- 根目录:
- drivers
- net
- lance.c
static const char version[] = "lance.c:v1.16 2006/11/09 dplatt@3do.com, becker@cesdis.gsfc.nasa.gov\n";
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/mm.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <asm/dma.h>
static unsigned int lance_portlist[] __initdata = { 0x300, 0x320, 0x340, 0x360, 0};
static int lance_probe1(struct net_device *dev, int ioaddr, int irq, int options);
static int __init do_lance_probe(struct net_device *dev);
static struct card {
char id_offset14;
char id_offset15;
} cards[] = {
{
.id_offset14 = 0x57,
.id_offset15 = 0x57,
},
{
.id_offset14 = 0x52,
.id_offset15 = 0x44,
},
{
.id_offset14 = 0x52,
.id_offset15 = 0x49,
},
};
#define NUM_CARDS 3
#ifdef LANCE_DEBUG
static int lance_debug = LANCE_DEBUG;
#else
static int lance_debug = 1;
#endif
#ifndef LANCE_LOG_TX_BUFFERS
#define LANCE_LOG_TX_BUFFERS 4
#define LANCE_LOG_RX_BUFFERS 4
#endif
#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
#define PKT_BUF_SZ 1544
#define LANCE_DATA 0x10
#define LANCE_ADDR 0x12
#define LANCE_RESET 0x14
#define LANCE_BUS_IF 0x16
#define LANCE_TOTAL_SIZE 0x18
#define TX_TIMEOUT (HZ/5)
struct lance_rx_head {
s32 base;
s16 buf_length;
s16 msg_length;
};
struct lance_tx_head {
s32 base;
s16 length;
s16 misc;
};
struct lance_init_block {
u16 mode;
u8 phys_addr[6];
u32 filter[2];
u32 rx_ring;
u32 tx_ring;
};
struct lance_private {
struct lance_rx_head rx_ring[RX_RING_SIZE];
struct lance_tx_head tx_ring[TX_RING_SIZE];
struct lance_init_block init_block;
const char *name;
struct sk_buff* tx_skbuff[TX_RING_SIZE];
struct sk_buff* rx_skbuff[RX_RING_SIZE];
unsigned long rx_buffs;
char (*tx_bounce_buffs)[PKT_BUF_SZ];
int cur_rx, cur_tx;
int dirty_rx, dirty_tx;
int dma;
unsigned char chip_version;
spinlock_t devlock;
};
#define LANCE_MUST_PAD 0x00000001
#define LANCE_ENABLE_AUTOSELECT 0x00000002
#define LANCE_MUST_REINIT_RING 0x00000004
#define LANCE_MUST_UNRESET 0x00000008
#define LANCE_HAS_MISSED_FRAME 0x00000010
static struct lance_chip_type {
int id_number;
const char *name;
int flags;
} chip_table[] = {
{0x0000, "LANCE 7990",
LANCE_MUST_PAD + LANCE_MUST_UNRESET},
{0x0003, "PCnet/ISA 79C960",
LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
LANCE_HAS_MISSED_FRAME},
{0x2260, "PCnet/ISA+ 79C961",
LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
LANCE_HAS_MISSED_FRAME},
{0x2420, "PCnet/PCI 79C970",
LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
LANCE_HAS_MISSED_FRAME},
{0x2430, "PCnet32",
LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
LANCE_HAS_MISSED_FRAME},
{0x2621, "PCnet/PCI-II 79C970A",
LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
LANCE_HAS_MISSED_FRAME},
{0x0, "PCnet (unknown)",
LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
LANCE_HAS_MISSED_FRAME},
};
enum {OLD_LANCE = 0, PCNET_ISA=1, PCNET_ISAP=2, PCNET_PCI=3, PCNET_VLB=4, PCNET_PCI_II=5, LANCE_UNKNOWN=6};
static unsigned char lance_need_isa_bounce_buffers = 1;
static int lance_open(struct net_device *dev);
static void lance_init_ring(struct net_device *dev, gfp_t mode);
static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
struct net_device *dev);
static int lance_rx(struct net_device *dev);
static irqreturn_t lance_interrupt(int irq, void *dev_id);
static int lance_close(struct net_device *dev);
static struct net_device_stats *lance_get_stats(struct net_device *dev);
static void set_multicast_list(struct net_device *dev);
static void lance_tx_timeout (struct net_device *dev);
#ifdef MODULE
#define MAX_CARDS 8
static struct net_device *dev_lance[MAX_CARDS];
static int io[MAX_CARDS];
static int dma[MAX_CARDS];
static int irq[MAX_CARDS];
module_param_array(io, int, NULL, 0);
module_param_array(dma, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param(lance_debug, int, 0);
MODULE_PARM_DESC(io, "LANCE/PCnet I/O base address(es),required");
MODULE_PARM_DESC(dma, "LANCE/PCnet ISA DMA channel (ignored for some devices)");
MODULE_PARM_DESC(irq, "LANCE/PCnet IRQ number (ignored for some devices)");
MODULE_PARM_DESC(lance_debug, "LANCE/PCnet debug level (0-7)");
int __init init_module(void)
{
struct net_device *dev;
int this_dev, found = 0;
for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
if (io[this_dev] == 0) {
if (this_dev != 0)
break;
printk(KERN_NOTICE "lance.c: Module autoprobing not allowed. Append \"io=0xNNN\" value(s).\n");
return -EPERM;
}
dev = alloc_etherdev(0);
if (!dev)
break;
dev->irq = irq[this_dev];
dev->base_addr = io[this_dev];
dev->dma = dma[this_dev];
if (do_lance_probe(dev) == 0) {
dev_lance[found++] = dev;
continue;
}
free_netdev(dev);
break;
}
if (found != 0)
return 0;
return -ENXIO;
}
static void cleanup_card(struct net_device *dev)
{
struct lance_private *lp = dev->ml_priv;
if (dev->dma != 4)
free_dma(dev->dma);
release_region(dev->base_addr, LANCE_TOTAL_SIZE);
kfree(lp->tx_bounce_buffs);
kfree((void*)lp->rx_buffs);
kfree(lp);
}
void __exit cleanup_module(void)
{
int this_dev;
for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
struct net_device *dev = dev_lance[this_dev];
if (dev) {
unregister_netdev(dev);
cleanup_card(dev);
free_netdev(dev);
}
}
}
#endif
MODULE_LICENSE("GPL");
static int __init do_lance_probe(struct net_device *dev)
{
unsigned int *port;
int result;
if (high_memory <= phys_to_virt(16*1024*1024))
lance_need_isa_bounce_buffers = 0;
for (port = lance_portlist; *port; port++) {
int ioaddr = *port;
struct resource *r = request_region(ioaddr, LANCE_TOTAL_SIZE,
"lance-probe");
if (r) {
char offset14 = inb(ioaddr + 14);
int card;
for (card = 0; card < NUM_CARDS; ++card)
if (cards[card].id_offset14 == offset14)
break;
if (card < NUM_CARDS) {
char offset15 = inb(ioaddr + 15);
for (card = 0; card < NUM_CARDS; ++card)
if ((cards[card].id_offset14 == offset14) &&
(cards[card].id_offset15 == offset15))
break;
}
if (card < NUM_CARDS) {
result = lance_probe1(dev, ioaddr, 0, 0);
if (!result) {
struct lance_private *lp = dev->ml_priv;
int ver = lp->chip_version;
r->name = chip_table[ver].name;
return 0;
}
}
release_region(ioaddr, LANCE_TOTAL_SIZE);
}
}
return -ENODEV;
}
#ifndef MODULE
struct net_device * __init lance_probe(int unit)
{
struct net_device *dev = alloc_etherdev(0);
int err;
if (!dev)
return ERR_PTR(-ENODEV);
sprintf(dev->name, "eth%d", unit);
netdev_boot_setup_check(dev);
err = do_lance_probe(dev);
if (err)
goto out;
return dev;
out:
free_netdev(dev);
return ERR_PTR(err);
}
#endif
static const struct net_device_ops lance_netdev_ops = {
.ndo_open = lance_open,
.ndo_start_xmit = lance_start_xmit,
.ndo_stop = lance_close,
.ndo_get_stats = lance_get_stats,
.ndo_set_multicast_list = set_multicast_list,
.ndo_tx_timeout = lance_tx_timeout,
.ndo_change_mtu = eth_change_mtu,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
};
static int __init lance_probe1(struct net_device *dev, int ioaddr, int irq, int options)
{
struct lance_private *lp;
unsigned long dma_channels;
int i, reset_val, lance_version;
const char *chipname;
unsigned char hpJ2405A = 0;
int hp_builtin = 0;
static int did_version;
unsigned long flags;
int err = -ENOMEM;
void __iomem *bios;
bios = ioremap(0xf00f0, 0x14);
if (!bios)
return -ENOMEM;
if (readw(bios + 0x12) == 0x5048) {
static const short ioaddr_table[] = { 0x300, 0x320, 0x340, 0x360};
int hp_port = (readl(bios + 1) & 1) ? 0x499 : 0x99;
if ((inb(hp_port) & 0xc0) == 0x80 &&
ioaddr_table[inb(hp_port) & 3] == ioaddr)
hp_builtin = hp_port;
}
iounmap(bios);
hpJ2405A = (inb(ioaddr) == 0x08 && inb(ioaddr+1) == 0x00 &&
inb(ioaddr+2) == 0x09);
reset_val = inw(ioaddr+LANCE_RESET);
if (!hpJ2405A)
outw(reset_val, ioaddr+LANCE_RESET);
outw(0x0000, ioaddr+LANCE_ADDR);
if (inw(ioaddr+LANCE_DATA) != 0x0004)
return -ENODEV;
outw(88, ioaddr+LANCE_ADDR);
if (inw(ioaddr+LANCE_ADDR) != 88) {
lance_version = 0;
} else {
int chip_version = inw(ioaddr+LANCE_DATA);
outw(89, ioaddr+LANCE_ADDR);
chip_version |= inw(ioaddr+LANCE_DATA) << 16;
if (lance_debug > 2)
printk(" LANCE chip version is %#x.\n", chip_version);
if ((chip_version & 0xfff) != 0x003)
return -ENODEV;
chip_version = (chip_version >> 12) & 0xffff;
for (lance_version = 1; chip_table[lance_version].id_number; lance_version++) {
if (chip_table[lance_version].id_number == chip_version)
break;
}
}
chipname = chip_table[lance_version].name;
printk("%s: %s at %#3x, ", dev->name, chipname, ioaddr);
for (i = 0; i < 6; i++)
dev->dev_addr[i] = inb(ioaddr + i);
printk("%pM", dev->dev_addr);
dev->base_addr = ioaddr;
lp = kzalloc(sizeof(*lp), GFP_DMA | GFP_KERNEL);
if(lp==NULL)
return -ENODEV;
if (lance_debug > 6) printk(" (#0x%05lx)", (unsigned long)lp);
dev->ml_priv = lp;
lp->name = chipname;
lp->rx_buffs = (unsigned long)kmalloc(PKT_BUF_SZ*RX_RING_SIZE,
GFP_DMA | GFP_KERNEL);
if (!lp->rx_buffs)
goto out_lp;
if (lance_need_isa_bounce_buffers) {
lp->tx_bounce_buffs = kmalloc(PKT_BUF_SZ*TX_RING_SIZE,
GFP_DMA | GFP_KERNEL);
if (!lp->tx_bounce_buffs)
goto out_rx;
} else
lp->tx_bounce_buffs = NULL;
lp->chip_version = lance_version;
spin_lock_init(&lp->devlock);
lp->init_block.mode = 0x0003;
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)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
outw(0x0001, ioaddr+LANCE_ADDR);
inw(ioaddr+LANCE_ADDR);
outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
outw(0x0002, ioaddr+LANCE_ADDR);
inw(ioaddr+LANCE_ADDR);
outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
outw(0x0000, ioaddr+LANCE_ADDR);
inw(ioaddr+LANCE_ADDR);
if (irq) {
dev->dma = 4;
dev->irq = irq;
} else if (hp_builtin) {
static const char dma_tbl[4] = {3, 5, 6, 0};
static const char irq_tbl[4] = {3, 4, 5, 9};
unsigned char port_val = inb(hp_builtin);
dev->dma = dma_tbl[(port_val >> 4) & 3];
dev->irq = irq_tbl[(port_val >> 2) & 3];
printk(" HP Vectra IRQ %d DMA %d.\n", dev->irq, dev->dma);
} else if (hpJ2405A) {
static const char dma_tbl[4] = {3, 5, 6, 7};
static const char irq_tbl[8] = {3, 4, 5, 9, 10, 11, 12, 15};
short reset_val = inw(ioaddr+LANCE_RESET);
dev->dma = dma_tbl[(reset_val >> 2) & 3];
dev->irq = irq_tbl[(reset_val >> 4) & 7];
printk(" HP J2405A IRQ %d DMA %d.\n", dev->irq, dev->dma);
} else if (lance_version == PCNET_ISAP) {
short bus_info;
outw(8, ioaddr+LANCE_ADDR);
bus_info = inw(ioaddr+LANCE_BUS_IF);
dev->dma = bus_info & 0x07;
dev->irq = (bus_info >> 4) & 0x0F;
} else {
if (dev->mem_start & 0x07)
dev->dma = dev->mem_start & 0x07;
}
if (dev->dma == 0) {
dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) |
(inb(DMA2_STAT_REG) & 0xf0);
}
err = -ENODEV;
if (dev->irq >= 2)
printk(" assigned IRQ %d", dev->irq);
else if (lance_version != 0) {
unsigned long irq_mask;
irq_mask = probe_irq_on();
outw(0x0041, ioaddr+LANCE_DATA);
mdelay(20);
dev->irq = probe_irq_off(irq_mask);
if (dev->irq)
printk(", probed IRQ %d", dev->irq);
else {
printk(", failed to detect IRQ line.\n");
goto out_tx;
}
if (inw(ioaddr+LANCE_DATA) & 0x0100)
dev->dma = 4;
}
if (dev->dma == 4) {
printk(", no DMA needed.\n");
} else if (dev->dma) {
if (request_dma(dev->dma, chipname)) {
printk("DMA %d allocation failed.\n", dev->dma);
goto out_tx;
} else
printk(", assigned DMA %d.\n", dev->dma);
} else {
for (i = 0; i < 4; i++) {
static const char dmas[] = { 5, 6, 7, 3 };
int dma = dmas[i];
int boguscnt;
if (test_bit(dma, &dma_channels))
continue;
outw(0x7f04, ioaddr+LANCE_DATA);
if (request_dma(dma, chipname))
continue;
flags=claim_dma_lock();
set_dma_mode(dma, DMA_MODE_CASCADE);
enable_dma(dma);
release_dma_lock(flags);
outw(0x0001, ioaddr+LANCE_DATA);
for (boguscnt = 100; boguscnt > 0; --boguscnt)
if (inw(ioaddr+LANCE_DATA) & 0x0900)
break;
if (inw(ioaddr+LANCE_DATA) & 0x0100) {
dev->dma = dma;
printk(", DMA %d.\n", dev->dma);
break;
} else {
flags=claim_dma_lock();
disable_dma(dma);
release_dma_lock(flags);
free_dma(dma);
}
}
if (i == 4) {
printk("DMA detection failed.\n");
goto out_tx;
}
}
if (lance_version == 0 && dev->irq == 0) {
unsigned long irq_mask;
irq_mask = probe_irq_on();
outw(0x0041, ioaddr+LANCE_DATA);
mdelay(40);
dev->irq = probe_irq_off(irq_mask);
if (dev->irq == 0) {
printk(" Failed to detect the 7990 IRQ line.\n");
goto out_dma;
}
printk(" Auto-IRQ detected IRQ%d.\n", dev->irq);
}
if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
outw(0x0002, ioaddr+LANCE_ADDR);
outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
}
if (lance_debug > 0 && did_version++ == 0)
printk(version);
dev->netdev_ops = &lance_netdev_ops;
dev->watchdog_timeo = TX_TIMEOUT;
err = register_netdev(dev);
if (err)
goto out_dma;
return 0;
out_dma:
if (dev->dma != 4)
free_dma(dev->dma);
out_tx:
kfree(lp->tx_bounce_buffs);
out_rx:
kfree((void*)lp->rx_buffs);
out_lp:
kfree(lp);
return err;
}
static int
lance_open(struct net_device *dev)
{
struct lance_private *lp = dev->ml_priv;
int ioaddr = dev->base_addr;
int i;
if (dev->irq == 0 ||
request_irq(dev->irq, lance_interrupt, 0, lp->name, dev)) {
return -EAGAIN;
}
inw(ioaddr+LANCE_RESET);
if (dev->dma != 4) {
unsigned long flags=claim_dma_lock();
enable_dma(dev->dma);
set_dma_mode(dev->dma, DMA_MODE_CASCADE);
release_dma_lock(flags);
}
if (chip_table[lp->chip_version].flags & LANCE_MUST_UNRESET)
outw(0, ioaddr+LANCE_RESET);
if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
outw(0x0002, ioaddr+LANCE_ADDR);
outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
}
if (lance_debug > 1)
printk("%s: lance_open() irq %d dma %d tx/rx rings %#x/%#x init %#x.\n",
dev->name, dev->irq, dev->dma,
(u32) isa_virt_to_bus(lp->tx_ring),
(u32) isa_virt_to_bus(lp->rx_ring),
(u32) isa_virt_to_bus(&lp->init_block));
lance_init_ring(dev, GFP_KERNEL);
outw(0x0001, ioaddr+LANCE_ADDR);
outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
outw(0x0002, ioaddr+LANCE_ADDR);
outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
outw(0x0004, ioaddr+LANCE_ADDR);
outw(0x0915, ioaddr+LANCE_DATA);
outw(0x0000, ioaddr+LANCE_ADDR);
outw(0x0001, ioaddr+LANCE_DATA);
netif_start_queue (dev);
i = 0;
while (i++ < 100)
if (inw(ioaddr+LANCE_DATA) & 0x0100)
break;
outw(0x0042, ioaddr+LANCE_DATA);
if (lance_debug > 2)
printk("%s: LANCE open after %d ticks, init block %#x csr0 %4.4x.\n",
dev->name, i, (u32) isa_virt_to_bus(&lp->init_block), inw(ioaddr+LANCE_DATA));
return 0;
}
static void
lance_purge_ring(struct net_device *dev)
{
struct lance_private *lp = dev->ml_priv;
int i;
for (i = 0; i < RX_RING_SIZE; i++) {
struct sk_buff *skb = lp->rx_skbuff[i];
lp->rx_skbuff[i] = NULL;
lp->rx_ring[i].base = 0;
if (skb)
dev_kfree_skb_any(skb);
}
for (i = 0; i < TX_RING_SIZE; i++) {
if (lp->tx_skbuff[i]) {
dev_kfree_skb_any(lp->tx_skbuff[i]);
lp->tx_skbuff[i] = NULL;
}
}
}
static void
lance_init_ring(struct net_device *dev, gfp_t gfp)
{
struct lance_private *lp = dev->ml_priv;
int i;
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 *skb;
void *rx_buff;
skb = alloc_skb(PKT_BUF_SZ, GFP_DMA | gfp);
lp->rx_skbuff[i] = skb;
if (skb) {
skb->dev = dev;
rx_buff = skb->data;
} else
rx_buff = kmalloc(PKT_BUF_SZ, GFP_DMA | gfp);
if (rx_buff == NULL)
lp->rx_ring[i].base = 0;
else
lp->rx_ring[i].base = (u32)isa_virt_to_bus(rx_buff) | 0x80000000;
lp->rx_ring[i].buf_length = -PKT_BUF_SZ;
}
for (i = 0; i < TX_RING_SIZE; i++) {
lp->tx_skbuff[i] = NULL;
lp->tx_ring[i].base = 0;
}
lp->init_block.mode = 0x0000;
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)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
}
static void
lance_restart(struct net_device *dev, unsigned int csr0_bits, int must_reinit)
{
struct lance_private *lp = dev->ml_priv;
if (must_reinit ||
(chip_table[lp->chip_version].flags & LANCE_MUST_REINIT_RING)) {
lance_purge_ring(dev);
lance_init_ring(dev, GFP_ATOMIC);
}
outw(0x0000, dev->base_addr + LANCE_ADDR);
outw(csr0_bits, dev->base_addr + LANCE_DATA);
}
static void lance_tx_timeout (struct net_device *dev)
{
struct lance_private *lp = (struct lance_private *) dev->ml_priv;
int ioaddr = dev->base_addr;
outw (0, ioaddr + LANCE_ADDR);
printk ("%s: transmit timed out, status %4.4x, resetting.\n",
dev->name, inw (ioaddr + LANCE_DATA));
outw (0x0004, ioaddr + LANCE_DATA);
dev->stats.tx_errors++;
#ifndef final_version
if (lance_debug > 3) {
int i;
printk (" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
lp->dirty_tx, lp->cur_tx, netif_queue_stopped(dev) ? " (full)" : "",
lp->cur_rx);
for (i = 0; i < RX_RING_SIZE; i++)
printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
lp->rx_ring[i].base, -lp->rx_ring[i].buf_length,
lp->rx_ring[i].msg_length);
for (i = 0; i < TX_RING_SIZE; i++)
printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
lp->tx_ring[i].base, -lp->tx_ring[i].length,
lp->tx_ring[i].misc);
printk ("\n");
}
#endif
lance_restart (dev, 0x0043, 1);
dev->trans_start = jiffies;
netif_wake_queue (dev);
}
static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct lance_private *lp = dev->ml_priv;
int ioaddr = dev->base_addr;
int entry;
unsigned long flags;
spin_lock_irqsave(&lp->devlock, flags);
if (lance_debug > 3) {
outw(0x0000, ioaddr+LANCE_ADDR);
printk("%s: lance_start_xmit() called, csr0 %4.4x.\n", dev->name,
inw(ioaddr+LANCE_DATA));
outw(0x0000, ioaddr+LANCE_DATA);
}
entry = lp->cur_tx & TX_RING_MOD_MASK;
if (chip_table[lp->chip_version].flags & LANCE_MUST_PAD) {
if (skb->len < ETH_ZLEN) {
if (skb_padto(skb, ETH_ZLEN))
goto out;
lp->tx_ring[entry].length = -ETH_ZLEN;
}
else
lp->tx_ring[entry].length = -skb->len;
} else
lp->tx_ring[entry].length = -skb->len;
lp->tx_ring[entry].misc = 0x0000;
dev->stats.tx_bytes += skb->len;
if ((u32)isa_virt_to_bus(skb->data) + skb->len > 0x01000000) {
if (lance_debug > 5)
printk("%s: bouncing a high-memory packet (%#x).\n",
dev->name, (u32)isa_virt_to_bus(skb->data));
skb_copy_from_linear_data(skb, &lp->tx_bounce_buffs[entry], skb->len);
lp->tx_ring[entry].base =
((u32)isa_virt_to_bus((lp->tx_bounce_buffs + entry)) & 0xffffff) | 0x83000000;
dev_kfree_skb(skb);
} else {
lp->tx_skbuff[entry] = skb;
lp->tx_ring[entry].base = ((u32)isa_virt_to_bus(skb->data) & 0xffffff) | 0x83000000;
}
lp->cur_tx++;
outw(0x0000, ioaddr+LANCE_ADDR);
outw(0x0048, ioaddr+LANCE_DATA);
if ((lp->cur_tx - lp->dirty_tx) >= TX_RING_SIZE)
netif_stop_queue(dev);
out:
spin_unlock_irqrestore(&lp->devlock, flags);
return NETDEV_TX_OK;
}
static irqreturn_t lance_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct lance_private *lp;
int csr0, ioaddr, boguscnt=10;
int must_restart;
ioaddr = dev->base_addr;
lp = dev->ml_priv;
spin_lock (&lp->devlock);
outw(0x00, dev->base_addr + LANCE_ADDR);
while ((csr0 = inw(dev->base_addr + LANCE_DATA)) & 0x8600 &&
--boguscnt >= 0) {
outw(csr0 & ~0x004f, dev->base_addr + LANCE_DATA);
must_restart = 0;
if (lance_debug > 5)
printk("%s: interrupt csr0=%#2.2x new csr=%#2.2x.\n",
dev->name, csr0, inw(dev->base_addr + LANCE_DATA));
if (csr0 & 0x0400)
lance_rx(dev);
if (csr0 & 0x0200) {
int dirty_tx = lp->dirty_tx;
while (dirty_tx < lp->cur_tx) {
int entry = dirty_tx & TX_RING_MOD_MASK;
int status = lp->tx_ring[entry].base;
if (status < 0)
break;
lp->tx_ring[entry].base = 0;
if (status & 0x40000000) {
int err_status = lp->tx_ring[entry].misc;
dev->stats.tx_errors++;
if (err_status & 0x0400)
dev->stats.tx_aborted_errors++;
if (err_status & 0x0800)
dev->stats.tx_carrier_errors++;
if (err_status & 0x1000)
dev->stats.tx_window_errors++;
if (err_status & 0x4000) {
dev->stats.tx_fifo_errors++;
printk("%s: Tx FIFO error! Status %4.4x.\n",
dev->name, csr0);
must_restart = 1;
}
} else {
if (status & 0x18000000)
dev->stats.collisions++;
dev->stats.tx_packets++;
}
if (lp->tx_skbuff[entry]) {
dev_kfree_skb_irq(lp->tx_skbuff[entry]);
lp->tx_skbuff[entry] = NULL;
}
dirty_tx++;
}
#ifndef final_version
if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
printk("out-of-sync dirty pointer, %d vs. %d, full=%s.\n",
dirty_tx, lp->cur_tx,
netif_queue_stopped(dev) ? "yes" : "no");
dirty_tx += TX_RING_SIZE;
}
#endif
if (netif_queue_stopped(dev) &&
dirty_tx > lp->cur_tx - TX_RING_SIZE + 2)
netif_wake_queue (dev);
lp->dirty_tx = dirty_tx;
}
if (csr0 & 0x4000)
dev->stats.tx_errors++;
if (csr0 & 0x1000)
dev->stats.rx_errors++;
if (csr0 & 0x0800) {
printk("%s: Bus master arbitration failure, status %4.4x.\n",
dev->name, csr0);
must_restart = 1;
}
if (must_restart) {
outw(0x0000, dev->base_addr + LANCE_ADDR);
outw(0x0004, dev->base_addr + LANCE_DATA);
lance_restart(dev, 0x0002, 0);
}
}
outw(0x0000, dev->base_addr + LANCE_ADDR);
outw(0x7940, dev->base_addr + LANCE_DATA);
if (lance_debug > 4)
printk("%s: exiting interrupt, csr%d=%#4.4x.\n",
dev->name, inw(ioaddr + LANCE_ADDR),
inw(dev->base_addr + LANCE_DATA));
spin_unlock (&lp->devlock);
return IRQ_HANDLED;
}
static int
lance_rx(struct net_device *dev)
{
struct lance_private *lp = dev->ml_priv;
int entry = lp->cur_rx & RX_RING_MOD_MASK;
int i;
while (lp->rx_ring[entry].base >= 0) {
int status = lp->rx_ring[entry].base >> 24;
if (status != 0x03) {
if (status & 0x01)
dev->stats.rx_errors++;
if (status & 0x20)
dev->stats.rx_frame_errors++;
if (status & 0x10)
dev->stats.rx_over_errors++;
if (status & 0x08)
dev->stats.rx_crc_errors++;
if (status & 0x04)
dev->stats.rx_fifo_errors++;
lp->rx_ring[entry].base &= 0x03ffffff;
}
else
{
short pkt_len = (lp->rx_ring[entry].msg_length & 0xfff)-4;
struct sk_buff *skb;
if(pkt_len<60)
{
printk("%s: Runt packet!\n",dev->name);
dev->stats.rx_errors++;
}
else
{
skb = dev_alloc_skb(pkt_len+2);
if (skb == NULL)
{
printk("%s: Memory squeeze, deferring packet.\n", dev->name);
for (i=0; i < RX_RING_SIZE; i++)
if (lp->rx_ring[(entry+i) & RX_RING_MOD_MASK].base < 0)
break;
if (i > RX_RING_SIZE -2)
{
dev->stats.rx_dropped++;
lp->rx_ring[entry].base |= 0x80000000;
lp->cur_rx++;
}
break;
}
skb_reserve(skb,2);
skb_put(skb,pkt_len);
skb_copy_to_linear_data(skb,
(unsigned char *)isa_bus_to_virt((lp->rx_ring[entry].base & 0x00ffffff)),
pkt_len);
skb->protocol=eth_type_trans(skb,dev);
netif_rx(skb);
dev->stats.rx_packets++;
dev->stats.rx_bytes += pkt_len;
}
}
lp->rx_ring[entry].buf_length = -PKT_BUF_SZ;
lp->rx_ring[entry].base |= 0x80000000;
entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
}
return 0;
}
static int
lance_close(struct net_device *dev)
{
int ioaddr = dev->base_addr;
struct lance_private *lp = dev->ml_priv;
netif_stop_queue (dev);
if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
outw(112, ioaddr+LANCE_ADDR);
dev->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
}
outw(0, ioaddr+LANCE_ADDR);
if (lance_debug > 1)
printk("%s: Shutting down ethercard, status was %2.2x.\n",
dev->name, inw(ioaddr+LANCE_DATA));
outw(0x0004, ioaddr+LANCE_DATA);
if (dev->dma != 4)
{
unsigned long flags=claim_dma_lock();
disable_dma(dev->dma);
release_dma_lock(flags);
}
free_irq(dev->irq, dev);
lance_purge_ring(dev);
return 0;
}
static struct net_device_stats *lance_get_stats(struct net_device *dev)
{
struct lance_private *lp = dev->ml_priv;
if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
short ioaddr = dev->base_addr;
short saved_addr;
unsigned long flags;
spin_lock_irqsave(&lp->devlock, flags);
saved_addr = inw(ioaddr+LANCE_ADDR);
outw(112, ioaddr+LANCE_ADDR);
dev->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
outw(saved_addr, ioaddr+LANCE_ADDR);
spin_unlock_irqrestore(&lp->devlock, flags);
}
return &dev->stats;
}
static void set_multicast_list(struct net_device *dev)
{
short ioaddr = dev->base_addr;
outw(0, ioaddr+LANCE_ADDR);
outw(0x0004, ioaddr+LANCE_DATA);
if (dev->flags&IFF_PROMISC) {
outw(15, ioaddr+LANCE_ADDR);
outw(0x8000, ioaddr+LANCE_DATA);
} else {
short multicast_table[4];
int i;
int num_addrs=netdev_mc_count(dev);
if(dev->flags&IFF_ALLMULTI)
num_addrs=1;
memset(multicast_table, (num_addrs == 0) ? 0 : -1, sizeof(multicast_table));
for (i = 0; i < 4; i++) {
outw(8 + i, ioaddr+LANCE_ADDR);
outw(multicast_table[i], ioaddr+LANCE_DATA);
}
outw(15, ioaddr+LANCE_ADDR);
outw(0x0000, ioaddr+LANCE_DATA);
}
lance_restart(dev, 0x0142, 0);
}
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