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[PATCH] drivers/net: remove superfluous memset
[linux-2.6/linux-loongson.git] / drivers / net / netxen / netxen_nic_main.c
blobdcd66a6b49040ad645374b7ec810699e0eba149a
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 #define DMA_32BIT_MASK 0x00000000ffffffffULL
57 #define DMA_35BIT_MASK 0x00000007ffffffffULL
58
59 /* Local functions to NetXen NIC driver */
60 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
61 const struct pci_device_id *ent);
62 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
63 static int netxen_nic_open(struct net_device *netdev);
64 static int netxen_nic_close(struct net_device *netdev);
65 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
66 static void netxen_tx_timeout(struct net_device *netdev);
67 static void netxen_tx_timeout_task(struct work_struct *work);
68 static void netxen_watchdog(unsigned long);
69 static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
70 static int netxen_nic_poll(struct napi_struct *napi, int budget);
71 #ifdef CONFIG_NET_POLL_CONTROLLER
72 static void netxen_nic_poll_controller(struct net_device *netdev);
73 #endif
74 static irqreturn_t netxen_intr(int irq, void *data);
75
76 int physical_port[] = {0, 1, 2, 3};
77
78 /* PCI Device ID Table */
79 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
80 {PCI_DEVICE(0x4040, 0x0001)},
81 {PCI_DEVICE(0x4040, 0x0002)},
82 {PCI_DEVICE(0x4040, 0x0003)},
83 {PCI_DEVICE(0x4040, 0x0004)},
84 {PCI_DEVICE(0x4040, 0x0005)},
85 {PCI_DEVICE(0x4040, 0x0024)},
86 {PCI_DEVICE(0x4040, 0x0025)},
87 {0,}
88 };
89
90 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
91
92 struct workqueue_struct *netxen_workq;
93 static void netxen_watchdog(unsigned long);
94
95 static inline void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
96 uint32_t crb_producer)
97 {
98 switch (adapter->portnum) {
99 case 0:
100 writel(crb_producer, NETXEN_CRB_NORMALIZE
101 (adapter, CRB_CMD_PRODUCER_OFFSET));
102 return;
103 case 1:
104 writel(crb_producer, NETXEN_CRB_NORMALIZE
105 (adapter, CRB_CMD_PRODUCER_OFFSET_1));
106 return;
107 case 2:
108 writel(crb_producer, NETXEN_CRB_NORMALIZE
109 (adapter, CRB_CMD_PRODUCER_OFFSET_2));
110 return;
111 case 3:
112 writel(crb_producer, NETXEN_CRB_NORMALIZE
113 (adapter, CRB_CMD_PRODUCER_OFFSET_3));
114 return;
115 default:
116 printk(KERN_WARNING "We tried to update "
117 "CRB_CMD_PRODUCER_OFFSET for invalid "
118 "PCI function id %d\n",
119 adapter->portnum);
120 return;
121 }
122 }
123
124 static inline void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
125 u32 crb_consumer)
126 {
127 switch (adapter->portnum) {
128 case 0:
129 writel(crb_consumer, NETXEN_CRB_NORMALIZE
130 (adapter, CRB_CMD_CONSUMER_OFFSET));
131 return;
132 case 1:
133 writel(crb_consumer, NETXEN_CRB_NORMALIZE
134 (adapter, CRB_CMD_CONSUMER_OFFSET_1));
135 return;
136 case 2:
137 writel(crb_consumer, NETXEN_CRB_NORMALIZE
138 (adapter, CRB_CMD_CONSUMER_OFFSET_2));
139 return;
140 case 3:
141 writel(crb_consumer, NETXEN_CRB_NORMALIZE
142 (adapter, CRB_CMD_CONSUMER_OFFSET_3));
143 return;
144 default:
145 printk(KERN_WARNING "We tried to update "
146 "CRB_CMD_PRODUCER_OFFSET for invalid "
147 "PCI function id %d\n",
148 adapter->portnum);
149 return;
150 }
151 }
152
153 #define ADAPTER_LIST_SIZE 12
154 int netxen_cards_found;
155
156 static void netxen_nic_disable_int(struct netxen_adapter *adapter)
157 {
158 uint32_t mask = 0x7ff;
159 int retries = 32;
160
161 DPRINTK(1, INFO, "Entered ISR Disable \n");
162
163 switch (adapter->portnum) {
164 case 0:
165 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_0));
166 break;
167 case 1:
168 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_1));
169 break;
170 case 2:
171 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_2));
172 break;
173 case 3:
174 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_3));
175 break;
176 }
177
178 if (adapter->intr_scheme != -1 &&
179 adapter->intr_scheme != INTR_SCHEME_PERPORT)
180 writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
181
182 /* Window = 0 or 1 */
183 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
184 do {
185 writel(0xffffffff,
186 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
187 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
188 if (!(mask & 0x80))
189 break;
190 udelay(10);
191 } while (--retries);
192
193 if (!retries) {
194 printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
195 netxen_nic_driver_name);
196 }
197 }
198
199 DPRINTK(1, INFO, "Done with Disable Int\n");
200 }
201
202 static void netxen_nic_enable_int(struct netxen_adapter *adapter)
203 {
204 u32 mask;
205
206 DPRINTK(1, INFO, "Entered ISR Enable \n");
207
208 if (adapter->intr_scheme != -1 &&
209 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
210 switch (adapter->ahw.board_type) {
211 case NETXEN_NIC_GBE:
212 mask = 0x77b;
213 break;
214 case NETXEN_NIC_XGBE:
215 mask = 0x77f;
216 break;
217 default:
218 mask = 0x7ff;
219 break;
220 }
221
222 writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
223 }
224
225 switch (adapter->portnum) {
226 case 0:
227 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_0));
228 break;
229 case 1:
230 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_1));
231 break;
232 case 2:
233 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_2));
234 break;
235 case 3:
236 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_3));
237 break;
238 }
239
240 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
241 mask = 0xbff;
242 if (adapter->intr_scheme != -1 &&
243 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
244 writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
245 }
246 writel(mask,
247 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
248 }
249
250 DPRINTK(1, INFO, "Done with enable Int\n");
251 }
252
253 /*
254 * netxen_nic_probe()
255 *
256 * The Linux system will invoke this after identifying the vendor ID and
257 * device Id in the pci_tbl supported by this module.
258 *
259 * A quad port card has one operational PCI config space, (function 0),
260 * which is used to access all four ports.
261 *
262 * This routine will initialize the adapter, and setup the global parameters
263 * along with the port's specific structure.
264 */
265 static int __devinit
266 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
267 {
268 struct net_device *netdev = NULL;
269 struct netxen_adapter *adapter = NULL;
270 void __iomem *mem_ptr0 = NULL;
271 void __iomem *mem_ptr1 = NULL;
272 void __iomem *mem_ptr2 = NULL;
273 unsigned long first_page_group_end;
274 unsigned long first_page_group_start;
275
276
277 u8 __iomem *db_ptr = NULL;
278 unsigned long mem_base, mem_len, db_base, db_len;
279 int pci_using_dac, i = 0, err;
280 int ring;
281 struct netxen_recv_context *recv_ctx = NULL;
282 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
283 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
284 u64 mac_addr[FLASH_NUM_PORTS + 1];
285 int valid_mac = 0;
286 u32 val;
287 int pci_func_id = PCI_FUNC(pdev->devfn);
288
289 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
290
291 if (pdev->class != 0x020000) {
292 printk(KERN_ERR"NetXen function %d, class %x will not"
293 "be enabled.\n",pci_func_id, pdev->class);
294 return -ENODEV;
295 }
296 if ((err = pci_enable_device(pdev)))
297 return err;
298 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
299 err = -ENODEV;
300 goto err_out_disable_pdev;
301 }
302
303 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
304 goto err_out_disable_pdev;
305
306 pci_set_master(pdev);
307 if (pdev->revision == NX_P2_C1 &&
308 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
309 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
310 pci_using_dac = 1;
311 } else {
312 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
313 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
314 goto err_out_free_res;
315
316 pci_using_dac = 0;
317 }
318
319
320 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
321 if(!netdev) {
322 printk(KERN_ERR"%s: Failed to allocate memory for the "
323 "device block.Check system memory resource"
324 " usage.\n", netxen_nic_driver_name);
325 goto err_out_free_res;
326 }
327
328 SET_MODULE_OWNER(netdev);
329 SET_NETDEV_DEV(netdev, &pdev->dev);
330
331 adapter = netdev->priv;
332
333 adapter->ahw.pdev = pdev;
334 adapter->ahw.pci_func = pci_func_id;
335 spin_lock_init(&adapter->tx_lock);
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 == 0UL) && (mem_len == NETXEN_PCI_128MB_SIZE)) ||
362 (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
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
409 /* This will be reset for mezz cards */
410 adapter->portnum = pci_func_id;
411 adapter->status &= ~NETXEN_NETDEV_STATUS;
412
413 netdev->open = netxen_nic_open;
414 netdev->stop = netxen_nic_close;
415 netdev->hard_start_xmit = netxen_nic_xmit_frame;
416 netdev->get_stats = netxen_nic_get_stats;
417 netdev->set_multicast_list = netxen_nic_set_multi;
418 netdev->set_mac_address = netxen_nic_set_mac;
419 netdev->change_mtu = netxen_nic_change_mtu;
420 netdev->tx_timeout = netxen_tx_timeout;
421 netdev->watchdog_timeo = HZ;
422
423 netxen_nic_change_mtu(netdev, netdev->mtu);
424
425 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
426 #ifdef CONFIG_NET_POLL_CONTROLLER
427 netdev->poll_controller = netxen_nic_poll_controller;
428 #endif
429 /* ScatterGather support */
430 netdev->features = NETIF_F_SG;
431 netdev->features |= NETIF_F_IP_CSUM;
432 netdev->features |= NETIF_F_TSO;
433
434 if (pci_using_dac)
435 netdev->features |= NETIF_F_HIGHDMA;
436
437 if (pci_enable_msi(pdev))
438 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
439 else
440 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
441
442 netdev->irq = pdev->irq;
443 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
444
445 /*
446 * Set the CRB window to invalid. If any register in window 0 is
447 * accessed it should set the window to 0 and then reset it to 1.
448 */
449 adapter->curr_window = 255;
450
451 /* initialize the adapter */
452 netxen_initialize_adapter_hw(adapter);
453
454 /*
455 * Adapter in our case is quad port so initialize it before
456 * initializing the ports
457 */
458
459 netxen_initialize_adapter_ops(adapter);
460
461 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
462 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
463 (adapter->ahw.boardcfg.board_type ==
464 NETXEN_BRDTYPE_P2_SB31_2G))
465 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
466 else
467 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
468 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
469 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
470
471 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
472 if (cmd_buf_arr == NULL) {
473 printk(KERN_ERR
474 "%s: Could not allocate cmd_buf_arr memory:%d\n",
475 netxen_nic_driver_name, (int)TX_RINGSIZE);
476 err = -ENOMEM;
477 goto err_out_free_adapter;
478 }
479 memset(cmd_buf_arr, 0, TX_RINGSIZE);
480 adapter->cmd_buf_arr = cmd_buf_arr;
481
482 for (i = 0; i < MAX_RCV_CTX; ++i) {
483 recv_ctx = &adapter->recv_ctx[i];
484 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
485 rcv_desc = &recv_ctx->rcv_desc[ring];
486 switch (RCV_DESC_TYPE(ring)) {
487 case RCV_DESC_NORMAL:
488 rcv_desc->max_rx_desc_count =
489 adapter->max_rx_desc_count;
490 rcv_desc->flags = RCV_DESC_NORMAL;
491 rcv_desc->dma_size = RX_DMA_MAP_LEN;
492 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
493 break;
494
495 case RCV_DESC_JUMBO:
496 rcv_desc->max_rx_desc_count =
497 adapter->max_jumbo_rx_desc_count;
498 rcv_desc->flags = RCV_DESC_JUMBO;
499 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
500 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
501 break;
502
503 case RCV_RING_LRO:
504 rcv_desc->max_rx_desc_count =
505 adapter->max_lro_rx_desc_count;
506 rcv_desc->flags = RCV_DESC_LRO;
507 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
508 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
509 break;
510
511 }
512 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
513 vmalloc(RCV_BUFFSIZE);
514
515 if (rcv_desc->rx_buf_arr == NULL) {
516 printk(KERN_ERR "%s: Could not allocate"
517 "rcv_desc->rx_buf_arr memory:%d\n",
518 netxen_nic_driver_name,
519 (int)RCV_BUFFSIZE);
520 err = -ENOMEM;
521 goto err_out_free_rx_buffer;
522 }
523 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
524 }
525
526 }
527
528 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
529
530 /* Mezz cards have PCI function 0,2,3 enabled */
531 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
532 && (pci_func_id >= 2))
533 adapter->portnum = pci_func_id - 2;
534
535 #ifdef CONFIG_IA64
536 if(adapter->portnum == 0) {
537 netxen_pinit_from_rom(adapter, 0);
538 udelay(500);
539 netxen_load_firmware(adapter);
540 }
541 #endif
542
543 init_timer(&adapter->watchdog_timer);
544 adapter->ahw.xg_linkup = 0;
545 adapter->watchdog_timer.function = &netxen_watchdog;
546 adapter->watchdog_timer.data = (unsigned long)adapter;
547 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
548 adapter->ahw.pdev = pdev;
549 adapter->proc_cmd_buf_counter = 0;
550 adapter->ahw.revision_id = pdev->revision;
551
552 /* make sure Window == 1 */
553 netxen_nic_pci_change_crbwindow(adapter, 1);
554
555 netxen_nic_update_cmd_producer(adapter, 0);
556 netxen_nic_update_cmd_consumer(adapter, 0);
557 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
558
559 if (netxen_is_flash_supported(adapter) == 0 &&
560 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
561 valid_mac = 1;
562 else
563 valid_mac = 0;
564
565 if (valid_mac) {
566 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
567 netdev->dev_addr[0] = *(p + 5);
568 netdev->dev_addr[1] = *(p + 4);
569 netdev->dev_addr[2] = *(p + 3);
570 netdev->dev_addr[3] = *(p + 2);
571 netdev->dev_addr[4] = *(p + 1);
572 netdev->dev_addr[5] = *(p + 0);
573
574 memcpy(netdev->perm_addr, netdev->dev_addr,
575 netdev->addr_len);
576 if (!is_valid_ether_addr(netdev->perm_addr)) {
577 printk(KERN_ERR "%s: Bad MAC address "
578 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
579 netxen_nic_driver_name,
580 netdev->dev_addr[0],
581 netdev->dev_addr[1],
582 netdev->dev_addr[2],
583 netdev->dev_addr[3],
584 netdev->dev_addr[4],
585 netdev->dev_addr[5]);
586 } else {
587 if (adapter->macaddr_set)
588 adapter->macaddr_set(adapter,
589 netdev->dev_addr);
590 }
591 }
592
593 if (adapter->portnum == 0) {
594 err = netxen_initialize_adapter_offload(adapter);
595 if (err)
596 goto err_out_free_rx_buffer;
597 val = readl(NETXEN_CRB_NORMALIZE(adapter,
598 NETXEN_CAM_RAM(0x1fc)));
599 if (val == 0x55555555) {
600 /* This is the first boot after power up */
601 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
602 if (!(val & 0x4)) {
603 val |= 0x4;
604 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
605 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
606 if (!(val & 0x4))
607 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
608 netxen_nic_driver_name);
609 }
610 val = readl(NETXEN_CRB_NORMALIZE(adapter,
611 NETXEN_ROMUSB_GLB_SW_RESET));
612 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
613 if (val != 0x80000f) {
614 /* clear the register for future unloads/loads */
615 writel(0, NETXEN_CRB_NORMALIZE(adapter,
616 NETXEN_CAM_RAM(0x1fc)));
617 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
618 err = -ENODEV;
619 goto err_out_free_dev;
620 }
621 }
622
623 /* clear the register for future unloads/loads */
624 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
625 printk(KERN_INFO "State: 0x%0x\n",
626 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
627
628 /*
629 * Tell the hardware our version number.
630 */
631 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
632 | ((_NETXEN_NIC_LINUX_MINOR << 8))
633 | (_NETXEN_NIC_LINUX_SUBVERSION);
634 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
635
636 /* Unlock the HW, prompting the boot sequence */
637 writel(1,
638 NETXEN_CRB_NORMALIZE(adapter,
639 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
640 /* Handshake with the card before we register the devices. */
641 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
642 }
643
644 /*
645 * See if the firmware gave us a virtual-physical port mapping.
646 */
647 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
648 if (i != 0x55555555)
649 physical_port[adapter->portnum] = i;
650
651 netif_carrier_off(netdev);
652 netif_stop_queue(netdev);
653
654 if ((err = register_netdev(netdev))) {
655 printk(KERN_ERR "%s: register_netdev failed port #%d"
656 " aborting\n", netxen_nic_driver_name,
657 adapter->portnum);
658 err = -EIO;
659 goto err_out_free_dev;
660 }
661
662 pci_set_drvdata(pdev, adapter);
663
664 switch (adapter->ahw.board_type) {
665 case NETXEN_NIC_GBE:
666 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
667 netxen_nic_driver_name);
668 break;
669
670 case NETXEN_NIC_XGBE:
671 printk(KERN_INFO "%s: XGbE board initialized\n",
672 netxen_nic_driver_name);
673 break;
674 }
675
676 adapter->driver_mismatch = 0;
677
678 return 0;
679
680 err_out_free_dev:
681 if (adapter->portnum == 0)
682 netxen_free_adapter_offload(adapter);
683
684 err_out_free_rx_buffer:
685 for (i = 0; i < MAX_RCV_CTX; ++i) {
686 recv_ctx = &adapter->recv_ctx[i];
687 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
688 rcv_desc = &recv_ctx->rcv_desc[ring];
689 if (rcv_desc->rx_buf_arr != NULL) {
690 vfree(rcv_desc->rx_buf_arr);
691 rcv_desc->rx_buf_arr = NULL;
692 }
693 }
694 }
695 vfree(cmd_buf_arr);
696
697 err_out_free_adapter:
698 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
699 pci_disable_msi(pdev);
700
701 pci_set_drvdata(pdev, NULL);
702
703 if (db_ptr)
704 iounmap(db_ptr);
705
706 err_out_iounmap:
707 if (mem_ptr0)
708 iounmap(mem_ptr0);
709 if (mem_ptr1)
710 iounmap(mem_ptr1);
711 if (mem_ptr2)
712 iounmap(mem_ptr2);
713
714 err_out_free_netdev:
715 free_netdev(netdev);
716
717 err_out_free_res:
718 pci_release_regions(pdev);
719
720 err_out_disable_pdev:
721 pci_disable_device(pdev);
722 return err;
723 }
724
725 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
726 {
727 struct netxen_adapter *adapter;
728 struct net_device *netdev;
729 struct netxen_rx_buffer *buffer;
730 struct netxen_recv_context *recv_ctx;
731 struct netxen_rcv_desc_ctx *rcv_desc;
732 int i, ctxid, ring;
733 static int init_firmware_done = 0;
734
735 adapter = pci_get_drvdata(pdev);
736 if (adapter == NULL)
737 return;
738
739 netdev = adapter->netdev;
740
741 unregister_netdev(netdev);
742
743 if (adapter->stop_port)
744 adapter->stop_port(adapter);
745
746 netxen_nic_disable_int(adapter);
747
748 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
749 init_firmware_done++;
750 netxen_free_hw_resources(adapter);
751 }
752
753 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
754 recv_ctx = &adapter->recv_ctx[ctxid];
755 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
756 rcv_desc = &recv_ctx->rcv_desc[ring];
757 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
758 buffer = &(rcv_desc->rx_buf_arr[i]);
759 if (buffer->state == NETXEN_BUFFER_FREE)
760 continue;
761 pci_unmap_single(pdev, buffer->dma,
762 rcv_desc->dma_size,
763 PCI_DMA_FROMDEVICE);
764 if (buffer->skb != NULL)
765 dev_kfree_skb_any(buffer->skb);
766 }
767 vfree(rcv_desc->rx_buf_arr);
768 }
769 }
770
771 vfree(adapter->cmd_buf_arr);
772
773 if (adapter->portnum == 0) {
774 if (init_firmware_done) {
775 i = 100;
776 do {
777 if (dma_watchdog_shutdown_request(adapter) == 1)
778 break;
779 msleep(100);
780 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
781 break;
782 } while (--i);
783
784 if (i == 0)
785 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
786 netdev->name);
787
788 /* clear the register for future unloads/loads */
789 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
790 printk(KERN_INFO "State: 0x%0x\n",
791 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
792
793 /* leave the hw in the same state as reboot */
794 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
795 netxen_pinit_from_rom(adapter, 0);
796 msleep(1);
797 netxen_load_firmware(adapter);
798 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
799 }
800
801 /* clear the register for future unloads/loads */
802 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
803 printk(KERN_INFO "State: 0x%0x\n",
804 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
805
806 i = 100;
807 do {
808 if (dma_watchdog_shutdown_request(adapter) == 1)
809 break;
810 msleep(100);
811 if (dma_watchdog_shutdown_poll_result(adapter) == 1)
812 break;
813 } while (--i);
814
815 if (i) {
816 netxen_free_adapter_offload(adapter);
817 } else {
818 printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
819 netdev->name);
820 }
821 }
822
823 if (adapter->irq)
824 free_irq(adapter->irq, adapter);
825
826 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
827 pci_disable_msi(pdev);
828
829 iounmap(adapter->ahw.db_base);
830 iounmap(adapter->ahw.pci_base0);
831 iounmap(adapter->ahw.pci_base1);
832 iounmap(adapter->ahw.pci_base2);
833
834 pci_release_regions(pdev);
835 pci_disable_device(pdev);
836 pci_set_drvdata(pdev, NULL);
837
838 free_netdev(netdev);
839 }
840
841 /*
842 * Called when a network interface is made active
843 * @returns 0 on success, negative value on failure
844 */
845 static int netxen_nic_open(struct net_device *netdev)
846 {
847 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
848 int err = 0;
849 int ctx, ring;
850
851 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
852 err = netxen_init_firmware(adapter);
853 if (err != 0) {
854 printk(KERN_ERR "Failed to init firmware\n");
855 return -EIO;
856 }
857 netxen_nic_flash_print(adapter);
858
859 /* setup all the resources for the Phantom... */
860 /* this include the descriptors for rcv, tx, and status */
861 netxen_nic_clear_stats(adapter);
862 err = netxen_nic_hw_resources(adapter);
863 if (err) {
864 printk(KERN_ERR "Error in setting hw resources:%d\n",
865 err);
866 return err;
867 }
868 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
869 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
870 netxen_post_rx_buffers(adapter, ctx, ring);
871 }
872 adapter->irq = adapter->ahw.pdev->irq;
873 err = request_irq(adapter->ahw.pdev->irq, netxen_intr,
874 IRQF_SHARED|IRQF_SAMPLE_RANDOM, netdev->name,
875 adapter);
876 if (err) {
877 printk(KERN_ERR "request_irq failed with: %d\n", err);
878 netxen_free_hw_resources(adapter);
879 return err;
880 }
881
882 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
883 }
884 if (!adapter->driver_mismatch)
885 mod_timer(&adapter->watchdog_timer, jiffies);
886
887 napi_enable(&adapter->napi);
888
889 netxen_nic_enable_int(adapter);
890
891 /* Done here again so that even if phantom sw overwrote it,
892 * we set it */
893 if (adapter->init_port
894 && adapter->init_port(adapter, adapter->portnum) != 0) {
895 del_timer_sync(&adapter->watchdog_timer);
896 printk(KERN_ERR "%s: Failed to initialize port %d\n",
897 netxen_nic_driver_name, adapter->portnum);
898 napi_disable(&adapter->napi);
899 return -EIO;
900 }
901 if (adapter->macaddr_set)
902 adapter->macaddr_set(adapter, netdev->dev_addr);
903
904 netxen_nic_set_link_parameters(adapter);
905
906 netxen_nic_set_multi(netdev);
907 if (adapter->set_mtu)
908 adapter->set_mtu(adapter, netdev->mtu);
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 netxen_nic_disable_int(adapter);
931
932 cmd_buff = adapter->cmd_buf_arr;
933 for (i = 0; i < adapter->max_tx_desc_count; i++) {
934 buffrag = cmd_buff->frag_array;
935 if (buffrag->dma) {
936 pci_unmap_single(adapter->pdev, buffrag->dma,
937 buffrag->length, PCI_DMA_TODEVICE);
938 buffrag->dma = 0ULL;
939 }
940 for (j = 0; j < cmd_buff->frag_count; j++) {
941 buffrag++;
942 if (buffrag->dma) {
943 pci_unmap_page(adapter->pdev, buffrag->dma,
944 buffrag->length,
945 PCI_DMA_TODEVICE);
946 buffrag->dma = 0ULL;
947 }
948 }
949 /* Free the skb we received in netxen_nic_xmit_frame */
950 if (cmd_buff->skb) {
951 dev_kfree_skb_any(cmd_buff->skb);
952 cmd_buff->skb = NULL;
953 }
954 cmd_buff++;
955 }
956 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
957 FLUSH_SCHEDULED_WORK();
958 del_timer_sync(&adapter->watchdog_timer);
959 }
960
961 return 0;
962 }
963
964 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
965 {
966 struct netxen_adapter *adapter = netdev_priv(netdev);
967 struct netxen_hardware_context *hw = &adapter->ahw;
968 unsigned int first_seg_len = skb->len - skb->data_len;
969 struct netxen_skb_frag *buffrag;
970 unsigned int i;
971
972 u32 producer = 0;
973 u32 saved_producer = 0;
974 struct cmd_desc_type0 *hwdesc;
975 int k;
976 struct netxen_cmd_buffer *pbuf = NULL;
977 static int dropped_packet = 0;
978 int frag_count;
979 u32 local_producer = 0;
980 u32 max_tx_desc_count = 0;
981 u32 last_cmd_consumer = 0;
982 int no_of_desc;
983
984 adapter->stats.xmitcalled++;
985 frag_count = skb_shinfo(skb)->nr_frags + 1;
986
987 if (unlikely(skb->len <= 0)) {
988 dev_kfree_skb_any(skb);
989 adapter->stats.badskblen++;
990 return NETDEV_TX_OK;
991 }
992
993 if (frag_count > MAX_BUFFERS_PER_CMD) {
994 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
995 "too large, can handle only %d frags\n",
996 netxen_nic_driver_name, netdev->name,
997 frag_count, MAX_BUFFERS_PER_CMD);
998 adapter->stats.txdropped++;
999 if ((++dropped_packet & 0xff) == 0xff)
1000 printk("%s: %s droppped packets = %d\n",
1001 netxen_nic_driver_name, netdev->name,
1002 dropped_packet);
1003
1004 return NETDEV_TX_OK;
1005 }
1006
1007 /*
1008 * Everything is set up. Now, we just need to transmit it out.
1009 * Note that we have to copy the contents of buffer over to
1010 * right place. Later on, this can be optimized out by de-coupling the
1011 * producer index from the buffer index.
1012 */
1013 retry_getting_window:
1014 spin_lock_bh(&adapter->tx_lock);
1015 if (adapter->total_threads >= MAX_XMIT_PRODUCERS) {
1016 spin_unlock_bh(&adapter->tx_lock);
1017 /*
1018 * Yield CPU
1019 */
1020 if (!in_atomic())
1021 schedule();
1022 else {
1023 for (i = 0; i < 20; i++)
1024 cpu_relax(); /*This a nop instr on i386 */
1025 }
1026 goto retry_getting_window;
1027 }
1028 local_producer = adapter->cmd_producer;
1029 /* There 4 fragments per descriptor */
1030 no_of_desc = (frag_count + 3) >> 2;
1031 if (netdev->features & NETIF_F_TSO) {
1032 if (skb_shinfo(skb)->gso_size > 0) {
1033
1034 no_of_desc++;
1035 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
1036 sizeof(struct ethhdr)) >
1037 (sizeof(struct cmd_desc_type0) - 2)) {
1038 no_of_desc++;
1039 }
1040 }
1041 }
1042 k = adapter->cmd_producer;
1043 max_tx_desc_count = adapter->max_tx_desc_count;
1044 last_cmd_consumer = adapter->last_cmd_consumer;
1045 if ((k + no_of_desc) >=
1046 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
1047 last_cmd_consumer)) {
1048 netif_stop_queue(netdev);
1049 adapter->flags |= NETXEN_NETDEV_STATUS;
1050 spin_unlock_bh(&adapter->tx_lock);
1051 return NETDEV_TX_BUSY;
1052 }
1053 k = get_index_range(k, max_tx_desc_count, no_of_desc);
1054 adapter->cmd_producer = k;
1055 adapter->total_threads++;
1056 adapter->num_threads++;
1057
1058 spin_unlock_bh(&adapter->tx_lock);
1059 /* Copy the descriptors into the hardware */
1060 producer = local_producer;
1061 saved_producer = producer;
1062 hwdesc = &hw->cmd_desc_head[producer];
1063 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1064 /* Take skb->data itself */
1065 pbuf = &adapter->cmd_buf_arr[producer];
1066 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
1067 pbuf->mss = skb_shinfo(skb)->gso_size;
1068 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
1069 } else {
1070 pbuf->mss = 0;
1071 hwdesc->mss = 0;
1072 }
1073 pbuf->total_length = skb->len;
1074 pbuf->skb = skb;
1075 pbuf->cmd = TX_ETHER_PKT;
1076 pbuf->frag_count = frag_count;
1077 pbuf->port = adapter->portnum;
1078 buffrag = &pbuf->frag_array[0];
1079 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
1080 PCI_DMA_TODEVICE);
1081 buffrag->length = first_seg_len;
1082 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
1083 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
1084 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
1085
1086 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
1087 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
1088 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1089 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1090
1091 for (i = 1, k = 1; i < frag_count; i++, k++) {
1092 struct skb_frag_struct *frag;
1093 int len, temp_len;
1094 unsigned long offset;
1095 dma_addr_t temp_dma;
1096
1097 /* move to next desc. if there is a need */
1098 if ((i & 0x3) == 0) {
1099 k = 0;
1100 producer = get_next_index(producer,
1101 adapter->max_tx_desc_count);
1102 hwdesc = &hw->cmd_desc_head[producer];
1103 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1104 }
1105 frag = &skb_shinfo(skb)->frags[i - 1];
1106 len = frag->size;
1107 offset = frag->page_offset;
1108
1109 temp_len = len;
1110 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
1111 len, PCI_DMA_TODEVICE);
1112
1113 buffrag++;
1114 buffrag->dma = temp_dma;
1115 buffrag->length = temp_len;
1116
1117 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
1118 switch (k) {
1119 case 0:
1120 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1121 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1122 break;
1123 case 1:
1124 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1125 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1126 break;
1127 case 2:
1128 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1129 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1130 break;
1131 case 3:
1132 hwdesc->buffer4_length = cpu_to_le16(temp_len);
1133 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1134 break;
1135 }
1136 frag++;
1137 }
1138 producer = get_next_index(producer, adapter->max_tx_desc_count);
1139
1140 /* might change opcode to TX_TCP_LSO */
1141 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1142
1143 /* For LSO, we need to copy the MAC/IP/TCP headers into
1144 * the descriptor ring
1145 */
1146 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1147 == TX_TCP_LSO) {
1148 int hdr_len, first_hdr_len, more_hdr;
1149 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1150 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1151 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1152 more_hdr = 1;
1153 } else {
1154 first_hdr_len = hdr_len;
1155 more_hdr = 0;
1156 }
1157 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1158 hwdesc = &hw->cmd_desc_head[producer];
1159
1160 /* copy the first 64 bytes */
1161 memcpy(((void *)hwdesc) + 2,
1162 (void *)(skb->data), first_hdr_len);
1163 producer = get_next_index(producer, max_tx_desc_count);
1164
1165 if (more_hdr) {
1166 hwdesc = &hw->cmd_desc_head[producer];
1167 /* copy the next 64 bytes - should be enough except
1168 * for pathological case
1169 */
1170 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1171 hwdesc,
1172 (hdr_len -
1173 first_hdr_len));
1174 producer = get_next_index(producer, max_tx_desc_count);
1175 }
1176 }
1177
1178 i = netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
1179
1180 hw->cmd_desc_head[saved_producer].flags_opcode =
1181 cpu_to_le16(hw->cmd_desc_head[saved_producer].flags_opcode);
1182 hw->cmd_desc_head[saved_producer].num_of_buffers_total_length =
1183 cpu_to_le32(hw->cmd_desc_head[saved_producer].
1184 num_of_buffers_total_length);
1185
1186 spin_lock_bh(&adapter->tx_lock);
1187 adapter->stats.txbytes += i;
1188
1189 /* Code to update the adapter considering how many producer threads
1190 are currently working */
1191 if ((--adapter->num_threads) == 0) {
1192 /* This is the last thread */
1193 u32 crb_producer = adapter->cmd_producer;
1194 netxen_nic_update_cmd_producer(adapter, crb_producer);
1195 wmb();
1196 adapter->total_threads = 0;
1197 }
1198
1199 adapter->stats.xmitfinished++;
1200 spin_unlock_bh(&adapter->tx_lock);
1201
1202 netdev->trans_start = jiffies;
1203
1204 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
1205
1206 DPRINTK(INFO, "Done. Send\n");
1207 return NETDEV_TX_OK;
1208 }
1209
1210 static void netxen_watchdog(unsigned long v)
1211 {
1212 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1213
1214 SCHEDULE_WORK(&adapter->watchdog_task);
1215 }
1216
1217 static void netxen_tx_timeout(struct net_device *netdev)
1218 {
1219 struct netxen_adapter *adapter = (struct netxen_adapter *)
1220 netdev_priv(netdev);
1221 SCHEDULE_WORK(&adapter->tx_timeout_task);
1222 }
1223
1224 static void netxen_tx_timeout_task(struct work_struct *work)
1225 {
1226 struct netxen_adapter *adapter =
1227 container_of(work, struct netxen_adapter, tx_timeout_task);
1228
1229 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1230 netxen_nic_driver_name, adapter->netdev->name);
1231
1232 netxen_nic_close(adapter->netdev);
1233 netxen_nic_open(adapter->netdev);
1234 adapter->netdev->trans_start = jiffies;
1235 netif_wake_queue(adapter->netdev);
1236 }
1237
1238 static int
1239 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
1240 {
1241 u32 ret = 0;
1242
1243 DPRINTK(INFO, "Entered handle ISR\n");
1244 adapter->stats.ints++;
1245
1246 netxen_nic_disable_int(adapter);
1247
1248 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
1249 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1250 /*
1251 * Interrupts are already disabled.
1252 */
1253 __netif_rx_schedule(netdev, &adapter->napi);
1254 } else {
1255 static unsigned int intcount = 0;
1256 if ((++intcount & 0xfff) == 0xfff)
1257 DPRINTK(KERN_ERR
1258 "%s: %s interrupt %d while in poll\n",
1259 netxen_nic_driver_name, netdev->name,
1260 intcount);
1261 }
1262 ret = 1;
1263 }
1264
1265 if (ret == 0) {
1266 netxen_nic_enable_int(adapter);
1267 }
1268
1269 return ret;
1270 }
1271
1272 /*
1273 * netxen_intr - Interrupt Handler
1274 * @irq: interrupt number
1275 * data points to adapter stucture (which may be handling more than 1 port
1276 */
1277 irqreturn_t netxen_intr(int irq, void *data)
1278 {
1279 struct netxen_adapter *adapter;
1280 struct net_device *netdev;
1281 u32 our_int = 0;
1282
1283 if (unlikely(!irq)) {
1284 return IRQ_NONE; /* Not our interrupt */
1285 }
1286
1287 adapter = (struct netxen_adapter *)data;
1288 netdev = adapter->netdev;
1289
1290 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1291 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1292 /* not our interrupt */
1293 if ((our_int & (0x80 << adapter->portnum)) == 0)
1294 return IRQ_NONE;
1295 }
1296
1297 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1298 /* claim interrupt */
1299 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1300 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
1301 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1302 }
1303 }
1304
1305 if (netif_running(netdev))
1306 netxen_handle_int(adapter, netdev);
1307
1308 return IRQ_HANDLED;
1309 }
1310
1311 static int netxen_nic_poll(struct napi_struct *napi, int budget)
1312 {
1313 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
1314 struct net_device *netdev = adapter->netdev;
1315 int done = 1;
1316 int ctx;
1317 int work_done;
1318
1319 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1320
1321 work_done = 0;
1322 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1323 /*
1324 * Fairness issue. This will give undue weight to the
1325 * receive context 0.
1326 */
1327
1328 /*
1329 * To avoid starvation, we give each of our receivers,
1330 * a fraction of the quota. Sometimes, it might happen that we
1331 * have enough quota to process every packet, but since all the
1332 * packets are on one context, it gets only half of the quota,
1333 * and ends up not processing it.
1334 */
1335 work_done += netxen_process_rcv_ring(adapter, ctx,
1336 budget / MAX_RCV_CTX);
1337 }
1338
1339 if (work_done >= budget && netxen_nic_rx_has_work(adapter) != 0)
1340 done = 0;
1341
1342 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1343 done = 0;
1344
1345 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1346 work_done, work_to_do);
1347 if (done) {
1348 netif_rx_complete(netdev, napi);
1349 netxen_nic_enable_int(adapter);
1350 }
1351
1352 return work_done;
1353 }
1354
1355 #ifdef CONFIG_NET_POLL_CONTROLLER
1356 static void netxen_nic_poll_controller(struct net_device *netdev)
1357 {
1358 struct netxen_adapter *adapter = netdev_priv(netdev);
1359 disable_irq(adapter->irq);
1360 netxen_intr(adapter->irq, adapter);
1361 enable_irq(adapter->irq);
1362 }
1363 #endif
1364
1365 static struct pci_driver netxen_driver = {
1366 .name = netxen_nic_driver_name,
1367 .id_table = netxen_pci_tbl,
1368 .probe = netxen_nic_probe,
1369 .remove = __devexit_p(netxen_nic_remove)
1370 };
1371
1372 /* Driver Registration on NetXen card */
1373
1374 static int __init netxen_init_module(void)
1375 {
1376 if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
1377 return -ENOMEM;
1378
1379 return pci_register_driver(&netxen_driver);
1380 }
1381
1382 module_init(netxen_init_module);
1383
1384 static void __exit netxen_exit_module(void)
1385 {
1386 /*
1387 * Wait for some time to allow the dma to drain, if any.
1388 */
1389 msleep(100);
1390 pci_unregister_driver(&netxen_driver);
1391 destroy_workqueue(netxen_workq);
1392 }
1393
1394 module_exit(netxen_exit_module);
linux kernel for loongson