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/interrupt.h>
35 #include <linux/gfp.h>
36 #include <linux/ioport.h>
38 #include <linux/kernel.h>
39 #include <linux/mii.h>
40 #include <linux/module.h>
41 #include <linux/netdevice.h>
42 #include <linux/device.h>
43 #include <linux/pci.h>
44 #include <linux/skbuff.h>
45 #include <linux/tcp.h>
46 #include <linux/types.h>
47 #include <linux/vmalloc.h>
48 #include <linux/wait.h>
49 #include <linux/workqueue.h>
50 #include <linux/bitops.h>
51 #include <asm/pci-bridge.h>
52 #include <net/checksum.h>
54 #include "spider_net.h"
56 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
57 "<Jens.Osterkamp@de.ibm.com>");
58 MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
59 MODULE_LICENSE("GPL");
60 MODULE_VERSION(VERSION);
61 MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME);
63 static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
64 static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
66 module_param(rx_descriptors, int, 0444);
67 module_param(tx_descriptors, int, 0444);
69 MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
71 MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
74 char spider_net_driver_name[] = "spidernet";
76 static DEFINE_PCI_DEVICE_TABLE(spider_net_pci_tbl) = {
77 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
78 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
82 MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
85 * spider_net_read_reg - reads an SMMIO register of a card
86 * @card: device structure
87 * @reg: register to read from
89 * returns the content of the specified SMMIO register.
92 spider_net_read_reg(struct spider_net_card *card, u32 reg)
94 /* We use the powerpc specific variants instead of readl_be() because
95 * we know spidernet is not a real PCI device and we can thus avoid the
96 * performance hit caused by the PCI workarounds.
98 return in_be32(card->regs + reg);
102 * spider_net_write_reg - writes to an SMMIO register of a card
103 * @card: device structure
104 * @reg: register to write to
105 * @value: value to write into the specified SMMIO register
108 spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
110 /* We use the powerpc specific variants instead of writel_be() because
111 * we know spidernet is not a real PCI device and we can thus avoid the
112 * performance hit caused by the PCI workarounds.
114 out_be32(card->regs + reg, value);
118 * spider_net_write_phy - write to phy register
119 * @netdev: adapter to be written to
122 * @val: value to be written to phy register
124 * spider_net_write_phy_register writes to an arbitrary PHY
125 * register via the spider GPCWOPCMD register. We assume the queue does
126 * not run full (not more than 15 commands outstanding).
129 spider_net_write_phy(struct net_device *netdev, int mii_id,
132 struct spider_net_card *card = netdev_priv(netdev);
135 writevalue = ((u32)mii_id << 21) |
136 ((u32)reg << 16) | ((u32)val);
138 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
142 * spider_net_read_phy - read from phy register
143 * @netdev: network device to be read from
147 * Returns value read from PHY register
149 * spider_net_write_phy reads from an arbitrary PHY
150 * register via the spider GPCROPCMD register
153 spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
155 struct spider_net_card *card = netdev_priv(netdev);
158 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
159 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
161 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
162 * interrupt, as we poll for the completion of the read operation
163 * in spider_net_read_phy. Should take about 50 us */
165 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
166 } while (readvalue & SPIDER_NET_GPREXEC);
168 readvalue &= SPIDER_NET_GPRDAT_MASK;
174 * spider_net_setup_aneg - initial auto-negotiation setup
175 * @card: device structure
178 spider_net_setup_aneg(struct spider_net_card *card)
180 struct mii_phy *phy = &card->phy;
184 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
185 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
187 if (bmsr & BMSR_10HALF)
188 advertise |= ADVERTISED_10baseT_Half;
189 if (bmsr & BMSR_10FULL)
190 advertise |= ADVERTISED_10baseT_Full;
191 if (bmsr & BMSR_100HALF)
192 advertise |= ADVERTISED_100baseT_Half;
193 if (bmsr & BMSR_100FULL)
194 advertise |= ADVERTISED_100baseT_Full;
196 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
197 advertise |= SUPPORTED_1000baseT_Full;
198 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
199 advertise |= SUPPORTED_1000baseT_Half;
201 sungem_phy_probe(phy, phy->mii_id);
202 phy->def->ops->setup_aneg(phy, advertise);
207 * spider_net_rx_irq_off - switch off rx irq on this spider card
208 * @card: device structure
210 * switches off rx irq by masking them out in the GHIINTnMSK register
213 spider_net_rx_irq_off(struct spider_net_card *card)
217 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
218 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
222 * spider_net_rx_irq_on - switch on rx irq on this spider card
223 * @card: device structure
225 * switches on rx irq by enabling them in the GHIINTnMSK register
228 spider_net_rx_irq_on(struct spider_net_card *card)
232 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
233 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
237 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
238 * @card: card structure
240 * spider_net_set_promisc sets the unicast destination address filter and
241 * thus either allows for non-promisc mode or promisc mode
244 spider_net_set_promisc(struct spider_net_card *card)
247 struct net_device *netdev = card->netdev;
249 if (netdev->flags & IFF_PROMISC) {
250 /* clear destination entry 0 */
251 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
252 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
253 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
254 SPIDER_NET_PROMISC_VALUE);
256 macu = netdev->dev_addr[0];
258 macu |= netdev->dev_addr[1];
259 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
261 macu |= SPIDER_NET_UA_DESCR_VALUE;
262 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
263 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
264 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
265 SPIDER_NET_NONPROMISC_VALUE);
270 * spider_net_get_mac_address - read mac address from spider card
271 * @card: device structure
273 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
276 spider_net_get_mac_address(struct net_device *netdev)
278 struct spider_net_card *card = netdev_priv(netdev);
281 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
282 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
284 netdev->dev_addr[0] = (macu >> 24) & 0xff;
285 netdev->dev_addr[1] = (macu >> 16) & 0xff;
286 netdev->dev_addr[2] = (macu >> 8) & 0xff;
287 netdev->dev_addr[3] = macu & 0xff;
288 netdev->dev_addr[4] = (macl >> 8) & 0xff;
289 netdev->dev_addr[5] = macl & 0xff;
291 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
298 * spider_net_get_descr_status -- returns the status of a descriptor
299 * @descr: descriptor to look at
301 * returns the status as in the dmac_cmd_status field of the descriptor
304 spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
306 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
310 * spider_net_free_chain - free descriptor chain
311 * @card: card structure
312 * @chain: address of chain
316 spider_net_free_chain(struct spider_net_card *card,
317 struct spider_net_descr_chain *chain)
319 struct spider_net_descr *descr;
324 descr->hwdescr->next_descr_addr = 0;
326 } while (descr != chain->ring);
328 dma_free_coherent(&card->pdev->dev, chain->num_desc,
329 chain->hwring, chain->dma_addr);
333 * spider_net_init_chain - alloc and link descriptor chain
334 * @card: card structure
335 * @chain: address of chain
337 * We manage a circular list that mirrors the hardware structure,
338 * except that the hardware uses bus addresses.
340 * Returns 0 on success, <0 on failure
343 spider_net_init_chain(struct spider_net_card *card,
344 struct spider_net_descr_chain *chain)
347 struct spider_net_descr *descr;
348 struct spider_net_hw_descr *hwdescr;
352 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
354 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
355 &chain->dma_addr, GFP_KERNEL);
360 memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr));
362 /* Set up the hardware pointers in each descriptor */
364 hwdescr = chain->hwring;
365 buf = chain->dma_addr;
366 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
367 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
368 hwdescr->next_descr_addr = 0;
370 descr->hwdescr = hwdescr;
371 descr->bus_addr = buf;
372 descr->next = descr + 1;
373 descr->prev = descr - 1;
375 buf += sizeof(struct spider_net_hw_descr);
377 /* do actual circular list */
378 (descr-1)->next = chain->ring;
379 chain->ring->prev = descr-1;
381 spin_lock_init(&chain->lock);
382 chain->head = chain->ring;
383 chain->tail = chain->ring;
388 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
389 * @card: card structure
391 * returns 0 on success, <0 on failure
394 spider_net_free_rx_chain_contents(struct spider_net_card *card)
396 struct spider_net_descr *descr;
398 descr = card->rx_chain.head;
401 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
402 SPIDER_NET_MAX_FRAME,
403 PCI_DMA_BIDIRECTIONAL);
404 dev_kfree_skb(descr->skb);
408 } while (descr != card->rx_chain.head);
412 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
413 * @card: card structure
414 * @descr: descriptor to re-init
416 * Return 0 on success, <0 on failure.
418 * Allocates a new rx skb, iommu-maps it and attaches it to the
419 * descriptor. Mark the descriptor as activated, ready-to-use.
422 spider_net_prepare_rx_descr(struct spider_net_card *card,
423 struct spider_net_descr *descr)
425 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
430 /* we need to round up the buffer size to a multiple of 128 */
431 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
432 (~(SPIDER_NET_RXBUF_ALIGN - 1));
434 /* and we need to have it 128 byte aligned, therefore we allocate a
436 /* allocate an skb */
437 descr->skb = netdev_alloc_skb(card->netdev,
438 bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
440 if (netif_msg_rx_err(card) && net_ratelimit())
441 dev_err(&card->netdev->dev,
442 "Not enough memory to allocate rx buffer\n");
443 card->spider_stats.alloc_rx_skb_error++;
446 hwdescr->buf_size = bufsize;
447 hwdescr->result_size = 0;
448 hwdescr->valid_size = 0;
449 hwdescr->data_status = 0;
450 hwdescr->data_error = 0;
452 offset = ((unsigned long)descr->skb->data) &
453 (SPIDER_NET_RXBUF_ALIGN - 1);
455 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
456 /* iommu-map the skb */
457 buf = pci_map_single(card->pdev, descr->skb->data,
458 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
459 if (pci_dma_mapping_error(card->pdev, buf)) {
460 dev_kfree_skb_any(descr->skb);
462 if (netif_msg_rx_err(card) && net_ratelimit())
463 dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n");
464 card->spider_stats.rx_iommu_map_error++;
465 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
467 hwdescr->buf_addr = buf;
469 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
470 SPIDER_NET_DMAC_NOINTR_COMPLETE;
477 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
478 * @card: card structure
480 * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the
481 * chip by writing to the appropriate register. DMA is enabled in
482 * spider_net_enable_rxdmac.
485 spider_net_enable_rxchtails(struct spider_net_card *card)
487 /* assume chain is aligned correctly */
488 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
489 card->rx_chain.tail->bus_addr);
493 * spider_net_enable_rxdmac - enables a receive DMA controller
494 * @card: card structure
496 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
497 * in the GDADMACCNTR register
500 spider_net_enable_rxdmac(struct spider_net_card *card)
503 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
504 SPIDER_NET_DMA_RX_VALUE);
508 * spider_net_disable_rxdmac - disables the receive DMA controller
509 * @card: card structure
511 * spider_net_disable_rxdmac terminates processing on the DMA controller
512 * by turing off the DMA controller, with the force-end flag set.
515 spider_net_disable_rxdmac(struct spider_net_card *card)
517 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
518 SPIDER_NET_DMA_RX_FEND_VALUE);
522 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
523 * @card: card structure
525 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
528 spider_net_refill_rx_chain(struct spider_net_card *card)
530 struct spider_net_descr_chain *chain = &card->rx_chain;
533 /* one context doing the refill (and a second context seeing that
534 * and omitting it) is ok. If called by NAPI, we'll be called again
535 * as spider_net_decode_one_descr is called several times. If some
536 * interrupt calls us, the NAPI is about to clean up anyway. */
537 if (!spin_trylock_irqsave(&chain->lock, flags))
540 while (spider_net_get_descr_status(chain->head->hwdescr) ==
541 SPIDER_NET_DESCR_NOT_IN_USE) {
542 if (spider_net_prepare_rx_descr(card, chain->head))
544 chain->head = chain->head->next;
547 spin_unlock_irqrestore(&chain->lock, flags);
551 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
552 * @card: card structure
554 * Returns 0 on success, <0 on failure.
557 spider_net_alloc_rx_skbs(struct spider_net_card *card)
559 struct spider_net_descr_chain *chain = &card->rx_chain;
560 struct spider_net_descr *start = chain->tail;
561 struct spider_net_descr *descr = start;
563 /* Link up the hardware chain pointers */
565 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
567 } while (descr != start);
569 /* Put at least one buffer into the chain. if this fails,
570 * we've got a problem. If not, spider_net_refill_rx_chain
571 * will do the rest at the end of this function. */
572 if (spider_net_prepare_rx_descr(card, chain->head))
575 chain->head = chain->head->next;
577 /* This will allocate the rest of the rx buffers;
578 * if not, it's business as usual later on. */
579 spider_net_refill_rx_chain(card);
580 spider_net_enable_rxdmac(card);
584 spider_net_free_rx_chain_contents(card);
589 * spider_net_get_multicast_hash - generates hash for multicast filter table
590 * @addr: multicast address
592 * returns the hash value.
594 * spider_net_get_multicast_hash calculates a hash value for a given multicast
595 * address, that is used to set the multicast filter tables
598 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
602 char addr_for_crc[ETH_ALEN] = { 0, };
605 for (i = 0; i < ETH_ALEN * 8; i++) {
606 bit = (addr[i / 8] >> (i % 8)) & 1;
607 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
610 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
621 * spider_net_set_multi - sets multicast addresses and promisc flags
622 * @netdev: interface device structure
624 * spider_net_set_multi configures multicast addresses as needed for the
625 * netdev interface. It also sets up multicast, allmulti and promisc
626 * flags appropriately
629 spider_net_set_multi(struct net_device *netdev)
631 struct netdev_hw_addr *ha;
635 struct spider_net_card *card = netdev_priv(netdev);
636 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
639 spider_net_set_promisc(card);
641 if (netdev->flags & IFF_ALLMULTI) {
642 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
648 /* well, we know, what the broadcast hash value is: it's xfd
649 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
650 set_bit(0xfd, bitmask);
652 netdev_for_each_mc_addr(ha, netdev) {
653 hash = spider_net_get_multicast_hash(netdev, ha->addr);
654 set_bit(hash, bitmask);
658 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
660 if (test_bit(i * 4, bitmask))
663 if (test_bit(i * 4 + 1, bitmask))
666 if (test_bit(i * 4 + 2, bitmask))
669 if (test_bit(i * 4 + 3, bitmask))
672 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
677 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
678 * @card: card structure
679 * @skb: packet to use
681 * returns 0 on success, <0 on failure.
683 * fills out the descriptor structure with skb data and len. Copies data,
684 * if needed (32bit DMA!)
687 spider_net_prepare_tx_descr(struct spider_net_card *card,
690 struct spider_net_descr_chain *chain = &card->tx_chain;
691 struct spider_net_descr *descr;
692 struct spider_net_hw_descr *hwdescr;
696 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
697 if (pci_dma_mapping_error(card->pdev, buf)) {
698 if (netif_msg_tx_err(card) && net_ratelimit())
699 dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). "
700 "Dropping packet\n", skb->data, skb->len);
701 card->spider_stats.tx_iommu_map_error++;
705 spin_lock_irqsave(&chain->lock, flags);
706 descr = card->tx_chain.head;
707 if (descr->next == chain->tail->prev) {
708 spin_unlock_irqrestore(&chain->lock, flags);
709 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
712 hwdescr = descr->hwdescr;
713 chain->head = descr->next;
716 hwdescr->buf_addr = buf;
717 hwdescr->buf_size = skb->len;
718 hwdescr->next_descr_addr = 0;
719 hwdescr->data_status = 0;
721 hwdescr->dmac_cmd_status =
722 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL;
723 spin_unlock_irqrestore(&chain->lock, flags);
725 if (skb->ip_summed == CHECKSUM_PARTIAL)
726 switch (ip_hdr(skb)->protocol) {
728 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
731 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
735 /* Chain the bus address, so that the DMA engine finds this descr. */
737 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
739 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
744 spider_net_set_low_watermark(struct spider_net_card *card)
746 struct spider_net_descr *descr = card->tx_chain.tail;
747 struct spider_net_hw_descr *hwdescr;
753 /* Measure the length of the queue. Measurement does not
754 * need to be precise -- does not need a lock. */
755 while (descr != card->tx_chain.head) {
756 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
757 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
763 /* If TX queue is short, don't even bother with interrupts */
764 if (cnt < card->tx_chain.num_desc/4)
767 /* Set low-watermark 3/4th's of the way into the queue. */
768 descr = card->tx_chain.tail;
773 /* Set the new watermark, clear the old watermark */
774 spin_lock_irqsave(&card->tx_chain.lock, flags);
775 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
776 if (card->low_watermark && card->low_watermark != descr) {
777 hwdescr = card->low_watermark->hwdescr;
778 hwdescr->dmac_cmd_status =
779 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
781 card->low_watermark = descr;
782 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
787 * spider_net_release_tx_chain - processes sent tx descriptors
788 * @card: adapter structure
789 * @brutal: if set, don't care about whether descriptor seems to be in use
791 * returns 0 if the tx ring is empty, otherwise 1.
793 * spider_net_release_tx_chain releases the tx descriptors that spider has
794 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
795 * If some other context is calling this function, we return 1 so that we're
796 * scheduled again (if we were scheduled) and will not lose initiative.
799 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
801 struct net_device *dev = card->netdev;
802 struct spider_net_descr_chain *chain = &card->tx_chain;
803 struct spider_net_descr *descr;
804 struct spider_net_hw_descr *hwdescr;
811 spin_lock_irqsave(&chain->lock, flags);
812 if (chain->tail == chain->head) {
813 spin_unlock_irqrestore(&chain->lock, flags);
817 hwdescr = descr->hwdescr;
819 status = spider_net_get_descr_status(hwdescr);
821 case SPIDER_NET_DESCR_COMPLETE:
822 dev->stats.tx_packets++;
823 dev->stats.tx_bytes += descr->skb->len;
826 case SPIDER_NET_DESCR_CARDOWNED:
828 spin_unlock_irqrestore(&chain->lock, flags);
832 /* fallthrough, if we release the descriptors
833 * brutally (then we don't care about
834 * SPIDER_NET_DESCR_CARDOWNED) */
836 case SPIDER_NET_DESCR_RESPONSE_ERROR:
837 case SPIDER_NET_DESCR_PROTECTION_ERROR:
838 case SPIDER_NET_DESCR_FORCE_END:
839 if (netif_msg_tx_err(card))
840 dev_err(&card->netdev->dev, "forcing end of tx descriptor "
841 "with status x%02x\n", status);
842 dev->stats.tx_errors++;
846 dev->stats.tx_dropped++;
848 spin_unlock_irqrestore(&chain->lock, flags);
853 chain->tail = descr->next;
854 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
857 buf_addr = hwdescr->buf_addr;
858 spin_unlock_irqrestore(&chain->lock, flags);
862 pci_unmap_single(card->pdev, buf_addr, skb->len,
871 * spider_net_kick_tx_dma - enables TX DMA processing
872 * @card: card structure
874 * This routine will start the transmit DMA running if
875 * it is not already running. This routine ned only be
876 * called when queueing a new packet to an empty tx queue.
877 * Writes the current tx chain head as start address
878 * of the tx descriptor chain and enables the transmission
882 spider_net_kick_tx_dma(struct spider_net_card *card)
884 struct spider_net_descr *descr;
886 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
887 SPIDER_NET_TX_DMA_EN)
890 descr = card->tx_chain.tail;
892 if (spider_net_get_descr_status(descr->hwdescr) ==
893 SPIDER_NET_DESCR_CARDOWNED) {
894 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
896 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
897 SPIDER_NET_DMA_TX_VALUE);
900 if (descr == card->tx_chain.head)
906 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
910 * spider_net_xmit - transmits a frame over the device
911 * @skb: packet to send out
912 * @netdev: interface device structure
914 * returns 0 on success, !0 on failure
917 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
920 struct spider_net_card *card = netdev_priv(netdev);
922 spider_net_release_tx_chain(card, 0);
924 if (spider_net_prepare_tx_descr(card, skb) != 0) {
925 netdev->stats.tx_dropped++;
926 netif_stop_queue(netdev);
927 return NETDEV_TX_BUSY;
930 cnt = spider_net_set_low_watermark(card);
932 spider_net_kick_tx_dma(card);
937 * spider_net_cleanup_tx_ring - cleans up the TX ring
938 * @card: card structure
940 * spider_net_cleanup_tx_ring is called by either the tx_timer
941 * or from the NAPI polling routine.
942 * This routine releases resources associted with transmitted
943 * packets, including updating the queue tail pointer.
946 spider_net_cleanup_tx_ring(struct spider_net_card *card)
948 if ((spider_net_release_tx_chain(card, 0) != 0) &&
949 (card->netdev->flags & IFF_UP)) {
950 spider_net_kick_tx_dma(card);
951 netif_wake_queue(card->netdev);
956 * spider_net_do_ioctl - called for device ioctls
957 * @netdev: interface device structure
958 * @ifr: request parameter structure for ioctl
959 * @cmd: command code for ioctl
961 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
962 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
965 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
974 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
975 * @descr: descriptor to process
976 * @card: card structure
978 * Fills out skb structure and passes the data to the stack.
979 * The descriptor state is not changed.
982 spider_net_pass_skb_up(struct spider_net_descr *descr,
983 struct spider_net_card *card)
985 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
986 struct sk_buff *skb = descr->skb;
987 struct net_device *netdev = card->netdev;
988 u32 data_status = hwdescr->data_status;
989 u32 data_error = hwdescr->data_error;
991 skb_put(skb, hwdescr->valid_size);
993 /* the card seems to add 2 bytes of junk in front
994 * of the ethernet frame */
995 #define SPIDER_MISALIGN 2
996 skb_pull(skb, SPIDER_MISALIGN);
997 skb->protocol = eth_type_trans(skb, netdev);
999 /* checksum offload */
1000 skb_checksum_none_assert(skb);
1001 if (netdev->features & NETIF_F_RXCSUM) {
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;
1008 if (data_status & SPIDER_NET_VLAN_PACKET) {
1009 /* further enhancements: HW-accel VLAN */
1012 /* update netdevice statistics */
1013 netdev->stats.rx_packets++;
1014 netdev->stats.rx_bytes += skb->len;
1016 /* pass skb up to stack */
1017 netif_receive_skb(skb);
1020 static void show_rx_chain(struct spider_net_card *card)
1022 struct spider_net_descr_chain *chain = &card->rx_chain;
1023 struct spider_net_descr *start= chain->tail;
1024 struct spider_net_descr *descr= start;
1025 struct spider_net_hw_descr *hwd = start->hwdescr;
1026 struct device *dev = &card->netdev->dev;
1027 u32 curr_desc, next_desc;
1032 int off = start - chain->ring;
1033 int cstat = hwd->dmac_cmd_status;
1035 dev_info(dev, "Total number of descrs=%d\n",
1037 dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n",
1040 curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA);
1041 next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA);
1046 hwd = descr->hwdescr;
1047 off = descr - chain->ring;
1048 status = hwd->dmac_cmd_status;
1050 if (descr == chain->head)
1051 dev_info(dev, "Chain head is at %d, head status=0x%x\n",
1054 if (curr_desc == descr->bus_addr)
1055 dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n",
1058 if (next_desc == descr->bus_addr)
1059 dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n",
1062 if (hwd->next_descr_addr == 0)
1063 dev_info(dev, "chain is cut at %d\n", off);
1065 if (cstat != status) {
1066 int from = (chain->num_desc + off - cnt) % chain->num_desc;
1067 int to = (chain->num_desc + off - 1) % chain->num_desc;
1068 dev_info(dev, "Have %d (from %d to %d) descrs "
1069 "with stat=0x%08x\n", cnt, from, to, cstat);
1076 descr = descr->next;
1077 } while (descr != start);
1079 dev_info(dev, "Last %d descrs with stat=0x%08x "
1080 "for a total of %d descrs\n", cnt, cstat, tot);
1083 /* Now dump the whole ring */
1087 struct spider_net_hw_descr *hwd = descr->hwdescr;
1088 status = spider_net_get_descr_status(hwd);
1089 cnt = descr - chain->ring;
1090 dev_info(dev, "Descr %d stat=0x%08x skb=%p\n",
1091 cnt, status, descr->skb);
1092 dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n",
1093 descr->bus_addr, hwd->buf_addr, hwd->buf_size);
1094 dev_info(dev, "next=%08x result sz=%d valid sz=%d\n",
1095 hwd->next_descr_addr, hwd->result_size,
1097 dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n",
1098 hwd->dmac_cmd_status, hwd->data_status,
1100 dev_info(dev, "\n");
1102 descr = descr->next;
1103 } while (descr != start);
1109 * spider_net_resync_head_ptr - Advance head ptr past empty descrs
1111 * If the driver fails to keep up and empty the queue, then the
1112 * hardware wil run out of room to put incoming packets. This
1113 * will cause the hardware to skip descrs that are full (instead
1114 * of halting/retrying). Thus, once the driver runs, it wil need
1115 * to "catch up" to where the hardware chain pointer is at.
1117 static void spider_net_resync_head_ptr(struct spider_net_card *card)
1119 unsigned long flags;
1120 struct spider_net_descr_chain *chain = &card->rx_chain;
1121 struct spider_net_descr *descr;
1124 /* Advance head pointer past any empty descrs */
1125 descr = chain->head;
1126 status = spider_net_get_descr_status(descr->hwdescr);
1128 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
1131 spin_lock_irqsave(&chain->lock, flags);
1133 descr = chain->head;
1134 status = spider_net_get_descr_status(descr->hwdescr);
1135 for (i=0; i<chain->num_desc; i++) {
1136 if (status != SPIDER_NET_DESCR_CARDOWNED) break;
1137 descr = descr->next;
1138 status = spider_net_get_descr_status(descr->hwdescr);
1140 chain->head = descr;
1142 spin_unlock_irqrestore(&chain->lock, flags);
1145 static int spider_net_resync_tail_ptr(struct spider_net_card *card)
1147 struct spider_net_descr_chain *chain = &card->rx_chain;
1148 struct spider_net_descr *descr;
1151 /* Advance tail pointer past any empty and reaped descrs */
1152 descr = chain->tail;
1153 status = spider_net_get_descr_status(descr->hwdescr);
1155 for (i=0; i<chain->num_desc; i++) {
1156 if ((status != SPIDER_NET_DESCR_CARDOWNED) &&
1157 (status != SPIDER_NET_DESCR_NOT_IN_USE)) break;
1158 descr = descr->next;
1159 status = spider_net_get_descr_status(descr->hwdescr);
1161 chain->tail = descr;
1163 if ((i == chain->num_desc) || (i == 0))
1169 * spider_net_decode_one_descr - processes an RX descriptor
1170 * @card: card structure
1172 * Returns 1 if a packet has been sent to the stack, otherwise 0.
1174 * Processes an RX descriptor by iommu-unmapping the data buffer
1175 * and passing the packet up to the stack. This function is called
1176 * in softirq context, e.g. either bottom half from interrupt or
1177 * NAPI polling context.
1180 spider_net_decode_one_descr(struct spider_net_card *card)
1182 struct net_device *dev = card->netdev;
1183 struct spider_net_descr_chain *chain = &card->rx_chain;
1184 struct spider_net_descr *descr = chain->tail;
1185 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
1189 status = spider_net_get_descr_status(hwdescr);
1191 /* Nothing in the descriptor, or ring must be empty */
1192 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1193 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1196 /* descriptor definitively used -- move on tail */
1197 chain->tail = descr->next;
1199 /* unmap descriptor */
1200 hw_buf_addr = hwdescr->buf_addr;
1201 hwdescr->buf_addr = 0xffffffff;
1202 pci_unmap_single(card->pdev, hw_buf_addr,
1203 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1205 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1206 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1207 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1208 if (netif_msg_rx_err(card))
1210 "dropping RX descriptor with state %d\n", status);
1211 dev->stats.rx_dropped++;
1215 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1216 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1217 if (netif_msg_rx_err(card))
1218 dev_err(&card->netdev->dev,
1219 "RX descriptor with unknown state %d\n", status);
1220 card->spider_stats.rx_desc_unk_state++;
1224 /* The cases we'll throw away the packet immediately */
1225 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
1226 if (netif_msg_rx_err(card))
1227 dev_err(&card->netdev->dev,
1228 "error in received descriptor found, "
1229 "data_status=x%08x, data_error=x%08x\n",
1230 hwdescr->data_status, hwdescr->data_error);
1234 if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) {
1235 dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n",
1236 hwdescr->dmac_cmd_status);
1237 pr_err("buf_addr=x%08x\n", hw_buf_addr);
1238 pr_err("buf_size=x%08x\n", hwdescr->buf_size);
1239 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
1240 pr_err("result_size=x%08x\n", hwdescr->result_size);
1241 pr_err("valid_size=x%08x\n", hwdescr->valid_size);
1242 pr_err("data_status=x%08x\n", hwdescr->data_status);
1243 pr_err("data_error=x%08x\n", hwdescr->data_error);
1244 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1246 card->spider_stats.rx_desc_error++;
1250 /* Ok, we've got a packet in descr */
1251 spider_net_pass_skb_up(descr, card);
1253 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1257 if (netif_msg_rx_err(card))
1258 show_rx_chain(card);
1259 dev_kfree_skb_irq(descr->skb);
1261 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1266 * spider_net_poll - NAPI poll function called by the stack to return packets
1267 * @netdev: interface device structure
1268 * @budget: number of packets we can pass to the stack at most
1270 * returns 0 if no more packets available to the driver/stack. Returns 1,
1271 * if the quota is exceeded, but the driver has still packets.
1273 * spider_net_poll returns all packets from the rx descriptors to the stack
1274 * (using netif_receive_skb). If all/enough packets are up, the driver
1275 * reenables interrupts and returns 0. If not, 1 is returned.
1277 static int spider_net_poll(struct napi_struct *napi, int budget)
1279 struct spider_net_card *card = container_of(napi, struct spider_net_card, napi);
1280 int packets_done = 0;
1282 while (packets_done < budget) {
1283 if (!spider_net_decode_one_descr(card))
1289 if ((packets_done == 0) && (card->num_rx_ints != 0)) {
1290 if (!spider_net_resync_tail_ptr(card))
1291 packets_done = budget;
1292 spider_net_resync_head_ptr(card);
1294 card->num_rx_ints = 0;
1296 spider_net_refill_rx_chain(card);
1297 spider_net_enable_rxdmac(card);
1299 spider_net_cleanup_tx_ring(card);
1301 /* if all packets are in the stack, enable interrupts and return 0 */
1302 /* if not, return 1 */
1303 if (packets_done < budget) {
1304 napi_complete(napi);
1305 spider_net_rx_irq_on(card);
1306 card->ignore_rx_ramfull = 0;
1309 return packets_done;
1313 * spider_net_change_mtu - changes the MTU of an interface
1314 * @netdev: interface device structure
1315 * @new_mtu: new MTU value
1317 * returns 0 on success, <0 on failure
1320 spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1322 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1323 * and mtu is outbound only anyway */
1324 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1325 (new_mtu > SPIDER_NET_MAX_MTU) )
1327 netdev->mtu = new_mtu;
1332 * spider_net_set_mac - sets the MAC of an interface
1333 * @netdev: interface device structure
1334 * @ptr: pointer to new MAC address
1336 * Returns 0 on success, <0 on failure. Currently, we don't support this
1337 * and will always return EOPNOTSUPP.
1340 spider_net_set_mac(struct net_device *netdev, void *p)
1342 struct spider_net_card *card = netdev_priv(netdev);
1343 u32 macl, macu, regvalue;
1344 struct sockaddr *addr = p;
1346 if (!is_valid_ether_addr(addr->sa_data))
1347 return -EADDRNOTAVAIL;
1349 /* switch off GMACTPE and GMACRPE */
1350 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1351 regvalue &= ~((1 << 5) | (1 << 6));
1352 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1355 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1356 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1357 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1358 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1359 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1361 /* switch GMACTPE and GMACRPE back on */
1362 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1363 regvalue |= ((1 << 5) | (1 << 6));
1364 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1366 spider_net_set_promisc(card);
1368 /* look up, whether we have been successful */
1369 if (spider_net_get_mac_address(netdev))
1370 return -EADDRNOTAVAIL;
1371 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1372 return -EADDRNOTAVAIL;
1378 * spider_net_link_reset
1379 * @netdev: net device structure
1381 * This is called when the PHY_LINK signal is asserted. For the blade this is
1382 * not connected so we should never get here.
1386 spider_net_link_reset(struct net_device *netdev)
1389 struct spider_net_card *card = netdev_priv(netdev);
1391 del_timer_sync(&card->aneg_timer);
1393 /* clear interrupt, block further interrupts */
1394 spider_net_write_reg(card, SPIDER_NET_GMACST,
1395 spider_net_read_reg(card, SPIDER_NET_GMACST));
1396 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1398 /* reset phy and setup aneg */
1399 card->aneg_count = 0;
1400 card->medium = BCM54XX_COPPER;
1401 spider_net_setup_aneg(card);
1402 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1407 * spider_net_handle_error_irq - handles errors raised by an interrupt
1408 * @card: card structure
1409 * @status_reg: interrupt status register 0 (GHIINT0STS)
1411 * spider_net_handle_error_irq treats or ignores all error conditions
1412 * found when an interrupt is presented
1415 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg,
1416 u32 error_reg1, u32 error_reg2)
1421 /* check GHIINT0STS ************************************/
1423 for (i = 0; i < 32; i++)
1424 if (status_reg & (1<<i))
1427 /* let error_reg1 and error_reg2 evaluation decide, what to do
1428 case SPIDER_NET_PHYINT:
1429 case SPIDER_NET_GMAC2INT:
1430 case SPIDER_NET_GMAC1INT:
1431 case SPIDER_NET_GFIFOINT:
1432 case SPIDER_NET_DMACINT:
1433 case SPIDER_NET_GSYSINT:
1436 case SPIDER_NET_GIPSINT:
1440 case SPIDER_NET_GPWOPCMPINT:
1441 /* PHY write operation completed */
1444 case SPIDER_NET_GPROPCMPINT:
1445 /* PHY read operation completed */
1446 /* we don't use semaphores, as we poll for the completion
1447 * of the read operation in spider_net_read_phy. Should take
1451 case SPIDER_NET_GPWFFINT:
1452 /* PHY command queue full */
1453 if (netif_msg_intr(card))
1454 dev_err(&card->netdev->dev, "PHY write queue full\n");
1458 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1459 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1460 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1462 case SPIDER_NET_GDTDEN0INT:
1463 /* someone has set TX_DMA_EN to 0 */
1467 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1468 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1469 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1470 case SPIDER_NET_GDADEN0INT:
1471 /* someone has set RX_DMA_EN to 0 */
1476 case SPIDER_NET_GDDFDCINT:
1477 case SPIDER_NET_GDCFDCINT:
1478 case SPIDER_NET_GDBFDCINT:
1479 case SPIDER_NET_GDAFDCINT:
1480 /* case SPIDER_NET_GDNMINT: not used. print a message */
1481 /* case SPIDER_NET_GCNMINT: not used. print a message */
1482 /* case SPIDER_NET_GBNMINT: not used. print a message */
1483 /* case SPIDER_NET_GANMINT: not used. print a message */
1484 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1489 case SPIDER_NET_GDTFDCINT:
1492 case SPIDER_NET_GTTEDINT:
1495 case SPIDER_NET_GDTDCEINT:
1496 /* chain end. If a descriptor should be sent, kick off
1498 if (card->tx_chain.tail != card->tx_chain.head)
1499 spider_net_kick_tx_dma(card);
1504 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1505 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1508 /* check GHIINT1STS ************************************/
1510 for (i = 0; i < 32; i++)
1511 if (error_reg1 & (1<<i))
1514 case SPIDER_NET_GTMFLLINT:
1515 /* TX RAM full may happen on a usual case.
1516 * Logging is not needed. */
1519 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1520 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1521 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1522 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1523 case SPIDER_NET_GRMFLLINT:
1524 /* Could happen when rx chain is full */
1525 if (card->ignore_rx_ramfull == 0) {
1526 card->ignore_rx_ramfull = 1;
1527 spider_net_resync_head_ptr(card);
1528 spider_net_refill_rx_chain(card);
1529 spider_net_enable_rxdmac(card);
1530 card->num_rx_ints ++;
1531 napi_schedule(&card->napi);
1536 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1537 case SPIDER_NET_GDTINVDINT:
1538 /* allrighty. tx from previous descr ok */
1543 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1544 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1545 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1546 case SPIDER_NET_GDADCEINT:
1547 spider_net_resync_head_ptr(card);
1548 spider_net_refill_rx_chain(card);
1549 spider_net_enable_rxdmac(card);
1550 card->num_rx_ints ++;
1551 napi_schedule(&card->napi);
1555 /* invalid descriptor */
1556 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1557 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1558 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1559 case SPIDER_NET_GDAINVDINT:
1560 /* Could happen when rx chain is full */
1561 spider_net_resync_head_ptr(card);
1562 spider_net_refill_rx_chain(card);
1563 spider_net_enable_rxdmac(card);
1564 card->num_rx_ints ++;
1565 napi_schedule(&card->napi);
1569 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1570 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1571 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1572 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1573 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1574 /* case SPIDER_NET_GDSERINT: problem, print a message */
1575 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1576 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1577 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1578 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1579 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1585 /* check GHIINT2STS ************************************/
1587 for (i = 0; i < 32; i++)
1588 if (error_reg2 & (1<<i))
1591 /* there is nothing we can (want to) do at this time. Log a
1592 * message, we can switch on and off the specific values later on
1593 case SPIDER_NET_GPROPERINT:
1594 case SPIDER_NET_GMCTCRSNGINT:
1595 case SPIDER_NET_GMCTLCOLINT:
1596 case SPIDER_NET_GMCTTMOTINT:
1597 case SPIDER_NET_GMCRCAERINT:
1598 case SPIDER_NET_GMCRCALERINT:
1599 case SPIDER_NET_GMCRALNERINT:
1600 case SPIDER_NET_GMCROVRINT:
1601 case SPIDER_NET_GMCRRNTINT:
1602 case SPIDER_NET_GMCRRXERINT:
1603 case SPIDER_NET_GTITCSERINT:
1604 case SPIDER_NET_GTIFMTERINT:
1605 case SPIDER_NET_GTIPKTRVKINT:
1606 case SPIDER_NET_GTISPINGINT:
1607 case SPIDER_NET_GTISADNGINT:
1608 case SPIDER_NET_GTISPDNGINT:
1609 case SPIDER_NET_GRIFMTERINT:
1610 case SPIDER_NET_GRIPKTRVKINT:
1611 case SPIDER_NET_GRISPINGINT:
1612 case SPIDER_NET_GRISADNGINT:
1613 case SPIDER_NET_GRISPDNGINT:
1620 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
1621 dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, "
1622 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1623 status_reg, error_reg1, error_reg2);
1625 /* clear interrupt sources */
1626 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1627 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1631 * spider_net_interrupt - interrupt handler for spider_net
1632 * @irq: interrupt number
1633 * @ptr: pointer to net_device
1635 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1636 * interrupt found raised by card.
1638 * This is the interrupt handler, that turns off
1639 * interrupts for this device and makes the stack poll the driver
1642 spider_net_interrupt(int irq, void *ptr)
1644 struct net_device *netdev = ptr;
1645 struct spider_net_card *card = netdev_priv(netdev);
1646 u32 status_reg, error_reg1, error_reg2;
1648 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1649 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1650 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1652 if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) &&
1653 !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) &&
1654 !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE))
1657 if (status_reg & SPIDER_NET_RXINT ) {
1658 spider_net_rx_irq_off(card);
1659 napi_schedule(&card->napi);
1660 card->num_rx_ints ++;
1662 if (status_reg & SPIDER_NET_TXINT)
1663 napi_schedule(&card->napi);
1665 if (status_reg & SPIDER_NET_LINKINT)
1666 spider_net_link_reset(netdev);
1668 if (status_reg & SPIDER_NET_ERRINT )
1669 spider_net_handle_error_irq(card, status_reg,
1670 error_reg1, error_reg2);
1672 /* clear interrupt sources */
1673 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1678 #ifdef CONFIG_NET_POLL_CONTROLLER
1680 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1681 * @netdev: interface device structure
1683 * see Documentation/networking/netconsole.txt
1686 spider_net_poll_controller(struct net_device *netdev)
1688 disable_irq(netdev->irq);
1689 spider_net_interrupt(netdev->irq, netdev);
1690 enable_irq(netdev->irq);
1692 #endif /* CONFIG_NET_POLL_CONTROLLER */
1695 * spider_net_enable_interrupts - enable interrupts
1696 * @card: card structure
1698 * spider_net_enable_interrupt enables several interrupts
1701 spider_net_enable_interrupts(struct spider_net_card *card)
1703 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1704 SPIDER_NET_INT0_MASK_VALUE);
1705 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1706 SPIDER_NET_INT1_MASK_VALUE);
1707 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1708 SPIDER_NET_INT2_MASK_VALUE);
1712 * spider_net_disable_interrupts - disable interrupts
1713 * @card: card structure
1715 * spider_net_disable_interrupts disables all the interrupts
1718 spider_net_disable_interrupts(struct spider_net_card *card)
1720 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1721 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1722 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1723 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1727 * spider_net_init_card - initializes the card
1728 * @card: card structure
1730 * spider_net_init_card initializes the card so that other registers can
1734 spider_net_init_card(struct spider_net_card *card)
1736 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1737 SPIDER_NET_CKRCTRL_STOP_VALUE);
1739 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1740 SPIDER_NET_CKRCTRL_RUN_VALUE);
1742 /* trigger ETOMOD signal */
1743 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1744 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1746 spider_net_disable_interrupts(card);
1750 * spider_net_enable_card - enables the card by setting all kinds of regs
1751 * @card: card structure
1753 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1756 spider_net_enable_card(struct spider_net_card *card)
1759 /* the following array consists of (register),(value) pairs
1760 * that are set in this function. A register of 0 ends the list */
1762 { SPIDER_NET_GRESUMINTNUM, 0 },
1763 { SPIDER_NET_GREINTNUM, 0 },
1765 /* set interrupt frame number registers */
1766 /* clear the single DMA engine registers first */
1767 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1768 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1769 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1770 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1771 /* then set, what we really need */
1772 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1774 /* timer counter registers and stuff */
1775 { SPIDER_NET_GFREECNNUM, 0 },
1776 { SPIDER_NET_GONETIMENUM, 0 },
1777 { SPIDER_NET_GTOUTFRMNUM, 0 },
1779 /* RX mode setting */
1780 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1781 /* TX mode setting */
1782 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1783 /* IPSEC mode setting */
1784 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1786 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1788 { SPIDER_NET_GMRWOLCTRL, 0 },
1789 { SPIDER_NET_GTESTMD, 0x10000000 },
1790 { SPIDER_NET_GTTQMSK, 0x00400040 },
1792 { SPIDER_NET_GMACINTEN, 0 },
1794 /* flow control stuff */
1795 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1796 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1798 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1803 while (regs[i][0]) {
1804 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1808 /* clear unicast filter table entries 1 to 14 */
1809 for (i = 1; i <= 14; i++) {
1810 spider_net_write_reg(card,
1811 SPIDER_NET_GMRUAFILnR + i * 8,
1813 spider_net_write_reg(card,
1814 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1818 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1820 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1822 /* set chain tail address for RX chains and
1824 spider_net_enable_rxchtails(card);
1825 spider_net_enable_rxdmac(card);
1827 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1829 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1830 SPIDER_NET_LENLMT_VALUE);
1831 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1832 SPIDER_NET_OPMODE_VALUE);
1834 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1835 SPIDER_NET_GDTBSTA);
1839 * spider_net_download_firmware - loads firmware into the adapter
1840 * @card: card structure
1841 * @firmware_ptr: pointer to firmware data
1843 * spider_net_download_firmware loads the firmware data into the
1844 * adapter. It assumes the length etc. to be allright.
1847 spider_net_download_firmware(struct spider_net_card *card,
1848 const void *firmware_ptr)
1851 const u32 *fw_ptr = firmware_ptr;
1853 /* stop sequencers */
1854 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1855 SPIDER_NET_STOP_SEQ_VALUE);
1857 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1859 spider_net_write_reg(card,
1860 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1861 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1862 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1863 sequencer * 8, *fw_ptr);
1868 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1871 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1872 SPIDER_NET_RUN_SEQ_VALUE);
1878 * spider_net_init_firmware - reads in firmware parts
1879 * @card: card structure
1881 * Returns 0 on success, <0 on failure
1883 * spider_net_init_firmware opens the sequencer firmware and does some basic
1884 * checks. This function opens and releases the firmware structure. A call
1885 * to download the firmware is performed before the release.
1889 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1890 * the program for each sequencer. Use the command
1891 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1892 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1893 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1895 * to generate spider_fw.bin, if you have sequencer programs with something
1896 * like the following contents for each sequencer:
1897 * <ONE LINE COMMENT>
1898 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1899 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1901 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1904 spider_net_init_firmware(struct spider_net_card *card)
1906 struct firmware *firmware = NULL;
1907 struct device_node *dn;
1908 const u8 *fw_prop = NULL;
1912 if (request_firmware((const struct firmware **)&firmware,
1913 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1914 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1915 netif_msg_probe(card) ) {
1916 dev_err(&card->netdev->dev,
1917 "Incorrect size of spidernet firmware in " \
1918 "filesystem. Looking in host firmware...\n");
1921 err = spider_net_download_firmware(card, firmware->data);
1923 release_firmware(firmware);
1931 dn = pci_device_to_OF_node(card->pdev);
1935 fw_prop = of_get_property(dn, "firmware", &fw_size);
1939 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1940 netif_msg_probe(card) ) {
1941 dev_err(&card->netdev->dev,
1942 "Incorrect size of spidernet firmware in host firmware\n");
1946 err = spider_net_download_firmware(card, fw_prop);
1951 if (netif_msg_probe(card))
1952 dev_err(&card->netdev->dev,
1953 "Couldn't find spidernet firmware in filesystem " \
1954 "or host firmware\n");
1959 * spider_net_open - called upon ifonfig up
1960 * @netdev: interface device structure
1962 * returns 0 on success, <0 on failure
1964 * spider_net_open allocates all the descriptors and memory needed for
1965 * operation, sets up multicast list and enables interrupts
1968 spider_net_open(struct net_device *netdev)
1970 struct spider_net_card *card = netdev_priv(netdev);
1973 result = spider_net_init_firmware(card);
1975 goto init_firmware_failed;
1977 /* start probing with copper */
1978 card->aneg_count = 0;
1979 card->medium = BCM54XX_COPPER;
1980 spider_net_setup_aneg(card);
1981 if (card->phy.def->phy_id)
1982 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1984 result = spider_net_init_chain(card, &card->tx_chain);
1986 goto alloc_tx_failed;
1987 card->low_watermark = NULL;
1989 result = spider_net_init_chain(card, &card->rx_chain);
1991 goto alloc_rx_failed;
1993 /* Allocate rx skbs */
1994 if (spider_net_alloc_rx_skbs(card))
1995 goto alloc_skbs_failed;
1997 spider_net_set_multi(netdev);
1999 /* further enhancement: setup hw vlan, if needed */
2002 if (request_irq(netdev->irq, spider_net_interrupt,
2003 IRQF_SHARED, netdev->name, netdev))
2004 goto register_int_failed;
2006 spider_net_enable_card(card);
2008 netif_start_queue(netdev);
2009 netif_carrier_on(netdev);
2010 napi_enable(&card->napi);
2012 spider_net_enable_interrupts(card);
2016 register_int_failed:
2017 spider_net_free_rx_chain_contents(card);
2019 spider_net_free_chain(card, &card->rx_chain);
2021 spider_net_free_chain(card, &card->tx_chain);
2023 del_timer_sync(&card->aneg_timer);
2024 init_firmware_failed:
2029 * spider_net_link_phy
2030 * @data: used for pointer to card structure
2033 static void spider_net_link_phy(unsigned long data)
2035 struct spider_net_card *card = (struct spider_net_card *)data;
2036 struct mii_phy *phy = &card->phy;
2038 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
2039 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
2041 pr_debug("%s: link is down trying to bring it up\n",
2042 card->netdev->name);
2044 switch (card->medium) {
2045 case BCM54XX_COPPER:
2046 /* enable fiber with autonegotiation first */
2047 if (phy->def->ops->enable_fiber)
2048 phy->def->ops->enable_fiber(phy, 1);
2049 card->medium = BCM54XX_FIBER;
2053 /* fiber didn't come up, try to disable fiber autoneg */
2054 if (phy->def->ops->enable_fiber)
2055 phy->def->ops->enable_fiber(phy, 0);
2056 card->medium = BCM54XX_UNKNOWN;
2059 case BCM54XX_UNKNOWN:
2060 /* copper, fiber with and without failed,
2061 * retry from beginning */
2062 spider_net_setup_aneg(card);
2063 card->medium = BCM54XX_COPPER;
2067 card->aneg_count = 0;
2068 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2072 /* link still not up, try again later */
2073 if (!(phy->def->ops->poll_link(phy))) {
2075 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2079 /* link came up, get abilities */
2080 phy->def->ops->read_link(phy);
2082 spider_net_write_reg(card, SPIDER_NET_GMACST,
2083 spider_net_read_reg(card, SPIDER_NET_GMACST));
2084 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
2086 if (phy->speed == 1000)
2087 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
2089 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
2091 card->aneg_count = 0;
2093 pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n",
2094 card->netdev->name, phy->speed,
2095 phy->duplex == 1 ? "Full" : "Half",
2096 phy->autoneg == 1 ? "" : "no ");
2100 * spider_net_setup_phy - setup PHY
2101 * @card: card structure
2103 * returns 0 on success, <0 on failure
2105 * spider_net_setup_phy is used as part of spider_net_probe.
2108 spider_net_setup_phy(struct spider_net_card *card)
2110 struct mii_phy *phy = &card->phy;
2112 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
2113 SPIDER_NET_DMASEL_VALUE);
2114 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
2115 SPIDER_NET_PHY_CTRL_VALUE);
2117 phy->dev = card->netdev;
2118 phy->mdio_read = spider_net_read_phy;
2119 phy->mdio_write = spider_net_write_phy;
2121 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
2123 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
2124 if (id != 0x0000 && id != 0xffff) {
2125 if (!sungem_phy_probe(phy, phy->mii_id)) {
2126 pr_info("Found %s.\n", phy->def->name);
2136 * spider_net_workaround_rxramfull - work around firmware bug
2137 * @card: card structure
2142 spider_net_workaround_rxramfull(struct spider_net_card *card)
2144 int i, sequencer = 0;
2147 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2148 SPIDER_NET_CKRCTRL_RUN_VALUE);
2150 /* empty sequencer data */
2151 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2153 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
2154 sequencer * 8, 0x0);
2155 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
2156 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2157 sequencer * 8, 0x0);
2161 /* set sequencer operation */
2162 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2165 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2166 SPIDER_NET_CKRCTRL_STOP_VALUE);
2170 * spider_net_stop - called upon ifconfig down
2171 * @netdev: interface device structure
2176 spider_net_stop(struct net_device *netdev)
2178 struct spider_net_card *card = netdev_priv(netdev);
2180 napi_disable(&card->napi);
2181 netif_carrier_off(netdev);
2182 netif_stop_queue(netdev);
2183 del_timer_sync(&card->tx_timer);
2184 del_timer_sync(&card->aneg_timer);
2186 spider_net_disable_interrupts(card);
2188 free_irq(netdev->irq, netdev);
2190 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2191 SPIDER_NET_DMA_TX_FEND_VALUE);
2193 /* turn off DMA, force end */
2194 spider_net_disable_rxdmac(card);
2196 /* release chains */
2197 spider_net_release_tx_chain(card, 1);
2198 spider_net_free_rx_chain_contents(card);
2200 spider_net_free_chain(card, &card->tx_chain);
2201 spider_net_free_chain(card, &card->rx_chain);
2207 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2208 * function (to be called not under interrupt status)
2209 * @data: data, is interface device structure
2211 * called as task when tx hangs, resets interface (if interface is up)
2214 spider_net_tx_timeout_task(struct work_struct *work)
2216 struct spider_net_card *card =
2217 container_of(work, struct spider_net_card, tx_timeout_task);
2218 struct net_device *netdev = card->netdev;
2220 if (!(netdev->flags & IFF_UP))
2223 netif_device_detach(netdev);
2224 spider_net_stop(netdev);
2226 spider_net_workaround_rxramfull(card);
2227 spider_net_init_card(card);
2229 if (spider_net_setup_phy(card))
2232 spider_net_open(netdev);
2233 spider_net_kick_tx_dma(card);
2234 netif_device_attach(netdev);
2237 atomic_dec(&card->tx_timeout_task_counter);
2241 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2242 * @netdev: interface device structure
2244 * called, if tx hangs. Schedules a task that resets the interface
2247 spider_net_tx_timeout(struct net_device *netdev)
2249 struct spider_net_card *card;
2251 card = netdev_priv(netdev);
2252 atomic_inc(&card->tx_timeout_task_counter);
2253 if (netdev->flags & IFF_UP)
2254 schedule_work(&card->tx_timeout_task);
2256 atomic_dec(&card->tx_timeout_task_counter);
2257 card->spider_stats.tx_timeouts++;
2260 static const struct net_device_ops spider_net_ops = {
2261 .ndo_open = spider_net_open,
2262 .ndo_stop = spider_net_stop,
2263 .ndo_start_xmit = spider_net_xmit,
2264 .ndo_set_rx_mode = spider_net_set_multi,
2265 .ndo_set_mac_address = spider_net_set_mac,
2266 .ndo_change_mtu = spider_net_change_mtu,
2267 .ndo_do_ioctl = spider_net_do_ioctl,
2268 .ndo_tx_timeout = spider_net_tx_timeout,
2269 .ndo_validate_addr = eth_validate_addr,
2271 #ifdef CONFIG_NET_POLL_CONTROLLER
2272 /* poll controller */
2273 .ndo_poll_controller = spider_net_poll_controller,
2274 #endif /* CONFIG_NET_POLL_CONTROLLER */
2278 * spider_net_setup_netdev_ops - initialization of net_device operations
2279 * @netdev: net_device structure
2281 * fills out function pointers in the net_device structure
2284 spider_net_setup_netdev_ops(struct net_device *netdev)
2286 netdev->netdev_ops = &spider_net_ops;
2287 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2289 netdev->ethtool_ops = &spider_net_ethtool_ops;
2293 * spider_net_setup_netdev - initialization of net_device
2294 * @card: card structure
2296 * Returns 0 on success or <0 on failure
2298 * spider_net_setup_netdev initializes the net_device structure
2301 spider_net_setup_netdev(struct spider_net_card *card)
2304 struct net_device *netdev = card->netdev;
2305 struct device_node *dn;
2306 struct sockaddr addr;
2309 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2311 pci_set_drvdata(card->pdev, netdev);
2313 init_timer(&card->tx_timer);
2314 card->tx_timer.function =
2315 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2316 card->tx_timer.data = (unsigned long) card;
2317 netdev->irq = card->pdev->irq;
2319 card->aneg_count = 0;
2320 init_timer(&card->aneg_timer);
2321 card->aneg_timer.function = spider_net_link_phy;
2322 card->aneg_timer.data = (unsigned long) card;
2324 netif_napi_add(netdev, &card->napi,
2325 spider_net_poll, SPIDER_NET_NAPI_WEIGHT);
2327 spider_net_setup_netdev_ops(netdev);
2329 netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2330 if (SPIDER_NET_RX_CSUM_DEFAULT)
2331 netdev->features |= NETIF_F_RXCSUM;
2332 netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX;
2333 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2334 * NETIF_F_HW_VLAN_FILTER */
2336 netdev->irq = card->pdev->irq;
2337 card->num_rx_ints = 0;
2338 card->ignore_rx_ramfull = 0;
2340 dn = pci_device_to_OF_node(card->pdev);
2344 mac = of_get_property(dn, "local-mac-address", NULL);
2347 memcpy(addr.sa_data, mac, ETH_ALEN);
2349 result = spider_net_set_mac(netdev, &addr);
2350 if ((result) && (netif_msg_probe(card)))
2351 dev_err(&card->netdev->dev,
2352 "Failed to set MAC address: %i\n", result);
2354 result = register_netdev(netdev);
2356 if (netif_msg_probe(card))
2357 dev_err(&card->netdev->dev,
2358 "Couldn't register net_device: %i\n", result);
2362 if (netif_msg_probe(card))
2363 pr_info("Initialized device %s.\n", netdev->name);
2369 * spider_net_alloc_card - allocates net_device and card structure
2371 * returns the card structure or NULL in case of errors
2373 * the card and net_device structures are linked to each other
2375 static struct spider_net_card *
2376 spider_net_alloc_card(void)
2378 struct net_device *netdev;
2379 struct spider_net_card *card;
2382 alloc_size = sizeof(struct spider_net_card) +
2383 (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr);
2384 netdev = alloc_etherdev(alloc_size);
2388 card = netdev_priv(netdev);
2389 card->netdev = netdev;
2390 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2391 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
2392 init_waitqueue_head(&card->waitq);
2393 atomic_set(&card->tx_timeout_task_counter, 0);
2395 card->rx_chain.num_desc = rx_descriptors;
2396 card->rx_chain.ring = card->darray;
2397 card->tx_chain.num_desc = tx_descriptors;
2398 card->tx_chain.ring = card->darray + rx_descriptors;
2404 * spider_net_undo_pci_setup - releases PCI ressources
2405 * @card: card structure
2407 * spider_net_undo_pci_setup releases the mapped regions
2410 spider_net_undo_pci_setup(struct spider_net_card *card)
2412 iounmap(card->regs);
2413 pci_release_regions(card->pdev);
2417 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2420 * Returns the card structure or NULL if any errors occur
2422 * spider_net_setup_pci_dev initializes pdev and together with the
2423 * functions called in spider_net_open configures the device so that
2424 * data can be transferred over it
2425 * The net_device structure is attached to the card structure, if the
2426 * function returns without error.
2428 static struct spider_net_card *
2429 spider_net_setup_pci_dev(struct pci_dev *pdev)
2431 struct spider_net_card *card;
2432 unsigned long mmio_start, mmio_len;
2434 if (pci_enable_device(pdev)) {
2435 dev_err(&pdev->dev, "Couldn't enable PCI device\n");
2439 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2441 "Couldn't find proper PCI device base address.\n");
2442 goto out_disable_dev;
2445 if (pci_request_regions(pdev, spider_net_driver_name)) {
2447 "Couldn't obtain PCI resources, aborting.\n");
2448 goto out_disable_dev;
2451 pci_set_master(pdev);
2453 card = spider_net_alloc_card();
2456 "Couldn't allocate net_device structure, aborting.\n");
2457 goto out_release_regions;
2461 /* fetch base address and length of first resource */
2462 mmio_start = pci_resource_start(pdev, 0);
2463 mmio_len = pci_resource_len(pdev, 0);
2465 card->netdev->mem_start = mmio_start;
2466 card->netdev->mem_end = mmio_start + mmio_len;
2467 card->regs = ioremap(mmio_start, mmio_len);
2471 "Couldn't obtain PCI resources, aborting.\n");
2472 goto out_release_regions;
2477 out_release_regions:
2478 pci_release_regions(pdev);
2480 pci_disable_device(pdev);
2481 pci_set_drvdata(pdev, NULL);
2486 * spider_net_probe - initialization of a device
2488 * @ent: entry in the device id list
2490 * Returns 0 on success, <0 on failure
2492 * spider_net_probe initializes pdev and registers a net_device
2493 * structure for it. After that, the device can be ifconfig'ed up
2496 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2499 struct spider_net_card *card;
2501 card = spider_net_setup_pci_dev(pdev);
2505 spider_net_workaround_rxramfull(card);
2506 spider_net_init_card(card);
2508 err = spider_net_setup_phy(card);
2512 err = spider_net_setup_netdev(card);
2519 spider_net_undo_pci_setup(card);
2520 free_netdev(card->netdev);
2526 * spider_net_remove - removal of a device
2529 * Returns 0 on success, <0 on failure
2531 * spider_net_remove is called to remove the device and unregisters the
2535 spider_net_remove(struct pci_dev *pdev)
2537 struct net_device *netdev;
2538 struct spider_net_card *card;
2540 netdev = pci_get_drvdata(pdev);
2541 card = netdev_priv(netdev);
2543 wait_event(card->waitq,
2544 atomic_read(&card->tx_timeout_task_counter) == 0);
2546 unregister_netdev(netdev);
2548 /* switch off card */
2549 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2550 SPIDER_NET_CKRCTRL_STOP_VALUE);
2551 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2552 SPIDER_NET_CKRCTRL_RUN_VALUE);
2554 spider_net_undo_pci_setup(card);
2555 free_netdev(netdev);
2558 static struct pci_driver spider_net_driver = {
2559 .name = spider_net_driver_name,
2560 .id_table = spider_net_pci_tbl,
2561 .probe = spider_net_probe,
2562 .remove = spider_net_remove
2566 * spider_net_init - init function when the driver is loaded
2568 * spider_net_init registers the device driver
2570 static int __init spider_net_init(void)
2572 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2574 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2575 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2576 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2578 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2579 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2580 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2582 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2583 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2584 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2586 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2587 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2588 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2591 return pci_register_driver(&spider_net_driver);
2595 * spider_net_cleanup - exit function when driver is unloaded
2597 * spider_net_cleanup unregisters the device driver
2599 static void __exit spider_net_cleanup(void)
2601 pci_unregister_driver(&spider_net_driver);
2604 module_init(spider_net_init);
2605 module_exit(spider_net_cleanup);