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