2 * sgiseeq.c: Seeq8003 ethernet driver for SGI machines.
4 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/errno.h>
12 #include <linux/init.h>
13 #include <linux/types.h>
14 #include <linux/interrupt.h>
15 #include <linux/string.h>
16 #include <linux/delay.h>
17 #include <linux/netdevice.h>
18 #include <linux/platform_device.h>
19 #include <linux/etherdevice.h>
20 #include <linux/skbuff.h>
22 #include <asm/sgi/hpc3.h>
23 #include <asm/sgi/ip22.h>
24 #include <asm/sgi/seeq.h>
28 static char *sgiseeqstr = "SGI Seeq8003";
31 * If you want speed, you do something silly, it always has worked for me. So,
32 * with that in mind, I've decided to make this driver look completely like a
33 * stupid Lance from a driver architecture perspective. Only difference is that
34 * here our "ring buffer" looks and acts like a real Lance one does but is
35 * layed out like how the HPC DMA and the Seeq want it to. You'd be surprised
36 * how a stupid idea like this can pay off in performance, not to mention
37 * making this driver 2,000 times easier to write. ;-)
40 /* Tune these if we tend to run out often etc. */
41 #define SEEQ_RX_BUFFERS 16
42 #define SEEQ_TX_BUFFERS 16
44 #define PKT_BUF_SZ 1584
46 #define NEXT_RX(i) (((i) + 1) & (SEEQ_RX_BUFFERS - 1))
47 #define NEXT_TX(i) (((i) + 1) & (SEEQ_TX_BUFFERS - 1))
48 #define PREV_RX(i) (((i) - 1) & (SEEQ_RX_BUFFERS - 1))
49 #define PREV_TX(i) (((i) - 1) & (SEEQ_TX_BUFFERS - 1))
51 #define TX_BUFFS_AVAIL(sp) ((sp->tx_old <= sp->tx_new) ? \
52 sp->tx_old + (SEEQ_TX_BUFFERS - 1) - sp->tx_new : \
53 sp->tx_old - sp->tx_new - 1)
55 #define VIRT_TO_DMA(sp, v) ((sp)->srings_dma + \
56 (dma_addr_t)((unsigned long)(v) - \
57 (unsigned long)((sp)->rx_desc)))
59 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
60 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
62 static int rx_copybreak = 100;
64 #define PAD_SIZE (128 - sizeof(struct hpc_dma_desc) - sizeof(void *))
66 struct sgiseeq_rx_desc {
67 volatile struct hpc_dma_desc rdma;
72 struct sgiseeq_tx_desc {
73 volatile struct hpc_dma_desc tdma;
79 * Warning: This structure is layed out in a certain way because HPC dma
80 * descriptors must be 8-byte aligned. So don't touch this without
83 struct sgiseeq_init_block { /* Note the name ;-) */
84 struct sgiseeq_rx_desc rxvector[SEEQ_RX_BUFFERS];
85 struct sgiseeq_tx_desc txvector[SEEQ_TX_BUFFERS];
88 struct sgiseeq_private {
89 struct sgiseeq_init_block *srings;
90 dma_addr_t srings_dma;
92 /* Ptrs to the descriptors in uncached space. */
93 struct sgiseeq_rx_desc *rx_desc;
94 struct sgiseeq_tx_desc *tx_desc;
97 struct hpc3_ethregs *hregs;
98 struct sgiseeq_regs *sregs;
100 /* Ring entry counters. */
101 unsigned int rx_new, tx_new;
102 unsigned int rx_old, tx_old;
105 unsigned char control;
111 static inline void dma_sync_desc_cpu(struct net_device *dev, void *addr)
113 dma_cache_sync(dev->dev.parent, addr, sizeof(struct sgiseeq_rx_desc),
117 static inline void dma_sync_desc_dev(struct net_device *dev, void *addr)
119 dma_cache_sync(dev->dev.parent, addr, sizeof(struct sgiseeq_rx_desc),
123 static inline void hpc3_eth_reset(struct hpc3_ethregs *hregs)
125 hregs->reset = HPC3_ERST_CRESET | HPC3_ERST_CLRIRQ;
130 static inline void reset_hpc3_and_seeq(struct hpc3_ethregs *hregs,
131 struct sgiseeq_regs *sregs)
133 hregs->rx_ctrl = hregs->tx_ctrl = 0;
134 hpc3_eth_reset(hregs);
137 #define RSTAT_GO_BITS (SEEQ_RCMD_IGOOD | SEEQ_RCMD_IEOF | SEEQ_RCMD_ISHORT | \
138 SEEQ_RCMD_IDRIB | SEEQ_RCMD_ICRC)
140 static inline void seeq_go(struct sgiseeq_private *sp,
141 struct hpc3_ethregs *hregs,
142 struct sgiseeq_regs *sregs)
144 sregs->rstat = sp->mode | RSTAT_GO_BITS;
145 hregs->rx_ctrl = HPC3_ERXCTRL_ACTIVE;
148 static inline void __sgiseeq_set_mac_address(struct net_device *dev)
150 struct sgiseeq_private *sp = netdev_priv(dev);
151 struct sgiseeq_regs *sregs = sp->sregs;
154 sregs->tstat = SEEQ_TCMD_RB0;
155 for (i = 0; i < 6; i++)
156 sregs->rw.eth_addr[i] = dev->dev_addr[i];
159 static int sgiseeq_set_mac_address(struct net_device *dev, void *addr)
161 struct sgiseeq_private *sp = netdev_priv(dev);
162 struct sockaddr *sa = addr;
164 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
166 spin_lock_irq(&sp->tx_lock);
167 __sgiseeq_set_mac_address(dev);
168 spin_unlock_irq(&sp->tx_lock);
173 #define TCNTINFO_INIT (HPCDMA_EOX | HPCDMA_ETXD)
174 #define RCNTCFG_INIT (HPCDMA_OWN | HPCDMA_EORP | HPCDMA_XIE)
175 #define RCNTINFO_INIT (RCNTCFG_INIT | (PKT_BUF_SZ & HPCDMA_BCNT))
177 static int seeq_init_ring(struct net_device *dev)
179 struct sgiseeq_private *sp = netdev_priv(dev);
182 netif_stop_queue(dev);
183 sp->rx_new = sp->tx_new = 0;
184 sp->rx_old = sp->tx_old = 0;
186 __sgiseeq_set_mac_address(dev);
189 for(i = 0; i < SEEQ_TX_BUFFERS; i++) {
190 sp->tx_desc[i].tdma.cntinfo = TCNTINFO_INIT;
191 dma_sync_desc_dev(dev, &sp->tx_desc[i]);
194 /* And now the rx ring. */
195 for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
196 if (!sp->rx_desc[i].skb) {
198 struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ);
203 dma_addr = dma_map_single(dev->dev.parent,
205 PKT_BUF_SZ, DMA_FROM_DEVICE);
206 sp->rx_desc[i].skb = skb;
207 sp->rx_desc[i].rdma.pbuf = dma_addr;
209 sp->rx_desc[i].rdma.cntinfo = RCNTINFO_INIT;
210 dma_sync_desc_dev(dev, &sp->rx_desc[i]);
212 sp->rx_desc[i - 1].rdma.cntinfo |= HPCDMA_EOR;
213 dma_sync_desc_dev(dev, &sp->rx_desc[i - 1]);
217 static void seeq_purge_ring(struct net_device *dev)
219 struct sgiseeq_private *sp = netdev_priv(dev);
223 for (i = 0; i < SEEQ_TX_BUFFERS; i++) {
224 if (sp->tx_desc[i].skb) {
225 dev_kfree_skb(sp->tx_desc[i].skb);
226 sp->tx_desc[i].skb = NULL;
230 /* And now the rx ring. */
231 for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
232 if (sp->rx_desc[i].skb) {
233 dev_kfree_skb(sp->rx_desc[i].skb);
234 sp->rx_desc[i].skb = NULL;
240 static struct sgiseeq_private *gpriv;
241 static struct net_device *gdev;
243 static void sgiseeq_dump_rings(void)
246 struct sgiseeq_rx_desc *r = gpriv->rx_desc;
247 struct sgiseeq_tx_desc *t = gpriv->tx_desc;
248 struct hpc3_ethregs *hregs = gpriv->hregs;
254 printk("RING DUMP:\n");
255 for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
256 printk("RX [%d]: @(%p) [%08x,%08x,%08x] ",
257 i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
260 printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
261 i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
264 for (i = 0; i < SEEQ_TX_BUFFERS; i++) {
265 printk("TX [%d]: @(%p) [%08x,%08x,%08x] ",
266 i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
269 printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
270 i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
273 printk("INFO: [rx_new = %d rx_old=%d] [tx_new = %d tx_old = %d]\n",
274 gpriv->rx_new, gpriv->rx_old, gpriv->tx_new, gpriv->tx_old);
275 printk("RREGS: rx_cbptr[%08x] rx_ndptr[%08x] rx_ctrl[%08x]\n",
276 hregs->rx_cbptr, hregs->rx_ndptr, hregs->rx_ctrl);
277 printk("TREGS: tx_cbptr[%08x] tx_ndptr[%08x] tx_ctrl[%08x]\n",
278 hregs->tx_cbptr, hregs->tx_ndptr, hregs->tx_ctrl);
282 #define TSTAT_INIT_SEEQ (SEEQ_TCMD_IPT|SEEQ_TCMD_I16|SEEQ_TCMD_IC|SEEQ_TCMD_IUF)
283 #define TSTAT_INIT_EDLC ((TSTAT_INIT_SEEQ) | SEEQ_TCMD_RB2)
285 static int init_seeq(struct net_device *dev, struct sgiseeq_private *sp,
286 struct sgiseeq_regs *sregs)
288 struct hpc3_ethregs *hregs = sp->hregs;
291 reset_hpc3_and_seeq(hregs, sregs);
292 err = seeq_init_ring(dev);
296 /* Setup to field the proper interrupt types. */
298 sregs->tstat = TSTAT_INIT_EDLC;
299 sregs->rw.wregs.control = sp->control;
300 sregs->rw.wregs.frame_gap = 0;
302 sregs->tstat = TSTAT_INIT_SEEQ;
305 hregs->rx_ndptr = VIRT_TO_DMA(sp, sp->rx_desc);
306 hregs->tx_ndptr = VIRT_TO_DMA(sp, sp->tx_desc);
308 seeq_go(sp, hregs, sregs);
312 static void record_rx_errors(struct net_device *dev, unsigned char status)
314 if (status & SEEQ_RSTAT_OVERF ||
315 status & SEEQ_RSTAT_SFRAME)
316 dev->stats.rx_over_errors++;
317 if (status & SEEQ_RSTAT_CERROR)
318 dev->stats.rx_crc_errors++;
319 if (status & SEEQ_RSTAT_DERROR)
320 dev->stats.rx_frame_errors++;
321 if (status & SEEQ_RSTAT_REOF)
322 dev->stats.rx_errors++;
325 static inline void rx_maybe_restart(struct sgiseeq_private *sp,
326 struct hpc3_ethregs *hregs,
327 struct sgiseeq_regs *sregs)
329 if (!(hregs->rx_ctrl & HPC3_ERXCTRL_ACTIVE)) {
330 hregs->rx_ndptr = VIRT_TO_DMA(sp, sp->rx_desc + sp->rx_new);
331 seeq_go(sp, hregs, sregs);
335 static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp,
336 struct hpc3_ethregs *hregs,
337 struct sgiseeq_regs *sregs)
339 struct sgiseeq_rx_desc *rd;
340 struct sk_buff *skb = NULL;
341 struct sk_buff *newskb;
342 unsigned char pkt_status;
344 unsigned int orig_end = PREV_RX(sp->rx_new);
346 /* Service every received packet. */
347 rd = &sp->rx_desc[sp->rx_new];
348 dma_sync_desc_cpu(dev, rd);
349 while (!(rd->rdma.cntinfo & HPCDMA_OWN)) {
350 len = PKT_BUF_SZ - (rd->rdma.cntinfo & HPCDMA_BCNT) - 3;
351 dma_unmap_single(dev->dev.parent, rd->rdma.pbuf,
352 PKT_BUF_SZ, DMA_FROM_DEVICE);
353 pkt_status = rd->skb->data[len];
354 if (pkt_status & SEEQ_RSTAT_FIG) {
356 /* We don't want to receive our own packets */
357 if (memcmp(rd->skb->data + 6, dev->dev_addr, ETH_ALEN)) {
358 if (len > rx_copybreak) {
360 newskb = netdev_alloc_skb(dev, PKT_BUF_SZ);
366 skb_reserve(newskb, 2);
368 skb = netdev_alloc_skb(dev, len + 2);
371 skb_copy_to_linear_data(skb, rd->skb->data, len);
378 skb->protocol = eth_type_trans(skb, dev);
380 dev->last_rx = jiffies;
381 dev->stats.rx_packets++;
382 dev->stats.rx_bytes += len;
384 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n",
386 dev->stats.rx_dropped++;
389 /* Silently drop my own packets */
393 record_rx_errors(dev, pkt_status);
397 rd->rdma.pbuf = dma_map_single(dev->dev.parent,
399 PKT_BUF_SZ, DMA_FROM_DEVICE);
401 /* Return the entry to the ring pool. */
402 rd->rdma.cntinfo = RCNTINFO_INIT;
403 sp->rx_new = NEXT_RX(sp->rx_new);
404 dma_sync_desc_dev(dev, rd);
405 rd = &sp->rx_desc[sp->rx_new];
406 dma_sync_desc_cpu(dev, rd);
408 dma_sync_desc_cpu(dev, &sp->rx_desc[orig_end]);
409 sp->rx_desc[orig_end].rdma.cntinfo &= ~(HPCDMA_EOR);
410 dma_sync_desc_dev(dev, &sp->rx_desc[orig_end]);
411 dma_sync_desc_cpu(dev, &sp->rx_desc[PREV_RX(sp->rx_new)]);
412 sp->rx_desc[PREV_RX(sp->rx_new)].rdma.cntinfo |= HPCDMA_EOR;
413 dma_sync_desc_dev(dev, &sp->rx_desc[PREV_RX(sp->rx_new)]);
414 rx_maybe_restart(sp, hregs, sregs);
417 static inline void tx_maybe_reset_collisions(struct sgiseeq_private *sp,
418 struct sgiseeq_regs *sregs)
421 sregs->rw.wregs.control = sp->control & ~(SEEQ_CTRL_XCNT);
422 sregs->rw.wregs.control = sp->control;
426 static inline void kick_tx(struct net_device *dev,
427 struct sgiseeq_private *sp,
428 struct hpc3_ethregs *hregs)
430 struct sgiseeq_tx_desc *td;
433 /* If the HPC aint doin nothin, and there are more packets
434 * with ETXD cleared and XIU set we must make very certain
435 * that we restart the HPC else we risk locking up the
436 * adapter. The following code is only safe iff the HPCDMA
439 td = &sp->tx_desc[i];
440 dma_sync_desc_cpu(dev, td);
441 while ((td->tdma.cntinfo & (HPCDMA_XIU | HPCDMA_ETXD)) ==
442 (HPCDMA_XIU | HPCDMA_ETXD)) {
444 td = &sp->tx_desc[i];
445 dma_sync_desc_cpu(dev, td);
447 if (td->tdma.cntinfo & HPCDMA_XIU) {
448 hregs->tx_ndptr = VIRT_TO_DMA(sp, td);
449 hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
453 static inline void sgiseeq_tx(struct net_device *dev, struct sgiseeq_private *sp,
454 struct hpc3_ethregs *hregs,
455 struct sgiseeq_regs *sregs)
457 struct sgiseeq_tx_desc *td;
458 unsigned long status = hregs->tx_ctrl;
461 tx_maybe_reset_collisions(sp, sregs);
463 if (!(status & (HPC3_ETXCTRL_ACTIVE | SEEQ_TSTAT_PTRANS))) {
464 /* Oops, HPC detected some sort of error. */
465 if (status & SEEQ_TSTAT_R16)
466 dev->stats.tx_aborted_errors++;
467 if (status & SEEQ_TSTAT_UFLOW)
468 dev->stats.tx_fifo_errors++;
469 if (status & SEEQ_TSTAT_LCLS)
470 dev->stats.collisions++;
474 for (j = sp->tx_old; j != sp->tx_new; j = NEXT_TX(j)) {
475 td = &sp->tx_desc[j];
477 dma_sync_desc_cpu(dev, td);
478 if (!(td->tdma.cntinfo & (HPCDMA_XIU)))
480 if (!(td->tdma.cntinfo & (HPCDMA_ETXD))) {
481 if (!(status & HPC3_ETXCTRL_ACTIVE)) {
482 hregs->tx_ndptr = VIRT_TO_DMA(sp, td);
483 hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
487 dev->stats.tx_packets++;
488 sp->tx_old = NEXT_TX(sp->tx_old);
489 td->tdma.cntinfo &= ~(HPCDMA_XIU | HPCDMA_XIE);
490 td->tdma.cntinfo |= HPCDMA_EOX;
492 dev_kfree_skb_any(td->skb);
495 dma_sync_desc_dev(dev, td);
499 static irqreturn_t sgiseeq_interrupt(int irq, void *dev_id)
501 struct net_device *dev = (struct net_device *) dev_id;
502 struct sgiseeq_private *sp = netdev_priv(dev);
503 struct hpc3_ethregs *hregs = sp->hregs;
504 struct sgiseeq_regs *sregs = sp->sregs;
506 spin_lock(&sp->tx_lock);
508 /* Ack the IRQ and set software state. */
509 hregs->reset = HPC3_ERST_CLRIRQ;
511 /* Always check for received packets. */
512 sgiseeq_rx(dev, sp, hregs, sregs);
514 /* Only check for tx acks if we have something queued. */
515 if (sp->tx_old != sp->tx_new)
516 sgiseeq_tx(dev, sp, hregs, sregs);
518 if ((TX_BUFFS_AVAIL(sp) > 0) && netif_queue_stopped(dev)) {
519 netif_wake_queue(dev);
521 spin_unlock(&sp->tx_lock);
526 static int sgiseeq_open(struct net_device *dev)
528 struct sgiseeq_private *sp = netdev_priv(dev);
529 struct sgiseeq_regs *sregs = sp->sregs;
530 unsigned int irq = dev->irq;
533 if (request_irq(irq, sgiseeq_interrupt, 0, sgiseeqstr, dev)) {
534 printk(KERN_ERR "Seeq8003: Can't get irq %d\n", dev->irq);
538 err = init_seeq(dev, sp, sregs);
542 netif_start_queue(dev);
552 static int sgiseeq_close(struct net_device *dev)
554 struct sgiseeq_private *sp = netdev_priv(dev);
555 struct sgiseeq_regs *sregs = sp->sregs;
556 unsigned int irq = dev->irq;
558 netif_stop_queue(dev);
560 /* Shutdown the Seeq. */
561 reset_hpc3_and_seeq(sp->hregs, sregs);
563 seeq_purge_ring(dev);
568 static inline int sgiseeq_reset(struct net_device *dev)
570 struct sgiseeq_private *sp = netdev_priv(dev);
571 struct sgiseeq_regs *sregs = sp->sregs;
574 err = init_seeq(dev, sp, sregs);
578 dev->trans_start = jiffies;
579 netif_wake_queue(dev);
584 static int sgiseeq_start_xmit(struct sk_buff *skb, struct net_device *dev)
586 struct sgiseeq_private *sp = netdev_priv(dev);
587 struct hpc3_ethregs *hregs = sp->hregs;
589 struct sgiseeq_tx_desc *td;
592 spin_lock_irqsave(&sp->tx_lock, flags);
596 if (len < ETH_ZLEN) {
597 if (skb_padto(skb, ETH_ZLEN))
602 dev->stats.tx_bytes += len;
604 td = &sp->tx_desc[entry];
605 dma_sync_desc_cpu(dev, td);
607 /* Create entry. There are so many races with adding a new
608 * descriptor to the chain:
609 * 1) Assume that the HPC is off processing a DMA chain while
610 * we are changing all of the following.
611 * 2) Do no allow the HPC to look at a new descriptor until
612 * we have completely set up it's state. This means, do
613 * not clear HPCDMA_EOX in the current last descritptor
614 * until the one we are adding looks consistent and could
615 * be processes right now.
616 * 3) The tx interrupt code must notice when we've added a new
617 * entry and the HPC got to the end of the chain before we
618 * added this new entry and restarted it.
621 td->tdma.pbuf = dma_map_single(dev->dev.parent, skb->data,
623 td->tdma.cntinfo = (len & HPCDMA_BCNT) |
624 HPCDMA_XIU | HPCDMA_EOXP | HPCDMA_XIE | HPCDMA_EOX;
625 dma_sync_desc_dev(dev, td);
626 if (sp->tx_old != sp->tx_new) {
627 struct sgiseeq_tx_desc *backend;
629 backend = &sp->tx_desc[PREV_TX(sp->tx_new)];
630 dma_sync_desc_cpu(dev, backend);
631 backend->tdma.cntinfo &= ~HPCDMA_EOX;
632 dma_sync_desc_dev(dev, backend);
634 sp->tx_new = NEXT_TX(sp->tx_new); /* Advance. */
636 /* Maybe kick the HPC back into motion. */
637 if (!(hregs->tx_ctrl & HPC3_ETXCTRL_ACTIVE))
638 kick_tx(dev, sp, hregs);
640 dev->trans_start = jiffies;
642 if (!TX_BUFFS_AVAIL(sp))
643 netif_stop_queue(dev);
644 spin_unlock_irqrestore(&sp->tx_lock, flags);
649 static void timeout(struct net_device *dev)
651 printk(KERN_NOTICE "%s: transmit timed out, resetting\n", dev->name);
654 dev->trans_start = jiffies;
655 netif_wake_queue(dev);
658 static void sgiseeq_set_multicast(struct net_device *dev)
660 struct sgiseeq_private *sp = (struct sgiseeq_private *) dev->priv;
661 unsigned char oldmode = sp->mode;
663 if(dev->flags & IFF_PROMISC)
664 sp->mode = SEEQ_RCMD_RANY;
665 else if ((dev->flags & IFF_ALLMULTI) || dev->mc_count)
666 sp->mode = SEEQ_RCMD_RBMCAST;
668 sp->mode = SEEQ_RCMD_RBCAST;
670 /* XXX I know this sucks, but is there a better way to reprogram
671 * XXX the receiver? At least, this shouldn't happen too often.
674 if (oldmode != sp->mode)
678 static inline void setup_tx_ring(struct net_device *dev,
679 struct sgiseeq_tx_desc *buf,
682 struct sgiseeq_private *sp = netdev_priv(dev);
685 while (i < (nbufs - 1)) {
686 buf[i].tdma.pnext = VIRT_TO_DMA(sp, buf + i + 1);
687 buf[i].tdma.pbuf = 0;
688 dma_sync_desc_dev(dev, &buf[i]);
691 buf[i].tdma.pnext = VIRT_TO_DMA(sp, buf);
692 dma_sync_desc_dev(dev, &buf[i]);
695 static inline void setup_rx_ring(struct net_device *dev,
696 struct sgiseeq_rx_desc *buf,
699 struct sgiseeq_private *sp = netdev_priv(dev);
702 while (i < (nbufs - 1)) {
703 buf[i].rdma.pnext = VIRT_TO_DMA(sp, buf + i + 1);
704 buf[i].rdma.pbuf = 0;
705 dma_sync_desc_dev(dev, &buf[i]);
708 buf[i].rdma.pbuf = 0;
709 buf[i].rdma.pnext = VIRT_TO_DMA(sp, buf);
710 dma_sync_desc_dev(dev, &buf[i]);
713 static int __init sgiseeq_probe(struct platform_device *pdev)
715 struct sgiseeq_platform_data *pd = pdev->dev.platform_data;
716 struct hpc3_regs *hpcregs = pd->hpc;
717 struct sgiseeq_init_block *sr;
718 unsigned int irq = pd->irq;
719 struct sgiseeq_private *sp;
720 struct net_device *dev;
722 DECLARE_MAC_BUF(mac);
724 dev = alloc_etherdev(sizeof (struct sgiseeq_private));
726 printk(KERN_ERR "Sgiseeq: Etherdev alloc failed, aborting.\n");
731 platform_set_drvdata(pdev, dev);
732 sp = netdev_priv(dev);
734 /* Make private data page aligned */
735 sr = dma_alloc_noncoherent(&pdev->dev, sizeof(*sp->srings),
736 &sp->srings_dma, GFP_KERNEL);
738 printk(KERN_ERR "Sgiseeq: Page alloc failed, aborting.\n");
740 goto err_out_free_dev;
743 sp->rx_desc = sp->srings->rxvector;
744 sp->tx_desc = sp->srings->txvector;
746 /* A couple calculations now, saves many cycles later. */
747 setup_rx_ring(dev, sp->rx_desc, SEEQ_RX_BUFFERS);
748 setup_tx_ring(dev, sp->tx_desc, SEEQ_TX_BUFFERS);
750 memcpy(dev->dev_addr, pd->mac, ETH_ALEN);
756 sp->sregs = (struct sgiseeq_regs *) &hpcregs->eth_ext[0];
757 sp->hregs = &hpcregs->ethregs;
758 sp->name = sgiseeqstr;
759 sp->mode = SEEQ_RCMD_RBCAST;
761 /* Setup PIO and DMA transfer timing */
762 sp->hregs->pconfig = 0x161;
763 sp->hregs->dconfig = HPC3_EDCFG_FIRQ | HPC3_EDCFG_FEOP |
764 HPC3_EDCFG_FRXDC | HPC3_EDCFG_PTO | 0x026;
766 /* Setup PIO and DMA transfer timing */
767 sp->hregs->pconfig = 0x161;
768 sp->hregs->dconfig = HPC3_EDCFG_FIRQ | HPC3_EDCFG_FEOP |
769 HPC3_EDCFG_FRXDC | HPC3_EDCFG_PTO | 0x026;
771 /* Reset the chip. */
772 hpc3_eth_reset(sp->hregs);
774 sp->is_edlc = !(sp->sregs->rw.rregs.collision_tx[0] & 0xff);
776 sp->control = SEEQ_CTRL_XCNT | SEEQ_CTRL_ACCNT |
777 SEEQ_CTRL_SFLAG | SEEQ_CTRL_ESHORT |
780 dev->open = sgiseeq_open;
781 dev->stop = sgiseeq_close;
782 dev->hard_start_xmit = sgiseeq_start_xmit;
783 dev->tx_timeout = timeout;
784 dev->watchdog_timeo = (200 * HZ) / 1000;
785 dev->set_multicast_list = sgiseeq_set_multicast;
786 dev->set_mac_address = sgiseeq_set_mac_address;
789 if (register_netdev(dev)) {
790 printk(KERN_ERR "Sgiseeq: Cannot register net device, "
793 goto err_out_free_page;
796 printk(KERN_INFO "%s: %s %s\n",
797 dev->name, sgiseeqstr, print_mac(mac, dev->dev_addr));
802 free_page((unsigned long) sp->srings);
810 static int __exit sgiseeq_remove(struct platform_device *pdev)
812 struct net_device *dev = platform_get_drvdata(pdev);
813 struct sgiseeq_private *sp = netdev_priv(dev);
815 unregister_netdev(dev);
816 dma_free_noncoherent(&pdev->dev, sizeof(*sp->srings), sp->srings,
819 platform_set_drvdata(pdev, NULL);
824 static struct platform_driver sgiseeq_driver = {
825 .probe = sgiseeq_probe,
826 .remove = __devexit_p(sgiseeq_remove),
832 static int __init sgiseeq_module_init(void)
834 if (platform_driver_register(&sgiseeq_driver)) {
835 printk(KERN_ERR "Driver registration failed\n");
842 static void __exit sgiseeq_module_exit(void)
844 platform_driver_unregister(&sgiseeq_driver);
847 module_init(sgiseeq_module_init);
848 module_exit(sgiseeq_module_exit);
850 MODULE_DESCRIPTION("SGI Seeq 8003 driver");
851 MODULE_AUTHOR("Linux/MIPS Mailing List <linux-mips@linux-mips.org>");
852 MODULE_LICENSE("GPL");