1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Network device driver for Cell Processor-Based Blade and Celleb platform
5 * (C) Copyright IBM Corp. 2005
6 * (C) Copyright 2006 TOSHIBA CORPORATION
8 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
9 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
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>
20 #include <linux/init.h>
21 #include <linux/interrupt.h>
22 #include <linux/gfp.h>
23 #include <linux/ioport.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>
40 #include "spider_net.h"
42 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
43 "<Jens.Osterkamp@de.ibm.com>");
44 MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
45 MODULE_LICENSE("GPL");
46 MODULE_VERSION(VERSION);
47 MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME);
49 static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
50 static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
52 module_param(rx_descriptors, int, 0444);
53 module_param(tx_descriptors, int, 0444);
55 MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
57 MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
60 char spider_net_driver_name[] = "spidernet";
62 static 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 },
68 MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
71 * spider_net_read_reg - reads an SMMIO register of a card
72 * @card: device structure
73 * @reg: register to read from
75 * returns the content of the specified SMMIO register.
78 spider_net_read_reg(struct spider_net_card *card, u32 reg)
80 /* We use the powerpc specific variants instead of readl_be() because
81 * we know spidernet is not a real PCI device and we can thus avoid the
82 * performance hit caused by the PCI workarounds.
84 return in_be32(card->regs + reg);
88 * spider_net_write_reg - writes to an SMMIO register of a card
89 * @card: device structure
90 * @reg: register to write to
91 * @value: value to write into the specified SMMIO register
94 spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
96 /* We use the powerpc specific variants instead of writel_be() because
97 * we know spidernet is not a real PCI device and we can thus avoid the
98 * performance hit caused by the PCI workarounds.
100 out_be32(card->regs + reg, value);
104 * spider_net_write_phy - write to phy register
105 * @netdev: adapter to be written to
108 * @val: value to be written to phy register
110 * spider_net_write_phy_register writes to an arbitrary PHY
111 * register via the spider GPCWOPCMD register. We assume the queue does
112 * not run full (not more than 15 commands outstanding).
115 spider_net_write_phy(struct net_device *netdev, int mii_id,
118 struct spider_net_card *card = netdev_priv(netdev);
121 writevalue = ((u32)mii_id << 21) |
122 ((u32)reg << 16) | ((u32)val);
124 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
128 * spider_net_read_phy - read from phy register
129 * @netdev: network device to be read from
133 * Returns value read from PHY register
135 * spider_net_write_phy reads from an arbitrary PHY
136 * register via the spider GPCROPCMD register
139 spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
141 struct spider_net_card *card = netdev_priv(netdev);
144 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
145 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
147 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
148 * interrupt, as we poll for the completion of the read operation
149 * in spider_net_read_phy. Should take about 50 us */
151 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
152 } while (readvalue & SPIDER_NET_GPREXEC);
154 readvalue &= SPIDER_NET_GPRDAT_MASK;
160 * spider_net_setup_aneg - initial auto-negotiation setup
161 * @card: device structure
164 spider_net_setup_aneg(struct spider_net_card *card)
166 struct mii_phy *phy = &card->phy;
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);
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;
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;
187 sungem_phy_probe(phy, phy->mii_id);
188 phy->def->ops->setup_aneg(phy, advertise);
193 * spider_net_rx_irq_off - switch off rx irq on this spider card
194 * @card: device structure
196 * switches off rx irq by masking them out in the GHIINTnMSK register
199 spider_net_rx_irq_off(struct spider_net_card *card)
203 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
204 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
208 * spider_net_rx_irq_on - switch on rx irq on this spider card
209 * @card: device structure
211 * switches on rx irq by enabling them in the GHIINTnMSK register
214 spider_net_rx_irq_on(struct spider_net_card *card)
218 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
219 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
223 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
224 * @card: card structure
226 * spider_net_set_promisc sets the unicast destination address filter and
227 * thus either allows for non-promisc mode or promisc mode
230 spider_net_set_promisc(struct spider_net_card *card)
233 struct net_device *netdev = card->netdev;
235 if (netdev->flags & IFF_PROMISC) {
236 /* clear destination entry 0 */
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);
242 macu = netdev->dev_addr[0];
244 macu |= netdev->dev_addr[1];
245 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
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);
256 * spider_net_get_descr_status -- returns the status of a descriptor
257 * @descr: descriptor to look at
259 * returns the status as in the dmac_cmd_status field of the descriptor
262 spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
264 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
268 * spider_net_free_chain - free descriptor chain
269 * @card: card structure
270 * @chain: address of chain
274 spider_net_free_chain(struct spider_net_card *card,
275 struct spider_net_descr_chain *chain)
277 struct spider_net_descr *descr;
282 descr->hwdescr->next_descr_addr = 0;
284 } while (descr != chain->ring);
286 dma_free_coherent(&card->pdev->dev, chain->num_desc,
287 chain->hwring, chain->dma_addr);
291 * spider_net_init_chain - alloc and link descriptor chain
292 * @card: card structure
293 * @chain: address of chain
295 * We manage a circular list that mirrors the hardware structure,
296 * except that the hardware uses bus addresses.
298 * Returns 0 on success, <0 on failure
301 spider_net_init_chain(struct spider_net_card *card,
302 struct spider_net_descr_chain *chain)
305 struct spider_net_descr *descr;
306 struct spider_net_hw_descr *hwdescr;
310 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
312 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
313 &chain->dma_addr, GFP_KERNEL);
317 memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr));
319 /* Set up the hardware pointers in each descriptor */
321 hwdescr = chain->hwring;
322 buf = chain->dma_addr;
323 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
324 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
325 hwdescr->next_descr_addr = 0;
327 descr->hwdescr = hwdescr;
328 descr->bus_addr = buf;
329 descr->next = descr + 1;
330 descr->prev = descr - 1;
332 buf += sizeof(struct spider_net_hw_descr);
334 /* do actual circular list */
335 (descr-1)->next = chain->ring;
336 chain->ring->prev = descr-1;
338 spin_lock_init(&chain->lock);
339 chain->head = chain->ring;
340 chain->tail = chain->ring;
345 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
346 * @card: card structure
348 * returns 0 on success, <0 on failure
351 spider_net_free_rx_chain_contents(struct spider_net_card *card)
353 struct spider_net_descr *descr;
355 descr = card->rx_chain.head;
358 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
359 SPIDER_NET_MAX_FRAME,
360 PCI_DMA_BIDIRECTIONAL);
361 dev_kfree_skb(descr->skb);
365 } while (descr != card->rx_chain.head);
369 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
370 * @card: card structure
371 * @descr: descriptor to re-init
373 * Return 0 on success, <0 on failure.
375 * Allocates a new rx skb, iommu-maps it and attaches it to the
376 * descriptor. Mark the descriptor as activated, ready-to-use.
379 spider_net_prepare_rx_descr(struct spider_net_card *card,
380 struct spider_net_descr *descr)
382 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
387 /* we need to round up the buffer size to a multiple of 128 */
388 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
389 (~(SPIDER_NET_RXBUF_ALIGN - 1));
391 /* and we need to have it 128 byte aligned, therefore we allocate a
393 /* allocate an skb */
394 descr->skb = netdev_alloc_skb(card->netdev,
395 bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
397 if (netif_msg_rx_err(card) && net_ratelimit())
398 dev_err(&card->netdev->dev,
399 "Not enough memory to allocate rx buffer\n");
400 card->spider_stats.alloc_rx_skb_error++;
403 hwdescr->buf_size = bufsize;
404 hwdescr->result_size = 0;
405 hwdescr->valid_size = 0;
406 hwdescr->data_status = 0;
407 hwdescr->data_error = 0;
409 offset = ((unsigned long)descr->skb->data) &
410 (SPIDER_NET_RXBUF_ALIGN - 1);
412 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
413 /* iommu-map the skb */
414 buf = pci_map_single(card->pdev, descr->skb->data,
415 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
416 if (pci_dma_mapping_error(card->pdev, buf)) {
417 dev_kfree_skb_any(descr->skb);
419 if (netif_msg_rx_err(card) && net_ratelimit())
420 dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n");
421 card->spider_stats.rx_iommu_map_error++;
422 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
424 hwdescr->buf_addr = buf;
426 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
427 SPIDER_NET_DMAC_NOINTR_COMPLETE;
434 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
435 * @card: card structure
437 * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the
438 * chip by writing to the appropriate register. DMA is enabled in
439 * spider_net_enable_rxdmac.
442 spider_net_enable_rxchtails(struct spider_net_card *card)
444 /* assume chain is aligned correctly */
445 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
446 card->rx_chain.tail->bus_addr);
450 * spider_net_enable_rxdmac - enables a receive DMA controller
451 * @card: card structure
453 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
454 * in the GDADMACCNTR register
457 spider_net_enable_rxdmac(struct spider_net_card *card)
460 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
461 SPIDER_NET_DMA_RX_VALUE);
465 * spider_net_disable_rxdmac - disables the receive DMA controller
466 * @card: card structure
468 * spider_net_disable_rxdmac terminates processing on the DMA controller
469 * by turing off the DMA controller, with the force-end flag set.
472 spider_net_disable_rxdmac(struct spider_net_card *card)
474 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
475 SPIDER_NET_DMA_RX_FEND_VALUE);
479 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
480 * @card: card structure
482 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
485 spider_net_refill_rx_chain(struct spider_net_card *card)
487 struct spider_net_descr_chain *chain = &card->rx_chain;
490 /* one context doing the refill (and a second context seeing that
491 * and omitting it) is ok. If called by NAPI, we'll be called again
492 * as spider_net_decode_one_descr is called several times. If some
493 * interrupt calls us, the NAPI is about to clean up anyway. */
494 if (!spin_trylock_irqsave(&chain->lock, flags))
497 while (spider_net_get_descr_status(chain->head->hwdescr) ==
498 SPIDER_NET_DESCR_NOT_IN_USE) {
499 if (spider_net_prepare_rx_descr(card, chain->head))
501 chain->head = chain->head->next;
504 spin_unlock_irqrestore(&chain->lock, flags);
508 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
509 * @card: card structure
511 * Returns 0 on success, <0 on failure.
514 spider_net_alloc_rx_skbs(struct spider_net_card *card)
516 struct spider_net_descr_chain *chain = &card->rx_chain;
517 struct spider_net_descr *start = chain->tail;
518 struct spider_net_descr *descr = start;
520 /* Link up the hardware chain pointers */
522 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
524 } while (descr != start);
526 /* Put at least one buffer into the chain. if this fails,
527 * we've got a problem. If not, spider_net_refill_rx_chain
528 * will do the rest at the end of this function. */
529 if (spider_net_prepare_rx_descr(card, chain->head))
532 chain->head = chain->head->next;
534 /* This will allocate the rest of the rx buffers;
535 * if not, it's business as usual later on. */
536 spider_net_refill_rx_chain(card);
537 spider_net_enable_rxdmac(card);
541 spider_net_free_rx_chain_contents(card);
546 * spider_net_get_multicast_hash - generates hash for multicast filter table
547 * @addr: multicast address
549 * returns the hash value.
551 * spider_net_get_multicast_hash calculates a hash value for a given multicast
552 * address, that is used to set the multicast filter tables
555 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
559 char addr_for_crc[ETH_ALEN] = { 0, };
562 for (i = 0; i < ETH_ALEN * 8; i++) {
563 bit = (addr[i / 8] >> (i % 8)) & 1;
564 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
567 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
578 * spider_net_set_multi - sets multicast addresses and promisc flags
579 * @netdev: interface device structure
581 * spider_net_set_multi configures multicast addresses as needed for the
582 * netdev interface. It also sets up multicast, allmulti and promisc
583 * flags appropriately
586 spider_net_set_multi(struct net_device *netdev)
588 struct netdev_hw_addr *ha;
592 struct spider_net_card *card = netdev_priv(netdev);
593 DECLARE_BITMAP(bitmask, SPIDER_NET_MULTICAST_HASHES) = {};
595 spider_net_set_promisc(card);
597 if (netdev->flags & IFF_ALLMULTI) {
598 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
604 /* well, we know, what the broadcast hash value is: it's xfd
605 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
606 set_bit(0xfd, bitmask);
608 netdev_for_each_mc_addr(ha, netdev) {
609 hash = spider_net_get_multicast_hash(netdev, ha->addr);
610 set_bit(hash, bitmask);
614 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
616 if (test_bit(i * 4, bitmask))
619 if (test_bit(i * 4 + 1, bitmask))
622 if (test_bit(i * 4 + 2, bitmask))
625 if (test_bit(i * 4 + 3, bitmask))
628 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
633 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
634 * @card: card structure
635 * @skb: packet to use
637 * returns 0 on success, <0 on failure.
639 * fills out the descriptor structure with skb data and len. Copies data,
640 * if needed (32bit DMA!)
643 spider_net_prepare_tx_descr(struct spider_net_card *card,
646 struct spider_net_descr_chain *chain = &card->tx_chain;
647 struct spider_net_descr *descr;
648 struct spider_net_hw_descr *hwdescr;
652 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
653 if (pci_dma_mapping_error(card->pdev, buf)) {
654 if (netif_msg_tx_err(card) && net_ratelimit())
655 dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). "
656 "Dropping packet\n", skb->data, skb->len);
657 card->spider_stats.tx_iommu_map_error++;
661 spin_lock_irqsave(&chain->lock, flags);
662 descr = card->tx_chain.head;
663 if (descr->next == chain->tail->prev) {
664 spin_unlock_irqrestore(&chain->lock, flags);
665 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
668 hwdescr = descr->hwdescr;
669 chain->head = descr->next;
672 hwdescr->buf_addr = buf;
673 hwdescr->buf_size = skb->len;
674 hwdescr->next_descr_addr = 0;
675 hwdescr->data_status = 0;
677 hwdescr->dmac_cmd_status =
678 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL;
679 spin_unlock_irqrestore(&chain->lock, flags);
681 if (skb->ip_summed == CHECKSUM_PARTIAL)
682 switch (ip_hdr(skb)->protocol) {
684 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
687 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
691 /* Chain the bus address, so that the DMA engine finds this descr. */
693 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
695 netif_trans_update(card->netdev); /* set netdev watchdog timer */
700 spider_net_set_low_watermark(struct spider_net_card *card)
702 struct spider_net_descr *descr = card->tx_chain.tail;
703 struct spider_net_hw_descr *hwdescr;
709 /* Measure the length of the queue. Measurement does not
710 * need to be precise -- does not need a lock. */
711 while (descr != card->tx_chain.head) {
712 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
713 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
719 /* If TX queue is short, don't even bother with interrupts */
720 if (cnt < card->tx_chain.num_desc/4)
723 /* Set low-watermark 3/4th's of the way into the queue. */
724 descr = card->tx_chain.tail;
729 /* Set the new watermark, clear the old watermark */
730 spin_lock_irqsave(&card->tx_chain.lock, flags);
731 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
732 if (card->low_watermark && card->low_watermark != descr) {
733 hwdescr = card->low_watermark->hwdescr;
734 hwdescr->dmac_cmd_status =
735 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
737 card->low_watermark = descr;
738 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
743 * spider_net_release_tx_chain - processes sent tx descriptors
744 * @card: adapter structure
745 * @brutal: if set, don't care about whether descriptor seems to be in use
747 * returns 0 if the tx ring is empty, otherwise 1.
749 * spider_net_release_tx_chain releases the tx descriptors that spider has
750 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
751 * If some other context is calling this function, we return 1 so that we're
752 * scheduled again (if we were scheduled) and will not lose initiative.
755 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
757 struct net_device *dev = card->netdev;
758 struct spider_net_descr_chain *chain = &card->tx_chain;
759 struct spider_net_descr *descr;
760 struct spider_net_hw_descr *hwdescr;
767 spin_lock_irqsave(&chain->lock, flags);
768 if (chain->tail == chain->head) {
769 spin_unlock_irqrestore(&chain->lock, flags);
773 hwdescr = descr->hwdescr;
775 status = spider_net_get_descr_status(hwdescr);
777 case SPIDER_NET_DESCR_COMPLETE:
778 dev->stats.tx_packets++;
779 dev->stats.tx_bytes += descr->skb->len;
782 case SPIDER_NET_DESCR_CARDOWNED:
784 spin_unlock_irqrestore(&chain->lock, flags);
788 /* fallthrough, if we release the descriptors
789 * brutally (then we don't care about
790 * SPIDER_NET_DESCR_CARDOWNED) */
792 case SPIDER_NET_DESCR_RESPONSE_ERROR:
793 case SPIDER_NET_DESCR_PROTECTION_ERROR:
794 case SPIDER_NET_DESCR_FORCE_END:
795 if (netif_msg_tx_err(card))
796 dev_err(&card->netdev->dev, "forcing end of tx descriptor "
797 "with status x%02x\n", status);
798 dev->stats.tx_errors++;
802 dev->stats.tx_dropped++;
804 spin_unlock_irqrestore(&chain->lock, flags);
809 chain->tail = descr->next;
810 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
813 buf_addr = hwdescr->buf_addr;
814 spin_unlock_irqrestore(&chain->lock, flags);
818 pci_unmap_single(card->pdev, buf_addr, skb->len,
820 dev_consume_skb_any(skb);
827 * spider_net_kick_tx_dma - enables TX DMA processing
828 * @card: card structure
830 * This routine will start the transmit DMA running if
831 * it is not already running. This routine ned only be
832 * called when queueing a new packet to an empty tx queue.
833 * Writes the current tx chain head as start address
834 * of the tx descriptor chain and enables the transmission
838 spider_net_kick_tx_dma(struct spider_net_card *card)
840 struct spider_net_descr *descr;
842 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
843 SPIDER_NET_TX_DMA_EN)
846 descr = card->tx_chain.tail;
848 if (spider_net_get_descr_status(descr->hwdescr) ==
849 SPIDER_NET_DESCR_CARDOWNED) {
850 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
852 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
853 SPIDER_NET_DMA_TX_VALUE);
856 if (descr == card->tx_chain.head)
862 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
866 * spider_net_xmit - transmits a frame over the device
867 * @skb: packet to send out
868 * @netdev: interface device structure
870 * returns NETDEV_TX_OK on success, NETDEV_TX_BUSY on failure
873 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
876 struct spider_net_card *card = netdev_priv(netdev);
878 spider_net_release_tx_chain(card, 0);
880 if (spider_net_prepare_tx_descr(card, skb) != 0) {
881 netdev->stats.tx_dropped++;
882 netif_stop_queue(netdev);
883 return NETDEV_TX_BUSY;
886 cnt = spider_net_set_low_watermark(card);
888 spider_net_kick_tx_dma(card);
893 * spider_net_cleanup_tx_ring - cleans up the TX ring
894 * @card: card structure
896 * spider_net_cleanup_tx_ring is called by either the tx_timer
897 * or from the NAPI polling routine.
898 * This routine releases resources associted with transmitted
899 * packets, including updating the queue tail pointer.
902 spider_net_cleanup_tx_ring(struct timer_list *t)
904 struct spider_net_card *card = from_timer(card, t, tx_timer);
905 if ((spider_net_release_tx_chain(card, 0) != 0) &&
906 (card->netdev->flags & IFF_UP)) {
907 spider_net_kick_tx_dma(card);
908 netif_wake_queue(card->netdev);
913 * spider_net_do_ioctl - called for device ioctls
914 * @netdev: interface device structure
915 * @ifr: request parameter structure for ioctl
916 * @cmd: command code for ioctl
918 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
919 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
922 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
931 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
932 * @descr: descriptor to process
933 * @card: card structure
935 * Fills out skb structure and passes the data to the stack.
936 * The descriptor state is not changed.
939 spider_net_pass_skb_up(struct spider_net_descr *descr,
940 struct spider_net_card *card)
942 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
943 struct sk_buff *skb = descr->skb;
944 struct net_device *netdev = card->netdev;
945 u32 data_status = hwdescr->data_status;
946 u32 data_error = hwdescr->data_error;
948 skb_put(skb, hwdescr->valid_size);
950 /* the card seems to add 2 bytes of junk in front
951 * of the ethernet frame */
952 #define SPIDER_MISALIGN 2
953 skb_pull(skb, SPIDER_MISALIGN);
954 skb->protocol = eth_type_trans(skb, netdev);
956 /* checksum offload */
957 skb_checksum_none_assert(skb);
958 if (netdev->features & NETIF_F_RXCSUM) {
959 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
960 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
961 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
962 skb->ip_summed = CHECKSUM_UNNECESSARY;
965 if (data_status & SPIDER_NET_VLAN_PACKET) {
966 /* further enhancements: HW-accel VLAN */
969 /* update netdevice statistics */
970 netdev->stats.rx_packets++;
971 netdev->stats.rx_bytes += skb->len;
973 /* pass skb up to stack */
974 netif_receive_skb(skb);
977 static void show_rx_chain(struct spider_net_card *card)
979 struct spider_net_descr_chain *chain = &card->rx_chain;
980 struct spider_net_descr *start= chain->tail;
981 struct spider_net_descr *descr= start;
982 struct spider_net_hw_descr *hwd = start->hwdescr;
983 struct device *dev = &card->netdev->dev;
984 u32 curr_desc, next_desc;
989 int off = start - chain->ring;
990 int cstat = hwd->dmac_cmd_status;
992 dev_info(dev, "Total number of descrs=%d\n",
994 dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n",
997 curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA);
998 next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA);
1003 hwd = descr->hwdescr;
1004 off = descr - chain->ring;
1005 status = hwd->dmac_cmd_status;
1007 if (descr == chain->head)
1008 dev_info(dev, "Chain head is at %d, head status=0x%x\n",
1011 if (curr_desc == descr->bus_addr)
1012 dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n",
1015 if (next_desc == descr->bus_addr)
1016 dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n",
1019 if (hwd->next_descr_addr == 0)
1020 dev_info(dev, "chain is cut at %d\n", off);
1022 if (cstat != status) {
1023 int from = (chain->num_desc + off - cnt) % chain->num_desc;
1024 int to = (chain->num_desc + off - 1) % chain->num_desc;
1025 dev_info(dev, "Have %d (from %d to %d) descrs "
1026 "with stat=0x%08x\n", cnt, from, to, cstat);
1033 descr = descr->next;
1034 } while (descr != start);
1036 dev_info(dev, "Last %d descrs with stat=0x%08x "
1037 "for a total of %d descrs\n", cnt, cstat, tot);
1040 /* Now dump the whole ring */
1044 struct spider_net_hw_descr *hwd = descr->hwdescr;
1045 status = spider_net_get_descr_status(hwd);
1046 cnt = descr - chain->ring;
1047 dev_info(dev, "Descr %d stat=0x%08x skb=%p\n",
1048 cnt, status, descr->skb);
1049 dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n",
1050 descr->bus_addr, hwd->buf_addr, hwd->buf_size);
1051 dev_info(dev, "next=%08x result sz=%d valid sz=%d\n",
1052 hwd->next_descr_addr, hwd->result_size,
1054 dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n",
1055 hwd->dmac_cmd_status, hwd->data_status,
1057 dev_info(dev, "\n");
1059 descr = descr->next;
1060 } while (descr != start);
1066 * spider_net_resync_head_ptr - Advance head ptr past empty descrs
1068 * If the driver fails to keep up and empty the queue, then the
1069 * hardware wil run out of room to put incoming packets. This
1070 * will cause the hardware to skip descrs that are full (instead
1071 * of halting/retrying). Thus, once the driver runs, it wil need
1072 * to "catch up" to where the hardware chain pointer is at.
1074 static void spider_net_resync_head_ptr(struct spider_net_card *card)
1076 unsigned long flags;
1077 struct spider_net_descr_chain *chain = &card->rx_chain;
1078 struct spider_net_descr *descr;
1081 /* Advance head pointer past any empty descrs */
1082 descr = chain->head;
1083 status = spider_net_get_descr_status(descr->hwdescr);
1085 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
1088 spin_lock_irqsave(&chain->lock, flags);
1090 descr = chain->head;
1091 status = spider_net_get_descr_status(descr->hwdescr);
1092 for (i=0; i<chain->num_desc; i++) {
1093 if (status != SPIDER_NET_DESCR_CARDOWNED) break;
1094 descr = descr->next;
1095 status = spider_net_get_descr_status(descr->hwdescr);
1097 chain->head = descr;
1099 spin_unlock_irqrestore(&chain->lock, flags);
1102 static int spider_net_resync_tail_ptr(struct spider_net_card *card)
1104 struct spider_net_descr_chain *chain = &card->rx_chain;
1105 struct spider_net_descr *descr;
1108 /* Advance tail pointer past any empty and reaped descrs */
1109 descr = chain->tail;
1110 status = spider_net_get_descr_status(descr->hwdescr);
1112 for (i=0; i<chain->num_desc; i++) {
1113 if ((status != SPIDER_NET_DESCR_CARDOWNED) &&
1114 (status != SPIDER_NET_DESCR_NOT_IN_USE)) break;
1115 descr = descr->next;
1116 status = spider_net_get_descr_status(descr->hwdescr);
1118 chain->tail = descr;
1120 if ((i == chain->num_desc) || (i == 0))
1126 * spider_net_decode_one_descr - processes an RX descriptor
1127 * @card: card structure
1129 * Returns 1 if a packet has been sent to the stack, otherwise 0.
1131 * Processes an RX descriptor by iommu-unmapping the data buffer
1132 * and passing the packet up to the stack. This function is called
1133 * in softirq context, e.g. either bottom half from interrupt or
1134 * NAPI polling context.
1137 spider_net_decode_one_descr(struct spider_net_card *card)
1139 struct net_device *dev = card->netdev;
1140 struct spider_net_descr_chain *chain = &card->rx_chain;
1141 struct spider_net_descr *descr = chain->tail;
1142 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
1146 status = spider_net_get_descr_status(hwdescr);
1148 /* Nothing in the descriptor, or ring must be empty */
1149 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1150 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1153 /* descriptor definitively used -- move on tail */
1154 chain->tail = descr->next;
1156 /* unmap descriptor */
1157 hw_buf_addr = hwdescr->buf_addr;
1158 hwdescr->buf_addr = 0xffffffff;
1159 pci_unmap_single(card->pdev, hw_buf_addr,
1160 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1162 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1163 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1164 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1165 if (netif_msg_rx_err(card))
1167 "dropping RX descriptor with state %d\n", status);
1168 dev->stats.rx_dropped++;
1172 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1173 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1174 if (netif_msg_rx_err(card))
1175 dev_err(&card->netdev->dev,
1176 "RX descriptor with unknown state %d\n", status);
1177 card->spider_stats.rx_desc_unk_state++;
1181 /* The cases we'll throw away the packet immediately */
1182 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
1183 if (netif_msg_rx_err(card))
1184 dev_err(&card->netdev->dev,
1185 "error in received descriptor found, "
1186 "data_status=x%08x, data_error=x%08x\n",
1187 hwdescr->data_status, hwdescr->data_error);
1191 if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) {
1192 dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n",
1193 hwdescr->dmac_cmd_status);
1194 pr_err("buf_addr=x%08x\n", hw_buf_addr);
1195 pr_err("buf_size=x%08x\n", hwdescr->buf_size);
1196 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
1197 pr_err("result_size=x%08x\n", hwdescr->result_size);
1198 pr_err("valid_size=x%08x\n", hwdescr->valid_size);
1199 pr_err("data_status=x%08x\n", hwdescr->data_status);
1200 pr_err("data_error=x%08x\n", hwdescr->data_error);
1201 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1203 card->spider_stats.rx_desc_error++;
1207 /* Ok, we've got a packet in descr */
1208 spider_net_pass_skb_up(descr, card);
1210 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1214 if (netif_msg_rx_err(card))
1215 show_rx_chain(card);
1216 dev_kfree_skb_irq(descr->skb);
1218 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1223 * spider_net_poll - NAPI poll function called by the stack to return packets
1224 * @netdev: interface device structure
1225 * @budget: number of packets we can pass to the stack at most
1227 * returns 0 if no more packets available to the driver/stack. Returns 1,
1228 * if the quota is exceeded, but the driver has still packets.
1230 * spider_net_poll returns all packets from the rx descriptors to the stack
1231 * (using netif_receive_skb). If all/enough packets are up, the driver
1232 * reenables interrupts and returns 0. If not, 1 is returned.
1234 static int spider_net_poll(struct napi_struct *napi, int budget)
1236 struct spider_net_card *card = container_of(napi, struct spider_net_card, napi);
1237 int packets_done = 0;
1239 while (packets_done < budget) {
1240 if (!spider_net_decode_one_descr(card))
1246 if ((packets_done == 0) && (card->num_rx_ints != 0)) {
1247 if (!spider_net_resync_tail_ptr(card))
1248 packets_done = budget;
1249 spider_net_resync_head_ptr(card);
1251 card->num_rx_ints = 0;
1253 spider_net_refill_rx_chain(card);
1254 spider_net_enable_rxdmac(card);
1256 spider_net_cleanup_tx_ring(&card->tx_timer);
1258 /* if all packets are in the stack, enable interrupts and return 0 */
1259 /* if not, return 1 */
1260 if (packets_done < budget) {
1261 napi_complete_done(napi, packets_done);
1262 spider_net_rx_irq_on(card);
1263 card->ignore_rx_ramfull = 0;
1266 return packets_done;
1270 * spider_net_set_mac - sets the MAC of an interface
1271 * @netdev: interface device structure
1272 * @ptr: pointer to new MAC address
1274 * Returns 0 on success, <0 on failure. Currently, we don't support this
1275 * and will always return EOPNOTSUPP.
1278 spider_net_set_mac(struct net_device *netdev, void *p)
1280 struct spider_net_card *card = netdev_priv(netdev);
1281 u32 macl, macu, regvalue;
1282 struct sockaddr *addr = p;
1284 if (!is_valid_ether_addr(addr->sa_data))
1285 return -EADDRNOTAVAIL;
1287 memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
1289 /* switch off GMACTPE and GMACRPE */
1290 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1291 regvalue &= ~((1 << 5) | (1 << 6));
1292 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1295 macu = (netdev->dev_addr[0]<<24) + (netdev->dev_addr[1]<<16) +
1296 (netdev->dev_addr[2]<<8) + (netdev->dev_addr[3]);
1297 macl = (netdev->dev_addr[4]<<8) + (netdev->dev_addr[5]);
1298 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1299 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1301 /* switch GMACTPE and GMACRPE back on */
1302 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1303 regvalue |= ((1 << 5) | (1 << 6));
1304 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1306 spider_net_set_promisc(card);
1312 * spider_net_link_reset
1313 * @netdev: net device structure
1315 * This is called when the PHY_LINK signal is asserted. For the blade this is
1316 * not connected so we should never get here.
1320 spider_net_link_reset(struct net_device *netdev)
1323 struct spider_net_card *card = netdev_priv(netdev);
1325 del_timer_sync(&card->aneg_timer);
1327 /* clear interrupt, block further interrupts */
1328 spider_net_write_reg(card, SPIDER_NET_GMACST,
1329 spider_net_read_reg(card, SPIDER_NET_GMACST));
1330 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1332 /* reset phy and setup aneg */
1333 card->aneg_count = 0;
1334 card->medium = BCM54XX_COPPER;
1335 spider_net_setup_aneg(card);
1336 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1341 * spider_net_handle_error_irq - handles errors raised by an interrupt
1342 * @card: card structure
1343 * @status_reg: interrupt status register 0 (GHIINT0STS)
1345 * spider_net_handle_error_irq treats or ignores all error conditions
1346 * found when an interrupt is presented
1349 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg,
1350 u32 error_reg1, u32 error_reg2)
1355 /* check GHIINT0STS ************************************/
1357 for (i = 0; i < 32; i++)
1358 if (status_reg & (1<<i))
1361 /* let error_reg1 and error_reg2 evaluation decide, what to do
1362 case SPIDER_NET_PHYINT:
1363 case SPIDER_NET_GMAC2INT:
1364 case SPIDER_NET_GMAC1INT:
1365 case SPIDER_NET_GFIFOINT:
1366 case SPIDER_NET_DMACINT:
1367 case SPIDER_NET_GSYSINT:
1370 case SPIDER_NET_GIPSINT:
1374 case SPIDER_NET_GPWOPCMPINT:
1375 /* PHY write operation completed */
1378 case SPIDER_NET_GPROPCMPINT:
1379 /* PHY read operation completed */
1380 /* we don't use semaphores, as we poll for the completion
1381 * of the read operation in spider_net_read_phy. Should take
1385 case SPIDER_NET_GPWFFINT:
1386 /* PHY command queue full */
1387 if (netif_msg_intr(card))
1388 dev_err(&card->netdev->dev, "PHY write queue full\n");
1392 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1393 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1394 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1396 case SPIDER_NET_GDTDEN0INT:
1397 /* someone has set TX_DMA_EN to 0 */
1401 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1402 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1403 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1404 case SPIDER_NET_GDADEN0INT:
1405 /* someone has set RX_DMA_EN to 0 */
1410 case SPIDER_NET_GDDFDCINT:
1411 case SPIDER_NET_GDCFDCINT:
1412 case SPIDER_NET_GDBFDCINT:
1413 case SPIDER_NET_GDAFDCINT:
1414 /* case SPIDER_NET_GDNMINT: not used. print a message */
1415 /* case SPIDER_NET_GCNMINT: not used. print a message */
1416 /* case SPIDER_NET_GBNMINT: not used. print a message */
1417 /* case SPIDER_NET_GANMINT: not used. print a message */
1418 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1423 case SPIDER_NET_GDTFDCINT:
1426 case SPIDER_NET_GTTEDINT:
1429 case SPIDER_NET_GDTDCEINT:
1430 /* chain end. If a descriptor should be sent, kick off
1432 if (card->tx_chain.tail != card->tx_chain.head)
1433 spider_net_kick_tx_dma(card);
1438 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1439 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1442 /* check GHIINT1STS ************************************/
1444 for (i = 0; i < 32; i++)
1445 if (error_reg1 & (1<<i))
1448 case SPIDER_NET_GTMFLLINT:
1449 /* TX RAM full may happen on a usual case.
1450 * Logging is not needed. */
1453 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1454 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1455 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1456 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1457 case SPIDER_NET_GRMFLLINT:
1458 /* Could happen when rx chain is full */
1459 if (card->ignore_rx_ramfull == 0) {
1460 card->ignore_rx_ramfull = 1;
1461 spider_net_resync_head_ptr(card);
1462 spider_net_refill_rx_chain(card);
1463 spider_net_enable_rxdmac(card);
1464 card->num_rx_ints ++;
1465 napi_schedule(&card->napi);
1470 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1471 case SPIDER_NET_GDTINVDINT:
1472 /* allrighty. tx from previous descr ok */
1477 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1478 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1479 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1480 case SPIDER_NET_GDADCEINT:
1481 spider_net_resync_head_ptr(card);
1482 spider_net_refill_rx_chain(card);
1483 spider_net_enable_rxdmac(card);
1484 card->num_rx_ints ++;
1485 napi_schedule(&card->napi);
1489 /* invalid descriptor */
1490 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1491 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1492 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1493 case SPIDER_NET_GDAINVDINT:
1494 /* Could happen when rx chain is full */
1495 spider_net_resync_head_ptr(card);
1496 spider_net_refill_rx_chain(card);
1497 spider_net_enable_rxdmac(card);
1498 card->num_rx_ints ++;
1499 napi_schedule(&card->napi);
1503 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1504 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1505 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1506 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1507 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1508 /* case SPIDER_NET_GDSERINT: problem, print a message */
1509 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1510 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1511 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1512 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1513 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1519 /* check GHIINT2STS ************************************/
1521 for (i = 0; i < 32; i++)
1522 if (error_reg2 & (1<<i))
1525 /* there is nothing we can (want to) do at this time. Log a
1526 * message, we can switch on and off the specific values later on
1527 case SPIDER_NET_GPROPERINT:
1528 case SPIDER_NET_GMCTCRSNGINT:
1529 case SPIDER_NET_GMCTLCOLINT:
1530 case SPIDER_NET_GMCTTMOTINT:
1531 case SPIDER_NET_GMCRCAERINT:
1532 case SPIDER_NET_GMCRCALERINT:
1533 case SPIDER_NET_GMCRALNERINT:
1534 case SPIDER_NET_GMCROVRINT:
1535 case SPIDER_NET_GMCRRNTINT:
1536 case SPIDER_NET_GMCRRXERINT:
1537 case SPIDER_NET_GTITCSERINT:
1538 case SPIDER_NET_GTIFMTERINT:
1539 case SPIDER_NET_GTIPKTRVKINT:
1540 case SPIDER_NET_GTISPINGINT:
1541 case SPIDER_NET_GTISADNGINT:
1542 case SPIDER_NET_GTISPDNGINT:
1543 case SPIDER_NET_GRIFMTERINT:
1544 case SPIDER_NET_GRIPKTRVKINT:
1545 case SPIDER_NET_GRISPINGINT:
1546 case SPIDER_NET_GRISADNGINT:
1547 case SPIDER_NET_GRISPDNGINT:
1554 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
1555 dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, "
1556 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1557 status_reg, error_reg1, error_reg2);
1559 /* clear interrupt sources */
1560 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1561 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1565 * spider_net_interrupt - interrupt handler for spider_net
1566 * @irq: interrupt number
1567 * @ptr: pointer to net_device
1569 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1570 * interrupt found raised by card.
1572 * This is the interrupt handler, that turns off
1573 * interrupts for this device and makes the stack poll the driver
1576 spider_net_interrupt(int irq, void *ptr)
1578 struct net_device *netdev = ptr;
1579 struct spider_net_card *card = netdev_priv(netdev);
1580 u32 status_reg, error_reg1, error_reg2;
1582 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1583 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1584 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1586 if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) &&
1587 !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) &&
1588 !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE))
1591 if (status_reg & SPIDER_NET_RXINT ) {
1592 spider_net_rx_irq_off(card);
1593 napi_schedule(&card->napi);
1594 card->num_rx_ints ++;
1596 if (status_reg & SPIDER_NET_TXINT)
1597 napi_schedule(&card->napi);
1599 if (status_reg & SPIDER_NET_LINKINT)
1600 spider_net_link_reset(netdev);
1602 if (status_reg & SPIDER_NET_ERRINT )
1603 spider_net_handle_error_irq(card, status_reg,
1604 error_reg1, error_reg2);
1606 /* clear interrupt sources */
1607 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1612 #ifdef CONFIG_NET_POLL_CONTROLLER
1614 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1615 * @netdev: interface device structure
1617 * see Documentation/networking/netconsole.txt
1620 spider_net_poll_controller(struct net_device *netdev)
1622 disable_irq(netdev->irq);
1623 spider_net_interrupt(netdev->irq, netdev);
1624 enable_irq(netdev->irq);
1626 #endif /* CONFIG_NET_POLL_CONTROLLER */
1629 * spider_net_enable_interrupts - enable interrupts
1630 * @card: card structure
1632 * spider_net_enable_interrupt enables several interrupts
1635 spider_net_enable_interrupts(struct spider_net_card *card)
1637 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1638 SPIDER_NET_INT0_MASK_VALUE);
1639 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1640 SPIDER_NET_INT1_MASK_VALUE);
1641 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1642 SPIDER_NET_INT2_MASK_VALUE);
1646 * spider_net_disable_interrupts - disable interrupts
1647 * @card: card structure
1649 * spider_net_disable_interrupts disables all the interrupts
1652 spider_net_disable_interrupts(struct spider_net_card *card)
1654 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1655 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1656 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1657 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1661 * spider_net_init_card - initializes the card
1662 * @card: card structure
1664 * spider_net_init_card initializes the card so that other registers can
1668 spider_net_init_card(struct spider_net_card *card)
1670 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1671 SPIDER_NET_CKRCTRL_STOP_VALUE);
1673 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1674 SPIDER_NET_CKRCTRL_RUN_VALUE);
1676 /* trigger ETOMOD signal */
1677 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1678 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1680 spider_net_disable_interrupts(card);
1684 * spider_net_enable_card - enables the card by setting all kinds of regs
1685 * @card: card structure
1687 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1690 spider_net_enable_card(struct spider_net_card *card)
1693 /* the following array consists of (register),(value) pairs
1694 * that are set in this function. A register of 0 ends the list */
1696 { SPIDER_NET_GRESUMINTNUM, 0 },
1697 { SPIDER_NET_GREINTNUM, 0 },
1699 /* set interrupt frame number registers */
1700 /* clear the single DMA engine registers first */
1701 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1702 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1703 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1704 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1705 /* then set, what we really need */
1706 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1708 /* timer counter registers and stuff */
1709 { SPIDER_NET_GFREECNNUM, 0 },
1710 { SPIDER_NET_GONETIMENUM, 0 },
1711 { SPIDER_NET_GTOUTFRMNUM, 0 },
1713 /* RX mode setting */
1714 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1715 /* TX mode setting */
1716 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1717 /* IPSEC mode setting */
1718 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1720 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1722 { SPIDER_NET_GMRWOLCTRL, 0 },
1723 { SPIDER_NET_GTESTMD, 0x10000000 },
1724 { SPIDER_NET_GTTQMSK, 0x00400040 },
1726 { SPIDER_NET_GMACINTEN, 0 },
1728 /* flow control stuff */
1729 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1730 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1732 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1737 while (regs[i][0]) {
1738 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1742 /* clear unicast filter table entries 1 to 14 */
1743 for (i = 1; i <= 14; i++) {
1744 spider_net_write_reg(card,
1745 SPIDER_NET_GMRUAFILnR + i * 8,
1747 spider_net_write_reg(card,
1748 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1752 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1754 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1756 /* set chain tail address for RX chains and
1758 spider_net_enable_rxchtails(card);
1759 spider_net_enable_rxdmac(card);
1761 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1763 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1764 SPIDER_NET_LENLMT_VALUE);
1765 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1766 SPIDER_NET_OPMODE_VALUE);
1768 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1769 SPIDER_NET_GDTBSTA);
1773 * spider_net_download_firmware - loads firmware into the adapter
1774 * @card: card structure
1775 * @firmware_ptr: pointer to firmware data
1777 * spider_net_download_firmware loads the firmware data into the
1778 * adapter. It assumes the length etc. to be allright.
1781 spider_net_download_firmware(struct spider_net_card *card,
1782 const void *firmware_ptr)
1785 const u32 *fw_ptr = firmware_ptr;
1787 /* stop sequencers */
1788 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1789 SPIDER_NET_STOP_SEQ_VALUE);
1791 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1793 spider_net_write_reg(card,
1794 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1795 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1796 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1797 sequencer * 8, *fw_ptr);
1802 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1805 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1806 SPIDER_NET_RUN_SEQ_VALUE);
1812 * spider_net_init_firmware - reads in firmware parts
1813 * @card: card structure
1815 * Returns 0 on success, <0 on failure
1817 * spider_net_init_firmware opens the sequencer firmware and does some basic
1818 * checks. This function opens and releases the firmware structure. A call
1819 * to download the firmware is performed before the release.
1823 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1824 * the program for each sequencer. Use the command
1825 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1826 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1827 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1829 * to generate spider_fw.bin, if you have sequencer programs with something
1830 * like the following contents for each sequencer:
1831 * <ONE LINE COMMENT>
1832 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1833 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1835 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1838 spider_net_init_firmware(struct spider_net_card *card)
1840 struct firmware *firmware = NULL;
1841 struct device_node *dn;
1842 const u8 *fw_prop = NULL;
1846 if (request_firmware((const struct firmware **)&firmware,
1847 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1848 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1849 netif_msg_probe(card) ) {
1850 dev_err(&card->netdev->dev,
1851 "Incorrect size of spidernet firmware in " \
1852 "filesystem. Looking in host firmware...\n");
1855 err = spider_net_download_firmware(card, firmware->data);
1857 release_firmware(firmware);
1865 dn = pci_device_to_OF_node(card->pdev);
1869 fw_prop = of_get_property(dn, "firmware", &fw_size);
1873 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1874 netif_msg_probe(card) ) {
1875 dev_err(&card->netdev->dev,
1876 "Incorrect size of spidernet firmware in host firmware\n");
1880 err = spider_net_download_firmware(card, fw_prop);
1885 if (netif_msg_probe(card))
1886 dev_err(&card->netdev->dev,
1887 "Couldn't find spidernet firmware in filesystem " \
1888 "or host firmware\n");
1893 * spider_net_open - called upon ifonfig up
1894 * @netdev: interface device structure
1896 * returns 0 on success, <0 on failure
1898 * spider_net_open allocates all the descriptors and memory needed for
1899 * operation, sets up multicast list and enables interrupts
1902 spider_net_open(struct net_device *netdev)
1904 struct spider_net_card *card = netdev_priv(netdev);
1907 result = spider_net_init_firmware(card);
1909 goto init_firmware_failed;
1911 /* start probing with copper */
1912 card->aneg_count = 0;
1913 card->medium = BCM54XX_COPPER;
1914 spider_net_setup_aneg(card);
1915 if (card->phy.def->phy_id)
1916 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1918 result = spider_net_init_chain(card, &card->tx_chain);
1920 goto alloc_tx_failed;
1921 card->low_watermark = NULL;
1923 result = spider_net_init_chain(card, &card->rx_chain);
1925 goto alloc_rx_failed;
1927 /* Allocate rx skbs */
1928 result = spider_net_alloc_rx_skbs(card);
1930 goto alloc_skbs_failed;
1932 spider_net_set_multi(netdev);
1934 /* further enhancement: setup hw vlan, if needed */
1937 if (request_irq(netdev->irq, spider_net_interrupt,
1938 IRQF_SHARED, netdev->name, netdev))
1939 goto register_int_failed;
1941 spider_net_enable_card(card);
1943 netif_start_queue(netdev);
1944 netif_carrier_on(netdev);
1945 napi_enable(&card->napi);
1947 spider_net_enable_interrupts(card);
1951 register_int_failed:
1952 spider_net_free_rx_chain_contents(card);
1954 spider_net_free_chain(card, &card->rx_chain);
1956 spider_net_free_chain(card, &card->tx_chain);
1958 del_timer_sync(&card->aneg_timer);
1959 init_firmware_failed:
1964 * spider_net_link_phy
1965 * @data: used for pointer to card structure
1968 static void spider_net_link_phy(struct timer_list *t)
1970 struct spider_net_card *card = from_timer(card, t, aneg_timer);
1971 struct mii_phy *phy = &card->phy;
1973 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
1974 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
1976 pr_debug("%s: link is down trying to bring it up\n",
1977 card->netdev->name);
1979 switch (card->medium) {
1980 case BCM54XX_COPPER:
1981 /* enable fiber with autonegotiation first */
1982 if (phy->def->ops->enable_fiber)
1983 phy->def->ops->enable_fiber(phy, 1);
1984 card->medium = BCM54XX_FIBER;
1988 /* fiber didn't come up, try to disable fiber autoneg */
1989 if (phy->def->ops->enable_fiber)
1990 phy->def->ops->enable_fiber(phy, 0);
1991 card->medium = BCM54XX_UNKNOWN;
1994 case BCM54XX_UNKNOWN:
1995 /* copper, fiber with and without failed,
1996 * retry from beginning */
1997 spider_net_setup_aneg(card);
1998 card->medium = BCM54XX_COPPER;
2002 card->aneg_count = 0;
2003 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2007 /* link still not up, try again later */
2008 if (!(phy->def->ops->poll_link(phy))) {
2010 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2014 /* link came up, get abilities */
2015 phy->def->ops->read_link(phy);
2017 spider_net_write_reg(card, SPIDER_NET_GMACST,
2018 spider_net_read_reg(card, SPIDER_NET_GMACST));
2019 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
2021 if (phy->speed == 1000)
2022 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
2024 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
2026 card->aneg_count = 0;
2028 pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n",
2029 card->netdev->name, phy->speed,
2030 phy->duplex == 1 ? "Full" : "Half",
2031 phy->autoneg == 1 ? "" : "no ");
2035 * spider_net_setup_phy - setup PHY
2036 * @card: card structure
2038 * returns 0 on success, <0 on failure
2040 * spider_net_setup_phy is used as part of spider_net_probe.
2043 spider_net_setup_phy(struct spider_net_card *card)
2045 struct mii_phy *phy = &card->phy;
2047 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
2048 SPIDER_NET_DMASEL_VALUE);
2049 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
2050 SPIDER_NET_PHY_CTRL_VALUE);
2052 phy->dev = card->netdev;
2053 phy->mdio_read = spider_net_read_phy;
2054 phy->mdio_write = spider_net_write_phy;
2056 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
2058 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
2059 if (id != 0x0000 && id != 0xffff) {
2060 if (!sungem_phy_probe(phy, phy->mii_id)) {
2061 pr_info("Found %s.\n", phy->def->name);
2071 * spider_net_workaround_rxramfull - work around firmware bug
2072 * @card: card structure
2077 spider_net_workaround_rxramfull(struct spider_net_card *card)
2079 int i, sequencer = 0;
2082 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2083 SPIDER_NET_CKRCTRL_RUN_VALUE);
2085 /* empty sequencer data */
2086 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2088 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
2089 sequencer * 8, 0x0);
2090 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
2091 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2092 sequencer * 8, 0x0);
2096 /* set sequencer operation */
2097 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2100 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2101 SPIDER_NET_CKRCTRL_STOP_VALUE);
2105 * spider_net_stop - called upon ifconfig down
2106 * @netdev: interface device structure
2111 spider_net_stop(struct net_device *netdev)
2113 struct spider_net_card *card = netdev_priv(netdev);
2115 napi_disable(&card->napi);
2116 netif_carrier_off(netdev);
2117 netif_stop_queue(netdev);
2118 del_timer_sync(&card->tx_timer);
2119 del_timer_sync(&card->aneg_timer);
2121 spider_net_disable_interrupts(card);
2123 free_irq(netdev->irq, netdev);
2125 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2126 SPIDER_NET_DMA_TX_FEND_VALUE);
2128 /* turn off DMA, force end */
2129 spider_net_disable_rxdmac(card);
2131 /* release chains */
2132 spider_net_release_tx_chain(card, 1);
2133 spider_net_free_rx_chain_contents(card);
2135 spider_net_free_chain(card, &card->tx_chain);
2136 spider_net_free_chain(card, &card->rx_chain);
2142 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2143 * function (to be called not under interrupt status)
2144 * @data: data, is interface device structure
2146 * called as task when tx hangs, resets interface (if interface is up)
2149 spider_net_tx_timeout_task(struct work_struct *work)
2151 struct spider_net_card *card =
2152 container_of(work, struct spider_net_card, tx_timeout_task);
2153 struct net_device *netdev = card->netdev;
2155 if (!(netdev->flags & IFF_UP))
2158 netif_device_detach(netdev);
2159 spider_net_stop(netdev);
2161 spider_net_workaround_rxramfull(card);
2162 spider_net_init_card(card);
2164 if (spider_net_setup_phy(card))
2167 spider_net_open(netdev);
2168 spider_net_kick_tx_dma(card);
2169 netif_device_attach(netdev);
2172 atomic_dec(&card->tx_timeout_task_counter);
2176 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2177 * @netdev: interface device structure
2179 * called, if tx hangs. Schedules a task that resets the interface
2182 spider_net_tx_timeout(struct net_device *netdev)
2184 struct spider_net_card *card;
2186 card = netdev_priv(netdev);
2187 atomic_inc(&card->tx_timeout_task_counter);
2188 if (netdev->flags & IFF_UP)
2189 schedule_work(&card->tx_timeout_task);
2191 atomic_dec(&card->tx_timeout_task_counter);
2192 card->spider_stats.tx_timeouts++;
2195 static const struct net_device_ops spider_net_ops = {
2196 .ndo_open = spider_net_open,
2197 .ndo_stop = spider_net_stop,
2198 .ndo_start_xmit = spider_net_xmit,
2199 .ndo_set_rx_mode = spider_net_set_multi,
2200 .ndo_set_mac_address = spider_net_set_mac,
2201 .ndo_do_ioctl = spider_net_do_ioctl,
2202 .ndo_tx_timeout = spider_net_tx_timeout,
2203 .ndo_validate_addr = eth_validate_addr,
2205 #ifdef CONFIG_NET_POLL_CONTROLLER
2206 /* poll controller */
2207 .ndo_poll_controller = spider_net_poll_controller,
2208 #endif /* CONFIG_NET_POLL_CONTROLLER */
2212 * spider_net_setup_netdev_ops - initialization of net_device operations
2213 * @netdev: net_device structure
2215 * fills out function pointers in the net_device structure
2218 spider_net_setup_netdev_ops(struct net_device *netdev)
2220 netdev->netdev_ops = &spider_net_ops;
2221 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2223 netdev->ethtool_ops = &spider_net_ethtool_ops;
2227 * spider_net_setup_netdev - initialization of net_device
2228 * @card: card structure
2230 * Returns 0 on success or <0 on failure
2232 * spider_net_setup_netdev initializes the net_device structure
2235 spider_net_setup_netdev(struct spider_net_card *card)
2238 struct net_device *netdev = card->netdev;
2239 struct device_node *dn;
2240 struct sockaddr addr;
2243 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2245 pci_set_drvdata(card->pdev, netdev);
2247 timer_setup(&card->tx_timer, spider_net_cleanup_tx_ring, 0);
2248 netdev->irq = card->pdev->irq;
2250 card->aneg_count = 0;
2251 timer_setup(&card->aneg_timer, spider_net_link_phy, 0);
2253 netif_napi_add(netdev, &card->napi,
2254 spider_net_poll, SPIDER_NET_NAPI_WEIGHT);
2256 spider_net_setup_netdev_ops(netdev);
2258 netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2259 if (SPIDER_NET_RX_CSUM_DEFAULT)
2260 netdev->features |= NETIF_F_RXCSUM;
2261 netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX;
2262 /* some time: NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
2263 * NETIF_F_HW_VLAN_CTAG_FILTER */
2265 /* MTU range: 64 - 2294 */
2266 netdev->min_mtu = SPIDER_NET_MIN_MTU;
2267 netdev->max_mtu = SPIDER_NET_MAX_MTU;
2269 netdev->irq = card->pdev->irq;
2270 card->num_rx_ints = 0;
2271 card->ignore_rx_ramfull = 0;
2273 dn = pci_device_to_OF_node(card->pdev);
2277 mac = of_get_property(dn, "local-mac-address", NULL);
2280 memcpy(addr.sa_data, mac, ETH_ALEN);
2282 result = spider_net_set_mac(netdev, &addr);
2283 if ((result) && (netif_msg_probe(card)))
2284 dev_err(&card->netdev->dev,
2285 "Failed to set MAC address: %i\n", result);
2287 result = register_netdev(netdev);
2289 if (netif_msg_probe(card))
2290 dev_err(&card->netdev->dev,
2291 "Couldn't register net_device: %i\n", result);
2295 if (netif_msg_probe(card))
2296 pr_info("Initialized device %s.\n", netdev->name);
2302 * spider_net_alloc_card - allocates net_device and card structure
2304 * returns the card structure or NULL in case of errors
2306 * the card and net_device structures are linked to each other
2308 static struct spider_net_card *
2309 spider_net_alloc_card(void)
2311 struct net_device *netdev;
2312 struct spider_net_card *card;
2315 alloc_size = sizeof(struct spider_net_card) +
2316 (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr);
2317 netdev = alloc_etherdev(alloc_size);
2321 card = netdev_priv(netdev);
2322 card->netdev = netdev;
2323 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2324 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
2325 init_waitqueue_head(&card->waitq);
2326 atomic_set(&card->tx_timeout_task_counter, 0);
2328 card->rx_chain.num_desc = rx_descriptors;
2329 card->rx_chain.ring = card->darray;
2330 card->tx_chain.num_desc = tx_descriptors;
2331 card->tx_chain.ring = card->darray + rx_descriptors;
2337 * spider_net_undo_pci_setup - releases PCI ressources
2338 * @card: card structure
2340 * spider_net_undo_pci_setup releases the mapped regions
2343 spider_net_undo_pci_setup(struct spider_net_card *card)
2345 iounmap(card->regs);
2346 pci_release_regions(card->pdev);
2350 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2353 * Returns the card structure or NULL if any errors occur
2355 * spider_net_setup_pci_dev initializes pdev and together with the
2356 * functions called in spider_net_open configures the device so that
2357 * data can be transferred over it
2358 * The net_device structure is attached to the card structure, if the
2359 * function returns without error.
2361 static struct spider_net_card *
2362 spider_net_setup_pci_dev(struct pci_dev *pdev)
2364 struct spider_net_card *card;
2365 unsigned long mmio_start, mmio_len;
2367 if (pci_enable_device(pdev)) {
2368 dev_err(&pdev->dev, "Couldn't enable PCI device\n");
2372 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2374 "Couldn't find proper PCI device base address.\n");
2375 goto out_disable_dev;
2378 if (pci_request_regions(pdev, spider_net_driver_name)) {
2380 "Couldn't obtain PCI resources, aborting.\n");
2381 goto out_disable_dev;
2384 pci_set_master(pdev);
2386 card = spider_net_alloc_card();
2389 "Couldn't allocate net_device structure, aborting.\n");
2390 goto out_release_regions;
2394 /* fetch base address and length of first resource */
2395 mmio_start = pci_resource_start(pdev, 0);
2396 mmio_len = pci_resource_len(pdev, 0);
2398 card->netdev->mem_start = mmio_start;
2399 card->netdev->mem_end = mmio_start + mmio_len;
2400 card->regs = ioremap(mmio_start, mmio_len);
2404 "Couldn't obtain PCI resources, aborting.\n");
2405 goto out_release_regions;
2410 out_release_regions:
2411 pci_release_regions(pdev);
2413 pci_disable_device(pdev);
2418 * spider_net_probe - initialization of a device
2420 * @ent: entry in the device id list
2422 * Returns 0 on success, <0 on failure
2424 * spider_net_probe initializes pdev and registers a net_device
2425 * structure for it. After that, the device can be ifconfig'ed up
2428 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2431 struct spider_net_card *card;
2433 card = spider_net_setup_pci_dev(pdev);
2437 spider_net_workaround_rxramfull(card);
2438 spider_net_init_card(card);
2440 err = spider_net_setup_phy(card);
2444 err = spider_net_setup_netdev(card);
2451 spider_net_undo_pci_setup(card);
2452 free_netdev(card->netdev);
2458 * spider_net_remove - removal of a device
2461 * Returns 0 on success, <0 on failure
2463 * spider_net_remove is called to remove the device and unregisters the
2467 spider_net_remove(struct pci_dev *pdev)
2469 struct net_device *netdev;
2470 struct spider_net_card *card;
2472 netdev = pci_get_drvdata(pdev);
2473 card = netdev_priv(netdev);
2475 wait_event(card->waitq,
2476 atomic_read(&card->tx_timeout_task_counter) == 0);
2478 unregister_netdev(netdev);
2480 /* switch off card */
2481 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2482 SPIDER_NET_CKRCTRL_STOP_VALUE);
2483 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2484 SPIDER_NET_CKRCTRL_RUN_VALUE);
2486 spider_net_undo_pci_setup(card);
2487 free_netdev(netdev);
2490 static struct pci_driver spider_net_driver = {
2491 .name = spider_net_driver_name,
2492 .id_table = spider_net_pci_tbl,
2493 .probe = spider_net_probe,
2494 .remove = spider_net_remove
2498 * spider_net_init - init function when the driver is loaded
2500 * spider_net_init registers the device driver
2502 static int __init spider_net_init(void)
2504 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2506 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2507 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2508 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2510 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2511 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2512 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2514 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2515 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2516 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2518 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2519 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2520 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2523 return pci_register_driver(&spider_net_driver);
2527 * spider_net_cleanup - exit function when driver is unloaded
2529 * spider_net_cleanup unregisters the device driver
2531 static void __exit spider_net_cleanup(void)
2533 pci_unregister_driver(&spider_net_driver);
2536 module_init(spider_net_init);
2537 module_exit(spider_net_cleanup);