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ixgb: clean up assignments inside if statements
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / ixgb / ixgb_main.c
CommitLineData
1da177e4
LT		 1/*******************************************************************************
2
0abb6eb1
AK		 3 Intel PRO/10GbE Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
1da177e4 13 more details.
0abb6eb1 14
1da177e4 15 You should have received a copy of the GNU General Public License along with
0abb6eb1
AK		 16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
1da177e4
LT		 22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
0abb6eb1 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
1da177e4
LT		 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
29#include "ixgb.h"
30
1da177e4 31char ixgb_driver_name[] = "ixgb";
e9ab1d14 32static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
1da177e4
LT		 33
34#ifndef CONFIG_IXGB_NAPI
35#define DRIVERNAPI
36#else
37#define DRIVERNAPI "-NAPI"
38#endif
8b32e63d 39#define DRV_VERSION "1.0.126-k4"DRIVERNAPI
273dc74e
SH		 40const char ixgb_driver_version[] = DRV_VERSION;
41static const char ixgb_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
1da177e4 42
d9fed18b
JB		 43#define IXGB_CB_LENGTH 256
44static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
45module_param(copybreak, uint, 0644);
46MODULE_PARM_DESC(copybreak,
47 "Maximum size of packet that is copied to a new buffer on receive");
48
1da177e4
LT		 49/* ixgb_pci_tbl - PCI Device ID Table
50 *
51 * Wildcard entries (PCI_ANY_ID) should come last
52 * Last entry must be all 0s
53 *
54 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
55 * Class, Class Mask, private data (not used) }
56 */
57static struct pci_device_id ixgb_pci_tbl[] = {
58 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
59 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
940829e2
AK		 60 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
61 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1da177e4
LT		 62 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
63 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
7490d71a 64 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
1da177e4
LT		 65 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
66
67 /* required last entry */
68 {0,}
69};
70
71MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
72
73/* Local Function Prototypes */
1da177e4
LT		 74static int ixgb_init_module(void);
75static void ixgb_exit_module(void);
76static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
77static void __devexit ixgb_remove(struct pci_dev *pdev);
78static int ixgb_sw_init(struct ixgb_adapter *adapter);
79static int ixgb_open(struct net_device *netdev);
80static int ixgb_close(struct net_device *netdev);
81static void ixgb_configure_tx(struct ixgb_adapter *adapter);
82static void ixgb_configure_rx(struct ixgb_adapter *adapter);
83static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
84static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
85static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
86static void ixgb_set_multi(struct net_device *netdev);
87static void ixgb_watchdog(unsigned long data);
88static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
89static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
90static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
91static int ixgb_set_mac(struct net_device *netdev, void *p);
7d12e780 92static irqreturn_t ixgb_intr(int irq, void *data);
446490ca 93static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
ac79c82e 94
1da177e4 95#ifdef CONFIG_IXGB_NAPI
7490d71a
JB		 96static int ixgb_clean(struct napi_struct *, int);
97static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
1da177e4 98#else
7490d71a 99static bool ixgb_clean_rx_irq(struct ixgb_adapter *);
1da177e4 100#endif
fc2d14e3 101static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);
7490d71a 102
1da177e4 103static void ixgb_tx_timeout(struct net_device *dev);
c4028958 104static void ixgb_tx_timeout_task(struct work_struct *work);
7490d71a 105
1da177e4 106static void ixgb_vlan_rx_register(struct net_device *netdev,
7490d71a 107 struct vlan_group *grp);
222441a6
JP		 108static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
109static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
1da177e4
LT		 110static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
111
1da177e4
LT		 112#ifdef CONFIG_NET_POLL_CONTROLLER
113/* for netdump / net console */
114static void ixgb_netpoll(struct net_device *dev);
115#endif
116
01748fbb 117static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
7490d71a 118 enum pci_channel_state state);
01748fbb
LV		 119static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
120static void ixgb_io_resume (struct pci_dev *pdev);
1da177e4 121
01748fbb
LV		 122static struct pci_error_handlers ixgb_err_handler = {
123 .error_detected = ixgb_io_error_detected,
124 .slot_reset = ixgb_io_slot_reset,
125 .resume = ixgb_io_resume,
126};
127
1da177e4 128static struct pci_driver ixgb_driver = {
c2eba932 129 .name = ixgb_driver_name,
1da177e4 130 .id_table = ixgb_pci_tbl,
c2eba932
MC		 131 .probe = ixgb_probe,
132 .remove = __devexit_p(ixgb_remove),
01748fbb 133 .err_handler = &ixgb_err_handler
1da177e4
LT		 134};
135
136MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
137MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
138MODULE_LICENSE("GPL");
01e5abc2 139MODULE_VERSION(DRV_VERSION);
1da177e4 140
ec9c3f5d
AK		 141#define DEFAULT_DEBUG_LEVEL_SHIFT 3
142static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
143module_param(debug, int, 0);
144MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
145
1da177e4
LT		 146/**
147 * ixgb_init_module - Driver Registration Routine
148 *
149 * ixgb_init_module is the first routine called when the driver is
150 * loaded. All it does is register with the PCI subsystem.
151 **/
152
153static int __init
154ixgb_init_module(void)
155{
1da177e4
LT		 156 printk(KERN_INFO "%s - version %s\n",
157 ixgb_driver_string, ixgb_driver_version);
158
159 printk(KERN_INFO "%s\n", ixgb_copyright);
160
29917620 161 return pci_register_driver(&ixgb_driver);
1da177e4
LT		 162}
163
164module_init(ixgb_init_module);
165
166/**
167 * ixgb_exit_module - Driver Exit Cleanup Routine
168 *
169 * ixgb_exit_module is called just before the driver is removed
170 * from memory.
171 **/
172
173static void __exit
174ixgb_exit_module(void)
175{
1da177e4
LT		 176 pci_unregister_driver(&ixgb_driver);
177}
178
179module_exit(ixgb_exit_module);
180
181/**
182 * ixgb_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
184 **/
185
235949d1 186static void
1da177e4
LT		 187ixgb_irq_disable(struct ixgb_adapter *adapter)
188{
1da177e4
LT		 189 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
190 IXGB_WRITE_FLUSH(&adapter->hw);
191 synchronize_irq(adapter->pdev->irq);
192}
193
194/**
195 * ixgb_irq_enable - Enable default interrupt generation settings
196 * @adapter: board private structure
197 **/
198
235949d1 199static void
1da177e4
LT		 200ixgb_irq_enable(struct ixgb_adapter *adapter)
201{
9c61a9dc
JB		 202 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
203 IXGB_INT_TXDW | IXGB_INT_LSC;
204 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
205 val |= IXGB_INT_GPI0;
206 IXGB_WRITE_REG(&adapter->hw, IMS, val);
207 IXGB_WRITE_FLUSH(&adapter->hw);
1da177e4
LT		 208}
209
210int
211ixgb_up(struct ixgb_adapter *adapter)
212{
213 struct net_device *netdev = adapter->netdev;
fb136c07 214 int err, irq_flags = IRQF_SHARED;
1da177e4
LT		 215 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
216 struct ixgb_hw *hw = &adapter->hw;
217
218 /* hardware has been reset, we need to reload some things */
219
8556f0d1 220 ixgb_rar_set(hw, netdev->dev_addr, 0);
1da177e4
LT		 221 ixgb_set_multi(netdev);
222
223 ixgb_restore_vlan(adapter);
224
225 ixgb_configure_tx(adapter);
226 ixgb_setup_rctl(adapter);
227 ixgb_configure_rx(adapter);
fc2d14e3 228 ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));
1da177e4 229
e59d1696
AK		 230 /* disable interrupts and get the hardware into a known state */
231 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
232
fb136c07
AK		 233 /* only enable MSI if bus is in PCI-X mode */
234 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
235 err = pci_enable_msi(adapter->pdev);
236 if (!err) {
237 adapter->have_msi = 1;
238 irq_flags = 0;
239 }
1da177e4
LT		 240 /* proceed to try to request regular interrupt */
241 }
1da177e4 242
fb136c07
AK		 243 err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
244 netdev->name, netdev);
245 if (err) {
246 if (adapter->have_msi)
247 pci_disable_msi(adapter->pdev);
ec9c3f5d
AK		 248 DPRINTK(PROBE, ERR,
249 "Unable to allocate interrupt Error: %d\n", err);
1da177e4 250 return err;
ec9c3f5d 251 }
1da177e4 252
03f83041 253 if ((hw->max_frame_size != max_frame) ||
1da177e4
LT		 254 (hw->max_frame_size !=
255 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
256
257 hw->max_frame_size = max_frame;
258
259 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
260
03f83041 261 if (hw->max_frame_size >
1da177e4 262 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
222441a6 263 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
1da177e4 264
03f83041 265 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
1da177e4
LT		 266 ctrl0 |= IXGB_CTRL0_JFE;
267 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
268 }
269 }
270 }
271
bab2bce7 272 clear_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 273
274#ifdef CONFIG_IXGB_NAPI
bea3348e 275 napi_enable(&adapter->napi);
1da177e4 276#endif
e59d1696
AK		 277 ixgb_irq_enable(adapter);
278
bab2bce7
JB		 279 mod_timer(&adapter->watchdog_timer, jiffies);
280
1da177e4
LT		 281 return 0;
282}
283
284void
446490ca 285ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
1da177e4
LT		 286{
287 struct net_device *netdev = adapter->netdev;
288
bab2bce7
JB		 289 /* prevent the interrupt handler from restarting watchdog */
290 set_bit(__IXGB_DOWN, &adapter->flags);
291
49d85c50
DM		 292#ifdef CONFIG_IXGB_NAPI
293 napi_disable(&adapter->napi);
49d85c50 294#endif
bab2bce7 295 /* waiting for NAPI to complete can re-enable interrupts */
1da177e4
LT		 296 ixgb_irq_disable(adapter);
297 free_irq(adapter->pdev->irq, netdev);
fb136c07
AK		 298
299 if (adapter->have_msi)
1da177e4
LT		 300 pci_disable_msi(adapter->pdev);
301
03f83041 302 if (kill_watchdog)
1da177e4 303 del_timer_sync(&adapter->watchdog_timer);
49d85c50 304
1da177e4
LT		 305 adapter->link_speed = 0;
306 adapter->link_duplex = 0;
307 netif_carrier_off(netdev);
308 netif_stop_queue(netdev);
309
310 ixgb_reset(adapter);
311 ixgb_clean_tx_ring(adapter);
312 ixgb_clean_rx_ring(adapter);
313}
314
315void
316ixgb_reset(struct ixgb_adapter *adapter)
317{
3fd7131f 318 struct ixgb_hw *hw = &adapter->hw;
1da177e4 319
3fd7131f
MW		 320 ixgb_adapter_stop(hw);
321 if (!ixgb_init_hw(hw))
ec9c3f5d 322 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
3fd7131f
MW		 323
324 /* restore frame size information */
325 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
326 if (hw->max_frame_size >
327 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
328 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
329 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
330 ctrl0 |= IXGB_CTRL0_JFE;
331 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
332 }
333 }
1da177e4
LT		 334}
335
336/**
337 * ixgb_probe - Device Initialization Routine
338 * @pdev: PCI device information struct
339 * @ent: entry in ixgb_pci_tbl
340 *
341 * Returns 0 on success, negative on failure
342 *
343 * ixgb_probe initializes an adapter identified by a pci_dev structure.
344 * The OS initialization, configuring of the adapter private structure,
345 * and a hardware reset occur.
346 **/
347
348static int __devinit
0060c072 349ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 350{
351 struct net_device *netdev = NULL;
352 struct ixgb_adapter *adapter;
353 static int cards_found = 0;
1da177e4
LT		 354 int pci_using_dac;
355 int i;
356 int err;
357
9e7bd330
JB		 358 err = pci_enable_device(pdev);
359 if (err)
1da177e4
LT		 360 return err;
361
03f83041 362 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
9e7bd330 363 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
1da177e4
LT		 364 pci_using_dac = 1;
365 } else {
03f83041 366 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
9e7bd330 367 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
ec9c3f5d
AK		 368 printk(KERN_ERR
369 "ixgb: No usable DMA configuration, aborting\n");
c91e468a 370 goto err_dma_mask;
1da177e4
LT		 371 }
372 pci_using_dac = 0;
373 }
374
9e7bd330
JB		 375 err = pci_request_regions(pdev, ixgb_driver_name);
376 if (err)
c91e468a 377 goto err_request_regions;
1da177e4
LT		 378
379 pci_set_master(pdev);
380
381 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
03f83041 382 if (!netdev) {
1da177e4
LT		 383 err = -ENOMEM;
384 goto err_alloc_etherdev;
385 }
386
1da177e4
LT		 387 SET_NETDEV_DEV(netdev, &pdev->dev);
388
389 pci_set_drvdata(pdev, netdev);
8908c6cd 390 adapter = netdev_priv(netdev);
1da177e4
LT		 391 adapter->netdev = netdev;
392 adapter->pdev = pdev;
393 adapter->hw.back = adapter;
ec9c3f5d 394 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
1da177e4 395
e539e466
JB		 396 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, BAR_0),
397 pci_resource_len(pdev, BAR_0));
398 if (!adapter->hw.hw_addr) {
1da177e4
LT		 399 err = -EIO;
400 goto err_ioremap;
401 }
402
1459336d 403 for (i = BAR_1; i <= BAR_5; i++) {
03f83041 404 if (pci_resource_len(pdev, i) == 0)
1da177e4 405 continue;
03f83041 406 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 407 adapter->hw.io_base = pci_resource_start(pdev, i);
408 break;
409 }
410 }
411
412 netdev->open = &ixgb_open;
413 netdev->stop = &ixgb_close;
414 netdev->hard_start_xmit = &ixgb_xmit_frame;
415 netdev->get_stats = &ixgb_get_stats;
416 netdev->set_multicast_list = &ixgb_set_multi;
417 netdev->set_mac_address = &ixgb_set_mac;
418 netdev->change_mtu = &ixgb_change_mtu;
419 ixgb_set_ethtool_ops(netdev);
420 netdev->tx_timeout = &ixgb_tx_timeout;
9b8118df 421 netdev->watchdog_timeo = 5 * HZ;
1da177e4 422#ifdef CONFIG_IXGB_NAPI
bea3348e 423 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4
LT		 424#endif
425 netdev->vlan_rx_register = ixgb_vlan_rx_register;
426 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
427 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
428#ifdef CONFIG_NET_POLL_CONTROLLER
429 netdev->poll_controller = ixgb_netpoll;
430#endif
431
0eb5a34c 432 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 433
434 adapter->bd_number = cards_found;
435 adapter->link_speed = 0;
436 adapter->link_duplex = 0;
437
438 /* setup the private structure */
439
9e7bd330
JB		 440 err = ixgb_sw_init(adapter);
441 if (err)
1da177e4
LT		 442 goto err_sw_init;
443
444 netdev->features = NETIF_F_SG |
445 NETIF_F_HW_CSUM |
446 NETIF_F_HW_VLAN_TX |
447 NETIF_F_HW_VLAN_RX |
448 NETIF_F_HW_VLAN_FILTER;
1da177e4 449 netdev->features |= NETIF_F_TSO;
1da177e4 450
03f83041 451 if (pci_using_dac)
1da177e4
LT		 452 netdev->features |= NETIF_F_HIGHDMA;
453
454 /* make sure the EEPROM is good */
455
03f83041 456 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
ec9c3f5d 457 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 458 err = -EIO;
459 goto err_eeprom;
460 }
461
462 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
df859c51 463 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1da177e4 464
03f83041 465 if (!is_valid_ether_addr(netdev->perm_addr)) {
ec9c3f5d 466 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1da177e4
LT		 467 err = -EIO;
468 goto err_eeprom;
469 }
470
471 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
472
473 init_timer(&adapter->watchdog_timer);
474 adapter->watchdog_timer.function = &ixgb_watchdog;
475 adapter->watchdog_timer.data = (unsigned long)adapter;
476
c4028958 477 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 478
ec9c3f5d 479 strcpy(netdev->name, "eth%d");
9e7bd330
JB		 480 err = register_netdev(netdev);
481 if (err)
1da177e4
LT		 482 goto err_register;
483
484 /* we're going to reset, so assume we have no link for now */
485
486 netif_carrier_off(netdev);
487 netif_stop_queue(netdev);
488
ec9c3f5d 489 DPRINTK(PROBE, INFO, "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);
536}
537
538/**
539 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
540 * @adapter: board private structure to initialize
541 *
542 * ixgb_sw_init initializes the Adapter private data structure.
543 * Fields are initialized based on PCI device information and
544 * OS network device settings (MTU size).
545 **/
546
547static int __devinit
548ixgb_sw_init(struct ixgb_adapter *adapter)
549{
550 struct ixgb_hw *hw = &adapter->hw;
551 struct net_device *netdev = adapter->netdev;
552 struct pci_dev *pdev = adapter->pdev;
553
554 /* PCI config space info */
555
556 hw->vendor_id = pdev->vendor;
557 hw->device_id = pdev->device;
558 hw->subsystem_vendor_id = pdev->subsystem_vendor;
559 hw->subsystem_id = pdev->subsystem_device;
560
1da177e4 561 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
a3dc3da0 562 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
1da177e4 563
03f83041 564 if ((hw->device_id == IXGB_DEVICE_ID_82597EX)
940829e2
AK		 565 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
566 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
567 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
0060c072 568 hw->mac_type = ixgb_82597;
1da177e4
LT		 569 else {
570 /* should never have loaded on this device */
ec9c3f5d 571 DPRINTK(PROBE, ERR, "unsupported device id\n");
1da177e4
LT		 572 }
573
574 /* enable flow control to be programmed */
575 hw->fc.send_xon = 1;
576
bab2bce7 577 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 578 return 0;
579}
580
581/**
582 * ixgb_open - Called when a network interface is made active
583 * @netdev: network interface device structure
584 *
585 * Returns 0 on success, negative value on failure
586 *
587 * The open entry point is called when a network interface is made
588 * active by the system (IFF_UP). At this point all resources needed
589 * for transmit and receive operations are allocated, the interrupt
590 * handler is registered with the OS, the watchdog timer is started,
591 * and the stack is notified that the interface is ready.
592 **/
593
594static int
595ixgb_open(struct net_device *netdev)
596{
8908c6cd 597 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 598 int err;
599
600 /* allocate transmit descriptors */
9e7bd330
JB		 601 err = ixgb_setup_tx_resources(adapter);
602 if (err)
1da177e4
LT		 603 goto err_setup_tx;
604
605 /* allocate receive descriptors */
606
9e7bd330
JB		 607 err = ixgb_setup_rx_resources(adapter);
608 if (err)
1da177e4
LT		 609 goto err_setup_rx;
610
9e7bd330
JB		 611 err = ixgb_up(adapter);
612 if (err)
1da177e4
LT		 613 goto err_up;
614
615 return 0;
616
617err_up:
618 ixgb_free_rx_resources(adapter);
619err_setup_rx:
620 ixgb_free_tx_resources(adapter);
621err_setup_tx:
622 ixgb_reset(adapter);
623
624 return err;
625}
626
627/**
628 * ixgb_close - Disables a network interface
629 * @netdev: network interface device structure
630 *
631 * Returns 0, this is not allowed to fail
632 *
633 * The close entry point is called when an interface is de-activated
634 * by the OS. The hardware is still under the drivers control, but
635 * needs to be disabled. A global MAC reset is issued to stop the
636 * hardware, and all transmit and receive resources are freed.
637 **/
638
639static int
640ixgb_close(struct net_device *netdev)
641{
8908c6cd 642 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 643
446490ca 644 ixgb_down(adapter, true);
1da177e4
LT		 645
646 ixgb_free_tx_resources(adapter);
647 ixgb_free_rx_resources(adapter);
648
649 return 0;
650}
651
652/**
653 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
654 * @adapter: board private structure
655 *
656 * Return 0 on success, negative on failure
657 **/
658
659int
660ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
661{
662 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
663 struct pci_dev *pdev = adapter->pdev;
664 int size;
665
666 size = sizeof(struct ixgb_buffer) * txdr->count;
667 txdr->buffer_info = vmalloc(size);
03f83041 668 if (!txdr->buffer_info) {
ec9c3f5d
AK		 669 DPRINTK(PROBE, ERR,
670 "Unable to allocate transmit descriptor ring memory\n");
1da177e4
LT		 671 return -ENOMEM;
672 }
673 memset(txdr->buffer_info, 0, size);
674
675 /* round up to nearest 4K */
676
677 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 678 txdr->size = ALIGN(txdr->size, 4096);
1da177e4
LT		 679
680 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
03f83041 681 if (!txdr->desc) {
1da177e4 682 vfree(txdr->buffer_info);
ec9c3f5d
AK		 683 DPRINTK(PROBE, ERR,
684 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 685 return -ENOMEM;
686 }
687 memset(txdr->desc, 0, txdr->size);
688
689 txdr->next_to_use = 0;
690 txdr->next_to_clean = 0;
691
692 return 0;
693}
694
695/**
696 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
697 * @adapter: board private structure
698 *
699 * Configure the Tx unit of the MAC after a reset.
700 **/
701
702static void
703ixgb_configure_tx(struct ixgb_adapter *adapter)
704{
222441a6
JP		 705 u64 tdba = adapter->tx_ring.dma;
706 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
707 u32 tctl;
1da177e4
LT		 708 struct ixgb_hw *hw = &adapter->hw;
709
0060c072
JB		 710 /* Setup the Base and Length of the Tx Descriptor Ring
711 * tx_ring.dma can be either a 32 or 64 bit value
1da177e4
LT		 712 */
713
714 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
715 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
716
717 IXGB_WRITE_REG(hw, TDLEN, tdlen);
718
719 /* Setup the HW Tx Head and Tail descriptor pointers */
720
721 IXGB_WRITE_REG(hw, TDH, 0);
722 IXGB_WRITE_REG(hw, TDT, 0);
723
724 /* don't set up txdctl, it induces performance problems if configured
725 * incorrectly */
726 /* Set the Tx Interrupt Delay register */
727
728 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
729
730 /* Program the Transmit Control Register */
731
732 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
733 IXGB_WRITE_REG(hw, TCTL, tctl);
734
735 /* Setup Transmit Descriptor Settings for this adapter */
736 adapter->tx_cmd_type =
0060c072
JB		 737 IXGB_TX_DESC_TYPE |
738 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
1da177e4
LT		 739}
740
741/**
742 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
743 * @adapter: board private structure
744 *
745 * Returns 0 on success, negative on failure
746 **/
747
748int
749ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
750{
751 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
752 struct pci_dev *pdev = adapter->pdev;
753 int size;
754
755 size = sizeof(struct ixgb_buffer) * rxdr->count;
756 rxdr->buffer_info = vmalloc(size);
03f83041 757 if (!rxdr->buffer_info) {
ec9c3f5d
AK		 758 DPRINTK(PROBE, ERR,
759 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 760 return -ENOMEM;
761 }
762 memset(rxdr->buffer_info, 0, size);
763
764 /* Round up to nearest 4K */
765
766 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 767 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4
LT		 768
769 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
770
03f83041 771 if (!rxdr->desc) {
1da177e4 772 vfree(rxdr->buffer_info);
ec9c3f5d
AK		 773 DPRINTK(PROBE, ERR,
774 "Unable to allocate receive descriptors\n");
1da177e4
LT		 775 return -ENOMEM;
776 }
777 memset(rxdr->desc, 0, rxdr->size);
778
779 rxdr->next_to_clean = 0;
780 rxdr->next_to_use = 0;
781
782 return 0;
783}
784
785/**
786 * ixgb_setup_rctl - configure the receive control register
787 * @adapter: Board private structure
788 **/
789
790static void
791ixgb_setup_rctl(struct ixgb_adapter *adapter)
792{
222441a6 793 u32 rctl;
1da177e4
LT		 794
795 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
796
797 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
798
799 rctl |=
0060c072
JB		 800 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
801 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
1da177e4
LT		 802 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
803
804 rctl |= IXGB_RCTL_SECRC;
805
3f3dc0dd 806 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 807 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 808 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 809 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 810 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 811 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 812 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 813 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 814
815 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
816}
817
818/**
819 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
820 * @adapter: board private structure
821 *
822 * Configure the Rx unit of the MAC after a reset.
823 **/
824
825static void
826ixgb_configure_rx(struct ixgb_adapter *adapter)
827{
222441a6
JP		 828 u64 rdba = adapter->rx_ring.dma;
829 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 830 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 831 u32 rctl;
832 u32 rxcsum;
1da177e4
LT		 833
834 /* make sure receives are disabled while setting up the descriptors */
835
836 rctl = IXGB_READ_REG(hw, RCTL);
837 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
838
839 /* set the Receive Delay Timer Register */
840
841 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
842
843 /* Setup the Base and Length of the Rx Descriptor Ring */
844
845 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
846 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
847
848 IXGB_WRITE_REG(hw, RDLEN, rdlen);
849
850 /* Setup the HW Rx Head and Tail Descriptor Pointers */
851 IXGB_WRITE_REG(hw, RDH, 0);
852 IXGB_WRITE_REG(hw, RDT, 0);
853
4360386f
JB		 854 /* due to the hardware errata with RXDCTL, we are unable to use any of
855 * the performance enhancing features of it without causing other
856 * subtle bugs, some of the bugs could include receive length
857 * corruption at high data rates (WTHRESH > 0) and/or receive
858 * descriptor ring irregularites (particularly in hardware cache) */
859 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 860
861 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 862 if (adapter->rx_csum) {
1da177e4
LT		 863 rxcsum = IXGB_READ_REG(hw, RXCSUM);
864 rxcsum |= IXGB_RXCSUM_TUOFL;
865 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
866 }
867
868 /* Enable Receives */
869
870 IXGB_WRITE_REG(hw, RCTL, rctl);
871}
872
873/**
874 * ixgb_free_tx_resources - Free Tx Resources
875 * @adapter: board private structure
876 *
877 * Free all transmit software resources
878 **/
879
880void
881ixgb_free_tx_resources(struct ixgb_adapter *adapter)
882{
883 struct pci_dev *pdev = adapter->pdev;
884
885 ixgb_clean_tx_ring(adapter);
886
887 vfree(adapter->tx_ring.buffer_info);
888 adapter->tx_ring.buffer_info = NULL;
889
890 pci_free_consistent(pdev, adapter->tx_ring.size,
891 adapter->tx_ring.desc, adapter->tx_ring.dma);
892
893 adapter->tx_ring.desc = NULL;
894}
895
235949d1 896static void
1da177e4 897ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
0060c072 898 struct ixgb_buffer *buffer_info)
1da177e4
LT		 899{
900 struct pci_dev *pdev = adapter->pdev;
1dfdd7df
AK		 901
902 if (buffer_info->dma)
903 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
904 PCI_DMA_TODEVICE);
905
906 if (buffer_info->skb)
1da177e4 907 dev_kfree_skb_any(buffer_info->skb);
1dfdd7df
AK		 908
909 buffer_info->skb = NULL;
910 buffer_info->dma = 0;
911 buffer_info->time_stamp = 0;
912 /* these fields must always be initialized in tx
913 * buffer_info->length = 0;
914 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 915}
916
917/**
918 * ixgb_clean_tx_ring - Free Tx Buffers
919 * @adapter: board private structure
920 **/
921
922static void
923ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
924{
925 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
926 struct ixgb_buffer *buffer_info;
927 unsigned long size;
928 unsigned int i;
929
930 /* Free all the Tx ring sk_buffs */
931
1459336d 932 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 933 buffer_info = &tx_ring->buffer_info[i];
934 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
935 }
936
937 size = sizeof(struct ixgb_buffer) * tx_ring->count;
938 memset(tx_ring->buffer_info, 0, size);
939
940 /* Zero out the descriptor ring */
941
942 memset(tx_ring->desc, 0, tx_ring->size);
943
944 tx_ring->next_to_use = 0;
945 tx_ring->next_to_clean = 0;
946
947 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
948 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
949}
950
951/**
952 * ixgb_free_rx_resources - Free Rx Resources
953 * @adapter: board private structure
954 *
955 * Free all receive software resources
956 **/
957
958void
959ixgb_free_rx_resources(struct ixgb_adapter *adapter)
960{
961 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
962 struct pci_dev *pdev = adapter->pdev;
963
964 ixgb_clean_rx_ring(adapter);
965
966 vfree(rx_ring->buffer_info);
967 rx_ring->buffer_info = NULL;
968
969 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
970
971 rx_ring->desc = NULL;
972}
973
974/**
975 * ixgb_clean_rx_ring - Free Rx Buffers
976 * @adapter: board private structure
977 **/
978
979static void
980ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
981{
982 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
983 struct ixgb_buffer *buffer_info;
984 struct pci_dev *pdev = adapter->pdev;
985 unsigned long size;
986 unsigned int i;
987
988 /* Free all the Rx ring sk_buffs */
989
1459336d 990 for (i = 0; i < rx_ring->count; i++) {
1da177e4 991 buffer_info = &rx_ring->buffer_info[i];
03f83041 992 if (buffer_info->skb) {
1da177e4
LT		 993
994 pci_unmap_single(pdev,
995 buffer_info->dma,
996 buffer_info->length,
997 PCI_DMA_FROMDEVICE);
998
999 dev_kfree_skb(buffer_info->skb);
1000
1001 buffer_info->skb = NULL;
1002 }
1003 }
1004
1005 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1006 memset(rx_ring->buffer_info, 0, size);
1007
1008 /* Zero out the descriptor ring */
1009
1010 memset(rx_ring->desc, 0, rx_ring->size);
1011
1012 rx_ring->next_to_clean = 0;
1013 rx_ring->next_to_use = 0;
1014
1015 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1016 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1017}
1018
1019/**
1020 * ixgb_set_mac - Change the Ethernet Address of the NIC
1021 * @netdev: network interface device structure
1022 * @p: pointer to an address structure
1023 *
1024 * Returns 0 on success, negative on failure
1025 **/
1026
1027static int
1028ixgb_set_mac(struct net_device *netdev, void *p)
1029{
8908c6cd 1030 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1031 struct sockaddr *addr = p;
1032
03f83041 1033 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1034 return -EADDRNOTAVAIL;
1035
1036 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1037
1038 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1039
1040 return 0;
1041}
1042
1043/**
1044 * ixgb_set_multi - Multicast and Promiscuous mode set
1045 * @netdev: network interface device structure
1046 *
1047 * The set_multi entry point is called whenever the multicast address
1048 * list or the network interface flags are updated. This routine is
1049 * responsible for configuring the hardware for proper multicast,
1050 * promiscuous mode, and all-multi behavior.
1051 **/
1052
1053static void
1054ixgb_set_multi(struct net_device *netdev)
1055{
8908c6cd 1056 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1057 struct ixgb_hw *hw = &adapter->hw;
1058 struct dev_mc_list *mc_ptr;
222441a6 1059 u32 rctl;
1da177e4
LT		 1060 int i;
1061
1062 /* Check for Promiscuous and All Multicast modes */
1063
1064 rctl = IXGB_READ_REG(hw, RCTL);
1065
03f83041 1066 if (netdev->flags & IFF_PROMISC) {
1da177e4 1067 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
03f83041 1068 } else if (netdev->flags & IFF_ALLMULTI) {
1da177e4
LT		 1069 rctl |= IXGB_RCTL_MPE;
1070 rctl &= ~IXGB_RCTL_UPE;
1071 } else {
1072 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1073 }
1074
03f83041 1075 if (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1076 rctl |= IXGB_RCTL_MPE;
1077 IXGB_WRITE_REG(hw, RCTL, rctl);
1078 } else {
222441a6 1079 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1080 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1081
1082 IXGB_WRITE_REG(hw, RCTL, rctl);
1083
0060c072
JB		 1084 for (i = 0, mc_ptr = netdev->mc_list;
1085 mc_ptr;
1086 i++, mc_ptr = mc_ptr->next)
1da177e4 1087 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
0060c072 1088 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1da177e4
LT		 1089
1090 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1091 }
1092}
1093
1094/**
1095 * ixgb_watchdog - Timer Call-back
1096 * @data: pointer to netdev cast into an unsigned long
1097 **/
1098
1099static void
1100ixgb_watchdog(unsigned long data)
1101{
1102 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1103 struct net_device *netdev = adapter->netdev;
1104 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1105
1106 ixgb_check_for_link(&adapter->hw);
1107
1108 if (ixgb_check_for_bad_link(&adapter->hw)) {
1109 /* force the reset path */
1110 netif_stop_queue(netdev);
1111 }
1112
03f83041
JB		 1113 if (adapter->hw.link_up) {
1114 if (!netif_carrier_ok(netdev)) {
ec9c3f5d
AK		 1115 DPRINTK(LINK, INFO,
1116 "NIC Link is Up 10000 Mbps Full Duplex\n");
1da177e4
LT		 1117 adapter->link_speed = 10000;
1118 adapter->link_duplex = FULL_DUPLEX;
1119 netif_carrier_on(netdev);
1120 netif_wake_queue(netdev);
1121 }
1122 } else {
03f83041 1123 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1124 adapter->link_speed = 0;
1125 adapter->link_duplex = 0;
ec9c3f5d 1126 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1da177e4
LT		 1127 netif_carrier_off(netdev);
1128 netif_stop_queue(netdev);
1129
1130 }
1131 }
1132
1133 ixgb_update_stats(adapter);
1134
03f83041
JB		 1135 if (!netif_carrier_ok(netdev)) {
1136 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1137 /* We've lost link, so the controller stops DMA,
1138 * but we've got queued Tx work that's never going
1139 * to get done, so reset controller to flush Tx.
1140 * (Do the reset outside of interrupt context). */
1141 schedule_work(&adapter->tx_timeout_task);
1142 }
1143 }
1144
1145 /* Force detection of hung controller every watchdog period */
446490ca 1146 adapter->detect_tx_hung = true;
1da177e4
LT		 1147
1148 /* generate an interrupt to force clean up of any stragglers */
1149 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1150
1151 /* Reset the timer */
1152 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1153}
1154
1155#define IXGB_TX_FLAGS_CSUM 0x00000001
1156#define IXGB_TX_FLAGS_VLAN 0x00000002
1157#define IXGB_TX_FLAGS_TSO 0x00000004
1158
235949d1 1159static int
1da177e4
LT		 1160ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1161{
1da177e4
LT		 1162 struct ixgb_context_desc *context_desc;
1163 unsigned int i;
222441a6
JP		 1164 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1165 u16 ipcse, tucse, mss;
1da177e4
LT		 1166 int err;
1167
89114afd 1168 if (likely(skb_is_gso(skb))) {
adc54139 1169 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1170 struct iphdr *iph;
1171
1da177e4
LT		 1172 if (skb_header_cloned(skb)) {
1173 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1174 if (err)
1175 return err;
1176 }
1177
ab6a5bb6 1178 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1179 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1180 iph = ip_hdr(skb);
1181 iph->tot_len = 0;
1182 iph->check = 0;
aa8223c7
ACM		 1183 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1184 iph->daddr, 0,
1185 IPPROTO_TCP, 0);
bbe735e4 1186 ipcss = skb_network_offset(skb);
eddc9ec5 1187 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1188 ipcse = skb_transport_offset(skb) - 1;
1189 tucss = skb_transport_offset(skb);
aa8223c7 1190 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1191 tucse = 0;
1192
1193 i = adapter->tx_ring.next_to_use;
1194 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1195 buffer_info = &adapter->tx_ring.buffer_info[i];
1196 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1197
1198 context_desc->ipcss = ipcss;
1199 context_desc->ipcso = ipcso;
1200 context_desc->ipcse = cpu_to_le16(ipcse);
1201 context_desc->tucss = tucss;
1202 context_desc->tucso = tucso;
1203 context_desc->tucse = cpu_to_le16(tucse);
1204 context_desc->mss = cpu_to_le16(mss);
1205 context_desc->hdr_len = hdr_len;
1206 context_desc->status = 0;
1207 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1208 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1209 | IXGB_CONTEXT_DESC_CMD_TSE
1210 | IXGB_CONTEXT_DESC_CMD_IP
1211 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1212 | IXGB_CONTEXT_DESC_CMD_IDE
1213 | (skb->len - (hdr_len)));
1214
06c2f9ec 1215
03f83041 1216 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1217 adapter->tx_ring.next_to_use = i;
1218
1219 return 1;
1220 }
1da177e4
LT		 1221
1222 return 0;
1223}
1224
446490ca 1225static bool
1da177e4
LT		 1226ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1227{
1228 struct ixgb_context_desc *context_desc;
1229 unsigned int i;
222441a6 1230 u8 css, cso;
1da177e4 1231
03f83041 1232 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1233 struct ixgb_buffer *buffer_info;
ea2ae17d 1234 css = skb_transport_offset(skb);
ff1dcadb 1235 cso = css + skb->csum_offset;
1da177e4
LT		 1236
1237 i = adapter->tx_ring.next_to_use;
1238 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1239 buffer_info = &adapter->tx_ring.buffer_info[i];
1240 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1241
1242 context_desc->tucss = css;
1243 context_desc->tucso = cso;
1244 context_desc->tucse = 0;
1245 /* zero out any previously existing data in one instruction */
222441a6 1246 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1247 context_desc->status = 0;
1248 context_desc->hdr_len = 0;
1249 context_desc->mss = 0;
1250 context_desc->cmd_type_len =
1251 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1252 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1253
03f83041 1254 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1255 adapter->tx_ring.next_to_use = i;
1256
446490ca 1257 return true;
1da177e4
LT		 1258 }
1259
446490ca 1260 return false;
1da177e4
LT		 1261}
1262
1263#define IXGB_MAX_TXD_PWR 14
1264#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1265
235949d1 1266static int
1da177e4
LT		 1267ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1268 unsigned int first)
1269{
1270 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1271 struct ixgb_buffer *buffer_info;
1272 int len = skb->len;
1273 unsigned int offset = 0, size, count = 0, i;
5d927853 1274 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1275
1276 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1277 unsigned int f;
ac79c82e 1278
1da177e4
LT		 1279 len -= skb->data_len;
1280
1281 i = tx_ring->next_to_use;
1282
9a432992 1283 while (len) {
1da177e4 1284 buffer_info = &tx_ring->buffer_info[i];
709cf018 1285 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1286 /* Workaround for premature desc write-backs
1287 * in TSO mode. Append 4-byte sentinel desc */
1288 if (unlikely(mss && !nr_frags && size == len && size > 8))
1289 size -= 4;
1290
1da177e4 1291 buffer_info->length = size;
adc54139 1292 WARN_ON(buffer_info->dma != 0);
34336635 1293 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1294 buffer_info->dma =
1295 pci_map_single(adapter->pdev,
1296 skb->data + offset,
1297 size,
1298 PCI_DMA_TODEVICE);
1dfdd7df 1299 buffer_info->next_to_watch = 0;
1da177e4
LT		 1300
1301 len -= size;
1302 offset += size;
1303 count++;
03f83041 1304 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1305 }
1306
1459336d 1307 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 1308 struct skb_frag_struct *frag;
1309
1310 frag = &skb_shinfo(skb)->frags[f];
1311 len = frag->size;
1312 offset = 0;
1313
9a432992 1314 while (len) {
1da177e4 1315 buffer_info = &tx_ring->buffer_info[i];
709cf018 1316 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1317
1318 /* Workaround for premature desc write-backs
1319 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1320 if (unlikely(mss && (f == (nr_frags - 1))
1321 && size == len && size > 8))
5d927853
JB		 1322 size -= 4;
1323
1da177e4 1324 buffer_info->length = size;
34336635 1325 buffer_info->time_stamp = jiffies;
1da177e4
LT		 1326 buffer_info->dma =
1327 pci_map_page(adapter->pdev,
1328 frag->page,
1329 frag->page_offset + offset,
1330 size,
1331 PCI_DMA_TODEVICE);
1dfdd7df 1332 buffer_info->next_to_watch = 0;
1da177e4
LT		 1333
1334 len -= size;
1335 offset += size;
1336 count++;
03f83041 1337 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1338 }
1339 }
1340 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1341 tx_ring->buffer_info[i].skb = skb;
1342 tx_ring->buffer_info[first].next_to_watch = i;
1343
1344 return count;
1345}
1346
235949d1 1347static void
1da177e4
LT		 1348ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1349{
1350 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1351 struct ixgb_tx_desc *tx_desc = NULL;
1352 struct ixgb_buffer *buffer_info;
222441a6
JP		 1353 u32 cmd_type_len = adapter->tx_cmd_type;
1354 u8 status = 0;
1355 u8 popts = 0;
1da177e4
LT		 1356 unsigned int i;
1357
03f83041 1358 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1359 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1360 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1361 }
1362
03f83041 1363 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1364 popts |= IXGB_TX_DESC_POPTS_TXSM;
1365
03f83041 1366 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1367 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1368
1369 i = tx_ring->next_to_use;
1370
9a432992 1371 while (count--) {
1da177e4
LT		 1372 buffer_info = &tx_ring->buffer_info[i];
1373 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1374 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1375 tx_desc->cmd_type_len =
1376 cpu_to_le32(cmd_type_len | buffer_info->length);
1377 tx_desc->status = status;
1378 tx_desc->popts = popts;
1379 tx_desc->vlan = cpu_to_le16(vlan_id);
1380
03f83041 1381 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1382 }
1383
0060c072
JB		 1384 tx_desc->cmd_type_len |=
1385 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1386
1387 /* Force memory writes to complete before letting h/w
1388 * know there are new descriptors to fetch. (Only
1389 * applicable for weak-ordered memory model archs,
1390 * such as IA-64). */
1391 wmb();
1392
1393 tx_ring->next_to_use = i;
1394 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1395}
1396
dfd341e4
JB		 1397static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1398{
1399 struct ixgb_adapter *adapter = netdev_priv(netdev);
1400 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1401
1402 netif_stop_queue(netdev);
1403 /* Herbert's original patch had:
1404 * smp_mb__after_netif_stop_queue();
1405 * but since that doesn't exist yet, just open code it. */
1406 smp_mb();
1407
1408 /* We need to check again in a case another CPU has just
1409 * made room available. */
1410 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1411 return -EBUSY;
1412
1413 /* A reprieve! */
1414 netif_start_queue(netdev);
1415 ++adapter->restart_queue;
1416 return 0;
1417}
1418
1419static int ixgb_maybe_stop_tx(struct net_device *netdev,
1420 struct ixgb_desc_ring *tx_ring, int size)
1421{
1422 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1423 return 0;
1424 return __ixgb_maybe_stop_tx(netdev, size);
1425}
1426
1427
1da177e4
LT		 1428/* Tx Descriptors needed, worst case */
1429#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1430 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1431#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1432 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1433 + 1 /* one more needed for sentinel TSO workaround */
1da177e4
LT		 1434
1435static int
1436ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1437{
8908c6cd 1438 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1439 unsigned int first;
1440 unsigned int tx_flags = 0;
1da177e4
LT		 1441 int vlan_id = 0;
1442 int tso;
1443
bab2bce7
JB		 1444 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1445 dev_kfree_skb(skb);
1446 return NETDEV_TX_OK;
1447 }
1448
03f83041 1449 if (skb->len <= 0) {
1da177e4
LT		 1450 dev_kfree_skb_any(skb);
1451 return 0;
1452 }
1453
dfd341e4 1454 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1455 DESC_NEEDED)))
f017f14b 1456 return NETDEV_TX_BUSY;
1da177e4 1457
03f83041 1458 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1da177e4
LT		 1459 tx_flags |= IXGB_TX_FLAGS_VLAN;
1460 vlan_id = vlan_tx_tag_get(skb);
1461 }
1462
1463 first = adapter->tx_ring.next_to_use;
0060c072 1464
1da177e4
LT		 1465 tso = ixgb_tso(adapter, skb);
1466 if (tso < 0) {
1467 dev_kfree_skb_any(skb);
1468 return NETDEV_TX_OK;
1469 }
1470
96f9c2e2 1471 if (likely(tso))
1da177e4 1472 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1473 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1474 tx_flags |= IXGB_TX_FLAGS_CSUM;
1475
1476 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1477 tx_flags);
1478
1479 netdev->trans_start = jiffies;
1480
f017f14b 1481 /* Make sure there is space in the ring for the next send. */
dfd341e4 1482 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
f017f14b 1483
f017f14b 1484 return NETDEV_TX_OK;
1da177e4
LT		 1485}
1486
1487/**
1488 * ixgb_tx_timeout - Respond to a Tx Hang
1489 * @netdev: network interface device structure
1490 **/
1491
1492static void
1493ixgb_tx_timeout(struct net_device *netdev)
1494{
8908c6cd 1495 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1496
1497 /* Do the reset outside of interrupt context */
1498 schedule_work(&adapter->tx_timeout_task);
1499}
1500
1501static void
c4028958 1502ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1503{
c4028958
DH		 1504 struct ixgb_adapter *adapter =
1505 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1506
9b8118df 1507 adapter->tx_timeout_count++;
446490ca 1508 ixgb_down(adapter, true);
1da177e4
LT		 1509 ixgb_up(adapter);
1510}
1511
1512/**
1513 * ixgb_get_stats - Get System Network Statistics
1514 * @netdev: network interface device structure
1515 *
1516 * Returns the address of the device statistics structure.
1517 * The statistics are actually updated from the timer callback.
1518 **/
1519
1520static struct net_device_stats *
1521ixgb_get_stats(struct net_device *netdev)
1522{
8908c6cd 1523 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1524
1525 return &adapter->net_stats;
1526}
1527
1528/**
1529 * ixgb_change_mtu - Change the Maximum Transfer Unit
1530 * @netdev: network interface device structure
1531 * @new_mtu: new value for maximum frame size
1532 *
1533 * Returns 0 on success, negative on failure
1534 **/
1535
1536static int
1537ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1538{
8908c6cd 1539 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1540 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1541 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1542
a65a604a
JB		 1543 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1544 if ((new_mtu < 68) ||
1545 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
ec9c3f5d 1546 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1547 return -EINVAL;
1548 }
1549
b5ca88eb
JB		 1550 if (old_max_frame == max_frame)
1551 return 0;
1552
1553 if (netif_running(netdev))
1554 ixgb_down(adapter, true);
1555
a3dc3da0 1556 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1557
1558 netdev->mtu = new_mtu;
1559
b5ca88eb 1560 if (netif_running(netdev))
1da177e4 1561 ixgb_up(adapter);
1da177e4
LT		 1562
1563 return 0;
1564}
1565
1566/**
1567 * ixgb_update_stats - Update the board statistics counters.
1568 * @adapter: board private structure
1569 **/
1570
1571void
1572ixgb_update_stats(struct ixgb_adapter *adapter)
1573{
5633684d 1574 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1575 struct pci_dev *pdev = adapter->pdev;
1576
1577 /* Prevent stats update while adapter is being reset */
81b1955e 1578 if (pci_channel_offline(pdev))
01748fbb 1579 return;
5633684d 1580
03f83041 1581 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
5633684d
MC		 1582 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1583 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1584 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1585 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1586 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1587
1588 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1589 /* fix up multicast stats by removing broadcasts */
03f83041 1590 if (multi >= bcast)
7b89178d 1591 multi -= bcast;
0060c072 1592
5633684d
MC		 1593 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1594 adapter->stats.mprch += (multi >> 32);
0060c072 1595 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1596 adapter->stats.bprch += bcast_h;
1597 } else {
1598 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1599 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1600 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1601 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1602 }
1da177e4
LT		 1603 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1604 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1605 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1606 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1607 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1608 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1609 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1610 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1611 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1612 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1613 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1614 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1615 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1616 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1617 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1618 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1619 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1620 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1621 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1622 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1623 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1624 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1625 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1626 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1627 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1628 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1629 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1630 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1631 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1632 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1633 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1634 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1635 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1636 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1637 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1638 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1639 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1640 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1641 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1642 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1643 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1644 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1645 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1646 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1647 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1648 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1649 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1650 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1651 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1652 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1653 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1654 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1655 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1656 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1657 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1658 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1659
1660 /* Fill out the OS statistics structure */
1661
1662 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1663 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1664 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1665 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1666 adapter->net_stats.multicast = adapter->stats.mprcl;
1667 adapter->net_stats.collisions = 0;
1668
1669 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1670 * with a length in the type/len field */
1671 adapter->net_stats.rx_errors =
1672 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1673 adapter->stats.ruc +
1674 adapter->stats.roc /*+ adapter->stats.rlec */ +
1675 adapter->stats.icbc +
1676 adapter->stats.ecbc + adapter->stats.mpc;
1677
1da177e4
LT		 1678 /* see above
1679 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1680 */
1681
1682 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1683 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1684 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1685 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1686
1687 adapter->net_stats.tx_errors = 0;
1688 adapter->net_stats.rx_frame_errors = 0;
1689 adapter->net_stats.tx_aborted_errors = 0;
1690 adapter->net_stats.tx_carrier_errors = 0;
1691 adapter->net_stats.tx_fifo_errors = 0;
1692 adapter->net_stats.tx_heartbeat_errors = 0;
1693 adapter->net_stats.tx_window_errors = 0;
1694}
1695
1696#define IXGB_MAX_INTR 10
1697/**
1698 * ixgb_intr - Interrupt Handler
1699 * @irq: interrupt number
1700 * @data: pointer to a network interface device structure
1da177e4
LT		 1701 **/
1702
1703static irqreturn_t
7d12e780 1704ixgb_intr(int irq, void *data)
1da177e4
LT		 1705{
1706 struct net_device *netdev = data;
8908c6cd 1707 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1708 struct ixgb_hw *hw = &adapter->hw;
222441a6 1709 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4
LT		 1710#ifndef CONFIG_IXGB_NAPI
1711 unsigned int i;
1712#endif
1713
03f83041 1714 if (unlikely(!icr))
1da177e4
LT		 1715 return IRQ_NONE; /* Not our interrupt */
1716
bab2bce7
JB		 1717 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1718 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1719 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4
LT		 1720
1721#ifdef CONFIG_IXGB_NAPI
bea3348e 1722 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1da177e4 1723
0060c072 1724 /* Disable interrupts and register for poll. The flush
1da177e4
LT		 1725 of the posted write is intentionally left out.
1726 */
1727
1da177e4 1728 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
bea3348e 1729 __netif_rx_schedule(netdev, &adapter->napi);
1da177e4
LT		 1730 }
1731#else
1732 /* yes, that is actually a & and it is meant to make sure that
1733 * every pass through this for loop checks both receive and
1734 * transmit queues for completed descriptors, intended to
1735 * avoid starvation issues and assist tx/rx fairness. */
1459336d 1736 for (i = 0; i < IXGB_MAX_INTR; i++)
03f83041 1737 if (!ixgb_clean_rx_irq(adapter) &
1da177e4
LT		 1738 !ixgb_clean_tx_irq(adapter))
1739 break;
0060c072 1740#endif
1da177e4
LT		 1741 return IRQ_HANDLED;
1742}
1743
1744#ifdef CONFIG_IXGB_NAPI
1745/**
1746 * ixgb_clean - NAPI Rx polling callback
1747 * @adapter: board private structure
1748 **/
1749
1750static int
bea3348e 1751ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1752{
bea3348e
SH		 1753 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1754 struct net_device *netdev = adapter->netdev;
1da177e4
LT		 1755 int work_done = 0;
1756
53e52c72 1757 ixgb_clean_tx_irq(adapter);
bea3348e 1758 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1759
53e52c72
DM		 1760 /* If budget not fully consumed, exit the polling mode */
1761 if (work_done < budget) {
bea3348e 1762 netif_rx_complete(netdev, napi);
72ab5195
JB		 1763 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1764 ixgb_irq_enable(adapter);
1da177e4
LT		 1765 }
1766
bea3348e 1767 return work_done;
1da177e4
LT		 1768}
1769#endif
1770
1771/**
1772 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1773 * @adapter: board private structure
1774 **/
1775
446490ca 1776static bool
1da177e4
LT		 1777ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1778{
1779 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1780 struct net_device *netdev = adapter->netdev;
1781 struct ixgb_tx_desc *tx_desc, *eop_desc;
1782 struct ixgb_buffer *buffer_info;
1783 unsigned int i, eop;
446490ca 1784 bool cleaned = false;
1da177e4
LT		 1785
1786 i = tx_ring->next_to_clean;
1787 eop = tx_ring->buffer_info[i].next_to_watch;
1788 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1789
9a432992 1790 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1791
446490ca 1792 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1793 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1794 buffer_info = &tx_ring->buffer_info[i];
1795
0060c072
JB		 1796 if (tx_desc->popts &
1797 (IXGB_TX_DESC_POPTS_TXSM |
1798 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1799 adapter->hw_csum_tx_good++;
1800
1801 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1802
222441a6 1803 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1804
1805 cleaned = (i == eop);
03f83041 1806 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1807 }
1808
1809 eop = tx_ring->buffer_info[i].next_to_watch;
1810 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1811 }
1812
1813 tx_ring->next_to_clean = i;
1814
0f8ecbad
JB		 1815 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1816 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1817 /* Make sure that anybody stopping the queue after this
1818 * sees the new next_to_clean. */
1819 smp_mb();
1820
1821 if (netif_queue_stopped(netdev) &&
1822 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1823 netif_wake_queue(netdev);
0f8ecbad
JB		 1824 ++adapter->restart_queue;
1825 }
1da177e4 1826 }
1da177e4 1827
03f83041 1828 if (adapter->detect_tx_hung) {
1da177e4
LT		 1829 /* detect a transmit hang in hardware, this serializes the
1830 * check with the clearing of time_stamp and movement of i */
446490ca 1831 adapter->detect_tx_hung = false;
9b8118df
AK		 1832 if (tx_ring->buffer_info[eop].dma &&
1833 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1834 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1835 IXGB_STATUS_TXOFF)) {
1836 /* detected Tx unit hang */
1837 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1838 " TDH <%x>\n"
1839 " TDT <%x>\n"
1840 " next_to_use <%x>\n"
1841 " next_to_clean <%x>\n"
1842 "buffer_info[next_to_clean]\n"
1843 " time_stamp <%lx>\n"
1844 " next_to_watch <%x>\n"
1845 " jiffies <%lx>\n"
1846 " next_to_watch.status <%x>\n",
1847 IXGB_READ_REG(&adapter->hw, TDH),
1848 IXGB_READ_REG(&adapter->hw, TDT),
1849 tx_ring->next_to_use,
1850 tx_ring->next_to_clean,
1851 tx_ring->buffer_info[eop].time_stamp,
1852 eop,
1853 jiffies,
1854 eop_desc->status);
1da177e4 1855 netif_stop_queue(netdev);
9b8118df 1856 }
1da177e4
LT		 1857 }
1858
1859 return cleaned;
1860}
1861
1862/**
1863 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1864 * @adapter: board private structure
1865 * @rx_desc: receive descriptor
1866 * @sk_buff: socket buffer with received data
1867 **/
1868
235949d1 1869static void
1da177e4 1870ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1871 struct ixgb_rx_desc *rx_desc,
1872 struct sk_buff *skb)
1da177e4
LT		 1873{
1874 /* Ignore Checksum bit is set OR
1875 * TCP Checksum has not been calculated
1876 */
03f83041 1877 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4
LT		 1878 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1879 skb->ip_summed = CHECKSUM_NONE;
1880 return;
1881 }
1882
1883 /* At this point we know the hardware did the TCP checksum */
1884 /* now look at the TCP checksum error bit */
03f83041 1885 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4
LT		 1886 /* let the stack verify checksum errors */
1887 skb->ip_summed = CHECKSUM_NONE;
1888 adapter->hw_csum_rx_error++;
1889 } else {
1890 /* TCP checksum is good */
1891 skb->ip_summed = CHECKSUM_UNNECESSARY;
1892 adapter->hw_csum_rx_good++;
1893 }
1894}
1895
1896/**
1897 * ixgb_clean_rx_irq - Send received data up the network stack,
1898 * @adapter: board private structure
1899 **/
1900
446490ca 1901static bool
1da177e4
LT		 1902#ifdef CONFIG_IXGB_NAPI
1903ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1904#else
1905ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1906#endif
1907{
1908 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1909 struct net_device *netdev = adapter->netdev;
1910 struct pci_dev *pdev = adapter->pdev;
1911 struct ixgb_rx_desc *rx_desc, *next_rxd;
1912 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1913 u32 length;
1da177e4 1914 unsigned int i, j;
fc2d14e3 1915 int cleaned_count = 0;
446490ca 1916 bool cleaned = false;
1da177e4
LT		 1917
1918 i = rx_ring->next_to_clean;
1919 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1920 buffer_info = &rx_ring->buffer_info[i];
1921
9a432992 1922 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
fc2d14e3 1923 struct sk_buff *skb;
f404de1c 1924 u8 status;
1da177e4
LT		 1925
1926#ifdef CONFIG_IXGB_NAPI
03f83041 1927 if (*work_done >= work_to_do)
1da177e4
LT		 1928 break;
1929
1930 (*work_done)++;
1931#endif
f404de1c 1932 status = rx_desc->status;
1da177e4 1933 skb = buffer_info->skb;
1dfdd7df 1934 buffer_info->skb = NULL;
f404de1c 1935
fc2d14e3 1936 prefetch(skb->data - NET_IP_ALIGN);
1da177e4 1937
03f83041 1938 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 1939 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1940 prefetch(next_rxd);
1941
03f83041 1942 if ((j = i + 1) == rx_ring->count) j = 0;
1da177e4
LT		 1943 next2_buffer = &rx_ring->buffer_info[j];
1944 prefetch(next2_buffer);
1945
1946 next_buffer = &rx_ring->buffer_info[i];
1da177e4 1947
446490ca 1948 cleaned = true;
fc2d14e3 1949 cleaned_count++;
1da177e4
LT		 1950
1951 pci_unmap_single(pdev,
1952 buffer_info->dma,
1953 buffer_info->length,
1954 PCI_DMA_FROMDEVICE);
fc2d14e3 1955 buffer_info->dma = 0;
1da177e4
LT		 1956
1957 length = le16_to_cpu(rx_desc->length);
fc2d14e3 1958 rx_desc->length = 0;
1da177e4 1959
03f83041 1960 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 1961
1962 /* All receives must fit into a single buffer */
1963
1964 IXGB_DBG("Receive packet consumed multiple buffers "
1965 "length<%x>\n", length);
1966
1967 dev_kfree_skb_irq(skb);
f404de1c 1968 goto rxdesc_done;
1da177e4
LT		 1969 }
1970
0060c072
JB		 1971 if (unlikely(rx_desc->errors &
1972 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
1973 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 1974 dev_kfree_skb_irq(skb);
f404de1c 1975 goto rxdesc_done;
1da177e4
LT		 1976 }
1977
6b900bb4
AK		 1978 /* code added for copybreak, this should improve
1979 * performance for small packets with large amounts
1980 * of reassembly being done in the stack */
d9fed18b 1981 if (length < copybreak) {
6b900bb4 1982 struct sk_buff *new_skb =
5791704f 1983 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
6b900bb4
AK		 1984 if (new_skb) {
1985 skb_reserve(new_skb, NET_IP_ALIGN);
27d7ff46
ACM		 1986 skb_copy_to_linear_data_offset(new_skb,
1987 -NET_IP_ALIGN,
1988 (skb->data -
1989 NET_IP_ALIGN),
1990 (length +
1991 NET_IP_ALIGN));
6b900bb4
AK		 1992 /* save the skb in buffer_info as good */
1993 buffer_info->skb = skb;
1994 skb = new_skb;
1995 }
1996 }
1997 /* end copybreak code */
1998
1da177e4
LT		 1999 /* Good Receive */
2000 skb_put(skb, length);
2001
2002 /* Receive Checksum Offload */
2003 ixgb_rx_checksum(adapter, rx_desc, skb);
2004
2005 skb->protocol = eth_type_trans(skb, netdev);
2006#ifdef CONFIG_IXGB_NAPI
03f83041 2007 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2008 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
0060c072 2009 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2010 } else {
2011 netif_receive_skb(skb);
2012 }
2013#else /* CONFIG_IXGB_NAPI */
03f83041 2014 if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2015 vlan_hwaccel_rx(skb, adapter->vlgrp,
0060c072 2016 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2017 } else {
2018 netif_rx(skb);
2019 }
2020#endif /* CONFIG_IXGB_NAPI */
2021 netdev->last_rx = jiffies;
2022
f404de1c
MC		 2023rxdesc_done:
2024 /* clean up descriptor, might be written over by hw */
1da177e4 2025 rx_desc->status = 0;
1da177e4 2026
fc2d14e3
JB		 2027 /* return some buffers to hardware, one at a time is too slow */
2028 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
2029 ixgb_alloc_rx_buffers(adapter, cleaned_count);
2030 cleaned_count = 0;
2031 }
2032
f404de1c 2033 /* use prefetched values */
1da177e4
LT		 2034 rx_desc = next_rxd;
2035 buffer_info = next_buffer;
2036 }
2037
2038 rx_ring->next_to_clean = i;
2039
fc2d14e3
JB		 2040 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2041 if (cleaned_count)
2042 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1da177e4
LT		 2043
2044 return cleaned;
2045}
2046
2047/**
2048 * ixgb_alloc_rx_buffers - Replace used receive buffers
2049 * @adapter: address of board private structure
2050 **/
2051
2052static void
fc2d14e3 2053ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
1da177e4
LT		 2054{
2055 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2056 struct net_device *netdev = adapter->netdev;
2057 struct pci_dev *pdev = adapter->pdev;
2058 struct ixgb_rx_desc *rx_desc;
2059 struct ixgb_buffer *buffer_info;
2060 struct sk_buff *skb;
2061 unsigned int i;
1da177e4
LT		 2062 long cleancount;
2063
2064 i = rx_ring->next_to_use;
2065 buffer_info = &rx_ring->buffer_info[i];
2066 cleancount = IXGB_DESC_UNUSED(rx_ring);
2067
1da177e4 2068
41639fed 2069 /* leave three descriptors unused */
fc2d14e3 2070 while (--cleancount > 2 && cleaned_count--) {
1dfdd7df 2071 /* recycle! its good for you */
69c7a940
AK		 2072 skb = buffer_info->skb;
2073 if (skb) {
1dfdd7df
AK		 2074 skb_trim(skb, 0);
2075 goto map_skb;
2076 }
1da177e4 2077
69c7a940
AK		 2078 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2079 + NET_IP_ALIGN);
1dfdd7df 2080 if (unlikely(!skb)) {
1da177e4 2081 /* Better luck next round */
1dfdd7df 2082 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2083 break;
2084 }
2085
2086 /* Make buffer alignment 2 beyond a 16 byte boundary
2087 * this will result in a 16 byte aligned IP header after
2088 * the 14 byte MAC header is removed
2089 */
2090 skb_reserve(skb, NET_IP_ALIGN);
2091
1da177e4
LT		 2092 buffer_info->skb = skb;
2093 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df
AK		 2094map_skb:
2095 buffer_info->dma = pci_map_single(pdev,
2096 skb->data,
2097 adapter->rx_buffer_len,
2098 PCI_DMA_FROMDEVICE);
1da177e4 2099
1dfdd7df 2100 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2101 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2102 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2103 * this is the rest of the workaround for h/w double
41639fed
MC		 2104 * writeback. */
2105 rx_desc->status = 0;
1da177e4 2106
1da177e4 2107
03f83041 2108 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2109 buffer_info = &rx_ring->buffer_info[i];
2110 }
2111
1dfdd7df
AK		 2112 if (likely(rx_ring->next_to_use != i)) {
2113 rx_ring->next_to_use = i;
2114 if (unlikely(i-- == 0))
2115 i = (rx_ring->count - 1);
2116
2117 /* Force memory writes to complete before letting h/w
2118 * know there are new descriptors to fetch. (Only
2119 * applicable for weak-ordered memory model archs, such
2120 * as IA-64). */
2121 wmb();
2122 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2123 }
1da177e4
LT		 2124}
2125
2126/**
2127 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
0060c072 2128 *
1da177e4
LT		 2129 * @param netdev network interface device structure
2130 * @param grp indicates to enable or disable tagging/stripping
2131 **/
2132static void
2133ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2134{
8908c6cd 2135 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2136 u32 ctrl, rctl;
1da177e4
LT		 2137
2138 ixgb_irq_disable(adapter);
2139 adapter->vlgrp = grp;
2140
03f83041 2141 if (grp) {
1da177e4
LT		 2142 /* enable VLAN tag insert/strip */
2143 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2144 ctrl |= IXGB_CTRL0_VME;
2145 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2146
2147 /* enable VLAN receive filtering */
2148
2149 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2150 rctl |= IXGB_RCTL_VFE;
2151 rctl &= ~IXGB_RCTL_CFIEN;
2152 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2153 } else {
2154 /* disable VLAN tag insert/strip */
2155
2156 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2157 ctrl &= ~IXGB_CTRL0_VME;
2158 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2159
2160 /* disable VLAN filtering */
2161
2162 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2163 rctl &= ~IXGB_RCTL_VFE;
2164 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2165 }
2166
bab2bce7
JB		 2167 /* don't enable interrupts unless we are UP */
2168 if (adapter->netdev->flags & IFF_UP)
2169 ixgb_irq_enable(adapter);
1da177e4
LT		 2170}
2171
2172static void
222441a6 2173ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2174{
8908c6cd 2175 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2176 u32 vfta, index;
1da177e4
LT		 2177
2178 /* add VID to filter table */
2179
2180 index = (vid >> 5) & 0x7F;
2181 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2182 vfta |= (1 << (vid & 0x1F));
2183 ixgb_write_vfta(&adapter->hw, index, vfta);
2184}
2185
2186static void
222441a6 2187ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2188{
8908c6cd 2189 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2190 u32 vfta, index;
1da177e4
LT		 2191
2192 ixgb_irq_disable(adapter);
2193
5c15bdec 2194 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 2195
bab2bce7
JB		 2196 /* don't enable interrupts unless we are UP */
2197 if (adapter->netdev->flags & IFF_UP)
2198 ixgb_irq_enable(adapter);
1da177e4 2199
bab2bce7 2200 /* remove VID from filter table */
1da177e4
LT		 2201
2202 index = (vid >> 5) & 0x7F;
2203 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2204 vfta &= ~(1 << (vid & 0x1F));
2205 ixgb_write_vfta(&adapter->hw, index, vfta);
2206}
2207
2208static void
2209ixgb_restore_vlan(struct ixgb_adapter *adapter)
2210{
2211 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2212
03f83041 2213 if (adapter->vlgrp) {
222441a6 2214 u16 vid;
1459336d 2215 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
03f83041 2216 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2217 continue;
2218 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2219 }
2220 }
2221}
2222
1da177e4
LT		 2223#ifdef CONFIG_NET_POLL_CONTROLLER
2224/*
2225 * Polling 'interrupt' - used by things like netconsole to send skbs
2226 * without having to re-enable interrupts. It's not called while
2227 * the interrupt routine is executing.
2228 */
2229
2230static void ixgb_netpoll(struct net_device *dev)
2231{
f990b426 2232 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2233
1da177e4 2234 disable_irq(adapter->pdev->irq);
7d12e780 2235 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2236 enable_irq(adapter->pdev->irq);
2237}
2238#endif
2239
01748fbb
LV		 2240/**
2241 * ixgb_io_error_detected() - called when PCI error is detected
2242 * @pdev pointer to pci device with error
2243 * @state pci channel state after error
2244 *
2245 * This callback is called by the PCI subsystem whenever
2246 * a PCI bus error is detected.
2247 */
0060c072
JB		 2248static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2249 enum pci_channel_state state)
01748fbb
LV		 2250{
2251 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2252 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2253
03f83041 2254 if (netif_running(netdev))
446490ca 2255 ixgb_down(adapter, true);
01748fbb
LV		 2256
2257 pci_disable_device(pdev);
2258
2259 /* Request a slot reset. */
2260 return PCI_ERS_RESULT_NEED_RESET;
2261}
2262
2263/**
2264 * ixgb_io_slot_reset - called after the pci bus has been reset.
2265 * @pdev pointer to pci device with error
2266 *
52035bdb 2267 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2268 * Basically, this tries to restart the card from scratch.
2269 * This is a shortened version of the device probe/discovery code,
2270 * it resembles the first-half of the ixgb_probe() routine.
2271 */
0060c072 2272static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2273{
2274 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2275 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2276
03f83041 2277 if (pci_enable_device(pdev)) {
01748fbb
LV		 2278 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2279 return PCI_ERS_RESULT_DISCONNECT;
2280 }
2281
2282 /* Perform card reset only on one instance of the card */
2283 if (0 != PCI_FUNC (pdev->devfn))
2284 return PCI_ERS_RESULT_RECOVERED;
2285
2286 pci_set_master(pdev);
2287
2288 netif_carrier_off(netdev);
2289 netif_stop_queue(netdev);
2290 ixgb_reset(adapter);
2291
2292 /* Make sure the EEPROM is good */
03f83041 2293 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
01748fbb
LV		 2294 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2295 return PCI_ERS_RESULT_DISCONNECT;
2296 }
2297 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2298 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2299
03f83041 2300 if (!is_valid_ether_addr(netdev->perm_addr)) {
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LV		 2301 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2302 return PCI_ERS_RESULT_DISCONNECT;
2303 }
2304
2305 return PCI_ERS_RESULT_RECOVERED;
2306}
2307
2308/**
2309 * ixgb_io_resume - called when its OK to resume normal operations
2310 * @pdev pointer to pci device with error
2311 *
2312 * The error recovery driver tells us that its OK to resume
2313 * normal operation. Implementation resembles the second-half
2314 * of the ixgb_probe() routine.
2315 */
0060c072 2316static void ixgb_io_resume(struct pci_dev *pdev)
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LV		 2317{
2318 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2319 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2320
2321 pci_set_master(pdev);
2322
03f83041
JB		 2323 if (netif_running(netdev)) {
2324 if (ixgb_up(adapter)) {
01748fbb
LV		 2325 printk ("ixgb: can't bring device back up after reset\n");
2326 return;
2327 }
2328 }
2329
2330 netif_device_attach(netdev);
2331 mod_timer(&adapter->watchdog_timer, jiffies);
2332}
2333
1da177e4 2334/* ixgb_main.c */
kernel source for telekom puls (alcatel/mediatek)