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)
91 /* We use the powerpc specific variants instead of readl_be() because
92 * we know spidernet is not a real PCI device and we can thus avoid the
93 * performance hit caused by the PCI workarounds.
95 return in_be32(card->regs + reg);
99 * spider_net_write_reg - writes to an SMMIO register of a card
100 * @card: device structure
101 * @reg: register to write to
102 * @value: value to write into the specified SMMIO register
105 spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
107 /* We use the powerpc specific variants instead of writel_be() because
108 * we know spidernet is not a real PCI device and we can thus avoid the
109 * performance hit caused by the PCI workarounds.
111 out_be32(card->regs + reg, value);
114 /** spider_net_write_phy - write to phy register
115 * @netdev: adapter to be written to
118 * @val: value to be written to phy register
120 * spider_net_write_phy_register writes to an arbitrary PHY
121 * register via the spider GPCWOPCMD register. We assume the queue does
122 * not run full (not more than 15 commands outstanding).
125 spider_net_write_phy(struct net_device *netdev, int mii_id,
128 struct spider_net_card *card = netdev_priv(netdev);
131 writevalue = ((u32)mii_id << 21) |
132 ((u32)reg << 16) | ((u32)val);
134 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
137 /** spider_net_read_phy - read from phy register
138 * @netdev: network device to be read from
142 * Returns value read from PHY register
144 * spider_net_write_phy reads from an arbitrary PHY
145 * register via the spider GPCROPCMD register
148 spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
150 struct spider_net_card *card = netdev_priv(netdev);
153 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
154 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
156 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
157 * interrupt, as we poll for the completion of the read operation
158 * in spider_net_read_phy. Should take about 50 us */
160 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
161 } while (readvalue & SPIDER_NET_GPREXEC);
163 readvalue &= SPIDER_NET_GPRDAT_MASK;
169 * spider_net_rx_irq_off - switch off rx irq on this spider card
170 * @card: device structure
172 * switches off rx irq by masking them out in the GHIINTnMSK register
175 spider_net_rx_irq_off(struct spider_net_card *card)
179 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
180 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
184 * spider_net_rx_irq_on - switch on rx irq on this spider card
185 * @card: device structure
187 * switches on rx irq by enabling them in the GHIINTnMSK register
190 spider_net_rx_irq_on(struct spider_net_card *card)
194 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
195 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
199 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
200 * @card: card structure
202 * spider_net_set_promisc sets the unicast destination address filter and
203 * thus either allows for non-promisc mode or promisc mode
206 spider_net_set_promisc(struct spider_net_card *card)
209 struct net_device *netdev = card->netdev;
211 if (netdev->flags & IFF_PROMISC) {
212 /* clear destination entry 0 */
213 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
214 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
215 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
216 SPIDER_NET_PROMISC_VALUE);
218 macu = netdev->dev_addr[0];
220 macu |= netdev->dev_addr[1];
221 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
223 macu |= SPIDER_NET_UA_DESCR_VALUE;
224 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
225 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
226 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
227 SPIDER_NET_NONPROMISC_VALUE);
232 * spider_net_get_mac_address - read mac address from spider card
233 * @card: device structure
235 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
238 spider_net_get_mac_address(struct net_device *netdev)
240 struct spider_net_card *card = netdev_priv(netdev);
243 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
244 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
246 netdev->dev_addr[0] = (macu >> 24) & 0xff;
247 netdev->dev_addr[1] = (macu >> 16) & 0xff;
248 netdev->dev_addr[2] = (macu >> 8) & 0xff;
249 netdev->dev_addr[3] = macu & 0xff;
250 netdev->dev_addr[4] = (macl >> 8) & 0xff;
251 netdev->dev_addr[5] = macl & 0xff;
253 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
260 * spider_net_get_descr_status -- returns the status of a descriptor
261 * @descr: descriptor to look at
263 * returns the status as in the dmac_cmd_status field of the descriptor
266 spider_net_get_descr_status(struct spider_net_descr *descr)
268 return descr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
272 * spider_net_free_chain - free descriptor chain
273 * @card: card structure
274 * @chain: address of chain
278 spider_net_free_chain(struct spider_net_card *card,
279 struct spider_net_descr_chain *chain)
281 struct spider_net_descr *descr;
286 descr->next_descr_addr = 0;
288 } while (descr != chain->ring);
290 dma_free_coherent(&card->pdev->dev, chain->num_desc,
291 chain->ring, chain->dma_addr);
295 * spider_net_init_chain - alloc and link descriptor chain
296 * @card: card structure
297 * @chain: address of chain
299 * We manage a circular list that mirrors the hardware structure,
300 * except that the hardware uses bus addresses.
302 * Returns 0 on success, <0 on failure
305 spider_net_init_chain(struct spider_net_card *card,
306 struct spider_net_descr_chain *chain)
309 struct spider_net_descr *descr;
313 alloc_size = chain->num_desc * sizeof (struct spider_net_descr);
315 chain->ring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
316 &chain->dma_addr, GFP_KERNEL);
322 memset(descr, 0, alloc_size);
324 /* Set up the hardware pointers in each descriptor */
325 buf = chain->dma_addr;
326 for (i=0; i < chain->num_desc; i++, descr++) {
327 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
329 descr->bus_addr = buf;
330 descr->next_descr_addr = 0;
331 descr->next = descr + 1;
332 descr->prev = descr - 1;
334 buf += sizeof(struct spider_net_descr);
336 /* do actual circular list */
337 (descr-1)->next = chain->ring;
338 chain->ring->prev = descr-1;
340 spin_lock_init(&chain->lock);
341 chain->head = chain->ring;
342 chain->tail = chain->ring;
347 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
348 * @card: card structure
350 * returns 0 on success, <0 on failure
353 spider_net_free_rx_chain_contents(struct spider_net_card *card)
355 struct spider_net_descr *descr;
357 descr = card->rx_chain.head;
360 dev_kfree_skb(descr->skb);
361 pci_unmap_single(card->pdev, descr->buf_addr,
362 SPIDER_NET_MAX_FRAME,
363 PCI_DMA_BIDIRECTIONAL);
366 } while (descr != card->rx_chain.head);
370 * spider_net_prepare_rx_descr - reinitializes a rx descriptor
371 * @card: card structure
372 * @descr: descriptor to re-init
374 * return 0 on succes, <0 on failure
376 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
377 * Activate the descriptor state-wise
380 spider_net_prepare_rx_descr(struct spider_net_card *card,
381 struct spider_net_descr *descr)
388 /* we need to round up the buffer size to a multiple of 128 */
389 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
390 (~(SPIDER_NET_RXBUF_ALIGN - 1));
392 /* and we need to have it 128 byte aligned, therefore we allocate a
394 /* allocate an skb */
395 descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
397 if (netif_msg_rx_err(card) && net_ratelimit())
398 pr_err("Not enough memory to allocate rx buffer\n");
399 card->spider_stats.alloc_rx_skb_error++;
402 descr->buf_size = bufsize;
403 descr->result_size = 0;
404 descr->valid_size = 0;
405 descr->data_status = 0;
406 descr->data_error = 0;
408 offset = ((unsigned long)descr->skb->data) &
409 (SPIDER_NET_RXBUF_ALIGN - 1);
411 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
412 /* io-mmu-map the skb */
413 buf = pci_map_single(card->pdev, descr->skb->data,
414 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
415 descr->buf_addr = buf;
416 if (pci_dma_mapping_error(buf)) {
417 dev_kfree_skb_any(descr->skb);
418 if (netif_msg_rx_err(card) && net_ratelimit())
419 pr_err("Could not iommu-map rx buffer\n");
420 card->spider_stats.rx_iommu_map_error++;
421 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
423 descr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
424 SPIDER_NET_DMAC_NOINTR_COMPLETE;
431 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
432 * @card: card structure
434 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
435 * chip by writing to the appropriate register. DMA is enabled in
436 * spider_net_enable_rxdmac.
439 spider_net_enable_rxchtails(struct spider_net_card *card)
441 /* assume chain is aligned correctly */
442 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
443 card->rx_chain.tail->bus_addr);
447 * spider_net_enable_rxdmac - enables a receive DMA controller
448 * @card: card structure
450 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
451 * in the GDADMACCNTR register
454 spider_net_enable_rxdmac(struct spider_net_card *card)
457 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
458 SPIDER_NET_DMA_RX_VALUE);
462 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
463 * @card: card structure
465 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
468 spider_net_refill_rx_chain(struct spider_net_card *card)
470 struct spider_net_descr_chain *chain = &card->rx_chain;
473 /* one context doing the refill (and a second context seeing that
474 * and omitting it) is ok. If called by NAPI, we'll be called again
475 * as spider_net_decode_one_descr is called several times. If some
476 * interrupt calls us, the NAPI is about to clean up anyway. */
477 if (!spin_trylock_irqsave(&chain->lock, flags))
480 while (spider_net_get_descr_status(chain->head) ==
481 SPIDER_NET_DESCR_NOT_IN_USE) {
482 if (spider_net_prepare_rx_descr(card, chain->head))
484 chain->head = chain->head->next;
487 spin_unlock_irqrestore(&chain->lock, flags);
491 * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
492 * @card: card structure
494 * returns 0 on success, <0 on failure
497 spider_net_alloc_rx_skbs(struct spider_net_card *card)
500 struct spider_net_descr_chain *chain;
504 chain = &card->rx_chain;
505 /* put at least one buffer into the chain. if this fails,
506 * we've got a problem. if not, spider_net_refill_rx_chain
507 * will do the rest at the end of this function */
508 if (spider_net_prepare_rx_descr(card, chain->head))
511 chain->head = chain->head->next;
513 /* this will allocate the rest of the rx buffers; if not, it's
514 * business as usual later on */
515 spider_net_refill_rx_chain(card);
516 spider_net_enable_rxdmac(card);
520 spider_net_free_rx_chain_contents(card);
525 * spider_net_get_multicast_hash - generates hash for multicast filter table
526 * @addr: multicast address
528 * returns the hash value.
530 * spider_net_get_multicast_hash calculates a hash value for a given multicast
531 * address, that is used to set the multicast filter tables
534 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
538 char addr_for_crc[ETH_ALEN] = { 0, };
541 for (i = 0; i < ETH_ALEN * 8; i++) {
542 bit = (addr[i / 8] >> (i % 8)) & 1;
543 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
546 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
557 * spider_net_set_multi - sets multicast addresses and promisc flags
558 * @netdev: interface device structure
560 * spider_net_set_multi configures multicast addresses as needed for the
561 * netdev interface. It also sets up multicast, allmulti and promisc
562 * flags appropriately
565 spider_net_set_multi(struct net_device *netdev)
567 struct dev_mc_list *mc;
571 struct spider_net_card *card = netdev_priv(netdev);
572 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
575 spider_net_set_promisc(card);
577 if (netdev->flags & IFF_ALLMULTI) {
578 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
584 /* well, we know, what the broadcast hash value is: it's xfd
585 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
586 set_bit(0xfd, bitmask);
588 for (mc = netdev->mc_list; mc; mc = mc->next) {
589 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
590 set_bit(hash, bitmask);
594 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
596 if (test_bit(i * 4, bitmask))
599 if (test_bit(i * 4 + 1, bitmask))
602 if (test_bit(i * 4 + 2, bitmask))
605 if (test_bit(i * 4 + 3, bitmask))
608 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
613 * spider_net_disable_rxdmac - disables the receive DMA controller
614 * @card: card structure
616 * spider_net_disable_rxdmac terminates processing on the DMA controller by
617 * turing off DMA and issueing a force end
620 spider_net_disable_rxdmac(struct spider_net_card *card)
622 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
623 SPIDER_NET_DMA_RX_FEND_VALUE);
627 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
628 * @card: card structure
629 * @descr: descriptor structure to fill out
630 * @skb: packet to use
632 * returns 0 on success, <0 on failure.
634 * fills out the descriptor structure with skb data and len. Copies data,
635 * if needed (32bit DMA!)
638 spider_net_prepare_tx_descr(struct spider_net_card *card,
641 struct spider_net_descr *descr;
645 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
646 if (pci_dma_mapping_error(buf)) {
647 if (netif_msg_tx_err(card) && net_ratelimit())
648 pr_err("could not iommu-map packet (%p, %i). "
649 "Dropping packet\n", skb->data, skb->len);
650 card->spider_stats.tx_iommu_map_error++;
654 spin_lock_irqsave(&card->tx_chain.lock, flags);
655 descr = card->tx_chain.head;
656 card->tx_chain.head = descr->next;
658 descr->buf_addr = buf;
659 descr->buf_size = skb->len;
660 descr->next_descr_addr = 0;
662 descr->data_status = 0;
664 descr->dmac_cmd_status =
665 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
666 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
668 if (skb->protocol == htons(ETH_P_IP))
669 switch (skb->nh.iph->protocol) {
671 descr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
674 descr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
678 /* Chain the bus address, so that the DMA engine finds this descr. */
679 descr->prev->next_descr_addr = descr->bus_addr;
681 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
686 spider_net_set_low_watermark(struct spider_net_card *card)
692 struct spider_net_descr *descr = card->tx_chain.tail;
694 /* Measure the length of the queue. Measurement does not
695 * need to be precise -- does not need a lock. */
696 while (descr != card->tx_chain.head) {
697 status = descr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
698 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
704 /* If TX queue is short, don't even bother with interrupts */
705 if (cnt < card->tx_chain.num_desc/4)
708 /* Set low-watermark 3/4th's of the way into the queue. */
709 descr = card->tx_chain.tail;
714 /* Set the new watermark, clear the old watermark */
715 spin_lock_irqsave(&card->tx_chain.lock, flags);
716 descr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
717 if (card->low_watermark && card->low_watermark != descr)
718 card->low_watermark->dmac_cmd_status =
719 card->low_watermark->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
720 card->low_watermark = descr;
721 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
726 * spider_net_release_tx_chain - processes sent tx descriptors
727 * @card: adapter structure
728 * @brutal: if set, don't care about whether descriptor seems to be in use
730 * returns 0 if the tx ring is empty, otherwise 1.
732 * spider_net_release_tx_chain releases the tx descriptors that spider has
733 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
734 * If some other context is calling this function, we return 1 so that we're
735 * scheduled again (if we were scheduled) and will not loose initiative.
738 spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
740 struct spider_net_descr_chain *chain = &card->tx_chain;
741 struct spider_net_descr *descr;
747 while (chain->tail != chain->head) {
748 spin_lock_irqsave(&chain->lock, flags);
751 status = spider_net_get_descr_status(descr);
753 case SPIDER_NET_DESCR_COMPLETE:
754 card->netdev_stats.tx_packets++;
755 card->netdev_stats.tx_bytes += descr->skb->len;
758 case SPIDER_NET_DESCR_CARDOWNED:
760 spin_unlock_irqrestore(&chain->lock, flags);
764 /* fallthrough, if we release the descriptors
765 * brutally (then we don't care about
766 * SPIDER_NET_DESCR_CARDOWNED) */
768 case SPIDER_NET_DESCR_RESPONSE_ERROR:
769 case SPIDER_NET_DESCR_PROTECTION_ERROR:
770 case SPIDER_NET_DESCR_FORCE_END:
771 if (netif_msg_tx_err(card))
772 pr_err("%s: forcing end of tx descriptor "
773 "with status x%02x\n",
774 card->netdev->name, status);
775 card->netdev_stats.tx_errors++;
779 card->netdev_stats.tx_dropped++;
781 spin_unlock_irqrestore(&chain->lock, flags);
786 chain->tail = descr->next;
787 descr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
789 buf_addr = descr->buf_addr;
790 spin_unlock_irqrestore(&chain->lock, flags);
794 pci_unmap_single(card->pdev, buf_addr, skb->len,
803 * spider_net_kick_tx_dma - enables TX DMA processing
804 * @card: card structure
805 * @descr: descriptor address to enable TX processing at
807 * This routine will start the transmit DMA running if
808 * it is not already running. This routine ned only be
809 * called when queueing a new packet to an empty tx queue.
810 * Writes the current tx chain head as start address
811 * of the tx descriptor chain and enables the transmission
815 spider_net_kick_tx_dma(struct spider_net_card *card)
817 struct spider_net_descr *descr;
819 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
820 SPIDER_NET_TX_DMA_EN)
823 descr = card->tx_chain.tail;
825 if (spider_net_get_descr_status(descr) ==
826 SPIDER_NET_DESCR_CARDOWNED) {
827 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
829 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
830 SPIDER_NET_DMA_TX_VALUE);
833 if (descr == card->tx_chain.head)
839 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
843 * spider_net_xmit - transmits a frame over the device
844 * @skb: packet to send out
845 * @netdev: interface device structure
847 * returns 0 on success, !0 on failure
850 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
853 struct spider_net_card *card = netdev_priv(netdev);
854 struct spider_net_descr_chain *chain = &card->tx_chain;
856 spider_net_release_tx_chain(card, 0);
858 if ((chain->head->next == chain->tail->prev) ||
859 (spider_net_prepare_tx_descr(card, skb) != 0)) {
861 card->netdev_stats.tx_dropped++;
862 netif_stop_queue(netdev);
863 return NETDEV_TX_BUSY;
866 cnt = spider_net_set_low_watermark(card);
868 spider_net_kick_tx_dma(card);
873 * spider_net_cleanup_tx_ring - cleans up the TX ring
874 * @card: card structure
876 * spider_net_cleanup_tx_ring is called by either the tx_timer
877 * or from the NAPI polling routine.
878 * This routine releases resources associted with transmitted
879 * packets, including updating the queue tail pointer.
882 spider_net_cleanup_tx_ring(struct spider_net_card *card)
884 if ((spider_net_release_tx_chain(card, 0) != 0) &&
885 (card->netdev->flags & IFF_UP)) {
886 spider_net_kick_tx_dma(card);
887 netif_wake_queue(card->netdev);
892 * spider_net_do_ioctl - called for device ioctls
893 * @netdev: interface device structure
894 * @ifr: request parameter structure for ioctl
895 * @cmd: command code for ioctl
897 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
898 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
901 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
910 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
911 * @descr: descriptor to process
912 * @card: card structure
914 * returns 1 on success, 0 if no packet was passed to the stack
916 * Fills out skb structure and passes the data to the stack.
917 * The descriptor state is not changed.
920 spider_net_pass_skb_up(struct spider_net_descr *descr,
921 struct spider_net_card *card)
924 struct net_device *netdev;
925 u32 data_status, data_error;
927 data_status = descr->data_status;
928 data_error = descr->data_error;
930 netdev = card->netdev;
932 /* the cases we'll throw away the packet immediately */
933 if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
934 if (netif_msg_rx_err(card))
935 pr_err("error in received descriptor found, "
936 "data_status=x%08x, data_error=x%08x\n",
937 data_status, data_error);
938 card->spider_stats.rx_desc_error++;
944 skb_put(skb, descr->valid_size);
946 /* the card seems to add 2 bytes of junk in front
947 * of the ethernet frame */
948 #define SPIDER_MISALIGN 2
949 skb_pull(skb, SPIDER_MISALIGN);
950 skb->protocol = eth_type_trans(skb, netdev);
952 /* checksum offload */
953 if (card->options.rx_csum) {
954 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
955 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
956 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
957 skb->ip_summed = CHECKSUM_UNNECESSARY;
959 skb->ip_summed = CHECKSUM_NONE;
961 skb->ip_summed = CHECKSUM_NONE;
963 if (data_status & SPIDER_NET_VLAN_PACKET) {
964 /* further enhancements: HW-accel VLAN
965 * vlan_hwaccel_receive_skb
969 /* pass skb up to stack */
970 netif_receive_skb(skb);
972 /* update netdevice statistics */
973 card->netdev_stats.rx_packets++;
974 card->netdev_stats.rx_bytes += skb->len;
980 * spider_net_decode_one_descr - processes an rx descriptor
981 * @card: card structure
983 * Returns 1 if a packet has been sent to the stack, otherwise 0
985 * Processes an rx descriptor by iommu-unmapping the data buffer and passing
986 * the packet up to the stack. This function is called in softirq
987 * context, e.g. either bottom half from interrupt or NAPI polling context
990 spider_net_decode_one_descr(struct spider_net_card *card)
992 struct spider_net_descr_chain *chain = &card->rx_chain;
993 struct spider_net_descr *descr = chain->tail;
997 status = spider_net_get_descr_status(descr);
999 /* nothing in the descriptor yet */
1000 if (status == SPIDER_NET_DESCR_CARDOWNED)
1003 if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
1004 /* not initialized yet, the ring must be empty */
1005 spider_net_refill_rx_chain(card);
1006 spider_net_enable_rxdmac(card);
1010 /* descriptor definitively used -- move on tail */
1011 chain->tail = descr->next;
1015 /* unmap descriptor */
1016 pci_unmap_single(card->pdev, descr->buf_addr,
1017 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1019 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1020 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1021 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1022 if (netif_msg_rx_err(card))
1023 pr_err("%s: dropping RX descriptor with state %d\n",
1024 card->netdev->name, status);
1025 card->netdev_stats.rx_dropped++;
1026 dev_kfree_skb_irq(descr->skb);
1030 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1031 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1032 if (netif_msg_rx_err(card))
1033 pr_err("%s: RX descriptor with unkown state %d\n",
1034 card->netdev->name, status);
1035 card->spider_stats.rx_desc_unk_state++;
1036 dev_kfree_skb_irq(descr->skb);
1040 /* ok, we've got a packet in descr */
1041 result = spider_net_pass_skb_up(descr, card);
1043 /* change the descriptor state: */
1044 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
1049 * spider_net_poll - NAPI poll function called by the stack to return packets
1050 * @netdev: interface device structure
1051 * @budget: number of packets we can pass to the stack at most
1053 * returns 0 if no more packets available to the driver/stack. Returns 1,
1054 * if the quota is exceeded, but the driver has still packets.
1056 * spider_net_poll returns all packets from the rx descriptors to the stack
1057 * (using netif_receive_skb). If all/enough packets are up, the driver
1058 * reenables interrupts and returns 0. If not, 1 is returned.
1061 spider_net_poll(struct net_device *netdev, int *budget)
1063 struct spider_net_card *card = netdev_priv(netdev);
1064 int packets_to_do, packets_done = 0;
1065 int no_more_packets = 0;
1067 spider_net_cleanup_tx_ring(card);
1068 packets_to_do = min(*budget, netdev->quota);
1070 while (packets_to_do) {
1071 if (spider_net_decode_one_descr(card)) {
1075 /* no more packets for the stack */
1076 no_more_packets = 1;
1081 netdev->quota -= packets_done;
1082 *budget -= packets_done;
1083 spider_net_refill_rx_chain(card);
1085 /* if all packets are in the stack, enable interrupts and return 0 */
1086 /* if not, return 1 */
1087 if (no_more_packets) {
1088 netif_rx_complete(netdev);
1089 spider_net_rx_irq_on(card);
1097 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1098 * @netdev: interface device structure
1099 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1102 spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1104 /* further enhancement... yet to do */
1109 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1110 * @netdev: interface device structure
1111 * @vid: VLAN id to add
1114 spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1116 /* further enhancement... yet to do */
1117 /* add vid to card's VLAN filter table */
1122 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1123 * @netdev: interface device structure
1124 * @vid: VLAN id to remove
1127 spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1129 /* further enhancement... yet to do */
1130 /* remove vid from card's VLAN filter table */
1134 * spider_net_get_stats - get interface statistics
1135 * @netdev: interface device structure
1137 * returns the interface statistics residing in the spider_net_card struct
1139 static struct net_device_stats *
1140 spider_net_get_stats(struct net_device *netdev)
1142 struct spider_net_card *card = netdev_priv(netdev);
1143 struct net_device_stats *stats = &card->netdev_stats;
1148 * spider_net_change_mtu - changes the MTU of an interface
1149 * @netdev: interface device structure
1150 * @new_mtu: new MTU value
1152 * returns 0 on success, <0 on failure
1155 spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1157 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1158 * and mtu is outbound only anyway */
1159 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1160 (new_mtu > SPIDER_NET_MAX_MTU) )
1162 netdev->mtu = new_mtu;
1167 * spider_net_set_mac - sets the MAC of an interface
1168 * @netdev: interface device structure
1169 * @ptr: pointer to new MAC address
1171 * Returns 0 on success, <0 on failure. Currently, we don't support this
1172 * and will always return EOPNOTSUPP.
1175 spider_net_set_mac(struct net_device *netdev, void *p)
1177 struct spider_net_card *card = netdev_priv(netdev);
1178 u32 macl, macu, regvalue;
1179 struct sockaddr *addr = p;
1181 if (!is_valid_ether_addr(addr->sa_data))
1182 return -EADDRNOTAVAIL;
1184 /* switch off GMACTPE and GMACRPE */
1185 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1186 regvalue &= ~((1 << 5) | (1 << 6));
1187 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1190 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1191 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1192 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1193 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1194 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1196 /* switch GMACTPE and GMACRPE back on */
1197 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1198 regvalue |= ((1 << 5) | (1 << 6));
1199 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1201 spider_net_set_promisc(card);
1203 /* look up, whether we have been successful */
1204 if (spider_net_get_mac_address(netdev))
1205 return -EADDRNOTAVAIL;
1206 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1207 return -EADDRNOTAVAIL;
1213 * spider_net_handle_error_irq - handles errors raised by an interrupt
1214 * @card: card structure
1215 * @status_reg: interrupt status register 0 (GHIINT0STS)
1217 * spider_net_handle_error_irq treats or ignores all error conditions
1218 * found when an interrupt is presented
1221 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1223 u32 error_reg1, error_reg2;
1227 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1228 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1230 /* check GHIINT0STS ************************************/
1232 for (i = 0; i < 32; i++)
1233 if (status_reg & (1<<i))
1236 /* let error_reg1 and error_reg2 evaluation decide, what to do
1237 case SPIDER_NET_PHYINT:
1238 case SPIDER_NET_GMAC2INT:
1239 case SPIDER_NET_GMAC1INT:
1240 case SPIDER_NET_GFIFOINT:
1241 case SPIDER_NET_DMACINT:
1242 case SPIDER_NET_GSYSINT:
1245 case SPIDER_NET_GIPSINT:
1249 case SPIDER_NET_GPWOPCMPINT:
1250 /* PHY write operation completed */
1253 case SPIDER_NET_GPROPCMPINT:
1254 /* PHY read operation completed */
1255 /* we don't use semaphores, as we poll for the completion
1256 * of the read operation in spider_net_read_phy. Should take
1260 case SPIDER_NET_GPWFFINT:
1261 /* PHY command queue full */
1262 if (netif_msg_intr(card))
1263 pr_err("PHY write queue full\n");
1267 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1268 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1269 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1271 case SPIDER_NET_GDTDEN0INT:
1272 /* someone has set TX_DMA_EN to 0 */
1276 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1277 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1278 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1279 case SPIDER_NET_GDADEN0INT:
1280 /* someone has set RX_DMA_EN to 0 */
1285 case SPIDER_NET_GDDFDCINT:
1286 case SPIDER_NET_GDCFDCINT:
1287 case SPIDER_NET_GDBFDCINT:
1288 case SPIDER_NET_GDAFDCINT:
1289 /* case SPIDER_NET_GDNMINT: not used. print a message */
1290 /* case SPIDER_NET_GCNMINT: not used. print a message */
1291 /* case SPIDER_NET_GBNMINT: not used. print a message */
1292 /* case SPIDER_NET_GANMINT: not used. print a message */
1293 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1298 case SPIDER_NET_GDTFDCINT:
1301 case SPIDER_NET_GTTEDINT:
1304 case SPIDER_NET_GDTDCEINT:
1305 /* chain end. If a descriptor should be sent, kick off
1307 if (card->tx_chain.tail != card->tx_chain.head)
1308 spider_net_kick_tx_dma(card);
1313 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1314 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1317 /* check GHIINT1STS ************************************/
1319 for (i = 0; i < 32; i++)
1320 if (error_reg1 & (1<<i))
1323 case SPIDER_NET_GTMFLLINT:
1324 if (netif_msg_intr(card) && net_ratelimit())
1325 pr_err("Spider TX RAM full\n");
1328 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1329 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1330 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1331 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
1332 case SPIDER_NET_GRMFLLINT:
1333 if (netif_msg_intr(card) && net_ratelimit())
1334 pr_err("Spider RX RAM full, incoming packets "
1335 "might be discarded!\n");
1336 spider_net_rx_irq_off(card);
1337 netif_rx_schedule(card->netdev);
1341 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1342 case SPIDER_NET_GDTINVDINT:
1343 /* allrighty. tx from previous descr ok */
1348 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1349 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1350 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1351 case SPIDER_NET_GDADCEINT:
1352 if (netif_msg_intr(card) && net_ratelimit())
1353 pr_err("got descriptor chain end interrupt, "
1354 "restarting DMAC %c.\n",
1355 'D'-(i-SPIDER_NET_GDDDCEINT)/3);
1356 spider_net_refill_rx_chain(card);
1357 spider_net_enable_rxdmac(card);
1361 /* invalid descriptor */
1362 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1363 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1364 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1365 case SPIDER_NET_GDAINVDINT:
1366 /* could happen when rx chain is full */
1367 spider_net_refill_rx_chain(card);
1368 spider_net_enable_rxdmac(card);
1372 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1373 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1374 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1375 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1376 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1377 /* case SPIDER_NET_GDSERINT: problem, print a message */
1378 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1379 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1380 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1381 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1382 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1388 /* check GHIINT2STS ************************************/
1390 for (i = 0; i < 32; i++)
1391 if (error_reg2 & (1<<i))
1394 /* there is nothing we can (want to) do at this time. Log a
1395 * message, we can switch on and off the specific values later on
1396 case SPIDER_NET_GPROPERINT:
1397 case SPIDER_NET_GMCTCRSNGINT:
1398 case SPIDER_NET_GMCTLCOLINT:
1399 case SPIDER_NET_GMCTTMOTINT:
1400 case SPIDER_NET_GMCRCAERINT:
1401 case SPIDER_NET_GMCRCALERINT:
1402 case SPIDER_NET_GMCRALNERINT:
1403 case SPIDER_NET_GMCROVRINT:
1404 case SPIDER_NET_GMCRRNTINT:
1405 case SPIDER_NET_GMCRRXERINT:
1406 case SPIDER_NET_GTITCSERINT:
1407 case SPIDER_NET_GTIFMTERINT:
1408 case SPIDER_NET_GTIPKTRVKINT:
1409 case SPIDER_NET_GTISPINGINT:
1410 case SPIDER_NET_GTISADNGINT:
1411 case SPIDER_NET_GTISPDNGINT:
1412 case SPIDER_NET_GRIFMTERINT:
1413 case SPIDER_NET_GRIPKTRVKINT:
1414 case SPIDER_NET_GRISPINGINT:
1415 case SPIDER_NET_GRISADNGINT:
1416 case SPIDER_NET_GRISPDNGINT:
1423 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
1424 pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, "
1425 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1427 status_reg, error_reg1, error_reg2);
1429 /* clear interrupt sources */
1430 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1431 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1435 * spider_net_interrupt - interrupt handler for spider_net
1436 * @irq: interupt number
1437 * @ptr: pointer to net_device
1438 * @regs: PU registers
1440 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1441 * interrupt found raised by card.
1443 * This is the interrupt handler, that turns off
1444 * interrupts for this device and makes the stack poll the driver
1447 spider_net_interrupt(int irq, void *ptr)
1449 struct net_device *netdev = ptr;
1450 struct spider_net_card *card = netdev_priv(netdev);
1453 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1458 if (status_reg & SPIDER_NET_RXINT ) {
1459 spider_net_rx_irq_off(card);
1460 netif_rx_schedule(netdev);
1462 if (status_reg & SPIDER_NET_TXINT)
1463 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_GDTBSTA);
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);
1619 struct spider_net_descr *descr;
1622 result = spider_net_init_chain(card, &card->tx_chain);
1624 goto alloc_tx_failed;
1625 card->low_watermark = NULL;
1627 result = spider_net_init_chain(card, &card->rx_chain);
1629 goto alloc_rx_failed;
1631 /* Make a ring of of bus addresses */
1632 descr = card->rx_chain.ring;
1634 descr->next_descr_addr = descr->next->bus_addr;
1635 descr = descr->next;
1636 } while (descr != card->rx_chain.ring);
1638 /* Allocate rx skbs */
1639 if (spider_net_alloc_rx_skbs(card))
1640 goto alloc_skbs_failed;
1642 spider_net_set_multi(netdev);
1644 /* further enhancement: setup hw vlan, if needed */
1647 if (request_irq(netdev->irq, spider_net_interrupt,
1648 IRQF_SHARED, netdev->name, netdev))
1649 goto register_int_failed;
1651 spider_net_enable_card(card);
1653 netif_start_queue(netdev);
1654 netif_carrier_on(netdev);
1655 netif_poll_enable(netdev);
1659 register_int_failed:
1660 spider_net_free_rx_chain_contents(card);
1662 spider_net_free_chain(card, &card->rx_chain);
1664 spider_net_free_chain(card, &card->tx_chain);
1670 * spider_net_setup_phy - setup PHY
1671 * @card: card structure
1673 * returns 0 on success, <0 on failure
1675 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1676 * the PHY to 1000 Mbps
1679 spider_net_setup_phy(struct spider_net_card *card)
1681 struct mii_phy *phy = &card->phy;
1683 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1684 SPIDER_NET_DMASEL_VALUE);
1685 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1686 SPIDER_NET_PHY_CTRL_VALUE);
1688 phy->dev = card->netdev;
1689 phy->mdio_read = spider_net_read_phy;
1690 phy->mdio_write = spider_net_write_phy;
1692 mii_phy_probe(phy, phy->mii_id);
1694 if (phy->def->ops->setup_forced)
1695 phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
1697 phy->def->ops->enable_fiber(phy);
1699 phy->def->ops->read_link(phy);
1700 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
1701 phy->speed, phy->duplex==1 ? "Full" : "Half");
1707 * spider_net_download_firmware - loads firmware into the adapter
1708 * @card: card structure
1709 * @firmware_ptr: pointer to firmware data
1711 * spider_net_download_firmware loads the firmware data into the
1712 * adapter. It assumes the length etc. to be allright.
1715 spider_net_download_firmware(struct spider_net_card *card,
1716 const void *firmware_ptr)
1719 const u32 *fw_ptr = firmware_ptr;
1721 /* stop sequencers */
1722 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1723 SPIDER_NET_STOP_SEQ_VALUE);
1725 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1727 spider_net_write_reg(card,
1728 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1729 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1730 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1731 sequencer * 8, *fw_ptr);
1736 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1739 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1740 SPIDER_NET_RUN_SEQ_VALUE);
1746 * spider_net_init_firmware - reads in firmware parts
1747 * @card: card structure
1749 * Returns 0 on success, <0 on failure
1751 * spider_net_init_firmware opens the sequencer firmware and does some basic
1752 * checks. This function opens and releases the firmware structure. A call
1753 * to download the firmware is performed before the release.
1757 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1758 * the program for each sequencer. Use the command
1759 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1760 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1761 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1763 * to generate spider_fw.bin, if you have sequencer programs with something
1764 * like the following contents for each sequencer:
1765 * <ONE LINE COMMENT>
1766 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1767 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1769 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1772 spider_net_init_firmware(struct spider_net_card *card)
1774 struct firmware *firmware = NULL;
1775 struct device_node *dn;
1776 const u8 *fw_prop = NULL;
1780 if (request_firmware((const struct firmware **)&firmware,
1781 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1782 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1783 netif_msg_probe(card) ) {
1784 pr_err("Incorrect size of spidernet firmware in " \
1785 "filesystem. Looking in host firmware...\n");
1788 err = spider_net_download_firmware(card, firmware->data);
1790 release_firmware(firmware);
1798 dn = pci_device_to_OF_node(card->pdev);
1802 fw_prop = get_property(dn, "firmware", &fw_size);
1806 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1807 netif_msg_probe(card) ) {
1808 pr_err("Incorrect size of spidernet firmware in " \
1813 err = spider_net_download_firmware(card, fw_prop);
1818 if (netif_msg_probe(card))
1819 pr_err("Couldn't find spidernet firmware in filesystem " \
1820 "or host firmware\n");
1825 * spider_net_workaround_rxramfull - work around firmware bug
1826 * @card: card structure
1831 spider_net_workaround_rxramfull(struct spider_net_card *card)
1833 int i, sequencer = 0;
1836 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1837 SPIDER_NET_CKRCTRL_RUN_VALUE);
1839 /* empty sequencer data */
1840 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1842 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
1843 sequencer * 8, 0x0);
1844 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1845 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1846 sequencer * 8, 0x0);
1850 /* set sequencer operation */
1851 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
1854 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1855 SPIDER_NET_CKRCTRL_STOP_VALUE);
1859 * spider_net_stop - called upon ifconfig down
1860 * @netdev: interface device structure
1865 spider_net_stop(struct net_device *netdev)
1867 struct spider_net_card *card = netdev_priv(netdev);
1869 netif_poll_disable(netdev);
1870 netif_carrier_off(netdev);
1871 netif_stop_queue(netdev);
1872 del_timer_sync(&card->tx_timer);
1874 /* disable/mask all interrupts */
1875 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1876 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1877 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1879 /* free_irq(netdev->irq, netdev);*/
1880 free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
1882 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1883 SPIDER_NET_DMA_TX_FEND_VALUE);
1885 /* turn off DMA, force end */
1886 spider_net_disable_rxdmac(card);
1888 /* release chains */
1889 spider_net_release_tx_chain(card, 1);
1890 spider_net_free_rx_chain_contents(card);
1892 spider_net_free_rx_chain_contents(card);
1894 spider_net_free_chain(card, &card->tx_chain);
1895 spider_net_free_chain(card, &card->rx_chain);
1901 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1902 * function (to be called not under interrupt status)
1903 * @data: data, is interface device structure
1905 * called as task when tx hangs, resets interface (if interface is up)
1908 spider_net_tx_timeout_task(struct work_struct *work)
1910 struct spider_net_card *card =
1911 container_of(work, struct spider_net_card, tx_timeout_task);
1912 struct net_device *netdev = card->netdev;
1914 if (!(netdev->flags & IFF_UP))
1917 netif_device_detach(netdev);
1918 spider_net_stop(netdev);
1920 spider_net_workaround_rxramfull(card);
1921 spider_net_init_card(card);
1923 if (spider_net_setup_phy(card))
1925 if (spider_net_init_firmware(card))
1928 spider_net_open(netdev);
1929 spider_net_kick_tx_dma(card);
1930 netif_device_attach(netdev);
1933 atomic_dec(&card->tx_timeout_task_counter);
1937 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1938 * @netdev: interface device structure
1940 * called, if tx hangs. Schedules a task that resets the interface
1943 spider_net_tx_timeout(struct net_device *netdev)
1945 struct spider_net_card *card;
1947 card = netdev_priv(netdev);
1948 atomic_inc(&card->tx_timeout_task_counter);
1949 if (netdev->flags & IFF_UP)
1950 schedule_work(&card->tx_timeout_task);
1952 atomic_dec(&card->tx_timeout_task_counter);
1953 card->spider_stats.tx_timeouts++;
1957 * spider_net_setup_netdev_ops - initialization of net_device operations
1958 * @netdev: net_device structure
1960 * fills out function pointers in the net_device structure
1963 spider_net_setup_netdev_ops(struct net_device *netdev)
1965 netdev->open = &spider_net_open;
1966 netdev->stop = &spider_net_stop;
1967 netdev->hard_start_xmit = &spider_net_xmit;
1968 netdev->get_stats = &spider_net_get_stats;
1969 netdev->set_multicast_list = &spider_net_set_multi;
1970 netdev->set_mac_address = &spider_net_set_mac;
1971 netdev->change_mtu = &spider_net_change_mtu;
1972 netdev->do_ioctl = &spider_net_do_ioctl;
1974 netdev->tx_timeout = &spider_net_tx_timeout;
1975 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
1977 netdev->poll = &spider_net_poll;
1978 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
1980 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
1981 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
1982 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
1983 #ifdef CONFIG_NET_POLL_CONTROLLER
1984 /* poll controller */
1985 netdev->poll_controller = &spider_net_poll_controller;
1986 #endif /* CONFIG_NET_POLL_CONTROLLER */
1988 netdev->ethtool_ops = &spider_net_ethtool_ops;
1992 * spider_net_setup_netdev - initialization of net_device
1993 * @card: card structure
1995 * Returns 0 on success or <0 on failure
1997 * spider_net_setup_netdev initializes the net_device structure
2000 spider_net_setup_netdev(struct spider_net_card *card)
2003 struct net_device *netdev = card->netdev;
2004 struct device_node *dn;
2005 struct sockaddr addr;
2008 SET_MODULE_OWNER(netdev);
2009 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2011 pci_set_drvdata(card->pdev, netdev);
2013 init_timer(&card->tx_timer);
2014 card->tx_timer.function =
2015 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2016 card->tx_timer.data = (unsigned long) card;
2017 netdev->irq = card->pdev->irq;
2019 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2021 card->tx_chain.num_desc = tx_descriptors;
2022 card->rx_chain.num_desc = rx_descriptors;
2024 spider_net_setup_netdev_ops(netdev);
2026 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
2027 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2028 * NETIF_F_HW_VLAN_FILTER */
2030 netdev->irq = card->pdev->irq;
2032 dn = pci_device_to_OF_node(card->pdev);
2036 mac = get_property(dn, "local-mac-address", NULL);
2039 memcpy(addr.sa_data, mac, ETH_ALEN);
2041 result = spider_net_set_mac(netdev, &addr);
2042 if ((result) && (netif_msg_probe(card)))
2043 pr_err("Failed to set MAC address: %i\n", result);
2045 result = register_netdev(netdev);
2047 if (netif_msg_probe(card))
2048 pr_err("Couldn't register net_device: %i\n",
2053 if (netif_msg_probe(card))
2054 pr_info("Initialized device %s.\n", netdev->name);
2060 * spider_net_alloc_card - allocates net_device and card structure
2062 * returns the card structure or NULL in case of errors
2064 * the card and net_device structures are linked to each other
2066 static struct spider_net_card *
2067 spider_net_alloc_card(void)
2069 struct net_device *netdev;
2070 struct spider_net_card *card;
2072 netdev = alloc_etherdev(sizeof(struct spider_net_card));
2076 card = netdev_priv(netdev);
2077 card->netdev = netdev;
2078 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2079 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
2080 init_waitqueue_head(&card->waitq);
2081 atomic_set(&card->tx_timeout_task_counter, 0);
2087 * spider_net_undo_pci_setup - releases PCI ressources
2088 * @card: card structure
2090 * spider_net_undo_pci_setup releases the mapped regions
2093 spider_net_undo_pci_setup(struct spider_net_card *card)
2095 iounmap(card->regs);
2096 pci_release_regions(card->pdev);
2100 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2101 * @card: card structure
2104 * Returns the card structure or NULL if any errors occur
2106 * spider_net_setup_pci_dev initializes pdev and together with the
2107 * functions called in spider_net_open configures the device so that
2108 * data can be transferred over it
2109 * The net_device structure is attached to the card structure, if the
2110 * function returns without error.
2112 static struct spider_net_card *
2113 spider_net_setup_pci_dev(struct pci_dev *pdev)
2115 struct spider_net_card *card;
2116 unsigned long mmio_start, mmio_len;
2118 if (pci_enable_device(pdev)) {
2119 pr_err("Couldn't enable PCI device\n");
2123 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2124 pr_err("Couldn't find proper PCI device base address.\n");
2125 goto out_disable_dev;
2128 if (pci_request_regions(pdev, spider_net_driver_name)) {
2129 pr_err("Couldn't obtain PCI resources, aborting.\n");
2130 goto out_disable_dev;
2133 pci_set_master(pdev);
2135 card = spider_net_alloc_card();
2137 pr_err("Couldn't allocate net_device structure, "
2139 goto out_release_regions;
2143 /* fetch base address and length of first resource */
2144 mmio_start = pci_resource_start(pdev, 0);
2145 mmio_len = pci_resource_len(pdev, 0);
2147 card->netdev->mem_start = mmio_start;
2148 card->netdev->mem_end = mmio_start + mmio_len;
2149 card->regs = ioremap(mmio_start, mmio_len);
2152 pr_err("Couldn't obtain PCI resources, aborting.\n");
2153 goto out_release_regions;
2158 out_release_regions:
2159 pci_release_regions(pdev);
2161 pci_disable_device(pdev);
2162 pci_set_drvdata(pdev, NULL);
2167 * spider_net_probe - initialization of a device
2169 * @ent: entry in the device id list
2171 * Returns 0 on success, <0 on failure
2173 * spider_net_probe initializes pdev and registers a net_device
2174 * structure for it. After that, the device can be ifconfig'ed up
2176 static int __devinit
2177 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2180 struct spider_net_card *card;
2182 card = spider_net_setup_pci_dev(pdev);
2186 spider_net_workaround_rxramfull(card);
2187 spider_net_init_card(card);
2189 err = spider_net_setup_phy(card);
2193 err = spider_net_init_firmware(card);
2197 err = spider_net_setup_netdev(card);
2204 spider_net_undo_pci_setup(card);
2205 free_netdev(card->netdev);
2211 * spider_net_remove - removal of a device
2214 * Returns 0 on success, <0 on failure
2216 * spider_net_remove is called to remove the device and unregisters the
2219 static void __devexit
2220 spider_net_remove(struct pci_dev *pdev)
2222 struct net_device *netdev;
2223 struct spider_net_card *card;
2225 netdev = pci_get_drvdata(pdev);
2226 card = netdev_priv(netdev);
2228 wait_event(card->waitq,
2229 atomic_read(&card->tx_timeout_task_counter) == 0);
2231 unregister_netdev(netdev);
2233 /* switch off card */
2234 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2235 SPIDER_NET_CKRCTRL_STOP_VALUE);
2236 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2237 SPIDER_NET_CKRCTRL_RUN_VALUE);
2239 spider_net_undo_pci_setup(card);
2240 free_netdev(netdev);
2243 static struct pci_driver spider_net_driver = {
2244 .name = spider_net_driver_name,
2245 .id_table = spider_net_pci_tbl,
2246 .probe = spider_net_probe,
2247 .remove = __devexit_p(spider_net_remove)
2251 * spider_net_init - init function when the driver is loaded
2253 * spider_net_init registers the device driver
2255 static int __init spider_net_init(void)
2257 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2259 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2260 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2261 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2263 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2264 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2265 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2267 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2268 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2269 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2271 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2272 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2273 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2276 return pci_register_driver(&spider_net_driver);
2280 * spider_net_cleanup - exit function when driver is unloaded
2282 * spider_net_cleanup unregisters the device driver
2284 static void __exit spider_net_cleanup(void)
2286 pci_unregister_driver(&spider_net_driver);
2289 module_init(spider_net_init);
2290 module_exit(spider_net_cleanup);