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1 /*******************************************************************************
2
3
4 Copyright(c) 1999 - 2005 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 * 1.0.96 04/19/05
33 * - Make needlessly global code static -- bunk@stusta.de
34 * - ethtool cleanup -- shemminger@osdl.org
35 * - Support for MODULE_VERSION -- linville@tuxdriver.com
36 * - add skb_header_cloned check to the tso path -- herbert@apana.org.au
37 * 1.0.88 01/05/05
38 * - include fix to the condition that determines when to quit NAPI - Robert Olsson
39 * - use netif_poll_{disable/enable} to synchronize between NAPI and i/f up/down
40 * 1.0.84 10/26/04
41 * - reset buffer_info->dma in Tx resource cleanup logic
42 * 1.0.83 10/12/04
43 * - sparse cleanup - shemminger@osdl.org
44 * - fix tx resource cleanup logic
45 */
46
47 char ixgb_driver_name[] = "ixgb";
48 static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
49
50 #ifndef CONFIG_IXGB_NAPI
51 #define DRIVERNAPI
52 #else
53 #define DRIVERNAPI "-NAPI"
54 #endif
55 #define DRV_VERSION "1.0.104-k2"DRIVERNAPI
56 char ixgb_driver_version[] = DRV_VERSION;
57 static char ixgb_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
58
59 /* ixgb_pci_tbl - PCI Device ID Table
60 *
61 * Wildcard entries (PCI_ANY_ID) should come last
62 * Last entry must be all 0s
63 *
64 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
65 * Class, Class Mask, private data (not used) }
66 */
67 static struct pci_device_id ixgb_pci_tbl[] = {
68 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
69 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
70 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
71 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
72 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
73 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
74 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
75 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
76
77 /* required last entry */
78 {0,}
79 };
80
81 MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
82
83 /* Local Function Prototypes */
84
85 int ixgb_up(struct ixgb_adapter *adapter);
86 void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog);
87 void ixgb_reset(struct ixgb_adapter *adapter);
88 int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
89 int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
90 void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
91 void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
92 void ixgb_update_stats(struct ixgb_adapter *adapter);
93
94 static int ixgb_init_module(void);
95 static void ixgb_exit_module(void);
96 static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
97 static void __devexit ixgb_remove(struct pci_dev *pdev);
98 static int ixgb_sw_init(struct ixgb_adapter *adapter);
99 static int ixgb_open(struct net_device *netdev);
100 static int ixgb_close(struct net_device *netdev);
101 static void ixgb_configure_tx(struct ixgb_adapter *adapter);
102 static void ixgb_configure_rx(struct ixgb_adapter *adapter);
103 static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
104 static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
105 static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
106 static void ixgb_set_multi(struct net_device *netdev);
107 static void ixgb_watchdog(unsigned long data);
108 static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
109 static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
110 static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
111 static int ixgb_set_mac(struct net_device *netdev, void *p);
112 static irqreturn_t ixgb_intr(int irq, void *data, struct pt_regs *regs);
113 static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
114
115 #ifdef CONFIG_IXGB_NAPI
116 static int ixgb_clean(struct net_device *netdev, int *budget);
117 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter,
118 int *work_done, int work_to_do);
119 #else
120 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter);
121 #endif
122 static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter);
123 void ixgb_set_ethtool_ops(struct net_device *netdev);
124 static void ixgb_tx_timeout(struct net_device *dev);
125 static void ixgb_tx_timeout_task(struct net_device *dev);
126 static void ixgb_vlan_rx_register(struct net_device *netdev,
127 struct vlan_group *grp);
128 static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
129 static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
130 static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
131
132 #ifdef CONFIG_NET_POLL_CONTROLLER
133 /* for netdump / net console */
134 static void ixgb_netpoll(struct net_device *dev);
135 #endif
136
137 /* Exported from other modules */
138
139 extern void ixgb_check_options(struct ixgb_adapter *adapter);
140
141 static struct pci_driver ixgb_driver = {
142 .name = ixgb_driver_name,
143 .id_table = ixgb_pci_tbl,
144 .probe = ixgb_probe,
145 .remove = __devexit_p(ixgb_remove),
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 MODULE_VERSION(DRV_VERSION);
152
153 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
154 static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
155 module_param(debug, int, 0);
156 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
157
158 /* some defines for controlling descriptor fetches in h/w */
159 #define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */
160 #define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
161 * this */
162 #define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
163 * is pushed this many descriptors
164 * from head */
165
166 /**
167 * ixgb_init_module - Driver Registration Routine
168 *
169 * ixgb_init_module is the first routine called when the driver is
170 * loaded. All it does is register with the PCI subsystem.
171 **/
172
173 static int __init
174 ixgb_init_module(void)
175 {
176 printk(KERN_INFO "%s - version %s\n",
177 ixgb_driver_string, ixgb_driver_version);
178
179 printk(KERN_INFO "%s\n", ixgb_copyright);
180
181 return pci_module_init(&ixgb_driver);
182 }
183
184 module_init(ixgb_init_module);
185
186 /**
187 * ixgb_exit_module - Driver Exit Cleanup Routine
188 *
189 * ixgb_exit_module is called just before the driver is removed
190 * from memory.
191 **/
192
193 static void __exit
194 ixgb_exit_module(void)
195 {
196 pci_unregister_driver(&ixgb_driver);
197 }
198
199 module_exit(ixgb_exit_module);
200
201 /**
202 * ixgb_irq_disable - Mask off interrupt generation on the NIC
203 * @adapter: board private structure
204 **/
205
206 static inline void
207 ixgb_irq_disable(struct ixgb_adapter *adapter)
208 {
209 atomic_inc(&adapter->irq_sem);
210 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
211 IXGB_WRITE_FLUSH(&adapter->hw);
212 synchronize_irq(adapter->pdev->irq);
213 }
214
215 /**
216 * ixgb_irq_enable - Enable default interrupt generation settings
217 * @adapter: board private structure
218 **/
219
220 static inline void
221 ixgb_irq_enable(struct ixgb_adapter *adapter)
222 {
223 if(atomic_dec_and_test(&adapter->irq_sem)) {
224 IXGB_WRITE_REG(&adapter->hw, IMS,
225 IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW |
226 IXGB_INT_LSC);
227 IXGB_WRITE_FLUSH(&adapter->hw);
228 }
229 }
230
231 int
232 ixgb_up(struct ixgb_adapter *adapter)
233 {
234 struct net_device *netdev = adapter->netdev;
235 int err;
236 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
237 struct ixgb_hw *hw = &adapter->hw;
238
239 /* hardware has been reset, we need to reload some things */
240
241 ixgb_set_multi(netdev);
242
243 ixgb_restore_vlan(adapter);
244
245 ixgb_configure_tx(adapter);
246 ixgb_setup_rctl(adapter);
247 ixgb_configure_rx(adapter);
248 ixgb_alloc_rx_buffers(adapter);
249
250 #ifdef CONFIG_PCI_MSI
251 {
252 boolean_t pcix = (IXGB_READ_REG(&adapter->hw, STATUS) &
253 IXGB_STATUS_PCIX_MODE) ? TRUE : FALSE;
254 adapter->have_msi = TRUE;
255
256 if (!pcix)
257 adapter->have_msi = FALSE;
258 else if((err = pci_enable_msi(adapter->pdev))) {
259 DPRINTK(PROBE, ERR,
260 "Unable to allocate MSI interrupt Error: %d\n", err);
261 adapter->have_msi = FALSE;
262 /* proceed to try to request regular interrupt */
263 }
264 }
265
266 #endif
267 if((err = request_irq(adapter->pdev->irq, &ixgb_intr,
268 SA_SHIRQ | SA_SAMPLE_RANDOM,
269 netdev->name, netdev))) {
270 DPRINTK(PROBE, ERR,
271 "Unable to allocate interrupt Error: %d\n", err);
272 return err;
273 }
274
275 /* disable interrupts and get the hardware into a known state */
276 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
277
278 if((hw->max_frame_size != max_frame) ||
279 (hw->max_frame_size !=
280 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
281
282 hw->max_frame_size = max_frame;
283
284 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
285
286 if(hw->max_frame_size >
287 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
288 uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0);
289
290 if(!(ctrl0 & IXGB_CTRL0_JFE)) {
291 ctrl0 |= IXGB_CTRL0_JFE;
292 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
293 }
294 }
295 }
296
297 mod_timer(&adapter->watchdog_timer, jiffies);
298 ixgb_irq_enable(adapter);
299
300 #ifdef CONFIG_IXGB_NAPI
301 netif_poll_enable(netdev);
302 #endif
303 return 0;
304 }
305
306 void
307 ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog)
308 {
309 struct net_device *netdev = adapter->netdev;
310
311 ixgb_irq_disable(adapter);
312 free_irq(adapter->pdev->irq, netdev);
313 #ifdef CONFIG_PCI_MSI
314 if(adapter->have_msi == TRUE)
315 pci_disable_msi(adapter->pdev);
316
317 #endif
318 if(kill_watchdog)
319 del_timer_sync(&adapter->watchdog_timer);
320 #ifdef CONFIG_IXGB_NAPI
321 netif_poll_disable(netdev);
322 #endif
323 adapter->link_speed = 0;
324 adapter->link_duplex = 0;
325 netif_carrier_off(netdev);
326 netif_stop_queue(netdev);
327
328 ixgb_reset(adapter);
329 ixgb_clean_tx_ring(adapter);
330 ixgb_clean_rx_ring(adapter);
331 }
332
333 void
334 ixgb_reset(struct ixgb_adapter *adapter)
335 {
336
337 ixgb_adapter_stop(&adapter->hw);
338 if(!ixgb_init_hw(&adapter->hw))
339 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
340 }
341
342 /**
343 * ixgb_probe - Device Initialization Routine
344 * @pdev: PCI device information struct
345 * @ent: entry in ixgb_pci_tbl
346 *
347 * Returns 0 on success, negative on failure
348 *
349 * ixgb_probe initializes an adapter identified by a pci_dev structure.
350 * The OS initialization, configuring of the adapter private structure,
351 * and a hardware reset occur.
352 **/
353
354 static int __devinit
355 ixgb_probe(struct pci_dev *pdev,
356 const struct pci_device_id *ent)
357 {
358 struct net_device *netdev = NULL;
359 struct ixgb_adapter *adapter;
360 static int cards_found = 0;
361 unsigned long mmio_start;
362 int mmio_len;
363 int pci_using_dac;
364 int i;
365 int err;
366
367 if((err = pci_enable_device(pdev)))
368 return err;
369
370 if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
371 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
372 pci_using_dac = 1;
373 } else {
374 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
375 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
376 printk(KERN_ERR
377 "ixgb: No usable DMA configuration, aborting\n");
378 goto err_dma_mask;
379 }
380 pci_using_dac = 0;
381 }
382
383 if((err = pci_request_regions(pdev, ixgb_driver_name)))
384 goto err_request_regions;
385
386 pci_set_master(pdev);
387
388 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
389 if(!netdev) {
390 err = -ENOMEM;
391 goto err_alloc_etherdev;
392 }
393
394 SET_MODULE_OWNER(netdev);
395 SET_NETDEV_DEV(netdev, &pdev->dev);
396
397 pci_set_drvdata(pdev, netdev);
398 adapter = netdev_priv(netdev);
399 adapter->netdev = netdev;
400 adapter->pdev = pdev;
401 adapter->hw.back = adapter;
402 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
403
404 mmio_start = pci_resource_start(pdev, BAR_0);
405 mmio_len = pci_resource_len(pdev, BAR_0);
406
407 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
408 if(!adapter->hw.hw_addr) {
409 err = -EIO;
410 goto err_ioremap;
411 }
412
413 for(i = BAR_1; i <= BAR_5; i++) {
414 if(pci_resource_len(pdev, i) == 0)
415 continue;
416 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
417 adapter->hw.io_base = pci_resource_start(pdev, i);
418 break;
419 }
420 }
421
422 netdev->open = &ixgb_open;
423 netdev->stop = &ixgb_close;
424 netdev->hard_start_xmit = &ixgb_xmit_frame;
425 netdev->get_stats = &ixgb_get_stats;
426 netdev->set_multicast_list = &ixgb_set_multi;
427 netdev->set_mac_address = &ixgb_set_mac;
428 netdev->change_mtu = &ixgb_change_mtu;
429 ixgb_set_ethtool_ops(netdev);
430 netdev->tx_timeout = &ixgb_tx_timeout;
431 netdev->watchdog_timeo = 5 * HZ;
432 #ifdef CONFIG_IXGB_NAPI
433 netdev->poll = &ixgb_clean;
434 netdev->weight = 64;
435 #endif
436 netdev->vlan_rx_register = ixgb_vlan_rx_register;
437 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
438 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
439 #ifdef CONFIG_NET_POLL_CONTROLLER
440 netdev->poll_controller = ixgb_netpoll;
441 #endif
442
443 strcpy(netdev->name, pci_name(pdev));
444 netdev->mem_start = mmio_start;
445 netdev->mem_end = mmio_start + mmio_len;
446 netdev->base_addr = adapter->hw.io_base;
447
448 adapter->bd_number = cards_found;
449 adapter->link_speed = 0;
450 adapter->link_duplex = 0;
451
452 /* setup the private structure */
453
454 if((err = ixgb_sw_init(adapter)))
455 goto err_sw_init;
456
457 netdev->features = NETIF_F_SG |
458 NETIF_F_HW_CSUM |
459 NETIF_F_HW_VLAN_TX |
460 NETIF_F_HW_VLAN_RX |
461 NETIF_F_HW_VLAN_FILTER;
462 #ifdef NETIF_F_TSO
463 netdev->features |= NETIF_F_TSO;
464 #endif
465 #ifdef NETIF_F_LLTX
466 netdev->features |= NETIF_F_LLTX;
467 #endif
468
469 if(pci_using_dac)
470 netdev->features |= NETIF_F_HIGHDMA;
471
472 /* make sure the EEPROM is good */
473
474 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
475 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
476 err = -EIO;
477 goto err_eeprom;
478 }
479
480 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
481 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
482
483 if(!is_valid_ether_addr(netdev->perm_addr)) {
484 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
485 err = -EIO;
486 goto err_eeprom;
487 }
488
489 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
490
491 init_timer(&adapter->watchdog_timer);
492 adapter->watchdog_timer.function = &ixgb_watchdog;
493 adapter->watchdog_timer.data = (unsigned long)adapter;
494
495 INIT_WORK(&adapter->tx_timeout_task,
496 (void (*)(void *))ixgb_tx_timeout_task, netdev);
497
498 strcpy(netdev->name, "eth%d");
499 if((err = register_netdev(netdev)))
500 goto err_register;
501
502 /* we're going to reset, so assume we have no link for now */
503
504 netif_carrier_off(netdev);
505 netif_stop_queue(netdev);
506
507 DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
508 ixgb_check_options(adapter);
509 /* reset the hardware with the new settings */
510
511 ixgb_reset(adapter);
512
513 cards_found++;
514 return 0;
515
516 err_register:
517 err_sw_init:
518 err_eeprom:
519 iounmap(adapter->hw.hw_addr);
520 err_ioremap:
521 free_netdev(netdev);
522 err_alloc_etherdev:
523 pci_release_regions(pdev);
524 err_request_regions:
525 err_dma_mask:
526 pci_disable_device(pdev);
527 return err;
528 }
529
530 /**
531 * ixgb_remove - Device Removal Routine
532 * @pdev: PCI device information struct
533 *
534 * ixgb_remove is called by the PCI subsystem to alert the driver
535 * that it should release a PCI device. The could be caused by a
536 * Hot-Plug event, or because the driver is going to be removed from
537 * memory.
538 **/
539
540 static void __devexit
541 ixgb_remove(struct pci_dev *pdev)
542 {
543 struct net_device *netdev = pci_get_drvdata(pdev);
544 struct ixgb_adapter *adapter = netdev_priv(netdev);
545
546 unregister_netdev(netdev);
547
548 iounmap(adapter->hw.hw_addr);
549 pci_release_regions(pdev);
550
551 free_netdev(netdev);
552 }
553
554 /**
555 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
556 * @adapter: board private structure to initialize
557 *
558 * ixgb_sw_init initializes the Adapter private data structure.
559 * Fields are initialized based on PCI device information and
560 * OS network device settings (MTU size).
561 **/
562
563 static int __devinit
564 ixgb_sw_init(struct ixgb_adapter *adapter)
565 {
566 struct ixgb_hw *hw = &adapter->hw;
567 struct net_device *netdev = adapter->netdev;
568 struct pci_dev *pdev = adapter->pdev;
569
570 /* PCI config space info */
571
572 hw->vendor_id = pdev->vendor;
573 hw->device_id = pdev->device;
574 hw->subsystem_vendor_id = pdev->subsystem_vendor;
575 hw->subsystem_id = pdev->subsystem_device;
576
577 adapter->rx_buffer_len = IXGB_RXBUFFER_2048;
578
579 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
580
581 if((hw->device_id == IXGB_DEVICE_ID_82597EX)
582 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
583 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
584 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
585 hw->mac_type = ixgb_82597;
586 else {
587 /* should never have loaded on this device */
588 DPRINTK(PROBE, ERR, "unsupported device id\n");
589 }
590
591 /* enable flow control to be programmed */
592 hw->fc.send_xon = 1;
593
594 atomic_set(&adapter->irq_sem, 1);
595 spin_lock_init(&adapter->tx_lock);
596
597 return 0;
598 }
599
600 /**
601 * ixgb_open - Called when a network interface is made active
602 * @netdev: network interface device structure
603 *
604 * Returns 0 on success, negative value on failure
605 *
606 * The open entry point is called when a network interface is made
607 * active by the system (IFF_UP). At this point all resources needed
608 * for transmit and receive operations are allocated, the interrupt
609 * handler is registered with the OS, the watchdog timer is started,
610 * and the stack is notified that the interface is ready.
611 **/
612
613 static int
614 ixgb_open(struct net_device *netdev)
615 {
616 struct ixgb_adapter *adapter = netdev_priv(netdev);
617 int err;
618
619 /* allocate transmit descriptors */
620
621 if((err = ixgb_setup_tx_resources(adapter)))
622 goto err_setup_tx;
623
624 /* allocate receive descriptors */
625
626 if((err = ixgb_setup_rx_resources(adapter)))
627 goto err_setup_rx;
628
629 if((err = ixgb_up(adapter)))
630 goto err_up;
631
632 return 0;
633
634 err_up:
635 ixgb_free_rx_resources(adapter);
636 err_setup_rx:
637 ixgb_free_tx_resources(adapter);
638 err_setup_tx:
639 ixgb_reset(adapter);
640
641 return err;
642 }
643
644 /**
645 * ixgb_close - Disables a network interface
646 * @netdev: network interface device structure
647 *
648 * Returns 0, this is not allowed to fail
649 *
650 * The close entry point is called when an interface is de-activated
651 * by the OS. The hardware is still under the drivers control, but
652 * needs to be disabled. A global MAC reset is issued to stop the
653 * hardware, and all transmit and receive resources are freed.
654 **/
655
656 static int
657 ixgb_close(struct net_device *netdev)
658 {
659 struct ixgb_adapter *adapter = netdev_priv(netdev);
660
661 ixgb_down(adapter, TRUE);
662
663 ixgb_free_tx_resources(adapter);
664 ixgb_free_rx_resources(adapter);
665
666 return 0;
667 }
668
669 /**
670 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
671 * @adapter: board private structure
672 *
673 * Return 0 on success, negative on failure
674 **/
675
676 int
677 ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
678 {
679 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
680 struct pci_dev *pdev = adapter->pdev;
681 int size;
682
683 size = sizeof(struct ixgb_buffer) * txdr->count;
684 txdr->buffer_info = vmalloc(size);
685 if(!txdr->buffer_info) {
686 DPRINTK(PROBE, ERR,
687 "Unable to allocate transmit descriptor ring memory\n");
688 return -ENOMEM;
689 }
690 memset(txdr->buffer_info, 0, size);
691
692 /* round up to nearest 4K */
693
694 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
695 IXGB_ROUNDUP(txdr->size, 4096);
696
697 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
698 if(!txdr->desc) {
699 vfree(txdr->buffer_info);
700 DPRINTK(PROBE, ERR,
701 "Unable to allocate transmit descriptor memory\n");
702 return -ENOMEM;
703 }
704 memset(txdr->desc, 0, txdr->size);
705
706 txdr->next_to_use = 0;
707 txdr->next_to_clean = 0;
708
709 return 0;
710 }
711
712 /**
713 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
714 * @adapter: board private structure
715 *
716 * Configure the Tx unit of the MAC after a reset.
717 **/
718
719 static void
720 ixgb_configure_tx(struct ixgb_adapter *adapter)
721 {
722 uint64_t tdba = adapter->tx_ring.dma;
723 uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
724 uint32_t tctl;
725 struct ixgb_hw *hw = &adapter->hw;
726
727 /* Setup the Base and Length of the Tx Descriptor Ring
728 * tx_ring.dma can be either a 32 or 64 bit value
729 */
730
731 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
732 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
733
734 IXGB_WRITE_REG(hw, TDLEN, tdlen);
735
736 /* Setup the HW Tx Head and Tail descriptor pointers */
737
738 IXGB_WRITE_REG(hw, TDH, 0);
739 IXGB_WRITE_REG(hw, TDT, 0);
740
741 /* don't set up txdctl, it induces performance problems if configured
742 * incorrectly */
743 /* Set the Tx Interrupt Delay register */
744
745 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
746
747 /* Program the Transmit Control Register */
748
749 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
750 IXGB_WRITE_REG(hw, TCTL, tctl);
751
752 /* Setup Transmit Descriptor Settings for this adapter */
753 adapter->tx_cmd_type =
754 IXGB_TX_DESC_TYPE
755 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
756 }
757
758 /**
759 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
760 * @adapter: board private structure
761 *
762 * Returns 0 on success, negative on failure
763 **/
764
765 int
766 ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
767 {
768 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
769 struct pci_dev *pdev = adapter->pdev;
770 int size;
771
772 size = sizeof(struct ixgb_buffer) * rxdr->count;
773 rxdr->buffer_info = vmalloc(size);
774 if(!rxdr->buffer_info) {
775 DPRINTK(PROBE, ERR,
776 "Unable to allocate receive descriptor ring\n");
777 return -ENOMEM;
778 }
779 memset(rxdr->buffer_info, 0, size);
780
781 /* Round up to nearest 4K */
782
783 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
784 IXGB_ROUNDUP(rxdr->size, 4096);
785
786 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
787
788 if(!rxdr->desc) {
789 vfree(rxdr->buffer_info);
790 DPRINTK(PROBE, ERR,
791 "Unable to allocate receive descriptors\n");
792 return -ENOMEM;
793 }
794 memset(rxdr->desc, 0, rxdr->size);
795
796 rxdr->next_to_clean = 0;
797 rxdr->next_to_use = 0;
798
799 return 0;
800 }
801
802 /**
803 * ixgb_setup_rctl - configure the receive control register
804 * @adapter: Board private structure
805 **/
806
807 static void
808 ixgb_setup_rctl(struct ixgb_adapter *adapter)
809 {
810 uint32_t rctl;
811
812 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
813
814 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
815
816 rctl |=
817 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
818 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
819 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
820
821 rctl |= IXGB_RCTL_SECRC;
822
823 switch (adapter->rx_buffer_len) {
824 case IXGB_RXBUFFER_2048:
825 default:
826 rctl |= IXGB_RCTL_BSIZE_2048;
827 break;
828 case IXGB_RXBUFFER_4096:
829 rctl |= IXGB_RCTL_BSIZE_4096;
830 break;
831 case IXGB_RXBUFFER_8192:
832 rctl |= IXGB_RCTL_BSIZE_8192;
833 break;
834 case IXGB_RXBUFFER_16384:
835 rctl |= IXGB_RCTL_BSIZE_16384;
836 break;
837 }
838
839 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
840 }
841
842 /**
843 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
844 * @adapter: board private structure
845 *
846 * Configure the Rx unit of the MAC after a reset.
847 **/
848
849 static void
850 ixgb_configure_rx(struct ixgb_adapter *adapter)
851 {
852 uint64_t rdba = adapter->rx_ring.dma;
853 uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
854 struct ixgb_hw *hw = &adapter->hw;
855 uint32_t rctl;
856 uint32_t rxcsum;
857 uint32_t rxdctl;
858
859 /* make sure receives are disabled while setting up the descriptors */
860
861 rctl = IXGB_READ_REG(hw, RCTL);
862 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
863
864 /* set the Receive Delay Timer Register */
865
866 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
867
868 /* Setup the Base and Length of the Rx Descriptor Ring */
869
870 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
871 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
872
873 IXGB_WRITE_REG(hw, RDLEN, rdlen);
874
875 /* Setup the HW Rx Head and Tail Descriptor Pointers */
876 IXGB_WRITE_REG(hw, RDH, 0);
877 IXGB_WRITE_REG(hw, RDT, 0);
878
879 /* set up pre-fetching of receive buffers so we get some before we
880 * run out (default hardware behavior is to run out before fetching
881 * more). This sets up to fetch if HTHRESH rx descriptors are avail
882 * and the descriptors in hw cache are below PTHRESH. This avoids
883 * the hardware behavior of fetching <=512 descriptors in a single
884 * burst that pre-empts all other activity, usually causing fifo
885 * overflows. */
886 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
887 rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT |
888 RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT |
889 RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
890 IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
891
892 /* Enable Receive Checksum Offload for TCP and UDP */
893 if(adapter->rx_csum == TRUE) {
894 rxcsum = IXGB_READ_REG(hw, RXCSUM);
895 rxcsum |= IXGB_RXCSUM_TUOFL;
896 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
897 }
898
899 /* Enable Receives */
900
901 IXGB_WRITE_REG(hw, RCTL, rctl);
902 }
903
904 /**
905 * ixgb_free_tx_resources - Free Tx Resources
906 * @adapter: board private structure
907 *
908 * Free all transmit software resources
909 **/
910
911 void
912 ixgb_free_tx_resources(struct ixgb_adapter *adapter)
913 {
914 struct pci_dev *pdev = adapter->pdev;
915
916 ixgb_clean_tx_ring(adapter);
917
918 vfree(adapter->tx_ring.buffer_info);
919 adapter->tx_ring.buffer_info = NULL;
920
921 pci_free_consistent(pdev, adapter->tx_ring.size,
922 adapter->tx_ring.desc, adapter->tx_ring.dma);
923
924 adapter->tx_ring.desc = NULL;
925 }
926
927 static inline void
928 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
929 struct ixgb_buffer *buffer_info)
930 {
931 struct pci_dev *pdev = adapter->pdev;
932 if(buffer_info->dma) {
933 pci_unmap_page(pdev,
934 buffer_info->dma,
935 buffer_info->length,
936 PCI_DMA_TODEVICE);
937 buffer_info->dma = 0;
938 }
939 if(buffer_info->skb) {
940 dev_kfree_skb_any(buffer_info->skb);
941 buffer_info->skb = NULL;
942 }
943 }
944
945 /**
946 * ixgb_clean_tx_ring - Free Tx Buffers
947 * @adapter: board private structure
948 **/
949
950 static void
951 ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
952 {
953 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
954 struct ixgb_buffer *buffer_info;
955 unsigned long size;
956 unsigned int i;
957
958 /* Free all the Tx ring sk_buffs */
959
960 for(i = 0; i < tx_ring->count; i++) {
961 buffer_info = &tx_ring->buffer_info[i];
962 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
963 }
964
965 size = sizeof(struct ixgb_buffer) * tx_ring->count;
966 memset(tx_ring->buffer_info, 0, size);
967
968 /* Zero out the descriptor ring */
969
970 memset(tx_ring->desc, 0, tx_ring->size);
971
972 tx_ring->next_to_use = 0;
973 tx_ring->next_to_clean = 0;
974
975 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
976 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
977 }
978
979 /**
980 * ixgb_free_rx_resources - Free Rx Resources
981 * @adapter: board private structure
982 *
983 * Free all receive software resources
984 **/
985
986 void
987 ixgb_free_rx_resources(struct ixgb_adapter *adapter)
988 {
989 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
990 struct pci_dev *pdev = adapter->pdev;
991
992 ixgb_clean_rx_ring(adapter);
993
994 vfree(rx_ring->buffer_info);
995 rx_ring->buffer_info = NULL;
996
997 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
998
999 rx_ring->desc = NULL;
1000 }
1001
1002 /**
1003 * ixgb_clean_rx_ring - Free Rx Buffers
1004 * @adapter: board private structure
1005 **/
1006
1007 static void
1008 ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
1009 {
1010 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1011 struct ixgb_buffer *buffer_info;
1012 struct pci_dev *pdev = adapter->pdev;
1013 unsigned long size;
1014 unsigned int i;
1015
1016 /* Free all the Rx ring sk_buffs */
1017
1018 for(i = 0; i < rx_ring->count; i++) {
1019 buffer_info = &rx_ring->buffer_info[i];
1020 if(buffer_info->skb) {
1021
1022 pci_unmap_single(pdev,
1023 buffer_info->dma,
1024 buffer_info->length,
1025 PCI_DMA_FROMDEVICE);
1026
1027 dev_kfree_skb(buffer_info->skb);
1028
1029 buffer_info->skb = NULL;
1030 }
1031 }
1032
1033 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1034 memset(rx_ring->buffer_info, 0, size);
1035
1036 /* Zero out the descriptor ring */
1037
1038 memset(rx_ring->desc, 0, rx_ring->size);
1039
1040 rx_ring->next_to_clean = 0;
1041 rx_ring->next_to_use = 0;
1042
1043 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1044 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1045 }
1046
1047 /**
1048 * ixgb_set_mac - Change the Ethernet Address of the NIC
1049 * @netdev: network interface device structure
1050 * @p: pointer to an address structure
1051 *
1052 * Returns 0 on success, negative on failure
1053 **/
1054
1055 static int
1056 ixgb_set_mac(struct net_device *netdev, void *p)
1057 {
1058 struct ixgb_adapter *adapter = netdev_priv(netdev);
1059 struct sockaddr *addr = p;
1060
1061 if(!is_valid_ether_addr(addr->sa_data))
1062 return -EADDRNOTAVAIL;
1063
1064 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1065
1066 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1067
1068 return 0;
1069 }
1070
1071 /**
1072 * ixgb_set_multi - Multicast and Promiscuous mode set
1073 * @netdev: network interface device structure
1074 *
1075 * The set_multi entry point is called whenever the multicast address
1076 * list or the network interface flags are updated. This routine is
1077 * responsible for configuring the hardware for proper multicast,
1078 * promiscuous mode, and all-multi behavior.
1079 **/
1080
1081 static void
1082 ixgb_set_multi(struct net_device *netdev)
1083 {
1084 struct ixgb_adapter *adapter = netdev_priv(netdev);
1085 struct ixgb_hw *hw = &adapter->hw;
1086 struct dev_mc_list *mc_ptr;
1087 uint32_t rctl;
1088 int i;
1089
1090 /* Check for Promiscuous and All Multicast modes */
1091
1092 rctl = IXGB_READ_REG(hw, RCTL);
1093
1094 if(netdev->flags & IFF_PROMISC) {
1095 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1096 } else if(netdev->flags & IFF_ALLMULTI) {
1097 rctl |= IXGB_RCTL_MPE;
1098 rctl &= ~IXGB_RCTL_UPE;
1099 } else {
1100 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1101 }
1102
1103 if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1104 rctl |= IXGB_RCTL_MPE;
1105 IXGB_WRITE_REG(hw, RCTL, rctl);
1106 } else {
1107 uint8_t mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS];
1108
1109 IXGB_WRITE_REG(hw, RCTL, rctl);
1110
1111 for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
1112 i++, mc_ptr = mc_ptr->next)
1113 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
1114 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1115
1116 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1117 }
1118 }
1119
1120 /**
1121 * ixgb_watchdog - Timer Call-back
1122 * @data: pointer to netdev cast into an unsigned long
1123 **/
1124
1125 static void
1126 ixgb_watchdog(unsigned long data)
1127 {
1128 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1129 struct net_device *netdev = adapter->netdev;
1130 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1131
1132 ixgb_check_for_link(&adapter->hw);
1133
1134 if (ixgb_check_for_bad_link(&adapter->hw)) {
1135 /* force the reset path */
1136 netif_stop_queue(netdev);
1137 }
1138
1139 if(adapter->hw.link_up) {
1140 if(!netif_carrier_ok(netdev)) {
1141 DPRINTK(LINK, INFO,
1142 "NIC Link is Up 10000 Mbps Full Duplex\n");
1143 adapter->link_speed = 10000;
1144 adapter->link_duplex = FULL_DUPLEX;
1145 netif_carrier_on(netdev);
1146 netif_wake_queue(netdev);
1147 }
1148 } else {
1149 if(netif_carrier_ok(netdev)) {
1150 adapter->link_speed = 0;
1151 adapter->link_duplex = 0;
1152 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1153 netif_carrier_off(netdev);
1154 netif_stop_queue(netdev);
1155
1156 }
1157 }
1158
1159 ixgb_update_stats(adapter);
1160
1161 if(!netif_carrier_ok(netdev)) {
1162 if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1163 /* We've lost link, so the controller stops DMA,
1164 * but we've got queued Tx work that's never going
1165 * to get done, so reset controller to flush Tx.
1166 * (Do the reset outside of interrupt context). */
1167 schedule_work(&adapter->tx_timeout_task);
1168 }
1169 }
1170
1171 /* Force detection of hung controller every watchdog period */
1172 adapter->detect_tx_hung = TRUE;
1173
1174 /* generate an interrupt to force clean up of any stragglers */
1175 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1176
1177 /* Reset the timer */
1178 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1179 }
1180
1181 #define IXGB_TX_FLAGS_CSUM 0x00000001
1182 #define IXGB_TX_FLAGS_VLAN 0x00000002
1183 #define IXGB_TX_FLAGS_TSO 0x00000004
1184
1185 static inline int
1186 ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1187 {
1188 #ifdef NETIF_F_TSO
1189 struct ixgb_context_desc *context_desc;
1190 unsigned int i;
1191 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1192 uint16_t ipcse, tucse, mss;
1193 int err;
1194
1195 if(likely(skb_shinfo(skb)->tso_size)) {
1196 if (skb_header_cloned(skb)) {
1197 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1198 if (err)
1199 return err;
1200 }
1201
1202 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
1203 mss = skb_shinfo(skb)->tso_size;
1204 skb->nh.iph->tot_len = 0;
1205 skb->nh.iph->check = 0;
1206 skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr,
1207 skb->nh.iph->daddr,
1208 0, IPPROTO_TCP, 0);
1209 ipcss = skb->nh.raw - skb->data;
1210 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
1211 ipcse = skb->h.raw - skb->data - 1;
1212 tucss = skb->h.raw - skb->data;
1213 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
1214 tucse = 0;
1215
1216 i = adapter->tx_ring.next_to_use;
1217 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1218
1219 context_desc->ipcss = ipcss;
1220 context_desc->ipcso = ipcso;
1221 context_desc->ipcse = cpu_to_le16(ipcse);
1222 context_desc->tucss = tucss;
1223 context_desc->tucso = tucso;
1224 context_desc->tucse = cpu_to_le16(tucse);
1225 context_desc->mss = cpu_to_le16(mss);
1226 context_desc->hdr_len = hdr_len;
1227 context_desc->status = 0;
1228 context_desc->cmd_type_len = cpu_to_le32(
1229 IXGB_CONTEXT_DESC_TYPE
1230 | IXGB_CONTEXT_DESC_CMD_TSE
1231 | IXGB_CONTEXT_DESC_CMD_IP
1232 | IXGB_CONTEXT_DESC_CMD_TCP
1233 | IXGB_CONTEXT_DESC_CMD_IDE
1234 | (skb->len - (hdr_len)));
1235
1236
1237 if(++i == adapter->tx_ring.count) i = 0;
1238 adapter->tx_ring.next_to_use = i;
1239
1240 return 1;
1241 }
1242 #endif
1243
1244 return 0;
1245 }
1246
1247 static inline boolean_t
1248 ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1249 {
1250 struct ixgb_context_desc *context_desc;
1251 unsigned int i;
1252 uint8_t css, cso;
1253
1254 if(likely(skb->ip_summed == CHECKSUM_HW)) {
1255 css = skb->h.raw - skb->data;
1256 cso = (skb->h.raw + skb->csum) - skb->data;
1257
1258 i = adapter->tx_ring.next_to_use;
1259 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1260
1261 context_desc->tucss = css;
1262 context_desc->tucso = cso;
1263 context_desc->tucse = 0;
1264 /* zero out any previously existing data in one instruction */
1265 *(uint32_t *)&(context_desc->ipcss) = 0;
1266 context_desc->status = 0;
1267 context_desc->hdr_len = 0;
1268 context_desc->mss = 0;
1269 context_desc->cmd_type_len =
1270 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1271 | IXGB_TX_DESC_CMD_IDE);
1272
1273 if(++i == adapter->tx_ring.count) i = 0;
1274 adapter->tx_ring.next_to_use = i;
1275
1276 return TRUE;
1277 }
1278
1279 return FALSE;
1280 }
1281
1282 #define IXGB_MAX_TXD_PWR 14
1283 #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1284
1285 static inline int
1286 ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1287 unsigned int first)
1288 {
1289 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1290 struct ixgb_buffer *buffer_info;
1291 int len = skb->len;
1292 unsigned int offset = 0, size, count = 0, i;
1293 unsigned int mss = skb_shinfo(skb)->tso_size;
1294
1295 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1296 unsigned int f;
1297
1298 len -= skb->data_len;
1299
1300 i = tx_ring->next_to_use;
1301
1302 while(len) {
1303 buffer_info = &tx_ring->buffer_info[i];
1304 size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE);
1305 /* Workaround for premature desc write-backs
1306 * in TSO mode. Append 4-byte sentinel desc */
1307 if(unlikely(mss && !nr_frags && size == len && size > 8))
1308 size -= 4;
1309
1310 buffer_info->length = size;
1311 buffer_info->dma =
1312 pci_map_single(adapter->pdev,
1313 skb->data + offset,
1314 size,
1315 PCI_DMA_TODEVICE);
1316 buffer_info->time_stamp = jiffies;
1317
1318 len -= size;
1319 offset += size;
1320 count++;
1321 if(++i == tx_ring->count) i = 0;
1322 }
1323
1324 for(f = 0; f < nr_frags; f++) {
1325 struct skb_frag_struct *frag;
1326
1327 frag = &skb_shinfo(skb)->frags[f];
1328 len = frag->size;
1329 offset = 0;
1330
1331 while(len) {
1332 buffer_info = &tx_ring->buffer_info[i];
1333 size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE);
1334 /* Workaround for premature desc write-backs
1335 * in TSO mode. Append 4-byte sentinel desc */
1336 if(unlikely(mss && (f == (nr_frags-1)) && (size == len)
1337 && (size > 8)))
1338 size -= 4;
1339
1340 buffer_info->length = size;
1341 buffer_info->dma =
1342 pci_map_page(adapter->pdev,
1343 frag->page,
1344 frag->page_offset + offset,
1345 size,
1346 PCI_DMA_TODEVICE);
1347 buffer_info->time_stamp = jiffies;
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 inline 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 /* Tx Descriptors needed, worst case */
1414 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1415 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1416 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \
1417 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 \
1418 /* one more for TSO workaround */ + 1
1419
1420 static int
1421 ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1422 {
1423 struct ixgb_adapter *adapter = netdev_priv(netdev);
1424 unsigned int first;
1425 unsigned int tx_flags = 0;
1426 unsigned long flags;
1427 int vlan_id = 0;
1428 int tso;
1429
1430 if(skb->len <= 0) {
1431 dev_kfree_skb_any(skb);
1432 return 0;
1433 }
1434
1435 #ifdef NETIF_F_LLTX
1436 local_irq_save(flags);
1437 if (!spin_trylock(&adapter->tx_lock)) {
1438 /* Collision - tell upper layer to requeue */
1439 local_irq_restore(flags);
1440 return NETDEV_TX_LOCKED;
1441 }
1442 #else
1443 spin_lock_irqsave(&adapter->tx_lock, flags);
1444 #endif
1445
1446 if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) {
1447 netif_stop_queue(netdev);
1448 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1449 return NETDEV_TX_BUSY;
1450 }
1451
1452 #ifndef NETIF_F_LLTX
1453 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1454 #endif
1455
1456 if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
1457 tx_flags |= IXGB_TX_FLAGS_VLAN;
1458 vlan_id = vlan_tx_tag_get(skb);
1459 }
1460
1461 first = adapter->tx_ring.next_to_use;
1462
1463 tso = ixgb_tso(adapter, skb);
1464 if (tso < 0) {
1465 dev_kfree_skb_any(skb);
1466 #ifdef NETIF_F_LLTX
1467 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1468 #endif
1469 return NETDEV_TX_OK;
1470 }
1471
1472 if (likely(tso))
1473 tx_flags |= IXGB_TX_FLAGS_TSO;
1474 else if(ixgb_tx_csum(adapter, skb))
1475 tx_flags |= IXGB_TX_FLAGS_CSUM;
1476
1477 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1478 tx_flags);
1479
1480 netdev->trans_start = jiffies;
1481
1482 #ifdef NETIF_F_LLTX
1483 /* Make sure there is space in the ring for the next send. */
1484 if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED))
1485 netif_stop_queue(netdev);
1486
1487 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1488
1489 #endif
1490 return NETDEV_TX_OK;
1491 }
1492
1493 /**
1494 * ixgb_tx_timeout - Respond to a Tx Hang
1495 * @netdev: network interface device structure
1496 **/
1497
1498 static void
1499 ixgb_tx_timeout(struct net_device *netdev)
1500 {
1501 struct ixgb_adapter *adapter = netdev_priv(netdev);
1502
1503 /* Do the reset outside of interrupt context */
1504 schedule_work(&adapter->tx_timeout_task);
1505 }
1506
1507 static void
1508 ixgb_tx_timeout_task(struct net_device *netdev)
1509 {
1510 struct ixgb_adapter *adapter = netdev_priv(netdev);
1511
1512 adapter->tx_timeout_count++;
1513 ixgb_down(adapter, TRUE);
1514 ixgb_up(adapter);
1515 }
1516
1517 /**
1518 * ixgb_get_stats - Get System Network Statistics
1519 * @netdev: network interface device structure
1520 *
1521 * Returns the address of the device statistics structure.
1522 * The statistics are actually updated from the timer callback.
1523 **/
1524
1525 static struct net_device_stats *
1526 ixgb_get_stats(struct net_device *netdev)
1527 {
1528 struct ixgb_adapter *adapter = netdev_priv(netdev);
1529
1530 return &adapter->net_stats;
1531 }
1532
1533 /**
1534 * ixgb_change_mtu - Change the Maximum Transfer Unit
1535 * @netdev: network interface device structure
1536 * @new_mtu: new value for maximum frame size
1537 *
1538 * Returns 0 on success, negative on failure
1539 **/
1540
1541 static int
1542 ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1543 {
1544 struct ixgb_adapter *adapter = netdev_priv(netdev);
1545 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1546 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1547
1548
1549 if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1550 || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
1551 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1552 return -EINVAL;
1553 }
1554
1555 if((max_frame <= IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1556 || (max_frame <= IXGB_RXBUFFER_2048)) {
1557 adapter->rx_buffer_len = IXGB_RXBUFFER_2048;
1558
1559 } else if(max_frame <= IXGB_RXBUFFER_4096) {
1560 adapter->rx_buffer_len = IXGB_RXBUFFER_4096;
1561
1562 } else if(max_frame <= IXGB_RXBUFFER_8192) {
1563 adapter->rx_buffer_len = IXGB_RXBUFFER_8192;
1564
1565 } else {
1566 adapter->rx_buffer_len = IXGB_RXBUFFER_16384;
1567 }
1568
1569 netdev->mtu = new_mtu;
1570
1571 if(old_max_frame != max_frame && netif_running(netdev)) {
1572
1573 ixgb_down(adapter, TRUE);
1574 ixgb_up(adapter);
1575 }
1576
1577 return 0;
1578 }
1579
1580 /**
1581 * ixgb_update_stats - Update the board statistics counters.
1582 * @adapter: board private structure
1583 **/
1584
1585 void
1586 ixgb_update_stats(struct ixgb_adapter *adapter)
1587 {
1588 struct net_device *netdev = adapter->netdev;
1589
1590 if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
1591 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1592 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1593 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1594 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1595 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1596
1597 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1598 /* fix up multicast stats by removing broadcasts */
1599 if(multi >= bcast)
1600 multi -= bcast;
1601
1602 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1603 adapter->stats.mprch += (multi >> 32);
1604 adapter->stats.bprcl += bcast_l;
1605 adapter->stats.bprch += bcast_h;
1606 } else {
1607 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1608 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1609 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1610 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1611 }
1612 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1613 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1614 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1615 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1616 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1617 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1618 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1619 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1620 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1621 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1622 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1623 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1624 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1625 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1626 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1627 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1628 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1629 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1630 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1631 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1632 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1633 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1634 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1635 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1636 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1637 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1638 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1639 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1640 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1641 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1642 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1643 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1644 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1645 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1646 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1647 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1648 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1649 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1650 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1651 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1652 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1653 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1654 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1655 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1656 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1657 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1658 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1659 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1660 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1661 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1662 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1663 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1664 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1665 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1666 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1667 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1668
1669 /* Fill out the OS statistics structure */
1670
1671 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1672 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1673 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1674 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1675 adapter->net_stats.multicast = adapter->stats.mprcl;
1676 adapter->net_stats.collisions = 0;
1677
1678 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1679 * with a length in the type/len field */
1680 adapter->net_stats.rx_errors =
1681 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1682 adapter->stats.ruc +
1683 adapter->stats.roc /*+ adapter->stats.rlec */ +
1684 adapter->stats.icbc +
1685 adapter->stats.ecbc + adapter->stats.mpc;
1686
1687 /* see above
1688 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1689 */
1690
1691 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1692 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1693 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1694 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1695
1696 adapter->net_stats.tx_errors = 0;
1697 adapter->net_stats.rx_frame_errors = 0;
1698 adapter->net_stats.tx_aborted_errors = 0;
1699 adapter->net_stats.tx_carrier_errors = 0;
1700 adapter->net_stats.tx_fifo_errors = 0;
1701 adapter->net_stats.tx_heartbeat_errors = 0;
1702 adapter->net_stats.tx_window_errors = 0;
1703 }
1704
1705 #define IXGB_MAX_INTR 10
1706 /**
1707 * ixgb_intr - Interrupt Handler
1708 * @irq: interrupt number
1709 * @data: pointer to a network interface device structure
1710 * @pt_regs: CPU registers structure
1711 **/
1712
1713 static irqreturn_t
1714 ixgb_intr(int irq, void *data, struct pt_regs *regs)
1715 {
1716 struct net_device *netdev = data;
1717 struct ixgb_adapter *adapter = netdev_priv(netdev);
1718 struct ixgb_hw *hw = &adapter->hw;
1719 uint32_t icr = IXGB_READ_REG(hw, ICR);
1720 #ifndef CONFIG_IXGB_NAPI
1721 unsigned int i;
1722 #endif
1723
1724 if(unlikely(!icr))
1725 return IRQ_NONE; /* Not our interrupt */
1726
1727 if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) {
1728 mod_timer(&adapter->watchdog_timer, jiffies);
1729 }
1730
1731 #ifdef CONFIG_IXGB_NAPI
1732 if(netif_rx_schedule_prep(netdev)) {
1733
1734 /* Disable interrupts and register for poll. The flush
1735 of the posted write is intentionally left out.
1736 */
1737
1738 atomic_inc(&adapter->irq_sem);
1739 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
1740 __netif_rx_schedule(netdev);
1741 }
1742 #else
1743 /* yes, that is actually a & and it is meant to make sure that
1744 * every pass through this for loop checks both receive and
1745 * transmit queues for completed descriptors, intended to
1746 * avoid starvation issues and assist tx/rx fairness. */
1747 for(i = 0; i < IXGB_MAX_INTR; i++)
1748 if(!ixgb_clean_rx_irq(adapter) &
1749 !ixgb_clean_tx_irq(adapter))
1750 break;
1751 #endif
1752 return IRQ_HANDLED;
1753 }
1754
1755 #ifdef CONFIG_IXGB_NAPI
1756 /**
1757 * ixgb_clean - NAPI Rx polling callback
1758 * @adapter: board private structure
1759 **/
1760
1761 static int
1762 ixgb_clean(struct net_device *netdev, int *budget)
1763 {
1764 struct ixgb_adapter *adapter = netdev_priv(netdev);
1765 int work_to_do = min(*budget, netdev->quota);
1766 int tx_cleaned;
1767 int work_done = 0;
1768
1769 tx_cleaned = ixgb_clean_tx_irq(adapter);
1770 ixgb_clean_rx_irq(adapter, &work_done, work_to_do);
1771
1772 *budget -= work_done;
1773 netdev->quota -= work_done;
1774
1775 /* if no Tx and not enough Rx work done, exit the polling mode */
1776 if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
1777 netif_rx_complete(netdev);
1778 ixgb_irq_enable(adapter);
1779 return 0;
1780 }
1781
1782 return 1;
1783 }
1784 #endif
1785
1786 /**
1787 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1788 * @adapter: board private structure
1789 **/
1790
1791 static boolean_t
1792 ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1793 {
1794 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1795 struct net_device *netdev = adapter->netdev;
1796 struct ixgb_tx_desc *tx_desc, *eop_desc;
1797 struct ixgb_buffer *buffer_info;
1798 unsigned int i, eop;
1799 boolean_t cleaned = FALSE;
1800
1801 i = tx_ring->next_to_clean;
1802 eop = tx_ring->buffer_info[i].next_to_watch;
1803 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1804
1805 while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1806
1807 for(cleaned = FALSE; !cleaned; ) {
1808 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1809 buffer_info = &tx_ring->buffer_info[i];
1810
1811 if (tx_desc->popts
1812 & (IXGB_TX_DESC_POPTS_TXSM |
1813 IXGB_TX_DESC_POPTS_IXSM))
1814 adapter->hw_csum_tx_good++;
1815
1816 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1817
1818 *(uint32_t *)&(tx_desc->status) = 0;
1819
1820 cleaned = (i == eop);
1821 if(++i == tx_ring->count) i = 0;
1822 }
1823
1824 eop = tx_ring->buffer_info[i].next_to_watch;
1825 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1826 }
1827
1828 tx_ring->next_to_clean = i;
1829
1830 spin_lock(&adapter->tx_lock);
1831 if(cleaned && netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
1832 (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) {
1833
1834 netif_wake_queue(netdev);
1835 }
1836 spin_unlock(&adapter->tx_lock);
1837
1838 if(adapter->detect_tx_hung) {
1839 /* detect a transmit hang in hardware, this serializes the
1840 * check with the clearing of time_stamp and movement of i */
1841 adapter->detect_tx_hung = FALSE;
1842 if (tx_ring->buffer_info[eop].dma &&
1843 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1844 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
1845 IXGB_STATUS_TXOFF)) {
1846 /* detected Tx unit hang */
1847 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1848 " TDH <%x>\n"
1849 " TDT <%x>\n"
1850 " next_to_use <%x>\n"
1851 " next_to_clean <%x>\n"
1852 "buffer_info[next_to_clean]\n"
1853 " time_stamp <%lx>\n"
1854 " next_to_watch <%x>\n"
1855 " jiffies <%lx>\n"
1856 " next_to_watch.status <%x>\n",
1857 IXGB_READ_REG(&adapter->hw, TDH),
1858 IXGB_READ_REG(&adapter->hw, TDT),
1859 tx_ring->next_to_use,
1860 tx_ring->next_to_clean,
1861 tx_ring->buffer_info[eop].time_stamp,
1862 eop,
1863 jiffies,
1864 eop_desc->status);
1865 netif_stop_queue(netdev);
1866 }
1867 }
1868
1869 return cleaned;
1870 }
1871
1872 /**
1873 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1874 * @adapter: board private structure
1875 * @rx_desc: receive descriptor
1876 * @sk_buff: socket buffer with received data
1877 **/
1878
1879 static inline void
1880 ixgb_rx_checksum(struct ixgb_adapter *adapter,
1881 struct ixgb_rx_desc *rx_desc,
1882 struct sk_buff *skb)
1883 {
1884 /* Ignore Checksum bit is set OR
1885 * TCP Checksum has not been calculated
1886 */
1887 if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1888 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1889 skb->ip_summed = CHECKSUM_NONE;
1890 return;
1891 }
1892
1893 /* At this point we know the hardware did the TCP checksum */
1894 /* now look at the TCP checksum error bit */
1895 if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1896 /* let the stack verify checksum errors */
1897 skb->ip_summed = CHECKSUM_NONE;
1898 adapter->hw_csum_rx_error++;
1899 } else {
1900 /* TCP checksum is good */
1901 skb->ip_summed = CHECKSUM_UNNECESSARY;
1902 adapter->hw_csum_rx_good++;
1903 }
1904 }
1905
1906 /**
1907 * ixgb_clean_rx_irq - Send received data up the network stack,
1908 * @adapter: board private structure
1909 **/
1910
1911 static boolean_t
1912 #ifdef CONFIG_IXGB_NAPI
1913 ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1914 #else
1915 ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1916 #endif
1917 {
1918 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1919 struct net_device *netdev = adapter->netdev;
1920 struct pci_dev *pdev = adapter->pdev;
1921 struct ixgb_rx_desc *rx_desc, *next_rxd;
1922 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
1923 uint32_t length;
1924 unsigned int i, j;
1925 boolean_t cleaned = FALSE;
1926
1927 i = rx_ring->next_to_clean;
1928 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1929 buffer_info = &rx_ring->buffer_info[i];
1930
1931 while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
1932 struct sk_buff *skb, *next_skb;
1933 u8 status;
1934
1935 #ifdef CONFIG_IXGB_NAPI
1936 if(*work_done >= work_to_do)
1937 break;
1938
1939 (*work_done)++;
1940 #endif
1941 status = rx_desc->status;
1942 skb = buffer_info->skb;
1943
1944 prefetch(skb->data);
1945
1946 if(++i == rx_ring->count) i = 0;
1947 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1948 prefetch(next_rxd);
1949
1950 if((j = i + 1) == rx_ring->count) j = 0;
1951 next2_buffer = &rx_ring->buffer_info[j];
1952 prefetch(next2_buffer);
1953
1954 next_buffer = &rx_ring->buffer_info[i];
1955 next_skb = next_buffer->skb;
1956 prefetch(next_skb);
1957
1958 cleaned = TRUE;
1959
1960 pci_unmap_single(pdev,
1961 buffer_info->dma,
1962 buffer_info->length,
1963 PCI_DMA_FROMDEVICE);
1964
1965 length = le16_to_cpu(rx_desc->length);
1966
1967 if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1968
1969 /* All receives must fit into a single buffer */
1970
1971 IXGB_DBG("Receive packet consumed multiple buffers "
1972 "length<%x>\n", length);
1973
1974 dev_kfree_skb_irq(skb);
1975 goto rxdesc_done;
1976 }
1977
1978 if (unlikely(rx_desc->errors
1979 & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
1980 | IXGB_RX_DESC_ERRORS_P |
1981 IXGB_RX_DESC_ERRORS_RXE))) {
1982
1983 dev_kfree_skb_irq(skb);
1984 goto rxdesc_done;
1985 }
1986
1987 /* Good Receive */
1988 skb_put(skb, length);
1989
1990 /* Receive Checksum Offload */
1991 ixgb_rx_checksum(adapter, rx_desc, skb);
1992
1993 skb->protocol = eth_type_trans(skb, netdev);
1994 #ifdef CONFIG_IXGB_NAPI
1995 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1996 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
1997 le16_to_cpu(rx_desc->special) &
1998 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
1999 } else {
2000 netif_receive_skb(skb);
2001 }
2002 #else /* CONFIG_IXGB_NAPI */
2003 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2004 vlan_hwaccel_rx(skb, adapter->vlgrp,
2005 le16_to_cpu(rx_desc->special) &
2006 IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2007 } else {
2008 netif_rx(skb);
2009 }
2010 #endif /* CONFIG_IXGB_NAPI */
2011 netdev->last_rx = jiffies;
2012
2013 rxdesc_done:
2014 /* clean up descriptor, might be written over by hw */
2015 rx_desc->status = 0;
2016 buffer_info->skb = NULL;
2017
2018 /* use prefetched values */
2019 rx_desc = next_rxd;
2020 buffer_info = next_buffer;
2021 }
2022
2023 rx_ring->next_to_clean = i;
2024
2025 ixgb_alloc_rx_buffers(adapter);
2026
2027 return cleaned;
2028 }
2029
2030 /**
2031 * ixgb_alloc_rx_buffers - Replace used receive buffers
2032 * @adapter: address of board private structure
2033 **/
2034
2035 static void
2036 ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
2037 {
2038 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2039 struct net_device *netdev = adapter->netdev;
2040 struct pci_dev *pdev = adapter->pdev;
2041 struct ixgb_rx_desc *rx_desc;
2042 struct ixgb_buffer *buffer_info;
2043 struct sk_buff *skb;
2044 unsigned int i;
2045 int num_group_tail_writes;
2046 long cleancount;
2047
2048 i = rx_ring->next_to_use;
2049 buffer_info = &rx_ring->buffer_info[i];
2050 cleancount = IXGB_DESC_UNUSED(rx_ring);
2051
2052 num_group_tail_writes = IXGB_RX_BUFFER_WRITE;
2053
2054 /* leave three descriptors unused */
2055 while(--cleancount > 2) {
2056 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2057
2058 skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
2059
2060 if(unlikely(!skb)) {
2061 /* Better luck next round */
2062 break;
2063 }
2064
2065 /* Make buffer alignment 2 beyond a 16 byte boundary
2066 * this will result in a 16 byte aligned IP header after
2067 * the 14 byte MAC header is removed
2068 */
2069 skb_reserve(skb, NET_IP_ALIGN);
2070
2071 skb->dev = netdev;
2072
2073 buffer_info->skb = skb;
2074 buffer_info->length = adapter->rx_buffer_len;
2075 buffer_info->dma =
2076 pci_map_single(pdev,
2077 skb->data,
2078 adapter->rx_buffer_len,
2079 PCI_DMA_FROMDEVICE);
2080
2081 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
2082 /* guarantee DD bit not set now before h/w gets descriptor
2083 * this is the rest of the workaround for h/w double
2084 * writeback. */
2085 rx_desc->status = 0;
2086
2087 if((i & ~(num_group_tail_writes- 1)) == i) {
2088 /* Force memory writes to complete before letting h/w
2089 * know there are new descriptors to fetch. (Only
2090 * applicable for weak-ordered memory model archs,
2091 * such as IA-64). */
2092 wmb();
2093
2094 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2095 }
2096
2097 if(++i == rx_ring->count) i = 0;
2098 buffer_info = &rx_ring->buffer_info[i];
2099 }
2100
2101 rx_ring->next_to_use = i;
2102 }
2103
2104 /**
2105 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2106 *
2107 * @param netdev network interface device structure
2108 * @param grp indicates to enable or disable tagging/stripping
2109 **/
2110 static void
2111 ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2112 {
2113 struct ixgb_adapter *adapter = netdev_priv(netdev);
2114 uint32_t ctrl, rctl;
2115
2116 ixgb_irq_disable(adapter);
2117 adapter->vlgrp = grp;
2118
2119 if(grp) {
2120 /* enable VLAN tag insert/strip */
2121 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2122 ctrl |= IXGB_CTRL0_VME;
2123 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2124
2125 /* enable VLAN receive filtering */
2126
2127 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2128 rctl |= IXGB_RCTL_VFE;
2129 rctl &= ~IXGB_RCTL_CFIEN;
2130 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2131 } else {
2132 /* disable VLAN tag insert/strip */
2133
2134 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2135 ctrl &= ~IXGB_CTRL0_VME;
2136 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2137
2138 /* disable VLAN filtering */
2139
2140 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2141 rctl &= ~IXGB_RCTL_VFE;
2142 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2143 }
2144
2145 ixgb_irq_enable(adapter);
2146 }
2147
2148 static void
2149 ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
2150 {
2151 struct ixgb_adapter *adapter = netdev_priv(netdev);
2152 uint32_t vfta, index;
2153
2154 /* add VID to filter table */
2155
2156 index = (vid >> 5) & 0x7F;
2157 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2158 vfta |= (1 << (vid & 0x1F));
2159 ixgb_write_vfta(&adapter->hw, index, vfta);
2160 }
2161
2162 static void
2163 ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
2164 {
2165 struct ixgb_adapter *adapter = netdev_priv(netdev);
2166 uint32_t vfta, index;
2167
2168 ixgb_irq_disable(adapter);
2169
2170 if(adapter->vlgrp)
2171 adapter->vlgrp->vlan_devices[vid] = NULL;
2172
2173 ixgb_irq_enable(adapter);
2174
2175 /* remove VID from filter table*/
2176
2177 index = (vid >> 5) & 0x7F;
2178 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2179 vfta &= ~(1 << (vid & 0x1F));
2180 ixgb_write_vfta(&adapter->hw, index, vfta);
2181 }
2182
2183 static void
2184 ixgb_restore_vlan(struct ixgb_adapter *adapter)
2185 {
2186 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2187
2188 if(adapter->vlgrp) {
2189 uint16_t vid;
2190 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2191 if(!adapter->vlgrp->vlan_devices[vid])
2192 continue;
2193 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2194 }
2195 }
2196 }
2197
2198 #ifdef CONFIG_NET_POLL_CONTROLLER
2199 /*
2200 * Polling 'interrupt' - used by things like netconsole to send skbs
2201 * without having to re-enable interrupts. It's not called while
2202 * the interrupt routine is executing.
2203 */
2204
2205 static void ixgb_netpoll(struct net_device *dev)
2206 {
2207 struct ixgb_adapter *adapter = dev->priv;
2208
2209 disable_irq(adapter->pdev->irq);
2210 ixgb_intr(adapter->pdev->irq, dev, NULL);
2211 enable_irq(adapter->pdev->irq);
2212 }
2213 #endif
2214
2215 /* ixgb_main.c */
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