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netxen: fix portnum for hp mezz cards
[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 /*
90 * In netxen_nic_down(), we must wait for any pending callback requests into
91 * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
92 * reenabled right after it is deleted in netxen_nic_down().
93 * FLUSH_SCHEDULED_WORK() does this synchronization.
94 *
95 * Normally, schedule_work()/flush_scheduled_work() could have worked, but
96 * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
97 * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
98 * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
99 * linkwatch_event() to be executed which also attempts to acquire the rtnl
100 * lock thus causing a deadlock.
101 */
102
103 static struct workqueue_struct *netxen_workq;
104 #define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
105 #define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
106
107 static void netxen_watchdog(unsigned long);
108
109 static void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
110 uint32_t crb_producer)
111 {
112 switch (adapter->portnum) {
113 case 0:
114 writel(crb_producer, NETXEN_CRB_NORMALIZE
115 (adapter, CRB_CMD_PRODUCER_OFFSET));
116 return;
117 case 1:
118 writel(crb_producer, NETXEN_CRB_NORMALIZE
119 (adapter, CRB_CMD_PRODUCER_OFFSET_1));
120 return;
121 case 2:
122 writel(crb_producer, NETXEN_CRB_NORMALIZE
123 (adapter, CRB_CMD_PRODUCER_OFFSET_2));
124 return;
125 case 3:
126 writel(crb_producer, NETXEN_CRB_NORMALIZE
127 (adapter, CRB_CMD_PRODUCER_OFFSET_3));
128 return;
129 default:
130 printk(KERN_WARNING "We tried to update "
131 "CRB_CMD_PRODUCER_OFFSET for invalid "
132 "PCI function id %d\n",
133 adapter->portnum);
134 return;
135 }
136 }
137
138 static void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
139 u32 crb_consumer)
140 {
141 switch (adapter->portnum) {
142 case 0:
143 writel(crb_consumer, NETXEN_CRB_NORMALIZE
144 (adapter, CRB_CMD_CONSUMER_OFFSET));
145 return;
146 case 1:
147 writel(crb_consumer, NETXEN_CRB_NORMALIZE
148 (adapter, CRB_CMD_CONSUMER_OFFSET_1));
149 return;
150 case 2:
151 writel(crb_consumer, NETXEN_CRB_NORMALIZE
152 (adapter, CRB_CMD_CONSUMER_OFFSET_2));
153 return;
154 case 3:
155 writel(crb_consumer, NETXEN_CRB_NORMALIZE
156 (adapter, CRB_CMD_CONSUMER_OFFSET_3));
157 return;
158 default:
159 printk(KERN_WARNING "We tried to update "
160 "CRB_CMD_PRODUCER_OFFSET for invalid "
161 "PCI function id %d\n",
162 adapter->portnum);
163 return;
164 }
165 }
166
167 #define ADAPTER_LIST_SIZE 12
168
169 static uint32_t msi_tgt_status[4] = {
170 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
171 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3
172 };
173
174 static uint32_t sw_int_mask[4] = {
175 CRB_SW_INT_MASK_0, CRB_SW_INT_MASK_1,
176 CRB_SW_INT_MASK_2, CRB_SW_INT_MASK_3
177 };
178
179 static void netxen_nic_disable_int(struct netxen_adapter *adapter)
180 {
181 u32 mask = 0x7ff;
182 int retries = 32;
183 int port = adapter->portnum;
184 int pci_fn = adapter->ahw.pci_func;
185
186 if (adapter->msi_mode != MSI_MODE_MULTIFUNC)
187 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
188
189 if (adapter->intr_scheme != -1 &&
190 adapter->intr_scheme != INTR_SCHEME_PERPORT)
191 writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
192
193 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
194 do {
195 writel(0xffffffff,
196 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
197 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
198 if (!(mask & 0x80))
199 break;
200 udelay(10);
201 } while (--retries);
202
203 if (!retries) {
204 printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
205 netxen_nic_driver_name);
206 }
207 } else {
208 if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
209 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
210 msi_tgt_status[pci_fn]));
211 }
212 }
213 }
214
215 static void netxen_nic_enable_int(struct netxen_adapter *adapter)
216 {
217 u32 mask;
218 int port = adapter->portnum;
219
220 DPRINTK(1, INFO, "Entered ISR Enable \n");
221
222 if (adapter->intr_scheme != -1 &&
223 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
224 switch (adapter->ahw.board_type) {
225 case NETXEN_NIC_GBE:
226 mask = 0x77b;
227 break;
228 case NETXEN_NIC_XGBE:
229 mask = 0x77f;
230 break;
231 default:
232 mask = 0x7ff;
233 break;
234 }
235
236 writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
237 }
238
239 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
240
241 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
242 mask = 0xbff;
243 if (adapter->intr_scheme != -1 &&
244 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
245 writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
246 }
247 writel(mask,
248 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
249 }
250
251 DPRINTK(1, INFO, "Done with enable Int\n");
252 }
253
254 /*
255 * netxen_nic_probe()
256 *
257 * The Linux system will invoke this after identifying the vendor ID and
258 * device Id in the pci_tbl supported by this module.
259 *
260 * A quad port card has one operational PCI config space, (function 0),
261 * which is used to access all four ports.
262 *
263 * This routine will initialize the adapter, and setup the global parameters
264 * along with the port's specific structure.
265 */
266 static int __devinit
267 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
268 {
269 struct net_device *netdev = NULL;
270 struct netxen_adapter *adapter = NULL;
271 void __iomem *mem_ptr0 = NULL;
272 void __iomem *mem_ptr1 = NULL;
273 void __iomem *mem_ptr2 = NULL;
274 unsigned long first_page_group_end;
275 unsigned long first_page_group_start;
276
277
278 u8 __iomem *db_ptr = NULL;
279 unsigned long mem_base, mem_len, db_base, db_len;
280 int pci_using_dac, i = 0, err;
281 int ring;
282 struct netxen_recv_context *recv_ctx = NULL;
283 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
284 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
285 __le64 mac_addr[FLASH_NUM_PORTS + 1];
286 int valid_mac = 0;
287 u32 val;
288 int pci_func_id = PCI_FUNC(pdev->devfn);
289 DECLARE_MAC_BUF(mac);
290
291 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
292
293 if (pdev->class != 0x020000) {
294 printk(KERN_ERR"NetXen function %d, class %x will not "
295 "be enabled.\n",pci_func_id, pdev->class);
296 return -ENODEV;
297 }
298 if ((err = pci_enable_device(pdev)))
299 return err;
300 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
301 err = -ENODEV;
302 goto err_out_disable_pdev;
303 }
304
305 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
306 goto err_out_disable_pdev;
307
308 pci_set_master(pdev);
309 if (pdev->revision == NX_P2_C1 &&
310 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
311 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
312 pci_using_dac = 1;
313 } else {
314 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
315 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
316 goto err_out_free_res;
317
318 pci_using_dac = 0;
319 }
320
321
322 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
323 if(!netdev) {
324 printk(KERN_ERR"%s: Failed to allocate memory for the "
325 "device block.Check system memory resource"
326 " usage.\n", netxen_nic_driver_name);
327 goto err_out_free_res;
328 }
329
330 SET_NETDEV_DEV(netdev, &pdev->dev);
331
332 adapter = netdev->priv;
333
334 adapter->ahw.pdev = pdev;
335 adapter->ahw.pci_func = pci_func_id;
336
337 /* remap phys address */
338 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
339 mem_len = pci_resource_len(pdev, 0);
340
341 /* 128 Meg of memory */
342 if (mem_len == NETXEN_PCI_128MB_SIZE) {
343 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
344 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
345 SECOND_PAGE_GROUP_SIZE);
346 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
347 THIRD_PAGE_GROUP_SIZE);
348 first_page_group_start = FIRST_PAGE_GROUP_START;
349 first_page_group_end = FIRST_PAGE_GROUP_END;
350 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
351 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
352 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
353 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
354 first_page_group_start = 0;
355 first_page_group_end = 0;
356 } else {
357 err = -EIO;
358 goto err_out_free_netdev;
359 }
360
361 if ((!mem_ptr0 && mem_len == NETXEN_PCI_128MB_SIZE) ||
362 !mem_ptr1 || !mem_ptr2) {
363 DPRINTK(ERR,
364 "Cannot remap adapter memory aborting.:"
365 "0 -> %p, 1 -> %p, 2 -> %p\n",
366 mem_ptr0, mem_ptr1, mem_ptr2);
367
368 err = -EIO;
369 goto err_out_iounmap;
370 }
371 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
372 db_len = pci_resource_len(pdev, 4);
373
374 if (db_len == 0) {
375 printk(KERN_ERR "%s: doorbell is disabled\n",
376 netxen_nic_driver_name);
377 err = -EIO;
378 goto err_out_iounmap;
379 }
380 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
381 db_len);
382
383 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
384 if (!db_ptr) {
385 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
386 netxen_nic_driver_name);
387 err = -EIO;
388 goto err_out_iounmap;
389 }
390 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
391
392 adapter->ahw.pci_base0 = mem_ptr0;
393 adapter->ahw.first_page_group_start = first_page_group_start;
394 adapter->ahw.first_page_group_end = first_page_group_end;
395 adapter->ahw.pci_base1 = mem_ptr1;
396 adapter->ahw.pci_base2 = mem_ptr2;
397 adapter->ahw.db_base = db_ptr;
398 adapter->ahw.db_len = db_len;
399
400 adapter->netdev = netdev;
401 adapter->pdev = pdev;
402
403 netif_napi_add(netdev, &adapter->napi,
404 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
405
406 /* this will be read from FW later */
407 adapter->intr_scheme = -1;
408 adapter->msi_mode = -1;
409
410 /* This will be reset for mezz cards */
411 adapter->portnum = pci_func_id;
412 adapter->status &= ~NETXEN_NETDEV_STATUS;
413 adapter->rx_csum = 1;
414
415 netdev->open = netxen_nic_open;
416 netdev->stop = netxen_nic_close;
417 netdev->hard_start_xmit = netxen_nic_xmit_frame;
418 netdev->get_stats = netxen_nic_get_stats;
419 netdev->set_multicast_list = netxen_nic_set_multi;
420 netdev->set_mac_address = netxen_nic_set_mac;
421 netdev->change_mtu = netxen_nic_change_mtu;
422 netdev->tx_timeout = netxen_tx_timeout;
423 netdev->watchdog_timeo = 2*HZ;
424
425 netxen_nic_change_mtu(netdev, netdev->mtu);
426
427 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
428 #ifdef CONFIG_NET_POLL_CONTROLLER
429 netdev->poll_controller = netxen_nic_poll_controller;
430 #endif
431 /* ScatterGather support */
432 netdev->features = NETIF_F_SG;
433 netdev->features |= NETIF_F_IP_CSUM;
434 netdev->features |= NETIF_F_TSO;
435
436 if (pci_using_dac)
437 netdev->features |= NETIF_F_HIGHDMA;
438
439 if (pci_enable_msi(pdev))
440 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
441 else
442 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
443
444 netdev->irq = pdev->irq;
445 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
446
447 /*
448 * Set the CRB window to invalid. If any register in window 0 is
449 * accessed it should set the window to 0 and then reset it to 1.
450 */
451 adapter->curr_window = 255;
452
453 /* initialize the adapter */
454 netxen_initialize_adapter_hw(adapter);
455
456 /*
457 * Adapter in our case is quad port so initialize it before
458 * initializing the ports
459 */
460
461 netxen_initialize_adapter_ops(adapter);
462
463 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
464 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
465 (adapter->ahw.boardcfg.board_type ==
466 NETXEN_BRDTYPE_P2_SB31_2G))
467 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
468 else
469 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
470 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
471 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
472
473 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
474 if (cmd_buf_arr == NULL) {
475 printk(KERN_ERR
476 "%s: Could not allocate cmd_buf_arr memory:%d\n",
477 netxen_nic_driver_name, (int)TX_RINGSIZE);
478 err = -ENOMEM;
479 goto err_out_free_adapter;
480 }
481 memset(cmd_buf_arr, 0, TX_RINGSIZE);
482 adapter->cmd_buf_arr = cmd_buf_arr;
483
484 for (i = 0; i < MAX_RCV_CTX; ++i) {
485 recv_ctx = &adapter->recv_ctx[i];
486 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
487 rcv_desc = &recv_ctx->rcv_desc[ring];
488 switch (RCV_DESC_TYPE(ring)) {
489 case RCV_DESC_NORMAL:
490 rcv_desc->max_rx_desc_count =
491 adapter->max_rx_desc_count;
492 rcv_desc->flags = RCV_DESC_NORMAL;
493 rcv_desc->dma_size = RX_DMA_MAP_LEN;
494 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
495 break;
496
497 case RCV_DESC_JUMBO:
498 rcv_desc->max_rx_desc_count =
499 adapter->max_jumbo_rx_desc_count;
500 rcv_desc->flags = RCV_DESC_JUMBO;
501 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
502 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
503 break;
504
505 case RCV_RING_LRO:
506 rcv_desc->max_rx_desc_count =
507 adapter->max_lro_rx_desc_count;
508 rcv_desc->flags = RCV_DESC_LRO;
509 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
510 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
511 break;
512
513 }
514 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
515 vmalloc(RCV_BUFFSIZE);
516
517 if (rcv_desc->rx_buf_arr == NULL) {
518 printk(KERN_ERR "%s: Could not allocate "
519 "rcv_desc->rx_buf_arr memory:%d\n",
520 netxen_nic_driver_name,
521 (int)RCV_BUFFSIZE);
522 err = -ENOMEM;
523 goto err_out_free_rx_buffer;
524 }
525 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
526 }
527
528 }
529
530 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
531
532 /* Mezz cards have PCI function 0,2,3 enabled */
533 switch (adapter->ahw.boardcfg.board_type) {
534 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
535 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
536 if (pci_func_id >= 2)
537 adapter->portnum = pci_func_id - 2;
538 break;
539 default:
540 break;
541 }
542
543 #ifdef CONFIG_IA64
544 if(adapter->portnum == 0) {
545 netxen_pinit_from_rom(adapter, 0);
546 udelay(500);
547 netxen_load_firmware(adapter);
548 }
549 #endif
550
551 init_timer(&adapter->watchdog_timer);
552 adapter->ahw.xg_linkup = 0;
553 adapter->watchdog_timer.function = &netxen_watchdog;
554 adapter->watchdog_timer.data = (unsigned long)adapter;
555 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
556 adapter->ahw.pdev = pdev;
557 adapter->ahw.revision_id = pdev->revision;
558
559 /* make sure Window == 1 */
560 netxen_nic_pci_change_crbwindow(adapter, 1);
561
562 netxen_nic_update_cmd_producer(adapter, 0);
563 netxen_nic_update_cmd_consumer(adapter, 0);
564 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
565
566 if (netxen_is_flash_supported(adapter) == 0 &&
567 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
568 valid_mac = 1;
569 else
570 valid_mac = 0;
571
572 if (valid_mac) {
573 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
574 netdev->dev_addr[0] = *(p + 5);
575 netdev->dev_addr[1] = *(p + 4);
576 netdev->dev_addr[2] = *(p + 3);
577 netdev->dev_addr[3] = *(p + 2);
578 netdev->dev_addr[4] = *(p + 1);
579 netdev->dev_addr[5] = *(p + 0);
580
581 memcpy(netdev->perm_addr, netdev->dev_addr,
582 netdev->addr_len);
583 if (!is_valid_ether_addr(netdev->perm_addr)) {
584 printk(KERN_ERR "%s: Bad MAC address %s.\n",
585 netxen_nic_driver_name,
586 print_mac(mac, netdev->dev_addr));
587 } else {
588 if (adapter->macaddr_set)
589 adapter->macaddr_set(adapter,
590 netdev->dev_addr);
591 }
592 }
593
594 if (adapter->portnum == 0) {
595 err = netxen_initialize_adapter_offload(adapter);
596 if (err)
597 goto err_out_free_rx_buffer;
598 val = readl(NETXEN_CRB_NORMALIZE(adapter,
599 NETXEN_CAM_RAM(0x1fc)));
600 if (val == 0x55555555) {
601 /* This is the first boot after power up */
602 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
603 if (!(val & 0x4)) {
604 val |= 0x4;
605 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
606 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
607 if (!(val & 0x4))
608 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
609 netxen_nic_driver_name);
610 }
611 val = readl(NETXEN_CRB_NORMALIZE(adapter,
612 NETXEN_ROMUSB_GLB_SW_RESET));
613 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
614 if (val != 0x80000f) {
615 /* clear the register for future unloads/loads */
616 writel(0, NETXEN_CRB_NORMALIZE(adapter,
617 NETXEN_CAM_RAM(0x1fc)));
618 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
619 err = -ENODEV;
620 goto err_out_free_dev;
621 }
622 }
623
624 /* clear the register for future unloads/loads */
625 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
626 printk(KERN_INFO "State: 0x%0x\n",
627 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
628
629 /*
630 * Tell the hardware our version number.
631 */
632 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
633 | ((_NETXEN_NIC_LINUX_MINOR << 8))
634 | (_NETXEN_NIC_LINUX_SUBVERSION);
635 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
636
637 /* Unlock the HW, prompting the boot sequence */
638 writel(1,
639 NETXEN_CRB_NORMALIZE(adapter,
640 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
641 /* Handshake with the card before we register the devices. */
642 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
643 }
644
645 /*
646 * See if the firmware gave us a virtual-physical port mapping.
647 */
648 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
649 if (i != 0x55555555)
650 physical_port[adapter->portnum] = i;
651
652 netif_carrier_off(netdev);
653 netif_stop_queue(netdev);
654
655 if ((err = register_netdev(netdev))) {
656 printk(KERN_ERR "%s: register_netdev failed port #%d"
657 " aborting\n", netxen_nic_driver_name,
658 adapter->portnum);
659 err = -EIO;
660 goto err_out_free_dev;
661 }
662
663 pci_set_drvdata(pdev, adapter);
664
665 switch (adapter->ahw.board_type) {
666 case NETXEN_NIC_GBE:
667 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
668 netxen_nic_driver_name);
669 break;
670
671 case NETXEN_NIC_XGBE:
672 printk(KERN_INFO "%s: XGbE board initialized\n",
673 netxen_nic_driver_name);
674 break;
675 }
676
677 adapter->driver_mismatch = 0;
678
679 return 0;
680
681 err_out_free_dev:
682 if (adapter->portnum == 0)
683 netxen_free_adapter_offload(adapter);
684
685 err_out_free_rx_buffer:
686 for (i = 0; i < MAX_RCV_CTX; ++i) {
687 recv_ctx = &adapter->recv_ctx[i];
688 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
689 rcv_desc = &recv_ctx->rcv_desc[ring];
690 if (rcv_desc->rx_buf_arr != NULL) {
691 vfree(rcv_desc->rx_buf_arr);
692 rcv_desc->rx_buf_arr = NULL;
693 }
694 }
695 }
696 vfree(cmd_buf_arr);
697
698 err_out_free_adapter:
699 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
700 pci_disable_msi(pdev);
701
702 pci_set_drvdata(pdev, NULL);
703
704 if (db_ptr)
705 iounmap(db_ptr);
706
707 err_out_iounmap:
708 if (mem_ptr0)
709 iounmap(mem_ptr0);
710 if (mem_ptr1)
711 iounmap(mem_ptr1);
712 if (mem_ptr2)
713 iounmap(mem_ptr2);
714
715 err_out_free_netdev:
716 free_netdev(netdev);
717
718 err_out_free_res:
719 pci_release_regions(pdev);
720
721 err_out_disable_pdev:
722 pci_disable_device(pdev);
723 return err;
724 }
725
726 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
727 {
728 struct netxen_adapter *adapter;
729 struct net_device *netdev;
730 struct netxen_rx_buffer *buffer;
731 struct netxen_recv_context *recv_ctx;
732 struct netxen_rcv_desc_ctx *rcv_desc;
733 int i, ctxid, ring;
734 static int init_firmware_done = 0;
735
736 adapter = pci_get_drvdata(pdev);
737 if (adapter == NULL)
738 return;
739
740 netdev = adapter->netdev;
741
742 unregister_netdev(netdev);
743
744 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
745 init_firmware_done++;
746 netxen_free_hw_resources(adapter);
747 }
748
749 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
750 recv_ctx = &adapter->recv_ctx[ctxid];
751 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
752 rcv_desc = &recv_ctx->rcv_desc[ring];
753 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
754 buffer = &(rcv_desc->rx_buf_arr[i]);
755 if (buffer->state == NETXEN_BUFFER_FREE)
756 continue;
757 pci_unmap_single(pdev, buffer->dma,
758 rcv_desc->dma_size,
759 PCI_DMA_FROMDEVICE);
760 if (buffer->skb != NULL)
761 dev_kfree_skb_any(buffer->skb);
762 }
763 vfree(rcv_desc->rx_buf_arr);
764 }
765 }
766
767 vfree(adapter->cmd_buf_arr);
768
769 if (adapter->portnum == 0) {
770 if (init_firmware_done) {
771 i = 100;
772 do {
773 if (dma_watchdog_shutdown_request(adapter) == 1)
774 break;
775 msleep(100);
776 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
777 break;
778 } while (--i);
779
780 if (i == 0)
781 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
782 netdev->name);
783
784 /* clear the register for future unloads/loads */
785 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
786 printk(KERN_INFO "State: 0x%0x\n",
787 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
788
789 /* leave the hw in the same state as reboot */
790 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
791 netxen_pinit_from_rom(adapter, 0);
792 msleep(1);
793 netxen_load_firmware(adapter);
794 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
795 }
796
797 /* clear the register for future unloads/loads */
798 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
799 printk(KERN_INFO "State: 0x%0x\n",
800 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
801
802 i = 100;
803 do {
804 if (dma_watchdog_shutdown_request(adapter) == 1)
805 break;
806 msleep(100);
807 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
808 break;
809 } while (--i);
810
811 if (i) {
812 netxen_free_adapter_offload(adapter);
813 } else {
814 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
815 netdev->name);
816 }
817 }
818
819 if (adapter->irq)
820 free_irq(adapter->irq, adapter);
821
822 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
823 pci_disable_msi(pdev);
824
825 iounmap(adapter->ahw.db_base);
826 iounmap(adapter->ahw.pci_base0);
827 iounmap(adapter->ahw.pci_base1);
828 iounmap(adapter->ahw.pci_base2);
829
830 pci_release_regions(pdev);
831 pci_disable_device(pdev);
832 pci_set_drvdata(pdev, NULL);
833
834 free_netdev(netdev);
835 }
836
837 /*
838 * Called when a network interface is made active
839 * @returns 0 on success, negative value on failure
840 */
841 static int netxen_nic_open(struct net_device *netdev)
842 {
843 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
844 int err = 0;
845 int ctx, ring;
846 irq_handler_t handler;
847 unsigned long flags = IRQF_SAMPLE_RANDOM;
848
849 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
850 err = netxen_init_firmware(adapter);
851 if (err != 0) {
852 printk(KERN_ERR "Failed to init firmware\n");
853 return -EIO;
854 }
855 netxen_nic_flash_print(adapter);
856
857 /* setup all the resources for the Phantom... */
858 /* this include the descriptors for rcv, tx, and status */
859 netxen_nic_clear_stats(adapter);
860 err = netxen_nic_hw_resources(adapter);
861 if (err) {
862 printk(KERN_ERR "Error in setting hw resources:%d\n",
863 err);
864 return err;
865 }
866 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
867 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
868 netxen_post_rx_buffers(adapter, ctx, ring);
869 }
870 adapter->irq = adapter->ahw.pdev->irq;
871 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
872 handler = netxen_msi_intr;
873 else {
874 flags |= IRQF_SHARED;
875 handler = netxen_intr;
876 }
877 err = request_irq(adapter->irq, handler,
878 flags, netdev->name, adapter);
879 if (err) {
880 printk(KERN_ERR "request_irq failed with: %d\n", err);
881 netxen_free_hw_resources(adapter);
882 return err;
883 }
884
885 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
886 }
887 /* Done here again so that even if phantom sw overwrote it,
888 * we set it */
889 if (adapter->init_port
890 && adapter->init_port(adapter, adapter->portnum) != 0) {
891 printk(KERN_ERR "%s: Failed to initialize port %d\n",
892 netxen_nic_driver_name, adapter->portnum);
893 return -EIO;
894 }
895 if (adapter->macaddr_set)
896 adapter->macaddr_set(adapter, netdev->dev_addr);
897
898 netxen_nic_set_link_parameters(adapter);
899
900 netxen_nic_set_multi(netdev);
901 if (adapter->set_mtu)
902 adapter->set_mtu(adapter, netdev->mtu);
903
904 if (!adapter->driver_mismatch)
905 mod_timer(&adapter->watchdog_timer, jiffies);
906
907 napi_enable(&adapter->napi);
908 netxen_nic_enable_int(adapter);
909
910 if (!adapter->driver_mismatch)
911 netif_start_queue(netdev);
912
913 return 0;
914 }
915
916 /*
917 * netxen_nic_close - Disables a network interface entry point
918 */
919 static int netxen_nic_close(struct net_device *netdev)
920 {
921 struct netxen_adapter *adapter = netdev_priv(netdev);
922 int i, j;
923 struct netxen_cmd_buffer *cmd_buff;
924 struct netxen_skb_frag *buffrag;
925
926 netif_carrier_off(netdev);
927 netif_stop_queue(netdev);
928 napi_disable(&adapter->napi);
929
930 if (adapter->stop_port)
931 adapter->stop_port(adapter);
932
933 netxen_nic_disable_int(adapter);
934
935 cmd_buff = adapter->cmd_buf_arr;
936 for (i = 0; i < adapter->max_tx_desc_count; i++) {
937 buffrag = cmd_buff->frag_array;
938 if (buffrag->dma) {
939 pci_unmap_single(adapter->pdev, buffrag->dma,
940 buffrag->length, PCI_DMA_TODEVICE);
941 buffrag->dma = 0ULL;
942 }
943 for (j = 0; j < cmd_buff->frag_count; j++) {
944 buffrag++;
945 if (buffrag->dma) {
946 pci_unmap_page(adapter->pdev, buffrag->dma,
947 buffrag->length,
948 PCI_DMA_TODEVICE);
949 buffrag->dma = 0ULL;
950 }
951 }
952 /* Free the skb we received in netxen_nic_xmit_frame */
953 if (cmd_buff->skb) {
954 dev_kfree_skb_any(cmd_buff->skb);
955 cmd_buff->skb = NULL;
956 }
957 cmd_buff++;
958 }
959 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
960 FLUSH_SCHEDULED_WORK();
961 del_timer_sync(&adapter->watchdog_timer);
962 }
963
964 return 0;
965 }
966
967 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
968 {
969 struct netxen_adapter *adapter = netdev_priv(netdev);
970 struct netxen_hardware_context *hw = &adapter->ahw;
971 unsigned int first_seg_len = skb->len - skb->data_len;
972 struct netxen_skb_frag *buffrag;
973 unsigned int i;
974
975 u32 producer, consumer;
976 u32 saved_producer = 0;
977 struct cmd_desc_type0 *hwdesc;
978 int k;
979 struct netxen_cmd_buffer *pbuf = NULL;
980 int frag_count;
981 int no_of_desc;
982 u32 num_txd = adapter->max_tx_desc_count;
983
984 frag_count = skb_shinfo(skb)->nr_frags + 1;
985
986 /* There 4 fragments per descriptor */
987 no_of_desc = (frag_count + 3) >> 2;
988 if (netdev->features & NETIF_F_TSO) {
989 if (skb_shinfo(skb)->gso_size > 0) {
990
991 no_of_desc++;
992 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
993 sizeof(struct ethhdr)) >
994 (sizeof(struct cmd_desc_type0) - 2)) {
995 no_of_desc++;
996 }
997 }
998 }
999
1000 producer = adapter->cmd_producer;
1001 smp_mb();
1002 consumer = adapter->last_cmd_consumer;
1003 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
1004 netif_stop_queue(netdev);
1005 smp_mb();
1006 return NETDEV_TX_BUSY;
1007 }
1008
1009 /* Copy the descriptors into the hardware */
1010 saved_producer = producer;
1011 hwdesc = &hw->cmd_desc_head[producer];
1012 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1013 /* Take skb->data itself */
1014 pbuf = &adapter->cmd_buf_arr[producer];
1015 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
1016 pbuf->mss = skb_shinfo(skb)->gso_size;
1017 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
1018 } else {
1019 pbuf->mss = 0;
1020 hwdesc->mss = 0;
1021 }
1022 pbuf->total_length = skb->len;
1023 pbuf->skb = skb;
1024 pbuf->cmd = TX_ETHER_PKT;
1025 pbuf->frag_count = frag_count;
1026 pbuf->port = adapter->portnum;
1027 buffrag = &pbuf->frag_array[0];
1028 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
1029 PCI_DMA_TODEVICE);
1030 buffrag->length = first_seg_len;
1031 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
1032 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
1033 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
1034
1035 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
1036 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
1037 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1038 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1039
1040 for (i = 1, k = 1; i < frag_count; i++, k++) {
1041 struct skb_frag_struct *frag;
1042 int len, temp_len;
1043 unsigned long offset;
1044 dma_addr_t temp_dma;
1045
1046 /* move to next desc. if there is a need */
1047 if ((i & 0x3) == 0) {
1048 k = 0;
1049 producer = get_next_index(producer, num_txd);
1050 hwdesc = &hw->cmd_desc_head[producer];
1051 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1052 pbuf = &adapter->cmd_buf_arr[producer];
1053 pbuf->skb = NULL;
1054 }
1055 frag = &skb_shinfo(skb)->frags[i - 1];
1056 len = frag->size;
1057 offset = frag->page_offset;
1058
1059 temp_len = len;
1060 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
1061 len, PCI_DMA_TODEVICE);
1062
1063 buffrag++;
1064 buffrag->dma = temp_dma;
1065 buffrag->length = temp_len;
1066
1067 switch (k) {
1068 case 0:
1069 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1070 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1071 break;
1072 case 1:
1073 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1074 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1075 break;
1076 case 2:
1077 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1078 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1079 break;
1080 case 3:
1081 hwdesc->buffer4_length = cpu_to_le16(temp_len);
1082 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1083 break;
1084 }
1085 frag++;
1086 }
1087 producer = get_next_index(producer, num_txd);
1088
1089 /* might change opcode to TX_TCP_LSO */
1090 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1091
1092 /* For LSO, we need to copy the MAC/IP/TCP headers into
1093 * the descriptor ring
1094 */
1095 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1096 == TX_TCP_LSO) {
1097 int hdr_len, first_hdr_len, more_hdr;
1098 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1099 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1100 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1101 more_hdr = 1;
1102 } else {
1103 first_hdr_len = hdr_len;
1104 more_hdr = 0;
1105 }
1106 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1107 hwdesc = &hw->cmd_desc_head[producer];
1108 pbuf = &adapter->cmd_buf_arr[producer];
1109 pbuf->skb = NULL;
1110
1111 /* copy the first 64 bytes */
1112 memcpy(((void *)hwdesc) + 2,
1113 (void *)(skb->data), first_hdr_len);
1114 producer = get_next_index(producer, num_txd);
1115
1116 if (more_hdr) {
1117 hwdesc = &hw->cmd_desc_head[producer];
1118 pbuf = &adapter->cmd_buf_arr[producer];
1119 pbuf->skb = NULL;
1120 /* copy the next 64 bytes - should be enough except
1121 * for pathological case
1122 */
1123 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1124 hwdesc,
1125 (hdr_len -
1126 first_hdr_len));
1127 producer = get_next_index(producer, num_txd);
1128 }
1129 }
1130
1131 adapter->cmd_producer = producer;
1132 adapter->stats.txbytes += skb->len;
1133
1134 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
1135
1136 adapter->stats.xmitcalled++;
1137 netdev->trans_start = jiffies;
1138
1139 return NETDEV_TX_OK;
1140 }
1141
1142 static void netxen_watchdog(unsigned long v)
1143 {
1144 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1145
1146 SCHEDULE_WORK(&adapter->watchdog_task);
1147 }
1148
1149 static void netxen_tx_timeout(struct net_device *netdev)
1150 {
1151 struct netxen_adapter *adapter = (struct netxen_adapter *)
1152 netdev_priv(netdev);
1153 SCHEDULE_WORK(&adapter->tx_timeout_task);
1154 }
1155
1156 static void netxen_tx_timeout_task(struct work_struct *work)
1157 {
1158 struct netxen_adapter *adapter =
1159 container_of(work, struct netxen_adapter, tx_timeout_task);
1160
1161 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1162 netxen_nic_driver_name, adapter->netdev->name);
1163
1164 netxen_nic_disable_int(adapter);
1165 napi_disable(&adapter->napi);
1166
1167 adapter->netdev->trans_start = jiffies;
1168
1169 napi_enable(&adapter->napi);
1170 netxen_nic_enable_int(adapter);
1171 netif_wake_queue(adapter->netdev);
1172 }
1173
1174 static inline void
1175 netxen_handle_int(struct netxen_adapter *adapter)
1176 {
1177 netxen_nic_disable_int(adapter);
1178 napi_schedule(&adapter->napi);
1179 }
1180
1181 irqreturn_t netxen_intr(int irq, void *data)
1182 {
1183 struct netxen_adapter *adapter = data;
1184 u32 our_int = 0;
1185
1186 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1187 /* not our interrupt */
1188 if ((our_int & (0x80 << adapter->portnum)) == 0)
1189 return IRQ_NONE;
1190
1191 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1192 /* claim interrupt */
1193 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
1194 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1195 }
1196
1197 netxen_handle_int(adapter);
1198
1199 return IRQ_HANDLED;
1200 }
1201
1202 irqreturn_t netxen_msi_intr(int irq, void *data)
1203 {
1204 struct netxen_adapter *adapter = data;
1205
1206 netxen_handle_int(adapter);
1207 return IRQ_HANDLED;
1208 }
1209
1210 static int netxen_nic_poll(struct napi_struct *napi, int budget)
1211 {
1212 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
1213 int tx_complete;
1214 int ctx;
1215 int work_done;
1216
1217 tx_complete = netxen_process_cmd_ring(adapter);
1218
1219 work_done = 0;
1220 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1221 /*
1222 * Fairness issue. This will give undue weight to the
1223 * receive context 0.
1224 */
1225
1226 /*
1227 * To avoid starvation, we give each of our receivers,
1228 * a fraction of the quota. Sometimes, it might happen that we
1229 * have enough quota to process every packet, but since all the
1230 * packets are on one context, it gets only half of the quota,
1231 * and ends up not processing it.
1232 */
1233 work_done += netxen_process_rcv_ring(adapter, ctx,
1234 budget / MAX_RCV_CTX);
1235 }
1236
1237 if ((work_done < budget) && tx_complete) {
1238 netif_rx_complete(adapter->netdev, &adapter->napi);
1239 netxen_nic_enable_int(adapter);
1240 }
1241
1242 return work_done;
1243 }
1244
1245 #ifdef CONFIG_NET_POLL_CONTROLLER
1246 static void netxen_nic_poll_controller(struct net_device *netdev)
1247 {
1248 struct netxen_adapter *adapter = netdev_priv(netdev);
1249 disable_irq(adapter->irq);
1250 netxen_intr(adapter->irq, adapter);
1251 enable_irq(adapter->irq);
1252 }
1253 #endif
1254
1255 static struct pci_driver netxen_driver = {
1256 .name = netxen_nic_driver_name,
1257 .id_table = netxen_pci_tbl,
1258 .probe = netxen_nic_probe,
1259 .remove = __devexit_p(netxen_nic_remove)
1260 };
1261
1262 /* Driver Registration on NetXen card */
1263
1264 static int __init netxen_init_module(void)
1265 {
1266 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
1267 return -ENOMEM;
1268
1269 return pci_register_driver(&netxen_driver);
1270 }
1271
1272 module_init(netxen_init_module);
1273
1274 static void __exit netxen_exit_module(void)
1275 {
1276 /*
1277 * Wait for some time to allow the dma to drain, if any.
1278 */
1279 msleep(100);
1280 pci_unregister_driver(&netxen_driver);
1281 destroy_workqueue(netxen_workq);
1282 }
1283
1284 module_exit(netxen_exit_module);
Linux kernel - Deliverables
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