spider_net.c 67 KB

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  1. /*
  2. * Network device driver for Cell Processor-Based Blade and Celleb platform
  3. *
  4. * (C) Copyright IBM Corp. 2005
  5. * (C) Copyright 2006 TOSHIBA CORPORATION
  6. *
  7. * Authors : Utz Bacher <utz.bacher@de.ibm.com>
  8. * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
  9. *
  10. * This program is free software; you can redistribute it and/or modify
  11. * it under the terms of the GNU General Public License as published by
  12. * the Free Software Foundation; either version 2, or (at your option)
  13. * any later version.
  14. *
  15. * This program is distributed in the hope that it will be useful,
  16. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18. * GNU General Public License for more details.
  19. *
  20. * You should have received a copy of the GNU General Public License
  21. * along with this program; if not, write to the Free Software
  22. * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23. */
  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>
  31. #include <linux/in.h>
  32. #include <linux/init.h>
  33. #include <linux/ioport.h>
  34. #include <linux/ip.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>
  51. #include "spider_net.h"
  52. MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
  53. "<Jens.Osterkamp@de.ibm.com>");
  54. MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
  55. MODULE_LICENSE("GPL");
  56. MODULE_VERSION(VERSION);
  57. static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
  58. static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
  59. module_param(rx_descriptors, int, 0444);
  60. module_param(tx_descriptors, int, 0444);
  61. MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
  62. "in rx chains");
  63. MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
  64. "in tx chain");
  65. char spider_net_driver_name[] = "spidernet";
  66. static struct pci_device_id spider_net_pci_tbl[] = {
  67. { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
  68. PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
  69. { 0, }
  70. };
  71. MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
  72. /**
  73. * spider_net_read_reg - reads an SMMIO register of a card
  74. * @card: device structure
  75. * @reg: register to read from
  76. *
  77. * returns the content of the specified SMMIO register.
  78. */
  79. static inline u32
  80. spider_net_read_reg(struct spider_net_card *card, u32 reg)
  81. {
  82. /* We use the powerpc specific variants instead of readl_be() because
  83. * we know spidernet is not a real PCI device and we can thus avoid the
  84. * performance hit caused by the PCI workarounds.
  85. */
  86. return in_be32(card->regs + reg);
  87. }
  88. /**
  89. * spider_net_write_reg - writes to an SMMIO register of a card
  90. * @card: device structure
  91. * @reg: register to write to
  92. * @value: value to write into the specified SMMIO register
  93. */
  94. static inline void
  95. spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
  96. {
  97. /* We use the powerpc specific variants instead of writel_be() because
  98. * we know spidernet is not a real PCI device and we can thus avoid the
  99. * performance hit caused by the PCI workarounds.
  100. */
  101. out_be32(card->regs + reg, value);
  102. }
  103. /** spider_net_write_phy - write to phy register
  104. * @netdev: adapter to be written to
  105. * @mii_id: id of MII
  106. * @reg: PHY register
  107. * @val: value to be written to phy register
  108. *
  109. * spider_net_write_phy_register writes to an arbitrary PHY
  110. * register via the spider GPCWOPCMD register. We assume the queue does
  111. * not run full (not more than 15 commands outstanding).
  112. **/
  113. static void
  114. spider_net_write_phy(struct net_device *netdev, int mii_id,
  115. int reg, int val)
  116. {
  117. struct spider_net_card *card = netdev_priv(netdev);
  118. u32 writevalue;
  119. writevalue = ((u32)mii_id << 21) |
  120. ((u32)reg << 16) | ((u32)val);
  121. spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
  122. }
  123. /** spider_net_read_phy - read from phy register
  124. * @netdev: network device to be read from
  125. * @mii_id: id of MII
  126. * @reg: PHY register
  127. *
  128. * Returns value read from PHY register
  129. *
  130. * spider_net_write_phy reads from an arbitrary PHY
  131. * register via the spider GPCROPCMD register
  132. **/
  133. static int
  134. spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
  135. {
  136. struct spider_net_card *card = netdev_priv(netdev);
  137. u32 readvalue;
  138. readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
  139. spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
  140. /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
  141. * interrupt, as we poll for the completion of the read operation
  142. * in spider_net_read_phy. Should take about 50 us */
  143. do {
  144. readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
  145. } while (readvalue & SPIDER_NET_GPREXEC);
  146. readvalue &= SPIDER_NET_GPRDAT_MASK;
  147. return readvalue;
  148. }
  149. /**
  150. * spider_net_setup_aneg - initial auto-negotiation setup
  151. * @card: device structure
  152. **/
  153. static void
  154. spider_net_setup_aneg(struct spider_net_card *card)
  155. {
  156. struct mii_phy *phy = &card->phy;
  157. u32 advertise = 0;
  158. u16 bmcr, bmsr, stat1000, estat;
  159. bmcr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMCR);
  160. bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
  161. stat1000 = spider_net_read_phy(card->netdev, phy->mii_id, MII_STAT1000);
  162. estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
  163. if (bmsr & BMSR_10HALF)
  164. advertise |= ADVERTISED_10baseT_Half;
  165. if (bmsr & BMSR_10FULL)
  166. advertise |= ADVERTISED_10baseT_Full;
  167. if (bmsr & BMSR_100HALF)
  168. advertise |= ADVERTISED_100baseT_Half;
  169. if (bmsr & BMSR_100FULL)
  170. advertise |= ADVERTISED_100baseT_Full;
  171. if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
  172. advertise |= SUPPORTED_1000baseT_Full;
  173. if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
  174. advertise |= SUPPORTED_1000baseT_Half;
  175. mii_phy_probe(phy, phy->mii_id);
  176. phy->def->ops->setup_aneg(phy, advertise);
  177. }
  178. /**
  179. * spider_net_rx_irq_off - switch off rx irq on this spider card
  180. * @card: device structure
  181. *
  182. * switches off rx irq by masking them out in the GHIINTnMSK register
  183. */
  184. static void
  185. spider_net_rx_irq_off(struct spider_net_card *card)
  186. {
  187. u32 regvalue;
  188. regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
  189. spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
  190. }
  191. /**
  192. * spider_net_rx_irq_on - switch on rx irq on this spider card
  193. * @card: device structure
  194. *
  195. * switches on rx irq by enabling them in the GHIINTnMSK register
  196. */
  197. static void
  198. spider_net_rx_irq_on(struct spider_net_card *card)
  199. {
  200. u32 regvalue;
  201. regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
  202. spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
  203. }
  204. /**
  205. * spider_net_set_promisc - sets the unicast address or the promiscuous mode
  206. * @card: card structure
  207. *
  208. * spider_net_set_promisc sets the unicast destination address filter and
  209. * thus either allows for non-promisc mode or promisc mode
  210. */
  211. static void
  212. spider_net_set_promisc(struct spider_net_card *card)
  213. {
  214. u32 macu, macl;
  215. struct net_device *netdev = card->netdev;
  216. if (netdev->flags & IFF_PROMISC) {
  217. /* clear destination entry 0 */
  218. spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
  219. spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
  220. spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
  221. SPIDER_NET_PROMISC_VALUE);
  222. } else {
  223. macu = netdev->dev_addr[0];
  224. macu <<= 8;
  225. macu |= netdev->dev_addr[1];
  226. memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
  227. macu |= SPIDER_NET_UA_DESCR_VALUE;
  228. spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
  229. spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
  230. spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
  231. SPIDER_NET_NONPROMISC_VALUE);
  232. }
  233. }
  234. /**
  235. * spider_net_get_mac_address - read mac address from spider card
  236. * @card: device structure
  237. *
  238. * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
  239. */
  240. static int
  241. spider_net_get_mac_address(struct net_device *netdev)
  242. {
  243. struct spider_net_card *card = netdev_priv(netdev);
  244. u32 macl, macu;
  245. macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
  246. macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
  247. netdev->dev_addr[0] = (macu >> 24) & 0xff;
  248. netdev->dev_addr[1] = (macu >> 16) & 0xff;
  249. netdev->dev_addr[2] = (macu >> 8) & 0xff;
  250. netdev->dev_addr[3] = macu & 0xff;
  251. netdev->dev_addr[4] = (macl >> 8) & 0xff;
  252. netdev->dev_addr[5] = macl & 0xff;
  253. if (!is_valid_ether_addr(&netdev->dev_addr[0]))
  254. return -EINVAL;
  255. return 0;
  256. }
  257. /**
  258. * spider_net_get_descr_status -- returns the status of a descriptor
  259. * @descr: descriptor to look at
  260. *
  261. * returns the status as in the dmac_cmd_status field of the descriptor
  262. */
  263. static inline int
  264. spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
  265. {
  266. return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
  267. }
  268. /**
  269. * spider_net_free_chain - free descriptor chain
  270. * @card: card structure
  271. * @chain: address of chain
  272. *
  273. */
  274. static void
  275. spider_net_free_chain(struct spider_net_card *card,
  276. struct spider_net_descr_chain *chain)
  277. {
  278. struct spider_net_descr *descr;
  279. descr = chain->ring;
  280. do {
  281. descr->bus_addr = 0;
  282. descr->hwdescr->next_descr_addr = 0;
  283. descr = descr->next;
  284. } while (descr != chain->ring);
  285. dma_free_coherent(&card->pdev->dev, chain->num_desc,
  286. chain->hwring, chain->dma_addr);
  287. }
  288. /**
  289. * spider_net_init_chain - alloc and link descriptor chain
  290. * @card: card structure
  291. * @chain: address of chain
  292. *
  293. * We manage a circular list that mirrors the hardware structure,
  294. * except that the hardware uses bus addresses.
  295. *
  296. * Returns 0 on success, <0 on failure
  297. */
  298. static int
  299. spider_net_init_chain(struct spider_net_card *card,
  300. struct spider_net_descr_chain *chain)
  301. {
  302. int i;
  303. struct spider_net_descr *descr;
  304. struct spider_net_hw_descr *hwdescr;
  305. dma_addr_t buf;
  306. size_t alloc_size;
  307. alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
  308. chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
  309. &chain->dma_addr, GFP_KERNEL);
  310. if (!chain->hwring)
  311. return -ENOMEM;
  312. memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr));
  313. /* Set up the hardware pointers in each descriptor */
  314. descr = chain->ring;
  315. hwdescr = chain->hwring;
  316. buf = chain->dma_addr;
  317. for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
  318. hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
  319. hwdescr->next_descr_addr = 0;
  320. descr->hwdescr = hwdescr;
  321. descr->bus_addr = buf;
  322. descr->next = descr + 1;
  323. descr->prev = descr - 1;
  324. buf += sizeof(struct spider_net_hw_descr);
  325. }
  326. /* do actual circular list */
  327. (descr-1)->next = chain->ring;
  328. chain->ring->prev = descr-1;
  329. spin_lock_init(&chain->lock);
  330. chain->head = chain->ring;
  331. chain->tail = chain->ring;
  332. return 0;
  333. }
  334. /**
  335. * spider_net_free_rx_chain_contents - frees descr contents in rx chain
  336. * @card: card structure
  337. *
  338. * returns 0 on success, <0 on failure
  339. */
  340. static void
  341. spider_net_free_rx_chain_contents(struct spider_net_card *card)
  342. {
  343. struct spider_net_descr *descr;
  344. descr = card->rx_chain.head;
  345. do {
  346. if (descr->skb) {
  347. pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
  348. SPIDER_NET_MAX_FRAME,
  349. PCI_DMA_BIDIRECTIONAL);
  350. dev_kfree_skb(descr->skb);
  351. descr->skb = NULL;
  352. }
  353. descr = descr->next;
  354. } while (descr != card->rx_chain.head);
  355. }
  356. /**
  357. * spider_net_prepare_rx_descr - Reinitialize RX descriptor
  358. * @card: card structure
  359. * @descr: descriptor to re-init
  360. *
  361. * Return 0 on succes, <0 on failure.
  362. *
  363. * Allocates a new rx skb, iommu-maps it and attaches it to the
  364. * descriptor. Mark the descriptor as activated, ready-to-use.
  365. */
  366. static int
  367. spider_net_prepare_rx_descr(struct spider_net_card *card,
  368. struct spider_net_descr *descr)
  369. {
  370. struct spider_net_hw_descr *hwdescr = descr->hwdescr;
  371. dma_addr_t buf;
  372. int offset;
  373. int bufsize;
  374. /* we need to round up the buffer size to a multiple of 128 */
  375. bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
  376. (~(SPIDER_NET_RXBUF_ALIGN - 1));
  377. /* and we need to have it 128 byte aligned, therefore we allocate a
  378. * bit more */
  379. /* allocate an skb */
  380. descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
  381. if (!descr->skb) {
  382. if (netif_msg_rx_err(card) && net_ratelimit())
  383. pr_err("Not enough memory to allocate rx buffer\n");
  384. card->spider_stats.alloc_rx_skb_error++;
  385. return -ENOMEM;
  386. }
  387. hwdescr->buf_size = bufsize;
  388. hwdescr->result_size = 0;
  389. hwdescr->valid_size = 0;
  390. hwdescr->data_status = 0;
  391. hwdescr->data_error = 0;
  392. offset = ((unsigned long)descr->skb->data) &
  393. (SPIDER_NET_RXBUF_ALIGN - 1);
  394. if (offset)
  395. skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
  396. /* iommu-map the skb */
  397. buf = pci_map_single(card->pdev, descr->skb->data,
  398. SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
  399. if (pci_dma_mapping_error(buf)) {
  400. dev_kfree_skb_any(descr->skb);
  401. descr->skb = NULL;
  402. if (netif_msg_rx_err(card) && net_ratelimit())
  403. pr_err("Could not iommu-map rx buffer\n");
  404. card->spider_stats.rx_iommu_map_error++;
  405. hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
  406. } else {
  407. hwdescr->buf_addr = buf;
  408. hwdescr->next_descr_addr = 0;
  409. wmb();
  410. hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
  411. SPIDER_NET_DMAC_NOINTR_COMPLETE;
  412. wmb();
  413. descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
  414. }
  415. return 0;
  416. }
  417. /**
  418. * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
  419. * @card: card structure
  420. *
  421. * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
  422. * chip by writing to the appropriate register. DMA is enabled in
  423. * spider_net_enable_rxdmac.
  424. */
  425. static inline void
  426. spider_net_enable_rxchtails(struct spider_net_card *card)
  427. {
  428. /* assume chain is aligned correctly */
  429. spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
  430. card->rx_chain.tail->bus_addr);
  431. }
  432. /**
  433. * spider_net_enable_rxdmac - enables a receive DMA controller
  434. * @card: card structure
  435. *
  436. * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
  437. * in the GDADMACCNTR register
  438. */
  439. static inline void
  440. spider_net_enable_rxdmac(struct spider_net_card *card)
  441. {
  442. wmb();
  443. spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
  444. SPIDER_NET_DMA_RX_VALUE);
  445. }
  446. /**
  447. * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
  448. * @card: card structure
  449. *
  450. * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
  451. */
  452. static void
  453. spider_net_refill_rx_chain(struct spider_net_card *card)
  454. {
  455. struct spider_net_descr_chain *chain = &card->rx_chain;
  456. unsigned long flags;
  457. /* one context doing the refill (and a second context seeing that
  458. * and omitting it) is ok. If called by NAPI, we'll be called again
  459. * as spider_net_decode_one_descr is called several times. If some
  460. * interrupt calls us, the NAPI is about to clean up anyway. */
  461. if (!spin_trylock_irqsave(&chain->lock, flags))
  462. return;
  463. while (spider_net_get_descr_status(chain->head->hwdescr) ==
  464. SPIDER_NET_DESCR_NOT_IN_USE) {
  465. if (spider_net_prepare_rx_descr(card, chain->head))
  466. break;
  467. chain->head = chain->head->next;
  468. }
  469. spin_unlock_irqrestore(&chain->lock, flags);
  470. }
  471. /**
  472. * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
  473. * @card: card structure
  474. *
  475. * Returns 0 on success, <0 on failure.
  476. */
  477. static int
  478. spider_net_alloc_rx_skbs(struct spider_net_card *card)
  479. {
  480. int result;
  481. struct spider_net_descr_chain *chain;
  482. result = -ENOMEM;
  483. chain = &card->rx_chain;
  484. /* Put at least one buffer into the chain. if this fails,
  485. * we've got a problem. If not, spider_net_refill_rx_chain
  486. * will do the rest at the end of this function. */
  487. if (spider_net_prepare_rx_descr(card, chain->head))
  488. goto error;
  489. else
  490. chain->head = chain->head->next;
  491. /* This will allocate the rest of the rx buffers;
  492. * if not, it's business as usual later on. */
  493. spider_net_refill_rx_chain(card);
  494. spider_net_enable_rxdmac(card);
  495. return 0;
  496. error:
  497. spider_net_free_rx_chain_contents(card);
  498. return result;
  499. }
  500. /**
  501. * spider_net_get_multicast_hash - generates hash for multicast filter table
  502. * @addr: multicast address
  503. *
  504. * returns the hash value.
  505. *
  506. * spider_net_get_multicast_hash calculates a hash value for a given multicast
  507. * address, that is used to set the multicast filter tables
  508. */
  509. static u8
  510. spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
  511. {
  512. u32 crc;
  513. u8 hash;
  514. char addr_for_crc[ETH_ALEN] = { 0, };
  515. int i, bit;
  516. for (i = 0; i < ETH_ALEN * 8; i++) {
  517. bit = (addr[i / 8] >> (i % 8)) & 1;
  518. addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
  519. }
  520. crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
  521. hash = (crc >> 27);
  522. hash <<= 3;
  523. hash |= crc & 7;
  524. hash &= 0xff;
  525. return hash;
  526. }
  527. /**
  528. * spider_net_set_multi - sets multicast addresses and promisc flags
  529. * @netdev: interface device structure
  530. *
  531. * spider_net_set_multi configures multicast addresses as needed for the
  532. * netdev interface. It also sets up multicast, allmulti and promisc
  533. * flags appropriately
  534. */
  535. static void
  536. spider_net_set_multi(struct net_device *netdev)
  537. {
  538. struct dev_mc_list *mc;
  539. u8 hash;
  540. int i;
  541. u32 reg;
  542. struct spider_net_card *card = netdev_priv(netdev);
  543. unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
  544. {0, };
  545. spider_net_set_promisc(card);
  546. if (netdev->flags & IFF_ALLMULTI) {
  547. for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
  548. set_bit(i, bitmask);
  549. }
  550. goto write_hash;
  551. }
  552. /* well, we know, what the broadcast hash value is: it's xfd
  553. hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
  554. set_bit(0xfd, bitmask);
  555. for (mc = netdev->mc_list; mc; mc = mc->next) {
  556. hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
  557. set_bit(hash, bitmask);
  558. }
  559. write_hash:
  560. for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
  561. reg = 0;
  562. if (test_bit(i * 4, bitmask))
  563. reg += 0x08;
  564. reg <<= 8;
  565. if (test_bit(i * 4 + 1, bitmask))
  566. reg += 0x08;
  567. reg <<= 8;
  568. if (test_bit(i * 4 + 2, bitmask))
  569. reg += 0x08;
  570. reg <<= 8;
  571. if (test_bit(i * 4 + 3, bitmask))
  572. reg += 0x08;
  573. spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
  574. }
  575. }
  576. /**
  577. * spider_net_disable_rxdmac - disables the receive DMA controller
  578. * @card: card structure
  579. *
  580. * spider_net_disable_rxdmac terminates processing on the DMA controller by
  581. * turing off DMA and issueing a force end
  582. */
  583. static void
  584. spider_net_disable_rxdmac(struct spider_net_card *card)
  585. {
  586. spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
  587. SPIDER_NET_DMA_RX_FEND_VALUE);
  588. }
  589. /**
  590. * spider_net_prepare_tx_descr - fill tx descriptor with skb data
  591. * @card: card structure
  592. * @descr: descriptor structure to fill out
  593. * @skb: packet to use
  594. *
  595. * returns 0 on success, <0 on failure.
  596. *
  597. * fills out the descriptor structure with skb data and len. Copies data,
  598. * if needed (32bit DMA!)
  599. */
  600. static int
  601. spider_net_prepare_tx_descr(struct spider_net_card *card,
  602. struct sk_buff *skb)
  603. {
  604. struct spider_net_descr_chain *chain = &card->tx_chain;
  605. struct spider_net_descr *descr;
  606. struct spider_net_hw_descr *hwdescr;
  607. dma_addr_t buf;
  608. unsigned long flags;
  609. buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
  610. if (pci_dma_mapping_error(buf)) {
  611. if (netif_msg_tx_err(card) && net_ratelimit())
  612. pr_err("could not iommu-map packet (%p, %i). "
  613. "Dropping packet\n", skb->data, skb->len);
  614. card->spider_stats.tx_iommu_map_error++;
  615. return -ENOMEM;
  616. }
  617. spin_lock_irqsave(&chain->lock, flags);
  618. descr = card->tx_chain.head;
  619. if (descr->next == chain->tail->prev) {
  620. spin_unlock_irqrestore(&chain->lock, flags);
  621. pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
  622. return -ENOMEM;
  623. }
  624. hwdescr = descr->hwdescr;
  625. chain->head = descr->next;
  626. descr->skb = skb;
  627. hwdescr->buf_addr = buf;
  628. hwdescr->buf_size = skb->len;
  629. hwdescr->next_descr_addr = 0;
  630. hwdescr->data_status = 0;
  631. hwdescr->dmac_cmd_status =
  632. SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
  633. spin_unlock_irqrestore(&chain->lock, flags);
  634. if (skb->protocol == htons(ETH_P_IP) && skb->ip_summed == CHECKSUM_PARTIAL)
  635. switch (skb->nh.iph->protocol) {
  636. case IPPROTO_TCP:
  637. hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
  638. break;
  639. case IPPROTO_UDP:
  640. hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
  641. break;
  642. }
  643. /* Chain the bus address, so that the DMA engine finds this descr. */
  644. wmb();
  645. descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
  646. card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
  647. return 0;
  648. }
  649. static int
  650. spider_net_set_low_watermark(struct spider_net_card *card)
  651. {
  652. struct spider_net_descr *descr = card->tx_chain.tail;
  653. struct spider_net_hw_descr *hwdescr;
  654. unsigned long flags;
  655. int status;
  656. int cnt=0;
  657. int i;
  658. /* Measure the length of the queue. Measurement does not
  659. * need to be precise -- does not need a lock. */
  660. while (descr != card->tx_chain.head) {
  661. status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
  662. if (status == SPIDER_NET_DESCR_NOT_IN_USE)
  663. break;
  664. descr = descr->next;
  665. cnt++;
  666. }
  667. /* If TX queue is short, don't even bother with interrupts */
  668. if (cnt < card->tx_chain.num_desc/4)
  669. return cnt;
  670. /* Set low-watermark 3/4th's of the way into the queue. */
  671. descr = card->tx_chain.tail;
  672. cnt = (cnt*3)/4;
  673. for (i=0;i<cnt; i++)
  674. descr = descr->next;
  675. /* Set the new watermark, clear the old watermark */
  676. spin_lock_irqsave(&card->tx_chain.lock, flags);
  677. descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
  678. if (card->low_watermark && card->low_watermark != descr) {
  679. hwdescr = card->low_watermark->hwdescr;
  680. hwdescr->dmac_cmd_status =
  681. hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
  682. }
  683. card->low_watermark = descr;
  684. spin_unlock_irqrestore(&card->tx_chain.lock, flags);
  685. return cnt;
  686. }
  687. /**
  688. * spider_net_release_tx_chain - processes sent tx descriptors
  689. * @card: adapter structure
  690. * @brutal: if set, don't care about whether descriptor seems to be in use
  691. *
  692. * returns 0 if the tx ring is empty, otherwise 1.
  693. *
  694. * spider_net_release_tx_chain releases the tx descriptors that spider has
  695. * finished with (if non-brutal) or simply release tx descriptors (if brutal).
  696. * If some other context is calling this function, we return 1 so that we're
  697. * scheduled again (if we were scheduled) and will not loose initiative.
  698. */
  699. static int
  700. spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
  701. {
  702. struct spider_net_descr_chain *chain = &card->tx_chain;
  703. struct spider_net_descr *descr;
  704. struct spider_net_hw_descr *hwdescr;
  705. struct sk_buff *skb;
  706. u32 buf_addr;
  707. unsigned long flags;
  708. int status;
  709. while (1) {
  710. spin_lock_irqsave(&chain->lock, flags);
  711. if (chain->tail == chain->head) {
  712. spin_unlock_irqrestore(&chain->lock, flags);
  713. return 0;
  714. }
  715. descr = chain->tail;
  716. hwdescr = descr->hwdescr;
  717. status = spider_net_get_descr_status(hwdescr);
  718. switch (status) {
  719. case SPIDER_NET_DESCR_COMPLETE:
  720. card->netdev_stats.tx_packets++;
  721. card->netdev_stats.tx_bytes += descr->skb->len;
  722. break;
  723. case SPIDER_NET_DESCR_CARDOWNED:
  724. if (!brutal) {
  725. spin_unlock_irqrestore(&chain->lock, flags);
  726. return 1;
  727. }
  728. /* fallthrough, if we release the descriptors
  729. * brutally (then we don't care about
  730. * SPIDER_NET_DESCR_CARDOWNED) */
  731. case SPIDER_NET_DESCR_RESPONSE_ERROR:
  732. case SPIDER_NET_DESCR_PROTECTION_ERROR:
  733. case SPIDER_NET_DESCR_FORCE_END:
  734. if (netif_msg_tx_err(card))
  735. pr_err("%s: forcing end of tx descriptor "
  736. "with status x%02x\n",
  737. card->netdev->name, status);
  738. card->netdev_stats.tx_errors++;
  739. break;
  740. default:
  741. card->netdev_stats.tx_dropped++;
  742. if (!brutal) {
  743. spin_unlock_irqrestore(&chain->lock, flags);
  744. return 1;
  745. }
  746. }
  747. chain->tail = descr->next;
  748. hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
  749. skb = descr->skb;
  750. descr->skb = NULL;
  751. buf_addr = hwdescr->buf_addr;
  752. spin_unlock_irqrestore(&chain->lock, flags);
  753. /* unmap the skb */
  754. if (skb) {
  755. pci_unmap_single(card->pdev, buf_addr, skb->len,
  756. PCI_DMA_TODEVICE);
  757. dev_kfree_skb(skb);
  758. }
  759. }
  760. return 0;
  761. }
  762. /**
  763. * spider_net_kick_tx_dma - enables TX DMA processing
  764. * @card: card structure
  765. * @descr: descriptor address to enable TX processing at
  766. *
  767. * This routine will start the transmit DMA running if
  768. * it is not already running. This routine ned only be
  769. * called when queueing a new packet to an empty tx queue.
  770. * Writes the current tx chain head as start address
  771. * of the tx descriptor chain and enables the transmission
  772. * DMA engine.
  773. */
  774. static inline void
  775. spider_net_kick_tx_dma(struct spider_net_card *card)
  776. {
  777. struct spider_net_descr *descr;
  778. if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
  779. SPIDER_NET_TX_DMA_EN)
  780. goto out;
  781. descr = card->tx_chain.tail;
  782. for (;;) {
  783. if (spider_net_get_descr_status(descr->hwdescr) ==
  784. SPIDER_NET_DESCR_CARDOWNED) {
  785. spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
  786. descr->bus_addr);
  787. spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
  788. SPIDER_NET_DMA_TX_VALUE);
  789. break;
  790. }
  791. if (descr == card->tx_chain.head)
  792. break;
  793. descr = descr->next;
  794. }
  795. out:
  796. mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
  797. }
  798. /**
  799. * spider_net_xmit - transmits a frame over the device
  800. * @skb: packet to send out
  801. * @netdev: interface device structure
  802. *
  803. * returns 0 on success, !0 on failure
  804. */
  805. static int
  806. spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
  807. {
  808. int cnt;
  809. struct spider_net_card *card = netdev_priv(netdev);
  810. spider_net_release_tx_chain(card, 0);
  811. if (spider_net_prepare_tx_descr(card, skb) != 0) {
  812. card->netdev_stats.tx_dropped++;
  813. netif_stop_queue(netdev);
  814. return NETDEV_TX_BUSY;
  815. }
  816. cnt = spider_net_set_low_watermark(card);
  817. if (cnt < 5)
  818. spider_net_kick_tx_dma(card);
  819. return NETDEV_TX_OK;
  820. }
  821. /**
  822. * spider_net_cleanup_tx_ring - cleans up the TX ring
  823. * @card: card structure
  824. *
  825. * spider_net_cleanup_tx_ring is called by either the tx_timer
  826. * or from the NAPI polling routine.
  827. * This routine releases resources associted with transmitted
  828. * packets, including updating the queue tail pointer.
  829. */
  830. static void
  831. spider_net_cleanup_tx_ring(struct spider_net_card *card)
  832. {
  833. if ((spider_net_release_tx_chain(card, 0) != 0) &&
  834. (card->netdev->flags & IFF_UP)) {
  835. spider_net_kick_tx_dma(card);
  836. netif_wake_queue(card->netdev);
  837. }
  838. }
  839. /**
  840. * spider_net_do_ioctl - called for device ioctls
  841. * @netdev: interface device structure
  842. * @ifr: request parameter structure for ioctl
  843. * @cmd: command code for ioctl
  844. *
  845. * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
  846. * -EOPNOTSUPP is returned, if an unknown ioctl was requested
  847. */
  848. static int
  849. spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
  850. {
  851. switch (cmd) {
  852. default:
  853. return -EOPNOTSUPP;
  854. }
  855. }
  856. /**
  857. * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
  858. * @descr: descriptor to process
  859. * @card: card structure
  860. *
  861. * Fills out skb structure and passes the data to the stack.
  862. * The descriptor state is not changed.
  863. */
  864. static void
  865. spider_net_pass_skb_up(struct spider_net_descr *descr,
  866. struct spider_net_card *card)
  867. {
  868. struct spider_net_hw_descr *hwdescr= descr->hwdescr;
  869. struct sk_buff *skb;
  870. struct net_device *netdev;
  871. u32 data_status, data_error;
  872. data_status = hwdescr->data_status;
  873. data_error = hwdescr->data_error;
  874. netdev = card->netdev;
  875. skb = descr->skb;
  876. skb->dev = netdev;
  877. skb_put(skb, hwdescr->valid_size);
  878. /* the card seems to add 2 bytes of junk in front
  879. * of the ethernet frame */
  880. #define SPIDER_MISALIGN 2
  881. skb_pull(skb, SPIDER_MISALIGN);
  882. skb->protocol = eth_type_trans(skb, netdev);
  883. /* checksum offload */
  884. if (card->options.rx_csum) {
  885. if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
  886. SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
  887. !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
  888. skb->ip_summed = CHECKSUM_UNNECESSARY;
  889. else
  890. skb->ip_summed = CHECKSUM_NONE;
  891. } else
  892. skb->ip_summed = CHECKSUM_NONE;
  893. if (data_status & SPIDER_NET_VLAN_PACKET) {
  894. /* further enhancements: HW-accel VLAN
  895. * vlan_hwaccel_receive_skb
  896. */
  897. }
  898. /* pass skb up to stack */
  899. netif_receive_skb(skb);
  900. /* update netdevice statistics */
  901. card->netdev_stats.rx_packets++;
  902. card->netdev_stats.rx_bytes += skb->len;
  903. }
  904. #ifdef DEBUG
  905. static void show_rx_chain(struct spider_net_card *card)
  906. {
  907. struct spider_net_descr_chain *chain = &card->rx_chain;
  908. struct spider_net_descr *start= chain->tail;
  909. struct spider_net_descr *descr= start;
  910. int status;
  911. int cnt = 0;
  912. int cstat = spider_net_get_descr_status(descr);
  913. printk(KERN_INFO "RX chain tail at descr=%ld\n",
  914. (start - card->descr) - card->tx_chain.num_desc);
  915. status = cstat;
  916. do
  917. {
  918. status = spider_net_get_descr_status(descr);
  919. if (cstat != status) {
  920. printk(KERN_INFO "Have %d descrs with stat=x%08x\n", cnt, cstat);
  921. cstat = status;
  922. cnt = 0;
  923. }
  924. cnt ++;
  925. descr = descr->next;
  926. } while (descr != start);
  927. printk(KERN_INFO "Last %d descrs with stat=x%08x\n", cnt, cstat);
  928. }
  929. #endif
  930. /**
  931. * spider_net_decode_one_descr - processes an RX descriptor
  932. * @card: card structure
  933. *
  934. * Returns 1 if a packet has been sent to the stack, otherwise 0.
  935. *
  936. * Processes an RX descriptor by iommu-unmapping the data buffer
  937. * and passing the packet up to the stack. This function is called
  938. * in softirq context, e.g. either bottom half from interrupt or
  939. * NAPI polling context.
  940. */
  941. static int
  942. spider_net_decode_one_descr(struct spider_net_card *card)
  943. {
  944. struct spider_net_descr_chain *chain = &card->rx_chain;
  945. struct spider_net_descr *descr = chain->tail;
  946. struct spider_net_hw_descr *hwdescr = descr->hwdescr;
  947. int status;
  948. status = spider_net_get_descr_status(hwdescr);
  949. /* Nothing in the descriptor, or ring must be empty */
  950. if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
  951. (status == SPIDER_NET_DESCR_NOT_IN_USE))
  952. return 0;
  953. /* descriptor definitively used -- move on tail */
  954. chain->tail = descr->next;
  955. /* unmap descriptor */
  956. pci_unmap_single(card->pdev, hwdescr->buf_addr,
  957. SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
  958. if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
  959. (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
  960. (status == SPIDER_NET_DESCR_FORCE_END) ) {
  961. if (netif_msg_rx_err(card))
  962. pr_err("%s: dropping RX descriptor with state %d\n",
  963. card->netdev->name, status);
  964. card->netdev_stats.rx_dropped++;
  965. goto bad_desc;
  966. }
  967. if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
  968. (status != SPIDER_NET_DESCR_FRAME_END) ) {
  969. if (netif_msg_rx_err(card))
  970. pr_err("%s: RX descriptor with unknown state %d\n",
  971. card->netdev->name, status);
  972. card->spider_stats.rx_desc_unk_state++;
  973. goto bad_desc;
  974. }
  975. /* The cases we'll throw away the packet immediately */
  976. if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
  977. if (netif_msg_rx_err(card))
  978. pr_err("%s: error in received descriptor found, "
  979. "data_status=x%08x, data_error=x%08x\n",
  980. card->netdev->name,
  981. hwdescr->data_status, hwdescr->data_error);
  982. goto bad_desc;
  983. }
  984. if (hwdescr->dmac_cmd_status & 0xfefe) {
  985. pr_err("%s: bad status, cmd_status=x%08x\n",
  986. card->netdev->name,
  987. hwdescr->dmac_cmd_status);
  988. pr_err("buf_addr=x%08x\n", hwdescr->buf_addr);
  989. pr_err("buf_size=x%08x\n", hwdescr->buf_size);
  990. pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
  991. pr_err("result_size=x%08x\n", hwdescr->result_size);
  992. pr_err("valid_size=x%08x\n", hwdescr->valid_size);
  993. pr_err("data_status=x%08x\n", hwdescr->data_status);
  994. pr_err("data_error=x%08x\n", hwdescr->data_error);
  995. pr_err("which=%ld\n", descr - card->rx_chain.ring);
  996. card->spider_stats.rx_desc_error++;
  997. goto bad_desc;
  998. }
  999. /* Ok, we've got a packet in descr */
  1000. spider_net_pass_skb_up(descr, card);
  1001. hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
  1002. return 1;
  1003. bad_desc:
  1004. dev_kfree_skb_irq(descr->skb);
  1005. descr->skb = NULL;
  1006. hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
  1007. return 0;
  1008. }
  1009. /**
  1010. * spider_net_poll - NAPI poll function called by the stack to return packets
  1011. * @netdev: interface device structure
  1012. * @budget: number of packets we can pass to the stack at most
  1013. *
  1014. * returns 0 if no more packets available to the driver/stack. Returns 1,
  1015. * if the quota is exceeded, but the driver has still packets.
  1016. *
  1017. * spider_net_poll returns all packets from the rx descriptors to the stack
  1018. * (using netif_receive_skb). If all/enough packets are up, the driver
  1019. * reenables interrupts and returns 0. If not, 1 is returned.
  1020. */
  1021. static int
  1022. spider_net_poll(struct net_device *netdev, int *budget)
  1023. {
  1024. struct spider_net_card *card = netdev_priv(netdev);
  1025. int packets_to_do, packets_done = 0;
  1026. int no_more_packets = 0;
  1027. spider_net_cleanup_tx_ring(card);
  1028. packets_to_do = min(*budget, netdev->quota);
  1029. while (packets_to_do) {
  1030. if (spider_net_decode_one_descr(card)) {
  1031. packets_done++;
  1032. packets_to_do--;
  1033. } else {
  1034. /* no more packets for the stack */
  1035. no_more_packets = 1;
  1036. break;
  1037. }
  1038. }
  1039. netdev->quota -= packets_done;
  1040. *budget -= packets_done;
  1041. spider_net_refill_rx_chain(card);
  1042. spider_net_enable_rxdmac(card);
  1043. /* if all packets are in the stack, enable interrupts and return 0 */
  1044. /* if not, return 1 */
  1045. if (no_more_packets) {
  1046. netif_rx_complete(netdev);
  1047. spider_net_rx_irq_on(card);
  1048. return 0;
  1049. }
  1050. return 1;
  1051. }
  1052. /**
  1053. * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
  1054. * @netdev: interface device structure
  1055. * @grp: vlan_group structure that is registered (NULL on destroying interface)
  1056. */
  1057. static void
  1058. spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
  1059. {
  1060. /* further enhancement... yet to do */
  1061. return;
  1062. }
  1063. /**
  1064. * spider_net_vlan_rx_add - adds VLAN id to the card filter
  1065. * @netdev: interface device structure
  1066. * @vid: VLAN id to add
  1067. */
  1068. static void
  1069. spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
  1070. {
  1071. /* further enhancement... yet to do */
  1072. /* add vid to card's VLAN filter table */
  1073. return;
  1074. }
  1075. /**
  1076. * spider_net_vlan_rx_kill - removes VLAN id to the card filter
  1077. * @netdev: interface device structure
  1078. * @vid: VLAN id to remove
  1079. */
  1080. static void
  1081. spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
  1082. {
  1083. /* further enhancement... yet to do */
  1084. /* remove vid from card's VLAN filter table */
  1085. }
  1086. /**
  1087. * spider_net_get_stats - get interface statistics
  1088. * @netdev: interface device structure
  1089. *
  1090. * returns the interface statistics residing in the spider_net_card struct
  1091. */
  1092. static struct net_device_stats *
  1093. spider_net_get_stats(struct net_device *netdev)
  1094. {
  1095. struct spider_net_card *card = netdev_priv(netdev);
  1096. struct net_device_stats *stats = &card->netdev_stats;
  1097. return stats;
  1098. }
  1099. /**
  1100. * spider_net_change_mtu - changes the MTU of an interface
  1101. * @netdev: interface device structure
  1102. * @new_mtu: new MTU value
  1103. *
  1104. * returns 0 on success, <0 on failure
  1105. */
  1106. static int
  1107. spider_net_change_mtu(struct net_device *netdev, int new_mtu)
  1108. {
  1109. /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
  1110. * and mtu is outbound only anyway */
  1111. if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
  1112. (new_mtu > SPIDER_NET_MAX_MTU) )
  1113. return -EINVAL;
  1114. netdev->mtu = new_mtu;
  1115. return 0;
  1116. }
  1117. /**
  1118. * spider_net_set_mac - sets the MAC of an interface
  1119. * @netdev: interface device structure
  1120. * @ptr: pointer to new MAC address
  1121. *
  1122. * Returns 0 on success, <0 on failure. Currently, we don't support this
  1123. * and will always return EOPNOTSUPP.
  1124. */
  1125. static int
  1126. spider_net_set_mac(struct net_device *netdev, void *p)
  1127. {
  1128. struct spider_net_card *card = netdev_priv(netdev);
  1129. u32 macl, macu, regvalue;
  1130. struct sockaddr *addr = p;
  1131. if (!is_valid_ether_addr(addr->sa_data))
  1132. return -EADDRNOTAVAIL;
  1133. /* switch off GMACTPE and GMACRPE */
  1134. regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
  1135. regvalue &= ~((1 << 5) | (1 << 6));
  1136. spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
  1137. /* write mac */
  1138. macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
  1139. (addr->sa_data[2]<<8) + (addr->sa_data[3]);
  1140. macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
  1141. spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
  1142. spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
  1143. /* switch GMACTPE and GMACRPE back on */
  1144. regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
  1145. regvalue |= ((1 << 5) | (1 << 6));
  1146. spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
  1147. spider_net_set_promisc(card);
  1148. /* look up, whether we have been successful */
  1149. if (spider_net_get_mac_address(netdev))
  1150. return -EADDRNOTAVAIL;
  1151. if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
  1152. return -EADDRNOTAVAIL;
  1153. return 0;
  1154. }
  1155. /**
  1156. * spider_net_link_reset
  1157. * @netdev: net device structure
  1158. *
  1159. * This is called when the PHY_LINK signal is asserted. For the blade this is
  1160. * not connected so we should never get here.
  1161. *
  1162. */
  1163. static void
  1164. spider_net_link_reset(struct net_device *netdev)
  1165. {
  1166. struct spider_net_card *card = netdev_priv(netdev);
  1167. del_timer_sync(&card->aneg_timer);
  1168. /* clear interrupt, block further interrupts */
  1169. spider_net_write_reg(card, SPIDER_NET_GMACST,
  1170. spider_net_read_reg(card, SPIDER_NET_GMACST));
  1171. spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
  1172. /* reset phy and setup aneg */
  1173. spider_net_setup_aneg(card);
  1174. mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
  1175. }
  1176. /**
  1177. * spider_net_handle_error_irq - handles errors raised by an interrupt
  1178. * @card: card structure
  1179. * @status_reg: interrupt status register 0 (GHIINT0STS)
  1180. *
  1181. * spider_net_handle_error_irq treats or ignores all error conditions
  1182. * found when an interrupt is presented
  1183. */
  1184. static void
  1185. spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
  1186. {
  1187. u32 error_reg1, error_reg2;
  1188. u32 i;
  1189. int show_error = 1;
  1190. error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
  1191. error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
  1192. /* check GHIINT0STS ************************************/
  1193. if (status_reg)
  1194. for (i = 0; i < 32; i++)
  1195. if (status_reg & (1<<i))
  1196. switch (i)
  1197. {
  1198. /* let error_reg1 and error_reg2 evaluation decide, what to do
  1199. case SPIDER_NET_PHYINT:
  1200. case SPIDER_NET_GMAC2INT:
  1201. case SPIDER_NET_GMAC1INT:
  1202. case SPIDER_NET_GFIFOINT:
  1203. case SPIDER_NET_DMACINT:
  1204. case SPIDER_NET_GSYSINT:
  1205. break; */
  1206. case SPIDER_NET_GIPSINT:
  1207. show_error = 0;
  1208. break;
  1209. case SPIDER_NET_GPWOPCMPINT:
  1210. /* PHY write operation completed */
  1211. show_error = 0;
  1212. break;
  1213. case SPIDER_NET_GPROPCMPINT:
  1214. /* PHY read operation completed */
  1215. /* we don't use semaphores, as we poll for the completion
  1216. * of the read operation in spider_net_read_phy. Should take
  1217. * about 50 us */
  1218. show_error = 0;
  1219. break;
  1220. case SPIDER_NET_GPWFFINT:
  1221. /* PHY command queue full */
  1222. if (netif_msg_intr(card))
  1223. pr_err("PHY write queue full\n");
  1224. show_error = 0;
  1225. break;
  1226. /* case SPIDER_NET_GRMDADRINT: not used. print a message */
  1227. /* case SPIDER_NET_GRMARPINT: not used. print a message */
  1228. /* case SPIDER_NET_GRMMPINT: not used. print a message */
  1229. case SPIDER_NET_GDTDEN0INT:
  1230. /* someone has set TX_DMA_EN to 0 */
  1231. show_error = 0;
  1232. break;
  1233. case SPIDER_NET_GDDDEN0INT: /* fallthrough */
  1234. case SPIDER_NET_GDCDEN0INT: /* fallthrough */
  1235. case SPIDER_NET_GDBDEN0INT: /* fallthrough */
  1236. case SPIDER_NET_GDADEN0INT:
  1237. /* someone has set RX_DMA_EN to 0 */
  1238. show_error = 0;
  1239. break;
  1240. /* RX interrupts */
  1241. case SPIDER_NET_GDDFDCINT:
  1242. case SPIDER_NET_GDCFDCINT:
  1243. case SPIDER_NET_GDBFDCINT:
  1244. case SPIDER_NET_GDAFDCINT:
  1245. /* case SPIDER_NET_GDNMINT: not used. print a message */
  1246. /* case SPIDER_NET_GCNMINT: not used. print a message */
  1247. /* case SPIDER_NET_GBNMINT: not used. print a message */
  1248. /* case SPIDER_NET_GANMINT: not used. print a message */
  1249. /* case SPIDER_NET_GRFNMINT: not used. print a message */
  1250. show_error = 0;
  1251. break;
  1252. /* TX interrupts */
  1253. case SPIDER_NET_GDTFDCINT:
  1254. show_error = 0;
  1255. break;
  1256. case SPIDER_NET_GTTEDINT:
  1257. show_error = 0;
  1258. break;
  1259. case SPIDER_NET_GDTDCEINT:
  1260. /* chain end. If a descriptor should be sent, kick off
  1261. * tx dma
  1262. if (card->tx_chain.tail != card->tx_chain.head)
  1263. spider_net_kick_tx_dma(card);
  1264. */
  1265. show_error = 0;
  1266. break;
  1267. /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
  1268. /* case SPIDER_NET_GFREECNTINT: not used. print a message */
  1269. }
  1270. /* check GHIINT1STS ************************************/
  1271. if (error_reg1)
  1272. for (i = 0; i < 32; i++)
  1273. if (error_reg1 & (1<<i))
  1274. switch (i)
  1275. {
  1276. case SPIDER_NET_GTMFLLINT:
  1277. /* TX RAM full may happen on a usual case.
  1278. * Logging is not needed. */
  1279. show_error = 0;
  1280. break;
  1281. case SPIDER_NET_GRFDFLLINT: /* fallthrough */
  1282. case SPIDER_NET_GRFCFLLINT: /* fallthrough */
  1283. case SPIDER_NET_GRFBFLLINT: /* fallthrough */
  1284. case SPIDER_NET_GRFAFLLINT: /* fallthrough */
  1285. case SPIDER_NET_GRMFLLINT:
  1286. if (netif_msg_intr(card) && net_ratelimit())
  1287. pr_err("Spider RX RAM full, incoming packets "
  1288. "might be discarded!\n");
  1289. spider_net_rx_irq_off(card);
  1290. netif_rx_schedule(card->netdev);
  1291. show_error = 0;
  1292. break;
  1293. /* case SPIDER_NET_GTMSHTINT: problem, print a message */
  1294. case SPIDER_NET_GDTINVDINT:
  1295. /* allrighty. tx from previous descr ok */
  1296. show_error = 0;
  1297. break;
  1298. /* chain end */
  1299. case SPIDER_NET_GDDDCEINT: /* fallthrough */
  1300. case SPIDER_NET_GDCDCEINT: /* fallthrough */
  1301. case SPIDER_NET_GDBDCEINT: /* fallthrough */
  1302. case SPIDER_NET_GDADCEINT:
  1303. if (netif_msg_intr(card) && net_ratelimit())
  1304. pr_err("got descriptor chain end interrupt, "
  1305. "restarting DMAC %c.\n",
  1306. 'D'-(i-SPIDER_NET_GDDDCEINT)/3);
  1307. spider_net_refill_rx_chain(card);
  1308. spider_net_enable_rxdmac(card);
  1309. show_error = 0;
  1310. break;
  1311. /* invalid descriptor */
  1312. case SPIDER_NET_GDDINVDINT: /* fallthrough */
  1313. case SPIDER_NET_GDCINVDINT: /* fallthrough */
  1314. case SPIDER_NET_GDBINVDINT: /* fallthrough */
  1315. case SPIDER_NET_GDAINVDINT:
  1316. /* could happen when rx chain is full */
  1317. spider_net_refill_rx_chain(card);
  1318. spider_net_enable_rxdmac(card);
  1319. show_error = 0;
  1320. break;
  1321. /* case SPIDER_NET_GDTRSERINT: problem, print a message */
  1322. /* case SPIDER_NET_GDDRSERINT: problem, print a message */
  1323. /* case SPIDER_NET_GDCRSERINT: problem, print a message */
  1324. /* case SPIDER_NET_GDBRSERINT: problem, print a message */
  1325. /* case SPIDER_NET_GDARSERINT: problem, print a message */
  1326. /* case SPIDER_NET_GDSERINT: problem, print a message */
  1327. /* case SPIDER_NET_GDTPTERINT: problem, print a message */
  1328. /* case SPIDER_NET_GDDPTERINT: problem, print a message */
  1329. /* case SPIDER_NET_GDCPTERINT: problem, print a message */
  1330. /* case SPIDER_NET_GDBPTERINT: problem, print a message */
  1331. /* case SPIDER_NET_GDAPTERINT: problem, print a message */
  1332. default:
  1333. show_error = 1;
  1334. break;
  1335. }
  1336. /* check GHIINT2STS ************************************/
  1337. if (error_reg2)
  1338. for (i = 0; i < 32; i++)
  1339. if (error_reg2 & (1<<i))
  1340. switch (i)
  1341. {
  1342. /* there is nothing we can (want to) do at this time. Log a
  1343. * message, we can switch on and off the specific values later on
  1344. case SPIDER_NET_GPROPERINT:
  1345. case SPIDER_NET_GMCTCRSNGINT:
  1346. case SPIDER_NET_GMCTLCOLINT:
  1347. case SPIDER_NET_GMCTTMOTINT:
  1348. case SPIDER_NET_GMCRCAERINT:
  1349. case SPIDER_NET_GMCRCALERINT:
  1350. case SPIDER_NET_GMCRALNERINT:
  1351. case SPIDER_NET_GMCROVRINT:
  1352. case SPIDER_NET_GMCRRNTINT:
  1353. case SPIDER_NET_GMCRRXERINT:
  1354. case SPIDER_NET_GTITCSERINT:
  1355. case SPIDER_NET_GTIFMTERINT:
  1356. case SPIDER_NET_GTIPKTRVKINT:
  1357. case SPIDER_NET_GTISPINGINT:
  1358. case SPIDER_NET_GTISADNGINT:
  1359. case SPIDER_NET_GTISPDNGINT:
  1360. case SPIDER_NET_GRIFMTERINT:
  1361. case SPIDER_NET_GRIPKTRVKINT:
  1362. case SPIDER_NET_GRISPINGINT:
  1363. case SPIDER_NET_GRISADNGINT:
  1364. case SPIDER_NET_GRISPDNGINT:
  1365. break;
  1366. */
  1367. default:
  1368. break;
  1369. }
  1370. if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
  1371. pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, "
  1372. "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
  1373. card->netdev->name,
  1374. status_reg, error_reg1, error_reg2);
  1375. /* clear interrupt sources */
  1376. spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
  1377. spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
  1378. }
  1379. /**
  1380. * spider_net_interrupt - interrupt handler for spider_net
  1381. * @irq: interupt number
  1382. * @ptr: pointer to net_device
  1383. * @regs: PU registers
  1384. *
  1385. * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
  1386. * interrupt found raised by card.
  1387. *
  1388. * This is the interrupt handler, that turns off
  1389. * interrupts for this device and makes the stack poll the driver
  1390. */
  1391. static irqreturn_t
  1392. spider_net_interrupt(int irq, void *ptr)
  1393. {
  1394. struct net_device *netdev = ptr;
  1395. struct spider_net_card *card = netdev_priv(netdev);
  1396. u32 status_reg;
  1397. status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
  1398. if (!status_reg)
  1399. return IRQ_NONE;
  1400. if (status_reg & SPIDER_NET_RXINT ) {
  1401. spider_net_rx_irq_off(card);
  1402. netif_rx_schedule(netdev);
  1403. }
  1404. if (status_reg & SPIDER_NET_TXINT)
  1405. netif_rx_schedule(netdev);
  1406. if (status_reg & SPIDER_NET_LINKINT)
  1407. spider_net_link_reset(netdev);
  1408. if (status_reg & SPIDER_NET_ERRINT )
  1409. spider_net_handle_error_irq(card, status_reg);
  1410. /* clear interrupt sources */
  1411. spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
  1412. return IRQ_HANDLED;
  1413. }
  1414. #ifdef CONFIG_NET_POLL_CONTROLLER
  1415. /**
  1416. * spider_net_poll_controller - artificial interrupt for netconsole etc.
  1417. * @netdev: interface device structure
  1418. *
  1419. * see Documentation/networking/netconsole.txt
  1420. */
  1421. static void
  1422. spider_net_poll_controller(struct net_device *netdev)
  1423. {
  1424. disable_irq(netdev->irq);
  1425. spider_net_interrupt(netdev->irq, netdev);
  1426. enable_irq(netdev->irq);
  1427. }
  1428. #endif /* CONFIG_NET_POLL_CONTROLLER */
  1429. /**
  1430. * spider_net_init_card - initializes the card
  1431. * @card: card structure
  1432. *
  1433. * spider_net_init_card initializes the card so that other registers can
  1434. * be used
  1435. */
  1436. static void
  1437. spider_net_init_card(struct spider_net_card *card)
  1438. {
  1439. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  1440. SPIDER_NET_CKRCTRL_STOP_VALUE);
  1441. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  1442. SPIDER_NET_CKRCTRL_RUN_VALUE);
  1443. /* trigger ETOMOD signal */
  1444. spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
  1445. spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
  1446. }
  1447. /**
  1448. * spider_net_enable_card - enables the card by setting all kinds of regs
  1449. * @card: card structure
  1450. *
  1451. * spider_net_enable_card sets a lot of SMMIO registers to enable the device
  1452. */
  1453. static void
  1454. spider_net_enable_card(struct spider_net_card *card)
  1455. {
  1456. int i;
  1457. /* the following array consists of (register),(value) pairs
  1458. * that are set in this function. A register of 0 ends the list */
  1459. u32 regs[][2] = {
  1460. { SPIDER_NET_GRESUMINTNUM, 0 },
  1461. { SPIDER_NET_GREINTNUM, 0 },
  1462. /* set interrupt frame number registers */
  1463. /* clear the single DMA engine registers first */
  1464. { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
  1465. { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
  1466. { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
  1467. { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
  1468. /* then set, what we really need */
  1469. { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
  1470. /* timer counter registers and stuff */
  1471. { SPIDER_NET_GFREECNNUM, 0 },
  1472. { SPIDER_NET_GONETIMENUM, 0 },
  1473. { SPIDER_NET_GTOUTFRMNUM, 0 },
  1474. /* RX mode setting */
  1475. { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
  1476. /* TX mode setting */
  1477. { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
  1478. /* IPSEC mode setting */
  1479. { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
  1480. { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
  1481. { SPIDER_NET_GMRWOLCTRL, 0 },
  1482. { SPIDER_NET_GTESTMD, 0x10000000 },
  1483. { SPIDER_NET_GTTQMSK, 0x00400040 },
  1484. { SPIDER_NET_GMACINTEN, 0 },
  1485. /* flow control stuff */
  1486. { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
  1487. { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
  1488. { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
  1489. { 0, 0}
  1490. };
  1491. i = 0;
  1492. while (regs[i][0]) {
  1493. spider_net_write_reg(card, regs[i][0], regs[i][1]);
  1494. i++;
  1495. }
  1496. /* clear unicast filter table entries 1 to 14 */
  1497. for (i = 1; i <= 14; i++) {
  1498. spider_net_write_reg(card,
  1499. SPIDER_NET_GMRUAFILnR + i * 8,
  1500. 0x00080000);
  1501. spider_net_write_reg(card,
  1502. SPIDER_NET_GMRUAFILnR + i * 8 + 4,
  1503. 0x00000000);
  1504. }
  1505. spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
  1506. spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
  1507. /* set chain tail adress for RX chains and
  1508. * enable DMA */
  1509. spider_net_enable_rxchtails(card);
  1510. spider_net_enable_rxdmac(card);
  1511. spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
  1512. spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
  1513. SPIDER_NET_LENLMT_VALUE);
  1514. spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
  1515. SPIDER_NET_OPMODE_VALUE);
  1516. /* set interrupt mask registers */
  1517. spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
  1518. SPIDER_NET_INT0_MASK_VALUE);
  1519. spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
  1520. SPIDER_NET_INT1_MASK_VALUE);
  1521. spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
  1522. SPIDER_NET_INT2_MASK_VALUE);
  1523. spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
  1524. SPIDER_NET_GDTBSTA);
  1525. }
  1526. /**
  1527. * spider_net_download_firmware - loads firmware into the adapter
  1528. * @card: card structure
  1529. * @firmware_ptr: pointer to firmware data
  1530. *
  1531. * spider_net_download_firmware loads the firmware data into the
  1532. * adapter. It assumes the length etc. to be allright.
  1533. */
  1534. static int
  1535. spider_net_download_firmware(struct spider_net_card *card,
  1536. const void *firmware_ptr)
  1537. {
  1538. int sequencer, i;
  1539. const u32 *fw_ptr = firmware_ptr;
  1540. /* stop sequencers */
  1541. spider_net_write_reg(card, SPIDER_NET_GSINIT,
  1542. SPIDER_NET_STOP_SEQ_VALUE);
  1543. for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
  1544. sequencer++) {
  1545. spider_net_write_reg(card,
  1546. SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
  1547. for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
  1548. spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
  1549. sequencer * 8, *fw_ptr);
  1550. fw_ptr++;
  1551. }
  1552. }
  1553. if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
  1554. return -EIO;
  1555. spider_net_write_reg(card, SPIDER_NET_GSINIT,
  1556. SPIDER_NET_RUN_SEQ_VALUE);
  1557. return 0;
  1558. }
  1559. /**
  1560. * spider_net_init_firmware - reads in firmware parts
  1561. * @card: card structure
  1562. *
  1563. * Returns 0 on success, <0 on failure
  1564. *
  1565. * spider_net_init_firmware opens the sequencer firmware and does some basic
  1566. * checks. This function opens and releases the firmware structure. A call
  1567. * to download the firmware is performed before the release.
  1568. *
  1569. * Firmware format
  1570. * ===============
  1571. * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
  1572. * the program for each sequencer. Use the command
  1573. * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
  1574. * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
  1575. * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
  1576. *
  1577. * to generate spider_fw.bin, if you have sequencer programs with something
  1578. * like the following contents for each sequencer:
  1579. * <ONE LINE COMMENT>
  1580. * <FIRST 4-BYTES-WORD FOR SEQUENCER>
  1581. * <SECOND 4-BYTES-WORD FOR SEQUENCER>
  1582. * ...
  1583. * <1024th 4-BYTES-WORD FOR SEQUENCER>
  1584. */
  1585. static int
  1586. spider_net_init_firmware(struct spider_net_card *card)
  1587. {
  1588. struct firmware *firmware = NULL;
  1589. struct device_node *dn;
  1590. const u8 *fw_prop = NULL;
  1591. int err = -ENOENT;
  1592. int fw_size;
  1593. if (request_firmware((const struct firmware **)&firmware,
  1594. SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
  1595. if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
  1596. netif_msg_probe(card) ) {
  1597. pr_err("Incorrect size of spidernet firmware in " \
  1598. "filesystem. Looking in host firmware...\n");
  1599. goto try_host_fw;
  1600. }
  1601. err = spider_net_download_firmware(card, firmware->data);
  1602. release_firmware(firmware);
  1603. if (err)
  1604. goto try_host_fw;
  1605. goto done;
  1606. }
  1607. try_host_fw:
  1608. dn = pci_device_to_OF_node(card->pdev);
  1609. if (!dn)
  1610. goto out_err;
  1611. fw_prop = get_property(dn, "firmware", &fw_size);
  1612. if (!fw_prop)
  1613. goto out_err;
  1614. if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
  1615. netif_msg_probe(card) ) {
  1616. pr_err("Incorrect size of spidernet firmware in " \
  1617. "host firmware\n");
  1618. goto done;
  1619. }
  1620. err = spider_net_download_firmware(card, fw_prop);
  1621. done:
  1622. return err;
  1623. out_err:
  1624. if (netif_msg_probe(card))
  1625. pr_err("Couldn't find spidernet firmware in filesystem " \
  1626. "or host firmware\n");
  1627. return err;
  1628. }
  1629. /**
  1630. * spider_net_open - called upon ifonfig up
  1631. * @netdev: interface device structure
  1632. *
  1633. * returns 0 on success, <0 on failure
  1634. *
  1635. * spider_net_open allocates all the descriptors and memory needed for
  1636. * operation, sets up multicast list and enables interrupts
  1637. */
  1638. int
  1639. spider_net_open(struct net_device *netdev)
  1640. {
  1641. struct spider_net_card *card = netdev_priv(netdev);
  1642. int result;
  1643. result = spider_net_init_firmware(card);
  1644. if (result)
  1645. goto init_firmware_failed;
  1646. /* start probing with copper */
  1647. spider_net_setup_aneg(card);
  1648. if (card->phy.def->phy_id)
  1649. mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
  1650. result = spider_net_init_chain(card, &card->tx_chain);
  1651. if (result)
  1652. goto alloc_tx_failed;
  1653. card->low_watermark = NULL;
  1654. result = spider_net_init_chain(card, &card->rx_chain);
  1655. if (result)
  1656. goto alloc_rx_failed;
  1657. /* Allocate rx skbs */
  1658. if (spider_net_alloc_rx_skbs(card))
  1659. goto alloc_skbs_failed;
  1660. spider_net_set_multi(netdev);
  1661. /* further enhancement: setup hw vlan, if needed */
  1662. result = -EBUSY;
  1663. if (request_irq(netdev->irq, spider_net_interrupt,
  1664. IRQF_SHARED, netdev->name, netdev))
  1665. goto register_int_failed;
  1666. spider_net_enable_card(card);
  1667. netif_start_queue(netdev);
  1668. netif_carrier_on(netdev);
  1669. netif_poll_enable(netdev);
  1670. return 0;
  1671. register_int_failed:
  1672. spider_net_free_rx_chain_contents(card);
  1673. alloc_skbs_failed:
  1674. spider_net_free_chain(card, &card->rx_chain);
  1675. alloc_rx_failed:
  1676. spider_net_free_chain(card, &card->tx_chain);
  1677. alloc_tx_failed:
  1678. del_timer_sync(&card->aneg_timer);
  1679. init_firmware_failed:
  1680. return result;
  1681. }
  1682. /**
  1683. * spider_net_link_phy
  1684. * @data: used for pointer to card structure
  1685. *
  1686. */
  1687. static void spider_net_link_phy(unsigned long data)
  1688. {
  1689. struct spider_net_card *card = (struct spider_net_card *)data;
  1690. struct mii_phy *phy = &card->phy;
  1691. /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
  1692. if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
  1693. pr_info("%s: link is down trying to bring it up\n", card->netdev->name);
  1694. switch (card->medium) {
  1695. case BCM54XX_COPPER:
  1696. /* enable fiber with autonegotiation first */
  1697. if (phy->def->ops->enable_fiber)
  1698. phy->def->ops->enable_fiber(phy, 1);
  1699. card->medium = BCM54XX_FIBER;
  1700. break;
  1701. case BCM54XX_FIBER:
  1702. /* fiber didn't come up, try to disable fiber autoneg */
  1703. if (phy->def->ops->enable_fiber)
  1704. phy->def->ops->enable_fiber(phy, 0);
  1705. card->medium = BCM54XX_UNKNOWN;
  1706. break;
  1707. case BCM54XX_UNKNOWN:
  1708. /* copper, fiber with and without failed,
  1709. * retry from beginning */
  1710. spider_net_setup_aneg(card);
  1711. card->medium = BCM54XX_COPPER;
  1712. break;
  1713. }
  1714. card->aneg_count = 0;
  1715. mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
  1716. return;
  1717. }
  1718. /* link still not up, try again later */
  1719. if (!(phy->def->ops->poll_link(phy))) {
  1720. card->aneg_count++;
  1721. mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
  1722. return;
  1723. }
  1724. /* link came up, get abilities */
  1725. phy->def->ops->read_link(phy);
  1726. spider_net_write_reg(card, SPIDER_NET_GMACST,
  1727. spider_net_read_reg(card, SPIDER_NET_GMACST));
  1728. spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
  1729. if (phy->speed == 1000)
  1730. spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
  1731. else
  1732. spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
  1733. card->aneg_count = 0;
  1734. pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n",
  1735. phy->def->name, phy->speed, phy->duplex==1 ? "Full" : "Half",
  1736. phy->autoneg==1 ? "" : "no ");
  1737. return;
  1738. }
  1739. /**
  1740. * spider_net_setup_phy - setup PHY
  1741. * @card: card structure
  1742. *
  1743. * returns 0 on success, <0 on failure
  1744. *
  1745. * spider_net_setup_phy is used as part of spider_net_probe.
  1746. **/
  1747. static int
  1748. spider_net_setup_phy(struct spider_net_card *card)
  1749. {
  1750. struct mii_phy *phy = &card->phy;
  1751. spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
  1752. SPIDER_NET_DMASEL_VALUE);
  1753. spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
  1754. SPIDER_NET_PHY_CTRL_VALUE);
  1755. phy->dev = card->netdev;
  1756. phy->mdio_read = spider_net_read_phy;
  1757. phy->mdio_write = spider_net_write_phy;
  1758. for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
  1759. unsigned short id;
  1760. id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
  1761. if (id != 0x0000 && id != 0xffff) {
  1762. if (!mii_phy_probe(phy, phy->mii_id)) {
  1763. pr_info("Found %s.\n", phy->def->name);
  1764. break;
  1765. }
  1766. }
  1767. }
  1768. return 0;
  1769. }
  1770. /**
  1771. * spider_net_workaround_rxramfull - work around firmware bug
  1772. * @card: card structure
  1773. *
  1774. * no return value
  1775. **/
  1776. static void
  1777. spider_net_workaround_rxramfull(struct spider_net_card *card)
  1778. {
  1779. int i, sequencer = 0;
  1780. /* cancel reset */
  1781. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  1782. SPIDER_NET_CKRCTRL_RUN_VALUE);
  1783. /* empty sequencer data */
  1784. for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
  1785. sequencer++) {
  1786. spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
  1787. sequencer * 8, 0x0);
  1788. for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
  1789. spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
  1790. sequencer * 8, 0x0);
  1791. }
  1792. }
  1793. /* set sequencer operation */
  1794. spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
  1795. /* reset */
  1796. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  1797. SPIDER_NET_CKRCTRL_STOP_VALUE);
  1798. }
  1799. /**
  1800. * spider_net_stop - called upon ifconfig down
  1801. * @netdev: interface device structure
  1802. *
  1803. * always returns 0
  1804. */
  1805. int
  1806. spider_net_stop(struct net_device *netdev)
  1807. {
  1808. struct spider_net_card *card = netdev_priv(netdev);
  1809. netif_poll_disable(netdev);
  1810. netif_carrier_off(netdev);
  1811. netif_stop_queue(netdev);
  1812. del_timer_sync(&card->tx_timer);
  1813. del_timer_sync(&card->aneg_timer);
  1814. /* disable/mask all interrupts */
  1815. spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
  1816. spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
  1817. spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
  1818. spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
  1819. free_irq(netdev->irq, netdev);
  1820. spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
  1821. SPIDER_NET_DMA_TX_FEND_VALUE);
  1822. /* turn off DMA, force end */
  1823. spider_net_disable_rxdmac(card);
  1824. /* release chains */
  1825. spider_net_release_tx_chain(card, 1);
  1826. spider_net_free_rx_chain_contents(card);
  1827. spider_net_free_chain(card, &card->tx_chain);
  1828. spider_net_free_chain(card, &card->rx_chain);
  1829. return 0;
  1830. }
  1831. /**
  1832. * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
  1833. * function (to be called not under interrupt status)
  1834. * @data: data, is interface device structure
  1835. *
  1836. * called as task when tx hangs, resets interface (if interface is up)
  1837. */
  1838. static void
  1839. spider_net_tx_timeout_task(struct work_struct *work)
  1840. {
  1841. struct spider_net_card *card =
  1842. container_of(work, struct spider_net_card, tx_timeout_task);
  1843. struct net_device *netdev = card->netdev;
  1844. if (!(netdev->flags & IFF_UP))
  1845. goto out;
  1846. netif_device_detach(netdev);
  1847. spider_net_stop(netdev);
  1848. spider_net_workaround_rxramfull(card);
  1849. spider_net_init_card(card);
  1850. if (spider_net_setup_phy(card))
  1851. goto out;
  1852. spider_net_open(netdev);
  1853. spider_net_kick_tx_dma(card);
  1854. netif_device_attach(netdev);
  1855. out:
  1856. atomic_dec(&card->tx_timeout_task_counter);
  1857. }
  1858. /**
  1859. * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
  1860. * @netdev: interface device structure
  1861. *
  1862. * called, if tx hangs. Schedules a task that resets the interface
  1863. */
  1864. static void
  1865. spider_net_tx_timeout(struct net_device *netdev)
  1866. {
  1867. struct spider_net_card *card;
  1868. card = netdev_priv(netdev);
  1869. atomic_inc(&card->tx_timeout_task_counter);
  1870. if (netdev->flags & IFF_UP)
  1871. schedule_work(&card->tx_timeout_task);
  1872. else
  1873. atomic_dec(&card->tx_timeout_task_counter);
  1874. card->spider_stats.tx_timeouts++;
  1875. }
  1876. /**
  1877. * spider_net_setup_netdev_ops - initialization of net_device operations
  1878. * @netdev: net_device structure
  1879. *
  1880. * fills out function pointers in the net_device structure
  1881. */
  1882. static void
  1883. spider_net_setup_netdev_ops(struct net_device *netdev)
  1884. {
  1885. netdev->open = &spider_net_open;
  1886. netdev->stop = &spider_net_stop;
  1887. netdev->hard_start_xmit = &spider_net_xmit;
  1888. netdev->get_stats = &spider_net_get_stats;
  1889. netdev->set_multicast_list = &spider_net_set_multi;
  1890. netdev->set_mac_address = &spider_net_set_mac;
  1891. netdev->change_mtu = &spider_net_change_mtu;
  1892. netdev->do_ioctl = &spider_net_do_ioctl;
  1893. /* tx watchdog */
  1894. netdev->tx_timeout = &spider_net_tx_timeout;
  1895. netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
  1896. /* NAPI */
  1897. netdev->poll = &spider_net_poll;
  1898. netdev->weight = SPIDER_NET_NAPI_WEIGHT;
  1899. /* HW VLAN */
  1900. netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
  1901. netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
  1902. netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
  1903. #ifdef CONFIG_NET_POLL_CONTROLLER
  1904. /* poll controller */
  1905. netdev->poll_controller = &spider_net_poll_controller;
  1906. #endif /* CONFIG_NET_POLL_CONTROLLER */
  1907. /* ethtool ops */
  1908. netdev->ethtool_ops = &spider_net_ethtool_ops;
  1909. }
  1910. /**
  1911. * spider_net_setup_netdev - initialization of net_device
  1912. * @card: card structure
  1913. *
  1914. * Returns 0 on success or <0 on failure
  1915. *
  1916. * spider_net_setup_netdev initializes the net_device structure
  1917. **/
  1918. static int
  1919. spider_net_setup_netdev(struct spider_net_card *card)
  1920. {
  1921. int result;
  1922. struct net_device *netdev = card->netdev;
  1923. struct device_node *dn;
  1924. struct sockaddr addr;
  1925. const u8 *mac;
  1926. SET_MODULE_OWNER(netdev);
  1927. SET_NETDEV_DEV(netdev, &card->pdev->dev);
  1928. pci_set_drvdata(card->pdev, netdev);
  1929. init_timer(&card->tx_timer);
  1930. card->tx_timer.function =
  1931. (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
  1932. card->tx_timer.data = (unsigned long) card;
  1933. netdev->irq = card->pdev->irq;
  1934. card->aneg_count = 0;
  1935. init_timer(&card->aneg_timer);
  1936. card->aneg_timer.function = spider_net_link_phy;
  1937. card->aneg_timer.data = (unsigned long) card;
  1938. card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
  1939. spider_net_setup_netdev_ops(netdev);
  1940. netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
  1941. /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
  1942. * NETIF_F_HW_VLAN_FILTER */
  1943. netdev->irq = card->pdev->irq;
  1944. dn = pci_device_to_OF_node(card->pdev);
  1945. if (!dn)
  1946. return -EIO;
  1947. mac = get_property(dn, "local-mac-address", NULL);
  1948. if (!mac)
  1949. return -EIO;
  1950. memcpy(addr.sa_data, mac, ETH_ALEN);
  1951. result = spider_net_set_mac(netdev, &addr);
  1952. if ((result) && (netif_msg_probe(card)))
  1953. pr_err("Failed to set MAC address: %i\n", result);
  1954. result = register_netdev(netdev);
  1955. if (result) {
  1956. if (netif_msg_probe(card))
  1957. pr_err("Couldn't register net_device: %i\n",
  1958. result);
  1959. return result;
  1960. }
  1961. if (netif_msg_probe(card))
  1962. pr_info("Initialized device %s.\n", netdev->name);
  1963. return 0;
  1964. }
  1965. /**
  1966. * spider_net_alloc_card - allocates net_device and card structure
  1967. *
  1968. * returns the card structure or NULL in case of errors
  1969. *
  1970. * the card and net_device structures are linked to each other
  1971. */
  1972. static struct spider_net_card *
  1973. spider_net_alloc_card(void)
  1974. {
  1975. struct net_device *netdev;
  1976. struct spider_net_card *card;
  1977. size_t alloc_size;
  1978. alloc_size = sizeof(struct spider_net_card) +
  1979. (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr);
  1980. netdev = alloc_etherdev(alloc_size);
  1981. if (!netdev)
  1982. return NULL;
  1983. card = netdev_priv(netdev);
  1984. card->netdev = netdev;
  1985. card->msg_enable = SPIDER_NET_DEFAULT_MSG;
  1986. INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
  1987. init_waitqueue_head(&card->waitq);
  1988. atomic_set(&card->tx_timeout_task_counter, 0);
  1989. card->rx_chain.num_desc = rx_descriptors;
  1990. card->rx_chain.ring = card->darray;
  1991. card->tx_chain.num_desc = tx_descriptors;
  1992. card->tx_chain.ring = card->darray + rx_descriptors;
  1993. return card;
  1994. }
  1995. /**
  1996. * spider_net_undo_pci_setup - releases PCI ressources
  1997. * @card: card structure
  1998. *
  1999. * spider_net_undo_pci_setup releases the mapped regions
  2000. */
  2001. static void
  2002. spider_net_undo_pci_setup(struct spider_net_card *card)
  2003. {
  2004. iounmap(card->regs);
  2005. pci_release_regions(card->pdev);
  2006. }
  2007. /**
  2008. * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
  2009. * @card: card structure
  2010. * @pdev: PCI device
  2011. *
  2012. * Returns the card structure or NULL if any errors occur
  2013. *
  2014. * spider_net_setup_pci_dev initializes pdev and together with the
  2015. * functions called in spider_net_open configures the device so that
  2016. * data can be transferred over it
  2017. * The net_device structure is attached to the card structure, if the
  2018. * function returns without error.
  2019. **/
  2020. static struct spider_net_card *
  2021. spider_net_setup_pci_dev(struct pci_dev *pdev)
  2022. {
  2023. struct spider_net_card *card;
  2024. unsigned long mmio_start, mmio_len;
  2025. if (pci_enable_device(pdev)) {
  2026. pr_err("Couldn't enable PCI device\n");
  2027. return NULL;
  2028. }
  2029. if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
  2030. pr_err("Couldn't find proper PCI device base address.\n");
  2031. goto out_disable_dev;
  2032. }
  2033. if (pci_request_regions(pdev, spider_net_driver_name)) {
  2034. pr_err("Couldn't obtain PCI resources, aborting.\n");
  2035. goto out_disable_dev;
  2036. }
  2037. pci_set_master(pdev);
  2038. card = spider_net_alloc_card();
  2039. if (!card) {
  2040. pr_err("Couldn't allocate net_device structure, "
  2041. "aborting.\n");
  2042. goto out_release_regions;
  2043. }
  2044. card->pdev = pdev;
  2045. /* fetch base address and length of first resource */
  2046. mmio_start = pci_resource_start(pdev, 0);
  2047. mmio_len = pci_resource_len(pdev, 0);
  2048. card->netdev->mem_start = mmio_start;
  2049. card->netdev->mem_end = mmio_start + mmio_len;
  2050. card->regs = ioremap(mmio_start, mmio_len);
  2051. if (!card->regs) {
  2052. pr_err("Couldn't obtain PCI resources, aborting.\n");
  2053. goto out_release_regions;
  2054. }
  2055. return card;
  2056. out_release_regions:
  2057. pci_release_regions(pdev);
  2058. out_disable_dev:
  2059. pci_disable_device(pdev);
  2060. pci_set_drvdata(pdev, NULL);
  2061. return NULL;
  2062. }
  2063. /**
  2064. * spider_net_probe - initialization of a device
  2065. * @pdev: PCI device
  2066. * @ent: entry in the device id list
  2067. *
  2068. * Returns 0 on success, <0 on failure
  2069. *
  2070. * spider_net_probe initializes pdev and registers a net_device
  2071. * structure for it. After that, the device can be ifconfig'ed up
  2072. **/
  2073. static int __devinit
  2074. spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  2075. {
  2076. int err = -EIO;
  2077. struct spider_net_card *card;
  2078. card = spider_net_setup_pci_dev(pdev);
  2079. if (!card)
  2080. goto out;
  2081. spider_net_workaround_rxramfull(card);
  2082. spider_net_init_card(card);
  2083. err = spider_net_setup_phy(card);
  2084. if (err)
  2085. goto out_undo_pci;
  2086. err = spider_net_setup_netdev(card);
  2087. if (err)
  2088. goto out_undo_pci;
  2089. return 0;
  2090. out_undo_pci:
  2091. spider_net_undo_pci_setup(card);
  2092. free_netdev(card->netdev);
  2093. out:
  2094. return err;
  2095. }
  2096. /**
  2097. * spider_net_remove - removal of a device
  2098. * @pdev: PCI device
  2099. *
  2100. * Returns 0 on success, <0 on failure
  2101. *
  2102. * spider_net_remove is called to remove the device and unregisters the
  2103. * net_device
  2104. **/
  2105. static void __devexit
  2106. spider_net_remove(struct pci_dev *pdev)
  2107. {
  2108. struct net_device *netdev;
  2109. struct spider_net_card *card;
  2110. netdev = pci_get_drvdata(pdev);
  2111. card = netdev_priv(netdev);
  2112. wait_event(card->waitq,
  2113. atomic_read(&card->tx_timeout_task_counter) == 0);
  2114. unregister_netdev(netdev);
  2115. /* switch off card */
  2116. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  2117. SPIDER_NET_CKRCTRL_STOP_VALUE);
  2118. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  2119. SPIDER_NET_CKRCTRL_RUN_VALUE);
  2120. spider_net_undo_pci_setup(card);
  2121. free_netdev(netdev);
  2122. }
  2123. static struct pci_driver spider_net_driver = {
  2124. .name = spider_net_driver_name,
  2125. .id_table = spider_net_pci_tbl,
  2126. .probe = spider_net_probe,
  2127. .remove = __devexit_p(spider_net_remove)
  2128. };
  2129. /**
  2130. * spider_net_init - init function when the driver is loaded
  2131. *
  2132. * spider_net_init registers the device driver
  2133. */
  2134. static int __init spider_net_init(void)
  2135. {
  2136. printk(KERN_INFO "Spidernet version %s.\n", VERSION);
  2137. if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
  2138. rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
  2139. pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
  2140. }
  2141. if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
  2142. rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
  2143. pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
  2144. }
  2145. if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
  2146. tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
  2147. pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
  2148. }
  2149. if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
  2150. tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
  2151. pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
  2152. }
  2153. return pci_register_driver(&spider_net_driver);
  2154. }
  2155. /**
  2156. * spider_net_cleanup - exit function when driver is unloaded
  2157. *
  2158. * spider_net_cleanup unregisters the device driver
  2159. */
  2160. static void __exit spider_net_cleanup(void)
  2161. {
  2162. pci_unregister_driver(&spider_net_driver);
  2163. }
  2164. module_init(spider_net_init);
  2165. module_exit(spider_net_cleanup);