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[IP]: Introduce ip_hdrlen()
[deliverable/linux.git] / drivers / net / netxen / netxen_nic_main.c
1 /*
2 * Copyright (C) 2003 - 2006 NetXen, Inc.
3 * All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
18 * MA 02111-1307, USA.
19 *
20 * The full GNU General Public License is included in this distribution
21 * in the file called LICENSE.
22 *
23 * Contact Information:
24 * info@netxen.com
25 * NetXen,
26 * 3965 Freedom Circle, Fourth floor,
27 * Santa Clara, CA 95054
28 *
29 *
30 * Main source file for NetXen NIC Driver on Linux
31 *
32 */
33
34 #include <linux/vmalloc.h>
35 #include <linux/highmem.h>
36 #include "netxen_nic_hw.h"
37
38 #include "netxen_nic.h"
39 #define DEFINE_GLOBAL_RECV_CRB
40 #include "netxen_nic_phan_reg.h"
41
42 #include <linux/dma-mapping.h>
43 #include <linux/vmalloc.h>
44 #include <net/ip.h>
45
46 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
47 MODULE_LICENSE("GPL");
48 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
49
50 char netxen_nic_driver_name[] = "netxen-nic";
51 static char netxen_nic_driver_string[] = "NetXen Network Driver version "
52 NETXEN_NIC_LINUX_VERSIONID;
53
54 #define NETXEN_NETDEV_WEIGHT 120
55 #define NETXEN_ADAPTER_UP_MAGIC 777
56 #define NETXEN_NIC_PEG_TUNE 0
57
58 u8 nx_p2_id = NX_P2_C0;
59
60 #define DMA_32BIT_MASK 0x00000000ffffffffULL
61 #define DMA_35BIT_MASK 0x00000007ffffffffULL
62
63 /* Local functions to NetXen NIC driver */
64 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
65 const struct pci_device_id *ent);
66 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
67 static int netxen_nic_open(struct net_device *netdev);
68 static int netxen_nic_close(struct net_device *netdev);
69 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
70 static void netxen_tx_timeout(struct net_device *netdev);
71 static void netxen_tx_timeout_task(struct work_struct *work);
72 static void netxen_watchdog(unsigned long);
73 static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
74 static int netxen_nic_poll(struct net_device *dev, int *budget);
75 #ifdef CONFIG_NET_POLL_CONTROLLER
76 static void netxen_nic_poll_controller(struct net_device *netdev);
77 #endif
78 static irqreturn_t netxen_intr(int irq, void *data);
79
80 /* PCI Device ID Table */
81 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
82 {PCI_DEVICE(0x4040, 0x0001)},
83 {PCI_DEVICE(0x4040, 0x0002)},
84 {PCI_DEVICE(0x4040, 0x0003)},
85 {PCI_DEVICE(0x4040, 0x0004)},
86 {PCI_DEVICE(0x4040, 0x0005)},
87 {PCI_DEVICE(0x4040, 0x0024)},
88 {PCI_DEVICE(0x4040, 0x0025)},
89 {0,}
90 };
91
92 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
93
94 struct workqueue_struct *netxen_workq;
95 static void netxen_watchdog(unsigned long);
96
97 /*
98 * netxen_nic_probe()
99 *
100 * The Linux system will invoke this after identifying the vendor ID and
101 * device Id in the pci_tbl supported by this module.
102 *
103 * A quad port card has one operational PCI config space, (function 0),
104 * which is used to access all four ports.
105 *
106 * This routine will initialize the adapter, and setup the global parameters
107 * along with the port's specific structure.
108 */
109 static int __devinit
110 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
111 {
112 struct net_device *netdev = NULL;
113 struct netxen_adapter *adapter = NULL;
114 struct netxen_port *port = NULL;
115 void __iomem *mem_ptr0 = NULL;
116 void __iomem *mem_ptr1 = NULL;
117 void __iomem *mem_ptr2 = NULL;
118
119 u8 __iomem *db_ptr = NULL;
120 unsigned long mem_base, mem_len, db_base, db_len;
121 int pci_using_dac, i, err;
122 int ring;
123 struct netxen_recv_context *recv_ctx = NULL;
124 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
125 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
126 u64 mac_addr[FLASH_NUM_PORTS + 1];
127 int valid_mac = 0;
128
129 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
130 /* In current scheme, we use only PCI function 0 */
131 if (PCI_FUNC(pdev->devfn) != 0) {
132 DPRINTK(ERR, "NetXen function %d will not be enabled.\n",
133 PCI_FUNC(pdev->devfn));
134 return -ENODEV;
135 }
136 if ((err = pci_enable_device(pdev)))
137 return err;
138 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
139 err = -ENODEV;
140 goto err_out_disable_pdev;
141 }
142
143 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
144 goto err_out_disable_pdev;
145
146 pci_set_master(pdev);
147 pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id);
148 if (nx_p2_id == NX_P2_C1 &&
149 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
150 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
151 pci_using_dac = 1;
152 } else {
153 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
154 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
155 goto err_out_free_res;
156
157 pci_using_dac = 0;
158 }
159
160 /* remap phys address */
161 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
162 mem_len = pci_resource_len(pdev, 0);
163
164 /* 128 Meg of memory */
165 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
166 mem_ptr1 =
167 ioremap(mem_base + SECOND_PAGE_GROUP_START, SECOND_PAGE_GROUP_SIZE);
168 mem_ptr2 =
169 ioremap(mem_base + THIRD_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
170
171 if ((mem_ptr0 == 0UL) || (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
172 DPRINTK(ERR,
173 "Cannot remap adapter memory aborting.:"
174 "0 -> %p, 1 -> %p, 2 -> %p\n",
175 mem_ptr0, mem_ptr1, mem_ptr2);
176
177 err = -EIO;
178 goto err_out_iounmap;
179 }
180 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
181 db_len = pci_resource_len(pdev, 4);
182
183 if (db_len == 0) {
184 printk(KERN_ERR "%s: doorbell is disabled\n",
185 netxen_nic_driver_name);
186 err = -EIO;
187 goto err_out_iounmap;
188 }
189 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
190 db_len);
191
192 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
193 if (!db_ptr) {
194 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
195 netxen_nic_driver_name);
196 err = -EIO;
197 goto err_out_iounmap;
198 }
199 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
200
201 /*
202 * Allocate a adapter structure which will manage all the initialization
203 * as well as the common resources for all ports...
204 * all the ports will have pointer to this adapter as well as Adapter
205 * will have pointers of all the ports structures.
206 */
207
208 /* One adapter structure for all 4 ports.... */
209 adapter = kzalloc(sizeof(struct netxen_adapter), GFP_KERNEL);
210 if (adapter == NULL) {
211 printk(KERN_ERR "%s: Could not allocate adapter memory:%d\n",
212 netxen_nic_driver_name,
213 (int)sizeof(struct netxen_adapter));
214 err = -ENOMEM;
215 goto err_out_dbunmap;
216 }
217
218 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS;
219 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
220 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
221 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
222
223 pci_set_drvdata(pdev, adapter);
224
225 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
226 if (cmd_buf_arr == NULL) {
227 printk(KERN_ERR
228 "%s: Could not allocate cmd_buf_arr memory:%d\n",
229 netxen_nic_driver_name, (int)TX_RINGSIZE);
230 err = -ENOMEM;
231 goto err_out_free_adapter;
232 }
233 memset(cmd_buf_arr, 0, TX_RINGSIZE);
234
235 for (i = 0; i < MAX_RCV_CTX; ++i) {
236 recv_ctx = &adapter->recv_ctx[i];
237 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
238 rcv_desc = &recv_ctx->rcv_desc[ring];
239 switch (RCV_DESC_TYPE(ring)) {
240 case RCV_DESC_NORMAL:
241 rcv_desc->max_rx_desc_count =
242 adapter->max_rx_desc_count;
243 rcv_desc->flags = RCV_DESC_NORMAL;
244 rcv_desc->dma_size = RX_DMA_MAP_LEN;
245 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
246 break;
247
248 case RCV_DESC_JUMBO:
249 rcv_desc->max_rx_desc_count =
250 adapter->max_jumbo_rx_desc_count;
251 rcv_desc->flags = RCV_DESC_JUMBO;
252 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
253 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
254 break;
255
256 case RCV_RING_LRO:
257 rcv_desc->max_rx_desc_count =
258 adapter->max_lro_rx_desc_count;
259 rcv_desc->flags = RCV_DESC_LRO;
260 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
261 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
262 break;
263
264 }
265 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
266 vmalloc(RCV_BUFFSIZE);
267
268 if (rcv_desc->rx_buf_arr == NULL) {
269 printk(KERN_ERR "%s: Could not allocate"
270 "rcv_desc->rx_buf_arr memory:%d\n",
271 netxen_nic_driver_name,
272 (int)RCV_BUFFSIZE);
273 err = -ENOMEM;
274 goto err_out_free_rx_buffer;
275 }
276 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
277 }
278
279 }
280
281 adapter->cmd_buf_arr = cmd_buf_arr;
282 adapter->ahw.pci_base0 = mem_ptr0;
283 adapter->ahw.pci_base1 = mem_ptr1;
284 adapter->ahw.pci_base2 = mem_ptr2;
285 adapter->ahw.db_base = db_ptr;
286 adapter->ahw.db_len = db_len;
287 spin_lock_init(&adapter->tx_lock);
288 spin_lock_init(&adapter->lock);
289 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
290 #ifdef CONFIG_IA64
291 netxen_pinit_from_rom(adapter, 0);
292 udelay(500);
293 netxen_load_firmware(adapter);
294 #endif
295
296 /*
297 * Set the CRB window to invalid. If any register in window 0 is
298 * accessed it should set the window to 0 and then reset it to 1.
299 */
300 adapter->curr_window = 255;
301 /*
302 * Adapter in our case is quad port so initialize it before
303 * initializing the ports
304 */
305 netxen_initialize_adapter_hw(adapter); /* initialize the adapter */
306
307 netxen_initialize_adapter_ops(adapter);
308
309 init_timer(&adapter->watchdog_timer);
310 adapter->ahw.xg_linkup = 0;
311 adapter->watchdog_timer.function = &netxen_watchdog;
312 adapter->watchdog_timer.data = (unsigned long)adapter;
313 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
314 adapter->ahw.pdev = pdev;
315 adapter->proc_cmd_buf_counter = 0;
316 adapter->ahw.revision_id = nx_p2_id;
317
318 if (pci_enable_msi(pdev)) {
319 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
320 printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
321 " error\n", netxen_nic_driver_name);
322 } else
323 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
324
325 if (netxen_is_flash_supported(adapter) == 0 &&
326 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
327 valid_mac = 1;
328 else
329 valid_mac = 0;
330
331 /*
332 * Initialize all the CRB registers here.
333 */
334 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
335 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
336 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
337
338 /* do this before waking up pegs so that we have valid dummy dma addr */
339 err = netxen_initialize_adapter_offload(adapter);
340 if (err) {
341 goto err_out_free_dev;
342 }
343
344 /* Unlock the HW, prompting the boot sequence */
345 writel(1,
346 NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
347
348 /* Handshake with the card before we register the devices. */
349 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
350
351 /* initialize the all the ports */
352 adapter->active_ports = 0;
353
354 for (i = 0; i < adapter->ahw.max_ports; i++) {
355 netdev = alloc_etherdev(sizeof(struct netxen_port));
356 if (!netdev) {
357 printk(KERN_ERR "%s: could not allocate netdev for port"
358 " %d\n", netxen_nic_driver_name, i + 1);
359 goto err_out_free_dev;
360 }
361
362 SET_MODULE_OWNER(netdev);
363 SET_NETDEV_DEV(netdev, &pdev->dev);
364
365 port = netdev_priv(netdev);
366 port->netdev = netdev;
367 port->pdev = pdev;
368 port->adapter = adapter;
369 port->portnum = i; /* Gigabit port number from 0-3 */
370
371 netdev->open = netxen_nic_open;
372 netdev->stop = netxen_nic_close;
373 netdev->hard_start_xmit = netxen_nic_xmit_frame;
374 netdev->get_stats = netxen_nic_get_stats;
375 netdev->set_multicast_list = netxen_nic_set_multi;
376 netdev->set_mac_address = netxen_nic_set_mac;
377 netdev->change_mtu = netxen_nic_change_mtu;
378 netdev->tx_timeout = netxen_tx_timeout;
379 netdev->watchdog_timeo = HZ;
380
381 netxen_nic_change_mtu(netdev, netdev->mtu);
382
383 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
384 netdev->poll = netxen_nic_poll;
385 netdev->weight = NETXEN_NETDEV_WEIGHT;
386 #ifdef CONFIG_NET_POLL_CONTROLLER
387 netdev->poll_controller = netxen_nic_poll_controller;
388 #endif
389 /* ScatterGather support */
390 netdev->features = NETIF_F_SG;
391 netdev->features |= NETIF_F_IP_CSUM;
392 netdev->features |= NETIF_F_TSO;
393
394 if (pci_using_dac)
395 netdev->features |= NETIF_F_HIGHDMA;
396
397 if (valid_mac) {
398 unsigned char *p = (unsigned char *)&mac_addr[i];
399 netdev->dev_addr[0] = *(p + 5);
400 netdev->dev_addr[1] = *(p + 4);
401 netdev->dev_addr[2] = *(p + 3);
402 netdev->dev_addr[3] = *(p + 2);
403 netdev->dev_addr[4] = *(p + 1);
404 netdev->dev_addr[5] = *(p + 0);
405
406 memcpy(netdev->perm_addr, netdev->dev_addr,
407 netdev->addr_len);
408 if (!is_valid_ether_addr(netdev->perm_addr)) {
409 printk(KERN_ERR "%s: Bad MAC address "
410 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
411 netxen_nic_driver_name,
412 netdev->dev_addr[0],
413 netdev->dev_addr[1],
414 netdev->dev_addr[2],
415 netdev->dev_addr[3],
416 netdev->dev_addr[4],
417 netdev->dev_addr[5]);
418 } else {
419 if (adapter->macaddr_set)
420 adapter->macaddr_set(port,
421 netdev->dev_addr);
422 }
423 }
424 INIT_WORK(&port->tx_timeout_task, netxen_tx_timeout_task);
425 netif_carrier_off(netdev);
426 netif_stop_queue(netdev);
427
428 if ((err = register_netdev(netdev))) {
429 printk(KERN_ERR "%s: register_netdev failed port #%d"
430 " aborting\n", netxen_nic_driver_name, i + 1);
431 err = -EIO;
432 free_netdev(netdev);
433 goto err_out_free_dev;
434 }
435 adapter->port_count++;
436 adapter->port[i] = port;
437 }
438 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
439 netxen_pinit_from_rom(adapter, 0);
440 udelay(500);
441 netxen_load_firmware(adapter);
442 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
443 /*
444 * delay a while to ensure that the Pegs are up & running.
445 * Otherwise, we might see some flaky behaviour.
446 */
447 udelay(100);
448
449 switch (adapter->ahw.board_type) {
450 case NETXEN_NIC_GBE:
451 printk("%s: QUAD GbE board initialized\n",
452 netxen_nic_driver_name);
453 break;
454
455 case NETXEN_NIC_XGBE:
456 printk("%s: XGbE board initialized\n", netxen_nic_driver_name);
457 break;
458 }
459
460 adapter->driver_mismatch = 0;
461
462 return 0;
463
464 err_out_free_dev:
465 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
466 pci_disable_msi(pdev);
467 for (i = 0; i < adapter->port_count; i++) {
468 port = adapter->port[i];
469 if ((port) && (port->netdev)) {
470 unregister_netdev(port->netdev);
471 free_netdev(port->netdev);
472 }
473 }
474
475 netxen_free_adapter_offload(adapter);
476
477 err_out_free_rx_buffer:
478 for (i = 0; i < MAX_RCV_CTX; ++i) {
479 recv_ctx = &adapter->recv_ctx[i];
480 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
481 rcv_desc = &recv_ctx->rcv_desc[ring];
482 if (rcv_desc->rx_buf_arr != NULL) {
483 vfree(rcv_desc->rx_buf_arr);
484 rcv_desc->rx_buf_arr = NULL;
485 }
486 }
487 }
488 vfree(cmd_buf_arr);
489
490 err_out_free_adapter:
491 pci_set_drvdata(pdev, NULL);
492 kfree(adapter);
493
494 err_out_dbunmap:
495 if (db_ptr)
496 iounmap(db_ptr);
497
498 err_out_iounmap:
499 if (mem_ptr0)
500 iounmap(mem_ptr0);
501 if (mem_ptr1)
502 iounmap(mem_ptr1);
503 if (mem_ptr2)
504 iounmap(mem_ptr2);
505
506 err_out_free_res:
507 pci_release_regions(pdev);
508 err_out_disable_pdev:
509 pci_disable_device(pdev);
510 return err;
511 }
512
513 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
514 {
515 struct netxen_adapter *adapter;
516 struct netxen_port *port;
517 struct netxen_rx_buffer *buffer;
518 struct netxen_recv_context *recv_ctx;
519 struct netxen_rcv_desc_ctx *rcv_desc;
520 int i;
521 int ctxid, ring;
522
523 adapter = pci_get_drvdata(pdev);
524 if (adapter == NULL)
525 return;
526
527 if (adapter->irq)
528 free_irq(adapter->irq, adapter);
529 netxen_nic_stop_all_ports(adapter);
530 /* leave the hw in the same state as reboot */
531 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
532 netxen_pinit_from_rom(adapter, 0);
533 udelay(500);
534 netxen_load_firmware(adapter);
535 netxen_free_adapter_offload(adapter);
536
537 mdelay(1000); /* Delay for a while to drain the DMA engines */
538 for (i = 0; i < adapter->port_count; i++) {
539 port = adapter->port[i];
540 if ((port) && (port->netdev)) {
541 unregister_netdev(port->netdev);
542 free_netdev(port->netdev);
543 }
544 }
545
546 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
547 pci_disable_msi(pdev);
548 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
549 netxen_free_hw_resources(adapter);
550
551 iounmap(adapter->ahw.db_base);
552 iounmap(adapter->ahw.pci_base0);
553 iounmap(adapter->ahw.pci_base1);
554 iounmap(adapter->ahw.pci_base2);
555
556 pci_release_regions(pdev);
557 pci_disable_device(pdev);
558 pci_set_drvdata(pdev, NULL);
559
560 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
561 recv_ctx = &adapter->recv_ctx[ctxid];
562 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
563 rcv_desc = &recv_ctx->rcv_desc[ring];
564 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
565 buffer = &(rcv_desc->rx_buf_arr[i]);
566 if (buffer->state == NETXEN_BUFFER_FREE)
567 continue;
568 pci_unmap_single(pdev, buffer->dma,
569 rcv_desc->dma_size,
570 PCI_DMA_FROMDEVICE);
571 if (buffer->skb != NULL)
572 dev_kfree_skb_any(buffer->skb);
573 }
574 vfree(rcv_desc->rx_buf_arr);
575 }
576 }
577
578 vfree(adapter->cmd_buf_arr);
579 kfree(adapter);
580 }
581
582 /*
583 * Called when a network interface is made active
584 * @returns 0 on success, negative value on failure
585 */
586 static int netxen_nic_open(struct net_device *netdev)
587 {
588 struct netxen_port *port = netdev_priv(netdev);
589 struct netxen_adapter *adapter = port->adapter;
590 int err = 0;
591 int ctx, ring;
592
593 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
594 err = netxen_init_firmware(adapter);
595 if (err != 0) {
596 printk(KERN_ERR "Failed to init firmware\n");
597 return -EIO;
598 }
599 netxen_nic_flash_print(adapter);
600 if (adapter->init_niu)
601 adapter->init_niu(adapter);
602
603 /* setup all the resources for the Phantom... */
604 /* this include the descriptors for rcv, tx, and status */
605 netxen_nic_clear_stats(adapter);
606 err = netxen_nic_hw_resources(adapter);
607 if (err) {
608 printk(KERN_ERR "Error in setting hw resources:%d\n",
609 err);
610 return err;
611 }
612 if (adapter->init_port
613 && adapter->init_port(adapter, port->portnum) != 0) {
614 printk(KERN_ERR "%s: Failed to initialize port %d\n",
615 netxen_nic_driver_name, port->portnum);
616 netxen_free_hw_resources(adapter);
617 return -EIO;
618 }
619 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
620 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
621 netxen_post_rx_buffers(adapter, ctx, ring);
622 }
623 adapter->irq = adapter->ahw.pdev->irq;
624 err = request_irq(adapter->ahw.pdev->irq, &netxen_intr,
625 IRQF_SHARED | IRQF_SAMPLE_RANDOM,
626 netdev->name, adapter);
627 if (err) {
628 printk(KERN_ERR "request_irq failed with: %d\n", err);
629 netxen_free_hw_resources(adapter);
630 return err;
631 }
632
633 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
634 }
635 adapter->active_ports++;
636 if (adapter->active_ports == 1) {
637 if (!adapter->driver_mismatch)
638 mod_timer(&adapter->watchdog_timer, jiffies);
639
640 netxen_nic_enable_int(adapter);
641 }
642
643 /* Done here again so that even if phantom sw overwrote it,
644 * we set it */
645 if (adapter->macaddr_set)
646 adapter->macaddr_set(port, netdev->dev_addr);
647 netxen_nic_set_link_parameters(port);
648
649 netxen_nic_set_multi(netdev);
650 if (adapter->set_mtu)
651 adapter->set_mtu(port, netdev->mtu);
652
653 if (!adapter->driver_mismatch)
654 netif_start_queue(netdev);
655
656 return 0;
657 }
658
659 /*
660 * netxen_nic_close - Disables a network interface entry point
661 */
662 static int netxen_nic_close(struct net_device *netdev)
663 {
664 struct netxen_port *port = netdev_priv(netdev);
665 struct netxen_adapter *adapter = port->adapter;
666 int i, j;
667 struct netxen_cmd_buffer *cmd_buff;
668 struct netxen_skb_frag *buffrag;
669
670 netif_carrier_off(netdev);
671 netif_stop_queue(netdev);
672
673 adapter->active_ports--;
674
675 if (!adapter->active_ports) {
676 netxen_nic_disable_int(adapter);
677 cmd_buff = adapter->cmd_buf_arr;
678 for (i = 0; i < adapter->max_tx_desc_count; i++) {
679 buffrag = cmd_buff->frag_array;
680 if (buffrag->dma) {
681 pci_unmap_single(port->pdev, buffrag->dma,
682 buffrag->length,
683 PCI_DMA_TODEVICE);
684 buffrag->dma = (u64) NULL;
685 }
686 for (j = 0; j < cmd_buff->frag_count; j++) {
687 buffrag++;
688 if (buffrag->dma) {
689 pci_unmap_page(port->pdev,
690 buffrag->dma,
691 buffrag->length,
692 PCI_DMA_TODEVICE);
693 buffrag->dma = (u64) NULL;
694 }
695 }
696 /* Free the skb we received in netxen_nic_xmit_frame */
697 if (cmd_buff->skb) {
698 dev_kfree_skb_any(cmd_buff->skb);
699 cmd_buff->skb = NULL;
700 }
701 cmd_buff++;
702 }
703 FLUSH_SCHEDULED_WORK();
704 del_timer_sync(&adapter->watchdog_timer);
705 }
706
707 return 0;
708 }
709
710 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
711 {
712 struct netxen_port *port = netdev_priv(netdev);
713 struct netxen_adapter *adapter = port->adapter;
714 struct netxen_hardware_context *hw = &adapter->ahw;
715 unsigned int first_seg_len = skb->len - skb->data_len;
716 struct netxen_skb_frag *buffrag;
717 unsigned int i;
718
719 u32 producer = 0;
720 u32 saved_producer = 0;
721 struct cmd_desc_type0 *hwdesc;
722 int k;
723 struct netxen_cmd_buffer *pbuf = NULL;
724 static int dropped_packet = 0;
725 int frag_count;
726 u32 local_producer = 0;
727 u32 max_tx_desc_count = 0;
728 u32 last_cmd_consumer = 0;
729 int no_of_desc;
730
731 port->stats.xmitcalled++;
732 frag_count = skb_shinfo(skb)->nr_frags + 1;
733
734 if (unlikely(skb->len <= 0)) {
735 dev_kfree_skb_any(skb);
736 port->stats.badskblen++;
737 return NETDEV_TX_OK;
738 }
739
740 if (frag_count > MAX_BUFFERS_PER_CMD) {
741 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
742 "too large, can handle only %d frags\n",
743 netxen_nic_driver_name, netdev->name,
744 frag_count, MAX_BUFFERS_PER_CMD);
745 port->stats.txdropped++;
746 if ((++dropped_packet & 0xff) == 0xff)
747 printk("%s: %s droppped packets = %d\n",
748 netxen_nic_driver_name, netdev->name,
749 dropped_packet);
750
751 return NETDEV_TX_OK;
752 }
753
754 /*
755 * Everything is set up. Now, we just need to transmit it out.
756 * Note that we have to copy the contents of buffer over to
757 * right place. Later on, this can be optimized out by de-coupling the
758 * producer index from the buffer index.
759 */
760 retry_getting_window:
761 spin_lock_bh(&adapter->tx_lock);
762 if (adapter->total_threads == MAX_XMIT_PRODUCERS) {
763 spin_unlock_bh(&adapter->tx_lock);
764 /*
765 * Yield CPU
766 */
767 if (!in_atomic())
768 schedule();
769 else {
770 for (i = 0; i < 20; i++)
771 cpu_relax(); /*This a nop instr on i386 */
772 }
773 goto retry_getting_window;
774 }
775 local_producer = adapter->cmd_producer;
776 /* There 4 fragments per descriptor */
777 no_of_desc = (frag_count + 3) >> 2;
778 if (netdev->features & NETIF_F_TSO) {
779 if (skb_shinfo(skb)->gso_size > 0) {
780
781 no_of_desc++;
782 if ((ip_hdrlen(skb) + skb->h.th->doff * 4 +
783 sizeof(struct ethhdr)) >
784 (sizeof(struct cmd_desc_type0) - 2)) {
785 no_of_desc++;
786 }
787 }
788 }
789 k = adapter->cmd_producer;
790 max_tx_desc_count = adapter->max_tx_desc_count;
791 last_cmd_consumer = adapter->last_cmd_consumer;
792 if ((k + no_of_desc) >=
793 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
794 last_cmd_consumer)) {
795 port->stats.nocmddescriptor++;
796 DPRINTK(ERR, "No command descriptors available,"
797 " producer = %d, consumer = %d count=%llu,"
798 " dropping packet\n", producer,
799 adapter->last_cmd_consumer,
800 port->stats.nocmddescriptor);
801
802 netif_stop_queue(netdev);
803 port->flags |= NETXEN_NETDEV_STATUS;
804 spin_unlock_bh(&adapter->tx_lock);
805 return NETDEV_TX_BUSY;
806 }
807 k = get_index_range(k, max_tx_desc_count, no_of_desc);
808 adapter->cmd_producer = k;
809 adapter->total_threads++;
810 adapter->num_threads++;
811
812 spin_unlock_bh(&adapter->tx_lock);
813 /* Copy the descriptors into the hardware */
814 producer = local_producer;
815 saved_producer = producer;
816 hwdesc = &hw->cmd_desc_head[producer];
817 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
818 /* Take skb->data itself */
819 pbuf = &adapter->cmd_buf_arr[producer];
820 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
821 pbuf->mss = skb_shinfo(skb)->gso_size;
822 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
823 } else {
824 pbuf->mss = 0;
825 hwdesc->mss = 0;
826 }
827 pbuf->total_length = skb->len;
828 pbuf->skb = skb;
829 pbuf->cmd = TX_ETHER_PKT;
830 pbuf->frag_count = frag_count;
831 pbuf->port = port->portnum;
832 buffrag = &pbuf->frag_array[0];
833 buffrag->dma = pci_map_single(port->pdev, skb->data, first_seg_len,
834 PCI_DMA_TODEVICE);
835 buffrag->length = first_seg_len;
836 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
837 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
838 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
839
840 netxen_set_cmd_desc_port(hwdesc, port->portnum);
841 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
842 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
843
844 for (i = 1, k = 1; i < frag_count; i++, k++) {
845 struct skb_frag_struct *frag;
846 int len, temp_len;
847 unsigned long offset;
848 dma_addr_t temp_dma;
849
850 /* move to next desc. if there is a need */
851 if ((i & 0x3) == 0) {
852 k = 0;
853 producer = get_next_index(producer,
854 adapter->max_tx_desc_count);
855 hwdesc = &hw->cmd_desc_head[producer];
856 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
857 }
858 frag = &skb_shinfo(skb)->frags[i - 1];
859 len = frag->size;
860 offset = frag->page_offset;
861
862 temp_len = len;
863 temp_dma = pci_map_page(port->pdev, frag->page, offset,
864 len, PCI_DMA_TODEVICE);
865
866 buffrag++;
867 buffrag->dma = temp_dma;
868 buffrag->length = temp_len;
869
870 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
871 switch (k) {
872 case 0:
873 hwdesc->buffer1_length = cpu_to_le16(temp_len);
874 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
875 break;
876 case 1:
877 hwdesc->buffer2_length = cpu_to_le16(temp_len);
878 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
879 break;
880 case 2:
881 hwdesc->buffer3_length = cpu_to_le16(temp_len);
882 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
883 break;
884 case 3:
885 hwdesc->buffer4_length = cpu_to_le16(temp_len);
886 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
887 break;
888 }
889 frag++;
890 }
891 producer = get_next_index(producer, adapter->max_tx_desc_count);
892
893 /* might change opcode to TX_TCP_LSO */
894 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
895
896 /* For LSO, we need to copy the MAC/IP/TCP headers into
897 * the descriptor ring
898 */
899 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
900 == TX_TCP_LSO) {
901 int hdr_len, first_hdr_len, more_hdr;
902 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
903 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
904 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
905 more_hdr = 1;
906 } else {
907 first_hdr_len = hdr_len;
908 more_hdr = 0;
909 }
910 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
911 hwdesc = &hw->cmd_desc_head[producer];
912
913 /* copy the first 64 bytes */
914 memcpy(((void *)hwdesc) + 2,
915 (void *)(skb->data), first_hdr_len);
916 producer = get_next_index(producer, max_tx_desc_count);
917
918 if (more_hdr) {
919 hwdesc = &hw->cmd_desc_head[producer];
920 /* copy the next 64 bytes - should be enough except
921 * for pathological case
922 */
923 memcpy((void *)hwdesc, (void *)(skb->data) +
924 first_hdr_len, hdr_len - first_hdr_len);
925 producer = get_next_index(producer, max_tx_desc_count);
926 }
927 }
928 spin_lock_bh(&adapter->tx_lock);
929 port->stats.txbytes +=
930 netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
931 /* Code to update the adapter considering how many producer threads
932 are currently working */
933 if ((--adapter->num_threads) == 0) {
934 /* This is the last thread */
935 u32 crb_producer = adapter->cmd_producer;
936 writel(crb_producer,
937 NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
938 wmb();
939 adapter->total_threads = 0;
940 }
941
942 port->stats.xmitfinished++;
943 spin_unlock_bh(&adapter->tx_lock);
944
945 netdev->trans_start = jiffies;
946
947 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
948
949 DPRINTK(INFO, "Done. Send\n");
950 return NETDEV_TX_OK;
951 }
952
953 static void netxen_watchdog(unsigned long v)
954 {
955 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
956
957 SCHEDULE_WORK(&adapter->watchdog_task);
958 }
959
960 static void netxen_tx_timeout(struct net_device *netdev)
961 {
962 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
963
964 SCHEDULE_WORK(&port->tx_timeout_task);
965 }
966
967 static void netxen_tx_timeout_task(struct work_struct *work)
968 {
969 struct netxen_port *port =
970 container_of(work, struct netxen_port, tx_timeout_task);
971 struct net_device *netdev = port->netdev;
972 unsigned long flags;
973
974 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
975 netxen_nic_driver_name, netdev->name);
976
977 spin_lock_irqsave(&port->adapter->lock, flags);
978 netxen_nic_close(netdev);
979 netxen_nic_open(netdev);
980 spin_unlock_irqrestore(&port->adapter->lock, flags);
981 netdev->trans_start = jiffies;
982 netif_wake_queue(netdev);
983 }
984
985 static int
986 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
987 {
988 u32 ret = 0;
989
990 DPRINTK(INFO, "Entered handle ISR\n");
991
992 adapter->stats.ints++;
993
994 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
995 int count = 0;
996 u32 mask;
997 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
998 if ((mask & 0x80) == 0) {
999 /* not our interrupt */
1000 return ret;
1001 }
1002 netxen_nic_disable_int(adapter);
1003 /* Window = 0 or 1 */
1004 do {
1005 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
1006 ISR_INT_TARGET_STATUS));
1007 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
1008 } while (((mask & 0x80) != 0) && (++count < 32));
1009 if ((mask & 0x80) != 0)
1010 printk("Could not disable interrupt completely\n");
1011
1012 }
1013 adapter->stats.hostints++;
1014
1015 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
1016 if (netif_rx_schedule_prep(netdev)) {
1017 /*
1018 * Interrupts are already disabled.
1019 */
1020 __netif_rx_schedule(netdev);
1021 } else {
1022 static unsigned int intcount = 0;
1023 if ((++intcount & 0xfff) == 0xfff)
1024 printk(KERN_ERR
1025 "%s: %s interrupt %d while in poll\n",
1026 netxen_nic_driver_name, netdev->name,
1027 intcount);
1028 }
1029 ret = 1;
1030 }
1031
1032 if (ret == 0) {
1033 netxen_nic_enable_int(adapter);
1034 }
1035
1036 return ret;
1037 }
1038
1039 /*
1040 * netxen_intr - Interrupt Handler
1041 * @irq: interrupt number
1042 * data points to adapter stucture (which may be handling more than 1 port
1043 */
1044 irqreturn_t netxen_intr(int irq, void *data)
1045 {
1046 struct netxen_adapter *adapter;
1047 struct netxen_port *port;
1048 struct net_device *netdev;
1049 int i;
1050
1051 if (unlikely(!irq)) {
1052 return IRQ_NONE; /* Not our interrupt */
1053 }
1054
1055 adapter = (struct netxen_adapter *)data;
1056 for (i = 0; i < adapter->ahw.max_ports; i++) {
1057 port = adapter->port[i];
1058 netdev = port->netdev;
1059
1060 /* process our status queue (for all 4 ports) */
1061 if (netif_running(netdev)) {
1062 netxen_handle_int(adapter, netdev);
1063 break;
1064 }
1065 }
1066
1067 return IRQ_HANDLED;
1068 }
1069
1070 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1071 {
1072 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
1073 struct netxen_adapter *adapter = port->adapter;
1074 int work_to_do = min(*budget, netdev->quota);
1075 int done = 1;
1076 int ctx;
1077 int this_work_done;
1078 int work_done = 0;
1079
1080 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1081 port->stats.polled++;
1082
1083 work_done = 0;
1084 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1085 /*
1086 * Fairness issue. This will give undue weight to the
1087 * receive context 0.
1088 */
1089
1090 /*
1091 * To avoid starvation, we give each of our receivers,
1092 * a fraction of the quota. Sometimes, it might happen that we
1093 * have enough quota to process every packet, but since all the
1094 * packets are on one context, it gets only half of the quota,
1095 * and ends up not processing it.
1096 */
1097 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1098 work_to_do /
1099 MAX_RCV_CTX);
1100 work_done += this_work_done;
1101 }
1102
1103 netdev->quota -= work_done;
1104 *budget -= work_done;
1105
1106 if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
1107 done = 0;
1108
1109 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1110 done = 0;
1111
1112 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1113 work_done, work_to_do);
1114 if (done) {
1115 netif_rx_complete(netdev);
1116 netxen_nic_enable_int(adapter);
1117 }
1118
1119 return !done;
1120 }
1121
1122 #ifdef CONFIG_NET_POLL_CONTROLLER
1123 static void netxen_nic_poll_controller(struct net_device *netdev)
1124 {
1125 struct netxen_port *port = netdev_priv(netdev);
1126 struct netxen_adapter *adapter = port->adapter;
1127 disable_irq(adapter->irq);
1128 netxen_intr(adapter->irq, adapter);
1129 enable_irq(adapter->irq);
1130 }
1131 #endif
1132
1133 static struct pci_driver netxen_driver = {
1134 .name = netxen_nic_driver_name,
1135 .id_table = netxen_pci_tbl,
1136 .probe = netxen_nic_probe,
1137 .remove = __devexit_p(netxen_nic_remove)
1138 };
1139
1140 /* Driver Registration on NetXen card */
1141
1142 static int __init netxen_init_module(void)
1143 {
1144 if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
1145 return -ENOMEM;
1146
1147 return pci_register_driver(&netxen_driver);
1148 }
1149
1150 module_init(netxen_init_module);
1151
1152 static void __exit netxen_exit_module(void)
1153 {
1154 /*
1155 * Wait for some time to allow the dma to drain, if any.
1156 */
1157 pci_unregister_driver(&netxen_driver);
1158 destroy_workqueue(netxen_workq);
1159 }
1160
1161 module_exit(netxen_exit_module);
Linux kernel - Deliverables
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