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net: introduce and use netdev_features_t for device features sets
[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) = {
1da177e4
LT		 57 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
58 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
940829e2
AK		 59 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
60 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1da177e4
LT		 61 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
62 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
7490d71a 63 {INTEL_VENDOR_ID, 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);
76static void __devexit ixgb_remove(struct pci_dev *pdev);
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);
222441a6
JP		 104static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
105static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
1da177e4
LT		 106static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
107
1da177e4
LT		 108#ifdef CONFIG_NET_POLL_CONTROLLER
109/* for netdump / net console */
110static void ixgb_netpoll(struct net_device *dev);
111#endif
112
01748fbb 113static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
7490d71a 114 enum pci_channel_state state);
01748fbb
LV		 115static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
116static void ixgb_io_resume (struct pci_dev *pdev);
1da177e4 117
01748fbb
LV		 118static struct pci_error_handlers ixgb_err_handler = {
119 .error_detected = ixgb_io_error_detected,
120 .slot_reset = ixgb_io_slot_reset,
121 .resume = ixgb_io_resume,
122};
123
1da177e4 124static struct pci_driver ixgb_driver = {
c2eba932 125 .name = ixgb_driver_name,
1da177e4 126 .id_table = ixgb_pci_tbl,
c2eba932
MC		 127 .probe = ixgb_probe,
128 .remove = __devexit_p(ixgb_remove),
01748fbb 129 .err_handler = &ixgb_err_handler
1da177e4
LT		 130};
131
132MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
133MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
134MODULE_LICENSE("GPL");
01e5abc2 135MODULE_VERSION(DRV_VERSION);
1da177e4 136
ec9c3f5d
AK		 137#define DEFAULT_DEBUG_LEVEL_SHIFT 3
138static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
139module_param(debug, int, 0);
140MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
141
1da177e4
LT		 142/**
143 * ixgb_init_module - Driver Registration Routine
144 *
145 * ixgb_init_module is the first routine called when the driver is
146 * loaded. All it does is register with the PCI subsystem.
147 **/
148
149static int __init
150ixgb_init_module(void)
151{
d328bc83
JP		 152 pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version);
153 pr_info("%s\n", ixgb_copyright);
1da177e4 154
29917620 155 return pci_register_driver(&ixgb_driver);
1da177e4
LT		 156}
157
158module_init(ixgb_init_module);
159
160/**
161 * ixgb_exit_module - Driver Exit Cleanup Routine
162 *
163 * ixgb_exit_module is called just before the driver is removed
164 * from memory.
165 **/
166
167static void __exit
168ixgb_exit_module(void)
169{
1da177e4
LT		 170 pci_unregister_driver(&ixgb_driver);
171}
172
173module_exit(ixgb_exit_module);
174
175/**
176 * ixgb_irq_disable - Mask off interrupt generation on the NIC
177 * @adapter: board private structure
178 **/
179
235949d1 180static void
1da177e4
LT		 181ixgb_irq_disable(struct ixgb_adapter *adapter)
182{
1da177e4
LT		 183 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
184 IXGB_WRITE_FLUSH(&adapter->hw);
185 synchronize_irq(adapter->pdev->irq);
186}
187
188/**
189 * ixgb_irq_enable - Enable default interrupt generation settings
190 * @adapter: board private structure
191 **/
192
235949d1 193static void
1da177e4
LT		 194ixgb_irq_enable(struct ixgb_adapter *adapter)
195{
9c61a9dc
JB		 196 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
197 IXGB_INT_TXDW | IXGB_INT_LSC;
198 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
199 val |= IXGB_INT_GPI0;
200 IXGB_WRITE_REG(&adapter->hw, IMS, val);
201 IXGB_WRITE_FLUSH(&adapter->hw);
1da177e4
LT		 202}
203
204int
205ixgb_up(struct ixgb_adapter *adapter)
206{
207 struct net_device *netdev = adapter->netdev;
fb136c07 208 int err, irq_flags = IRQF_SHARED;
1da177e4
LT		 209 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
210 struct ixgb_hw *hw = &adapter->hw;
211
212 /* hardware has been reset, we need to reload some things */
213
8556f0d1 214 ixgb_rar_set(hw, netdev->dev_addr, 0);
1da177e4
LT		 215 ixgb_set_multi(netdev);
216
217 ixgb_restore_vlan(adapter);
218
219 ixgb_configure_tx(adapter);
220 ixgb_setup_rctl(adapter);
221 ixgb_configure_rx(adapter);
fc2d14e3 222 ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));
1da177e4 223
e59d1696
AK		 224 /* disable interrupts and get the hardware into a known state */
225 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
226
fb136c07
AK		 227 /* only enable MSI if bus is in PCI-X mode */
228 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
229 err = pci_enable_msi(adapter->pdev);
230 if (!err) {
231 adapter->have_msi = 1;
232 irq_flags = 0;
233 }
1da177e4
LT		 234 /* proceed to try to request regular interrupt */
235 }
1da177e4 236
a0607fd3 237 err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags,
fb136c07
AK		 238 netdev->name, netdev);
239 if (err) {
240 if (adapter->have_msi)
241 pci_disable_msi(adapter->pdev);
6909c66d
JP		 242 netif_err(adapter, probe, adapter->netdev,
243 "Unable to allocate interrupt Error: %d\n", err);
1da177e4 244 return err;
ec9c3f5d 245 }
1da177e4 246
03f83041 247 if ((hw->max_frame_size != max_frame) ||
1da177e4
LT		 248 (hw->max_frame_size !=
249 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
250
251 hw->max_frame_size = max_frame;
252
253 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
254
03f83041 255 if (hw->max_frame_size >
1da177e4 256 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
222441a6 257 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
1da177e4 258
03f83041 259 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
1da177e4
LT		 260 ctrl0 |= IXGB_CTRL0_JFE;
261 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
262 }
263 }
264 }
265
bab2bce7 266 clear_bit(__IXGB_DOWN, &adapter->flags);
1da177e4 267
bea3348e 268 napi_enable(&adapter->napi);
e59d1696
AK		 269 ixgb_irq_enable(adapter);
270
4cb9be7a
JB		 271 netif_wake_queue(netdev);
272
bab2bce7
JB		 273 mod_timer(&adapter->watchdog_timer, jiffies);
274
1da177e4
LT		 275 return 0;
276}
277
278void
446490ca 279ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
1da177e4
LT		 280{
281 struct net_device *netdev = adapter->netdev;
282
bab2bce7
JB		 283 /* prevent the interrupt handler from restarting watchdog */
284 set_bit(__IXGB_DOWN, &adapter->flags);
285
49d85c50 286 napi_disable(&adapter->napi);
bab2bce7 287 /* waiting for NAPI to complete can re-enable interrupts */
1da177e4
LT		 288 ixgb_irq_disable(adapter);
289 free_irq(adapter->pdev->irq, netdev);
fb136c07
AK		 290
291 if (adapter->have_msi)
1da177e4
LT		 292 pci_disable_msi(adapter->pdev);
293
03f83041 294 if (kill_watchdog)
1da177e4 295 del_timer_sync(&adapter->watchdog_timer);
49d85c50 296
1da177e4
LT		 297 adapter->link_speed = 0;
298 adapter->link_duplex = 0;
299 netif_carrier_off(netdev);
300 netif_stop_queue(netdev);
301
302 ixgb_reset(adapter);
303 ixgb_clean_tx_ring(adapter);
304 ixgb_clean_rx_ring(adapter);
305}
306
307void
308ixgb_reset(struct ixgb_adapter *adapter)
309{
3fd7131f 310 struct ixgb_hw *hw = &adapter->hw;
1da177e4 311
3fd7131f
MW		 312 ixgb_adapter_stop(hw);
313 if (!ixgb_init_hw(hw))
6909c66d 314 netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n");
3fd7131f
MW		 315
316 /* restore frame size information */
317 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
318 if (hw->max_frame_size >
319 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
320 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
321 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
322 ctrl0 |= IXGB_CTRL0_JFE;
323 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
324 }
325 }
1da177e4
LT		 326}
327
c8f44aff
MM		 328static netdev_features_t
329ixgb_fix_features(struct net_device *netdev, netdev_features_t features)
f04ea74e
MM		 330{
331 /*
332 * Tx VLAN insertion does not work per HW design when Rx stripping is
333 * disabled.
334 */
335 if (!(features & NETIF_F_HW_VLAN_RX))
336 features &= ~NETIF_F_HW_VLAN_TX;
337
338 return features;
339}
340
d7ccb8c2 341static int
c8f44aff 342ixgb_set_features(struct net_device *netdev, netdev_features_t features)
d7ccb8c2
MM		 343{
344 struct ixgb_adapter *adapter = netdev_priv(netdev);
c8f44aff 345 netdev_features_t changed = features ^ netdev->features;
d7ccb8c2 346
f04ea74e 347 if (!(changed & (NETIF_F_RXCSUM|NETIF_F_HW_VLAN_RX)))
d7ccb8c2
MM		 348 return 0;
349
350 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
351
352 if (netif_running(netdev)) {
353 ixgb_down(adapter, true);
354 ixgb_up(adapter);
355 ixgb_set_speed_duplex(netdev);
356 } else
357 ixgb_reset(adapter);
358
359 return 0;
360}
361
362
0edc3527
SH		 363static const struct net_device_ops ixgb_netdev_ops = {
364 .ndo_open = ixgb_open,
365 .ndo_stop = ixgb_close,
00829823 366 .ndo_start_xmit = ixgb_xmit_frame,
0edc3527 367 .ndo_get_stats = ixgb_get_stats,
afc4b13d 368 .ndo_set_rx_mode = ixgb_set_multi,
0edc3527
SH		 369 .ndo_validate_addr = eth_validate_addr,
370 .ndo_set_mac_address = ixgb_set_mac,
371 .ndo_change_mtu = ixgb_change_mtu,
372 .ndo_tx_timeout = ixgb_tx_timeout,
0edc3527
SH		 373 .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid,
374 .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid,
375#ifdef CONFIG_NET_POLL_CONTROLLER
376 .ndo_poll_controller = ixgb_netpoll,
377#endif
f04ea74e 378 .ndo_fix_features = ixgb_fix_features,
d7ccb8c2 379 .ndo_set_features = ixgb_set_features,
0edc3527
SH		 380};
381
1da177e4
LT		 382/**
383 * ixgb_probe - Device Initialization Routine
384 * @pdev: PCI device information struct
385 * @ent: entry in ixgb_pci_tbl
386 *
387 * Returns 0 on success, negative on failure
388 *
389 * ixgb_probe initializes an adapter identified by a pci_dev structure.
390 * The OS initialization, configuring of the adapter private structure,
391 * and a hardware reset occur.
392 **/
393
394static int __devinit
0060c072 395ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 396{
397 struct net_device *netdev = NULL;
398 struct ixgb_adapter *adapter;
399 static int cards_found = 0;
1da177e4
LT		 400 int pci_using_dac;
401 int i;
402 int err;
403
9e7bd330
JB		 404 err = pci_enable_device(pdev);
405 if (err)
1da177e4
LT		 406 return err;
407
47631f85
NN		 408 pci_using_dac = 0;
409 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
410 if (!err) {
411 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
412 if (!err)
413 pci_using_dac = 1;
1da177e4 414 } else {
47631f85
NN		 415 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
416 if (err) {
417 err = dma_set_coherent_mask(&pdev->dev,
418 DMA_BIT_MASK(32));
419 if (err) {
420 pr_err("No usable DMA configuration, aborting\n");
421 goto err_dma_mask;
422 }
1da177e4 423 }
1da177e4
LT		 424 }
425
9e7bd330
JB		 426 err = pci_request_regions(pdev, ixgb_driver_name);
427 if (err)
c91e468a 428 goto err_request_regions;
1da177e4
LT		 429
430 pci_set_master(pdev);
431
432 netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
03f83041 433 if (!netdev) {
1da177e4
LT		 434 err = -ENOMEM;
435 goto err_alloc_etherdev;
436 }
437
1da177e4
LT		 438 SET_NETDEV_DEV(netdev, &pdev->dev);
439
440 pci_set_drvdata(pdev, netdev);
8908c6cd 441 adapter = netdev_priv(netdev);
1da177e4
LT		 442 adapter->netdev = netdev;
443 adapter->pdev = pdev;
444 adapter->hw.back = adapter;
ec9c3f5d 445 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
1da177e4 446
275f165f 447 adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
e539e466 448 if (!adapter->hw.hw_addr) {
1da177e4
LT		 449 err = -EIO;
450 goto err_ioremap;
451 }
452
1459336d 453 for (i = BAR_1; i <= BAR_5; i++) {
03f83041 454 if (pci_resource_len(pdev, i) == 0)
1da177e4 455 continue;
03f83041 456 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 457 adapter->hw.io_base = pci_resource_start(pdev, i);
458 break;
459 }
460 }
461
0edc3527 462 netdev->netdev_ops = &ixgb_netdev_ops;
1da177e4 463 ixgb_set_ethtool_ops(netdev);
9b8118df 464 netdev->watchdog_timeo = 5 * HZ;
bea3348e 465 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
1da177e4 466
0eb5a34c 467 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 468
469 adapter->bd_number = cards_found;
470 adapter->link_speed = 0;
471 adapter->link_duplex = 0;
472
473 /* setup the private structure */
474
9e7bd330
JB		 475 err = ixgb_sw_init(adapter);
476 if (err)
1da177e4
LT		 477 goto err_sw_init;
478
d7ccb8c2
MM		 479 netdev->hw_features = NETIF_F_SG |
480 NETIF_F_TSO |
f04ea74e 481 NETIF_F_HW_CSUM |
1da177e4 482 NETIF_F_HW_VLAN_TX |
f04ea74e
MM		 483 NETIF_F_HW_VLAN_RX;
484 netdev->features = netdev->hw_features |
1da177e4 485 NETIF_F_HW_VLAN_FILTER;
d7ccb8c2 486 netdev->hw_features |= NETIF_F_RXCSUM;
1da177e4 487
7b872a55 488 if (pci_using_dac) {
1da177e4 489 netdev->features |= NETIF_F_HIGHDMA;
7b872a55
YZ		 490 netdev->vlan_features |= NETIF_F_HIGHDMA;
491 }
1da177e4
LT		 492
493 /* make sure the EEPROM is good */
494
03f83041 495 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
6909c66d
JP		 496 netif_err(adapter, probe, adapter->netdev,
497 "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 498 err = -EIO;
499 goto err_eeprom;
500 }
501
502 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
df859c51 503 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1da177e4 504
03f83041 505 if (!is_valid_ether_addr(netdev->perm_addr)) {
6909c66d 506 netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n");
1da177e4
LT		 507 err = -EIO;
508 goto err_eeprom;
509 }
510
511 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
512
513 init_timer(&adapter->watchdog_timer);
c061b18d 514 adapter->watchdog_timer.function = ixgb_watchdog;
1da177e4
LT		 515 adapter->watchdog_timer.data = (unsigned long)adapter;
516
c4028958 517 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
1da177e4 518
ec9c3f5d 519 strcpy(netdev->name, "eth%d");
9e7bd330
JB		 520 err = register_netdev(netdev);
521 if (err)
1da177e4
LT		 522 goto err_register;
523
3a6d1bc4 524 /* carrier off reporting is important to ethtool even BEFORE open */
1da177e4 525 netif_carrier_off(netdev);
1da177e4 526
6909c66d
JP		 527 netif_info(adapter, probe, adapter->netdev,
528 "Intel(R) PRO/10GbE Network Connection\n");
1da177e4
LT		 529 ixgb_check_options(adapter);
530 /* reset the hardware with the new settings */
531
532 ixgb_reset(adapter);
533
534 cards_found++;
535 return 0;
536
537err_register:
538err_sw_init:
539err_eeprom:
540 iounmap(adapter->hw.hw_addr);
541err_ioremap:
542 free_netdev(netdev);
543err_alloc_etherdev:
544 pci_release_regions(pdev);
c91e468a
AS		 545err_request_regions:
546err_dma_mask:
547 pci_disable_device(pdev);
1da177e4
LT		 548 return err;
549}
550
551/**
552 * ixgb_remove - Device Removal Routine
553 * @pdev: PCI device information struct
554 *
555 * ixgb_remove is called by the PCI subsystem to alert the driver
556 * that it should release a PCI device. The could be caused by a
557 * Hot-Plug event, or because the driver is going to be removed from
558 * memory.
559 **/
560
561static void __devexit
562ixgb_remove(struct pci_dev *pdev)
563{
564 struct net_device *netdev = pci_get_drvdata(pdev);
8908c6cd 565 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 566
23f333a2 567 cancel_work_sync(&adapter->tx_timeout_task);
12579697 568
1da177e4
LT		 569 unregister_netdev(netdev);
570
571 iounmap(adapter->hw.hw_addr);
572 pci_release_regions(pdev);
573
574 free_netdev(netdev);
ec43a81c 575 pci_disable_device(pdev);
1da177e4
LT		 576}
577
578/**
579 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
580 * @adapter: board private structure to initialize
581 *
582 * ixgb_sw_init initializes the Adapter private data structure.
583 * Fields are initialized based on PCI device information and
584 * OS network device settings (MTU size).
585 **/
586
587static int __devinit
588ixgb_sw_init(struct ixgb_adapter *adapter)
589{
590 struct ixgb_hw *hw = &adapter->hw;
591 struct net_device *netdev = adapter->netdev;
592 struct pci_dev *pdev = adapter->pdev;
593
594 /* PCI config space info */
595
596 hw->vendor_id = pdev->vendor;
597 hw->device_id = pdev->device;
598 hw->subsystem_vendor_id = pdev->subsystem_vendor;
599 hw->subsystem_id = pdev->subsystem_device;
600
1da177e4 601 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
a3dc3da0 602 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
1da177e4 603
6909c66d
JP		 604 if ((hw->device_id == IXGB_DEVICE_ID_82597EX) ||
605 (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) ||
606 (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) ||
607 (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
0060c072 608 hw->mac_type = ixgb_82597;
1da177e4
LT		 609 else {
610 /* should never have loaded on this device */
6909c66d 611 netif_err(adapter, probe, adapter->netdev, "unsupported device id\n");
1da177e4
LT		 612 }
613
614 /* enable flow control to be programmed */
615 hw->fc.send_xon = 1;
616
bab2bce7 617 set_bit(__IXGB_DOWN, &adapter->flags);
1da177e4
LT		 618 return 0;
619}
620
621/**
622 * ixgb_open - Called when a network interface is made active
623 * @netdev: network interface device structure
624 *
625 * Returns 0 on success, negative value on failure
626 *
627 * The open entry point is called when a network interface is made
628 * active by the system (IFF_UP). At this point all resources needed
629 * for transmit and receive operations are allocated, the interrupt
630 * handler is registered with the OS, the watchdog timer is started,
631 * and the stack is notified that the interface is ready.
632 **/
633
634static int
635ixgb_open(struct net_device *netdev)
636{
8908c6cd 637 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 638 int err;
639
640 /* allocate transmit descriptors */
9e7bd330
JB		 641 err = ixgb_setup_tx_resources(adapter);
642 if (err)
1da177e4
LT		 643 goto err_setup_tx;
644
3a6d1bc4
JB		 645 netif_carrier_off(netdev);
646
1da177e4
LT		 647 /* allocate receive descriptors */
648
9e7bd330
JB		 649 err = ixgb_setup_rx_resources(adapter);
650 if (err)
1da177e4
LT		 651 goto err_setup_rx;
652
9e7bd330
JB		 653 err = ixgb_up(adapter);
654 if (err)
1da177e4
LT		 655 goto err_up;
656
3a6d1bc4
JB		 657 netif_start_queue(netdev);
658
1da177e4
LT		 659 return 0;
660
661err_up:
662 ixgb_free_rx_resources(adapter);
663err_setup_rx:
664 ixgb_free_tx_resources(adapter);
665err_setup_tx:
666 ixgb_reset(adapter);
667
668 return err;
669}
670
671/**
672 * ixgb_close - Disables a network interface
673 * @netdev: network interface device structure
674 *
675 * Returns 0, this is not allowed to fail
676 *
677 * The close entry point is called when an interface is de-activated
678 * by the OS. The hardware is still under the drivers control, but
679 * needs to be disabled. A global MAC reset is issued to stop the
680 * hardware, and all transmit and receive resources are freed.
681 **/
682
683static int
684ixgb_close(struct net_device *netdev)
685{
8908c6cd 686 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 687
446490ca 688 ixgb_down(adapter, true);
1da177e4
LT		 689
690 ixgb_free_tx_resources(adapter);
691 ixgb_free_rx_resources(adapter);
692
693 return 0;
694}
695
696/**
697 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
698 * @adapter: board private structure
699 *
700 * Return 0 on success, negative on failure
701 **/
702
703int
704ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
705{
706 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
707 struct pci_dev *pdev = adapter->pdev;
708 int size;
709
710 size = sizeof(struct ixgb_buffer) * txdr->count;
89bf67f1 711 txdr->buffer_info = vzalloc(size);
03f83041 712 if (!txdr->buffer_info) {
6909c66d
JP		 713 netif_err(adapter, probe, adapter->netdev,
714 "Unable to allocate transmit descriptor ring memory\n");
1da177e4
LT		 715 return -ENOMEM;
716 }
1da177e4
LT		 717
718 /* round up to nearest 4K */
719
720 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
55e924cf 721 txdr->size = ALIGN(txdr->size, 4096);
1da177e4 722
47631f85
NN		 723 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
724 GFP_KERNEL);
03f83041 725 if (!txdr->desc) {
1da177e4 726 vfree(txdr->buffer_info);
6909c66d
JP		 727 netif_err(adapter, probe, adapter->netdev,
728 "Unable to allocate transmit descriptor memory\n");
1da177e4
LT		 729 return -ENOMEM;
730 }
731 memset(txdr->desc, 0, txdr->size);
732
733 txdr->next_to_use = 0;
734 txdr->next_to_clean = 0;
735
736 return 0;
737}
738
739/**
740 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
741 * @adapter: board private structure
742 *
743 * Configure the Tx unit of the MAC after a reset.
744 **/
745
746static void
747ixgb_configure_tx(struct ixgb_adapter *adapter)
748{
222441a6
JP		 749 u64 tdba = adapter->tx_ring.dma;
750 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
751 u32 tctl;
1da177e4
LT		 752 struct ixgb_hw *hw = &adapter->hw;
753
0060c072
JB		 754 /* Setup the Base and Length of the Tx Descriptor Ring
755 * tx_ring.dma can be either a 32 or 64 bit value
1da177e4
LT		 756 */
757
758 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
759 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
760
761 IXGB_WRITE_REG(hw, TDLEN, tdlen);
762
763 /* Setup the HW Tx Head and Tail descriptor pointers */
764
765 IXGB_WRITE_REG(hw, TDH, 0);
766 IXGB_WRITE_REG(hw, TDT, 0);
767
768 /* don't set up txdctl, it induces performance problems if configured
769 * incorrectly */
770 /* Set the Tx Interrupt Delay register */
771
772 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
773
774 /* Program the Transmit Control Register */
775
776 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
777 IXGB_WRITE_REG(hw, TCTL, tctl);
778
779 /* Setup Transmit Descriptor Settings for this adapter */
780 adapter->tx_cmd_type =
0060c072
JB		 781 IXGB_TX_DESC_TYPE |
782 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
1da177e4
LT		 783}
784
785/**
786 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
787 * @adapter: board private structure
788 *
789 * Returns 0 on success, negative on failure
790 **/
791
792int
793ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
794{
795 struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
796 struct pci_dev *pdev = adapter->pdev;
797 int size;
798
799 size = sizeof(struct ixgb_buffer) * rxdr->count;
89bf67f1 800 rxdr->buffer_info = vzalloc(size);
03f83041 801 if (!rxdr->buffer_info) {
6909c66d
JP		 802 netif_err(adapter, probe, adapter->netdev,
803 "Unable to allocate receive descriptor ring\n");
1da177e4
LT		 804 return -ENOMEM;
805 }
1da177e4
LT		 806
807 /* Round up to nearest 4K */
808
809 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
55e924cf 810 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4 811
47631f85
NN		 812 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
813 GFP_KERNEL);
1da177e4 814
03f83041 815 if (!rxdr->desc) {
1da177e4 816 vfree(rxdr->buffer_info);
6909c66d
JP		 817 netif_err(adapter, probe, adapter->netdev,
818 "Unable to allocate receive descriptors\n");
1da177e4
LT		 819 return -ENOMEM;
820 }
821 memset(rxdr->desc, 0, rxdr->size);
822
823 rxdr->next_to_clean = 0;
824 rxdr->next_to_use = 0;
825
826 return 0;
827}
828
829/**
830 * ixgb_setup_rctl - configure the receive control register
831 * @adapter: Board private structure
832 **/
833
834static void
835ixgb_setup_rctl(struct ixgb_adapter *adapter)
836{
222441a6 837 u32 rctl;
1da177e4
LT		 838
839 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
840
841 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
842
843 rctl |=
0060c072
JB		 844 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
845 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
1da177e4
LT		 846 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
847
848 rctl |= IXGB_RCTL_SECRC;
849
3f3dc0dd 850 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
1da177e4 851 rctl |= IXGB_RCTL_BSIZE_2048;
3f3dc0dd 852 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
1da177e4 853 rctl |= IXGB_RCTL_BSIZE_4096;
3f3dc0dd 854 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
1da177e4 855 rctl |= IXGB_RCTL_BSIZE_8192;
3f3dc0dd 856 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
1da177e4 857 rctl |= IXGB_RCTL_BSIZE_16384;
1da177e4
LT		 858
859 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
860}
861
862/**
863 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
864 * @adapter: board private structure
865 *
866 * Configure the Rx unit of the MAC after a reset.
867 **/
868
869static void
870ixgb_configure_rx(struct ixgb_adapter *adapter)
871{
222441a6
JP		 872 u64 rdba = adapter->rx_ring.dma;
873 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
1da177e4 874 struct ixgb_hw *hw = &adapter->hw;
222441a6
JP		 875 u32 rctl;
876 u32 rxcsum;
1da177e4
LT		 877
878 /* make sure receives are disabled while setting up the descriptors */
879
880 rctl = IXGB_READ_REG(hw, RCTL);
881 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
882
883 /* set the Receive Delay Timer Register */
884
885 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
886
887 /* Setup the Base and Length of the Rx Descriptor Ring */
888
889 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
890 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
891
892 IXGB_WRITE_REG(hw, RDLEN, rdlen);
893
894 /* Setup the HW Rx Head and Tail Descriptor Pointers */
895 IXGB_WRITE_REG(hw, RDH, 0);
896 IXGB_WRITE_REG(hw, RDT, 0);
897
4360386f
JB		 898 /* due to the hardware errata with RXDCTL, we are unable to use any of
899 * the performance enhancing features of it without causing other
900 * subtle bugs, some of the bugs could include receive length
901 * corruption at high data rates (WTHRESH > 0) and/or receive
902 * descriptor ring irregularites (particularly in hardware cache) */
903 IXGB_WRITE_REG(hw, RXDCTL, 0);
1da177e4
LT		 904
905 /* Enable Receive Checksum Offload for TCP and UDP */
446490ca 906 if (adapter->rx_csum) {
1da177e4
LT		 907 rxcsum = IXGB_READ_REG(hw, RXCSUM);
908 rxcsum |= IXGB_RXCSUM_TUOFL;
909 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
910 }
911
912 /* Enable Receives */
913
914 IXGB_WRITE_REG(hw, RCTL, rctl);
915}
916
917/**
918 * ixgb_free_tx_resources - Free Tx Resources
919 * @adapter: board private structure
920 *
921 * Free all transmit software resources
922 **/
923
924void
925ixgb_free_tx_resources(struct ixgb_adapter *adapter)
926{
927 struct pci_dev *pdev = adapter->pdev;
928
929 ixgb_clean_tx_ring(adapter);
930
931 vfree(adapter->tx_ring.buffer_info);
932 adapter->tx_ring.buffer_info = NULL;
933
47631f85
NN		 934 dma_free_coherent(&pdev->dev, adapter->tx_ring.size,
935 adapter->tx_ring.desc, adapter->tx_ring.dma);
1da177e4
LT		 936
937 adapter->tx_ring.desc = NULL;
938}
939
235949d1 940static void
1da177e4 941ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
0060c072 942 struct ixgb_buffer *buffer_info)
1da177e4 943{
adeaa908
AD		 944 if (buffer_info->dma) {
945 if (buffer_info->mapped_as_page)
47631f85
NN		 946 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
947 buffer_info->length, DMA_TO_DEVICE);
adeaa908 948 else
47631f85
NN		 949 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
950 buffer_info->length, DMA_TO_DEVICE);
adeaa908
AD		 951 buffer_info->dma = 0;
952 }
953
fe52eeb8 954 if (buffer_info->skb) {
fe52eeb8
AD		 955 dev_kfree_skb_any(buffer_info->skb);
956 buffer_info->skb = NULL;
957 }
1dfdd7df
AK		 958 buffer_info->time_stamp = 0;
959 /* these fields must always be initialized in tx
960 * buffer_info->length = 0;
961 * buffer_info->next_to_watch = 0; */
1da177e4
LT		 962}
963
964/**
965 * ixgb_clean_tx_ring - Free Tx Buffers
966 * @adapter: board private structure
967 **/
968
969static void
970ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
971{
972 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
973 struct ixgb_buffer *buffer_info;
974 unsigned long size;
975 unsigned int i;
976
977 /* Free all the Tx ring sk_buffs */
978
1459336d 979 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 980 buffer_info = &tx_ring->buffer_info[i];
981 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
982 }
983
984 size = sizeof(struct ixgb_buffer) * tx_ring->count;
985 memset(tx_ring->buffer_info, 0, size);
986
987 /* Zero out the descriptor ring */
988
989 memset(tx_ring->desc, 0, tx_ring->size);
990
991 tx_ring->next_to_use = 0;
992 tx_ring->next_to_clean = 0;
993
994 IXGB_WRITE_REG(&adapter->hw, TDH, 0);
995 IXGB_WRITE_REG(&adapter->hw, TDT, 0);
996}
997
998/**
999 * ixgb_free_rx_resources - Free Rx Resources
1000 * @adapter: board private structure
1001 *
1002 * Free all receive software resources
1003 **/
1004
1005void
1006ixgb_free_rx_resources(struct ixgb_adapter *adapter)
1007{
1008 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1009 struct pci_dev *pdev = adapter->pdev;
1010
1011 ixgb_clean_rx_ring(adapter);
1012
1013 vfree(rx_ring->buffer_info);
1014 rx_ring->buffer_info = NULL;
1015
47631f85
NN		 1016 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1017 rx_ring->dma);
1da177e4
LT		 1018
1019 rx_ring->desc = NULL;
1020}
1021
1022/**
1023 * ixgb_clean_rx_ring - Free Rx Buffers
1024 * @adapter: board private structure
1025 **/
1026
1027static void
1028ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
1029{
1030 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1031 struct ixgb_buffer *buffer_info;
1032 struct pci_dev *pdev = adapter->pdev;
1033 unsigned long size;
1034 unsigned int i;
1035
1036 /* Free all the Rx ring sk_buffs */
1037
1459336d 1038 for (i = 0; i < rx_ring->count; i++) {
1da177e4 1039 buffer_info = &rx_ring->buffer_info[i];
23e55a32 1040 if (buffer_info->dma) {
47631f85 1041 dma_unmap_single(&pdev->dev,
1da177e4
LT		 1042 buffer_info->dma,
1043 buffer_info->length,
47631f85 1044 DMA_FROM_DEVICE);
23e55a32
BJ		 1045 buffer_info->dma = 0;
1046 buffer_info->length = 0;
1047 }
1da177e4 1048
23e55a32 1049 if (buffer_info->skb) {
1da177e4 1050 dev_kfree_skb(buffer_info->skb);
1da177e4
LT		 1051 buffer_info->skb = NULL;
1052 }
1053 }
1054
1055 size = sizeof(struct ixgb_buffer) * rx_ring->count;
1056 memset(rx_ring->buffer_info, 0, size);
1057
1058 /* Zero out the descriptor ring */
1059
1060 memset(rx_ring->desc, 0, rx_ring->size);
1061
1062 rx_ring->next_to_clean = 0;
1063 rx_ring->next_to_use = 0;
1064
1065 IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1066 IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1067}
1068
1069/**
1070 * ixgb_set_mac - Change the Ethernet Address of the NIC
1071 * @netdev: network interface device structure
1072 * @p: pointer to an address structure
1073 *
1074 * Returns 0 on success, negative on failure
1075 **/
1076
1077static int
1078ixgb_set_mac(struct net_device *netdev, void *p)
1079{
8908c6cd 1080 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1081 struct sockaddr *addr = p;
1082
03f83041 1083 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 1084 return -EADDRNOTAVAIL;
1085
1086 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1087
1088 ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1089
1090 return 0;
1091}
1092
1093/**
1094 * ixgb_set_multi - Multicast and Promiscuous mode set
1095 * @netdev: network interface device structure
1096 *
1097 * The set_multi entry point is called whenever the multicast address
1098 * list or the network interface flags are updated. This routine is
1099 * responsible for configuring the hardware for proper multicast,
1100 * promiscuous mode, and all-multi behavior.
1101 **/
1102
1103static void
1104ixgb_set_multi(struct net_device *netdev)
1105{
8908c6cd 1106 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1107 struct ixgb_hw *hw = &adapter->hw;
22bedad3 1108 struct netdev_hw_addr *ha;
222441a6 1109 u32 rctl;
1da177e4
LT		 1110
1111 /* Check for Promiscuous and All Multicast modes */
1112
1113 rctl = IXGB_READ_REG(hw, RCTL);
1114
03f83041 1115 if (netdev->flags & IFF_PROMISC) {
1da177e4 1116 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
ae54496f
ET		 1117 /* disable VLAN filtering */
1118 rctl &= ~IXGB_RCTL_CFIEN;
746b9f02 1119 rctl &= ~IXGB_RCTL_VFE;
1da177e4 1120 } else {
746b9f02
PM		 1121 if (netdev->flags & IFF_ALLMULTI) {
1122 rctl |= IXGB_RCTL_MPE;
1123 rctl &= ~IXGB_RCTL_UPE;
1124 } else {
1125 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1126 }
ae54496f 1127 /* enable VLAN filtering */
78ed11a5 1128 rctl |= IXGB_RCTL_VFE;
ae54496f 1129 rctl &= ~IXGB_RCTL_CFIEN;
1da177e4
LT		 1130 }
1131
4cd24eaf 1132 if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1da177e4
LT		 1133 rctl |= IXGB_RCTL_MPE;
1134 IXGB_WRITE_REG(hw, RCTL, rctl);
1135 } else {
ac5ac789
JB		 1136 u8 *mta = kmalloc(IXGB_MAX_NUM_MULTICAST_ADDRESSES *
1137 ETH_ALEN, GFP_ATOMIC);
1138 u8 *addr;
1139 if (!mta) {
1140 pr_err("allocation of multicast memory failed\n");
1141 goto alloc_failed;
1142 }
1da177e4
LT		 1143
1144 IXGB_WRITE_REG(hw, RCTL, rctl);
1145
ac5ac789
JB		 1146 addr = mta;
1147 netdev_for_each_mc_addr(ha, netdev) {
1148 memcpy(addr, ha->addr, ETH_ALEN);
1149 addr += ETH_ALEN;
1150 }
1da177e4 1151
4cd24eaf 1152 ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0);
ac5ac789 1153 kfree(mta);
1da177e4 1154 }
ae54496f 1155
ac5ac789 1156alloc_failed:
ae54496f
ET		 1157 if (netdev->features & NETIF_F_HW_VLAN_RX)
1158 ixgb_vlan_strip_enable(adapter);
1159 else
1160 ixgb_vlan_strip_disable(adapter);
1161
1da177e4
LT		 1162}
1163
1164/**
1165 * ixgb_watchdog - Timer Call-back
1166 * @data: pointer to netdev cast into an unsigned long
1167 **/
1168
1169static void
1170ixgb_watchdog(unsigned long data)
1171{
1172 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1173 struct net_device *netdev = adapter->netdev;
1174 struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1175
1176 ixgb_check_for_link(&adapter->hw);
1177
1178 if (ixgb_check_for_bad_link(&adapter->hw)) {
1179 /* force the reset path */
1180 netif_stop_queue(netdev);
1181 }
1182
03f83041
JB		 1183 if (adapter->hw.link_up) {
1184 if (!netif_carrier_ok(netdev)) {
d328bc83
JP		 1185 netdev_info(netdev,
1186 "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
1187 (adapter->hw.fc.type == ixgb_fc_full) ?
1188 "RX/TX" :
1189 (adapter->hw.fc.type == ixgb_fc_rx_pause) ?
1190 "RX" :
1191 (adapter->hw.fc.type == ixgb_fc_tx_pause) ?
1192 "TX" : "None");
1da177e4
LT		 1193 adapter->link_speed = 10000;
1194 adapter->link_duplex = FULL_DUPLEX;
1195 netif_carrier_on(netdev);
1da177e4
LT		 1196 }
1197 } else {
03f83041 1198 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 1199 adapter->link_speed = 0;
1200 adapter->link_duplex = 0;
d328bc83 1201 netdev_info(netdev, "NIC Link is Down\n");
1da177e4 1202 netif_carrier_off(netdev);
1da177e4
LT		 1203 }
1204 }
1205
1206 ixgb_update_stats(adapter);
1207
03f83041
JB		 1208 if (!netif_carrier_ok(netdev)) {
1209 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 1210 /* We've lost link, so the controller stops DMA,
1211 * but we've got queued Tx work that's never going
1212 * to get done, so reset controller to flush Tx.
1213 * (Do the reset outside of interrupt context). */
1214 schedule_work(&adapter->tx_timeout_task);
c2d5ab49
JB		 1215 /* return immediately since reset is imminent */
1216 return;
1da177e4
LT		 1217 }
1218 }
1219
1220 /* Force detection of hung controller every watchdog period */
446490ca 1221 adapter->detect_tx_hung = true;
1da177e4
LT		 1222
1223 /* generate an interrupt to force clean up of any stragglers */
1224 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1225
1226 /* Reset the timer */
1227 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1228}
1229
1230#define IXGB_TX_FLAGS_CSUM 0x00000001
1231#define IXGB_TX_FLAGS_VLAN 0x00000002
1232#define IXGB_TX_FLAGS_TSO 0x00000004
1233
235949d1 1234static int
1da177e4
LT		 1235ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1236{
1da177e4
LT		 1237 struct ixgb_context_desc *context_desc;
1238 unsigned int i;
222441a6
JP		 1239 u8 ipcss, ipcso, tucss, tucso, hdr_len;
1240 u16 ipcse, tucse, mss;
1da177e4
LT		 1241 int err;
1242
89114afd 1243 if (likely(skb_is_gso(skb))) {
adc54139 1244 struct ixgb_buffer *buffer_info;
eddc9ec5
ACM		 1245 struct iphdr *iph;
1246
1da177e4
LT		 1247 if (skb_header_cloned(skb)) {
1248 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1249 if (err)
1250 return err;
1251 }
1252
ab6a5bb6 1253 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 1254 mss = skb_shinfo(skb)->gso_size;
eddc9ec5
ACM		 1255 iph = ip_hdr(skb);
1256 iph->tot_len = 0;
1257 iph->check = 0;
aa8223c7
ACM		 1258 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1259 iph->daddr, 0,
1260 IPPROTO_TCP, 0);
bbe735e4 1261 ipcss = skb_network_offset(skb);
eddc9ec5 1262 ipcso = (void *)&(iph->check) - (void *)skb->data;
ea2ae17d
ACM		 1263 ipcse = skb_transport_offset(skb) - 1;
1264 tucss = skb_transport_offset(skb);
aa8223c7 1265 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 1266 tucse = 0;
1267
1268 i = adapter->tx_ring.next_to_use;
1269 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1270 buffer_info = &adapter->tx_ring.buffer_info[i];
1271 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1272
1273 context_desc->ipcss = ipcss;
1274 context_desc->ipcso = ipcso;
1275 context_desc->ipcse = cpu_to_le16(ipcse);
1276 context_desc->tucss = tucss;
1277 context_desc->tucso = tucso;
1278 context_desc->tucse = cpu_to_le16(tucse);
1279 context_desc->mss = cpu_to_le16(mss);
1280 context_desc->hdr_len = hdr_len;
1281 context_desc->status = 0;
1282 context_desc->cmd_type_len = cpu_to_le32(
0060c072 1283 IXGB_CONTEXT_DESC_TYPE
1da177e4
LT		 1284 | IXGB_CONTEXT_DESC_CMD_TSE
1285 | IXGB_CONTEXT_DESC_CMD_IP
1286 | IXGB_CONTEXT_DESC_CMD_TCP
1da177e4
LT		 1287 | IXGB_CONTEXT_DESC_CMD_IDE
1288 | (skb->len - (hdr_len)));
1289
06c2f9ec 1290
03f83041 1291 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1292 adapter->tx_ring.next_to_use = i;
1293
1294 return 1;
1295 }
1da177e4
LT		 1296
1297 return 0;
1298}
1299
446490ca 1300static bool
1da177e4
LT		 1301ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1302{
1303 struct ixgb_context_desc *context_desc;
1304 unsigned int i;
222441a6 1305 u8 css, cso;
1da177e4 1306
03f83041 1307 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
adc54139 1308 struct ixgb_buffer *buffer_info;
0d0b1672 1309 css = skb_checksum_start_offset(skb);
ff1dcadb 1310 cso = css + skb->csum_offset;
1da177e4
LT		 1311
1312 i = adapter->tx_ring.next_to_use;
1313 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
adc54139
JB		 1314 buffer_info = &adapter->tx_ring.buffer_info[i];
1315 WARN_ON(buffer_info->dma != 0);
1da177e4
LT		 1316
1317 context_desc->tucss = css;
1318 context_desc->tucso = cso;
1319 context_desc->tucse = 0;
1320 /* zero out any previously existing data in one instruction */
222441a6 1321 *(u32 *)&(context_desc->ipcss) = 0;
1da177e4
LT		 1322 context_desc->status = 0;
1323 context_desc->hdr_len = 0;
1324 context_desc->mss = 0;
1325 context_desc->cmd_type_len =
1326 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
06c2f9ec 1327 | IXGB_TX_DESC_CMD_IDE);
1da177e4 1328
03f83041 1329 if (++i == adapter->tx_ring.count) i = 0;
1da177e4
LT		 1330 adapter->tx_ring.next_to_use = i;
1331
446490ca 1332 return true;
1da177e4
LT		 1333 }
1334
446490ca 1335 return false;
1da177e4
LT		 1336}
1337
1338#define IXGB_MAX_TXD_PWR 14
1339#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR)
1340
235949d1 1341static int
1da177e4
LT		 1342ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1343 unsigned int first)
1344{
1345 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
adeaa908 1346 struct pci_dev *pdev = adapter->pdev;
1da177e4 1347 struct ixgb_buffer *buffer_info;
fe52eeb8 1348 int len = skb_headlen(skb);
1da177e4 1349 unsigned int offset = 0, size, count = 0, i;
5d927853 1350 unsigned int mss = skb_shinfo(skb)->gso_size;
1da177e4
LT		 1351 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1352 unsigned int f;
1da177e4
LT		 1353
1354 i = tx_ring->next_to_use;
1355
9a432992 1356 while (len) {
1da177e4 1357 buffer_info = &tx_ring->buffer_info[i];
709cf018 1358 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1359 /* Workaround for premature desc write-backs
1360 * in TSO mode. Append 4-byte sentinel desc */
1361 if (unlikely(mss && !nr_frags && size == len && size > 8))
1362 size -= 4;
1363
1da177e4 1364 buffer_info->length = size;
adc54139 1365 WARN_ON(buffer_info->dma != 0);
34336635 1366 buffer_info->time_stamp = jiffies;
adeaa908 1367 buffer_info->mapped_as_page = false;
47631f85
NN		 1368 buffer_info->dma = dma_map_single(&pdev->dev,
1369 skb->data + offset,
1370 size, DMA_TO_DEVICE);
1371 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
adeaa908 1372 goto dma_error;
1dfdd7df 1373 buffer_info->next_to_watch = 0;
1da177e4
LT		 1374
1375 len -= size;
1376 offset += size;
1377 count++;
fe52eeb8
AD		 1378 if (len) {
1379 i++;
1380 if (i == tx_ring->count)
1381 i = 0;
1382 }
1da177e4
LT		 1383 }
1384
1459336d 1385 for (f = 0; f < nr_frags; f++) {
9e903e08 1386 const struct skb_frag_struct *frag;
1da177e4
LT		 1387
1388 frag = &skb_shinfo(skb)->frags[f];
9e903e08 1389 len = skb_frag_size(frag);
877749bf 1390 offset = 0;
1da177e4 1391
9a432992 1392 while (len) {
fe52eeb8
AD		 1393 i++;
1394 if (i == tx_ring->count)
1395 i = 0;
1396
1da177e4 1397 buffer_info = &tx_ring->buffer_info[i];
709cf018 1398 size = min(len, IXGB_MAX_DATA_PER_TXD);
5d927853
JB		 1399
1400 /* Workaround for premature desc write-backs
1401 * in TSO mode. Append 4-byte sentinel desc */
19abe86d
AK		 1402 if (unlikely(mss && (f == (nr_frags - 1))
1403 && size == len && size > 8))
5d927853
JB		 1404 size -= 4;
1405
1da177e4 1406 buffer_info->length = size;
34336635 1407 buffer_info->time_stamp = jiffies;
adeaa908
AD		 1408 buffer_info->mapped_as_page = true;
1409 buffer_info->dma =
877749bf
IC		 1410 skb_frag_dma_map(&pdev->dev, frag, offset, size,
1411 DMA_TO_DEVICE);
47631f85 1412 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
adeaa908 1413 goto dma_error;
1dfdd7df 1414 buffer_info->next_to_watch = 0;
1da177e4
LT		 1415
1416 len -= size;
1417 offset += size;
1418 count++;
1da177e4
LT		 1419 }
1420 }
1da177e4
LT		 1421 tx_ring->buffer_info[i].skb = skb;
1422 tx_ring->buffer_info[first].next_to_watch = i;
1423
1424 return count;
adeaa908
AD		 1425
1426dma_error:
1427 dev_err(&pdev->dev, "TX DMA map failed\n");
1428 buffer_info->dma = 0;
c1fa347f 1429 if (count)
adeaa908 1430 count--;
c1fa347f
RK		 1431
1432 while (count--) {
1433 if (i==0)
adeaa908 1434 i += tx_ring->count;
c1fa347f 1435 i--;
adeaa908
AD		 1436 buffer_info = &tx_ring->buffer_info[i];
1437 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1438 }
1439
1440 return 0;
1da177e4
LT		 1441}
1442
235949d1 1443static void
1da177e4
LT		 1444ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1445{
1446 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1447 struct ixgb_tx_desc *tx_desc = NULL;
1448 struct ixgb_buffer *buffer_info;
222441a6
JP		 1449 u32 cmd_type_len = adapter->tx_cmd_type;
1450 u8 status = 0;
1451 u8 popts = 0;
1da177e4
LT		 1452 unsigned int i;
1453
03f83041 1454 if (tx_flags & IXGB_TX_FLAGS_TSO) {
1da177e4
LT		 1455 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1456 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1457 }
1458
03f83041 1459 if (tx_flags & IXGB_TX_FLAGS_CSUM)
1da177e4
LT		 1460 popts |= IXGB_TX_DESC_POPTS_TXSM;
1461
03f83041 1462 if (tx_flags & IXGB_TX_FLAGS_VLAN)
1da177e4 1463 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1da177e4
LT		 1464
1465 i = tx_ring->next_to_use;
1466
9a432992 1467 while (count--) {
1da177e4
LT		 1468 buffer_info = &tx_ring->buffer_info[i];
1469 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1470 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1471 tx_desc->cmd_type_len =
1472 cpu_to_le32(cmd_type_len | buffer_info->length);
1473 tx_desc->status = status;
1474 tx_desc->popts = popts;
1475 tx_desc->vlan = cpu_to_le16(vlan_id);
1476
03f83041 1477 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1478 }
1479
0060c072
JB		 1480 tx_desc->cmd_type_len |=
1481 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1da177e4
LT		 1482
1483 /* Force memory writes to complete before letting h/w
1484 * know there are new descriptors to fetch. (Only
1485 * applicable for weak-ordered memory model archs,
1486 * such as IA-64). */
1487 wmb();
1488
1489 tx_ring->next_to_use = i;
1490 IXGB_WRITE_REG(&adapter->hw, TDT, i);
1491}
1492
dfd341e4
JB		 1493static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1494{
1495 struct ixgb_adapter *adapter = netdev_priv(netdev);
1496 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1497
1498 netif_stop_queue(netdev);
1499 /* Herbert's original patch had:
1500 * smp_mb__after_netif_stop_queue();
1501 * but since that doesn't exist yet, just open code it. */
1502 smp_mb();
1503
1504 /* We need to check again in a case another CPU has just
1505 * made room available. */
1506 if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1507 return -EBUSY;
1508
1509 /* A reprieve! */
1510 netif_start_queue(netdev);
1511 ++adapter->restart_queue;
1512 return 0;
1513}
1514
1515static int ixgb_maybe_stop_tx(struct net_device *netdev,
1516 struct ixgb_desc_ring *tx_ring, int size)
1517{
1518 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1519 return 0;
1520 return __ixgb_maybe_stop_tx(netdev, size);
1521}
1522
1523
1da177e4
LT		 1524/* Tx Descriptors needed, worst case */
1525#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1526 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
5d927853
JB		 1527#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1528 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1529 + 1 /* one more needed for sentinel TSO workaround */
1da177e4 1530
3b29a56d 1531static netdev_tx_t
1da177e4
LT		 1532ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1533{
8908c6cd 1534 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1535 unsigned int first;
1536 unsigned int tx_flags = 0;
1da177e4 1537 int vlan_id = 0;
fe52eeb8 1538 int count = 0;
1da177e4
LT		 1539 int tso;
1540
bab2bce7
JB		 1541 if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1542 dev_kfree_skb(skb);
1543 return NETDEV_TX_OK;
1544 }
1545
03f83041 1546 if (skb->len <= 0) {
c2199340 1547 dev_kfree_skb(skb);
6ed10654 1548 return NETDEV_TX_OK;
1da177e4
LT		 1549 }
1550
dfd341e4 1551 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
db582944 1552 DESC_NEEDED)))
f017f14b 1553 return NETDEV_TX_BUSY;
1da177e4 1554
e2444d92 1555 if (vlan_tx_tag_present(skb)) {
1da177e4
LT		 1556 tx_flags |= IXGB_TX_FLAGS_VLAN;
1557 vlan_id = vlan_tx_tag_get(skb);
1558 }
1559
1560 first = adapter->tx_ring.next_to_use;
0060c072 1561
1da177e4
LT		 1562 tso = ixgb_tso(adapter, skb);
1563 if (tso < 0) {
c2199340 1564 dev_kfree_skb(skb);
1da177e4
LT		 1565 return NETDEV_TX_OK;
1566 }
1567
96f9c2e2 1568 if (likely(tso))
1da177e4 1569 tx_flags |= IXGB_TX_FLAGS_TSO;
03f83041 1570 else if (ixgb_tx_csum(adapter, skb))
1da177e4
LT		 1571 tx_flags |= IXGB_TX_FLAGS_CSUM;
1572
fe52eeb8 1573 count = ixgb_tx_map(adapter, skb, first);
1da177e4 1574
fe52eeb8
AD		 1575 if (count) {
1576 ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
fe52eeb8
AD		 1577 /* Make sure there is space in the ring for the next send. */
1578 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1da177e4 1579
fe52eeb8
AD		 1580 } else {
1581 dev_kfree_skb_any(skb);
1582 adapter->tx_ring.buffer_info[first].time_stamp = 0;
1583 adapter->tx_ring.next_to_use = first;
1584 }
f017f14b 1585
f017f14b 1586 return NETDEV_TX_OK;
1da177e4
LT		 1587}
1588
1589/**
1590 * ixgb_tx_timeout - Respond to a Tx Hang
1591 * @netdev: network interface device structure
1592 **/
1593
1594static void
1595ixgb_tx_timeout(struct net_device *netdev)
1596{
8908c6cd 1597 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1598
1599 /* Do the reset outside of interrupt context */
1600 schedule_work(&adapter->tx_timeout_task);
1601}
1602
1603static void
c4028958 1604ixgb_tx_timeout_task(struct work_struct *work)
1da177e4 1605{
c4028958
DH		 1606 struct ixgb_adapter *adapter =
1607 container_of(work, struct ixgb_adapter, tx_timeout_task);
1da177e4 1608
9b8118df 1609 adapter->tx_timeout_count++;
446490ca 1610 ixgb_down(adapter, true);
1da177e4
LT		 1611 ixgb_up(adapter);
1612}
1613
1614/**
1615 * ixgb_get_stats - Get System Network Statistics
1616 * @netdev: network interface device structure
1617 *
1618 * Returns the address of the device statistics structure.
1619 * The statistics are actually updated from the timer callback.
1620 **/
1621
1622static struct net_device_stats *
1623ixgb_get_stats(struct net_device *netdev)
1624{
0cdc0369 1625 return &netdev->stats;
1da177e4
LT		 1626}
1627
1628/**
1629 * ixgb_change_mtu - Change the Maximum Transfer Unit
1630 * @netdev: network interface device structure
1631 * @new_mtu: new value for maximum frame size
1632 *
1633 * Returns 0 on success, negative on failure
1634 **/
1635
1636static int
1637ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1638{
8908c6cd 1639 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1640 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1641 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1642
a65a604a
JB		 1643 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1644 if ((new_mtu < 68) ||
1645 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
6909c66d
JP		 1646 netif_err(adapter, probe, adapter->netdev,
1647 "Invalid MTU setting %d\n", new_mtu);
1da177e4
LT		 1648 return -EINVAL;
1649 }
1650
b5ca88eb
JB		 1651 if (old_max_frame == max_frame)
1652 return 0;
1653
1654 if (netif_running(netdev))
1655 ixgb_down(adapter, true);
1656
a3dc3da0 1657 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1da177e4
LT		 1658
1659 netdev->mtu = new_mtu;
1660
b5ca88eb 1661 if (netif_running(netdev))
1da177e4 1662 ixgb_up(adapter);
1da177e4
LT		 1663
1664 return 0;
1665}
1666
1667/**
1668 * ixgb_update_stats - Update the board statistics counters.
1669 * @adapter: board private structure
1670 **/
1671
1672void
1673ixgb_update_stats(struct ixgb_adapter *adapter)
1674{
5633684d 1675 struct net_device *netdev = adapter->netdev;
01748fbb
LV		 1676 struct pci_dev *pdev = adapter->pdev;
1677
1678 /* Prevent stats update while adapter is being reset */
81b1955e 1679 if (pci_channel_offline(pdev))
01748fbb 1680 return;
5633684d 1681
03f83041 1682 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
4cd24eaf 1683 (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
5633684d
MC		 1684 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1685 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1686 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
0060c072 1687 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
5633684d
MC		 1688
1689 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1690 /* fix up multicast stats by removing broadcasts */
03f83041 1691 if (multi >= bcast)
7b89178d 1692 multi -= bcast;
0060c072 1693
5633684d
MC		 1694 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1695 adapter->stats.mprch += (multi >> 32);
0060c072 1696 adapter->stats.bprcl += bcast_l;
5633684d
MC		 1697 adapter->stats.bprch += bcast_h;
1698 } else {
1699 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1700 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1701 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1702 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1703 }
1da177e4
LT		 1704 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1705 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1706 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1707 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1da177e4
LT		 1708 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1709 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1710 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1711 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1712 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1713 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1714 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1715 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1716 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1717 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1718 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1719 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1720 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1721 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1722 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1723 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1724 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1725 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1726 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1727 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1728 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1729 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1730 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1731 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1732 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1733 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1734 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1735 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1736 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1737 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1738 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1739 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1740 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1741 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1742 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1743 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1744 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1745 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1746 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1747 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1748 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1749 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1750 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1751 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1752 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1753 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1754 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1755 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1756 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1757 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1758 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1759 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1760
1761 /* Fill out the OS statistics structure */
1762
0cdc0369
AK		 1763 netdev->stats.rx_packets = adapter->stats.gprcl;
1764 netdev->stats.tx_packets = adapter->stats.gptcl;
1765 netdev->stats.rx_bytes = adapter->stats.gorcl;
1766 netdev->stats.tx_bytes = adapter->stats.gotcl;
1767 netdev->stats.multicast = adapter->stats.mprcl;
1768 netdev->stats.collisions = 0;
1da177e4
LT		 1769
1770 /* ignore RLEC as it reports errors for padded (<64bytes) frames
1771 * with a length in the type/len field */
0cdc0369 1772 netdev->stats.rx_errors =
1da177e4
LT		 1773 /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1774 adapter->stats.ruc +
1775 adapter->stats.roc /*+ adapter->stats.rlec */ +
1776 adapter->stats.icbc +
1777 adapter->stats.ecbc + adapter->stats.mpc;
1778
1da177e4 1779 /* see above
0cdc0369 1780 * netdev->stats.rx_length_errors = adapter->stats.rlec;
1da177e4
LT		 1781 */
1782
0cdc0369
AK		 1783 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
1784 netdev->stats.rx_fifo_errors = adapter->stats.mpc;
1785 netdev->stats.rx_missed_errors = adapter->stats.mpc;
1786 netdev->stats.rx_over_errors = adapter->stats.mpc;
1787
1788 netdev->stats.tx_errors = 0;
1789 netdev->stats.rx_frame_errors = 0;
1790 netdev->stats.tx_aborted_errors = 0;
1791 netdev->stats.tx_carrier_errors = 0;
1792 netdev->stats.tx_fifo_errors = 0;
1793 netdev->stats.tx_heartbeat_errors = 0;
1794 netdev->stats.tx_window_errors = 0;
1da177e4
LT		 1795}
1796
1797#define IXGB_MAX_INTR 10
1798/**
1799 * ixgb_intr - Interrupt Handler
1800 * @irq: interrupt number
1801 * @data: pointer to a network interface device structure
1da177e4
LT		 1802 **/
1803
1804static irqreturn_t
7d12e780 1805ixgb_intr(int irq, void *data)
1da177e4
LT		 1806{
1807 struct net_device *netdev = data;
8908c6cd 1808 struct ixgb_adapter *adapter = netdev_priv(netdev);
1da177e4 1809 struct ixgb_hw *hw = &adapter->hw;
222441a6 1810 u32 icr = IXGB_READ_REG(hw, ICR);
1da177e4 1811
03f83041 1812 if (unlikely(!icr))
1da177e4
LT		 1813 return IRQ_NONE; /* Not our interrupt */
1814
bab2bce7
JB		 1815 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1816 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1817 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4 1818
288379f0 1819 if (napi_schedule_prep(&adapter->napi)) {
1da177e4 1820
0060c072 1821 /* Disable interrupts and register for poll. The flush
1da177e4
LT		 1822 of the posted write is intentionally left out.
1823 */
1824
1da177e4 1825 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
288379f0 1826 __napi_schedule(&adapter->napi);
1da177e4 1827 }
1da177e4
LT		 1828 return IRQ_HANDLED;
1829}
1830
1da177e4
LT		 1831/**
1832 * ixgb_clean - NAPI Rx polling callback
1833 * @adapter: board private structure
1834 **/
1835
1836static int
bea3348e 1837ixgb_clean(struct napi_struct *napi, int budget)
1da177e4 1838{
bea3348e 1839 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1da177e4
LT		 1840 int work_done = 0;
1841
53e52c72 1842 ixgb_clean_tx_irq(adapter);
bea3348e 1843 ixgb_clean_rx_irq(adapter, &work_done, budget);
1da177e4 1844
53e52c72
DM		 1845 /* If budget not fully consumed, exit the polling mode */
1846 if (work_done < budget) {
288379f0 1847 napi_complete(napi);
72ab5195
JB		 1848 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1849 ixgb_irq_enable(adapter);
1da177e4
LT		 1850 }
1851
bea3348e 1852 return work_done;
1da177e4 1853}
1da177e4
LT		 1854
1855/**
1856 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1857 * @adapter: board private structure
1858 **/
1859
446490ca 1860static bool
1da177e4
LT		 1861ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1862{
1863 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1864 struct net_device *netdev = adapter->netdev;
1865 struct ixgb_tx_desc *tx_desc, *eop_desc;
1866 struct ixgb_buffer *buffer_info;
1867 unsigned int i, eop;
446490ca 1868 bool cleaned = false;
1da177e4
LT		 1869
1870 i = tx_ring->next_to_clean;
1871 eop = tx_ring->buffer_info[i].next_to_watch;
1872 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1873
9a432992 1874 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1da177e4 1875
2d0bb1c1 1876 rmb(); /* read buffer_info after eop_desc */
446490ca 1877 for (cleaned = false; !cleaned; ) {
1da177e4
LT		 1878 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1879 buffer_info = &tx_ring->buffer_info[i];
1880
0060c072
JB		 1881 if (tx_desc->popts &
1882 (IXGB_TX_DESC_POPTS_TXSM |
1883 IXGB_TX_DESC_POPTS_IXSM))
1da177e4
LT		 1884 adapter->hw_csum_tx_good++;
1885
1886 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1887
222441a6 1888 *(u32 *)&(tx_desc->status) = 0;
1da177e4
LT		 1889
1890 cleaned = (i == eop);
03f83041 1891 if (++i == tx_ring->count) i = 0;
1da177e4
LT		 1892 }
1893
1894 eop = tx_ring->buffer_info[i].next_to_watch;
1895 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1896 }
1897
1898 tx_ring->next_to_clean = i;
1899
0f8ecbad
JB		 1900 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1901 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1902 /* Make sure that anybody stopping the queue after this
1903 * sees the new next_to_clean. */
1904 smp_mb();
1905
1906 if (netif_queue_stopped(netdev) &&
1907 !(test_bit(__IXGB_DOWN, &adapter->flags))) {
3352a3b2 1908 netif_wake_queue(netdev);
0f8ecbad
JB		 1909 ++adapter->restart_queue;
1910 }
1da177e4 1911 }
1da177e4 1912
03f83041 1913 if (adapter->detect_tx_hung) {
1da177e4
LT		 1914 /* detect a transmit hang in hardware, this serializes the
1915 * check with the clearing of time_stamp and movement of i */
446490ca 1916 adapter->detect_tx_hung = false;
fe52eeb8 1917 if (tx_ring->buffer_info[eop].time_stamp &&
9b8118df 1918 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1da177e4 1919 && !(IXGB_READ_REG(&adapter->hw, STATUS) &
9b8118df
AK		 1920 IXGB_STATUS_TXOFF)) {
1921 /* detected Tx unit hang */
6909c66d
JP		 1922 netif_err(adapter, drv, adapter->netdev,
1923 "Detected Tx Unit Hang\n"
1924 " TDH <%x>\n"
1925 " TDT <%x>\n"
1926 " next_to_use <%x>\n"
1927 " next_to_clean <%x>\n"
1928 "buffer_info[next_to_clean]\n"
1929 " time_stamp <%lx>\n"
1930 " next_to_watch <%x>\n"
1931 " jiffies <%lx>\n"
1932 " next_to_watch.status <%x>\n",
1933 IXGB_READ_REG(&adapter->hw, TDH),
1934 IXGB_READ_REG(&adapter->hw, TDT),
1935 tx_ring->next_to_use,
1936 tx_ring->next_to_clean,
1937 tx_ring->buffer_info[eop].time_stamp,
1938 eop,
1939 jiffies,
1940 eop_desc->status);
1da177e4 1941 netif_stop_queue(netdev);
9b8118df 1942 }
1da177e4
LT		 1943 }
1944
1945 return cleaned;
1946}
1947
1948/**
1949 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1950 * @adapter: board private structure
1951 * @rx_desc: receive descriptor
1952 * @sk_buff: socket buffer with received data
1953 **/
1954
235949d1 1955static void
1da177e4 1956ixgb_rx_checksum(struct ixgb_adapter *adapter,
0060c072
JB		 1957 struct ixgb_rx_desc *rx_desc,
1958 struct sk_buff *skb)
1da177e4
LT		 1959{
1960 /* Ignore Checksum bit is set OR
1961 * TCP Checksum has not been calculated
1962 */
03f83041 1963 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1da177e4 1964 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
bc8acf2c 1965 skb_checksum_none_assert(skb);
1da177e4
LT		 1966 return;
1967 }
1968
1969 /* At this point we know the hardware did the TCP checksum */
1970 /* now look at the TCP checksum error bit */
03f83041 1971 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1da177e4 1972 /* let the stack verify checksum errors */
bc8acf2c 1973 skb_checksum_none_assert(skb);
1da177e4
LT		 1974 adapter->hw_csum_rx_error++;
1975 } else {
1976 /* TCP checksum is good */
1977 skb->ip_summed = CHECKSUM_UNNECESSARY;
1978 adapter->hw_csum_rx_good++;
1979 }
1980}
1981
57bf6eef
JP		 1982/*
1983 * this should improve performance for small packets with large amounts
1984 * of reassembly being done in the stack
1985 */
1986static void ixgb_check_copybreak(struct net_device *netdev,
1987 struct ixgb_buffer *buffer_info,
1988 u32 length, struct sk_buff **skb)
1989{
1990 struct sk_buff *new_skb;
1991
1992 if (length > copybreak)
1993 return;
1994
1995 new_skb = netdev_alloc_skb_ip_align(netdev, length);
1996 if (!new_skb)
1997 return;
1998
1999 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
2000 (*skb)->data - NET_IP_ALIGN,
2001 length + NET_IP_ALIGN);
2002 /* save the skb in buffer_info as good */
2003 buffer_info->skb = *skb;
2004 *skb = new_skb;
2005}
2006
1da177e4
LT		 2007/**
2008 * ixgb_clean_rx_irq - Send received data up the network stack,
2009 * @adapter: board private structure
2010 **/
2011
446490ca 2012static bool
1da177e4 2013ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1da177e4
LT		 2014{
2015 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2016 struct net_device *netdev = adapter->netdev;
2017 struct pci_dev *pdev = adapter->pdev;
2018 struct ixgb_rx_desc *rx_desc, *next_rxd;
2019 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
222441a6 2020 u32 length;
1da177e4 2021 unsigned int i, j;
fc2d14e3 2022 int cleaned_count = 0;
446490ca 2023 bool cleaned = false;
1da177e4
LT		 2024
2025 i = rx_ring->next_to_clean;
2026 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2027 buffer_info = &rx_ring->buffer_info[i];
2028
9a432992 2029 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
fc2d14e3 2030 struct sk_buff *skb;
f404de1c 2031 u8 status;
1da177e4 2032
03f83041 2033 if (*work_done >= work_to_do)
1da177e4
LT		 2034 break;
2035
2036 (*work_done)++;
2d0bb1c1 2037 rmb(); /* read descriptor and rx_buffer_info after status DD */
f404de1c 2038 status = rx_desc->status;
1da177e4 2039 skb = buffer_info->skb;
1dfdd7df 2040 buffer_info->skb = NULL;
f404de1c 2041
fc2d14e3 2042 prefetch(skb->data - NET_IP_ALIGN);
1da177e4 2043
57bf6eef
JP		 2044 if (++i == rx_ring->count)
2045 i = 0;
1da177e4
LT		 2046 next_rxd = IXGB_RX_DESC(*rx_ring, i);
2047 prefetch(next_rxd);
2048
57bf6eef
JP		 2049 j = i + 1;
2050 if (j == rx_ring->count)
2051 j = 0;
1da177e4
LT		 2052 next2_buffer = &rx_ring->buffer_info[j];
2053 prefetch(next2_buffer);
2054
2055 next_buffer = &rx_ring->buffer_info[i];
1da177e4 2056
446490ca 2057 cleaned = true;
fc2d14e3 2058 cleaned_count++;
1da177e4 2059
47631f85 2060 dma_unmap_single(&pdev->dev,
1da177e4
LT		 2061 buffer_info->dma,
2062 buffer_info->length,
47631f85 2063 DMA_FROM_DEVICE);
fc2d14e3 2064 buffer_info->dma = 0;
1da177e4
LT		 2065
2066 length = le16_to_cpu(rx_desc->length);
fc2d14e3 2067 rx_desc->length = 0;
1da177e4 2068
03f83041 2069 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1da177e4
LT		 2070
2071 /* All receives must fit into a single buffer */
2072
2073 IXGB_DBG("Receive packet consumed multiple buffers "
2074 "length<%x>\n", length);
2075
2076 dev_kfree_skb_irq(skb);
f404de1c 2077 goto rxdesc_done;
1da177e4
LT		 2078 }
2079
0060c072
JB		 2080 if (unlikely(rx_desc->errors &
2081 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
2082 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
1da177e4 2083 dev_kfree_skb_irq(skb);
f404de1c 2084 goto rxdesc_done;
1da177e4
LT		 2085 }
2086
57bf6eef 2087 ixgb_check_copybreak(netdev, buffer_info, length, &skb);
6b900bb4 2088
1da177e4
LT		 2089 /* Good Receive */
2090 skb_put(skb, length);
2091
2092 /* Receive Checksum Offload */
2093 ixgb_rx_checksum(adapter, rx_desc, skb);
2094
2095 skb->protocol = eth_type_trans(skb, netdev);
e2444d92
ET		 2096 if (status & IXGB_RX_DESC_STATUS_VP)
2097 __vlan_hwaccel_put_tag(skb,
2098 le16_to_cpu(rx_desc->special));
2099
2100 netif_receive_skb(skb);
1da177e4 2101
f404de1c
MC		 2102rxdesc_done:
2103 /* clean up descriptor, might be written over by hw */
1da177e4 2104 rx_desc->status = 0;
1da177e4 2105
fc2d14e3
JB		 2106 /* return some buffers to hardware, one at a time is too slow */
2107 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
2108 ixgb_alloc_rx_buffers(adapter, cleaned_count);
2109 cleaned_count = 0;
2110 }
2111
f404de1c 2112 /* use prefetched values */
1da177e4
LT		 2113 rx_desc = next_rxd;
2114 buffer_info = next_buffer;
2115 }
2116
2117 rx_ring->next_to_clean = i;
2118
fc2d14e3
JB		 2119 cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2120 if (cleaned_count)
2121 ixgb_alloc_rx_buffers(adapter, cleaned_count);
1da177e4
LT		 2122
2123 return cleaned;
2124}
2125
2126/**
2127 * ixgb_alloc_rx_buffers - Replace used receive buffers
2128 * @adapter: address of board private structure
2129 **/
2130
2131static void
fc2d14e3 2132ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
1da177e4
LT		 2133{
2134 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2135 struct net_device *netdev = adapter->netdev;
2136 struct pci_dev *pdev = adapter->pdev;
2137 struct ixgb_rx_desc *rx_desc;
2138 struct ixgb_buffer *buffer_info;
2139 struct sk_buff *skb;
2140 unsigned int i;
1da177e4
LT		 2141 long cleancount;
2142
2143 i = rx_ring->next_to_use;
2144 buffer_info = &rx_ring->buffer_info[i];
2145 cleancount = IXGB_DESC_UNUSED(rx_ring);
2146
1da177e4 2147
41639fed 2148 /* leave three descriptors unused */
fc2d14e3 2149 while (--cleancount > 2 && cleaned_count--) {
1dfdd7df 2150 /* recycle! its good for you */
69c7a940
AK		 2151 skb = buffer_info->skb;
2152 if (skb) {
1dfdd7df
AK		 2153 skb_trim(skb, 0);
2154 goto map_skb;
2155 }
1da177e4 2156
89d71a66 2157 skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
1dfdd7df 2158 if (unlikely(!skb)) {
1da177e4 2159 /* Better luck next round */
1dfdd7df 2160 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 2161 break;
2162 }
2163
1da177e4
LT		 2164 buffer_info->skb = skb;
2165 buffer_info->length = adapter->rx_buffer_len;
1dfdd7df 2166map_skb:
47631f85 2167 buffer_info->dma = dma_map_single(&pdev->dev,
1dfdd7df
AK		 2168 skb->data,
2169 adapter->rx_buffer_len,
47631f85 2170 DMA_FROM_DEVICE);
1da177e4 2171
1dfdd7df 2172 rx_desc = IXGB_RX_DESC(*rx_ring, i);
1da177e4 2173 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
41639fed 2174 /* guarantee DD bit not set now before h/w gets descriptor
0060c072 2175 * this is the rest of the workaround for h/w double
41639fed
MC		 2176 * writeback. */
2177 rx_desc->status = 0;
1da177e4 2178
1da177e4 2179
03f83041 2180 if (++i == rx_ring->count) i = 0;
1da177e4
LT		 2181 buffer_info = &rx_ring->buffer_info[i];
2182 }
2183
1dfdd7df
AK		 2184 if (likely(rx_ring->next_to_use != i)) {
2185 rx_ring->next_to_use = i;
2186 if (unlikely(i-- == 0))
2187 i = (rx_ring->count - 1);
2188
2189 /* Force memory writes to complete before letting h/w
2190 * know there are new descriptors to fetch. (Only
2191 * applicable for weak-ordered memory model archs, such
2192 * as IA-64). */
2193 wmb();
2194 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2195 }
1da177e4
LT		 2196}
2197
ae54496f
ET		 2198static void
2199ixgb_vlan_strip_enable(struct ixgb_adapter *adapter)
2200{
2201 u32 ctrl;
1da177e4 2202
ae54496f
ET		 2203 /* enable VLAN tag insert/strip */
2204 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2205 ctrl |= IXGB_CTRL0_VME;
2206 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2207}
1da177e4 2208
ae54496f
ET		 2209static void
2210ixgb_vlan_strip_disable(struct ixgb_adapter *adapter)
2211{
2212 u32 ctrl;
1da177e4 2213
ae54496f
ET		 2214 /* disable VLAN tag insert/strip */
2215 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2216 ctrl &= ~IXGB_CTRL0_VME;
2217 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
1da177e4
LT		 2218}
2219
2220static void
222441a6 2221ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1da177e4 2222{
8908c6cd 2223 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2224 u32 vfta, index;
1da177e4
LT		 2225
2226 /* add VID to filter table */
2227
2228 index = (vid >> 5) & 0x7F;
2229 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2230 vfta |= (1 << (vid & 0x1F));
2231 ixgb_write_vfta(&adapter->hw, index, vfta);
e2444d92 2232 set_bit(vid, adapter->active_vlans);
1da177e4
LT		 2233}
2234
2235static void
222441a6 2236ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1da177e4 2237{
8908c6cd 2238 struct ixgb_adapter *adapter = netdev_priv(netdev);
222441a6 2239 u32 vfta, index;
1da177e4 2240
bab2bce7 2241 /* remove VID from filter table */
1da177e4
LT		 2242
2243 index = (vid >> 5) & 0x7F;
2244 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2245 vfta &= ~(1 << (vid & 0x1F));
2246 ixgb_write_vfta(&adapter->hw, index, vfta);
e2444d92 2247 clear_bit(vid, adapter->active_vlans);
1da177e4
LT		 2248}
2249
2250static void
2251ixgb_restore_vlan(struct ixgb_adapter *adapter)
2252{
e2444d92
ET		 2253 u16 vid;
2254
2255 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2256 ixgb_vlan_rx_add_vid(adapter->netdev, vid);
1da177e4
LT		 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 */
0060c072
JB		 2284static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2285 enum pci_channel_state state)
01748fbb
LV		 2286{
2287 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2288 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2289
d6a1f83b
DN		 2290 netif_device_detach(netdev);
2291
2292 if (state == pci_channel_io_perm_failure)
2293 return PCI_ERS_RESULT_DISCONNECT;
2294
03f83041 2295 if (netif_running(netdev))
446490ca 2296 ixgb_down(adapter, true);
01748fbb
LV		 2297
2298 pci_disable_device(pdev);
2299
2300 /* Request a slot reset. */
2301 return PCI_ERS_RESULT_NEED_RESET;
2302}
2303
2304/**
2305 * ixgb_io_slot_reset - called after the pci bus has been reset.
2306 * @pdev pointer to pci device with error
2307 *
52035bdb 2308 * This callback is called after the PCI bus has been reset.
01748fbb
LV		 2309 * Basically, this tries to restart the card from scratch.
2310 * This is a shortened version of the device probe/discovery code,
2311 * it resembles the first-half of the ixgb_probe() routine.
2312 */
0060c072 2313static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
01748fbb
LV		 2314{
2315 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2316 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb 2317
03f83041 2318 if (pci_enable_device(pdev)) {
6909c66d
JP		 2319 netif_err(adapter, probe, adapter->netdev,
2320 "Cannot re-enable PCI device after reset\n");
01748fbb
LV		 2321 return PCI_ERS_RESULT_DISCONNECT;
2322 }
2323
2324 /* Perform card reset only on one instance of the card */
2325 if (0 != PCI_FUNC (pdev->devfn))
2326 return PCI_ERS_RESULT_RECOVERED;
2327
2328 pci_set_master(pdev);
2329
2330 netif_carrier_off(netdev);
2331 netif_stop_queue(netdev);
2332 ixgb_reset(adapter);
2333
2334 /* Make sure the EEPROM is good */
03f83041 2335 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
6909c66d
JP		 2336 netif_err(adapter, probe, adapter->netdev,
2337 "After reset, the EEPROM checksum is not valid\n");
01748fbb
LV		 2338 return PCI_ERS_RESULT_DISCONNECT;
2339 }
2340 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2341 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2342
03f83041 2343 if (!is_valid_ether_addr(netdev->perm_addr)) {
6909c66d
JP		 2344 netif_err(adapter, probe, adapter->netdev,
2345 "After reset, invalid MAC address\n");
01748fbb
LV		 2346 return PCI_ERS_RESULT_DISCONNECT;
2347 }
2348
2349 return PCI_ERS_RESULT_RECOVERED;
2350}
2351
2352/**
2353 * ixgb_io_resume - called when its OK to resume normal operations
2354 * @pdev pointer to pci device with error
2355 *
2356 * The error recovery driver tells us that its OK to resume
2357 * normal operation. Implementation resembles the second-half
2358 * of the ixgb_probe() routine.
2359 */
0060c072 2360static void ixgb_io_resume(struct pci_dev *pdev)
01748fbb
LV		 2361{
2362 struct net_device *netdev = pci_get_drvdata(pdev);
f7d4fa01 2363 struct ixgb_adapter *adapter = netdev_priv(netdev);
01748fbb
LV		 2364
2365 pci_set_master(pdev);
2366
03f83041
JB		 2367 if (netif_running(netdev)) {
2368 if (ixgb_up(adapter)) {
d328bc83 2369 pr_err("can't bring device back up after reset\n");
01748fbb
LV		 2370 return;
2371 }
2372 }
2373
2374 netif_device_attach(netdev);
2375 mod_timer(&adapter->watchdog_timer, jiffies);
2376}
2377
1da177e4 2378/* ixgb_main.c */
kernel source for telekom puls (alcatel/mediatek)