2 * Network device driver for Cell Processor-Based Blade
4 * (C) Copyright IBM Corp. 2005
6 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
7 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/compiler.h>
25 #include <linux/crc32.h>
26 #include <linux/delay.h>
27 #include <linux/etherdevice.h>
28 #include <linux/ethtool.h>
29 #include <linux/firmware.h>
30 #include <linux/if_vlan.h>
32 #include <linux/init.h>
33 #include <linux/ioport.h>
35 #include <linux/kernel.h>
36 #include <linux/mii.h>
37 #include <linux/module.h>
38 #include <linux/netdevice.h>
39 #include <linux/device.h>
40 #include <linux/pci.h>
41 #include <linux/skbuff.h>
42 #include <linux/slab.h>
43 #include <linux/tcp.h>
44 #include <linux/types.h>
45 #include <linux/vmalloc.h>
46 #include <linux/wait.h>
47 #include <linux/workqueue.h>
48 #include <asm/bitops.h>
49 #include <asm/pci-bridge.h>
50 #include <net/checksum.h>
52 #include "spider_net.h"
54 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
55 "<Jens.Osterkamp@de.ibm.com>");
56 MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
57 MODULE_LICENSE("GPL");
58 MODULE_VERSION(VERSION);
60 static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
61 static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
63 module_param(rx_descriptors, int, 0444);
64 module_param(tx_descriptors, int, 0444);
66 MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
68 MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
71 char spider_net_driver_name[] = "spidernet";
73 static struct pci_device_id spider_net_pci_tbl[] = {
74 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
75 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
79 MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
82 * spider_net_read_reg - reads an SMMIO register of a card
83 * @card: device structure
84 * @reg: register to read from
86 * returns the content of the specified SMMIO register.
89 spider_net_read_reg(struct spider_net_card *card, u32 reg)
93 value = readl(card->regs + reg);
94 value = le32_to_cpu(value);
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 value = cpu_to_le32(value);
109 writel(value, card->regs + reg);
112 /** spider_net_write_phy - write to phy register
113 * @netdev: adapter to be written to
116 * @val: value to be written to phy register
118 * spider_net_write_phy_register writes to an arbitrary PHY
119 * register via the spider GPCWOPCMD register. We assume the queue does
120 * not run full (not more than 15 commands outstanding).
123 spider_net_write_phy(struct net_device *netdev, int mii_id,
126 struct spider_net_card *card = netdev_priv(netdev);
129 writevalue = ((u32)mii_id << 21) |
130 ((u32)reg << 16) | ((u32)val);
132 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
135 /** spider_net_read_phy - read from phy register
136 * @netdev: network device to be read from
140 * Returns value read from PHY register
142 * spider_net_write_phy reads from an arbitrary PHY
143 * register via the spider GPCROPCMD register
146 spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
148 struct spider_net_card *card = netdev_priv(netdev);
151 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
152 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
154 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
155 * interrupt, as we poll for the completion of the read operation
156 * in spider_net_read_phy. Should take about 50 us */
158 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
159 } while (readvalue & SPIDER_NET_GPREXEC);
161 readvalue &= SPIDER_NET_GPRDAT_MASK;
167 * spider_net_rx_irq_off - switch off rx irq on this spider card
168 * @card: device structure
170 * switches off rx irq by masking them out in the GHIINTnMSK register
173 spider_net_rx_irq_off(struct spider_net_card *card)
177 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
178 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
182 * spider_net_rx_irq_on - switch on rx irq on this spider card
183 * @card: device structure
185 * switches on rx irq by enabling them in the GHIINTnMSK register
188 spider_net_rx_irq_on(struct spider_net_card *card)
192 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
193 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
197 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
198 * @card: card structure
200 * spider_net_set_promisc sets the unicast destination address filter and
201 * thus either allows for non-promisc mode or promisc mode
204 spider_net_set_promisc(struct spider_net_card *card)
207 struct net_device *netdev = card->netdev;
209 if (netdev->flags & IFF_PROMISC) {
210 /* clear destination entry 0 */
211 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
212 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
213 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
214 SPIDER_NET_PROMISC_VALUE);
216 macu = netdev->dev_addr[0];
218 macu |= netdev->dev_addr[1];
219 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
221 macu |= SPIDER_NET_UA_DESCR_VALUE;
222 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
223 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
224 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
225 SPIDER_NET_NONPROMISC_VALUE);
230 * spider_net_get_mac_address - read mac address from spider card
231 * @card: device structure
233 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
236 spider_net_get_mac_address(struct net_device *netdev)
238 struct spider_net_card *card = netdev_priv(netdev);
241 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
242 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
244 netdev->dev_addr[0] = (macu >> 24) & 0xff;
245 netdev->dev_addr[1] = (macu >> 16) & 0xff;
246 netdev->dev_addr[2] = (macu >> 8) & 0xff;
247 netdev->dev_addr[3] = macu & 0xff;
248 netdev->dev_addr[4] = (macl >> 8) & 0xff;
249 netdev->dev_addr[5] = macl & 0xff;
251 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
258 * spider_net_get_descr_status -- returns the status of a descriptor
259 * @descr: descriptor to look at
261 * returns the status as in the dmac_cmd_status field of the descriptor
264 spider_net_get_descr_status(struct spider_net_descr *descr)
266 return descr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
270 * spider_net_free_chain - free descriptor chain
271 * @card: card structure
272 * @chain: address of chain
276 spider_net_free_chain(struct spider_net_card *card,
277 struct spider_net_descr_chain *chain)
279 struct spider_net_descr *descr;
281 for (descr = chain->tail; !descr->bus_addr; descr = descr->next) {
282 pci_unmap_single(card->pdev, descr->bus_addr,
283 SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
289 * spider_net_init_chain - links descriptor chain
290 * @card: card structure
291 * @chain: address of chain
292 * @start_descr: address of descriptor array
293 * @no: number of descriptors
295 * we manage a circular list that mirrors the hardware structure,
296 * except that the hardware uses bus addresses.
298 * returns 0 on success, <0 on failure
301 spider_net_init_chain(struct spider_net_card *card,
302 struct spider_net_descr_chain *chain,
303 struct spider_net_descr *start_descr,
304 int direction, int no)
307 struct spider_net_descr *descr;
311 memset(descr, 0, sizeof(*descr) * no);
313 /* set up the hardware pointers in each descriptor */
314 for (i=0; i<no; i++, descr++) {
315 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
317 buf = pci_map_single(card->pdev, descr,
318 SPIDER_NET_DESCR_SIZE,
321 if (pci_dma_mapping_error(buf))
324 descr->bus_addr = buf;
325 descr->next = descr + 1;
326 descr->prev = descr - 1;
329 /* do actual circular list */
330 (descr-1)->next = start_descr;
331 start_descr->prev = descr-1;
334 if (direction == PCI_DMA_FROMDEVICE)
335 for (i=0; i < no; i++, descr++)
336 descr->next_descr_addr = descr->next->bus_addr;
338 spin_lock_init(&chain->lock);
339 chain->head = start_descr;
340 chain->tail = start_descr;
346 for (i=0; i < no; i++, descr++)
348 pci_unmap_single(card->pdev, descr->bus_addr,
349 SPIDER_NET_DESCR_SIZE,
355 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
356 * @card: card structure
358 * returns 0 on success, <0 on failure
361 spider_net_free_rx_chain_contents(struct spider_net_card *card)
363 struct spider_net_descr *descr;
365 descr = card->rx_chain.head;
366 while (descr->next != card->rx_chain.head) {
368 dev_kfree_skb(descr->skb);
369 pci_unmap_single(card->pdev, descr->buf_addr,
370 SPIDER_NET_MAX_FRAME,
378 * spider_net_prepare_rx_descr - reinitializes a rx descriptor
379 * @card: card structure
380 * @descr: descriptor to re-init
382 * return 0 on succes, <0 on failure
384 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
385 * Activate the descriptor state-wise
388 spider_net_prepare_rx_descr(struct spider_net_card *card,
389 struct spider_net_descr *descr)
396 /* we need to round up the buffer size to a multiple of 128 */
397 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
398 (~(SPIDER_NET_RXBUF_ALIGN - 1));
400 /* and we need to have it 128 byte aligned, therefore we allocate a
402 /* allocate an skb */
403 descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
405 if (netif_msg_rx_err(card) && net_ratelimit())
406 pr_err("Not enough memory to allocate rx buffer\n");
407 card->spider_stats.alloc_rx_skb_error++;
410 descr->buf_size = bufsize;
411 descr->result_size = 0;
412 descr->valid_size = 0;
413 descr->data_status = 0;
414 descr->data_error = 0;
416 offset = ((unsigned long)descr->skb->data) &
417 (SPIDER_NET_RXBUF_ALIGN - 1);
419 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
420 /* io-mmu-map the skb */
421 buf = pci_map_single(card->pdev, descr->skb->data,
422 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
423 descr->buf_addr = buf;
424 if (pci_dma_mapping_error(buf)) {
425 dev_kfree_skb_any(descr->skb);
426 if (netif_msg_rx_err(card) && net_ratelimit())
427 pr_err("Could not iommu-map rx buffer\n");
428 card->spider_stats.rx_iommu_map_error++;
429 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
431 descr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
432 SPIDER_NET_DMAC_NOINTR_COMPLETE;
439 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
440 * @card: card structure
442 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
443 * chip by writing to the appropriate register. DMA is enabled in
444 * spider_net_enable_rxdmac.
447 spider_net_enable_rxchtails(struct spider_net_card *card)
449 /* assume chain is aligned correctly */
450 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
451 card->rx_chain.tail->bus_addr);
455 * spider_net_enable_rxdmac - enables a receive DMA controller
456 * @card: card structure
458 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
459 * in the GDADMACCNTR register
462 spider_net_enable_rxdmac(struct spider_net_card *card)
465 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
466 SPIDER_NET_DMA_RX_VALUE);
470 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
471 * @card: card structure
473 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
476 spider_net_refill_rx_chain(struct spider_net_card *card)
478 struct spider_net_descr_chain *chain = &card->rx_chain;
481 /* one context doing the refill (and a second context seeing that
482 * and omitting it) is ok. If called by NAPI, we'll be called again
483 * as spider_net_decode_one_descr is called several times. If some
484 * interrupt calls us, the NAPI is about to clean up anyway. */
485 if (!spin_trylock_irqsave(&chain->lock, flags))
488 while (spider_net_get_descr_status(chain->head) ==
489 SPIDER_NET_DESCR_NOT_IN_USE) {
490 if (spider_net_prepare_rx_descr(card, chain->head))
492 chain->head = chain->head->next;
495 spin_unlock_irqrestore(&chain->lock, flags);
499 * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
500 * @card: card structure
502 * returns 0 on success, <0 on failure
505 spider_net_alloc_rx_skbs(struct spider_net_card *card)
508 struct spider_net_descr_chain *chain;
512 chain = &card->rx_chain;
513 /* put at least one buffer into the chain. if this fails,
514 * we've got a problem. if not, spider_net_refill_rx_chain
515 * will do the rest at the end of this function */
516 if (spider_net_prepare_rx_descr(card, chain->head))
519 chain->head = chain->head->next;
521 /* this will allocate the rest of the rx buffers; if not, it's
522 * business as usual later on */
523 spider_net_refill_rx_chain(card);
524 spider_net_enable_rxdmac(card);
528 spider_net_free_rx_chain_contents(card);
533 * spider_net_get_multicast_hash - generates hash for multicast filter table
534 * @addr: multicast address
536 * returns the hash value.
538 * spider_net_get_multicast_hash calculates a hash value for a given multicast
539 * address, that is used to set the multicast filter tables
542 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
546 char addr_for_crc[ETH_ALEN] = { 0, };
549 for (i = 0; i < ETH_ALEN * 8; i++) {
550 bit = (addr[i / 8] >> (i % 8)) & 1;
551 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
554 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
565 * spider_net_set_multi - sets multicast addresses and promisc flags
566 * @netdev: interface device structure
568 * spider_net_set_multi configures multicast addresses as needed for the
569 * netdev interface. It also sets up multicast, allmulti and promisc
570 * flags appropriately
573 spider_net_set_multi(struct net_device *netdev)
575 struct dev_mc_list *mc;
579 struct spider_net_card *card = netdev_priv(netdev);
580 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
583 spider_net_set_promisc(card);
585 if (netdev->flags & IFF_ALLMULTI) {
586 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
592 /* well, we know, what the broadcast hash value is: it's xfd
593 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
594 set_bit(0xfd, bitmask);
596 for (mc = netdev->mc_list; mc; mc = mc->next) {
597 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
598 set_bit(hash, bitmask);
602 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
604 if (test_bit(i * 4, bitmask))
607 if (test_bit(i * 4 + 1, bitmask))
610 if (test_bit(i * 4 + 2, bitmask))
613 if (test_bit(i * 4 + 3, bitmask))
616 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
621 * spider_net_disable_rxdmac - disables the receive DMA controller
622 * @card: card structure
624 * spider_net_disable_rxdmac terminates processing on the DMA controller by
625 * turing off DMA and issueing a force end
628 spider_net_disable_rxdmac(struct spider_net_card *card)
630 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
631 SPIDER_NET_DMA_RX_FEND_VALUE);
635 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
636 * @card: card structure
637 * @descr: descriptor structure to fill out
638 * @skb: packet to use
640 * returns 0 on success, <0 on failure.
642 * fills out the descriptor structure with skb data and len. Copies data,
643 * if needed (32bit DMA!)
646 spider_net_prepare_tx_descr(struct spider_net_card *card,
649 struct spider_net_descr *descr = card->tx_chain.head;
654 if (length < ETH_ZLEN) {
655 if (skb_pad(skb, ETH_ZLEN-length))
660 buf = pci_map_single(card->pdev, skb->data, length, PCI_DMA_TODEVICE);
661 if (pci_dma_mapping_error(buf)) {
662 if (netif_msg_tx_err(card) && net_ratelimit())
663 pr_err("could not iommu-map packet (%p, %i). "
664 "Dropping packet\n", skb->data, length);
665 card->spider_stats.tx_iommu_map_error++;
669 descr->buf_addr = buf;
670 descr->buf_size = length;
671 descr->next_descr_addr = 0;
673 descr->data_status = 0;
675 descr->dmac_cmd_status =
676 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
677 if (skb->protocol == htons(ETH_P_IP))
678 switch (skb->nh.iph->protocol) {
680 descr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
683 descr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
687 /* Chain the bus address, so that the DMA engine finds this descr. */
688 descr->prev->next_descr_addr = descr->bus_addr;
690 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
695 * spider_net_release_tx_descr - processes a used tx descriptor
696 * @card: card structure
697 * @descr: descriptor to release
699 * releases a used tx descriptor (unmapping, freeing of skb)
702 spider_net_release_tx_descr(struct spider_net_card *card)
704 struct spider_net_descr *descr = card->tx_chain.tail;
708 card->tx_chain.tail = card->tx_chain.tail->next;
709 descr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
715 len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
716 pci_unmap_single(card->pdev, descr->buf_addr, len,
722 spider_net_set_low_watermark(struct spider_net_card *card)
727 struct spider_net_descr *descr = card->tx_chain.tail;
729 /* Measure the length of the queue. */
730 while (descr != card->tx_chain.head) {
731 status = descr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
732 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
738 /* If TX queue is short, don't even bother with interrupts */
739 if (cnt < card->tx_desc/4)
742 /* Set low-watermark 3/4th's of the way into the queue. */
743 descr = card->tx_chain.tail;
748 /* Set the new watermark, clear the old watermark */
749 descr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
750 if (card->low_watermark && card->low_watermark != descr)
751 card->low_watermark->dmac_cmd_status =
752 card->low_watermark->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
753 card->low_watermark = descr;
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 loose initiative.
769 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
771 struct spider_net_descr_chain *chain = &card->tx_chain;
774 spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR);
776 while (chain->tail != chain->head) {
777 status = spider_net_get_descr_status(chain->tail);
779 case SPIDER_NET_DESCR_COMPLETE:
780 card->netdev_stats.tx_packets++;
781 card->netdev_stats.tx_bytes += chain->tail->skb->len;
784 case SPIDER_NET_DESCR_CARDOWNED:
787 /* fallthrough, if we release the descriptors
788 * brutally (then we don't care about
789 * SPIDER_NET_DESCR_CARDOWNED) */
791 case SPIDER_NET_DESCR_RESPONSE_ERROR:
792 case SPIDER_NET_DESCR_PROTECTION_ERROR:
793 case SPIDER_NET_DESCR_FORCE_END:
794 if (netif_msg_tx_err(card))
795 pr_err("%s: forcing end of tx descriptor "
796 "with status x%02x\n",
797 card->netdev->name, status);
798 card->netdev_stats.tx_errors++;
802 card->netdev_stats.tx_dropped++;
806 spider_net_release_tx_descr(card);
813 * spider_net_kick_tx_dma - enables TX DMA processing
814 * @card: card structure
815 * @descr: descriptor address to enable TX processing at
817 * spider_net_kick_tx_dma writes the current tx chain head as start address
818 * of the tx descriptor chain and enables the transmission DMA engine
821 spider_net_kick_tx_dma(struct spider_net_card *card)
823 struct spider_net_descr *descr;
825 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
826 SPIDER_NET_TX_DMA_EN)
829 descr = card->tx_chain.tail;
831 if (spider_net_get_descr_status(descr) ==
832 SPIDER_NET_DESCR_CARDOWNED) {
833 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
835 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
836 SPIDER_NET_DMA_TX_VALUE);
839 if (descr == card->tx_chain.head)
845 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
849 * spider_net_xmit - transmits a frame over the device
850 * @skb: packet to send out
851 * @netdev: interface device structure
853 * returns 0 on success, !0 on failure
856 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
858 struct spider_net_card *card = netdev_priv(netdev);
859 struct spider_net_descr_chain *chain = &card->tx_chain;
860 struct spider_net_descr *descr = chain->head;
863 spin_lock_irqsave(&chain->lock, flags);
865 spider_net_release_tx_chain(card, 0);
867 if ((chain->head->next == chain->tail->prev) ||
868 (spider_net_get_descr_status(descr) != SPIDER_NET_DESCR_NOT_IN_USE) ||
869 (spider_net_prepare_tx_descr(card, skb) != 0)) {
871 card->netdev_stats.tx_dropped++;
872 spin_unlock_irqrestore(&chain->lock, flags);
873 netif_stop_queue(netdev);
874 return NETDEV_TX_BUSY;
877 spider_net_set_low_watermark(card);
878 spider_net_kick_tx_dma(card);
879 card->tx_chain.head = card->tx_chain.head->next;
880 spin_unlock_irqrestore(&chain->lock, flags);
885 * spider_net_cleanup_tx_ring - cleans up the TX ring
886 * @card: card structure
888 * spider_net_cleanup_tx_ring is called by either the tx_timer
889 * or from the NAPI polling routine.
890 * This routine releases resources associted with transmitted
891 * packets, including updating the queue tail pointer.
894 spider_net_cleanup_tx_ring(struct spider_net_card *card)
898 spin_lock_irqsave(&card->tx_chain.lock, flags);
900 if ((spider_net_release_tx_chain(card, 0) != 0) &&
901 (card->netdev->flags & IFF_UP)) {
902 spider_net_kick_tx_dma(card);
903 netif_wake_queue(card->netdev);
905 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
909 * spider_net_do_ioctl - called for device ioctls
910 * @netdev: interface device structure
911 * @ifr: request parameter structure for ioctl
912 * @cmd: command code for ioctl
914 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
915 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
918 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
927 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
928 * @descr: descriptor to process
929 * @card: card structure
930 * @napi: whether caller is in NAPI context
932 * returns 1 on success, 0 if no packet was passed to the stack
934 * iommu-unmaps the skb, fills out skb structure and passes the data to the
935 * stack. The descriptor state is not changed.
938 spider_net_pass_skb_up(struct spider_net_descr *descr,
939 struct spider_net_card *card, int napi)
942 struct net_device *netdev;
943 u32 data_status, data_error;
945 data_status = descr->data_status;
946 data_error = descr->data_error;
948 netdev = card->netdev;
950 /* unmap descriptor */
951 pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME,
954 /* the cases we'll throw away the packet immediately */
955 if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
956 if (netif_msg_rx_err(card))
957 pr_err("error in received descriptor found, "
958 "data_status=x%08x, data_error=x%08x\n",
959 data_status, data_error);
960 card->spider_stats.rx_desc_error++;
966 skb_put(skb, descr->valid_size);
968 /* the card seems to add 2 bytes of junk in front
969 * of the ethernet frame */
970 #define SPIDER_MISALIGN 2
971 skb_pull(skb, SPIDER_MISALIGN);
972 skb->protocol = eth_type_trans(skb, netdev);
974 /* checksum offload */
975 if (card->options.rx_csum) {
976 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
977 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
978 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
979 skb->ip_summed = CHECKSUM_UNNECESSARY;
981 skb->ip_summed = CHECKSUM_NONE;
983 skb->ip_summed = CHECKSUM_NONE;
985 if (data_status & SPIDER_NET_VLAN_PACKET) {
986 /* further enhancements: HW-accel VLAN
987 * vlan_hwaccel_receive_skb
991 /* pass skb up to stack */
993 netif_receive_skb(skb);
997 /* update netdevice statistics */
998 card->netdev_stats.rx_packets++;
999 card->netdev_stats.rx_bytes += skb->len;
1005 * spider_net_decode_one_descr - processes an rx descriptor
1006 * @card: card structure
1007 * @napi: whether caller is in NAPI context
1009 * returns 1 if a packet has been sent to the stack, otherwise 0
1011 * processes an rx descriptor by iommu-unmapping the data buffer and passing
1012 * the packet up to the stack. This function is called in softirq
1013 * context, e.g. either bottom half from interrupt or NAPI polling context
1016 spider_net_decode_one_descr(struct spider_net_card *card, int napi)
1018 struct spider_net_descr_chain *chain = &card->rx_chain;
1019 struct spider_net_descr *descr = chain->tail;
1023 status = spider_net_get_descr_status(descr);
1025 if (status == SPIDER_NET_DESCR_CARDOWNED) {
1026 /* nothing in the descriptor yet */
1031 if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
1032 /* not initialized yet, the ring must be empty */
1033 spider_net_refill_rx_chain(card);
1034 spider_net_enable_rxdmac(card);
1039 /* descriptor definitively used -- move on tail */
1040 chain->tail = descr->next;
1043 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1044 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1045 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1046 if (netif_msg_rx_err(card))
1047 pr_err("%s: dropping RX descriptor with state %d\n",
1048 card->netdev->name, status);
1049 card->netdev_stats.rx_dropped++;
1050 pci_unmap_single(card->pdev, descr->buf_addr,
1051 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1052 dev_kfree_skb_irq(descr->skb);
1056 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1057 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1058 if (netif_msg_rx_err(card)) {
1059 pr_err("%s: RX descriptor with state %d\n",
1060 card->netdev->name, status);
1061 card->spider_stats.rx_desc_unk_state++;
1066 /* ok, we've got a packet in descr */
1067 result = spider_net_pass_skb_up(descr, card, napi);
1069 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1070 /* change the descriptor state: */
1072 spider_net_refill_rx_chain(card);
1078 * spider_net_poll - NAPI poll function called by the stack to return packets
1079 * @netdev: interface device structure
1080 * @budget: number of packets we can pass to the stack at most
1082 * returns 0 if no more packets available to the driver/stack. Returns 1,
1083 * if the quota is exceeded, but the driver has still packets.
1085 * spider_net_poll returns all packets from the rx descriptors to the stack
1086 * (using netif_receive_skb). If all/enough packets are up, the driver
1087 * reenables interrupts and returns 0. If not, 1 is returned.
1090 spider_net_poll(struct net_device *netdev, int *budget)
1092 struct spider_net_card *card = netdev_priv(netdev);
1093 int packets_to_do, packets_done = 0;
1094 int no_more_packets = 0;
1096 spider_net_cleanup_tx_ring(card);
1097 packets_to_do = min(*budget, netdev->quota);
1099 while (packets_to_do) {
1100 if (spider_net_decode_one_descr(card, 1)) {
1104 /* no more packets for the stack */
1105 no_more_packets = 1;
1110 netdev->quota -= packets_done;
1111 *budget -= packets_done;
1112 spider_net_refill_rx_chain(card);
1114 /* if all packets are in the stack, enable interrupts and return 0 */
1115 /* if not, return 1 */
1116 if (no_more_packets) {
1117 netif_rx_complete(netdev);
1118 spider_net_rx_irq_on(card);
1126 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1127 * @netdev: interface device structure
1128 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1131 spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1133 /* further enhancement... yet to do */
1138 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1139 * @netdev: interface device structure
1140 * @vid: VLAN id to add
1143 spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1145 /* further enhancement... yet to do */
1146 /* add vid to card's VLAN filter table */
1151 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1152 * @netdev: interface device structure
1153 * @vid: VLAN id to remove
1156 spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1158 /* further enhancement... yet to do */
1159 /* remove vid from card's VLAN filter table */
1163 * spider_net_get_stats - get interface statistics
1164 * @netdev: interface device structure
1166 * returns the interface statistics residing in the spider_net_card struct
1168 static struct net_device_stats *
1169 spider_net_get_stats(struct net_device *netdev)
1171 struct spider_net_card *card = netdev_priv(netdev);
1172 struct net_device_stats *stats = &card->netdev_stats;
1177 * spider_net_change_mtu - changes the MTU of an interface
1178 * @netdev: interface device structure
1179 * @new_mtu: new MTU value
1181 * returns 0 on success, <0 on failure
1184 spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1186 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1187 * and mtu is outbound only anyway */
1188 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1189 (new_mtu > SPIDER_NET_MAX_MTU) )
1191 netdev->mtu = new_mtu;
1196 * spider_net_set_mac - sets the MAC of an interface
1197 * @netdev: interface device structure
1198 * @ptr: pointer to new MAC address
1200 * Returns 0 on success, <0 on failure. Currently, we don't support this
1201 * and will always return EOPNOTSUPP.
1204 spider_net_set_mac(struct net_device *netdev, void *p)
1206 struct spider_net_card *card = netdev_priv(netdev);
1207 u32 macl, macu, regvalue;
1208 struct sockaddr *addr = p;
1210 if (!is_valid_ether_addr(addr->sa_data))
1211 return -EADDRNOTAVAIL;
1213 /* switch off GMACTPE and GMACRPE */
1214 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1215 regvalue &= ~((1 << 5) | (1 << 6));
1216 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1219 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1220 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1221 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1222 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1223 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1225 /* switch GMACTPE and GMACRPE back on */
1226 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1227 regvalue |= ((1 << 5) | (1 << 6));
1228 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1230 spider_net_set_promisc(card);
1232 /* look up, whether we have been successful */
1233 if (spider_net_get_mac_address(netdev))
1234 return -EADDRNOTAVAIL;
1235 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1236 return -EADDRNOTAVAIL;
1242 * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt
1243 * @card: card structure
1245 * spider_net_handle_rxram_full empties the RX ring so that spider can put
1246 * more packets in it and empty its RX RAM. This is called in bottom half
1250 spider_net_handle_rxram_full(struct spider_net_card *card)
1252 while (spider_net_decode_one_descr(card, 0))
1254 spider_net_enable_rxchtails(card);
1255 spider_net_enable_rxdmac(card);
1256 netif_rx_schedule(card->netdev);
1260 * spider_net_handle_error_irq - handles errors raised by an interrupt
1261 * @card: card structure
1262 * @status_reg: interrupt status register 0 (GHIINT0STS)
1264 * spider_net_handle_error_irq treats or ignores all error conditions
1265 * found when an interrupt is presented
1268 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1270 u32 error_reg1, error_reg2;
1274 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1275 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1277 /* check GHIINT0STS ************************************/
1279 for (i = 0; i < 32; i++)
1280 if (status_reg & (1<<i))
1283 /* let error_reg1 and error_reg2 evaluation decide, what to do
1284 case SPIDER_NET_PHYINT:
1285 case SPIDER_NET_GMAC2INT:
1286 case SPIDER_NET_GMAC1INT:
1287 case SPIDER_NET_GFIFOINT:
1288 case SPIDER_NET_DMACINT:
1289 case SPIDER_NET_GSYSINT:
1292 case SPIDER_NET_GIPSINT:
1296 case SPIDER_NET_GPWOPCMPINT:
1297 /* PHY write operation completed */
1300 case SPIDER_NET_GPROPCMPINT:
1301 /* PHY read operation completed */
1302 /* we don't use semaphores, as we poll for the completion
1303 * of the read operation in spider_net_read_phy. Should take
1307 case SPIDER_NET_GPWFFINT:
1308 /* PHY command queue full */
1309 if (netif_msg_intr(card))
1310 pr_err("PHY write queue full\n");
1314 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1315 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1316 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1318 case SPIDER_NET_GDTDEN0INT:
1319 /* someone has set TX_DMA_EN to 0 */
1323 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1324 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1325 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1326 case SPIDER_NET_GDADEN0INT:
1327 /* someone has set RX_DMA_EN to 0 */
1332 case SPIDER_NET_GDDFDCINT:
1333 case SPIDER_NET_GDCFDCINT:
1334 case SPIDER_NET_GDBFDCINT:
1335 case SPIDER_NET_GDAFDCINT:
1336 /* case SPIDER_NET_GDNMINT: not used. print a message */
1337 /* case SPIDER_NET_GCNMINT: not used. print a message */
1338 /* case SPIDER_NET_GBNMINT: not used. print a message */
1339 /* case SPIDER_NET_GANMINT: not used. print a message */
1340 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1345 case SPIDER_NET_GDTFDCINT:
1348 case SPIDER_NET_GTTEDINT:
1351 case SPIDER_NET_GDTDCEINT:
1352 /* chain end. If a descriptor should be sent, kick off
1354 if (card->tx_chain.tail != card->tx_chain.head)
1355 spider_net_kick_tx_dma(card);
1360 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1361 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1364 /* check GHIINT1STS ************************************/
1366 for (i = 0; i < 32; i++)
1367 if (error_reg1 & (1<<i))
1370 case SPIDER_NET_GTMFLLINT:
1371 if (netif_msg_intr(card) && net_ratelimit())
1372 pr_err("Spider TX RAM full\n");
1375 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1376 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1377 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1378 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1379 case SPIDER_NET_GRMFLLINT:
1380 if (netif_msg_intr(card) && net_ratelimit())
1381 pr_debug("Spider RX RAM full, incoming packets "
1382 "might be discarded!\n");
1383 spider_net_rx_irq_off(card);
1384 tasklet_schedule(&card->rxram_full_tl);
1388 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1389 case SPIDER_NET_GDTINVDINT:
1390 /* allrighty. tx from previous descr ok */
1395 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1396 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1397 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1398 case SPIDER_NET_GDADCEINT:
1399 if (netif_msg_intr(card))
1400 pr_err("got descriptor chain end interrupt, "
1401 "restarting DMAC %c.\n",
1402 'D'-(i-SPIDER_NET_GDDDCEINT)/3);
1403 spider_net_refill_rx_chain(card);
1404 spider_net_enable_rxdmac(card);
1408 /* invalid descriptor */
1409 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1410 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1411 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1412 case SPIDER_NET_GDAINVDINT:
1413 /* could happen when rx chain is full */
1414 spider_net_refill_rx_chain(card);
1415 spider_net_enable_rxdmac(card);
1419 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1420 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1421 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1422 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1423 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1424 /* case SPIDER_NET_GDSERINT: problem, print a message */
1425 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1426 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1427 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1428 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1429 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1435 /* check GHIINT2STS ************************************/
1437 for (i = 0; i < 32; i++)
1438 if (error_reg2 & (1<<i))
1441 /* there is nothing we can (want to) do at this time. Log a
1442 * message, we can switch on and off the specific values later on
1443 case SPIDER_NET_GPROPERINT:
1444 case SPIDER_NET_GMCTCRSNGINT:
1445 case SPIDER_NET_GMCTLCOLINT:
1446 case SPIDER_NET_GMCTTMOTINT:
1447 case SPIDER_NET_GMCRCAERINT:
1448 case SPIDER_NET_GMCRCALERINT:
1449 case SPIDER_NET_GMCRALNERINT:
1450 case SPIDER_NET_GMCROVRINT:
1451 case SPIDER_NET_GMCRRNTINT:
1452 case SPIDER_NET_GMCRRXERINT:
1453 case SPIDER_NET_GTITCSERINT:
1454 case SPIDER_NET_GTIFMTERINT:
1455 case SPIDER_NET_GTIPKTRVKINT:
1456 case SPIDER_NET_GTISPINGINT:
1457 case SPIDER_NET_GTISADNGINT:
1458 case SPIDER_NET_GTISPDNGINT:
1459 case SPIDER_NET_GRIFMTERINT:
1460 case SPIDER_NET_GRIPKTRVKINT:
1461 case SPIDER_NET_GRISPINGINT:
1462 case SPIDER_NET_GRISADNGINT:
1463 case SPIDER_NET_GRISPDNGINT:
1470 if ((show_error) && (netif_msg_intr(card)))
1471 pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, "
1472 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1474 status_reg, error_reg1, error_reg2);
1476 /* clear interrupt sources */
1477 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1478 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1482 * spider_net_interrupt - interrupt handler for spider_net
1483 * @irq: interupt number
1484 * @ptr: pointer to net_device
1485 * @regs: PU registers
1487 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1488 * interrupt found raised by card.
1490 * This is the interrupt handler, that turns off
1491 * interrupts for this device and makes the stack poll the driver
1494 spider_net_interrupt(int irq, void *ptr)
1496 struct net_device *netdev = ptr;
1497 struct spider_net_card *card = netdev_priv(netdev);
1500 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1505 if (status_reg & SPIDER_NET_RXINT ) {
1506 spider_net_rx_irq_off(card);
1507 netif_rx_schedule(netdev);
1509 if (status_reg & SPIDER_NET_TXINT)
1510 netif_rx_schedule(netdev);
1512 if (status_reg & SPIDER_NET_ERRINT )
1513 spider_net_handle_error_irq(card, status_reg);
1515 /* clear interrupt sources */
1516 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1521 #ifdef CONFIG_NET_POLL_CONTROLLER
1523 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1524 * @netdev: interface device structure
1526 * see Documentation/networking/netconsole.txt
1529 spider_net_poll_controller(struct net_device *netdev)
1531 disable_irq(netdev->irq);
1532 spider_net_interrupt(netdev->irq, netdev);
1533 enable_irq(netdev->irq);
1535 #endif /* CONFIG_NET_POLL_CONTROLLER */
1538 * spider_net_init_card - initializes the card
1539 * @card: card structure
1541 * spider_net_init_card initializes the card so that other registers can
1545 spider_net_init_card(struct spider_net_card *card)
1547 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1548 SPIDER_NET_CKRCTRL_STOP_VALUE);
1550 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1551 SPIDER_NET_CKRCTRL_RUN_VALUE);
1555 * spider_net_enable_card - enables the card by setting all kinds of regs
1556 * @card: card structure
1558 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1561 spider_net_enable_card(struct spider_net_card *card)
1564 /* the following array consists of (register),(value) pairs
1565 * that are set in this function. A register of 0 ends the list */
1567 { SPIDER_NET_GRESUMINTNUM, 0 },
1568 { SPIDER_NET_GREINTNUM, 0 },
1570 /* set interrupt frame number registers */
1571 /* clear the single DMA engine registers first */
1572 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1573 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1574 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1575 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1576 /* then set, what we really need */
1577 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1579 /* timer counter registers and stuff */
1580 { SPIDER_NET_GFREECNNUM, 0 },
1581 { SPIDER_NET_GONETIMENUM, 0 },
1582 { SPIDER_NET_GTOUTFRMNUM, 0 },
1584 /* RX mode setting */
1585 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1586 /* TX mode setting */
1587 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1588 /* IPSEC mode setting */
1589 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1591 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1593 { SPIDER_NET_GMRWOLCTRL, 0 },
1594 { SPIDER_NET_GTESTMD, 0x10000000 },
1595 { SPIDER_NET_GTTQMSK, 0x00400040 },
1597 { SPIDER_NET_GMACINTEN, 0 },
1599 /* flow control stuff */
1600 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1601 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1603 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1608 while (regs[i][0]) {
1609 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1613 /* clear unicast filter table entries 1 to 14 */
1614 for (i = 1; i <= 14; i++) {
1615 spider_net_write_reg(card,
1616 SPIDER_NET_GMRUAFILnR + i * 8,
1618 spider_net_write_reg(card,
1619 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1623 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1625 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1627 /* set chain tail adress for RX chains and
1629 spider_net_enable_rxchtails(card);
1630 spider_net_enable_rxdmac(card);
1632 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1634 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1635 SPIDER_NET_LENLMT_VALUE);
1636 spider_net_write_reg(card, SPIDER_NET_GMACMODE,
1637 SPIDER_NET_MACMODE_VALUE);
1638 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1639 SPIDER_NET_OPMODE_VALUE);
1641 /* set interrupt mask registers */
1642 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1643 SPIDER_NET_INT0_MASK_VALUE);
1644 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1645 SPIDER_NET_INT1_MASK_VALUE);
1646 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1647 SPIDER_NET_INT2_MASK_VALUE);
1649 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1650 SPIDER_NET_GDTBSTA | SPIDER_NET_GDTDCEIDIS);
1654 * spider_net_open - called upon ifonfig up
1655 * @netdev: interface device structure
1657 * returns 0 on success, <0 on failure
1659 * spider_net_open allocates all the descriptors and memory needed for
1660 * operation, sets up multicast list and enables interrupts
1663 spider_net_open(struct net_device *netdev)
1665 struct spider_net_card *card = netdev_priv(netdev);
1669 if (spider_net_init_chain(card, &card->tx_chain, card->descr,
1670 PCI_DMA_TODEVICE, card->tx_desc))
1671 goto alloc_tx_failed;
1673 card->low_watermark = NULL;
1675 /* rx_chain is after tx_chain, so offset is descr + tx_count */
1676 if (spider_net_init_chain(card, &card->rx_chain,
1677 card->descr + card->tx_desc,
1678 PCI_DMA_FROMDEVICE, card->rx_desc))
1679 goto alloc_rx_failed;
1681 /* allocate rx skbs */
1682 if (spider_net_alloc_rx_skbs(card))
1683 goto alloc_skbs_failed;
1685 spider_net_set_multi(netdev);
1687 /* further enhancement: setup hw vlan, if needed */
1690 if (request_irq(netdev->irq, spider_net_interrupt,
1691 IRQF_SHARED, netdev->name, netdev))
1692 goto register_int_failed;
1694 spider_net_enable_card(card);
1696 netif_start_queue(netdev);
1697 netif_carrier_on(netdev);
1698 netif_poll_enable(netdev);
1702 register_int_failed:
1703 spider_net_free_rx_chain_contents(card);
1705 spider_net_free_chain(card, &card->rx_chain);
1707 spider_net_free_chain(card, &card->tx_chain);
1713 * spider_net_setup_phy - setup PHY
1714 * @card: card structure
1716 * returns 0 on success, <0 on failure
1718 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1719 * the PHY to 1000 Mbps
1722 spider_net_setup_phy(struct spider_net_card *card)
1724 struct mii_phy *phy = &card->phy;
1726 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1727 SPIDER_NET_DMASEL_VALUE);
1728 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1729 SPIDER_NET_PHY_CTRL_VALUE);
1731 phy->dev = card->netdev;
1732 phy->mdio_read = spider_net_read_phy;
1733 phy->mdio_write = spider_net_write_phy;
1735 mii_phy_probe(phy, phy->mii_id);
1737 if (phy->def->ops->setup_forced)
1738 phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
1740 phy->def->ops->enable_fiber(phy);
1742 phy->def->ops->read_link(phy);
1743 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
1744 phy->speed, phy->duplex==1 ? "Full" : "Half");
1750 * spider_net_download_firmware - loads firmware into the adapter
1751 * @card: card structure
1752 * @firmware_ptr: pointer to firmware data
1754 * spider_net_download_firmware loads the firmware data into the
1755 * adapter. It assumes the length etc. to be allright.
1758 spider_net_download_firmware(struct spider_net_card *card,
1759 const void *firmware_ptr)
1762 const u32 *fw_ptr = firmware_ptr;
1764 /* stop sequencers */
1765 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1766 SPIDER_NET_STOP_SEQ_VALUE);
1768 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1770 spider_net_write_reg(card,
1771 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1772 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1773 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1774 sequencer * 8, *fw_ptr);
1779 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1782 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1783 SPIDER_NET_RUN_SEQ_VALUE);
1789 * spider_net_init_firmware - reads in firmware parts
1790 * @card: card structure
1792 * Returns 0 on success, <0 on failure
1794 * spider_net_init_firmware opens the sequencer firmware and does some basic
1795 * checks. This function opens and releases the firmware structure. A call
1796 * to download the firmware is performed before the release.
1800 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1801 * the program for each sequencer. Use the command
1802 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1803 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1804 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1806 * to generate spider_fw.bin, if you have sequencer programs with something
1807 * like the following contents for each sequencer:
1808 * <ONE LINE COMMENT>
1809 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1810 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1812 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1815 spider_net_init_firmware(struct spider_net_card *card)
1817 struct firmware *firmware = NULL;
1818 struct device_node *dn;
1819 const u8 *fw_prop = NULL;
1823 if (request_firmware((const struct firmware **)&firmware,
1824 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1825 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1826 netif_msg_probe(card) ) {
1827 pr_err("Incorrect size of spidernet firmware in " \
1828 "filesystem. Looking in host firmware...\n");
1831 err = spider_net_download_firmware(card, firmware->data);
1833 release_firmware(firmware);
1841 dn = pci_device_to_OF_node(card->pdev);
1845 fw_prop = get_property(dn, "firmware", &fw_size);
1849 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1850 netif_msg_probe(card) ) {
1851 pr_err("Incorrect size of spidernet firmware in " \
1856 err = spider_net_download_firmware(card, fw_prop);
1861 if (netif_msg_probe(card))
1862 pr_err("Couldn't find spidernet firmware in filesystem " \
1863 "or host firmware\n");
1868 * spider_net_workaround_rxramfull - work around firmware bug
1869 * @card: card structure
1874 spider_net_workaround_rxramfull(struct spider_net_card *card)
1876 int i, sequencer = 0;
1879 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1880 SPIDER_NET_CKRCTRL_RUN_VALUE);
1882 /* empty sequencer data */
1883 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1885 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
1886 sequencer * 8, 0x0);
1887 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1888 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1889 sequencer * 8, 0x0);
1893 /* set sequencer operation */
1894 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
1897 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1898 SPIDER_NET_CKRCTRL_STOP_VALUE);
1902 * spider_net_stop - called upon ifconfig down
1903 * @netdev: interface device structure
1908 spider_net_stop(struct net_device *netdev)
1910 struct spider_net_card *card = netdev_priv(netdev);
1912 tasklet_kill(&card->rxram_full_tl);
1913 netif_poll_disable(netdev);
1914 netif_carrier_off(netdev);
1915 netif_stop_queue(netdev);
1916 del_timer_sync(&card->tx_timer);
1918 /* disable/mask all interrupts */
1919 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1920 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1921 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1923 /* free_irq(netdev->irq, netdev);*/
1924 free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
1926 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1927 SPIDER_NET_DMA_TX_FEND_VALUE);
1929 /* turn off DMA, force end */
1930 spider_net_disable_rxdmac(card);
1932 /* release chains */
1933 if (spin_trylock(&card->tx_chain.lock)) {
1934 spider_net_release_tx_chain(card, 1);
1935 spin_unlock(&card->tx_chain.lock);
1938 spider_net_free_chain(card, &card->tx_chain);
1939 spider_net_free_chain(card, &card->rx_chain);
1945 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1946 * function (to be called not under interrupt status)
1947 * @data: data, is interface device structure
1949 * called as task when tx hangs, resets interface (if interface is up)
1952 spider_net_tx_timeout_task(void *data)
1954 struct net_device *netdev = data;
1955 struct spider_net_card *card = netdev_priv(netdev);
1957 if (!(netdev->flags & IFF_UP))
1960 netif_device_detach(netdev);
1961 spider_net_stop(netdev);
1963 spider_net_workaround_rxramfull(card);
1964 spider_net_init_card(card);
1966 if (spider_net_setup_phy(card))
1968 if (spider_net_init_firmware(card))
1971 spider_net_open(netdev);
1972 spider_net_kick_tx_dma(card);
1973 netif_device_attach(netdev);
1976 atomic_dec(&card->tx_timeout_task_counter);
1980 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1981 * @netdev: interface device structure
1983 * called, if tx hangs. Schedules a task that resets the interface
1986 spider_net_tx_timeout(struct net_device *netdev)
1988 struct spider_net_card *card;
1990 card = netdev_priv(netdev);
1991 atomic_inc(&card->tx_timeout_task_counter);
1992 if (netdev->flags & IFF_UP)
1993 schedule_work(&card->tx_timeout_task);
1995 atomic_dec(&card->tx_timeout_task_counter);
1996 card->spider_stats.tx_timeouts++;
2000 * spider_net_setup_netdev_ops - initialization of net_device operations
2001 * @netdev: net_device structure
2003 * fills out function pointers in the net_device structure
2006 spider_net_setup_netdev_ops(struct net_device *netdev)
2008 netdev->open = &spider_net_open;
2009 netdev->stop = &spider_net_stop;
2010 netdev->hard_start_xmit = &spider_net_xmit;
2011 netdev->get_stats = &spider_net_get_stats;
2012 netdev->set_multicast_list = &spider_net_set_multi;
2013 netdev->set_mac_address = &spider_net_set_mac;
2014 netdev->change_mtu = &spider_net_change_mtu;
2015 netdev->do_ioctl = &spider_net_do_ioctl;
2017 netdev->tx_timeout = &spider_net_tx_timeout;
2018 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2020 netdev->poll = &spider_net_poll;
2021 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
2023 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
2024 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
2025 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
2026 #ifdef CONFIG_NET_POLL_CONTROLLER
2027 /* poll controller */
2028 netdev->poll_controller = &spider_net_poll_controller;
2029 #endif /* CONFIG_NET_POLL_CONTROLLER */
2031 netdev->ethtool_ops = &spider_net_ethtool_ops;
2035 * spider_net_setup_netdev - initialization of net_device
2036 * @card: card structure
2038 * Returns 0 on success or <0 on failure
2040 * spider_net_setup_netdev initializes the net_device structure
2043 spider_net_setup_netdev(struct spider_net_card *card)
2046 struct net_device *netdev = card->netdev;
2047 struct device_node *dn;
2048 struct sockaddr addr;
2051 SET_MODULE_OWNER(netdev);
2052 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2054 pci_set_drvdata(card->pdev, netdev);
2056 card->rxram_full_tl.data = (unsigned long) card;
2057 card->rxram_full_tl.func =
2058 (void (*)(unsigned long)) spider_net_handle_rxram_full;
2059 init_timer(&card->tx_timer);
2060 card->tx_timer.function =
2061 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2062 card->tx_timer.data = (unsigned long) card;
2063 netdev->irq = card->pdev->irq;
2065 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2067 card->tx_desc = tx_descriptors;
2068 card->rx_desc = rx_descriptors;
2070 spider_net_setup_netdev_ops(netdev);
2072 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
2073 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2074 * NETIF_F_HW_VLAN_FILTER */
2076 netdev->irq = card->pdev->irq;
2078 dn = pci_device_to_OF_node(card->pdev);
2082 mac = get_property(dn, "local-mac-address", NULL);
2085 memcpy(addr.sa_data, mac, ETH_ALEN);
2087 result = spider_net_set_mac(netdev, &addr);
2088 if ((result) && (netif_msg_probe(card)))
2089 pr_err("Failed to set MAC address: %i\n", result);
2091 result = register_netdev(netdev);
2093 if (netif_msg_probe(card))
2094 pr_err("Couldn't register net_device: %i\n",
2099 if (netif_msg_probe(card))
2100 pr_info("Initialized device %s.\n", netdev->name);
2106 * spider_net_alloc_card - allocates net_device and card structure
2108 * returns the card structure or NULL in case of errors
2110 * the card and net_device structures are linked to each other
2112 static struct spider_net_card *
2113 spider_net_alloc_card(void)
2115 struct net_device *netdev;
2116 struct spider_net_card *card;
2119 alloc_size = sizeof (*card) +
2120 sizeof (struct spider_net_descr) * rx_descriptors +
2121 sizeof (struct spider_net_descr) * tx_descriptors;
2122 netdev = alloc_etherdev(alloc_size);
2126 card = netdev_priv(netdev);
2127 card->netdev = netdev;
2128 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2129 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev);
2130 init_waitqueue_head(&card->waitq);
2131 atomic_set(&card->tx_timeout_task_counter, 0);
2137 * spider_net_undo_pci_setup - releases PCI ressources
2138 * @card: card structure
2140 * spider_net_undo_pci_setup releases the mapped regions
2143 spider_net_undo_pci_setup(struct spider_net_card *card)
2145 iounmap(card->regs);
2146 pci_release_regions(card->pdev);
2150 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2151 * @card: card structure
2154 * Returns the card structure or NULL if any errors occur
2156 * spider_net_setup_pci_dev initializes pdev and together with the
2157 * functions called in spider_net_open configures the device so that
2158 * data can be transferred over it
2159 * The net_device structure is attached to the card structure, if the
2160 * function returns without error.
2162 static struct spider_net_card *
2163 spider_net_setup_pci_dev(struct pci_dev *pdev)
2165 struct spider_net_card *card;
2166 unsigned long mmio_start, mmio_len;
2168 if (pci_enable_device(pdev)) {
2169 pr_err("Couldn't enable PCI device\n");
2173 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2174 pr_err("Couldn't find proper PCI device base address.\n");
2175 goto out_disable_dev;
2178 if (pci_request_regions(pdev, spider_net_driver_name)) {
2179 pr_err("Couldn't obtain PCI resources, aborting.\n");
2180 goto out_disable_dev;
2183 pci_set_master(pdev);
2185 card = spider_net_alloc_card();
2187 pr_err("Couldn't allocate net_device structure, "
2189 goto out_release_regions;
2193 /* fetch base address and length of first resource */
2194 mmio_start = pci_resource_start(pdev, 0);
2195 mmio_len = pci_resource_len(pdev, 0);
2197 card->netdev->mem_start = mmio_start;
2198 card->netdev->mem_end = mmio_start + mmio_len;
2199 card->regs = ioremap(mmio_start, mmio_len);
2202 pr_err("Couldn't obtain PCI resources, aborting.\n");
2203 goto out_release_regions;
2208 out_release_regions:
2209 pci_release_regions(pdev);
2211 pci_disable_device(pdev);
2212 pci_set_drvdata(pdev, NULL);
2217 * spider_net_probe - initialization of a device
2219 * @ent: entry in the device id list
2221 * Returns 0 on success, <0 on failure
2223 * spider_net_probe initializes pdev and registers a net_device
2224 * structure for it. After that, the device can be ifconfig'ed up
2226 static int __devinit
2227 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2230 struct spider_net_card *card;
2232 card = spider_net_setup_pci_dev(pdev);
2236 spider_net_workaround_rxramfull(card);
2237 spider_net_init_card(card);
2239 err = spider_net_setup_phy(card);
2243 err = spider_net_init_firmware(card);
2247 err = spider_net_setup_netdev(card);
2254 spider_net_undo_pci_setup(card);
2255 free_netdev(card->netdev);
2261 * spider_net_remove - removal of a device
2264 * Returns 0 on success, <0 on failure
2266 * spider_net_remove is called to remove the device and unregisters the
2269 static void __devexit
2270 spider_net_remove(struct pci_dev *pdev)
2272 struct net_device *netdev;
2273 struct spider_net_card *card;
2275 netdev = pci_get_drvdata(pdev);
2276 card = netdev_priv(netdev);
2278 wait_event(card->waitq,
2279 atomic_read(&card->tx_timeout_task_counter) == 0);
2281 unregister_netdev(netdev);
2283 /* switch off card */
2284 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2285 SPIDER_NET_CKRCTRL_STOP_VALUE);
2286 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2287 SPIDER_NET_CKRCTRL_RUN_VALUE);
2289 spider_net_undo_pci_setup(card);
2290 free_netdev(netdev);
2293 static struct pci_driver spider_net_driver = {
2294 .name = spider_net_driver_name,
2295 .id_table = spider_net_pci_tbl,
2296 .probe = spider_net_probe,
2297 .remove = __devexit_p(spider_net_remove)
2301 * spider_net_init - init function when the driver is loaded
2303 * spider_net_init registers the device driver
2305 static int __init spider_net_init(void)
2307 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2309 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2310 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2311 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2313 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2314 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2315 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2317 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2318 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2319 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2321 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2322 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2323 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2326 return pci_register_driver(&spider_net_driver);
2330 * spider_net_cleanup - exit function when driver is unloaded
2332 * spider_net_cleanup unregisters the device driver
2334 static void __exit spider_net_cleanup(void)
2336 pci_unregister_driver(&spider_net_driver);
2339 module_init(spider_net_init);
2340 module_exit(spider_net_cleanup);