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netxen: force link update across ifdown/ifup
[linux-2.6.git] / drivers / net / netxen / netxen_nic_main.c
blobf69807c9432b70b025467eded691e1e4aa7a2dd5
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 #include "netxen_nic_phan_reg.h"
40
41 #include <linux/dma-mapping.h>
42 #include <net/ip.h>
43
44 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
45 MODULE_LICENSE("GPL");
46 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
47
48 char netxen_nic_driver_name[] = "netxen_nic";
49 static char netxen_nic_driver_string[] = "NetXen Network Driver version "
50 NETXEN_NIC_LINUX_VERSIONID;
51
52 static int port_mode = NETXEN_PORT_MODE_AUTO_NEG;
53
54 /* Default to restricted 1G auto-neg mode */
55 static int wol_port_mode = 5;
56
57 static int use_msi = 1;
58
59 static int use_msi_x = 1;
60
61 /* Local functions to NetXen NIC driver */
62 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
63 const struct pci_device_id *ent);
64 static void __devexit netxen_nic_remove(struct pci_dev *pdev);
65 static int netxen_nic_open(struct net_device *netdev);
66 static int netxen_nic_close(struct net_device *netdev);
67 static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
68 static void netxen_tx_timeout(struct net_device *netdev);
69 static void netxen_tx_timeout_task(struct work_struct *work);
70 static void netxen_watchdog(unsigned long);
71 static int netxen_nic_poll(struct napi_struct *napi, int budget);
72 #ifdef CONFIG_NET_POLL_CONTROLLER
73 static void netxen_nic_poll_controller(struct net_device *netdev);
74 #endif
75 static irqreturn_t netxen_intr(int irq, void *data);
76 static irqreturn_t netxen_msi_intr(int irq, void *data);
77
78 /* PCI Device ID Table */
79 #define ENTRY(device) \
80 {PCI_DEVICE(0x4040, (device)), \
81 .class = PCI_CLASS_NETWORK_ETHERNET << 8, .class_mask = ~0}
82
83 static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
84 ENTRY(0x0001),
85 ENTRY(0x0002),
86 ENTRY(0x0003),
87 ENTRY(0x0004),
88 ENTRY(0x0005),
89 ENTRY(0x0024),
90 ENTRY(0x0025),
91 ENTRY(0x0100),
92 {0,}
93 };
94
95 MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
96
97 /*
98 * In netxen_nic_down(), we must wait for any pending callback requests into
99 * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
100 * reenabled right after it is deleted in netxen_nic_down().
101 * FLUSH_SCHEDULED_WORK() does this synchronization.
102 *
103 * Normally, schedule_work()/flush_scheduled_work() could have worked, but
104 * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
105 * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
106 * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
107 * linkwatch_event() to be executed which also attempts to acquire the rtnl
108 * lock thus causing a deadlock.
109 */
110
111 static struct workqueue_struct *netxen_workq;
112 #define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
113 #define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
114
115 static void netxen_watchdog(unsigned long);
116
117 static uint32_t crb_cmd_producer[4] = {
118 CRB_CMD_PRODUCER_OFFSET, CRB_CMD_PRODUCER_OFFSET_1,
119 CRB_CMD_PRODUCER_OFFSET_2, CRB_CMD_PRODUCER_OFFSET_3
120 };
121
122 void
123 netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
124 uint32_t crb_producer)
125 {
126 adapter->pci_write_normalize(adapter,
127 adapter->crb_addr_cmd_producer, crb_producer);
128 }
129
130 static uint32_t crb_cmd_consumer[4] = {
131 CRB_CMD_CONSUMER_OFFSET, CRB_CMD_CONSUMER_OFFSET_1,
132 CRB_CMD_CONSUMER_OFFSET_2, CRB_CMD_CONSUMER_OFFSET_3
133 };
134
135 static inline void
136 netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
137 u32 crb_consumer)
138 {
139 adapter->pci_write_normalize(adapter,
140 adapter->crb_addr_cmd_consumer, crb_consumer);
141 }
142
143 static uint32_t msi_tgt_status[8] = {
144 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
145 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3,
146 ISR_INT_TARGET_STATUS_F4, ISR_INT_TARGET_STATUS_F5,
147 ISR_INT_TARGET_STATUS_F6, ISR_INT_TARGET_STATUS_F7
148 };
149
150 static struct netxen_legacy_intr_set legacy_intr[] = NX_LEGACY_INTR_CONFIG;
151
152 static void netxen_nic_disable_int(struct netxen_adapter *adapter)
153 {
154 u32 mask = 0x7ff;
155 int retries = 32;
156 int pci_fn = adapter->ahw.pci_func;
157
158 if (adapter->msi_mode != MSI_MODE_MULTIFUNC)
159 adapter->pci_write_normalize(adapter,
160 adapter->crb_intr_mask, 0);
161
162 if (adapter->intr_scheme != -1 &&
163 adapter->intr_scheme != INTR_SCHEME_PERPORT)
164 adapter->pci_write_immediate(adapter, ISR_INT_MASK, mask);
165
166 if (!NETXEN_IS_MSI_FAMILY(adapter)) {
167 do {
168 adapter->pci_write_immediate(adapter,
169 adapter->legacy_intr.tgt_status_reg,
170 0xffffffff);
171 mask = adapter->pci_read_immediate(adapter,
172 ISR_INT_VECTOR);
173 if (!(mask & 0x80))
174 break;
175 udelay(10);
176 } while (--retries);
177
178 if (!retries) {
179 printk(KERN_NOTICE "%s: Failed to disable interrupt\n",
180 netxen_nic_driver_name);
181 }
182 } else {
183 if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
184 adapter->pci_write_immediate(adapter,
185 msi_tgt_status[pci_fn], 0xffffffff);
186 }
187 }
188 }
189
190 static void netxen_nic_enable_int(struct netxen_adapter *adapter)
191 {
192 u32 mask;
193
194 if (adapter->intr_scheme != -1 &&
195 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
196 switch (adapter->ahw.board_type) {
197 case NETXEN_NIC_GBE:
198 mask = 0x77b;
199 break;
200 case NETXEN_NIC_XGBE:
201 mask = 0x77f;
202 break;
203 default:
204 mask = 0x7ff;
205 break;
206 }
207
208 adapter->pci_write_immediate(adapter, ISR_INT_MASK, mask);
209 }
210
211 adapter->pci_write_normalize(adapter, adapter->crb_intr_mask, 0x1);
212
213 if (!NETXEN_IS_MSI_FAMILY(adapter)) {
214 mask = 0xbff;
215 if (adapter->intr_scheme == INTR_SCHEME_PERPORT)
216 adapter->pci_write_immediate(adapter,
217 adapter->legacy_intr.tgt_mask_reg, mask);
218 else
219 adapter->pci_write_normalize(adapter,
220 CRB_INT_VECTOR, 0);
221 }
222 }
223
224 static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
225 {
226 struct pci_dev *pdev = adapter->pdev;
227 int err;
228 uint64_t mask;
229
230 #ifdef CONFIG_IA64
231 adapter->dma_mask = DMA_32BIT_MASK;
232 #else
233 if (revision_id >= NX_P3_B0) {
234 /* should go to DMA_64BIT_MASK */
235 adapter->dma_mask = DMA_39BIT_MASK;
236 mask = DMA_39BIT_MASK;
237 } else if (revision_id == NX_P3_A2) {
238 adapter->dma_mask = DMA_39BIT_MASK;
239 mask = DMA_39BIT_MASK;
240 } else if (revision_id == NX_P2_C1) {
241 adapter->dma_mask = DMA_35BIT_MASK;
242 mask = DMA_35BIT_MASK;
243 } else {
244 adapter->dma_mask = DMA_32BIT_MASK;
245 mask = DMA_32BIT_MASK;
246 goto set_32_bit_mask;
247 }
248
249 /*
250 * Consistent DMA mask is set to 32 bit because it cannot be set to
251 * 35 bits. For P3 also leave it at 32 bits for now. Only the rings
252 * come off this pool.
253 */
254 if (pci_set_dma_mask(pdev, mask) == 0 &&
255 pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) == 0) {
256 adapter->pci_using_dac = 1;
257 return 0;
258 }
259 #endif /* CONFIG_IA64 */
260
261 set_32_bit_mask:
262 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
263 if (!err)
264 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
265 if (err) {
266 DPRINTK(ERR, "No usable DMA configuration, aborting:%d\n", err);
267 return err;
268 }
269
270 adapter->pci_using_dac = 0;
271 return 0;
272 }
273
274 static void netxen_check_options(struct netxen_adapter *adapter)
275 {
276 switch (adapter->ahw.boardcfg.board_type) {
277 case NETXEN_BRDTYPE_P3_HMEZ:
278 case NETXEN_BRDTYPE_P3_XG_LOM:
279 case NETXEN_BRDTYPE_P3_10G_CX4:
280 case NETXEN_BRDTYPE_P3_10G_CX4_LP:
281 case NETXEN_BRDTYPE_P3_IMEZ:
282 case NETXEN_BRDTYPE_P3_10G_SFP_PLUS:
283 case NETXEN_BRDTYPE_P3_10G_SFP_QT:
284 case NETXEN_BRDTYPE_P3_10G_SFP_CT:
285 case NETXEN_BRDTYPE_P3_10G_XFP:
286 case NETXEN_BRDTYPE_P3_10000_BASE_T:
287 adapter->msix_supported = !!use_msi_x;
288 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
289 break;
290
291 case NETXEN_BRDTYPE_P2_SB31_10G:
292 case NETXEN_BRDTYPE_P2_SB31_10G_CX4:
293 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
294 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
295 adapter->msix_supported = 0;
296 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
297 break;
298
299 case NETXEN_BRDTYPE_P3_REF_QG:
300 case NETXEN_BRDTYPE_P3_4_GB:
301 case NETXEN_BRDTYPE_P3_4_GB_MM:
302 adapter->msix_supported = 0;
303 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
304 break;
305
306 case NETXEN_BRDTYPE_P2_SB35_4G:
307 case NETXEN_BRDTYPE_P2_SB31_2G:
308 adapter->msix_supported = 0;
309 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
310 break;
311
312 default:
313 adapter->msix_supported = 0;
314 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
315
316 printk(KERN_WARNING "Unknown board type(0x%x)\n",
317 adapter->ahw.boardcfg.board_type);
318 break;
319 }
320
321 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
322 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
323 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
324
325 adapter->max_possible_rss_rings = 1;
326 return;
327 }
328
329 static int
330 netxen_check_hw_init(struct netxen_adapter *adapter, int first_boot)
331 {
332 int ret = 0;
333
334 if (first_boot == 0x55555555) {
335 /* This is the first boot after power up */
336
337 /* PCI bus master workaround */
338 adapter->hw_read_wx(adapter,
339 NETXEN_PCIE_REG(0x4), &first_boot, 4);
340 if (!(first_boot & 0x4)) {
341 first_boot |= 0x4;
342 adapter->hw_write_wx(adapter,
343 NETXEN_PCIE_REG(0x4), &first_boot, 4);
344 adapter->hw_read_wx(adapter,
345 NETXEN_PCIE_REG(0x4), &first_boot, 4);
346 }
347
348 /* This is the first boot after power up */
349 adapter->hw_read_wx(adapter,
350 NETXEN_ROMUSB_GLB_SW_RESET, &first_boot, 4);
351 if (first_boot != 0x80000f) {
352 /* clear the register for future unloads/loads */
353 adapter->pci_write_normalize(adapter,
354 NETXEN_CAM_RAM(0x1fc), 0);
355 ret = -1;
356 }
357
358 if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
359 /* Start P2 boot loader */
360 adapter->pci_write_normalize(adapter,
361 NETXEN_CAM_RAM(0x1fc), NETXEN_BDINFO_MAGIC);
362 adapter->pci_write_normalize(adapter,
363 NETXEN_ROMUSB_GLB_PEGTUNE_DONE, 1);
364 }
365 }
366 return ret;
367 }
368
369 static void netxen_set_port_mode(struct netxen_adapter *adapter)
370 {
371 u32 val, data;
372
373 val = adapter->ahw.boardcfg.board_type;
374 if ((val == NETXEN_BRDTYPE_P3_HMEZ) ||
375 (val == NETXEN_BRDTYPE_P3_XG_LOM)) {
376 if (port_mode == NETXEN_PORT_MODE_802_3_AP) {
377 data = NETXEN_PORT_MODE_802_3_AP;
378 adapter->hw_write_wx(adapter,
379 NETXEN_PORT_MODE_ADDR, &data, 4);
380 } else if (port_mode == NETXEN_PORT_MODE_XG) {
381 data = NETXEN_PORT_MODE_XG;
382 adapter->hw_write_wx(adapter,
383 NETXEN_PORT_MODE_ADDR, &data, 4);
384 } else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_1G) {
385 data = NETXEN_PORT_MODE_AUTO_NEG_1G;
386 adapter->hw_write_wx(adapter,
387 NETXEN_PORT_MODE_ADDR, &data, 4);
388 } else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_XG) {
389 data = NETXEN_PORT_MODE_AUTO_NEG_XG;
390 adapter->hw_write_wx(adapter,
391 NETXEN_PORT_MODE_ADDR, &data, 4);
392 } else {
393 data = NETXEN_PORT_MODE_AUTO_NEG;
394 adapter->hw_write_wx(adapter,
395 NETXEN_PORT_MODE_ADDR, &data, 4);
396 }
397
398 if ((wol_port_mode != NETXEN_PORT_MODE_802_3_AP) &&
399 (wol_port_mode != NETXEN_PORT_MODE_XG) &&
400 (wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_1G) &&
401 (wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_XG)) {
402 wol_port_mode = NETXEN_PORT_MODE_AUTO_NEG;
403 }
404 adapter->hw_write_wx(adapter, NETXEN_WOL_PORT_MODE,
405 &wol_port_mode, 4);
406 }
407 }
408
409 #define PCI_CAP_ID_GEN 0x10
410
411 static void netxen_pcie_strap_init(struct netxen_adapter *adapter)
412 {
413 u32 pdevfuncsave;
414 u32 c8c9value = 0;
415 u32 chicken = 0;
416 u32 control = 0;
417 int i, pos;
418 struct pci_dev *pdev;
419
420 pdev = pci_get_device(0x1166, 0x0140, NULL);
421 if (pdev) {
422 pci_dev_put(pdev);
423 adapter->hw_read_wx(adapter,
424 NETXEN_PCIE_REG(PCIE_TGT_SPLIT_CHICKEN), &chicken, 4);
425 chicken |= 0x4000;
426 adapter->hw_write_wx(adapter,
427 NETXEN_PCIE_REG(PCIE_TGT_SPLIT_CHICKEN), &chicken, 4);
428 }
429
430 pdev = adapter->pdev;
431
432 adapter->hw_read_wx(adapter,
433 NETXEN_PCIE_REG(PCIE_CHICKEN3), &chicken, 4);
434 /* clear chicken3.25:24 */
435 chicken &= 0xFCFFFFFF;
436 /*
437 * if gen1 and B0, set F1020 - if gen 2, do nothing
438 * if gen2 set to F1000
439 */
440 pos = pci_find_capability(pdev, PCI_CAP_ID_GEN);
441 if (pos == 0xC0) {
442 pci_read_config_dword(pdev, pos + 0x10, &control);
443 if ((control & 0x000F0000) != 0x00020000) {
444 /* set chicken3.24 if gen1 */
445 chicken |= 0x01000000;
446 }
447 printk(KERN_INFO "%s Gen2 strapping detected\n",
448 netxen_nic_driver_name);
449 c8c9value = 0xF1000;
450 } else {
451 /* set chicken3.24 if gen1 */
452 chicken |= 0x01000000;
453 printk(KERN_INFO "%s Gen1 strapping detected\n",
454 netxen_nic_driver_name);
455 if (adapter->ahw.revision_id == NX_P3_B0)
456 c8c9value = 0xF1020;
457 else
458 c8c9value = 0;
459
460 }
461 adapter->hw_write_wx(adapter,
462 NETXEN_PCIE_REG(PCIE_CHICKEN3), &chicken, 4);
463
464 if (!c8c9value)
465 return;
466
467 pdevfuncsave = pdev->devfn;
468 if (pdevfuncsave & 0x07)
469 return;
470
471 for (i = 0; i < 8; i++) {
472 pci_read_config_dword(pdev, pos + 8, &control);
473 pci_read_config_dword(pdev, pos + 8, &control);
474 pci_write_config_dword(pdev, pos + 8, c8c9value);
475 pdev->devfn++;
476 }
477 pdev->devfn = pdevfuncsave;
478 }
479
480 static void netxen_set_msix_bit(struct pci_dev *pdev, int enable)
481 {
482 u32 control;
483 int pos;
484
485 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
486 if (pos) {
487 pci_read_config_dword(pdev, pos, &control);
488 if (enable)
489 control |= PCI_MSIX_FLAGS_ENABLE;
490 else
491 control = 0;
492 pci_write_config_dword(pdev, pos, control);
493 }
494 }
495
496 static void netxen_init_msix_entries(struct netxen_adapter *adapter)
497 {
498 int i;
499
500 for (i = 0; i < MSIX_ENTRIES_PER_ADAPTER; i++)
501 adapter->msix_entries[i].entry = i;
502 }
503
504 static int
505 netxen_read_mac_addr(struct netxen_adapter *adapter)
506 {
507 int i;
508 unsigned char *p;
509 __le64 mac_addr;
510 DECLARE_MAC_BUF(mac);
511 struct net_device *netdev = adapter->netdev;
512 struct pci_dev *pdev = adapter->pdev;
513
514 if (netxen_is_flash_supported(adapter) != 0)
515 return -EIO;
516
517 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
518 if (netxen_p3_get_mac_addr(adapter, &mac_addr) != 0)
519 return -EIO;
520 } else {
521 if (netxen_get_flash_mac_addr(adapter, &mac_addr) != 0)
522 return -EIO;
523 }
524
525 p = (unsigned char *)&mac_addr;
526 for (i = 0; i < 6; i++)
527 netdev->dev_addr[i] = *(p + 5 - i);
528
529 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
530
531 /* set station address */
532
533 if (!is_valid_ether_addr(netdev->perm_addr)) {
534 dev_warn(&pdev->dev, "Bad MAC address %s.\n",
535 print_mac(mac, netdev->dev_addr));
536 } else
537 adapter->macaddr_set(adapter, netdev->dev_addr);
538
539 return 0;
540 }
541
542 /*
543 * netxen_nic_probe()
544 *
545 * The Linux system will invoke this after identifying the vendor ID and
546 * device Id in the pci_tbl supported by this module.
547 *
548 * A quad port card has one operational PCI config space, (function 0),
549 * which is used to access all four ports.
550 *
551 * This routine will initialize the adapter, and setup the global parameters
552 * along with the port's specific structure.
553 */
554 static int __devinit
555 netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
556 {
557 struct net_device *netdev = NULL;
558 struct netxen_adapter *adapter = NULL;
559 void __iomem *mem_ptr0 = NULL;
560 void __iomem *mem_ptr1 = NULL;
561 void __iomem *mem_ptr2 = NULL;
562 unsigned long first_page_group_end;
563 unsigned long first_page_group_start;
564
565
566 u8 __iomem *db_ptr = NULL;
567 unsigned long mem_base, mem_len, db_base, db_len, pci_len0 = 0;
568 int i = 0, err;
569 int first_driver, first_boot;
570 u32 val;
571 int pci_func_id = PCI_FUNC(pdev->devfn);
572 struct netxen_legacy_intr_set *legacy_intrp;
573 uint8_t revision_id;
574
575 if (pci_func_id == 0)
576 printk(KERN_INFO "%s\n", netxen_nic_driver_string);
577
578 if (pdev->class != 0x020000) {
579 printk(KERN_DEBUG "NetXen function %d, class %x will not "
580 "be enabled.\n",pci_func_id, pdev->class);
581 return -ENODEV;
582 }
583
584 if ((err = pci_enable_device(pdev)))
585 return err;
586
587 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
588 err = -ENODEV;
589 goto err_out_disable_pdev;
590 }
591
592 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
593 goto err_out_disable_pdev;
594
595 pci_set_master(pdev);
596
597 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
598 if(!netdev) {
599 printk(KERN_ERR"%s: Failed to allocate memory for the "
600 "device block.Check system memory resource"
601 " usage.\n", netxen_nic_driver_name);
602 goto err_out_free_res;
603 }
604
605 SET_NETDEV_DEV(netdev, &pdev->dev);
606
607 adapter = netdev->priv;
608 adapter->netdev = netdev;
609 adapter->pdev = pdev;
610 adapter->ahw.pci_func = pci_func_id;
611
612 revision_id = pdev->revision;
613 adapter->ahw.revision_id = revision_id;
614
615 err = nx_set_dma_mask(adapter, revision_id);
616 if (err)
617 goto err_out_free_netdev;
618
619 rwlock_init(&adapter->adapter_lock);
620 adapter->ahw.qdr_sn_window = -1;
621 adapter->ahw.ddr_mn_window = -1;
622
623 /* remap phys address */
624 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
625 mem_len = pci_resource_len(pdev, 0);
626 pci_len0 = 0;
627
628 adapter->hw_write_wx = netxen_nic_hw_write_wx_128M;
629 adapter->hw_read_wx = netxen_nic_hw_read_wx_128M;
630 adapter->pci_read_immediate = netxen_nic_pci_read_immediate_128M;
631 adapter->pci_write_immediate = netxen_nic_pci_write_immediate_128M;
632 adapter->pci_read_normalize = netxen_nic_pci_read_normalize_128M;
633 adapter->pci_write_normalize = netxen_nic_pci_write_normalize_128M;
634 adapter->pci_set_window = netxen_nic_pci_set_window_128M;
635 adapter->pci_mem_read = netxen_nic_pci_mem_read_128M;
636 adapter->pci_mem_write = netxen_nic_pci_mem_write_128M;
637
638 /* 128 Meg of memory */
639 if (mem_len == NETXEN_PCI_128MB_SIZE) {
640 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
641 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
642 SECOND_PAGE_GROUP_SIZE);
643 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
644 THIRD_PAGE_GROUP_SIZE);
645 first_page_group_start = FIRST_PAGE_GROUP_START;
646 first_page_group_end = FIRST_PAGE_GROUP_END;
647 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
648 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
649 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
650 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
651 first_page_group_start = 0;
652 first_page_group_end = 0;
653 } else if (mem_len == NETXEN_PCI_2MB_SIZE) {
654 adapter->hw_write_wx = netxen_nic_hw_write_wx_2M;
655 adapter->hw_read_wx = netxen_nic_hw_read_wx_2M;
656 adapter->pci_read_immediate = netxen_nic_pci_read_immediate_2M;
657 adapter->pci_write_immediate =
658 netxen_nic_pci_write_immediate_2M;
659 adapter->pci_read_normalize = netxen_nic_pci_read_normalize_2M;
660 adapter->pci_write_normalize =
661 netxen_nic_pci_write_normalize_2M;
662 adapter->pci_set_window = netxen_nic_pci_set_window_2M;
663 adapter->pci_mem_read = netxen_nic_pci_mem_read_2M;
664 adapter->pci_mem_write = netxen_nic_pci_mem_write_2M;
665
666 mem_ptr0 = ioremap(mem_base, mem_len);
667 pci_len0 = mem_len;
668 first_page_group_start = 0;
669 first_page_group_end = 0;
670
671 adapter->ahw.ddr_mn_window = 0;
672 adapter->ahw.qdr_sn_window = 0;
673
674 adapter->ahw.mn_win_crb = 0x100000 + PCIX_MN_WINDOW +
675 (pci_func_id * 0x20);
676 adapter->ahw.ms_win_crb = 0x100000 + PCIX_SN_WINDOW;
677 if (pci_func_id < 4)
678 adapter->ahw.ms_win_crb += (pci_func_id * 0x20);
679 else
680 adapter->ahw.ms_win_crb +=
681 0xA0 + ((pci_func_id - 4) * 0x10);
682 } else {
683 err = -EIO;
684 goto err_out_free_netdev;
685 }
686
687 dev_info(&pdev->dev, "%dMB memory map\n", (int)(mem_len>>20));
688
689 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
690 db_len = pci_resource_len(pdev, 4);
691
692 if (db_len == 0) {
693 printk(KERN_ERR "%s: doorbell is disabled\n",
694 netxen_nic_driver_name);
695 err = -EIO;
696 goto err_out_iounmap;
697 }
698 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
699 db_len);
700
701 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
702 if (!db_ptr) {
703 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
704 netxen_nic_driver_name);
705 err = -EIO;
706 goto err_out_iounmap;
707 }
708 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
709
710 adapter->ahw.pci_base0 = mem_ptr0;
711 adapter->ahw.pci_len0 = pci_len0;
712 adapter->ahw.first_page_group_start = first_page_group_start;
713 adapter->ahw.first_page_group_end = first_page_group_end;
714 adapter->ahw.pci_base1 = mem_ptr1;
715 adapter->ahw.pci_base2 = mem_ptr2;
716 adapter->ahw.db_base = db_ptr;
717 adapter->ahw.db_len = db_len;
718
719 netif_napi_add(netdev, &adapter->napi,
720 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
721
722 if (revision_id >= NX_P3_B0)
723 legacy_intrp = &legacy_intr[pci_func_id];
724 else
725 legacy_intrp = &legacy_intr[0];
726
727 adapter->legacy_intr.int_vec_bit = legacy_intrp->int_vec_bit;
728 adapter->legacy_intr.tgt_status_reg = legacy_intrp->tgt_status_reg;
729 adapter->legacy_intr.tgt_mask_reg = legacy_intrp->tgt_mask_reg;
730 adapter->legacy_intr.pci_int_reg = legacy_intrp->pci_int_reg;
731
732 /* this will be read from FW later */
733 adapter->intr_scheme = -1;
734 adapter->msi_mode = -1;
735
736 /* This will be reset for mezz cards */
737 adapter->portnum = pci_func_id;
738 adapter->status &= ~NETXEN_NETDEV_STATUS;
739 adapter->rx_csum = 1;
740 adapter->mc_enabled = 0;
741 if (NX_IS_REVISION_P3(revision_id))
742 adapter->max_mc_count = 38;
743 else
744 adapter->max_mc_count = 16;
745
746 netdev->open = netxen_nic_open;
747 netdev->stop = netxen_nic_close;
748 netdev->hard_start_xmit = netxen_nic_xmit_frame;
749 netdev->get_stats = netxen_nic_get_stats;
750 if (NX_IS_REVISION_P3(revision_id))
751 netdev->set_multicast_list = netxen_p3_nic_set_multi;
752 else
753 netdev->set_multicast_list = netxen_p2_nic_set_multi;
754 netdev->set_mac_address = netxen_nic_set_mac;
755 netdev->change_mtu = netxen_nic_change_mtu;
756 netdev->tx_timeout = netxen_tx_timeout;
757 netdev->watchdog_timeo = 2*HZ;
758
759 netxen_nic_change_mtu(netdev, netdev->mtu);
760
761 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
762 #ifdef CONFIG_NET_POLL_CONTROLLER
763 netdev->poll_controller = netxen_nic_poll_controller;
764 #endif
765 /* ScatterGather support */
766 netdev->features = NETIF_F_SG;
767 netdev->features |= NETIF_F_IP_CSUM;
768 netdev->features |= NETIF_F_TSO;
769 if (NX_IS_REVISION_P3(revision_id)) {
770 netdev->features |= NETIF_F_IPV6_CSUM;
771 netdev->features |= NETIF_F_TSO6;
772 }
773
774 if (adapter->pci_using_dac)
775 netdev->features |= NETIF_F_HIGHDMA;
776
777 /*
778 * Set the CRB window to invalid. If any register in window 0 is
779 * accessed it should set the window to 0 and then reset it to 1.
780 */
781 adapter->curr_window = 255;
782
783 if (netxen_nic_get_board_info(adapter) != 0) {
784 printk("%s: Error getting board config info.\n",
785 netxen_nic_driver_name);
786 err = -EIO;
787 goto err_out_iounmap;
788 }
789
790 netxen_initialize_adapter_ops(adapter);
791
792 /* Mezz cards have PCI function 0,2,3 enabled */
793 switch (adapter->ahw.boardcfg.board_type) {
794 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
795 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
796 if (pci_func_id >= 2)
797 adapter->portnum = pci_func_id - 2;
798 break;
799 default:
800 break;
801 }
802
803 /*
804 * This call will setup various max rx/tx counts.
805 * It must be done before any buffer/ring allocations.
806 */
807 netxen_check_options(adapter);
808
809 first_driver = 0;
810 if (NX_IS_REVISION_P3(revision_id)) {
811 if (adapter->ahw.pci_func == 0)
812 first_driver = 1;
813 } else {
814 if (adapter->portnum == 0)
815 first_driver = 1;
816 }
817
818 if (first_driver) {
819 first_boot = adapter->pci_read_normalize(adapter,
820 NETXEN_CAM_RAM(0x1fc));
821
822 err = netxen_check_hw_init(adapter, first_boot);
823 if (err) {
824 printk(KERN_ERR "%s: error in init HW init sequence\n",
825 netxen_nic_driver_name);
826 goto err_out_iounmap;
827 }
828
829 if (NX_IS_REVISION_P3(revision_id))
830 netxen_set_port_mode(adapter);
831
832 if (first_boot != 0x55555555) {
833 adapter->pci_write_normalize(adapter,
834 CRB_CMDPEG_STATE, 0);
835 netxen_pinit_from_rom(adapter, 0);
836 msleep(1);
837 netxen_load_firmware(adapter);
838 }
839
840 if (NX_IS_REVISION_P3(revision_id))
841 netxen_pcie_strap_init(adapter);
842
843 if (NX_IS_REVISION_P2(revision_id)) {
844
845 /* Initialize multicast addr pool owners */
846 val = 0x7654;
847 if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
848 val |= 0x0f000000;
849 netxen_crb_writelit_adapter(adapter,
850 NETXEN_MAC_ADDR_CNTL_REG, val);
851
852 }
853
854 if ((first_boot == 0x55555555) &&
855 (NX_IS_REVISION_P2(revision_id))) {
856 /* Unlock the HW, prompting the boot sequence */
857 adapter->pci_write_normalize(adapter,
858 NETXEN_ROMUSB_GLB_PEGTUNE_DONE, 1);
859 }
860
861 err = netxen_initialize_adapter_offload(adapter);
862 if (err)
863 goto err_out_iounmap;
864
865 /*
866 * Tell the hardware our version number.
867 */
868 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
869 | ((_NETXEN_NIC_LINUX_MINOR << 8))
870 | (_NETXEN_NIC_LINUX_SUBVERSION);
871 adapter->pci_write_normalize(adapter, CRB_DRIVER_VERSION, i);
872
873 /* Handshake with the card before we register the devices. */
874 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
875
876 } /* first_driver */
877
878 netxen_nic_flash_print(adapter);
879
880 if (NX_IS_REVISION_P3(revision_id)) {
881 adapter->hw_read_wx(adapter,
882 NETXEN_MIU_MN_CONTROL, &val, 4);
883 adapter->ahw.cut_through = (val & 0x4) ? 1 : 0;
884 dev_info(&pdev->dev, "firmware running in %s mode\n",
885 adapter->ahw.cut_through ? "cut through" : "legacy");
886 }
887
888 /*
889 * See if the firmware gave us a virtual-physical port mapping.
890 */
891 adapter->physical_port = adapter->portnum;
892 i = adapter->pci_read_normalize(adapter, CRB_V2P(adapter->portnum));
893 if (i != 0x55555555)
894 adapter->physical_port = i;
895
896 adapter->flags &= ~(NETXEN_NIC_MSI_ENABLED | NETXEN_NIC_MSIX_ENABLED);
897
898 netxen_set_msix_bit(pdev, 0);
899
900 if (NX_IS_REVISION_P3(revision_id)) {
901 if ((mem_len != NETXEN_PCI_128MB_SIZE) &&
902 mem_len != NETXEN_PCI_2MB_SIZE)
903 adapter->msix_supported = 0;
904 }
905
906 if (adapter->msix_supported) {
907
908 netxen_init_msix_entries(adapter);
909
910 if (pci_enable_msix(pdev, adapter->msix_entries,
911 MSIX_ENTRIES_PER_ADAPTER))
912 goto request_msi;
913
914 adapter->flags |= NETXEN_NIC_MSIX_ENABLED;
915 netxen_set_msix_bit(pdev, 1);
916 dev_info(&pdev->dev, "using msi-x interrupts\n");
917
918 } else {
919 request_msi:
920 if (use_msi && !pci_enable_msi(pdev)) {
921 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
922 dev_info(&pdev->dev, "using msi interrupts\n");
923 } else
924 dev_info(&pdev->dev, "using legacy interrupts\n");
925 }
926
927 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
928 netdev->irq = adapter->msix_entries[0].vector;
929 else
930 netdev->irq = pdev->irq;
931
932 err = netxen_receive_peg_ready(adapter);
933 if (err)
934 goto err_out_disable_msi;
935
936 init_timer(&adapter->watchdog_timer);
937 adapter->watchdog_timer.function = &netxen_watchdog;
938 adapter->watchdog_timer.data = (unsigned long)adapter;
939 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
940 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
941
942 err = netxen_read_mac_addr(adapter);
943 if (err)
944 dev_warn(&pdev->dev, "failed to read mac addr\n");
945
946 netif_carrier_off(netdev);
947 netif_stop_queue(netdev);
948
949 if ((err = register_netdev(netdev))) {
950 printk(KERN_ERR "%s: register_netdev failed port #%d"
951 " aborting\n", netxen_nic_driver_name,
952 adapter->portnum);
953 err = -EIO;
954 goto err_out_disable_msi;
955 }
956
957 pci_set_drvdata(pdev, adapter);
958
959 switch (adapter->ahw.board_type) {
960 case NETXEN_NIC_GBE:
961 dev_info(&adapter->pdev->dev, "%s: GbE port initialized\n",
962 adapter->netdev->name);
963 break;
964 case NETXEN_NIC_XGBE:
965 dev_info(&adapter->pdev->dev, "%s: XGbE port initialized\n",
966 adapter->netdev->name);
967 break;
968 }
969
970 return 0;
971
972 err_out_disable_msi:
973 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
974 pci_disable_msix(pdev);
975 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
976 pci_disable_msi(pdev);
977
978 if (first_driver)
979 netxen_free_adapter_offload(adapter);
980
981 err_out_iounmap:
982 if (db_ptr)
983 iounmap(db_ptr);
984
985 if (mem_ptr0)
986 iounmap(mem_ptr0);
987 if (mem_ptr1)
988 iounmap(mem_ptr1);
989 if (mem_ptr2)
990 iounmap(mem_ptr2);
991
992 err_out_free_netdev:
993 free_netdev(netdev);
994
995 err_out_free_res:
996 pci_release_regions(pdev);
997
998 err_out_disable_pdev:
999 pci_set_drvdata(pdev, NULL);
1000 pci_disable_device(pdev);
1001 return err;
1002 }
1003
1004 static void __devexit netxen_nic_remove(struct pci_dev *pdev)
1005 {
1006 struct netxen_adapter *adapter;
1007 struct net_device *netdev;
1008
1009 adapter = pci_get_drvdata(pdev);
1010 if (adapter == NULL)
1011 return;
1012
1013 netdev = adapter->netdev;
1014
1015 unregister_netdev(netdev);
1016
1017 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
1018 netxen_free_hw_resources(adapter);
1019 netxen_release_rx_buffers(adapter);
1020 netxen_free_sw_resources(adapter);
1021 }
1022
1023 if (adapter->portnum == 0)
1024 netxen_free_adapter_offload(adapter);
1025
1026 if (adapter->irq)
1027 free_irq(adapter->irq, adapter);
1028
1029 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
1030 pci_disable_msix(pdev);
1031 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
1032 pci_disable_msi(pdev);
1033
1034 iounmap(adapter->ahw.db_base);
1035 iounmap(adapter->ahw.pci_base0);
1036 iounmap(adapter->ahw.pci_base1);
1037 iounmap(adapter->ahw.pci_base2);
1038
1039 pci_release_regions(pdev);
1040 pci_disable_device(pdev);
1041 pci_set_drvdata(pdev, NULL);
1042
1043 free_netdev(netdev);
1044 }
1045
1046 /*
1047 * Called when a network interface is made active
1048 * @returns 0 on success, negative value on failure
1049 */
1050 static int netxen_nic_open(struct net_device *netdev)
1051 {
1052 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
1053 int err = 0;
1054 int ctx, ring;
1055 irq_handler_t handler;
1056 unsigned long flags = IRQF_SAMPLE_RANDOM;
1057
1058 if (adapter->driver_mismatch)
1059 return -EIO;
1060
1061 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
1062 err = netxen_init_firmware(adapter);
1063 if (err != 0) {
1064 printk(KERN_ERR "Failed to init firmware\n");
1065 return -EIO;
1066 }
1067
1068 if (adapter->fw_major < 4)
1069 adapter->max_rds_rings = 3;
1070 else
1071 adapter->max_rds_rings = 2;
1072
1073 err = netxen_alloc_sw_resources(adapter);
1074 if (err) {
1075 printk(KERN_ERR "%s: Error in setting sw resources\n",
1076 netdev->name);
1077 return err;
1078 }
1079
1080 netxen_nic_clear_stats(adapter);
1081
1082 err = netxen_alloc_hw_resources(adapter);
1083 if (err) {
1084 printk(KERN_ERR "%s: Error in setting hw resources\n",
1085 netdev->name);
1086 goto err_out_free_sw;
1087 }
1088
1089 if (adapter->fw_major < 4) {
1090 adapter->crb_addr_cmd_producer =
1091 crb_cmd_producer[adapter->portnum];
1092 adapter->crb_addr_cmd_consumer =
1093 crb_cmd_consumer[adapter->portnum];
1094
1095 netxen_nic_update_cmd_producer(adapter, 0);
1096 netxen_nic_update_cmd_consumer(adapter, 0);
1097 }
1098
1099 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1100 for (ring = 0; ring < adapter->max_rds_rings; ring++)
1101 netxen_post_rx_buffers(adapter, ctx, ring);
1102 }
1103 if (NETXEN_IS_MSI_FAMILY(adapter))
1104 handler = netxen_msi_intr;
1105 else {
1106 flags |= IRQF_SHARED;
1107 handler = netxen_intr;
1108 }
1109 adapter->irq = netdev->irq;
1110 err = request_irq(adapter->irq, handler,
1111 flags, netdev->name, adapter);
1112 if (err) {
1113 printk(KERN_ERR "request_irq failed with: %d\n", err);
1114 goto err_out_free_rxbuf;
1115 }
1116
1117 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
1118 }
1119
1120 /* Done here again so that even if phantom sw overwrote it,
1121 * we set it */
1122 err = adapter->init_port(adapter, adapter->physical_port);
1123 if (err) {
1124 printk(KERN_ERR "%s: Failed to initialize port %d\n",
1125 netxen_nic_driver_name, adapter->portnum);
1126 goto err_out_free_irq;
1127 }
1128 adapter->macaddr_set(adapter, netdev->dev_addr);
1129
1130 netxen_nic_set_link_parameters(adapter);
1131
1132 netdev->set_multicast_list(netdev);
1133 if (adapter->set_mtu)
1134 adapter->set_mtu(adapter, netdev->mtu);
1135
1136 adapter->ahw.linkup = 0;
1137 mod_timer(&adapter->watchdog_timer, jiffies);
1138
1139 napi_enable(&adapter->napi);
1140 netxen_nic_enable_int(adapter);
1141
1142 netif_start_queue(netdev);
1143
1144 return 0;
1145
1146 err_out_free_irq:
1147 free_irq(adapter->irq, adapter);
1148 err_out_free_rxbuf:
1149 netxen_release_rx_buffers(adapter);
1150 netxen_free_hw_resources(adapter);
1151 err_out_free_sw:
1152 netxen_free_sw_resources(adapter);
1153 return err;
1154 }
1155
1156 /*
1157 * netxen_nic_close - Disables a network interface entry point
1158 */
1159 static int netxen_nic_close(struct net_device *netdev)
1160 {
1161 struct netxen_adapter *adapter = netdev_priv(netdev);
1162
1163 netif_carrier_off(netdev);
1164 netif_stop_queue(netdev);
1165 napi_disable(&adapter->napi);
1166
1167 if (adapter->stop_port)
1168 adapter->stop_port(adapter);
1169
1170 netxen_nic_disable_int(adapter);
1171
1172 netxen_release_tx_buffers(adapter);
1173
1174 FLUSH_SCHEDULED_WORK();
1175 del_timer_sync(&adapter->watchdog_timer);
1176
1177 return 0;
1178 }
1179
1180 void netxen_tso_check(struct netxen_adapter *adapter,
1181 struct cmd_desc_type0 *desc, struct sk_buff *skb)
1182 {
1183 if (desc->mss) {
1184 desc->total_hdr_length = (sizeof(struct ethhdr) +
1185 ip_hdrlen(skb) + tcp_hdrlen(skb));
1186
1187 if ((NX_IS_REVISION_P3(adapter->ahw.revision_id)) &&
1188 (skb->protocol == htons(ETH_P_IPV6)))
1189 netxen_set_cmd_desc_opcode(desc, TX_TCP_LSO6);
1190 else
1191 netxen_set_cmd_desc_opcode(desc, TX_TCP_LSO);
1192
1193 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
1194 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1195 netxen_set_cmd_desc_opcode(desc, TX_TCP_PKT);
1196 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1197 netxen_set_cmd_desc_opcode(desc, TX_UDP_PKT);
1198 else
1199 return;
1200 }
1201 desc->tcp_hdr_offset = skb_transport_offset(skb);
1202 desc->ip_hdr_offset = skb_network_offset(skb);
1203 }
1204
1205 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1206 {
1207 struct netxen_adapter *adapter = netdev_priv(netdev);
1208 struct netxen_hardware_context *hw = &adapter->ahw;
1209 unsigned int first_seg_len = skb->len - skb->data_len;
1210 struct netxen_skb_frag *buffrag;
1211 unsigned int i;
1212
1213 u32 producer, consumer;
1214 u32 saved_producer = 0;
1215 struct cmd_desc_type0 *hwdesc;
1216 int k;
1217 struct netxen_cmd_buffer *pbuf = NULL;
1218 int frag_count;
1219 int no_of_desc;
1220 u32 num_txd = adapter->max_tx_desc_count;
1221
1222 frag_count = skb_shinfo(skb)->nr_frags + 1;
1223
1224 /* There 4 fragments per descriptor */
1225 no_of_desc = (frag_count + 3) >> 2;
1226 if (netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1227 if (skb_shinfo(skb)->gso_size > 0) {
1228
1229 no_of_desc++;
1230 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
1231 sizeof(struct ethhdr)) >
1232 (sizeof(struct cmd_desc_type0) - 2)) {
1233 no_of_desc++;
1234 }
1235 }
1236 }
1237
1238 producer = adapter->cmd_producer;
1239 smp_mb();
1240 consumer = adapter->last_cmd_consumer;
1241 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
1242 netif_stop_queue(netdev);
1243 smp_mb();
1244 return NETDEV_TX_BUSY;
1245 }
1246
1247 /* Copy the descriptors into the hardware */
1248 saved_producer = producer;
1249 hwdesc = &hw->cmd_desc_head[producer];
1250 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1251 /* Take skb->data itself */
1252 pbuf = &adapter->cmd_buf_arr[producer];
1253 if ((netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
1254 skb_shinfo(skb)->gso_size > 0) {
1255 pbuf->mss = skb_shinfo(skb)->gso_size;
1256 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
1257 } else {
1258 pbuf->mss = 0;
1259 hwdesc->mss = 0;
1260 }
1261 pbuf->total_length = skb->len;
1262 pbuf->skb = skb;
1263 pbuf->cmd = TX_ETHER_PKT;
1264 pbuf->frag_count = frag_count;
1265 pbuf->port = adapter->portnum;
1266 buffrag = &pbuf->frag_array[0];
1267 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
1268 PCI_DMA_TODEVICE);
1269 buffrag->length = first_seg_len;
1270 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
1271 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
1272 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
1273
1274 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
1275 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
1276 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1277 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1278
1279 for (i = 1, k = 1; i < frag_count; i++, k++) {
1280 struct skb_frag_struct *frag;
1281 int len, temp_len;
1282 unsigned long offset;
1283 dma_addr_t temp_dma;
1284
1285 /* move to next desc. if there is a need */
1286 if ((i & 0x3) == 0) {
1287 k = 0;
1288 producer = get_next_index(producer, num_txd);
1289 hwdesc = &hw->cmd_desc_head[producer];
1290 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1291 pbuf = &adapter->cmd_buf_arr[producer];
1292 pbuf->skb = NULL;
1293 }
1294 frag = &skb_shinfo(skb)->frags[i - 1];
1295 len = frag->size;
1296 offset = frag->page_offset;
1297
1298 temp_len = len;
1299 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
1300 len, PCI_DMA_TODEVICE);
1301
1302 buffrag++;
1303 buffrag->dma = temp_dma;
1304 buffrag->length = temp_len;
1305
1306 switch (k) {
1307 case 0:
1308 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1309 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1310 break;
1311 case 1:
1312 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1313 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1314 break;
1315 case 2:
1316 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1317 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1318 break;
1319 case 3:
1320 hwdesc->buffer4_length = cpu_to_le16(temp_len);
1321 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1322 break;
1323 }
1324 frag++;
1325 }
1326 producer = get_next_index(producer, num_txd);
1327
1328 /* might change opcode to TX_TCP_LSO */
1329 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1330
1331 /* For LSO, we need to copy the MAC/IP/TCP headers into
1332 * the descriptor ring
1333 */
1334 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1335 == TX_TCP_LSO) {
1336 int hdr_len, first_hdr_len, more_hdr;
1337 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1338 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1339 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
1340 more_hdr = 1;
1341 } else {
1342 first_hdr_len = hdr_len;
1343 more_hdr = 0;
1344 }
1345 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1346 hwdesc = &hw->cmd_desc_head[producer];
1347 pbuf = &adapter->cmd_buf_arr[producer];
1348 pbuf->skb = NULL;
1349
1350 /* copy the first 64 bytes */
1351 memcpy(((void *)hwdesc) + 2,
1352 (void *)(skb->data), first_hdr_len);
1353 producer = get_next_index(producer, num_txd);
1354
1355 if (more_hdr) {
1356 hwdesc = &hw->cmd_desc_head[producer];
1357 pbuf = &adapter->cmd_buf_arr[producer];
1358 pbuf->skb = NULL;
1359 /* copy the next 64 bytes - should be enough except
1360 * for pathological case
1361 */
1362 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1363 hwdesc,
1364 (hdr_len -
1365 first_hdr_len));
1366 producer = get_next_index(producer, num_txd);
1367 }
1368 }
1369
1370 adapter->cmd_producer = producer;
1371 adapter->stats.txbytes += skb->len;
1372
1373 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
1374
1375 adapter->stats.xmitcalled++;
1376 netdev->trans_start = jiffies;
1377
1378 return NETDEV_TX_OK;
1379 }
1380
1381 static int netxen_nic_check_temp(struct netxen_adapter *adapter)
1382 {
1383 struct net_device *netdev = adapter->netdev;
1384 uint32_t temp, temp_state, temp_val;
1385 int rv = 0;
1386
1387 temp = adapter->pci_read_normalize(adapter, CRB_TEMP_STATE);
1388
1389 temp_state = nx_get_temp_state(temp);
1390 temp_val = nx_get_temp_val(temp);
1391
1392 if (temp_state == NX_TEMP_PANIC) {
1393 printk(KERN_ALERT
1394 "%s: Device temperature %d degrees C exceeds"
1395 " maximum allowed. Hardware has been shut down.\n",
1396 netxen_nic_driver_name, temp_val);
1397
1398 netif_carrier_off(netdev);
1399 netif_stop_queue(netdev);
1400 rv = 1;
1401 } else if (temp_state == NX_TEMP_WARN) {
1402 if (adapter->temp == NX_TEMP_NORMAL) {
1403 printk(KERN_ALERT
1404 "%s: Device temperature %d degrees C "
1405 "exceeds operating range."
1406 " Immediate action needed.\n",
1407 netxen_nic_driver_name, temp_val);
1408 }
1409 } else {
1410 if (adapter->temp == NX_TEMP_WARN) {
1411 printk(KERN_INFO
1412 "%s: Device temperature is now %d degrees C"
1413 " in normal range.\n", netxen_nic_driver_name,
1414 temp_val);
1415 }
1416 }
1417 adapter->temp = temp_state;
1418 return rv;
1419 }
1420
1421 static void netxen_nic_handle_phy_intr(struct netxen_adapter *adapter)
1422 {
1423 struct net_device *netdev = adapter->netdev;
1424 u32 val, port, linkup;
1425
1426 port = adapter->physical_port;
1427
1428 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
1429 val = adapter->pci_read_normalize(adapter, CRB_XG_STATE_P3);
1430 val = XG_LINK_STATE_P3(adapter->ahw.pci_func, val);
1431 linkup = (val == XG_LINK_UP_P3);
1432 } else {
1433 val = adapter->pci_read_normalize(adapter, CRB_XG_STATE);
1434 if (adapter->ahw.board_type == NETXEN_NIC_GBE)
1435 linkup = (val >> port) & 1;
1436 else {
1437 val = (val >> port*8) & 0xff;
1438 linkup = (val == XG_LINK_UP);
1439 }
1440 }
1441
1442 if (adapter->ahw.linkup && !linkup) {
1443 printk(KERN_INFO "%s: %s NIC Link is down\n",
1444 netxen_nic_driver_name, netdev->name);
1445 adapter->ahw.linkup = 0;
1446 if (netif_running(netdev)) {
1447 netif_carrier_off(netdev);
1448 netif_stop_queue(netdev);
1449 }
1450 } else if (!adapter->ahw.linkup && linkup) {
1451 printk(KERN_INFO "%s: %s NIC Link is up\n",
1452 netxen_nic_driver_name, netdev->name);
1453 adapter->ahw.linkup = 1;
1454 if (netif_running(netdev)) {
1455 netif_carrier_on(netdev);
1456 netif_wake_queue(netdev);
1457 }
1458 }
1459 }
1460
1461 static void netxen_watchdog(unsigned long v)
1462 {
1463 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1464
1465 SCHEDULE_WORK(&adapter->watchdog_task);
1466 }
1467
1468 void netxen_watchdog_task(struct work_struct *work)
1469 {
1470 struct netxen_adapter *adapter =
1471 container_of(work, struct netxen_adapter, watchdog_task);
1472
1473 if ((adapter->portnum == 0) && netxen_nic_check_temp(adapter))
1474 return;
1475
1476 netxen_nic_handle_phy_intr(adapter);
1477
1478 if (netif_running(adapter->netdev))
1479 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1480 }
1481
1482 static void netxen_tx_timeout(struct net_device *netdev)
1483 {
1484 struct netxen_adapter *adapter = (struct netxen_adapter *)
1485 netdev_priv(netdev);
1486 SCHEDULE_WORK(&adapter->tx_timeout_task);
1487 }
1488
1489 static void netxen_tx_timeout_task(struct work_struct *work)
1490 {
1491 struct netxen_adapter *adapter =
1492 container_of(work, struct netxen_adapter, tx_timeout_task);
1493
1494 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1495 netxen_nic_driver_name, adapter->netdev->name);
1496
1497 netxen_nic_disable_int(adapter);
1498 napi_disable(&adapter->napi);
1499
1500 adapter->netdev->trans_start = jiffies;
1501
1502 napi_enable(&adapter->napi);
1503 netxen_nic_enable_int(adapter);
1504 netif_wake_queue(adapter->netdev);
1505 }
1506
1507 /*
1508 * netxen_nic_get_stats - Get System Network Statistics
1509 * @netdev: network interface device structure
1510 */
1511 struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev)
1512 {
1513 struct netxen_adapter *adapter = netdev_priv(netdev);
1514 struct net_device_stats *stats = &adapter->net_stats;
1515
1516 memset(stats, 0, sizeof(*stats));
1517
1518 /* total packets received */
1519 stats->rx_packets = adapter->stats.no_rcv;
1520 /* total packets transmitted */
1521 stats->tx_packets = adapter->stats.xmitedframes +
1522 adapter->stats.xmitfinished;
1523 /* total bytes received */
1524 stats->rx_bytes = adapter->stats.rxbytes;
1525 /* total bytes transmitted */
1526 stats->tx_bytes = adapter->stats.txbytes;
1527 /* bad packets received */
1528 stats->rx_errors = adapter->stats.rcvdbadskb;
1529 /* packet transmit problems */
1530 stats->tx_errors = adapter->stats.nocmddescriptor;
1531 /* no space in linux buffers */
1532 stats->rx_dropped = adapter->stats.rxdropped;
1533 /* no space available in linux */
1534 stats->tx_dropped = adapter->stats.txdropped;
1535
1536 return stats;
1537 }
1538
1539 static inline void
1540 netxen_handle_int(struct netxen_adapter *adapter)
1541 {
1542 netxen_nic_disable_int(adapter);
1543 napi_schedule(&adapter->napi);
1544 }
1545
1546 static irqreturn_t netxen_intr(int irq, void *data)
1547 {
1548 struct netxen_adapter *adapter = data;
1549 u32 our_int = 0;
1550
1551 u32 status = 0;
1552
1553 status = adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1554
1555 if (!(status & adapter->legacy_intr.int_vec_bit))
1556 return IRQ_NONE;
1557
1558 if (adapter->ahw.revision_id >= NX_P3_B1) {
1559 /* check interrupt state machine, to be sure */
1560 status = adapter->pci_read_immediate(adapter,
1561 ISR_INT_STATE_REG);
1562 if (!ISR_LEGACY_INT_TRIGGERED(status))
1563 return IRQ_NONE;
1564
1565 } else if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
1566
1567 our_int = adapter->pci_read_normalize(adapter, CRB_INT_VECTOR);
1568 /* not our interrupt */
1569 if ((our_int & (0x80 << adapter->portnum)) == 0)
1570 return IRQ_NONE;
1571
1572 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1573 /* claim interrupt */
1574 adapter->pci_write_normalize(adapter,
1575 CRB_INT_VECTOR,
1576 our_int & ~((u32)(0x80 << adapter->portnum)));
1577 }
1578 }
1579
1580 netxen_handle_int(adapter);
1581
1582 return IRQ_HANDLED;
1583 }
1584
1585 static irqreturn_t netxen_msi_intr(int irq, void *data)
1586 {
1587 struct netxen_adapter *adapter = data;
1588
1589 netxen_handle_int(adapter);
1590 return IRQ_HANDLED;
1591 }
1592
1593 static int netxen_nic_poll(struct napi_struct *napi, int budget)
1594 {
1595 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
1596 int tx_complete;
1597 int ctx;
1598 int work_done;
1599
1600 tx_complete = netxen_process_cmd_ring(adapter);
1601
1602 work_done = 0;
1603 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1604 /*
1605 * Fairness issue. This will give undue weight to the
1606 * receive context 0.
1607 */
1608
1609 /*
1610 * To avoid starvation, we give each of our receivers,
1611 * a fraction of the quota. Sometimes, it might happen that we
1612 * have enough quota to process every packet, but since all the
1613 * packets are on one context, it gets only half of the quota,
1614 * and ends up not processing it.
1615 */
1616 work_done += netxen_process_rcv_ring(adapter, ctx,
1617 budget / MAX_RCV_CTX);
1618 }
1619
1620 if ((work_done < budget) && tx_complete) {
1621 netif_rx_complete(adapter->netdev, &adapter->napi);
1622 netxen_nic_enable_int(adapter);
1623 }
1624
1625 return work_done;
1626 }
1627
1628 #ifdef CONFIG_NET_POLL_CONTROLLER
1629 static void netxen_nic_poll_controller(struct net_device *netdev)
1630 {
1631 struct netxen_adapter *adapter = netdev_priv(netdev);
1632 disable_irq(adapter->irq);
1633 netxen_intr(adapter->irq, adapter);
1634 enable_irq(adapter->irq);
1635 }
1636 #endif
1637
1638 static struct pci_driver netxen_driver = {
1639 .name = netxen_nic_driver_name,
1640 .id_table = netxen_pci_tbl,
1641 .probe = netxen_nic_probe,
1642 .remove = __devexit_p(netxen_nic_remove)
1643 };
1644
1645 /* Driver Registration on NetXen card */
1646
1647 static int __init netxen_init_module(void)
1648 {
1649 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
1650 return -ENOMEM;
1651
1652 return pci_register_driver(&netxen_driver);
1653 }
1654
1655 module_init(netxen_init_module);
1656
1657 static void __exit netxen_exit_module(void)
1658 {
1659 pci_unregister_driver(&netxen_driver);
1660 destroy_workqueue(netxen_workq);
1661 }
1662
1663 module_exit(netxen_exit_module);
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