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;
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;
704 pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
706 dev_kfree_skb_any(skb);
710 * spider_net_release_tx_chain - processes sent tx descriptors
711 * @card: adapter structure
712 * @brutal: if set, don't care about whether descriptor seems to be in use
714 * returns 0 if the tx ring is empty, otherwise 1.
716 * spider_net_release_tx_chain releases the tx descriptors that spider has
717 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
718 * If some other context is calling this function, we return 1 so that we're
719 * scheduled again (if we were scheduled) and will not loose initiative.
722 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
724 struct spider_net_descr_chain *chain = &card->tx_chain;
727 spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR);
729 while (chain->tail != chain->head) {
730 status = spider_net_get_descr_status(chain->tail);
732 case SPIDER_NET_DESCR_COMPLETE:
733 card->netdev_stats.tx_packets++;
734 card->netdev_stats.tx_bytes += chain->tail->skb->len;
737 case SPIDER_NET_DESCR_CARDOWNED:
740 /* fallthrough, if we release the descriptors
741 * brutally (then we don't care about
742 * SPIDER_NET_DESCR_CARDOWNED) */
744 case SPIDER_NET_DESCR_RESPONSE_ERROR:
745 case SPIDER_NET_DESCR_PROTECTION_ERROR:
746 case SPIDER_NET_DESCR_FORCE_END:
747 if (netif_msg_tx_err(card))
748 pr_err("%s: forcing end of tx descriptor "
749 "with status x%02x\n",
750 card->netdev->name, status);
751 card->netdev_stats.tx_errors++;
755 card->netdev_stats.tx_dropped++;
759 spider_net_release_tx_descr(card);
766 * spider_net_kick_tx_dma - enables TX DMA processing
767 * @card: card structure
768 * @descr: descriptor address to enable TX processing at
770 * spider_net_kick_tx_dma writes the current tx chain head as start address
771 * of the tx descriptor chain and enables the transmission DMA engine
774 spider_net_kick_tx_dma(struct spider_net_card *card)
776 struct spider_net_descr *descr;
778 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
779 SPIDER_NET_TX_DMA_EN)
782 descr = card->tx_chain.tail;
784 if (spider_net_get_descr_status(descr) ==
785 SPIDER_NET_DESCR_CARDOWNED) {
786 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
788 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
789 SPIDER_NET_DMA_TX_VALUE);
792 if (descr == card->tx_chain.head)
798 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
802 * spider_net_xmit - transmits a frame over the device
803 * @skb: packet to send out
804 * @netdev: interface device structure
806 * returns 0 on success, !0 on failure
809 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
811 struct spider_net_card *card = netdev_priv(netdev);
812 struct spider_net_descr_chain *chain = &card->tx_chain;
813 struct spider_net_descr *descr = chain->head;
817 spin_lock_irqsave(&chain->lock, flags);
819 spider_net_release_tx_chain(card, 0);
821 if (chain->head->next == chain->tail->prev) {
822 card->netdev_stats.tx_dropped++;
823 result = NETDEV_TX_LOCKED;
827 if (spider_net_get_descr_status(descr) != SPIDER_NET_DESCR_NOT_IN_USE) {
828 card->netdev_stats.tx_dropped++;
829 result = NETDEV_TX_LOCKED;
833 if (spider_net_prepare_tx_descr(card, skb) != 0) {
834 card->netdev_stats.tx_dropped++;
835 result = NETDEV_TX_BUSY;
839 result = NETDEV_TX_OK;
841 spider_net_kick_tx_dma(card);
842 card->tx_chain.head = card->tx_chain.head->next;
845 spin_unlock_irqrestore(&chain->lock, flags);
846 netif_wake_queue(netdev);
851 * spider_net_cleanup_tx_ring - cleans up the TX ring
852 * @card: card structure
854 * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
855 * interrupts to cleanup our TX ring) and returns sent packets to the stack
859 spider_net_cleanup_tx_ring(struct spider_net_card *card)
863 spin_lock_irqsave(&card->tx_chain.lock, flags);
865 if ((spider_net_release_tx_chain(card, 0) != 0) &&
866 (card->netdev->flags & IFF_UP))
867 spider_net_kick_tx_dma(card);
869 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
873 * spider_net_do_ioctl - called for device ioctls
874 * @netdev: interface device structure
875 * @ifr: request parameter structure for ioctl
876 * @cmd: command code for ioctl
878 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
879 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
882 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
891 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
892 * @descr: descriptor to process
893 * @card: card structure
894 * @napi: whether caller is in NAPI context
896 * returns 1 on success, 0 if no packet was passed to the stack
898 * iommu-unmaps the skb, fills out skb structure and passes the data to the
899 * stack. The descriptor state is not changed.
902 spider_net_pass_skb_up(struct spider_net_descr *descr,
903 struct spider_net_card *card, int napi)
906 struct net_device *netdev;
907 u32 data_status, data_error;
909 data_status = descr->data_status;
910 data_error = descr->data_error;
912 netdev = card->netdev;
914 /* unmap descriptor */
915 pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME,
918 /* the cases we'll throw away the packet immediately */
919 if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
920 if (netif_msg_rx_err(card))
921 pr_err("error in received descriptor found, "
922 "data_status=x%08x, data_error=x%08x\n",
923 data_status, data_error);
924 card->spider_stats.rx_desc_error++;
930 skb_put(skb, descr->valid_size);
932 /* the card seems to add 2 bytes of junk in front
933 * of the ethernet frame */
934 #define SPIDER_MISALIGN 2
935 skb_pull(skb, SPIDER_MISALIGN);
936 skb->protocol = eth_type_trans(skb, netdev);
938 /* checksum offload */
939 if (card->options.rx_csum) {
940 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
941 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
942 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
943 skb->ip_summed = CHECKSUM_UNNECESSARY;
945 skb->ip_summed = CHECKSUM_NONE;
947 skb->ip_summed = CHECKSUM_NONE;
949 if (data_status & SPIDER_NET_VLAN_PACKET) {
950 /* further enhancements: HW-accel VLAN
951 * vlan_hwaccel_receive_skb
955 /* pass skb up to stack */
957 netif_receive_skb(skb);
961 /* update netdevice statistics */
962 card->netdev_stats.rx_packets++;
963 card->netdev_stats.rx_bytes += skb->len;
969 * spider_net_decode_one_descr - processes an rx descriptor
970 * @card: card structure
971 * @napi: whether caller is in NAPI context
973 * returns 1 if a packet has been sent to the stack, otherwise 0
975 * processes an rx descriptor by iommu-unmapping the data buffer and passing
976 * the packet up to the stack. This function is called in softirq
977 * context, e.g. either bottom half from interrupt or NAPI polling context
980 spider_net_decode_one_descr(struct spider_net_card *card, int napi)
982 struct spider_net_descr_chain *chain = &card->rx_chain;
983 struct spider_net_descr *descr = chain->tail;
987 status = spider_net_get_descr_status(descr);
989 if (status == SPIDER_NET_DESCR_CARDOWNED) {
990 /* nothing in the descriptor yet */
995 if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
996 /* not initialized yet, the ring must be empty */
997 spider_net_refill_rx_chain(card);
998 spider_net_enable_rxdmac(card);
1003 /* descriptor definitively used -- move on tail */
1004 chain->tail = descr->next;
1007 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1008 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1009 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1010 if (netif_msg_rx_err(card))
1011 pr_err("%s: dropping RX descriptor with state %d\n",
1012 card->netdev->name, status);
1013 card->netdev_stats.rx_dropped++;
1014 pci_unmap_single(card->pdev, descr->buf_addr,
1015 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1016 dev_kfree_skb_irq(descr->skb);
1020 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1021 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1022 if (netif_msg_rx_err(card)) {
1023 pr_err("%s: RX descriptor with state %d\n",
1024 card->netdev->name, status);
1025 card->spider_stats.rx_desc_unk_state++;
1030 /* ok, we've got a packet in descr */
1031 result = spider_net_pass_skb_up(descr, card, napi);
1033 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1034 /* change the descriptor state: */
1036 spider_net_refill_rx_chain(card);
1042 * spider_net_poll - NAPI poll function called by the stack to return packets
1043 * @netdev: interface device structure
1044 * @budget: number of packets we can pass to the stack at most
1046 * returns 0 if no more packets available to the driver/stack. Returns 1,
1047 * if the quota is exceeded, but the driver has still packets.
1049 * spider_net_poll returns all packets from the rx descriptors to the stack
1050 * (using netif_receive_skb). If all/enough packets are up, the driver
1051 * reenables interrupts and returns 0. If not, 1 is returned.
1054 spider_net_poll(struct net_device *netdev, int *budget)
1056 struct spider_net_card *card = netdev_priv(netdev);
1057 int packets_to_do, packets_done = 0;
1058 int no_more_packets = 0;
1060 packets_to_do = min(*budget, netdev->quota);
1062 while (packets_to_do) {
1063 if (spider_net_decode_one_descr(card, 1)) {
1067 /* no more packets for the stack */
1068 no_more_packets = 1;
1073 netdev->quota -= packets_done;
1074 *budget -= packets_done;
1075 spider_net_refill_rx_chain(card);
1077 /* if all packets are in the stack, enable interrupts and return 0 */
1078 /* if not, return 1 */
1079 if (no_more_packets) {
1080 netif_rx_complete(netdev);
1081 spider_net_rx_irq_on(card);
1089 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1090 * @netdev: interface device structure
1091 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1094 spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1096 /* further enhancement... yet to do */
1101 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1102 * @netdev: interface device structure
1103 * @vid: VLAN id to add
1106 spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1108 /* further enhancement... yet to do */
1109 /* add vid to card's VLAN filter table */
1114 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1115 * @netdev: interface device structure
1116 * @vid: VLAN id to remove
1119 spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1121 /* further enhancement... yet to do */
1122 /* remove vid from card's VLAN filter table */
1126 * spider_net_get_stats - get interface statistics
1127 * @netdev: interface device structure
1129 * returns the interface statistics residing in the spider_net_card struct
1131 static struct net_device_stats *
1132 spider_net_get_stats(struct net_device *netdev)
1134 struct spider_net_card *card = netdev_priv(netdev);
1135 struct net_device_stats *stats = &card->netdev_stats;
1140 * spider_net_change_mtu - changes the MTU of an interface
1141 * @netdev: interface device structure
1142 * @new_mtu: new MTU value
1144 * returns 0 on success, <0 on failure
1147 spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1149 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1150 * and mtu is outbound only anyway */
1151 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1152 (new_mtu > SPIDER_NET_MAX_MTU) )
1154 netdev->mtu = new_mtu;
1159 * spider_net_set_mac - sets the MAC of an interface
1160 * @netdev: interface device structure
1161 * @ptr: pointer to new MAC address
1163 * Returns 0 on success, <0 on failure. Currently, we don't support this
1164 * and will always return EOPNOTSUPP.
1167 spider_net_set_mac(struct net_device *netdev, void *p)
1169 struct spider_net_card *card = netdev_priv(netdev);
1170 u32 macl, macu, regvalue;
1171 struct sockaddr *addr = p;
1173 if (!is_valid_ether_addr(addr->sa_data))
1174 return -EADDRNOTAVAIL;
1176 /* switch off GMACTPE and GMACRPE */
1177 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1178 regvalue &= ~((1 << 5) | (1 << 6));
1179 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1182 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1183 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1184 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1185 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1186 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1188 /* switch GMACTPE and GMACRPE back on */
1189 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1190 regvalue |= ((1 << 5) | (1 << 6));
1191 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1193 spider_net_set_promisc(card);
1195 /* look up, whether we have been successful */
1196 if (spider_net_get_mac_address(netdev))
1197 return -EADDRNOTAVAIL;
1198 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1199 return -EADDRNOTAVAIL;
1205 * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt
1206 * @card: card structure
1208 * spider_net_handle_rxram_full empties the RX ring so that spider can put
1209 * more packets in it and empty its RX RAM. This is called in bottom half
1213 spider_net_handle_rxram_full(struct spider_net_card *card)
1215 while (spider_net_decode_one_descr(card, 0))
1217 spider_net_enable_rxchtails(card);
1218 spider_net_enable_rxdmac(card);
1219 netif_rx_schedule(card->netdev);
1223 * spider_net_handle_error_irq - handles errors raised by an interrupt
1224 * @card: card structure
1225 * @status_reg: interrupt status register 0 (GHIINT0STS)
1227 * spider_net_handle_error_irq treats or ignores all error conditions
1228 * found when an interrupt is presented
1231 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1233 u32 error_reg1, error_reg2;
1237 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1238 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1240 /* check GHIINT0STS ************************************/
1242 for (i = 0; i < 32; i++)
1243 if (status_reg & (1<<i))
1246 /* let error_reg1 and error_reg2 evaluation decide, what to do
1247 case SPIDER_NET_PHYINT:
1248 case SPIDER_NET_GMAC2INT:
1249 case SPIDER_NET_GMAC1INT:
1250 case SPIDER_NET_GIPSINT:
1251 case SPIDER_NET_GFIFOINT:
1252 case SPIDER_NET_DMACINT:
1253 case SPIDER_NET_GSYSINT:
1256 case SPIDER_NET_GPWOPCMPINT:
1257 /* PHY write operation completed */
1260 case SPIDER_NET_GPROPCMPINT:
1261 /* PHY read operation completed */
1262 /* we don't use semaphores, as we poll for the completion
1263 * of the read operation in spider_net_read_phy. Should take
1267 case SPIDER_NET_GPWFFINT:
1268 /* PHY command queue full */
1269 if (netif_msg_intr(card))
1270 pr_err("PHY write queue full\n");
1274 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1275 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1276 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1278 case SPIDER_NET_GDTDEN0INT:
1279 /* someone has set TX_DMA_EN to 0 */
1283 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1284 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1285 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1286 case SPIDER_NET_GDADEN0INT:
1287 /* someone has set RX_DMA_EN to 0 */
1292 case SPIDER_NET_GDDFDCINT:
1293 case SPIDER_NET_GDCFDCINT:
1294 case SPIDER_NET_GDBFDCINT:
1295 case SPIDER_NET_GDAFDCINT:
1296 /* case SPIDER_NET_GDNMINT: not used. print a message */
1297 /* case SPIDER_NET_GCNMINT: not used. print a message */
1298 /* case SPIDER_NET_GBNMINT: not used. print a message */
1299 /* case SPIDER_NET_GANMINT: not used. print a message */
1300 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1305 case SPIDER_NET_GDTFDCINT:
1308 case SPIDER_NET_GTTEDINT:
1311 case SPIDER_NET_GDTDCEINT:
1312 /* chain end. If a descriptor should be sent, kick off
1314 if (card->tx_chain.tail == card->tx_chain.head)
1315 spider_net_kick_tx_dma(card);
1319 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1320 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1323 /* check GHIINT1STS ************************************/
1325 for (i = 0; i < 32; i++)
1326 if (error_reg1 & (1<<i))
1329 case SPIDER_NET_GTMFLLINT:
1330 if (netif_msg_intr(card) && net_ratelimit())
1331 pr_err("Spider TX RAM full\n");
1334 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1335 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1336 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1337 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1338 case SPIDER_NET_GRMFLLINT:
1339 if (netif_msg_intr(card) && net_ratelimit())
1340 pr_debug("Spider RX RAM full, incoming packets "
1341 "might be discarded!\n");
1342 spider_net_rx_irq_off(card);
1343 tasklet_schedule(&card->rxram_full_tl);
1347 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1348 case SPIDER_NET_GDTINVDINT:
1349 /* allrighty. tx from previous descr ok */
1354 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1355 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1356 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1357 case SPIDER_NET_GDADCEINT:
1358 if (netif_msg_intr(card))
1359 pr_err("got descriptor chain end interrupt, "
1360 "restarting DMAC %c.\n",
1361 'D'+i-SPIDER_NET_GDDDCEINT);
1362 spider_net_refill_rx_chain(card);
1363 spider_net_enable_rxdmac(card);
1367 /* invalid descriptor */
1368 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1369 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1370 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1371 case SPIDER_NET_GDAINVDINT:
1372 /* could happen when rx chain is full */
1373 spider_net_refill_rx_chain(card);
1374 spider_net_enable_rxdmac(card);
1378 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1379 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1380 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1381 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1382 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1383 /* case SPIDER_NET_GDSERINT: problem, print a message */
1384 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1385 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1386 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1387 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1388 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1394 /* check GHIINT2STS ************************************/
1396 for (i = 0; i < 32; i++)
1397 if (error_reg2 & (1<<i))
1400 /* there is nothing we can (want to) do at this time. Log a
1401 * message, we can switch on and off the specific values later on
1402 case SPIDER_NET_GPROPERINT:
1403 case SPIDER_NET_GMCTCRSNGINT:
1404 case SPIDER_NET_GMCTLCOLINT:
1405 case SPIDER_NET_GMCTTMOTINT:
1406 case SPIDER_NET_GMCRCAERINT:
1407 case SPIDER_NET_GMCRCALERINT:
1408 case SPIDER_NET_GMCRALNERINT:
1409 case SPIDER_NET_GMCROVRINT:
1410 case SPIDER_NET_GMCRRNTINT:
1411 case SPIDER_NET_GMCRRXERINT:
1412 case SPIDER_NET_GTITCSERINT:
1413 case SPIDER_NET_GTIFMTERINT:
1414 case SPIDER_NET_GTIPKTRVKINT:
1415 case SPIDER_NET_GTISPINGINT:
1416 case SPIDER_NET_GTISADNGINT:
1417 case SPIDER_NET_GTISPDNGINT:
1418 case SPIDER_NET_GRIFMTERINT:
1419 case SPIDER_NET_GRIPKTRVKINT:
1420 case SPIDER_NET_GRISPINGINT:
1421 case SPIDER_NET_GRISADNGINT:
1422 case SPIDER_NET_GRISPDNGINT:
1429 if ((show_error) && (netif_msg_intr(card)))
1430 pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
1431 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1432 status_reg, error_reg1, error_reg2);
1434 /* clear interrupt sources */
1435 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1436 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1440 * spider_net_interrupt - interrupt handler for spider_net
1441 * @irq: interupt number
1442 * @ptr: pointer to net_device
1443 * @regs: PU registers
1445 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1446 * interrupt found raised by card.
1448 * This is the interrupt handler, that turns off
1449 * interrupts for this device and makes the stack poll the driver
1452 spider_net_interrupt(int irq, void *ptr)
1454 struct net_device *netdev = ptr;
1455 struct spider_net_card *card = netdev_priv(netdev);
1458 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1463 if (status_reg & SPIDER_NET_RXINT ) {
1464 spider_net_rx_irq_off(card);
1465 netif_rx_schedule(netdev);
1468 if (status_reg & SPIDER_NET_ERRINT )
1469 spider_net_handle_error_irq(card, status_reg);
1471 /* clear interrupt sources */
1472 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1477 #ifdef CONFIG_NET_POLL_CONTROLLER
1479 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1480 * @netdev: interface device structure
1482 * see Documentation/networking/netconsole.txt
1485 spider_net_poll_controller(struct net_device *netdev)
1487 disable_irq(netdev->irq);
1488 spider_net_interrupt(netdev->irq, netdev);
1489 enable_irq(netdev->irq);
1491 #endif /* CONFIG_NET_POLL_CONTROLLER */
1494 * spider_net_init_card - initializes the card
1495 * @card: card structure
1497 * spider_net_init_card initializes the card so that other registers can
1501 spider_net_init_card(struct spider_net_card *card)
1503 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1504 SPIDER_NET_CKRCTRL_STOP_VALUE);
1506 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1507 SPIDER_NET_CKRCTRL_RUN_VALUE);
1511 * spider_net_enable_card - enables the card by setting all kinds of regs
1512 * @card: card structure
1514 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1517 spider_net_enable_card(struct spider_net_card *card)
1520 /* the following array consists of (register),(value) pairs
1521 * that are set in this function. A register of 0 ends the list */
1523 { SPIDER_NET_GRESUMINTNUM, 0 },
1524 { SPIDER_NET_GREINTNUM, 0 },
1526 /* set interrupt frame number registers */
1527 /* clear the single DMA engine registers first */
1528 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1529 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1530 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1531 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1532 /* then set, what we really need */
1533 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1535 /* timer counter registers and stuff */
1536 { SPIDER_NET_GFREECNNUM, 0 },
1537 { SPIDER_NET_GONETIMENUM, 0 },
1538 { SPIDER_NET_GTOUTFRMNUM, 0 },
1540 /* RX mode setting */
1541 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1542 /* TX mode setting */
1543 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1544 /* IPSEC mode setting */
1545 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1547 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1549 { SPIDER_NET_GMRWOLCTRL, 0 },
1550 { SPIDER_NET_GTESTMD, 0x10000000 },
1551 { SPIDER_NET_GTTQMSK, 0x00400040 },
1553 { SPIDER_NET_GMACINTEN, 0 },
1555 /* flow control stuff */
1556 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1557 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1559 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1564 while (regs[i][0]) {
1565 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1569 /* clear unicast filter table entries 1 to 14 */
1570 for (i = 1; i <= 14; i++) {
1571 spider_net_write_reg(card,
1572 SPIDER_NET_GMRUAFILnR + i * 8,
1574 spider_net_write_reg(card,
1575 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1579 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1581 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1583 /* set chain tail adress for RX chains and
1585 spider_net_enable_rxchtails(card);
1586 spider_net_enable_rxdmac(card);
1588 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1590 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1591 SPIDER_NET_LENLMT_VALUE);
1592 spider_net_write_reg(card, SPIDER_NET_GMACMODE,
1593 SPIDER_NET_MACMODE_VALUE);
1594 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1595 SPIDER_NET_OPMODE_VALUE);
1597 /* set interrupt mask registers */
1598 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1599 SPIDER_NET_INT0_MASK_VALUE);
1600 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1601 SPIDER_NET_INT1_MASK_VALUE);
1602 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1603 SPIDER_NET_INT2_MASK_VALUE);
1605 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1606 SPIDER_NET_GDTDCEIDIS);
1610 * spider_net_open - called upon ifonfig up
1611 * @netdev: interface device structure
1613 * returns 0 on success, <0 on failure
1615 * spider_net_open allocates all the descriptors and memory needed for
1616 * operation, sets up multicast list and enables interrupts
1619 spider_net_open(struct net_device *netdev)
1621 struct spider_net_card *card = netdev_priv(netdev);
1625 if (spider_net_init_chain(card, &card->tx_chain, card->descr,
1626 PCI_DMA_TODEVICE, card->tx_desc))
1627 goto alloc_tx_failed;
1628 if (spider_net_init_chain(card, &card->rx_chain,
1629 card->descr + card->rx_desc,
1630 PCI_DMA_FROMDEVICE, card->rx_desc))
1631 goto alloc_rx_failed;
1633 /* allocate rx skbs */
1634 if (spider_net_alloc_rx_skbs(card))
1635 goto alloc_skbs_failed;
1637 spider_net_set_multi(netdev);
1639 /* further enhancement: setup hw vlan, if needed */
1642 if (request_irq(netdev->irq, spider_net_interrupt,
1643 IRQF_SHARED, netdev->name, netdev))
1644 goto register_int_failed;
1646 spider_net_enable_card(card);
1648 netif_start_queue(netdev);
1649 netif_carrier_on(netdev);
1650 netif_poll_enable(netdev);
1654 register_int_failed:
1655 spider_net_free_rx_chain_contents(card);
1657 spider_net_free_chain(card, &card->rx_chain);
1659 spider_net_free_chain(card, &card->tx_chain);
1665 * spider_net_setup_phy - setup PHY
1666 * @card: card structure
1668 * returns 0 on success, <0 on failure
1670 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1671 * the PHY to 1000 Mbps
1674 spider_net_setup_phy(struct spider_net_card *card)
1676 struct mii_phy *phy = &card->phy;
1678 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1679 SPIDER_NET_DMASEL_VALUE);
1680 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1681 SPIDER_NET_PHY_CTRL_VALUE);
1683 phy->dev = card->netdev;
1684 phy->mdio_read = spider_net_read_phy;
1685 phy->mdio_write = spider_net_write_phy;
1687 mii_phy_probe(phy, phy->mii_id);
1689 if (phy->def->ops->setup_forced)
1690 phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
1692 phy->def->ops->enable_fiber(phy);
1694 phy->def->ops->read_link(phy);
1695 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
1696 phy->speed, phy->duplex==1 ? "Full" : "Half");
1702 * spider_net_download_firmware - loads firmware into the adapter
1703 * @card: card structure
1704 * @firmware_ptr: pointer to firmware data
1706 * spider_net_download_firmware loads the firmware data into the
1707 * adapter. It assumes the length etc. to be allright.
1710 spider_net_download_firmware(struct spider_net_card *card,
1711 const void *firmware_ptr)
1714 const u32 *fw_ptr = firmware_ptr;
1716 /* stop sequencers */
1717 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1718 SPIDER_NET_STOP_SEQ_VALUE);
1720 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1722 spider_net_write_reg(card,
1723 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1724 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1725 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1726 sequencer * 8, *fw_ptr);
1731 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1734 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1735 SPIDER_NET_RUN_SEQ_VALUE);
1741 * spider_net_init_firmware - reads in firmware parts
1742 * @card: card structure
1744 * Returns 0 on success, <0 on failure
1746 * spider_net_init_firmware opens the sequencer firmware and does some basic
1747 * checks. This function opens and releases the firmware structure. A call
1748 * to download the firmware is performed before the release.
1752 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1753 * the program for each sequencer. Use the command
1754 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1755 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1756 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1758 * to generate spider_fw.bin, if you have sequencer programs with something
1759 * like the following contents for each sequencer:
1760 * <ONE LINE COMMENT>
1761 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1762 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1764 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1767 spider_net_init_firmware(struct spider_net_card *card)
1769 struct firmware *firmware = NULL;
1770 struct device_node *dn;
1771 const u8 *fw_prop = NULL;
1775 if (request_firmware((const struct firmware **)&firmware,
1776 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1777 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1778 netif_msg_probe(card) ) {
1779 pr_err("Incorrect size of spidernet firmware in " \
1780 "filesystem. Looking in host firmware...\n");
1783 err = spider_net_download_firmware(card, firmware->data);
1785 release_firmware(firmware);
1793 dn = pci_device_to_OF_node(card->pdev);
1797 fw_prop = get_property(dn, "firmware", &fw_size);
1801 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1802 netif_msg_probe(card) ) {
1803 pr_err("Incorrect size of spidernet firmware in " \
1808 err = spider_net_download_firmware(card, fw_prop);
1813 if (netif_msg_probe(card))
1814 pr_err("Couldn't find spidernet firmware in filesystem " \
1815 "or host firmware\n");
1820 * spider_net_workaround_rxramfull - work around firmware bug
1821 * @card: card structure
1826 spider_net_workaround_rxramfull(struct spider_net_card *card)
1828 int i, sequencer = 0;
1831 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1832 SPIDER_NET_CKRCTRL_RUN_VALUE);
1834 /* empty sequencer data */
1835 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1837 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
1838 sequencer * 8, 0x0);
1839 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1840 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1841 sequencer * 8, 0x0);
1845 /* set sequencer operation */
1846 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
1849 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1850 SPIDER_NET_CKRCTRL_STOP_VALUE);
1854 * spider_net_stop - called upon ifconfig down
1855 * @netdev: interface device structure
1860 spider_net_stop(struct net_device *netdev)
1862 struct spider_net_card *card = netdev_priv(netdev);
1864 tasklet_kill(&card->rxram_full_tl);
1865 netif_poll_disable(netdev);
1866 netif_carrier_off(netdev);
1867 netif_stop_queue(netdev);
1868 del_timer_sync(&card->tx_timer);
1870 /* disable/mask all interrupts */
1871 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1872 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1873 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1875 /* free_irq(netdev->irq, netdev);*/
1876 free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
1878 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1879 SPIDER_NET_DMA_TX_FEND_VALUE);
1881 /* turn off DMA, force end */
1882 spider_net_disable_rxdmac(card);
1884 /* release chains */
1885 if (spin_trylock(&card->tx_chain.lock)) {
1886 spider_net_release_tx_chain(card, 1);
1887 spin_unlock(&card->tx_chain.lock);
1890 spider_net_free_chain(card, &card->tx_chain);
1891 spider_net_free_chain(card, &card->rx_chain);
1897 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1898 * function (to be called not under interrupt status)
1899 * @data: data, is interface device structure
1901 * called as task when tx hangs, resets interface (if interface is up)
1904 spider_net_tx_timeout_task(void *data)
1906 struct net_device *netdev = data;
1907 struct spider_net_card *card = netdev_priv(netdev);
1909 if (!(netdev->flags & IFF_UP))
1912 netif_device_detach(netdev);
1913 spider_net_stop(netdev);
1915 spider_net_workaround_rxramfull(card);
1916 spider_net_init_card(card);
1918 if (spider_net_setup_phy(card))
1920 if (spider_net_init_firmware(card))
1923 spider_net_open(netdev);
1924 spider_net_kick_tx_dma(card);
1925 netif_device_attach(netdev);
1928 atomic_dec(&card->tx_timeout_task_counter);
1932 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1933 * @netdev: interface device structure
1935 * called, if tx hangs. Schedules a task that resets the interface
1938 spider_net_tx_timeout(struct net_device *netdev)
1940 struct spider_net_card *card;
1942 card = netdev_priv(netdev);
1943 atomic_inc(&card->tx_timeout_task_counter);
1944 if (netdev->flags & IFF_UP)
1945 schedule_work(&card->tx_timeout_task);
1947 atomic_dec(&card->tx_timeout_task_counter);
1948 card->spider_stats.tx_timeouts++;
1952 * spider_net_setup_netdev_ops - initialization of net_device operations
1953 * @netdev: net_device structure
1955 * fills out function pointers in the net_device structure
1958 spider_net_setup_netdev_ops(struct net_device *netdev)
1960 netdev->open = &spider_net_open;
1961 netdev->stop = &spider_net_stop;
1962 netdev->hard_start_xmit = &spider_net_xmit;
1963 netdev->get_stats = &spider_net_get_stats;
1964 netdev->set_multicast_list = &spider_net_set_multi;
1965 netdev->set_mac_address = &spider_net_set_mac;
1966 netdev->change_mtu = &spider_net_change_mtu;
1967 netdev->do_ioctl = &spider_net_do_ioctl;
1969 netdev->tx_timeout = &spider_net_tx_timeout;
1970 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
1972 netdev->poll = &spider_net_poll;
1973 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
1975 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
1976 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
1977 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
1978 #ifdef CONFIG_NET_POLL_CONTROLLER
1979 /* poll controller */
1980 netdev->poll_controller = &spider_net_poll_controller;
1981 #endif /* CONFIG_NET_POLL_CONTROLLER */
1983 netdev->ethtool_ops = &spider_net_ethtool_ops;
1987 * spider_net_setup_netdev - initialization of net_device
1988 * @card: card structure
1990 * Returns 0 on success or <0 on failure
1992 * spider_net_setup_netdev initializes the net_device structure
1995 spider_net_setup_netdev(struct spider_net_card *card)
1998 struct net_device *netdev = card->netdev;
1999 struct device_node *dn;
2000 struct sockaddr addr;
2003 SET_MODULE_OWNER(netdev);
2004 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2006 pci_set_drvdata(card->pdev, netdev);
2008 card->rxram_full_tl.data = (unsigned long) card;
2009 card->rxram_full_tl.func =
2010 (void (*)(unsigned long)) spider_net_handle_rxram_full;
2011 init_timer(&card->tx_timer);
2012 card->tx_timer.function =
2013 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2014 card->tx_timer.data = (unsigned long) card;
2015 netdev->irq = card->pdev->irq;
2017 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2019 card->tx_desc = tx_descriptors;
2020 card->rx_desc = rx_descriptors;
2022 spider_net_setup_netdev_ops(netdev);
2024 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
2025 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2026 * NETIF_F_HW_VLAN_FILTER */
2028 netdev->irq = card->pdev->irq;
2030 dn = pci_device_to_OF_node(card->pdev);
2034 mac = get_property(dn, "local-mac-address", NULL);
2037 memcpy(addr.sa_data, mac, ETH_ALEN);
2039 result = spider_net_set_mac(netdev, &addr);
2040 if ((result) && (netif_msg_probe(card)))
2041 pr_err("Failed to set MAC address: %i\n", result);
2043 result = register_netdev(netdev);
2045 if (netif_msg_probe(card))
2046 pr_err("Couldn't register net_device: %i\n",
2051 if (netif_msg_probe(card))
2052 pr_info("Initialized device %s.\n", netdev->name);
2058 * spider_net_alloc_card - allocates net_device and card structure
2060 * returns the card structure or NULL in case of errors
2062 * the card and net_device structures are linked to each other
2064 static struct spider_net_card *
2065 spider_net_alloc_card(void)
2067 struct net_device *netdev;
2068 struct spider_net_card *card;
2071 alloc_size = sizeof (*card) +
2072 sizeof (struct spider_net_descr) * rx_descriptors +
2073 sizeof (struct spider_net_descr) * tx_descriptors;
2074 netdev = alloc_etherdev(alloc_size);
2078 card = netdev_priv(netdev);
2079 card->netdev = netdev;
2080 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2081 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev);
2082 init_waitqueue_head(&card->waitq);
2083 atomic_set(&card->tx_timeout_task_counter, 0);
2089 * spider_net_undo_pci_setup - releases PCI ressources
2090 * @card: card structure
2092 * spider_net_undo_pci_setup releases the mapped regions
2095 spider_net_undo_pci_setup(struct spider_net_card *card)
2097 iounmap(card->regs);
2098 pci_release_regions(card->pdev);
2102 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2103 * @card: card structure
2106 * Returns the card structure or NULL if any errors occur
2108 * spider_net_setup_pci_dev initializes pdev and together with the
2109 * functions called in spider_net_open configures the device so that
2110 * data can be transferred over it
2111 * The net_device structure is attached to the card structure, if the
2112 * function returns without error.
2114 static struct spider_net_card *
2115 spider_net_setup_pci_dev(struct pci_dev *pdev)
2117 struct spider_net_card *card;
2118 unsigned long mmio_start, mmio_len;
2120 if (pci_enable_device(pdev)) {
2121 pr_err("Couldn't enable PCI device\n");
2125 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2126 pr_err("Couldn't find proper PCI device base address.\n");
2127 goto out_disable_dev;
2130 if (pci_request_regions(pdev, spider_net_driver_name)) {
2131 pr_err("Couldn't obtain PCI resources, aborting.\n");
2132 goto out_disable_dev;
2135 pci_set_master(pdev);
2137 card = spider_net_alloc_card();
2139 pr_err("Couldn't allocate net_device structure, "
2141 goto out_release_regions;
2145 /* fetch base address and length of first resource */
2146 mmio_start = pci_resource_start(pdev, 0);
2147 mmio_len = pci_resource_len(pdev, 0);
2149 card->netdev->mem_start = mmio_start;
2150 card->netdev->mem_end = mmio_start + mmio_len;
2151 card->regs = ioremap(mmio_start, mmio_len);
2154 pr_err("Couldn't obtain PCI resources, aborting.\n");
2155 goto out_release_regions;
2160 out_release_regions:
2161 pci_release_regions(pdev);
2163 pci_disable_device(pdev);
2164 pci_set_drvdata(pdev, NULL);
2169 * spider_net_probe - initialization of a device
2171 * @ent: entry in the device id list
2173 * Returns 0 on success, <0 on failure
2175 * spider_net_probe initializes pdev and registers a net_device
2176 * structure for it. After that, the device can be ifconfig'ed up
2178 static int __devinit
2179 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2182 struct spider_net_card *card;
2184 card = spider_net_setup_pci_dev(pdev);
2188 spider_net_workaround_rxramfull(card);
2189 spider_net_init_card(card);
2191 err = spider_net_setup_phy(card);
2195 err = spider_net_init_firmware(card);
2199 err = spider_net_setup_netdev(card);
2206 spider_net_undo_pci_setup(card);
2207 free_netdev(card->netdev);
2213 * spider_net_remove - removal of a device
2216 * Returns 0 on success, <0 on failure
2218 * spider_net_remove is called to remove the device and unregisters the
2221 static void __devexit
2222 spider_net_remove(struct pci_dev *pdev)
2224 struct net_device *netdev;
2225 struct spider_net_card *card;
2227 netdev = pci_get_drvdata(pdev);
2228 card = netdev_priv(netdev);
2230 wait_event(card->waitq,
2231 atomic_read(&card->tx_timeout_task_counter) == 0);
2233 unregister_netdev(netdev);
2235 /* switch off card */
2236 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2237 SPIDER_NET_CKRCTRL_STOP_VALUE);
2238 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2239 SPIDER_NET_CKRCTRL_RUN_VALUE);
2241 spider_net_undo_pci_setup(card);
2242 free_netdev(netdev);
2245 static struct pci_driver spider_net_driver = {
2246 .name = spider_net_driver_name,
2247 .id_table = spider_net_pci_tbl,
2248 .probe = spider_net_probe,
2249 .remove = __devexit_p(spider_net_remove)
2253 * spider_net_init - init function when the driver is loaded
2255 * spider_net_init registers the device driver
2257 static int __init spider_net_init(void)
2259 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2261 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2262 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2263 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2265 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2266 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2267 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2269 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2270 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2271 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2273 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2274 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2275 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2278 return pci_register_driver(&spider_net_driver);
2282 * spider_net_cleanup - exit function when driver is unloaded
2284 * spider_net_cleanup unregisters the device driver
2286 static void __exit spider_net_cleanup(void)
2288 pci_unregister_driver(&spider_net_driver);
2291 module_init(spider_net_init);
2292 module_exit(spider_net_cleanup);