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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / ixgb / ixgb_main.c
CommitLineData
1da177e4
LT		 1/*******************************************************************************
2
0abb6eb1 3 Intel PRO/10GbE Linux driver
f731a9ef 4 Copyright(c) 1999 - 2008 Intel Corporation.
0abb6eb1
AK		 5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
1da177e4 13 more details.
0abb6eb1 14
1da177e4 15 You should have received a copy of the GNU General Public License along with
0abb6eb1
AK		 16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
1da177e4
LT		 22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
0abb6eb1 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
1da177e4
LT		 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
29#include "ixgb.h"
30
1da177e4 31char ixgb_driver_name[] = "ixgb";
e9ab1d14 32static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
1da177e4 33
1da177e4 34#define DRIVERNAPI "-NAPI"
f731a9ef 35#define DRV_VERSION "1.0.135-k2" DRIVERNAPI
273dc74e 36const char ixgb_driver_version[] = DRV_VERSION;
f731a9ef 37static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation.";
1da177e4 38
d9fed18b
JB		 39#define IXGB_CB_LENGTH 256
40static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
41module_param(copybreak, uint, 0644);
42MODULE_PARM_DESC(copybreak,
43 "Maximum size of packet that is copied to a new buffer on receive");
44
1da177e4
LT		 45/* ixgb_pci_tbl - PCI Device ID Table
46 *
47 * Wildcard entries (PCI_ANY_ID) should come last
48 * Last entry must be all 0s
49 *
50 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
51 * Class, Class Mask, private data (not used) }
52 */
53static struct pci_device_id ixgb_pci_tbl[] = {
54 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
55 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
940829e2
AK		 56 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
57 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1da177e4
LT		 58 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
59 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
7490d71a 60 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
1da177e4
LT		 61 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
62
63 /* required last entry */
64 {0,}
65};
66
67MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
68
69/* Local Function Prototypes */
1da177e4
LT		 70static int ixgb_init_module(void);
71static void ixgb_exit_module(void);
72static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
73static void __devexit ixgb_remove(struct pci_dev *pdev);
74static int ixgb_sw_init(struct ixgb_adapter *adapter);
75static int ixgb_open(struct net_device *netdev);
76static int ixgb_close(struct net_device *netdev);
77static void ixgb_configure_tx(struct ixgb_adapter *adapter);
78static void ixgb_configure_rx(struct ixgb_adapter *adapter);
79static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
80static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
81static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
82static void ixgb_set_multi(struct net_device *netdev);
83static void ixgb_watchdog(unsigned long data);
84static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
85static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
86static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
87static int ixgb_set_mac(struct net_device *netdev, void *p);
7d12e780 88static irqreturn_t ixgb_intr(int irq, void *data);
446490ca 89static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
ac79c82e 90
7490d71a
JB		 91static int ixgb_clean(struct napi_struct *, int);
92static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
fc2d14e3 93static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);
7490d71a 94
1da177e4 95static void ixgb_tx_timeout(struct net_device *dev);
c4028958 96static void ixgb_tx_timeout_task(struct work_struct *work);
7490d71a 97
1da177e4 98static void ixgb_vlan_rx_register(struct net_device *netdev,
7490d71a 99 struct vlan_group *grp);
222441a6
JP		 100static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
101static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
1da177e4
LT		 102static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
103
1da177e4
LT		 104#ifdef CONFIG_NET_POLL_CONTROLLER
105/* for netdump / net console */
106static void ixgb_netpoll(struct net_device *dev);
107#endif
108
01748fbb 109static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
7490d71a 110 enum pci_channel_state state);
01748fbb
LV		 111static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
112static void ixgb_io_resume (struct pci_dev *pdev);
1da177e4 113
01748fbb
LV		 114static struct pci_error_handlers ixgb_err_handler = {
115 .error_detected = ixgb_io_error_detected,
116 .slot_reset = ixgb_io_slot_reset,
117 .resume = ixgb_io_resume,
118};
119
1da177e4 120static struct pci_driver ixgb_driver = {
c2eba932 121 .name = ixgb_driver_name,
1da177e4 122 .id_table = ixgb_pci_tbl,
c2eba932
MC		 123 .probe = ixgb_probe,
124 .remove = __devexit_p(ixgb_remove),
01748fbb 125 .err_handler = &ixgb_err_handler
1da177e4
LT		 126};
127
128MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
129MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
130MODULE_LICENSE("GPL");
01e5abc2 131MODULE_VERSION(DRV_VERSION);
1da177e4 132
ec9c3f5d
AK		 133#define DEFAULT_DEBUG_LEVEL_SHIFT 3
134static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
135module_param(debug, int, 0);
136MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
137
1da177e4
LT		 138/**
139 * ixgb_init_module - Driver Registration Routine
140 *
141 * ixgb_init_module is the first routine called when the driver is
142 * loaded. All it does is register with the PCI subsystem.
143 **/
144
145static int __init
146ixgb_init_module(void)
147{
1da177e4
LT		 148 printk(KERN_INFO "%s - version %s\n",
149 ixgb_driver_string, ixgb_driver_version);
150
151 printk(KERN_INFO "%s\n", ixgb_copyright);
152
29917620 153 return pci_register_driver(&ixgb_driver);
1da177e4
LT		 154}
155
156module_init(ixgb_init_module);
157
158/**
159 * ixgb_exit_module - Driver Exit Cleanup Routine
160 *
161 * ixgb_exit_module is called just before the driver is removed
162 * from memory.
163 **/
164
165static void __exit
166ixgb_exit_module(void)
167{
1da177e4
LT		 168 pci_unregister_driver(&ixgb_driver);
169}
170
171module_exit(ixgb_exit_module);
172
173/**
174 * ixgb_irq_disable - Mask off interrupt generation on the NIC
175 * @adapter: board private structure
176 **/
177
235949d1 178static void
1da177e4
LT		 179ixgb_irq_disable(struct ixgb_adapter *adapter)
180{
1da177e4
LT		 181 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
182 IXGB_WRITE_FLUSH(&adapter->hw);
183 synchronize_irq(adapter->pdev->irq);
184}
185
186/**
187 * ixgb_irq_enable - Enable default interrupt generation settings
188 * @adapter: board private structure
189 **/
190
235949d1 191static void
1da177e4
LT		 192ixgb_irq_enable(struct ixgb_adapter *adapter)
193{
9c61a9dc
JB		 194 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
195 IXGB_INT_TXDW | IXGB_INT_LSC;
196 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
197 val |= IXGB_INT_GPI0;
198 IXGB_WRITE_REG(&adapter->hw, IMS, val);
199 IXGB_WRITE_FLUSH(&adapter->hw);
1da177e4
LT		 200}
201
202int
203ixgb_up(struct ixgb_adapter *adapter)
204{
205 struct net_device *netdev = adapter->netdev;
fb136c07 206 int err, irq_flags = IRQF_SHARED;
1da177e4
LT		 207 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
208 struct ixgb_hw *hw = &adapter->hw;
209
210 /* hardware has been reset, we need to reload some things */
211
8556f0d1 212 ixgb_rar_set(hw, netdev->dev_addr, 0);
1da177e4
LT		 213 ixgb_set_multi(netdev);
214
215 ixgb_restore_vlan(adapter);
216
217 ixgb_configure_tx(adapter);
218 ixgb_setup_rctl(adapter);
219 ixgb_configure_rx(adapter);
fc2d14e3 220 ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));
1da177e4 221
e59d1696
AK		 222 /* disable interrupts and get the hardware into a known state */
223 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
224
fb136c07
AK		 225 /* only enable MSI if bus is in PCI-X mode */
226 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
227 err = pci_enable_msi(adapter->pdev);
228 if (!err) {
229 adapter->have_msi = 1;
230 irq_flags = 0;
231 }
1da177e4
LT		 232 /* proceed to try to request regular interrupt */
233 }
1da177e4 234
fb136c07
AK		 235 err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
236 netdev->name, netdev);
237 if (err) {
238 if (adapter->have_msi)
239 pci_disable_msi(adapter->pdev);
ec9c3f5d
AK		 240 DPRINTK(PROBE, ERR,
241 "Unable to allocate interrupt Error: %d\n", err);
1da177e4 242 return err;
ec9c3f5d 243 }
1da177e4 244
03f83041 245 if ((hw->max_frame_size != max_frame) ||
1da177e4
LT		 246 (hw->max_frame_size !=
247 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
248
249 hw->max_frame_size = max_frame;
250
251 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
252
03f83041 253 if (hw->max_frame_size >
1da177e4 254 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
222441a6 255 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
1da177e4 256
03f83041 257 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
1da177e4
LT		 258 ctrl0 |= IXGB_CTRL0_JFE;
259 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
260 }
261 }
262 }
263
bab2bce7 264 clear_bit(__IXGB_DOWN, &adapter->flags);
1da177e4 265
bea3348e 266 napi_enable(&adapter->napi);
e59d1696
AK		 267 ixgb_irq_enable(adapter);
268
bab2bce7
JB		 269 mod_timer(&adapter->watchdog_timer, jiffies);
270
1da177e4
LT		 271 return 0;
272}
273
274void
446490ca 275ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
1da177e4
LT		 276{
277 struct net_device *netdev = adapter->netdev;
278
bab2bce7
JB		 279 /* prevent the interrupt handler from restarting watchdog */
280 set_bit(__IXGB_DOWN, &adapter->flags);
281
49d85c50 282 napi_disable(&adapter->napi);
bab2bce7 283 /* waiting for NAPI to complete can re-enable interrupts */
1da177e4
LT		 284 ixgb_irq_disable(adapter);
285 free_irq(adapter->pdev->irq, netdev);
fb136c07
AK		 286
287 if (adapter->have_msi)
1da177e4
LT		 288 pci_disable_msi(adapter->pdev);
289
03f83041 290 if (kill_watchdog)
1da177e4 291 del_timer_sync(&adapter->watchdog_timer);
49d85c50 292
1da177e4
LT		 293 adapter->link_speed = 0;
294 adapter->link_duplex = 0;
295 netif_carrier_off(netdev);
296 netif_stop_queue(netdev);
297
298 ixgb_reset(adapter);
299 ixgb_clean_tx_ring(adapter);
300 ixgb_clean_rx_ring(adapter);
301}
302
303void
304ixgb_reset(struct ixgb_adapter *adapter)
305{
3fd7131f 306 struct ixgb_hw *hw = &adapter->hw;
1da177e4 307
3fd7131f
MW		 308 ixgb_adapter_stop(hw);
309 if (!ixgb_init_hw(hw))
ec9c3f5d 310 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
3fd7131f
MW		 311
312 /* restore frame size information */
313 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
314 if (hw->max_frame_size >
315 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
316 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
317 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
318 ctrl0 |= IXGB_CTRL0_JFE;
319 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
320 }
321 }
1da177e4
LT		 322}
323
0edc3527
SH		 324static const struct net_device_ops ixgb_netdev_ops = {
325 .ndo_open = ixgb_open,
326 .ndo_stop = ixgb_close,
327 .ndo_get_stats = ixgb_get_stats,
328 .ndo_set_multicast_list = ixgb_set_multi,
329 .ndo_validate_addr = eth_validate_addr,
330 .ndo_set_mac_address = ixgb_set_mac,
331 .ndo_change_mtu = ixgb_change_mtu,
332 .ndo_tx_timeout = ixgb_tx_timeout,
333 .ndo_vlan_rx_register = ixgb_vlan_rx_register,
334 .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid,
335 .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid,
336#ifdef CONFIG_NET_POLL_CONTROLLER
337 .ndo_poll_controller = ixgb_netpoll,
338#endif
339};
340
1da177e4
LT		 341/**
342 * ixgb_probe - Device Initialization Routine
343 * @pdev: PCI device information struct
344 * @ent: entry in ixgb_pci_tbl
345 *
346 * Returns 0 on success, negative on failure
347 *
348 * ixgb_probe initializes an adapter identified by a pci_dev structure.
349 * The OS initialization, configuring of the adapter private structure,
350 * and a hardware reset occur.
351 **/
352
353static int __devinit
0060c072 354ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 355{
356 struct net_device *netdev = NULL;
357 struct ixgb_adapter *adapter;
358 static int cards_found = 0;
1da177e4
LT		 359 int pci_using_dac;
360 int i;
361 int err;
362
9e7bd330
JB		 363 err = pci_enable_device(pdev);
364 if (err)
1da177e4
LT		 365 return err;
366
03f83041 367 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
9e7bd330 368 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
1da177e4
LT		 369 pci_using_dac = 1;
370 } else {
03f83041 371 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
9e7bd330 372 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
ec9c3f5d
AK		 373 printk(KERN_ERR
374 "ixgb: No usable DMA configuration, aborting\n");
c91e468a 375 goto err_dma_mask;
1da177e4
LT		 376 }
377 pci_using_dac = 0;
378 }
379
9e7bd330
JB		 380 err = pci_request_regions(pdev, ixgb_driver_name);
381 if (err)
c91e468a 382 goto err_request_regions;
1da177e4
LT		 383
384 pci_set_master(pdev);
385
386 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
03f83041 387 if (!netdev) {
1da177e4
LT		 388 err = -ENOMEM;
389 goto err_alloc_etherdev;
390 }
391
1da177e4
LT		 392 SET_NETDEV_DEV(netdev, &pdev->dev);
393
394 pci_set_drvdata(pdev, netdev);
8908c6cd 395 adapter = netdev_priv(netdev);
1da177e4
LT		 396 adapter->netdev = netdev;
397 adapter->pdev = pdev;
398 adapter->hw.back = adapter;
ec9c3f5d 399 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
1da177e4 400
275f165f 401 adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
e539e466 402 if (!adapter->hw.hw_addr) {
1da177e4
LT		 403 err = -EIO;
404 goto err_ioremap;
405 }
406
1459336d 407 for (i = BAR_1; i <= BAR_5; i++) {
03f83041 408 if (pci_resource_len(pdev, i) == 0)
1da177e4 409 continue;
03f83041 410 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 411 adapter->hw.io_base = pci_resource_start(pdev, i);
412 break;
413 }
414 }
415
0edc3527 416 netdev->netdev_ops = &ixgb_netdev_ops;
1da177e4 417 netdev->hard_start_xmit = &ixgb_xmit_frame;
1da177e4 418 ixgb_set_ethtool_ops(netdev);
9b8118df 419 netdev->watchdog_timeo = 5 * HZ;
bea3348e 420 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4 421
0eb5a34c 422 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 423
424 adapter->bd_number = cards_found;
425 adapter->link_speed = 0;
426 adapter->link_duplex = 0;
427
428 /* setup the private structure */
429
9e7bd330
JB		 430 err = ixgb_sw_init(adapter);
431 if (err)
1da177e4
LT		 432 goto err_sw_init;
433
434 netdev->features = NETIF_F_SG |
435 NETIF_F_HW_CSUM |
436 NETIF_F_HW_VLAN_TX |
437 NETIF_F_HW_VLAN_RX |
438 NETIF_F_HW_VLAN_FILTER;
1da177e4 439 netdev->features |= NETIF_F_TSO;
1da177e4 440
03f83041 441 if (pci_using_dac)
1da177e4
LT		 442 netdev->features |= NETIF_F_HIGHDMA;
443
444 /* make sure the EEPROM is good */
445
03f83041 446 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
ec9c3f5d 447 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 448 err = -EIO;
449 goto err_eeprom;
450 }
451
452 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
df859c51 453 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1da177e4 454
03f83041 455 if (!is_valid_ether_addr(netdev->perm_addr)) {
ec9c3f5d 456 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1da177e4
LT		 457 err = -EIO;
458 goto err_eeprom;
459 }
460
461 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
462
463 init_timer(&adapter->watchdog_timer);
464 adapter->watchdog_timer.function = &ixgb_watchdog;
465 adapter->watchdog_timer.data = (unsigned long)adapter;
466
c4028958 467 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 468
ec9c3f5d 469 strcpy(netdev->name, "eth%d");
9e7bd330
JB		 470 err = register_netdev(netdev);
471 if (err)
1da177e4
LT		 472 goto err_register;
473
474 /* we're going to reset, so assume we have no link for now */
475
476 netif_carrier_off(netdev);
477 netif_stop_queue(netdev);
478
ec9c3f5d 479 DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
1da177e4
LT		 480 ixgb_check_options(adapter);
481 /* reset the hardware with the new settings */
482
483 ixgb_reset(adapter);
484
485 cards_found++;
486 return 0;
487
488err_register:
489err_sw_init:
490err_eeprom:
491 iounmap(adapter->hw.hw_addr);
492err_ioremap:
493 free_netdev(netdev);
494err_alloc_etherdev:
495 pci_release_regions(pdev);
c91e468a
AS		 496err_request_regions:
497err_dma_mask:
498 pci_disable_device(pdev);
1da177e4
LT		 499 return err;
500}
501
502/**
503 * ixgb_remove - Device Removal Routine
504 * @pdev: PCI device information struct
505 *
506 * ixgb_remove is called by the PCI subsystem to alert the driver
507 * that it should release a PCI device. The could be caused by a
508 * Hot-Plug event, or because the driver is going to be removed from
509 * memory.
510 **/
511
512static void __devexit
513ixgb_remove(struct pci_dev *pdev)
514{
515 struct net_device *netdev = pci_get_drvdata(pdev);
8908c6cd 516 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 517
12579697
JB		 518 flush_scheduled_work();
519
1da177e4
LT		 520 unregister_netdev(netdev);
521
522 iounmap(adapter->hw.hw_addr);
523 pci_release_regions(pdev);
524
525 free_netdev(netdev);
526}
527
528/**
529 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
530 * @adapter: board private structure to initialize
531 *
532 * ixgb_sw_init initializes the Adapter private data structure.
533 * Fields are initialized based on PCI device information and
534 * OS network device settings (MTU size).
535 **/
536
537static int __devinit
538ixgb_sw_init(struct ixgb_adapter *adapter)
539{
540 struct ixgb_hw *hw = &adapter->hw;
541 struct net_device *netdev = adapter->netdev;
542 struct pci_dev *pdev = adapter->pdev;
543
544 /* PCI config space info */
545
546 hw->vendor_id = pdev->vendor;
547 hw->device_id = pdev->device;
548 hw->subsystem_vendor_id = pdev->subsystem_vendor;
549 hw->subsystem_id = pdev->subsystem_device;
550
1da177e4 551 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
a3dc3da0 552 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
1da177e4 553
03f83041 554 if ((hw->device_id == IXGB_DEVICE_ID_82597EX)
940829e2
AK		 555 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
556 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
557 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
0060c072 558 hw->mac_type = ixgb_82597;
1da177e4
LT		 559 else {
560 /* should never have loaded on this device */
ec9c3f5d 561 DPRINTK(PROBE, ERR, "unsupported device id\n");
1da177e4
LT		 562 }
563
564 /* enable flow control to be programmed */
565 hw->fc.send_xon = 1;
566
bab2bce7 567 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 568 return 0;
569}
570
571/**
572 * ixgb_open - Called when a network interface is made active
573 * @netdev: network interface device structure
574 *
575 * Returns 0 on success, negative value on failure
576 *
577 * The open entry point is called when a network interface is made
578 * active by the system (IFF_UP). At this point all resources needed
579 * for transmit and receive operations are allocated, the interrupt
580 * handler is registered with the OS, the watchdog timer is started,
581 * and the stack is notified that the interface is ready.
582 **/
583
584static int
585ixgb_open(struct net_device *netdev)
586{
8908c6cd 587 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 588 int err;
589
590 /* allocate transmit descriptors */
9e7bd330
JB		 591 err = ixgb_setup_tx_resources(adapter);
592 if (err)
1da177e4
LT		 593 goto err_setup_tx;
594
595 /* allocate receive descriptors */
596
9e7bd330
JB		 597 err = ixgb_setup_rx_resources(adapter);
598 if (err)
1da177e4
LT		 599 goto err_setup_rx;
600
9e7bd330
JB		 601 err = ixgb_up(adapter);
602 if (err)
1da177e4
LT		 603 goto err_up;
604
605 return 0;
606
607err_up:
608 ixgb_free_rx_resources(adapter);
609err_setup_rx:
610 ixgb_free_tx_resources(adapter);
611err_setup_tx:
612 ixgb_reset(adapter);
613
614 return err;
615}
616
617/**
618 * ixgb_close - Disables a network interface
619 * @netdev: network interface device structure
620 *
621 * Returns 0, this is not allowed to fail
622 *
623 * The close entry point is called when an interface is de-activated
624 * by the OS. The hardware is still under the drivers control, but
625 * needs to be disabled. A global MAC reset is issued to stop the
626 * hardware, and all transmit and receive resources are freed.
627 **/
628
629static int
630ixgb_close(struct net_device *netdev)
631{
8908c6cd 632 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 633
446490ca 634 ixgb_down(adapter, true);
1da177e4
LT		 635
636 ixgb_free_tx_resources(adapter);
637 ixgb_free_rx_resources(adapter);
638
639 return 0;
640}
641
642/**
643 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
644 * @adapter: board private structure
645 *
646 * Return 0 on success, negative on failure
647 **/
648
649int
650ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
651{
652 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
653 struct pci_dev *pdev = adapter->pdev;
654 int size;
655
656 size = sizeof(struct ixgb_buffer) * txdr->count;
657 txdr->buffer_info = vmalloc(size);
03f83041 658 if (!txdr->buffer_info) {
ec9c3f5d
AK		 659 DPRINTK(PROBE, ERR,
660 "Unable to allocate transmit descriptor ring memory\n");
1da177e4
LT		 661 return -ENOMEM;
662 }
663 memset(txdr->buffer_info, 0, size);
664
665 /* round up to nearest 4K */
666
667 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 668 txdr->size = ALIGN(txdr->size, 4096);
1da177e4
LT		 669
670 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
03f83041 671 if (!txdr->desc) {
1da177e4 672 vfree(txdr->buffer_info);
ec9c3f5d
AK		 673 DPRINTK(PROBE, ERR,
674 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 675 return -ENOMEM;
676 }
677 memset(txdr->desc, 0, txdr->size);
678
679 txdr->next_to_use = 0;
680 txdr->next_to_clean = 0;
681
682 return 0;
683}
684
685/**
686 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
687 * @adapter: board private structure
688 *
689 * Configure the Tx unit of the MAC after a reset.
690 **/
691
692static void
693ixgb_configure_tx(struct ixgb_adapter *adapter)
694{
222441a6
JP		 695 u64 tdba = adapter->tx_ring.dma;
696 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
697 u32 tctl;
1da177e4
LT		 698 struct ixgb_hw *hw = &adapter->hw;
699
0060c072
JB		 700 /* Setup the Base and Length of the Tx Descriptor Ring
701 * tx_ring.dma can be either a 32 or 64 bit value
1da177e4
LT		 702 */
703
704 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
705 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
706
707 IXGB_WRITE_REG(hw, TDLEN, tdlen);
708
709 /* Setup the HW Tx Head and Tail descriptor pointers */
710
711 IXGB_WRITE_REG(hw, TDH, 0);
712 IXGB_WRITE_REG(hw, TDT, 0);
713
714 /* don't set up txdctl, it induces performance problems if configured
715 * incorrectly */
716 /* Set the Tx Interrupt Delay register */
717
718 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
719
720 /* Program the Transmit Control Register */
721
722 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
723 IXGB_WRITE_REG(hw, TCTL, tctl);
724
725 /* Setup Transmit Descriptor Settings for this adapter */
726 adapter->tx_cmd_type =
0060c072
JB		 727 IXGB_TX_DESC_TYPE |
728 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
1da177e4
LT		 729}
730
731/**
732 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
733 * @adapter: board private structure
734 *
735 * Returns 0 on success, negative on failure
736 **/
737
738int
739ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
740{
741 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
742 struct pci_dev *pdev = adapter->pdev;
743 int size;
744
745 size = sizeof(struct ixgb_buffer) * rxdr->count;
746 rxdr->buffer_info = vmalloc(size);
03f83041 747 if (!rxdr->buffer_info) {
ec9c3f5d
AK		 748 DPRINTK(PROBE, ERR,
749 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 750 return -ENOMEM;
751 }
752 memset(rxdr->buffer_info, 0, size);
753
754 /* Round up to nearest 4K */
755
756 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 757 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4
LT		 758
759 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
760
03f83041 761 if (!rxdr->desc) {
1da177e4 762 vfree(rxdr->buffer_info);
ec9c3f5d
AK		 763 DPRINTK(PROBE, ERR,
764 "Unable to allocate receive descriptors\n");
1da177e4
LT		 765 return -ENOMEM;
766 }
767 memset(rxdr->desc, 0, rxdr->size);
768
769 rxdr->next_to_clean = 0;
770 rxdr->next_to_use = 0;
771
772 return 0;
773}
774
775/**
776 * ixgb_setup_rctl - configure the receive control register
777 * @adapter: Board private structure
778 **/
779
780static void
781ixgb_setup_rctl(struct ixgb_adapter *adapter)
782{
222441a6 783 u32 rctl;
1da177e4
LT		 784
785 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
786
787 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
788
789 rctl |=
0060c072
JB		 790 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
791 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
1da177e4
LT		 792 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
793
794 rctl |= IXGB_RCTL_SECRC;
795
3f3dc0dd 796 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 797 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 798 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 799 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 800 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 801 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 802 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 803 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 804
805 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
806}
807
808/**
809 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
810 * @adapter: board private structure
811 *
812 * Configure the Rx unit of the MAC after a reset.
813 **/
814
815static void
816ixgb_configure_rx(struct ixgb_adapter *adapter)
817{
222441a6
JP		 818 u64 rdba = adapter->rx_ring.dma;
819 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 820 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 821 u32 rctl;
822 u32 rxcsum;
1da177e4
LT		 823
824 /* make sure receives are disabled while setting up the descriptors */
825
826 rctl = IXGB_READ_REG(hw, RCTL);
827 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
828
829 /* set the Receive Delay Timer Register */
830
831 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
832
833 /* Setup the Base and Length of the Rx Descriptor Ring */
834
835 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
836 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
837
838 IXGB_WRITE_REG(hw, RDLEN, rdlen);
839
840 /* Setup the HW Rx Head and Tail Descriptor Pointers */
841 IXGB_WRITE_REG(hw, RDH, 0);
842 IXGB_WRITE_REG(hw, RDT, 0);
843
4360386f
JB		 844 /* due to the hardware errata with RXDCTL, we are unable to use any of
845 * the performance enhancing features of it without causing other
846 * subtle bugs, some of the bugs could include receive length
847 * corruption at high data rates (WTHRESH > 0) and/or receive
848 * descriptor ring irregularites (particularly in hardware cache) */
849 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 850
851 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 852 if (adapter->rx_csum) {
1da177e4
LT		 853 rxcsum = IXGB_READ_REG(hw, RXCSUM);
854 rxcsum |= IXGB_RXCSUM_TUOFL;
855 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
856 }
857
858 /* Enable Receives */
859
860 IXGB_WRITE_REG(hw, RCTL, rctl);
861}
862
863/**
864 * ixgb_free_tx_resources - Free Tx Resources
865 * @adapter: board private structure
866 *
867 * Free all transmit software resources
868 **/
869
870void
871ixgb_free_tx_resources(struct ixgb_adapter *adapter)
872{
873 struct pci_dev *pdev = adapter->pdev;
874
875 ixgb_clean_tx_ring(adapter);
876
877 vfree(adapter->tx_ring.buffer_info);
878 adapter->tx_ring.buffer_info = NULL;
879
880 pci_free_consistent(pdev, adapter->tx_ring.size,
881 adapter->tx_ring.desc, adapter->tx_ring.dma);
882
883 adapter->tx_ring.desc = NULL;
884}
885
235949d1 886static void
1da177e4 887ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
0060c072 888 struct ixgb_buffer *buffer_info)
1da177e4
LT		 889{
890 struct pci_dev *pdev = adapter->pdev;
1dfdd7df
AK		 891
892 if (buffer_info->dma)
893 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
894 PCI_DMA_TODEVICE);
895
c2199340
JB		 896 /* okay to call kfree_skb here instead of kfree_skb_any because
897 * this is never called in interrupt context */
1dfdd7df 898 if (buffer_info->skb)
c2199340 899 dev_kfree_skb(buffer_info->skb);
1dfdd7df
AK		 900
901 buffer_info->skb = NULL;
902 buffer_info->dma = 0;
903 buffer_info->time_stamp = 0;
904 /* these fields must always be initialized in tx
905 * buffer_info->length = 0;
906 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 907}
908
909/**
910 * ixgb_clean_tx_ring - Free Tx Buffers
911 * @adapter: board private structure
912 **/
913
914static void
915ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
916{
917 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
918 struct ixgb_buffer *buffer_info;
919 unsigned long size;
920 unsigned int i;
921
922 /* Free all the Tx ring sk_buffs */
923
1459336d 924 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 925 buffer_info = &tx_ring->buffer_info[i];
926 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
927 }
928
929 size = sizeof(struct ixgb_buffer) * tx_ring->count;
930 memset(tx_ring->buffer_info, 0, size);
931
932 /* Zero out the descriptor ring */
933
934 memset(tx_ring->desc, 0, tx_ring->size);
935
936 tx_ring->next_to_use = 0;
937 tx_ring->next_to_clean = 0;
938
939 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
940 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
941}
942
943/**
944 * ixgb_free_rx_resources - Free Rx Resources
945 * @adapter: board private structure
946 *
947 * Free all receive software resources
948 **/
949
950void
951ixgb_free_rx_resources(struct ixgb_adapter *adapter)
952{
953 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
954 struct pci_dev *pdev = adapter->pdev;
955
956 ixgb_clean_rx_ring(adapter);
957
958 vfree(rx_ring->buffer_info);
959 rx_ring->buffer_info = NULL;
960
961 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
962
963 rx_ring->desc = NULL;
964}
965
966/**
967 * ixgb_clean_rx_ring - Free Rx Buffers
968 * @adapter: board private structure
969 **/
970
971static void
972ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
973{
974 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
975 struct ixgb_buffer *buffer_info;
976 struct pci_dev *pdev = adapter->pdev;
977 unsigned long size;
978 unsigned int i;
979
980 /* Free all the Rx ring sk_buffs */
981
1459336d 982 for (i = 0; i < rx_ring->count; i++) {
1da177e4 983 buffer_info = &rx_ring->buffer_info[i];
23e55a32 984 if (buffer_info->dma) {
1da177e4
LT		 985 pci_unmap_single(pdev,
986 buffer_info->dma,
987 buffer_info->length,
988 PCI_DMA_FROMDEVICE);
23e55a32
BJ		 989 buffer_info->dma = 0;
990 buffer_info->length = 0;
991 }
1da177e4 992
23e55a32 993 if (buffer_info->skb) {
1da177e4 994 dev_kfree_skb(buffer_info->skb);
1da177e4
LT		 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);
746b9f02 1062 rctl &= ~IXGB_RCTL_VFE;
1da177e4 1063 } else {
746b9f02
PM		 1064 if (netdev->flags & IFF_ALLMULTI) {
1065 rctl |= IXGB_RCTL_MPE;
1066 rctl &= ~IXGB_RCTL_UPE;
1067 } else {
1068 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1069 }
78ed11a5 1070 rctl |= IXGB_RCTL_VFE;
1da177e4
LT		 1071 }
1072
03f83041 1073 if (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1074 rctl |= IXGB_RCTL_MPE;
1075 IXGB_WRITE_REG(hw, RCTL, rctl);
1076 } else {
222441a6 1077 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1078 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1079
1080 IXGB_WRITE_REG(hw, RCTL, rctl);
1081
0060c072
JB		 1082 for (i = 0, mc_ptr = netdev->mc_list;
1083 mc_ptr;
1084 i++, mc_ptr = mc_ptr->next)
1da177e4 1085 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
0060c072 1086 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1da177e4
LT		 1087
1088 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1089 }
1090}
1091
1092/**
1093 * ixgb_watchdog - Timer Call-back
1094 * @data: pointer to netdev cast into an unsigned long
1095 **/
1096
1097static void
1098ixgb_watchdog(unsigned long data)
1099{
1100 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1101 struct net_device *netdev = adapter->netdev;
1102 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1103
1104 ixgb_check_for_link(&adapter->hw);
1105
1106 if (ixgb_check_for_bad_link(&adapter->hw)) {
1107 /* force the reset path */
1108 netif_stop_queue(netdev);
1109 }
1110
03f83041
JB		 1111 if (adapter->hw.link_up) {
1112 if (!netif_carrier_ok(netdev)) {
ec9c3f5d
AK		 1113 DPRINTK(LINK, INFO,
1114 "NIC Link is Up 10000 Mbps Full Duplex\n");
1da177e4
LT		 1115 adapter->link_speed = 10000;
1116 adapter->link_duplex = FULL_DUPLEX;
1117 netif_carrier_on(netdev);
1118 netif_wake_queue(netdev);
1119 }
1120 } else {
03f83041 1121 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1122 adapter->link_speed = 0;
1123 adapter->link_duplex = 0;
ec9c3f5d 1124 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1da177e4
LT		 1125 netif_carrier_off(netdev);
1126 netif_stop_queue(netdev);
1127
1128 }
1129 }
1130
1131 ixgb_update_stats(adapter);
1132
03f83041
JB		 1133 if (!netif_carrier_ok(netdev)) {
1134 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1135 /* We've lost link, so the controller stops DMA,
1136 * but we've got queued Tx work that's never going
1137 * to get done, so reset controller to flush Tx.
1138 * (Do the reset outside of interrupt context). */
1139 schedule_work(&adapter->tx_timeout_task);
1140 }
1141 }
1142
1143 /* Force detection of hung controller every watchdog period */
446490ca 1144 adapter->detect_tx_hung = true;
1da177e4
LT		 1145
1146 /* generate an interrupt to force clean up of any stragglers */
1147 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1148
1149 /* Reset the timer */
1150 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1151}
1152
1153#define IXGB_TX_FLAGS_CSUM 0x00000001
1154#define IXGB_TX_FLAGS_VLAN 0x00000002
1155#define IXGB_TX_FLAGS_TSO 0x00000004
1156
235949d1 1157static int
1da177e4
LT		 1158ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1159{
1da177e4
LT		 1160 struct ixgb_context_desc *context_desc;
1161 unsigned int i;
222441a6
JP		 1162 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1163 u16 ipcse, tucse, mss;
1da177e4
LT		 1164 int err;
1165
89114afd 1166 if (likely(skb_is_gso(skb))) {
adc54139 1167 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1168 struct iphdr *iph;
1169
1da177e4
LT		 1170 if (skb_header_cloned(skb)) {
1171 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1172 if (err)
1173 return err;
1174 }
1175
ab6a5bb6 1176 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1177 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1178 iph = ip_hdr(skb);
1179 iph->tot_len = 0;
1180 iph->check = 0;
aa8223c7
ACM		 1181 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1182 iph->daddr, 0,
1183 IPPROTO_TCP, 0);
bbe735e4 1184 ipcss = skb_network_offset(skb);
eddc9ec5 1185 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1186 ipcse = skb_transport_offset(skb) - 1;
1187 tucss = skb_transport_offset(skb);
aa8223c7 1188 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1189 tucse = 0;
1190
1191 i = adapter->tx_ring.next_to_use;
1192 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1193 buffer_info = &adapter->tx_ring.buffer_info[i];
1194 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1195
1196 context_desc->ipcss = ipcss;
1197 context_desc->ipcso = ipcso;
1198 context_desc->ipcse = cpu_to_le16(ipcse);
1199 context_desc->tucss = tucss;
1200 context_desc->tucso = tucso;
1201 context_desc->tucse = cpu_to_le16(tucse);
1202 context_desc->mss = cpu_to_le16(mss);
1203 context_desc->hdr_len = hdr_len;
1204 context_desc->status = 0;
1205 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1206 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1207 | IXGB_CONTEXT_DESC_CMD_TSE
1208 | IXGB_CONTEXT_DESC_CMD_IP
1209 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1210 | IXGB_CONTEXT_DESC_CMD_IDE
1211 | (skb->len - (hdr_len)));
1212
06c2f9ec 1213
03f83041 1214 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1215 adapter->tx_ring.next_to_use = i;
1216
1217 return 1;
1218 }
1da177e4
LT		 1219
1220 return 0;
1221}
1222
446490ca 1223static bool
1da177e4
LT		 1224ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1225{
1226 struct ixgb_context_desc *context_desc;
1227 unsigned int i;
222441a6 1228 u8 css, cso;
1da177e4 1229
03f83041 1230 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1231 struct ixgb_buffer *buffer_info;
ea2ae17d 1232 css = skb_transport_offset(skb);
ff1dcadb 1233 cso = css + skb->csum_offset;
1da177e4
LT		 1234
1235 i = adapter->tx_ring.next_to_use;
1236 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1237 buffer_info = &adapter->tx_ring.buffer_info[i];
1238 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1239
1240 context_desc->tucss = css;
1241 context_desc->tucso = cso;
1242 context_desc->tucse = 0;
1243 /* zero out any previously existing data in one instruction */
222441a6 1244 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1245 context_desc->status = 0;
1246 context_desc->hdr_len = 0;
1247 context_desc->mss = 0;
1248 context_desc->cmd_type_len =
1249 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1250 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1251
03f83041 1252 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1253 adapter->tx_ring.next_to_use = i;
1254
446490ca 1255 return true;
1da177e4
LT		 1256 }
1257
446490ca 1258 return false;
1da177e4
LT		 1259}
1260
1261#define IXGB_MAX_TXD_PWR 14
1262#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1263
235949d1 1264static int
1da177e4
LT		 1265ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1266 unsigned int first)
1267{
1268 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1269 struct ixgb_buffer *buffer_info;
1270 int len = skb->len;
1271 unsigned int offset = 0, size, count = 0, i;
5d927853 1272 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1273
1274 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1275 unsigned int f;
ac79c82e 1276
1da177e4
LT		 1277 len -= skb->data_len;
1278
1279 i = tx_ring->next_to_use;
1280
9a432992 1281 while (len) {
1da177e4 1282 buffer_info = &tx_ring->buffer_info[i];
709cf018 1283 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1284 /* Workaround for premature desc write-backs
1285 * in TSO mode. Append 4-byte sentinel desc */
1286 if (unlikely(mss && !nr_frags && size == len && size > 8))
1287 size -= 4;
1288
1da177e4 1289 buffer_info->length = size;
adc54139 1290 WARN_ON(buffer_info->dma != 0);
34336635 1291 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1292 buffer_info->dma =
1293 pci_map_single(adapter->pdev,
1294 skb->data + offset,
1295 size,
1296 PCI_DMA_TODEVICE);
1dfdd7df 1297 buffer_info->next_to_watch = 0;
1da177e4
LT		 1298
1299 len -= size;
1300 offset += size;
1301 count++;
03f83041 1302 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1303 }
1304
1459336d 1305 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 1306 struct skb_frag_struct *frag;
1307
1308 frag = &skb_shinfo(skb)->frags[f];
1309 len = frag->size;
1310 offset = 0;
1311
9a432992 1312 while (len) {
1da177e4 1313 buffer_info = &tx_ring->buffer_info[i];
709cf018 1314 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1315
1316 /* Workaround for premature desc write-backs
1317 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1318 if (unlikely(mss && (f == (nr_frags - 1))
1319 && size == len && size > 8))
5d927853
JB		 1320 size -= 4;
1321
1da177e4 1322 buffer_info->length = size;
34336635 1323 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1324 buffer_info->dma =
1325 pci_map_page(adapter->pdev,
1326 frag->page,
1327 frag->page_offset + offset,
1328 size,
1329 PCI_DMA_TODEVICE);
1dfdd7df 1330 buffer_info->next_to_watch = 0;
1da177e4
LT		 1331
1332 len -= size;
1333 offset += size;
1334 count++;
03f83041 1335 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1336 }
1337 }
1338 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1339 tx_ring->buffer_info[i].skb = skb;
1340 tx_ring->buffer_info[first].next_to_watch = i;
1341
1342 return count;
1343}
1344
235949d1 1345static void
1da177e4
LT		 1346ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1347{
1348 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1349 struct ixgb_tx_desc *tx_desc = NULL;
1350 struct ixgb_buffer *buffer_info;
222441a6
JP		 1351 u32 cmd_type_len = adapter->tx_cmd_type;
1352 u8 status = 0;
1353 u8 popts = 0;
1da177e4
LT		 1354 unsigned int i;
1355
03f83041 1356 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1357 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1358 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1359 }
1360
03f83041 1361 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1362 popts |= IXGB_TX_DESC_POPTS_TXSM;
1363
03f83041 1364 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1365 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1366
1367 i = tx_ring->next_to_use;
1368
9a432992 1369 while (count--) {
1da177e4
LT		 1370 buffer_info = &tx_ring->buffer_info[i];
1371 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1372 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1373 tx_desc->cmd_type_len =
1374 cpu_to_le32(cmd_type_len | buffer_info->length);
1375 tx_desc->status = status;
1376 tx_desc->popts = popts;
1377 tx_desc->vlan = cpu_to_le16(vlan_id);
1378
03f83041 1379 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1380 }
1381
0060c072
JB		 1382 tx_desc->cmd_type_len |=
1383 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1384
1385 /* Force memory writes to complete before letting h/w
1386 * know there are new descriptors to fetch. (Only
1387 * applicable for weak-ordered memory model archs,
1388 * such as IA-64). */
1389 wmb();
1390
1391 tx_ring->next_to_use = i;
1392 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1393}
1394
dfd341e4
JB		 1395static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1396{
1397 struct ixgb_adapter *adapter = netdev_priv(netdev);
1398 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1399
1400 netif_stop_queue(netdev);
1401 /* Herbert's original patch had:
1402 * smp_mb__after_netif_stop_queue();
1403 * but since that doesn't exist yet, just open code it. */
1404 smp_mb();
1405
1406 /* We need to check again in a case another CPU has just
1407 * made room available. */
1408 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1409 return -EBUSY;
1410
1411 /* A reprieve! */
1412 netif_start_queue(netdev);
1413 ++adapter->restart_queue;
1414 return 0;
1415}
1416
1417static int ixgb_maybe_stop_tx(struct net_device *netdev,
1418 struct ixgb_desc_ring *tx_ring, int size)
1419{
1420 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1421 return 0;
1422 return __ixgb_maybe_stop_tx(netdev, size);
1423}
1424
1425
1da177e4
LT		 1426/* Tx Descriptors needed, worst case */
1427#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1428 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1429#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1430 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1431 + 1 /* one more needed for sentinel TSO workaround */
1da177e4
LT		 1432
1433static int
1434ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1435{
8908c6cd 1436 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1437 unsigned int first;
1438 unsigned int tx_flags = 0;
1da177e4
LT		 1439 int vlan_id = 0;
1440 int tso;
1441
bab2bce7
JB		 1442 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1443 dev_kfree_skb(skb);
1444 return NETDEV_TX_OK;
1445 }
1446
03f83041 1447 if (skb->len <= 0) {
c2199340 1448 dev_kfree_skb(skb);
1da177e4
LT		 1449 return 0;
1450 }
1451
dfd341e4 1452 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1453 DESC_NEEDED)))
f017f14b 1454 return NETDEV_TX_BUSY;
1da177e4 1455
03f83041 1456 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1da177e4
LT		 1457 tx_flags |= IXGB_TX_FLAGS_VLAN;
1458 vlan_id = vlan_tx_tag_get(skb);
1459 }
1460
1461 first = adapter->tx_ring.next_to_use;
0060c072 1462
1da177e4
LT		 1463 tso = ixgb_tso(adapter, skb);
1464 if (tso < 0) {
c2199340 1465 dev_kfree_skb(skb);
1da177e4
LT		 1466 return NETDEV_TX_OK;
1467 }
1468
96f9c2e2 1469 if (likely(tso))
1da177e4 1470 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1471 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1472 tx_flags |= IXGB_TX_FLAGS_CSUM;
1473
1474 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1475 tx_flags);
1476
1477 netdev->trans_start = jiffies;
1478
f017f14b 1479 /* Make sure there is space in the ring for the next send. */
dfd341e4 1480 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
f017f14b 1481
f017f14b 1482 return NETDEV_TX_OK;
1da177e4
LT		 1483}
1484
1485/**
1486 * ixgb_tx_timeout - Respond to a Tx Hang
1487 * @netdev: network interface device structure
1488 **/
1489
1490static void
1491ixgb_tx_timeout(struct net_device *netdev)
1492{
8908c6cd 1493 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1494
1495 /* Do the reset outside of interrupt context */
1496 schedule_work(&adapter->tx_timeout_task);
1497}
1498
1499static void
c4028958 1500ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1501{
c4028958
DH		 1502 struct ixgb_adapter *adapter =
1503 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1504
9b8118df 1505 adapter->tx_timeout_count++;
446490ca 1506 ixgb_down(adapter, true);
1da177e4
LT		 1507 ixgb_up(adapter);
1508}
1509
1510/**
1511 * ixgb_get_stats - Get System Network Statistics
1512 * @netdev: network interface device structure
1513 *
1514 * Returns the address of the device statistics structure.
1515 * The statistics are actually updated from the timer callback.
1516 **/
1517
1518static struct net_device_stats *
1519ixgb_get_stats(struct net_device *netdev)
1520{
8908c6cd 1521 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1522
1523 return &adapter->net_stats;
1524}
1525
1526/**
1527 * ixgb_change_mtu - Change the Maximum Transfer Unit
1528 * @netdev: network interface device structure
1529 * @new_mtu: new value for maximum frame size
1530 *
1531 * Returns 0 on success, negative on failure
1532 **/
1533
1534static int
1535ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1536{
8908c6cd 1537 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1538 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1539 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1540
a65a604a
JB		 1541 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1542 if ((new_mtu < 68) ||
1543 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
ec9c3f5d 1544 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1545 return -EINVAL;
1546 }
1547
b5ca88eb
JB		 1548 if (old_max_frame == max_frame)
1549 return 0;
1550
1551 if (netif_running(netdev))
1552 ixgb_down(adapter, true);
1553
a3dc3da0 1554 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1555
1556 netdev->mtu = new_mtu;
1557
b5ca88eb 1558 if (netif_running(netdev))
1da177e4 1559 ixgb_up(adapter);
1da177e4
LT		 1560
1561 return 0;
1562}
1563
1564/**
1565 * ixgb_update_stats - Update the board statistics counters.
1566 * @adapter: board private structure
1567 **/
1568
1569void
1570ixgb_update_stats(struct ixgb_adapter *adapter)
1571{
5633684d 1572 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1573 struct pci_dev *pdev = adapter->pdev;
1574
1575 /* Prevent stats update while adapter is being reset */
81b1955e 1576 if (pci_channel_offline(pdev))
01748fbb 1577 return;
5633684d 1578
03f83041 1579 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
5633684d
MC		 1580 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1581 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1582 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1583 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1584 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1585
1586 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1587 /* fix up multicast stats by removing broadcasts */
03f83041 1588 if (multi >= bcast)
7b89178d 1589 multi -= bcast;
0060c072 1590
5633684d
MC		 1591 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1592 adapter->stats.mprch += (multi >> 32);
0060c072 1593 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1594 adapter->stats.bprch += bcast_h;
1595 } else {
1596 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1597 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1598 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1599 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1600 }
1da177e4
LT		 1601 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1602 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1603 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1604 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1605 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1606 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1607 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1608 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1609 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1610 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1611 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1612 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1613 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1614 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1615 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1616 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1617 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1618 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1619 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1620 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1621 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1622 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1623 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1624 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1625 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1626 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1627 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1628 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1629 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1630 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1631 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1632 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1633 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1634 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1635 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1636 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1637 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1638 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1639 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1640 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1641 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1642 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1643 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1644 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1645 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1646 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1647 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1648 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1649 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1650 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1651 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1652 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1653 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1654 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1655 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1656 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1657
1658 /* Fill out the OS statistics structure */
1659
1660 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1661 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1662 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1663 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1664 adapter->net_stats.multicast = adapter->stats.mprcl;
1665 adapter->net_stats.collisions = 0;
1666
1667 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1668 * with a length in the type/len field */
1669 adapter->net_stats.rx_errors =
1670 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1671 adapter->stats.ruc +
1672 adapter->stats.roc /*+ adapter->stats.rlec */ +
1673 adapter->stats.icbc +
1674 adapter->stats.ecbc + adapter->stats.mpc;
1675
1da177e4
LT		 1676 /* see above
1677 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1678 */
1679
1680 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1681 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1682 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1683 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1684
1685 adapter->net_stats.tx_errors = 0;
1686 adapter->net_stats.rx_frame_errors = 0;
1687 adapter->net_stats.tx_aborted_errors = 0;
1688 adapter->net_stats.tx_carrier_errors = 0;
1689 adapter->net_stats.tx_fifo_errors = 0;
1690 adapter->net_stats.tx_heartbeat_errors = 0;
1691 adapter->net_stats.tx_window_errors = 0;
1692}
1693
1694#define IXGB_MAX_INTR 10
1695/**
1696 * ixgb_intr - Interrupt Handler
1697 * @irq: interrupt number
1698 * @data: pointer to a network interface device structure
1da177e4
LT		 1699 **/
1700
1701static irqreturn_t
7d12e780 1702ixgb_intr(int irq, void *data)
1da177e4
LT		 1703{
1704 struct net_device *netdev = data;
8908c6cd 1705 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1706 struct ixgb_hw *hw = &adapter->hw;
222441a6 1707 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4 1708
03f83041 1709 if (unlikely(!icr))
1da177e4
LT		 1710 return IRQ_NONE; /* Not our interrupt */
1711
bab2bce7
JB		 1712 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1713 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1714 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4 1715
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 1724 }
1da177e4
LT		 1725 return IRQ_HANDLED;
1726}
1727
1da177e4
LT		 1728/**
1729 * ixgb_clean - NAPI Rx polling callback
1730 * @adapter: board private structure
1731 **/
1732
1733static int
bea3348e 1734ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1735{
bea3348e
SH		 1736 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1737 struct net_device *netdev = adapter->netdev;
1da177e4
LT		 1738 int work_done = 0;
1739
53e52c72 1740 ixgb_clean_tx_irq(adapter);
bea3348e 1741 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1742
53e52c72
DM		 1743 /* If budget not fully consumed, exit the polling mode */
1744 if (work_done < budget) {
bea3348e 1745 netif_rx_complete(netdev, napi);
72ab5195
JB		 1746 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1747 ixgb_irq_enable(adapter);
1da177e4
LT		 1748 }
1749
bea3348e 1750 return work_done;
1da177e4 1751}
1da177e4
LT		 1752
1753/**
1754 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1755 * @adapter: board private structure
1756 **/
1757
446490ca 1758static bool
1da177e4
LT		 1759ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1760{
1761 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1762 struct net_device *netdev = adapter->netdev;
1763 struct ixgb_tx_desc *tx_desc, *eop_desc;
1764 struct ixgb_buffer *buffer_info;
1765 unsigned int i, eop;
446490ca 1766 bool cleaned = false;
1da177e4
LT		 1767
1768 i = tx_ring->next_to_clean;
1769 eop = tx_ring->buffer_info[i].next_to_watch;
1770 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1771
9a432992 1772 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1773
446490ca 1774 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1775 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1776 buffer_info = &tx_ring->buffer_info[i];
1777
0060c072
JB		 1778 if (tx_desc->popts &
1779 (IXGB_TX_DESC_POPTS_TXSM |
1780 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1781 adapter->hw_csum_tx_good++;
1782
1783 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1784
222441a6 1785 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1786
1787 cleaned = (i == eop);
03f83041 1788 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1789 }
1790
1791 eop = tx_ring->buffer_info[i].next_to_watch;
1792 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1793 }
1794
1795 tx_ring->next_to_clean = i;
1796
0f8ecbad
JB		 1797 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1798 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1799 /* Make sure that anybody stopping the queue after this
1800 * sees the new next_to_clean. */
1801 smp_mb();
1802
1803 if (netif_queue_stopped(netdev) &&
1804 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1805 netif_wake_queue(netdev);
0f8ecbad
JB		 1806 ++adapter->restart_queue;
1807 }
1da177e4 1808 }
1da177e4 1809
03f83041 1810 if (adapter->detect_tx_hung) {
1da177e4
LT		 1811 /* detect a transmit hang in hardware, this serializes the
1812 * check with the clearing of time_stamp and movement of i */
446490ca 1813 adapter->detect_tx_hung = false;
9b8118df
AK		 1814 if (tx_ring->buffer_info[eop].dma &&
1815 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1816 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1817 IXGB_STATUS_TXOFF)) {
1818 /* detected Tx unit hang */
1819 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1820 " TDH <%x>\n"
1821 " TDT <%x>\n"
1822 " next_to_use <%x>\n"
1823 " next_to_clean <%x>\n"
1824 "buffer_info[next_to_clean]\n"
1825 " time_stamp <%lx>\n"
1826 " next_to_watch <%x>\n"
1827 " jiffies <%lx>\n"
1828 " next_to_watch.status <%x>\n",
1829 IXGB_READ_REG(&adapter->hw, TDH),
1830 IXGB_READ_REG(&adapter->hw, TDT),
1831 tx_ring->next_to_use,
1832 tx_ring->next_to_clean,
1833 tx_ring->buffer_info[eop].time_stamp,
1834 eop,
1835 jiffies,
1836 eop_desc->status);
1da177e4 1837 netif_stop_queue(netdev);
9b8118df 1838 }
1da177e4
LT		 1839 }
1840
1841 return cleaned;
1842}
1843
1844/**
1845 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1846 * @adapter: board private structure
1847 * @rx_desc: receive descriptor
1848 * @sk_buff: socket buffer with received data
1849 **/
1850
235949d1 1851static void
1da177e4 1852ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1853 struct ixgb_rx_desc *rx_desc,
1854 struct sk_buff *skb)
1da177e4
LT		 1855{
1856 /* Ignore Checksum bit is set OR
1857 * TCP Checksum has not been calculated
1858 */
03f83041 1859 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4
LT		 1860 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1861 skb->ip_summed = CHECKSUM_NONE;
1862 return;
1863 }
1864
1865 /* At this point we know the hardware did the TCP checksum */
1866 /* now look at the TCP checksum error bit */
03f83041 1867 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4
LT		 1868 /* let the stack verify checksum errors */
1869 skb->ip_summed = CHECKSUM_NONE;
1870 adapter->hw_csum_rx_error++;
1871 } else {
1872 /* TCP checksum is good */
1873 skb->ip_summed = CHECKSUM_UNNECESSARY;
1874 adapter->hw_csum_rx_good++;
1875 }
1876}
1877
1878/**
1879 * ixgb_clean_rx_irq - Send received data up the network stack,
1880 * @adapter: board private structure
1881 **/
1882
446490ca 1883static bool
1da177e4 1884ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1da177e4
LT		 1885{
1886 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1887 struct net_device *netdev = adapter->netdev;
1888 struct pci_dev *pdev = adapter->pdev;
1889 struct ixgb_rx_desc *rx_desc, *next_rxd;
1890 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1891 u32 length;
1da177e4 1892 unsigned int i, j;
fc2d14e3 1893 int cleaned_count = 0;
446490ca 1894 bool cleaned = false;
1da177e4
LT		 1895
1896 i = rx_ring->next_to_clean;
1897 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1898 buffer_info = &rx_ring->buffer_info[i];
1899
9a432992 1900 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
fc2d14e3 1901 struct sk_buff *skb;
f404de1c 1902 u8 status;
1da177e4 1903
03f83041 1904 if (*work_done >= work_to_do)
1da177e4
LT		 1905 break;
1906
1907 (*work_done)++;
f404de1c 1908 status = rx_desc->status;
1da177e4 1909 skb = buffer_info->skb;
1dfdd7df 1910 buffer_info->skb = NULL;
f404de1c 1911
fc2d14e3 1912 prefetch(skb->data - NET_IP_ALIGN);
1da177e4 1913
03f83041 1914 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 1915 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1916 prefetch(next_rxd);
1917
03f83041 1918 if ((j = i + 1) == rx_ring->count) j = 0;
1da177e4
LT		 1919 next2_buffer = &rx_ring->buffer_info[j];
1920 prefetch(next2_buffer);
1921
1922 next_buffer = &rx_ring->buffer_info[i];
1da177e4 1923
446490ca 1924 cleaned = true;
fc2d14e3 1925 cleaned_count++;
1da177e4
LT		 1926
1927 pci_unmap_single(pdev,
1928 buffer_info->dma,
1929 buffer_info->length,
1930 PCI_DMA_FROMDEVICE);
fc2d14e3 1931 buffer_info->dma = 0;
1da177e4
LT		 1932
1933 length = le16_to_cpu(rx_desc->length);
fc2d14e3 1934 rx_desc->length = 0;
1da177e4 1935
03f83041 1936 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 1937
1938 /* All receives must fit into a single buffer */
1939
1940 IXGB_DBG("Receive packet consumed multiple buffers "
1941 "length<%x>\n", length);
1942
1943 dev_kfree_skb_irq(skb);
f404de1c 1944 goto rxdesc_done;
1da177e4
LT		 1945 }
1946
0060c072
JB		 1947 if (unlikely(rx_desc->errors &
1948 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
1949 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 1950 dev_kfree_skb_irq(skb);
f404de1c 1951 goto rxdesc_done;
1da177e4
LT		 1952 }
1953
6b900bb4
AK		 1954 /* code added for copybreak, this should improve
1955 * performance for small packets with large amounts
1956 * of reassembly being done in the stack */
d9fed18b 1957 if (length < copybreak) {
6b900bb4 1958 struct sk_buff *new_skb =
5791704f 1959 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
6b900bb4
AK		 1960 if (new_skb) {
1961 skb_reserve(new_skb, NET_IP_ALIGN);
27d7ff46
ACM		 1962 skb_copy_to_linear_data_offset(new_skb,
1963 -NET_IP_ALIGN,
1964 (skb->data -
1965 NET_IP_ALIGN),
1966 (length +
1967 NET_IP_ALIGN));
6b900bb4
AK		 1968 /* save the skb in buffer_info as good */
1969 buffer_info->skb = skb;
1970 skb = new_skb;
1971 }
1972 }
1973 /* end copybreak code */
1974
1da177e4
LT		 1975 /* Good Receive */
1976 skb_put(skb, length);
1977
1978 /* Receive Checksum Offload */
1979 ixgb_rx_checksum(adapter, rx_desc, skb);
1980
1981 skb->protocol = eth_type_trans(skb, netdev);
03f83041 1982 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 1983 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
0060c072 1984 le16_to_cpu(rx_desc->special));
1da177e4
LT		 1985 } else {
1986 netif_receive_skb(skb);
1987 }
1da177e4 1988
f404de1c
MC		 1989rxdesc_done:
1990 /* clean up descriptor, might be written over by hw */
1da177e4 1991 rx_desc->status = 0;
1da177e4 1992
fc2d14e3
JB		 1993 /* return some buffers to hardware, one at a time is too slow */
1994 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
1995 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1996 cleaned_count = 0;
1997 }
1998
f404de1c 1999 /* use prefetched values */
1da177e4
LT		 2000 rx_desc = next_rxd;
2001 buffer_info = next_buffer;
2002 }
2003
2004 rx_ring->next_to_clean = i;
2005
fc2d14e3
JB		 2006 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2007 if (cleaned_count)
2008 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1da177e4
LT		 2009
2010 return cleaned;
2011}
2012
2013/**
2014 * ixgb_alloc_rx_buffers - Replace used receive buffers
2015 * @adapter: address of board private structure
2016 **/
2017
2018static void
fc2d14e3 2019ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
1da177e4
LT		 2020{
2021 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2022 struct net_device *netdev = adapter->netdev;
2023 struct pci_dev *pdev = adapter->pdev;
2024 struct ixgb_rx_desc *rx_desc;
2025 struct ixgb_buffer *buffer_info;
2026 struct sk_buff *skb;
2027 unsigned int i;
1da177e4
LT		 2028 long cleancount;
2029
2030 i = rx_ring->next_to_use;
2031 buffer_info = &rx_ring->buffer_info[i];
2032 cleancount = IXGB_DESC_UNUSED(rx_ring);
2033
1da177e4 2034
41639fed 2035 /* leave three descriptors unused */
fc2d14e3 2036 while (--cleancount > 2 && cleaned_count--) {
1dfdd7df 2037 /* recycle! its good for you */
69c7a940
AK		 2038 skb = buffer_info->skb;
2039 if (skb) {
1dfdd7df
AK		 2040 skb_trim(skb, 0);
2041 goto map_skb;
2042 }
1da177e4 2043
69c7a940
AK		 2044 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2045 + NET_IP_ALIGN);
1dfdd7df 2046 if (unlikely(!skb)) {
1da177e4 2047 /* Better luck next round */
1dfdd7df 2048 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2049 break;
2050 }
2051
2052 /* Make buffer alignment 2 beyond a 16 byte boundary
2053 * this will result in a 16 byte aligned IP header after
2054 * the 14 byte MAC header is removed
2055 */
2056 skb_reserve(skb, NET_IP_ALIGN);
2057
1da177e4
LT		 2058 buffer_info->skb = skb;
2059 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df
AK		 2060map_skb:
2061 buffer_info->dma = pci_map_single(pdev,
2062 skb->data,
2063 adapter->rx_buffer_len,
2064 PCI_DMA_FROMDEVICE);
1da177e4 2065
1dfdd7df 2066 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2067 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2068 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2069 * this is the rest of the workaround for h/w double
41639fed
MC		 2070 * writeback. */
2071 rx_desc->status = 0;
1da177e4 2072
1da177e4 2073
03f83041 2074 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2075 buffer_info = &rx_ring->buffer_info[i];
2076 }
2077
1dfdd7df
AK		 2078 if (likely(rx_ring->next_to_use != i)) {
2079 rx_ring->next_to_use = i;
2080 if (unlikely(i-- == 0))
2081 i = (rx_ring->count - 1);
2082
2083 /* Force memory writes to complete before letting h/w
2084 * know there are new descriptors to fetch. (Only
2085 * applicable for weak-ordered memory model archs, such
2086 * as IA-64). */
2087 wmb();
2088 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2089 }
1da177e4
LT		 2090}
2091
2092/**
2093 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
0060c072 2094 *
1da177e4
LT		 2095 * @param netdev network interface device structure
2096 * @param grp indicates to enable or disable tagging/stripping
2097 **/
2098static void
2099ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2100{
8908c6cd 2101 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2102 u32 ctrl, rctl;
1da177e4
LT		 2103
2104 ixgb_irq_disable(adapter);
2105 adapter->vlgrp = grp;
2106
03f83041 2107 if (grp) {
1da177e4
LT		 2108 /* enable VLAN tag insert/strip */
2109 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2110 ctrl |= IXGB_CTRL0_VME;
2111 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2112
2113 /* enable VLAN receive filtering */
2114
2115 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
1da177e4
LT		 2116 rctl &= ~IXGB_RCTL_CFIEN;
2117 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2118 } else {
2119 /* disable VLAN tag insert/strip */
2120
2121 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2122 ctrl &= ~IXGB_CTRL0_VME;
2123 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
1da177e4
LT		 2124 }
2125
bab2bce7
JB		 2126 /* don't enable interrupts unless we are UP */
2127 if (adapter->netdev->flags & IFF_UP)
2128 ixgb_irq_enable(adapter);
1da177e4
LT		 2129}
2130
2131static void
222441a6 2132ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2133{
8908c6cd 2134 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2135 u32 vfta, index;
1da177e4
LT		 2136
2137 /* add VID to filter table */
2138
2139 index = (vid >> 5) & 0x7F;
2140 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2141 vfta |= (1 << (vid & 0x1F));
2142 ixgb_write_vfta(&adapter->hw, index, vfta);
2143}
2144
2145static void
222441a6 2146ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2147{
8908c6cd 2148 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2149 u32 vfta, index;
1da177e4
LT		 2150
2151 ixgb_irq_disable(adapter);
2152
5c15bdec 2153 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 2154
bab2bce7
JB		 2155 /* don't enable interrupts unless we are UP */
2156 if (adapter->netdev->flags & IFF_UP)
2157 ixgb_irq_enable(adapter);
1da177e4 2158
bab2bce7 2159 /* remove VID from filter table */
1da177e4
LT		 2160
2161 index = (vid >> 5) & 0x7F;
2162 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2163 vfta &= ~(1 << (vid & 0x1F));
2164 ixgb_write_vfta(&adapter->hw, index, vfta);
2165}
2166
2167static void
2168ixgb_restore_vlan(struct ixgb_adapter *adapter)
2169{
2170 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2171
03f83041 2172 if (adapter->vlgrp) {
222441a6 2173 u16 vid;
1459336d 2174 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
03f83041 2175 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2176 continue;
2177 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2178 }
2179 }
2180}
2181
1da177e4
LT		 2182#ifdef CONFIG_NET_POLL_CONTROLLER
2183/*
2184 * Polling 'interrupt' - used by things like netconsole to send skbs
2185 * without having to re-enable interrupts. It's not called while
2186 * the interrupt routine is executing.
2187 */
2188
2189static void ixgb_netpoll(struct net_device *dev)
2190{
f990b426 2191 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2192
1da177e4 2193 disable_irq(adapter->pdev->irq);
7d12e780 2194 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2195 enable_irq(adapter->pdev->irq);
2196}
2197#endif
2198
01748fbb
LV		 2199/**
2200 * ixgb_io_error_detected() - called when PCI error is detected
2201 * @pdev pointer to pci device with error
2202 * @state pci channel state after error
2203 *
2204 * This callback is called by the PCI subsystem whenever
2205 * a PCI bus error is detected.
2206 */
0060c072
JB		 2207static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2208 enum pci_channel_state state)
01748fbb
LV		 2209{
2210 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2211 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2212
03f83041 2213 if (netif_running(netdev))
446490ca 2214 ixgb_down(adapter, true);
01748fbb
LV		 2215
2216 pci_disable_device(pdev);
2217
2218 /* Request a slot reset. */
2219 return PCI_ERS_RESULT_NEED_RESET;
2220}
2221
2222/**
2223 * ixgb_io_slot_reset - called after the pci bus has been reset.
2224 * @pdev pointer to pci device with error
2225 *
52035bdb 2226 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2227 * Basically, this tries to restart the card from scratch.
2228 * This is a shortened version of the device probe/discovery code,
2229 * it resembles the first-half of the ixgb_probe() routine.
2230 */
0060c072 2231static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2232{
2233 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2234 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2235
03f83041 2236 if (pci_enable_device(pdev)) {
01748fbb
LV		 2237 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2238 return PCI_ERS_RESULT_DISCONNECT;
2239 }
2240
2241 /* Perform card reset only on one instance of the card */
2242 if (0 != PCI_FUNC (pdev->devfn))
2243 return PCI_ERS_RESULT_RECOVERED;
2244
2245 pci_set_master(pdev);
2246
2247 netif_carrier_off(netdev);
2248 netif_stop_queue(netdev);
2249 ixgb_reset(adapter);
2250
2251 /* Make sure the EEPROM is good */
03f83041 2252 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
01748fbb
LV		 2253 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2254 return PCI_ERS_RESULT_DISCONNECT;
2255 }
2256 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2257 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2258
03f83041 2259 if (!is_valid_ether_addr(netdev->perm_addr)) {
01748fbb
LV		 2260 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2261 return PCI_ERS_RESULT_DISCONNECT;
2262 }
2263
2264 return PCI_ERS_RESULT_RECOVERED;
2265}
2266
2267/**
2268 * ixgb_io_resume - called when its OK to resume normal operations
2269 * @pdev pointer to pci device with error
2270 *
2271 * The error recovery driver tells us that its OK to resume
2272 * normal operation. Implementation resembles the second-half
2273 * of the ixgb_probe() routine.
2274 */
0060c072 2275static void ixgb_io_resume(struct pci_dev *pdev)
01748fbb
LV		 2276{
2277 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2278 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2279
2280 pci_set_master(pdev);
2281
03f83041
JB		 2282 if (netif_running(netdev)) {
2283 if (ixgb_up(adapter)) {
01748fbb
LV		 2284 printk ("ixgb: can't bring device back up after reset\n");
2285 return;
2286 }
2287 }
2288
2289 netif_device_attach(netdev);
2290 mod_timer(&adapter->watchdog_timer, jiffies);
2291}
2292
1da177e4 2293/* ixgb_main.c */
kernel source for telekom puls (alcatel/mediatek)