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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / net / netxen / netxen_nic_main.c
bloba8fb439a4d03395a024772bda25db0fa7deab718
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 if (adapter->intr_scheme != -1 &&
173 adapter->intr_scheme != INTR_SCHEME_PERPORT)
174 writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
175
176 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
177 do {
178 writel(0xffffffff,
179 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
180 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
181 if (!(mask & 0x80))
182 break;
183 udelay(10);
184 } while (--retries);
185
186 if (!retries) {
187 printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
188 netxen_nic_driver_name);
189 }
190 } else {
191 if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
192 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
193 msi_tgt_status[pci_fn]));
194 }
195 }
196 }
197
198 static void netxen_nic_enable_int(struct netxen_adapter *adapter)
199 {
200 u32 mask;
201 int port = adapter->portnum;
202
203 DPRINTK(1, INFO, "Entered ISR Enable \n");
204
205 if (adapter->intr_scheme != -1 &&
206 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
207 switch (adapter->ahw.board_type) {
208 case NETXEN_NIC_GBE:
209 mask = 0x77b;
210 break;
211 case NETXEN_NIC_XGBE:
212 mask = 0x77f;
213 break;
214 default:
215 mask = 0x7ff;
216 break;
217 }
218
219 writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
220 }
221
222 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
223
224 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
225 mask = 0xbff;
226 if (adapter->intr_scheme != -1 &&
227 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
228 writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
229 }
230 writel(mask,
231 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
232 }
233
234 DPRINTK(1, INFO, "Done with enable Int\n");
235 }
236
237 /*
238 * netxen_nic_probe()
239 *
240 * The Linux system will invoke this after identifying the vendor ID and
241 * device Id in the pci_tbl supported by this module.
242 *
243 * A quad port card has one operational PCI config space, (function 0),
244 * which is used to access all four ports.
245 *
246 * This routine will initialize the adapter, and setup the global parameters
247 * along with the port's specific structure.
248 */
249 static int __devinit
250 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
251 {
252 struct net_device *netdev = NULL;
253 struct netxen_adapter *adapter = NULL;
254 void __iomem *mem_ptr0 = NULL;
255 void __iomem *mem_ptr1 = NULL;
256 void __iomem *mem_ptr2 = NULL;
257 unsigned long first_page_group_end;
258 unsigned long first_page_group_start;
259
260
261 u8 __iomem *db_ptr = NULL;
262 unsigned long mem_base, mem_len, db_base, db_len;
263 int pci_using_dac, i = 0, err;
264 int ring;
265 struct netxen_recv_context *recv_ctx = NULL;
266 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
267 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
268 __le64 mac_addr[FLASH_NUM_PORTS + 1];
269 int valid_mac = 0;
270 u32 val;
271 int pci_func_id = PCI_FUNC(pdev->devfn);
272 DECLARE_MAC_BUF(mac);
273
274 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
275
276 if (pdev->class != 0x020000) {
277 printk(KERN_ERR"NetXen function %d, class %x will not "
278 "be enabled.\n",pci_func_id, pdev->class);
279 return -ENODEV;
280 }
281 if ((err = pci_enable_device(pdev)))
282 return err;
283 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
284 err = -ENODEV;
285 goto err_out_disable_pdev;
286 }
287
288 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
289 goto err_out_disable_pdev;
290
291 pci_set_master(pdev);
292 if (pdev->revision == NX_P2_C1 &&
293 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
294 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
295 pci_using_dac = 1;
296 } else {
297 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
298 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
299 goto err_out_free_res;
300
301 pci_using_dac = 0;
302 }
303
304
305 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
306 if(!netdev) {
307 printk(KERN_ERR"%s: Failed to allocate memory for the "
308 "device block.Check system memory resource"
309 " usage.\n", netxen_nic_driver_name);
310 goto err_out_free_res;
311 }
312
313 SET_NETDEV_DEV(netdev, &pdev->dev);
314
315 adapter = netdev->priv;
316
317 adapter->ahw.pdev = pdev;
318 adapter->ahw.pci_func = pci_func_id;
319
320 /* remap phys address */
321 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
322 mem_len = pci_resource_len(pdev, 0);
323
324 /* 128 Meg of memory */
325 if (mem_len == NETXEN_PCI_128MB_SIZE) {
326 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
327 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
328 SECOND_PAGE_GROUP_SIZE);
329 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
330 THIRD_PAGE_GROUP_SIZE);
331 first_page_group_start = FIRST_PAGE_GROUP_START;
332 first_page_group_end = FIRST_PAGE_GROUP_END;
333 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
334 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
335 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
336 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
337 first_page_group_start = 0;
338 first_page_group_end = 0;
339 } else {
340 err = -EIO;
341 goto err_out_free_netdev;
342 }
343
344 if ((!mem_ptr0 && mem_len == NETXEN_PCI_128MB_SIZE) ||
345 !mem_ptr1 || !mem_ptr2) {
346 DPRINTK(ERR,
347 "Cannot remap adapter memory aborting.:"
348 "0 -> %p, 1 -> %p, 2 -> %p\n",
349 mem_ptr0, mem_ptr1, mem_ptr2);
350
351 err = -EIO;
352 goto err_out_iounmap;
353 }
354 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
355 db_len = pci_resource_len(pdev, 4);
356
357 if (db_len == 0) {
358 printk(KERN_ERR "%s: doorbell is disabled\n",
359 netxen_nic_driver_name);
360 err = -EIO;
361 goto err_out_iounmap;
362 }
363 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
364 db_len);
365
366 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
367 if (!db_ptr) {
368 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
369 netxen_nic_driver_name);
370 err = -EIO;
371 goto err_out_iounmap;
372 }
373 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
374
375 adapter->ahw.pci_base0 = mem_ptr0;
376 adapter->ahw.first_page_group_start = first_page_group_start;
377 adapter->ahw.first_page_group_end = first_page_group_end;
378 adapter->ahw.pci_base1 = mem_ptr1;
379 adapter->ahw.pci_base2 = mem_ptr2;
380 adapter->ahw.db_base = db_ptr;
381 adapter->ahw.db_len = db_len;
382
383 adapter->netdev = netdev;
384 adapter->pdev = pdev;
385
386 netif_napi_add(netdev, &adapter->napi,
387 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
388
389 /* this will be read from FW later */
390 adapter->intr_scheme = -1;
391 adapter->msi_mode = -1;
392
393 /* This will be reset for mezz cards */
394 adapter->portnum = pci_func_id;
395 adapter->status &= ~NETXEN_NETDEV_STATUS;
396 adapter->rx_csum = 1;
397
398 netdev->open = netxen_nic_open;
399 netdev->stop = netxen_nic_close;
400 netdev->hard_start_xmit = netxen_nic_xmit_frame;
401 netdev->get_stats = netxen_nic_get_stats;
402 netdev->set_multicast_list = netxen_nic_set_multi;
403 netdev->set_mac_address = netxen_nic_set_mac;
404 netdev->change_mtu = netxen_nic_change_mtu;
405 netdev->tx_timeout = netxen_tx_timeout;
406 netdev->watchdog_timeo = 2*HZ;
407
408 netxen_nic_change_mtu(netdev, netdev->mtu);
409
410 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
411 #ifdef CONFIG_NET_POLL_CONTROLLER
412 netdev->poll_controller = netxen_nic_poll_controller;
413 #endif
414 /* ScatterGather support */
415 netdev->features = NETIF_F_SG;
416 netdev->features |= NETIF_F_IP_CSUM;
417 netdev->features |= NETIF_F_TSO;
418
419 if (pci_using_dac)
420 netdev->features |= NETIF_F_HIGHDMA;
421
422 if (pci_enable_msi(pdev))
423 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
424 else
425 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
426
427 netdev->irq = pdev->irq;
428 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
429
430 /*
431 * Set the CRB window to invalid. If any register in window 0 is
432 * accessed it should set the window to 0 and then reset it to 1.
433 */
434 adapter->curr_window = 255;
435
436 /* initialize the adapter */
437 netxen_initialize_adapter_hw(adapter);
438
439 /*
440 * Adapter in our case is quad port so initialize it before
441 * initializing the ports
442 */
443
444 netxen_initialize_adapter_ops(adapter);
445
446 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
447 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
448 (adapter->ahw.boardcfg.board_type ==
449 NETXEN_BRDTYPE_P2_SB31_2G))
450 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
451 else
452 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
453 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
454 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
455
456 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
457 if (cmd_buf_arr == NULL) {
458 printk(KERN_ERR
459 "%s: Could not allocate cmd_buf_arr memory:%d\n",
460 netxen_nic_driver_name, (int)TX_RINGSIZE);
461 err = -ENOMEM;
462 goto err_out_free_adapter;
463 }
464 memset(cmd_buf_arr, 0, TX_RINGSIZE);
465 adapter->cmd_buf_arr = cmd_buf_arr;
466
467 for (i = 0; i < MAX_RCV_CTX; ++i) {
468 recv_ctx = &adapter->recv_ctx[i];
469 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
470 rcv_desc = &recv_ctx->rcv_desc[ring];
471 switch (RCV_DESC_TYPE(ring)) {
472 case RCV_DESC_NORMAL:
473 rcv_desc->max_rx_desc_count =
474 adapter->max_rx_desc_count;
475 rcv_desc->flags = RCV_DESC_NORMAL;
476 rcv_desc->dma_size = RX_DMA_MAP_LEN;
477 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
478 break;
479
480 case RCV_DESC_JUMBO:
481 rcv_desc->max_rx_desc_count =
482 adapter->max_jumbo_rx_desc_count;
483 rcv_desc->flags = RCV_DESC_JUMBO;
484 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
485 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
486 break;
487
488 case RCV_RING_LRO:
489 rcv_desc->max_rx_desc_count =
490 adapter->max_lro_rx_desc_count;
491 rcv_desc->flags = RCV_DESC_LRO;
492 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
493 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
494 break;
495
496 }
497 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
498 vmalloc(RCV_BUFFSIZE);
499
500 if (rcv_desc->rx_buf_arr == NULL) {
501 printk(KERN_ERR "%s: Could not allocate "
502 "rcv_desc->rx_buf_arr memory:%d\n",
503 netxen_nic_driver_name,
504 (int)RCV_BUFFSIZE);
505 err = -ENOMEM;
506 goto err_out_free_rx_buffer;
507 }
508 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
509 }
510
511 }
512
513 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
514
515 /* Mezz cards have PCI function 0,2,3 enabled */
516 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
517 && (pci_func_id >= 2))
518 adapter->portnum = pci_func_id - 2;
519
520 #ifdef CONFIG_IA64
521 if(adapter->portnum == 0) {
522 netxen_pinit_from_rom(adapter, 0);
523 udelay(500);
524 netxen_load_firmware(adapter);
525 }
526 #endif
527
528 init_timer(&adapter->watchdog_timer);
529 adapter->ahw.xg_linkup = 0;
530 adapter->watchdog_timer.function = &netxen_watchdog;
531 adapter->watchdog_timer.data = (unsigned long)adapter;
532 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
533 adapter->ahw.pdev = pdev;
534 adapter->ahw.revision_id = pdev->revision;
535
536 /* make sure Window == 1 */
537 netxen_nic_pci_change_crbwindow(adapter, 1);
538
539 netxen_nic_update_cmd_producer(adapter, 0);
540 netxen_nic_update_cmd_consumer(adapter, 0);
541 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
542
543 if (netxen_is_flash_supported(adapter) == 0 &&
544 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
545 valid_mac = 1;
546 else
547 valid_mac = 0;
548
549 if (valid_mac) {
550 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
551 netdev->dev_addr[0] = *(p + 5);
552 netdev->dev_addr[1] = *(p + 4);
553 netdev->dev_addr[2] = *(p + 3);
554 netdev->dev_addr[3] = *(p + 2);
555 netdev->dev_addr[4] = *(p + 1);
556 netdev->dev_addr[5] = *(p + 0);
557
558 memcpy(netdev->perm_addr, netdev->dev_addr,
559 netdev->addr_len);
560 if (!is_valid_ether_addr(netdev->perm_addr)) {
561 printk(KERN_ERR "%s: Bad MAC address %s.\n",
562 netxen_nic_driver_name,
563 print_mac(mac, netdev->dev_addr));
564 } else {
565 if (adapter->macaddr_set)
566 adapter->macaddr_set(adapter,
567 netdev->dev_addr);
568 }
569 }
570
571 if (adapter->portnum == 0) {
572 err = netxen_initialize_adapter_offload(adapter);
573 if (err)
574 goto err_out_free_rx_buffer;
575 val = readl(NETXEN_CRB_NORMALIZE(adapter,
576 NETXEN_CAM_RAM(0x1fc)));
577 if (val == 0x55555555) {
578 /* This is the first boot after power up */
579 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
580 if (!(val & 0x4)) {
581 val |= 0x4;
582 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
583 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
584 if (!(val & 0x4))
585 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
586 netxen_nic_driver_name);
587 }
588 val = readl(NETXEN_CRB_NORMALIZE(adapter,
589 NETXEN_ROMUSB_GLB_SW_RESET));
590 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
591 if (val != 0x80000f) {
592 /* clear the register for future unloads/loads */
593 writel(0, NETXEN_CRB_NORMALIZE(adapter,
594 NETXEN_CAM_RAM(0x1fc)));
595 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
596 err = -ENODEV;
597 goto err_out_free_dev;
598 }
599 }
600
601 /* clear the register for future unloads/loads */
602 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
603 printk(KERN_INFO "State: 0x%0x\n",
604 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
605
606 /*
607 * Tell the hardware our version number.
608 */
609 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
610 | ((_NETXEN_NIC_LINUX_MINOR << 8))
611 | (_NETXEN_NIC_LINUX_SUBVERSION);
612 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
613
614 /* Unlock the HW, prompting the boot sequence */
615 writel(1,
616 NETXEN_CRB_NORMALIZE(adapter,
617 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
618 /* Handshake with the card before we register the devices. */
619 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
620 }
621
622 /*
623 * See if the firmware gave us a virtual-physical port mapping.
624 */
625 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
626 if (i != 0x55555555)
627 physical_port[adapter->portnum] = i;
628
629 netif_carrier_off(netdev);
630 netif_stop_queue(netdev);
631
632 if ((err = register_netdev(netdev))) {
633 printk(KERN_ERR "%s: register_netdev failed port #%d"
634 " aborting\n", netxen_nic_driver_name,
635 adapter->portnum);
636 err = -EIO;
637 goto err_out_free_dev;
638 }
639
640 pci_set_drvdata(pdev, adapter);
641
642 switch (adapter->ahw.board_type) {
643 case NETXEN_NIC_GBE:
644 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
645 netxen_nic_driver_name);
646 break;
647
648 case NETXEN_NIC_XGBE:
649 printk(KERN_INFO "%s: XGbE board initialized\n",
650 netxen_nic_driver_name);
651 break;
652 }
653
654 adapter->driver_mismatch = 0;
655
656 return 0;
657
658 err_out_free_dev:
659 if (adapter->portnum == 0)
660 netxen_free_adapter_offload(adapter);
661
662 err_out_free_rx_buffer:
663 for (i = 0; i < MAX_RCV_CTX; ++i) {
664 recv_ctx = &adapter->recv_ctx[i];
665 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
666 rcv_desc = &recv_ctx->rcv_desc[ring];
667 if (rcv_desc->rx_buf_arr != NULL) {
668 vfree(rcv_desc->rx_buf_arr);
669 rcv_desc->rx_buf_arr = NULL;
670 }
671 }
672 }
673 vfree(cmd_buf_arr);
674
675 err_out_free_adapter:
676 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
677 pci_disable_msi(pdev);
678
679 pci_set_drvdata(pdev, NULL);
680
681 if (db_ptr)
682 iounmap(db_ptr);
683
684 err_out_iounmap:
685 if (mem_ptr0)
686 iounmap(mem_ptr0);
687 if (mem_ptr1)
688 iounmap(mem_ptr1);
689 if (mem_ptr2)
690 iounmap(mem_ptr2);
691
692 err_out_free_netdev:
693 free_netdev(netdev);
694
695 err_out_free_res:
696 pci_release_regions(pdev);
697
698 err_out_disable_pdev:
699 pci_disable_device(pdev);
700 return err;
701 }
702
703 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
704 {
705 struct netxen_adapter *adapter;
706 struct net_device *netdev;
707 struct netxen_rx_buffer *buffer;
708 struct netxen_recv_context *recv_ctx;
709 struct netxen_rcv_desc_ctx *rcv_desc;
710 int i, ctxid, ring;
711 static int init_firmware_done = 0;
712
713 adapter = pci_get_drvdata(pdev);
714 if (adapter == NULL)
715 return;
716
717 netdev = adapter->netdev;
718
719 unregister_netdev(netdev);
720
721 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
722 init_firmware_done++;
723 netxen_free_hw_resources(adapter);
724 }
725
726 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
727 recv_ctx = &adapter->recv_ctx[ctxid];
728 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
729 rcv_desc = &recv_ctx->rcv_desc[ring];
730 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
731 buffer = &(rcv_desc->rx_buf_arr[i]);
732 if (buffer->state == NETXEN_BUFFER_FREE)
733 continue;
734 pci_unmap_single(pdev, buffer->dma,
735 rcv_desc->dma_size,
736 PCI_DMA_FROMDEVICE);
737 if (buffer->skb != NULL)
738 dev_kfree_skb_any(buffer->skb);
739 }
740 vfree(rcv_desc->rx_buf_arr);
741 }
742 }
743
744 vfree(adapter->cmd_buf_arr);
745
746 if (adapter->portnum == 0) {
747 if (init_firmware_done) {
748 i = 100;
749 do {
750 if (dma_watchdog_shutdown_request(adapter) == 1)
751 break;
752 msleep(100);
753 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
754 break;
755 } while (--i);
756
757 if (i == 0)
758 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
759 netdev->name);
760
761 /* clear the register for future unloads/loads */
762 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
763 printk(KERN_INFO "State: 0x%0x\n",
764 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
765
766 /* leave the hw in the same state as reboot */
767 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
768 netxen_pinit_from_rom(adapter, 0);
769 msleep(1);
770 netxen_load_firmware(adapter);
771 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
772 }
773
774 /* clear the register for future unloads/loads */
775 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
776 printk(KERN_INFO "State: 0x%0x\n",
777 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
778
779 i = 100;
780 do {
781 if (dma_watchdog_shutdown_request(adapter) == 1)
782 break;
783 msleep(100);
784 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
785 break;
786 } while (--i);
787
788 if (i) {
789 netxen_free_adapter_offload(adapter);
790 } else {
791 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
792 netdev->name);
793 }
794 }
795
796 if (adapter->irq)
797 free_irq(adapter->irq, adapter);
798
799 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
800 pci_disable_msi(pdev);
801
802 iounmap(adapter->ahw.db_base);
803 iounmap(adapter->ahw.pci_base0);
804 iounmap(adapter->ahw.pci_base1);
805 iounmap(adapter->ahw.pci_base2);
806
807 pci_release_regions(pdev);
808 pci_disable_device(pdev);
809 pci_set_drvdata(pdev, NULL);
810
811 free_netdev(netdev);
812 }
813
814 /*
815 * Called when a network interface is made active
816 * @returns 0 on success, negative value on failure
817 */
818 static int netxen_nic_open(struct net_device *netdev)
819 {
820 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
821 int err = 0;
822 int ctx, ring;
823 irq_handler_t handler;
824 unsigned long flags = IRQF_SAMPLE_RANDOM;
825
826 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
827 err = netxen_init_firmware(adapter);
828 if (err != 0) {
829 printk(KERN_ERR "Failed to init firmware\n");
830 return -EIO;
831 }
832 netxen_nic_flash_print(adapter);
833
834 /* setup all the resources for the Phantom... */
835 /* this include the descriptors for rcv, tx, and status */
836 netxen_nic_clear_stats(adapter);
837 err = netxen_nic_hw_resources(adapter);
838 if (err) {
839 printk(KERN_ERR "Error in setting hw resources:%d\n",
840 err);
841 return err;
842 }
843 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
844 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
845 netxen_post_rx_buffers(adapter, ctx, ring);
846 }
847 adapter->irq = adapter->ahw.pdev->irq;
848 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
849 handler = netxen_msi_intr;
850 else {
851 flags |= IRQF_SHARED;
852 handler = netxen_intr;
853 }
854 err = request_irq(adapter->irq, handler,
855 flags, netdev->name, adapter);
856 if (err) {
857 printk(KERN_ERR "request_irq failed with: %d\n", err);
858 netxen_free_hw_resources(adapter);
859 return err;
860 }
861
862 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
863 }
864 /* Done here again so that even if phantom sw overwrote it,
865 * we set it */
866 if (adapter->init_port
867 && adapter->init_port(adapter, adapter->portnum) != 0) {
868 printk(KERN_ERR "%s: Failed to initialize port %d\n",
869 netxen_nic_driver_name, adapter->portnum);
870 return -EIO;
871 }
872 if (adapter->macaddr_set)
873 adapter->macaddr_set(adapter, netdev->dev_addr);
874
875 netxen_nic_set_link_parameters(adapter);
876
877 netxen_nic_set_multi(netdev);
878 if (adapter->set_mtu)
879 adapter->set_mtu(adapter, netdev->mtu);
880
881 if (!adapter->driver_mismatch)
882 mod_timer(&adapter->watchdog_timer, jiffies);
883
884 napi_enable(&adapter->napi);
885 netxen_nic_enable_int(adapter);
886
887 if (!adapter->driver_mismatch)
888 netif_start_queue(netdev);
889
890 return 0;
891 }
892
893 /*
894 * netxen_nic_close - Disables a network interface entry point
895 */
896 static int netxen_nic_close(struct net_device *netdev)
897 {
898 struct netxen_adapter *adapter = netdev_priv(netdev);
899 int i, j;
900 struct netxen_cmd_buffer *cmd_buff;
901 struct netxen_skb_frag *buffrag;
902
903 netif_carrier_off(netdev);
904 netif_stop_queue(netdev);
905 napi_disable(&adapter->napi);
906
907 if (adapter->stop_port)
908 adapter->stop_port(adapter);
909
910 netxen_nic_disable_int(adapter);
911
912 cmd_buff = adapter->cmd_buf_arr;
913 for (i = 0; i < adapter->max_tx_desc_count; i++) {
914 buffrag = cmd_buff->frag_array;
915 if (buffrag->dma) {
916 pci_unmap_single(adapter->pdev, buffrag->dma,
917 buffrag->length, PCI_DMA_TODEVICE);
918 buffrag->dma = 0ULL;
919 }
920 for (j = 0; j < cmd_buff->frag_count; j++) {
921 buffrag++;
922 if (buffrag->dma) {
923 pci_unmap_page(adapter->pdev, buffrag->dma,
924 buffrag->length,
925 PCI_DMA_TODEVICE);
926 buffrag->dma = 0ULL;
927 }
928 }
929 /* Free the skb we received in netxen_nic_xmit_frame */
930 if (cmd_buff->skb) {
931 dev_kfree_skb_any(cmd_buff->skb);
932 cmd_buff->skb = NULL;
933 }
934 cmd_buff++;
935 }
936 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
937 FLUSH_SCHEDULED_WORK();
938 del_timer_sync(&adapter->watchdog_timer);
939 }
940
941 return 0;
942 }
943
944 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
945 {
946 struct netxen_adapter *adapter = netdev_priv(netdev);
947 struct netxen_hardware_context *hw = &adapter->ahw;
948 unsigned int first_seg_len = skb->len - skb->data_len;
949 struct netxen_skb_frag *buffrag;
950 unsigned int i;
951
952 u32 producer, consumer;
953 u32 saved_producer = 0;
954 struct cmd_desc_type0 *hwdesc;
955 int k;
956 struct netxen_cmd_buffer *pbuf = NULL;
957 int frag_count;
958 int no_of_desc;
959 u32 num_txd = adapter->max_tx_desc_count;
960
961 frag_count = skb_shinfo(skb)->nr_frags + 1;
962
963 /* There 4 fragments per descriptor */
964 no_of_desc = (frag_count + 3) >> 2;
965 if (netdev->features & NETIF_F_TSO) {
966 if (skb_shinfo(skb)->gso_size > 0) {
967
968 no_of_desc++;
969 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
970 sizeof(struct ethhdr)) >
971 (sizeof(struct cmd_desc_type0) - 2)) {
972 no_of_desc++;
973 }
974 }
975 }
976
977 producer = adapter->cmd_producer;
978 smp_mb();
979 consumer = adapter->last_cmd_consumer;
980 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
981 netif_stop_queue(netdev);
982 smp_mb();
983 return NETDEV_TX_BUSY;
984 }
985
986 /* Copy the descriptors into the hardware */
987 saved_producer = producer;
988 hwdesc = &hw->cmd_desc_head[producer];
989 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
990 /* Take skb->data itself */
991 pbuf = &adapter->cmd_buf_arr[producer];
992 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
993 pbuf->mss = skb_shinfo(skb)->gso_size;
994 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
995 } else {
996 pbuf->mss = 0;
997 hwdesc->mss = 0;
998 }
999 pbuf->total_length = skb->len;
1000 pbuf->skb = skb;
1001 pbuf->cmd = TX_ETHER_PKT;
1002 pbuf->frag_count = frag_count;
1003 pbuf->port = adapter->portnum;
1004 buffrag = &pbuf->frag_array[0];
1005 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
1006 PCI_DMA_TODEVICE);
1007 buffrag->length = first_seg_len;
1008 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
1009 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
1010 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
1011
1012 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
1013 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
1014 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1015 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1016
1017 for (i = 1, k = 1; i < frag_count; i++, k++) {
1018 struct skb_frag_struct *frag;
1019 int len, temp_len;
1020 unsigned long offset;
1021 dma_addr_t temp_dma;
1022
1023 /* move to next desc. if there is a need */
1024 if ((i & 0x3) == 0) {
1025 k = 0;
1026 producer = get_next_index(producer, num_txd);
1027 hwdesc = &hw->cmd_desc_head[producer];
1028 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1029 pbuf = &adapter->cmd_buf_arr[producer];
1030 pbuf->skb = NULL;
1031 }
1032 frag = &skb_shinfo(skb)->frags[i - 1];
1033 len = frag->size;
1034 offset = frag->page_offset;
1035
1036 temp_len = len;
1037 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
1038 len, PCI_DMA_TODEVICE);
1039
1040 buffrag++;
1041 buffrag->dma = temp_dma;
1042 buffrag->length = temp_len;
1043
1044 switch (k) {
1045 case 0:
1046 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1047 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1048 break;
1049 case 1:
1050 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1051 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1052 break;
1053 case 2:
1054 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1055 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1056 break;
1057 case 3:
1058 hwdesc->buffer4_length = cpu_to_le16(temp_len);
1059 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1060 break;
1061 }
1062 frag++;
1063 }
1064 producer = get_next_index(producer, num_txd);
1065
1066 /* might change opcode to TX_TCP_LSO */
1067 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1068
1069 /* For LSO, we need to copy the MAC/IP/TCP headers into
1070 * the descriptor ring
1071 */
1072 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1073 == TX_TCP_LSO) {
1074 int hdr_len, first_hdr_len, more_hdr;
1075 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1076 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1077 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1078 more_hdr = 1;
1079 } else {
1080 first_hdr_len = hdr_len;
1081 more_hdr = 0;
1082 }
1083 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1084 hwdesc = &hw->cmd_desc_head[producer];
1085 pbuf = &adapter->cmd_buf_arr[producer];
1086 pbuf->skb = NULL;
1087
1088 /* copy the first 64 bytes */
1089 memcpy(((void *)hwdesc) + 2,
1090 (void *)(skb->data), first_hdr_len);
1091 producer = get_next_index(producer, num_txd);
1092
1093 if (more_hdr) {
1094 hwdesc = &hw->cmd_desc_head[producer];
1095 pbuf = &adapter->cmd_buf_arr[producer];
1096 pbuf->skb = NULL;
1097 /* copy the next 64 bytes - should be enough except
1098 * for pathological case
1099 */
1100 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1101 hwdesc,
1102 (hdr_len -
1103 first_hdr_len));
1104 producer = get_next_index(producer, num_txd);
1105 }
1106 }
1107
1108 adapter->cmd_producer = producer;
1109 adapter->stats.txbytes += skb->len;
1110
1111 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
1112
1113 adapter->stats.xmitcalled++;
1114 netdev->trans_start = jiffies;
1115
1116 return NETDEV_TX_OK;
1117 }
1118
1119 static void netxen_watchdog(unsigned long v)
1120 {
1121 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1122
1123 SCHEDULE_WORK(&adapter->watchdog_task);
1124 }
1125
1126 static void netxen_tx_timeout(struct net_device *netdev)
1127 {
1128 struct netxen_adapter *adapter = (struct netxen_adapter *)
1129 netdev_priv(netdev);
1130 SCHEDULE_WORK(&adapter->tx_timeout_task);
1131 }
1132
1133 static void netxen_tx_timeout_task(struct work_struct *work)
1134 {
1135 struct netxen_adapter *adapter =
1136 container_of(work, struct netxen_adapter, tx_timeout_task);
1137
1138 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1139 netxen_nic_driver_name, adapter->netdev->name);
1140
1141 netxen_nic_disable_int(adapter);
1142 napi_disable(&adapter->napi);
1143
1144 adapter->netdev->trans_start = jiffies;
1145
1146 napi_enable(&adapter->napi);
1147 netxen_nic_enable_int(adapter);
1148 netif_wake_queue(adapter->netdev);
1149 }
1150
1151 static inline void
1152 netxen_handle_int(struct netxen_adapter *adapter)
1153 {
1154 netxen_nic_disable_int(adapter);
1155 napi_schedule(&adapter->napi);
1156 }
1157
1158 irqreturn_t netxen_intr(int irq, void *data)
1159 {
1160 struct netxen_adapter *adapter = data;
1161 u32 our_int = 0;
1162
1163 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1164 /* not our interrupt */
1165 if ((our_int & (0x80 << adapter->portnum)) == 0)
1166 return IRQ_NONE;
1167
1168 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1169 /* claim interrupt */
1170 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
1171 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1172 }
1173
1174 netxen_handle_int(adapter);
1175
1176 return IRQ_HANDLED;
1177 }
1178
1179 irqreturn_t netxen_msi_intr(int irq, void *data)
1180 {
1181 struct netxen_adapter *adapter = data;
1182
1183 netxen_handle_int(adapter);
1184 return IRQ_HANDLED;
1185 }
1186
1187 static int netxen_nic_poll(struct napi_struct *napi, int budget)
1188 {
1189 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
1190 int tx_complete;
1191 int ctx;
1192 int work_done;
1193
1194 tx_complete = netxen_process_cmd_ring(adapter);
1195
1196 work_done = 0;
1197 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1198 /*
1199 * Fairness issue. This will give undue weight to the
1200 * receive context 0.
1201 */
1202
1203 /*
1204 * To avoid starvation, we give each of our receivers,
1205 * a fraction of the quota. Sometimes, it might happen that we
1206 * have enough quota to process every packet, but since all the
1207 * packets are on one context, it gets only half of the quota,
1208 * and ends up not processing it.
1209 */
1210 work_done += netxen_process_rcv_ring(adapter, ctx,
1211 budget / MAX_RCV_CTX);
1212 }
1213
1214 if ((work_done < budget) && tx_complete) {
1215 netif_rx_complete(adapter->netdev, &adapter->napi);
1216 netxen_nic_enable_int(adapter);
1217 }
1218
1219 return work_done;
1220 }
1221
1222 #ifdef CONFIG_NET_POLL_CONTROLLER
1223 static void netxen_nic_poll_controller(struct net_device *netdev)
1224 {
1225 struct netxen_adapter *adapter = netdev_priv(netdev);
1226 disable_irq(adapter->irq);
1227 netxen_intr(adapter->irq, adapter);
1228 enable_irq(adapter->irq);
1229 }
1230 #endif
1231
1232 static struct pci_driver netxen_driver = {
1233 .name = netxen_nic_driver_name,
1234 .id_table = netxen_pci_tbl,
1235 .probe = netxen_nic_probe,
1236 .remove = __devexit_p(netxen_nic_remove)
1237 };
1238
1239 /* Driver Registration on NetXen card */
1240
1241 static int __init netxen_init_module(void)
1242 {
1243 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
1244 return -ENOMEM;
1245
1246 return pci_register_driver(&netxen_driver);
1247 }
1248
1249 module_init(netxen_init_module);
1250
1251 static void __exit netxen_exit_module(void)
1252 {
1253 /*
1254 * Wait for some time to allow the dma to drain, if any.
1255 */
1256 msleep(100);
1257 pci_unregister_driver(&netxen_driver);
1258 destroy_workqueue(netxen_workq);
1259 }
1260
1261 module_exit(netxen_exit_module);
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