]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - drivers/net/ixgb/ixgb_main.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
drivers/net: use vzalloc()
[mirror_ubuntu-bionic-kernel.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;
89bf67f1 672 txdr->buffer_info = vzalloc(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 }
1da177e4
LT		 678
679 /* round up to nearest 4K */
680
681 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 682 txdr->size = ALIGN(txdr->size, 4096);
1da177e4 683
47631f85
NN		 684 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
685 GFP_KERNEL);
03f83041 686 if (!txdr->desc) {
1da177e4 687 vfree(txdr->buffer_info);
6909c66d
JP		 688 netif_err(adapter, probe, adapter->netdev,
689 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 690 return -ENOMEM;
691 }
692 memset(txdr->desc, 0, txdr->size);
693
694 txdr->next_to_use = 0;
695 txdr->next_to_clean = 0;
696
697 return 0;
698}
699
700/**
701 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
702 * @adapter: board private structure
703 *
704 * Configure the Tx unit of the MAC after a reset.
705 **/
706
707static void
708ixgb_configure_tx(struct ixgb_adapter *adapter)
709{
222441a6
JP		 710 u64 tdba = adapter->tx_ring.dma;
711 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
712 u32 tctl;
1da177e4
LT		 713 struct ixgb_hw *hw = &adapter->hw;
714
0060c072
JB		 715 /* Setup the Base and Length of the Tx Descriptor Ring
716 * tx_ring.dma can be either a 32 or 64 bit value
1da177e4
LT		 717 */
718
719 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
720 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
721
722 IXGB_WRITE_REG(hw, TDLEN, tdlen);
723
724 /* Setup the HW Tx Head and Tail descriptor pointers */
725
726 IXGB_WRITE_REG(hw, TDH, 0);
727 IXGB_WRITE_REG(hw, TDT, 0);
728
729 /* don't set up txdctl, it induces performance problems if configured
730 * incorrectly */
731 /* Set the Tx Interrupt Delay register */
732
733 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
734
735 /* Program the Transmit Control Register */
736
737 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
738 IXGB_WRITE_REG(hw, TCTL, tctl);
739
740 /* Setup Transmit Descriptor Settings for this adapter */
741 adapter->tx_cmd_type =
0060c072
JB		 742 IXGB_TX_DESC_TYPE |
743 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
1da177e4
LT		 744}
745
746/**
747 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
748 * @adapter: board private structure
749 *
750 * Returns 0 on success, negative on failure
751 **/
752
753int
754ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
755{
756 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
757 struct pci_dev *pdev = adapter->pdev;
758 int size;
759
760 size = sizeof(struct ixgb_buffer) * rxdr->count;
89bf67f1 761 rxdr->buffer_info = vzalloc(size);
03f83041 762 if (!rxdr->buffer_info) {
6909c66d
JP		 763 netif_err(adapter, probe, adapter->netdev,
764 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 765 return -ENOMEM;
766 }
1da177e4
LT		 767
768 /* Round up to nearest 4K */
769
770 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 771 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4 772
47631f85
NN		 773 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
774 GFP_KERNEL);
1da177e4 775
03f83041 776 if (!rxdr->desc) {
1da177e4 777 vfree(rxdr->buffer_info);
6909c66d
JP		 778 netif_err(adapter, probe, adapter->netdev,
779 "Unable to allocate receive descriptors\n");
1da177e4
LT		 780 return -ENOMEM;
781 }
782 memset(rxdr->desc, 0, rxdr->size);
783
784 rxdr->next_to_clean = 0;
785 rxdr->next_to_use = 0;
786
787 return 0;
788}
789
790/**
791 * ixgb_setup_rctl - configure the receive control register
792 * @adapter: Board private structure
793 **/
794
795static void
796ixgb_setup_rctl(struct ixgb_adapter *adapter)
797{
222441a6 798 u32 rctl;
1da177e4
LT		 799
800 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
801
802 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
803
804 rctl |=
0060c072
JB		 805 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
806 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
1da177e4
LT		 807 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
808
809 rctl |= IXGB_RCTL_SECRC;
810
3f3dc0dd 811 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 812 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 813 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 814 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 815 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 816 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 817 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 818 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 819
820 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
821}
822
823/**
824 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
825 * @adapter: board private structure
826 *
827 * Configure the Rx unit of the MAC after a reset.
828 **/
829
830static void
831ixgb_configure_rx(struct ixgb_adapter *adapter)
832{
222441a6
JP		 833 u64 rdba = adapter->rx_ring.dma;
834 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 835 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 836 u32 rctl;
837 u32 rxcsum;
1da177e4
LT		 838
839 /* make sure receives are disabled while setting up the descriptors */
840
841 rctl = IXGB_READ_REG(hw, RCTL);
842 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
843
844 /* set the Receive Delay Timer Register */
845
846 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
847
848 /* Setup the Base and Length of the Rx Descriptor Ring */
849
850 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
851 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
852
853 IXGB_WRITE_REG(hw, RDLEN, rdlen);
854
855 /* Setup the HW Rx Head and Tail Descriptor Pointers */
856 IXGB_WRITE_REG(hw, RDH, 0);
857 IXGB_WRITE_REG(hw, RDT, 0);
858
4360386f
JB		 859 /* due to the hardware errata with RXDCTL, we are unable to use any of
860 * the performance enhancing features of it without causing other
861 * subtle bugs, some of the bugs could include receive length
862 * corruption at high data rates (WTHRESH > 0) and/or receive
863 * descriptor ring irregularites (particularly in hardware cache) */
864 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 865
866 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 867 if (adapter->rx_csum) {
1da177e4
LT		 868 rxcsum = IXGB_READ_REG(hw, RXCSUM);
869 rxcsum |= IXGB_RXCSUM_TUOFL;
870 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
871 }
872
873 /* Enable Receives */
874
875 IXGB_WRITE_REG(hw, RCTL, rctl);
876}
877
878/**
879 * ixgb_free_tx_resources - Free Tx Resources
880 * @adapter: board private structure
881 *
882 * Free all transmit software resources
883 **/
884
885void
886ixgb_free_tx_resources(struct ixgb_adapter *adapter)
887{
888 struct pci_dev *pdev = adapter->pdev;
889
890 ixgb_clean_tx_ring(adapter);
891
892 vfree(adapter->tx_ring.buffer_info);
893 adapter->tx_ring.buffer_info = NULL;
894
47631f85
NN		 895 dma_free_coherent(&pdev->dev, adapter->tx_ring.size,
896 adapter->tx_ring.desc, adapter->tx_ring.dma);
1da177e4
LT		 897
898 adapter->tx_ring.desc = NULL;
899}
900
235949d1 901static void
1da177e4 902ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
0060c072 903 struct ixgb_buffer *buffer_info)
1da177e4 904{
adeaa908
AD		 905 if (buffer_info->dma) {
906 if (buffer_info->mapped_as_page)
47631f85
NN		 907 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
908 buffer_info->length, DMA_TO_DEVICE);
adeaa908 909 else
47631f85
NN		 910 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
911 buffer_info->length, DMA_TO_DEVICE);
adeaa908
AD		 912 buffer_info->dma = 0;
913 }
914
fe52eeb8 915 if (buffer_info->skb) {
fe52eeb8
AD		 916 dev_kfree_skb_any(buffer_info->skb);
917 buffer_info->skb = NULL;
918 }
1dfdd7df
AK		 919 buffer_info->time_stamp = 0;
920 /* these fields must always be initialized in tx
921 * buffer_info->length = 0;
922 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 923}
924
925/**
926 * ixgb_clean_tx_ring - Free Tx Buffers
927 * @adapter: board private structure
928 **/
929
930static void
931ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
932{
933 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
934 struct ixgb_buffer *buffer_info;
935 unsigned long size;
936 unsigned int i;
937
938 /* Free all the Tx ring sk_buffs */
939
1459336d 940 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 941 buffer_info = &tx_ring->buffer_info[i];
942 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
943 }
944
945 size = sizeof(struct ixgb_buffer) * tx_ring->count;
946 memset(tx_ring->buffer_info, 0, size);
947
948 /* Zero out the descriptor ring */
949
950 memset(tx_ring->desc, 0, tx_ring->size);
951
952 tx_ring->next_to_use = 0;
953 tx_ring->next_to_clean = 0;
954
955 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
956 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
957}
958
959/**
960 * ixgb_free_rx_resources - Free Rx Resources
961 * @adapter: board private structure
962 *
963 * Free all receive software resources
964 **/
965
966void
967ixgb_free_rx_resources(struct ixgb_adapter *adapter)
968{
969 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
970 struct pci_dev *pdev = adapter->pdev;
971
972 ixgb_clean_rx_ring(adapter);
973
974 vfree(rx_ring->buffer_info);
975 rx_ring->buffer_info = NULL;
976
47631f85
NN		 977 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
978 rx_ring->dma);
1da177e4
LT		 979
980 rx_ring->desc = NULL;
981}
982
983/**
984 * ixgb_clean_rx_ring - Free Rx Buffers
985 * @adapter: board private structure
986 **/
987
988static void
989ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
990{
991 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
992 struct ixgb_buffer *buffer_info;
993 struct pci_dev *pdev = adapter->pdev;
994 unsigned long size;
995 unsigned int i;
996
997 /* Free all the Rx ring sk_buffs */
998
1459336d 999 for (i = 0; i < rx_ring->count; i++) {
1da177e4 1000 buffer_info = &rx_ring->buffer_info[i];
23e55a32 1001 if (buffer_info->dma) {
47631f85 1002 dma_unmap_single(&pdev->dev,
1da177e4
LT		 1003 buffer_info->dma,
1004 buffer_info->length,
47631f85 1005 DMA_FROM_DEVICE);
23e55a32
BJ		 1006 buffer_info->dma = 0;
1007 buffer_info->length = 0;
1008 }
1da177e4 1009
23e55a32 1010 if (buffer_info->skb) {
1da177e4 1011 dev_kfree_skb(buffer_info->skb);
1da177e4
LT		 1012 buffer_info->skb = NULL;
1013 }
1014 }
1015
1016 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1017 memset(rx_ring->buffer_info, 0, size);
1018
1019 /* Zero out the descriptor ring */
1020
1021 memset(rx_ring->desc, 0, rx_ring->size);
1022
1023 rx_ring->next_to_clean = 0;
1024 rx_ring->next_to_use = 0;
1025
1026 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1027 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1028}
1029
1030/**
1031 * ixgb_set_mac - Change the Ethernet Address of the NIC
1032 * @netdev: network interface device structure
1033 * @p: pointer to an address structure
1034 *
1035 * Returns 0 on success, negative on failure
1036 **/
1037
1038static int
1039ixgb_set_mac(struct net_device *netdev, void *p)
1040{
8908c6cd 1041 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1042 struct sockaddr *addr = p;
1043
03f83041 1044 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1045 return -EADDRNOTAVAIL;
1046
1047 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1048
1049 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1050
1051 return 0;
1052}
1053
1054/**
1055 * ixgb_set_multi - Multicast and Promiscuous mode set
1056 * @netdev: network interface device structure
1057 *
1058 * The set_multi entry point is called whenever the multicast address
1059 * list or the network interface flags are updated. This routine is
1060 * responsible for configuring the hardware for proper multicast,
1061 * promiscuous mode, and all-multi behavior.
1062 **/
1063
1064static void
1065ixgb_set_multi(struct net_device *netdev)
1066{
8908c6cd 1067 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1068 struct ixgb_hw *hw = &adapter->hw;
22bedad3 1069 struct netdev_hw_addr *ha;
222441a6 1070 u32 rctl;
1da177e4
LT		 1071 int i;
1072
1073 /* Check for Promiscuous and All Multicast modes */
1074
1075 rctl = IXGB_READ_REG(hw, RCTL);
1076
03f83041 1077 if (netdev->flags & IFF_PROMISC) {
1da177e4 1078 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
746b9f02 1079 rctl &= ~IXGB_RCTL_VFE;
1da177e4 1080 } else {
746b9f02
PM		 1081 if (netdev->flags & IFF_ALLMULTI) {
1082 rctl |= IXGB_RCTL_MPE;
1083 rctl &= ~IXGB_RCTL_UPE;
1084 } else {
1085 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1086 }
78ed11a5 1087 rctl |= IXGB_RCTL_VFE;
1da177e4
LT		 1088 }
1089
4cd24eaf 1090 if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1091 rctl |= IXGB_RCTL_MPE;
1092 IXGB_WRITE_REG(hw, RCTL, rctl);
1093 } else {
222441a6 1094 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1095 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1096
1097 IXGB_WRITE_REG(hw, RCTL, rctl);
1098
48e2f183 1099 i = 0;
22bedad3 1100 netdev_for_each_mc_addr(ha, netdev)
48e2f183 1101 memcpy(&mta[i++ * IXGB_ETH_LENGTH_OF_ADDRESS],
22bedad3 1102 ha->addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1da177e4 1103
4cd24eaf 1104 ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0);
1da177e4
LT		 1105 }
1106}
1107
1108/**
1109 * ixgb_watchdog - Timer Call-back
1110 * @data: pointer to netdev cast into an unsigned long
1111 **/
1112
1113static void
1114ixgb_watchdog(unsigned long data)
1115{
1116 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1117 struct net_device *netdev = adapter->netdev;
1118 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1119
1120 ixgb_check_for_link(&adapter->hw);
1121
1122 if (ixgb_check_for_bad_link(&adapter->hw)) {
1123 /* force the reset path */
1124 netif_stop_queue(netdev);
1125 }
1126
03f83041
JB		 1127 if (adapter->hw.link_up) {
1128 if (!netif_carrier_ok(netdev)) {
d328bc83
JP		 1129 netdev_info(netdev,
1130 "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
1131 (adapter->hw.fc.type == ixgb_fc_full) ?
1132 "RX/TX" :
1133 (adapter->hw.fc.type == ixgb_fc_rx_pause) ?
1134 "RX" :
1135 (adapter->hw.fc.type == ixgb_fc_tx_pause) ?
1136 "TX" : "None");
1da177e4
LT		 1137 adapter->link_speed = 10000;
1138 adapter->link_duplex = FULL_DUPLEX;
1139 netif_carrier_on(netdev);
1da177e4
LT		 1140 }
1141 } else {
03f83041 1142 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1143 adapter->link_speed = 0;
1144 adapter->link_duplex = 0;
d328bc83 1145 netdev_info(netdev, "NIC Link is Down\n");
1da177e4 1146 netif_carrier_off(netdev);
1da177e4
LT		 1147 }
1148 }
1149
1150 ixgb_update_stats(adapter);
1151
03f83041
JB		 1152 if (!netif_carrier_ok(netdev)) {
1153 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1154 /* We've lost link, so the controller stops DMA,
1155 * but we've got queued Tx work that's never going
1156 * to get done, so reset controller to flush Tx.
1157 * (Do the reset outside of interrupt context). */
1158 schedule_work(&adapter->tx_timeout_task);
c2d5ab49
JB		 1159 /* return immediately since reset is imminent */
1160 return;
1da177e4
LT		 1161 }
1162 }
1163
1164 /* Force detection of hung controller every watchdog period */
446490ca 1165 adapter->detect_tx_hung = true;
1da177e4
LT		 1166
1167 /* generate an interrupt to force clean up of any stragglers */
1168 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1169
1170 /* Reset the timer */
1171 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1172}
1173
1174#define IXGB_TX_FLAGS_CSUM 0x00000001
1175#define IXGB_TX_FLAGS_VLAN 0x00000002
1176#define IXGB_TX_FLAGS_TSO 0x00000004
1177
235949d1 1178static int
1da177e4
LT		 1179ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1180{
1da177e4
LT		 1181 struct ixgb_context_desc *context_desc;
1182 unsigned int i;
222441a6
JP		 1183 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1184 u16 ipcse, tucse, mss;
1da177e4
LT		 1185 int err;
1186
89114afd 1187 if (likely(skb_is_gso(skb))) {
adc54139 1188 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1189 struct iphdr *iph;
1190
1da177e4
LT		 1191 if (skb_header_cloned(skb)) {
1192 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1193 if (err)
1194 return err;
1195 }
1196
ab6a5bb6 1197 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1198 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1199 iph = ip_hdr(skb);
1200 iph->tot_len = 0;
1201 iph->check = 0;
aa8223c7
ACM		 1202 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1203 iph->daddr, 0,
1204 IPPROTO_TCP, 0);
bbe735e4 1205 ipcss = skb_network_offset(skb);
eddc9ec5 1206 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1207 ipcse = skb_transport_offset(skb) - 1;
1208 tucss = skb_transport_offset(skb);
aa8223c7 1209 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1210 tucse = 0;
1211
1212 i = adapter->tx_ring.next_to_use;
1213 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1214 buffer_info = &adapter->tx_ring.buffer_info[i];
1215 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1216
1217 context_desc->ipcss = ipcss;
1218 context_desc->ipcso = ipcso;
1219 context_desc->ipcse = cpu_to_le16(ipcse);
1220 context_desc->tucss = tucss;
1221 context_desc->tucso = tucso;
1222 context_desc->tucse = cpu_to_le16(tucse);
1223 context_desc->mss = cpu_to_le16(mss);
1224 context_desc->hdr_len = hdr_len;
1225 context_desc->status = 0;
1226 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1227 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1228 | IXGB_CONTEXT_DESC_CMD_TSE
1229 | IXGB_CONTEXT_DESC_CMD_IP
1230 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1231 | IXGB_CONTEXT_DESC_CMD_IDE
1232 | (skb->len - (hdr_len)));
1233
06c2f9ec 1234
03f83041 1235 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1236 adapter->tx_ring.next_to_use = i;
1237
1238 return 1;
1239 }
1da177e4
LT		 1240
1241 return 0;
1242}
1243
446490ca 1244static bool
1da177e4
LT		 1245ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1246{
1247 struct ixgb_context_desc *context_desc;
1248 unsigned int i;
222441a6 1249 u8 css, cso;
1da177e4 1250
03f83041 1251 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1252 struct ixgb_buffer *buffer_info;
ea2ae17d 1253 css = skb_transport_offset(skb);
ff1dcadb 1254 cso = css + skb->csum_offset;
1da177e4
LT		 1255
1256 i = adapter->tx_ring.next_to_use;
1257 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1258 buffer_info = &adapter->tx_ring.buffer_info[i];
1259 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1260
1261 context_desc->tucss = css;
1262 context_desc->tucso = cso;
1263 context_desc->tucse = 0;
1264 /* zero out any previously existing data in one instruction */
222441a6 1265 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1266 context_desc->status = 0;
1267 context_desc->hdr_len = 0;
1268 context_desc->mss = 0;
1269 context_desc->cmd_type_len =
1270 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1271 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1272
03f83041 1273 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1274 adapter->tx_ring.next_to_use = i;
1275
446490ca 1276 return true;
1da177e4
LT		 1277 }
1278
446490ca 1279 return false;
1da177e4
LT		 1280}
1281
1282#define IXGB_MAX_TXD_PWR 14
1283#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1284
235949d1 1285static int
1da177e4
LT		 1286ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1287 unsigned int first)
1288{
1289 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
adeaa908 1290 struct pci_dev *pdev = adapter->pdev;
1da177e4 1291 struct ixgb_buffer *buffer_info;
fe52eeb8 1292 int len = skb_headlen(skb);
1da177e4 1293 unsigned int offset = 0, size, count = 0, i;
5d927853 1294 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1295 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1296 unsigned int f;
1da177e4
LT		 1297
1298 i = tx_ring->next_to_use;
1299
9a432992 1300 while (len) {
1da177e4 1301 buffer_info = &tx_ring->buffer_info[i];
709cf018 1302 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1303 /* Workaround for premature desc write-backs
1304 * in TSO mode. Append 4-byte sentinel desc */
1305 if (unlikely(mss && !nr_frags && size == len && size > 8))
1306 size -= 4;
1307
1da177e4 1308 buffer_info->length = size;
adc54139 1309 WARN_ON(buffer_info->dma != 0);
34336635 1310 buffer_info->time_stamp = jiffies;
adeaa908 1311 buffer_info->mapped_as_page = false;
47631f85
NN		 1312 buffer_info->dma = dma_map_single(&pdev->dev,
1313 skb->data + offset,
1314 size, DMA_TO_DEVICE);
1315 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
adeaa908 1316 goto dma_error;
1dfdd7df 1317 buffer_info->next_to_watch = 0;
1da177e4
LT		 1318
1319 len -= size;
1320 offset += size;
1321 count++;
fe52eeb8
AD		 1322 if (len) {
1323 i++;
1324 if (i == tx_ring->count)
1325 i = 0;
1326 }
1da177e4
LT		 1327 }
1328
1459336d 1329 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 1330 struct skb_frag_struct *frag;
1331
1332 frag = &skb_shinfo(skb)->frags[f];
1333 len = frag->size;
adeaa908 1334 offset = frag->page_offset;
1da177e4 1335
9a432992 1336 while (len) {
fe52eeb8
AD		 1337 i++;
1338 if (i == tx_ring->count)
1339 i = 0;
1340
1da177e4 1341 buffer_info = &tx_ring->buffer_info[i];
709cf018 1342 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1343
1344 /* Workaround for premature desc write-backs
1345 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1346 if (unlikely(mss && (f == (nr_frags - 1))
1347 && size == len && size > 8))
5d927853
JB		 1348 size -= 4;
1349
1da177e4 1350 buffer_info->length = size;
34336635 1351 buffer_info->time_stamp = jiffies;
adeaa908
AD		 1352 buffer_info->mapped_as_page = true;
1353 buffer_info->dma =
47631f85
NN		 1354 dma_map_page(&pdev->dev, frag->page,
1355 offset, size, DMA_TO_DEVICE);
1356 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
adeaa908 1357 goto dma_error;
1dfdd7df 1358 buffer_info->next_to_watch = 0;
1da177e4
LT		 1359
1360 len -= size;
1361 offset += size;
1362 count++;
1da177e4
LT		 1363 }
1364 }
1da177e4
LT		 1365 tx_ring->buffer_info[i].skb = skb;
1366 tx_ring->buffer_info[first].next_to_watch = i;
1367
1368 return count;
adeaa908
AD		 1369
1370dma_error:
1371 dev_err(&pdev->dev, "TX DMA map failed\n");
1372 buffer_info->dma = 0;
c1fa347f 1373 if (count)
adeaa908 1374 count--;
c1fa347f
RK		 1375
1376 while (count--) {
1377 if (i==0)
adeaa908 1378 i += tx_ring->count;
c1fa347f 1379 i--;
adeaa908
AD		 1380 buffer_info = &tx_ring->buffer_info[i];
1381 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1382 }
1383
1384 return 0;
1da177e4
LT		 1385}
1386
235949d1 1387static void
1da177e4
LT		 1388ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1389{
1390 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1391 struct ixgb_tx_desc *tx_desc = NULL;
1392 struct ixgb_buffer *buffer_info;
222441a6
JP		 1393 u32 cmd_type_len = adapter->tx_cmd_type;
1394 u8 status = 0;
1395 u8 popts = 0;
1da177e4
LT		 1396 unsigned int i;
1397
03f83041 1398 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1399 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1400 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1401 }
1402
03f83041 1403 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1404 popts |= IXGB_TX_DESC_POPTS_TXSM;
1405
03f83041 1406 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1407 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1408
1409 i = tx_ring->next_to_use;
1410
9a432992 1411 while (count--) {
1da177e4
LT		 1412 buffer_info = &tx_ring->buffer_info[i];
1413 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1414 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1415 tx_desc->cmd_type_len =
1416 cpu_to_le32(cmd_type_len | buffer_info->length);
1417 tx_desc->status = status;
1418 tx_desc->popts = popts;
1419 tx_desc->vlan = cpu_to_le16(vlan_id);
1420
03f83041 1421 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1422 }
1423
0060c072
JB		 1424 tx_desc->cmd_type_len |=
1425 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1426
1427 /* Force memory writes to complete before letting h/w
1428 * know there are new descriptors to fetch. (Only
1429 * applicable for weak-ordered memory model archs,
1430 * such as IA-64). */
1431 wmb();
1432
1433 tx_ring->next_to_use = i;
1434 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1435}
1436
dfd341e4
JB		 1437static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1438{
1439 struct ixgb_adapter *adapter = netdev_priv(netdev);
1440 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1441
1442 netif_stop_queue(netdev);
1443 /* Herbert's original patch had:
1444 * smp_mb__after_netif_stop_queue();
1445 * but since that doesn't exist yet, just open code it. */
1446 smp_mb();
1447
1448 /* We need to check again in a case another CPU has just
1449 * made room available. */
1450 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1451 return -EBUSY;
1452
1453 /* A reprieve! */
1454 netif_start_queue(netdev);
1455 ++adapter->restart_queue;
1456 return 0;
1457}
1458
1459static int ixgb_maybe_stop_tx(struct net_device *netdev,
1460 struct ixgb_desc_ring *tx_ring, int size)
1461{
1462 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1463 return 0;
1464 return __ixgb_maybe_stop_tx(netdev, size);
1465}
1466
1467
1da177e4
LT		 1468/* Tx Descriptors needed, worst case */
1469#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1470 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1471#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1472 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1473 + 1 /* one more needed for sentinel TSO workaround */
1da177e4 1474
3b29a56d 1475static netdev_tx_t
1da177e4
LT		 1476ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1477{
8908c6cd 1478 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1479 unsigned int first;
1480 unsigned int tx_flags = 0;
1da177e4 1481 int vlan_id = 0;
fe52eeb8 1482 int count = 0;
1da177e4
LT		 1483 int tso;
1484
bab2bce7
JB		 1485 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1486 dev_kfree_skb(skb);
1487 return NETDEV_TX_OK;
1488 }
1489
03f83041 1490 if (skb->len <= 0) {
c2199340 1491 dev_kfree_skb(skb);
6ed10654 1492 return NETDEV_TX_OK;
1da177e4
LT		 1493 }
1494
dfd341e4 1495 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1496 DESC_NEEDED)))
f017f14b 1497 return NETDEV_TX_BUSY;
1da177e4 1498
03f83041 1499 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1da177e4
LT		 1500 tx_flags |= IXGB_TX_FLAGS_VLAN;
1501 vlan_id = vlan_tx_tag_get(skb);
1502 }
1503
1504 first = adapter->tx_ring.next_to_use;
0060c072 1505
1da177e4
LT		 1506 tso = ixgb_tso(adapter, skb);
1507 if (tso < 0) {
c2199340 1508 dev_kfree_skb(skb);
1da177e4
LT		 1509 return NETDEV_TX_OK;
1510 }
1511
96f9c2e2 1512 if (likely(tso))
1da177e4 1513 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1514 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1515 tx_flags |= IXGB_TX_FLAGS_CSUM;
1516
fe52eeb8 1517 count = ixgb_tx_map(adapter, skb, first);
1da177e4 1518
fe52eeb8
AD		 1519 if (count) {
1520 ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
fe52eeb8
AD		 1521 /* Make sure there is space in the ring for the next send. */
1522 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1da177e4 1523
fe52eeb8
AD		 1524 } else {
1525 dev_kfree_skb_any(skb);
1526 adapter->tx_ring.buffer_info[first].time_stamp = 0;
1527 adapter->tx_ring.next_to_use = first;
1528 }
f017f14b 1529
f017f14b 1530 return NETDEV_TX_OK;
1da177e4
LT		 1531}
1532
1533/**
1534 * ixgb_tx_timeout - Respond to a Tx Hang
1535 * @netdev: network interface device structure
1536 **/
1537
1538static void
1539ixgb_tx_timeout(struct net_device *netdev)
1540{
8908c6cd 1541 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1542
1543 /* Do the reset outside of interrupt context */
1544 schedule_work(&adapter->tx_timeout_task);
1545}
1546
1547static void
c4028958 1548ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1549{
c4028958
DH		 1550 struct ixgb_adapter *adapter =
1551 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1552
9b8118df 1553 adapter->tx_timeout_count++;
446490ca 1554 ixgb_down(adapter, true);
1da177e4
LT		 1555 ixgb_up(adapter);
1556}
1557
1558/**
1559 * ixgb_get_stats - Get System Network Statistics
1560 * @netdev: network interface device structure
1561 *
1562 * Returns the address of the device statistics structure.
1563 * The statistics are actually updated from the timer callback.
1564 **/
1565
1566static struct net_device_stats *
1567ixgb_get_stats(struct net_device *netdev)
1568{
0cdc0369 1569 return &netdev->stats;
1da177e4
LT		 1570}
1571
1572/**
1573 * ixgb_change_mtu - Change the Maximum Transfer Unit
1574 * @netdev: network interface device structure
1575 * @new_mtu: new value for maximum frame size
1576 *
1577 * Returns 0 on success, negative on failure
1578 **/
1579
1580static int
1581ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1582{
8908c6cd 1583 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1584 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1585 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1586
a65a604a
JB		 1587 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1588 if ((new_mtu < 68) ||
1589 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
6909c66d
JP		 1590 netif_err(adapter, probe, adapter->netdev,
1591 "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1592 return -EINVAL;
1593 }
1594
b5ca88eb
JB		 1595 if (old_max_frame == max_frame)
1596 return 0;
1597
1598 if (netif_running(netdev))
1599 ixgb_down(adapter, true);
1600
a3dc3da0 1601 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1602
1603 netdev->mtu = new_mtu;
1604
b5ca88eb 1605 if (netif_running(netdev))
1da177e4 1606 ixgb_up(adapter);
1da177e4
LT		 1607
1608 return 0;
1609}
1610
1611/**
1612 * ixgb_update_stats - Update the board statistics counters.
1613 * @adapter: board private structure
1614 **/
1615
1616void
1617ixgb_update_stats(struct ixgb_adapter *adapter)
1618{
5633684d 1619 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1620 struct pci_dev *pdev = adapter->pdev;
1621
1622 /* Prevent stats update while adapter is being reset */
81b1955e 1623 if (pci_channel_offline(pdev))
01748fbb 1624 return;
5633684d 1625
03f83041 1626 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
4cd24eaf 1627 (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
5633684d
MC		 1628 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1629 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1630 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1631 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1632
1633 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1634 /* fix up multicast stats by removing broadcasts */
03f83041 1635 if (multi >= bcast)
7b89178d 1636 multi -= bcast;
0060c072 1637
5633684d
MC		 1638 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1639 adapter->stats.mprch += (multi >> 32);
0060c072 1640 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1641 adapter->stats.bprch += bcast_h;
1642 } else {
1643 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1644 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1645 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1646 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1647 }
1da177e4
LT		 1648 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1649 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1650 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1651 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1652 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1653 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1654 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1655 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1656 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1657 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1658 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1659 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1660 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1661 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1662 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1663 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1664 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1665 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1666 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1667 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1668 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1669 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1670 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1671 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1672 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1673 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1674 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1675 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1676 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1677 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1678 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1679 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1680 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1681 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1682 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1683 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1684 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1685 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1686 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1687 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1688 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1689 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1690 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1691 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1692 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1693 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1694 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1695 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1696 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1697 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1698 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1699 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1700 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1701 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1702 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1703 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1704
1705 /* Fill out the OS statistics structure */
1706
0cdc0369
AK		 1707 netdev->stats.rx_packets = adapter->stats.gprcl;
1708 netdev->stats.tx_packets = adapter->stats.gptcl;
1709 netdev->stats.rx_bytes = adapter->stats.gorcl;
1710 netdev->stats.tx_bytes = adapter->stats.gotcl;
1711 netdev->stats.multicast = adapter->stats.mprcl;
1712 netdev->stats.collisions = 0;
1da177e4
LT		 1713
1714 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1715 * with a length in the type/len field */
0cdc0369 1716 netdev->stats.rx_errors =
1da177e4
LT		 1717 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1718 adapter->stats.ruc +
1719 adapter->stats.roc /*+ adapter->stats.rlec */ +
1720 adapter->stats.icbc +
1721 adapter->stats.ecbc + adapter->stats.mpc;
1722
1da177e4 1723 /* see above
0cdc0369 1724 * netdev->stats.rx_length_errors = adapter->stats.rlec;
1da177e4
LT		 1725 */
1726
0cdc0369
AK		 1727 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
1728 netdev->stats.rx_fifo_errors = adapter->stats.mpc;
1729 netdev->stats.rx_missed_errors = adapter->stats.mpc;
1730 netdev->stats.rx_over_errors = adapter->stats.mpc;
1731
1732 netdev->stats.tx_errors = 0;
1733 netdev->stats.rx_frame_errors = 0;
1734 netdev->stats.tx_aborted_errors = 0;
1735 netdev->stats.tx_carrier_errors = 0;
1736 netdev->stats.tx_fifo_errors = 0;
1737 netdev->stats.tx_heartbeat_errors = 0;
1738 netdev->stats.tx_window_errors = 0;
1da177e4
LT		 1739}
1740
1741#define IXGB_MAX_INTR 10
1742/**
1743 * ixgb_intr - Interrupt Handler
1744 * @irq: interrupt number
1745 * @data: pointer to a network interface device structure
1da177e4
LT		 1746 **/
1747
1748static irqreturn_t
7d12e780 1749ixgb_intr(int irq, void *data)
1da177e4
LT		 1750{
1751 struct net_device *netdev = data;
8908c6cd 1752 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1753 struct ixgb_hw *hw = &adapter->hw;
222441a6 1754 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4 1755
03f83041 1756 if (unlikely(!icr))
1da177e4
LT		 1757 return IRQ_NONE; /* Not our interrupt */
1758
bab2bce7
JB		 1759 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1760 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1761 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4 1762
288379f0 1763 if (napi_schedule_prep(&adapter->napi)) {
1da177e4 1764
0060c072 1765 /* Disable interrupts and register for poll. The flush
1da177e4
LT		 1766 of the posted write is intentionally left out.
1767 */
1768
1da177e4 1769 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
288379f0 1770 __napi_schedule(&adapter->napi);
1da177e4 1771 }
1da177e4
LT		 1772 return IRQ_HANDLED;
1773}
1774
1da177e4
LT		 1775/**
1776 * ixgb_clean - NAPI Rx polling callback
1777 * @adapter: board private structure
1778 **/
1779
1780static int
bea3348e 1781ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1782{
bea3348e 1783 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1da177e4
LT		 1784 int work_done = 0;
1785
53e52c72 1786 ixgb_clean_tx_irq(adapter);
bea3348e 1787 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1788
53e52c72
DM		 1789 /* If budget not fully consumed, exit the polling mode */
1790 if (work_done < budget) {
288379f0 1791 napi_complete(napi);
72ab5195
JB		 1792 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1793 ixgb_irq_enable(adapter);
1da177e4
LT		 1794 }
1795
bea3348e 1796 return work_done;
1da177e4 1797}
1da177e4
LT		 1798
1799/**
1800 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1801 * @adapter: board private structure
1802 **/
1803
446490ca 1804static bool
1da177e4
LT		 1805ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1806{
1807 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1808 struct net_device *netdev = adapter->netdev;
1809 struct ixgb_tx_desc *tx_desc, *eop_desc;
1810 struct ixgb_buffer *buffer_info;
1811 unsigned int i, eop;
446490ca 1812 bool cleaned = false;
1da177e4
LT		 1813
1814 i = tx_ring->next_to_clean;
1815 eop = tx_ring->buffer_info[i].next_to_watch;
1816 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1817
9a432992 1818 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1819
2d0bb1c1 1820 rmb(); /* read buffer_info after eop_desc */
446490ca 1821 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1822 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1823 buffer_info = &tx_ring->buffer_info[i];
1824
0060c072
JB		 1825 if (tx_desc->popts &
1826 (IXGB_TX_DESC_POPTS_TXSM |
1827 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1828 adapter->hw_csum_tx_good++;
1829
1830 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1831
222441a6 1832 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1833
1834 cleaned = (i == eop);
03f83041 1835 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1836 }
1837
1838 eop = tx_ring->buffer_info[i].next_to_watch;
1839 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1840 }
1841
1842 tx_ring->next_to_clean = i;
1843
0f8ecbad
JB		 1844 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1845 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1846 /* Make sure that anybody stopping the queue after this
1847 * sees the new next_to_clean. */
1848 smp_mb();
1849
1850 if (netif_queue_stopped(netdev) &&
1851 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1852 netif_wake_queue(netdev);
0f8ecbad
JB		 1853 ++adapter->restart_queue;
1854 }
1da177e4 1855 }
1da177e4 1856
03f83041 1857 if (adapter->detect_tx_hung) {
1da177e4
LT		 1858 /* detect a transmit hang in hardware, this serializes the
1859 * check with the clearing of time_stamp and movement of i */
446490ca 1860 adapter->detect_tx_hung = false;
fe52eeb8 1861 if (tx_ring->buffer_info[eop].time_stamp &&
9b8118df 1862 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1863 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1864 IXGB_STATUS_TXOFF)) {
1865 /* detected Tx unit hang */
6909c66d
JP		 1866 netif_err(adapter, drv, adapter->netdev,
1867 "Detected Tx Unit Hang\n"
1868 " TDH <%x>\n"
1869 " TDT <%x>\n"
1870 " next_to_use <%x>\n"
1871 " next_to_clean <%x>\n"
1872 "buffer_info[next_to_clean]\n"
1873 " time_stamp <%lx>\n"
1874 " next_to_watch <%x>\n"
1875 " jiffies <%lx>\n"
1876 " next_to_watch.status <%x>\n",
1877 IXGB_READ_REG(&adapter->hw, TDH),
1878 IXGB_READ_REG(&adapter->hw, TDT),
1879 tx_ring->next_to_use,
1880 tx_ring->next_to_clean,
1881 tx_ring->buffer_info[eop].time_stamp,
1882 eop,
1883 jiffies,
1884 eop_desc->status);
1da177e4 1885 netif_stop_queue(netdev);
9b8118df 1886 }
1da177e4
LT		 1887 }
1888
1889 return cleaned;
1890}
1891
1892/**
1893 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1894 * @adapter: board private structure
1895 * @rx_desc: receive descriptor
1896 * @sk_buff: socket buffer with received data
1897 **/
1898
235949d1 1899static void
1da177e4 1900ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1901 struct ixgb_rx_desc *rx_desc,
1902 struct sk_buff *skb)
1da177e4
LT		 1903{
1904 /* Ignore Checksum bit is set OR
1905 * TCP Checksum has not been calculated
1906 */
03f83041 1907 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4 1908 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
bc8acf2c 1909 skb_checksum_none_assert(skb);
1da177e4
LT		 1910 return;
1911 }
1912
1913 /* At this point we know the hardware did the TCP checksum */
1914 /* now look at the TCP checksum error bit */
03f83041 1915 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4 1916 /* let the stack verify checksum errors */
bc8acf2c 1917 skb_checksum_none_assert(skb);
1da177e4
LT		 1918 adapter->hw_csum_rx_error++;
1919 } else {
1920 /* TCP checksum is good */
1921 skb->ip_summed = CHECKSUM_UNNECESSARY;
1922 adapter->hw_csum_rx_good++;
1923 }
1924}
1925
57bf6eef
JP		 1926/*
1927 * this should improve performance for small packets with large amounts
1928 * of reassembly being done in the stack
1929 */
1930static void ixgb_check_copybreak(struct net_device *netdev,
1931 struct ixgb_buffer *buffer_info,
1932 u32 length, struct sk_buff **skb)
1933{
1934 struct sk_buff *new_skb;
1935
1936 if (length > copybreak)
1937 return;
1938
1939 new_skb = netdev_alloc_skb_ip_align(netdev, length);
1940 if (!new_skb)
1941 return;
1942
1943 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
1944 (*skb)->data - NET_IP_ALIGN,
1945 length + NET_IP_ALIGN);
1946 /* save the skb in buffer_info as good */
1947 buffer_info->skb = *skb;
1948 *skb = new_skb;
1949}
1950
1da177e4
LT		 1951/**
1952 * ixgb_clean_rx_irq - Send received data up the network stack,
1953 * @adapter: board private structure
1954 **/
1955
446490ca 1956static bool
1da177e4 1957ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1da177e4
LT		 1958{
1959 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1960 struct net_device *netdev = adapter->netdev;
1961 struct pci_dev *pdev = adapter->pdev;
1962 struct ixgb_rx_desc *rx_desc, *next_rxd;
1963 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1964 u32 length;
1da177e4 1965 unsigned int i, j;
fc2d14e3 1966 int cleaned_count = 0;
446490ca 1967 bool cleaned = false;
1da177e4
LT		 1968
1969 i = rx_ring->next_to_clean;
1970 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1971 buffer_info = &rx_ring->buffer_info[i];
1972
9a432992 1973 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
fc2d14e3 1974 struct sk_buff *skb;
f404de1c 1975 u8 status;
1da177e4 1976
03f83041 1977 if (*work_done >= work_to_do)
1da177e4
LT		 1978 break;
1979
1980 (*work_done)++;
2d0bb1c1 1981 rmb(); /* read descriptor and rx_buffer_info after status DD */
f404de1c 1982 status = rx_desc->status;
1da177e4 1983 skb = buffer_info->skb;
1dfdd7df 1984 buffer_info->skb = NULL;
f404de1c 1985
fc2d14e3 1986 prefetch(skb->data - NET_IP_ALIGN);
1da177e4 1987
57bf6eef
JP		 1988 if (++i == rx_ring->count)
1989 i = 0;
1da177e4
LT		 1990 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1991 prefetch(next_rxd);
1992
57bf6eef
JP		 1993 j = i + 1;
1994 if (j == rx_ring->count)
1995 j = 0;
1da177e4
LT		 1996 next2_buffer = &rx_ring->buffer_info[j];
1997 prefetch(next2_buffer);
1998
1999 next_buffer = &rx_ring->buffer_info[i];
1da177e4 2000
446490ca 2001 cleaned = true;
fc2d14e3 2002 cleaned_count++;
1da177e4 2003
47631f85 2004 dma_unmap_single(&pdev->dev,
1da177e4
LT		 2005 buffer_info->dma,
2006 buffer_info->length,
47631f85 2007 DMA_FROM_DEVICE);
fc2d14e3 2008 buffer_info->dma = 0;
1da177e4
LT		 2009
2010 length = le16_to_cpu(rx_desc->length);
fc2d14e3 2011 rx_desc->length = 0;
1da177e4 2012
03f83041 2013 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 2014
2015 /* All receives must fit into a single buffer */
2016
2017 IXGB_DBG("Receive packet consumed multiple buffers "
2018 "length<%x>\n", length);
2019
2020 dev_kfree_skb_irq(skb);
f404de1c 2021 goto rxdesc_done;
1da177e4
LT		 2022 }
2023
0060c072
JB		 2024 if (unlikely(rx_desc->errors &
2025 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
2026 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 2027 dev_kfree_skb_irq(skb);
f404de1c 2028 goto rxdesc_done;
1da177e4
LT		 2029 }
2030
57bf6eef 2031 ixgb_check_copybreak(netdev, buffer_info, length, &skb);
6b900bb4 2032
1da177e4
LT		 2033 /* Good Receive */
2034 skb_put(skb, length);
2035
2036 /* Receive Checksum Offload */
2037 ixgb_rx_checksum(adapter, rx_desc, skb);
2038
2039 skb->protocol = eth_type_trans(skb, netdev);
03f83041 2040 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2041 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
0060c072 2042 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2043 } else {
2044 netif_receive_skb(skb);
2045 }
1da177e4 2046
f404de1c
MC		 2047rxdesc_done:
2048 /* clean up descriptor, might be written over by hw */
1da177e4 2049 rx_desc->status = 0;
1da177e4 2050
fc2d14e3
JB		 2051 /* return some buffers to hardware, one at a time is too slow */
2052 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
2053 ixgb_alloc_rx_buffers(adapter, cleaned_count);
2054 cleaned_count = 0;
2055 }
2056
f404de1c 2057 /* use prefetched values */
1da177e4
LT		 2058 rx_desc = next_rxd;
2059 buffer_info = next_buffer;
2060 }
2061
2062 rx_ring->next_to_clean = i;
2063
fc2d14e3
JB		 2064 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2065 if (cleaned_count)
2066 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1da177e4
LT		 2067
2068 return cleaned;
2069}
2070
2071/**
2072 * ixgb_alloc_rx_buffers - Replace used receive buffers
2073 * @adapter: address of board private structure
2074 **/
2075
2076static void
fc2d14e3 2077ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
1da177e4
LT		 2078{
2079 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2080 struct net_device *netdev = adapter->netdev;
2081 struct pci_dev *pdev = adapter->pdev;
2082 struct ixgb_rx_desc *rx_desc;
2083 struct ixgb_buffer *buffer_info;
2084 struct sk_buff *skb;
2085 unsigned int i;
1da177e4
LT		 2086 long cleancount;
2087
2088 i = rx_ring->next_to_use;
2089 buffer_info = &rx_ring->buffer_info[i];
2090 cleancount = IXGB_DESC_UNUSED(rx_ring);
2091
1da177e4 2092
41639fed 2093 /* leave three descriptors unused */
fc2d14e3 2094 while (--cleancount > 2 && cleaned_count--) {
1dfdd7df 2095 /* recycle! its good for you */
69c7a940
AK		 2096 skb = buffer_info->skb;
2097 if (skb) {
1dfdd7df
AK		 2098 skb_trim(skb, 0);
2099 goto map_skb;
2100 }
1da177e4 2101
89d71a66 2102 skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
1dfdd7df 2103 if (unlikely(!skb)) {
1da177e4 2104 /* Better luck next round */
1dfdd7df 2105 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2106 break;
2107 }
2108
1da177e4
LT		 2109 buffer_info->skb = skb;
2110 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df 2111map_skb:
47631f85 2112 buffer_info->dma = dma_map_single(&pdev->dev,
1dfdd7df
AK		 2113 skb->data,
2114 adapter->rx_buffer_len,
47631f85 2115 DMA_FROM_DEVICE);
1da177e4 2116
1dfdd7df 2117 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2118 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2119 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2120 * this is the rest of the workaround for h/w double
41639fed
MC		 2121 * writeback. */
2122 rx_desc->status = 0;
1da177e4 2123
1da177e4 2124
03f83041 2125 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2126 buffer_info = &rx_ring->buffer_info[i];
2127 }
2128
1dfdd7df
AK		 2129 if (likely(rx_ring->next_to_use != i)) {
2130 rx_ring->next_to_use = i;
2131 if (unlikely(i-- == 0))
2132 i = (rx_ring->count - 1);
2133
2134 /* Force memory writes to complete before letting h/w
2135 * know there are new descriptors to fetch. (Only
2136 * applicable for weak-ordered memory model archs, such
2137 * as IA-64). */
2138 wmb();
2139 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2140 }
1da177e4
LT		 2141}
2142
2143/**
2144 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
0060c072 2145 *
1da177e4
LT		 2146 * @param netdev network interface device structure
2147 * @param grp indicates to enable or disable tagging/stripping
2148 **/
2149static void
2150ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2151{
8908c6cd 2152 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2153 u32 ctrl, rctl;
1da177e4
LT		 2154
2155 ixgb_irq_disable(adapter);
2156 adapter->vlgrp = grp;
2157
03f83041 2158 if (grp) {
1da177e4
LT		 2159 /* enable VLAN tag insert/strip */
2160 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2161 ctrl |= IXGB_CTRL0_VME;
2162 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2163
2164 /* enable VLAN receive filtering */
2165
2166 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
1da177e4
LT		 2167 rctl &= ~IXGB_RCTL_CFIEN;
2168 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2169 } else {
2170 /* disable VLAN tag insert/strip */
2171
2172 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2173 ctrl &= ~IXGB_CTRL0_VME;
2174 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
1da177e4
LT		 2175 }
2176
bab2bce7
JB		 2177 /* don't enable interrupts unless we are UP */
2178 if (adapter->netdev->flags & IFF_UP)
2179 ixgb_irq_enable(adapter);
1da177e4
LT		 2180}
2181
2182static void
222441a6 2183ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2184{
8908c6cd 2185 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2186 u32 vfta, index;
1da177e4
LT		 2187
2188 /* add VID to filter table */
2189
2190 index = (vid >> 5) & 0x7F;
2191 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2192 vfta |= (1 << (vid & 0x1F));
2193 ixgb_write_vfta(&adapter->hw, index, vfta);
2194}
2195
2196static void
222441a6 2197ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2198{
8908c6cd 2199 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2200 u32 vfta, index;
1da177e4
LT		 2201
2202 ixgb_irq_disable(adapter);
2203
5c15bdec 2204 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 2205
bab2bce7
JB		 2206 /* don't enable interrupts unless we are UP */
2207 if (adapter->netdev->flags & IFF_UP)
2208 ixgb_irq_enable(adapter);
1da177e4 2209
bab2bce7 2210 /* remove VID from filter table */
1da177e4
LT		 2211
2212 index = (vid >> 5) & 0x7F;
2213 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2214 vfta &= ~(1 << (vid & 0x1F));
2215 ixgb_write_vfta(&adapter->hw, index, vfta);
2216}
2217
2218static void
2219ixgb_restore_vlan(struct ixgb_adapter *adapter)
2220{
2221 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2222
03f83041 2223 if (adapter->vlgrp) {
222441a6 2224 u16 vid;
b738127d 2225 for (vid = 0; vid < VLAN_N_VID; vid++) {
03f83041 2226 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2227 continue;
2228 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2229 }
2230 }
2231}
2232
1da177e4
LT		 2233#ifdef CONFIG_NET_POLL_CONTROLLER
2234/*
2235 * Polling 'interrupt' - used by things like netconsole to send skbs
2236 * without having to re-enable interrupts. It's not called while
2237 * the interrupt routine is executing.
2238 */
2239
2240static void ixgb_netpoll(struct net_device *dev)
2241{
f990b426 2242 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2243
1da177e4 2244 disable_irq(adapter->pdev->irq);
7d12e780 2245 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2246 enable_irq(adapter->pdev->irq);
2247}
2248#endif
2249
01748fbb
LV		 2250/**
2251 * ixgb_io_error_detected() - called when PCI error is detected
2252 * @pdev pointer to pci device with error
2253 * @state pci channel state after error
2254 *
2255 * This callback is called by the PCI subsystem whenever
2256 * a PCI bus error is detected.
2257 */
0060c072
JB		 2258static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2259 enum pci_channel_state state)
01748fbb
LV		 2260{
2261 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2262 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2263
d6a1f83b
DN		 2264 netif_device_detach(netdev);
2265
2266 if (state == pci_channel_io_perm_failure)
2267 return PCI_ERS_RESULT_DISCONNECT;
2268
03f83041 2269 if (netif_running(netdev))
446490ca 2270 ixgb_down(adapter, true);
01748fbb
LV		 2271
2272 pci_disable_device(pdev);
2273
2274 /* Request a slot reset. */
2275 return PCI_ERS_RESULT_NEED_RESET;
2276}
2277
2278/**
2279 * ixgb_io_slot_reset - called after the pci bus has been reset.
2280 * @pdev pointer to pci device with error
2281 *
52035bdb 2282 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2283 * Basically, this tries to restart the card from scratch.
2284 * This is a shortened version of the device probe/discovery code,
2285 * it resembles the first-half of the ixgb_probe() routine.
2286 */
0060c072 2287static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2288{
2289 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2290 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2291
03f83041 2292 if (pci_enable_device(pdev)) {
6909c66d
JP		 2293 netif_err(adapter, probe, adapter->netdev,
2294 "Cannot re-enable PCI device after reset\n");
01748fbb
LV		 2295 return PCI_ERS_RESULT_DISCONNECT;
2296 }
2297
2298 /* Perform card reset only on one instance of the card */
2299 if (0 != PCI_FUNC (pdev->devfn))
2300 return PCI_ERS_RESULT_RECOVERED;
2301
2302 pci_set_master(pdev);
2303
2304 netif_carrier_off(netdev);
2305 netif_stop_queue(netdev);
2306 ixgb_reset(adapter);
2307
2308 /* Make sure the EEPROM is good */
03f83041 2309 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
6909c66d
JP		 2310 netif_err(adapter, probe, adapter->netdev,
2311 "After reset, the EEPROM checksum is not valid\n");
01748fbb
LV		 2312 return PCI_ERS_RESULT_DISCONNECT;
2313 }
2314 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2315 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2316
03f83041 2317 if (!is_valid_ether_addr(netdev->perm_addr)) {
6909c66d
JP		 2318 netif_err(adapter, probe, adapter->netdev,
2319 "After reset, invalid MAC address\n");
01748fbb
LV		 2320 return PCI_ERS_RESULT_DISCONNECT;
2321 }
2322
2323 return PCI_ERS_RESULT_RECOVERED;
2324}
2325
2326/**
2327 * ixgb_io_resume - called when its OK to resume normal operations
2328 * @pdev pointer to pci device with error
2329 *
2330 * The error recovery driver tells us that its OK to resume
2331 * normal operation. Implementation resembles the second-half
2332 * of the ixgb_probe() routine.
2333 */
0060c072 2334static void ixgb_io_resume(struct pci_dev *pdev)
01748fbb
LV		 2335{
2336 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2337 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2338
2339 pci_set_master(pdev);
2340
03f83041
JB		 2341 if (netif_running(netdev)) {
2342 if (ixgb_up(adapter)) {
d328bc83 2343 pr_err("can't bring device back up after reset\n");
01748fbb
LV		 2344 return;
2345 }
2346 }
2347
2348 netif_device_attach(netdev);
2349 mod_timer(&adapter->watchdog_timer, jiffies);
2350}
2351
1da177e4 2352/* ixgb_main.c */
ubuntu-bionic-kernel mirror