netxen_nic_main.c 33 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. #define DEFINE_GLOBAL_RECV_CRB
  38. #include "netxen_nic_phan_reg.h"
  39. #include "netxen_nic_ioctl.h"
  40. #include <linux/dma-mapping.h>
  41. #include <linux/vmalloc.h>
  42. #define PHAN_VENDOR_ID 0x4040
  43. MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
  44. MODULE_LICENSE("GPL");
  45. MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
  46. char netxen_nic_driver_name[] = "netxen-nic";
  47. static char netxen_nic_driver_string[] = "NetXen Network Driver version "
  48. NETXEN_NIC_LINUX_VERSIONID;
  49. #define NETXEN_NETDEV_WEIGHT 120
  50. #define NETXEN_ADAPTER_UP_MAGIC 777
  51. #define NETXEN_NIC_PEG_TUNE 0
  52. u8 nx_p2_id = NX_P2_C0;
  53. #define DMA_32BIT_MASK 0x00000000ffffffffULL
  54. #define DMA_35BIT_MASK 0x00000007ffffffffULL
  55. /* Local functions to NetXen NIC driver */
  56. static int __devinit netxen_nic_probe(struct pci_dev *pdev,
  57. const struct pci_device_id *ent);
  58. static void __devexit netxen_nic_remove(struct pci_dev *pdev);
  59. static int netxen_nic_open(struct net_device *netdev);
  60. static int netxen_nic_close(struct net_device *netdev);
  61. static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
  62. static void netxen_tx_timeout(struct net_device *netdev);
  63. static void netxen_tx_timeout_task(struct work_struct *work);
  64. static void netxen_watchdog(unsigned long);
  65. static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
  66. static int netxen_nic_ioctl(struct net_device *netdev,
  67. struct ifreq *ifr, int cmd);
  68. static int netxen_nic_poll(struct net_device *dev, int *budget);
  69. #ifdef CONFIG_NET_POLL_CONTROLLER
  70. static void netxen_nic_poll_controller(struct net_device *netdev);
  71. #endif
  72. static irqreturn_t netxen_intr(int irq, void *data);
  73. /* PCI Device ID Table */
  74. static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
  75. {PCI_DEVICE(0x4040, 0x0001)},
  76. {PCI_DEVICE(0x4040, 0x0002)},
  77. {PCI_DEVICE(0x4040, 0x0003)},
  78. {PCI_DEVICE(0x4040, 0x0004)},
  79. {PCI_DEVICE(0x4040, 0x0005)},
  80. {PCI_DEVICE(0x4040, 0x0024)},
  81. {PCI_DEVICE(0x4040, 0x0025)},
  82. {0,}
  83. };
  84. MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
  85. struct workqueue_struct *netxen_workq;
  86. static void netxen_watchdog(unsigned long);
  87. /*
  88. * netxen_nic_probe()
  89. *
  90. * The Linux system will invoke this after identifying the vendor ID and
  91. * device Id in the pci_tbl supported by this module.
  92. *
  93. * A quad port card has one operational PCI config space, (function 0),
  94. * which is used to access all four ports.
  95. *
  96. * This routine will initialize the adapter, and setup the global parameters
  97. * along with the port's specific structure.
  98. */
  99. static int __devinit
  100. netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  101. {
  102. struct net_device *netdev = NULL;
  103. struct netxen_adapter *adapter = NULL;
  104. struct netxen_port *port = NULL;
  105. void __iomem *mem_ptr0 = NULL;
  106. void __iomem *mem_ptr1 = NULL;
  107. void __iomem *mem_ptr2 = NULL;
  108. u8 *db_ptr = NULL;
  109. unsigned long mem_base, mem_len, db_base, db_len;
  110. int pci_using_dac, i, err;
  111. int ring;
  112. struct netxen_recv_context *recv_ctx = NULL;
  113. struct netxen_rcv_desc_ctx *rcv_desc = NULL;
  114. struct netxen_cmd_buffer *cmd_buf_arr = NULL;
  115. u64 mac_addr[FLASH_NUM_PORTS + 1];
  116. int valid_mac = 0;
  117. printk(KERN_INFO "%s \n", netxen_nic_driver_string);
  118. /* In current scheme, we use only PCI function 0 */
  119. if (PCI_FUNC(pdev->devfn) != 0) {
  120. DPRINTK(ERR, "NetXen function %d will not be enabled.\n",
  121. PCI_FUNC(pdev->devfn));
  122. return -ENODEV;
  123. }
  124. if ((err = pci_enable_device(pdev)))
  125. return err;
  126. if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
  127. err = -ENODEV;
  128. goto err_out_disable_pdev;
  129. }
  130. if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
  131. goto err_out_disable_pdev;
  132. pci_set_master(pdev);
  133. pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id);
  134. if (nx_p2_id == NX_P2_C1 &&
  135. (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
  136. (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
  137. pci_using_dac = 1;
  138. } else {
  139. if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
  140. (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
  141. goto err_out_free_res;
  142. pci_using_dac = 0;
  143. }
  144. /* remap phys address */
  145. mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
  146. mem_len = pci_resource_len(pdev, 0);
  147. /* 128 Meg of memory */
  148. mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
  149. mem_ptr1 =
  150. ioremap(mem_base + SECOND_PAGE_GROUP_START, SECOND_PAGE_GROUP_SIZE);
  151. mem_ptr2 =
  152. ioremap(mem_base + THIRD_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
  153. if ((mem_ptr0 == 0UL) || (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
  154. DPRINTK(ERR,
  155. "Cannot remap adapter memory aborting.:"
  156. "0 -> %p, 1 -> %p, 2 -> %p\n",
  157. mem_ptr0, mem_ptr1, mem_ptr2);
  158. err = -EIO;
  159. goto err_out_iounmap;
  160. }
  161. db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
  162. db_len = pci_resource_len(pdev, 4);
  163. if (db_len == 0) {
  164. printk(KERN_ERR "%s: doorbell is disabled\n",
  165. netxen_nic_driver_name);
  166. err = -EIO;
  167. goto err_out_iounmap;
  168. }
  169. DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
  170. db_len);
  171. db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
  172. if (db_ptr == 0UL) {
  173. printk(KERN_ERR "%s: Failed to allocate doorbell map.",
  174. netxen_nic_driver_name);
  175. err = -EIO;
  176. goto err_out_iounmap;
  177. }
  178. DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
  179. /*
  180. * Allocate a adapter structure which will manage all the initialization
  181. * as well as the common resources for all ports...
  182. * all the ports will have pointer to this adapter as well as Adapter
  183. * will have pointers of all the ports structures.
  184. */
  185. /* One adapter structure for all 4 ports.... */
  186. adapter = kzalloc(sizeof(struct netxen_adapter), GFP_KERNEL);
  187. if (adapter == NULL) {
  188. printk(KERN_ERR "%s: Could not allocate adapter memory:%d\n",
  189. netxen_nic_driver_name,
  190. (int)sizeof(struct netxen_adapter));
  191. err = -ENOMEM;
  192. goto err_out_dbunmap;
  193. }
  194. adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS;
  195. adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
  196. adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
  197. adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
  198. pci_set_drvdata(pdev, adapter);
  199. cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
  200. if (cmd_buf_arr == NULL) {
  201. printk(KERN_ERR
  202. "%s: Could not allocate cmd_buf_arr memory:%d\n",
  203. netxen_nic_driver_name, (int)TX_RINGSIZE);
  204. err = -ENOMEM;
  205. goto err_out_free_adapter;
  206. }
  207. memset(cmd_buf_arr, 0, TX_RINGSIZE);
  208. for (i = 0; i < MAX_RCV_CTX; ++i) {
  209. recv_ctx = &adapter->recv_ctx[i];
  210. for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
  211. rcv_desc = &recv_ctx->rcv_desc[ring];
  212. switch (RCV_DESC_TYPE(ring)) {
  213. case RCV_DESC_NORMAL:
  214. rcv_desc->max_rx_desc_count =
  215. adapter->max_rx_desc_count;
  216. rcv_desc->flags = RCV_DESC_NORMAL;
  217. rcv_desc->dma_size = RX_DMA_MAP_LEN;
  218. rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
  219. break;
  220. case RCV_DESC_JUMBO:
  221. rcv_desc->max_rx_desc_count =
  222. adapter->max_jumbo_rx_desc_count;
  223. rcv_desc->flags = RCV_DESC_JUMBO;
  224. rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
  225. rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
  226. break;
  227. case RCV_RING_LRO:
  228. rcv_desc->max_rx_desc_count =
  229. adapter->max_lro_rx_desc_count;
  230. rcv_desc->flags = RCV_DESC_LRO;
  231. rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
  232. rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
  233. break;
  234. }
  235. rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
  236. vmalloc(RCV_BUFFSIZE);
  237. if (rcv_desc->rx_buf_arr == NULL) {
  238. printk(KERN_ERR "%s: Could not allocate"
  239. "rcv_desc->rx_buf_arr memory:%d\n",
  240. netxen_nic_driver_name,
  241. (int)RCV_BUFFSIZE);
  242. err = -ENOMEM;
  243. goto err_out_free_rx_buffer;
  244. }
  245. memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
  246. }
  247. }
  248. adapter->cmd_buf_arr = cmd_buf_arr;
  249. adapter->ahw.pci_base0 = mem_ptr0;
  250. adapter->ahw.pci_base1 = mem_ptr1;
  251. adapter->ahw.pci_base2 = mem_ptr2;
  252. adapter->ahw.db_base = db_ptr;
  253. adapter->ahw.db_len = db_len;
  254. spin_lock_init(&adapter->tx_lock);
  255. spin_lock_init(&adapter->lock);
  256. netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
  257. #ifdef CONFIG_IA64
  258. netxen_pinit_from_rom(adapter, 0);
  259. udelay(500);
  260. netxen_load_firmware(adapter);
  261. #endif
  262. /*
  263. * Set the CRB window to invalid. If any register in window 0 is
  264. * accessed it should set the window to 0 and then reset it to 1.
  265. */
  266. adapter->curr_window = 255;
  267. /*
  268. * Adapter in our case is quad port so initialize it before
  269. * initializing the ports
  270. */
  271. netxen_initialize_adapter_hw(adapter); /* initialize the adapter */
  272. netxen_initialize_adapter_ops(adapter);
  273. init_timer(&adapter->watchdog_timer);
  274. adapter->ahw.xg_linkup = 0;
  275. adapter->watchdog_timer.function = &netxen_watchdog;
  276. adapter->watchdog_timer.data = (unsigned long)adapter;
  277. INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
  278. adapter->ahw.pdev = pdev;
  279. adapter->proc_cmd_buf_counter = 0;
  280. adapter->ahw.revision_id = nx_p2_id;
  281. if (pci_enable_msi(pdev)) {
  282. adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
  283. printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
  284. " error\n", netxen_nic_driver_name);
  285. } else
  286. adapter->flags |= NETXEN_NIC_MSI_ENABLED;
  287. if (netxen_is_flash_supported(adapter) == 0 &&
  288. netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
  289. valid_mac = 1;
  290. else
  291. valid_mac = 0;
  292. /*
  293. * Initialize all the CRB registers here.
  294. */
  295. writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
  296. writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
  297. writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
  298. /* do this before waking up pegs so that we have valid dummy dma addr */
  299. err = netxen_initialize_adapter_offload(adapter);
  300. if (err) {
  301. goto err_out_free_dev;
  302. }
  303. /* Unlock the HW, prompting the boot sequence */
  304. writel(1,
  305. NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
  306. /* Handshake with the card before we register the devices. */
  307. netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
  308. /* initialize the all the ports */
  309. adapter->active_ports = 0;
  310. for (i = 0; i < adapter->ahw.max_ports; i++) {
  311. netdev = alloc_etherdev(sizeof(struct netxen_port));
  312. if (!netdev) {
  313. printk(KERN_ERR "%s: could not allocate netdev for port"
  314. " %d\n", netxen_nic_driver_name, i + 1);
  315. goto err_out_free_dev;
  316. }
  317. SET_MODULE_OWNER(netdev);
  318. SET_NETDEV_DEV(netdev, &pdev->dev);
  319. port = netdev_priv(netdev);
  320. port->netdev = netdev;
  321. port->pdev = pdev;
  322. port->adapter = adapter;
  323. port->portnum = i; /* Gigabit port number from 0-3 */
  324. netdev->open = netxen_nic_open;
  325. netdev->stop = netxen_nic_close;
  326. netdev->hard_start_xmit = netxen_nic_xmit_frame;
  327. netdev->get_stats = netxen_nic_get_stats;
  328. netdev->set_multicast_list = netxen_nic_set_multi;
  329. netdev->set_mac_address = netxen_nic_set_mac;
  330. netdev->change_mtu = netxen_nic_change_mtu;
  331. netdev->do_ioctl = netxen_nic_ioctl;
  332. netdev->tx_timeout = netxen_tx_timeout;
  333. netdev->watchdog_timeo = HZ;
  334. SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
  335. netdev->poll = netxen_nic_poll;
  336. netdev->weight = NETXEN_NETDEV_WEIGHT;
  337. #ifdef CONFIG_NET_POLL_CONTROLLER
  338. netdev->poll_controller = netxen_nic_poll_controller;
  339. #endif
  340. /* ScatterGather support */
  341. netdev->features = NETIF_F_SG;
  342. netdev->features |= NETIF_F_IP_CSUM;
  343. netdev->features |= NETIF_F_TSO;
  344. if (pci_using_dac)
  345. netdev->features |= NETIF_F_HIGHDMA;
  346. if (valid_mac) {
  347. unsigned char *p = (unsigned char *)&mac_addr[i];
  348. netdev->dev_addr[0] = *(p + 5);
  349. netdev->dev_addr[1] = *(p + 4);
  350. netdev->dev_addr[2] = *(p + 3);
  351. netdev->dev_addr[3] = *(p + 2);
  352. netdev->dev_addr[4] = *(p + 1);
  353. netdev->dev_addr[5] = *(p + 0);
  354. memcpy(netdev->perm_addr, netdev->dev_addr,
  355. netdev->addr_len);
  356. if (!is_valid_ether_addr(netdev->perm_addr)) {
  357. printk(KERN_ERR "%s: Bad MAC address "
  358. "%02x:%02x:%02x:%02x:%02x:%02x.\n",
  359. netxen_nic_driver_name,
  360. netdev->dev_addr[0],
  361. netdev->dev_addr[1],
  362. netdev->dev_addr[2],
  363. netdev->dev_addr[3],
  364. netdev->dev_addr[4],
  365. netdev->dev_addr[5]);
  366. } else {
  367. if (adapter->macaddr_set)
  368. adapter->macaddr_set(port,
  369. netdev->dev_addr);
  370. }
  371. }
  372. INIT_WORK(&port->tx_timeout_task, netxen_tx_timeout_task);
  373. netif_carrier_off(netdev);
  374. netif_stop_queue(netdev);
  375. if ((err = register_netdev(netdev))) {
  376. printk(KERN_ERR "%s: register_netdev failed port #%d"
  377. " aborting\n", netxen_nic_driver_name, i + 1);
  378. err = -EIO;
  379. free_netdev(netdev);
  380. goto err_out_free_dev;
  381. }
  382. adapter->port_count++;
  383. adapter->port[i] = port;
  384. }
  385. writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
  386. netxen_pinit_from_rom(adapter, 0);
  387. udelay(500);
  388. netxen_load_firmware(adapter);
  389. netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
  390. /*
  391. * delay a while to ensure that the Pegs are up & running.
  392. * Otherwise, we might see some flaky behaviour.
  393. */
  394. udelay(100);
  395. switch (adapter->ahw.board_type) {
  396. case NETXEN_NIC_GBE:
  397. printk("%s: QUAD GbE board initialized\n",
  398. netxen_nic_driver_name);
  399. break;
  400. case NETXEN_NIC_XGBE:
  401. printk("%s: XGbE board initialized\n", netxen_nic_driver_name);
  402. break;
  403. }
  404. adapter->driver_mismatch = 0;
  405. return 0;
  406. err_out_free_dev:
  407. if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
  408. pci_disable_msi(pdev);
  409. for (i = 0; i < adapter->port_count; i++) {
  410. port = adapter->port[i];
  411. if ((port) && (port->netdev)) {
  412. unregister_netdev(port->netdev);
  413. free_netdev(port->netdev);
  414. }
  415. }
  416. netxen_free_adapter_offload(adapter);
  417. err_out_free_rx_buffer:
  418. for (i = 0; i < MAX_RCV_CTX; ++i) {
  419. recv_ctx = &adapter->recv_ctx[i];
  420. for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
  421. rcv_desc = &recv_ctx->rcv_desc[ring];
  422. if (rcv_desc->rx_buf_arr != NULL) {
  423. vfree(rcv_desc->rx_buf_arr);
  424. rcv_desc->rx_buf_arr = NULL;
  425. }
  426. }
  427. }
  428. vfree(cmd_buf_arr);
  429. err_out_free_adapter:
  430. pci_set_drvdata(pdev, NULL);
  431. kfree(adapter);
  432. err_out_dbunmap:
  433. if (db_ptr)
  434. iounmap(db_ptr);
  435. err_out_iounmap:
  436. if (mem_ptr0)
  437. iounmap(mem_ptr0);
  438. if (mem_ptr1)
  439. iounmap(mem_ptr1);
  440. if (mem_ptr2)
  441. iounmap(mem_ptr2);
  442. err_out_free_res:
  443. pci_release_regions(pdev);
  444. err_out_disable_pdev:
  445. pci_disable_device(pdev);
  446. return err;
  447. }
  448. static void __devexit netxen_nic_remove(struct pci_dev *pdev)
  449. {
  450. struct netxen_adapter *adapter;
  451. struct netxen_port *port;
  452. struct netxen_rx_buffer *buffer;
  453. struct netxen_recv_context *recv_ctx;
  454. struct netxen_rcv_desc_ctx *rcv_desc;
  455. int i;
  456. int ctxid, ring;
  457. adapter = pci_get_drvdata(pdev);
  458. if (adapter == NULL)
  459. return;
  460. netxen_nic_stop_all_ports(adapter);
  461. /* leave the hw in the same state as reboot */
  462. netxen_pinit_from_rom(adapter, 0);
  463. writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
  464. netxen_load_firmware(adapter);
  465. netxen_free_adapter_offload(adapter);
  466. udelay(500); /* Delay for a while to drain the DMA engines */
  467. for (i = 0; i < adapter->port_count; i++) {
  468. port = adapter->port[i];
  469. if ((port) && (port->netdev)) {
  470. unregister_netdev(port->netdev);
  471. free_netdev(port->netdev);
  472. }
  473. }
  474. if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
  475. pci_disable_msi(pdev);
  476. pci_set_drvdata(pdev, NULL);
  477. if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
  478. netxen_free_hw_resources(adapter);
  479. iounmap(adapter->ahw.db_base);
  480. iounmap(adapter->ahw.pci_base0);
  481. iounmap(adapter->ahw.pci_base1);
  482. iounmap(adapter->ahw.pci_base2);
  483. pci_release_regions(pdev);
  484. pci_disable_device(pdev);
  485. for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
  486. recv_ctx = &adapter->recv_ctx[ctxid];
  487. for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
  488. rcv_desc = &recv_ctx->rcv_desc[ring];
  489. for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
  490. buffer = &(rcv_desc->rx_buf_arr[i]);
  491. if (buffer->state == NETXEN_BUFFER_FREE)
  492. continue;
  493. pci_unmap_single(pdev, buffer->dma,
  494. rcv_desc->dma_size,
  495. PCI_DMA_FROMDEVICE);
  496. if (buffer->skb != NULL)
  497. dev_kfree_skb_any(buffer->skb);
  498. }
  499. vfree(rcv_desc->rx_buf_arr);
  500. }
  501. }
  502. vfree(adapter->cmd_buf_arr);
  503. kfree(adapter);
  504. }
  505. /*
  506. * Called when a network interface is made active
  507. * @returns 0 on success, negative value on failure
  508. */
  509. static int netxen_nic_open(struct net_device *netdev)
  510. {
  511. struct netxen_port *port = netdev_priv(netdev);
  512. struct netxen_adapter *adapter = port->adapter;
  513. int err = 0;
  514. int ctx, ring;
  515. if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
  516. err = netxen_init_firmware(adapter);
  517. if (err != 0) {
  518. printk(KERN_ERR "Failed to init firmware\n");
  519. return -EIO;
  520. }
  521. netxen_nic_flash_print(adapter);
  522. if (adapter->init_niu)
  523. adapter->init_niu(adapter);
  524. /* setup all the resources for the Phantom... */
  525. /* this include the descriptors for rcv, tx, and status */
  526. netxen_nic_clear_stats(adapter);
  527. err = netxen_nic_hw_resources(adapter);
  528. if (err) {
  529. printk(KERN_ERR "Error in setting hw resources:%d\n",
  530. err);
  531. return err;
  532. }
  533. if (adapter->init_port
  534. && adapter->init_port(adapter, port->portnum) != 0) {
  535. printk(KERN_ERR "%s: Failed to initialize port %d\n",
  536. netxen_nic_driver_name, port->portnum);
  537. netxen_free_hw_resources(adapter);
  538. return -EIO;
  539. }
  540. for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
  541. for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
  542. netxen_post_rx_buffers(adapter, ctx, ring);
  543. }
  544. adapter->irq = adapter->ahw.pdev->irq;
  545. err = request_irq(adapter->ahw.pdev->irq, &netxen_intr,
  546. SA_SHIRQ | SA_SAMPLE_RANDOM, netdev->name,
  547. adapter);
  548. if (err) {
  549. printk(KERN_ERR "request_irq failed with: %d\n", err);
  550. netxen_free_hw_resources(adapter);
  551. return err;
  552. }
  553. adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
  554. }
  555. adapter->active_ports++;
  556. if (adapter->active_ports == 1) {
  557. if (!adapter->driver_mismatch)
  558. mod_timer(&adapter->watchdog_timer, jiffies);
  559. netxen_nic_enable_int(adapter);
  560. }
  561. /* Done here again so that even if phantom sw overwrote it,
  562. * we set it */
  563. if (adapter->macaddr_set)
  564. adapter->macaddr_set(port, netdev->dev_addr);
  565. netxen_nic_set_link_parameters(port);
  566. netxen_nic_set_multi(netdev);
  567. if (adapter->set_mtu)
  568. adapter->set_mtu(port, netdev->mtu);
  569. if (!adapter->driver_mismatch)
  570. netif_start_queue(netdev);
  571. return 0;
  572. }
  573. /*
  574. * netxen_nic_close - Disables a network interface entry point
  575. */
  576. static int netxen_nic_close(struct net_device *netdev)
  577. {
  578. struct netxen_port *port = netdev_priv(netdev);
  579. struct netxen_adapter *adapter = port->adapter;
  580. int i, j;
  581. struct netxen_cmd_buffer *cmd_buff;
  582. struct netxen_skb_frag *buffrag;
  583. netif_carrier_off(netdev);
  584. netif_stop_queue(netdev);
  585. adapter->active_ports--;
  586. if (!adapter->active_ports) {
  587. netxen_nic_disable_int(adapter);
  588. if (adapter->irq)
  589. free_irq(adapter->irq, adapter);
  590. cmd_buff = adapter->cmd_buf_arr;
  591. for (i = 0; i < adapter->max_tx_desc_count; i++) {
  592. buffrag = cmd_buff->frag_array;
  593. if (buffrag->dma) {
  594. pci_unmap_single(port->pdev, buffrag->dma,
  595. buffrag->length,
  596. PCI_DMA_TODEVICE);
  597. buffrag->dma = (u64) NULL;
  598. }
  599. for (j = 0; j < cmd_buff->frag_count; j++) {
  600. buffrag++;
  601. if (buffrag->dma) {
  602. pci_unmap_page(port->pdev,
  603. buffrag->dma,
  604. buffrag->length,
  605. PCI_DMA_TODEVICE);
  606. buffrag->dma = (u64) NULL;
  607. }
  608. }
  609. /* Free the skb we received in netxen_nic_xmit_frame */
  610. if (cmd_buff->skb) {
  611. dev_kfree_skb_any(cmd_buff->skb);
  612. cmd_buff->skb = NULL;
  613. }
  614. cmd_buff++;
  615. }
  616. FLUSH_SCHEDULED_WORK();
  617. del_timer_sync(&adapter->watchdog_timer);
  618. }
  619. return 0;
  620. }
  621. static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
  622. {
  623. struct netxen_port *port = netdev_priv(netdev);
  624. struct netxen_adapter *adapter = port->adapter;
  625. struct netxen_hardware_context *hw = &adapter->ahw;
  626. unsigned int first_seg_len = skb->len - skb->data_len;
  627. struct netxen_skb_frag *buffrag;
  628. unsigned int i;
  629. u32 producer = 0;
  630. u32 saved_producer = 0;
  631. struct cmd_desc_type0 *hwdesc;
  632. int k;
  633. struct netxen_cmd_buffer *pbuf = NULL;
  634. static int dropped_packet = 0;
  635. int frag_count;
  636. u32 local_producer = 0;
  637. u32 max_tx_desc_count = 0;
  638. u32 last_cmd_consumer = 0;
  639. int no_of_desc;
  640. port->stats.xmitcalled++;
  641. frag_count = skb_shinfo(skb)->nr_frags + 1;
  642. if (unlikely(skb->len <= 0)) {
  643. dev_kfree_skb_any(skb);
  644. port->stats.badskblen++;
  645. return NETDEV_TX_OK;
  646. }
  647. if (frag_count > MAX_BUFFERS_PER_CMD) {
  648. printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
  649. "too large, can handle only %d frags\n",
  650. netxen_nic_driver_name, netdev->name,
  651. frag_count, MAX_BUFFERS_PER_CMD);
  652. port->stats.txdropped++;
  653. if ((++dropped_packet & 0xff) == 0xff)
  654. printk("%s: %s droppped packets = %d\n",
  655. netxen_nic_driver_name, netdev->name,
  656. dropped_packet);
  657. return NETDEV_TX_OK;
  658. }
  659. /*
  660. * Everything is set up. Now, we just need to transmit it out.
  661. * Note that we have to copy the contents of buffer over to
  662. * right place. Later on, this can be optimized out by de-coupling the
  663. * producer index from the buffer index.
  664. */
  665. retry_getting_window:
  666. spin_lock_bh(&adapter->tx_lock);
  667. if (adapter->total_threads == MAX_XMIT_PRODUCERS) {
  668. spin_unlock_bh(&adapter->tx_lock);
  669. /*
  670. * Yield CPU
  671. */
  672. if (!in_atomic())
  673. schedule();
  674. else {
  675. for (i = 0; i < 20; i++)
  676. cpu_relax(); /*This a nop instr on i386 */
  677. }
  678. goto retry_getting_window;
  679. }
  680. local_producer = adapter->cmd_producer;
  681. /* There 4 fragments per descriptor */
  682. no_of_desc = (frag_count + 3) >> 2;
  683. if (netdev->features & NETIF_F_TSO) {
  684. if (skb_shinfo(skb)->gso_size > 0) {
  685. no_of_desc++;
  686. if (((skb->nh.iph)->ihl * sizeof(u32)) +
  687. ((skb->h.th)->doff * sizeof(u32)) +
  688. sizeof(struct ethhdr) >
  689. (sizeof(struct cmd_desc_type0) - 2)) {
  690. no_of_desc++;
  691. }
  692. }
  693. }
  694. k = adapter->cmd_producer;
  695. max_tx_desc_count = adapter->max_tx_desc_count;
  696. last_cmd_consumer = adapter->last_cmd_consumer;
  697. if ((k + no_of_desc) >=
  698. ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
  699. last_cmd_consumer)) {
  700. port->stats.nocmddescriptor++;
  701. DPRINTK(ERR, "No command descriptors available,"
  702. " producer = %d, consumer = %d count=%llu,"
  703. " dropping packet\n", producer,
  704. adapter->last_cmd_consumer,
  705. port->stats.nocmddescriptor);
  706. netif_stop_queue(netdev);
  707. port->flags |= NETXEN_NETDEV_STATUS;
  708. spin_unlock_bh(&adapter->tx_lock);
  709. return NETDEV_TX_BUSY;
  710. }
  711. k = get_index_range(k, max_tx_desc_count, no_of_desc);
  712. adapter->cmd_producer = k;
  713. adapter->total_threads++;
  714. adapter->num_threads++;
  715. spin_unlock_bh(&adapter->tx_lock);
  716. /* Copy the descriptors into the hardware */
  717. producer = local_producer;
  718. saved_producer = producer;
  719. hwdesc = &hw->cmd_desc_head[producer];
  720. memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
  721. /* Take skb->data itself */
  722. pbuf = &adapter->cmd_buf_arr[producer];
  723. if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
  724. pbuf->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
  725. hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
  726. } else {
  727. pbuf->mss = 0;
  728. hwdesc->mss = 0;
  729. }
  730. pbuf->total_length = skb->len;
  731. pbuf->skb = skb;
  732. pbuf->cmd = TX_ETHER_PKT;
  733. pbuf->frag_count = frag_count;
  734. pbuf->port = port->portnum;
  735. buffrag = &pbuf->frag_array[0];
  736. buffrag->dma = pci_map_single(port->pdev, skb->data, first_seg_len,
  737. PCI_DMA_TODEVICE);
  738. buffrag->length = first_seg_len;
  739. netxen_set_cmd_desc_totallength(hwdesc, skb->len);
  740. netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
  741. netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
  742. netxen_set_cmd_desc_port(hwdesc, port->portnum);
  743. hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
  744. hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
  745. for (i = 1, k = 1; i < frag_count; i++, k++) {
  746. struct skb_frag_struct *frag;
  747. int len, temp_len;
  748. unsigned long offset;
  749. dma_addr_t temp_dma;
  750. /* move to next desc. if there is a need */
  751. if ((i & 0x3) == 0) {
  752. k = 0;
  753. producer = get_next_index(producer,
  754. adapter->max_tx_desc_count);
  755. hwdesc = &hw->cmd_desc_head[producer];
  756. memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
  757. }
  758. frag = &skb_shinfo(skb)->frags[i - 1];
  759. len = frag->size;
  760. offset = frag->page_offset;
  761. temp_len = len;
  762. temp_dma = pci_map_page(port->pdev, frag->page, offset,
  763. len, PCI_DMA_TODEVICE);
  764. buffrag++;
  765. buffrag->dma = temp_dma;
  766. buffrag->length = temp_len;
  767. DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
  768. switch (k) {
  769. case 0:
  770. hwdesc->buffer1_length = cpu_to_le16(temp_len);
  771. hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
  772. break;
  773. case 1:
  774. hwdesc->buffer2_length = cpu_to_le16(temp_len);
  775. hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
  776. break;
  777. case 2:
  778. hwdesc->buffer3_length = cpu_to_le16(temp_len);
  779. hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
  780. break;
  781. case 3:
  782. hwdesc->buffer4_length = temp_len;
  783. hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
  784. break;
  785. }
  786. frag++;
  787. }
  788. producer = get_next_index(producer, adapter->max_tx_desc_count);
  789. /* might change opcode to TX_TCP_LSO */
  790. netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
  791. /* For LSO, we need to copy the MAC/IP/TCP headers into
  792. * the descriptor ring
  793. */
  794. if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
  795. == TX_TCP_LSO) {
  796. int hdr_len, first_hdr_len, more_hdr;
  797. hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
  798. if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
  799. first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
  800. more_hdr = 1;
  801. } else {
  802. first_hdr_len = hdr_len;
  803. more_hdr = 0;
  804. }
  805. /* copy the MAC/IP/TCP headers to the cmd descriptor list */
  806. hwdesc = &hw->cmd_desc_head[producer];
  807. /* copy the first 64 bytes */
  808. memcpy(((void *)hwdesc) + 2,
  809. (void *)(skb->data), first_hdr_len);
  810. producer = get_next_index(producer, max_tx_desc_count);
  811. if (more_hdr) {
  812. hwdesc = &hw->cmd_desc_head[producer];
  813. /* copy the next 64 bytes - should be enough except
  814. * for pathological case
  815. */
  816. memcpy((void *)hwdesc, (void *)(skb->data) +
  817. first_hdr_len, hdr_len - first_hdr_len);
  818. producer = get_next_index(producer, max_tx_desc_count);
  819. }
  820. }
  821. spin_lock_bh(&adapter->tx_lock);
  822. port->stats.txbytes +=
  823. netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
  824. /* Code to update the adapter considering how many producer threads
  825. are currently working */
  826. if ((--adapter->num_threads) == 0) {
  827. /* This is the last thread */
  828. u32 crb_producer = adapter->cmd_producer;
  829. writel(crb_producer,
  830. NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
  831. wmb();
  832. adapter->total_threads = 0;
  833. }
  834. port->stats.xmitfinished++;
  835. spin_unlock_bh(&adapter->tx_lock);
  836. netdev->trans_start = jiffies;
  837. DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
  838. DPRINTK(INFO, "Done. Send\n");
  839. return NETDEV_TX_OK;
  840. }
  841. static void netxen_watchdog(unsigned long v)
  842. {
  843. struct netxen_adapter *adapter = (struct netxen_adapter *)v;
  844. SCHEDULE_WORK(&adapter->watchdog_task);
  845. }
  846. static void netxen_tx_timeout(struct net_device *netdev)
  847. {
  848. struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
  849. SCHEDULE_WORK(&port->tx_timeout_task);
  850. }
  851. static void netxen_tx_timeout_task(struct work_struct *work)
  852. {
  853. struct netxen_port *port =
  854. container_of(work, struct netxen_port, tx_timeout_task);
  855. struct net_device *netdev = port->netdev;
  856. unsigned long flags;
  857. printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
  858. netxen_nic_driver_name, netdev->name);
  859. spin_lock_irqsave(&port->adapter->lock, flags);
  860. netxen_nic_close(netdev);
  861. netxen_nic_open(netdev);
  862. spin_unlock_irqrestore(&port->adapter->lock, flags);
  863. netdev->trans_start = jiffies;
  864. netif_wake_queue(netdev);
  865. }
  866. static int
  867. netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
  868. {
  869. u32 ret = 0;
  870. DPRINTK(INFO, "Entered handle ISR\n");
  871. adapter->stats.ints++;
  872. if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
  873. int count = 0;
  874. u32 mask;
  875. mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
  876. if ((mask & 0x80) == 0) {
  877. /* not our interrupt */
  878. return ret;
  879. }
  880. netxen_nic_disable_int(adapter);
  881. /* Window = 0 or 1 */
  882. do {
  883. writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
  884. ISR_INT_TARGET_STATUS));
  885. mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
  886. } while (((mask & 0x80) != 0) && (++count < 32));
  887. if ((mask & 0x80) != 0)
  888. printk("Could not disable interrupt completely\n");
  889. }
  890. adapter->stats.hostints++;
  891. if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
  892. if (netif_rx_schedule_prep(netdev)) {
  893. /*
  894. * Interrupts are already disabled.
  895. */
  896. __netif_rx_schedule(netdev);
  897. } else {
  898. static unsigned int intcount = 0;
  899. if ((++intcount & 0xfff) == 0xfff)
  900. printk(KERN_ERR
  901. "%s: %s interrupt %d while in poll\n",
  902. netxen_nic_driver_name, netdev->name,
  903. intcount);
  904. }
  905. ret = 1;
  906. }
  907. if (ret == 0) {
  908. netxen_nic_enable_int(adapter);
  909. }
  910. return ret;
  911. }
  912. /*
  913. * netxen_intr - Interrupt Handler
  914. * @irq: interrupt number
  915. * data points to adapter stucture (which may be handling more than 1 port
  916. */
  917. irqreturn_t netxen_intr(int irq, void *data)
  918. {
  919. struct netxen_adapter *adapter;
  920. struct netxen_port *port;
  921. struct net_device *netdev;
  922. int i;
  923. if (unlikely(!irq)) {
  924. return IRQ_NONE; /* Not our interrupt */
  925. }
  926. adapter = (struct netxen_adapter *)data;
  927. for (i = 0; i < adapter->ahw.max_ports; i++) {
  928. port = adapter->port[i];
  929. netdev = port->netdev;
  930. /* process our status queue (for all 4 ports) */
  931. if (netif_running(netdev)) {
  932. netxen_handle_int(adapter, netdev);
  933. break;
  934. }
  935. }
  936. return IRQ_HANDLED;
  937. }
  938. static int netxen_nic_poll(struct net_device *netdev, int *budget)
  939. {
  940. struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
  941. struct netxen_adapter *adapter = port->adapter;
  942. int work_to_do = min(*budget, netdev->quota);
  943. int done = 1;
  944. int ctx;
  945. int this_work_done;
  946. int work_done = 0;
  947. DPRINTK(INFO, "polling for %d descriptors\n", *budget);
  948. port->stats.polled++;
  949. work_done = 0;
  950. for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
  951. /*
  952. * Fairness issue. This will give undue weight to the
  953. * receive context 0.
  954. */
  955. /*
  956. * To avoid starvation, we give each of our receivers,
  957. * a fraction of the quota. Sometimes, it might happen that we
  958. * have enough quota to process every packet, but since all the
  959. * packets are on one context, it gets only half of the quota,
  960. * and ends up not processing it.
  961. */
  962. this_work_done = netxen_process_rcv_ring(adapter, ctx,
  963. work_to_do /
  964. MAX_RCV_CTX);
  965. work_done += this_work_done;
  966. }
  967. netdev->quota -= work_done;
  968. *budget -= work_done;
  969. if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
  970. done = 0;
  971. if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
  972. done = 0;
  973. DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
  974. work_done, work_to_do);
  975. if (done) {
  976. netif_rx_complete(netdev);
  977. netxen_nic_enable_int(adapter);
  978. }
  979. return !done;
  980. }
  981. #ifdef CONFIG_NET_POLL_CONTROLLER
  982. static void netxen_nic_poll_controller(struct net_device *netdev)
  983. {
  984. struct netxen_port *port = netdev_priv(netdev);
  985. struct netxen_adapter *adapter = port->adapter;
  986. disable_irq(adapter->irq);
  987. netxen_intr(adapter->irq, adapter);
  988. enable_irq(adapter->irq);
  989. }
  990. #endif
  991. /*
  992. * netxen_nic_ioctl () We provide the tcl/phanmon support through these
  993. * ioctls.
  994. */
  995. static int
  996. netxen_nic_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
  997. {
  998. int err = 0;
  999. unsigned long nr_bytes = 0;
  1000. struct netxen_port *port = netdev_priv(netdev);
  1001. struct netxen_adapter *adapter = port->adapter;
  1002. char dev_name[NETXEN_NIC_NAME_LEN];
  1003. DPRINTK(INFO, "doing ioctl for %s\n", netdev->name);
  1004. switch (cmd) {
  1005. case NETXEN_NIC_CMD:
  1006. err = netxen_nic_do_ioctl(adapter, (void *)ifr->ifr_data, port);
  1007. break;
  1008. case NETXEN_NIC_NAME:
  1009. DPRINTK(INFO, "ioctl cmd for NetXen\n");
  1010. if (ifr->ifr_data) {
  1011. sprintf(dev_name, "%s-%d", NETXEN_NIC_NAME_RSP,
  1012. port->portnum);
  1013. nr_bytes =
  1014. copy_to_user((char __user *)ifr->ifr_data, dev_name,
  1015. NETXEN_NIC_NAME_LEN);
  1016. if (nr_bytes)
  1017. err = -EIO;
  1018. }
  1019. break;
  1020. default:
  1021. DPRINTK(INFO, "ioctl cmd %x not supported\n", cmd);
  1022. err = -EOPNOTSUPP;
  1023. break;
  1024. }
  1025. return err;
  1026. }
  1027. static struct pci_driver netxen_driver = {
  1028. .name = netxen_nic_driver_name,
  1029. .id_table = netxen_pci_tbl,
  1030. .probe = netxen_nic_probe,
  1031. .remove = __devexit_p(netxen_nic_remove)
  1032. };
  1033. /* Driver Registration on NetXen card */
  1034. static int __init netxen_init_module(void)
  1035. {
  1036. if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
  1037. return -ENOMEM;
  1038. return pci_module_init(&netxen_driver);
  1039. }
  1040. module_init(netxen_init_module);
  1041. static void __exit netxen_exit_module(void)
  1042. {
  1043. /*
  1044. * Wait for some time to allow the dma to drain, if any.
  1045. */
  1046. destroy_workqueue(netxen_workq);
  1047. pci_unregister_driver(&netxen_driver);
  1048. }
  1049. module_exit(netxen_exit_module);