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 const struct pci_device_id 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_descr_status -- returns the status of a descriptor
271 * @descr: descriptor to look at
273 * returns the status as in the dmac_cmd_status field of the descriptor
276 spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
278 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
282 * spider_net_free_chain - free descriptor chain
283 * @card: card structure
284 * @chain: address of chain
288 spider_net_free_chain(struct spider_net_card *card,
289 struct spider_net_descr_chain *chain)
291 struct spider_net_descr *descr;
296 descr->hwdescr->next_descr_addr = 0;
298 } while (descr != chain->ring);
300 dma_free_coherent(&card->pdev->dev, chain->num_desc,
301 chain->hwring, chain->dma_addr);
305 * spider_net_init_chain - alloc and link descriptor chain
306 * @card: card structure
307 * @chain: address of chain
309 * We manage a circular list that mirrors the hardware structure,
310 * except that the hardware uses bus addresses.
312 * Returns 0 on success, <0 on failure
315 spider_net_init_chain(struct spider_net_card *card,
316 struct spider_net_descr_chain *chain)
319 struct spider_net_descr *descr;
320 struct spider_net_hw_descr *hwdescr;
324 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
326 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
327 &chain->dma_addr, GFP_KERNEL);
331 memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr));
333 /* Set up the hardware pointers in each descriptor */
335 hwdescr = chain->hwring;
336 buf = chain->dma_addr;
337 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
338 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
339 hwdescr->next_descr_addr = 0;
341 descr->hwdescr = hwdescr;
342 descr->bus_addr = buf;
343 descr->next = descr + 1;
344 descr->prev = descr - 1;
346 buf += sizeof(struct spider_net_hw_descr);
348 /* do actual circular list */
349 (descr-1)->next = chain->ring;
350 chain->ring->prev = descr-1;
352 spin_lock_init(&chain->lock);
353 chain->head = chain->ring;
354 chain->tail = chain->ring;
359 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
360 * @card: card structure
362 * returns 0 on success, <0 on failure
365 spider_net_free_rx_chain_contents(struct spider_net_card *card)
367 struct spider_net_descr *descr;
369 descr = card->rx_chain.head;
372 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
373 SPIDER_NET_MAX_FRAME,
374 PCI_DMA_BIDIRECTIONAL);
375 dev_kfree_skb(descr->skb);
379 } while (descr != card->rx_chain.head);
383 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
384 * @card: card structure
385 * @descr: descriptor to re-init
387 * Return 0 on success, <0 on failure.
389 * Allocates a new rx skb, iommu-maps it and attaches it to the
390 * descriptor. Mark the descriptor as activated, ready-to-use.
393 spider_net_prepare_rx_descr(struct spider_net_card *card,
394 struct spider_net_descr *descr)
396 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
401 /* we need to round up the buffer size to a multiple of 128 */
402 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
403 (~(SPIDER_NET_RXBUF_ALIGN - 1));
405 /* and we need to have it 128 byte aligned, therefore we allocate a
407 /* allocate an skb */
408 descr->skb = netdev_alloc_skb(card->netdev,
409 bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
411 if (netif_msg_rx_err(card) && net_ratelimit())
412 dev_err(&card->netdev->dev,
413 "Not enough memory to allocate rx buffer\n");
414 card->spider_stats.alloc_rx_skb_error++;
417 hwdescr->buf_size = bufsize;
418 hwdescr->result_size = 0;
419 hwdescr->valid_size = 0;
420 hwdescr->data_status = 0;
421 hwdescr->data_error = 0;
423 offset = ((unsigned long)descr->skb->data) &
424 (SPIDER_NET_RXBUF_ALIGN - 1);
426 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
427 /* iommu-map the skb */
428 buf = pci_map_single(card->pdev, descr->skb->data,
429 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
430 if (pci_dma_mapping_error(card->pdev, buf)) {
431 dev_kfree_skb_any(descr->skb);
433 if (netif_msg_rx_err(card) && net_ratelimit())
434 dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n");
435 card->spider_stats.rx_iommu_map_error++;
436 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
438 hwdescr->buf_addr = buf;
440 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
441 SPIDER_NET_DMAC_NOINTR_COMPLETE;
448 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
449 * @card: card structure
451 * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the
452 * chip by writing to the appropriate register. DMA is enabled in
453 * spider_net_enable_rxdmac.
456 spider_net_enable_rxchtails(struct spider_net_card *card)
458 /* assume chain is aligned correctly */
459 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
460 card->rx_chain.tail->bus_addr);
464 * spider_net_enable_rxdmac - enables a receive DMA controller
465 * @card: card structure
467 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
468 * in the GDADMACCNTR register
471 spider_net_enable_rxdmac(struct spider_net_card *card)
474 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
475 SPIDER_NET_DMA_RX_VALUE);
479 * spider_net_disable_rxdmac - disables the receive DMA controller
480 * @card: card structure
482 * spider_net_disable_rxdmac terminates processing on the DMA controller
483 * by turing off the DMA controller, with the force-end flag set.
486 spider_net_disable_rxdmac(struct spider_net_card *card)
488 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
489 SPIDER_NET_DMA_RX_FEND_VALUE);
493 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
494 * @card: card structure
496 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
499 spider_net_refill_rx_chain(struct spider_net_card *card)
501 struct spider_net_descr_chain *chain = &card->rx_chain;
504 /* one context doing the refill (and a second context seeing that
505 * and omitting it) is ok. If called by NAPI, we'll be called again
506 * as spider_net_decode_one_descr is called several times. If some
507 * interrupt calls us, the NAPI is about to clean up anyway. */
508 if (!spin_trylock_irqsave(&chain->lock, flags))
511 while (spider_net_get_descr_status(chain->head->hwdescr) ==
512 SPIDER_NET_DESCR_NOT_IN_USE) {
513 if (spider_net_prepare_rx_descr(card, chain->head))
515 chain->head = chain->head->next;
518 spin_unlock_irqrestore(&chain->lock, flags);
522 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
523 * @card: card structure
525 * Returns 0 on success, <0 on failure.
528 spider_net_alloc_rx_skbs(struct spider_net_card *card)
530 struct spider_net_descr_chain *chain = &card->rx_chain;
531 struct spider_net_descr *start = chain->tail;
532 struct spider_net_descr *descr = start;
534 /* Link up the hardware chain pointers */
536 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
538 } while (descr != start);
540 /* Put at least one buffer into the chain. if this fails,
541 * we've got a problem. If not, spider_net_refill_rx_chain
542 * will do the rest at the end of this function. */
543 if (spider_net_prepare_rx_descr(card, chain->head))
546 chain->head = chain->head->next;
548 /* This will allocate the rest of the rx buffers;
549 * if not, it's business as usual later on. */
550 spider_net_refill_rx_chain(card);
551 spider_net_enable_rxdmac(card);
555 spider_net_free_rx_chain_contents(card);
560 * spider_net_get_multicast_hash - generates hash for multicast filter table
561 * @addr: multicast address
563 * returns the hash value.
565 * spider_net_get_multicast_hash calculates a hash value for a given multicast
566 * address, that is used to set the multicast filter tables
569 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
573 char addr_for_crc[ETH_ALEN] = { 0, };
576 for (i = 0; i < ETH_ALEN * 8; i++) {
577 bit = (addr[i / 8] >> (i % 8)) & 1;
578 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
581 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
592 * spider_net_set_multi - sets multicast addresses and promisc flags
593 * @netdev: interface device structure
595 * spider_net_set_multi configures multicast addresses as needed for the
596 * netdev interface. It also sets up multicast, allmulti and promisc
597 * flags appropriately
600 spider_net_set_multi(struct net_device *netdev)
602 struct netdev_hw_addr *ha;
606 struct spider_net_card *card = netdev_priv(netdev);
607 DECLARE_BITMAP(bitmask, SPIDER_NET_MULTICAST_HASHES) = {};
609 spider_net_set_promisc(card);
611 if (netdev->flags & IFF_ALLMULTI) {
612 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
618 /* well, we know, what the broadcast hash value is: it's xfd
619 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
620 set_bit(0xfd, bitmask);
622 netdev_for_each_mc_addr(ha, netdev) {
623 hash = spider_net_get_multicast_hash(netdev, ha->addr);
624 set_bit(hash, bitmask);
628 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
630 if (test_bit(i * 4, bitmask))
633 if (test_bit(i * 4 + 1, bitmask))
636 if (test_bit(i * 4 + 2, bitmask))
639 if (test_bit(i * 4 + 3, bitmask))
642 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
647 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
648 * @card: card structure
649 * @skb: packet to use
651 * returns 0 on success, <0 on failure.
653 * fills out the descriptor structure with skb data and len. Copies data,
654 * if needed (32bit DMA!)
657 spider_net_prepare_tx_descr(struct spider_net_card *card,
660 struct spider_net_descr_chain *chain = &card->tx_chain;
661 struct spider_net_descr *descr;
662 struct spider_net_hw_descr *hwdescr;
666 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
667 if (pci_dma_mapping_error(card->pdev, buf)) {
668 if (netif_msg_tx_err(card) && net_ratelimit())
669 dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). "
670 "Dropping packet\n", skb->data, skb->len);
671 card->spider_stats.tx_iommu_map_error++;
675 spin_lock_irqsave(&chain->lock, flags);
676 descr = card->tx_chain.head;
677 if (descr->next == chain->tail->prev) {
678 spin_unlock_irqrestore(&chain->lock, flags);
679 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
682 hwdescr = descr->hwdescr;
683 chain->head = descr->next;
686 hwdescr->buf_addr = buf;
687 hwdescr->buf_size = skb->len;
688 hwdescr->next_descr_addr = 0;
689 hwdescr->data_status = 0;
691 hwdescr->dmac_cmd_status =
692 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL;
693 spin_unlock_irqrestore(&chain->lock, flags);
695 if (skb->ip_summed == CHECKSUM_PARTIAL)
696 switch (ip_hdr(skb)->protocol) {
698 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
701 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
705 /* Chain the bus address, so that the DMA engine finds this descr. */
707 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
709 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
714 spider_net_set_low_watermark(struct spider_net_card *card)
716 struct spider_net_descr *descr = card->tx_chain.tail;
717 struct spider_net_hw_descr *hwdescr;
723 /* Measure the length of the queue. Measurement does not
724 * need to be precise -- does not need a lock. */
725 while (descr != card->tx_chain.head) {
726 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
727 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
733 /* If TX queue is short, don't even bother with interrupts */
734 if (cnt < card->tx_chain.num_desc/4)
737 /* Set low-watermark 3/4th's of the way into the queue. */
738 descr = card->tx_chain.tail;
743 /* Set the new watermark, clear the old watermark */
744 spin_lock_irqsave(&card->tx_chain.lock, flags);
745 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
746 if (card->low_watermark && card->low_watermark != descr) {
747 hwdescr = card->low_watermark->hwdescr;
748 hwdescr->dmac_cmd_status =
749 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
751 card->low_watermark = descr;
752 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
757 * spider_net_release_tx_chain - processes sent tx descriptors
758 * @card: adapter structure
759 * @brutal: if set, don't care about whether descriptor seems to be in use
761 * returns 0 if the tx ring is empty, otherwise 1.
763 * spider_net_release_tx_chain releases the tx descriptors that spider has
764 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
765 * If some other context is calling this function, we return 1 so that we're
766 * scheduled again (if we were scheduled) and will not lose initiative.
769 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
771 struct net_device *dev = card->netdev;
772 struct spider_net_descr_chain *chain = &card->tx_chain;
773 struct spider_net_descr *descr;
774 struct spider_net_hw_descr *hwdescr;
781 spin_lock_irqsave(&chain->lock, flags);
782 if (chain->tail == chain->head) {
783 spin_unlock_irqrestore(&chain->lock, flags);
787 hwdescr = descr->hwdescr;
789 status = spider_net_get_descr_status(hwdescr);
791 case SPIDER_NET_DESCR_COMPLETE:
792 dev->stats.tx_packets++;
793 dev->stats.tx_bytes += descr->skb->len;
796 case SPIDER_NET_DESCR_CARDOWNED:
798 spin_unlock_irqrestore(&chain->lock, flags);
802 /* fallthrough, if we release the descriptors
803 * brutally (then we don't care about
804 * SPIDER_NET_DESCR_CARDOWNED) */
806 case SPIDER_NET_DESCR_RESPONSE_ERROR:
807 case SPIDER_NET_DESCR_PROTECTION_ERROR:
808 case SPIDER_NET_DESCR_FORCE_END:
809 if (netif_msg_tx_err(card))
810 dev_err(&card->netdev->dev, "forcing end of tx descriptor "
811 "with status x%02x\n", status);
812 dev->stats.tx_errors++;
816 dev->stats.tx_dropped++;
818 spin_unlock_irqrestore(&chain->lock, flags);
823 chain->tail = descr->next;
824 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
827 buf_addr = hwdescr->buf_addr;
828 spin_unlock_irqrestore(&chain->lock, flags);
832 pci_unmap_single(card->pdev, buf_addr, skb->len,
834 dev_consume_skb_any(skb);
841 * spider_net_kick_tx_dma - enables TX DMA processing
842 * @card: card structure
844 * This routine will start the transmit DMA running if
845 * it is not already running. This routine ned only be
846 * called when queueing a new packet to an empty tx queue.
847 * Writes the current tx chain head as start address
848 * of the tx descriptor chain and enables the transmission
852 spider_net_kick_tx_dma(struct spider_net_card *card)
854 struct spider_net_descr *descr;
856 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
857 SPIDER_NET_TX_DMA_EN)
860 descr = card->tx_chain.tail;
862 if (spider_net_get_descr_status(descr->hwdescr) ==
863 SPIDER_NET_DESCR_CARDOWNED) {
864 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
866 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
867 SPIDER_NET_DMA_TX_VALUE);
870 if (descr == card->tx_chain.head)
876 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
880 * spider_net_xmit - transmits a frame over the device
881 * @skb: packet to send out
882 * @netdev: interface device structure
884 * returns 0 on success, !0 on failure
887 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
890 struct spider_net_card *card = netdev_priv(netdev);
892 spider_net_release_tx_chain(card, 0);
894 if (spider_net_prepare_tx_descr(card, skb) != 0) {
895 netdev->stats.tx_dropped++;
896 netif_stop_queue(netdev);
897 return NETDEV_TX_BUSY;
900 cnt = spider_net_set_low_watermark(card);
902 spider_net_kick_tx_dma(card);
907 * spider_net_cleanup_tx_ring - cleans up the TX ring
908 * @card: card structure
910 * spider_net_cleanup_tx_ring is called by either the tx_timer
911 * or from the NAPI polling routine.
912 * This routine releases resources associted with transmitted
913 * packets, including updating the queue tail pointer.
916 spider_net_cleanup_tx_ring(struct spider_net_card *card)
918 if ((spider_net_release_tx_chain(card, 0) != 0) &&
919 (card->netdev->flags & IFF_UP)) {
920 spider_net_kick_tx_dma(card);
921 netif_wake_queue(card->netdev);
926 * spider_net_do_ioctl - called for device ioctls
927 * @netdev: interface device structure
928 * @ifr: request parameter structure for ioctl
929 * @cmd: command code for ioctl
931 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
932 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
935 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
944 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
945 * @descr: descriptor to process
946 * @card: card structure
948 * Fills out skb structure and passes the data to the stack.
949 * The descriptor state is not changed.
952 spider_net_pass_skb_up(struct spider_net_descr *descr,
953 struct spider_net_card *card)
955 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
956 struct sk_buff *skb = descr->skb;
957 struct net_device *netdev = card->netdev;
958 u32 data_status = hwdescr->data_status;
959 u32 data_error = hwdescr->data_error;
961 skb_put(skb, hwdescr->valid_size);
963 /* the card seems to add 2 bytes of junk in front
964 * of the ethernet frame */
965 #define SPIDER_MISALIGN 2
966 skb_pull(skb, SPIDER_MISALIGN);
967 skb->protocol = eth_type_trans(skb, netdev);
969 /* checksum offload */
970 skb_checksum_none_assert(skb);
971 if (netdev->features & NETIF_F_RXCSUM) {
972 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
973 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
974 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
975 skb->ip_summed = CHECKSUM_UNNECESSARY;
978 if (data_status & SPIDER_NET_VLAN_PACKET) {
979 /* further enhancements: HW-accel VLAN */
982 /* update netdevice statistics */
983 netdev->stats.rx_packets++;
984 netdev->stats.rx_bytes += skb->len;
986 /* pass skb up to stack */
987 netif_receive_skb(skb);
990 static void show_rx_chain(struct spider_net_card *card)
992 struct spider_net_descr_chain *chain = &card->rx_chain;
993 struct spider_net_descr *start= chain->tail;
994 struct spider_net_descr *descr= start;
995 struct spider_net_hw_descr *hwd = start->hwdescr;
996 struct device *dev = &card->netdev->dev;
997 u32 curr_desc, next_desc;
1002 int off = start - chain->ring;
1003 int cstat = hwd->dmac_cmd_status;
1005 dev_info(dev, "Total number of descrs=%d\n",
1007 dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n",
1010 curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA);
1011 next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA);
1016 hwd = descr->hwdescr;
1017 off = descr - chain->ring;
1018 status = hwd->dmac_cmd_status;
1020 if (descr == chain->head)
1021 dev_info(dev, "Chain head is at %d, head status=0x%x\n",
1024 if (curr_desc == descr->bus_addr)
1025 dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n",
1028 if (next_desc == descr->bus_addr)
1029 dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n",
1032 if (hwd->next_descr_addr == 0)
1033 dev_info(dev, "chain is cut at %d\n", off);
1035 if (cstat != status) {
1036 int from = (chain->num_desc + off - cnt) % chain->num_desc;
1037 int to = (chain->num_desc + off - 1) % chain->num_desc;
1038 dev_info(dev, "Have %d (from %d to %d) descrs "
1039 "with stat=0x%08x\n", cnt, from, to, cstat);
1046 descr = descr->next;
1047 } while (descr != start);
1049 dev_info(dev, "Last %d descrs with stat=0x%08x "
1050 "for a total of %d descrs\n", cnt, cstat, tot);
1053 /* Now dump the whole ring */
1057 struct spider_net_hw_descr *hwd = descr->hwdescr;
1058 status = spider_net_get_descr_status(hwd);
1059 cnt = descr - chain->ring;
1060 dev_info(dev, "Descr %d stat=0x%08x skb=%p\n",
1061 cnt, status, descr->skb);
1062 dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n",
1063 descr->bus_addr, hwd->buf_addr, hwd->buf_size);
1064 dev_info(dev, "next=%08x result sz=%d valid sz=%d\n",
1065 hwd->next_descr_addr, hwd->result_size,
1067 dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n",
1068 hwd->dmac_cmd_status, hwd->data_status,
1070 dev_info(dev, "\n");
1072 descr = descr->next;
1073 } while (descr != start);
1079 * spider_net_resync_head_ptr - Advance head ptr past empty descrs
1081 * If the driver fails to keep up and empty the queue, then the
1082 * hardware wil run out of room to put incoming packets. This
1083 * will cause the hardware to skip descrs that are full (instead
1084 * of halting/retrying). Thus, once the driver runs, it wil need
1085 * to "catch up" to where the hardware chain pointer is at.
1087 static void spider_net_resync_head_ptr(struct spider_net_card *card)
1089 unsigned long flags;
1090 struct spider_net_descr_chain *chain = &card->rx_chain;
1091 struct spider_net_descr *descr;
1094 /* Advance head pointer past any empty descrs */
1095 descr = chain->head;
1096 status = spider_net_get_descr_status(descr->hwdescr);
1098 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
1101 spin_lock_irqsave(&chain->lock, flags);
1103 descr = chain->head;
1104 status = spider_net_get_descr_status(descr->hwdescr);
1105 for (i=0; i<chain->num_desc; i++) {
1106 if (status != SPIDER_NET_DESCR_CARDOWNED) break;
1107 descr = descr->next;
1108 status = spider_net_get_descr_status(descr->hwdescr);
1110 chain->head = descr;
1112 spin_unlock_irqrestore(&chain->lock, flags);
1115 static int spider_net_resync_tail_ptr(struct spider_net_card *card)
1117 struct spider_net_descr_chain *chain = &card->rx_chain;
1118 struct spider_net_descr *descr;
1121 /* Advance tail pointer past any empty and reaped descrs */
1122 descr = chain->tail;
1123 status = spider_net_get_descr_status(descr->hwdescr);
1125 for (i=0; i<chain->num_desc; i++) {
1126 if ((status != SPIDER_NET_DESCR_CARDOWNED) &&
1127 (status != SPIDER_NET_DESCR_NOT_IN_USE)) break;
1128 descr = descr->next;
1129 status = spider_net_get_descr_status(descr->hwdescr);
1131 chain->tail = descr;
1133 if ((i == chain->num_desc) || (i == 0))
1139 * spider_net_decode_one_descr - processes an RX descriptor
1140 * @card: card structure
1142 * Returns 1 if a packet has been sent to the stack, otherwise 0.
1144 * Processes an RX descriptor by iommu-unmapping the data buffer
1145 * and passing the packet up to the stack. This function is called
1146 * in softirq context, e.g. either bottom half from interrupt or
1147 * NAPI polling context.
1150 spider_net_decode_one_descr(struct spider_net_card *card)
1152 struct net_device *dev = card->netdev;
1153 struct spider_net_descr_chain *chain = &card->rx_chain;
1154 struct spider_net_descr *descr = chain->tail;
1155 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
1159 status = spider_net_get_descr_status(hwdescr);
1161 /* Nothing in the descriptor, or ring must be empty */
1162 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1163 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1166 /* descriptor definitively used -- move on tail */
1167 chain->tail = descr->next;
1169 /* unmap descriptor */
1170 hw_buf_addr = hwdescr->buf_addr;
1171 hwdescr->buf_addr = 0xffffffff;
1172 pci_unmap_single(card->pdev, hw_buf_addr,
1173 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1175 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1176 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1177 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1178 if (netif_msg_rx_err(card))
1180 "dropping RX descriptor with state %d\n", status);
1181 dev->stats.rx_dropped++;
1185 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1186 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1187 if (netif_msg_rx_err(card))
1188 dev_err(&card->netdev->dev,
1189 "RX descriptor with unknown state %d\n", status);
1190 card->spider_stats.rx_desc_unk_state++;
1194 /* The cases we'll throw away the packet immediately */
1195 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
1196 if (netif_msg_rx_err(card))
1197 dev_err(&card->netdev->dev,
1198 "error in received descriptor found, "
1199 "data_status=x%08x, data_error=x%08x\n",
1200 hwdescr->data_status, hwdescr->data_error);
1204 if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) {
1205 dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n",
1206 hwdescr->dmac_cmd_status);
1207 pr_err("buf_addr=x%08x\n", hw_buf_addr);
1208 pr_err("buf_size=x%08x\n", hwdescr->buf_size);
1209 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
1210 pr_err("result_size=x%08x\n", hwdescr->result_size);
1211 pr_err("valid_size=x%08x\n", hwdescr->valid_size);
1212 pr_err("data_status=x%08x\n", hwdescr->data_status);
1213 pr_err("data_error=x%08x\n", hwdescr->data_error);
1214 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1216 card->spider_stats.rx_desc_error++;
1220 /* Ok, we've got a packet in descr */
1221 spider_net_pass_skb_up(descr, card);
1223 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1227 if (netif_msg_rx_err(card))
1228 show_rx_chain(card);
1229 dev_kfree_skb_irq(descr->skb);
1231 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1236 * spider_net_poll - NAPI poll function called by the stack to return packets
1237 * @netdev: interface device structure
1238 * @budget: number of packets we can pass to the stack at most
1240 * returns 0 if no more packets available to the driver/stack. Returns 1,
1241 * if the quota is exceeded, but the driver has still packets.
1243 * spider_net_poll returns all packets from the rx descriptors to the stack
1244 * (using netif_receive_skb). If all/enough packets are up, the driver
1245 * reenables interrupts and returns 0. If not, 1 is returned.
1247 static int spider_net_poll(struct napi_struct *napi, int budget)
1249 struct spider_net_card *card = container_of(napi, struct spider_net_card, napi);
1250 int packets_done = 0;
1252 while (packets_done < budget) {
1253 if (!spider_net_decode_one_descr(card))
1259 if ((packets_done == 0) && (card->num_rx_ints != 0)) {
1260 if (!spider_net_resync_tail_ptr(card))
1261 packets_done = budget;
1262 spider_net_resync_head_ptr(card);
1264 card->num_rx_ints = 0;
1266 spider_net_refill_rx_chain(card);
1267 spider_net_enable_rxdmac(card);
1269 spider_net_cleanup_tx_ring(card);
1271 /* if all packets are in the stack, enable interrupts and return 0 */
1272 /* if not, return 1 */
1273 if (packets_done < budget) {
1274 napi_complete(napi);
1275 spider_net_rx_irq_on(card);
1276 card->ignore_rx_ramfull = 0;
1279 return packets_done;
1283 * spider_net_change_mtu - changes the MTU of an interface
1284 * @netdev: interface device structure
1285 * @new_mtu: new MTU value
1287 * returns 0 on success, <0 on failure
1290 spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1292 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1293 * and mtu is outbound only anyway */
1294 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1295 (new_mtu > SPIDER_NET_MAX_MTU) )
1297 netdev->mtu = new_mtu;
1302 * spider_net_set_mac - sets the MAC of an interface
1303 * @netdev: interface device structure
1304 * @ptr: pointer to new MAC address
1306 * Returns 0 on success, <0 on failure. Currently, we don't support this
1307 * and will always return EOPNOTSUPP.
1310 spider_net_set_mac(struct net_device *netdev, void *p)
1312 struct spider_net_card *card = netdev_priv(netdev);
1313 u32 macl, macu, regvalue;
1314 struct sockaddr *addr = p;
1316 if (!is_valid_ether_addr(addr->sa_data))
1317 return -EADDRNOTAVAIL;
1319 memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
1321 /* switch off GMACTPE and GMACRPE */
1322 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1323 regvalue &= ~((1 << 5) | (1 << 6));
1324 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1327 macu = (netdev->dev_addr[0]<<24) + (netdev->dev_addr[1]<<16) +
1328 (netdev->dev_addr[2]<<8) + (netdev->dev_addr[3]);
1329 macl = (netdev->dev_addr[4]<<8) + (netdev->dev_addr[5]);
1330 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1331 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1333 /* switch GMACTPE and GMACRPE back on */
1334 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1335 regvalue |= ((1 << 5) | (1 << 6));
1336 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1338 spider_net_set_promisc(card);
1344 * spider_net_link_reset
1345 * @netdev: net device structure
1347 * This is called when the PHY_LINK signal is asserted. For the blade this is
1348 * not connected so we should never get here.
1352 spider_net_link_reset(struct net_device *netdev)
1355 struct spider_net_card *card = netdev_priv(netdev);
1357 del_timer_sync(&card->aneg_timer);
1359 /* clear interrupt, block further interrupts */
1360 spider_net_write_reg(card, SPIDER_NET_GMACST,
1361 spider_net_read_reg(card, SPIDER_NET_GMACST));
1362 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1364 /* reset phy and setup aneg */
1365 card->aneg_count = 0;
1366 card->medium = BCM54XX_COPPER;
1367 spider_net_setup_aneg(card);
1368 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1373 * spider_net_handle_error_irq - handles errors raised by an interrupt
1374 * @card: card structure
1375 * @status_reg: interrupt status register 0 (GHIINT0STS)
1377 * spider_net_handle_error_irq treats or ignores all error conditions
1378 * found when an interrupt is presented
1381 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg,
1382 u32 error_reg1, u32 error_reg2)
1387 /* check GHIINT0STS ************************************/
1389 for (i = 0; i < 32; i++)
1390 if (status_reg & (1<<i))
1393 /* let error_reg1 and error_reg2 evaluation decide, what to do
1394 case SPIDER_NET_PHYINT:
1395 case SPIDER_NET_GMAC2INT:
1396 case SPIDER_NET_GMAC1INT:
1397 case SPIDER_NET_GFIFOINT:
1398 case SPIDER_NET_DMACINT:
1399 case SPIDER_NET_GSYSINT:
1402 case SPIDER_NET_GIPSINT:
1406 case SPIDER_NET_GPWOPCMPINT:
1407 /* PHY write operation completed */
1410 case SPIDER_NET_GPROPCMPINT:
1411 /* PHY read operation completed */
1412 /* we don't use semaphores, as we poll for the completion
1413 * of the read operation in spider_net_read_phy. Should take
1417 case SPIDER_NET_GPWFFINT:
1418 /* PHY command queue full */
1419 if (netif_msg_intr(card))
1420 dev_err(&card->netdev->dev, "PHY write queue full\n");
1424 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1425 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1426 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1428 case SPIDER_NET_GDTDEN0INT:
1429 /* someone has set TX_DMA_EN to 0 */
1433 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1434 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1435 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1436 case SPIDER_NET_GDADEN0INT:
1437 /* someone has set RX_DMA_EN to 0 */
1442 case SPIDER_NET_GDDFDCINT:
1443 case SPIDER_NET_GDCFDCINT:
1444 case SPIDER_NET_GDBFDCINT:
1445 case SPIDER_NET_GDAFDCINT:
1446 /* case SPIDER_NET_GDNMINT: not used. print a message */
1447 /* case SPIDER_NET_GCNMINT: not used. print a message */
1448 /* case SPIDER_NET_GBNMINT: not used. print a message */
1449 /* case SPIDER_NET_GANMINT: not used. print a message */
1450 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1455 case SPIDER_NET_GDTFDCINT:
1458 case SPIDER_NET_GTTEDINT:
1461 case SPIDER_NET_GDTDCEINT:
1462 /* chain end. If a descriptor should be sent, kick off
1464 if (card->tx_chain.tail != card->tx_chain.head)
1465 spider_net_kick_tx_dma(card);
1470 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1471 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1474 /* check GHIINT1STS ************************************/
1476 for (i = 0; i < 32; i++)
1477 if (error_reg1 & (1<<i))
1480 case SPIDER_NET_GTMFLLINT:
1481 /* TX RAM full may happen on a usual case.
1482 * Logging is not needed. */
1485 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1486 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1487 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1488 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1489 case SPIDER_NET_GRMFLLINT:
1490 /* Could happen when rx chain is full */
1491 if (card->ignore_rx_ramfull == 0) {
1492 card->ignore_rx_ramfull = 1;
1493 spider_net_resync_head_ptr(card);
1494 spider_net_refill_rx_chain(card);
1495 spider_net_enable_rxdmac(card);
1496 card->num_rx_ints ++;
1497 napi_schedule(&card->napi);
1502 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1503 case SPIDER_NET_GDTINVDINT:
1504 /* allrighty. tx from previous descr ok */
1509 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1510 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1511 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1512 case SPIDER_NET_GDADCEINT:
1513 spider_net_resync_head_ptr(card);
1514 spider_net_refill_rx_chain(card);
1515 spider_net_enable_rxdmac(card);
1516 card->num_rx_ints ++;
1517 napi_schedule(&card->napi);
1521 /* invalid descriptor */
1522 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1523 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1524 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1525 case SPIDER_NET_GDAINVDINT:
1526 /* Could happen when rx chain is full */
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);
1535 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1536 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1537 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1538 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1539 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1540 /* case SPIDER_NET_GDSERINT: problem, print a message */
1541 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1542 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1543 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1544 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1545 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1551 /* check GHIINT2STS ************************************/
1553 for (i = 0; i < 32; i++)
1554 if (error_reg2 & (1<<i))
1557 /* there is nothing we can (want to) do at this time. Log a
1558 * message, we can switch on and off the specific values later on
1559 case SPIDER_NET_GPROPERINT:
1560 case SPIDER_NET_GMCTCRSNGINT:
1561 case SPIDER_NET_GMCTLCOLINT:
1562 case SPIDER_NET_GMCTTMOTINT:
1563 case SPIDER_NET_GMCRCAERINT:
1564 case SPIDER_NET_GMCRCALERINT:
1565 case SPIDER_NET_GMCRALNERINT:
1566 case SPIDER_NET_GMCROVRINT:
1567 case SPIDER_NET_GMCRRNTINT:
1568 case SPIDER_NET_GMCRRXERINT:
1569 case SPIDER_NET_GTITCSERINT:
1570 case SPIDER_NET_GTIFMTERINT:
1571 case SPIDER_NET_GTIPKTRVKINT:
1572 case SPIDER_NET_GTISPINGINT:
1573 case SPIDER_NET_GTISADNGINT:
1574 case SPIDER_NET_GTISPDNGINT:
1575 case SPIDER_NET_GRIFMTERINT:
1576 case SPIDER_NET_GRIPKTRVKINT:
1577 case SPIDER_NET_GRISPINGINT:
1578 case SPIDER_NET_GRISADNGINT:
1579 case SPIDER_NET_GRISPDNGINT:
1586 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
1587 dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, "
1588 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1589 status_reg, error_reg1, error_reg2);
1591 /* clear interrupt sources */
1592 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1593 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1597 * spider_net_interrupt - interrupt handler for spider_net
1598 * @irq: interrupt number
1599 * @ptr: pointer to net_device
1601 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1602 * interrupt found raised by card.
1604 * This is the interrupt handler, that turns off
1605 * interrupts for this device and makes the stack poll the driver
1608 spider_net_interrupt(int irq, void *ptr)
1610 struct net_device *netdev = ptr;
1611 struct spider_net_card *card = netdev_priv(netdev);
1612 u32 status_reg, error_reg1, error_reg2;
1614 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1615 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1616 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1618 if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) &&
1619 !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) &&
1620 !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE))
1623 if (status_reg & SPIDER_NET_RXINT ) {
1624 spider_net_rx_irq_off(card);
1625 napi_schedule(&card->napi);
1626 card->num_rx_ints ++;
1628 if (status_reg & SPIDER_NET_TXINT)
1629 napi_schedule(&card->napi);
1631 if (status_reg & SPIDER_NET_LINKINT)
1632 spider_net_link_reset(netdev);
1634 if (status_reg & SPIDER_NET_ERRINT )
1635 spider_net_handle_error_irq(card, status_reg,
1636 error_reg1, error_reg2);
1638 /* clear interrupt sources */
1639 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1644 #ifdef CONFIG_NET_POLL_CONTROLLER
1646 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1647 * @netdev: interface device structure
1649 * see Documentation/networking/netconsole.txt
1652 spider_net_poll_controller(struct net_device *netdev)
1654 disable_irq(netdev->irq);
1655 spider_net_interrupt(netdev->irq, netdev);
1656 enable_irq(netdev->irq);
1658 #endif /* CONFIG_NET_POLL_CONTROLLER */
1661 * spider_net_enable_interrupts - enable interrupts
1662 * @card: card structure
1664 * spider_net_enable_interrupt enables several interrupts
1667 spider_net_enable_interrupts(struct spider_net_card *card)
1669 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1670 SPIDER_NET_INT0_MASK_VALUE);
1671 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1672 SPIDER_NET_INT1_MASK_VALUE);
1673 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1674 SPIDER_NET_INT2_MASK_VALUE);
1678 * spider_net_disable_interrupts - disable interrupts
1679 * @card: card structure
1681 * spider_net_disable_interrupts disables all the interrupts
1684 spider_net_disable_interrupts(struct spider_net_card *card)
1686 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1687 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1688 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1689 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1693 * spider_net_init_card - initializes the card
1694 * @card: card structure
1696 * spider_net_init_card initializes the card so that other registers can
1700 spider_net_init_card(struct spider_net_card *card)
1702 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1703 SPIDER_NET_CKRCTRL_STOP_VALUE);
1705 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1706 SPIDER_NET_CKRCTRL_RUN_VALUE);
1708 /* trigger ETOMOD signal */
1709 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1710 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1712 spider_net_disable_interrupts(card);
1716 * spider_net_enable_card - enables the card by setting all kinds of regs
1717 * @card: card structure
1719 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1722 spider_net_enable_card(struct spider_net_card *card)
1725 /* the following array consists of (register),(value) pairs
1726 * that are set in this function. A register of 0 ends the list */
1728 { SPIDER_NET_GRESUMINTNUM, 0 },
1729 { SPIDER_NET_GREINTNUM, 0 },
1731 /* set interrupt frame number registers */
1732 /* clear the single DMA engine registers first */
1733 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1734 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1735 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1736 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1737 /* then set, what we really need */
1738 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1740 /* timer counter registers and stuff */
1741 { SPIDER_NET_GFREECNNUM, 0 },
1742 { SPIDER_NET_GONETIMENUM, 0 },
1743 { SPIDER_NET_GTOUTFRMNUM, 0 },
1745 /* RX mode setting */
1746 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1747 /* TX mode setting */
1748 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1749 /* IPSEC mode setting */
1750 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1752 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1754 { SPIDER_NET_GMRWOLCTRL, 0 },
1755 { SPIDER_NET_GTESTMD, 0x10000000 },
1756 { SPIDER_NET_GTTQMSK, 0x00400040 },
1758 { SPIDER_NET_GMACINTEN, 0 },
1760 /* flow control stuff */
1761 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1762 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1764 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1769 while (regs[i][0]) {
1770 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1774 /* clear unicast filter table entries 1 to 14 */
1775 for (i = 1; i <= 14; i++) {
1776 spider_net_write_reg(card,
1777 SPIDER_NET_GMRUAFILnR + i * 8,
1779 spider_net_write_reg(card,
1780 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1784 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1786 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1788 /* set chain tail address for RX chains and
1790 spider_net_enable_rxchtails(card);
1791 spider_net_enable_rxdmac(card);
1793 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1795 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1796 SPIDER_NET_LENLMT_VALUE);
1797 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1798 SPIDER_NET_OPMODE_VALUE);
1800 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1801 SPIDER_NET_GDTBSTA);
1805 * spider_net_download_firmware - loads firmware into the adapter
1806 * @card: card structure
1807 * @firmware_ptr: pointer to firmware data
1809 * spider_net_download_firmware loads the firmware data into the
1810 * adapter. It assumes the length etc. to be allright.
1813 spider_net_download_firmware(struct spider_net_card *card,
1814 const void *firmware_ptr)
1817 const u32 *fw_ptr = firmware_ptr;
1819 /* stop sequencers */
1820 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1821 SPIDER_NET_STOP_SEQ_VALUE);
1823 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1825 spider_net_write_reg(card,
1826 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1827 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1828 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1829 sequencer * 8, *fw_ptr);
1834 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1837 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1838 SPIDER_NET_RUN_SEQ_VALUE);
1844 * spider_net_init_firmware - reads in firmware parts
1845 * @card: card structure
1847 * Returns 0 on success, <0 on failure
1849 * spider_net_init_firmware opens the sequencer firmware and does some basic
1850 * checks. This function opens and releases the firmware structure. A call
1851 * to download the firmware is performed before the release.
1855 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1856 * the program for each sequencer. Use the command
1857 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1858 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1859 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1861 * to generate spider_fw.bin, if you have sequencer programs with something
1862 * like the following contents for each sequencer:
1863 * <ONE LINE COMMENT>
1864 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1865 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1867 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1870 spider_net_init_firmware(struct spider_net_card *card)
1872 struct firmware *firmware = NULL;
1873 struct device_node *dn;
1874 const u8 *fw_prop = NULL;
1878 if (request_firmware((const struct firmware **)&firmware,
1879 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1880 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1881 netif_msg_probe(card) ) {
1882 dev_err(&card->netdev->dev,
1883 "Incorrect size of spidernet firmware in " \
1884 "filesystem. Looking in host firmware...\n");
1887 err = spider_net_download_firmware(card, firmware->data);
1889 release_firmware(firmware);
1897 dn = pci_device_to_OF_node(card->pdev);
1901 fw_prop = of_get_property(dn, "firmware", &fw_size);
1905 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1906 netif_msg_probe(card) ) {
1907 dev_err(&card->netdev->dev,
1908 "Incorrect size of spidernet firmware in host firmware\n");
1912 err = spider_net_download_firmware(card, fw_prop);
1917 if (netif_msg_probe(card))
1918 dev_err(&card->netdev->dev,
1919 "Couldn't find spidernet firmware in filesystem " \
1920 "or host firmware\n");
1925 * spider_net_open - called upon ifonfig up
1926 * @netdev: interface device structure
1928 * returns 0 on success, <0 on failure
1930 * spider_net_open allocates all the descriptors and memory needed for
1931 * operation, sets up multicast list and enables interrupts
1934 spider_net_open(struct net_device *netdev)
1936 struct spider_net_card *card = netdev_priv(netdev);
1939 result = spider_net_init_firmware(card);
1941 goto init_firmware_failed;
1943 /* start probing with copper */
1944 card->aneg_count = 0;
1945 card->medium = BCM54XX_COPPER;
1946 spider_net_setup_aneg(card);
1947 if (card->phy.def->phy_id)
1948 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1950 result = spider_net_init_chain(card, &card->tx_chain);
1952 goto alloc_tx_failed;
1953 card->low_watermark = NULL;
1955 result = spider_net_init_chain(card, &card->rx_chain);
1957 goto alloc_rx_failed;
1959 /* Allocate rx skbs */
1960 result = spider_net_alloc_rx_skbs(card);
1962 goto alloc_skbs_failed;
1964 spider_net_set_multi(netdev);
1966 /* further enhancement: setup hw vlan, if needed */
1969 if (request_irq(netdev->irq, spider_net_interrupt,
1970 IRQF_SHARED, netdev->name, netdev))
1971 goto register_int_failed;
1973 spider_net_enable_card(card);
1975 netif_start_queue(netdev);
1976 netif_carrier_on(netdev);
1977 napi_enable(&card->napi);
1979 spider_net_enable_interrupts(card);
1983 register_int_failed:
1984 spider_net_free_rx_chain_contents(card);
1986 spider_net_free_chain(card, &card->rx_chain);
1988 spider_net_free_chain(card, &card->tx_chain);
1990 del_timer_sync(&card->aneg_timer);
1991 init_firmware_failed:
1996 * spider_net_link_phy
1997 * @data: used for pointer to card structure
2000 static void spider_net_link_phy(unsigned long data)
2002 struct spider_net_card *card = (struct spider_net_card *)data;
2003 struct mii_phy *phy = &card->phy;
2005 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
2006 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
2008 pr_debug("%s: link is down trying to bring it up\n",
2009 card->netdev->name);
2011 switch (card->medium) {
2012 case BCM54XX_COPPER:
2013 /* enable fiber with autonegotiation first */
2014 if (phy->def->ops->enable_fiber)
2015 phy->def->ops->enable_fiber(phy, 1);
2016 card->medium = BCM54XX_FIBER;
2020 /* fiber didn't come up, try to disable fiber autoneg */
2021 if (phy->def->ops->enable_fiber)
2022 phy->def->ops->enable_fiber(phy, 0);
2023 card->medium = BCM54XX_UNKNOWN;
2026 case BCM54XX_UNKNOWN:
2027 /* copper, fiber with and without failed,
2028 * retry from beginning */
2029 spider_net_setup_aneg(card);
2030 card->medium = BCM54XX_COPPER;
2034 card->aneg_count = 0;
2035 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2039 /* link still not up, try again later */
2040 if (!(phy->def->ops->poll_link(phy))) {
2042 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2046 /* link came up, get abilities */
2047 phy->def->ops->read_link(phy);
2049 spider_net_write_reg(card, SPIDER_NET_GMACST,
2050 spider_net_read_reg(card, SPIDER_NET_GMACST));
2051 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
2053 if (phy->speed == 1000)
2054 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
2056 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
2058 card->aneg_count = 0;
2060 pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n",
2061 card->netdev->name, phy->speed,
2062 phy->duplex == 1 ? "Full" : "Half",
2063 phy->autoneg == 1 ? "" : "no ");
2067 * spider_net_setup_phy - setup PHY
2068 * @card: card structure
2070 * returns 0 on success, <0 on failure
2072 * spider_net_setup_phy is used as part of spider_net_probe.
2075 spider_net_setup_phy(struct spider_net_card *card)
2077 struct mii_phy *phy = &card->phy;
2079 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
2080 SPIDER_NET_DMASEL_VALUE);
2081 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
2082 SPIDER_NET_PHY_CTRL_VALUE);
2084 phy->dev = card->netdev;
2085 phy->mdio_read = spider_net_read_phy;
2086 phy->mdio_write = spider_net_write_phy;
2088 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
2090 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
2091 if (id != 0x0000 && id != 0xffff) {
2092 if (!sungem_phy_probe(phy, phy->mii_id)) {
2093 pr_info("Found %s.\n", phy->def->name);
2103 * spider_net_workaround_rxramfull - work around firmware bug
2104 * @card: card structure
2109 spider_net_workaround_rxramfull(struct spider_net_card *card)
2111 int i, sequencer = 0;
2114 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2115 SPIDER_NET_CKRCTRL_RUN_VALUE);
2117 /* empty sequencer data */
2118 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2120 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
2121 sequencer * 8, 0x0);
2122 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
2123 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2124 sequencer * 8, 0x0);
2128 /* set sequencer operation */
2129 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2132 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2133 SPIDER_NET_CKRCTRL_STOP_VALUE);
2137 * spider_net_stop - called upon ifconfig down
2138 * @netdev: interface device structure
2143 spider_net_stop(struct net_device *netdev)
2145 struct spider_net_card *card = netdev_priv(netdev);
2147 napi_disable(&card->napi);
2148 netif_carrier_off(netdev);
2149 netif_stop_queue(netdev);
2150 del_timer_sync(&card->tx_timer);
2151 del_timer_sync(&card->aneg_timer);
2153 spider_net_disable_interrupts(card);
2155 free_irq(netdev->irq, netdev);
2157 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2158 SPIDER_NET_DMA_TX_FEND_VALUE);
2160 /* turn off DMA, force end */
2161 spider_net_disable_rxdmac(card);
2163 /* release chains */
2164 spider_net_release_tx_chain(card, 1);
2165 spider_net_free_rx_chain_contents(card);
2167 spider_net_free_chain(card, &card->tx_chain);
2168 spider_net_free_chain(card, &card->rx_chain);
2174 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2175 * function (to be called not under interrupt status)
2176 * @data: data, is interface device structure
2178 * called as task when tx hangs, resets interface (if interface is up)
2181 spider_net_tx_timeout_task(struct work_struct *work)
2183 struct spider_net_card *card =
2184 container_of(work, struct spider_net_card, tx_timeout_task);
2185 struct net_device *netdev = card->netdev;
2187 if (!(netdev->flags & IFF_UP))
2190 netif_device_detach(netdev);
2191 spider_net_stop(netdev);
2193 spider_net_workaround_rxramfull(card);
2194 spider_net_init_card(card);
2196 if (spider_net_setup_phy(card))
2199 spider_net_open(netdev);
2200 spider_net_kick_tx_dma(card);
2201 netif_device_attach(netdev);
2204 atomic_dec(&card->tx_timeout_task_counter);
2208 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2209 * @netdev: interface device structure
2211 * called, if tx hangs. Schedules a task that resets the interface
2214 spider_net_tx_timeout(struct net_device *netdev)
2216 struct spider_net_card *card;
2218 card = netdev_priv(netdev);
2219 atomic_inc(&card->tx_timeout_task_counter);
2220 if (netdev->flags & IFF_UP)
2221 schedule_work(&card->tx_timeout_task);
2223 atomic_dec(&card->tx_timeout_task_counter);
2224 card->spider_stats.tx_timeouts++;
2227 static const struct net_device_ops spider_net_ops = {
2228 .ndo_open = spider_net_open,
2229 .ndo_stop = spider_net_stop,
2230 .ndo_start_xmit = spider_net_xmit,
2231 .ndo_set_rx_mode = spider_net_set_multi,
2232 .ndo_set_mac_address = spider_net_set_mac,
2233 .ndo_change_mtu = spider_net_change_mtu,
2234 .ndo_do_ioctl = spider_net_do_ioctl,
2235 .ndo_tx_timeout = spider_net_tx_timeout,
2236 .ndo_validate_addr = eth_validate_addr,
2238 #ifdef CONFIG_NET_POLL_CONTROLLER
2239 /* poll controller */
2240 .ndo_poll_controller = spider_net_poll_controller,
2241 #endif /* CONFIG_NET_POLL_CONTROLLER */
2245 * spider_net_setup_netdev_ops - initialization of net_device operations
2246 * @netdev: net_device structure
2248 * fills out function pointers in the net_device structure
2251 spider_net_setup_netdev_ops(struct net_device *netdev)
2253 netdev->netdev_ops = &spider_net_ops;
2254 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2256 netdev->ethtool_ops = &spider_net_ethtool_ops;
2260 * spider_net_setup_netdev - initialization of net_device
2261 * @card: card structure
2263 * Returns 0 on success or <0 on failure
2265 * spider_net_setup_netdev initializes the net_device structure
2268 spider_net_setup_netdev(struct spider_net_card *card)
2271 struct net_device *netdev = card->netdev;
2272 struct device_node *dn;
2273 struct sockaddr addr;
2276 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2278 pci_set_drvdata(card->pdev, netdev);
2280 init_timer(&card->tx_timer);
2281 card->tx_timer.function =
2282 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2283 card->tx_timer.data = (unsigned long) card;
2284 netdev->irq = card->pdev->irq;
2286 card->aneg_count = 0;
2287 init_timer(&card->aneg_timer);
2288 card->aneg_timer.function = spider_net_link_phy;
2289 card->aneg_timer.data = (unsigned long) card;
2291 netif_napi_add(netdev, &card->napi,
2292 spider_net_poll, SPIDER_NET_NAPI_WEIGHT);
2294 spider_net_setup_netdev_ops(netdev);
2296 netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2297 if (SPIDER_NET_RX_CSUM_DEFAULT)
2298 netdev->features |= NETIF_F_RXCSUM;
2299 netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX;
2300 /* some time: NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
2301 * NETIF_F_HW_VLAN_CTAG_FILTER */
2303 netdev->irq = card->pdev->irq;
2304 card->num_rx_ints = 0;
2305 card->ignore_rx_ramfull = 0;
2307 dn = pci_device_to_OF_node(card->pdev);
2311 mac = of_get_property(dn, "local-mac-address", NULL);
2314 memcpy(addr.sa_data, mac, ETH_ALEN);
2316 result = spider_net_set_mac(netdev, &addr);
2317 if ((result) && (netif_msg_probe(card)))
2318 dev_err(&card->netdev->dev,
2319 "Failed to set MAC address: %i\n", result);
2321 result = register_netdev(netdev);
2323 if (netif_msg_probe(card))
2324 dev_err(&card->netdev->dev,
2325 "Couldn't register net_device: %i\n", result);
2329 if (netif_msg_probe(card))
2330 pr_info("Initialized device %s.\n", netdev->name);
2336 * spider_net_alloc_card - allocates net_device and card structure
2338 * returns the card structure or NULL in case of errors
2340 * the card and net_device structures are linked to each other
2342 static struct spider_net_card *
2343 spider_net_alloc_card(void)
2345 struct net_device *netdev;
2346 struct spider_net_card *card;
2349 alloc_size = sizeof(struct spider_net_card) +
2350 (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr);
2351 netdev = alloc_etherdev(alloc_size);
2355 card = netdev_priv(netdev);
2356 card->netdev = netdev;
2357 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2358 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
2359 init_waitqueue_head(&card->waitq);
2360 atomic_set(&card->tx_timeout_task_counter, 0);
2362 card->rx_chain.num_desc = rx_descriptors;
2363 card->rx_chain.ring = card->darray;
2364 card->tx_chain.num_desc = tx_descriptors;
2365 card->tx_chain.ring = card->darray + rx_descriptors;
2371 * spider_net_undo_pci_setup - releases PCI ressources
2372 * @card: card structure
2374 * spider_net_undo_pci_setup releases the mapped regions
2377 spider_net_undo_pci_setup(struct spider_net_card *card)
2379 iounmap(card->regs);
2380 pci_release_regions(card->pdev);
2384 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2387 * Returns the card structure or NULL if any errors occur
2389 * spider_net_setup_pci_dev initializes pdev and together with the
2390 * functions called in spider_net_open configures the device so that
2391 * data can be transferred over it
2392 * The net_device structure is attached to the card structure, if the
2393 * function returns without error.
2395 static struct spider_net_card *
2396 spider_net_setup_pci_dev(struct pci_dev *pdev)
2398 struct spider_net_card *card;
2399 unsigned long mmio_start, mmio_len;
2401 if (pci_enable_device(pdev)) {
2402 dev_err(&pdev->dev, "Couldn't enable PCI device\n");
2406 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2408 "Couldn't find proper PCI device base address.\n");
2409 goto out_disable_dev;
2412 if (pci_request_regions(pdev, spider_net_driver_name)) {
2414 "Couldn't obtain PCI resources, aborting.\n");
2415 goto out_disable_dev;
2418 pci_set_master(pdev);
2420 card = spider_net_alloc_card();
2423 "Couldn't allocate net_device structure, aborting.\n");
2424 goto out_release_regions;
2428 /* fetch base address and length of first resource */
2429 mmio_start = pci_resource_start(pdev, 0);
2430 mmio_len = pci_resource_len(pdev, 0);
2432 card->netdev->mem_start = mmio_start;
2433 card->netdev->mem_end = mmio_start + mmio_len;
2434 card->regs = ioremap(mmio_start, mmio_len);
2438 "Couldn't obtain PCI resources, aborting.\n");
2439 goto out_release_regions;
2444 out_release_regions:
2445 pci_release_regions(pdev);
2447 pci_disable_device(pdev);
2452 * spider_net_probe - initialization of a device
2454 * @ent: entry in the device id list
2456 * Returns 0 on success, <0 on failure
2458 * spider_net_probe initializes pdev and registers a net_device
2459 * structure for it. After that, the device can be ifconfig'ed up
2462 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2465 struct spider_net_card *card;
2467 card = spider_net_setup_pci_dev(pdev);
2471 spider_net_workaround_rxramfull(card);
2472 spider_net_init_card(card);
2474 err = spider_net_setup_phy(card);
2478 err = spider_net_setup_netdev(card);
2485 spider_net_undo_pci_setup(card);
2486 free_netdev(card->netdev);
2492 * spider_net_remove - removal of a device
2495 * Returns 0 on success, <0 on failure
2497 * spider_net_remove is called to remove the device and unregisters the
2501 spider_net_remove(struct pci_dev *pdev)
2503 struct net_device *netdev;
2504 struct spider_net_card *card;
2506 netdev = pci_get_drvdata(pdev);
2507 card = netdev_priv(netdev);
2509 wait_event(card->waitq,
2510 atomic_read(&card->tx_timeout_task_counter) == 0);
2512 unregister_netdev(netdev);
2514 /* switch off card */
2515 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2516 SPIDER_NET_CKRCTRL_STOP_VALUE);
2517 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2518 SPIDER_NET_CKRCTRL_RUN_VALUE);
2520 spider_net_undo_pci_setup(card);
2521 free_netdev(netdev);
2524 static struct pci_driver spider_net_driver = {
2525 .name = spider_net_driver_name,
2526 .id_table = spider_net_pci_tbl,
2527 .probe = spider_net_probe,
2528 .remove = spider_net_remove
2532 * spider_net_init - init function when the driver is loaded
2534 * spider_net_init registers the device driver
2536 static int __init spider_net_init(void)
2538 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2540 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2541 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2542 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2544 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2545 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2546 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2548 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2549 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2550 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2552 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2553 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2554 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2557 return pci_register_driver(&spider_net_driver);
2561 * spider_net_cleanup - exit function when driver is unloaded
2563 * spider_net_cleanup unregisters the device driver
2565 static void __exit spider_net_cleanup(void)
2567 pci_unregister_driver(&spider_net_driver);
2570 module_init(spider_net_init);
2571 module_exit(spider_net_cleanup);