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[net-next-2.6.git] / drivers / net / ixgb / ixgb_main.c
CommitLineData
1da177e4
LT		 1/*******************************************************************************
2
0abb6eb1
AK		 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
1da177e4 13 more details.
0abb6eb1 14
1da177e4 15 You should have received a copy of the GNU General Public License along with
0abb6eb1
AK		 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
1da177e4
LT		 22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
0abb6eb1 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
1da177e4
LT		 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
29#include "ixgb.h"
30
1da177e4 31char ixgb_driver_name[] = "ixgb";
e9ab1d14 32static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
1da177e4
LT		 33
34#ifndef CONFIG_IXGB_NAPI
35#define DRIVERNAPI
36#else
37#define DRIVERNAPI "-NAPI"
38#endif
8b32e63d 39#define DRV_VERSION "1.0.126-k4"DRIVERNAPI
273dc74e
SH		 40const char ixgb_driver_version[] = DRV_VERSION;
41static const char ixgb_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
1da177e4 42
d9fed18b
JB		 43#define IXGB_CB_LENGTH 256
44static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
45module_param(copybreak, uint, 0644);
46MODULE_PARM_DESC(copybreak,
47 "Maximum size of packet that is copied to a new buffer on receive");
48
1da177e4
LT		 49/* ixgb_pci_tbl - PCI Device ID Table
50 *
51 * Wildcard entries (PCI_ANY_ID) should come last
52 * Last entry must be all 0s
53 *
54 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
55 * Class, Class Mask, private data (not used) }
56 */
57static struct pci_device_id ixgb_pci_tbl[] = {
58 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
59 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
940829e2
AK		 60 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
61 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1da177e4
LT		 62 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
63 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
7490d71a 64 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
1da177e4
LT		 65 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
66
67 /* required last entry */
68 {0,}
69};
70
71MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
72
73/* Local Function Prototypes */
1da177e4
LT		 74static int ixgb_init_module(void);
75static void ixgb_exit_module(void);
76static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
77static void __devexit ixgb_remove(struct pci_dev *pdev);
78static int ixgb_sw_init(struct ixgb_adapter *adapter);
79static int ixgb_open(struct net_device *netdev);
80static int ixgb_close(struct net_device *netdev);
81static void ixgb_configure_tx(struct ixgb_adapter *adapter);
82static void ixgb_configure_rx(struct ixgb_adapter *adapter);
83static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
84static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
85static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
86static void ixgb_set_multi(struct net_device *netdev);
87static void ixgb_watchdog(unsigned long data);
88static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
89static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
90static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
91static int ixgb_set_mac(struct net_device *netdev, void *p);
7d12e780 92static irqreturn_t ixgb_intr(int irq, void *data);
446490ca 93static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
ac79c82e 94
1da177e4 95#ifdef CONFIG_IXGB_NAPI
7490d71a
JB		 96static int ixgb_clean(struct napi_struct *, int);
97static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
1da177e4 98#else
7490d71a 99static bool ixgb_clean_rx_irq(struct ixgb_adapter *);
1da177e4 100#endif
7490d71a
JB		 101static void ixgb_alloc_rx_buffers(struct ixgb_adapter *);
102
1da177e4 103static void ixgb_tx_timeout(struct net_device *dev);
c4028958 104static void ixgb_tx_timeout_task(struct work_struct *work);
7490d71a 105
1da177e4 106static void ixgb_vlan_rx_register(struct net_device *netdev,
7490d71a 107 struct vlan_group *grp);
222441a6
JP		 108static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
109static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
1da177e4
LT		 110static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
111
1da177e4
LT		 112#ifdef CONFIG_NET_POLL_CONTROLLER
113/* for netdump / net console */
114static void ixgb_netpoll(struct net_device *dev);
115#endif
116
01748fbb 117static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
7490d71a 118 enum pci_channel_state state);
01748fbb
LV		 119static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
120static void ixgb_io_resume (struct pci_dev *pdev);
1da177e4 121
01748fbb
LV		 122static struct pci_error_handlers ixgb_err_handler = {
123 .error_detected = ixgb_io_error_detected,
124 .slot_reset = ixgb_io_slot_reset,
125 .resume = ixgb_io_resume,
126};
127
1da177e4 128static struct pci_driver ixgb_driver = {
c2eba932 129 .name = ixgb_driver_name,
1da177e4 130 .id_table = ixgb_pci_tbl,
c2eba932
MC		 131 .probe = ixgb_probe,
132 .remove = __devexit_p(ixgb_remove),
01748fbb 133 .err_handler = &ixgb_err_handler
1da177e4
LT		 134};
135
136MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
137MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
138MODULE_LICENSE("GPL");
01e5abc2 139MODULE_VERSION(DRV_VERSION);
1da177e4 140
ec9c3f5d
AK		 141#define DEFAULT_DEBUG_LEVEL_SHIFT 3
142static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
143module_param(debug, int, 0);
144MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
145
1da177e4
LT		 146/**
147 * ixgb_init_module - Driver Registration Routine
148 *
149 * ixgb_init_module is the first routine called when the driver is
150 * loaded. All it does is register with the PCI subsystem.
151 **/
152
153static int __init
154ixgb_init_module(void)
155{
1da177e4
LT		 156 printk(KERN_INFO "%s - version %s\n",
157 ixgb_driver_string, ixgb_driver_version);
158
159 printk(KERN_INFO "%s\n", ixgb_copyright);
160
29917620 161 return pci_register_driver(&ixgb_driver);
1da177e4
LT		 162}
163
164module_init(ixgb_init_module);
165
166/**
167 * ixgb_exit_module - Driver Exit Cleanup Routine
168 *
169 * ixgb_exit_module is called just before the driver is removed
170 * from memory.
171 **/
172
173static void __exit
174ixgb_exit_module(void)
175{
1da177e4
LT		 176 pci_unregister_driver(&ixgb_driver);
177}
178
179module_exit(ixgb_exit_module);
180
181/**
182 * ixgb_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
184 **/
185
235949d1 186static void
1da177e4
LT		 187ixgb_irq_disable(struct ixgb_adapter *adapter)
188{
1da177e4
LT		 189 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
190 IXGB_WRITE_FLUSH(&adapter->hw);
191 synchronize_irq(adapter->pdev->irq);
192}
193
194/**
195 * ixgb_irq_enable - Enable default interrupt generation settings
196 * @adapter: board private structure
197 **/
198
235949d1 199static void
1da177e4
LT		 200ixgb_irq_enable(struct ixgb_adapter *adapter)
201{
9c61a9dc
JB		 202 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
203 IXGB_INT_TXDW | IXGB_INT_LSC;
204 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
205 val |= IXGB_INT_GPI0;
206 IXGB_WRITE_REG(&adapter->hw, IMS, val);
207 IXGB_WRITE_FLUSH(&adapter->hw);
1da177e4
LT		 208}
209
210int
211ixgb_up(struct ixgb_adapter *adapter)
212{
213 struct net_device *netdev = adapter->netdev;
fb136c07 214 int err, irq_flags = IRQF_SHARED;
1da177e4
LT		 215 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
216 struct ixgb_hw *hw = &adapter->hw;
217
218 /* hardware has been reset, we need to reload some things */
219
8556f0d1 220 ixgb_rar_set(hw, netdev->dev_addr, 0);
1da177e4
LT		 221 ixgb_set_multi(netdev);
222
223 ixgb_restore_vlan(adapter);
224
225 ixgb_configure_tx(adapter);
226 ixgb_setup_rctl(adapter);
227 ixgb_configure_rx(adapter);
228 ixgb_alloc_rx_buffers(adapter);
229
e59d1696
AK		 230 /* disable interrupts and get the hardware into a known state */
231 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
232
fb136c07
AK		 233 /* only enable MSI if bus is in PCI-X mode */
234 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
235 err = pci_enable_msi(adapter->pdev);
236 if (!err) {
237 adapter->have_msi = 1;
238 irq_flags = 0;
239 }
1da177e4
LT		 240 /* proceed to try to request regular interrupt */
241 }
1da177e4 242
fb136c07
AK		 243 err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
244 netdev->name, netdev);
245 if (err) {
246 if (adapter->have_msi)
247 pci_disable_msi(adapter->pdev);
ec9c3f5d
AK		 248 DPRINTK(PROBE, ERR,
249 "Unable to allocate interrupt Error: %d\n", err);
1da177e4 250 return err;
ec9c3f5d 251 }
1da177e4 252
03f83041 253 if ((hw->max_frame_size != max_frame) ||
1da177e4
LT		 254 (hw->max_frame_size !=
255 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
256
257 hw->max_frame_size = max_frame;
258
259 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
260
03f83041 261 if (hw->max_frame_size >
1da177e4 262 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
222441a6 263 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
1da177e4 264
03f83041 265 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
1da177e4
LT		 266 ctrl0 |= IXGB_CTRL0_JFE;
267 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
268 }
269 }
270 }
271
bab2bce7 272 clear_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 273
274#ifdef CONFIG_IXGB_NAPI
bea3348e 275 napi_enable(&adapter->napi);
1da177e4 276#endif
e59d1696
AK		 277 ixgb_irq_enable(adapter);
278
bab2bce7
JB		 279 mod_timer(&adapter->watchdog_timer, jiffies);
280
1da177e4
LT		 281 return 0;
282}
283
284void
446490ca 285ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
1da177e4
LT		 286{
287 struct net_device *netdev = adapter->netdev;
288
bab2bce7
JB		 289 /* prevent the interrupt handler from restarting watchdog */
290 set_bit(__IXGB_DOWN, &adapter->flags);
291
49d85c50
DM		 292#ifdef CONFIG_IXGB_NAPI
293 napi_disable(&adapter->napi);
49d85c50 294#endif
bab2bce7 295 /* waiting for NAPI to complete can re-enable interrupts */
1da177e4
LT		 296 ixgb_irq_disable(adapter);
297 free_irq(adapter->pdev->irq, netdev);
fb136c07
AK		 298
299 if (adapter->have_msi)
1da177e4
LT		 300 pci_disable_msi(adapter->pdev);
301
03f83041 302 if (kill_watchdog)
1da177e4 303 del_timer_sync(&adapter->watchdog_timer);
49d85c50 304
1da177e4
LT		 305 adapter->link_speed = 0;
306 adapter->link_duplex = 0;
307 netif_carrier_off(netdev);
308 netif_stop_queue(netdev);
309
310 ixgb_reset(adapter);
311 ixgb_clean_tx_ring(adapter);
312 ixgb_clean_rx_ring(adapter);
313}
314
315void
316ixgb_reset(struct ixgb_adapter *adapter)
317{
3fd7131f 318 struct ixgb_hw *hw = &adapter->hw;
1da177e4 319
3fd7131f
MW		 320 ixgb_adapter_stop(hw);
321 if (!ixgb_init_hw(hw))
ec9c3f5d 322 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
3fd7131f
MW		 323
324 /* restore frame size information */
325 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
326 if (hw->max_frame_size >
327 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
328 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
329 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
330 ctrl0 |= IXGB_CTRL0_JFE;
331 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
332 }
333 }
1da177e4
LT		 334}
335
336/**
337 * ixgb_probe - Device Initialization Routine
338 * @pdev: PCI device information struct
339 * @ent: entry in ixgb_pci_tbl
340 *
341 * Returns 0 on success, negative on failure
342 *
343 * ixgb_probe initializes an adapter identified by a pci_dev structure.
344 * The OS initialization, configuring of the adapter private structure,
345 * and a hardware reset occur.
346 **/
347
348static int __devinit
349ixgb_probe(struct pci_dev *pdev,
350 const struct pci_device_id *ent)
351{
352 struct net_device *netdev = NULL;
353 struct ixgb_adapter *adapter;
354 static int cards_found = 0;
1da177e4
LT		 355 int pci_using_dac;
356 int i;
357 int err;
358
03f83041 359 if ((err = pci_enable_device(pdev)))
1da177e4
LT		 360 return err;
361
03f83041 362 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
c91e468a 363 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
1da177e4
LT		 364 pci_using_dac = 1;
365 } else {
03f83041 366 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
c91e468a 367 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
ec9c3f5d
AK		 368 printk(KERN_ERR
369 "ixgb: No usable DMA configuration, aborting\n");
c91e468a 370 goto err_dma_mask;
1da177e4
LT		 371 }
372 pci_using_dac = 0;
373 }
374
03f83041 375 if ((err = pci_request_regions(pdev, ixgb_driver_name)))
c91e468a 376 goto err_request_regions;
1da177e4
LT		 377
378 pci_set_master(pdev);
379
380 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
03f83041 381 if (!netdev) {
1da177e4
LT		 382 err = -ENOMEM;
383 goto err_alloc_etherdev;
384 }
385
1da177e4
LT		 386 SET_NETDEV_DEV(netdev, &pdev->dev);
387
388 pci_set_drvdata(pdev, netdev);
8908c6cd 389 adapter = netdev_priv(netdev);
1da177e4
LT		 390 adapter->netdev = netdev;
391 adapter->pdev = pdev;
392 adapter->hw.back = adapter;
ec9c3f5d 393 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
1da177e4 394
e539e466
JB		 395 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, BAR_0),
396 pci_resource_len(pdev, BAR_0));
397 if (!adapter->hw.hw_addr) {
1da177e4
LT		 398 err = -EIO;
399 goto err_ioremap;
400 }
401
402 for(i = BAR_1; i <= BAR_5; i++) {
03f83041 403 if (pci_resource_len(pdev, i) == 0)
1da177e4 404 continue;
03f83041 405 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 406 adapter->hw.io_base = pci_resource_start(pdev, i);
407 break;
408 }
409 }
410
411 netdev->open = &ixgb_open;
412 netdev->stop = &ixgb_close;
413 netdev->hard_start_xmit = &ixgb_xmit_frame;
414 netdev->get_stats = &ixgb_get_stats;
415 netdev->set_multicast_list = &ixgb_set_multi;
416 netdev->set_mac_address = &ixgb_set_mac;
417 netdev->change_mtu = &ixgb_change_mtu;
418 ixgb_set_ethtool_ops(netdev);
419 netdev->tx_timeout = &ixgb_tx_timeout;
9b8118df 420 netdev->watchdog_timeo = 5 * HZ;
1da177e4 421#ifdef CONFIG_IXGB_NAPI
bea3348e 422 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4
LT		 423#endif
424 netdev->vlan_rx_register = ixgb_vlan_rx_register;
425 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
426 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
427#ifdef CONFIG_NET_POLL_CONTROLLER
428 netdev->poll_controller = ixgb_netpoll;
429#endif
430
0eb5a34c 431 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 432
433 adapter->bd_number = cards_found;
434 adapter->link_speed = 0;
435 adapter->link_duplex = 0;
436
437 /* setup the private structure */
438
03f83041 439 if ((err = ixgb_sw_init(adapter)))
1da177e4
LT		 440 goto err_sw_init;
441
442 netdev->features = NETIF_F_SG |
443 NETIF_F_HW_CSUM |
444 NETIF_F_HW_VLAN_TX |
445 NETIF_F_HW_VLAN_RX |
446 NETIF_F_HW_VLAN_FILTER;
1da177e4 447 netdev->features |= NETIF_F_TSO;
1da177e4 448
03f83041 449 if (pci_using_dac)
1da177e4
LT		 450 netdev->features |= NETIF_F_HIGHDMA;
451
452 /* make sure the EEPROM is good */
453
03f83041 454 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
ec9c3f5d 455 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 456 err = -EIO;
457 goto err_eeprom;
458 }
459
460 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
df859c51 461 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1da177e4 462
03f83041 463 if (!is_valid_ether_addr(netdev->perm_addr)) {
ec9c3f5d 464 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1da177e4
LT		 465 err = -EIO;
466 goto err_eeprom;
467 }
468
469 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
470
471 init_timer(&adapter->watchdog_timer);
472 adapter->watchdog_timer.function = &ixgb_watchdog;
473 adapter->watchdog_timer.data = (unsigned long)adapter;
474
c4028958 475 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 476
ec9c3f5d 477 strcpy(netdev->name, "eth%d");
03f83041 478 if ((err = register_netdev(netdev)))
1da177e4
LT		 479 goto err_register;
480
481 /* we're going to reset, so assume we have no link for now */
482
483 netif_carrier_off(netdev);
484 netif_stop_queue(netdev);
485
ec9c3f5d 486 DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
1da177e4
LT		 487 ixgb_check_options(adapter);
488 /* reset the hardware with the new settings */
489
490 ixgb_reset(adapter);
491
492 cards_found++;
493 return 0;
494
495err_register:
496err_sw_init:
497err_eeprom:
498 iounmap(adapter->hw.hw_addr);
499err_ioremap:
500 free_netdev(netdev);
501err_alloc_etherdev:
502 pci_release_regions(pdev);
c91e468a
AS		 503err_request_regions:
504err_dma_mask:
505 pci_disable_device(pdev);
1da177e4
LT		 506 return err;
507}
508
509/**
510 * ixgb_remove - Device Removal Routine
511 * @pdev: PCI device information struct
512 *
513 * ixgb_remove is called by the PCI subsystem to alert the driver
514 * that it should release a PCI device. The could be caused by a
515 * Hot-Plug event, or because the driver is going to be removed from
516 * memory.
517 **/
518
519static void __devexit
520ixgb_remove(struct pci_dev *pdev)
521{
522 struct net_device *netdev = pci_get_drvdata(pdev);
8908c6cd 523 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 524
12579697
JB		 525 flush_scheduled_work();
526
1da177e4
LT		 527 unregister_netdev(netdev);
528
529 iounmap(adapter->hw.hw_addr);
530 pci_release_regions(pdev);
531
532 free_netdev(netdev);
533}
534
535/**
536 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
537 * @adapter: board private structure to initialize
538 *
539 * ixgb_sw_init initializes the Adapter private data structure.
540 * Fields are initialized based on PCI device information and
541 * OS network device settings (MTU size).
542 **/
543
544static int __devinit
545ixgb_sw_init(struct ixgb_adapter *adapter)
546{
547 struct ixgb_hw *hw = &adapter->hw;
548 struct net_device *netdev = adapter->netdev;
549 struct pci_dev *pdev = adapter->pdev;
550
551 /* PCI config space info */
552
553 hw->vendor_id = pdev->vendor;
554 hw->device_id = pdev->device;
555 hw->subsystem_vendor_id = pdev->subsystem_vendor;
556 hw->subsystem_id = pdev->subsystem_device;
557
1da177e4 558 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
a3dc3da0 559 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
1da177e4 560
03f83041 561 if ((hw->device_id == IXGB_DEVICE_ID_82597EX)
940829e2
AK		 562 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
563 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
564 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
1da177e4
LT		 565 hw->mac_type = ixgb_82597;
566 else {
567 /* should never have loaded on this device */
ec9c3f5d 568 DPRINTK(PROBE, ERR, "unsupported device id\n");
1da177e4
LT		 569 }
570
571 /* enable flow control to be programmed */
572 hw->fc.send_xon = 1;
573
bab2bce7 574 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 575 return 0;
576}
577
578/**
579 * ixgb_open - Called when a network interface is made active
580 * @netdev: network interface device structure
581 *
582 * Returns 0 on success, negative value on failure
583 *
584 * The open entry point is called when a network interface is made
585 * active by the system (IFF_UP). At this point all resources needed
586 * for transmit and receive operations are allocated, the interrupt
587 * handler is registered with the OS, the watchdog timer is started,
588 * and the stack is notified that the interface is ready.
589 **/
590
591static int
592ixgb_open(struct net_device *netdev)
593{
8908c6cd 594 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 595 int err;
596
597 /* allocate transmit descriptors */
598
03f83041 599 if ((err = ixgb_setup_tx_resources(adapter)))
1da177e4
LT		 600 goto err_setup_tx;
601
602 /* allocate receive descriptors */
603
03f83041 604 if ((err = ixgb_setup_rx_resources(adapter)))
1da177e4
LT		 605 goto err_setup_rx;
606
03f83041 607 if ((err = ixgb_up(adapter)))
1da177e4
LT		 608 goto err_up;
609
610 return 0;
611
612err_up:
613 ixgb_free_rx_resources(adapter);
614err_setup_rx:
615 ixgb_free_tx_resources(adapter);
616err_setup_tx:
617 ixgb_reset(adapter);
618
619 return err;
620}
621
622/**
623 * ixgb_close - Disables a network interface
624 * @netdev: network interface device structure
625 *
626 * Returns 0, this is not allowed to fail
627 *
628 * The close entry point is called when an interface is de-activated
629 * by the OS. The hardware is still under the drivers control, but
630 * needs to be disabled. A global MAC reset is issued to stop the
631 * hardware, and all transmit and receive resources are freed.
632 **/
633
634static int
635ixgb_close(struct net_device *netdev)
636{
8908c6cd 637 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 638
446490ca 639 ixgb_down(adapter, true);
1da177e4
LT		 640
641 ixgb_free_tx_resources(adapter);
642 ixgb_free_rx_resources(adapter);
643
644 return 0;
645}
646
647/**
648 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
649 * @adapter: board private structure
650 *
651 * Return 0 on success, negative on failure
652 **/
653
654int
655ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
656{
657 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
658 struct pci_dev *pdev = adapter->pdev;
659 int size;
660
661 size = sizeof(struct ixgb_buffer) * txdr->count;
662 txdr->buffer_info = vmalloc(size);
03f83041 663 if (!txdr->buffer_info) {
ec9c3f5d
AK		 664 DPRINTK(PROBE, ERR,
665 "Unable to allocate transmit descriptor ring memory\n");
1da177e4
LT		 666 return -ENOMEM;
667 }
668 memset(txdr->buffer_info, 0, size);
669
670 /* round up to nearest 4K */
671
672 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 673 txdr->size = ALIGN(txdr->size, 4096);
1da177e4
LT		 674
675 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
03f83041 676 if (!txdr->desc) {
1da177e4 677 vfree(txdr->buffer_info);
ec9c3f5d
AK		 678 DPRINTK(PROBE, ERR,
679 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 680 return -ENOMEM;
681 }
682 memset(txdr->desc, 0, txdr->size);
683
684 txdr->next_to_use = 0;
685 txdr->next_to_clean = 0;
686
687 return 0;
688}
689
690/**
691 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
692 * @adapter: board private structure
693 *
694 * Configure the Tx unit of the MAC after a reset.
695 **/
696
697static void
698ixgb_configure_tx(struct ixgb_adapter *adapter)
699{
222441a6
JP		 700 u64 tdba = adapter->tx_ring.dma;
701 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
702 u32 tctl;
1da177e4
LT		 703 struct ixgb_hw *hw = &adapter->hw;
704
705 /* Setup the Base and Length of the Tx Descriptor Ring
706 * tx_ring.dma can be either a 32 or 64 bit value
707 */
708
709 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
710 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
711
712 IXGB_WRITE_REG(hw, TDLEN, tdlen);
713
714 /* Setup the HW Tx Head and Tail descriptor pointers */
715
716 IXGB_WRITE_REG(hw, TDH, 0);
717 IXGB_WRITE_REG(hw, TDT, 0);
718
719 /* don't set up txdctl, it induces performance problems if configured
720 * incorrectly */
721 /* Set the Tx Interrupt Delay register */
722
723 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
724
725 /* Program the Transmit Control Register */
726
727 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
728 IXGB_WRITE_REG(hw, TCTL, tctl);
729
730 /* Setup Transmit Descriptor Settings for this adapter */
731 adapter->tx_cmd_type =
732 IXGB_TX_DESC_TYPE
733 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
734}
735
736/**
737 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
738 * @adapter: board private structure
739 *
740 * Returns 0 on success, negative on failure
741 **/
742
743int
744ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
745{
746 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
747 struct pci_dev *pdev = adapter->pdev;
748 int size;
749
750 size = sizeof(struct ixgb_buffer) * rxdr->count;
751 rxdr->buffer_info = vmalloc(size);
03f83041 752 if (!rxdr->buffer_info) {
ec9c3f5d
AK		 753 DPRINTK(PROBE, ERR,
754 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 755 return -ENOMEM;
756 }
757 memset(rxdr->buffer_info, 0, size);
758
759 /* Round up to nearest 4K */
760
761 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 762 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4
LT		 763
764 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
765
03f83041 766 if (!rxdr->desc) {
1da177e4 767 vfree(rxdr->buffer_info);
ec9c3f5d
AK		 768 DPRINTK(PROBE, ERR,
769 "Unable to allocate receive descriptors\n");
1da177e4
LT		 770 return -ENOMEM;
771 }
772 memset(rxdr->desc, 0, rxdr->size);
773
774 rxdr->next_to_clean = 0;
775 rxdr->next_to_use = 0;
776
777 return 0;
778}
779
780/**
781 * ixgb_setup_rctl - configure the receive control register
782 * @adapter: Board private structure
783 **/
784
785static void
786ixgb_setup_rctl(struct ixgb_adapter *adapter)
787{
222441a6 788 u32 rctl;
1da177e4
LT		 789
790 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
791
792 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
793
794 rctl |=
795 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
796 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
797 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
798
799 rctl |= IXGB_RCTL_SECRC;
800
3f3dc0dd 801 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 802 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 803 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 804 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 805 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 806 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 807 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 808 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 809
810 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
811}
812
813/**
814 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
815 * @adapter: board private structure
816 *
817 * Configure the Rx unit of the MAC after a reset.
818 **/
819
820static void
821ixgb_configure_rx(struct ixgb_adapter *adapter)
822{
222441a6
JP		 823 u64 rdba = adapter->rx_ring.dma;
824 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 825 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 826 u32 rctl;
827 u32 rxcsum;
1da177e4
LT		 828
829 /* make sure receives are disabled while setting up the descriptors */
830
831 rctl = IXGB_READ_REG(hw, RCTL);
832 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
833
834 /* set the Receive Delay Timer Register */
835
836 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
837
838 /* Setup the Base and Length of the Rx Descriptor Ring */
839
840 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
841 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
842
843 IXGB_WRITE_REG(hw, RDLEN, rdlen);
844
845 /* Setup the HW Rx Head and Tail Descriptor Pointers */
846 IXGB_WRITE_REG(hw, RDH, 0);
847 IXGB_WRITE_REG(hw, RDT, 0);
848
4360386f
JB		 849 /* due to the hardware errata with RXDCTL, we are unable to use any of
850 * the performance enhancing features of it without causing other
851 * subtle bugs, some of the bugs could include receive length
852 * corruption at high data rates (WTHRESH > 0) and/or receive
853 * descriptor ring irregularites (particularly in hardware cache) */
854 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 855
856 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 857 if (adapter->rx_csum) {
1da177e4
LT		 858 rxcsum = IXGB_READ_REG(hw, RXCSUM);
859 rxcsum |= IXGB_RXCSUM_TUOFL;
860 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
861 }
862
863 /* Enable Receives */
864
865 IXGB_WRITE_REG(hw, RCTL, rctl);
866}
867
868/**
869 * ixgb_free_tx_resources - Free Tx Resources
870 * @adapter: board private structure
871 *
872 * Free all transmit software resources
873 **/
874
875void
876ixgb_free_tx_resources(struct ixgb_adapter *adapter)
877{
878 struct pci_dev *pdev = adapter->pdev;
879
880 ixgb_clean_tx_ring(adapter);
881
882 vfree(adapter->tx_ring.buffer_info);
883 adapter->tx_ring.buffer_info = NULL;
884
885 pci_free_consistent(pdev, adapter->tx_ring.size,
886 adapter->tx_ring.desc, adapter->tx_ring.dma);
887
888 adapter->tx_ring.desc = NULL;
889}
890
235949d1 891static void
1da177e4
LT		 892ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
893 struct ixgb_buffer *buffer_info)
894{
895 struct pci_dev *pdev = adapter->pdev;
1dfdd7df
AK		 896
897 if (buffer_info->dma)
898 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
899 PCI_DMA_TODEVICE);
900
901 if (buffer_info->skb)
1da177e4 902 dev_kfree_skb_any(buffer_info->skb);
1dfdd7df
AK		 903
904 buffer_info->skb = NULL;
905 buffer_info->dma = 0;
906 buffer_info->time_stamp = 0;
907 /* these fields must always be initialized in tx
908 * buffer_info->length = 0;
909 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 910}
911
912/**
913 * ixgb_clean_tx_ring - Free Tx Buffers
914 * @adapter: board private structure
915 **/
916
917static void
918ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
919{
920 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
921 struct ixgb_buffer *buffer_info;
922 unsigned long size;
923 unsigned int i;
924
925 /* Free all the Tx ring sk_buffs */
926
927 for(i = 0; i < tx_ring->count; i++) {
928 buffer_info = &tx_ring->buffer_info[i];
929 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
930 }
931
932 size = sizeof(struct ixgb_buffer) * tx_ring->count;
933 memset(tx_ring->buffer_info, 0, size);
934
935 /* Zero out the descriptor ring */
936
937 memset(tx_ring->desc, 0, tx_ring->size);
938
939 tx_ring->next_to_use = 0;
940 tx_ring->next_to_clean = 0;
941
942 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
943 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
944}
945
946/**
947 * ixgb_free_rx_resources - Free Rx Resources
948 * @adapter: board private structure
949 *
950 * Free all receive software resources
951 **/
952
953void
954ixgb_free_rx_resources(struct ixgb_adapter *adapter)
955{
956 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
957 struct pci_dev *pdev = adapter->pdev;
958
959 ixgb_clean_rx_ring(adapter);
960
961 vfree(rx_ring->buffer_info);
962 rx_ring->buffer_info = NULL;
963
964 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
965
966 rx_ring->desc = NULL;
967}
968
969/**
970 * ixgb_clean_rx_ring - Free Rx Buffers
971 * @adapter: board private structure
972 **/
973
974static void
975ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
976{
977 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
978 struct ixgb_buffer *buffer_info;
979 struct pci_dev *pdev = adapter->pdev;
980 unsigned long size;
981 unsigned int i;
982
983 /* Free all the Rx ring sk_buffs */
984
985 for(i = 0; i < rx_ring->count; i++) {
986 buffer_info = &rx_ring->buffer_info[i];
03f83041 987 if (buffer_info->skb) {
1da177e4
LT		 988
989 pci_unmap_single(pdev,
990 buffer_info->dma,
991 buffer_info->length,
992 PCI_DMA_FROMDEVICE);
993
994 dev_kfree_skb(buffer_info->skb);
995
996 buffer_info->skb = NULL;
997 }
998 }
999
1000 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1001 memset(rx_ring->buffer_info, 0, size);
1002
1003 /* Zero out the descriptor ring */
1004
1005 memset(rx_ring->desc, 0, rx_ring->size);
1006
1007 rx_ring->next_to_clean = 0;
1008 rx_ring->next_to_use = 0;
1009
1010 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1011 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1012}
1013
1014/**
1015 * ixgb_set_mac - Change the Ethernet Address of the NIC
1016 * @netdev: network interface device structure
1017 * @p: pointer to an address structure
1018 *
1019 * Returns 0 on success, negative on failure
1020 **/
1021
1022static int
1023ixgb_set_mac(struct net_device *netdev, void *p)
1024{
8908c6cd 1025 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1026 struct sockaddr *addr = p;
1027
03f83041 1028 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1029 return -EADDRNOTAVAIL;
1030
1031 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1032
1033 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1034
1035 return 0;
1036}
1037
1038/**
1039 * ixgb_set_multi - Multicast and Promiscuous mode set
1040 * @netdev: network interface device structure
1041 *
1042 * The set_multi entry point is called whenever the multicast address
1043 * list or the network interface flags are updated. This routine is
1044 * responsible for configuring the hardware for proper multicast,
1045 * promiscuous mode, and all-multi behavior.
1046 **/
1047
1048static void
1049ixgb_set_multi(struct net_device *netdev)
1050{
8908c6cd 1051 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1052 struct ixgb_hw *hw = &adapter->hw;
1053 struct dev_mc_list *mc_ptr;
222441a6 1054 u32 rctl;
1da177e4
LT		 1055 int i;
1056
1057 /* Check for Promiscuous and All Multicast modes */
1058
1059 rctl = IXGB_READ_REG(hw, RCTL);
1060
03f83041 1061 if (netdev->flags & IFF_PROMISC) {
1da177e4 1062 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
03f83041 1063 } else if (netdev->flags & IFF_ALLMULTI) {
1da177e4
LT		 1064 rctl |= IXGB_RCTL_MPE;
1065 rctl &= ~IXGB_RCTL_UPE;
1066 } else {
1067 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1068 }
1069
03f83041 1070 if (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1071 rctl |= IXGB_RCTL_MPE;
1072 IXGB_WRITE_REG(hw, RCTL, rctl);
1073 } else {
222441a6 1074 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1075 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1076
1077 IXGB_WRITE_REG(hw, RCTL, rctl);
1078
1079 for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
1080 i++, mc_ptr = mc_ptr->next)
1081 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
1082 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1083
1084 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1085 }
1086}
1087
1088/**
1089 * ixgb_watchdog - Timer Call-back
1090 * @data: pointer to netdev cast into an unsigned long
1091 **/
1092
1093static void
1094ixgb_watchdog(unsigned long data)
1095{
1096 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1097 struct net_device *netdev = adapter->netdev;
1098 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1099
1100 ixgb_check_for_link(&adapter->hw);
1101
1102 if (ixgb_check_for_bad_link(&adapter->hw)) {
1103 /* force the reset path */
1104 netif_stop_queue(netdev);
1105 }
1106
03f83041
JB		 1107 if (adapter->hw.link_up) {
1108 if (!netif_carrier_ok(netdev)) {
ec9c3f5d
AK		 1109 DPRINTK(LINK, INFO,
1110 "NIC Link is Up 10000 Mbps Full Duplex\n");
1da177e4
LT		 1111 adapter->link_speed = 10000;
1112 adapter->link_duplex = FULL_DUPLEX;
1113 netif_carrier_on(netdev);
1114 netif_wake_queue(netdev);
1115 }
1116 } else {
03f83041 1117 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1118 adapter->link_speed = 0;
1119 adapter->link_duplex = 0;
ec9c3f5d 1120 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1da177e4
LT		 1121 netif_carrier_off(netdev);
1122 netif_stop_queue(netdev);
1123
1124 }
1125 }
1126
1127 ixgb_update_stats(adapter);
1128
03f83041
JB		 1129 if (!netif_carrier_ok(netdev)) {
1130 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1131 /* We've lost link, so the controller stops DMA,
1132 * but we've got queued Tx work that's never going
1133 * to get done, so reset controller to flush Tx.
1134 * (Do the reset outside of interrupt context). */
1135 schedule_work(&adapter->tx_timeout_task);
1136 }
1137 }
1138
1139 /* Force detection of hung controller every watchdog period */
446490ca 1140 adapter->detect_tx_hung = true;
1da177e4
LT		 1141
1142 /* generate an interrupt to force clean up of any stragglers */
1143 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1144
1145 /* Reset the timer */
1146 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1147}
1148
1149#define IXGB_TX_FLAGS_CSUM 0x00000001
1150#define IXGB_TX_FLAGS_VLAN 0x00000002
1151#define IXGB_TX_FLAGS_TSO 0x00000004
1152
235949d1 1153static int
1da177e4
LT		 1154ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1155{
1da177e4
LT		 1156 struct ixgb_context_desc *context_desc;
1157 unsigned int i;
222441a6
JP		 1158 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1159 u16 ipcse, tucse, mss;
1da177e4
LT		 1160 int err;
1161
89114afd 1162 if (likely(skb_is_gso(skb))) {
adc54139 1163 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1164 struct iphdr *iph;
1165
1da177e4
LT		 1166 if (skb_header_cloned(skb)) {
1167 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1168 if (err)
1169 return err;
1170 }
1171
ab6a5bb6 1172 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1173 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1174 iph = ip_hdr(skb);
1175 iph->tot_len = 0;
1176 iph->check = 0;
aa8223c7
ACM		 1177 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1178 iph->daddr, 0,
1179 IPPROTO_TCP, 0);
bbe735e4 1180 ipcss = skb_network_offset(skb);
eddc9ec5 1181 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1182 ipcse = skb_transport_offset(skb) - 1;
1183 tucss = skb_transport_offset(skb);
aa8223c7 1184 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1185 tucse = 0;
1186
1187 i = adapter->tx_ring.next_to_use;
1188 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1189 buffer_info = &adapter->tx_ring.buffer_info[i];
1190 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1191
1192 context_desc->ipcss = ipcss;
1193 context_desc->ipcso = ipcso;
1194 context_desc->ipcse = cpu_to_le16(ipcse);
1195 context_desc->tucss = tucss;
1196 context_desc->tucso = tucso;
1197 context_desc->tucse = cpu_to_le16(tucse);
1198 context_desc->mss = cpu_to_le16(mss);
1199 context_desc->hdr_len = hdr_len;
1200 context_desc->status = 0;
1201 context_desc->cmd_type_len = cpu_to_le32(
1202 IXGB_CONTEXT_DESC_TYPE
1203 | IXGB_CONTEXT_DESC_CMD_TSE
1204 | IXGB_CONTEXT_DESC_CMD_IP
1205 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1206 | IXGB_CONTEXT_DESC_CMD_IDE
1207 | (skb->len - (hdr_len)));
1208
06c2f9ec 1209
03f83041 1210 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1211 adapter->tx_ring.next_to_use = i;
1212
1213 return 1;
1214 }
1da177e4
LT		 1215
1216 return 0;
1217}
1218
446490ca 1219static bool
1da177e4
LT		 1220ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1221{
1222 struct ixgb_context_desc *context_desc;
1223 unsigned int i;
222441a6 1224 u8 css, cso;
1da177e4 1225
03f83041 1226 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1227 struct ixgb_buffer *buffer_info;
ea2ae17d 1228 css = skb_transport_offset(skb);
ff1dcadb 1229 cso = css + skb->csum_offset;
1da177e4
LT		 1230
1231 i = adapter->tx_ring.next_to_use;
1232 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1233 buffer_info = &adapter->tx_ring.buffer_info[i];
1234 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1235
1236 context_desc->tucss = css;
1237 context_desc->tucso = cso;
1238 context_desc->tucse = 0;
1239 /* zero out any previously existing data in one instruction */
222441a6 1240 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1241 context_desc->status = 0;
1242 context_desc->hdr_len = 0;
1243 context_desc->mss = 0;
1244 context_desc->cmd_type_len =
1245 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1246 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1247
03f83041 1248 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1249 adapter->tx_ring.next_to_use = i;
1250
446490ca 1251 return true;
1da177e4
LT		 1252 }
1253
446490ca 1254 return false;
1da177e4
LT		 1255}
1256
1257#define IXGB_MAX_TXD_PWR 14
1258#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1259
235949d1 1260static int
1da177e4
LT		 1261ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1262 unsigned int first)
1263{
1264 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1265 struct ixgb_buffer *buffer_info;
1266 int len = skb->len;
1267 unsigned int offset = 0, size, count = 0, i;
5d927853 1268 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1269
1270 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1271 unsigned int f;
ac79c82e 1272
1da177e4
LT		 1273 len -= skb->data_len;
1274
1275 i = tx_ring->next_to_use;
1276
1277 while(len) {
1278 buffer_info = &tx_ring->buffer_info[i];
709cf018 1279 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1280 /* Workaround for premature desc write-backs
1281 * in TSO mode. Append 4-byte sentinel desc */
1282 if (unlikely(mss && !nr_frags && size == len && size > 8))
1283 size -= 4;
1284
1da177e4 1285 buffer_info->length = size;
adc54139 1286 WARN_ON(buffer_info->dma != 0);
34336635 1287 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1288 buffer_info->dma =
1289 pci_map_single(adapter->pdev,
1290 skb->data + offset,
1291 size,
1292 PCI_DMA_TODEVICE);
1dfdd7df 1293 buffer_info->next_to_watch = 0;
1da177e4
LT		 1294
1295 len -= size;
1296 offset += size;
1297 count++;
03f83041 1298 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1299 }
1300
1301 for(f = 0; f < nr_frags; f++) {
1302 struct skb_frag_struct *frag;
1303
1304 frag = &skb_shinfo(skb)->frags[f];
1305 len = frag->size;
1306 offset = 0;
1307
1308 while(len) {
1309 buffer_info = &tx_ring->buffer_info[i];
709cf018 1310 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1311
1312 /* Workaround for premature desc write-backs
1313 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1314 if (unlikely(mss && (f == (nr_frags - 1))
1315 && size == len && size > 8))
5d927853
JB		 1316 size -= 4;
1317
1da177e4 1318 buffer_info->length = size;
34336635 1319 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1320 buffer_info->dma =
1321 pci_map_page(adapter->pdev,
1322 frag->page,
1323 frag->page_offset + offset,
1324 size,
1325 PCI_DMA_TODEVICE);
1dfdd7df 1326 buffer_info->next_to_watch = 0;
1da177e4
LT		 1327
1328 len -= size;
1329 offset += size;
1330 count++;
03f83041 1331 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1332 }
1333 }
1334 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1335 tx_ring->buffer_info[i].skb = skb;
1336 tx_ring->buffer_info[first].next_to_watch = i;
1337
1338 return count;
1339}
1340
235949d1 1341static void
1da177e4
LT		 1342ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1343{
1344 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1345 struct ixgb_tx_desc *tx_desc = NULL;
1346 struct ixgb_buffer *buffer_info;
222441a6
JP		 1347 u32 cmd_type_len = adapter->tx_cmd_type;
1348 u8 status = 0;
1349 u8 popts = 0;
1da177e4
LT		 1350 unsigned int i;
1351
03f83041 1352 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1353 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1354 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1355 }
1356
03f83041 1357 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1358 popts |= IXGB_TX_DESC_POPTS_TXSM;
1359
03f83041 1360 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1361 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1362
1363 i = tx_ring->next_to_use;
1364
1365 while(count--) {
1366 buffer_info = &tx_ring->buffer_info[i];
1367 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1368 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1369 tx_desc->cmd_type_len =
1370 cpu_to_le32(cmd_type_len | buffer_info->length);
1371 tx_desc->status = status;
1372 tx_desc->popts = popts;
1373 tx_desc->vlan = cpu_to_le16(vlan_id);
1374
03f83041 1375 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1376 }
1377
1378 tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1379 | IXGB_TX_DESC_CMD_RS );
1380
1381 /* Force memory writes to complete before letting h/w
1382 * know there are new descriptors to fetch. (Only
1383 * applicable for weak-ordered memory model archs,
1384 * such as IA-64). */
1385 wmb();
1386
1387 tx_ring->next_to_use = i;
1388 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1389}
1390
dfd341e4
JB		 1391static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1392{
1393 struct ixgb_adapter *adapter = netdev_priv(netdev);
1394 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1395
1396 netif_stop_queue(netdev);
1397 /* Herbert's original patch had:
1398 * smp_mb__after_netif_stop_queue();
1399 * but since that doesn't exist yet, just open code it. */
1400 smp_mb();
1401
1402 /* We need to check again in a case another CPU has just
1403 * made room available. */
1404 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1405 return -EBUSY;
1406
1407 /* A reprieve! */
1408 netif_start_queue(netdev);
1409 ++adapter->restart_queue;
1410 return 0;
1411}
1412
1413static int ixgb_maybe_stop_tx(struct net_device *netdev,
1414 struct ixgb_desc_ring *tx_ring, int size)
1415{
1416 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1417 return 0;
1418 return __ixgb_maybe_stop_tx(netdev, size);
1419}
1420
1421
1da177e4
LT		 1422/* Tx Descriptors needed, worst case */
1423#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1424 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1425#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1426 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1427 + 1 /* one more needed for sentinel TSO workaround */
1da177e4
LT		 1428
1429static int
1430ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1431{
8908c6cd 1432 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1433 unsigned int first;
1434 unsigned int tx_flags = 0;
1da177e4
LT		 1435 int vlan_id = 0;
1436 int tso;
1437
bab2bce7
JB		 1438 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1439 dev_kfree_skb(skb);
1440 return NETDEV_TX_OK;
1441 }
1442
03f83041 1443 if (skb->len <= 0) {
1da177e4
LT		 1444 dev_kfree_skb_any(skb);
1445 return 0;
1446 }
1447
dfd341e4 1448 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1449 DESC_NEEDED)))
f017f14b 1450 return NETDEV_TX_BUSY;
1da177e4 1451
03f83041 1452 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1da177e4
LT		 1453 tx_flags |= IXGB_TX_FLAGS_VLAN;
1454 vlan_id = vlan_tx_tag_get(skb);
1455 }
1456
1457 first = adapter->tx_ring.next_to_use;
1458
1459 tso = ixgb_tso(adapter, skb);
1460 if (tso < 0) {
1461 dev_kfree_skb_any(skb);
1462 return NETDEV_TX_OK;
1463 }
1464
96f9c2e2 1465 if (likely(tso))
1da177e4 1466 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1467 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1468 tx_flags |= IXGB_TX_FLAGS_CSUM;
1469
1470 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1471 tx_flags);
1472
1473 netdev->trans_start = jiffies;
1474
f017f14b 1475 /* Make sure there is space in the ring for the next send. */
dfd341e4 1476 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
f017f14b 1477
f017f14b 1478 return NETDEV_TX_OK;
1da177e4
LT		 1479}
1480
1481/**
1482 * ixgb_tx_timeout - Respond to a Tx Hang
1483 * @netdev: network interface device structure
1484 **/
1485
1486static void
1487ixgb_tx_timeout(struct net_device *netdev)
1488{
8908c6cd 1489 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1490
1491 /* Do the reset outside of interrupt context */
1492 schedule_work(&adapter->tx_timeout_task);
1493}
1494
1495static void
c4028958 1496ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1497{
c4028958
DH		 1498 struct ixgb_adapter *adapter =
1499 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1500
9b8118df 1501 adapter->tx_timeout_count++;
446490ca 1502 ixgb_down(adapter, true);
1da177e4
LT		 1503 ixgb_up(adapter);
1504}
1505
1506/**
1507 * ixgb_get_stats - Get System Network Statistics
1508 * @netdev: network interface device structure
1509 *
1510 * Returns the address of the device statistics structure.
1511 * The statistics are actually updated from the timer callback.
1512 **/
1513
1514static struct net_device_stats *
1515ixgb_get_stats(struct net_device *netdev)
1516{
8908c6cd 1517 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1518
1519 return &adapter->net_stats;
1520}
1521
1522/**
1523 * ixgb_change_mtu - Change the Maximum Transfer Unit
1524 * @netdev: network interface device structure
1525 * @new_mtu: new value for maximum frame size
1526 *
1527 * Returns 0 on success, negative on failure
1528 **/
1529
1530static int
1531ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1532{
8908c6cd 1533 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1534 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1535 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1536
a65a604a
JB		 1537 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1538 if ((new_mtu < 68) ||
1539 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
ec9c3f5d 1540 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1541 return -EINVAL;
1542 }
1543
b5ca88eb
JB		 1544 if (old_max_frame == max_frame)
1545 return 0;
1546
1547 if (netif_running(netdev))
1548 ixgb_down(adapter, true);
1549
a3dc3da0 1550 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1551
1552 netdev->mtu = new_mtu;
1553
b5ca88eb 1554 if (netif_running(netdev))
1da177e4 1555 ixgb_up(adapter);
1da177e4
LT		 1556
1557 return 0;
1558}
1559
1560/**
1561 * ixgb_update_stats - Update the board statistics counters.
1562 * @adapter: board private structure
1563 **/
1564
1565void
1566ixgb_update_stats(struct ixgb_adapter *adapter)
1567{
5633684d 1568 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1569 struct pci_dev *pdev = adapter->pdev;
1570
1571 /* Prevent stats update while adapter is being reset */
81b1955e 1572 if (pci_channel_offline(pdev))
01748fbb 1573 return;
5633684d 1574
03f83041 1575 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
5633684d
MC		 1576 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1577 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1578 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1579 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1580 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1581
1582 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1583 /* fix up multicast stats by removing broadcasts */
03f83041 1584 if (multi >= bcast)
7b89178d 1585 multi -= bcast;
5633684d
MC		 1586
1587 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1588 adapter->stats.mprch += (multi >> 32);
1589 adapter->stats.bprcl += bcast_l;
1590 adapter->stats.bprch += bcast_h;
1591 } else {
1592 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1593 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1594 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1595 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1596 }
1da177e4
LT		 1597 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1598 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1599 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1600 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1601 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1602 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1603 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1604 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1605 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1606 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1607 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1608 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1609 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1610 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1611 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1612 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1613 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1614 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1615 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1616 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1617 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1618 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1619 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1620 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1621 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1622 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1623 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1624 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1625 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1626 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1627 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1628 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1629 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1630 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1631 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1632 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1633 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1634 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1635 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1636 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1637 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1638 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1639 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1640 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1641 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1642 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1643 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1644 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1645 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1646 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1647 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1648 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1649 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1650 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1651 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1652 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1653
1654 /* Fill out the OS statistics structure */
1655
1656 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1657 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1658 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1659 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1660 adapter->net_stats.multicast = adapter->stats.mprcl;
1661 adapter->net_stats.collisions = 0;
1662
1663 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1664 * with a length in the type/len field */
1665 adapter->net_stats.rx_errors =
1666 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1667 adapter->stats.ruc +
1668 adapter->stats.roc /*+ adapter->stats.rlec */ +
1669 adapter->stats.icbc +
1670 adapter->stats.ecbc + adapter->stats.mpc;
1671
1da177e4
LT		 1672 /* see above
1673 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1674 */
1675
1676 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1677 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1678 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1679 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1680
1681 adapter->net_stats.tx_errors = 0;
1682 adapter->net_stats.rx_frame_errors = 0;
1683 adapter->net_stats.tx_aborted_errors = 0;
1684 adapter->net_stats.tx_carrier_errors = 0;
1685 adapter->net_stats.tx_fifo_errors = 0;
1686 adapter->net_stats.tx_heartbeat_errors = 0;
1687 adapter->net_stats.tx_window_errors = 0;
1688}
1689
1690#define IXGB_MAX_INTR 10
1691/**
1692 * ixgb_intr - Interrupt Handler
1693 * @irq: interrupt number
1694 * @data: pointer to a network interface device structure
1da177e4
LT		 1695 **/
1696
1697static irqreturn_t
7d12e780 1698ixgb_intr(int irq, void *data)
1da177e4
LT		 1699{
1700 struct net_device *netdev = data;
8908c6cd 1701 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1702 struct ixgb_hw *hw = &adapter->hw;
222441a6 1703 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4
LT		 1704#ifndef CONFIG_IXGB_NAPI
1705 unsigned int i;
1706#endif
1707
03f83041 1708 if (unlikely(!icr))
1da177e4
LT		 1709 return IRQ_NONE; /* Not our interrupt */
1710
bab2bce7
JB		 1711 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1712 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1713 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4
LT		 1714
1715#ifdef CONFIG_IXGB_NAPI
bea3348e 1716 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1da177e4
LT		 1717
1718 /* Disable interrupts and register for poll. The flush
1719 of the posted write is intentionally left out.
1720 */
1721
1da177e4 1722 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
bea3348e 1723 __netif_rx_schedule(netdev, &adapter->napi);
1da177e4
LT		 1724 }
1725#else
1726 /* yes, that is actually a & and it is meant to make sure that
1727 * every pass through this for loop checks both receive and
1728 * transmit queues for completed descriptors, intended to
1729 * avoid starvation issues and assist tx/rx fairness. */
1730 for(i = 0; i < IXGB_MAX_INTR; i++)
03f83041 1731 if (!ixgb_clean_rx_irq(adapter) &
1da177e4
LT		 1732 !ixgb_clean_tx_irq(adapter))
1733 break;
1734#endif
1735 return IRQ_HANDLED;
1736}
1737
1738#ifdef CONFIG_IXGB_NAPI
1739/**
1740 * ixgb_clean - NAPI Rx polling callback
1741 * @adapter: board private structure
1742 **/
1743
1744static int
bea3348e 1745ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1746{
bea3348e
SH		 1747 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1748 struct net_device *netdev = adapter->netdev;
1da177e4
LT		 1749 int work_done = 0;
1750
53e52c72 1751 ixgb_clean_tx_irq(adapter);
bea3348e 1752 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1753
53e52c72
DM		 1754 /* If budget not fully consumed, exit the polling mode */
1755 if (work_done < budget) {
bea3348e 1756 netif_rx_complete(netdev, napi);
72ab5195
JB		 1757 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1758 ixgb_irq_enable(adapter);
1da177e4
LT		 1759 }
1760
bea3348e 1761 return work_done;
1da177e4
LT		 1762}
1763#endif
1764
1765/**
1766 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1767 * @adapter: board private structure
1768 **/
1769
446490ca 1770static bool
1da177e4
LT		 1771ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1772{
1773 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1774 struct net_device *netdev = adapter->netdev;
1775 struct ixgb_tx_desc *tx_desc, *eop_desc;
1776 struct ixgb_buffer *buffer_info;
1777 unsigned int i, eop;
446490ca 1778 bool cleaned = false;
1da177e4
LT		 1779
1780 i = tx_ring->next_to_clean;
1781 eop = tx_ring->buffer_info[i].next_to_watch;
1782 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1783
1784 while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1785
446490ca 1786 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1787 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1788 buffer_info = &tx_ring->buffer_info[i];
1789
1790 if (tx_desc->popts
1791 & (IXGB_TX_DESC_POPTS_TXSM |
1792 IXGB_TX_DESC_POPTS_IXSM))
1793 adapter->hw_csum_tx_good++;
1794
1795 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1796
222441a6 1797 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1798
1799 cleaned = (i == eop);
03f83041 1800 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1801 }
1802
1803 eop = tx_ring->buffer_info[i].next_to_watch;
1804 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1805 }
1806
1807 tx_ring->next_to_clean = i;
1808
0f8ecbad
JB		 1809 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1810 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1811 /* Make sure that anybody stopping the queue after this
1812 * sees the new next_to_clean. */
1813 smp_mb();
1814
1815 if (netif_queue_stopped(netdev) &&
1816 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1817 netif_wake_queue(netdev);
0f8ecbad
JB		 1818 ++adapter->restart_queue;
1819 }
1da177e4 1820 }
1da177e4 1821
03f83041 1822 if (adapter->detect_tx_hung) {
1da177e4
LT		 1823 /* detect a transmit hang in hardware, this serializes the
1824 * check with the clearing of time_stamp and movement of i */
446490ca 1825 adapter->detect_tx_hung = false;
9b8118df
AK		 1826 if (tx_ring->buffer_info[eop].dma &&
1827 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1828 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1829 IXGB_STATUS_TXOFF)) {
1830 /* detected Tx unit hang */
1831 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1832 " TDH <%x>\n"
1833 " TDT <%x>\n"
1834 " next_to_use <%x>\n"
1835 " next_to_clean <%x>\n"
1836 "buffer_info[next_to_clean]\n"
1837 " time_stamp <%lx>\n"
1838 " next_to_watch <%x>\n"
1839 " jiffies <%lx>\n"
1840 " next_to_watch.status <%x>\n",
1841 IXGB_READ_REG(&adapter->hw, TDH),
1842 IXGB_READ_REG(&adapter->hw, TDT),
1843 tx_ring->next_to_use,
1844 tx_ring->next_to_clean,
1845 tx_ring->buffer_info[eop].time_stamp,
1846 eop,
1847 jiffies,
1848 eop_desc->status);
1da177e4 1849 netif_stop_queue(netdev);
9b8118df 1850 }
1da177e4
LT		 1851 }
1852
1853 return cleaned;
1854}
1855
1856/**
1857 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1858 * @adapter: board private structure
1859 * @rx_desc: receive descriptor
1860 * @sk_buff: socket buffer with received data
1861 **/
1862
235949d1 1863static void
1da177e4
LT		 1864ixgb_rx_checksum(struct ixgb_adapter *adapter,
1865 struct ixgb_rx_desc *rx_desc,
1866 struct sk_buff *skb)
1867{
1868 /* Ignore Checksum bit is set OR
1869 * TCP Checksum has not been calculated
1870 */
03f83041 1871 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4
LT		 1872 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1873 skb->ip_summed = CHECKSUM_NONE;
1874 return;
1875 }
1876
1877 /* At this point we know the hardware did the TCP checksum */
1878 /* now look at the TCP checksum error bit */
03f83041 1879 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4
LT		 1880 /* let the stack verify checksum errors */
1881 skb->ip_summed = CHECKSUM_NONE;
1882 adapter->hw_csum_rx_error++;
1883 } else {
1884 /* TCP checksum is good */
1885 skb->ip_summed = CHECKSUM_UNNECESSARY;
1886 adapter->hw_csum_rx_good++;
1887 }
1888}
1889
1890/**
1891 * ixgb_clean_rx_irq - Send received data up the network stack,
1892 * @adapter: board private structure
1893 **/
1894
446490ca 1895static bool
1da177e4
LT		 1896#ifdef CONFIG_IXGB_NAPI
1897ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1898#else
1899ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1900#endif
1901{
1902 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1903 struct net_device *netdev = adapter->netdev;
1904 struct pci_dev *pdev = adapter->pdev;
1905 struct ixgb_rx_desc *rx_desc, *next_rxd;
1906 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1907 u32 length;
1da177e4 1908 unsigned int i, j;
446490ca 1909 bool cleaned = false;
1da177e4
LT		 1910
1911 i = rx_ring->next_to_clean;
1912 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1913 buffer_info = &rx_ring->buffer_info[i];
1914
1915 while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
f404de1c
MC		 1916 struct sk_buff *skb, *next_skb;
1917 u8 status;
1da177e4
LT		 1918
1919#ifdef CONFIG_IXGB_NAPI
03f83041 1920 if (*work_done >= work_to_do)
1da177e4
LT		 1921 break;
1922
1923 (*work_done)++;
1924#endif
f404de1c 1925 status = rx_desc->status;
1da177e4 1926 skb = buffer_info->skb;
1dfdd7df 1927 buffer_info->skb = NULL;
f404de1c 1928
1da177e4
LT		 1929 prefetch(skb->data);
1930
03f83041 1931 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 1932 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1933 prefetch(next_rxd);
1934
03f83041 1935 if ((j = i + 1) == rx_ring->count) j = 0;
1da177e4
LT		 1936 next2_buffer = &rx_ring->buffer_info[j];
1937 prefetch(next2_buffer);
1938
1939 next_buffer = &rx_ring->buffer_info[i];
1940 next_skb = next_buffer->skb;
1941 prefetch(next_skb);
1942
446490ca 1943 cleaned = true;
1da177e4
LT		 1944
1945 pci_unmap_single(pdev,
1946 buffer_info->dma,
1947 buffer_info->length,
1948 PCI_DMA_FROMDEVICE);
1949
1950 length = le16_to_cpu(rx_desc->length);
1951
03f83041 1952 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 1953
1954 /* All receives must fit into a single buffer */
1955
1956 IXGB_DBG("Receive packet consumed multiple buffers "
1957 "length<%x>\n", length);
1958
1959 dev_kfree_skb_irq(skb);
f404de1c 1960 goto rxdesc_done;
1da177e4
LT		 1961 }
1962
1963 if (unlikely(rx_desc->errors
1964 & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
1965 | IXGB_RX_DESC_ERRORS_P |
1966 IXGB_RX_DESC_ERRORS_RXE))) {
1967
1968 dev_kfree_skb_irq(skb);
f404de1c 1969 goto rxdesc_done;
1da177e4
LT		 1970 }
1971
6b900bb4
AK		 1972 /* code added for copybreak, this should improve
1973 * performance for small packets with large amounts
1974 * of reassembly being done in the stack */
d9fed18b 1975 if (length < copybreak) {
6b900bb4 1976 struct sk_buff *new_skb =
5791704f 1977 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
6b900bb4
AK		 1978 if (new_skb) {
1979 skb_reserve(new_skb, NET_IP_ALIGN);
27d7ff46
ACM		 1980 skb_copy_to_linear_data_offset(new_skb,
1981 -NET_IP_ALIGN,
1982 (skb->data -
1983 NET_IP_ALIGN),
1984 (length +
1985 NET_IP_ALIGN));
6b900bb4
AK		 1986 /* save the skb in buffer_info as good */
1987 buffer_info->skb = skb;
1988 skb = new_skb;
1989 }
1990 }
1991 /* end copybreak code */
1992
1da177e4
LT		 1993 /* Good Receive */
1994 skb_put(skb, length);
1995
1996 /* Receive Checksum Offload */
1997 ixgb_rx_checksum(adapter, rx_desc, skb);
1998
1999 skb->protocol = eth_type_trans(skb, netdev);
2000#ifdef CONFIG_IXGB_NAPI
03f83041 2001 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2002 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
38b22195 2003 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2004 } else {
2005 netif_receive_skb(skb);
2006 }
2007#else /* CONFIG_IXGB_NAPI */
03f83041 2008 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2009 vlan_hwaccel_rx(skb, adapter->vlgrp,
38b22195 2010 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2011 } else {
2012 netif_rx(skb);
2013 }
2014#endif /* CONFIG_IXGB_NAPI */
2015 netdev->last_rx = jiffies;
2016
f404de1c
MC		 2017rxdesc_done:
2018 /* clean up descriptor, might be written over by hw */
1da177e4 2019 rx_desc->status = 0;
1da177e4 2020
f404de1c 2021 /* use prefetched values */
1da177e4
LT		 2022 rx_desc = next_rxd;
2023 buffer_info = next_buffer;
2024 }
2025
2026 rx_ring->next_to_clean = i;
2027
2028 ixgb_alloc_rx_buffers(adapter);
2029
2030 return cleaned;
2031}
2032
2033/**
2034 * ixgb_alloc_rx_buffers - Replace used receive buffers
2035 * @adapter: address of board private structure
2036 **/
2037
2038static void
2039ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
2040{
2041 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2042 struct net_device *netdev = adapter->netdev;
2043 struct pci_dev *pdev = adapter->pdev;
2044 struct ixgb_rx_desc *rx_desc;
2045 struct ixgb_buffer *buffer_info;
2046 struct sk_buff *skb;
2047 unsigned int i;
1da177e4
LT		 2048 long cleancount;
2049
2050 i = rx_ring->next_to_use;
2051 buffer_info = &rx_ring->buffer_info[i];
2052 cleancount = IXGB_DESC_UNUSED(rx_ring);
2053
1da177e4 2054
41639fed
MC		 2055 /* leave three descriptors unused */
2056 while(--cleancount > 2) {
1dfdd7df 2057 /* recycle! its good for you */
69c7a940
AK		 2058 skb = buffer_info->skb;
2059 if (skb) {
1dfdd7df
AK		 2060 skb_trim(skb, 0);
2061 goto map_skb;
2062 }
1da177e4 2063
69c7a940
AK		 2064 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2065 + NET_IP_ALIGN);
1dfdd7df 2066 if (unlikely(!skb)) {
1da177e4 2067 /* Better luck next round */
1dfdd7df 2068 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2069 break;
2070 }
2071
2072 /* Make buffer alignment 2 beyond a 16 byte boundary
2073 * this will result in a 16 byte aligned IP header after
2074 * the 14 byte MAC header is removed
2075 */
2076 skb_reserve(skb, NET_IP_ALIGN);
2077
1da177e4
LT		 2078 buffer_info->skb = skb;
2079 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df
AK		 2080map_skb:
2081 buffer_info->dma = pci_map_single(pdev,
2082 skb->data,
2083 adapter->rx_buffer_len,
2084 PCI_DMA_FROMDEVICE);
1da177e4 2085
1dfdd7df 2086 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2087 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed
MC		 2088 /* guarantee DD bit not set now before h/w gets descriptor
2089 * this is the rest of the workaround for h/w double
2090 * writeback. */
2091 rx_desc->status = 0;
1da177e4 2092
1da177e4 2093
03f83041 2094 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2095 buffer_info = &rx_ring->buffer_info[i];
2096 }
2097
1dfdd7df
AK		 2098 if (likely(rx_ring->next_to_use != i)) {
2099 rx_ring->next_to_use = i;
2100 if (unlikely(i-- == 0))
2101 i = (rx_ring->count - 1);
2102
2103 /* Force memory writes to complete before letting h/w
2104 * know there are new descriptors to fetch. (Only
2105 * applicable for weak-ordered memory model archs, such
2106 * as IA-64). */
2107 wmb();
2108 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2109 }
1da177e4
LT		 2110}
2111
2112/**
2113 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2114 *
2115 * @param netdev network interface device structure
2116 * @param grp indicates to enable or disable tagging/stripping
2117 **/
2118static void
2119ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2120{
8908c6cd 2121 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2122 u32 ctrl, rctl;
1da177e4
LT		 2123
2124 ixgb_irq_disable(adapter);
2125 adapter->vlgrp = grp;
2126
03f83041 2127 if (grp) {
1da177e4
LT		 2128 /* enable VLAN tag insert/strip */
2129 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2130 ctrl |= IXGB_CTRL0_VME;
2131 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2132
2133 /* enable VLAN receive filtering */
2134
2135 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2136 rctl |= IXGB_RCTL_VFE;
2137 rctl &= ~IXGB_RCTL_CFIEN;
2138 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2139 } else {
2140 /* disable VLAN tag insert/strip */
2141
2142 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2143 ctrl &= ~IXGB_CTRL0_VME;
2144 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2145
2146 /* disable VLAN filtering */
2147
2148 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2149 rctl &= ~IXGB_RCTL_VFE;
2150 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2151 }
2152
bab2bce7
JB		 2153 /* don't enable interrupts unless we are UP */
2154 if (adapter->netdev->flags & IFF_UP)
2155 ixgb_irq_enable(adapter);
1da177e4
LT		 2156}
2157
2158static void
222441a6 2159ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2160{
8908c6cd 2161 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2162 u32 vfta, index;
1da177e4
LT		 2163
2164 /* add VID to filter table */
2165
2166 index = (vid >> 5) & 0x7F;
2167 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2168 vfta |= (1 << (vid & 0x1F));
2169 ixgb_write_vfta(&adapter->hw, index, vfta);
2170}
2171
2172static void
222441a6 2173ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2174{
8908c6cd 2175 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2176 u32 vfta, index;
1da177e4
LT		 2177
2178 ixgb_irq_disable(adapter);
2179
5c15bdec 2180 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 2181
bab2bce7
JB		 2182 /* don't enable interrupts unless we are UP */
2183 if (adapter->netdev->flags & IFF_UP)
2184 ixgb_irq_enable(adapter);
1da177e4 2185
bab2bce7 2186 /* remove VID from filter table */
1da177e4
LT		 2187
2188 index = (vid >> 5) & 0x7F;
2189 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2190 vfta &= ~(1 << (vid & 0x1F));
2191 ixgb_write_vfta(&adapter->hw, index, vfta);
2192}
2193
2194static void
2195ixgb_restore_vlan(struct ixgb_adapter *adapter)
2196{
2197 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2198
03f83041 2199 if (adapter->vlgrp) {
222441a6 2200 u16 vid;
1da177e4 2201 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
03f83041 2202 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2203 continue;
2204 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2205 }
2206 }
2207}
2208
1da177e4
LT		 2209#ifdef CONFIG_NET_POLL_CONTROLLER
2210/*
2211 * Polling 'interrupt' - used by things like netconsole to send skbs
2212 * without having to re-enable interrupts. It's not called while
2213 * the interrupt routine is executing.
2214 */
2215
2216static void ixgb_netpoll(struct net_device *dev)
2217{
f990b426 2218 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2219
1da177e4 2220 disable_irq(adapter->pdev->irq);
7d12e780 2221 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2222 enable_irq(adapter->pdev->irq);
2223}
2224#endif
2225
01748fbb
LV		 2226/**
2227 * ixgb_io_error_detected() - called when PCI error is detected
2228 * @pdev pointer to pci device with error
2229 * @state pci channel state after error
2230 *
2231 * This callback is called by the PCI subsystem whenever
2232 * a PCI bus error is detected.
2233 */
2234static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
2235 enum pci_channel_state state)
2236{
2237 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2238 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2239
03f83041 2240 if (netif_running(netdev))
446490ca 2241 ixgb_down(adapter, true);
01748fbb
LV		 2242
2243 pci_disable_device(pdev);
2244
2245 /* Request a slot reset. */
2246 return PCI_ERS_RESULT_NEED_RESET;
2247}
2248
2249/**
2250 * ixgb_io_slot_reset - called after the pci bus has been reset.
2251 * @pdev pointer to pci device with error
2252 *
2253 * This callback is called after the PCI buss has been reset.
2254 * Basically, this tries to restart the card from scratch.
2255 * This is a shortened version of the device probe/discovery code,
2256 * it resembles the first-half of the ixgb_probe() routine.
2257 */
2258static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev)
2259{
2260 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2261 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2262
03f83041 2263 if (pci_enable_device(pdev)) {
01748fbb
LV		 2264 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2265 return PCI_ERS_RESULT_DISCONNECT;
2266 }
2267
2268 /* Perform card reset only on one instance of the card */
2269 if (0 != PCI_FUNC (pdev->devfn))
2270 return PCI_ERS_RESULT_RECOVERED;
2271
2272 pci_set_master(pdev);
2273
2274 netif_carrier_off(netdev);
2275 netif_stop_queue(netdev);
2276 ixgb_reset(adapter);
2277
2278 /* Make sure the EEPROM is good */
03f83041 2279 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
01748fbb
LV		 2280 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2281 return PCI_ERS_RESULT_DISCONNECT;
2282 }
2283 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2284 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2285
03f83041 2286 if (!is_valid_ether_addr(netdev->perm_addr)) {
01748fbb
LV		 2287 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2288 return PCI_ERS_RESULT_DISCONNECT;
2289 }
2290
2291 return PCI_ERS_RESULT_RECOVERED;
2292}
2293
2294/**
2295 * ixgb_io_resume - called when its OK to resume normal operations
2296 * @pdev pointer to pci device with error
2297 *
2298 * The error recovery driver tells us that its OK to resume
2299 * normal operation. Implementation resembles the second-half
2300 * of the ixgb_probe() routine.
2301 */
2302static void ixgb_io_resume (struct pci_dev *pdev)
2303{
2304 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2305 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2306
2307 pci_set_master(pdev);
2308
03f83041
JB		 2309 if (netif_running(netdev)) {
2310 if (ixgb_up(adapter)) {
01748fbb
LV		 2311 printk ("ixgb: can't bring device back up after reset\n");
2312 return;
2313 }
2314 }
2315
2316 netif_device_attach(netdev);
2317 mod_timer(&adapter->watchdog_timer, jiffies);
2318}
2319
1da177e4 2320/* ixgb_main.c */
Clone of davem's net-next-2.6 tree