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RT-AC66 3.0.0.4.374.130 core
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / net / ixgb / ixgb_main.c
blob991c8833e23c955f02cff9562c2973fbbfe1c205
1 /*******************************************************************************
2
3 Intel PRO/10GbE Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27 *******************************************************************************/
28
29 #include "ixgb.h"
30
31 char ixgb_driver_name[] = "ixgb";
32 static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
33
34 #ifndef CONFIG_IXGB_NAPI
35 #define DRIVERNAPI
36 #else
37 #define DRIVERNAPI "-NAPI"
38 #endif
39 #define DRV_VERSION "1.0.126-k2"DRIVERNAPI
40 char ixgb_driver_version[] = DRV_VERSION;
41 static char ixgb_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
42
43 /* ixgb_pci_tbl - PCI Device ID Table
44 *
45 * Wildcard entries (PCI_ANY_ID) should come last
46 * Last entry must be all 0s
47 *
48 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
49 * Class, Class Mask, private data (not used) }
50 */
51 static struct pci_device_id ixgb_pci_tbl[] = {
52 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
53 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
54 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
55 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
56 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
57 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
58 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
59 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
60
61 /* required last entry */
62 {0,}
63 };
64
65 MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
66
67 /* Local Function Prototypes */
68
69 int ixgb_up(struct ixgb_adapter *adapter);
70 void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog);
71 void ixgb_reset(struct ixgb_adapter *adapter);
72 int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
73 int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
74 void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
75 void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
76 void ixgb_update_stats(struct ixgb_adapter *adapter);
77
78 static int ixgb_init_module(void);
79 static void ixgb_exit_module(void);
80 static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
81 static void __devexit ixgb_remove(struct pci_dev *pdev);
82 static int ixgb_sw_init(struct ixgb_adapter *adapter);
83 static int ixgb_open(struct net_device *netdev);
84 static int ixgb_close(struct net_device *netdev);
85 static void ixgb_configure_tx(struct ixgb_adapter *adapter);
86 static void ixgb_configure_rx(struct ixgb_adapter *adapter);
87 static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
88 static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
89 static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
90 static void ixgb_set_multi(struct net_device *netdev);
91 static void ixgb_watchdog(unsigned long data);
92 static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
93 static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
94 static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
95 static int ixgb_set_mac(struct net_device *netdev, void *p);
96 static irqreturn_t ixgb_intr(int irq, void *data);
97 static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
98
99 #ifdef CONFIG_IXGB_NAPI
100 static int ixgb_clean(struct net_device *netdev, int *budget);
101 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter,
102 int *work_done, int work_to_do);
103 #else
104 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter);
105 #endif
106 static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter);
107 void ixgb_set_ethtool_ops(struct net_device *netdev);
108 static void ixgb_tx_timeout(struct net_device *dev);
109 static void ixgb_tx_timeout_task(struct work_struct *work);
110 static void ixgb_vlan_rx_register(struct net_device *netdev,
111 struct vlan_group *grp);
112 static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
113 static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
114 static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
115
116 #ifdef CONFIG_NET_POLL_CONTROLLER
117 /* for netdump / net console */
118 static void ixgb_netpoll(struct net_device *dev);
119 #endif
120
121 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
122 enum pci_channel_state state);
123 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
124 static void ixgb_io_resume (struct pci_dev *pdev);
125
126 /* Exported from other modules */
127 extern void ixgb_check_options(struct ixgb_adapter *adapter);
128
129 static struct pci_error_handlers ixgb_err_handler = {
130 .error_detected = ixgb_io_error_detected,
131 .slot_reset = ixgb_io_slot_reset,
132 .resume = ixgb_io_resume,
133 };
134
135 static struct pci_driver ixgb_driver = {
136 .name = ixgb_driver_name,
137 .id_table = ixgb_pci_tbl,
138 .probe = ixgb_probe,
139 .remove = __devexit_p(ixgb_remove),
140 .err_handler = &ixgb_err_handler
141 };
142
143 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
144 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
145 MODULE_LICENSE("GPL");
146 MODULE_VERSION(DRV_VERSION);
147
148 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
149 static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
150 module_param(debug, int, 0);
151 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
152
153 /* some defines for controlling descriptor fetches in h/w */
154 #define RXDCTL_WTHRESH_DEFAULT 15 /* chip writes back at this many or RXT0 */
155 #define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
156 * this */
157 #define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
158 * is pushed this many descriptors
159 * from head */
160
161 /**
162 * ixgb_init_module - Driver Registration Routine
163 *
164 * ixgb_init_module is the first routine called when the driver is
165 * loaded. All it does is register with the PCI subsystem.
166 **/
167
168 static int __init
169 ixgb_init_module(void)
170 {
171 printk(KERN_INFO "%s - version %s\n",
172 ixgb_driver_string, ixgb_driver_version);
173
174 printk(KERN_INFO "%s\n", ixgb_copyright);
175
176 return pci_register_driver(&ixgb_driver);
177 }
178
179 module_init(ixgb_init_module);
180
181 /**
182 * ixgb_exit_module - Driver Exit Cleanup Routine
183 *
184 * ixgb_exit_module is called just before the driver is removed
185 * from memory.
186 **/
187
188 static void __exit
189 ixgb_exit_module(void)
190 {
191 pci_unregister_driver(&ixgb_driver);
192 }
193
194 module_exit(ixgb_exit_module);
195
196 /**
197 * ixgb_irq_disable - Mask off interrupt generation on the NIC
198 * @adapter: board private structure
199 **/
200
201 static void
202 ixgb_irq_disable(struct ixgb_adapter *adapter)
203 {
204 atomic_inc(&adapter->irq_sem);
205 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
206 IXGB_WRITE_FLUSH(&adapter->hw);
207 synchronize_irq(adapter->pdev->irq);
208 }
209
210 /**
211 * ixgb_irq_enable - Enable default interrupt generation settings
212 * @adapter: board private structure
213 **/
214
215 static void
216 ixgb_irq_enable(struct ixgb_adapter *adapter)
217 {
218 if(atomic_dec_and_test(&adapter->irq_sem)) {
219 IXGB_WRITE_REG(&adapter->hw, IMS,
220 IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW |
221 IXGB_INT_LSC);
222 IXGB_WRITE_FLUSH(&adapter->hw);
223 }
224 }
225
226 int
227 ixgb_up(struct ixgb_adapter *adapter)
228 {
229 struct net_device *netdev = adapter->netdev;
230 int err, irq_flags = IRQF_SHARED;
231 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
232 struct ixgb_hw *hw = &adapter->hw;
233
234 /* hardware has been reset, we need to reload some things */
235
236 ixgb_rar_set(hw, netdev->dev_addr, 0);
237 ixgb_set_multi(netdev);
238
239 ixgb_restore_vlan(adapter);
240
241 ixgb_configure_tx(adapter);
242 ixgb_setup_rctl(adapter);
243 ixgb_configure_rx(adapter);
244 ixgb_alloc_rx_buffers(adapter);
245
246 /* disable interrupts and get the hardware into a known state */
247 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
248
249 /* only enable MSI if bus is in PCI-X mode */
250 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
251 err = pci_enable_msi(adapter->pdev);
252 if (!err) {
253 adapter->have_msi = 1;
254 irq_flags = 0;
255 }
256 /* proceed to try to request regular interrupt */
257 }
258
259 err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
260 netdev->name, netdev);
261 if (err) {
262 if (adapter->have_msi)
263 pci_disable_msi(adapter->pdev);
264 DPRINTK(PROBE, ERR,
265 "Unable to allocate interrupt Error: %d\n", err);
266 return err;
267 }
268
269 if((hw->max_frame_size != max_frame) ||
270 (hw->max_frame_size !=
271 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
272
273 hw->max_frame_size = max_frame;
274
275 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
276
277 if(hw->max_frame_size >
278 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
279 uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0);
280
281 if(!(ctrl0 & IXGB_CTRL0_JFE)) {
282 ctrl0 |= IXGB_CTRL0_JFE;
283 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
284 }
285 }
286 }
287
288 mod_timer(&adapter->watchdog_timer, jiffies);
289
290 #ifdef CONFIG_IXGB_NAPI
291 netif_poll_enable(netdev);
292 #endif
293 ixgb_irq_enable(adapter);
294
295 return 0;
296 }
297
298 void
299 ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog)
300 {
301 struct net_device *netdev = adapter->netdev;
302
303 ixgb_irq_disable(adapter);
304 free_irq(adapter->pdev->irq, netdev);
305
306 if (adapter->have_msi)
307 pci_disable_msi(adapter->pdev);
308
309 if(kill_watchdog)
310 del_timer_sync(&adapter->watchdog_timer);
311 #ifdef CONFIG_IXGB_NAPI
312 netif_poll_disable(netdev);
313 #endif
314 adapter->link_speed = 0;
315 adapter->link_duplex = 0;
316 netif_carrier_off(netdev);
317 netif_stop_queue(netdev);
318
319 ixgb_reset(adapter);
320 ixgb_clean_tx_ring(adapter);
321 ixgb_clean_rx_ring(adapter);
322 }
323
324 void
325 ixgb_reset(struct ixgb_adapter *adapter)
326 {
327
328 ixgb_adapter_stop(&adapter->hw);
329 if(!ixgb_init_hw(&adapter->hw))
330 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
331 }
332
333 /**
334 * ixgb_probe - Device Initialization Routine
335 * @pdev: PCI device information struct
336 * @ent: entry in ixgb_pci_tbl
337 *
338 * Returns 0 on success, negative on failure
339 *
340 * ixgb_probe initializes an adapter identified by a pci_dev structure.
341 * The OS initialization, configuring of the adapter private structure,
342 * and a hardware reset occur.
343 **/
344
345 static int __devinit
346 ixgb_probe(struct pci_dev *pdev,
347 const struct pci_device_id *ent)
348 {
349 struct net_device *netdev = NULL;
350 struct ixgb_adapter *adapter;
351 static int cards_found = 0;
352 unsigned long mmio_start;
353 int mmio_len;
354 int pci_using_dac;
355 int i;
356 int err;
357
358 if((err = pci_enable_device(pdev)))
359 return err;
360
361 if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
362 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
363 pci_using_dac = 1;
364 } else {
365 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
366 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
367 printk(KERN_ERR
368 "ixgb: No usable DMA configuration, aborting\n");
369 goto err_dma_mask;
370 }
371 pci_using_dac = 0;
372 }
373
374 if((err = pci_request_regions(pdev, ixgb_driver_name)))
375 goto err_request_regions;
376
377 pci_set_master(pdev);
378
379 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
380 if(!netdev) {
381 err = -ENOMEM;
382 goto err_alloc_etherdev;
383 }
384
385 SET_MODULE_OWNER(netdev);
386 SET_NETDEV_DEV(netdev, &pdev->dev);
387
388 pci_set_drvdata(pdev, netdev);
389 adapter = netdev_priv(netdev);
390 adapter->netdev = netdev;
391 adapter->pdev = pdev;
392 adapter->hw.back = adapter;
393 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
394
395 mmio_start = pci_resource_start(pdev, BAR_0);
396 mmio_len = pci_resource_len(pdev, BAR_0);
397
398 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
399 if(!adapter->hw.hw_addr) {
400 err = -EIO;
401 goto err_ioremap;
402 }
403
404 for(i = BAR_1; i <= BAR_5; i++) {
405 if(pci_resource_len(pdev, i) == 0)
406 continue;
407 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
408 adapter->hw.io_base = pci_resource_start(pdev, i);
409 break;
410 }
411 }
412
413 netdev->open = &ixgb_open;
414 netdev->stop = &ixgb_close;
415 netdev->hard_start_xmit = &ixgb_xmit_frame;
416 netdev->get_stats = &ixgb_get_stats;
417 netdev->set_multicast_list = &ixgb_set_multi;
418 netdev->set_mac_address = &ixgb_set_mac;
419 netdev->change_mtu = &ixgb_change_mtu;
420 ixgb_set_ethtool_ops(netdev);
421 netdev->tx_timeout = &ixgb_tx_timeout;
422 netdev->watchdog_timeo = 5 * HZ;
423 #ifdef CONFIG_IXGB_NAPI
424 netdev->poll = &ixgb_clean;
425 netdev->weight = 64;
426 #endif
427 netdev->vlan_rx_register = ixgb_vlan_rx_register;
428 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
429 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
430 #ifdef CONFIG_NET_POLL_CONTROLLER
431 netdev->poll_controller = ixgb_netpoll;
432 #endif
433
434 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
435 netdev->mem_start = mmio_start;
436 netdev->mem_end = mmio_start + mmio_len;
437 netdev->base_addr = adapter->hw.io_base;
438
439 adapter->bd_number = cards_found;
440 adapter->link_speed = 0;
441 adapter->link_duplex = 0;
442
443 /* setup the private structure */
444
445 if((err = ixgb_sw_init(adapter)))
446 goto err_sw_init;
447
448 netdev->features = NETIF_F_SG |
449 NETIF_F_HW_CSUM |
450 NETIF_F_HW_VLAN_TX |
451 NETIF_F_HW_VLAN_RX |
452 NETIF_F_HW_VLAN_FILTER;
453 netdev->features |= NETIF_F_TSO;
454 #ifdef NETIF_F_LLTX
455 netdev->features |= NETIF_F_LLTX;
456 #endif
457
458 if(pci_using_dac)
459 netdev->features |= NETIF_F_HIGHDMA;
460
461 /* make sure the EEPROM is good */
462
463 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
464 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
465 err = -EIO;
466 goto err_eeprom;
467 }
468
469 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
470 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
471
472 if(!is_valid_ether_addr(netdev->perm_addr)) {
473 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
474 err = -EIO;
475 goto err_eeprom;
476 }
477
478 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
479
480 init_timer(&adapter->watchdog_timer);
481 adapter->watchdog_timer.function = &ixgb_watchdog;
482 adapter->watchdog_timer.data = (unsigned long)adapter;
483
484 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
485
486 strcpy(netdev->name, "eth%d");
487 if((err = register_netdev(netdev)))
488 goto err_register;
489
490 /* we're going to reset, so assume we have no link for now */
491
492 netif_carrier_off(netdev);
493 netif_stop_queue(netdev);
494
495 DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
496 ixgb_check_options(adapter);
497 /* reset the hardware with the new settings */
498
499 ixgb_reset(adapter);
500
501 cards_found++;
502 return 0;
503
504 err_register:
505 err_sw_init:
506 err_eeprom:
507 iounmap(adapter->hw.hw_addr);
508 err_ioremap:
509 free_netdev(netdev);
510 err_alloc_etherdev:
511 pci_release_regions(pdev);
512 err_request_regions:
513 err_dma_mask:
514 pci_disable_device(pdev);
515 return err;
516 }
517
518 /**
519 * ixgb_remove - Device Removal Routine
520 * @pdev: PCI device information struct
521 *
522 * ixgb_remove is called by the PCI subsystem to alert the driver
523 * that it should release a PCI device. The could be caused by a
524 * Hot-Plug event, or because the driver is going to be removed from
525 * memory.
526 **/
527
528 static void __devexit
529 ixgb_remove(struct pci_dev *pdev)
530 {
531 struct net_device *netdev = pci_get_drvdata(pdev);
532 struct ixgb_adapter *adapter = netdev_priv(netdev);
533
534 unregister_netdev(netdev);
535
536 iounmap(adapter->hw.hw_addr);
537 pci_release_regions(pdev);
538
539 free_netdev(netdev);
540 }
541
542 /**
543 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
544 * @adapter: board private structure to initialize
545 *
546 * ixgb_sw_init initializes the Adapter private data structure.
547 * Fields are initialized based on PCI device information and
548 * OS network device settings (MTU size).
549 **/
550
551 static int __devinit
552 ixgb_sw_init(struct ixgb_adapter *adapter)
553 {
554 struct ixgb_hw *hw = &adapter->hw;
555 struct net_device *netdev = adapter->netdev;
556 struct pci_dev *pdev = adapter->pdev;
557
558 /* PCI config space info */
559
560 hw->vendor_id = pdev->vendor;
561 hw->device_id = pdev->device;
562 hw->subsystem_vendor_id = pdev->subsystem_vendor;
563 hw->subsystem_id = pdev->subsystem_device;
564
565 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
566 adapter->rx_buffer_len = hw->max_frame_size;
567
568 if((hw->device_id == IXGB_DEVICE_ID_82597EX)
569 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
570 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
571 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
572 hw->mac_type = ixgb_82597;
573 else {
574 /* should never have loaded on this device */
575 DPRINTK(PROBE, ERR, "unsupported device id\n");
576 }
577
578 /* enable flow control to be programmed */
579 hw->fc.send_xon = 1;
580
581 atomic_set(&adapter->irq_sem, 1);
582 spin_lock_init(&adapter->tx_lock);
583
584 return 0;
585 }
586
587 /**
588 * ixgb_open - Called when a network interface is made active
589 * @netdev: network interface device structure
590 *
591 * Returns 0 on success, negative value on failure
592 *
593 * The open entry point is called when a network interface is made
594 * active by the system (IFF_UP). At this point all resources needed
595 * for transmit and receive operations are allocated, the interrupt
596 * handler is registered with the OS, the watchdog timer is started,
597 * and the stack is notified that the interface is ready.
598 **/
599
600 static int
601 ixgb_open(struct net_device *netdev)
602 {
603 struct ixgb_adapter *adapter = netdev_priv(netdev);
604 int err;
605
606 /* allocate transmit descriptors */
607
608 if((err = ixgb_setup_tx_resources(adapter)))
609 goto err_setup_tx;
610
611 /* allocate receive descriptors */
612
613 if((err = ixgb_setup_rx_resources(adapter)))
614 goto err_setup_rx;
615
616 if((err = ixgb_up(adapter)))
617 goto err_up;
618
619 return 0;
620
621 err_up:
622 ixgb_free_rx_resources(adapter);
623 err_setup_rx:
624 ixgb_free_tx_resources(adapter);
625 err_setup_tx:
626 ixgb_reset(adapter);
627
628 return err;
629 }
630
631 /**
632 * ixgb_close - Disables a network interface
633 * @netdev: network interface device structure
634 *
635 * Returns 0, this is not allowed to fail
636 *
637 * The close entry point is called when an interface is de-activated
638 * by the OS. The hardware is still under the drivers control, but
639 * needs to be disabled. A global MAC reset is issued to stop the
640 * hardware, and all transmit and receive resources are freed.
641 **/
642
643 static int
644 ixgb_close(struct net_device *netdev)
645 {
646 struct ixgb_adapter *adapter = netdev_priv(netdev);
647
648 ixgb_down(adapter, TRUE);
649
650 ixgb_free_tx_resources(adapter);
651 ixgb_free_rx_resources(adapter);
652
653 return 0;
654 }
655
656 /**
657 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
658 * @adapter: board private structure
659 *
660 * Return 0 on success, negative on failure
661 **/
662
663 int
664 ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
665 {
666 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
667 struct pci_dev *pdev = adapter->pdev;
668 int size;
669
670 size = sizeof(struct ixgb_buffer) * txdr->count;
671 txdr->buffer_info = vmalloc(size);
672 if(!txdr->buffer_info) {
673 DPRINTK(PROBE, ERR,
674 "Unable to allocate transmit descriptor ring memory\n");
675 return -ENOMEM;
676 }
677 memset(txdr->buffer_info, 0, size);
678
679 /* round up to nearest 4K */
680
681 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
682 txdr->size = ALIGN(txdr->size, 4096);
683
684 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
685 if(!txdr->desc) {
686 vfree(txdr->buffer_info);
687 DPRINTK(PROBE, ERR,
688 "Unable to allocate transmit descriptor memory\n");
689 return -ENOMEM;
690 }
691 memset(txdr->desc, 0, txdr->size);
692
693 txdr->next_to_use = 0;
694 txdr->next_to_clean = 0;
695
696 return 0;
697 }
698
699 /**
700 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
701 * @adapter: board private structure
702 *
703 * Configure the Tx unit of the MAC after a reset.
704 **/
705
706 static void
707 ixgb_configure_tx(struct ixgb_adapter *adapter)
708 {
709 uint64_t tdba = adapter->tx_ring.dma;
710 uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
711 uint32_t tctl;
712 struct ixgb_hw *hw = &adapter->hw;
713
714 /* Setup the Base and Length of the Tx Descriptor Ring
715 * tx_ring.dma can be either a 32 or 64 bit value
716 */
717
718 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
719 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
720
721 IXGB_WRITE_REG(hw, TDLEN, tdlen);
722
723 /* Setup the HW Tx Head and Tail descriptor pointers */
724
725 IXGB_WRITE_REG(hw, TDH, 0);
726 IXGB_WRITE_REG(hw, TDT, 0);
727
728 /* don't set up txdctl, it induces performance problems if configured
729 * incorrectly */
730 /* Set the Tx Interrupt Delay register */
731
732 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
733
734 /* Program the Transmit Control Register */
735
736 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
737 IXGB_WRITE_REG(hw, TCTL, tctl);
738
739 /* Setup Transmit Descriptor Settings for this adapter */
740 adapter->tx_cmd_type =
741 IXGB_TX_DESC_TYPE
742 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
743 }
744
745 /**
746 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
747 * @adapter: board private structure
748 *
749 * Returns 0 on success, negative on failure
750 **/
751
752 int
753 ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
754 {
755 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
756 struct pci_dev *pdev = adapter->pdev;
757 int size;
758
759 size = sizeof(struct ixgb_buffer) * rxdr->count;
760 rxdr->buffer_info = vmalloc(size);
761 if(!rxdr->buffer_info) {
762 DPRINTK(PROBE, ERR,
763 "Unable to allocate receive descriptor ring\n");
764 return -ENOMEM;
765 }
766 memset(rxdr->buffer_info, 0, size);
767
768 /* Round up to nearest 4K */
769
770 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
771 rxdr->size = ALIGN(rxdr->size, 4096);
772
773 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
774
775 if(!rxdr->desc) {
776 vfree(rxdr->buffer_info);
777 DPRINTK(PROBE, ERR,
778 "Unable to allocate receive descriptors\n");
779 return -ENOMEM;
780 }
781 memset(rxdr->desc, 0, rxdr->size);
782
783 rxdr->next_to_clean = 0;
784 rxdr->next_to_use = 0;
785
786 return 0;
787 }
788
789 /**
790 * ixgb_setup_rctl - configure the receive control register
791 * @adapter: Board private structure
792 **/
793
794 static void
795 ixgb_setup_rctl(struct ixgb_adapter *adapter)
796 {
797 uint32_t rctl;
798
799 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
800
801 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
802
803 rctl |=
804 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
805 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
806 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
807
808 rctl |= IXGB_RCTL_SECRC;
809
810 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
811 rctl |= IXGB_RCTL_BSIZE_2048;
812 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
813 rctl |= IXGB_RCTL_BSIZE_4096;
814 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
815 rctl |= IXGB_RCTL_BSIZE_8192;
816 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
817 rctl |= IXGB_RCTL_BSIZE_16384;
818
819 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
820 }
821
822 /**
823 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
824 * @adapter: board private structure
825 *
826 * Configure the Rx unit of the MAC after a reset.
827 **/
828
829 static void
830 ixgb_configure_rx(struct ixgb_adapter *adapter)
831 {
832 uint64_t rdba = adapter->rx_ring.dma;
833 uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
834 struct ixgb_hw *hw = &adapter->hw;
835 uint32_t rctl;
836 uint32_t rxcsum;
837 uint32_t rxdctl;
838
839 /* make sure receives are disabled while setting up the descriptors */
840
841 rctl = IXGB_READ_REG(hw, RCTL);
842 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
843
844 /* set the Receive Delay Timer Register */
845
846 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
847
848 /* Setup the Base and Length of the Rx Descriptor Ring */
849
850 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
851 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
852
853 IXGB_WRITE_REG(hw, RDLEN, rdlen);
854
855 /* Setup the HW Rx Head and Tail Descriptor Pointers */
856 IXGB_WRITE_REG(hw, RDH, 0);
857 IXGB_WRITE_REG(hw, RDT, 0);
858
859 /* set up pre-fetching of receive buffers so we get some before we
860 * run out (default hardware behavior is to run out before fetching
861 * more). This sets up to fetch if HTHRESH rx descriptors are avail
862 * and the descriptors in hw cache are below PTHRESH. This avoids
863 * the hardware behavior of fetching <=512 descriptors in a single
864 * burst that pre-empts all other activity, usually causing fifo
865 * overflows. */
866 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
867 rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT |
868 RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT |
869 RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
870 IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
871
872 /* Enable Receive Checksum Offload for TCP and UDP */
873 if(adapter->rx_csum == TRUE) {
874 rxcsum = IXGB_READ_REG(hw, RXCSUM);
875 rxcsum |= IXGB_RXCSUM_TUOFL;
876 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
877 }
878
879 /* Enable Receives */
880
881 IXGB_WRITE_REG(hw, RCTL, rctl);
882 }
883
884 /**
885 * ixgb_free_tx_resources - Free Tx Resources
886 * @adapter: board private structure
887 *
888 * Free all transmit software resources
889 **/
890
891 void
892 ixgb_free_tx_resources(struct ixgb_adapter *adapter)
893 {
894 struct pci_dev *pdev = adapter->pdev;
895
896 ixgb_clean_tx_ring(adapter);
897
898 vfree(adapter->tx_ring.buffer_info);
899 adapter->tx_ring.buffer_info = NULL;
900
901 pci_free_consistent(pdev, adapter->tx_ring.size,
902 adapter->tx_ring.desc, adapter->tx_ring.dma);
903
904 adapter->tx_ring.desc = NULL;
905 }
906
907 static void
908 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
909 struct ixgb_buffer *buffer_info)
910 {
911 struct pci_dev *pdev = adapter->pdev;
912
913 if (buffer_info->dma)
914 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
915 PCI_DMA_TODEVICE);
916
917 if (buffer_info->skb)
918 dev_kfree_skb_any(buffer_info->skb);
919
920 buffer_info->skb = NULL;
921 buffer_info->dma = 0;
922 buffer_info->time_stamp = 0;
923 /* these fields must always be initialized in tx
924 * buffer_info->length = 0;
925 * buffer_info->next_to_watch = 0; */
926 }
927
928 /**
929 * ixgb_clean_tx_ring - Free Tx Buffers
930 * @adapter: board private structure
931 **/
932
933 static void
934 ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
935 {
936 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
937 struct ixgb_buffer *buffer_info;
938 unsigned long size;
939 unsigned int i;
940
941 /* Free all the Tx ring sk_buffs */
942
943 for(i = 0; i < tx_ring->count; i++) {
944 buffer_info = &tx_ring->buffer_info[i];
945 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
946 }
947
948 size = sizeof(struct ixgb_buffer) * tx_ring->count;
949 memset(tx_ring->buffer_info, 0, size);
950
951 /* Zero out the descriptor ring */
952
953 memset(tx_ring->desc, 0, tx_ring->size);
954
955 tx_ring->next_to_use = 0;
956 tx_ring->next_to_clean = 0;
957
958 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
959 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
960 }
961
962 /**
963 * ixgb_free_rx_resources - Free Rx Resources
964 * @adapter: board private structure
965 *
966 * Free all receive software resources
967 **/
968
969 void
970 ixgb_free_rx_resources(struct ixgb_adapter *adapter)
971 {
972 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
973 struct pci_dev *pdev = adapter->pdev;
974
975 ixgb_clean_rx_ring(adapter);
976
977 vfree(rx_ring->buffer_info);
978 rx_ring->buffer_info = NULL;
979
980 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
981
982 rx_ring->desc = NULL;
983 }
984
985 /**
986 * ixgb_clean_rx_ring - Free Rx Buffers
987 * @adapter: board private structure
988 **/
989
990 static void
991 ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
992 {
993 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
994 struct ixgb_buffer *buffer_info;
995 struct pci_dev *pdev = adapter->pdev;
996 unsigned long size;
997 unsigned int i;
998
999 /* Free all the Rx ring sk_buffs */
1000
1001 for(i = 0; i < rx_ring->count; i++) {
1002 buffer_info = &rx_ring->buffer_info[i];
1003 if(buffer_info->skb) {
1004
1005 pci_unmap_single(pdev,
1006 buffer_info->dma,
1007 buffer_info->length,
1008 PCI_DMA_FROMDEVICE);
1009
1010 dev_kfree_skb(buffer_info->skb);
1011
1012 buffer_info->skb = NULL;
1013 }
1014 }
1015
1016 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1017 memset(rx_ring->buffer_info, 0, size);
1018
1019 /* Zero out the descriptor ring */
1020
1021 memset(rx_ring->desc, 0, rx_ring->size);
1022
1023 rx_ring->next_to_clean = 0;
1024 rx_ring->next_to_use = 0;
1025
1026 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1027 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1028 }
1029
1030 /**
1031 * ixgb_set_mac - Change the Ethernet Address of the NIC
1032 * @netdev: network interface device structure
1033 * @p: pointer to an address structure
1034 *
1035 * Returns 0 on success, negative on failure
1036 **/
1037
1038 static int
1039 ixgb_set_mac(struct net_device *netdev, void *p)
1040 {
1041 struct ixgb_adapter *adapter = netdev_priv(netdev);
1042 struct sockaddr *addr = p;
1043
1044 if(!is_valid_ether_addr(addr->sa_data))
1045 return -EADDRNOTAVAIL;
1046
1047 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1048
1049 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1050
1051 return 0;
1052 }
1053
1054 /**
1055 * ixgb_set_multi - Multicast and Promiscuous mode set
1056 * @netdev: network interface device structure
1057 *
1058 * The set_multi entry point is called whenever the multicast address
1059 * list or the network interface flags are updated. This routine is
1060 * responsible for configuring the hardware for proper multicast,
1061 * promiscuous mode, and all-multi behavior.
1062 **/
1063
1064 static void
1065 ixgb_set_multi(struct net_device *netdev)
1066 {
1067 struct ixgb_adapter *adapter = netdev_priv(netdev);
1068 struct ixgb_hw *hw = &adapter->hw;
1069 struct dev_mc_list *mc_ptr;
1070 uint32_t rctl;
1071 int i;
1072
1073 /* Check for Promiscuous and All Multicast modes */
1074
1075 rctl = IXGB_READ_REG(hw, RCTL);
1076
1077 if(netdev->flags & IFF_PROMISC) {
1078 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1079 } else if(netdev->flags & IFF_ALLMULTI) {
1080 rctl |= IXGB_RCTL_MPE;
1081 rctl &= ~IXGB_RCTL_UPE;
1082 } else {
1083 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1084 }
1085
1086 if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1087 rctl |= IXGB_RCTL_MPE;
1088 IXGB_WRITE_REG(hw, RCTL, rctl);
1089 } else {
1090 uint8_t mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS];
1091
1092 IXGB_WRITE_REG(hw, RCTL, rctl);
1093
1094 for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
1095 i++, mc_ptr = mc_ptr->next)
1096 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
1097 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1098
1099 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1100 }
1101 }
1102
1103 /**
1104 * ixgb_watchdog - Timer Call-back
1105 * @data: pointer to netdev cast into an unsigned long
1106 **/
1107
1108 static void
1109 ixgb_watchdog(unsigned long data)
1110 {
1111 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1112 struct net_device *netdev = adapter->netdev;
1113 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1114
1115 ixgb_check_for_link(&adapter->hw);
1116
1117 if (ixgb_check_for_bad_link(&adapter->hw)) {
1118 /* force the reset path */
1119 netif_stop_queue(netdev);
1120 }
1121
1122 if(adapter->hw.link_up) {
1123 if(!netif_carrier_ok(netdev)) {
1124 DPRINTK(LINK, INFO,
1125 "NIC Link is Up 10000 Mbps Full Duplex\n");
1126 adapter->link_speed = 10000;
1127 adapter->link_duplex = FULL_DUPLEX;
1128 netif_carrier_on(netdev);
1129 netif_wake_queue(netdev);
1130 }
1131 } else {
1132 if(netif_carrier_ok(netdev)) {
1133 adapter->link_speed = 0;
1134 adapter->link_duplex = 0;
1135 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1136 netif_carrier_off(netdev);
1137 netif_stop_queue(netdev);
1138
1139 }
1140 }
1141
1142 ixgb_update_stats(adapter);
1143
1144 if(!netif_carrier_ok(netdev)) {
1145 if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1146 /* We've lost link, so the controller stops DMA,
1147 * but we've got queued Tx work that's never going
1148 * to get done, so reset controller to flush Tx.
1149 * (Do the reset outside of interrupt context). */
1150 schedule_work(&adapter->tx_timeout_task);
1151 }
1152 }
1153
1154 /* Force detection of hung controller every watchdog period */
1155 adapter->detect_tx_hung = TRUE;
1156
1157 /* generate an interrupt to force clean up of any stragglers */
1158 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1159
1160 /* Reset the timer */
1161 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1162 }
1163
1164 #define IXGB_TX_FLAGS_CSUM 0x00000001
1165 #define IXGB_TX_FLAGS_VLAN 0x00000002
1166 #define IXGB_TX_FLAGS_TSO 0x00000004
1167
1168 static int
1169 ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1170 {
1171 struct ixgb_context_desc *context_desc;
1172 unsigned int i;
1173 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1174 uint16_t ipcse, tucse, mss;
1175 int err;
1176
1177 if (likely(skb_is_gso(skb))) {
1178 struct ixgb_buffer *buffer_info;
1179 struct iphdr *iph;
1180
1181 if (skb_header_cloned(skb)) {
1182 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1183 if (err)
1184 return err;
1185 }
1186
1187 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1188 mss = skb_shinfo(skb)->gso_size;
1189 iph = ip_hdr(skb);
1190 iph->tot_len = 0;
1191 iph->check = 0;
1192 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1193 iph->daddr, 0,
1194 IPPROTO_TCP, 0);
1195 ipcss = skb_network_offset(skb);
1196 ipcso = (void *)&(iph->check) - (void *)skb->data;
1197 ipcse = skb_transport_offset(skb) - 1;
1198 tucss = skb_transport_offset(skb);
1199 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1200 tucse = 0;
1201
1202 i = adapter->tx_ring.next_to_use;
1203 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1204 buffer_info = &adapter->tx_ring.buffer_info[i];
1205 WARN_ON(buffer_info->dma != 0);
1206
1207 context_desc->ipcss = ipcss;
1208 context_desc->ipcso = ipcso;
1209 context_desc->ipcse = cpu_to_le16(ipcse);
1210 context_desc->tucss = tucss;
1211 context_desc->tucso = tucso;
1212 context_desc->tucse = cpu_to_le16(tucse);
1213 context_desc->mss = cpu_to_le16(mss);
1214 context_desc->hdr_len = hdr_len;
1215 context_desc->status = 0;
1216 context_desc->cmd_type_len = cpu_to_le32(
1217 IXGB_CONTEXT_DESC_TYPE
1218 | IXGB_CONTEXT_DESC_CMD_TSE
1219 | IXGB_CONTEXT_DESC_CMD_IP
1220 | IXGB_CONTEXT_DESC_CMD_TCP
1221 | IXGB_CONTEXT_DESC_CMD_IDE
1222 | (skb->len - (hdr_len)));
1223
1224
1225 if(++i == adapter->tx_ring.count) i = 0;
1226 adapter->tx_ring.next_to_use = i;
1227
1228 return 1;
1229 }
1230
1231 return 0;
1232 }
1233
1234 static boolean_t
1235 ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1236 {
1237 struct ixgb_context_desc *context_desc;
1238 unsigned int i;
1239 uint8_t css, cso;
1240
1241 if(likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1242 struct ixgb_buffer *buffer_info;
1243 css = skb_transport_offset(skb);
1244 cso = css + skb->csum_offset;
1245
1246 i = adapter->tx_ring.next_to_use;
1247 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1248 buffer_info = &adapter->tx_ring.buffer_info[i];
1249 WARN_ON(buffer_info->dma != 0);
1250
1251 context_desc->tucss = css;
1252 context_desc->tucso = cso;
1253 context_desc->tucse = 0;
1254 /* zero out any previously existing data in one instruction */
1255 *(uint32_t *)&(context_desc->ipcss) = 0;
1256 context_desc->status = 0;
1257 context_desc->hdr_len = 0;
1258 context_desc->mss = 0;
1259 context_desc->cmd_type_len =
1260 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1261 | IXGB_TX_DESC_CMD_IDE);
1262
1263 if(++i == adapter->tx_ring.count) i = 0;
1264 adapter->tx_ring.next_to_use = i;
1265
1266 return TRUE;
1267 }
1268
1269 return FALSE;
1270 }
1271
1272 #define IXGB_MAX_TXD_PWR 14
1273 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1274
1275 static int
1276 ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1277 unsigned int first)
1278 {
1279 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1280 struct ixgb_buffer *buffer_info;
1281 int len = skb->len;
1282 unsigned int offset = 0, size, count = 0, i;
1283 unsigned int mss = skb_shinfo(skb)->gso_size;
1284
1285 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1286 unsigned int f;
1287
1288 len -= skb->data_len;
1289
1290 i = tx_ring->next_to_use;
1291
1292 while(len) {
1293 buffer_info = &tx_ring->buffer_info[i];
1294 size = min(len, IXGB_MAX_DATA_PER_TXD);
1295 /* Workaround for premature desc write-backs
1296 * in TSO mode. Append 4-byte sentinel desc */
1297 if (unlikely(mss && !nr_frags && size == len && size > 8))
1298 size -= 4;
1299
1300 buffer_info->length = size;
1301 WARN_ON(buffer_info->dma != 0);
1302 buffer_info->dma =
1303 pci_map_single(adapter->pdev,
1304 skb->data + offset,
1305 size,
1306 PCI_DMA_TODEVICE);
1307 buffer_info->time_stamp = jiffies;
1308 buffer_info->next_to_watch = 0;
1309
1310 len -= size;
1311 offset += size;
1312 count++;
1313 if(++i == tx_ring->count) i = 0;
1314 }
1315
1316 for(f = 0; f < nr_frags; f++) {
1317 struct skb_frag_struct *frag;
1318
1319 frag = &skb_shinfo(skb)->frags[f];
1320 len = frag->size;
1321 offset = 0;
1322
1323 while(len) {
1324 buffer_info = &tx_ring->buffer_info[i];
1325 size = min(len, IXGB_MAX_DATA_PER_TXD);
1326
1327 /* Workaround for premature desc write-backs
1328 * in TSO mode. Append 4-byte sentinel desc */
1329 if (unlikely(mss && !nr_frags && size == len
1330 && size > 8))
1331 size -= 4;
1332
1333 buffer_info->length = size;
1334 buffer_info->dma =
1335 pci_map_page(adapter->pdev,
1336 frag->page,
1337 frag->page_offset + offset,
1338 size,
1339 PCI_DMA_TODEVICE);
1340 buffer_info->time_stamp = jiffies;
1341 buffer_info->next_to_watch = 0;
1342
1343 len -= size;
1344 offset += size;
1345 count++;
1346 if(++i == tx_ring->count) i = 0;
1347 }
1348 }
1349 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1350 tx_ring->buffer_info[i].skb = skb;
1351 tx_ring->buffer_info[first].next_to_watch = i;
1352
1353 return count;
1354 }
1355
1356 static void
1357 ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1358 {
1359 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1360 struct ixgb_tx_desc *tx_desc = NULL;
1361 struct ixgb_buffer *buffer_info;
1362 uint32_t cmd_type_len = adapter->tx_cmd_type;
1363 uint8_t status = 0;
1364 uint8_t popts = 0;
1365 unsigned int i;
1366
1367 if(tx_flags & IXGB_TX_FLAGS_TSO) {
1368 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1369 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1370 }
1371
1372 if(tx_flags & IXGB_TX_FLAGS_CSUM)
1373 popts |= IXGB_TX_DESC_POPTS_TXSM;
1374
1375 if(tx_flags & IXGB_TX_FLAGS_VLAN) {
1376 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1377 }
1378
1379 i = tx_ring->next_to_use;
1380
1381 while(count--) {
1382 buffer_info = &tx_ring->buffer_info[i];
1383 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1384 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1385 tx_desc->cmd_type_len =
1386 cpu_to_le32(cmd_type_len | buffer_info->length);
1387 tx_desc->status = status;
1388 tx_desc->popts = popts;
1389 tx_desc->vlan = cpu_to_le16(vlan_id);
1390
1391 if(++i == tx_ring->count) i = 0;
1392 }
1393
1394 tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1395 | IXGB_TX_DESC_CMD_RS );
1396
1397 /* Force memory writes to complete before letting h/w
1398 * know there are new descriptors to fetch. (Only
1399 * applicable for weak-ordered memory model archs,
1400 * such as IA-64). */
1401 wmb();
1402
1403 tx_ring->next_to_use = i;
1404 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1405 }
1406
1407 static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1408 {
1409 struct ixgb_adapter *adapter = netdev_priv(netdev);
1410 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1411
1412 netif_stop_queue(netdev);
1413 /* Herbert's original patch had:
1414 * smp_mb__after_netif_stop_queue();
1415 * but since that doesn't exist yet, just open code it. */
1416 smp_mb();
1417
1418 /* We need to check again in a case another CPU has just
1419 * made room available. */
1420 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1421 return -EBUSY;
1422
1423 /* A reprieve! */
1424 netif_start_queue(netdev);
1425 ++adapter->restart_queue;
1426 return 0;
1427 }
1428
1429 static int ixgb_maybe_stop_tx(struct net_device *netdev,
1430 struct ixgb_desc_ring *tx_ring, int size)
1431 {
1432 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1433 return 0;
1434 return __ixgb_maybe_stop_tx(netdev, size);
1435 }
1436
1437
1438 /* Tx Descriptors needed, worst case */
1439 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1440 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1441 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1442 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1443 + 1 /* one more needed for sentinel TSO workaround */
1444
1445 static int
1446 ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1447 {
1448 struct ixgb_adapter *adapter = netdev_priv(netdev);
1449 unsigned int first;
1450 unsigned int tx_flags = 0;
1451 unsigned long flags;
1452 int vlan_id = 0;
1453 int tso;
1454
1455 if(skb->len <= 0) {
1456 dev_kfree_skb_any(skb);
1457 return 0;
1458 }
1459
1460 #ifdef NETIF_F_LLTX
1461 local_irq_save(flags);
1462 if (!spin_trylock(&adapter->tx_lock)) {
1463 /* Collision - tell upper layer to requeue */
1464 local_irq_restore(flags);
1465 return NETDEV_TX_LOCKED;
1466 }
1467 #else
1468 spin_lock_irqsave(&adapter->tx_lock, flags);
1469 #endif
1470
1471 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
1472 DESC_NEEDED))) {
1473 netif_stop_queue(netdev);
1474 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1475 return NETDEV_TX_BUSY;
1476 }
1477
1478 #ifndef NETIF_F_LLTX
1479 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1480 #endif
1481
1482 if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
1483 tx_flags |= IXGB_TX_FLAGS_VLAN;
1484 vlan_id = vlan_tx_tag_get(skb);
1485 }
1486
1487 first = adapter->tx_ring.next_to_use;
1488
1489 tso = ixgb_tso(adapter, skb);
1490 if (tso < 0) {
1491 dev_kfree_skb_any(skb);
1492 #ifdef NETIF_F_LLTX
1493 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1494 #endif
1495 return NETDEV_TX_OK;
1496 }
1497
1498 if (likely(tso))
1499 tx_flags |= IXGB_TX_FLAGS_TSO;
1500 else if(ixgb_tx_csum(adapter, skb))
1501 tx_flags |= IXGB_TX_FLAGS_CSUM;
1502
1503 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1504 tx_flags);
1505
1506 netdev->trans_start = jiffies;
1507
1508 #ifdef NETIF_F_LLTX
1509 /* Make sure there is space in the ring for the next send. */
1510 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1511
1512 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1513
1514 #endif
1515 return NETDEV_TX_OK;
1516 }
1517
1518 /**
1519 * ixgb_tx_timeout - Respond to a Tx Hang
1520 * @netdev: network interface device structure
1521 **/
1522
1523 static void
1524 ixgb_tx_timeout(struct net_device *netdev)
1525 {
1526 struct ixgb_adapter *adapter = netdev_priv(netdev);
1527
1528 /* Do the reset outside of interrupt context */
1529 schedule_work(&adapter->tx_timeout_task);
1530 }
1531
1532 static void
1533 ixgb_tx_timeout_task(struct work_struct *work)
1534 {
1535 struct ixgb_adapter *adapter =
1536 container_of(work, struct ixgb_adapter, tx_timeout_task);
1537
1538 adapter->tx_timeout_count++;
1539 ixgb_down(adapter, TRUE);
1540 ixgb_up(adapter);
1541 }
1542
1543 /**
1544 * ixgb_get_stats - Get System Network Statistics
1545 * @netdev: network interface device structure
1546 *
1547 * Returns the address of the device statistics structure.
1548 * The statistics are actually updated from the timer callback.
1549 **/
1550
1551 static struct net_device_stats *
1552 ixgb_get_stats(struct net_device *netdev)
1553 {
1554 struct ixgb_adapter *adapter = netdev_priv(netdev);
1555
1556 return &adapter->net_stats;
1557 }
1558
1559 /**
1560 * ixgb_change_mtu - Change the Maximum Transfer Unit
1561 * @netdev: network interface device structure
1562 * @new_mtu: new value for maximum frame size
1563 *
1564 * Returns 0 on success, negative on failure
1565 **/
1566
1567 static int
1568 ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1569 {
1570 struct ixgb_adapter *adapter = netdev_priv(netdev);
1571 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1572 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1573
1574
1575 if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1576 || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
1577 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1578 return -EINVAL;
1579 }
1580
1581 adapter->rx_buffer_len = max_frame;
1582
1583 netdev->mtu = new_mtu;
1584
1585 if ((old_max_frame != max_frame) && netif_running(netdev)) {
1586 ixgb_down(adapter, TRUE);
1587 ixgb_up(adapter);
1588 }
1589
1590 return 0;
1591 }
1592
1593 /**
1594 * ixgb_update_stats - Update the board statistics counters.
1595 * @adapter: board private structure
1596 **/
1597
1598 void
1599 ixgb_update_stats(struct ixgb_adapter *adapter)
1600 {
1601 struct net_device *netdev = adapter->netdev;
1602 struct pci_dev *pdev = adapter->pdev;
1603
1604 /* Prevent stats update while adapter is being reset */
1605 if (pci_channel_offline(pdev))
1606 return;
1607
1608 if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
1609 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1610 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1611 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1612 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1613 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1614
1615 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1616 /* fix up multicast stats by removing broadcasts */
1617 if(multi >= bcast)
1618 multi -= bcast;
1619
1620 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1621 adapter->stats.mprch += (multi >> 32);
1622 adapter->stats.bprcl += bcast_l;
1623 adapter->stats.bprch += bcast_h;
1624 } else {
1625 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1626 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1627 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1628 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1629 }
1630 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1631 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1632 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1633 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1634 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1635 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1636 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1637 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1638 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1639 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1640 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1641 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1642 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1643 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1644 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1645 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1646 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1647 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1648 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1649 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1650 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1651 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1652 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1653 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1654 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1655 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1656 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1657 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1658 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1659 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1660 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1661 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1662 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1663 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1664 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1665 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1666 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1667 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1668 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1669 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1670 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1671 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1672 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1673 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1674 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1675 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1676 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1677 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1678 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1679 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1680 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1681 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1682 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1683 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1684 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1685 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1686
1687 /* Fill out the OS statistics structure */
1688
1689 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1690 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1691 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1692 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1693 adapter->net_stats.multicast = adapter->stats.mprcl;
1694 adapter->net_stats.collisions = 0;
1695
1696 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1697 * with a length in the type/len field */
1698 adapter->net_stats.rx_errors =
1699 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1700 adapter->stats.ruc +
1701 adapter->stats.roc /*+ adapter->stats.rlec */ +
1702 adapter->stats.icbc +
1703 adapter->stats.ecbc + adapter->stats.mpc;
1704
1705 /* see above
1706 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1707 */
1708
1709 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1710 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1711 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1712 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1713
1714 adapter->net_stats.tx_errors = 0;
1715 adapter->net_stats.rx_frame_errors = 0;
1716 adapter->net_stats.tx_aborted_errors = 0;
1717 adapter->net_stats.tx_carrier_errors = 0;
1718 adapter->net_stats.tx_fifo_errors = 0;
1719 adapter->net_stats.tx_heartbeat_errors = 0;
1720 adapter->net_stats.tx_window_errors = 0;
1721 }
1722
1723 #define IXGB_MAX_INTR 10
1724 /**
1725 * ixgb_intr - Interrupt Handler
1726 * @irq: interrupt number
1727 * @data: pointer to a network interface device structure
1728 **/
1729
1730 static irqreturn_t
1731 ixgb_intr(int irq, void *data)
1732 {
1733 struct net_device *netdev = data;
1734 struct ixgb_adapter *adapter = netdev_priv(netdev);
1735 struct ixgb_hw *hw = &adapter->hw;
1736 uint32_t icr = IXGB_READ_REG(hw, ICR);
1737 #ifndef CONFIG_IXGB_NAPI
1738 unsigned int i;
1739 #endif
1740
1741 if(unlikely(!icr))
1742 return IRQ_NONE; /* Not our interrupt */
1743
1744 if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) {
1745 mod_timer(&adapter->watchdog_timer, jiffies);
1746 }
1747
1748 #ifdef CONFIG_IXGB_NAPI
1749 if(netif_rx_schedule_prep(netdev)) {
1750
1751 /* Disable interrupts and register for poll. The flush
1752 of the posted write is intentionally left out.
1753 */
1754
1755 atomic_inc(&adapter->irq_sem);
1756 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
1757 __netif_rx_schedule(netdev);
1758 }
1759 #else
1760 /* yes, that is actually a & and it is meant to make sure that
1761 * every pass through this for loop checks both receive and
1762 * transmit queues for completed descriptors, intended to
1763 * avoid starvation issues and assist tx/rx fairness. */
1764 for(i = 0; i < IXGB_MAX_INTR; i++)
1765 if(!ixgb_clean_rx_irq(adapter) &
1766 !ixgb_clean_tx_irq(adapter))
1767 break;
1768 #endif
1769 return IRQ_HANDLED;
1770 }
1771
1772 #ifdef CONFIG_IXGB_NAPI
1773 /**
1774 * ixgb_clean - NAPI Rx polling callback
1775 * @adapter: board private structure
1776 **/
1777
1778 static int
1779 ixgb_clean(struct net_device *netdev, int *budget)
1780 {
1781 struct ixgb_adapter *adapter = netdev_priv(netdev);
1782 int work_to_do = min(*budget, netdev->quota);
1783 int tx_cleaned;
1784 int work_done = 0;
1785
1786 tx_cleaned = ixgb_clean_tx_irq(adapter);
1787 ixgb_clean_rx_irq(adapter, &work_done, work_to_do);
1788
1789 *budget -= work_done;
1790 netdev->quota -= work_done;
1791
1792 /* if no Tx and not enough Rx work done, exit the polling mode */
1793 if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
1794 netif_rx_complete(netdev);
1795 ixgb_irq_enable(adapter);
1796 return 0;
1797 }
1798
1799 return 1;
1800 }
1801 #endif
1802
1803 /**
1804 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1805 * @adapter: board private structure
1806 **/
1807
1808 static boolean_t
1809 ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1810 {
1811 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1812 struct net_device *netdev = adapter->netdev;
1813 struct ixgb_tx_desc *tx_desc, *eop_desc;
1814 struct ixgb_buffer *buffer_info;
1815 unsigned int i, eop;
1816 boolean_t cleaned = FALSE;
1817
1818 i = tx_ring->next_to_clean;
1819 eop = tx_ring->buffer_info[i].next_to_watch;
1820 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1821
1822 while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1823
1824 for(cleaned = FALSE; !cleaned; ) {
1825 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1826 buffer_info = &tx_ring->buffer_info[i];
1827
1828 if (tx_desc->popts
1829 & (IXGB_TX_DESC_POPTS_TXSM |
1830 IXGB_TX_DESC_POPTS_IXSM))
1831 adapter->hw_csum_tx_good++;
1832
1833 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1834
1835 *(uint32_t *)&(tx_desc->status) = 0;
1836
1837 cleaned = (i == eop);
1838 if(++i == tx_ring->count) i = 0;
1839 }
1840
1841 eop = tx_ring->buffer_info[i].next_to_watch;
1842 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1843 }
1844
1845 tx_ring->next_to_clean = i;
1846
1847 if (unlikely(netif_queue_stopped(netdev))) {
1848 spin_lock(&adapter->tx_lock);
1849 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
1850 (IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED))
1851 netif_wake_queue(netdev);
1852 spin_unlock(&adapter->tx_lock);
1853 }
1854
1855 if(adapter->detect_tx_hung) {
1856 /* detect a transmit hang in hardware, this serializes the
1857 * check with the clearing of time_stamp and movement of i */
1858 adapter->detect_tx_hung = FALSE;
1859 if (tx_ring->buffer_info[eop].dma &&
1860 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1861 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
1862 IXGB_STATUS_TXOFF)) {
1863 /* detected Tx unit hang */
1864 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1865 " TDH <%x>\n"
1866 " TDT <%x>\n"
1867 " next_to_use <%x>\n"
1868 " next_to_clean <%x>\n"
1869 "buffer_info[next_to_clean]\n"
1870 " time_stamp <%lx>\n"
1871 " next_to_watch <%x>\n"
1872 " jiffies <%lx>\n"
1873 " next_to_watch.status <%x>\n",
1874 IXGB_READ_REG(&adapter->hw, TDH),
1875 IXGB_READ_REG(&adapter->hw, TDT),
1876 tx_ring->next_to_use,
1877 tx_ring->next_to_clean,
1878 tx_ring->buffer_info[eop].time_stamp,
1879 eop,
1880 jiffies,
1881 eop_desc->status);
1882 netif_stop_queue(netdev);
1883 }
1884 }
1885
1886 return cleaned;
1887 }
1888
1889 /**
1890 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1891 * @adapter: board private structure
1892 * @rx_desc: receive descriptor
1893 * @sk_buff: socket buffer with received data
1894 **/
1895
1896 static void
1897 ixgb_rx_checksum(struct ixgb_adapter *adapter,
1898 struct ixgb_rx_desc *rx_desc,
1899 struct sk_buff *skb)
1900 {
1901 /* Ignore Checksum bit is set OR
1902 * TCP Checksum has not been calculated
1903 */
1904 if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1905 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1906 skb->ip_summed = CHECKSUM_NONE;
1907 return;
1908 }
1909
1910 /* At this point we know the hardware did the TCP checksum */
1911 /* now look at the TCP checksum error bit */
1912 if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1913 /* let the stack verify checksum errors */
1914 skb->ip_summed = CHECKSUM_NONE;
1915 adapter->hw_csum_rx_error++;
1916 } else {
1917 /* TCP checksum is good */
1918 skb->ip_summed = CHECKSUM_UNNECESSARY;
1919 adapter->hw_csum_rx_good++;
1920 }
1921 }
1922
1923 /**
1924 * ixgb_clean_rx_irq - Send received data up the network stack,
1925 * @adapter: board private structure
1926 **/
1927
1928 static boolean_t
1929 #ifdef CONFIG_IXGB_NAPI
1930 ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1931 #else
1932 ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1933 #endif
1934 {
1935 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1936 struct net_device *netdev = adapter->netdev;
1937 struct pci_dev *pdev = adapter->pdev;
1938 struct ixgb_rx_desc *rx_desc, *next_rxd;
1939 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
1940 uint32_t length;
1941 unsigned int i, j;
1942 boolean_t cleaned = FALSE;
1943
1944 i = rx_ring->next_to_clean;
1945 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1946 buffer_info = &rx_ring->buffer_info[i];
1947
1948 while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
1949 struct sk_buff *skb, *next_skb;
1950 u8 status;
1951
1952 #ifdef CONFIG_IXGB_NAPI
1953 if(*work_done >= work_to_do)
1954 break;
1955
1956 (*work_done)++;
1957 #endif
1958 status = rx_desc->status;
1959 skb = buffer_info->skb;
1960 buffer_info->skb = NULL;
1961
1962 prefetch(skb->data);
1963
1964 if(++i == rx_ring->count) i = 0;
1965 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1966 prefetch(next_rxd);
1967
1968 if((j = i + 1) == rx_ring->count) j = 0;
1969 next2_buffer = &rx_ring->buffer_info[j];
1970 prefetch(next2_buffer);
1971
1972 next_buffer = &rx_ring->buffer_info[i];
1973 next_skb = next_buffer->skb;
1974 prefetch(next_skb);
1975
1976 cleaned = TRUE;
1977
1978 pci_unmap_single(pdev,
1979 buffer_info->dma,
1980 buffer_info->length,
1981 PCI_DMA_FROMDEVICE);
1982
1983 length = le16_to_cpu(rx_desc->length);
1984
1985 if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1986
1987 /* All receives must fit into a single buffer */
1988
1989 IXGB_DBG("Receive packet consumed multiple buffers "
1990 "length<%x>\n", length);
1991
1992 dev_kfree_skb_irq(skb);
1993 goto rxdesc_done;
1994 }
1995
1996 if (unlikely(rx_desc->errors
1997 & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
1998 | IXGB_RX_DESC_ERRORS_P |
1999 IXGB_RX_DESC_ERRORS_RXE))) {
2000
2001 dev_kfree_skb_irq(skb);
2002 goto rxdesc_done;
2003 }
2004
2005 /* code added for copybreak, this should improve
2006 * performance for small packets with large amounts
2007 * of reassembly being done in the stack */
2008 #define IXGB_CB_LENGTH 256
2009 if (length < IXGB_CB_LENGTH) {
2010 struct sk_buff *new_skb =
2011 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
2012 if (new_skb) {
2013 skb_reserve(new_skb, NET_IP_ALIGN);
2014 skb_copy_to_linear_data_offset(new_skb,
2015 -NET_IP_ALIGN,
2016 (skb->data -
2017 NET_IP_ALIGN),
2018 (length +
2019 NET_IP_ALIGN));
2020 /* save the skb in buffer_info as good */
2021 buffer_info->skb = skb;
2022 skb = new_skb;
2023 }
2024 }
2025 /* end copybreak code */
2026
2027 /* Good Receive */
2028 skb_put(skb, length);
2029
2030 /* Receive Checksum Offload */
2031 ixgb_rx_checksum(adapter, rx_desc, skb);
2032
2033 skb->protocol = eth_type_trans(skb, netdev);
2034 #ifdef CONFIG_IXGB_NAPI
2035 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2036 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2037 le16_to_cpu(rx_desc->special) &
2038 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2039 } else {
2040 netif_receive_skb(skb);
2041 }
2042 #else /* CONFIG_IXGB_NAPI */
2043 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2044 vlan_hwaccel_rx(skb, adapter->vlgrp,
2045 le16_to_cpu(rx_desc->special) &
2046 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2047 } else {
2048 netif_rx(skb);
2049 }
2050 #endif /* CONFIG_IXGB_NAPI */
2051 netdev->last_rx = jiffies;
2052
2053 rxdesc_done:
2054 /* clean up descriptor, might be written over by hw */
2055 rx_desc->status = 0;
2056
2057 /* use prefetched values */
2058 rx_desc = next_rxd;
2059 buffer_info = next_buffer;
2060 }
2061
2062 rx_ring->next_to_clean = i;
2063
2064 ixgb_alloc_rx_buffers(adapter);
2065
2066 return cleaned;
2067 }
2068
2069 /**
2070 * ixgb_alloc_rx_buffers - Replace used receive buffers
2071 * @adapter: address of board private structure
2072 **/
2073
2074 static void
2075 ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
2076 {
2077 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2078 struct net_device *netdev = adapter->netdev;
2079 struct pci_dev *pdev = adapter->pdev;
2080 struct ixgb_rx_desc *rx_desc;
2081 struct ixgb_buffer *buffer_info;
2082 struct sk_buff *skb;
2083 unsigned int i;
2084 int num_group_tail_writes;
2085 long cleancount;
2086
2087 i = rx_ring->next_to_use;
2088 buffer_info = &rx_ring->buffer_info[i];
2089 cleancount = IXGB_DESC_UNUSED(rx_ring);
2090
2091 num_group_tail_writes = IXGB_RX_BUFFER_WRITE;
2092
2093 /* leave three descriptors unused */
2094 while(--cleancount > 2) {
2095 /* recycle! its good for you */
2096 skb = buffer_info->skb;
2097 if (skb) {
2098 skb_trim(skb, 0);
2099 goto map_skb;
2100 }
2101
2102 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2103 + NET_IP_ALIGN);
2104 if (unlikely(!skb)) {
2105 /* Better luck next round */
2106 adapter->alloc_rx_buff_failed++;
2107 break;
2108 }
2109
2110 /* Make buffer alignment 2 beyond a 16 byte boundary
2111 * this will result in a 16 byte aligned IP header after
2112 * the 14 byte MAC header is removed
2113 */
2114 skb_reserve(skb, NET_IP_ALIGN);
2115
2116 buffer_info->skb = skb;
2117 buffer_info->length = adapter->rx_buffer_len;
2118 map_skb:
2119 buffer_info->dma = pci_map_single(pdev,
2120 skb->data,
2121 adapter->rx_buffer_len,
2122 PCI_DMA_FROMDEVICE);
2123
2124 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2125 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
2126 /* guarantee DD bit not set now before h/w gets descriptor
2127 * this is the rest of the workaround for h/w double
2128 * writeback. */
2129 rx_desc->status = 0;
2130
2131
2132 if(++i == rx_ring->count) i = 0;
2133 buffer_info = &rx_ring->buffer_info[i];
2134 }
2135
2136 if (likely(rx_ring->next_to_use != i)) {
2137 rx_ring->next_to_use = i;
2138 if (unlikely(i-- == 0))
2139 i = (rx_ring->count - 1);
2140
2141 /* Force memory writes to complete before letting h/w
2142 * know there are new descriptors to fetch. (Only
2143 * applicable for weak-ordered memory model archs, such
2144 * as IA-64). */
2145 wmb();
2146 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2147 }
2148 }
2149
2150 /**
2151 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2152 *
2153 * @param netdev network interface device structure
2154 * @param grp indicates to enable or disable tagging/stripping
2155 **/
2156 static void
2157 ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2158 {
2159 struct ixgb_adapter *adapter = netdev_priv(netdev);
2160 uint32_t ctrl, rctl;
2161
2162 ixgb_irq_disable(adapter);
2163 adapter->vlgrp = grp;
2164
2165 if(grp) {
2166 /* enable VLAN tag insert/strip */
2167 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2168 ctrl |= IXGB_CTRL0_VME;
2169 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2170
2171 /* enable VLAN receive filtering */
2172
2173 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2174 rctl |= IXGB_RCTL_VFE;
2175 rctl &= ~IXGB_RCTL_CFIEN;
2176 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2177 } else {
2178 /* disable VLAN tag insert/strip */
2179
2180 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2181 ctrl &= ~IXGB_CTRL0_VME;
2182 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2183
2184 /* disable VLAN filtering */
2185
2186 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2187 rctl &= ~IXGB_RCTL_VFE;
2188 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2189 }
2190
2191 ixgb_irq_enable(adapter);
2192 }
2193
2194 static void
2195 ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
2196 {
2197 struct ixgb_adapter *adapter = netdev_priv(netdev);
2198 uint32_t vfta, index;
2199
2200 /* add VID to filter table */
2201
2202 index = (vid >> 5) & 0x7F;
2203 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2204 vfta |= (1 << (vid & 0x1F));
2205 ixgb_write_vfta(&adapter->hw, index, vfta);
2206 }
2207
2208 static void
2209 ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
2210 {
2211 struct ixgb_adapter *adapter = netdev_priv(netdev);
2212 uint32_t vfta, index;
2213
2214 ixgb_irq_disable(adapter);
2215
2216 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2217
2218 ixgb_irq_enable(adapter);
2219
2220 /* remove VID from filter table*/
2221
2222 index = (vid >> 5) & 0x7F;
2223 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2224 vfta &= ~(1 << (vid & 0x1F));
2225 ixgb_write_vfta(&adapter->hw, index, vfta);
2226 }
2227
2228 static void
2229 ixgb_restore_vlan(struct ixgb_adapter *adapter)
2230 {
2231 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2232
2233 if(adapter->vlgrp) {
2234 uint16_t vid;
2235 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2236 if(!vlan_group_get_device(adapter->vlgrp, vid))
2237 continue;
2238 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2239 }
2240 }
2241 }
2242
2243 #ifdef CONFIG_NET_POLL_CONTROLLER
2244 /*
2245 * Polling 'interrupt' - used by things like netconsole to send skbs
2246 * without having to re-enable interrupts. It's not called while
2247 * the interrupt routine is executing.
2248 */
2249
2250 static void ixgb_netpoll(struct net_device *dev)
2251 {
2252 struct ixgb_adapter *adapter = netdev_priv(dev);
2253
2254 disable_irq(adapter->pdev->irq);
2255 ixgb_intr(adapter->pdev->irq, dev);
2256 enable_irq(adapter->pdev->irq);
2257 }
2258 #endif
2259
2260 /**
2261 * ixgb_io_error_detected() - called when PCI error is detected
2262 * @pdev pointer to pci device with error
2263 * @state pci channel state after error
2264 *
2265 * This callback is called by the PCI subsystem whenever
2266 * a PCI bus error is detected.
2267 */
2268 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
2269 enum pci_channel_state state)
2270 {
2271 struct net_device *netdev = pci_get_drvdata(pdev);
2272 struct ixgb_adapter *adapter = netdev_priv(netdev);
2273
2274 if(netif_running(netdev))
2275 ixgb_down(adapter, TRUE);
2276
2277 pci_disable_device(pdev);
2278
2279 /* Request a slot reset. */
2280 return PCI_ERS_RESULT_NEED_RESET;
2281 }
2282
2283 /**
2284 * ixgb_io_slot_reset - called after the pci bus has been reset.
2285 * @pdev pointer to pci device with error
2286 *
2287 * This callback is called after the PCI buss has been reset.
2288 * Basically, this tries to restart the card from scratch.
2289 * This is a shortened version of the device probe/discovery code,
2290 * it resembles the first-half of the ixgb_probe() routine.
2291 */
2292 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev)
2293 {
2294 struct net_device *netdev = pci_get_drvdata(pdev);
2295 struct ixgb_adapter *adapter = netdev_priv(netdev);
2296
2297 if(pci_enable_device(pdev)) {
2298 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2299 return PCI_ERS_RESULT_DISCONNECT;
2300 }
2301
2302 /* Perform card reset only on one instance of the card */
2303 if (0 != PCI_FUNC (pdev->devfn))
2304 return PCI_ERS_RESULT_RECOVERED;
2305
2306 pci_set_master(pdev);
2307
2308 netif_carrier_off(netdev);
2309 netif_stop_queue(netdev);
2310 ixgb_reset(adapter);
2311
2312 /* Make sure the EEPROM is good */
2313 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
2314 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2315 return PCI_ERS_RESULT_DISCONNECT;
2316 }
2317 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2318 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2319
2320 if(!is_valid_ether_addr(netdev->perm_addr)) {
2321 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2322 return PCI_ERS_RESULT_DISCONNECT;
2323 }
2324
2325 return PCI_ERS_RESULT_RECOVERED;
2326 }
2327
2328 /**
2329 * ixgb_io_resume - called when its OK to resume normal operations
2330 * @pdev pointer to pci device with error
2331 *
2332 * The error recovery driver tells us that its OK to resume
2333 * normal operation. Implementation resembles the second-half
2334 * of the ixgb_probe() routine.
2335 */
2336 static void ixgb_io_resume (struct pci_dev *pdev)
2337 {
2338 struct net_device *netdev = pci_get_drvdata(pdev);
2339 struct ixgb_adapter *adapter = netdev_priv(netdev);
2340
2341 pci_set_master(pdev);
2342
2343 if(netif_running(netdev)) {
2344 if(ixgb_up(adapter)) {
2345 printk ("ixgb: can't bring device back up after reset\n");
2346 return;
2347 }
2348 }
2349
2350 netif_device_attach(netdev);
2351 mod_timer(&adapter->watchdog_timer, jiffies);
2352 }
2353
2354 /* ixgb_main.c */
Tomato firmware and modifications.