on uflo */
#endif
full_duplex:1, /* full duplex possible */
mii:1; /* mii port available */
struct net_device *next;
};
static int pcnet32_probe_vlbus(int cards_found);
static int pcnet32_probe_pci(struct pci_dev *, const struct pci_device_id *);
static int pcnet32_probe1(unsigned long, unsigned char, int, int, struct pci_dev *);
static int pcnet32_open(struct net_device *);
static int pcnet32_init_ring(struct net_device *);
static int pcnet32_start_xmit(struct sk_buff *, struct net_device *);
static int pcnet32_rx(struct net_device *);
static void pcnet32_tx_timeout (struct net_device *dev);
static void pcnet32_interrupt(int, void *, struct pt_regs *);
static int pcnet32_close(struct net_device *);
static struct net_device_stats *pcnet32_get_stats(struct net_device *);
static void pcnet32_set_multicast_list(struct net_device *);
#ifdef HAVE_PRIVATE_IOCTL
static int pcnet32_mii_ioctl(struct net_device *, struct ifreq *, int);
#endif
enum pci_flags_bit {
PCI_USES_IO=1, PCI_USES_MEM=2, PCI_USES_MASTER=4,
PCI_ADDR0=0x10<<0, PCI_ADDR1=0x10<<1, PCI_ADDR2=0x10<<2, PCI_ADDR3=0x10<<3,
};
struct pcnet32_pci_id_info {
const char *name;
u16 vendor_id, device_id, svid, sdid, flags;
int io_size;
int (*probe1) (unsigned long, unsigned char, int, int, struct pci_dev *);
};
MODULE_DEVICE_TABLE (pci, pcnet32_pci_tbl);
static u16 pcnet32_wio_read_csr (unsigned long addr, int index)
{
outw (index, addr+PCNET32_WIO_RAP);
return inw (addr+PCNET32_WIO_RDP);
}
static void pcnet32_wio_write_csr (unsigned long addr, int index, u16 val)
{
outw (index, addr+PCNET32_WIO_RAP);
outw (val, addr+PCNET32_WIO_RDP);
}
static u16 pcnet32_wio_read_bcr (unsigned long addr, int index)
{
outw (index, addr+PCNET32_WIO_RAP);
return inw (addr+PCNET32_WIO_BDP);
}
static void pcnet32_wio_write_bcr (unsigned long addr, int index, u16 val)
{
outw (index, addr+PCNET32_WIO_RAP);
outw (val, addr+PCNET32_WIO_BDP);
}
static u16 pcnet32_wio_read_rap (unsigned long addr)
{
return inw (addr+PCNET32_WIO_RAP);
}
static void pcnet32_wio_write_rap (unsigned long addr, u16 val)
{
outw (val, addr+PCNET32_WIO_RAP);
}
static void pcnet32_wio_reset (unsigned long addr)
{
inw (addr+PCNET32_WIO_RESET);
}
static int pcnet32_wio_check (unsigned long addr)
{
outw (88, addr+PCNET32_WIO_RAP);
return (inw (addr+PCNET32_WIO_RAP) == 88);
}
static struct pcnet32_access pcnet32_wio = {
pcnet32_wio_read_csr,
pcnet32_wio_write_csr,
pcnet32_wio_read_bcr,
pcnet32_wio_write_bcr,
pcnet32_wio_read_rap,
pcnet32_wio_write_rap,
pcnet32_wio_reset
};
static u16 pcnet32_dwio_read_csr (unsigned long addr, int index)
{
outl (index, addr+PCNET32_DWIO_RAP);
return (inl (addr+PCNET32_DWIO_RDP) & 0xffff);
}
static void pcnet32_dwio_write_csr (unsigned long addr, int index, u16 val)
{
outl (index, addr+PCNET32_DWIO_RAP);
outl (val, addr+PCNET32_DWIO_RDP);
}
static u16 pcnet32_dwio_read_bcr (unsigned long addr, int index)
{
outl (index, addr+PCNET32_DWIO_RAP);
return (inl (addr+PCNET32_DWIO_BDP) & 0xffff);
}
static void pcnet32_dwio_write_bcr (unsigned long addr, int index, u16 val)
{
outl (index, addr+PCNET32_DWIO_RAP);
outl (val, addr+PCNET32_DWIO_BDP);
}
static u16 pcnet32_dwio_read_rap (unsigned long addr)
{
return (inl (addr+PCNET32_DWIO_RAP) & 0xffff);
}
static void pcnet32_dwio_write_rap (unsigned long addr, u16 val)
{
outl (val, addr+PCNET32_DWIO_RAP);
}
static void pcnet32_dwio_reset (unsigned long addr)
{
inl (addr+PCNET32_DWIO_RESET);
}
static int pcnet32_dwio_check (unsigned long addr)
{
outl (88, addr+PCNET32_DWIO_RAP);
return ((inl (addr+PCNET32_DWIO_RAP) & 0xffff) == 88);
}
static struct pcnet32_access pcnet32_dwio = {
pcnet32_dwio_read_csr,
pcnet32_dwio_write_csr,
pcnet32_dwio_read_bcr,
pcnet32_dwio_write_bcr,
pcnet32_dwio_read_rap,
pcnet32_dwio_write_rap,
pcnet32_dwio_reset
};
/* only probes for non-PCI devices, the rest are handled by pci_register_driver via pcnet32_probe_pci*/
static int __init pcnet32_probe_vlbus(int cards_found)
{
unsigned long ioaddr = 0; // FIXME dev ? dev->base_addr: 0;
unsigned int irq_line = 0; // FIXME dev ? dev->irq : 0;
int *port;
printk(KERN_INFO "pcnet32_probe_vlbus: cards_found=%d\n", cards_found);
#ifndef __powerpc__
if (ioaddr > 0x1ff) {
if (check_region(ioaddr, PCNET32_TOTAL_SIZE) == 0)
return pcnet32_probe1(ioaddr, irq_line, 0, 0, NULL);
else
return -ENODEV;
} else
#endif
if (ioaddr != 0)
return -ENXIO;
/* now look for PCnet32 VLB cards */
for (port = pcnet32_portlist; *port; port++) {
unsigned long ioaddr = *port;
if ( check_region(ioaddr, PCNET32_TOTAL_SIZE) == 0) {
/* check if there is really a pcnet chip on that ioaddr */
if ((inb(ioaddr + 14) == 0x57) &&
(inb(ioaddr + 15) == 0x57) &&
(pcnet32_probe1(ioaddr, 0, 0, 0, NULL) == 0))
cards_found++;
}
}
return cards_found ? 0: -ENODEV;
}
static int __devinit
pcnet32_probe_pci(struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int card_idx;
long ioaddr;
int err = 0;
printk(KERN_INFO "pcnet32_probe_pci: found device %#08x.%#08x\n", ent->vendor, ent->device);
if ((err = pci_enable_device(pdev)) < 0) {
printk(KERN_ERR "pcnet32.c: failed to enable device -- err=%d\n", err);
return err;
}
pci_set_master(pdev);
ioaddr = pci_resource_start (pdev, 0);
printk(KERN_INFO " ioaddr=%#08lx resource_flags=%#08lx\n", ioaddr, pci_resource_flags (pdev, 0));
if (!ioaddr) {
printk (KERN_ERR "no PCI IO resources, aborting\n");
return -ENODEV;
}
if (!pci_dma_supported(pdev, PCNET32_DMA_MASK)) {
printk(KERN_ERR "pcnet32.c: architecture does not support 32bit PCI busmaster DMA\n");
return -ENODEV;
}
return pcnet32_probe1(ioaddr, pdev->irq, 1, card_idx, pdev);
}
/* pcnet32_probe1
* Called from both pcnet32_probe_vlbus and pcnet_probe_pci.
* pdev will be NULL when called from pcnet32_probe_vlbus.
*/
static int __devinit
pcnet32_probe1(unsigned long ioaddr, unsigned char irq_line, int shared, int card_idx, struct pci_dev *pdev)
{
struct pcnet32_private *lp;
struct resource *res;
dma_addr_t lp_dma_addr;
int i,media,fdx = 0, mii = 0, fset = 0;
#ifdef DO_DXSUFLO
int dxsuflo = 0;
#endif
int ltint = 0;
int chip_version;
char *chipname;
struct net_device *dev;
struct pcnet32_access *a = NULL;
/* reset the chip */
pcnet32_dwio_reset(ioaddr);
pcnet32_wio_reset(ioaddr);
/* NOTE: 16-bit check is first, otherwise some older PCnet chips fail */
if (pcnet32_wio_read_csr (ioaddr, 0) == 4 && pcnet32_wio_check (ioaddr)) {
a = &pcnet32_wio;
} else {
if (pcnet32_dwio_read_csr (ioaddr, 0) == 4 && pcnet32_dwio_check(ioaddr)) {
a = &pcnet32_dwio;
} else
return -ENODEV;
}
chip_version = a->read_csr (ioaddr, 88) | (a->read_csr (ioaddr,89) << 16);
if (pcnet32_debug > 2)
printk(KERN_INFO " PCnet chip version is %#x.\n", chip_version);
if ((chip_version & 0xfff) != 0x003)
return -ENODEV;
chip_version = (chip_version >> 12) & 0xffff;
switch (chip_version) {
case 0x2420:
chipname = "PCnet/PCI 79C970"; /* PCI */
break;
case 0x2430:
if (shared)
chipname = "PCnet/PCI 79C970"; /* 970 gives the wrong chip id back */
else
chipname = "PCnet/32 79C965"; /* 486/VL bus */
break;
case 0x2621:
chipname = "PCnet/PCI II 79C970A"; /* PCI */
fdx = 1;
break;
case 0x2623:
chipname = "PCnet/FAST 79C971"; /* PCI */
fdx = 1; mii = 1; fset = 1;
ltint = 1;
break;
case 0x2624:
chipname = "PCnet/FAST+ 79C972"; /* PCI */
fdx = 1; mii = 1; fset = 1;
break;
case 0x2625:
chipname = "PCnet/FAST III 79C973"; /* PCI */
fdx = 1; mii = 1;
break;
case 0x2626:
chipname = "PCnet/Home 79C978"; /* PCI */
fdx = 1;
/*
* This is based on specs published at www.amd.com. This section
* assumes that a card with a 79C978 wants to go into 1Mb HomePNA
* mode. The 79C978 can also go into standard ethernet, and there
* probably should be some sort of module option to select the
* mode by which the card should operate
*/
/* switch to home wiring mode */
media = a->read_bcr (ioaddr, 49);
#if 0
if (pcnet32_debug > 2)
printk(KERN_DEBUG "pcnet32: pcnet32 media value %#x.\n", media);
media &= ~3;
media |= 1;
#endif
if (pcnet32_debug > 2)
printk(KERN_DEBUG "pcnet32: pcnet32 media reset to %#x.\n", media);
a->write_bcr (ioaddr, 49, media);
break;
case 0x2627:
chipname = "PCnet/FAST III 79C975"; /* PCI */
fdx = 1; mii = 1;
break;
default:
printk(KERN_INFO "pcnet32: PCnet version %#x, no PCnet32 chip.\n",chip_version);
return -ENODEV;
}
/*
* On selected chips turn on the BCR18:NOUFLO bit. This stops transmit
* starting until the packet is loaded. Strike one for reliability, lose
* one for latency - although on PCI this isnt a big loss. Older chips
* have FIFO's smaller than a packet, so you can't do this.
*/
if(fset)
{
a->write_bcr(ioaddr, 18, (a->read_bcr(ioaddr, 18) | 0x0800));
a->write_csr(ioaddr, 80, (a->read_csr(ioaddr, 80) & 0x0C00) | 0x0c00);
#ifdef DO_DXSUFLO
dxsuflo = 1;
#endif
ltint = 1;
}
dev = init_etherdev(NULL, 0);
if(dev==NULL)
return -ENOMEM;
printk(KERN_INFO "%s: %s at %#3lx,", dev->name, chipname, ioaddr);
/* In most chips, after a chip reset, the ethernet address is read from the
* station address PROM at the base address and programmed into the
* "Physical Address Registers" CSR12-14.
* As a precautionary measure, we read the PROM values and complain if
* they disagree with the CSRs. Either way, we use the CSR values, and
* double check that they are valid.
*/
for (i = 0; i < 3; i++) {
unsigned int val;
val = a->read_csr(ioaddr, i+12) & 0x0ffff;
/* There may be endianness issues here. */
dev->dev_addr[2*i] = val & 0x0ff;
dev->dev_addr[2*i+1] = (val >> 8) & 0x0ff;
}
{
u8 promaddr[6];
for (i = 0; i < 6; i++) {
promaddr[i] = inb(ioaddr + i);
}
if( memcmp( promaddr, dev->dev_addr, 6) )
{
printk(" warning PROM address does not match CSR address\n");
#if defined(__i386__)
printk(KERN_WARNING "%s: Probably a Compaq, using the PROM address of", dev->name);
memcpy(dev->dev_addr, promaddr, 6);
#endif
}
}
/* if the ethernet address is not valid, force to 00:00:00:00:00:00 */
if( !is_valid_ether_addr(dev->dev_addr) )
for (i = 0; i < 6; i++)
dev->dev_addr[i]=0;
for (i = 0; i < 6; i++)
printk(" %2.2x", dev->dev_addr[i] );
if (((chip_version + 1) & 0xfffe) == 0x2624) { /* Version 0x2623 or 0x2624 */
i = a->read_csr(ioaddr, 80) & 0x0C00; /* Check tx_start_pt */
printk("\n" KERN_INFO " tx_start_pt(0x%04x):",i);
switch(i>>10) {
case 0: printk(" 20 bytes,"); break;
case 1: printk(" 64 bytes,"); break;
case 2: printk(" 128 bytes,"); break;
case 3: printk("~220 bytes,"); break;
}
i = a->read_bcr(ioaddr, 18); /* Check Burst/Bus control */
printk(" BCR18(%x):",i&0xffff);
if (i & (1<<5)) printk("BurstWrEn ");
if (i & (1<<6)) printk("BurstRdEn ");
if (i & (1<<7)) printk("DWordIO ");
if (i & (1<<11)) printk("NoUFlow ");
i = a->read_bcr(ioaddr, 25);
printk("\n" KERN_INFO " SRAMSIZE=0x%04x,",i<<8);
i = a->read_bcr(ioaddr, 26);
printk(" SRAM_BND=0x%04x,",i<<8);
i = a->read_bcr(ioaddr, 27);
if (i & (1<<14)) printk("LowLatRx");
}
dev->base_addr = ioaddr;
res = request_region(ioaddr, PCNET32_TOTAL_SIZE, chipname);
if (res == NULL)
return -EBUSY;
/* pci_alloc_consistent returns page-aligned memory, so we do not have to check the alignment */
if ((lp = pci_alloc_consistent(pdev, sizeof(*lp), &lp_dma_addr)) == NULL) {
release_resource(res);
return -ENOMEM;
}
memset(lp, 0, sizeof(*lp));
lp->dma_addr = lp_dma_addr;
lp->pci_dev = pdev;
printk("\n" KERN_INFO "pcnet32: pcnet32_private lp=%p lp_dma_addr=%#08x", lp, lp_dma_addr);
spin_lock_init(&lp->lock);
dev->priv = lp;
lp->name = chipname;
lp->shared_irq = shared;
lp->full_duplex = fdx;
#ifdef DO_DXSUFLO
lp->dxsuflo = dxsuflo;
#endif
lp->ltint = ltint;
lp->mii = mii;
if (options[card_idx] > sizeof (options_mapping))
lp->options = PCNET32_PORT_ASEL;
else
lp->options = options_mapping[options[card_idx]];
if (fdx && !(lp->options & PCNET32_PORT_ASEL) && full_duplex[card_idx])
lp->options |= PCNET32_PORT_FD;
if (a == NULL) {
printk(KERN_ERR "pcnet32: No access methods\n");
pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
release_resource(res);
return -ENODEV;
}
lp->a = *a;
/* detect special T1/E1 WAN card by checking for MAC address */
if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0 && dev->dev_addr[2] == 0x75)
lp->options = PCNET32_PORT_FD | PCNET32_PORT_GPSI;
lp->init_block.mode = le16_to_cpu(0x0003); /* Disable Rx and Tx. */
lp->init_block.tlen_rlen = le16_to_cpu(TX_RING_LEN_BITS | RX_RING_LEN_BITS);
for (i = 0; i < 6; i++)
lp->init_block.phys_addr[i] = dev->dev_addr[i];
lp->init_block.filter[0] = 0x00000000;
lp->init_block.filter[1] = 0x00000000;
lp->init_block.rx_ring = (u32)le32_to_cpu(lp->dma_addr + offsetof(struct pcnet32_private, rx_ring));
lp->init_block.tx_ring = (u32)le32_to_cpu(lp->dma_addr + offsetof(struct pcnet32_private, tx_ring));
/* switch pcnet32 to 32bit mode */
a->write_bcr (ioaddr, 20, 2);
a->write_csr (ioaddr, 1, (lp->dma_addr + offsetof(struct pcnet32_private, init_block)) & 0xffff);
a->write_csr (ioaddr, 2, (lp->dma_addr + offsetof(struct pcnet32_private, init_block)) >> 16);
if (irq_line) {
dev->irq = irq_line;
}
if (dev->irq >= 2)
printk(" assigned IRQ %d.\n", dev->irq);
else {
unsigned long irq_mask = probe_irq_on();
/*
* To auto-IRQ we enable the initialization-done and DMA error
* interrupts. For ISA boards we get a DMA error, but VLB and PCI
* boards will work.
*/
/* Trigger an initialization just for the interrupt. */
a->write_csr (ioaddr, 0, 0x41);
mdelay (1);
dev->irq = probe_irq_off (irq_mask);
if (dev->irq)
printk(", probed IRQ %d.\n", dev->irq);
else {
printk(", failed to detect IRQ line.\n");
pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
release_resource(res);
return -ENODEV;
}
}
if (pcnet32_debug > 0)
printk(KERN_INFO "%s", version);
/* The PCNET32-specific entries in the device structure. */
dev->open = &pcnet32_open;
dev->hard_start_xmit = &pcnet32_start_xmit;
dev->stop = &pcnet32_close;
dev->get_stats = &pcnet32_get_stats;
dev->set_multicast_list = &pcnet32_set_multicast_list;
#ifdef HAVE_PRIVATE_IOCTL
dev->do_ioctl = &pcnet32_mii_ioctl;
#endif
dev->tx_timeout = pcnet32_tx_timeout;
dev->watchdog_timeo = (HZ >> 1);
lp->next = pcnet32_dev;
pcnet32_dev = dev;
/* Fill in the generic fields of the device structure. */
ether_setup(dev);
return 0;
}
static int
pcnet32_open(struct net_device *dev)
{
struct pcnet32_private *lp = dev->priv;
unsigned long ioaddr = dev->base_addr;
u16 val;
int i;
if (dev->irq == 0 ||
request_irq(dev->irq, &pcnet32_interrupt,
lp->shared_irq ? SA_SHIRQ : 0, lp->name, (void *)dev)) {
return -EAGAIN;
}
/* Check for a valid station address */
if( !is_valid_ether_addr(dev->dev_addr) )
return -EINVAL;
/* Reset the PCNET32 */
lp->a.reset (ioaddr);
/* switch pcnet32 to 32bit mode */
lp->a.write_bcr (ioaddr, 20, 2);
if (pcnet32_debug > 1)
printk(KERN_DEBUG "%s: pcnet32_open() irq %d tx/rx rings %#x/%#x init %#x.\n",
dev->name, dev->irq,
(u32) (lp->dma_addr + offsetof(struct pcnet32_private, tx_ring)),
(u32) (lp->dma_addr + offsetof(struct pcnet32_private, rx_ring)),
(u32) (lp->dma_addr + offsetof(struct pcnet32_private, init_block)));
/* set/reset autoselect bit */
val = lp->a.read_bcr (ioaddr, 2) & ~2;
if (lp->options & PCNET32_PORT_ASEL)
val |= 2;
lp->a.write_bcr (ioaddr, 2, val);
/* handle full duplex setting */
if (lp->full_duplex) {
val = lp->a.read_bcr (ioaddr, 9) & ~3;
if (lp->options & PCNET32_PORT_FD) {
val |= 1;
if (lp->options == (PCNET32_PORT_FD | PCNET32_PORT_AUI))
val |= 2;
}
lp->a.write_bcr (ioaddr, 9, val);
}
/* set/reset GPSI bit in test register */
val = lp->a.read_csr (ioaddr, 124) & ~0x10;
if ((lp->options & PCNET32_PORT_PORTSEL) == PCNET32_PORT_GPSI)
val |= 0x10;
lp->a.write_csr (ioaddr, 124, val);
if (lp->mii && !(lp->options & PCNET32_PORT_ASEL)) {
val = lp->a.read_bcr (ioaddr, 32) & ~0x38; /* disable Auto Negotiation, set 10Mpbs, HD */
if (lp->options & PCNET32_PORT_FD)
val |= 0x10;
if (lp->options & PCNET32_PORT_100)
val |= 0x08;
lp->a.write_bcr (ioaddr, 32, val);
} else {
if (lp->options & PCNET32_PORT_ASEL) { /* enable auto negotiate, setup, disable fd */
val = lp->a.read_bcr(ioaddr, 32) & ~0x98;
val |= 0x20;
lp->a.write_bcr(ioaddr, 32, val);
}
}
#ifdef DO_DXSUFLO
if (lp->dxsuflo) { /* Disable transmit stop on underflow */
val = lp->a.read_csr (ioaddr, 3);
val |= 0x40;
lp->a.write_csr (ioaddr, 3, val);
}
#endif
if (lp->ltint) { /* Enable TxDone-intr inhibitor */
val = lp->a.read_csr (ioaddr, 5);
val |= (1<<14);
lp->a.write_csr (ioaddr, 5, val);
}
lp->init_block.mode = le16_to_cpu((lp->options & PCNET32_PORT_PORTSEL) << 7);
lp->init_block.filter[0] = 0x00000000;
lp->init_block.filter[1] = 0x00000000;
if (pcnet32_init_ring(dev))
return -ENOMEM;
/* Re-initialize the PCNET32, and start it when done. */
lp->a.write_csr (ioaddr, 1, (lp->dma_addr + offsetof(struct pcnet32_private, init_block)) &0xffff);
lp->a.write_csr (ioaddr, 2, (lp->dma_addr + offsetof(struct pcnet32_private, init_block)) >> 16);
lp->a.write_csr (ioaddr, 4, 0x0915);
lp->a.write_csr (ioaddr, 0, 0x0001);
netif_start_queue(dev);
i = 0;
while (i++ < 100)
if (lp->a.read_csr (ioaddr, 0) & 0x0100)
break;
/*
* We used to clear the InitDone bit, 0x0100, here but Mark Stockton
* reports that doing so triggers a bug in the '974.
*/
lp->a.write_csr (ioaddr, 0, 0x0042);
if (pcnet32_debug > 2)
printk(KERN_DEBUG "%s: pcnet32 open after %d ticks, init block %#x csr0 %4.4x.\n",
dev->name, i, (u32) (lp->dma_addr + offsetof(struct pcnet32_private, init_block)),
lp->a.read_csr (ioaddr, 0));
MOD_INC_USE_COUNT;
return 0; /* Always succeed */
}
/*
* The LANCE has been halted for one reason or another (busmaster memory
* arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
* etc.). Modern LANCE variants always reload their ring-buffer
* configuration when restarted, so we must reinitialize our ring
* context before restarting. As part of this reinitialization,
* find all packets still on the Tx ring and pretend that they had been
* sent (in effect, drop the packets on the floor) - the higher-level
* protocols will time out and retransmit. It'd be better to shuffle
* these skbs to a temp list and then actually re-Tx them after
* restarting the chip, but I'm too lazy to do so right now. dplatt@3do.com
*/
static void
pcnet32_purge_tx_ring(struct net_device *dev)
{
struct pcnet32_private *lp = dev->priv;
int i;
for (i = 0; i < TX_RING_SIZE; i++) {
if (lp->tx_skbuff[i]) {
pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[i], lp->tx_skbuff[i]->len, PCI_DMA_TODEVICE);
dev_kfree_skb(lp->tx_skbuff[i]);
lp->tx_skbuff[i] = NULL;
lp->tx_dma_addr[i] = 0;
}
}
}
/* Initialize the PCNET32 Rx and Tx rings. */
static int
pcnet32_init_ring(struct net_device *dev)
{
struct pcnet32_private *lp = dev->priv;
int i;
lp->tx_full = 0;
lp->cur_rx = lp->cur_tx = 0;
lp->dirty_rx = lp->dirty_tx = 0;
for (i = 0; i < RX_RING_SIZE; i++) {
struct sk_buff *rx_skbuff = lp->rx_skbuff[i];
if (rx_skbuff == NULL) {
if (!(rx_skbuff = lp->rx_skbuff[i] = dev_alloc_skb (PKT_BUF_SZ))) {
/* there is not much, we can do at this point */
printk(KERN_ERR "%s: pcnet32_init_ring dev_alloc_skb failed.\n",dev->name);
return -1;
}
skb_reserve (rx_skbuff, 2);
}
lp->rx_dma_addr[i] = pci_map_single(lp->pci_dev, rx_skbuff->tail, rx_skbuff->len, PCI_DMA_FROMDEVICE);
lp->rx_ring[i].base = (u32)le32_to_cpu(lp->rx_dma_addr[i]);
lp->rx_ring[i].buf_length = le16_to_cpu(-PKT_BUF_SZ);
lp->rx_ring[i].status = le16_to_cpu(0x8000);
}
/* The Tx buffer address is filled in as needed, but we do need to clear
the upper ownership bit. */
for (i = 0; i < TX_RING_SIZE; i++) {
lp->tx_ring[i].base = 0;
lp->tx_ring[i].status = 0;
lp->tx_dma_addr[i] = 0;
}
lp->init_block.tlen_rlen = le16_to_cpu(TX_RING_LEN_BITS | RX_RING_LEN_BITS);
for (i = 0; i < 6; i++)
lp->init_block.phys_addr[i] = dev->dev_addr[i];
lp->init_block.rx_ring = (u32)le32_to_cpu(lp->dma_addr + offsetof(struct pcnet32_private, rx_ring));
lp->init_block.tx_ring = (u32)le32_to_cpu(lp->dma_addr + offsetof(struct pcnet32_private, tx_ring));
return 0;
}
static void
pcnet32_restart(struct net_device *dev, unsigned int csr0_bits)
{
struct pcnet32_private *lp = dev->priv;
unsigned long ioaddr = dev->base_addr;
int i;
pcnet32_purge_tx_ring(dev);
if (pcnet32_init_ring(dev))
return;
/* ReInit Ring */
lp->a.write_csr (ioaddr, 0, 1);
i = 0;
while (i++ < 100)
if (lp->a.read_csr (ioaddr, 0) & 0x0100)
break;
lp->a.write_csr (ioaddr, 0, csr0_bits);
}
static void
pcnet32_tx_timeout (struct net_device *dev)
{
struct pcnet32_private *lp = dev->priv;
unsigned int ioaddr = dev->base_addr;
/* Transmitter timeout, serious problems. */
printk(KERN_ERR "%s: transmit timed out, status %4.4x, resetting.\n",
dev->name, lp->a.read_csr (ioaddr, 0));
lp->a.write_csr (ioaddr, 0, 0x0004);
lp->stats.tx_errors++;
if (pcnet32_debug > 2) {
int i;
printk(KERN_DEBUG " Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
lp->dirty_tx, lp->cur_tx, lp->tx_full ? " (full)" : "",
lp->cur_rx);
for (i = 0 ; i < RX_RING_SIZE; i++)
printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
lp->rx_ring[i].base, -lp->rx_ring[i].buf_length,
lp->rx_ring[i].msg_length, (unsigned)lp->rx_ring[i].status);
for (i = 0 ; i < TX_RING_SIZE; i++)
printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
lp->tx_ring[i].base, -lp->tx_ring[i].length,
lp->tx_ring[i].misc, (unsigned)lp->tx_ring[i].status);
printk("\n");
}
pcnet32_restart(dev, 0x0042);
dev->trans_start = jiffies;
netif_start_queue(dev);
}
static int
pcnet32_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct pcnet32_private *lp = dev->priv;
unsigned int ioaddr = dev->base_addr;
u16 status;
int entry;
unsigned long flags;
if (pcnet32_debug > 3) {
printk(KERN_DEBUG "%s: pcnet32_start_xmit() called, csr0 %4.4x.\n",
dev->name, lp->a.read_csr (ioaddr, 0));
}
spin_lock_irqsave(&lp->lock, flags);
/* Default status -- will not enable Successful-TxDone
* interrupt when that option is available to us.
*/
status = 0x8300;
if ((lp->ltint) &&
((lp->cur_tx - lp->dirty_tx == TX_RING_SIZE/2) ||
(lp->cur_tx - lp->dirty_tx >= TX_RING_SIZE-2)))
{
/* Enable Successful-TxDone interrupt if we have
* 1/2 of, or nearly all of, our ring buffer Tx'd
* but not yet cleaned up. Thus, most of the time,
* we will not enable Successful-TxDone interrupts.
*/
status = 0x9300;
}
/* Fill in a Tx ring entry */
/* Mask to ring buffer boundary. */
entry = lp->cur_tx & TX_RING_MOD_MASK;
/* Caution: the write order is important here, set the base address
with the "ownership" bits last. */
lp->tx_ring[entry].length = le16_to_cpu(-skb->len);
lp->tx_ring[entry].misc = 0x00000000;
lp->tx_skbuff[entry] = skb;
lp->tx_dma_addr[entry] = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
lp->tx_ring[entry].base = (u32)le32_to_cpu(lp->tx_dma_addr[entry]);
lp->tx_ring[entry].status = le16_to_cpu(status);
lp->cur_tx++;
lp->stats.tx_bytes += skb->len;
/* Trigger an immediate send poll. */
lp->a.write_csr (ioaddr, 0, 0x0048);
dev->trans_start = jiffies;
if (lp->tx_ring[(entry+1) & TX_RING_MOD_MASK].base == 0)
netif_start_queue(dev);
else {
lp->tx_full = 1;
netif_stop_queue(dev);
}
spin_unlock_irqrestore(&lp->lock, flags);
return 0;
}
/* The PCNET32 interrupt handler. */
static void
pcnet32_interrupt(int irq, void *dev_id, struct pt_regs * regs)
{
struct net_device *dev = dev_id;
struct pcnet32_private *lp;
unsigned long ioaddr;
u16 csr0,rap;
int boguscnt = max_interrupt_work;
int must_restart;
if (dev == NULL) {
printk (KERN_DEBUG "pcnet32_interrupt(): irq %d for unknown device.\n", irq);
return;
}
ioaddr = dev->base_addr;
lp = dev->priv;
spin_lock(&lp->lock);
rap = lp->a.read_rap(ioaddr);
while ((csr0 = lp->a.read_csr (ioaddr, 0)) & 0x8600 && --boguscnt >= 0) {
/* Acknowledge all of the current interrupt sources ASAP. */
lp->a.write_csr (ioaddr, 0, csr0 & ~0x004f);
must_restart = 0;
if (pcnet32_debug > 5)
printk(KERN_DEBUG "%s: interrupt csr0=%#2.2x new csr=%#2.2x.\n",
dev->name, csr0, lp->a.read_csr (ioaddr, 0));
if (csr0 & 0x0400) /* Rx interrupt */
pcnet32_rx(dev);
if (csr0 & 0x0200) { /* Tx-done interrupt */
unsigned int dirty_tx = lp->dirty_tx;
while (dirty_tx < lp->cur_tx) {
int entry = dirty_tx & TX_RING_MOD_MASK;
int status = (short)le16_to_cpu(lp->tx_ring[entry].status);
if (status < 0)
break; /* It still hasn't been Txed */
lp->tx_ring[entry].base = 0;
if (status & 0x4000) {
/* There was an major error, log it. */
int err_status = le32_to_cpu(lp->tx_ring[entry].misc);
lp->stats.tx_errors++;
if (err_status & 0x04000000) lp->stats.tx_aborted_errors++;
if (err_status & 0x08000000) lp->stats.tx_carrier_errors++;
if (err_status & 0x10000000) lp->stats.tx_window_errors++;
#ifndef DO_DXSUFLO
if (err_status & 0x40000000) {
lp->stats.tx_fifo_errors++;
/* Ackk! On FIFO errors the Tx unit is turned off! */
/* Remove this verbosity later! */
printk(KERN_ERR "%s: Tx FIFO error! CSR0=%4.4x\n",
dev->name, csr0);
must_restart = 1;
}
#else
if (err_status & 0x40000000) {
lp->stats.tx_fifo_errors++;
if (! lp->dxsuflo) { /* If controller doesn't recover ... */
/* Ackk! On FIFO errors the Tx unit is turned off! */
/* Remove this verbosity later! */
printk(KERN_ERR "%s: Tx FIFO error! CSR0=%4.4x\n",
dev->name, csr0);
must_restart = 1;
}
}
#endif
} else {
if (status & 0x1800)
lp->stats.collisions++;
lp->stats.tx_packets++;
}
/* We must free the original skb */
if (lp->tx_skbuff[entry]) {
pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[entry], lp->tx_skbuff[entry]->len, PCI_DMA_TODEVICE);
dev_kfree_skb_irq(lp->tx_skbuff[entry]);
lp->tx_skbuff[entry] = 0;
lp->tx_dma_addr[entry] = 0;
}
dirty_tx++;
}
#ifndef final_version
if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
printk(KERN_ERR "out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
dirty_tx, lp->cur_tx, lp->tx_full);
dirty_tx += TX_RING_SIZE;
}
#endif
if (lp->tx_full &&
netif_queue_stopped(dev) &&
dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
/* The ring is no longer full, clear tbusy. */
lp->tx_full = 0;
netif_wake_queue (dev);
}
lp->dirty_tx = dirty_tx;
}
/* Log misc errors. */
if (csr0 & 0x4000) lp->stats.tx_errors++; /* Tx babble. */
if (csr0 & 0x1000) {
/*
* this happens when our receive ring is full. This shouldn't
* be a problem as we will see normal rx interrupts for the frames
* in the receive ring. But there are some PCI chipsets (I can reproduce
* this on SP3G with Intel saturn chipset) which have sometimes problems
* and will fill up the receive ring with error descriptors. In this
* situation we don't get a rx interrupt, but a missed frame interrupt sooner
* or later. So we try to clean up our receive ring here.
*/
pcnet32_rx(dev);
lp->stats.rx_errors++; /* Missed a Rx frame. */
}
if (csr0 & 0x0800) {
printk(KERN_ERR "%s: Bus master arbitration failure, status %4.4x.\n",
dev->name, csr0);
/* unlike for the lance, there is no restart needed */
}
if (must_restart) {
/* stop the chip to clear the error condition, then restart */
lp->a.write_csr (ioaddr, 0, 0x0004);
pcnet32_restart(dev, 0x0002);
}
}
/* Clear any other interrupt, and set interrupt enable. */
lp->a.write_csr (ioaddr, 0, 0x7940);
lp->a.write_rap(ioaddr,rap);
if (pcnet32_debug > 4)
printk(KERN_DEBUG "%s: exiting interrupt, csr0=%#4.4x.\n",
dev->name, lp->a.read_csr (ioaddr, 0));
spin_unlock(&lp->lock);
}
static int
pcnet32_rx(struct net_device *dev)
{
struct pcnet32_private *lp = dev->priv;
int entry = lp->cur_rx & RX_RING_MOD_MASK;
/* If we own the next entry, it's a new packet. Send it up. */
while ((short)le16_to_cpu(lp->rx_ring[entry].status) >= 0) {
int status = (short)le16_to_cpu(lp->rx_ring[entry].status) >> 8;
if (status != 0x03) { /* There was an error. */
/*
* There is a tricky error noted by John Murphy,
* <murf@perftech.com> to Russ Nelson: Even with full-sized
* buffers it's possible for a jabber packet to use two
* buffers, with only the last correctly noting the error.
*/
if (status & 0x01) /* Only count a general error at the */
lp->stats.rx_errors++; /* end of a packet.*/
if (status & 0x20) lp->stats.rx_frame_errors++;
if (status & 0x10) lp->stats.rx_over_errors++;
if (status & 0x08) lp->stats.rx_crc_errors++;
if (status & 0x04) lp->stats.rx_fifo_errors++;
lp->rx_ring[entry].status &= le16_to_cpu(0x03ff);
} else {
/* Malloc up new buffer, compatible with net-2e. */
short pkt_len = (le32_to_cpu(lp->rx_ring[entry].msg_length) & 0xfff)-4;
struct sk_buff *skb;
if(pkt_len < 60) {
printk(KERN_ERR "%s: Runt packet!\n",dev->name);
lp->stats.rx_errors++;
} else {
int rx_in_place = 0;
if (pkt_len > rx_copybreak) {
struct sk_buff *newskb;
if ((newskb = dev_alloc_skb (PKT_BUF_SZ))) {
skb_reserve (newskb, 2);
skb = lp->rx_skbuff[entry];
skb_put (skb, pkt_len);
lp->rx_skbuff[entry] = newskb;
newskb->dev = dev;
lp->rx_dma_addr[entry] = pci_map_single(lp->pci_dev, newskb->tail, newskb->len, PCI_DMA_FROMDEVICE);
lp->rx_ring[entry].base = le32_to_cpu(lp->rx_dma_addr[entry]);
rx_in_place = 1;
} else
skb = NULL;
} else {
skb = dev_alloc_skb(pkt_len+2);
}
if (skb == NULL) {
int i;
printk(KERN_ERR "%s: Memory squeeze, deferring packet.\n", dev->name);
for (i = 0; i < RX_RING_SIZE; i++)
if ((short)le16_to_cpu(lp->rx_ring[(entry+i) & RX_RING_MOD_MASK].status) < 0)
break;
if (i > RX_RING_SIZE -2) {
lp->stats.rx_dropped++;
lp->rx_ring[entry].status |= le16_to_cpu(0x8000);
lp->cur_rx++;
}
break;
}
skb->dev = dev;
if (!rx_in_place) {
skb_reserve(skb,2); /* 16 byte align */
skb_put(skb,pkt_len); /* Make room */
eth_copy_and_sum(skb,
(unsigned char *)(lp->rx_skbuff[entry]->tail),
pkt_len,0);
}
lp->stats.rx_bytes += skb->len;
skb->protocol=eth_type_trans(skb,dev);
netif_rx(skb);
lp->stats.rx_packets++;
}
}
/*
* The docs say that the buffer length isn't touched, but Andrew Boyd
* of QNX reports that some revs of the 79C965 clear it.
*/
lp->rx_ring[entry].buf_length = le16_to_cpu(-PKT_BUF_SZ);
lp->rx_ring[entry].status |= le16_to_cpu(0x8000);
entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
}
return 0;
}
static int
pcnet32_close(struct net_device *dev)
{
unsigned long ioaddr = dev->base_addr;
struct pcnet32_private *lp = dev->priv;
int i;
netif_stop_queue(dev);
lp->stats.rx_missed_errors = lp->a.read_csr (ioaddr, 112);
if (pcnet32_debug > 1)
printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
dev->name, lp->a.read_csr (ioaddr, 0));
/* We stop the PCNET32 here -- it occasionally polls memory if we don't. */
lp->a.write_csr (ioaddr, 0, 0x0004);
/*
* Switch back to 16bit mode to avoid problems with dumb
* DOS packet driver after a warm reboot
*/
lp->a.write_bcr (ioaddr, 20, 4);
free_irq(dev->irq, dev);
/* free all allocated skbuffs */
for (i = 0; i < RX_RING_SIZE; i++) {
lp->rx_ring[i].status = 0;
if (lp->rx_skbuff[i]) {
pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[i], lp->rx_skbuff[i]->len, PCI_DMA_FROMDEVICE);
dev_kfree_skb(lp->rx_skbuff[i]);
}
lp->rx_skbuff[i] = NULL;
lp->rx_dma_addr[i] = 0;
}
for (i = 0; i < TX_RING_SIZE; i++) {
if (lp->tx_skbuff[i]) {
pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[i], lp->tx_skbuff[i]->len, PCI_DMA_TODEVICE);
dev_kfree_skb(lp->tx_skbuff[i]);
}
lp->tx_skbuff[i] = NULL;
lp->tx_dma_addr[i] = 0;
}
MOD_DEC_USE_COUNT;
return 0;
}
static struct net_device_stats *
pcnet32_get_stats(struct net_device *dev)
{
struct pcnet32_private *lp = dev->priv;
unsigned long ioaddr = dev->base_addr;
u16 saved_addr;
unsigned long flags;
spin_lock_irqsave(&lp->lock, flags);
saved_addr = lp->a.read_rap(ioaddr);
lp->stats.rx_missed_errors = lp->a.read_csr (ioaddr, 112);
lp->a.write_rap(ioaddr, saved_addr);
spin_unlock_irqrestore(&lp->lock, flags);
return &lp->stats;
}
/* taken from the sunlance driver, which it took from the depca driver */
static void pcnet32_load_multicast (struct net_device *dev)
{
struct pcnet32_private *lp = dev->priv;
volatile struct pcnet32_init_block *ib = &lp->init_block;
volatile u16 *mcast_table = (u16 *)&ib->filter;
struct dev_mc_list *dmi=dev->mc_list;
char *addrs;
int i;
u32 crc;
/* set all multicast bits */
if (dev->flags & IFF_ALLMULTI){
ib->filter [0] = 0xffffffff;
ib->filter [1] = 0xffffffff;
return;
}
/* clear the multicast filter */
ib->filter [0] = 0;
ib->filter [1] = 0;
/* Add addresses */
for (i = 0; i < dev->mc_count; i++){
addrs = dmi->dmi_addr;
dmi = dmi->next;
/* multicast address? */
if (!(*addrs & 1))
continue;
crc = ether_crc_le(6, addrs);
crc = crc >> 26;
mcast_table [crc >> 4] |= 1 << (crc & 0xf);
}
return;
}
/*
* Set or clear the multicast filter for this adaptor.
*/
static void pcnet32_set_multicast_list(struct net_device *dev)
{
unsigned long ioaddr = dev->base_addr;
struct pcnet32_private *lp = dev->priv;
if (dev->flags&IFF_PROMISC) {
/* Log any net taps. */
printk(KERN_INFO "%s: Promiscuous mode enabled.\n", dev->name);
lp->init_block.mode = le16_to_cpu(0x8000 | (lp->options & PCNET32_PORT_PORTSEL) << 7);
} else {
lp->init_block.mode = le16_to_cpu((lp->options & PCNET32_PORT_PORTSEL) << 7);
pcnet32_load_multicast (dev);
}
lp->a.write_csr (ioaddr, 0, 0x0004); /* Temporarily stop the lance. */
pcnet32_restart(dev, 0x0042); /* Resume normal operation */
}
#ifdef HAVE_PRIVATE_IOCTL
static int pcnet32_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
unsigned long ioaddr = dev->base_addr;
struct pcnet32_private *lp = dev->priv;
u16 *data = (u16 *)&rq->ifr_data;
int phyaddr = lp->a.read_bcr (ioaddr, 33);
if (lp->mii) {
switch(cmd) {
case SIOCDEVPRIVATE: /* Get the address of the PHY in use. */
data[0] = (phyaddr >> 5) & 0x1f;
/* Fall Through */
case SIOCDEVPRIVATE+1: /* Read the specified MII register. */
lp->a.write_bcr (ioaddr, 33, ((data[0] & 0x1f) << 5) | (data[1] & 0x1f));
data[3] = lp->a.read_bcr (ioaddr, 34);
lp->a.write_bcr (ioaddr, 33, phyaddr);
return 0;
case SIOCDEVPRIVATE+2: /* Write the specified MII register */
if (!capable(CAP_NET_ADMIN))
return -EPERM;
lp->a.write_bcr (ioaddr, 33, ((data[0] & 0x1f) << 5) | (data[1] & 0x1f));
lp->a.write_bcr (ioaddr, 34, data[2]);
lp->a.write_bcr (ioaddr, 33, phyaddr);
return 0;
default:
return -EOPNOTSUPP;
}
}
return -EOPNOTSUPP;
}
#endif /* HAVE_PRIVATE_IOCTL */
static struct pci_driver pcnet32_driver = {
name: "pcnet32",
probe: pcnet32_probe_pci,
remove: NULL,
id_table: pcnet32_pci_tbl,
};
MODULE_PARM(debug, "i");
MODULE_PARM(max_interrupt_work, "i");
MODULE_PARM(rx_copybreak, "i");
MODULE_PARM(tx_start_pt, "i");
MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
MODULE_AUTHOR("Thomas Bogendoerfer");
MODULE_DESCRIPTION("Driver for PCnet32 and PCnetPCI based ethercards");
MODULE_LICENSE("GPL");
/* An additional parameter that may be passed in... */
static int debug = -1;
static int tx_start_pt = -1;
static int __init pcnet32_init_module(void)
{
int cards_found = 0;
int err;
if (debug > 0)
pcnet32_debug = debug;
if ((tx_start_pt >= 0) && (tx_start_pt <= 3))
tx_start = tx_start_pt;
pcnet32_dev = NULL;
/* find the PCI devices */
#define USE_PCI_REGISTER_DRIVER
#ifdef USE_PCI_REGISTER_DRIVER
if ((err = pci_module_init(&pcnet32_driver)) < 0 )
return err;
#else
{
struct pci_device_id *devid = pcnet32_pci_tbl;
for (devid = pcnet32_pci_tbl; devid != NULL && devid->vendor != 0; devid++) {
struct pci_dev *pdev = pci_find_subsys(devid->vendor, devid->device, devid->subvendor, devid->subdevice, NULL);
if (pdev != NULL) {
if (pcnet32_probe_pci(pdev, devid) >= 0) {
cards_found++;
}
}
}
}
#endif
return 0;
/* find any remaining VLbus devices */
return pcnet32_probe_vlbus(cards_found);
}
static void __exit pcnet32_cleanup_module(void)
{
struct net_device *next_dev;
/* No need to check MOD_IN_USE, as sys_delete_module() checks. */
while (pcnet32_dev) {
struct pcnet32_private *lp = pcnet32_dev->priv;
next_dev = lp->next;
unregister_netdev(pcnet32_dev);
release_region(pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE);
if (lp->pci_dev != NULL)
pci_unregister_driver(&pcnet32_driver);
pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
kfree(pcnet32_dev);
pcnet32_dev = next_dev;
}
}
module_init(pcnet32_init_module);
module_exit(pcnet32_cleanup_module);
/*
* Local variables:
* compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c pcnet32.c"
* c-indent-level: 4
* tab-width: 8
* End:
*/