2 * Network device driver for Cell Processor-Based Blade
4 * (C) Copyright IBM Corp. 2005
6 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
7 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/compiler.h>
25 #include <linux/crc32.h>
26 #include <linux/delay.h>
27 #include <linux/etherdevice.h>
28 #include <linux/ethtool.h>
29 #include <linux/firmware.h>
30 #include <linux/if_vlan.h>
32 #include <linux/init.h>
33 #include <linux/ioport.h>
35 #include <linux/kernel.h>
36 #include <linux/mii.h>
37 #include <linux/module.h>
38 #include <linux/netdevice.h>
39 #include <linux/device.h>
40 #include <linux/pci.h>
41 #include <linux/skbuff.h>
42 #include <linux/slab.h>
43 #include <linux/tcp.h>
44 #include <linux/types.h>
45 #include <linux/vmalloc.h>
46 #include <linux/wait.h>
47 #include <linux/workqueue.h>
48 #include <asm/bitops.h>
49 #include <asm/pci-bridge.h>
50 #include <net/checksum.h>
52 #include "spider_net.h"
54 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
55 "<Jens.Osterkamp@de.ibm.com>");
56 MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
57 MODULE_LICENSE("GPL");
58 MODULE_VERSION(VERSION);
60 static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
61 static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
63 module_param(rx_descriptors, int, 0444);
64 module_param(tx_descriptors, int, 0444);
66 MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
68 MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
71 char spider_net_driver_name[] = "spidernet";
73 static struct pci_device_id spider_net_pci_tbl[] = {
74 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
75 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
79 MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
82 * spider_net_read_reg - reads an SMMIO register of a card
83 * @card: device structure
84 * @reg: register to read from
86 * returns the content of the specified SMMIO register.
89 spider_net_read_reg(struct spider_net_card *card, u32 reg)
91 /* We use the powerpc specific variants instead of readl_be() because
92 * we know spidernet is not a real PCI device and we can thus avoid the
93 * performance hit caused by the PCI workarounds.
95 return in_be32(card->regs + reg);
99 * spider_net_write_reg - writes to an SMMIO register of a card
100 * @card: device structure
101 * @reg: register to write to
102 * @value: value to write into the specified SMMIO register
105 spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
107 /* We use the powerpc specific variants instead of writel_be() because
108 * we know spidernet is not a real PCI device and we can thus avoid the
109 * performance hit caused by the PCI workarounds.
111 out_be32(card->regs + reg, value);
114 /** spider_net_write_phy - write to phy register
115 * @netdev: adapter to be written to
118 * @val: value to be written to phy register
120 * spider_net_write_phy_register writes to an arbitrary PHY
121 * register via the spider GPCWOPCMD register. We assume the queue does
122 * not run full (not more than 15 commands outstanding).
125 spider_net_write_phy(struct net_device *netdev, int mii_id,
128 struct spider_net_card *card = netdev_priv(netdev);
131 writevalue = ((u32)mii_id << 21) |
132 ((u32)reg << 16) | ((u32)val);
134 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
137 /** spider_net_read_phy - read from phy register
138 * @netdev: network device to be read from
142 * Returns value read from PHY register
144 * spider_net_write_phy reads from an arbitrary PHY
145 * register via the spider GPCROPCMD register
148 spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
150 struct spider_net_card *card = netdev_priv(netdev);
153 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
154 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
156 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
157 * interrupt, as we poll for the completion of the read operation
158 * in spider_net_read_phy. Should take about 50 us */
160 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
161 } while (readvalue & SPIDER_NET_GPREXEC);
163 readvalue &= SPIDER_NET_GPRDAT_MASK;
169 * spider_net_setup_aneg - initial auto-negotiation setup
170 * @card: device structure
173 spider_net_setup_aneg(struct spider_net_card *card)
175 struct mii_phy *phy = &card->phy;
177 u16 bmcr, bmsr, stat1000, estat;
179 bmcr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMCR);
180 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
181 stat1000 = spider_net_read_phy(card->netdev, phy->mii_id, MII_STAT1000);
182 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
184 if (bmsr & BMSR_10HALF)
185 advertise |= ADVERTISED_10baseT_Half;
186 if (bmsr & BMSR_10FULL)
187 advertise |= ADVERTISED_10baseT_Full;
188 if (bmsr & BMSR_100HALF)
189 advertise |= ADVERTISED_100baseT_Half;
190 if (bmsr & BMSR_100FULL)
191 advertise |= ADVERTISED_100baseT_Full;
193 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
194 advertise |= SUPPORTED_1000baseT_Full;
195 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
196 advertise |= SUPPORTED_1000baseT_Half;
198 mii_phy_probe(phy, phy->mii_id);
199 phy->def->ops->setup_aneg(phy, advertise);
204 * spider_net_rx_irq_off - switch off rx irq on this spider card
205 * @card: device structure
207 * switches off rx irq by masking them out in the GHIINTnMSK register
210 spider_net_rx_irq_off(struct spider_net_card *card)
214 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
215 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
219 * spider_net_rx_irq_on - switch on rx irq on this spider card
220 * @card: device structure
222 * switches on rx irq by enabling them in the GHIINTnMSK register
225 spider_net_rx_irq_on(struct spider_net_card *card)
229 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
230 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
234 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
235 * @card: card structure
237 * spider_net_set_promisc sets the unicast destination address filter and
238 * thus either allows for non-promisc mode or promisc mode
241 spider_net_set_promisc(struct spider_net_card *card)
244 struct net_device *netdev = card->netdev;
246 if (netdev->flags & IFF_PROMISC) {
247 /* clear destination entry 0 */
248 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
249 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
250 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
251 SPIDER_NET_PROMISC_VALUE);
253 macu = netdev->dev_addr[0];
255 macu |= netdev->dev_addr[1];
256 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
258 macu |= SPIDER_NET_UA_DESCR_VALUE;
259 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
260 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
261 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
262 SPIDER_NET_NONPROMISC_VALUE);
267 * spider_net_get_mac_address - read mac address from spider card
268 * @card: device structure
270 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
273 spider_net_get_mac_address(struct net_device *netdev)
275 struct spider_net_card *card = netdev_priv(netdev);
278 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
279 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
281 netdev->dev_addr[0] = (macu >> 24) & 0xff;
282 netdev->dev_addr[1] = (macu >> 16) & 0xff;
283 netdev->dev_addr[2] = (macu >> 8) & 0xff;
284 netdev->dev_addr[3] = macu & 0xff;
285 netdev->dev_addr[4] = (macl >> 8) & 0xff;
286 netdev->dev_addr[5] = macl & 0xff;
288 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
295 * spider_net_get_descr_status -- returns the status of a descriptor
296 * @descr: descriptor to look at
298 * returns the status as in the dmac_cmd_status field of the descriptor
301 spider_net_get_descr_status(struct spider_net_descr *descr)
303 return descr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
307 * spider_net_free_chain - free descriptor chain
308 * @card: card structure
309 * @chain: address of chain
313 spider_net_free_chain(struct spider_net_card *card,
314 struct spider_net_descr_chain *chain)
316 struct spider_net_descr *descr;
321 descr->next_descr_addr = 0;
323 } while (descr != chain->ring);
325 dma_free_coherent(&card->pdev->dev, chain->num_desc,
326 chain->ring, chain->dma_addr);
330 * spider_net_init_chain - alloc and link descriptor chain
331 * @card: card structure
332 * @chain: address of chain
334 * We manage a circular list that mirrors the hardware structure,
335 * except that the hardware uses bus addresses.
337 * Returns 0 on success, <0 on failure
340 spider_net_init_chain(struct spider_net_card *card,
341 struct spider_net_descr_chain *chain)
344 struct spider_net_descr *descr;
348 alloc_size = chain->num_desc * sizeof (struct spider_net_descr);
350 chain->ring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
351 &chain->dma_addr, GFP_KERNEL);
357 memset(descr, 0, alloc_size);
359 /* Set up the hardware pointers in each descriptor */
360 buf = chain->dma_addr;
361 for (i=0; i < chain->num_desc; i++, descr++) {
362 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
364 descr->bus_addr = buf;
365 descr->next_descr_addr = 0;
366 descr->next = descr + 1;
367 descr->prev = descr - 1;
369 buf += sizeof(struct spider_net_descr);
371 /* do actual circular list */
372 (descr-1)->next = chain->ring;
373 chain->ring->prev = descr-1;
375 spin_lock_init(&chain->lock);
376 chain->head = chain->ring;
377 chain->tail = chain->ring;
382 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
383 * @card: card structure
385 * returns 0 on success, <0 on failure
388 spider_net_free_rx_chain_contents(struct spider_net_card *card)
390 struct spider_net_descr *descr;
392 descr = card->rx_chain.head;
395 dev_kfree_skb(descr->skb);
396 pci_unmap_single(card->pdev, descr->buf_addr,
397 SPIDER_NET_MAX_FRAME,
398 PCI_DMA_BIDIRECTIONAL);
401 } while (descr != card->rx_chain.head);
405 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
406 * @card: card structure
407 * @descr: descriptor to re-init
409 * Return 0 on succes, <0 on failure.
411 * Allocates a new rx skb, iommu-maps it and attaches it to the
412 * descriptor. Mark the descriptor as activated, ready-to-use.
415 spider_net_prepare_rx_descr(struct spider_net_card *card,
416 struct spider_net_descr *descr)
422 /* we need to round up the buffer size to a multiple of 128 */
423 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
424 (~(SPIDER_NET_RXBUF_ALIGN - 1));
426 /* and we need to have it 128 byte aligned, therefore we allocate a
428 /* allocate an skb */
429 descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
431 if (netif_msg_rx_err(card) && net_ratelimit())
432 pr_err("Not enough memory to allocate rx buffer\n");
433 card->spider_stats.alloc_rx_skb_error++;
436 descr->buf_size = bufsize;
437 descr->result_size = 0;
438 descr->valid_size = 0;
439 descr->data_status = 0;
440 descr->data_error = 0;
442 offset = ((unsigned long)descr->skb->data) &
443 (SPIDER_NET_RXBUF_ALIGN - 1);
445 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
446 /* iommu-map the skb */
447 buf = pci_map_single(card->pdev, descr->skb->data,
448 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
449 descr->buf_addr = buf;
450 if (pci_dma_mapping_error(buf)) {
451 dev_kfree_skb_any(descr->skb);
452 if (netif_msg_rx_err(card) && net_ratelimit())
453 pr_err("Could not iommu-map rx buffer\n");
454 card->spider_stats.rx_iommu_map_error++;
455 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
457 descr->next_descr_addr = 0;
459 descr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
460 SPIDER_NET_DMAC_NOINTR_COMPLETE;
463 descr->prev->next_descr_addr = descr->bus_addr;
470 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
471 * @card: card structure
473 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
474 * chip by writing to the appropriate register. DMA is enabled in
475 * spider_net_enable_rxdmac.
478 spider_net_enable_rxchtails(struct spider_net_card *card)
480 /* assume chain is aligned correctly */
481 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
482 card->rx_chain.tail->bus_addr);
486 * spider_net_enable_rxdmac - enables a receive DMA controller
487 * @card: card structure
489 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
490 * in the GDADMACCNTR register
493 spider_net_enable_rxdmac(struct spider_net_card *card)
496 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
497 SPIDER_NET_DMA_RX_VALUE);
501 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
502 * @card: card structure
504 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
507 spider_net_refill_rx_chain(struct spider_net_card *card)
509 struct spider_net_descr_chain *chain = &card->rx_chain;
512 /* one context doing the refill (and a second context seeing that
513 * and omitting it) is ok. If called by NAPI, we'll be called again
514 * as spider_net_decode_one_descr is called several times. If some
515 * interrupt calls us, the NAPI is about to clean up anyway. */
516 if (!spin_trylock_irqsave(&chain->lock, flags))
519 while (spider_net_get_descr_status(chain->head) ==
520 SPIDER_NET_DESCR_NOT_IN_USE) {
521 if (spider_net_prepare_rx_descr(card, chain->head))
523 chain->head = chain->head->next;
526 spin_unlock_irqrestore(&chain->lock, flags);
530 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
531 * @card: card structure
533 * Returns 0 on success, <0 on failure.
536 spider_net_alloc_rx_skbs(struct spider_net_card *card)
539 struct spider_net_descr_chain *chain;
543 chain = &card->rx_chain;
544 /* Put at least one buffer into the chain. if this fails,
545 * we've got a problem. If not, spider_net_refill_rx_chain
546 * will do the rest at the end of this function. */
547 if (spider_net_prepare_rx_descr(card, chain->head))
550 chain->head = chain->head->next;
552 /* This will allocate the rest of the rx buffers;
553 * if not, it's business as usual later on. */
554 spider_net_refill_rx_chain(card);
555 spider_net_enable_rxdmac(card);
559 spider_net_free_rx_chain_contents(card);
564 * spider_net_get_multicast_hash - generates hash for multicast filter table
565 * @addr: multicast address
567 * returns the hash value.
569 * spider_net_get_multicast_hash calculates a hash value for a given multicast
570 * address, that is used to set the multicast filter tables
573 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
577 char addr_for_crc[ETH_ALEN] = { 0, };
580 for (i = 0; i < ETH_ALEN * 8; i++) {
581 bit = (addr[i / 8] >> (i % 8)) & 1;
582 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
585 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
596 * spider_net_set_multi - sets multicast addresses and promisc flags
597 * @netdev: interface device structure
599 * spider_net_set_multi configures multicast addresses as needed for the
600 * netdev interface. It also sets up multicast, allmulti and promisc
601 * flags appropriately
604 spider_net_set_multi(struct net_device *netdev)
606 struct dev_mc_list *mc;
610 struct spider_net_card *card = netdev_priv(netdev);
611 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
614 spider_net_set_promisc(card);
616 if (netdev->flags & IFF_ALLMULTI) {
617 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
623 /* well, we know, what the broadcast hash value is: it's xfd
624 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
625 set_bit(0xfd, bitmask);
627 for (mc = netdev->mc_list; mc; mc = mc->next) {
628 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
629 set_bit(hash, bitmask);
633 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
635 if (test_bit(i * 4, bitmask))
638 if (test_bit(i * 4 + 1, bitmask))
641 if (test_bit(i * 4 + 2, bitmask))
644 if (test_bit(i * 4 + 3, bitmask))
647 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
652 * spider_net_disable_rxdmac - disables the receive DMA controller
653 * @card: card structure
655 * spider_net_disable_rxdmac terminates processing on the DMA controller by
656 * turing off DMA and issueing a force end
659 spider_net_disable_rxdmac(struct spider_net_card *card)
661 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
662 SPIDER_NET_DMA_RX_FEND_VALUE);
666 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
667 * @card: card structure
668 * @descr: descriptor structure to fill out
669 * @skb: packet to use
671 * returns 0 on success, <0 on failure.
673 * fills out the descriptor structure with skb data and len. Copies data,
674 * if needed (32bit DMA!)
677 spider_net_prepare_tx_descr(struct spider_net_card *card,
680 struct spider_net_descr *descr;
684 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
685 if (pci_dma_mapping_error(buf)) {
686 if (netif_msg_tx_err(card) && net_ratelimit())
687 pr_err("could not iommu-map packet (%p, %i). "
688 "Dropping packet\n", skb->data, skb->len);
689 card->spider_stats.tx_iommu_map_error++;
693 spin_lock_irqsave(&card->tx_chain.lock, flags);
694 descr = card->tx_chain.head;
695 card->tx_chain.head = descr->next;
697 descr->buf_addr = buf;
698 descr->buf_size = skb->len;
699 descr->next_descr_addr = 0;
701 descr->data_status = 0;
703 descr->dmac_cmd_status =
704 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
705 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
707 if (skb->protocol == htons(ETH_P_IP))
708 switch (skb->nh.iph->protocol) {
710 descr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
713 descr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
717 /* Chain the bus address, so that the DMA engine finds this descr. */
718 descr->prev->next_descr_addr = descr->bus_addr;
720 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
725 spider_net_set_low_watermark(struct spider_net_card *card)
731 struct spider_net_descr *descr = card->tx_chain.tail;
733 /* Measure the length of the queue. Measurement does not
734 * need to be precise -- does not need a lock. */
735 while (descr != card->tx_chain.head) {
736 status = descr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
737 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
743 /* If TX queue is short, don't even bother with interrupts */
744 if (cnt < card->tx_chain.num_desc/4)
747 /* Set low-watermark 3/4th's of the way into the queue. */
748 descr = card->tx_chain.tail;
753 /* Set the new watermark, clear the old watermark */
754 spin_lock_irqsave(&card->tx_chain.lock, flags);
755 descr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
756 if (card->low_watermark && card->low_watermark != descr)
757 card->low_watermark->dmac_cmd_status =
758 card->low_watermark->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
759 card->low_watermark = descr;
760 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
765 * spider_net_release_tx_chain - processes sent tx descriptors
766 * @card: adapter structure
767 * @brutal: if set, don't care about whether descriptor seems to be in use
769 * returns 0 if the tx ring is empty, otherwise 1.
771 * spider_net_release_tx_chain releases the tx descriptors that spider has
772 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
773 * If some other context is calling this function, we return 1 so that we're
774 * scheduled again (if we were scheduled) and will not loose initiative.
777 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
779 struct spider_net_descr_chain *chain = &card->tx_chain;
780 struct spider_net_descr *descr;
786 while (chain->tail != chain->head) {
787 spin_lock_irqsave(&chain->lock, flags);
790 status = spider_net_get_descr_status(descr);
792 case SPIDER_NET_DESCR_COMPLETE:
793 card->netdev_stats.tx_packets++;
794 card->netdev_stats.tx_bytes += descr->skb->len;
797 case SPIDER_NET_DESCR_CARDOWNED:
799 spin_unlock_irqrestore(&chain->lock, flags);
803 /* fallthrough, if we release the descriptors
804 * brutally (then we don't care about
805 * SPIDER_NET_DESCR_CARDOWNED) */
807 case SPIDER_NET_DESCR_RESPONSE_ERROR:
808 case SPIDER_NET_DESCR_PROTECTION_ERROR:
809 case SPIDER_NET_DESCR_FORCE_END:
810 if (netif_msg_tx_err(card))
811 pr_err("%s: forcing end of tx descriptor "
812 "with status x%02x\n",
813 card->netdev->name, status);
814 card->netdev_stats.tx_errors++;
818 card->netdev_stats.tx_dropped++;
820 spin_unlock_irqrestore(&chain->lock, flags);
825 chain->tail = descr->next;
826 descr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
828 buf_addr = descr->buf_addr;
829 spin_unlock_irqrestore(&chain->lock, flags);
833 pci_unmap_single(card->pdev, buf_addr, skb->len,
842 * spider_net_kick_tx_dma - enables TX DMA processing
843 * @card: card structure
844 * @descr: descriptor address to enable TX processing at
846 * This routine will start the transmit DMA running if
847 * it is not already running. This routine ned only be
848 * called when queueing a new packet to an empty tx queue.
849 * Writes the current tx chain head as start address
850 * of the tx descriptor chain and enables the transmission
854 spider_net_kick_tx_dma(struct spider_net_card *card)
856 struct spider_net_descr *descr;
858 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
859 SPIDER_NET_TX_DMA_EN)
862 descr = card->tx_chain.tail;
864 if (spider_net_get_descr_status(descr) ==
865 SPIDER_NET_DESCR_CARDOWNED) {
866 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
868 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
869 SPIDER_NET_DMA_TX_VALUE);
872 if (descr == card->tx_chain.head)
878 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
882 * spider_net_xmit - transmits a frame over the device
883 * @skb: packet to send out
884 * @netdev: interface device structure
886 * returns 0 on success, !0 on failure
889 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
892 struct spider_net_card *card = netdev_priv(netdev);
893 struct spider_net_descr_chain *chain = &card->tx_chain;
895 spider_net_release_tx_chain(card, 0);
897 if ((chain->head->next == chain->tail->prev) ||
898 (spider_net_prepare_tx_descr(card, skb) != 0)) {
900 card->netdev_stats.tx_dropped++;
901 netif_stop_queue(netdev);
902 return NETDEV_TX_BUSY;
905 cnt = spider_net_set_low_watermark(card);
907 spider_net_kick_tx_dma(card);
912 * spider_net_cleanup_tx_ring - cleans up the TX ring
913 * @card: card structure
915 * spider_net_cleanup_tx_ring is called by either the tx_timer
916 * or from the NAPI polling routine.
917 * This routine releases resources associted with transmitted
918 * packets, including updating the queue tail pointer.
921 spider_net_cleanup_tx_ring(struct spider_net_card *card)
923 if ((spider_net_release_tx_chain(card, 0) != 0) &&
924 (card->netdev->flags & IFF_UP)) {
925 spider_net_kick_tx_dma(card);
926 netif_wake_queue(card->netdev);
931 * spider_net_do_ioctl - called for device ioctls
932 * @netdev: interface device structure
933 * @ifr: request parameter structure for ioctl
934 * @cmd: command code for ioctl
936 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
937 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
940 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
949 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
950 * @descr: descriptor to process
951 * @card: card structure
953 * Fills out skb structure and passes the data to the stack.
954 * The descriptor state is not changed.
957 spider_net_pass_skb_up(struct spider_net_descr *descr,
958 struct spider_net_card *card)
961 struct net_device *netdev;
962 u32 data_status, data_error;
964 data_status = descr->data_status;
965 data_error = descr->data_error;
966 netdev = card->netdev;
970 skb_put(skb, descr->valid_size);
972 /* the card seems to add 2 bytes of junk in front
973 * of the ethernet frame */
974 #define SPIDER_MISALIGN 2
975 skb_pull(skb, SPIDER_MISALIGN);
976 skb->protocol = eth_type_trans(skb, netdev);
978 /* checksum offload */
979 if (card->options.rx_csum) {
980 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
981 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
982 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
983 skb->ip_summed = CHECKSUM_UNNECESSARY;
985 skb->ip_summed = CHECKSUM_NONE;
987 skb->ip_summed = CHECKSUM_NONE;
989 if (data_status & SPIDER_NET_VLAN_PACKET) {
990 /* further enhancements: HW-accel VLAN
991 * vlan_hwaccel_receive_skb
995 /* pass skb up to stack */
996 netif_receive_skb(skb);
998 /* update netdevice statistics */
999 card->netdev_stats.rx_packets++;
1000 card->netdev_stats.rx_bytes += skb->len;
1004 static void show_rx_chain(struct spider_net_card *card)
1006 struct spider_net_descr_chain *chain = &card->rx_chain;
1007 struct spider_net_descr *start= chain->tail;
1008 struct spider_net_descr *descr= start;
1012 int cstat = spider_net_get_descr_status(descr);
1013 printk(KERN_INFO "RX chain tail at descr=%ld\n",
1014 (start - card->descr) - card->tx_chain.num_desc);
1018 status = spider_net_get_descr_status(descr);
1019 if (cstat != status) {
1020 printk(KERN_INFO "Have %d descrs with stat=x%08x\n", cnt, cstat);
1025 descr = descr->next;
1026 } while (descr != start);
1027 printk(KERN_INFO "Last %d descrs with stat=x%08x\n", cnt, cstat);
1032 * spider_net_decode_one_descr - processes an rx descriptor
1033 * @card: card structure
1035 * Returns 1 if a packet has been sent to the stack, otherwise 0
1037 * Processes an rx descriptor by iommu-unmapping the data buffer and passing
1038 * the packet up to the stack. This function is called in softirq
1039 * context, e.g. either bottom half from interrupt or NAPI polling context
1042 spider_net_decode_one_descr(struct spider_net_card *card)
1044 struct spider_net_descr_chain *chain = &card->rx_chain;
1045 struct spider_net_descr *descr = chain->tail;
1048 status = spider_net_get_descr_status(descr);
1050 /* Nothing in the descriptor, or ring must be empty */
1051 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1052 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1055 /* descriptor definitively used -- move on tail */
1056 chain->tail = descr->next;
1058 /* unmap descriptor */
1059 pci_unmap_single(card->pdev, descr->buf_addr,
1060 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1062 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1063 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1064 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1065 if (netif_msg_rx_err(card))
1066 pr_err("%s: dropping RX descriptor with state %d\n",
1067 card->netdev->name, status);
1068 card->netdev_stats.rx_dropped++;
1072 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1073 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1074 if (netif_msg_rx_err(card))
1075 pr_err("%s: RX descriptor with unkown state %d\n",
1076 card->netdev->name, status);
1077 card->spider_stats.rx_desc_unk_state++;
1081 /* The cases we'll throw away the packet immediately */
1082 if (descr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
1083 if (netif_msg_rx_err(card))
1084 pr_err("%s: error in received descriptor found, "
1085 "data_status=x%08x, data_error=x%08x\n",
1087 descr->data_status, descr->data_error);
1091 if (descr->dmac_cmd_status & 0xfefe) {
1092 pr_err("%s: bad status, cmd_status=x%08x\n",
1094 descr->dmac_cmd_status);
1095 pr_err("buf_addr=x%08x\n", descr->buf_addr);
1096 pr_err("buf_size=x%08x\n", descr->buf_size);
1097 pr_err("next_descr_addr=x%08x\n", descr->next_descr_addr);
1098 pr_err("result_size=x%08x\n", descr->result_size);
1099 pr_err("valid_size=x%08x\n", descr->valid_size);
1100 pr_err("data_status=x%08x\n", descr->data_status);
1101 pr_err("data_error=x%08x\n", descr->data_error);
1102 pr_err("bus_addr=x%08x\n", descr->bus_addr);
1103 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1105 card->spider_stats.rx_desc_error++;
1109 /* Ok, we've got a packet in descr */
1110 spider_net_pass_skb_up(descr, card);
1111 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1115 dev_kfree_skb_irq(descr->skb);
1116 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1121 * spider_net_poll - NAPI poll function called by the stack to return packets
1122 * @netdev: interface device structure
1123 * @budget: number of packets we can pass to the stack at most
1125 * returns 0 if no more packets available to the driver/stack. Returns 1,
1126 * if the quota is exceeded, but the driver has still packets.
1128 * spider_net_poll returns all packets from the rx descriptors to the stack
1129 * (using netif_receive_skb). If all/enough packets are up, the driver
1130 * reenables interrupts and returns 0. If not, 1 is returned.
1133 spider_net_poll(struct net_device *netdev, int *budget)
1135 struct spider_net_card *card = netdev_priv(netdev);
1136 int packets_to_do, packets_done = 0;
1137 int no_more_packets = 0;
1139 spider_net_cleanup_tx_ring(card);
1140 packets_to_do = min(*budget, netdev->quota);
1142 while (packets_to_do) {
1143 if (spider_net_decode_one_descr(card)) {
1147 /* no more packets for the stack */
1148 no_more_packets = 1;
1153 netdev->quota -= packets_done;
1154 *budget -= packets_done;
1155 spider_net_refill_rx_chain(card);
1156 spider_net_enable_rxdmac(card);
1158 /* if all packets are in the stack, enable interrupts and return 0 */
1159 /* if not, return 1 */
1160 if (no_more_packets) {
1161 netif_rx_complete(netdev);
1162 spider_net_rx_irq_on(card);
1170 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1171 * @netdev: interface device structure
1172 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1175 spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1177 /* further enhancement... yet to do */
1182 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1183 * @netdev: interface device structure
1184 * @vid: VLAN id to add
1187 spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1189 /* further enhancement... yet to do */
1190 /* add vid to card's VLAN filter table */
1195 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1196 * @netdev: interface device structure
1197 * @vid: VLAN id to remove
1200 spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1202 /* further enhancement... yet to do */
1203 /* remove vid from card's VLAN filter table */
1207 * spider_net_get_stats - get interface statistics
1208 * @netdev: interface device structure
1210 * returns the interface statistics residing in the spider_net_card struct
1212 static struct net_device_stats *
1213 spider_net_get_stats(struct net_device *netdev)
1215 struct spider_net_card *card = netdev_priv(netdev);
1216 struct net_device_stats *stats = &card->netdev_stats;
1221 * spider_net_change_mtu - changes the MTU of an interface
1222 * @netdev: interface device structure
1223 * @new_mtu: new MTU value
1225 * returns 0 on success, <0 on failure
1228 spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1230 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1231 * and mtu is outbound only anyway */
1232 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1233 (new_mtu > SPIDER_NET_MAX_MTU) )
1235 netdev->mtu = new_mtu;
1240 * spider_net_set_mac - sets the MAC of an interface
1241 * @netdev: interface device structure
1242 * @ptr: pointer to new MAC address
1244 * Returns 0 on success, <0 on failure. Currently, we don't support this
1245 * and will always return EOPNOTSUPP.
1248 spider_net_set_mac(struct net_device *netdev, void *p)
1250 struct spider_net_card *card = netdev_priv(netdev);
1251 u32 macl, macu, regvalue;
1252 struct sockaddr *addr = p;
1254 if (!is_valid_ether_addr(addr->sa_data))
1255 return -EADDRNOTAVAIL;
1257 /* switch off GMACTPE and GMACRPE */
1258 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1259 regvalue &= ~((1 << 5) | (1 << 6));
1260 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1263 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1264 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1265 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1266 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1267 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1269 /* switch GMACTPE and GMACRPE back on */
1270 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1271 regvalue |= ((1 << 5) | (1 << 6));
1272 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1274 spider_net_set_promisc(card);
1276 /* look up, whether we have been successful */
1277 if (spider_net_get_mac_address(netdev))
1278 return -EADDRNOTAVAIL;
1279 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1280 return -EADDRNOTAVAIL;
1286 * spider_net_link_reset
1287 * @netdev: net device structure
1289 * This is called when the PHY_LINK signal is asserted. For the blade this is
1290 * not connected so we should never get here.
1294 spider_net_link_reset(struct net_device *netdev)
1297 struct spider_net_card *card = netdev_priv(netdev);
1299 del_timer_sync(&card->aneg_timer);
1301 /* clear interrupt, block further interrupts */
1302 spider_net_write_reg(card, SPIDER_NET_GMACST,
1303 spider_net_read_reg(card, SPIDER_NET_GMACST));
1304 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1306 /* reset phy and setup aneg */
1307 spider_net_setup_aneg(card);
1308 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1313 * spider_net_handle_error_irq - handles errors raised by an interrupt
1314 * @card: card structure
1315 * @status_reg: interrupt status register 0 (GHIINT0STS)
1317 * spider_net_handle_error_irq treats or ignores all error conditions
1318 * found when an interrupt is presented
1321 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1323 u32 error_reg1, error_reg2;
1327 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1328 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1330 /* check GHIINT0STS ************************************/
1332 for (i = 0; i < 32; i++)
1333 if (status_reg & (1<<i))
1336 /* let error_reg1 and error_reg2 evaluation decide, what to do
1337 case SPIDER_NET_PHYINT:
1338 case SPIDER_NET_GMAC2INT:
1339 case SPIDER_NET_GMAC1INT:
1340 case SPIDER_NET_GFIFOINT:
1341 case SPIDER_NET_DMACINT:
1342 case SPIDER_NET_GSYSINT:
1345 case SPIDER_NET_GIPSINT:
1349 case SPIDER_NET_GPWOPCMPINT:
1350 /* PHY write operation completed */
1353 case SPIDER_NET_GPROPCMPINT:
1354 /* PHY read operation completed */
1355 /* we don't use semaphores, as we poll for the completion
1356 * of the read operation in spider_net_read_phy. Should take
1360 case SPIDER_NET_GPWFFINT:
1361 /* PHY command queue full */
1362 if (netif_msg_intr(card))
1363 pr_err("PHY write queue full\n");
1367 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1368 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1369 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1371 case SPIDER_NET_GDTDEN0INT:
1372 /* someone has set TX_DMA_EN to 0 */
1376 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1377 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1378 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1379 case SPIDER_NET_GDADEN0INT:
1380 /* someone has set RX_DMA_EN to 0 */
1385 case SPIDER_NET_GDDFDCINT:
1386 case SPIDER_NET_GDCFDCINT:
1387 case SPIDER_NET_GDBFDCINT:
1388 case SPIDER_NET_GDAFDCINT:
1389 /* case SPIDER_NET_GDNMINT: not used. print a message */
1390 /* case SPIDER_NET_GCNMINT: not used. print a message */
1391 /* case SPIDER_NET_GBNMINT: not used. print a message */
1392 /* case SPIDER_NET_GANMINT: not used. print a message */
1393 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1398 case SPIDER_NET_GDTFDCINT:
1401 case SPIDER_NET_GTTEDINT:
1404 case SPIDER_NET_GDTDCEINT:
1405 /* chain end. If a descriptor should be sent, kick off
1407 if (card->tx_chain.tail != card->tx_chain.head)
1408 spider_net_kick_tx_dma(card);
1413 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1414 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1417 /* check GHIINT1STS ************************************/
1419 for (i = 0; i < 32; i++)
1420 if (error_reg1 & (1<<i))
1423 case SPIDER_NET_GTMFLLINT:
1424 if (netif_msg_intr(card) && net_ratelimit())
1425 pr_err("Spider TX RAM full\n");
1428 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1429 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1430 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1431 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1432 case SPIDER_NET_GRMFLLINT:
1433 if (netif_msg_intr(card) && net_ratelimit())
1434 pr_err("Spider RX RAM full, incoming packets "
1435 "might be discarded!\n");
1436 spider_net_rx_irq_off(card);
1437 netif_rx_schedule(card->netdev);
1441 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1442 case SPIDER_NET_GDTINVDINT:
1443 /* allrighty. tx from previous descr ok */
1448 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1449 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1450 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1451 case SPIDER_NET_GDADCEINT:
1452 if (netif_msg_intr(card) && net_ratelimit())
1453 pr_err("got descriptor chain end interrupt, "
1454 "restarting DMAC %c.\n",
1455 'D'-(i-SPIDER_NET_GDDDCEINT)/3);
1456 spider_net_refill_rx_chain(card);
1457 spider_net_enable_rxdmac(card);
1461 /* invalid descriptor */
1462 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1463 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1464 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1465 case SPIDER_NET_GDAINVDINT:
1466 /* could happen when rx chain is full */
1467 spider_net_refill_rx_chain(card);
1468 spider_net_enable_rxdmac(card);
1472 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1473 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1474 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1475 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1476 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1477 /* case SPIDER_NET_GDSERINT: problem, print a message */
1478 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1479 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1480 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1481 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1482 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1488 /* check GHIINT2STS ************************************/
1490 for (i = 0; i < 32; i++)
1491 if (error_reg2 & (1<<i))
1494 /* there is nothing we can (want to) do at this time. Log a
1495 * message, we can switch on and off the specific values later on
1496 case SPIDER_NET_GPROPERINT:
1497 case SPIDER_NET_GMCTCRSNGINT:
1498 case SPIDER_NET_GMCTLCOLINT:
1499 case SPIDER_NET_GMCTTMOTINT:
1500 case SPIDER_NET_GMCRCAERINT:
1501 case SPIDER_NET_GMCRCALERINT:
1502 case SPIDER_NET_GMCRALNERINT:
1503 case SPIDER_NET_GMCROVRINT:
1504 case SPIDER_NET_GMCRRNTINT:
1505 case SPIDER_NET_GMCRRXERINT:
1506 case SPIDER_NET_GTITCSERINT:
1507 case SPIDER_NET_GTIFMTERINT:
1508 case SPIDER_NET_GTIPKTRVKINT:
1509 case SPIDER_NET_GTISPINGINT:
1510 case SPIDER_NET_GTISADNGINT:
1511 case SPIDER_NET_GTISPDNGINT:
1512 case SPIDER_NET_GRIFMTERINT:
1513 case SPIDER_NET_GRIPKTRVKINT:
1514 case SPIDER_NET_GRISPINGINT:
1515 case SPIDER_NET_GRISADNGINT:
1516 case SPIDER_NET_GRISPDNGINT:
1523 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
1524 pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, "
1525 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1527 status_reg, error_reg1, error_reg2);
1529 /* clear interrupt sources */
1530 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1531 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1535 * spider_net_interrupt - interrupt handler for spider_net
1536 * @irq: interupt number
1537 * @ptr: pointer to net_device
1538 * @regs: PU registers
1540 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1541 * interrupt found raised by card.
1543 * This is the interrupt handler, that turns off
1544 * interrupts for this device and makes the stack poll the driver
1547 spider_net_interrupt(int irq, void *ptr)
1549 struct net_device *netdev = ptr;
1550 struct spider_net_card *card = netdev_priv(netdev);
1553 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1558 if (status_reg & SPIDER_NET_RXINT ) {
1559 spider_net_rx_irq_off(card);
1560 netif_rx_schedule(netdev);
1562 if (status_reg & SPIDER_NET_TXINT)
1563 netif_rx_schedule(netdev);
1565 if (status_reg & SPIDER_NET_LINKINT)
1566 spider_net_link_reset(netdev);
1568 if (status_reg & SPIDER_NET_ERRINT )
1569 spider_net_handle_error_irq(card, status_reg);
1571 /* clear interrupt sources */
1572 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1577 #ifdef CONFIG_NET_POLL_CONTROLLER
1579 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1580 * @netdev: interface device structure
1582 * see Documentation/networking/netconsole.txt
1585 spider_net_poll_controller(struct net_device *netdev)
1587 disable_irq(netdev->irq);
1588 spider_net_interrupt(netdev->irq, netdev);
1589 enable_irq(netdev->irq);
1591 #endif /* CONFIG_NET_POLL_CONTROLLER */
1594 * spider_net_init_card - initializes the card
1595 * @card: card structure
1597 * spider_net_init_card initializes the card so that other registers can
1601 spider_net_init_card(struct spider_net_card *card)
1603 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1604 SPIDER_NET_CKRCTRL_STOP_VALUE);
1606 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1607 SPIDER_NET_CKRCTRL_RUN_VALUE);
1611 * spider_net_enable_card - enables the card by setting all kinds of regs
1612 * @card: card structure
1614 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1617 spider_net_enable_card(struct spider_net_card *card)
1620 /* the following array consists of (register),(value) pairs
1621 * that are set in this function. A register of 0 ends the list */
1623 { SPIDER_NET_GRESUMINTNUM, 0 },
1624 { SPIDER_NET_GREINTNUM, 0 },
1626 /* set interrupt frame number registers */
1627 /* clear the single DMA engine registers first */
1628 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1629 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1630 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1631 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1632 /* then set, what we really need */
1633 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1635 /* timer counter registers and stuff */
1636 { SPIDER_NET_GFREECNNUM, 0 },
1637 { SPIDER_NET_GONETIMENUM, 0 },
1638 { SPIDER_NET_GTOUTFRMNUM, 0 },
1640 /* RX mode setting */
1641 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1642 /* TX mode setting */
1643 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1644 /* IPSEC mode setting */
1645 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1647 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1649 { SPIDER_NET_GMRWOLCTRL, 0 },
1650 { SPIDER_NET_GTESTMD, 0x10000000 },
1651 { SPIDER_NET_GTTQMSK, 0x00400040 },
1653 { SPIDER_NET_GMACINTEN, 0 },
1655 /* flow control stuff */
1656 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1657 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1659 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1664 while (regs[i][0]) {
1665 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1669 /* clear unicast filter table entries 1 to 14 */
1670 for (i = 1; i <= 14; i++) {
1671 spider_net_write_reg(card,
1672 SPIDER_NET_GMRUAFILnR + i * 8,
1674 spider_net_write_reg(card,
1675 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1679 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1681 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1683 /* set chain tail adress for RX chains and
1685 spider_net_enable_rxchtails(card);
1686 spider_net_enable_rxdmac(card);
1688 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1690 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1691 SPIDER_NET_LENLMT_VALUE);
1692 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1693 SPIDER_NET_OPMODE_VALUE);
1695 /* set interrupt mask registers */
1696 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1697 SPIDER_NET_INT0_MASK_VALUE);
1698 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1699 SPIDER_NET_INT1_MASK_VALUE);
1700 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1701 SPIDER_NET_INT2_MASK_VALUE);
1703 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1704 SPIDER_NET_GDTBSTA);
1708 * spider_net_open - called upon ifonfig up
1709 * @netdev: interface device structure
1711 * returns 0 on success, <0 on failure
1713 * spider_net_open allocates all the descriptors and memory needed for
1714 * operation, sets up multicast list and enables interrupts
1717 spider_net_open(struct net_device *netdev)
1719 struct spider_net_card *card = netdev_priv(netdev);
1722 /* start probing with copper */
1723 spider_net_setup_aneg(card);
1724 if (card->phy.def->phy_id)
1725 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1727 result = spider_net_init_chain(card, &card->tx_chain);
1729 goto alloc_tx_failed;
1730 card->low_watermark = NULL;
1732 result = spider_net_init_chain(card, &card->rx_chain);
1734 goto alloc_rx_failed;
1736 /* Allocate rx skbs */
1737 if (spider_net_alloc_rx_skbs(card))
1738 goto alloc_skbs_failed;
1740 spider_net_set_multi(netdev);
1742 /* further enhancement: setup hw vlan, if needed */
1745 if (request_irq(netdev->irq, spider_net_interrupt,
1746 IRQF_SHARED, netdev->name, netdev))
1747 goto register_int_failed;
1749 spider_net_enable_card(card);
1751 netif_start_queue(netdev);
1752 netif_carrier_on(netdev);
1753 netif_poll_enable(netdev);
1757 register_int_failed:
1758 spider_net_free_rx_chain_contents(card);
1760 spider_net_free_chain(card, &card->rx_chain);
1762 spider_net_free_chain(card, &card->tx_chain);
1764 del_timer_sync(&card->aneg_timer);
1769 * spider_net_link_phy
1770 * @data: used for pointer to card structure
1773 static void spider_net_link_phy(unsigned long data)
1775 struct spider_net_card *card = (struct spider_net_card *)data;
1776 struct mii_phy *phy = &card->phy;
1778 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
1779 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
1781 pr_info("%s: link is down trying to bring it up\n", card->netdev->name);
1783 switch (phy->medium) {
1785 /* enable fiber with autonegotiation first */
1786 if (phy->def->ops->enable_fiber)
1787 phy->def->ops->enable_fiber(phy, 1);
1788 phy->medium = GMII_FIBER;
1792 /* fiber didn't come up, try to disable fiber autoneg */
1793 if (phy->def->ops->enable_fiber)
1794 phy->def->ops->enable_fiber(phy, 0);
1795 phy->medium = GMII_UNKNOWN;
1799 /* copper, fiber with and without failed,
1800 * retry from beginning */
1801 spider_net_setup_aneg(card);
1802 phy->medium = GMII_COPPER;
1806 card->aneg_count = 0;
1807 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1811 /* link still not up, try again later */
1812 if (!(phy->def->ops->poll_link(phy))) {
1814 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1818 /* link came up, get abilities */
1819 phy->def->ops->read_link(phy);
1821 spider_net_write_reg(card, SPIDER_NET_GMACST,
1822 spider_net_read_reg(card, SPIDER_NET_GMACST));
1823 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
1825 if (phy->speed == 1000)
1826 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
1828 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
1830 card->aneg_count = 0;
1832 pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n",
1833 phy->def->name, phy->speed, phy->duplex==1 ? "Full" : "Half",
1834 phy->autoneg==1 ? "" : "no ");
1840 * spider_net_setup_phy - setup PHY
1841 * @card: card structure
1843 * returns 0 on success, <0 on failure
1845 * spider_net_setup_phy is used as part of spider_net_probe.
1848 spider_net_setup_phy(struct spider_net_card *card)
1850 struct mii_phy *phy = &card->phy;
1852 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1853 SPIDER_NET_DMASEL_VALUE);
1854 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1855 SPIDER_NET_PHY_CTRL_VALUE);
1857 phy->dev = card->netdev;
1858 phy->mdio_read = spider_net_read_phy;
1859 phy->mdio_write = spider_net_write_phy;
1861 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
1863 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
1864 if (id != 0x0000 && id != 0xffff) {
1865 if (!mii_phy_probe(phy, phy->mii_id)) {
1866 pr_info("Found %s.\n", phy->def->name);
1876 * spider_net_download_firmware - loads firmware into the adapter
1877 * @card: card structure
1878 * @firmware_ptr: pointer to firmware data
1880 * spider_net_download_firmware loads the firmware data into the
1881 * adapter. It assumes the length etc. to be allright.
1884 spider_net_download_firmware(struct spider_net_card *card,
1885 const void *firmware_ptr)
1888 const u32 *fw_ptr = firmware_ptr;
1890 /* stop sequencers */
1891 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1892 SPIDER_NET_STOP_SEQ_VALUE);
1894 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1896 spider_net_write_reg(card,
1897 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1898 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1899 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1900 sequencer * 8, *fw_ptr);
1905 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1908 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1909 SPIDER_NET_RUN_SEQ_VALUE);
1915 * spider_net_init_firmware - reads in firmware parts
1916 * @card: card structure
1918 * Returns 0 on success, <0 on failure
1920 * spider_net_init_firmware opens the sequencer firmware and does some basic
1921 * checks. This function opens and releases the firmware structure. A call
1922 * to download the firmware is performed before the release.
1926 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1927 * the program for each sequencer. Use the command
1928 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1929 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1930 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1932 * to generate spider_fw.bin, if you have sequencer programs with something
1933 * like the following contents for each sequencer:
1934 * <ONE LINE COMMENT>
1935 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1936 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1938 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1941 spider_net_init_firmware(struct spider_net_card *card)
1943 struct firmware *firmware = NULL;
1944 struct device_node *dn;
1945 const u8 *fw_prop = NULL;
1949 if (request_firmware((const struct firmware **)&firmware,
1950 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1951 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1952 netif_msg_probe(card) ) {
1953 pr_err("Incorrect size of spidernet firmware in " \
1954 "filesystem. Looking in host firmware...\n");
1957 err = spider_net_download_firmware(card, firmware->data);
1959 release_firmware(firmware);
1967 dn = pci_device_to_OF_node(card->pdev);
1971 fw_prop = get_property(dn, "firmware", &fw_size);
1975 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1976 netif_msg_probe(card) ) {
1977 pr_err("Incorrect size of spidernet firmware in " \
1982 err = spider_net_download_firmware(card, fw_prop);
1987 if (netif_msg_probe(card))
1988 pr_err("Couldn't find spidernet firmware in filesystem " \
1989 "or host firmware\n");
1994 * spider_net_workaround_rxramfull - work around firmware bug
1995 * @card: card structure
2000 spider_net_workaround_rxramfull(struct spider_net_card *card)
2002 int i, sequencer = 0;
2005 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2006 SPIDER_NET_CKRCTRL_RUN_VALUE);
2008 /* empty sequencer data */
2009 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2011 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
2012 sequencer * 8, 0x0);
2013 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
2014 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2015 sequencer * 8, 0x0);
2019 /* set sequencer operation */
2020 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2023 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2024 SPIDER_NET_CKRCTRL_STOP_VALUE);
2028 * spider_net_stop - called upon ifconfig down
2029 * @netdev: interface device structure
2034 spider_net_stop(struct net_device *netdev)
2036 struct spider_net_card *card = netdev_priv(netdev);
2038 netif_poll_disable(netdev);
2039 netif_carrier_off(netdev);
2040 netif_stop_queue(netdev);
2041 del_timer_sync(&card->tx_timer);
2042 del_timer_sync(&card->aneg_timer);
2044 /* disable/mask all interrupts */
2045 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
2046 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
2047 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
2048 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
2050 free_irq(netdev->irq, netdev);
2052 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2053 SPIDER_NET_DMA_TX_FEND_VALUE);
2055 /* turn off DMA, force end */
2056 spider_net_disable_rxdmac(card);
2058 /* release chains */
2059 spider_net_release_tx_chain(card, 1);
2060 spider_net_free_rx_chain_contents(card);
2062 spider_net_free_chain(card, &card->tx_chain);
2063 spider_net_free_chain(card, &card->rx_chain);
2069 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2070 * function (to be called not under interrupt status)
2071 * @data: data, is interface device structure
2073 * called as task when tx hangs, resets interface (if interface is up)
2076 spider_net_tx_timeout_task(struct work_struct *work)
2078 struct spider_net_card *card =
2079 container_of(work, struct spider_net_card, tx_timeout_task);
2080 struct net_device *netdev = card->netdev;
2082 if (!(netdev->flags & IFF_UP))
2085 netif_device_detach(netdev);
2086 spider_net_stop(netdev);
2088 spider_net_workaround_rxramfull(card);
2089 spider_net_init_card(card);
2091 if (spider_net_setup_phy(card))
2093 if (spider_net_init_firmware(card))
2096 spider_net_open(netdev);
2097 spider_net_kick_tx_dma(card);
2098 netif_device_attach(netdev);
2101 atomic_dec(&card->tx_timeout_task_counter);
2105 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2106 * @netdev: interface device structure
2108 * called, if tx hangs. Schedules a task that resets the interface
2111 spider_net_tx_timeout(struct net_device *netdev)
2113 struct spider_net_card *card;
2115 card = netdev_priv(netdev);
2116 atomic_inc(&card->tx_timeout_task_counter);
2117 if (netdev->flags & IFF_UP)
2118 schedule_work(&card->tx_timeout_task);
2120 atomic_dec(&card->tx_timeout_task_counter);
2121 card->spider_stats.tx_timeouts++;
2125 * spider_net_setup_netdev_ops - initialization of net_device operations
2126 * @netdev: net_device structure
2128 * fills out function pointers in the net_device structure
2131 spider_net_setup_netdev_ops(struct net_device *netdev)
2133 netdev->open = &spider_net_open;
2134 netdev->stop = &spider_net_stop;
2135 netdev->hard_start_xmit = &spider_net_xmit;
2136 netdev->get_stats = &spider_net_get_stats;
2137 netdev->set_multicast_list = &spider_net_set_multi;
2138 netdev->set_mac_address = &spider_net_set_mac;
2139 netdev->change_mtu = &spider_net_change_mtu;
2140 netdev->do_ioctl = &spider_net_do_ioctl;
2142 netdev->tx_timeout = &spider_net_tx_timeout;
2143 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2145 netdev->poll = &spider_net_poll;
2146 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
2148 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
2149 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
2150 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
2151 #ifdef CONFIG_NET_POLL_CONTROLLER
2152 /* poll controller */
2153 netdev->poll_controller = &spider_net_poll_controller;
2154 #endif /* CONFIG_NET_POLL_CONTROLLER */
2156 netdev->ethtool_ops = &spider_net_ethtool_ops;
2160 * spider_net_setup_netdev - initialization of net_device
2161 * @card: card structure
2163 * Returns 0 on success or <0 on failure
2165 * spider_net_setup_netdev initializes the net_device structure
2168 spider_net_setup_netdev(struct spider_net_card *card)
2171 struct net_device *netdev = card->netdev;
2172 struct device_node *dn;
2173 struct sockaddr addr;
2176 SET_MODULE_OWNER(netdev);
2177 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2179 pci_set_drvdata(card->pdev, netdev);
2181 init_timer(&card->tx_timer);
2182 card->tx_timer.function =
2183 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2184 card->tx_timer.data = (unsigned long) card;
2185 netdev->irq = card->pdev->irq;
2187 card->aneg_count = 0;
2188 init_timer(&card->aneg_timer);
2189 card->aneg_timer.function = spider_net_link_phy;
2190 card->aneg_timer.data = (unsigned long) card;
2192 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2194 card->tx_chain.num_desc = tx_descriptors;
2195 card->rx_chain.num_desc = rx_descriptors;
2197 spider_net_setup_netdev_ops(netdev);
2199 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
2200 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2201 * NETIF_F_HW_VLAN_FILTER */
2203 netdev->irq = card->pdev->irq;
2205 dn = pci_device_to_OF_node(card->pdev);
2209 mac = get_property(dn, "local-mac-address", NULL);
2212 memcpy(addr.sa_data, mac, ETH_ALEN);
2214 result = spider_net_set_mac(netdev, &addr);
2215 if ((result) && (netif_msg_probe(card)))
2216 pr_err("Failed to set MAC address: %i\n", result);
2218 result = register_netdev(netdev);
2220 if (netif_msg_probe(card))
2221 pr_err("Couldn't register net_device: %i\n",
2226 if (netif_msg_probe(card))
2227 pr_info("Initialized device %s.\n", netdev->name);
2233 * spider_net_alloc_card - allocates net_device and card structure
2235 * returns the card structure or NULL in case of errors
2237 * the card and net_device structures are linked to each other
2239 static struct spider_net_card *
2240 spider_net_alloc_card(void)
2242 struct net_device *netdev;
2243 struct spider_net_card *card;
2245 netdev = alloc_etherdev(sizeof(struct spider_net_card));
2249 card = netdev_priv(netdev);
2250 card->netdev = netdev;
2251 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2252 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
2253 init_waitqueue_head(&card->waitq);
2254 atomic_set(&card->tx_timeout_task_counter, 0);
2260 * spider_net_undo_pci_setup - releases PCI ressources
2261 * @card: card structure
2263 * spider_net_undo_pci_setup releases the mapped regions
2266 spider_net_undo_pci_setup(struct spider_net_card *card)
2268 iounmap(card->regs);
2269 pci_release_regions(card->pdev);
2273 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2274 * @card: card structure
2277 * Returns the card structure or NULL if any errors occur
2279 * spider_net_setup_pci_dev initializes pdev and together with the
2280 * functions called in spider_net_open configures the device so that
2281 * data can be transferred over it
2282 * The net_device structure is attached to the card structure, if the
2283 * function returns without error.
2285 static struct spider_net_card *
2286 spider_net_setup_pci_dev(struct pci_dev *pdev)
2288 struct spider_net_card *card;
2289 unsigned long mmio_start, mmio_len;
2291 if (pci_enable_device(pdev)) {
2292 pr_err("Couldn't enable PCI device\n");
2296 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2297 pr_err("Couldn't find proper PCI device base address.\n");
2298 goto out_disable_dev;
2301 if (pci_request_regions(pdev, spider_net_driver_name)) {
2302 pr_err("Couldn't obtain PCI resources, aborting.\n");
2303 goto out_disable_dev;
2306 pci_set_master(pdev);
2308 card = spider_net_alloc_card();
2310 pr_err("Couldn't allocate net_device structure, "
2312 goto out_release_regions;
2316 /* fetch base address and length of first resource */
2317 mmio_start = pci_resource_start(pdev, 0);
2318 mmio_len = pci_resource_len(pdev, 0);
2320 card->netdev->mem_start = mmio_start;
2321 card->netdev->mem_end = mmio_start + mmio_len;
2322 card->regs = ioremap(mmio_start, mmio_len);
2325 pr_err("Couldn't obtain PCI resources, aborting.\n");
2326 goto out_release_regions;
2331 out_release_regions:
2332 pci_release_regions(pdev);
2334 pci_disable_device(pdev);
2335 pci_set_drvdata(pdev, NULL);
2340 * spider_net_probe - initialization of a device
2342 * @ent: entry in the device id list
2344 * Returns 0 on success, <0 on failure
2346 * spider_net_probe initializes pdev and registers a net_device
2347 * structure for it. After that, the device can be ifconfig'ed up
2349 static int __devinit
2350 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2353 struct spider_net_card *card;
2355 card = spider_net_setup_pci_dev(pdev);
2359 spider_net_workaround_rxramfull(card);
2360 spider_net_init_card(card);
2362 err = spider_net_setup_phy(card);
2366 err = spider_net_init_firmware(card);
2370 err = spider_net_setup_netdev(card);
2377 spider_net_undo_pci_setup(card);
2378 free_netdev(card->netdev);
2384 * spider_net_remove - removal of a device
2387 * Returns 0 on success, <0 on failure
2389 * spider_net_remove is called to remove the device and unregisters the
2392 static void __devexit
2393 spider_net_remove(struct pci_dev *pdev)
2395 struct net_device *netdev;
2396 struct spider_net_card *card;
2398 netdev = pci_get_drvdata(pdev);
2399 card = netdev_priv(netdev);
2401 wait_event(card->waitq,
2402 atomic_read(&card->tx_timeout_task_counter) == 0);
2404 unregister_netdev(netdev);
2406 /* switch off card */
2407 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2408 SPIDER_NET_CKRCTRL_STOP_VALUE);
2409 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2410 SPIDER_NET_CKRCTRL_RUN_VALUE);
2412 spider_net_undo_pci_setup(card);
2413 free_netdev(netdev);
2416 static struct pci_driver spider_net_driver = {
2417 .name = spider_net_driver_name,
2418 .id_table = spider_net_pci_tbl,
2419 .probe = spider_net_probe,
2420 .remove = __devexit_p(spider_net_remove)
2424 * spider_net_init - init function when the driver is loaded
2426 * spider_net_init registers the device driver
2428 static int __init spider_net_init(void)
2430 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2432 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2433 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2434 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2436 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2437 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2438 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2440 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2441 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2442 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2444 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2445 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2446 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2449 return pci_register_driver(&spider_net_driver);
2453 * spider_net_cleanup - exit function when driver is unloaded
2455 * spider_net_cleanup unregisters the device driver
2457 static void __exit spider_net_cleanup(void)
2459 pci_unregister_driver(&spider_net_driver);
2462 module_init(spider_net_init);
2463 module_exit(spider_net_cleanup);