netxen_nic_main.c 37 KB

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  1. /*
  2. * Copyright (C) 2003 - 2006 NetXen, Inc.
  3. * All rights reserved.
  4. *
  5. * This program is free software; you can redistribute it and/or
  6. * modify it under the terms of the GNU General Public License
  7. * as published by the Free Software Foundation; either version 2
  8. * of the License, or (at your option) any later version.
  9. *
  10. * This program is distributed in the hope that it will be useful, but
  11. * WITHOUT ANY WARRANTY; without even the implied warranty of
  12. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13. * GNU General Public License for more details.
  14. *
  15. * You should have received a copy of the GNU General Public License
  16. * along with this program; if not, write to the Free Software
  17. * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  18. * MA 02111-1307, USA.
  19. *
  20. * The full GNU General Public License is included in this distribution
  21. * in the file called LICENSE.
  22. *
  23. * Contact Information:
  24. * info@netxen.com
  25. * NetXen,
  26. * 3965 Freedom Circle, Fourth floor,
  27. * Santa Clara, CA 95054
  28. *
  29. *
  30. * Main source file for NetXen NIC Driver on Linux
  31. *
  32. */
  33. #include <linux/vmalloc.h>
  34. #include <linux/highmem.h>
  35. #include "netxen_nic_hw.h"
  36. #include "netxen_nic.h"
  37. #include "netxen_nic_phan_reg.h"
  38. #include <linux/dma-mapping.h>
  39. #include <net/ip.h>
  40. MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
  41. MODULE_LICENSE("GPL");
  42. MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
  43. char netxen_nic_driver_name[] = "netxen_nic";
  44. static char netxen_nic_driver_string[] = "NetXen Network Driver version "
  45. NETXEN_NIC_LINUX_VERSIONID;
  46. #define NETXEN_NETDEV_WEIGHT 120
  47. #define NETXEN_ADAPTER_UP_MAGIC 777
  48. #define NETXEN_NIC_PEG_TUNE 0
  49. /* Local functions to NetXen NIC driver */
  50. static int __devinit netxen_nic_probe(struct pci_dev *pdev,
  51. const struct pci_device_id *ent);
  52. static void __devexit netxen_nic_remove(struct pci_dev *pdev);
  53. static int netxen_nic_open(struct net_device *netdev);
  54. static int netxen_nic_close(struct net_device *netdev);
  55. static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
  56. static void netxen_tx_timeout(struct net_device *netdev);
  57. static void netxen_tx_timeout_task(struct work_struct *work);
  58. static void netxen_watchdog(unsigned long);
  59. static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
  60. static int netxen_nic_poll(struct napi_struct *napi, int budget);
  61. #ifdef CONFIG_NET_POLL_CONTROLLER
  62. static void netxen_nic_poll_controller(struct net_device *netdev);
  63. #endif
  64. static irqreturn_t netxen_intr(int irq, void *data);
  65. int physical_port[] = {0, 1, 2, 3};
  66. /* PCI Device ID Table */
  67. static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
  68. {PCI_DEVICE(0x4040, 0x0001)},
  69. {PCI_DEVICE(0x4040, 0x0002)},
  70. {PCI_DEVICE(0x4040, 0x0003)},
  71. {PCI_DEVICE(0x4040, 0x0004)},
  72. {PCI_DEVICE(0x4040, 0x0005)},
  73. {PCI_DEVICE(0x4040, 0x0024)},
  74. {PCI_DEVICE(0x4040, 0x0025)},
  75. {0,}
  76. };
  77. MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
  78. struct workqueue_struct *netxen_workq;
  79. static void netxen_watchdog(unsigned long);
  80. static void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
  81. uint32_t crb_producer)
  82. {
  83. switch (adapter->portnum) {
  84. case 0:
  85. writel(crb_producer, NETXEN_CRB_NORMALIZE
  86. (adapter, CRB_CMD_PRODUCER_OFFSET));
  87. return;
  88. case 1:
  89. writel(crb_producer, NETXEN_CRB_NORMALIZE
  90. (adapter, CRB_CMD_PRODUCER_OFFSET_1));
  91. return;
  92. case 2:
  93. writel(crb_producer, NETXEN_CRB_NORMALIZE
  94. (adapter, CRB_CMD_PRODUCER_OFFSET_2));
  95. return;
  96. case 3:
  97. writel(crb_producer, NETXEN_CRB_NORMALIZE
  98. (adapter, CRB_CMD_PRODUCER_OFFSET_3));
  99. return;
  100. default:
  101. printk(KERN_WARNING "We tried to update "
  102. "CRB_CMD_PRODUCER_OFFSET for invalid "
  103. "PCI function id %d\n",
  104. adapter->portnum);
  105. return;
  106. }
  107. }
  108. static void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
  109. u32 crb_consumer)
  110. {
  111. switch (adapter->portnum) {
  112. case 0:
  113. writel(crb_consumer, NETXEN_CRB_NORMALIZE
  114. (adapter, CRB_CMD_CONSUMER_OFFSET));
  115. return;
  116. case 1:
  117. writel(crb_consumer, NETXEN_CRB_NORMALIZE
  118. (adapter, CRB_CMD_CONSUMER_OFFSET_1));
  119. return;
  120. case 2:
  121. writel(crb_consumer, NETXEN_CRB_NORMALIZE
  122. (adapter, CRB_CMD_CONSUMER_OFFSET_2));
  123. return;
  124. case 3:
  125. writel(crb_consumer, NETXEN_CRB_NORMALIZE
  126. (adapter, CRB_CMD_CONSUMER_OFFSET_3));
  127. return;
  128. default:
  129. printk(KERN_WARNING "We tried to update "
  130. "CRB_CMD_PRODUCER_OFFSET for invalid "
  131. "PCI function id %d\n",
  132. adapter->portnum);
  133. return;
  134. }
  135. }
  136. #define ADAPTER_LIST_SIZE 12
  137. static uint32_t msi_tgt_status[4] = {
  138. ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
  139. ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3
  140. };
  141. static uint32_t sw_int_mask[4] = {
  142. CRB_SW_INT_MASK_0, CRB_SW_INT_MASK_1,
  143. CRB_SW_INT_MASK_2, CRB_SW_INT_MASK_3
  144. };
  145. static void netxen_nic_disable_int(struct netxen_adapter *adapter)
  146. {
  147. u32 mask = 0x7ff;
  148. int retries = 32;
  149. int port = adapter->portnum;
  150. int pci_fn = adapter->ahw.pci_func;
  151. if (adapter->msi_mode != MSI_MODE_MULTIFUNC) {
  152. writel(0x0, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
  153. }
  154. if (adapter->intr_scheme != -1 &&
  155. adapter->intr_scheme != INTR_SCHEME_PERPORT)
  156. writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
  157. if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
  158. do {
  159. writel(0xffffffff,
  160. PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
  161. mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
  162. if (!(mask & 0x80))
  163. break;
  164. udelay(10);
  165. } while (--retries);
  166. if (!retries) {
  167. printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
  168. netxen_nic_driver_name);
  169. }
  170. } else {
  171. if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
  172. writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
  173. msi_tgt_status[pci_fn]));
  174. }
  175. }
  176. }
  177. static void netxen_nic_enable_int(struct netxen_adapter *adapter)
  178. {
  179. u32 mask;
  180. int port = adapter->portnum;
  181. DPRINTK(1, INFO, "Entered ISR Enable \n");
  182. if (adapter->intr_scheme != -1 &&
  183. adapter->intr_scheme != INTR_SCHEME_PERPORT) {
  184. switch (adapter->ahw.board_type) {
  185. case NETXEN_NIC_GBE:
  186. mask = 0x77b;
  187. break;
  188. case NETXEN_NIC_XGBE:
  189. mask = 0x77f;
  190. break;
  191. default:
  192. mask = 0x7ff;
  193. break;
  194. }
  195. writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
  196. }
  197. writel(0x1, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
  198. if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
  199. mask = 0xbff;
  200. if (adapter->intr_scheme != -1 &&
  201. adapter->intr_scheme != INTR_SCHEME_PERPORT) {
  202. writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
  203. }
  204. writel(mask,
  205. PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
  206. }
  207. DPRINTK(1, INFO, "Done with enable Int\n");
  208. }
  209. /*
  210. * netxen_nic_probe()
  211. *
  212. * The Linux system will invoke this after identifying the vendor ID and
  213. * device Id in the pci_tbl supported by this module.
  214. *
  215. * A quad port card has one operational PCI config space, (function 0),
  216. * which is used to access all four ports.
  217. *
  218. * This routine will initialize the adapter, and setup the global parameters
  219. * along with the port's specific structure.
  220. */
  221. static int __devinit
  222. netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  223. {
  224. struct net_device *netdev = NULL;
  225. struct netxen_adapter *adapter = NULL;
  226. void __iomem *mem_ptr0 = NULL;
  227. void __iomem *mem_ptr1 = NULL;
  228. void __iomem *mem_ptr2 = NULL;
  229. unsigned long first_page_group_end;
  230. unsigned long first_page_group_start;
  231. u8 __iomem *db_ptr = NULL;
  232. unsigned long mem_base, mem_len, db_base, db_len;
  233. int pci_using_dac, i = 0, err;
  234. int ring;
  235. struct netxen_recv_context *recv_ctx = NULL;
  236. struct netxen_rcv_desc_ctx *rcv_desc = NULL;
  237. struct netxen_cmd_buffer *cmd_buf_arr = NULL;
  238. __le64 mac_addr[FLASH_NUM_PORTS + 1];
  239. int valid_mac = 0;
  240. u32 val;
  241. int pci_func_id = PCI_FUNC(pdev->devfn);
  242. DECLARE_MAC_BUF(mac);
  243. printk(KERN_INFO "%s \n", netxen_nic_driver_string);
  244. if (pdev->class != 0x020000) {
  245. printk(KERN_ERR"NetXen function %d, class %x will not "
  246. "be enabled.\n",pci_func_id, pdev->class);
  247. return -ENODEV;
  248. }
  249. if ((err = pci_enable_device(pdev)))
  250. return err;
  251. if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
  252. err = -ENODEV;
  253. goto err_out_disable_pdev;
  254. }
  255. if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
  256. goto err_out_disable_pdev;
  257. pci_set_master(pdev);
  258. if (pdev->revision == NX_P2_C1 &&
  259. (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
  260. (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
  261. pci_using_dac = 1;
  262. } else {
  263. if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
  264. (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
  265. goto err_out_free_res;
  266. pci_using_dac = 0;
  267. }
  268. netdev = alloc_etherdev(sizeof(struct netxen_adapter));
  269. if(!netdev) {
  270. printk(KERN_ERR"%s: Failed to allocate memory for the "
  271. "device block.Check system memory resource"
  272. " usage.\n", netxen_nic_driver_name);
  273. goto err_out_free_res;
  274. }
  275. SET_NETDEV_DEV(netdev, &pdev->dev);
  276. adapter = netdev->priv;
  277. adapter->ahw.pdev = pdev;
  278. adapter->ahw.pci_func = pci_func_id;
  279. spin_lock_init(&adapter->tx_lock);
  280. /* remap phys address */
  281. mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
  282. mem_len = pci_resource_len(pdev, 0);
  283. /* 128 Meg of memory */
  284. if (mem_len == NETXEN_PCI_128MB_SIZE) {
  285. mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
  286. mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
  287. SECOND_PAGE_GROUP_SIZE);
  288. mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
  289. THIRD_PAGE_GROUP_SIZE);
  290. first_page_group_start = FIRST_PAGE_GROUP_START;
  291. first_page_group_end = FIRST_PAGE_GROUP_END;
  292. } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
  293. mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
  294. mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
  295. SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
  296. first_page_group_start = 0;
  297. first_page_group_end = 0;
  298. } else {
  299. err = -EIO;
  300. goto err_out_free_netdev;
  301. }
  302. if ((!mem_ptr0 && mem_len == NETXEN_PCI_128MB_SIZE) ||
  303. !mem_ptr1 || !mem_ptr2) {
  304. DPRINTK(ERR,
  305. "Cannot remap adapter memory aborting.:"
  306. "0 -> %p, 1 -> %p, 2 -> %p\n",
  307. mem_ptr0, mem_ptr1, mem_ptr2);
  308. err = -EIO;
  309. goto err_out_iounmap;
  310. }
  311. db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
  312. db_len = pci_resource_len(pdev, 4);
  313. if (db_len == 0) {
  314. printk(KERN_ERR "%s: doorbell is disabled\n",
  315. netxen_nic_driver_name);
  316. err = -EIO;
  317. goto err_out_iounmap;
  318. }
  319. DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
  320. db_len);
  321. db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
  322. if (!db_ptr) {
  323. printk(KERN_ERR "%s: Failed to allocate doorbell map.",
  324. netxen_nic_driver_name);
  325. err = -EIO;
  326. goto err_out_iounmap;
  327. }
  328. DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
  329. adapter->ahw.pci_base0 = mem_ptr0;
  330. adapter->ahw.first_page_group_start = first_page_group_start;
  331. adapter->ahw.first_page_group_end = first_page_group_end;
  332. adapter->ahw.pci_base1 = mem_ptr1;
  333. adapter->ahw.pci_base2 = mem_ptr2;
  334. adapter->ahw.db_base = db_ptr;
  335. adapter->ahw.db_len = db_len;
  336. adapter->netdev = netdev;
  337. adapter->pdev = pdev;
  338. netif_napi_add(netdev, &adapter->napi,
  339. netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
  340. /* this will be read from FW later */
  341. adapter->intr_scheme = -1;
  342. adapter->msi_mode = -1;
  343. /* This will be reset for mezz cards */
  344. adapter->portnum = pci_func_id;
  345. adapter->status &= ~NETXEN_NETDEV_STATUS;
  346. adapter->rx_csum = 1;
  347. netdev->open = netxen_nic_open;
  348. netdev->stop = netxen_nic_close;
  349. netdev->hard_start_xmit = netxen_nic_xmit_frame;
  350. netdev->get_stats = netxen_nic_get_stats;
  351. netdev->set_multicast_list = netxen_nic_set_multi;
  352. netdev->set_mac_address = netxen_nic_set_mac;
  353. netdev->change_mtu = netxen_nic_change_mtu;
  354. netdev->tx_timeout = netxen_tx_timeout;
  355. netdev->watchdog_timeo = HZ;
  356. netxen_nic_change_mtu(netdev, netdev->mtu);
  357. SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
  358. #ifdef CONFIG_NET_POLL_CONTROLLER
  359. netdev->poll_controller = netxen_nic_poll_controller;
  360. #endif
  361. /* ScatterGather support */
  362. netdev->features = NETIF_F_SG;
  363. netdev->features |= NETIF_F_IP_CSUM;
  364. netdev->features |= NETIF_F_TSO;
  365. if (pci_using_dac)
  366. netdev->features |= NETIF_F_HIGHDMA;
  367. if (pci_enable_msi(pdev))
  368. adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
  369. else
  370. adapter->flags |= NETXEN_NIC_MSI_ENABLED;
  371. netdev->irq = pdev->irq;
  372. INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
  373. /*
  374. * Set the CRB window to invalid. If any register in window 0 is
  375. * accessed it should set the window to 0 and then reset it to 1.
  376. */
  377. adapter->curr_window = 255;
  378. /* initialize the adapter */
  379. netxen_initialize_adapter_hw(adapter);
  380. /*
  381. * Adapter in our case is quad port so initialize it before
  382. * initializing the ports
  383. */
  384. netxen_initialize_adapter_ops(adapter);
  385. adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
  386. if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
  387. (adapter->ahw.boardcfg.board_type ==
  388. NETXEN_BRDTYPE_P2_SB31_2G))
  389. adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
  390. else
  391. adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
  392. adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
  393. adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
  394. cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
  395. if (cmd_buf_arr == NULL) {
  396. printk(KERN_ERR
  397. "%s: Could not allocate cmd_buf_arr memory:%d\n",
  398. netxen_nic_driver_name, (int)TX_RINGSIZE);
  399. err = -ENOMEM;
  400. goto err_out_free_adapter;
  401. }
  402. memset(cmd_buf_arr, 0, TX_RINGSIZE);
  403. adapter->cmd_buf_arr = cmd_buf_arr;
  404. for (i = 0; i < MAX_RCV_CTX; ++i) {
  405. recv_ctx = &adapter->recv_ctx[i];
  406. for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
  407. rcv_desc = &recv_ctx->rcv_desc[ring];
  408. switch (RCV_DESC_TYPE(ring)) {
  409. case RCV_DESC_NORMAL:
  410. rcv_desc->max_rx_desc_count =
  411. adapter->max_rx_desc_count;
  412. rcv_desc->flags = RCV_DESC_NORMAL;
  413. rcv_desc->dma_size = RX_DMA_MAP_LEN;
  414. rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
  415. break;
  416. case RCV_DESC_JUMBO:
  417. rcv_desc->max_rx_desc_count =
  418. adapter->max_jumbo_rx_desc_count;
  419. rcv_desc->flags = RCV_DESC_JUMBO;
  420. rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
  421. rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
  422. break;
  423. case RCV_RING_LRO:
  424. rcv_desc->max_rx_desc_count =
  425. adapter->max_lro_rx_desc_count;
  426. rcv_desc->flags = RCV_DESC_LRO;
  427. rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
  428. rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
  429. break;
  430. }
  431. rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
  432. vmalloc(RCV_BUFFSIZE);
  433. if (rcv_desc->rx_buf_arr == NULL) {
  434. printk(KERN_ERR "%s: Could not allocate "
  435. "rcv_desc->rx_buf_arr memory:%d\n",
  436. netxen_nic_driver_name,
  437. (int)RCV_BUFFSIZE);
  438. err = -ENOMEM;
  439. goto err_out_free_rx_buffer;
  440. }
  441. memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
  442. }
  443. }
  444. netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
  445. /* Mezz cards have PCI function 0,2,3 enabled */
  446. if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
  447. && (pci_func_id >= 2))
  448. adapter->portnum = pci_func_id - 2;
  449. #ifdef CONFIG_IA64
  450. if(adapter->portnum == 0) {
  451. netxen_pinit_from_rom(adapter, 0);
  452. udelay(500);
  453. netxen_load_firmware(adapter);
  454. }
  455. #endif
  456. init_timer(&adapter->watchdog_timer);
  457. adapter->ahw.xg_linkup = 0;
  458. adapter->watchdog_timer.function = &netxen_watchdog;
  459. adapter->watchdog_timer.data = (unsigned long)adapter;
  460. INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
  461. adapter->ahw.pdev = pdev;
  462. adapter->proc_cmd_buf_counter = 0;
  463. adapter->ahw.revision_id = pdev->revision;
  464. /* make sure Window == 1 */
  465. netxen_nic_pci_change_crbwindow(adapter, 1);
  466. netxen_nic_update_cmd_producer(adapter, 0);
  467. netxen_nic_update_cmd_consumer(adapter, 0);
  468. writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
  469. if (netxen_is_flash_supported(adapter) == 0 &&
  470. netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
  471. valid_mac = 1;
  472. else
  473. valid_mac = 0;
  474. if (valid_mac) {
  475. unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
  476. netdev->dev_addr[0] = *(p + 5);
  477. netdev->dev_addr[1] = *(p + 4);
  478. netdev->dev_addr[2] = *(p + 3);
  479. netdev->dev_addr[3] = *(p + 2);
  480. netdev->dev_addr[4] = *(p + 1);
  481. netdev->dev_addr[5] = *(p + 0);
  482. memcpy(netdev->perm_addr, netdev->dev_addr,
  483. netdev->addr_len);
  484. if (!is_valid_ether_addr(netdev->perm_addr)) {
  485. printk(KERN_ERR "%s: Bad MAC address %s.\n",
  486. netxen_nic_driver_name,
  487. print_mac(mac, netdev->dev_addr));
  488. } else {
  489. if (adapter->macaddr_set)
  490. adapter->macaddr_set(adapter,
  491. netdev->dev_addr);
  492. }
  493. }
  494. if (adapter->portnum == 0) {
  495. err = netxen_initialize_adapter_offload(adapter);
  496. if (err)
  497. goto err_out_free_rx_buffer;
  498. val = readl(NETXEN_CRB_NORMALIZE(adapter,
  499. NETXEN_CAM_RAM(0x1fc)));
  500. if (val == 0x55555555) {
  501. /* This is the first boot after power up */
  502. netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
  503. if (!(val & 0x4)) {
  504. val |= 0x4;
  505. netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
  506. netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
  507. if (!(val & 0x4))
  508. printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
  509. netxen_nic_driver_name);
  510. }
  511. val = readl(NETXEN_CRB_NORMALIZE(adapter,
  512. NETXEN_ROMUSB_GLB_SW_RESET));
  513. printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
  514. if (val != 0x80000f) {
  515. /* clear the register for future unloads/loads */
  516. writel(0, NETXEN_CRB_NORMALIZE(adapter,
  517. NETXEN_CAM_RAM(0x1fc)));
  518. printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
  519. err = -ENODEV;
  520. goto err_out_free_dev;
  521. }
  522. }
  523. /* clear the register for future unloads/loads */
  524. writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
  525. printk(KERN_INFO "State: 0x%0x\n",
  526. readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
  527. /*
  528. * Tell the hardware our version number.
  529. */
  530. i = (_NETXEN_NIC_LINUX_MAJOR << 16)
  531. | ((_NETXEN_NIC_LINUX_MINOR << 8))
  532. | (_NETXEN_NIC_LINUX_SUBVERSION);
  533. writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
  534. /* Unlock the HW, prompting the boot sequence */
  535. writel(1,
  536. NETXEN_CRB_NORMALIZE(adapter,
  537. NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
  538. /* Handshake with the card before we register the devices. */
  539. netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
  540. }
  541. /*
  542. * See if the firmware gave us a virtual-physical port mapping.
  543. */
  544. i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
  545. if (i != 0x55555555)
  546. physical_port[adapter->portnum] = i;
  547. netif_carrier_off(netdev);
  548. netif_stop_queue(netdev);
  549. if ((err = register_netdev(netdev))) {
  550. printk(KERN_ERR "%s: register_netdev failed port #%d"
  551. " aborting\n", netxen_nic_driver_name,
  552. adapter->portnum);
  553. err = -EIO;
  554. goto err_out_free_dev;
  555. }
  556. pci_set_drvdata(pdev, adapter);
  557. switch (adapter->ahw.board_type) {
  558. case NETXEN_NIC_GBE:
  559. printk(KERN_INFO "%s: QUAD GbE board initialized\n",
  560. netxen_nic_driver_name);
  561. break;
  562. case NETXEN_NIC_XGBE:
  563. printk(KERN_INFO "%s: XGbE board initialized\n",
  564. netxen_nic_driver_name);
  565. break;
  566. }
  567. adapter->driver_mismatch = 0;
  568. return 0;
  569. err_out_free_dev:
  570. if (adapter->portnum == 0)
  571. netxen_free_adapter_offload(adapter);
  572. err_out_free_rx_buffer:
  573. for (i = 0; i < MAX_RCV_CTX; ++i) {
  574. recv_ctx = &adapter->recv_ctx[i];
  575. for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
  576. rcv_desc = &recv_ctx->rcv_desc[ring];
  577. if (rcv_desc->rx_buf_arr != NULL) {
  578. vfree(rcv_desc->rx_buf_arr);
  579. rcv_desc->rx_buf_arr = NULL;
  580. }
  581. }
  582. }
  583. vfree(cmd_buf_arr);
  584. err_out_free_adapter:
  585. if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
  586. pci_disable_msi(pdev);
  587. pci_set_drvdata(pdev, NULL);
  588. if (db_ptr)
  589. iounmap(db_ptr);
  590. err_out_iounmap:
  591. if (mem_ptr0)
  592. iounmap(mem_ptr0);
  593. if (mem_ptr1)
  594. iounmap(mem_ptr1);
  595. if (mem_ptr2)
  596. iounmap(mem_ptr2);
  597. err_out_free_netdev:
  598. free_netdev(netdev);
  599. err_out_free_res:
  600. pci_release_regions(pdev);
  601. err_out_disable_pdev:
  602. pci_disable_device(pdev);
  603. return err;
  604. }
  605. static void __devexit netxen_nic_remove(struct pci_dev *pdev)
  606. {
  607. struct netxen_adapter *adapter;
  608. struct net_device *netdev;
  609. struct netxen_rx_buffer *buffer;
  610. struct netxen_recv_context *recv_ctx;
  611. struct netxen_rcv_desc_ctx *rcv_desc;
  612. int i, ctxid, ring;
  613. static int init_firmware_done = 0;
  614. adapter = pci_get_drvdata(pdev);
  615. if (adapter == NULL)
  616. return;
  617. netdev = adapter->netdev;
  618. unregister_netdev(netdev);
  619. if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
  620. init_firmware_done++;
  621. netxen_free_hw_resources(adapter);
  622. }
  623. for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
  624. recv_ctx = &adapter->recv_ctx[ctxid];
  625. for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
  626. rcv_desc = &recv_ctx->rcv_desc[ring];
  627. for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
  628. buffer = &(rcv_desc->rx_buf_arr[i]);
  629. if (buffer->state == NETXEN_BUFFER_FREE)
  630. continue;
  631. pci_unmap_single(pdev, buffer->dma,
  632. rcv_desc->dma_size,
  633. PCI_DMA_FROMDEVICE);
  634. if (buffer->skb != NULL)
  635. dev_kfree_skb_any(buffer->skb);
  636. }
  637. vfree(rcv_desc->rx_buf_arr);
  638. }
  639. }
  640. vfree(adapter->cmd_buf_arr);
  641. if (adapter->portnum == 0) {
  642. if (init_firmware_done) {
  643. i = 100;
  644. do {
  645. if (dma_watchdog_shutdown_request(adapter) == 1)
  646. break;
  647. msleep(100);
  648. if (dma_watchdog_shutdown_poll_result(adapter) == 1)
  649. break;
  650. } while (--i);
  651. if (i == 0)
  652. printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
  653. netdev->name);
  654. /* clear the register for future unloads/loads */
  655. writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
  656. printk(KERN_INFO "State: 0x%0x\n",
  657. readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
  658. /* leave the hw in the same state as reboot */
  659. writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
  660. netxen_pinit_from_rom(adapter, 0);
  661. msleep(1);
  662. netxen_load_firmware(adapter);
  663. netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
  664. }
  665. /* clear the register for future unloads/loads */
  666. writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
  667. printk(KERN_INFO "State: 0x%0x\n",
  668. readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
  669. i = 100;
  670. do {
  671. if (dma_watchdog_shutdown_request(adapter) == 1)
  672. break;
  673. msleep(100);
  674. if (dma_watchdog_shutdown_poll_result(adapter) == 1)
  675. break;
  676. } while (--i);
  677. if (i) {
  678. netxen_free_adapter_offload(adapter);
  679. } else {
  680. printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
  681. netdev->name);
  682. }
  683. }
  684. if (adapter->irq)
  685. free_irq(adapter->irq, adapter);
  686. if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
  687. pci_disable_msi(pdev);
  688. iounmap(adapter->ahw.db_base);
  689. iounmap(adapter->ahw.pci_base0);
  690. iounmap(adapter->ahw.pci_base1);
  691. iounmap(adapter->ahw.pci_base2);
  692. pci_release_regions(pdev);
  693. pci_disable_device(pdev);
  694. pci_set_drvdata(pdev, NULL);
  695. free_netdev(netdev);
  696. }
  697. /*
  698. * Called when a network interface is made active
  699. * @returns 0 on success, negative value on failure
  700. */
  701. static int netxen_nic_open(struct net_device *netdev)
  702. {
  703. struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
  704. int err = 0;
  705. int ctx, ring;
  706. if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
  707. err = netxen_init_firmware(adapter);
  708. if (err != 0) {
  709. printk(KERN_ERR "Failed to init firmware\n");
  710. return -EIO;
  711. }
  712. netxen_nic_flash_print(adapter);
  713. /* setup all the resources for the Phantom... */
  714. /* this include the descriptors for rcv, tx, and status */
  715. netxen_nic_clear_stats(adapter);
  716. err = netxen_nic_hw_resources(adapter);
  717. if (err) {
  718. printk(KERN_ERR "Error in setting hw resources:%d\n",
  719. err);
  720. return err;
  721. }
  722. for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
  723. for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
  724. netxen_post_rx_buffers(adapter, ctx, ring);
  725. }
  726. adapter->irq = adapter->ahw.pdev->irq;
  727. err = request_irq(adapter->ahw.pdev->irq, netxen_intr,
  728. IRQF_SHARED|IRQF_SAMPLE_RANDOM, netdev->name,
  729. adapter);
  730. if (err) {
  731. printk(KERN_ERR "request_irq failed with: %d\n", err);
  732. netxen_free_hw_resources(adapter);
  733. return err;
  734. }
  735. adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
  736. }
  737. if (!adapter->driver_mismatch)
  738. mod_timer(&adapter->watchdog_timer, jiffies);
  739. napi_enable(&adapter->napi);
  740. netxen_nic_enable_int(adapter);
  741. /* Done here again so that even if phantom sw overwrote it,
  742. * we set it */
  743. if (adapter->init_port
  744. && adapter->init_port(adapter, adapter->portnum) != 0) {
  745. del_timer_sync(&adapter->watchdog_timer);
  746. printk(KERN_ERR "%s: Failed to initialize port %d\n",
  747. netxen_nic_driver_name, adapter->portnum);
  748. napi_disable(&adapter->napi);
  749. return -EIO;
  750. }
  751. if (adapter->macaddr_set)
  752. adapter->macaddr_set(adapter, netdev->dev_addr);
  753. netxen_nic_set_link_parameters(adapter);
  754. netxen_nic_set_multi(netdev);
  755. if (adapter->set_mtu)
  756. adapter->set_mtu(adapter, netdev->mtu);
  757. if (!adapter->driver_mismatch)
  758. netif_start_queue(netdev);
  759. return 0;
  760. }
  761. /*
  762. * netxen_nic_close - Disables a network interface entry point
  763. */
  764. static int netxen_nic_close(struct net_device *netdev)
  765. {
  766. struct netxen_adapter *adapter = netdev_priv(netdev);
  767. int i, j;
  768. struct netxen_cmd_buffer *cmd_buff;
  769. struct netxen_skb_frag *buffrag;
  770. netif_carrier_off(netdev);
  771. netif_stop_queue(netdev);
  772. napi_disable(&adapter->napi);
  773. if (adapter->stop_port)
  774. adapter->stop_port(adapter);
  775. netxen_nic_disable_int(adapter);
  776. cmd_buff = adapter->cmd_buf_arr;
  777. for (i = 0; i < adapter->max_tx_desc_count; i++) {
  778. buffrag = cmd_buff->frag_array;
  779. if (buffrag->dma) {
  780. pci_unmap_single(adapter->pdev, buffrag->dma,
  781. buffrag->length, PCI_DMA_TODEVICE);
  782. buffrag->dma = 0ULL;
  783. }
  784. for (j = 0; j < cmd_buff->frag_count; j++) {
  785. buffrag++;
  786. if (buffrag->dma) {
  787. pci_unmap_page(adapter->pdev, buffrag->dma,
  788. buffrag->length,
  789. PCI_DMA_TODEVICE);
  790. buffrag->dma = 0ULL;
  791. }
  792. }
  793. /* Free the skb we received in netxen_nic_xmit_frame */
  794. if (cmd_buff->skb) {
  795. dev_kfree_skb_any(cmd_buff->skb);
  796. cmd_buff->skb = NULL;
  797. }
  798. cmd_buff++;
  799. }
  800. if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
  801. FLUSH_SCHEDULED_WORK();
  802. del_timer_sync(&adapter->watchdog_timer);
  803. }
  804. return 0;
  805. }
  806. static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
  807. {
  808. struct netxen_adapter *adapter = netdev_priv(netdev);
  809. struct netxen_hardware_context *hw = &adapter->ahw;
  810. unsigned int first_seg_len = skb->len - skb->data_len;
  811. struct netxen_skb_frag *buffrag;
  812. unsigned int i;
  813. u32 producer = 0;
  814. u32 saved_producer = 0;
  815. struct cmd_desc_type0 *hwdesc;
  816. int k;
  817. struct netxen_cmd_buffer *pbuf = NULL;
  818. static int dropped_packet = 0;
  819. int frag_count;
  820. u32 local_producer = 0;
  821. u32 max_tx_desc_count = 0;
  822. u32 last_cmd_consumer = 0;
  823. int no_of_desc;
  824. adapter->stats.xmitcalled++;
  825. frag_count = skb_shinfo(skb)->nr_frags + 1;
  826. if (unlikely(skb->len <= 0)) {
  827. dev_kfree_skb_any(skb);
  828. adapter->stats.badskblen++;
  829. return NETDEV_TX_OK;
  830. }
  831. if (frag_count > MAX_BUFFERS_PER_CMD) {
  832. printk("%s: %s netxen_nic_xmit_frame: frag_count (%d) "
  833. "too large, can handle only %d frags\n",
  834. netxen_nic_driver_name, netdev->name,
  835. frag_count, MAX_BUFFERS_PER_CMD);
  836. adapter->stats.txdropped++;
  837. if ((++dropped_packet & 0xff) == 0xff)
  838. printk("%s: %s droppped packets = %d\n",
  839. netxen_nic_driver_name, netdev->name,
  840. dropped_packet);
  841. return NETDEV_TX_OK;
  842. }
  843. /* There 4 fragments per descriptor */
  844. no_of_desc = (frag_count + 3) >> 2;
  845. if (netdev->features & NETIF_F_TSO) {
  846. if (skb_shinfo(skb)->gso_size > 0) {
  847. no_of_desc++;
  848. if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
  849. sizeof(struct ethhdr)) >
  850. (sizeof(struct cmd_desc_type0) - 2)) {
  851. no_of_desc++;
  852. }
  853. }
  854. }
  855. spin_lock_bh(&adapter->tx_lock);
  856. if (adapter->total_threads >= MAX_XMIT_PRODUCERS) {
  857. goto out_requeue;
  858. }
  859. local_producer = adapter->cmd_producer;
  860. k = adapter->cmd_producer;
  861. max_tx_desc_count = adapter->max_tx_desc_count;
  862. last_cmd_consumer = adapter->last_cmd_consumer;
  863. if ((k + no_of_desc) >=
  864. ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
  865. last_cmd_consumer)) {
  866. goto out_requeue;
  867. }
  868. k = get_index_range(k, max_tx_desc_count, no_of_desc);
  869. adapter->cmd_producer = k;
  870. adapter->total_threads++;
  871. adapter->num_threads++;
  872. spin_unlock_bh(&adapter->tx_lock);
  873. /* Copy the descriptors into the hardware */
  874. producer = local_producer;
  875. saved_producer = producer;
  876. hwdesc = &hw->cmd_desc_head[producer];
  877. memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
  878. /* Take skb->data itself */
  879. pbuf = &adapter->cmd_buf_arr[producer];
  880. if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
  881. pbuf->mss = skb_shinfo(skb)->gso_size;
  882. hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
  883. } else {
  884. pbuf->mss = 0;
  885. hwdesc->mss = 0;
  886. }
  887. pbuf->total_length = skb->len;
  888. pbuf->skb = skb;
  889. pbuf->cmd = TX_ETHER_PKT;
  890. pbuf->frag_count = frag_count;
  891. pbuf->port = adapter->portnum;
  892. buffrag = &pbuf->frag_array[0];
  893. buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
  894. PCI_DMA_TODEVICE);
  895. buffrag->length = first_seg_len;
  896. netxen_set_cmd_desc_totallength(hwdesc, skb->len);
  897. netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
  898. netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
  899. netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
  900. netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
  901. hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
  902. hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
  903. for (i = 1, k = 1; i < frag_count; i++, k++) {
  904. struct skb_frag_struct *frag;
  905. int len, temp_len;
  906. unsigned long offset;
  907. dma_addr_t temp_dma;
  908. /* move to next desc. if there is a need */
  909. if ((i & 0x3) == 0) {
  910. k = 0;
  911. producer = get_next_index(producer,
  912. adapter->max_tx_desc_count);
  913. hwdesc = &hw->cmd_desc_head[producer];
  914. memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
  915. pbuf = &adapter->cmd_buf_arr[producer];
  916. pbuf->skb = NULL;
  917. }
  918. frag = &skb_shinfo(skb)->frags[i - 1];
  919. len = frag->size;
  920. offset = frag->page_offset;
  921. temp_len = len;
  922. temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
  923. len, PCI_DMA_TODEVICE);
  924. buffrag++;
  925. buffrag->dma = temp_dma;
  926. buffrag->length = temp_len;
  927. DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
  928. switch (k) {
  929. case 0:
  930. hwdesc->buffer1_length = cpu_to_le16(temp_len);
  931. hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
  932. break;
  933. case 1:
  934. hwdesc->buffer2_length = cpu_to_le16(temp_len);
  935. hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
  936. break;
  937. case 2:
  938. hwdesc->buffer3_length = cpu_to_le16(temp_len);
  939. hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
  940. break;
  941. case 3:
  942. hwdesc->buffer4_length = cpu_to_le16(temp_len);
  943. hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
  944. break;
  945. }
  946. frag++;
  947. }
  948. producer = get_next_index(producer, adapter->max_tx_desc_count);
  949. /* might change opcode to TX_TCP_LSO */
  950. netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
  951. /* For LSO, we need to copy the MAC/IP/TCP headers into
  952. * the descriptor ring
  953. */
  954. if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
  955. == TX_TCP_LSO) {
  956. int hdr_len, first_hdr_len, more_hdr;
  957. hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
  958. if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
  959. first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
  960. more_hdr = 1;
  961. } else {
  962. first_hdr_len = hdr_len;
  963. more_hdr = 0;
  964. }
  965. /* copy the MAC/IP/TCP headers to the cmd descriptor list */
  966. hwdesc = &hw->cmd_desc_head[producer];
  967. pbuf = &adapter->cmd_buf_arr[producer];
  968. pbuf->skb = NULL;
  969. /* copy the first 64 bytes */
  970. memcpy(((void *)hwdesc) + 2,
  971. (void *)(skb->data), first_hdr_len);
  972. producer = get_next_index(producer, max_tx_desc_count);
  973. if (more_hdr) {
  974. hwdesc = &hw->cmd_desc_head[producer];
  975. pbuf = &adapter->cmd_buf_arr[producer];
  976. pbuf->skb = NULL;
  977. /* copy the next 64 bytes - should be enough except
  978. * for pathological case
  979. */
  980. skb_copy_from_linear_data_offset(skb, first_hdr_len,
  981. hwdesc,
  982. (hdr_len -
  983. first_hdr_len));
  984. producer = get_next_index(producer, max_tx_desc_count);
  985. }
  986. }
  987. spin_lock_bh(&adapter->tx_lock);
  988. adapter->stats.txbytes += skb->len;
  989. /* Code to update the adapter considering how many producer threads
  990. are currently working */
  991. if ((--adapter->num_threads) == 0) {
  992. /* This is the last thread */
  993. u32 crb_producer = adapter->cmd_producer;
  994. netxen_nic_update_cmd_producer(adapter, crb_producer);
  995. wmb();
  996. adapter->total_threads = 0;
  997. }
  998. adapter->stats.xmitfinished++;
  999. netdev->trans_start = jiffies;
  1000. spin_unlock_bh(&adapter->tx_lock);
  1001. return NETDEV_TX_OK;
  1002. out_requeue:
  1003. netif_stop_queue(netdev);
  1004. adapter->flags |= NETXEN_NETDEV_STATUS;
  1005. spin_unlock_bh(&adapter->tx_lock);
  1006. return NETDEV_TX_BUSY;
  1007. }
  1008. static void netxen_watchdog(unsigned long v)
  1009. {
  1010. struct netxen_adapter *adapter = (struct netxen_adapter *)v;
  1011. SCHEDULE_WORK(&adapter->watchdog_task);
  1012. }
  1013. static void netxen_tx_timeout(struct net_device *netdev)
  1014. {
  1015. struct netxen_adapter *adapter = (struct netxen_adapter *)
  1016. netdev_priv(netdev);
  1017. SCHEDULE_WORK(&adapter->tx_timeout_task);
  1018. }
  1019. static void netxen_tx_timeout_task(struct work_struct *work)
  1020. {
  1021. struct netxen_adapter *adapter =
  1022. container_of(work, struct netxen_adapter, tx_timeout_task);
  1023. printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
  1024. netxen_nic_driver_name, adapter->netdev->name);
  1025. netxen_nic_close(adapter->netdev);
  1026. netxen_nic_open(adapter->netdev);
  1027. adapter->netdev->trans_start = jiffies;
  1028. netif_wake_queue(adapter->netdev);
  1029. }
  1030. static int
  1031. netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
  1032. {
  1033. u32 ret = 0;
  1034. DPRINTK(INFO, "Entered handle ISR\n");
  1035. adapter->stats.ints++;
  1036. netxen_nic_disable_int(adapter);
  1037. if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
  1038. if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
  1039. /*
  1040. * Interrupts are already disabled.
  1041. */
  1042. __netif_rx_schedule(netdev, &adapter->napi);
  1043. } else {
  1044. static unsigned int intcount = 0;
  1045. if ((++intcount & 0xfff) == 0xfff)
  1046. DPRINTK(KERN_ERR
  1047. "%s: %s interrupt %d while in poll\n",
  1048. netxen_nic_driver_name, netdev->name,
  1049. intcount);
  1050. }
  1051. ret = 1;
  1052. }
  1053. if (ret == 0) {
  1054. netxen_nic_enable_int(adapter);
  1055. }
  1056. return ret;
  1057. }
  1058. /*
  1059. * netxen_intr - Interrupt Handler
  1060. * @irq: interrupt number
  1061. * data points to adapter stucture (which may be handling more than 1 port
  1062. */
  1063. irqreturn_t netxen_intr(int irq, void *data)
  1064. {
  1065. struct netxen_adapter *adapter = data;
  1066. struct net_device *netdev = adapter->netdev;
  1067. u32 our_int = 0;
  1068. if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
  1069. our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
  1070. /* not our interrupt */
  1071. if ((our_int & (0x80 << adapter->portnum)) == 0)
  1072. return IRQ_NONE;
  1073. }
  1074. if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
  1075. /* claim interrupt */
  1076. if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
  1077. writel(our_int & ~((u32)(0x80 << adapter->portnum)),
  1078. NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
  1079. }
  1080. }
  1081. if (netif_running(netdev))
  1082. netxen_handle_int(adapter, netdev);
  1083. return IRQ_HANDLED;
  1084. }
  1085. static int netxen_nic_poll(struct napi_struct *napi, int budget)
  1086. {
  1087. struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
  1088. struct net_device *netdev = adapter->netdev;
  1089. int done = 1;
  1090. int ctx;
  1091. int work_done;
  1092. DPRINTK(INFO, "polling for %d descriptors\n", *budget);
  1093. work_done = 0;
  1094. for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
  1095. /*
  1096. * Fairness issue. This will give undue weight to the
  1097. * receive context 0.
  1098. */
  1099. /*
  1100. * To avoid starvation, we give each of our receivers,
  1101. * a fraction of the quota. Sometimes, it might happen that we
  1102. * have enough quota to process every packet, but since all the
  1103. * packets are on one context, it gets only half of the quota,
  1104. * and ends up not processing it.
  1105. */
  1106. work_done += netxen_process_rcv_ring(adapter, ctx,
  1107. budget / MAX_RCV_CTX);
  1108. }
  1109. if (work_done >= budget)
  1110. done = 0;
  1111. if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
  1112. done = 0;
  1113. DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
  1114. work_done, work_to_do);
  1115. if (done) {
  1116. netif_rx_complete(netdev, napi);
  1117. netxen_nic_enable_int(adapter);
  1118. }
  1119. return work_done;
  1120. }
  1121. #ifdef CONFIG_NET_POLL_CONTROLLER
  1122. static void netxen_nic_poll_controller(struct net_device *netdev)
  1123. {
  1124. struct netxen_adapter *adapter = netdev_priv(netdev);
  1125. disable_irq(adapter->irq);
  1126. netxen_intr(adapter->irq, adapter);
  1127. enable_irq(adapter->irq);
  1128. }
  1129. #endif
  1130. static struct pci_driver netxen_driver = {
  1131. .name = netxen_nic_driver_name,
  1132. .id_table = netxen_pci_tbl,
  1133. .probe = netxen_nic_probe,
  1134. .remove = __devexit_p(netxen_nic_remove)
  1135. };
  1136. /* Driver Registration on NetXen card */
  1137. static int __init netxen_init_module(void)
  1138. {
  1139. if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
  1140. return -ENOMEM;
  1141. return pci_register_driver(&netxen_driver);
  1142. }
  1143. module_init(netxen_init_module);
  1144. static void __exit netxen_exit_module(void)
  1145. {
  1146. /*
  1147. * Wait for some time to allow the dma to drain, if any.
  1148. */
  1149. msleep(100);
  1150. pci_unregister_driver(&netxen_driver);
  1151. destroy_workqueue(netxen_workq);
  1152. }
  1153. module_exit(netxen_exit_module);