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RESEND [PATCH 1/3] NetXen: Fix issue of MSI not working correctly
[mirror_ubuntu-zesty-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 u8 nx_p2_id = NX_P2_C0;
58
59 #define DMA_32BIT_MASK 0x00000000ffffffffULL
60 #define DMA_35BIT_MASK 0x00000007ffffffffULL
61
62 /* Local functions to NetXen NIC driver */
63 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
64 const struct pci_device_id *ent);
65 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
66 static int netxen_nic_open(struct net_device *netdev);
67 static int netxen_nic_close(struct net_device *netdev);
68 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
69 static void netxen_tx_timeout(struct net_device *netdev);
70 static void netxen_tx_timeout_task(struct work_struct *work);
71 static void netxen_watchdog(unsigned long);
72 static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
73 static int netxen_nic_poll(struct net_device *dev, int *budget);
74 #ifdef CONFIG_NET_POLL_CONTROLLER
75 static void netxen_nic_poll_controller(struct net_device *netdev);
76 #endif
77 static irqreturn_t netxen_intr(int irq, void *data);
78
79 int physical_port[] = {0, 1, 2, 3};
80
81 /* PCI Device ID Table */
82 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
83 {PCI_DEVICE(0x4040, 0x0001)},
84 {PCI_DEVICE(0x4040, 0x0002)},
85 {PCI_DEVICE(0x4040, 0x0003)},
86 {PCI_DEVICE(0x4040, 0x0004)},
87 {PCI_DEVICE(0x4040, 0x0005)},
88 {PCI_DEVICE(0x4040, 0x0024)},
89 {PCI_DEVICE(0x4040, 0x0025)},
90 {0,}
91 };
92
93 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
94
95 struct workqueue_struct *netxen_workq;
96 static void netxen_watchdog(unsigned long);
97
98 static inline void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
99 uint32_t crb_producer)
100 {
101 switch (adapter->portnum) {
102 case 0:
103 writel(crb_producer, NETXEN_CRB_NORMALIZE
104 (adapter, CRB_CMD_PRODUCER_OFFSET));
105 return;
106 case 1:
107 writel(crb_producer, NETXEN_CRB_NORMALIZE
108 (adapter, CRB_CMD_PRODUCER_OFFSET_1));
109 return;
110 case 2:
111 writel(crb_producer, NETXEN_CRB_NORMALIZE
112 (adapter, CRB_CMD_PRODUCER_OFFSET_2));
113 return;
114 case 3:
115 writel(crb_producer, NETXEN_CRB_NORMALIZE
116 (adapter, CRB_CMD_PRODUCER_OFFSET_3));
117 return;
118 default:
119 printk(KERN_WARNING "We tried to update "
120 "CRB_CMD_PRODUCER_OFFSET for invalid "
121 "PCI function id %d\n",
122 adapter->portnum);
123 return;
124 }
125 }
126
127 static inline void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
128 u32 crb_consumer)
129 {
130 switch (adapter->portnum) {
131 case 0:
132 writel(crb_consumer, NETXEN_CRB_NORMALIZE
133 (adapter, CRB_CMD_CONSUMER_OFFSET));
134 return;
135 case 1:
136 writel(crb_consumer, NETXEN_CRB_NORMALIZE
137 (adapter, CRB_CMD_CONSUMER_OFFSET_1));
138 return;
139 case 2:
140 writel(crb_consumer, NETXEN_CRB_NORMALIZE
141 (adapter, CRB_CMD_CONSUMER_OFFSET_2));
142 return;
143 case 3:
144 writel(crb_consumer, NETXEN_CRB_NORMALIZE
145 (adapter, CRB_CMD_CONSUMER_OFFSET_3));
146 return;
147 default:
148 printk(KERN_WARNING "We tried to update "
149 "CRB_CMD_PRODUCER_OFFSET for invalid "
150 "PCI function id %d\n",
151 adapter->portnum);
152 return;
153 }
154 }
155
156 #define ADAPTER_LIST_SIZE 12
157 int netxen_cards_found;
158
159 /*
160 * netxen_nic_probe()
161 *
162 * The Linux system will invoke this after identifying the vendor ID and
163 * device Id in the pci_tbl supported by this module.
164 *
165 * A quad port card has one operational PCI config space, (function 0),
166 * which is used to access all four ports.
167 *
168 * This routine will initialize the adapter, and setup the global parameters
169 * along with the port's specific structure.
170 */
171 static int __devinit
172 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
173 {
174 struct net_device *netdev = NULL;
175 struct netxen_adapter *adapter = NULL;
176 void __iomem *mem_ptr0 = NULL;
177 void __iomem *mem_ptr1 = NULL;
178 void __iomem *mem_ptr2 = NULL;
179 unsigned long first_page_group_end;
180 unsigned long first_page_group_start;
181
182
183 u8 __iomem *db_ptr = NULL;
184 unsigned long mem_base, mem_len, db_base, db_len;
185 int pci_using_dac, i = 0, err;
186 int ring;
187 struct netxen_recv_context *recv_ctx = NULL;
188 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
189 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
190 u64 mac_addr[FLASH_NUM_PORTS + 1];
191 int valid_mac = 0;
192 u32 val;
193 int pci_func_id = PCI_FUNC(pdev->devfn);
194
195 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
196
197 if (pdev->class != 0x020000) {
198 printk(KERN_ERR"NetXen function %d, class %x will not"
199 "be enabled.\n",pci_func_id, pdev->class);
200 return -ENODEV;
201 }
202 if ((err = pci_enable_device(pdev)))
203 return err;
204 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
205 err = -ENODEV;
206 goto err_out_disable_pdev;
207 }
208
209 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
210 goto err_out_disable_pdev;
211
212 pci_set_master(pdev);
213 pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id);
214 if (nx_p2_id == NX_P2_C1 &&
215 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
216 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
217 pci_using_dac = 1;
218 } else {
219 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
220 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
221 goto err_out_free_res;
222
223 pci_using_dac = 0;
224 }
225
226
227 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
228 if(!netdev) {
229 printk(KERN_ERR"%s: Failed to allocate memory for the "
230 "device block.Check system memory resource"
231 " usage.\n", netxen_nic_driver_name);
232 goto err_out_free_res;
233 }
234
235 SET_MODULE_OWNER(netdev);
236 SET_NETDEV_DEV(netdev, &pdev->dev);
237
238 adapter = netdev->priv;
239 memset(adapter, 0 , sizeof(struct netxen_adapter));
240
241 adapter->ahw.pdev = pdev;
242 adapter->ahw.pci_func = pci_func_id;
243 spin_lock_init(&adapter->tx_lock);
244 spin_lock_init(&adapter->lock);
245
246 /* remap phys address */
247 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
248 mem_len = pci_resource_len(pdev, 0);
249
250 /* 128 Meg of memory */
251 if (mem_len == NETXEN_PCI_128MB_SIZE) {
252 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
253 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
254 SECOND_PAGE_GROUP_SIZE);
255 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
256 THIRD_PAGE_GROUP_SIZE);
257 first_page_group_start = FIRST_PAGE_GROUP_START;
258 first_page_group_end = FIRST_PAGE_GROUP_END;
259 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
260 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
261 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
262 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
263 first_page_group_start = 0;
264 first_page_group_end = 0;
265 } else {
266 err = -EIO;
267 goto err_out_free_netdev;
268 }
269
270 if (((mem_ptr0 == 0UL) && (mem_len == NETXEN_PCI_128MB_SIZE)) ||
271 (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
272 DPRINTK(ERR,
273 "Cannot remap adapter memory aborting.:"
274 "0 -> %p, 1 -> %p, 2 -> %p\n",
275 mem_ptr0, mem_ptr1, mem_ptr2);
276
277 err = -EIO;
278 goto err_out_iounmap;
279 }
280 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
281 db_len = pci_resource_len(pdev, 4);
282
283 if (db_len == 0) {
284 printk(KERN_ERR "%s: doorbell is disabled\n",
285 netxen_nic_driver_name);
286 err = -EIO;
287 goto err_out_iounmap;
288 }
289 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
290 db_len);
291
292 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
293 if (!db_ptr) {
294 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
295 netxen_nic_driver_name);
296 err = -EIO;
297 goto err_out_iounmap;
298 }
299 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
300
301 adapter->ahw.pci_base0 = mem_ptr0;
302 adapter->ahw.first_page_group_start = first_page_group_start;
303 adapter->ahw.first_page_group_end = first_page_group_end;
304 adapter->ahw.pci_base1 = mem_ptr1;
305 adapter->ahw.pci_base2 = mem_ptr2;
306 adapter->ahw.db_base = db_ptr;
307 adapter->ahw.db_len = db_len;
308
309 adapter->netdev = netdev;
310 adapter->pdev = pdev;
311 adapter->portnum = pci_func_id;
312
313 netdev->open = netxen_nic_open;
314 netdev->stop = netxen_nic_close;
315 netdev->hard_start_xmit = netxen_nic_xmit_frame;
316 netdev->get_stats = netxen_nic_get_stats;
317 netdev->set_multicast_list = netxen_nic_set_multi;
318 netdev->set_mac_address = netxen_nic_set_mac;
319 netdev->change_mtu = netxen_nic_change_mtu;
320 netdev->tx_timeout = netxen_tx_timeout;
321 netdev->watchdog_timeo = HZ;
322
323 netxen_nic_change_mtu(netdev, netdev->mtu);
324
325 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
326 netdev->poll = netxen_nic_poll;
327 netdev->weight = NETXEN_NETDEV_WEIGHT;
328 #ifdef CONFIG_NET_POLL_CONTROLLER
329 netdev->poll_controller = netxen_nic_poll_controller;
330 #endif
331 /* ScatterGather support */
332 netdev->features = NETIF_F_SG;
333 netdev->features |= NETIF_F_IP_CSUM;
334 netdev->features |= NETIF_F_TSO;
335
336 if (pci_using_dac)
337 netdev->features |= NETIF_F_HIGHDMA;
338
339 if (pci_enable_msi(pdev))
340 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
341 else
342 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
343
344 netdev->irq = pdev->irq;
345 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
346
347 /*
348 * Set the CRB window to invalid. If any register in window 0 is
349 * accessed it should set the window to 0 and then reset it to 1.
350 */
351 adapter->curr_window = 255;
352
353 /* initialize the adapter */
354 netxen_initialize_adapter_hw(adapter);
355
356 /*
357 * Adapter in our case is quad port so initialize it before
358 * initializing the ports
359 */
360
361 netxen_initialize_adapter_ops(adapter);
362
363 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
364 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
365 (adapter->ahw.boardcfg.board_type ==
366 NETXEN_BRDTYPE_P2_SB31_2G))
367 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
368 else
369 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
370 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
371 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
372
373 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
374 if (cmd_buf_arr == NULL) {
375 printk(KERN_ERR
376 "%s: Could not allocate cmd_buf_arr memory:%d\n",
377 netxen_nic_driver_name, (int)TX_RINGSIZE);
378 err = -ENOMEM;
379 goto err_out_free_adapter;
380 }
381 memset(cmd_buf_arr, 0, TX_RINGSIZE);
382 adapter->cmd_buf_arr = cmd_buf_arr;
383
384 for (i = 0; i < MAX_RCV_CTX; ++i) {
385 recv_ctx = &adapter->recv_ctx[i];
386 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
387 rcv_desc = &recv_ctx->rcv_desc[ring];
388 switch (RCV_DESC_TYPE(ring)) {
389 case RCV_DESC_NORMAL:
390 rcv_desc->max_rx_desc_count =
391 adapter->max_rx_desc_count;
392 rcv_desc->flags = RCV_DESC_NORMAL;
393 rcv_desc->dma_size = RX_DMA_MAP_LEN;
394 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
395 break;
396
397 case RCV_DESC_JUMBO:
398 rcv_desc->max_rx_desc_count =
399 adapter->max_jumbo_rx_desc_count;
400 rcv_desc->flags = RCV_DESC_JUMBO;
401 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
402 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
403 break;
404
405 case RCV_RING_LRO:
406 rcv_desc->max_rx_desc_count =
407 adapter->max_lro_rx_desc_count;
408 rcv_desc->flags = RCV_DESC_LRO;
409 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
410 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
411 break;
412
413 }
414 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
415 vmalloc(RCV_BUFFSIZE);
416
417 if (rcv_desc->rx_buf_arr == NULL) {
418 printk(KERN_ERR "%s: Could not allocate"
419 "rcv_desc->rx_buf_arr memory:%d\n",
420 netxen_nic_driver_name,
421 (int)RCV_BUFFSIZE);
422 err = -ENOMEM;
423 goto err_out_free_rx_buffer;
424 }
425 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
426 }
427
428 }
429
430 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
431
432 /* Mezz cards have PCI function 0,2,3 enabled */
433 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB31_10G_IMEZ)
434 && (pci_func_id >= 2))
435 adapter->portnum = pci_func_id - 2;
436
437 #ifdef CONFIG_IA64
438 if(adapter->portnum == 0) {
439 netxen_pinit_from_rom(adapter, 0);
440 udelay(500);
441 netxen_load_firmware(adapter);
442 }
443 #endif
444
445 init_timer(&adapter->watchdog_timer);
446 adapter->ahw.xg_linkup = 0;
447 adapter->watchdog_timer.function = &netxen_watchdog;
448 adapter->watchdog_timer.data = (unsigned long)adapter;
449 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
450 adapter->ahw.pdev = pdev;
451 adapter->proc_cmd_buf_counter = 0;
452 adapter->ahw.revision_id = nx_p2_id;
453
454 /* make sure Window == 1 */
455 netxen_nic_pci_change_crbwindow(adapter, 1);
456
457 netxen_nic_update_cmd_producer(adapter, 0);
458 netxen_nic_update_cmd_consumer(adapter, 0);
459 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
460
461 if (netxen_is_flash_supported(adapter) == 0 &&
462 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
463 valid_mac = 1;
464 else
465 valid_mac = 0;
466
467 if (valid_mac) {
468 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
469 netdev->dev_addr[0] = *(p + 5);
470 netdev->dev_addr[1] = *(p + 4);
471 netdev->dev_addr[2] = *(p + 3);
472 netdev->dev_addr[3] = *(p + 2);
473 netdev->dev_addr[4] = *(p + 1);
474 netdev->dev_addr[5] = *(p + 0);
475
476 memcpy(netdev->perm_addr, netdev->dev_addr,
477 netdev->addr_len);
478 if (!is_valid_ether_addr(netdev->perm_addr)) {
479 printk(KERN_ERR "%s: Bad MAC address "
480 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
481 netxen_nic_driver_name,
482 netdev->dev_addr[0],
483 netdev->dev_addr[1],
484 netdev->dev_addr[2],
485 netdev->dev_addr[3],
486 netdev->dev_addr[4],
487 netdev->dev_addr[5]);
488 } else {
489 if (adapter->macaddr_set)
490 adapter->macaddr_set(adapter,
491 netdev->dev_addr);
492 }
493 }
494
495 if (adapter->portnum == 0) {
496 err = netxen_initialize_adapter_offload(adapter);
497 if (err)
498 goto err_out_free_rx_buffer;
499 val = readl(NETXEN_CRB_NORMALIZE(adapter,
500 NETXEN_CAM_RAM(0x1fc)));
501 if (val == 0x55555555) {
502 /* This is the first boot after power up */
503 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
504 if (!(val & 0x4)) {
505 val |= 0x4;
506 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
507 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
508 }
509 val = readl(NETXEN_CRB_NORMALIZE(adapter,
510 NETXEN_ROMUSB_GLB_SW_RESET));
511 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
512 if (val != 0x80000f) {
513 /* clear the register for future unloads/loads */
514 writel(0, NETXEN_CRB_NORMALIZE(adapter,
515 NETXEN_CAM_RAM(0x1fc)));
516 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
517 err = -ENODEV;
518 goto err_out_free_dev;
519 }
520
521 /* clear the register for future unloads/loads */
522 writel(0, NETXEN_CRB_NORMALIZE(adapter,
523 NETXEN_CAM_RAM(0x1fc)));
524 }
525 printk(KERN_INFO "State: 0x%0x\n",
526 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
527
528 /*
529 * Tell the hardware our version number.
530 */
531 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
532 | ((_NETXEN_NIC_LINUX_MINOR << 8))
533 | (_NETXEN_NIC_LINUX_SUBVERSION);
534 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
535
536 /* Unlock the HW, prompting the boot sequence */
537 writel(1,
538 NETXEN_CRB_NORMALIZE(adapter,
539 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
540 /* Handshake with the card before we register the devices. */
541 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
542
543 /* leave the hw in the same state as reboot */
544 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
545 netxen_pinit_from_rom(adapter, 0);
546 udelay(500);
547 netxen_load_firmware(adapter);
548 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
549 }
550
551 /*
552 * See if the firmware gave us a virtual-physical port mapping.
553 */
554 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
555 if (i != 0x55555555)
556 physical_port[adapter->portnum] = i;
557
558 netif_carrier_off(netdev);
559 netif_stop_queue(netdev);
560
561 if ((err = register_netdev(netdev))) {
562 printk(KERN_ERR "%s: register_netdev failed port #%d"
563 " aborting\n", netxen_nic_driver_name,
564 adapter->portnum);
565 err = -EIO;
566 goto err_out_free_dev;
567 }
568
569 pci_set_drvdata(pdev, adapter);
570
571 switch (adapter->ahw.board_type) {
572 case NETXEN_NIC_GBE:
573 printk(KERN_INFO "%s: QUAD GbE board initialized\n",
574 netxen_nic_driver_name);
575 break;
576
577 case NETXEN_NIC_XGBE:
578 printk(KERN_INFO "%s: XGbE board initialized\n",
579 netxen_nic_driver_name);
580 break;
581 }
582
583 adapter->driver_mismatch = 0;
584
585 return 0;
586
587 err_out_free_dev:
588 if (adapter->portnum == 0)
589 netxen_free_adapter_offload(adapter);
590
591 err_out_free_rx_buffer:
592 for (i = 0; i < MAX_RCV_CTX; ++i) {
593 recv_ctx = &adapter->recv_ctx[i];
594 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
595 rcv_desc = &recv_ctx->rcv_desc[ring];
596 if (rcv_desc->rx_buf_arr != NULL) {
597 vfree(rcv_desc->rx_buf_arr);
598 rcv_desc->rx_buf_arr = NULL;
599 }
600 }
601 }
602 vfree(cmd_buf_arr);
603
604 err_out_free_adapter:
605 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
606 pci_disable_msi(pdev);
607
608 pci_set_drvdata(pdev, NULL);
609
610 if (db_ptr)
611 iounmap(db_ptr);
612
613 err_out_iounmap:
614 if (mem_ptr0)
615 iounmap(mem_ptr0);
616 if (mem_ptr1)
617 iounmap(mem_ptr1);
618 if (mem_ptr2)
619 iounmap(mem_ptr2);
620
621 err_out_free_netdev:
622 free_netdev(netdev);
623
624 err_out_free_res:
625 pci_release_regions(pdev);
626
627 err_out_disable_pdev:
628 pci_disable_device(pdev);
629 return err;
630 }
631
632 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
633 {
634 struct netxen_adapter *adapter;
635 struct net_device *netdev;
636 struct netxen_rx_buffer *buffer;
637 struct netxen_recv_context *recv_ctx;
638 struct netxen_rcv_desc_ctx *rcv_desc;
639 int i;
640 int ctxid, ring;
641
642 adapter = pci_get_drvdata(pdev);
643 if (adapter == NULL)
644 return;
645
646 netdev = adapter->netdev;
647
648 netxen_nic_disable_int(adapter);
649 if (adapter->irq)
650 free_irq(adapter->irq, adapter);
651
652 if (adapter->stop_port)
653 adapter->stop_port(adapter);
654
655 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
656 pci_disable_msi(pdev);
657
658 if (adapter->portnum == 0)
659 netxen_free_adapter_offload(adapter);
660
661 if(adapter->portnum == 0) {
662 /* leave the hw in the same state as reboot */
663 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
664 netxen_pinit_from_rom(adapter, 0);
665 udelay(500);
666 netxen_load_firmware(adapter);
667 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
668 }
669
670 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
671 netxen_free_hw_resources(adapter);
672
673 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
674 recv_ctx = &adapter->recv_ctx[ctxid];
675 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
676 rcv_desc = &recv_ctx->rcv_desc[ring];
677 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
678 buffer = &(rcv_desc->rx_buf_arr[i]);
679 if (buffer->state == NETXEN_BUFFER_FREE)
680 continue;
681 pci_unmap_single(pdev, buffer->dma,
682 rcv_desc->dma_size,
683 PCI_DMA_FROMDEVICE);
684 if (buffer->skb != NULL)
685 dev_kfree_skb_any(buffer->skb);
686 }
687 vfree(rcv_desc->rx_buf_arr);
688 }
689 }
690
691 unregister_netdev(netdev);
692
693 vfree(adapter->cmd_buf_arr);
694
695 iounmap(adapter->ahw.db_base);
696 iounmap(adapter->ahw.pci_base0);
697 iounmap(adapter->ahw.pci_base1);
698 iounmap(adapter->ahw.pci_base2);
699
700 pci_release_regions(pdev);
701 pci_disable_device(pdev);
702 pci_set_drvdata(pdev, NULL);
703
704 free_netdev(netdev);
705 }
706
707 /*
708 * Called when a network interface is made active
709 * @returns 0 on success, negative value on failure
710 */
711 static int netxen_nic_open(struct net_device *netdev)
712 {
713 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
714 int err = 0;
715 int ctx, ring;
716
717 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
718 err = netxen_init_firmware(adapter);
719 if (err != 0) {
720 printk(KERN_ERR "Failed to init firmware\n");
721 return -EIO;
722 }
723 netxen_nic_flash_print(adapter);
724
725 /* setup all the resources for the Phantom... */
726 /* this include the descriptors for rcv, tx, and status */
727 netxen_nic_clear_stats(adapter);
728 err = netxen_nic_hw_resources(adapter);
729 if (err) {
730 printk(KERN_ERR "Error in setting hw resources:%d\n",
731 err);
732 return err;
733 }
734 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
735 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
736 netxen_post_rx_buffers(adapter, ctx, ring);
737 }
738 adapter->irq = adapter->ahw.pdev->irq;
739 err = request_irq(adapter->ahw.pdev->irq, netxen_intr,
740 IRQF_SHARED|IRQF_SAMPLE_RANDOM, netdev->name,
741 adapter);
742 if (err) {
743 printk(KERN_ERR "request_irq failed with: %d\n", err);
744 netxen_free_hw_resources(adapter);
745 return err;
746 }
747
748 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
749 }
750 if (!adapter->driver_mismatch)
751 mod_timer(&adapter->watchdog_timer, jiffies);
752
753 netxen_nic_enable_int(adapter);
754
755 /* Done here again so that even if phantom sw overwrote it,
756 * we set it */
757 if (adapter->macaddr_set)
758 adapter->macaddr_set(adapter, netdev->dev_addr);
759 if (adapter->init_port
760 && adapter->init_port(adapter, adapter->portnum) != 0) {
761 del_timer_sync(&adapter->watchdog_timer);
762 printk(KERN_ERR "%s: Failed to initialize port %d\n",
763 netxen_nic_driver_name, adapter->portnum);
764 return -EIO;
765 }
766
767 netxen_nic_set_link_parameters(adapter);
768
769 netxen_nic_set_multi(netdev);
770 if (adapter->set_mtu)
771 adapter->set_mtu(adapter, netdev->mtu);
772
773 if (!adapter->driver_mismatch)
774 netif_start_queue(netdev);
775
776 return 0;
777 }
778
779 /*
780 * netxen_nic_close - Disables a network interface entry point
781 */
782 static int netxen_nic_close(struct net_device *netdev)
783 {
784 struct netxen_adapter *adapter = netdev_priv(netdev);
785 int i, j;
786 struct netxen_cmd_buffer *cmd_buff;
787 struct netxen_skb_frag *buffrag;
788
789 netif_carrier_off(netdev);
790 netif_stop_queue(netdev);
791
792 cmd_buff = adapter->cmd_buf_arr;
793 for (i = 0; i < adapter->max_tx_desc_count; i++) {
794 buffrag = cmd_buff->frag_array;
795 if (buffrag->dma) {
796 pci_unmap_single(adapter->pdev, buffrag->dma,
797 buffrag->length, PCI_DMA_TODEVICE);
798 buffrag->dma = (u64) NULL;
799 }
800 for (j = 0; j < cmd_buff->frag_count; j++) {
801 buffrag++;
802 if (buffrag->dma) {
803 pci_unmap_page(adapter->pdev, buffrag->dma,
804 buffrag->length,
805 PCI_DMA_TODEVICE);
806 buffrag->dma = (u64) NULL;
807 }
808 }
809 /* Free the skb we received in netxen_nic_xmit_frame */
810 if (cmd_buff->skb) {
811 dev_kfree_skb_any(cmd_buff->skb);
812 cmd_buff->skb = NULL;
813 }
814 cmd_buff++;
815 }
816 FLUSH_SCHEDULED_WORK();
817 del_timer_sync(&adapter->watchdog_timer);
818
819 return 0;
820 }
821
822 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
823 {
824 struct netxen_adapter *adapter = netdev_priv(netdev);
825 struct netxen_hardware_context *hw = &adapter->ahw;
826 unsigned int first_seg_len = skb->len - skb->data_len;
827 struct netxen_skb_frag *buffrag;
828 unsigned int i;
829
830 u32 producer = 0;
831 u32 saved_producer = 0;
832 struct cmd_desc_type0 *hwdesc;
833 int k;
834 struct netxen_cmd_buffer *pbuf = NULL;
835 static int dropped_packet = 0;
836 int frag_count;
837 u32 local_producer = 0;
838 u32 max_tx_desc_count = 0;
839 u32 last_cmd_consumer = 0;
840 int no_of_desc;
841
842 adapter->stats.xmitcalled++;
843 frag_count = skb_shinfo(skb)->nr_frags + 1;
844
845 if (unlikely(skb->len <= 0)) {
846 dev_kfree_skb_any(skb);
847 adapter->stats.badskblen++;
848 return NETDEV_TX_OK;
849 }
850
851 if (frag_count > MAX_BUFFERS_PER_CMD) {
852 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
853 "too large, can handle only %d frags\n",
854 netxen_nic_driver_name, netdev->name,
855 frag_count, MAX_BUFFERS_PER_CMD);
856 adapter->stats.txdropped++;
857 if ((++dropped_packet & 0xff) == 0xff)
858 printk("%s: %s droppped packets = %d\n",
859 netxen_nic_driver_name, netdev->name,
860 dropped_packet);
861
862 return NETDEV_TX_OK;
863 }
864
865 /*
866 * Everything is set up. Now, we just need to transmit it out.
867 * Note that we have to copy the contents of buffer over to
868 * right place. Later on, this can be optimized out by de-coupling the
869 * producer index from the buffer index.
870 */
871 retry_getting_window:
872 spin_lock_bh(&adapter->tx_lock);
873 if (adapter->total_threads >= MAX_XMIT_PRODUCERS) {
874 spin_unlock_bh(&adapter->tx_lock);
875 /*
876 * Yield CPU
877 */
878 if (!in_atomic())
879 schedule();
880 else {
881 for (i = 0; i < 20; i++)
882 cpu_relax(); /*This a nop instr on i386 */
883 }
884 goto retry_getting_window;
885 }
886 local_producer = adapter->cmd_producer;
887 /* There 4 fragments per descriptor */
888 no_of_desc = (frag_count + 3) >> 2;
889 if (netdev->features & NETIF_F_TSO) {
890 if (skb_shinfo(skb)->gso_size > 0) {
891
892 no_of_desc++;
893 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
894 sizeof(struct ethhdr)) >
895 (sizeof(struct cmd_desc_type0) - 2)) {
896 no_of_desc++;
897 }
898 }
899 }
900 k = adapter->cmd_producer;
901 max_tx_desc_count = adapter->max_tx_desc_count;
902 last_cmd_consumer = adapter->last_cmd_consumer;
903 if ((k + no_of_desc) >=
904 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
905 last_cmd_consumer)) {
906 netif_stop_queue(netdev);
907 adapter->flags |= NETXEN_NETDEV_STATUS;
908 spin_unlock_bh(&adapter->tx_lock);
909 return NETDEV_TX_BUSY;
910 }
911 k = get_index_range(k, max_tx_desc_count, no_of_desc);
912 adapter->cmd_producer = k;
913 adapter->total_threads++;
914 adapter->num_threads++;
915
916 spin_unlock_bh(&adapter->tx_lock);
917 /* Copy the descriptors into the hardware */
918 producer = local_producer;
919 saved_producer = producer;
920 hwdesc = &hw->cmd_desc_head[producer];
921 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
922 /* Take skb->data itself */
923 pbuf = &adapter->cmd_buf_arr[producer];
924 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
925 pbuf->mss = skb_shinfo(skb)->gso_size;
926 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
927 } else {
928 pbuf->mss = 0;
929 hwdesc->mss = 0;
930 }
931 pbuf->total_length = skb->len;
932 pbuf->skb = skb;
933 pbuf->cmd = TX_ETHER_PKT;
934 pbuf->frag_count = frag_count;
935 pbuf->port = adapter->portnum;
936 buffrag = &pbuf->frag_array[0];
937 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
938 PCI_DMA_TODEVICE);
939 buffrag->length = first_seg_len;
940 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
941 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
942 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
943
944 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
945 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
946 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
947 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
948
949 for (i = 1, k = 1; i < frag_count; i++, k++) {
950 struct skb_frag_struct *frag;
951 int len, temp_len;
952 unsigned long offset;
953 dma_addr_t temp_dma;
954
955 /* move to next desc. if there is a need */
956 if ((i & 0x3) == 0) {
957 k = 0;
958 producer = get_next_index(producer,
959 adapter->max_tx_desc_count);
960 hwdesc = &hw->cmd_desc_head[producer];
961 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
962 }
963 frag = &skb_shinfo(skb)->frags[i - 1];
964 len = frag->size;
965 offset = frag->page_offset;
966
967 temp_len = len;
968 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
969 len, PCI_DMA_TODEVICE);
970
971 buffrag++;
972 buffrag->dma = temp_dma;
973 buffrag->length = temp_len;
974
975 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
976 switch (k) {
977 case 0:
978 hwdesc->buffer1_length = cpu_to_le16(temp_len);
979 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
980 break;
981 case 1:
982 hwdesc->buffer2_length = cpu_to_le16(temp_len);
983 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
984 break;
985 case 2:
986 hwdesc->buffer3_length = cpu_to_le16(temp_len);
987 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
988 break;
989 case 3:
990 hwdesc->buffer4_length = cpu_to_le16(temp_len);
991 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
992 break;
993 }
994 frag++;
995 }
996 producer = get_next_index(producer, adapter->max_tx_desc_count);
997
998 /* might change opcode to TX_TCP_LSO */
999 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1000
1001 /* For LSO, we need to copy the MAC/IP/TCP headers into
1002 * the descriptor ring
1003 */
1004 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1005 == TX_TCP_LSO) {
1006 int hdr_len, first_hdr_len, more_hdr;
1007 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1008 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1009 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1010 more_hdr = 1;
1011 } else {
1012 first_hdr_len = hdr_len;
1013 more_hdr = 0;
1014 }
1015 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1016 hwdesc = &hw->cmd_desc_head[producer];
1017
1018 /* copy the first 64 bytes */
1019 memcpy(((void *)hwdesc) + 2,
1020 (void *)(skb->data), first_hdr_len);
1021 producer = get_next_index(producer, max_tx_desc_count);
1022
1023 if (more_hdr) {
1024 hwdesc = &hw->cmd_desc_head[producer];
1025 /* copy the next 64 bytes - should be enough except
1026 * for pathological case
1027 */
1028 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1029 hwdesc,
1030 (hdr_len -
1031 first_hdr_len));
1032 producer = get_next_index(producer, max_tx_desc_count);
1033 }
1034 }
1035
1036 i = netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
1037
1038 hw->cmd_desc_head[saved_producer].flags_opcode =
1039 cpu_to_le16(hw->cmd_desc_head[saved_producer].flags_opcode);
1040 hw->cmd_desc_head[saved_producer].num_of_buffers_total_length =
1041 cpu_to_le32(hw->cmd_desc_head[saved_producer].
1042 num_of_buffers_total_length);
1043
1044 spin_lock_bh(&adapter->tx_lock);
1045 adapter->stats.txbytes += i;
1046
1047 /* Code to update the adapter considering how many producer threads
1048 are currently working */
1049 if ((--adapter->num_threads) == 0) {
1050 /* This is the last thread */
1051 u32 crb_producer = adapter->cmd_producer;
1052 netxen_nic_update_cmd_producer(adapter, crb_producer);
1053 wmb();
1054 adapter->total_threads = 0;
1055 }
1056
1057 adapter->stats.xmitfinished++;
1058 spin_unlock_bh(&adapter->tx_lock);
1059
1060 netdev->trans_start = jiffies;
1061
1062 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
1063
1064 DPRINTK(INFO, "Done. Send\n");
1065 return NETDEV_TX_OK;
1066 }
1067
1068 static void netxen_watchdog(unsigned long v)
1069 {
1070 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1071
1072 SCHEDULE_WORK(&adapter->watchdog_task);
1073 }
1074
1075 static void netxen_tx_timeout(struct net_device *netdev)
1076 {
1077 struct netxen_adapter *adapter = (struct netxen_adapter *)
1078 netdev_priv(netdev);
1079 SCHEDULE_WORK(&adapter->tx_timeout_task);
1080 }
1081
1082 static void netxen_tx_timeout_task(struct work_struct *work)
1083 {
1084 struct netxen_adapter *adapter =
1085 container_of(work, struct netxen_adapter, tx_timeout_task);
1086 unsigned long flags;
1087
1088 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1089 netxen_nic_driver_name, adapter->netdev->name);
1090
1091 spin_lock_irqsave(&adapter->lock, flags);
1092 netxen_nic_close(adapter->netdev);
1093 netxen_nic_open(adapter->netdev);
1094 spin_unlock_irqrestore(&adapter->lock, flags);
1095 adapter->netdev->trans_start = jiffies;
1096 netif_wake_queue(adapter->netdev);
1097 }
1098
1099 static int
1100 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
1101 {
1102 u32 ret = 0;
1103
1104 DPRINTK(INFO, "Entered handle ISR\n");
1105 adapter->stats.ints++;
1106
1107 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
1108 int count = 0;
1109 u32 mask;
1110 u32 our_int = 0;
1111 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1112 /* not our interrupt */
1113 if ((our_int & (0x80 << adapter->portnum)) == 0)
1114 return ret;
1115 netxen_nic_disable_int(adapter);
1116 /* Window = 0 or 1 */
1117 do {
1118 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
1119 ISR_INT_TARGET_STATUS));
1120 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
1121 } while (((mask & 0x80) != 0) && (++count < 32));
1122 if ((mask & 0x80) != 0)
1123 printk("Could not disable interrupt completely\n");
1124
1125 }
1126
1127 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
1128 if (netif_rx_schedule_prep(netdev)) {
1129 /*
1130 * Interrupts are already disabled.
1131 */
1132 __netif_rx_schedule(netdev);
1133 } else {
1134 static unsigned int intcount = 0;
1135 if ((++intcount & 0xfff) == 0xfff)
1136 printk(KERN_ERR
1137 "%s: %s interrupt %d while in poll\n",
1138 netxen_nic_driver_name, netdev->name,
1139 intcount);
1140 }
1141 ret = 1;
1142 }
1143
1144 if (ret == 0) {
1145 netxen_nic_enable_int(adapter);
1146 }
1147
1148 return ret;
1149 }
1150
1151 /*
1152 * netxen_intr - Interrupt Handler
1153 * @irq: interrupt number
1154 * data points to adapter stucture (which may be handling more than 1 port
1155 */
1156 irqreturn_t netxen_intr(int irq, void *data)
1157 {
1158 struct netxen_adapter *adapter;
1159 struct net_device *netdev;
1160
1161 if (unlikely(!irq)) {
1162 return IRQ_NONE; /* Not our interrupt */
1163 }
1164
1165 adapter = (struct netxen_adapter *)data;
1166 netdev = adapter->netdev;
1167 /* process our status queue (for all 4 ports) */
1168 if (netif_running(netdev))
1169 netxen_handle_int(adapter, netdev);
1170
1171 return IRQ_HANDLED;
1172 }
1173
1174 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1175 {
1176 struct netxen_adapter *adapter = netdev_priv(netdev);
1177 int work_to_do = min(*budget, netdev->quota);
1178 int done = 1;
1179 int ctx;
1180 int this_work_done;
1181 int work_done = 0;
1182
1183 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1184
1185 work_done = 0;
1186 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1187 /*
1188 * Fairness issue. This will give undue weight to the
1189 * receive context 0.
1190 */
1191
1192 /*
1193 * To avoid starvation, we give each of our receivers,
1194 * a fraction of the quota. Sometimes, it might happen that we
1195 * have enough quota to process every packet, but since all the
1196 * packets are on one context, it gets only half of the quota,
1197 * and ends up not processing it.
1198 */
1199 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1200 work_to_do /
1201 MAX_RCV_CTX);
1202 work_done += this_work_done;
1203 }
1204
1205 netdev->quota -= work_done;
1206 *budget -= work_done;
1207
1208 if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
1209 done = 0;
1210
1211 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1212 done = 0;
1213
1214 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1215 work_done, work_to_do);
1216 if (done) {
1217 netif_rx_complete(netdev);
1218 netxen_nic_enable_int(adapter);
1219 }
1220
1221 return !done;
1222 }
1223
1224 #ifdef CONFIG_NET_POLL_CONTROLLER
1225 static void netxen_nic_poll_controller(struct net_device *netdev)
1226 {
1227 struct netxen_adapter *adapter = netdev_priv(netdev);
1228 disable_irq(adapter->irq);
1229 netxen_intr(adapter->irq, adapter);
1230 enable_irq(adapter->irq);
1231 }
1232 #endif
1233
1234 static struct pci_driver netxen_driver = {
1235 .name = netxen_nic_driver_name,
1236 .id_table = netxen_pci_tbl,
1237 .probe = netxen_nic_probe,
1238 .remove = __devexit_p(netxen_nic_remove)
1239 };
1240
1241 /* Driver Registration on NetXen card */
1242
1243 static int __init netxen_init_module(void)
1244 {
1245 if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
1246 return -ENOMEM;
1247
1248 return pci_register_driver(&netxen_driver);
1249 }
1250
1251 module_init(netxen_init_module);
1252
1253 static void __exit netxen_exit_module(void)
1254 {
1255 /*
1256 * Wait for some time to allow the dma to drain, if any.
1257 */
1258 pci_unregister_driver(&netxen_driver);
1259 destroy_workqueue(netxen_workq);
1260 }
1261
1262 module_exit(netxen_exit_module);
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