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Merge tag 'v3.10.76' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / ethernet / intel / ixgb / ixgb_main.c
CommitLineData
1da177e4
LT		 1/*******************************************************************************
2
0abb6eb1 3 Intel PRO/10GbE Linux driver
f731a9ef 4 Copyright(c) 1999 - 2008 Intel Corporation.
0abb6eb1
AK		 5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
1da177e4 13 more details.
0abb6eb1 14
1da177e4 15 You should have received a copy of the GNU General Public License along with
0abb6eb1
AK		 16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
1da177e4
LT		 22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
0abb6eb1 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
1da177e4
LT		 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
d328bc83
JP		 29#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
70c71606 31#include <linux/prefetch.h>
1da177e4
LT		 32#include "ixgb.h"
33
1da177e4 34char ixgb_driver_name[] = "ixgb";
e9ab1d14 35static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
1da177e4 36
1da177e4 37#define DRIVERNAPI "-NAPI"
f731a9ef 38#define DRV_VERSION "1.0.135-k2" DRIVERNAPI
273dc74e 39const char ixgb_driver_version[] = DRV_VERSION;
f731a9ef 40static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation.";
1da177e4 41
d9fed18b
JB		 42#define IXGB_CB_LENGTH 256
43static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
44module_param(copybreak, uint, 0644);
45MODULE_PARM_DESC(copybreak,
46 "Maximum size of packet that is copied to a new buffer on receive");
47
1da177e4
LT		 48/* ixgb_pci_tbl - PCI Device ID Table
49 *
50 * Wildcard entries (PCI_ANY_ID) should come last
51 * Last entry must be all 0s
52 *
53 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
54 * Class, Class Mask, private data (not used) }
55 */
a3aa1884 56static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl) = {
61dc5334 57 {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX,
1da177e4 58 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
61dc5334 59 {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_CX4,
940829e2 60 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
61dc5334 61 {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_SR,
1da177e4 62 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
61dc5334 63 {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_LR,
1da177e4
LT		 64 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
65
66 /* required last entry */
67 {0,}
68};
69
70MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
71
72/* Local Function Prototypes */
1da177e4
LT		 73static int ixgb_init_module(void);
74static void ixgb_exit_module(void);
75static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
9f9a12f8 76static void ixgb_remove(struct pci_dev *pdev);
1da177e4
LT		 77static int ixgb_sw_init(struct ixgb_adapter *adapter);
78static int ixgb_open(struct net_device *netdev);
79static int ixgb_close(struct net_device *netdev);
80static void ixgb_configure_tx(struct ixgb_adapter *adapter);
81static void ixgb_configure_rx(struct ixgb_adapter *adapter);
82static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
83static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
84static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
85static void ixgb_set_multi(struct net_device *netdev);
86static void ixgb_watchdog(unsigned long data);
3b29a56d
SH		 87static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb,
88 struct net_device *netdev);
1da177e4
LT		 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
7490d71a
JB		 95static int ixgb_clean(struct napi_struct *, int);
96static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
fc2d14e3 97static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);
7490d71a 98
1da177e4 99static void ixgb_tx_timeout(struct net_device *dev);
c4028958 100static void ixgb_tx_timeout_task(struct work_struct *work);
7490d71a 101
ae54496f
ET		 102static void ixgb_vlan_strip_enable(struct ixgb_adapter *adapter);
103static void ixgb_vlan_strip_disable(struct ixgb_adapter *adapter);
80d5c368
PM		 104static int ixgb_vlan_rx_add_vid(struct net_device *netdev,
105 __be16 proto, u16 vid);
106static int ixgb_vlan_rx_kill_vid(struct net_device *netdev,
107 __be16 proto, u16 vid);
1da177e4
LT		 108static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
109
1da177e4
LT		 110#ifdef CONFIG_NET_POLL_CONTROLLER
111/* for netdump / net console */
112static void ixgb_netpoll(struct net_device *dev);
113#endif
114
01748fbb 115static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
7490d71a 116 enum pci_channel_state state);
01748fbb
LV		 117static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
118static void ixgb_io_resume (struct pci_dev *pdev);
1da177e4 119
3646f0e5 120static const struct pci_error_handlers ixgb_err_handler = {
01748fbb
LV		 121 .error_detected = ixgb_io_error_detected,
122 .slot_reset = ixgb_io_slot_reset,
123 .resume = ixgb_io_resume,
124};
125
1da177e4 126static struct pci_driver ixgb_driver = {
c2eba932 127 .name = ixgb_driver_name,
1da177e4 128 .id_table = ixgb_pci_tbl,
c2eba932 129 .probe = ixgb_probe,
9f9a12f8 130 .remove = ixgb_remove,
01748fbb 131 .err_handler = &ixgb_err_handler
1da177e4
LT		 132};
133
134MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
135MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
136MODULE_LICENSE("GPL");
01e5abc2 137MODULE_VERSION(DRV_VERSION);
1da177e4 138
b3f4d599 139#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
140static int debug = -1;
ec9c3f5d
AK		 141module_param(debug, int, 0);
142MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
143
1da177e4
LT		 144/**
145 * ixgb_init_module - Driver Registration Routine
146 *
147 * ixgb_init_module is the first routine called when the driver is
148 * loaded. All it does is register with the PCI subsystem.
149 **/
150
151static int __init
152ixgb_init_module(void)
153{
d328bc83
JP		 154 pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version);
155 pr_info("%s\n", ixgb_copyright);
1da177e4 156
29917620 157 return pci_register_driver(&ixgb_driver);
1da177e4
LT		 158}
159
160module_init(ixgb_init_module);
161
162/**
163 * ixgb_exit_module - Driver Exit Cleanup Routine
164 *
165 * ixgb_exit_module is called just before the driver is removed
166 * from memory.
167 **/
168
169static void __exit
170ixgb_exit_module(void)
171{
1da177e4
LT		 172 pci_unregister_driver(&ixgb_driver);
173}
174
175module_exit(ixgb_exit_module);
176
177/**
178 * ixgb_irq_disable - Mask off interrupt generation on the NIC
179 * @adapter: board private structure
180 **/
181
235949d1 182static void
1da177e4
LT		 183ixgb_irq_disable(struct ixgb_adapter *adapter)
184{
1da177e4
LT		 185 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
186 IXGB_WRITE_FLUSH(&adapter->hw);
187 synchronize_irq(adapter->pdev->irq);
188}
189
190/**
191 * ixgb_irq_enable - Enable default interrupt generation settings
192 * @adapter: board private structure
193 **/
194
235949d1 195static void
1da177e4
LT		 196ixgb_irq_enable(struct ixgb_adapter *adapter)
197{
9c61a9dc
JB		 198 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
199 IXGB_INT_TXDW | IXGB_INT_LSC;
61dc5334 200 if (adapter->hw.subsystem_vendor_id == PCI_VENDOR_ID_SUN)
9c61a9dc
JB		 201 val |= IXGB_INT_GPI0;
202 IXGB_WRITE_REG(&adapter->hw, IMS, val);
203 IXGB_WRITE_FLUSH(&adapter->hw);
1da177e4
LT		 204}
205
206int
207ixgb_up(struct ixgb_adapter *adapter)
208{
209 struct net_device *netdev = adapter->netdev;
fb136c07 210 int err, irq_flags = IRQF_SHARED;
1da177e4
LT		 211 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
212 struct ixgb_hw *hw = &adapter->hw;
213
214 /* hardware has been reset, we need to reload some things */
215
8556f0d1 216 ixgb_rar_set(hw, netdev->dev_addr, 0);
1da177e4
LT		 217 ixgb_set_multi(netdev);
218
219 ixgb_restore_vlan(adapter);
220
221 ixgb_configure_tx(adapter);
222 ixgb_setup_rctl(adapter);
223 ixgb_configure_rx(adapter);
fc2d14e3 224 ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));
1da177e4 225
e59d1696
AK		 226 /* disable interrupts and get the hardware into a known state */
227 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
228
fb136c07
AK		 229 /* only enable MSI if bus is in PCI-X mode */
230 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
231 err = pci_enable_msi(adapter->pdev);
232 if (!err) {
3db1cd5c 233 adapter->have_msi = true;
fb136c07
AK		 234 irq_flags = 0;
235 }
1da177e4
LT		 236 /* proceed to try to request regular interrupt */
237 }
1da177e4 238
a0607fd3 239 err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags,
fb136c07
AK		 240 netdev->name, netdev);
241 if (err) {
242 if (adapter->have_msi)
243 pci_disable_msi(adapter->pdev);
6909c66d
JP		 244 netif_err(adapter, probe, adapter->netdev,
245 "Unable to allocate interrupt Error: %d\n", err);
1da177e4 246 return err;
ec9c3f5d 247 }
1da177e4 248
03f83041 249 if ((hw->max_frame_size != max_frame) ||
1da177e4
LT		 250 (hw->max_frame_size !=
251 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
252
253 hw->max_frame_size = max_frame;
254
255 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
256
03f83041 257 if (hw->max_frame_size >
1da177e4 258 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
222441a6 259 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
1da177e4 260
03f83041 261 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
1da177e4
LT		 262 ctrl0 |= IXGB_CTRL0_JFE;
263 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
264 }
265 }
266 }
267
bab2bce7 268 clear_bit(__IXGB_DOWN, &adapter->flags);
1da177e4 269
bea3348e 270 napi_enable(&adapter->napi);
e59d1696
AK		 271 ixgb_irq_enable(adapter);
272
4cb9be7a
JB		 273 netif_wake_queue(netdev);
274
bab2bce7
JB		 275 mod_timer(&adapter->watchdog_timer, jiffies);
276
1da177e4
LT		 277 return 0;
278}
279
280void
446490ca 281ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
1da177e4
LT		 282{
283 struct net_device *netdev = adapter->netdev;
284
bab2bce7
JB		 285 /* prevent the interrupt handler from restarting watchdog */
286 set_bit(__IXGB_DOWN, &adapter->flags);
287
49d85c50 288 napi_disable(&adapter->napi);
bab2bce7 289 /* waiting for NAPI to complete can re-enable interrupts */
1da177e4
LT		 290 ixgb_irq_disable(adapter);
291 free_irq(adapter->pdev->irq, netdev);
fb136c07
AK		 292
293 if (adapter->have_msi)
1da177e4
LT		 294 pci_disable_msi(adapter->pdev);
295
03f83041 296 if (kill_watchdog)
1da177e4 297 del_timer_sync(&adapter->watchdog_timer);
49d85c50 298
1da177e4
LT		 299 adapter->link_speed = 0;
300 adapter->link_duplex = 0;
301 netif_carrier_off(netdev);
302 netif_stop_queue(netdev);
303
304 ixgb_reset(adapter);
305 ixgb_clean_tx_ring(adapter);
306 ixgb_clean_rx_ring(adapter);
307}
308
309void
310ixgb_reset(struct ixgb_adapter *adapter)
311{
3fd7131f 312 struct ixgb_hw *hw = &adapter->hw;
1da177e4 313
3fd7131f
MW		 314 ixgb_adapter_stop(hw);
315 if (!ixgb_init_hw(hw))
6909c66d 316 netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n");
3fd7131f
MW		 317
318 /* restore frame size information */
319 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
320 if (hw->max_frame_size >
321 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
322 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
323 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
324 ctrl0 |= IXGB_CTRL0_JFE;
325 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
326 }
327 }
1da177e4
LT		 328}
329
c8f44aff
MM		 330static netdev_features_t
331ixgb_fix_features(struct net_device *netdev, netdev_features_t features)
f04ea74e
MM		 332{
333 /*
334 * Tx VLAN insertion does not work per HW design when Rx stripping is
335 * disabled.
336 */
f646968f
PM		 337 if (!(features & NETIF_F_HW_VLAN_CTAG_RX))
338 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
f04ea74e
MM		 339
340 return features;
341}
342
d7ccb8c2 343static int
c8f44aff 344ixgb_set_features(struct net_device *netdev, netdev_features_t features)
d7ccb8c2
MM		 345{
346 struct ixgb_adapter *adapter = netdev_priv(netdev);
c8f44aff 347 netdev_features_t changed = features ^ netdev->features;
d7ccb8c2 348
f646968f 349 if (!(changed & (NETIF_F_RXCSUM|NETIF_F_HW_VLAN_CTAG_RX)))
d7ccb8c2
MM		 350 return 0;
351
352 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
353
354 if (netif_running(netdev)) {
355 ixgb_down(adapter, true);
356 ixgb_up(adapter);
357 ixgb_set_speed_duplex(netdev);
358 } else
359 ixgb_reset(adapter);
360
361 return 0;
362}
363
364
0edc3527
SH		 365static const struct net_device_ops ixgb_netdev_ops = {
366 .ndo_open = ixgb_open,
367 .ndo_stop = ixgb_close,
00829823 368 .ndo_start_xmit = ixgb_xmit_frame,
0edc3527 369 .ndo_get_stats = ixgb_get_stats,
afc4b13d 370 .ndo_set_rx_mode = ixgb_set_multi,
0edc3527
SH		 371 .ndo_validate_addr = eth_validate_addr,
372 .ndo_set_mac_address = ixgb_set_mac,
373 .ndo_change_mtu = ixgb_change_mtu,
374 .ndo_tx_timeout = ixgb_tx_timeout,
0edc3527
SH		 375 .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid,
376 .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid,
377#ifdef CONFIG_NET_POLL_CONTROLLER
378 .ndo_poll_controller = ixgb_netpoll,
379#endif
f04ea74e 380 .ndo_fix_features = ixgb_fix_features,
d7ccb8c2 381 .ndo_set_features = ixgb_set_features,
0edc3527
SH		 382};
383
1da177e4
LT		 384/**
385 * ixgb_probe - Device Initialization Routine
386 * @pdev: PCI device information struct
387 * @ent: entry in ixgb_pci_tbl
388 *
389 * Returns 0 on success, negative on failure
390 *
391 * ixgb_probe initializes an adapter identified by a pci_dev structure.
392 * The OS initialization, configuring of the adapter private structure,
393 * and a hardware reset occur.
394 **/
395
9f9a12f8 396static int
0060c072 397ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 398{
399 struct net_device *netdev = NULL;
400 struct ixgb_adapter *adapter;
401 static int cards_found = 0;
1da177e4
LT		 402 int pci_using_dac;
403 int i;
404 int err;
405
9e7bd330
JB		 406 err = pci_enable_device(pdev);
407 if (err)
1da177e4
LT		 408 return err;
409
47631f85
NN		 410 pci_using_dac = 0;
411 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
412 if (!err) {
413 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
414 if (!err)
415 pci_using_dac = 1;
1da177e4 416 } else {
47631f85
NN		 417 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
418 if (err) {
419 err = dma_set_coherent_mask(&pdev->dev,
420 DMA_BIT_MASK(32));
421 if (err) {
422 pr_err("No usable DMA configuration, aborting\n");
423 goto err_dma_mask;
424 }
1da177e4 425 }
1da177e4
LT		 426 }
427
9e7bd330
JB		 428 err = pci_request_regions(pdev, ixgb_driver_name);
429 if (err)
c91e468a 430 goto err_request_regions;
1da177e4
LT		 431
432 pci_set_master(pdev);
433
434 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
03f83041 435 if (!netdev) {
1da177e4
LT		 436 err = -ENOMEM;
437 goto err_alloc_etherdev;
438 }
439
1da177e4
LT		 440 SET_NETDEV_DEV(netdev, &pdev->dev);
441
442 pci_set_drvdata(pdev, netdev);
8908c6cd 443 adapter = netdev_priv(netdev);
1da177e4
LT		 444 adapter->netdev = netdev;
445 adapter->pdev = pdev;
446 adapter->hw.back = adapter;
b3f4d599 447 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1da177e4 448
275f165f 449 adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
e539e466 450 if (!adapter->hw.hw_addr) {
1da177e4
LT		 451 err = -EIO;
452 goto err_ioremap;
453 }
454
1459336d 455 for (i = BAR_1; i <= BAR_5; i++) {
03f83041 456 if (pci_resource_len(pdev, i) == 0)
1da177e4 457 continue;
03f83041 458 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 459 adapter->hw.io_base = pci_resource_start(pdev, i);
460 break;
461 }
462 }
463
0edc3527 464 netdev->netdev_ops = &ixgb_netdev_ops;
1da177e4 465 ixgb_set_ethtool_ops(netdev);
9b8118df 466 netdev->watchdog_timeo = 5 * HZ;
bea3348e 467 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4 468
0eb5a34c 469 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 470
471 adapter->bd_number = cards_found;
472 adapter->link_speed = 0;
473 adapter->link_duplex = 0;
474
475 /* setup the private structure */
476
9e7bd330
JB		 477 err = ixgb_sw_init(adapter);
478 if (err)
1da177e4
LT		 479 goto err_sw_init;
480
d7ccb8c2
MM		 481 netdev->hw_features = NETIF_F_SG |
482 NETIF_F_TSO |
f04ea74e 483 NETIF_F_HW_CSUM |
f646968f
PM		 484 NETIF_F_HW_VLAN_CTAG_TX |
485 NETIF_F_HW_VLAN_CTAG_RX;
f04ea74e 486 netdev->features = netdev->hw_features |
f646968f 487 NETIF_F_HW_VLAN_CTAG_FILTER;
d7ccb8c2 488 netdev->hw_features |= NETIF_F_RXCSUM;
1da177e4 489
7b872a55 490 if (pci_using_dac) {
1da177e4 491 netdev->features |= NETIF_F_HIGHDMA;
7b872a55
YZ		 492 netdev->vlan_features |= NETIF_F_HIGHDMA;
493 }
1da177e4
LT		 494
495 /* make sure the EEPROM is good */
496
03f83041 497 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
6909c66d
JP		 498 netif_err(adapter, probe, adapter->netdev,
499 "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 500 err = -EIO;
501 goto err_eeprom;
502 }
503
504 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
505
aaeb6cdf 506 if (!is_valid_ether_addr(netdev->dev_addr)) {
6909c66d 507 netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n");
1da177e4
LT		 508 err = -EIO;
509 goto err_eeprom;
510 }
511
512 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
513
514 init_timer(&adapter->watchdog_timer);
c061b18d 515 adapter->watchdog_timer.function = ixgb_watchdog;
1da177e4
LT		 516 adapter->watchdog_timer.data = (unsigned long)adapter;
517
c4028958 518 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 519
ec9c3f5d 520 strcpy(netdev->name, "eth%d");
9e7bd330
JB		 521 err = register_netdev(netdev);
522 if (err)
1da177e4
LT		 523 goto err_register;
524
3a6d1bc4 525 /* carrier off reporting is important to ethtool even BEFORE open */
1da177e4 526 netif_carrier_off(netdev);
1da177e4 527
6909c66d
JP		 528 netif_info(adapter, probe, adapter->netdev,
529 "Intel(R) PRO/10GbE Network Connection\n");
1da177e4
LT		 530 ixgb_check_options(adapter);
531 /* reset the hardware with the new settings */
532
533 ixgb_reset(adapter);
534
535 cards_found++;
536 return 0;
537
538err_register:
539err_sw_init:
540err_eeprom:
541 iounmap(adapter->hw.hw_addr);
542err_ioremap:
543 free_netdev(netdev);
544err_alloc_etherdev:
545 pci_release_regions(pdev);
c91e468a
AS		 546err_request_regions:
547err_dma_mask:
548 pci_disable_device(pdev);
1da177e4
LT		 549 return err;
550}
551
552/**
553 * ixgb_remove - Device Removal Routine
554 * @pdev: PCI device information struct
555 *
556 * ixgb_remove is called by the PCI subsystem to alert the driver
557 * that it should release a PCI device. The could be caused by a
558 * Hot-Plug event, or because the driver is going to be removed from
559 * memory.
560 **/
561
9f9a12f8 562static void
1da177e4
LT		 563ixgb_remove(struct pci_dev *pdev)
564{
565 struct net_device *netdev = pci_get_drvdata(pdev);
8908c6cd 566 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 567
23f333a2 568 cancel_work_sync(&adapter->tx_timeout_task);
12579697 569
1da177e4
LT		 570 unregister_netdev(netdev);
571
572 iounmap(adapter->hw.hw_addr);
573 pci_release_regions(pdev);
574
575 free_netdev(netdev);
ec43a81c 576 pci_disable_device(pdev);
1da177e4
LT		 577}
578
579/**
580 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
581 * @adapter: board private structure to initialize
582 *
583 * ixgb_sw_init initializes the Adapter private data structure.
584 * Fields are initialized based on PCI device information and
585 * OS network device settings (MTU size).
586 **/
587
9f9a12f8 588static int
1da177e4
LT		 589ixgb_sw_init(struct ixgb_adapter *adapter)
590{
591 struct ixgb_hw *hw = &adapter->hw;
592 struct net_device *netdev = adapter->netdev;
593 struct pci_dev *pdev = adapter->pdev;
594
595 /* PCI config space info */
596
597 hw->vendor_id = pdev->vendor;
598 hw->device_id = pdev->device;
599 hw->subsystem_vendor_id = pdev->subsystem_vendor;
600 hw->subsystem_id = pdev->subsystem_device;
601
1da177e4 602 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
a3dc3da0 603 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
1da177e4 604
6909c66d
JP		 605 if ((hw->device_id == IXGB_DEVICE_ID_82597EX) ||
606 (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) ||
607 (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) ||
608 (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
0060c072 609 hw->mac_type = ixgb_82597;
1da177e4
LT		 610 else {
611 /* should never have loaded on this device */
6909c66d 612 netif_err(adapter, probe, adapter->netdev, "unsupported device id\n");
1da177e4
LT		 613 }
614
615 /* enable flow control to be programmed */
616 hw->fc.send_xon = 1;
617
bab2bce7 618 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 619 return 0;
620}
621
622/**
623 * ixgb_open - Called when a network interface is made active
624 * @netdev: network interface device structure
625 *
626 * Returns 0 on success, negative value on failure
627 *
628 * The open entry point is called when a network interface is made
629 * active by the system (IFF_UP). At this point all resources needed
630 * for transmit and receive operations are allocated, the interrupt
631 * handler is registered with the OS, the watchdog timer is started,
632 * and the stack is notified that the interface is ready.
633 **/
634
635static int
636ixgb_open(struct net_device *netdev)
637{
8908c6cd 638 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 639 int err;
640
641 /* allocate transmit descriptors */
9e7bd330
JB		 642 err = ixgb_setup_tx_resources(adapter);
643 if (err)
1da177e4
LT		 644 goto err_setup_tx;
645
3a6d1bc4
JB		 646 netif_carrier_off(netdev);
647
1da177e4
LT		 648 /* allocate receive descriptors */
649
9e7bd330
JB		 650 err = ixgb_setup_rx_resources(adapter);
651 if (err)
1da177e4
LT		 652 goto err_setup_rx;
653
9e7bd330
JB		 654 err = ixgb_up(adapter);
655 if (err)
1da177e4
LT		 656 goto err_up;
657
3a6d1bc4
JB		 658 netif_start_queue(netdev);
659
1da177e4
LT		 660 return 0;
661
662err_up:
663 ixgb_free_rx_resources(adapter);
664err_setup_rx:
665 ixgb_free_tx_resources(adapter);
666err_setup_tx:
667 ixgb_reset(adapter);
668
669 return err;
670}
671
672/**
673 * ixgb_close - Disables a network interface
674 * @netdev: network interface device structure
675 *
676 * Returns 0, this is not allowed to fail
677 *
678 * The close entry point is called when an interface is de-activated
679 * by the OS. The hardware is still under the drivers control, but
680 * needs to be disabled. A global MAC reset is issued to stop the
681 * hardware, and all transmit and receive resources are freed.
682 **/
683
684static int
685ixgb_close(struct net_device *netdev)
686{
8908c6cd 687 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 688
446490ca 689 ixgb_down(adapter, true);
1da177e4
LT		 690
691 ixgb_free_tx_resources(adapter);
692 ixgb_free_rx_resources(adapter);
693
694 return 0;
695}
696
697/**
698 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
699 * @adapter: board private structure
700 *
701 * Return 0 on success, negative on failure
702 **/
703
704int
705ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
706{
707 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
708 struct pci_dev *pdev = adapter->pdev;
709 int size;
710
711 size = sizeof(struct ixgb_buffer) * txdr->count;
89bf67f1 712 txdr->buffer_info = vzalloc(size);
14f8dc49 713 if (!txdr->buffer_info)
1da177e4 714 return -ENOMEM;
1da177e4
LT		 715
716 /* round up to nearest 4K */
717
718 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 719 txdr->size = ALIGN(txdr->size, 4096);
1da177e4 720
47631f85 721 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1f9061d2 722 GFP_KERNEL | __GFP_ZERO);
03f83041 723 if (!txdr->desc) {
1da177e4
LT		 724 vfree(txdr->buffer_info);
725 return -ENOMEM;
726 }
1da177e4
LT		 727
728 txdr->next_to_use = 0;
729 txdr->next_to_clean = 0;
730
731 return 0;
732}
733
734/**
735 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
736 * @adapter: board private structure
737 *
738 * Configure the Tx unit of the MAC after a reset.
739 **/
740
741static void
742ixgb_configure_tx(struct ixgb_adapter *adapter)
743{
222441a6
JP		 744 u64 tdba = adapter->tx_ring.dma;
745 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
746 u32 tctl;
1da177e4
LT		 747 struct ixgb_hw *hw = &adapter->hw;
748
0060c072
JB		 749 /* Setup the Base and Length of the Tx Descriptor Ring
750 * tx_ring.dma can be either a 32 or 64 bit value
1da177e4
LT		 751 */
752
753 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
754 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
755
756 IXGB_WRITE_REG(hw, TDLEN, tdlen);
757
758 /* Setup the HW Tx Head and Tail descriptor pointers */
759
760 IXGB_WRITE_REG(hw, TDH, 0);
761 IXGB_WRITE_REG(hw, TDT, 0);
762
763 /* don't set up txdctl, it induces performance problems if configured
764 * incorrectly */
765 /* Set the Tx Interrupt Delay register */
766
767 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
768
769 /* Program the Transmit Control Register */
770
771 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
772 IXGB_WRITE_REG(hw, TCTL, tctl);
773
774 /* Setup Transmit Descriptor Settings for this adapter */
775 adapter->tx_cmd_type =
0060c072
JB		 776 IXGB_TX_DESC_TYPE |
777 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
1da177e4
LT		 778}
779
780/**
781 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
782 * @adapter: board private structure
783 *
784 * Returns 0 on success, negative on failure
785 **/
786
787int
788ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
789{
790 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
791 struct pci_dev *pdev = adapter->pdev;
792 int size;
793
794 size = sizeof(struct ixgb_buffer) * rxdr->count;
89bf67f1 795 rxdr->buffer_info = vzalloc(size);
14f8dc49 796 if (!rxdr->buffer_info)
1da177e4 797 return -ENOMEM;
1da177e4
LT		 798
799 /* Round up to nearest 4K */
800
801 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 802 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4 803
47631f85
NN		 804 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
805 GFP_KERNEL);
1da177e4 806
03f83041 807 if (!rxdr->desc) {
1da177e4
LT		 808 vfree(rxdr->buffer_info);
809 return -ENOMEM;
810 }
811 memset(rxdr->desc, 0, rxdr->size);
812
813 rxdr->next_to_clean = 0;
814 rxdr->next_to_use = 0;
815
816 return 0;
817}
818
819/**
820 * ixgb_setup_rctl - configure the receive control register
821 * @adapter: Board private structure
822 **/
823
824static void
825ixgb_setup_rctl(struct ixgb_adapter *adapter)
826{
222441a6 827 u32 rctl;
1da177e4
LT		 828
829 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
830
831 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
832
833 rctl |=
0060c072
JB		 834 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
835 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
1da177e4
LT		 836 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
837
838 rctl |= IXGB_RCTL_SECRC;
839
3f3dc0dd 840 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 841 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 842 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 843 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 844 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 845 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 846 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 847 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 848
849 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
850}
851
852/**
853 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
854 * @adapter: board private structure
855 *
856 * Configure the Rx unit of the MAC after a reset.
857 **/
858
859static void
860ixgb_configure_rx(struct ixgb_adapter *adapter)
861{
222441a6
JP		 862 u64 rdba = adapter->rx_ring.dma;
863 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 864 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 865 u32 rctl;
866 u32 rxcsum;
1da177e4
LT		 867
868 /* make sure receives are disabled while setting up the descriptors */
869
870 rctl = IXGB_READ_REG(hw, RCTL);
871 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
872
873 /* set the Receive Delay Timer Register */
874
875 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
876
877 /* Setup the Base and Length of the Rx Descriptor Ring */
878
879 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
880 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
881
882 IXGB_WRITE_REG(hw, RDLEN, rdlen);
883
884 /* Setup the HW Rx Head and Tail Descriptor Pointers */
885 IXGB_WRITE_REG(hw, RDH, 0);
886 IXGB_WRITE_REG(hw, RDT, 0);
887
4360386f
JB		 888 /* due to the hardware errata with RXDCTL, we are unable to use any of
889 * the performance enhancing features of it without causing other
890 * subtle bugs, some of the bugs could include receive length
891 * corruption at high data rates (WTHRESH > 0) and/or receive
892 * descriptor ring irregularites (particularly in hardware cache) */
893 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 894
895 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 896 if (adapter->rx_csum) {
1da177e4
LT		 897 rxcsum = IXGB_READ_REG(hw, RXCSUM);
898 rxcsum |= IXGB_RXCSUM_TUOFL;
899 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
900 }
901
902 /* Enable Receives */
903
904 IXGB_WRITE_REG(hw, RCTL, rctl);
905}
906
907/**
908 * ixgb_free_tx_resources - Free Tx Resources
909 * @adapter: board private structure
910 *
911 * Free all transmit software resources
912 **/
913
914void
915ixgb_free_tx_resources(struct ixgb_adapter *adapter)
916{
917 struct pci_dev *pdev = adapter->pdev;
918
919 ixgb_clean_tx_ring(adapter);
920
921 vfree(adapter->tx_ring.buffer_info);
922 adapter->tx_ring.buffer_info = NULL;
923
47631f85
NN		 924 dma_free_coherent(&pdev->dev, adapter->tx_ring.size,
925 adapter->tx_ring.desc, adapter->tx_ring.dma);
1da177e4
LT		 926
927 adapter->tx_ring.desc = NULL;
928}
929
235949d1 930static void
1da177e4 931ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
0060c072 932 struct ixgb_buffer *buffer_info)
1da177e4 933{
adeaa908
AD		 934 if (buffer_info->dma) {
935 if (buffer_info->mapped_as_page)
47631f85
NN		 936 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
937 buffer_info->length, DMA_TO_DEVICE);
adeaa908 938 else
47631f85
NN		 939 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
940 buffer_info->length, DMA_TO_DEVICE);
adeaa908
AD		 941 buffer_info->dma = 0;
942 }
943
fe52eeb8 944 if (buffer_info->skb) {
fe52eeb8
AD		 945 dev_kfree_skb_any(buffer_info->skb);
946 buffer_info->skb = NULL;
947 }
1dfdd7df
AK		 948 buffer_info->time_stamp = 0;
949 /* these fields must always be initialized in tx
950 * buffer_info->length = 0;
951 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 952}
953
954/**
955 * ixgb_clean_tx_ring - Free Tx Buffers
956 * @adapter: board private structure
957 **/
958
959static void
960ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
961{
962 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
963 struct ixgb_buffer *buffer_info;
964 unsigned long size;
965 unsigned int i;
966
967 /* Free all the Tx ring sk_buffs */
968
1459336d 969 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 970 buffer_info = &tx_ring->buffer_info[i];
971 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
972 }
973
974 size = sizeof(struct ixgb_buffer) * tx_ring->count;
975 memset(tx_ring->buffer_info, 0, size);
976
977 /* Zero out the descriptor ring */
978
979 memset(tx_ring->desc, 0, tx_ring->size);
980
981 tx_ring->next_to_use = 0;
982 tx_ring->next_to_clean = 0;
983
984 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
985 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
986}
987
988/**
989 * ixgb_free_rx_resources - Free Rx Resources
990 * @adapter: board private structure
991 *
992 * Free all receive software resources
993 **/
994
995void
996ixgb_free_rx_resources(struct ixgb_adapter *adapter)
997{
998 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
999 struct pci_dev *pdev = adapter->pdev;
1000
1001 ixgb_clean_rx_ring(adapter);
1002
1003 vfree(rx_ring->buffer_info);
1004 rx_ring->buffer_info = NULL;
1005
47631f85
NN		 1006 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1007 rx_ring->dma);
1da177e4
LT		 1008
1009 rx_ring->desc = NULL;
1010}
1011
1012/**
1013 * ixgb_clean_rx_ring - Free Rx Buffers
1014 * @adapter: board private structure
1015 **/
1016
1017static void
1018ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
1019{
1020 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1021 struct ixgb_buffer *buffer_info;
1022 struct pci_dev *pdev = adapter->pdev;
1023 unsigned long size;
1024 unsigned int i;
1025
1026 /* Free all the Rx ring sk_buffs */
1027
1459336d 1028 for (i = 0; i < rx_ring->count; i++) {
1da177e4 1029 buffer_info = &rx_ring->buffer_info[i];
23e55a32 1030 if (buffer_info->dma) {
47631f85 1031 dma_unmap_single(&pdev->dev,
1da177e4
LT		 1032 buffer_info->dma,
1033 buffer_info->length,
47631f85 1034 DMA_FROM_DEVICE);
23e55a32
BJ		 1035 buffer_info->dma = 0;
1036 buffer_info->length = 0;
1037 }
1da177e4 1038
23e55a32 1039 if (buffer_info->skb) {
1da177e4 1040 dev_kfree_skb(buffer_info->skb);
1da177e4
LT		 1041 buffer_info->skb = NULL;
1042 }
1043 }
1044
1045 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1046 memset(rx_ring->buffer_info, 0, size);
1047
1048 /* Zero out the descriptor ring */
1049
1050 memset(rx_ring->desc, 0, rx_ring->size);
1051
1052 rx_ring->next_to_clean = 0;
1053 rx_ring->next_to_use = 0;
1054
1055 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1056 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1057}
1058
1059/**
1060 * ixgb_set_mac - Change the Ethernet Address of the NIC
1061 * @netdev: network interface device structure
1062 * @p: pointer to an address structure
1063 *
1064 * Returns 0 on success, negative on failure
1065 **/
1066
1067static int
1068ixgb_set_mac(struct net_device *netdev, void *p)
1069{
8908c6cd 1070 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1071 struct sockaddr *addr = p;
1072
03f83041 1073 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1074 return -EADDRNOTAVAIL;
1075
1076 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1077
1078 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1079
1080 return 0;
1081}
1082
1083/**
1084 * ixgb_set_multi - Multicast and Promiscuous mode set
1085 * @netdev: network interface device structure
1086 *
1087 * The set_multi entry point is called whenever the multicast address
1088 * list or the network interface flags are updated. This routine is
1089 * responsible for configuring the hardware for proper multicast,
1090 * promiscuous mode, and all-multi behavior.
1091 **/
1092
1093static void
1094ixgb_set_multi(struct net_device *netdev)
1095{
8908c6cd 1096 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1097 struct ixgb_hw *hw = &adapter->hw;
22bedad3 1098 struct netdev_hw_addr *ha;
222441a6 1099 u32 rctl;
1da177e4
LT		 1100
1101 /* Check for Promiscuous and All Multicast modes */
1102
1103 rctl = IXGB_READ_REG(hw, RCTL);
1104
03f83041 1105 if (netdev->flags & IFF_PROMISC) {
1da177e4 1106 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
ae54496f
ET		 1107 /* disable VLAN filtering */
1108 rctl &= ~IXGB_RCTL_CFIEN;
746b9f02 1109 rctl &= ~IXGB_RCTL_VFE;
1da177e4 1110 } else {
746b9f02
PM		 1111 if (netdev->flags & IFF_ALLMULTI) {
1112 rctl |= IXGB_RCTL_MPE;
1113 rctl &= ~IXGB_RCTL_UPE;
1114 } else {
1115 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1116 }
ae54496f 1117 /* enable VLAN filtering */
78ed11a5 1118 rctl |= IXGB_RCTL_VFE;
ae54496f 1119 rctl &= ~IXGB_RCTL_CFIEN;
1da177e4
LT		 1120 }
1121
4cd24eaf 1122 if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1123 rctl |= IXGB_RCTL_MPE;
1124 IXGB_WRITE_REG(hw, RCTL, rctl);
1125 } else {
ac5ac789
JB		 1126 u8 *mta = kmalloc(IXGB_MAX_NUM_MULTICAST_ADDRESSES *
1127 ETH_ALEN, GFP_ATOMIC);
1128 u8 *addr;
e404decb 1129 if (!mta)
ac5ac789 1130 goto alloc_failed;
1da177e4
LT		 1131
1132 IXGB_WRITE_REG(hw, RCTL, rctl);
1133
ac5ac789
JB		 1134 addr = mta;
1135 netdev_for_each_mc_addr(ha, netdev) {
1136 memcpy(addr, ha->addr, ETH_ALEN);
1137 addr += ETH_ALEN;
1138 }
1da177e4 1139
4cd24eaf 1140 ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0);
ac5ac789 1141 kfree(mta);
1da177e4 1142 }
ae54496f 1143
ac5ac789 1144alloc_failed:
f646968f 1145 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
ae54496f
ET		 1146 ixgb_vlan_strip_enable(adapter);
1147 else
1148 ixgb_vlan_strip_disable(adapter);
1149
1da177e4
LT		 1150}
1151
1152/**
1153 * ixgb_watchdog - Timer Call-back
1154 * @data: pointer to netdev cast into an unsigned long
1155 **/
1156
1157static void
1158ixgb_watchdog(unsigned long data)
1159{
1160 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1161 struct net_device *netdev = adapter->netdev;
1162 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1163
1164 ixgb_check_for_link(&adapter->hw);
1165
1166 if (ixgb_check_for_bad_link(&adapter->hw)) {
1167 /* force the reset path */
1168 netif_stop_queue(netdev);
1169 }
1170
03f83041
JB		 1171 if (adapter->hw.link_up) {
1172 if (!netif_carrier_ok(netdev)) {
d328bc83
JP		 1173 netdev_info(netdev,
1174 "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
1175 (adapter->hw.fc.type == ixgb_fc_full) ?
1176 "RX/TX" :
1177 (adapter->hw.fc.type == ixgb_fc_rx_pause) ?
1178 "RX" :
1179 (adapter->hw.fc.type == ixgb_fc_tx_pause) ?
1180 "TX" : "None");
1da177e4
LT		 1181 adapter->link_speed = 10000;
1182 adapter->link_duplex = FULL_DUPLEX;
1183 netif_carrier_on(netdev);
1da177e4
LT		 1184 }
1185 } else {
03f83041 1186 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1187 adapter->link_speed = 0;
1188 adapter->link_duplex = 0;
d328bc83 1189 netdev_info(netdev, "NIC Link is Down\n");
1da177e4 1190 netif_carrier_off(netdev);
1da177e4
LT		 1191 }
1192 }
1193
1194 ixgb_update_stats(adapter);
1195
03f83041
JB		 1196 if (!netif_carrier_ok(netdev)) {
1197 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1198 /* We've lost link, so the controller stops DMA,
1199 * but we've got queued Tx work that's never going
1200 * to get done, so reset controller to flush Tx.
1201 * (Do the reset outside of interrupt context). */
1202 schedule_work(&adapter->tx_timeout_task);
c2d5ab49
JB		 1203 /* return immediately since reset is imminent */
1204 return;
1da177e4
LT		 1205 }
1206 }
1207
1208 /* Force detection of hung controller every watchdog period */
446490ca 1209 adapter->detect_tx_hung = true;
1da177e4
LT		 1210
1211 /* generate an interrupt to force clean up of any stragglers */
1212 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1213
1214 /* Reset the timer */
1215 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1216}
1217
1218#define IXGB_TX_FLAGS_CSUM 0x00000001
1219#define IXGB_TX_FLAGS_VLAN 0x00000002
1220#define IXGB_TX_FLAGS_TSO 0x00000004
1221
235949d1 1222static int
1da177e4
LT		 1223ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1224{
1da177e4
LT		 1225 struct ixgb_context_desc *context_desc;
1226 unsigned int i;
222441a6
JP		 1227 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1228 u16 ipcse, tucse, mss;
1da177e4
LT		 1229 int err;
1230
89114afd 1231 if (likely(skb_is_gso(skb))) {
adc54139 1232 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1233 struct iphdr *iph;
1234
1da177e4
LT		 1235 if (skb_header_cloned(skb)) {
1236 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1237 if (err)
1238 return err;
1239 }
1240
ab6a5bb6 1241 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1242 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1243 iph = ip_hdr(skb);
1244 iph->tot_len = 0;
1245 iph->check = 0;
aa8223c7
ACM		 1246 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1247 iph->daddr, 0,
1248 IPPROTO_TCP, 0);
bbe735e4 1249 ipcss = skb_network_offset(skb);
eddc9ec5 1250 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1251 ipcse = skb_transport_offset(skb) - 1;
1252 tucss = skb_transport_offset(skb);
aa8223c7 1253 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1254 tucse = 0;
1255
1256 i = adapter->tx_ring.next_to_use;
1257 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1258 buffer_info = &adapter->tx_ring.buffer_info[i];
1259 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1260
1261 context_desc->ipcss = ipcss;
1262 context_desc->ipcso = ipcso;
1263 context_desc->ipcse = cpu_to_le16(ipcse);
1264 context_desc->tucss = tucss;
1265 context_desc->tucso = tucso;
1266 context_desc->tucse = cpu_to_le16(tucse);
1267 context_desc->mss = cpu_to_le16(mss);
1268 context_desc->hdr_len = hdr_len;
1269 context_desc->status = 0;
1270 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1271 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1272 | IXGB_CONTEXT_DESC_CMD_TSE
1273 | IXGB_CONTEXT_DESC_CMD_IP
1274 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1275 | IXGB_CONTEXT_DESC_CMD_IDE
1276 | (skb->len - (hdr_len)));
1277
06c2f9ec 1278
03f83041 1279 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1280 adapter->tx_ring.next_to_use = i;
1281
1282 return 1;
1283 }
1da177e4
LT		 1284
1285 return 0;
1286}
1287
446490ca 1288static bool
1da177e4
LT		 1289ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1290{
1291 struct ixgb_context_desc *context_desc;
1292 unsigned int i;
222441a6 1293 u8 css, cso;
1da177e4 1294
03f83041 1295 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1296 struct ixgb_buffer *buffer_info;
0d0b1672 1297 css = skb_checksum_start_offset(skb);
ff1dcadb 1298 cso = css + skb->csum_offset;
1da177e4
LT		 1299
1300 i = adapter->tx_ring.next_to_use;
1301 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1302 buffer_info = &adapter->tx_ring.buffer_info[i];
1303 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1304
1305 context_desc->tucss = css;
1306 context_desc->tucso = cso;
1307 context_desc->tucse = 0;
1308 /* zero out any previously existing data in one instruction */
222441a6 1309 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1310 context_desc->status = 0;
1311 context_desc->hdr_len = 0;
1312 context_desc->mss = 0;
1313 context_desc->cmd_type_len =
1314 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1315 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1316
03f83041 1317 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1318 adapter->tx_ring.next_to_use = i;
1319
446490ca 1320 return true;
1da177e4
LT		 1321 }
1322
446490ca 1323 return false;
1da177e4
LT		 1324}
1325
1326#define IXGB_MAX_TXD_PWR 14
1327#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1328
235949d1 1329static int
1da177e4
LT		 1330ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1331 unsigned int first)
1332{
1333 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
adeaa908 1334 struct pci_dev *pdev = adapter->pdev;
1da177e4 1335 struct ixgb_buffer *buffer_info;
fe52eeb8 1336 int len = skb_headlen(skb);
1da177e4 1337 unsigned int offset = 0, size, count = 0, i;
5d927853 1338 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1339 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1340 unsigned int f;
1da177e4
LT		 1341
1342 i = tx_ring->next_to_use;
1343
9a432992 1344 while (len) {
1da177e4 1345 buffer_info = &tx_ring->buffer_info[i];
709cf018 1346 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1347 /* Workaround for premature desc write-backs
1348 * in TSO mode. Append 4-byte sentinel desc */
1349 if (unlikely(mss && !nr_frags && size == len && size > 8))
1350 size -= 4;
1351
1da177e4 1352 buffer_info->length = size;
adc54139 1353 WARN_ON(buffer_info->dma != 0);
34336635 1354 buffer_info->time_stamp = jiffies;
adeaa908 1355 buffer_info->mapped_as_page = false;
47631f85
NN		 1356 buffer_info->dma = dma_map_single(&pdev->dev,
1357 skb->data + offset,
1358 size, DMA_TO_DEVICE);
1359 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
adeaa908 1360 goto dma_error;
1dfdd7df 1361 buffer_info->next_to_watch = 0;
1da177e4
LT		 1362
1363 len -= size;
1364 offset += size;
1365 count++;
fe52eeb8
AD		 1366 if (len) {
1367 i++;
1368 if (i == tx_ring->count)
1369 i = 0;
1370 }
1da177e4
LT		 1371 }
1372
1459336d 1373 for (f = 0; f < nr_frags; f++) {
9e903e08 1374 const struct skb_frag_struct *frag;
1da177e4
LT		 1375
1376 frag = &skb_shinfo(skb)->frags[f];
9e903e08 1377 len = skb_frag_size(frag);
877749bf 1378 offset = 0;
1da177e4 1379
9a432992 1380 while (len) {
fe52eeb8
AD		 1381 i++;
1382 if (i == tx_ring->count)
1383 i = 0;
1384
1da177e4 1385 buffer_info = &tx_ring->buffer_info[i];
709cf018 1386 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1387
1388 /* Workaround for premature desc write-backs
1389 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1390 if (unlikely(mss && (f == (nr_frags - 1))
1391 && size == len && size > 8))
5d927853
JB		 1392 size -= 4;
1393
1da177e4 1394 buffer_info->length = size;
34336635 1395 buffer_info->time_stamp = jiffies;
adeaa908
AD		 1396 buffer_info->mapped_as_page = true;
1397 buffer_info->dma =
877749bf
IC		 1398 skb_frag_dma_map(&pdev->dev, frag, offset, size,
1399 DMA_TO_DEVICE);
47631f85 1400 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
adeaa908 1401 goto dma_error;
1dfdd7df 1402 buffer_info->next_to_watch = 0;
1da177e4
LT		 1403
1404 len -= size;
1405 offset += size;
1406 count++;
1da177e4
LT		 1407 }
1408 }
1da177e4
LT		 1409 tx_ring->buffer_info[i].skb = skb;
1410 tx_ring->buffer_info[first].next_to_watch = i;
1411
1412 return count;
adeaa908
AD		 1413
1414dma_error:
1415 dev_err(&pdev->dev, "TX DMA map failed\n");
1416 buffer_info->dma = 0;
c1fa347f 1417 if (count)
adeaa908 1418 count--;
c1fa347f
RK		 1419
1420 while (count--) {
1421 if (i==0)
adeaa908 1422 i += tx_ring->count;
c1fa347f 1423 i--;
adeaa908
AD		 1424 buffer_info = &tx_ring->buffer_info[i];
1425 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1426 }
1427
1428 return 0;
1da177e4
LT		 1429}
1430
235949d1 1431static void
1da177e4
LT		 1432ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1433{
1434 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1435 struct ixgb_tx_desc *tx_desc = NULL;
1436 struct ixgb_buffer *buffer_info;
222441a6
JP		 1437 u32 cmd_type_len = adapter->tx_cmd_type;
1438 u8 status = 0;
1439 u8 popts = 0;
1da177e4
LT		 1440 unsigned int i;
1441
03f83041 1442 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1443 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1444 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1445 }
1446
03f83041 1447 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1448 popts |= IXGB_TX_DESC_POPTS_TXSM;
1449
03f83041 1450 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1451 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1452
1453 i = tx_ring->next_to_use;
1454
9a432992 1455 while (count--) {
1da177e4
LT		 1456 buffer_info = &tx_ring->buffer_info[i];
1457 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1458 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1459 tx_desc->cmd_type_len =
1460 cpu_to_le32(cmd_type_len | buffer_info->length);
1461 tx_desc->status = status;
1462 tx_desc->popts = popts;
1463 tx_desc->vlan = cpu_to_le16(vlan_id);
1464
03f83041 1465 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1466 }
1467
0060c072
JB		 1468 tx_desc->cmd_type_len |=
1469 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1470
1471 /* Force memory writes to complete before letting h/w
1472 * know there are new descriptors to fetch. (Only
1473 * applicable for weak-ordered memory model archs,
1474 * such as IA-64). */
1475 wmb();
1476
1477 tx_ring->next_to_use = i;
1478 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1479}
1480
dfd341e4
JB		 1481static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1482{
1483 struct ixgb_adapter *adapter = netdev_priv(netdev);
1484 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1485
1486 netif_stop_queue(netdev);
1487 /* Herbert's original patch had:
1488 * smp_mb__after_netif_stop_queue();
1489 * but since that doesn't exist yet, just open code it. */
1490 smp_mb();
1491
1492 /* We need to check again in a case another CPU has just
1493 * made room available. */
1494 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1495 return -EBUSY;
1496
1497 /* A reprieve! */
1498 netif_start_queue(netdev);
1499 ++adapter->restart_queue;
1500 return 0;
1501}
1502
1503static int ixgb_maybe_stop_tx(struct net_device *netdev,
1504 struct ixgb_desc_ring *tx_ring, int size)
1505{
1506 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1507 return 0;
1508 return __ixgb_maybe_stop_tx(netdev, size);
1509}
1510
1511
1da177e4
LT		 1512/* Tx Descriptors needed, worst case */
1513#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1514 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1515#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1516 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1517 + 1 /* one more needed for sentinel TSO workaround */
1da177e4 1518
3b29a56d 1519static netdev_tx_t
1da177e4
LT		 1520ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1521{
8908c6cd 1522 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1523 unsigned int first;
1524 unsigned int tx_flags = 0;
1da177e4 1525 int vlan_id = 0;
fe52eeb8 1526 int count = 0;
1da177e4
LT		 1527 int tso;
1528
bab2bce7 1529 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
97aa2540 1530 dev_kfree_skb_any(skb);
bab2bce7
JB		 1531 return NETDEV_TX_OK;
1532 }
1533
03f83041 1534 if (skb->len <= 0) {
97aa2540 1535 dev_kfree_skb_any(skb);
6ed10654 1536 return NETDEV_TX_OK;
1da177e4
LT		 1537 }
1538
dfd341e4 1539 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1540 DESC_NEEDED)))
f017f14b 1541 return NETDEV_TX_BUSY;
1da177e4 1542
e2444d92 1543 if (vlan_tx_tag_present(skb)) {
1da177e4
LT		 1544 tx_flags |= IXGB_TX_FLAGS_VLAN;
1545 vlan_id = vlan_tx_tag_get(skb);
1546 }
1547
1548 first = adapter->tx_ring.next_to_use;
0060c072 1549
1da177e4
LT		 1550 tso = ixgb_tso(adapter, skb);
1551 if (tso < 0) {
97aa2540 1552 dev_kfree_skb_any(skb);
1da177e4
LT		 1553 return NETDEV_TX_OK;
1554 }
1555
96f9c2e2 1556 if (likely(tso))
1da177e4 1557 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1558 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1559 tx_flags |= IXGB_TX_FLAGS_CSUM;
1560
fe52eeb8 1561 count = ixgb_tx_map(adapter, skb, first);
1da177e4 1562
fe52eeb8
AD		 1563 if (count) {
1564 ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
fe52eeb8
AD		 1565 /* Make sure there is space in the ring for the next send. */
1566 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1da177e4 1567
fe52eeb8
AD		 1568 } else {
1569 dev_kfree_skb_any(skb);
1570 adapter->tx_ring.buffer_info[first].time_stamp = 0;
1571 adapter->tx_ring.next_to_use = first;
1572 }
f017f14b 1573
f017f14b 1574 return NETDEV_TX_OK;
1da177e4
LT		 1575}
1576
1577/**
1578 * ixgb_tx_timeout - Respond to a Tx Hang
1579 * @netdev: network interface device structure
1580 **/
1581
1582static void
1583ixgb_tx_timeout(struct net_device *netdev)
1584{
8908c6cd 1585 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1586
1587 /* Do the reset outside of interrupt context */
1588 schedule_work(&adapter->tx_timeout_task);
1589}
1590
1591static void
c4028958 1592ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1593{
c4028958
DH		 1594 struct ixgb_adapter *adapter =
1595 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1596
9b8118df 1597 adapter->tx_timeout_count++;
446490ca 1598 ixgb_down(adapter, true);
1da177e4
LT		 1599 ixgb_up(adapter);
1600}
1601
1602/**
1603 * ixgb_get_stats - Get System Network Statistics
1604 * @netdev: network interface device structure
1605 *
1606 * Returns the address of the device statistics structure.
1607 * The statistics are actually updated from the timer callback.
1608 **/
1609
1610static struct net_device_stats *
1611ixgb_get_stats(struct net_device *netdev)
1612{
0cdc0369 1613 return &netdev->stats;
1da177e4
LT		 1614}
1615
1616/**
1617 * ixgb_change_mtu - Change the Maximum Transfer Unit
1618 * @netdev: network interface device structure
1619 * @new_mtu: new value for maximum frame size
1620 *
1621 * Returns 0 on success, negative on failure
1622 **/
1623
1624static int
1625ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1626{
8908c6cd 1627 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1628 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1629 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1630
a65a604a
JB		 1631 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1632 if ((new_mtu < 68) ||
1633 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
6909c66d
JP		 1634 netif_err(adapter, probe, adapter->netdev,
1635 "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1636 return -EINVAL;
1637 }
1638
b5ca88eb
JB		 1639 if (old_max_frame == max_frame)
1640 return 0;
1641
1642 if (netif_running(netdev))
1643 ixgb_down(adapter, true);
1644
a3dc3da0 1645 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1646
1647 netdev->mtu = new_mtu;
1648
b5ca88eb 1649 if (netif_running(netdev))
1da177e4 1650 ixgb_up(adapter);
1da177e4
LT		 1651
1652 return 0;
1653}
1654
1655/**
1656 * ixgb_update_stats - Update the board statistics counters.
1657 * @adapter: board private structure
1658 **/
1659
1660void
1661ixgb_update_stats(struct ixgb_adapter *adapter)
1662{
5633684d 1663 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1664 struct pci_dev *pdev = adapter->pdev;
1665
1666 /* Prevent stats update while adapter is being reset */
81b1955e 1667 if (pci_channel_offline(pdev))
01748fbb 1668 return;
5633684d 1669
03f83041 1670 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
4cd24eaf 1671 (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
5633684d
MC		 1672 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1673 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1674 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1675 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1676
1677 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1678 /* fix up multicast stats by removing broadcasts */
03f83041 1679 if (multi >= bcast)
7b89178d 1680 multi -= bcast;
0060c072 1681
5633684d
MC		 1682 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1683 adapter->stats.mprch += (multi >> 32);
0060c072 1684 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1685 adapter->stats.bprch += bcast_h;
1686 } else {
1687 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1688 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1689 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1690 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1691 }
1da177e4
LT		 1692 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1693 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1694 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1695 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1696 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1697 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1698 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1699 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1700 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1701 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1702 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1703 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1704 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1705 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1706 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1707 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1708 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1709 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1710 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1711 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1712 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1713 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1714 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1715 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1716 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1717 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1718 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1719 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1720 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1721 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1722 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1723 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1724 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1725 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1726 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1727 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1728 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1729 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1730 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1731 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1732 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1733 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1734 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1735 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1736 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1737 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1738 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1739 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1740 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1741 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1742 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1743 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1744 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1745 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1746 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1747 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1748
1749 /* Fill out the OS statistics structure */
1750
0cdc0369
AK		 1751 netdev->stats.rx_packets = adapter->stats.gprcl;
1752 netdev->stats.tx_packets = adapter->stats.gptcl;
1753 netdev->stats.rx_bytes = adapter->stats.gorcl;
1754 netdev->stats.tx_bytes = adapter->stats.gotcl;
1755 netdev->stats.multicast = adapter->stats.mprcl;
1756 netdev->stats.collisions = 0;
1da177e4
LT		 1757
1758 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1759 * with a length in the type/len field */
0cdc0369 1760 netdev->stats.rx_errors =
1da177e4
LT		 1761 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1762 adapter->stats.ruc +
1763 adapter->stats.roc /*+ adapter->stats.rlec */ +
1764 adapter->stats.icbc +
1765 adapter->stats.ecbc + adapter->stats.mpc;
1766
1da177e4 1767 /* see above
0cdc0369 1768 * netdev->stats.rx_length_errors = adapter->stats.rlec;
1da177e4
LT		 1769 */
1770
0cdc0369
AK		 1771 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
1772 netdev->stats.rx_fifo_errors = adapter->stats.mpc;
1773 netdev->stats.rx_missed_errors = adapter->stats.mpc;
1774 netdev->stats.rx_over_errors = adapter->stats.mpc;
1775
1776 netdev->stats.tx_errors = 0;
1777 netdev->stats.rx_frame_errors = 0;
1778 netdev->stats.tx_aborted_errors = 0;
1779 netdev->stats.tx_carrier_errors = 0;
1780 netdev->stats.tx_fifo_errors = 0;
1781 netdev->stats.tx_heartbeat_errors = 0;
1782 netdev->stats.tx_window_errors = 0;
1da177e4
LT		 1783}
1784
1785#define IXGB_MAX_INTR 10
1786/**
1787 * ixgb_intr - Interrupt Handler
1788 * @irq: interrupt number
1789 * @data: pointer to a network interface device structure
1da177e4
LT		 1790 **/
1791
1792static irqreturn_t
7d12e780 1793ixgb_intr(int irq, void *data)
1da177e4
LT		 1794{
1795 struct net_device *netdev = data;
8908c6cd 1796 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1797 struct ixgb_hw *hw = &adapter->hw;
222441a6 1798 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4 1799
03f83041 1800 if (unlikely(!icr))
1da177e4
LT		 1801 return IRQ_NONE; /* Not our interrupt */
1802
bab2bce7
JB		 1803 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1804 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1805 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4 1806
288379f0 1807 if (napi_schedule_prep(&adapter->napi)) {
1da177e4 1808
0060c072 1809 /* Disable interrupts and register for poll. The flush
1da177e4
LT		 1810 of the posted write is intentionally left out.
1811 */
1812
1da177e4 1813 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
288379f0 1814 __napi_schedule(&adapter->napi);
1da177e4 1815 }
1da177e4
LT		 1816 return IRQ_HANDLED;
1817}
1818
1da177e4
LT		 1819/**
1820 * ixgb_clean - NAPI Rx polling callback
1821 * @adapter: board private structure
1822 **/
1823
1824static int
bea3348e 1825ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1826{
bea3348e 1827 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1da177e4
LT		 1828 int work_done = 0;
1829
53e52c72 1830 ixgb_clean_tx_irq(adapter);
bea3348e 1831 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1832
53e52c72
DM		 1833 /* If budget not fully consumed, exit the polling mode */
1834 if (work_done < budget) {
288379f0 1835 napi_complete(napi);
72ab5195
JB		 1836 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1837 ixgb_irq_enable(adapter);
1da177e4
LT		 1838 }
1839
bea3348e 1840 return work_done;
1da177e4 1841}
1da177e4
LT		 1842
1843/**
1844 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1845 * @adapter: board private structure
1846 **/
1847
446490ca 1848static bool
1da177e4
LT		 1849ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1850{
1851 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1852 struct net_device *netdev = adapter->netdev;
1853 struct ixgb_tx_desc *tx_desc, *eop_desc;
1854 struct ixgb_buffer *buffer_info;
1855 unsigned int i, eop;
446490ca 1856 bool cleaned = false;
1da177e4
LT		 1857
1858 i = tx_ring->next_to_clean;
1859 eop = tx_ring->buffer_info[i].next_to_watch;
1860 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1861
9a432992 1862 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1863
2d0bb1c1 1864 rmb(); /* read buffer_info after eop_desc */
446490ca 1865 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1866 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1867 buffer_info = &tx_ring->buffer_info[i];
1868
0060c072
JB		 1869 if (tx_desc->popts &
1870 (IXGB_TX_DESC_POPTS_TXSM |
1871 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1872 adapter->hw_csum_tx_good++;
1873
1874 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1875
222441a6 1876 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1877
1878 cleaned = (i == eop);
03f83041 1879 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1880 }
1881
1882 eop = tx_ring->buffer_info[i].next_to_watch;
1883 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1884 }
1885
1886 tx_ring->next_to_clean = i;
1887
0f8ecbad
JB		 1888 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1889 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1890 /* Make sure that anybody stopping the queue after this
1891 * sees the new next_to_clean. */
1892 smp_mb();
1893
1894 if (netif_queue_stopped(netdev) &&
1895 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1896 netif_wake_queue(netdev);
0f8ecbad
JB		 1897 ++adapter->restart_queue;
1898 }
1da177e4 1899 }
1da177e4 1900
03f83041 1901 if (adapter->detect_tx_hung) {
1da177e4
LT		 1902 /* detect a transmit hang in hardware, this serializes the
1903 * check with the clearing of time_stamp and movement of i */
446490ca 1904 adapter->detect_tx_hung = false;
fe52eeb8 1905 if (tx_ring->buffer_info[eop].time_stamp &&
9b8118df 1906 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1907 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1908 IXGB_STATUS_TXOFF)) {
1909 /* detected Tx unit hang */
6909c66d
JP		 1910 netif_err(adapter, drv, adapter->netdev,
1911 "Detected Tx Unit Hang\n"
1912 " TDH <%x>\n"
1913 " TDT <%x>\n"
1914 " next_to_use <%x>\n"
1915 " next_to_clean <%x>\n"
1916 "buffer_info[next_to_clean]\n"
1917 " time_stamp <%lx>\n"
1918 " next_to_watch <%x>\n"
1919 " jiffies <%lx>\n"
1920 " next_to_watch.status <%x>\n",
1921 IXGB_READ_REG(&adapter->hw, TDH),
1922 IXGB_READ_REG(&adapter->hw, TDT),
1923 tx_ring->next_to_use,
1924 tx_ring->next_to_clean,
1925 tx_ring->buffer_info[eop].time_stamp,
1926 eop,
1927 jiffies,
1928 eop_desc->status);
1da177e4 1929 netif_stop_queue(netdev);
9b8118df 1930 }
1da177e4
LT		 1931 }
1932
1933 return cleaned;
1934}
1935
1936/**
1937 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1938 * @adapter: board private structure
1939 * @rx_desc: receive descriptor
1940 * @sk_buff: socket buffer with received data
1941 **/
1942
235949d1 1943static void
1da177e4 1944ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1945 struct ixgb_rx_desc *rx_desc,
1946 struct sk_buff *skb)
1da177e4
LT		 1947{
1948 /* Ignore Checksum bit is set OR
1949 * TCP Checksum has not been calculated
1950 */
03f83041 1951 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4 1952 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
bc8acf2c 1953 skb_checksum_none_assert(skb);
1da177e4
LT		 1954 return;
1955 }
1956
1957 /* At this point we know the hardware did the TCP checksum */
1958 /* now look at the TCP checksum error bit */
03f83041 1959 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4 1960 /* let the stack verify checksum errors */
bc8acf2c 1961 skb_checksum_none_assert(skb);
1da177e4
LT		 1962 adapter->hw_csum_rx_error++;
1963 } else {
1964 /* TCP checksum is good */
1965 skb->ip_summed = CHECKSUM_UNNECESSARY;
1966 adapter->hw_csum_rx_good++;
1967 }
1968}
1969
57bf6eef
JP		 1970/*
1971 * this should improve performance for small packets with large amounts
1972 * of reassembly being done in the stack
1973 */
1974static void ixgb_check_copybreak(struct net_device *netdev,
1975 struct ixgb_buffer *buffer_info,
1976 u32 length, struct sk_buff **skb)
1977{
1978 struct sk_buff *new_skb;
1979
1980 if (length > copybreak)
1981 return;
1982
1983 new_skb = netdev_alloc_skb_ip_align(netdev, length);
1984 if (!new_skb)
1985 return;
1986
1987 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
1988 (*skb)->data - NET_IP_ALIGN,
1989 length + NET_IP_ALIGN);
1990 /* save the skb in buffer_info as good */
1991 buffer_info->skb = *skb;
1992 *skb = new_skb;
1993}
1994
1da177e4
LT		 1995/**
1996 * ixgb_clean_rx_irq - Send received data up the network stack,
1997 * @adapter: board private structure
1998 **/
1999
446490ca 2000static bool
1da177e4 2001ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1da177e4
LT		 2002{
2003 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2004 struct net_device *netdev = adapter->netdev;
2005 struct pci_dev *pdev = adapter->pdev;
2006 struct ixgb_rx_desc *rx_desc, *next_rxd;
2007 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 2008 u32 length;
1da177e4 2009 unsigned int i, j;
fc2d14e3 2010 int cleaned_count = 0;
446490ca 2011 bool cleaned = false;
1da177e4
LT		 2012
2013 i = rx_ring->next_to_clean;
2014 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2015 buffer_info = &rx_ring->buffer_info[i];
2016
9a432992 2017 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
fc2d14e3 2018 struct sk_buff *skb;
f404de1c 2019 u8 status;
1da177e4 2020
03f83041 2021 if (*work_done >= work_to_do)
1da177e4
LT		 2022 break;
2023
2024 (*work_done)++;
2d0bb1c1 2025 rmb(); /* read descriptor and rx_buffer_info after status DD */
f404de1c 2026 status = rx_desc->status;
1da177e4 2027 skb = buffer_info->skb;
1dfdd7df 2028 buffer_info->skb = NULL;
f404de1c 2029
fc2d14e3 2030 prefetch(skb->data - NET_IP_ALIGN);
1da177e4 2031
57bf6eef
JP		 2032 if (++i == rx_ring->count)
2033 i = 0;
1da177e4
LT		 2034 next_rxd = IXGB_RX_DESC(*rx_ring, i);
2035 prefetch(next_rxd);
2036
57bf6eef
JP		 2037 j = i + 1;
2038 if (j == rx_ring->count)
2039 j = 0;
1da177e4
LT		 2040 next2_buffer = &rx_ring->buffer_info[j];
2041 prefetch(next2_buffer);
2042
2043 next_buffer = &rx_ring->buffer_info[i];
1da177e4 2044
446490ca 2045 cleaned = true;
fc2d14e3 2046 cleaned_count++;
1da177e4 2047
47631f85 2048 dma_unmap_single(&pdev->dev,
1da177e4
LT		 2049 buffer_info->dma,
2050 buffer_info->length,
47631f85 2051 DMA_FROM_DEVICE);
fc2d14e3 2052 buffer_info->dma = 0;
1da177e4
LT		 2053
2054 length = le16_to_cpu(rx_desc->length);
fc2d14e3 2055 rx_desc->length = 0;
1da177e4 2056
03f83041 2057 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 2058
2059 /* All receives must fit into a single buffer */
2060
5edc4465
JP		 2061 pr_debug("Receive packet consumed multiple buffers length<%x>\n",
2062 length);
1da177e4
LT		 2063
2064 dev_kfree_skb_irq(skb);
f404de1c 2065 goto rxdesc_done;
1da177e4
LT		 2066 }
2067
0060c072
JB		 2068 if (unlikely(rx_desc->errors &
2069 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
2070 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 2071 dev_kfree_skb_irq(skb);
f404de1c 2072 goto rxdesc_done;
1da177e4
LT		 2073 }
2074
57bf6eef 2075 ixgb_check_copybreak(netdev, buffer_info, length, &skb);
6b900bb4 2076
1da177e4
LT		 2077 /* Good Receive */
2078 skb_put(skb, length);
2079
2080 /* Receive Checksum Offload */
2081 ixgb_rx_checksum(adapter, rx_desc, skb);
2082
2083 skb->protocol = eth_type_trans(skb, netdev);
e2444d92 2084 if (status & IXGB_RX_DESC_STATUS_VP)
86a9bad3
PM		 2085 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2086 le16_to_cpu(rx_desc->special));
e2444d92
ET		 2087
2088 netif_receive_skb(skb);
1da177e4 2089
f404de1c
MC		 2090rxdesc_done:
2091 /* clean up descriptor, might be written over by hw */
1da177e4 2092 rx_desc->status = 0;
1da177e4 2093
fc2d14e3
JB		 2094 /* return some buffers to hardware, one at a time is too slow */
2095 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
2096 ixgb_alloc_rx_buffers(adapter, cleaned_count);
2097 cleaned_count = 0;
2098 }
2099
f404de1c 2100 /* use prefetched values */
1da177e4
LT		 2101 rx_desc = next_rxd;
2102 buffer_info = next_buffer;
2103 }
2104
2105 rx_ring->next_to_clean = i;
2106
fc2d14e3
JB		 2107 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2108 if (cleaned_count)
2109 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1da177e4
LT		 2110
2111 return cleaned;
2112}
2113
2114/**
2115 * ixgb_alloc_rx_buffers - Replace used receive buffers
2116 * @adapter: address of board private structure
2117 **/
2118
2119static void
fc2d14e3 2120ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
1da177e4
LT		 2121{
2122 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2123 struct net_device *netdev = adapter->netdev;
2124 struct pci_dev *pdev = adapter->pdev;
2125 struct ixgb_rx_desc *rx_desc;
2126 struct ixgb_buffer *buffer_info;
2127 struct sk_buff *skb;
2128 unsigned int i;
1da177e4
LT		 2129 long cleancount;
2130
2131 i = rx_ring->next_to_use;
2132 buffer_info = &rx_ring->buffer_info[i];
2133 cleancount = IXGB_DESC_UNUSED(rx_ring);
2134
1da177e4 2135
41639fed 2136 /* leave three descriptors unused */
fc2d14e3 2137 while (--cleancount > 2 && cleaned_count--) {
1dfdd7df 2138 /* recycle! its good for you */
69c7a940
AK		 2139 skb = buffer_info->skb;
2140 if (skb) {
1dfdd7df
AK		 2141 skb_trim(skb, 0);
2142 goto map_skb;
2143 }
1da177e4 2144
89d71a66 2145 skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
1dfdd7df 2146 if (unlikely(!skb)) {
1da177e4 2147 /* Better luck next round */
1dfdd7df 2148 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2149 break;
2150 }
2151
1da177e4
LT		 2152 buffer_info->skb = skb;
2153 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df 2154map_skb:
47631f85 2155 buffer_info->dma = dma_map_single(&pdev->dev,
1dfdd7df
AK		 2156 skb->data,
2157 adapter->rx_buffer_len,
47631f85 2158 DMA_FROM_DEVICE);
065946c6
CP		 2159 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
2160 adapter->alloc_rx_buff_failed++;
2161 break;
2162 }
1da177e4 2163
1dfdd7df 2164 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2165 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2166 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2167 * this is the rest of the workaround for h/w double
41639fed
MC		 2168 * writeback. */
2169 rx_desc->status = 0;
1da177e4 2170
1da177e4 2171
065946c6
CP		 2172 if (++i == rx_ring->count)
2173 i = 0;
1da177e4
LT		 2174 buffer_info = &rx_ring->buffer_info[i];
2175 }
2176
1dfdd7df
AK		 2177 if (likely(rx_ring->next_to_use != i)) {
2178 rx_ring->next_to_use = i;
2179 if (unlikely(i-- == 0))
2180 i = (rx_ring->count - 1);
2181
2182 /* Force memory writes to complete before letting h/w
2183 * know there are new descriptors to fetch. (Only
2184 * applicable for weak-ordered memory model archs, such
2185 * as IA-64). */
2186 wmb();
2187 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2188 }
1da177e4
LT		 2189}
2190
ae54496f
ET		 2191static void
2192ixgb_vlan_strip_enable(struct ixgb_adapter *adapter)
2193{
2194 u32 ctrl;
1da177e4 2195
ae54496f
ET		 2196 /* enable VLAN tag insert/strip */
2197 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2198 ctrl |= IXGB_CTRL0_VME;
2199 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2200}
1da177e4 2201
ae54496f
ET		 2202static void
2203ixgb_vlan_strip_disable(struct ixgb_adapter *adapter)
2204{
2205 u32 ctrl;
1da177e4 2206
ae54496f
ET		 2207 /* disable VLAN tag insert/strip */
2208 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2209 ctrl &= ~IXGB_CTRL0_VME;
2210 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
1da177e4
LT		 2211}
2212
8e586137 2213static int
80d5c368 2214ixgb_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
1da177e4 2215{
8908c6cd 2216 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2217 u32 vfta, index;
1da177e4
LT		 2218
2219 /* add VID to filter table */
2220
2221 index = (vid >> 5) & 0x7F;
2222 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2223 vfta |= (1 << (vid & 0x1F));
2224 ixgb_write_vfta(&adapter->hw, index, vfta);
e2444d92 2225 set_bit(vid, adapter->active_vlans);
8e586137
JP		 2226
2227 return 0;
1da177e4
LT		 2228}
2229
8e586137 2230static int
80d5c368 2231ixgb_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
1da177e4 2232{
8908c6cd 2233 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2234 u32 vfta, index;
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);
e2444d92 2242 clear_bit(vid, adapter->active_vlans);
8e586137
JP		 2243
2244 return 0;
1da177e4
LT		 2245}
2246
2247static void
2248ixgb_restore_vlan(struct ixgb_adapter *adapter)
2249{
e2444d92
ET		 2250 u16 vid;
2251
2252 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
80d5c368 2253 ixgb_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
1da177e4
LT		 2254}
2255
1da177e4
LT		 2256#ifdef CONFIG_NET_POLL_CONTROLLER
2257/*
2258 * Polling 'interrupt' - used by things like netconsole to send skbs
2259 * without having to re-enable interrupts. It's not called while
2260 * the interrupt routine is executing.
2261 */
2262
2263static void ixgb_netpoll(struct net_device *dev)
2264{
f990b426 2265 struct ixgb_adapter *adapter = netdev_priv(dev);
ac79c82e 2266
1da177e4 2267 disable_irq(adapter->pdev->irq);
7d12e780 2268 ixgb_intr(adapter->pdev->irq, dev);
1da177e4
LT		 2269 enable_irq(adapter->pdev->irq);
2270}
2271#endif
2272
01748fbb 2273/**
49ce9c2c
BH		 2274 * ixgb_io_error_detected - called when PCI error is detected
2275 * @pdev: pointer to pci device with error
2276 * @state: pci channel state after error
01748fbb
LV		 2277 *
2278 * This callback is called by the PCI subsystem whenever
2279 * a PCI bus error is detected.
2280 */
0060c072
JB		 2281static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2282 enum pci_channel_state state)
01748fbb
LV		 2283{
2284 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2285 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2286
d6a1f83b
DN		 2287 netif_device_detach(netdev);
2288
2289 if (state == pci_channel_io_perm_failure)
2290 return PCI_ERS_RESULT_DISCONNECT;
2291
03f83041 2292 if (netif_running(netdev))
446490ca 2293 ixgb_down(adapter, true);
01748fbb
LV		 2294
2295 pci_disable_device(pdev);
2296
2297 /* Request a slot reset. */
2298 return PCI_ERS_RESULT_NEED_RESET;
2299}
2300
2301/**
2302 * ixgb_io_slot_reset - called after the pci bus has been reset.
2303 * @pdev pointer to pci device with error
2304 *
52035bdb 2305 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2306 * Basically, this tries to restart the card from scratch.
2307 * This is a shortened version of the device probe/discovery code,
2308 * it resembles the first-half of the ixgb_probe() routine.
2309 */
0060c072 2310static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2311{
2312 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2313 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2314
03f83041 2315 if (pci_enable_device(pdev)) {
6909c66d
JP		 2316 netif_err(adapter, probe, adapter->netdev,
2317 "Cannot re-enable PCI device after reset\n");
01748fbb
LV		 2318 return PCI_ERS_RESULT_DISCONNECT;
2319 }
2320
2321 /* Perform card reset only on one instance of the card */
2322 if (0 != PCI_FUNC (pdev->devfn))
2323 return PCI_ERS_RESULT_RECOVERED;
2324
2325 pci_set_master(pdev);
2326
2327 netif_carrier_off(netdev);
2328 netif_stop_queue(netdev);
2329 ixgb_reset(adapter);
2330
2331 /* Make sure the EEPROM is good */
03f83041 2332 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
6909c66d
JP		 2333 netif_err(adapter, probe, adapter->netdev,
2334 "After reset, the EEPROM checksum is not valid\n");
01748fbb
LV		 2335 return PCI_ERS_RESULT_DISCONNECT;
2336 }
2337 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2338 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2339
03f83041 2340 if (!is_valid_ether_addr(netdev->perm_addr)) {
6909c66d
JP		 2341 netif_err(adapter, probe, adapter->netdev,
2342 "After reset, invalid MAC address\n");
01748fbb
LV		 2343 return PCI_ERS_RESULT_DISCONNECT;
2344 }
2345
2346 return PCI_ERS_RESULT_RECOVERED;
2347}
2348
2349/**
2350 * ixgb_io_resume - called when its OK to resume normal operations
2351 * @pdev pointer to pci device with error
2352 *
2353 * The error recovery driver tells us that its OK to resume
2354 * normal operation. Implementation resembles the second-half
2355 * of the ixgb_probe() routine.
2356 */
0060c072 2357static void ixgb_io_resume(struct pci_dev *pdev)
01748fbb
LV		 2358{
2359 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2360 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2361
2362 pci_set_master(pdev);
2363
03f83041
JB		 2364 if (netif_running(netdev)) {
2365 if (ixgb_up(adapter)) {
d328bc83 2366 pr_err("can't bring device back up after reset\n");
01748fbb
LV		 2367 return;
2368 }
2369 }
2370
2371 netif_device_attach(netdev);
2372 mod_timer(&adapter->watchdog_timer, jiffies);
2373}
2374
1da177e4 2375/* ixgb_main.c */
kernel source for telekom puls (alcatel/mediatek)