2 * Network device driver for Cell Processor-Based Blade and Celleb platform
4 * (C) Copyright IBM Corp. 2005
5 * (C) Copyright 2006 TOSHIBA CORPORATION
7 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
8 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <linux/compiler.h>
26 #include <linux/crc32.h>
27 #include <linux/delay.h>
28 #include <linux/etherdevice.h>
29 #include <linux/ethtool.h>
30 #include <linux/firmware.h>
31 #include <linux/if_vlan.h>
33 #include <linux/init.h>
34 #include <linux/ioport.h>
36 #include <linux/kernel.h>
37 #include <linux/mii.h>
38 #include <linux/module.h>
39 #include <linux/netdevice.h>
40 #include <linux/device.h>
41 #include <linux/pci.h>
42 #include <linux/skbuff.h>
43 #include <linux/slab.h>
44 #include <linux/tcp.h>
45 #include <linux/types.h>
46 #include <linux/vmalloc.h>
47 #include <linux/wait.h>
48 #include <linux/workqueue.h>
49 #include <asm/bitops.h>
50 #include <asm/pci-bridge.h>
51 #include <net/checksum.h>
53 #include "spider_net.h"
55 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
56 "<Jens.Osterkamp@de.ibm.com>");
57 MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
58 MODULE_LICENSE("GPL");
59 MODULE_VERSION(VERSION);
61 static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
62 static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
64 module_param(rx_descriptors, int, 0444);
65 module_param(tx_descriptors, int, 0444);
67 MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
69 MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
72 char spider_net_driver_name[] = "spidernet";
74 static struct pci_device_id spider_net_pci_tbl[] = {
75 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
76 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
80 MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
83 * spider_net_read_reg - reads an SMMIO register of a card
84 * @card: device structure
85 * @reg: register to read from
87 * returns the content of the specified SMMIO register.
90 spider_net_read_reg(struct spider_net_card *card, u32 reg)
92 /* We use the powerpc specific variants instead of readl_be() because
93 * we know spidernet is not a real PCI device and we can thus avoid the
94 * performance hit caused by the PCI workarounds.
96 return in_be32(card->regs + reg);
100 * spider_net_write_reg - writes to an SMMIO register of a card
101 * @card: device structure
102 * @reg: register to write to
103 * @value: value to write into the specified SMMIO register
106 spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
108 /* We use the powerpc specific variants instead of writel_be() because
109 * we know spidernet is not a real PCI device and we can thus avoid the
110 * performance hit caused by the PCI workarounds.
112 out_be32(card->regs + reg, value);
115 /** spider_net_write_phy - write to phy register
116 * @netdev: adapter to be written to
119 * @val: value to be written to phy register
121 * spider_net_write_phy_register writes to an arbitrary PHY
122 * register via the spider GPCWOPCMD register. We assume the queue does
123 * not run full (not more than 15 commands outstanding).
126 spider_net_write_phy(struct net_device *netdev, int mii_id,
129 struct spider_net_card *card = netdev_priv(netdev);
132 writevalue = ((u32)mii_id << 21) |
133 ((u32)reg << 16) | ((u32)val);
135 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
138 /** spider_net_read_phy - read from phy register
139 * @netdev: network device to be read from
143 * Returns value read from PHY register
145 * spider_net_write_phy reads from an arbitrary PHY
146 * register via the spider GPCROPCMD register
149 spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
151 struct spider_net_card *card = netdev_priv(netdev);
154 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
155 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
157 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
158 * interrupt, as we poll for the completion of the read operation
159 * in spider_net_read_phy. Should take about 50 us */
161 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
162 } while (readvalue & SPIDER_NET_GPREXEC);
164 readvalue &= SPIDER_NET_GPRDAT_MASK;
170 * spider_net_setup_aneg - initial auto-negotiation setup
171 * @card: device structure
174 spider_net_setup_aneg(struct spider_net_card *card)
176 struct mii_phy *phy = &card->phy;
178 u16 bmcr, bmsr, stat1000, estat;
180 bmcr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMCR);
181 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
182 stat1000 = spider_net_read_phy(card->netdev, phy->mii_id, MII_STAT1000);
183 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
185 if (bmsr & BMSR_10HALF)
186 advertise |= ADVERTISED_10baseT_Half;
187 if (bmsr & BMSR_10FULL)
188 advertise |= ADVERTISED_10baseT_Full;
189 if (bmsr & BMSR_100HALF)
190 advertise |= ADVERTISED_100baseT_Half;
191 if (bmsr & BMSR_100FULL)
192 advertise |= ADVERTISED_100baseT_Full;
194 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
195 advertise |= SUPPORTED_1000baseT_Full;
196 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
197 advertise |= SUPPORTED_1000baseT_Half;
199 mii_phy_probe(phy, phy->mii_id);
200 phy->def->ops->setup_aneg(phy, advertise);
205 * spider_net_rx_irq_off - switch off rx irq on this spider card
206 * @card: device structure
208 * switches off rx irq by masking them out in the GHIINTnMSK register
211 spider_net_rx_irq_off(struct spider_net_card *card)
215 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
216 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
220 * spider_net_rx_irq_on - switch on rx irq on this spider card
221 * @card: device structure
223 * switches on rx irq by enabling them in the GHIINTnMSK register
226 spider_net_rx_irq_on(struct spider_net_card *card)
230 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
231 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
235 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
236 * @card: card structure
238 * spider_net_set_promisc sets the unicast destination address filter and
239 * thus either allows for non-promisc mode or promisc mode
242 spider_net_set_promisc(struct spider_net_card *card)
245 struct net_device *netdev = card->netdev;
247 if (netdev->flags & IFF_PROMISC) {
248 /* clear destination entry 0 */
249 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
250 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
251 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
252 SPIDER_NET_PROMISC_VALUE);
254 macu = netdev->dev_addr[0];
256 macu |= netdev->dev_addr[1];
257 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
259 macu |= SPIDER_NET_UA_DESCR_VALUE;
260 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
261 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
262 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
263 SPIDER_NET_NONPROMISC_VALUE);
268 * spider_net_get_mac_address - read mac address from spider card
269 * @card: device structure
271 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
274 spider_net_get_mac_address(struct net_device *netdev)
276 struct spider_net_card *card = netdev_priv(netdev);
279 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
280 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
282 netdev->dev_addr[0] = (macu >> 24) & 0xff;
283 netdev->dev_addr[1] = (macu >> 16) & 0xff;
284 netdev->dev_addr[2] = (macu >> 8) & 0xff;
285 netdev->dev_addr[3] = macu & 0xff;
286 netdev->dev_addr[4] = (macl >> 8) & 0xff;
287 netdev->dev_addr[5] = macl & 0xff;
289 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
296 * spider_net_get_descr_status -- returns the status of a descriptor
297 * @descr: descriptor to look at
299 * returns the status as in the dmac_cmd_status field of the descriptor
302 spider_net_get_descr_status(struct spider_net_descr *descr)
304 return descr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
308 * spider_net_free_chain - free descriptor chain
309 * @card: card structure
310 * @chain: address of chain
314 spider_net_free_chain(struct spider_net_card *card,
315 struct spider_net_descr_chain *chain)
317 struct spider_net_descr *descr;
322 descr->next_descr_addr = 0;
324 } while (descr != chain->ring);
326 dma_free_coherent(&card->pdev->dev, chain->num_desc,
327 chain->ring, chain->dma_addr);
331 * spider_net_init_chain - alloc and link descriptor chain
332 * @card: card structure
333 * @chain: address of chain
335 * We manage a circular list that mirrors the hardware structure,
336 * except that the hardware uses bus addresses.
338 * Returns 0 on success, <0 on failure
341 spider_net_init_chain(struct spider_net_card *card,
342 struct spider_net_descr_chain *chain)
345 struct spider_net_descr *descr;
349 alloc_size = chain->num_desc * sizeof (struct spider_net_descr);
351 chain->ring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
352 &chain->dma_addr, GFP_KERNEL);
358 memset(descr, 0, alloc_size);
360 /* Set up the hardware pointers in each descriptor */
361 buf = chain->dma_addr;
362 for (i=0; i < chain->num_desc; i++, descr++) {
363 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
365 descr->bus_addr = buf;
366 descr->next_descr_addr = 0;
367 descr->next = descr + 1;
368 descr->prev = descr - 1;
370 buf += sizeof(struct spider_net_descr);
372 /* do actual circular list */
373 (descr-1)->next = chain->ring;
374 chain->ring->prev = descr-1;
376 spin_lock_init(&chain->lock);
377 chain->head = chain->ring;
378 chain->tail = chain->ring;
383 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
384 * @card: card structure
386 * returns 0 on success, <0 on failure
389 spider_net_free_rx_chain_contents(struct spider_net_card *card)
391 struct spider_net_descr *descr;
393 descr = card->rx_chain.head;
396 dev_kfree_skb(descr->skb);
397 pci_unmap_single(card->pdev, descr->buf_addr,
398 SPIDER_NET_MAX_FRAME,
399 PCI_DMA_BIDIRECTIONAL);
402 } while (descr != card->rx_chain.head);
406 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
407 * @card: card structure
408 * @descr: descriptor to re-init
410 * Return 0 on succes, <0 on failure.
412 * Allocates a new rx skb, iommu-maps it and attaches it to the
413 * descriptor. Mark the descriptor as activated, ready-to-use.
416 spider_net_prepare_rx_descr(struct spider_net_card *card,
417 struct spider_net_descr *descr)
423 /* we need to round up the buffer size to a multiple of 128 */
424 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
425 (~(SPIDER_NET_RXBUF_ALIGN - 1));
427 /* and we need to have it 128 byte aligned, therefore we allocate a
429 /* allocate an skb */
430 descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
432 if (netif_msg_rx_err(card) && net_ratelimit())
433 pr_err("Not enough memory to allocate rx buffer\n");
434 card->spider_stats.alloc_rx_skb_error++;
437 descr->buf_size = bufsize;
438 descr->result_size = 0;
439 descr->valid_size = 0;
440 descr->data_status = 0;
441 descr->data_error = 0;
443 offset = ((unsigned long)descr->skb->data) &
444 (SPIDER_NET_RXBUF_ALIGN - 1);
446 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
447 /* iommu-map the skb */
448 buf = pci_map_single(card->pdev, descr->skb->data,
449 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
450 descr->buf_addr = buf;
451 if (pci_dma_mapping_error(buf)) {
452 dev_kfree_skb_any(descr->skb);
453 if (netif_msg_rx_err(card) && net_ratelimit())
454 pr_err("Could not iommu-map rx buffer\n");
455 card->spider_stats.rx_iommu_map_error++;
456 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
458 descr->next_descr_addr = 0;
460 descr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
461 SPIDER_NET_DMAC_NOINTR_COMPLETE;
464 descr->prev->next_descr_addr = descr->bus_addr;
471 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
472 * @card: card structure
474 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
475 * chip by writing to the appropriate register. DMA is enabled in
476 * spider_net_enable_rxdmac.
479 spider_net_enable_rxchtails(struct spider_net_card *card)
481 /* assume chain is aligned correctly */
482 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
483 card->rx_chain.tail->bus_addr);
487 * spider_net_enable_rxdmac - enables a receive DMA controller
488 * @card: card structure
490 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
491 * in the GDADMACCNTR register
494 spider_net_enable_rxdmac(struct spider_net_card *card)
497 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
498 SPIDER_NET_DMA_RX_VALUE);
502 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
503 * @card: card structure
505 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
508 spider_net_refill_rx_chain(struct spider_net_card *card)
510 struct spider_net_descr_chain *chain = &card->rx_chain;
513 /* one context doing the refill (and a second context seeing that
514 * and omitting it) is ok. If called by NAPI, we'll be called again
515 * as spider_net_decode_one_descr is called several times. If some
516 * interrupt calls us, the NAPI is about to clean up anyway. */
517 if (!spin_trylock_irqsave(&chain->lock, flags))
520 while (spider_net_get_descr_status(chain->head) ==
521 SPIDER_NET_DESCR_NOT_IN_USE) {
522 if (spider_net_prepare_rx_descr(card, chain->head))
524 chain->head = chain->head->next;
527 spin_unlock_irqrestore(&chain->lock, flags);
531 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
532 * @card: card structure
534 * Returns 0 on success, <0 on failure.
537 spider_net_alloc_rx_skbs(struct spider_net_card *card)
540 struct spider_net_descr_chain *chain;
544 chain = &card->rx_chain;
545 /* Put at least one buffer into the chain. if this fails,
546 * we've got a problem. If not, spider_net_refill_rx_chain
547 * will do the rest at the end of this function. */
548 if (spider_net_prepare_rx_descr(card, chain->head))
551 chain->head = chain->head->next;
553 /* This will allocate the rest of the rx buffers;
554 * if not, it's business as usual later on. */
555 spider_net_refill_rx_chain(card);
556 spider_net_enable_rxdmac(card);
560 spider_net_free_rx_chain_contents(card);
565 * spider_net_get_multicast_hash - generates hash for multicast filter table
566 * @addr: multicast address
568 * returns the hash value.
570 * spider_net_get_multicast_hash calculates a hash value for a given multicast
571 * address, that is used to set the multicast filter tables
574 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
578 char addr_for_crc[ETH_ALEN] = { 0, };
581 for (i = 0; i < ETH_ALEN * 8; i++) {
582 bit = (addr[i / 8] >> (i % 8)) & 1;
583 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
586 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
597 * spider_net_set_multi - sets multicast addresses and promisc flags
598 * @netdev: interface device structure
600 * spider_net_set_multi configures multicast addresses as needed for the
601 * netdev interface. It also sets up multicast, allmulti and promisc
602 * flags appropriately
605 spider_net_set_multi(struct net_device *netdev)
607 struct dev_mc_list *mc;
611 struct spider_net_card *card = netdev_priv(netdev);
612 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
615 spider_net_set_promisc(card);
617 if (netdev->flags & IFF_ALLMULTI) {
618 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
624 /* well, we know, what the broadcast hash value is: it's xfd
625 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
626 set_bit(0xfd, bitmask);
628 for (mc = netdev->mc_list; mc; mc = mc->next) {
629 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
630 set_bit(hash, bitmask);
634 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
636 if (test_bit(i * 4, bitmask))
639 if (test_bit(i * 4 + 1, bitmask))
642 if (test_bit(i * 4 + 2, bitmask))
645 if (test_bit(i * 4 + 3, bitmask))
648 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
653 * spider_net_disable_rxdmac - disables the receive DMA controller
654 * @card: card structure
656 * spider_net_disable_rxdmac terminates processing on the DMA controller by
657 * turing off DMA and issueing a force end
660 spider_net_disable_rxdmac(struct spider_net_card *card)
662 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
663 SPIDER_NET_DMA_RX_FEND_VALUE);
667 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
668 * @card: card structure
669 * @descr: descriptor structure to fill out
670 * @skb: packet to use
672 * returns 0 on success, <0 on failure.
674 * fills out the descriptor structure with skb data and len. Copies data,
675 * if needed (32bit DMA!)
678 spider_net_prepare_tx_descr(struct spider_net_card *card,
681 struct spider_net_descr *descr;
685 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
686 if (pci_dma_mapping_error(buf)) {
687 if (netif_msg_tx_err(card) && net_ratelimit())
688 pr_err("could not iommu-map packet (%p, %i). "
689 "Dropping packet\n", skb->data, skb->len);
690 card->spider_stats.tx_iommu_map_error++;
694 spin_lock_irqsave(&card->tx_chain.lock, flags);
695 descr = card->tx_chain.head;
696 card->tx_chain.head = descr->next;
698 descr->buf_addr = buf;
699 descr->buf_size = skb->len;
700 descr->next_descr_addr = 0;
702 descr->data_status = 0;
704 descr->dmac_cmd_status =
705 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
706 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
708 if (skb->protocol == htons(ETH_P_IP))
709 switch (skb->nh.iph->protocol) {
711 descr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
714 descr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
718 /* Chain the bus address, so that the DMA engine finds this descr. */
719 descr->prev->next_descr_addr = descr->bus_addr;
721 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
726 spider_net_set_low_watermark(struct spider_net_card *card)
732 struct spider_net_descr *descr = card->tx_chain.tail;
734 /* Measure the length of the queue. Measurement does not
735 * need to be precise -- does not need a lock. */
736 while (descr != card->tx_chain.head) {
737 status = descr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
738 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
744 /* If TX queue is short, don't even bother with interrupts */
745 if (cnt < card->tx_chain.num_desc/4)
748 /* Set low-watermark 3/4th's of the way into the queue. */
749 descr = card->tx_chain.tail;
754 /* Set the new watermark, clear the old watermark */
755 spin_lock_irqsave(&card->tx_chain.lock, flags);
756 descr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
757 if (card->low_watermark && card->low_watermark != descr)
758 card->low_watermark->dmac_cmd_status =
759 card->low_watermark->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
760 card->low_watermark = descr;
761 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
766 * spider_net_release_tx_chain - processes sent tx descriptors
767 * @card: adapter structure
768 * @brutal: if set, don't care about whether descriptor seems to be in use
770 * returns 0 if the tx ring is empty, otherwise 1.
772 * spider_net_release_tx_chain releases the tx descriptors that spider has
773 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
774 * If some other context is calling this function, we return 1 so that we're
775 * scheduled again (if we were scheduled) and will not loose initiative.
778 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
780 struct spider_net_descr_chain *chain = &card->tx_chain;
781 struct spider_net_descr *descr;
787 while (chain->tail != chain->head) {
788 spin_lock_irqsave(&chain->lock, flags);
791 status = spider_net_get_descr_status(descr);
793 case SPIDER_NET_DESCR_COMPLETE:
794 card->netdev_stats.tx_packets++;
795 card->netdev_stats.tx_bytes += descr->skb->len;
798 case SPIDER_NET_DESCR_CARDOWNED:
800 spin_unlock_irqrestore(&chain->lock, flags);
804 /* fallthrough, if we release the descriptors
805 * brutally (then we don't care about
806 * SPIDER_NET_DESCR_CARDOWNED) */
808 case SPIDER_NET_DESCR_RESPONSE_ERROR:
809 case SPIDER_NET_DESCR_PROTECTION_ERROR:
810 case SPIDER_NET_DESCR_FORCE_END:
811 if (netif_msg_tx_err(card))
812 pr_err("%s: forcing end of tx descriptor "
813 "with status x%02x\n",
814 card->netdev->name, status);
815 card->netdev_stats.tx_errors++;
819 card->netdev_stats.tx_dropped++;
821 spin_unlock_irqrestore(&chain->lock, flags);
826 chain->tail = descr->next;
827 descr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
829 buf_addr = descr->buf_addr;
830 spin_unlock_irqrestore(&chain->lock, flags);
834 pci_unmap_single(card->pdev, buf_addr, skb->len,
843 * spider_net_kick_tx_dma - enables TX DMA processing
844 * @card: card structure
845 * @descr: descriptor address to enable TX processing at
847 * This routine will start the transmit DMA running if
848 * it is not already running. This routine ned only be
849 * called when queueing a new packet to an empty tx queue.
850 * Writes the current tx chain head as start address
851 * of the tx descriptor chain and enables the transmission
855 spider_net_kick_tx_dma(struct spider_net_card *card)
857 struct spider_net_descr *descr;
859 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
860 SPIDER_NET_TX_DMA_EN)
863 descr = card->tx_chain.tail;
865 if (spider_net_get_descr_status(descr) ==
866 SPIDER_NET_DESCR_CARDOWNED) {
867 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
869 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
870 SPIDER_NET_DMA_TX_VALUE);
873 if (descr == card->tx_chain.head)
879 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
883 * spider_net_xmit - transmits a frame over the device
884 * @skb: packet to send out
885 * @netdev: interface device structure
887 * returns 0 on success, !0 on failure
890 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
893 struct spider_net_card *card = netdev_priv(netdev);
894 struct spider_net_descr_chain *chain = &card->tx_chain;
896 spider_net_release_tx_chain(card, 0);
898 if ((chain->head->next == chain->tail->prev) ||
899 (spider_net_prepare_tx_descr(card, skb) != 0)) {
901 card->netdev_stats.tx_dropped++;
902 netif_stop_queue(netdev);
903 return NETDEV_TX_BUSY;
906 cnt = spider_net_set_low_watermark(card);
908 spider_net_kick_tx_dma(card);
913 * spider_net_cleanup_tx_ring - cleans up the TX ring
914 * @card: card structure
916 * spider_net_cleanup_tx_ring is called by either the tx_timer
917 * or from the NAPI polling routine.
918 * This routine releases resources associted with transmitted
919 * packets, including updating the queue tail pointer.
922 spider_net_cleanup_tx_ring(struct spider_net_card *card)
924 if ((spider_net_release_tx_chain(card, 0) != 0) &&
925 (card->netdev->flags & IFF_UP)) {
926 spider_net_kick_tx_dma(card);
927 netif_wake_queue(card->netdev);
932 * spider_net_do_ioctl - called for device ioctls
933 * @netdev: interface device structure
934 * @ifr: request parameter structure for ioctl
935 * @cmd: command code for ioctl
937 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
938 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
941 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
950 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
951 * @descr: descriptor to process
952 * @card: card structure
954 * Fills out skb structure and passes the data to the stack.
955 * The descriptor state is not changed.
958 spider_net_pass_skb_up(struct spider_net_descr *descr,
959 struct spider_net_card *card)
962 struct net_device *netdev;
963 u32 data_status, data_error;
965 data_status = descr->data_status;
966 data_error = descr->data_error;
967 netdev = card->netdev;
971 skb_put(skb, descr->valid_size);
973 /* the card seems to add 2 bytes of junk in front
974 * of the ethernet frame */
975 #define SPIDER_MISALIGN 2
976 skb_pull(skb, SPIDER_MISALIGN);
977 skb->protocol = eth_type_trans(skb, netdev);
979 /* checksum offload */
980 if (card->options.rx_csum) {
981 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
982 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
983 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
984 skb->ip_summed = CHECKSUM_UNNECESSARY;
986 skb->ip_summed = CHECKSUM_NONE;
988 skb->ip_summed = CHECKSUM_NONE;
990 if (data_status & SPIDER_NET_VLAN_PACKET) {
991 /* further enhancements: HW-accel VLAN
992 * vlan_hwaccel_receive_skb
996 /* pass skb up to stack */
997 netif_receive_skb(skb);
999 /* update netdevice statistics */
1000 card->netdev_stats.rx_packets++;
1001 card->netdev_stats.rx_bytes += skb->len;
1005 static void show_rx_chain(struct spider_net_card *card)
1007 struct spider_net_descr_chain *chain = &card->rx_chain;
1008 struct spider_net_descr *start= chain->tail;
1009 struct spider_net_descr *descr= start;
1013 int cstat = spider_net_get_descr_status(descr);
1014 printk(KERN_INFO "RX chain tail at descr=%ld\n",
1015 (start - card->descr) - card->tx_chain.num_desc);
1019 status = spider_net_get_descr_status(descr);
1020 if (cstat != status) {
1021 printk(KERN_INFO "Have %d descrs with stat=x%08x\n", cnt, cstat);
1026 descr = descr->next;
1027 } while (descr != start);
1028 printk(KERN_INFO "Last %d descrs with stat=x%08x\n", cnt, cstat);
1033 * spider_net_decode_one_descr - processes an rx descriptor
1034 * @card: card structure
1036 * Returns 1 if a packet has been sent to the stack, otherwise 0
1038 * Processes an rx descriptor by iommu-unmapping the data buffer and passing
1039 * the packet up to the stack. This function is called in softirq
1040 * context, e.g. either bottom half from interrupt or NAPI polling context
1043 spider_net_decode_one_descr(struct spider_net_card *card)
1045 struct spider_net_descr_chain *chain = &card->rx_chain;
1046 struct spider_net_descr *descr = chain->tail;
1049 status = spider_net_get_descr_status(descr);
1051 /* Nothing in the descriptor, or ring must be empty */
1052 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1053 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1056 /* descriptor definitively used -- move on tail */
1057 chain->tail = descr->next;
1059 /* unmap descriptor */
1060 pci_unmap_single(card->pdev, descr->buf_addr,
1061 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1063 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1064 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1065 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1066 if (netif_msg_rx_err(card))
1067 pr_err("%s: dropping RX descriptor with state %d\n",
1068 card->netdev->name, status);
1069 card->netdev_stats.rx_dropped++;
1073 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1074 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1075 if (netif_msg_rx_err(card))
1076 pr_err("%s: RX descriptor with unkown state %d\n",
1077 card->netdev->name, status);
1078 card->spider_stats.rx_desc_unk_state++;
1082 /* The cases we'll throw away the packet immediately */
1083 if (descr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
1084 if (netif_msg_rx_err(card))
1085 pr_err("%s: error in received descriptor found, "
1086 "data_status=x%08x, data_error=x%08x\n",
1088 descr->data_status, descr->data_error);
1092 if (descr->dmac_cmd_status & 0xfefe) {
1093 pr_err("%s: bad status, cmd_status=x%08x\n",
1095 descr->dmac_cmd_status);
1096 pr_err("buf_addr=x%08x\n", descr->buf_addr);
1097 pr_err("buf_size=x%08x\n", descr->buf_size);
1098 pr_err("next_descr_addr=x%08x\n", descr->next_descr_addr);
1099 pr_err("result_size=x%08x\n", descr->result_size);
1100 pr_err("valid_size=x%08x\n", descr->valid_size);
1101 pr_err("data_status=x%08x\n", descr->data_status);
1102 pr_err("data_error=x%08x\n", descr->data_error);
1103 pr_err("bus_addr=x%08x\n", descr->bus_addr);
1104 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1106 card->spider_stats.rx_desc_error++;
1110 /* Ok, we've got a packet in descr */
1111 spider_net_pass_skb_up(descr, card);
1112 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1116 dev_kfree_skb_irq(descr->skb);
1117 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1122 * spider_net_poll - NAPI poll function called by the stack to return packets
1123 * @netdev: interface device structure
1124 * @budget: number of packets we can pass to the stack at most
1126 * returns 0 if no more packets available to the driver/stack. Returns 1,
1127 * if the quota is exceeded, but the driver has still packets.
1129 * spider_net_poll returns all packets from the rx descriptors to the stack
1130 * (using netif_receive_skb). If all/enough packets are up, the driver
1131 * reenables interrupts and returns 0. If not, 1 is returned.
1134 spider_net_poll(struct net_device *netdev, int *budget)
1136 struct spider_net_card *card = netdev_priv(netdev);
1137 int packets_to_do, packets_done = 0;
1138 int no_more_packets = 0;
1140 spider_net_cleanup_tx_ring(card);
1141 packets_to_do = min(*budget, netdev->quota);
1143 while (packets_to_do) {
1144 if (spider_net_decode_one_descr(card)) {
1148 /* no more packets for the stack */
1149 no_more_packets = 1;
1154 netdev->quota -= packets_done;
1155 *budget -= packets_done;
1156 spider_net_refill_rx_chain(card);
1157 spider_net_enable_rxdmac(card);
1159 /* if all packets are in the stack, enable interrupts and return 0 */
1160 /* if not, return 1 */
1161 if (no_more_packets) {
1162 netif_rx_complete(netdev);
1163 spider_net_rx_irq_on(card);
1171 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1172 * @netdev: interface device structure
1173 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1176 spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1178 /* further enhancement... yet to do */
1183 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1184 * @netdev: interface device structure
1185 * @vid: VLAN id to add
1188 spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1190 /* further enhancement... yet to do */
1191 /* add vid to card's VLAN filter table */
1196 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1197 * @netdev: interface device structure
1198 * @vid: VLAN id to remove
1201 spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1203 /* further enhancement... yet to do */
1204 /* remove vid from card's VLAN filter table */
1208 * spider_net_get_stats - get interface statistics
1209 * @netdev: interface device structure
1211 * returns the interface statistics residing in the spider_net_card struct
1213 static struct net_device_stats *
1214 spider_net_get_stats(struct net_device *netdev)
1216 struct spider_net_card *card = netdev_priv(netdev);
1217 struct net_device_stats *stats = &card->netdev_stats;
1222 * spider_net_change_mtu - changes the MTU of an interface
1223 * @netdev: interface device structure
1224 * @new_mtu: new MTU value
1226 * returns 0 on success, <0 on failure
1229 spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1231 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1232 * and mtu is outbound only anyway */
1233 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1234 (new_mtu > SPIDER_NET_MAX_MTU) )
1236 netdev->mtu = new_mtu;
1241 * spider_net_set_mac - sets the MAC of an interface
1242 * @netdev: interface device structure
1243 * @ptr: pointer to new MAC address
1245 * Returns 0 on success, <0 on failure. Currently, we don't support this
1246 * and will always return EOPNOTSUPP.
1249 spider_net_set_mac(struct net_device *netdev, void *p)
1251 struct spider_net_card *card = netdev_priv(netdev);
1252 u32 macl, macu, regvalue;
1253 struct sockaddr *addr = p;
1255 if (!is_valid_ether_addr(addr->sa_data))
1256 return -EADDRNOTAVAIL;
1258 /* switch off GMACTPE and GMACRPE */
1259 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1260 regvalue &= ~((1 << 5) | (1 << 6));
1261 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1264 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1265 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1266 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1267 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1268 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1270 /* switch GMACTPE and GMACRPE back on */
1271 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1272 regvalue |= ((1 << 5) | (1 << 6));
1273 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1275 spider_net_set_promisc(card);
1277 /* look up, whether we have been successful */
1278 if (spider_net_get_mac_address(netdev))
1279 return -EADDRNOTAVAIL;
1280 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1281 return -EADDRNOTAVAIL;
1287 * spider_net_link_reset
1288 * @netdev: net device structure
1290 * This is called when the PHY_LINK signal is asserted. For the blade this is
1291 * not connected so we should never get here.
1295 spider_net_link_reset(struct net_device *netdev)
1298 struct spider_net_card *card = netdev_priv(netdev);
1300 del_timer_sync(&card->aneg_timer);
1302 /* clear interrupt, block further interrupts */
1303 spider_net_write_reg(card, SPIDER_NET_GMACST,
1304 spider_net_read_reg(card, SPIDER_NET_GMACST));
1305 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1307 /* reset phy and setup aneg */
1308 spider_net_setup_aneg(card);
1309 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1314 * spider_net_handle_error_irq - handles errors raised by an interrupt
1315 * @card: card structure
1316 * @status_reg: interrupt status register 0 (GHIINT0STS)
1318 * spider_net_handle_error_irq treats or ignores all error conditions
1319 * found when an interrupt is presented
1322 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1324 u32 error_reg1, error_reg2;
1328 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1329 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1331 /* check GHIINT0STS ************************************/
1333 for (i = 0; i < 32; i++)
1334 if (status_reg & (1<<i))
1337 /* let error_reg1 and error_reg2 evaluation decide, what to do
1338 case SPIDER_NET_PHYINT:
1339 case SPIDER_NET_GMAC2INT:
1340 case SPIDER_NET_GMAC1INT:
1341 case SPIDER_NET_GFIFOINT:
1342 case SPIDER_NET_DMACINT:
1343 case SPIDER_NET_GSYSINT:
1346 case SPIDER_NET_GIPSINT:
1350 case SPIDER_NET_GPWOPCMPINT:
1351 /* PHY write operation completed */
1354 case SPIDER_NET_GPROPCMPINT:
1355 /* PHY read operation completed */
1356 /* we don't use semaphores, as we poll for the completion
1357 * of the read operation in spider_net_read_phy. Should take
1361 case SPIDER_NET_GPWFFINT:
1362 /* PHY command queue full */
1363 if (netif_msg_intr(card))
1364 pr_err("PHY write queue full\n");
1368 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1369 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1370 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1372 case SPIDER_NET_GDTDEN0INT:
1373 /* someone has set TX_DMA_EN to 0 */
1377 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1378 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1379 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1380 case SPIDER_NET_GDADEN0INT:
1381 /* someone has set RX_DMA_EN to 0 */
1386 case SPIDER_NET_GDDFDCINT:
1387 case SPIDER_NET_GDCFDCINT:
1388 case SPIDER_NET_GDBFDCINT:
1389 case SPIDER_NET_GDAFDCINT:
1390 /* case SPIDER_NET_GDNMINT: not used. print a message */
1391 /* case SPIDER_NET_GCNMINT: not used. print a message */
1392 /* case SPIDER_NET_GBNMINT: not used. print a message */
1393 /* case SPIDER_NET_GANMINT: not used. print a message */
1394 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1399 case SPIDER_NET_GDTFDCINT:
1402 case SPIDER_NET_GTTEDINT:
1405 case SPIDER_NET_GDTDCEINT:
1406 /* chain end. If a descriptor should be sent, kick off
1408 if (card->tx_chain.tail != card->tx_chain.head)
1409 spider_net_kick_tx_dma(card);
1414 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1415 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1418 /* check GHIINT1STS ************************************/
1420 for (i = 0; i < 32; i++)
1421 if (error_reg1 & (1<<i))
1424 case SPIDER_NET_GTMFLLINT:
1425 if (netif_msg_intr(card) && net_ratelimit())
1426 pr_err("Spider TX RAM full\n");
1429 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1430 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1431 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1432 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1433 case SPIDER_NET_GRMFLLINT:
1434 if (netif_msg_intr(card) && net_ratelimit())
1435 pr_err("Spider RX RAM full, incoming packets "
1436 "might be discarded!\n");
1437 spider_net_rx_irq_off(card);
1438 netif_rx_schedule(card->netdev);
1442 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1443 case SPIDER_NET_GDTINVDINT:
1444 /* allrighty. tx from previous descr ok */
1449 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1450 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1451 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1452 case SPIDER_NET_GDADCEINT:
1453 if (netif_msg_intr(card) && net_ratelimit())
1454 pr_err("got descriptor chain end interrupt, "
1455 "restarting DMAC %c.\n",
1456 'D'-(i-SPIDER_NET_GDDDCEINT)/3);
1457 spider_net_refill_rx_chain(card);
1458 spider_net_enable_rxdmac(card);
1462 /* invalid descriptor */
1463 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1464 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1465 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1466 case SPIDER_NET_GDAINVDINT:
1467 /* could happen when rx chain is full */
1468 spider_net_refill_rx_chain(card);
1469 spider_net_enable_rxdmac(card);
1473 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1474 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1475 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1476 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1477 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1478 /* case SPIDER_NET_GDSERINT: problem, print a message */
1479 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1480 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1481 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1482 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1483 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1489 /* check GHIINT2STS ************************************/
1491 for (i = 0; i < 32; i++)
1492 if (error_reg2 & (1<<i))
1495 /* there is nothing we can (want to) do at this time. Log a
1496 * message, we can switch on and off the specific values later on
1497 case SPIDER_NET_GPROPERINT:
1498 case SPIDER_NET_GMCTCRSNGINT:
1499 case SPIDER_NET_GMCTLCOLINT:
1500 case SPIDER_NET_GMCTTMOTINT:
1501 case SPIDER_NET_GMCRCAERINT:
1502 case SPIDER_NET_GMCRCALERINT:
1503 case SPIDER_NET_GMCRALNERINT:
1504 case SPIDER_NET_GMCROVRINT:
1505 case SPIDER_NET_GMCRRNTINT:
1506 case SPIDER_NET_GMCRRXERINT:
1507 case SPIDER_NET_GTITCSERINT:
1508 case SPIDER_NET_GTIFMTERINT:
1509 case SPIDER_NET_GTIPKTRVKINT:
1510 case SPIDER_NET_GTISPINGINT:
1511 case SPIDER_NET_GTISADNGINT:
1512 case SPIDER_NET_GTISPDNGINT:
1513 case SPIDER_NET_GRIFMTERINT:
1514 case SPIDER_NET_GRIPKTRVKINT:
1515 case SPIDER_NET_GRISPINGINT:
1516 case SPIDER_NET_GRISADNGINT:
1517 case SPIDER_NET_GRISPDNGINT:
1524 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
1525 pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, "
1526 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1528 status_reg, error_reg1, error_reg2);
1530 /* clear interrupt sources */
1531 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1532 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1536 * spider_net_interrupt - interrupt handler for spider_net
1537 * @irq: interupt number
1538 * @ptr: pointer to net_device
1539 * @regs: PU registers
1541 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1542 * interrupt found raised by card.
1544 * This is the interrupt handler, that turns off
1545 * interrupts for this device and makes the stack poll the driver
1548 spider_net_interrupt(int irq, void *ptr)
1550 struct net_device *netdev = ptr;
1551 struct spider_net_card *card = netdev_priv(netdev);
1554 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1559 if (status_reg & SPIDER_NET_RXINT ) {
1560 spider_net_rx_irq_off(card);
1561 netif_rx_schedule(netdev);
1563 if (status_reg & SPIDER_NET_TXINT)
1564 netif_rx_schedule(netdev);
1566 if (status_reg & SPIDER_NET_LINKINT)
1567 spider_net_link_reset(netdev);
1569 if (status_reg & SPIDER_NET_ERRINT )
1570 spider_net_handle_error_irq(card, status_reg);
1572 /* clear interrupt sources */
1573 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1578 #ifdef CONFIG_NET_POLL_CONTROLLER
1580 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1581 * @netdev: interface device structure
1583 * see Documentation/networking/netconsole.txt
1586 spider_net_poll_controller(struct net_device *netdev)
1588 disable_irq(netdev->irq);
1589 spider_net_interrupt(netdev->irq, netdev);
1590 enable_irq(netdev->irq);
1592 #endif /* CONFIG_NET_POLL_CONTROLLER */
1595 * spider_net_init_card - initializes the card
1596 * @card: card structure
1598 * spider_net_init_card initializes the card so that other registers can
1602 spider_net_init_card(struct spider_net_card *card)
1604 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1605 SPIDER_NET_CKRCTRL_STOP_VALUE);
1607 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1608 SPIDER_NET_CKRCTRL_RUN_VALUE);
1610 /* trigger ETOMOD signal */
1611 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1612 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1617 * spider_net_enable_card - enables the card by setting all kinds of regs
1618 * @card: card structure
1620 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1623 spider_net_enable_card(struct spider_net_card *card)
1626 /* the following array consists of (register),(value) pairs
1627 * that are set in this function. A register of 0 ends the list */
1629 { SPIDER_NET_GRESUMINTNUM, 0 },
1630 { SPIDER_NET_GREINTNUM, 0 },
1632 /* set interrupt frame number registers */
1633 /* clear the single DMA engine registers first */
1634 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1635 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1636 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1637 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1638 /* then set, what we really need */
1639 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1641 /* timer counter registers and stuff */
1642 { SPIDER_NET_GFREECNNUM, 0 },
1643 { SPIDER_NET_GONETIMENUM, 0 },
1644 { SPIDER_NET_GTOUTFRMNUM, 0 },
1646 /* RX mode setting */
1647 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1648 /* TX mode setting */
1649 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1650 /* IPSEC mode setting */
1651 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1653 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1655 { SPIDER_NET_GMRWOLCTRL, 0 },
1656 { SPIDER_NET_GTESTMD, 0x10000000 },
1657 { SPIDER_NET_GTTQMSK, 0x00400040 },
1659 { SPIDER_NET_GMACINTEN, 0 },
1661 /* flow control stuff */
1662 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1663 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1665 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1670 while (regs[i][0]) {
1671 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1675 /* clear unicast filter table entries 1 to 14 */
1676 for (i = 1; i <= 14; i++) {
1677 spider_net_write_reg(card,
1678 SPIDER_NET_GMRUAFILnR + i * 8,
1680 spider_net_write_reg(card,
1681 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1685 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1687 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1689 /* set chain tail adress for RX chains and
1691 spider_net_enable_rxchtails(card);
1692 spider_net_enable_rxdmac(card);
1694 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1696 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1697 SPIDER_NET_LENLMT_VALUE);
1698 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1699 SPIDER_NET_OPMODE_VALUE);
1701 /* set interrupt mask registers */
1702 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1703 SPIDER_NET_INT0_MASK_VALUE);
1704 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1705 SPIDER_NET_INT1_MASK_VALUE);
1706 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1707 SPIDER_NET_INT2_MASK_VALUE);
1709 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1710 SPIDER_NET_GDTBSTA);
1714 * spider_net_download_firmware - loads firmware into the adapter
1715 * @card: card structure
1716 * @firmware_ptr: pointer to firmware data
1718 * spider_net_download_firmware loads the firmware data into the
1719 * adapter. It assumes the length etc. to be allright.
1722 spider_net_download_firmware(struct spider_net_card *card,
1723 const void *firmware_ptr)
1726 const u32 *fw_ptr = firmware_ptr;
1728 /* stop sequencers */
1729 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1730 SPIDER_NET_STOP_SEQ_VALUE);
1732 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1734 spider_net_write_reg(card,
1735 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1736 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1737 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1738 sequencer * 8, *fw_ptr);
1743 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1746 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1747 SPIDER_NET_RUN_SEQ_VALUE);
1753 * spider_net_init_firmware - reads in firmware parts
1754 * @card: card structure
1756 * Returns 0 on success, <0 on failure
1758 * spider_net_init_firmware opens the sequencer firmware and does some basic
1759 * checks. This function opens and releases the firmware structure. A call
1760 * to download the firmware is performed before the release.
1764 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1765 * the program for each sequencer. Use the command
1766 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1767 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1768 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1770 * to generate spider_fw.bin, if you have sequencer programs with something
1771 * like the following contents for each sequencer:
1772 * <ONE LINE COMMENT>
1773 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1774 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1776 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1779 spider_net_init_firmware(struct spider_net_card *card)
1781 struct firmware *firmware = NULL;
1782 struct device_node *dn;
1783 const u8 *fw_prop = NULL;
1787 if (request_firmware((const struct firmware **)&firmware,
1788 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1789 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1790 netif_msg_probe(card) ) {
1791 pr_err("Incorrect size of spidernet firmware in " \
1792 "filesystem. Looking in host firmware...\n");
1795 err = spider_net_download_firmware(card, firmware->data);
1797 release_firmware(firmware);
1805 dn = pci_device_to_OF_node(card->pdev);
1809 fw_prop = get_property(dn, "firmware", &fw_size);
1813 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1814 netif_msg_probe(card) ) {
1815 pr_err("Incorrect size of spidernet firmware in " \
1820 err = spider_net_download_firmware(card, fw_prop);
1825 if (netif_msg_probe(card))
1826 pr_err("Couldn't find spidernet firmware in filesystem " \
1827 "or host firmware\n");
1832 * spider_net_open - called upon ifonfig up
1833 * @netdev: interface device structure
1835 * returns 0 on success, <0 on failure
1837 * spider_net_open allocates all the descriptors and memory needed for
1838 * operation, sets up multicast list and enables interrupts
1841 spider_net_open(struct net_device *netdev)
1843 struct spider_net_card *card = netdev_priv(netdev);
1846 result = spider_net_init_firmware(card);
1848 goto init_firmware_failed;
1850 /* start probing with copper */
1851 spider_net_setup_aneg(card);
1852 if (card->phy.def->phy_id)
1853 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1855 result = spider_net_init_chain(card, &card->tx_chain);
1857 goto alloc_tx_failed;
1858 card->low_watermark = NULL;
1860 result = spider_net_init_chain(card, &card->rx_chain);
1862 goto alloc_rx_failed;
1864 /* Allocate rx skbs */
1865 if (spider_net_alloc_rx_skbs(card))
1866 goto alloc_skbs_failed;
1868 spider_net_set_multi(netdev);
1870 /* further enhancement: setup hw vlan, if needed */
1873 if (request_irq(netdev->irq, spider_net_interrupt,
1874 IRQF_SHARED, netdev->name, netdev))
1875 goto register_int_failed;
1877 spider_net_enable_card(card);
1879 netif_start_queue(netdev);
1880 netif_carrier_on(netdev);
1881 netif_poll_enable(netdev);
1885 register_int_failed:
1886 spider_net_free_rx_chain_contents(card);
1888 spider_net_free_chain(card, &card->rx_chain);
1890 spider_net_free_chain(card, &card->tx_chain);
1892 del_timer_sync(&card->aneg_timer);
1893 init_firmware_failed:
1898 * spider_net_link_phy
1899 * @data: used for pointer to card structure
1902 static void spider_net_link_phy(unsigned long data)
1904 struct spider_net_card *card = (struct spider_net_card *)data;
1905 struct mii_phy *phy = &card->phy;
1907 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
1908 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
1910 pr_info("%s: link is down trying to bring it up\n", card->netdev->name);
1912 switch (phy->medium) {
1914 /* enable fiber with autonegotiation first */
1915 if (phy->def->ops->enable_fiber)
1916 phy->def->ops->enable_fiber(phy, 1);
1917 phy->medium = GMII_FIBER;
1921 /* fiber didn't come up, try to disable fiber autoneg */
1922 if (phy->def->ops->enable_fiber)
1923 phy->def->ops->enable_fiber(phy, 0);
1924 phy->medium = GMII_UNKNOWN;
1928 /* copper, fiber with and without failed,
1929 * retry from beginning */
1930 spider_net_setup_aneg(card);
1931 phy->medium = GMII_COPPER;
1935 card->aneg_count = 0;
1936 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1940 /* link still not up, try again later */
1941 if (!(phy->def->ops->poll_link(phy))) {
1943 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1947 /* link came up, get abilities */
1948 phy->def->ops->read_link(phy);
1950 spider_net_write_reg(card, SPIDER_NET_GMACST,
1951 spider_net_read_reg(card, SPIDER_NET_GMACST));
1952 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
1954 if (phy->speed == 1000)
1955 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
1957 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
1959 card->aneg_count = 0;
1961 pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n",
1962 phy->def->name, phy->speed, phy->duplex==1 ? "Full" : "Half",
1963 phy->autoneg==1 ? "" : "no ");
1969 * spider_net_setup_phy - setup PHY
1970 * @card: card structure
1972 * returns 0 on success, <0 on failure
1974 * spider_net_setup_phy is used as part of spider_net_probe.
1977 spider_net_setup_phy(struct spider_net_card *card)
1979 struct mii_phy *phy = &card->phy;
1981 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1982 SPIDER_NET_DMASEL_VALUE);
1983 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1984 SPIDER_NET_PHY_CTRL_VALUE);
1986 phy->dev = card->netdev;
1987 phy->mdio_read = spider_net_read_phy;
1988 phy->mdio_write = spider_net_write_phy;
1990 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
1992 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
1993 if (id != 0x0000 && id != 0xffff) {
1994 if (!mii_phy_probe(phy, phy->mii_id)) {
1995 pr_info("Found %s.\n", phy->def->name);
2005 * spider_net_workaround_rxramfull - work around firmware bug
2006 * @card: card structure
2011 spider_net_workaround_rxramfull(struct spider_net_card *card)
2013 int i, sequencer = 0;
2016 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2017 SPIDER_NET_CKRCTRL_RUN_VALUE);
2019 /* empty sequencer data */
2020 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2022 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
2023 sequencer * 8, 0x0);
2024 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
2025 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2026 sequencer * 8, 0x0);
2030 /* set sequencer operation */
2031 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2034 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2035 SPIDER_NET_CKRCTRL_STOP_VALUE);
2039 * spider_net_stop - called upon ifconfig down
2040 * @netdev: interface device structure
2045 spider_net_stop(struct net_device *netdev)
2047 struct spider_net_card *card = netdev_priv(netdev);
2049 netif_poll_disable(netdev);
2050 netif_carrier_off(netdev);
2051 netif_stop_queue(netdev);
2052 del_timer_sync(&card->tx_timer);
2053 del_timer_sync(&card->aneg_timer);
2055 /* disable/mask all interrupts */
2056 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
2057 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
2058 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
2059 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
2061 free_irq(netdev->irq, netdev);
2063 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2064 SPIDER_NET_DMA_TX_FEND_VALUE);
2066 /* turn off DMA, force end */
2067 spider_net_disable_rxdmac(card);
2069 /* release chains */
2070 spider_net_release_tx_chain(card, 1);
2071 spider_net_free_rx_chain_contents(card);
2073 spider_net_free_chain(card, &card->tx_chain);
2074 spider_net_free_chain(card, &card->rx_chain);
2080 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2081 * function (to be called not under interrupt status)
2082 * @data: data, is interface device structure
2084 * called as task when tx hangs, resets interface (if interface is up)
2087 spider_net_tx_timeout_task(struct work_struct *work)
2089 struct spider_net_card *card =
2090 container_of(work, struct spider_net_card, tx_timeout_task);
2091 struct net_device *netdev = card->netdev;
2093 if (!(netdev->flags & IFF_UP))
2096 netif_device_detach(netdev);
2097 spider_net_stop(netdev);
2099 spider_net_workaround_rxramfull(card);
2100 spider_net_init_card(card);
2102 if (spider_net_setup_phy(card))
2105 spider_net_open(netdev);
2106 spider_net_kick_tx_dma(card);
2107 netif_device_attach(netdev);
2110 atomic_dec(&card->tx_timeout_task_counter);
2114 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2115 * @netdev: interface device structure
2117 * called, if tx hangs. Schedules a task that resets the interface
2120 spider_net_tx_timeout(struct net_device *netdev)
2122 struct spider_net_card *card;
2124 card = netdev_priv(netdev);
2125 atomic_inc(&card->tx_timeout_task_counter);
2126 if (netdev->flags & IFF_UP)
2127 schedule_work(&card->tx_timeout_task);
2129 atomic_dec(&card->tx_timeout_task_counter);
2130 card->spider_stats.tx_timeouts++;
2134 * spider_net_setup_netdev_ops - initialization of net_device operations
2135 * @netdev: net_device structure
2137 * fills out function pointers in the net_device structure
2140 spider_net_setup_netdev_ops(struct net_device *netdev)
2142 netdev->open = &spider_net_open;
2143 netdev->stop = &spider_net_stop;
2144 netdev->hard_start_xmit = &spider_net_xmit;
2145 netdev->get_stats = &spider_net_get_stats;
2146 netdev->set_multicast_list = &spider_net_set_multi;
2147 netdev->set_mac_address = &spider_net_set_mac;
2148 netdev->change_mtu = &spider_net_change_mtu;
2149 netdev->do_ioctl = &spider_net_do_ioctl;
2151 netdev->tx_timeout = &spider_net_tx_timeout;
2152 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2154 netdev->poll = &spider_net_poll;
2155 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
2157 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
2158 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
2159 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
2160 #ifdef CONFIG_NET_POLL_CONTROLLER
2161 /* poll controller */
2162 netdev->poll_controller = &spider_net_poll_controller;
2163 #endif /* CONFIG_NET_POLL_CONTROLLER */
2165 netdev->ethtool_ops = &spider_net_ethtool_ops;
2169 * spider_net_setup_netdev - initialization of net_device
2170 * @card: card structure
2172 * Returns 0 on success or <0 on failure
2174 * spider_net_setup_netdev initializes the net_device structure
2177 spider_net_setup_netdev(struct spider_net_card *card)
2180 struct net_device *netdev = card->netdev;
2181 struct device_node *dn;
2182 struct sockaddr addr;
2185 SET_MODULE_OWNER(netdev);
2186 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2188 pci_set_drvdata(card->pdev, netdev);
2190 init_timer(&card->tx_timer);
2191 card->tx_timer.function =
2192 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2193 card->tx_timer.data = (unsigned long) card;
2194 netdev->irq = card->pdev->irq;
2196 card->aneg_count = 0;
2197 init_timer(&card->aneg_timer);
2198 card->aneg_timer.function = spider_net_link_phy;
2199 card->aneg_timer.data = (unsigned long) card;
2201 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2203 card->tx_chain.num_desc = tx_descriptors;
2204 card->rx_chain.num_desc = rx_descriptors;
2206 spider_net_setup_netdev_ops(netdev);
2208 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
2209 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2210 * NETIF_F_HW_VLAN_FILTER */
2212 netdev->irq = card->pdev->irq;
2214 dn = pci_device_to_OF_node(card->pdev);
2218 mac = get_property(dn, "local-mac-address", NULL);
2221 memcpy(addr.sa_data, mac, ETH_ALEN);
2223 result = spider_net_set_mac(netdev, &addr);
2224 if ((result) && (netif_msg_probe(card)))
2225 pr_err("Failed to set MAC address: %i\n", result);
2227 result = register_netdev(netdev);
2229 if (netif_msg_probe(card))
2230 pr_err("Couldn't register net_device: %i\n",
2235 if (netif_msg_probe(card))
2236 pr_info("Initialized device %s.\n", netdev->name);
2242 * spider_net_alloc_card - allocates net_device and card structure
2244 * returns the card structure or NULL in case of errors
2246 * the card and net_device structures are linked to each other
2248 static struct spider_net_card *
2249 spider_net_alloc_card(void)
2251 struct net_device *netdev;
2252 struct spider_net_card *card;
2254 netdev = alloc_etherdev(sizeof(struct spider_net_card));
2258 card = netdev_priv(netdev);
2259 card->netdev = netdev;
2260 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2261 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
2262 init_waitqueue_head(&card->waitq);
2263 atomic_set(&card->tx_timeout_task_counter, 0);
2269 * spider_net_undo_pci_setup - releases PCI ressources
2270 * @card: card structure
2272 * spider_net_undo_pci_setup releases the mapped regions
2275 spider_net_undo_pci_setup(struct spider_net_card *card)
2277 iounmap(card->regs);
2278 pci_release_regions(card->pdev);
2282 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2283 * @card: card structure
2286 * Returns the card structure or NULL if any errors occur
2288 * spider_net_setup_pci_dev initializes pdev and together with the
2289 * functions called in spider_net_open configures the device so that
2290 * data can be transferred over it
2291 * The net_device structure is attached to the card structure, if the
2292 * function returns without error.
2294 static struct spider_net_card *
2295 spider_net_setup_pci_dev(struct pci_dev *pdev)
2297 struct spider_net_card *card;
2298 unsigned long mmio_start, mmio_len;
2300 if (pci_enable_device(pdev)) {
2301 pr_err("Couldn't enable PCI device\n");
2305 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2306 pr_err("Couldn't find proper PCI device base address.\n");
2307 goto out_disable_dev;
2310 if (pci_request_regions(pdev, spider_net_driver_name)) {
2311 pr_err("Couldn't obtain PCI resources, aborting.\n");
2312 goto out_disable_dev;
2315 pci_set_master(pdev);
2317 card = spider_net_alloc_card();
2319 pr_err("Couldn't allocate net_device structure, "
2321 goto out_release_regions;
2325 /* fetch base address and length of first resource */
2326 mmio_start = pci_resource_start(pdev, 0);
2327 mmio_len = pci_resource_len(pdev, 0);
2329 card->netdev->mem_start = mmio_start;
2330 card->netdev->mem_end = mmio_start + mmio_len;
2331 card->regs = ioremap(mmio_start, mmio_len);
2334 pr_err("Couldn't obtain PCI resources, aborting.\n");
2335 goto out_release_regions;
2340 out_release_regions:
2341 pci_release_regions(pdev);
2343 pci_disable_device(pdev);
2344 pci_set_drvdata(pdev, NULL);
2349 * spider_net_probe - initialization of a device
2351 * @ent: entry in the device id list
2353 * Returns 0 on success, <0 on failure
2355 * spider_net_probe initializes pdev and registers a net_device
2356 * structure for it. After that, the device can be ifconfig'ed up
2358 static int __devinit
2359 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2362 struct spider_net_card *card;
2364 card = spider_net_setup_pci_dev(pdev);
2368 spider_net_workaround_rxramfull(card);
2369 spider_net_init_card(card);
2371 err = spider_net_setup_phy(card);
2375 err = spider_net_setup_netdev(card);
2382 spider_net_undo_pci_setup(card);
2383 free_netdev(card->netdev);
2389 * spider_net_remove - removal of a device
2392 * Returns 0 on success, <0 on failure
2394 * spider_net_remove is called to remove the device and unregisters the
2397 static void __devexit
2398 spider_net_remove(struct pci_dev *pdev)
2400 struct net_device *netdev;
2401 struct spider_net_card *card;
2403 netdev = pci_get_drvdata(pdev);
2404 card = netdev_priv(netdev);
2406 wait_event(card->waitq,
2407 atomic_read(&card->tx_timeout_task_counter) == 0);
2409 unregister_netdev(netdev);
2411 /* switch off card */
2412 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2413 SPIDER_NET_CKRCTRL_STOP_VALUE);
2414 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2415 SPIDER_NET_CKRCTRL_RUN_VALUE);
2417 spider_net_undo_pci_setup(card);
2418 free_netdev(netdev);
2421 static struct pci_driver spider_net_driver = {
2422 .name = spider_net_driver_name,
2423 .id_table = spider_net_pci_tbl,
2424 .probe = spider_net_probe,
2425 .remove = __devexit_p(spider_net_remove)
2429 * spider_net_init - init function when the driver is loaded
2431 * spider_net_init registers the device driver
2433 static int __init spider_net_init(void)
2435 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2437 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2438 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2439 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2441 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2442 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2443 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2445 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2446 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2447 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2449 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2450 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2451 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2454 return pci_register_driver(&spider_net_driver);
2458 * spider_net_cleanup - exit function when driver is unloaded
2460 * spider_net_cleanup unregisters the device driver
2462 static void __exit spider_net_cleanup(void)
2464 pci_unregister_driver(&spider_net_driver);
2467 module_init(spider_net_init);
2468 module_exit(spider_net_cleanup);