2 * sgiseeq.c: Seeq8003 ethernet driver for SGI machines.
4 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/errno.h>
9 #include <linux/init.h>
10 #include <linux/types.h>
11 #include <linux/interrupt.h>
12 #include <linux/ioport.h>
13 #include <linux/socket.h>
15 #include <linux/route.h>
16 #include <linux/slab.h>
17 #include <linux/string.h>
18 #include <linux/delay.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/skbuff.h>
22 #include <linux/bitops.h>
24 #include <asm/byteorder.h>
26 #include <asm/system.h>
28 #include <asm/pgtable.h>
29 #include <asm/sgi/hpc3.h>
30 #include <asm/sgi/ip22.h>
31 #include <asm/sgialib.h>
35 static char *version = "sgiseeq.c: David S. Miller (dm@engr.sgi.com)\n";
37 static char *sgiseeqstr = "SGI Seeq8003";
40 * If you want speed, you do something silly, it always has worked for me. So,
41 * with that in mind, I've decided to make this driver look completely like a
42 * stupid Lance from a driver architecture perspective. Only difference is that
43 * here our "ring buffer" looks and acts like a real Lance one does but is
44 * layed out like how the HPC DMA and the Seeq want it to. You'd be surprised
45 * how a stupid idea like this can pay off in performance, not to mention
46 * making this driver 2,000 times easier to write. ;-)
49 /* Tune these if we tend to run out often etc. */
50 #define SEEQ_RX_BUFFERS 16
51 #define SEEQ_TX_BUFFERS 16
53 #define PKT_BUF_SZ 1584
55 #define NEXT_RX(i) (((i) + 1) & (SEEQ_RX_BUFFERS - 1))
56 #define NEXT_TX(i) (((i) + 1) & (SEEQ_TX_BUFFERS - 1))
57 #define PREV_RX(i) (((i) - 1) & (SEEQ_RX_BUFFERS - 1))
58 #define PREV_TX(i) (((i) - 1) & (SEEQ_TX_BUFFERS - 1))
60 #define TX_BUFFS_AVAIL(sp) ((sp->tx_old <= sp->tx_new) ? \
61 sp->tx_old + (SEEQ_TX_BUFFERS - 1) - sp->tx_new : \
62 sp->tx_old - sp->tx_new - 1)
66 struct sgiseeq_rx_desc {
67 volatile struct hpc_dma_desc rdma;
68 volatile signed int buf_vaddr;
71 struct sgiseeq_tx_desc {
72 volatile struct hpc_dma_desc tdma;
73 volatile signed int buf_vaddr;
77 * Warning: This structure is layed out in a certain way because HPC dma
78 * descriptors must be 8-byte aligned. So don't touch this without
81 struct sgiseeq_init_block { /* Note the name ;-) */
82 struct sgiseeq_rx_desc rxvector[SEEQ_RX_BUFFERS];
83 struct sgiseeq_tx_desc txvector[SEEQ_TX_BUFFERS];
86 struct sgiseeq_private {
87 struct sgiseeq_init_block *srings;
89 /* Ptrs to the descriptors in uncached space. */
90 struct sgiseeq_rx_desc *rx_desc;
91 struct sgiseeq_tx_desc *tx_desc;
94 struct hpc3_ethregs *hregs;
95 struct sgiseeq_regs *sregs;
97 /* Ring entry counters. */
98 unsigned int rx_new, tx_new;
99 unsigned int rx_old, tx_old;
102 unsigned char control;
105 struct net_device_stats stats;
107 struct net_device *next_module;
111 /* A list of all installed seeq devices, for removing the driver module. */
112 static struct net_device *root_sgiseeq_dev;
114 static inline void hpc3_eth_reset(struct hpc3_ethregs *hregs)
116 hregs->rx_reset = HPC3_ERXRST_CRESET | HPC3_ERXRST_CLRIRQ;
121 static inline void reset_hpc3_and_seeq(struct hpc3_ethregs *hregs,
122 struct sgiseeq_regs *sregs)
124 hregs->rx_ctrl = hregs->tx_ctrl = 0;
125 hpc3_eth_reset(hregs);
128 #define RSTAT_GO_BITS (SEEQ_RCMD_IGOOD | SEEQ_RCMD_IEOF | SEEQ_RCMD_ISHORT | \
129 SEEQ_RCMD_IDRIB | SEEQ_RCMD_ICRC)
131 static inline void seeq_go(struct sgiseeq_private *sp,
132 struct hpc3_ethregs *hregs,
133 struct sgiseeq_regs *sregs)
135 sregs->rstat = sp->mode | RSTAT_GO_BITS;
136 hregs->rx_ctrl = HPC3_ERXCTRL_ACTIVE;
139 static inline void __sgiseeq_set_mac_address(struct net_device *dev)
141 struct sgiseeq_private *sp = netdev_priv(dev);
142 struct sgiseeq_regs *sregs = sp->sregs;
145 sregs->tstat = SEEQ_TCMD_RB0;
146 for (i = 0; i < 6; i++)
147 sregs->rw.eth_addr[i] = dev->dev_addr[i];
150 static int sgiseeq_set_mac_address(struct net_device *dev, void *addr)
152 struct sgiseeq_private *sp = netdev_priv(dev);
153 struct sockaddr *sa = addr;
155 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
157 spin_lock_irq(&sp->tx_lock);
158 __sgiseeq_set_mac_address(dev);
159 spin_unlock_irq(&sp->tx_lock);
164 #define TCNTINFO_INIT (HPCDMA_EOX | HPCDMA_ETXD)
165 #define RCNTCFG_INIT (HPCDMA_OWN | HPCDMA_EORP | HPCDMA_XIE)
166 #define RCNTINFO_INIT (RCNTCFG_INIT | (PKT_BUF_SZ & HPCDMA_BCNT))
168 static int seeq_init_ring(struct net_device *dev)
170 struct sgiseeq_private *sp = netdev_priv(dev);
173 netif_stop_queue(dev);
174 sp->rx_new = sp->tx_new = 0;
175 sp->rx_old = sp->tx_old = 0;
177 __sgiseeq_set_mac_address(dev);
180 for(i = 0; i < SEEQ_TX_BUFFERS; i++) {
181 if (!sp->tx_desc[i].tdma.pbuf) {
182 unsigned long buffer;
184 buffer = (unsigned long) kmalloc(PKT_BUF_SZ, GFP_KERNEL);
187 sp->tx_desc[i].buf_vaddr = CKSEG1ADDR(buffer);
188 sp->tx_desc[i].tdma.pbuf = CPHYSADDR(buffer);
190 sp->tx_desc[i].tdma.cntinfo = TCNTINFO_INIT;
193 /* And now the rx ring. */
194 for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
195 if (!sp->rx_desc[i].rdma.pbuf) {
196 unsigned long buffer;
198 buffer = (unsigned long) kmalloc(PKT_BUF_SZ, GFP_KERNEL);
201 sp->rx_desc[i].buf_vaddr = CKSEG1ADDR(buffer);
202 sp->rx_desc[i].rdma.pbuf = CPHYSADDR(buffer);
204 sp->rx_desc[i].rdma.cntinfo = RCNTINFO_INIT;
206 sp->rx_desc[i - 1].rdma.cntinfo |= HPCDMA_EOR;
211 static struct sgiseeq_private *gpriv;
212 static struct net_device *gdev;
214 void sgiseeq_dump_rings(void)
217 struct sgiseeq_rx_desc *r = gpriv->rx_desc;
218 struct sgiseeq_tx_desc *t = gpriv->tx_desc;
219 struct hpc3_ethregs *hregs = gpriv->hregs;
225 printk("RING DUMP:\n");
226 for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
227 printk("RX [%d]: @(%p) [%08x,%08x,%08x] ",
228 i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
231 printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
232 i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
235 for (i = 0; i < SEEQ_TX_BUFFERS; i++) {
236 printk("TX [%d]: @(%p) [%08x,%08x,%08x] ",
237 i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
240 printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
241 i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
244 printk("INFO: [rx_new = %d rx_old=%d] [tx_new = %d tx_old = %d]\n",
245 gpriv->rx_new, gpriv->rx_old, gpriv->tx_new, gpriv->tx_old);
246 printk("RREGS: rx_cbptr[%08x] rx_ndptr[%08x] rx_ctrl[%08x]\n",
247 hregs->rx_cbptr, hregs->rx_ndptr, hregs->rx_ctrl);
248 printk("TREGS: tx_cbptr[%08x] tx_ndptr[%08x] tx_ctrl[%08x]\n",
249 hregs->tx_cbptr, hregs->tx_ndptr, hregs->tx_ctrl);
253 #define TSTAT_INIT_SEEQ (SEEQ_TCMD_IPT|SEEQ_TCMD_I16|SEEQ_TCMD_IC|SEEQ_TCMD_IUF)
254 #define TSTAT_INIT_EDLC ((TSTAT_INIT_SEEQ) | SEEQ_TCMD_RB2)
255 #define RDMACFG_INIT (HPC3_ERXDCFG_FRXDC | HPC3_ERXDCFG_FEOP | HPC3_ERXDCFG_FIRQ)
257 static int init_seeq(struct net_device *dev, struct sgiseeq_private *sp,
258 struct sgiseeq_regs *sregs)
260 struct hpc3_ethregs *hregs = sp->hregs;
263 reset_hpc3_and_seeq(hregs, sregs);
264 err = seeq_init_ring(dev);
268 /* Setup to field the proper interrupt types. */
270 sregs->tstat = TSTAT_INIT_EDLC;
271 sregs->rw.wregs.control = sp->control;
272 sregs->rw.wregs.frame_gap = 0;
274 sregs->tstat = TSTAT_INIT_SEEQ;
277 hregs->rx_dconfig |= RDMACFG_INIT;
279 hregs->rx_ndptr = CPHYSADDR(sp->rx_desc);
280 hregs->tx_ndptr = CPHYSADDR(sp->tx_desc);
282 seeq_go(sp, hregs, sregs);
286 static inline void record_rx_errors(struct sgiseeq_private *sp,
287 unsigned char status)
289 if (status & SEEQ_RSTAT_OVERF ||
290 status & SEEQ_RSTAT_SFRAME)
291 sp->stats.rx_over_errors++;
292 if (status & SEEQ_RSTAT_CERROR)
293 sp->stats.rx_crc_errors++;
294 if (status & SEEQ_RSTAT_DERROR)
295 sp->stats.rx_frame_errors++;
296 if (status & SEEQ_RSTAT_REOF)
297 sp->stats.rx_errors++;
300 static inline void rx_maybe_restart(struct sgiseeq_private *sp,
301 struct hpc3_ethregs *hregs,
302 struct sgiseeq_regs *sregs)
304 if (!(hregs->rx_ctrl & HPC3_ERXCTRL_ACTIVE)) {
305 hregs->rx_ndptr = CPHYSADDR(sp->rx_desc + sp->rx_new);
306 seeq_go(sp, hregs, sregs);
310 #define for_each_rx(rd, sp) for((rd) = &(sp)->rx_desc[(sp)->rx_new]; \
311 !((rd)->rdma.cntinfo & HPCDMA_OWN); \
312 (rd) = &(sp)->rx_desc[(sp)->rx_new])
314 static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp,
315 struct hpc3_ethregs *hregs,
316 struct sgiseeq_regs *sregs)
318 struct sgiseeq_rx_desc *rd;
319 struct sk_buff *skb = 0;
320 unsigned char pkt_status;
321 unsigned char *pkt_pointer = 0;
323 unsigned int orig_end = PREV_RX(sp->rx_new);
325 /* Service every received packet. */
326 for_each_rx(rd, sp) {
327 len = PKT_BUF_SZ - (rd->rdma.cntinfo & HPCDMA_BCNT) - 3;
328 pkt_pointer = (unsigned char *)(long)rd->buf_vaddr;
329 pkt_status = pkt_pointer[len + 2];
331 if (pkt_status & SEEQ_RSTAT_FIG) {
333 skb = dev_alloc_skb(len + 2);
340 /* Copy out of kseg1 to avoid silly cache flush. */
341 eth_copy_and_sum(skb, pkt_pointer + 2, len, 0);
342 skb->protocol = eth_type_trans(skb, dev);
344 /* We don't want to receive our own packets */
345 if (memcmp(eth_hdr(skb)->h_source, dev->dev_addr, ETH_ALEN)) {
347 dev->last_rx = jiffies;
348 sp->stats.rx_packets++;
349 sp->stats.rx_bytes += len;
351 /* Silently drop my own packets */
352 dev_kfree_skb_irq(skb);
355 printk (KERN_NOTICE "%s: Memory squeeze, deferring packet.\n",
357 sp->stats.rx_dropped++;
360 record_rx_errors(sp, pkt_status);
363 /* Return the entry to the ring pool. */
364 rd->rdma.cntinfo = RCNTINFO_INIT;
365 sp->rx_new = NEXT_RX(sp->rx_new);
367 sp->rx_desc[orig_end].rdma.cntinfo &= ~(HPCDMA_EOR);
368 sp->rx_desc[PREV_RX(sp->rx_new)].rdma.cntinfo |= HPCDMA_EOR;
369 rx_maybe_restart(sp, hregs, sregs);
372 static inline void tx_maybe_reset_collisions(struct sgiseeq_private *sp,
373 struct sgiseeq_regs *sregs)
376 sregs->rw.wregs.control = sp->control & ~(SEEQ_CTRL_XCNT);
377 sregs->rw.wregs.control = sp->control;
381 static inline void kick_tx(struct sgiseeq_tx_desc *td,
382 struct hpc3_ethregs *hregs)
384 /* If the HPC aint doin nothin, and there are more packets
385 * with ETXD cleared and XIU set we must make very certain
386 * that we restart the HPC else we risk locking up the
387 * adapter. The following code is only safe iff the HPCDMA
390 while ((td->tdma.cntinfo & (HPCDMA_XIU | HPCDMA_ETXD)) ==
391 (HPCDMA_XIU | HPCDMA_ETXD))
392 td = (struct sgiseeq_tx_desc *)(long) CKSEG1ADDR(td->tdma.pnext);
393 if (td->tdma.cntinfo & HPCDMA_XIU) {
394 hregs->tx_ndptr = CPHYSADDR(td);
395 hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
399 static inline void sgiseeq_tx(struct net_device *dev, struct sgiseeq_private *sp,
400 struct hpc3_ethregs *hregs,
401 struct sgiseeq_regs *sregs)
403 struct sgiseeq_tx_desc *td;
404 unsigned long status = hregs->tx_ctrl;
407 tx_maybe_reset_collisions(sp, sregs);
409 if (!(status & (HPC3_ETXCTRL_ACTIVE | SEEQ_TSTAT_PTRANS))) {
410 /* Oops, HPC detected some sort of error. */
411 if (status & SEEQ_TSTAT_R16)
412 sp->stats.tx_aborted_errors++;
413 if (status & SEEQ_TSTAT_UFLOW)
414 sp->stats.tx_fifo_errors++;
415 if (status & SEEQ_TSTAT_LCLS)
416 sp->stats.collisions++;
420 for (j = sp->tx_old; j != sp->tx_new; j = NEXT_TX(j)) {
421 td = &sp->tx_desc[j];
423 if (!(td->tdma.cntinfo & (HPCDMA_XIU)))
425 if (!(td->tdma.cntinfo & (HPCDMA_ETXD))) {
426 if (!(status & HPC3_ETXCTRL_ACTIVE)) {
427 hregs->tx_ndptr = CPHYSADDR(td);
428 hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
432 sp->stats.tx_packets++;
433 sp->tx_old = NEXT_TX(sp->tx_old);
434 td->tdma.cntinfo &= ~(HPCDMA_XIU | HPCDMA_XIE);
435 td->tdma.cntinfo |= HPCDMA_EOX;
439 static irqreturn_t sgiseeq_interrupt(int irq, void *dev_id, struct pt_regs *regs)
441 struct net_device *dev = (struct net_device *) dev_id;
442 struct sgiseeq_private *sp = netdev_priv(dev);
443 struct hpc3_ethregs *hregs = sp->hregs;
444 struct sgiseeq_regs *sregs = sp->sregs;
446 spin_lock(&sp->tx_lock);
448 /* Ack the IRQ and set software state. */
449 hregs->rx_reset = HPC3_ERXRST_CLRIRQ;
451 /* Always check for received packets. */
452 sgiseeq_rx(dev, sp, hregs, sregs);
454 /* Only check for tx acks if we have something queued. */
455 if (sp->tx_old != sp->tx_new)
456 sgiseeq_tx(dev, sp, hregs, sregs);
458 if ((TX_BUFFS_AVAIL(sp) > 0) && netif_queue_stopped(dev)) {
459 netif_wake_queue(dev);
461 spin_unlock(&sp->tx_lock);
466 static int sgiseeq_open(struct net_device *dev)
468 struct sgiseeq_private *sp = netdev_priv(dev);
469 struct sgiseeq_regs *sregs = sp->sregs;
470 unsigned int irq = dev->irq;
473 if (request_irq(irq, sgiseeq_interrupt, 0, sgiseeqstr, dev)) {
474 printk(KERN_ERR "Seeq8003: Can't get irq %d\n", dev->irq);
478 err = init_seeq(dev, sp, sregs);
482 netif_start_queue(dev);
492 static int sgiseeq_close(struct net_device *dev)
494 struct sgiseeq_private *sp = netdev_priv(dev);
495 struct sgiseeq_regs *sregs = sp->sregs;
497 netif_stop_queue(dev);
499 /* Shutdown the Seeq. */
500 reset_hpc3_and_seeq(sp->hregs, sregs);
505 static inline int sgiseeq_reset(struct net_device *dev)
507 struct sgiseeq_private *sp = netdev_priv(dev);
508 struct sgiseeq_regs *sregs = sp->sregs;
511 err = init_seeq(dev, sp, sregs);
515 dev->trans_start = jiffies;
516 netif_wake_queue(dev);
521 void sgiseeq_my_reset(void)
527 static int sgiseeq_start_xmit(struct sk_buff *skb, struct net_device *dev)
529 struct sgiseeq_private *sp = netdev_priv(dev);
530 struct hpc3_ethregs *hregs = sp->hregs;
532 struct sgiseeq_tx_desc *td;
533 int skblen, len, entry;
535 spin_lock_irqsave(&sp->tx_lock, flags);
539 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
540 sp->stats.tx_bytes += len;
542 td = &sp->tx_desc[entry];
544 /* Create entry. There are so many races with adding a new
545 * descriptor to the chain:
546 * 1) Assume that the HPC is off processing a DMA chain while
547 * we are changing all of the following.
548 * 2) Do no allow the HPC to look at a new descriptor until
549 * we have completely set up it's state. This means, do
550 * not clear HPCDMA_EOX in the current last descritptor
551 * until the one we are adding looks consistent and could
552 * be processes right now.
553 * 3) The tx interrupt code must notice when we've added a new
554 * entry and the HPC got to the end of the chain before we
555 * added this new entry and restarted it.
557 memcpy((char *)(long)td->buf_vaddr, skb->data, skblen);
559 memset((char *)(long)td->buf_vaddr + skb->len, 0, len-skblen);
560 td->tdma.cntinfo = (len & HPCDMA_BCNT) |
561 HPCDMA_XIU | HPCDMA_EOXP | HPCDMA_XIE | HPCDMA_EOX;
562 if (sp->tx_old != sp->tx_new) {
563 struct sgiseeq_tx_desc *backend;
565 backend = &sp->tx_desc[PREV_TX(sp->tx_new)];
566 backend->tdma.cntinfo &= ~HPCDMA_EOX;
568 sp->tx_new = NEXT_TX(sp->tx_new); /* Advance. */
570 /* Maybe kick the HPC back into motion. */
571 if (!(hregs->tx_ctrl & HPC3_ETXCTRL_ACTIVE))
572 kick_tx(&sp->tx_desc[sp->tx_old], hregs);
574 dev->trans_start = jiffies;
577 if (!TX_BUFFS_AVAIL(sp))
578 netif_stop_queue(dev);
579 spin_unlock_irqrestore(&sp->tx_lock, flags);
584 static void timeout(struct net_device *dev)
586 printk(KERN_NOTICE "%s: transmit timed out, resetting\n", dev->name);
589 dev->trans_start = jiffies;
590 netif_wake_queue(dev);
593 static struct net_device_stats *sgiseeq_get_stats(struct net_device *dev)
595 struct sgiseeq_private *sp = netdev_priv(dev);
600 static void sgiseeq_set_multicast(struct net_device *dev)
602 struct sgiseeq_private *sp = (struct sgiseeq_private *) dev->priv;
603 unsigned char oldmode = sp->mode;
605 if(dev->flags & IFF_PROMISC)
606 sp->mode = SEEQ_RCMD_RANY;
607 else if ((dev->flags & IFF_ALLMULTI) || dev->mc_count)
608 sp->mode = SEEQ_RCMD_RBMCAST;
610 sp->mode = SEEQ_RCMD_RBCAST;
612 /* XXX I know this sucks, but is there a better way to reprogram
613 * XXX the receiver? At least, this shouldn't happen too often.
616 if (oldmode != sp->mode)
620 static inline void setup_tx_ring(struct sgiseeq_tx_desc *buf, int nbufs)
624 while (i < (nbufs - 1)) {
625 buf[i].tdma.pnext = CPHYSADDR(buf + i + 1);
626 buf[i].tdma.pbuf = 0;
629 buf[i].tdma.pnext = CPHYSADDR(buf);
632 static inline void setup_rx_ring(struct sgiseeq_rx_desc *buf, int nbufs)
636 while (i < (nbufs - 1)) {
637 buf[i].rdma.pnext = CPHYSADDR(buf + i + 1);
638 buf[i].rdma.pbuf = 0;
641 buf[i].rdma.pbuf = 0;
642 buf[i].rdma.pnext = CPHYSADDR(buf);
645 #define ALIGNED(x) ((((unsigned long)(x)) + 0xf) & ~(0xf))
647 static int sgiseeq_init(struct hpc3_regs* regs, int irq)
649 struct sgiseeq_init_block *sr;
650 struct sgiseeq_private *sp;
651 struct net_device *dev;
654 dev = alloc_etherdev(sizeof (struct sgiseeq_private));
656 printk(KERN_ERR "Sgiseeq: Etherdev alloc failed, aborting.\n");
660 sp = netdev_priv(dev);
662 /* Make private data page aligned */
663 sr = (struct sgiseeq_init_block *) get_zeroed_page(GFP_KERNEL);
665 printk(KERN_ERR "Sgiseeq: Page alloc failed, aborting.\n");
667 goto err_out_free_dev;
671 #define EADDR_NVOFS 250
672 for (i = 0; i < 3; i++) {
673 unsigned short tmp = ip22_nvram_read(EADDR_NVOFS / 2 + i);
675 dev->dev_addr[2 * i] = tmp >> 8;
676 dev->dev_addr[2 * i + 1] = tmp & 0xff;
683 sp->sregs = (struct sgiseeq_regs *) &hpc3c0->eth_ext[0];
684 sp->hregs = &hpc3c0->ethregs;
685 sp->name = sgiseeqstr;
686 sp->mode = SEEQ_RCMD_RBCAST;
688 sp->rx_desc = (struct sgiseeq_rx_desc *)
689 CKSEG1ADDR(ALIGNED(&sp->srings->rxvector[0]));
690 dma_cache_wback_inv((unsigned long)&sp->srings->rxvector,
691 sizeof(sp->srings->rxvector));
692 sp->tx_desc = (struct sgiseeq_tx_desc *)
693 CKSEG1ADDR(ALIGNED(&sp->srings->txvector[0]));
694 dma_cache_wback_inv((unsigned long)&sp->srings->txvector,
695 sizeof(sp->srings->txvector));
697 /* A couple calculations now, saves many cycles later. */
698 setup_rx_ring(sp->rx_desc, SEEQ_RX_BUFFERS);
699 setup_tx_ring(sp->tx_desc, SEEQ_TX_BUFFERS);
701 /* Reset the chip. */
702 hpc3_eth_reset(sp->hregs);
704 sp->is_edlc = !(sp->sregs->rw.rregs.collision_tx[0] & 0xff);
706 sp->control = SEEQ_CTRL_XCNT | SEEQ_CTRL_ACCNT |
707 SEEQ_CTRL_SFLAG | SEEQ_CTRL_ESHORT |
710 dev->open = sgiseeq_open;
711 dev->stop = sgiseeq_close;
712 dev->hard_start_xmit = sgiseeq_start_xmit;
713 dev->tx_timeout = timeout;
714 dev->watchdog_timeo = (200 * HZ) / 1000;
715 dev->get_stats = sgiseeq_get_stats;
716 dev->set_multicast_list = sgiseeq_set_multicast;
717 dev->set_mac_address = sgiseeq_set_mac_address;
720 if (register_netdev(dev)) {
721 printk(KERN_ERR "Sgiseeq: Cannot register net device, "
724 goto err_out_free_page;
727 printk(KERN_INFO "%s: SGI Seeq8003 ", dev->name);
728 for (i = 0; i < 6; i++)
729 printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':');
731 sp->next_module = root_sgiseeq_dev;
732 root_sgiseeq_dev = dev;
737 free_page((unsigned long) sp);
745 static int __init sgiseeq_probe(void)
749 /* On board adapter on 1st HPC is always present */
750 return sgiseeq_init(hpc3c0, SGI_ENET_IRQ);
753 static void __exit sgiseeq_exit(void)
755 struct net_device *next, *dev;
756 struct sgiseeq_private *sp;
759 for (dev = root_sgiseeq_dev; dev; dev = next) {
760 sp = (struct sgiseeq_private *) netdev_priv(dev);
761 next = sp->next_module;
763 unregister_netdev(dev);
765 free_page((unsigned long) sp);
770 module_init(sgiseeq_probe);
771 module_exit(sgiseeq_exit);
773 MODULE_LICENSE("GPL");