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ixgb: ROUND_UP macro cleanup in drivers/net/ixgb
[linux-2.6/cjktty.git] / drivers / net / ixgb / ixgb_main.c
blob6d2b059371f10bcf46fe20d6b343a4d4ee193ec3
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;
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 #ifdef CONFIG_PCI_MSI
250 {
251 boolean_t pcix = (IXGB_READ_REG(&adapter->hw, STATUS) &
252 IXGB_STATUS_PCIX_MODE) ? TRUE : FALSE;
253 adapter->have_msi = TRUE;
254
255 if (!pcix)
256 adapter->have_msi = FALSE;
257 else if((err = pci_enable_msi(adapter->pdev))) {
258 DPRINTK(PROBE, ERR,
259 "Unable to allocate MSI interrupt Error: %d\n", err);
260 adapter->have_msi = FALSE;
261 /* proceed to try to request regular interrupt */
262 }
263 }
264
265 #endif
266 if((err = request_irq(adapter->pdev->irq, &ixgb_intr,
267 IRQF_SHARED | IRQF_SAMPLE_RANDOM,
268 netdev->name, netdev))) {
269 DPRINTK(PROBE, ERR,
270 "Unable to allocate interrupt Error: %d\n", err);
271 return err;
272 }
273
274 if((hw->max_frame_size != max_frame) ||
275 (hw->max_frame_size !=
276 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
277
278 hw->max_frame_size = max_frame;
279
280 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
281
282 if(hw->max_frame_size >
283 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
284 uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0);
285
286 if(!(ctrl0 & IXGB_CTRL0_JFE)) {
287 ctrl0 |= IXGB_CTRL0_JFE;
288 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
289 }
290 }
291 }
292
293 mod_timer(&adapter->watchdog_timer, jiffies);
294
295 #ifdef CONFIG_IXGB_NAPI
296 netif_poll_enable(netdev);
297 #endif
298 ixgb_irq_enable(adapter);
299
300 return 0;
301 }
302
303 void
304 ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog)
305 {
306 struct net_device *netdev = adapter->netdev;
307
308 ixgb_irq_disable(adapter);
309 free_irq(adapter->pdev->irq, netdev);
310 #ifdef CONFIG_PCI_MSI
311 if(adapter->have_msi == TRUE)
312 pci_disable_msi(adapter->pdev);
313
314 #endif
315 if(kill_watchdog)
316 del_timer_sync(&adapter->watchdog_timer);
317 #ifdef CONFIG_IXGB_NAPI
318 netif_poll_disable(netdev);
319 #endif
320 adapter->link_speed = 0;
321 adapter->link_duplex = 0;
322 netif_carrier_off(netdev);
323 netif_stop_queue(netdev);
324
325 ixgb_reset(adapter);
326 ixgb_clean_tx_ring(adapter);
327 ixgb_clean_rx_ring(adapter);
328 }
329
330 void
331 ixgb_reset(struct ixgb_adapter *adapter)
332 {
333
334 ixgb_adapter_stop(&adapter->hw);
335 if(!ixgb_init_hw(&adapter->hw))
336 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
337 }
338
339 /**
340 * ixgb_probe - Device Initialization Routine
341 * @pdev: PCI device information struct
342 * @ent: entry in ixgb_pci_tbl
343 *
344 * Returns 0 on success, negative on failure
345 *
346 * ixgb_probe initializes an adapter identified by a pci_dev structure.
347 * The OS initialization, configuring of the adapter private structure,
348 * and a hardware reset occur.
349 **/
350
351 static int __devinit
352 ixgb_probe(struct pci_dev *pdev,
353 const struct pci_device_id *ent)
354 {
355 struct net_device *netdev = NULL;
356 struct ixgb_adapter *adapter;
357 static int cards_found = 0;
358 unsigned long mmio_start;
359 int mmio_len;
360 int pci_using_dac;
361 int i;
362 int err;
363
364 if((err = pci_enable_device(pdev)))
365 return err;
366
367 if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
368 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
369 pci_using_dac = 1;
370 } else {
371 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
372 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
373 printk(KERN_ERR
374 "ixgb: No usable DMA configuration, aborting\n");
375 goto err_dma_mask;
376 }
377 pci_using_dac = 0;
378 }
379
380 if((err = pci_request_regions(pdev, ixgb_driver_name)))
381 goto err_request_regions;
382
383 pci_set_master(pdev);
384
385 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
386 if(!netdev) {
387 err = -ENOMEM;
388 goto err_alloc_etherdev;
389 }
390
391 SET_MODULE_OWNER(netdev);
392 SET_NETDEV_DEV(netdev, &pdev->dev);
393
394 pci_set_drvdata(pdev, netdev);
395 adapter = netdev_priv(netdev);
396 adapter->netdev = netdev;
397 adapter->pdev = pdev;
398 adapter->hw.back = adapter;
399 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
400
401 mmio_start = pci_resource_start(pdev, BAR_0);
402 mmio_len = pci_resource_len(pdev, BAR_0);
403
404 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
405 if(!adapter->hw.hw_addr) {
406 err = -EIO;
407 goto err_ioremap;
408 }
409
410 for(i = BAR_1; i <= BAR_5; i++) {
411 if(pci_resource_len(pdev, i) == 0)
412 continue;
413 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
414 adapter->hw.io_base = pci_resource_start(pdev, i);
415 break;
416 }
417 }
418
419 netdev->open = &ixgb_open;
420 netdev->stop = &ixgb_close;
421 netdev->hard_start_xmit = &ixgb_xmit_frame;
422 netdev->get_stats = &ixgb_get_stats;
423 netdev->set_multicast_list = &ixgb_set_multi;
424 netdev->set_mac_address = &ixgb_set_mac;
425 netdev->change_mtu = &ixgb_change_mtu;
426 ixgb_set_ethtool_ops(netdev);
427 netdev->tx_timeout = &ixgb_tx_timeout;
428 netdev->watchdog_timeo = 5 * HZ;
429 #ifdef CONFIG_IXGB_NAPI
430 netdev->poll = &ixgb_clean;
431 netdev->weight = 64;
432 #endif
433 netdev->vlan_rx_register = ixgb_vlan_rx_register;
434 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
435 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
436 #ifdef CONFIG_NET_POLL_CONTROLLER
437 netdev->poll_controller = ixgb_netpoll;
438 #endif
439
440 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
441 netdev->mem_start = mmio_start;
442 netdev->mem_end = mmio_start + mmio_len;
443 netdev->base_addr = adapter->hw.io_base;
444
445 adapter->bd_number = cards_found;
446 adapter->link_speed = 0;
447 adapter->link_duplex = 0;
448
449 /* setup the private structure */
450
451 if((err = ixgb_sw_init(adapter)))
452 goto err_sw_init;
453
454 netdev->features = NETIF_F_SG |
455 NETIF_F_HW_CSUM |
456 NETIF_F_HW_VLAN_TX |
457 NETIF_F_HW_VLAN_RX |
458 NETIF_F_HW_VLAN_FILTER;
459 netdev->features |= NETIF_F_TSO;
460 #ifdef NETIF_F_LLTX
461 netdev->features |= NETIF_F_LLTX;
462 #endif
463
464 if(pci_using_dac)
465 netdev->features |= NETIF_F_HIGHDMA;
466
467 /* make sure the EEPROM is good */
468
469 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
470 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
471 err = -EIO;
472 goto err_eeprom;
473 }
474
475 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
476 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
477
478 if(!is_valid_ether_addr(netdev->perm_addr)) {
479 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
480 err = -EIO;
481 goto err_eeprom;
482 }
483
484 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
485
486 init_timer(&adapter->watchdog_timer);
487 adapter->watchdog_timer.function = &ixgb_watchdog;
488 adapter->watchdog_timer.data = (unsigned long)adapter;
489
490 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
491
492 strcpy(netdev->name, "eth%d");
493 if((err = register_netdev(netdev)))
494 goto err_register;
495
496 /* we're going to reset, so assume we have no link for now */
497
498 netif_carrier_off(netdev);
499 netif_stop_queue(netdev);
500
501 DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
502 ixgb_check_options(adapter);
503 /* reset the hardware with the new settings */
504
505 ixgb_reset(adapter);
506
507 cards_found++;
508 return 0;
509
510 err_register:
511 err_sw_init:
512 err_eeprom:
513 iounmap(adapter->hw.hw_addr);
514 err_ioremap:
515 free_netdev(netdev);
516 err_alloc_etherdev:
517 pci_release_regions(pdev);
518 err_request_regions:
519 err_dma_mask:
520 pci_disable_device(pdev);
521 return err;
522 }
523
524 /**
525 * ixgb_remove - Device Removal Routine
526 * @pdev: PCI device information struct
527 *
528 * ixgb_remove is called by the PCI subsystem to alert the driver
529 * that it should release a PCI device. The could be caused by a
530 * Hot-Plug event, or because the driver is going to be removed from
531 * memory.
532 **/
533
534 static void __devexit
535 ixgb_remove(struct pci_dev *pdev)
536 {
537 struct net_device *netdev = pci_get_drvdata(pdev);
538 struct ixgb_adapter *adapter = netdev_priv(netdev);
539
540 unregister_netdev(netdev);
541
542 iounmap(adapter->hw.hw_addr);
543 pci_release_regions(pdev);
544
545 free_netdev(netdev);
546 }
547
548 /**
549 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
550 * @adapter: board private structure to initialize
551 *
552 * ixgb_sw_init initializes the Adapter private data structure.
553 * Fields are initialized based on PCI device information and
554 * OS network device settings (MTU size).
555 **/
556
557 static int __devinit
558 ixgb_sw_init(struct ixgb_adapter *adapter)
559 {
560 struct ixgb_hw *hw = &adapter->hw;
561 struct net_device *netdev = adapter->netdev;
562 struct pci_dev *pdev = adapter->pdev;
563
564 /* PCI config space info */
565
566 hw->vendor_id = pdev->vendor;
567 hw->device_id = pdev->device;
568 hw->subsystem_vendor_id = pdev->subsystem_vendor;
569 hw->subsystem_id = pdev->subsystem_device;
570
571 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
572 adapter->rx_buffer_len = hw->max_frame_size;
573
574 if((hw->device_id == IXGB_DEVICE_ID_82597EX)
575 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
576 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
577 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
578 hw->mac_type = ixgb_82597;
579 else {
580 /* should never have loaded on this device */
581 DPRINTK(PROBE, ERR, "unsupported device id\n");
582 }
583
584 /* enable flow control to be programmed */
585 hw->fc.send_xon = 1;
586
587 atomic_set(&adapter->irq_sem, 1);
588 spin_lock_init(&adapter->tx_lock);
589
590 return 0;
591 }
592
593 /**
594 * ixgb_open - Called when a network interface is made active
595 * @netdev: network interface device structure
596 *
597 * Returns 0 on success, negative value on failure
598 *
599 * The open entry point is called when a network interface is made
600 * active by the system (IFF_UP). At this point all resources needed
601 * for transmit and receive operations are allocated, the interrupt
602 * handler is registered with the OS, the watchdog timer is started,
603 * and the stack is notified that the interface is ready.
604 **/
605
606 static int
607 ixgb_open(struct net_device *netdev)
608 {
609 struct ixgb_adapter *adapter = netdev_priv(netdev);
610 int err;
611
612 /* allocate transmit descriptors */
613
614 if((err = ixgb_setup_tx_resources(adapter)))
615 goto err_setup_tx;
616
617 /* allocate receive descriptors */
618
619 if((err = ixgb_setup_rx_resources(adapter)))
620 goto err_setup_rx;
621
622 if((err = ixgb_up(adapter)))
623 goto err_up;
624
625 return 0;
626
627 err_up:
628 ixgb_free_rx_resources(adapter);
629 err_setup_rx:
630 ixgb_free_tx_resources(adapter);
631 err_setup_tx:
632 ixgb_reset(adapter);
633
634 return err;
635 }
636
637 /**
638 * ixgb_close - Disables a network interface
639 * @netdev: network interface device structure
640 *
641 * Returns 0, this is not allowed to fail
642 *
643 * The close entry point is called when an interface is de-activated
644 * by the OS. The hardware is still under the drivers control, but
645 * needs to be disabled. A global MAC reset is issued to stop the
646 * hardware, and all transmit and receive resources are freed.
647 **/
648
649 static int
650 ixgb_close(struct net_device *netdev)
651 {
652 struct ixgb_adapter *adapter = netdev_priv(netdev);
653
654 ixgb_down(adapter, TRUE);
655
656 ixgb_free_tx_resources(adapter);
657 ixgb_free_rx_resources(adapter);
658
659 return 0;
660 }
661
662 /**
663 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
664 * @adapter: board private structure
665 *
666 * Return 0 on success, negative on failure
667 **/
668
669 int
670 ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
671 {
672 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
673 struct pci_dev *pdev = adapter->pdev;
674 int size;
675
676 size = sizeof(struct ixgb_buffer) * txdr->count;
677 txdr->buffer_info = vmalloc(size);
678 if(!txdr->buffer_info) {
679 DPRINTK(PROBE, ERR,
680 "Unable to allocate transmit descriptor ring memory\n");
681 return -ENOMEM;
682 }
683 memset(txdr->buffer_info, 0, size);
684
685 /* round up to nearest 4K */
686
687 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
688 txdr->size = ALIGN(txdr->size, 4096);
689
690 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
691 if(!txdr->desc) {
692 vfree(txdr->buffer_info);
693 DPRINTK(PROBE, ERR,
694 "Unable to allocate transmit descriptor memory\n");
695 return -ENOMEM;
696 }
697 memset(txdr->desc, 0, txdr->size);
698
699 txdr->next_to_use = 0;
700 txdr->next_to_clean = 0;
701
702 return 0;
703 }
704
705 /**
706 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
707 * @adapter: board private structure
708 *
709 * Configure the Tx unit of the MAC after a reset.
710 **/
711
712 static void
713 ixgb_configure_tx(struct ixgb_adapter *adapter)
714 {
715 uint64_t tdba = adapter->tx_ring.dma;
716 uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
717 uint32_t tctl;
718 struct ixgb_hw *hw = &adapter->hw;
719
720 /* Setup the Base and Length of the Tx Descriptor Ring
721 * tx_ring.dma can be either a 32 or 64 bit value
722 */
723
724 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
725 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
726
727 IXGB_WRITE_REG(hw, TDLEN, tdlen);
728
729 /* Setup the HW Tx Head and Tail descriptor pointers */
730
731 IXGB_WRITE_REG(hw, TDH, 0);
732 IXGB_WRITE_REG(hw, TDT, 0);
733
734 /* don't set up txdctl, it induces performance problems if configured
735 * incorrectly */
736 /* Set the Tx Interrupt Delay register */
737
738 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
739
740 /* Program the Transmit Control Register */
741
742 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
743 IXGB_WRITE_REG(hw, TCTL, tctl);
744
745 /* Setup Transmit Descriptor Settings for this adapter */
746 adapter->tx_cmd_type =
747 IXGB_TX_DESC_TYPE
748 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
749 }
750
751 /**
752 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
753 * @adapter: board private structure
754 *
755 * Returns 0 on success, negative on failure
756 **/
757
758 int
759 ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
760 {
761 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
762 struct pci_dev *pdev = adapter->pdev;
763 int size;
764
765 size = sizeof(struct ixgb_buffer) * rxdr->count;
766 rxdr->buffer_info = vmalloc(size);
767 if(!rxdr->buffer_info) {
768 DPRINTK(PROBE, ERR,
769 "Unable to allocate receive descriptor ring\n");
770 return -ENOMEM;
771 }
772 memset(rxdr->buffer_info, 0, size);
773
774 /* Round up to nearest 4K */
775
776 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
777 rxdr->size = ALIGN(rxdr->size, 4096);
778
779 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
780
781 if(!rxdr->desc) {
782 vfree(rxdr->buffer_info);
783 DPRINTK(PROBE, ERR,
784 "Unable to allocate receive descriptors\n");
785 return -ENOMEM;
786 }
787 memset(rxdr->desc, 0, rxdr->size);
788
789 rxdr->next_to_clean = 0;
790 rxdr->next_to_use = 0;
791
792 return 0;
793 }
794
795 /**
796 * ixgb_setup_rctl - configure the receive control register
797 * @adapter: Board private structure
798 **/
799
800 static void
801 ixgb_setup_rctl(struct ixgb_adapter *adapter)
802 {
803 uint32_t rctl;
804
805 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
806
807 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
808
809 rctl |=
810 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
811 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
812 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
813
814 rctl |= IXGB_RCTL_SECRC;
815
816 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
817 rctl |= IXGB_RCTL_BSIZE_2048;
818 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
819 rctl |= IXGB_RCTL_BSIZE_4096;
820 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
821 rctl |= IXGB_RCTL_BSIZE_8192;
822 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
823 rctl |= IXGB_RCTL_BSIZE_16384;
824
825 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
826 }
827
828 /**
829 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
830 * @adapter: board private structure
831 *
832 * Configure the Rx unit of the MAC after a reset.
833 **/
834
835 static void
836 ixgb_configure_rx(struct ixgb_adapter *adapter)
837 {
838 uint64_t rdba = adapter->rx_ring.dma;
839 uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
840 struct ixgb_hw *hw = &adapter->hw;
841 uint32_t rctl;
842 uint32_t rxcsum;
843 uint32_t rxdctl;
844
845 /* make sure receives are disabled while setting up the descriptors */
846
847 rctl = IXGB_READ_REG(hw, RCTL);
848 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
849
850 /* set the Receive Delay Timer Register */
851
852 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
853
854 /* Setup the Base and Length of the Rx Descriptor Ring */
855
856 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
857 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
858
859 IXGB_WRITE_REG(hw, RDLEN, rdlen);
860
861 /* Setup the HW Rx Head and Tail Descriptor Pointers */
862 IXGB_WRITE_REG(hw, RDH, 0);
863 IXGB_WRITE_REG(hw, RDT, 0);
864
865 /* set up pre-fetching of receive buffers so we get some before we
866 * run out (default hardware behavior is to run out before fetching
867 * more). This sets up to fetch if HTHRESH rx descriptors are avail
868 * and the descriptors in hw cache are below PTHRESH. This avoids
869 * the hardware behavior of fetching <=512 descriptors in a single
870 * burst that pre-empts all other activity, usually causing fifo
871 * overflows. */
872 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
873 rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT |
874 RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT |
875 RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
876 IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
877
878 /* Enable Receive Checksum Offload for TCP and UDP */
879 if(adapter->rx_csum == TRUE) {
880 rxcsum = IXGB_READ_REG(hw, RXCSUM);
881 rxcsum |= IXGB_RXCSUM_TUOFL;
882 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
883 }
884
885 /* Enable Receives */
886
887 IXGB_WRITE_REG(hw, RCTL, rctl);
888 }
889
890 /**
891 * ixgb_free_tx_resources - Free Tx Resources
892 * @adapter: board private structure
893 *
894 * Free all transmit software resources
895 **/
896
897 void
898 ixgb_free_tx_resources(struct ixgb_adapter *adapter)
899 {
900 struct pci_dev *pdev = adapter->pdev;
901
902 ixgb_clean_tx_ring(adapter);
903
904 vfree(adapter->tx_ring.buffer_info);
905 adapter->tx_ring.buffer_info = NULL;
906
907 pci_free_consistent(pdev, adapter->tx_ring.size,
908 adapter->tx_ring.desc, adapter->tx_ring.dma);
909
910 adapter->tx_ring.desc = NULL;
911 }
912
913 static void
914 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
915 struct ixgb_buffer *buffer_info)
916 {
917 struct pci_dev *pdev = adapter->pdev;
918
919 if (buffer_info->dma)
920 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
921 PCI_DMA_TODEVICE);
922
923 if (buffer_info->skb)
924 dev_kfree_skb_any(buffer_info->skb);
925
926 buffer_info->skb = NULL;
927 buffer_info->dma = 0;
928 buffer_info->time_stamp = 0;
929 /* these fields must always be initialized in tx
930 * buffer_info->length = 0;
931 * buffer_info->next_to_watch = 0; */
932 }
933
934 /**
935 * ixgb_clean_tx_ring - Free Tx Buffers
936 * @adapter: board private structure
937 **/
938
939 static void
940 ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
941 {
942 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
943 struct ixgb_buffer *buffer_info;
944 unsigned long size;
945 unsigned int i;
946
947 /* Free all the Tx ring sk_buffs */
948
949 for(i = 0; i < tx_ring->count; i++) {
950 buffer_info = &tx_ring->buffer_info[i];
951 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
952 }
953
954 size = sizeof(struct ixgb_buffer) * tx_ring->count;
955 memset(tx_ring->buffer_info, 0, size);
956
957 /* Zero out the descriptor ring */
958
959 memset(tx_ring->desc, 0, tx_ring->size);
960
961 tx_ring->next_to_use = 0;
962 tx_ring->next_to_clean = 0;
963
964 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
965 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
966 }
967
968 /**
969 * ixgb_free_rx_resources - Free Rx Resources
970 * @adapter: board private structure
971 *
972 * Free all receive software resources
973 **/
974
975 void
976 ixgb_free_rx_resources(struct ixgb_adapter *adapter)
977 {
978 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
979 struct pci_dev *pdev = adapter->pdev;
980
981 ixgb_clean_rx_ring(adapter);
982
983 vfree(rx_ring->buffer_info);
984 rx_ring->buffer_info = NULL;
985
986 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
987
988 rx_ring->desc = NULL;
989 }
990
991 /**
992 * ixgb_clean_rx_ring - Free Rx Buffers
993 * @adapter: board private structure
994 **/
995
996 static void
997 ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
998 {
999 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1000 struct ixgb_buffer *buffer_info;
1001 struct pci_dev *pdev = adapter->pdev;
1002 unsigned long size;
1003 unsigned int i;
1004
1005 /* Free all the Rx ring sk_buffs */
1006
1007 for(i = 0; i < rx_ring->count; i++) {
1008 buffer_info = &rx_ring->buffer_info[i];
1009 if(buffer_info->skb) {
1010
1011 pci_unmap_single(pdev,
1012 buffer_info->dma,
1013 buffer_info->length,
1014 PCI_DMA_FROMDEVICE);
1015
1016 dev_kfree_skb(buffer_info->skb);
1017
1018 buffer_info->skb = NULL;
1019 }
1020 }
1021
1022 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1023 memset(rx_ring->buffer_info, 0, size);
1024
1025 /* Zero out the descriptor ring */
1026
1027 memset(rx_ring->desc, 0, rx_ring->size);
1028
1029 rx_ring->next_to_clean = 0;
1030 rx_ring->next_to_use = 0;
1031
1032 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1033 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1034 }
1035
1036 /**
1037 * ixgb_set_mac - Change the Ethernet Address of the NIC
1038 * @netdev: network interface device structure
1039 * @p: pointer to an address structure
1040 *
1041 * Returns 0 on success, negative on failure
1042 **/
1043
1044 static int
1045 ixgb_set_mac(struct net_device *netdev, void *p)
1046 {
1047 struct ixgb_adapter *adapter = netdev_priv(netdev);
1048 struct sockaddr *addr = p;
1049
1050 if(!is_valid_ether_addr(addr->sa_data))
1051 return -EADDRNOTAVAIL;
1052
1053 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1054
1055 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1056
1057 return 0;
1058 }
1059
1060 /**
1061 * ixgb_set_multi - Multicast and Promiscuous mode set
1062 * @netdev: network interface device structure
1063 *
1064 * The set_multi entry point is called whenever the multicast address
1065 * list or the network interface flags are updated. This routine is
1066 * responsible for configuring the hardware for proper multicast,
1067 * promiscuous mode, and all-multi behavior.
1068 **/
1069
1070 static void
1071 ixgb_set_multi(struct net_device *netdev)
1072 {
1073 struct ixgb_adapter *adapter = netdev_priv(netdev);
1074 struct ixgb_hw *hw = &adapter->hw;
1075 struct dev_mc_list *mc_ptr;
1076 uint32_t rctl;
1077 int i;
1078
1079 /* Check for Promiscuous and All Multicast modes */
1080
1081 rctl = IXGB_READ_REG(hw, RCTL);
1082
1083 if(netdev->flags & IFF_PROMISC) {
1084 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1085 } else if(netdev->flags & IFF_ALLMULTI) {
1086 rctl |= IXGB_RCTL_MPE;
1087 rctl &= ~IXGB_RCTL_UPE;
1088 } else {
1089 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1090 }
1091
1092 if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1093 rctl |= IXGB_RCTL_MPE;
1094 IXGB_WRITE_REG(hw, RCTL, rctl);
1095 } else {
1096 uint8_t mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS];
1097
1098 IXGB_WRITE_REG(hw, RCTL, rctl);
1099
1100 for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
1101 i++, mc_ptr = mc_ptr->next)
1102 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
1103 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1104
1105 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1106 }
1107 }
1108
1109 /**
1110 * ixgb_watchdog - Timer Call-back
1111 * @data: pointer to netdev cast into an unsigned long
1112 **/
1113
1114 static void
1115 ixgb_watchdog(unsigned long data)
1116 {
1117 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1118 struct net_device *netdev = adapter->netdev;
1119 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1120
1121 ixgb_check_for_link(&adapter->hw);
1122
1123 if (ixgb_check_for_bad_link(&adapter->hw)) {
1124 /* force the reset path */
1125 netif_stop_queue(netdev);
1126 }
1127
1128 if(adapter->hw.link_up) {
1129 if(!netif_carrier_ok(netdev)) {
1130 DPRINTK(LINK, INFO,
1131 "NIC Link is Up 10000 Mbps Full Duplex\n");
1132 adapter->link_speed = 10000;
1133 adapter->link_duplex = FULL_DUPLEX;
1134 netif_carrier_on(netdev);
1135 netif_wake_queue(netdev);
1136 }
1137 } else {
1138 if(netif_carrier_ok(netdev)) {
1139 adapter->link_speed = 0;
1140 adapter->link_duplex = 0;
1141 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1142 netif_carrier_off(netdev);
1143 netif_stop_queue(netdev);
1144
1145 }
1146 }
1147
1148 ixgb_update_stats(adapter);
1149
1150 if(!netif_carrier_ok(netdev)) {
1151 if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1152 /* We've lost link, so the controller stops DMA,
1153 * but we've got queued Tx work that's never going
1154 * to get done, so reset controller to flush Tx.
1155 * (Do the reset outside of interrupt context). */
1156 schedule_work(&adapter->tx_timeout_task);
1157 }
1158 }
1159
1160 /* Force detection of hung controller every watchdog period */
1161 adapter->detect_tx_hung = TRUE;
1162
1163 /* generate an interrupt to force clean up of any stragglers */
1164 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1165
1166 /* Reset the timer */
1167 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1168 }
1169
1170 #define IXGB_TX_FLAGS_CSUM 0x00000001
1171 #define IXGB_TX_FLAGS_VLAN 0x00000002
1172 #define IXGB_TX_FLAGS_TSO 0x00000004
1173
1174 static int
1175 ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1176 {
1177 struct ixgb_context_desc *context_desc;
1178 unsigned int i;
1179 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1180 uint16_t ipcse, tucse, mss;
1181 int err;
1182
1183 if (likely(skb_is_gso(skb))) {
1184 struct ixgb_buffer *buffer_info;
1185 struct iphdr *iph;
1186
1187 if (skb_header_cloned(skb)) {
1188 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1189 if (err)
1190 return err;
1191 }
1192
1193 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1194 mss = skb_shinfo(skb)->gso_size;
1195 iph = ip_hdr(skb);
1196 iph->tot_len = 0;
1197 iph->check = 0;
1198 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1199 iph->daddr, 0,
1200 IPPROTO_TCP, 0);
1201 ipcss = skb_network_offset(skb);
1202 ipcso = (void *)&(iph->check) - (void *)skb->data;
1203 ipcse = skb_transport_offset(skb) - 1;
1204 tucss = skb_transport_offset(skb);
1205 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1206 tucse = 0;
1207
1208 i = adapter->tx_ring.next_to_use;
1209 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1210 buffer_info = &adapter->tx_ring.buffer_info[i];
1211 WARN_ON(buffer_info->dma != 0);
1212
1213 context_desc->ipcss = ipcss;
1214 context_desc->ipcso = ipcso;
1215 context_desc->ipcse = cpu_to_le16(ipcse);
1216 context_desc->tucss = tucss;
1217 context_desc->tucso = tucso;
1218 context_desc->tucse = cpu_to_le16(tucse);
1219 context_desc->mss = cpu_to_le16(mss);
1220 context_desc->hdr_len = hdr_len;
1221 context_desc->status = 0;
1222 context_desc->cmd_type_len = cpu_to_le32(
1223 IXGB_CONTEXT_DESC_TYPE
1224 | IXGB_CONTEXT_DESC_CMD_TSE
1225 | IXGB_CONTEXT_DESC_CMD_IP
1226 | IXGB_CONTEXT_DESC_CMD_TCP
1227 | IXGB_CONTEXT_DESC_CMD_IDE
1228 | (skb->len - (hdr_len)));
1229
1230
1231 if(++i == adapter->tx_ring.count) i = 0;
1232 adapter->tx_ring.next_to_use = i;
1233
1234 return 1;
1235 }
1236
1237 return 0;
1238 }
1239
1240 static boolean_t
1241 ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1242 {
1243 struct ixgb_context_desc *context_desc;
1244 unsigned int i;
1245 uint8_t css, cso;
1246
1247 if(likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1248 struct ixgb_buffer *buffer_info;
1249 css = skb_transport_offset(skb);
1250 cso = css + skb->csum_offset;
1251
1252 i = adapter->tx_ring.next_to_use;
1253 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1254 buffer_info = &adapter->tx_ring.buffer_info[i];
1255 WARN_ON(buffer_info->dma != 0);
1256
1257 context_desc->tucss = css;
1258 context_desc->tucso = cso;
1259 context_desc->tucse = 0;
1260 /* zero out any previously existing data in one instruction */
1261 *(uint32_t *)&(context_desc->ipcss) = 0;
1262 context_desc->status = 0;
1263 context_desc->hdr_len = 0;
1264 context_desc->mss = 0;
1265 context_desc->cmd_type_len =
1266 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1267 | IXGB_TX_DESC_CMD_IDE);
1268
1269 if(++i == adapter->tx_ring.count) i = 0;
1270 adapter->tx_ring.next_to_use = i;
1271
1272 return TRUE;
1273 }
1274
1275 return FALSE;
1276 }
1277
1278 #define IXGB_MAX_TXD_PWR 14
1279 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1280
1281 static int
1282 ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1283 unsigned int first)
1284 {
1285 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1286 struct ixgb_buffer *buffer_info;
1287 int len = skb->len;
1288 unsigned int offset = 0, size, count = 0, i;
1289 unsigned int mss = skb_shinfo(skb)->gso_size;
1290
1291 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1292 unsigned int f;
1293
1294 len -= skb->data_len;
1295
1296 i = tx_ring->next_to_use;
1297
1298 while(len) {
1299 buffer_info = &tx_ring->buffer_info[i];
1300 size = min(len, IXGB_MAX_DATA_PER_TXD);
1301 /* Workaround for premature desc write-backs
1302 * in TSO mode. Append 4-byte sentinel desc */
1303 if (unlikely(mss && !nr_frags && size == len && size > 8))
1304 size -= 4;
1305
1306 buffer_info->length = size;
1307 WARN_ON(buffer_info->dma != 0);
1308 buffer_info->dma =
1309 pci_map_single(adapter->pdev,
1310 skb->data + offset,
1311 size,
1312 PCI_DMA_TODEVICE);
1313 buffer_info->time_stamp = jiffies;
1314 buffer_info->next_to_watch = 0;
1315
1316 len -= size;
1317 offset += size;
1318 count++;
1319 if(++i == tx_ring->count) i = 0;
1320 }
1321
1322 for(f = 0; f < nr_frags; f++) {
1323 struct skb_frag_struct *frag;
1324
1325 frag = &skb_shinfo(skb)->frags[f];
1326 len = frag->size;
1327 offset = 0;
1328
1329 while(len) {
1330 buffer_info = &tx_ring->buffer_info[i];
1331 size = min(len, IXGB_MAX_DATA_PER_TXD);
1332
1333 /* Workaround for premature desc write-backs
1334 * in TSO mode. Append 4-byte sentinel desc */
1335 if (unlikely(mss && !nr_frags && size == len
1336 && size > 8))
1337 size -= 4;
1338
1339 buffer_info->length = size;
1340 buffer_info->dma =
1341 pci_map_page(adapter->pdev,
1342 frag->page,
1343 frag->page_offset + offset,
1344 size,
1345 PCI_DMA_TODEVICE);
1346 buffer_info->time_stamp = jiffies;
1347 buffer_info->next_to_watch = 0;
1348
1349 len -= size;
1350 offset += size;
1351 count++;
1352 if(++i == tx_ring->count) i = 0;
1353 }
1354 }
1355 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1356 tx_ring->buffer_info[i].skb = skb;
1357 tx_ring->buffer_info[first].next_to_watch = i;
1358
1359 return count;
1360 }
1361
1362 static void
1363 ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1364 {
1365 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1366 struct ixgb_tx_desc *tx_desc = NULL;
1367 struct ixgb_buffer *buffer_info;
1368 uint32_t cmd_type_len = adapter->tx_cmd_type;
1369 uint8_t status = 0;
1370 uint8_t popts = 0;
1371 unsigned int i;
1372
1373 if(tx_flags & IXGB_TX_FLAGS_TSO) {
1374 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1375 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1376 }
1377
1378 if(tx_flags & IXGB_TX_FLAGS_CSUM)
1379 popts |= IXGB_TX_DESC_POPTS_TXSM;
1380
1381 if(tx_flags & IXGB_TX_FLAGS_VLAN) {
1382 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1383 }
1384
1385 i = tx_ring->next_to_use;
1386
1387 while(count--) {
1388 buffer_info = &tx_ring->buffer_info[i];
1389 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1390 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1391 tx_desc->cmd_type_len =
1392 cpu_to_le32(cmd_type_len | buffer_info->length);
1393 tx_desc->status = status;
1394 tx_desc->popts = popts;
1395 tx_desc->vlan = cpu_to_le16(vlan_id);
1396
1397 if(++i == tx_ring->count) i = 0;
1398 }
1399
1400 tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1401 | IXGB_TX_DESC_CMD_RS );
1402
1403 /* Force memory writes to complete before letting h/w
1404 * know there are new descriptors to fetch. (Only
1405 * applicable for weak-ordered memory model archs,
1406 * such as IA-64). */
1407 wmb();
1408
1409 tx_ring->next_to_use = i;
1410 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1411 }
1412
1413 static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1414 {
1415 struct ixgb_adapter *adapter = netdev_priv(netdev);
1416 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1417
1418 netif_stop_queue(netdev);
1419 /* Herbert's original patch had:
1420 * smp_mb__after_netif_stop_queue();
1421 * but since that doesn't exist yet, just open code it. */
1422 smp_mb();
1423
1424 /* We need to check again in a case another CPU has just
1425 * made room available. */
1426 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1427 return -EBUSY;
1428
1429 /* A reprieve! */
1430 netif_start_queue(netdev);
1431 ++adapter->restart_queue;
1432 return 0;
1433 }
1434
1435 static int ixgb_maybe_stop_tx(struct net_device *netdev,
1436 struct ixgb_desc_ring *tx_ring, int size)
1437 {
1438 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1439 return 0;
1440 return __ixgb_maybe_stop_tx(netdev, size);
1441 }
1442
1443
1444 /* Tx Descriptors needed, worst case */
1445 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1446 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1447 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1448 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1449 + 1 /* one more needed for sentinel TSO workaround */
1450
1451 static int
1452 ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1453 {
1454 struct ixgb_adapter *adapter = netdev_priv(netdev);
1455 unsigned int first;
1456 unsigned int tx_flags = 0;
1457 unsigned long flags;
1458 int vlan_id = 0;
1459 int tso;
1460
1461 if(skb->len <= 0) {
1462 dev_kfree_skb_any(skb);
1463 return 0;
1464 }
1465
1466 #ifdef NETIF_F_LLTX
1467 local_irq_save(flags);
1468 if (!spin_trylock(&adapter->tx_lock)) {
1469 /* Collision - tell upper layer to requeue */
1470 local_irq_restore(flags);
1471 return NETDEV_TX_LOCKED;
1472 }
1473 #else
1474 spin_lock_irqsave(&adapter->tx_lock, flags);
1475 #endif
1476
1477 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
1478 DESC_NEEDED))) {
1479 netif_stop_queue(netdev);
1480 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1481 return NETDEV_TX_BUSY;
1482 }
1483
1484 #ifndef NETIF_F_LLTX
1485 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1486 #endif
1487
1488 if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
1489 tx_flags |= IXGB_TX_FLAGS_VLAN;
1490 vlan_id = vlan_tx_tag_get(skb);
1491 }
1492
1493 first = adapter->tx_ring.next_to_use;
1494
1495 tso = ixgb_tso(adapter, skb);
1496 if (tso < 0) {
1497 dev_kfree_skb_any(skb);
1498 #ifdef NETIF_F_LLTX
1499 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1500 #endif
1501 return NETDEV_TX_OK;
1502 }
1503
1504 if (likely(tso))
1505 tx_flags |= IXGB_TX_FLAGS_TSO;
1506 else if(ixgb_tx_csum(adapter, skb))
1507 tx_flags |= IXGB_TX_FLAGS_CSUM;
1508
1509 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1510 tx_flags);
1511
1512 netdev->trans_start = jiffies;
1513
1514 #ifdef NETIF_F_LLTX
1515 /* Make sure there is space in the ring for the next send. */
1516 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1517
1518 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1519
1520 #endif
1521 return NETDEV_TX_OK;
1522 }
1523
1524 /**
1525 * ixgb_tx_timeout - Respond to a Tx Hang
1526 * @netdev: network interface device structure
1527 **/
1528
1529 static void
1530 ixgb_tx_timeout(struct net_device *netdev)
1531 {
1532 struct ixgb_adapter *adapter = netdev_priv(netdev);
1533
1534 /* Do the reset outside of interrupt context */
1535 schedule_work(&adapter->tx_timeout_task);
1536 }
1537
1538 static void
1539 ixgb_tx_timeout_task(struct work_struct *work)
1540 {
1541 struct ixgb_adapter *adapter =
1542 container_of(work, struct ixgb_adapter, tx_timeout_task);
1543
1544 adapter->tx_timeout_count++;
1545 ixgb_down(adapter, TRUE);
1546 ixgb_up(adapter);
1547 }
1548
1549 /**
1550 * ixgb_get_stats - Get System Network Statistics
1551 * @netdev: network interface device structure
1552 *
1553 * Returns the address of the device statistics structure.
1554 * The statistics are actually updated from the timer callback.
1555 **/
1556
1557 static struct net_device_stats *
1558 ixgb_get_stats(struct net_device *netdev)
1559 {
1560 struct ixgb_adapter *adapter = netdev_priv(netdev);
1561
1562 return &adapter->net_stats;
1563 }
1564
1565 /**
1566 * ixgb_change_mtu - Change the Maximum Transfer Unit
1567 * @netdev: network interface device structure
1568 * @new_mtu: new value for maximum frame size
1569 *
1570 * Returns 0 on success, negative on failure
1571 **/
1572
1573 static int
1574 ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1575 {
1576 struct ixgb_adapter *adapter = netdev_priv(netdev);
1577 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1578 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1579
1580
1581 if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1582 || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
1583 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1584 return -EINVAL;
1585 }
1586
1587 adapter->rx_buffer_len = max_frame;
1588
1589 netdev->mtu = new_mtu;
1590
1591 if ((old_max_frame != max_frame) && netif_running(netdev)) {
1592 ixgb_down(adapter, TRUE);
1593 ixgb_up(adapter);
1594 }
1595
1596 return 0;
1597 }
1598
1599 /**
1600 * ixgb_update_stats - Update the board statistics counters.
1601 * @adapter: board private structure
1602 **/
1603
1604 void
1605 ixgb_update_stats(struct ixgb_adapter *adapter)
1606 {
1607 struct net_device *netdev = adapter->netdev;
1608 struct pci_dev *pdev = adapter->pdev;
1609
1610 /* Prevent stats update while adapter is being reset */
1611 if (pci_channel_offline(pdev))
1612 return;
1613
1614 if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
1615 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1616 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1617 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1618 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1619 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1620
1621 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1622 /* fix up multicast stats by removing broadcasts */
1623 if(multi >= bcast)
1624 multi -= bcast;
1625
1626 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1627 adapter->stats.mprch += (multi >> 32);
1628 adapter->stats.bprcl += bcast_l;
1629 adapter->stats.bprch += bcast_h;
1630 } else {
1631 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1632 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1633 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1634 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1635 }
1636 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1637 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1638 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1639 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1640 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1641 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1642 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1643 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1644 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1645 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1646 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1647 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1648 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1649 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1650 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1651 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1652 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1653 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1654 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1655 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1656 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1657 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1658 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1659 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1660 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1661 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1662 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1663 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1664 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1665 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1666 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1667 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1668 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1669 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1670 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1671 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1672 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1673 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1674 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1675 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1676 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1677 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1678 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1679 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1680 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1681 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1682 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1683 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1684 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1685 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1686 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1687 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1688 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1689 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1690 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1691 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1692
1693 /* Fill out the OS statistics structure */
1694
1695 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1696 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1697 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1698 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1699 adapter->net_stats.multicast = adapter->stats.mprcl;
1700 adapter->net_stats.collisions = 0;
1701
1702 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1703 * with a length in the type/len field */
1704 adapter->net_stats.rx_errors =
1705 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1706 adapter->stats.ruc +
1707 adapter->stats.roc /*+ adapter->stats.rlec */ +
1708 adapter->stats.icbc +
1709 adapter->stats.ecbc + adapter->stats.mpc;
1710
1711 /* see above
1712 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1713 */
1714
1715 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1716 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1717 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1718 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1719
1720 adapter->net_stats.tx_errors = 0;
1721 adapter->net_stats.rx_frame_errors = 0;
1722 adapter->net_stats.tx_aborted_errors = 0;
1723 adapter->net_stats.tx_carrier_errors = 0;
1724 adapter->net_stats.tx_fifo_errors = 0;
1725 adapter->net_stats.tx_heartbeat_errors = 0;
1726 adapter->net_stats.tx_window_errors = 0;
1727 }
1728
1729 #define IXGB_MAX_INTR 10
1730 /**
1731 * ixgb_intr - Interrupt Handler
1732 * @irq: interrupt number
1733 * @data: pointer to a network interface device structure
1734 **/
1735
1736 static irqreturn_t
1737 ixgb_intr(int irq, void *data)
1738 {
1739 struct net_device *netdev = data;
1740 struct ixgb_adapter *adapter = netdev_priv(netdev);
1741 struct ixgb_hw *hw = &adapter->hw;
1742 uint32_t icr = IXGB_READ_REG(hw, ICR);
1743 #ifndef CONFIG_IXGB_NAPI
1744 unsigned int i;
1745 #endif
1746
1747 if(unlikely(!icr))
1748 return IRQ_NONE; /* Not our interrupt */
1749
1750 if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) {
1751 mod_timer(&adapter->watchdog_timer, jiffies);
1752 }
1753
1754 #ifdef CONFIG_IXGB_NAPI
1755 if(netif_rx_schedule_prep(netdev)) {
1756
1757 /* Disable interrupts and register for poll. The flush
1758 of the posted write is intentionally left out.
1759 */
1760
1761 atomic_inc(&adapter->irq_sem);
1762 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
1763 __netif_rx_schedule(netdev);
1764 }
1765 #else
1766 /* yes, that is actually a & and it is meant to make sure that
1767 * every pass through this for loop checks both receive and
1768 * transmit queues for completed descriptors, intended to
1769 * avoid starvation issues and assist tx/rx fairness. */
1770 for(i = 0; i < IXGB_MAX_INTR; i++)
1771 if(!ixgb_clean_rx_irq(adapter) &
1772 !ixgb_clean_tx_irq(adapter))
1773 break;
1774 #endif
1775 return IRQ_HANDLED;
1776 }
1777
1778 #ifdef CONFIG_IXGB_NAPI
1779 /**
1780 * ixgb_clean - NAPI Rx polling callback
1781 * @adapter: board private structure
1782 **/
1783
1784 static int
1785 ixgb_clean(struct net_device *netdev, int *budget)
1786 {
1787 struct ixgb_adapter *adapter = netdev_priv(netdev);
1788 int work_to_do = min(*budget, netdev->quota);
1789 int tx_cleaned;
1790 int work_done = 0;
1791
1792 tx_cleaned = ixgb_clean_tx_irq(adapter);
1793 ixgb_clean_rx_irq(adapter, &work_done, work_to_do);
1794
1795 *budget -= work_done;
1796 netdev->quota -= work_done;
1797
1798 /* if no Tx and not enough Rx work done, exit the polling mode */
1799 if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
1800 netif_rx_complete(netdev);
1801 ixgb_irq_enable(adapter);
1802 return 0;
1803 }
1804
1805 return 1;
1806 }
1807 #endif
1808
1809 /**
1810 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1811 * @adapter: board private structure
1812 **/
1813
1814 static boolean_t
1815 ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1816 {
1817 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1818 struct net_device *netdev = adapter->netdev;
1819 struct ixgb_tx_desc *tx_desc, *eop_desc;
1820 struct ixgb_buffer *buffer_info;
1821 unsigned int i, eop;
1822 boolean_t cleaned = FALSE;
1823
1824 i = tx_ring->next_to_clean;
1825 eop = tx_ring->buffer_info[i].next_to_watch;
1826 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1827
1828 while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1829
1830 for(cleaned = FALSE; !cleaned; ) {
1831 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1832 buffer_info = &tx_ring->buffer_info[i];
1833
1834 if (tx_desc->popts
1835 & (IXGB_TX_DESC_POPTS_TXSM |
1836 IXGB_TX_DESC_POPTS_IXSM))
1837 adapter->hw_csum_tx_good++;
1838
1839 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1840
1841 *(uint32_t *)&(tx_desc->status) = 0;
1842
1843 cleaned = (i == eop);
1844 if(++i == tx_ring->count) i = 0;
1845 }
1846
1847 eop = tx_ring->buffer_info[i].next_to_watch;
1848 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1849 }
1850
1851 tx_ring->next_to_clean = i;
1852
1853 if (unlikely(netif_queue_stopped(netdev))) {
1854 spin_lock(&adapter->tx_lock);
1855 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
1856 (IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED))
1857 netif_wake_queue(netdev);
1858 spin_unlock(&adapter->tx_lock);
1859 }
1860
1861 if(adapter->detect_tx_hung) {
1862 /* detect a transmit hang in hardware, this serializes the
1863 * check with the clearing of time_stamp and movement of i */
1864 adapter->detect_tx_hung = FALSE;
1865 if (tx_ring->buffer_info[eop].dma &&
1866 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1867 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
1868 IXGB_STATUS_TXOFF)) {
1869 /* detected Tx unit hang */
1870 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1871 " TDH <%x>\n"
1872 " TDT <%x>\n"
1873 " next_to_use <%x>\n"
1874 " next_to_clean <%x>\n"
1875 "buffer_info[next_to_clean]\n"
1876 " time_stamp <%lx>\n"
1877 " next_to_watch <%x>\n"
1878 " jiffies <%lx>\n"
1879 " next_to_watch.status <%x>\n",
1880 IXGB_READ_REG(&adapter->hw, TDH),
1881 IXGB_READ_REG(&adapter->hw, TDT),
1882 tx_ring->next_to_use,
1883 tx_ring->next_to_clean,
1884 tx_ring->buffer_info[eop].time_stamp,
1885 eop,
1886 jiffies,
1887 eop_desc->status);
1888 netif_stop_queue(netdev);
1889 }
1890 }
1891
1892 return cleaned;
1893 }
1894
1895 /**
1896 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1897 * @adapter: board private structure
1898 * @rx_desc: receive descriptor
1899 * @sk_buff: socket buffer with received data
1900 **/
1901
1902 static void
1903 ixgb_rx_checksum(struct ixgb_adapter *adapter,
1904 struct ixgb_rx_desc *rx_desc,
1905 struct sk_buff *skb)
1906 {
1907 /* Ignore Checksum bit is set OR
1908 * TCP Checksum has not been calculated
1909 */
1910 if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1911 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1912 skb->ip_summed = CHECKSUM_NONE;
1913 return;
1914 }
1915
1916 /* At this point we know the hardware did the TCP checksum */
1917 /* now look at the TCP checksum error bit */
1918 if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1919 /* let the stack verify checksum errors */
1920 skb->ip_summed = CHECKSUM_NONE;
1921 adapter->hw_csum_rx_error++;
1922 } else {
1923 /* TCP checksum is good */
1924 skb->ip_summed = CHECKSUM_UNNECESSARY;
1925 adapter->hw_csum_rx_good++;
1926 }
1927 }
1928
1929 /**
1930 * ixgb_clean_rx_irq - Send received data up the network stack,
1931 * @adapter: board private structure
1932 **/
1933
1934 static boolean_t
1935 #ifdef CONFIG_IXGB_NAPI
1936 ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1937 #else
1938 ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1939 #endif
1940 {
1941 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1942 struct net_device *netdev = adapter->netdev;
1943 struct pci_dev *pdev = adapter->pdev;
1944 struct ixgb_rx_desc *rx_desc, *next_rxd;
1945 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
1946 uint32_t length;
1947 unsigned int i, j;
1948 boolean_t cleaned = FALSE;
1949
1950 i = rx_ring->next_to_clean;
1951 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1952 buffer_info = &rx_ring->buffer_info[i];
1953
1954 while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
1955 struct sk_buff *skb, *next_skb;
1956 u8 status;
1957
1958 #ifdef CONFIG_IXGB_NAPI
1959 if(*work_done >= work_to_do)
1960 break;
1961
1962 (*work_done)++;
1963 #endif
1964 status = rx_desc->status;
1965 skb = buffer_info->skb;
1966 buffer_info->skb = NULL;
1967
1968 prefetch(skb->data);
1969
1970 if(++i == rx_ring->count) i = 0;
1971 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1972 prefetch(next_rxd);
1973
1974 if((j = i + 1) == rx_ring->count) j = 0;
1975 next2_buffer = &rx_ring->buffer_info[j];
1976 prefetch(next2_buffer);
1977
1978 next_buffer = &rx_ring->buffer_info[i];
1979 next_skb = next_buffer->skb;
1980 prefetch(next_skb);
1981
1982 cleaned = TRUE;
1983
1984 pci_unmap_single(pdev,
1985 buffer_info->dma,
1986 buffer_info->length,
1987 PCI_DMA_FROMDEVICE);
1988
1989 length = le16_to_cpu(rx_desc->length);
1990
1991 if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1992
1993 /* All receives must fit into a single buffer */
1994
1995 IXGB_DBG("Receive packet consumed multiple buffers "
1996 "length<%x>\n", length);
1997
1998 dev_kfree_skb_irq(skb);
1999 goto rxdesc_done;
2000 }
2001
2002 if (unlikely(rx_desc->errors
2003 & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
2004 | IXGB_RX_DESC_ERRORS_P |
2005 IXGB_RX_DESC_ERRORS_RXE))) {
2006
2007 dev_kfree_skb_irq(skb);
2008 goto rxdesc_done;
2009 }
2010
2011 /* code added for copybreak, this should improve
2012 * performance for small packets with large amounts
2013 * of reassembly being done in the stack */
2014 #define IXGB_CB_LENGTH 256
2015 if (length < IXGB_CB_LENGTH) {
2016 struct sk_buff *new_skb =
2017 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
2018 if (new_skb) {
2019 skb_reserve(new_skb, NET_IP_ALIGN);
2020 skb_copy_to_linear_data_offset(new_skb,
2021 -NET_IP_ALIGN,
2022 (skb->data -
2023 NET_IP_ALIGN),
2024 (length +
2025 NET_IP_ALIGN));
2026 /* save the skb in buffer_info as good */
2027 buffer_info->skb = skb;
2028 skb = new_skb;
2029 }
2030 }
2031 /* end copybreak code */
2032
2033 /* Good Receive */
2034 skb_put(skb, length);
2035
2036 /* Receive Checksum Offload */
2037 ixgb_rx_checksum(adapter, rx_desc, skb);
2038
2039 skb->protocol = eth_type_trans(skb, netdev);
2040 #ifdef CONFIG_IXGB_NAPI
2041 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2042 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2043 le16_to_cpu(rx_desc->special) &
2044 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2045 } else {
2046 netif_receive_skb(skb);
2047 }
2048 #else /* CONFIG_IXGB_NAPI */
2049 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2050 vlan_hwaccel_rx(skb, adapter->vlgrp,
2051 le16_to_cpu(rx_desc->special) &
2052 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2053 } else {
2054 netif_rx(skb);
2055 }
2056 #endif /* CONFIG_IXGB_NAPI */
2057 netdev->last_rx = jiffies;
2058
2059 rxdesc_done:
2060 /* clean up descriptor, might be written over by hw */
2061 rx_desc->status = 0;
2062
2063 /* use prefetched values */
2064 rx_desc = next_rxd;
2065 buffer_info = next_buffer;
2066 }
2067
2068 rx_ring->next_to_clean = i;
2069
2070 ixgb_alloc_rx_buffers(adapter);
2071
2072 return cleaned;
2073 }
2074
2075 /**
2076 * ixgb_alloc_rx_buffers - Replace used receive buffers
2077 * @adapter: address of board private structure
2078 **/
2079
2080 static void
2081 ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
2082 {
2083 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2084 struct net_device *netdev = adapter->netdev;
2085 struct pci_dev *pdev = adapter->pdev;
2086 struct ixgb_rx_desc *rx_desc;
2087 struct ixgb_buffer *buffer_info;
2088 struct sk_buff *skb;
2089 unsigned int i;
2090 int num_group_tail_writes;
2091 long cleancount;
2092
2093 i = rx_ring->next_to_use;
2094 buffer_info = &rx_ring->buffer_info[i];
2095 cleancount = IXGB_DESC_UNUSED(rx_ring);
2096
2097 num_group_tail_writes = IXGB_RX_BUFFER_WRITE;
2098
2099 /* leave three descriptors unused */
2100 while(--cleancount > 2) {
2101 /* recycle! its good for you */
2102 skb = buffer_info->skb;
2103 if (skb) {
2104 skb_trim(skb, 0);
2105 goto map_skb;
2106 }
2107
2108 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2109 + NET_IP_ALIGN);
2110 if (unlikely(!skb)) {
2111 /* Better luck next round */
2112 adapter->alloc_rx_buff_failed++;
2113 break;
2114 }
2115
2116 /* Make buffer alignment 2 beyond a 16 byte boundary
2117 * this will result in a 16 byte aligned IP header after
2118 * the 14 byte MAC header is removed
2119 */
2120 skb_reserve(skb, NET_IP_ALIGN);
2121
2122 buffer_info->skb = skb;
2123 buffer_info->length = adapter->rx_buffer_len;
2124 map_skb:
2125 buffer_info->dma = pci_map_single(pdev,
2126 skb->data,
2127 adapter->rx_buffer_len,
2128 PCI_DMA_FROMDEVICE);
2129
2130 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2131 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
2132 /* guarantee DD bit not set now before h/w gets descriptor
2133 * this is the rest of the workaround for h/w double
2134 * writeback. */
2135 rx_desc->status = 0;
2136
2137
2138 if(++i == rx_ring->count) i = 0;
2139 buffer_info = &rx_ring->buffer_info[i];
2140 }
2141
2142 if (likely(rx_ring->next_to_use != i)) {
2143 rx_ring->next_to_use = i;
2144 if (unlikely(i-- == 0))
2145 i = (rx_ring->count - 1);
2146
2147 /* Force memory writes to complete before letting h/w
2148 * know there are new descriptors to fetch. (Only
2149 * applicable for weak-ordered memory model archs, such
2150 * as IA-64). */
2151 wmb();
2152 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2153 }
2154 }
2155
2156 /**
2157 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2158 *
2159 * @param netdev network interface device structure
2160 * @param grp indicates to enable or disable tagging/stripping
2161 **/
2162 static void
2163 ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2164 {
2165 struct ixgb_adapter *adapter = netdev_priv(netdev);
2166 uint32_t ctrl, rctl;
2167
2168 ixgb_irq_disable(adapter);
2169 adapter->vlgrp = grp;
2170
2171 if(grp) {
2172 /* enable VLAN tag insert/strip */
2173 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2174 ctrl |= IXGB_CTRL0_VME;
2175 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2176
2177 /* enable VLAN receive filtering */
2178
2179 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2180 rctl |= IXGB_RCTL_VFE;
2181 rctl &= ~IXGB_RCTL_CFIEN;
2182 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2183 } else {
2184 /* disable VLAN tag insert/strip */
2185
2186 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2187 ctrl &= ~IXGB_CTRL0_VME;
2188 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2189
2190 /* disable VLAN filtering */
2191
2192 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2193 rctl &= ~IXGB_RCTL_VFE;
2194 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2195 }
2196
2197 ixgb_irq_enable(adapter);
2198 }
2199
2200 static void
2201 ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
2202 {
2203 struct ixgb_adapter *adapter = netdev_priv(netdev);
2204 uint32_t vfta, index;
2205
2206 /* add VID to filter table */
2207
2208 index = (vid >> 5) & 0x7F;
2209 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2210 vfta |= (1 << (vid & 0x1F));
2211 ixgb_write_vfta(&adapter->hw, index, vfta);
2212 }
2213
2214 static void
2215 ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
2216 {
2217 struct ixgb_adapter *adapter = netdev_priv(netdev);
2218 uint32_t vfta, index;
2219
2220 ixgb_irq_disable(adapter);
2221
2222 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2223
2224 ixgb_irq_enable(adapter);
2225
2226 /* remove VID from filter table*/
2227
2228 index = (vid >> 5) & 0x7F;
2229 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2230 vfta &= ~(1 << (vid & 0x1F));
2231 ixgb_write_vfta(&adapter->hw, index, vfta);
2232 }
2233
2234 static void
2235 ixgb_restore_vlan(struct ixgb_adapter *adapter)
2236 {
2237 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2238
2239 if(adapter->vlgrp) {
2240 uint16_t vid;
2241 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2242 if(!vlan_group_get_device(adapter->vlgrp, vid))
2243 continue;
2244 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2245 }
2246 }
2247 }
2248
2249 #ifdef CONFIG_NET_POLL_CONTROLLER
2250 /*
2251 * Polling 'interrupt' - used by things like netconsole to send skbs
2252 * without having to re-enable interrupts. It's not called while
2253 * the interrupt routine is executing.
2254 */
2255
2256 static void ixgb_netpoll(struct net_device *dev)
2257 {
2258 struct ixgb_adapter *adapter = netdev_priv(dev);
2259
2260 disable_irq(adapter->pdev->irq);
2261 ixgb_intr(adapter->pdev->irq, dev);
2262 enable_irq(adapter->pdev->irq);
2263 }
2264 #endif
2265
2266 /**
2267 * ixgb_io_error_detected() - called when PCI error is detected
2268 * @pdev pointer to pci device with error
2269 * @state pci channel state after error
2270 *
2271 * This callback is called by the PCI subsystem whenever
2272 * a PCI bus error is detected.
2273 */
2274 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
2275 enum pci_channel_state state)
2276 {
2277 struct net_device *netdev = pci_get_drvdata(pdev);
2278 struct ixgb_adapter *adapter = netdev_priv(netdev);
2279
2280 if(netif_running(netdev))
2281 ixgb_down(adapter, TRUE);
2282
2283 pci_disable_device(pdev);
2284
2285 /* Request a slot reset. */
2286 return PCI_ERS_RESULT_NEED_RESET;
2287 }
2288
2289 /**
2290 * ixgb_io_slot_reset - called after the pci bus has been reset.
2291 * @pdev pointer to pci device with error
2292 *
2293 * This callback is called after the PCI buss has been reset.
2294 * Basically, this tries to restart the card from scratch.
2295 * This is a shortened version of the device probe/discovery code,
2296 * it resembles the first-half of the ixgb_probe() routine.
2297 */
2298 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev)
2299 {
2300 struct net_device *netdev = pci_get_drvdata(pdev);
2301 struct ixgb_adapter *adapter = netdev_priv(netdev);
2302
2303 if(pci_enable_device(pdev)) {
2304 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2305 return PCI_ERS_RESULT_DISCONNECT;
2306 }
2307
2308 /* Perform card reset only on one instance of the card */
2309 if (0 != PCI_FUNC (pdev->devfn))
2310 return PCI_ERS_RESULT_RECOVERED;
2311
2312 pci_set_master(pdev);
2313
2314 netif_carrier_off(netdev);
2315 netif_stop_queue(netdev);
2316 ixgb_reset(adapter);
2317
2318 /* Make sure the EEPROM is good */
2319 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
2320 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2321 return PCI_ERS_RESULT_DISCONNECT;
2322 }
2323 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2324 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2325
2326 if(!is_valid_ether_addr(netdev->perm_addr)) {
2327 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2328 return PCI_ERS_RESULT_DISCONNECT;
2329 }
2330
2331 return PCI_ERS_RESULT_RECOVERED;
2332 }
2333
2334 /**
2335 * ixgb_io_resume - called when its OK to resume normal operations
2336 * @pdev pointer to pci device with error
2337 *
2338 * The error recovery driver tells us that its OK to resume
2339 * normal operation. Implementation resembles the second-half
2340 * of the ixgb_probe() routine.
2341 */
2342 static void ixgb_io_resume (struct pci_dev *pdev)
2343 {
2344 struct net_device *netdev = pci_get_drvdata(pdev);
2345 struct ixgb_adapter *adapter = netdev_priv(netdev);
2346
2347 pci_set_master(pdev);
2348
2349 if(netif_running(netdev)) {
2350 if(ixgb_up(adapter)) {
2351 printk ("ixgb: can't bring device back up after reset\n");
2352 return;
2353 }
2354 }
2355
2356 netif_device_attach(netdev);
2357 mod_timer(&adapter->watchdog_timer, jiffies);
2358 }
2359
2360 /* ixgb_main.c */
CJK support for tty framebuffer vt