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/* $Id: sgiseeq.c,v 1.17 2000/03/27 23:02:57 ralf Exp $
*
* sgiseeq.c: Seeq8003 ethernet driver for SGI machines.
*
* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/segment.h>
#include <asm/system.h>
#include <asm/bitops.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <linux/errno.h>
#include <asm/byteorder.h>
#include <linux/socket.h>
#include <linux/route.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <asm/sgi/sgihpc.h>
#include <asm/sgi/sgint23.h>
#include <asm/sgialib.h>
#include "sgiseeq.h"
static char *version =
"sgiseeq.c: David S. Miller (dm@engr.sgi.com)\n";
static char *sgiseeqstr = "SGI Seeq8003";
/* If you want speed, you do something silly, it always has worked
* for me. So, with that in mind, I've decided to make this driver
* look completely like a stupid Lance from a driver architecture
* perspective. Only difference is that here our "ring buffer" looks
* and acts like a real Lance one does but is layed out like how the
* HPC DMA and the Seeq want it to. You'd be surprised how a stupid
* idea like this can pay off in performance, not to mention making
* this driver 2,000 times easier to write. ;-)
*/
/* Tune these if we tend to run out often etc. */
#define SEEQ_RX_BUFFERS 16
#define SEEQ_TX_BUFFERS 16
#define PKT_BUF_SZ 1584
#define NEXT_RX(i) (((i) + 1) & (SEEQ_RX_BUFFERS - 1))
#define NEXT_TX(i) (((i) + 1) & (SEEQ_TX_BUFFERS - 1))
#define PREV_RX(i) (((i) - 1) & (SEEQ_RX_BUFFERS - 1))
#define PREV_TX(i) (((i) - 1) & (SEEQ_TX_BUFFERS - 1))
#define TX_BUFFS_AVAIL(sp) ((sp->tx_old <= sp->tx_new) ? \
sp->tx_old + (SEEQ_TX_BUFFERS - 1) - sp->tx_new : \
sp->tx_old - sp->tx_new - 1)
#define DEBUG
struct sgiseeq_rx_desc {
struct hpc_dma_desc rdma;
signed int buf_vaddr;
};
struct sgiseeq_tx_desc {
struct hpc_dma_desc tdma;
signed int buf_vaddr;
};
/* Warning: This structure is layed out in a certain way because
* HPC dma descriptors must be 8-byte aligned. So don't
* touch this without some care.
*/
struct sgiseeq_init_block { /* Note the name ;-) */
/* Ptrs to the descriptors in KSEG1 uncached space. */
struct sgiseeq_rx_desc *rx_desc;
struct sgiseeq_tx_desc *tx_desc;
unsigned int _padding[30]; /* Pad out to largest cache line size. */
struct sgiseeq_rx_desc rxvector[SEEQ_RX_BUFFERS];
struct sgiseeq_tx_desc txvector[SEEQ_TX_BUFFERS];
};
struct sgiseeq_private {
volatile struct sgiseeq_init_block srings;
char *name;
volatile struct hpc3_ethregs *hregs;
volatile struct sgiseeq_regs *sregs;
/* Ring entry counters. */
unsigned int rx_new, tx_new;
unsigned int rx_old, tx_old;
int is_edlc;
unsigned char control;
unsigned char mode;
struct net_device_stats stats;
};
static inline void hpc3_eth_reset(volatile struct hpc3_ethregs *hregs)
{
hregs->rx_reset = (HPC3_ERXRST_CRESET | HPC3_ERXRST_CLRIRQ);
udelay(20);
hregs->rx_reset = 0;
}
static inline void reset_hpc3_and_seeq(volatile struct hpc3_ethregs *hregs,
volatile struct sgiseeq_regs *sregs)
{
hregs->rx_ctrl = hregs->tx_ctrl = 0;
hpc3_eth_reset(hregs);
}
#define RSTAT_GO_BITS (SEEQ_RCMD_IGOOD | SEEQ_RCMD_IEOF | SEEQ_RCMD_ISHORT | \
SEEQ_RCMD_IDRIB | SEEQ_RCMD_ICRC)
static inline void seeq_go(struct sgiseeq_private *sp,
volatile struct hpc3_ethregs *hregs,
volatile struct sgiseeq_regs *sregs)
{
sregs->rstat = sp->mode | RSTAT_GO_BITS;
hregs->rx_ctrl = HPC3_ERXCTRL_ACTIVE;
}
static inline void seeq_load_eaddr(struct net_device *dev,
volatile struct sgiseeq_regs *sregs)
{
int i;
sregs->tstat = SEEQ_TCMD_RB0;
for (i = 0; i < 6; i++)
sregs->rw.eth_addr[i] = dev->dev_addr[i];
}
#define TCNTINFO_INIT (HPCDMA_EOX | HPCDMA_ETXD)
#define RCNTCFG_INIT (HPCDMA_OWN | HPCDMA_EORP | HPCDMA_XIE)
#define RCNTINFO_INIT (RCNTCFG_INIT | (PKT_BUF_SZ & HPCDMA_BCNT))
static int seeq_init_ring(struct net_device *dev)
{
struct sgiseeq_private *sp = (struct sgiseeq_private *) dev->priv;
volatile struct sgiseeq_init_block *ib = &sp->srings;
int i;
netif_stop_queue(dev);
sp->rx_new = sp->tx_new = 0;
sp->rx_old = sp->tx_old = 0;
seeq_load_eaddr(dev, sp->sregs);
/* XXX for now just accept packets directly to us
* XXX and ether-broadcast. Will do multicast and
* XXX promiscuous mode later. -davem
*/
sp->mode = SEEQ_RCMD_RBCAST;
/* Setup tx ring. */
for(i = 0; i < SEEQ_TX_BUFFERS; i++) {
if(!ib->tx_desc[i].tdma.pbuf) {
unsigned long buffer;
buffer = (unsigned long) kmalloc(PKT_BUF_SZ, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
ib->tx_desc[i].buf_vaddr = KSEG1ADDR(buffer);
ib->tx_desc[i].tdma.pbuf = PHYSADDR(buffer);
// flush_cache_all();
}
ib->tx_desc[i].tdma.cntinfo = (TCNTINFO_INIT);
}
/* And now the rx ring. */
for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
if (!ib->rx_desc[i].rdma.pbuf) {
unsigned long buffer;
buffer = (unsigned long) kmalloc(PKT_BUF_SZ, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
ib->rx_desc[i].buf_vaddr = KSEG1ADDR(buffer);
ib->rx_desc[i].rdma.pbuf = PHYSADDR(buffer);
// flush_cache_all();
}
ib->rx_desc[i].rdma.cntinfo = (RCNTINFO_INIT);
}
ib->rx_desc[i - 1].rdma.cntinfo |= (HPCDMA_EOR);
return 0;
}
#ifdef DEBUG
static struct sgiseeq_private *gpriv;
static struct net_device *gdev;
void sgiseeq_dump_rings(void)
{
static int once;
struct sgiseeq_rx_desc *r = gpriv->srings.rx_desc;
struct sgiseeq_tx_desc *t = gpriv->srings.tx_desc;
volatile struct hpc3_ethregs *hregs = gpriv->hregs;
int i;
if(once)
return;
once++;
printk("RING DUMP:\n");
for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
printk("RX [%d]: @(%p) [%08x,%08x,%08x] ",
i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
r[i].rdma.pnext);
i += 1;
printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
r[i].rdma.pnext);
}
for (i = 0; i < SEEQ_TX_BUFFERS; i++) {
printk("TX [%d]: @(%p) [%08x,%08x,%08x] ",
i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
t[i].tdma.pnext);
i += 1;
printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
t[i].tdma.pnext);
}
printk("INFO: [rx_new = %d rx_old=%d] [tx_new = %d tx_old = %d]\n",
gpriv->rx_new, gpriv->rx_old, gpriv->tx_new, gpriv->tx_old);
printk("RREGS: rx_cbptr[%08x] rx_ndptr[%08x] rx_ctrl[%08x]\n",
hregs->rx_cbptr, hregs->rx_ndptr, hregs->rx_ctrl);
printk("TREGS: tx_cbptr[%08x] tx_ndptr[%08x] tx_ctrl[%08x]\n",
hregs->tx_cbptr, hregs->tx_ndptr, hregs->tx_ctrl);
}
#endif
#define TSTAT_INIT_SEEQ (SEEQ_TCMD_IPT|SEEQ_TCMD_I16|SEEQ_TCMD_IC|SEEQ_TCMD_IUF)
#define TSTAT_INIT_EDLC ((TSTAT_INIT_SEEQ) | SEEQ_TCMD_RB2)
#define RDMACFG_INIT (HPC3_ERXDCFG_FRXDC | HPC3_ERXDCFG_FEOP | HPC3_ERXDCFG_FIRQ)
static int init_seeq(struct net_device *dev, struct sgiseeq_private *sp,
volatile struct sgiseeq_regs *sregs)
{
volatile struct hpc3_ethregs *hregs = sp->hregs;
int err;
reset_hpc3_and_seeq(hregs, sregs);
err = seeq_init_ring(dev);
if (err)
return err;
/* Setup to field the proper interrupt types. */
if (sp->is_edlc) {
sregs->tstat = (TSTAT_INIT_EDLC);
sregs->rw.wregs.control = sp->control;
sregs->rw.wregs.frame_gap = 0;
} else {
sregs->tstat = (TSTAT_INIT_SEEQ);
}
hregs->rx_dconfig |= RDMACFG_INIT;
hregs->rx_ndptr = PHYSADDR(&sp->srings.rx_desc[0]);
hregs->tx_ndptr = PHYSADDR(&sp->srings.tx_desc[0]);
seeq_go(sp, hregs, sregs);
return 0;
}
static inline void record_rx_errors(struct sgiseeq_private *sp,
unsigned char status)
{
if (status & SEEQ_RSTAT_OVERF ||
status & SEEQ_RSTAT_SFRAME)
sp->stats.rx_over_errors++;
if (status & SEEQ_RSTAT_CERROR)
sp->stats.rx_crc_errors++;
if (status & SEEQ_RSTAT_DERROR)
sp->stats.rx_frame_errors++;
if (status & SEEQ_RSTAT_REOF)
sp->stats.rx_errors++;
}
static inline void rx_maybe_restart(struct sgiseeq_private *sp,
volatile struct hpc3_ethregs *hregs,
volatile struct sgiseeq_regs *sregs)
{
if (!(hregs->rx_ctrl & HPC3_ERXCTRL_ACTIVE)) {
hregs->rx_ndptr = PHYSADDR(&sp->srings.rx_desc[sp->rx_new]);
seeq_go(sp, hregs, sregs);
}
}
#define for_each_rx(rd, sp) for((rd) = &(sp)->srings.rx_desc[(sp)->rx_new]; \
!((rd)->rdma.cntinfo & HPCDMA_OWN); \
(rd) = &(sp)->srings.rx_desc[(sp)->rx_new])
static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp,
volatile struct hpc3_ethregs *hregs,
volatile struct sgiseeq_regs *sregs)
{
struct sgiseeq_rx_desc *rd;
struct sk_buff *skb = 0;
unsigned char pkt_status;
unsigned char *pkt_pointer = 0;
int len = 0;
unsigned int orig_end = PREV_RX(sp->rx_new);
/* Service every received packet. */
for_each_rx(rd, sp) {
len = (PKT_BUF_SZ - (rd->rdma.cntinfo & HPCDMA_BCNT) - 3);
pkt_pointer = (unsigned char *)(long)rd->buf_vaddr;
pkt_status = pkt_pointer[len + 2];
if (pkt_status & SEEQ_RSTAT_FIG) {
/* Packet is OK. */
skb = dev_alloc_skb(len + 2);
if (skb) {
skb->dev = dev;
skb_reserve(skb, 2);
skb_put(skb, len);
/* Copy out of kseg1 to avoid silly cache flush. */
eth_copy_and_sum(skb, pkt_pointer + 2, len, 0);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
dev->last_rx = jiffies;
sp->stats.rx_packets++;
sp->stats.rx_bytes += len;
} else {
printk ("%s: Memory squeeze, deferring packet.\n",
dev->name);
sp->stats.rx_dropped++;
}
} else {
record_rx_errors(sp, pkt_status);
}
/* Return the entry to the ring pool. */
rd->rdma.cntinfo = (RCNTINFO_INIT);
sp->rx_new = NEXT_RX(sp->rx_new);
}
sp->srings.rx_desc[orig_end].rdma.cntinfo &= ~(HPCDMA_EOR);
sp->srings.rx_desc[PREV_RX(sp->rx_new)].rdma.cntinfo |= HPCDMA_EOR;
rx_maybe_restart(sp, hregs, sregs);
}
static inline void tx_maybe_reset_collisions(struct sgiseeq_private *sp,
volatile struct sgiseeq_regs *sregs)
{
if (sp->is_edlc) {
sregs->rw.wregs.control = sp->control & ~(SEEQ_CTRL_XCNT);
sregs->rw.wregs.control = sp->control;
}
}
static inline void kick_tx(struct sgiseeq_tx_desc *td,
volatile struct hpc3_ethregs *hregs)
{
/* If the HPC aint doin nothin, and there are more packets
* with ETXD cleared and XIU set we must make very certain
* that we restart the HPC else we risk locking up the
* adapter. The following code is only safe iff the HPCDMA
* is not active!
*/
while ((td->tdma.cntinfo & (HPCDMA_XIU | HPCDMA_ETXD)) ==
(HPCDMA_XIU | HPCDMA_ETXD))
td = (struct sgiseeq_tx_desc *)(long) KSEG1ADDR(td->tdma.pnext);
if (td->tdma.cntinfo & HPCDMA_XIU) {
hregs->tx_ndptr = PHYSADDR(td);
hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
}
}
static inline void sgiseeq_tx(struct net_device *dev, struct sgiseeq_private *sp,
volatile struct hpc3_ethregs *hregs,
volatile struct sgiseeq_regs *sregs)
{
struct sgiseeq_tx_desc *td;
unsigned long status = hregs->tx_ctrl;
int j;
tx_maybe_reset_collisions(sp, sregs);
if (!(status & (HPC3_ETXCTRL_ACTIVE | SEEQ_TSTAT_PTRANS))) {
/* Oops, HPC detected some sort of error. */
if (status & SEEQ_TSTAT_R16)
sp->stats.tx_aborted_errors++;
if (status & SEEQ_TSTAT_UFLOW)
sp->stats.tx_fifo_errors++;
if (status & SEEQ_TSTAT_LCLS)
sp->stats.collisions++;
}
/* Ack 'em... */
for (j = sp->tx_old; j != sp->tx_new; j = NEXT_TX(j)) {
td = &sp->srings.tx_desc[j];
if (!(td->tdma.cntinfo & (HPCDMA_XIU)))
break;
if (!(td->tdma.cntinfo & (HPCDMA_ETXD))) {
if(!(status & HPC3_ETXCTRL_ACTIVE)) {
hregs->tx_ndptr = PHYSADDR(td);
hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
}
break;
}
sp->stats.tx_packets++;
sp->tx_old = NEXT_TX(sp->tx_old);
td->tdma.cntinfo &= ~(HPCDMA_XIU | HPCDMA_XIE);
td->tdma.cntinfo |= HPCDMA_EOX;
}
}
static void sgiseeq_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *) dev_id;
struct sgiseeq_private *sp = (struct sgiseeq_private *) dev->priv;
volatile struct hpc3_ethregs *hregs = sp->hregs;
volatile struct sgiseeq_regs *sregs = sp->sregs;
/* Ack the IRQ and set software state. */
hregs->rx_reset = HPC3_ERXRST_CLRIRQ;
/* Always check for received packets. */
sgiseeq_rx(dev, sp, hregs, sregs);
/* Only check for tx acks iff we have something queued. */
if (sp->tx_old != sp->tx_new)
sgiseeq_tx(dev, sp, hregs, sregs);
if ((TX_BUFFS_AVAIL(sp) > 0) && netif_queue_stopped(dev)) {
netif_wake_queue(dev);
}
}
static int sgiseeq_open(struct net_device *dev)
{
struct sgiseeq_private *sp = (struct sgiseeq_private *)dev->priv;
volatile struct sgiseeq_regs *sregs = sp->sregs;
unsigned long flags;
int err;
save_flags(flags); cli();
if (request_irq(dev->irq, sgiseeq_interrupt, 0, sgiseeqstr, (void *) dev)) {
printk("Seeq8003: Can't get irq %d\n", dev->irq);
restore_flags(flags);
return -EAGAIN;
}
err = init_seeq(dev, sp, sregs);
if (err)
return err;
netif_start_queue(dev);
restore_flags(flags);
return 0;
}
static int sgiseeq_close(struct net_device *dev)
{
struct sgiseeq_private *sp = (struct sgiseeq_private *) dev->priv;
volatile struct sgiseeq_regs *sregs = sp->sregs;
netif_stop_queue(dev);
/* Shutdown the Seeq. */
reset_hpc3_and_seeq(sp->hregs, sregs);
free_irq(dev->irq, dev);
return 0;
}
static inline int sgiseeq_reset(struct net_device *dev)
{
struct sgiseeq_private *sp = (struct sgiseeq_private *) dev->priv;
volatile struct sgiseeq_regs *sregs = sp->sregs;
int err;
err = init_seeq(dev, sp, sregs);
if (err)
return err;
dev->trans_start = jiffies;
netif_wake_queue(dev);
return 0;
}
void sgiseeq_my_reset(void)
{
printk("RESET!\n");
sgiseeq_reset(gdev);
}
static int sgiseeq_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct sgiseeq_private *sp = (struct sgiseeq_private *) dev->priv;
volatile struct hpc3_ethregs *hregs = sp->hregs;
unsigned long flags;
struct sgiseeq_tx_desc *td;
int skblen, len, entry;
save_and_cli(flags);
/* Setup... */
skblen = skb->len;
len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
sp->stats.tx_bytes += len;
entry = sp->tx_new;
td = &sp->srings.tx_desc[entry];
/* Create entry. There are so many races with adding a new
* descriptor to the chain:
* 1) Assume that the HPC is off processing a DMA chain while
* we are changing all of the following.
* 2) Do no allow the HPC to look at a new descriptor until
* we have completely set up it's state. This means, do
* not clear HPCDMA_EOX in the current last descritptor
* until the one we are adding looks consistant and could
* be processes right now.
* 3) The tx interrupt code must notice when we've added a new
* entry and the HPC got to the end of the chain before we
* added this new entry and restarted it.
*/
memcpy((char *)(long)td->buf_vaddr, skb->data, skblen);
td->tdma.cntinfo = (len & HPCDMA_BCNT) |
(HPCDMA_XIU | HPCDMA_EOXP | HPCDMA_XIE | HPCDMA_EOX);
if (sp->tx_old != sp->tx_new) {
struct sgiseeq_tx_desc *backend;
backend = &sp->srings.tx_desc[PREV_TX(sp->tx_new)];
backend->tdma.cntinfo &= ~(HPCDMA_EOX);
}
sp->tx_new = NEXT_TX(sp->tx_new); /* Advance. */
/* Maybe kick the HPC back into motion. */
if (!(hregs->tx_ctrl & HPC3_ETXCTRL_ACTIVE))
kick_tx(&sp->srings.tx_desc[sp->tx_old], hregs);
dev->trans_start = jiffies;
dev_kfree_skb(skb);
if (!TX_BUFFS_AVAIL(sp))
netif_stop_queue(dev);
restore_flags(flags);
return 0;
}
static void timeout(struct net_device *dev)
{
printk("%s: transmit timed out, resetting\n", dev->name);
sgiseeq_reset(dev);
dev->trans_start = jiffies;
netif_wake_queue(dev);
}
static struct net_device_stats *sgiseeq_get_stats(struct net_device *dev)
{
struct sgiseeq_private *sp = (struct sgiseeq_private *) dev->priv;
return &sp->stats;
}
static void sgiseeq_set_multicast(struct net_device *dev)
{
}
static inline void setup_tx_ring(struct sgiseeq_tx_desc *buf, int nbufs)
{
int i = 0;
while (i < (nbufs - 1)) {
buf[i].tdma.pnext = PHYSADDR(&buf[i + 1]);
buf[i].tdma.pbuf = 0;
i++;
}
buf[i].tdma.pnext = PHYSADDR(&buf[0]);
}
static inline void setup_rx_ring(struct sgiseeq_rx_desc *buf, int nbufs)
{
int i = 0;
while (i < (nbufs - 1)) {
buf[i].rdma.pnext = PHYSADDR(&buf[i + 1]);
buf[i].rdma.pbuf = 0;
i++;
}
buf[i].rdma.pbuf = 0;
buf[i].rdma.pnext = PHYSADDR(&buf[0]);
}
static char onboard_eth_addr[6];
#define ALIGNED(x) ((((unsigned long)(x)) + 0xf) & ~(0xf))
int sgiseeq_init(struct net_device *dev, struct sgiseeq_regs *sregs,
struct hpc3_ethregs *hregs, int irq)
{
static unsigned version_printed;
int i;
struct sgiseeq_private *sp;
dev->priv = (struct sgiseeq_private *) get_free_page(GFP_KERNEL);
if (dev->priv == NULL)
return -ENOMEM;
if (!version_printed++)
printk(version);
printk("%s: SGI Seeq8003 ", dev->name);
for (i = 0; i < 6; i++)
printk("%2.2x%c",
dev->dev_addr[i] = onboard_eth_addr[i],
i == 5 ? ' ': ':');
printk("\n");
sp = (struct sgiseeq_private *) dev->priv;
#ifdef DEBUG
gpriv = sp;
gdev = dev;
#endif
memset((char *)dev->priv, 0, sizeof(struct sgiseeq_private));
sp->sregs = sregs;
sp->hregs = hregs;
sp->name = sgiseeqstr;
sp->srings.rx_desc = (struct sgiseeq_rx_desc *)
(KSEG1ADDR(ALIGNED(&sp->srings.rxvector[0])));
dma_cache_wback_inv((unsigned long)&sp->srings.rxvector,
sizeof(sp->srings.rxvector));
sp->srings.tx_desc = (struct sgiseeq_tx_desc *)
(KSEG1ADDR(ALIGNED(&sp->srings.txvector[0])));
dma_cache_wback_inv((unsigned long)&sp->srings.txvector,
sizeof(sp->srings.txvector));
/* A couple calculations now, saves many cycles later. */
setup_rx_ring(sp->srings.rx_desc, SEEQ_RX_BUFFERS);
setup_tx_ring(sp->srings.tx_desc, SEEQ_TX_BUFFERS);
/* Reset the chip. */
hpc3_eth_reset((volatile struct hpc3_ethregs *) hregs);
sp->is_edlc = !(sregs->rw.rregs.collision_tx[0] & 0xff);
if (sp->is_edlc) {
sp->control = (SEEQ_CTRL_XCNT | SEEQ_CTRL_ACCNT |
SEEQ_CTRL_SFLAG | SEEQ_CTRL_ESHORT |
SEEQ_CTRL_ENCARR);
}
dev->open = sgiseeq_open;
dev->stop = sgiseeq_close;
dev->hard_start_xmit = sgiseeq_start_xmit;
dev->tx_timeout = timeout;
dev->watchdog_timeo = (200 * HZ) / 1000;
dev->get_stats = sgiseeq_get_stats;
dev->set_multicast_list = sgiseeq_set_multicast;
dev->irq = irq;
dev->dma = 0;
ether_setup(dev);
return 0;
}
static inline unsigned char str2hexnum(unsigned char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
return 0; /* foo */
}
static inline void str2eaddr(unsigned char *ea, unsigned char *str)
{
int i;
for (i = 0; i < 6; i++) {
unsigned char num;
if(*str == ':')
str++;
num = str2hexnum(*str++) << 4;
num |= (str2hexnum(*str++));
ea[i] = num;
}
}
int sgiseeq_probe(struct net_device *dev)
{
static int initialized;
char *ep;
if (initialized) /* Already initialized? */
return 1;
initialized++;
/* First get the ethernet address of the onboard interface from ARCS.
* This is fragile; PROM doesn't like running from cache.
* On MIPS64 it crashes for some other, yet unknown reason ...
*/
ep = ArcGetEnvironmentVariable("eaddr");
str2eaddr(onboard_eth_addr, ep);
return sgiseeq_init(dev,
(struct sgiseeq_regs *) (KSEG1ADDR(0x1fbd4000)),
&hpc3c0->ethregs, SGI_ENET_IRQ);
}
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