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[mirror_ubuntu-bionic-kernel.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
e539e466
JB		 384 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, BAR_0),
385 pci_resource_len(pdev, BAR_0));
386 if (!adapter->hw.hw_addr) {
1da177e4
LT		 387 err = -EIO;
388 goto err_ioremap;
389 }
390
1459336d 391 for (i = BAR_1; i <= BAR_5; i++) {
03f83041 392 if (pci_resource_len(pdev, i) == 0)
1da177e4 393 continue;
03f83041 394 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 395 adapter->hw.io_base = pci_resource_start(pdev, i);
396 break;
397 }
398 }
399
400 netdev->open = &ixgb_open;
401 netdev->stop = &ixgb_close;
402 netdev->hard_start_xmit = &ixgb_xmit_frame;
403 netdev->get_stats = &ixgb_get_stats;
404 netdev->set_multicast_list = &ixgb_set_multi;
405 netdev->set_mac_address = &ixgb_set_mac;
406 netdev->change_mtu = &ixgb_change_mtu;
407 ixgb_set_ethtool_ops(netdev);
408 netdev->tx_timeout = &ixgb_tx_timeout;
9b8118df 409 netdev->watchdog_timeo = 5 * HZ;
bea3348e 410 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4
LT		 411 netdev->vlan_rx_register = ixgb_vlan_rx_register;
412 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
413 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
414#ifdef CONFIG_NET_POLL_CONTROLLER
415 netdev->poll_controller = ixgb_netpoll;
416#endif
417
0eb5a34c 418 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 419
420 adapter->bd_number = cards_found;
421 adapter->link_speed = 0;
422 adapter->link_duplex = 0;
423
424 /* setup the private structure */
425
9e7bd330
JB		 426 err = ixgb_sw_init(adapter);
427 if (err)
1da177e4
LT		 428 goto err_sw_init;
429
430 netdev->features = NETIF_F_SG |
431 NETIF_F_HW_CSUM |
432 NETIF_F_HW_VLAN_TX |
433 NETIF_F_HW_VLAN_RX |
434 NETIF_F_HW_VLAN_FILTER;
1da177e4 435 netdev->features |= NETIF_F_TSO;
1da177e4 436
03f83041 437 if (pci_using_dac)
1da177e4
LT		 438 netdev->features |= NETIF_F_HIGHDMA;
439
440 /* make sure the EEPROM is good */
441
03f83041 442 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
ec9c3f5d 443 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 444 err = -EIO;
445 goto err_eeprom;
446 }
447
448 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
df859c51 449 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1da177e4 450
03f83041 451 if (!is_valid_ether_addr(netdev->perm_addr)) {
ec9c3f5d 452 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1da177e4
LT		 453 err = -EIO;
454 goto err_eeprom;
455 }
456
457 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
458
459 init_timer(&adapter->watchdog_timer);
460 adapter->watchdog_timer.function = &ixgb_watchdog;
461 adapter->watchdog_timer.data = (unsigned long)adapter;
462
c4028958 463 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 464
ec9c3f5d 465 strcpy(netdev->name, "eth%d");
9e7bd330
JB		 466 err = register_netdev(netdev);
467 if (err)
1da177e4
LT		 468 goto err_register;
469
470 /* we're going to reset, so assume we have no link for now */
471
472 netif_carrier_off(netdev);
473 netif_stop_queue(netdev);
474
ec9c3f5d 475 DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
1da177e4
LT		 476 ixgb_check_options(adapter);
477 /* reset the hardware with the new settings */
478
479 ixgb_reset(adapter);
480
481 cards_found++;
482 return 0;
483
484err_register:
485err_sw_init:
486err_eeprom:
487 iounmap(adapter->hw.hw_addr);
488err_ioremap:
489 free_netdev(netdev);
490err_alloc_etherdev:
491 pci_release_regions(pdev);
c91e468a
AS		 492err_request_regions:
493err_dma_mask:
494 pci_disable_device(pdev);
1da177e4
LT		 495 return err;
496}
497
498/**
499 * ixgb_remove - Device Removal Routine
500 * @pdev: PCI device information struct
501 *
502 * ixgb_remove is called by the PCI subsystem to alert the driver
503 * that it should release a PCI device. The could be caused by a
504 * Hot-Plug event, or because the driver is going to be removed from
505 * memory.
506 **/
507
508static void __devexit
509ixgb_remove(struct pci_dev *pdev)
510{
511 struct net_device *netdev = pci_get_drvdata(pdev);
8908c6cd 512 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 513
12579697
JB		 514 flush_scheduled_work();
515
1da177e4
LT		 516 unregister_netdev(netdev);
517
518 iounmap(adapter->hw.hw_addr);
519 pci_release_regions(pdev);
520
521 free_netdev(netdev);
522}
523
524/**
525 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
526 * @adapter: board private structure to initialize
527 *
528 * ixgb_sw_init initializes the Adapter private data structure.
529 * Fields are initialized based on PCI device information and
530 * OS network device settings (MTU size).
531 **/
532
533static int __devinit
534ixgb_sw_init(struct ixgb_adapter *adapter)
535{
536 struct ixgb_hw *hw = &adapter->hw;
537 struct net_device *netdev = adapter->netdev;
538 struct pci_dev *pdev = adapter->pdev;
539
540 /* PCI config space info */
541
542 hw->vendor_id = pdev->vendor;
543 hw->device_id = pdev->device;
544 hw->subsystem_vendor_id = pdev->subsystem_vendor;
545 hw->subsystem_id = pdev->subsystem_device;
546
1da177e4 547 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
a3dc3da0 548 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
1da177e4 549
03f83041 550 if ((hw->device_id == IXGB_DEVICE_ID_82597EX)
940829e2
AK		 551 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
552 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
553 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
0060c072 554 hw->mac_type = ixgb_82597;
1da177e4
LT		 555 else {
556 /* should never have loaded on this device */
ec9c3f5d 557 DPRINTK(PROBE, ERR, "unsupported device id\n");
1da177e4
LT		 558 }
559
560 /* enable flow control to be programmed */
561 hw->fc.send_xon = 1;
562
bab2bce7 563 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 564 return 0;
565}
566
567/**
568 * ixgb_open - Called when a network interface is made active
569 * @netdev: network interface device structure
570 *
571 * Returns 0 on success, negative value on failure
572 *
573 * The open entry point is called when a network interface is made
574 * active by the system (IFF_UP). At this point all resources needed
575 * for transmit and receive operations are allocated, the interrupt
576 * handler is registered with the OS, the watchdog timer is started,
577 * and the stack is notified that the interface is ready.
578 **/
579
580static int
581ixgb_open(struct net_device *netdev)
582{
8908c6cd 583 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 584 int err;
585
586 /* allocate transmit descriptors */
9e7bd330
JB		 587 err = ixgb_setup_tx_resources(adapter);
588 if (err)
1da177e4
LT		 589 goto err_setup_tx;
590
591 /* allocate receive descriptors */
592
9e7bd330
JB		 593 err = ixgb_setup_rx_resources(adapter);
594 if (err)
1da177e4
LT		 595 goto err_setup_rx;
596
9e7bd330
JB		 597 err = ixgb_up(adapter);
598 if (err)
1da177e4
LT		 599 goto err_up;
600
601 return 0;
602
603err_up:
604 ixgb_free_rx_resources(adapter);
605err_setup_rx:
606 ixgb_free_tx_resources(adapter);
607err_setup_tx:
608 ixgb_reset(adapter);
609
610 return err;
611}
612
613/**
614 * ixgb_close - Disables a network interface
615 * @netdev: network interface device structure
616 *
617 * Returns 0, this is not allowed to fail
618 *
619 * The close entry point is called when an interface is de-activated
620 * by the OS. The hardware is still under the drivers control, but
621 * needs to be disabled. A global MAC reset is issued to stop the
622 * hardware, and all transmit and receive resources are freed.
623 **/
624
625static int
626ixgb_close(struct net_device *netdev)
627{
8908c6cd 628 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 629
446490ca 630 ixgb_down(adapter, true);
1da177e4
LT		 631
632 ixgb_free_tx_resources(adapter);
633 ixgb_free_rx_resources(adapter);
634
635 return 0;
636}
637
638/**
639 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
640 * @adapter: board private structure
641 *
642 * Return 0 on success, negative on failure
643 **/
644
645int
646ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
647{
648 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
649 struct pci_dev *pdev = adapter->pdev;
650 int size;
651
652 size = sizeof(struct ixgb_buffer) * txdr->count;
653 txdr->buffer_info = vmalloc(size);
03f83041 654 if (!txdr->buffer_info) {
ec9c3f5d
AK		 655 DPRINTK(PROBE, ERR,
656 "Unable to allocate transmit descriptor ring memory\n");
1da177e4
LT		 657 return -ENOMEM;
658 }
659 memset(txdr->buffer_info, 0, size);
660
661 /* round up to nearest 4K */
662
663 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 664 txdr->size = ALIGN(txdr->size, 4096);
1da177e4
LT		 665
666 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
03f83041 667 if (!txdr->desc) {
1da177e4 668 vfree(txdr->buffer_info);
ec9c3f5d
AK		 669 DPRINTK(PROBE, ERR,
670 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 671 return -ENOMEM;
672 }
673 memset(txdr->desc, 0, txdr->size);
674
675 txdr->next_to_use = 0;
676 txdr->next_to_clean = 0;
677
678 return 0;
679}
680
681/**
682 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
683 * @adapter: board private structure
684 *
685 * Configure the Tx unit of the MAC after a reset.
686 **/
687
688static void
689ixgb_configure_tx(struct ixgb_adapter *adapter)
690{
222441a6
JP		 691 u64 tdba = adapter->tx_ring.dma;
692 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
693 u32 tctl;
1da177e4
LT		 694 struct ixgb_hw *hw = &adapter->hw;
695
0060c072
JB		 696 /* Setup the Base and Length of the Tx Descriptor Ring
697 * tx_ring.dma can be either a 32 or 64 bit value
1da177e4
LT		 698 */
699
700 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
701 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
702
703 IXGB_WRITE_REG(hw, TDLEN, tdlen);
704
705 /* Setup the HW Tx Head and Tail descriptor pointers */
706
707 IXGB_WRITE_REG(hw, TDH, 0);
708 IXGB_WRITE_REG(hw, TDT, 0);
709
710 /* don't set up txdctl, it induces performance problems if configured
711 * incorrectly */
712 /* Set the Tx Interrupt Delay register */
713
714 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
715
716 /* Program the Transmit Control Register */
717
718 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
719 IXGB_WRITE_REG(hw, TCTL, tctl);
720
721 /* Setup Transmit Descriptor Settings for this adapter */
722 adapter->tx_cmd_type =
0060c072
JB		 723 IXGB_TX_DESC_TYPE |
724 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
1da177e4
LT		 725}
726
727/**
728 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
729 * @adapter: board private structure
730 *
731 * Returns 0 on success, negative on failure
732 **/
733
734int
735ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
736{
737 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
738 struct pci_dev *pdev = adapter->pdev;
739 int size;
740
741 size = sizeof(struct ixgb_buffer) * rxdr->count;
742 rxdr->buffer_info = vmalloc(size);
03f83041 743 if (!rxdr->buffer_info) {
ec9c3f5d
AK		 744 DPRINTK(PROBE, ERR,
745 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 746 return -ENOMEM;
747 }
748 memset(rxdr->buffer_info, 0, size);
749
750 /* Round up to nearest 4K */
751
752 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 753 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4
LT		 754
755 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
756
03f83041 757 if (!rxdr->desc) {
1da177e4 758 vfree(rxdr->buffer_info);
ec9c3f5d
AK		 759 DPRINTK(PROBE, ERR,
760 "Unable to allocate receive descriptors\n");
1da177e4
LT		 761 return -ENOMEM;
762 }
763 memset(rxdr->desc, 0, rxdr->size);
764
765 rxdr->next_to_clean = 0;
766 rxdr->next_to_use = 0;
767
768 return 0;
769}
770
771/**
772 * ixgb_setup_rctl - configure the receive control register
773 * @adapter: Board private structure
774 **/
775
776static void
777ixgb_setup_rctl(struct ixgb_adapter *adapter)
778{
222441a6 779 u32 rctl;
1da177e4
LT		 780
781 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
782
783 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
784
785 rctl |=
0060c072
JB		 786 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
787 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
1da177e4
LT		 788 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
789
790 rctl |= IXGB_RCTL_SECRC;
791
3f3dc0dd 792 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 793 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 794 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 795 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 796 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 797 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 798 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 799 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 800
801 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
802}
803
804/**
805 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
806 * @adapter: board private structure
807 *
808 * Configure the Rx unit of the MAC after a reset.
809 **/
810
811static void
812ixgb_configure_rx(struct ixgb_adapter *adapter)
813{
222441a6
JP		 814 u64 rdba = adapter->rx_ring.dma;
815 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 816 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 817 u32 rctl;
818 u32 rxcsum;
1da177e4
LT		 819
820 /* make sure receives are disabled while setting up the descriptors */
821
822 rctl = IXGB_READ_REG(hw, RCTL);
823 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
824
825 /* set the Receive Delay Timer Register */
826
827 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
828
829 /* Setup the Base and Length of the Rx Descriptor Ring */
830
831 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
832 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
833
834 IXGB_WRITE_REG(hw, RDLEN, rdlen);
835
836 /* Setup the HW Rx Head and Tail Descriptor Pointers */
837 IXGB_WRITE_REG(hw, RDH, 0);
838 IXGB_WRITE_REG(hw, RDT, 0);
839
4360386f
JB		 840 /* due to the hardware errata with RXDCTL, we are unable to use any of
841 * the performance enhancing features of it without causing other
842 * subtle bugs, some of the bugs could include receive length
843 * corruption at high data rates (WTHRESH > 0) and/or receive
844 * descriptor ring irregularites (particularly in hardware cache) */
845 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 846
847 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 848 if (adapter->rx_csum) {
1da177e4
LT		 849 rxcsum = IXGB_READ_REG(hw, RXCSUM);
850 rxcsum |= IXGB_RXCSUM_TUOFL;
851 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
852 }
853
854 /* Enable Receives */
855
856 IXGB_WRITE_REG(hw, RCTL, rctl);
857}
858
859/**
860 * ixgb_free_tx_resources - Free Tx Resources
861 * @adapter: board private structure
862 *
863 * Free all transmit software resources
864 **/
865
866void
867ixgb_free_tx_resources(struct ixgb_adapter *adapter)
868{
869 struct pci_dev *pdev = adapter->pdev;
870
871 ixgb_clean_tx_ring(adapter);
872
873 vfree(adapter->tx_ring.buffer_info);
874 adapter->tx_ring.buffer_info = NULL;
875
876 pci_free_consistent(pdev, adapter->tx_ring.size,
877 adapter->tx_ring.desc, adapter->tx_ring.dma);
878
879 adapter->tx_ring.desc = NULL;
880}
881
235949d1 882static void
1da177e4 883ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
0060c072 884 struct ixgb_buffer *buffer_info)
1da177e4
LT		 885{
886 struct pci_dev *pdev = adapter->pdev;
1dfdd7df
AK		 887
888 if (buffer_info->dma)
889 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
890 PCI_DMA_TODEVICE);
891
c2199340
JB		 892 /* okay to call kfree_skb here instead of kfree_skb_any because
893 * this is never called in interrupt context */
1dfdd7df 894 if (buffer_info->skb)
c2199340 895 dev_kfree_skb(buffer_info->skb);
1dfdd7df
AK		 896
897 buffer_info->skb = NULL;
898 buffer_info->dma = 0;
899 buffer_info->time_stamp = 0;
900 /* these fields must always be initialized in tx
901 * buffer_info->length = 0;
902 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 903}
904
905/**
906 * ixgb_clean_tx_ring - Free Tx Buffers
907 * @adapter: board private structure
908 **/
909
910static void
911ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
912{
913 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
914 struct ixgb_buffer *buffer_info;
915 unsigned long size;
916 unsigned int i;
917
918 /* Free all the Tx ring sk_buffs */
919
1459336d 920 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 921 buffer_info = &tx_ring->buffer_info[i];
922 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
923 }
924
925 size = sizeof(struct ixgb_buffer) * tx_ring->count;
926 memset(tx_ring->buffer_info, 0, size);
927
928 /* Zero out the descriptor ring */
929
930 memset(tx_ring->desc, 0, tx_ring->size);
931
932 tx_ring->next_to_use = 0;
933 tx_ring->next_to_clean = 0;
934
935 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
936 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
937}
938
939/**
940 * ixgb_free_rx_resources - Free Rx Resources
941 * @adapter: board private structure
942 *
943 * Free all receive software resources
944 **/
945
946void
947ixgb_free_rx_resources(struct ixgb_adapter *adapter)
948{
949 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
950 struct pci_dev *pdev = adapter->pdev;
951
952 ixgb_clean_rx_ring(adapter);
953
954 vfree(rx_ring->buffer_info);
955 rx_ring->buffer_info = NULL;
956
957 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
958
959 rx_ring->desc = NULL;
960}
961
962/**
963 * ixgb_clean_rx_ring - Free Rx Buffers
964 * @adapter: board private structure
965 **/
966
967static void
968ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
969{
970 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
971 struct ixgb_buffer *buffer_info;
972 struct pci_dev *pdev = adapter->pdev;
973 unsigned long size;
974 unsigned int i;
975
976 /* Free all the Rx ring sk_buffs */
977
1459336d 978 for (i = 0; i < rx_ring->count; i++) {
1da177e4 979 buffer_info = &rx_ring->buffer_info[i];
03f83041 980 if (buffer_info->skb) {
1da177e4
LT		 981
982 pci_unmap_single(pdev,
983 buffer_info->dma,
984 buffer_info->length,
985 PCI_DMA_FROMDEVICE);
986
987 dev_kfree_skb(buffer_info->skb);
988
989 buffer_info->skb = NULL;
990 }
991 }
992
993 size = sizeof(struct ixgb_buffer) * rx_ring->count;
994 memset(rx_ring->buffer_info, 0, size);
995
996 /* Zero out the descriptor ring */
997
998 memset(rx_ring->desc, 0, rx_ring->size);
999
1000 rx_ring->next_to_clean = 0;
1001 rx_ring->next_to_use = 0;
1002
1003 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1004 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1005}
1006
1007/**
1008 * ixgb_set_mac - Change the Ethernet Address of the NIC
1009 * @netdev: network interface device structure
1010 * @p: pointer to an address structure
1011 *
1012 * Returns 0 on success, negative on failure
1013 **/
1014
1015static int
1016ixgb_set_mac(struct net_device *netdev, void *p)
1017{
8908c6cd 1018 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1019 struct sockaddr *addr = p;
1020
03f83041 1021 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1022 return -EADDRNOTAVAIL;
1023
1024 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1025
1026 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1027
1028 return 0;
1029}
1030
1031/**
1032 * ixgb_set_multi - Multicast and Promiscuous mode set
1033 * @netdev: network interface device structure
1034 *
1035 * The set_multi entry point is called whenever the multicast address
1036 * list or the network interface flags are updated. This routine is
1037 * responsible for configuring the hardware for proper multicast,
1038 * promiscuous mode, and all-multi behavior.
1039 **/
1040
1041static void
1042ixgb_set_multi(struct net_device *netdev)
1043{
8908c6cd 1044 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1045 struct ixgb_hw *hw = &adapter->hw;
1046 struct dev_mc_list *mc_ptr;
222441a6 1047 u32 rctl;
1da177e4
LT		 1048 int i;
1049
1050 /* Check for Promiscuous and All Multicast modes */
1051
1052 rctl = IXGB_READ_REG(hw, RCTL);
1053
03f83041 1054 if (netdev->flags & IFF_PROMISC) {
1da177e4 1055 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
03f83041 1056 } else if (netdev->flags & IFF_ALLMULTI) {
1da177e4
LT		 1057 rctl |= IXGB_RCTL_MPE;
1058 rctl &= ~IXGB_RCTL_UPE;
1059 } else {
1060 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1061 }
1062
03f83041 1063 if (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1064 rctl |= IXGB_RCTL_MPE;
1065 IXGB_WRITE_REG(hw, RCTL, rctl);
1066 } else {
222441a6 1067 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1068 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1069
1070 IXGB_WRITE_REG(hw, RCTL, rctl);
1071
0060c072
JB		 1072 for (i = 0, mc_ptr = netdev->mc_list;
1073 mc_ptr;
1074 i++, mc_ptr = mc_ptr->next)
1da177e4 1075 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
0060c072 1076 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1da177e4
LT		 1077
1078 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1079 }
1080}
1081
1082/**
1083 * ixgb_watchdog - Timer Call-back
1084 * @data: pointer to netdev cast into an unsigned long
1085 **/
1086
1087static void
1088ixgb_watchdog(unsigned long data)
1089{
1090 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1091 struct net_device *netdev = adapter->netdev;
1092 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1093
1094 ixgb_check_for_link(&adapter->hw);
1095
1096 if (ixgb_check_for_bad_link(&adapter->hw)) {
1097 /* force the reset path */
1098 netif_stop_queue(netdev);
1099 }
1100
03f83041
JB		 1101 if (adapter->hw.link_up) {
1102 if (!netif_carrier_ok(netdev)) {
ec9c3f5d
AK		 1103 DPRINTK(LINK, INFO,
1104 "NIC Link is Up 10000 Mbps Full Duplex\n");
1da177e4
LT		 1105 adapter->link_speed = 10000;
1106 adapter->link_duplex = FULL_DUPLEX;
1107 netif_carrier_on(netdev);
1108 netif_wake_queue(netdev);
1109 }
1110 } else {
03f83041 1111 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1112 adapter->link_speed = 0;
1113 adapter->link_duplex = 0;
ec9c3f5d 1114 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1da177e4
LT		 1115 netif_carrier_off(netdev);
1116 netif_stop_queue(netdev);
1117
1118 }
1119 }
1120
1121 ixgb_update_stats(adapter);
1122
03f83041
JB		 1123 if (!netif_carrier_ok(netdev)) {
1124 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1125 /* We've lost link, so the controller stops DMA,
1126 * but we've got queued Tx work that's never going
1127 * to get done, so reset controller to flush Tx.
1128 * (Do the reset outside of interrupt context). */
1129 schedule_work(&adapter->tx_timeout_task);
1130 }
1131 }
1132
1133 /* Force detection of hung controller every watchdog period */
446490ca 1134 adapter->detect_tx_hung = true;
1da177e4
LT		 1135
1136 /* generate an interrupt to force clean up of any stragglers */
1137 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1138
1139 /* Reset the timer */
1140 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1141}
1142
1143#define IXGB_TX_FLAGS_CSUM 0x00000001
1144#define IXGB_TX_FLAGS_VLAN 0x00000002
1145#define IXGB_TX_FLAGS_TSO 0x00000004
1146
235949d1 1147static int
1da177e4
LT		 1148ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1149{
1da177e4
LT		 1150 struct ixgb_context_desc *context_desc;
1151 unsigned int i;
222441a6
JP		 1152 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1153 u16 ipcse, tucse, mss;
1da177e4
LT		 1154 int err;
1155
89114afd 1156 if (likely(skb_is_gso(skb))) {
adc54139 1157 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1158 struct iphdr *iph;
1159
1da177e4
LT		 1160 if (skb_header_cloned(skb)) {
1161 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1162 if (err)
1163 return err;
1164 }
1165
ab6a5bb6 1166 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1167 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1168 iph = ip_hdr(skb);
1169 iph->tot_len = 0;
1170 iph->check = 0;
aa8223c7
ACM		 1171 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1172 iph->daddr, 0,
1173 IPPROTO_TCP, 0);
bbe735e4 1174 ipcss = skb_network_offset(skb);
eddc9ec5 1175 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1176 ipcse = skb_transport_offset(skb) - 1;
1177 tucss = skb_transport_offset(skb);
aa8223c7 1178 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1179 tucse = 0;
1180
1181 i = adapter->tx_ring.next_to_use;
1182 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1183 buffer_info = &adapter->tx_ring.buffer_info[i];
1184 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1185
1186 context_desc->ipcss = ipcss;
1187 context_desc->ipcso = ipcso;
1188 context_desc->ipcse = cpu_to_le16(ipcse);
1189 context_desc->tucss = tucss;
1190 context_desc->tucso = tucso;
1191 context_desc->tucse = cpu_to_le16(tucse);
1192 context_desc->mss = cpu_to_le16(mss);
1193 context_desc->hdr_len = hdr_len;
1194 context_desc->status = 0;
1195 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1196 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1197 | IXGB_CONTEXT_DESC_CMD_TSE
1198 | IXGB_CONTEXT_DESC_CMD_IP
1199 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1200 | IXGB_CONTEXT_DESC_CMD_IDE
1201 | (skb->len - (hdr_len)));
1202
06c2f9ec 1203
03f83041 1204 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1205 adapter->tx_ring.next_to_use = i;
1206
1207 return 1;
1208 }
1da177e4
LT		 1209
1210 return 0;
1211}
1212
446490ca 1213static bool
1da177e4
LT		 1214ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1215{
1216 struct ixgb_context_desc *context_desc;
1217 unsigned int i;
222441a6 1218 u8 css, cso;
1da177e4 1219
03f83041 1220 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1221 struct ixgb_buffer *buffer_info;
ea2ae17d 1222 css = skb_transport_offset(skb);
ff1dcadb 1223 cso = css + skb->csum_offset;
1da177e4
LT		 1224
1225 i = adapter->tx_ring.next_to_use;
1226 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1227 buffer_info = &adapter->tx_ring.buffer_info[i];
1228 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1229
1230 context_desc->tucss = css;
1231 context_desc->tucso = cso;
1232 context_desc->tucse = 0;
1233 /* zero out any previously existing data in one instruction */
222441a6 1234 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1235 context_desc->status = 0;
1236 context_desc->hdr_len = 0;
1237 context_desc->mss = 0;
1238 context_desc->cmd_type_len =
1239 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1240 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1241
03f83041 1242 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1243 adapter->tx_ring.next_to_use = i;
1244
446490ca 1245 return true;
1da177e4
LT		 1246 }
1247
446490ca 1248 return false;
1da177e4
LT		 1249}
1250
1251#define IXGB_MAX_TXD_PWR 14
1252#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1253
235949d1 1254static int
1da177e4
LT		 1255ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1256 unsigned int first)
1257{
1258 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1259 struct ixgb_buffer *buffer_info;
1260 int len = skb->len;
1261 unsigned int offset = 0, size, count = 0, i;
5d927853 1262 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1263
1264 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1265 unsigned int f;
ac79c82e 1266
1da177e4
LT		 1267 len -= skb->data_len;
1268
1269 i = tx_ring->next_to_use;
1270
9a432992 1271 while (len) {
1da177e4 1272 buffer_info = &tx_ring->buffer_info[i];
709cf018 1273 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1274 /* Workaround for premature desc write-backs
1275 * in TSO mode. Append 4-byte sentinel desc */
1276 if (unlikely(mss && !nr_frags && size == len && size > 8))
1277 size -= 4;
1278
1da177e4 1279 buffer_info->length = size;
adc54139 1280 WARN_ON(buffer_info->dma != 0);
34336635 1281 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1282 buffer_info->dma =
1283 pci_map_single(adapter->pdev,
1284 skb->data + offset,
1285 size,
1286 PCI_DMA_TODEVICE);
1dfdd7df 1287 buffer_info->next_to_watch = 0;
1da177e4
LT		 1288
1289 len -= size;
1290 offset += size;
1291 count++;
03f83041 1292 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1293 }
1294
1459336d 1295 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 1296 struct skb_frag_struct *frag;
1297
1298 frag = &skb_shinfo(skb)->frags[f];
1299 len = frag->size;
1300 offset = 0;
1301
9a432992 1302 while (len) {
1da177e4 1303 buffer_info = &tx_ring->buffer_info[i];
709cf018 1304 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1305
1306 /* Workaround for premature desc write-backs
1307 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1308 if (unlikely(mss && (f == (nr_frags - 1))
1309 && size == len && size > 8))
5d927853
JB		 1310 size -= 4;
1311
1da177e4 1312 buffer_info->length = size;
34336635 1313 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1314 buffer_info->dma =
1315 pci_map_page(adapter->pdev,
1316 frag->page,
1317 frag->page_offset + offset,
1318 size,
1319 PCI_DMA_TODEVICE);
1dfdd7df 1320 buffer_info->next_to_watch = 0;
1da177e4
LT		 1321
1322 len -= size;
1323 offset += size;
1324 count++;
03f83041 1325 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1326 }
1327 }
1328 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1329 tx_ring->buffer_info[i].skb = skb;
1330 tx_ring->buffer_info[first].next_to_watch = i;
1331
1332 return count;
1333}
1334
235949d1 1335static void
1da177e4
LT		 1336ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1337{
1338 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1339 struct ixgb_tx_desc *tx_desc = NULL;
1340 struct ixgb_buffer *buffer_info;
222441a6
JP		 1341 u32 cmd_type_len = adapter->tx_cmd_type;
1342 u8 status = 0;
1343 u8 popts = 0;
1da177e4
LT		 1344 unsigned int i;
1345
03f83041 1346 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1347 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1348 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1349 }
1350
03f83041 1351 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1352 popts |= IXGB_TX_DESC_POPTS_TXSM;
1353
03f83041 1354 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1355 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1356
1357 i = tx_ring->next_to_use;
1358
9a432992 1359 while (count--) {
1da177e4
LT		 1360 buffer_info = &tx_ring->buffer_info[i];
1361 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1362 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1363 tx_desc->cmd_type_len =
1364 cpu_to_le32(cmd_type_len | buffer_info->length);
1365 tx_desc->status = status;
1366 tx_desc->popts = popts;
1367 tx_desc->vlan = cpu_to_le16(vlan_id);
1368
03f83041 1369 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1370 }
1371
0060c072
JB		 1372 tx_desc->cmd_type_len |=
1373 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1374
1375 /* Force memory writes to complete before letting h/w
1376 * know there are new descriptors to fetch. (Only
1377 * applicable for weak-ordered memory model archs,
1378 * such as IA-64). */
1379 wmb();
1380
1381 tx_ring->next_to_use = i;
1382 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1383}
1384
dfd341e4
JB		 1385static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1386{
1387 struct ixgb_adapter *adapter = netdev_priv(netdev);
1388 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1389
1390 netif_stop_queue(netdev);
1391 /* Herbert's original patch had:
1392 * smp_mb__after_netif_stop_queue();
1393 * but since that doesn't exist yet, just open code it. */
1394 smp_mb();
1395
1396 /* We need to check again in a case another CPU has just
1397 * made room available. */
1398 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1399 return -EBUSY;
1400
1401 /* A reprieve! */
1402 netif_start_queue(netdev);
1403 ++adapter->restart_queue;
1404 return 0;
1405}
1406
1407static int ixgb_maybe_stop_tx(struct net_device *netdev,
1408 struct ixgb_desc_ring *tx_ring, int size)
1409{
1410 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1411 return 0;
1412 return __ixgb_maybe_stop_tx(netdev, size);
1413}
1414
1415
1da177e4
LT		 1416/* Tx Descriptors needed, worst case */
1417#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1418 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1419#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1420 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1421 + 1 /* one more needed for sentinel TSO workaround */
1da177e4
LT		 1422
1423static int
1424ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1425{
8908c6cd 1426 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1427 unsigned int first;
1428 unsigned int tx_flags = 0;
1da177e4
LT		 1429 int vlan_id = 0;
1430 int tso;
1431
bab2bce7
JB		 1432 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1433 dev_kfree_skb(skb);
1434 return NETDEV_TX_OK;
1435 }
1436
03f83041 1437 if (skb->len <= 0) {
c2199340 1438 dev_kfree_skb(skb);
1da177e4
LT		 1439 return 0;
1440 }
1441
dfd341e4 1442 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1443 DESC_NEEDED)))
f017f14b 1444 return NETDEV_TX_BUSY;
1da177e4 1445
03f83041 1446 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1da177e4
LT		 1447 tx_flags |= IXGB_TX_FLAGS_VLAN;
1448 vlan_id = vlan_tx_tag_get(skb);
1449 }
1450
1451 first = adapter->tx_ring.next_to_use;
0060c072 1452
1da177e4
LT		 1453 tso = ixgb_tso(adapter, skb);
1454 if (tso < 0) {
c2199340 1455 dev_kfree_skb(skb);
1da177e4
LT		 1456 return NETDEV_TX_OK;
1457 }
1458
96f9c2e2 1459 if (likely(tso))
1da177e4 1460 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1461 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1462 tx_flags |= IXGB_TX_FLAGS_CSUM;
1463
1464 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1465 tx_flags);
1466
1467 netdev->trans_start = jiffies;
1468
f017f14b 1469 /* Make sure there is space in the ring for the next send. */
dfd341e4 1470 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
f017f14b 1471
f017f14b 1472 return NETDEV_TX_OK;
1da177e4
LT		 1473}
1474
1475/**
1476 * ixgb_tx_timeout - Respond to a Tx Hang
1477 * @netdev: network interface device structure
1478 **/
1479
1480static void
1481ixgb_tx_timeout(struct net_device *netdev)
1482{
8908c6cd 1483 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1484
1485 /* Do the reset outside of interrupt context */
1486 schedule_work(&adapter->tx_timeout_task);
1487}
1488
1489static void
c4028958 1490ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1491{
c4028958
DH		 1492 struct ixgb_adapter *adapter =
1493 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1494
9b8118df 1495 adapter->tx_timeout_count++;
446490ca 1496 ixgb_down(adapter, true);
1da177e4
LT		 1497 ixgb_up(adapter);
1498}
1499
1500/**
1501 * ixgb_get_stats - Get System Network Statistics
1502 * @netdev: network interface device structure
1503 *
1504 * Returns the address of the device statistics structure.
1505 * The statistics are actually updated from the timer callback.
1506 **/
1507
1508static struct net_device_stats *
1509ixgb_get_stats(struct net_device *netdev)
1510{
8908c6cd 1511 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1512
1513 return &adapter->net_stats;
1514}
1515
1516/**
1517 * ixgb_change_mtu - Change the Maximum Transfer Unit
1518 * @netdev: network interface device structure
1519 * @new_mtu: new value for maximum frame size
1520 *
1521 * Returns 0 on success, negative on failure
1522 **/
1523
1524static int
1525ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1526{
8908c6cd 1527 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1528 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1529 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1530
a65a604a
JB		 1531 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1532 if ((new_mtu < 68) ||
1533 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
ec9c3f5d 1534 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1535 return -EINVAL;
1536 }
1537
b5ca88eb
JB		 1538 if (old_max_frame == max_frame)
1539 return 0;
1540
1541 if (netif_running(netdev))
1542 ixgb_down(adapter, true);
1543
a3dc3da0 1544 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1545
1546 netdev->mtu = new_mtu;
1547
b5ca88eb 1548 if (netif_running(netdev))
1da177e4 1549 ixgb_up(adapter);
1da177e4
LT		 1550
1551 return 0;
1552}
1553
1554/**
1555 * ixgb_update_stats - Update the board statistics counters.
1556 * @adapter: board private structure
1557 **/
1558
1559void
1560ixgb_update_stats(struct ixgb_adapter *adapter)
1561{
5633684d 1562 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1563 struct pci_dev *pdev = adapter->pdev;
1564
1565 /* Prevent stats update while adapter is being reset */
81b1955e 1566 if (pci_channel_offline(pdev))
01748fbb 1567 return;
5633684d 1568
03f83041 1569 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
5633684d
MC		 1570 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1571 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1572 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1573 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1574 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1575
1576 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1577 /* fix up multicast stats by removing broadcasts */
03f83041 1578 if (multi >= bcast)
7b89178d 1579 multi -= bcast;
0060c072 1580
5633684d
MC		 1581 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1582 adapter->stats.mprch += (multi >> 32);
0060c072 1583 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1584 adapter->stats.bprch += bcast_h;
1585 } else {
1586 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1587 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1588 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1589 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1590 }
1da177e4
LT		 1591 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1592 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1593 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1594 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1595 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1596 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1597 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1598 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1599 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1600 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1601 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1602 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1603 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1604 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1605 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1606 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1607 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1608 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1609 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1610 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1611 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1612 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1613 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1614 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1615 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1616 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1617 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1618 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1619 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1620 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1621 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1622 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1623 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1624 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1625 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1626 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1627 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1628 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1629 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1630 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1631 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1632 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1633 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1634 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1635 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1636 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1637 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1638 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1639 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1640 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1641 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1642 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1643 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1644 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1645 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1646 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1647
1648 /* Fill out the OS statistics structure */
1649
1650 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1651 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1652 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1653 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1654 adapter->net_stats.multicast = adapter->stats.mprcl;
1655 adapter->net_stats.collisions = 0;
1656
1657 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1658 * with a length in the type/len field */
1659 adapter->net_stats.rx_errors =
1660 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1661 adapter->stats.ruc +
1662 adapter->stats.roc /*+ adapter->stats.rlec */ +
1663 adapter->stats.icbc +
1664 adapter->stats.ecbc + adapter->stats.mpc;
1665
1da177e4
LT		 1666 /* see above
1667 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1668 */
1669
1670 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1671 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1672 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1673 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1674
1675 adapter->net_stats.tx_errors = 0;
1676 adapter->net_stats.rx_frame_errors = 0;
1677 adapter->net_stats.tx_aborted_errors = 0;
1678 adapter->net_stats.tx_carrier_errors = 0;
1679 adapter->net_stats.tx_fifo_errors = 0;
1680 adapter->net_stats.tx_heartbeat_errors = 0;
1681 adapter->net_stats.tx_window_errors = 0;
1682}
1683
1684#define IXGB_MAX_INTR 10
1685/**
1686 * ixgb_intr - Interrupt Handler
1687 * @irq: interrupt number
1688 * @data: pointer to a network interface device structure
1da177e4
LT		 1689 **/
1690
1691static irqreturn_t
7d12e780 1692ixgb_intr(int irq, void *data)
1da177e4
LT		 1693{
1694 struct net_device *netdev = data;
8908c6cd 1695 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1696 struct ixgb_hw *hw = &adapter->hw;
222441a6 1697 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4 1698
03f83041 1699 if (unlikely(!icr))
1da177e4
LT		 1700 return IRQ_NONE; /* Not our interrupt */
1701
bab2bce7
JB		 1702 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1703 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1704 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4 1705
bea3348e 1706 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1da177e4 1707
0060c072 1708 /* Disable interrupts and register for poll. The flush
1da177e4
LT		 1709 of the posted write is intentionally left out.
1710 */
1711
1da177e4 1712 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
bea3348e 1713 __netif_rx_schedule(netdev, &adapter->napi);
1da177e4 1714 }
1da177e4
LT		 1715 return IRQ_HANDLED;
1716}
1717
1da177e4
LT		 1718/**
1719 * ixgb_clean - NAPI Rx polling callback
1720 * @adapter: board private structure
1721 **/
1722
1723static int
bea3348e 1724ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1725{
bea3348e
SH		 1726 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1727 struct net_device *netdev = adapter->netdev;
1da177e4
LT		 1728 int work_done = 0;
1729
53e52c72 1730 ixgb_clean_tx_irq(adapter);
bea3348e 1731 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1732
53e52c72
DM		 1733 /* If budget not fully consumed, exit the polling mode */
1734 if (work_done < budget) {
bea3348e 1735 netif_rx_complete(netdev, napi);
72ab5195
JB		 1736 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1737 ixgb_irq_enable(adapter);
1da177e4
LT		 1738 }
1739
bea3348e 1740 return work_done;
1da177e4 1741}
1da177e4
LT		 1742
1743/**
1744 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1745 * @adapter: board private structure
1746 **/
1747
446490ca 1748static bool
1da177e4
LT		 1749ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1750{
1751 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1752 struct net_device *netdev = adapter->netdev;
1753 struct ixgb_tx_desc *tx_desc, *eop_desc;
1754 struct ixgb_buffer *buffer_info;
1755 unsigned int i, eop;
446490ca 1756 bool cleaned = false;
1da177e4
LT		 1757
1758 i = tx_ring->next_to_clean;
1759 eop = tx_ring->buffer_info[i].next_to_watch;
1760 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1761
9a432992 1762 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1763
446490ca 1764 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1765 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1766 buffer_info = &tx_ring->buffer_info[i];
1767
0060c072
JB		 1768 if (tx_desc->popts &
1769 (IXGB_TX_DESC_POPTS_TXSM |
1770 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1771 adapter->hw_csum_tx_good++;
1772
1773 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1774
222441a6 1775 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1776
1777 cleaned = (i == eop);
03f83041 1778 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1779 }
1780
1781 eop = tx_ring->buffer_info[i].next_to_watch;
1782 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1783 }
1784
1785 tx_ring->next_to_clean = i;
1786
0f8ecbad
JB		 1787 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1788 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1789 /* Make sure that anybody stopping the queue after this
1790 * sees the new next_to_clean. */
1791 smp_mb();
1792
1793 if (netif_queue_stopped(netdev) &&
1794 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1795 netif_wake_queue(netdev);
0f8ecbad
JB		 1796 ++adapter->restart_queue;
1797 }
1da177e4 1798 }
1da177e4 1799
03f83041 1800 if (adapter->detect_tx_hung) {
1da177e4
LT		 1801 /* detect a transmit hang in hardware, this serializes the
1802 * check with the clearing of time_stamp and movement of i */
446490ca 1803 adapter->detect_tx_hung = false;
9b8118df
AK		 1804 if (tx_ring->buffer_info[eop].dma &&
1805 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1806 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1807 IXGB_STATUS_TXOFF)) {
1808 /* detected Tx unit hang */
1809 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1810 " TDH <%x>\n"
1811 " TDT <%x>\n"
1812 " next_to_use <%x>\n"
1813 " next_to_clean <%x>\n"
1814 "buffer_info[next_to_clean]\n"
1815 " time_stamp <%lx>\n"
1816 " next_to_watch <%x>\n"
1817 " jiffies <%lx>\n"
1818 " next_to_watch.status <%x>\n",
1819 IXGB_READ_REG(&adapter->hw, TDH),
1820 IXGB_READ_REG(&adapter->hw, TDT),
1821 tx_ring->next_to_use,
1822 tx_ring->next_to_clean,
1823 tx_ring->buffer_info[eop].time_stamp,
1824 eop,
1825 jiffies,
1826 eop_desc->status);
1da177e4 1827 netif_stop_queue(netdev);
9b8118df 1828 }
1da177e4
LT		 1829 }
1830
1831 return cleaned;
1832}
1833
1834/**
1835 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1836 * @adapter: board private structure
1837 * @rx_desc: receive descriptor
1838 * @sk_buff: socket buffer with received data
1839 **/
1840
235949d1 1841static void
1da177e4 1842ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1843 struct ixgb_rx_desc *rx_desc,
1844 struct sk_buff *skb)
1da177e4
LT		 1845{
1846 /* Ignore Checksum bit is set OR
1847 * TCP Checksum has not been calculated
1848 */
03f83041 1849 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4
LT		 1850 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1851 skb->ip_summed = CHECKSUM_NONE;
1852 return;
1853 }
1854
1855 /* At this point we know the hardware did the TCP checksum */
1856 /* now look at the TCP checksum error bit */
03f83041 1857 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4
LT		 1858 /* let the stack verify checksum errors */
1859 skb->ip_summed = CHECKSUM_NONE;
1860 adapter->hw_csum_rx_error++;
1861 } else {
1862 /* TCP checksum is good */
1863 skb->ip_summed = CHECKSUM_UNNECESSARY;
1864 adapter->hw_csum_rx_good++;
1865 }
1866}
1867
1868/**
1869 * ixgb_clean_rx_irq - Send received data up the network stack,
1870 * @adapter: board private structure
1871 **/
1872
446490ca 1873static bool
1da177e4 1874ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1da177e4
LT		 1875{
1876 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1877 struct net_device *netdev = adapter->netdev;
1878 struct pci_dev *pdev = adapter->pdev;
1879 struct ixgb_rx_desc *rx_desc, *next_rxd;
1880 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1881 u32 length;
1da177e4 1882 unsigned int i, j;
fc2d14e3 1883 int cleaned_count = 0;
446490ca 1884 bool cleaned = false;
1da177e4
LT		 1885
1886 i = rx_ring->next_to_clean;
1887 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1888 buffer_info = &rx_ring->buffer_info[i];
1889
9a432992 1890 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
fc2d14e3 1891 struct sk_buff *skb;
f404de1c 1892 u8 status;
1da177e4 1893
03f83041 1894 if (*work_done >= work_to_do)
1da177e4
LT		 1895 break;
1896
1897 (*work_done)++;
f404de1c 1898 status = rx_desc->status;
1da177e4 1899 skb = buffer_info->skb;
1dfdd7df 1900 buffer_info->skb = NULL;
f404de1c 1901
fc2d14e3 1902 prefetch(skb->data - NET_IP_ALIGN);
1da177e4 1903
03f83041 1904 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 1905 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1906 prefetch(next_rxd);
1907
03f83041 1908 if ((j = i + 1) == rx_ring->count) j = 0;
1da177e4
LT		 1909 next2_buffer = &rx_ring->buffer_info[j];
1910 prefetch(next2_buffer);
1911
1912 next_buffer = &rx_ring->buffer_info[i];
1da177e4 1913
446490ca 1914 cleaned = true;
fc2d14e3 1915 cleaned_count++;
1da177e4
LT		 1916
1917 pci_unmap_single(pdev,
1918 buffer_info->dma,
1919 buffer_info->length,
1920 PCI_DMA_FROMDEVICE);
fc2d14e3 1921 buffer_info->dma = 0;
1da177e4
LT		 1922
1923 length = le16_to_cpu(rx_desc->length);
fc2d14e3 1924 rx_desc->length = 0;
1da177e4 1925
03f83041 1926 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 1927
1928 /* All receives must fit into a single buffer */
1929
1930 IXGB_DBG("Receive packet consumed multiple buffers "
1931 "length<%x>\n", length);
1932
1933 dev_kfree_skb_irq(skb);
f404de1c 1934 goto rxdesc_done;
1da177e4
LT		 1935 }
1936
0060c072
JB		 1937 if (unlikely(rx_desc->errors &
1938 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
1939 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 1940 dev_kfree_skb_irq(skb);
f404de1c 1941 goto rxdesc_done;
1da177e4
LT		 1942 }
1943
6b900bb4
AK		 1944 /* code added for copybreak, this should improve
1945 * performance for small packets with large amounts
1946 * of reassembly being done in the stack */
d9fed18b 1947 if (length < copybreak) {
6b900bb4 1948 struct sk_buff *new_skb =
5791704f 1949 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
6b900bb4
AK		 1950 if (new_skb) {
1951 skb_reserve(new_skb, NET_IP_ALIGN);
27d7ff46
ACM		 1952 skb_copy_to_linear_data_offset(new_skb,
1953 -NET_IP_ALIGN,
1954 (skb->data -
1955 NET_IP_ALIGN),
1956 (length +
1957 NET_IP_ALIGN));
6b900bb4
AK		 1958 /* save the skb in buffer_info as good */
1959 buffer_info->skb = skb;
1960 skb = new_skb;
1961 }
1962 }
1963 /* end copybreak code */
1964
1da177e4
LT		 1965 /* Good Receive */
1966 skb_put(skb, length);
1967
1968 /* Receive Checksum Offload */
1969 ixgb_rx_checksum(adapter, rx_desc, skb);
1970
1971 skb->protocol = eth_type_trans(skb, netdev);
03f83041 1972 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 1973 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
0060c072 1974 le16_to_cpu(rx_desc->special));
1da177e4
LT		 1975 } else {
1976 netif_receive_skb(skb);
1977 }
1da177e4
LT		 1978 netdev->last_rx = jiffies;
1979
f404de1c
MC		 1980rxdesc_done:
1981 /* clean up descriptor, might be written over by hw */
1da177e4 1982 rx_desc->status = 0;
1da177e4 1983
fc2d14e3
JB		 1984 /* return some buffers to hardware, one at a time is too slow */
1985 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
1986 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1987 cleaned_count = 0;
1988 }
1989
f404de1c 1990 /* use prefetched values */
1da177e4
LT		 1991 rx_desc = next_rxd;
1992 buffer_info = next_buffer;
1993 }
1994
1995 rx_ring->next_to_clean = i;
1996
fc2d14e3
JB		 1997 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
1998 if (cleaned_count)
1999 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1da177e4
LT		 2000
2001 return cleaned;
2002}
2003
2004/**
2005 * ixgb_alloc_rx_buffers - Replace used receive buffers
2006 * @adapter: address of board private structure
2007 **/
2008
2009static void
fc2d14e3 2010ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
1da177e4
LT		 2011{
2012 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2013 struct net_device *netdev = adapter->netdev;
2014 struct pci_dev *pdev = adapter->pdev;
2015 struct ixgb_rx_desc *rx_desc;
2016 struct ixgb_buffer *buffer_info;
2017 struct sk_buff *skb;
2018 unsigned int i;
1da177e4
LT		 2019 long cleancount;
2020
2021 i = rx_ring->next_to_use;
2022 buffer_info = &rx_ring->buffer_info[i];
2023 cleancount = IXGB_DESC_UNUSED(rx_ring);
2024
1da177e4 2025
41639fed 2026 /* leave three descriptors unused */
fc2d14e3 2027 while (--cleancount > 2 && cleaned_count--) {
1dfdd7df 2028 /* recycle! its good for you */
69c7a940
AK		 2029 skb = buffer_info->skb;
2030 if (skb) {
1dfdd7df
AK		 2031 skb_trim(skb, 0);
2032 goto map_skb;
2033 }
1da177e4 2034
69c7a940
AK		 2035 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2036 + NET_IP_ALIGN);
1dfdd7df 2037 if (unlikely(!skb)) {
1da177e4 2038 /* Better luck next round */
1dfdd7df 2039 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2040 break;
2041 }
2042
2043 /* Make buffer alignment 2 beyond a 16 byte boundary
2044 * this will result in a 16 byte aligned IP header after
2045 * the 14 byte MAC header is removed
2046 */
2047 skb_reserve(skb, NET_IP_ALIGN);
2048
1da177e4
LT		 2049 buffer_info->skb = skb;
2050 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df
AK		 2051map_skb:
2052 buffer_info->dma = pci_map_single(pdev,
2053 skb->data,
2054 adapter->rx_buffer_len,
2055 PCI_DMA_FROMDEVICE);
1da177e4 2056
1dfdd7df 2057 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2058 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2059 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2060 * this is the rest of the workaround for h/w double
41639fed
MC		 2061 * writeback. */
2062 rx_desc->status = 0;
1da177e4 2063
1da177e4 2064
03f83041 2065 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2066 buffer_info = &rx_ring->buffer_info[i];
2067 }
2068
1dfdd7df
AK		 2069 if (likely(rx_ring->next_to_use != i)) {
2070 rx_ring->next_to_use = i;
2071 if (unlikely(i-- == 0))
2072 i = (rx_ring->count - 1);
2073
2074 /* Force memory writes to complete before letting h/w
2075 * know there are new descriptors to fetch. (Only
2076 * applicable for weak-ordered memory model archs, such
2077 * as IA-64). */
2078 wmb();
2079 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2080 }
1da177e4
LT		 2081}
2082
2083/**
2084 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
0060c072 2085 *
1da177e4
LT		 2086 * @param netdev network interface device structure
2087 * @param grp indicates to enable or disable tagging/stripping
2088 **/
2089static void
2090ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2091{
8908c6cd 2092 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2093 u32 ctrl, rctl;
1da177e4
LT		 2094
2095 ixgb_irq_disable(adapter);
2096 adapter->vlgrp = grp;
2097
03f83041 2098 if (grp) {
1da177e4
LT		 2099 /* enable VLAN tag insert/strip */
2100 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2101 ctrl |= IXGB_CTRL0_VME;
2102 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2103
2104 /* enable VLAN receive filtering */
2105
2106 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2107 rctl |= IXGB_RCTL_VFE;
2108 rctl &= ~IXGB_RCTL_CFIEN;
2109 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2110 } else {
2111 /* disable VLAN tag insert/strip */
2112
2113 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2114 ctrl &= ~IXGB_CTRL0_VME;
2115 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2116
2117 /* disable VLAN filtering */
2118
2119 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2120 rctl &= ~IXGB_RCTL_VFE;
2121 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2122 }
2123
bab2bce7
JB		 2124 /* don't enable interrupts unless we are UP */
2125 if (adapter->netdev->flags & IFF_UP)
2126 ixgb_irq_enable(adapter);
1da177e4
LT		 2127}
2128
2129static void
222441a6 2130ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2131{
8908c6cd 2132 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2133 u32 vfta, index;
1da177e4
LT		 2134
2135 /* add VID to filter table */
2136
2137 index = (vid >> 5) & 0x7F;
2138 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2139 vfta |= (1 << (vid & 0x1F));
2140 ixgb_write_vfta(&adapter->hw, index, vfta);
2141}
2142
2143static void
222441a6 2144ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2145{
8908c6cd 2146 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2147 u32 vfta, index;
1da177e4
LT		 2148
2149 ixgb_irq_disable(adapter);
2150
5c15bdec 2151 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 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 2156
bab2bce7 2157 /* remove VID from filter table */
1da177e4
LT		 2158
2159 index = (vid >> 5) & 0x7F;
2160 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2161 vfta &= ~(1 << (vid & 0x1F));
2162 ixgb_write_vfta(&adapter->hw, index, vfta);
2163}
2164
2165static void
2166ixgb_restore_vlan(struct ixgb_adapter *adapter)
2167{
2168 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2169
03f83041 2170 if (adapter->vlgrp) {
222441a6 2171 u16 vid;
1459336d 2172 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
03f83041 2173 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2174 continue;
2175 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2176 }
2177 }
2178}
2179
1da177e4
LT		 2180#ifdef CONFIG_NET_POLL_CONTROLLER
2181/*
2182 * Polling 'interrupt' - used by things like netconsole to send skbs
2183 * without having to re-enable interrupts. It's not called while
2184 * the interrupt routine is executing.
2185 */
2186
2187static void ixgb_netpoll(struct net_device *dev)
2188{
f990b426 2189 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2190
1da177e4 2191 disable_irq(adapter->pdev->irq);
7d12e780 2192 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2193 enable_irq(adapter->pdev->irq);
2194}
2195#endif
2196
01748fbb
LV		 2197/**
2198 * ixgb_io_error_detected() - called when PCI error is detected
2199 * @pdev pointer to pci device with error
2200 * @state pci channel state after error
2201 *
2202 * This callback is called by the PCI subsystem whenever
2203 * a PCI bus error is detected.
2204 */
0060c072
JB		 2205static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2206 enum pci_channel_state state)
01748fbb
LV		 2207{
2208 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2209 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2210
03f83041 2211 if (netif_running(netdev))
446490ca 2212 ixgb_down(adapter, true);
01748fbb
LV		 2213
2214 pci_disable_device(pdev);
2215
2216 /* Request a slot reset. */
2217 return PCI_ERS_RESULT_NEED_RESET;
2218}
2219
2220/**
2221 * ixgb_io_slot_reset - called after the pci bus has been reset.
2222 * @pdev pointer to pci device with error
2223 *
52035bdb 2224 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2225 * Basically, this tries to restart the card from scratch.
2226 * This is a shortened version of the device probe/discovery code,
2227 * it resembles the first-half of the ixgb_probe() routine.
2228 */
0060c072 2229static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2230{
2231 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2232 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2233
03f83041 2234 if (pci_enable_device(pdev)) {
01748fbb
LV		 2235 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2236 return PCI_ERS_RESULT_DISCONNECT;
2237 }
2238
2239 /* Perform card reset only on one instance of the card */
2240 if (0 != PCI_FUNC (pdev->devfn))
2241 return PCI_ERS_RESULT_RECOVERED;
2242
2243 pci_set_master(pdev);
2244
2245 netif_carrier_off(netdev);
2246 netif_stop_queue(netdev);
2247 ixgb_reset(adapter);
2248
2249 /* Make sure the EEPROM is good */
03f83041 2250 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
01748fbb
LV		 2251 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2252 return PCI_ERS_RESULT_DISCONNECT;
2253 }
2254 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2255 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2256
03f83041 2257 if (!is_valid_ether_addr(netdev->perm_addr)) {
01748fbb
LV		 2258 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2259 return PCI_ERS_RESULT_DISCONNECT;
2260 }
2261
2262 return PCI_ERS_RESULT_RECOVERED;
2263}
2264
2265/**
2266 * ixgb_io_resume - called when its OK to resume normal operations
2267 * @pdev pointer to pci device with error
2268 *
2269 * The error recovery driver tells us that its OK to resume
2270 * normal operation. Implementation resembles the second-half
2271 * of the ixgb_probe() routine.
2272 */
0060c072 2273static void ixgb_io_resume(struct pci_dev *pdev)
01748fbb
LV		 2274{
2275 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2276 struct ixgb_adapter *adapter = netdev_priv(netdev);
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LV		 2277
2278 pci_set_master(pdev);
2279
03f83041
JB		 2280 if (netif_running(netdev)) {
2281 if (ixgb_up(adapter)) {
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LV		 2282 printk ("ixgb: can't bring device back up after reset\n");
2283 return;
2284 }
2285 }
2286
2287 netif_device_attach(netdev);
2288 mod_timer(&adapter->watchdog_timer, jiffies);
2289}
2290
1da177e4 2291/* ixgb_main.c */
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