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, 0644);
64 module_param(tx_descriptors, int, 0644);
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;
652 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
653 if (pci_dma_mapping_error(buf)) {
654 if (netif_msg_tx_err(card) && net_ratelimit())
655 pr_err("could not iommu-map packet (%p, %i). "
656 "Dropping packet\n", skb->data, skb->len);
657 card->spider_stats.tx_iommu_map_error++;
661 descr->buf_addr = buf;
662 descr->buf_size = skb->len;
663 descr->next_descr_addr = 0;
665 descr->data_status = 0;
667 descr->dmac_cmd_status =
668 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
669 if (skb->protocol == htons(ETH_P_IP))
670 switch (skb->nh.iph->protocol) {
672 descr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
675 descr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
679 descr->prev->next_descr_addr = descr->bus_addr;
685 * spider_net_release_tx_descr - processes a used tx descriptor
686 * @card: card structure
687 * @descr: descriptor to release
689 * releases a used tx descriptor (unmapping, freeing of skb)
692 spider_net_release_tx_descr(struct spider_net_card *card)
694 struct spider_net_descr *descr = card->tx_chain.tail;
697 card->tx_chain.tail = card->tx_chain.tail->next;
698 descr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
702 pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
704 dev_kfree_skb_any(skb);
708 * spider_net_release_tx_chain - processes sent tx descriptors
709 * @card: adapter structure
710 * @brutal: if set, don't care about whether descriptor seems to be in use
712 * returns 0 if the tx ring is empty, otherwise 1.
714 * spider_net_release_tx_chain releases the tx descriptors that spider has
715 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
716 * If some other context is calling this function, we return 1 so that we're
717 * scheduled again (if we were scheduled) and will not loose initiative.
720 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
722 struct spider_net_descr_chain *chain = &card->tx_chain;
725 spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR);
727 while (chain->tail != chain->head) {
728 status = spider_net_get_descr_status(chain->tail);
730 case SPIDER_NET_DESCR_COMPLETE:
731 card->netdev_stats.tx_packets++;
732 card->netdev_stats.tx_bytes += chain->tail->skb->len;
735 case SPIDER_NET_DESCR_CARDOWNED:
738 /* fallthrough, if we release the descriptors
739 * brutally (then we don't care about
740 * SPIDER_NET_DESCR_CARDOWNED) */
742 case SPIDER_NET_DESCR_RESPONSE_ERROR:
743 case SPIDER_NET_DESCR_PROTECTION_ERROR:
744 case SPIDER_NET_DESCR_FORCE_END:
745 if (netif_msg_tx_err(card))
746 pr_err("%s: forcing end of tx descriptor "
747 "with status x%02x\n",
748 card->netdev->name, status);
749 card->netdev_stats.tx_errors++;
753 card->netdev_stats.tx_dropped++;
756 spider_net_release_tx_descr(card);
763 * spider_net_kick_tx_dma - enables TX DMA processing
764 * @card: card structure
765 * @descr: descriptor address to enable TX processing at
767 * spider_net_kick_tx_dma writes the current tx chain head as start address
768 * of the tx descriptor chain and enables the transmission DMA engine
771 spider_net_kick_tx_dma(struct spider_net_card *card)
773 struct spider_net_descr *descr;
775 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
776 SPIDER_NET_TX_DMA_EN)
779 descr = card->tx_chain.tail;
781 if (spider_net_get_descr_status(descr) ==
782 SPIDER_NET_DESCR_CARDOWNED) {
783 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
785 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
786 SPIDER_NET_DMA_TX_VALUE);
789 if (descr == card->tx_chain.head)
795 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
799 * spider_net_xmit - transmits a frame over the device
800 * @skb: packet to send out
801 * @netdev: interface device structure
803 * returns 0 on success, !0 on failure
806 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
808 struct spider_net_card *card = netdev_priv(netdev);
809 struct spider_net_descr_chain *chain = &card->tx_chain;
810 struct spider_net_descr *descr = chain->head;
814 spin_lock_irqsave(&chain->lock, flags);
816 spider_net_release_tx_chain(card, 0);
818 if (chain->head->next == chain->tail->prev) {
819 card->netdev_stats.tx_dropped++;
820 result = NETDEV_TX_LOCKED;
824 if (spider_net_get_descr_status(descr) != SPIDER_NET_DESCR_NOT_IN_USE) {
825 card->netdev_stats.tx_dropped++;
826 result = NETDEV_TX_LOCKED;
830 if (spider_net_prepare_tx_descr(card, skb) != 0) {
831 card->netdev_stats.tx_dropped++;
832 result = NETDEV_TX_BUSY;
836 result = NETDEV_TX_OK;
838 spider_net_kick_tx_dma(card);
839 card->tx_chain.head = card->tx_chain.head->next;
842 spin_unlock_irqrestore(&chain->lock, flags);
843 netif_wake_queue(netdev);
848 * spider_net_cleanup_tx_ring - cleans up the TX ring
849 * @card: card structure
851 * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
852 * interrupts to cleanup our TX ring) and returns sent packets to the stack
856 spider_net_cleanup_tx_ring(struct spider_net_card *card)
860 spin_lock_irqsave(&card->tx_chain.lock, flags);
862 if ((spider_net_release_tx_chain(card, 0) != 0) &&
863 (card->netdev->flags & IFF_UP))
864 spider_net_kick_tx_dma(card);
866 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
870 * spider_net_do_ioctl - called for device ioctls
871 * @netdev: interface device structure
872 * @ifr: request parameter structure for ioctl
873 * @cmd: command code for ioctl
875 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
876 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
879 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
888 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
889 * @descr: descriptor to process
890 * @card: card structure
891 * @napi: whether caller is in NAPI context
893 * returns 1 on success, 0 if no packet was passed to the stack
895 * iommu-unmaps the skb, fills out skb structure and passes the data to the
896 * stack. The descriptor state is not changed.
899 spider_net_pass_skb_up(struct spider_net_descr *descr,
900 struct spider_net_card *card, int napi)
903 struct net_device *netdev;
904 u32 data_status, data_error;
906 data_status = descr->data_status;
907 data_error = descr->data_error;
909 netdev = card->netdev;
911 /* unmap descriptor */
912 pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME,
915 /* the cases we'll throw away the packet immediately */
916 if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
917 if (netif_msg_rx_err(card))
918 pr_err("error in received descriptor found, "
919 "data_status=x%08x, data_error=x%08x\n",
920 data_status, data_error);
921 card->spider_stats.rx_desc_error++;
927 skb_put(skb, descr->valid_size);
929 /* the card seems to add 2 bytes of junk in front
930 * of the ethernet frame */
931 #define SPIDER_MISALIGN 2
932 skb_pull(skb, SPIDER_MISALIGN);
933 skb->protocol = eth_type_trans(skb, netdev);
935 /* checksum offload */
936 if (card->options.rx_csum) {
937 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
938 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
939 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
940 skb->ip_summed = CHECKSUM_UNNECESSARY;
942 skb->ip_summed = CHECKSUM_NONE;
944 skb->ip_summed = CHECKSUM_NONE;
946 if (data_status & SPIDER_NET_VLAN_PACKET) {
947 /* further enhancements: HW-accel VLAN
948 * vlan_hwaccel_receive_skb
952 /* pass skb up to stack */
954 netif_receive_skb(skb);
958 /* update netdevice statistics */
959 card->netdev_stats.rx_packets++;
960 card->netdev_stats.rx_bytes += skb->len;
966 * spider_net_decode_one_descr - processes an rx descriptor
967 * @card: card structure
968 * @napi: whether caller is in NAPI context
970 * returns 1 if a packet has been sent to the stack, otherwise 0
972 * processes an rx descriptor by iommu-unmapping the data buffer and passing
973 * the packet up to the stack. This function is called in softirq
974 * context, e.g. either bottom half from interrupt or NAPI polling context
977 spider_net_decode_one_descr(struct spider_net_card *card, int napi)
979 struct spider_net_descr_chain *chain = &card->rx_chain;
980 struct spider_net_descr *descr = chain->tail;
984 status = spider_net_get_descr_status(descr);
986 if (status == SPIDER_NET_DESCR_CARDOWNED) {
987 /* nothing in the descriptor yet */
992 if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
993 /* not initialized yet, the ring must be empty */
994 spider_net_refill_rx_chain(card);
995 spider_net_enable_rxdmac(card);
1000 /* descriptor definitively used -- move on tail */
1001 chain->tail = descr->next;
1004 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1005 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1006 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1007 if (netif_msg_rx_err(card))
1008 pr_err("%s: dropping RX descriptor with state %d\n",
1009 card->netdev->name, status);
1010 card->netdev_stats.rx_dropped++;
1011 pci_unmap_single(card->pdev, descr->buf_addr,
1012 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1013 dev_kfree_skb_irq(descr->skb);
1017 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1018 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1019 if (netif_msg_rx_err(card)) {
1020 pr_err("%s: RX descriptor with state %d\n",
1021 card->netdev->name, status);
1022 card->spider_stats.rx_desc_unk_state++;
1027 /* ok, we've got a packet in descr */
1028 result = spider_net_pass_skb_up(descr, card, napi);
1030 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1031 /* change the descriptor state: */
1033 spider_net_refill_rx_chain(card);
1039 * spider_net_poll - NAPI poll function called by the stack to return packets
1040 * @netdev: interface device structure
1041 * @budget: number of packets we can pass to the stack at most
1043 * returns 0 if no more packets available to the driver/stack. Returns 1,
1044 * if the quota is exceeded, but the driver has still packets.
1046 * spider_net_poll returns all packets from the rx descriptors to the stack
1047 * (using netif_receive_skb). If all/enough packets are up, the driver
1048 * reenables interrupts and returns 0. If not, 1 is returned.
1051 spider_net_poll(struct net_device *netdev, int *budget)
1053 struct spider_net_card *card = netdev_priv(netdev);
1054 int packets_to_do, packets_done = 0;
1055 int no_more_packets = 0;
1057 packets_to_do = min(*budget, netdev->quota);
1059 while (packets_to_do) {
1060 if (spider_net_decode_one_descr(card, 1)) {
1064 /* no more packets for the stack */
1065 no_more_packets = 1;
1070 netdev->quota -= packets_done;
1071 *budget -= packets_done;
1072 spider_net_refill_rx_chain(card);
1074 /* if all packets are in the stack, enable interrupts and return 0 */
1075 /* if not, return 1 */
1076 if (no_more_packets) {
1077 netif_rx_complete(netdev);
1078 spider_net_rx_irq_on(card);
1086 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1087 * @netdev: interface device structure
1088 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1091 spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1093 /* further enhancement... yet to do */
1098 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1099 * @netdev: interface device structure
1100 * @vid: VLAN id to add
1103 spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1105 /* further enhancement... yet to do */
1106 /* add vid to card's VLAN filter table */
1111 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1112 * @netdev: interface device structure
1113 * @vid: VLAN id to remove
1116 spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1118 /* further enhancement... yet to do */
1119 /* remove vid from card's VLAN filter table */
1123 * spider_net_get_stats - get interface statistics
1124 * @netdev: interface device structure
1126 * returns the interface statistics residing in the spider_net_card struct
1128 static struct net_device_stats *
1129 spider_net_get_stats(struct net_device *netdev)
1131 struct spider_net_card *card = netdev_priv(netdev);
1132 struct net_device_stats *stats = &card->netdev_stats;
1137 * spider_net_change_mtu - changes the MTU of an interface
1138 * @netdev: interface device structure
1139 * @new_mtu: new MTU value
1141 * returns 0 on success, <0 on failure
1144 spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1146 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1147 * and mtu is outbound only anyway */
1148 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1149 (new_mtu > SPIDER_NET_MAX_MTU) )
1151 netdev->mtu = new_mtu;
1156 * spider_net_set_mac - sets the MAC of an interface
1157 * @netdev: interface device structure
1158 * @ptr: pointer to new MAC address
1160 * Returns 0 on success, <0 on failure. Currently, we don't support this
1161 * and will always return EOPNOTSUPP.
1164 spider_net_set_mac(struct net_device *netdev, void *p)
1166 struct spider_net_card *card = netdev_priv(netdev);
1167 u32 macl, macu, regvalue;
1168 struct sockaddr *addr = p;
1170 if (!is_valid_ether_addr(addr->sa_data))
1171 return -EADDRNOTAVAIL;
1173 /* switch off GMACTPE and GMACRPE */
1174 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1175 regvalue &= ~((1 << 5) | (1 << 6));
1176 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1179 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1180 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1181 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1182 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1183 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1185 /* switch GMACTPE and GMACRPE back on */
1186 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1187 regvalue |= ((1 << 5) | (1 << 6));
1188 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1190 spider_net_set_promisc(card);
1192 /* look up, whether we have been successful */
1193 if (spider_net_get_mac_address(netdev))
1194 return -EADDRNOTAVAIL;
1195 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1196 return -EADDRNOTAVAIL;
1202 * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt
1203 * @card: card structure
1205 * spider_net_handle_rxram_full empties the RX ring so that spider can put
1206 * more packets in it and empty its RX RAM. This is called in bottom half
1210 spider_net_handle_rxram_full(struct spider_net_card *card)
1212 while (spider_net_decode_one_descr(card, 0))
1214 spider_net_enable_rxchtails(card);
1215 spider_net_enable_rxdmac(card);
1216 netif_rx_schedule(card->netdev);
1220 * spider_net_handle_error_irq - handles errors raised by an interrupt
1221 * @card: card structure
1222 * @status_reg: interrupt status register 0 (GHIINT0STS)
1224 * spider_net_handle_error_irq treats or ignores all error conditions
1225 * found when an interrupt is presented
1228 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1230 u32 error_reg1, error_reg2;
1234 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1235 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1237 /* check GHIINT0STS ************************************/
1239 for (i = 0; i < 32; i++)
1240 if (status_reg & (1<<i))
1243 /* let error_reg1 and error_reg2 evaluation decide, what to do
1244 case SPIDER_NET_PHYINT:
1245 case SPIDER_NET_GMAC2INT:
1246 case SPIDER_NET_GMAC1INT:
1247 case SPIDER_NET_GIPSINT:
1248 case SPIDER_NET_GFIFOINT:
1249 case SPIDER_NET_DMACINT:
1250 case SPIDER_NET_GSYSINT:
1253 case SPIDER_NET_GPWOPCMPINT:
1254 /* PHY write operation completed */
1257 case SPIDER_NET_GPROPCMPINT:
1258 /* PHY read operation completed */
1259 /* we don't use semaphores, as we poll for the completion
1260 * of the read operation in spider_net_read_phy. Should take
1264 case SPIDER_NET_GPWFFINT:
1265 /* PHY command queue full */
1266 if (netif_msg_intr(card))
1267 pr_err("PHY write queue full\n");
1271 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1272 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1273 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1275 case SPIDER_NET_GDTDEN0INT:
1276 /* someone has set TX_DMA_EN to 0 */
1280 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1281 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1282 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1283 case SPIDER_NET_GDADEN0INT:
1284 /* someone has set RX_DMA_EN to 0 */
1289 case SPIDER_NET_GDDFDCINT:
1290 case SPIDER_NET_GDCFDCINT:
1291 case SPIDER_NET_GDBFDCINT:
1292 case SPIDER_NET_GDAFDCINT:
1293 /* case SPIDER_NET_GDNMINT: not used. print a message */
1294 /* case SPIDER_NET_GCNMINT: not used. print a message */
1295 /* case SPIDER_NET_GBNMINT: not used. print a message */
1296 /* case SPIDER_NET_GANMINT: not used. print a message */
1297 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1302 case SPIDER_NET_GDTFDCINT:
1305 case SPIDER_NET_GTTEDINT:
1308 case SPIDER_NET_GDTDCEINT:
1309 /* chain end. If a descriptor should be sent, kick off
1311 if (card->tx_chain.tail == card->tx_chain.head)
1312 spider_net_kick_tx_dma(card);
1316 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1317 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1320 /* check GHIINT1STS ************************************/
1322 for (i = 0; i < 32; i++)
1323 if (error_reg1 & (1<<i))
1326 case SPIDER_NET_GTMFLLINT:
1327 if (netif_msg_intr(card) && net_ratelimit())
1328 pr_err("Spider TX RAM full\n");
1331 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1332 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1333 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1334 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1335 case SPIDER_NET_GRMFLLINT:
1336 if (netif_msg_intr(card) && net_ratelimit())
1337 pr_debug("Spider RX RAM full, incoming packets "
1338 "might be discarded!\n");
1339 spider_net_rx_irq_off(card);
1340 tasklet_schedule(&card->rxram_full_tl);
1344 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1345 case SPIDER_NET_GDTINVDINT:
1346 /* allrighty. tx from previous descr ok */
1351 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1352 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1353 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1354 case SPIDER_NET_GDADCEINT:
1355 if (netif_msg_intr(card))
1356 pr_err("got descriptor chain end interrupt, "
1357 "restarting DMAC %c.\n",
1358 'D'+i-SPIDER_NET_GDDDCEINT);
1359 spider_net_refill_rx_chain(card);
1360 spider_net_enable_rxdmac(card);
1364 /* invalid descriptor */
1365 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1366 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1367 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1368 case SPIDER_NET_GDAINVDINT:
1369 /* could happen when rx chain is full */
1370 spider_net_refill_rx_chain(card);
1371 spider_net_enable_rxdmac(card);
1375 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1376 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1377 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1378 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1379 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1380 /* case SPIDER_NET_GDSERINT: problem, print a message */
1381 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1382 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1383 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1384 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1385 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1391 /* check GHIINT2STS ************************************/
1393 for (i = 0; i < 32; i++)
1394 if (error_reg2 & (1<<i))
1397 /* there is nothing we can (want to) do at this time. Log a
1398 * message, we can switch on and off the specific values later on
1399 case SPIDER_NET_GPROPERINT:
1400 case SPIDER_NET_GMCTCRSNGINT:
1401 case SPIDER_NET_GMCTLCOLINT:
1402 case SPIDER_NET_GMCTTMOTINT:
1403 case SPIDER_NET_GMCRCAERINT:
1404 case SPIDER_NET_GMCRCALERINT:
1405 case SPIDER_NET_GMCRALNERINT:
1406 case SPIDER_NET_GMCROVRINT:
1407 case SPIDER_NET_GMCRRNTINT:
1408 case SPIDER_NET_GMCRRXERINT:
1409 case SPIDER_NET_GTITCSERINT:
1410 case SPIDER_NET_GTIFMTERINT:
1411 case SPIDER_NET_GTIPKTRVKINT:
1412 case SPIDER_NET_GTISPINGINT:
1413 case SPIDER_NET_GTISADNGINT:
1414 case SPIDER_NET_GTISPDNGINT:
1415 case SPIDER_NET_GRIFMTERINT:
1416 case SPIDER_NET_GRIPKTRVKINT:
1417 case SPIDER_NET_GRISPINGINT:
1418 case SPIDER_NET_GRISADNGINT:
1419 case SPIDER_NET_GRISPDNGINT:
1426 if ((show_error) && (netif_msg_intr(card)))
1427 pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
1428 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1429 status_reg, error_reg1, error_reg2);
1431 /* clear interrupt sources */
1432 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1433 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1437 * spider_net_interrupt - interrupt handler for spider_net
1438 * @irq: interupt number
1439 * @ptr: pointer to net_device
1440 * @regs: PU registers
1442 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1443 * interrupt found raised by card.
1445 * This is the interrupt handler, that turns off
1446 * interrupts for this device and makes the stack poll the driver
1449 spider_net_interrupt(int irq, void *ptr)
1451 struct net_device *netdev = ptr;
1452 struct spider_net_card *card = netdev_priv(netdev);
1455 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1460 if (status_reg & SPIDER_NET_RXINT ) {
1461 spider_net_rx_irq_off(card);
1462 netif_rx_schedule(netdev);
1465 if (status_reg & SPIDER_NET_ERRINT )
1466 spider_net_handle_error_irq(card, status_reg);
1468 /* clear interrupt sources */
1469 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1474 #ifdef CONFIG_NET_POLL_CONTROLLER
1476 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1477 * @netdev: interface device structure
1479 * see Documentation/networking/netconsole.txt
1482 spider_net_poll_controller(struct net_device *netdev)
1484 disable_irq(netdev->irq);
1485 spider_net_interrupt(netdev->irq, netdev);
1486 enable_irq(netdev->irq);
1488 #endif /* CONFIG_NET_POLL_CONTROLLER */
1491 * spider_net_init_card - initializes the card
1492 * @card: card structure
1494 * spider_net_init_card initializes the card so that other registers can
1498 spider_net_init_card(struct spider_net_card *card)
1500 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1501 SPIDER_NET_CKRCTRL_STOP_VALUE);
1503 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1504 SPIDER_NET_CKRCTRL_RUN_VALUE);
1508 * spider_net_enable_card - enables the card by setting all kinds of regs
1509 * @card: card structure
1511 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1514 spider_net_enable_card(struct spider_net_card *card)
1517 /* the following array consists of (register),(value) pairs
1518 * that are set in this function. A register of 0 ends the list */
1520 { SPIDER_NET_GRESUMINTNUM, 0 },
1521 { SPIDER_NET_GREINTNUM, 0 },
1523 /* set interrupt frame number registers */
1524 /* clear the single DMA engine registers first */
1525 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1526 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1527 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1528 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1529 /* then set, what we really need */
1530 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1532 /* timer counter registers and stuff */
1533 { SPIDER_NET_GFREECNNUM, 0 },
1534 { SPIDER_NET_GONETIMENUM, 0 },
1535 { SPIDER_NET_GTOUTFRMNUM, 0 },
1537 /* RX mode setting */
1538 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1539 /* TX mode setting */
1540 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1541 /* IPSEC mode setting */
1542 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1544 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1546 { SPIDER_NET_GMRWOLCTRL, 0 },
1547 { SPIDER_NET_GTESTMD, 0x10000000 },
1548 { SPIDER_NET_GTTQMSK, 0x00400040 },
1550 { SPIDER_NET_GMACINTEN, 0 },
1552 /* flow control stuff */
1553 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1554 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1556 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1561 while (regs[i][0]) {
1562 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1566 /* clear unicast filter table entries 1 to 14 */
1567 for (i = 1; i <= 14; i++) {
1568 spider_net_write_reg(card,
1569 SPIDER_NET_GMRUAFILnR + i * 8,
1571 spider_net_write_reg(card,
1572 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1576 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1578 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1580 /* set chain tail adress for RX chains and
1582 spider_net_enable_rxchtails(card);
1583 spider_net_enable_rxdmac(card);
1585 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1587 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1588 SPIDER_NET_LENLMT_VALUE);
1589 spider_net_write_reg(card, SPIDER_NET_GMACMODE,
1590 SPIDER_NET_MACMODE_VALUE);
1591 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1592 SPIDER_NET_OPMODE_VALUE);
1594 /* set interrupt mask registers */
1595 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1596 SPIDER_NET_INT0_MASK_VALUE);
1597 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1598 SPIDER_NET_INT1_MASK_VALUE);
1599 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1600 SPIDER_NET_INT2_MASK_VALUE);
1602 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1603 SPIDER_NET_GDTDCEIDIS);
1607 * spider_net_open - called upon ifonfig up
1608 * @netdev: interface device structure
1610 * returns 0 on success, <0 on failure
1612 * spider_net_open allocates all the descriptors and memory needed for
1613 * operation, sets up multicast list and enables interrupts
1616 spider_net_open(struct net_device *netdev)
1618 struct spider_net_card *card = netdev_priv(netdev);
1622 if (spider_net_init_chain(card, &card->tx_chain, card->descr,
1623 PCI_DMA_TODEVICE, card->tx_desc))
1624 goto alloc_tx_failed;
1625 if (spider_net_init_chain(card, &card->rx_chain,
1626 card->descr + card->rx_desc,
1627 PCI_DMA_FROMDEVICE, card->rx_desc))
1628 goto alloc_rx_failed;
1630 /* allocate rx skbs */
1631 if (spider_net_alloc_rx_skbs(card))
1632 goto alloc_skbs_failed;
1634 spider_net_set_multi(netdev);
1636 /* further enhancement: setup hw vlan, if needed */
1639 if (request_irq(netdev->irq, spider_net_interrupt,
1640 IRQF_SHARED, netdev->name, netdev))
1641 goto register_int_failed;
1643 spider_net_enable_card(card);
1645 netif_start_queue(netdev);
1646 netif_carrier_on(netdev);
1647 netif_poll_enable(netdev);
1651 register_int_failed:
1652 spider_net_free_rx_chain_contents(card);
1654 spider_net_free_chain(card, &card->rx_chain);
1656 spider_net_free_chain(card, &card->tx_chain);
1662 * spider_net_setup_phy - setup PHY
1663 * @card: card structure
1665 * returns 0 on success, <0 on failure
1667 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1668 * the PHY to 1000 Mbps
1671 spider_net_setup_phy(struct spider_net_card *card)
1673 struct mii_phy *phy = &card->phy;
1675 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1676 SPIDER_NET_DMASEL_VALUE);
1677 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1678 SPIDER_NET_PHY_CTRL_VALUE);
1680 phy->dev = card->netdev;
1681 phy->mdio_read = spider_net_read_phy;
1682 phy->mdio_write = spider_net_write_phy;
1684 mii_phy_probe(phy, phy->mii_id);
1686 if (phy->def->ops->setup_forced)
1687 phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
1689 phy->def->ops->enable_fiber(phy);
1691 phy->def->ops->read_link(phy);
1692 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
1693 phy->speed, phy->duplex==1 ? "Full" : "Half");
1699 * spider_net_download_firmware - loads firmware into the adapter
1700 * @card: card structure
1701 * @firmware_ptr: pointer to firmware data
1703 * spider_net_download_firmware loads the firmware data into the
1704 * adapter. It assumes the length etc. to be allright.
1707 spider_net_download_firmware(struct spider_net_card *card,
1708 const void *firmware_ptr)
1711 const u32 *fw_ptr = firmware_ptr;
1713 /* stop sequencers */
1714 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1715 SPIDER_NET_STOP_SEQ_VALUE);
1717 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1719 spider_net_write_reg(card,
1720 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1721 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1722 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1723 sequencer * 8, *fw_ptr);
1728 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1731 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1732 SPIDER_NET_RUN_SEQ_VALUE);
1738 * spider_net_init_firmware - reads in firmware parts
1739 * @card: card structure
1741 * Returns 0 on success, <0 on failure
1743 * spider_net_init_firmware opens the sequencer firmware and does some basic
1744 * checks. This function opens and releases the firmware structure. A call
1745 * to download the firmware is performed before the release.
1749 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1750 * the program for each sequencer. Use the command
1751 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1752 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1753 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1755 * to generate spider_fw.bin, if you have sequencer programs with something
1756 * like the following contents for each sequencer:
1757 * <ONE LINE COMMENT>
1758 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1759 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1761 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1764 spider_net_init_firmware(struct spider_net_card *card)
1766 struct firmware *firmware = NULL;
1767 struct device_node *dn;
1768 const u8 *fw_prop = NULL;
1772 if (request_firmware((const struct firmware **)&firmware,
1773 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1774 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1775 netif_msg_probe(card) ) {
1776 pr_err("Incorrect size of spidernet firmware in " \
1777 "filesystem. Looking in host firmware...\n");
1780 err = spider_net_download_firmware(card, firmware->data);
1782 release_firmware(firmware);
1790 dn = pci_device_to_OF_node(card->pdev);
1794 fw_prop = get_property(dn, "firmware", &fw_size);
1798 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1799 netif_msg_probe(card) ) {
1800 pr_err("Incorrect size of spidernet firmware in " \
1805 err = spider_net_download_firmware(card, fw_prop);
1810 if (netif_msg_probe(card))
1811 pr_err("Couldn't find spidernet firmware in filesystem " \
1812 "or host firmware\n");
1817 * spider_net_workaround_rxramfull - work around firmware bug
1818 * @card: card structure
1823 spider_net_workaround_rxramfull(struct spider_net_card *card)
1825 int i, sequencer = 0;
1828 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1829 SPIDER_NET_CKRCTRL_RUN_VALUE);
1831 /* empty sequencer data */
1832 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1834 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
1835 sequencer * 8, 0x0);
1836 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1837 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1838 sequencer * 8, 0x0);
1842 /* set sequencer operation */
1843 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
1846 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1847 SPIDER_NET_CKRCTRL_STOP_VALUE);
1851 * spider_net_stop - called upon ifconfig down
1852 * @netdev: interface device structure
1857 spider_net_stop(struct net_device *netdev)
1859 struct spider_net_card *card = netdev_priv(netdev);
1861 tasklet_kill(&card->rxram_full_tl);
1862 netif_poll_disable(netdev);
1863 netif_carrier_off(netdev);
1864 netif_stop_queue(netdev);
1865 del_timer_sync(&card->tx_timer);
1867 /* disable/mask all interrupts */
1868 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1869 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1870 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1872 /* free_irq(netdev->irq, netdev);*/
1873 free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
1875 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1876 SPIDER_NET_DMA_TX_FEND_VALUE);
1878 /* turn off DMA, force end */
1879 spider_net_disable_rxdmac(card);
1881 /* release chains */
1882 if (spin_trylock(&card->tx_chain.lock)) {
1883 spider_net_release_tx_chain(card, 1);
1884 spin_unlock(&card->tx_chain.lock);
1887 spider_net_free_chain(card, &card->tx_chain);
1888 spider_net_free_chain(card, &card->rx_chain);
1894 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1895 * function (to be called not under interrupt status)
1896 * @data: data, is interface device structure
1898 * called as task when tx hangs, resets interface (if interface is up)
1901 spider_net_tx_timeout_task(void *data)
1903 struct net_device *netdev = data;
1904 struct spider_net_card *card = netdev_priv(netdev);
1906 if (!(netdev->flags & IFF_UP))
1909 netif_device_detach(netdev);
1910 spider_net_stop(netdev);
1912 spider_net_workaround_rxramfull(card);
1913 spider_net_init_card(card);
1915 if (spider_net_setup_phy(card))
1917 if (spider_net_init_firmware(card))
1920 spider_net_open(netdev);
1921 spider_net_kick_tx_dma(card);
1922 netif_device_attach(netdev);
1925 atomic_dec(&card->tx_timeout_task_counter);
1929 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1930 * @netdev: interface device structure
1932 * called, if tx hangs. Schedules a task that resets the interface
1935 spider_net_tx_timeout(struct net_device *netdev)
1937 struct spider_net_card *card;
1939 card = netdev_priv(netdev);
1940 atomic_inc(&card->tx_timeout_task_counter);
1941 if (netdev->flags & IFF_UP)
1942 schedule_work(&card->tx_timeout_task);
1944 atomic_dec(&card->tx_timeout_task_counter);
1945 card->spider_stats.tx_timeouts++;
1949 * spider_net_setup_netdev_ops - initialization of net_device operations
1950 * @netdev: net_device structure
1952 * fills out function pointers in the net_device structure
1955 spider_net_setup_netdev_ops(struct net_device *netdev)
1957 netdev->open = &spider_net_open;
1958 netdev->stop = &spider_net_stop;
1959 netdev->hard_start_xmit = &spider_net_xmit;
1960 netdev->get_stats = &spider_net_get_stats;
1961 netdev->set_multicast_list = &spider_net_set_multi;
1962 netdev->set_mac_address = &spider_net_set_mac;
1963 netdev->change_mtu = &spider_net_change_mtu;
1964 netdev->do_ioctl = &spider_net_do_ioctl;
1966 netdev->tx_timeout = &spider_net_tx_timeout;
1967 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
1969 netdev->poll = &spider_net_poll;
1970 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
1972 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
1973 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
1974 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
1975 #ifdef CONFIG_NET_POLL_CONTROLLER
1976 /* poll controller */
1977 netdev->poll_controller = &spider_net_poll_controller;
1978 #endif /* CONFIG_NET_POLL_CONTROLLER */
1980 netdev->ethtool_ops = &spider_net_ethtool_ops;
1984 * spider_net_setup_netdev - initialization of net_device
1985 * @card: card structure
1987 * Returns 0 on success or <0 on failure
1989 * spider_net_setup_netdev initializes the net_device structure
1992 spider_net_setup_netdev(struct spider_net_card *card)
1995 struct net_device *netdev = card->netdev;
1996 struct device_node *dn;
1997 struct sockaddr addr;
2000 SET_MODULE_OWNER(netdev);
2001 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2003 pci_set_drvdata(card->pdev, netdev);
2005 card->rxram_full_tl.data = (unsigned long) card;
2006 card->rxram_full_tl.func =
2007 (void (*)(unsigned long)) spider_net_handle_rxram_full;
2008 init_timer(&card->tx_timer);
2009 card->tx_timer.function =
2010 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2011 card->tx_timer.data = (unsigned long) card;
2012 netdev->irq = card->pdev->irq;
2014 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2016 card->tx_desc = tx_descriptors;
2017 card->rx_desc = rx_descriptors;
2019 spider_net_setup_netdev_ops(netdev);
2021 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
2022 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2023 * NETIF_F_HW_VLAN_FILTER */
2025 netdev->irq = card->pdev->irq;
2027 dn = pci_device_to_OF_node(card->pdev);
2031 mac = get_property(dn, "local-mac-address", NULL);
2034 memcpy(addr.sa_data, mac, ETH_ALEN);
2036 result = spider_net_set_mac(netdev, &addr);
2037 if ((result) && (netif_msg_probe(card)))
2038 pr_err("Failed to set MAC address: %i\n", result);
2040 result = register_netdev(netdev);
2042 if (netif_msg_probe(card))
2043 pr_err("Couldn't register net_device: %i\n",
2048 if (netif_msg_probe(card))
2049 pr_info("Initialized device %s.\n", netdev->name);
2055 * spider_net_alloc_card - allocates net_device and card structure
2057 * returns the card structure or NULL in case of errors
2059 * the card and net_device structures are linked to each other
2061 static struct spider_net_card *
2062 spider_net_alloc_card(void)
2064 struct net_device *netdev;
2065 struct spider_net_card *card;
2068 alloc_size = sizeof (*card) +
2069 sizeof (struct spider_net_descr) * rx_descriptors +
2070 sizeof (struct spider_net_descr) * tx_descriptors;
2071 netdev = alloc_etherdev(alloc_size);
2075 card = netdev_priv(netdev);
2076 card->netdev = netdev;
2077 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2078 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev);
2079 init_waitqueue_head(&card->waitq);
2080 atomic_set(&card->tx_timeout_task_counter, 0);
2086 * spider_net_undo_pci_setup - releases PCI ressources
2087 * @card: card structure
2089 * spider_net_undo_pci_setup releases the mapped regions
2092 spider_net_undo_pci_setup(struct spider_net_card *card)
2094 iounmap(card->regs);
2095 pci_release_regions(card->pdev);
2099 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2100 * @card: card structure
2103 * Returns the card structure or NULL if any errors occur
2105 * spider_net_setup_pci_dev initializes pdev and together with the
2106 * functions called in spider_net_open configures the device so that
2107 * data can be transferred over it
2108 * The net_device structure is attached to the card structure, if the
2109 * function returns without error.
2111 static struct spider_net_card *
2112 spider_net_setup_pci_dev(struct pci_dev *pdev)
2114 struct spider_net_card *card;
2115 unsigned long mmio_start, mmio_len;
2117 if (pci_enable_device(pdev)) {
2118 pr_err("Couldn't enable PCI device\n");
2122 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2123 pr_err("Couldn't find proper PCI device base address.\n");
2124 goto out_disable_dev;
2127 if (pci_request_regions(pdev, spider_net_driver_name)) {
2128 pr_err("Couldn't obtain PCI resources, aborting.\n");
2129 goto out_disable_dev;
2132 pci_set_master(pdev);
2134 card = spider_net_alloc_card();
2136 pr_err("Couldn't allocate net_device structure, "
2138 goto out_release_regions;
2142 /* fetch base address and length of first resource */
2143 mmio_start = pci_resource_start(pdev, 0);
2144 mmio_len = pci_resource_len(pdev, 0);
2146 card->netdev->mem_start = mmio_start;
2147 card->netdev->mem_end = mmio_start + mmio_len;
2148 card->regs = ioremap(mmio_start, mmio_len);
2151 pr_err("Couldn't obtain PCI resources, aborting.\n");
2152 goto out_release_regions;
2157 out_release_regions:
2158 pci_release_regions(pdev);
2160 pci_disable_device(pdev);
2161 pci_set_drvdata(pdev, NULL);
2166 * spider_net_probe - initialization of a device
2168 * @ent: entry in the device id list
2170 * Returns 0 on success, <0 on failure
2172 * spider_net_probe initializes pdev and registers a net_device
2173 * structure for it. After that, the device can be ifconfig'ed up
2175 static int __devinit
2176 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2179 struct spider_net_card *card;
2181 card = spider_net_setup_pci_dev(pdev);
2185 spider_net_workaround_rxramfull(card);
2186 spider_net_init_card(card);
2188 err = spider_net_setup_phy(card);
2192 err = spider_net_init_firmware(card);
2196 err = spider_net_setup_netdev(card);
2203 spider_net_undo_pci_setup(card);
2204 free_netdev(card->netdev);
2210 * spider_net_remove - removal of a device
2213 * Returns 0 on success, <0 on failure
2215 * spider_net_remove is called to remove the device and unregisters the
2218 static void __devexit
2219 spider_net_remove(struct pci_dev *pdev)
2221 struct net_device *netdev;
2222 struct spider_net_card *card;
2224 netdev = pci_get_drvdata(pdev);
2225 card = netdev_priv(netdev);
2227 wait_event(card->waitq,
2228 atomic_read(&card->tx_timeout_task_counter) == 0);
2230 unregister_netdev(netdev);
2232 /* switch off card */
2233 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2234 SPIDER_NET_CKRCTRL_STOP_VALUE);
2235 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2236 SPIDER_NET_CKRCTRL_RUN_VALUE);
2238 spider_net_undo_pci_setup(card);
2239 free_netdev(netdev);
2242 static struct pci_driver spider_net_driver = {
2243 .name = spider_net_driver_name,
2244 .id_table = spider_net_pci_tbl,
2245 .probe = spider_net_probe,
2246 .remove = __devexit_p(spider_net_remove)
2250 * spider_net_init - init function when the driver is loaded
2252 * spider_net_init registers the device driver
2254 static int __init spider_net_init(void)
2256 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2258 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2259 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2260 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2262 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2263 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2264 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2266 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2267 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2268 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2270 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2271 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2272 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2275 return pci_register_driver(&spider_net_driver);
2279 * spider_net_cleanup - exit function when driver is unloaded
2281 * spider_net_cleanup unregisters the device driver
2283 static void __exit spider_net_cleanup(void)
2285 pci_unregister_driver(&spider_net_driver);
2288 module_init(spider_net_init);
2289 module_exit(spider_net_cleanup);