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12#include <linux/compiler.h>
13#include <linux/crc32.h>
14#include <linux/delay.h>
15#include <linux/etherdevice.h>
16#include <linux/ethtool.h>
17#include <linux/firmware.h>
18#include <linux/if_vlan.h>
19#include <linux/in.h>
20#include <linux/init.h>
21#include <linux/interrupt.h>
22#include <linux/gfp.h>
23#include <linux/ioport.h>
24#include <linux/ip.h>
25#include <linux/kernel.h>
26#include <linux/mii.h>
27#include <linux/module.h>
28#include <linux/netdevice.h>
29#include <linux/device.h>
30#include <linux/pci.h>
31#include <linux/skbuff.h>
32#include <linux/tcp.h>
33#include <linux/types.h>
34#include <linux/vmalloc.h>
35#include <linux/wait.h>
36#include <linux/workqueue.h>
37#include <linux/bitops.h>
38#include <net/checksum.h>
39
40#include "spider_net.h"
41
42MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
43 "<Jens.Osterkamp@de.ibm.com>");
44MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
45MODULE_LICENSE("GPL");
46MODULE_VERSION(VERSION);
47MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME);
48
49static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
50static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
51
52module_param(rx_descriptors, int, 0444);
53module_param(tx_descriptors, int, 0444);
54
55MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
56 "in rx chains");
57MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
58 "in tx chain");
59
60char spider_net_driver_name[] = "spidernet";
61
62static const struct pci_device_id spider_net_pci_tbl[] = {
63 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
64 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
65 { 0, }
66};
67
68MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
69
70
71
72
73
74
75
76
77static inline u32
78spider_net_read_reg(struct spider_net_card *card, u32 reg)
79{
80
81
82
83
84 return in_be32(card->regs + reg);
85}
86
87
88
89
90
91
92
93static inline void
94spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
95{
96
97
98
99
100 out_be32(card->regs + reg, value);
101}
102
103
104
105
106
107
108
109
110
111
112
113
114static void
115spider_net_write_phy(struct net_device *netdev, int mii_id,
116 int reg, int val)
117{
118 struct spider_net_card *card = netdev_priv(netdev);
119 u32 writevalue;
120
121 writevalue = ((u32)mii_id << 21) |
122 ((u32)reg << 16) | ((u32)val);
123
124 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
125}
126
127
128
129
130
131
132
133
134
135
136
137
138static int
139spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
140{
141 struct spider_net_card *card = netdev_priv(netdev);
142 u32 readvalue;
143
144 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
145 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
146
147
148
149
150
151 do {
152 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
153 } while (readvalue & SPIDER_NET_GPREXEC);
154
155 readvalue &= SPIDER_NET_GPRDAT_MASK;
156
157 return readvalue;
158}
159
160
161
162
163
164static void
165spider_net_setup_aneg(struct spider_net_card *card)
166{
167 struct mii_phy *phy = &card->phy;
168 u32 advertise = 0;
169 u16 bmsr, estat;
170
171 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
172 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
173
174 if (bmsr & BMSR_10HALF)
175 advertise |= ADVERTISED_10baseT_Half;
176 if (bmsr & BMSR_10FULL)
177 advertise |= ADVERTISED_10baseT_Full;
178 if (bmsr & BMSR_100HALF)
179 advertise |= ADVERTISED_100baseT_Half;
180 if (bmsr & BMSR_100FULL)
181 advertise |= ADVERTISED_100baseT_Full;
182
183 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
184 advertise |= SUPPORTED_1000baseT_Full;
185 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
186 advertise |= SUPPORTED_1000baseT_Half;
187
188 sungem_phy_probe(phy, phy->mii_id);
189 phy->def->ops->setup_aneg(phy, advertise);
190
191}
192
193
194
195
196
197
198
199static void
200spider_net_rx_irq_off(struct spider_net_card *card)
201{
202 u32 regvalue;
203
204 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
205 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
206}
207
208
209
210
211
212
213
214static void
215spider_net_rx_irq_on(struct spider_net_card *card)
216{
217 u32 regvalue;
218
219 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
220 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
221}
222
223
224
225
226
227
228
229
230static void
231spider_net_set_promisc(struct spider_net_card *card)
232{
233 u32 macu, macl;
234 struct net_device *netdev = card->netdev;
235
236 if (netdev->flags & IFF_PROMISC) {
237
238 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
239 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
240 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
241 SPIDER_NET_PROMISC_VALUE);
242 } else {
243 macu = netdev->dev_addr[0];
244 macu <<= 8;
245 macu |= netdev->dev_addr[1];
246 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
247
248 macu |= SPIDER_NET_UA_DESCR_VALUE;
249 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
250 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
251 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
252 SPIDER_NET_NONPROMISC_VALUE);
253 }
254}
255
256
257
258
259
260
261
262static inline int
263spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
264{
265 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
266}
267
268
269
270
271
272
273
274static void
275spider_net_free_chain(struct spider_net_card *card,
276 struct spider_net_descr_chain *chain)
277{
278 struct spider_net_descr *descr;
279
280 descr = chain->ring;
281 do {
282 descr->bus_addr = 0;
283 descr->hwdescr->next_descr_addr = 0;
284 descr = descr->next;
285 } while (descr != chain->ring);
286
287 dma_free_coherent(&card->pdev->dev, chain->num_desc * sizeof(struct spider_net_hw_descr),
288 chain->hwring, chain->dma_addr);
289}
290
291
292
293
294
295
296
297
298
299
300
301static int
302spider_net_init_chain(struct spider_net_card *card,
303 struct spider_net_descr_chain *chain)
304{
305 int i;
306 struct spider_net_descr *descr;
307 struct spider_net_hw_descr *hwdescr;
308 dma_addr_t buf;
309 size_t alloc_size;
310
311 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
312
313 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
314 &chain->dma_addr, GFP_KERNEL);
315 if (!chain->hwring)
316 return -ENOMEM;
317
318
319 descr = chain->ring;
320 hwdescr = chain->hwring;
321 buf = chain->dma_addr;
322 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
323 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
324 hwdescr->next_descr_addr = 0;
325
326 descr->hwdescr = hwdescr;
327 descr->bus_addr = buf;
328 descr->next = descr + 1;
329 descr->prev = descr - 1;
330
331 buf += sizeof(struct spider_net_hw_descr);
332 }
333
334 (descr-1)->next = chain->ring;
335 chain->ring->prev = descr-1;
336
337 spin_lock_init(&chain->lock);
338 chain->head = chain->ring;
339 chain->tail = chain->ring;
340 return 0;
341}
342
343
344
345
346
347
348
349static void
350spider_net_free_rx_chain_contents(struct spider_net_card *card)
351{
352 struct spider_net_descr *descr;
353
354 descr = card->rx_chain.head;
355 do {
356 if (descr->skb) {
357 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
358 SPIDER_NET_MAX_FRAME,
359 PCI_DMA_BIDIRECTIONAL);
360 dev_kfree_skb(descr->skb);
361 descr->skb = NULL;
362 }
363 descr = descr->next;
364 } while (descr != card->rx_chain.head);
365}
366
367
368
369
370
371
372
373
374
375
376
377static int
378spider_net_prepare_rx_descr(struct spider_net_card *card,
379 struct spider_net_descr *descr)
380{
381 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
382 dma_addr_t buf;
383 int offset;
384 int bufsize;
385
386
387 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
388 (~(SPIDER_NET_RXBUF_ALIGN - 1));
389
390
391
392
393
394 descr->skb = netdev_alloc_skb(card->netdev,
395 bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
396 if (!descr->skb) {
397 if (netif_msg_rx_err(card) && net_ratelimit())
398 dev_err(&card->netdev->dev,
399 "Not enough memory to allocate rx buffer\n");
400 card->spider_stats.alloc_rx_skb_error++;
401 return -ENOMEM;
402 }
403 hwdescr->buf_size = bufsize;
404 hwdescr->result_size = 0;
405 hwdescr->valid_size = 0;
406 hwdescr->data_status = 0;
407 hwdescr->data_error = 0;
408
409 offset = ((unsigned long)descr->skb->data) &
410 (SPIDER_NET_RXBUF_ALIGN - 1);
411 if (offset)
412 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
413
414 buf = pci_map_single(card->pdev, descr->skb->data,
415 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
416 if (pci_dma_mapping_error(card->pdev, buf)) {
417 dev_kfree_skb_any(descr->skb);
418 descr->skb = NULL;
419 if (netif_msg_rx_err(card) && net_ratelimit())
420 dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n");
421 card->spider_stats.rx_iommu_map_error++;
422 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
423 } else {
424 hwdescr->buf_addr = buf;
425 wmb();
426 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
427 SPIDER_NET_DMAC_NOINTR_COMPLETE;
428 }
429
430 return 0;
431}
432
433
434
435
436
437
438
439
440
441static inline void
442spider_net_enable_rxchtails(struct spider_net_card *card)
443{
444
445 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
446 card->rx_chain.tail->bus_addr);
447}
448
449
450
451
452
453
454
455
456static inline void
457spider_net_enable_rxdmac(struct spider_net_card *card)
458{
459 wmb();
460 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
461 SPIDER_NET_DMA_RX_VALUE);
462}
463
464
465
466
467
468
469
470
471static inline void
472spider_net_disable_rxdmac(struct spider_net_card *card)
473{
474 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
475 SPIDER_NET_DMA_RX_FEND_VALUE);
476}
477
478
479
480
481
482
483
484static void
485spider_net_refill_rx_chain(struct spider_net_card *card)
486{
487 struct spider_net_descr_chain *chain = &card->rx_chain;
488 unsigned long flags;
489
490
491
492
493
494
495 if (!spin_trylock_irqsave(&chain->lock, flags))
496 return;
497
498 while (spider_net_get_descr_status(chain->head->hwdescr) ==
499 SPIDER_NET_DESCR_NOT_IN_USE) {
500 if (spider_net_prepare_rx_descr(card, chain->head))
501 break;
502 chain->head = chain->head->next;
503 }
504
505 spin_unlock_irqrestore(&chain->lock, flags);
506}
507
508
509
510
511
512
513
514static int
515spider_net_alloc_rx_skbs(struct spider_net_card *card)
516{
517 struct spider_net_descr_chain *chain = &card->rx_chain;
518 struct spider_net_descr *start = chain->tail;
519 struct spider_net_descr *descr = start;
520
521
522 do {
523 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
524 descr = descr->next;
525 } while (descr != start);
526
527
528
529
530
531 if (spider_net_prepare_rx_descr(card, chain->head))
532 goto error;
533 else
534 chain->head = chain->head->next;
535
536
537
538
539 spider_net_refill_rx_chain(card);
540 spider_net_enable_rxdmac(card);
541 return 0;
542
543error:
544 spider_net_free_rx_chain_contents(card);
545 return -ENOMEM;
546}
547
548
549
550
551
552
553
554
555
556
557
558static u8
559spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
560{
561 u32 crc;
562 u8 hash;
563 char addr_for_crc[ETH_ALEN] = { 0, };
564 int i, bit;
565
566 for (i = 0; i < ETH_ALEN * 8; i++) {
567 bit = (addr[i / 8] >> (i % 8)) & 1;
568 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
569 }
570
571 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
572
573 hash = (crc >> 27);
574 hash <<= 3;
575 hash |= crc & 7;
576 hash &= 0xff;
577
578 return hash;
579}
580
581
582
583
584
585
586
587
588
589static void
590spider_net_set_multi(struct net_device *netdev)
591{
592 struct netdev_hw_addr *ha;
593 u8 hash;
594 int i;
595 u32 reg;
596 struct spider_net_card *card = netdev_priv(netdev);
597 DECLARE_BITMAP(bitmask, SPIDER_NET_MULTICAST_HASHES) = {};
598
599 spider_net_set_promisc(card);
600
601 if (netdev->flags & IFF_ALLMULTI) {
602 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
603 set_bit(i, bitmask);
604 }
605 goto write_hash;
606 }
607
608
609
610 set_bit(0xfd, bitmask);
611
612 netdev_for_each_mc_addr(ha, netdev) {
613 hash = spider_net_get_multicast_hash(netdev, ha->addr);
614 set_bit(hash, bitmask);
615 }
616
617write_hash:
618 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
619 reg = 0;
620 if (test_bit(i * 4, bitmask))
621 reg += 0x08;
622 reg <<= 8;
623 if (test_bit(i * 4 + 1, bitmask))
624 reg += 0x08;
625 reg <<= 8;
626 if (test_bit(i * 4 + 2, bitmask))
627 reg += 0x08;
628 reg <<= 8;
629 if (test_bit(i * 4 + 3, bitmask))
630 reg += 0x08;
631
632 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
633 }
634}
635
636
637
638
639
640
641
642
643
644
645
646static int
647spider_net_prepare_tx_descr(struct spider_net_card *card,
648 struct sk_buff *skb)
649{
650 struct spider_net_descr_chain *chain = &card->tx_chain;
651 struct spider_net_descr *descr;
652 struct spider_net_hw_descr *hwdescr;
653 dma_addr_t buf;
654 unsigned long flags;
655
656 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
657 if (pci_dma_mapping_error(card->pdev, buf)) {
658 if (netif_msg_tx_err(card) && net_ratelimit())
659 dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). "
660 "Dropping packet\n", skb->data, skb->len);
661 card->spider_stats.tx_iommu_map_error++;
662 return -ENOMEM;
663 }
664
665 spin_lock_irqsave(&chain->lock, flags);
666 descr = card->tx_chain.head;
667 if (descr->next == chain->tail->prev) {
668 spin_unlock_irqrestore(&chain->lock, flags);
669 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
670 return -ENOMEM;
671 }
672 hwdescr = descr->hwdescr;
673 chain->head = descr->next;
674
675 descr->skb = skb;
676 hwdescr->buf_addr = buf;
677 hwdescr->buf_size = skb->len;
678 hwdescr->next_descr_addr = 0;
679 hwdescr->data_status = 0;
680
681 hwdescr->dmac_cmd_status =
682 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL;
683 spin_unlock_irqrestore(&chain->lock, flags);
684
685 if (skb->ip_summed == CHECKSUM_PARTIAL)
686 switch (ip_hdr(skb)->protocol) {
687 case IPPROTO_TCP:
688 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
689 break;
690 case IPPROTO_UDP:
691 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
692 break;
693 }
694
695
696 wmb();
697 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
698
699 netif_trans_update(card->netdev);
700 return 0;
701}
702
703static int
704spider_net_set_low_watermark(struct spider_net_card *card)
705{
706 struct spider_net_descr *descr = card->tx_chain.tail;
707 struct spider_net_hw_descr *hwdescr;
708 unsigned long flags;
709 int status;
710 int cnt=0;
711 int i;
712
713
714
715
716 while (descr != card->tx_chain.head) {
717 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
718 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
719 break;
720 descr = descr->next;
721 cnt++;
722 }
723
724
725 if (cnt < card->tx_chain.num_desc/4)
726 return cnt;
727
728
729 descr = card->tx_chain.tail;
730 cnt = (cnt*3)/4;
731 for (i=0;i<cnt; i++)
732 descr = descr->next;
733
734
735 spin_lock_irqsave(&card->tx_chain.lock, flags);
736 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
737 if (card->low_watermark && card->low_watermark != descr) {
738 hwdescr = card->low_watermark->hwdescr;
739 hwdescr->dmac_cmd_status =
740 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
741 }
742 card->low_watermark = descr;
743 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
744 return cnt;
745}
746
747
748
749
750
751
752
753
754
755
756
757
758
759static int
760spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
761{
762 struct net_device *dev = card->netdev;
763 struct spider_net_descr_chain *chain = &card->tx_chain;
764 struct spider_net_descr *descr;
765 struct spider_net_hw_descr *hwdescr;
766 struct sk_buff *skb;
767 u32 buf_addr;
768 unsigned long flags;
769 int status;
770
771 while (1) {
772 spin_lock_irqsave(&chain->lock, flags);
773 if (chain->tail == chain->head) {
774 spin_unlock_irqrestore(&chain->lock, flags);
775 return 0;
776 }
777 descr = chain->tail;
778 hwdescr = descr->hwdescr;
779
780 status = spider_net_get_descr_status(hwdescr);
781 switch (status) {
782 case SPIDER_NET_DESCR_COMPLETE:
783 dev->stats.tx_packets++;
784 dev->stats.tx_bytes += descr->skb->len;
785 break;
786
787 case SPIDER_NET_DESCR_CARDOWNED:
788 if (!brutal) {
789 spin_unlock_irqrestore(&chain->lock, flags);
790 return 1;
791 }
792
793
794
795
796
797 fallthrough;
798
799 case SPIDER_NET_DESCR_RESPONSE_ERROR:
800 case SPIDER_NET_DESCR_PROTECTION_ERROR:
801 case SPIDER_NET_DESCR_FORCE_END:
802 if (netif_msg_tx_err(card))
803 dev_err(&card->netdev->dev, "forcing end of tx descriptor "
804 "with status x%02x\n", status);
805 dev->stats.tx_errors++;
806 break;
807
808 default:
809 dev->stats.tx_dropped++;
810 if (!brutal) {
811 spin_unlock_irqrestore(&chain->lock, flags);
812 return 1;
813 }
814 }
815
816 chain->tail = descr->next;
817 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
818 skb = descr->skb;
819 descr->skb = NULL;
820 buf_addr = hwdescr->buf_addr;
821 spin_unlock_irqrestore(&chain->lock, flags);
822
823
824 if (skb) {
825 pci_unmap_single(card->pdev, buf_addr, skb->len,
826 PCI_DMA_TODEVICE);
827 dev_consume_skb_any(skb);
828 }
829 }
830 return 0;
831}
832
833
834
835
836
837
838
839
840
841
842
843
844static inline void
845spider_net_kick_tx_dma(struct spider_net_card *card)
846{
847 struct spider_net_descr *descr;
848
849 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
850 SPIDER_NET_TX_DMA_EN)
851 goto out;
852
853 descr = card->tx_chain.tail;
854 for (;;) {
855 if (spider_net_get_descr_status(descr->hwdescr) ==
856 SPIDER_NET_DESCR_CARDOWNED) {
857 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
858 descr->bus_addr);
859 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
860 SPIDER_NET_DMA_TX_VALUE);
861 break;
862 }
863 if (descr == card->tx_chain.head)
864 break;
865 descr = descr->next;
866 }
867
868out:
869 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
870}
871
872
873
874
875
876
877
878
879static netdev_tx_t
880spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
881{
882 int cnt;
883 struct spider_net_card *card = netdev_priv(netdev);
884
885 spider_net_release_tx_chain(card, 0);
886
887 if (spider_net_prepare_tx_descr(card, skb) != 0) {
888 netdev->stats.tx_dropped++;
889 netif_stop_queue(netdev);
890 return NETDEV_TX_BUSY;
891 }
892
893 cnt = spider_net_set_low_watermark(card);
894 if (cnt < 5)
895 spider_net_kick_tx_dma(card);
896 return NETDEV_TX_OK;
897}
898
899
900
901
902
903
904
905
906
907
908static void
909spider_net_cleanup_tx_ring(struct timer_list *t)
910{
911 struct spider_net_card *card = from_timer(card, t, tx_timer);
912 if ((spider_net_release_tx_chain(card, 0) != 0) &&
913 (card->netdev->flags & IFF_UP)) {
914 spider_net_kick_tx_dma(card);
915 netif_wake_queue(card->netdev);
916 }
917}
918
919
920
921
922
923
924
925
926
927
928static int
929spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
930{
931 switch (cmd) {
932 default:
933 return -EOPNOTSUPP;
934 }
935}
936
937
938
939
940
941
942
943
944
945static void
946spider_net_pass_skb_up(struct spider_net_descr *descr,
947 struct spider_net_card *card)
948{
949 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
950 struct sk_buff *skb = descr->skb;
951 struct net_device *netdev = card->netdev;
952 u32 data_status = hwdescr->data_status;
953 u32 data_error = hwdescr->data_error;
954
955 skb_put(skb, hwdescr->valid_size);
956
957
958
959
960#define SPIDER_MISALIGN 2
961 skb_pull(skb, SPIDER_MISALIGN);
962 skb->protocol = eth_type_trans(skb, netdev);
963
964
965 skb_checksum_none_assert(skb);
966 if (netdev->features & NETIF_F_RXCSUM) {
967 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
968 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
969 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
970 skb->ip_summed = CHECKSUM_UNNECESSARY;
971 }
972
973 if (data_status & SPIDER_NET_VLAN_PACKET) {
974
975 }
976
977
978 netdev->stats.rx_packets++;
979 netdev->stats.rx_bytes += skb->len;
980
981
982 netif_receive_skb(skb);
983}
984
985static void show_rx_chain(struct spider_net_card *card)
986{
987 struct spider_net_descr_chain *chain = &card->rx_chain;
988 struct spider_net_descr *start= chain->tail;
989 struct spider_net_descr *descr= start;
990 struct spider_net_hw_descr *hwd = start->hwdescr;
991 struct device *dev = &card->netdev->dev;
992 u32 curr_desc, next_desc;
993 int status;
994
995 int tot = 0;
996 int cnt = 0;
997 int off = start - chain->ring;
998 int cstat = hwd->dmac_cmd_status;
999
1000 dev_info(dev, "Total number of descrs=%d\n",
1001 chain->num_desc);
1002 dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n",
1003 off, cstat);
1004
1005 curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA);
1006 next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA);
1007
1008 status = cstat;
1009 do
1010 {
1011 hwd = descr->hwdescr;
1012 off = descr - chain->ring;
1013 status = hwd->dmac_cmd_status;
1014
1015 if (descr == chain->head)
1016 dev_info(dev, "Chain head is at %d, head status=0x%x\n",
1017 off, status);
1018
1019 if (curr_desc == descr->bus_addr)
1020 dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n",
1021 off, status);
1022
1023 if (next_desc == descr->bus_addr)
1024 dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n",
1025 off, status);
1026
1027 if (hwd->next_descr_addr == 0)
1028 dev_info(dev, "chain is cut at %d\n", off);
1029
1030 if (cstat != status) {
1031 int from = (chain->num_desc + off - cnt) % chain->num_desc;
1032 int to = (chain->num_desc + off - 1) % chain->num_desc;
1033 dev_info(dev, "Have %d (from %d to %d) descrs "
1034 "with stat=0x%08x\n", cnt, from, to, cstat);
1035 cstat = status;
1036 cnt = 0;
1037 }
1038
1039 cnt ++;
1040 tot ++;
1041 descr = descr->next;
1042 } while (descr != start);
1043
1044 dev_info(dev, "Last %d descrs with stat=0x%08x "
1045 "for a total of %d descrs\n", cnt, cstat, tot);
1046
1047#ifdef DEBUG
1048
1049 descr = start;
1050 do
1051 {
1052 struct spider_net_hw_descr *hwd = descr->hwdescr;
1053 status = spider_net_get_descr_status(hwd);
1054 cnt = descr - chain->ring;
1055 dev_info(dev, "Descr %d stat=0x%08x skb=%p\n",
1056 cnt, status, descr->skb);
1057 dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n",
1058 descr->bus_addr, hwd->buf_addr, hwd->buf_size);
1059 dev_info(dev, "next=%08x result sz=%d valid sz=%d\n",
1060 hwd->next_descr_addr, hwd->result_size,
1061 hwd->valid_size);
1062 dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n",
1063 hwd->dmac_cmd_status, hwd->data_status,
1064 hwd->data_error);
1065 dev_info(dev, "\n");
1066
1067 descr = descr->next;
1068 } while (descr != start);
1069#endif
1070
1071}
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083static void spider_net_resync_head_ptr(struct spider_net_card *card)
1084{
1085 unsigned long flags;
1086 struct spider_net_descr_chain *chain = &card->rx_chain;
1087 struct spider_net_descr *descr;
1088 int i, status;
1089
1090
1091 descr = chain->head;
1092 status = spider_net_get_descr_status(descr->hwdescr);
1093
1094 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
1095 return;
1096
1097 spin_lock_irqsave(&chain->lock, flags);
1098
1099 descr = chain->head;
1100 status = spider_net_get_descr_status(descr->hwdescr);
1101 for (i=0; i<chain->num_desc; i++) {
1102 if (status != SPIDER_NET_DESCR_CARDOWNED) break;
1103 descr = descr->next;
1104 status = spider_net_get_descr_status(descr->hwdescr);
1105 }
1106 chain->head = descr;
1107
1108 spin_unlock_irqrestore(&chain->lock, flags);
1109}
1110
1111static int spider_net_resync_tail_ptr(struct spider_net_card *card)
1112{
1113 struct spider_net_descr_chain *chain = &card->rx_chain;
1114 struct spider_net_descr *descr;
1115 int i, status;
1116
1117
1118 descr = chain->tail;
1119 status = spider_net_get_descr_status(descr->hwdescr);
1120
1121 for (i=0; i<chain->num_desc; i++) {
1122 if ((status != SPIDER_NET_DESCR_CARDOWNED) &&
1123 (status != SPIDER_NET_DESCR_NOT_IN_USE)) break;
1124 descr = descr->next;
1125 status = spider_net_get_descr_status(descr->hwdescr);
1126 }
1127 chain->tail = descr;
1128
1129 if ((i == chain->num_desc) || (i == 0))
1130 return 1;
1131 return 0;
1132}
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145static int
1146spider_net_decode_one_descr(struct spider_net_card *card)
1147{
1148 struct net_device *dev = card->netdev;
1149 struct spider_net_descr_chain *chain = &card->rx_chain;
1150 struct spider_net_descr *descr = chain->tail;
1151 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
1152 u32 hw_buf_addr;
1153 int status;
1154
1155 status = spider_net_get_descr_status(hwdescr);
1156
1157
1158 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1159 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1160 return 0;
1161
1162
1163 chain->tail = descr->next;
1164
1165
1166 hw_buf_addr = hwdescr->buf_addr;
1167 hwdescr->buf_addr = 0xffffffff;
1168 pci_unmap_single(card->pdev, hw_buf_addr,
1169 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1170
1171 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1172 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1173 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1174 if (netif_msg_rx_err(card))
1175 dev_err(&dev->dev,
1176 "dropping RX descriptor with state %d\n", status);
1177 dev->stats.rx_dropped++;
1178 goto bad_desc;
1179 }
1180
1181 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1182 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1183 if (netif_msg_rx_err(card))
1184 dev_err(&card->netdev->dev,
1185 "RX descriptor with unknown state %d\n", status);
1186 card->spider_stats.rx_desc_unk_state++;
1187 goto bad_desc;
1188 }
1189
1190
1191 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
1192 if (netif_msg_rx_err(card))
1193 dev_err(&card->netdev->dev,
1194 "error in received descriptor found, "
1195 "data_status=x%08x, data_error=x%08x\n",
1196 hwdescr->data_status, hwdescr->data_error);
1197 goto bad_desc;
1198 }
1199
1200 if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) {
1201 dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n",
1202 hwdescr->dmac_cmd_status);
1203 pr_err("buf_addr=x%08x\n", hw_buf_addr);
1204 pr_err("buf_size=x%08x\n", hwdescr->buf_size);
1205 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
1206 pr_err("result_size=x%08x\n", hwdescr->result_size);
1207 pr_err("valid_size=x%08x\n", hwdescr->valid_size);
1208 pr_err("data_status=x%08x\n", hwdescr->data_status);
1209 pr_err("data_error=x%08x\n", hwdescr->data_error);
1210 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1211
1212 card->spider_stats.rx_desc_error++;
1213 goto bad_desc;
1214 }
1215
1216
1217 spider_net_pass_skb_up(descr, card);
1218 descr->skb = NULL;
1219 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1220 return 1;
1221
1222bad_desc:
1223 if (netif_msg_rx_err(card))
1224 show_rx_chain(card);
1225 dev_kfree_skb_irq(descr->skb);
1226 descr->skb = NULL;
1227 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1228 return 0;
1229}
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243static int spider_net_poll(struct napi_struct *napi, int budget)
1244{
1245 struct spider_net_card *card = container_of(napi, struct spider_net_card, napi);
1246 int packets_done = 0;
1247
1248 while (packets_done < budget) {
1249 if (!spider_net_decode_one_descr(card))
1250 break;
1251
1252 packets_done++;
1253 }
1254
1255 if ((packets_done == 0) && (card->num_rx_ints != 0)) {
1256 if (!spider_net_resync_tail_ptr(card))
1257 packets_done = budget;
1258 spider_net_resync_head_ptr(card);
1259 }
1260 card->num_rx_ints = 0;
1261
1262 spider_net_refill_rx_chain(card);
1263 spider_net_enable_rxdmac(card);
1264
1265 spider_net_cleanup_tx_ring(&card->tx_timer);
1266
1267
1268
1269 if (packets_done < budget) {
1270 napi_complete_done(napi, packets_done);
1271 spider_net_rx_irq_on(card);
1272 card->ignore_rx_ramfull = 0;
1273 }
1274
1275 return packets_done;
1276}
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286static int
1287spider_net_set_mac(struct net_device *netdev, void *p)
1288{
1289 struct spider_net_card *card = netdev_priv(netdev);
1290 u32 macl, macu, regvalue;
1291 struct sockaddr *addr = p;
1292
1293 if (!is_valid_ether_addr(addr->sa_data))
1294 return -EADDRNOTAVAIL;
1295
1296 memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
1297
1298
1299 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1300 regvalue &= ~((1 << 5) | (1 << 6));
1301 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1302
1303
1304 macu = (netdev->dev_addr[0]<<24) + (netdev->dev_addr[1]<<16) +
1305 (netdev->dev_addr[2]<<8) + (netdev->dev_addr[3]);
1306 macl = (netdev->dev_addr[4]<<8) + (netdev->dev_addr[5]);
1307 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1308 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1309
1310
1311 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1312 regvalue |= ((1 << 5) | (1 << 6));
1313 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1314
1315 spider_net_set_promisc(card);
1316
1317 return 0;
1318}
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328static void
1329spider_net_link_reset(struct net_device *netdev)
1330{
1331
1332 struct spider_net_card *card = netdev_priv(netdev);
1333
1334 del_timer_sync(&card->aneg_timer);
1335
1336
1337 spider_net_write_reg(card, SPIDER_NET_GMACST,
1338 spider_net_read_reg(card, SPIDER_NET_GMACST));
1339 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1340
1341
1342 card->aneg_count = 0;
1343 card->medium = BCM54XX_COPPER;
1344 spider_net_setup_aneg(card);
1345 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1346
1347}
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359static void
1360spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg,
1361 u32 error_reg1, u32 error_reg2)
1362{
1363 u32 i;
1364 int show_error = 1;
1365
1366
1367 if (status_reg)
1368 for (i = 0; i < 32; i++)
1369 if (status_reg & (1<<i))
1370 switch (i)
1371 {
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381 case SPIDER_NET_GIPSINT:
1382 show_error = 0;
1383 break;
1384
1385 case SPIDER_NET_GPWOPCMPINT:
1386
1387 show_error = 0;
1388 break;
1389 case SPIDER_NET_GPROPCMPINT:
1390
1391
1392
1393
1394
1395 show_error = 0;
1396 break;
1397 case SPIDER_NET_GPWFFINT:
1398
1399 if (netif_msg_intr(card))
1400 dev_err(&card->netdev->dev, "PHY write queue full\n");
1401 show_error = 0;
1402 break;
1403
1404
1405
1406
1407
1408 case SPIDER_NET_GDTDEN0INT:
1409
1410 show_error = 0;
1411 break;
1412
1413 case SPIDER_NET_GDDDEN0INT:
1414 case SPIDER_NET_GDCDEN0INT:
1415 case SPIDER_NET_GDBDEN0INT:
1416 case SPIDER_NET_GDADEN0INT:
1417
1418 show_error = 0;
1419 break;
1420
1421
1422 case SPIDER_NET_GDDFDCINT:
1423 case SPIDER_NET_GDCFDCINT:
1424 case SPIDER_NET_GDBFDCINT:
1425 case SPIDER_NET_GDAFDCINT:
1426
1427
1428
1429
1430
1431 show_error = 0;
1432 break;
1433
1434
1435 case SPIDER_NET_GDTFDCINT:
1436 show_error = 0;
1437 break;
1438 case SPIDER_NET_GTTEDINT:
1439 show_error = 0;
1440 break;
1441 case SPIDER_NET_GDTDCEINT:
1442
1443
1444
1445
1446
1447 show_error = 0;
1448 break;
1449
1450
1451
1452 }
1453
1454
1455 if (error_reg1)
1456 for (i = 0; i < 32; i++)
1457 if (error_reg1 & (1<<i))
1458 switch (i)
1459 {
1460 case SPIDER_NET_GTMFLLINT:
1461
1462
1463
1464 show_error = 0;
1465 break;
1466 case SPIDER_NET_GRFDFLLINT:
1467 case SPIDER_NET_GRFCFLLINT:
1468 case SPIDER_NET_GRFBFLLINT:
1469 case SPIDER_NET_GRFAFLLINT:
1470 case SPIDER_NET_GRMFLLINT:
1471
1472 if (card->ignore_rx_ramfull == 0) {
1473 card->ignore_rx_ramfull = 1;
1474 spider_net_resync_head_ptr(card);
1475 spider_net_refill_rx_chain(card);
1476 spider_net_enable_rxdmac(card);
1477 card->num_rx_ints ++;
1478 napi_schedule(&card->napi);
1479 }
1480 show_error = 0;
1481 break;
1482
1483
1484 case SPIDER_NET_GDTINVDINT:
1485
1486 show_error = 0;
1487 break;
1488
1489
1490 case SPIDER_NET_GDDDCEINT:
1491 case SPIDER_NET_GDCDCEINT:
1492 case SPIDER_NET_GDBDCEINT:
1493 case SPIDER_NET_GDADCEINT:
1494 spider_net_resync_head_ptr(card);
1495 spider_net_refill_rx_chain(card);
1496 spider_net_enable_rxdmac(card);
1497 card->num_rx_ints ++;
1498 napi_schedule(&card->napi);
1499 show_error = 0;
1500 break;
1501
1502
1503 case SPIDER_NET_GDDINVDINT:
1504 case SPIDER_NET_GDCINVDINT:
1505 case SPIDER_NET_GDBINVDINT:
1506 case SPIDER_NET_GDAINVDINT:
1507
1508 spider_net_resync_head_ptr(card);
1509 spider_net_refill_rx_chain(card);
1510 spider_net_enable_rxdmac(card);
1511 card->num_rx_ints ++;
1512 napi_schedule(&card->napi);
1513 show_error = 0;
1514 break;
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527 default:
1528 show_error = 1;
1529 break;
1530 }
1531
1532
1533 if (error_reg2)
1534 for (i = 0; i < 32; i++)
1535 if (error_reg2 & (1<<i))
1536 switch (i)
1537 {
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563 default:
1564 break;
1565 }
1566
1567 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
1568 dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, "
1569 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1570 status_reg, error_reg1, error_reg2);
1571
1572
1573 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1574 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1575}
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588static irqreturn_t
1589spider_net_interrupt(int irq, void *ptr)
1590{
1591 struct net_device *netdev = ptr;
1592 struct spider_net_card *card = netdev_priv(netdev);
1593 u32 status_reg, error_reg1, error_reg2;
1594
1595 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1596 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1597 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1598
1599 if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) &&
1600 !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) &&
1601 !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE))
1602 return IRQ_NONE;
1603
1604 if (status_reg & SPIDER_NET_RXINT ) {
1605 spider_net_rx_irq_off(card);
1606 napi_schedule(&card->napi);
1607 card->num_rx_ints ++;
1608 }
1609 if (status_reg & SPIDER_NET_TXINT)
1610 napi_schedule(&card->napi);
1611
1612 if (status_reg & SPIDER_NET_LINKINT)
1613 spider_net_link_reset(netdev);
1614
1615 if (status_reg & SPIDER_NET_ERRINT )
1616 spider_net_handle_error_irq(card, status_reg,
1617 error_reg1, error_reg2);
1618
1619
1620 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1621
1622 return IRQ_HANDLED;
1623}
1624
1625#ifdef CONFIG_NET_POLL_CONTROLLER
1626
1627
1628
1629
1630
1631
1632static void
1633spider_net_poll_controller(struct net_device *netdev)
1634{
1635 disable_irq(netdev->irq);
1636 spider_net_interrupt(netdev->irq, netdev);
1637 enable_irq(netdev->irq);
1638}
1639#endif
1640
1641
1642
1643
1644
1645
1646
1647static void
1648spider_net_enable_interrupts(struct spider_net_card *card)
1649{
1650 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1651 SPIDER_NET_INT0_MASK_VALUE);
1652 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1653 SPIDER_NET_INT1_MASK_VALUE);
1654 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1655 SPIDER_NET_INT2_MASK_VALUE);
1656}
1657
1658
1659
1660
1661
1662
1663
1664static void
1665spider_net_disable_interrupts(struct spider_net_card *card)
1666{
1667 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1668 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1669 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1670 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1671}
1672
1673
1674
1675
1676
1677
1678
1679
1680static void
1681spider_net_init_card(struct spider_net_card *card)
1682{
1683 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1684 SPIDER_NET_CKRCTRL_STOP_VALUE);
1685
1686 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1687 SPIDER_NET_CKRCTRL_RUN_VALUE);
1688
1689
1690 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1691 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1692
1693 spider_net_disable_interrupts(card);
1694}
1695
1696
1697
1698
1699
1700
1701
1702static void
1703spider_net_enable_card(struct spider_net_card *card)
1704{
1705 int i;
1706
1707
1708
1709 u32 regs[][2] = {
1710 { SPIDER_NET_GRESUMINTNUM, 0 },
1711 { SPIDER_NET_GREINTNUM, 0 },
1712
1713
1714
1715 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1716 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1717 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1718 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1719
1720 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1721
1722
1723 { SPIDER_NET_GFREECNNUM, 0 },
1724 { SPIDER_NET_GONETIMENUM, 0 },
1725 { SPIDER_NET_GTOUTFRMNUM, 0 },
1726
1727
1728 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1729
1730 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1731
1732 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1733
1734 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1735
1736 { SPIDER_NET_GMRWOLCTRL, 0 },
1737 { SPIDER_NET_GTESTMD, 0x10000000 },
1738 { SPIDER_NET_GTTQMSK, 0x00400040 },
1739
1740 { SPIDER_NET_GMACINTEN, 0 },
1741
1742
1743 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1744 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1745
1746 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1747 { 0, 0}
1748 };
1749
1750 i = 0;
1751 while (regs[i][0]) {
1752 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1753 i++;
1754 }
1755
1756
1757 for (i = 1; i <= 14; i++) {
1758 spider_net_write_reg(card,
1759 SPIDER_NET_GMRUAFILnR + i * 8,
1760 0x00080000);
1761 spider_net_write_reg(card,
1762 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1763 0x00000000);
1764 }
1765
1766 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1767
1768 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1769
1770
1771
1772
1773 spider_net_enable_rxchtails(card);
1774 spider_net_enable_rxdmac(card);
1775
1776 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1777
1778 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1779 SPIDER_NET_LENLMT_VALUE);
1780 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1781 SPIDER_NET_OPMODE_VALUE);
1782
1783 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1784 SPIDER_NET_GDTBSTA);
1785}
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795static int
1796spider_net_download_firmware(struct spider_net_card *card,
1797 const void *firmware_ptr)
1798{
1799 int sequencer, i;
1800 const u32 *fw_ptr = firmware_ptr;
1801
1802
1803 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1804 SPIDER_NET_STOP_SEQ_VALUE);
1805
1806 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1807 sequencer++) {
1808 spider_net_write_reg(card,
1809 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1810 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1811 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1812 sequencer * 8, *fw_ptr);
1813 fw_ptr++;
1814 }
1815 }
1816
1817 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1818 return -EIO;
1819
1820 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1821 SPIDER_NET_RUN_SEQ_VALUE);
1822
1823 return 0;
1824}
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852static int
1853spider_net_init_firmware(struct spider_net_card *card)
1854{
1855 struct firmware *firmware = NULL;
1856 struct device_node *dn;
1857 const u8 *fw_prop = NULL;
1858 int err = -ENOENT;
1859 int fw_size;
1860
1861 if (request_firmware((const struct firmware **)&firmware,
1862 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1863 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1864 netif_msg_probe(card) ) {
1865 dev_err(&card->netdev->dev,
1866 "Incorrect size of spidernet firmware in " \
1867 "filesystem. Looking in host firmware...\n");
1868 goto try_host_fw;
1869 }
1870 err = spider_net_download_firmware(card, firmware->data);
1871
1872 release_firmware(firmware);
1873 if (err)
1874 goto try_host_fw;
1875
1876 goto done;
1877 }
1878
1879try_host_fw:
1880 dn = pci_device_to_OF_node(card->pdev);
1881 if (!dn)
1882 goto out_err;
1883
1884 fw_prop = of_get_property(dn, "firmware", &fw_size);
1885 if (!fw_prop)
1886 goto out_err;
1887
1888 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1889 netif_msg_probe(card) ) {
1890 dev_err(&card->netdev->dev,
1891 "Incorrect size of spidernet firmware in host firmware\n");
1892 goto done;
1893 }
1894
1895 err = spider_net_download_firmware(card, fw_prop);
1896
1897done:
1898 return err;
1899out_err:
1900 if (netif_msg_probe(card))
1901 dev_err(&card->netdev->dev,
1902 "Couldn't find spidernet firmware in filesystem " \
1903 "or host firmware\n");
1904 return err;
1905}
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916int
1917spider_net_open(struct net_device *netdev)
1918{
1919 struct spider_net_card *card = netdev_priv(netdev);
1920 int result;
1921
1922 result = spider_net_init_firmware(card);
1923 if (result)
1924 goto init_firmware_failed;
1925
1926
1927 card->aneg_count = 0;
1928 card->medium = BCM54XX_COPPER;
1929 spider_net_setup_aneg(card);
1930 if (card->phy.def->phy_id)
1931 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1932
1933 result = spider_net_init_chain(card, &card->tx_chain);
1934 if (result)
1935 goto alloc_tx_failed;
1936 card->low_watermark = NULL;
1937
1938 result = spider_net_init_chain(card, &card->rx_chain);
1939 if (result)
1940 goto alloc_rx_failed;
1941
1942
1943 result = spider_net_alloc_rx_skbs(card);
1944 if (result)
1945 goto alloc_skbs_failed;
1946
1947 spider_net_set_multi(netdev);
1948
1949
1950
1951 result = -EBUSY;
1952 if (request_irq(netdev->irq, spider_net_interrupt,
1953 IRQF_SHARED, netdev->name, netdev))
1954 goto register_int_failed;
1955
1956 spider_net_enable_card(card);
1957
1958 netif_start_queue(netdev);
1959 netif_carrier_on(netdev);
1960 napi_enable(&card->napi);
1961
1962 spider_net_enable_interrupts(card);
1963
1964 return 0;
1965
1966register_int_failed:
1967 spider_net_free_rx_chain_contents(card);
1968alloc_skbs_failed:
1969 spider_net_free_chain(card, &card->rx_chain);
1970alloc_rx_failed:
1971 spider_net_free_chain(card, &card->tx_chain);
1972alloc_tx_failed:
1973 del_timer_sync(&card->aneg_timer);
1974init_firmware_failed:
1975 return result;
1976}
1977
1978
1979
1980
1981
1982static void spider_net_link_phy(struct timer_list *t)
1983{
1984 struct spider_net_card *card = from_timer(card, t, aneg_timer);
1985 struct mii_phy *phy = &card->phy;
1986
1987
1988 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
1989
1990 pr_debug("%s: link is down trying to bring it up\n",
1991 card->netdev->name);
1992
1993 switch (card->medium) {
1994 case BCM54XX_COPPER:
1995
1996 if (phy->def->ops->enable_fiber)
1997 phy->def->ops->enable_fiber(phy, 1);
1998 card->medium = BCM54XX_FIBER;
1999 break;
2000
2001 case BCM54XX_FIBER:
2002
2003 if (phy->def->ops->enable_fiber)
2004 phy->def->ops->enable_fiber(phy, 0);
2005 card->medium = BCM54XX_UNKNOWN;
2006 break;
2007
2008 case BCM54XX_UNKNOWN:
2009
2010
2011
2012 spider_net_setup_aneg(card);
2013 card->medium = BCM54XX_COPPER;
2014 break;
2015 }
2016
2017 card->aneg_count = 0;
2018 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2019 return;
2020 }
2021
2022
2023 if (!(phy->def->ops->poll_link(phy))) {
2024 card->aneg_count++;
2025 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2026 return;
2027 }
2028
2029
2030 phy->def->ops->read_link(phy);
2031
2032 spider_net_write_reg(card, SPIDER_NET_GMACST,
2033 spider_net_read_reg(card, SPIDER_NET_GMACST));
2034 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
2035
2036 if (phy->speed == 1000)
2037 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
2038 else
2039 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
2040
2041 card->aneg_count = 0;
2042
2043 pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n",
2044 card->netdev->name, phy->speed,
2045 phy->duplex == 1 ? "Full" : "Half",
2046 phy->autoneg == 1 ? "" : "no ");
2047}
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057static int
2058spider_net_setup_phy(struct spider_net_card *card)
2059{
2060 struct mii_phy *phy = &card->phy;
2061
2062 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
2063 SPIDER_NET_DMASEL_VALUE);
2064 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
2065 SPIDER_NET_PHY_CTRL_VALUE);
2066
2067 phy->dev = card->netdev;
2068 phy->mdio_read = spider_net_read_phy;
2069 phy->mdio_write = spider_net_write_phy;
2070
2071 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
2072 unsigned short id;
2073 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
2074 if (id != 0x0000 && id != 0xffff) {
2075 if (!sungem_phy_probe(phy, phy->mii_id)) {
2076 pr_info("Found %s.\n", phy->def->name);
2077 break;
2078 }
2079 }
2080 }
2081
2082 return 0;
2083}
2084
2085
2086
2087
2088
2089
2090
2091static void
2092spider_net_workaround_rxramfull(struct spider_net_card *card)
2093{
2094 int i, sequencer = 0;
2095
2096
2097 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2098 SPIDER_NET_CKRCTRL_RUN_VALUE);
2099
2100
2101 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2102 sequencer++) {
2103 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
2104 sequencer * 8, 0x0);
2105 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
2106 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2107 sequencer * 8, 0x0);
2108 }
2109 }
2110
2111
2112 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2113
2114
2115 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2116 SPIDER_NET_CKRCTRL_STOP_VALUE);
2117}
2118
2119
2120
2121
2122
2123
2124
2125int
2126spider_net_stop(struct net_device *netdev)
2127{
2128 struct spider_net_card *card = netdev_priv(netdev);
2129
2130 napi_disable(&card->napi);
2131 netif_carrier_off(netdev);
2132 netif_stop_queue(netdev);
2133 del_timer_sync(&card->tx_timer);
2134 del_timer_sync(&card->aneg_timer);
2135
2136 spider_net_disable_interrupts(card);
2137
2138 free_irq(netdev->irq, netdev);
2139
2140 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2141 SPIDER_NET_DMA_TX_FEND_VALUE);
2142
2143
2144 spider_net_disable_rxdmac(card);
2145
2146
2147 spider_net_release_tx_chain(card, 1);
2148 spider_net_free_rx_chain_contents(card);
2149
2150 spider_net_free_chain(card, &card->tx_chain);
2151 spider_net_free_chain(card, &card->rx_chain);
2152
2153 return 0;
2154}
2155
2156
2157
2158
2159
2160
2161
2162
2163static void
2164spider_net_tx_timeout_task(struct work_struct *work)
2165{
2166 struct spider_net_card *card =
2167 container_of(work, struct spider_net_card, tx_timeout_task);
2168 struct net_device *netdev = card->netdev;
2169
2170 if (!(netdev->flags & IFF_UP))
2171 goto out;
2172
2173 netif_device_detach(netdev);
2174 spider_net_stop(netdev);
2175
2176 spider_net_workaround_rxramfull(card);
2177 spider_net_init_card(card);
2178
2179 if (spider_net_setup_phy(card))
2180 goto out;
2181
2182 spider_net_open(netdev);
2183 spider_net_kick_tx_dma(card);
2184 netif_device_attach(netdev);
2185
2186out:
2187 atomic_dec(&card->tx_timeout_task_counter);
2188}
2189
2190
2191
2192
2193
2194
2195
2196
2197static void
2198spider_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
2199{
2200 struct spider_net_card *card;
2201
2202 card = netdev_priv(netdev);
2203 atomic_inc(&card->tx_timeout_task_counter);
2204 if (netdev->flags & IFF_UP)
2205 schedule_work(&card->tx_timeout_task);
2206 else
2207 atomic_dec(&card->tx_timeout_task_counter);
2208 card->spider_stats.tx_timeouts++;
2209}
2210
2211static const struct net_device_ops spider_net_ops = {
2212 .ndo_open = spider_net_open,
2213 .ndo_stop = spider_net_stop,
2214 .ndo_start_xmit = spider_net_xmit,
2215 .ndo_set_rx_mode = spider_net_set_multi,
2216 .ndo_set_mac_address = spider_net_set_mac,
2217 .ndo_do_ioctl = spider_net_do_ioctl,
2218 .ndo_tx_timeout = spider_net_tx_timeout,
2219 .ndo_validate_addr = eth_validate_addr,
2220
2221#ifdef CONFIG_NET_POLL_CONTROLLER
2222
2223 .ndo_poll_controller = spider_net_poll_controller,
2224#endif
2225};
2226
2227
2228
2229
2230
2231
2232
2233static void
2234spider_net_setup_netdev_ops(struct net_device *netdev)
2235{
2236 netdev->netdev_ops = &spider_net_ops;
2237 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2238
2239 netdev->ethtool_ops = &spider_net_ethtool_ops;
2240}
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250static int
2251spider_net_setup_netdev(struct spider_net_card *card)
2252{
2253 int result;
2254 struct net_device *netdev = card->netdev;
2255 struct device_node *dn;
2256 struct sockaddr addr;
2257 const u8 *mac;
2258
2259 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2260
2261 pci_set_drvdata(card->pdev, netdev);
2262
2263 timer_setup(&card->tx_timer, spider_net_cleanup_tx_ring, 0);
2264 netdev->irq = card->pdev->irq;
2265
2266 card->aneg_count = 0;
2267 timer_setup(&card->aneg_timer, spider_net_link_phy, 0);
2268
2269 netif_napi_add(netdev, &card->napi,
2270 spider_net_poll, SPIDER_NET_NAPI_WEIGHT);
2271
2272 spider_net_setup_netdev_ops(netdev);
2273
2274 netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2275 if (SPIDER_NET_RX_CSUM_DEFAULT)
2276 netdev->features |= NETIF_F_RXCSUM;
2277 netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX;
2278
2279
2280
2281
2282
2283 netdev->min_mtu = SPIDER_NET_MIN_MTU;
2284 netdev->max_mtu = SPIDER_NET_MAX_MTU;
2285
2286 netdev->irq = card->pdev->irq;
2287 card->num_rx_ints = 0;
2288 card->ignore_rx_ramfull = 0;
2289
2290 dn = pci_device_to_OF_node(card->pdev);
2291 if (!dn)
2292 return -EIO;
2293
2294 mac = of_get_property(dn, "local-mac-address", NULL);
2295 if (!mac)
2296 return -EIO;
2297 memcpy(addr.sa_data, mac, ETH_ALEN);
2298
2299 result = spider_net_set_mac(netdev, &addr);
2300 if ((result) && (netif_msg_probe(card)))
2301 dev_err(&card->netdev->dev,
2302 "Failed to set MAC address: %i\n", result);
2303
2304 result = register_netdev(netdev);
2305 if (result) {
2306 if (netif_msg_probe(card))
2307 dev_err(&card->netdev->dev,
2308 "Couldn't register net_device: %i\n", result);
2309 return result;
2310 }
2311
2312 if (netif_msg_probe(card))
2313 pr_info("Initialized device %s.\n", netdev->name);
2314
2315 return 0;
2316}
2317
2318
2319
2320
2321
2322
2323
2324
2325static struct spider_net_card *
2326spider_net_alloc_card(void)
2327{
2328 struct net_device *netdev;
2329 struct spider_net_card *card;
2330
2331 netdev = alloc_etherdev(struct_size(card, darray,
2332 tx_descriptors + rx_descriptors));
2333 if (!netdev)
2334 return NULL;
2335
2336 card = netdev_priv(netdev);
2337 card->netdev = netdev;
2338 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2339 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
2340 init_waitqueue_head(&card->waitq);
2341 atomic_set(&card->tx_timeout_task_counter, 0);
2342
2343 card->rx_chain.num_desc = rx_descriptors;
2344 card->rx_chain.ring = card->darray;
2345 card->tx_chain.num_desc = tx_descriptors;
2346 card->tx_chain.ring = card->darray + rx_descriptors;
2347
2348 return card;
2349}
2350
2351
2352
2353
2354
2355
2356
2357static void
2358spider_net_undo_pci_setup(struct spider_net_card *card)
2359{
2360 iounmap(card->regs);
2361 pci_release_regions(card->pdev);
2362}
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376static struct spider_net_card *
2377spider_net_setup_pci_dev(struct pci_dev *pdev)
2378{
2379 struct spider_net_card *card;
2380 unsigned long mmio_start, mmio_len;
2381
2382 if (pci_enable_device(pdev)) {
2383 dev_err(&pdev->dev, "Couldn't enable PCI device\n");
2384 return NULL;
2385 }
2386
2387 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2388 dev_err(&pdev->dev,
2389 "Couldn't find proper PCI device base address.\n");
2390 goto out_disable_dev;
2391 }
2392
2393 if (pci_request_regions(pdev, spider_net_driver_name)) {
2394 dev_err(&pdev->dev,
2395 "Couldn't obtain PCI resources, aborting.\n");
2396 goto out_disable_dev;
2397 }
2398
2399 pci_set_master(pdev);
2400
2401 card = spider_net_alloc_card();
2402 if (!card) {
2403 dev_err(&pdev->dev,
2404 "Couldn't allocate net_device structure, aborting.\n");
2405 goto out_release_regions;
2406 }
2407 card->pdev = pdev;
2408
2409
2410 mmio_start = pci_resource_start(pdev, 0);
2411 mmio_len = pci_resource_len(pdev, 0);
2412
2413 card->netdev->mem_start = mmio_start;
2414 card->netdev->mem_end = mmio_start + mmio_len;
2415 card->regs = ioremap(mmio_start, mmio_len);
2416
2417 if (!card->regs) {
2418 dev_err(&pdev->dev,
2419 "Couldn't obtain PCI resources, aborting.\n");
2420 goto out_release_regions;
2421 }
2422
2423 return card;
2424
2425out_release_regions:
2426 pci_release_regions(pdev);
2427out_disable_dev:
2428 pci_disable_device(pdev);
2429 return NULL;
2430}
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442static int
2443spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2444{
2445 int err = -EIO;
2446 struct spider_net_card *card;
2447
2448 card = spider_net_setup_pci_dev(pdev);
2449 if (!card)
2450 goto out;
2451
2452 spider_net_workaround_rxramfull(card);
2453 spider_net_init_card(card);
2454
2455 err = spider_net_setup_phy(card);
2456 if (err)
2457 goto out_undo_pci;
2458
2459 err = spider_net_setup_netdev(card);
2460 if (err)
2461 goto out_undo_pci;
2462
2463 return 0;
2464
2465out_undo_pci:
2466 spider_net_undo_pci_setup(card);
2467 free_netdev(card->netdev);
2468out:
2469 return err;
2470}
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481static void
2482spider_net_remove(struct pci_dev *pdev)
2483{
2484 struct net_device *netdev;
2485 struct spider_net_card *card;
2486
2487 netdev = pci_get_drvdata(pdev);
2488 card = netdev_priv(netdev);
2489
2490 wait_event(card->waitq,
2491 atomic_read(&card->tx_timeout_task_counter) == 0);
2492
2493 unregister_netdev(netdev);
2494
2495
2496 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2497 SPIDER_NET_CKRCTRL_STOP_VALUE);
2498 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2499 SPIDER_NET_CKRCTRL_RUN_VALUE);
2500
2501 spider_net_undo_pci_setup(card);
2502 free_netdev(netdev);
2503}
2504
2505static struct pci_driver spider_net_driver = {
2506 .name = spider_net_driver_name,
2507 .id_table = spider_net_pci_tbl,
2508 .probe = spider_net_probe,
2509 .remove = spider_net_remove
2510};
2511
2512
2513
2514
2515
2516
2517static int __init spider_net_init(void)
2518{
2519 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2520
2521 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2522 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2523 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2524 }
2525 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2526 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2527 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2528 }
2529 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2530 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2531 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2532 }
2533 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2534 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2535 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2536 }
2537
2538 return pci_register_driver(&spider_net_driver);
2539}
2540
2541
2542
2543
2544
2545
2546static void __exit spider_net_cleanup(void)
2547{
2548 pci_unregister_driver(&spider_net_driver);
2549}
2550
2551module_init(spider_net_init);
2552module_exit(spider_net_cleanup);
2553