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ixgb: fix spelling errors
[deliverable/linux.git] / drivers / net / ixgb / ixgb_main.c
CommitLineData
1da177e4
LT		 1/*******************************************************************************
2
0abb6eb1
AK		 3 Intel PRO/10GbE Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
1da177e4 13 more details.
0abb6eb1 14
1da177e4 15 You should have received a copy of the GNU General Public License along with
0abb6eb1
AK		 16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
1da177e4
LT		 22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
0abb6eb1 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
1da177e4
LT		 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
29#include "ixgb.h"
30
1da177e4 31char ixgb_driver_name[] = "ixgb";
e9ab1d14 32static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
1da177e4
LT		 33
34#ifndef CONFIG_IXGB_NAPI
35#define DRIVERNAPI
36#else
37#define DRIVERNAPI "-NAPI"
38#endif
8b32e63d 39#define DRV_VERSION "1.0.126-k4"DRIVERNAPI
273dc74e
SH		 40const char ixgb_driver_version[] = DRV_VERSION;
41static const char ixgb_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
1da177e4 42
d9fed18b
JB		 43#define IXGB_CB_LENGTH 256
44static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
45module_param(copybreak, uint, 0644);
46MODULE_PARM_DESC(copybreak,
47 "Maximum size of packet that is copied to a new buffer on receive");
48
1da177e4
LT		 49/* ixgb_pci_tbl - PCI Device ID Table
50 *
51 * Wildcard entries (PCI_ANY_ID) should come last
52 * Last entry must be all 0s
53 *
54 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
55 * Class, Class Mask, private data (not used) }
56 */
57static struct pci_device_id ixgb_pci_tbl[] = {
58 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
59 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
940829e2
AK		 60 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
61 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1da177e4
LT		 62 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
63 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
7490d71a 64 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
1da177e4
LT		 65 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
66
67 /* required last entry */
68 {0,}
69};
70
71MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
72
73/* Local Function Prototypes */
1da177e4
LT		 74static int ixgb_init_module(void);
75static void ixgb_exit_module(void);
76static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
77static void __devexit ixgb_remove(struct pci_dev *pdev);
78static int ixgb_sw_init(struct ixgb_adapter *adapter);
79static int ixgb_open(struct net_device *netdev);
80static int ixgb_close(struct net_device *netdev);
81static void ixgb_configure_tx(struct ixgb_adapter *adapter);
82static void ixgb_configure_rx(struct ixgb_adapter *adapter);
83static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
84static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
85static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
86static void ixgb_set_multi(struct net_device *netdev);
87static void ixgb_watchdog(unsigned long data);
88static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
89static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
90static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
91static int ixgb_set_mac(struct net_device *netdev, void *p);
7d12e780 92static irqreturn_t ixgb_intr(int irq, void *data);
446490ca 93static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
ac79c82e 94
1da177e4 95#ifdef CONFIG_IXGB_NAPI
7490d71a
JB		 96static int ixgb_clean(struct napi_struct *, int);
97static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
1da177e4 98#else
7490d71a 99static bool ixgb_clean_rx_irq(struct ixgb_adapter *);
1da177e4 100#endif
7490d71a
JB		 101static void ixgb_alloc_rx_buffers(struct ixgb_adapter *);
102
1da177e4 103static void ixgb_tx_timeout(struct net_device *dev);
c4028958 104static void ixgb_tx_timeout_task(struct work_struct *work);
7490d71a 105
1da177e4 106static void ixgb_vlan_rx_register(struct net_device *netdev,
7490d71a 107 struct vlan_group *grp);
222441a6
JP		 108static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
109static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
1da177e4
LT		 110static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
111
1da177e4
LT		 112#ifdef CONFIG_NET_POLL_CONTROLLER
113/* for netdump / net console */
114static void ixgb_netpoll(struct net_device *dev);
115#endif
116
01748fbb 117static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
7490d71a 118 enum pci_channel_state state);
01748fbb
LV		 119static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
120static void ixgb_io_resume (struct pci_dev *pdev);
1da177e4 121
01748fbb
LV		 122static struct pci_error_handlers ixgb_err_handler = {
123 .error_detected = ixgb_io_error_detected,
124 .slot_reset = ixgb_io_slot_reset,
125 .resume = ixgb_io_resume,
126};
127
1da177e4 128static struct pci_driver ixgb_driver = {
c2eba932 129 .name = ixgb_driver_name,
1da177e4 130 .id_table = ixgb_pci_tbl,
c2eba932
MC		 131 .probe = ixgb_probe,
132 .remove = __devexit_p(ixgb_remove),
01748fbb 133 .err_handler = &ixgb_err_handler
1da177e4
LT		 134};
135
136MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
137MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
138MODULE_LICENSE("GPL");
01e5abc2 139MODULE_VERSION(DRV_VERSION);
1da177e4 140
ec9c3f5d
AK		 141#define DEFAULT_DEBUG_LEVEL_SHIFT 3
142static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
143module_param(debug, int, 0);
144MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
145
1da177e4
LT		 146/**
147 * ixgb_init_module - Driver Registration Routine
148 *
149 * ixgb_init_module is the first routine called when the driver is
150 * loaded. All it does is register with the PCI subsystem.
151 **/
152
153static int __init
154ixgb_init_module(void)
155{
1da177e4
LT		 156 printk(KERN_INFO "%s - version %s\n",
157 ixgb_driver_string, ixgb_driver_version);
158
159 printk(KERN_INFO "%s\n", ixgb_copyright);
160
29917620 161 return pci_register_driver(&ixgb_driver);
1da177e4
LT		 162}
163
164module_init(ixgb_init_module);
165
166/**
167 * ixgb_exit_module - Driver Exit Cleanup Routine
168 *
169 * ixgb_exit_module is called just before the driver is removed
170 * from memory.
171 **/
172
173static void __exit
174ixgb_exit_module(void)
175{
1da177e4
LT		 176 pci_unregister_driver(&ixgb_driver);
177}
178
179module_exit(ixgb_exit_module);
180
181/**
182 * ixgb_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
184 **/
185
235949d1 186static void
1da177e4
LT		 187ixgb_irq_disable(struct ixgb_adapter *adapter)
188{
1da177e4
LT		 189 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
190 IXGB_WRITE_FLUSH(&adapter->hw);
191 synchronize_irq(adapter->pdev->irq);
192}
193
194/**
195 * ixgb_irq_enable - Enable default interrupt generation settings
196 * @adapter: board private structure
197 **/
198
235949d1 199static void
1da177e4
LT		 200ixgb_irq_enable(struct ixgb_adapter *adapter)
201{
9c61a9dc
JB		 202 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
203 IXGB_INT_TXDW | IXGB_INT_LSC;
204 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
205 val |= IXGB_INT_GPI0;
206 IXGB_WRITE_REG(&adapter->hw, IMS, val);
207 IXGB_WRITE_FLUSH(&adapter->hw);
1da177e4
LT		 208}
209
210int
211ixgb_up(struct ixgb_adapter *adapter)
212{
213 struct net_device *netdev = adapter->netdev;
fb136c07 214 int err, irq_flags = IRQF_SHARED;
1da177e4
LT		 215 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
216 struct ixgb_hw *hw = &adapter->hw;
217
218 /* hardware has been reset, we need to reload some things */
219
8556f0d1 220 ixgb_rar_set(hw, netdev->dev_addr, 0);
1da177e4
LT		 221 ixgb_set_multi(netdev);
222
223 ixgb_restore_vlan(adapter);
224
225 ixgb_configure_tx(adapter);
226 ixgb_setup_rctl(adapter);
227 ixgb_configure_rx(adapter);
228 ixgb_alloc_rx_buffers(adapter);
229
e59d1696
AK		 230 /* disable interrupts and get the hardware into a known state */
231 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
232
fb136c07
AK		 233 /* only enable MSI if bus is in PCI-X mode */
234 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
235 err = pci_enable_msi(adapter->pdev);
236 if (!err) {
237 adapter->have_msi = 1;
238 irq_flags = 0;
239 }
1da177e4
LT		 240 /* proceed to try to request regular interrupt */
241 }
1da177e4 242
fb136c07
AK		 243 err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
244 netdev->name, netdev);
245 if (err) {
246 if (adapter->have_msi)
247 pci_disable_msi(adapter->pdev);
ec9c3f5d
AK		 248 DPRINTK(PROBE, ERR,
249 "Unable to allocate interrupt Error: %d\n", err);
1da177e4 250 return err;
ec9c3f5d 251 }
1da177e4 252
03f83041 253 if ((hw->max_frame_size != max_frame) ||
1da177e4
LT		 254 (hw->max_frame_size !=
255 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
256
257 hw->max_frame_size = max_frame;
258
259 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
260
03f83041 261 if (hw->max_frame_size >
1da177e4 262 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
222441a6 263 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
1da177e4 264
03f83041 265 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
1da177e4
LT		 266 ctrl0 |= IXGB_CTRL0_JFE;
267 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
268 }
269 }
270 }
271
bab2bce7 272 clear_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 273
274#ifdef CONFIG_IXGB_NAPI
bea3348e 275 napi_enable(&adapter->napi);
1da177e4 276#endif
e59d1696
AK		 277 ixgb_irq_enable(adapter);
278
bab2bce7
JB		 279 mod_timer(&adapter->watchdog_timer, jiffies);
280
1da177e4
LT		 281 return 0;
282}
283
284void
446490ca 285ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
1da177e4
LT		 286{
287 struct net_device *netdev = adapter->netdev;
288
bab2bce7
JB		 289 /* prevent the interrupt handler from restarting watchdog */
290 set_bit(__IXGB_DOWN, &adapter->flags);
291
49d85c50
DM		 292#ifdef CONFIG_IXGB_NAPI
293 napi_disable(&adapter->napi);
49d85c50 294#endif
bab2bce7 295 /* waiting for NAPI to complete can re-enable interrupts */
1da177e4
LT		 296 ixgb_irq_disable(adapter);
297 free_irq(adapter->pdev->irq, netdev);
fb136c07
AK		 298
299 if (adapter->have_msi)
1da177e4
LT		 300 pci_disable_msi(adapter->pdev);
301
03f83041 302 if (kill_watchdog)
1da177e4 303 del_timer_sync(&adapter->watchdog_timer);
49d85c50 304
1da177e4
LT		 305 adapter->link_speed = 0;
306 adapter->link_duplex = 0;
307 netif_carrier_off(netdev);
308 netif_stop_queue(netdev);
309
310 ixgb_reset(adapter);
311 ixgb_clean_tx_ring(adapter);
312 ixgb_clean_rx_ring(adapter);
313}
314
315void
316ixgb_reset(struct ixgb_adapter *adapter)
317{
3fd7131f 318 struct ixgb_hw *hw = &adapter->hw;
1da177e4 319
3fd7131f
MW		 320 ixgb_adapter_stop(hw);
321 if (!ixgb_init_hw(hw))
ec9c3f5d 322 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
3fd7131f
MW		 323
324 /* restore frame size information */
325 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
326 if (hw->max_frame_size >
327 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
328 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
329 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
330 ctrl0 |= IXGB_CTRL0_JFE;
331 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
332 }
333 }
1da177e4
LT		 334}
335
336/**
337 * ixgb_probe - Device Initialization Routine
338 * @pdev: PCI device information struct
339 * @ent: entry in ixgb_pci_tbl
340 *
341 * Returns 0 on success, negative on failure
342 *
343 * ixgb_probe initializes an adapter identified by a pci_dev structure.
344 * The OS initialization, configuring of the adapter private structure,
345 * and a hardware reset occur.
346 **/
347
348static int __devinit
0060c072 349ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 350{
351 struct net_device *netdev = NULL;
352 struct ixgb_adapter *adapter;
353 static int cards_found = 0;
1da177e4
LT		 354 int pci_using_dac;
355 int i;
356 int err;
357
03f83041 358 if ((err = pci_enable_device(pdev)))
1da177e4
LT		 359 return err;
360
03f83041 361 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
c91e468a 362 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
1da177e4
LT		 363 pci_using_dac = 1;
364 } else {
03f83041 365 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
c91e468a 366 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
ec9c3f5d
AK		 367 printk(KERN_ERR
368 "ixgb: No usable DMA configuration, aborting\n");
c91e468a 369 goto err_dma_mask;
1da177e4
LT		 370 }
371 pci_using_dac = 0;
372 }
373
03f83041 374 if ((err = pci_request_regions(pdev, ixgb_driver_name)))
c91e468a 375 goto err_request_regions;
1da177e4
LT		 376
377 pci_set_master(pdev);
378
379 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
03f83041 380 if (!netdev) {
1da177e4
LT		 381 err = -ENOMEM;
382 goto err_alloc_etherdev;
383 }
384
1da177e4
LT		 385 SET_NETDEV_DEV(netdev, &pdev->dev);
386
387 pci_set_drvdata(pdev, netdev);
8908c6cd 388 adapter = netdev_priv(netdev);
1da177e4
LT		 389 adapter->netdev = netdev;
390 adapter->pdev = pdev;
391 adapter->hw.back = adapter;
ec9c3f5d 392 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
1da177e4 393
e539e466
JB		 394 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, BAR_0),
395 pci_resource_len(pdev, BAR_0));
396 if (!adapter->hw.hw_addr) {
1da177e4
LT		 397 err = -EIO;
398 goto err_ioremap;
399 }
400
401 for(i = BAR_1; i <= BAR_5; i++) {
03f83041 402 if (pci_resource_len(pdev, i) == 0)
1da177e4 403 continue;
03f83041 404 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 405 adapter->hw.io_base = pci_resource_start(pdev, i);
406 break;
407 }
408 }
409
410 netdev->open = &ixgb_open;
411 netdev->stop = &ixgb_close;
412 netdev->hard_start_xmit = &ixgb_xmit_frame;
413 netdev->get_stats = &ixgb_get_stats;
414 netdev->set_multicast_list = &ixgb_set_multi;
415 netdev->set_mac_address = &ixgb_set_mac;
416 netdev->change_mtu = &ixgb_change_mtu;
417 ixgb_set_ethtool_ops(netdev);
418 netdev->tx_timeout = &ixgb_tx_timeout;
9b8118df 419 netdev->watchdog_timeo = 5 * HZ;
1da177e4 420#ifdef CONFIG_IXGB_NAPI
bea3348e 421 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4
LT		 422#endif
423 netdev->vlan_rx_register = ixgb_vlan_rx_register;
424 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
425 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
426#ifdef CONFIG_NET_POLL_CONTROLLER
427 netdev->poll_controller = ixgb_netpoll;
428#endif
429
0eb5a34c 430 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 431
432 adapter->bd_number = cards_found;
433 adapter->link_speed = 0;
434 adapter->link_duplex = 0;
435
436 /* setup the private structure */
437
03f83041 438 if ((err = ixgb_sw_init(adapter)))
1da177e4
LT		 439 goto err_sw_init;
440
441 netdev->features = NETIF_F_SG |
442 NETIF_F_HW_CSUM |
443 NETIF_F_HW_VLAN_TX |
444 NETIF_F_HW_VLAN_RX |
445 NETIF_F_HW_VLAN_FILTER;
1da177e4 446 netdev->features |= NETIF_F_TSO;
1da177e4 447
03f83041 448 if (pci_using_dac)
1da177e4
LT		 449 netdev->features |= NETIF_F_HIGHDMA;
450
451 /* make sure the EEPROM is good */
452
03f83041 453 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
ec9c3f5d 454 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 455 err = -EIO;
456 goto err_eeprom;
457 }
458
459 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
df859c51 460 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1da177e4 461
03f83041 462 if (!is_valid_ether_addr(netdev->perm_addr)) {
ec9c3f5d 463 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1da177e4
LT		 464 err = -EIO;
465 goto err_eeprom;
466 }
467
468 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
469
470 init_timer(&adapter->watchdog_timer);
471 adapter->watchdog_timer.function = &ixgb_watchdog;
472 adapter->watchdog_timer.data = (unsigned long)adapter;
473
c4028958 474 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 475
ec9c3f5d 476 strcpy(netdev->name, "eth%d");
03f83041 477 if ((err = register_netdev(netdev)))
1da177e4
LT		 478 goto err_register;
479
480 /* we're going to reset, so assume we have no link for now */
481
482 netif_carrier_off(netdev);
483 netif_stop_queue(netdev);
484
ec9c3f5d 485 DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
1da177e4
LT		 486 ixgb_check_options(adapter);
487 /* reset the hardware with the new settings */
488
489 ixgb_reset(adapter);
490
491 cards_found++;
492 return 0;
493
494err_register:
495err_sw_init:
496err_eeprom:
497 iounmap(adapter->hw.hw_addr);
498err_ioremap:
499 free_netdev(netdev);
500err_alloc_etherdev:
501 pci_release_regions(pdev);
c91e468a
AS		 502err_request_regions:
503err_dma_mask:
504 pci_disable_device(pdev);
1da177e4
LT		 505 return err;
506}
507
508/**
509 * ixgb_remove - Device Removal Routine
510 * @pdev: PCI device information struct
511 *
512 * ixgb_remove is called by the PCI subsystem to alert the driver
513 * that it should release a PCI device. The could be caused by a
514 * Hot-Plug event, or because the driver is going to be removed from
515 * memory.
516 **/
517
518static void __devexit
519ixgb_remove(struct pci_dev *pdev)
520{
521 struct net_device *netdev = pci_get_drvdata(pdev);
8908c6cd 522 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 523
12579697
JB		 524 flush_scheduled_work();
525
1da177e4
LT		 526 unregister_netdev(netdev);
527
528 iounmap(adapter->hw.hw_addr);
529 pci_release_regions(pdev);
530
531 free_netdev(netdev);
532}
533
534/**
535 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
536 * @adapter: board private structure to initialize
537 *
538 * ixgb_sw_init initializes the Adapter private data structure.
539 * Fields are initialized based on PCI device information and
540 * OS network device settings (MTU size).
541 **/
542
543static int __devinit
544ixgb_sw_init(struct ixgb_adapter *adapter)
545{
546 struct ixgb_hw *hw = &adapter->hw;
547 struct net_device *netdev = adapter->netdev;
548 struct pci_dev *pdev = adapter->pdev;
549
550 /* PCI config space info */
551
552 hw->vendor_id = pdev->vendor;
553 hw->device_id = pdev->device;
554 hw->subsystem_vendor_id = pdev->subsystem_vendor;
555 hw->subsystem_id = pdev->subsystem_device;
556
1da177e4 557 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
a3dc3da0 558 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
1da177e4 559
03f83041 560 if ((hw->device_id == IXGB_DEVICE_ID_82597EX)
940829e2
AK		 561 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
562 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
563 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
0060c072 564 hw->mac_type = ixgb_82597;
1da177e4
LT		 565 else {
566 /* should never have loaded on this device */
ec9c3f5d 567 DPRINTK(PROBE, ERR, "unsupported device id\n");
1da177e4
LT		 568 }
569
570 /* enable flow control to be programmed */
571 hw->fc.send_xon = 1;
572
bab2bce7 573 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 574 return 0;
575}
576
577/**
578 * ixgb_open - Called when a network interface is made active
579 * @netdev: network interface device structure
580 *
581 * Returns 0 on success, negative value on failure
582 *
583 * The open entry point is called when a network interface is made
584 * active by the system (IFF_UP). At this point all resources needed
585 * for transmit and receive operations are allocated, the interrupt
586 * handler is registered with the OS, the watchdog timer is started,
587 * and the stack is notified that the interface is ready.
588 **/
589
590static int
591ixgb_open(struct net_device *netdev)
592{
8908c6cd 593 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 594 int err;
595
596 /* allocate transmit descriptors */
597
03f83041 598 if ((err = ixgb_setup_tx_resources(adapter)))
1da177e4
LT		 599 goto err_setup_tx;
600
601 /* allocate receive descriptors */
602
03f83041 603 if ((err = ixgb_setup_rx_resources(adapter)))
1da177e4
LT		 604 goto err_setup_rx;
605
03f83041 606 if ((err = ixgb_up(adapter)))
1da177e4
LT		 607 goto err_up;
608
609 return 0;
610
611err_up:
612 ixgb_free_rx_resources(adapter);
613err_setup_rx:
614 ixgb_free_tx_resources(adapter);
615err_setup_tx:
616 ixgb_reset(adapter);
617
618 return err;
619}
620
621/**
622 * ixgb_close - Disables a network interface
623 * @netdev: network interface device structure
624 *
625 * Returns 0, this is not allowed to fail
626 *
627 * The close entry point is called when an interface is de-activated
628 * by the OS. The hardware is still under the drivers control, but
629 * needs to be disabled. A global MAC reset is issued to stop the
630 * hardware, and all transmit and receive resources are freed.
631 **/
632
633static int
634ixgb_close(struct net_device *netdev)
635{
8908c6cd 636 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 637
446490ca 638 ixgb_down(adapter, true);
1da177e4
LT		 639
640 ixgb_free_tx_resources(adapter);
641 ixgb_free_rx_resources(adapter);
642
643 return 0;
644}
645
646/**
647 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
648 * @adapter: board private structure
649 *
650 * Return 0 on success, negative on failure
651 **/
652
653int
654ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
655{
656 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
657 struct pci_dev *pdev = adapter->pdev;
658 int size;
659
660 size = sizeof(struct ixgb_buffer) * txdr->count;
661 txdr->buffer_info = vmalloc(size);
03f83041 662 if (!txdr->buffer_info) {
ec9c3f5d
AK		 663 DPRINTK(PROBE, ERR,
664 "Unable to allocate transmit descriptor ring memory\n");
1da177e4
LT		 665 return -ENOMEM;
666 }
667 memset(txdr->buffer_info, 0, size);
668
669 /* round up to nearest 4K */
670
671 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 672 txdr->size = ALIGN(txdr->size, 4096);
1da177e4
LT		 673
674 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
03f83041 675 if (!txdr->desc) {
1da177e4 676 vfree(txdr->buffer_info);
ec9c3f5d
AK		 677 DPRINTK(PROBE, ERR,
678 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 679 return -ENOMEM;
680 }
681 memset(txdr->desc, 0, txdr->size);
682
683 txdr->next_to_use = 0;
684 txdr->next_to_clean = 0;
685
686 return 0;
687}
688
689/**
690 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
691 * @adapter: board private structure
692 *
693 * Configure the Tx unit of the MAC after a reset.
694 **/
695
696static void
697ixgb_configure_tx(struct ixgb_adapter *adapter)
698{
222441a6
JP		 699 u64 tdba = adapter->tx_ring.dma;
700 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
701 u32 tctl;
1da177e4
LT		 702 struct ixgb_hw *hw = &adapter->hw;
703
0060c072
JB		 704 /* Setup the Base and Length of the Tx Descriptor Ring
705 * tx_ring.dma can be either a 32 or 64 bit value
1da177e4
LT		 706 */
707
708 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
709 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
710
711 IXGB_WRITE_REG(hw, TDLEN, tdlen);
712
713 /* Setup the HW Tx Head and Tail descriptor pointers */
714
715 IXGB_WRITE_REG(hw, TDH, 0);
716 IXGB_WRITE_REG(hw, TDT, 0);
717
718 /* don't set up txdctl, it induces performance problems if configured
719 * incorrectly */
720 /* Set the Tx Interrupt Delay register */
721
722 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
723
724 /* Program the Transmit Control Register */
725
726 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
727 IXGB_WRITE_REG(hw, TCTL, tctl);
728
729 /* Setup Transmit Descriptor Settings for this adapter */
730 adapter->tx_cmd_type =
0060c072
JB		 731 IXGB_TX_DESC_TYPE |
732 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
1da177e4
LT		 733}
734
735/**
736 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
737 * @adapter: board private structure
738 *
739 * Returns 0 on success, negative on failure
740 **/
741
742int
743ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
744{
745 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
746 struct pci_dev *pdev = adapter->pdev;
747 int size;
748
749 size = sizeof(struct ixgb_buffer) * rxdr->count;
750 rxdr->buffer_info = vmalloc(size);
03f83041 751 if (!rxdr->buffer_info) {
ec9c3f5d
AK		 752 DPRINTK(PROBE, ERR,
753 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 754 return -ENOMEM;
755 }
756 memset(rxdr->buffer_info, 0, size);
757
758 /* Round up to nearest 4K */
759
760 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 761 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4
LT		 762
763 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
764
03f83041 765 if (!rxdr->desc) {
1da177e4 766 vfree(rxdr->buffer_info);
ec9c3f5d
AK		 767 DPRINTK(PROBE, ERR,
768 "Unable to allocate receive descriptors\n");
1da177e4
LT		 769 return -ENOMEM;
770 }
771 memset(rxdr->desc, 0, rxdr->size);
772
773 rxdr->next_to_clean = 0;
774 rxdr->next_to_use = 0;
775
776 return 0;
777}
778
779/**
780 * ixgb_setup_rctl - configure the receive control register
781 * @adapter: Board private structure
782 **/
783
784static void
785ixgb_setup_rctl(struct ixgb_adapter *adapter)
786{
222441a6 787 u32 rctl;
1da177e4
LT		 788
789 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
790
791 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
792
793 rctl |=
0060c072
JB		 794 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
795 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
1da177e4
LT		 796 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
797
798 rctl |= IXGB_RCTL_SECRC;
799
3f3dc0dd 800 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 801 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 802 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 803 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 804 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 805 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 806 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 807 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 808
809 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
810}
811
812/**
813 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
814 * @adapter: board private structure
815 *
816 * Configure the Rx unit of the MAC after a reset.
817 **/
818
819static void
820ixgb_configure_rx(struct ixgb_adapter *adapter)
821{
222441a6
JP		 822 u64 rdba = adapter->rx_ring.dma;
823 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 824 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 825 u32 rctl;
826 u32 rxcsum;
1da177e4
LT		 827
828 /* make sure receives are disabled while setting up the descriptors */
829
830 rctl = IXGB_READ_REG(hw, RCTL);
831 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
832
833 /* set the Receive Delay Timer Register */
834
835 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
836
837 /* Setup the Base and Length of the Rx Descriptor Ring */
838
839 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
840 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
841
842 IXGB_WRITE_REG(hw, RDLEN, rdlen);
843
844 /* Setup the HW Rx Head and Tail Descriptor Pointers */
845 IXGB_WRITE_REG(hw, RDH, 0);
846 IXGB_WRITE_REG(hw, RDT, 0);
847
4360386f
JB		 848 /* due to the hardware errata with RXDCTL, we are unable to use any of
849 * the performance enhancing features of it without causing other
850 * subtle bugs, some of the bugs could include receive length
851 * corruption at high data rates (WTHRESH > 0) and/or receive
852 * descriptor ring irregularites (particularly in hardware cache) */
853 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 854
855 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 856 if (adapter->rx_csum) {
1da177e4
LT		 857 rxcsum = IXGB_READ_REG(hw, RXCSUM);
858 rxcsum |= IXGB_RXCSUM_TUOFL;
859 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
860 }
861
862 /* Enable Receives */
863
864 IXGB_WRITE_REG(hw, RCTL, rctl);
865}
866
867/**
868 * ixgb_free_tx_resources - Free Tx Resources
869 * @adapter: board private structure
870 *
871 * Free all transmit software resources
872 **/
873
874void
875ixgb_free_tx_resources(struct ixgb_adapter *adapter)
876{
877 struct pci_dev *pdev = adapter->pdev;
878
879 ixgb_clean_tx_ring(adapter);
880
881 vfree(adapter->tx_ring.buffer_info);
882 adapter->tx_ring.buffer_info = NULL;
883
884 pci_free_consistent(pdev, adapter->tx_ring.size,
885 adapter->tx_ring.desc, adapter->tx_ring.dma);
886
887 adapter->tx_ring.desc = NULL;
888}
889
235949d1 890static void
1da177e4 891ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
0060c072 892 struct ixgb_buffer *buffer_info)
1da177e4
LT		 893{
894 struct pci_dev *pdev = adapter->pdev;
1dfdd7df
AK		 895
896 if (buffer_info->dma)
897 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
898 PCI_DMA_TODEVICE);
899
900 if (buffer_info->skb)
1da177e4 901 dev_kfree_skb_any(buffer_info->skb);
1dfdd7df
AK		 902
903 buffer_info->skb = NULL;
904 buffer_info->dma = 0;
905 buffer_info->time_stamp = 0;
906 /* these fields must always be initialized in tx
907 * buffer_info->length = 0;
908 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 909}
910
911/**
912 * ixgb_clean_tx_ring - Free Tx Buffers
913 * @adapter: board private structure
914 **/
915
916static void
917ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
918{
919 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
920 struct ixgb_buffer *buffer_info;
921 unsigned long size;
922 unsigned int i;
923
924 /* Free all the Tx ring sk_buffs */
925
926 for(i = 0; i < tx_ring->count; i++) {
927 buffer_info = &tx_ring->buffer_info[i];
928 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
929 }
930
931 size = sizeof(struct ixgb_buffer) * tx_ring->count;
932 memset(tx_ring->buffer_info, 0, size);
933
934 /* Zero out the descriptor ring */
935
936 memset(tx_ring->desc, 0, tx_ring->size);
937
938 tx_ring->next_to_use = 0;
939 tx_ring->next_to_clean = 0;
940
941 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
942 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
943}
944
945/**
946 * ixgb_free_rx_resources - Free Rx Resources
947 * @adapter: board private structure
948 *
949 * Free all receive software resources
950 **/
951
952void
953ixgb_free_rx_resources(struct ixgb_adapter *adapter)
954{
955 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
956 struct pci_dev *pdev = adapter->pdev;
957
958 ixgb_clean_rx_ring(adapter);
959
960 vfree(rx_ring->buffer_info);
961 rx_ring->buffer_info = NULL;
962
963 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
964
965 rx_ring->desc = NULL;
966}
967
968/**
969 * ixgb_clean_rx_ring - Free Rx Buffers
970 * @adapter: board private structure
971 **/
972
973static void
974ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
975{
976 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
977 struct ixgb_buffer *buffer_info;
978 struct pci_dev *pdev = adapter->pdev;
979 unsigned long size;
980 unsigned int i;
981
982 /* Free all the Rx ring sk_buffs */
983
984 for(i = 0; i < rx_ring->count; i++) {
985 buffer_info = &rx_ring->buffer_info[i];
03f83041 986 if (buffer_info->skb) {
1da177e4
LT		 987
988 pci_unmap_single(pdev,
989 buffer_info->dma,
990 buffer_info->length,
991 PCI_DMA_FROMDEVICE);
992
993 dev_kfree_skb(buffer_info->skb);
994
995 buffer_info->skb = NULL;
996 }
997 }
998
999 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1000 memset(rx_ring->buffer_info, 0, size);
1001
1002 /* Zero out the descriptor ring */
1003
1004 memset(rx_ring->desc, 0, rx_ring->size);
1005
1006 rx_ring->next_to_clean = 0;
1007 rx_ring->next_to_use = 0;
1008
1009 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1010 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1011}
1012
1013/**
1014 * ixgb_set_mac - Change the Ethernet Address of the NIC
1015 * @netdev: network interface device structure
1016 * @p: pointer to an address structure
1017 *
1018 * Returns 0 on success, negative on failure
1019 **/
1020
1021static int
1022ixgb_set_mac(struct net_device *netdev, void *p)
1023{
8908c6cd 1024 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1025 struct sockaddr *addr = p;
1026
03f83041 1027 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1028 return -EADDRNOTAVAIL;
1029
1030 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1031
1032 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1033
1034 return 0;
1035}
1036
1037/**
1038 * ixgb_set_multi - Multicast and Promiscuous mode set
1039 * @netdev: network interface device structure
1040 *
1041 * The set_multi entry point is called whenever the multicast address
1042 * list or the network interface flags are updated. This routine is
1043 * responsible for configuring the hardware for proper multicast,
1044 * promiscuous mode, and all-multi behavior.
1045 **/
1046
1047static void
1048ixgb_set_multi(struct net_device *netdev)
1049{
8908c6cd 1050 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1051 struct ixgb_hw *hw = &adapter->hw;
1052 struct dev_mc_list *mc_ptr;
222441a6 1053 u32 rctl;
1da177e4
LT		 1054 int i;
1055
1056 /* Check for Promiscuous and All Multicast modes */
1057
1058 rctl = IXGB_READ_REG(hw, RCTL);
1059
03f83041 1060 if (netdev->flags & IFF_PROMISC) {
1da177e4 1061 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
03f83041 1062 } else if (netdev->flags & IFF_ALLMULTI) {
1da177e4
LT		 1063 rctl |= IXGB_RCTL_MPE;
1064 rctl &= ~IXGB_RCTL_UPE;
1065 } else {
1066 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1067 }
1068
03f83041 1069 if (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1070 rctl |= IXGB_RCTL_MPE;
1071 IXGB_WRITE_REG(hw, RCTL, rctl);
1072 } else {
222441a6 1073 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1074 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1075
1076 IXGB_WRITE_REG(hw, RCTL, rctl);
1077
0060c072
JB		 1078 for (i = 0, mc_ptr = netdev->mc_list;
1079 mc_ptr;
1080 i++, mc_ptr = mc_ptr->next)
1da177e4 1081 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
0060c072 1082 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1da177e4
LT		 1083
1084 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1085 }
1086}
1087
1088/**
1089 * ixgb_watchdog - Timer Call-back
1090 * @data: pointer to netdev cast into an unsigned long
1091 **/
1092
1093static void
1094ixgb_watchdog(unsigned long data)
1095{
1096 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1097 struct net_device *netdev = adapter->netdev;
1098 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1099
1100 ixgb_check_for_link(&adapter->hw);
1101
1102 if (ixgb_check_for_bad_link(&adapter->hw)) {
1103 /* force the reset path */
1104 netif_stop_queue(netdev);
1105 }
1106
03f83041
JB		 1107 if (adapter->hw.link_up) {
1108 if (!netif_carrier_ok(netdev)) {
ec9c3f5d
AK		 1109 DPRINTK(LINK, INFO,
1110 "NIC Link is Up 10000 Mbps Full Duplex\n");
1da177e4
LT		 1111 adapter->link_speed = 10000;
1112 adapter->link_duplex = FULL_DUPLEX;
1113 netif_carrier_on(netdev);
1114 netif_wake_queue(netdev);
1115 }
1116 } else {
03f83041 1117 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1118 adapter->link_speed = 0;
1119 adapter->link_duplex = 0;
ec9c3f5d 1120 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1da177e4
LT		 1121 netif_carrier_off(netdev);
1122 netif_stop_queue(netdev);
1123
1124 }
1125 }
1126
1127 ixgb_update_stats(adapter);
1128
03f83041
JB		 1129 if (!netif_carrier_ok(netdev)) {
1130 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1131 /* We've lost link, so the controller stops DMA,
1132 * but we've got queued Tx work that's never going
1133 * to get done, so reset controller to flush Tx.
1134 * (Do the reset outside of interrupt context). */
1135 schedule_work(&adapter->tx_timeout_task);
1136 }
1137 }
1138
1139 /* Force detection of hung controller every watchdog period */
446490ca 1140 adapter->detect_tx_hung = true;
1da177e4
LT		 1141
1142 /* generate an interrupt to force clean up of any stragglers */
1143 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1144
1145 /* Reset the timer */
1146 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1147}
1148
1149#define IXGB_TX_FLAGS_CSUM 0x00000001
1150#define IXGB_TX_FLAGS_VLAN 0x00000002
1151#define IXGB_TX_FLAGS_TSO 0x00000004
1152
235949d1 1153static int
1da177e4
LT		 1154ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1155{
1da177e4
LT		 1156 struct ixgb_context_desc *context_desc;
1157 unsigned int i;
222441a6
JP		 1158 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1159 u16 ipcse, tucse, mss;
1da177e4
LT		 1160 int err;
1161
89114afd 1162 if (likely(skb_is_gso(skb))) {
adc54139 1163 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1164 struct iphdr *iph;
1165
1da177e4
LT		 1166 if (skb_header_cloned(skb)) {
1167 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1168 if (err)
1169 return err;
1170 }
1171
ab6a5bb6 1172 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1173 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1174 iph = ip_hdr(skb);
1175 iph->tot_len = 0;
1176 iph->check = 0;
aa8223c7
ACM		 1177 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1178 iph->daddr, 0,
1179 IPPROTO_TCP, 0);
bbe735e4 1180 ipcss = skb_network_offset(skb);
eddc9ec5 1181 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1182 ipcse = skb_transport_offset(skb) - 1;
1183 tucss = skb_transport_offset(skb);
aa8223c7 1184 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1185 tucse = 0;
1186
1187 i = adapter->tx_ring.next_to_use;
1188 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1189 buffer_info = &adapter->tx_ring.buffer_info[i];
1190 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1191
1192 context_desc->ipcss = ipcss;
1193 context_desc->ipcso = ipcso;
1194 context_desc->ipcse = cpu_to_le16(ipcse);
1195 context_desc->tucss = tucss;
1196 context_desc->tucso = tucso;
1197 context_desc->tucse = cpu_to_le16(tucse);
1198 context_desc->mss = cpu_to_le16(mss);
1199 context_desc->hdr_len = hdr_len;
1200 context_desc->status = 0;
1201 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1202 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1203 | IXGB_CONTEXT_DESC_CMD_TSE
1204 | IXGB_CONTEXT_DESC_CMD_IP
1205 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1206 | IXGB_CONTEXT_DESC_CMD_IDE
1207 | (skb->len - (hdr_len)));
1208
06c2f9ec 1209
03f83041 1210 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1211 adapter->tx_ring.next_to_use = i;
1212
1213 return 1;
1214 }
1da177e4
LT		 1215
1216 return 0;
1217}
1218
446490ca 1219static bool
1da177e4
LT		 1220ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1221{
1222 struct ixgb_context_desc *context_desc;
1223 unsigned int i;
222441a6 1224 u8 css, cso;
1da177e4 1225
03f83041 1226 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1227 struct ixgb_buffer *buffer_info;
ea2ae17d 1228 css = skb_transport_offset(skb);
ff1dcadb 1229 cso = css + skb->csum_offset;
1da177e4
LT		 1230
1231 i = adapter->tx_ring.next_to_use;
1232 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1233 buffer_info = &adapter->tx_ring.buffer_info[i];
1234 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1235
1236 context_desc->tucss = css;
1237 context_desc->tucso = cso;
1238 context_desc->tucse = 0;
1239 /* zero out any previously existing data in one instruction */
222441a6 1240 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1241 context_desc->status = 0;
1242 context_desc->hdr_len = 0;
1243 context_desc->mss = 0;
1244 context_desc->cmd_type_len =
1245 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1246 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1247
03f83041 1248 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1249 adapter->tx_ring.next_to_use = i;
1250
446490ca 1251 return true;
1da177e4
LT		 1252 }
1253
446490ca 1254 return false;
1da177e4
LT		 1255}
1256
1257#define IXGB_MAX_TXD_PWR 14
1258#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1259
235949d1 1260static int
1da177e4
LT		 1261ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1262 unsigned int first)
1263{
1264 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1265 struct ixgb_buffer *buffer_info;
1266 int len = skb->len;
1267 unsigned int offset = 0, size, count = 0, i;
5d927853 1268 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1269
1270 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1271 unsigned int f;
ac79c82e 1272
1da177e4
LT		 1273 len -= skb->data_len;
1274
1275 i = tx_ring->next_to_use;
1276
9a432992 1277 while (len) {
1da177e4 1278 buffer_info = &tx_ring->buffer_info[i];
709cf018 1279 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1280 /* Workaround for premature desc write-backs
1281 * in TSO mode. Append 4-byte sentinel desc */
1282 if (unlikely(mss && !nr_frags && size == len && size > 8))
1283 size -= 4;
1284
1da177e4 1285 buffer_info->length = size;
adc54139 1286 WARN_ON(buffer_info->dma != 0);
34336635 1287 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1288 buffer_info->dma =
1289 pci_map_single(adapter->pdev,
1290 skb->data + offset,
1291 size,
1292 PCI_DMA_TODEVICE);
1dfdd7df 1293 buffer_info->next_to_watch = 0;
1da177e4
LT		 1294
1295 len -= size;
1296 offset += size;
1297 count++;
03f83041 1298 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1299 }
1300
1301 for(f = 0; f < nr_frags; f++) {
1302 struct skb_frag_struct *frag;
1303
1304 frag = &skb_shinfo(skb)->frags[f];
1305 len = frag->size;
1306 offset = 0;
1307
9a432992 1308 while (len) {
1da177e4 1309 buffer_info = &tx_ring->buffer_info[i];
709cf018 1310 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1311
1312 /* Workaround for premature desc write-backs
1313 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1314 if (unlikely(mss && (f == (nr_frags - 1))
1315 && size == len && size > 8))
5d927853
JB		 1316 size -= 4;
1317
1da177e4 1318 buffer_info->length = size;
34336635 1319 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1320 buffer_info->dma =
1321 pci_map_page(adapter->pdev,
1322 frag->page,
1323 frag->page_offset + offset,
1324 size,
1325 PCI_DMA_TODEVICE);
1dfdd7df 1326 buffer_info->next_to_watch = 0;
1da177e4
LT		 1327
1328 len -= size;
1329 offset += size;
1330 count++;
03f83041 1331 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1332 }
1333 }
1334 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1335 tx_ring->buffer_info[i].skb = skb;
1336 tx_ring->buffer_info[first].next_to_watch = i;
1337
1338 return count;
1339}
1340
235949d1 1341static void
1da177e4
LT		 1342ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1343{
1344 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1345 struct ixgb_tx_desc *tx_desc = NULL;
1346 struct ixgb_buffer *buffer_info;
222441a6
JP		 1347 u32 cmd_type_len = adapter->tx_cmd_type;
1348 u8 status = 0;
1349 u8 popts = 0;
1da177e4
LT		 1350 unsigned int i;
1351
03f83041 1352 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1353 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1354 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1355 }
1356
03f83041 1357 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1358 popts |= IXGB_TX_DESC_POPTS_TXSM;
1359
03f83041 1360 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1361 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1362
1363 i = tx_ring->next_to_use;
1364
9a432992 1365 while (count--) {
1da177e4
LT		 1366 buffer_info = &tx_ring->buffer_info[i];
1367 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1368 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1369 tx_desc->cmd_type_len =
1370 cpu_to_le32(cmd_type_len | buffer_info->length);
1371 tx_desc->status = status;
1372 tx_desc->popts = popts;
1373 tx_desc->vlan = cpu_to_le16(vlan_id);
1374
03f83041 1375 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1376 }
1377
0060c072
JB		 1378 tx_desc->cmd_type_len |=
1379 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1380
1381 /* Force memory writes to complete before letting h/w
1382 * know there are new descriptors to fetch. (Only
1383 * applicable for weak-ordered memory model archs,
1384 * such as IA-64). */
1385 wmb();
1386
1387 tx_ring->next_to_use = i;
1388 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1389}
1390
dfd341e4
JB		 1391static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1392{
1393 struct ixgb_adapter *adapter = netdev_priv(netdev);
1394 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1395
1396 netif_stop_queue(netdev);
1397 /* Herbert's original patch had:
1398 * smp_mb__after_netif_stop_queue();
1399 * but since that doesn't exist yet, just open code it. */
1400 smp_mb();
1401
1402 /* We need to check again in a case another CPU has just
1403 * made room available. */
1404 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1405 return -EBUSY;
1406
1407 /* A reprieve! */
1408 netif_start_queue(netdev);
1409 ++adapter->restart_queue;
1410 return 0;
1411}
1412
1413static int ixgb_maybe_stop_tx(struct net_device *netdev,
1414 struct ixgb_desc_ring *tx_ring, int size)
1415{
1416 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1417 return 0;
1418 return __ixgb_maybe_stop_tx(netdev, size);
1419}
1420
1421
1da177e4
LT		 1422/* Tx Descriptors needed, worst case */
1423#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1424 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1425#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1426 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1427 + 1 /* one more needed for sentinel TSO workaround */
1da177e4
LT		 1428
1429static int
1430ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1431{
8908c6cd 1432 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1433 unsigned int first;
1434 unsigned int tx_flags = 0;
1da177e4
LT		 1435 int vlan_id = 0;
1436 int tso;
1437
bab2bce7
JB		 1438 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1439 dev_kfree_skb(skb);
1440 return NETDEV_TX_OK;
1441 }
1442
03f83041 1443 if (skb->len <= 0) {
1da177e4
LT		 1444 dev_kfree_skb_any(skb);
1445 return 0;
1446 }
1447
dfd341e4 1448 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1449 DESC_NEEDED)))
f017f14b 1450 return NETDEV_TX_BUSY;
1da177e4 1451
03f83041 1452 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1da177e4
LT		 1453 tx_flags |= IXGB_TX_FLAGS_VLAN;
1454 vlan_id = vlan_tx_tag_get(skb);
1455 }
1456
1457 first = adapter->tx_ring.next_to_use;
0060c072 1458
1da177e4
LT		 1459 tso = ixgb_tso(adapter, skb);
1460 if (tso < 0) {
1461 dev_kfree_skb_any(skb);
1462 return NETDEV_TX_OK;
1463 }
1464
96f9c2e2 1465 if (likely(tso))
1da177e4 1466 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1467 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1468 tx_flags |= IXGB_TX_FLAGS_CSUM;
1469
1470 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1471 tx_flags);
1472
1473 netdev->trans_start = jiffies;
1474
f017f14b 1475 /* Make sure there is space in the ring for the next send. */
dfd341e4 1476 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
f017f14b 1477
f017f14b 1478 return NETDEV_TX_OK;
1da177e4
LT		 1479}
1480
1481/**
1482 * ixgb_tx_timeout - Respond to a Tx Hang
1483 * @netdev: network interface device structure
1484 **/
1485
1486static void
1487ixgb_tx_timeout(struct net_device *netdev)
1488{
8908c6cd 1489 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1490
1491 /* Do the reset outside of interrupt context */
1492 schedule_work(&adapter->tx_timeout_task);
1493}
1494
1495static void
c4028958 1496ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1497{
c4028958
DH		 1498 struct ixgb_adapter *adapter =
1499 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1500
9b8118df 1501 adapter->tx_timeout_count++;
446490ca 1502 ixgb_down(adapter, true);
1da177e4
LT		 1503 ixgb_up(adapter);
1504}
1505
1506/**
1507 * ixgb_get_stats - Get System Network Statistics
1508 * @netdev: network interface device structure
1509 *
1510 * Returns the address of the device statistics structure.
1511 * The statistics are actually updated from the timer callback.
1512 **/
1513
1514static struct net_device_stats *
1515ixgb_get_stats(struct net_device *netdev)
1516{
8908c6cd 1517 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1518
1519 return &adapter->net_stats;
1520}
1521
1522/**
1523 * ixgb_change_mtu - Change the Maximum Transfer Unit
1524 * @netdev: network interface device structure
1525 * @new_mtu: new value for maximum frame size
1526 *
1527 * Returns 0 on success, negative on failure
1528 **/
1529
1530static int
1531ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1532{
8908c6cd 1533 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1534 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1535 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1536
a65a604a
JB		 1537 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1538 if ((new_mtu < 68) ||
1539 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
ec9c3f5d 1540 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1541 return -EINVAL;
1542 }
1543
b5ca88eb
JB		 1544 if (old_max_frame == max_frame)
1545 return 0;
1546
1547 if (netif_running(netdev))
1548 ixgb_down(adapter, true);
1549
a3dc3da0 1550 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1551
1552 netdev->mtu = new_mtu;
1553
b5ca88eb 1554 if (netif_running(netdev))
1da177e4 1555 ixgb_up(adapter);
1da177e4
LT		 1556
1557 return 0;
1558}
1559
1560/**
1561 * ixgb_update_stats - Update the board statistics counters.
1562 * @adapter: board private structure
1563 **/
1564
1565void
1566ixgb_update_stats(struct ixgb_adapter *adapter)
1567{
5633684d 1568 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1569 struct pci_dev *pdev = adapter->pdev;
1570
1571 /* Prevent stats update while adapter is being reset */
81b1955e 1572 if (pci_channel_offline(pdev))
01748fbb 1573 return;
5633684d 1574
03f83041 1575 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
5633684d
MC		 1576 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1577 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1578 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1579 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1580 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1581
1582 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1583 /* fix up multicast stats by removing broadcasts */
03f83041 1584 if (multi >= bcast)
7b89178d 1585 multi -= bcast;
0060c072 1586
5633684d
MC		 1587 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1588 adapter->stats.mprch += (multi >> 32);
0060c072 1589 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1590 adapter->stats.bprch += bcast_h;
1591 } else {
1592 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1593 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1594 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1595 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1596 }
1da177e4
LT		 1597 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1598 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1599 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1600 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1601 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1602 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1603 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1604 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1605 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1606 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1607 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1608 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1609 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1610 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1611 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1612 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1613 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1614 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1615 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1616 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1617 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1618 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1619 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1620 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1621 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1622 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1623 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1624 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1625 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1626 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1627 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1628 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1629 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1630 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1631 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1632 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1633 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1634 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1635 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1636 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1637 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1638 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1639 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1640 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1641 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1642 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1643 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1644 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1645 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1646 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1647 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1648 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1649 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1650 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1651 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1652 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1653
1654 /* Fill out the OS statistics structure */
1655
1656 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1657 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1658 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1659 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1660 adapter->net_stats.multicast = adapter->stats.mprcl;
1661 adapter->net_stats.collisions = 0;
1662
1663 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1664 * with a length in the type/len field */
1665 adapter->net_stats.rx_errors =
1666 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1667 adapter->stats.ruc +
1668 adapter->stats.roc /*+ adapter->stats.rlec */ +
1669 adapter->stats.icbc +
1670 adapter->stats.ecbc + adapter->stats.mpc;
1671
1da177e4
LT		 1672 /* see above
1673 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1674 */
1675
1676 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1677 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1678 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1679 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1680
1681 adapter->net_stats.tx_errors = 0;
1682 adapter->net_stats.rx_frame_errors = 0;
1683 adapter->net_stats.tx_aborted_errors = 0;
1684 adapter->net_stats.tx_carrier_errors = 0;
1685 adapter->net_stats.tx_fifo_errors = 0;
1686 adapter->net_stats.tx_heartbeat_errors = 0;
1687 adapter->net_stats.tx_window_errors = 0;
1688}
1689
1690#define IXGB_MAX_INTR 10
1691/**
1692 * ixgb_intr - Interrupt Handler
1693 * @irq: interrupt number
1694 * @data: pointer to a network interface device structure
1da177e4
LT		 1695 **/
1696
1697static irqreturn_t
7d12e780 1698ixgb_intr(int irq, void *data)
1da177e4
LT		 1699{
1700 struct net_device *netdev = data;
8908c6cd 1701 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1702 struct ixgb_hw *hw = &adapter->hw;
222441a6 1703 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4
LT		 1704#ifndef CONFIG_IXGB_NAPI
1705 unsigned int i;
1706#endif
1707
03f83041 1708 if (unlikely(!icr))
1da177e4
LT		 1709 return IRQ_NONE; /* Not our interrupt */
1710
bab2bce7
JB		 1711 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1712 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1713 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4
LT		 1714
1715#ifdef CONFIG_IXGB_NAPI
bea3348e 1716 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1da177e4 1717
0060c072 1718 /* Disable interrupts and register for poll. The flush
1da177e4
LT		 1719 of the posted write is intentionally left out.
1720 */
1721
1da177e4 1722 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
bea3348e 1723 __netif_rx_schedule(netdev, &adapter->napi);
1da177e4
LT		 1724 }
1725#else
1726 /* yes, that is actually a & and it is meant to make sure that
1727 * every pass through this for loop checks both receive and
1728 * transmit queues for completed descriptors, intended to
1729 * avoid starvation issues and assist tx/rx fairness. */
1730 for(i = 0; i < IXGB_MAX_INTR; i++)
03f83041 1731 if (!ixgb_clean_rx_irq(adapter) &
1da177e4
LT		 1732 !ixgb_clean_tx_irq(adapter))
1733 break;
0060c072 1734#endif
1da177e4
LT		 1735 return IRQ_HANDLED;
1736}
1737
1738#ifdef CONFIG_IXGB_NAPI
1739/**
1740 * ixgb_clean - NAPI Rx polling callback
1741 * @adapter: board private structure
1742 **/
1743
1744static int
bea3348e 1745ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1746{
bea3348e
SH		 1747 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1748 struct net_device *netdev = adapter->netdev;
1da177e4
LT		 1749 int work_done = 0;
1750
53e52c72 1751 ixgb_clean_tx_irq(adapter);
bea3348e 1752 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1753
53e52c72
DM		 1754 /* If budget not fully consumed, exit the polling mode */
1755 if (work_done < budget) {
bea3348e 1756 netif_rx_complete(netdev, napi);
72ab5195
JB		 1757 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1758 ixgb_irq_enable(adapter);
1da177e4
LT		 1759 }
1760
bea3348e 1761 return work_done;
1da177e4
LT		 1762}
1763#endif
1764
1765/**
1766 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1767 * @adapter: board private structure
1768 **/
1769
446490ca 1770static bool
1da177e4
LT		 1771ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1772{
1773 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1774 struct net_device *netdev = adapter->netdev;
1775 struct ixgb_tx_desc *tx_desc, *eop_desc;
1776 struct ixgb_buffer *buffer_info;
1777 unsigned int i, eop;
446490ca 1778 bool cleaned = false;
1da177e4
LT		 1779
1780 i = tx_ring->next_to_clean;
1781 eop = tx_ring->buffer_info[i].next_to_watch;
1782 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1783
9a432992 1784 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1785
446490ca 1786 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1787 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1788 buffer_info = &tx_ring->buffer_info[i];
1789
0060c072
JB		 1790 if (tx_desc->popts &
1791 (IXGB_TX_DESC_POPTS_TXSM |
1792 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1793 adapter->hw_csum_tx_good++;
1794
1795 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1796
222441a6 1797 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1798
1799 cleaned = (i == eop);
03f83041 1800 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1801 }
1802
1803 eop = tx_ring->buffer_info[i].next_to_watch;
1804 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1805 }
1806
1807 tx_ring->next_to_clean = i;
1808
0f8ecbad
JB		 1809 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1810 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1811 /* Make sure that anybody stopping the queue after this
1812 * sees the new next_to_clean. */
1813 smp_mb();
1814
1815 if (netif_queue_stopped(netdev) &&
1816 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1817 netif_wake_queue(netdev);
0f8ecbad
JB		 1818 ++adapter->restart_queue;
1819 }
1da177e4 1820 }
1da177e4 1821
03f83041 1822 if (adapter->detect_tx_hung) {
1da177e4
LT		 1823 /* detect a transmit hang in hardware, this serializes the
1824 * check with the clearing of time_stamp and movement of i */
446490ca 1825 adapter->detect_tx_hung = false;
9b8118df
AK		 1826 if (tx_ring->buffer_info[eop].dma &&
1827 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1828 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1829 IXGB_STATUS_TXOFF)) {
1830 /* detected Tx unit hang */
1831 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1832 " TDH <%x>\n"
1833 " TDT <%x>\n"
1834 " next_to_use <%x>\n"
1835 " next_to_clean <%x>\n"
1836 "buffer_info[next_to_clean]\n"
1837 " time_stamp <%lx>\n"
1838 " next_to_watch <%x>\n"
1839 " jiffies <%lx>\n"
1840 " next_to_watch.status <%x>\n",
1841 IXGB_READ_REG(&adapter->hw, TDH),
1842 IXGB_READ_REG(&adapter->hw, TDT),
1843 tx_ring->next_to_use,
1844 tx_ring->next_to_clean,
1845 tx_ring->buffer_info[eop].time_stamp,
1846 eop,
1847 jiffies,
1848 eop_desc->status);
1da177e4 1849 netif_stop_queue(netdev);
9b8118df 1850 }
1da177e4
LT		 1851 }
1852
1853 return cleaned;
1854}
1855
1856/**
1857 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1858 * @adapter: board private structure
1859 * @rx_desc: receive descriptor
1860 * @sk_buff: socket buffer with received data
1861 **/
1862
235949d1 1863static void
1da177e4 1864ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1865 struct ixgb_rx_desc *rx_desc,
1866 struct sk_buff *skb)
1da177e4
LT		 1867{
1868 /* Ignore Checksum bit is set OR
1869 * TCP Checksum has not been calculated
1870 */
03f83041 1871 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4
LT		 1872 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1873 skb->ip_summed = CHECKSUM_NONE;
1874 return;
1875 }
1876
1877 /* At this point we know the hardware did the TCP checksum */
1878 /* now look at the TCP checksum error bit */
03f83041 1879 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4
LT		 1880 /* let the stack verify checksum errors */
1881 skb->ip_summed = CHECKSUM_NONE;
1882 adapter->hw_csum_rx_error++;
1883 } else {
1884 /* TCP checksum is good */
1885 skb->ip_summed = CHECKSUM_UNNECESSARY;
1886 adapter->hw_csum_rx_good++;
1887 }
1888}
1889
1890/**
1891 * ixgb_clean_rx_irq - Send received data up the network stack,
1892 * @adapter: board private structure
1893 **/
1894
446490ca 1895static bool
1da177e4
LT		 1896#ifdef CONFIG_IXGB_NAPI
1897ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1898#else
1899ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1900#endif
1901{
1902 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1903 struct net_device *netdev = adapter->netdev;
1904 struct pci_dev *pdev = adapter->pdev;
1905 struct ixgb_rx_desc *rx_desc, *next_rxd;
1906 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1907 u32 length;
1da177e4 1908 unsigned int i, j;
446490ca 1909 bool cleaned = false;
1da177e4
LT		 1910
1911 i = rx_ring->next_to_clean;
1912 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1913 buffer_info = &rx_ring->buffer_info[i];
1914
9a432992 1915 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
f404de1c
MC		 1916 struct sk_buff *skb, *next_skb;
1917 u8 status;
1da177e4
LT		 1918
1919#ifdef CONFIG_IXGB_NAPI
03f83041 1920 if (*work_done >= work_to_do)
1da177e4
LT		 1921 break;
1922
1923 (*work_done)++;
1924#endif
f404de1c 1925 status = rx_desc->status;
1da177e4 1926 skb = buffer_info->skb;
1dfdd7df 1927 buffer_info->skb = NULL;
f404de1c 1928
1da177e4
LT		 1929 prefetch(skb->data);
1930
03f83041 1931 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 1932 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1933 prefetch(next_rxd);
1934
03f83041 1935 if ((j = i + 1) == rx_ring->count) j = 0;
1da177e4
LT		 1936 next2_buffer = &rx_ring->buffer_info[j];
1937 prefetch(next2_buffer);
1938
1939 next_buffer = &rx_ring->buffer_info[i];
1940 next_skb = next_buffer->skb;
1941 prefetch(next_skb);
1942
446490ca 1943 cleaned = true;
1da177e4
LT		 1944
1945 pci_unmap_single(pdev,
1946 buffer_info->dma,
1947 buffer_info->length,
1948 PCI_DMA_FROMDEVICE);
1949
1950 length = le16_to_cpu(rx_desc->length);
1951
03f83041 1952 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 1953
1954 /* All receives must fit into a single buffer */
1955
1956 IXGB_DBG("Receive packet consumed multiple buffers "
1957 "length<%x>\n", length);
1958
1959 dev_kfree_skb_irq(skb);
f404de1c 1960 goto rxdesc_done;
1da177e4
LT		 1961 }
1962
0060c072
JB		 1963 if (unlikely(rx_desc->errors &
1964 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
1965 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 1966 dev_kfree_skb_irq(skb);
f404de1c 1967 goto rxdesc_done;
1da177e4
LT		 1968 }
1969
6b900bb4
AK		 1970 /* code added for copybreak, this should improve
1971 * performance for small packets with large amounts
1972 * of reassembly being done in the stack */
d9fed18b 1973 if (length < copybreak) {
6b900bb4 1974 struct sk_buff *new_skb =
5791704f 1975 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
6b900bb4
AK		 1976 if (new_skb) {
1977 skb_reserve(new_skb, NET_IP_ALIGN);
27d7ff46
ACM		 1978 skb_copy_to_linear_data_offset(new_skb,
1979 -NET_IP_ALIGN,
1980 (skb->data -
1981 NET_IP_ALIGN),
1982 (length +
1983 NET_IP_ALIGN));
6b900bb4
AK		 1984 /* save the skb in buffer_info as good */
1985 buffer_info->skb = skb;
1986 skb = new_skb;
1987 }
1988 }
1989 /* end copybreak code */
1990
1da177e4
LT		 1991 /* Good Receive */
1992 skb_put(skb, length);
1993
1994 /* Receive Checksum Offload */
1995 ixgb_rx_checksum(adapter, rx_desc, skb);
1996
1997 skb->protocol = eth_type_trans(skb, netdev);
1998#ifdef CONFIG_IXGB_NAPI
03f83041 1999 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2000 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
0060c072 2001 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2002 } else {
2003 netif_receive_skb(skb);
2004 }
2005#else /* CONFIG_IXGB_NAPI */
03f83041 2006 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2007 vlan_hwaccel_rx(skb, adapter->vlgrp,
0060c072 2008 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2009 } else {
2010 netif_rx(skb);
2011 }
2012#endif /* CONFIG_IXGB_NAPI */
2013 netdev->last_rx = jiffies;
2014
f404de1c
MC		 2015rxdesc_done:
2016 /* clean up descriptor, might be written over by hw */
1da177e4 2017 rx_desc->status = 0;
1da177e4 2018
f404de1c 2019 /* use prefetched values */
1da177e4
LT		 2020 rx_desc = next_rxd;
2021 buffer_info = next_buffer;
2022 }
2023
2024 rx_ring->next_to_clean = i;
2025
2026 ixgb_alloc_rx_buffers(adapter);
2027
2028 return cleaned;
2029}
2030
2031/**
2032 * ixgb_alloc_rx_buffers - Replace used receive buffers
2033 * @adapter: address of board private structure
2034 **/
2035
2036static void
2037ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
2038{
2039 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2040 struct net_device *netdev = adapter->netdev;
2041 struct pci_dev *pdev = adapter->pdev;
2042 struct ixgb_rx_desc *rx_desc;
2043 struct ixgb_buffer *buffer_info;
2044 struct sk_buff *skb;
2045 unsigned int i;
1da177e4
LT		 2046 long cleancount;
2047
2048 i = rx_ring->next_to_use;
2049 buffer_info = &rx_ring->buffer_info[i];
2050 cleancount = IXGB_DESC_UNUSED(rx_ring);
2051
1da177e4 2052
41639fed 2053 /* leave three descriptors unused */
9a432992 2054 while (--cleancount > 2) {
1dfdd7df 2055 /* recycle! its good for you */
69c7a940
AK		 2056 skb = buffer_info->skb;
2057 if (skb) {
1dfdd7df
AK		 2058 skb_trim(skb, 0);
2059 goto map_skb;
2060 }
1da177e4 2061
69c7a940
AK		 2062 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2063 + NET_IP_ALIGN);
1dfdd7df 2064 if (unlikely(!skb)) {
1da177e4 2065 /* Better luck next round */
1dfdd7df 2066 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2067 break;
2068 }
2069
2070 /* Make buffer alignment 2 beyond a 16 byte boundary
2071 * this will result in a 16 byte aligned IP header after
2072 * the 14 byte MAC header is removed
2073 */
2074 skb_reserve(skb, NET_IP_ALIGN);
2075
1da177e4
LT		 2076 buffer_info->skb = skb;
2077 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df
AK		 2078map_skb:
2079 buffer_info->dma = pci_map_single(pdev,
2080 skb->data,
2081 adapter->rx_buffer_len,
2082 PCI_DMA_FROMDEVICE);
1da177e4 2083
1dfdd7df 2084 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2085 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2086 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2087 * this is the rest of the workaround for h/w double
41639fed
MC		 2088 * writeback. */
2089 rx_desc->status = 0;
1da177e4 2090
1da177e4 2091
03f83041 2092 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2093 buffer_info = &rx_ring->buffer_info[i];
2094 }
2095
1dfdd7df
AK		 2096 if (likely(rx_ring->next_to_use != i)) {
2097 rx_ring->next_to_use = i;
2098 if (unlikely(i-- == 0))
2099 i = (rx_ring->count - 1);
2100
2101 /* Force memory writes to complete before letting h/w
2102 * know there are new descriptors to fetch. (Only
2103 * applicable for weak-ordered memory model archs, such
2104 * as IA-64). */
2105 wmb();
2106 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2107 }
1da177e4
LT		 2108}
2109
2110/**
2111 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
0060c072 2112 *
1da177e4
LT		 2113 * @param netdev network interface device structure
2114 * @param grp indicates to enable or disable tagging/stripping
2115 **/
2116static void
2117ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2118{
8908c6cd 2119 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2120 u32 ctrl, rctl;
1da177e4
LT		 2121
2122 ixgb_irq_disable(adapter);
2123 adapter->vlgrp = grp;
2124
03f83041 2125 if (grp) {
1da177e4
LT		 2126 /* enable VLAN tag insert/strip */
2127 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2128 ctrl |= IXGB_CTRL0_VME;
2129 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2130
2131 /* enable VLAN receive filtering */
2132
2133 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2134 rctl |= IXGB_RCTL_VFE;
2135 rctl &= ~IXGB_RCTL_CFIEN;
2136 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2137 } else {
2138 /* disable VLAN tag insert/strip */
2139
2140 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2141 ctrl &= ~IXGB_CTRL0_VME;
2142 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2143
2144 /* disable VLAN filtering */
2145
2146 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2147 rctl &= ~IXGB_RCTL_VFE;
2148 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2149 }
2150
bab2bce7
JB		 2151 /* don't enable interrupts unless we are UP */
2152 if (adapter->netdev->flags & IFF_UP)
2153 ixgb_irq_enable(adapter);
1da177e4
LT		 2154}
2155
2156static void
222441a6 2157ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2158{
8908c6cd 2159 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2160 u32 vfta, index;
1da177e4
LT		 2161
2162 /* add VID to filter table */
2163
2164 index = (vid >> 5) & 0x7F;
2165 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2166 vfta |= (1 << (vid & 0x1F));
2167 ixgb_write_vfta(&adapter->hw, index, vfta);
2168}
2169
2170static void
222441a6 2171ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2172{
8908c6cd 2173 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2174 u32 vfta, index;
1da177e4
LT		 2175
2176 ixgb_irq_disable(adapter);
2177
5c15bdec 2178 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 2179
bab2bce7
JB		 2180 /* don't enable interrupts unless we are UP */
2181 if (adapter->netdev->flags & IFF_UP)
2182 ixgb_irq_enable(adapter);
1da177e4 2183
bab2bce7 2184 /* remove VID from filter table */
1da177e4
LT		 2185
2186 index = (vid >> 5) & 0x7F;
2187 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2188 vfta &= ~(1 << (vid & 0x1F));
2189 ixgb_write_vfta(&adapter->hw, index, vfta);
2190}
2191
2192static void
2193ixgb_restore_vlan(struct ixgb_adapter *adapter)
2194{
2195 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2196
03f83041 2197 if (adapter->vlgrp) {
222441a6 2198 u16 vid;
1da177e4 2199 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
03f83041 2200 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2201 continue;
2202 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2203 }
2204 }
2205}
2206
1da177e4
LT		 2207#ifdef CONFIG_NET_POLL_CONTROLLER
2208/*
2209 * Polling 'interrupt' - used by things like netconsole to send skbs
2210 * without having to re-enable interrupts. It's not called while
2211 * the interrupt routine is executing.
2212 */
2213
2214static void ixgb_netpoll(struct net_device *dev)
2215{
f990b426 2216 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2217
1da177e4 2218 disable_irq(adapter->pdev->irq);
7d12e780 2219 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2220 enable_irq(adapter->pdev->irq);
2221}
2222#endif
2223
01748fbb
LV		 2224/**
2225 * ixgb_io_error_detected() - called when PCI error is detected
2226 * @pdev pointer to pci device with error
2227 * @state pci channel state after error
2228 *
2229 * This callback is called by the PCI subsystem whenever
2230 * a PCI bus error is detected.
2231 */
0060c072
JB		 2232static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2233 enum pci_channel_state state)
01748fbb
LV		 2234{
2235 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2236 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2237
03f83041 2238 if (netif_running(netdev))
446490ca 2239 ixgb_down(adapter, true);
01748fbb
LV		 2240
2241 pci_disable_device(pdev);
2242
2243 /* Request a slot reset. */
2244 return PCI_ERS_RESULT_NEED_RESET;
2245}
2246
2247/**
2248 * ixgb_io_slot_reset - called after the pci bus has been reset.
2249 * @pdev pointer to pci device with error
2250 *
52035bdb 2251 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2252 * Basically, this tries to restart the card from scratch.
2253 * This is a shortened version of the device probe/discovery code,
2254 * it resembles the first-half of the ixgb_probe() routine.
2255 */
0060c072 2256static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2257{
2258 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2259 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2260
03f83041 2261 if (pci_enable_device(pdev)) {
01748fbb
LV		 2262 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2263 return PCI_ERS_RESULT_DISCONNECT;
2264 }
2265
2266 /* Perform card reset only on one instance of the card */
2267 if (0 != PCI_FUNC (pdev->devfn))
2268 return PCI_ERS_RESULT_RECOVERED;
2269
2270 pci_set_master(pdev);
2271
2272 netif_carrier_off(netdev);
2273 netif_stop_queue(netdev);
2274 ixgb_reset(adapter);
2275
2276 /* Make sure the EEPROM is good */
03f83041 2277 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
01748fbb
LV		 2278 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2279 return PCI_ERS_RESULT_DISCONNECT;
2280 }
2281 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2282 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2283
03f83041 2284 if (!is_valid_ether_addr(netdev->perm_addr)) {
01748fbb
LV		 2285 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2286 return PCI_ERS_RESULT_DISCONNECT;
2287 }
2288
2289 return PCI_ERS_RESULT_RECOVERED;
2290}
2291
2292/**
2293 * ixgb_io_resume - called when its OK to resume normal operations
2294 * @pdev pointer to pci device with error
2295 *
2296 * The error recovery driver tells us that its OK to resume
2297 * normal operation. Implementation resembles the second-half
2298 * of the ixgb_probe() routine.
2299 */
0060c072 2300static void ixgb_io_resume(struct pci_dev *pdev)
01748fbb
LV		 2301{
2302 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2303 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2304
2305 pci_set_master(pdev);
2306
03f83041
JB		 2307 if (netif_running(netdev)) {
2308 if (ixgb_up(adapter)) {
01748fbb
LV		 2309 printk ("ixgb: can't bring device back up after reset\n");
2310 return;
2311 }
2312 }
2313
2314 netif_device_attach(netdev);
2315 mod_timer(&adapter->watchdog_timer, jiffies);
2316}
2317
1da177e4 2318/* ixgb_main.c */
Linux kernel - Deliverables
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