?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
NetXen: work queue fixes.
[linux-2.6-xlnx.git] / drivers / net / netxen / netxen_nic_main.c
blobbc08d21adc47ce70248f5019b73a7e669b889a31
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 #define DEFINE_GLOBAL_RECV_CRB
40 #include "netxen_nic_phan_reg.h"
41 #include "netxen_nic_ioctl.h"
42
43 #include <linux/dma-mapping.h>
44 #include <linux/vmalloc.h>
45
46 #define PHAN_VENDOR_ID 0x4040
47
48 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
49 MODULE_LICENSE("GPL");
50 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
51
52 char netxen_nic_driver_name[] = "netxen-nic";
53 static char netxen_nic_driver_string[] = "NetXen Network Driver version "
54 NETXEN_NIC_LINUX_VERSIONID;
55
56 #define NETXEN_NETDEV_WEIGHT 120
57 #define NETXEN_ADAPTER_UP_MAGIC 777
58 #define NETXEN_NIC_PEG_TUNE 0
59
60 u8 nx_p2_id = NX_P2_C0;
61
62 #define DMA_32BIT_MASK 0x00000000ffffffffULL
63 #define DMA_35BIT_MASK 0x00000007ffffffffULL
64
65 /* Local functions to NetXen NIC driver */
66 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
67 const struct pci_device_id *ent);
68 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
69 static int netxen_nic_open(struct net_device *netdev);
70 static int netxen_nic_close(struct net_device *netdev);
71 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
72 static void netxen_tx_timeout(struct net_device *netdev);
73 static void netxen_tx_timeout_task(struct work_struct *work);
74 static void netxen_watchdog(unsigned long);
75 static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
76 static int netxen_nic_ioctl(struct net_device *netdev,
77 struct ifreq *ifr, int cmd);
78 static int netxen_nic_poll(struct net_device *dev, int *budget);
79 #ifdef CONFIG_NET_POLL_CONTROLLER
80 static void netxen_nic_poll_controller(struct net_device *netdev);
81 #endif
82 static irqreturn_t netxen_intr(int irq, void *data);
83
84 /* PCI Device ID Table */
85 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
86 {PCI_DEVICE(0x4040, 0x0001)},
87 {PCI_DEVICE(0x4040, 0x0002)},
88 {PCI_DEVICE(0x4040, 0x0003)},
89 {PCI_DEVICE(0x4040, 0x0004)},
90 {PCI_DEVICE(0x4040, 0x0005)},
91 {PCI_DEVICE(0x4040, 0x0024)},
92 {PCI_DEVICE(0x4040, 0x0025)},
93 {0,}
94 };
95
96 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
97
98 struct workqueue_struct *netxen_workq;
99 static void netxen_watchdog(unsigned long);
100
101 /*
102 * netxen_nic_probe()
103 *
104 * The Linux system will invoke this after identifying the vendor ID and
105 * device Id in the pci_tbl supported by this module.
106 *
107 * A quad port card has one operational PCI config space, (function 0),
108 * which is used to access all four ports.
109 *
110 * This routine will initialize the adapter, and setup the global parameters
111 * along with the port's specific structure.
112 */
113 static int __devinit
114 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
115 {
116 struct net_device *netdev = NULL;
117 struct netxen_adapter *adapter = NULL;
118 struct netxen_port *port = NULL;
119 void __iomem *mem_ptr0 = NULL;
120 void __iomem *mem_ptr1 = NULL;
121 void __iomem *mem_ptr2 = NULL;
122
123 u8 *db_ptr = NULL;
124 unsigned long mem_base, mem_len, db_base, db_len;
125 int pci_using_dac, i, err;
126 int ring;
127 struct netxen_recv_context *recv_ctx = NULL;
128 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
129 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
130 u64 mac_addr[FLASH_NUM_PORTS + 1];
131 int valid_mac = 0;
132
133 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
134 /* In current scheme, we use only PCI function 0 */
135 if (PCI_FUNC(pdev->devfn) != 0) {
136 DPRINTK(ERR, "NetXen function %d will not be enabled.\n",
137 PCI_FUNC(pdev->devfn));
138 return -ENODEV;
139 }
140 if ((err = pci_enable_device(pdev)))
141 return err;
142 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
143 err = -ENODEV;
144 goto err_out_disable_pdev;
145 }
146
147 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
148 goto err_out_disable_pdev;
149
150 pci_set_master(pdev);
151 pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id);
152 if (nx_p2_id == NX_P2_C1 &&
153 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
154 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
155 pci_using_dac = 1;
156 } else {
157 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
158 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
159 goto err_out_free_res;
160
161 pci_using_dac = 0;
162 }
163
164 /* remap phys address */
165 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
166 mem_len = pci_resource_len(pdev, 0);
167
168 /* 128 Meg of memory */
169 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
170 mem_ptr1 =
171 ioremap(mem_base + SECOND_PAGE_GROUP_START, SECOND_PAGE_GROUP_SIZE);
172 mem_ptr2 =
173 ioremap(mem_base + THIRD_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
174
175 if ((mem_ptr0 == 0UL) || (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
176 DPRINTK(ERR,
177 "Cannot remap adapter memory aborting.:"
178 "0 -> %p, 1 -> %p, 2 -> %p\n",
179 mem_ptr0, mem_ptr1, mem_ptr2);
180
181 err = -EIO;
182 goto err_out_iounmap;
183 }
184 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
185 db_len = pci_resource_len(pdev, 4);
186
187 if (db_len == 0) {
188 printk(KERN_ERR "%s: doorbell is disabled\n",
189 netxen_nic_driver_name);
190 err = -EIO;
191 goto err_out_iounmap;
192 }
193 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
194 db_len);
195
196 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
197 if (db_ptr == 0UL) {
198 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
199 netxen_nic_driver_name);
200 err = -EIO;
201 goto err_out_iounmap;
202 }
203 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
204
205 /*
206 * Allocate a adapter structure which will manage all the initialization
207 * as well as the common resources for all ports...
208 * all the ports will have pointer to this adapter as well as Adapter
209 * will have pointers of all the ports structures.
210 */
211
212 /* One adapter structure for all 4 ports.... */
213 adapter = kzalloc(sizeof(struct netxen_adapter), GFP_KERNEL);
214 if (adapter == NULL) {
215 printk(KERN_ERR "%s: Could not allocate adapter memory:%d\n",
216 netxen_nic_driver_name,
217 (int)sizeof(struct netxen_adapter));
218 err = -ENOMEM;
219 goto err_out_dbunmap;
220 }
221
222 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS;
223 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
224 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
225 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
226
227 pci_set_drvdata(pdev, adapter);
228
229 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
230 if (cmd_buf_arr == NULL) {
231 printk(KERN_ERR
232 "%s: Could not allocate cmd_buf_arr memory:%d\n",
233 netxen_nic_driver_name, (int)TX_RINGSIZE);
234 err = -ENOMEM;
235 goto err_out_free_adapter;
236 }
237 memset(cmd_buf_arr, 0, TX_RINGSIZE);
238
239 for (i = 0; i < MAX_RCV_CTX; ++i) {
240 recv_ctx = &adapter->recv_ctx[i];
241 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
242 rcv_desc = &recv_ctx->rcv_desc[ring];
243 switch (RCV_DESC_TYPE(ring)) {
244 case RCV_DESC_NORMAL:
245 rcv_desc->max_rx_desc_count =
246 adapter->max_rx_desc_count;
247 rcv_desc->flags = RCV_DESC_NORMAL;
248 rcv_desc->dma_size = RX_DMA_MAP_LEN;
249 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
250 break;
251
252 case RCV_DESC_JUMBO:
253 rcv_desc->max_rx_desc_count =
254 adapter->max_jumbo_rx_desc_count;
255 rcv_desc->flags = RCV_DESC_JUMBO;
256 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
257 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
258 break;
259
260 case RCV_RING_LRO:
261 rcv_desc->max_rx_desc_count =
262 adapter->max_lro_rx_desc_count;
263 rcv_desc->flags = RCV_DESC_LRO;
264 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
265 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
266 break;
267
268 }
269 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
270 vmalloc(RCV_BUFFSIZE);
271
272 if (rcv_desc->rx_buf_arr == NULL) {
273 printk(KERN_ERR "%s: Could not allocate"
274 "rcv_desc->rx_buf_arr memory:%d\n",
275 netxen_nic_driver_name,
276 (int)RCV_BUFFSIZE);
277 err = -ENOMEM;
278 goto err_out_free_rx_buffer;
279 }
280 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
281 }
282
283 }
284
285 adapter->cmd_buf_arr = cmd_buf_arr;
286 adapter->ahw.pci_base0 = mem_ptr0;
287 adapter->ahw.pci_base1 = mem_ptr1;
288 adapter->ahw.pci_base2 = mem_ptr2;
289 adapter->ahw.db_base = db_ptr;
290 adapter->ahw.db_len = db_len;
291 spin_lock_init(&adapter->tx_lock);
292 spin_lock_init(&adapter->lock);
293 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
294 #ifdef CONFIG_IA64
295 netxen_pinit_from_rom(adapter, 0);
296 udelay(500);
297 netxen_load_firmware(adapter);
298 #endif
299
300 /*
301 * Set the CRB window to invalid. If any register in window 0 is
302 * accessed it should set the window to 0 and then reset it to 1.
303 */
304 adapter->curr_window = 255;
305 /*
306 * Adapter in our case is quad port so initialize it before
307 * initializing the ports
308 */
309 netxen_initialize_adapter_hw(adapter); /* initialize the adapter */
310
311 netxen_initialize_adapter_ops(adapter);
312
313 init_timer(&adapter->watchdog_timer);
314 adapter->ahw.xg_linkup = 0;
315 adapter->watchdog_timer.function = &netxen_watchdog;
316 adapter->watchdog_timer.data = (unsigned long)adapter;
317 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
318 adapter->ahw.pdev = pdev;
319 adapter->proc_cmd_buf_counter = 0;
320 adapter->ahw.revision_id = nx_p2_id;
321
322 if (pci_enable_msi(pdev)) {
323 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
324 printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
325 " error\n", netxen_nic_driver_name);
326 } else
327 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
328
329 if (netxen_is_flash_supported(adapter) == 0 &&
330 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
331 valid_mac = 1;
332 else
333 valid_mac = 0;
334
335 /*
336 * Initialize all the CRB registers here.
337 */
338 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
339 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
340 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
341
342 /* do this before waking up pegs so that we have valid dummy dma addr */
343 err = netxen_initialize_adapter_offload(adapter);
344 if (err) {
345 goto err_out_free_dev;
346 }
347
348 /* Unlock the HW, prompting the boot sequence */
349 writel(1,
350 NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
351
352 /* Handshake with the card before we register the devices. */
353 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
354
355 /* initialize the all the ports */
356 adapter->active_ports = 0;
357
358 for (i = 0; i < adapter->ahw.max_ports; i++) {
359 netdev = alloc_etherdev(sizeof(struct netxen_port));
360 if (!netdev) {
361 printk(KERN_ERR "%s: could not allocate netdev for port"
362 " %d\n", netxen_nic_driver_name, i + 1);
363 goto err_out_free_dev;
364 }
365
366 SET_MODULE_OWNER(netdev);
367 SET_NETDEV_DEV(netdev, &pdev->dev);
368
369 port = netdev_priv(netdev);
370 port->netdev = netdev;
371 port->pdev = pdev;
372 port->adapter = adapter;
373 port->portnum = i; /* Gigabit port number from 0-3 */
374
375 netdev->open = netxen_nic_open;
376 netdev->stop = netxen_nic_close;
377 netdev->hard_start_xmit = netxen_nic_xmit_frame;
378 netdev->get_stats = netxen_nic_get_stats;
379 netdev->set_multicast_list = netxen_nic_set_multi;
380 netdev->set_mac_address = netxen_nic_set_mac;
381 netdev->change_mtu = netxen_nic_change_mtu;
382 netdev->do_ioctl = netxen_nic_ioctl;
383 netdev->tx_timeout = netxen_tx_timeout;
384 netdev->watchdog_timeo = HZ;
385
386 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
387 netdev->poll = netxen_nic_poll;
388 netdev->weight = NETXEN_NETDEV_WEIGHT;
389 #ifdef CONFIG_NET_POLL_CONTROLLER
390 netdev->poll_controller = netxen_nic_poll_controller;
391 #endif
392 /* ScatterGather support */
393 netdev->features = NETIF_F_SG;
394 netdev->features |= NETIF_F_IP_CSUM;
395 netdev->features |= NETIF_F_TSO;
396
397 if (pci_using_dac)
398 netdev->features |= NETIF_F_HIGHDMA;
399
400 if (valid_mac) {
401 unsigned char *p = (unsigned char *)&mac_addr[i];
402 netdev->dev_addr[0] = *(p + 5);
403 netdev->dev_addr[1] = *(p + 4);
404 netdev->dev_addr[2] = *(p + 3);
405 netdev->dev_addr[3] = *(p + 2);
406 netdev->dev_addr[4] = *(p + 1);
407 netdev->dev_addr[5] = *(p + 0);
408
409 memcpy(netdev->perm_addr, netdev->dev_addr,
410 netdev->addr_len);
411 if (!is_valid_ether_addr(netdev->perm_addr)) {
412 printk(KERN_ERR "%s: Bad MAC address "
413 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
414 netxen_nic_driver_name,
415 netdev->dev_addr[0],
416 netdev->dev_addr[1],
417 netdev->dev_addr[2],
418 netdev->dev_addr[3],
419 netdev->dev_addr[4],
420 netdev->dev_addr[5]);
421 } else {
422 if (adapter->macaddr_set)
423 adapter->macaddr_set(port,
424 netdev->dev_addr);
425 }
426 }
427 INIT_WORK(&port->tx_timeout_task, netxen_tx_timeout_task);
428 netif_carrier_off(netdev);
429 netif_stop_queue(netdev);
430
431 if ((err = register_netdev(netdev))) {
432 printk(KERN_ERR "%s: register_netdev failed port #%d"
433 " aborting\n", netxen_nic_driver_name, i + 1);
434 err = -EIO;
435 free_netdev(netdev);
436 goto err_out_free_dev;
437 }
438 adapter->port_count++;
439 adapter->port[i] = port;
440 }
441
442 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
443 netxen_pinit_from_rom(adapter, 0);
444 udelay(500);
445 netxen_load_firmware(adapter);
446 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
447 /*
448 * delay a while to ensure that the Pegs are up & running.
449 * Otherwise, we might see some flaky behaviour.
450 */
451 udelay(100);
452
453 switch (adapter->ahw.board_type) {
454 case NETXEN_NIC_GBE:
455 printk("%s: QUAD GbE board initialized\n",
456 netxen_nic_driver_name);
457 break;
458
459 case NETXEN_NIC_XGBE:
460 printk("%s: XGbE board initialized\n", netxen_nic_driver_name);
461 break;
462 }
463
464 adapter->driver_mismatch = 0;
465
466 return 0;
467
468 err_out_free_dev:
469 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
470 pci_disable_msi(pdev);
471 for (i = 0; i < adapter->port_count; i++) {
472 port = adapter->port[i];
473 if ((port) && (port->netdev)) {
474 unregister_netdev(port->netdev);
475 free_netdev(port->netdev);
476 }
477 }
478
479 netxen_free_adapter_offload(adapter);
480
481 err_out_free_rx_buffer:
482 for (i = 0; i < MAX_RCV_CTX; ++i) {
483 recv_ctx = &adapter->recv_ctx[i];
484 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
485 rcv_desc = &recv_ctx->rcv_desc[ring];
486 if (rcv_desc->rx_buf_arr != NULL) {
487 vfree(rcv_desc->rx_buf_arr);
488 rcv_desc->rx_buf_arr = NULL;
489 }
490 }
491 }
492 vfree(cmd_buf_arr);
493
494 err_out_free_adapter:
495 pci_set_drvdata(pdev, NULL);
496 kfree(adapter);
497
498 err_out_dbunmap:
499 if (db_ptr)
500 iounmap(db_ptr);
501
502 err_out_iounmap:
503 if (mem_ptr0)
504 iounmap(mem_ptr0);
505 if (mem_ptr1)
506 iounmap(mem_ptr1);
507 if (mem_ptr2)
508 iounmap(mem_ptr2);
509
510 err_out_free_res:
511 pci_release_regions(pdev);
512 err_out_disable_pdev:
513 pci_disable_device(pdev);
514 return err;
515 }
516
517 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
518 {
519 struct netxen_adapter *adapter;
520 struct netxen_port *port;
521 struct netxen_rx_buffer *buffer;
522 struct netxen_recv_context *recv_ctx;
523 struct netxen_rcv_desc_ctx *rcv_desc;
524 int i;
525 int ctxid, ring;
526
527 adapter = pci_get_drvdata(pdev);
528 if (adapter == NULL)
529 return;
530
531 netxen_nic_stop_all_ports(adapter);
532 /* leave the hw in the same state as reboot */
533 netxen_pinit_from_rom(adapter, 0);
534 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
535 netxen_load_firmware(adapter);
536 netxen_free_adapter_offload(adapter);
537
538 udelay(500); /* Delay for a while to drain the DMA engines */
539 for (i = 0; i < adapter->port_count; i++) {
540 port = adapter->port[i];
541 if ((port) && (port->netdev)) {
542 unregister_netdev(port->netdev);
543 free_netdev(port->netdev);
544 }
545 }
546
547 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
548 pci_disable_msi(pdev);
549 pci_set_drvdata(pdev, NULL);
550 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
551 netxen_free_hw_resources(adapter);
552
553 iounmap(adapter->ahw.db_base);
554 iounmap(adapter->ahw.pci_base0);
555 iounmap(adapter->ahw.pci_base1);
556 iounmap(adapter->ahw.pci_base2);
557
558 pci_release_regions(pdev);
559 pci_disable_device(pdev);
560
561 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
562 recv_ctx = &adapter->recv_ctx[ctxid];
563 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
564 rcv_desc = &recv_ctx->rcv_desc[ring];
565 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
566 buffer = &(rcv_desc->rx_buf_arr[i]);
567 if (buffer->state == NETXEN_BUFFER_FREE)
568 continue;
569 pci_unmap_single(pdev, buffer->dma,
570 rcv_desc->dma_size,
571 PCI_DMA_FROMDEVICE);
572 if (buffer->skb != NULL)
573 dev_kfree_skb_any(buffer->skb);
574 }
575 vfree(rcv_desc->rx_buf_arr);
576 }
577 }
578
579 vfree(adapter->cmd_buf_arr);
580 kfree(adapter);
581 }
582
583 /*
584 * Called when a network interface is made active
585 * @returns 0 on success, negative value on failure
586 */
587 static int netxen_nic_open(struct net_device *netdev)
588 {
589 struct netxen_port *port = netdev_priv(netdev);
590 struct netxen_adapter *adapter = port->adapter;
591 int err = 0;
592 int ctx, ring;
593
594 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
595 err = netxen_init_firmware(adapter);
596 if (err != 0) {
597 printk(KERN_ERR "Failed to init firmware\n");
598 return -EIO;
599 }
600 netxen_nic_flash_print(adapter);
601 if (adapter->init_niu)
602 adapter->init_niu(adapter);
603
604 /* setup all the resources for the Phantom... */
605 /* this include the descriptors for rcv, tx, and status */
606 netxen_nic_clear_stats(adapter);
607 err = netxen_nic_hw_resources(adapter);
608 if (err) {
609 printk(KERN_ERR "Error in setting hw resources:%d\n",
610 err);
611 return err;
612 }
613 if (adapter->init_port
614 && adapter->init_port(adapter, port->portnum) != 0) {
615 printk(KERN_ERR "%s: Failed to initialize port %d\n",
616 netxen_nic_driver_name, port->portnum);
617 netxen_free_hw_resources(adapter);
618 return -EIO;
619 }
620 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
621 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
622 netxen_post_rx_buffers(adapter, ctx, ring);
623 }
624 adapter->irq = adapter->ahw.pdev->irq;
625 err = request_irq(adapter->ahw.pdev->irq, &netxen_intr,
626 SA_SHIRQ | SA_SAMPLE_RANDOM, netdev->name,
627 adapter);
628 if (err) {
629 printk(KERN_ERR "request_irq failed with: %d\n", err);
630 netxen_free_hw_resources(adapter);
631 return err;
632 }
633
634 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
635 }
636 adapter->active_ports++;
637 if (adapter->active_ports == 1) {
638 if (!adapter->driver_mismatch)
639 mod_timer(&adapter->watchdog_timer, jiffies);
640
641 netxen_nic_enable_int(adapter);
642 }
643
644 /* Done here again so that even if phantom sw overwrote it,
645 * we set it */
646 if (adapter->macaddr_set)
647 adapter->macaddr_set(port, netdev->dev_addr);
648 netxen_nic_set_link_parameters(port);
649
650 netxen_nic_set_multi(netdev);
651 if (adapter->set_mtu)
652 adapter->set_mtu(port, netdev->mtu);
653
654 if (!adapter->driver_mismatch)
655 netif_start_queue(netdev);
656
657 return 0;
658 }
659
660 /*
661 * netxen_nic_close - Disables a network interface entry point
662 */
663 static int netxen_nic_close(struct net_device *netdev)
664 {
665 struct netxen_port *port = netdev_priv(netdev);
666 struct netxen_adapter *adapter = port->adapter;
667 int i, j;
668 struct netxen_cmd_buffer *cmd_buff;
669 struct netxen_skb_frag *buffrag;
670
671 netif_carrier_off(netdev);
672 netif_stop_queue(netdev);
673
674 adapter->active_ports--;
675
676 if (!adapter->active_ports) {
677 netxen_nic_disable_int(adapter);
678 if (adapter->irq)
679 free_irq(adapter->irq, adapter);
680 cmd_buff = adapter->cmd_buf_arr;
681 for (i = 0; i < adapter->max_tx_desc_count; i++) {
682 buffrag = cmd_buff->frag_array;
683 if (buffrag->dma) {
684 pci_unmap_single(port->pdev, buffrag->dma,
685 buffrag->length,
686 PCI_DMA_TODEVICE);
687 buffrag->dma = (u64) NULL;
688 }
689 for (j = 0; j < cmd_buff->frag_count; j++) {
690 buffrag++;
691 if (buffrag->dma) {
692 pci_unmap_page(port->pdev,
693 buffrag->dma,
694 buffrag->length,
695 PCI_DMA_TODEVICE);
696 buffrag->dma = (u64) NULL;
697 }
698 }
699 /* Free the skb we received in netxen_nic_xmit_frame */
700 if (cmd_buff->skb) {
701 dev_kfree_skb_any(cmd_buff->skb);
702 cmd_buff->skb = NULL;
703 }
704 cmd_buff++;
705 }
706 FLUSH_SCHEDULED_WORK();
707 del_timer_sync(&adapter->watchdog_timer);
708 }
709
710 return 0;
711 }
712
713 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
714 {
715 struct netxen_port *port = netdev_priv(netdev);
716 struct netxen_adapter *adapter = port->adapter;
717 struct netxen_hardware_context *hw = &adapter->ahw;
718 unsigned int first_seg_len = skb->len - skb->data_len;
719 struct netxen_skb_frag *buffrag;
720 unsigned int i;
721
722 u32 producer = 0;
723 u32 saved_producer = 0;
724 struct cmd_desc_type0 *hwdesc;
725 int k;
726 struct netxen_cmd_buffer *pbuf = NULL;
727 static int dropped_packet = 0;
728 int frag_count;
729 u32 local_producer = 0;
730 u32 max_tx_desc_count = 0;
731 u32 last_cmd_consumer = 0;
732 int no_of_desc;
733
734 port->stats.xmitcalled++;
735 frag_count = skb_shinfo(skb)->nr_frags + 1;
736
737 if (unlikely(skb->len <= 0)) {
738 dev_kfree_skb_any(skb);
739 port->stats.badskblen++;
740 return NETDEV_TX_OK;
741 }
742
743 if (frag_count > MAX_BUFFERS_PER_CMD) {
744 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
745 "too large, can handle only %d frags\n",
746 netxen_nic_driver_name, netdev->name,
747 frag_count, MAX_BUFFERS_PER_CMD);
748 port->stats.txdropped++;
749 if ((++dropped_packet & 0xff) == 0xff)
750 printk("%s: %s droppped packets = %d\n",
751 netxen_nic_driver_name, netdev->name,
752 dropped_packet);
753
754 return NETDEV_TX_OK;
755 }
756
757 /*
758 * Everything is set up. Now, we just need to transmit it out.
759 * Note that we have to copy the contents of buffer over to
760 * right place. Later on, this can be optimized out by de-coupling the
761 * producer index from the buffer index.
762 */
763 retry_getting_window:
764 spin_lock_bh(&adapter->tx_lock);
765 if (adapter->total_threads == MAX_XMIT_PRODUCERS) {
766 spin_unlock_bh(&adapter->tx_lock);
767 /*
768 * Yield CPU
769 */
770 if (!in_atomic())
771 schedule();
772 else {
773 for (i = 0; i < 20; i++)
774 cpu_relax(); /*This a nop instr on i386 */
775 }
776 goto retry_getting_window;
777 }
778 local_producer = adapter->cmd_producer;
779 /* There 4 fragments per descriptor */
780 no_of_desc = (frag_count + 3) >> 2;
781 if (netdev->features & NETIF_F_TSO) {
782 if (skb_shinfo(skb)->gso_size > 0) {
783
784 no_of_desc++;
785 if (((skb->nh.iph)->ihl * sizeof(u32)) +
786 ((skb->h.th)->doff * sizeof(u32)) +
787 sizeof(struct ethhdr) >
788 (sizeof(struct cmd_desc_type0) - 2)) {
789 no_of_desc++;
790 }
791 }
792 }
793 k = adapter->cmd_producer;
794 max_tx_desc_count = adapter->max_tx_desc_count;
795 last_cmd_consumer = adapter->last_cmd_consumer;
796 if ((k + no_of_desc) >=
797 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
798 last_cmd_consumer)) {
799 port->stats.nocmddescriptor++;
800 DPRINTK(ERR, "No command descriptors available,"
801 " producer = %d, consumer = %d count=%llu,"
802 " dropping packet\n", producer,
803 adapter->last_cmd_consumer,
804 port->stats.nocmddescriptor);
805
806 netif_stop_queue(netdev);
807 port->flags |= NETXEN_NETDEV_STATUS;
808 spin_unlock_bh(&adapter->tx_lock);
809 return NETDEV_TX_BUSY;
810 }
811 k = get_index_range(k, max_tx_desc_count, no_of_desc);
812 adapter->cmd_producer = k;
813 adapter->total_threads++;
814 adapter->num_threads++;
815
816 spin_unlock_bh(&adapter->tx_lock);
817 /* Copy the descriptors into the hardware */
818 producer = local_producer;
819 saved_producer = producer;
820 hwdesc = &hw->cmd_desc_head[producer];
821 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
822 /* Take skb->data itself */
823 pbuf = &adapter->cmd_buf_arr[producer];
824 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
825 pbuf->mss = skb_shinfo(skb)->gso_size;
826 hwdesc->mss = skb_shinfo(skb)->gso_size;
827 } else {
828 pbuf->mss = 0;
829 hwdesc->mss = 0;
830 }
831 pbuf->total_length = skb->len;
832 pbuf->skb = skb;
833 pbuf->cmd = TX_ETHER_PKT;
834 pbuf->frag_count = frag_count;
835 pbuf->port = port->portnum;
836 buffrag = &pbuf->frag_array[0];
837 buffrag->dma = pci_map_single(port->pdev, skb->data, first_seg_len,
838 PCI_DMA_TODEVICE);
839 buffrag->length = first_seg_len;
840 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
841 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
842 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
843
844 netxen_set_cmd_desc_port(hwdesc, port->portnum);
845 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
846 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
847
848 for (i = 1, k = 1; i < frag_count; i++, k++) {
849 struct skb_frag_struct *frag;
850 int len, temp_len;
851 unsigned long offset;
852 dma_addr_t temp_dma;
853
854 /* move to next desc. if there is a need */
855 if ((i & 0x3) == 0) {
856 k = 0;
857 producer = get_next_index(producer,
858 adapter->max_tx_desc_count);
859 hwdesc = &hw->cmd_desc_head[producer];
860 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
861 }
862 frag = &skb_shinfo(skb)->frags[i - 1];
863 len = frag->size;
864 offset = frag->page_offset;
865
866 temp_len = len;
867 temp_dma = pci_map_page(port->pdev, frag->page, offset,
868 len, PCI_DMA_TODEVICE);
869
870 buffrag++;
871 buffrag->dma = temp_dma;
872 buffrag->length = temp_len;
873
874 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
875 switch (k) {
876 case 0:
877 hwdesc->buffer1_length = cpu_to_le16(temp_len);
878 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
879 break;
880 case 1:
881 hwdesc->buffer2_length = cpu_to_le16(temp_len);
882 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
883 break;
884 case 2:
885 hwdesc->buffer3_length = cpu_to_le16(temp_len);
886 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
887 break;
888 case 3:
889 hwdesc->buffer4_length = temp_len;
890 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
891 break;
892 }
893 frag++;
894 }
895 producer = get_next_index(producer, adapter->max_tx_desc_count);
896
897 /* might change opcode to TX_TCP_LSO */
898 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
899
900 /* For LSO, we need to copy the MAC/IP/TCP headers into
901 * the descriptor ring
902 */
903 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
904 == TX_TCP_LSO) {
905 int hdr_len, first_hdr_len, more_hdr;
906 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
907 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
908 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
909 more_hdr = 1;
910 } else {
911 first_hdr_len = hdr_len;
912 more_hdr = 0;
913 }
914 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
915 hwdesc = &hw->cmd_desc_head[producer];
916
917 /* copy the first 64 bytes */
918 memcpy(((void *)hwdesc) + 2,
919 (void *)(skb->data), first_hdr_len);
920 producer = get_next_index(producer, max_tx_desc_count);
921
922 if (more_hdr) {
923 hwdesc = &hw->cmd_desc_head[producer];
924 /* copy the next 64 bytes - should be enough except
925 * for pathological case
926 */
927 memcpy((void *)hwdesc, (void *)(skb->data) +
928 first_hdr_len, hdr_len - first_hdr_len);
929 producer = get_next_index(producer, max_tx_desc_count);
930 }
931 }
932 spin_lock_bh(&adapter->tx_lock);
933 port->stats.txbytes +=
934 netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
935 /* Code to update the adapter considering how many producer threads
936 are currently working */
937 if ((--adapter->num_threads) == 0) {
938 /* This is the last thread */
939 u32 crb_producer = adapter->cmd_producer;
940 writel(crb_producer,
941 NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
942 wmb();
943 adapter->total_threads = 0;
944 }
945
946 port->stats.xmitfinished++;
947 spin_unlock_bh(&adapter->tx_lock);
948
949 netdev->trans_start = jiffies;
950
951 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
952
953 DPRINTK(INFO, "Done. Send\n");
954 return NETDEV_TX_OK;
955 }
956
957 static void netxen_watchdog(unsigned long v)
958 {
959 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
960
961 SCHEDULE_WORK(&adapter->watchdog_task);
962 }
963
964 static void netxen_tx_timeout(struct net_device *netdev)
965 {
966 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
967
968 SCHEDULE_WORK(&port->tx_timeout_task);
969 }
970
971 static void netxen_tx_timeout_task(struct work_struct *work)
972 {
973 struct netxen_port *port =
974 container_of(work, struct netxen_port, tx_timeout_task);
975 struct net_device *netdev = port->netdev;
976 unsigned long flags;
977
978 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
979 netxen_nic_driver_name, netdev->name);
980
981 spin_lock_irqsave(&port->adapter->lock, flags);
982 netxen_nic_close(netdev);
983 netxen_nic_open(netdev);
984 spin_unlock_irqrestore(&port->adapter->lock, flags);
985 netdev->trans_start = jiffies;
986 netif_wake_queue(netdev);
987 }
988
989 static int
990 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
991 {
992 u32 ret = 0;
993
994 DPRINTK(INFO, "Entered handle ISR\n");
995
996 adapter->stats.ints++;
997
998 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
999 int count = 0;
1000 u32 mask;
1001 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
1002 if ((mask & 0x80) == 0) {
1003 /* not our interrupt */
1004 return ret;
1005 }
1006 netxen_nic_disable_int(adapter);
1007 /* Window = 0 or 1 */
1008 do {
1009 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
1010 ISR_INT_TARGET_STATUS));
1011 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
1012 } while (((mask & 0x80) != 0) && (++count < 32));
1013 if ((mask & 0x80) != 0)
1014 printk("Could not disable interrupt completely\n");
1015
1016 }
1017 adapter->stats.hostints++;
1018
1019 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
1020 if (netif_rx_schedule_prep(netdev)) {
1021 /*
1022 * Interrupts are already disabled.
1023 */
1024 __netif_rx_schedule(netdev);
1025 } else {
1026 static unsigned int intcount = 0;
1027 if ((++intcount & 0xfff) == 0xfff)
1028 printk(KERN_ERR
1029 "%s: %s interrupt %d while in poll\n",
1030 netxen_nic_driver_name, netdev->name,
1031 intcount);
1032 }
1033 ret = 1;
1034 }
1035
1036 if (ret == 0) {
1037 netxen_nic_enable_int(adapter);
1038 }
1039
1040 return ret;
1041 }
1042
1043 /*
1044 * netxen_intr - Interrupt Handler
1045 * @irq: interrupt number
1046 * data points to adapter stucture (which may be handling more than 1 port
1047 */
1048 irqreturn_t netxen_intr(int irq, void *data)
1049 {
1050 struct netxen_adapter *adapter;
1051 struct netxen_port *port;
1052 struct net_device *netdev;
1053 int i;
1054
1055 if (unlikely(!irq)) {
1056 return IRQ_NONE; /* Not our interrupt */
1057 }
1058
1059 adapter = (struct netxen_adapter *)data;
1060 for (i = 0; i < adapter->ahw.max_ports; i++) {
1061 port = adapter->port[i];
1062 netdev = port->netdev;
1063
1064 /* process our status queue (for all 4 ports) */
1065 if (netif_running(netdev)) {
1066 netxen_handle_int(adapter, netdev);
1067 break;
1068 }
1069 }
1070
1071 return IRQ_HANDLED;
1072 }
1073
1074 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1075 {
1076 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
1077 struct netxen_adapter *adapter = port->adapter;
1078 int work_to_do = min(*budget, netdev->quota);
1079 int done = 1;
1080 int ctx;
1081 int this_work_done;
1082 int work_done = 0;
1083
1084 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1085 port->stats.polled++;
1086
1087 work_done = 0;
1088 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1089 /*
1090 * Fairness issue. This will give undue weight to the
1091 * receive context 0.
1092 */
1093
1094 /*
1095 * To avoid starvation, we give each of our receivers,
1096 * a fraction of the quota. Sometimes, it might happen that we
1097 * have enough quota to process every packet, but since all the
1098 * packets are on one context, it gets only half of the quota,
1099 * and ends up not processing it.
1100 */
1101 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1102 work_to_do /
1103 MAX_RCV_CTX);
1104 work_done += this_work_done;
1105 }
1106
1107 netdev->quota -= work_done;
1108 *budget -= work_done;
1109
1110 if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
1111 done = 0;
1112
1113 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1114 done = 0;
1115
1116 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1117 work_done, work_to_do);
1118 if (done) {
1119 netif_rx_complete(netdev);
1120 netxen_nic_enable_int(adapter);
1121 }
1122
1123 return !done;
1124 }
1125
1126 #ifdef CONFIG_NET_POLL_CONTROLLER
1127 static void netxen_nic_poll_controller(struct net_device *netdev)
1128 {
1129 struct netxen_port *port = netdev_priv(netdev);
1130 struct netxen_adapter *adapter = port->adapter;
1131 disable_irq(adapter->irq);
1132 netxen_intr(adapter->irq, adapter);
1133 enable_irq(adapter->irq);
1134 }
1135 #endif
1136 /*
1137 * netxen_nic_ioctl () We provide the tcl/phanmon support through these
1138 * ioctls.
1139 */
1140 static int
1141 netxen_nic_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1142 {
1143 int err = 0;
1144 unsigned long nr_bytes = 0;
1145 struct netxen_port *port = netdev_priv(netdev);
1146 struct netxen_adapter *adapter = port->adapter;
1147 char dev_name[NETXEN_NIC_NAME_LEN];
1148
1149 DPRINTK(INFO, "doing ioctl for %s\n", netdev->name);
1150 switch (cmd) {
1151 case NETXEN_NIC_CMD:
1152 err = netxen_nic_do_ioctl(adapter, (void *)ifr->ifr_data, port);
1153 break;
1154
1155 case NETXEN_NIC_NAME:
1156 DPRINTK(INFO, "ioctl cmd for NetXen\n");
1157 if (ifr->ifr_data) {
1158 sprintf(dev_name, "%s-%d", NETXEN_NIC_NAME_RSP,
1159 port->portnum);
1160 nr_bytes =
1161 copy_to_user((char __user *)ifr->ifr_data, dev_name,
1162 NETXEN_NIC_NAME_LEN);
1163 if (nr_bytes)
1164 err = -EIO;
1165
1166 }
1167 break;
1168
1169 default:
1170 DPRINTK(INFO, "ioctl cmd %x not supported\n", cmd);
1171 err = -EOPNOTSUPP;
1172 break;
1173 }
1174
1175 return err;
1176 }
1177
1178 static struct pci_driver netxen_driver = {
1179 .name = netxen_nic_driver_name,
1180 .id_table = netxen_pci_tbl,
1181 .probe = netxen_nic_probe,
1182 .remove = __devexit_p(netxen_nic_remove)
1183 };
1184
1185 /* Driver Registration on NetXen card */
1186
1187 static int __init netxen_init_module(void)
1188 {
1189 if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
1190 return -ENOMEM;
1191
1192 return pci_module_init(&netxen_driver);
1193 }
1194
1195 module_init(netxen_init_module);
1196
1197 static void __exit netxen_exit_module(void)
1198 {
1199 /*
1200 * Wait for some time to allow the dma to drain, if any.
1201 */
1202 destroy_workqueue(netxen_workq);
1203 pci_unregister_driver(&netxen_driver);
1204 }
1205
1206 module_exit(netxen_exit_module);