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[net-next-2.6.git] / drivers / net / ixgb / ixgb_main.c
CommitLineData
1da177e4
LT		 1/*******************************************************************************
2
0abb6eb1 3 Intel PRO/10GbE Linux driver
f731a9ef 4 Copyright(c) 1999 - 2008 Intel Corporation.
0abb6eb1
AK		 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 33
1da177e4 34#define DRIVERNAPI "-NAPI"
f731a9ef 35#define DRV_VERSION "1.0.135-k2" DRIVERNAPI
273dc74e 36const char ixgb_driver_version[] = DRV_VERSION;
f731a9ef 37static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation.";
1da177e4 38
d9fed18b
JB		 39#define IXGB_CB_LENGTH 256
40static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
41module_param(copybreak, uint, 0644);
42MODULE_PARM_DESC(copybreak,
43 "Maximum size of packet that is copied to a new buffer on receive");
44
1da177e4
LT		 45/* ixgb_pci_tbl - PCI Device ID Table
46 *
47 * Wildcard entries (PCI_ANY_ID) should come last
48 * Last entry must be all 0s
49 *
50 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
51 * Class, Class Mask, private data (not used) }
52 */
53static struct pci_device_id ixgb_pci_tbl[] = {
54 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
55 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
940829e2
AK		 56 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
57 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1da177e4
LT		 58 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
59 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
7490d71a 60 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
1da177e4
LT		 61 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
62
63 /* required last entry */
64 {0,}
65};
66
67MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
68
69/* Local Function Prototypes */
1da177e4
LT		 70static int ixgb_init_module(void);
71static void ixgb_exit_module(void);
72static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
73static void __devexit ixgb_remove(struct pci_dev *pdev);
74static int ixgb_sw_init(struct ixgb_adapter *adapter);
75static int ixgb_open(struct net_device *netdev);
76static int ixgb_close(struct net_device *netdev);
77static void ixgb_configure_tx(struct ixgb_adapter *adapter);
78static void ixgb_configure_rx(struct ixgb_adapter *adapter);
79static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
80static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
81static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
82static void ixgb_set_multi(struct net_device *netdev);
83static void ixgb_watchdog(unsigned long data);
84static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
85static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
86static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
87static int ixgb_set_mac(struct net_device *netdev, void *p);
7d12e780 88static irqreturn_t ixgb_intr(int irq, void *data);
446490ca 89static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
ac79c82e 90
7490d71a
JB		 91static int ixgb_clean(struct napi_struct *, int);
92static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
fc2d14e3 93static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);
7490d71a 94
1da177e4 95static void ixgb_tx_timeout(struct net_device *dev);
c4028958 96static void ixgb_tx_timeout_task(struct work_struct *work);
7490d71a 97
1da177e4 98static void ixgb_vlan_rx_register(struct net_device *netdev,
7490d71a 99 struct vlan_group *grp);
222441a6
JP		 100static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
101static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
1da177e4
LT		 102static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
103
1da177e4
LT		 104#ifdef CONFIG_NET_POLL_CONTROLLER
105/* for netdump / net console */
106static void ixgb_netpoll(struct net_device *dev);
107#endif
108
01748fbb 109static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
7490d71a 110 enum pci_channel_state state);
01748fbb
LV		 111static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
112static void ixgb_io_resume (struct pci_dev *pdev);
1da177e4 113
01748fbb
LV		 114static struct pci_error_handlers ixgb_err_handler = {
115 .error_detected = ixgb_io_error_detected,
116 .slot_reset = ixgb_io_slot_reset,
117 .resume = ixgb_io_resume,
118};
119
1da177e4 120static struct pci_driver ixgb_driver = {
c2eba932 121 .name = ixgb_driver_name,
1da177e4 122 .id_table = ixgb_pci_tbl,
c2eba932
MC		 123 .probe = ixgb_probe,
124 .remove = __devexit_p(ixgb_remove),
01748fbb 125 .err_handler = &ixgb_err_handler
1da177e4
LT		 126};
127
128MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
129MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
130MODULE_LICENSE("GPL");
01e5abc2 131MODULE_VERSION(DRV_VERSION);
1da177e4 132
ec9c3f5d
AK		 133#define DEFAULT_DEBUG_LEVEL_SHIFT 3
134static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
135module_param(debug, int, 0);
136MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
137
1da177e4
LT		 138/**
139 * ixgb_init_module - Driver Registration Routine
140 *
141 * ixgb_init_module is the first routine called when the driver is
142 * loaded. All it does is register with the PCI subsystem.
143 **/
144
145static int __init
146ixgb_init_module(void)
147{
1da177e4
LT		 148 printk(KERN_INFO "%s - version %s\n",
149 ixgb_driver_string, ixgb_driver_version);
150
151 printk(KERN_INFO "%s\n", ixgb_copyright);
152
29917620 153 return pci_register_driver(&ixgb_driver);
1da177e4
LT		 154}
155
156module_init(ixgb_init_module);
157
158/**
159 * ixgb_exit_module - Driver Exit Cleanup Routine
160 *
161 * ixgb_exit_module is called just before the driver is removed
162 * from memory.
163 **/
164
165static void __exit
166ixgb_exit_module(void)
167{
1da177e4
LT		 168 pci_unregister_driver(&ixgb_driver);
169}
170
171module_exit(ixgb_exit_module);
172
173/**
174 * ixgb_irq_disable - Mask off interrupt generation on the NIC
175 * @adapter: board private structure
176 **/
177
235949d1 178static void
1da177e4
LT		 179ixgb_irq_disable(struct ixgb_adapter *adapter)
180{
1da177e4
LT		 181 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
182 IXGB_WRITE_FLUSH(&adapter->hw);
183 synchronize_irq(adapter->pdev->irq);
184}
185
186/**
187 * ixgb_irq_enable - Enable default interrupt generation settings
188 * @adapter: board private structure
189 **/
190
235949d1 191static void
1da177e4
LT		 192ixgb_irq_enable(struct ixgb_adapter *adapter)
193{
9c61a9dc
JB		 194 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
195 IXGB_INT_TXDW | IXGB_INT_LSC;
196 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
197 val |= IXGB_INT_GPI0;
198 IXGB_WRITE_REG(&adapter->hw, IMS, val);
199 IXGB_WRITE_FLUSH(&adapter->hw);
1da177e4
LT		 200}
201
202int
203ixgb_up(struct ixgb_adapter *adapter)
204{
205 struct net_device *netdev = adapter->netdev;
fb136c07 206 int err, irq_flags = IRQF_SHARED;
1da177e4
LT		 207 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
208 struct ixgb_hw *hw = &adapter->hw;
209
210 /* hardware has been reset, we need to reload some things */
211
8556f0d1 212 ixgb_rar_set(hw, netdev->dev_addr, 0);
1da177e4
LT		 213 ixgb_set_multi(netdev);
214
215 ixgb_restore_vlan(adapter);
216
217 ixgb_configure_tx(adapter);
218 ixgb_setup_rctl(adapter);
219 ixgb_configure_rx(adapter);
fc2d14e3 220 ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));
1da177e4 221
e59d1696
AK		 222 /* disable interrupts and get the hardware into a known state */
223 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
224
fb136c07
AK		 225 /* only enable MSI if bus is in PCI-X mode */
226 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
227 err = pci_enable_msi(adapter->pdev);
228 if (!err) {
229 adapter->have_msi = 1;
230 irq_flags = 0;
231 }
1da177e4
LT		 232 /* proceed to try to request regular interrupt */
233 }
1da177e4 234
fb136c07
AK		 235 err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
236 netdev->name, netdev);
237 if (err) {
238 if (adapter->have_msi)
239 pci_disable_msi(adapter->pdev);
ec9c3f5d
AK		 240 DPRINTK(PROBE, ERR,
241 "Unable to allocate interrupt Error: %d\n", err);
1da177e4 242 return err;
ec9c3f5d 243 }
1da177e4 244
03f83041 245 if ((hw->max_frame_size != max_frame) ||
1da177e4
LT		 246 (hw->max_frame_size !=
247 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
248
249 hw->max_frame_size = max_frame;
250
251 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
252
03f83041 253 if (hw->max_frame_size >
1da177e4 254 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
222441a6 255 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
1da177e4 256
03f83041 257 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
1da177e4
LT		 258 ctrl0 |= IXGB_CTRL0_JFE;
259 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
260 }
261 }
262 }
263
bab2bce7 264 clear_bit(__IXGB_DOWN, &adapter->flags);
1da177e4 265
bea3348e 266 napi_enable(&adapter->napi);
e59d1696
AK		 267 ixgb_irq_enable(adapter);
268
bab2bce7
JB		 269 mod_timer(&adapter->watchdog_timer, jiffies);
270
1da177e4
LT		 271 return 0;
272}
273
274void
446490ca 275ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
1da177e4
LT		 276{
277 struct net_device *netdev = adapter->netdev;
278
bab2bce7
JB		 279 /* prevent the interrupt handler from restarting watchdog */
280 set_bit(__IXGB_DOWN, &adapter->flags);
281
49d85c50 282 napi_disable(&adapter->napi);
bab2bce7 283 /* waiting for NAPI to complete can re-enable interrupts */
1da177e4
LT		 284 ixgb_irq_disable(adapter);
285 free_irq(adapter->pdev->irq, netdev);
fb136c07
AK		 286
287 if (adapter->have_msi)
1da177e4
LT		 288 pci_disable_msi(adapter->pdev);
289
03f83041 290 if (kill_watchdog)
1da177e4 291 del_timer_sync(&adapter->watchdog_timer);
49d85c50 292
1da177e4
LT		 293 adapter->link_speed = 0;
294 adapter->link_duplex = 0;
295 netif_carrier_off(netdev);
296 netif_stop_queue(netdev);
297
298 ixgb_reset(adapter);
299 ixgb_clean_tx_ring(adapter);
300 ixgb_clean_rx_ring(adapter);
301}
302
303void
304ixgb_reset(struct ixgb_adapter *adapter)
305{
3fd7131f 306 struct ixgb_hw *hw = &adapter->hw;
1da177e4 307
3fd7131f
MW		 308 ixgb_adapter_stop(hw);
309 if (!ixgb_init_hw(hw))
ec9c3f5d 310 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
3fd7131f
MW		 311
312 /* restore frame size information */
313 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
314 if (hw->max_frame_size >
315 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
316 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
317 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
318 ctrl0 |= IXGB_CTRL0_JFE;
319 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
320 }
321 }
1da177e4
LT		 322}
323
324/**
325 * ixgb_probe - Device Initialization Routine
326 * @pdev: PCI device information struct
327 * @ent: entry in ixgb_pci_tbl
328 *
329 * Returns 0 on success, negative on failure
330 *
331 * ixgb_probe initializes an adapter identified by a pci_dev structure.
332 * The OS initialization, configuring of the adapter private structure,
333 * and a hardware reset occur.
334 **/
335
336static int __devinit
0060c072 337ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 338{
339 struct net_device *netdev = NULL;
340 struct ixgb_adapter *adapter;
341 static int cards_found = 0;
1da177e4
LT		 342 int pci_using_dac;
343 int i;
344 int err;
345
9e7bd330
JB		 346 err = pci_enable_device(pdev);
347 if (err)
1da177e4
LT		 348 return err;
349
03f83041 350 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
9e7bd330 351 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
1da177e4
LT		 352 pci_using_dac = 1;
353 } else {
03f83041 354 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
9e7bd330 355 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
ec9c3f5d
AK		 356 printk(KERN_ERR
357 "ixgb: No usable DMA configuration, aborting\n");
c91e468a 358 goto err_dma_mask;
1da177e4
LT		 359 }
360 pci_using_dac = 0;
361 }
362
9e7bd330
JB		 363 err = pci_request_regions(pdev, ixgb_driver_name);
364 if (err)
c91e468a 365 goto err_request_regions;
1da177e4
LT		 366
367 pci_set_master(pdev);
368
369 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
03f83041 370 if (!netdev) {
1da177e4
LT		 371 err = -ENOMEM;
372 goto err_alloc_etherdev;
373 }
374
1da177e4
LT		 375 SET_NETDEV_DEV(netdev, &pdev->dev);
376
377 pci_set_drvdata(pdev, netdev);
8908c6cd 378 adapter = netdev_priv(netdev);
1da177e4
LT		 379 adapter->netdev = netdev;
380 adapter->pdev = pdev;
381 adapter->hw.back = adapter;
ec9c3f5d 382 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
1da177e4 383
275f165f 384 adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
e539e466 385 if (!adapter->hw.hw_addr) {
1da177e4
LT		 386 err = -EIO;
387 goto err_ioremap;
388 }
389
1459336d 390 for (i = BAR_1; i <= BAR_5; i++) {
03f83041 391 if (pci_resource_len(pdev, i) == 0)
1da177e4 392 continue;
03f83041 393 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 394 adapter->hw.io_base = pci_resource_start(pdev, i);
395 break;
396 }
397 }
398
399 netdev->open = &ixgb_open;
400 netdev->stop = &ixgb_close;
401 netdev->hard_start_xmit = &ixgb_xmit_frame;
402 netdev->get_stats = &ixgb_get_stats;
403 netdev->set_multicast_list = &ixgb_set_multi;
404 netdev->set_mac_address = &ixgb_set_mac;
405 netdev->change_mtu = &ixgb_change_mtu;
406 ixgb_set_ethtool_ops(netdev);
407 netdev->tx_timeout = &ixgb_tx_timeout;
9b8118df 408 netdev->watchdog_timeo = 5 * HZ;
bea3348e 409 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4
LT		 410 netdev->vlan_rx_register = ixgb_vlan_rx_register;
411 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
412 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
413#ifdef CONFIG_NET_POLL_CONTROLLER
414 netdev->poll_controller = ixgb_netpoll;
415#endif
416
0eb5a34c 417 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 418
419 adapter->bd_number = cards_found;
420 adapter->link_speed = 0;
421 adapter->link_duplex = 0;
422
423 /* setup the private structure */
424
9e7bd330
JB		 425 err = ixgb_sw_init(adapter);
426 if (err)
1da177e4
LT		 427 goto err_sw_init;
428
429 netdev->features = NETIF_F_SG |
430 NETIF_F_HW_CSUM |
431 NETIF_F_HW_VLAN_TX |
432 NETIF_F_HW_VLAN_RX |
433 NETIF_F_HW_VLAN_FILTER;
1da177e4 434 netdev->features |= NETIF_F_TSO;
1da177e4 435
03f83041 436 if (pci_using_dac)
1da177e4
LT		 437 netdev->features |= NETIF_F_HIGHDMA;
438
439 /* make sure the EEPROM is good */
440
03f83041 441 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
ec9c3f5d 442 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 443 err = -EIO;
444 goto err_eeprom;
445 }
446
447 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
df859c51 448 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1da177e4 449
03f83041 450 if (!is_valid_ether_addr(netdev->perm_addr)) {
ec9c3f5d 451 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1da177e4
LT		 452 err = -EIO;
453 goto err_eeprom;
454 }
455
456 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
457
458 init_timer(&adapter->watchdog_timer);
459 adapter->watchdog_timer.function = &ixgb_watchdog;
460 adapter->watchdog_timer.data = (unsigned long)adapter;
461
c4028958 462 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 463
ec9c3f5d 464 strcpy(netdev->name, "eth%d");
9e7bd330
JB		 465 err = register_netdev(netdev);
466 if (err)
1da177e4
LT		 467 goto err_register;
468
469 /* we're going to reset, so assume we have no link for now */
470
471 netif_carrier_off(netdev);
472 netif_stop_queue(netdev);
473
ec9c3f5d 474 DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
1da177e4
LT		 475 ixgb_check_options(adapter);
476 /* reset the hardware with the new settings */
477
478 ixgb_reset(adapter);
479
480 cards_found++;
481 return 0;
482
483err_register:
484err_sw_init:
485err_eeprom:
486 iounmap(adapter->hw.hw_addr);
487err_ioremap:
488 free_netdev(netdev);
489err_alloc_etherdev:
490 pci_release_regions(pdev);
c91e468a
AS		 491err_request_regions:
492err_dma_mask:
493 pci_disable_device(pdev);
1da177e4
LT		 494 return err;
495}
496
497/**
498 * ixgb_remove - Device Removal Routine
499 * @pdev: PCI device information struct
500 *
501 * ixgb_remove is called by the PCI subsystem to alert the driver
502 * that it should release a PCI device. The could be caused by a
503 * Hot-Plug event, or because the driver is going to be removed from
504 * memory.
505 **/
506
507static void __devexit
508ixgb_remove(struct pci_dev *pdev)
509{
510 struct net_device *netdev = pci_get_drvdata(pdev);
8908c6cd 511 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 512
12579697
JB		 513 flush_scheduled_work();
514
1da177e4
LT		 515 unregister_netdev(netdev);
516
517 iounmap(adapter->hw.hw_addr);
518 pci_release_regions(pdev);
519
520 free_netdev(netdev);
521}
522
523/**
524 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
525 * @adapter: board private structure to initialize
526 *
527 * ixgb_sw_init initializes the Adapter private data structure.
528 * Fields are initialized based on PCI device information and
529 * OS network device settings (MTU size).
530 **/
531
532static int __devinit
533ixgb_sw_init(struct ixgb_adapter *adapter)
534{
535 struct ixgb_hw *hw = &adapter->hw;
536 struct net_device *netdev = adapter->netdev;
537 struct pci_dev *pdev = adapter->pdev;
538
539 /* PCI config space info */
540
541 hw->vendor_id = pdev->vendor;
542 hw->device_id = pdev->device;
543 hw->subsystem_vendor_id = pdev->subsystem_vendor;
544 hw->subsystem_id = pdev->subsystem_device;
545
1da177e4 546 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
a3dc3da0 547 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
1da177e4 548
03f83041 549 if ((hw->device_id == IXGB_DEVICE_ID_82597EX)
940829e2
AK		 550 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
551 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
552 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
0060c072 553 hw->mac_type = ixgb_82597;
1da177e4
LT		 554 else {
555 /* should never have loaded on this device */
ec9c3f5d 556 DPRINTK(PROBE, ERR, "unsupported device id\n");
1da177e4
LT		 557 }
558
559 /* enable flow control to be programmed */
560 hw->fc.send_xon = 1;
561
bab2bce7 562 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 563 return 0;
564}
565
566/**
567 * ixgb_open - Called when a network interface is made active
568 * @netdev: network interface device structure
569 *
570 * Returns 0 on success, negative value on failure
571 *
572 * The open entry point is called when a network interface is made
573 * active by the system (IFF_UP). At this point all resources needed
574 * for transmit and receive operations are allocated, the interrupt
575 * handler is registered with the OS, the watchdog timer is started,
576 * and the stack is notified that the interface is ready.
577 **/
578
579static int
580ixgb_open(struct net_device *netdev)
581{
8908c6cd 582 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 583 int err;
584
585 /* allocate transmit descriptors */
9e7bd330
JB		 586 err = ixgb_setup_tx_resources(adapter);
587 if (err)
1da177e4
LT		 588 goto err_setup_tx;
589
590 /* allocate receive descriptors */
591
9e7bd330
JB		 592 err = ixgb_setup_rx_resources(adapter);
593 if (err)
1da177e4
LT		 594 goto err_setup_rx;
595
9e7bd330
JB		 596 err = ixgb_up(adapter);
597 if (err)
1da177e4
LT		 598 goto err_up;
599
600 return 0;
601
602err_up:
603 ixgb_free_rx_resources(adapter);
604err_setup_rx:
605 ixgb_free_tx_resources(adapter);
606err_setup_tx:
607 ixgb_reset(adapter);
608
609 return err;
610}
611
612/**
613 * ixgb_close - Disables a network interface
614 * @netdev: network interface device structure
615 *
616 * Returns 0, this is not allowed to fail
617 *
618 * The close entry point is called when an interface is de-activated
619 * by the OS. The hardware is still under the drivers control, but
620 * needs to be disabled. A global MAC reset is issued to stop the
621 * hardware, and all transmit and receive resources are freed.
622 **/
623
624static int
625ixgb_close(struct net_device *netdev)
626{
8908c6cd 627 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 628
446490ca 629 ixgb_down(adapter, true);
1da177e4
LT		 630
631 ixgb_free_tx_resources(adapter);
632 ixgb_free_rx_resources(adapter);
633
634 return 0;
635}
636
637/**
638 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
639 * @adapter: board private structure
640 *
641 * Return 0 on success, negative on failure
642 **/
643
644int
645ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
646{
647 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
648 struct pci_dev *pdev = adapter->pdev;
649 int size;
650
651 size = sizeof(struct ixgb_buffer) * txdr->count;
652 txdr->buffer_info = vmalloc(size);
03f83041 653 if (!txdr->buffer_info) {
ec9c3f5d
AK		 654 DPRINTK(PROBE, ERR,
655 "Unable to allocate transmit descriptor ring memory\n");
1da177e4
LT		 656 return -ENOMEM;
657 }
658 memset(txdr->buffer_info, 0, size);
659
660 /* round up to nearest 4K */
661
662 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 663 txdr->size = ALIGN(txdr->size, 4096);
1da177e4
LT		 664
665 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
03f83041 666 if (!txdr->desc) {
1da177e4 667 vfree(txdr->buffer_info);
ec9c3f5d
AK		 668 DPRINTK(PROBE, ERR,
669 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 670 return -ENOMEM;
671 }
672 memset(txdr->desc, 0, txdr->size);
673
674 txdr->next_to_use = 0;
675 txdr->next_to_clean = 0;
676
677 return 0;
678}
679
680/**
681 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
682 * @adapter: board private structure
683 *
684 * Configure the Tx unit of the MAC after a reset.
685 **/
686
687static void
688ixgb_configure_tx(struct ixgb_adapter *adapter)
689{
222441a6
JP		 690 u64 tdba = adapter->tx_ring.dma;
691 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
692 u32 tctl;
1da177e4
LT		 693 struct ixgb_hw *hw = &adapter->hw;
694
0060c072
JB		 695 /* Setup the Base and Length of the Tx Descriptor Ring
696 * tx_ring.dma can be either a 32 or 64 bit value
1da177e4
LT		 697 */
698
699 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
700 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
701
702 IXGB_WRITE_REG(hw, TDLEN, tdlen);
703
704 /* Setup the HW Tx Head and Tail descriptor pointers */
705
706 IXGB_WRITE_REG(hw, TDH, 0);
707 IXGB_WRITE_REG(hw, TDT, 0);
708
709 /* don't set up txdctl, it induces performance problems if configured
710 * incorrectly */
711 /* Set the Tx Interrupt Delay register */
712
713 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
714
715 /* Program the Transmit Control Register */
716
717 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
718 IXGB_WRITE_REG(hw, TCTL, tctl);
719
720 /* Setup Transmit Descriptor Settings for this adapter */
721 adapter->tx_cmd_type =
0060c072
JB		 722 IXGB_TX_DESC_TYPE |
723 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
1da177e4
LT		 724}
725
726/**
727 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
728 * @adapter: board private structure
729 *
730 * Returns 0 on success, negative on failure
731 **/
732
733int
734ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
735{
736 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
737 struct pci_dev *pdev = adapter->pdev;
738 int size;
739
740 size = sizeof(struct ixgb_buffer) * rxdr->count;
741 rxdr->buffer_info = vmalloc(size);
03f83041 742 if (!rxdr->buffer_info) {
ec9c3f5d
AK		 743 DPRINTK(PROBE, ERR,
744 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 745 return -ENOMEM;
746 }
747 memset(rxdr->buffer_info, 0, size);
748
749 /* Round up to nearest 4K */
750
751 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 752 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4
LT		 753
754 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
755
03f83041 756 if (!rxdr->desc) {
1da177e4 757 vfree(rxdr->buffer_info);
ec9c3f5d
AK		 758 DPRINTK(PROBE, ERR,
759 "Unable to allocate receive descriptors\n");
1da177e4
LT		 760 return -ENOMEM;
761 }
762 memset(rxdr->desc, 0, rxdr->size);
763
764 rxdr->next_to_clean = 0;
765 rxdr->next_to_use = 0;
766
767 return 0;
768}
769
770/**
771 * ixgb_setup_rctl - configure the receive control register
772 * @adapter: Board private structure
773 **/
774
775static void
776ixgb_setup_rctl(struct ixgb_adapter *adapter)
777{
222441a6 778 u32 rctl;
1da177e4
LT		 779
780 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
781
782 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
783
784 rctl |=
0060c072
JB		 785 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
786 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
1da177e4
LT		 787 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
788
789 rctl |= IXGB_RCTL_SECRC;
790
3f3dc0dd 791 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 792 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 793 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 794 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 795 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 796 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 797 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 798 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 799
800 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
801}
802
803/**
804 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
805 * @adapter: board private structure
806 *
807 * Configure the Rx unit of the MAC after a reset.
808 **/
809
810static void
811ixgb_configure_rx(struct ixgb_adapter *adapter)
812{
222441a6
JP		 813 u64 rdba = adapter->rx_ring.dma;
814 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 815 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 816 u32 rctl;
817 u32 rxcsum;
1da177e4
LT		 818
819 /* make sure receives are disabled while setting up the descriptors */
820
821 rctl = IXGB_READ_REG(hw, RCTL);
822 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
823
824 /* set the Receive Delay Timer Register */
825
826 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
827
828 /* Setup the Base and Length of the Rx Descriptor Ring */
829
830 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
831 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
832
833 IXGB_WRITE_REG(hw, RDLEN, rdlen);
834
835 /* Setup the HW Rx Head and Tail Descriptor Pointers */
836 IXGB_WRITE_REG(hw, RDH, 0);
837 IXGB_WRITE_REG(hw, RDT, 0);
838
4360386f
JB		 839 /* due to the hardware errata with RXDCTL, we are unable to use any of
840 * the performance enhancing features of it without causing other
841 * subtle bugs, some of the bugs could include receive length
842 * corruption at high data rates (WTHRESH > 0) and/or receive
843 * descriptor ring irregularites (particularly in hardware cache) */
844 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 845
846 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 847 if (adapter->rx_csum) {
1da177e4
LT		 848 rxcsum = IXGB_READ_REG(hw, RXCSUM);
849 rxcsum |= IXGB_RXCSUM_TUOFL;
850 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
851 }
852
853 /* Enable Receives */
854
855 IXGB_WRITE_REG(hw, RCTL, rctl);
856}
857
858/**
859 * ixgb_free_tx_resources - Free Tx Resources
860 * @adapter: board private structure
861 *
862 * Free all transmit software resources
863 **/
864
865void
866ixgb_free_tx_resources(struct ixgb_adapter *adapter)
867{
868 struct pci_dev *pdev = adapter->pdev;
869
870 ixgb_clean_tx_ring(adapter);
871
872 vfree(adapter->tx_ring.buffer_info);
873 adapter->tx_ring.buffer_info = NULL;
874
875 pci_free_consistent(pdev, adapter->tx_ring.size,
876 adapter->tx_ring.desc, adapter->tx_ring.dma);
877
878 adapter->tx_ring.desc = NULL;
879}
880
235949d1 881static void
1da177e4 882ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
0060c072 883 struct ixgb_buffer *buffer_info)
1da177e4
LT		 884{
885 struct pci_dev *pdev = adapter->pdev;
1dfdd7df
AK		 886
887 if (buffer_info->dma)
888 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
889 PCI_DMA_TODEVICE);
890
c2199340
JB		 891 /* okay to call kfree_skb here instead of kfree_skb_any because
892 * this is never called in interrupt context */
1dfdd7df 893 if (buffer_info->skb)
c2199340 894 dev_kfree_skb(buffer_info->skb);
1dfdd7df
AK		 895
896 buffer_info->skb = NULL;
897 buffer_info->dma = 0;
898 buffer_info->time_stamp = 0;
899 /* these fields must always be initialized in tx
900 * buffer_info->length = 0;
901 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 902}
903
904/**
905 * ixgb_clean_tx_ring - Free Tx Buffers
906 * @adapter: board private structure
907 **/
908
909static void
910ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
911{
912 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
913 struct ixgb_buffer *buffer_info;
914 unsigned long size;
915 unsigned int i;
916
917 /* Free all the Tx ring sk_buffs */
918
1459336d 919 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 920 buffer_info = &tx_ring->buffer_info[i];
921 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
922 }
923
924 size = sizeof(struct ixgb_buffer) * tx_ring->count;
925 memset(tx_ring->buffer_info, 0, size);
926
927 /* Zero out the descriptor ring */
928
929 memset(tx_ring->desc, 0, tx_ring->size);
930
931 tx_ring->next_to_use = 0;
932 tx_ring->next_to_clean = 0;
933
934 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
935 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
936}
937
938/**
939 * ixgb_free_rx_resources - Free Rx Resources
940 * @adapter: board private structure
941 *
942 * Free all receive software resources
943 **/
944
945void
946ixgb_free_rx_resources(struct ixgb_adapter *adapter)
947{
948 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
949 struct pci_dev *pdev = adapter->pdev;
950
951 ixgb_clean_rx_ring(adapter);
952
953 vfree(rx_ring->buffer_info);
954 rx_ring->buffer_info = NULL;
955
956 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
957
958 rx_ring->desc = NULL;
959}
960
961/**
962 * ixgb_clean_rx_ring - Free Rx Buffers
963 * @adapter: board private structure
964 **/
965
966static void
967ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
968{
969 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
970 struct ixgb_buffer *buffer_info;
971 struct pci_dev *pdev = adapter->pdev;
972 unsigned long size;
973 unsigned int i;
974
975 /* Free all the Rx ring sk_buffs */
976
1459336d 977 for (i = 0; i < rx_ring->count; i++) {
1da177e4 978 buffer_info = &rx_ring->buffer_info[i];
23e55a32 979 if (buffer_info->dma) {
1da177e4
LT		 980 pci_unmap_single(pdev,
981 buffer_info->dma,
982 buffer_info->length,
983 PCI_DMA_FROMDEVICE);
23e55a32
BJ		 984 buffer_info->dma = 0;
985 buffer_info->length = 0;
986 }
1da177e4 987
23e55a32 988 if (buffer_info->skb) {
1da177e4 989 dev_kfree_skb(buffer_info->skb);
1da177e4
LT		 990 buffer_info->skb = NULL;
991 }
992 }
993
994 size = sizeof(struct ixgb_buffer) * rx_ring->count;
995 memset(rx_ring->buffer_info, 0, size);
996
997 /* Zero out the descriptor ring */
998
999 memset(rx_ring->desc, 0, rx_ring->size);
1000
1001 rx_ring->next_to_clean = 0;
1002 rx_ring->next_to_use = 0;
1003
1004 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1005 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1006}
1007
1008/**
1009 * ixgb_set_mac - Change the Ethernet Address of the NIC
1010 * @netdev: network interface device structure
1011 * @p: pointer to an address structure
1012 *
1013 * Returns 0 on success, negative on failure
1014 **/
1015
1016static int
1017ixgb_set_mac(struct net_device *netdev, void *p)
1018{
8908c6cd 1019 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1020 struct sockaddr *addr = p;
1021
03f83041 1022 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1023 return -EADDRNOTAVAIL;
1024
1025 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1026
1027 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1028
1029 return 0;
1030}
1031
1032/**
1033 * ixgb_set_multi - Multicast and Promiscuous mode set
1034 * @netdev: network interface device structure
1035 *
1036 * The set_multi entry point is called whenever the multicast address
1037 * list or the network interface flags are updated. This routine is
1038 * responsible for configuring the hardware for proper multicast,
1039 * promiscuous mode, and all-multi behavior.
1040 **/
1041
1042static void
1043ixgb_set_multi(struct net_device *netdev)
1044{
8908c6cd 1045 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1046 struct ixgb_hw *hw = &adapter->hw;
1047 struct dev_mc_list *mc_ptr;
222441a6 1048 u32 rctl;
1da177e4
LT		 1049 int i;
1050
1051 /* Check for Promiscuous and All Multicast modes */
1052
1053 rctl = IXGB_READ_REG(hw, RCTL);
1054
03f83041 1055 if (netdev->flags & IFF_PROMISC) {
1da177e4 1056 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
746b9f02 1057 rctl &= ~IXGB_RCTL_VFE;
1da177e4 1058 } else {
746b9f02
PM		 1059 if (netdev->flags & IFF_ALLMULTI) {
1060 rctl |= IXGB_RCTL_MPE;
1061 rctl &= ~IXGB_RCTL_UPE;
1062 } else {
1063 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1064 }
78ed11a5 1065 rctl |= IXGB_RCTL_VFE;
1da177e4
LT		 1066 }
1067
03f83041 1068 if (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1069 rctl |= IXGB_RCTL_MPE;
1070 IXGB_WRITE_REG(hw, RCTL, rctl);
1071 } else {
222441a6 1072 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1073 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1074
1075 IXGB_WRITE_REG(hw, RCTL, rctl);
1076
0060c072
JB		 1077 for (i = 0, mc_ptr = netdev->mc_list;
1078 mc_ptr;
1079 i++, mc_ptr = mc_ptr->next)
1da177e4 1080 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
0060c072 1081 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1da177e4
LT		 1082
1083 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1084 }
1085}
1086
1087/**
1088 * ixgb_watchdog - Timer Call-back
1089 * @data: pointer to netdev cast into an unsigned long
1090 **/
1091
1092static void
1093ixgb_watchdog(unsigned long data)
1094{
1095 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1096 struct net_device *netdev = adapter->netdev;
1097 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1098
1099 ixgb_check_for_link(&adapter->hw);
1100
1101 if (ixgb_check_for_bad_link(&adapter->hw)) {
1102 /* force the reset path */
1103 netif_stop_queue(netdev);
1104 }
1105
03f83041
JB		 1106 if (adapter->hw.link_up) {
1107 if (!netif_carrier_ok(netdev)) {
ec9c3f5d
AK		 1108 DPRINTK(LINK, INFO,
1109 "NIC Link is Up 10000 Mbps Full Duplex\n");
1da177e4
LT		 1110 adapter->link_speed = 10000;
1111 adapter->link_duplex = FULL_DUPLEX;
1112 netif_carrier_on(netdev);
1113 netif_wake_queue(netdev);
1114 }
1115 } else {
03f83041 1116 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1117 adapter->link_speed = 0;
1118 adapter->link_duplex = 0;
ec9c3f5d 1119 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1da177e4
LT		 1120 netif_carrier_off(netdev);
1121 netif_stop_queue(netdev);
1122
1123 }
1124 }
1125
1126 ixgb_update_stats(adapter);
1127
03f83041
JB		 1128 if (!netif_carrier_ok(netdev)) {
1129 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1130 /* We've lost link, so the controller stops DMA,
1131 * but we've got queued Tx work that's never going
1132 * to get done, so reset controller to flush Tx.
1133 * (Do the reset outside of interrupt context). */
1134 schedule_work(&adapter->tx_timeout_task);
1135 }
1136 }
1137
1138 /* Force detection of hung controller every watchdog period */
446490ca 1139 adapter->detect_tx_hung = true;
1da177e4
LT		 1140
1141 /* generate an interrupt to force clean up of any stragglers */
1142 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1143
1144 /* Reset the timer */
1145 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1146}
1147
1148#define IXGB_TX_FLAGS_CSUM 0x00000001
1149#define IXGB_TX_FLAGS_VLAN 0x00000002
1150#define IXGB_TX_FLAGS_TSO 0x00000004
1151
235949d1 1152static int
1da177e4
LT		 1153ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1154{
1da177e4
LT		 1155 struct ixgb_context_desc *context_desc;
1156 unsigned int i;
222441a6
JP		 1157 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1158 u16 ipcse, tucse, mss;
1da177e4
LT		 1159 int err;
1160
89114afd 1161 if (likely(skb_is_gso(skb))) {
adc54139 1162 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1163 struct iphdr *iph;
1164
1da177e4
LT		 1165 if (skb_header_cloned(skb)) {
1166 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1167 if (err)
1168 return err;
1169 }
1170
ab6a5bb6 1171 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1172 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1173 iph = ip_hdr(skb);
1174 iph->tot_len = 0;
1175 iph->check = 0;
aa8223c7
ACM		 1176 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1177 iph->daddr, 0,
1178 IPPROTO_TCP, 0);
bbe735e4 1179 ipcss = skb_network_offset(skb);
eddc9ec5 1180 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1181 ipcse = skb_transport_offset(skb) - 1;
1182 tucss = skb_transport_offset(skb);
aa8223c7 1183 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1184 tucse = 0;
1185
1186 i = adapter->tx_ring.next_to_use;
1187 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1188 buffer_info = &adapter->tx_ring.buffer_info[i];
1189 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1190
1191 context_desc->ipcss = ipcss;
1192 context_desc->ipcso = ipcso;
1193 context_desc->ipcse = cpu_to_le16(ipcse);
1194 context_desc->tucss = tucss;
1195 context_desc->tucso = tucso;
1196 context_desc->tucse = cpu_to_le16(tucse);
1197 context_desc->mss = cpu_to_le16(mss);
1198 context_desc->hdr_len = hdr_len;
1199 context_desc->status = 0;
1200 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1201 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1202 | IXGB_CONTEXT_DESC_CMD_TSE
1203 | IXGB_CONTEXT_DESC_CMD_IP
1204 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1205 | IXGB_CONTEXT_DESC_CMD_IDE
1206 | (skb->len - (hdr_len)));
1207
06c2f9ec 1208
03f83041 1209 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1210 adapter->tx_ring.next_to_use = i;
1211
1212 return 1;
1213 }
1da177e4
LT		 1214
1215 return 0;
1216}
1217
446490ca 1218static bool
1da177e4
LT		 1219ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1220{
1221 struct ixgb_context_desc *context_desc;
1222 unsigned int i;
222441a6 1223 u8 css, cso;
1da177e4 1224
03f83041 1225 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1226 struct ixgb_buffer *buffer_info;
ea2ae17d 1227 css = skb_transport_offset(skb);
ff1dcadb 1228 cso = css + skb->csum_offset;
1da177e4
LT		 1229
1230 i = adapter->tx_ring.next_to_use;
1231 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1232 buffer_info = &adapter->tx_ring.buffer_info[i];
1233 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1234
1235 context_desc->tucss = css;
1236 context_desc->tucso = cso;
1237 context_desc->tucse = 0;
1238 /* zero out any previously existing data in one instruction */
222441a6 1239 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1240 context_desc->status = 0;
1241 context_desc->hdr_len = 0;
1242 context_desc->mss = 0;
1243 context_desc->cmd_type_len =
1244 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1245 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1246
03f83041 1247 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1248 adapter->tx_ring.next_to_use = i;
1249
446490ca 1250 return true;
1da177e4
LT		 1251 }
1252
446490ca 1253 return false;
1da177e4
LT		 1254}
1255
1256#define IXGB_MAX_TXD_PWR 14
1257#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1258
235949d1 1259static int
1da177e4
LT		 1260ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1261 unsigned int first)
1262{
1263 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1264 struct ixgb_buffer *buffer_info;
1265 int len = skb->len;
1266 unsigned int offset = 0, size, count = 0, i;
5d927853 1267 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1268
1269 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1270 unsigned int f;
ac79c82e 1271
1da177e4
LT		 1272 len -= skb->data_len;
1273
1274 i = tx_ring->next_to_use;
1275
9a432992 1276 while (len) {
1da177e4 1277 buffer_info = &tx_ring->buffer_info[i];
709cf018 1278 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1279 /* Workaround for premature desc write-backs
1280 * in TSO mode. Append 4-byte sentinel desc */
1281 if (unlikely(mss && !nr_frags && size == len && size > 8))
1282 size -= 4;
1283
1da177e4 1284 buffer_info->length = size;
adc54139 1285 WARN_ON(buffer_info->dma != 0);
34336635 1286 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1287 buffer_info->dma =
1288 pci_map_single(adapter->pdev,
1289 skb->data + offset,
1290 size,
1291 PCI_DMA_TODEVICE);
1dfdd7df 1292 buffer_info->next_to_watch = 0;
1da177e4
LT		 1293
1294 len -= size;
1295 offset += size;
1296 count++;
03f83041 1297 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1298 }
1299
1459336d 1300 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 1301 struct skb_frag_struct *frag;
1302
1303 frag = &skb_shinfo(skb)->frags[f];
1304 len = frag->size;
1305 offset = 0;
1306
9a432992 1307 while (len) {
1da177e4 1308 buffer_info = &tx_ring->buffer_info[i];
709cf018 1309 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1310
1311 /* Workaround for premature desc write-backs
1312 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1313 if (unlikely(mss && (f == (nr_frags - 1))
1314 && size == len && size > 8))
5d927853
JB		 1315 size -= 4;
1316
1da177e4 1317 buffer_info->length = size;
34336635 1318 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1319 buffer_info->dma =
1320 pci_map_page(adapter->pdev,
1321 frag->page,
1322 frag->page_offset + offset,
1323 size,
1324 PCI_DMA_TODEVICE);
1dfdd7df 1325 buffer_info->next_to_watch = 0;
1da177e4
LT		 1326
1327 len -= size;
1328 offset += size;
1329 count++;
03f83041 1330 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1331 }
1332 }
1333 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1334 tx_ring->buffer_info[i].skb = skb;
1335 tx_ring->buffer_info[first].next_to_watch = i;
1336
1337 return count;
1338}
1339
235949d1 1340static void
1da177e4
LT		 1341ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1342{
1343 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1344 struct ixgb_tx_desc *tx_desc = NULL;
1345 struct ixgb_buffer *buffer_info;
222441a6
JP		 1346 u32 cmd_type_len = adapter->tx_cmd_type;
1347 u8 status = 0;
1348 u8 popts = 0;
1da177e4
LT		 1349 unsigned int i;
1350
03f83041 1351 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1352 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1353 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1354 }
1355
03f83041 1356 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1357 popts |= IXGB_TX_DESC_POPTS_TXSM;
1358
03f83041 1359 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1360 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1361
1362 i = tx_ring->next_to_use;
1363
9a432992 1364 while (count--) {
1da177e4
LT		 1365 buffer_info = &tx_ring->buffer_info[i];
1366 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1367 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1368 tx_desc->cmd_type_len =
1369 cpu_to_le32(cmd_type_len | buffer_info->length);
1370 tx_desc->status = status;
1371 tx_desc->popts = popts;
1372 tx_desc->vlan = cpu_to_le16(vlan_id);
1373
03f83041 1374 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1375 }
1376
0060c072
JB		 1377 tx_desc->cmd_type_len |=
1378 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1379
1380 /* Force memory writes to complete before letting h/w
1381 * know there are new descriptors to fetch. (Only
1382 * applicable for weak-ordered memory model archs,
1383 * such as IA-64). */
1384 wmb();
1385
1386 tx_ring->next_to_use = i;
1387 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1388}
1389
dfd341e4
JB		 1390static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1391{
1392 struct ixgb_adapter *adapter = netdev_priv(netdev);
1393 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1394
1395 netif_stop_queue(netdev);
1396 /* Herbert's original patch had:
1397 * smp_mb__after_netif_stop_queue();
1398 * but since that doesn't exist yet, just open code it. */
1399 smp_mb();
1400
1401 /* We need to check again in a case another CPU has just
1402 * made room available. */
1403 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1404 return -EBUSY;
1405
1406 /* A reprieve! */
1407 netif_start_queue(netdev);
1408 ++adapter->restart_queue;
1409 return 0;
1410}
1411
1412static int ixgb_maybe_stop_tx(struct net_device *netdev,
1413 struct ixgb_desc_ring *tx_ring, int size)
1414{
1415 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1416 return 0;
1417 return __ixgb_maybe_stop_tx(netdev, size);
1418}
1419
1420
1da177e4
LT		 1421/* Tx Descriptors needed, worst case */
1422#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1423 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1424#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1425 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1426 + 1 /* one more needed for sentinel TSO workaround */
1da177e4
LT		 1427
1428static int
1429ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1430{
8908c6cd 1431 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1432 unsigned int first;
1433 unsigned int tx_flags = 0;
1da177e4
LT		 1434 int vlan_id = 0;
1435 int tso;
1436
bab2bce7
JB		 1437 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1438 dev_kfree_skb(skb);
1439 return NETDEV_TX_OK;
1440 }
1441
03f83041 1442 if (skb->len <= 0) {
c2199340 1443 dev_kfree_skb(skb);
1da177e4
LT		 1444 return 0;
1445 }
1446
dfd341e4 1447 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1448 DESC_NEEDED)))
f017f14b 1449 return NETDEV_TX_BUSY;
1da177e4 1450
03f83041 1451 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1da177e4
LT		 1452 tx_flags |= IXGB_TX_FLAGS_VLAN;
1453 vlan_id = vlan_tx_tag_get(skb);
1454 }
1455
1456 first = adapter->tx_ring.next_to_use;
0060c072 1457
1da177e4
LT		 1458 tso = ixgb_tso(adapter, skb);
1459 if (tso < 0) {
c2199340 1460 dev_kfree_skb(skb);
1da177e4
LT		 1461 return NETDEV_TX_OK;
1462 }
1463
96f9c2e2 1464 if (likely(tso))
1da177e4 1465 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1466 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1467 tx_flags |= IXGB_TX_FLAGS_CSUM;
1468
1469 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1470 tx_flags);
1471
1472 netdev->trans_start = jiffies;
1473
f017f14b 1474 /* Make sure there is space in the ring for the next send. */
dfd341e4 1475 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
f017f14b 1476
f017f14b 1477 return NETDEV_TX_OK;
1da177e4
LT		 1478}
1479
1480/**
1481 * ixgb_tx_timeout - Respond to a Tx Hang
1482 * @netdev: network interface device structure
1483 **/
1484
1485static void
1486ixgb_tx_timeout(struct net_device *netdev)
1487{
8908c6cd 1488 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1489
1490 /* Do the reset outside of interrupt context */
1491 schedule_work(&adapter->tx_timeout_task);
1492}
1493
1494static void
c4028958 1495ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1496{
c4028958
DH		 1497 struct ixgb_adapter *adapter =
1498 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1499
9b8118df 1500 adapter->tx_timeout_count++;
446490ca 1501 ixgb_down(adapter, true);
1da177e4
LT		 1502 ixgb_up(adapter);
1503}
1504
1505/**
1506 * ixgb_get_stats - Get System Network Statistics
1507 * @netdev: network interface device structure
1508 *
1509 * Returns the address of the device statistics structure.
1510 * The statistics are actually updated from the timer callback.
1511 **/
1512
1513static struct net_device_stats *
1514ixgb_get_stats(struct net_device *netdev)
1515{
8908c6cd 1516 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1517
1518 return &adapter->net_stats;
1519}
1520
1521/**
1522 * ixgb_change_mtu - Change the Maximum Transfer Unit
1523 * @netdev: network interface device structure
1524 * @new_mtu: new value for maximum frame size
1525 *
1526 * Returns 0 on success, negative on failure
1527 **/
1528
1529static int
1530ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1531{
8908c6cd 1532 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1533 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1534 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1535
a65a604a
JB		 1536 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1537 if ((new_mtu < 68) ||
1538 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
ec9c3f5d 1539 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1540 return -EINVAL;
1541 }
1542
b5ca88eb
JB		 1543 if (old_max_frame == max_frame)
1544 return 0;
1545
1546 if (netif_running(netdev))
1547 ixgb_down(adapter, true);
1548
a3dc3da0 1549 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1550
1551 netdev->mtu = new_mtu;
1552
b5ca88eb 1553 if (netif_running(netdev))
1da177e4 1554 ixgb_up(adapter);
1da177e4
LT		 1555
1556 return 0;
1557}
1558
1559/**
1560 * ixgb_update_stats - Update the board statistics counters.
1561 * @adapter: board private structure
1562 **/
1563
1564void
1565ixgb_update_stats(struct ixgb_adapter *adapter)
1566{
5633684d 1567 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1568 struct pci_dev *pdev = adapter->pdev;
1569
1570 /* Prevent stats update while adapter is being reset */
81b1955e 1571 if (pci_channel_offline(pdev))
01748fbb 1572 return;
5633684d 1573
03f83041 1574 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
5633684d
MC		 1575 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1576 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1577 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1578 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1579 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1580
1581 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1582 /* fix up multicast stats by removing broadcasts */
03f83041 1583 if (multi >= bcast)
7b89178d 1584 multi -= bcast;
0060c072 1585
5633684d
MC		 1586 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1587 adapter->stats.mprch += (multi >> 32);
0060c072 1588 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1589 adapter->stats.bprch += bcast_h;
1590 } else {
1591 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1592 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1593 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1594 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1595 }
1da177e4
LT		 1596 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1597 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1598 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1599 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1600 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1601 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1602 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1603 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1604 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1605 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1606 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1607 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1608 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1609 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1610 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1611 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1612 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1613 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1614 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1615 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1616 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1617 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1618 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1619 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1620 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1621 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1622 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1623 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1624 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1625 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1626 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1627 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1628 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1629 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1630 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1631 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1632 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1633 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1634 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1635 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1636 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1637 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1638 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1639 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1640 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1641 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1642 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1643 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1644 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1645 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1646 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1647 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1648 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1649 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1650 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1651 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1652
1653 /* Fill out the OS statistics structure */
1654
1655 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1656 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1657 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1658 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1659 adapter->net_stats.multicast = adapter->stats.mprcl;
1660 adapter->net_stats.collisions = 0;
1661
1662 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1663 * with a length in the type/len field */
1664 adapter->net_stats.rx_errors =
1665 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1666 adapter->stats.ruc +
1667 adapter->stats.roc /*+ adapter->stats.rlec */ +
1668 adapter->stats.icbc +
1669 adapter->stats.ecbc + adapter->stats.mpc;
1670
1da177e4
LT		 1671 /* see above
1672 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1673 */
1674
1675 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1676 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1677 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1678 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1679
1680 adapter->net_stats.tx_errors = 0;
1681 adapter->net_stats.rx_frame_errors = 0;
1682 adapter->net_stats.tx_aborted_errors = 0;
1683 adapter->net_stats.tx_carrier_errors = 0;
1684 adapter->net_stats.tx_fifo_errors = 0;
1685 adapter->net_stats.tx_heartbeat_errors = 0;
1686 adapter->net_stats.tx_window_errors = 0;
1687}
1688
1689#define IXGB_MAX_INTR 10
1690/**
1691 * ixgb_intr - Interrupt Handler
1692 * @irq: interrupt number
1693 * @data: pointer to a network interface device structure
1da177e4
LT		 1694 **/
1695
1696static irqreturn_t
7d12e780 1697ixgb_intr(int irq, void *data)
1da177e4
LT		 1698{
1699 struct net_device *netdev = data;
8908c6cd 1700 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1701 struct ixgb_hw *hw = &adapter->hw;
222441a6 1702 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4 1703
03f83041 1704 if (unlikely(!icr))
1da177e4
LT		 1705 return IRQ_NONE; /* Not our interrupt */
1706
bab2bce7
JB		 1707 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1708 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1709 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4 1710
bea3348e 1711 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1da177e4 1712
0060c072 1713 /* Disable interrupts and register for poll. The flush
1da177e4
LT		 1714 of the posted write is intentionally left out.
1715 */
1716
1da177e4 1717 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
bea3348e 1718 __netif_rx_schedule(netdev, &adapter->napi);
1da177e4 1719 }
1da177e4
LT		 1720 return IRQ_HANDLED;
1721}
1722
1da177e4
LT		 1723/**
1724 * ixgb_clean - NAPI Rx polling callback
1725 * @adapter: board private structure
1726 **/
1727
1728static int
bea3348e 1729ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1730{
bea3348e
SH		 1731 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1732 struct net_device *netdev = adapter->netdev;
1da177e4
LT		 1733 int work_done = 0;
1734
53e52c72 1735 ixgb_clean_tx_irq(adapter);
bea3348e 1736 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1737
53e52c72
DM		 1738 /* If budget not fully consumed, exit the polling mode */
1739 if (work_done < budget) {
bea3348e 1740 netif_rx_complete(netdev, napi);
72ab5195
JB		 1741 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1742 ixgb_irq_enable(adapter);
1da177e4
LT		 1743 }
1744
bea3348e 1745 return work_done;
1da177e4 1746}
1da177e4
LT		 1747
1748/**
1749 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1750 * @adapter: board private structure
1751 **/
1752
446490ca 1753static bool
1da177e4
LT		 1754ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1755{
1756 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1757 struct net_device *netdev = adapter->netdev;
1758 struct ixgb_tx_desc *tx_desc, *eop_desc;
1759 struct ixgb_buffer *buffer_info;
1760 unsigned int i, eop;
446490ca 1761 bool cleaned = false;
1da177e4
LT		 1762
1763 i = tx_ring->next_to_clean;
1764 eop = tx_ring->buffer_info[i].next_to_watch;
1765 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1766
9a432992 1767 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1768
446490ca 1769 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1770 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1771 buffer_info = &tx_ring->buffer_info[i];
1772
0060c072
JB		 1773 if (tx_desc->popts &
1774 (IXGB_TX_DESC_POPTS_TXSM |
1775 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1776 adapter->hw_csum_tx_good++;
1777
1778 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1779
222441a6 1780 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1781
1782 cleaned = (i == eop);
03f83041 1783 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1784 }
1785
1786 eop = tx_ring->buffer_info[i].next_to_watch;
1787 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1788 }
1789
1790 tx_ring->next_to_clean = i;
1791
0f8ecbad
JB		 1792 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1793 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1794 /* Make sure that anybody stopping the queue after this
1795 * sees the new next_to_clean. */
1796 smp_mb();
1797
1798 if (netif_queue_stopped(netdev) &&
1799 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1800 netif_wake_queue(netdev);
0f8ecbad
JB		 1801 ++adapter->restart_queue;
1802 }
1da177e4 1803 }
1da177e4 1804
03f83041 1805 if (adapter->detect_tx_hung) {
1da177e4
LT		 1806 /* detect a transmit hang in hardware, this serializes the
1807 * check with the clearing of time_stamp and movement of i */
446490ca 1808 adapter->detect_tx_hung = false;
9b8118df
AK		 1809 if (tx_ring->buffer_info[eop].dma &&
1810 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1811 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1812 IXGB_STATUS_TXOFF)) {
1813 /* detected Tx unit hang */
1814 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1815 " TDH <%x>\n"
1816 " TDT <%x>\n"
1817 " next_to_use <%x>\n"
1818 " next_to_clean <%x>\n"
1819 "buffer_info[next_to_clean]\n"
1820 " time_stamp <%lx>\n"
1821 " next_to_watch <%x>\n"
1822 " jiffies <%lx>\n"
1823 " next_to_watch.status <%x>\n",
1824 IXGB_READ_REG(&adapter->hw, TDH),
1825 IXGB_READ_REG(&adapter->hw, TDT),
1826 tx_ring->next_to_use,
1827 tx_ring->next_to_clean,
1828 tx_ring->buffer_info[eop].time_stamp,
1829 eop,
1830 jiffies,
1831 eop_desc->status);
1da177e4 1832 netif_stop_queue(netdev);
9b8118df 1833 }
1da177e4
LT		 1834 }
1835
1836 return cleaned;
1837}
1838
1839/**
1840 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1841 * @adapter: board private structure
1842 * @rx_desc: receive descriptor
1843 * @sk_buff: socket buffer with received data
1844 **/
1845
235949d1 1846static void
1da177e4 1847ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1848 struct ixgb_rx_desc *rx_desc,
1849 struct sk_buff *skb)
1da177e4
LT		 1850{
1851 /* Ignore Checksum bit is set OR
1852 * TCP Checksum has not been calculated
1853 */
03f83041 1854 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4
LT		 1855 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1856 skb->ip_summed = CHECKSUM_NONE;
1857 return;
1858 }
1859
1860 /* At this point we know the hardware did the TCP checksum */
1861 /* now look at the TCP checksum error bit */
03f83041 1862 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4
LT		 1863 /* let the stack verify checksum errors */
1864 skb->ip_summed = CHECKSUM_NONE;
1865 adapter->hw_csum_rx_error++;
1866 } else {
1867 /* TCP checksum is good */
1868 skb->ip_summed = CHECKSUM_UNNECESSARY;
1869 adapter->hw_csum_rx_good++;
1870 }
1871}
1872
1873/**
1874 * ixgb_clean_rx_irq - Send received data up the network stack,
1875 * @adapter: board private structure
1876 **/
1877
446490ca 1878static bool
1da177e4 1879ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1da177e4
LT		 1880{
1881 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1882 struct net_device *netdev = adapter->netdev;
1883 struct pci_dev *pdev = adapter->pdev;
1884 struct ixgb_rx_desc *rx_desc, *next_rxd;
1885 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1886 u32 length;
1da177e4 1887 unsigned int i, j;
fc2d14e3 1888 int cleaned_count = 0;
446490ca 1889 bool cleaned = false;
1da177e4
LT		 1890
1891 i = rx_ring->next_to_clean;
1892 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1893 buffer_info = &rx_ring->buffer_info[i];
1894
9a432992 1895 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
fc2d14e3 1896 struct sk_buff *skb;
f404de1c 1897 u8 status;
1da177e4 1898
03f83041 1899 if (*work_done >= work_to_do)
1da177e4
LT		 1900 break;
1901
1902 (*work_done)++;
f404de1c 1903 status = rx_desc->status;
1da177e4 1904 skb = buffer_info->skb;
1dfdd7df 1905 buffer_info->skb = NULL;
f404de1c 1906
fc2d14e3 1907 prefetch(skb->data - NET_IP_ALIGN);
1da177e4 1908
03f83041 1909 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 1910 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1911 prefetch(next_rxd);
1912
03f83041 1913 if ((j = i + 1) == rx_ring->count) j = 0;
1da177e4
LT		 1914 next2_buffer = &rx_ring->buffer_info[j];
1915 prefetch(next2_buffer);
1916
1917 next_buffer = &rx_ring->buffer_info[i];
1da177e4 1918
446490ca 1919 cleaned = true;
fc2d14e3 1920 cleaned_count++;
1da177e4
LT		 1921
1922 pci_unmap_single(pdev,
1923 buffer_info->dma,
1924 buffer_info->length,
1925 PCI_DMA_FROMDEVICE);
fc2d14e3 1926 buffer_info->dma = 0;
1da177e4
LT		 1927
1928 length = le16_to_cpu(rx_desc->length);
fc2d14e3 1929 rx_desc->length = 0;
1da177e4 1930
03f83041 1931 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 1932
1933 /* All receives must fit into a single buffer */
1934
1935 IXGB_DBG("Receive packet consumed multiple buffers "
1936 "length<%x>\n", length);
1937
1938 dev_kfree_skb_irq(skb);
f404de1c 1939 goto rxdesc_done;
1da177e4
LT		 1940 }
1941
0060c072
JB		 1942 if (unlikely(rx_desc->errors &
1943 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
1944 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 1945 dev_kfree_skb_irq(skb);
f404de1c 1946 goto rxdesc_done;
1da177e4
LT		 1947 }
1948
6b900bb4
AK		 1949 /* code added for copybreak, this should improve
1950 * performance for small packets with large amounts
1951 * of reassembly being done in the stack */
d9fed18b 1952 if (length < copybreak) {
6b900bb4 1953 struct sk_buff *new_skb =
5791704f 1954 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
6b900bb4
AK		 1955 if (new_skb) {
1956 skb_reserve(new_skb, NET_IP_ALIGN);
27d7ff46
ACM		 1957 skb_copy_to_linear_data_offset(new_skb,
1958 -NET_IP_ALIGN,
1959 (skb->data -
1960 NET_IP_ALIGN),
1961 (length +
1962 NET_IP_ALIGN));
6b900bb4
AK		 1963 /* save the skb in buffer_info as good */
1964 buffer_info->skb = skb;
1965 skb = new_skb;
1966 }
1967 }
1968 /* end copybreak code */
1969
1da177e4
LT		 1970 /* Good Receive */
1971 skb_put(skb, length);
1972
1973 /* Receive Checksum Offload */
1974 ixgb_rx_checksum(adapter, rx_desc, skb);
1975
1976 skb->protocol = eth_type_trans(skb, netdev);
03f83041 1977 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 1978 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
0060c072 1979 le16_to_cpu(rx_desc->special));
1da177e4
LT		 1980 } else {
1981 netif_receive_skb(skb);
1982 }
1da177e4 1983
f404de1c
MC		 1984rxdesc_done:
1985 /* clean up descriptor, might be written over by hw */
1da177e4 1986 rx_desc->status = 0;
1da177e4 1987
fc2d14e3
JB		 1988 /* return some buffers to hardware, one at a time is too slow */
1989 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
1990 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1991 cleaned_count = 0;
1992 }
1993
f404de1c 1994 /* use prefetched values */
1da177e4
LT		 1995 rx_desc = next_rxd;
1996 buffer_info = next_buffer;
1997 }
1998
1999 rx_ring->next_to_clean = i;
2000
fc2d14e3
JB		 2001 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2002 if (cleaned_count)
2003 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1da177e4
LT		 2004
2005 return cleaned;
2006}
2007
2008/**
2009 * ixgb_alloc_rx_buffers - Replace used receive buffers
2010 * @adapter: address of board private structure
2011 **/
2012
2013static void
fc2d14e3 2014ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
1da177e4
LT		 2015{
2016 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2017 struct net_device *netdev = adapter->netdev;
2018 struct pci_dev *pdev = adapter->pdev;
2019 struct ixgb_rx_desc *rx_desc;
2020 struct ixgb_buffer *buffer_info;
2021 struct sk_buff *skb;
2022 unsigned int i;
1da177e4
LT		 2023 long cleancount;
2024
2025 i = rx_ring->next_to_use;
2026 buffer_info = &rx_ring->buffer_info[i];
2027 cleancount = IXGB_DESC_UNUSED(rx_ring);
2028
1da177e4 2029
41639fed 2030 /* leave three descriptors unused */
fc2d14e3 2031 while (--cleancount > 2 && cleaned_count--) {
1dfdd7df 2032 /* recycle! its good for you */
69c7a940
AK		 2033 skb = buffer_info->skb;
2034 if (skb) {
1dfdd7df
AK		 2035 skb_trim(skb, 0);
2036 goto map_skb;
2037 }
1da177e4 2038
69c7a940
AK		 2039 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2040 + NET_IP_ALIGN);
1dfdd7df 2041 if (unlikely(!skb)) {
1da177e4 2042 /* Better luck next round */
1dfdd7df 2043 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2044 break;
2045 }
2046
2047 /* Make buffer alignment 2 beyond a 16 byte boundary
2048 * this will result in a 16 byte aligned IP header after
2049 * the 14 byte MAC header is removed
2050 */
2051 skb_reserve(skb, NET_IP_ALIGN);
2052
1da177e4
LT		 2053 buffer_info->skb = skb;
2054 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df
AK		 2055map_skb:
2056 buffer_info->dma = pci_map_single(pdev,
2057 skb->data,
2058 adapter->rx_buffer_len,
2059 PCI_DMA_FROMDEVICE);
1da177e4 2060
1dfdd7df 2061 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2062 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2063 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2064 * this is the rest of the workaround for h/w double
41639fed
MC		 2065 * writeback. */
2066 rx_desc->status = 0;
1da177e4 2067
1da177e4 2068
03f83041 2069 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2070 buffer_info = &rx_ring->buffer_info[i];
2071 }
2072
1dfdd7df
AK		 2073 if (likely(rx_ring->next_to_use != i)) {
2074 rx_ring->next_to_use = i;
2075 if (unlikely(i-- == 0))
2076 i = (rx_ring->count - 1);
2077
2078 /* Force memory writes to complete before letting h/w
2079 * know there are new descriptors to fetch. (Only
2080 * applicable for weak-ordered memory model archs, such
2081 * as IA-64). */
2082 wmb();
2083 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2084 }
1da177e4
LT		 2085}
2086
2087/**
2088 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
0060c072 2089 *
1da177e4
LT		 2090 * @param netdev network interface device structure
2091 * @param grp indicates to enable or disable tagging/stripping
2092 **/
2093static void
2094ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2095{
8908c6cd 2096 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2097 u32 ctrl, rctl;
1da177e4
LT		 2098
2099 ixgb_irq_disable(adapter);
2100 adapter->vlgrp = grp;
2101
03f83041 2102 if (grp) {
1da177e4
LT		 2103 /* enable VLAN tag insert/strip */
2104 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2105 ctrl |= IXGB_CTRL0_VME;
2106 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2107
2108 /* enable VLAN receive filtering */
2109
2110 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
1da177e4
LT		 2111 rctl &= ~IXGB_RCTL_CFIEN;
2112 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2113 } else {
2114 /* disable VLAN tag insert/strip */
2115
2116 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2117 ctrl &= ~IXGB_CTRL0_VME;
2118 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
1da177e4
LT		 2119 }
2120
bab2bce7
JB		 2121 /* don't enable interrupts unless we are UP */
2122 if (adapter->netdev->flags & IFF_UP)
2123 ixgb_irq_enable(adapter);
1da177e4
LT		 2124}
2125
2126static void
222441a6 2127ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2128{
8908c6cd 2129 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2130 u32 vfta, index;
1da177e4
LT		 2131
2132 /* add VID to filter table */
2133
2134 index = (vid >> 5) & 0x7F;
2135 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2136 vfta |= (1 << (vid & 0x1F));
2137 ixgb_write_vfta(&adapter->hw, index, vfta);
2138}
2139
2140static void
222441a6 2141ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2142{
8908c6cd 2143 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2144 u32 vfta, index;
1da177e4
LT		 2145
2146 ixgb_irq_disable(adapter);
2147
5c15bdec 2148 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 2149
bab2bce7
JB		 2150 /* don't enable interrupts unless we are UP */
2151 if (adapter->netdev->flags & IFF_UP)
2152 ixgb_irq_enable(adapter);
1da177e4 2153
bab2bce7 2154 /* remove VID from filter table */
1da177e4
LT		 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
2162static void
2163ixgb_restore_vlan(struct ixgb_adapter *adapter)
2164{
2165 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2166
03f83041 2167 if (adapter->vlgrp) {
222441a6 2168 u16 vid;
1459336d 2169 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
03f83041 2170 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2171 continue;
2172 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2173 }
2174 }
2175}
2176
1da177e4
LT		 2177#ifdef CONFIG_NET_POLL_CONTROLLER
2178/*
2179 * Polling 'interrupt' - used by things like netconsole to send skbs
2180 * without having to re-enable interrupts. It's not called while
2181 * the interrupt routine is executing.
2182 */
2183
2184static void ixgb_netpoll(struct net_device *dev)
2185{
f990b426 2186 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2187
1da177e4 2188 disable_irq(adapter->pdev->irq);
7d12e780 2189 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2190 enable_irq(adapter->pdev->irq);
2191}
2192#endif
2193
01748fbb
LV		 2194/**
2195 * ixgb_io_error_detected() - called when PCI error is detected
2196 * @pdev pointer to pci device with error
2197 * @state pci channel state after error
2198 *
2199 * This callback is called by the PCI subsystem whenever
2200 * a PCI bus error is detected.
2201 */
0060c072
JB		 2202static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2203 enum pci_channel_state state)
01748fbb
LV		 2204{
2205 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2206 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2207
03f83041 2208 if (netif_running(netdev))
446490ca 2209 ixgb_down(adapter, true);
01748fbb
LV		 2210
2211 pci_disable_device(pdev);
2212
2213 /* Request a slot reset. */
2214 return PCI_ERS_RESULT_NEED_RESET;
2215}
2216
2217/**
2218 * ixgb_io_slot_reset - called after the pci bus has been reset.
2219 * @pdev pointer to pci device with error
2220 *
52035bdb 2221 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2222 * Basically, this tries to restart the card from scratch.
2223 * This is a shortened version of the device probe/discovery code,
2224 * it resembles the first-half of the ixgb_probe() routine.
2225 */
0060c072 2226static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2227{
2228 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2229 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2230
03f83041 2231 if (pci_enable_device(pdev)) {
01748fbb
LV		 2232 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2233 return PCI_ERS_RESULT_DISCONNECT;
2234 }
2235
2236 /* Perform card reset only on one instance of the card */
2237 if (0 != PCI_FUNC (pdev->devfn))
2238 return PCI_ERS_RESULT_RECOVERED;
2239
2240 pci_set_master(pdev);
2241
2242 netif_carrier_off(netdev);
2243 netif_stop_queue(netdev);
2244 ixgb_reset(adapter);
2245
2246 /* Make sure the EEPROM is good */
03f83041 2247 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
01748fbb
LV		 2248 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2249 return PCI_ERS_RESULT_DISCONNECT;
2250 }
2251 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2252 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2253
03f83041 2254 if (!is_valid_ether_addr(netdev->perm_addr)) {
01748fbb
LV		 2255 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2256 return PCI_ERS_RESULT_DISCONNECT;
2257 }
2258
2259 return PCI_ERS_RESULT_RECOVERED;
2260}
2261
2262/**
2263 * ixgb_io_resume - called when its OK to resume normal operations
2264 * @pdev pointer to pci device with error
2265 *
2266 * The error recovery driver tells us that its OK to resume
2267 * normal operation. Implementation resembles the second-half
2268 * of the ixgb_probe() routine.
2269 */
0060c072 2270static void ixgb_io_resume(struct pci_dev *pdev)
01748fbb
LV		 2271{
2272 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2273 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2274
2275 pci_set_master(pdev);
2276
03f83041
JB		 2277 if (netif_running(netdev)) {
2278 if (ixgb_up(adapter)) {
01748fbb
LV		 2279 printk ("ixgb: can't bring device back up after reset\n");
2280 return;
2281 }
2282 }
2283
2284 netif_device_attach(netdev);
2285 mod_timer(&adapter->watchdog_timer, jiffies);
2286}
2287
1da177e4 2288/* ixgb_main.c */
Clone of davem's net-next-2.6 tree