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;
180 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
181 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
183 if (bmsr & BMSR_10HALF)
184 advertise |= ADVERTISED_10baseT_Half;
185 if (bmsr & BMSR_10FULL)
186 advertise |= ADVERTISED_10baseT_Full;
187 if (bmsr & BMSR_100HALF)
188 advertise |= ADVERTISED_100baseT_Half;
189 if (bmsr & BMSR_100FULL)
190 advertise |= ADVERTISED_100baseT_Full;
192 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
193 advertise |= SUPPORTED_1000baseT_Full;
194 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
195 advertise |= SUPPORTED_1000baseT_Half;
197 mii_phy_probe(phy, phy->mii_id);
198 phy->def->ops->setup_aneg(phy, advertise);
203 * spider_net_rx_irq_off - switch off rx irq on this spider card
204 * @card: device structure
206 * switches off rx irq by masking them out in the GHIINTnMSK register
209 spider_net_rx_irq_off(struct spider_net_card *card)
213 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
214 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
218 * spider_net_rx_irq_on - switch on rx irq on this spider card
219 * @card: device structure
221 * switches on rx irq by enabling them in the GHIINTnMSK register
224 spider_net_rx_irq_on(struct spider_net_card *card)
228 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
229 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
233 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
234 * @card: card structure
236 * spider_net_set_promisc sets the unicast destination address filter and
237 * thus either allows for non-promisc mode or promisc mode
240 spider_net_set_promisc(struct spider_net_card *card)
243 struct net_device *netdev = card->netdev;
245 if (netdev->flags & IFF_PROMISC) {
246 /* clear destination entry 0 */
247 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
248 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
249 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
250 SPIDER_NET_PROMISC_VALUE);
252 macu = netdev->dev_addr[0];
254 macu |= netdev->dev_addr[1];
255 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
257 macu |= SPIDER_NET_UA_DESCR_VALUE;
258 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
259 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
260 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
261 SPIDER_NET_NONPROMISC_VALUE);
266 * spider_net_get_mac_address - read mac address from spider card
267 * @card: device structure
269 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
272 spider_net_get_mac_address(struct net_device *netdev)
274 struct spider_net_card *card = netdev_priv(netdev);
277 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
278 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
280 netdev->dev_addr[0] = (macu >> 24) & 0xff;
281 netdev->dev_addr[1] = (macu >> 16) & 0xff;
282 netdev->dev_addr[2] = (macu >> 8) & 0xff;
283 netdev->dev_addr[3] = macu & 0xff;
284 netdev->dev_addr[4] = (macl >> 8) & 0xff;
285 netdev->dev_addr[5] = macl & 0xff;
287 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
294 * spider_net_get_descr_status -- returns the status of a descriptor
295 * @descr: descriptor to look at
297 * returns the status as in the dmac_cmd_status field of the descriptor
300 spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
302 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
306 * spider_net_free_chain - free descriptor chain
307 * @card: card structure
308 * @chain: address of chain
312 spider_net_free_chain(struct spider_net_card *card,
313 struct spider_net_descr_chain *chain)
315 struct spider_net_descr *descr;
320 descr->hwdescr->next_descr_addr = 0;
322 } while (descr != chain->ring);
324 dma_free_coherent(&card->pdev->dev, chain->num_desc,
325 chain->hwring, chain->dma_addr);
329 * spider_net_init_chain - alloc and link descriptor chain
330 * @card: card structure
331 * @chain: address of chain
333 * We manage a circular list that mirrors the hardware structure,
334 * except that the hardware uses bus addresses.
336 * Returns 0 on success, <0 on failure
339 spider_net_init_chain(struct spider_net_card *card,
340 struct spider_net_descr_chain *chain)
343 struct spider_net_descr *descr;
344 struct spider_net_hw_descr *hwdescr;
348 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
350 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
351 &chain->dma_addr, GFP_KERNEL);
356 memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr));
358 /* Set up the hardware pointers in each descriptor */
360 hwdescr = chain->hwring;
361 buf = chain->dma_addr;
362 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
363 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
364 hwdescr->next_descr_addr = 0;
366 descr->hwdescr = hwdescr;
367 descr->bus_addr = buf;
368 descr->next = descr + 1;
369 descr->prev = descr - 1;
371 buf += sizeof(struct spider_net_hw_descr);
373 /* do actual circular list */
374 (descr-1)->next = chain->ring;
375 chain->ring->prev = descr-1;
377 spin_lock_init(&chain->lock);
378 chain->head = chain->ring;
379 chain->tail = chain->ring;
384 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
385 * @card: card structure
387 * returns 0 on success, <0 on failure
390 spider_net_free_rx_chain_contents(struct spider_net_card *card)
392 struct spider_net_descr *descr;
394 descr = card->rx_chain.head;
397 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
398 SPIDER_NET_MAX_FRAME,
399 PCI_DMA_BIDIRECTIONAL);
400 dev_kfree_skb(descr->skb);
404 } while (descr != card->rx_chain.head);
408 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
409 * @card: card structure
410 * @descr: descriptor to re-init
412 * Return 0 on succes, <0 on failure.
414 * Allocates a new rx skb, iommu-maps it and attaches it to the
415 * descriptor. Mark the descriptor as activated, ready-to-use.
418 spider_net_prepare_rx_descr(struct spider_net_card *card,
419 struct spider_net_descr *descr)
421 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
426 /* we need to round up the buffer size to a multiple of 128 */
427 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
428 (~(SPIDER_NET_RXBUF_ALIGN - 1));
430 /* and we need to have it 128 byte aligned, therefore we allocate a
432 /* allocate an skb */
433 descr->skb = netdev_alloc_skb(card->netdev,
434 bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
436 if (netif_msg_rx_err(card) && net_ratelimit())
437 pr_err("Not enough memory to allocate rx buffer\n");
438 card->spider_stats.alloc_rx_skb_error++;
441 hwdescr->buf_size = bufsize;
442 hwdescr->result_size = 0;
443 hwdescr->valid_size = 0;
444 hwdescr->data_status = 0;
445 hwdescr->data_error = 0;
447 offset = ((unsigned long)descr->skb->data) &
448 (SPIDER_NET_RXBUF_ALIGN - 1);
450 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
451 /* iommu-map the skb */
452 buf = pci_map_single(card->pdev, descr->skb->data,
453 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
454 if (pci_dma_mapping_error(buf)) {
455 dev_kfree_skb_any(descr->skb);
457 if (netif_msg_rx_err(card) && net_ratelimit())
458 pr_err("Could not iommu-map rx buffer\n");
459 card->spider_stats.rx_iommu_map_error++;
460 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
462 hwdescr->buf_addr = buf;
463 hwdescr->next_descr_addr = 0;
465 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
466 SPIDER_NET_DMAC_NOINTR_COMPLETE;
469 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
476 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
477 * @card: card structure
479 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
480 * chip by writing to the appropriate register. DMA is enabled in
481 * spider_net_enable_rxdmac.
484 spider_net_enable_rxchtails(struct spider_net_card *card)
486 /* assume chain is aligned correctly */
487 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
488 card->rx_chain.tail->bus_addr);
492 * spider_net_enable_rxdmac - enables a receive DMA controller
493 * @card: card structure
495 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
496 * in the GDADMACCNTR register
499 spider_net_enable_rxdmac(struct spider_net_card *card)
502 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
503 SPIDER_NET_DMA_RX_VALUE);
507 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
508 * @card: card structure
510 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
513 spider_net_refill_rx_chain(struct spider_net_card *card)
515 struct spider_net_descr_chain *chain = &card->rx_chain;
518 /* one context doing the refill (and a second context seeing that
519 * and omitting it) is ok. If called by NAPI, we'll be called again
520 * as spider_net_decode_one_descr is called several times. If some
521 * interrupt calls us, the NAPI is about to clean up anyway. */
522 if (!spin_trylock_irqsave(&chain->lock, flags))
525 while (spider_net_get_descr_status(chain->head->hwdescr) ==
526 SPIDER_NET_DESCR_NOT_IN_USE) {
527 if (spider_net_prepare_rx_descr(card, chain->head))
529 chain->head = chain->head->next;
532 spin_unlock_irqrestore(&chain->lock, flags);
536 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
537 * @card: card structure
539 * Returns 0 on success, <0 on failure.
542 spider_net_alloc_rx_skbs(struct spider_net_card *card)
545 struct spider_net_descr_chain *chain;
549 chain = &card->rx_chain;
550 /* Put at least one buffer into the chain. if this fails,
551 * we've got a problem. If not, spider_net_refill_rx_chain
552 * will do the rest at the end of this function. */
553 if (spider_net_prepare_rx_descr(card, chain->head))
556 chain->head = chain->head->next;
558 /* This will allocate the rest of the rx buffers;
559 * if not, it's business as usual later on. */
560 spider_net_refill_rx_chain(card);
561 spider_net_enable_rxdmac(card);
565 spider_net_free_rx_chain_contents(card);
570 * spider_net_get_multicast_hash - generates hash for multicast filter table
571 * @addr: multicast address
573 * returns the hash value.
575 * spider_net_get_multicast_hash calculates a hash value for a given multicast
576 * address, that is used to set the multicast filter tables
579 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
583 char addr_for_crc[ETH_ALEN] = { 0, };
586 for (i = 0; i < ETH_ALEN * 8; i++) {
587 bit = (addr[i / 8] >> (i % 8)) & 1;
588 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
591 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
602 * spider_net_set_multi - sets multicast addresses and promisc flags
603 * @netdev: interface device structure
605 * spider_net_set_multi configures multicast addresses as needed for the
606 * netdev interface. It also sets up multicast, allmulti and promisc
607 * flags appropriately
610 spider_net_set_multi(struct net_device *netdev)
612 struct dev_mc_list *mc;
616 struct spider_net_card *card = netdev_priv(netdev);
617 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
620 spider_net_set_promisc(card);
622 if (netdev->flags & IFF_ALLMULTI) {
623 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
629 /* well, we know, what the broadcast hash value is: it's xfd
630 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
631 set_bit(0xfd, bitmask);
633 for (mc = netdev->mc_list; mc; mc = mc->next) {
634 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
635 set_bit(hash, bitmask);
639 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
641 if (test_bit(i * 4, bitmask))
644 if (test_bit(i * 4 + 1, bitmask))
647 if (test_bit(i * 4 + 2, bitmask))
650 if (test_bit(i * 4 + 3, bitmask))
653 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
658 * spider_net_disable_rxdmac - disables the receive DMA controller
659 * @card: card structure
661 * spider_net_disable_rxdmac terminates processing on the DMA controller by
662 * turing off DMA and issueing a force end
665 spider_net_disable_rxdmac(struct spider_net_card *card)
667 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
668 SPIDER_NET_DMA_RX_FEND_VALUE);
672 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
673 * @card: card structure
674 * @descr: descriptor structure to fill out
675 * @skb: packet to use
677 * returns 0 on success, <0 on failure.
679 * fills out the descriptor structure with skb data and len. Copies data,
680 * if needed (32bit DMA!)
683 spider_net_prepare_tx_descr(struct spider_net_card *card,
686 struct spider_net_descr_chain *chain = &card->tx_chain;
687 struct spider_net_descr *descr;
688 struct spider_net_hw_descr *hwdescr;
692 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
693 if (pci_dma_mapping_error(buf)) {
694 if (netif_msg_tx_err(card) && net_ratelimit())
695 pr_err("could not iommu-map packet (%p, %i). "
696 "Dropping packet\n", skb->data, skb->len);
697 card->spider_stats.tx_iommu_map_error++;
701 spin_lock_irqsave(&chain->lock, flags);
702 descr = card->tx_chain.head;
703 if (descr->next == chain->tail->prev) {
704 spin_unlock_irqrestore(&chain->lock, flags);
705 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
708 hwdescr = descr->hwdescr;
709 chain->head = descr->next;
712 hwdescr->buf_addr = buf;
713 hwdescr->buf_size = skb->len;
714 hwdescr->next_descr_addr = 0;
715 hwdescr->data_status = 0;
717 hwdescr->dmac_cmd_status =
718 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
719 spin_unlock_irqrestore(&chain->lock, flags);
721 if (skb->protocol == htons(ETH_P_IP) && skb->ip_summed == CHECKSUM_PARTIAL)
722 switch (ip_hdr(skb)->protocol) {
724 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
727 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
731 /* Chain the bus address, so that the DMA engine finds this descr. */
733 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
735 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
740 spider_net_set_low_watermark(struct spider_net_card *card)
742 struct spider_net_descr *descr = card->tx_chain.tail;
743 struct spider_net_hw_descr *hwdescr;
749 /* Measure the length of the queue. Measurement does not
750 * need to be precise -- does not need a lock. */
751 while (descr != card->tx_chain.head) {
752 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
753 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
759 /* If TX queue is short, don't even bother with interrupts */
760 if (cnt < card->tx_chain.num_desc/4)
763 /* Set low-watermark 3/4th's of the way into the queue. */
764 descr = card->tx_chain.tail;
769 /* Set the new watermark, clear the old watermark */
770 spin_lock_irqsave(&card->tx_chain.lock, flags);
771 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
772 if (card->low_watermark && card->low_watermark != descr) {
773 hwdescr = card->low_watermark->hwdescr;
774 hwdescr->dmac_cmd_status =
775 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
777 card->low_watermark = descr;
778 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
783 * spider_net_release_tx_chain - processes sent tx descriptors
784 * @card: adapter structure
785 * @brutal: if set, don't care about whether descriptor seems to be in use
787 * returns 0 if the tx ring is empty, otherwise 1.
789 * spider_net_release_tx_chain releases the tx descriptors that spider has
790 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
791 * If some other context is calling this function, we return 1 so that we're
792 * scheduled again (if we were scheduled) and will not loose initiative.
795 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
797 struct spider_net_descr_chain *chain = &card->tx_chain;
798 struct spider_net_descr *descr;
799 struct spider_net_hw_descr *hwdescr;
806 spin_lock_irqsave(&chain->lock, flags);
807 if (chain->tail == chain->head) {
808 spin_unlock_irqrestore(&chain->lock, flags);
812 hwdescr = descr->hwdescr;
814 status = spider_net_get_descr_status(hwdescr);
816 case SPIDER_NET_DESCR_COMPLETE:
817 card->netdev_stats.tx_packets++;
818 card->netdev_stats.tx_bytes += descr->skb->len;
821 case SPIDER_NET_DESCR_CARDOWNED:
823 spin_unlock_irqrestore(&chain->lock, flags);
827 /* fallthrough, if we release the descriptors
828 * brutally (then we don't care about
829 * SPIDER_NET_DESCR_CARDOWNED) */
831 case SPIDER_NET_DESCR_RESPONSE_ERROR:
832 case SPIDER_NET_DESCR_PROTECTION_ERROR:
833 case SPIDER_NET_DESCR_FORCE_END:
834 if (netif_msg_tx_err(card))
835 pr_err("%s: forcing end of tx descriptor "
836 "with status x%02x\n",
837 card->netdev->name, status);
838 card->netdev_stats.tx_errors++;
842 card->netdev_stats.tx_dropped++;
844 spin_unlock_irqrestore(&chain->lock, flags);
849 chain->tail = descr->next;
850 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
853 buf_addr = hwdescr->buf_addr;
854 spin_unlock_irqrestore(&chain->lock, flags);
858 pci_unmap_single(card->pdev, buf_addr, skb->len,
867 * spider_net_kick_tx_dma - enables TX DMA processing
868 * @card: card structure
869 * @descr: descriptor address to enable TX processing at
871 * This routine will start the transmit DMA running if
872 * it is not already running. This routine ned only be
873 * called when queueing a new packet to an empty tx queue.
874 * Writes the current tx chain head as start address
875 * of the tx descriptor chain and enables the transmission
879 spider_net_kick_tx_dma(struct spider_net_card *card)
881 struct spider_net_descr *descr;
883 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
884 SPIDER_NET_TX_DMA_EN)
887 descr = card->tx_chain.tail;
889 if (spider_net_get_descr_status(descr->hwdescr) ==
890 SPIDER_NET_DESCR_CARDOWNED) {
891 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
893 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
894 SPIDER_NET_DMA_TX_VALUE);
897 if (descr == card->tx_chain.head)
903 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
907 * spider_net_xmit - transmits a frame over the device
908 * @skb: packet to send out
909 * @netdev: interface device structure
911 * returns 0 on success, !0 on failure
914 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
917 struct spider_net_card *card = netdev_priv(netdev);
919 spider_net_release_tx_chain(card, 0);
921 if (spider_net_prepare_tx_descr(card, skb) != 0) {
922 card->netdev_stats.tx_dropped++;
923 netif_stop_queue(netdev);
924 return NETDEV_TX_BUSY;
927 cnt = spider_net_set_low_watermark(card);
929 spider_net_kick_tx_dma(card);
934 * spider_net_cleanup_tx_ring - cleans up the TX ring
935 * @card: card structure
937 * spider_net_cleanup_tx_ring is called by either the tx_timer
938 * or from the NAPI polling routine.
939 * This routine releases resources associted with transmitted
940 * packets, including updating the queue tail pointer.
943 spider_net_cleanup_tx_ring(struct spider_net_card *card)
945 if ((spider_net_release_tx_chain(card, 0) != 0) &&
946 (card->netdev->flags & IFF_UP)) {
947 spider_net_kick_tx_dma(card);
948 netif_wake_queue(card->netdev);
953 * spider_net_do_ioctl - called for device ioctls
954 * @netdev: interface device structure
955 * @ifr: request parameter structure for ioctl
956 * @cmd: command code for ioctl
958 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
959 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
962 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
971 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
972 * @descr: descriptor to process
973 * @card: card structure
975 * Fills out skb structure and passes the data to the stack.
976 * The descriptor state is not changed.
979 spider_net_pass_skb_up(struct spider_net_descr *descr,
980 struct spider_net_card *card)
982 struct spider_net_hw_descr *hwdescr= descr->hwdescr;
984 struct net_device *netdev;
985 u32 data_status, data_error;
987 data_status = hwdescr->data_status;
988 data_error = hwdescr->data_error;
989 netdev = card->netdev;
992 skb_put(skb, hwdescr->valid_size);
994 /* the card seems to add 2 bytes of junk in front
995 * of the ethernet frame */
996 #define SPIDER_MISALIGN 2
997 skb_pull(skb, SPIDER_MISALIGN);
998 skb->protocol = eth_type_trans(skb, netdev);
1000 /* checksum offload */
1001 if (card->options.rx_csum) {
1002 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
1003 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
1004 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
1005 skb->ip_summed = CHECKSUM_UNNECESSARY;
1007 skb->ip_summed = CHECKSUM_NONE;
1009 skb->ip_summed = CHECKSUM_NONE;
1011 if (data_status & SPIDER_NET_VLAN_PACKET) {
1012 /* further enhancements: HW-accel VLAN
1013 * vlan_hwaccel_receive_skb
1017 /* update netdevice statistics */
1018 card->netdev_stats.rx_packets++;
1019 card->netdev_stats.rx_bytes += skb->len;
1021 /* pass skb up to stack */
1022 netif_receive_skb(skb);
1026 static void show_rx_chain(struct spider_net_card *card)
1028 struct spider_net_descr_chain *chain = &card->rx_chain;
1029 struct spider_net_descr *start= chain->tail;
1030 struct spider_net_descr *descr= start;
1034 int cstat = spider_net_get_descr_status(descr);
1035 printk(KERN_INFO "RX chain tail at descr=%ld\n",
1036 (start - card->descr) - card->tx_chain.num_desc);
1040 status = spider_net_get_descr_status(descr);
1041 if (cstat != status) {
1042 printk(KERN_INFO "Have %d descrs with stat=x%08x\n", cnt, cstat);
1047 descr = descr->next;
1048 } while (descr != start);
1049 printk(KERN_INFO "Last %d descrs with stat=x%08x\n", cnt, cstat);
1054 * spider_net_decode_one_descr - processes an RX descriptor
1055 * @card: card structure
1057 * Returns 1 if a packet has been sent to the stack, otherwise 0.
1059 * Processes an RX descriptor by iommu-unmapping the data buffer
1060 * and passing the packet up to the stack. This function is called
1061 * in softirq context, e.g. either bottom half from interrupt or
1062 * NAPI polling context.
1065 spider_net_decode_one_descr(struct spider_net_card *card)
1067 struct spider_net_descr_chain *chain = &card->rx_chain;
1068 struct spider_net_descr *descr = chain->tail;
1069 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
1072 status = spider_net_get_descr_status(hwdescr);
1074 /* Nothing in the descriptor, or ring must be empty */
1075 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1076 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1079 /* descriptor definitively used -- move on tail */
1080 chain->tail = descr->next;
1082 /* unmap descriptor */
1083 pci_unmap_single(card->pdev, hwdescr->buf_addr,
1084 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1086 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1087 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1088 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1089 if (netif_msg_rx_err(card))
1090 pr_err("%s: dropping RX descriptor with state %d\n",
1091 card->netdev->name, status);
1092 card->netdev_stats.rx_dropped++;
1096 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1097 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1098 if (netif_msg_rx_err(card))
1099 pr_err("%s: RX descriptor with unknown state %d\n",
1100 card->netdev->name, status);
1101 card->spider_stats.rx_desc_unk_state++;
1105 /* The cases we'll throw away the packet immediately */
1106 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
1107 if (netif_msg_rx_err(card))
1108 pr_err("%s: error in received descriptor found, "
1109 "data_status=x%08x, data_error=x%08x\n",
1111 hwdescr->data_status, hwdescr->data_error);
1115 if (hwdescr->dmac_cmd_status & 0xfefe) {
1116 pr_err("%s: bad status, cmd_status=x%08x\n",
1118 hwdescr->dmac_cmd_status);
1119 pr_err("buf_addr=x%08x\n", hwdescr->buf_addr);
1120 pr_err("buf_size=x%08x\n", hwdescr->buf_size);
1121 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
1122 pr_err("result_size=x%08x\n", hwdescr->result_size);
1123 pr_err("valid_size=x%08x\n", hwdescr->valid_size);
1124 pr_err("data_status=x%08x\n", hwdescr->data_status);
1125 pr_err("data_error=x%08x\n", hwdescr->data_error);
1126 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1128 card->spider_stats.rx_desc_error++;
1132 /* Ok, we've got a packet in descr */
1133 spider_net_pass_skb_up(descr, card);
1135 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1139 dev_kfree_skb_irq(descr->skb);
1141 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1146 * spider_net_poll - NAPI poll function called by the stack to return packets
1147 * @netdev: interface device structure
1148 * @budget: number of packets we can pass to the stack at most
1150 * returns 0 if no more packets available to the driver/stack. Returns 1,
1151 * if the quota is exceeded, but the driver has still packets.
1153 * spider_net_poll returns all packets from the rx descriptors to the stack
1154 * (using netif_receive_skb). If all/enough packets are up, the driver
1155 * reenables interrupts and returns 0. If not, 1 is returned.
1158 spider_net_poll(struct net_device *netdev, int *budget)
1160 struct spider_net_card *card = netdev_priv(netdev);
1161 int packets_to_do, packets_done = 0;
1162 int no_more_packets = 0;
1164 spider_net_cleanup_tx_ring(card);
1165 packets_to_do = min(*budget, netdev->quota);
1167 while (packets_to_do) {
1168 if (spider_net_decode_one_descr(card)) {
1172 /* no more packets for the stack */
1173 no_more_packets = 1;
1178 netdev->quota -= packets_done;
1179 *budget -= packets_done;
1180 spider_net_refill_rx_chain(card);
1181 spider_net_enable_rxdmac(card);
1183 /* if all packets are in the stack, enable interrupts and return 0 */
1184 /* if not, return 1 */
1185 if (no_more_packets) {
1186 netif_rx_complete(netdev);
1187 spider_net_rx_irq_on(card);
1195 * spider_net_get_stats - get interface statistics
1196 * @netdev: interface device structure
1198 * returns the interface statistics residing in the spider_net_card struct
1200 static struct net_device_stats *
1201 spider_net_get_stats(struct net_device *netdev)
1203 struct spider_net_card *card = netdev_priv(netdev);
1204 struct net_device_stats *stats = &card->netdev_stats;
1209 * spider_net_change_mtu - changes the MTU of an interface
1210 * @netdev: interface device structure
1211 * @new_mtu: new MTU value
1213 * returns 0 on success, <0 on failure
1216 spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1218 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1219 * and mtu is outbound only anyway */
1220 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1221 (new_mtu > SPIDER_NET_MAX_MTU) )
1223 netdev->mtu = new_mtu;
1228 * spider_net_set_mac - sets the MAC of an interface
1229 * @netdev: interface device structure
1230 * @ptr: pointer to new MAC address
1232 * Returns 0 on success, <0 on failure. Currently, we don't support this
1233 * and will always return EOPNOTSUPP.
1236 spider_net_set_mac(struct net_device *netdev, void *p)
1238 struct spider_net_card *card = netdev_priv(netdev);
1239 u32 macl, macu, regvalue;
1240 struct sockaddr *addr = p;
1242 if (!is_valid_ether_addr(addr->sa_data))
1243 return -EADDRNOTAVAIL;
1245 /* switch off GMACTPE and GMACRPE */
1246 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1247 regvalue &= ~((1 << 5) | (1 << 6));
1248 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1251 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1252 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1253 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1254 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1255 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1257 /* switch GMACTPE and GMACRPE back on */
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);
1262 spider_net_set_promisc(card);
1264 /* look up, whether we have been successful */
1265 if (spider_net_get_mac_address(netdev))
1266 return -EADDRNOTAVAIL;
1267 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1268 return -EADDRNOTAVAIL;
1274 * spider_net_link_reset
1275 * @netdev: net device structure
1277 * This is called when the PHY_LINK signal is asserted. For the blade this is
1278 * not connected so we should never get here.
1282 spider_net_link_reset(struct net_device *netdev)
1285 struct spider_net_card *card = netdev_priv(netdev);
1287 del_timer_sync(&card->aneg_timer);
1289 /* clear interrupt, block further interrupts */
1290 spider_net_write_reg(card, SPIDER_NET_GMACST,
1291 spider_net_read_reg(card, SPIDER_NET_GMACST));
1292 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1294 /* reset phy and setup aneg */
1295 spider_net_setup_aneg(card);
1296 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1301 * spider_net_handle_error_irq - handles errors raised by an interrupt
1302 * @card: card structure
1303 * @status_reg: interrupt status register 0 (GHIINT0STS)
1305 * spider_net_handle_error_irq treats or ignores all error conditions
1306 * found when an interrupt is presented
1309 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1311 u32 error_reg1, error_reg2;
1315 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1316 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1318 /* check GHIINT0STS ************************************/
1320 for (i = 0; i < 32; i++)
1321 if (status_reg & (1<<i))
1324 /* let error_reg1 and error_reg2 evaluation decide, what to do
1325 case SPIDER_NET_PHYINT:
1326 case SPIDER_NET_GMAC2INT:
1327 case SPIDER_NET_GMAC1INT:
1328 case SPIDER_NET_GFIFOINT:
1329 case SPIDER_NET_DMACINT:
1330 case SPIDER_NET_GSYSINT:
1333 case SPIDER_NET_GIPSINT:
1337 case SPIDER_NET_GPWOPCMPINT:
1338 /* PHY write operation completed */
1341 case SPIDER_NET_GPROPCMPINT:
1342 /* PHY read operation completed */
1343 /* we don't use semaphores, as we poll for the completion
1344 * of the read operation in spider_net_read_phy. Should take
1348 case SPIDER_NET_GPWFFINT:
1349 /* PHY command queue full */
1350 if (netif_msg_intr(card))
1351 pr_err("PHY write queue full\n");
1355 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1356 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1357 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1359 case SPIDER_NET_GDTDEN0INT:
1360 /* someone has set TX_DMA_EN to 0 */
1364 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1365 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1366 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1367 case SPIDER_NET_GDADEN0INT:
1368 /* someone has set RX_DMA_EN to 0 */
1373 case SPIDER_NET_GDDFDCINT:
1374 case SPIDER_NET_GDCFDCINT:
1375 case SPIDER_NET_GDBFDCINT:
1376 case SPIDER_NET_GDAFDCINT:
1377 /* case SPIDER_NET_GDNMINT: not used. print a message */
1378 /* case SPIDER_NET_GCNMINT: not used. print a message */
1379 /* case SPIDER_NET_GBNMINT: not used. print a message */
1380 /* case SPIDER_NET_GANMINT: not used. print a message */
1381 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1386 case SPIDER_NET_GDTFDCINT:
1389 case SPIDER_NET_GTTEDINT:
1392 case SPIDER_NET_GDTDCEINT:
1393 /* chain end. If a descriptor should be sent, kick off
1395 if (card->tx_chain.tail != card->tx_chain.head)
1396 spider_net_kick_tx_dma(card);
1401 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1402 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1405 /* check GHIINT1STS ************************************/
1407 for (i = 0; i < 32; i++)
1408 if (error_reg1 & (1<<i))
1411 case SPIDER_NET_GTMFLLINT:
1412 /* TX RAM full may happen on a usual case.
1413 * Logging is not needed. */
1416 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1417 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1418 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1419 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1420 case SPIDER_NET_GRMFLLINT:
1421 if (netif_msg_intr(card) && net_ratelimit())
1422 pr_err("Spider RX RAM full, incoming packets "
1423 "might be discarded!\n");
1424 spider_net_rx_irq_off(card);
1425 netif_rx_schedule(card->netdev);
1429 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1430 case SPIDER_NET_GDTINVDINT:
1431 /* allrighty. tx from previous descr ok */
1436 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1437 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1438 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1439 case SPIDER_NET_GDADCEINT:
1440 if (netif_msg_intr(card) && net_ratelimit())
1441 pr_err("got descriptor chain end interrupt, "
1442 "restarting DMAC %c.\n",
1443 'D'-(i-SPIDER_NET_GDDDCEINT)/3);
1444 spider_net_refill_rx_chain(card);
1445 spider_net_enable_rxdmac(card);
1449 /* invalid descriptor */
1450 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1451 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1452 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1453 case SPIDER_NET_GDAINVDINT:
1454 /* could happen when rx chain is full */
1455 spider_net_refill_rx_chain(card);
1456 spider_net_enable_rxdmac(card);
1460 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1461 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1462 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1463 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1464 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1465 /* case SPIDER_NET_GDSERINT: problem, print a message */
1466 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1467 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1468 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1469 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1470 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1476 /* check GHIINT2STS ************************************/
1478 for (i = 0; i < 32; i++)
1479 if (error_reg2 & (1<<i))
1482 /* there is nothing we can (want to) do at this time. Log a
1483 * message, we can switch on and off the specific values later on
1484 case SPIDER_NET_GPROPERINT:
1485 case SPIDER_NET_GMCTCRSNGINT:
1486 case SPIDER_NET_GMCTLCOLINT:
1487 case SPIDER_NET_GMCTTMOTINT:
1488 case SPIDER_NET_GMCRCAERINT:
1489 case SPIDER_NET_GMCRCALERINT:
1490 case SPIDER_NET_GMCRALNERINT:
1491 case SPIDER_NET_GMCROVRINT:
1492 case SPIDER_NET_GMCRRNTINT:
1493 case SPIDER_NET_GMCRRXERINT:
1494 case SPIDER_NET_GTITCSERINT:
1495 case SPIDER_NET_GTIFMTERINT:
1496 case SPIDER_NET_GTIPKTRVKINT:
1497 case SPIDER_NET_GTISPINGINT:
1498 case SPIDER_NET_GTISADNGINT:
1499 case SPIDER_NET_GTISPDNGINT:
1500 case SPIDER_NET_GRIFMTERINT:
1501 case SPIDER_NET_GRIPKTRVKINT:
1502 case SPIDER_NET_GRISPINGINT:
1503 case SPIDER_NET_GRISADNGINT:
1504 case SPIDER_NET_GRISPDNGINT:
1511 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
1512 pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, "
1513 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1515 status_reg, error_reg1, error_reg2);
1517 /* clear interrupt sources */
1518 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1519 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1523 * spider_net_interrupt - interrupt handler for spider_net
1524 * @irq: interupt number
1525 * @ptr: pointer to net_device
1526 * @regs: PU registers
1528 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1529 * interrupt found raised by card.
1531 * This is the interrupt handler, that turns off
1532 * interrupts for this device and makes the stack poll the driver
1535 spider_net_interrupt(int irq, void *ptr)
1537 struct net_device *netdev = ptr;
1538 struct spider_net_card *card = netdev_priv(netdev);
1541 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1546 if (status_reg & SPIDER_NET_RXINT ) {
1547 spider_net_rx_irq_off(card);
1548 netif_rx_schedule(netdev);
1550 if (status_reg & SPIDER_NET_TXINT)
1551 netif_rx_schedule(netdev);
1553 if (status_reg & SPIDER_NET_LINKINT)
1554 spider_net_link_reset(netdev);
1556 if (status_reg & SPIDER_NET_ERRINT )
1557 spider_net_handle_error_irq(card, status_reg);
1559 /* clear interrupt sources */
1560 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1565 #ifdef CONFIG_NET_POLL_CONTROLLER
1567 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1568 * @netdev: interface device structure
1570 * see Documentation/networking/netconsole.txt
1573 spider_net_poll_controller(struct net_device *netdev)
1575 disable_irq(netdev->irq);
1576 spider_net_interrupt(netdev->irq, netdev);
1577 enable_irq(netdev->irq);
1579 #endif /* CONFIG_NET_POLL_CONTROLLER */
1582 * spider_net_init_card - initializes the card
1583 * @card: card structure
1585 * spider_net_init_card initializes the card so that other registers can
1589 spider_net_init_card(struct spider_net_card *card)
1591 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1592 SPIDER_NET_CKRCTRL_STOP_VALUE);
1594 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1595 SPIDER_NET_CKRCTRL_RUN_VALUE);
1597 /* trigger ETOMOD signal */
1598 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1599 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1604 * spider_net_enable_card - enables the card by setting all kinds of regs
1605 * @card: card structure
1607 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1610 spider_net_enable_card(struct spider_net_card *card)
1613 /* the following array consists of (register),(value) pairs
1614 * that are set in this function. A register of 0 ends the list */
1616 { SPIDER_NET_GRESUMINTNUM, 0 },
1617 { SPIDER_NET_GREINTNUM, 0 },
1619 /* set interrupt frame number registers */
1620 /* clear the single DMA engine registers first */
1621 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1622 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1623 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1624 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1625 /* then set, what we really need */
1626 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1628 /* timer counter registers and stuff */
1629 { SPIDER_NET_GFREECNNUM, 0 },
1630 { SPIDER_NET_GONETIMENUM, 0 },
1631 { SPIDER_NET_GTOUTFRMNUM, 0 },
1633 /* RX mode setting */
1634 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1635 /* TX mode setting */
1636 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1637 /* IPSEC mode setting */
1638 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1640 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1642 { SPIDER_NET_GMRWOLCTRL, 0 },
1643 { SPIDER_NET_GTESTMD, 0x10000000 },
1644 { SPIDER_NET_GTTQMSK, 0x00400040 },
1646 { SPIDER_NET_GMACINTEN, 0 },
1648 /* flow control stuff */
1649 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1650 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1652 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1657 while (regs[i][0]) {
1658 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1662 /* clear unicast filter table entries 1 to 14 */
1663 for (i = 1; i <= 14; i++) {
1664 spider_net_write_reg(card,
1665 SPIDER_NET_GMRUAFILnR + i * 8,
1667 spider_net_write_reg(card,
1668 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1672 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1674 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1676 /* set chain tail adress for RX chains and
1678 spider_net_enable_rxchtails(card);
1679 spider_net_enable_rxdmac(card);
1681 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1683 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1684 SPIDER_NET_LENLMT_VALUE);
1685 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1686 SPIDER_NET_OPMODE_VALUE);
1688 /* set interrupt mask registers */
1689 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1690 SPIDER_NET_INT0_MASK_VALUE);
1691 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1692 SPIDER_NET_INT1_MASK_VALUE);
1693 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1694 SPIDER_NET_INT2_MASK_VALUE);
1696 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1697 SPIDER_NET_GDTBSTA);
1701 * spider_net_download_firmware - loads firmware into the adapter
1702 * @card: card structure
1703 * @firmware_ptr: pointer to firmware data
1705 * spider_net_download_firmware loads the firmware data into the
1706 * adapter. It assumes the length etc. to be allright.
1709 spider_net_download_firmware(struct spider_net_card *card,
1710 const void *firmware_ptr)
1713 const u32 *fw_ptr = firmware_ptr;
1715 /* stop sequencers */
1716 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1717 SPIDER_NET_STOP_SEQ_VALUE);
1719 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1721 spider_net_write_reg(card,
1722 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1723 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1724 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1725 sequencer * 8, *fw_ptr);
1730 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1733 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1734 SPIDER_NET_RUN_SEQ_VALUE);
1740 * spider_net_init_firmware - reads in firmware parts
1741 * @card: card structure
1743 * Returns 0 on success, <0 on failure
1745 * spider_net_init_firmware opens the sequencer firmware and does some basic
1746 * checks. This function opens and releases the firmware structure. A call
1747 * to download the firmware is performed before the release.
1751 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1752 * the program for each sequencer. Use the command
1753 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1754 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1755 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1757 * to generate spider_fw.bin, if you have sequencer programs with something
1758 * like the following contents for each sequencer:
1759 * <ONE LINE COMMENT>
1760 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1761 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1763 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1766 spider_net_init_firmware(struct spider_net_card *card)
1768 struct firmware *firmware = NULL;
1769 struct device_node *dn;
1770 const u8 *fw_prop = NULL;
1774 if (request_firmware((const struct firmware **)&firmware,
1775 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1776 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1777 netif_msg_probe(card) ) {
1778 pr_err("Incorrect size of spidernet firmware in " \
1779 "filesystem. Looking in host firmware...\n");
1782 err = spider_net_download_firmware(card, firmware->data);
1784 release_firmware(firmware);
1792 dn = pci_device_to_OF_node(card->pdev);
1796 fw_prop = of_get_property(dn, "firmware", &fw_size);
1800 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1801 netif_msg_probe(card) ) {
1802 pr_err("Incorrect size of spidernet firmware in " \
1807 err = spider_net_download_firmware(card, fw_prop);
1812 if (netif_msg_probe(card))
1813 pr_err("Couldn't find spidernet firmware in filesystem " \
1814 "or host firmware\n");
1819 * spider_net_open - called upon ifonfig up
1820 * @netdev: interface device structure
1822 * returns 0 on success, <0 on failure
1824 * spider_net_open allocates all the descriptors and memory needed for
1825 * operation, sets up multicast list and enables interrupts
1828 spider_net_open(struct net_device *netdev)
1830 struct spider_net_card *card = netdev_priv(netdev);
1833 result = spider_net_init_firmware(card);
1835 goto init_firmware_failed;
1837 /* start probing with copper */
1838 spider_net_setup_aneg(card);
1839 if (card->phy.def->phy_id)
1840 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1842 result = spider_net_init_chain(card, &card->tx_chain);
1844 goto alloc_tx_failed;
1845 card->low_watermark = NULL;
1847 result = spider_net_init_chain(card, &card->rx_chain);
1849 goto alloc_rx_failed;
1851 /* Allocate rx skbs */
1852 if (spider_net_alloc_rx_skbs(card))
1853 goto alloc_skbs_failed;
1855 spider_net_set_multi(netdev);
1857 /* further enhancement: setup hw vlan, if needed */
1860 if (request_irq(netdev->irq, spider_net_interrupt,
1861 IRQF_SHARED, netdev->name, netdev))
1862 goto register_int_failed;
1864 spider_net_enable_card(card);
1866 netif_start_queue(netdev);
1867 netif_carrier_on(netdev);
1868 netif_poll_enable(netdev);
1872 register_int_failed:
1873 spider_net_free_rx_chain_contents(card);
1875 spider_net_free_chain(card, &card->rx_chain);
1877 spider_net_free_chain(card, &card->tx_chain);
1879 del_timer_sync(&card->aneg_timer);
1880 init_firmware_failed:
1885 * spider_net_link_phy
1886 * @data: used for pointer to card structure
1889 static void spider_net_link_phy(unsigned long data)
1891 struct spider_net_card *card = (struct spider_net_card *)data;
1892 struct mii_phy *phy = &card->phy;
1894 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
1895 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
1897 pr_info("%s: link is down trying to bring it up\n", card->netdev->name);
1899 switch (card->medium) {
1900 case BCM54XX_COPPER:
1901 /* enable fiber with autonegotiation first */
1902 if (phy->def->ops->enable_fiber)
1903 phy->def->ops->enable_fiber(phy, 1);
1904 card->medium = BCM54XX_FIBER;
1908 /* fiber didn't come up, try to disable fiber autoneg */
1909 if (phy->def->ops->enable_fiber)
1910 phy->def->ops->enable_fiber(phy, 0);
1911 card->medium = BCM54XX_UNKNOWN;
1914 case BCM54XX_UNKNOWN:
1915 /* copper, fiber with and without failed,
1916 * retry from beginning */
1917 spider_net_setup_aneg(card);
1918 card->medium = BCM54XX_COPPER;
1922 card->aneg_count = 0;
1923 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1927 /* link still not up, try again later */
1928 if (!(phy->def->ops->poll_link(phy))) {
1930 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1934 /* link came up, get abilities */
1935 phy->def->ops->read_link(phy);
1937 spider_net_write_reg(card, SPIDER_NET_GMACST,
1938 spider_net_read_reg(card, SPIDER_NET_GMACST));
1939 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
1941 if (phy->speed == 1000)
1942 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
1944 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
1946 card->aneg_count = 0;
1948 pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n",
1949 phy->def->name, phy->speed, phy->duplex==1 ? "Full" : "Half",
1950 phy->autoneg==1 ? "" : "no ");
1956 * spider_net_setup_phy - setup PHY
1957 * @card: card structure
1959 * returns 0 on success, <0 on failure
1961 * spider_net_setup_phy is used as part of spider_net_probe.
1964 spider_net_setup_phy(struct spider_net_card *card)
1966 struct mii_phy *phy = &card->phy;
1968 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1969 SPIDER_NET_DMASEL_VALUE);
1970 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1971 SPIDER_NET_PHY_CTRL_VALUE);
1973 phy->dev = card->netdev;
1974 phy->mdio_read = spider_net_read_phy;
1975 phy->mdio_write = spider_net_write_phy;
1977 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
1979 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
1980 if (id != 0x0000 && id != 0xffff) {
1981 if (!mii_phy_probe(phy, phy->mii_id)) {
1982 pr_info("Found %s.\n", phy->def->name);
1992 * spider_net_workaround_rxramfull - work around firmware bug
1993 * @card: card structure
1998 spider_net_workaround_rxramfull(struct spider_net_card *card)
2000 int i, sequencer = 0;
2003 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2004 SPIDER_NET_CKRCTRL_RUN_VALUE);
2006 /* empty sequencer data */
2007 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2009 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
2010 sequencer * 8, 0x0);
2011 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
2012 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2013 sequencer * 8, 0x0);
2017 /* set sequencer operation */
2018 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2021 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2022 SPIDER_NET_CKRCTRL_STOP_VALUE);
2026 * spider_net_stop - called upon ifconfig down
2027 * @netdev: interface device structure
2032 spider_net_stop(struct net_device *netdev)
2034 struct spider_net_card *card = netdev_priv(netdev);
2036 netif_poll_disable(netdev);
2037 netif_carrier_off(netdev);
2038 netif_stop_queue(netdev);
2039 del_timer_sync(&card->tx_timer);
2040 del_timer_sync(&card->aneg_timer);
2042 /* disable/mask all interrupts */
2043 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
2044 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
2045 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
2046 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
2048 free_irq(netdev->irq, netdev);
2050 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2051 SPIDER_NET_DMA_TX_FEND_VALUE);
2053 /* turn off DMA, force end */
2054 spider_net_disable_rxdmac(card);
2056 /* release chains */
2057 spider_net_release_tx_chain(card, 1);
2058 spider_net_free_rx_chain_contents(card);
2060 spider_net_free_chain(card, &card->tx_chain);
2061 spider_net_free_chain(card, &card->rx_chain);
2067 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2068 * function (to be called not under interrupt status)
2069 * @data: data, is interface device structure
2071 * called as task when tx hangs, resets interface (if interface is up)
2074 spider_net_tx_timeout_task(struct work_struct *work)
2076 struct spider_net_card *card =
2077 container_of(work, struct spider_net_card, tx_timeout_task);
2078 struct net_device *netdev = card->netdev;
2080 if (!(netdev->flags & IFF_UP))
2083 netif_device_detach(netdev);
2084 spider_net_stop(netdev);
2086 spider_net_workaround_rxramfull(card);
2087 spider_net_init_card(card);
2089 if (spider_net_setup_phy(card))
2092 spider_net_open(netdev);
2093 spider_net_kick_tx_dma(card);
2094 netif_device_attach(netdev);
2097 atomic_dec(&card->tx_timeout_task_counter);
2101 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2102 * @netdev: interface device structure
2104 * called, if tx hangs. Schedules a task that resets the interface
2107 spider_net_tx_timeout(struct net_device *netdev)
2109 struct spider_net_card *card;
2111 card = netdev_priv(netdev);
2112 atomic_inc(&card->tx_timeout_task_counter);
2113 if (netdev->flags & IFF_UP)
2114 schedule_work(&card->tx_timeout_task);
2116 atomic_dec(&card->tx_timeout_task_counter);
2117 card->spider_stats.tx_timeouts++;
2121 * spider_net_setup_netdev_ops - initialization of net_device operations
2122 * @netdev: net_device structure
2124 * fills out function pointers in the net_device structure
2127 spider_net_setup_netdev_ops(struct net_device *netdev)
2129 netdev->open = &spider_net_open;
2130 netdev->stop = &spider_net_stop;
2131 netdev->hard_start_xmit = &spider_net_xmit;
2132 netdev->get_stats = &spider_net_get_stats;
2133 netdev->set_multicast_list = &spider_net_set_multi;
2134 netdev->set_mac_address = &spider_net_set_mac;
2135 netdev->change_mtu = &spider_net_change_mtu;
2136 netdev->do_ioctl = &spider_net_do_ioctl;
2138 netdev->tx_timeout = &spider_net_tx_timeout;
2139 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2141 netdev->poll = &spider_net_poll;
2142 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
2144 #ifdef CONFIG_NET_POLL_CONTROLLER
2145 /* poll controller */
2146 netdev->poll_controller = &spider_net_poll_controller;
2147 #endif /* CONFIG_NET_POLL_CONTROLLER */
2149 netdev->ethtool_ops = &spider_net_ethtool_ops;
2153 * spider_net_setup_netdev - initialization of net_device
2154 * @card: card structure
2156 * Returns 0 on success or <0 on failure
2158 * spider_net_setup_netdev initializes the net_device structure
2161 spider_net_setup_netdev(struct spider_net_card *card)
2164 struct net_device *netdev = card->netdev;
2165 struct device_node *dn;
2166 struct sockaddr addr;
2169 SET_MODULE_OWNER(netdev);
2170 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2172 pci_set_drvdata(card->pdev, netdev);
2174 init_timer(&card->tx_timer);
2175 card->tx_timer.function =
2176 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2177 card->tx_timer.data = (unsigned long) card;
2178 netdev->irq = card->pdev->irq;
2180 card->aneg_count = 0;
2181 init_timer(&card->aneg_timer);
2182 card->aneg_timer.function = spider_net_link_phy;
2183 card->aneg_timer.data = (unsigned long) card;
2185 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2187 spider_net_setup_netdev_ops(netdev);
2189 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
2190 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2191 * NETIF_F_HW_VLAN_FILTER */
2193 netdev->irq = card->pdev->irq;
2195 dn = pci_device_to_OF_node(card->pdev);
2199 mac = of_get_property(dn, "local-mac-address", NULL);
2202 memcpy(addr.sa_data, mac, ETH_ALEN);
2204 result = spider_net_set_mac(netdev, &addr);
2205 if ((result) && (netif_msg_probe(card)))
2206 pr_err("Failed to set MAC address: %i\n", result);
2208 result = register_netdev(netdev);
2210 if (netif_msg_probe(card))
2211 pr_err("Couldn't register net_device: %i\n",
2216 if (netif_msg_probe(card))
2217 pr_info("Initialized device %s.\n", netdev->name);
2223 * spider_net_alloc_card - allocates net_device and card structure
2225 * returns the card structure or NULL in case of errors
2227 * the card and net_device structures are linked to each other
2229 static struct spider_net_card *
2230 spider_net_alloc_card(void)
2232 struct net_device *netdev;
2233 struct spider_net_card *card;
2236 alloc_size = sizeof(struct spider_net_card) +
2237 (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr);
2238 netdev = alloc_etherdev(alloc_size);
2242 card = netdev_priv(netdev);
2243 card->netdev = netdev;
2244 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2245 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
2246 init_waitqueue_head(&card->waitq);
2247 atomic_set(&card->tx_timeout_task_counter, 0);
2249 card->rx_chain.num_desc = rx_descriptors;
2250 card->rx_chain.ring = card->darray;
2251 card->tx_chain.num_desc = tx_descriptors;
2252 card->tx_chain.ring = card->darray + rx_descriptors;
2258 * spider_net_undo_pci_setup - releases PCI ressources
2259 * @card: card structure
2261 * spider_net_undo_pci_setup releases the mapped regions
2264 spider_net_undo_pci_setup(struct spider_net_card *card)
2266 iounmap(card->regs);
2267 pci_release_regions(card->pdev);
2271 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2272 * @card: card structure
2275 * Returns the card structure or NULL if any errors occur
2277 * spider_net_setup_pci_dev initializes pdev and together with the
2278 * functions called in spider_net_open configures the device so that
2279 * data can be transferred over it
2280 * The net_device structure is attached to the card structure, if the
2281 * function returns without error.
2283 static struct spider_net_card *
2284 spider_net_setup_pci_dev(struct pci_dev *pdev)
2286 struct spider_net_card *card;
2287 unsigned long mmio_start, mmio_len;
2289 if (pci_enable_device(pdev)) {
2290 pr_err("Couldn't enable PCI device\n");
2294 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2295 pr_err("Couldn't find proper PCI device base address.\n");
2296 goto out_disable_dev;
2299 if (pci_request_regions(pdev, spider_net_driver_name)) {
2300 pr_err("Couldn't obtain PCI resources, aborting.\n");
2301 goto out_disable_dev;
2304 pci_set_master(pdev);
2306 card = spider_net_alloc_card();
2308 pr_err("Couldn't allocate net_device structure, "
2310 goto out_release_regions;
2314 /* fetch base address and length of first resource */
2315 mmio_start = pci_resource_start(pdev, 0);
2316 mmio_len = pci_resource_len(pdev, 0);
2318 card->netdev->mem_start = mmio_start;
2319 card->netdev->mem_end = mmio_start + mmio_len;
2320 card->regs = ioremap(mmio_start, mmio_len);
2323 pr_err("Couldn't obtain PCI resources, aborting.\n");
2324 goto out_release_regions;
2329 out_release_regions:
2330 pci_release_regions(pdev);
2332 pci_disable_device(pdev);
2333 pci_set_drvdata(pdev, NULL);
2338 * spider_net_probe - initialization of a device
2340 * @ent: entry in the device id list
2342 * Returns 0 on success, <0 on failure
2344 * spider_net_probe initializes pdev and registers a net_device
2345 * structure for it. After that, the device can be ifconfig'ed up
2347 static int __devinit
2348 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2351 struct spider_net_card *card;
2353 card = spider_net_setup_pci_dev(pdev);
2357 spider_net_workaround_rxramfull(card);
2358 spider_net_init_card(card);
2360 err = spider_net_setup_phy(card);
2364 err = spider_net_setup_netdev(card);
2371 spider_net_undo_pci_setup(card);
2372 free_netdev(card->netdev);
2378 * spider_net_remove - removal of a device
2381 * Returns 0 on success, <0 on failure
2383 * spider_net_remove is called to remove the device and unregisters the
2386 static void __devexit
2387 spider_net_remove(struct pci_dev *pdev)
2389 struct net_device *netdev;
2390 struct spider_net_card *card;
2392 netdev = pci_get_drvdata(pdev);
2393 card = netdev_priv(netdev);
2395 wait_event(card->waitq,
2396 atomic_read(&card->tx_timeout_task_counter) == 0);
2398 unregister_netdev(netdev);
2400 /* switch off card */
2401 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2402 SPIDER_NET_CKRCTRL_STOP_VALUE);
2403 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2404 SPIDER_NET_CKRCTRL_RUN_VALUE);
2406 spider_net_undo_pci_setup(card);
2407 free_netdev(netdev);
2410 static struct pci_driver spider_net_driver = {
2411 .name = spider_net_driver_name,
2412 .id_table = spider_net_pci_tbl,
2413 .probe = spider_net_probe,
2414 .remove = __devexit_p(spider_net_remove)
2418 * spider_net_init - init function when the driver is loaded
2420 * spider_net_init registers the device driver
2422 static int __init spider_net_init(void)
2424 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2426 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2427 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2428 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2430 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2431 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2432 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2434 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2435 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2436 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2438 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2439 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2440 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2443 return pci_register_driver(&spider_net_driver);
2447 * spider_net_cleanup - exit function when driver is unloaded
2449 * spider_net_cleanup unregisters the device driver
2451 static void __exit spider_net_cleanup(void)
2453 pci_unregister_driver(&spider_net_driver);
2456 module_init(spider_net_init);
2457 module_exit(spider_net_cleanup);