2 * Network device driver for Cell Processor-Based Blade and Celleb platform
4 * (C) Copyright IBM Corp. 2005
5 * (C) Copyright 2006 TOSHIBA CORPORATION
7 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
8 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <linux/compiler.h>
26 #include <linux/crc32.h>
27 #include <linux/delay.h>
28 #include <linux/etherdevice.h>
29 #include <linux/ethtool.h>
30 #include <linux/firmware.h>
31 #include <linux/if_vlan.h>
33 #include <linux/init.h>
34 #include <linux/ioport.h>
36 #include <linux/kernel.h>
37 #include <linux/mii.h>
38 #include <linux/module.h>
39 #include <linux/netdevice.h>
40 #include <linux/device.h>
41 #include <linux/pci.h>
42 #include <linux/skbuff.h>
43 #include <linux/slab.h>
44 #include <linux/tcp.h>
45 #include <linux/types.h>
46 #include <linux/vmalloc.h>
47 #include <linux/wait.h>
48 #include <linux/workqueue.h>
49 #include <asm/bitops.h>
50 #include <asm/pci-bridge.h>
51 #include <net/checksum.h>
53 #include "spider_net.h"
55 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
56 "<Jens.Osterkamp@de.ibm.com>");
57 MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
58 MODULE_LICENSE("GPL");
59 MODULE_VERSION(VERSION);
61 static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
62 static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
64 module_param(rx_descriptors, int, 0444);
65 module_param(tx_descriptors, int, 0444);
67 MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
69 MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
72 char spider_net_driver_name[] = "spidernet";
74 static struct pci_device_id spider_net_pci_tbl[] = {
75 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
76 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
80 MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
83 * spider_net_read_reg - reads an SMMIO register of a card
84 * @card: device structure
85 * @reg: register to read from
87 * returns the content of the specified SMMIO register.
90 spider_net_read_reg(struct spider_net_card *card, u32 reg)
92 /* We use the powerpc specific variants instead of readl_be() because
93 * we know spidernet is not a real PCI device and we can thus avoid the
94 * performance hit caused by the PCI workarounds.
96 return in_be32(card->regs + reg);
100 * spider_net_write_reg - writes to an SMMIO register of a card
101 * @card: device structure
102 * @reg: register to write to
103 * @value: value to write into the specified SMMIO register
106 spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
108 /* We use the powerpc specific variants instead of writel_be() because
109 * we know spidernet is not a real PCI device and we can thus avoid the
110 * performance hit caused by the PCI workarounds.
112 out_be32(card->regs + reg, value);
115 /** spider_net_write_phy - write to phy register
116 * @netdev: adapter to be written to
119 * @val: value to be written to phy register
121 * spider_net_write_phy_register writes to an arbitrary PHY
122 * register via the spider GPCWOPCMD register. We assume the queue does
123 * not run full (not more than 15 commands outstanding).
126 spider_net_write_phy(struct net_device *netdev, int mii_id,
129 struct spider_net_card *card = netdev_priv(netdev);
132 writevalue = ((u32)mii_id << 21) |
133 ((u32)reg << 16) | ((u32)val);
135 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
138 /** spider_net_read_phy - read from phy register
139 * @netdev: network device to be read from
143 * Returns value read from PHY register
145 * spider_net_write_phy reads from an arbitrary PHY
146 * register via the spider GPCROPCMD register
149 spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
151 struct spider_net_card *card = netdev_priv(netdev);
154 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
155 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
157 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
158 * interrupt, as we poll for the completion of the read operation
159 * in spider_net_read_phy. Should take about 50 us */
161 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
162 } while (readvalue & SPIDER_NET_GPREXEC);
164 readvalue &= SPIDER_NET_GPRDAT_MASK;
170 * spider_net_setup_aneg - initial auto-negotiation setup
171 * @card: device structure
174 spider_net_setup_aneg(struct spider_net_card *card)
176 struct mii_phy *phy = &card->phy;
180 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
181 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
183 if (bmsr & BMSR_10HALF)
184 advertise |= ADVERTISED_10baseT_Half;
185 if (bmsr & BMSR_10FULL)
186 advertise |= ADVERTISED_10baseT_Full;
187 if (bmsr & BMSR_100HALF)
188 advertise |= ADVERTISED_100baseT_Half;
189 if (bmsr & BMSR_100FULL)
190 advertise |= ADVERTISED_100baseT_Full;
192 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
193 advertise |= SUPPORTED_1000baseT_Full;
194 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
195 advertise |= SUPPORTED_1000baseT_Half;
197 mii_phy_probe(phy, phy->mii_id);
198 phy->def->ops->setup_aneg(phy, advertise);
203 * spider_net_rx_irq_off - switch off rx irq on this spider card
204 * @card: device structure
206 * switches off rx irq by masking them out in the GHIINTnMSK register
209 spider_net_rx_irq_off(struct spider_net_card *card)
213 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
214 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
218 * spider_net_rx_irq_on - switch on rx irq on this spider card
219 * @card: device structure
221 * switches on rx irq by enabling them in the GHIINTnMSK register
224 spider_net_rx_irq_on(struct spider_net_card *card)
228 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
229 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
233 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
234 * @card: card structure
236 * spider_net_set_promisc sets the unicast destination address filter and
237 * thus either allows for non-promisc mode or promisc mode
240 spider_net_set_promisc(struct spider_net_card *card)
243 struct net_device *netdev = card->netdev;
245 if (netdev->flags & IFF_PROMISC) {
246 /* clear destination entry 0 */
247 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
248 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
249 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
250 SPIDER_NET_PROMISC_VALUE);
252 macu = netdev->dev_addr[0];
254 macu |= netdev->dev_addr[1];
255 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
257 macu |= SPIDER_NET_UA_DESCR_VALUE;
258 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
259 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
260 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
261 SPIDER_NET_NONPROMISC_VALUE);
266 * spider_net_get_mac_address - read mac address from spider card
267 * @card: device structure
269 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
272 spider_net_get_mac_address(struct net_device *netdev)
274 struct spider_net_card *card = netdev_priv(netdev);
277 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
278 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
280 netdev->dev_addr[0] = (macu >> 24) & 0xff;
281 netdev->dev_addr[1] = (macu >> 16) & 0xff;
282 netdev->dev_addr[2] = (macu >> 8) & 0xff;
283 netdev->dev_addr[3] = macu & 0xff;
284 netdev->dev_addr[4] = (macl >> 8) & 0xff;
285 netdev->dev_addr[5] = macl & 0xff;
287 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
294 * spider_net_get_descr_status -- returns the status of a descriptor
295 * @descr: descriptor to look at
297 * returns the status as in the dmac_cmd_status field of the descriptor
300 spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
302 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
306 * spider_net_free_chain - free descriptor chain
307 * @card: card structure
308 * @chain: address of chain
312 spider_net_free_chain(struct spider_net_card *card,
313 struct spider_net_descr_chain *chain)
315 struct spider_net_descr *descr;
320 descr->hwdescr->next_descr_addr = 0;
322 } while (descr != chain->ring);
324 dma_free_coherent(&card->pdev->dev, chain->num_desc,
325 chain->hwring, chain->dma_addr);
329 * spider_net_init_chain - alloc and link descriptor chain
330 * @card: card structure
331 * @chain: address of chain
333 * We manage a circular list that mirrors the hardware structure,
334 * except that the hardware uses bus addresses.
336 * Returns 0 on success, <0 on failure
339 spider_net_init_chain(struct spider_net_card *card,
340 struct spider_net_descr_chain *chain)
343 struct spider_net_descr *descr;
344 struct spider_net_hw_descr *hwdescr;
348 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
350 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
351 &chain->dma_addr, GFP_KERNEL);
356 memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr));
358 /* Set up the hardware pointers in each descriptor */
360 hwdescr = chain->hwring;
361 buf = chain->dma_addr;
362 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
363 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
364 hwdescr->next_descr_addr = 0;
366 descr->hwdescr = hwdescr;
367 descr->bus_addr = buf;
368 descr->next = descr + 1;
369 descr->prev = descr - 1;
371 buf += sizeof(struct spider_net_hw_descr);
373 /* do actual circular list */
374 (descr-1)->next = chain->ring;
375 chain->ring->prev = descr-1;
377 spin_lock_init(&chain->lock);
378 chain->head = chain->ring;
379 chain->tail = chain->ring;
384 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
385 * @card: card structure
387 * returns 0 on success, <0 on failure
390 spider_net_free_rx_chain_contents(struct spider_net_card *card)
392 struct spider_net_descr *descr;
394 descr = card->rx_chain.head;
397 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
398 SPIDER_NET_MAX_FRAME,
399 PCI_DMA_BIDIRECTIONAL);
400 dev_kfree_skb(descr->skb);
404 } while (descr != card->rx_chain.head);
408 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
409 * @card: card structure
410 * @descr: descriptor to re-init
412 * Return 0 on succes, <0 on failure.
414 * Allocates a new rx skb, iommu-maps it and attaches it to the
415 * descriptor. Mark the descriptor as activated, ready-to-use.
418 spider_net_prepare_rx_descr(struct spider_net_card *card,
419 struct spider_net_descr *descr)
421 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
426 /* we need to round up the buffer size to a multiple of 128 */
427 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
428 (~(SPIDER_NET_RXBUF_ALIGN - 1));
430 /* and we need to have it 128 byte aligned, therefore we allocate a
432 /* allocate an skb */
433 descr->skb = netdev_alloc_skb(card->netdev,
434 bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
436 if (netif_msg_rx_err(card) && net_ratelimit())
437 dev_err(&card->netdev->dev,
438 "Not enough memory to allocate rx buffer\n");
439 card->spider_stats.alloc_rx_skb_error++;
442 hwdescr->buf_size = bufsize;
443 hwdescr->result_size = 0;
444 hwdescr->valid_size = 0;
445 hwdescr->data_status = 0;
446 hwdescr->data_error = 0;
448 offset = ((unsigned long)descr->skb->data) &
449 (SPIDER_NET_RXBUF_ALIGN - 1);
451 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
452 /* iommu-map the skb */
453 buf = pci_map_single(card->pdev, descr->skb->data,
454 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
455 if (pci_dma_mapping_error(buf)) {
456 dev_kfree_skb_any(descr->skb);
458 if (netif_msg_rx_err(card) && net_ratelimit())
459 dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n");
460 card->spider_stats.rx_iommu_map_error++;
461 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
463 hwdescr->buf_addr = buf;
465 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
466 SPIDER_NET_DMAC_NOINTR_COMPLETE;
473 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
474 * @card: card structure
476 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
477 * chip by writing to the appropriate register. DMA is enabled in
478 * spider_net_enable_rxdmac.
481 spider_net_enable_rxchtails(struct spider_net_card *card)
483 /* assume chain is aligned correctly */
484 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
485 card->rx_chain.tail->bus_addr);
489 * spider_net_enable_rxdmac - enables a receive DMA controller
490 * @card: card structure
492 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
493 * in the GDADMACCNTR register
496 spider_net_enable_rxdmac(struct spider_net_card *card)
499 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
500 SPIDER_NET_DMA_RX_VALUE);
504 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
505 * @card: card structure
507 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
510 spider_net_refill_rx_chain(struct spider_net_card *card)
512 struct spider_net_descr_chain *chain = &card->rx_chain;
515 /* one context doing the refill (and a second context seeing that
516 * and omitting it) is ok. If called by NAPI, we'll be called again
517 * as spider_net_decode_one_descr is called several times. If some
518 * interrupt calls us, the NAPI is about to clean up anyway. */
519 if (!spin_trylock_irqsave(&chain->lock, flags))
522 while (spider_net_get_descr_status(chain->head->hwdescr) ==
523 SPIDER_NET_DESCR_NOT_IN_USE) {
524 if (spider_net_prepare_rx_descr(card, chain->head))
526 chain->head = chain->head->next;
529 spin_unlock_irqrestore(&chain->lock, flags);
533 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
534 * @card: card structure
536 * Returns 0 on success, <0 on failure.
539 spider_net_alloc_rx_skbs(struct spider_net_card *card)
541 struct spider_net_descr_chain *chain = &card->rx_chain;
542 struct spider_net_descr *start = chain->tail;
543 struct spider_net_descr *descr = start;
545 /* Link up the hardware chain pointers */
547 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
549 } while (descr != start);
551 /* Put at least one buffer into the chain. if this fails,
552 * we've got a problem. If not, spider_net_refill_rx_chain
553 * will do the rest at the end of this function. */
554 if (spider_net_prepare_rx_descr(card, chain->head))
557 chain->head = chain->head->next;
559 /* This will allocate the rest of the rx buffers;
560 * if not, it's business as usual later on. */
561 spider_net_refill_rx_chain(card);
562 spider_net_enable_rxdmac(card);
566 spider_net_free_rx_chain_contents(card);
571 * spider_net_get_multicast_hash - generates hash for multicast filter table
572 * @addr: multicast address
574 * returns the hash value.
576 * spider_net_get_multicast_hash calculates a hash value for a given multicast
577 * address, that is used to set the multicast filter tables
580 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
584 char addr_for_crc[ETH_ALEN] = { 0, };
587 for (i = 0; i < ETH_ALEN * 8; i++) {
588 bit = (addr[i / 8] >> (i % 8)) & 1;
589 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
592 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
603 * spider_net_set_multi - sets multicast addresses and promisc flags
604 * @netdev: interface device structure
606 * spider_net_set_multi configures multicast addresses as needed for the
607 * netdev interface. It also sets up multicast, allmulti and promisc
608 * flags appropriately
611 spider_net_set_multi(struct net_device *netdev)
613 struct dev_mc_list *mc;
617 struct spider_net_card *card = netdev_priv(netdev);
618 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
621 spider_net_set_promisc(card);
623 if (netdev->flags & IFF_ALLMULTI) {
624 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
630 /* well, we know, what the broadcast hash value is: it's xfd
631 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
632 set_bit(0xfd, bitmask);
634 for (mc = netdev->mc_list; mc; mc = mc->next) {
635 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
636 set_bit(hash, bitmask);
640 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
642 if (test_bit(i * 4, bitmask))
645 if (test_bit(i * 4 + 1, bitmask))
648 if (test_bit(i * 4 + 2, bitmask))
651 if (test_bit(i * 4 + 3, bitmask))
654 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
659 * spider_net_disable_rxdmac - disables the receive DMA controller
660 * @card: card structure
662 * spider_net_disable_rxdmac terminates processing on the DMA controller by
663 * turing off DMA and issueing a force end
666 spider_net_disable_rxdmac(struct spider_net_card *card)
668 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
669 SPIDER_NET_DMA_RX_FEND_VALUE);
673 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
674 * @card: card structure
675 * @descr: descriptor structure to fill out
676 * @skb: packet to use
678 * returns 0 on success, <0 on failure.
680 * fills out the descriptor structure with skb data and len. Copies data,
681 * if needed (32bit DMA!)
684 spider_net_prepare_tx_descr(struct spider_net_card *card,
687 struct spider_net_descr_chain *chain = &card->tx_chain;
688 struct spider_net_descr *descr;
689 struct spider_net_hw_descr *hwdescr;
693 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
694 if (pci_dma_mapping_error(buf)) {
695 if (netif_msg_tx_err(card) && net_ratelimit())
696 dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). "
697 "Dropping packet\n", skb->data, skb->len);
698 card->spider_stats.tx_iommu_map_error++;
702 spin_lock_irqsave(&chain->lock, flags);
703 descr = card->tx_chain.head;
704 if (descr->next == chain->tail->prev) {
705 spin_unlock_irqrestore(&chain->lock, flags);
706 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
709 hwdescr = descr->hwdescr;
710 chain->head = descr->next;
713 hwdescr->buf_addr = buf;
714 hwdescr->buf_size = skb->len;
715 hwdescr->next_descr_addr = 0;
716 hwdescr->data_status = 0;
718 hwdescr->dmac_cmd_status =
719 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
720 spin_unlock_irqrestore(&chain->lock, flags);
722 if (skb->ip_summed == CHECKSUM_PARTIAL)
723 switch (ip_hdr(skb)->protocol) {
725 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
728 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
732 /* Chain the bus address, so that the DMA engine finds this descr. */
734 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
736 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
741 spider_net_set_low_watermark(struct spider_net_card *card)
743 struct spider_net_descr *descr = card->tx_chain.tail;
744 struct spider_net_hw_descr *hwdescr;
750 /* Measure the length of the queue. Measurement does not
751 * need to be precise -- does not need a lock. */
752 while (descr != card->tx_chain.head) {
753 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
754 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
760 /* If TX queue is short, don't even bother with interrupts */
761 if (cnt < card->tx_chain.num_desc/4)
764 /* Set low-watermark 3/4th's of the way into the queue. */
765 descr = card->tx_chain.tail;
770 /* Set the new watermark, clear the old watermark */
771 spin_lock_irqsave(&card->tx_chain.lock, flags);
772 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
773 if (card->low_watermark && card->low_watermark != descr) {
774 hwdescr = card->low_watermark->hwdescr;
775 hwdescr->dmac_cmd_status =
776 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
778 card->low_watermark = descr;
779 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
784 * spider_net_release_tx_chain - processes sent tx descriptors
785 * @card: adapter structure
786 * @brutal: if set, don't care about whether descriptor seems to be in use
788 * returns 0 if the tx ring is empty, otherwise 1.
790 * spider_net_release_tx_chain releases the tx descriptors that spider has
791 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
792 * If some other context is calling this function, we return 1 so that we're
793 * scheduled again (if we were scheduled) and will not loose initiative.
796 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
798 struct spider_net_descr_chain *chain = &card->tx_chain;
799 struct spider_net_descr *descr;
800 struct spider_net_hw_descr *hwdescr;
807 spin_lock_irqsave(&chain->lock, flags);
808 if (chain->tail == chain->head) {
809 spin_unlock_irqrestore(&chain->lock, flags);
813 hwdescr = descr->hwdescr;
815 status = spider_net_get_descr_status(hwdescr);
817 case SPIDER_NET_DESCR_COMPLETE:
818 card->netdev_stats.tx_packets++;
819 card->netdev_stats.tx_bytes += descr->skb->len;
822 case SPIDER_NET_DESCR_CARDOWNED:
824 spin_unlock_irqrestore(&chain->lock, flags);
828 /* fallthrough, if we release the descriptors
829 * brutally (then we don't care about
830 * SPIDER_NET_DESCR_CARDOWNED) */
832 case SPIDER_NET_DESCR_RESPONSE_ERROR:
833 case SPIDER_NET_DESCR_PROTECTION_ERROR:
834 case SPIDER_NET_DESCR_FORCE_END:
835 if (netif_msg_tx_err(card))
836 dev_err(&card->netdev->dev, "forcing end of tx descriptor "
837 "with status x%02x\n", status);
838 card->netdev_stats.tx_errors++;
842 card->netdev_stats.tx_dropped++;
844 spin_unlock_irqrestore(&chain->lock, flags);
849 chain->tail = descr->next;
850 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
853 buf_addr = hwdescr->buf_addr;
854 spin_unlock_irqrestore(&chain->lock, flags);
858 pci_unmap_single(card->pdev, buf_addr, skb->len,
867 * spider_net_kick_tx_dma - enables TX DMA processing
868 * @card: card structure
869 * @descr: descriptor address to enable TX processing at
871 * This routine will start the transmit DMA running if
872 * it is not already running. This routine ned only be
873 * called when queueing a new packet to an empty tx queue.
874 * Writes the current tx chain head as start address
875 * of the tx descriptor chain and enables the transmission
879 spider_net_kick_tx_dma(struct spider_net_card *card)
881 struct spider_net_descr *descr;
883 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
884 SPIDER_NET_TX_DMA_EN)
887 descr = card->tx_chain.tail;
889 if (spider_net_get_descr_status(descr->hwdescr) ==
890 SPIDER_NET_DESCR_CARDOWNED) {
891 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
893 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
894 SPIDER_NET_DMA_TX_VALUE);
897 if (descr == card->tx_chain.head)
903 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
907 * spider_net_xmit - transmits a frame over the device
908 * @skb: packet to send out
909 * @netdev: interface device structure
911 * returns 0 on success, !0 on failure
914 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
917 struct spider_net_card *card = netdev_priv(netdev);
919 spider_net_release_tx_chain(card, 0);
921 if (spider_net_prepare_tx_descr(card, skb) != 0) {
922 card->netdev_stats.tx_dropped++;
923 netif_stop_queue(netdev);
924 return NETDEV_TX_BUSY;
927 cnt = spider_net_set_low_watermark(card);
929 spider_net_kick_tx_dma(card);
934 * spider_net_cleanup_tx_ring - cleans up the TX ring
935 * @card: card structure
937 * spider_net_cleanup_tx_ring is called by either the tx_timer
938 * or from the NAPI polling routine.
939 * This routine releases resources associted with transmitted
940 * packets, including updating the queue tail pointer.
943 spider_net_cleanup_tx_ring(struct spider_net_card *card)
945 if ((spider_net_release_tx_chain(card, 0) != 0) &&
946 (card->netdev->flags & IFF_UP)) {
947 spider_net_kick_tx_dma(card);
948 netif_wake_queue(card->netdev);
953 * spider_net_do_ioctl - called for device ioctls
954 * @netdev: interface device structure
955 * @ifr: request parameter structure for ioctl
956 * @cmd: command code for ioctl
958 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
959 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
962 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
971 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
972 * @descr: descriptor to process
973 * @card: card structure
975 * Fills out skb structure and passes the data to the stack.
976 * The descriptor state is not changed.
979 spider_net_pass_skb_up(struct spider_net_descr *descr,
980 struct spider_net_card *card)
982 struct spider_net_hw_descr *hwdescr= descr->hwdescr;
984 struct net_device *netdev;
985 u32 data_status, data_error;
987 data_status = hwdescr->data_status;
988 data_error = hwdescr->data_error;
989 netdev = card->netdev;
992 skb_put(skb, hwdescr->valid_size);
994 /* the card seems to add 2 bytes of junk in front
995 * of the ethernet frame */
996 #define SPIDER_MISALIGN 2
997 skb_pull(skb, SPIDER_MISALIGN);
998 skb->protocol = eth_type_trans(skb, netdev);
1000 /* checksum offload */
1001 if (card->options.rx_csum) {
1002 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
1003 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
1004 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
1005 skb->ip_summed = CHECKSUM_UNNECESSARY;
1007 skb->ip_summed = CHECKSUM_NONE;
1009 skb->ip_summed = CHECKSUM_NONE;
1011 if (data_status & SPIDER_NET_VLAN_PACKET) {
1012 /* further enhancements: HW-accel VLAN
1013 * vlan_hwaccel_receive_skb
1017 /* update netdevice statistics */
1018 card->netdev_stats.rx_packets++;
1019 card->netdev_stats.rx_bytes += skb->len;
1021 /* pass skb up to stack */
1022 netif_receive_skb(skb);
1025 static void show_rx_chain(struct spider_net_card *card)
1027 struct spider_net_descr_chain *chain = &card->rx_chain;
1028 struct spider_net_descr *start= chain->tail;
1029 struct spider_net_descr *descr= start;
1030 struct spider_net_hw_descr *hwd = start->hwdescr;
1031 struct device *dev = &card->netdev->dev;
1032 u32 curr_desc, next_desc;
1037 int off = start - chain->ring;
1038 int cstat = hwd->dmac_cmd_status;
1040 dev_info(dev, "Total number of descrs=%d\n",
1042 dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n",
1045 curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA);
1046 next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA);
1051 hwd = descr->hwdescr;
1052 off = descr - chain->ring;
1053 status = hwd->dmac_cmd_status;
1055 if (descr == chain->head)
1056 dev_info(dev, "Chain head is at %d, head status=0x%x\n",
1059 if (curr_desc == descr->bus_addr)
1060 dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n",
1063 if (next_desc == descr->bus_addr)
1064 dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n",
1067 if (hwd->next_descr_addr == 0)
1068 dev_info(dev, "chain is cut at %d\n", off);
1070 if (cstat != status) {
1071 int from = (chain->num_desc + off - cnt) % chain->num_desc;
1072 int to = (chain->num_desc + off - 1) % chain->num_desc;
1073 dev_info(dev, "Have %d (from %d to %d) descrs "
1074 "with stat=0x%08x\n", cnt, from, to, cstat);
1081 descr = descr->next;
1082 } while (descr != start);
1084 dev_info(dev, "Last %d descrs with stat=0x%08x "
1085 "for a total of %d descrs\n", cnt, cstat, tot);
1088 /* Now dump the whole ring */
1092 struct spider_net_hw_descr *hwd = descr->hwdescr;
1093 status = spider_net_get_descr_status(hwd);
1094 cnt = descr - chain->ring;
1095 dev_info(dev, "Descr %d stat=0x%08x skb=%p\n",
1096 cnt, status, descr->skb);
1097 dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n",
1098 descr->bus_addr, hwd->buf_addr, hwd->buf_size);
1099 dev_info(dev, "next=%08x result sz=%d valid sz=%d\n",
1100 hwd->next_descr_addr, hwd->result_size,
1102 dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n",
1103 hwd->dmac_cmd_status, hwd->data_status,
1105 dev_info(dev, "\n");
1107 descr = descr->next;
1108 } while (descr != start);
1114 * spider_net_resync_head_ptr - Advance head ptr past empty descrs
1116 * If the driver fails to keep up and empty the queue, then the
1117 * hardware wil run out of room to put incoming packets. This
1118 * will cause the hardware to skip descrs that are full (instead
1119 * of halting/retrying). Thus, once the driver runs, it wil need
1120 * to "catch up" to where the hardware chain pointer is at.
1122 static void spider_net_resync_head_ptr(struct spider_net_card *card)
1124 unsigned long flags;
1125 struct spider_net_descr_chain *chain = &card->rx_chain;
1126 struct spider_net_descr *descr;
1129 /* Advance head pointer past any empty descrs */
1130 descr = chain->head;
1131 status = spider_net_get_descr_status(descr->hwdescr);
1133 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
1136 spin_lock_irqsave(&chain->lock, flags);
1138 descr = chain->head;
1139 status = spider_net_get_descr_status(descr->hwdescr);
1140 for (i=0; i<chain->num_desc; i++) {
1141 if (status != SPIDER_NET_DESCR_CARDOWNED) break;
1142 descr = descr->next;
1143 status = spider_net_get_descr_status(descr->hwdescr);
1145 chain->head = descr;
1147 spin_unlock_irqrestore(&chain->lock, flags);
1150 static int spider_net_resync_tail_ptr(struct spider_net_card *card)
1152 struct spider_net_descr_chain *chain = &card->rx_chain;
1153 struct spider_net_descr *descr;
1156 /* Advance tail pointer past any empty and reaped descrs */
1157 descr = chain->tail;
1158 status = spider_net_get_descr_status(descr->hwdescr);
1160 for (i=0; i<chain->num_desc; i++) {
1161 if ((status != SPIDER_NET_DESCR_CARDOWNED) &&
1162 (status != SPIDER_NET_DESCR_NOT_IN_USE)) break;
1163 descr = descr->next;
1164 status = spider_net_get_descr_status(descr->hwdescr);
1166 chain->tail = descr;
1168 if ((i == chain->num_desc) || (i == 0))
1174 * spider_net_decode_one_descr - processes an RX descriptor
1175 * @card: card structure
1177 * Returns 1 if a packet has been sent to the stack, otherwise 0.
1179 * Processes an RX descriptor by iommu-unmapping the data buffer
1180 * and passing the packet up to the stack. This function is called
1181 * in softirq context, e.g. either bottom half from interrupt or
1182 * NAPI polling context.
1185 spider_net_decode_one_descr(struct spider_net_card *card)
1187 struct spider_net_descr_chain *chain = &card->rx_chain;
1188 struct spider_net_descr *descr = chain->tail;
1189 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
1192 status = spider_net_get_descr_status(hwdescr);
1194 /* Nothing in the descriptor, or ring must be empty */
1195 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1196 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1199 /* descriptor definitively used -- move on tail */
1200 chain->tail = descr->next;
1202 /* unmap descriptor */
1203 pci_unmap_single(card->pdev, hwdescr->buf_addr,
1204 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1206 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1207 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1208 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1209 if (netif_msg_rx_err(card))
1210 dev_err(&card->netdev->dev,
1211 "dropping RX descriptor with state %d\n", status);
1212 card->netdev_stats.rx_dropped++;
1216 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1217 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1218 if (netif_msg_rx_err(card))
1219 dev_err(&card->netdev->dev,
1220 "RX descriptor with unknown state %d\n", status);
1221 card->spider_stats.rx_desc_unk_state++;
1225 /* The cases we'll throw away the packet immediately */
1226 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
1227 if (netif_msg_rx_err(card))
1228 dev_err(&card->netdev->dev,
1229 "error in received descriptor found, "
1230 "data_status=x%08x, data_error=x%08x\n",
1231 hwdescr->data_status, hwdescr->data_error);
1235 if (hwdescr->dmac_cmd_status & 0xfcf4) {
1236 dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n",
1237 hwdescr->dmac_cmd_status);
1238 pr_err("buf_addr=x%08x\n", hwdescr->buf_addr);
1239 pr_err("buf_size=x%08x\n", hwdescr->buf_size);
1240 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
1241 pr_err("result_size=x%08x\n", hwdescr->result_size);
1242 pr_err("valid_size=x%08x\n", hwdescr->valid_size);
1243 pr_err("data_status=x%08x\n", hwdescr->data_status);
1244 pr_err("data_error=x%08x\n", hwdescr->data_error);
1245 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1247 card->spider_stats.rx_desc_error++;
1251 /* Ok, we've got a packet in descr */
1252 spider_net_pass_skb_up(descr, card);
1254 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1258 if (netif_msg_rx_err(card))
1259 show_rx_chain(card);
1260 dev_kfree_skb_irq(descr->skb);
1262 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1267 * spider_net_poll - NAPI poll function called by the stack to return packets
1268 * @netdev: interface device structure
1269 * @budget: number of packets we can pass to the stack at most
1271 * returns 0 if no more packets available to the driver/stack. Returns 1,
1272 * if the quota is exceeded, but the driver has still packets.
1274 * spider_net_poll returns all packets from the rx descriptors to the stack
1275 * (using netif_receive_skb). If all/enough packets are up, the driver
1276 * reenables interrupts and returns 0. If not, 1 is returned.
1279 spider_net_poll(struct net_device *netdev, int *budget)
1281 struct spider_net_card *card = netdev_priv(netdev);
1282 int packets_to_do, packets_done = 0;
1283 int no_more_packets = 0;
1285 spider_net_cleanup_tx_ring(card);
1286 packets_to_do = min(*budget, netdev->quota);
1288 while (packets_to_do) {
1289 if (spider_net_decode_one_descr(card)) {
1293 /* no more packets for the stack */
1294 no_more_packets = 1;
1299 if ((packets_done == 0) && (card->num_rx_ints != 0)) {
1300 no_more_packets = spider_net_resync_tail_ptr(card);
1301 spider_net_resync_head_ptr(card);
1303 card->num_rx_ints = 0;
1305 netdev->quota -= packets_done;
1306 *budget -= packets_done;
1307 spider_net_refill_rx_chain(card);
1308 spider_net_enable_rxdmac(card);
1310 /* if all packets are in the stack, enable interrupts and return 0 */
1311 /* if not, return 1 */
1312 if (no_more_packets) {
1313 netif_rx_complete(netdev);
1314 spider_net_rx_irq_on(card);
1315 card->ignore_rx_ramfull = 0;
1323 * spider_net_get_stats - get interface statistics
1324 * @netdev: interface device structure
1326 * returns the interface statistics residing in the spider_net_card struct
1328 static struct net_device_stats *
1329 spider_net_get_stats(struct net_device *netdev)
1331 struct spider_net_card *card = netdev_priv(netdev);
1332 struct net_device_stats *stats = &card->netdev_stats;
1337 * spider_net_change_mtu - changes the MTU of an interface
1338 * @netdev: interface device structure
1339 * @new_mtu: new MTU value
1341 * returns 0 on success, <0 on failure
1344 spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1346 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1347 * and mtu is outbound only anyway */
1348 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1349 (new_mtu > SPIDER_NET_MAX_MTU) )
1351 netdev->mtu = new_mtu;
1356 * spider_net_set_mac - sets the MAC of an interface
1357 * @netdev: interface device structure
1358 * @ptr: pointer to new MAC address
1360 * Returns 0 on success, <0 on failure. Currently, we don't support this
1361 * and will always return EOPNOTSUPP.
1364 spider_net_set_mac(struct net_device *netdev, void *p)
1366 struct spider_net_card *card = netdev_priv(netdev);
1367 u32 macl, macu, regvalue;
1368 struct sockaddr *addr = p;
1370 if (!is_valid_ether_addr(addr->sa_data))
1371 return -EADDRNOTAVAIL;
1373 /* switch off GMACTPE and GMACRPE */
1374 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1375 regvalue &= ~((1 << 5) | (1 << 6));
1376 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1379 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1380 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1381 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1382 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1383 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1385 /* switch GMACTPE and GMACRPE back on */
1386 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1387 regvalue |= ((1 << 5) | (1 << 6));
1388 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1390 spider_net_set_promisc(card);
1392 /* look up, whether we have been successful */
1393 if (spider_net_get_mac_address(netdev))
1394 return -EADDRNOTAVAIL;
1395 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1396 return -EADDRNOTAVAIL;
1402 * spider_net_link_reset
1403 * @netdev: net device structure
1405 * This is called when the PHY_LINK signal is asserted. For the blade this is
1406 * not connected so we should never get here.
1410 spider_net_link_reset(struct net_device *netdev)
1413 struct spider_net_card *card = netdev_priv(netdev);
1415 del_timer_sync(&card->aneg_timer);
1417 /* clear interrupt, block further interrupts */
1418 spider_net_write_reg(card, SPIDER_NET_GMACST,
1419 spider_net_read_reg(card, SPIDER_NET_GMACST));
1420 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1422 /* reset phy and setup aneg */
1423 spider_net_setup_aneg(card);
1424 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1429 * spider_net_handle_error_irq - handles errors raised by an interrupt
1430 * @card: card structure
1431 * @status_reg: interrupt status register 0 (GHIINT0STS)
1433 * spider_net_handle_error_irq treats or ignores all error conditions
1434 * found when an interrupt is presented
1437 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1439 u32 error_reg1, error_reg2;
1443 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1444 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1446 /* check GHIINT0STS ************************************/
1448 for (i = 0; i < 32; i++)
1449 if (status_reg & (1<<i))
1452 /* let error_reg1 and error_reg2 evaluation decide, what to do
1453 case SPIDER_NET_PHYINT:
1454 case SPIDER_NET_GMAC2INT:
1455 case SPIDER_NET_GMAC1INT:
1456 case SPIDER_NET_GFIFOINT:
1457 case SPIDER_NET_DMACINT:
1458 case SPIDER_NET_GSYSINT:
1461 case SPIDER_NET_GIPSINT:
1465 case SPIDER_NET_GPWOPCMPINT:
1466 /* PHY write operation completed */
1469 case SPIDER_NET_GPROPCMPINT:
1470 /* PHY read operation completed */
1471 /* we don't use semaphores, as we poll for the completion
1472 * of the read operation in spider_net_read_phy. Should take
1476 case SPIDER_NET_GPWFFINT:
1477 /* PHY command queue full */
1478 if (netif_msg_intr(card))
1479 dev_err(&card->netdev->dev, "PHY write queue full\n");
1483 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1484 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1485 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1487 case SPIDER_NET_GDTDEN0INT:
1488 /* someone has set TX_DMA_EN to 0 */
1492 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1493 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1494 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1495 case SPIDER_NET_GDADEN0INT:
1496 /* someone has set RX_DMA_EN to 0 */
1501 case SPIDER_NET_GDDFDCINT:
1502 case SPIDER_NET_GDCFDCINT:
1503 case SPIDER_NET_GDBFDCINT:
1504 case SPIDER_NET_GDAFDCINT:
1505 /* case SPIDER_NET_GDNMINT: not used. print a message */
1506 /* case SPIDER_NET_GCNMINT: not used. print a message */
1507 /* case SPIDER_NET_GBNMINT: not used. print a message */
1508 /* case SPIDER_NET_GANMINT: not used. print a message */
1509 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1514 case SPIDER_NET_GDTFDCINT:
1517 case SPIDER_NET_GTTEDINT:
1520 case SPIDER_NET_GDTDCEINT:
1521 /* chain end. If a descriptor should be sent, kick off
1523 if (card->tx_chain.tail != card->tx_chain.head)
1524 spider_net_kick_tx_dma(card);
1529 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1530 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1533 /* check GHIINT1STS ************************************/
1535 for (i = 0; i < 32; i++)
1536 if (error_reg1 & (1<<i))
1539 case SPIDER_NET_GTMFLLINT:
1540 /* TX RAM full may happen on a usual case.
1541 * Logging is not needed. */
1544 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1545 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1546 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1547 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1548 case SPIDER_NET_GRMFLLINT:
1549 /* Could happen when rx chain is full */
1550 if (card->ignore_rx_ramfull == 0) {
1551 card->ignore_rx_ramfull = 1;
1552 spider_net_resync_head_ptr(card);
1553 spider_net_refill_rx_chain(card);
1554 spider_net_enable_rxdmac(card);
1555 card->num_rx_ints ++;
1556 netif_rx_schedule(card->netdev);
1561 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1562 case SPIDER_NET_GDTINVDINT:
1563 /* allrighty. tx from previous descr ok */
1568 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1569 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1570 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1571 case SPIDER_NET_GDADCEINT:
1572 spider_net_resync_head_ptr(card);
1573 spider_net_refill_rx_chain(card);
1574 spider_net_enable_rxdmac(card);
1575 card->num_rx_ints ++;
1576 netif_rx_schedule(card->netdev);
1580 /* invalid descriptor */
1581 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1582 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1583 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1584 case SPIDER_NET_GDAINVDINT:
1585 /* Could happen when rx chain is full */
1586 spider_net_resync_head_ptr(card);
1587 spider_net_refill_rx_chain(card);
1588 spider_net_enable_rxdmac(card);
1589 card->num_rx_ints ++;
1590 netif_rx_schedule(card->netdev);
1594 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1595 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1596 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1597 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1598 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1599 /* case SPIDER_NET_GDSERINT: problem, print a message */
1600 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1601 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1602 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1603 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1604 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1610 /* check GHIINT2STS ************************************/
1612 for (i = 0; i < 32; i++)
1613 if (error_reg2 & (1<<i))
1616 /* there is nothing we can (want to) do at this time. Log a
1617 * message, we can switch on and off the specific values later on
1618 case SPIDER_NET_GPROPERINT:
1619 case SPIDER_NET_GMCTCRSNGINT:
1620 case SPIDER_NET_GMCTLCOLINT:
1621 case SPIDER_NET_GMCTTMOTINT:
1622 case SPIDER_NET_GMCRCAERINT:
1623 case SPIDER_NET_GMCRCALERINT:
1624 case SPIDER_NET_GMCRALNERINT:
1625 case SPIDER_NET_GMCROVRINT:
1626 case SPIDER_NET_GMCRRNTINT:
1627 case SPIDER_NET_GMCRRXERINT:
1628 case SPIDER_NET_GTITCSERINT:
1629 case SPIDER_NET_GTIFMTERINT:
1630 case SPIDER_NET_GTIPKTRVKINT:
1631 case SPIDER_NET_GTISPINGINT:
1632 case SPIDER_NET_GTISADNGINT:
1633 case SPIDER_NET_GTISPDNGINT:
1634 case SPIDER_NET_GRIFMTERINT:
1635 case SPIDER_NET_GRIPKTRVKINT:
1636 case SPIDER_NET_GRISPINGINT:
1637 case SPIDER_NET_GRISADNGINT:
1638 case SPIDER_NET_GRISPDNGINT:
1645 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
1646 dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, "
1647 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1648 status_reg, error_reg1, error_reg2);
1650 /* clear interrupt sources */
1651 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1652 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1656 * spider_net_interrupt - interrupt handler for spider_net
1657 * @irq: interupt number
1658 * @ptr: pointer to net_device
1659 * @regs: PU registers
1661 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1662 * interrupt found raised by card.
1664 * This is the interrupt handler, that turns off
1665 * interrupts for this device and makes the stack poll the driver
1668 spider_net_interrupt(int irq, void *ptr)
1670 struct net_device *netdev = ptr;
1671 struct spider_net_card *card = netdev_priv(netdev);
1674 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1679 if (status_reg & SPIDER_NET_RXINT ) {
1680 spider_net_rx_irq_off(card);
1681 netif_rx_schedule(netdev);
1682 card->num_rx_ints ++;
1684 if (status_reg & SPIDER_NET_TXINT)
1685 netif_rx_schedule(netdev);
1687 if (status_reg & SPIDER_NET_LINKINT)
1688 spider_net_link_reset(netdev);
1690 if (status_reg & SPIDER_NET_ERRINT )
1691 spider_net_handle_error_irq(card, status_reg);
1693 /* clear interrupt sources */
1694 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1699 #ifdef CONFIG_NET_POLL_CONTROLLER
1701 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1702 * @netdev: interface device structure
1704 * see Documentation/networking/netconsole.txt
1707 spider_net_poll_controller(struct net_device *netdev)
1709 disable_irq(netdev->irq);
1710 spider_net_interrupt(netdev->irq, netdev);
1711 enable_irq(netdev->irq);
1713 #endif /* CONFIG_NET_POLL_CONTROLLER */
1716 * spider_net_init_card - initializes the card
1717 * @card: card structure
1719 * spider_net_init_card initializes the card so that other registers can
1723 spider_net_init_card(struct spider_net_card *card)
1725 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1726 SPIDER_NET_CKRCTRL_STOP_VALUE);
1728 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1729 SPIDER_NET_CKRCTRL_RUN_VALUE);
1731 /* trigger ETOMOD signal */
1732 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1733 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1738 * spider_net_enable_card - enables the card by setting all kinds of regs
1739 * @card: card structure
1741 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1744 spider_net_enable_card(struct spider_net_card *card)
1747 /* the following array consists of (register),(value) pairs
1748 * that are set in this function. A register of 0 ends the list */
1750 { SPIDER_NET_GRESUMINTNUM, 0 },
1751 { SPIDER_NET_GREINTNUM, 0 },
1753 /* set interrupt frame number registers */
1754 /* clear the single DMA engine registers first */
1755 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1756 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1757 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1758 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1759 /* then set, what we really need */
1760 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1762 /* timer counter registers and stuff */
1763 { SPIDER_NET_GFREECNNUM, 0 },
1764 { SPIDER_NET_GONETIMENUM, 0 },
1765 { SPIDER_NET_GTOUTFRMNUM, 0 },
1767 /* RX mode setting */
1768 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1769 /* TX mode setting */
1770 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1771 /* IPSEC mode setting */
1772 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1774 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1776 { SPIDER_NET_GMRWOLCTRL, 0 },
1777 { SPIDER_NET_GTESTMD, 0x10000000 },
1778 { SPIDER_NET_GTTQMSK, 0x00400040 },
1780 { SPIDER_NET_GMACINTEN, 0 },
1782 /* flow control stuff */
1783 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1784 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1786 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1791 while (regs[i][0]) {
1792 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1796 /* clear unicast filter table entries 1 to 14 */
1797 for (i = 1; i <= 14; i++) {
1798 spider_net_write_reg(card,
1799 SPIDER_NET_GMRUAFILnR + i * 8,
1801 spider_net_write_reg(card,
1802 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1806 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1808 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1810 /* set chain tail adress for RX chains and
1812 spider_net_enable_rxchtails(card);
1813 spider_net_enable_rxdmac(card);
1815 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1817 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1818 SPIDER_NET_LENLMT_VALUE);
1819 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1820 SPIDER_NET_OPMODE_VALUE);
1822 /* set interrupt mask registers */
1823 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1824 SPIDER_NET_INT0_MASK_VALUE);
1825 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1826 SPIDER_NET_INT1_MASK_VALUE);
1827 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1828 SPIDER_NET_INT2_MASK_VALUE);
1830 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1831 SPIDER_NET_GDTBSTA);
1835 * spider_net_download_firmware - loads firmware into the adapter
1836 * @card: card structure
1837 * @firmware_ptr: pointer to firmware data
1839 * spider_net_download_firmware loads the firmware data into the
1840 * adapter. It assumes the length etc. to be allright.
1843 spider_net_download_firmware(struct spider_net_card *card,
1844 const void *firmware_ptr)
1847 const u32 *fw_ptr = firmware_ptr;
1849 /* stop sequencers */
1850 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1851 SPIDER_NET_STOP_SEQ_VALUE);
1853 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1855 spider_net_write_reg(card,
1856 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1857 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1858 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1859 sequencer * 8, *fw_ptr);
1864 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1867 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1868 SPIDER_NET_RUN_SEQ_VALUE);
1874 * spider_net_init_firmware - reads in firmware parts
1875 * @card: card structure
1877 * Returns 0 on success, <0 on failure
1879 * spider_net_init_firmware opens the sequencer firmware and does some basic
1880 * checks. This function opens and releases the firmware structure. A call
1881 * to download the firmware is performed before the release.
1885 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1886 * the program for each sequencer. Use the command
1887 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1888 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1889 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1891 * to generate spider_fw.bin, if you have sequencer programs with something
1892 * like the following contents for each sequencer:
1893 * <ONE LINE COMMENT>
1894 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1895 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1897 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1900 spider_net_init_firmware(struct spider_net_card *card)
1902 struct firmware *firmware = NULL;
1903 struct device_node *dn;
1904 const u8 *fw_prop = NULL;
1908 if (request_firmware((const struct firmware **)&firmware,
1909 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1910 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1911 netif_msg_probe(card) ) {
1912 dev_err(&card->netdev->dev,
1913 "Incorrect size of spidernet firmware in " \
1914 "filesystem. Looking in host firmware...\n");
1917 err = spider_net_download_firmware(card, firmware->data);
1919 release_firmware(firmware);
1927 dn = pci_device_to_OF_node(card->pdev);
1931 fw_prop = of_get_property(dn, "firmware", &fw_size);
1935 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1936 netif_msg_probe(card) ) {
1937 dev_err(&card->netdev->dev,
1938 "Incorrect size of spidernet firmware in host firmware\n");
1942 err = spider_net_download_firmware(card, fw_prop);
1947 if (netif_msg_probe(card))
1948 dev_err(&card->netdev->dev,
1949 "Couldn't find spidernet firmware in filesystem " \
1950 "or host firmware\n");
1955 * spider_net_open - called upon ifonfig up
1956 * @netdev: interface device structure
1958 * returns 0 on success, <0 on failure
1960 * spider_net_open allocates all the descriptors and memory needed for
1961 * operation, sets up multicast list and enables interrupts
1964 spider_net_open(struct net_device *netdev)
1966 struct spider_net_card *card = netdev_priv(netdev);
1969 result = spider_net_init_firmware(card);
1971 goto init_firmware_failed;
1973 /* start probing with copper */
1974 spider_net_setup_aneg(card);
1975 if (card->phy.def->phy_id)
1976 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1978 result = spider_net_init_chain(card, &card->tx_chain);
1980 goto alloc_tx_failed;
1981 card->low_watermark = NULL;
1983 result = spider_net_init_chain(card, &card->rx_chain);
1985 goto alloc_rx_failed;
1987 /* Allocate rx skbs */
1988 if (spider_net_alloc_rx_skbs(card))
1989 goto alloc_skbs_failed;
1991 spider_net_set_multi(netdev);
1993 /* further enhancement: setup hw vlan, if needed */
1996 if (request_irq(netdev->irq, spider_net_interrupt,
1997 IRQF_SHARED, netdev->name, netdev))
1998 goto register_int_failed;
2000 spider_net_enable_card(card);
2002 netif_start_queue(netdev);
2003 netif_carrier_on(netdev);
2004 netif_poll_enable(netdev);
2008 register_int_failed:
2009 spider_net_free_rx_chain_contents(card);
2011 spider_net_free_chain(card, &card->rx_chain);
2013 spider_net_free_chain(card, &card->tx_chain);
2015 del_timer_sync(&card->aneg_timer);
2016 init_firmware_failed:
2021 * spider_net_link_phy
2022 * @data: used for pointer to card structure
2025 static void spider_net_link_phy(unsigned long data)
2027 struct spider_net_card *card = (struct spider_net_card *)data;
2028 struct mii_phy *phy = &card->phy;
2030 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
2031 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
2033 pr_info("%s: link is down trying to bring it up\n", card->netdev->name);
2035 switch (card->medium) {
2036 case BCM54XX_COPPER:
2037 /* enable fiber with autonegotiation first */
2038 if (phy->def->ops->enable_fiber)
2039 phy->def->ops->enable_fiber(phy, 1);
2040 card->medium = BCM54XX_FIBER;
2044 /* fiber didn't come up, try to disable fiber autoneg */
2045 if (phy->def->ops->enable_fiber)
2046 phy->def->ops->enable_fiber(phy, 0);
2047 card->medium = BCM54XX_UNKNOWN;
2050 case BCM54XX_UNKNOWN:
2051 /* copper, fiber with and without failed,
2052 * retry from beginning */
2053 spider_net_setup_aneg(card);
2054 card->medium = BCM54XX_COPPER;
2058 card->aneg_count = 0;
2059 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2063 /* link still not up, try again later */
2064 if (!(phy->def->ops->poll_link(phy))) {
2066 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2070 /* link came up, get abilities */
2071 phy->def->ops->read_link(phy);
2073 spider_net_write_reg(card, SPIDER_NET_GMACST,
2074 spider_net_read_reg(card, SPIDER_NET_GMACST));
2075 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
2077 if (phy->speed == 1000)
2078 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
2080 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
2082 card->aneg_count = 0;
2084 pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n",
2085 phy->def->name, phy->speed, phy->duplex==1 ? "Full" : "Half",
2086 phy->autoneg==1 ? "" : "no ");
2092 * spider_net_setup_phy - setup PHY
2093 * @card: card structure
2095 * returns 0 on success, <0 on failure
2097 * spider_net_setup_phy is used as part of spider_net_probe.
2100 spider_net_setup_phy(struct spider_net_card *card)
2102 struct mii_phy *phy = &card->phy;
2104 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
2105 SPIDER_NET_DMASEL_VALUE);
2106 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
2107 SPIDER_NET_PHY_CTRL_VALUE);
2109 phy->dev = card->netdev;
2110 phy->mdio_read = spider_net_read_phy;
2111 phy->mdio_write = spider_net_write_phy;
2113 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
2115 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
2116 if (id != 0x0000 && id != 0xffff) {
2117 if (!mii_phy_probe(phy, phy->mii_id)) {
2118 pr_info("Found %s.\n", phy->def->name);
2128 * spider_net_workaround_rxramfull - work around firmware bug
2129 * @card: card structure
2134 spider_net_workaround_rxramfull(struct spider_net_card *card)
2136 int i, sequencer = 0;
2139 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2140 SPIDER_NET_CKRCTRL_RUN_VALUE);
2142 /* empty sequencer data */
2143 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2145 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
2146 sequencer * 8, 0x0);
2147 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
2148 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2149 sequencer * 8, 0x0);
2153 /* set sequencer operation */
2154 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2157 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2158 SPIDER_NET_CKRCTRL_STOP_VALUE);
2162 * spider_net_stop - called upon ifconfig down
2163 * @netdev: interface device structure
2168 spider_net_stop(struct net_device *netdev)
2170 struct spider_net_card *card = netdev_priv(netdev);
2172 netif_poll_disable(netdev);
2173 netif_carrier_off(netdev);
2174 netif_stop_queue(netdev);
2175 del_timer_sync(&card->tx_timer);
2176 del_timer_sync(&card->aneg_timer);
2178 /* disable/mask all interrupts */
2179 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
2180 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
2181 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
2182 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
2184 free_irq(netdev->irq, netdev);
2186 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2187 SPIDER_NET_DMA_TX_FEND_VALUE);
2189 /* turn off DMA, force end */
2190 spider_net_disable_rxdmac(card);
2192 /* release chains */
2193 spider_net_release_tx_chain(card, 1);
2194 spider_net_free_rx_chain_contents(card);
2196 spider_net_free_chain(card, &card->tx_chain);
2197 spider_net_free_chain(card, &card->rx_chain);
2203 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2204 * function (to be called not under interrupt status)
2205 * @data: data, is interface device structure
2207 * called as task when tx hangs, resets interface (if interface is up)
2210 spider_net_tx_timeout_task(struct work_struct *work)
2212 struct spider_net_card *card =
2213 container_of(work, struct spider_net_card, tx_timeout_task);
2214 struct net_device *netdev = card->netdev;
2216 if (!(netdev->flags & IFF_UP))
2219 netif_device_detach(netdev);
2220 spider_net_stop(netdev);
2222 spider_net_workaround_rxramfull(card);
2223 spider_net_init_card(card);
2225 if (spider_net_setup_phy(card))
2228 spider_net_open(netdev);
2229 spider_net_kick_tx_dma(card);
2230 netif_device_attach(netdev);
2233 atomic_dec(&card->tx_timeout_task_counter);
2237 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2238 * @netdev: interface device structure
2240 * called, if tx hangs. Schedules a task that resets the interface
2243 spider_net_tx_timeout(struct net_device *netdev)
2245 struct spider_net_card *card;
2247 card = netdev_priv(netdev);
2248 atomic_inc(&card->tx_timeout_task_counter);
2249 if (netdev->flags & IFF_UP)
2250 schedule_work(&card->tx_timeout_task);
2252 atomic_dec(&card->tx_timeout_task_counter);
2253 card->spider_stats.tx_timeouts++;
2257 * spider_net_setup_netdev_ops - initialization of net_device operations
2258 * @netdev: net_device structure
2260 * fills out function pointers in the net_device structure
2263 spider_net_setup_netdev_ops(struct net_device *netdev)
2265 netdev->open = &spider_net_open;
2266 netdev->stop = &spider_net_stop;
2267 netdev->hard_start_xmit = &spider_net_xmit;
2268 netdev->get_stats = &spider_net_get_stats;
2269 netdev->set_multicast_list = &spider_net_set_multi;
2270 netdev->set_mac_address = &spider_net_set_mac;
2271 netdev->change_mtu = &spider_net_change_mtu;
2272 netdev->do_ioctl = &spider_net_do_ioctl;
2274 netdev->tx_timeout = &spider_net_tx_timeout;
2275 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2277 netdev->poll = &spider_net_poll;
2278 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
2280 #ifdef CONFIG_NET_POLL_CONTROLLER
2281 /* poll controller */
2282 netdev->poll_controller = &spider_net_poll_controller;
2283 #endif /* CONFIG_NET_POLL_CONTROLLER */
2285 netdev->ethtool_ops = &spider_net_ethtool_ops;
2289 * spider_net_setup_netdev - initialization of net_device
2290 * @card: card structure
2292 * Returns 0 on success or <0 on failure
2294 * spider_net_setup_netdev initializes the net_device structure
2297 spider_net_setup_netdev(struct spider_net_card *card)
2300 struct net_device *netdev = card->netdev;
2301 struct device_node *dn;
2302 struct sockaddr addr;
2305 SET_MODULE_OWNER(netdev);
2306 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2308 pci_set_drvdata(card->pdev, netdev);
2310 init_timer(&card->tx_timer);
2311 card->tx_timer.function =
2312 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2313 card->tx_timer.data = (unsigned long) card;
2314 netdev->irq = card->pdev->irq;
2316 card->aneg_count = 0;
2317 init_timer(&card->aneg_timer);
2318 card->aneg_timer.function = spider_net_link_phy;
2319 card->aneg_timer.data = (unsigned long) card;
2321 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2323 spider_net_setup_netdev_ops(netdev);
2325 netdev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX;
2326 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2327 * NETIF_F_HW_VLAN_FILTER */
2329 netdev->irq = card->pdev->irq;
2330 card->num_rx_ints = 0;
2331 card->ignore_rx_ramfull = 0;
2333 dn = pci_device_to_OF_node(card->pdev);
2337 mac = of_get_property(dn, "local-mac-address", NULL);
2340 memcpy(addr.sa_data, mac, ETH_ALEN);
2342 result = spider_net_set_mac(netdev, &addr);
2343 if ((result) && (netif_msg_probe(card)))
2344 dev_err(&card->netdev->dev,
2345 "Failed to set MAC address: %i\n", result);
2347 result = register_netdev(netdev);
2349 if (netif_msg_probe(card))
2350 dev_err(&card->netdev->dev,
2351 "Couldn't register net_device: %i\n", result);
2355 if (netif_msg_probe(card))
2356 pr_info("Initialized device %s.\n", netdev->name);
2362 * spider_net_alloc_card - allocates net_device and card structure
2364 * returns the card structure or NULL in case of errors
2366 * the card and net_device structures are linked to each other
2368 static struct spider_net_card *
2369 spider_net_alloc_card(void)
2371 struct net_device *netdev;
2372 struct spider_net_card *card;
2375 alloc_size = sizeof(struct spider_net_card) +
2376 (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr);
2377 netdev = alloc_etherdev(alloc_size);
2381 card = netdev_priv(netdev);
2382 card->netdev = netdev;
2383 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2384 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
2385 init_waitqueue_head(&card->waitq);
2386 atomic_set(&card->tx_timeout_task_counter, 0);
2388 card->rx_chain.num_desc = rx_descriptors;
2389 card->rx_chain.ring = card->darray;
2390 card->tx_chain.num_desc = tx_descriptors;
2391 card->tx_chain.ring = card->darray + rx_descriptors;
2397 * spider_net_undo_pci_setup - releases PCI ressources
2398 * @card: card structure
2400 * spider_net_undo_pci_setup releases the mapped regions
2403 spider_net_undo_pci_setup(struct spider_net_card *card)
2405 iounmap(card->regs);
2406 pci_release_regions(card->pdev);
2410 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2411 * @card: card structure
2414 * Returns the card structure or NULL if any errors occur
2416 * spider_net_setup_pci_dev initializes pdev and together with the
2417 * functions called in spider_net_open configures the device so that
2418 * data can be transferred over it
2419 * The net_device structure is attached to the card structure, if the
2420 * function returns without error.
2422 static struct spider_net_card *
2423 spider_net_setup_pci_dev(struct pci_dev *pdev)
2425 struct spider_net_card *card;
2426 unsigned long mmio_start, mmio_len;
2428 if (pci_enable_device(pdev)) {
2429 dev_err(&pdev->dev, "Couldn't enable PCI device\n");
2433 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2435 "Couldn't find proper PCI device base address.\n");
2436 goto out_disable_dev;
2439 if (pci_request_regions(pdev, spider_net_driver_name)) {
2441 "Couldn't obtain PCI resources, aborting.\n");
2442 goto out_disable_dev;
2445 pci_set_master(pdev);
2447 card = spider_net_alloc_card();
2450 "Couldn't allocate net_device structure, aborting.\n");
2451 goto out_release_regions;
2455 /* fetch base address and length of first resource */
2456 mmio_start = pci_resource_start(pdev, 0);
2457 mmio_len = pci_resource_len(pdev, 0);
2459 card->netdev->mem_start = mmio_start;
2460 card->netdev->mem_end = mmio_start + mmio_len;
2461 card->regs = ioremap(mmio_start, mmio_len);
2465 "Couldn't obtain PCI resources, aborting.\n");
2466 goto out_release_regions;
2471 out_release_regions:
2472 pci_release_regions(pdev);
2474 pci_disable_device(pdev);
2475 pci_set_drvdata(pdev, NULL);
2480 * spider_net_probe - initialization of a device
2482 * @ent: entry in the device id list
2484 * Returns 0 on success, <0 on failure
2486 * spider_net_probe initializes pdev and registers a net_device
2487 * structure for it. After that, the device can be ifconfig'ed up
2489 static int __devinit
2490 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2493 struct spider_net_card *card;
2495 card = spider_net_setup_pci_dev(pdev);
2499 spider_net_workaround_rxramfull(card);
2500 spider_net_init_card(card);
2502 err = spider_net_setup_phy(card);
2506 err = spider_net_setup_netdev(card);
2513 spider_net_undo_pci_setup(card);
2514 free_netdev(card->netdev);
2520 * spider_net_remove - removal of a device
2523 * Returns 0 on success, <0 on failure
2525 * spider_net_remove is called to remove the device and unregisters the
2528 static void __devexit
2529 spider_net_remove(struct pci_dev *pdev)
2531 struct net_device *netdev;
2532 struct spider_net_card *card;
2534 netdev = pci_get_drvdata(pdev);
2535 card = netdev_priv(netdev);
2537 wait_event(card->waitq,
2538 atomic_read(&card->tx_timeout_task_counter) == 0);
2540 unregister_netdev(netdev);
2542 /* switch off card */
2543 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2544 SPIDER_NET_CKRCTRL_STOP_VALUE);
2545 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2546 SPIDER_NET_CKRCTRL_RUN_VALUE);
2548 spider_net_undo_pci_setup(card);
2549 free_netdev(netdev);
2552 static struct pci_driver spider_net_driver = {
2553 .name = spider_net_driver_name,
2554 .id_table = spider_net_pci_tbl,
2555 .probe = spider_net_probe,
2556 .remove = __devexit_p(spider_net_remove)
2560 * spider_net_init - init function when the driver is loaded
2562 * spider_net_init registers the device driver
2564 static int __init spider_net_init(void)
2566 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2568 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2569 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2570 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2572 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2573 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2574 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2576 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2577 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2578 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2580 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2581 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2582 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2585 return pci_register_driver(&spider_net_driver);
2589 * spider_net_cleanup - exit function when driver is unloaded
2591 * spider_net_cleanup unregisters the device driver
2593 static void __exit spider_net_cleanup(void)
2595 pci_unregister_driver(&spider_net_driver);
2598 module_init(spider_net_init);
2599 module_exit(spider_net_cleanup);