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ixgb: maybe stop tx port missed a piece
[deliverable/linux.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
LT		 42
43/* ixgb_pci_tbl - PCI Device ID Table
44 *
45 * Wildcard entries (PCI_ANY_ID) should come last
46 * Last entry must be all 0s
47 *
48 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
49 * Class, Class Mask, private data (not used) }
50 */
51static struct pci_device_id ixgb_pci_tbl[] = {
52 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
53 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
940829e2
AK		 54 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
55 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1da177e4
LT		 56 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
57 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
58 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
59 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
60
61 /* required last entry */
62 {0,}
63};
64
65MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
66
67/* Local Function Prototypes */
68
69int ixgb_up(struct ixgb_adapter *adapter);
446490ca 70void ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog);
1da177e4
LT		 71void ixgb_reset(struct ixgb_adapter *adapter);
72int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
73int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
74void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
75void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
76void ixgb_update_stats(struct ixgb_adapter *adapter);
77
78static int ixgb_init_module(void);
79static void ixgb_exit_module(void);
80static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
81static void __devexit ixgb_remove(struct pci_dev *pdev);
82static int ixgb_sw_init(struct ixgb_adapter *adapter);
83static int ixgb_open(struct net_device *netdev);
84static int ixgb_close(struct net_device *netdev);
85static void ixgb_configure_tx(struct ixgb_adapter *adapter);
86static void ixgb_configure_rx(struct ixgb_adapter *adapter);
87static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
88static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
89static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
90static void ixgb_set_multi(struct net_device *netdev);
91static void ixgb_watchdog(unsigned long data);
92static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
93static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
94static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
95static int ixgb_set_mac(struct net_device *netdev, void *p);
7d12e780 96static irqreturn_t ixgb_intr(int irq, void *data);
446490ca 97static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
ac79c82e 98
1da177e4 99#ifdef CONFIG_IXGB_NAPI
bea3348e 100static int ixgb_clean(struct napi_struct *napi, int budget);
446490ca
JP		 101static bool ixgb_clean_rx_irq(struct ixgb_adapter *adapter,
102 int *work_done, int work_to_do);
1da177e4 103#else
446490ca 104static bool ixgb_clean_rx_irq(struct ixgb_adapter *adapter);
1da177e4
LT		 105#endif
106static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter);
1da177e4 107static void ixgb_tx_timeout(struct net_device *dev);
c4028958 108static void ixgb_tx_timeout_task(struct work_struct *work);
1da177e4
LT		 109static void ixgb_vlan_rx_register(struct net_device *netdev,
110 struct vlan_group *grp);
222441a6
JP		 111static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
112static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
1da177e4
LT		 113static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
114
1da177e4
LT		 115#ifdef CONFIG_NET_POLL_CONTROLLER
116/* for netdump / net console */
117static void ixgb_netpoll(struct net_device *dev);
118#endif
119
01748fbb
LV		 120static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
121 enum pci_channel_state state);
122static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
123static void ixgb_io_resume (struct pci_dev *pdev);
1da177e4 124
01748fbb
LV		 125static struct pci_error_handlers ixgb_err_handler = {
126 .error_detected = ixgb_io_error_detected,
127 .slot_reset = ixgb_io_slot_reset,
128 .resume = ixgb_io_resume,
129};
130
1da177e4 131static struct pci_driver ixgb_driver = {
c2eba932 132 .name = ixgb_driver_name,
1da177e4 133 .id_table = ixgb_pci_tbl,
c2eba932
MC		 134 .probe = ixgb_probe,
135 .remove = __devexit_p(ixgb_remove),
01748fbb 136 .err_handler = &ixgb_err_handler
1da177e4
LT		 137};
138
139MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
140MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
141MODULE_LICENSE("GPL");
01e5abc2 142MODULE_VERSION(DRV_VERSION);
1da177e4 143
ec9c3f5d
AK		 144#define DEFAULT_DEBUG_LEVEL_SHIFT 3
145static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
146module_param(debug, int, 0);
147MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
148
1da177e4 149/* some defines for controlling descriptor fetches in h/w */
3ae84d92
JB		 150#define RXDCTL_WTHRESH_DEFAULT 15 /* chip writes back at this many or RXT0 */
151#define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
152 * this */
153#define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
154 * is pushed this many descriptors
155 * from head */
1da177e4
LT		 156
157/**
158 * ixgb_init_module - Driver Registration Routine
159 *
160 * ixgb_init_module is the first routine called when the driver is
161 * loaded. All it does is register with the PCI subsystem.
162 **/
163
164static int __init
165ixgb_init_module(void)
166{
1da177e4
LT		 167 printk(KERN_INFO "%s - version %s\n",
168 ixgb_driver_string, ixgb_driver_version);
169
170 printk(KERN_INFO "%s\n", ixgb_copyright);
171
29917620 172 return pci_register_driver(&ixgb_driver);
1da177e4
LT		 173}
174
175module_init(ixgb_init_module);
176
177/**
178 * ixgb_exit_module - Driver Exit Cleanup Routine
179 *
180 * ixgb_exit_module is called just before the driver is removed
181 * from memory.
182 **/
183
184static void __exit
185ixgb_exit_module(void)
186{
1da177e4
LT		 187 pci_unregister_driver(&ixgb_driver);
188}
189
190module_exit(ixgb_exit_module);
191
192/**
193 * ixgb_irq_disable - Mask off interrupt generation on the NIC
194 * @adapter: board private structure
195 **/
196
235949d1 197static void
1da177e4
LT		 198ixgb_irq_disable(struct ixgb_adapter *adapter)
199{
1da177e4
LT		 200 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
201 IXGB_WRITE_FLUSH(&adapter->hw);
202 synchronize_irq(adapter->pdev->irq);
203}
204
205/**
206 * ixgb_irq_enable - Enable default interrupt generation settings
207 * @adapter: board private structure
208 **/
209
235949d1 210static void
1da177e4
LT		 211ixgb_irq_enable(struct ixgb_adapter *adapter)
212{
9c61a9dc
JB		 213 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
214 IXGB_INT_TXDW | IXGB_INT_LSC;
215 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
216 val |= IXGB_INT_GPI0;
217 IXGB_WRITE_REG(&adapter->hw, IMS, val);
218 IXGB_WRITE_FLUSH(&adapter->hw);
1da177e4
LT		 219}
220
221int
222ixgb_up(struct ixgb_adapter *adapter)
223{
224 struct net_device *netdev = adapter->netdev;
fb136c07 225 int err, irq_flags = IRQF_SHARED;
1da177e4
LT		 226 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
227 struct ixgb_hw *hw = &adapter->hw;
228
229 /* hardware has been reset, we need to reload some things */
230
8556f0d1 231 ixgb_rar_set(hw, netdev->dev_addr, 0);
1da177e4
LT		 232 ixgb_set_multi(netdev);
233
234 ixgb_restore_vlan(adapter);
235
236 ixgb_configure_tx(adapter);
237 ixgb_setup_rctl(adapter);
238 ixgb_configure_rx(adapter);
239 ixgb_alloc_rx_buffers(adapter);
240
e59d1696
AK		 241 /* disable interrupts and get the hardware into a known state */
242 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
243
fb136c07
AK		 244 /* only enable MSI if bus is in PCI-X mode */
245 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
246 err = pci_enable_msi(adapter->pdev);
247 if (!err) {
248 adapter->have_msi = 1;
249 irq_flags = 0;
250 }
1da177e4
LT		 251 /* proceed to try to request regular interrupt */
252 }
1da177e4 253
fb136c07
AK		 254 err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
255 netdev->name, netdev);
256 if (err) {
257 if (adapter->have_msi)
258 pci_disable_msi(adapter->pdev);
ec9c3f5d
AK		 259 DPRINTK(PROBE, ERR,
260 "Unable to allocate interrupt Error: %d\n", err);
1da177e4 261 return err;
ec9c3f5d 262 }
1da177e4 263
1da177e4
LT		 264 if((hw->max_frame_size != max_frame) ||
265 (hw->max_frame_size !=
266 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
267
268 hw->max_frame_size = max_frame;
269
270 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
271
272 if(hw->max_frame_size >
273 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
222441a6 274 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
1da177e4
LT		 275
276 if(!(ctrl0 & IXGB_CTRL0_JFE)) {
277 ctrl0 |= IXGB_CTRL0_JFE;
278 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
279 }
280 }
281 }
282
bab2bce7 283 clear_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 284
285#ifdef CONFIG_IXGB_NAPI
bea3348e 286 napi_enable(&adapter->napi);
1da177e4 287#endif
e59d1696
AK		 288 ixgb_irq_enable(adapter);
289
bab2bce7
JB		 290 mod_timer(&adapter->watchdog_timer, jiffies);
291
1da177e4
LT		 292 return 0;
293}
294
295void
446490ca 296ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
1da177e4
LT		 297{
298 struct net_device *netdev = adapter->netdev;
299
bab2bce7
JB		 300 /* prevent the interrupt handler from restarting watchdog */
301 set_bit(__IXGB_DOWN, &adapter->flags);
302
49d85c50
DM		 303#ifdef CONFIG_IXGB_NAPI
304 napi_disable(&adapter->napi);
49d85c50 305#endif
bab2bce7 306 /* waiting for NAPI to complete can re-enable interrupts */
1da177e4
LT		 307 ixgb_irq_disable(adapter);
308 free_irq(adapter->pdev->irq, netdev);
fb136c07
AK		 309
310 if (adapter->have_msi)
1da177e4
LT		 311 pci_disable_msi(adapter->pdev);
312
1da177e4
LT		 313 if(kill_watchdog)
314 del_timer_sync(&adapter->watchdog_timer);
49d85c50 315
1da177e4
LT		 316 adapter->link_speed = 0;
317 adapter->link_duplex = 0;
318 netif_carrier_off(netdev);
319 netif_stop_queue(netdev);
320
321 ixgb_reset(adapter);
322 ixgb_clean_tx_ring(adapter);
323 ixgb_clean_rx_ring(adapter);
324}
325
326void
327ixgb_reset(struct ixgb_adapter *adapter)
328{
3fd7131f 329 struct ixgb_hw *hw = &adapter->hw;
1da177e4 330
3fd7131f
MW		 331 ixgb_adapter_stop(hw);
332 if (!ixgb_init_hw(hw))
ec9c3f5d 333 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
3fd7131f
MW		 334
335 /* restore frame size information */
336 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
337 if (hw->max_frame_size >
338 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
339 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
340 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
341 ctrl0 |= IXGB_CTRL0_JFE;
342 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
343 }
344 }
1da177e4
LT		 345}
346
347/**
348 * ixgb_probe - Device Initialization Routine
349 * @pdev: PCI device information struct
350 * @ent: entry in ixgb_pci_tbl
351 *
352 * Returns 0 on success, negative on failure
353 *
354 * ixgb_probe initializes an adapter identified by a pci_dev structure.
355 * The OS initialization, configuring of the adapter private structure,
356 * and a hardware reset occur.
357 **/
358
359static int __devinit
360ixgb_probe(struct pci_dev *pdev,
361 const struct pci_device_id *ent)
362{
363 struct net_device *netdev = NULL;
364 struct ixgb_adapter *adapter;
365 static int cards_found = 0;
366 unsigned long mmio_start;
367 int mmio_len;
368 int pci_using_dac;
369 int i;
370 int err;
371
372 if((err = pci_enable_device(pdev)))
373 return err;
374
c91e468a
AS		 375 if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
376 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
1da177e4
LT		 377 pci_using_dac = 1;
378 } else {
c91e468a
AS		 379 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
380 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
ec9c3f5d
AK		 381 printk(KERN_ERR
382 "ixgb: No usable DMA configuration, aborting\n");
c91e468a 383 goto err_dma_mask;
1da177e4
LT		 384 }
385 pci_using_dac = 0;
386 }
387
388 if((err = pci_request_regions(pdev, ixgb_driver_name)))
c91e468a 389 goto err_request_regions;
1da177e4
LT		 390
391 pci_set_master(pdev);
392
393 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
394 if(!netdev) {
395 err = -ENOMEM;
396 goto err_alloc_etherdev;
397 }
398
1da177e4
LT		 399 SET_NETDEV_DEV(netdev, &pdev->dev);
400
401 pci_set_drvdata(pdev, netdev);
8908c6cd 402 adapter = netdev_priv(netdev);
1da177e4
LT		 403 adapter->netdev = netdev;
404 adapter->pdev = pdev;
405 adapter->hw.back = adapter;
ec9c3f5d 406 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
1da177e4
LT		 407
408 mmio_start = pci_resource_start(pdev, BAR_0);
409 mmio_len = pci_resource_len(pdev, BAR_0);
410
411 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
412 if(!adapter->hw.hw_addr) {
413 err = -EIO;
414 goto err_ioremap;
415 }
416
417 for(i = BAR_1; i <= BAR_5; i++) {
418 if(pci_resource_len(pdev, i) == 0)
419 continue;
420 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
421 adapter->hw.io_base = pci_resource_start(pdev, i);
422 break;
423 }
424 }
425
426 netdev->open = &ixgb_open;
427 netdev->stop = &ixgb_close;
428 netdev->hard_start_xmit = &ixgb_xmit_frame;
429 netdev->get_stats = &ixgb_get_stats;
430 netdev->set_multicast_list = &ixgb_set_multi;
431 netdev->set_mac_address = &ixgb_set_mac;
432 netdev->change_mtu = &ixgb_change_mtu;
433 ixgb_set_ethtool_ops(netdev);
434 netdev->tx_timeout = &ixgb_tx_timeout;
9b8118df 435 netdev->watchdog_timeo = 5 * HZ;
1da177e4 436#ifdef CONFIG_IXGB_NAPI
bea3348e 437 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4
LT		 438#endif
439 netdev->vlan_rx_register = ixgb_vlan_rx_register;
440 netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
441 netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
442#ifdef CONFIG_NET_POLL_CONTROLLER
443 netdev->poll_controller = ixgb_netpoll;
444#endif
445
0eb5a34c 446 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 447 netdev->mem_start = mmio_start;
448 netdev->mem_end = mmio_start + mmio_len;
449 netdev->base_addr = adapter->hw.io_base;
450
451 adapter->bd_number = cards_found;
452 adapter->link_speed = 0;
453 adapter->link_duplex = 0;
454
455 /* setup the private structure */
456
457 if((err = ixgb_sw_init(adapter)))
458 goto err_sw_init;
459
460 netdev->features = NETIF_F_SG |
461 NETIF_F_HW_CSUM |
462 NETIF_F_HW_VLAN_TX |
463 NETIF_F_HW_VLAN_RX |
464 NETIF_F_HW_VLAN_FILTER;
1da177e4 465 netdev->features |= NETIF_F_TSO;
f017f14b
AK		 466#ifdef NETIF_F_LLTX
467 netdev->features |= NETIF_F_LLTX;
468#endif
1da177e4
LT		 469
470 if(pci_using_dac)
471 netdev->features |= NETIF_F_HIGHDMA;
472
473 /* make sure the EEPROM is good */
474
475 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
ec9c3f5d 476 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 477 err = -EIO;
478 goto err_eeprom;
479 }
480
481 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
df859c51 482 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1da177e4 483
df859c51 484 if(!is_valid_ether_addr(netdev->perm_addr)) {
ec9c3f5d 485 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1da177e4
LT		 486 err = -EIO;
487 goto err_eeprom;
488 }
489
490 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
491
492 init_timer(&adapter->watchdog_timer);
493 adapter->watchdog_timer.function = &ixgb_watchdog;
494 adapter->watchdog_timer.data = (unsigned long)adapter;
495
c4028958 496 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 497
ec9c3f5d 498 strcpy(netdev->name, "eth%d");
1da177e4
LT		 499 if((err = register_netdev(netdev)))
500 goto err_register;
501
502 /* we're going to reset, so assume we have no link for now */
503
504 netif_carrier_off(netdev);
505 netif_stop_queue(netdev);
506
ec9c3f5d 507 DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
1da177e4
LT		 508 ixgb_check_options(adapter);
509 /* reset the hardware with the new settings */
510
511 ixgb_reset(adapter);
512
513 cards_found++;
514 return 0;
515
516err_register:
517err_sw_init:
518err_eeprom:
519 iounmap(adapter->hw.hw_addr);
520err_ioremap:
521 free_netdev(netdev);
522err_alloc_etherdev:
523 pci_release_regions(pdev);
c91e468a
AS		 524err_request_regions:
525err_dma_mask:
526 pci_disable_device(pdev);
1da177e4
LT		 527 return err;
528}
529
530/**
531 * ixgb_remove - Device Removal Routine
532 * @pdev: PCI device information struct
533 *
534 * ixgb_remove is called by the PCI subsystem to alert the driver
535 * that it should release a PCI device. The could be caused by a
536 * Hot-Plug event, or because the driver is going to be removed from
537 * memory.
538 **/
539
540static void __devexit
541ixgb_remove(struct pci_dev *pdev)
542{
543 struct net_device *netdev = pci_get_drvdata(pdev);
8908c6cd 544 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 545
546 unregister_netdev(netdev);
547
548 iounmap(adapter->hw.hw_addr);
549 pci_release_regions(pdev);
550
551 free_netdev(netdev);
552}
553
554/**
555 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
556 * @adapter: board private structure to initialize
557 *
558 * ixgb_sw_init initializes the Adapter private data structure.
559 * Fields are initialized based on PCI device information and
560 * OS network device settings (MTU size).
561 **/
562
563static int __devinit
564ixgb_sw_init(struct ixgb_adapter *adapter)
565{
566 struct ixgb_hw *hw = &adapter->hw;
567 struct net_device *netdev = adapter->netdev;
568 struct pci_dev *pdev = adapter->pdev;
569
570 /* PCI config space info */
571
572 hw->vendor_id = pdev->vendor;
573 hw->device_id = pdev->device;
574 hw->subsystem_vendor_id = pdev->subsystem_vendor;
575 hw->subsystem_id = pdev->subsystem_device;
576
1da177e4 577 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
3f3dc0dd 578 adapter->rx_buffer_len = hw->max_frame_size;
1da177e4
LT		 579
580 if((hw->device_id == IXGB_DEVICE_ID_82597EX)
940829e2
AK		 581 || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
582 || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
583 || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
1da177e4
LT		 584 hw->mac_type = ixgb_82597;
585 else {
586 /* should never have loaded on this device */
ec9c3f5d 587 DPRINTK(PROBE, ERR, "unsupported device id\n");
1da177e4
LT		 588 }
589
590 /* enable flow control to be programmed */
591 hw->fc.send_xon = 1;
592
1da177e4
LT		 593 spin_lock_init(&adapter->tx_lock);
594
bab2bce7 595 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 596 return 0;
597}
598
599/**
600 * ixgb_open - Called when a network interface is made active
601 * @netdev: network interface device structure
602 *
603 * Returns 0 on success, negative value on failure
604 *
605 * The open entry point is called when a network interface is made
606 * active by the system (IFF_UP). At this point all resources needed
607 * for transmit and receive operations are allocated, the interrupt
608 * handler is registered with the OS, the watchdog timer is started,
609 * and the stack is notified that the interface is ready.
610 **/
611
612static int
613ixgb_open(struct net_device *netdev)
614{
8908c6cd 615 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 616 int err;
617
618 /* allocate transmit descriptors */
619
620 if((err = ixgb_setup_tx_resources(adapter)))
621 goto err_setup_tx;
622
623 /* allocate receive descriptors */
624
625 if((err = ixgb_setup_rx_resources(adapter)))
626 goto err_setup_rx;
627
628 if((err = ixgb_up(adapter)))
629 goto err_up;
630
631 return 0;
632
633err_up:
634 ixgb_free_rx_resources(adapter);
635err_setup_rx:
636 ixgb_free_tx_resources(adapter);
637err_setup_tx:
638 ixgb_reset(adapter);
639
640 return err;
641}
642
643/**
644 * ixgb_close - Disables a network interface
645 * @netdev: network interface device structure
646 *
647 * Returns 0, this is not allowed to fail
648 *
649 * The close entry point is called when an interface is de-activated
650 * by the OS. The hardware is still under the drivers control, but
651 * needs to be disabled. A global MAC reset is issued to stop the
652 * hardware, and all transmit and receive resources are freed.
653 **/
654
655static int
656ixgb_close(struct net_device *netdev)
657{
8908c6cd 658 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 659
446490ca 660 ixgb_down(adapter, true);
1da177e4
LT		 661
662 ixgb_free_tx_resources(adapter);
663 ixgb_free_rx_resources(adapter);
664
665 return 0;
666}
667
668/**
669 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
670 * @adapter: board private structure
671 *
672 * Return 0 on success, negative on failure
673 **/
674
675int
676ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
677{
678 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
679 struct pci_dev *pdev = adapter->pdev;
680 int size;
681
682 size = sizeof(struct ixgb_buffer) * txdr->count;
683 txdr->buffer_info = vmalloc(size);
684 if(!txdr->buffer_info) {
ec9c3f5d
AK		 685 DPRINTK(PROBE, ERR,
686 "Unable to allocate transmit descriptor ring memory\n");
1da177e4
LT		 687 return -ENOMEM;
688 }
689 memset(txdr->buffer_info, 0, size);
690
691 /* round up to nearest 4K */
692
693 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 694 txdr->size = ALIGN(txdr->size, 4096);
1da177e4
LT		 695
696 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
697 if(!txdr->desc) {
698 vfree(txdr->buffer_info);
ec9c3f5d
AK		 699 DPRINTK(PROBE, ERR,
700 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 701 return -ENOMEM;
702 }
703 memset(txdr->desc, 0, txdr->size);
704
705 txdr->next_to_use = 0;
706 txdr->next_to_clean = 0;
707
708 return 0;
709}
710
711/**
712 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
713 * @adapter: board private structure
714 *
715 * Configure the Tx unit of the MAC after a reset.
716 **/
717
718static void
719ixgb_configure_tx(struct ixgb_adapter *adapter)
720{
222441a6
JP		 721 u64 tdba = adapter->tx_ring.dma;
722 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
723 u32 tctl;
1da177e4
LT		 724 struct ixgb_hw *hw = &adapter->hw;
725
726 /* Setup the Base and Length of the Tx Descriptor Ring
727 * tx_ring.dma can be either a 32 or 64 bit value
728 */
729
730 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
731 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
732
733 IXGB_WRITE_REG(hw, TDLEN, tdlen);
734
735 /* Setup the HW Tx Head and Tail descriptor pointers */
736
737 IXGB_WRITE_REG(hw, TDH, 0);
738 IXGB_WRITE_REG(hw, TDT, 0);
739
740 /* don't set up txdctl, it induces performance problems if configured
741 * incorrectly */
742 /* Set the Tx Interrupt Delay register */
743
744 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
745
746 /* Program the Transmit Control Register */
747
748 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
749 IXGB_WRITE_REG(hw, TCTL, tctl);
750
751 /* Setup Transmit Descriptor Settings for this adapter */
752 adapter->tx_cmd_type =
753 IXGB_TX_DESC_TYPE
754 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
755}
756
757/**
758 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
759 * @adapter: board private structure
760 *
761 * Returns 0 on success, negative on failure
762 **/
763
764int
765ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
766{
767 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
768 struct pci_dev *pdev = adapter->pdev;
769 int size;
770
771 size = sizeof(struct ixgb_buffer) * rxdr->count;
772 rxdr->buffer_info = vmalloc(size);
773 if(!rxdr->buffer_info) {
ec9c3f5d
AK		 774 DPRINTK(PROBE, ERR,
775 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 776 return -ENOMEM;
777 }
778 memset(rxdr->buffer_info, 0, size);
779
780 /* Round up to nearest 4K */
781
782 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 783 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4
LT		 784
785 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
786
787 if(!rxdr->desc) {
788 vfree(rxdr->buffer_info);
ec9c3f5d
AK		 789 DPRINTK(PROBE, ERR,
790 "Unable to allocate receive descriptors\n");
1da177e4
LT		 791 return -ENOMEM;
792 }
793 memset(rxdr->desc, 0, rxdr->size);
794
795 rxdr->next_to_clean = 0;
796 rxdr->next_to_use = 0;
797
798 return 0;
799}
800
801/**
802 * ixgb_setup_rctl - configure the receive control register
803 * @adapter: Board private structure
804 **/
805
806static void
807ixgb_setup_rctl(struct ixgb_adapter *adapter)
808{
222441a6 809 u32 rctl;
1da177e4
LT		 810
811 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
812
813 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
814
815 rctl |=
816 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
817 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
818 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
819
820 rctl |= IXGB_RCTL_SECRC;
821
3f3dc0dd 822 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 823 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 824 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 825 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 826 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 827 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 828 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 829 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 830
831 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
832}
833
834/**
835 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
836 * @adapter: board private structure
837 *
838 * Configure the Rx unit of the MAC after a reset.
839 **/
840
841static void
842ixgb_configure_rx(struct ixgb_adapter *adapter)
843{
222441a6
JP		 844 u64 rdba = adapter->rx_ring.dma;
845 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 846 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 847 u32 rctl;
848 u32 rxcsum;
849 u32 rxdctl;
1da177e4
LT		 850
851 /* make sure receives are disabled while setting up the descriptors */
852
853 rctl = IXGB_READ_REG(hw, RCTL);
854 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
855
856 /* set the Receive Delay Timer Register */
857
858 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
859
860 /* Setup the Base and Length of the Rx Descriptor Ring */
861
862 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
863 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
864
865 IXGB_WRITE_REG(hw, RDLEN, rdlen);
866
867 /* Setup the HW Rx Head and Tail Descriptor Pointers */
868 IXGB_WRITE_REG(hw, RDH, 0);
869 IXGB_WRITE_REG(hw, RDT, 0);
870
871 /* set up pre-fetching of receive buffers so we get some before we
872 * run out (default hardware behavior is to run out before fetching
873 * more). This sets up to fetch if HTHRESH rx descriptors are avail
874 * and the descriptors in hw cache are below PTHRESH. This avoids
875 * the hardware behavior of fetching <=512 descriptors in a single
876 * burst that pre-empts all other activity, usually causing fifo
877 * overflows. */
878 /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
879 rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT |
880 RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT |
881 RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
882 IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
883
884 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 885 if (adapter->rx_csum) {
1da177e4
LT		 886 rxcsum = IXGB_READ_REG(hw, RXCSUM);
887 rxcsum |= IXGB_RXCSUM_TUOFL;
888 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
889 }
890
891 /* Enable Receives */
892
893 IXGB_WRITE_REG(hw, RCTL, rctl);
894}
895
896/**
897 * ixgb_free_tx_resources - Free Tx Resources
898 * @adapter: board private structure
899 *
900 * Free all transmit software resources
901 **/
902
903void
904ixgb_free_tx_resources(struct ixgb_adapter *adapter)
905{
906 struct pci_dev *pdev = adapter->pdev;
907
908 ixgb_clean_tx_ring(adapter);
909
910 vfree(adapter->tx_ring.buffer_info);
911 adapter->tx_ring.buffer_info = NULL;
912
913 pci_free_consistent(pdev, adapter->tx_ring.size,
914 adapter->tx_ring.desc, adapter->tx_ring.dma);
915
916 adapter->tx_ring.desc = NULL;
917}
918
235949d1 919static void
1da177e4
LT		 920ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
921 struct ixgb_buffer *buffer_info)
922{
923 struct pci_dev *pdev = adapter->pdev;
1dfdd7df
AK		 924
925 if (buffer_info->dma)
926 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
927 PCI_DMA_TODEVICE);
928
929 if (buffer_info->skb)
1da177e4 930 dev_kfree_skb_any(buffer_info->skb);
1dfdd7df
AK		 931
932 buffer_info->skb = NULL;
933 buffer_info->dma = 0;
934 buffer_info->time_stamp = 0;
935 /* these fields must always be initialized in tx
936 * buffer_info->length = 0;
937 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 938}
939
940/**
941 * ixgb_clean_tx_ring - Free Tx Buffers
942 * @adapter: board private structure
943 **/
944
945static void
946ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
947{
948 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
949 struct ixgb_buffer *buffer_info;
950 unsigned long size;
951 unsigned int i;
952
953 /* Free all the Tx ring sk_buffs */
954
955 for(i = 0; i < tx_ring->count; i++) {
956 buffer_info = &tx_ring->buffer_info[i];
957 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
958 }
959
960 size = sizeof(struct ixgb_buffer) * tx_ring->count;
961 memset(tx_ring->buffer_info, 0, size);
962
963 /* Zero out the descriptor ring */
964
965 memset(tx_ring->desc, 0, tx_ring->size);
966
967 tx_ring->next_to_use = 0;
968 tx_ring->next_to_clean = 0;
969
970 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
971 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
972}
973
974/**
975 * ixgb_free_rx_resources - Free Rx Resources
976 * @adapter: board private structure
977 *
978 * Free all receive software resources
979 **/
980
981void
982ixgb_free_rx_resources(struct ixgb_adapter *adapter)
983{
984 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
985 struct pci_dev *pdev = adapter->pdev;
986
987 ixgb_clean_rx_ring(adapter);
988
989 vfree(rx_ring->buffer_info);
990 rx_ring->buffer_info = NULL;
991
992 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
993
994 rx_ring->desc = NULL;
995}
996
997/**
998 * ixgb_clean_rx_ring - Free Rx Buffers
999 * @adapter: board private structure
1000 **/
1001
1002static void
1003ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
1004{
1005 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1006 struct ixgb_buffer *buffer_info;
1007 struct pci_dev *pdev = adapter->pdev;
1008 unsigned long size;
1009 unsigned int i;
1010
1011 /* Free all the Rx ring sk_buffs */
1012
1013 for(i = 0; i < rx_ring->count; i++) {
1014 buffer_info = &rx_ring->buffer_info[i];
1015 if(buffer_info->skb) {
1016
1017 pci_unmap_single(pdev,
1018 buffer_info->dma,
1019 buffer_info->length,
1020 PCI_DMA_FROMDEVICE);
1021
1022 dev_kfree_skb(buffer_info->skb);
1023
1024 buffer_info->skb = NULL;
1025 }
1026 }
1027
1028 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1029 memset(rx_ring->buffer_info, 0, size);
1030
1031 /* Zero out the descriptor ring */
1032
1033 memset(rx_ring->desc, 0, rx_ring->size);
1034
1035 rx_ring->next_to_clean = 0;
1036 rx_ring->next_to_use = 0;
1037
1038 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1039 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1040}
1041
1042/**
1043 * ixgb_set_mac - Change the Ethernet Address of the NIC
1044 * @netdev: network interface device structure
1045 * @p: pointer to an address structure
1046 *
1047 * Returns 0 on success, negative on failure
1048 **/
1049
1050static int
1051ixgb_set_mac(struct net_device *netdev, void *p)
1052{
8908c6cd 1053 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1054 struct sockaddr *addr = p;
1055
1056 if(!is_valid_ether_addr(addr->sa_data))
1057 return -EADDRNOTAVAIL;
1058
1059 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1060
1061 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1062
1063 return 0;
1064}
1065
1066/**
1067 * ixgb_set_multi - Multicast and Promiscuous mode set
1068 * @netdev: network interface device structure
1069 *
1070 * The set_multi entry point is called whenever the multicast address
1071 * list or the network interface flags are updated. This routine is
1072 * responsible for configuring the hardware for proper multicast,
1073 * promiscuous mode, and all-multi behavior.
1074 **/
1075
1076static void
1077ixgb_set_multi(struct net_device *netdev)
1078{
8908c6cd 1079 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1080 struct ixgb_hw *hw = &adapter->hw;
1081 struct dev_mc_list *mc_ptr;
222441a6 1082 u32 rctl;
1da177e4
LT		 1083 int i;
1084
1085 /* Check for Promiscuous and All Multicast modes */
1086
1087 rctl = IXGB_READ_REG(hw, RCTL);
1088
1089 if(netdev->flags & IFF_PROMISC) {
1090 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1091 } else if(netdev->flags & IFF_ALLMULTI) {
1092 rctl |= IXGB_RCTL_MPE;
1093 rctl &= ~IXGB_RCTL_UPE;
1094 } else {
1095 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1096 }
1097
1098 if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1099 rctl |= IXGB_RCTL_MPE;
1100 IXGB_WRITE_REG(hw, RCTL, rctl);
1101 } else {
222441a6 1102 u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
273dc74e 1103 IXGB_ETH_LENGTH_OF_ADDRESS];
1da177e4
LT		 1104
1105 IXGB_WRITE_REG(hw, RCTL, rctl);
1106
1107 for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
1108 i++, mc_ptr = mc_ptr->next)
1109 memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
1110 mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1111
1112 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1113 }
1114}
1115
1116/**
1117 * ixgb_watchdog - Timer Call-back
1118 * @data: pointer to netdev cast into an unsigned long
1119 **/
1120
1121static void
1122ixgb_watchdog(unsigned long data)
1123{
1124 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1125 struct net_device *netdev = adapter->netdev;
1126 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1127
1128 ixgb_check_for_link(&adapter->hw);
1129
1130 if (ixgb_check_for_bad_link(&adapter->hw)) {
1131 /* force the reset path */
1132 netif_stop_queue(netdev);
1133 }
1134
1135 if(adapter->hw.link_up) {
1136 if(!netif_carrier_ok(netdev)) {
ec9c3f5d
AK		 1137 DPRINTK(LINK, INFO,
1138 "NIC Link is Up 10000 Mbps Full Duplex\n");
1da177e4
LT		 1139 adapter->link_speed = 10000;
1140 adapter->link_duplex = FULL_DUPLEX;
1141 netif_carrier_on(netdev);
1142 netif_wake_queue(netdev);
1143 }
1144 } else {
1145 if(netif_carrier_ok(netdev)) {
1146 adapter->link_speed = 0;
1147 adapter->link_duplex = 0;
ec9c3f5d 1148 DPRINTK(LINK, INFO, "NIC Link is Down\n");
1da177e4
LT		 1149 netif_carrier_off(netdev);
1150 netif_stop_queue(netdev);
1151
1152 }
1153 }
1154
1155 ixgb_update_stats(adapter);
1156
1157 if(!netif_carrier_ok(netdev)) {
1158 if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1159 /* We've lost link, so the controller stops DMA,
1160 * but we've got queued Tx work that's never going
1161 * to get done, so reset controller to flush Tx.
1162 * (Do the reset outside of interrupt context). */
1163 schedule_work(&adapter->tx_timeout_task);
1164 }
1165 }
1166
1167 /* Force detection of hung controller every watchdog period */
446490ca 1168 adapter->detect_tx_hung = true;
1da177e4
LT		 1169
1170 /* generate an interrupt to force clean up of any stragglers */
1171 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1172
1173 /* Reset the timer */
1174 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1175}
1176
1177#define IXGB_TX_FLAGS_CSUM 0x00000001
1178#define IXGB_TX_FLAGS_VLAN 0x00000002
1179#define IXGB_TX_FLAGS_TSO 0x00000004
1180
235949d1 1181static int
1da177e4
LT		 1182ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1183{
1da177e4
LT		 1184 struct ixgb_context_desc *context_desc;
1185 unsigned int i;
222441a6
JP		 1186 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1187 u16 ipcse, tucse, mss;
1da177e4
LT		 1188 int err;
1189
89114afd 1190 if (likely(skb_is_gso(skb))) {
adc54139 1191 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1192 struct iphdr *iph;
1193
1da177e4
LT		 1194 if (skb_header_cloned(skb)) {
1195 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1196 if (err)
1197 return err;
1198 }
1199
ab6a5bb6 1200 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1201 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1202 iph = ip_hdr(skb);
1203 iph->tot_len = 0;
1204 iph->check = 0;
aa8223c7
ACM		 1205 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1206 iph->daddr, 0,
1207 IPPROTO_TCP, 0);
bbe735e4 1208 ipcss = skb_network_offset(skb);
eddc9ec5 1209 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1210 ipcse = skb_transport_offset(skb) - 1;
1211 tucss = skb_transport_offset(skb);
aa8223c7 1212 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1213 tucse = 0;
1214
1215 i = adapter->tx_ring.next_to_use;
1216 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1217 buffer_info = &adapter->tx_ring.buffer_info[i];
1218 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1219
1220 context_desc->ipcss = ipcss;
1221 context_desc->ipcso = ipcso;
1222 context_desc->ipcse = cpu_to_le16(ipcse);
1223 context_desc->tucss = tucss;
1224 context_desc->tucso = tucso;
1225 context_desc->tucse = cpu_to_le16(tucse);
1226 context_desc->mss = cpu_to_le16(mss);
1227 context_desc->hdr_len = hdr_len;
1228 context_desc->status = 0;
1229 context_desc->cmd_type_len = cpu_to_le32(
1230 IXGB_CONTEXT_DESC_TYPE
1231 | IXGB_CONTEXT_DESC_CMD_TSE
1232 | IXGB_CONTEXT_DESC_CMD_IP
1233 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1234 | IXGB_CONTEXT_DESC_CMD_IDE
1235 | (skb->len - (hdr_len)));
1236
06c2f9ec 1237
1da177e4
LT		 1238 if(++i == adapter->tx_ring.count) i = 0;
1239 adapter->tx_ring.next_to_use = i;
1240
1241 return 1;
1242 }
1da177e4
LT		 1243
1244 return 0;
1245}
1246
446490ca 1247static bool
1da177e4
LT		 1248ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1249{
1250 struct ixgb_context_desc *context_desc;
1251 unsigned int i;
222441a6 1252 u8 css, cso;
1da177e4 1253
84fa7933 1254 if(likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1255 struct ixgb_buffer *buffer_info;
ea2ae17d 1256 css = skb_transport_offset(skb);
ff1dcadb 1257 cso = css + skb->csum_offset;
1da177e4
LT		 1258
1259 i = adapter->tx_ring.next_to_use;
1260 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1261 buffer_info = &adapter->tx_ring.buffer_info[i];
1262 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1263
1264 context_desc->tucss = css;
1265 context_desc->tucso = cso;
1266 context_desc->tucse = 0;
1267 /* zero out any previously existing data in one instruction */
222441a6 1268 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1269 context_desc->status = 0;
1270 context_desc->hdr_len = 0;
1271 context_desc->mss = 0;
1272 context_desc->cmd_type_len =
1273 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1274 | IXGB_TX_DESC_CMD_IDE);
1da177e4
LT		 1275
1276 if(++i == adapter->tx_ring.count) i = 0;
1277 adapter->tx_ring.next_to_use = i;
1278
446490ca 1279 return true;
1da177e4
LT		 1280 }
1281
446490ca 1282 return false;
1da177e4
LT		 1283}
1284
1285#define IXGB_MAX_TXD_PWR 14
1286#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1287
235949d1 1288static int
1da177e4
LT		 1289ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1290 unsigned int first)
1291{
1292 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1293 struct ixgb_buffer *buffer_info;
1294 int len = skb->len;
1295 unsigned int offset = 0, size, count = 0, i;
5d927853 1296 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1297
1298 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1299 unsigned int f;
ac79c82e 1300
1da177e4
LT		 1301 len -= skb->data_len;
1302
1303 i = tx_ring->next_to_use;
1304
1305 while(len) {
1306 buffer_info = &tx_ring->buffer_info[i];
709cf018 1307 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1308 /* Workaround for premature desc write-backs
1309 * in TSO mode. Append 4-byte sentinel desc */
1310 if (unlikely(mss && !nr_frags && size == len && size > 8))
1311 size -= 4;
1312
1da177e4 1313 buffer_info->length = size;
adc54139 1314 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1315 buffer_info->dma =
1316 pci_map_single(adapter->pdev,
1317 skb->data + offset,
1318 size,
1319 PCI_DMA_TODEVICE);
1320 buffer_info->time_stamp = jiffies;
1dfdd7df 1321 buffer_info->next_to_watch = 0;
1da177e4
LT		 1322
1323 len -= size;
1324 offset += size;
1325 count++;
1326 if(++i == tx_ring->count) i = 0;
1327 }
1328
1329 for(f = 0; f < nr_frags; f++) {
1330 struct skb_frag_struct *frag;
1331
1332 frag = &skb_shinfo(skb)->frags[f];
1333 len = frag->size;
1334 offset = 0;
1335
1336 while(len) {
1337 buffer_info = &tx_ring->buffer_info[i];
709cf018 1338 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1339
1340 /* Workaround for premature desc write-backs
1341 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1342 if (unlikely(mss && (f == (nr_frags - 1))
1343 && size == len && size > 8))
5d927853
JB		 1344 size -= 4;
1345
1da177e4
LT		 1346 buffer_info->length = size;
1347 buffer_info->dma =
1348 pci_map_page(adapter->pdev,
1349 frag->page,
1350 frag->page_offset + offset,
1351 size,
1352 PCI_DMA_TODEVICE);
1353 buffer_info->time_stamp = jiffies;
1dfdd7df 1354 buffer_info->next_to_watch = 0;
1da177e4
LT		 1355
1356 len -= size;
1357 offset += size;
1358 count++;
1359 if(++i == tx_ring->count) i = 0;
1360 }
1361 }
1362 i = (i == 0) ? tx_ring->count - 1 : i - 1;
1363 tx_ring->buffer_info[i].skb = skb;
1364 tx_ring->buffer_info[first].next_to_watch = i;
1365
1366 return count;
1367}
1368
235949d1 1369static void
1da177e4
LT		 1370ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1371{
1372 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1373 struct ixgb_tx_desc *tx_desc = NULL;
1374 struct ixgb_buffer *buffer_info;
222441a6
JP		 1375 u32 cmd_type_len = adapter->tx_cmd_type;
1376 u8 status = 0;
1377 u8 popts = 0;
1da177e4
LT		 1378 unsigned int i;
1379
1380 if(tx_flags & IXGB_TX_FLAGS_TSO) {
1381 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1382 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1383 }
1384
1385 if(tx_flags & IXGB_TX_FLAGS_CSUM)
1386 popts |= IXGB_TX_DESC_POPTS_TXSM;
1387
1388 if(tx_flags & IXGB_TX_FLAGS_VLAN) {
1389 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1390 }
1391
1392 i = tx_ring->next_to_use;
1393
1394 while(count--) {
1395 buffer_info = &tx_ring->buffer_info[i];
1396 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1397 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1398 tx_desc->cmd_type_len =
1399 cpu_to_le32(cmd_type_len | buffer_info->length);
1400 tx_desc->status = status;
1401 tx_desc->popts = popts;
1402 tx_desc->vlan = cpu_to_le16(vlan_id);
1403
1404 if(++i == tx_ring->count) i = 0;
1405 }
1406
1407 tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1408 | IXGB_TX_DESC_CMD_RS );
1409
1410 /* Force memory writes to complete before letting h/w
1411 * know there are new descriptors to fetch. (Only
1412 * applicable for weak-ordered memory model archs,
1413 * such as IA-64). */
1414 wmb();
1415
1416 tx_ring->next_to_use = i;
1417 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1418}
1419
dfd341e4
JB		 1420static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1421{
1422 struct ixgb_adapter *adapter = netdev_priv(netdev);
1423 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1424
1425 netif_stop_queue(netdev);
1426 /* Herbert's original patch had:
1427 * smp_mb__after_netif_stop_queue();
1428 * but since that doesn't exist yet, just open code it. */
1429 smp_mb();
1430
1431 /* We need to check again in a case another CPU has just
1432 * made room available. */
1433 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1434 return -EBUSY;
1435
1436 /* A reprieve! */
1437 netif_start_queue(netdev);
1438 ++adapter->restart_queue;
1439 return 0;
1440}
1441
1442static int ixgb_maybe_stop_tx(struct net_device *netdev,
1443 struct ixgb_desc_ring *tx_ring, int size)
1444{
1445 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1446 return 0;
1447 return __ixgb_maybe_stop_tx(netdev, size);
1448}
1449
1450
1da177e4
LT		 1451/* Tx Descriptors needed, worst case */
1452#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1453 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1454#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1455 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1456 + 1 /* one more needed for sentinel TSO workaround */
1da177e4
LT		 1457
1458static int
1459ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1460{
8908c6cd 1461 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1462 unsigned int first;
1463 unsigned int tx_flags = 0;
1464 unsigned long flags;
1465 int vlan_id = 0;
1466 int tso;
1467
bab2bce7
JB		 1468 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1469 dev_kfree_skb(skb);
1470 return NETDEV_TX_OK;
1471 }
1472
1da177e4
LT		 1473 if(skb->len <= 0) {
1474 dev_kfree_skb_any(skb);
1475 return 0;
1476 }
1477
f017f14b 1478#ifdef NETIF_F_LLTX
bab2bce7 1479 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
f017f14b
AK		 1480 /* Collision - tell upper layer to requeue */
1481 local_irq_restore(flags);
1482 return NETDEV_TX_LOCKED;
1483 }
1484#else
1da177e4 1485 spin_lock_irqsave(&adapter->tx_lock, flags);
f017f14b
AK		 1486#endif
1487
dfd341e4
JB		 1488 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
1489 DESC_NEEDED))) {
1da177e4
LT		 1490 netif_stop_queue(netdev);
1491 spin_unlock_irqrestore(&adapter->tx_lock, flags);
f017f14b 1492 return NETDEV_TX_BUSY;
1da177e4 1493 }
f017f14b
AK		 1494
1495#ifndef NETIF_F_LLTX
1da177e4 1496 spin_unlock_irqrestore(&adapter->tx_lock, flags);
f017f14b 1497#endif
1da177e4
LT		 1498
1499 if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
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;
1505
1506 tso = ixgb_tso(adapter, skb);
1507 if (tso < 0) {
1508 dev_kfree_skb_any(skb);
f017f14b
AK		 1509#ifdef NETIF_F_LLTX
1510 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1511#endif
1da177e4
LT		 1512 return NETDEV_TX_OK;
1513 }
1514
96f9c2e2 1515 if (likely(tso))
1da177e4
LT		 1516 tx_flags |= IXGB_TX_FLAGS_TSO;
1517 else if(ixgb_tx_csum(adapter, skb))
1518 tx_flags |= IXGB_TX_FLAGS_CSUM;
1519
1520 ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1521 tx_flags);
1522
1523 netdev->trans_start = jiffies;
1524
f017f14b
AK		 1525#ifdef NETIF_F_LLTX
1526 /* Make sure there is space in the ring for the next send. */
dfd341e4 1527 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
f017f14b
AK		 1528
1529 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1530
1531#endif
1532 return NETDEV_TX_OK;
1da177e4
LT		 1533}
1534
1535/**
1536 * ixgb_tx_timeout - Respond to a Tx Hang
1537 * @netdev: network interface device structure
1538 **/
1539
1540static void
1541ixgb_tx_timeout(struct net_device *netdev)
1542{
8908c6cd 1543 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1544
1545 /* Do the reset outside of interrupt context */
1546 schedule_work(&adapter->tx_timeout_task);
1547}
1548
1549static void
c4028958 1550ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1551{
c4028958
DH		 1552 struct ixgb_adapter *adapter =
1553 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1554
9b8118df 1555 adapter->tx_timeout_count++;
446490ca 1556 ixgb_down(adapter, true);
1da177e4
LT		 1557 ixgb_up(adapter);
1558}
1559
1560/**
1561 * ixgb_get_stats - Get System Network Statistics
1562 * @netdev: network interface device structure
1563 *
1564 * Returns the address of the device statistics structure.
1565 * The statistics are actually updated from the timer callback.
1566 **/
1567
1568static struct net_device_stats *
1569ixgb_get_stats(struct net_device *netdev)
1570{
8908c6cd 1571 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1572
1573 return &adapter->net_stats;
1574}
1575
1576/**
1577 * ixgb_change_mtu - Change the Maximum Transfer Unit
1578 * @netdev: network interface device structure
1579 * @new_mtu: new value for maximum frame size
1580 *
1581 * Returns 0 on success, negative on failure
1582 **/
1583
1584static int
1585ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1586{
8908c6cd 1587 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1588 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1589 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1590
1591
1592 if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1593 || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
ec9c3f5d 1594 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1595 return -EINVAL;
1596 }
1597
3f3dc0dd 1598 adapter->rx_buffer_len = max_frame;
1da177e4
LT		 1599
1600 netdev->mtu = new_mtu;
1601
3f3dc0dd 1602 if ((old_max_frame != max_frame) && netif_running(netdev)) {
446490ca 1603 ixgb_down(adapter, true);
1da177e4
LT		 1604 ixgb_up(adapter);
1605 }
1606
1607 return 0;
1608}
1609
1610/**
1611 * ixgb_update_stats - Update the board statistics counters.
1612 * @adapter: board private structure
1613 **/
1614
1615void
1616ixgb_update_stats(struct ixgb_adapter *adapter)
1617{
5633684d 1618 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1619 struct pci_dev *pdev = adapter->pdev;
1620
1621 /* Prevent stats update while adapter is being reset */
81b1955e 1622 if (pci_channel_offline(pdev))
01748fbb 1623 return;
5633684d
MC		 1624
1625 if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
1626 (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1627 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1628 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1629 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1630 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1631
1632 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1633 /* fix up multicast stats by removing broadcasts */
7b89178d
MC		 1634 if(multi >= bcast)
1635 multi -= bcast;
5633684d
MC		 1636
1637 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1638 adapter->stats.mprch += (multi >> 32);
1639 adapter->stats.bprcl += bcast_l;
1640 adapter->stats.bprch += bcast_h;
1641 } else {
1642 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1643 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1644 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1645 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1646 }
1da177e4
LT		 1647 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1648 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1649 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1650 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1651 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1652 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1653 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1654 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1655 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1656 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1657 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1658 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1659 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1660 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1661 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1662 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1663 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1664 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1665 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1666 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1667 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1668 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1669 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1670 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1671 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1672 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1673 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1674 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1675 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1676 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1677 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1678 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1679 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1680 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1681 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1682 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1683 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1684 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1685 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1686 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1687 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1688 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1689 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1690 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1691 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1692 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1693 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1694 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1695 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1696 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1697 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1698 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1699 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1700 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1701 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1702 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1703
1704 /* Fill out the OS statistics structure */
1705
1706 adapter->net_stats.rx_packets = adapter->stats.gprcl;
1707 adapter->net_stats.tx_packets = adapter->stats.gptcl;
1708 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1709 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1710 adapter->net_stats.multicast = adapter->stats.mprcl;
1711 adapter->net_stats.collisions = 0;
1712
1713 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1714 * with a length in the type/len field */
1715 adapter->net_stats.rx_errors =
1716 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1717 adapter->stats.ruc +
1718 adapter->stats.roc /*+ adapter->stats.rlec */ +
1719 adapter->stats.icbc +
1720 adapter->stats.ecbc + adapter->stats.mpc;
1721
1da177e4
LT		 1722 /* see above
1723 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1724 */
1725
1726 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1727 adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1728 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1729 adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1730
1731 adapter->net_stats.tx_errors = 0;
1732 adapter->net_stats.rx_frame_errors = 0;
1733 adapter->net_stats.tx_aborted_errors = 0;
1734 adapter->net_stats.tx_carrier_errors = 0;
1735 adapter->net_stats.tx_fifo_errors = 0;
1736 adapter->net_stats.tx_heartbeat_errors = 0;
1737 adapter->net_stats.tx_window_errors = 0;
1738}
1739
1740#define IXGB_MAX_INTR 10
1741/**
1742 * ixgb_intr - Interrupt Handler
1743 * @irq: interrupt number
1744 * @data: pointer to a network interface device structure
1da177e4
LT		 1745 **/
1746
1747static irqreturn_t
7d12e780 1748ixgb_intr(int irq, void *data)
1da177e4
LT		 1749{
1750 struct net_device *netdev = data;
8908c6cd 1751 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1752 struct ixgb_hw *hw = &adapter->hw;
222441a6 1753 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4
LT		 1754#ifndef CONFIG_IXGB_NAPI
1755 unsigned int i;
1756#endif
1757
1758 if(unlikely(!icr))
1759 return IRQ_NONE; /* Not our interrupt */
1760
bab2bce7
JB		 1761 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1762 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1763 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4
LT		 1764
1765#ifdef CONFIG_IXGB_NAPI
bea3348e 1766 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1da177e4
LT		 1767
1768 /* Disable interrupts and register for poll. The flush
1769 of the posted write is intentionally left out.
1770 */
1771
1da177e4 1772 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
bea3348e 1773 __netif_rx_schedule(netdev, &adapter->napi);
1da177e4
LT		 1774 }
1775#else
1776 /* yes, that is actually a & and it is meant to make sure that
1777 * every pass through this for loop checks both receive and
1778 * transmit queues for completed descriptors, intended to
1779 * avoid starvation issues and assist tx/rx fairness. */
1780 for(i = 0; i < IXGB_MAX_INTR; i++)
1781 if(!ixgb_clean_rx_irq(adapter) &
1782 !ixgb_clean_tx_irq(adapter))
1783 break;
1784#endif
1785 return IRQ_HANDLED;
1786}
1787
1788#ifdef CONFIG_IXGB_NAPI
1789/**
1790 * ixgb_clean - NAPI Rx polling callback
1791 * @adapter: board private structure
1792 **/
1793
1794static int
bea3348e 1795ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1796{
bea3348e
SH		 1797 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1798 struct net_device *netdev = adapter->netdev;
1da177e4
LT		 1799 int work_done = 0;
1800
53e52c72 1801 ixgb_clean_tx_irq(adapter);
bea3348e 1802 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1803
53e52c72
DM		 1804 /* If budget not fully consumed, exit the polling mode */
1805 if (work_done < budget) {
bea3348e 1806 netif_rx_complete(netdev, napi);
1da177e4 1807 ixgb_irq_enable(adapter);
1da177e4
LT		 1808 }
1809
bea3348e 1810 return work_done;
1da177e4
LT		 1811}
1812#endif
1813
1814/**
1815 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1816 * @adapter: board private structure
1817 **/
1818
446490ca 1819static bool
1da177e4
LT		 1820ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1821{
1822 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1823 struct net_device *netdev = adapter->netdev;
1824 struct ixgb_tx_desc *tx_desc, *eop_desc;
1825 struct ixgb_buffer *buffer_info;
1826 unsigned int i, eop;
446490ca 1827 bool cleaned = false;
1da177e4
LT		 1828
1829 i = tx_ring->next_to_clean;
1830 eop = tx_ring->buffer_info[i].next_to_watch;
1831 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1832
1833 while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1834
446490ca 1835 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1836 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1837 buffer_info = &tx_ring->buffer_info[i];
1838
1839 if (tx_desc->popts
1840 & (IXGB_TX_DESC_POPTS_TXSM |
1841 IXGB_TX_DESC_POPTS_IXSM))
1842 adapter->hw_csum_tx_good++;
1843
1844 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1845
222441a6 1846 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1847
1848 cleaned = (i == eop);
1849 if(++i == tx_ring->count) i = 0;
1850 }
1851
1852 eop = tx_ring->buffer_info[i].next_to_watch;
1853 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1854 }
1855
1856 tx_ring->next_to_clean = i;
1857
0f8ecbad
JB		 1858 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1859 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1860 /* Make sure that anybody stopping the queue after this
1861 * sees the new next_to_clean. */
1862 smp_mb();
1863
1864 if (netif_queue_stopped(netdev) &&
1865 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1866 netif_wake_queue(netdev);
0f8ecbad
JB		 1867 ++adapter->restart_queue;
1868 }
1da177e4 1869 }
1da177e4
LT		 1870
1871 if(adapter->detect_tx_hung) {
1872 /* detect a transmit hang in hardware, this serializes the
1873 * check with the clearing of time_stamp and movement of i */
446490ca 1874 adapter->detect_tx_hung = false;
9b8118df
AK		 1875 if (tx_ring->buffer_info[eop].dma &&
1876 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1877 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1878 IXGB_STATUS_TXOFF)) {
1879 /* detected Tx unit hang */
1880 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1881 " TDH <%x>\n"
1882 " TDT <%x>\n"
1883 " next_to_use <%x>\n"
1884 " next_to_clean <%x>\n"
1885 "buffer_info[next_to_clean]\n"
1886 " time_stamp <%lx>\n"
1887 " next_to_watch <%x>\n"
1888 " jiffies <%lx>\n"
1889 " next_to_watch.status <%x>\n",
1890 IXGB_READ_REG(&adapter->hw, TDH),
1891 IXGB_READ_REG(&adapter->hw, TDT),
1892 tx_ring->next_to_use,
1893 tx_ring->next_to_clean,
1894 tx_ring->buffer_info[eop].time_stamp,
1895 eop,
1896 jiffies,
1897 eop_desc->status);
1da177e4 1898 netif_stop_queue(netdev);
9b8118df 1899 }
1da177e4
LT		 1900 }
1901
1902 return cleaned;
1903}
1904
1905/**
1906 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1907 * @adapter: board private structure
1908 * @rx_desc: receive descriptor
1909 * @sk_buff: socket buffer with received data
1910 **/
1911
235949d1 1912static void
1da177e4
LT		 1913ixgb_rx_checksum(struct ixgb_adapter *adapter,
1914 struct ixgb_rx_desc *rx_desc,
1915 struct sk_buff *skb)
1916{
1917 /* Ignore Checksum bit is set OR
1918 * TCP Checksum has not been calculated
1919 */
1920 if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1921 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1922 skb->ip_summed = CHECKSUM_NONE;
1923 return;
1924 }
1925
1926 /* At this point we know the hardware did the TCP checksum */
1927 /* now look at the TCP checksum error bit */
1928 if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1929 /* let the stack verify checksum errors */
1930 skb->ip_summed = CHECKSUM_NONE;
1931 adapter->hw_csum_rx_error++;
1932 } else {
1933 /* TCP checksum is good */
1934 skb->ip_summed = CHECKSUM_UNNECESSARY;
1935 adapter->hw_csum_rx_good++;
1936 }
1937}
1938
1939/**
1940 * ixgb_clean_rx_irq - Send received data up the network stack,
1941 * @adapter: board private structure
1942 **/
1943
446490ca 1944static bool
1da177e4
LT		 1945#ifdef CONFIG_IXGB_NAPI
1946ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1947#else
1948ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1949#endif
1950{
1951 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1952 struct net_device *netdev = adapter->netdev;
1953 struct pci_dev *pdev = adapter->pdev;
1954 struct ixgb_rx_desc *rx_desc, *next_rxd;
1955 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 1956 u32 length;
1da177e4 1957 unsigned int i, j;
446490ca 1958 bool cleaned = false;
1da177e4
LT		 1959
1960 i = rx_ring->next_to_clean;
1961 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1962 buffer_info = &rx_ring->buffer_info[i];
1963
1964 while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
f404de1c
MC		 1965 struct sk_buff *skb, *next_skb;
1966 u8 status;
1da177e4
LT		 1967
1968#ifdef CONFIG_IXGB_NAPI
1969 if(*work_done >= work_to_do)
1970 break;
1971
1972 (*work_done)++;
1973#endif
f404de1c 1974 status = rx_desc->status;
1da177e4 1975 skb = buffer_info->skb;
1dfdd7df 1976 buffer_info->skb = NULL;
f404de1c 1977
1da177e4
LT		 1978 prefetch(skb->data);
1979
1980 if(++i == rx_ring->count) i = 0;
1981 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1982 prefetch(next_rxd);
1983
1984 if((j = i + 1) == rx_ring->count) j = 0;
1985 next2_buffer = &rx_ring->buffer_info[j];
1986 prefetch(next2_buffer);
1987
1988 next_buffer = &rx_ring->buffer_info[i];
1989 next_skb = next_buffer->skb;
1990 prefetch(next_skb);
1991
446490ca 1992 cleaned = true;
1da177e4
LT		 1993
1994 pci_unmap_single(pdev,
1995 buffer_info->dma,
1996 buffer_info->length,
1997 PCI_DMA_FROMDEVICE);
1998
1999 length = le16_to_cpu(rx_desc->length);
2000
f404de1c 2001 if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 2002
2003 /* All receives must fit into a single buffer */
2004
2005 IXGB_DBG("Receive packet consumed multiple buffers "
2006 "length<%x>\n", length);
2007
2008 dev_kfree_skb_irq(skb);
f404de1c 2009 goto rxdesc_done;
1da177e4
LT		 2010 }
2011
2012 if (unlikely(rx_desc->errors
2013 & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
2014 | IXGB_RX_DESC_ERRORS_P |
2015 IXGB_RX_DESC_ERRORS_RXE))) {
2016
2017 dev_kfree_skb_irq(skb);
f404de1c 2018 goto rxdesc_done;
1da177e4
LT		 2019 }
2020
6b900bb4
AK		 2021 /* code added for copybreak, this should improve
2022 * performance for small packets with large amounts
2023 * of reassembly being done in the stack */
2024#define IXGB_CB_LENGTH 256
2025 if (length < IXGB_CB_LENGTH) {
2026 struct sk_buff *new_skb =
5791704f 2027 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
6b900bb4
AK		 2028 if (new_skb) {
2029 skb_reserve(new_skb, NET_IP_ALIGN);
27d7ff46
ACM		 2030 skb_copy_to_linear_data_offset(new_skb,
2031 -NET_IP_ALIGN,
2032 (skb->data -
2033 NET_IP_ALIGN),
2034 (length +
2035 NET_IP_ALIGN));
6b900bb4
AK		 2036 /* save the skb in buffer_info as good */
2037 buffer_info->skb = skb;
2038 skb = new_skb;
2039 }
2040 }
2041 /* end copybreak code */
2042
1da177e4
LT		 2043 /* Good Receive */
2044 skb_put(skb, length);
2045
2046 /* Receive Checksum Offload */
2047 ixgb_rx_checksum(adapter, rx_desc, skb);
2048
2049 skb->protocol = eth_type_trans(skb, netdev);
2050#ifdef CONFIG_IXGB_NAPI
f404de1c 2051 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2052 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
38b22195 2053 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2054 } else {
2055 netif_receive_skb(skb);
2056 }
2057#else /* CONFIG_IXGB_NAPI */
f404de1c 2058 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
1da177e4 2059 vlan_hwaccel_rx(skb, adapter->vlgrp,
38b22195 2060 le16_to_cpu(rx_desc->special));
1da177e4
LT		 2061 } else {
2062 netif_rx(skb);
2063 }
2064#endif /* CONFIG_IXGB_NAPI */
2065 netdev->last_rx = jiffies;
2066
f404de1c
MC		 2067rxdesc_done:
2068 /* clean up descriptor, might be written over by hw */
1da177e4 2069 rx_desc->status = 0;
1da177e4 2070
f404de1c 2071 /* use prefetched values */
1da177e4
LT		 2072 rx_desc = next_rxd;
2073 buffer_info = next_buffer;
2074 }
2075
2076 rx_ring->next_to_clean = i;
2077
2078 ixgb_alloc_rx_buffers(adapter);
2079
2080 return cleaned;
2081}
2082
2083/**
2084 * ixgb_alloc_rx_buffers - Replace used receive buffers
2085 * @adapter: address of board private structure
2086 **/
2087
2088static void
2089ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
2090{
2091 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2092 struct net_device *netdev = adapter->netdev;
2093 struct pci_dev *pdev = adapter->pdev;
2094 struct ixgb_rx_desc *rx_desc;
2095 struct ixgb_buffer *buffer_info;
2096 struct sk_buff *skb;
2097 unsigned int i;
1da177e4
LT		 2098 long cleancount;
2099
2100 i = rx_ring->next_to_use;
2101 buffer_info = &rx_ring->buffer_info[i];
2102 cleancount = IXGB_DESC_UNUSED(rx_ring);
2103
1da177e4 2104
41639fed
MC		 2105 /* leave three descriptors unused */
2106 while(--cleancount > 2) {
1dfdd7df 2107 /* recycle! its good for you */
69c7a940
AK		 2108 skb = buffer_info->skb;
2109 if (skb) {
1dfdd7df
AK		 2110 skb_trim(skb, 0);
2111 goto map_skb;
2112 }
1da177e4 2113
69c7a940
AK		 2114 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2115 + NET_IP_ALIGN);
1dfdd7df 2116 if (unlikely(!skb)) {
1da177e4 2117 /* Better luck next round */
1dfdd7df 2118 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2119 break;
2120 }
2121
2122 /* Make buffer alignment 2 beyond a 16 byte boundary
2123 * this will result in a 16 byte aligned IP header after
2124 * the 14 byte MAC header is removed
2125 */
2126 skb_reserve(skb, NET_IP_ALIGN);
2127
1da177e4
LT		 2128 buffer_info->skb = skb;
2129 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df
AK		 2130map_skb:
2131 buffer_info->dma = pci_map_single(pdev,
2132 skb->data,
2133 adapter->rx_buffer_len,
2134 PCI_DMA_FROMDEVICE);
1da177e4 2135
1dfdd7df 2136 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2137 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed
MC		 2138 /* guarantee DD bit not set now before h/w gets descriptor
2139 * this is the rest of the workaround for h/w double
2140 * writeback. */
2141 rx_desc->status = 0;
1da177e4 2142
1da177e4
LT		 2143
2144 if(++i == rx_ring->count) i = 0;
2145 buffer_info = &rx_ring->buffer_info[i];
2146 }
2147
1dfdd7df
AK		 2148 if (likely(rx_ring->next_to_use != i)) {
2149 rx_ring->next_to_use = i;
2150 if (unlikely(i-- == 0))
2151 i = (rx_ring->count - 1);
2152
2153 /* Force memory writes to complete before letting h/w
2154 * know there are new descriptors to fetch. (Only
2155 * applicable for weak-ordered memory model archs, such
2156 * as IA-64). */
2157 wmb();
2158 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2159 }
1da177e4
LT		 2160}
2161
2162/**
2163 * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2164 *
2165 * @param netdev network interface device structure
2166 * @param grp indicates to enable or disable tagging/stripping
2167 **/
2168static void
2169ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2170{
8908c6cd 2171 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2172 u32 ctrl, rctl;
1da177e4
LT		 2173
2174 ixgb_irq_disable(adapter);
2175 adapter->vlgrp = grp;
2176
2177 if(grp) {
2178 /* enable VLAN tag insert/strip */
2179 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2180 ctrl |= IXGB_CTRL0_VME;
2181 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2182
2183 /* enable VLAN receive filtering */
2184
2185 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2186 rctl |= IXGB_RCTL_VFE;
2187 rctl &= ~IXGB_RCTL_CFIEN;
2188 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2189 } else {
2190 /* disable VLAN tag insert/strip */
2191
2192 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2193 ctrl &= ~IXGB_CTRL0_VME;
2194 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2195
2196 /* disable VLAN filtering */
2197
2198 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2199 rctl &= ~IXGB_RCTL_VFE;
2200 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2201 }
2202
bab2bce7
JB		 2203 /* don't enable interrupts unless we are UP */
2204 if (adapter->netdev->flags & IFF_UP)
2205 ixgb_irq_enable(adapter);
1da177e4
LT		 2206}
2207
2208static void
222441a6 2209ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2210{
8908c6cd 2211 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2212 u32 vfta, index;
1da177e4
LT		 2213
2214 /* add VID to filter table */
2215
2216 index = (vid >> 5) & 0x7F;
2217 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2218 vfta |= (1 << (vid & 0x1F));
2219 ixgb_write_vfta(&adapter->hw, index, vfta);
2220}
2221
2222static void
222441a6 2223ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2224{
8908c6cd 2225 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2226 u32 vfta, index;
1da177e4
LT		 2227
2228 ixgb_irq_disable(adapter);
2229
5c15bdec 2230 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4 2231
bab2bce7
JB		 2232 /* don't enable interrupts unless we are UP */
2233 if (adapter->netdev->flags & IFF_UP)
2234 ixgb_irq_enable(adapter);
1da177e4 2235
bab2bce7 2236 /* remove VID from filter table */
1da177e4
LT		 2237
2238 index = (vid >> 5) & 0x7F;
2239 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2240 vfta &= ~(1 << (vid & 0x1F));
2241 ixgb_write_vfta(&adapter->hw, index, vfta);
2242}
2243
2244static void
2245ixgb_restore_vlan(struct ixgb_adapter *adapter)
2246{
2247 ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2248
2249 if(adapter->vlgrp) {
222441a6 2250 u16 vid;
1da177e4 2251 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5c15bdec 2252 if(!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 2253 continue;
2254 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2255 }
2256 }
2257}
2258
1da177e4
LT		 2259#ifdef CONFIG_NET_POLL_CONTROLLER
2260/*
2261 * Polling 'interrupt' - used by things like netconsole to send skbs
2262 * without having to re-enable interrupts. It's not called while
2263 * the interrupt routine is executing.
2264 */
2265
2266static void ixgb_netpoll(struct net_device *dev)
2267{
f990b426 2268 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2269
1da177e4 2270 disable_irq(adapter->pdev->irq);
7d12e780 2271 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2272 enable_irq(adapter->pdev->irq);
2273}
2274#endif
2275
01748fbb
LV		 2276/**
2277 * ixgb_io_error_detected() - called when PCI error is detected
2278 * @pdev pointer to pci device with error
2279 * @state pci channel state after error
2280 *
2281 * This callback is called by the PCI subsystem whenever
2282 * a PCI bus error is detected.
2283 */
2284static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
2285 enum pci_channel_state state)
2286{
2287 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2288 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2289
2290 if(netif_running(netdev))
446490ca 2291 ixgb_down(adapter, true);
01748fbb
LV		 2292
2293 pci_disable_device(pdev);
2294
2295 /* Request a slot reset. */
2296 return PCI_ERS_RESULT_NEED_RESET;
2297}
2298
2299/**
2300 * ixgb_io_slot_reset - called after the pci bus has been reset.
2301 * @pdev pointer to pci device with error
2302 *
2303 * This callback is called after the PCI buss has been reset.
2304 * Basically, this tries to restart the card from scratch.
2305 * This is a shortened version of the device probe/discovery code,
2306 * it resembles the first-half of the ixgb_probe() routine.
2307 */
2308static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev)
2309{
2310 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2311 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2312
2313 if(pci_enable_device(pdev)) {
2314 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2315 return PCI_ERS_RESULT_DISCONNECT;
2316 }
2317
2318 /* Perform card reset only on one instance of the card */
2319 if (0 != PCI_FUNC (pdev->devfn))
2320 return PCI_ERS_RESULT_RECOVERED;
2321
2322 pci_set_master(pdev);
2323
2324 netif_carrier_off(netdev);
2325 netif_stop_queue(netdev);
2326 ixgb_reset(adapter);
2327
2328 /* Make sure the EEPROM is good */
2329 if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
2330 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2331 return PCI_ERS_RESULT_DISCONNECT;
2332 }
2333 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2334 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2335
2336 if(!is_valid_ether_addr(netdev->perm_addr)) {
2337 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2338 return PCI_ERS_RESULT_DISCONNECT;
2339 }
2340
2341 return PCI_ERS_RESULT_RECOVERED;
2342}
2343
2344/**
2345 * ixgb_io_resume - called when its OK to resume normal operations
2346 * @pdev pointer to pci device with error
2347 *
2348 * The error recovery driver tells us that its OK to resume
2349 * normal operation. Implementation resembles the second-half
2350 * of the ixgb_probe() routine.
2351 */
2352static void ixgb_io_resume (struct pci_dev *pdev)
2353{
2354 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2355 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2356
2357 pci_set_master(pdev);
2358
2359 if(netif_running(netdev)) {
2360 if(ixgb_up(adapter)) {
2361 printk ("ixgb: can't bring device back up after reset\n");
2362 return;
2363 }
2364 }
2365
2366 netif_device_attach(netdev);
2367 mod_timer(&adapter->watchdog_timer, jiffies);
2368}
2369
1da177e4 2370/* ixgb_main.c */
Linux kernel - Deliverables
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