?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] NetXen: whitespace cleaup and more cleanup fixes
[linux-2.6/kmemtrace.git] / drivers / net / netxen / netxen_nic_main.c
blob6dbdc8be39498146a81feab42e3c2eb29ca59403
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 net_device *netdev);
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->cmd_buf_arr = cmd_buf_arr;
237 adapter->ahw.pci_base0 = mem_ptr0;
238 adapter->ahw.pci_base1 = mem_ptr1;
239 adapter->ahw.pci_base2 = mem_ptr2;
240 spin_lock_init(&adapter->tx_lock);
241 spin_lock_init(&adapter->lock);
242 #ifdef CONFIG_IA64
243 netxen_pinit_from_rom(adapter, 0);
244 udelay(500);
245 netxen_load_firmware(adapter);
246 #endif
247
248 /* initialize the buffers in adapter */
249 netxen_initialize_adapter_sw(adapter);
250 /*
251 * Set the CRB window to invalid. If any register in window 0 is
252 * accessed it should set the window to 0 and then reset it to 1.
253 */
254 adapter->curr_window = 255;
255 /*
256 * Adapter in our case is quad port so initialize it before
257 * initializing the ports
258 */
259 netxen_initialize_adapter_hw(adapter); /* initialize the adapter */
260
261 netxen_initialize_adapter_ops(adapter);
262
263 init_timer(&adapter->watchdog_timer);
264 adapter->ahw.xg_linkup = 0;
265 adapter->watchdog_timer.function = &netxen_watchdog;
266 adapter->watchdog_timer.data = (unsigned long)adapter;
267 INIT_WORK(&adapter->watchdog_task,
268 (void (*)(void *))netxen_watchdog_task, adapter);
269 adapter->ahw.pdev = pdev;
270 adapter->proc_cmd_buf_counter = 0;
271 pci_read_config_byte(pdev, PCI_REVISION_ID, &adapter->ahw.revision_id);
272
273 if (pci_enable_msi(pdev)) {
274 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
275 printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
276 " error\n", netxen_nic_driver_name);
277 } else
278 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
279
280 if (netxen_is_flash_supported(adapter) == 0 &&
281 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
282 valid_mac = 1;
283 else
284 valid_mac = 0;
285
286 /*
287 * Initialize all the CRB registers here.
288 */
289 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
290 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
291 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
292
293 /* Unlock the HW, prompting the boot sequence */
294 writel(1,
295 NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
296
297 /* Handshake with the card before we register the devices. */
298 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
299
300 /* initialize the all the ports */
301
302 for (i = 0; i < adapter->ahw.max_ports; i++) {
303 netdev = alloc_etherdev(sizeof(struct netxen_port));
304 if (!netdev) {
305 printk(KERN_ERR "%s: could not allocate netdev for port"
306 " %d\n", netxen_nic_driver_name, i + 1);
307 goto err_out_free_dev;
308 }
309
310 SET_MODULE_OWNER(netdev);
311 SET_NETDEV_DEV(netdev, &pdev->dev);
312
313 port = netdev_priv(netdev);
314 port->netdev = netdev;
315 port->pdev = pdev;
316 port->adapter = adapter;
317 port->portnum = i; /* Gigabit port number from 0-3 */
318
319 netdev->open = netxen_nic_open;
320 netdev->stop = netxen_nic_close;
321 netdev->hard_start_xmit = netxen_nic_xmit_frame;
322 netdev->get_stats = netxen_nic_get_stats;
323 netdev->set_multicast_list = netxen_nic_set_multi;
324 netdev->set_mac_address = netxen_nic_set_mac;
325 netdev->change_mtu = netxen_nic_change_mtu;
326 netdev->do_ioctl = netxen_nic_ioctl;
327 netdev->tx_timeout = netxen_tx_timeout;
328 netdev->watchdog_timeo = HZ;
329
330 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
331 netdev->poll = netxen_nic_poll;
332 netdev->weight = NETXEN_NETDEV_WEIGHT;
333 #ifdef CONFIG_NET_POLL_CONTROLLER
334 netdev->poll_controller = netxen_nic_poll_controller;
335 #endif
336 /* ScatterGather support */
337 netdev->features = NETIF_F_SG;
338 netdev->features |= NETIF_F_IP_CSUM;
339 netdev->features |= NETIF_F_TSO;
340
341 if (pci_using_dac)
342 netdev->features |= NETIF_F_HIGHDMA;
343
344 if (valid_mac) {
345 unsigned char *p = (unsigned char *)&mac_addr[i];
346 netdev->dev_addr[0] = *(p + 5);
347 netdev->dev_addr[1] = *(p + 4);
348 netdev->dev_addr[2] = *(p + 3);
349 netdev->dev_addr[3] = *(p + 2);
350 netdev->dev_addr[4] = *(p + 1);
351 netdev->dev_addr[5] = *(p + 0);
352
353 memcpy(netdev->perm_addr, netdev->dev_addr,
354 netdev->addr_len);
355 if (!is_valid_ether_addr(netdev->perm_addr)) {
356 printk(KERN_ERR "%s: Bad MAC address "
357 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
358 netxen_nic_driver_name,
359 netdev->dev_addr[0],
360 netdev->dev_addr[1],
361 netdev->dev_addr[2],
362 netdev->dev_addr[3],
363 netdev->dev_addr[4],
364 netdev->dev_addr[5]);
365 } else {
366 if (adapter->macaddr_set)
367 adapter->macaddr_set(port,
368 netdev->dev_addr);
369 }
370 }
371 INIT_WORK(&adapter->tx_timeout_task,
372 (void (*)(void *))netxen_tx_timeout_task, netdev);
373 netif_carrier_off(netdev);
374 netif_stop_queue(netdev);
375
376 if ((err = register_netdev(netdev))) {
377 printk(KERN_ERR "%s: register_netdev failed port #%d"
378 " aborting\n", netxen_nic_driver_name, i + 1);
379 err = -EIO;
380 free_netdev(netdev);
381 goto err_out_free_dev;
382 }
383 adapter->port_count++;
384 adapter->active_ports = 0;
385 adapter->port[i] = port;
386 }
387
388 /*
389 * delay a while to ensure that the Pegs are up & running.
390 * Otherwise, we might see some flaky behaviour.
391 */
392 udelay(100);
393
394 switch (adapter->ahw.board_type) {
395 case NETXEN_NIC_GBE:
396 printk("%s: QUAD GbE board initialized\n",
397 netxen_nic_driver_name);
398 break;
399
400 case NETXEN_NIC_XGBE:
401 printk("%s: XGbE board initialized\n", netxen_nic_driver_name);
402 break;
403 }
404
405 adapter->driver_mismatch = 0;
406
407 return 0;
408
409 err_out_free_dev:
410 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
411 pci_disable_msi(pdev);
412 for (i = 0; i < adapter->port_count; i++) {
413 port = adapter->port[i];
414 if ((port) && (port->netdev)) {
415 unregister_netdev(port->netdev);
416 free_netdev(port->netdev);
417 }
418 }
419
420 err_out_free_rx_buffer:
421 for (i = 0; i < MAX_RCV_CTX; ++i) {
422 recv_ctx = &adapter->recv_ctx[i];
423 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
424 rcv_desc = &recv_ctx->rcv_desc[ring];
425 if (rcv_desc->rx_buf_arr != NULL) {
426 vfree(rcv_desc->rx_buf_arr);
427 rcv_desc->rx_buf_arr = NULL;
428 }
429 }
430 }
431
432 vfree(cmd_buf_arr);
433
434 kfree(adapter->port);
435
436 err_out_free_adapter:
437 pci_set_drvdata(pdev, NULL);
438 kfree(adapter);
439
440 err_out_iounmap:
441 iounmap(mem_ptr0);
442 iounmap(mem_ptr1);
443 iounmap(mem_ptr2);
444
445 err_out_free_res:
446 pci_release_regions(pdev);
447 err_out_disable_pdev:
448 pci_disable_device(pdev);
449 return err;
450 }
451
452 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
453 {
454 struct netxen_adapter *adapter;
455 struct netxen_port *port;
456 struct netxen_rx_buffer *buffer;
457 struct netxen_recv_context *recv_ctx;
458 struct netxen_rcv_desc_ctx *rcv_desc;
459 int i;
460 int ctxid, ring;
461
462 adapter = pci_get_drvdata(pdev);
463 if (adapter == NULL)
464 return;
465
466 netxen_nic_stop_all_ports(adapter);
467 /* leave the hw in the same state as reboot */
468 netxen_pinit_from_rom(adapter, 0);
469 udelay(500);
470 netxen_load_firmware(adapter);
471
472 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
473 netxen_nic_disable_int(adapter);
474
475 udelay(500); /* Delay for a while to drain the DMA engines */
476 for (i = 0; i < adapter->port_count; i++) {
477 port = adapter->port[i];
478 if ((port) && (port->netdev)) {
479 unregister_netdev(port->netdev);
480 free_netdev(port->netdev);
481 }
482 }
483
484 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
485 pci_disable_msi(pdev);
486 pci_set_drvdata(pdev, NULL);
487 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
488 netxen_free_hw_resources(adapter);
489
490 iounmap(adapter->ahw.pci_base0);
491 iounmap(adapter->ahw.pci_base1);
492 iounmap(adapter->ahw.pci_base2);
493
494 pci_release_regions(pdev);
495 pci_disable_device(pdev);
496
497 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
498 recv_ctx = &adapter->recv_ctx[ctxid];
499 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
500 rcv_desc = &recv_ctx->rcv_desc[ring];
501 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
502 buffer = &(rcv_desc->rx_buf_arr[i]);
503 if (buffer->state == NETXEN_BUFFER_FREE)
504 continue;
505 pci_unmap_single(pdev, buffer->dma,
506 rcv_desc->dma_size,
507 PCI_DMA_FROMDEVICE);
508 if (buffer->skb != NULL)
509 dev_kfree_skb_any(buffer->skb);
510 }
511 vfree(rcv_desc->rx_buf_arr);
512 }
513 }
514
515 vfree(adapter->cmd_buf_arr);
516 kfree(adapter);
517 }
518
519 /*
520 * Called when a network interface is made active
521 * @returns 0 on success, negative value on failure
522 */
523 static int netxen_nic_open(struct net_device *netdev)
524 {
525 struct netxen_port *port = netdev_priv(netdev);
526 struct netxen_adapter *adapter = port->adapter;
527 int err = 0;
528 int ctx, ring;
529
530 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
531 err = netxen_init_firmware(adapter);
532 if (err != 0) {
533 printk(KERN_ERR "Failed to init firmware\n");
534 return -EIO;
535 }
536 netxen_nic_flash_print(adapter);
537
538 /* setup all the resources for the Phantom... */
539 /* this include the descriptors for rcv, tx, and status */
540 netxen_nic_clear_stats(adapter);
541 err = netxen_nic_hw_resources(adapter);
542 if (err) {
543 printk(KERN_ERR "Error in setting hw resources:%d\n",
544 err);
545 return err;
546 }
547 if (adapter->init_port
548 && adapter->init_port(adapter, port->portnum) != 0) {
549 printk(KERN_ERR "%s: Failed to initialize port %d\n",
550 netxen_nic_driver_name, port->portnum);
551 netxen_free_hw_resources(adapter);
552 return -EIO;
553 }
554 if (adapter->init_niu)
555 adapter->init_niu(adapter);
556 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
557 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
558 netxen_post_rx_buffers(adapter, ctx, ring);
559 }
560 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
561 }
562 adapter->active_ports++;
563 if (adapter->active_ports == 1) {
564 err = request_irq(adapter->ahw.pdev->irq, &netxen_intr,
565 SA_SHIRQ | SA_SAMPLE_RANDOM, netdev->name,
566 adapter);
567 if (err) {
568 printk(KERN_ERR "request_irq failed with: %d\n", err);
569 adapter->active_ports--;
570 return err;
571 }
572 adapter->irq = adapter->ahw.pdev->irq;
573 if (!adapter->driver_mismatch)
574 mod_timer(&adapter->watchdog_timer, jiffies);
575
576 netxen_nic_enable_int(adapter);
577 }
578
579 /* Done here again so that even if phantom sw overwrote it,
580 * we set it */
581 if (adapter->macaddr_set)
582 adapter->macaddr_set(port, netdev->dev_addr);
583 netxen_nic_set_link_parameters(port);
584
585 netxen_nic_set_multi(netdev);
586 if (!adapter->driver_mismatch)
587 netif_start_queue(netdev);
588
589 return 0;
590 }
591
592 /*
593 * netxen_nic_close - Disables a network interface entry point
594 */
595 static int netxen_nic_close(struct net_device *netdev)
596 {
597 struct netxen_port *port = netdev_priv(netdev);
598 struct netxen_adapter *adapter = port->adapter;
599 int i, j;
600 struct netxen_cmd_buffer *cmd_buff;
601 struct netxen_skb_frag *buffrag;
602
603 netif_carrier_off(netdev);
604 netif_stop_queue(netdev);
605
606 adapter->active_ports--;
607
608 if (!adapter->active_ports) {
609 netxen_nic_disable_int(adapter);
610 if (adapter->irq)
611 free_irq(adapter->irq, adapter);
612 cmd_buff = adapter->cmd_buf_arr;
613 for (i = 0; i < adapter->max_tx_desc_count; i++) {
614 buffrag = cmd_buff->frag_array;
615 if (buffrag->dma) {
616 pci_unmap_single(port->pdev, buffrag->dma,
617 buffrag->length,
618 PCI_DMA_TODEVICE);
619 buffrag->dma = (u64) NULL;
620 }
621 for (j = 0; j < cmd_buff->frag_count; j++) {
622 buffrag++;
623 if (buffrag->dma) {
624 pci_unmap_page(port->pdev,
625 buffrag->dma,
626 buffrag->length,
627 PCI_DMA_TODEVICE);
628 buffrag->dma = (u64) NULL;
629 }
630 }
631 /* Free the skb we received in netxen_nic_xmit_frame */
632 if (cmd_buff->skb) {
633 dev_kfree_skb_any(cmd_buff->skb);
634 cmd_buff->skb = NULL;
635 }
636 cmd_buff++;
637 }
638 del_timer_sync(&adapter->watchdog_timer);
639 }
640
641 return 0;
642 }
643
644 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
645 {
646 struct netxen_port *port = netdev_priv(netdev);
647 struct netxen_adapter *adapter = port->adapter;
648 struct netxen_hardware_context *hw = &adapter->ahw;
649 unsigned int first_seg_len = skb->len - skb->data_len;
650 struct netxen_skb_frag *buffrag;
651 unsigned int i;
652
653 u32 producer = 0;
654 u32 saved_producer = 0;
655 struct cmd_desc_type0 *hwdesc;
656 int k;
657 struct netxen_cmd_buffer *pbuf = NULL;
658 unsigned int tries = 0;
659 static int dropped_packet = 0;
660 int frag_count;
661 u32 local_producer = 0;
662 u32 max_tx_desc_count = 0;
663 u32 last_cmd_consumer = 0;
664 int no_of_desc;
665
666 port->stats.xmitcalled++;
667 frag_count = skb_shinfo(skb)->nr_frags + 1;
668
669 if (unlikely(skb->len <= 0)) {
670 dev_kfree_skb_any(skb);
671 port->stats.badskblen++;
672 return NETDEV_TX_OK;
673 }
674
675 if (frag_count > MAX_BUFFERS_PER_CMD) {
676 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
677 "too large, can handle only %d frags\n",
678 netxen_nic_driver_name, netdev->name,
679 frag_count, MAX_BUFFERS_PER_CMD);
680 port->stats.txdropped++;
681 if ((++dropped_packet & 0xff) == 0xff)
682 printk("%s: %s droppped packets = %d\n",
683 netxen_nic_driver_name, netdev->name,
684 dropped_packet);
685
686 return NETDEV_TX_OK;
687 }
688
689 /*
690 * Everything is set up. Now, we just need to transmit it out.
691 * Note that we have to copy the contents of buffer over to
692 * right place. Later on, this can be optimized out by de-coupling the
693 * producer index from the buffer index.
694 */
695 retry_getting_window:
696 spin_lock_bh(&adapter->tx_lock);
697 if (adapter->total_threads == MAX_XMIT_PRODUCERS) {
698 spin_unlock_bh(&adapter->tx_lock);
699 /*
700 * Yield CPU
701 */
702 if (!in_atomic())
703 schedule();
704 else {
705 for (i = 0; i < 20; i++)
706 cpu_relax(); /*This a nop instr on i386 */
707 }
708 goto retry_getting_window;
709 }
710 local_producer = adapter->cmd_producer;
711 /* There 4 fragments per descriptor */
712 no_of_desc = (frag_count + 3) >> 2;
713 if (netdev->features & NETIF_F_TSO) {
714 if (skb_shinfo(skb)->gso_size > 0) {
715
716 no_of_desc++;
717 if (((skb->nh.iph)->ihl * sizeof(u32)) +
718 ((skb->h.th)->doff * sizeof(u32)) +
719 sizeof(struct ethhdr) >
720 (sizeof(struct cmd_desc_type0) - NET_IP_ALIGN)) {
721 no_of_desc++;
722 }
723 }
724 }
725 k = adapter->cmd_producer;
726 max_tx_desc_count = adapter->max_tx_desc_count;
727 last_cmd_consumer = adapter->last_cmd_consumer;
728 if ((k + no_of_desc) >=
729 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
730 last_cmd_consumer)) {
731 spin_unlock_bh(&adapter->tx_lock);
732 if (tries == 0) {
733 local_bh_disable();
734 netxen_process_cmd_ring((unsigned long)adapter);
735 local_bh_enable();
736 ++tries;
737 goto retry_getting_window;
738 } else {
739 port->stats.nocmddescriptor++;
740 DPRINTK(ERR, "No command descriptors available,"
741 " producer = %d, consumer = %d count=%llu,"
742 " dropping packet\n", producer,
743 adapter->last_cmd_consumer,
744 port->stats.nocmddescriptor);
745
746 spin_lock_bh(&adapter->tx_lock);
747 netif_stop_queue(netdev);
748 port->flags |= NETXEN_NETDEV_STATUS;
749 spin_unlock_bh(&adapter->tx_lock);
750 return NETDEV_TX_BUSY;
751 }
752 }
753 k = get_index_range(k, max_tx_desc_count, no_of_desc);
754 adapter->cmd_producer = k;
755 adapter->total_threads++;
756 adapter->num_threads++;
757
758 spin_unlock_bh(&adapter->tx_lock);
759 /* Copy the descriptors into the hardware */
760 producer = local_producer;
761 saved_producer = producer;
762 hwdesc = &hw->cmd_desc_head[producer];
763 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
764 /* Take skb->data itself */
765 pbuf = &adapter->cmd_buf_arr[producer];
766 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
767 pbuf->mss = skb_shinfo(skb)->gso_size;
768 hwdesc->mss = skb_shinfo(skb)->gso_size;
769 } else {
770 pbuf->mss = 0;
771 hwdesc->mss = 0;
772 }
773 pbuf->no_of_descriptors = no_of_desc;
774 pbuf->total_length = skb->len;
775 pbuf->skb = skb;
776 pbuf->cmd = TX_ETHER_PKT;
777 pbuf->frag_count = frag_count;
778 pbuf->port = port->portnum;
779 buffrag = &pbuf->frag_array[0];
780 buffrag->dma = pci_map_single(port->pdev, skb->data, first_seg_len,
781 PCI_DMA_TODEVICE);
782 buffrag->length = first_seg_len;
783 CMD_DESC_TOTAL_LENGTH_WRT(hwdesc, skb->len);
784 hwdesc->num_of_buffers = frag_count;
785 hwdesc->opcode = TX_ETHER_PKT;
786
787 CMD_DESC_PORT_WRT(hwdesc, port->portnum);
788 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
789 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
790
791 for (i = 1, k = 1; i < frag_count; i++, k++) {
792 struct skb_frag_struct *frag;
793 int len, temp_len;
794 unsigned long offset;
795 dma_addr_t temp_dma;
796
797 /* move to next desc. if there is a need */
798 if ((i & 0x3) == 0) {
799 k = 0;
800 producer = get_next_index(producer,
801 adapter->max_tx_desc_count);
802 hwdesc = &hw->cmd_desc_head[producer];
803 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
804 }
805 frag = &skb_shinfo(skb)->frags[i - 1];
806 len = frag->size;
807 offset = frag->page_offset;
808
809 temp_len = len;
810 temp_dma = pci_map_page(port->pdev, frag->page, offset,
811 len, PCI_DMA_TODEVICE);
812
813 buffrag++;
814 buffrag->dma = temp_dma;
815 buffrag->length = temp_len;
816
817 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
818 switch (k) {
819 case 0:
820 hwdesc->buffer1_length = cpu_to_le16(temp_len);
821 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
822 break;
823 case 1:
824 hwdesc->buffer2_length = cpu_to_le16(temp_len);
825 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
826 break;
827 case 2:
828 hwdesc->buffer3_length = cpu_to_le16(temp_len);
829 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
830 break;
831 case 3:
832 hwdesc->buffer4_length = temp_len;
833 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
834 break;
835 }
836 frag++;
837 }
838 producer = get_next_index(producer, adapter->max_tx_desc_count);
839
840 /* might change opcode to TX_TCP_LSO */
841 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
842
843 /* For LSO, we need to copy the MAC/IP/TCP headers into
844 * the descriptor ring
845 */
846 if (hw->cmd_desc_head[saved_producer].opcode == TX_TCP_LSO) {
847 int hdr_len, first_hdr_len, more_hdr;
848 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
849 if (hdr_len > (sizeof(struct cmd_desc_type0) - NET_IP_ALIGN)) {
850 first_hdr_len =
851 sizeof(struct cmd_desc_type0) - NET_IP_ALIGN;
852 more_hdr = 1;
853 } else {
854 first_hdr_len = hdr_len;
855 more_hdr = 0;
856 }
857 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
858 hwdesc = &hw->cmd_desc_head[producer];
859
860 /* copy the first 64 bytes */
861 memcpy(((void *)hwdesc) + NET_IP_ALIGN,
862 (void *)(skb->data), first_hdr_len);
863 producer = get_next_index(producer, max_tx_desc_count);
864
865 if (more_hdr) {
866 hwdesc = &hw->cmd_desc_head[producer];
867 /* copy the next 64 bytes - should be enough except
868 * for pathological case
869 */
870 memcpy((void *)hwdesc, (void *)(skb->data) +
871 first_hdr_len, hdr_len - first_hdr_len);
872 producer = get_next_index(producer, max_tx_desc_count);
873 }
874 }
875 spin_lock_bh(&adapter->tx_lock);
876 port->stats.txbytes +=
877 CMD_DESC_TOTAL_LENGTH(&hw->cmd_desc_head[saved_producer]);
878 /* Code to update the adapter considering how many producer threads
879 are currently working */
880 if ((--adapter->num_threads) == 0) {
881 /* This is the last thread */
882 u32 crb_producer = adapter->cmd_producer;
883 writel(crb_producer,
884 NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
885 wmb();
886 adapter->total_threads = 0;
887 } else {
888 u32 crb_producer = 0;
889 crb_producer =
890 readl(NETXEN_CRB_NORMALIZE
891 (adapter, CRB_CMD_PRODUCER_OFFSET));
892 if (crb_producer == local_producer) {
893 crb_producer = get_index_range(crb_producer,
894 max_tx_desc_count,
895 no_of_desc);
896 writel(crb_producer,
897 NETXEN_CRB_NORMALIZE(adapter,
898 CRB_CMD_PRODUCER_OFFSET));
899 wmb();
900 }
901 }
902
903 port->stats.xmitfinished++;
904 spin_unlock_bh(&adapter->tx_lock);
905
906 netdev->trans_start = jiffies;
907
908 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
909
910 DPRINTK(INFO, "Done. Send\n");
911 return NETDEV_TX_OK;
912 }
913
914 static void netxen_watchdog(unsigned long v)
915 {
916 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
917 schedule_work(&adapter->watchdog_task);
918 }
919
920 static void netxen_tx_timeout(struct net_device *netdev)
921 {
922 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
923 struct netxen_adapter *adapter = port->adapter;
924
925 schedule_work(&adapter->tx_timeout_task);
926 }
927
928 static void netxen_tx_timeout_task(struct net_device *netdev)
929 {
930 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
931 unsigned long flags;
932
933 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
934 netxen_nic_driver_name, netdev->name);
935
936 spin_lock_irqsave(&port->adapter->lock, flags);
937 netxen_nic_close(netdev);
938 netxen_nic_open(netdev);
939 spin_unlock_irqrestore(&port->adapter->lock, flags);
940 netdev->trans_start = jiffies;
941 netif_wake_queue(netdev);
942 }
943
944 static int
945 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
946 {
947 u32 ret = 0;
948
949 DPRINTK(INFO, "Entered handle ISR\n");
950
951 adapter->stats.ints++;
952
953 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
954 int count = 0;
955 u32 mask;
956 netxen_nic_disable_int(adapter);
957 /* Window = 0 or 1 */
958 do {
959 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
960 ISR_INT_TARGET_STATUS));
961 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
962 } while (((mask & 0x80) != 0) && (++count < 32));
963 if ((mask & 0x80) != 0)
964 printk("Could not disable interrupt completely\n");
965
966 }
967 adapter->stats.hostints++;
968
969 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
970 if (netif_rx_schedule_prep(netdev)) {
971 /*
972 * Interrupts are already disabled.
973 */
974 __netif_rx_schedule(netdev);
975 } else {
976 static unsigned int intcount = 0;
977 if ((++intcount & 0xfff) == 0xfff)
978 printk(KERN_ERR
979 "%s: %s interrupt %d while in poll\n",
980 netxen_nic_driver_name, netdev->name,
981 intcount);
982 }
983 ret = 1;
984 }
985
986 if (ret == 0) {
987 netxen_nic_enable_int(adapter);
988 }
989
990 return ret;
991 }
992
993 /*
994 * netxen_intr - Interrupt Handler
995 * @irq: interrupt number
996 * data points to adapter stucture (which may be handling more than 1 port
997 */
998 irqreturn_t netxen_intr(int irq, void *data)
999 {
1000 struct netxen_adapter *adapter;
1001 struct netxen_port *port;
1002 struct net_device *netdev;
1003 int i;
1004
1005 if (unlikely(!irq)) {
1006 return IRQ_NONE; /* Not our interrupt */
1007 }
1008
1009 adapter = (struct netxen_adapter *)data;
1010 for (i = 0; i < adapter->ahw.max_ports; i++) {
1011 port = adapter->port[i];
1012 netdev = port->netdev;
1013
1014 /* process our status queue (for all 4 ports) */
1015 netxen_handle_int(adapter, netdev);
1016 }
1017
1018 return IRQ_HANDLED;
1019 }
1020
1021 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1022 {
1023 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
1024 struct netxen_adapter *adapter = port->adapter;
1025 int work_to_do = min(*budget, netdev->quota);
1026 int done = 1;
1027 int ctx;
1028 int this_work_done;
1029 int work_done = 0;
1030
1031 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1032 port->stats.polled++;
1033
1034 work_done = 0;
1035 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1036 /*
1037 * Fairness issue. This will give undue weight to the
1038 * receive context 0.
1039 */
1040
1041 /*
1042 * To avoid starvation, we give each of our receivers,
1043 * a fraction of the quota. Sometimes, it might happen that we
1044 * have enough quota to process every packet, but since all the
1045 * packets are on one context, it gets only half of the quota,
1046 * and ends up not processing it.
1047 */
1048 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1049 work_to_do /
1050 MAX_RCV_CTX);
1051 work_done += this_work_done;
1052 }
1053
1054 netdev->quota -= work_done;
1055 *budget -= work_done;
1056
1057 if (work_done >= work_to_do
1058 && netxen_nic_rx_has_work(adapter) != 0)
1059 done = 0;
1060
1061 netxen_process_cmd_ring((unsigned long)adapter);
1062
1063 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1064 work_done, work_to_do);
1065 if (done) {
1066 netif_rx_complete(netdev);
1067 netxen_nic_enable_int(adapter);
1068 }
1069
1070 return !done;
1071 }
1072
1073 #ifdef CONFIG_NET_POLL_CONTROLLER
1074 static void netxen_nic_poll_controller(struct net_device *netdev)
1075 {
1076 struct netxen_port *port = netdev_priv(netdev);
1077 struct netxen_adapter *adapter = port->adapter;
1078 disable_irq(adapter->irq);
1079 netxen_intr(adapter->irq, adapter);
1080 enable_irq(adapter->irq);
1081 }
1082 #endif
1083 /*
1084 * netxen_nic_ioctl () We provide the tcl/phanmon support through these
1085 * ioctls.
1086 */
1087 static int
1088 netxen_nic_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1089 {
1090 int err = 0;
1091 unsigned long nr_bytes = 0;
1092 struct netxen_port *port = netdev_priv(netdev);
1093 struct netxen_adapter *adapter = port->adapter;
1094 char dev_name[NETXEN_NIC_NAME_LEN];
1095
1096 DPRINTK(INFO, "doing ioctl for %s\n", netdev->name);
1097 switch (cmd) {
1098 case NETXEN_NIC_CMD:
1099 err = netxen_nic_do_ioctl(adapter, (void *)ifr->ifr_data, port);
1100 break;
1101
1102 case NETXEN_NIC_NAME:
1103 DPRINTK(INFO, "ioctl cmd for NetXen\n");
1104 if (ifr->ifr_data) {
1105 sprintf(dev_name, "%s-%d", NETXEN_NIC_NAME_RSP,
1106 port->portnum);
1107 nr_bytes = copy_to_user((char *)ifr->ifr_data, dev_name,
1108 NETXEN_NIC_NAME_LEN);
1109 if (nr_bytes)
1110 err = -EIO;
1111
1112 }
1113 break;
1114
1115 default:
1116 DPRINTK(INFO, "ioctl cmd %x not supported\n", cmd);
1117 err = -EOPNOTSUPP;
1118 break;
1119 }
1120
1121 return err;
1122 }
1123
1124 static struct pci_driver netxen_driver = {
1125 .name = netxen_nic_driver_name,
1126 .id_table = netxen_pci_tbl,
1127 .probe = netxen_nic_probe,
1128 .remove = __devexit_p(netxen_nic_remove)
1129 };
1130
1131 /* Driver Registration on NetXen card */
1132
1133 static int __init netxen_init_module(void)
1134 {
1135 return pci_module_init(&netxen_driver);
1136 }
1137
1138 module_init(netxen_init_module);
1139
1140 static void __exit netxen_exit_module(void)
1141 {
1142 /*
1143 * Wait for some time to allow the dma to drain, if any.
1144 */
1145 mdelay(5);
1146 pci_unregister_driver(&netxen_driver);
1147 }
1148
1149 module_exit(netxen_exit_module);
kmemtrace - Kernel memory tracer