1 /*******************************************************************************
2
3
4 Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2 of the License, or (at your option)
9 any later version.
10
11 This program is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 more details.
15
16 You should have received a copy of the GNU General Public License along with
17 this program; if not, write to the Free Software Foundation, Inc., 59
18 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19
20 The full GNU General Public License is included in this distribution in the
21 file called LICENSE.
22
23 Contact Information:
24 Linux NICS <linux.nics@intel.com>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27 *******************************************************************************/
28
29 #include "ixgb.h"
30
31 /* Change Log
32 * 1.0.84 10/26/04
33 * - reset buffer_info->dma in Tx resource cleanup logic
34 * 1.0.83 10/12/04
35 * - sparse cleanup - shemminger@osdl.org
36 * - fix tx resource cleanup logic
37 */
38
39 char ixgb_driver_name[] = "ixgb";
40 char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
41 #ifndef CONFIG_IXGB_NAPI
42 #define DRIVERNAPI
43 #else
44 #define DRIVERNAPI "-NAPI"
45 #endif
46 char ixgb_driver_version[] = "1.0.87-k2"DRIVERNAPI;
47 char ixgb_copyright[] = "Copyright (c) 1999-2004 Intel Corporation.";
48
49 /* ixgb_pci_tbl - PCI Device ID Table
50 *
51 * Wildcard entries (PCI_ANY_ID) should come last
52 * Last entry must be all 0s
53 *
54 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
55 * Class, Class Mask, private data (not used) }
56 */
57 static struct pci_device_id ixgb_pci_tbl[] = {
58 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
59 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
60 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
61 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
62 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
63 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
64
65 /* required last entry */
66 {0,}
67 };
68
69 MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
70
71 /* Local Function Prototypes */
72
73 int ixgb_up(struct ixgb_adapter *adapter);
74 void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog);
75 void ixgb_reset(struct ixgb_adapter *adapter);
76 int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
77 int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
78 void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
79 void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
80 void ixgb_update_stats(struct ixgb_adapter *adapter);
81
82 static int ixgb_init_module(void);
83 static void ixgb_exit_module(void);
84 static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
85 static void __devexit ixgb_remove(struct pci_dev *pdev);
86 static int ixgb_sw_init(struct ixgb_adapter *adapter);
87 static int ixgb_open(struct net_device *netdev);
88 static int ixgb_close(struct net_device *netdev);
89 static void ixgb_configure_tx(struct ixgb_adapter *adapter);
90 static void ixgb_configure_rx(struct ixgb_adapter *adapter);
91 static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
92 static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
93 static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
94 static void ixgb_set_multi(struct net_device *netdev);
95 static void ixgb_watchdog(unsigned long data);
96 static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
97 static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
98 static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
99 static int ixgb_set_mac(struct net_device *netdev, void *p);
100 static irqreturn_t ixgb_intr(int irq, void *data, struct pt_regs *regs);
101 static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
102 #ifdef CONFIG_IXGB_NAPI
103 static int ixgb_clean(struct net_device *netdev, int *budget);
104 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter,
105 int *work_done, int work_to_do);
106 #else
107 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter);
108 #endif
109 static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter);
110 void ixgb_set_ethtool_ops(struct net_device *netdev);
111 static void ixgb_tx_timeout(struct net_device *dev);
112 static void ixgb_tx_timeout_task(struct net_device *dev);
113 static void ixgb_vlan_rx_register(struct net_device *netdev,
114 struct vlan_group *grp);
115 static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
116 static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
117 static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
118
119 static int ixgb_notify_reboot(struct notifier_block *, unsigned long event,
120 void *ptr);
121 static int ixgb_suspend(struct pci_dev *pdev, uint32_t state);
122
123 #ifdef CONFIG_NET_POLL_CONTROLLER
124 /* for netdump / net console */
125 static void ixgb_netpoll(struct net_device *dev);
126 #endif
127
128 struct notifier_block ixgb_notifier_reboot = {
129 .notifier_call = ixgb_notify_reboot,
130 .next = NULL,
131 .priority = 0
132 };
133
134 /* Exported from other modules */
135
136 extern void ixgb_check_options(struct ixgb_adapter *adapter);
137
138 static struct pci_driver ixgb_driver = {
139 .name = ixgb_driver_name,
140 .id_table = ixgb_pci_tbl,
141 .probe = ixgb_probe,
142 .remove = __devexit_p(ixgb_remove),
143 /* Power Managment Hooks */
144 .suspend = NULL,
145 .resume = NULL
146 };
147
148 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
149 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
150 MODULE_LICENSE("GPL");
151
152 /* some defines for controlling descriptor fetches in h/w */
153 #define RXDCTL_PTHRESH_DEFAULT 128 /* chip considers prefech below this */
154 #define RXDCTL_HTHRESH_DEFAULT 16 /* chip will only prefetch if tail is
155 pushed this many descriptors from head */
156 #define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */
157
158 /**
159 * ixgb_init_module - Driver Registration Routine
160 *
161 * ixgb_init_module is the first routine called when the driver is
162 * loaded. All it does is register with the PCI subsystem.
163 **/
164
165 static int __init
166 ixgb_init_module(void)
167 {
168 int ret;
169 printk(KERN_INFO "%s - version %s\n",
170 ixgb_driver_string, ixgb_driver_version);
171
172 printk(KERN_INFO "%s\n", ixgb_copyright);
173
174 ret = pci_module_init(&ixgb_driver);
175 if(ret >= 0) {
176 register_reboot_notifier(&ixgb_notifier_reboot);
177 }
178 return ret;
179 }
180
181 module_init(ixgb_init_module);
182
183 /**
184 * ixgb_exit_module - Driver Exit Cleanup Routine
185 *
186 * ixgb_exit_module is called just before the driver is removed
187 * from memory.
188 **/
189
190 static void __exit
191 ixgb_exit_module(void)
192 {
193 unregister_reboot_notifier(&ixgb_notifier_reboot);
194 pci_unregister_driver(&ixgb_driver);
195 }
196
197 module_exit(ixgb_exit_module);
198
199 /**
200 * ixgb_irq_disable - Mask off interrupt generation on the NIC
201 * @adapter: board private structure
202 **/
203
204 static inline void
205 ixgb_irq_disable(struct ixgb_adapter *adapter)
206 {
207 atomic_inc(&adapter->irq_sem);
208 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
209 IXGB_WRITE_FLUSH(&adapter->hw);
210 synchronize_irq(adapter->pdev->irq);
211 }
212
213 /**
214 * ixgb_irq_enable - Enable default interrupt generation settings
215 * @adapter: board private structure
216 **/
217
218 static inline void
219 ixgb_irq_enable(struct ixgb_adapter *adapter)
220 {
221 if(atomic_dec_and_test(&adapter->irq_sem)) {
222 IXGB_WRITE_REG(&adapter->hw, IMS,
223 IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW |
224 IXGB_INT_RXO | IXGB_INT_LSC);
225 IXGB_WRITE_FLUSH(&adapter->hw);
226 }
227 }
228
229 int
230 ixgb_up(struct ixgb_adapter *adapter)
231 {
232 struct net_device *netdev = adapter->netdev;
233 int err;
234 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
235 struct ixgb_hw *hw = &adapter->hw;
236
237 /* hardware has been reset, we need to reload some things */
238
239 ixgb_set_multi(netdev);
240
241 ixgb_restore_vlan(adapter);
242
243 ixgb_configure_tx(adapter);
244 ixgb_setup_rctl(adapter);
245 ixgb_configure_rx(adapter);
246 ixgb_alloc_rx_buffers(adapter);
247
248 #ifdef CONFIG_PCI_MSI
249 {
250 boolean_t pcix = (IXGB_READ_REG(&adapter->hw, STATUS) &
251 IXGB_STATUS_PCIX_MODE) ? TRUE : FALSE;
252 adapter->have_msi = TRUE;
253
254 if (!pcix)
255 adapter->have_msi = FALSE;
256 else if((err = pci_enable_msi(adapter->pdev))) {
257 printk (KERN_ERR
258 "Unable to allocate MSI interrupt Error: %d\n", err);
259 adapter->have_msi = FALSE;
260 /* proceed to try to request regular interrupt */
261 }
262 }
263
264 #endif
265 if((err = request_irq(adapter->pdev->irq, &ixgb_intr,
266 SA_SHIRQ | SA_SAMPLE_RANDOM,
267 netdev->name, netdev)))
268 return err;
269
270 /* disable interrupts and get the hardware into a known state */
271 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
272
273 if((hw->max_frame_size != max_frame) ||
274 (hw->max_frame_size !=
275 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
276
277 hw->max_frame_size = max_frame;
278
279 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
280
281 if(hw->max_frame_size >
282 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
283 uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0);
284
285 if(!(ctrl0 & IXGB_CTRL0_JFE)) {
286 ctrl0 |= IXGB_CTRL0_JFE;
287 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
288 }
289 }
290 }
291
292 mod_timer(&adapter->watchdog_timer, jiffies);
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 #ifdef CONFIG_PCI_MSI
306 if(adapter->have_msi == TRUE)
307 pci_disable_msi(adapter->pdev);
308
309 #endif
310 if(kill_watchdog)
311 del_timer_sync(&adapter->watchdog_timer);
312 adapter->link_speed = 0;
313 adapter->link_duplex = 0;
314 netif_carrier_off(netdev);
315 netif_stop_queue(netdev);
316
317 ixgb_reset(adapter);
318 ixgb_clean_tx_ring(adapter);
319 ixgb_clean_rx_ring(adapter);
320 }
321
322 void
323 ixgb_reset(struct ixgb_adapter *adapter)
324 {
325
326 ixgb_adapter_stop(&adapter->hw);
327 if(!ixgb_init_hw(&adapter->hw))
328 IXGB_DBG("ixgb_init_hw failed.\n");
329 }
330
331 /**
332 * ixgb_probe - Device Initialization Routine
333 * @pdev: PCI device information struct
334 * @ent: entry in ixgb_pci_tbl
335 *
336 * Returns 0 on success, negative on failure
337 *
338 * ixgb_probe initializes an adapter identified by a pci_dev structure.
339 * The OS initialization, configuring of the adapter private structure,
340 * and a hardware reset occur.
341 **/
342
343 static int __devinit
344 ixgb_probe(struct pci_dev *pdev,
345 const struct pci_device_id *ent)
346 {
347 struct net_device *netdev = NULL;
348 struct ixgb_adapter *adapter;
349 static int cards_found = 0;
350 unsigned long mmio_start;
351 int mmio_len;
352 int pci_using_dac;
353 int i;
354 int err;
355
356 if((err = pci_enable_device(pdev)))
357 return err;
358
359 if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
360 pci_using_dac = 1;
361 } else {
362 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
363 IXGB_ERR("No usable DMA configuration, aborting\n");
364 return err;
365 }
366 pci_using_dac = 0;
367 }
368
369 if((err = pci_request_regions(pdev, ixgb_driver_name)))
370 return err;
371
372 pci_set_master(pdev);
373
374 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
375 if(!netdev) {
376 err = -ENOMEM;
377 goto err_alloc_etherdev;
378 }
379
380 SET_MODULE_OWNER(netdev);
381 SET_NETDEV_DEV(netdev, &pdev->dev);
382
383 pci_set_drvdata(pdev, netdev);
384 adapter = netdev->priv;
385 adapter->netdev = netdev;
386 adapter->pdev = pdev;
387 adapter->hw.back = adapter;
388
389 mmio_start = pci_resource_start(pdev, BAR_0);
390 mmio_len = pci_resource_len(pdev, BAR_0);
391
392 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
393 if(!adapter->hw.hw_addr) {
394 err = -EIO;
395 goto err_ioremap;
396 }
397
398 for(i = BAR_1; i <= BAR_5; i++) {
399 if(pci_resource_len(pdev, i) == 0)
400 continue;
401 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
402 adapter->hw.io_base = pci_resource_start(pdev, i);
403 break;
404 }
405 }
406
407 netdev->open = &ixgb_open;
408 netdev->stop = &ixgb_close;
409 netdev->hard_start_xmit = &ixgb_xmit_frame;
410 netdev->get_stats = &ixgb_get_stats;
411 netdev->set_multicast_list = &ixgb_set_multi;
412 netdev->set_mac_address = &ixgb_set_mac;
413 netdev->change_mtu = &ixgb_change_mtu;
414 ixgb_set_ethtool_ops(netdev);
415 netdev->tx_timeout = &ixgb_tx_timeout;
416 netdev->watchdog_timeo = HZ;
417 #ifdef CONFIG_IXGB_NAPI
418 netdev->poll = &ixgb_clean;
419 netdev->weight = 64;
420 #endif
421 netdev->vlan_rx_register = ixgb_vlan_rx_register;
422 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
423 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
424 #ifdef CONFIG_NET_POLL_CONTROLLER
425 netdev->poll_controller = ixgb_netpoll;
426 #endif
427
428 netdev->mem_start = mmio_start;
429 netdev->mem_end = mmio_start + mmio_len;
430 netdev->base_addr = adapter->hw.io_base;
431
432 adapter->bd_number = cards_found;
433 adapter->link_speed = 0;
434 adapter->link_duplex = 0;
435
436 /* setup the private structure */
437
438 if((err = ixgb_sw_init(adapter)))
439 goto err_sw_init;
440
441 netdev->features = NETIF_F_SG |
442 NETIF_F_HW_CSUM |
443 NETIF_F_HW_VLAN_TX |
444 NETIF_F_HW_VLAN_RX |
445 NETIF_F_HW_VLAN_FILTER;
446 #ifdef NETIF_F_TSO
447 netdev->features |= NETIF_F_TSO;
448 #endif
449
450 if(pci_using_dac)
451 netdev->features |= NETIF_F_HIGHDMA;
452
453 /* make sure the EEPROM is good */
454
455 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
456 printk(KERN_ERR "The EEPROM Checksum Is Not Valid\n");
457 err = -EIO;
458 goto err_eeprom;
459 }
460
461 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
462
463 if(!is_valid_ether_addr(netdev->dev_addr)) {
464 err = -EIO;
465 goto err_eeprom;
466 }
467
468 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
469
470 init_timer(&adapter->watchdog_timer);
471 adapter->watchdog_timer.function = &ixgb_watchdog;
472 adapter->watchdog_timer.data = (unsigned long)adapter;
473
474 INIT_WORK(&adapter->tx_timeout_task,
475 (void (*)(void *))ixgb_tx_timeout_task, netdev);
476
477 if((err = register_netdev(netdev)))
478 goto err_register;
479
480 /* we're going to reset, so assume we have no link for now */
481
482 netif_carrier_off(netdev);
483 netif_stop_queue(netdev);
484
485 printk(KERN_INFO "%s: Intel(R) PRO/10GbE Network Connection\n",
486 netdev->name);
487 ixgb_check_options(adapter);
488 /* reset the hardware with the new settings */
489
490 ixgb_reset(adapter);
491
492 cards_found++;
493 return 0;
494
495 err_register:
496 err_sw_init:
497 err_eeprom:
498 iounmap(adapter->hw.hw_addr);
499 err_ioremap:
500 free_netdev(netdev);
501 err_alloc_etherdev:
502 pci_release_regions(pdev);
503 return err;
504 }
505
506 /**
507 * ixgb_remove - Device Removal Routine
508 * @pdev: PCI device information struct
509 *
510 * ixgb_remove is called by the PCI subsystem to alert the driver
511 * that it should release a PCI device. The could be caused by a
512 * Hot-Plug event, or because the driver is going to be removed from
513 * memory.
514 **/
515
516 static void __devexit
517 ixgb_remove(struct pci_dev *pdev)
518 {
519 struct net_device *netdev = pci_get_drvdata(pdev);
520 struct ixgb_adapter *adapter = netdev->priv;
521
522 unregister_netdev(netdev);
523
524 iounmap(adapter->hw.hw_addr);
525 pci_release_regions(pdev);
526
527 free_netdev(netdev);
528 }
529
530 /**
531 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
532 * @adapter: board private structure to initialize
533 *
534 * ixgb_sw_init initializes the Adapter private data structure.
535 * Fields are initialized based on PCI device information and
536 * OS network device settings (MTU size).
537 **/
538
539 static int __devinit
540 ixgb_sw_init(struct ixgb_adapter *adapter)
541 {
542 struct ixgb_hw *hw = &adapter->hw;
543 struct net_device *netdev = adapter->netdev;
544 struct pci_dev *pdev = adapter->pdev;
545
546 /* PCI config space info */
547
548 hw->vendor_id = pdev->vendor;
549 hw->device_id = pdev->device;
550 hw->subsystem_vendor_id = pdev->subsystem_vendor;
551 hw->subsystem_id = pdev->subsystem_device;
552
553 adapter->rx_buffer_len = IXGB_RXBUFFER_2048;
554
555 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
556
557 if((hw->device_id == IXGB_DEVICE_ID_82597EX)
558 ||(hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
559 ||(hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
560 hw->mac_type = ixgb_82597;
561 else {
562 /* should never have loaded on this device */
563 printk(KERN_ERR "ixgb: unsupported device id\n");
564 }
565
566 /* enable flow control to be programmed */
567 hw->fc.send_xon = 1;
568
569 atomic_set(&adapter->irq_sem, 1);
570 spin_lock_init(&adapter->tx_lock);
571
572 return 0;
573 }
574
575 /**
576 * ixgb_open - Called when a network interface is made active
577 * @netdev: network interface device structure
578 *
579 * Returns 0 on success, negative value on failure
580 *
581 * The open entry point is called when a network interface is made
582 * active by the system (IFF_UP). At this point all resources needed
583 * for transmit and receive operations are allocated, the interrupt
584 * handler is registered with the OS, the watchdog timer is started,
585 * and the stack is notified that the interface is ready.
586 **/
587
588 static int
589 ixgb_open(struct net_device *netdev)
590 {
591 struct ixgb_adapter *adapter = netdev->priv;
592 int err;
593
594 /* allocate transmit descriptors */
595
596 if((err = ixgb_setup_tx_resources(adapter)))
597 goto err_setup_tx;
598
599 /* allocate receive descriptors */
600
601 if((err = ixgb_setup_rx_resources(adapter)))
602 goto err_setup_rx;
603
604 if((err = ixgb_up(adapter)))
605 goto err_up;
606
607 return 0;
608
609 err_up:
610 ixgb_free_rx_resources(adapter);
611 err_setup_rx:
612 ixgb_free_tx_resources(adapter);
613 err_setup_tx:
614 ixgb_reset(adapter);
615
616 return err;
617 }
618
619 /**
620 * ixgb_close - Disables a network interface
621 * @netdev: network interface device structure
622 *
623 * Returns 0, this is not allowed to fail
624 *
625 * The close entry point is called when an interface is de-activated
626 * by the OS. The hardware is still under the drivers control, but
627 * needs to be disabled. A global MAC reset is issued to stop the
628 * hardware, and all transmit and receive resources are freed.
629 **/
630
631 static int
632 ixgb_close(struct net_device *netdev)
633 {
634 struct ixgb_adapter *adapter = netdev->priv;
635
636 ixgb_down(adapter, TRUE);
637
638 ixgb_free_tx_resources(adapter);
639 ixgb_free_rx_resources(adapter);
640
641 return 0;
642 }
643
644 /**
645 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
646 * @adapter: board private structure
647 *
648 * Return 0 on success, negative on failure
649 **/
650
651 int
652 ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
653 {
654 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
655 struct pci_dev *pdev = adapter->pdev;
656 int size;
657
658 size = sizeof(struct ixgb_buffer) * txdr->count;
659 txdr->buffer_info = vmalloc(size);
660 if(!txdr->buffer_info) {
661 return -ENOMEM;
662 }
663 memset(txdr->buffer_info, 0, size);
664
665 /* round up to nearest 4K */
666
667 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
668 IXGB_ROUNDUP(txdr->size, 4096);
669
670 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
671 if(!txdr->desc) {
672 vfree(txdr->buffer_info);
673 return -ENOMEM;
674 }
675 memset(txdr->desc, 0, txdr->size);
676
677 txdr->next_to_use = 0;
678 txdr->next_to_clean = 0;
679
680 return 0;
681 }
682
683 /**
684 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
685 * @adapter: board private structure
686 *
687 * Configure the Tx unit of the MAC after a reset.
688 **/
689
690 static void
691 ixgb_configure_tx(struct ixgb_adapter *adapter)
692 {
693 uint64_t tdba = adapter->tx_ring.dma;
694 uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
695 uint32_t tctl;
696 struct ixgb_hw *hw = &adapter->hw;
697
698 /* Setup the Base and Length of the Tx Descriptor Ring
699 * tx_ring.dma can be either a 32 or 64 bit value
700 */
701
702 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
703 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
704
705 IXGB_WRITE_REG(hw, TDLEN, tdlen);
706
707 /* Setup the HW Tx Head and Tail descriptor pointers */
708
709 IXGB_WRITE_REG(hw, TDH, 0);
710 IXGB_WRITE_REG(hw, TDT, 0);
711
712 /* don't set up txdctl, it induces performance problems if
713 * configured incorrectly
714 txdctl = TXDCTL_PTHRESH_DEFAULT; // prefetch txds below this threshold
715 txdctl |= (TXDCTL_HTHRESH_DEFAULT // only prefetch if there are this many ready
716 << IXGB_TXDCTL_HTHRESH_SHIFT);
717 IXGB_WRITE_REG (hw, TXDCTL, txdctl);
718 */
719
720 /* Set the Tx Interrupt Delay register */
721
722 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
723
724 /* Program the Transmit Control Register */
725
726 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
727 IXGB_WRITE_REG(hw, TCTL, tctl);
728
729 /* Setup Transmit Descriptor Settings for this adapter */
730 adapter->tx_cmd_type =
731 IXGB_TX_DESC_TYPE
732 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
733 }
734
735 /**
736 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
737 * @adapter: board private structure
738 *
739 * Returns 0 on success, negative on failure
740 **/
741
742 int
743 ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
744 {
745 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
746 struct pci_dev *pdev = adapter->pdev;
747 int size;
748
749 size = sizeof(struct ixgb_buffer) * rxdr->count;
750 rxdr->buffer_info = vmalloc(size);
751 if(!rxdr->buffer_info) {
752 return -ENOMEM;
753 }
754 memset(rxdr->buffer_info, 0, size);
755
756 /* Round up to nearest 4K */
757
758 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
759 IXGB_ROUNDUP(rxdr->size, 4096);
760
761 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
762
763 if(!rxdr->desc) {
764 vfree(rxdr->buffer_info);
765 return -ENOMEM;
766 }
767 memset(rxdr->desc, 0, rxdr->size);
768
769 rxdr->next_to_clean = 0;
770 rxdr->next_to_use = 0;
771
772 return 0;
773 }
774
775 /**
776 * ixgb_setup_rctl - configure the receive control register
777 * @adapter: Board private structure
778 **/
779
780 static void
781 ixgb_setup_rctl(struct ixgb_adapter *adapter)
782 {
783 uint32_t rctl;
784
785 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
786
787 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
788
789 rctl |=
790 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
791 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
792 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
793
794 rctl |= IXGB_RCTL_SECRC;
795
796 switch (adapter->rx_buffer_len) {
797 case IXGB_RXBUFFER_2048:
798 default:
799 rctl |= IXGB_RCTL_BSIZE_2048;
800 break;
801 case IXGB_RXBUFFER_4096:
802 rctl |= IXGB_RCTL_BSIZE_4096;
803 break;
804 case IXGB_RXBUFFER_8192:
805 rctl |= IXGB_RCTL_BSIZE_8192;
806 break;
807 case IXGB_RXBUFFER_16384:
808 rctl |= IXGB_RCTL_BSIZE_16384;
809 break;
810 }
811
812 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
813 }
814
815 /**
816 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
817 * @adapter: board private structure
818 *
819 * Configure the Rx unit of the MAC after a reset.
820 **/
821
822 static void
823 ixgb_configure_rx(struct ixgb_adapter *adapter)
824 {
825 uint64_t rdba = adapter->rx_ring.dma;
826 uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
827 struct ixgb_hw *hw = &adapter->hw;
828 uint32_t rctl;
829 uint32_t rxcsum;
830 uint32_t rxdctl;
831
832 /* make sure receives are disabled while setting up the descriptors */
833
834 rctl = IXGB_READ_REG(hw, RCTL);
835 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
836
837 /* set the Receive Delay Timer Register */
838
839 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
840
841 /* Setup the Base and Length of the Rx Descriptor Ring */
842
843 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
844 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
845
846 IXGB_WRITE_REG(hw, RDLEN, rdlen);
847
848 /* Setup the HW Rx Head and Tail Descriptor Pointers */
849 IXGB_WRITE_REG(hw, RDH, 0);
850 IXGB_WRITE_REG(hw, RDT, 0);
851
852 /* burst 16 or burst when RXT0*/
853 rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT
854 | RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT
855 | RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
856 IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
857
858 /* Enable Receive Checksum Offload for TCP and UDP */
859 if(adapter->rx_csum == TRUE) {
860 rxcsum = IXGB_READ_REG(hw, RXCSUM);
861 rxcsum |= IXGB_RXCSUM_TUOFL;
862 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
863 }
864
865 /* Enable Receives */
866
867 IXGB_WRITE_REG(hw, RCTL, rctl);
868 }
869
870 /**
871 * ixgb_free_tx_resources - Free Tx Resources
872 * @adapter: board private structure
873 *
874 * Free all transmit software resources
875 **/
876
877 void
878 ixgb_free_tx_resources(struct ixgb_adapter *adapter)
879 {
880 struct pci_dev *pdev = adapter->pdev;
881
882 ixgb_clean_tx_ring(adapter);
883
884 vfree(adapter->tx_ring.buffer_info);
885 adapter->tx_ring.buffer_info = NULL;
886
887 pci_free_consistent(pdev, adapter->tx_ring.size,
888 adapter->tx_ring.desc, adapter->tx_ring.dma);
889
890 adapter->tx_ring.desc = NULL;
891 }
892
893 static inline void
894 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
895 struct ixgb_buffer *buffer_info)
896 {
897 struct pci_dev *pdev = adapter->pdev;
898 if(buffer_info->dma) {
899 pci_unmap_page(pdev,
900 buffer_info->dma,
901 buffer_info->length,
902 PCI_DMA_TODEVICE);
903 buffer_info->dma = 0;
904 }
905 if(buffer_info->skb) {
906 dev_kfree_skb_any(buffer_info->skb);
907 buffer_info->skb = NULL;
908 }
909 }
910
911 /**
912 * ixgb_clean_tx_ring - Free Tx Buffers
913 * @adapter: board private structure
914 **/
915
916 static void
917 ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
918 {
919 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
920 struct ixgb_buffer *buffer_info;
921 unsigned long size;
922 unsigned int i;
923
924 /* Free all the Tx ring sk_buffs */
925
926 for(i = 0; i < tx_ring->count; i++) {
927 buffer_info = &tx_ring->buffer_info[i];
928 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
929 }
930
931 size = sizeof(struct ixgb_buffer) * tx_ring->count;
932 memset(tx_ring->buffer_info, 0, size);
933
934 /* Zero out the descriptor ring */
935
936 memset(tx_ring->desc, 0, tx_ring->size);
937
938 tx_ring->next_to_use = 0;
939 tx_ring->next_to_clean = 0;
940
941 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
942 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
943 }
944
945 /**
946 * ixgb_free_rx_resources - Free Rx Resources
947 * @adapter: board private structure
948 *
949 * Free all receive software resources
950 **/
951
952 void
953 ixgb_free_rx_resources(struct ixgb_adapter *adapter)
954 {
955 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
956 struct pci_dev *pdev = adapter->pdev;
957
958 ixgb_clean_rx_ring(adapter);
959
960 vfree(rx_ring->buffer_info);
961 rx_ring->buffer_info = NULL;
962
963 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
964
965 rx_ring->desc = NULL;
966 }
967
968 /**
969 * ixgb_clean_rx_ring - Free Rx Buffers
970 * @adapter: board private structure
971 **/
972
973 static void
974 ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
975 {
976 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
977 struct ixgb_buffer *buffer_info;
978 struct pci_dev *pdev = adapter->pdev;
979 unsigned long size;
980 unsigned int i;
981
982 /* Free all the Rx ring sk_buffs */
983
984 for(i = 0; i < rx_ring->count; i++) {
985 buffer_info = &rx_ring->buffer_info[i];
986 if(buffer_info->skb) {
987
988 pci_unmap_single(pdev,
989 buffer_info->dma,
990 buffer_info->length,
991 PCI_DMA_FROMDEVICE);
992
993 dev_kfree_skb(buffer_info->skb);
994
995 buffer_info->skb = NULL;
996 }
997 }
998
999 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1000 memset(rx_ring->buffer_info, 0, size);
1001
1002 /* Zero out the descriptor ring */
1003
1004 memset(rx_ring->desc, 0, rx_ring->size);
1005
1006 rx_ring->next_to_clean = 0;
1007 rx_ring->next_to_use = 0;
1008
1009 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1010 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1011 }
1012
1013 /**
1014 * ixgb_set_mac - Change the Ethernet Address of the NIC
1015 * @netdev: network interface device structure
1016 * @p: pointer to an address structure
1017 *
1018 * Returns 0 on success, negative on failure
1019 **/
1020
1021 static int
1022 ixgb_set_mac(struct net_device *netdev, void *p)
1023 {
1024 struct ixgb_adapter *adapter = netdev->priv;
1025 struct sockaddr *addr = p;
1026
1027 if(!is_valid_ether_addr(addr->sa_data))
1028 return -EADDRNOTAVAIL;
1029
1030 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1031
1032 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1033
1034 return 0;
1035 }
1036
1037 /**
1038 * ixgb_set_multi - Multicast and Promiscuous mode set
1039 * @netdev: network interface device structure
1040 *
1041 * The set_multi entry point is called whenever the multicast address
1042 * list or the network interface flags are updated. This routine is
1043 * responsible for configuring the hardware for proper multicast,
1044 * promiscuous mode, and all-multi behavior.
1045 **/
1046
1047 static void
1048 ixgb_set_multi(struct net_device *netdev)
1049 {
1050 struct ixgb_adapter *adapter = netdev->priv;
1051 struct ixgb_hw *hw = &adapter->hw;
1052 struct dev_mc_list *mc_ptr;
1053 uint32_t rctl;
1054 int i;
1055
1056 /* Check for Promiscuous and All Multicast modes */
1057
1058 rctl = IXGB_READ_REG(hw, RCTL);
1059
1060 if(netdev->flags & IFF_PROMISC) {
1061 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1062 } else if(netdev->flags & IFF_ALLMULTI) {
1063 rctl |= IXGB_RCTL_MPE;
1064 rctl &= ~IXGB_RCTL_UPE;
1065 } else {
1066 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1067 }
1068
1069 if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1070 rctl |= IXGB_RCTL_MPE;
1071 IXGB_WRITE_REG(hw, RCTL, rctl);
1072 } else {
1073 uint8_t mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS];
1074
1075 IXGB_WRITE_REG(hw, RCTL, rctl);
1076
1077 for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
1078 i++, mc_ptr = mc_ptr->next)
1079 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
1080 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1081
1082 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1083 }
1084 }
1085
1086 /**
1087 * ixgb_watchdog - Timer Call-back
1088 * @data: pointer to netdev cast into an unsigned long
1089 **/
1090
1091 static void
1092 ixgb_watchdog(unsigned long data)
1093 {
1094 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1095 struct net_device *netdev = adapter->netdev;
1096 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1097 unsigned int i;
1098
1099 ixgb_check_for_link(&adapter->hw);
1100
1101 if (ixgb_check_for_bad_link(&adapter->hw)) {
1102 /* force the reset path */
1103 netif_stop_queue(netdev);
1104 }
1105
1106 if(adapter->hw.link_up) {
1107 if(!netif_carrier_ok(netdev)) {
1108 printk(KERN_INFO "ixgb: %s NIC Link is Up %d Mbps %s\n",
1109 netdev->name, 10000, "Full Duplex");
1110 adapter->link_speed = 10000;
1111 adapter->link_duplex = FULL_DUPLEX;
1112 netif_carrier_on(netdev);
1113 netif_wake_queue(netdev);
1114 }
1115 } else {
1116 if(netif_carrier_ok(netdev)) {
1117 adapter->link_speed = 0;
1118 adapter->link_duplex = 0;
1119 printk(KERN_INFO
1120 "ixgb: %s NIC Link is Down\n",
1121 netdev->name);
1122 netif_carrier_off(netdev);
1123 netif_stop_queue(netdev);
1124
1125 }
1126 }
1127
1128 ixgb_update_stats(adapter);
1129
1130 if(!netif_carrier_ok(netdev)) {
1131 if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1132 /* We've lost link, so the controller stops DMA,
1133 * but we've got queued Tx work that's never going
1134 * to get done, so reset controller to flush Tx.
1135 * (Do the reset outside of interrupt context). */
1136 schedule_work(&adapter->tx_timeout_task);
1137 }
1138 }
1139
1140 /* Early detection of hung controller */
1141 i = txdr->next_to_clean;
1142 if(txdr->buffer_info[i].dma &&
1143 time_after(jiffies, txdr->buffer_info[i].time_stamp + HZ) &&
1144 !(IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_TXOFF))
1145 netif_stop_queue(netdev);
1146
1147 /* generate an interrupt to force clean up of any stragglers */
1148 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1149
1150 /* Reset the timer */
1151 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1152 }
1153
1154 #define IXGB_TX_FLAGS_CSUM 0x00000001
1155 #define IXGB_TX_FLAGS_VLAN 0x00000002
1156 #define IXGB_TX_FLAGS_TSO 0x00000004
1157
1158 static inline boolean_t
1159 ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1160 {
1161 #ifdef NETIF_F_TSO
1162 struct ixgb_context_desc *context_desc;
1163 unsigned int i;
1164 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1165 uint16_t ipcse, tucse, mss;
1166
1167 if(likely(skb_shinfo(skb)->tso_size)) {
1168 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
1169 mss = skb_shinfo(skb)->tso_size;
1170 skb->nh.iph->tot_len = 0;
1171 skb->nh.iph->check = 0;
1172 skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr,
1173 skb->nh.iph->daddr,
1174 0, IPPROTO_TCP, 0);
1175 ipcss = skb->nh.raw - skb->data;
1176 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
1177 ipcse = skb->h.raw - skb->data - 1;
1178 tucss = skb->h.raw - skb->data;
1179 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
1180 tucse = 0;
1181
1182 i = adapter->tx_ring.next_to_use;
1183 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1184
1185 context_desc->ipcss = ipcss;
1186 context_desc->ipcso = ipcso;
1187 context_desc->ipcse = cpu_to_le16(ipcse);
1188 context_desc->tucss = tucss;
1189 context_desc->tucso = tucso;
1190 context_desc->tucse = cpu_to_le16(tucse);
1191 context_desc->mss = cpu_to_le16(mss);
1192 context_desc->hdr_len = hdr_len;
1193 context_desc->status = 0;
1194 context_desc->cmd_type_len = cpu_to_le32(
1195 IXGB_CONTEXT_DESC_TYPE
1196 | IXGB_CONTEXT_DESC_CMD_TSE
1197 | IXGB_CONTEXT_DESC_CMD_IP
1198 | IXGB_CONTEXT_DESC_CMD_TCP
1199 | IXGB_CONTEXT_DESC_CMD_RS
1200 | IXGB_CONTEXT_DESC_CMD_IDE
1201 | (skb->len - (hdr_len)));
1202
1203 if(++i == adapter->tx_ring.count) i = 0;
1204 adapter->tx_ring.next_to_use = i;
1205
1206 return TRUE;
1207 }
1208 #endif
1209
1210 return FALSE;
1211 }
1212
1213 static inline boolean_t
1214 ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1215 {
1216 struct ixgb_context_desc *context_desc;
1217 unsigned int i;
1218 uint8_t css, cso;
1219
1220 if(likely(skb->ip_summed == CHECKSUM_HW)) {
1221 css = skb->h.raw - skb->data;
1222 cso = (skb->h.raw + skb->csum) - skb->data;
1223
1224 i = adapter->tx_ring.next_to_use;
1225 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1226
1227 context_desc->tucss = css;
1228 context_desc->tucso = cso;
1229 context_desc->tucse = 0;
1230 /* zero out any previously existing data in one instruction */
1231 *(uint32_t *)&(context_desc->ipcss) = 0;
1232 context_desc->status = 0;
1233 context_desc->hdr_len = 0;
1234 context_desc->mss = 0;
1235 context_desc->cmd_type_len =
1236 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1237 | IXGB_TX_DESC_CMD_RS
1238 | IXGB_TX_DESC_CMD_IDE);
1239
1240 if(++i == adapter->tx_ring.count) i = 0;
1241 adapter->tx_ring.next_to_use = i;
1242
1243 return TRUE;
1244 }
1245
1246 return FALSE;
1247 }
1248
1249 #define IXGB_MAX_TXD_PWR 14
1250 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1251
1252 static inline int
1253 ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1254 unsigned int first)
1255 {
1256 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1257 struct ixgb_buffer *buffer_info;
1258 int len = skb->len;
1259 unsigned int offset = 0, size, count = 0, i;
1260
1261 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1262 unsigned int f;
1263 len -= skb->data_len;
1264
1265 i = tx_ring->next_to_use;
1266
1267 while(len) {
1268 buffer_info = &tx_ring->buffer_info[i];
1269 size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE);
1270 buffer_info->length = size;
1271 buffer_info->dma =
1272 pci_map_single(adapter->pdev,
1273 skb->data + offset,
1274 size,
1275 PCI_DMA_TODEVICE);
1276 buffer_info->time_stamp = jiffies;
1277
1278 len -= size;
1279 offset += size;
1280 count++;
1281 if(++i == tx_ring->count) i = 0;
1282 }
1283
1284 for(f = 0; f < nr_frags; f++) {
1285 struct skb_frag_struct *frag;
1286
1287 frag = &skb_shinfo(skb)->frags[f];
1288 len = frag->size;
1289 offset = 0;
1290
1291 while(len) {
1292 buffer_info = &tx_ring->buffer_info[i];
1293 size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE);
1294 buffer_info->length = size;
1295 buffer_info->dma =
1296 pci_map_page(adapter->pdev,
1297 frag->page,
1298 frag->page_offset + offset,
1299 size,
1300 PCI_DMA_TODEVICE);
1301 buffer_info->time_stamp = jiffies;
1302
1303 len -= size;
1304 offset += size;
1305 count++;
1306 if(++i == tx_ring->count) i = 0;
1307 }
1308 }
1309 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1310 tx_ring->buffer_info[i].skb = skb;
1311 tx_ring->buffer_info[first].next_to_watch = i;
1312
1313 return count;
1314 }
1315
1316 static inline void
1317 ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1318 {
1319 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1320 struct ixgb_tx_desc *tx_desc = NULL;
1321 struct ixgb_buffer *buffer_info;
1322 uint32_t cmd_type_len = adapter->tx_cmd_type;
1323 uint8_t status = 0;
1324 uint8_t popts = 0;
1325 unsigned int i;
1326
1327 if(tx_flags & IXGB_TX_FLAGS_TSO) {
1328 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1329 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1330 }
1331
1332 if(tx_flags & IXGB_TX_FLAGS_CSUM)
1333 popts |= IXGB_TX_DESC_POPTS_TXSM;
1334
1335 if(tx_flags & IXGB_TX_FLAGS_VLAN) {
1336 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1337 }
1338
1339 i = tx_ring->next_to_use;
1340
1341 while(count--) {
1342 buffer_info = &tx_ring->buffer_info[i];
1343 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1344 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1345 tx_desc->cmd_type_len =
1346 cpu_to_le32(cmd_type_len | buffer_info->length);
1347 tx_desc->status = status;
1348 tx_desc->popts = popts;
1349 tx_desc->vlan = cpu_to_le16(vlan_id);
1350
1351 if(++i == tx_ring->count) i = 0;
1352 }
1353
1354 tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1355 | IXGB_TX_DESC_CMD_RS );
1356
1357 /* Force memory writes to complete before letting h/w
1358 * know there are new descriptors to fetch. (Only
1359 * applicable for weak-ordered memory model archs,
1360 * such as IA-64). */
1361 wmb();
1362
1363 tx_ring->next_to_use = i;
1364 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1365 }
1366
1367 /* Tx Descriptors needed, worst case */
1368 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1369 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1370 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \
1371 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1
1372
1373 static int
1374 ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1375 {
1376 struct ixgb_adapter *adapter = netdev->priv;
1377 unsigned int first;
1378 unsigned int tx_flags = 0;
1379 unsigned long flags;
1380 int vlan_id = 0;
1381
1382 if(skb->len <= 0) {
1383 dev_kfree_skb_any(skb);
1384 return 0;
1385 }
1386
1387 spin_lock_irqsave(&adapter->tx_lock, flags);
1388 if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) {
1389 netif_stop_queue(netdev);
1390 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1391 return 1;
1392 }
1393 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1394
1395 if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
1396 tx_flags |= IXGB_TX_FLAGS_VLAN;
1397 vlan_id = vlan_tx_tag_get(skb);
1398 }
1399
1400 first = adapter->tx_ring.next_to_use;
1401
1402 if(ixgb_tso(adapter, skb))
1403 tx_flags |= IXGB_TX_FLAGS_TSO;
1404 else if(ixgb_tx_csum(adapter, skb))
1405 tx_flags |= IXGB_TX_FLAGS_CSUM;
1406
1407 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1408 tx_flags);
1409
1410 netdev->trans_start = jiffies;
1411
1412 return 0;
1413 }
1414
1415 /**
1416 * ixgb_tx_timeout - Respond to a Tx Hang
1417 * @netdev: network interface device structure
1418 **/
1419
1420 static void
1421 ixgb_tx_timeout(struct net_device *netdev)
1422 {
1423 struct ixgb_adapter *adapter = netdev->priv;
1424
1425 /* Do the reset outside of interrupt context */
1426 schedule_work(&adapter->tx_timeout_task);
1427 }
1428
1429 static void
1430 ixgb_tx_timeout_task(struct net_device *netdev)
1431 {
1432 struct ixgb_adapter *adapter = netdev->priv;
1433
1434 ixgb_down(adapter, TRUE);
1435 ixgb_up(adapter);
1436 }
1437
1438 /**
1439 * ixgb_get_stats - Get System Network Statistics
1440 * @netdev: network interface device structure
1441 *
1442 * Returns the address of the device statistics structure.
1443 * The statistics are actually updated from the timer callback.
1444 **/
1445
1446 static struct net_device_stats *
1447 ixgb_get_stats(struct net_device *netdev)
1448 {
1449 struct ixgb_adapter *adapter = netdev->priv;
1450
1451 return &adapter->net_stats;
1452 }
1453
1454 /**
1455 * ixgb_change_mtu - Change the Maximum Transfer Unit
1456 * @netdev: network interface device structure
1457 * @new_mtu: new value for maximum frame size
1458 *
1459 * Returns 0 on success, negative on failure
1460 **/
1461
1462 static int
1463 ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1464 {
1465 struct ixgb_adapter *adapter = netdev->priv;
1466 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1467 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1468
1469
1470 if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1471 || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
1472 IXGB_ERR("Invalid MTU setting\n");
1473 return -EINVAL;
1474 }
1475
1476 if((max_frame <= IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1477 || (max_frame <= IXGB_RXBUFFER_2048)) {
1478 adapter->rx_buffer_len = IXGB_RXBUFFER_2048;
1479
1480 } else if(max_frame <= IXGB_RXBUFFER_4096) {
1481 adapter->rx_buffer_len = IXGB_RXBUFFER_4096;
1482
1483 } else if(max_frame <= IXGB_RXBUFFER_8192) {
1484 adapter->rx_buffer_len = IXGB_RXBUFFER_8192;
1485
1486 } else {
1487 adapter->rx_buffer_len = IXGB_RXBUFFER_16384;
1488 }
1489
1490 netdev->mtu = new_mtu;
1491
1492 if(old_max_frame != max_frame && netif_running(netdev)) {
1493
1494 ixgb_down(adapter, TRUE);
1495 ixgb_up(adapter);
1496 }
1497
1498 return 0;
1499 }
1500
1501 /**
1502 * ixgb_update_stats - Update the board statistics counters.
1503 * @adapter: board private structure
1504 **/
1505
1506 void
1507 ixgb_update_stats(struct ixgb_adapter *adapter)
1508 {
1509 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1510 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1511 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1512 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1513 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1514 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1515 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1516 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1517 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1518 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1519 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1520 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1521 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1522 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1523 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1524 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1525 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1526 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1527 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1528 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1529 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1530 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1531 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1532 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1533 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1534 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1535 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1536 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1537 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1538 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1539 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1540 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1541 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1542 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1543 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1544 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1545 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1546 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1547 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1548 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1549 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1550 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1551 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1552 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1553 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1554 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1555 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1556 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1557 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1558 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1559 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1560 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1561 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1562 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1563 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1564 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1565 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1566 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1567 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1568 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1569
1570 /* Fill out the OS statistics structure */
1571
1572 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1573 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1574 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1575 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1576 adapter->net_stats.multicast = adapter->stats.mprcl;
1577 adapter->net_stats.collisions = 0;
1578
1579 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1580 * with a length in the type/len field */
1581 adapter->net_stats.rx_errors =
1582 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1583 adapter->stats.ruc +
1584 adapter->stats.roc /*+ adapter->stats.rlec */ +
1585 adapter->stats.icbc +
1586 adapter->stats.ecbc + adapter->stats.mpc;
1587
1588 adapter->net_stats.rx_dropped = adapter->stats.mpc;
1589
1590 /* see above
1591 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1592 */
1593
1594 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1595 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1596 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1597 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1598
1599 adapter->net_stats.tx_errors = 0;
1600 adapter->net_stats.rx_frame_errors = 0;
1601 adapter->net_stats.tx_aborted_errors = 0;
1602 adapter->net_stats.tx_carrier_errors = 0;
1603 adapter->net_stats.tx_fifo_errors = 0;
1604 adapter->net_stats.tx_heartbeat_errors = 0;
1605 adapter->net_stats.tx_window_errors = 0;
1606 }
1607
1608 #define IXGB_MAX_INTR 10
1609 /**
1610 * ixgb_intr - Interrupt Handler
1611 * @irq: interrupt number
1612 * @data: pointer to a network interface device structure
1613 * @pt_regs: CPU registers structure
1614 **/
1615
1616 static irqreturn_t
1617 ixgb_intr(int irq, void *data, struct pt_regs *regs)
1618 {
1619 struct net_device *netdev = data;
1620 struct ixgb_adapter *adapter = netdev->priv;
1621 struct ixgb_hw *hw = &adapter->hw;
1622 uint32_t icr = IXGB_READ_REG(hw, ICR);
1623 #ifndef CONFIG_IXGB_NAPI
1624 unsigned int i;
1625 #endif
1626
1627 if(unlikely(!icr))
1628 return IRQ_NONE; /* Not our interrupt */
1629
1630 if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) {
1631 mod_timer(&adapter->watchdog_timer, jiffies);
1632 }
1633
1634 #ifdef CONFIG_IXGB_NAPI
1635 if(netif_rx_schedule_prep(netdev)) {
1636
1637 /* Disable interrupts and register for poll. The flush
1638 of the posted write is intentionally left out.
1639 */
1640
1641 atomic_inc(&adapter->irq_sem);
1642 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
1643 __netif_rx_schedule(netdev);
1644 }
1645 #else
1646 /* yes, that is actually a & and it is meant to make sure that
1647 * every pass through this for loop checks both receive and
1648 * transmit queues for completed descriptors, intended to
1649 * avoid starvation issues and assist tx/rx fairness. */
1650 for(i = 0; i < IXGB_MAX_INTR; i++)
1651 if(!ixgb_clean_rx_irq(adapter) &
1652 !ixgb_clean_tx_irq(adapter))
1653 break;
1654 #endif
1655 return IRQ_HANDLED;
1656 }
1657
1658 #ifdef CONFIG_IXGB_NAPI
1659 /**
1660 * ixgb_clean - NAPI Rx polling callback
1661 * @adapter: board private structure
1662 **/
1663
1664 static int
1665 ixgb_clean(struct net_device *netdev, int *budget)
1666 {
1667 struct ixgb_adapter *adapter = netdev->priv;
1668 int work_to_do = min(*budget, netdev->quota);
1669 int tx_cleaned;
1670 int work_done = 0;
1671
1672 if (!netif_carrier_ok(netdev))
1673 goto quit_polling;
1674
1675 tx_cleaned = ixgb_clean_tx_irq(adapter);
1676 ixgb_clean_rx_irq(adapter, &work_done, work_to_do);
1677
1678 *budget -= work_done;
1679 netdev->quota -= work_done;
1680
1681 /* if no Tx cleanup and not enough Rx work done, exit the polling mode */
1682 if((!tx_cleaned && (work_done < work_to_do)) ||
1683 !netif_running(netdev)) {
1684 quit_polling: netif_rx_complete(netdev);
1685 ixgb_irq_enable(adapter);
1686 return 0;
1687 }
1688
1689 return 1;
1690 }
1691 #endif
1692
1693 /**
1694 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1695 * @adapter: board private structure
1696 **/
1697
1698 static boolean_t
1699 ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1700 {
1701 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1702 struct net_device *netdev = adapter->netdev;
1703 struct ixgb_tx_desc *tx_desc, *eop_desc;
1704 struct ixgb_buffer *buffer_info;
1705 unsigned int i, eop;
1706 boolean_t cleaned = FALSE;
1707
1708 i = tx_ring->next_to_clean;
1709 eop = tx_ring->buffer_info[i].next_to_watch;
1710 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1711
1712 while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1713
1714 for(cleaned = FALSE; !cleaned; ) {
1715 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1716 buffer_info = &tx_ring->buffer_info[i];
1717
1718 if (tx_desc->popts
1719 & (IXGB_TX_DESC_POPTS_TXSM |
1720 IXGB_TX_DESC_POPTS_IXSM))
1721 adapter->hw_csum_tx_good++;
1722
1723 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1724
1725 *(uint32_t *)&(tx_desc->status) = 0;
1726
1727 cleaned = (i == eop);
1728 if(++i == tx_ring->count) i = 0;
1729 }
1730
1731 eop = tx_ring->buffer_info[i].next_to_watch;
1732 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1733 }
1734
1735 tx_ring->next_to_clean = i;
1736
1737 spin_lock(&adapter->tx_lock);
1738 if(cleaned && netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
1739 (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) {
1740
1741 netif_wake_queue(netdev);
1742 }
1743 spin_unlock(&adapter->tx_lock);
1744
1745 return cleaned;
1746 }
1747
1748 /**
1749 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1750 * @adapter: board private structure
1751 * @rx_desc: receive descriptor
1752 * @sk_buff: socket buffer with received data
1753 **/
1754
1755 static inline void
1756 ixgb_rx_checksum(struct ixgb_adapter *adapter,
1757 struct ixgb_rx_desc *rx_desc,
1758 struct sk_buff *skb)
1759 {
1760 /* Ignore Checksum bit is set OR
1761 * TCP Checksum has not been calculated
1762 */
1763 if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1764 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1765 skb->ip_summed = CHECKSUM_NONE;
1766 return;
1767 }
1768
1769 /* At this point we know the hardware did the TCP checksum */
1770 /* now look at the TCP checksum error bit */
1771 if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1772 /* let the stack verify checksum errors */
1773 skb->ip_summed = CHECKSUM_NONE;
1774 adapter->hw_csum_rx_error++;
1775 } else {
1776 /* TCP checksum is good */
1777 skb->ip_summed = CHECKSUM_UNNECESSARY;
1778 adapter->hw_csum_rx_good++;
1779 }
1780 }
1781
1782 /**
1783 * ixgb_clean_rx_irq - Send received data up the network stack,
1784 * @adapter: board private structure
1785 **/
1786
1787 static boolean_t
1788 #ifdef CONFIG_IXGB_NAPI
1789 ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1790 #else
1791 ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1792 #endif
1793 {
1794 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1795 struct net_device *netdev = adapter->netdev;
1796 struct pci_dev *pdev = adapter->pdev;
1797 struct ixgb_rx_desc *rx_desc, *next_rxd;
1798 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
1799 struct sk_buff *skb, *next_skb;
1800 uint32_t length;
1801 unsigned int i, j;
1802 boolean_t cleaned = FALSE;
1803
1804 i = rx_ring->next_to_clean;
1805 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1806 buffer_info = &rx_ring->buffer_info[i];
1807
1808 while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
1809
1810 #ifdef CONFIG_IXGB_NAPI
1811 if(*work_done >= work_to_do)
1812 break;
1813
1814 (*work_done)++;
1815 #endif
1816 skb = buffer_info->skb;
1817 prefetch(skb->data);
1818
1819 if(++i == rx_ring->count) i = 0;
1820 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1821 prefetch(next_rxd);
1822
1823 if((j = i + 1) == rx_ring->count) j = 0;
1824 next2_buffer = &rx_ring->buffer_info[j];
1825 prefetch(next2_buffer);
1826
1827 next_buffer = &rx_ring->buffer_info[i];
1828 next_skb = next_buffer->skb;
1829 prefetch(next_skb);
1830
1831
1832 cleaned = TRUE;
1833
1834 pci_unmap_single(pdev,
1835 buffer_info->dma,
1836 buffer_info->length,
1837 PCI_DMA_FROMDEVICE);
1838
1839 length = le16_to_cpu(rx_desc->length);
1840
1841 if(unlikely(!(rx_desc->status & IXGB_RX_DESC_STATUS_EOP))) {
1842
1843 /* All receives must fit into a single buffer */
1844
1845 IXGB_DBG("Receive packet consumed multiple buffers "
1846 "length<%x>\n", length);
1847
1848 dev_kfree_skb_irq(skb);
1849 rx_desc->status = 0;
1850 buffer_info->skb = NULL;
1851
1852 rx_desc = next_rxd;
1853 buffer_info = next_buffer;
1854 continue;
1855 }
1856
1857 if (unlikely(rx_desc->errors
1858 & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
1859 | IXGB_RX_DESC_ERRORS_P |
1860 IXGB_RX_DESC_ERRORS_RXE))) {
1861
1862 dev_kfree_skb_irq(skb);
1863 rx_desc->status = 0;
1864 buffer_info->skb = NULL;
1865
1866 rx_desc = next_rxd;
1867 buffer_info = next_buffer;
1868 continue;
1869 }
1870
1871 /* Good Receive */
1872 skb_put(skb, length);
1873
1874 /* Receive Checksum Offload */
1875 ixgb_rx_checksum(adapter, rx_desc, skb);
1876
1877 skb->protocol = eth_type_trans(skb, netdev);
1878 #ifdef CONFIG_IXGB_NAPI
1879 if(adapter->vlgrp && (rx_desc->status & IXGB_RX_DESC_STATUS_VP)) {
1880 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
1881 le16_to_cpu(rx_desc->special) &
1882 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
1883 } else {
1884 netif_receive_skb(skb);
1885 }
1886 #else /* CONFIG_IXGB_NAPI */
1887 if(adapter->vlgrp && (rx_desc->status & IXGB_RX_DESC_STATUS_VP)) {
1888 vlan_hwaccel_rx(skb, adapter->vlgrp,
1889 le16_to_cpu(rx_desc->special) &
1890 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
1891 } else {
1892 netif_rx(skb);
1893 }
1894 #endif /* CONFIG_IXGB_NAPI */
1895 netdev->last_rx = jiffies;
1896
1897 rx_desc->status = 0;
1898 buffer_info->skb = NULL;
1899
1900 rx_desc = next_rxd;
1901 buffer_info = next_buffer;
1902 }
1903
1904 rx_ring->next_to_clean = i;
1905
1906 ixgb_alloc_rx_buffers(adapter);
1907
1908 return cleaned;
1909 }
1910
1911 /**
1912 * ixgb_alloc_rx_buffers - Replace used receive buffers
1913 * @adapter: address of board private structure
1914 **/
1915
1916 static void
1917 ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
1918 {
1919 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1920 struct net_device *netdev = adapter->netdev;
1921 struct pci_dev *pdev = adapter->pdev;
1922 struct ixgb_rx_desc *rx_desc;
1923 struct ixgb_buffer *buffer_info;
1924 struct sk_buff *skb;
1925 unsigned int i;
1926 int num_group_tail_writes;
1927 long cleancount;
1928
1929 i = rx_ring->next_to_use;
1930 buffer_info = &rx_ring->buffer_info[i];
1931 cleancount = IXGB_DESC_UNUSED(rx_ring);
1932
1933 num_group_tail_writes = IXGB_RX_BUFFER_WRITE;
1934
1935 /* leave one descriptor unused */
1936 while(--cleancount > 0) {
1937 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1938
1939 skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
1940
1941 if(unlikely(!skb)) {
1942 /* Better luck next round */
1943 break;
1944 }
1945
1946 /* Make buffer alignment 2 beyond a 16 byte boundary
1947 * this will result in a 16 byte aligned IP header after
1948 * the 14 byte MAC header is removed
1949 */
1950 skb_reserve(skb, NET_IP_ALIGN);
1951
1952 skb->dev = netdev;
1953
1954 buffer_info->skb = skb;
1955 buffer_info->length = adapter->rx_buffer_len;
1956 buffer_info->dma =
1957 pci_map_single(pdev,
1958 skb->data,
1959 adapter->rx_buffer_len,
1960 PCI_DMA_FROMDEVICE);
1961
1962 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1963
1964 if((i & ~(num_group_tail_writes- 1)) == i) {
1965 /* Force memory writes to complete before letting h/w
1966 * know there are new descriptors to fetch. (Only
1967 * applicable for weak-ordered memory model archs,
1968 * such as IA-64). */
1969 wmb();
1970
1971 IXGB_WRITE_REG(&adapter->hw, RDT, i);
1972 }
1973
1974 if(++i == rx_ring->count) i = 0;
1975 buffer_info = &rx_ring->buffer_info[i];
1976 }
1977
1978 rx_ring->next_to_use = i;
1979 }
1980
1981 /**
1982 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
1983 *
1984 * @param netdev network interface device structure
1985 * @param grp indicates to enable or disable tagging/stripping
1986 **/
1987 static void
1988 ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
1989 {
1990 struct ixgb_adapter *adapter = netdev->priv;
1991 uint32_t ctrl, rctl;
1992
1993 ixgb_irq_disable(adapter);
1994 adapter->vlgrp = grp;
1995
1996 if(grp) {
1997 /* enable VLAN tag insert/strip */
1998 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
1999 ctrl |= IXGB_CTRL0_VME;
2000 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2001
2002 /* enable VLAN receive filtering */
2003
2004 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2005 rctl |= IXGB_RCTL_VFE;
2006 rctl &= ~IXGB_RCTL_CFIEN;
2007 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2008 } else {
2009 /* disable VLAN tag insert/strip */
2010
2011 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2012 ctrl &= ~IXGB_CTRL0_VME;
2013 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2014
2015 /* disable VLAN filtering */
2016
2017 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2018 rctl &= ~IXGB_RCTL_VFE;
2019 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2020 }
2021
2022 ixgb_irq_enable(adapter);
2023 }
2024
2025 static void
2026 ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
2027 {
2028 struct ixgb_adapter *adapter = netdev->priv;
2029 uint32_t vfta, index;
2030
2031 /* add VID to filter table */
2032
2033 index = (vid >> 5) & 0x7F;
2034 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2035 vfta |= (1 << (vid & 0x1F));
2036 ixgb_write_vfta(&adapter->hw, index, vfta);
2037 }
2038
2039 static void
2040 ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
2041 {
2042 struct ixgb_adapter *adapter = netdev->priv;
2043 uint32_t vfta, index;
2044
2045 ixgb_irq_disable(adapter);
2046
2047 if(adapter->vlgrp)
2048 adapter->vlgrp->vlan_devices[vid] = NULL;
2049
2050 ixgb_irq_enable(adapter);
2051
2052 /* remove VID from filter table*/
2053
2054 index = (vid >> 5) & 0x7F;
2055 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2056 vfta &= ~(1 << (vid & 0x1F));
2057 ixgb_write_vfta(&adapter->hw, index, vfta);
2058 }
2059
2060 static void
2061 ixgb_restore_vlan(struct ixgb_adapter *adapter)
2062 {
2063 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2064
2065 if(adapter->vlgrp) {
2066 uint16_t vid;
2067 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2068 if(!adapter->vlgrp->vlan_devices[vid])
2069 continue;
2070 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2071 }
2072 }
2073 }
2074
2075 /**
2076 * ixgb_notify_reboot - handles OS notification of reboot event.
2077 * @param nb notifier block, unused
2078 * @param event Event being passed to driver to act upon
2079 * @param p A pointer to our net device
2080 **/
2081 static int
2082 ixgb_notify_reboot(struct notifier_block *nb, unsigned long event, void *p)
2083 {
2084 struct pci_dev *pdev = NULL;
2085
2086 switch(event) {
2087 case SYS_DOWN:
2088 case SYS_HALT:
2089 case SYS_POWER_OFF:
2090 while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev))) {
2091 if (pci_dev_driver(pdev) == &ixgb_driver)
2092 ixgb_suspend(pdev, 3);
2093 }
2094 }
2095 return NOTIFY_DONE;
2096 }
2097
2098 /**
2099 * ixgb_suspend - driver suspend function called from notify.
2100 * @param pdev pci driver structure used for passing to
2101 * @param state power state to enter
2102 **/
2103 static int
2104 ixgb_suspend(struct pci_dev *pdev, uint32_t state)
2105 {
2106 struct net_device *netdev = pci_get_drvdata(pdev);
2107 struct ixgb_adapter *adapter = netdev->priv;
2108
2109 netif_device_detach(netdev);
2110
2111 if(netif_running(netdev))
2112 ixgb_down(adapter, TRUE);
2113
2114 pci_save_state(pdev);
2115
2116 state = (state > 0) ? 3 : 0;
2117 pci_set_power_state(pdev, state);
2118 msec_delay(200);
2119
2120 return 0;
2121 }
2122
2123 #ifdef CONFIG_NET_POLL_CONTROLLER
2124 /*
2125 * Polling 'interrupt' - used by things like netconsole to send skbs
2126 * without having to re-enable interrupts. It's not called while
2127 * the interrupt routine is executing.
2128 */
2129
2130 static void ixgb_netpoll(struct net_device *dev)
2131 {
2132 struct ixgb_adapter *adapter = dev->priv;
2133 disable_irq(adapter->pdev->irq);
2134 ixgb_intr(adapter->pdev->irq, dev, NULL);
2135 enable_irq(adapter->pdev->irq);
2136 }
2137 #endif
2138
2139 /* ixgb_main.c */
2140
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