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Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
[mirror_ubuntu-artful-kernel.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 <linux/vmalloc.h>
43 #include <net/ip.h>
44
45 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
46 MODULE_LICENSE("GPL");
47 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
48
49 char netxen_nic_driver_name[] = "netxen-nic";
50 static char netxen_nic_driver_string[] = "NetXen Network Driver version "
51 NETXEN_NIC_LINUX_VERSIONID;
52
53 #define NETXEN_NETDEV_WEIGHT 120
54 #define NETXEN_ADAPTER_UP_MAGIC 777
55 #define NETXEN_NIC_PEG_TUNE 0
56
57 #define DMA_32BIT_MASK 0x00000000ffffffffULL
58 #define DMA_35BIT_MASK 0x00000007ffffffffULL
59
60 /* Local functions to NetXen NIC driver */
61 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
62 const struct pci_device_id *ent);
63 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
64 static int netxen_nic_open(struct net_device *netdev);
65 static int netxen_nic_close(struct net_device *netdev);
66 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
67 static void netxen_tx_timeout(struct net_device *netdev);
68 static void netxen_tx_timeout_task(struct work_struct *work);
69 static void netxen_watchdog(unsigned long);
70 static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
71 static int netxen_nic_poll(struct net_device *dev, int *budget);
72 #ifdef CONFIG_NET_POLL_CONTROLLER
73 static void netxen_nic_poll_controller(struct net_device *netdev);
74 #endif
75 static irqreturn_t netxen_intr(int irq, void *data);
76
77 int physical_port[] = {0, 1, 2, 3};
78
79 /* PCI Device ID Table */
80 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
81 {PCI_DEVICE(0x4040, 0x0001)},
82 {PCI_DEVICE(0x4040, 0x0002)},
83 {PCI_DEVICE(0x4040, 0x0003)},
84 {PCI_DEVICE(0x4040, 0x0004)},
85 {PCI_DEVICE(0x4040, 0x0005)},
86 {PCI_DEVICE(0x4040, 0x0024)},
87 {PCI_DEVICE(0x4040, 0x0025)},
88 {0,}
89 };
90
91 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
92
93 struct workqueue_struct *netxen_workq;
94 static void netxen_watchdog(unsigned long);
95
96 static inline void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
97 uint32_t crb_producer)
98 {
99 switch (adapter->portnum) {
100 case 0:
101 writel(crb_producer, NETXEN_CRB_NORMALIZE
102 (adapter, CRB_CMD_PRODUCER_OFFSET));
103 return;
104 case 1:
105 writel(crb_producer, NETXEN_CRB_NORMALIZE
106 (adapter, CRB_CMD_PRODUCER_OFFSET_1));
107 return;
108 case 2:
109 writel(crb_producer, NETXEN_CRB_NORMALIZE
110 (adapter, CRB_CMD_PRODUCER_OFFSET_2));
111 return;
112 case 3:
113 writel(crb_producer, NETXEN_CRB_NORMALIZE
114 (adapter, CRB_CMD_PRODUCER_OFFSET_3));
115 return;
116 default:
117 printk(KERN_WARNING "We tried to update "
118 "CRB_CMD_PRODUCER_OFFSET for invalid "
119 "PCI function id %d\n",
120 adapter->portnum);
121 return;
122 }
123 }
124
125 static inline void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
126 u32 crb_consumer)
127 {
128 switch (adapter->portnum) {
129 case 0:
130 writel(crb_consumer, NETXEN_CRB_NORMALIZE
131 (adapter, CRB_CMD_CONSUMER_OFFSET));
132 return;
133 case 1:
134 writel(crb_consumer, NETXEN_CRB_NORMALIZE
135 (adapter, CRB_CMD_CONSUMER_OFFSET_1));
136 return;
137 case 2:
138 writel(crb_consumer, NETXEN_CRB_NORMALIZE
139 (adapter, CRB_CMD_CONSUMER_OFFSET_2));
140 return;
141 case 3:
142 writel(crb_consumer, NETXEN_CRB_NORMALIZE
143 (adapter, CRB_CMD_CONSUMER_OFFSET_3));
144 return;
145 default:
146 printk(KERN_WARNING "We tried to update "
147 "CRB_CMD_PRODUCER_OFFSET for invalid "
148 "PCI function id %d\n",
149 adapter->portnum);
150 return;
151 }
152 }
153
154 #define ADAPTER_LIST_SIZE 12
155 int netxen_cards_found;
156
157 static void netxen_nic_disable_int(struct netxen_adapter *adapter)
158 {
159 uint32_t mask = 0x7ff;
160 int retries = 32;
161
162 DPRINTK(1, INFO, "Entered ISR Disable \n");
163
164 switch (adapter->portnum) {
165 case 0:
166 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_0));
167 break;
168 case 1:
169 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_1));
170 break;
171 case 2:
172 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_2));
173 break;
174 case 3:
175 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_3));
176 break;
177 }
178
179 if (adapter->intr_scheme != -1 &&
180 adapter->intr_scheme != INTR_SCHEME_PERPORT)
181 writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
182
183 /* Window = 0 or 1 */
184 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
185 do {
186 writel(0xffffffff,
187 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
188 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
189 if (!(mask & 0x80))
190 break;
191 udelay(10);
192 } while (--retries);
193
194 if (!retries) {
195 printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
196 netxen_nic_driver_name);
197 }
198 }
199
200 DPRINTK(1, INFO, "Done with Disable Int\n");
201 }
202
203 static void netxen_nic_enable_int(struct netxen_adapter *adapter)
204 {
205 u32 mask;
206
207 DPRINTK(1, INFO, "Entered ISR Enable \n");
208
209 if (adapter->intr_scheme != -1 &&
210 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
211 switch (adapter->ahw.board_type) {
212 case NETXEN_NIC_GBE:
213 mask = 0x77b;
214 break;
215 case NETXEN_NIC_XGBE:
216 mask = 0x77f;
217 break;
218 default:
219 mask = 0x7ff;
220 break;
221 }
222
223 writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
224 }
225
226 switch (adapter->portnum) {
227 case 0:
228 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_0));
229 break;
230 case 1:
231 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_1));
232 break;
233 case 2:
234 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_2));
235 break;
236 case 3:
237 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_3));
238 break;
239 }
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 u64 mac_addr[FLASH_NUM_PORTS + 1];
286 int valid_mac = 0;
287 u32 val;
288 int pci_func_id = PCI_FUNC(pdev->devfn);
289
290 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
291
292 if (pdev->class != 0x020000) {
293 printk(KERN_ERR"NetXen function %d, class %x will not"
294 "be enabled.\n",pci_func_id, pdev->class);
295 return -ENODEV;
296 }
297 if ((err = pci_enable_device(pdev)))
298 return err;
299 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
300 err = -ENODEV;
301 goto err_out_disable_pdev;
302 }
303
304 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
305 goto err_out_disable_pdev;
306
307 pci_set_master(pdev);
308 if (pdev->revision == NX_P2_C1 &&
309 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
310 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
311 pci_using_dac = 1;
312 } else {
313 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
314 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
315 goto err_out_free_res;
316
317 pci_using_dac = 0;
318 }
319
320
321 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
322 if(!netdev) {
323 printk(KERN_ERR"%s: Failed to allocate memory for the "
324 "device block.Check system memory resource"
325 " usage.\n", netxen_nic_driver_name);
326 goto err_out_free_res;
327 }
328
329 SET_MODULE_OWNER(netdev);
330 SET_NETDEV_DEV(netdev, &pdev->dev);
331
332 adapter = netdev->priv;
333 memset(adapter, 0 , sizeof(struct netxen_adapter));
334
335 adapter->ahw.pdev = pdev;
336 adapter->ahw.pci_func = pci_func_id;
337 spin_lock_init(&adapter->tx_lock);
338 spin_lock_init(&adapter->lock);
339
340 /* remap phys address */
341 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
342 mem_len = pci_resource_len(pdev, 0);
343
344 /* 128 Meg of memory */
345 if (mem_len == NETXEN_PCI_128MB_SIZE) {
346 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
347 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
348 SECOND_PAGE_GROUP_SIZE);
349 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
350 THIRD_PAGE_GROUP_SIZE);
351 first_page_group_start = FIRST_PAGE_GROUP_START;
352 first_page_group_end = FIRST_PAGE_GROUP_END;
353 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
354 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
355 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
356 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
357 first_page_group_start = 0;
358 first_page_group_end = 0;
359 } else {
360 err = -EIO;
361 goto err_out_free_netdev;
362 }
363
364 if (((mem_ptr0 == 0UL) && (mem_len == NETXEN_PCI_128MB_SIZE)) ||
365 (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
366 DPRINTK(ERR,
367 "Cannot remap adapter memory aborting.:"
368 "0 -> %p, 1 -> %p, 2 -> %p\n",
369 mem_ptr0, mem_ptr1, mem_ptr2);
370
371 err = -EIO;
372 goto err_out_iounmap;
373 }
374 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
375 db_len = pci_resource_len(pdev, 4);
376
377 if (db_len == 0) {
378 printk(KERN_ERR "%s: doorbell is disabled\n",
379 netxen_nic_driver_name);
380 err = -EIO;
381 goto err_out_iounmap;
382 }
383 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
384 db_len);
385
386 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
387 if (!db_ptr) {
388 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
389 netxen_nic_driver_name);
390 err = -EIO;
391 goto err_out_iounmap;
392 }
393 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
394
395 adapter->ahw.pci_base0 = mem_ptr0;
396 adapter->ahw.first_page_group_start = first_page_group_start;
397 adapter->ahw.first_page_group_end = first_page_group_end;
398 adapter->ahw.pci_base1 = mem_ptr1;
399 adapter->ahw.pci_base2 = mem_ptr2;
400 adapter->ahw.db_base = db_ptr;
401 adapter->ahw.db_len = db_len;
402
403 adapter->netdev = netdev;
404 adapter->pdev = pdev;
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 netdev->poll = netxen_nic_poll;
427 netdev->weight = NETXEN_NETDEV_WEIGHT;
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 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
534 && (pci_func_id >= 2))
535 adapter->portnum = pci_func_id - 2;
536
537 #ifdef CONFIG_IA64
538 if(adapter->portnum == 0) {
539 netxen_pinit_from_rom(adapter, 0);
540 udelay(500);
541 netxen_load_firmware(adapter);
542 }
543 #endif
544
545 init_timer(&adapter->watchdog_timer);
546 adapter->ahw.xg_linkup = 0;
547 adapter->watchdog_timer.function = &netxen_watchdog;
548 adapter->watchdog_timer.data = (unsigned long)adapter;
549 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
550 adapter->ahw.pdev = pdev;
551 adapter->proc_cmd_buf_counter = 0;
552 adapter->ahw.revision_id = pdev->revision;
553
554 /* make sure Window == 1 */
555 netxen_nic_pci_change_crbwindow(adapter, 1);
556
557 netxen_nic_update_cmd_producer(adapter, 0);
558 netxen_nic_update_cmd_consumer(adapter, 0);
559 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
560
561 if (netxen_is_flash_supported(adapter) == 0 &&
562 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
563 valid_mac = 1;
564 else
565 valid_mac = 0;
566
567 if (valid_mac) {
568 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
569 netdev->dev_addr[0] = *(p + 5);
570 netdev->dev_addr[1] = *(p + 4);
571 netdev->dev_addr[2] = *(p + 3);
572 netdev->dev_addr[3] = *(p + 2);
573 netdev->dev_addr[4] = *(p + 1);
574 netdev->dev_addr[5] = *(p + 0);
575
576 memcpy(netdev->perm_addr, netdev->dev_addr,
577 netdev->addr_len);
578 if (!is_valid_ether_addr(netdev->perm_addr)) {
579 printk(KERN_ERR "%s: Bad MAC address "
580 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
581 netxen_nic_driver_name,
582 netdev->dev_addr[0],
583 netdev->dev_addr[1],
584 netdev->dev_addr[2],
585 netdev->dev_addr[3],
586 netdev->dev_addr[4],
587 netdev->dev_addr[5]);
588 } else {
589 if (adapter->macaddr_set)
590 adapter->macaddr_set(adapter,
591 netdev->dev_addr);
592 }
593 }
594
595 if (adapter->portnum == 0) {
596 err = netxen_initialize_adapter_offload(adapter);
597 if (err)
598 goto err_out_free_rx_buffer;
599 val = readl(NETXEN_CRB_NORMALIZE(adapter,
600 NETXEN_CAM_RAM(0x1fc)));
601 if (val == 0x55555555) {
602 /* This is the first boot after power up */
603 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
604 if (!(val & 0x4)) {
605 val |= 0x4;
606 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
607 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
608 if (!(val & 0x4))
609 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
610 netxen_nic_driver_name);
611 }
612 val = readl(NETXEN_CRB_NORMALIZE(adapter,
613 NETXEN_ROMUSB_GLB_SW_RESET));
614 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
615 if (val != 0x80000f) {
616 /* clear the register for future unloads/loads */
617 writel(0, NETXEN_CRB_NORMALIZE(adapter,
618 NETXEN_CAM_RAM(0x1fc)));
619 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
620 err = -ENODEV;
621 goto err_out_free_dev;
622 }
623 }
624
625 /* clear the register for future unloads/loads */
626 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
627 printk(KERN_INFO "State: 0x%0x\n",
628 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
629
630 /*
631 * Tell the hardware our version number.
632 */
633 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
634 | ((_NETXEN_NIC_LINUX_MINOR << 8))
635 | (_NETXEN_NIC_LINUX_SUBVERSION);
636 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
637
638 /* Unlock the HW, prompting the boot sequence */
639 writel(1,
640 NETXEN_CRB_NORMALIZE(adapter,
641 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
642 /* Handshake with the card before we register the devices. */
643 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
644 }
645
646 /*
647 * See if the firmware gave us a virtual-physical port mapping.
648 */
649 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
650 if (i != 0x55555555)
651 physical_port[adapter->portnum] = i;
652
653 netif_carrier_off(netdev);
654 netif_stop_queue(netdev);
655
656 if ((err = register_netdev(netdev))) {
657 printk(KERN_ERR "%s: register_netdev failed port #%d"
658 " aborting\n", netxen_nic_driver_name,
659 adapter->portnum);
660 err = -EIO;
661 goto err_out_free_dev;
662 }
663
664 pci_set_drvdata(pdev, adapter);
665
666 switch (adapter->ahw.board_type) {
667 case NETXEN_NIC_GBE:
668 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
669 netxen_nic_driver_name);
670 break;
671
672 case NETXEN_NIC_XGBE:
673 printk(KERN_INFO "%s: XGbE board initialized\n",
674 netxen_nic_driver_name);
675 break;
676 }
677
678 adapter->driver_mismatch = 0;
679
680 return 0;
681
682 err_out_free_dev:
683 if (adapter->portnum == 0)
684 netxen_free_adapter_offload(adapter);
685
686 err_out_free_rx_buffer:
687 for (i = 0; i < MAX_RCV_CTX; ++i) {
688 recv_ctx = &adapter->recv_ctx[i];
689 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
690 rcv_desc = &recv_ctx->rcv_desc[ring];
691 if (rcv_desc->rx_buf_arr != NULL) {
692 vfree(rcv_desc->rx_buf_arr);
693 rcv_desc->rx_buf_arr = NULL;
694 }
695 }
696 }
697 vfree(cmd_buf_arr);
698
699 err_out_free_adapter:
700 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
701 pci_disable_msi(pdev);
702
703 pci_set_drvdata(pdev, NULL);
704
705 if (db_ptr)
706 iounmap(db_ptr);
707
708 err_out_iounmap:
709 if (mem_ptr0)
710 iounmap(mem_ptr0);
711 if (mem_ptr1)
712 iounmap(mem_ptr1);
713 if (mem_ptr2)
714 iounmap(mem_ptr2);
715
716 err_out_free_netdev:
717 free_netdev(netdev);
718
719 err_out_free_res:
720 pci_release_regions(pdev);
721
722 err_out_disable_pdev:
723 pci_disable_device(pdev);
724 return err;
725 }
726
727 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
728 {
729 struct netxen_adapter *adapter;
730 struct net_device *netdev;
731 struct netxen_rx_buffer *buffer;
732 struct netxen_recv_context *recv_ctx;
733 struct netxen_rcv_desc_ctx *rcv_desc;
734 int i, ctxid, ring;
735 static int init_firmware_done = 0;
736
737 adapter = pci_get_drvdata(pdev);
738 if (adapter == NULL)
739 return;
740
741 netdev = adapter->netdev;
742
743 unregister_netdev(netdev);
744
745 if (adapter->stop_port)
746 adapter->stop_port(adapter);
747
748 netxen_nic_disable_int(adapter);
749
750 if (adapter->irq)
751 free_irq(adapter->irq, adapter);
752
753 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
754 init_firmware_done++;
755 netxen_free_hw_resources(adapter);
756 }
757
758 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
759 recv_ctx = &adapter->recv_ctx[ctxid];
760 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
761 rcv_desc = &recv_ctx->rcv_desc[ring];
762 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
763 buffer = &(rcv_desc->rx_buf_arr[i]);
764 if (buffer->state == NETXEN_BUFFER_FREE)
765 continue;
766 pci_unmap_single(pdev, buffer->dma,
767 rcv_desc->dma_size,
768 PCI_DMA_FROMDEVICE);
769 if (buffer->skb != NULL)
770 dev_kfree_skb_any(buffer->skb);
771 }
772 vfree(rcv_desc->rx_buf_arr);
773 }
774 }
775
776 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
777 pci_disable_msi(pdev);
778
779 vfree(adapter->cmd_buf_arr);
780
781 pci_disable_device(pdev);
782
783 if (adapter->portnum == 0) {
784 if (init_firmware_done) {
785 dma_watchdog_shutdown_request(adapter);
786 msleep(100);
787 i = 100;
788 while ((dma_watchdog_shutdown_poll_result(adapter) != 1) && i) {
789 printk(KERN_INFO "dma_watchdog_shutdown_poll still in progress\n");
790 msleep(100);
791 i--;
792 }
793
794 if (i == 0) {
795 printk(KERN_ERR "dma_watchdog_shutdown_request failed\n");
796 return;
797 }
798
799 /* clear the register for future unloads/loads */
800 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
801 printk(KERN_INFO "State: 0x%0x\n",
802 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
803
804 /* leave the hw in the same state as reboot */
805 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
806 if (netxen_pinit_from_rom(adapter, 0))
807 return;
808 msleep(1);
809 if (netxen_load_firmware(adapter))
810 return;
811 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
812 }
813
814 /* clear the register for future unloads/loads */
815 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
816 printk(KERN_INFO "State: 0x%0x\n",
817 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
818
819 dma_watchdog_shutdown_request(adapter);
820 msleep(100);
821 i = 100;
822 while ((dma_watchdog_shutdown_poll_result(adapter) != 1) && i) {
823 printk(KERN_INFO "dma_watchdog_shutdown_poll still in progress\n");
824 msleep(100);
825 i--;
826 }
827
828 if (i) {
829 netxen_free_adapter_offload(adapter);
830 } else {
831 printk(KERN_ERR "failed to dma shutdown\n");
832 return;
833 }
834
835 }
836
837 iounmap(adapter->ahw.db_base);
838 iounmap(adapter->ahw.pci_base0);
839 iounmap(adapter->ahw.pci_base1);
840 iounmap(adapter->ahw.pci_base2);
841
842 pci_release_regions(pdev);
843 pci_set_drvdata(pdev, NULL);
844
845 free_netdev(netdev);
846 }
847
848 /*
849 * Called when a network interface is made active
850 * @returns 0 on success, negative value on failure
851 */
852 static int netxen_nic_open(struct net_device *netdev)
853 {
854 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
855 int err = 0;
856 int ctx, ring;
857
858 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
859 err = netxen_init_firmware(adapter);
860 if (err != 0) {
861 printk(KERN_ERR "Failed to init firmware\n");
862 return -EIO;
863 }
864 netxen_nic_flash_print(adapter);
865
866 /* setup all the resources for the Phantom... */
867 /* this include the descriptors for rcv, tx, and status */
868 netxen_nic_clear_stats(adapter);
869 err = netxen_nic_hw_resources(adapter);
870 if (err) {
871 printk(KERN_ERR "Error in setting hw resources:%d\n",
872 err);
873 return err;
874 }
875 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
876 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
877 netxen_post_rx_buffers(adapter, ctx, ring);
878 }
879 adapter->irq = adapter->ahw.pdev->irq;
880 err = request_irq(adapter->ahw.pdev->irq, netxen_intr,
881 IRQF_SHARED|IRQF_SAMPLE_RANDOM, netdev->name,
882 adapter);
883 if (err) {
884 printk(KERN_ERR "request_irq failed with: %d\n", err);
885 netxen_free_hw_resources(adapter);
886 return err;
887 }
888
889 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
890 }
891 if (!adapter->driver_mismatch)
892 mod_timer(&adapter->watchdog_timer, jiffies);
893
894 netxen_nic_enable_int(adapter);
895
896 /* Done here again so that even if phantom sw overwrote it,
897 * we set it */
898 if (adapter->macaddr_set)
899 adapter->macaddr_set(adapter, netdev->dev_addr);
900 if (adapter->init_port
901 && adapter->init_port(adapter, adapter->portnum) != 0) {
902 del_timer_sync(&adapter->watchdog_timer);
903 printk(KERN_ERR "%s: Failed to initialize port %d\n",
904 netxen_nic_driver_name, adapter->portnum);
905 return -EIO;
906 }
907
908 netxen_nic_set_link_parameters(adapter);
909
910 netxen_nic_set_multi(netdev);
911 if (adapter->set_mtu)
912 adapter->set_mtu(adapter, netdev->mtu);
913
914 if (!adapter->driver_mismatch)
915 netif_start_queue(netdev);
916
917 return 0;
918 }
919
920 /*
921 * netxen_nic_close - Disables a network interface entry point
922 */
923 static int netxen_nic_close(struct net_device *netdev)
924 {
925 struct netxen_adapter *adapter = netdev_priv(netdev);
926 int i, j;
927 struct netxen_cmd_buffer *cmd_buff;
928 struct netxen_skb_frag *buffrag;
929
930 netif_carrier_off(netdev);
931 netif_stop_queue(netdev);
932
933 cmd_buff = adapter->cmd_buf_arr;
934 for (i = 0; i < adapter->max_tx_desc_count; i++) {
935 buffrag = cmd_buff->frag_array;
936 if (buffrag->dma) {
937 pci_unmap_single(adapter->pdev, buffrag->dma,
938 buffrag->length, PCI_DMA_TODEVICE);
939 buffrag->dma = 0ULL;
940 }
941 for (j = 0; j < cmd_buff->frag_count; j++) {
942 buffrag++;
943 if (buffrag->dma) {
944 pci_unmap_page(adapter->pdev, buffrag->dma,
945 buffrag->length,
946 PCI_DMA_TODEVICE);
947 buffrag->dma = 0ULL;
948 }
949 }
950 /* Free the skb we received in netxen_nic_xmit_frame */
951 if (cmd_buff->skb) {
952 dev_kfree_skb_any(cmd_buff->skb);
953 cmd_buff->skb = NULL;
954 }
955 cmd_buff++;
956 }
957 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
958 FLUSH_SCHEDULED_WORK();
959 del_timer_sync(&adapter->watchdog_timer);
960 }
961
962 return 0;
963 }
964
965 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
966 {
967 struct netxen_adapter *adapter = netdev_priv(netdev);
968 struct netxen_hardware_context *hw = &adapter->ahw;
969 unsigned int first_seg_len = skb->len - skb->data_len;
970 struct netxen_skb_frag *buffrag;
971 unsigned int i;
972
973 u32 producer = 0;
974 u32 saved_producer = 0;
975 struct cmd_desc_type0 *hwdesc;
976 int k;
977 struct netxen_cmd_buffer *pbuf = NULL;
978 static int dropped_packet = 0;
979 int frag_count;
980 u32 local_producer = 0;
981 u32 max_tx_desc_count = 0;
982 u32 last_cmd_consumer = 0;
983 int no_of_desc;
984
985 adapter->stats.xmitcalled++;
986 frag_count = skb_shinfo(skb)->nr_frags + 1;
987
988 if (unlikely(skb->len <= 0)) {
989 dev_kfree_skb_any(skb);
990 adapter->stats.badskblen++;
991 return NETDEV_TX_OK;
992 }
993
994 if (frag_count > MAX_BUFFERS_PER_CMD) {
995 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
996 "too large, can handle only %d frags\n",
997 netxen_nic_driver_name, netdev->name,
998 frag_count, MAX_BUFFERS_PER_CMD);
999 adapter->stats.txdropped++;
1000 if ((++dropped_packet & 0xff) == 0xff)
1001 printk("%s: %s droppped packets = %d\n",
1002 netxen_nic_driver_name, netdev->name,
1003 dropped_packet);
1004
1005 return NETDEV_TX_OK;
1006 }
1007
1008 /*
1009 * Everything is set up. Now, we just need to transmit it out.
1010 * Note that we have to copy the contents of buffer over to
1011 * right place. Later on, this can be optimized out by de-coupling the
1012 * producer index from the buffer index.
1013 */
1014 retry_getting_window:
1015 spin_lock_bh(&adapter->tx_lock);
1016 if (adapter->total_threads >= MAX_XMIT_PRODUCERS) {
1017 spin_unlock_bh(&adapter->tx_lock);
1018 /*
1019 * Yield CPU
1020 */
1021 if (!in_atomic())
1022 schedule();
1023 else {
1024 for (i = 0; i < 20; i++)
1025 cpu_relax(); /*This a nop instr on i386 */
1026 }
1027 goto retry_getting_window;
1028 }
1029 local_producer = adapter->cmd_producer;
1030 /* There 4 fragments per descriptor */
1031 no_of_desc = (frag_count + 3) >> 2;
1032 if (netdev->features & NETIF_F_TSO) {
1033 if (skb_shinfo(skb)->gso_size > 0) {
1034
1035 no_of_desc++;
1036 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
1037 sizeof(struct ethhdr)) >
1038 (sizeof(struct cmd_desc_type0) - 2)) {
1039 no_of_desc++;
1040 }
1041 }
1042 }
1043 k = adapter->cmd_producer;
1044 max_tx_desc_count = adapter->max_tx_desc_count;
1045 last_cmd_consumer = adapter->last_cmd_consumer;
1046 if ((k + no_of_desc) >=
1047 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
1048 last_cmd_consumer)) {
1049 netif_stop_queue(netdev);
1050 adapter->flags |= NETXEN_NETDEV_STATUS;
1051 spin_unlock_bh(&adapter->tx_lock);
1052 return NETDEV_TX_BUSY;
1053 }
1054 k = get_index_range(k, max_tx_desc_count, no_of_desc);
1055 adapter->cmd_producer = k;
1056 adapter->total_threads++;
1057 adapter->num_threads++;
1058
1059 spin_unlock_bh(&adapter->tx_lock);
1060 /* Copy the descriptors into the hardware */
1061 producer = local_producer;
1062 saved_producer = producer;
1063 hwdesc = &hw->cmd_desc_head[producer];
1064 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1065 /* Take skb->data itself */
1066 pbuf = &adapter->cmd_buf_arr[producer];
1067 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
1068 pbuf->mss = skb_shinfo(skb)->gso_size;
1069 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
1070 } else {
1071 pbuf->mss = 0;
1072 hwdesc->mss = 0;
1073 }
1074 pbuf->total_length = skb->len;
1075 pbuf->skb = skb;
1076 pbuf->cmd = TX_ETHER_PKT;
1077 pbuf->frag_count = frag_count;
1078 pbuf->port = adapter->portnum;
1079 buffrag = &pbuf->frag_array[0];
1080 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
1081 PCI_DMA_TODEVICE);
1082 buffrag->length = first_seg_len;
1083 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
1084 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
1085 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
1086
1087 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
1088 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
1089 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1090 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1091
1092 for (i = 1, k = 1; i < frag_count; i++, k++) {
1093 struct skb_frag_struct *frag;
1094 int len, temp_len;
1095 unsigned long offset;
1096 dma_addr_t temp_dma;
1097
1098 /* move to next desc. if there is a need */
1099 if ((i & 0x3) == 0) {
1100 k = 0;
1101 producer = get_next_index(producer,
1102 adapter->max_tx_desc_count);
1103 hwdesc = &hw->cmd_desc_head[producer];
1104 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1105 }
1106 frag = &skb_shinfo(skb)->frags[i - 1];
1107 len = frag->size;
1108 offset = frag->page_offset;
1109
1110 temp_len = len;
1111 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
1112 len, PCI_DMA_TODEVICE);
1113
1114 buffrag++;
1115 buffrag->dma = temp_dma;
1116 buffrag->length = temp_len;
1117
1118 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
1119 switch (k) {
1120 case 0:
1121 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1122 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1123 break;
1124 case 1:
1125 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1126 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1127 break;
1128 case 2:
1129 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1130 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1131 break;
1132 case 3:
1133 hwdesc->buffer4_length = cpu_to_le16(temp_len);
1134 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1135 break;
1136 }
1137 frag++;
1138 }
1139 producer = get_next_index(producer, adapter->max_tx_desc_count);
1140
1141 /* might change opcode to TX_TCP_LSO */
1142 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1143
1144 /* For LSO, we need to copy the MAC/IP/TCP headers into
1145 * the descriptor ring
1146 */
1147 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1148 == TX_TCP_LSO) {
1149 int hdr_len, first_hdr_len, more_hdr;
1150 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1151 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1152 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1153 more_hdr = 1;
1154 } else {
1155 first_hdr_len = hdr_len;
1156 more_hdr = 0;
1157 }
1158 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1159 hwdesc = &hw->cmd_desc_head[producer];
1160
1161 /* copy the first 64 bytes */
1162 memcpy(((void *)hwdesc) + 2,
1163 (void *)(skb->data), first_hdr_len);
1164 producer = get_next_index(producer, max_tx_desc_count);
1165
1166 if (more_hdr) {
1167 hwdesc = &hw->cmd_desc_head[producer];
1168 /* copy the next 64 bytes - should be enough except
1169 * for pathological case
1170 */
1171 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1172 hwdesc,
1173 (hdr_len -
1174 first_hdr_len));
1175 producer = get_next_index(producer, max_tx_desc_count);
1176 }
1177 }
1178
1179 i = netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
1180
1181 hw->cmd_desc_head[saved_producer].flags_opcode =
1182 cpu_to_le16(hw->cmd_desc_head[saved_producer].flags_opcode);
1183 hw->cmd_desc_head[saved_producer].num_of_buffers_total_length =
1184 cpu_to_le32(hw->cmd_desc_head[saved_producer].
1185 num_of_buffers_total_length);
1186
1187 spin_lock_bh(&adapter->tx_lock);
1188 adapter->stats.txbytes += i;
1189
1190 /* Code to update the adapter considering how many producer threads
1191 are currently working */
1192 if ((--adapter->num_threads) == 0) {
1193 /* This is the last thread */
1194 u32 crb_producer = adapter->cmd_producer;
1195 netxen_nic_update_cmd_producer(adapter, crb_producer);
1196 wmb();
1197 adapter->total_threads = 0;
1198 }
1199
1200 adapter->stats.xmitfinished++;
1201 spin_unlock_bh(&adapter->tx_lock);
1202
1203 netdev->trans_start = jiffies;
1204
1205 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
1206
1207 DPRINTK(INFO, "Done. Send\n");
1208 return NETDEV_TX_OK;
1209 }
1210
1211 static void netxen_watchdog(unsigned long v)
1212 {
1213 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1214
1215 SCHEDULE_WORK(&adapter->watchdog_task);
1216 }
1217
1218 static void netxen_tx_timeout(struct net_device *netdev)
1219 {
1220 struct netxen_adapter *adapter = (struct netxen_adapter *)
1221 netdev_priv(netdev);
1222 SCHEDULE_WORK(&adapter->tx_timeout_task);
1223 }
1224
1225 static void netxen_tx_timeout_task(struct work_struct *work)
1226 {
1227 struct netxen_adapter *adapter =
1228 container_of(work, struct netxen_adapter, tx_timeout_task);
1229 unsigned long flags;
1230
1231 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1232 netxen_nic_driver_name, adapter->netdev->name);
1233
1234 spin_lock_irqsave(&adapter->lock, flags);
1235 netxen_nic_close(adapter->netdev);
1236 netxen_nic_open(adapter->netdev);
1237 spin_unlock_irqrestore(&adapter->lock, flags);
1238 adapter->netdev->trans_start = jiffies;
1239 netif_wake_queue(adapter->netdev);
1240 }
1241
1242 static int
1243 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
1244 {
1245 u32 ret = 0;
1246 u32 our_int = 0;
1247
1248 DPRINTK(INFO, "Entered handle ISR\n");
1249 adapter->stats.ints++;
1250
1251 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1252 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1253 /* not our interrupt */
1254 if ((our_int & (0x80 << adapter->portnum)) == 0)
1255 return ret;
1256 }
1257
1258 netxen_nic_disable_int(adapter);
1259
1260 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1261 /* claim interrupt */
1262 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1263 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
1264 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1265 }
1266 }
1267
1268 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
1269 if (netif_rx_schedule_prep(netdev)) {
1270 /*
1271 * Interrupts are already disabled.
1272 */
1273 __netif_rx_schedule(netdev);
1274 } else {
1275 static unsigned int intcount = 0;
1276 if ((++intcount & 0xfff) == 0xfff)
1277 DPRINTK(KERN_ERR
1278 "%s: %s interrupt %d while in poll\n",
1279 netxen_nic_driver_name, netdev->name,
1280 intcount);
1281 }
1282 ret = 1;
1283 }
1284
1285 if (ret == 0) {
1286 netxen_nic_enable_int(adapter);
1287 }
1288
1289 return ret;
1290 }
1291
1292 /*
1293 * netxen_intr - Interrupt Handler
1294 * @irq: interrupt number
1295 * data points to adapter stucture (which may be handling more than 1 port
1296 */
1297 irqreturn_t netxen_intr(int irq, void *data)
1298 {
1299 struct netxen_adapter *adapter;
1300 struct net_device *netdev;
1301
1302 if (unlikely(!irq)) {
1303 return IRQ_NONE; /* Not our interrupt */
1304 }
1305
1306 adapter = (struct netxen_adapter *)data;
1307 netdev = adapter->netdev;
1308 /* process our status queue (for all 4 ports) */
1309 if (netif_running(netdev))
1310 netxen_handle_int(adapter, netdev);
1311
1312 return IRQ_HANDLED;
1313 }
1314
1315 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1316 {
1317 struct netxen_adapter *adapter = netdev_priv(netdev);
1318 int work_to_do = min(*budget, netdev->quota);
1319 int done = 1;
1320 int ctx;
1321 int this_work_done;
1322 int work_done = 0;
1323
1324 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1325
1326 work_done = 0;
1327 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1328 /*
1329 * Fairness issue. This will give undue weight to the
1330 * receive context 0.
1331 */
1332
1333 /*
1334 * To avoid starvation, we give each of our receivers,
1335 * a fraction of the quota. Sometimes, it might happen that we
1336 * have enough quota to process every packet, but since all the
1337 * packets are on one context, it gets only half of the quota,
1338 * and ends up not processing it.
1339 */
1340 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1341 work_to_do /
1342 MAX_RCV_CTX);
1343 work_done += this_work_done;
1344 }
1345
1346 netdev->quota -= work_done;
1347 *budget -= work_done;
1348
1349 if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
1350 done = 0;
1351
1352 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1353 done = 0;
1354
1355 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1356 work_done, work_to_do);
1357 if (done) {
1358 netif_rx_complete(netdev);
1359 netxen_nic_enable_int(adapter);
1360 }
1361
1362 return !done;
1363 }
1364
1365 #ifdef CONFIG_NET_POLL_CONTROLLER
1366 static void netxen_nic_poll_controller(struct net_device *netdev)
1367 {
1368 struct netxen_adapter *adapter = netdev_priv(netdev);
1369 disable_irq(adapter->irq);
1370 netxen_intr(adapter->irq, adapter);
1371 enable_irq(adapter->irq);
1372 }
1373 #endif
1374
1375 static struct pci_driver netxen_driver = {
1376 .name = netxen_nic_driver_name,
1377 .id_table = netxen_pci_tbl,
1378 .probe = netxen_nic_probe,
1379 .remove = __devexit_p(netxen_nic_remove)
1380 };
1381
1382 /* Driver Registration on NetXen card */
1383
1384 static int __init netxen_init_module(void)
1385 {
1386 if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
1387 return -ENOMEM;
1388
1389 return pci_register_driver(&netxen_driver);
1390 }
1391
1392 module_init(netxen_init_module);
1393
1394 static void __exit netxen_exit_module(void)
1395 {
1396 /*
1397 * Wait for some time to allow the dma to drain, if any.
1398 */
1399 msleep(100);
1400 pci_unregister_driver(&netxen_driver);
1401 destroy_workqueue(netxen_workq);
1402 }
1403
1404 module_exit(netxen_exit_module);
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