]> bbs.cooldavid.org Git - net-next-2.6.git/blame - drivers/net/ixgb/ixgb_main.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[net-next-2.6.git] / drivers / net / ixgb / ixgb_main.c
CommitLineData
1da177e4
LT		 1/*******************************************************************************
2
0abb6eb1 3 Intel PRO/10GbE Linux driver
f731a9ef 4 Copyright(c) 1999 - 2008 Intel Corporation.
0abb6eb1
AK		 5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
1da177e4 13 more details.
0abb6eb1 14
1da177e4 15 You should have received a copy of the GNU General Public License along with
0abb6eb1
AK		 16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
1da177e4
LT		 22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
0abb6eb1 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
1da177e4
LT		 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
d328bc83
JP		 29#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
1da177e4
LT		 31#include "ixgb.h"
32
1da177e4 33char ixgb_driver_name[] = "ixgb";
e9ab1d14 34static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
1da177e4 35
1da177e4 36#define DRIVERNAPI "-NAPI"
f731a9ef 37#define DRV_VERSION "1.0.135-k2" DRIVERNAPI
273dc74e 38const char ixgb_driver_version[] = DRV_VERSION;
f731a9ef 39static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation.";
1da177e4 40
d9fed18b
JB		 41#define IXGB_CB_LENGTH 256
42static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
43module_param(copybreak, uint, 0644);
44MODULE_PARM_DESC(copybreak,
45 "Maximum size of packet that is copied to a new buffer on receive");
46
1da177e4
LT		 47/* ixgb_pci_tbl - PCI Device ID Table
48 *
49 * Wildcard entries (PCI_ANY_ID) should come last
50 * Last entry must be all 0s
51 *
52 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
53 * Class, Class Mask, private data (not used) }
54 */
a3aa1884 55static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl) = {
1da177e4
LT		 56 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
57 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
940829e2
AK		 58 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
59 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1da177e4
LT		 60 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
61 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
7490d71a 62 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
1da177e4
LT		 63 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
64
65 /* required last entry */
66 {0,}
67};
68
69MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
70
71/* Local Function Prototypes */
1da177e4
LT		 72static int ixgb_init_module(void);
73static void ixgb_exit_module(void);
74static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
75static void __devexit ixgb_remove(struct pci_dev *pdev);
76static int ixgb_sw_init(struct ixgb_adapter *adapter);
77static int ixgb_open(struct net_device *netdev);
78static int ixgb_close(struct net_device *netdev);
79static void ixgb_configure_tx(struct ixgb_adapter *adapter);
80static void ixgb_configure_rx(struct ixgb_adapter *adapter);
81static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
82static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
83static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
84static void ixgb_set_multi(struct net_device *netdev);
85static void ixgb_watchdog(unsigned long data);
3b29a56d
SH		 86static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb,
87 struct net_device *netdev);
1da177e4
LT		 88static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
89static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
90static int ixgb_set_mac(struct net_device *netdev, void *p);
7d12e780 91static irqreturn_t ixgb_intr(int irq, void *data);
446490ca 92static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
ac79c82e 93
7490d71a
JB		 94static int ixgb_clean(struct napi_struct *, int);
95static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
fc2d14e3 96static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);
7490d71a 97
1da177e4 98static void ixgb_tx_timeout(struct net_device *dev);
c4028958 99static void ixgb_tx_timeout_task(struct work_struct *work);
7490d71a 100
1da177e4 101static void ixgb_vlan_rx_register(struct net_device *netdev,
7490d71a 102 struct vlan_group *grp);
222441a6
JP		 103static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
104static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
1da177e4
LT		 105static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
106
1da177e4
LT		 107#ifdef CONFIG_NET_POLL_CONTROLLER
108/* for netdump / net console */
109static void ixgb_netpoll(struct net_device *dev);
110#endif
111
01748fbb 112static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
7490d71a 113 enum pci_channel_state state);
01748fbb
LV		 114static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
115static void ixgb_io_resume (struct pci_dev *pdev);
1da177e4 116
01748fbb
LV		 117static struct pci_error_handlers ixgb_err_handler = {
118 .error_detected = ixgb_io_error_detected,
119 .slot_reset = ixgb_io_slot_reset,
120 .resume = ixgb_io_resume,
121};
122
1da177e4 123static struct pci_driver ixgb_driver = {
c2eba932 124 .name = ixgb_driver_name,
1da177e4 125 .id_table = ixgb_pci_tbl,
c2eba932
MC		 126 .probe = ixgb_probe,
127 .remove = __devexit_p(ixgb_remove),
01748fbb 128 .err_handler = &ixgb_err_handler
1da177e4
LT		 129};
130
131MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
132MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
133MODULE_LICENSE("GPL");
01e5abc2 134MODULE_VERSION(DRV_VERSION);
1da177e4 135
ec9c3f5d
AK		 136#define DEFAULT_DEBUG_LEVEL_SHIFT 3
137static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
138module_param(debug, int, 0);
139MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
140
1da177e4
LT		 141/**
142 * ixgb_init_module - Driver Registration Routine
143 *
144 * ixgb_init_module is the first routine called when the driver is
145 * loaded. All it does is register with the PCI subsystem.
146 **/
147
148static int __init
149ixgb_init_module(void)
150{
d328bc83
JP		 151 pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version);
152 pr_info("%s\n", ixgb_copyright);
1da177e4 153
29917620 154 return pci_register_driver(&ixgb_driver);
1da177e4
LT		 155}
156
157module_init(ixgb_init_module);
158
159/**
160 * ixgb_exit_module - Driver Exit Cleanup Routine
161 *
162 * ixgb_exit_module is called just before the driver is removed
163 * from memory.
164 **/
165
166static void __exit
167ixgb_exit_module(void)
168{
1da177e4
LT		 169 pci_unregister_driver(&ixgb_driver);
170}
171
172module_exit(ixgb_exit_module);
173
174/**
175 * ixgb_irq_disable - Mask off interrupt generation on the NIC
176 * @adapter: board private structure
177 **/
178
235949d1 179static void
1da177e4
LT		 180ixgb_irq_disable(struct ixgb_adapter *adapter)
181{
1da177e4
LT		 182 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
183 IXGB_WRITE_FLUSH(&adapter->hw);
184 synchronize_irq(adapter->pdev->irq);
185}
186
187/**
188 * ixgb_irq_enable - Enable default interrupt generation settings
189 * @adapter: board private structure
190 **/
191
235949d1 192static void
1da177e4
LT		 193ixgb_irq_enable(struct ixgb_adapter *adapter)
194{
9c61a9dc
JB		 195 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
196 IXGB_INT_TXDW | IXGB_INT_LSC;
197 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
198 val |= IXGB_INT_GPI0;
199 IXGB_WRITE_REG(&adapter->hw, IMS, val);
200 IXGB_WRITE_FLUSH(&adapter->hw);
1da177e4
LT		 201}
202
203int
204ixgb_up(struct ixgb_adapter *adapter)
205{
206 struct net_device *netdev = adapter->netdev;
fb136c07 207 int err, irq_flags = IRQF_SHARED;
1da177e4
LT		 208 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
209 struct ixgb_hw *hw = &adapter->hw;
210
211 /* hardware has been reset, we need to reload some things */
212
8556f0d1 213 ixgb_rar_set(hw, netdev->dev_addr, 0);
1da177e4
LT		 214 ixgb_set_multi(netdev);
215
216 ixgb_restore_vlan(adapter);
217
218 ixgb_configure_tx(adapter);
219 ixgb_setup_rctl(adapter);
220 ixgb_configure_rx(adapter);
fc2d14e3 221 ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));
1da177e4 222
e59d1696
AK		 223 /* disable interrupts and get the hardware into a known state */
224 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
225
fb136c07
AK		 226 /* only enable MSI if bus is in PCI-X mode */
227 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
228 err = pci_enable_msi(adapter->pdev);
229 if (!err) {
230 adapter->have_msi = 1;
231 irq_flags = 0;
232 }
1da177e4
LT		 233 /* proceed to try to request regular interrupt */
234 }
1da177e4 235
a0607fd3 236 err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags,
fb136c07
AK		 237 netdev->name, netdev);
238 if (err) {
239 if (adapter->have_msi)
240 pci_disable_msi(adapter->pdev);
6909c66d
JP		 241 netif_err(adapter, probe, adapter->netdev,
242 "Unable to allocate interrupt Error: %d\n", err);
1da177e4 243 return err;
ec9c3f5d 244 }
1da177e4 245
03f83041 246 if ((hw->max_frame_size != max_frame) ||
1da177e4
LT		 247 (hw->max_frame_size !=
248 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
249
250 hw->max_frame_size = max_frame;
251
252 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
253
03f83041 254 if (hw->max_frame_size >
1da177e4 255 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
222441a6 256 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
1da177e4 257
03f83041 258 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
1da177e4
LT		 259 ctrl0 |= IXGB_CTRL0_JFE;
260 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
261 }
262 }
263 }
264
bab2bce7 265 clear_bit(__IXGB_DOWN, &adapter->flags);
1da177e4 266
bea3348e 267 napi_enable(&adapter->napi);
e59d1696
AK		 268 ixgb_irq_enable(adapter);
269
4cb9be7a
JB		 270 netif_wake_queue(netdev);
271
bab2bce7
JB		 272 mod_timer(&adapter->watchdog_timer, jiffies);
273
1da177e4
LT		 274 return 0;
275}
276
277void
446490ca 278ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
1da177e4
LT		 279{
280 struct net_device *netdev = adapter->netdev;
281
bab2bce7
JB		 282 /* prevent the interrupt handler from restarting watchdog */
283 set_bit(__IXGB_DOWN, &adapter->flags);
284
49d85c50 285 napi_disable(&adapter->napi);
bab2bce7 286 /* waiting for NAPI to complete can re-enable interrupts */
1da177e4
LT		 287 ixgb_irq_disable(adapter);
288 free_irq(adapter->pdev->irq, netdev);
fb136c07
AK		 289
290 if (adapter->have_msi)
1da177e4
LT		 291 pci_disable_msi(adapter->pdev);
292
03f83041 293 if (kill_watchdog)
1da177e4 294 del_timer_sync(&adapter->watchdog_timer);
49d85c50 295
1da177e4
LT		 296 adapter->link_speed = 0;
297 adapter->link_duplex = 0;
298 netif_carrier_off(netdev);
299 netif_stop_queue(netdev);
300
301 ixgb_reset(adapter);
302 ixgb_clean_tx_ring(adapter);
303 ixgb_clean_rx_ring(adapter);
304}
305
306void
307ixgb_reset(struct ixgb_adapter *adapter)
308{
3fd7131f 309 struct ixgb_hw *hw = &adapter->hw;
1da177e4 310
3fd7131f
MW		 311 ixgb_adapter_stop(hw);
312 if (!ixgb_init_hw(hw))
6909c66d 313 netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n");
3fd7131f
MW		 314
315 /* restore frame size information */
316 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
317 if (hw->max_frame_size >
318 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
319 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
320 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
321 ctrl0 |= IXGB_CTRL0_JFE;
322 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
323 }
324 }
1da177e4
LT		 325}
326
0edc3527
SH		 327static const struct net_device_ops ixgb_netdev_ops = {
328 .ndo_open = ixgb_open,
329 .ndo_stop = ixgb_close,
00829823 330 .ndo_start_xmit = ixgb_xmit_frame,
0edc3527
SH		 331 .ndo_get_stats = ixgb_get_stats,
332 .ndo_set_multicast_list = ixgb_set_multi,
333 .ndo_validate_addr = eth_validate_addr,
334 .ndo_set_mac_address = ixgb_set_mac,
335 .ndo_change_mtu = ixgb_change_mtu,
336 .ndo_tx_timeout = ixgb_tx_timeout,
337 .ndo_vlan_rx_register = ixgb_vlan_rx_register,
338 .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid,
339 .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid,
340#ifdef CONFIG_NET_POLL_CONTROLLER
341 .ndo_poll_controller = ixgb_netpoll,
342#endif
343};
344
1da177e4
LT		 345/**
346 * ixgb_probe - Device Initialization Routine
347 * @pdev: PCI device information struct
348 * @ent: entry in ixgb_pci_tbl
349 *
350 * Returns 0 on success, negative on failure
351 *
352 * ixgb_probe initializes an adapter identified by a pci_dev structure.
353 * The OS initialization, configuring of the adapter private structure,
354 * and a hardware reset occur.
355 **/
356
357static int __devinit
0060c072 358ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 359{
360 struct net_device *netdev = NULL;
361 struct ixgb_adapter *adapter;
362 static int cards_found = 0;
1da177e4
LT		 363 int pci_using_dac;
364 int i;
365 int err;
366
9e7bd330
JB		 367 err = pci_enable_device(pdev);
368 if (err)
1da177e4
LT		 369 return err;
370
47631f85
NN		 371 pci_using_dac = 0;
372 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
373 if (!err) {
374 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
375 if (!err)
376 pci_using_dac = 1;
1da177e4 377 } else {
47631f85
NN		 378 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
379 if (err) {
380 err = dma_set_coherent_mask(&pdev->dev,
381 DMA_BIT_MASK(32));
382 if (err) {
383 pr_err("No usable DMA configuration, aborting\n");
384 goto err_dma_mask;
385 }
1da177e4 386 }
1da177e4
LT		 387 }
388
9e7bd330
JB		 389 err = pci_request_regions(pdev, ixgb_driver_name);
390 if (err)
c91e468a 391 goto err_request_regions;
1da177e4
LT		 392
393 pci_set_master(pdev);
394
395 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
03f83041 396 if (!netdev) {
1da177e4
LT		 397 err = -ENOMEM;
398 goto err_alloc_etherdev;
399 }
400
1da177e4
LT		 401 SET_NETDEV_DEV(netdev, &pdev->dev);
402
403 pci_set_drvdata(pdev, netdev);
8908c6cd 404 adapter = netdev_priv(netdev);
1da177e4
LT		 405 adapter->netdev = netdev;
406 adapter->pdev = pdev;
407 adapter->hw.back = adapter;
ec9c3f5d 408 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
1da177e4 409
275f165f 410 adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
e539e466 411 if (!adapter->hw.hw_addr) {
1da177e4
LT		 412 err = -EIO;
413 goto err_ioremap;
414 }
415
1459336d 416 for (i = BAR_1; i <= BAR_5; i++) {
03f83041 417 if (pci_resource_len(pdev, i) == 0)
1da177e4 418 continue;
03f83041 419 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 420 adapter->hw.io_base = pci_resource_start(pdev, i);
421 break;
422 }
423 }
424
0edc3527 425 netdev->netdev_ops = &ixgb_netdev_ops;
1da177e4 426 ixgb_set_ethtool_ops(netdev);
9b8118df 427 netdev->watchdog_timeo = 5 * HZ;
bea3348e 428 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4 429
0eb5a34c 430 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 431
432 adapter->bd_number = cards_found;
433 adapter->link_speed = 0;
434 adapter->link_duplex = 0;
435
436 /* setup the private structure */
437
9e7bd330
JB		 438 err = ixgb_sw_init(adapter);
439 if (err)
1da177e4
LT		 440 goto err_sw_init;
441
442 netdev->features = NETIF_F_SG |
443 NETIF_F_HW_CSUM |
444 NETIF_F_HW_VLAN_TX |
445 NETIF_F_HW_VLAN_RX |
446 NETIF_F_HW_VLAN_FILTER;
1da177e4 447 netdev->features |= NETIF_F_TSO;
1da177e4 448
7b872a55 449 if (pci_using_dac) {
1da177e4 450 netdev->features |= NETIF_F_HIGHDMA;
7b872a55
YZ		 451 netdev->vlan_features |= NETIF_F_HIGHDMA;
452 }
1da177e4
LT		 453
454 /* make sure the EEPROM is good */
455
03f83041 456 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
6909c66d
JP		 457 netif_err(adapter, probe, adapter->netdev,
458 "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 459 err = -EIO;
460 goto err_eeprom;
461 }
462
463 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
df859c51 464 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1da177e4 465
03f83041 466 if (!is_valid_ether_addr(netdev->perm_addr)) {
6909c66d 467 netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n");
1da177e4
LT		 468 err = -EIO;
469 goto err_eeprom;
470 }
471
472 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
473
474 init_timer(&adapter->watchdog_timer);
c061b18d 475 adapter->watchdog_timer.function = ixgb_watchdog;
1da177e4
LT		 476 adapter->watchdog_timer.data = (unsigned long)adapter;
477
c4028958 478 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 479
ec9c3f5d 480 strcpy(netdev->name, "eth%d");
9e7bd330
JB		 481 err = register_netdev(netdev);
482 if (err)
1da177e4
LT		 483 goto err_register;
484
3a6d1bc4 485 /* carrier off reporting is important to ethtool even BEFORE open */
1da177e4 486 netif_carrier_off(netdev);
1da177e4 487
6909c66d
JP		 488 netif_info(adapter, probe, adapter->netdev,
489 "Intel(R) PRO/10GbE Network Connection\n");
1da177e4
LT		 490 ixgb_check_options(adapter);
491 /* reset the hardware with the new settings */
492
493 ixgb_reset(adapter);
494
495 cards_found++;
496 return 0;
497
498err_register:
499err_sw_init:
500err_eeprom:
501 iounmap(adapter->hw.hw_addr);
502err_ioremap:
503 free_netdev(netdev);
504err_alloc_etherdev:
505 pci_release_regions(pdev);
c91e468a
AS		 506err_request_regions:
507err_dma_mask:
508 pci_disable_device(pdev);
1da177e4
LT		 509 return err;
510}
511
512/**
513 * ixgb_remove - Device Removal Routine
514 * @pdev: PCI device information struct
515 *
516 * ixgb_remove is called by the PCI subsystem to alert the driver
517 * that it should release a PCI device. The could be caused by a
518 * Hot-Plug event, or because the driver is going to be removed from
519 * memory.
520 **/
521
522static void __devexit
523ixgb_remove(struct pci_dev *pdev)
524{
525 struct net_device *netdev = pci_get_drvdata(pdev);
8908c6cd 526 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 527
12579697
JB		 528 flush_scheduled_work();
529
1da177e4
LT		 530 unregister_netdev(netdev);
531
532 iounmap(adapter->hw.hw_addr);
533 pci_release_regions(pdev);
534
535 free_netdev(netdev);
ec43a81c 536 pci_disable_device(pdev);
1da177e4
LT		 537}
538
539/**
540 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
541 * @adapter: board private structure to initialize
542 *
543 * ixgb_sw_init initializes the Adapter private data structure.
544 * Fields are initialized based on PCI device information and
545 * OS network device settings (MTU size).
546 **/
547
548static int __devinit
549ixgb_sw_init(struct ixgb_adapter *adapter)
550{
551 struct ixgb_hw *hw = &adapter->hw;
552 struct net_device *netdev = adapter->netdev;
553 struct pci_dev *pdev = adapter->pdev;
554
555 /* PCI config space info */
556
557 hw->vendor_id = pdev->vendor;
558 hw->device_id = pdev->device;
559 hw->subsystem_vendor_id = pdev->subsystem_vendor;
560 hw->subsystem_id = pdev->subsystem_device;
561
1da177e4 562 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
a3dc3da0 563 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
1da177e4 564
6909c66d
JP		 565 if ((hw->device_id == IXGB_DEVICE_ID_82597EX) ||
566 (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) ||
567 (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) ||
568 (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
0060c072 569 hw->mac_type = ixgb_82597;
1da177e4
LT		 570 else {
571 /* should never have loaded on this device */
6909c66d 572 netif_err(adapter, probe, adapter->netdev, "unsupported device id\n");
1da177e4
LT		 573 }
574
575 /* enable flow control to be programmed */
576 hw->fc.send_xon = 1;
577
bab2bce7 578 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 579 return 0;
580}
581
582/**
583 * ixgb_open - Called when a network interface is made active
584 * @netdev: network interface device structure
585 *
586 * Returns 0 on success, negative value on failure
587 *
588 * The open entry point is called when a network interface is made
589 * active by the system (IFF_UP). At this point all resources needed
590 * for transmit and receive operations are allocated, the interrupt
591 * handler is registered with the OS, the watchdog timer is started,
592 * and the stack is notified that the interface is ready.
593 **/
594
595static int
596ixgb_open(struct net_device *netdev)
597{
8908c6cd 598 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 599 int err;
600
601 /* allocate transmit descriptors */
9e7bd330
JB		 602 err = ixgb_setup_tx_resources(adapter);
603 if (err)
1da177e4
LT		 604 goto err_setup_tx;
605
3a6d1bc4
JB		 606 netif_carrier_off(netdev);
607
1da177e4
LT		 608 /* allocate receive descriptors */
609
9e7bd330
JB		 610 err = ixgb_setup_rx_resources(adapter);
611 if (err)
1da177e4
LT		 612 goto err_setup_rx;
613
9e7bd330
JB		 614 err = ixgb_up(adapter);
615 if (err)
1da177e4
LT		 616 goto err_up;
617
3a6d1bc4
JB		 618 netif_start_queue(netdev);
619
1da177e4
LT		 620 return 0;
621
622err_up:
623 ixgb_free_rx_resources(adapter);
624err_setup_rx:
625 ixgb_free_tx_resources(adapter);
626err_setup_tx:
627 ixgb_reset(adapter);
628
629 return err;
630}
631
632/**
633 * ixgb_close - Disables a network interface
634 * @netdev: network interface device structure
635 *
636 * Returns 0, this is not allowed to fail
637 *
638 * The close entry point is called when an interface is de-activated
639 * by the OS. The hardware is still under the drivers control, but
640 * needs to be disabled. A global MAC reset is issued to stop the
641 * hardware, and all transmit and receive resources are freed.
642 **/
643
644static int
645ixgb_close(struct net_device *netdev)
646{
8908c6cd 647 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 648
446490ca 649 ixgb_down(adapter, true);
1da177e4
LT		 650
651 ixgb_free_tx_resources(adapter);
652 ixgb_free_rx_resources(adapter);
653
654 return 0;
655}
656
657/**
658 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
659 * @adapter: board private structure
660 *
661 * Return 0 on success, negative on failure
662 **/
663
664int
665ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
666{
667 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
668 struct pci_dev *pdev = adapter->pdev;
669 int size;
670
671 size = sizeof(struct ixgb_buffer) * txdr->count;
672 txdr->buffer_info = vmalloc(size);
03f83041 673 if (!txdr->buffer_info) {
6909c66d
JP		 674 netif_err(adapter, probe, adapter->netdev,
675 "Unable to allocate transmit descriptor ring memory\n");
1da177e4
LT		 676 return -ENOMEM;
677 }
678 memset(txdr->buffer_info, 0, size);
679
680 /* round up to nearest 4K */
681
682 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 683 txdr->size = ALIGN(txdr->size, 4096);
1da177e4 684
47631f85
NN		 685 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
686 GFP_KERNEL);
03f83041 687 if (!txdr->desc) {
1da177e4 688 vfree(txdr->buffer_info);
6909c66d
JP		 689 netif_err(adapter, probe, adapter->netdev,
690 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 691 return -ENOMEM;
692 }
693 memset(txdr->desc, 0, txdr->size);
694
695 txdr->next_to_use = 0;
696 txdr->next_to_clean = 0;
697
698 return 0;
699}
700
701/**
702 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
703 * @adapter: board private structure
704 *
705 * Configure the Tx unit of the MAC after a reset.
706 **/
707
708static void
709ixgb_configure_tx(struct ixgb_adapter *adapter)
710{
222441a6
JP		 711 u64 tdba = adapter->tx_ring.dma;
712 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
713 u32 tctl;
1da177e4
LT		 714 struct ixgb_hw *hw = &adapter->hw;
715
0060c072
JB		 716 /* Setup the Base and Length of the Tx Descriptor Ring
717 * tx_ring.dma can be either a 32 or 64 bit value
1da177e4
LT		 718 */
719
720 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
721 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
722
723 IXGB_WRITE_REG(hw, TDLEN, tdlen);
724
725 /* Setup the HW Tx Head and Tail descriptor pointers */
726
727 IXGB_WRITE_REG(hw, TDH, 0);
728 IXGB_WRITE_REG(hw, TDT, 0);
729
730 /* don't set up txdctl, it induces performance problems if configured
731 * incorrectly */
732 /* Set the Tx Interrupt Delay register */
733
734 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
735
736 /* Program the Transmit Control Register */
737
738 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
739 IXGB_WRITE_REG(hw, TCTL, tctl);
740
741 /* Setup Transmit Descriptor Settings for this adapter */
742 adapter->tx_cmd_type =
0060c072
JB		 743 IXGB_TX_DESC_TYPE |
744 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
1da177e4
LT		 745}
746
747/**
748 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
749 * @adapter: board private structure
750 *
751 * Returns 0 on success, negative on failure
752 **/
753
754int
755ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
756{
757 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
758 struct pci_dev *pdev = adapter->pdev;
759 int size;
760
761 size = sizeof(struct ixgb_buffer) * rxdr->count;
762 rxdr->buffer_info = vmalloc(size);
03f83041 763 if (!rxdr->buffer_info) {
6909c66d
JP		 764 netif_err(adapter, probe, adapter->netdev,
765 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 766 return -ENOMEM;
767 }
768 memset(rxdr->buffer_info, 0, size);
769
770 /* Round up to nearest 4K */
771
772 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 773 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4 774
47631f85
NN		 775 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
776 GFP_KERNEL);
1da177e4 777
03f83041 778 if (!rxdr->desc) {
1da177e4 779 vfree(rxdr->buffer_info);
6909c66d
JP		 780 netif_err(adapter, probe, adapter->netdev,
781 "Unable to allocate receive descriptors\n");
1da177e4
LT		 782 return -ENOMEM;
783 }
784 memset(rxdr->desc, 0, rxdr->size);
785
786 rxdr->next_to_clean = 0;
787 rxdr->next_to_use = 0;
788
789 return 0;
790}
791
792/**
793 * ixgb_setup_rctl - configure the receive control register
794 * @adapter: Board private structure
795 **/
796
797static void
798ixgb_setup_rctl(struct ixgb_adapter *adapter)
799{
222441a6 800 u32 rctl;
1da177e4
LT		 801
802 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
803
804 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
805
806 rctl |=
0060c072
JB		 807 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
808 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
1da177e4
LT		 809 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
810
811 rctl |= IXGB_RCTL_SECRC;
812
3f3dc0dd 813 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 814 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 815 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 816 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 817 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 818 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 819 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 820 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 821
822 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
823}
824
825/**
826 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
827 * @adapter: board private structure
828 *
829 * Configure the Rx unit of the MAC after a reset.
830 **/
831
832static void
833ixgb_configure_rx(struct ixgb_adapter *adapter)
834{
222441a6
JP		 835 u64 rdba = adapter->rx_ring.dma;
836 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 837 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 838 u32 rctl;
839 u32 rxcsum;
1da177e4
LT		 840
841 /* make sure receives are disabled while setting up the descriptors */
842
843 rctl = IXGB_READ_REG(hw, RCTL);
844 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
845
846 /* set the Receive Delay Timer Register */
847
848 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
849
850 /* Setup the Base and Length of the Rx Descriptor Ring */
851
852 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
853 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
854
855 IXGB_WRITE_REG(hw, RDLEN, rdlen);
856
857 /* Setup the HW Rx Head and Tail Descriptor Pointers */
858 IXGB_WRITE_REG(hw, RDH, 0);
859 IXGB_WRITE_REG(hw, RDT, 0);
860
4360386f
JB		 861 /* due to the hardware errata with RXDCTL, we are unable to use any of
862 * the performance enhancing features of it without causing other
863 * subtle bugs, some of the bugs could include receive length
864 * corruption at high data rates (WTHRESH > 0) and/or receive
865 * descriptor ring irregularites (particularly in hardware cache) */
866 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 867
868 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 869 if (adapter->rx_csum) {
1da177e4
LT		 870 rxcsum = IXGB_READ_REG(hw, RXCSUM);
871 rxcsum |= IXGB_RXCSUM_TUOFL;
872 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
873 }
874
875 /* Enable Receives */
876
877 IXGB_WRITE_REG(hw, RCTL, rctl);
878}
879
880/**
881 * ixgb_free_tx_resources - Free Tx Resources
882 * @adapter: board private structure
883 *
884 * Free all transmit software resources
885 **/
886
887void
888ixgb_free_tx_resources(struct ixgb_adapter *adapter)
889{
890 struct pci_dev *pdev = adapter->pdev;
891
892 ixgb_clean_tx_ring(adapter);
893
894 vfree(adapter->tx_ring.buffer_info);
895 adapter->tx_ring.buffer_info = NULL;
896
47631f85
NN		 897 dma_free_coherent(&pdev->dev, adapter->tx_ring.size,
898 adapter->tx_ring.desc, adapter->tx_ring.dma);
1da177e4
LT		 899
900 adapter->tx_ring.desc = NULL;
901}
902
235949d1 903static void
1da177e4 904ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
0060c072 905 struct ixgb_buffer *buffer_info)
1da177e4 906{
adeaa908
AD		 907 if (buffer_info->dma) {
908 if (buffer_info->mapped_as_page)
47631f85
NN		 909 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
910 buffer_info->length, DMA_TO_DEVICE);
adeaa908 911 else
47631f85
NN		 912 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
913 buffer_info->length, DMA_TO_DEVICE);
adeaa908
AD		 914 buffer_info->dma = 0;
915 }
916
fe52eeb8 917 if (buffer_info->skb) {
fe52eeb8
AD		 918 dev_kfree_skb_any(buffer_info->skb);
919 buffer_info->skb = NULL;
920 }
1dfdd7df
AK		 921 buffer_info->time_stamp = 0;
922 /* these fields must always be initialized in tx
923 * buffer_info->length = 0;
924 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 925}
926
927/**
928 * ixgb_clean_tx_ring - Free Tx Buffers
929 * @adapter: board private structure
930 **/
931
932static void
933ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
934{
935 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
936 struct ixgb_buffer *buffer_info;
937 unsigned long size;
938 unsigned int i;
939
940 /* Free all the Tx ring sk_buffs */
941
1459336d 942 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 943 buffer_info = &tx_ring->buffer_info[i];
944 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
945 }
946
947 size = sizeof(struct ixgb_buffer) * tx_ring->count;
948 memset(tx_ring->buffer_info, 0, size);
949
950 /* Zero out the descriptor ring */
951
952 memset(tx_ring->desc, 0, tx_ring->size);
953
954 tx_ring->next_to_use = 0;
955 tx_ring->next_to_clean = 0;
956
957 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
958 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
959}
960
961/**
962 * ixgb_free_rx_resources - Free Rx Resources
963 * @adapter: board private structure
964 *
965 * Free all receive software resources
966 **/
967
968void
969ixgb_free_rx_resources(struct ixgb_adapter *adapter)
970{
971 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
972 struct pci_dev *pdev = adapter->pdev;
973
974 ixgb_clean_rx_ring(adapter);
975
976 vfree(rx_ring->buffer_info);
977 rx_ring->buffer_info = NULL;
978
47631f85
NN		 979 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
980 rx_ring->dma);
1da177e4
LT		 981
982 rx_ring->desc = NULL;
983}
984
985/**
986 * ixgb_clean_rx_ring - Free Rx Buffers
987 * @adapter: board private structure
988 **/
989
990static void
991ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
992{
993 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
994 struct ixgb_buffer *buffer_info;
995 struct pci_dev *pdev = adapter->pdev;
996 unsigned long size;
997 unsigned int i;
998
999 /* Free all the Rx ring sk_buffs */
1000
1459336d 1001 for (i = 0; i < rx_ring->count; i++) {
1da177e4 1002 buffer_info = &rx_ring->buffer_info[i];
23e55a32 1003 if (buffer_info->dma) {
47631f85 1004 dma_unmap_single(&pdev->dev,
1da177e4
LT		 1005 buffer_info->dma,
1006 buffer_info->length,
47631f85 1007 DMA_FROM_DEVICE);
23e55a32
BJ		 1008 buffer_info->dma = 0;
1009 buffer_info->length = 0;
1010 }
1da177e4 1011
23e55a32 1012 if (buffer_info->skb) {
1da177e4 1013 dev_kfree_skb(buffer_info->skb);
1da177e4
LT		 1014 buffer_info->skb = NULL;
1015 }
1016 }
1017
1018 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1019 memset(rx_ring->buffer_info, 0, size);
1020
1021 /* Zero out the descriptor ring */
1022
1023 memset(rx_ring->desc, 0, rx_ring->size);
1024
1025 rx_ring->next_to_clean = 0;
1026 rx_ring->next_to_use = 0;
1027
1028 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1029 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1030}
1031
1032/**
1033 * ixgb_set_mac - Change the Ethernet Address of the NIC
1034 * @netdev: network interface device structure
1035 * @p: pointer to an address structure
1036 *
1037 * Returns 0 on success, negative on failure
1038 **/
1039
1040static int
1041ixgb_set_mac(struct net_device *netdev, void *p)
1042{
8908c6cd 1043 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1044 struct sockaddr *addr = p;
1045
03f83041 1046 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1047 return -EADDRNOTAVAIL;
1048
1049 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1050
1051 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1052
1053 return 0;
1054}
1055
1056/**
1057 * ixgb_set_multi - Multicast and Promiscuous mode set
1058 * @netdev: network interface device structure
1059 *
1060 * The set_multi entry point is called whenever the multicast address
1061 * list or the network interface flags are updated. This routine is
1062 * responsible for configuring the hardware for proper multicast,
1063 * promiscuous mode, and all-multi behavior.
1064 **/
1065
1066static void
1067ixgb_set_multi(struct net_device *netdev)
1068{
8908c6cd 1069 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1070 struct ixgb_hw *hw = &adapter->hw;
22bedad3 1071 struct netdev_hw_addr *ha;
222441a6 1072 u32 rctl;
1da177e4
LT		 1073 int i;
1074
1075 /* Check for Promiscuous and All Multicast modes */
1076
1077 rctl = IXGB_READ_REG(hw, RCTL);
1078
03f83041 1079 if (netdev->flags & IFF_PROMISC) {
1da177e4 1080 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
746b9f02 1081 rctl &= ~IXGB_RCTL_VFE;
1da177e4 1082 } else {
746b9f02
PM		 1083 if (netdev->flags & IFF_ALLMULTI) {
1084 rctl |= IXGB_RCTL_MPE;
1085 rctl &= ~IXGB_RCTL_UPE;
1086 } else {
1087 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1088 }
78ed11a5 1089 rctl |= IXGB_RCTL_VFE;
1da177e4
LT		 1090 }
1091
4cd24eaf 1092 if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1093 rctl |= IXGB_RCTL_MPE;
1094 IXGB_WRITE_REG(hw, RCTL, rctl);
1095 } else {
222441a6 1096 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1097 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1098
1099 IXGB_WRITE_REG(hw, RCTL, rctl);
1100
48e2f183 1101 i = 0;
22bedad3 1102 netdev_for_each_mc_addr(ha, netdev)
48e2f183 1103 memcpy(&mta[i++ * IXGB_ETH_LENGTH_OF_ADDRESS],
22bedad3 1104 ha->addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1da177e4 1105
4cd24eaf 1106 ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0);
1da177e4
LT		 1107 }
1108}
1109
1110/**
1111 * ixgb_watchdog - Timer Call-back
1112 * @data: pointer to netdev cast into an unsigned long
1113 **/
1114
1115static void
1116ixgb_watchdog(unsigned long data)
1117{
1118 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1119 struct net_device *netdev = adapter->netdev;
1120 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1121
1122 ixgb_check_for_link(&adapter->hw);
1123
1124 if (ixgb_check_for_bad_link(&adapter->hw)) {
1125 /* force the reset path */
1126 netif_stop_queue(netdev);
1127 }
1128
03f83041
JB		 1129 if (adapter->hw.link_up) {
1130 if (!netif_carrier_ok(netdev)) {
d328bc83
JP		 1131 netdev_info(netdev,
1132 "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
1133 (adapter->hw.fc.type == ixgb_fc_full) ?
1134 "RX/TX" :
1135 (adapter->hw.fc.type == ixgb_fc_rx_pause) ?
1136 "RX" :
1137 (adapter->hw.fc.type == ixgb_fc_tx_pause) ?
1138 "TX" : "None");
1da177e4
LT		 1139 adapter->link_speed = 10000;
1140 adapter->link_duplex = FULL_DUPLEX;
1141 netif_carrier_on(netdev);
1da177e4
LT		 1142 }
1143 } else {
03f83041 1144 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1145 adapter->link_speed = 0;
1146 adapter->link_duplex = 0;
d328bc83 1147 netdev_info(netdev, "NIC Link is Down\n");
1da177e4 1148 netif_carrier_off(netdev);
1da177e4
LT		 1149 }
1150 }
1151
1152 ixgb_update_stats(adapter);
1153
03f83041
JB		 1154 if (!netif_carrier_ok(netdev)) {
1155 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1156 /* We've lost link, so the controller stops DMA,
1157 * but we've got queued Tx work that's never going
1158 * to get done, so reset controller to flush Tx.
1159 * (Do the reset outside of interrupt context). */
1160 schedule_work(&adapter->tx_timeout_task);
c2d5ab49
JB		 1161 /* return immediately since reset is imminent */
1162 return;
1da177e4
LT		 1163 }
1164 }
1165
1166 /* Force detection of hung controller every watchdog period */
446490ca 1167 adapter->detect_tx_hung = true;
1da177e4
LT		 1168
1169 /* generate an interrupt to force clean up of any stragglers */
1170 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1171
1172 /* Reset the timer */
1173 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1174}
1175
1176#define IXGB_TX_FLAGS_CSUM 0x00000001
1177#define IXGB_TX_FLAGS_VLAN 0x00000002
1178#define IXGB_TX_FLAGS_TSO 0x00000004
1179
235949d1 1180static int
1da177e4
LT		 1181ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1182{
1da177e4
LT		 1183 struct ixgb_context_desc *context_desc;
1184 unsigned int i;
222441a6
JP		 1185 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1186 u16 ipcse, tucse, mss;
1da177e4
LT		 1187 int err;
1188
89114afd 1189 if (likely(skb_is_gso(skb))) {
adc54139 1190 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1191 struct iphdr *iph;
1192
1da177e4
LT		 1193 if (skb_header_cloned(skb)) {
1194 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1195 if (err)
1196 return err;
1197 }
1198
ab6a5bb6 1199 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1200 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1201 iph = ip_hdr(skb);
1202 iph->tot_len = 0;
1203 iph->check = 0;
aa8223c7
ACM		 1204 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1205 iph->daddr, 0,
1206 IPPROTO_TCP, 0);
bbe735e4 1207 ipcss = skb_network_offset(skb);
eddc9ec5 1208 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1209 ipcse = skb_transport_offset(skb) - 1;
1210 tucss = skb_transport_offset(skb);
aa8223c7 1211 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1212 tucse = 0;
1213
1214 i = adapter->tx_ring.next_to_use;
1215 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1216 buffer_info = &adapter->tx_ring.buffer_info[i];
1217 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1218
1219 context_desc->ipcss = ipcss;
1220 context_desc->ipcso = ipcso;
1221 context_desc->ipcse = cpu_to_le16(ipcse);
1222 context_desc->tucss = tucss;
1223 context_desc->tucso = tucso;
1224 context_desc->tucse = cpu_to_le16(tucse);
1225 context_desc->mss = cpu_to_le16(mss);
1226 context_desc->hdr_len = hdr_len;
1227 context_desc->status = 0;
1228 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1229 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1230 | IXGB_CONTEXT_DESC_CMD_TSE
1231 | IXGB_CONTEXT_DESC_CMD_IP
1232 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1233 | IXGB_CONTEXT_DESC_CMD_IDE
1234 | (skb->len - (hdr_len)));
1235
06c2f9ec 1236
03f83041 1237 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1238 adapter->tx_ring.next_to_use = i;
1239
1240 return 1;
1241 }
1da177e4
LT		 1242
1243 return 0;
1244}
1245
446490ca 1246static bool
1da177e4
LT		 1247ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1248{
1249 struct ixgb_context_desc *context_desc;
1250 unsigned int i;
222441a6 1251 u8 css, cso;
1da177e4 1252
03f83041 1253 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1254 struct ixgb_buffer *buffer_info;
ea2ae17d 1255 css = skb_transport_offset(skb);
ff1dcadb 1256 cso = css + skb->csum_offset;
1da177e4
LT		 1257
1258 i = adapter->tx_ring.next_to_use;
1259 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1260 buffer_info = &adapter->tx_ring.buffer_info[i];
1261 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1262
1263 context_desc->tucss = css;
1264 context_desc->tucso = cso;
1265 context_desc->tucse = 0;
1266 /* zero out any previously existing data in one instruction */
222441a6 1267 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1268 context_desc->status = 0;
1269 context_desc->hdr_len = 0;
1270 context_desc->mss = 0;
1271 context_desc->cmd_type_len =
1272 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1273 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1274
03f83041 1275 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1276 adapter->tx_ring.next_to_use = i;
1277
446490ca 1278 return true;
1da177e4
LT		 1279 }
1280
446490ca 1281 return false;
1da177e4
LT		 1282}
1283
1284#define IXGB_MAX_TXD_PWR 14
1285#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1286
235949d1 1287static int
1da177e4
LT		 1288ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1289 unsigned int first)
1290{
1291 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
adeaa908 1292 struct pci_dev *pdev = adapter->pdev;
1da177e4 1293 struct ixgb_buffer *buffer_info;
fe52eeb8 1294 int len = skb_headlen(skb);
1da177e4 1295 unsigned int offset = 0, size, count = 0, i;
5d927853 1296 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1297 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1298 unsigned int f;
1da177e4
LT		 1299
1300 i = tx_ring->next_to_use;
1301
9a432992 1302 while (len) {
1da177e4 1303 buffer_info = &tx_ring->buffer_info[i];
709cf018 1304 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1305 /* Workaround for premature desc write-backs
1306 * in TSO mode. Append 4-byte sentinel desc */
1307 if (unlikely(mss && !nr_frags && size == len && size > 8))
1308 size -= 4;
1309
1da177e4 1310 buffer_info->length = size;
adc54139 1311 WARN_ON(buffer_info->dma != 0);
34336635 1312 buffer_info->time_stamp = jiffies;
adeaa908 1313 buffer_info->mapped_as_page = false;
47631f85
NN		 1314 buffer_info->dma = dma_map_single(&pdev->dev,
1315 skb->data + offset,
1316 size, DMA_TO_DEVICE);
1317 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
adeaa908 1318 goto dma_error;
1dfdd7df 1319 buffer_info->next_to_watch = 0;
1da177e4
LT		 1320
1321 len -= size;
1322 offset += size;
1323 count++;
fe52eeb8
AD		 1324 if (len) {
1325 i++;
1326 if (i == tx_ring->count)
1327 i = 0;
1328 }
1da177e4
LT		 1329 }
1330
1459336d 1331 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 1332 struct skb_frag_struct *frag;
1333
1334 frag = &skb_shinfo(skb)->frags[f];
1335 len = frag->size;
adeaa908 1336 offset = frag->page_offset;
1da177e4 1337
9a432992 1338 while (len) {
fe52eeb8
AD		 1339 i++;
1340 if (i == tx_ring->count)
1341 i = 0;
1342
1da177e4 1343 buffer_info = &tx_ring->buffer_info[i];
709cf018 1344 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1345
1346 /* Workaround for premature desc write-backs
1347 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1348 if (unlikely(mss && (f == (nr_frags - 1))
1349 && size == len && size > 8))
5d927853
JB		 1350 size -= 4;
1351
1da177e4 1352 buffer_info->length = size;
34336635 1353 buffer_info->time_stamp = jiffies;
adeaa908
AD		 1354 buffer_info->mapped_as_page = true;
1355 buffer_info->dma =
47631f85
NN		 1356 dma_map_page(&pdev->dev, frag->page,
1357 offset, size, DMA_TO_DEVICE);
1358 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
adeaa908 1359 goto dma_error;
1dfdd7df 1360 buffer_info->next_to_watch = 0;
1da177e4
LT		 1361
1362 len -= size;
1363 offset += size;
1364 count++;
1da177e4
LT		 1365 }
1366 }
1da177e4
LT		 1367 tx_ring->buffer_info[i].skb = skb;
1368 tx_ring->buffer_info[first].next_to_watch = i;
1369
1370 return count;
adeaa908
AD		 1371
1372dma_error:
1373 dev_err(&pdev->dev, "TX DMA map failed\n");
1374 buffer_info->dma = 0;
c1fa347f 1375 if (count)
adeaa908 1376 count--;
c1fa347f
RK		 1377
1378 while (count--) {
1379 if (i==0)
adeaa908 1380 i += tx_ring->count;
c1fa347f 1381 i--;
adeaa908
AD		 1382 buffer_info = &tx_ring->buffer_info[i];
1383 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1384 }
1385
1386 return 0;
1da177e4
LT		 1387}
1388
235949d1 1389static void
1da177e4
LT		 1390ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1391{
1392 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1393 struct ixgb_tx_desc *tx_desc = NULL;
1394 struct ixgb_buffer *buffer_info;
222441a6
JP		 1395 u32 cmd_type_len = adapter->tx_cmd_type;
1396 u8 status = 0;
1397 u8 popts = 0;
1da177e4
LT		 1398 unsigned int i;
1399
03f83041 1400 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1401 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1402 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1403 }
1404
03f83041 1405 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1406 popts |= IXGB_TX_DESC_POPTS_TXSM;
1407
03f83041 1408 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1409 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1410
1411 i = tx_ring->next_to_use;
1412
9a432992 1413 while (count--) {
1da177e4
LT		 1414 buffer_info = &tx_ring->buffer_info[i];
1415 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1416 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1417 tx_desc->cmd_type_len =
1418 cpu_to_le32(cmd_type_len | buffer_info->length);
1419 tx_desc->status = status;
1420 tx_desc->popts = popts;
1421 tx_desc->vlan = cpu_to_le16(vlan_id);
1422
03f83041 1423 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1424 }
1425
0060c072
JB		 1426 tx_desc->cmd_type_len |=
1427 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1428
1429 /* Force memory writes to complete before letting h/w
1430 * know there are new descriptors to fetch. (Only
1431 * applicable for weak-ordered memory model archs,
1432 * such as IA-64). */
1433 wmb();
1434
1435 tx_ring->next_to_use = i;
1436 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1437}
1438
dfd341e4
JB		 1439static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1440{
1441 struct ixgb_adapter *adapter = netdev_priv(netdev);
1442 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1443
1444 netif_stop_queue(netdev);
1445 /* Herbert's original patch had:
1446 * smp_mb__after_netif_stop_queue();
1447 * but since that doesn't exist yet, just open code it. */
1448 smp_mb();
1449
1450 /* We need to check again in a case another CPU has just
1451 * made room available. */
1452 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1453 return -EBUSY;
1454
1455 /* A reprieve! */
1456 netif_start_queue(netdev);
1457 ++adapter->restart_queue;
1458 return 0;
1459}
1460
1461static int ixgb_maybe_stop_tx(struct net_device *netdev,
1462 struct ixgb_desc_ring *tx_ring, int size)
1463{
1464 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1465 return 0;
1466 return __ixgb_maybe_stop_tx(netdev, size);
1467}
1468
1469
1da177e4
LT		 1470/* Tx Descriptors needed, worst case */
1471#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1472 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1473#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1474 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1475 + 1 /* one more needed for sentinel TSO workaround */
1da177e4 1476
3b29a56d 1477static netdev_tx_t
1da177e4
LT		 1478ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1479{
8908c6cd 1480 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1481 unsigned int first;
1482 unsigned int tx_flags = 0;
1da177e4 1483 int vlan_id = 0;
fe52eeb8 1484 int count = 0;
1da177e4
LT		 1485 int tso;
1486
bab2bce7
JB		 1487 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1488 dev_kfree_skb(skb);
1489 return NETDEV_TX_OK;
1490 }
1491
03f83041 1492 if (skb->len <= 0) {
c2199340 1493 dev_kfree_skb(skb);
6ed10654 1494 return NETDEV_TX_OK;
1da177e4
LT		 1495 }
1496
dfd341e4 1497 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1498 DESC_NEEDED)))
f017f14b 1499 return NETDEV_TX_BUSY;
1da177e4 1500
03f83041 1501 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1da177e4
LT		 1502 tx_flags |= IXGB_TX_FLAGS_VLAN;
1503 vlan_id = vlan_tx_tag_get(skb);
1504 }
1505
1506 first = adapter->tx_ring.next_to_use;
0060c072 1507
1da177e4
LT		 1508 tso = ixgb_tso(adapter, skb);
1509 if (tso < 0) {
c2199340 1510 dev_kfree_skb(skb);
1da177e4
LT		 1511 return NETDEV_TX_OK;
1512 }
1513
96f9c2e2 1514 if (likely(tso))
1da177e4 1515 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1516 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1517 tx_flags |= IXGB_TX_FLAGS_CSUM;
1518
fe52eeb8 1519 count = ixgb_tx_map(adapter, skb, first);
1da177e4 1520
fe52eeb8
AD		 1521 if (count) {
1522 ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
fe52eeb8
AD		 1523 /* Make sure there is space in the ring for the next send. */
1524 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1da177e4 1525
fe52eeb8
AD		 1526 } else {
1527 dev_kfree_skb_any(skb);
1528 adapter->tx_ring.buffer_info[first].time_stamp = 0;
1529 adapter->tx_ring.next_to_use = first;
1530 }
f017f14b 1531
f017f14b 1532 return NETDEV_TX_OK;
1da177e4
LT		 1533}
1534
1535/**
1536 * ixgb_tx_timeout - Respond to a Tx Hang
1537 * @netdev: network interface device structure
1538 **/
1539
1540static void
1541ixgb_tx_timeout(struct net_device *netdev)
1542{
8908c6cd 1543 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1544
1545 /* Do the reset outside of interrupt context */
1546 schedule_work(&adapter->tx_timeout_task);
1547}
1548
1549static void
c4028958 1550ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1551{
c4028958
DH		 1552 struct ixgb_adapter *adapter =
1553 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1554
9b8118df 1555 adapter->tx_timeout_count++;
446490ca 1556 ixgb_down(adapter, true);
1da177e4
LT		 1557 ixgb_up(adapter);
1558}
1559
1560/**
1561 * ixgb_get_stats - Get System Network Statistics
1562 * @netdev: network interface device structure
1563 *
1564 * Returns the address of the device statistics structure.
1565 * The statistics are actually updated from the timer callback.
1566 **/
1567
1568static struct net_device_stats *
1569ixgb_get_stats(struct net_device *netdev)
1570{
0cdc0369 1571 return &netdev->stats;
1da177e4
LT		 1572}
1573
1574/**
1575 * ixgb_change_mtu - Change the Maximum Transfer Unit
1576 * @netdev: network interface device structure
1577 * @new_mtu: new value for maximum frame size
1578 *
1579 * Returns 0 on success, negative on failure
1580 **/
1581
1582static int
1583ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1584{
8908c6cd 1585 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1586 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1587 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1588
a65a604a
JB		 1589 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1590 if ((new_mtu < 68) ||
1591 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
6909c66d
JP		 1592 netif_err(adapter, probe, adapter->netdev,
1593 "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1594 return -EINVAL;
1595 }
1596
b5ca88eb
JB		 1597 if (old_max_frame == max_frame)
1598 return 0;
1599
1600 if (netif_running(netdev))
1601 ixgb_down(adapter, true);
1602
a3dc3da0 1603 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1604
1605 netdev->mtu = new_mtu;
1606
b5ca88eb 1607 if (netif_running(netdev))
1da177e4 1608 ixgb_up(adapter);
1da177e4
LT		 1609
1610 return 0;
1611}
1612
1613/**
1614 * ixgb_update_stats - Update the board statistics counters.
1615 * @adapter: board private structure
1616 **/
1617
1618void
1619ixgb_update_stats(struct ixgb_adapter *adapter)
1620{
5633684d 1621 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1622 struct pci_dev *pdev = adapter->pdev;
1623
1624 /* Prevent stats update while adapter is being reset */
81b1955e 1625 if (pci_channel_offline(pdev))
01748fbb 1626 return;
5633684d 1627
03f83041 1628 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
4cd24eaf 1629 (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
5633684d
MC		 1630 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1631 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1632 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1633 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1634
1635 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1636 /* fix up multicast stats by removing broadcasts */
03f83041 1637 if (multi >= bcast)
7b89178d 1638 multi -= bcast;
0060c072 1639
5633684d
MC		 1640 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1641 adapter->stats.mprch += (multi >> 32);
0060c072 1642 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1643 adapter->stats.bprch += bcast_h;
1644 } else {
1645 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1646 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1647 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1648 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1649 }
1da177e4
LT		 1650 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1651 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1652 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1653 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1654 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1655 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1656 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1657 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1658 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1659 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1660 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1661 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1662 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1663 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1664 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1665 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1666 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1667 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1668 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1669 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1670 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1671 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1672 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1673 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1674 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1675 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1676 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1677 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1678 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1679 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1680 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1681 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1682 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1683 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1684 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1685 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1686 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1687 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1688 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1689 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1690 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1691 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1692 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1693 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1694 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1695 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1696 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1697 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1698 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1699 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1700 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1701 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1702 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1703 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1704 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1705 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1706
1707 /* Fill out the OS statistics structure */
1708
0cdc0369
AK		 1709 netdev->stats.rx_packets = adapter->stats.gprcl;
1710 netdev->stats.tx_packets = adapter->stats.gptcl;
1711 netdev->stats.rx_bytes = adapter->stats.gorcl;
1712 netdev->stats.tx_bytes = adapter->stats.gotcl;
1713 netdev->stats.multicast = adapter->stats.mprcl;
1714 netdev->stats.collisions = 0;
1da177e4
LT		 1715
1716 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1717 * with a length in the type/len field */
0cdc0369 1718 netdev->stats.rx_errors =
1da177e4
LT		 1719 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1720 adapter->stats.ruc +
1721 adapter->stats.roc /*+ adapter->stats.rlec */ +
1722 adapter->stats.icbc +
1723 adapter->stats.ecbc + adapter->stats.mpc;
1724
1da177e4 1725 /* see above
0cdc0369 1726 * netdev->stats.rx_length_errors = adapter->stats.rlec;
1da177e4
LT		 1727 */
1728
0cdc0369
AK		 1729 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
1730 netdev->stats.rx_fifo_errors = adapter->stats.mpc;
1731 netdev->stats.rx_missed_errors = adapter->stats.mpc;
1732 netdev->stats.rx_over_errors = adapter->stats.mpc;
1733
1734 netdev->stats.tx_errors = 0;
1735 netdev->stats.rx_frame_errors = 0;
1736 netdev->stats.tx_aborted_errors = 0;
1737 netdev->stats.tx_carrier_errors = 0;
1738 netdev->stats.tx_fifo_errors = 0;
1739 netdev->stats.tx_heartbeat_errors = 0;
1740 netdev->stats.tx_window_errors = 0;
1da177e4
LT		 1741}
1742
1743#define IXGB_MAX_INTR 10
1744/**
1745 * ixgb_intr - Interrupt Handler
1746 * @irq: interrupt number
1747 * @data: pointer to a network interface device structure
1da177e4
LT		 1748 **/
1749
1750static irqreturn_t
7d12e780 1751ixgb_intr(int irq, void *data)
1da177e4
LT		 1752{
1753 struct net_device *netdev = data;
8908c6cd 1754 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1755 struct ixgb_hw *hw = &adapter->hw;
222441a6 1756 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4 1757
03f83041 1758 if (unlikely(!icr))
1da177e4
LT		 1759 return IRQ_NONE; /* Not our interrupt */
1760
bab2bce7
JB		 1761 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1762 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1763 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4 1764
288379f0 1765 if (napi_schedule_prep(&adapter->napi)) {
1da177e4 1766
0060c072 1767 /* Disable interrupts and register for poll. The flush
1da177e4
LT		 1768 of the posted write is intentionally left out.
1769 */
1770
1da177e4 1771 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
288379f0 1772 __napi_schedule(&adapter->napi);
1da177e4 1773 }
1da177e4
LT		 1774 return IRQ_HANDLED;
1775}
1776
1da177e4
LT		 1777/**
1778 * ixgb_clean - NAPI Rx polling callback
1779 * @adapter: board private structure
1780 **/
1781
1782static int
bea3348e 1783ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1784{
bea3348e 1785 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1da177e4
LT		 1786 int work_done = 0;
1787
53e52c72 1788 ixgb_clean_tx_irq(adapter);
bea3348e 1789 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1790
53e52c72
DM		 1791 /* If budget not fully consumed, exit the polling mode */
1792 if (work_done < budget) {
288379f0 1793 napi_complete(napi);
72ab5195
JB		 1794 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1795 ixgb_irq_enable(adapter);
1da177e4
LT		 1796 }
1797
bea3348e 1798 return work_done;
1da177e4 1799}
1da177e4
LT		 1800
1801/**
1802 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1803 * @adapter: board private structure
1804 **/
1805
446490ca 1806static bool
1da177e4
LT		 1807ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1808{
1809 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1810 struct net_device *netdev = adapter->netdev;
1811 struct ixgb_tx_desc *tx_desc, *eop_desc;
1812 struct ixgb_buffer *buffer_info;
1813 unsigned int i, eop;
446490ca 1814 bool cleaned = false;
1da177e4
LT		 1815
1816 i = tx_ring->next_to_clean;
1817 eop = tx_ring->buffer_info[i].next_to_watch;
1818 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1819
9a432992 1820 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1821
2d0bb1c1 1822 rmb(); /* read buffer_info after eop_desc */
446490ca 1823 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1824 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1825 buffer_info = &tx_ring->buffer_info[i];
1826
0060c072
JB		 1827 if (tx_desc->popts &
1828 (IXGB_TX_DESC_POPTS_TXSM |
1829 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1830 adapter->hw_csum_tx_good++;
1831
1832 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1833
222441a6 1834 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1835
1836 cleaned = (i == eop);
03f83041 1837 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1838 }
1839
1840 eop = tx_ring->buffer_info[i].next_to_watch;
1841 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1842 }
1843
1844 tx_ring->next_to_clean = i;
1845
0f8ecbad
JB		 1846 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1847 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1848 /* Make sure that anybody stopping the queue after this
1849 * sees the new next_to_clean. */
1850 smp_mb();
1851
1852 if (netif_queue_stopped(netdev) &&
1853 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1854 netif_wake_queue(netdev);
0f8ecbad
JB		 1855 ++adapter->restart_queue;
1856 }
1da177e4 1857 }
1da177e4 1858
03f83041 1859 if (adapter->detect_tx_hung) {
1da177e4
LT		 1860 /* detect a transmit hang in hardware, this serializes the
1861 * check with the clearing of time_stamp and movement of i */
446490ca 1862 adapter->detect_tx_hung = false;
fe52eeb8 1863 if (tx_ring->buffer_info[eop].time_stamp &&
9b8118df 1864 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1865 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1866 IXGB_STATUS_TXOFF)) {
1867 /* detected Tx unit hang */
6909c66d
JP		 1868 netif_err(adapter, drv, adapter->netdev,
1869 "Detected Tx Unit Hang\n"
1870 " TDH <%x>\n"
1871 " TDT <%x>\n"
1872 " next_to_use <%x>\n"
1873 " next_to_clean <%x>\n"
1874 "buffer_info[next_to_clean]\n"
1875 " time_stamp <%lx>\n"
1876 " next_to_watch <%x>\n"
1877 " jiffies <%lx>\n"
1878 " next_to_watch.status <%x>\n",
1879 IXGB_READ_REG(&adapter->hw, TDH),
1880 IXGB_READ_REG(&adapter->hw, TDT),
1881 tx_ring->next_to_use,
1882 tx_ring->next_to_clean,
1883 tx_ring->buffer_info[eop].time_stamp,
1884 eop,
1885 jiffies,
1886 eop_desc->status);
1da177e4 1887 netif_stop_queue(netdev);
9b8118df 1888 }
1da177e4
LT		 1889 }
1890
1891 return cleaned;
1892}
1893
1894/**
1895 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1896 * @adapter: board private structure
1897 * @rx_desc: receive descriptor
1898 * @sk_buff: socket buffer with received data
1899 **/
1900
235949d1 1901static void
1da177e4 1902ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1903 struct ixgb_rx_desc *rx_desc,
1904 struct sk_buff *skb)
1da177e4
LT		 1905{
1906 /* Ignore Checksum bit is set OR
1907 * TCP Checksum has not been calculated
1908 */
03f83041 1909 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4 1910 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
bc8acf2c 1911 skb_checksum_none_assert(skb);
1da177e4
LT		 1912 return;
1913 }
1914
1915 /* At this point we know the hardware did the TCP checksum */
1916 /* now look at the TCP checksum error bit */
03f83041 1917 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4 1918 /* let the stack verify checksum errors */
bc8acf2c 1919 skb_checksum_none_assert(skb);
1da177e4
LT		 1920 adapter->hw_csum_rx_error++;
1921 } else {
1922 /* TCP checksum is good */
1923 skb->ip_summed = CHECKSUM_UNNECESSARY;
1924 adapter->hw_csum_rx_good++;
1925 }
1926}
1927
57bf6eef
JP		 1928/*
1929 * this should improve performance for small packets with large amounts
1930 * of reassembly being done in the stack
1931 */
1932static void ixgb_check_copybreak(struct net_device *netdev,
1933 struct ixgb_buffer *buffer_info,
1934 u32 length, struct sk_buff **skb)
1935{
1936 struct sk_buff *new_skb;
1937
1938 if (length > copybreak)
1939 return;
1940
1941 new_skb = netdev_alloc_skb_ip_align(netdev, length);
1942 if (!new_skb)
1943 return;
1944
1945 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
1946 (*skb)->data - NET_IP_ALIGN,
1947 length + NET_IP_ALIGN);
1948 /* save the skb in buffer_info as good */
1949 buffer_info->skb = *skb;
1950 *skb = new_skb;
1951}
1952
1da177e4
LT		 1953/**
1954 * ixgb_clean_rx_irq - Send received data up the network stack,
1955 * @adapter: board private structure
1956 **/
1957
446490ca 1958static bool
1da177e4 1959ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1da177e4
LT		 1960{
1961 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1962 struct net_device *netdev = adapter->netdev;
1963 struct pci_dev *pdev = adapter->pdev;
1964 struct ixgb_rx_desc *rx_desc, *next_rxd;
1965 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1966 u32 length;
1da177e4 1967 unsigned int i, j;
fc2d14e3 1968 int cleaned_count = 0;
446490ca 1969 bool cleaned = false;
1da177e4
LT		 1970
1971 i = rx_ring->next_to_clean;
1972 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1973 buffer_info = &rx_ring->buffer_info[i];
1974
9a432992 1975 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
fc2d14e3 1976 struct sk_buff *skb;
f404de1c 1977 u8 status;
1da177e4 1978
03f83041 1979 if (*work_done >= work_to_do)
1da177e4
LT		 1980 break;
1981
1982 (*work_done)++;
2d0bb1c1 1983 rmb(); /* read descriptor and rx_buffer_info after status DD */
f404de1c 1984 status = rx_desc->status;
1da177e4 1985 skb = buffer_info->skb;
1dfdd7df 1986 buffer_info->skb = NULL;
f404de1c 1987
fc2d14e3 1988 prefetch(skb->data - NET_IP_ALIGN);
1da177e4 1989
57bf6eef
JP		 1990 if (++i == rx_ring->count)
1991 i = 0;
1da177e4
LT		 1992 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1993 prefetch(next_rxd);
1994
57bf6eef
JP		 1995 j = i + 1;
1996 if (j == rx_ring->count)
1997 j = 0;
1da177e4
LT		 1998 next2_buffer = &rx_ring->buffer_info[j];
1999 prefetch(next2_buffer);
2000
2001 next_buffer = &rx_ring->buffer_info[i];
1da177e4 2002
446490ca 2003 cleaned = true;
fc2d14e3 2004 cleaned_count++;
1da177e4 2005
47631f85 2006 dma_unmap_single(&pdev->dev,
1da177e4
LT		 2007 buffer_info->dma,
2008 buffer_info->length,
47631f85 2009 DMA_FROM_DEVICE);
fc2d14e3 2010 buffer_info->dma = 0;
1da177e4
LT		 2011
2012 length = le16_to_cpu(rx_desc->length);
fc2d14e3 2013 rx_desc->length = 0;
1da177e4 2014
03f83041 2015 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 2016
2017 /* All receives must fit into a single buffer */
2018
2019 IXGB_DBG("Receive packet consumed multiple buffers "
2020 "length<%x>\n", length);
2021
2022 dev_kfree_skb_irq(skb);
f404de1c 2023 goto rxdesc_done;
1da177e4
LT		 2024 }
2025
0060c072
JB		 2026 if (unlikely(rx_desc->errors &
2027 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
2028 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 2029 dev_kfree_skb_irq(skb);
f404de1c 2030 goto rxdesc_done;
1da177e4
LT		 2031 }
2032
57bf6eef 2033 ixgb_check_copybreak(netdev, buffer_info, length, &skb);
6b900bb4 2034
1da177e4
LT		 2035 /* Good Receive */
2036 skb_put(skb, length);
2037
2038 /* Receive Checksum Offload */
2039 ixgb_rx_checksum(adapter, rx_desc, skb);
2040
2041 skb->protocol = eth_type_trans(skb, netdev);
03f83041 2042 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2043 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
0060c072 2044 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2045 } else {
2046 netif_receive_skb(skb);
2047 }
1da177e4 2048
f404de1c
MC		 2049rxdesc_done:
2050 /* clean up descriptor, might be written over by hw */
1da177e4 2051 rx_desc->status = 0;
1da177e4 2052
fc2d14e3
JB		 2053 /* return some buffers to hardware, one at a time is too slow */
2054 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
2055 ixgb_alloc_rx_buffers(adapter, cleaned_count);
2056 cleaned_count = 0;
2057 }
2058
f404de1c 2059 /* use prefetched values */
1da177e4
LT		 2060 rx_desc = next_rxd;
2061 buffer_info = next_buffer;
2062 }
2063
2064 rx_ring->next_to_clean = i;
2065
fc2d14e3
JB		 2066 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2067 if (cleaned_count)
2068 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1da177e4
LT		 2069
2070 return cleaned;
2071}
2072
2073/**
2074 * ixgb_alloc_rx_buffers - Replace used receive buffers
2075 * @adapter: address of board private structure
2076 **/
2077
2078static void
fc2d14e3 2079ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
1da177e4
LT		 2080{
2081 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2082 struct net_device *netdev = adapter->netdev;
2083 struct pci_dev *pdev = adapter->pdev;
2084 struct ixgb_rx_desc *rx_desc;
2085 struct ixgb_buffer *buffer_info;
2086 struct sk_buff *skb;
2087 unsigned int i;
1da177e4
LT		 2088 long cleancount;
2089
2090 i = rx_ring->next_to_use;
2091 buffer_info = &rx_ring->buffer_info[i];
2092 cleancount = IXGB_DESC_UNUSED(rx_ring);
2093
1da177e4 2094
41639fed 2095 /* leave three descriptors unused */
fc2d14e3 2096 while (--cleancount > 2 && cleaned_count--) {
1dfdd7df 2097 /* recycle! its good for you */
69c7a940
AK		 2098 skb = buffer_info->skb;
2099 if (skb) {
1dfdd7df
AK		 2100 skb_trim(skb, 0);
2101 goto map_skb;
2102 }
1da177e4 2103
89d71a66 2104 skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
1dfdd7df 2105 if (unlikely(!skb)) {
1da177e4 2106 /* Better luck next round */
1dfdd7df 2107 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2108 break;
2109 }
2110
1da177e4
LT		 2111 buffer_info->skb = skb;
2112 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df 2113map_skb:
47631f85 2114 buffer_info->dma = dma_map_single(&pdev->dev,
1dfdd7df
AK		 2115 skb->data,
2116 adapter->rx_buffer_len,
47631f85 2117 DMA_FROM_DEVICE);
1da177e4 2118
1dfdd7df 2119 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2120 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2121 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2122 * this is the rest of the workaround for h/w double
41639fed
MC		 2123 * writeback. */
2124 rx_desc->status = 0;
1da177e4 2125
1da177e4 2126
03f83041 2127 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2128 buffer_info = &rx_ring->buffer_info[i];
2129 }
2130
1dfdd7df
AK		 2131 if (likely(rx_ring->next_to_use != i)) {
2132 rx_ring->next_to_use = i;
2133 if (unlikely(i-- == 0))
2134 i = (rx_ring->count - 1);
2135
2136 /* Force memory writes to complete before letting h/w
2137 * know there are new descriptors to fetch. (Only
2138 * applicable for weak-ordered memory model archs, such
2139 * as IA-64). */
2140 wmb();
2141 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2142 }
1da177e4
LT		 2143}
2144
2145/**
2146 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
0060c072 2147 *
1da177e4
LT		 2148 * @param netdev network interface device structure
2149 * @param grp indicates to enable or disable tagging/stripping
2150 **/
2151static void
2152ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2153{
8908c6cd 2154 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2155 u32 ctrl, rctl;
1da177e4
LT		 2156
2157 ixgb_irq_disable(adapter);
2158 adapter->vlgrp = grp;
2159
03f83041 2160 if (grp) {
1da177e4
LT		 2161 /* enable VLAN tag insert/strip */
2162 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2163 ctrl |= IXGB_CTRL0_VME;
2164 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2165
2166 /* enable VLAN receive filtering */
2167
2168 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
1da177e4
LT		 2169 rctl &= ~IXGB_RCTL_CFIEN;
2170 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2171 } else {
2172 /* disable VLAN tag insert/strip */
2173
2174 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2175 ctrl &= ~IXGB_CTRL0_VME;
2176 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
1da177e4
LT		 2177 }
2178
bab2bce7
JB		 2179 /* don't enable interrupts unless we are UP */
2180 if (adapter->netdev->flags & IFF_UP)
2181 ixgb_irq_enable(adapter);
1da177e4
LT		 2182}
2183
2184static void
222441a6 2185ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2186{
8908c6cd 2187 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2188 u32 vfta, index;
1da177e4
LT		 2189
2190 /* add VID to filter table */
2191
2192 index = (vid >> 5) & 0x7F;
2193 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2194 vfta |= (1 << (vid & 0x1F));
2195 ixgb_write_vfta(&adapter->hw, index, vfta);
2196}
2197
2198static void
222441a6 2199ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2200{
8908c6cd 2201 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2202 u32 vfta, index;
1da177e4
LT		 2203
2204 ixgb_irq_disable(adapter);
2205
5c15bdec 2206 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 2207
bab2bce7
JB		 2208 /* don't enable interrupts unless we are UP */
2209 if (adapter->netdev->flags & IFF_UP)
2210 ixgb_irq_enable(adapter);
1da177e4 2211
bab2bce7 2212 /* remove VID from filter table */
1da177e4
LT		 2213
2214 index = (vid >> 5) & 0x7F;
2215 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2216 vfta &= ~(1 << (vid & 0x1F));
2217 ixgb_write_vfta(&adapter->hw, index, vfta);
2218}
2219
2220static void
2221ixgb_restore_vlan(struct ixgb_adapter *adapter)
2222{
2223 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2224
03f83041 2225 if (adapter->vlgrp) {
222441a6 2226 u16 vid;
b738127d 2227 for (vid = 0; vid < VLAN_N_VID; vid++) {
03f83041 2228 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2229 continue;
2230 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2231 }
2232 }
2233}
2234
1da177e4
LT		 2235#ifdef CONFIG_NET_POLL_CONTROLLER
2236/*
2237 * Polling 'interrupt' - used by things like netconsole to send skbs
2238 * without having to re-enable interrupts. It's not called while
2239 * the interrupt routine is executing.
2240 */
2241
2242static void ixgb_netpoll(struct net_device *dev)
2243{
f990b426 2244 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2245
1da177e4 2246 disable_irq(adapter->pdev->irq);
7d12e780 2247 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2248 enable_irq(adapter->pdev->irq);
2249}
2250#endif
2251
01748fbb
LV		 2252/**
2253 * ixgb_io_error_detected() - called when PCI error is detected
2254 * @pdev pointer to pci device with error
2255 * @state pci channel state after error
2256 *
2257 * This callback is called by the PCI subsystem whenever
2258 * a PCI bus error is detected.
2259 */
0060c072
JB		 2260static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2261 enum pci_channel_state state)
01748fbb
LV		 2262{
2263 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2264 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2265
d6a1f83b
DN		 2266 netif_device_detach(netdev);
2267
2268 if (state == pci_channel_io_perm_failure)
2269 return PCI_ERS_RESULT_DISCONNECT;
2270
03f83041 2271 if (netif_running(netdev))
446490ca 2272 ixgb_down(adapter, true);
01748fbb
LV		 2273
2274 pci_disable_device(pdev);
2275
2276 /* Request a slot reset. */
2277 return PCI_ERS_RESULT_NEED_RESET;
2278}
2279
2280/**
2281 * ixgb_io_slot_reset - called after the pci bus has been reset.
2282 * @pdev pointer to pci device with error
2283 *
52035bdb 2284 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2285 * Basically, this tries to restart the card from scratch.
2286 * This is a shortened version of the device probe/discovery code,
2287 * it resembles the first-half of the ixgb_probe() routine.
2288 */
0060c072 2289static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2290{
2291 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2292 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2293
03f83041 2294 if (pci_enable_device(pdev)) {
6909c66d
JP		 2295 netif_err(adapter, probe, adapter->netdev,
2296 "Cannot re-enable PCI device after reset\n");
01748fbb
LV		 2297 return PCI_ERS_RESULT_DISCONNECT;
2298 }
2299
2300 /* Perform card reset only on one instance of the card */
2301 if (0 != PCI_FUNC (pdev->devfn))
2302 return PCI_ERS_RESULT_RECOVERED;
2303
2304 pci_set_master(pdev);
2305
2306 netif_carrier_off(netdev);
2307 netif_stop_queue(netdev);
2308 ixgb_reset(adapter);
2309
2310 /* Make sure the EEPROM is good */
03f83041 2311 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
6909c66d
JP		 2312 netif_err(adapter, probe, adapter->netdev,
2313 "After reset, the EEPROM checksum is not valid\n");
01748fbb
LV		 2314 return PCI_ERS_RESULT_DISCONNECT;
2315 }
2316 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2317 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2318
03f83041 2319 if (!is_valid_ether_addr(netdev->perm_addr)) {
6909c66d
JP		 2320 netif_err(adapter, probe, adapter->netdev,
2321 "After reset, invalid MAC address\n");
01748fbb
LV		 2322 return PCI_ERS_RESULT_DISCONNECT;
2323 }
2324
2325 return PCI_ERS_RESULT_RECOVERED;
2326}
2327
2328/**
2329 * ixgb_io_resume - called when its OK to resume normal operations
2330 * @pdev pointer to pci device with error
2331 *
2332 * The error recovery driver tells us that its OK to resume
2333 * normal operation. Implementation resembles the second-half
2334 * of the ixgb_probe() routine.
2335 */
0060c072 2336static void ixgb_io_resume(struct pci_dev *pdev)
01748fbb
LV		 2337{
2338 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2339 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2340
2341 pci_set_master(pdev);
2342
03f83041
JB		 2343 if (netif_running(netdev)) {
2344 if (ixgb_up(adapter)) {
d328bc83 2345 pr_err("can't bring device back up after reset\n");
01748fbb
LV		 2346 return;
2347 }
2348 }
2349
2350 netif_device_attach(netdev);
2351 mod_timer(&adapter->watchdog_timer, jiffies);
2352}
2353
1da177e4 2354/* ixgb_main.c */
Clone of davem's net-next-2.6 tree