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WorkQueue: Fix up arch-specific work items where possible
[linux-2.6/verdex.git] / drivers / net / netxen / netxen_nic_main.c
blobdf0bb36a1cfbe22c685139849b8db1ba7b224376
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 "netxen_nic_hw.h"
36
37 #include "netxen_nic.h"
38 #define DEFINE_GLOBAL_RECV_CRB
39 #include "netxen_nic_phan_reg.h"
40 #include "netxen_nic_ioctl.h"
41
42 #include <linux/dma-mapping.h>
43 #include <linux/vmalloc.h>
44
45 #define PHAN_VENDOR_ID 0x4040
46
47 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
48 MODULE_LICENSE("GPL");
49 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
50
51 char netxen_nic_driver_name[] = "netxen";
52 static char netxen_nic_driver_string[] = "NetXen Network Driver version "
53 NETXEN_NIC_LINUX_VERSIONID;
54
55 #define NETXEN_NETDEV_WEIGHT 120
56 #define NETXEN_ADAPTER_UP_MAGIC 777
57 #define NETXEN_NIC_PEG_TUNE 0
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_ioctl(struct net_device *netdev,
71 struct ifreq *ifr, int cmd);
72 static int netxen_nic_poll(struct net_device *dev, int *budget);
73 #ifdef CONFIG_NET_POLL_CONTROLLER
74 static void netxen_nic_poll_controller(struct net_device *netdev);
75 #endif
76 static irqreturn_t netxen_intr(int irq, void *data);
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 {0,}
86 };
87
88 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
89
90 /*
91 * netxen_nic_probe()
92 *
93 * The Linux system will invoke this after identifying the vendor ID and
94 * device Id in the pci_tbl supported by this module.
95 *
96 * A quad port card has one operational PCI config space, (function 0),
97 * which is used to access all four ports.
98 *
99 * This routine will initialize the adapter, and setup the global parameters
100 * along with the port's specific structure.
101 */
102 static int __devinit
103 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
104 {
105 struct net_device *netdev = NULL;
106 struct netxen_adapter *adapter = NULL;
107 struct netxen_port *port = NULL;
108 u8 *mem_ptr0 = NULL;
109 u8 *mem_ptr1 = NULL;
110 u8 *mem_ptr2 = NULL;
111
112 unsigned long mem_base, mem_len;
113 int pci_using_dac, i, err;
114 int ring;
115 struct netxen_recv_context *recv_ctx = NULL;
116 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
117 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
118 u64 mac_addr[FLASH_NUM_PORTS + 1];
119 int valid_mac;
120
121 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
122 if ((err = pci_enable_device(pdev)))
123 return err;
124 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
125 err = -ENODEV;
126 goto err_out_disable_pdev;
127 }
128
129 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
130 goto err_out_disable_pdev;
131
132 pci_set_master(pdev);
133 if ((pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) &&
134 (pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK) == 0))
135 pci_using_dac = 1;
136 else {
137 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
138 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
139 goto err_out_free_res;
140
141 pci_using_dac = 0;
142 }
143
144 /* remap phys address */
145 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
146 mem_len = pci_resource_len(pdev, 0);
147
148 /* 128 Meg of memory */
149 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
150 mem_ptr1 =
151 ioremap(mem_base + SECOND_PAGE_GROUP_START, SECOND_PAGE_GROUP_SIZE);
152 mem_ptr2 =
153 ioremap(mem_base + THIRD_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
154
155 if ((mem_ptr0 == 0UL) || (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
156 DPRINTK(1, ERR,
157 "Cannot remap adapter memory aborting.:"
158 "0 -> %p, 1 -> %p, 2 -> %p\n",
159 mem_ptr0, mem_ptr1, mem_ptr2);
160
161 err = -EIO;
162 if (mem_ptr0)
163 iounmap(mem_ptr0);
164 if (mem_ptr1)
165 iounmap(mem_ptr1);
166 if (mem_ptr2)
167 iounmap(mem_ptr2);
168
169 goto err_out_free_res;
170 }
171
172 /*
173 * Allocate a adapter structure which will manage all the initialization
174 * as well as the common resources for all ports...
175 * all the ports will have pointer to this adapter as well as Adapter
176 * will have pointers of all the ports structures.
177 */
178
179 /* One adapter structure for all 4 ports.... */
180 adapter = kzalloc(sizeof(struct netxen_adapter), GFP_KERNEL);
181 if (adapter == NULL) {
182 printk(KERN_ERR "%s: Could not allocate adapter memory:%d\n",
183 netxen_nic_driver_name,
184 (int)sizeof(struct netxen_adapter));
185 err = -ENOMEM;
186 goto err_out_iounmap;
187 }
188
189 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS;
190 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
191 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
192
193 pci_set_drvdata(pdev, adapter);
194
195 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
196 if (cmd_buf_arr == NULL) {
197 err = -ENOMEM;
198 goto err_out_free_adapter;
199 }
200 memset(cmd_buf_arr, 0, TX_RINGSIZE);
201
202 for (i = 0; i < MAX_RCV_CTX; ++i) {
203 recv_ctx = &adapter->recv_ctx[i];
204 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
205 rcv_desc = &recv_ctx->rcv_desc[ring];
206 switch (RCV_DESC_TYPE(ring)) {
207 case RCV_DESC_NORMAL:
208 rcv_desc->max_rx_desc_count =
209 adapter->max_rx_desc_count;
210 rcv_desc->flags = RCV_DESC_NORMAL;
211 rcv_desc->dma_size = RX_DMA_MAP_LEN;
212 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
213 break;
214
215 case RCV_DESC_JUMBO:
216 rcv_desc->max_rx_desc_count =
217 adapter->max_jumbo_rx_desc_count;
218 rcv_desc->flags = RCV_DESC_JUMBO;
219 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
220 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
221 break;
222
223 }
224 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
225 vmalloc(RCV_BUFFSIZE);
226
227 if (rcv_desc->rx_buf_arr == NULL) {
228 err = -ENOMEM;
229 goto err_out_free_rx_buffer;
230 }
231 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
232 }
233
234 }
235
236 adapter->ops = kzalloc(sizeof(struct netxen_drvops), GFP_KERNEL);
237 if (adapter->ops == NULL) {
238 printk(KERN_ERR
239 "%s: Could not allocate memory for adapter->ops:%d\n",
240 netxen_nic_driver_name,
241 (int)sizeof(struct netxen_adapter));
242 err = -ENOMEM;
243 goto err_out_free_rx_buffer;
244 }
245
246 adapter->cmd_buf_arr = cmd_buf_arr;
247 adapter->ahw.pci_base0 = mem_ptr0;
248 adapter->ahw.pci_base1 = mem_ptr1;
249 adapter->ahw.pci_base2 = mem_ptr2;
250 spin_lock_init(&adapter->tx_lock);
251 spin_lock_init(&adapter->lock);
252 #ifdef CONFIG_IA64
253 netxen_pinit_from_rom(adapter, 0);
254 udelay(500);
255 netxen_load_firmware(adapter);
256 #endif
257
258 /* initialize the buffers in adapter */
259 netxen_initialize_adapter_sw(adapter);
260 /*
261 * Set the CRB window to invalid. If any register in window 0 is
262 * accessed it should set the window to 0 and then reset it to 1.
263 */
264 adapter->curr_window = 255;
265 /*
266 * Adapter in our case is quad port so initialize it before
267 * initializing the ports
268 */
269 netxen_initialize_adapter_hw(adapter); /* initialize the adapter */
270
271 netxen_initialize_adapter_ops(adapter);
272
273 init_timer(&adapter->watchdog_timer);
274 adapter->ahw.xg_linkup = 0;
275 adapter->watchdog_timer.function = &netxen_watchdog;
276 adapter->watchdog_timer.data = (unsigned long)adapter;
277 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
278 adapter->ahw.pdev = pdev;
279 adapter->proc_cmd_buf_counter = 0;
280 pci_read_config_byte(pdev, PCI_REVISION_ID, &adapter->ahw.revision_id);
281
282 if (pci_enable_msi(pdev)) {
283 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
284 printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
285 " error\n", netxen_nic_driver_name);
286 } else
287 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
288
289 if (netxen_is_flash_supported(adapter) == 0 &&
290 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
291 valid_mac = 1;
292 else
293 valid_mac = 0;
294
295 /*
296 * Initialize all the CRB registers here.
297 */
298 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
299 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
300 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
301
302 /* Unlock the HW, prompting the boot sequence */
303 writel(1,
304 NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
305
306 /* Handshake with the card before we register the devices. */
307 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
308
309 /* initialize the all the ports */
310
311 for (i = 0; i < adapter->ahw.max_ports; i++) {
312 netdev = alloc_etherdev(sizeof(struct netxen_port));
313 if (!netdev) {
314 printk(KERN_ERR "%s: could not allocate netdev for port"
315 " %d\n", netxen_nic_driver_name, i + 1);
316 goto err_out_free_dev;
317 }
318
319 SET_MODULE_OWNER(netdev);
320 SET_NETDEV_DEV(netdev, &pdev->dev);
321
322 port = netdev_priv(netdev);
323 port->netdev = netdev;
324 port->pdev = pdev;
325 port->adapter = adapter;
326 port->portnum = i; /* Gigabit port number from 0-3 */
327
328 netdev->open = netxen_nic_open;
329 netdev->stop = netxen_nic_close;
330 netdev->hard_start_xmit = netxen_nic_xmit_frame;
331 netdev->get_stats = netxen_nic_get_stats;
332 netdev->set_multicast_list = netxen_nic_set_multi;
333 netdev->set_mac_address = netxen_nic_set_mac;
334 netdev->change_mtu = netxen_nic_change_mtu;
335 netdev->do_ioctl = netxen_nic_ioctl;
336 netdev->tx_timeout = netxen_tx_timeout;
337 netdev->watchdog_timeo = HZ;
338
339 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
340 netdev->poll = netxen_nic_poll;
341 netdev->weight = NETXEN_NETDEV_WEIGHT;
342 #ifdef CONFIG_NET_POLL_CONTROLLER
343 netdev->poll_controller = netxen_nic_poll_controller;
344 #endif
345 /* ScatterGather support */
346 netdev->features = NETIF_F_SG;
347 netdev->features |= NETIF_F_IP_CSUM;
348 netdev->features |= NETIF_F_TSO;
349
350 if (pci_using_dac)
351 netdev->features |= NETIF_F_HIGHDMA;
352
353 if (valid_mac) {
354 unsigned char *p = (unsigned char *)&mac_addr[i];
355 netdev->dev_addr[0] = *(p + 5);
356 netdev->dev_addr[1] = *(p + 4);
357 netdev->dev_addr[2] = *(p + 3);
358 netdev->dev_addr[3] = *(p + 2);
359 netdev->dev_addr[4] = *(p + 1);
360 netdev->dev_addr[5] = *(p + 0);
361
362 memcpy(netdev->perm_addr, netdev->dev_addr,
363 netdev->addr_len);
364 if (!is_valid_ether_addr(netdev->perm_addr)) {
365 printk(KERN_ERR "%s: Bad MAC address "
366 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
367 netxen_nic_driver_name,
368 netdev->dev_addr[0],
369 netdev->dev_addr[1],
370 netdev->dev_addr[2],
371 netdev->dev_addr[3],
372 netdev->dev_addr[4],
373 netdev->dev_addr[5]);
374 } else {
375 if (adapter->ops->macaddr_set)
376 adapter->ops->macaddr_set(port,
377 netdev->
378 dev_addr);
379 }
380 }
381 adapter->netdev = netdev;
382 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
383 netif_carrier_off(netdev);
384 netif_stop_queue(netdev);
385
386 if ((err = register_netdev(netdev))) {
387 printk(KERN_ERR "%s: register_netdev failed port #%d"
388 " aborting\n", netxen_nic_driver_name, i + 1);
389 err = -EIO;
390 free_netdev(netdev);
391 goto err_out_free_dev;
392 }
393 adapter->port_count++;
394 adapter->active_ports = 0;
395 adapter->port[i] = port;
396 }
397
398 /*
399 * delay a while to ensure that the Pegs are up & running.
400 * Otherwise, we might see some flaky behaviour.
401 */
402 udelay(100);
403
404 switch (adapter->ahw.board_type) {
405 case NETXEN_NIC_GBE:
406 printk("%s: QUAD GbE board initialized\n",
407 netxen_nic_driver_name);
408 break;
409
410 case NETXEN_NIC_XGBE:
411 printk("%s: XGbE board initialized\n", netxen_nic_driver_name);
412 break;
413 }
414
415 adapter->driver_mismatch = 0;
416
417 return 0;
418
419 err_out_free_dev:
420 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
421 pci_disable_msi(pdev);
422 for (i = 0; i < adapter->port_count; i++) {
423 port = adapter->port[i];
424 if ((port) && (port->netdev)) {
425 unregister_netdev(port->netdev);
426 free_netdev(port->netdev);
427 }
428 }
429 kfree(adapter->ops);
430
431 err_out_free_rx_buffer:
432 for (i = 0; i < MAX_RCV_CTX; ++i) {
433 recv_ctx = &adapter->recv_ctx[i];
434 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
435 rcv_desc = &recv_ctx->rcv_desc[ring];
436 if (rcv_desc->rx_buf_arr != NULL) {
437 vfree(rcv_desc->rx_buf_arr);
438 rcv_desc->rx_buf_arr = NULL;
439 }
440 }
441 }
442
443 vfree(cmd_buf_arr);
444
445 kfree(adapter->port);
446
447 err_out_free_adapter:
448 pci_set_drvdata(pdev, NULL);
449 kfree(adapter);
450
451 err_out_iounmap:
452 iounmap(mem_ptr0);
453 iounmap(mem_ptr1);
454 iounmap(mem_ptr2);
455
456 err_out_free_res:
457 pci_release_regions(pdev);
458 err_out_disable_pdev:
459 pci_disable_device(pdev);
460 return err;
461 }
462
463 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
464 {
465 struct netxen_adapter *adapter;
466 struct netxen_port *port;
467 struct netxen_rx_buffer *buffer;
468 struct netxen_recv_context *recv_ctx;
469 struct netxen_rcv_desc_ctx *rcv_desc;
470 int i;
471 int ctxid, ring;
472
473 adapter = pci_get_drvdata(pdev);
474 if (adapter == NULL)
475 return;
476
477 netxen_nic_stop_all_ports(adapter);
478 /* leave the hw in the same state as reboot */
479 netxen_pinit_from_rom(adapter, 0);
480 udelay(500);
481 netxen_load_firmware(adapter);
482
483 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
484 netxen_nic_disable_int(adapter);
485
486 udelay(500); /* Delay for a while to drain the DMA engines */
487 for (i = 0; i < adapter->port_count; i++) {
488 port = adapter->port[i];
489 if ((port) && (port->netdev)) {
490 unregister_netdev(port->netdev);
491 free_netdev(port->netdev);
492 }
493 }
494
495 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
496 pci_disable_msi(pdev);
497 pci_set_drvdata(pdev, NULL);
498 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
499 netxen_free_hw_resources(adapter);
500
501 iounmap(adapter->ahw.pci_base0);
502 iounmap(adapter->ahw.pci_base1);
503 iounmap(adapter->ahw.pci_base2);
504
505 pci_release_regions(pdev);
506 pci_disable_device(pdev);
507
508 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
509 recv_ctx = &adapter->recv_ctx[ctxid];
510 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
511 rcv_desc = &recv_ctx->rcv_desc[ring];
512 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
513 buffer = &(rcv_desc->rx_buf_arr[i]);
514 if (buffer->state == NETXEN_BUFFER_FREE)
515 continue;
516 pci_unmap_single(pdev, buffer->dma,
517 rcv_desc->dma_size,
518 PCI_DMA_FROMDEVICE);
519 if (buffer->skb != NULL)
520 dev_kfree_skb_any(buffer->skb);
521 }
522 vfree(rcv_desc->rx_buf_arr);
523 }
524 }
525
526 vfree(adapter->cmd_buf_arr);
527 kfree(adapter->ops);
528 kfree(adapter);
529 }
530
531 /*
532 * Called when a network interface is made active
533 * @returns 0 on success, negative value on failure
534 */
535 static int netxen_nic_open(struct net_device *netdev)
536 {
537 struct netxen_port *port = netdev_priv(netdev);
538 struct netxen_adapter *adapter = port->adapter;
539 int err = 0;
540 int ctx, ring;
541
542 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
543 err = netxen_init_firmware(adapter);
544 if (err != 0) {
545 printk(KERN_ERR "Failed to init firmware\n");
546 return -EIO;
547 }
548 netxen_nic_flash_print(adapter);
549
550 /* setup all the resources for the Phantom... */
551 /* this include the descriptors for rcv, tx, and status */
552 netxen_nic_clear_stats(adapter);
553 err = netxen_nic_hw_resources(adapter);
554 if (err) {
555 printk(KERN_ERR "Error in setting hw resources:%d\n",
556 err);
557 return err;
558 }
559 if (adapter->ops->init_port
560 && adapter->ops->init_port(adapter, port->portnum) != 0) {
561 printk(KERN_ERR "%s: Failed to initialize port %d\n",
562 netxen_nic_driver_name, port->portnum);
563 netxen_free_hw_resources(adapter);
564 return -EIO;
565 }
566 if (adapter->ops->init_niu)
567 adapter->ops->init_niu(adapter);
568 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
569 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
570 netxen_post_rx_buffers(adapter, ctx, ring);
571 }
572 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
573 }
574 adapter->active_ports++;
575 if (adapter->active_ports == 1) {
576 err = request_irq(adapter->ahw.pdev->irq, &netxen_intr,
577 SA_SHIRQ | SA_SAMPLE_RANDOM, netdev->name,
578 adapter);
579 if (err) {
580 printk(KERN_ERR "request_irq failed with: %d\n", err);
581 adapter->active_ports--;
582 return err;
583 }
584 adapter->irq = adapter->ahw.pdev->irq;
585 if (!adapter->driver_mismatch)
586 mod_timer(&adapter->watchdog_timer, jiffies);
587
588 netxen_nic_enable_int(adapter);
589 }
590
591 /* Done here again so that even if phantom sw overwrote it,
592 * we set it */
593 if (adapter->ops->macaddr_set)
594 adapter->ops->macaddr_set(port, netdev->dev_addr);
595 netxen_nic_set_link_parameters(port);
596
597 netxen_nic_set_multi(netdev);
598 if (!adapter->driver_mismatch)
599 netif_start_queue(netdev);
600
601 return 0;
602 }
603
604 /*
605 * netxen_nic_close - Disables a network interface entry point
606 */
607 static int netxen_nic_close(struct net_device *netdev)
608 {
609 struct netxen_port *port = netdev_priv(netdev);
610 struct netxen_adapter *adapter = port->adapter;
611 int i, j;
612 struct netxen_cmd_buffer *cmd_buff;
613 struct netxen_skb_frag *buffrag;
614
615 netif_carrier_off(netdev);
616 netif_stop_queue(netdev);
617
618 adapter->active_ports--;
619
620 if (!adapter->active_ports) {
621 netxen_nic_disable_int(adapter);
622 if (adapter->irq)
623 free_irq(adapter->irq, adapter);
624 cmd_buff = adapter->cmd_buf_arr;
625 for (i = 0; i < adapter->max_tx_desc_count; i++) {
626 buffrag = cmd_buff->frag_array;
627 if (buffrag->dma) {
628 pci_unmap_single(port->pdev, buffrag->dma,
629 buffrag->length,
630 PCI_DMA_TODEVICE);
631 buffrag->dma = (u64) NULL;
632 }
633 for (j = 0; j < cmd_buff->frag_count; j++) {
634 buffrag++;
635 if (buffrag->dma) {
636 pci_unmap_page(port->pdev,
637 buffrag->dma,
638 buffrag->length,
639 PCI_DMA_TODEVICE);
640 buffrag->dma = (u64) NULL;
641 }
642 }
643 /* Free the skb we received in netxen_nic_xmit_frame */
644 if (cmd_buff->skb) {
645 dev_kfree_skb_any(cmd_buff->skb);
646 cmd_buff->skb = NULL;
647 }
648 cmd_buff++;
649 }
650 del_timer_sync(&adapter->watchdog_timer);
651 }
652
653 return 0;
654 }
655
656 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
657 {
658 struct netxen_port *port = netdev_priv(netdev);
659 struct netxen_adapter *adapter = port->adapter;
660 struct netxen_hardware_context *hw = &adapter->ahw;
661 unsigned int first_seg_len = skb->len - skb->data_len;
662 struct netxen_skb_frag *buffrag;
663 unsigned int i;
664
665 u32 producer = 0;
666 u32 saved_producer = 0;
667 struct cmd_desc_type0 *hwdesc;
668 int k;
669 struct netxen_cmd_buffer *pbuf = NULL;
670 unsigned int tries = 0;
671 static int dropped_packet = 0;
672 int frag_count;
673 u32 local_producer = 0;
674 u32 max_tx_desc_count = 0;
675 u32 last_cmd_consumer = 0;
676 int no_of_desc;
677
678 port->stats.xmitcalled++;
679 frag_count = skb_shinfo(skb)->nr_frags + 1;
680
681 if (unlikely(skb->len <= 0)) {
682 dev_kfree_skb_any(skb);
683 port->stats.badskblen++;
684 return NETDEV_TX_OK;
685 }
686
687 if (frag_count > MAX_BUFFERS_PER_CMD) {
688 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
689 "too large, can handle only %d frags\n",
690 netxen_nic_driver_name, netdev->name,
691 frag_count, MAX_BUFFERS_PER_CMD);
692 port->stats.txdropped++;
693 if ((++dropped_packet & 0xff) == 0xff)
694 printk("%s: %s droppped packets = %d\n",
695 netxen_nic_driver_name, netdev->name,
696 dropped_packet);
697
698 return NETDEV_TX_OK;
699 }
700
701 /*
702 * Everything is set up. Now, we just need to transmit it out.
703 * Note that we have to copy the contents of buffer over to
704 * right place. Later on, this can be optimized out by de-coupling the
705 * producer index from the buffer index.
706 */
707 retry_getting_window:
708 spin_lock_bh(&adapter->tx_lock);
709 if (adapter->total_threads == MAX_XMIT_PRODUCERS) {
710 spin_unlock_bh(&adapter->tx_lock);
711 /*
712 * Yield CPU
713 */
714 if (!in_atomic())
715 schedule();
716 else {
717 for (i = 0; i < 20; i++)
718 cpu_relax(); /*This a nop instr on i386 */
719 }
720 goto retry_getting_window;
721 }
722 local_producer = adapter->cmd_producer;
723 /* There 4 fragments per descriptor */
724 no_of_desc = (frag_count + 3) >> 2;
725 if (netdev->features & NETIF_F_TSO) {
726 if (skb_shinfo(skb)->gso_size > 0) {
727
728 no_of_desc++;
729 if (((skb->nh.iph)->ihl * sizeof(u32)) +
730 ((skb->h.th)->doff * sizeof(u32)) +
731 sizeof(struct ethhdr) >
732 (sizeof(struct cmd_desc_type0) - NET_IP_ALIGN)) {
733 no_of_desc++;
734 }
735 }
736 }
737 k = adapter->cmd_producer;
738 max_tx_desc_count = adapter->max_tx_desc_count;
739 last_cmd_consumer = adapter->last_cmd_consumer;
740 if ((k + no_of_desc) >=
741 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
742 last_cmd_consumer)) {
743 spin_unlock_bh(&adapter->tx_lock);
744 if (tries == 0) {
745 local_bh_disable();
746 netxen_process_cmd_ring((unsigned long)adapter);
747 local_bh_enable();
748 ++tries;
749 goto retry_getting_window;
750 } else {
751 port->stats.nocmddescriptor++;
752 DPRINTK(ERR, "No command descriptors available,"
753 " producer = %d, consumer = %d count=%llu,"
754 " dropping packet\n", producer,
755 adapter->last_cmd_consumer,
756 port->stats.nocmddescriptor);
757
758 spin_lock_bh(&adapter->tx_lock);
759 netif_stop_queue(netdev);
760 port->flags |= NETXEN_NETDEV_STATUS;
761 spin_unlock_bh(&adapter->tx_lock);
762 return NETDEV_TX_BUSY;
763 }
764 }
765 k = get_index_range(k, max_tx_desc_count, no_of_desc);
766 adapter->cmd_producer = k;
767 adapter->total_threads++;
768 adapter->num_threads++;
769
770 spin_unlock_bh(&adapter->tx_lock);
771 /* Copy the descriptors into the hardware */
772 producer = local_producer;
773 saved_producer = producer;
774 hwdesc = &hw->cmd_desc_head[producer];
775 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
776 /* Take skb->data itself */
777 pbuf = &adapter->cmd_buf_arr[producer];
778 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
779 pbuf->mss = skb_shinfo(skb)->gso_size;
780 hwdesc->mss = skb_shinfo(skb)->gso_size;
781 } else {
782 pbuf->mss = 0;
783 hwdesc->mss = 0;
784 }
785 pbuf->no_of_descriptors = no_of_desc;
786 pbuf->total_length = skb->len;
787 pbuf->skb = skb;
788 pbuf->cmd = TX_ETHER_PKT;
789 pbuf->frag_count = frag_count;
790 pbuf->port = port->portnum;
791 buffrag = &pbuf->frag_array[0];
792 buffrag->dma = pci_map_single(port->pdev, skb->data, first_seg_len,
793 PCI_DMA_TODEVICE);
794 buffrag->length = first_seg_len;
795 CMD_DESC_TOTAL_LENGTH_WRT(hwdesc, skb->len);
796 hwdesc->num_of_buffers = frag_count;
797 hwdesc->opcode = TX_ETHER_PKT;
798
799 CMD_DESC_PORT_WRT(hwdesc, port->portnum);
800 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
801 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
802
803 for (i = 1, k = 1; i < frag_count; i++, k++) {
804 struct skb_frag_struct *frag;
805 int len, temp_len;
806 unsigned long offset;
807 dma_addr_t temp_dma;
808
809 /* move to next desc. if there is a need */
810 if ((i & 0x3) == 0) {
811 k = 0;
812 producer = get_next_index(producer,
813 adapter->max_tx_desc_count);
814 hwdesc = &hw->cmd_desc_head[producer];
815 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
816 }
817 frag = &skb_shinfo(skb)->frags[i - 1];
818 len = frag->size;
819 offset = frag->page_offset;
820
821 temp_len = len;
822 temp_dma = pci_map_page(port->pdev, frag->page, offset,
823 len, PCI_DMA_TODEVICE);
824
825 buffrag++;
826 buffrag->dma = temp_dma;
827 buffrag->length = temp_len;
828
829 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
830 switch (k) {
831 case 0:
832 hwdesc->buffer1_length = cpu_to_le16(temp_len);
833 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
834 break;
835 case 1:
836 hwdesc->buffer2_length = cpu_to_le16(temp_len);
837 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
838 break;
839 case 2:
840 hwdesc->buffer3_length = cpu_to_le16(temp_len);
841 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
842 break;
843 case 3:
844 hwdesc->buffer4_length = temp_len;
845 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
846 break;
847 }
848 frag++;
849 }
850 producer = get_next_index(producer, adapter->max_tx_desc_count);
851
852 /* might change opcode to TX_TCP_LSO */
853 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
854
855 /* For LSO, we need to copy the MAC/IP/TCP headers into
856 * the descriptor ring
857 */
858 if (hw->cmd_desc_head[saved_producer].opcode == TX_TCP_LSO) {
859 int hdr_len, first_hdr_len, more_hdr;
860 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
861 if (hdr_len > (sizeof(struct cmd_desc_type0) - NET_IP_ALIGN)) {
862 first_hdr_len =
863 sizeof(struct cmd_desc_type0) - NET_IP_ALIGN;
864 more_hdr = 1;
865 } else {
866 first_hdr_len = hdr_len;
867 more_hdr = 0;
868 }
869 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
870 hwdesc = &hw->cmd_desc_head[producer];
871
872 /* copy the first 64 bytes */
873 memcpy(((void *)hwdesc) + NET_IP_ALIGN,
874 (void *)(skb->data), first_hdr_len);
875 producer = get_next_index(producer, max_tx_desc_count);
876
877 if (more_hdr) {
878 hwdesc = &hw->cmd_desc_head[producer];
879 /* copy the next 64 bytes - should be enough except
880 * for pathological case
881 */
882 memcpy((void *)hwdesc, (void *)(skb->data) +
883 first_hdr_len, hdr_len - first_hdr_len);
884 producer = get_next_index(producer, max_tx_desc_count);
885 }
886 }
887 spin_lock_bh(&adapter->tx_lock);
888 port->stats.txbytes +=
889 CMD_DESC_TOTAL_LENGTH(&hw->cmd_desc_head[saved_producer]);
890 /* Code to update the adapter considering how many producer threads
891 are currently working */
892 if ((--adapter->num_threads) == 0) {
893 /* This is the last thread */
894 u32 crb_producer = adapter->cmd_producer;
895 writel(crb_producer,
896 NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
897 wmb();
898 adapter->total_threads = 0;
899 } else {
900 u32 crb_producer = 0;
901 crb_producer =
902 readl(NETXEN_CRB_NORMALIZE
903 (adapter, CRB_CMD_PRODUCER_OFFSET));
904 if (crb_producer == local_producer) {
905 crb_producer = get_index_range(crb_producer,
906 max_tx_desc_count,
907 no_of_desc);
908 writel(crb_producer,
909 NETXEN_CRB_NORMALIZE(adapter,
910 CRB_CMD_PRODUCER_OFFSET));
911 wmb();
912 }
913 }
914
915 port->stats.xmitfinished++;
916 spin_unlock_bh(&adapter->tx_lock);
917
918 netdev->trans_start = jiffies;
919
920 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
921
922 DPRINTK(INFO, "Done. Send\n");
923 return NETDEV_TX_OK;
924 }
925
926 static void netxen_watchdog(unsigned long v)
927 {
928 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
929 schedule_work(&adapter->watchdog_task);
930 }
931
932 static void netxen_tx_timeout(struct net_device *netdev)
933 {
934 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
935 struct netxen_adapter *adapter = port->adapter;
936
937 schedule_work(&adapter->tx_timeout_task);
938 }
939
940 static void netxen_tx_timeout_task(struct work_struct *work)
941 {
942 struct netxen_adapter *adapter =
943 container_of(work, struct netxen_adapter, tx_timeout_task);
944 struct net_device *netdev = adapter->netdev;
945 unsigned long flags;
946
947 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
948 netxen_nic_driver_name, netdev->name);
949
950 spin_lock_irqsave(&adapter->lock, flags);
951 netxen_nic_close(netdev);
952 netxen_nic_open(netdev);
953 spin_unlock_irqrestore(&adapter->lock, flags);
954 netdev->trans_start = jiffies;
955 netif_wake_queue(netdev);
956 }
957
958 static int
959 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
960 {
961 u32 ret = 0;
962
963 DPRINTK(INFO, "Entered handle ISR\n");
964
965 adapter->stats.ints++;
966
967 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
968 int count = 0;
969 u32 mask;
970 netxen_nic_disable_int(adapter);
971 /* Window = 0 or 1 */
972 do {
973 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
974 ISR_INT_TARGET_STATUS));
975 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
976 } while (((mask & 0x80) != 0) && (++count < 32));
977 if ((mask & 0x80) != 0)
978 printk("Could not disable interrupt completely\n");
979
980 }
981 adapter->stats.hostints++;
982
983 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
984 if (netif_rx_schedule_prep(netdev)) {
985 /*
986 * Interrupts are already disabled.
987 */
988 __netif_rx_schedule(netdev);
989 } else {
990 static unsigned int intcount = 0;
991 if ((++intcount & 0xfff) == 0xfff)
992 printk(KERN_ERR
993 "%s: %s interrupt %d while in poll\n",
994 netxen_nic_driver_name, netdev->name,
995 intcount);
996 }
997 ret = 1;
998 }
999
1000 if (ret == 0) {
1001 netxen_nic_enable_int(adapter);
1002 }
1003
1004 return ret;
1005 }
1006
1007 /*
1008 * netxen_intr - Interrupt Handler
1009 * @irq: interrupt number
1010 * data points to adapter stucture (which may be handling more than 1 port
1011 */
1012 irqreturn_t netxen_intr(int irq, void *data)
1013 {
1014 struct netxen_adapter *adapter;
1015 struct netxen_port *port;
1016 struct net_device *netdev;
1017 int i;
1018
1019 if (unlikely(!irq)) {
1020 return IRQ_NONE; /* Not our interrupt */
1021 }
1022
1023 adapter = (struct netxen_adapter *)data;
1024 for (i = 0; i < adapter->ahw.max_ports; i++) {
1025 port = adapter->port[i];
1026 netdev = port->netdev;
1027
1028 /* process our status queue (for all 4 ports) */
1029 netxen_handle_int(adapter, netdev);
1030 }
1031
1032 return IRQ_HANDLED;
1033 }
1034
1035 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1036 {
1037 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
1038 struct netxen_adapter *adapter = port->adapter;
1039 int work_to_do = min(*budget, netdev->quota);
1040 int done = 1;
1041 int ctx;
1042 int this_work_done;
1043
1044 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1045 port->stats.polled++;
1046
1047 adapter->work_done = 0;
1048 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1049 /*
1050 * Fairness issue. This will give undue weight to the
1051 * receive context 0.
1052 */
1053
1054 /*
1055 * To avoid starvation, we give each of our receivers,
1056 * a fraction of the quota. Sometimes, it might happen that we
1057 * have enough quota to process every packet, but since all the
1058 * packets are on one context, it gets only half of the quota,
1059 * and ends up not processing it.
1060 */
1061 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1062 work_to_do /
1063 MAX_RCV_CTX);
1064 adapter->work_done += this_work_done;
1065 }
1066
1067 netdev->quota -= adapter->work_done;
1068 *budget -= adapter->work_done;
1069
1070 if (adapter->work_done >= work_to_do
1071 && netxen_nic_rx_has_work(adapter) != 0)
1072 done = 0;
1073
1074 netxen_process_cmd_ring((unsigned long)adapter);
1075
1076 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1077 adapter->work_done, work_to_do);
1078 if (done) {
1079 netif_rx_complete(netdev);
1080 netxen_nic_enable_int(adapter);
1081 }
1082
1083 return !done;
1084 }
1085
1086 #ifdef CONFIG_NET_POLL_CONTROLLER
1087 static void netxen_nic_poll_controller(struct net_device *netdev)
1088 {
1089 struct netxen_port *port = netdev_priv(netdev);
1090 struct netxen_adapter *adapter = port->adapter;
1091 disable_irq(adapter->irq);
1092 netxen_intr(adapter->irq, adapter);
1093 enable_irq(adapter->irq);
1094 }
1095 #endif
1096 /*
1097 * netxen_nic_ioctl () We provide the tcl/phanmon support through these
1098 * ioctls.
1099 */
1100 static int
1101 netxen_nic_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1102 {
1103 int err = 0;
1104 unsigned long nr_bytes = 0;
1105 struct netxen_port *port = netdev_priv(netdev);
1106 struct netxen_adapter *adapter = port->adapter;
1107 char dev_name[NETXEN_NIC_NAME_LEN];
1108
1109 DPRINTK(INFO, "doing ioctl for %s\n", netdev->name);
1110 switch (cmd) {
1111 case NETXEN_NIC_CMD:
1112 err = netxen_nic_do_ioctl(adapter, (void *)ifr->ifr_data, port);
1113 break;
1114
1115 case NETXEN_NIC_NAME:
1116 DPRINTK(INFO, "ioctl cmd for NetXen\n");
1117 if (ifr->ifr_data) {
1118 sprintf(dev_name, "%s-%d", NETXEN_NIC_NAME_RSP,
1119 port->portnum);
1120 nr_bytes = copy_to_user((char *)ifr->ifr_data, dev_name,
1121 NETXEN_NIC_NAME_LEN);
1122 if (nr_bytes)
1123 err = -EIO;
1124
1125 }
1126 break;
1127
1128 default:
1129 DPRINTK(INFO, "ioctl cmd %x not supported\n", cmd);
1130 err = -EOPNOTSUPP;
1131 break;
1132 }
1133
1134 return err;
1135 }
1136
1137 static struct pci_driver netxen_driver = {
1138 .name = netxen_nic_driver_name,
1139 .id_table = netxen_pci_tbl,
1140 .probe = netxen_nic_probe,
1141 .remove = __devexit_p(netxen_nic_remove)
1142 };
1143
1144 /* Driver Registration on NetXen card */
1145
1146 static int __init netxen_init_module(void)
1147 {
1148 return pci_module_init(&netxen_driver);
1149 }
1150
1151 module_init(netxen_init_module);
1152
1153 static void __exit netxen_exit_module(void)
1154 {
1155 /*
1156 * Wait for some time to allow the dma to drain, if any.
1157 */
1158 mdelay(5);
1159 pci_unregister_driver(&netxen_driver);
1160 }
1161
1162 module_exit(netxen_exit_module);
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