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NetXen: Driver unload fixes
[linux-2.6/verdex.git] / drivers / net / netxen / netxen_nic_main.c
blobb2fc2bccc396d04290af01ca444943d0662bc47c
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
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-nic";
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 u8 nx_p2_id = NX_P2_C0;
60
61 #define DMA_32BIT_MASK 0x00000000ffffffffULL
62 #define DMA_35BIT_MASK 0x00000007ffffffffULL
63
64 /* Local functions to NetXen NIC driver */
65 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
66 const struct pci_device_id *ent);
67 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
68 static int netxen_nic_open(struct net_device *netdev);
69 static int netxen_nic_close(struct net_device *netdev);
70 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
71 static void netxen_tx_timeout(struct net_device *netdev);
72 static void netxen_tx_timeout_task(struct work_struct *work);
73 static void netxen_watchdog(unsigned long);
74 static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
75 static int netxen_nic_poll(struct net_device *dev, int *budget);
76 #ifdef CONFIG_NET_POLL_CONTROLLER
77 static void netxen_nic_poll_controller(struct net_device *netdev);
78 #endif
79 static irqreturn_t netxen_intr(int irq, void *data);
80
81 /* PCI Device ID Table */
82 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
83 {PCI_DEVICE(0x4040, 0x0001)},
84 {PCI_DEVICE(0x4040, 0x0002)},
85 {PCI_DEVICE(0x4040, 0x0003)},
86 {PCI_DEVICE(0x4040, 0x0004)},
87 {PCI_DEVICE(0x4040, 0x0005)},
88 {PCI_DEVICE(0x4040, 0x0024)},
89 {PCI_DEVICE(0x4040, 0x0025)},
90 {0,}
91 };
92
93 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
94
95 struct workqueue_struct *netxen_workq;
96 static void netxen_watchdog(unsigned long);
97
98 /*
99 * netxen_nic_probe()
100 *
101 * The Linux system will invoke this after identifying the vendor ID and
102 * device Id in the pci_tbl supported by this module.
103 *
104 * A quad port card has one operational PCI config space, (function 0),
105 * which is used to access all four ports.
106 *
107 * This routine will initialize the adapter, and setup the global parameters
108 * along with the port's specific structure.
109 */
110 static int __devinit
111 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
112 {
113 struct net_device *netdev = NULL;
114 struct netxen_adapter *adapter = NULL;
115 struct netxen_port *port = NULL;
116 void __iomem *mem_ptr0 = NULL;
117 void __iomem *mem_ptr1 = NULL;
118 void __iomem *mem_ptr2 = NULL;
119
120 u8 __iomem *db_ptr = NULL;
121 unsigned long mem_base, mem_len, db_base, db_len;
122 int pci_using_dac, i, err;
123 int ring;
124 struct netxen_recv_context *recv_ctx = NULL;
125 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
126 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
127 u64 mac_addr[FLASH_NUM_PORTS + 1];
128 int valid_mac = 0;
129
130 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
131 /* In current scheme, we use only PCI function 0 */
132 if (PCI_FUNC(pdev->devfn) != 0) {
133 DPRINTK(ERR, "NetXen function %d will not be enabled.\n",
134 PCI_FUNC(pdev->devfn));
135 return -ENODEV;
136 }
137 if ((err = pci_enable_device(pdev)))
138 return err;
139 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
140 err = -ENODEV;
141 goto err_out_disable_pdev;
142 }
143
144 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
145 goto err_out_disable_pdev;
146
147 pci_set_master(pdev);
148 pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id);
149 if (nx_p2_id == NX_P2_C1 &&
150 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
151 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
152 pci_using_dac = 1;
153 } else {
154 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
155 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
156 goto err_out_free_res;
157
158 pci_using_dac = 0;
159 }
160
161 /* remap phys address */
162 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
163 mem_len = pci_resource_len(pdev, 0);
164
165 /* 128 Meg of memory */
166 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
167 mem_ptr1 =
168 ioremap(mem_base + SECOND_PAGE_GROUP_START, SECOND_PAGE_GROUP_SIZE);
169 mem_ptr2 =
170 ioremap(mem_base + THIRD_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
171
172 if ((mem_ptr0 == 0UL) || (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
173 DPRINTK(ERR,
174 "Cannot remap adapter memory aborting.:"
175 "0 -> %p, 1 -> %p, 2 -> %p\n",
176 mem_ptr0, mem_ptr1, mem_ptr2);
177
178 err = -EIO;
179 goto err_out_iounmap;
180 }
181 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
182 db_len = pci_resource_len(pdev, 4);
183
184 if (db_len == 0) {
185 printk(KERN_ERR "%s: doorbell is disabled\n",
186 netxen_nic_driver_name);
187 err = -EIO;
188 goto err_out_iounmap;
189 }
190 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
191 db_len);
192
193 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
194 if (!db_ptr) {
195 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
196 netxen_nic_driver_name);
197 err = -EIO;
198 goto err_out_iounmap;
199 }
200 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
201
202 /*
203 * Allocate a adapter structure which will manage all the initialization
204 * as well as the common resources for all ports...
205 * all the ports will have pointer to this adapter as well as Adapter
206 * will have pointers of all the ports structures.
207 */
208
209 /* One adapter structure for all 4 ports.... */
210 adapter = kzalloc(sizeof(struct netxen_adapter), GFP_KERNEL);
211 if (adapter == NULL) {
212 printk(KERN_ERR "%s: Could not allocate adapter memory:%d\n",
213 netxen_nic_driver_name,
214 (int)sizeof(struct netxen_adapter));
215 err = -ENOMEM;
216 goto err_out_dbunmap;
217 }
218
219 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS;
220 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
221 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
222 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
223
224 pci_set_drvdata(pdev, adapter);
225
226 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
227 if (cmd_buf_arr == NULL) {
228 printk(KERN_ERR
229 "%s: Could not allocate cmd_buf_arr memory:%d\n",
230 netxen_nic_driver_name, (int)TX_RINGSIZE);
231 err = -ENOMEM;
232 goto err_out_free_adapter;
233 }
234 memset(cmd_buf_arr, 0, TX_RINGSIZE);
235
236 for (i = 0; i < MAX_RCV_CTX; ++i) {
237 recv_ctx = &adapter->recv_ctx[i];
238 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
239 rcv_desc = &recv_ctx->rcv_desc[ring];
240 switch (RCV_DESC_TYPE(ring)) {
241 case RCV_DESC_NORMAL:
242 rcv_desc->max_rx_desc_count =
243 adapter->max_rx_desc_count;
244 rcv_desc->flags = RCV_DESC_NORMAL;
245 rcv_desc->dma_size = RX_DMA_MAP_LEN;
246 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
247 break;
248
249 case RCV_DESC_JUMBO:
250 rcv_desc->max_rx_desc_count =
251 adapter->max_jumbo_rx_desc_count;
252 rcv_desc->flags = RCV_DESC_JUMBO;
253 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
254 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
255 break;
256
257 case RCV_RING_LRO:
258 rcv_desc->max_rx_desc_count =
259 adapter->max_lro_rx_desc_count;
260 rcv_desc->flags = RCV_DESC_LRO;
261 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
262 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
263 break;
264
265 }
266 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
267 vmalloc(RCV_BUFFSIZE);
268
269 if (rcv_desc->rx_buf_arr == NULL) {
270 printk(KERN_ERR "%s: Could not allocate"
271 "rcv_desc->rx_buf_arr memory:%d\n",
272 netxen_nic_driver_name,
273 (int)RCV_BUFFSIZE);
274 err = -ENOMEM;
275 goto err_out_free_rx_buffer;
276 }
277 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
278 }
279
280 }
281
282 adapter->cmd_buf_arr = cmd_buf_arr;
283 adapter->ahw.pci_base0 = mem_ptr0;
284 adapter->ahw.pci_base1 = mem_ptr1;
285 adapter->ahw.pci_base2 = mem_ptr2;
286 adapter->ahw.db_base = db_ptr;
287 adapter->ahw.db_len = db_len;
288 spin_lock_init(&adapter->tx_lock);
289 spin_lock_init(&adapter->lock);
290 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
291 #ifdef CONFIG_IA64
292 netxen_pinit_from_rom(adapter, 0);
293 udelay(500);
294 netxen_load_firmware(adapter);
295 #endif
296
297 /*
298 * Set the CRB window to invalid. If any register in window 0 is
299 * accessed it should set the window to 0 and then reset it to 1.
300 */
301 adapter->curr_window = 255;
302 /*
303 * Adapter in our case is quad port so initialize it before
304 * initializing the ports
305 */
306 netxen_initialize_adapter_hw(adapter); /* initialize the adapter */
307
308 netxen_initialize_adapter_ops(adapter);
309
310 init_timer(&adapter->watchdog_timer);
311 adapter->ahw.xg_linkup = 0;
312 adapter->watchdog_timer.function = &netxen_watchdog;
313 adapter->watchdog_timer.data = (unsigned long)adapter;
314 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
315 adapter->ahw.pdev = pdev;
316 adapter->proc_cmd_buf_counter = 0;
317 adapter->ahw.revision_id = nx_p2_id;
318
319 if (pci_enable_msi(pdev)) {
320 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
321 printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
322 " error\n", netxen_nic_driver_name);
323 } else
324 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
325
326 if (netxen_is_flash_supported(adapter) == 0 &&
327 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
328 valid_mac = 1;
329 else
330 valid_mac = 0;
331
332 /*
333 * Initialize all the CRB registers here.
334 */
335 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
336 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
337 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
338
339 /* do this before waking up pegs so that we have valid dummy dma addr */
340 err = netxen_initialize_adapter_offload(adapter);
341 if (err) {
342 goto err_out_free_dev;
343 }
344
345 /* Unlock the HW, prompting the boot sequence */
346 writel(1,
347 NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
348
349 /* Handshake with the card before we register the devices. */
350 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
351
352 /* initialize the all the ports */
353 adapter->active_ports = 0;
354
355 for (i = 0; i < adapter->ahw.max_ports; i++) {
356 netdev = alloc_etherdev(sizeof(struct netxen_port));
357 if (!netdev) {
358 printk(KERN_ERR "%s: could not allocate netdev for port"
359 " %d\n", netxen_nic_driver_name, i + 1);
360 goto err_out_free_dev;
361 }
362
363 SET_MODULE_OWNER(netdev);
364 SET_NETDEV_DEV(netdev, &pdev->dev);
365
366 port = netdev_priv(netdev);
367 port->netdev = netdev;
368 port->pdev = pdev;
369 port->adapter = adapter;
370 port->portnum = i; /* Gigabit port number from 0-3 */
371
372 netdev->open = netxen_nic_open;
373 netdev->stop = netxen_nic_close;
374 netdev->hard_start_xmit = netxen_nic_xmit_frame;
375 netdev->get_stats = netxen_nic_get_stats;
376 netdev->set_multicast_list = netxen_nic_set_multi;
377 netdev->set_mac_address = netxen_nic_set_mac;
378 netdev->change_mtu = netxen_nic_change_mtu;
379 netdev->tx_timeout = netxen_tx_timeout;
380 netdev->watchdog_timeo = HZ;
381
382 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
383 netdev->poll = netxen_nic_poll;
384 netdev->weight = NETXEN_NETDEV_WEIGHT;
385 #ifdef CONFIG_NET_POLL_CONTROLLER
386 netdev->poll_controller = netxen_nic_poll_controller;
387 #endif
388 /* ScatterGather support */
389 netdev->features = NETIF_F_SG;
390 netdev->features |= NETIF_F_IP_CSUM;
391 netdev->features |= NETIF_F_TSO;
392
393 if (pci_using_dac)
394 netdev->features |= NETIF_F_HIGHDMA;
395
396 if (valid_mac) {
397 unsigned char *p = (unsigned char *)&mac_addr[i];
398 netdev->dev_addr[0] = *(p + 5);
399 netdev->dev_addr[1] = *(p + 4);
400 netdev->dev_addr[2] = *(p + 3);
401 netdev->dev_addr[3] = *(p + 2);
402 netdev->dev_addr[4] = *(p + 1);
403 netdev->dev_addr[5] = *(p + 0);
404
405 memcpy(netdev->perm_addr, netdev->dev_addr,
406 netdev->addr_len);
407 if (!is_valid_ether_addr(netdev->perm_addr)) {
408 printk(KERN_ERR "%s: Bad MAC address "
409 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
410 netxen_nic_driver_name,
411 netdev->dev_addr[0],
412 netdev->dev_addr[1],
413 netdev->dev_addr[2],
414 netdev->dev_addr[3],
415 netdev->dev_addr[4],
416 netdev->dev_addr[5]);
417 } else {
418 if (adapter->macaddr_set)
419 adapter->macaddr_set(port,
420 netdev->dev_addr);
421 }
422 }
423 INIT_WORK(&port->tx_timeout_task, netxen_tx_timeout_task);
424 netif_carrier_off(netdev);
425 netif_stop_queue(netdev);
426
427 if ((err = register_netdev(netdev))) {
428 printk(KERN_ERR "%s: register_netdev failed port #%d"
429 " aborting\n", netxen_nic_driver_name, i + 1);
430 err = -EIO;
431 free_netdev(netdev);
432 goto err_out_free_dev;
433 }
434 adapter->port_count++;
435 adapter->port[i] = port;
436 }
437 #ifndef CONFIG_PPC64
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 #endif
444 /*
445 * delay a while to ensure that the Pegs are up & running.
446 * Otherwise, we might see some flaky behaviour.
447 */
448 udelay(100);
449
450 switch (adapter->ahw.board_type) {
451 case NETXEN_NIC_GBE:
452 printk("%s: QUAD GbE board initialized\n",
453 netxen_nic_driver_name);
454 break;
455
456 case NETXEN_NIC_XGBE:
457 printk("%s: XGbE board initialized\n", netxen_nic_driver_name);
458 break;
459 }
460
461 adapter->driver_mismatch = 0;
462
463 return 0;
464
465 err_out_free_dev:
466 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
467 pci_disable_msi(pdev);
468 for (i = 0; i < adapter->port_count; i++) {
469 port = adapter->port[i];
470 if ((port) && (port->netdev)) {
471 unregister_netdev(port->netdev);
472 free_netdev(port->netdev);
473 }
474 }
475
476 netxen_free_adapter_offload(adapter);
477
478 err_out_free_rx_buffer:
479 for (i = 0; i < MAX_RCV_CTX; ++i) {
480 recv_ctx = &adapter->recv_ctx[i];
481 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
482 rcv_desc = &recv_ctx->rcv_desc[ring];
483 if (rcv_desc->rx_buf_arr != NULL) {
484 vfree(rcv_desc->rx_buf_arr);
485 rcv_desc->rx_buf_arr = NULL;
486 }
487 }
488 }
489 vfree(cmd_buf_arr);
490
491 err_out_free_adapter:
492 pci_set_drvdata(pdev, NULL);
493 kfree(adapter);
494
495 err_out_dbunmap:
496 if (db_ptr)
497 iounmap(db_ptr);
498
499 err_out_iounmap:
500 if (mem_ptr0)
501 iounmap(mem_ptr0);
502 if (mem_ptr1)
503 iounmap(mem_ptr1);
504 if (mem_ptr2)
505 iounmap(mem_ptr2);
506
507 err_out_free_res:
508 pci_release_regions(pdev);
509 err_out_disable_pdev:
510 pci_disable_device(pdev);
511 return err;
512 }
513
514 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
515 {
516 struct netxen_adapter *adapter;
517 struct netxen_port *port;
518 struct netxen_rx_buffer *buffer;
519 struct netxen_recv_context *recv_ctx;
520 struct netxen_rcv_desc_ctx *rcv_desc;
521 int i;
522 int ctxid, ring;
523
524 adapter = pci_get_drvdata(pdev);
525 if (adapter == NULL)
526 return;
527
528 netxen_nic_stop_all_ports(adapter);
529 /* leave the hw in the same state as reboot */
530 netxen_pinit_from_rom(adapter, 0);
531 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
532 netxen_load_firmware(adapter);
533 netxen_free_adapter_offload(adapter);
534
535 udelay(500); /* Delay for a while to drain the DMA engines */
536 for (i = 0; i < adapter->port_count; i++) {
537 port = adapter->port[i];
538 if ((port) && (port->netdev)) {
539 unregister_netdev(port->netdev);
540 free_netdev(port->netdev);
541 }
542 }
543
544 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
545 pci_disable_msi(pdev);
546 pci_set_drvdata(pdev, NULL);
547 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
548 netxen_free_hw_resources(adapter);
549
550 iounmap(adapter->ahw.db_base);
551 iounmap(adapter->ahw.pci_base0);
552 iounmap(adapter->ahw.pci_base1);
553 iounmap(adapter->ahw.pci_base2);
554
555 pci_release_regions(pdev);
556 pci_disable_device(pdev);
557
558 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
559 recv_ctx = &adapter->recv_ctx[ctxid];
560 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
561 rcv_desc = &recv_ctx->rcv_desc[ring];
562 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
563 buffer = &(rcv_desc->rx_buf_arr[i]);
564 if (buffer->state == NETXEN_BUFFER_FREE)
565 continue;
566 pci_unmap_single(pdev, buffer->dma,
567 rcv_desc->dma_size,
568 PCI_DMA_FROMDEVICE);
569 if (buffer->skb != NULL)
570 dev_kfree_skb_any(buffer->skb);
571 }
572 vfree(rcv_desc->rx_buf_arr);
573 }
574 }
575
576 vfree(adapter->cmd_buf_arr);
577 kfree(adapter);
578 }
579
580 /*
581 * Called when a network interface is made active
582 * @returns 0 on success, negative value on failure
583 */
584 static int netxen_nic_open(struct net_device *netdev)
585 {
586 struct netxen_port *port = netdev_priv(netdev);
587 struct netxen_adapter *adapter = port->adapter;
588 int err = 0;
589 int ctx, ring;
590
591 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
592 err = netxen_init_firmware(adapter);
593 if (err != 0) {
594 printk(KERN_ERR "Failed to init firmware\n");
595 return -EIO;
596 }
597 netxen_nic_flash_print(adapter);
598 if (adapter->init_niu)
599 adapter->init_niu(adapter);
600
601 /* setup all the resources for the Phantom... */
602 /* this include the descriptors for rcv, tx, and status */
603 netxen_nic_clear_stats(adapter);
604 err = netxen_nic_hw_resources(adapter);
605 if (err) {
606 printk(KERN_ERR "Error in setting hw resources:%d\n",
607 err);
608 return err;
609 }
610 if (adapter->init_port
611 && adapter->init_port(adapter, port->portnum) != 0) {
612 printk(KERN_ERR "%s: Failed to initialize port %d\n",
613 netxen_nic_driver_name, port->portnum);
614 netxen_free_hw_resources(adapter);
615 return -EIO;
616 }
617 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
618 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
619 netxen_post_rx_buffers(adapter, ctx, ring);
620 }
621 adapter->irq = adapter->ahw.pdev->irq;
622 err = request_irq(adapter->ahw.pdev->irq, &netxen_intr,
623 IRQF_SHARED | IRQF_SAMPLE_RANDOM,
624 netdev->name, adapter);
625 if (err) {
626 printk(KERN_ERR "request_irq failed with: %d\n", err);
627 netxen_free_hw_resources(adapter);
628 return err;
629 }
630
631 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
632 }
633 adapter->active_ports++;
634 if (adapter->active_ports == 1) {
635 if (!adapter->driver_mismatch)
636 mod_timer(&adapter->watchdog_timer, jiffies);
637
638 netxen_nic_enable_int(adapter);
639 }
640
641 /* Done here again so that even if phantom sw overwrote it,
642 * we set it */
643 if (adapter->macaddr_set)
644 adapter->macaddr_set(port, netdev->dev_addr);
645 netxen_nic_set_link_parameters(port);
646
647 netxen_nic_set_multi(netdev);
648 if (adapter->set_mtu)
649 adapter->set_mtu(port, netdev->mtu);
650
651 if (!adapter->driver_mismatch)
652 netif_start_queue(netdev);
653
654 return 0;
655 }
656
657 /*
658 * netxen_nic_close - Disables a network interface entry point
659 */
660 static int netxen_nic_close(struct net_device *netdev)
661 {
662 struct netxen_port *port = netdev_priv(netdev);
663 struct netxen_adapter *adapter = port->adapter;
664 int i, j;
665 struct netxen_cmd_buffer *cmd_buff;
666 struct netxen_skb_frag *buffrag;
667
668 netif_carrier_off(netdev);
669 netif_stop_queue(netdev);
670
671 adapter->active_ports--;
672
673 if (!adapter->active_ports) {
674 netxen_nic_disable_int(adapter);
675 if (adapter->irq)
676 free_irq(adapter->irq, 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 (((skb->nh.iph)->ihl * sizeof(u32)) +
783 ((skb->h.th)->doff * sizeof(u32)) +
784 sizeof(struct ethhdr) >
785 (sizeof(struct cmd_desc_type0) - 2)) {
786 no_of_desc++;
787 }
788 }
789 }
790 k = adapter->cmd_producer;
791 max_tx_desc_count = adapter->max_tx_desc_count;
792 last_cmd_consumer = adapter->last_cmd_consumer;
793 if ((k + no_of_desc) >=
794 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
795 last_cmd_consumer)) {
796 port->stats.nocmddescriptor++;
797 DPRINTK(ERR, "No command descriptors available,"
798 " producer = %d, consumer = %d count=%llu,"
799 " dropping packet\n", producer,
800 adapter->last_cmd_consumer,
801 port->stats.nocmddescriptor);
802
803 netif_stop_queue(netdev);
804 port->flags |= NETXEN_NETDEV_STATUS;
805 spin_unlock_bh(&adapter->tx_lock);
806 return NETDEV_TX_BUSY;
807 }
808 k = get_index_range(k, max_tx_desc_count, no_of_desc);
809 adapter->cmd_producer = k;
810 adapter->total_threads++;
811 adapter->num_threads++;
812
813 spin_unlock_bh(&adapter->tx_lock);
814 /* Copy the descriptors into the hardware */
815 producer = local_producer;
816 saved_producer = producer;
817 hwdesc = &hw->cmd_desc_head[producer];
818 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
819 /* Take skb->data itself */
820 pbuf = &adapter->cmd_buf_arr[producer];
821 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
822 pbuf->mss = skb_shinfo(skb)->gso_size;
823 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
824 } else {
825 pbuf->mss = 0;
826 hwdesc->mss = 0;
827 }
828 pbuf->total_length = skb->len;
829 pbuf->skb = skb;
830 pbuf->cmd = TX_ETHER_PKT;
831 pbuf->frag_count = frag_count;
832 pbuf->port = port->portnum;
833 buffrag = &pbuf->frag_array[0];
834 buffrag->dma = pci_map_single(port->pdev, skb->data, first_seg_len,
835 PCI_DMA_TODEVICE);
836 buffrag->length = first_seg_len;
837 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
838 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
839 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
840
841 netxen_set_cmd_desc_port(hwdesc, port->portnum);
842 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
843 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
844
845 for (i = 1, k = 1; i < frag_count; i++, k++) {
846 struct skb_frag_struct *frag;
847 int len, temp_len;
848 unsigned long offset;
849 dma_addr_t temp_dma;
850
851 /* move to next desc. if there is a need */
852 if ((i & 0x3) == 0) {
853 k = 0;
854 producer = get_next_index(producer,
855 adapter->max_tx_desc_count);
856 hwdesc = &hw->cmd_desc_head[producer];
857 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
858 }
859 frag = &skb_shinfo(skb)->frags[i - 1];
860 len = frag->size;
861 offset = frag->page_offset;
862
863 temp_len = len;
864 temp_dma = pci_map_page(port->pdev, frag->page, offset,
865 len, PCI_DMA_TODEVICE);
866
867 buffrag++;
868 buffrag->dma = temp_dma;
869 buffrag->length = temp_len;
870
871 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
872 switch (k) {
873 case 0:
874 hwdesc->buffer1_length = cpu_to_le16(temp_len);
875 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
876 break;
877 case 1:
878 hwdesc->buffer2_length = cpu_to_le16(temp_len);
879 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
880 break;
881 case 2:
882 hwdesc->buffer3_length = cpu_to_le16(temp_len);
883 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
884 break;
885 case 3:
886 hwdesc->buffer4_length = cpu_to_le16(temp_len);
887 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
888 break;
889 }
890 frag++;
891 }
892 producer = get_next_index(producer, adapter->max_tx_desc_count);
893
894 /* might change opcode to TX_TCP_LSO */
895 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
896
897 /* For LSO, we need to copy the MAC/IP/TCP headers into
898 * the descriptor ring
899 */
900 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
901 == TX_TCP_LSO) {
902 int hdr_len, first_hdr_len, more_hdr;
903 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
904 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
905 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
906 more_hdr = 1;
907 } else {
908 first_hdr_len = hdr_len;
909 more_hdr = 0;
910 }
911 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
912 hwdesc = &hw->cmd_desc_head[producer];
913
914 /* copy the first 64 bytes */
915 memcpy(((void *)hwdesc) + 2,
916 (void *)(skb->data), first_hdr_len);
917 producer = get_next_index(producer, max_tx_desc_count);
918
919 if (more_hdr) {
920 hwdesc = &hw->cmd_desc_head[producer];
921 /* copy the next 64 bytes - should be enough except
922 * for pathological case
923 */
924 memcpy((void *)hwdesc, (void *)(skb->data) +
925 first_hdr_len, hdr_len - first_hdr_len);
926 producer = get_next_index(producer, max_tx_desc_count);
927 }
928 }
929 spin_lock_bh(&adapter->tx_lock);
930 port->stats.txbytes +=
931 netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]);
932 /* Code to update the adapter considering how many producer threads
933 are currently working */
934 if ((--adapter->num_threads) == 0) {
935 /* This is the last thread */
936 u32 crb_producer = adapter->cmd_producer;
937 writel(crb_producer,
938 NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
939 wmb();
940 adapter->total_threads = 0;
941 }
942
943 port->stats.xmitfinished++;
944 spin_unlock_bh(&adapter->tx_lock);
945
946 netdev->trans_start = jiffies;
947
948 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
949
950 DPRINTK(INFO, "Done. Send\n");
951 return NETDEV_TX_OK;
952 }
953
954 static void netxen_watchdog(unsigned long v)
955 {
956 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
957
958 SCHEDULE_WORK(&adapter->watchdog_task);
959 }
960
961 static void netxen_tx_timeout(struct net_device *netdev)
962 {
963 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
964
965 SCHEDULE_WORK(&port->tx_timeout_task);
966 }
967
968 static void netxen_tx_timeout_task(struct work_struct *work)
969 {
970 struct netxen_port *port =
971 container_of(work, struct netxen_port, tx_timeout_task);
972 struct net_device *netdev = port->netdev;
973 unsigned long flags;
974
975 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
976 netxen_nic_driver_name, netdev->name);
977
978 spin_lock_irqsave(&port->adapter->lock, flags);
979 netxen_nic_close(netdev);
980 netxen_nic_open(netdev);
981 spin_unlock_irqrestore(&port->adapter->lock, flags);
982 netdev->trans_start = jiffies;
983 netif_wake_queue(netdev);
984 }
985
986 static int
987 netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
988 {
989 u32 ret = 0;
990
991 DPRINTK(INFO, "Entered handle ISR\n");
992
993 adapter->stats.ints++;
994
995 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
996 int count = 0;
997 u32 mask;
998 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
999 if ((mask & 0x80) == 0) {
1000 /* not our interrupt */
1001 return ret;
1002 }
1003 netxen_nic_disable_int(adapter);
1004 /* Window = 0 or 1 */
1005 do {
1006 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
1007 ISR_INT_TARGET_STATUS));
1008 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
1009 } while (((mask & 0x80) != 0) && (++count < 32));
1010 if ((mask & 0x80) != 0)
1011 printk("Could not disable interrupt completely\n");
1012
1013 }
1014 adapter->stats.hostints++;
1015
1016 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
1017 if (netif_rx_schedule_prep(netdev)) {
1018 /*
1019 * Interrupts are already disabled.
1020 */
1021 __netif_rx_schedule(netdev);
1022 } else {
1023 static unsigned int intcount = 0;
1024 if ((++intcount & 0xfff) == 0xfff)
1025 printk(KERN_ERR
1026 "%s: %s interrupt %d while in poll\n",
1027 netxen_nic_driver_name, netdev->name,
1028 intcount);
1029 }
1030 ret = 1;
1031 }
1032
1033 if (ret == 0) {
1034 netxen_nic_enable_int(adapter);
1035 }
1036
1037 return ret;
1038 }
1039
1040 /*
1041 * netxen_intr - Interrupt Handler
1042 * @irq: interrupt number
1043 * data points to adapter stucture (which may be handling more than 1 port
1044 */
1045 irqreturn_t netxen_intr(int irq, void *data)
1046 {
1047 struct netxen_adapter *adapter;
1048 struct netxen_port *port;
1049 struct net_device *netdev;
1050 int i;
1051
1052 if (unlikely(!irq)) {
1053 return IRQ_NONE; /* Not our interrupt */
1054 }
1055
1056 adapter = (struct netxen_adapter *)data;
1057 for (i = 0; i < adapter->ahw.max_ports; i++) {
1058 port = adapter->port[i];
1059 netdev = port->netdev;
1060
1061 /* process our status queue (for all 4 ports) */
1062 if (netif_running(netdev)) {
1063 netxen_handle_int(adapter, netdev);
1064 break;
1065 }
1066 }
1067
1068 return IRQ_HANDLED;
1069 }
1070
1071 static int netxen_nic_poll(struct net_device *netdev, int *budget)
1072 {
1073 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
1074 struct netxen_adapter *adapter = port->adapter;
1075 int work_to_do = min(*budget, netdev->quota);
1076 int done = 1;
1077 int ctx;
1078 int this_work_done;
1079 int work_done = 0;
1080
1081 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1082 port->stats.polled++;
1083
1084 work_done = 0;
1085 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1086 /*
1087 * Fairness issue. This will give undue weight to the
1088 * receive context 0.
1089 */
1090
1091 /*
1092 * To avoid starvation, we give each of our receivers,
1093 * a fraction of the quota. Sometimes, it might happen that we
1094 * have enough quota to process every packet, but since all the
1095 * packets are on one context, it gets only half of the quota,
1096 * and ends up not processing it.
1097 */
1098 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1099 work_to_do /
1100 MAX_RCV_CTX);
1101 work_done += this_work_done;
1102 }
1103
1104 netdev->quota -= work_done;
1105 *budget -= work_done;
1106
1107 if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0)
1108 done = 0;
1109
1110 if (netxen_process_cmd_ring((unsigned long)adapter) == 0)
1111 done = 0;
1112
1113 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1114 work_done, work_to_do);
1115 if (done) {
1116 netif_rx_complete(netdev);
1117 netxen_nic_enable_int(adapter);
1118 }
1119
1120 return !done;
1121 }
1122
1123 #ifdef CONFIG_NET_POLL_CONTROLLER
1124 static void netxen_nic_poll_controller(struct net_device *netdev)
1125 {
1126 struct netxen_port *port = netdev_priv(netdev);
1127 struct netxen_adapter *adapter = port->adapter;
1128 disable_irq(adapter->irq);
1129 netxen_intr(adapter->irq, adapter);
1130 enable_irq(adapter->irq);
1131 }
1132 #endif
1133
1134 static struct pci_driver netxen_driver = {
1135 .name = netxen_nic_driver_name,
1136 .id_table = netxen_pci_tbl,
1137 .probe = netxen_nic_probe,
1138 .remove = __devexit_p(netxen_nic_remove)
1139 };
1140
1141 /* Driver Registration on NetXen card */
1142
1143 static int __init netxen_init_module(void)
1144 {
1145 if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0)
1146 return -ENOMEM;
1147
1148 return pci_register_driver(&netxen_driver);
1149 }
1150
1151 module_init(netxen_init_module);
1152
1153 static void __exit netxen_exit_module(void)
1154 {
1155 /*
1156 * Wait for some time to allow the dma to drain, if any.
1157 */
1158 pci_unregister_driver(&netxen_driver);
1159 destroy_workqueue(netxen_workq);
1160 }
1161
1162 module_exit(netxen_exit_module);
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