]> bbs.cooldavid.org Git - net-next-2.6.git/blame - drivers/net/ixgb/ixgb_main.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
net: convert multicast list to list_head
[net-next-2.6.git] / drivers / net / ixgb / ixgb_main.c
CommitLineData
1da177e4
LT		 1/*******************************************************************************
2
0abb6eb1 3 Intel PRO/10GbE Linux driver
f731a9ef 4 Copyright(c) 1999 - 2008 Intel Corporation.
0abb6eb1
AK		 5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
1da177e4 13 more details.
0abb6eb1 14
1da177e4 15 You should have received a copy of the GNU General Public License along with
0abb6eb1
AK		 16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
1da177e4
LT		 22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
0abb6eb1 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
1da177e4
LT		 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
29#include "ixgb.h"
30
1da177e4 31char ixgb_driver_name[] = "ixgb";
e9ab1d14 32static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
1da177e4 33
1da177e4 34#define DRIVERNAPI "-NAPI"
f731a9ef 35#define DRV_VERSION "1.0.135-k2" DRIVERNAPI
273dc74e 36const char ixgb_driver_version[] = DRV_VERSION;
f731a9ef 37static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation.";
1da177e4 38
d9fed18b
JB		 39#define IXGB_CB_LENGTH 256
40static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
41module_param(copybreak, uint, 0644);
42MODULE_PARM_DESC(copybreak,
43 "Maximum size of packet that is copied to a new buffer on receive");
44
1da177e4
LT		 45/* ixgb_pci_tbl - PCI Device ID Table
46 *
47 * Wildcard entries (PCI_ANY_ID) should come last
48 * Last entry must be all 0s
49 *
50 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
51 * Class, Class Mask, private data (not used) }
52 */
a3aa1884 53static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl) = {
1da177e4
LT		 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);
3b29a56d
SH		 84static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb,
85 struct net_device *netdev);
1da177e4
LT		 86static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
87static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
88static int ixgb_set_mac(struct net_device *netdev, void *p);
7d12e780 89static irqreturn_t ixgb_intr(int irq, void *data);
446490ca 90static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
ac79c82e 91
7490d71a
JB		 92static int ixgb_clean(struct napi_struct *, int);
93static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
fc2d14e3 94static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);
7490d71a 95
1da177e4 96static void ixgb_tx_timeout(struct net_device *dev);
c4028958 97static void ixgb_tx_timeout_task(struct work_struct *work);
7490d71a 98
1da177e4 99static void ixgb_vlan_rx_register(struct net_device *netdev,
7490d71a 100 struct vlan_group *grp);
222441a6
JP		 101static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
102static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
1da177e4
LT		 103static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
104
1da177e4
LT		 105#ifdef CONFIG_NET_POLL_CONTROLLER
106/* for netdump / net console */
107static void ixgb_netpoll(struct net_device *dev);
108#endif
109
01748fbb 110static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
7490d71a 111 enum pci_channel_state state);
01748fbb
LV		 112static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
113static void ixgb_io_resume (struct pci_dev *pdev);
1da177e4 114
01748fbb
LV		 115static struct pci_error_handlers ixgb_err_handler = {
116 .error_detected = ixgb_io_error_detected,
117 .slot_reset = ixgb_io_slot_reset,
118 .resume = ixgb_io_resume,
119};
120
1da177e4 121static struct pci_driver ixgb_driver = {
c2eba932 122 .name = ixgb_driver_name,
1da177e4 123 .id_table = ixgb_pci_tbl,
c2eba932
MC		 124 .probe = ixgb_probe,
125 .remove = __devexit_p(ixgb_remove),
01748fbb 126 .err_handler = &ixgb_err_handler
1da177e4
LT		 127};
128
129MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
130MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
131MODULE_LICENSE("GPL");
01e5abc2 132MODULE_VERSION(DRV_VERSION);
1da177e4 133
ec9c3f5d
AK		 134#define DEFAULT_DEBUG_LEVEL_SHIFT 3
135static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
136module_param(debug, int, 0);
137MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
138
1da177e4
LT		 139/**
140 * ixgb_init_module - Driver Registration Routine
141 *
142 * ixgb_init_module is the first routine called when the driver is
143 * loaded. All it does is register with the PCI subsystem.
144 **/
145
146static int __init
147ixgb_init_module(void)
148{
1da177e4
LT		 149 printk(KERN_INFO "%s - version %s\n",
150 ixgb_driver_string, ixgb_driver_version);
151
152 printk(KERN_INFO "%s\n", ixgb_copyright);
153
29917620 154 return pci_register_driver(&ixgb_driver);
1da177e4
LT		 155}
156
157module_init(ixgb_init_module);
158
159/**
160 * ixgb_exit_module - Driver Exit Cleanup Routine
161 *
162 * ixgb_exit_module is called just before the driver is removed
163 * from memory.
164 **/
165
166static void __exit
167ixgb_exit_module(void)
168{
1da177e4
LT		 169 pci_unregister_driver(&ixgb_driver);
170}
171
172module_exit(ixgb_exit_module);
173
174/**
175 * ixgb_irq_disable - Mask off interrupt generation on the NIC
176 * @adapter: board private structure
177 **/
178
235949d1 179static void
1da177e4
LT		 180ixgb_irq_disable(struct ixgb_adapter *adapter)
181{
1da177e4
LT		 182 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
183 IXGB_WRITE_FLUSH(&adapter->hw);
184 synchronize_irq(adapter->pdev->irq);
185}
186
187/**
188 * ixgb_irq_enable - Enable default interrupt generation settings
189 * @adapter: board private structure
190 **/
191
235949d1 192static void
1da177e4
LT		 193ixgb_irq_enable(struct ixgb_adapter *adapter)
194{
9c61a9dc
JB		 195 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
196 IXGB_INT_TXDW | IXGB_INT_LSC;
197 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
198 val |= IXGB_INT_GPI0;
199 IXGB_WRITE_REG(&adapter->hw, IMS, val);
200 IXGB_WRITE_FLUSH(&adapter->hw);
1da177e4
LT		 201}
202
203int
204ixgb_up(struct ixgb_adapter *adapter)
205{
206 struct net_device *netdev = adapter->netdev;
fb136c07 207 int err, irq_flags = IRQF_SHARED;
1da177e4
LT		 208 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
209 struct ixgb_hw *hw = &adapter->hw;
210
211 /* hardware has been reset, we need to reload some things */
212
8556f0d1 213 ixgb_rar_set(hw, netdev->dev_addr, 0);
1da177e4
LT		 214 ixgb_set_multi(netdev);
215
216 ixgb_restore_vlan(adapter);
217
218 ixgb_configure_tx(adapter);
219 ixgb_setup_rctl(adapter);
220 ixgb_configure_rx(adapter);
fc2d14e3 221 ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));
1da177e4 222
e59d1696
AK		 223 /* disable interrupts and get the hardware into a known state */
224 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
225
fb136c07
AK		 226 /* only enable MSI if bus is in PCI-X mode */
227 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
228 err = pci_enable_msi(adapter->pdev);
229 if (!err) {
230 adapter->have_msi = 1;
231 irq_flags = 0;
232 }
1da177e4
LT		 233 /* proceed to try to request regular interrupt */
234 }
1da177e4 235
a0607fd3 236 err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags,
fb136c07
AK		 237 netdev->name, netdev);
238 if (err) {
239 if (adapter->have_msi)
240 pci_disable_msi(adapter->pdev);
6909c66d
JP		 241 netif_err(adapter, probe, adapter->netdev,
242 "Unable to allocate interrupt Error: %d\n", err);
1da177e4 243 return err;
ec9c3f5d 244 }
1da177e4 245
03f83041 246 if ((hw->max_frame_size != max_frame) ||
1da177e4
LT		 247 (hw->max_frame_size !=
248 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
249
250 hw->max_frame_size = max_frame;
251
252 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
253
03f83041 254 if (hw->max_frame_size >
1da177e4 255 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
222441a6 256 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
1da177e4 257
03f83041 258 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
1da177e4
LT		 259 ctrl0 |= IXGB_CTRL0_JFE;
260 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
261 }
262 }
263 }
264
bab2bce7 265 clear_bit(__IXGB_DOWN, &adapter->flags);
1da177e4 266
bea3348e 267 napi_enable(&adapter->napi);
e59d1696
AK		 268 ixgb_irq_enable(adapter);
269
4cb9be7a
JB		 270 netif_wake_queue(netdev);
271
bab2bce7
JB		 272 mod_timer(&adapter->watchdog_timer, jiffies);
273
1da177e4
LT		 274 return 0;
275}
276
277void
446490ca 278ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
1da177e4
LT		 279{
280 struct net_device *netdev = adapter->netdev;
281
bab2bce7
JB		 282 /* prevent the interrupt handler from restarting watchdog */
283 set_bit(__IXGB_DOWN, &adapter->flags);
284
49d85c50 285 napi_disable(&adapter->napi);
bab2bce7 286 /* waiting for NAPI to complete can re-enable interrupts */
1da177e4
LT		 287 ixgb_irq_disable(adapter);
288 free_irq(adapter->pdev->irq, netdev);
fb136c07
AK		 289
290 if (adapter->have_msi)
1da177e4
LT		 291 pci_disable_msi(adapter->pdev);
292
03f83041 293 if (kill_watchdog)
1da177e4 294 del_timer_sync(&adapter->watchdog_timer);
49d85c50 295
1da177e4
LT		 296 adapter->link_speed = 0;
297 adapter->link_duplex = 0;
298 netif_carrier_off(netdev);
299 netif_stop_queue(netdev);
300
301 ixgb_reset(adapter);
302 ixgb_clean_tx_ring(adapter);
303 ixgb_clean_rx_ring(adapter);
304}
305
306void
307ixgb_reset(struct ixgb_adapter *adapter)
308{
3fd7131f 309 struct ixgb_hw *hw = &adapter->hw;
1da177e4 310
3fd7131f
MW		 311 ixgb_adapter_stop(hw);
312 if (!ixgb_init_hw(hw))
6909c66d 313 netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n");
3fd7131f
MW		 314
315 /* restore frame size information */
316 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
317 if (hw->max_frame_size >
318 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
319 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
320 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
321 ctrl0 |= IXGB_CTRL0_JFE;
322 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
323 }
324 }
1da177e4
LT		 325}
326
0edc3527
SH		 327static const struct net_device_ops ixgb_netdev_ops = {
328 .ndo_open = ixgb_open,
329 .ndo_stop = ixgb_close,
00829823 330 .ndo_start_xmit = ixgb_xmit_frame,
0edc3527
SH		 331 .ndo_get_stats = ixgb_get_stats,
332 .ndo_set_multicast_list = ixgb_set_multi,
333 .ndo_validate_addr = eth_validate_addr,
334 .ndo_set_mac_address = ixgb_set_mac,
335 .ndo_change_mtu = ixgb_change_mtu,
336 .ndo_tx_timeout = ixgb_tx_timeout,
337 .ndo_vlan_rx_register = ixgb_vlan_rx_register,
338 .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid,
339 .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid,
340#ifdef CONFIG_NET_POLL_CONTROLLER
341 .ndo_poll_controller = ixgb_netpoll,
342#endif
343};
344
1da177e4
LT		 345/**
346 * ixgb_probe - Device Initialization Routine
347 * @pdev: PCI device information struct
348 * @ent: entry in ixgb_pci_tbl
349 *
350 * Returns 0 on success, negative on failure
351 *
352 * ixgb_probe initializes an adapter identified by a pci_dev structure.
353 * The OS initialization, configuring of the adapter private structure,
354 * and a hardware reset occur.
355 **/
356
357static int __devinit
0060c072 358ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 359{
360 struct net_device *netdev = NULL;
361 struct ixgb_adapter *adapter;
362 static int cards_found = 0;
1da177e4
LT		 363 int pci_using_dac;
364 int i;
365 int err;
366
9e7bd330
JB		 367 err = pci_enable_device(pdev);
368 if (err)
1da177e4
LT		 369 return err;
370
6a35528a
YH		 371 if (!(err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) &&
372 !(err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))) {
1da177e4
LT		 373 pci_using_dac = 1;
374 } else {
284901a9
YH		 375 if ((err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) ||
376 (err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))) {
ec9c3f5d
AK		 377 printk(KERN_ERR
378 "ixgb: No usable DMA configuration, aborting\n");
c91e468a 379 goto err_dma_mask;
1da177e4
LT		 380 }
381 pci_using_dac = 0;
382 }
383
9e7bd330
JB		 384 err = pci_request_regions(pdev, ixgb_driver_name);
385 if (err)
c91e468a 386 goto err_request_regions;
1da177e4
LT		 387
388 pci_set_master(pdev);
389
390 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
03f83041 391 if (!netdev) {
1da177e4
LT		 392 err = -ENOMEM;
393 goto err_alloc_etherdev;
394 }
395
1da177e4
LT		 396 SET_NETDEV_DEV(netdev, &pdev->dev);
397
398 pci_set_drvdata(pdev, netdev);
8908c6cd 399 adapter = netdev_priv(netdev);
1da177e4
LT		 400 adapter->netdev = netdev;
401 adapter->pdev = pdev;
402 adapter->hw.back = adapter;
ec9c3f5d 403 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
1da177e4 404
275f165f 405 adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
e539e466 406 if (!adapter->hw.hw_addr) {
1da177e4
LT		 407 err = -EIO;
408 goto err_ioremap;
409 }
410
1459336d 411 for (i = BAR_1; i <= BAR_5; i++) {
03f83041 412 if (pci_resource_len(pdev, i) == 0)
1da177e4 413 continue;
03f83041 414 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 415 adapter->hw.io_base = pci_resource_start(pdev, i);
416 break;
417 }
418 }
419
0edc3527 420 netdev->netdev_ops = &ixgb_netdev_ops;
1da177e4 421 ixgb_set_ethtool_ops(netdev);
9b8118df 422 netdev->watchdog_timeo = 5 * HZ;
bea3348e 423 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4 424
0eb5a34c 425 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 426
427 adapter->bd_number = cards_found;
428 adapter->link_speed = 0;
429 adapter->link_duplex = 0;
430
431 /* setup the private structure */
432
9e7bd330
JB		 433 err = ixgb_sw_init(adapter);
434 if (err)
1da177e4
LT		 435 goto err_sw_init;
436
437 netdev->features = NETIF_F_SG |
438 NETIF_F_HW_CSUM |
439 NETIF_F_HW_VLAN_TX |
440 NETIF_F_HW_VLAN_RX |
441 NETIF_F_HW_VLAN_FILTER;
1da177e4 442 netdev->features |= NETIF_F_TSO;
1da177e4 443
03f83041 444 if (pci_using_dac)
1da177e4
LT		 445 netdev->features |= NETIF_F_HIGHDMA;
446
447 /* make sure the EEPROM is good */
448
03f83041 449 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
6909c66d
JP		 450 netif_err(adapter, probe, adapter->netdev,
451 "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 452 err = -EIO;
453 goto err_eeprom;
454 }
455
456 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
df859c51 457 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1da177e4 458
03f83041 459 if (!is_valid_ether_addr(netdev->perm_addr)) {
6909c66d 460 netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n");
1da177e4
LT		 461 err = -EIO;
462 goto err_eeprom;
463 }
464
465 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
466
467 init_timer(&adapter->watchdog_timer);
468 adapter->watchdog_timer.function = &ixgb_watchdog;
469 adapter->watchdog_timer.data = (unsigned long)adapter;
470
c4028958 471 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 472
ec9c3f5d 473 strcpy(netdev->name, "eth%d");
9e7bd330
JB		 474 err = register_netdev(netdev);
475 if (err)
1da177e4
LT		 476 goto err_register;
477
3a6d1bc4 478 /* carrier off reporting is important to ethtool even BEFORE open */
1da177e4 479 netif_carrier_off(netdev);
1da177e4 480
6909c66d
JP		 481 netif_info(adapter, probe, adapter->netdev,
482 "Intel(R) PRO/10GbE Network Connection\n");
1da177e4
LT		 483 ixgb_check_options(adapter);
484 /* reset the hardware with the new settings */
485
486 ixgb_reset(adapter);
487
488 cards_found++;
489 return 0;
490
491err_register:
492err_sw_init:
493err_eeprom:
494 iounmap(adapter->hw.hw_addr);
495err_ioremap:
496 free_netdev(netdev);
497err_alloc_etherdev:
498 pci_release_regions(pdev);
c91e468a
AS		 499err_request_regions:
500err_dma_mask:
501 pci_disable_device(pdev);
1da177e4
LT		 502 return err;
503}
504
505/**
506 * ixgb_remove - Device Removal Routine
507 * @pdev: PCI device information struct
508 *
509 * ixgb_remove is called by the PCI subsystem to alert the driver
510 * that it should release a PCI device. The could be caused by a
511 * Hot-Plug event, or because the driver is going to be removed from
512 * memory.
513 **/
514
515static void __devexit
516ixgb_remove(struct pci_dev *pdev)
517{
518 struct net_device *netdev = pci_get_drvdata(pdev);
8908c6cd 519 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 520
12579697
JB		 521 flush_scheduled_work();
522
1da177e4
LT		 523 unregister_netdev(netdev);
524
525 iounmap(adapter->hw.hw_addr);
526 pci_release_regions(pdev);
527
528 free_netdev(netdev);
529}
530
531/**
532 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
533 * @adapter: board private structure to initialize
534 *
535 * ixgb_sw_init initializes the Adapter private data structure.
536 * Fields are initialized based on PCI device information and
537 * OS network device settings (MTU size).
538 **/
539
540static int __devinit
541ixgb_sw_init(struct ixgb_adapter *adapter)
542{
543 struct ixgb_hw *hw = &adapter->hw;
544 struct net_device *netdev = adapter->netdev;
545 struct pci_dev *pdev = adapter->pdev;
546
547 /* PCI config space info */
548
549 hw->vendor_id = pdev->vendor;
550 hw->device_id = pdev->device;
551 hw->subsystem_vendor_id = pdev->subsystem_vendor;
552 hw->subsystem_id = pdev->subsystem_device;
553
1da177e4 554 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
a3dc3da0 555 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
1da177e4 556
6909c66d
JP		 557 if ((hw->device_id == IXGB_DEVICE_ID_82597EX) ||
558 (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) ||
559 (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) ||
560 (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
0060c072 561 hw->mac_type = ixgb_82597;
1da177e4
LT		 562 else {
563 /* should never have loaded on this device */
6909c66d 564 netif_err(adapter, probe, adapter->netdev, "unsupported device id\n");
1da177e4
LT		 565 }
566
567 /* enable flow control to be programmed */
568 hw->fc.send_xon = 1;
569
bab2bce7 570 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 571 return 0;
572}
573
574/**
575 * ixgb_open - Called when a network interface is made active
576 * @netdev: network interface device structure
577 *
578 * Returns 0 on success, negative value on failure
579 *
580 * The open entry point is called when a network interface is made
581 * active by the system (IFF_UP). At this point all resources needed
582 * for transmit and receive operations are allocated, the interrupt
583 * handler is registered with the OS, the watchdog timer is started,
584 * and the stack is notified that the interface is ready.
585 **/
586
587static int
588ixgb_open(struct net_device *netdev)
589{
8908c6cd 590 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 591 int err;
592
593 /* allocate transmit descriptors */
9e7bd330
JB		 594 err = ixgb_setup_tx_resources(adapter);
595 if (err)
1da177e4
LT		 596 goto err_setup_tx;
597
3a6d1bc4
JB		 598 netif_carrier_off(netdev);
599
1da177e4
LT		 600 /* allocate receive descriptors */
601
9e7bd330
JB		 602 err = ixgb_setup_rx_resources(adapter);
603 if (err)
1da177e4
LT		 604 goto err_setup_rx;
605
9e7bd330
JB		 606 err = ixgb_up(adapter);
607 if (err)
1da177e4
LT		 608 goto err_up;
609
3a6d1bc4
JB		 610 netif_start_queue(netdev);
611
1da177e4
LT		 612 return 0;
613
614err_up:
615 ixgb_free_rx_resources(adapter);
616err_setup_rx:
617 ixgb_free_tx_resources(adapter);
618err_setup_tx:
619 ixgb_reset(adapter);
620
621 return err;
622}
623
624/**
625 * ixgb_close - Disables a network interface
626 * @netdev: network interface device structure
627 *
628 * Returns 0, this is not allowed to fail
629 *
630 * The close entry point is called when an interface is de-activated
631 * by the OS. The hardware is still under the drivers control, but
632 * needs to be disabled. A global MAC reset is issued to stop the
633 * hardware, and all transmit and receive resources are freed.
634 **/
635
636static int
637ixgb_close(struct net_device *netdev)
638{
8908c6cd 639 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 640
446490ca 641 ixgb_down(adapter, true);
1da177e4
LT		 642
643 ixgb_free_tx_resources(adapter);
644 ixgb_free_rx_resources(adapter);
645
646 return 0;
647}
648
649/**
650 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
651 * @adapter: board private structure
652 *
653 * Return 0 on success, negative on failure
654 **/
655
656int
657ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
658{
659 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
660 struct pci_dev *pdev = adapter->pdev;
661 int size;
662
663 size = sizeof(struct ixgb_buffer) * txdr->count;
664 txdr->buffer_info = vmalloc(size);
03f83041 665 if (!txdr->buffer_info) {
6909c66d
JP		 666 netif_err(adapter, probe, adapter->netdev,
667 "Unable to allocate transmit descriptor ring memory\n");
1da177e4
LT		 668 return -ENOMEM;
669 }
670 memset(txdr->buffer_info, 0, size);
671
672 /* round up to nearest 4K */
673
674 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 675 txdr->size = ALIGN(txdr->size, 4096);
1da177e4
LT		 676
677 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
03f83041 678 if (!txdr->desc) {
1da177e4 679 vfree(txdr->buffer_info);
6909c66d
JP		 680 netif_err(adapter, probe, adapter->netdev,
681 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 682 return -ENOMEM;
683 }
684 memset(txdr->desc, 0, txdr->size);
685
686 txdr->next_to_use = 0;
687 txdr->next_to_clean = 0;
688
689 return 0;
690}
691
692/**
693 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
694 * @adapter: board private structure
695 *
696 * Configure the Tx unit of the MAC after a reset.
697 **/
698
699static void
700ixgb_configure_tx(struct ixgb_adapter *adapter)
701{
222441a6
JP		 702 u64 tdba = adapter->tx_ring.dma;
703 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
704 u32 tctl;
1da177e4
LT		 705 struct ixgb_hw *hw = &adapter->hw;
706
0060c072
JB		 707 /* Setup the Base and Length of the Tx Descriptor Ring
708 * tx_ring.dma can be either a 32 or 64 bit value
1da177e4
LT		 709 */
710
711 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
712 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
713
714 IXGB_WRITE_REG(hw, TDLEN, tdlen);
715
716 /* Setup the HW Tx Head and Tail descriptor pointers */
717
718 IXGB_WRITE_REG(hw, TDH, 0);
719 IXGB_WRITE_REG(hw, TDT, 0);
720
721 /* don't set up txdctl, it induces performance problems if configured
722 * incorrectly */
723 /* Set the Tx Interrupt Delay register */
724
725 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
726
727 /* Program the Transmit Control Register */
728
729 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
730 IXGB_WRITE_REG(hw, TCTL, tctl);
731
732 /* Setup Transmit Descriptor Settings for this adapter */
733 adapter->tx_cmd_type =
0060c072
JB		 734 IXGB_TX_DESC_TYPE |
735 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
1da177e4
LT		 736}
737
738/**
739 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
740 * @adapter: board private structure
741 *
742 * Returns 0 on success, negative on failure
743 **/
744
745int
746ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
747{
748 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
749 struct pci_dev *pdev = adapter->pdev;
750 int size;
751
752 size = sizeof(struct ixgb_buffer) * rxdr->count;
753 rxdr->buffer_info = vmalloc(size);
03f83041 754 if (!rxdr->buffer_info) {
6909c66d
JP		 755 netif_err(adapter, probe, adapter->netdev,
756 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 757 return -ENOMEM;
758 }
759 memset(rxdr->buffer_info, 0, size);
760
761 /* Round up to nearest 4K */
762
763 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 764 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4
LT		 765
766 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
767
03f83041 768 if (!rxdr->desc) {
1da177e4 769 vfree(rxdr->buffer_info);
6909c66d
JP		 770 netif_err(adapter, probe, adapter->netdev,
771 "Unable to allocate receive descriptors\n");
1da177e4
LT		 772 return -ENOMEM;
773 }
774 memset(rxdr->desc, 0, rxdr->size);
775
776 rxdr->next_to_clean = 0;
777 rxdr->next_to_use = 0;
778
779 return 0;
780}
781
782/**
783 * ixgb_setup_rctl - configure the receive control register
784 * @adapter: Board private structure
785 **/
786
787static void
788ixgb_setup_rctl(struct ixgb_adapter *adapter)
789{
222441a6 790 u32 rctl;
1da177e4
LT		 791
792 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
793
794 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
795
796 rctl |=
0060c072
JB		 797 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
798 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
1da177e4
LT		 799 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
800
801 rctl |= IXGB_RCTL_SECRC;
802
3f3dc0dd 803 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 804 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 805 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 806 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 807 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 808 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 809 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 810 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 811
812 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
813}
814
815/**
816 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
817 * @adapter: board private structure
818 *
819 * Configure the Rx unit of the MAC after a reset.
820 **/
821
822static void
823ixgb_configure_rx(struct ixgb_adapter *adapter)
824{
222441a6
JP		 825 u64 rdba = adapter->rx_ring.dma;
826 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 827 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 828 u32 rctl;
829 u32 rxcsum;
1da177e4
LT		 830
831 /* make sure receives are disabled while setting up the descriptors */
832
833 rctl = IXGB_READ_REG(hw, RCTL);
834 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
835
836 /* set the Receive Delay Timer Register */
837
838 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
839
840 /* Setup the Base and Length of the Rx Descriptor Ring */
841
842 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
843 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
844
845 IXGB_WRITE_REG(hw, RDLEN, rdlen);
846
847 /* Setup the HW Rx Head and Tail Descriptor Pointers */
848 IXGB_WRITE_REG(hw, RDH, 0);
849 IXGB_WRITE_REG(hw, RDT, 0);
850
4360386f
JB		 851 /* due to the hardware errata with RXDCTL, we are unable to use any of
852 * the performance enhancing features of it without causing other
853 * subtle bugs, some of the bugs could include receive length
854 * corruption at high data rates (WTHRESH > 0) and/or receive
855 * descriptor ring irregularites (particularly in hardware cache) */
856 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 857
858 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 859 if (adapter->rx_csum) {
1da177e4
LT		 860 rxcsum = IXGB_READ_REG(hw, RXCSUM);
861 rxcsum |= IXGB_RXCSUM_TUOFL;
862 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
863 }
864
865 /* Enable Receives */
866
867 IXGB_WRITE_REG(hw, RCTL, rctl);
868}
869
870/**
871 * ixgb_free_tx_resources - Free Tx Resources
872 * @adapter: board private structure
873 *
874 * Free all transmit software resources
875 **/
876
877void
878ixgb_free_tx_resources(struct ixgb_adapter *adapter)
879{
880 struct pci_dev *pdev = adapter->pdev;
881
882 ixgb_clean_tx_ring(adapter);
883
884 vfree(adapter->tx_ring.buffer_info);
885 adapter->tx_ring.buffer_info = NULL;
886
887 pci_free_consistent(pdev, adapter->tx_ring.size,
888 adapter->tx_ring.desc, adapter->tx_ring.dma);
889
890 adapter->tx_ring.desc = NULL;
891}
892
235949d1 893static void
1da177e4 894ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
0060c072 895 struct ixgb_buffer *buffer_info)
1da177e4 896{
adeaa908
AD		 897 if (buffer_info->dma) {
898 if (buffer_info->mapped_as_page)
899 pci_unmap_page(adapter->pdev, buffer_info->dma,
900 buffer_info->length, PCI_DMA_TODEVICE);
901 else
902 pci_unmap_single(adapter->pdev, buffer_info->dma,
903 buffer_info->length,
904 PCI_DMA_TODEVICE);
905 buffer_info->dma = 0;
906 }
907
fe52eeb8 908 if (buffer_info->skb) {
fe52eeb8
AD		 909 dev_kfree_skb_any(buffer_info->skb);
910 buffer_info->skb = NULL;
911 }
1dfdd7df
AK		 912 buffer_info->time_stamp = 0;
913 /* these fields must always be initialized in tx
914 * buffer_info->length = 0;
915 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 916}
917
918/**
919 * ixgb_clean_tx_ring - Free Tx Buffers
920 * @adapter: board private structure
921 **/
922
923static void
924ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
925{
926 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
927 struct ixgb_buffer *buffer_info;
928 unsigned long size;
929 unsigned int i;
930
931 /* Free all the Tx ring sk_buffs */
932
1459336d 933 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 934 buffer_info = &tx_ring->buffer_info[i];
935 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
936 }
937
938 size = sizeof(struct ixgb_buffer) * tx_ring->count;
939 memset(tx_ring->buffer_info, 0, size);
940
941 /* Zero out the descriptor ring */
942
943 memset(tx_ring->desc, 0, tx_ring->size);
944
945 tx_ring->next_to_use = 0;
946 tx_ring->next_to_clean = 0;
947
948 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
949 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
950}
951
952/**
953 * ixgb_free_rx_resources - Free Rx Resources
954 * @adapter: board private structure
955 *
956 * Free all receive software resources
957 **/
958
959void
960ixgb_free_rx_resources(struct ixgb_adapter *adapter)
961{
962 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
963 struct pci_dev *pdev = adapter->pdev;
964
965 ixgb_clean_rx_ring(adapter);
966
967 vfree(rx_ring->buffer_info);
968 rx_ring->buffer_info = NULL;
969
970 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
971
972 rx_ring->desc = NULL;
973}
974
975/**
976 * ixgb_clean_rx_ring - Free Rx Buffers
977 * @adapter: board private structure
978 **/
979
980static void
981ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
982{
983 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
984 struct ixgb_buffer *buffer_info;
985 struct pci_dev *pdev = adapter->pdev;
986 unsigned long size;
987 unsigned int i;
988
989 /* Free all the Rx ring sk_buffs */
990
1459336d 991 for (i = 0; i < rx_ring->count; i++) {
1da177e4 992 buffer_info = &rx_ring->buffer_info[i];
23e55a32 993 if (buffer_info->dma) {
1da177e4
LT		 994 pci_unmap_single(pdev,
995 buffer_info->dma,
996 buffer_info->length,
997 PCI_DMA_FROMDEVICE);
23e55a32
BJ		 998 buffer_info->dma = 0;
999 buffer_info->length = 0;
1000 }
1da177e4 1001
23e55a32 1002 if (buffer_info->skb) {
1da177e4 1003 dev_kfree_skb(buffer_info->skb);
1da177e4
LT		 1004 buffer_info->skb = NULL;
1005 }
1006 }
1007
1008 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1009 memset(rx_ring->buffer_info, 0, size);
1010
1011 /* Zero out the descriptor ring */
1012
1013 memset(rx_ring->desc, 0, rx_ring->size);
1014
1015 rx_ring->next_to_clean = 0;
1016 rx_ring->next_to_use = 0;
1017
1018 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1019 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1020}
1021
1022/**
1023 * ixgb_set_mac - Change the Ethernet Address of the NIC
1024 * @netdev: network interface device structure
1025 * @p: pointer to an address structure
1026 *
1027 * Returns 0 on success, negative on failure
1028 **/
1029
1030static int
1031ixgb_set_mac(struct net_device *netdev, void *p)
1032{
8908c6cd 1033 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1034 struct sockaddr *addr = p;
1035
03f83041 1036 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1037 return -EADDRNOTAVAIL;
1038
1039 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1040
1041 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1042
1043 return 0;
1044}
1045
1046/**
1047 * ixgb_set_multi - Multicast and Promiscuous mode set
1048 * @netdev: network interface device structure
1049 *
1050 * The set_multi entry point is called whenever the multicast address
1051 * list or the network interface flags are updated. This routine is
1052 * responsible for configuring the hardware for proper multicast,
1053 * promiscuous mode, and all-multi behavior.
1054 **/
1055
1056static void
1057ixgb_set_multi(struct net_device *netdev)
1058{
8908c6cd 1059 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1060 struct ixgb_hw *hw = &adapter->hw;
22bedad3 1061 struct netdev_hw_addr *ha;
222441a6 1062 u32 rctl;
1da177e4
LT		 1063 int i;
1064
1065 /* Check for Promiscuous and All Multicast modes */
1066
1067 rctl = IXGB_READ_REG(hw, RCTL);
1068
03f83041 1069 if (netdev->flags & IFF_PROMISC) {
1da177e4 1070 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
746b9f02 1071 rctl &= ~IXGB_RCTL_VFE;
1da177e4 1072 } else {
746b9f02
PM		 1073 if (netdev->flags & IFF_ALLMULTI) {
1074 rctl |= IXGB_RCTL_MPE;
1075 rctl &= ~IXGB_RCTL_UPE;
1076 } else {
1077 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1078 }
78ed11a5 1079 rctl |= IXGB_RCTL_VFE;
1da177e4
LT		 1080 }
1081
4cd24eaf 1082 if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1083 rctl |= IXGB_RCTL_MPE;
1084 IXGB_WRITE_REG(hw, RCTL, rctl);
1085 } else {
222441a6 1086 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1087 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1088
1089 IXGB_WRITE_REG(hw, RCTL, rctl);
1090
48e2f183 1091 i = 0;
22bedad3 1092 netdev_for_each_mc_addr(ha, netdev)
48e2f183 1093 memcpy(&mta[i++ * IXGB_ETH_LENGTH_OF_ADDRESS],
22bedad3 1094 ha->addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1da177e4 1095
4cd24eaf 1096 ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0);
1da177e4
LT		 1097 }
1098}
1099
1100/**
1101 * ixgb_watchdog - Timer Call-back
1102 * @data: pointer to netdev cast into an unsigned long
1103 **/
1104
1105static void
1106ixgb_watchdog(unsigned long data)
1107{
1108 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1109 struct net_device *netdev = adapter->netdev;
1110 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1111
1112 ixgb_check_for_link(&adapter->hw);
1113
1114 if (ixgb_check_for_bad_link(&adapter->hw)) {
1115 /* force the reset path */
1116 netif_stop_queue(netdev);
1117 }
1118
03f83041
JB		 1119 if (adapter->hw.link_up) {
1120 if (!netif_carrier_ok(netdev)) {
d276016c
JK		 1121 printk(KERN_INFO "ixgb: %s NIC Link is Up 10 Gbps "
1122 "Full Duplex, Flow Control: %s\n",
1123 netdev->name,
1124 (adapter->hw.fc.type == ixgb_fc_full) ?
1125 "RX/TX" :
1126 ((adapter->hw.fc.type == ixgb_fc_rx_pause) ?
1127 "RX" :
1128 ((adapter->hw.fc.type == ixgb_fc_tx_pause) ?
1129 "TX" : "None")));
1da177e4
LT		 1130 adapter->link_speed = 10000;
1131 adapter->link_duplex = FULL_DUPLEX;
1132 netif_carrier_on(netdev);
1da177e4
LT		 1133 }
1134 } else {
03f83041 1135 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1136 adapter->link_speed = 0;
1137 adapter->link_duplex = 0;
d276016c
JK		 1138 printk(KERN_INFO "ixgb: %s NIC Link is Down\n",
1139 netdev->name);
1da177e4 1140 netif_carrier_off(netdev);
1da177e4
LT		 1141 }
1142 }
1143
1144 ixgb_update_stats(adapter);
1145
03f83041
JB		 1146 if (!netif_carrier_ok(netdev)) {
1147 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1148 /* We've lost link, so the controller stops DMA,
1149 * but we've got queued Tx work that's never going
1150 * to get done, so reset controller to flush Tx.
1151 * (Do the reset outside of interrupt context). */
1152 schedule_work(&adapter->tx_timeout_task);
c2d5ab49
JB		 1153 /* return immediately since reset is imminent */
1154 return;
1da177e4
LT		 1155 }
1156 }
1157
1158 /* Force detection of hung controller every watchdog period */
446490ca 1159 adapter->detect_tx_hung = true;
1da177e4
LT		 1160
1161 /* generate an interrupt to force clean up of any stragglers */
1162 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1163
1164 /* Reset the timer */
1165 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1166}
1167
1168#define IXGB_TX_FLAGS_CSUM 0x00000001
1169#define IXGB_TX_FLAGS_VLAN 0x00000002
1170#define IXGB_TX_FLAGS_TSO 0x00000004
1171
235949d1 1172static int
1da177e4
LT		 1173ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1174{
1da177e4
LT		 1175 struct ixgb_context_desc *context_desc;
1176 unsigned int i;
222441a6
JP		 1177 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1178 u16 ipcse, tucse, mss;
1da177e4
LT		 1179 int err;
1180
89114afd 1181 if (likely(skb_is_gso(skb))) {
adc54139 1182 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1183 struct iphdr *iph;
1184
1da177e4
LT		 1185 if (skb_header_cloned(skb)) {
1186 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1187 if (err)
1188 return err;
1189 }
1190
ab6a5bb6 1191 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1192 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1193 iph = ip_hdr(skb);
1194 iph->tot_len = 0;
1195 iph->check = 0;
aa8223c7
ACM		 1196 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1197 iph->daddr, 0,
1198 IPPROTO_TCP, 0);
bbe735e4 1199 ipcss = skb_network_offset(skb);
eddc9ec5 1200 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1201 ipcse = skb_transport_offset(skb) - 1;
1202 tucss = skb_transport_offset(skb);
aa8223c7 1203 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1204 tucse = 0;
1205
1206 i = adapter->tx_ring.next_to_use;
1207 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1208 buffer_info = &adapter->tx_ring.buffer_info[i];
1209 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1210
1211 context_desc->ipcss = ipcss;
1212 context_desc->ipcso = ipcso;
1213 context_desc->ipcse = cpu_to_le16(ipcse);
1214 context_desc->tucss = tucss;
1215 context_desc->tucso = tucso;
1216 context_desc->tucse = cpu_to_le16(tucse);
1217 context_desc->mss = cpu_to_le16(mss);
1218 context_desc->hdr_len = hdr_len;
1219 context_desc->status = 0;
1220 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1221 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1222 | IXGB_CONTEXT_DESC_CMD_TSE
1223 | IXGB_CONTEXT_DESC_CMD_IP
1224 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1225 | IXGB_CONTEXT_DESC_CMD_IDE
1226 | (skb->len - (hdr_len)));
1227
06c2f9ec 1228
03f83041 1229 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1230 adapter->tx_ring.next_to_use = i;
1231
1232 return 1;
1233 }
1da177e4
LT		 1234
1235 return 0;
1236}
1237
446490ca 1238static bool
1da177e4
LT		 1239ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1240{
1241 struct ixgb_context_desc *context_desc;
1242 unsigned int i;
222441a6 1243 u8 css, cso;
1da177e4 1244
03f83041 1245 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1246 struct ixgb_buffer *buffer_info;
ea2ae17d 1247 css = skb_transport_offset(skb);
ff1dcadb 1248 cso = css + skb->csum_offset;
1da177e4
LT		 1249
1250 i = adapter->tx_ring.next_to_use;
1251 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1252 buffer_info = &adapter->tx_ring.buffer_info[i];
1253 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1254
1255 context_desc->tucss = css;
1256 context_desc->tucso = cso;
1257 context_desc->tucse = 0;
1258 /* zero out any previously existing data in one instruction */
222441a6 1259 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1260 context_desc->status = 0;
1261 context_desc->hdr_len = 0;
1262 context_desc->mss = 0;
1263 context_desc->cmd_type_len =
1264 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1265 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1266
03f83041 1267 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1268 adapter->tx_ring.next_to_use = i;
1269
446490ca 1270 return true;
1da177e4
LT		 1271 }
1272
446490ca 1273 return false;
1da177e4
LT		 1274}
1275
1276#define IXGB_MAX_TXD_PWR 14
1277#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1278
235949d1 1279static int
1da177e4
LT		 1280ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1281 unsigned int first)
1282{
1283 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
adeaa908 1284 struct pci_dev *pdev = adapter->pdev;
1da177e4 1285 struct ixgb_buffer *buffer_info;
fe52eeb8 1286 int len = skb_headlen(skb);
1da177e4 1287 unsigned int offset = 0, size, count = 0, i;
5d927853 1288 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1289 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1290 unsigned int f;
1da177e4
LT		 1291
1292 i = tx_ring->next_to_use;
1293
9a432992 1294 while (len) {
1da177e4 1295 buffer_info = &tx_ring->buffer_info[i];
709cf018 1296 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1297 /* Workaround for premature desc write-backs
1298 * in TSO mode. Append 4-byte sentinel desc */
1299 if (unlikely(mss && !nr_frags && size == len && size > 8))
1300 size -= 4;
1301
1da177e4 1302 buffer_info->length = size;
adc54139 1303 WARN_ON(buffer_info->dma != 0);
34336635 1304 buffer_info->time_stamp = jiffies;
adeaa908
AD		 1305 buffer_info->mapped_as_page = false;
1306 buffer_info->dma = pci_map_single(pdev, skb->data + offset,
1307 size, PCI_DMA_TODEVICE);
1308 if (pci_dma_mapping_error(pdev, buffer_info->dma))
1309 goto dma_error;
1dfdd7df 1310 buffer_info->next_to_watch = 0;
1da177e4
LT		 1311
1312 len -= size;
1313 offset += size;
1314 count++;
fe52eeb8
AD		 1315 if (len) {
1316 i++;
1317 if (i == tx_ring->count)
1318 i = 0;
1319 }
1da177e4
LT		 1320 }
1321
1459336d 1322 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 1323 struct skb_frag_struct *frag;
1324
1325 frag = &skb_shinfo(skb)->frags[f];
1326 len = frag->size;
adeaa908 1327 offset = frag->page_offset;
1da177e4 1328
9a432992 1329 while (len) {
fe52eeb8
AD		 1330 i++;
1331 if (i == tx_ring->count)
1332 i = 0;
1333
1da177e4 1334 buffer_info = &tx_ring->buffer_info[i];
709cf018 1335 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1336
1337 /* Workaround for premature desc write-backs
1338 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1339 if (unlikely(mss && (f == (nr_frags - 1))
1340 && size == len && size > 8))
5d927853
JB		 1341 size -= 4;
1342
1da177e4 1343 buffer_info->length = size;
34336635 1344 buffer_info->time_stamp = jiffies;
adeaa908
AD		 1345 buffer_info->mapped_as_page = true;
1346 buffer_info->dma =
1347 pci_map_page(pdev, frag->page,
1348 offset, size,
1349 PCI_DMA_TODEVICE);
1350 if (pci_dma_mapping_error(pdev, buffer_info->dma))
1351 goto dma_error;
1dfdd7df 1352 buffer_info->next_to_watch = 0;
1da177e4
LT		 1353
1354 len -= size;
1355 offset += size;
1356 count++;
1da177e4
LT		 1357 }
1358 }
1da177e4
LT		 1359 tx_ring->buffer_info[i].skb = skb;
1360 tx_ring->buffer_info[first].next_to_watch = i;
1361
1362 return count;
adeaa908
AD		 1363
1364dma_error:
1365 dev_err(&pdev->dev, "TX DMA map failed\n");
1366 buffer_info->dma = 0;
c1fa347f 1367 if (count)
adeaa908 1368 count--;
c1fa347f
RK		 1369
1370 while (count--) {
1371 if (i==0)
adeaa908 1372 i += tx_ring->count;
c1fa347f 1373 i--;
adeaa908
AD		 1374 buffer_info = &tx_ring->buffer_info[i];
1375 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1376 }
1377
1378 return 0;
1da177e4
LT		 1379}
1380
235949d1 1381static void
1da177e4
LT		 1382ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1383{
1384 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1385 struct ixgb_tx_desc *tx_desc = NULL;
1386 struct ixgb_buffer *buffer_info;
222441a6
JP		 1387 u32 cmd_type_len = adapter->tx_cmd_type;
1388 u8 status = 0;
1389 u8 popts = 0;
1da177e4
LT		 1390 unsigned int i;
1391
03f83041 1392 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1393 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1394 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1395 }
1396
03f83041 1397 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1398 popts |= IXGB_TX_DESC_POPTS_TXSM;
1399
03f83041 1400 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1401 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1402
1403 i = tx_ring->next_to_use;
1404
9a432992 1405 while (count--) {
1da177e4
LT		 1406 buffer_info = &tx_ring->buffer_info[i];
1407 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1408 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1409 tx_desc->cmd_type_len =
1410 cpu_to_le32(cmd_type_len | buffer_info->length);
1411 tx_desc->status = status;
1412 tx_desc->popts = popts;
1413 tx_desc->vlan = cpu_to_le16(vlan_id);
1414
03f83041 1415 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1416 }
1417
0060c072
JB		 1418 tx_desc->cmd_type_len |=
1419 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1420
1421 /* Force memory writes to complete before letting h/w
1422 * know there are new descriptors to fetch. (Only
1423 * applicable for weak-ordered memory model archs,
1424 * such as IA-64). */
1425 wmb();
1426
1427 tx_ring->next_to_use = i;
1428 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1429}
1430
dfd341e4
JB		 1431static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1432{
1433 struct ixgb_adapter *adapter = netdev_priv(netdev);
1434 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1435
1436 netif_stop_queue(netdev);
1437 /* Herbert's original patch had:
1438 * smp_mb__after_netif_stop_queue();
1439 * but since that doesn't exist yet, just open code it. */
1440 smp_mb();
1441
1442 /* We need to check again in a case another CPU has just
1443 * made room available. */
1444 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1445 return -EBUSY;
1446
1447 /* A reprieve! */
1448 netif_start_queue(netdev);
1449 ++adapter->restart_queue;
1450 return 0;
1451}
1452
1453static int ixgb_maybe_stop_tx(struct net_device *netdev,
1454 struct ixgb_desc_ring *tx_ring, int size)
1455{
1456 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1457 return 0;
1458 return __ixgb_maybe_stop_tx(netdev, size);
1459}
1460
1461
1da177e4
LT		 1462/* Tx Descriptors needed, worst case */
1463#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1464 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1465#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1466 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1467 + 1 /* one more needed for sentinel TSO workaround */
1da177e4 1468
3b29a56d 1469static netdev_tx_t
1da177e4
LT		 1470ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1471{
8908c6cd 1472 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1473 unsigned int first;
1474 unsigned int tx_flags = 0;
1da177e4 1475 int vlan_id = 0;
fe52eeb8 1476 int count = 0;
1da177e4
LT		 1477 int tso;
1478
bab2bce7
JB		 1479 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1480 dev_kfree_skb(skb);
1481 return NETDEV_TX_OK;
1482 }
1483
03f83041 1484 if (skb->len <= 0) {
c2199340 1485 dev_kfree_skb(skb);
6ed10654 1486 return NETDEV_TX_OK;
1da177e4
LT		 1487 }
1488
dfd341e4 1489 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1490 DESC_NEEDED)))
f017f14b 1491 return NETDEV_TX_BUSY;
1da177e4 1492
03f83041 1493 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1da177e4
LT		 1494 tx_flags |= IXGB_TX_FLAGS_VLAN;
1495 vlan_id = vlan_tx_tag_get(skb);
1496 }
1497
1498 first = adapter->tx_ring.next_to_use;
0060c072 1499
1da177e4
LT		 1500 tso = ixgb_tso(adapter, skb);
1501 if (tso < 0) {
c2199340 1502 dev_kfree_skb(skb);
1da177e4
LT		 1503 return NETDEV_TX_OK;
1504 }
1505
96f9c2e2 1506 if (likely(tso))
1da177e4 1507 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1508 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1509 tx_flags |= IXGB_TX_FLAGS_CSUM;
1510
fe52eeb8 1511 count = ixgb_tx_map(adapter, skb, first);
1da177e4 1512
fe52eeb8
AD		 1513 if (count) {
1514 ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
fe52eeb8
AD		 1515 /* Make sure there is space in the ring for the next send. */
1516 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1da177e4 1517
fe52eeb8
AD		 1518 } else {
1519 dev_kfree_skb_any(skb);
1520 adapter->tx_ring.buffer_info[first].time_stamp = 0;
1521 adapter->tx_ring.next_to_use = first;
1522 }
f017f14b 1523
f017f14b 1524 return NETDEV_TX_OK;
1da177e4
LT		 1525}
1526
1527/**
1528 * ixgb_tx_timeout - Respond to a Tx Hang
1529 * @netdev: network interface device structure
1530 **/
1531
1532static void
1533ixgb_tx_timeout(struct net_device *netdev)
1534{
8908c6cd 1535 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1536
1537 /* Do the reset outside of interrupt context */
1538 schedule_work(&adapter->tx_timeout_task);
1539}
1540
1541static void
c4028958 1542ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1543{
c4028958
DH		 1544 struct ixgb_adapter *adapter =
1545 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1546
9b8118df 1547 adapter->tx_timeout_count++;
446490ca 1548 ixgb_down(adapter, true);
1da177e4
LT		 1549 ixgb_up(adapter);
1550}
1551
1552/**
1553 * ixgb_get_stats - Get System Network Statistics
1554 * @netdev: network interface device structure
1555 *
1556 * Returns the address of the device statistics structure.
1557 * The statistics are actually updated from the timer callback.
1558 **/
1559
1560static struct net_device_stats *
1561ixgb_get_stats(struct net_device *netdev)
1562{
0cdc0369 1563 return &netdev->stats;
1da177e4
LT		 1564}
1565
1566/**
1567 * ixgb_change_mtu - Change the Maximum Transfer Unit
1568 * @netdev: network interface device structure
1569 * @new_mtu: new value for maximum frame size
1570 *
1571 * Returns 0 on success, negative on failure
1572 **/
1573
1574static int
1575ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1576{
8908c6cd 1577 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1578 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1579 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1580
a65a604a
JB		 1581 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1582 if ((new_mtu < 68) ||
1583 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
6909c66d
JP		 1584 netif_err(adapter, probe, adapter->netdev,
1585 "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1586 return -EINVAL;
1587 }
1588
b5ca88eb
JB		 1589 if (old_max_frame == max_frame)
1590 return 0;
1591
1592 if (netif_running(netdev))
1593 ixgb_down(adapter, true);
1594
a3dc3da0 1595 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1596
1597 netdev->mtu = new_mtu;
1598
b5ca88eb 1599 if (netif_running(netdev))
1da177e4 1600 ixgb_up(adapter);
1da177e4
LT		 1601
1602 return 0;
1603}
1604
1605/**
1606 * ixgb_update_stats - Update the board statistics counters.
1607 * @adapter: board private structure
1608 **/
1609
1610void
1611ixgb_update_stats(struct ixgb_adapter *adapter)
1612{
5633684d 1613 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1614 struct pci_dev *pdev = adapter->pdev;
1615
1616 /* Prevent stats update while adapter is being reset */
81b1955e 1617 if (pci_channel_offline(pdev))
01748fbb 1618 return;
5633684d 1619
03f83041 1620 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
4cd24eaf 1621 (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
5633684d
MC		 1622 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1623 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1624 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1625 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1626
1627 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1628 /* fix up multicast stats by removing broadcasts */
03f83041 1629 if (multi >= bcast)
7b89178d 1630 multi -= bcast;
0060c072 1631
5633684d
MC		 1632 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1633 adapter->stats.mprch += (multi >> 32);
0060c072 1634 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1635 adapter->stats.bprch += bcast_h;
1636 } else {
1637 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1638 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1639 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1640 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1641 }
1da177e4
LT		 1642 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1643 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1644 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1645 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1646 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1647 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1648 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1649 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1650 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1651 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1652 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1653 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1654 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1655 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1656 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1657 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1658 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1659 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1660 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1661 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1662 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1663 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1664 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1665 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1666 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1667 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1668 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1669 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1670 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1671 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1672 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1673 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1674 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1675 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1676 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1677 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1678 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1679 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1680 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1681 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1682 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1683 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1684 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1685 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1686 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1687 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1688 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1689 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1690 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1691 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1692 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1693 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1694 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1695 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1696 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1697 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1698
1699 /* Fill out the OS statistics structure */
1700
0cdc0369
AK		 1701 netdev->stats.rx_packets = adapter->stats.gprcl;
1702 netdev->stats.tx_packets = adapter->stats.gptcl;
1703 netdev->stats.rx_bytes = adapter->stats.gorcl;
1704 netdev->stats.tx_bytes = adapter->stats.gotcl;
1705 netdev->stats.multicast = adapter->stats.mprcl;
1706 netdev->stats.collisions = 0;
1da177e4
LT		 1707
1708 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1709 * with a length in the type/len field */
0cdc0369 1710 netdev->stats.rx_errors =
1da177e4
LT		 1711 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1712 adapter->stats.ruc +
1713 adapter->stats.roc /*+ adapter->stats.rlec */ +
1714 adapter->stats.icbc +
1715 adapter->stats.ecbc + adapter->stats.mpc;
1716
1da177e4 1717 /* see above
0cdc0369 1718 * netdev->stats.rx_length_errors = adapter->stats.rlec;
1da177e4
LT		 1719 */
1720
0cdc0369
AK		 1721 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
1722 netdev->stats.rx_fifo_errors = adapter->stats.mpc;
1723 netdev->stats.rx_missed_errors = adapter->stats.mpc;
1724 netdev->stats.rx_over_errors = adapter->stats.mpc;
1725
1726 netdev->stats.tx_errors = 0;
1727 netdev->stats.rx_frame_errors = 0;
1728 netdev->stats.tx_aborted_errors = 0;
1729 netdev->stats.tx_carrier_errors = 0;
1730 netdev->stats.tx_fifo_errors = 0;
1731 netdev->stats.tx_heartbeat_errors = 0;
1732 netdev->stats.tx_window_errors = 0;
1da177e4
LT		 1733}
1734
1735#define IXGB_MAX_INTR 10
1736/**
1737 * ixgb_intr - Interrupt Handler
1738 * @irq: interrupt number
1739 * @data: pointer to a network interface device structure
1da177e4
LT		 1740 **/
1741
1742static irqreturn_t
7d12e780 1743ixgb_intr(int irq, void *data)
1da177e4
LT		 1744{
1745 struct net_device *netdev = data;
8908c6cd 1746 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1747 struct ixgb_hw *hw = &adapter->hw;
222441a6 1748 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4 1749
03f83041 1750 if (unlikely(!icr))
1da177e4
LT		 1751 return IRQ_NONE; /* Not our interrupt */
1752
bab2bce7
JB		 1753 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1754 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1755 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4 1756
288379f0 1757 if (napi_schedule_prep(&adapter->napi)) {
1da177e4 1758
0060c072 1759 /* Disable interrupts and register for poll. The flush
1da177e4
LT		 1760 of the posted write is intentionally left out.
1761 */
1762
1da177e4 1763 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
288379f0 1764 __napi_schedule(&adapter->napi);
1da177e4 1765 }
1da177e4
LT		 1766 return IRQ_HANDLED;
1767}
1768
1da177e4
LT		 1769/**
1770 * ixgb_clean - NAPI Rx polling callback
1771 * @adapter: board private structure
1772 **/
1773
1774static int
bea3348e 1775ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1776{
bea3348e 1777 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1da177e4
LT		 1778 int work_done = 0;
1779
53e52c72 1780 ixgb_clean_tx_irq(adapter);
bea3348e 1781 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1782
53e52c72
DM		 1783 /* If budget not fully consumed, exit the polling mode */
1784 if (work_done < budget) {
288379f0 1785 napi_complete(napi);
72ab5195
JB		 1786 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1787 ixgb_irq_enable(adapter);
1da177e4
LT		 1788 }
1789
bea3348e 1790 return work_done;
1da177e4 1791}
1da177e4
LT		 1792
1793/**
1794 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1795 * @adapter: board private structure
1796 **/
1797
446490ca 1798static bool
1da177e4
LT		 1799ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1800{
1801 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1802 struct net_device *netdev = adapter->netdev;
1803 struct ixgb_tx_desc *tx_desc, *eop_desc;
1804 struct ixgb_buffer *buffer_info;
1805 unsigned int i, eop;
446490ca 1806 bool cleaned = false;
1da177e4
LT		 1807
1808 i = tx_ring->next_to_clean;
1809 eop = tx_ring->buffer_info[i].next_to_watch;
1810 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1811
9a432992 1812 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1813
446490ca 1814 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1815 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1816 buffer_info = &tx_ring->buffer_info[i];
1817
0060c072
JB		 1818 if (tx_desc->popts &
1819 (IXGB_TX_DESC_POPTS_TXSM |
1820 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1821 adapter->hw_csum_tx_good++;
1822
1823 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1824
222441a6 1825 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1826
1827 cleaned = (i == eop);
03f83041 1828 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1829 }
1830
1831 eop = tx_ring->buffer_info[i].next_to_watch;
1832 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1833 }
1834
1835 tx_ring->next_to_clean = i;
1836
0f8ecbad
JB		 1837 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1838 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1839 /* Make sure that anybody stopping the queue after this
1840 * sees the new next_to_clean. */
1841 smp_mb();
1842
1843 if (netif_queue_stopped(netdev) &&
1844 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1845 netif_wake_queue(netdev);
0f8ecbad
JB		 1846 ++adapter->restart_queue;
1847 }
1da177e4 1848 }
1da177e4 1849
03f83041 1850 if (adapter->detect_tx_hung) {
1da177e4
LT		 1851 /* detect a transmit hang in hardware, this serializes the
1852 * check with the clearing of time_stamp and movement of i */
446490ca 1853 adapter->detect_tx_hung = false;
fe52eeb8 1854 if (tx_ring->buffer_info[eop].time_stamp &&
9b8118df 1855 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1856 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1857 IXGB_STATUS_TXOFF)) {
1858 /* detected Tx unit hang */
6909c66d
JP		 1859 netif_err(adapter, drv, adapter->netdev,
1860 "Detected Tx Unit Hang\n"
1861 " TDH <%x>\n"
1862 " TDT <%x>\n"
1863 " next_to_use <%x>\n"
1864 " next_to_clean <%x>\n"
1865 "buffer_info[next_to_clean]\n"
1866 " time_stamp <%lx>\n"
1867 " next_to_watch <%x>\n"
1868 " jiffies <%lx>\n"
1869 " next_to_watch.status <%x>\n",
1870 IXGB_READ_REG(&adapter->hw, TDH),
1871 IXGB_READ_REG(&adapter->hw, TDT),
1872 tx_ring->next_to_use,
1873 tx_ring->next_to_clean,
1874 tx_ring->buffer_info[eop].time_stamp,
1875 eop,
1876 jiffies,
1877 eop_desc->status);
1da177e4 1878 netif_stop_queue(netdev);
9b8118df 1879 }
1da177e4
LT		 1880 }
1881
1882 return cleaned;
1883}
1884
1885/**
1886 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1887 * @adapter: board private structure
1888 * @rx_desc: receive descriptor
1889 * @sk_buff: socket buffer with received data
1890 **/
1891
235949d1 1892static void
1da177e4 1893ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1894 struct ixgb_rx_desc *rx_desc,
1895 struct sk_buff *skb)
1da177e4
LT		 1896{
1897 /* Ignore Checksum bit is set OR
1898 * TCP Checksum has not been calculated
1899 */
03f83041 1900 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4
LT		 1901 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1902 skb->ip_summed = CHECKSUM_NONE;
1903 return;
1904 }
1905
1906 /* At this point we know the hardware did the TCP checksum */
1907 /* now look at the TCP checksum error bit */
03f83041 1908 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4
LT		 1909 /* let the stack verify checksum errors */
1910 skb->ip_summed = CHECKSUM_NONE;
1911 adapter->hw_csum_rx_error++;
1912 } else {
1913 /* TCP checksum is good */
1914 skb->ip_summed = CHECKSUM_UNNECESSARY;
1915 adapter->hw_csum_rx_good++;
1916 }
1917}
1918
1919/**
1920 * ixgb_clean_rx_irq - Send received data up the network stack,
1921 * @adapter: board private structure
1922 **/
1923
446490ca 1924static bool
1da177e4 1925ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1da177e4
LT		 1926{
1927 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1928 struct net_device *netdev = adapter->netdev;
1929 struct pci_dev *pdev = adapter->pdev;
1930 struct ixgb_rx_desc *rx_desc, *next_rxd;
1931 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1932 u32 length;
1da177e4 1933 unsigned int i, j;
fc2d14e3 1934 int cleaned_count = 0;
446490ca 1935 bool cleaned = false;
1da177e4
LT		 1936
1937 i = rx_ring->next_to_clean;
1938 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1939 buffer_info = &rx_ring->buffer_info[i];
1940
9a432992 1941 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
fc2d14e3 1942 struct sk_buff *skb;
f404de1c 1943 u8 status;
1da177e4 1944
03f83041 1945 if (*work_done >= work_to_do)
1da177e4
LT		 1946 break;
1947
1948 (*work_done)++;
f404de1c 1949 status = rx_desc->status;
1da177e4 1950 skb = buffer_info->skb;
1dfdd7df 1951 buffer_info->skb = NULL;
f404de1c 1952
fc2d14e3 1953 prefetch(skb->data - NET_IP_ALIGN);
1da177e4 1954
03f83041 1955 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 1956 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1957 prefetch(next_rxd);
1958
03f83041 1959 if ((j = i + 1) == rx_ring->count) j = 0;
1da177e4
LT		 1960 next2_buffer = &rx_ring->buffer_info[j];
1961 prefetch(next2_buffer);
1962
1963 next_buffer = &rx_ring->buffer_info[i];
1da177e4 1964
446490ca 1965 cleaned = true;
fc2d14e3 1966 cleaned_count++;
1da177e4
LT		 1967
1968 pci_unmap_single(pdev,
1969 buffer_info->dma,
1970 buffer_info->length,
1971 PCI_DMA_FROMDEVICE);
fc2d14e3 1972 buffer_info->dma = 0;
1da177e4
LT		 1973
1974 length = le16_to_cpu(rx_desc->length);
fc2d14e3 1975 rx_desc->length = 0;
1da177e4 1976
03f83041 1977 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 1978
1979 /* All receives must fit into a single buffer */
1980
1981 IXGB_DBG("Receive packet consumed multiple buffers "
1982 "length<%x>\n", length);
1983
1984 dev_kfree_skb_irq(skb);
f404de1c 1985 goto rxdesc_done;
1da177e4
LT		 1986 }
1987
0060c072
JB		 1988 if (unlikely(rx_desc->errors &
1989 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
1990 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 1991 dev_kfree_skb_irq(skb);
f404de1c 1992 goto rxdesc_done;
1da177e4
LT		 1993 }
1994
6b900bb4
AK		 1995 /* code added for copybreak, this should improve
1996 * performance for small packets with large amounts
1997 * of reassembly being done in the stack */
d9fed18b 1998 if (length < copybreak) {
6b900bb4 1999 struct sk_buff *new_skb =
89d71a66 2000 netdev_alloc_skb_ip_align(netdev, length);
6b900bb4 2001 if (new_skb) {
27d7ff46
ACM		 2002 skb_copy_to_linear_data_offset(new_skb,
2003 -NET_IP_ALIGN,
2004 (skb->data -
2005 NET_IP_ALIGN),
2006 (length +
2007 NET_IP_ALIGN));
6b900bb4
AK		 2008 /* save the skb in buffer_info as good */
2009 buffer_info->skb = skb;
2010 skb = new_skb;
2011 }
2012 }
2013 /* end copybreak code */
2014
1da177e4
LT		 2015 /* Good Receive */
2016 skb_put(skb, length);
2017
2018 /* Receive Checksum Offload */
2019 ixgb_rx_checksum(adapter, rx_desc, skb);
2020
2021 skb->protocol = eth_type_trans(skb, netdev);
03f83041 2022 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2023 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
0060c072 2024 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2025 } else {
2026 netif_receive_skb(skb);
2027 }
1da177e4 2028
f404de1c
MC		 2029rxdesc_done:
2030 /* clean up descriptor, might be written over by hw */
1da177e4 2031 rx_desc->status = 0;
1da177e4 2032
fc2d14e3
JB		 2033 /* return some buffers to hardware, one at a time is too slow */
2034 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
2035 ixgb_alloc_rx_buffers(adapter, cleaned_count);
2036 cleaned_count = 0;
2037 }
2038
f404de1c 2039 /* use prefetched values */
1da177e4
LT		 2040 rx_desc = next_rxd;
2041 buffer_info = next_buffer;
2042 }
2043
2044 rx_ring->next_to_clean = i;
2045
fc2d14e3
JB		 2046 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2047 if (cleaned_count)
2048 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1da177e4
LT		 2049
2050 return cleaned;
2051}
2052
2053/**
2054 * ixgb_alloc_rx_buffers - Replace used receive buffers
2055 * @adapter: address of board private structure
2056 **/
2057
2058static void
fc2d14e3 2059ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
1da177e4
LT		 2060{
2061 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2062 struct net_device *netdev = adapter->netdev;
2063 struct pci_dev *pdev = adapter->pdev;
2064 struct ixgb_rx_desc *rx_desc;
2065 struct ixgb_buffer *buffer_info;
2066 struct sk_buff *skb;
2067 unsigned int i;
1da177e4
LT		 2068 long cleancount;
2069
2070 i = rx_ring->next_to_use;
2071 buffer_info = &rx_ring->buffer_info[i];
2072 cleancount = IXGB_DESC_UNUSED(rx_ring);
2073
1da177e4 2074
41639fed 2075 /* leave three descriptors unused */
fc2d14e3 2076 while (--cleancount > 2 && cleaned_count--) {
1dfdd7df 2077 /* recycle! its good for you */
69c7a940
AK		 2078 skb = buffer_info->skb;
2079 if (skb) {
1dfdd7df
AK		 2080 skb_trim(skb, 0);
2081 goto map_skb;
2082 }
1da177e4 2083
89d71a66 2084 skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
1dfdd7df 2085 if (unlikely(!skb)) {
1da177e4 2086 /* Better luck next round */
1dfdd7df 2087 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2088 break;
2089 }
2090
1da177e4
LT		 2091 buffer_info->skb = skb;
2092 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df
AK		 2093map_skb:
2094 buffer_info->dma = pci_map_single(pdev,
2095 skb->data,
2096 adapter->rx_buffer_len,
2097 PCI_DMA_FROMDEVICE);
1da177e4 2098
1dfdd7df 2099 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2100 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2101 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2102 * this is the rest of the workaround for h/w double
41639fed
MC		 2103 * writeback. */
2104 rx_desc->status = 0;
1da177e4 2105
1da177e4 2106
03f83041 2107 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2108 buffer_info = &rx_ring->buffer_info[i];
2109 }
2110
1dfdd7df
AK		 2111 if (likely(rx_ring->next_to_use != i)) {
2112 rx_ring->next_to_use = i;
2113 if (unlikely(i-- == 0))
2114 i = (rx_ring->count - 1);
2115
2116 /* Force memory writes to complete before letting h/w
2117 * know there are new descriptors to fetch. (Only
2118 * applicable for weak-ordered memory model archs, such
2119 * as IA-64). */
2120 wmb();
2121 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2122 }
1da177e4
LT		 2123}
2124
2125/**
2126 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
0060c072 2127 *
1da177e4
LT		 2128 * @param netdev network interface device structure
2129 * @param grp indicates to enable or disable tagging/stripping
2130 **/
2131static void
2132ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2133{
8908c6cd 2134 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2135 u32 ctrl, rctl;
1da177e4
LT		 2136
2137 ixgb_irq_disable(adapter);
2138 adapter->vlgrp = grp;
2139
03f83041 2140 if (grp) {
1da177e4
LT		 2141 /* enable VLAN tag insert/strip */
2142 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2143 ctrl |= IXGB_CTRL0_VME;
2144 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2145
2146 /* enable VLAN receive filtering */
2147
2148 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
1da177e4
LT		 2149 rctl &= ~IXGB_RCTL_CFIEN;
2150 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2151 } else {
2152 /* disable VLAN tag insert/strip */
2153
2154 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2155 ctrl &= ~IXGB_CTRL0_VME;
2156 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
1da177e4
LT		 2157 }
2158
bab2bce7
JB		 2159 /* don't enable interrupts unless we are UP */
2160 if (adapter->netdev->flags & IFF_UP)
2161 ixgb_irq_enable(adapter);
1da177e4
LT		 2162}
2163
2164static void
222441a6 2165ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2166{
8908c6cd 2167 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2168 u32 vfta, index;
1da177e4
LT		 2169
2170 /* add VID to filter table */
2171
2172 index = (vid >> 5) & 0x7F;
2173 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2174 vfta |= (1 << (vid & 0x1F));
2175 ixgb_write_vfta(&adapter->hw, index, vfta);
2176}
2177
2178static void
222441a6 2179ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2180{
8908c6cd 2181 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2182 u32 vfta, index;
1da177e4
LT		 2183
2184 ixgb_irq_disable(adapter);
2185
5c15bdec 2186 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 2187
bab2bce7
JB		 2188 /* don't enable interrupts unless we are UP */
2189 if (adapter->netdev->flags & IFF_UP)
2190 ixgb_irq_enable(adapter);
1da177e4 2191
bab2bce7 2192 /* remove VID from filter table */
1da177e4
LT		 2193
2194 index = (vid >> 5) & 0x7F;
2195 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2196 vfta &= ~(1 << (vid & 0x1F));
2197 ixgb_write_vfta(&adapter->hw, index, vfta);
2198}
2199
2200static void
2201ixgb_restore_vlan(struct ixgb_adapter *adapter)
2202{
2203 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2204
03f83041 2205 if (adapter->vlgrp) {
222441a6 2206 u16 vid;
1459336d 2207 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
03f83041 2208 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2209 continue;
2210 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2211 }
2212 }
2213}
2214
1da177e4
LT		 2215#ifdef CONFIG_NET_POLL_CONTROLLER
2216/*
2217 * Polling 'interrupt' - used by things like netconsole to send skbs
2218 * without having to re-enable interrupts. It's not called while
2219 * the interrupt routine is executing.
2220 */
2221
2222static void ixgb_netpoll(struct net_device *dev)
2223{
f990b426 2224 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2225
1da177e4 2226 disable_irq(adapter->pdev->irq);
7d12e780 2227 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2228 enable_irq(adapter->pdev->irq);
2229}
2230#endif
2231
01748fbb
LV		 2232/**
2233 * ixgb_io_error_detected() - called when PCI error is detected
2234 * @pdev pointer to pci device with error
2235 * @state pci channel state after error
2236 *
2237 * This callback is called by the PCI subsystem whenever
2238 * a PCI bus error is detected.
2239 */
0060c072
JB		 2240static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2241 enum pci_channel_state state)
01748fbb
LV		 2242{
2243 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2244 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2245
d6a1f83b
DN		 2246 netif_device_detach(netdev);
2247
2248 if (state == pci_channel_io_perm_failure)
2249 return PCI_ERS_RESULT_DISCONNECT;
2250
03f83041 2251 if (netif_running(netdev))
446490ca 2252 ixgb_down(adapter, true);
01748fbb
LV		 2253
2254 pci_disable_device(pdev);
2255
2256 /* Request a slot reset. */
2257 return PCI_ERS_RESULT_NEED_RESET;
2258}
2259
2260/**
2261 * ixgb_io_slot_reset - called after the pci bus has been reset.
2262 * @pdev pointer to pci device with error
2263 *
52035bdb 2264 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2265 * Basically, this tries to restart the card from scratch.
2266 * This is a shortened version of the device probe/discovery code,
2267 * it resembles the first-half of the ixgb_probe() routine.
2268 */
0060c072 2269static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2270{
2271 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2272 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2273
03f83041 2274 if (pci_enable_device(pdev)) {
6909c66d
JP		 2275 netif_err(adapter, probe, adapter->netdev,
2276 "Cannot re-enable PCI device after reset\n");
01748fbb
LV		 2277 return PCI_ERS_RESULT_DISCONNECT;
2278 }
2279
2280 /* Perform card reset only on one instance of the card */
2281 if (0 != PCI_FUNC (pdev->devfn))
2282 return PCI_ERS_RESULT_RECOVERED;
2283
2284 pci_set_master(pdev);
2285
2286 netif_carrier_off(netdev);
2287 netif_stop_queue(netdev);
2288 ixgb_reset(adapter);
2289
2290 /* Make sure the EEPROM is good */
03f83041 2291 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
6909c66d
JP		 2292 netif_err(adapter, probe, adapter->netdev,
2293 "After reset, the EEPROM checksum is not valid\n");
01748fbb
LV		 2294 return PCI_ERS_RESULT_DISCONNECT;
2295 }
2296 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2297 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2298
03f83041 2299 if (!is_valid_ether_addr(netdev->perm_addr)) {
6909c66d
JP		 2300 netif_err(adapter, probe, adapter->netdev,
2301 "After reset, invalid MAC address\n");
01748fbb
LV		 2302 return PCI_ERS_RESULT_DISCONNECT;
2303 }
2304
2305 return PCI_ERS_RESULT_RECOVERED;
2306}
2307
2308/**
2309 * ixgb_io_resume - called when its OK to resume normal operations
2310 * @pdev pointer to pci device with error
2311 *
2312 * The error recovery driver tells us that its OK to resume
2313 * normal operation. Implementation resembles the second-half
2314 * of the ixgb_probe() routine.
2315 */
0060c072 2316static void ixgb_io_resume(struct pci_dev *pdev)
01748fbb
LV		 2317{
2318 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2319 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2320
2321 pci_set_master(pdev);
2322
03f83041
JB		 2323 if (netif_running(netdev)) {
2324 if (ixgb_up(adapter)) {
01748fbb
LV		 2325 printk ("ixgb: can't bring device back up after reset\n");
2326 return;
2327 }
2328 }
2329
2330 netif_device_attach(netdev);
2331 mod_timer(&adapter->watchdog_timer, jiffies);
2332}
2333
1da177e4 2334/* ixgb_main.c */
Clone of davem's net-next-2.6 tree