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pasemi_mac: don't enable rx before there are buffers on the ring
[linux-2.6.git] / drivers / net / pasemi_mac.c
blob643fce860e5c802917fb139dbbc6c1ca767dca4e
1 /*
2 * Copyright (C) 2006-2007 PA Semi, Inc
3 *
4 * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/pci.h>
23 #include <linux/interrupt.h>
24 #include <linux/dmaengine.h>
25 #include <linux/delay.h>
26 #include <linux/netdevice.h>
27 #include <linux/etherdevice.h>
28 #include <asm/dma-mapping.h>
29 #include <linux/in.h>
30 #include <linux/skbuff.h>
31
32 #include <linux/ip.h>
33 #include <linux/tcp.h>
34 #include <net/checksum.h>
35
36 #include <asm/irq.h>
37
38 #include "pasemi_mac.h"
39
40
41 /* TODO list
42 *
43 * - Get rid of pci_{read,write}_config(), map registers with ioremap
44 * for performance
45 * - PHY support
46 * - Multicast support
47 * - Large MTU support
48 * - Other performance improvements
49 */
50
51
52 /* Must be a power of two */
53 #define RX_RING_SIZE 512
54 #define TX_RING_SIZE 512
55
56 #define DEFAULT_MSG_ENABLE \
57 (NETIF_MSG_DRV | \
58 NETIF_MSG_PROBE | \
59 NETIF_MSG_LINK | \
60 NETIF_MSG_TIMER | \
61 NETIF_MSG_IFDOWN | \
62 NETIF_MSG_IFUP | \
63 NETIF_MSG_RX_ERR | \
64 NETIF_MSG_TX_ERR)
65
66 #define TX_DESC(mac, num) ((mac)->tx->desc[(num) & (TX_RING_SIZE-1)])
67 #define TX_DESC_INFO(mac, num) ((mac)->tx->desc_info[(num) & (TX_RING_SIZE-1)])
68 #define RX_DESC(mac, num) ((mac)->rx->desc[(num) & (RX_RING_SIZE-1)])
69 #define RX_DESC_INFO(mac, num) ((mac)->rx->desc_info[(num) & (RX_RING_SIZE-1)])
70 #define RX_BUFF(mac, num) ((mac)->rx->buffers[(num) & (RX_RING_SIZE-1)])
71
72 #define RING_USED(ring) (((ring)->next_to_fill - (ring)->next_to_clean) \
73 & ((ring)->size - 1))
74 #define RING_AVAIL(ring) ((ring->size) - RING_USED(ring))
75
76 #define BUF_SIZE 1646 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
77
78 MODULE_LICENSE("GPL");
79 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
80 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
81
82 static int debug = -1; /* -1 == use DEFAULT_MSG_ENABLE as value */
83 module_param(debug, int, 0);
84 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
85
86 static struct pasdma_status *dma_status;
87
88 static void write_iob_reg(struct pasemi_mac *mac, unsigned int reg,
89 unsigned int val)
90 {
91 out_le32(mac->iob_regs+reg, val);
92 }
93
94 static unsigned int read_mac_reg(struct pasemi_mac *mac, unsigned int reg)
95 {
96 return in_le32(mac->regs+reg);
97 }
98
99 static void write_mac_reg(struct pasemi_mac *mac, unsigned int reg,
100 unsigned int val)
101 {
102 out_le32(mac->regs+reg, val);
103 }
104
105 static unsigned int read_dma_reg(struct pasemi_mac *mac, unsigned int reg)
106 {
107 return in_le32(mac->dma_regs+reg);
108 }
109
110 static void write_dma_reg(struct pasemi_mac *mac, unsigned int reg,
111 unsigned int val)
112 {
113 out_le32(mac->dma_regs+reg, val);
114 }
115
116 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
117 {
118 struct pci_dev *pdev = mac->pdev;
119 struct device_node *dn = pci_device_to_OF_node(pdev);
120 int len;
121 const u8 *maddr;
122 u8 addr[6];
123
124 if (!dn) {
125 dev_dbg(&pdev->dev,
126 "No device node for mac, not configuring\n");
127 return -ENOENT;
128 }
129
130 maddr = of_get_property(dn, "local-mac-address", &len);
131
132 if (maddr && len == 6) {
133 memcpy(mac->mac_addr, maddr, 6);
134 return 0;
135 }
136
137 /* Some old versions of firmware mistakenly uses mac-address
138 * (and as a string) instead of a byte array in local-mac-address.
139 */
140
141 if (maddr == NULL)
142 maddr = of_get_property(dn, "mac-address", NULL);
143
144 if (maddr == NULL) {
145 dev_warn(&pdev->dev,
146 "no mac address in device tree, not configuring\n");
147 return -ENOENT;
148 }
149
150
151 if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
152 &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
153 dev_warn(&pdev->dev,
154 "can't parse mac address, not configuring\n");
155 return -EINVAL;
156 }
157
158 memcpy(mac->mac_addr, addr, 6);
159
160 return 0;
161 }
162
163 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
164 {
165 struct pasemi_mac_rxring *ring;
166 struct pasemi_mac *mac = netdev_priv(dev);
167 int chan_id = mac->dma_rxch;
168
169 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
170
171 if (!ring)
172 goto out_ring;
173
174 spin_lock_init(&ring->lock);
175
176 ring->size = RX_RING_SIZE;
177 ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
178 RX_RING_SIZE, GFP_KERNEL);
179
180 if (!ring->desc_info)
181 goto out_desc_info;
182
183 /* Allocate descriptors */
184 ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
185 RX_RING_SIZE *
186 sizeof(struct pas_dma_xct_descr),
187 &ring->dma, GFP_KERNEL);
188
189 if (!ring->desc)
190 goto out_desc;
191
192 memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
193
194 ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
195 RX_RING_SIZE * sizeof(u64),
196 &ring->buf_dma, GFP_KERNEL);
197 if (!ring->buffers)
198 goto out_buffers;
199
200 memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
201
202 write_dma_reg(mac, PAS_DMA_RXCHAN_BASEL(chan_id), PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
203
204 write_dma_reg(mac, PAS_DMA_RXCHAN_BASEU(chan_id),
205 PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
206 PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
207
208 write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id),
209 PAS_DMA_RXCHAN_CFG_HBU(2));
210
211 write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if),
212 PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
213
214 write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if),
215 PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
216 PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
217
218 write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if),
219 PAS_DMA_RXINT_CFG_DHL(2));
220
221 ring->next_to_fill = 0;
222 ring->next_to_clean = 0;
223
224 snprintf(ring->irq_name, sizeof(ring->irq_name),
225 "%s rx", dev->name);
226 mac->rx = ring;
227
228 return 0;
229
230 out_buffers:
231 dma_free_coherent(&mac->dma_pdev->dev,
232 RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
233 mac->rx->desc, mac->rx->dma);
234 out_desc:
235 kfree(ring->desc_info);
236 out_desc_info:
237 kfree(ring);
238 out_ring:
239 return -ENOMEM;
240 }
241
242
243 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
244 {
245 struct pasemi_mac *mac = netdev_priv(dev);
246 u32 val;
247 int chan_id = mac->dma_txch;
248 struct pasemi_mac_txring *ring;
249
250 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
251 if (!ring)
252 goto out_ring;
253
254 spin_lock_init(&ring->lock);
255
256 ring->size = TX_RING_SIZE;
257 ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
258 TX_RING_SIZE, GFP_KERNEL);
259 if (!ring->desc_info)
260 goto out_desc_info;
261
262 /* Allocate descriptors */
263 ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
264 TX_RING_SIZE *
265 sizeof(struct pas_dma_xct_descr),
266 &ring->dma, GFP_KERNEL);
267 if (!ring->desc)
268 goto out_desc;
269
270 memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
271
272 write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(chan_id),
273 PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
274 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
275 val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
276
277 write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val);
278
279 write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id),
280 PAS_DMA_TXCHAN_CFG_TY_IFACE |
281 PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
282 PAS_DMA_TXCHAN_CFG_UP |
283 PAS_DMA_TXCHAN_CFG_WT(2));
284
285 ring->next_to_fill = 0;
286 ring->next_to_clean = 0;
287
288 snprintf(ring->irq_name, sizeof(ring->irq_name),
289 "%s tx", dev->name);
290 mac->tx = ring;
291
292 return 0;
293
294 out_desc:
295 kfree(ring->desc_info);
296 out_desc_info:
297 kfree(ring);
298 out_ring:
299 return -ENOMEM;
300 }
301
302 static void pasemi_mac_free_tx_resources(struct net_device *dev)
303 {
304 struct pasemi_mac *mac = netdev_priv(dev);
305 unsigned int i;
306 struct pasemi_mac_buffer *info;
307 struct pas_dma_xct_descr *dp;
308
309 for (i = 0; i < TX_RING_SIZE; i++) {
310 info = &TX_DESC_INFO(mac, i);
311 dp = &TX_DESC(mac, i);
312 if (info->dma) {
313 if (info->skb) {
314 pci_unmap_single(mac->dma_pdev,
315 info->dma,
316 info->skb->len,
317 PCI_DMA_TODEVICE);
318 dev_kfree_skb_any(info->skb);
319 }
320 info->dma = 0;
321 info->skb = NULL;
322 dp->mactx = 0;
323 dp->ptr = 0;
324 }
325 }
326
327 dma_free_coherent(&mac->dma_pdev->dev,
328 TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
329 mac->tx->desc, mac->tx->dma);
330
331 kfree(mac->tx->desc_info);
332 kfree(mac->tx);
333 mac->tx = NULL;
334 }
335
336 static void pasemi_mac_free_rx_resources(struct net_device *dev)
337 {
338 struct pasemi_mac *mac = netdev_priv(dev);
339 unsigned int i;
340 struct pasemi_mac_buffer *info;
341 struct pas_dma_xct_descr *dp;
342
343 for (i = 0; i < RX_RING_SIZE; i++) {
344 info = &RX_DESC_INFO(mac, i);
345 dp = &RX_DESC(mac, i);
346 if (info->skb) {
347 if (info->dma) {
348 pci_unmap_single(mac->dma_pdev,
349 info->dma,
350 info->skb->len,
351 PCI_DMA_FROMDEVICE);
352 dev_kfree_skb_any(info->skb);
353 }
354 info->dma = 0;
355 info->skb = NULL;
356 dp->macrx = 0;
357 dp->ptr = 0;
358 }
359 }
360
361 dma_free_coherent(&mac->dma_pdev->dev,
362 RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
363 mac->rx->desc, mac->rx->dma);
364
365 dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
366 mac->rx->buffers, mac->rx->buf_dma);
367
368 kfree(mac->rx->desc_info);
369 kfree(mac->rx);
370 mac->rx = NULL;
371 }
372
373 static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
374 {
375 struct pasemi_mac *mac = netdev_priv(dev);
376 unsigned int i;
377 int start = mac->rx->next_to_fill;
378 unsigned int limit, count;
379
380 limit = RING_AVAIL(mac->rx);
381 /* Check to see if we're doing first-time setup */
382 if (unlikely(mac->rx->next_to_clean == 0 && mac->rx->next_to_fill == 0))
383 limit = RX_RING_SIZE;
384
385 if (limit <= 0)
386 return;
387
388 i = start;
389 for (count = limit; count; count--) {
390 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
391 u64 *buff = &RX_BUFF(mac, i);
392 struct sk_buff *skb;
393 dma_addr_t dma;
394
395 /* skb might still be in there for recycle on short receives */
396 if (info->skb)
397 skb = info->skb;
398 else
399 skb = dev_alloc_skb(BUF_SIZE);
400
401 if (unlikely(!skb))
402 break;
403
404 dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
405 PCI_DMA_FROMDEVICE);
406
407 if (unlikely(dma_mapping_error(dma))) {
408 dev_kfree_skb_irq(info->skb);
409 break;
410 }
411
412 info->skb = skb;
413 info->dma = dma;
414 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
415 i++;
416 }
417
418 wmb();
419
420 write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), limit - count);
421 write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), limit - count);
422
423 mac->rx->next_to_fill += limit - count;
424 }
425
426 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
427 {
428 unsigned int reg, pcnt;
429 /* Re-enable packet count interrupts: finally
430 * ack the packet count interrupt we got in rx_intr.
431 */
432
433 pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
434
435 reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
436
437 write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
438 }
439
440 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
441 {
442 unsigned int reg, pcnt;
443
444 /* Re-enable packet count interrupts */
445 pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
446
447 reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
448
449 write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
450 }
451
452
453 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
454 {
455 unsigned int n;
456 int count;
457 struct pas_dma_xct_descr *dp;
458 struct pasemi_mac_buffer *info;
459 struct sk_buff *skb;
460 unsigned int i, len;
461 u64 macrx;
462 dma_addr_t dma;
463
464 spin_lock(&mac->rx->lock);
465
466 n = mac->rx->next_to_clean;
467
468 for (count = limit; count; count--) {
469
470 rmb();
471
472 dp = &RX_DESC(mac, n);
473 prefetchw(dp);
474 macrx = dp->macrx;
475
476 if (!(macrx & XCT_MACRX_O))
477 break;
478
479
480 info = NULL;
481
482 /* We have to scan for our skb since there's no way
483 * to back-map them from the descriptor, and if we
484 * have several receive channels then they might not
485 * show up in the same order as they were put on the
486 * interface ring.
487 */
488
489 dma = (dp->ptr & XCT_PTR_ADDR_M);
490 for (i = n; i < (n + RX_RING_SIZE); i++) {
491 info = &RX_DESC_INFO(mac, i);
492 if (info->dma == dma)
493 break;
494 }
495 prefetchw(info);
496
497 skb = info->skb;
498 prefetchw(skb);
499 info->dma = 0;
500
501 pci_unmap_single(mac->dma_pdev, dma, skb->len,
502 PCI_DMA_FROMDEVICE);
503
504 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
505
506 if (len < 256) {
507 struct sk_buff *new_skb =
508 netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
509 if (new_skb) {
510 skb_reserve(new_skb, NET_IP_ALIGN);
511 memcpy(new_skb->data, skb->data, len);
512 /* save the skb in buffer_info as good */
513 skb = new_skb;
514 }
515 /* else just continue with the old one */
516 } else
517 info->skb = NULL;
518
519 skb_put(skb, len);
520
521 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
522 skb->ip_summed = CHECKSUM_UNNECESSARY;
523 skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
524 XCT_MACRX_CSUM_S;
525 } else
526 skb->ip_summed = CHECKSUM_NONE;
527
528 mac->netdev->stats.rx_bytes += len;
529 mac->netdev->stats.rx_packets++;
530
531 skb->protocol = eth_type_trans(skb, mac->netdev);
532 netif_receive_skb(skb);
533
534 dp->ptr = 0;
535 dp->macrx = 0;
536
537 n++;
538 }
539
540 mac->rx->next_to_clean += limit - count;
541 pasemi_mac_replenish_rx_ring(mac->netdev);
542
543 spin_unlock(&mac->rx->lock);
544
545 return count;
546 }
547
548 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
549 {
550 int i;
551 struct pasemi_mac_buffer *info;
552 struct pas_dma_xct_descr *dp;
553 unsigned int start, count, limit;
554 unsigned int total_count;
555 unsigned long flags;
556 struct sk_buff *skbs[32];
557 dma_addr_t dmas[32];
558
559 total_count = 0;
560 restart:
561 spin_lock_irqsave(&mac->tx->lock, flags);
562
563 start = mac->tx->next_to_clean;
564 limit = min(mac->tx->next_to_fill, start+32);
565
566 count = 0;
567
568 for (i = start; i < limit; i++) {
569 dp = &TX_DESC(mac, i);
570
571 if (unlikely(dp->mactx & XCT_MACTX_O))
572 /* Not yet transmitted */
573 break;
574
575 info = &TX_DESC_INFO(mac, i);
576 skbs[count] = info->skb;
577 dmas[count] = info->dma;
578
579 info->skb = NULL;
580 info->dma = 0;
581 dp->mactx = 0;
582 dp->ptr = 0;
583
584 count++;
585 }
586 mac->tx->next_to_clean += count;
587 spin_unlock_irqrestore(&mac->tx->lock, flags);
588 netif_wake_queue(mac->netdev);
589
590 for (i = 0; i < count; i++) {
591 pci_unmap_single(mac->dma_pdev, dmas[i],
592 skbs[i]->len, PCI_DMA_TODEVICE);
593 dev_kfree_skb_irq(skbs[i]);
594 }
595
596 total_count += count;
597
598 /* If the batch was full, try to clean more */
599 if (count == 32)
600 goto restart;
601
602 return total_count;
603 }
604
605
606 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
607 {
608 struct net_device *dev = data;
609 struct pasemi_mac *mac = netdev_priv(dev);
610 unsigned int reg;
611
612 if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
613 return IRQ_NONE;
614
615 if (*mac->rx_status & PAS_STATUS_ERROR)
616 printk("rx_status reported error\n");
617
618 /* Don't reset packet count so it won't fire again but clear
619 * all others.
620 */
621
622 reg = 0;
623 if (*mac->rx_status & PAS_STATUS_SOFT)
624 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
625 if (*mac->rx_status & PAS_STATUS_ERROR)
626 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
627 if (*mac->rx_status & PAS_STATUS_TIMER)
628 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
629
630 netif_rx_schedule(dev, &mac->napi);
631
632 write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
633
634 return IRQ_HANDLED;
635 }
636
637 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
638 {
639 struct net_device *dev = data;
640 struct pasemi_mac *mac = netdev_priv(dev);
641 unsigned int reg, pcnt;
642
643 if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
644 return IRQ_NONE;
645
646 pasemi_mac_clean_tx(mac);
647
648 pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
649
650 reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
651
652 if (*mac->tx_status & PAS_STATUS_SOFT)
653 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
654 if (*mac->tx_status & PAS_STATUS_ERROR)
655 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
656
657 write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
658
659 return IRQ_HANDLED;
660 }
661
662 static void pasemi_adjust_link(struct net_device *dev)
663 {
664 struct pasemi_mac *mac = netdev_priv(dev);
665 int msg;
666 unsigned int flags;
667 unsigned int new_flags;
668
669 if (!mac->phydev->link) {
670 /* If no link, MAC speed settings don't matter. Just report
671 * link down and return.
672 */
673 if (mac->link && netif_msg_link(mac))
674 printk(KERN_INFO "%s: Link is down.\n", dev->name);
675
676 netif_carrier_off(dev);
677 mac->link = 0;
678
679 return;
680 } else
681 netif_carrier_on(dev);
682
683 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
684 new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
685 PAS_MAC_CFG_PCFG_TSR_M);
686
687 if (!mac->phydev->duplex)
688 new_flags |= PAS_MAC_CFG_PCFG_HD;
689
690 switch (mac->phydev->speed) {
691 case 1000:
692 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
693 PAS_MAC_CFG_PCFG_TSR_1G;
694 break;
695 case 100:
696 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
697 PAS_MAC_CFG_PCFG_TSR_100M;
698 break;
699 case 10:
700 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
701 PAS_MAC_CFG_PCFG_TSR_10M;
702 break;
703 default:
704 printk("Unsupported speed %d\n", mac->phydev->speed);
705 }
706
707 /* Print on link or speed/duplex change */
708 msg = mac->link != mac->phydev->link || flags != new_flags;
709
710 mac->duplex = mac->phydev->duplex;
711 mac->speed = mac->phydev->speed;
712 mac->link = mac->phydev->link;
713
714 if (new_flags != flags)
715 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
716
717 if (msg && netif_msg_link(mac))
718 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
719 dev->name, mac->speed, mac->duplex ? "full" : "half");
720 }
721
722 static int pasemi_mac_phy_init(struct net_device *dev)
723 {
724 struct pasemi_mac *mac = netdev_priv(dev);
725 struct device_node *dn, *phy_dn;
726 struct phy_device *phydev;
727 unsigned int phy_id;
728 const phandle *ph;
729 const unsigned int *prop;
730 struct resource r;
731 int ret;
732
733 dn = pci_device_to_OF_node(mac->pdev);
734 ph = of_get_property(dn, "phy-handle", NULL);
735 if (!ph)
736 return -ENODEV;
737 phy_dn = of_find_node_by_phandle(*ph);
738
739 prop = of_get_property(phy_dn, "reg", NULL);
740 ret = of_address_to_resource(phy_dn->parent, 0, &r);
741 if (ret)
742 goto err;
743
744 phy_id = *prop;
745 snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
746
747 of_node_put(phy_dn);
748
749 mac->link = 0;
750 mac->speed = 0;
751 mac->duplex = -1;
752
753 phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
754
755 if (IS_ERR(phydev)) {
756 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
757 return PTR_ERR(phydev);
758 }
759
760 mac->phydev = phydev;
761
762 return 0;
763
764 err:
765 of_node_put(phy_dn);
766 return -ENODEV;
767 }
768
769
770 static int pasemi_mac_open(struct net_device *dev)
771 {
772 struct pasemi_mac *mac = netdev_priv(dev);
773 int base_irq;
774 unsigned int flags;
775 int ret;
776
777 /* enable rx section */
778 write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
779
780 /* enable tx section */
781 write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
782
783 flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
784 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
785 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
786
787 write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
788
789 write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
790 PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
791
792 write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
793 PAS_IOB_DMA_TXCH_CFG_CNTTH(128));
794
795 /* Clear out any residual packet count state from firmware */
796 pasemi_mac_restart_rx_intr(mac);
797 pasemi_mac_restart_tx_intr(mac);
798
799 /* 0xffffff is max value, about 16ms */
800 write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
801 PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
802
803 ret = pasemi_mac_setup_rx_resources(dev);
804 if (ret)
805 goto out_rx_resources;
806
807 ret = pasemi_mac_setup_tx_resources(dev);
808 if (ret)
809 goto out_tx_resources;
810
811 write_mac_reg(mac, PAS_MAC_IPC_CHNL,
812 PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
813 PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
814
815 /* enable rx if */
816 write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
817 PAS_DMA_RXINT_RCMDSTA_EN);
818
819 /* enable rx channel */
820 write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
821 PAS_DMA_RXCHAN_CCMDSTA_EN |
822 PAS_DMA_RXCHAN_CCMDSTA_DU);
823
824 /* enable tx channel */
825 write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
826 PAS_DMA_TXCHAN_TCMDSTA_EN);
827
828 pasemi_mac_replenish_rx_ring(dev);
829
830 flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
831 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
832
833 if (mac->type == MAC_TYPE_GMAC)
834 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
835 else
836 flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
837
838 /* Enable interface in MAC */
839 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
840
841 ret = pasemi_mac_phy_init(dev);
842 /* Some configs don't have PHYs (XAUI etc), so don't complain about
843 * failed init due to -ENODEV.
844 */
845 if (ret && ret != -ENODEV)
846 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
847
848 netif_start_queue(dev);
849 napi_enable(&mac->napi);
850
851 /* Interrupts are a bit different for our DMA controller: While
852 * it's got one a regular PCI device header, the interrupt there
853 * is really the base of the range it's using. Each tx and rx
854 * channel has it's own interrupt source.
855 */
856
857 base_irq = virq_to_hw(mac->dma_pdev->irq);
858
859 mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
860 mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
861
862 ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
863 mac->tx->irq_name, dev);
864 if (ret) {
865 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
866 base_irq + mac->dma_txch, ret);
867 goto out_tx_int;
868 }
869
870 ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
871 mac->rx->irq_name, dev);
872 if (ret) {
873 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
874 base_irq + 20 + mac->dma_rxch, ret);
875 goto out_rx_int;
876 }
877
878 if (mac->phydev)
879 phy_start(mac->phydev);
880
881 return 0;
882
883 out_rx_int:
884 free_irq(mac->tx_irq, dev);
885 out_tx_int:
886 napi_disable(&mac->napi);
887 netif_stop_queue(dev);
888 pasemi_mac_free_tx_resources(dev);
889 out_tx_resources:
890 pasemi_mac_free_rx_resources(dev);
891 out_rx_resources:
892
893 return ret;
894 }
895
896 #define MAX_RETRIES 5000
897
898 static int pasemi_mac_close(struct net_device *dev)
899 {
900 struct pasemi_mac *mac = netdev_priv(dev);
901 unsigned int stat;
902 int retries;
903
904 if (mac->phydev) {
905 phy_stop(mac->phydev);
906 phy_disconnect(mac->phydev);
907 }
908
909 netif_stop_queue(dev);
910 napi_disable(&mac->napi);
911
912 /* Clean out any pending buffers */
913 pasemi_mac_clean_tx(mac);
914 pasemi_mac_clean_rx(mac, RX_RING_SIZE);
915
916 /* Disable interface */
917 write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), PAS_DMA_TXCHAN_TCMDSTA_ST);
918 write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST);
919 write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), PAS_DMA_RXCHAN_CCMDSTA_ST);
920
921 for (retries = 0; retries < MAX_RETRIES; retries++) {
922 stat = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
923 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
924 break;
925 cond_resched();
926 }
927
928 if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
929 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
930
931 for (retries = 0; retries < MAX_RETRIES; retries++) {
932 stat = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
933 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
934 break;
935 cond_resched();
936 }
937
938 if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
939 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
940
941 for (retries = 0; retries < MAX_RETRIES; retries++) {
942 stat = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
943 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
944 break;
945 cond_resched();
946 }
947
948 if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
949 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
950
951 /* Then, disable the channel. This must be done separately from
952 * stopping, since you can't disable when active.
953 */
954
955 write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
956 write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
957 write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
958
959 free_irq(mac->tx_irq, dev);
960 free_irq(mac->rx_irq, dev);
961
962 /* Free resources */
963 pasemi_mac_free_rx_resources(dev);
964 pasemi_mac_free_tx_resources(dev);
965
966 return 0;
967 }
968
969 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
970 {
971 struct pasemi_mac *mac = netdev_priv(dev);
972 struct pasemi_mac_txring *txring;
973 struct pasemi_mac_buffer *info;
974 struct pas_dma_xct_descr *dp;
975 u64 dflags, mactx, ptr;
976 dma_addr_t map;
977 unsigned long flags;
978
979 dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
980
981 if (skb->ip_summed == CHECKSUM_PARTIAL) {
982 const unsigned char *nh = skb_network_header(skb);
983
984 switch (ip_hdr(skb)->protocol) {
985 case IPPROTO_TCP:
986 dflags |= XCT_MACTX_CSUM_TCP;
987 dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
988 dflags |= XCT_MACTX_IPO(nh - skb->data);
989 break;
990 case IPPROTO_UDP:
991 dflags |= XCT_MACTX_CSUM_UDP;
992 dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
993 dflags |= XCT_MACTX_IPO(nh - skb->data);
994 break;
995 }
996 }
997
998 map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
999
1000 if (dma_mapping_error(map))
1001 return NETDEV_TX_BUSY;
1002
1003 mactx = dflags | XCT_MACTX_LLEN(skb->len);
1004 ptr = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1005
1006 txring = mac->tx;
1007
1008 spin_lock_irqsave(&txring->lock, flags);
1009
1010 if (RING_AVAIL(txring) <= 1) {
1011 spin_unlock_irqrestore(&txring->lock, flags);
1012 pasemi_mac_clean_tx(mac);
1013 pasemi_mac_restart_tx_intr(mac);
1014 spin_lock_irqsave(&txring->lock, flags);
1015
1016 if (RING_AVAIL(txring) <= 1) {
1017 /* Still no room -- stop the queue and wait for tx
1018 * intr when there's room.
1019 */
1020 netif_stop_queue(dev);
1021 goto out_err;
1022 }
1023 }
1024
1025 dp = &TX_DESC(mac, txring->next_to_fill);
1026 info = &TX_DESC_INFO(mac, txring->next_to_fill);
1027
1028 dp->mactx = mactx;
1029 dp->ptr = ptr;
1030 info->dma = map;
1031 info->skb = skb;
1032
1033 txring->next_to_fill++;
1034 dev->stats.tx_packets++;
1035 dev->stats.tx_bytes += skb->len;
1036
1037 spin_unlock_irqrestore(&txring->lock, flags);
1038
1039 write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1040
1041 return NETDEV_TX_OK;
1042
1043 out_err:
1044 spin_unlock_irqrestore(&txring->lock, flags);
1045 pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1046 return NETDEV_TX_BUSY;
1047 }
1048
1049 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1050 {
1051 struct pasemi_mac *mac = netdev_priv(dev);
1052 unsigned int flags;
1053
1054 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1055
1056 /* Set promiscuous */
1057 if (dev->flags & IFF_PROMISC)
1058 flags |= PAS_MAC_CFG_PCFG_PR;
1059 else
1060 flags &= ~PAS_MAC_CFG_PCFG_PR;
1061
1062 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1063 }
1064
1065
1066 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1067 {
1068 struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1069 struct net_device *dev = mac->netdev;
1070 int pkts;
1071
1072 pasemi_mac_clean_tx(mac);
1073 pkts = pasemi_mac_clean_rx(mac, budget);
1074 if (pkts < budget) {
1075 /* all done, no more packets present */
1076 netif_rx_complete(dev, napi);
1077
1078 pasemi_mac_restart_rx_intr(mac);
1079 }
1080 return pkts;
1081 }
1082
1083 static void __iomem * __devinit map_onedev(struct pci_dev *p, int index)
1084 {
1085 struct device_node *dn;
1086 void __iomem *ret;
1087
1088 dn = pci_device_to_OF_node(p);
1089 if (!dn)
1090 goto fallback;
1091
1092 ret = of_iomap(dn, index);
1093 if (!ret)
1094 goto fallback;
1095
1096 return ret;
1097 fallback:
1098 /* This is hardcoded and ugly, but we have some firmware versions
1099 * that don't provide the register space in the device tree. Luckily
1100 * they are at well-known locations so we can just do the math here.
1101 */
1102 return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
1103 }
1104
1105 static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac)
1106 {
1107 struct resource res;
1108 struct device_node *dn;
1109 int err;
1110
1111 mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1112 if (!mac->dma_pdev) {
1113 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1114 return -ENODEV;
1115 }
1116
1117 mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1118 if (!mac->iob_pdev) {
1119 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1120 return -ENODEV;
1121 }
1122
1123 mac->regs = map_onedev(mac->pdev, 0);
1124 mac->dma_regs = map_onedev(mac->dma_pdev, 0);
1125 mac->iob_regs = map_onedev(mac->iob_pdev, 0);
1126
1127 if (!mac->regs || !mac->dma_regs || !mac->iob_regs) {
1128 dev_err(&mac->pdev->dev, "Can't map registers\n");
1129 return -ENODEV;
1130 }
1131
1132 /* The dma status structure is located in the I/O bridge, and
1133 * is cache coherent.
1134 */
1135 if (!dma_status) {
1136 dn = pci_device_to_OF_node(mac->iob_pdev);
1137 if (dn)
1138 err = of_address_to_resource(dn, 1, &res);
1139 if (!dn || err) {
1140 /* Fallback for old firmware */
1141 res.start = 0xfd800000;
1142 res.end = res.start + 0x1000;
1143 }
1144 dma_status = __ioremap(res.start, res.end-res.start, 0);
1145 }
1146
1147 return 0;
1148 }
1149
1150 static int __devinit
1151 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1152 {
1153 static int index = 0;
1154 struct net_device *dev;
1155 struct pasemi_mac *mac;
1156 int err;
1157 DECLARE_MAC_BUF(mac_buf);
1158
1159 err = pci_enable_device(pdev);
1160 if (err)
1161 return err;
1162
1163 dev = alloc_etherdev(sizeof(struct pasemi_mac));
1164 if (dev == NULL) {
1165 dev_err(&pdev->dev,
1166 "pasemi_mac: Could not allocate ethernet device.\n");
1167 err = -ENOMEM;
1168 goto out_disable_device;
1169 }
1170
1171 pci_set_drvdata(pdev, dev);
1172 SET_NETDEV_DEV(dev, &pdev->dev);
1173
1174 mac = netdev_priv(dev);
1175
1176 mac->pdev = pdev;
1177 mac->netdev = dev;
1178
1179 netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1180
1181 dev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
1182
1183 /* These should come out of the device tree eventually */
1184 mac->dma_txch = index;
1185 mac->dma_rxch = index;
1186
1187 /* We probe GMAC before XAUI, but the DMA interfaces are
1188 * in XAUI, GMAC order.
1189 */
1190 if (index < 4)
1191 mac->dma_if = index + 2;
1192 else
1193 mac->dma_if = index - 4;
1194 index++;
1195
1196 switch (pdev->device) {
1197 case 0xa005:
1198 mac->type = MAC_TYPE_GMAC;
1199 break;
1200 case 0xa006:
1201 mac->type = MAC_TYPE_XAUI;
1202 break;
1203 default:
1204 err = -ENODEV;
1205 goto out;
1206 }
1207
1208 /* get mac addr from device tree */
1209 if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1210 err = -ENODEV;
1211 goto out;
1212 }
1213 memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1214
1215 dev->open = pasemi_mac_open;
1216 dev->stop = pasemi_mac_close;
1217 dev->hard_start_xmit = pasemi_mac_start_tx;
1218 dev->set_multicast_list = pasemi_mac_set_rx_mode;
1219
1220 err = pasemi_mac_map_regs(mac);
1221 if (err)
1222 goto out;
1223
1224 mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1225 mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1226
1227 mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1228
1229 /* Enable most messages by default */
1230 mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1231
1232 err = register_netdev(dev);
1233
1234 if (err) {
1235 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1236 err);
1237 goto out;
1238 } else
1239 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1240 "hw addr %s\n",
1241 dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1242 mac->dma_if, mac->dma_txch, mac->dma_rxch,
1243 print_mac(mac_buf, dev->dev_addr));
1244
1245 return err;
1246
1247 out:
1248 if (mac->iob_pdev)
1249 pci_dev_put(mac->iob_pdev);
1250 if (mac->dma_pdev)
1251 pci_dev_put(mac->dma_pdev);
1252 if (mac->dma_regs)
1253 iounmap(mac->dma_regs);
1254 if (mac->iob_regs)
1255 iounmap(mac->iob_regs);
1256 if (mac->regs)
1257 iounmap(mac->regs);
1258
1259 free_netdev(dev);
1260 out_disable_device:
1261 pci_disable_device(pdev);
1262 return err;
1263
1264 }
1265
1266 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1267 {
1268 struct net_device *netdev = pci_get_drvdata(pdev);
1269 struct pasemi_mac *mac;
1270
1271 if (!netdev)
1272 return;
1273
1274 mac = netdev_priv(netdev);
1275
1276 unregister_netdev(netdev);
1277
1278 pci_disable_device(pdev);
1279 pci_dev_put(mac->dma_pdev);
1280 pci_dev_put(mac->iob_pdev);
1281
1282 iounmap(mac->regs);
1283 iounmap(mac->dma_regs);
1284 iounmap(mac->iob_regs);
1285
1286 pci_set_drvdata(pdev, NULL);
1287 free_netdev(netdev);
1288 }
1289
1290 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1291 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1292 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1293 { },
1294 };
1295
1296 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1297
1298 static struct pci_driver pasemi_mac_driver = {
1299 .name = "pasemi_mac",
1300 .id_table = pasemi_mac_pci_tbl,
1301 .probe = pasemi_mac_probe,
1302 .remove = __devexit_p(pasemi_mac_remove),
1303 };
1304
1305 static void __exit pasemi_mac_cleanup_module(void)
1306 {
1307 pci_unregister_driver(&pasemi_mac_driver);
1308 __iounmap(dma_status);
1309 dma_status = NULL;
1310 }
1311
1312 int pasemi_mac_init_module(void)
1313 {
1314 return pci_register_driver(&pasemi_mac_driver);
1315 }
1316
1317 module_init(pasemi_mac_init_module);
1318 module_exit(pasemi_mac_cleanup_module);
Linus' kernel tree