spider_net.c 61 KB

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  1. /*
  2. * Network device driver for Cell Processor-Based Blade
  3. *
  4. * (C) Copyright IBM Corp. 2005
  5. *
  6. * Authors : Utz Bacher <utz.bacher@de.ibm.com>
  7. * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
  8. *
  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)
  12. * any later version.
  13. *
  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.
  18. *
  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.
  22. */
  23. #include <linux/compiler.h>
  24. #include <linux/crc32.h>
  25. #include <linux/delay.h>
  26. #include <linux/etherdevice.h>
  27. #include <linux/ethtool.h>
  28. #include <linux/firmware.h>
  29. #include <linux/if_vlan.h>
  30. #include <linux/in.h>
  31. #include <linux/init.h>
  32. #include <linux/ioport.h>
  33. #include <linux/ip.h>
  34. #include <linux/kernel.h>
  35. #include <linux/mii.h>
  36. #include <linux/module.h>
  37. #include <linux/netdevice.h>
  38. #include <linux/device.h>
  39. #include <linux/pci.h>
  40. #include <linux/skbuff.h>
  41. #include <linux/slab.h>
  42. #include <linux/tcp.h>
  43. #include <linux/types.h>
  44. #include <linux/vmalloc.h>
  45. #include <linux/wait.h>
  46. #include <linux/workqueue.h>
  47. #include <asm/bitops.h>
  48. #include <asm/pci-bridge.h>
  49. #include <net/checksum.h>
  50. #include "spider_net.h"
  51. MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
  52. "<Jens.Osterkamp@de.ibm.com>");
  53. MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
  54. MODULE_LICENSE("GPL");
  55. MODULE_VERSION(VERSION);
  56. static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
  57. static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
  58. module_param(rx_descriptors, int, 0444);
  59. module_param(tx_descriptors, int, 0444);
  60. MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
  61. "in rx chains");
  62. MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
  63. "in tx chain");
  64. char spider_net_driver_name[] = "spidernet";
  65. static struct pci_device_id spider_net_pci_tbl[] = {
  66. { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
  67. PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
  68. { 0, }
  69. };
  70. MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
  71. /**
  72. * spider_net_read_reg - reads an SMMIO register of a card
  73. * @card: device structure
  74. * @reg: register to read from
  75. *
  76. * returns the content of the specified SMMIO register.
  77. */
  78. static inline u32
  79. spider_net_read_reg(struct spider_net_card *card, u32 reg)
  80. {
  81. u32 value;
  82. value = readl(card->regs + reg);
  83. value = le32_to_cpu(value);
  84. return value;
  85. }
  86. /**
  87. * spider_net_write_reg - writes to an SMMIO register of a card
  88. * @card: device structure
  89. * @reg: register to write to
  90. * @value: value to write into the specified SMMIO register
  91. */
  92. static inline void
  93. spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
  94. {
  95. value = cpu_to_le32(value);
  96. writel(value, card->regs + reg);
  97. }
  98. /** spider_net_write_phy - write to phy register
  99. * @netdev: adapter to be written to
  100. * @mii_id: id of MII
  101. * @reg: PHY register
  102. * @val: value to be written to phy register
  103. *
  104. * spider_net_write_phy_register writes to an arbitrary PHY
  105. * register via the spider GPCWOPCMD register. We assume the queue does
  106. * not run full (not more than 15 commands outstanding).
  107. **/
  108. static void
  109. spider_net_write_phy(struct net_device *netdev, int mii_id,
  110. int reg, int val)
  111. {
  112. struct spider_net_card *card = netdev_priv(netdev);
  113. u32 writevalue;
  114. writevalue = ((u32)mii_id << 21) |
  115. ((u32)reg << 16) | ((u32)val);
  116. spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
  117. }
  118. /** spider_net_read_phy - read from phy register
  119. * @netdev: network device to be read from
  120. * @mii_id: id of MII
  121. * @reg: PHY register
  122. *
  123. * Returns value read from PHY register
  124. *
  125. * spider_net_write_phy reads from an arbitrary PHY
  126. * register via the spider GPCROPCMD register
  127. **/
  128. static int
  129. spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
  130. {
  131. struct spider_net_card *card = netdev_priv(netdev);
  132. u32 readvalue;
  133. readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
  134. spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
  135. /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
  136. * interrupt, as we poll for the completion of the read operation
  137. * in spider_net_read_phy. Should take about 50 us */
  138. do {
  139. readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
  140. } while (readvalue & SPIDER_NET_GPREXEC);
  141. readvalue &= SPIDER_NET_GPRDAT_MASK;
  142. return readvalue;
  143. }
  144. /**
  145. * spider_net_rx_irq_off - switch off rx irq on this spider card
  146. * @card: device structure
  147. *
  148. * switches off rx irq by masking them out in the GHIINTnMSK register
  149. */
  150. static void
  151. spider_net_rx_irq_off(struct spider_net_card *card)
  152. {
  153. u32 regvalue;
  154. regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
  155. spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
  156. }
  157. /**
  158. * spider_net_rx_irq_on - switch on rx irq on this spider card
  159. * @card: device structure
  160. *
  161. * switches on rx irq by enabling them in the GHIINTnMSK register
  162. */
  163. static void
  164. spider_net_rx_irq_on(struct spider_net_card *card)
  165. {
  166. u32 regvalue;
  167. regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
  168. spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
  169. }
  170. /**
  171. * spider_net_set_promisc - sets the unicast address or the promiscuous mode
  172. * @card: card structure
  173. *
  174. * spider_net_set_promisc sets the unicast destination address filter and
  175. * thus either allows for non-promisc mode or promisc mode
  176. */
  177. static void
  178. spider_net_set_promisc(struct spider_net_card *card)
  179. {
  180. u32 macu, macl;
  181. struct net_device *netdev = card->netdev;
  182. if (netdev->flags & IFF_PROMISC) {
  183. /* clear destination entry 0 */
  184. spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
  185. spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
  186. spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
  187. SPIDER_NET_PROMISC_VALUE);
  188. } else {
  189. macu = netdev->dev_addr[0];
  190. macu <<= 8;
  191. macu |= netdev->dev_addr[1];
  192. memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
  193. macu |= SPIDER_NET_UA_DESCR_VALUE;
  194. spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
  195. spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
  196. spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
  197. SPIDER_NET_NONPROMISC_VALUE);
  198. }
  199. }
  200. /**
  201. * spider_net_get_mac_address - read mac address from spider card
  202. * @card: device structure
  203. *
  204. * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
  205. */
  206. static int
  207. spider_net_get_mac_address(struct net_device *netdev)
  208. {
  209. struct spider_net_card *card = netdev_priv(netdev);
  210. u32 macl, macu;
  211. macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
  212. macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
  213. netdev->dev_addr[0] = (macu >> 24) & 0xff;
  214. netdev->dev_addr[1] = (macu >> 16) & 0xff;
  215. netdev->dev_addr[2] = (macu >> 8) & 0xff;
  216. netdev->dev_addr[3] = macu & 0xff;
  217. netdev->dev_addr[4] = (macl >> 8) & 0xff;
  218. netdev->dev_addr[5] = macl & 0xff;
  219. if (!is_valid_ether_addr(&netdev->dev_addr[0]))
  220. return -EINVAL;
  221. return 0;
  222. }
  223. /**
  224. * spider_net_get_descr_status -- returns the status of a descriptor
  225. * @descr: descriptor to look at
  226. *
  227. * returns the status as in the dmac_cmd_status field of the descriptor
  228. */
  229. static inline int
  230. spider_net_get_descr_status(struct spider_net_descr *descr)
  231. {
  232. return descr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
  233. }
  234. /**
  235. * spider_net_free_chain - free descriptor chain
  236. * @card: card structure
  237. * @chain: address of chain
  238. *
  239. */
  240. static void
  241. spider_net_free_chain(struct spider_net_card *card,
  242. struct spider_net_descr_chain *chain)
  243. {
  244. struct spider_net_descr *descr;
  245. for (descr = chain->tail; !descr->bus_addr; descr = descr->next) {
  246. pci_unmap_single(card->pdev, descr->bus_addr,
  247. SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
  248. descr->bus_addr = 0;
  249. }
  250. }
  251. /**
  252. * spider_net_init_chain - links descriptor chain
  253. * @card: card structure
  254. * @chain: address of chain
  255. * @start_descr: address of descriptor array
  256. * @no: number of descriptors
  257. *
  258. * we manage a circular list that mirrors the hardware structure,
  259. * except that the hardware uses bus addresses.
  260. *
  261. * returns 0 on success, <0 on failure
  262. */
  263. static int
  264. spider_net_init_chain(struct spider_net_card *card,
  265. struct spider_net_descr_chain *chain,
  266. struct spider_net_descr *start_descr,
  267. int direction, int no)
  268. {
  269. int i;
  270. struct spider_net_descr *descr;
  271. dma_addr_t buf;
  272. descr = start_descr;
  273. memset(descr, 0, sizeof(*descr) * no);
  274. /* set up the hardware pointers in each descriptor */
  275. for (i=0; i<no; i++, descr++) {
  276. descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
  277. buf = pci_map_single(card->pdev, descr,
  278. SPIDER_NET_DESCR_SIZE,
  279. direction);
  280. if (pci_dma_mapping_error(buf))
  281. goto iommu_error;
  282. descr->bus_addr = buf;
  283. descr->next = descr + 1;
  284. descr->prev = descr - 1;
  285. }
  286. /* do actual circular list */
  287. (descr-1)->next = start_descr;
  288. start_descr->prev = descr-1;
  289. descr = start_descr;
  290. if (direction == PCI_DMA_FROMDEVICE)
  291. for (i=0; i < no; i++, descr++)
  292. descr->next_descr_addr = descr->next->bus_addr;
  293. spin_lock_init(&chain->lock);
  294. chain->head = start_descr;
  295. chain->tail = start_descr;
  296. return 0;
  297. iommu_error:
  298. descr = start_descr;
  299. for (i=0; i < no; i++, descr++)
  300. if (descr->bus_addr)
  301. pci_unmap_single(card->pdev, descr->bus_addr,
  302. SPIDER_NET_DESCR_SIZE,
  303. direction);
  304. return -ENOMEM;
  305. }
  306. /**
  307. * spider_net_free_rx_chain_contents - frees descr contents in rx chain
  308. * @card: card structure
  309. *
  310. * returns 0 on success, <0 on failure
  311. */
  312. static void
  313. spider_net_free_rx_chain_contents(struct spider_net_card *card)
  314. {
  315. struct spider_net_descr *descr;
  316. descr = card->rx_chain.head;
  317. while (descr->next != card->rx_chain.head) {
  318. if (descr->skb) {
  319. dev_kfree_skb(descr->skb);
  320. pci_unmap_single(card->pdev, descr->buf_addr,
  321. SPIDER_NET_MAX_FRAME,
  322. PCI_DMA_FROMDEVICE);
  323. }
  324. descr = descr->next;
  325. }
  326. }
  327. /**
  328. * spider_net_prepare_rx_descr - reinitializes a rx descriptor
  329. * @card: card structure
  330. * @descr: descriptor to re-init
  331. *
  332. * return 0 on succes, <0 on failure
  333. *
  334. * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
  335. * Activate the descriptor state-wise
  336. */
  337. static int
  338. spider_net_prepare_rx_descr(struct spider_net_card *card,
  339. struct spider_net_descr *descr)
  340. {
  341. dma_addr_t buf;
  342. int error = 0;
  343. int offset;
  344. int bufsize;
  345. /* we need to round up the buffer size to a multiple of 128 */
  346. bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
  347. (~(SPIDER_NET_RXBUF_ALIGN - 1));
  348. /* and we need to have it 128 byte aligned, therefore we allocate a
  349. * bit more */
  350. /* allocate an skb */
  351. descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
  352. if (!descr->skb) {
  353. if (netif_msg_rx_err(card) && net_ratelimit())
  354. pr_err("Not enough memory to allocate rx buffer\n");
  355. card->spider_stats.alloc_rx_skb_error++;
  356. return -ENOMEM;
  357. }
  358. descr->buf_size = bufsize;
  359. descr->result_size = 0;
  360. descr->valid_size = 0;
  361. descr->data_status = 0;
  362. descr->data_error = 0;
  363. offset = ((unsigned long)descr->skb->data) &
  364. (SPIDER_NET_RXBUF_ALIGN - 1);
  365. if (offset)
  366. skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
  367. /* io-mmu-map the skb */
  368. buf = pci_map_single(card->pdev, descr->skb->data,
  369. SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
  370. descr->buf_addr = buf;
  371. if (pci_dma_mapping_error(buf)) {
  372. dev_kfree_skb_any(descr->skb);
  373. if (netif_msg_rx_err(card) && net_ratelimit())
  374. pr_err("Could not iommu-map rx buffer\n");
  375. card->spider_stats.rx_iommu_map_error++;
  376. descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
  377. } else {
  378. descr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
  379. SPIDER_NET_DMAC_NOINTR_COMPLETE;
  380. }
  381. return error;
  382. }
  383. /**
  384. * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
  385. * @card: card structure
  386. *
  387. * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
  388. * chip by writing to the appropriate register. DMA is enabled in
  389. * spider_net_enable_rxdmac.
  390. */
  391. static inline void
  392. spider_net_enable_rxchtails(struct spider_net_card *card)
  393. {
  394. /* assume chain is aligned correctly */
  395. spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
  396. card->rx_chain.tail->bus_addr);
  397. }
  398. /**
  399. * spider_net_enable_rxdmac - enables a receive DMA controller
  400. * @card: card structure
  401. *
  402. * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
  403. * in the GDADMACCNTR register
  404. */
  405. static inline void
  406. spider_net_enable_rxdmac(struct spider_net_card *card)
  407. {
  408. wmb();
  409. spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
  410. SPIDER_NET_DMA_RX_VALUE);
  411. }
  412. /**
  413. * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
  414. * @card: card structure
  415. *
  416. * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
  417. */
  418. static void
  419. spider_net_refill_rx_chain(struct spider_net_card *card)
  420. {
  421. struct spider_net_descr_chain *chain = &card->rx_chain;
  422. unsigned long flags;
  423. /* one context doing the refill (and a second context seeing that
  424. * and omitting it) is ok. If called by NAPI, we'll be called again
  425. * as spider_net_decode_one_descr is called several times. If some
  426. * interrupt calls us, the NAPI is about to clean up anyway. */
  427. if (!spin_trylock_irqsave(&chain->lock, flags))
  428. return;
  429. while (spider_net_get_descr_status(chain->head) ==
  430. SPIDER_NET_DESCR_NOT_IN_USE) {
  431. if (spider_net_prepare_rx_descr(card, chain->head))
  432. break;
  433. chain->head = chain->head->next;
  434. }
  435. spin_unlock_irqrestore(&chain->lock, flags);
  436. }
  437. /**
  438. * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
  439. * @card: card structure
  440. *
  441. * returns 0 on success, <0 on failure
  442. */
  443. static int
  444. spider_net_alloc_rx_skbs(struct spider_net_card *card)
  445. {
  446. int result;
  447. struct spider_net_descr_chain *chain;
  448. result = -ENOMEM;
  449. chain = &card->rx_chain;
  450. /* put at least one buffer into the chain. if this fails,
  451. * we've got a problem. if not, spider_net_refill_rx_chain
  452. * will do the rest at the end of this function */
  453. if (spider_net_prepare_rx_descr(card, chain->head))
  454. goto error;
  455. else
  456. chain->head = chain->head->next;
  457. /* this will allocate the rest of the rx buffers; if not, it's
  458. * business as usual later on */
  459. spider_net_refill_rx_chain(card);
  460. spider_net_enable_rxdmac(card);
  461. return 0;
  462. error:
  463. spider_net_free_rx_chain_contents(card);
  464. return result;
  465. }
  466. /**
  467. * spider_net_get_multicast_hash - generates hash for multicast filter table
  468. * @addr: multicast address
  469. *
  470. * returns the hash value.
  471. *
  472. * spider_net_get_multicast_hash calculates a hash value for a given multicast
  473. * address, that is used to set the multicast filter tables
  474. */
  475. static u8
  476. spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
  477. {
  478. u32 crc;
  479. u8 hash;
  480. char addr_for_crc[ETH_ALEN] = { 0, };
  481. int i, bit;
  482. for (i = 0; i < ETH_ALEN * 8; i++) {
  483. bit = (addr[i / 8] >> (i % 8)) & 1;
  484. addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
  485. }
  486. crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
  487. hash = (crc >> 27);
  488. hash <<= 3;
  489. hash |= crc & 7;
  490. hash &= 0xff;
  491. return hash;
  492. }
  493. /**
  494. * spider_net_set_multi - sets multicast addresses and promisc flags
  495. * @netdev: interface device structure
  496. *
  497. * spider_net_set_multi configures multicast addresses as needed for the
  498. * netdev interface. It also sets up multicast, allmulti and promisc
  499. * flags appropriately
  500. */
  501. static void
  502. spider_net_set_multi(struct net_device *netdev)
  503. {
  504. struct dev_mc_list *mc;
  505. u8 hash;
  506. int i;
  507. u32 reg;
  508. struct spider_net_card *card = netdev_priv(netdev);
  509. unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
  510. {0, };
  511. spider_net_set_promisc(card);
  512. if (netdev->flags & IFF_ALLMULTI) {
  513. for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
  514. set_bit(i, bitmask);
  515. }
  516. goto write_hash;
  517. }
  518. /* well, we know, what the broadcast hash value is: it's xfd
  519. hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
  520. set_bit(0xfd, bitmask);
  521. for (mc = netdev->mc_list; mc; mc = mc->next) {
  522. hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
  523. set_bit(hash, bitmask);
  524. }
  525. write_hash:
  526. for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
  527. reg = 0;
  528. if (test_bit(i * 4, bitmask))
  529. reg += 0x08;
  530. reg <<= 8;
  531. if (test_bit(i * 4 + 1, bitmask))
  532. reg += 0x08;
  533. reg <<= 8;
  534. if (test_bit(i * 4 + 2, bitmask))
  535. reg += 0x08;
  536. reg <<= 8;
  537. if (test_bit(i * 4 + 3, bitmask))
  538. reg += 0x08;
  539. spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
  540. }
  541. }
  542. /**
  543. * spider_net_disable_rxdmac - disables the receive DMA controller
  544. * @card: card structure
  545. *
  546. * spider_net_disable_rxdmac terminates processing on the DMA controller by
  547. * turing off DMA and issueing a force end
  548. */
  549. static void
  550. spider_net_disable_rxdmac(struct spider_net_card *card)
  551. {
  552. spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
  553. SPIDER_NET_DMA_RX_FEND_VALUE);
  554. }
  555. /**
  556. * spider_net_prepare_tx_descr - fill tx descriptor with skb data
  557. * @card: card structure
  558. * @descr: descriptor structure to fill out
  559. * @skb: packet to use
  560. *
  561. * returns 0 on success, <0 on failure.
  562. *
  563. * fills out the descriptor structure with skb data and len. Copies data,
  564. * if needed (32bit DMA!)
  565. */
  566. static int
  567. spider_net_prepare_tx_descr(struct spider_net_card *card,
  568. struct sk_buff *skb)
  569. {
  570. struct spider_net_descr *descr = card->tx_chain.head;
  571. dma_addr_t buf;
  572. int length;
  573. length = skb->len;
  574. if (length < ETH_ZLEN) {
  575. if (skb_pad(skb, ETH_ZLEN-length))
  576. return 0;
  577. length = ETH_ZLEN;
  578. }
  579. buf = pci_map_single(card->pdev, skb->data, length, PCI_DMA_TODEVICE);
  580. if (pci_dma_mapping_error(buf)) {
  581. if (netif_msg_tx_err(card) && net_ratelimit())
  582. pr_err("could not iommu-map packet (%p, %i). "
  583. "Dropping packet\n", skb->data, length);
  584. card->spider_stats.tx_iommu_map_error++;
  585. return -ENOMEM;
  586. }
  587. descr->buf_addr = buf;
  588. descr->buf_size = length;
  589. descr->next_descr_addr = 0;
  590. descr->skb = skb;
  591. descr->data_status = 0;
  592. descr->dmac_cmd_status =
  593. SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
  594. if (skb->protocol == htons(ETH_P_IP))
  595. switch (skb->nh.iph->protocol) {
  596. case IPPROTO_TCP:
  597. descr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
  598. break;
  599. case IPPROTO_UDP:
  600. descr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
  601. break;
  602. }
  603. descr->prev->next_descr_addr = descr->bus_addr;
  604. card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
  605. return 0;
  606. }
  607. /**
  608. * spider_net_release_tx_descr - processes a used tx descriptor
  609. * @card: card structure
  610. * @descr: descriptor to release
  611. *
  612. * releases a used tx descriptor (unmapping, freeing of skb)
  613. */
  614. static inline void
  615. spider_net_release_tx_descr(struct spider_net_card *card)
  616. {
  617. struct spider_net_descr *descr = card->tx_chain.tail;
  618. struct sk_buff *skb;
  619. unsigned int len;
  620. card->tx_chain.tail = card->tx_chain.tail->next;
  621. descr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
  622. /* unmap the skb */
  623. skb = descr->skb;
  624. if (!skb)
  625. return;
  626. len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
  627. pci_unmap_single(card->pdev, descr->buf_addr, len,
  628. PCI_DMA_TODEVICE);
  629. dev_kfree_skb_any(skb);
  630. }
  631. /**
  632. * spider_net_release_tx_chain - processes sent tx descriptors
  633. * @card: adapter structure
  634. * @brutal: if set, don't care about whether descriptor seems to be in use
  635. *
  636. * returns 0 if the tx ring is empty, otherwise 1.
  637. *
  638. * spider_net_release_tx_chain releases the tx descriptors that spider has
  639. * finished with (if non-brutal) or simply release tx descriptors (if brutal).
  640. * If some other context is calling this function, we return 1 so that we're
  641. * scheduled again (if we were scheduled) and will not loose initiative.
  642. */
  643. static int
  644. spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
  645. {
  646. struct spider_net_descr_chain *chain = &card->tx_chain;
  647. int status;
  648. spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR);
  649. while (chain->tail != chain->head) {
  650. status = spider_net_get_descr_status(chain->tail);
  651. switch (status) {
  652. case SPIDER_NET_DESCR_COMPLETE:
  653. card->netdev_stats.tx_packets++;
  654. card->netdev_stats.tx_bytes += chain->tail->skb->len;
  655. break;
  656. case SPIDER_NET_DESCR_CARDOWNED:
  657. if (!brutal)
  658. return 1;
  659. /* fallthrough, if we release the descriptors
  660. * brutally (then we don't care about
  661. * SPIDER_NET_DESCR_CARDOWNED) */
  662. case SPIDER_NET_DESCR_RESPONSE_ERROR:
  663. case SPIDER_NET_DESCR_PROTECTION_ERROR:
  664. case SPIDER_NET_DESCR_FORCE_END:
  665. if (netif_msg_tx_err(card))
  666. pr_err("%s: forcing end of tx descriptor "
  667. "with status x%02x\n",
  668. card->netdev->name, status);
  669. card->netdev_stats.tx_errors++;
  670. break;
  671. default:
  672. card->netdev_stats.tx_dropped++;
  673. if (!brutal)
  674. return 1;
  675. }
  676. spider_net_release_tx_descr(card);
  677. }
  678. return 0;
  679. }
  680. /**
  681. * spider_net_kick_tx_dma - enables TX DMA processing
  682. * @card: card structure
  683. * @descr: descriptor address to enable TX processing at
  684. *
  685. * spider_net_kick_tx_dma writes the current tx chain head as start address
  686. * of the tx descriptor chain and enables the transmission DMA engine
  687. */
  688. static inline void
  689. spider_net_kick_tx_dma(struct spider_net_card *card)
  690. {
  691. struct spider_net_descr *descr;
  692. if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
  693. SPIDER_NET_TX_DMA_EN)
  694. goto out;
  695. descr = card->tx_chain.tail;
  696. for (;;) {
  697. if (spider_net_get_descr_status(descr) ==
  698. SPIDER_NET_DESCR_CARDOWNED) {
  699. spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
  700. descr->bus_addr);
  701. spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
  702. SPIDER_NET_DMA_TX_VALUE);
  703. break;
  704. }
  705. if (descr == card->tx_chain.head)
  706. break;
  707. descr = descr->next;
  708. }
  709. out:
  710. mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
  711. }
  712. /**
  713. * spider_net_xmit - transmits a frame over the device
  714. * @skb: packet to send out
  715. * @netdev: interface device structure
  716. *
  717. * returns 0 on success, !0 on failure
  718. */
  719. static int
  720. spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
  721. {
  722. struct spider_net_card *card = netdev_priv(netdev);
  723. struct spider_net_descr_chain *chain = &card->tx_chain;
  724. struct spider_net_descr *descr = chain->head;
  725. unsigned long flags;
  726. spin_lock_irqsave(&chain->lock, flags);
  727. spider_net_release_tx_chain(card, 0);
  728. if ((chain->head->next == chain->tail->prev) ||
  729. (spider_net_get_descr_status(descr) != SPIDER_NET_DESCR_NOT_IN_USE) ||
  730. (spider_net_prepare_tx_descr(card, skb) != 0)) {
  731. card->netdev_stats.tx_dropped++;
  732. spin_unlock_irqrestore(&chain->lock, flags);
  733. netif_stop_queue(netdev);
  734. return NETDEV_TX_BUSY;
  735. }
  736. spider_net_kick_tx_dma(card);
  737. card->tx_chain.head = card->tx_chain.head->next;
  738. spin_unlock_irqrestore(&chain->lock, flags);
  739. return NETDEV_TX_OK;
  740. }
  741. /**
  742. * spider_net_cleanup_tx_ring - cleans up the TX ring
  743. * @card: card structure
  744. *
  745. * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
  746. * interrupts to cleanup our TX ring) and returns sent packets to the stack
  747. * by freeing them
  748. */
  749. static void
  750. spider_net_cleanup_tx_ring(struct spider_net_card *card)
  751. {
  752. unsigned long flags;
  753. spin_lock_irqsave(&card->tx_chain.lock, flags);
  754. if ((spider_net_release_tx_chain(card, 0) != 0) &&
  755. (card->netdev->flags & IFF_UP)) {
  756. spider_net_kick_tx_dma(card);
  757. netif_wake_queue(card->netdev);
  758. }
  759. spin_unlock_irqrestore(&card->tx_chain.lock, flags);
  760. }
  761. /**
  762. * spider_net_do_ioctl - called for device ioctls
  763. * @netdev: interface device structure
  764. * @ifr: request parameter structure for ioctl
  765. * @cmd: command code for ioctl
  766. *
  767. * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
  768. * -EOPNOTSUPP is returned, if an unknown ioctl was requested
  769. */
  770. static int
  771. spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
  772. {
  773. switch (cmd) {
  774. default:
  775. return -EOPNOTSUPP;
  776. }
  777. }
  778. /**
  779. * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
  780. * @descr: descriptor to process
  781. * @card: card structure
  782. * @napi: whether caller is in NAPI context
  783. *
  784. * returns 1 on success, 0 if no packet was passed to the stack
  785. *
  786. * iommu-unmaps the skb, fills out skb structure and passes the data to the
  787. * stack. The descriptor state is not changed.
  788. */
  789. static int
  790. spider_net_pass_skb_up(struct spider_net_descr *descr,
  791. struct spider_net_card *card, int napi)
  792. {
  793. struct sk_buff *skb;
  794. struct net_device *netdev;
  795. u32 data_status, data_error;
  796. data_status = descr->data_status;
  797. data_error = descr->data_error;
  798. netdev = card->netdev;
  799. /* unmap descriptor */
  800. pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME,
  801. PCI_DMA_FROMDEVICE);
  802. /* the cases we'll throw away the packet immediately */
  803. if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
  804. if (netif_msg_rx_err(card))
  805. pr_err("error in received descriptor found, "
  806. "data_status=x%08x, data_error=x%08x\n",
  807. data_status, data_error);
  808. card->spider_stats.rx_desc_error++;
  809. return 0;
  810. }
  811. skb = descr->skb;
  812. skb->dev = netdev;
  813. skb_put(skb, descr->valid_size);
  814. /* the card seems to add 2 bytes of junk in front
  815. * of the ethernet frame */
  816. #define SPIDER_MISALIGN 2
  817. skb_pull(skb, SPIDER_MISALIGN);
  818. skb->protocol = eth_type_trans(skb, netdev);
  819. /* checksum offload */
  820. if (card->options.rx_csum) {
  821. if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
  822. SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
  823. !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
  824. skb->ip_summed = CHECKSUM_UNNECESSARY;
  825. else
  826. skb->ip_summed = CHECKSUM_NONE;
  827. } else
  828. skb->ip_summed = CHECKSUM_NONE;
  829. if (data_status & SPIDER_NET_VLAN_PACKET) {
  830. /* further enhancements: HW-accel VLAN
  831. * vlan_hwaccel_receive_skb
  832. */
  833. }
  834. /* pass skb up to stack */
  835. if (napi)
  836. netif_receive_skb(skb);
  837. else
  838. netif_rx_ni(skb);
  839. /* update netdevice statistics */
  840. card->netdev_stats.rx_packets++;
  841. card->netdev_stats.rx_bytes += skb->len;
  842. return 1;
  843. }
  844. /**
  845. * spider_net_decode_one_descr - processes an rx descriptor
  846. * @card: card structure
  847. * @napi: whether caller is in NAPI context
  848. *
  849. * returns 1 if a packet has been sent to the stack, otherwise 0
  850. *
  851. * processes an rx descriptor by iommu-unmapping the data buffer and passing
  852. * the packet up to the stack. This function is called in softirq
  853. * context, e.g. either bottom half from interrupt or NAPI polling context
  854. */
  855. static int
  856. spider_net_decode_one_descr(struct spider_net_card *card, int napi)
  857. {
  858. struct spider_net_descr_chain *chain = &card->rx_chain;
  859. struct spider_net_descr *descr = chain->tail;
  860. int status;
  861. int result;
  862. status = spider_net_get_descr_status(descr);
  863. if (status == SPIDER_NET_DESCR_CARDOWNED) {
  864. /* nothing in the descriptor yet */
  865. result=0;
  866. goto out;
  867. }
  868. if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
  869. /* not initialized yet, the ring must be empty */
  870. spider_net_refill_rx_chain(card);
  871. spider_net_enable_rxdmac(card);
  872. result=0;
  873. goto out;
  874. }
  875. /* descriptor definitively used -- move on tail */
  876. chain->tail = descr->next;
  877. result = 0;
  878. if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
  879. (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
  880. (status == SPIDER_NET_DESCR_FORCE_END) ) {
  881. if (netif_msg_rx_err(card))
  882. pr_err("%s: dropping RX descriptor with state %d\n",
  883. card->netdev->name, status);
  884. card->netdev_stats.rx_dropped++;
  885. pci_unmap_single(card->pdev, descr->buf_addr,
  886. SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
  887. dev_kfree_skb_irq(descr->skb);
  888. goto refill;
  889. }
  890. if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
  891. (status != SPIDER_NET_DESCR_FRAME_END) ) {
  892. if (netif_msg_rx_err(card)) {
  893. pr_err("%s: RX descriptor with state %d\n",
  894. card->netdev->name, status);
  895. card->spider_stats.rx_desc_unk_state++;
  896. }
  897. goto refill;
  898. }
  899. /* ok, we've got a packet in descr */
  900. result = spider_net_pass_skb_up(descr, card, napi);
  901. refill:
  902. descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
  903. /* change the descriptor state: */
  904. if (!napi)
  905. spider_net_refill_rx_chain(card);
  906. out:
  907. return result;
  908. }
  909. /**
  910. * spider_net_poll - NAPI poll function called by the stack to return packets
  911. * @netdev: interface device structure
  912. * @budget: number of packets we can pass to the stack at most
  913. *
  914. * returns 0 if no more packets available to the driver/stack. Returns 1,
  915. * if the quota is exceeded, but the driver has still packets.
  916. *
  917. * spider_net_poll returns all packets from the rx descriptors to the stack
  918. * (using netif_receive_skb). If all/enough packets are up, the driver
  919. * reenables interrupts and returns 0. If not, 1 is returned.
  920. */
  921. static int
  922. spider_net_poll(struct net_device *netdev, int *budget)
  923. {
  924. struct spider_net_card *card = netdev_priv(netdev);
  925. int packets_to_do, packets_done = 0;
  926. int no_more_packets = 0;
  927. packets_to_do = min(*budget, netdev->quota);
  928. while (packets_to_do) {
  929. if (spider_net_decode_one_descr(card, 1)) {
  930. packets_done++;
  931. packets_to_do--;
  932. } else {
  933. /* no more packets for the stack */
  934. no_more_packets = 1;
  935. break;
  936. }
  937. }
  938. netdev->quota -= packets_done;
  939. *budget -= packets_done;
  940. spider_net_refill_rx_chain(card);
  941. /* if all packets are in the stack, enable interrupts and return 0 */
  942. /* if not, return 1 */
  943. if (no_more_packets) {
  944. netif_rx_complete(netdev);
  945. spider_net_rx_irq_on(card);
  946. return 0;
  947. }
  948. return 1;
  949. }
  950. /**
  951. * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
  952. * @netdev: interface device structure
  953. * @grp: vlan_group structure that is registered (NULL on destroying interface)
  954. */
  955. static void
  956. spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
  957. {
  958. /* further enhancement... yet to do */
  959. return;
  960. }
  961. /**
  962. * spider_net_vlan_rx_add - adds VLAN id to the card filter
  963. * @netdev: interface device structure
  964. * @vid: VLAN id to add
  965. */
  966. static void
  967. spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
  968. {
  969. /* further enhancement... yet to do */
  970. /* add vid to card's VLAN filter table */
  971. return;
  972. }
  973. /**
  974. * spider_net_vlan_rx_kill - removes VLAN id to the card filter
  975. * @netdev: interface device structure
  976. * @vid: VLAN id to remove
  977. */
  978. static void
  979. spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
  980. {
  981. /* further enhancement... yet to do */
  982. /* remove vid from card's VLAN filter table */
  983. }
  984. /**
  985. * spider_net_get_stats - get interface statistics
  986. * @netdev: interface device structure
  987. *
  988. * returns the interface statistics residing in the spider_net_card struct
  989. */
  990. static struct net_device_stats *
  991. spider_net_get_stats(struct net_device *netdev)
  992. {
  993. struct spider_net_card *card = netdev_priv(netdev);
  994. struct net_device_stats *stats = &card->netdev_stats;
  995. return stats;
  996. }
  997. /**
  998. * spider_net_change_mtu - changes the MTU of an interface
  999. * @netdev: interface device structure
  1000. * @new_mtu: new MTU value
  1001. *
  1002. * returns 0 on success, <0 on failure
  1003. */
  1004. static int
  1005. spider_net_change_mtu(struct net_device *netdev, int new_mtu)
  1006. {
  1007. /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
  1008. * and mtu is outbound only anyway */
  1009. if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
  1010. (new_mtu > SPIDER_NET_MAX_MTU) )
  1011. return -EINVAL;
  1012. netdev->mtu = new_mtu;
  1013. return 0;
  1014. }
  1015. /**
  1016. * spider_net_set_mac - sets the MAC of an interface
  1017. * @netdev: interface device structure
  1018. * @ptr: pointer to new MAC address
  1019. *
  1020. * Returns 0 on success, <0 on failure. Currently, we don't support this
  1021. * and will always return EOPNOTSUPP.
  1022. */
  1023. static int
  1024. spider_net_set_mac(struct net_device *netdev, void *p)
  1025. {
  1026. struct spider_net_card *card = netdev_priv(netdev);
  1027. u32 macl, macu, regvalue;
  1028. struct sockaddr *addr = p;
  1029. if (!is_valid_ether_addr(addr->sa_data))
  1030. return -EADDRNOTAVAIL;
  1031. /* switch off GMACTPE and GMACRPE */
  1032. regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
  1033. regvalue &= ~((1 << 5) | (1 << 6));
  1034. spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
  1035. /* write mac */
  1036. macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
  1037. (addr->sa_data[2]<<8) + (addr->sa_data[3]);
  1038. macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
  1039. spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
  1040. spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
  1041. /* switch GMACTPE and GMACRPE back on */
  1042. regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
  1043. regvalue |= ((1 << 5) | (1 << 6));
  1044. spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
  1045. spider_net_set_promisc(card);
  1046. /* look up, whether we have been successful */
  1047. if (spider_net_get_mac_address(netdev))
  1048. return -EADDRNOTAVAIL;
  1049. if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
  1050. return -EADDRNOTAVAIL;
  1051. return 0;
  1052. }
  1053. /**
  1054. * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt
  1055. * @card: card structure
  1056. *
  1057. * spider_net_handle_rxram_full empties the RX ring so that spider can put
  1058. * more packets in it and empty its RX RAM. This is called in bottom half
  1059. * context
  1060. */
  1061. static void
  1062. spider_net_handle_rxram_full(struct spider_net_card *card)
  1063. {
  1064. while (spider_net_decode_one_descr(card, 0))
  1065. ;
  1066. spider_net_enable_rxchtails(card);
  1067. spider_net_enable_rxdmac(card);
  1068. netif_rx_schedule(card->netdev);
  1069. }
  1070. /**
  1071. * spider_net_handle_error_irq - handles errors raised by an interrupt
  1072. * @card: card structure
  1073. * @status_reg: interrupt status register 0 (GHIINT0STS)
  1074. *
  1075. * spider_net_handle_error_irq treats or ignores all error conditions
  1076. * found when an interrupt is presented
  1077. */
  1078. static void
  1079. spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
  1080. {
  1081. u32 error_reg1, error_reg2;
  1082. u32 i;
  1083. int show_error = 1;
  1084. error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
  1085. error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
  1086. /* check GHIINT0STS ************************************/
  1087. if (status_reg)
  1088. for (i = 0; i < 32; i++)
  1089. if (status_reg & (1<<i))
  1090. switch (i)
  1091. {
  1092. /* let error_reg1 and error_reg2 evaluation decide, what to do
  1093. case SPIDER_NET_PHYINT:
  1094. case SPIDER_NET_GMAC2INT:
  1095. case SPIDER_NET_GMAC1INT:
  1096. case SPIDER_NET_GIPSINT:
  1097. case SPIDER_NET_GFIFOINT:
  1098. case SPIDER_NET_DMACINT:
  1099. case SPIDER_NET_GSYSINT:
  1100. break; */
  1101. case SPIDER_NET_GPWOPCMPINT:
  1102. /* PHY write operation completed */
  1103. show_error = 0;
  1104. break;
  1105. case SPIDER_NET_GPROPCMPINT:
  1106. /* PHY read operation completed */
  1107. /* we don't use semaphores, as we poll for the completion
  1108. * of the read operation in spider_net_read_phy. Should take
  1109. * about 50 us */
  1110. show_error = 0;
  1111. break;
  1112. case SPIDER_NET_GPWFFINT:
  1113. /* PHY command queue full */
  1114. if (netif_msg_intr(card))
  1115. pr_err("PHY write queue full\n");
  1116. show_error = 0;
  1117. break;
  1118. /* case SPIDER_NET_GRMDADRINT: not used. print a message */
  1119. /* case SPIDER_NET_GRMARPINT: not used. print a message */
  1120. /* case SPIDER_NET_GRMMPINT: not used. print a message */
  1121. case SPIDER_NET_GDTDEN0INT:
  1122. /* someone has set TX_DMA_EN to 0 */
  1123. show_error = 0;
  1124. break;
  1125. case SPIDER_NET_GDDDEN0INT: /* fallthrough */
  1126. case SPIDER_NET_GDCDEN0INT: /* fallthrough */
  1127. case SPIDER_NET_GDBDEN0INT: /* fallthrough */
  1128. case SPIDER_NET_GDADEN0INT:
  1129. /* someone has set RX_DMA_EN to 0 */
  1130. show_error = 0;
  1131. break;
  1132. /* RX interrupts */
  1133. case SPIDER_NET_GDDFDCINT:
  1134. case SPIDER_NET_GDCFDCINT:
  1135. case SPIDER_NET_GDBFDCINT:
  1136. case SPIDER_NET_GDAFDCINT:
  1137. /* case SPIDER_NET_GDNMINT: not used. print a message */
  1138. /* case SPIDER_NET_GCNMINT: not used. print a message */
  1139. /* case SPIDER_NET_GBNMINT: not used. print a message */
  1140. /* case SPIDER_NET_GANMINT: not used. print a message */
  1141. /* case SPIDER_NET_GRFNMINT: not used. print a message */
  1142. show_error = 0;
  1143. break;
  1144. /* TX interrupts */
  1145. case SPIDER_NET_GDTFDCINT:
  1146. show_error = 0;
  1147. break;
  1148. case SPIDER_NET_GTTEDINT:
  1149. show_error = 0;
  1150. break;
  1151. case SPIDER_NET_GDTDCEINT:
  1152. /* chain end. If a descriptor should be sent, kick off
  1153. * tx dma
  1154. if (card->tx_chain.tail == card->tx_chain.head)
  1155. spider_net_kick_tx_dma(card);
  1156. show_error = 0; */
  1157. break;
  1158. /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
  1159. /* case SPIDER_NET_GFREECNTINT: not used. print a message */
  1160. }
  1161. /* check GHIINT1STS ************************************/
  1162. if (error_reg1)
  1163. for (i = 0; i < 32; i++)
  1164. if (error_reg1 & (1<<i))
  1165. switch (i)
  1166. {
  1167. case SPIDER_NET_GTMFLLINT:
  1168. if (netif_msg_intr(card) && net_ratelimit())
  1169. pr_err("Spider TX RAM full\n");
  1170. show_error = 0;
  1171. break;
  1172. case SPIDER_NET_GRFDFLLINT: /* fallthrough */
  1173. case SPIDER_NET_GRFCFLLINT: /* fallthrough */
  1174. case SPIDER_NET_GRFBFLLINT: /* fallthrough */
  1175. case SPIDER_NET_GRFAFLLINT: /* fallthrough */
  1176. case SPIDER_NET_GRMFLLINT:
  1177. if (netif_msg_intr(card) && net_ratelimit())
  1178. pr_debug("Spider RX RAM full, incoming packets "
  1179. "might be discarded!\n");
  1180. spider_net_rx_irq_off(card);
  1181. tasklet_schedule(&card->rxram_full_tl);
  1182. show_error = 0;
  1183. break;
  1184. /* case SPIDER_NET_GTMSHTINT: problem, print a message */
  1185. case SPIDER_NET_GDTINVDINT:
  1186. /* allrighty. tx from previous descr ok */
  1187. show_error = 0;
  1188. break;
  1189. /* chain end */
  1190. case SPIDER_NET_GDDDCEINT: /* fallthrough */
  1191. case SPIDER_NET_GDCDCEINT: /* fallthrough */
  1192. case SPIDER_NET_GDBDCEINT: /* fallthrough */
  1193. case SPIDER_NET_GDADCEINT:
  1194. if (netif_msg_intr(card))
  1195. pr_err("got descriptor chain end interrupt, "
  1196. "restarting DMAC %c.\n",
  1197. 'D'-(i-SPIDER_NET_GDDDCEINT)/3);
  1198. spider_net_refill_rx_chain(card);
  1199. spider_net_enable_rxdmac(card);
  1200. show_error = 0;
  1201. break;
  1202. /* invalid descriptor */
  1203. case SPIDER_NET_GDDINVDINT: /* fallthrough */
  1204. case SPIDER_NET_GDCINVDINT: /* fallthrough */
  1205. case SPIDER_NET_GDBINVDINT: /* fallthrough */
  1206. case SPIDER_NET_GDAINVDINT:
  1207. /* could happen when rx chain is full */
  1208. spider_net_refill_rx_chain(card);
  1209. spider_net_enable_rxdmac(card);
  1210. show_error = 0;
  1211. break;
  1212. /* case SPIDER_NET_GDTRSERINT: problem, print a message */
  1213. /* case SPIDER_NET_GDDRSERINT: problem, print a message */
  1214. /* case SPIDER_NET_GDCRSERINT: problem, print a message */
  1215. /* case SPIDER_NET_GDBRSERINT: problem, print a message */
  1216. /* case SPIDER_NET_GDARSERINT: problem, print a message */
  1217. /* case SPIDER_NET_GDSERINT: problem, print a message */
  1218. /* case SPIDER_NET_GDTPTERINT: problem, print a message */
  1219. /* case SPIDER_NET_GDDPTERINT: problem, print a message */
  1220. /* case SPIDER_NET_GDCPTERINT: problem, print a message */
  1221. /* case SPIDER_NET_GDBPTERINT: problem, print a message */
  1222. /* case SPIDER_NET_GDAPTERINT: problem, print a message */
  1223. default:
  1224. show_error = 1;
  1225. break;
  1226. }
  1227. /* check GHIINT2STS ************************************/
  1228. if (error_reg2)
  1229. for (i = 0; i < 32; i++)
  1230. if (error_reg2 & (1<<i))
  1231. switch (i)
  1232. {
  1233. /* there is nothing we can (want to) do at this time. Log a
  1234. * message, we can switch on and off the specific values later on
  1235. case SPIDER_NET_GPROPERINT:
  1236. case SPIDER_NET_GMCTCRSNGINT:
  1237. case SPIDER_NET_GMCTLCOLINT:
  1238. case SPIDER_NET_GMCTTMOTINT:
  1239. case SPIDER_NET_GMCRCAERINT:
  1240. case SPIDER_NET_GMCRCALERINT:
  1241. case SPIDER_NET_GMCRALNERINT:
  1242. case SPIDER_NET_GMCROVRINT:
  1243. case SPIDER_NET_GMCRRNTINT:
  1244. case SPIDER_NET_GMCRRXERINT:
  1245. case SPIDER_NET_GTITCSERINT:
  1246. case SPIDER_NET_GTIFMTERINT:
  1247. case SPIDER_NET_GTIPKTRVKINT:
  1248. case SPIDER_NET_GTISPINGINT:
  1249. case SPIDER_NET_GTISADNGINT:
  1250. case SPIDER_NET_GTISPDNGINT:
  1251. case SPIDER_NET_GRIFMTERINT:
  1252. case SPIDER_NET_GRIPKTRVKINT:
  1253. case SPIDER_NET_GRISPINGINT:
  1254. case SPIDER_NET_GRISADNGINT:
  1255. case SPIDER_NET_GRISPDNGINT:
  1256. break;
  1257. */
  1258. default:
  1259. break;
  1260. }
  1261. if ((show_error) && (netif_msg_intr(card)))
  1262. pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
  1263. "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
  1264. status_reg, error_reg1, error_reg2);
  1265. /* clear interrupt sources */
  1266. spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
  1267. spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
  1268. }
  1269. /**
  1270. * spider_net_interrupt - interrupt handler for spider_net
  1271. * @irq: interupt number
  1272. * @ptr: pointer to net_device
  1273. * @regs: PU registers
  1274. *
  1275. * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
  1276. * interrupt found raised by card.
  1277. *
  1278. * This is the interrupt handler, that turns off
  1279. * interrupts for this device and makes the stack poll the driver
  1280. */
  1281. static irqreturn_t
  1282. spider_net_interrupt(int irq, void *ptr)
  1283. {
  1284. struct net_device *netdev = ptr;
  1285. struct spider_net_card *card = netdev_priv(netdev);
  1286. u32 status_reg;
  1287. status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
  1288. if (!status_reg)
  1289. return IRQ_NONE;
  1290. if (status_reg & SPIDER_NET_RXINT ) {
  1291. spider_net_rx_irq_off(card);
  1292. netif_rx_schedule(netdev);
  1293. }
  1294. if (status_reg & SPIDER_NET_ERRINT )
  1295. spider_net_handle_error_irq(card, status_reg);
  1296. /* clear interrupt sources */
  1297. spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
  1298. return IRQ_HANDLED;
  1299. }
  1300. #ifdef CONFIG_NET_POLL_CONTROLLER
  1301. /**
  1302. * spider_net_poll_controller - artificial interrupt for netconsole etc.
  1303. * @netdev: interface device structure
  1304. *
  1305. * see Documentation/networking/netconsole.txt
  1306. */
  1307. static void
  1308. spider_net_poll_controller(struct net_device *netdev)
  1309. {
  1310. disable_irq(netdev->irq);
  1311. spider_net_interrupt(netdev->irq, netdev);
  1312. enable_irq(netdev->irq);
  1313. }
  1314. #endif /* CONFIG_NET_POLL_CONTROLLER */
  1315. /**
  1316. * spider_net_init_card - initializes the card
  1317. * @card: card structure
  1318. *
  1319. * spider_net_init_card initializes the card so that other registers can
  1320. * be used
  1321. */
  1322. static void
  1323. spider_net_init_card(struct spider_net_card *card)
  1324. {
  1325. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  1326. SPIDER_NET_CKRCTRL_STOP_VALUE);
  1327. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  1328. SPIDER_NET_CKRCTRL_RUN_VALUE);
  1329. }
  1330. /**
  1331. * spider_net_enable_card - enables the card by setting all kinds of regs
  1332. * @card: card structure
  1333. *
  1334. * spider_net_enable_card sets a lot of SMMIO registers to enable the device
  1335. */
  1336. static void
  1337. spider_net_enable_card(struct spider_net_card *card)
  1338. {
  1339. int i;
  1340. /* the following array consists of (register),(value) pairs
  1341. * that are set in this function. A register of 0 ends the list */
  1342. u32 regs[][2] = {
  1343. { SPIDER_NET_GRESUMINTNUM, 0 },
  1344. { SPIDER_NET_GREINTNUM, 0 },
  1345. /* set interrupt frame number registers */
  1346. /* clear the single DMA engine registers first */
  1347. { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
  1348. { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
  1349. { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
  1350. { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
  1351. /* then set, what we really need */
  1352. { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
  1353. /* timer counter registers and stuff */
  1354. { SPIDER_NET_GFREECNNUM, 0 },
  1355. { SPIDER_NET_GONETIMENUM, 0 },
  1356. { SPIDER_NET_GTOUTFRMNUM, 0 },
  1357. /* RX mode setting */
  1358. { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
  1359. /* TX mode setting */
  1360. { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
  1361. /* IPSEC mode setting */
  1362. { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
  1363. { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
  1364. { SPIDER_NET_GMRWOLCTRL, 0 },
  1365. { SPIDER_NET_GTESTMD, 0x10000000 },
  1366. { SPIDER_NET_GTTQMSK, 0x00400040 },
  1367. { SPIDER_NET_GMACINTEN, 0 },
  1368. /* flow control stuff */
  1369. { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
  1370. { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
  1371. { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
  1372. { 0, 0}
  1373. };
  1374. i = 0;
  1375. while (regs[i][0]) {
  1376. spider_net_write_reg(card, regs[i][0], regs[i][1]);
  1377. i++;
  1378. }
  1379. /* clear unicast filter table entries 1 to 14 */
  1380. for (i = 1; i <= 14; i++) {
  1381. spider_net_write_reg(card,
  1382. SPIDER_NET_GMRUAFILnR + i * 8,
  1383. 0x00080000);
  1384. spider_net_write_reg(card,
  1385. SPIDER_NET_GMRUAFILnR + i * 8 + 4,
  1386. 0x00000000);
  1387. }
  1388. spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
  1389. spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
  1390. /* set chain tail adress for RX chains and
  1391. * enable DMA */
  1392. spider_net_enable_rxchtails(card);
  1393. spider_net_enable_rxdmac(card);
  1394. spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
  1395. spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
  1396. SPIDER_NET_LENLMT_VALUE);
  1397. spider_net_write_reg(card, SPIDER_NET_GMACMODE,
  1398. SPIDER_NET_MACMODE_VALUE);
  1399. spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
  1400. SPIDER_NET_OPMODE_VALUE);
  1401. /* set interrupt mask registers */
  1402. spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
  1403. SPIDER_NET_INT0_MASK_VALUE);
  1404. spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
  1405. SPIDER_NET_INT1_MASK_VALUE);
  1406. spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
  1407. SPIDER_NET_INT2_MASK_VALUE);
  1408. spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
  1409. SPIDER_NET_GDTBSTA | SPIDER_NET_GDTDCEIDIS);
  1410. }
  1411. /**
  1412. * spider_net_open - called upon ifonfig up
  1413. * @netdev: interface device structure
  1414. *
  1415. * returns 0 on success, <0 on failure
  1416. *
  1417. * spider_net_open allocates all the descriptors and memory needed for
  1418. * operation, sets up multicast list and enables interrupts
  1419. */
  1420. int
  1421. spider_net_open(struct net_device *netdev)
  1422. {
  1423. struct spider_net_card *card = netdev_priv(netdev);
  1424. int result;
  1425. result = -ENOMEM;
  1426. if (spider_net_init_chain(card, &card->tx_chain, card->descr,
  1427. PCI_DMA_TODEVICE, card->tx_desc))
  1428. goto alloc_tx_failed;
  1429. if (spider_net_init_chain(card, &card->rx_chain,
  1430. card->descr + card->rx_desc,
  1431. PCI_DMA_FROMDEVICE, card->rx_desc))
  1432. goto alloc_rx_failed;
  1433. /* allocate rx skbs */
  1434. if (spider_net_alloc_rx_skbs(card))
  1435. goto alloc_skbs_failed;
  1436. spider_net_set_multi(netdev);
  1437. /* further enhancement: setup hw vlan, if needed */
  1438. result = -EBUSY;
  1439. if (request_irq(netdev->irq, spider_net_interrupt,
  1440. IRQF_SHARED, netdev->name, netdev))
  1441. goto register_int_failed;
  1442. spider_net_enable_card(card);
  1443. netif_start_queue(netdev);
  1444. netif_carrier_on(netdev);
  1445. netif_poll_enable(netdev);
  1446. return 0;
  1447. register_int_failed:
  1448. spider_net_free_rx_chain_contents(card);
  1449. alloc_skbs_failed:
  1450. spider_net_free_chain(card, &card->rx_chain);
  1451. alloc_rx_failed:
  1452. spider_net_free_chain(card, &card->tx_chain);
  1453. alloc_tx_failed:
  1454. return result;
  1455. }
  1456. /**
  1457. * spider_net_setup_phy - setup PHY
  1458. * @card: card structure
  1459. *
  1460. * returns 0 on success, <0 on failure
  1461. *
  1462. * spider_net_setup_phy is used as part of spider_net_probe. Sets
  1463. * the PHY to 1000 Mbps
  1464. **/
  1465. static int
  1466. spider_net_setup_phy(struct spider_net_card *card)
  1467. {
  1468. struct mii_phy *phy = &card->phy;
  1469. spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
  1470. SPIDER_NET_DMASEL_VALUE);
  1471. spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
  1472. SPIDER_NET_PHY_CTRL_VALUE);
  1473. phy->mii_id = 1;
  1474. phy->dev = card->netdev;
  1475. phy->mdio_read = spider_net_read_phy;
  1476. phy->mdio_write = spider_net_write_phy;
  1477. mii_phy_probe(phy, phy->mii_id);
  1478. if (phy->def->ops->setup_forced)
  1479. phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
  1480. phy->def->ops->enable_fiber(phy);
  1481. phy->def->ops->read_link(phy);
  1482. pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
  1483. phy->speed, phy->duplex==1 ? "Full" : "Half");
  1484. return 0;
  1485. }
  1486. /**
  1487. * spider_net_download_firmware - loads firmware into the adapter
  1488. * @card: card structure
  1489. * @firmware_ptr: pointer to firmware data
  1490. *
  1491. * spider_net_download_firmware loads the firmware data into the
  1492. * adapter. It assumes the length etc. to be allright.
  1493. */
  1494. static int
  1495. spider_net_download_firmware(struct spider_net_card *card,
  1496. const void *firmware_ptr)
  1497. {
  1498. int sequencer, i;
  1499. const u32 *fw_ptr = firmware_ptr;
  1500. /* stop sequencers */
  1501. spider_net_write_reg(card, SPIDER_NET_GSINIT,
  1502. SPIDER_NET_STOP_SEQ_VALUE);
  1503. for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
  1504. sequencer++) {
  1505. spider_net_write_reg(card,
  1506. SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
  1507. for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
  1508. spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
  1509. sequencer * 8, *fw_ptr);
  1510. fw_ptr++;
  1511. }
  1512. }
  1513. if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
  1514. return -EIO;
  1515. spider_net_write_reg(card, SPIDER_NET_GSINIT,
  1516. SPIDER_NET_RUN_SEQ_VALUE);
  1517. return 0;
  1518. }
  1519. /**
  1520. * spider_net_init_firmware - reads in firmware parts
  1521. * @card: card structure
  1522. *
  1523. * Returns 0 on success, <0 on failure
  1524. *
  1525. * spider_net_init_firmware opens the sequencer firmware and does some basic
  1526. * checks. This function opens and releases the firmware structure. A call
  1527. * to download the firmware is performed before the release.
  1528. *
  1529. * Firmware format
  1530. * ===============
  1531. * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
  1532. * the program for each sequencer. Use the command
  1533. * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
  1534. * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
  1535. * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
  1536. *
  1537. * to generate spider_fw.bin, if you have sequencer programs with something
  1538. * like the following contents for each sequencer:
  1539. * <ONE LINE COMMENT>
  1540. * <FIRST 4-BYTES-WORD FOR SEQUENCER>
  1541. * <SECOND 4-BYTES-WORD FOR SEQUENCER>
  1542. * ...
  1543. * <1024th 4-BYTES-WORD FOR SEQUENCER>
  1544. */
  1545. static int
  1546. spider_net_init_firmware(struct spider_net_card *card)
  1547. {
  1548. struct firmware *firmware = NULL;
  1549. struct device_node *dn;
  1550. const u8 *fw_prop = NULL;
  1551. int err = -ENOENT;
  1552. int fw_size;
  1553. if (request_firmware((const struct firmware **)&firmware,
  1554. SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
  1555. if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
  1556. netif_msg_probe(card) ) {
  1557. pr_err("Incorrect size of spidernet firmware in " \
  1558. "filesystem. Looking in host firmware...\n");
  1559. goto try_host_fw;
  1560. }
  1561. err = spider_net_download_firmware(card, firmware->data);
  1562. release_firmware(firmware);
  1563. if (err)
  1564. goto try_host_fw;
  1565. goto done;
  1566. }
  1567. try_host_fw:
  1568. dn = pci_device_to_OF_node(card->pdev);
  1569. if (!dn)
  1570. goto out_err;
  1571. fw_prop = get_property(dn, "firmware", &fw_size);
  1572. if (!fw_prop)
  1573. goto out_err;
  1574. if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
  1575. netif_msg_probe(card) ) {
  1576. pr_err("Incorrect size of spidernet firmware in " \
  1577. "host firmware\n");
  1578. goto done;
  1579. }
  1580. err = spider_net_download_firmware(card, fw_prop);
  1581. done:
  1582. return err;
  1583. out_err:
  1584. if (netif_msg_probe(card))
  1585. pr_err("Couldn't find spidernet firmware in filesystem " \
  1586. "or host firmware\n");
  1587. return err;
  1588. }
  1589. /**
  1590. * spider_net_workaround_rxramfull - work around firmware bug
  1591. * @card: card structure
  1592. *
  1593. * no return value
  1594. **/
  1595. static void
  1596. spider_net_workaround_rxramfull(struct spider_net_card *card)
  1597. {
  1598. int i, sequencer = 0;
  1599. /* cancel reset */
  1600. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  1601. SPIDER_NET_CKRCTRL_RUN_VALUE);
  1602. /* empty sequencer data */
  1603. for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
  1604. sequencer++) {
  1605. spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
  1606. sequencer * 8, 0x0);
  1607. for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
  1608. spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
  1609. sequencer * 8, 0x0);
  1610. }
  1611. }
  1612. /* set sequencer operation */
  1613. spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
  1614. /* reset */
  1615. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  1616. SPIDER_NET_CKRCTRL_STOP_VALUE);
  1617. }
  1618. /**
  1619. * spider_net_stop - called upon ifconfig down
  1620. * @netdev: interface device structure
  1621. *
  1622. * always returns 0
  1623. */
  1624. int
  1625. spider_net_stop(struct net_device *netdev)
  1626. {
  1627. struct spider_net_card *card = netdev_priv(netdev);
  1628. tasklet_kill(&card->rxram_full_tl);
  1629. netif_poll_disable(netdev);
  1630. netif_carrier_off(netdev);
  1631. netif_stop_queue(netdev);
  1632. del_timer_sync(&card->tx_timer);
  1633. /* disable/mask all interrupts */
  1634. spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
  1635. spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
  1636. spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
  1637. /* free_irq(netdev->irq, netdev);*/
  1638. free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
  1639. spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
  1640. SPIDER_NET_DMA_TX_FEND_VALUE);
  1641. /* turn off DMA, force end */
  1642. spider_net_disable_rxdmac(card);
  1643. /* release chains */
  1644. if (spin_trylock(&card->tx_chain.lock)) {
  1645. spider_net_release_tx_chain(card, 1);
  1646. spin_unlock(&card->tx_chain.lock);
  1647. }
  1648. spider_net_free_chain(card, &card->tx_chain);
  1649. spider_net_free_chain(card, &card->rx_chain);
  1650. return 0;
  1651. }
  1652. /**
  1653. * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
  1654. * function (to be called not under interrupt status)
  1655. * @data: data, is interface device structure
  1656. *
  1657. * called as task when tx hangs, resets interface (if interface is up)
  1658. */
  1659. static void
  1660. spider_net_tx_timeout_task(void *data)
  1661. {
  1662. struct net_device *netdev = data;
  1663. struct spider_net_card *card = netdev_priv(netdev);
  1664. if (!(netdev->flags & IFF_UP))
  1665. goto out;
  1666. netif_device_detach(netdev);
  1667. spider_net_stop(netdev);
  1668. spider_net_workaround_rxramfull(card);
  1669. spider_net_init_card(card);
  1670. if (spider_net_setup_phy(card))
  1671. goto out;
  1672. if (spider_net_init_firmware(card))
  1673. goto out;
  1674. spider_net_open(netdev);
  1675. spider_net_kick_tx_dma(card);
  1676. netif_device_attach(netdev);
  1677. out:
  1678. atomic_dec(&card->tx_timeout_task_counter);
  1679. }
  1680. /**
  1681. * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
  1682. * @netdev: interface device structure
  1683. *
  1684. * called, if tx hangs. Schedules a task that resets the interface
  1685. */
  1686. static void
  1687. spider_net_tx_timeout(struct net_device *netdev)
  1688. {
  1689. struct spider_net_card *card;
  1690. card = netdev_priv(netdev);
  1691. atomic_inc(&card->tx_timeout_task_counter);
  1692. if (netdev->flags & IFF_UP)
  1693. schedule_work(&card->tx_timeout_task);
  1694. else
  1695. atomic_dec(&card->tx_timeout_task_counter);
  1696. card->spider_stats.tx_timeouts++;
  1697. }
  1698. /**
  1699. * spider_net_setup_netdev_ops - initialization of net_device operations
  1700. * @netdev: net_device structure
  1701. *
  1702. * fills out function pointers in the net_device structure
  1703. */
  1704. static void
  1705. spider_net_setup_netdev_ops(struct net_device *netdev)
  1706. {
  1707. netdev->open = &spider_net_open;
  1708. netdev->stop = &spider_net_stop;
  1709. netdev->hard_start_xmit = &spider_net_xmit;
  1710. netdev->get_stats = &spider_net_get_stats;
  1711. netdev->set_multicast_list = &spider_net_set_multi;
  1712. netdev->set_mac_address = &spider_net_set_mac;
  1713. netdev->change_mtu = &spider_net_change_mtu;
  1714. netdev->do_ioctl = &spider_net_do_ioctl;
  1715. /* tx watchdog */
  1716. netdev->tx_timeout = &spider_net_tx_timeout;
  1717. netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
  1718. /* NAPI */
  1719. netdev->poll = &spider_net_poll;
  1720. netdev->weight = SPIDER_NET_NAPI_WEIGHT;
  1721. /* HW VLAN */
  1722. netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
  1723. netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
  1724. netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
  1725. #ifdef CONFIG_NET_POLL_CONTROLLER
  1726. /* poll controller */
  1727. netdev->poll_controller = &spider_net_poll_controller;
  1728. #endif /* CONFIG_NET_POLL_CONTROLLER */
  1729. /* ethtool ops */
  1730. netdev->ethtool_ops = &spider_net_ethtool_ops;
  1731. }
  1732. /**
  1733. * spider_net_setup_netdev - initialization of net_device
  1734. * @card: card structure
  1735. *
  1736. * Returns 0 on success or <0 on failure
  1737. *
  1738. * spider_net_setup_netdev initializes the net_device structure
  1739. **/
  1740. static int
  1741. spider_net_setup_netdev(struct spider_net_card *card)
  1742. {
  1743. int result;
  1744. struct net_device *netdev = card->netdev;
  1745. struct device_node *dn;
  1746. struct sockaddr addr;
  1747. const u8 *mac;
  1748. SET_MODULE_OWNER(netdev);
  1749. SET_NETDEV_DEV(netdev, &card->pdev->dev);
  1750. pci_set_drvdata(card->pdev, netdev);
  1751. card->rxram_full_tl.data = (unsigned long) card;
  1752. card->rxram_full_tl.func =
  1753. (void (*)(unsigned long)) spider_net_handle_rxram_full;
  1754. init_timer(&card->tx_timer);
  1755. card->tx_timer.function =
  1756. (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
  1757. card->tx_timer.data = (unsigned long) card;
  1758. netdev->irq = card->pdev->irq;
  1759. card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
  1760. card->tx_desc = tx_descriptors;
  1761. card->rx_desc = rx_descriptors;
  1762. spider_net_setup_netdev_ops(netdev);
  1763. netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
  1764. /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
  1765. * NETIF_F_HW_VLAN_FILTER */
  1766. netdev->irq = card->pdev->irq;
  1767. dn = pci_device_to_OF_node(card->pdev);
  1768. if (!dn)
  1769. return -EIO;
  1770. mac = get_property(dn, "local-mac-address", NULL);
  1771. if (!mac)
  1772. return -EIO;
  1773. memcpy(addr.sa_data, mac, ETH_ALEN);
  1774. result = spider_net_set_mac(netdev, &addr);
  1775. if ((result) && (netif_msg_probe(card)))
  1776. pr_err("Failed to set MAC address: %i\n", result);
  1777. result = register_netdev(netdev);
  1778. if (result) {
  1779. if (netif_msg_probe(card))
  1780. pr_err("Couldn't register net_device: %i\n",
  1781. result);
  1782. return result;
  1783. }
  1784. if (netif_msg_probe(card))
  1785. pr_info("Initialized device %s.\n", netdev->name);
  1786. return 0;
  1787. }
  1788. /**
  1789. * spider_net_alloc_card - allocates net_device and card structure
  1790. *
  1791. * returns the card structure or NULL in case of errors
  1792. *
  1793. * the card and net_device structures are linked to each other
  1794. */
  1795. static struct spider_net_card *
  1796. spider_net_alloc_card(void)
  1797. {
  1798. struct net_device *netdev;
  1799. struct spider_net_card *card;
  1800. size_t alloc_size;
  1801. alloc_size = sizeof (*card) +
  1802. sizeof (struct spider_net_descr) * rx_descriptors +
  1803. sizeof (struct spider_net_descr) * tx_descriptors;
  1804. netdev = alloc_etherdev(alloc_size);
  1805. if (!netdev)
  1806. return NULL;
  1807. card = netdev_priv(netdev);
  1808. card->netdev = netdev;
  1809. card->msg_enable = SPIDER_NET_DEFAULT_MSG;
  1810. INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev);
  1811. init_waitqueue_head(&card->waitq);
  1812. atomic_set(&card->tx_timeout_task_counter, 0);
  1813. return card;
  1814. }
  1815. /**
  1816. * spider_net_undo_pci_setup - releases PCI ressources
  1817. * @card: card structure
  1818. *
  1819. * spider_net_undo_pci_setup releases the mapped regions
  1820. */
  1821. static void
  1822. spider_net_undo_pci_setup(struct spider_net_card *card)
  1823. {
  1824. iounmap(card->regs);
  1825. pci_release_regions(card->pdev);
  1826. }
  1827. /**
  1828. * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
  1829. * @card: card structure
  1830. * @pdev: PCI device
  1831. *
  1832. * Returns the card structure or NULL if any errors occur
  1833. *
  1834. * spider_net_setup_pci_dev initializes pdev and together with the
  1835. * functions called in spider_net_open configures the device so that
  1836. * data can be transferred over it
  1837. * The net_device structure is attached to the card structure, if the
  1838. * function returns without error.
  1839. **/
  1840. static struct spider_net_card *
  1841. spider_net_setup_pci_dev(struct pci_dev *pdev)
  1842. {
  1843. struct spider_net_card *card;
  1844. unsigned long mmio_start, mmio_len;
  1845. if (pci_enable_device(pdev)) {
  1846. pr_err("Couldn't enable PCI device\n");
  1847. return NULL;
  1848. }
  1849. if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
  1850. pr_err("Couldn't find proper PCI device base address.\n");
  1851. goto out_disable_dev;
  1852. }
  1853. if (pci_request_regions(pdev, spider_net_driver_name)) {
  1854. pr_err("Couldn't obtain PCI resources, aborting.\n");
  1855. goto out_disable_dev;
  1856. }
  1857. pci_set_master(pdev);
  1858. card = spider_net_alloc_card();
  1859. if (!card) {
  1860. pr_err("Couldn't allocate net_device structure, "
  1861. "aborting.\n");
  1862. goto out_release_regions;
  1863. }
  1864. card->pdev = pdev;
  1865. /* fetch base address and length of first resource */
  1866. mmio_start = pci_resource_start(pdev, 0);
  1867. mmio_len = pci_resource_len(pdev, 0);
  1868. card->netdev->mem_start = mmio_start;
  1869. card->netdev->mem_end = mmio_start + mmio_len;
  1870. card->regs = ioremap(mmio_start, mmio_len);
  1871. if (!card->regs) {
  1872. pr_err("Couldn't obtain PCI resources, aborting.\n");
  1873. goto out_release_regions;
  1874. }
  1875. return card;
  1876. out_release_regions:
  1877. pci_release_regions(pdev);
  1878. out_disable_dev:
  1879. pci_disable_device(pdev);
  1880. pci_set_drvdata(pdev, NULL);
  1881. return NULL;
  1882. }
  1883. /**
  1884. * spider_net_probe - initialization of a device
  1885. * @pdev: PCI device
  1886. * @ent: entry in the device id list
  1887. *
  1888. * Returns 0 on success, <0 on failure
  1889. *
  1890. * spider_net_probe initializes pdev and registers a net_device
  1891. * structure for it. After that, the device can be ifconfig'ed up
  1892. **/
  1893. static int __devinit
  1894. spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  1895. {
  1896. int err = -EIO;
  1897. struct spider_net_card *card;
  1898. card = spider_net_setup_pci_dev(pdev);
  1899. if (!card)
  1900. goto out;
  1901. spider_net_workaround_rxramfull(card);
  1902. spider_net_init_card(card);
  1903. err = spider_net_setup_phy(card);
  1904. if (err)
  1905. goto out_undo_pci;
  1906. err = spider_net_init_firmware(card);
  1907. if (err)
  1908. goto out_undo_pci;
  1909. err = spider_net_setup_netdev(card);
  1910. if (err)
  1911. goto out_undo_pci;
  1912. return 0;
  1913. out_undo_pci:
  1914. spider_net_undo_pci_setup(card);
  1915. free_netdev(card->netdev);
  1916. out:
  1917. return err;
  1918. }
  1919. /**
  1920. * spider_net_remove - removal of a device
  1921. * @pdev: PCI device
  1922. *
  1923. * Returns 0 on success, <0 on failure
  1924. *
  1925. * spider_net_remove is called to remove the device and unregisters the
  1926. * net_device
  1927. **/
  1928. static void __devexit
  1929. spider_net_remove(struct pci_dev *pdev)
  1930. {
  1931. struct net_device *netdev;
  1932. struct spider_net_card *card;
  1933. netdev = pci_get_drvdata(pdev);
  1934. card = netdev_priv(netdev);
  1935. wait_event(card->waitq,
  1936. atomic_read(&card->tx_timeout_task_counter) == 0);
  1937. unregister_netdev(netdev);
  1938. /* switch off card */
  1939. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  1940. SPIDER_NET_CKRCTRL_STOP_VALUE);
  1941. spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
  1942. SPIDER_NET_CKRCTRL_RUN_VALUE);
  1943. spider_net_undo_pci_setup(card);
  1944. free_netdev(netdev);
  1945. }
  1946. static struct pci_driver spider_net_driver = {
  1947. .name = spider_net_driver_name,
  1948. .id_table = spider_net_pci_tbl,
  1949. .probe = spider_net_probe,
  1950. .remove = __devexit_p(spider_net_remove)
  1951. };
  1952. /**
  1953. * spider_net_init - init function when the driver is loaded
  1954. *
  1955. * spider_net_init registers the device driver
  1956. */
  1957. static int __init spider_net_init(void)
  1958. {
  1959. printk(KERN_INFO "Spidernet version %s.\n", VERSION);
  1960. if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
  1961. rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
  1962. pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
  1963. }
  1964. if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
  1965. rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
  1966. pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
  1967. }
  1968. if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
  1969. tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
  1970. pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
  1971. }
  1972. if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
  1973. tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
  1974. pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
  1975. }
  1976. return pci_register_driver(&spider_net_driver);
  1977. }
  1978. /**
  1979. * spider_net_cleanup - exit function when driver is unloaded
  1980. *
  1981. * spider_net_cleanup unregisters the device driver
  1982. */
  1983. static void __exit spider_net_cleanup(void)
  1984. {
  1985. pci_unregister_driver(&spider_net_driver);
  1986. }
  1987. module_init(spider_net_init);
  1988. module_exit(spider_net_cleanup);