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netxen: remove low level tx lock
[deliverable/linux.git] / drivers / net / netxen / netxen_nic_main.c
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
34 #include <linux/vmalloc.h>
35 #include <linux/highmem.h>
36 #include "netxen_nic_hw.h"
37
38 #include "netxen_nic.h"
39 #include "netxen_nic_phan_reg.h"
40
41 #include <linux/dma-mapping.h>
42 #include <net/ip.h>
43
44 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
45 MODULE_LICENSE("GPL");
46 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
47
48 char netxen_nic_driver_name[] = "netxen_nic";
49 static char netxen_nic_driver_string[] = "NetXen Network Driver version "
50 NETXEN_NIC_LINUX_VERSIONID;
51
52 #define NETXEN_NETDEV_WEIGHT 120
53 #define NETXEN_ADAPTER_UP_MAGIC 777
54 #define NETXEN_NIC_PEG_TUNE 0
55
56 /* Local functions to NetXen NIC driver */
57 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
58 const struct pci_device_id *ent);
59 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
60 static int netxen_nic_open(struct net_device *netdev);
61 static int netxen_nic_close(struct net_device *netdev);
62 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
63 static void netxen_tx_timeout(struct net_device *netdev);
64 static void netxen_tx_timeout_task(struct work_struct *work);
65 static void netxen_watchdog(unsigned long);
66 static int netxen_nic_poll(struct napi_struct *napi, int budget);
67 #ifdef CONFIG_NET_POLL_CONTROLLER
68 static void netxen_nic_poll_controller(struct net_device *netdev);
69 #endif
70 static irqreturn_t netxen_intr(int irq, void *data);
71 static irqreturn_t netxen_msi_intr(int irq, void *data);
72
73 int physical_port[] = {0, 1, 2, 3};
74
75 /* PCI Device ID Table */
76 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
77 {PCI_DEVICE(0x4040, 0x0001)},
78 {PCI_DEVICE(0x4040, 0x0002)},
79 {PCI_DEVICE(0x4040, 0x0003)},
80 {PCI_DEVICE(0x4040, 0x0004)},
81 {PCI_DEVICE(0x4040, 0x0005)},
82 {PCI_DEVICE(0x4040, 0x0024)},
83 {PCI_DEVICE(0x4040, 0x0025)},
84 {0,}
85 };
86
87 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
88
89 struct workqueue_struct *netxen_workq;
90 static void netxen_watchdog(unsigned long);
91
92 static void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
93 uint32_t crb_producer)
94 {
95 switch (adapter->portnum) {
96 case 0:
97 writel(crb_producer, NETXEN_CRB_NORMALIZE
98 (adapter, CRB_CMD_PRODUCER_OFFSET));
99 return;
100 case 1:
101 writel(crb_producer, NETXEN_CRB_NORMALIZE
102 (adapter, CRB_CMD_PRODUCER_OFFSET_1));
103 return;
104 case 2:
105 writel(crb_producer, NETXEN_CRB_NORMALIZE
106 (adapter, CRB_CMD_PRODUCER_OFFSET_2));
107 return;
108 case 3:
109 writel(crb_producer, NETXEN_CRB_NORMALIZE
110 (adapter, CRB_CMD_PRODUCER_OFFSET_3));
111 return;
112 default:
113 printk(KERN_WARNING "We tried to update "
114 "CRB_CMD_PRODUCER_OFFSET for invalid "
115 "PCI function id %d\n",
116 adapter->portnum);
117 return;
118 }
119 }
120
121 static void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
122 u32 crb_consumer)
123 {
124 switch (adapter->portnum) {
125 case 0:
126 writel(crb_consumer, NETXEN_CRB_NORMALIZE
127 (adapter, CRB_CMD_CONSUMER_OFFSET));
128 return;
129 case 1:
130 writel(crb_consumer, NETXEN_CRB_NORMALIZE
131 (adapter, CRB_CMD_CONSUMER_OFFSET_1));
132 return;
133 case 2:
134 writel(crb_consumer, NETXEN_CRB_NORMALIZE
135 (adapter, CRB_CMD_CONSUMER_OFFSET_2));
136 return;
137 case 3:
138 writel(crb_consumer, NETXEN_CRB_NORMALIZE
139 (adapter, CRB_CMD_CONSUMER_OFFSET_3));
140 return;
141 default:
142 printk(KERN_WARNING "We tried to update "
143 "CRB_CMD_PRODUCER_OFFSET for invalid "
144 "PCI function id %d\n",
145 adapter->portnum);
146 return;
147 }
148 }
149
150 #define ADAPTER_LIST_SIZE 12
151
152 static uint32_t msi_tgt_status[4] = {
153 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
154 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3
155 };
156
157 static uint32_t sw_int_mask[4] = {
158 CRB_SW_INT_MASK_0, CRB_SW_INT_MASK_1,
159 CRB_SW_INT_MASK_2, CRB_SW_INT_MASK_3
160 };
161
162 static void netxen_nic_disable_int(struct netxen_adapter *adapter)
163 {
164 u32 mask = 0x7ff;
165 int retries = 32;
166 int port = adapter->portnum;
167 int pci_fn = adapter->ahw.pci_func;
168
169 if (adapter->msi_mode != MSI_MODE_MULTIFUNC) {
170 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
171 }
172
173 if (adapter->intr_scheme != -1 &&
174 adapter->intr_scheme != INTR_SCHEME_PERPORT)
175 writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
176
177 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
178 do {
179 writel(0xffffffff,
180 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
181 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
182 if (!(mask & 0x80))
183 break;
184 udelay(10);
185 } while (--retries);
186
187 if (!retries) {
188 printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
189 netxen_nic_driver_name);
190 }
191 } else {
192 if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
193 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
194 msi_tgt_status[pci_fn]));
195 }
196 }
197 }
198
199 static void netxen_nic_enable_int(struct netxen_adapter *adapter)
200 {
201 u32 mask;
202 int port = adapter->portnum;
203
204 DPRINTK(1, INFO, "Entered ISR Enable \n");
205
206 if (adapter->intr_scheme != -1 &&
207 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
208 switch (adapter->ahw.board_type) {
209 case NETXEN_NIC_GBE:
210 mask = 0x77b;
211 break;
212 case NETXEN_NIC_XGBE:
213 mask = 0x77f;
214 break;
215 default:
216 mask = 0x7ff;
217 break;
218 }
219
220 writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
221 }
222
223 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
224
225 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
226 mask = 0xbff;
227 if (adapter->intr_scheme != -1 &&
228 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
229 writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
230 }
231 writel(mask,
232 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
233 }
234
235 DPRINTK(1, INFO, "Done with enable Int\n");
236 }
237
238 /*
239 * netxen_nic_probe()
240 *
241 * The Linux system will invoke this after identifying the vendor ID and
242 * device Id in the pci_tbl supported by this module.
243 *
244 * A quad port card has one operational PCI config space, (function 0),
245 * which is used to access all four ports.
246 *
247 * This routine will initialize the adapter, and setup the global parameters
248 * along with the port's specific structure.
249 */
250 static int __devinit
251 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
252 {
253 struct net_device *netdev = NULL;
254 struct netxen_adapter *adapter = NULL;
255 void __iomem *mem_ptr0 = NULL;
256 void __iomem *mem_ptr1 = NULL;
257 void __iomem *mem_ptr2 = NULL;
258 unsigned long first_page_group_end;
259 unsigned long first_page_group_start;
260
261
262 u8 __iomem *db_ptr = NULL;
263 unsigned long mem_base, mem_len, db_base, db_len;
264 int pci_using_dac, i = 0, err;
265 int ring;
266 struct netxen_recv_context *recv_ctx = NULL;
267 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
268 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
269 __le64 mac_addr[FLASH_NUM_PORTS + 1];
270 int valid_mac = 0;
271 u32 val;
272 int pci_func_id = PCI_FUNC(pdev->devfn);
273 DECLARE_MAC_BUF(mac);
274
275 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
276
277 if (pdev->class != 0x020000) {
278 printk(KERN_ERR"NetXen function %d, class %x will not "
279 "be enabled.\n",pci_func_id, pdev->class);
280 return -ENODEV;
281 }
282 if ((err = pci_enable_device(pdev)))
283 return err;
284 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
285 err = -ENODEV;
286 goto err_out_disable_pdev;
287 }
288
289 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
290 goto err_out_disable_pdev;
291
292 pci_set_master(pdev);
293 if (pdev->revision == NX_P2_C1 &&
294 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
295 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
296 pci_using_dac = 1;
297 } else {
298 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
299 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
300 goto err_out_free_res;
301
302 pci_using_dac = 0;
303 }
304
305
306 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
307 if(!netdev) {
308 printk(KERN_ERR"%s: Failed to allocate memory for the "
309 "device block.Check system memory resource"
310 " usage.\n", netxen_nic_driver_name);
311 goto err_out_free_res;
312 }
313
314 SET_NETDEV_DEV(netdev, &pdev->dev);
315
316 adapter = netdev->priv;
317
318 adapter->ahw.pdev = pdev;
319 adapter->ahw.pci_func = pci_func_id;
320
321 /* remap phys address */
322 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
323 mem_len = pci_resource_len(pdev, 0);
324
325 /* 128 Meg of memory */
326 if (mem_len == NETXEN_PCI_128MB_SIZE) {
327 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
328 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
329 SECOND_PAGE_GROUP_SIZE);
330 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
331 THIRD_PAGE_GROUP_SIZE);
332 first_page_group_start = FIRST_PAGE_GROUP_START;
333 first_page_group_end = FIRST_PAGE_GROUP_END;
334 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
335 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
336 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
337 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
338 first_page_group_start = 0;
339 first_page_group_end = 0;
340 } else {
341 err = -EIO;
342 goto err_out_free_netdev;
343 }
344
345 if ((!mem_ptr0 && mem_len == NETXEN_PCI_128MB_SIZE) ||
346 !mem_ptr1 || !mem_ptr2) {
347 DPRINTK(ERR,
348 "Cannot remap adapter memory aborting.:"
349 "0 -> %p, 1 -> %p, 2 -> %p\n",
350 mem_ptr0, mem_ptr1, mem_ptr2);
351
352 err = -EIO;
353 goto err_out_iounmap;
354 }
355 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
356 db_len = pci_resource_len(pdev, 4);
357
358 if (db_len == 0) {
359 printk(KERN_ERR "%s: doorbell is disabled\n",
360 netxen_nic_driver_name);
361 err = -EIO;
362 goto err_out_iounmap;
363 }
364 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
365 db_len);
366
367 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
368 if (!db_ptr) {
369 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
370 netxen_nic_driver_name);
371 err = -EIO;
372 goto err_out_iounmap;
373 }
374 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
375
376 adapter->ahw.pci_base0 = mem_ptr0;
377 adapter->ahw.first_page_group_start = first_page_group_start;
378 adapter->ahw.first_page_group_end = first_page_group_end;
379 adapter->ahw.pci_base1 = mem_ptr1;
380 adapter->ahw.pci_base2 = mem_ptr2;
381 adapter->ahw.db_base = db_ptr;
382 adapter->ahw.db_len = db_len;
383
384 adapter->netdev = netdev;
385 adapter->pdev = pdev;
386
387 netif_napi_add(netdev, &adapter->napi,
388 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
389
390 /* this will be read from FW later */
391 adapter->intr_scheme = -1;
392 adapter->msi_mode = -1;
393
394 /* This will be reset for mezz cards */
395 adapter->portnum = pci_func_id;
396 adapter->status &= ~NETXEN_NETDEV_STATUS;
397 adapter->rx_csum = 1;
398
399 netdev->open = netxen_nic_open;
400 netdev->stop = netxen_nic_close;
401 netdev->hard_start_xmit = netxen_nic_xmit_frame;
402 netdev->get_stats = netxen_nic_get_stats;
403 netdev->set_multicast_list = netxen_nic_set_multi;
404 netdev->set_mac_address = netxen_nic_set_mac;
405 netdev->change_mtu = netxen_nic_change_mtu;
406 netdev->tx_timeout = netxen_tx_timeout;
407 netdev->watchdog_timeo = 2*HZ;
408
409 netxen_nic_change_mtu(netdev, netdev->mtu);
410
411 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
412 #ifdef CONFIG_NET_POLL_CONTROLLER
413 netdev->poll_controller = netxen_nic_poll_controller;
414 #endif
415 /* ScatterGather support */
416 netdev->features = NETIF_F_SG;
417 netdev->features |= NETIF_F_IP_CSUM;
418 netdev->features |= NETIF_F_TSO;
419
420 if (pci_using_dac)
421 netdev->features |= NETIF_F_HIGHDMA;
422
423 if (pci_enable_msi(pdev))
424 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
425 else
426 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
427
428 netdev->irq = pdev->irq;
429 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
430
431 /*
432 * Set the CRB window to invalid. If any register in window 0 is
433 * accessed it should set the window to 0 and then reset it to 1.
434 */
435 adapter->curr_window = 255;
436
437 /* initialize the adapter */
438 netxen_initialize_adapter_hw(adapter);
439
440 /*
441 * Adapter in our case is quad port so initialize it before
442 * initializing the ports
443 */
444
445 netxen_initialize_adapter_ops(adapter);
446
447 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
448 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
449 (adapter->ahw.boardcfg.board_type ==
450 NETXEN_BRDTYPE_P2_SB31_2G))
451 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
452 else
453 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
454 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
455 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
456
457 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
458 if (cmd_buf_arr == NULL) {
459 printk(KERN_ERR
460 "%s: Could not allocate cmd_buf_arr memory:%d\n",
461 netxen_nic_driver_name, (int)TX_RINGSIZE);
462 err = -ENOMEM;
463 goto err_out_free_adapter;
464 }
465 memset(cmd_buf_arr, 0, TX_RINGSIZE);
466 adapter->cmd_buf_arr = cmd_buf_arr;
467
468 for (i = 0; i < MAX_RCV_CTX; ++i) {
469 recv_ctx = &adapter->recv_ctx[i];
470 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
471 rcv_desc = &recv_ctx->rcv_desc[ring];
472 switch (RCV_DESC_TYPE(ring)) {
473 case RCV_DESC_NORMAL:
474 rcv_desc->max_rx_desc_count =
475 adapter->max_rx_desc_count;
476 rcv_desc->flags = RCV_DESC_NORMAL;
477 rcv_desc->dma_size = RX_DMA_MAP_LEN;
478 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
479 break;
480
481 case RCV_DESC_JUMBO:
482 rcv_desc->max_rx_desc_count =
483 adapter->max_jumbo_rx_desc_count;
484 rcv_desc->flags = RCV_DESC_JUMBO;
485 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
486 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
487 break;
488
489 case RCV_RING_LRO:
490 rcv_desc->max_rx_desc_count =
491 adapter->max_lro_rx_desc_count;
492 rcv_desc->flags = RCV_DESC_LRO;
493 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
494 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
495 break;
496
497 }
498 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
499 vmalloc(RCV_BUFFSIZE);
500
501 if (rcv_desc->rx_buf_arr == NULL) {
502 printk(KERN_ERR "%s: Could not allocate "
503 "rcv_desc->rx_buf_arr memory:%d\n",
504 netxen_nic_driver_name,
505 (int)RCV_BUFFSIZE);
506 err = -ENOMEM;
507 goto err_out_free_rx_buffer;
508 }
509 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
510 }
511
512 }
513
514 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
515
516 /* Mezz cards have PCI function 0,2,3 enabled */
517 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
518 && (pci_func_id >= 2))
519 adapter->portnum = pci_func_id - 2;
520
521 #ifdef CONFIG_IA64
522 if(adapter->portnum == 0) {
523 netxen_pinit_from_rom(adapter, 0);
524 udelay(500);
525 netxen_load_firmware(adapter);
526 }
527 #endif
528
529 init_timer(&adapter->watchdog_timer);
530 adapter->ahw.xg_linkup = 0;
531 adapter->watchdog_timer.function = &netxen_watchdog;
532 adapter->watchdog_timer.data = (unsigned long)adapter;
533 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
534 adapter->ahw.pdev = pdev;
535 adapter->ahw.revision_id = pdev->revision;
536
537 /* make sure Window == 1 */
538 netxen_nic_pci_change_crbwindow(adapter, 1);
539
540 netxen_nic_update_cmd_producer(adapter, 0);
541 netxen_nic_update_cmd_consumer(adapter, 0);
542 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
543
544 if (netxen_is_flash_supported(adapter) == 0 &&
545 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
546 valid_mac = 1;
547 else
548 valid_mac = 0;
549
550 if (valid_mac) {
551 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
552 netdev->dev_addr[0] = *(p + 5);
553 netdev->dev_addr[1] = *(p + 4);
554 netdev->dev_addr[2] = *(p + 3);
555 netdev->dev_addr[3] = *(p + 2);
556 netdev->dev_addr[4] = *(p + 1);
557 netdev->dev_addr[5] = *(p + 0);
558
559 memcpy(netdev->perm_addr, netdev->dev_addr,
560 netdev->addr_len);
561 if (!is_valid_ether_addr(netdev->perm_addr)) {
562 printk(KERN_ERR "%s: Bad MAC address %s.\n",
563 netxen_nic_driver_name,
564 print_mac(mac, netdev->dev_addr));
565 } else {
566 if (adapter->macaddr_set)
567 adapter->macaddr_set(adapter,
568 netdev->dev_addr);
569 }
570 }
571
572 if (adapter->portnum == 0) {
573 err = netxen_initialize_adapter_offload(adapter);
574 if (err)
575 goto err_out_free_rx_buffer;
576 val = readl(NETXEN_CRB_NORMALIZE(adapter,
577 NETXEN_CAM_RAM(0x1fc)));
578 if (val == 0x55555555) {
579 /* This is the first boot after power up */
580 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
581 if (!(val & 0x4)) {
582 val |= 0x4;
583 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
584 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
585 if (!(val & 0x4))
586 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
587 netxen_nic_driver_name);
588 }
589 val = readl(NETXEN_CRB_NORMALIZE(adapter,
590 NETXEN_ROMUSB_GLB_SW_RESET));
591 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
592 if (val != 0x80000f) {
593 /* clear the register for future unloads/loads */
594 writel(0, NETXEN_CRB_NORMALIZE(adapter,
595 NETXEN_CAM_RAM(0x1fc)));
596 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
597 err = -ENODEV;
598 goto err_out_free_dev;
599 }
600 }
601
602 /* clear the register for future unloads/loads */
603 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
604 printk(KERN_INFO "State: 0x%0x\n",
605 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
606
607 /*
608 * Tell the hardware our version number.
609 */
610 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
611 | ((_NETXEN_NIC_LINUX_MINOR << 8))
612 | (_NETXEN_NIC_LINUX_SUBVERSION);
613 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
614
615 /* Unlock the HW, prompting the boot sequence */
616 writel(1,
617 NETXEN_CRB_NORMALIZE(adapter,
618 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
619 /* Handshake with the card before we register the devices. */
620 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
621 }
622
623 /*
624 * See if the firmware gave us a virtual-physical port mapping.
625 */
626 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
627 if (i != 0x55555555)
628 physical_port[adapter->portnum] = i;
629
630 netif_carrier_off(netdev);
631 netif_stop_queue(netdev);
632
633 if ((err = register_netdev(netdev))) {
634 printk(KERN_ERR "%s: register_netdev failed port #%d"
635 " aborting\n", netxen_nic_driver_name,
636 adapter->portnum);
637 err = -EIO;
638 goto err_out_free_dev;
639 }
640
641 pci_set_drvdata(pdev, adapter);
642
643 switch (adapter->ahw.board_type) {
644 case NETXEN_NIC_GBE:
645 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
646 netxen_nic_driver_name);
647 break;
648
649 case NETXEN_NIC_XGBE:
650 printk(KERN_INFO "%s: XGbE board initialized\n",
651 netxen_nic_driver_name);
652 break;
653 }
654
655 adapter->driver_mismatch = 0;
656
657 return 0;
658
659 err_out_free_dev:
660 if (adapter->portnum == 0)
661 netxen_free_adapter_offload(adapter);
662
663 err_out_free_rx_buffer:
664 for (i = 0; i < MAX_RCV_CTX; ++i) {
665 recv_ctx = &adapter->recv_ctx[i];
666 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
667 rcv_desc = &recv_ctx->rcv_desc[ring];
668 if (rcv_desc->rx_buf_arr != NULL) {
669 vfree(rcv_desc->rx_buf_arr);
670 rcv_desc->rx_buf_arr = NULL;
671 }
672 }
673 }
674 vfree(cmd_buf_arr);
675
676 err_out_free_adapter:
677 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
678 pci_disable_msi(pdev);
679
680 pci_set_drvdata(pdev, NULL);
681
682 if (db_ptr)
683 iounmap(db_ptr);
684
685 err_out_iounmap:
686 if (mem_ptr0)
687 iounmap(mem_ptr0);
688 if (mem_ptr1)
689 iounmap(mem_ptr1);
690 if (mem_ptr2)
691 iounmap(mem_ptr2);
692
693 err_out_free_netdev:
694 free_netdev(netdev);
695
696 err_out_free_res:
697 pci_release_regions(pdev);
698
699 err_out_disable_pdev:
700 pci_disable_device(pdev);
701 return err;
702 }
703
704 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
705 {
706 struct netxen_adapter *adapter;
707 struct net_device *netdev;
708 struct netxen_rx_buffer *buffer;
709 struct netxen_recv_context *recv_ctx;
710 struct netxen_rcv_desc_ctx *rcv_desc;
711 int i, ctxid, ring;
712 static int init_firmware_done = 0;
713
714 adapter = pci_get_drvdata(pdev);
715 if (adapter == NULL)
716 return;
717
718 netdev = adapter->netdev;
719
720 unregister_netdev(netdev);
721
722 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
723 init_firmware_done++;
724 netxen_free_hw_resources(adapter);
725 }
726
727 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
728 recv_ctx = &adapter->recv_ctx[ctxid];
729 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
730 rcv_desc = &recv_ctx->rcv_desc[ring];
731 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
732 buffer = &(rcv_desc->rx_buf_arr[i]);
733 if (buffer->state == NETXEN_BUFFER_FREE)
734 continue;
735 pci_unmap_single(pdev, buffer->dma,
736 rcv_desc->dma_size,
737 PCI_DMA_FROMDEVICE);
738 if (buffer->skb != NULL)
739 dev_kfree_skb_any(buffer->skb);
740 }
741 vfree(rcv_desc->rx_buf_arr);
742 }
743 }
744
745 vfree(adapter->cmd_buf_arr);
746
747 if (adapter->portnum == 0) {
748 if (init_firmware_done) {
749 i = 100;
750 do {
751 if (dma_watchdog_shutdown_request(adapter) == 1)
752 break;
753 msleep(100);
754 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
755 break;
756 } while (--i);
757
758 if (i == 0)
759 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
760 netdev->name);
761
762 /* clear the register for future unloads/loads */
763 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
764 printk(KERN_INFO "State: 0x%0x\n",
765 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
766
767 /* leave the hw in the same state as reboot */
768 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
769 netxen_pinit_from_rom(adapter, 0);
770 msleep(1);
771 netxen_load_firmware(adapter);
772 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
773 }
774
775 /* clear the register for future unloads/loads */
776 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
777 printk(KERN_INFO "State: 0x%0x\n",
778 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
779
780 i = 100;
781 do {
782 if (dma_watchdog_shutdown_request(adapter) == 1)
783 break;
784 msleep(100);
785 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
786 break;
787 } while (--i);
788
789 if (i) {
790 netxen_free_adapter_offload(adapter);
791 } else {
792 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
793 netdev->name);
794 }
795 }
796
797 if (adapter->irq)
798 free_irq(adapter->irq, adapter);
799
800 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
801 pci_disable_msi(pdev);
802
803 iounmap(adapter->ahw.db_base);
804 iounmap(adapter->ahw.pci_base0);
805 iounmap(adapter->ahw.pci_base1);
806 iounmap(adapter->ahw.pci_base2);
807
808 pci_release_regions(pdev);
809 pci_disable_device(pdev);
810 pci_set_drvdata(pdev, NULL);
811
812 free_netdev(netdev);
813 }
814
815 /*
816 * Called when a network interface is made active
817 * @returns 0 on success, negative value on failure
818 */
819 static int netxen_nic_open(struct net_device *netdev)
820 {
821 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
822 int err = 0;
823 int ctx, ring;
824 irq_handler_t handler;
825 unsigned long flags = IRQF_SAMPLE_RANDOM;
826
827 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
828 err = netxen_init_firmware(adapter);
829 if (err != 0) {
830 printk(KERN_ERR "Failed to init firmware\n");
831 return -EIO;
832 }
833 netxen_nic_flash_print(adapter);
834
835 /* setup all the resources for the Phantom... */
836 /* this include the descriptors for rcv, tx, and status */
837 netxen_nic_clear_stats(adapter);
838 err = netxen_nic_hw_resources(adapter);
839 if (err) {
840 printk(KERN_ERR "Error in setting hw resources:%d\n",
841 err);
842 return err;
843 }
844 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
845 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
846 netxen_post_rx_buffers(adapter, ctx, ring);
847 }
848 adapter->irq = adapter->ahw.pdev->irq;
849 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
850 handler = netxen_msi_intr;
851 else {
852 flags |= IRQF_SHARED;
853 handler = netxen_intr;
854 }
855 err = request_irq(adapter->irq, handler,
856 flags, netdev->name, adapter);
857 if (err) {
858 printk(KERN_ERR "request_irq failed with: %d\n", err);
859 netxen_free_hw_resources(adapter);
860 return err;
861 }
862
863 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
864 }
865 /* Done here again so that even if phantom sw overwrote it,
866 * we set it */
867 if (adapter->init_port
868 && adapter->init_port(adapter, adapter->portnum) != 0) {
869 printk(KERN_ERR "%s: Failed to initialize port %d\n",
870 netxen_nic_driver_name, adapter->portnum);
871 return -EIO;
872 }
873 if (adapter->macaddr_set)
874 adapter->macaddr_set(adapter, netdev->dev_addr);
875
876 netxen_nic_set_link_parameters(adapter);
877
878 netxen_nic_set_multi(netdev);
879 if (adapter->set_mtu)
880 adapter->set_mtu(adapter, netdev->mtu);
881
882 if (!adapter->driver_mismatch)
883 mod_timer(&adapter->watchdog_timer, jiffies);
884
885 napi_enable(&adapter->napi);
886 netxen_nic_enable_int(adapter);
887
888 if (!adapter->driver_mismatch)
889 netif_start_queue(netdev);
890
891 return 0;
892 }
893
894 /*
895 * netxen_nic_close - Disables a network interface entry point
896 */
897 static int netxen_nic_close(struct net_device *netdev)
898 {
899 struct netxen_adapter *adapter = netdev_priv(netdev);
900 int i, j;
901 struct netxen_cmd_buffer *cmd_buff;
902 struct netxen_skb_frag *buffrag;
903
904 netif_carrier_off(netdev);
905 netif_stop_queue(netdev);
906 napi_disable(&adapter->napi);
907
908 if (adapter->stop_port)
909 adapter->stop_port(adapter);
910
911 netxen_nic_disable_int(adapter);
912
913 cmd_buff = adapter->cmd_buf_arr;
914 for (i = 0; i < adapter->max_tx_desc_count; i++) {
915 buffrag = cmd_buff->frag_array;
916 if (buffrag->dma) {
917 pci_unmap_single(adapter->pdev, buffrag->dma,
918 buffrag->length, PCI_DMA_TODEVICE);
919 buffrag->dma = 0ULL;
920 }
921 for (j = 0; j < cmd_buff->frag_count; j++) {
922 buffrag++;
923 if (buffrag->dma) {
924 pci_unmap_page(adapter->pdev, buffrag->dma,
925 buffrag->length,
926 PCI_DMA_TODEVICE);
927 buffrag->dma = 0ULL;
928 }
929 }
930 /* Free the skb we received in netxen_nic_xmit_frame */
931 if (cmd_buff->skb) {
932 dev_kfree_skb_any(cmd_buff->skb);
933 cmd_buff->skb = NULL;
934 }
935 cmd_buff++;
936 }
937 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
938 FLUSH_SCHEDULED_WORK();
939 del_timer_sync(&adapter->watchdog_timer);
940 }
941
942 return 0;
943 }
944
945 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
946 {
947 struct netxen_adapter *adapter = netdev_priv(netdev);
948 struct netxen_hardware_context *hw = &adapter->ahw;
949 unsigned int first_seg_len = skb->len - skb->data_len;
950 struct netxen_skb_frag *buffrag;
951 unsigned int i;
952
953 u32 producer, consumer;
954 u32 saved_producer = 0;
955 struct cmd_desc_type0 *hwdesc;
956 int k;
957 struct netxen_cmd_buffer *pbuf = NULL;
958 int frag_count;
959 int no_of_desc;
960 u32 num_txd = adapter->max_tx_desc_count;
961
962 frag_count = skb_shinfo(skb)->nr_frags + 1;
963
964 /* There 4 fragments per descriptor */
965 no_of_desc = (frag_count + 3) >> 2;
966 if (netdev->features & NETIF_F_TSO) {
967 if (skb_shinfo(skb)->gso_size > 0) {
968
969 no_of_desc++;
970 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
971 sizeof(struct ethhdr)) >
972 (sizeof(struct cmd_desc_type0) - 2)) {
973 no_of_desc++;
974 }
975 }
976 }
977
978 producer = adapter->cmd_producer;
979 smp_mb();
980 consumer = adapter->last_cmd_consumer;
981 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
982 netif_stop_queue(netdev);
983 smp_mb();
984 return NETDEV_TX_BUSY;
985 }
986
987 /* Copy the descriptors into the hardware */
988 saved_producer = producer;
989 hwdesc = &hw->cmd_desc_head[producer];
990 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
991 /* Take skb->data itself */
992 pbuf = &adapter->cmd_buf_arr[producer];
993 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
994 pbuf->mss = skb_shinfo(skb)->gso_size;
995 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
996 } else {
997 pbuf->mss = 0;
998 hwdesc->mss = 0;
999 }
1000 pbuf->total_length = skb->len;
1001 pbuf->skb = skb;
1002 pbuf->cmd = TX_ETHER_PKT;
1003 pbuf->frag_count = frag_count;
1004 pbuf->port = adapter->portnum;
1005 buffrag = &pbuf->frag_array[0];
1006 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
1007 PCI_DMA_TODEVICE);
1008 buffrag->length = first_seg_len;
1009 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
1010 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
1011 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
1012
1013 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
1014 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
1015 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1016 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1017
1018 for (i = 1, k = 1; i < frag_count; i++, k++) {
1019 struct skb_frag_struct *frag;
1020 int len, temp_len;
1021 unsigned long offset;
1022 dma_addr_t temp_dma;
1023
1024 /* move to next desc. if there is a need */
1025 if ((i & 0x3) == 0) {
1026 k = 0;
1027 producer = get_next_index(producer, num_txd);
1028 hwdesc = &hw->cmd_desc_head[producer];
1029 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1030 pbuf = &adapter->cmd_buf_arr[producer];
1031 pbuf->skb = NULL;
1032 }
1033 frag = &skb_shinfo(skb)->frags[i - 1];
1034 len = frag->size;
1035 offset = frag->page_offset;
1036
1037 temp_len = len;
1038 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
1039 len, PCI_DMA_TODEVICE);
1040
1041 buffrag++;
1042 buffrag->dma = temp_dma;
1043 buffrag->length = temp_len;
1044
1045 switch (k) {
1046 case 0:
1047 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1048 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1049 break;
1050 case 1:
1051 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1052 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1053 break;
1054 case 2:
1055 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1056 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1057 break;
1058 case 3:
1059 hwdesc->buffer4_length = cpu_to_le16(temp_len);
1060 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1061 break;
1062 }
1063 frag++;
1064 }
1065 producer = get_next_index(producer, num_txd);
1066
1067 /* might change opcode to TX_TCP_LSO */
1068 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1069
1070 /* For LSO, we need to copy the MAC/IP/TCP headers into
1071 * the descriptor ring
1072 */
1073 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1074 == TX_TCP_LSO) {
1075 int hdr_len, first_hdr_len, more_hdr;
1076 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1077 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1078 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1079 more_hdr = 1;
1080 } else {
1081 first_hdr_len = hdr_len;
1082 more_hdr = 0;
1083 }
1084 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1085 hwdesc = &hw->cmd_desc_head[producer];
1086 pbuf = &adapter->cmd_buf_arr[producer];
1087 pbuf->skb = NULL;
1088
1089 /* copy the first 64 bytes */
1090 memcpy(((void *)hwdesc) + 2,
1091 (void *)(skb->data), first_hdr_len);
1092 producer = get_next_index(producer, num_txd);
1093
1094 if (more_hdr) {
1095 hwdesc = &hw->cmd_desc_head[producer];
1096 pbuf = &adapter->cmd_buf_arr[producer];
1097 pbuf->skb = NULL;
1098 /* copy the next 64 bytes - should be enough except
1099 * for pathological case
1100 */
1101 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1102 hwdesc,
1103 (hdr_len -
1104 first_hdr_len));
1105 producer = get_next_index(producer, num_txd);
1106 }
1107 }
1108
1109 adapter->cmd_producer = producer;
1110 adapter->stats.txbytes += skb->len;
1111
1112 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
1113
1114 adapter->stats.xmitcalled++;
1115 netdev->trans_start = jiffies;
1116
1117 return NETDEV_TX_OK;
1118 }
1119
1120 static void netxen_watchdog(unsigned long v)
1121 {
1122 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1123
1124 SCHEDULE_WORK(&adapter->watchdog_task);
1125 }
1126
1127 static void netxen_tx_timeout(struct net_device *netdev)
1128 {
1129 struct netxen_adapter *adapter = (struct netxen_adapter *)
1130 netdev_priv(netdev);
1131 SCHEDULE_WORK(&adapter->tx_timeout_task);
1132 }
1133
1134 static void netxen_tx_timeout_task(struct work_struct *work)
1135 {
1136 struct netxen_adapter *adapter =
1137 container_of(work, struct netxen_adapter, tx_timeout_task);
1138
1139 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1140 netxen_nic_driver_name, adapter->netdev->name);
1141
1142 netxen_nic_disable_int(adapter);
1143 napi_disable(&adapter->napi);
1144
1145 adapter->netdev->trans_start = jiffies;
1146
1147 napi_enable(&adapter->napi);
1148 netxen_nic_enable_int(adapter);
1149 netif_wake_queue(adapter->netdev);
1150 }
1151
1152 static inline void
1153 netxen_handle_int(struct netxen_adapter *adapter)
1154 {
1155 netxen_nic_disable_int(adapter);
1156 napi_schedule(&adapter->napi);
1157 }
1158
1159 irqreturn_t netxen_intr(int irq, void *data)
1160 {
1161 struct netxen_adapter *adapter = data;
1162 u32 our_int = 0;
1163
1164 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1165 /* not our interrupt */
1166 if ((our_int & (0x80 << adapter->portnum)) == 0)
1167 return IRQ_NONE;
1168
1169 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1170 /* claim interrupt */
1171 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
1172 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1173 }
1174
1175 netxen_handle_int(adapter);
1176
1177 return IRQ_HANDLED;
1178 }
1179
1180 irqreturn_t netxen_msi_intr(int irq, void *data)
1181 {
1182 struct netxen_adapter *adapter = data;
1183
1184 netxen_handle_int(adapter);
1185 return IRQ_HANDLED;
1186 }
1187
1188 static int netxen_nic_poll(struct napi_struct *napi, int budget)
1189 {
1190 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
1191 int tx_complete;
1192 int ctx;
1193 int work_done;
1194
1195 tx_complete = netxen_process_cmd_ring(adapter);
1196
1197 work_done = 0;
1198 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1199 /*
1200 * Fairness issue. This will give undue weight to the
1201 * receive context 0.
1202 */
1203
1204 /*
1205 * To avoid starvation, we give each of our receivers,
1206 * a fraction of the quota. Sometimes, it might happen that we
1207 * have enough quota to process every packet, but since all the
1208 * packets are on one context, it gets only half of the quota,
1209 * and ends up not processing it.
1210 */
1211 work_done += netxen_process_rcv_ring(adapter, ctx,
1212 budget / MAX_RCV_CTX);
1213 }
1214
1215 if ((work_done < budget) && tx_complete) {
1216 netif_rx_complete(adapter->netdev, &adapter->napi);
1217 netxen_nic_enable_int(adapter);
1218 }
1219
1220 return work_done;
1221 }
1222
1223 #ifdef CONFIG_NET_POLL_CONTROLLER
1224 static void netxen_nic_poll_controller(struct net_device *netdev)
1225 {
1226 struct netxen_adapter *adapter = netdev_priv(netdev);
1227 disable_irq(adapter->irq);
1228 netxen_intr(adapter->irq, adapter);
1229 enable_irq(adapter->irq);
1230 }
1231 #endif
1232
1233 static struct pci_driver netxen_driver = {
1234 .name = netxen_nic_driver_name,
1235 .id_table = netxen_pci_tbl,
1236 .probe = netxen_nic_probe,
1237 .remove = __devexit_p(netxen_nic_remove)
1238 };
1239
1240 /* Driver Registration on NetXen card */
1241
1242 static int __init netxen_init_module(void)
1243 {
1244 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
1245 return -ENOMEM;
1246
1247 return pci_register_driver(&netxen_driver);
1248 }
1249
1250 module_init(netxen_init_module);
1251
1252 static void __exit netxen_exit_module(void)
1253 {
1254 /*
1255 * Wait for some time to allow the dma to drain, if any.
1256 */
1257 msleep(100);
1258 pci_unregister_driver(&netxen_driver);
1259 destroy_workqueue(netxen_workq);
1260 }
1261
1262 module_exit(netxen_exit_module);
Linux kernel - Deliverables
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