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ixgbe: fix link down initial state
[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,
00829823 327 .ndo_start_xmit = ixgb_xmit_frame,
0edc3527
SH		 328 .ndo_get_stats = ixgb_get_stats,
329 .ndo_set_multicast_list = ixgb_set_multi,
330 .ndo_validate_addr = eth_validate_addr,
331 .ndo_set_mac_address = ixgb_set_mac,
332 .ndo_change_mtu = ixgb_change_mtu,
333 .ndo_tx_timeout = ixgb_tx_timeout,
334 .ndo_vlan_rx_register = ixgb_vlan_rx_register,
335 .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid,
336 .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid,
337#ifdef CONFIG_NET_POLL_CONTROLLER
338 .ndo_poll_controller = ixgb_netpoll,
339#endif
340};
341
1da177e4
LT		 342/**
343 * ixgb_probe - Device Initialization Routine
344 * @pdev: PCI device information struct
345 * @ent: entry in ixgb_pci_tbl
346 *
347 * Returns 0 on success, negative on failure
348 *
349 * ixgb_probe initializes an adapter identified by a pci_dev structure.
350 * The OS initialization, configuring of the adapter private structure,
351 * and a hardware reset occur.
352 **/
353
354static int __devinit
0060c072 355ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 356{
357 struct net_device *netdev = NULL;
358 struct ixgb_adapter *adapter;
359 static int cards_found = 0;
1da177e4
LT		 360 int pci_using_dac;
361 int i;
362 int err;
363
9e7bd330
JB		 364 err = pci_enable_device(pdev);
365 if (err)
1da177e4
LT		 366 return err;
367
6a35528a
YH		 368 if (!(err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) &&
369 !(err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))) {
1da177e4
LT		 370 pci_using_dac = 1;
371 } else {
284901a9
YH		 372 if ((err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) ||
373 (err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))) {
ec9c3f5d
AK		 374 printk(KERN_ERR
375 "ixgb: No usable DMA configuration, aborting\n");
c91e468a 376 goto err_dma_mask;
1da177e4
LT		 377 }
378 pci_using_dac = 0;
379 }
380
9e7bd330
JB		 381 err = pci_request_regions(pdev, ixgb_driver_name);
382 if (err)
c91e468a 383 goto err_request_regions;
1da177e4
LT		 384
385 pci_set_master(pdev);
386
387 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
03f83041 388 if (!netdev) {
1da177e4
LT		 389 err = -ENOMEM;
390 goto err_alloc_etherdev;
391 }
392
1da177e4
LT		 393 SET_NETDEV_DEV(netdev, &pdev->dev);
394
395 pci_set_drvdata(pdev, netdev);
8908c6cd 396 adapter = netdev_priv(netdev);
1da177e4
LT		 397 adapter->netdev = netdev;
398 adapter->pdev = pdev;
399 adapter->hw.back = adapter;
ec9c3f5d 400 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
1da177e4 401
275f165f 402 adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
e539e466 403 if (!adapter->hw.hw_addr) {
1da177e4
LT		 404 err = -EIO;
405 goto err_ioremap;
406 }
407
1459336d 408 for (i = BAR_1; i <= BAR_5; i++) {
03f83041 409 if (pci_resource_len(pdev, i) == 0)
1da177e4 410 continue;
03f83041 411 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 412 adapter->hw.io_base = pci_resource_start(pdev, i);
413 break;
414 }
415 }
416
0edc3527 417 netdev->netdev_ops = &ixgb_netdev_ops;
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 889{
1dfdd7df 890 buffer_info->dma = 0;
fe52eeb8
AD		 891 if (buffer_info->skb) {
892 skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb,
893 DMA_TO_DEVICE);
894 dev_kfree_skb_any(buffer_info->skb);
895 buffer_info->skb = NULL;
896 }
1dfdd7df
AK		 897 buffer_info->time_stamp = 0;
898 /* these fields must always be initialized in tx
899 * buffer_info->length = 0;
900 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 901}
902
903/**
904 * ixgb_clean_tx_ring - Free Tx Buffers
905 * @adapter: board private structure
906 **/
907
908static void
909ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
910{
911 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
912 struct ixgb_buffer *buffer_info;
913 unsigned long size;
914 unsigned int i;
915
916 /* Free all the Tx ring sk_buffs */
917
1459336d 918 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 919 buffer_info = &tx_ring->buffer_info[i];
920 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
921 }
922
923 size = sizeof(struct ixgb_buffer) * tx_ring->count;
924 memset(tx_ring->buffer_info, 0, size);
925
926 /* Zero out the descriptor ring */
927
928 memset(tx_ring->desc, 0, tx_ring->size);
929
930 tx_ring->next_to_use = 0;
931 tx_ring->next_to_clean = 0;
932
933 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
934 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
935}
936
937/**
938 * ixgb_free_rx_resources - Free Rx Resources
939 * @adapter: board private structure
940 *
941 * Free all receive software resources
942 **/
943
944void
945ixgb_free_rx_resources(struct ixgb_adapter *adapter)
946{
947 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
948 struct pci_dev *pdev = adapter->pdev;
949
950 ixgb_clean_rx_ring(adapter);
951
952 vfree(rx_ring->buffer_info);
953 rx_ring->buffer_info = NULL;
954
955 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
956
957 rx_ring->desc = NULL;
958}
959
960/**
961 * ixgb_clean_rx_ring - Free Rx Buffers
962 * @adapter: board private structure
963 **/
964
965static void
966ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
967{
968 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
969 struct ixgb_buffer *buffer_info;
970 struct pci_dev *pdev = adapter->pdev;
971 unsigned long size;
972 unsigned int i;
973
974 /* Free all the Rx ring sk_buffs */
975
1459336d 976 for (i = 0; i < rx_ring->count; i++) {
1da177e4 977 buffer_info = &rx_ring->buffer_info[i];
23e55a32 978 if (buffer_info->dma) {
1da177e4
LT		 979 pci_unmap_single(pdev,
980 buffer_info->dma,
981 buffer_info->length,
982 PCI_DMA_FROMDEVICE);
23e55a32
BJ		 983 buffer_info->dma = 0;
984 buffer_info->length = 0;
985 }
1da177e4 986
23e55a32 987 if (buffer_info->skb) {
1da177e4 988 dev_kfree_skb(buffer_info->skb);
1da177e4
LT		 989 buffer_info->skb = NULL;
990 }
991 }
992
993 size = sizeof(struct ixgb_buffer) * rx_ring->count;
994 memset(rx_ring->buffer_info, 0, size);
995
996 /* Zero out the descriptor ring */
997
998 memset(rx_ring->desc, 0, rx_ring->size);
999
1000 rx_ring->next_to_clean = 0;
1001 rx_ring->next_to_use = 0;
1002
1003 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1004 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1005}
1006
1007/**
1008 * ixgb_set_mac - Change the Ethernet Address of the NIC
1009 * @netdev: network interface device structure
1010 * @p: pointer to an address structure
1011 *
1012 * Returns 0 on success, negative on failure
1013 **/
1014
1015static int
1016ixgb_set_mac(struct net_device *netdev, void *p)
1017{
8908c6cd 1018 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1019 struct sockaddr *addr = p;
1020
03f83041 1021 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1022 return -EADDRNOTAVAIL;
1023
1024 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1025
1026 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1027
1028 return 0;
1029}
1030
1031/**
1032 * ixgb_set_multi - Multicast and Promiscuous mode set
1033 * @netdev: network interface device structure
1034 *
1035 * The set_multi entry point is called whenever the multicast address
1036 * list or the network interface flags are updated. This routine is
1037 * responsible for configuring the hardware for proper multicast,
1038 * promiscuous mode, and all-multi behavior.
1039 **/
1040
1041static void
1042ixgb_set_multi(struct net_device *netdev)
1043{
8908c6cd 1044 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1045 struct ixgb_hw *hw = &adapter->hw;
1046 struct dev_mc_list *mc_ptr;
222441a6 1047 u32 rctl;
1da177e4
LT		 1048 int i;
1049
1050 /* Check for Promiscuous and All Multicast modes */
1051
1052 rctl = IXGB_READ_REG(hw, RCTL);
1053
03f83041 1054 if (netdev->flags & IFF_PROMISC) {
1da177e4 1055 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
746b9f02 1056 rctl &= ~IXGB_RCTL_VFE;
1da177e4 1057 } else {
746b9f02
PM		 1058 if (netdev->flags & IFF_ALLMULTI) {
1059 rctl |= IXGB_RCTL_MPE;
1060 rctl &= ~IXGB_RCTL_UPE;
1061 } else {
1062 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1063 }
78ed11a5 1064 rctl |= IXGB_RCTL_VFE;
1da177e4
LT		 1065 }
1066
03f83041 1067 if (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1068 rctl |= IXGB_RCTL_MPE;
1069 IXGB_WRITE_REG(hw, RCTL, rctl);
1070 } else {
222441a6 1071 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1072 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1073
1074 IXGB_WRITE_REG(hw, RCTL, rctl);
1075
0060c072
JB		 1076 for (i = 0, mc_ptr = netdev->mc_list;
1077 mc_ptr;
1078 i++, mc_ptr = mc_ptr->next)
1da177e4 1079 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
0060c072 1080 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1da177e4
LT		 1081
1082 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1083 }
1084}
1085
1086/**
1087 * ixgb_watchdog - Timer Call-back
1088 * @data: pointer to netdev cast into an unsigned long
1089 **/
1090
1091static void
1092ixgb_watchdog(unsigned long data)
1093{
1094 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1095 struct net_device *netdev = adapter->netdev;
1096 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1097
1098 ixgb_check_for_link(&adapter->hw);
1099
1100 if (ixgb_check_for_bad_link(&adapter->hw)) {
1101 /* force the reset path */
1102 netif_stop_queue(netdev);
1103 }
1104
03f83041
JB		 1105 if (adapter->hw.link_up) {
1106 if (!netif_carrier_ok(netdev)) {
d276016c
JK		 1107 printk(KERN_INFO "ixgb: %s NIC Link is Up 10 Gbps "
1108 "Full Duplex, Flow Control: %s\n",
1109 netdev->name,
1110 (adapter->hw.fc.type == ixgb_fc_full) ?
1111 "RX/TX" :
1112 ((adapter->hw.fc.type == ixgb_fc_rx_pause) ?
1113 "RX" :
1114 ((adapter->hw.fc.type == ixgb_fc_tx_pause) ?
1115 "TX" : "None")));
1da177e4
LT		 1116 adapter->link_speed = 10000;
1117 adapter->link_duplex = FULL_DUPLEX;
1118 netif_carrier_on(netdev);
1119 netif_wake_queue(netdev);
1120 }
1121 } else {
03f83041 1122 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1123 adapter->link_speed = 0;
1124 adapter->link_duplex = 0;
d276016c
JK		 1125 printk(KERN_INFO "ixgb: %s NIC Link is Down\n",
1126 netdev->name);
1da177e4
LT		 1127 netif_carrier_off(netdev);
1128 netif_stop_queue(netdev);
1129
1130 }
1131 }
1132
1133 ixgb_update_stats(adapter);
1134
03f83041
JB		 1135 if (!netif_carrier_ok(netdev)) {
1136 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1137 /* We've lost link, so the controller stops DMA,
1138 * but we've got queued Tx work that's never going
1139 * to get done, so reset controller to flush Tx.
1140 * (Do the reset outside of interrupt context). */
1141 schedule_work(&adapter->tx_timeout_task);
1142 }
1143 }
1144
1145 /* Force detection of hung controller every watchdog period */
446490ca 1146 adapter->detect_tx_hung = true;
1da177e4
LT		 1147
1148 /* generate an interrupt to force clean up of any stragglers */
1149 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1150
1151 /* Reset the timer */
1152 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1153}
1154
1155#define IXGB_TX_FLAGS_CSUM 0x00000001
1156#define IXGB_TX_FLAGS_VLAN 0x00000002
1157#define IXGB_TX_FLAGS_TSO 0x00000004
1158
235949d1 1159static int
1da177e4
LT		 1160ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1161{
1da177e4
LT		 1162 struct ixgb_context_desc *context_desc;
1163 unsigned int i;
222441a6
JP		 1164 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1165 u16 ipcse, tucse, mss;
1da177e4
LT		 1166 int err;
1167
89114afd 1168 if (likely(skb_is_gso(skb))) {
adc54139 1169 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1170 struct iphdr *iph;
1171
1da177e4
LT		 1172 if (skb_header_cloned(skb)) {
1173 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1174 if (err)
1175 return err;
1176 }
1177
ab6a5bb6 1178 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1179 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1180 iph = ip_hdr(skb);
1181 iph->tot_len = 0;
1182 iph->check = 0;
aa8223c7
ACM		 1183 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1184 iph->daddr, 0,
1185 IPPROTO_TCP, 0);
bbe735e4 1186 ipcss = skb_network_offset(skb);
eddc9ec5 1187 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1188 ipcse = skb_transport_offset(skb) - 1;
1189 tucss = skb_transport_offset(skb);
aa8223c7 1190 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1191 tucse = 0;
1192
1193 i = adapter->tx_ring.next_to_use;
1194 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1195 buffer_info = &adapter->tx_ring.buffer_info[i];
1196 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1197
1198 context_desc->ipcss = ipcss;
1199 context_desc->ipcso = ipcso;
1200 context_desc->ipcse = cpu_to_le16(ipcse);
1201 context_desc->tucss = tucss;
1202 context_desc->tucso = tucso;
1203 context_desc->tucse = cpu_to_le16(tucse);
1204 context_desc->mss = cpu_to_le16(mss);
1205 context_desc->hdr_len = hdr_len;
1206 context_desc->status = 0;
1207 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1208 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1209 | IXGB_CONTEXT_DESC_CMD_TSE
1210 | IXGB_CONTEXT_DESC_CMD_IP
1211 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1212 | IXGB_CONTEXT_DESC_CMD_IDE
1213 | (skb->len - (hdr_len)));
1214
06c2f9ec 1215
03f83041 1216 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1217 adapter->tx_ring.next_to_use = i;
1218
1219 return 1;
1220 }
1da177e4
LT		 1221
1222 return 0;
1223}
1224
446490ca 1225static bool
1da177e4
LT		 1226ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1227{
1228 struct ixgb_context_desc *context_desc;
1229 unsigned int i;
222441a6 1230 u8 css, cso;
1da177e4 1231
03f83041 1232 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1233 struct ixgb_buffer *buffer_info;
ea2ae17d 1234 css = skb_transport_offset(skb);
ff1dcadb 1235 cso = css + skb->csum_offset;
1da177e4
LT		 1236
1237 i = adapter->tx_ring.next_to_use;
1238 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1239 buffer_info = &adapter->tx_ring.buffer_info[i];
1240 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1241
1242 context_desc->tucss = css;
1243 context_desc->tucso = cso;
1244 context_desc->tucse = 0;
1245 /* zero out any previously existing data in one instruction */
222441a6 1246 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1247 context_desc->status = 0;
1248 context_desc->hdr_len = 0;
1249 context_desc->mss = 0;
1250 context_desc->cmd_type_len =
1251 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1252 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1253
03f83041 1254 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1255 adapter->tx_ring.next_to_use = i;
1256
446490ca 1257 return true;
1da177e4
LT		 1258 }
1259
446490ca 1260 return false;
1da177e4
LT		 1261}
1262
1263#define IXGB_MAX_TXD_PWR 14
1264#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1265
235949d1 1266static int
1da177e4
LT		 1267ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1268 unsigned int first)
1269{
1270 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1271 struct ixgb_buffer *buffer_info;
fe52eeb8 1272 int len = skb_headlen(skb);
1da177e4 1273 unsigned int offset = 0, size, count = 0, i;
5d927853 1274 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1275
1276 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1277 unsigned int f;
fe52eeb8 1278 dma_addr_t *map;
1da177e4
LT		 1279
1280 i = tx_ring->next_to_use;
1281
fe52eeb8
AD		 1282 if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
1283 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
1284 return 0;
1285 }
1286
1287 map = skb_shinfo(skb)->dma_maps;
1288
9a432992 1289 while (len) {
1da177e4 1290 buffer_info = &tx_ring->buffer_info[i];
709cf018 1291 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1292 /* Workaround for premature desc write-backs
1293 * in TSO mode. Append 4-byte sentinel desc */
1294 if (unlikely(mss && !nr_frags && size == len && size > 8))
1295 size -= 4;
1296
1da177e4 1297 buffer_info->length = size;
adc54139 1298 WARN_ON(buffer_info->dma != 0);
34336635 1299 buffer_info->time_stamp = jiffies;
fe52eeb8 1300 buffer_info->dma = map[0] + offset;
1da177e4
LT		 1301 pci_map_single(adapter->pdev,
1302 skb->data + offset,
1303 size,
1304 PCI_DMA_TODEVICE);
1dfdd7df 1305 buffer_info->next_to_watch = 0;
1da177e4
LT		 1306
1307 len -= size;
1308 offset += size;
1309 count++;
fe52eeb8
AD		 1310 if (len) {
1311 i++;
1312 if (i == tx_ring->count)
1313 i = 0;
1314 }
1da177e4
LT		 1315 }
1316
1459336d 1317 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 1318 struct skb_frag_struct *frag;
1319
1320 frag = &skb_shinfo(skb)->frags[f];
1321 len = frag->size;
1322 offset = 0;
1323
9a432992 1324 while (len) {
fe52eeb8
AD		 1325 i++;
1326 if (i == tx_ring->count)
1327 i = 0;
1328
1da177e4 1329 buffer_info = &tx_ring->buffer_info[i];
709cf018 1330 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1331
1332 /* Workaround for premature desc write-backs
1333 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1334 if (unlikely(mss && (f == (nr_frags - 1))
1335 && size == len && size > 8))
5d927853
JB		 1336 size -= 4;
1337
1da177e4 1338 buffer_info->length = size;
34336635 1339 buffer_info->time_stamp = jiffies;
fe52eeb8 1340 buffer_info->dma = map[f + 1] + offset;
1dfdd7df 1341 buffer_info->next_to_watch = 0;
1da177e4
LT		 1342
1343 len -= size;
1344 offset += size;
1345 count++;
1da177e4
LT		 1346 }
1347 }
1da177e4
LT		 1348 tx_ring->buffer_info[i].skb = skb;
1349 tx_ring->buffer_info[first].next_to_watch = i;
1350
1351 return count;
1352}
1353
235949d1 1354static void
1da177e4
LT		 1355ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1356{
1357 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1358 struct ixgb_tx_desc *tx_desc = NULL;
1359 struct ixgb_buffer *buffer_info;
222441a6
JP		 1360 u32 cmd_type_len = adapter->tx_cmd_type;
1361 u8 status = 0;
1362 u8 popts = 0;
1da177e4
LT		 1363 unsigned int i;
1364
03f83041 1365 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1366 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1367 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1368 }
1369
03f83041 1370 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1371 popts |= IXGB_TX_DESC_POPTS_TXSM;
1372
03f83041 1373 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1374 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1375
1376 i = tx_ring->next_to_use;
1377
9a432992 1378 while (count--) {
1da177e4
LT		 1379 buffer_info = &tx_ring->buffer_info[i];
1380 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1381 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1382 tx_desc->cmd_type_len =
1383 cpu_to_le32(cmd_type_len | buffer_info->length);
1384 tx_desc->status = status;
1385 tx_desc->popts = popts;
1386 tx_desc->vlan = cpu_to_le16(vlan_id);
1387
03f83041 1388 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1389 }
1390
0060c072
JB		 1391 tx_desc->cmd_type_len |=
1392 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1393
1394 /* Force memory writes to complete before letting h/w
1395 * know there are new descriptors to fetch. (Only
1396 * applicable for weak-ordered memory model archs,
1397 * such as IA-64). */
1398 wmb();
1399
1400 tx_ring->next_to_use = i;
1401 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1402}
1403
dfd341e4
JB		 1404static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1405{
1406 struct ixgb_adapter *adapter = netdev_priv(netdev);
1407 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1408
1409 netif_stop_queue(netdev);
1410 /* Herbert's original patch had:
1411 * smp_mb__after_netif_stop_queue();
1412 * but since that doesn't exist yet, just open code it. */
1413 smp_mb();
1414
1415 /* We need to check again in a case another CPU has just
1416 * made room available. */
1417 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1418 return -EBUSY;
1419
1420 /* A reprieve! */
1421 netif_start_queue(netdev);
1422 ++adapter->restart_queue;
1423 return 0;
1424}
1425
1426static int ixgb_maybe_stop_tx(struct net_device *netdev,
1427 struct ixgb_desc_ring *tx_ring, int size)
1428{
1429 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1430 return 0;
1431 return __ixgb_maybe_stop_tx(netdev, size);
1432}
1433
1434
1da177e4
LT		 1435/* Tx Descriptors needed, worst case */
1436#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1437 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1438#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1439 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1440 + 1 /* one more needed for sentinel TSO workaround */
1da177e4
LT		 1441
1442static int
1443ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1444{
8908c6cd 1445 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1446 unsigned int first;
1447 unsigned int tx_flags = 0;
1da177e4 1448 int vlan_id = 0;
fe52eeb8 1449 int count = 0;
1da177e4
LT		 1450 int tso;
1451
bab2bce7
JB		 1452 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1453 dev_kfree_skb(skb);
1454 return NETDEV_TX_OK;
1455 }
1456
03f83041 1457 if (skb->len <= 0) {
c2199340 1458 dev_kfree_skb(skb);
1da177e4
LT		 1459 return 0;
1460 }
1461
dfd341e4 1462 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1463 DESC_NEEDED)))
f017f14b 1464 return NETDEV_TX_BUSY;
1da177e4 1465
03f83041 1466 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1da177e4
LT		 1467 tx_flags |= IXGB_TX_FLAGS_VLAN;
1468 vlan_id = vlan_tx_tag_get(skb);
1469 }
1470
1471 first = adapter->tx_ring.next_to_use;
0060c072 1472
1da177e4
LT		 1473 tso = ixgb_tso(adapter, skb);
1474 if (tso < 0) {
c2199340 1475 dev_kfree_skb(skb);
1da177e4
LT		 1476 return NETDEV_TX_OK;
1477 }
1478
96f9c2e2 1479 if (likely(tso))
1da177e4 1480 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1481 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1482 tx_flags |= IXGB_TX_FLAGS_CSUM;
1483
fe52eeb8 1484 count = ixgb_tx_map(adapter, skb, first);
1da177e4 1485
fe52eeb8
AD		 1486 if (count) {
1487 ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
1488 netdev->trans_start = jiffies;
1489 /* Make sure there is space in the ring for the next send. */
1490 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1da177e4 1491
fe52eeb8
AD		 1492 } else {
1493 dev_kfree_skb_any(skb);
1494 adapter->tx_ring.buffer_info[first].time_stamp = 0;
1495 adapter->tx_ring.next_to_use = first;
1496 }
f017f14b 1497
f017f14b 1498 return NETDEV_TX_OK;
1da177e4
LT		 1499}
1500
1501/**
1502 * ixgb_tx_timeout - Respond to a Tx Hang
1503 * @netdev: network interface device structure
1504 **/
1505
1506static void
1507ixgb_tx_timeout(struct net_device *netdev)
1508{
8908c6cd 1509 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1510
1511 /* Do the reset outside of interrupt context */
1512 schedule_work(&adapter->tx_timeout_task);
1513}
1514
1515static void
c4028958 1516ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1517{
c4028958
DH		 1518 struct ixgb_adapter *adapter =
1519 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1520
9b8118df 1521 adapter->tx_timeout_count++;
446490ca 1522 ixgb_down(adapter, true);
1da177e4
LT		 1523 ixgb_up(adapter);
1524}
1525
1526/**
1527 * ixgb_get_stats - Get System Network Statistics
1528 * @netdev: network interface device structure
1529 *
1530 * Returns the address of the device statistics structure.
1531 * The statistics are actually updated from the timer callback.
1532 **/
1533
1534static struct net_device_stats *
1535ixgb_get_stats(struct net_device *netdev)
1536{
8908c6cd 1537 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1538
1539 return &adapter->net_stats;
1540}
1541
1542/**
1543 * ixgb_change_mtu - Change the Maximum Transfer Unit
1544 * @netdev: network interface device structure
1545 * @new_mtu: new value for maximum frame size
1546 *
1547 * Returns 0 on success, negative on failure
1548 **/
1549
1550static int
1551ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1552{
8908c6cd 1553 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1554 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1555 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1556
a65a604a
JB		 1557 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1558 if ((new_mtu < 68) ||
1559 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
ec9c3f5d 1560 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1561 return -EINVAL;
1562 }
1563
b5ca88eb
JB		 1564 if (old_max_frame == max_frame)
1565 return 0;
1566
1567 if (netif_running(netdev))
1568 ixgb_down(adapter, true);
1569
a3dc3da0 1570 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1571
1572 netdev->mtu = new_mtu;
1573
b5ca88eb 1574 if (netif_running(netdev))
1da177e4 1575 ixgb_up(adapter);
1da177e4
LT		 1576
1577 return 0;
1578}
1579
1580/**
1581 * ixgb_update_stats - Update the board statistics counters.
1582 * @adapter: board private structure
1583 **/
1584
1585void
1586ixgb_update_stats(struct ixgb_adapter *adapter)
1587{
5633684d 1588 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1589 struct pci_dev *pdev = adapter->pdev;
1590
1591 /* Prevent stats update while adapter is being reset */
81b1955e 1592 if (pci_channel_offline(pdev))
01748fbb 1593 return;
5633684d 1594
03f83041 1595 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
5633684d
MC		 1596 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1597 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1598 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1599 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1600 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1601
1602 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1603 /* fix up multicast stats by removing broadcasts */
03f83041 1604 if (multi >= bcast)
7b89178d 1605 multi -= bcast;
0060c072 1606
5633684d
MC		 1607 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1608 adapter->stats.mprch += (multi >> 32);
0060c072 1609 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1610 adapter->stats.bprch += bcast_h;
1611 } else {
1612 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1613 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1614 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1615 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1616 }
1da177e4
LT		 1617 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1618 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1619 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1620 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1621 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1622 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1623 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1624 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1625 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1626 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1627 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1628 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1629 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1630 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1631 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1632 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1633 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1634 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1635 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1636 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1637 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1638 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1639 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1640 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1641 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1642 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1643 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1644 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1645 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1646 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1647 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1648 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1649 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1650 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1651 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1652 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1653 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1654 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1655 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1656 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1657 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1658 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1659 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1660 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1661 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1662 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1663 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1664 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1665 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1666 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1667 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1668 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1669 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1670 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1671 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1672 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1673
1674 /* Fill out the OS statistics structure */
1675
1676 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1677 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1678 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1679 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1680 adapter->net_stats.multicast = adapter->stats.mprcl;
1681 adapter->net_stats.collisions = 0;
1682
1683 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1684 * with a length in the type/len field */
1685 adapter->net_stats.rx_errors =
1686 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1687 adapter->stats.ruc +
1688 adapter->stats.roc /*+ adapter->stats.rlec */ +
1689 adapter->stats.icbc +
1690 adapter->stats.ecbc + adapter->stats.mpc;
1691
1da177e4
LT		 1692 /* see above
1693 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1694 */
1695
1696 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1697 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1698 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1699 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1700
1701 adapter->net_stats.tx_errors = 0;
1702 adapter->net_stats.rx_frame_errors = 0;
1703 adapter->net_stats.tx_aborted_errors = 0;
1704 adapter->net_stats.tx_carrier_errors = 0;
1705 adapter->net_stats.tx_fifo_errors = 0;
1706 adapter->net_stats.tx_heartbeat_errors = 0;
1707 adapter->net_stats.tx_window_errors = 0;
1708}
1709
1710#define IXGB_MAX_INTR 10
1711/**
1712 * ixgb_intr - Interrupt Handler
1713 * @irq: interrupt number
1714 * @data: pointer to a network interface device structure
1da177e4
LT		 1715 **/
1716
1717static irqreturn_t
7d12e780 1718ixgb_intr(int irq, void *data)
1da177e4
LT		 1719{
1720 struct net_device *netdev = data;
8908c6cd 1721 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1722 struct ixgb_hw *hw = &adapter->hw;
222441a6 1723 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4 1724
03f83041 1725 if (unlikely(!icr))
1da177e4
LT		 1726 return IRQ_NONE; /* Not our interrupt */
1727
bab2bce7
JB		 1728 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1729 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1730 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4 1731
288379f0 1732 if (napi_schedule_prep(&adapter->napi)) {
1da177e4 1733
0060c072 1734 /* Disable interrupts and register for poll. The flush
1da177e4
LT		 1735 of the posted write is intentionally left out.
1736 */
1737
1da177e4 1738 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
288379f0 1739 __napi_schedule(&adapter->napi);
1da177e4 1740 }
1da177e4
LT		 1741 return IRQ_HANDLED;
1742}
1743
1da177e4
LT		 1744/**
1745 * ixgb_clean - NAPI Rx polling callback
1746 * @adapter: board private structure
1747 **/
1748
1749static int
bea3348e 1750ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1751{
bea3348e 1752 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1da177e4
LT		 1753 int work_done = 0;
1754
53e52c72 1755 ixgb_clean_tx_irq(adapter);
bea3348e 1756 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1757
53e52c72
DM		 1758 /* If budget not fully consumed, exit the polling mode */
1759 if (work_done < budget) {
288379f0 1760 napi_complete(napi);
72ab5195
JB		 1761 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1762 ixgb_irq_enable(adapter);
1da177e4
LT		 1763 }
1764
bea3348e 1765 return work_done;
1da177e4 1766}
1da177e4
LT		 1767
1768/**
1769 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1770 * @adapter: board private structure
1771 **/
1772
446490ca 1773static bool
1da177e4
LT		 1774ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1775{
1776 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1777 struct net_device *netdev = adapter->netdev;
1778 struct ixgb_tx_desc *tx_desc, *eop_desc;
1779 struct ixgb_buffer *buffer_info;
1780 unsigned int i, eop;
446490ca 1781 bool cleaned = false;
1da177e4
LT		 1782
1783 i = tx_ring->next_to_clean;
1784 eop = tx_ring->buffer_info[i].next_to_watch;
1785 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1786
9a432992 1787 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1788
446490ca 1789 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1790 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1791 buffer_info = &tx_ring->buffer_info[i];
1792
0060c072
JB		 1793 if (tx_desc->popts &
1794 (IXGB_TX_DESC_POPTS_TXSM |
1795 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1796 adapter->hw_csum_tx_good++;
1797
1798 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1799
222441a6 1800 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1801
1802 cleaned = (i == eop);
03f83041 1803 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1804 }
1805
1806 eop = tx_ring->buffer_info[i].next_to_watch;
1807 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1808 }
1809
1810 tx_ring->next_to_clean = i;
1811
0f8ecbad
JB		 1812 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1813 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1814 /* Make sure that anybody stopping the queue after this
1815 * sees the new next_to_clean. */
1816 smp_mb();
1817
1818 if (netif_queue_stopped(netdev) &&
1819 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1820 netif_wake_queue(netdev);
0f8ecbad
JB		 1821 ++adapter->restart_queue;
1822 }
1da177e4 1823 }
1da177e4 1824
03f83041 1825 if (adapter->detect_tx_hung) {
1da177e4
LT		 1826 /* detect a transmit hang in hardware, this serializes the
1827 * check with the clearing of time_stamp and movement of i */
446490ca 1828 adapter->detect_tx_hung = false;
fe52eeb8 1829 if (tx_ring->buffer_info[eop].time_stamp &&
9b8118df 1830 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1831 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1832 IXGB_STATUS_TXOFF)) {
1833 /* detected Tx unit hang */
1834 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1835 " TDH <%x>\n"
1836 " TDT <%x>\n"
1837 " next_to_use <%x>\n"
1838 " next_to_clean <%x>\n"
1839 "buffer_info[next_to_clean]\n"
1840 " time_stamp <%lx>\n"
1841 " next_to_watch <%x>\n"
1842 " jiffies <%lx>\n"
1843 " next_to_watch.status <%x>\n",
1844 IXGB_READ_REG(&adapter->hw, TDH),
1845 IXGB_READ_REG(&adapter->hw, TDT),
1846 tx_ring->next_to_use,
1847 tx_ring->next_to_clean,
1848 tx_ring->buffer_info[eop].time_stamp,
1849 eop,
1850 jiffies,
1851 eop_desc->status);
1da177e4 1852 netif_stop_queue(netdev);
9b8118df 1853 }
1da177e4
LT		 1854 }
1855
1856 return cleaned;
1857}
1858
1859/**
1860 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1861 * @adapter: board private structure
1862 * @rx_desc: receive descriptor
1863 * @sk_buff: socket buffer with received data
1864 **/
1865
235949d1 1866static void
1da177e4 1867ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1868 struct ixgb_rx_desc *rx_desc,
1869 struct sk_buff *skb)
1da177e4
LT		 1870{
1871 /* Ignore Checksum bit is set OR
1872 * TCP Checksum has not been calculated
1873 */
03f83041 1874 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4
LT		 1875 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1876 skb->ip_summed = CHECKSUM_NONE;
1877 return;
1878 }
1879
1880 /* At this point we know the hardware did the TCP checksum */
1881 /* now look at the TCP checksum error bit */
03f83041 1882 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4
LT		 1883 /* let the stack verify checksum errors */
1884 skb->ip_summed = CHECKSUM_NONE;
1885 adapter->hw_csum_rx_error++;
1886 } else {
1887 /* TCP checksum is good */
1888 skb->ip_summed = CHECKSUM_UNNECESSARY;
1889 adapter->hw_csum_rx_good++;
1890 }
1891}
1892
1893/**
1894 * ixgb_clean_rx_irq - Send received data up the network stack,
1895 * @adapter: board private structure
1896 **/
1897
446490ca 1898static bool
1da177e4 1899ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1da177e4
LT		 1900{
1901 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1902 struct net_device *netdev = adapter->netdev;
1903 struct pci_dev *pdev = adapter->pdev;
1904 struct ixgb_rx_desc *rx_desc, *next_rxd;
1905 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1906 u32 length;
1da177e4 1907 unsigned int i, j;
fc2d14e3 1908 int cleaned_count = 0;
446490ca 1909 bool cleaned = false;
1da177e4
LT		 1910
1911 i = rx_ring->next_to_clean;
1912 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1913 buffer_info = &rx_ring->buffer_info[i];
1914
9a432992 1915 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
fc2d14e3 1916 struct sk_buff *skb;
f404de1c 1917 u8 status;
1da177e4 1918
03f83041 1919 if (*work_done >= work_to_do)
1da177e4
LT		 1920 break;
1921
1922 (*work_done)++;
f404de1c 1923 status = rx_desc->status;
1da177e4 1924 skb = buffer_info->skb;
1dfdd7df 1925 buffer_info->skb = NULL;
f404de1c 1926
fc2d14e3 1927 prefetch(skb->data - NET_IP_ALIGN);
1da177e4 1928
03f83041 1929 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 1930 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1931 prefetch(next_rxd);
1932
03f83041 1933 if ((j = i + 1) == rx_ring->count) j = 0;
1da177e4
LT		 1934 next2_buffer = &rx_ring->buffer_info[j];
1935 prefetch(next2_buffer);
1936
1937 next_buffer = &rx_ring->buffer_info[i];
1da177e4 1938
446490ca 1939 cleaned = true;
fc2d14e3 1940 cleaned_count++;
1da177e4
LT		 1941
1942 pci_unmap_single(pdev,
1943 buffer_info->dma,
1944 buffer_info->length,
1945 PCI_DMA_FROMDEVICE);
fc2d14e3 1946 buffer_info->dma = 0;
1da177e4
LT		 1947
1948 length = le16_to_cpu(rx_desc->length);
fc2d14e3 1949 rx_desc->length = 0;
1da177e4 1950
03f83041 1951 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 1952
1953 /* All receives must fit into a single buffer */
1954
1955 IXGB_DBG("Receive packet consumed multiple buffers "
1956 "length<%x>\n", length);
1957
1958 dev_kfree_skb_irq(skb);
f404de1c 1959 goto rxdesc_done;
1da177e4
LT		 1960 }
1961
0060c072
JB		 1962 if (unlikely(rx_desc->errors &
1963 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
1964 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 1965 dev_kfree_skb_irq(skb);
f404de1c 1966 goto rxdesc_done;
1da177e4
LT		 1967 }
1968
6b900bb4
AK		 1969 /* code added for copybreak, this should improve
1970 * performance for small packets with large amounts
1971 * of reassembly being done in the stack */
d9fed18b 1972 if (length < copybreak) {
6b900bb4 1973 struct sk_buff *new_skb =
5791704f 1974 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
6b900bb4
AK		 1975 if (new_skb) {
1976 skb_reserve(new_skb, NET_IP_ALIGN);
27d7ff46
ACM		 1977 skb_copy_to_linear_data_offset(new_skb,
1978 -NET_IP_ALIGN,
1979 (skb->data -
1980 NET_IP_ALIGN),
1981 (length +
1982 NET_IP_ALIGN));
6b900bb4
AK		 1983 /* save the skb in buffer_info as good */
1984 buffer_info->skb = skb;
1985 skb = new_skb;
1986 }
1987 }
1988 /* end copybreak code */
1989
1da177e4
LT		 1990 /* Good Receive */
1991 skb_put(skb, length);
1992
1993 /* Receive Checksum Offload */
1994 ixgb_rx_checksum(adapter, rx_desc, skb);
1995
1996 skb->protocol = eth_type_trans(skb, netdev);
03f83041 1997 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 1998 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
0060c072 1999 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2000 } else {
2001 netif_receive_skb(skb);
2002 }
1da177e4 2003
f404de1c
MC		 2004rxdesc_done:
2005 /* clean up descriptor, might be written over by hw */
1da177e4 2006 rx_desc->status = 0;
1da177e4 2007
fc2d14e3
JB		 2008 /* return some buffers to hardware, one at a time is too slow */
2009 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
2010 ixgb_alloc_rx_buffers(adapter, cleaned_count);
2011 cleaned_count = 0;
2012 }
2013
f404de1c 2014 /* use prefetched values */
1da177e4
LT		 2015 rx_desc = next_rxd;
2016 buffer_info = next_buffer;
2017 }
2018
2019 rx_ring->next_to_clean = i;
2020
fc2d14e3
JB		 2021 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2022 if (cleaned_count)
2023 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1da177e4
LT		 2024
2025 return cleaned;
2026}
2027
2028/**
2029 * ixgb_alloc_rx_buffers - Replace used receive buffers
2030 * @adapter: address of board private structure
2031 **/
2032
2033static void
fc2d14e3 2034ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
1da177e4
LT		 2035{
2036 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2037 struct net_device *netdev = adapter->netdev;
2038 struct pci_dev *pdev = adapter->pdev;
2039 struct ixgb_rx_desc *rx_desc;
2040 struct ixgb_buffer *buffer_info;
2041 struct sk_buff *skb;
2042 unsigned int i;
1da177e4
LT		 2043 long cleancount;
2044
2045 i = rx_ring->next_to_use;
2046 buffer_info = &rx_ring->buffer_info[i];
2047 cleancount = IXGB_DESC_UNUSED(rx_ring);
2048
1da177e4 2049
41639fed 2050 /* leave three descriptors unused */
fc2d14e3 2051 while (--cleancount > 2 && cleaned_count--) {
1dfdd7df 2052 /* recycle! its good for you */
69c7a940
AK		 2053 skb = buffer_info->skb;
2054 if (skb) {
1dfdd7df
AK		 2055 skb_trim(skb, 0);
2056 goto map_skb;
2057 }
1da177e4 2058
69c7a940
AK		 2059 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2060 + NET_IP_ALIGN);
1dfdd7df 2061 if (unlikely(!skb)) {
1da177e4 2062 /* Better luck next round */
1dfdd7df 2063 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2064 break;
2065 }
2066
2067 /* Make buffer alignment 2 beyond a 16 byte boundary
2068 * this will result in a 16 byte aligned IP header after
2069 * the 14 byte MAC header is removed
2070 */
2071 skb_reserve(skb, NET_IP_ALIGN);
2072
1da177e4
LT		 2073 buffer_info->skb = skb;
2074 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df
AK		 2075map_skb:
2076 buffer_info->dma = pci_map_single(pdev,
2077 skb->data,
2078 adapter->rx_buffer_len,
2079 PCI_DMA_FROMDEVICE);
1da177e4 2080
1dfdd7df 2081 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2082 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2083 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2084 * this is the rest of the workaround for h/w double
41639fed
MC		 2085 * writeback. */
2086 rx_desc->status = 0;
1da177e4 2087
1da177e4 2088
03f83041 2089 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2090 buffer_info = &rx_ring->buffer_info[i];
2091 }
2092
1dfdd7df
AK		 2093 if (likely(rx_ring->next_to_use != i)) {
2094 rx_ring->next_to_use = i;
2095 if (unlikely(i-- == 0))
2096 i = (rx_ring->count - 1);
2097
2098 /* Force memory writes to complete before letting h/w
2099 * know there are new descriptors to fetch. (Only
2100 * applicable for weak-ordered memory model archs, such
2101 * as IA-64). */
2102 wmb();
2103 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2104 }
1da177e4
LT		 2105}
2106
2107/**
2108 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
0060c072 2109 *
1da177e4
LT		 2110 * @param netdev network interface device structure
2111 * @param grp indicates to enable or disable tagging/stripping
2112 **/
2113static void
2114ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2115{
8908c6cd 2116 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2117 u32 ctrl, rctl;
1da177e4
LT		 2118
2119 ixgb_irq_disable(adapter);
2120 adapter->vlgrp = grp;
2121
03f83041 2122 if (grp) {
1da177e4
LT		 2123 /* enable VLAN tag insert/strip */
2124 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2125 ctrl |= IXGB_CTRL0_VME;
2126 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2127
2128 /* enable VLAN receive filtering */
2129
2130 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
1da177e4
LT		 2131 rctl &= ~IXGB_RCTL_CFIEN;
2132 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2133 } else {
2134 /* disable VLAN tag insert/strip */
2135
2136 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2137 ctrl &= ~IXGB_CTRL0_VME;
2138 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
1da177e4
LT		 2139 }
2140
bab2bce7
JB		 2141 /* don't enable interrupts unless we are UP */
2142 if (adapter->netdev->flags & IFF_UP)
2143 ixgb_irq_enable(adapter);
1da177e4
LT		 2144}
2145
2146static void
222441a6 2147ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2148{
8908c6cd 2149 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2150 u32 vfta, index;
1da177e4
LT		 2151
2152 /* add VID to filter table */
2153
2154 index = (vid >> 5) & 0x7F;
2155 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2156 vfta |= (1 << (vid & 0x1F));
2157 ixgb_write_vfta(&adapter->hw, index, vfta);
2158}
2159
2160static void
222441a6 2161ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2162{
8908c6cd 2163 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2164 u32 vfta, index;
1da177e4
LT		 2165
2166 ixgb_irq_disable(adapter);
2167
5c15bdec 2168 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 2169
bab2bce7
JB		 2170 /* don't enable interrupts unless we are UP */
2171 if (adapter->netdev->flags & IFF_UP)
2172 ixgb_irq_enable(adapter);
1da177e4 2173
bab2bce7 2174 /* remove VID from filter table */
1da177e4
LT		 2175
2176 index = (vid >> 5) & 0x7F;
2177 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2178 vfta &= ~(1 << (vid & 0x1F));
2179 ixgb_write_vfta(&adapter->hw, index, vfta);
2180}
2181
2182static void
2183ixgb_restore_vlan(struct ixgb_adapter *adapter)
2184{
2185 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2186
03f83041 2187 if (adapter->vlgrp) {
222441a6 2188 u16 vid;
1459336d 2189 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
03f83041 2190 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2191 continue;
2192 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2193 }
2194 }
2195}
2196
1da177e4
LT		 2197#ifdef CONFIG_NET_POLL_CONTROLLER
2198/*
2199 * Polling 'interrupt' - used by things like netconsole to send skbs
2200 * without having to re-enable interrupts. It's not called while
2201 * the interrupt routine is executing.
2202 */
2203
2204static void ixgb_netpoll(struct net_device *dev)
2205{
f990b426 2206 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2207
1da177e4 2208 disable_irq(adapter->pdev->irq);
7d12e780 2209 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2210 enable_irq(adapter->pdev->irq);
2211}
2212#endif
2213
01748fbb
LV		 2214/**
2215 * ixgb_io_error_detected() - called when PCI error is detected
2216 * @pdev pointer to pci device with error
2217 * @state pci channel state after error
2218 *
2219 * This callback is called by the PCI subsystem whenever
2220 * a PCI bus error is detected.
2221 */
0060c072
JB		 2222static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2223 enum pci_channel_state state)
01748fbb
LV		 2224{
2225 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2226 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2227
03f83041 2228 if (netif_running(netdev))
446490ca 2229 ixgb_down(adapter, true);
01748fbb
LV		 2230
2231 pci_disable_device(pdev);
2232
2233 /* Request a slot reset. */
2234 return PCI_ERS_RESULT_NEED_RESET;
2235}
2236
2237/**
2238 * ixgb_io_slot_reset - called after the pci bus has been reset.
2239 * @pdev pointer to pci device with error
2240 *
52035bdb 2241 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2242 * Basically, this tries to restart the card from scratch.
2243 * This is a shortened version of the device probe/discovery code,
2244 * it resembles the first-half of the ixgb_probe() routine.
2245 */
0060c072 2246static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2247{
2248 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2249 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2250
03f83041 2251 if (pci_enable_device(pdev)) {
01748fbb
LV		 2252 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2253 return PCI_ERS_RESULT_DISCONNECT;
2254 }
2255
2256 /* Perform card reset only on one instance of the card */
2257 if (0 != PCI_FUNC (pdev->devfn))
2258 return PCI_ERS_RESULT_RECOVERED;
2259
2260 pci_set_master(pdev);
2261
2262 netif_carrier_off(netdev);
2263 netif_stop_queue(netdev);
2264 ixgb_reset(adapter);
2265
2266 /* Make sure the EEPROM is good */
03f83041 2267 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
01748fbb
LV		 2268 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2269 return PCI_ERS_RESULT_DISCONNECT;
2270 }
2271 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2272 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2273
03f83041 2274 if (!is_valid_ether_addr(netdev->perm_addr)) {
01748fbb
LV		 2275 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2276 return PCI_ERS_RESULT_DISCONNECT;
2277 }
2278
2279 return PCI_ERS_RESULT_RECOVERED;
2280}
2281
2282/**
2283 * ixgb_io_resume - called when its OK to resume normal operations
2284 * @pdev pointer to pci device with error
2285 *
2286 * The error recovery driver tells us that its OK to resume
2287 * normal operation. Implementation resembles the second-half
2288 * of the ixgb_probe() routine.
2289 */
0060c072 2290static void ixgb_io_resume(struct pci_dev *pdev)
01748fbb
LV		 2291{
2292 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2293 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2294
2295 pci_set_master(pdev);
2296
03f83041
JB		 2297 if (netif_running(netdev)) {
2298 if (ixgb_up(adapter)) {
01748fbb
LV		 2299 printk ("ixgb: can't bring device back up after reset\n");
2300 return;
2301 }
2302 }
2303
2304 netif_device_attach(netdev);
2305 mod_timer(&adapter->watchdog_timer, jiffies);
2306}
2307
1da177e4 2308/* ixgb_main.c */
kernel source for telekom puls (alcatel/mediatek)