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-rw-r--r--drivers/net/spider_net.c578
-rw-r--r--drivers/net/spider_net.h73
2 files changed, 274 insertions, 377 deletions
diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
index 05b474f2c8b5..647f62e9707d 100644
--- a/drivers/net/spider_net.c
+++ b/drivers/net/spider_net.c
@@ -84,7 +84,7 @@ MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
84 * 84 *
85 * returns the content of the specified SMMIO register. 85 * returns the content of the specified SMMIO register.
86 */ 86 */
87static u32 87static inline u32
88spider_net_read_reg(struct spider_net_card *card, u32 reg) 88spider_net_read_reg(struct spider_net_card *card, u32 reg)
89{ 89{
90 u32 value; 90 u32 value;
@@ -101,7 +101,7 @@ spider_net_read_reg(struct spider_net_card *card, u32 reg)
101 * @reg: register to write to 101 * @reg: register to write to
102 * @value: value to write into the specified SMMIO register 102 * @value: value to write into the specified SMMIO register
103 */ 103 */
104static void 104static inline void
105spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) 105spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
106{ 106{
107 value = cpu_to_le32(value); 107 value = cpu_to_le32(value);
@@ -259,39 +259,10 @@ spider_net_get_mac_address(struct net_device *netdev)
259 * 259 *
260 * returns the status as in the dmac_cmd_status field of the descriptor 260 * returns the status as in the dmac_cmd_status field of the descriptor
261 */ 261 */
262static enum spider_net_descr_status 262static inline int
263spider_net_get_descr_status(struct spider_net_descr *descr) 263spider_net_get_descr_status(struct spider_net_descr *descr)
264{ 264{
265 u32 cmd_status; 265 return descr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
266
267 cmd_status = descr->dmac_cmd_status;
268 cmd_status >>= SPIDER_NET_DESCR_IND_PROC_SHIFT;
269 /* no need to mask out any bits, as cmd_status is 32 bits wide only
270 * (and unsigned) */
271 return cmd_status;
272}
273
274/**
275 * spider_net_set_descr_status -- sets the status of a descriptor
276 * @descr: descriptor to change
277 * @status: status to set in the descriptor
278 *
279 * changes the status to the specified value. Doesn't change other bits
280 * in the status
281 */
282static void
283spider_net_set_descr_status(struct spider_net_descr *descr,
284 enum spider_net_descr_status status)
285{
286 u32 cmd_status;
287 /* read the status */
288 cmd_status = descr->dmac_cmd_status;
289 /* clean the upper 4 bits */
290 cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO;
291 /* add the status to it */
292 cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT;
293 /* and write it back */
294 descr->dmac_cmd_status = cmd_status;
295} 266}
296 267
297/** 268/**
@@ -328,24 +299,23 @@ spider_net_free_chain(struct spider_net_card *card,
328static int 299static int
329spider_net_init_chain(struct spider_net_card *card, 300spider_net_init_chain(struct spider_net_card *card,
330 struct spider_net_descr_chain *chain, 301 struct spider_net_descr_chain *chain,
331 struct spider_net_descr *start_descr, int no) 302 struct spider_net_descr *start_descr,
303 int direction, int no)
332{ 304{
333 int i; 305 int i;
334 struct spider_net_descr *descr; 306 struct spider_net_descr *descr;
335 dma_addr_t buf; 307 dma_addr_t buf;
336 308
337 atomic_set(&card->rx_chain_refill,0);
338
339 descr = start_descr; 309 descr = start_descr;
340 memset(descr, 0, sizeof(*descr) * no); 310 memset(descr, 0, sizeof(*descr) * no);
341 311
342 /* set up the hardware pointers in each descriptor */ 312 /* set up the hardware pointers in each descriptor */
343 for (i=0; i<no; i++, descr++) { 313 for (i=0; i<no; i++, descr++) {
344 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); 314 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
345 315
346 buf = pci_map_single(card->pdev, descr, 316 buf = pci_map_single(card->pdev, descr,
347 SPIDER_NET_DESCR_SIZE, 317 SPIDER_NET_DESCR_SIZE,
348 PCI_DMA_BIDIRECTIONAL); 318 direction);
349 319
350 if (buf == DMA_ERROR_CODE) 320 if (buf == DMA_ERROR_CODE)
351 goto iommu_error; 321 goto iommu_error;
@@ -360,10 +330,11 @@ spider_net_init_chain(struct spider_net_card *card,
360 start_descr->prev = descr-1; 330 start_descr->prev = descr-1;
361 331
362 descr = start_descr; 332 descr = start_descr;
363 for (i=0; i < no; i++, descr++) { 333 if (direction == PCI_DMA_FROMDEVICE)
364 descr->next_descr_addr = descr->next->bus_addr; 334 for (i=0; i < no; i++, descr++)
365 } 335 descr->next_descr_addr = descr->next->bus_addr;
366 336
337 spin_lock_init(&chain->lock);
367 chain->head = start_descr; 338 chain->head = start_descr;
368 chain->tail = start_descr; 339 chain->tail = start_descr;
369 340
@@ -375,7 +346,7 @@ iommu_error:
375 if (descr->bus_addr) 346 if (descr->bus_addr)
376 pci_unmap_single(card->pdev, descr->bus_addr, 347 pci_unmap_single(card->pdev, descr->bus_addr,
377 SPIDER_NET_DESCR_SIZE, 348 SPIDER_NET_DESCR_SIZE,
378 PCI_DMA_BIDIRECTIONAL); 349 direction);
379 return -ENOMEM; 350 return -ENOMEM;
380} 351}
381 352
@@ -396,7 +367,7 @@ spider_net_free_rx_chain_contents(struct spider_net_card *card)
396 dev_kfree_skb(descr->skb); 367 dev_kfree_skb(descr->skb);
397 pci_unmap_single(card->pdev, descr->buf_addr, 368 pci_unmap_single(card->pdev, descr->buf_addr,
398 SPIDER_NET_MAX_FRAME, 369 SPIDER_NET_MAX_FRAME,
399 PCI_DMA_BIDIRECTIONAL); 370 PCI_DMA_FROMDEVICE);
400 } 371 }
401 descr = descr->next; 372 descr = descr->next;
402 } 373 }
@@ -446,15 +417,16 @@ spider_net_prepare_rx_descr(struct spider_net_card *card,
446 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); 417 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
447 /* io-mmu-map the skb */ 418 /* io-mmu-map the skb */
448 buf = pci_map_single(card->pdev, descr->skb->data, 419 buf = pci_map_single(card->pdev, descr->skb->data,
449 SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL); 420 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
450 descr->buf_addr = buf; 421 descr->buf_addr = buf;
451 if (buf == DMA_ERROR_CODE) { 422 if (buf == DMA_ERROR_CODE) {
452 dev_kfree_skb_any(descr->skb); 423 dev_kfree_skb_any(descr->skb);
453 if (netif_msg_rx_err(card) && net_ratelimit()) 424 if (netif_msg_rx_err(card) && net_ratelimit())
454 pr_err("Could not iommu-map rx buffer\n"); 425 pr_err("Could not iommu-map rx buffer\n");
455 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); 426 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
456 } else { 427 } else {
457 descr->dmac_cmd_status = SPIDER_NET_DMAC_RX_CARDOWNED; 428 descr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
429 SPIDER_NET_DMAC_NOINTR_COMPLETE;
458 } 430 }
459 431
460 return error; 432 return error;
@@ -468,7 +440,7 @@ spider_net_prepare_rx_descr(struct spider_net_card *card,
468 * chip by writing to the appropriate register. DMA is enabled in 440 * chip by writing to the appropriate register. DMA is enabled in
469 * spider_net_enable_rxdmac. 441 * spider_net_enable_rxdmac.
470 */ 442 */
471static void 443static inline void
472spider_net_enable_rxchtails(struct spider_net_card *card) 444spider_net_enable_rxchtails(struct spider_net_card *card)
473{ 445{
474 /* assume chain is aligned correctly */ 446 /* assume chain is aligned correctly */
@@ -483,7 +455,7 @@ spider_net_enable_rxchtails(struct spider_net_card *card)
483 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN 455 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
484 * in the GDADMACCNTR register 456 * in the GDADMACCNTR register
485 */ 457 */
486static void 458static inline void
487spider_net_enable_rxdmac(struct spider_net_card *card) 459spider_net_enable_rxdmac(struct spider_net_card *card)
488{ 460{
489 wmb(); 461 wmb();
@@ -500,23 +472,24 @@ spider_net_enable_rxdmac(struct spider_net_card *card)
500static void 472static void
501spider_net_refill_rx_chain(struct spider_net_card *card) 473spider_net_refill_rx_chain(struct spider_net_card *card)
502{ 474{
503 struct spider_net_descr_chain *chain; 475 struct spider_net_descr_chain *chain = &card->rx_chain;
504 476 unsigned long flags;
505 chain = &card->rx_chain;
506 477
507 /* one context doing the refill (and a second context seeing that 478 /* one context doing the refill (and a second context seeing that
508 * and omitting it) is ok. If called by NAPI, we'll be called again 479 * and omitting it) is ok. If called by NAPI, we'll be called again
509 * as spider_net_decode_one_descr is called several times. If some 480 * as spider_net_decode_one_descr is called several times. If some
510 * interrupt calls us, the NAPI is about to clean up anyway. */ 481 * interrupt calls us, the NAPI is about to clean up anyway. */
511 if (atomic_inc_return(&card->rx_chain_refill) == 1) 482 if (!spin_trylock_irqsave(&chain->lock, flags))
512 while (spider_net_get_descr_status(chain->head) == 483 return;
513 SPIDER_NET_DESCR_NOT_IN_USE) { 484
514 if (spider_net_prepare_rx_descr(card, chain->head)) 485 while (spider_net_get_descr_status(chain->head) ==
515 break; 486 SPIDER_NET_DESCR_NOT_IN_USE) {
516 chain->head = chain->head->next; 487 if (spider_net_prepare_rx_descr(card, chain->head))
517 } 488 break;
489 chain->head = chain->head->next;
490 }
518 491
519 atomic_dec(&card->rx_chain_refill); 492 spin_unlock_irqrestore(&chain->lock, flags);
520} 493}
521 494
522/** 495/**
@@ -554,111 +527,6 @@ error:
554} 527}
555 528
556/** 529/**
557 * spider_net_release_tx_descr - processes a used tx descriptor
558 * @card: card structure
559 * @descr: descriptor to release
560 *
561 * releases a used tx descriptor (unmapping, freeing of skb)
562 */
563static void
564spider_net_release_tx_descr(struct spider_net_card *card,
565 struct spider_net_descr *descr)
566{
567 struct sk_buff *skb;
568
569 /* unmap the skb */
570 skb = descr->skb;
571 pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
572 PCI_DMA_BIDIRECTIONAL);
573
574 dev_kfree_skb_any(skb);
575
576 /* set status to not used */
577 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
578}
579
580/**
581 * spider_net_release_tx_chain - processes sent tx descriptors
582 * @card: adapter structure
583 * @brutal: if set, don't care about whether descriptor seems to be in use
584 *
585 * returns 0 if the tx ring is empty, otherwise 1.
586 *
587 * spider_net_release_tx_chain releases the tx descriptors that spider has
588 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
589 * If some other context is calling this function, we return 1 so that we're
590 * scheduled again (if we were scheduled) and will not loose initiative.
591 */
592static int
593spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
594{
595 struct spider_net_descr_chain *tx_chain = &card->tx_chain;
596 enum spider_net_descr_status status;
597
598 if (atomic_inc_return(&card->tx_chain_release) != 1) {
599 atomic_dec(&card->tx_chain_release);
600 return 1;
601 }
602
603 for (;;) {
604 status = spider_net_get_descr_status(tx_chain->tail);
605 switch (status) {
606 case SPIDER_NET_DESCR_CARDOWNED:
607 if (!brutal)
608 goto out;
609 /* fallthrough, if we release the descriptors
610 * brutally (then we don't care about
611 * SPIDER_NET_DESCR_CARDOWNED) */
612 case SPIDER_NET_DESCR_RESPONSE_ERROR:
613 case SPIDER_NET_DESCR_PROTECTION_ERROR:
614 case SPIDER_NET_DESCR_FORCE_END:
615 if (netif_msg_tx_err(card))
616 pr_err("%s: forcing end of tx descriptor "
617 "with status x%02x\n",
618 card->netdev->name, status);
619 card->netdev_stats.tx_dropped++;
620 break;
621
622 case SPIDER_NET_DESCR_COMPLETE:
623 card->netdev_stats.tx_packets++;
624 card->netdev_stats.tx_bytes +=
625 tx_chain->tail->skb->len;
626 break;
627
628 default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */
629 goto out;
630 }
631 spider_net_release_tx_descr(card, tx_chain->tail);
632 tx_chain->tail = tx_chain->tail->next;
633 }
634out:
635 atomic_dec(&card->tx_chain_release);
636
637 netif_wake_queue(card->netdev);
638
639 if (status == SPIDER_NET_DESCR_CARDOWNED)
640 return 1;
641 return 0;
642}
643
644/**
645 * spider_net_cleanup_tx_ring - cleans up the TX ring
646 * @card: card structure
647 *
648 * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
649 * interrupts to cleanup our TX ring) and returns sent packets to the stack
650 * by freeing them
651 */
652static void
653spider_net_cleanup_tx_ring(struct spider_net_card *card)
654{
655 if ( (spider_net_release_tx_chain(card, 0)) &&
656 (card->netdev->flags & IFF_UP) ) {
657 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
658 }
659}
660
661/**
662 * spider_net_get_multicast_hash - generates hash for multicast filter table 530 * spider_net_get_multicast_hash - generates hash for multicast filter table
663 * @addr: multicast address 531 * @addr: multicast address
664 * 532 *
@@ -761,97 +629,6 @@ spider_net_disable_rxdmac(struct spider_net_card *card)
761} 629}
762 630
763/** 631/**
764 * spider_net_stop - called upon ifconfig down
765 * @netdev: interface device structure
766 *
767 * always returns 0
768 */
769int
770spider_net_stop(struct net_device *netdev)
771{
772 struct spider_net_card *card = netdev_priv(netdev);
773
774 tasklet_kill(&card->rxram_full_tl);
775 netif_poll_disable(netdev);
776 netif_carrier_off(netdev);
777 netif_stop_queue(netdev);
778 del_timer_sync(&card->tx_timer);
779
780 /* disable/mask all interrupts */
781 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
782 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
783 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
784
785 /* free_irq(netdev->irq, netdev);*/
786 free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
787
788 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
789 SPIDER_NET_DMA_TX_FEND_VALUE);
790
791 /* turn off DMA, force end */
792 spider_net_disable_rxdmac(card);
793
794 /* release chains */
795 spider_net_release_tx_chain(card, 1);
796
797 spider_net_free_chain(card, &card->tx_chain);
798 spider_net_free_chain(card, &card->rx_chain);
799
800 return 0;
801}
802
803/**
804 * spider_net_get_next_tx_descr - returns the next available tx descriptor
805 * @card: device structure to get descriptor from
806 *
807 * returns the address of the next descriptor, or NULL if not available.
808 */
809static struct spider_net_descr *
810spider_net_get_next_tx_descr(struct spider_net_card *card)
811{
812 /* check, if head points to not-in-use descr */
813 if ( spider_net_get_descr_status(card->tx_chain.head) ==
814 SPIDER_NET_DESCR_NOT_IN_USE ) {
815 return card->tx_chain.head;
816 } else {
817 return NULL;
818 }
819}
820
821/**
822 * spider_net_set_txdescr_cmdstat - sets the tx descriptor command field
823 * @descr: descriptor structure to fill out
824 * @skb: packet to consider
825 *
826 * fills out the command and status field of the descriptor structure,
827 * depending on hardware checksum settings.
828 */
829static void
830spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr,
831 struct sk_buff *skb)
832{
833 /* make sure the other fields in the descriptor are written */
834 wmb();
835
836 if (skb->ip_summed != CHECKSUM_HW) {
837 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
838 return;
839 }
840
841 /* is packet ip?
842 * if yes: tcp? udp? */
843 if (skb->protocol == htons(ETH_P_IP)) {
844 if (skb->nh.iph->protocol == IPPROTO_TCP)
845 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS;
846 else if (skb->nh.iph->protocol == IPPROTO_UDP)
847 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_UDPCS;
848 else /* the stack should checksum non-tcp and non-udp
849 packets on his own: NETIF_F_IP_CSUM */
850 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
851 }
852}
853
854/**
855 * spider_net_prepare_tx_descr - fill tx descriptor with skb data 632 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
856 * @card: card structure 633 * @card: card structure
857 * @descr: descriptor structure to fill out 634 * @descr: descriptor structure to fill out
@@ -864,13 +641,12 @@ spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr,
864 */ 641 */
865static int 642static int
866spider_net_prepare_tx_descr(struct spider_net_card *card, 643spider_net_prepare_tx_descr(struct spider_net_card *card,
867 struct spider_net_descr *descr,
868 struct sk_buff *skb) 644 struct sk_buff *skb)
869{ 645{
646 struct spider_net_descr *descr = card->tx_chain.head;
870 dma_addr_t buf; 647 dma_addr_t buf;
871 648
872 buf = pci_map_single(card->pdev, skb->data, 649 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
873 skb->len, PCI_DMA_BIDIRECTIONAL);
874 if (buf == DMA_ERROR_CODE) { 650 if (buf == DMA_ERROR_CODE) {
875 if (netif_msg_tx_err(card) && net_ratelimit()) 651 if (netif_msg_tx_err(card) && net_ratelimit())
876 pr_err("could not iommu-map packet (%p, %i). " 652 pr_err("could not iommu-map packet (%p, %i). "
@@ -880,10 +656,101 @@ spider_net_prepare_tx_descr(struct spider_net_card *card,
880 656
881 descr->buf_addr = buf; 657 descr->buf_addr = buf;
882 descr->buf_size = skb->len; 658 descr->buf_size = skb->len;
659 descr->next_descr_addr = 0;
883 descr->skb = skb; 660 descr->skb = skb;
884 descr->data_status = 0; 661 descr->data_status = 0;
885 662
886 spider_net_set_txdescr_cmdstat(descr,skb); 663 descr->dmac_cmd_status =
664 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
665 if (skb->protocol == htons(ETH_P_IP))
666 switch (skb->nh.iph->protocol) {
667 case IPPROTO_TCP:
668 descr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
669 break;
670 case IPPROTO_UDP:
671 descr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
672 break;
673 }
674
675 descr->prev->next_descr_addr = descr->bus_addr;
676
677 return 0;
678}
679
680/**
681 * spider_net_release_tx_descr - processes a used tx descriptor
682 * @card: card structure
683 * @descr: descriptor to release
684 *
685 * releases a used tx descriptor (unmapping, freeing of skb)
686 */
687static inline void
688spider_net_release_tx_descr(struct spider_net_card *card)
689{
690 struct spider_net_descr *descr = card->tx_chain.tail;
691 struct sk_buff *skb;
692
693 card->tx_chain.tail = card->tx_chain.tail->next;
694 descr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
695
696 /* unmap the skb */
697 skb = descr->skb;
698 pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
699 PCI_DMA_TODEVICE);
700 dev_kfree_skb_any(skb);
701}
702
703/**
704 * spider_net_release_tx_chain - processes sent tx descriptors
705 * @card: adapter structure
706 * @brutal: if set, don't care about whether descriptor seems to be in use
707 *
708 * returns 0 if the tx ring is empty, otherwise 1.
709 *
710 * spider_net_release_tx_chain releases the tx descriptors that spider has
711 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
712 * If some other context is calling this function, we return 1 so that we're
713 * scheduled again (if we were scheduled) and will not loose initiative.
714 */
715static int
716spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
717{
718 struct spider_net_descr_chain *chain = &card->tx_chain;
719 int status;
720
721 spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR);
722
723 while (chain->tail != chain->head) {
724 status = spider_net_get_descr_status(chain->tail);
725 switch (status) {
726 case SPIDER_NET_DESCR_COMPLETE:
727 card->netdev_stats.tx_packets++;
728 card->netdev_stats.tx_bytes += chain->tail->skb->len;
729 break;
730
731 case SPIDER_NET_DESCR_CARDOWNED:
732 if (!brutal)
733 return 1;
734 /* fallthrough, if we release the descriptors
735 * brutally (then we don't care about
736 * SPIDER_NET_DESCR_CARDOWNED) */
737
738 case SPIDER_NET_DESCR_RESPONSE_ERROR:
739 case SPIDER_NET_DESCR_PROTECTION_ERROR:
740 case SPIDER_NET_DESCR_FORCE_END:
741 if (netif_msg_tx_err(card))
742 pr_err("%s: forcing end of tx descriptor "
743 "with status x%02x\n",
744 card->netdev->name, status);
745 card->netdev_stats.tx_errors++;
746 break;
747
748 default:
749 card->netdev_stats.tx_dropped++;
750 return 1;
751 }
752 spider_net_release_tx_descr(card);
753 }
887 754
888 return 0; 755 return 0;
889} 756}
@@ -896,18 +763,32 @@ spider_net_prepare_tx_descr(struct spider_net_card *card,
896 * spider_net_kick_tx_dma writes the current tx chain head as start address 763 * spider_net_kick_tx_dma writes the current tx chain head as start address
897 * of the tx descriptor chain and enables the transmission DMA engine 764 * of the tx descriptor chain and enables the transmission DMA engine
898 */ 765 */
899static void 766static inline void
900spider_net_kick_tx_dma(struct spider_net_card *card, 767spider_net_kick_tx_dma(struct spider_net_card *card)
901 struct spider_net_descr *descr)
902{ 768{
903 /* this is the only descriptor in the output chain. 769 struct spider_net_descr *descr;
904 * Enable TX DMA */
905 770
906 spider_net_write_reg(card, SPIDER_NET_GDTDCHA, 771 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
907 descr->bus_addr); 772 SPIDER_NET_TX_DMA_EN)
773 goto out;
908 774
909 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, 775 descr = card->tx_chain.tail;
910 SPIDER_NET_DMA_TX_VALUE); 776 for (;;) {
777 if (spider_net_get_descr_status(descr) ==
778 SPIDER_NET_DESCR_CARDOWNED) {
779 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
780 descr->bus_addr);
781 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
782 SPIDER_NET_DMA_TX_VALUE);
783 break;
784 }
785 if (descr == card->tx_chain.head)
786 break;
787 descr = descr->next;
788 }
789
790out:
791 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
911} 792}
912 793
913/** 794/**
@@ -915,47 +796,69 @@ spider_net_kick_tx_dma(struct spider_net_card *card,
915 * @skb: packet to send out 796 * @skb: packet to send out
916 * @netdev: interface device structure 797 * @netdev: interface device structure
917 * 798 *
918 * returns 0 on success, <0 on failure 799 * returns 0 on success, !0 on failure
919 */ 800 */
920static int 801static int
921spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) 802spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
922{ 803{
923 struct spider_net_card *card = netdev_priv(netdev); 804 struct spider_net_card *card = netdev_priv(netdev);
924 struct spider_net_descr *descr; 805 struct spider_net_descr_chain *chain = &card->tx_chain;
806 struct spider_net_descr *descr = chain->head;
807 unsigned long flags;
925 int result; 808 int result;
926 809
810 spin_lock_irqsave(&chain->lock, flags);
811
927 spider_net_release_tx_chain(card, 0); 812 spider_net_release_tx_chain(card, 0);
928 813
929 descr = spider_net_get_next_tx_descr(card); 814 if (chain->head->next == chain->tail->prev) {
815 card->netdev_stats.tx_dropped++;
816 result = NETDEV_TX_LOCKED;
817 goto out;
818 }
930 819
931 if (!descr) 820 if (spider_net_get_descr_status(descr) != SPIDER_NET_DESCR_NOT_IN_USE) {
932 goto error; 821 result = NETDEV_TX_LOCKED;
822 goto out;
823 }
933 824
934 result = spider_net_prepare_tx_descr(card, descr, skb); 825 if (spider_net_prepare_tx_descr(card, skb) != 0) {
935 if (result) 826 card->netdev_stats.tx_dropped++;
936 goto error; 827 result = NETDEV_TX_BUSY;
828 goto out;
829 }
830
831 result = NETDEV_TX_OK;
937 832
833 spider_net_kick_tx_dma(card);
938 card->tx_chain.head = card->tx_chain.head->next; 834 card->tx_chain.head = card->tx_chain.head->next;
939 835
940 if (spider_net_get_descr_status(descr->prev) != 836out:
941 SPIDER_NET_DESCR_CARDOWNED) { 837 spin_unlock_irqrestore(&chain->lock, flags);
942 /* make sure the current descriptor is in memory. Then 838 netif_wake_queue(netdev);
943 * kicking it on again makes sense, if the previous is not 839 return result;
944 * card-owned anymore. Check the previous descriptor twice 840}
945 * to omit an mb() in heavy traffic cases */
946 mb();
947 if (spider_net_get_descr_status(descr->prev) !=
948 SPIDER_NET_DESCR_CARDOWNED)
949 spider_net_kick_tx_dma(card, descr);
950 }
951 841
952 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); 842/**
843 * spider_net_cleanup_tx_ring - cleans up the TX ring
844 * @card: card structure
845 *
846 * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
847 * interrupts to cleanup our TX ring) and returns sent packets to the stack
848 * by freeing them
849 */
850static void
851spider_net_cleanup_tx_ring(struct spider_net_card *card)
852{
853 unsigned long flags;
953 854
954 return NETDEV_TX_OK; 855 spin_lock_irqsave(&card->tx_chain.lock, flags);
955 856
956error: 857 if ((spider_net_release_tx_chain(card, 0) != 0) &&
957 card->netdev_stats.tx_dropped++; 858 (card->netdev->flags & IFF_UP))
958 return NETDEV_TX_BUSY; 859 spider_net_kick_tx_dma(card);
860
861 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
959} 862}
960 863
961/** 864/**
@@ -1002,7 +905,7 @@ spider_net_pass_skb_up(struct spider_net_descr *descr,
1002 905
1003 /* unmap descriptor */ 906 /* unmap descriptor */
1004 pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME, 907 pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME,
1005 PCI_DMA_BIDIRECTIONAL); 908 PCI_DMA_FROMDEVICE);
1006 909
1007 /* the cases we'll throw away the packet immediately */ 910 /* the cases we'll throw away the packet immediately */
1008 if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) { 911 if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
@@ -1067,14 +970,11 @@ spider_net_pass_skb_up(struct spider_net_descr *descr,
1067static int 970static int
1068spider_net_decode_one_descr(struct spider_net_card *card, int napi) 971spider_net_decode_one_descr(struct spider_net_card *card, int napi)
1069{ 972{
1070 enum spider_net_descr_status status; 973 struct spider_net_descr_chain *chain = &card->rx_chain;
1071 struct spider_net_descr *descr; 974 struct spider_net_descr *descr = chain->tail;
1072 struct spider_net_descr_chain *chain; 975 int status;
1073 int result; 976 int result;
1074 977
1075 chain = &card->rx_chain;
1076 descr = chain->tail;
1077
1078 status = spider_net_get_descr_status(descr); 978 status = spider_net_get_descr_status(descr);
1079 979
1080 if (status == SPIDER_NET_DESCR_CARDOWNED) { 980 if (status == SPIDER_NET_DESCR_CARDOWNED) {
@@ -1103,7 +1003,7 @@ spider_net_decode_one_descr(struct spider_net_card *card, int napi)
1103 card->netdev->name, status); 1003 card->netdev->name, status);
1104 card->netdev_stats.rx_dropped++; 1004 card->netdev_stats.rx_dropped++;
1105 pci_unmap_single(card->pdev, descr->buf_addr, 1005 pci_unmap_single(card->pdev, descr->buf_addr,
1106 SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL); 1006 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1107 dev_kfree_skb_irq(descr->skb); 1007 dev_kfree_skb_irq(descr->skb);
1108 goto refill; 1008 goto refill;
1109 } 1009 }
@@ -1119,7 +1019,7 @@ spider_net_decode_one_descr(struct spider_net_card *card, int napi)
1119 /* ok, we've got a packet in descr */ 1019 /* ok, we've got a packet in descr */
1120 result = spider_net_pass_skb_up(descr, card, napi); 1020 result = spider_net_pass_skb_up(descr, card, napi);
1121refill: 1021refill:
1122 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); 1022 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1123 /* change the descriptor state: */ 1023 /* change the descriptor state: */
1124 if (!napi) 1024 if (!napi)
1125 spider_net_refill_rx_chain(card); 1025 spider_net_refill_rx_chain(card);
@@ -1291,21 +1191,6 @@ spider_net_set_mac(struct net_device *netdev, void *p)
1291} 1191}
1292 1192
1293/** 1193/**
1294 * spider_net_enable_txdmac - enables a TX DMA controller
1295 * @card: card structure
1296 *
1297 * spider_net_enable_txdmac enables the TX DMA controller by setting the
1298 * descriptor chain tail address
1299 */
1300static void
1301spider_net_enable_txdmac(struct spider_net_card *card)
1302{
1303 /* assume chain is aligned correctly */
1304 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
1305 card->tx_chain.tail->bus_addr);
1306}
1307
1308/**
1309 * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt 1194 * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt
1310 * @card: card structure 1195 * @card: card structure
1311 * 1196 *
@@ -1653,7 +1538,6 @@ spider_net_enable_card(struct spider_net_card *card)
1653 { SPIDER_NET_GMRWOLCTRL, 0 }, 1538 { SPIDER_NET_GMRWOLCTRL, 0 },
1654 { SPIDER_NET_GTESTMD, 0x10000000 }, 1539 { SPIDER_NET_GTESTMD, 0x10000000 },
1655 { SPIDER_NET_GTTQMSK, 0x00400040 }, 1540 { SPIDER_NET_GTTQMSK, 0x00400040 },
1656 { SPIDER_NET_GTESTMD, 0 },
1657 1541
1658 { SPIDER_NET_GMACINTEN, 0 }, 1542 { SPIDER_NET_GMACINTEN, 0 },
1659 1543
@@ -1692,9 +1576,6 @@ spider_net_enable_card(struct spider_net_card *card)
1692 1576
1693 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); 1577 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1694 1578
1695 /* set chain tail adress for TX chain */
1696 spider_net_enable_txdmac(card);
1697
1698 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, 1579 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1699 SPIDER_NET_LENLMT_VALUE); 1580 SPIDER_NET_LENLMT_VALUE);
1700 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 1581 spider_net_write_reg(card, SPIDER_NET_GMACMODE,
@@ -1709,6 +1590,9 @@ spider_net_enable_card(struct spider_net_card *card)
1709 SPIDER_NET_INT1_MASK_VALUE); 1590 SPIDER_NET_INT1_MASK_VALUE);
1710 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 1591 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1711 SPIDER_NET_INT2_MASK_VALUE); 1592 SPIDER_NET_INT2_MASK_VALUE);
1593
1594 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1595 SPIDER_NET_GDTDCEIDIS);
1712} 1596}
1713 1597
1714/** 1598/**
@@ -1728,10 +1612,12 @@ spider_net_open(struct net_device *netdev)
1728 1612
1729 result = -ENOMEM; 1613 result = -ENOMEM;
1730 if (spider_net_init_chain(card, &card->tx_chain, 1614 if (spider_net_init_chain(card, &card->tx_chain,
1731 card->descr, tx_descriptors)) 1615 card->descr,
1616 PCI_DMA_TODEVICE, tx_descriptors))
1732 goto alloc_tx_failed; 1617 goto alloc_tx_failed;
1733 if (spider_net_init_chain(card, &card->rx_chain, 1618 if (spider_net_init_chain(card, &card->rx_chain,
1734 card->descr + tx_descriptors, rx_descriptors)) 1619 card->descr + tx_descriptors,
1620 PCI_DMA_FROMDEVICE, rx_descriptors))
1735 goto alloc_rx_failed; 1621 goto alloc_rx_failed;
1736 1622
1737 /* allocate rx skbs */ 1623 /* allocate rx skbs */
@@ -1955,6 +1841,49 @@ spider_net_workaround_rxramfull(struct spider_net_card *card)
1955} 1841}
1956 1842
1957/** 1843/**
1844 * spider_net_stop - called upon ifconfig down
1845 * @netdev: interface device structure
1846 *
1847 * always returns 0
1848 */
1849int
1850spider_net_stop(struct net_device *netdev)
1851{
1852 struct spider_net_card *card = netdev_priv(netdev);
1853
1854 tasklet_kill(&card->rxram_full_tl);
1855 netif_poll_disable(netdev);
1856 netif_carrier_off(netdev);
1857 netif_stop_queue(netdev);
1858 del_timer_sync(&card->tx_timer);
1859
1860 /* disable/mask all interrupts */
1861 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1862 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1863 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1864
1865 /* free_irq(netdev->irq, netdev);*/
1866 free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
1867
1868 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1869 SPIDER_NET_DMA_TX_FEND_VALUE);
1870
1871 /* turn off DMA, force end */
1872 spider_net_disable_rxdmac(card);
1873
1874 /* release chains */
1875 if (spin_trylock(&card->tx_chain.lock)) {
1876 spider_net_release_tx_chain(card, 1);
1877 spin_unlock(&card->tx_chain.lock);
1878 }
1879
1880 spider_net_free_chain(card, &card->tx_chain);
1881 spider_net_free_chain(card, &card->rx_chain);
1882
1883 return 0;
1884}
1885
1886/**
1958 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout 1887 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1959 * function (to be called not under interrupt status) 1888 * function (to be called not under interrupt status)
1960 * @data: data, is interface device structure 1889 * @data: data, is interface device structure
@@ -1982,7 +1911,7 @@ spider_net_tx_timeout_task(void *data)
1982 goto out; 1911 goto out;
1983 1912
1984 spider_net_open(netdev); 1913 spider_net_open(netdev);
1985 spider_net_kick_tx_dma(card, card->tx_chain.head); 1914 spider_net_kick_tx_dma(card);
1986 netif_device_attach(netdev); 1915 netif_device_attach(netdev);
1987 1916
1988out: 1917out:
@@ -2065,7 +1994,6 @@ spider_net_setup_netdev(struct spider_net_card *card)
2065 1994
2066 pci_set_drvdata(card->pdev, netdev); 1995 pci_set_drvdata(card->pdev, netdev);
2067 1996
2068 atomic_set(&card->tx_chain_release,0);
2069 card->rxram_full_tl.data = (unsigned long) card; 1997 card->rxram_full_tl.data = (unsigned long) card;
2070 card->rxram_full_tl.func = 1998 card->rxram_full_tl.func =
2071 (void (*)(unsigned long)) spider_net_handle_rxram_full; 1999 (void (*)(unsigned long)) spider_net_handle_rxram_full;
@@ -2079,7 +2007,7 @@ spider_net_setup_netdev(struct spider_net_card *card)
2079 2007
2080 spider_net_setup_netdev_ops(netdev); 2008 spider_net_setup_netdev_ops(netdev);
2081 2009
2082 netdev->features = NETIF_F_HW_CSUM; 2010 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
2083 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | 2011 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2084 * NETIF_F_HW_VLAN_FILTER */ 2012 * NETIF_F_HW_VLAN_FILTER */
2085 2013
diff --git a/drivers/net/spider_net.h b/drivers/net/spider_net.h
index 3b8d951cf73c..f6dcf180ae3d 100644
--- a/drivers/net/spider_net.h
+++ b/drivers/net/spider_net.h
@@ -208,7 +208,10 @@ extern char spider_net_driver_name[];
208#define SPIDER_NET_DMA_RX_VALUE 0x80000000 208#define SPIDER_NET_DMA_RX_VALUE 0x80000000
209#define SPIDER_NET_DMA_RX_FEND_VALUE 0x00030003 209#define SPIDER_NET_DMA_RX_FEND_VALUE 0x00030003
210/* to set TX_DMA_EN */ 210/* to set TX_DMA_EN */
211#define SPIDER_NET_DMA_TX_VALUE 0x80000000 211#define SPIDER_NET_TX_DMA_EN 0x80000000
212#define SPIDER_NET_GDTDCEIDIS 0x00000002
213#define SPIDER_NET_DMA_TX_VALUE SPIDER_NET_TX_DMA_EN | \
214 SPIDER_NET_GDTDCEIDIS
212#define SPIDER_NET_DMA_TX_FEND_VALUE 0x00030003 215#define SPIDER_NET_DMA_TX_FEND_VALUE 0x00030003
213 216
214/* SPIDER_NET_UA_DESCR_VALUE is OR'ed with the unicast address */ 217/* SPIDER_NET_UA_DESCR_VALUE is OR'ed with the unicast address */
@@ -329,55 +332,23 @@ enum spider_net_int2_status {
329 (~SPIDER_NET_TXINT) & \ 332 (~SPIDER_NET_TXINT) & \
330 (~SPIDER_NET_RXINT) ) 333 (~SPIDER_NET_RXINT) )
331 334
332#define SPIDER_NET_GPREXEC 0x80000000 335#define SPIDER_NET_GPREXEC 0x80000000
333#define SPIDER_NET_GPRDAT_MASK 0x0000ffff 336#define SPIDER_NET_GPRDAT_MASK 0x0000ffff
334 337
335/* descriptor bits 338#define SPIDER_NET_DMAC_NOINTR_COMPLETE 0x00800000
336 * 339#define SPIDER_NET_DMAC_NOCS 0x00040000
337 * 1010 descriptor ready 340#define SPIDER_NET_DMAC_TCP 0x00020000
338 * 0 descr in middle of chain 341#define SPIDER_NET_DMAC_UDP 0x00030000
339 * 000 fixed to 0 342#define SPIDER_NET_TXDCEST 0x08000000
340 * 343
341 * 0 no interrupt on completion 344#define SPIDER_NET_DESCR_IND_PROC_MASK 0xF0000000
342 * 000 fixed to 0 345#define SPIDER_NET_DESCR_COMPLETE 0x00000000 /* used in rx and tx */
343 * 1 no ipsec processing 346#define SPIDER_NET_DESCR_RESPONSE_ERROR 0x10000000 /* used in rx and tx */
344 * 1 last descriptor for this frame 347#define SPIDER_NET_DESCR_PROTECTION_ERROR 0x20000000 /* used in rx and tx */
345 * 00 no checksum 348#define SPIDER_NET_DESCR_FRAME_END 0x40000000 /* used in rx */
346 * 10 tcp checksum 349#define SPIDER_NET_DESCR_FORCE_END 0x50000000 /* used in rx and tx */
347 * 11 udp checksum 350#define SPIDER_NET_DESCR_CARDOWNED 0xA0000000 /* used in rx and tx */
348 * 351#define SPIDER_NET_DESCR_NOT_IN_USE 0xF0000000
349 * 00 fixed to 0
350 * 0 fixed to 0
351 * 0 no interrupt on response errors
352 * 0 no interrupt on invalid descr
353 * 0 no interrupt on dma process termination
354 * 0 no interrupt on descr chain end
355 * 0 no interrupt on descr complete
356 *
357 * 000 fixed to 0
358 * 0 response error interrupt status
359 * 0 invalid descr status
360 * 0 dma termination status
361 * 0 descr chain end status
362 * 0 descr complete status */
363#define SPIDER_NET_DMAC_CMDSTAT_NOCS 0xa00c0000
364#define SPIDER_NET_DMAC_CMDSTAT_TCPCS 0xa00e0000
365#define SPIDER_NET_DMAC_CMDSTAT_UDPCS 0xa00f0000
366#define SPIDER_NET_DESCR_IND_PROC_SHIFT 28
367#define SPIDER_NET_DESCR_IND_PROC_MASKO 0x0fffffff
368
369/* descr ready, descr is in middle of chain, get interrupt on completion */
370#define SPIDER_NET_DMAC_RX_CARDOWNED 0xa0800000
371
372enum spider_net_descr_status {
373 SPIDER_NET_DESCR_COMPLETE = 0x00, /* used in rx and tx */
374 SPIDER_NET_DESCR_RESPONSE_ERROR = 0x01, /* used in rx and tx */
375 SPIDER_NET_DESCR_PROTECTION_ERROR = 0x02, /* used in rx and tx */
376 SPIDER_NET_DESCR_FRAME_END = 0x04, /* used in rx */
377 SPIDER_NET_DESCR_FORCE_END = 0x05, /* used in rx and tx */
378 SPIDER_NET_DESCR_CARDOWNED = 0x0a, /* used in rx and tx */
379 SPIDER_NET_DESCR_NOT_IN_USE /* any other value */
380};
381 352
382struct spider_net_descr { 353struct spider_net_descr {
383 /* as defined by the hardware */ 354 /* as defined by the hardware */
@@ -398,7 +369,7 @@ struct spider_net_descr {
398} __attribute__((aligned(32))); 369} __attribute__((aligned(32)));
399 370
400struct spider_net_descr_chain { 371struct spider_net_descr_chain {
401 /* we walk from tail to head */ 372 spinlock_t lock;
402 struct spider_net_descr *head; 373 struct spider_net_descr *head;
403 struct spider_net_descr *tail; 374 struct spider_net_descr *tail;
404}; 375};
@@ -453,8 +424,6 @@ struct spider_net_card {
453 424
454 struct spider_net_descr_chain tx_chain; 425 struct spider_net_descr_chain tx_chain;
455 struct spider_net_descr_chain rx_chain; 426 struct spider_net_descr_chain rx_chain;
456 atomic_t rx_chain_refill;
457 atomic_t tx_chain_release;
458 427
459 struct net_device_stats netdev_stats; 428 struct net_device_stats netdev_stats;
460 429
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 22:00:05 -0500