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e1000: disable CRC stripping workaround
[linux-2.6/kvm.git] / drivers / net / e1000 / e1000_main.c
bloba9e55dc10c55afade3c634032351d417143968e4
1 /*******************************************************************************
2
3
4 Copyright(c) 1999 - 2006 Intel Corporation. All rights reserved.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2 of the License, or (at your option)
9 any later version.
10
11 This program is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 more details.
15
16 You should have received a copy of the GNU General Public License along with
17 this program; if not, write to the Free Software Foundation, Inc., 59
18 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19
20 The full GNU General Public License is included in this distribution in the
21 file called LICENSE.
22
23 Contact Information:
24 Linux NICS <linux.nics@intel.com>
25 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
26 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27
28 *******************************************************************************/
29
30 #include "e1000.h"
31
32 char e1000_driver_name[] = "e1000";
33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
34 #ifndef CONFIG_E1000_NAPI
35 #define DRIVERNAPI
36 #else
37 #define DRIVERNAPI "-NAPI"
38 #endif
39 #define DRV_VERSION "7.0.38-k4"DRIVERNAPI
40 char e1000_driver_version[] = DRV_VERSION;
41 static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
42
43 /* e1000_pci_tbl - PCI Device ID Table
44 *
45 * Last entry must be all 0s
46 *
47 * Macro expands to...
48 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
49 */
50 static struct pci_device_id e1000_pci_tbl[] = {
51 INTEL_E1000_ETHERNET_DEVICE(0x1000),
52 INTEL_E1000_ETHERNET_DEVICE(0x1001),
53 INTEL_E1000_ETHERNET_DEVICE(0x1004),
54 INTEL_E1000_ETHERNET_DEVICE(0x1008),
55 INTEL_E1000_ETHERNET_DEVICE(0x1009),
56 INTEL_E1000_ETHERNET_DEVICE(0x100C),
57 INTEL_E1000_ETHERNET_DEVICE(0x100D),
58 INTEL_E1000_ETHERNET_DEVICE(0x100E),
59 INTEL_E1000_ETHERNET_DEVICE(0x100F),
60 INTEL_E1000_ETHERNET_DEVICE(0x1010),
61 INTEL_E1000_ETHERNET_DEVICE(0x1011),
62 INTEL_E1000_ETHERNET_DEVICE(0x1012),
63 INTEL_E1000_ETHERNET_DEVICE(0x1013),
64 INTEL_E1000_ETHERNET_DEVICE(0x1014),
65 INTEL_E1000_ETHERNET_DEVICE(0x1015),
66 INTEL_E1000_ETHERNET_DEVICE(0x1016),
67 INTEL_E1000_ETHERNET_DEVICE(0x1017),
68 INTEL_E1000_ETHERNET_DEVICE(0x1018),
69 INTEL_E1000_ETHERNET_DEVICE(0x1019),
70 INTEL_E1000_ETHERNET_DEVICE(0x101A),
71 INTEL_E1000_ETHERNET_DEVICE(0x101D),
72 INTEL_E1000_ETHERNET_DEVICE(0x101E),
73 INTEL_E1000_ETHERNET_DEVICE(0x1026),
74 INTEL_E1000_ETHERNET_DEVICE(0x1027),
75 INTEL_E1000_ETHERNET_DEVICE(0x1028),
76 INTEL_E1000_ETHERNET_DEVICE(0x105E),
77 INTEL_E1000_ETHERNET_DEVICE(0x105F),
78 INTEL_E1000_ETHERNET_DEVICE(0x1060),
79 INTEL_E1000_ETHERNET_DEVICE(0x1075),
80 INTEL_E1000_ETHERNET_DEVICE(0x1076),
81 INTEL_E1000_ETHERNET_DEVICE(0x1077),
82 INTEL_E1000_ETHERNET_DEVICE(0x1078),
83 INTEL_E1000_ETHERNET_DEVICE(0x1079),
84 INTEL_E1000_ETHERNET_DEVICE(0x107A),
85 INTEL_E1000_ETHERNET_DEVICE(0x107B),
86 INTEL_E1000_ETHERNET_DEVICE(0x107C),
87 INTEL_E1000_ETHERNET_DEVICE(0x107D),
88 INTEL_E1000_ETHERNET_DEVICE(0x107E),
89 INTEL_E1000_ETHERNET_DEVICE(0x107F),
90 INTEL_E1000_ETHERNET_DEVICE(0x108A),
91 INTEL_E1000_ETHERNET_DEVICE(0x108B),
92 INTEL_E1000_ETHERNET_DEVICE(0x108C),
93 INTEL_E1000_ETHERNET_DEVICE(0x1096),
94 INTEL_E1000_ETHERNET_DEVICE(0x1098),
95 INTEL_E1000_ETHERNET_DEVICE(0x1099),
96 INTEL_E1000_ETHERNET_DEVICE(0x109A),
97 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
98 INTEL_E1000_ETHERNET_DEVICE(0x10B9),
99 /* required last entry */
100 {0,}
101 };
102
103 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
104
105 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
106 struct e1000_tx_ring *txdr);
107 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
108 struct e1000_rx_ring *rxdr);
109 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
110 struct e1000_tx_ring *tx_ring);
111 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
112 struct e1000_rx_ring *rx_ring);
113
114 /* Local Function Prototypes */
115
116 static int e1000_init_module(void);
117 static void e1000_exit_module(void);
118 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
119 static void __devexit e1000_remove(struct pci_dev *pdev);
120 static int e1000_alloc_queues(struct e1000_adapter *adapter);
121 static int e1000_sw_init(struct e1000_adapter *adapter);
122 static int e1000_open(struct net_device *netdev);
123 static int e1000_close(struct net_device *netdev);
124 static void e1000_configure_tx(struct e1000_adapter *adapter);
125 static void e1000_configure_rx(struct e1000_adapter *adapter);
126 static void e1000_setup_rctl(struct e1000_adapter *adapter);
127 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
128 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
129 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
130 struct e1000_tx_ring *tx_ring);
131 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
132 struct e1000_rx_ring *rx_ring);
133 static void e1000_set_multi(struct net_device *netdev);
134 static void e1000_update_phy_info(unsigned long data);
135 static void e1000_watchdog(unsigned long data);
136 static void e1000_82547_tx_fifo_stall(unsigned long data);
137 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
138 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
139 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
140 static int e1000_set_mac(struct net_device *netdev, void *p);
141 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
142 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
143 struct e1000_tx_ring *tx_ring);
144 #ifdef CONFIG_E1000_NAPI
145 static int e1000_clean(struct net_device *poll_dev, int *budget);
146 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
147 struct e1000_rx_ring *rx_ring,
148 int *work_done, int work_to_do);
149 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
150 struct e1000_rx_ring *rx_ring,
151 int *work_done, int work_to_do);
152 #else
153 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
154 struct e1000_rx_ring *rx_ring);
155 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
156 struct e1000_rx_ring *rx_ring);
157 #endif
158 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
159 struct e1000_rx_ring *rx_ring,
160 int cleaned_count);
161 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
162 struct e1000_rx_ring *rx_ring,
163 int cleaned_count);
164 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
165 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
166 int cmd);
167 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
168 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
169 static void e1000_tx_timeout(struct net_device *dev);
170 static void e1000_reset_task(struct net_device *dev);
171 static void e1000_smartspeed(struct e1000_adapter *adapter);
172 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
173 struct sk_buff *skb);
174
175 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
176 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
177 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
178 static void e1000_restore_vlan(struct e1000_adapter *adapter);
179
180 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
181 #ifdef CONFIG_PM
182 static int e1000_resume(struct pci_dev *pdev);
183 #endif
184 static void e1000_shutdown(struct pci_dev *pdev);
185
186 #ifdef CONFIG_NET_POLL_CONTROLLER
187 /* for netdump / net console */
188 static void e1000_netpoll (struct net_device *netdev);
189 #endif
190
191 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
192 pci_channel_state_t state);
193 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
194 static void e1000_io_resume(struct pci_dev *pdev);
195
196 static struct pci_error_handlers e1000_err_handler = {
197 .error_detected = e1000_io_error_detected,
198 .slot_reset = e1000_io_slot_reset,
199 .resume = e1000_io_resume,
200 };
201
202 static struct pci_driver e1000_driver = {
203 .name = e1000_driver_name,
204 .id_table = e1000_pci_tbl,
205 .probe = e1000_probe,
206 .remove = __devexit_p(e1000_remove),
207 /* Power Managment Hooks */
208 .suspend = e1000_suspend,
209 #ifdef CONFIG_PM
210 .resume = e1000_resume,
211 #endif
212 .shutdown = e1000_shutdown,
213 .err_handler = &e1000_err_handler
214 };
215
216 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
217 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
218 MODULE_LICENSE("GPL");
219 MODULE_VERSION(DRV_VERSION);
220
221 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
222 module_param(debug, int, 0);
223 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
224
225 /**
226 * e1000_init_module - Driver Registration Routine
227 *
228 * e1000_init_module is the first routine called when the driver is
229 * loaded. All it does is register with the PCI subsystem.
230 **/
231
232 static int __init
233 e1000_init_module(void)
234 {
235 int ret;
236 printk(KERN_INFO "%s - version %s\n",
237 e1000_driver_string, e1000_driver_version);
238
239 printk(KERN_INFO "%s\n", e1000_copyright);
240
241 ret = pci_module_init(&e1000_driver);
242
243 return ret;
244 }
245
246 module_init(e1000_init_module);
247
248 /**
249 * e1000_exit_module - Driver Exit Cleanup Routine
250 *
251 * e1000_exit_module is called just before the driver is removed
252 * from memory.
253 **/
254
255 static void __exit
256 e1000_exit_module(void)
257 {
258 pci_unregister_driver(&e1000_driver);
259 }
260
261 module_exit(e1000_exit_module);
262
263 static int e1000_request_irq(struct e1000_adapter *adapter)
264 {
265 struct net_device *netdev = adapter->netdev;
266 int flags, err = 0;
267
268 flags = SA_SHIRQ | SA_SAMPLE_RANDOM;
269 #ifdef CONFIG_PCI_MSI
270 if (adapter->hw.mac_type > e1000_82547_rev_2) {
271 adapter->have_msi = TRUE;
272 if ((err = pci_enable_msi(adapter->pdev))) {
273 DPRINTK(PROBE, ERR,
274 "Unable to allocate MSI interrupt Error: %d\n", err);
275 adapter->have_msi = FALSE;
276 }
277 }
278 if (adapter->have_msi)
279 flags &= ~SA_SHIRQ;
280 #endif
281 if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
282 netdev->name, netdev)))
283 DPRINTK(PROBE, ERR,
284 "Unable to allocate interrupt Error: %d\n", err);
285
286 return err;
287 }
288
289 static void e1000_free_irq(struct e1000_adapter *adapter)
290 {
291 struct net_device *netdev = adapter->netdev;
292
293 free_irq(adapter->pdev->irq, netdev);
294
295 #ifdef CONFIG_PCI_MSI
296 if (adapter->have_msi)
297 pci_disable_msi(adapter->pdev);
298 #endif
299 }
300
301 /**
302 * e1000_irq_disable - Mask off interrupt generation on the NIC
303 * @adapter: board private structure
304 **/
305
306 static void
307 e1000_irq_disable(struct e1000_adapter *adapter)
308 {
309 atomic_inc(&adapter->irq_sem);
310 E1000_WRITE_REG(&adapter->hw, IMC, ~0);
311 E1000_WRITE_FLUSH(&adapter->hw);
312 synchronize_irq(adapter->pdev->irq);
313 }
314
315 /**
316 * e1000_irq_enable - Enable default interrupt generation settings
317 * @adapter: board private structure
318 **/
319
320 static void
321 e1000_irq_enable(struct e1000_adapter *adapter)
322 {
323 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
324 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
325 E1000_WRITE_FLUSH(&adapter->hw);
326 }
327 }
328
329 static void
330 e1000_update_mng_vlan(struct e1000_adapter *adapter)
331 {
332 struct net_device *netdev = adapter->netdev;
333 uint16_t vid = adapter->hw.mng_cookie.vlan_id;
334 uint16_t old_vid = adapter->mng_vlan_id;
335 if (adapter->vlgrp) {
336 if (!adapter->vlgrp->vlan_devices[vid]) {
337 if (adapter->hw.mng_cookie.status &
338 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
339 e1000_vlan_rx_add_vid(netdev, vid);
340 adapter->mng_vlan_id = vid;
341 } else
342 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
343
344 if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
345 (vid != old_vid) &&
346 !adapter->vlgrp->vlan_devices[old_vid])
347 e1000_vlan_rx_kill_vid(netdev, old_vid);
348 } else
349 adapter->mng_vlan_id = vid;
350 }
351 }
352
353 /**
354 * e1000_release_hw_control - release control of the h/w to f/w
355 * @adapter: address of board private structure
356 *
357 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
358 * For ASF and Pass Through versions of f/w this means that the
359 * driver is no longer loaded. For AMT version (only with 82573) i
360 * of the f/w this means that the netowrk i/f is closed.
361 *
362 **/
363
364 static void
365 e1000_release_hw_control(struct e1000_adapter *adapter)
366 {
367 uint32_t ctrl_ext;
368 uint32_t swsm;
369
370 /* Let firmware taken over control of h/w */
371 switch (adapter->hw.mac_type) {
372 case e1000_82571:
373 case e1000_82572:
374 case e1000_80003es2lan:
375 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
376 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
377 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
378 break;
379 case e1000_82573:
380 swsm = E1000_READ_REG(&adapter->hw, SWSM);
381 E1000_WRITE_REG(&adapter->hw, SWSM,
382 swsm & ~E1000_SWSM_DRV_LOAD);
383 default:
384 break;
385 }
386 }
387
388 /**
389 * e1000_get_hw_control - get control of the h/w from f/w
390 * @adapter: address of board private structure
391 *
392 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
393 * For ASF and Pass Through versions of f/w this means that
394 * the driver is loaded. For AMT version (only with 82573)
395 * of the f/w this means that the netowrk i/f is open.
396 *
397 **/
398
399 static void
400 e1000_get_hw_control(struct e1000_adapter *adapter)
401 {
402 uint32_t ctrl_ext;
403 uint32_t swsm;
404 /* Let firmware know the driver has taken over */
405 switch (adapter->hw.mac_type) {
406 case e1000_82571:
407 case e1000_82572:
408 case e1000_80003es2lan:
409 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
410 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
411 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
412 break;
413 case e1000_82573:
414 swsm = E1000_READ_REG(&adapter->hw, SWSM);
415 E1000_WRITE_REG(&adapter->hw, SWSM,
416 swsm | E1000_SWSM_DRV_LOAD);
417 break;
418 default:
419 break;
420 }
421 }
422
423 int
424 e1000_up(struct e1000_adapter *adapter)
425 {
426 struct net_device *netdev = adapter->netdev;
427 int i;
428
429 /* hardware has been reset, we need to reload some things */
430
431 e1000_set_multi(netdev);
432
433 e1000_restore_vlan(adapter);
434
435 e1000_configure_tx(adapter);
436 e1000_setup_rctl(adapter);
437 e1000_configure_rx(adapter);
438 /* call E1000_DESC_UNUSED which always leaves
439 * at least 1 descriptor unused to make sure
440 * next_to_use != next_to_clean */
441 for (i = 0; i < adapter->num_rx_queues; i++) {
442 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
443 adapter->alloc_rx_buf(adapter, ring,
444 E1000_DESC_UNUSED(ring));
445 }
446
447 adapter->tx_queue_len = netdev->tx_queue_len;
448
449 mod_timer(&adapter->watchdog_timer, jiffies);
450
451 #ifdef CONFIG_E1000_NAPI
452 netif_poll_enable(netdev);
453 #endif
454 e1000_irq_enable(adapter);
455
456 return 0;
457 }
458
459 /**
460 * e1000_power_up_phy - restore link in case the phy was powered down
461 * @adapter: address of board private structure
462 *
463 * The phy may be powered down to save power and turn off link when the
464 * driver is unloaded and wake on lan is not enabled (among others)
465 * *** this routine MUST be followed by a call to e1000_reset ***
466 *
467 **/
468
469 static void e1000_power_up_phy(struct e1000_adapter *adapter)
470 {
471 uint16_t mii_reg = 0;
472
473 /* Just clear the power down bit to wake the phy back up */
474 if (adapter->hw.media_type == e1000_media_type_copper) {
475 /* according to the manual, the phy will retain its
476 * settings across a power-down/up cycle */
477 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
478 mii_reg &= ~MII_CR_POWER_DOWN;
479 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
480 }
481 }
482
483 static void e1000_power_down_phy(struct e1000_adapter *adapter)
484 {
485 boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
486 e1000_check_mng_mode(&adapter->hw);
487 /* Power down the PHY so no link is implied when interface is down
488 * The PHY cannot be powered down if any of the following is TRUE
489 * (a) WoL is enabled
490 * (b) AMT is active
491 * (c) SoL/IDER session is active */
492 if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
493 adapter->hw.media_type == e1000_media_type_copper &&
494 !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
495 !mng_mode_enabled &&
496 !e1000_check_phy_reset_block(&adapter->hw)) {
497 uint16_t mii_reg = 0;
498 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
499 mii_reg |= MII_CR_POWER_DOWN;
500 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
501 mdelay(1);
502 }
503 }
504
505 void
506 e1000_down(struct e1000_adapter *adapter)
507 {
508 struct net_device *netdev = adapter->netdev;
509
510 e1000_irq_disable(adapter);
511
512 del_timer_sync(&adapter->tx_fifo_stall_timer);
513 del_timer_sync(&adapter->watchdog_timer);
514 del_timer_sync(&adapter->phy_info_timer);
515
516 #ifdef CONFIG_E1000_NAPI
517 netif_poll_disable(netdev);
518 #endif
519 netdev->tx_queue_len = adapter->tx_queue_len;
520 adapter->link_speed = 0;
521 adapter->link_duplex = 0;
522 netif_carrier_off(netdev);
523 netif_stop_queue(netdev);
524
525 e1000_reset(adapter);
526 e1000_clean_all_tx_rings(adapter);
527 e1000_clean_all_rx_rings(adapter);
528 }
529
530 void
531 e1000_reinit_locked(struct e1000_adapter *adapter)
532 {
533 WARN_ON(in_interrupt());
534 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
535 msleep(1);
536 e1000_down(adapter);
537 e1000_up(adapter);
538 clear_bit(__E1000_RESETTING, &adapter->flags);
539 }
540
541 void
542 e1000_reset(struct e1000_adapter *adapter)
543 {
544 uint32_t pba, manc;
545 uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
546
547 /* Repartition Pba for greater than 9k mtu
548 * To take effect CTRL.RST is required.
549 */
550
551 switch (adapter->hw.mac_type) {
552 case e1000_82547:
553 case e1000_82547_rev_2:
554 pba = E1000_PBA_30K;
555 break;
556 case e1000_82571:
557 case e1000_82572:
558 case e1000_80003es2lan:
559 pba = E1000_PBA_38K;
560 break;
561 case e1000_82573:
562 pba = E1000_PBA_12K;
563 break;
564 default:
565 pba = E1000_PBA_48K;
566 break;
567 }
568
569 if ((adapter->hw.mac_type != e1000_82573) &&
570 (adapter->netdev->mtu > E1000_RXBUFFER_8192))
571 pba -= 8; /* allocate more FIFO for Tx */
572
573
574 if (adapter->hw.mac_type == e1000_82547) {
575 adapter->tx_fifo_head = 0;
576 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
577 adapter->tx_fifo_size =
578 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
579 atomic_set(&adapter->tx_fifo_stall, 0);
580 }
581
582 E1000_WRITE_REG(&adapter->hw, PBA, pba);
583
584 /* flow control settings */
585 /* Set the FC high water mark to 90% of the FIFO size.
586 * Required to clear last 3 LSB */
587 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
588
589 adapter->hw.fc_high_water = fc_high_water_mark;
590 adapter->hw.fc_low_water = fc_high_water_mark - 8;
591 if (adapter->hw.mac_type == e1000_80003es2lan)
592 adapter->hw.fc_pause_time = 0xFFFF;
593 else
594 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
595 adapter->hw.fc_send_xon = 1;
596 adapter->hw.fc = adapter->hw.original_fc;
597
598 /* Allow time for pending master requests to run */
599 e1000_reset_hw(&adapter->hw);
600 if (adapter->hw.mac_type >= e1000_82544)
601 E1000_WRITE_REG(&adapter->hw, WUC, 0);
602 if (e1000_init_hw(&adapter->hw))
603 DPRINTK(PROBE, ERR, "Hardware Error\n");
604 e1000_update_mng_vlan(adapter);
605 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
606 E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
607
608 e1000_reset_adaptive(&adapter->hw);
609 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
610
611 if (!adapter->smart_power_down &&
612 (adapter->hw.mac_type == e1000_82571 ||
613 adapter->hw.mac_type == e1000_82572)) {
614 uint16_t phy_data = 0;
615 /* speed up time to link by disabling smart power down, ignore
616 * the return value of this function because there is nothing
617 * different we would do if it failed */
618 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
619 &phy_data);
620 phy_data &= ~IGP02E1000_PM_SPD;
621 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
622 phy_data);
623 }
624
625 if (adapter->en_mng_pt) {
626 manc = E1000_READ_REG(&adapter->hw, MANC);
627 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
628 E1000_WRITE_REG(&adapter->hw, MANC, manc);
629 }
630 }
631
632 /**
633 * e1000_probe - Device Initialization Routine
634 * @pdev: PCI device information struct
635 * @ent: entry in e1000_pci_tbl
636 *
637 * Returns 0 on success, negative on failure
638 *
639 * e1000_probe initializes an adapter identified by a pci_dev structure.
640 * The OS initialization, configuring of the adapter private structure,
641 * and a hardware reset occur.
642 **/
643
644 static int __devinit
645 e1000_probe(struct pci_dev *pdev,
646 const struct pci_device_id *ent)
647 {
648 struct net_device *netdev;
649 struct e1000_adapter *adapter;
650 unsigned long mmio_start, mmio_len;
651
652 static int cards_found = 0;
653 static int e1000_ksp3_port_a = 0; /* global ksp3 port a indication */
654 int i, err, pci_using_dac;
655 uint16_t eeprom_data;
656 uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
657 if ((err = pci_enable_device(pdev)))
658 return err;
659
660 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
661 pci_using_dac = 1;
662 } else {
663 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
664 E1000_ERR("No usable DMA configuration, aborting\n");
665 return err;
666 }
667 pci_using_dac = 0;
668 }
669
670 if ((err = pci_request_regions(pdev, e1000_driver_name)))
671 return err;
672
673 pci_set_master(pdev);
674
675 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
676 if (!netdev) {
677 err = -ENOMEM;
678 goto err_alloc_etherdev;
679 }
680
681 SET_MODULE_OWNER(netdev);
682 SET_NETDEV_DEV(netdev, &pdev->dev);
683
684 pci_set_drvdata(pdev, netdev);
685 adapter = netdev_priv(netdev);
686 adapter->netdev = netdev;
687 adapter->pdev = pdev;
688 adapter->hw.back = adapter;
689 adapter->msg_enable = (1 << debug) - 1;
690
691 mmio_start = pci_resource_start(pdev, BAR_0);
692 mmio_len = pci_resource_len(pdev, BAR_0);
693
694 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
695 if (!adapter->hw.hw_addr) {
696 err = -EIO;
697 goto err_ioremap;
698 }
699
700 for (i = BAR_1; i <= BAR_5; i++) {
701 if (pci_resource_len(pdev, i) == 0)
702 continue;
703 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
704 adapter->hw.io_base = pci_resource_start(pdev, i);
705 break;
706 }
707 }
708
709 netdev->open = &e1000_open;
710 netdev->stop = &e1000_close;
711 netdev->hard_start_xmit = &e1000_xmit_frame;
712 netdev->get_stats = &e1000_get_stats;
713 netdev->set_multicast_list = &e1000_set_multi;
714 netdev->set_mac_address = &e1000_set_mac;
715 netdev->change_mtu = &e1000_change_mtu;
716 netdev->do_ioctl = &e1000_ioctl;
717 e1000_set_ethtool_ops(netdev);
718 netdev->tx_timeout = &e1000_tx_timeout;
719 netdev->watchdog_timeo = 5 * HZ;
720 #ifdef CONFIG_E1000_NAPI
721 netdev->poll = &e1000_clean;
722 netdev->weight = 64;
723 #endif
724 netdev->vlan_rx_register = e1000_vlan_rx_register;
725 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
726 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
727 #ifdef CONFIG_NET_POLL_CONTROLLER
728 netdev->poll_controller = e1000_netpoll;
729 #endif
730 strcpy(netdev->name, pci_name(pdev));
731
732 netdev->mem_start = mmio_start;
733 netdev->mem_end = mmio_start + mmio_len;
734 netdev->base_addr = adapter->hw.io_base;
735
736 adapter->bd_number = cards_found;
737
738 /* setup the private structure */
739
740 if ((err = e1000_sw_init(adapter)))
741 goto err_sw_init;
742
743 if ((err = e1000_check_phy_reset_block(&adapter->hw)))
744 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
745
746 /* if ksp3, indicate if it's port a being setup */
747 if (pdev->device == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3 &&
748 e1000_ksp3_port_a == 0)
749 adapter->ksp3_port_a = 1;
750 e1000_ksp3_port_a++;
751 /* Reset for multiple KP3 adapters */
752 if (e1000_ksp3_port_a == 4)
753 e1000_ksp3_port_a = 0;
754
755 if (adapter->hw.mac_type >= e1000_82543) {
756 netdev->features = NETIF_F_SG |
757 NETIF_F_HW_CSUM |
758 NETIF_F_HW_VLAN_TX |
759 NETIF_F_HW_VLAN_RX |
760 NETIF_F_HW_VLAN_FILTER;
761 }
762
763 #ifdef NETIF_F_TSO
764 if ((adapter->hw.mac_type >= e1000_82544) &&
765 (adapter->hw.mac_type != e1000_82547))
766 netdev->features |= NETIF_F_TSO;
767
768 #ifdef NETIF_F_TSO_IPV6
769 if (adapter->hw.mac_type > e1000_82547_rev_2)
770 netdev->features |= NETIF_F_TSO_IPV6;
771 #endif
772 #endif
773 if (pci_using_dac)
774 netdev->features |= NETIF_F_HIGHDMA;
775
776 /* hard_start_xmit is safe against parallel locking */
777 netdev->features |= NETIF_F_LLTX;
778
779 adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
780
781 /* before reading the EEPROM, reset the controller to
782 * put the device in a known good starting state */
783
784 e1000_reset_hw(&adapter->hw);
785
786 /* make sure the EEPROM is good */
787
788 if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
789 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
790 err = -EIO;
791 goto err_eeprom;
792 }
793
794 /* copy the MAC address out of the EEPROM */
795
796 if (e1000_read_mac_addr(&adapter->hw))
797 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
798 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
799 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
800
801 if (!is_valid_ether_addr(netdev->perm_addr)) {
802 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
803 err = -EIO;
804 goto err_eeprom;
805 }
806
807 e1000_read_part_num(&adapter->hw, &(adapter->part_num));
808
809 e1000_get_bus_info(&adapter->hw);
810
811 init_timer(&adapter->tx_fifo_stall_timer);
812 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
813 adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
814
815 init_timer(&adapter->watchdog_timer);
816 adapter->watchdog_timer.function = &e1000_watchdog;
817 adapter->watchdog_timer.data = (unsigned long) adapter;
818
819 init_timer(&adapter->phy_info_timer);
820 adapter->phy_info_timer.function = &e1000_update_phy_info;
821 adapter->phy_info_timer.data = (unsigned long) adapter;
822
823 INIT_WORK(&adapter->reset_task,
824 (void (*)(void *))e1000_reset_task, netdev);
825
826 /* we're going to reset, so assume we have no link for now */
827
828 netif_carrier_off(netdev);
829 netif_stop_queue(netdev);
830
831 e1000_check_options(adapter);
832
833 /* Initial Wake on LAN setting
834 * If APM wake is enabled in the EEPROM,
835 * enable the ACPI Magic Packet filter
836 */
837
838 switch (adapter->hw.mac_type) {
839 case e1000_82542_rev2_0:
840 case e1000_82542_rev2_1:
841 case e1000_82543:
842 break;
843 case e1000_82544:
844 e1000_read_eeprom(&adapter->hw,
845 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
846 eeprom_apme_mask = E1000_EEPROM_82544_APM;
847 break;
848 case e1000_82546:
849 case e1000_82546_rev_3:
850 case e1000_82571:
851 case e1000_80003es2lan:
852 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
853 e1000_read_eeprom(&adapter->hw,
854 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
855 break;
856 }
857 /* Fall Through */
858 default:
859 e1000_read_eeprom(&adapter->hw,
860 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
861 break;
862 }
863 if (eeprom_data & eeprom_apme_mask)
864 adapter->wol |= E1000_WUFC_MAG;
865
866 /* print bus type/speed/width info */
867 {
868 struct e1000_hw *hw = &adapter->hw;
869 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
870 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
871 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
872 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
873 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
874 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
875 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
876 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
877 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
878 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
879 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
880 "32-bit"));
881 }
882
883 for (i = 0; i < 6; i++)
884 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
885
886 /* reset the hardware with the new settings */
887 e1000_reset(adapter);
888
889 /* If the controller is 82573 and f/w is AMT, do not set
890 * DRV_LOAD until the interface is up. For all other cases,
891 * let the f/w know that the h/w is now under the control
892 * of the driver. */
893 if (adapter->hw.mac_type != e1000_82573 ||
894 !e1000_check_mng_mode(&adapter->hw))
895 e1000_get_hw_control(adapter);
896
897 strcpy(netdev->name, "eth%d");
898 if ((err = register_netdev(netdev)))
899 goto err_register;
900
901 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
902
903 cards_found++;
904 return 0;
905
906 err_register:
907 err_sw_init:
908 err_eeprom:
909 iounmap(adapter->hw.hw_addr);
910 err_ioremap:
911 free_netdev(netdev);
912 err_alloc_etherdev:
913 pci_release_regions(pdev);
914 return err;
915 }
916
917 /**
918 * e1000_remove - Device Removal Routine
919 * @pdev: PCI device information struct
920 *
921 * e1000_remove is called by the PCI subsystem to alert the driver
922 * that it should release a PCI device. The could be caused by a
923 * Hot-Plug event, or because the driver is going to be removed from
924 * memory.
925 **/
926
927 static void __devexit
928 e1000_remove(struct pci_dev *pdev)
929 {
930 struct net_device *netdev = pci_get_drvdata(pdev);
931 struct e1000_adapter *adapter = netdev_priv(netdev);
932 uint32_t manc;
933 #ifdef CONFIG_E1000_NAPI
934 int i;
935 #endif
936
937 flush_scheduled_work();
938
939 if (adapter->hw.mac_type >= e1000_82540 &&
940 adapter->hw.media_type == e1000_media_type_copper) {
941 manc = E1000_READ_REG(&adapter->hw, MANC);
942 if (manc & E1000_MANC_SMBUS_EN) {
943 manc |= E1000_MANC_ARP_EN;
944 E1000_WRITE_REG(&adapter->hw, MANC, manc);
945 }
946 }
947
948 /* Release control of h/w to f/w. If f/w is AMT enabled, this
949 * would have already happened in close and is redundant. */
950 e1000_release_hw_control(adapter);
951
952 unregister_netdev(netdev);
953 #ifdef CONFIG_E1000_NAPI
954 for (i = 0; i < adapter->num_rx_queues; i++)
955 dev_put(&adapter->polling_netdev[i]);
956 #endif
957
958 if (!e1000_check_phy_reset_block(&adapter->hw))
959 e1000_phy_hw_reset(&adapter->hw);
960
961 kfree(adapter->tx_ring);
962 kfree(adapter->rx_ring);
963 #ifdef CONFIG_E1000_NAPI
964 kfree(adapter->polling_netdev);
965 #endif
966
967 iounmap(adapter->hw.hw_addr);
968 pci_release_regions(pdev);
969
970 free_netdev(netdev);
971
972 pci_disable_device(pdev);
973 }
974
975 /**
976 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
977 * @adapter: board private structure to initialize
978 *
979 * e1000_sw_init initializes the Adapter private data structure.
980 * Fields are initialized based on PCI device information and
981 * OS network device settings (MTU size).
982 **/
983
984 static int __devinit
985 e1000_sw_init(struct e1000_adapter *adapter)
986 {
987 struct e1000_hw *hw = &adapter->hw;
988 struct net_device *netdev = adapter->netdev;
989 struct pci_dev *pdev = adapter->pdev;
990 #ifdef CONFIG_E1000_NAPI
991 int i;
992 #endif
993
994 /* PCI config space info */
995
996 hw->vendor_id = pdev->vendor;
997 hw->device_id = pdev->device;
998 hw->subsystem_vendor_id = pdev->subsystem_vendor;
999 hw->subsystem_id = pdev->subsystem_device;
1000
1001 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1002
1003 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1004
1005 adapter->rx_buffer_len = MAXIMUM_ETHERNET_FRAME_SIZE;
1006 adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1007 hw->max_frame_size = netdev->mtu +
1008 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1009 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1010
1011 /* identify the MAC */
1012
1013 if (e1000_set_mac_type(hw)) {
1014 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1015 return -EIO;
1016 }
1017
1018 /* initialize eeprom parameters */
1019
1020 if (e1000_init_eeprom_params(hw)) {
1021 E1000_ERR("EEPROM initialization failed\n");
1022 return -EIO;
1023 }
1024
1025 switch (hw->mac_type) {
1026 default:
1027 break;
1028 case e1000_82541:
1029 case e1000_82547:
1030 case e1000_82541_rev_2:
1031 case e1000_82547_rev_2:
1032 hw->phy_init_script = 1;
1033 break;
1034 }
1035
1036 e1000_set_media_type(hw);
1037
1038 hw->wait_autoneg_complete = FALSE;
1039 hw->tbi_compatibility_en = TRUE;
1040 hw->adaptive_ifs = TRUE;
1041
1042 /* Copper options */
1043
1044 if (hw->media_type == e1000_media_type_copper) {
1045 hw->mdix = AUTO_ALL_MODES;
1046 hw->disable_polarity_correction = FALSE;
1047 hw->master_slave = E1000_MASTER_SLAVE;
1048 }
1049
1050 adapter->num_tx_queues = 1;
1051 adapter->num_rx_queues = 1;
1052
1053 if (e1000_alloc_queues(adapter)) {
1054 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1055 return -ENOMEM;
1056 }
1057
1058 #ifdef CONFIG_E1000_NAPI
1059 for (i = 0; i < adapter->num_rx_queues; i++) {
1060 adapter->polling_netdev[i].priv = adapter;
1061 adapter->polling_netdev[i].poll = &e1000_clean;
1062 adapter->polling_netdev[i].weight = 64;
1063 dev_hold(&adapter->polling_netdev[i]);
1064 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1065 }
1066 spin_lock_init(&adapter->tx_queue_lock);
1067 #endif
1068
1069 atomic_set(&adapter->irq_sem, 1);
1070 spin_lock_init(&adapter->stats_lock);
1071
1072 return 0;
1073 }
1074
1075 /**
1076 * e1000_alloc_queues - Allocate memory for all rings
1077 * @adapter: board private structure to initialize
1078 *
1079 * We allocate one ring per queue at run-time since we don't know the
1080 * number of queues at compile-time. The polling_netdev array is
1081 * intended for Multiqueue, but should work fine with a single queue.
1082 **/
1083
1084 static int __devinit
1085 e1000_alloc_queues(struct e1000_adapter *adapter)
1086 {
1087 int size;
1088
1089 size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1090 adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1091 if (!adapter->tx_ring)
1092 return -ENOMEM;
1093 memset(adapter->tx_ring, 0, size);
1094
1095 size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1096 adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1097 if (!adapter->rx_ring) {
1098 kfree(adapter->tx_ring);
1099 return -ENOMEM;
1100 }
1101 memset(adapter->rx_ring, 0, size);
1102
1103 #ifdef CONFIG_E1000_NAPI
1104 size = sizeof(struct net_device) * adapter->num_rx_queues;
1105 adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1106 if (!adapter->polling_netdev) {
1107 kfree(adapter->tx_ring);
1108 kfree(adapter->rx_ring);
1109 return -ENOMEM;
1110 }
1111 memset(adapter->polling_netdev, 0, size);
1112 #endif
1113
1114 return E1000_SUCCESS;
1115 }
1116
1117 /**
1118 * e1000_open - Called when a network interface is made active
1119 * @netdev: network interface device structure
1120 *
1121 * Returns 0 on success, negative value on failure
1122 *
1123 * The open entry point is called when a network interface is made
1124 * active by the system (IFF_UP). At this point all resources needed
1125 * for transmit and receive operations are allocated, the interrupt
1126 * handler is registered with the OS, the watchdog timer is started,
1127 * and the stack is notified that the interface is ready.
1128 **/
1129
1130 static int
1131 e1000_open(struct net_device *netdev)
1132 {
1133 struct e1000_adapter *adapter = netdev_priv(netdev);
1134 int err;
1135
1136 /* disallow open during test */
1137 if (test_bit(__E1000_DRIVER_TESTING, &adapter->flags))
1138 return -EBUSY;
1139
1140 /* allocate transmit descriptors */
1141
1142 if ((err = e1000_setup_all_tx_resources(adapter)))
1143 goto err_setup_tx;
1144
1145 /* allocate receive descriptors */
1146
1147 if ((err = e1000_setup_all_rx_resources(adapter)))
1148 goto err_setup_rx;
1149
1150 err = e1000_request_irq(adapter);
1151 if (err)
1152 goto err_up;
1153
1154 e1000_power_up_phy(adapter);
1155
1156 if ((err = e1000_up(adapter)))
1157 goto err_up;
1158 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1159 if ((adapter->hw.mng_cookie.status &
1160 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1161 e1000_update_mng_vlan(adapter);
1162 }
1163
1164 /* If AMT is enabled, let the firmware know that the network
1165 * interface is now open */
1166 if (adapter->hw.mac_type == e1000_82573 &&
1167 e1000_check_mng_mode(&adapter->hw))
1168 e1000_get_hw_control(adapter);
1169
1170 return E1000_SUCCESS;
1171
1172 err_up:
1173 e1000_free_all_rx_resources(adapter);
1174 err_setup_rx:
1175 e1000_free_all_tx_resources(adapter);
1176 err_setup_tx:
1177 e1000_reset(adapter);
1178
1179 return err;
1180 }
1181
1182 /**
1183 * e1000_close - Disables a network interface
1184 * @netdev: network interface device structure
1185 *
1186 * Returns 0, this is not allowed to fail
1187 *
1188 * The close entry point is called when an interface is de-activated
1189 * by the OS. The hardware is still under the drivers control, but
1190 * needs to be disabled. A global MAC reset is issued to stop the
1191 * hardware, and all transmit and receive resources are freed.
1192 **/
1193
1194 static int
1195 e1000_close(struct net_device *netdev)
1196 {
1197 struct e1000_adapter *adapter = netdev_priv(netdev);
1198
1199 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1200 e1000_down(adapter);
1201 e1000_power_down_phy(adapter);
1202 e1000_free_irq(adapter);
1203
1204 e1000_free_all_tx_resources(adapter);
1205 e1000_free_all_rx_resources(adapter);
1206
1207 if ((adapter->hw.mng_cookie.status &
1208 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1209 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1210 }
1211
1212 /* If AMT is enabled, let the firmware know that the network
1213 * interface is now closed */
1214 if (adapter->hw.mac_type == e1000_82573 &&
1215 e1000_check_mng_mode(&adapter->hw))
1216 e1000_release_hw_control(adapter);
1217
1218 return 0;
1219 }
1220
1221 /**
1222 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1223 * @adapter: address of board private structure
1224 * @start: address of beginning of memory
1225 * @len: length of memory
1226 **/
1227 static boolean_t
1228 e1000_check_64k_bound(struct e1000_adapter *adapter,
1229 void *start, unsigned long len)
1230 {
1231 unsigned long begin = (unsigned long) start;
1232 unsigned long end = begin + len;
1233
1234 /* First rev 82545 and 82546 need to not allow any memory
1235 * write location to cross 64k boundary due to errata 23 */
1236 if (adapter->hw.mac_type == e1000_82545 ||
1237 adapter->hw.mac_type == e1000_82546) {
1238 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1239 }
1240
1241 return TRUE;
1242 }
1243
1244 /**
1245 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1246 * @adapter: board private structure
1247 * @txdr: tx descriptor ring (for a specific queue) to setup
1248 *
1249 * Return 0 on success, negative on failure
1250 **/
1251
1252 static int
1253 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1254 struct e1000_tx_ring *txdr)
1255 {
1256 struct pci_dev *pdev = adapter->pdev;
1257 int size;
1258
1259 size = sizeof(struct e1000_buffer) * txdr->count;
1260
1261 txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1262 if (!txdr->buffer_info) {
1263 DPRINTK(PROBE, ERR,
1264 "Unable to allocate memory for the transmit descriptor ring\n");
1265 return -ENOMEM;
1266 }
1267 memset(txdr->buffer_info, 0, size);
1268
1269 /* round up to nearest 4K */
1270
1271 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1272 E1000_ROUNDUP(txdr->size, 4096);
1273
1274 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1275 if (!txdr->desc) {
1276 setup_tx_desc_die:
1277 vfree(txdr->buffer_info);
1278 DPRINTK(PROBE, ERR,
1279 "Unable to allocate memory for the transmit descriptor ring\n");
1280 return -ENOMEM;
1281 }
1282
1283 /* Fix for errata 23, can't cross 64kB boundary */
1284 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1285 void *olddesc = txdr->desc;
1286 dma_addr_t olddma = txdr->dma;
1287 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1288 "at %p\n", txdr->size, txdr->desc);
1289 /* Try again, without freeing the previous */
1290 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1291 /* Failed allocation, critical failure */
1292 if (!txdr->desc) {
1293 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1294 goto setup_tx_desc_die;
1295 }
1296
1297 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1298 /* give up */
1299 pci_free_consistent(pdev, txdr->size, txdr->desc,
1300 txdr->dma);
1301 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1302 DPRINTK(PROBE, ERR,
1303 "Unable to allocate aligned memory "
1304 "for the transmit descriptor ring\n");
1305 vfree(txdr->buffer_info);
1306 return -ENOMEM;
1307 } else {
1308 /* Free old allocation, new allocation was successful */
1309 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1310 }
1311 }
1312 memset(txdr->desc, 0, txdr->size);
1313
1314 txdr->next_to_use = 0;
1315 txdr->next_to_clean = 0;
1316 spin_lock_init(&txdr->tx_lock);
1317
1318 return 0;
1319 }
1320
1321 /**
1322 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1323 * (Descriptors) for all queues
1324 * @adapter: board private structure
1325 *
1326 * If this function returns with an error, then it's possible one or
1327 * more of the rings is populated (while the rest are not). It is the
1328 * callers duty to clean those orphaned rings.
1329 *
1330 * Return 0 on success, negative on failure
1331 **/
1332
1333 int
1334 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1335 {
1336 int i, err = 0;
1337
1338 for (i = 0; i < adapter->num_tx_queues; i++) {
1339 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1340 if (err) {
1341 DPRINTK(PROBE, ERR,
1342 "Allocation for Tx Queue %u failed\n", i);
1343 break;
1344 }
1345 }
1346
1347 return err;
1348 }
1349
1350 /**
1351 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1352 * @adapter: board private structure
1353 *
1354 * Configure the Tx unit of the MAC after a reset.
1355 **/
1356
1357 static void
1358 e1000_configure_tx(struct e1000_adapter *adapter)
1359 {
1360 uint64_t tdba;
1361 struct e1000_hw *hw = &adapter->hw;
1362 uint32_t tdlen, tctl, tipg, tarc;
1363 uint32_t ipgr1, ipgr2;
1364
1365 /* Setup the HW Tx Head and Tail descriptor pointers */
1366
1367 switch (adapter->num_tx_queues) {
1368 case 1:
1369 default:
1370 tdba = adapter->tx_ring[0].dma;
1371 tdlen = adapter->tx_ring[0].count *
1372 sizeof(struct e1000_tx_desc);
1373 E1000_WRITE_REG(hw, TDLEN, tdlen);
1374 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1375 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1376 E1000_WRITE_REG(hw, TDT, 0);
1377 E1000_WRITE_REG(hw, TDH, 0);
1378 adapter->tx_ring[0].tdh = E1000_TDH;
1379 adapter->tx_ring[0].tdt = E1000_TDT;
1380 break;
1381 }
1382
1383 /* Set the default values for the Tx Inter Packet Gap timer */
1384
1385 if (hw->media_type == e1000_media_type_fiber ||
1386 hw->media_type == e1000_media_type_internal_serdes)
1387 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1388 else
1389 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1390
1391 switch (hw->mac_type) {
1392 case e1000_82542_rev2_0:
1393 case e1000_82542_rev2_1:
1394 tipg = DEFAULT_82542_TIPG_IPGT;
1395 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1396 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1397 break;
1398 case e1000_80003es2lan:
1399 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1400 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1401 break;
1402 default:
1403 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1404 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1405 break;
1406 }
1407 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1408 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1409 E1000_WRITE_REG(hw, TIPG, tipg);
1410
1411 /* Set the Tx Interrupt Delay register */
1412
1413 E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1414 if (hw->mac_type >= e1000_82540)
1415 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1416
1417 /* Program the Transmit Control Register */
1418
1419 tctl = E1000_READ_REG(hw, TCTL);
1420
1421 tctl &= ~E1000_TCTL_CT;
1422 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1423 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1424
1425 #ifdef DISABLE_MULR
1426 /* disable Multiple Reads for debugging */
1427 tctl &= ~E1000_TCTL_MULR;
1428 #endif
1429
1430 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1431 tarc = E1000_READ_REG(hw, TARC0);
1432 tarc |= ((1 << 25) | (1 << 21));
1433 E1000_WRITE_REG(hw, TARC0, tarc);
1434 tarc = E1000_READ_REG(hw, TARC1);
1435 tarc |= (1 << 25);
1436 if (tctl & E1000_TCTL_MULR)
1437 tarc &= ~(1 << 28);
1438 else
1439 tarc |= (1 << 28);
1440 E1000_WRITE_REG(hw, TARC1, tarc);
1441 } else if (hw->mac_type == e1000_80003es2lan) {
1442 tarc = E1000_READ_REG(hw, TARC0);
1443 tarc |= 1;
1444 if (hw->media_type == e1000_media_type_internal_serdes)
1445 tarc |= (1 << 20);
1446 E1000_WRITE_REG(hw, TARC0, tarc);
1447 tarc = E1000_READ_REG(hw, TARC1);
1448 tarc |= 1;
1449 E1000_WRITE_REG(hw, TARC1, tarc);
1450 }
1451
1452 e1000_config_collision_dist(hw);
1453
1454 /* Setup Transmit Descriptor Settings for eop descriptor */
1455 adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1456 E1000_TXD_CMD_IFCS;
1457
1458 if (hw->mac_type < e1000_82543)
1459 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1460 else
1461 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1462
1463 /* Cache if we're 82544 running in PCI-X because we'll
1464 * need this to apply a workaround later in the send path. */
1465 if (hw->mac_type == e1000_82544 &&
1466 hw->bus_type == e1000_bus_type_pcix)
1467 adapter->pcix_82544 = 1;
1468
1469 E1000_WRITE_REG(hw, TCTL, tctl);
1470
1471 }
1472
1473 /**
1474 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1475 * @adapter: board private structure
1476 * @rxdr: rx descriptor ring (for a specific queue) to setup
1477 *
1478 * Returns 0 on success, negative on failure
1479 **/
1480
1481 static int
1482 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1483 struct e1000_rx_ring *rxdr)
1484 {
1485 struct pci_dev *pdev = adapter->pdev;
1486 int size, desc_len;
1487
1488 size = sizeof(struct e1000_buffer) * rxdr->count;
1489 rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1490 if (!rxdr->buffer_info) {
1491 DPRINTK(PROBE, ERR,
1492 "Unable to allocate memory for the receive descriptor ring\n");
1493 return -ENOMEM;
1494 }
1495 memset(rxdr->buffer_info, 0, size);
1496
1497 size = sizeof(struct e1000_ps_page) * rxdr->count;
1498 rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1499 if (!rxdr->ps_page) {
1500 vfree(rxdr->buffer_info);
1501 DPRINTK(PROBE, ERR,
1502 "Unable to allocate memory for the receive descriptor ring\n");
1503 return -ENOMEM;
1504 }
1505 memset(rxdr->ps_page, 0, size);
1506
1507 size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1508 rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1509 if (!rxdr->ps_page_dma) {
1510 vfree(rxdr->buffer_info);
1511 kfree(rxdr->ps_page);
1512 DPRINTK(PROBE, ERR,
1513 "Unable to allocate memory for the receive descriptor ring\n");
1514 return -ENOMEM;
1515 }
1516 memset(rxdr->ps_page_dma, 0, size);
1517
1518 if (adapter->hw.mac_type <= e1000_82547_rev_2)
1519 desc_len = sizeof(struct e1000_rx_desc);
1520 else
1521 desc_len = sizeof(union e1000_rx_desc_packet_split);
1522
1523 /* Round up to nearest 4K */
1524
1525 rxdr->size = rxdr->count * desc_len;
1526 E1000_ROUNDUP(rxdr->size, 4096);
1527
1528 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1529
1530 if (!rxdr->desc) {
1531 DPRINTK(PROBE, ERR,
1532 "Unable to allocate memory for the receive descriptor ring\n");
1533 setup_rx_desc_die:
1534 vfree(rxdr->buffer_info);
1535 kfree(rxdr->ps_page);
1536 kfree(rxdr->ps_page_dma);
1537 return -ENOMEM;
1538 }
1539
1540 /* Fix for errata 23, can't cross 64kB boundary */
1541 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1542 void *olddesc = rxdr->desc;
1543 dma_addr_t olddma = rxdr->dma;
1544 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1545 "at %p\n", rxdr->size, rxdr->desc);
1546 /* Try again, without freeing the previous */
1547 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1548 /* Failed allocation, critical failure */
1549 if (!rxdr->desc) {
1550 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1551 DPRINTK(PROBE, ERR,
1552 "Unable to allocate memory "
1553 "for the receive descriptor ring\n");
1554 goto setup_rx_desc_die;
1555 }
1556
1557 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1558 /* give up */
1559 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1560 rxdr->dma);
1561 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1562 DPRINTK(PROBE, ERR,
1563 "Unable to allocate aligned memory "
1564 "for the receive descriptor ring\n");
1565 goto setup_rx_desc_die;
1566 } else {
1567 /* Free old allocation, new allocation was successful */
1568 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1569 }
1570 }
1571 memset(rxdr->desc, 0, rxdr->size);
1572
1573 rxdr->next_to_clean = 0;
1574 rxdr->next_to_use = 0;
1575
1576 return 0;
1577 }
1578
1579 /**
1580 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1581 * (Descriptors) for all queues
1582 * @adapter: board private structure
1583 *
1584 * If this function returns with an error, then it's possible one or
1585 * more of the rings is populated (while the rest are not). It is the
1586 * callers duty to clean those orphaned rings.
1587 *
1588 * Return 0 on success, negative on failure
1589 **/
1590
1591 int
1592 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1593 {
1594 int i, err = 0;
1595
1596 for (i = 0; i < adapter->num_rx_queues; i++) {
1597 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1598 if (err) {
1599 DPRINTK(PROBE, ERR,
1600 "Allocation for Rx Queue %u failed\n", i);
1601 break;
1602 }
1603 }
1604
1605 return err;
1606 }
1607
1608 /**
1609 * e1000_setup_rctl - configure the receive control registers
1610 * @adapter: Board private structure
1611 **/
1612 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1613 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1614 static void
1615 e1000_setup_rctl(struct e1000_adapter *adapter)
1616 {
1617 uint32_t rctl, rfctl;
1618 uint32_t psrctl = 0;
1619 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1620 uint32_t pages = 0;
1621 #endif
1622
1623 rctl = E1000_READ_REG(&adapter->hw, RCTL);
1624
1625 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1626
1627 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1628 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1629 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1630
1631 if (adapter->hw.tbi_compatibility_on == 1)
1632 rctl |= E1000_RCTL_SBP;
1633 else
1634 rctl &= ~E1000_RCTL_SBP;
1635
1636 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1637 rctl &= ~E1000_RCTL_LPE;
1638 else
1639 rctl |= E1000_RCTL_LPE;
1640
1641 /* Setup buffer sizes */
1642 rctl &= ~E1000_RCTL_SZ_4096;
1643 rctl |= E1000_RCTL_BSEX;
1644 switch (adapter->rx_buffer_len) {
1645 case E1000_RXBUFFER_256:
1646 rctl |= E1000_RCTL_SZ_256;
1647 rctl &= ~E1000_RCTL_BSEX;
1648 break;
1649 case E1000_RXBUFFER_512:
1650 rctl |= E1000_RCTL_SZ_512;
1651 rctl &= ~E1000_RCTL_BSEX;
1652 break;
1653 case E1000_RXBUFFER_1024:
1654 rctl |= E1000_RCTL_SZ_1024;
1655 rctl &= ~E1000_RCTL_BSEX;
1656 break;
1657 case E1000_RXBUFFER_2048:
1658 default:
1659 rctl |= E1000_RCTL_SZ_2048;
1660 rctl &= ~E1000_RCTL_BSEX;
1661 break;
1662 case E1000_RXBUFFER_4096:
1663 rctl |= E1000_RCTL_SZ_4096;
1664 break;
1665 case E1000_RXBUFFER_8192:
1666 rctl |= E1000_RCTL_SZ_8192;
1667 break;
1668 case E1000_RXBUFFER_16384:
1669 rctl |= E1000_RCTL_SZ_16384;
1670 break;
1671 }
1672
1673 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1674 /* 82571 and greater support packet-split where the protocol
1675 * header is placed in skb->data and the packet data is
1676 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1677 * In the case of a non-split, skb->data is linearly filled,
1678 * followed by the page buffers. Therefore, skb->data is
1679 * sized to hold the largest protocol header.
1680 */
1681 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1682 if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1683 PAGE_SIZE <= 16384)
1684 adapter->rx_ps_pages = pages;
1685 else
1686 adapter->rx_ps_pages = 0;
1687 #endif
1688 if (adapter->rx_ps_pages) {
1689 /* Configure extra packet-split registers */
1690 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1691 rfctl |= E1000_RFCTL_EXTEN;
1692 /* disable IPv6 packet split support */
1693 rfctl |= E1000_RFCTL_IPV6_DIS;
1694 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1695
1696 rctl |= E1000_RCTL_DTYP_PS;
1697
1698 psrctl |= adapter->rx_ps_bsize0 >>
1699 E1000_PSRCTL_BSIZE0_SHIFT;
1700
1701 switch (adapter->rx_ps_pages) {
1702 case 3:
1703 psrctl |= PAGE_SIZE <<
1704 E1000_PSRCTL_BSIZE3_SHIFT;
1705 case 2:
1706 psrctl |= PAGE_SIZE <<
1707 E1000_PSRCTL_BSIZE2_SHIFT;
1708 case 1:
1709 psrctl |= PAGE_SIZE >>
1710 E1000_PSRCTL_BSIZE1_SHIFT;
1711 break;
1712 }
1713
1714 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1715 }
1716
1717 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1718 }
1719
1720 /**
1721 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1722 * @adapter: board private structure
1723 *
1724 * Configure the Rx unit of the MAC after a reset.
1725 **/
1726
1727 static void
1728 e1000_configure_rx(struct e1000_adapter *adapter)
1729 {
1730 uint64_t rdba;
1731 struct e1000_hw *hw = &adapter->hw;
1732 uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1733
1734 if (adapter->rx_ps_pages) {
1735 /* this is a 32 byte descriptor */
1736 rdlen = adapter->rx_ring[0].count *
1737 sizeof(union e1000_rx_desc_packet_split);
1738 adapter->clean_rx = e1000_clean_rx_irq_ps;
1739 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1740 } else {
1741 rdlen = adapter->rx_ring[0].count *
1742 sizeof(struct e1000_rx_desc);
1743 adapter->clean_rx = e1000_clean_rx_irq;
1744 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1745 }
1746
1747 /* disable receives while setting up the descriptors */
1748 rctl = E1000_READ_REG(hw, RCTL);
1749 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1750
1751 /* set the Receive Delay Timer Register */
1752 E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1753
1754 if (hw->mac_type >= e1000_82540) {
1755 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1756 if (adapter->itr > 1)
1757 E1000_WRITE_REG(hw, ITR,
1758 1000000000 / (adapter->itr * 256));
1759 }
1760
1761 if (hw->mac_type >= e1000_82571) {
1762 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1763 /* Reset delay timers after every interrupt */
1764 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1765 #ifdef CONFIG_E1000_NAPI
1766 /* Auto-Mask interrupts upon ICR read. */
1767 ctrl_ext |= E1000_CTRL_EXT_IAME;
1768 #endif
1769 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1770 E1000_WRITE_REG(hw, IAM, ~0);
1771 E1000_WRITE_FLUSH(hw);
1772 }
1773
1774 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1775 * the Base and Length of the Rx Descriptor Ring */
1776 switch (adapter->num_rx_queues) {
1777 case 1:
1778 default:
1779 rdba = adapter->rx_ring[0].dma;
1780 E1000_WRITE_REG(hw, RDLEN, rdlen);
1781 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1782 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1783 E1000_WRITE_REG(hw, RDT, 0);
1784 E1000_WRITE_REG(hw, RDH, 0);
1785 adapter->rx_ring[0].rdh = E1000_RDH;
1786 adapter->rx_ring[0].rdt = E1000_RDT;
1787 break;
1788 }
1789
1790 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1791 if (hw->mac_type >= e1000_82543) {
1792 rxcsum = E1000_READ_REG(hw, RXCSUM);
1793 if (adapter->rx_csum == TRUE) {
1794 rxcsum |= E1000_RXCSUM_TUOFL;
1795
1796 /* Enable 82571 IPv4 payload checksum for UDP fragments
1797 * Must be used in conjunction with packet-split. */
1798 if ((hw->mac_type >= e1000_82571) &&
1799 (adapter->rx_ps_pages)) {
1800 rxcsum |= E1000_RXCSUM_IPPCSE;
1801 }
1802 } else {
1803 rxcsum &= ~E1000_RXCSUM_TUOFL;
1804 /* don't need to clear IPPCSE as it defaults to 0 */
1805 }
1806 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1807 }
1808
1809 if (hw->mac_type == e1000_82573)
1810 E1000_WRITE_REG(hw, ERT, 0x0100);
1811
1812 /* Enable Receives */
1813 E1000_WRITE_REG(hw, RCTL, rctl);
1814 }
1815
1816 /**
1817 * e1000_free_tx_resources - Free Tx Resources per Queue
1818 * @adapter: board private structure
1819 * @tx_ring: Tx descriptor ring for a specific queue
1820 *
1821 * Free all transmit software resources
1822 **/
1823
1824 static void
1825 e1000_free_tx_resources(struct e1000_adapter *adapter,
1826 struct e1000_tx_ring *tx_ring)
1827 {
1828 struct pci_dev *pdev = adapter->pdev;
1829
1830 e1000_clean_tx_ring(adapter, tx_ring);
1831
1832 vfree(tx_ring->buffer_info);
1833 tx_ring->buffer_info = NULL;
1834
1835 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1836
1837 tx_ring->desc = NULL;
1838 }
1839
1840 /**
1841 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1842 * @adapter: board private structure
1843 *
1844 * Free all transmit software resources
1845 **/
1846
1847 void
1848 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1849 {
1850 int i;
1851
1852 for (i = 0; i < adapter->num_tx_queues; i++)
1853 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1854 }
1855
1856 static void
1857 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1858 struct e1000_buffer *buffer_info)
1859 {
1860 if (buffer_info->dma) {
1861 pci_unmap_page(adapter->pdev,
1862 buffer_info->dma,
1863 buffer_info->length,
1864 PCI_DMA_TODEVICE);
1865 }
1866 if (buffer_info->skb)
1867 dev_kfree_skb_any(buffer_info->skb);
1868 memset(buffer_info, 0, sizeof(struct e1000_buffer));
1869 }
1870
1871 /**
1872 * e1000_clean_tx_ring - Free Tx Buffers
1873 * @adapter: board private structure
1874 * @tx_ring: ring to be cleaned
1875 **/
1876
1877 static void
1878 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1879 struct e1000_tx_ring *tx_ring)
1880 {
1881 struct e1000_buffer *buffer_info;
1882 unsigned long size;
1883 unsigned int i;
1884
1885 /* Free all the Tx ring sk_buffs */
1886
1887 for (i = 0; i < tx_ring->count; i++) {
1888 buffer_info = &tx_ring->buffer_info[i];
1889 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1890 }
1891
1892 size = sizeof(struct e1000_buffer) * tx_ring->count;
1893 memset(tx_ring->buffer_info, 0, size);
1894
1895 /* Zero out the descriptor ring */
1896
1897 memset(tx_ring->desc, 0, tx_ring->size);
1898
1899 tx_ring->next_to_use = 0;
1900 tx_ring->next_to_clean = 0;
1901 tx_ring->last_tx_tso = 0;
1902
1903 writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1904 writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1905 }
1906
1907 /**
1908 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1909 * @adapter: board private structure
1910 **/
1911
1912 static void
1913 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1914 {
1915 int i;
1916
1917 for (i = 0; i < adapter->num_tx_queues; i++)
1918 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1919 }
1920
1921 /**
1922 * e1000_free_rx_resources - Free Rx Resources
1923 * @adapter: board private structure
1924 * @rx_ring: ring to clean the resources from
1925 *
1926 * Free all receive software resources
1927 **/
1928
1929 static void
1930 e1000_free_rx_resources(struct e1000_adapter *adapter,
1931 struct e1000_rx_ring *rx_ring)
1932 {
1933 struct pci_dev *pdev = adapter->pdev;
1934
1935 e1000_clean_rx_ring(adapter, rx_ring);
1936
1937 vfree(rx_ring->buffer_info);
1938 rx_ring->buffer_info = NULL;
1939 kfree(rx_ring->ps_page);
1940 rx_ring->ps_page = NULL;
1941 kfree(rx_ring->ps_page_dma);
1942 rx_ring->ps_page_dma = NULL;
1943
1944 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1945
1946 rx_ring->desc = NULL;
1947 }
1948
1949 /**
1950 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1951 * @adapter: board private structure
1952 *
1953 * Free all receive software resources
1954 **/
1955
1956 void
1957 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1958 {
1959 int i;
1960
1961 for (i = 0; i < adapter->num_rx_queues; i++)
1962 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1963 }
1964
1965 /**
1966 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1967 * @adapter: board private structure
1968 * @rx_ring: ring to free buffers from
1969 **/
1970
1971 static void
1972 e1000_clean_rx_ring(struct e1000_adapter *adapter,
1973 struct e1000_rx_ring *rx_ring)
1974 {
1975 struct e1000_buffer *buffer_info;
1976 struct e1000_ps_page *ps_page;
1977 struct e1000_ps_page_dma *ps_page_dma;
1978 struct pci_dev *pdev = adapter->pdev;
1979 unsigned long size;
1980 unsigned int i, j;
1981
1982 /* Free all the Rx ring sk_buffs */
1983 for (i = 0; i < rx_ring->count; i++) {
1984 buffer_info = &rx_ring->buffer_info[i];
1985 if (buffer_info->skb) {
1986 pci_unmap_single(pdev,
1987 buffer_info->dma,
1988 buffer_info->length,
1989 PCI_DMA_FROMDEVICE);
1990
1991 dev_kfree_skb(buffer_info->skb);
1992 buffer_info->skb = NULL;
1993 }
1994 ps_page = &rx_ring->ps_page[i];
1995 ps_page_dma = &rx_ring->ps_page_dma[i];
1996 for (j = 0; j < adapter->rx_ps_pages; j++) {
1997 if (!ps_page->ps_page[j]) break;
1998 pci_unmap_page(pdev,
1999 ps_page_dma->ps_page_dma[j],
2000 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2001 ps_page_dma->ps_page_dma[j] = 0;
2002 put_page(ps_page->ps_page[j]);
2003 ps_page->ps_page[j] = NULL;
2004 }
2005 }
2006
2007 size = sizeof(struct e1000_buffer) * rx_ring->count;
2008 memset(rx_ring->buffer_info, 0, size);
2009 size = sizeof(struct e1000_ps_page) * rx_ring->count;
2010 memset(rx_ring->ps_page, 0, size);
2011 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2012 memset(rx_ring->ps_page_dma, 0, size);
2013
2014 /* Zero out the descriptor ring */
2015
2016 memset(rx_ring->desc, 0, rx_ring->size);
2017
2018 rx_ring->next_to_clean = 0;
2019 rx_ring->next_to_use = 0;
2020
2021 writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2022 writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2023 }
2024
2025 /**
2026 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2027 * @adapter: board private structure
2028 **/
2029
2030 static void
2031 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2032 {
2033 int i;
2034
2035 for (i = 0; i < adapter->num_rx_queues; i++)
2036 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2037 }
2038
2039 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2040 * and memory write and invalidate disabled for certain operations
2041 */
2042 static void
2043 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2044 {
2045 struct net_device *netdev = adapter->netdev;
2046 uint32_t rctl;
2047
2048 e1000_pci_clear_mwi(&adapter->hw);
2049
2050 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2051 rctl |= E1000_RCTL_RST;
2052 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2053 E1000_WRITE_FLUSH(&adapter->hw);
2054 mdelay(5);
2055
2056 if (netif_running(netdev))
2057 e1000_clean_all_rx_rings(adapter);
2058 }
2059
2060 static void
2061 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2062 {
2063 struct net_device *netdev = adapter->netdev;
2064 uint32_t rctl;
2065
2066 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2067 rctl &= ~E1000_RCTL_RST;
2068 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2069 E1000_WRITE_FLUSH(&adapter->hw);
2070 mdelay(5);
2071
2072 if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2073 e1000_pci_set_mwi(&adapter->hw);
2074
2075 if (netif_running(netdev)) {
2076 /* No need to loop, because 82542 supports only 1 queue */
2077 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2078 e1000_configure_rx(adapter);
2079 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2080 }
2081 }
2082
2083 /**
2084 * e1000_set_mac - Change the Ethernet Address of the NIC
2085 * @netdev: network interface device structure
2086 * @p: pointer to an address structure
2087 *
2088 * Returns 0 on success, negative on failure
2089 **/
2090
2091 static int
2092 e1000_set_mac(struct net_device *netdev, void *p)
2093 {
2094 struct e1000_adapter *adapter = netdev_priv(netdev);
2095 struct sockaddr *addr = p;
2096
2097 if (!is_valid_ether_addr(addr->sa_data))
2098 return -EADDRNOTAVAIL;
2099
2100 /* 82542 2.0 needs to be in reset to write receive address registers */
2101
2102 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2103 e1000_enter_82542_rst(adapter);
2104
2105 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2106 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2107
2108 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2109
2110 /* With 82571 controllers, LAA may be overwritten (with the default)
2111 * due to controller reset from the other port. */
2112 if (adapter->hw.mac_type == e1000_82571) {
2113 /* activate the work around */
2114 adapter->hw.laa_is_present = 1;
2115
2116 /* Hold a copy of the LAA in RAR[14] This is done so that
2117 * between the time RAR[0] gets clobbered and the time it
2118 * gets fixed (in e1000_watchdog), the actual LAA is in one
2119 * of the RARs and no incoming packets directed to this port
2120 * are dropped. Eventaully the LAA will be in RAR[0] and
2121 * RAR[14] */
2122 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2123 E1000_RAR_ENTRIES - 1);
2124 }
2125
2126 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2127 e1000_leave_82542_rst(adapter);
2128
2129 return 0;
2130 }
2131
2132 /**
2133 * e1000_set_multi - Multicast and Promiscuous mode set
2134 * @netdev: network interface device structure
2135 *
2136 * The set_multi entry point is called whenever the multicast address
2137 * list or the network interface flags are updated. This routine is
2138 * responsible for configuring the hardware for proper multicast,
2139 * promiscuous mode, and all-multi behavior.
2140 **/
2141
2142 static void
2143 e1000_set_multi(struct net_device *netdev)
2144 {
2145 struct e1000_adapter *adapter = netdev_priv(netdev);
2146 struct e1000_hw *hw = &adapter->hw;
2147 struct dev_mc_list *mc_ptr;
2148 uint32_t rctl;
2149 uint32_t hash_value;
2150 int i, rar_entries = E1000_RAR_ENTRIES;
2151
2152 /* reserve RAR[14] for LAA over-write work-around */
2153 if (adapter->hw.mac_type == e1000_82571)
2154 rar_entries--;
2155
2156 /* Check for Promiscuous and All Multicast modes */
2157
2158 rctl = E1000_READ_REG(hw, RCTL);
2159
2160 if (netdev->flags & IFF_PROMISC) {
2161 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2162 } else if (netdev->flags & IFF_ALLMULTI) {
2163 rctl |= E1000_RCTL_MPE;
2164 rctl &= ~E1000_RCTL_UPE;
2165 } else {
2166 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2167 }
2168
2169 E1000_WRITE_REG(hw, RCTL, rctl);
2170
2171 /* 82542 2.0 needs to be in reset to write receive address registers */
2172
2173 if (hw->mac_type == e1000_82542_rev2_0)
2174 e1000_enter_82542_rst(adapter);
2175
2176 /* load the first 14 multicast address into the exact filters 1-14
2177 * RAR 0 is used for the station MAC adddress
2178 * if there are not 14 addresses, go ahead and clear the filters
2179 * -- with 82571 controllers only 0-13 entries are filled here
2180 */
2181 mc_ptr = netdev->mc_list;
2182
2183 for (i = 1; i < rar_entries; i++) {
2184 if (mc_ptr) {
2185 e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2186 mc_ptr = mc_ptr->next;
2187 } else {
2188 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2189 E1000_WRITE_FLUSH(hw);
2190 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2191 E1000_WRITE_FLUSH(hw);
2192 }
2193 }
2194
2195 /* clear the old settings from the multicast hash table */
2196
2197 for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++) {
2198 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2199 E1000_WRITE_FLUSH(hw);
2200 }
2201
2202 /* load any remaining addresses into the hash table */
2203
2204 for (; mc_ptr; mc_ptr = mc_ptr->next) {
2205 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2206 e1000_mta_set(hw, hash_value);
2207 }
2208
2209 if (hw->mac_type == e1000_82542_rev2_0)
2210 e1000_leave_82542_rst(adapter);
2211 }
2212
2213 /* Need to wait a few seconds after link up to get diagnostic information from
2214 * the phy */
2215
2216 static void
2217 e1000_update_phy_info(unsigned long data)
2218 {
2219 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2220 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2221 }
2222
2223 /**
2224 * e1000_82547_tx_fifo_stall - Timer Call-back
2225 * @data: pointer to adapter cast into an unsigned long
2226 **/
2227
2228 static void
2229 e1000_82547_tx_fifo_stall(unsigned long data)
2230 {
2231 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2232 struct net_device *netdev = adapter->netdev;
2233 uint32_t tctl;
2234
2235 if (atomic_read(&adapter->tx_fifo_stall)) {
2236 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2237 E1000_READ_REG(&adapter->hw, TDH)) &&
2238 (E1000_READ_REG(&adapter->hw, TDFT) ==
2239 E1000_READ_REG(&adapter->hw, TDFH)) &&
2240 (E1000_READ_REG(&adapter->hw, TDFTS) ==
2241 E1000_READ_REG(&adapter->hw, TDFHS))) {
2242 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2243 E1000_WRITE_REG(&adapter->hw, TCTL,
2244 tctl & ~E1000_TCTL_EN);
2245 E1000_WRITE_REG(&adapter->hw, TDFT,
2246 adapter->tx_head_addr);
2247 E1000_WRITE_REG(&adapter->hw, TDFH,
2248 adapter->tx_head_addr);
2249 E1000_WRITE_REG(&adapter->hw, TDFTS,
2250 adapter->tx_head_addr);
2251 E1000_WRITE_REG(&adapter->hw, TDFHS,
2252 adapter->tx_head_addr);
2253 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2254 E1000_WRITE_FLUSH(&adapter->hw);
2255
2256 adapter->tx_fifo_head = 0;
2257 atomic_set(&adapter->tx_fifo_stall, 0);
2258 netif_wake_queue(netdev);
2259 } else {
2260 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2261 }
2262 }
2263 }
2264
2265 /**
2266 * e1000_watchdog - Timer Call-back
2267 * @data: pointer to adapter cast into an unsigned long
2268 **/
2269 static void
2270 e1000_watchdog(unsigned long data)
2271 {
2272 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2273 struct net_device *netdev = adapter->netdev;
2274 struct e1000_tx_ring *txdr = adapter->tx_ring;
2275 uint32_t link, tctl;
2276
2277 e1000_check_for_link(&adapter->hw);
2278 if (adapter->hw.mac_type == e1000_82573) {
2279 e1000_enable_tx_pkt_filtering(&adapter->hw);
2280 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2281 e1000_update_mng_vlan(adapter);
2282 }
2283
2284 if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2285 !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2286 link = !adapter->hw.serdes_link_down;
2287 else
2288 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2289
2290 if (link) {
2291 if (!netif_carrier_ok(netdev)) {
2292 boolean_t txb2b = 1;
2293 e1000_get_speed_and_duplex(&adapter->hw,
2294 &adapter->link_speed,
2295 &adapter->link_duplex);
2296
2297 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2298 adapter->link_speed,
2299 adapter->link_duplex == FULL_DUPLEX ?
2300 "Full Duplex" : "Half Duplex");
2301
2302 /* tweak tx_queue_len according to speed/duplex
2303 * and adjust the timeout factor */
2304 netdev->tx_queue_len = adapter->tx_queue_len;
2305 adapter->tx_timeout_factor = 1;
2306 switch (adapter->link_speed) {
2307 case SPEED_10:
2308 txb2b = 0;
2309 netdev->tx_queue_len = 10;
2310 adapter->tx_timeout_factor = 8;
2311 break;
2312 case SPEED_100:
2313 txb2b = 0;
2314 netdev->tx_queue_len = 100;
2315 /* maybe add some timeout factor ? */
2316 break;
2317 }
2318
2319 if ((adapter->hw.mac_type == e1000_82571 ||
2320 adapter->hw.mac_type == e1000_82572) &&
2321 txb2b == 0) {
2322 #define SPEED_MODE_BIT (1 << 21)
2323 uint32_t tarc0;
2324 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2325 tarc0 &= ~SPEED_MODE_BIT;
2326 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2327 }
2328
2329 #ifdef NETIF_F_TSO
2330 /* disable TSO for pcie and 10/100 speeds, to avoid
2331 * some hardware issues */
2332 if (!adapter->tso_force &&
2333 adapter->hw.bus_type == e1000_bus_type_pci_express){
2334 switch (adapter->link_speed) {
2335 case SPEED_10:
2336 case SPEED_100:
2337 DPRINTK(PROBE,INFO,
2338 "10/100 speed: disabling TSO\n");
2339 netdev->features &= ~NETIF_F_TSO;
2340 break;
2341 case SPEED_1000:
2342 netdev->features |= NETIF_F_TSO;
2343 break;
2344 default:
2345 /* oops */
2346 break;
2347 }
2348 }
2349 #endif
2350
2351 /* enable transmits in the hardware, need to do this
2352 * after setting TARC0 */
2353 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2354 tctl |= E1000_TCTL_EN;
2355 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2356
2357 netif_carrier_on(netdev);
2358 netif_wake_queue(netdev);
2359 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2360 adapter->smartspeed = 0;
2361 }
2362 } else {
2363 if (netif_carrier_ok(netdev)) {
2364 adapter->link_speed = 0;
2365 adapter->link_duplex = 0;
2366 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2367 netif_carrier_off(netdev);
2368 netif_stop_queue(netdev);
2369 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2370
2371 /* 80003ES2LAN workaround--
2372 * For packet buffer work-around on link down event;
2373 * disable receives in the ISR and
2374 * reset device here in the watchdog
2375 */
2376 if (adapter->hw.mac_type == e1000_80003es2lan) {
2377 /* reset device */
2378 schedule_work(&adapter->reset_task);
2379 }
2380 }
2381
2382 e1000_smartspeed(adapter);
2383 }
2384
2385 e1000_update_stats(adapter);
2386
2387 adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2388 adapter->tpt_old = adapter->stats.tpt;
2389 adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2390 adapter->colc_old = adapter->stats.colc;
2391
2392 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2393 adapter->gorcl_old = adapter->stats.gorcl;
2394 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2395 adapter->gotcl_old = adapter->stats.gotcl;
2396
2397 e1000_update_adaptive(&adapter->hw);
2398
2399 if (!netif_carrier_ok(netdev)) {
2400 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2401 /* We've lost link, so the controller stops DMA,
2402 * but we've got queued Tx work that's never going
2403 * to get done, so reset controller to flush Tx.
2404 * (Do the reset outside of interrupt context). */
2405 adapter->tx_timeout_count++;
2406 schedule_work(&adapter->reset_task);
2407 }
2408 }
2409
2410 /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2411 if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2412 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2413 * asymmetrical Tx or Rx gets ITR=8000; everyone
2414 * else is between 2000-8000. */
2415 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2416 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2417 adapter->gotcl - adapter->gorcl :
2418 adapter->gorcl - adapter->gotcl) / 10000;
2419 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2420 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2421 }
2422
2423 /* Cause software interrupt to ensure rx ring is cleaned */
2424 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2425
2426 /* Force detection of hung controller every watchdog period */
2427 adapter->detect_tx_hung = TRUE;
2428
2429 /* With 82571 controllers, LAA may be overwritten due to controller
2430 * reset from the other port. Set the appropriate LAA in RAR[0] */
2431 if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2432 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2433
2434 /* Reset the timer */
2435 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2436 }
2437
2438 #define E1000_TX_FLAGS_CSUM 0x00000001
2439 #define E1000_TX_FLAGS_VLAN 0x00000002
2440 #define E1000_TX_FLAGS_TSO 0x00000004
2441 #define E1000_TX_FLAGS_IPV4 0x00000008
2442 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2443 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2444
2445 static int
2446 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2447 struct sk_buff *skb)
2448 {
2449 #ifdef NETIF_F_TSO
2450 struct e1000_context_desc *context_desc;
2451 struct e1000_buffer *buffer_info;
2452 unsigned int i;
2453 uint32_t cmd_length = 0;
2454 uint16_t ipcse = 0, tucse, mss;
2455 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2456 int err;
2457
2458 if (skb_shinfo(skb)->tso_size) {
2459 if (skb_header_cloned(skb)) {
2460 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2461 if (err)
2462 return err;
2463 }
2464
2465 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2466 mss = skb_shinfo(skb)->tso_size;
2467 if (skb->protocol == htons(ETH_P_IP)) {
2468 skb->nh.iph->tot_len = 0;
2469 skb->nh.iph->check = 0;
2470 skb->h.th->check =
2471 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2472 skb->nh.iph->daddr,
2473 0,
2474 IPPROTO_TCP,
2475 0);
2476 cmd_length = E1000_TXD_CMD_IP;
2477 ipcse = skb->h.raw - skb->data - 1;
2478 #ifdef NETIF_F_TSO_IPV6
2479 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2480 skb->nh.ipv6h->payload_len = 0;
2481 skb->h.th->check =
2482 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2483 &skb->nh.ipv6h->daddr,
2484 0,
2485 IPPROTO_TCP,
2486 0);
2487 ipcse = 0;
2488 #endif
2489 }
2490 ipcss = skb->nh.raw - skb->data;
2491 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2492 tucss = skb->h.raw - skb->data;
2493 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2494 tucse = 0;
2495
2496 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2497 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2498
2499 i = tx_ring->next_to_use;
2500 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2501 buffer_info = &tx_ring->buffer_info[i];
2502
2503 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2504 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2505 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2506 context_desc->upper_setup.tcp_fields.tucss = tucss;
2507 context_desc->upper_setup.tcp_fields.tucso = tucso;
2508 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2509 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2510 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2511 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2512
2513 buffer_info->time_stamp = jiffies;
2514
2515 if (++i == tx_ring->count) i = 0;
2516 tx_ring->next_to_use = i;
2517
2518 return TRUE;
2519 }
2520 #endif
2521
2522 return FALSE;
2523 }
2524
2525 static boolean_t
2526 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2527 struct sk_buff *skb)
2528 {
2529 struct e1000_context_desc *context_desc;
2530 struct e1000_buffer *buffer_info;
2531 unsigned int i;
2532 uint8_t css;
2533
2534 if (likely(skb->ip_summed == CHECKSUM_HW)) {
2535 css = skb->h.raw - skb->data;
2536
2537 i = tx_ring->next_to_use;
2538 buffer_info = &tx_ring->buffer_info[i];
2539 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2540
2541 context_desc->upper_setup.tcp_fields.tucss = css;
2542 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2543 context_desc->upper_setup.tcp_fields.tucse = 0;
2544 context_desc->tcp_seg_setup.data = 0;
2545 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2546
2547 buffer_info->time_stamp = jiffies;
2548
2549 if (unlikely(++i == tx_ring->count)) i = 0;
2550 tx_ring->next_to_use = i;
2551
2552 return TRUE;
2553 }
2554
2555 return FALSE;
2556 }
2557
2558 #define E1000_MAX_TXD_PWR 12
2559 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2560
2561 static int
2562 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2563 struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2564 unsigned int nr_frags, unsigned int mss)
2565 {
2566 struct e1000_buffer *buffer_info;
2567 unsigned int len = skb->len;
2568 unsigned int offset = 0, size, count = 0, i;
2569 unsigned int f;
2570 len -= skb->data_len;
2571
2572 i = tx_ring->next_to_use;
2573
2574 while (len) {
2575 buffer_info = &tx_ring->buffer_info[i];
2576 size = min(len, max_per_txd);
2577 #ifdef NETIF_F_TSO
2578 /* Workaround for Controller erratum --
2579 * descriptor for non-tso packet in a linear SKB that follows a
2580 * tso gets written back prematurely before the data is fully
2581 * DMA'd to the controller */
2582 if (!skb->data_len && tx_ring->last_tx_tso &&
2583 !skb_shinfo(skb)->tso_size) {
2584 tx_ring->last_tx_tso = 0;
2585 size -= 4;
2586 }
2587
2588 /* Workaround for premature desc write-backs
2589 * in TSO mode. Append 4-byte sentinel desc */
2590 if (unlikely(mss && !nr_frags && size == len && size > 8))
2591 size -= 4;
2592 #endif
2593 /* work-around for errata 10 and it applies
2594 * to all controllers in PCI-X mode
2595 * The fix is to make sure that the first descriptor of a
2596 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2597 */
2598 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2599 (size > 2015) && count == 0))
2600 size = 2015;
2601
2602 /* Workaround for potential 82544 hang in PCI-X. Avoid
2603 * terminating buffers within evenly-aligned dwords. */
2604 if (unlikely(adapter->pcix_82544 &&
2605 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2606 size > 4))
2607 size -= 4;
2608
2609 buffer_info->length = size;
2610 buffer_info->dma =
2611 pci_map_single(adapter->pdev,
2612 skb->data + offset,
2613 size,
2614 PCI_DMA_TODEVICE);
2615 buffer_info->time_stamp = jiffies;
2616
2617 len -= size;
2618 offset += size;
2619 count++;
2620 if (unlikely(++i == tx_ring->count)) i = 0;
2621 }
2622
2623 for (f = 0; f < nr_frags; f++) {
2624 struct skb_frag_struct *frag;
2625
2626 frag = &skb_shinfo(skb)->frags[f];
2627 len = frag->size;
2628 offset = frag->page_offset;
2629
2630 while (len) {
2631 buffer_info = &tx_ring->buffer_info[i];
2632 size = min(len, max_per_txd);
2633 #ifdef NETIF_F_TSO
2634 /* Workaround for premature desc write-backs
2635 * in TSO mode. Append 4-byte sentinel desc */
2636 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2637 size -= 4;
2638 #endif
2639 /* Workaround for potential 82544 hang in PCI-X.
2640 * Avoid terminating buffers within evenly-aligned
2641 * dwords. */
2642 if (unlikely(adapter->pcix_82544 &&
2643 !((unsigned long)(frag->page+offset+size-1) & 4) &&
2644 size > 4))
2645 size -= 4;
2646
2647 buffer_info->length = size;
2648 buffer_info->dma =
2649 pci_map_page(adapter->pdev,
2650 frag->page,
2651 offset,
2652 size,
2653 PCI_DMA_TODEVICE);
2654 buffer_info->time_stamp = jiffies;
2655
2656 len -= size;
2657 offset += size;
2658 count++;
2659 if (unlikely(++i == tx_ring->count)) i = 0;
2660 }
2661 }
2662
2663 i = (i == 0) ? tx_ring->count - 1 : i - 1;
2664 tx_ring->buffer_info[i].skb = skb;
2665 tx_ring->buffer_info[first].next_to_watch = i;
2666
2667 return count;
2668 }
2669
2670 static void
2671 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2672 int tx_flags, int count)
2673 {
2674 struct e1000_tx_desc *tx_desc = NULL;
2675 struct e1000_buffer *buffer_info;
2676 uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2677 unsigned int i;
2678
2679 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2680 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2681 E1000_TXD_CMD_TSE;
2682 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2683
2684 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2685 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2686 }
2687
2688 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2689 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2690 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2691 }
2692
2693 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2694 txd_lower |= E1000_TXD_CMD_VLE;
2695 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2696 }
2697
2698 i = tx_ring->next_to_use;
2699
2700 while (count--) {
2701 buffer_info = &tx_ring->buffer_info[i];
2702 tx_desc = E1000_TX_DESC(*tx_ring, i);
2703 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2704 tx_desc->lower.data =
2705 cpu_to_le32(txd_lower | buffer_info->length);
2706 tx_desc->upper.data = cpu_to_le32(txd_upper);
2707 if (unlikely(++i == tx_ring->count)) i = 0;
2708 }
2709
2710 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2711
2712 /* Force memory writes to complete before letting h/w
2713 * know there are new descriptors to fetch. (Only
2714 * applicable for weak-ordered memory model archs,
2715 * such as IA-64). */
2716 wmb();
2717
2718 tx_ring->next_to_use = i;
2719 writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2720 }
2721
2722 /**
2723 * 82547 workaround to avoid controller hang in half-duplex environment.
2724 * The workaround is to avoid queuing a large packet that would span
2725 * the internal Tx FIFO ring boundary by notifying the stack to resend
2726 * the packet at a later time. This gives the Tx FIFO an opportunity to
2727 * flush all packets. When that occurs, we reset the Tx FIFO pointers
2728 * to the beginning of the Tx FIFO.
2729 **/
2730
2731 #define E1000_FIFO_HDR 0x10
2732 #define E1000_82547_PAD_LEN 0x3E0
2733
2734 static int
2735 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2736 {
2737 uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2738 uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2739
2740 E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2741
2742 if (adapter->link_duplex != HALF_DUPLEX)
2743 goto no_fifo_stall_required;
2744
2745 if (atomic_read(&adapter->tx_fifo_stall))
2746 return 1;
2747
2748 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2749 atomic_set(&adapter->tx_fifo_stall, 1);
2750 return 1;
2751 }
2752
2753 no_fifo_stall_required:
2754 adapter->tx_fifo_head += skb_fifo_len;
2755 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2756 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2757 return 0;
2758 }
2759
2760 #define MINIMUM_DHCP_PACKET_SIZE 282
2761 static int
2762 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2763 {
2764 struct e1000_hw *hw = &adapter->hw;
2765 uint16_t length, offset;
2766 if (vlan_tx_tag_present(skb)) {
2767 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2768 ( adapter->hw.mng_cookie.status &
2769 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2770 return 0;
2771 }
2772 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2773 struct ethhdr *eth = (struct ethhdr *) skb->data;
2774 if ((htons(ETH_P_IP) == eth->h_proto)) {
2775 const struct iphdr *ip =
2776 (struct iphdr *)((uint8_t *)skb->data+14);
2777 if (IPPROTO_UDP == ip->protocol) {
2778 struct udphdr *udp =
2779 (struct udphdr *)((uint8_t *)ip +
2780 (ip->ihl << 2));
2781 if (ntohs(udp->dest) == 67) {
2782 offset = (uint8_t *)udp + 8 - skb->data;
2783 length = skb->len - offset;
2784
2785 return e1000_mng_write_dhcp_info(hw,
2786 (uint8_t *)udp + 8,
2787 length);
2788 }
2789 }
2790 }
2791 }
2792 return 0;
2793 }
2794
2795 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2796 static int
2797 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2798 {
2799 struct e1000_adapter *adapter = netdev_priv(netdev);
2800 struct e1000_tx_ring *tx_ring;
2801 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2802 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2803 unsigned int tx_flags = 0;
2804 unsigned int len = skb->len;
2805 unsigned long flags;
2806 unsigned int nr_frags = 0;
2807 unsigned int mss = 0;
2808 int count = 0;
2809 int tso;
2810 unsigned int f;
2811 len -= skb->data_len;
2812
2813 tx_ring = adapter->tx_ring;
2814
2815 if (unlikely(skb->len <= 0)) {
2816 dev_kfree_skb_any(skb);
2817 return NETDEV_TX_OK;
2818 }
2819
2820 #ifdef NETIF_F_TSO
2821 mss = skb_shinfo(skb)->tso_size;
2822 /* The controller does a simple calculation to
2823 * make sure there is enough room in the FIFO before
2824 * initiating the DMA for each buffer. The calc is:
2825 * 4 = ceil(buffer len/mss). To make sure we don't
2826 * overrun the FIFO, adjust the max buffer len if mss
2827 * drops. */
2828 if (mss) {
2829 uint8_t hdr_len;
2830 max_per_txd = min(mss << 2, max_per_txd);
2831 max_txd_pwr = fls(max_per_txd) - 1;
2832
2833 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
2834 * points to just header, pull a few bytes of payload from
2835 * frags into skb->data */
2836 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2837 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
2838 switch (adapter->hw.mac_type) {
2839 unsigned int pull_size;
2840 case e1000_82571:
2841 case e1000_82572:
2842 case e1000_82573:
2843 pull_size = min((unsigned int)4, skb->data_len);
2844 if (!__pskb_pull_tail(skb, pull_size)) {
2845 DPRINTK(DRV, ERR,
2846 "__pskb_pull_tail failed.\n");
2847 dev_kfree_skb_any(skb);
2848 return NETDEV_TX_OK;
2849 }
2850 len = skb->len - skb->data_len;
2851 break;
2852 default:
2853 /* do nothing */
2854 break;
2855 }
2856 }
2857 }
2858
2859 /* reserve a descriptor for the offload context */
2860 if ((mss) || (skb->ip_summed == CHECKSUM_HW))
2861 count++;
2862 count++;
2863 #else
2864 if (skb->ip_summed == CHECKSUM_HW)
2865 count++;
2866 #endif
2867
2868 #ifdef NETIF_F_TSO
2869 /* Controller Erratum workaround */
2870 if (!skb->data_len && tx_ring->last_tx_tso &&
2871 !skb_shinfo(skb)->tso_size)
2872 count++;
2873 #endif
2874
2875 count += TXD_USE_COUNT(len, max_txd_pwr);
2876
2877 if (adapter->pcix_82544)
2878 count++;
2879
2880 /* work-around for errata 10 and it applies to all controllers
2881 * in PCI-X mode, so add one more descriptor to the count
2882 */
2883 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2884 (len > 2015)))
2885 count++;
2886
2887 nr_frags = skb_shinfo(skb)->nr_frags;
2888 for (f = 0; f < nr_frags; f++)
2889 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2890 max_txd_pwr);
2891 if (adapter->pcix_82544)
2892 count += nr_frags;
2893
2894
2895 if (adapter->hw.tx_pkt_filtering &&
2896 (adapter->hw.mac_type == e1000_82573))
2897 e1000_transfer_dhcp_info(adapter, skb);
2898
2899 local_irq_save(flags);
2900 if (!spin_trylock(&tx_ring->tx_lock)) {
2901 /* Collision - tell upper layer to requeue */
2902 local_irq_restore(flags);
2903 return NETDEV_TX_LOCKED;
2904 }
2905
2906 /* need: count + 2 desc gap to keep tail from touching
2907 * head, otherwise try next time */
2908 if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2909 netif_stop_queue(netdev);
2910 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2911 return NETDEV_TX_BUSY;
2912 }
2913
2914 if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2915 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2916 netif_stop_queue(netdev);
2917 mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2918 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2919 return NETDEV_TX_BUSY;
2920 }
2921 }
2922
2923 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2924 tx_flags |= E1000_TX_FLAGS_VLAN;
2925 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2926 }
2927
2928 first = tx_ring->next_to_use;
2929
2930 tso = e1000_tso(adapter, tx_ring, skb);
2931 if (tso < 0) {
2932 dev_kfree_skb_any(skb);
2933 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2934 return NETDEV_TX_OK;
2935 }
2936
2937 if (likely(tso)) {
2938 tx_ring->last_tx_tso = 1;
2939 tx_flags |= E1000_TX_FLAGS_TSO;
2940 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2941 tx_flags |= E1000_TX_FLAGS_CSUM;
2942
2943 /* Old method was to assume IPv4 packet by default if TSO was enabled.
2944 * 82571 hardware supports TSO capabilities for IPv6 as well...
2945 * no longer assume, we must. */
2946 if (likely(skb->protocol == htons(ETH_P_IP)))
2947 tx_flags |= E1000_TX_FLAGS_IPV4;
2948
2949 e1000_tx_queue(adapter, tx_ring, tx_flags,
2950 e1000_tx_map(adapter, tx_ring, skb, first,
2951 max_per_txd, nr_frags, mss));
2952
2953 netdev->trans_start = jiffies;
2954
2955 /* Make sure there is space in the ring for the next send. */
2956 if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2957 netif_stop_queue(netdev);
2958
2959 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2960 return NETDEV_TX_OK;
2961 }
2962
2963 /**
2964 * e1000_tx_timeout - Respond to a Tx Hang
2965 * @netdev: network interface device structure
2966 **/
2967
2968 static void
2969 e1000_tx_timeout(struct net_device *netdev)
2970 {
2971 struct e1000_adapter *adapter = netdev_priv(netdev);
2972
2973 /* Do the reset outside of interrupt context */
2974 adapter->tx_timeout_count++;
2975 schedule_work(&adapter->reset_task);
2976 }
2977
2978 static void
2979 e1000_reset_task(struct net_device *netdev)
2980 {
2981 struct e1000_adapter *adapter = netdev_priv(netdev);
2982
2983 e1000_reinit_locked(adapter);
2984 }
2985
2986 /**
2987 * e1000_get_stats - Get System Network Statistics
2988 * @netdev: network interface device structure
2989 *
2990 * Returns the address of the device statistics structure.
2991 * The statistics are actually updated from the timer callback.
2992 **/
2993
2994 static struct net_device_stats *
2995 e1000_get_stats(struct net_device *netdev)
2996 {
2997 struct e1000_adapter *adapter = netdev_priv(netdev);
2998
2999 /* only return the current stats */
3000 return &adapter->net_stats;
3001 }
3002
3003 /**
3004 * e1000_change_mtu - Change the Maximum Transfer Unit
3005 * @netdev: network interface device structure
3006 * @new_mtu: new value for maximum frame size
3007 *
3008 * Returns 0 on success, negative on failure
3009 **/
3010
3011 static int
3012 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3013 {
3014 struct e1000_adapter *adapter = netdev_priv(netdev);
3015 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3016 uint16_t eeprom_data = 0;
3017
3018 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3019 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3020 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3021 return -EINVAL;
3022 }
3023
3024 /* Adapter-specific max frame size limits. */
3025 switch (adapter->hw.mac_type) {
3026 case e1000_undefined ... e1000_82542_rev2_1:
3027 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3028 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3029 return -EINVAL;
3030 }
3031 break;
3032 case e1000_82573:
3033 /* only enable jumbo frames if ASPM is disabled completely
3034 * this means both bits must be zero in 0x1A bits 3:2 */
3035 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3036 &eeprom_data);
3037 if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
3038 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3039 DPRINTK(PROBE, ERR,
3040 "Jumbo Frames not supported.\n");
3041 return -EINVAL;
3042 }
3043 break;
3044 }
3045 /* fall through to get support */
3046 case e1000_82571:
3047 case e1000_82572:
3048 case e1000_80003es2lan:
3049 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3050 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3051 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3052 return -EINVAL;
3053 }
3054 break;
3055 default:
3056 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3057 break;
3058 }
3059
3060 /* NOTE: dev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3061 * means we reserve 2 more, this pushes us to allocate from the next
3062 * larger slab size
3063 * i.e. RXBUFFER_2048 --> size-4096 slab */
3064
3065 if (max_frame <= E1000_RXBUFFER_256)
3066 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3067 else if (max_frame <= E1000_RXBUFFER_512)
3068 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3069 else if (max_frame <= E1000_RXBUFFER_1024)
3070 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3071 else if (max_frame <= E1000_RXBUFFER_2048)
3072 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3073 else if (max_frame <= E1000_RXBUFFER_4096)
3074 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3075 else if (max_frame <= E1000_RXBUFFER_8192)
3076 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3077 else if (max_frame <= E1000_RXBUFFER_16384)
3078 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3079
3080 /* adjust allocation if LPE protects us, and we aren't using SBP */
3081 #define MAXIMUM_ETHERNET_VLAN_SIZE 1522
3082 if (!adapter->hw.tbi_compatibility_on &&
3083 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3084 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3085 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3086
3087 netdev->mtu = new_mtu;
3088
3089 if (netif_running(netdev))
3090 e1000_reinit_locked(adapter);
3091
3092 adapter->hw.max_frame_size = max_frame;
3093
3094 return 0;
3095 }
3096
3097 /**
3098 * e1000_update_stats - Update the board statistics counters
3099 * @adapter: board private structure
3100 **/
3101
3102 void
3103 e1000_update_stats(struct e1000_adapter *adapter)
3104 {
3105 struct e1000_hw *hw = &adapter->hw;
3106 struct pci_dev *pdev = adapter->pdev;
3107 unsigned long flags;
3108 uint16_t phy_tmp;
3109
3110 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3111
3112 /*
3113 * Prevent stats update while adapter is being reset, or if the pci
3114 * connection is down.
3115 */
3116 if (adapter->link_speed == 0)
3117 return;
3118 if (pdev->error_state && pdev->error_state != pci_channel_io_normal)
3119 return;
3120
3121 spin_lock_irqsave(&adapter->stats_lock, flags);
3122
3123 /* these counters are modified from e1000_adjust_tbi_stats,
3124 * called from the interrupt context, so they must only
3125 * be written while holding adapter->stats_lock
3126 */
3127
3128 adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3129 adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3130 adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3131 adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3132 adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3133 adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3134 adapter->stats.roc += E1000_READ_REG(hw, ROC);
3135 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3136 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3137 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3138 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3139 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3140 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3141
3142 adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3143 adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3144 adapter->stats.scc += E1000_READ_REG(hw, SCC);
3145 adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3146 adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3147 adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3148 adapter->stats.dc += E1000_READ_REG(hw, DC);
3149 adapter->stats.sec += E1000_READ_REG(hw, SEC);
3150 adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3151 adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3152 adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3153 adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3154 adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3155 adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3156 adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3157 adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3158 adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3159 adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3160 adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3161 adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3162 adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3163 adapter->stats.torl += E1000_READ_REG(hw, TORL);
3164 adapter->stats.torh += E1000_READ_REG(hw, TORH);
3165 adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3166 adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3167 adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3168 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3169 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3170 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3171 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3172 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3173 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3174 adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3175 adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3176
3177 /* used for adaptive IFS */
3178
3179 hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3180 adapter->stats.tpt += hw->tx_packet_delta;
3181 hw->collision_delta = E1000_READ_REG(hw, COLC);
3182 adapter->stats.colc += hw->collision_delta;
3183
3184 if (hw->mac_type >= e1000_82543) {
3185 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3186 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3187 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3188 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3189 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3190 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3191 }
3192 if (hw->mac_type > e1000_82547_rev_2) {
3193 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3194 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3195 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3196 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3197 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3198 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3199 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3200 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3201 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3202 }
3203
3204 /* Fill out the OS statistics structure */
3205
3206 adapter->net_stats.rx_packets = adapter->stats.gprc;
3207 adapter->net_stats.tx_packets = adapter->stats.gptc;
3208 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3209 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3210 adapter->net_stats.multicast = adapter->stats.mprc;
3211 adapter->net_stats.collisions = adapter->stats.colc;
3212
3213 /* Rx Errors */
3214
3215 /* RLEC on some newer hardware can be incorrect so build
3216 * our own version based on RUC and ROC */
3217 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3218 adapter->stats.crcerrs + adapter->stats.algnerrc +
3219 adapter->stats.ruc + adapter->stats.roc +
3220 adapter->stats.cexterr;
3221 adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3222 adapter->stats.roc;
3223 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3224 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3225 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3226
3227 /* Tx Errors */
3228
3229 adapter->net_stats.tx_errors = adapter->stats.ecol +
3230 adapter->stats.latecol;
3231 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3232 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3233 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3234
3235 /* Tx Dropped needs to be maintained elsewhere */
3236
3237 /* Phy Stats */
3238
3239 if (hw->media_type == e1000_media_type_copper) {
3240 if ((adapter->link_speed == SPEED_1000) &&
3241 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3242 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3243 adapter->phy_stats.idle_errors += phy_tmp;
3244 }
3245
3246 if ((hw->mac_type <= e1000_82546) &&
3247 (hw->phy_type == e1000_phy_m88) &&
3248 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3249 adapter->phy_stats.receive_errors += phy_tmp;
3250 }
3251
3252 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3253 }
3254
3255 /**
3256 * e1000_intr - Interrupt Handler
3257 * @irq: interrupt number
3258 * @data: pointer to a network interface device structure
3259 * @pt_regs: CPU registers structure
3260 **/
3261
3262 static irqreturn_t
3263 e1000_intr(int irq, void *data, struct pt_regs *regs)
3264 {
3265 struct net_device *netdev = data;
3266 struct e1000_adapter *adapter = netdev_priv(netdev);
3267 struct e1000_hw *hw = &adapter->hw;
3268 uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3269 #ifndef CONFIG_E1000_NAPI
3270 int i;
3271 #else
3272 /* Interrupt Auto-Mask...upon reading ICR,
3273 * interrupts are masked. No need for the
3274 * IMC write, but it does mean we should
3275 * account for it ASAP. */
3276 if (likely(hw->mac_type >= e1000_82571))
3277 atomic_inc(&adapter->irq_sem);
3278 #endif
3279
3280 if (unlikely(!icr)) {
3281 #ifdef CONFIG_E1000_NAPI
3282 if (hw->mac_type >= e1000_82571)
3283 e1000_irq_enable(adapter);
3284 #endif
3285 return IRQ_NONE; /* Not our interrupt */
3286 }
3287
3288 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3289 hw->get_link_status = 1;
3290 /* 80003ES2LAN workaround--
3291 * For packet buffer work-around on link down event;
3292 * disable receives here in the ISR and
3293 * reset adapter in watchdog
3294 */
3295 if (netif_carrier_ok(netdev) &&
3296 (adapter->hw.mac_type == e1000_80003es2lan)) {
3297 /* disable receives */
3298 rctl = E1000_READ_REG(hw, RCTL);
3299 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3300 }
3301 mod_timer(&adapter->watchdog_timer, jiffies);
3302 }
3303
3304 #ifdef CONFIG_E1000_NAPI
3305 if (unlikely(hw->mac_type < e1000_82571)) {
3306 atomic_inc(&adapter->irq_sem);
3307 E1000_WRITE_REG(hw, IMC, ~0);
3308 E1000_WRITE_FLUSH(hw);
3309 }
3310 if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3311 __netif_rx_schedule(&adapter->polling_netdev[0]);
3312 else
3313 e1000_irq_enable(adapter);
3314 #else
3315 /* Writing IMC and IMS is needed for 82547.
3316 * Due to Hub Link bus being occupied, an interrupt
3317 * de-assertion message is not able to be sent.
3318 * When an interrupt assertion message is generated later,
3319 * two messages are re-ordered and sent out.
3320 * That causes APIC to think 82547 is in de-assertion
3321 * state, while 82547 is in assertion state, resulting
3322 * in dead lock. Writing IMC forces 82547 into
3323 * de-assertion state.
3324 */
3325 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3326 atomic_inc(&adapter->irq_sem);
3327 E1000_WRITE_REG(hw, IMC, ~0);
3328 }
3329
3330 for (i = 0; i < E1000_MAX_INTR; i++)
3331 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3332 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3333 break;
3334
3335 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3336 e1000_irq_enable(adapter);
3337
3338 #endif
3339
3340 return IRQ_HANDLED;
3341 }
3342
3343 #ifdef CONFIG_E1000_NAPI
3344 /**
3345 * e1000_clean - NAPI Rx polling callback
3346 * @adapter: board private structure
3347 **/
3348
3349 static int
3350 e1000_clean(struct net_device *poll_dev, int *budget)
3351 {
3352 struct e1000_adapter *adapter;
3353 int work_to_do = min(*budget, poll_dev->quota);
3354 int tx_cleaned = 0, i = 0, work_done = 0;
3355
3356 /* Must NOT use netdev_priv macro here. */
3357 adapter = poll_dev->priv;
3358
3359 /* Keep link state information with original netdev */
3360 if (!netif_carrier_ok(adapter->netdev))
3361 goto quit_polling;
3362
3363 while (poll_dev != &adapter->polling_netdev[i]) {
3364 i++;
3365 BUG_ON(i == adapter->num_rx_queues);
3366 }
3367
3368 if (likely(adapter->num_tx_queues == 1)) {
3369 /* e1000_clean is called per-cpu. This lock protects
3370 * tx_ring[0] from being cleaned by multiple cpus
3371 * simultaneously. A failure obtaining the lock means
3372 * tx_ring[0] is currently being cleaned anyway. */
3373 if (spin_trylock(&adapter->tx_queue_lock)) {
3374 tx_cleaned = e1000_clean_tx_irq(adapter,
3375 &adapter->tx_ring[0]);
3376 spin_unlock(&adapter->tx_queue_lock);
3377 }
3378 } else
3379 tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3380
3381 adapter->clean_rx(adapter, &adapter->rx_ring[i],
3382 &work_done, work_to_do);
3383
3384 *budget -= work_done;
3385 poll_dev->quota -= work_done;
3386
3387 /* If no Tx and not enough Rx work done, exit the polling mode */
3388 if ((!tx_cleaned && (work_done == 0)) ||
3389 !netif_running(adapter->netdev)) {
3390 quit_polling:
3391 netif_rx_complete(poll_dev);
3392 e1000_irq_enable(adapter);
3393 return 0;
3394 }
3395
3396 return 1;
3397 }
3398
3399 #endif
3400 /**
3401 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3402 * @adapter: board private structure
3403 **/
3404
3405 static boolean_t
3406 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3407 struct e1000_tx_ring *tx_ring)
3408 {
3409 struct net_device *netdev = adapter->netdev;
3410 struct e1000_tx_desc *tx_desc, *eop_desc;
3411 struct e1000_buffer *buffer_info;
3412 unsigned int i, eop;
3413 #ifdef CONFIG_E1000_NAPI
3414 unsigned int count = 0;
3415 #endif
3416 boolean_t cleaned = FALSE;
3417
3418 i = tx_ring->next_to_clean;
3419 eop = tx_ring->buffer_info[i].next_to_watch;
3420 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3421
3422 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3423 for (cleaned = FALSE; !cleaned; ) {
3424 tx_desc = E1000_TX_DESC(*tx_ring, i);
3425 buffer_info = &tx_ring->buffer_info[i];
3426 cleaned = (i == eop);
3427
3428 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3429 memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3430
3431 if (unlikely(++i == tx_ring->count)) i = 0;
3432 }
3433
3434
3435 eop = tx_ring->buffer_info[i].next_to_watch;
3436 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3437 #ifdef CONFIG_E1000_NAPI
3438 #define E1000_TX_WEIGHT 64
3439 /* weight of a sort for tx, to avoid endless transmit cleanup */
3440 if (count++ == E1000_TX_WEIGHT) break;
3441 #endif
3442 }
3443
3444 tx_ring->next_to_clean = i;
3445
3446 #define TX_WAKE_THRESHOLD 32
3447 if (unlikely(cleaned && netif_queue_stopped(netdev) &&
3448 netif_carrier_ok(netdev))) {
3449 spin_lock(&tx_ring->tx_lock);
3450 if (netif_queue_stopped(netdev) &&
3451 (E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))
3452 netif_wake_queue(netdev);
3453 spin_unlock(&tx_ring->tx_lock);
3454 }
3455
3456 if (adapter->detect_tx_hung) {
3457 /* Detect a transmit hang in hardware, this serializes the
3458 * check with the clearing of time_stamp and movement of i */
3459 adapter->detect_tx_hung = FALSE;
3460 if (tx_ring->buffer_info[eop].dma &&
3461 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3462 (adapter->tx_timeout_factor * HZ))
3463 && !(E1000_READ_REG(&adapter->hw, STATUS) &
3464 E1000_STATUS_TXOFF)) {
3465
3466 /* detected Tx unit hang */
3467 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3468 " Tx Queue <%lu>\n"
3469 " TDH <%x>\n"
3470 " TDT <%x>\n"
3471 " next_to_use <%x>\n"
3472 " next_to_clean <%x>\n"
3473 "buffer_info[next_to_clean]\n"
3474 " time_stamp <%lx>\n"
3475 " next_to_watch <%x>\n"
3476 " jiffies <%lx>\n"
3477 " next_to_watch.status <%x>\n",
3478 (unsigned long)((tx_ring - adapter->tx_ring) /
3479 sizeof(struct e1000_tx_ring)),
3480 readl(adapter->hw.hw_addr + tx_ring->tdh),
3481 readl(adapter->hw.hw_addr + tx_ring->tdt),
3482 tx_ring->next_to_use,
3483 tx_ring->next_to_clean,
3484 tx_ring->buffer_info[eop].time_stamp,
3485 eop,
3486 jiffies,
3487 eop_desc->upper.fields.status);
3488 netif_stop_queue(netdev);
3489 }
3490 }
3491 return cleaned;
3492 }
3493
3494 /**
3495 * e1000_rx_checksum - Receive Checksum Offload for 82543
3496 * @adapter: board private structure
3497 * @status_err: receive descriptor status and error fields
3498 * @csum: receive descriptor csum field
3499 * @sk_buff: socket buffer with received data
3500 **/
3501
3502 static void
3503 e1000_rx_checksum(struct e1000_adapter *adapter,
3504 uint32_t status_err, uint32_t csum,
3505 struct sk_buff *skb)
3506 {
3507 uint16_t status = (uint16_t)status_err;
3508 uint8_t errors = (uint8_t)(status_err >> 24);
3509 skb->ip_summed = CHECKSUM_NONE;
3510
3511 /* 82543 or newer only */
3512 if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3513 /* Ignore Checksum bit is set */
3514 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3515 /* TCP/UDP checksum error bit is set */
3516 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3517 /* let the stack verify checksum errors */
3518 adapter->hw_csum_err++;
3519 return;
3520 }
3521 /* TCP/UDP Checksum has not been calculated */
3522 if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3523 if (!(status & E1000_RXD_STAT_TCPCS))
3524 return;
3525 } else {
3526 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3527 return;
3528 }
3529 /* It must be a TCP or UDP packet with a valid checksum */
3530 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3531 /* TCP checksum is good */
3532 skb->ip_summed = CHECKSUM_UNNECESSARY;
3533 } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3534 /* IP fragment with UDP payload */
3535 /* Hardware complements the payload checksum, so we undo it
3536 * and then put the value in host order for further stack use.
3537 */
3538 csum = ntohl(csum ^ 0xFFFF);
3539 skb->csum = csum;
3540 skb->ip_summed = CHECKSUM_HW;
3541 }
3542 adapter->hw_csum_good++;
3543 }
3544
3545 /**
3546 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3547 * @adapter: board private structure
3548 **/
3549
3550 static boolean_t
3551 #ifdef CONFIG_E1000_NAPI
3552 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3553 struct e1000_rx_ring *rx_ring,
3554 int *work_done, int work_to_do)
3555 #else
3556 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3557 struct e1000_rx_ring *rx_ring)
3558 #endif
3559 {
3560 struct net_device *netdev = adapter->netdev;
3561 struct pci_dev *pdev = adapter->pdev;
3562 struct e1000_rx_desc *rx_desc, *next_rxd;
3563 struct e1000_buffer *buffer_info, *next_buffer;
3564 unsigned long flags;
3565 uint32_t length;
3566 uint8_t last_byte;
3567 unsigned int i;
3568 int cleaned_count = 0;
3569 boolean_t cleaned = FALSE;
3570
3571 i = rx_ring->next_to_clean;
3572 rx_desc = E1000_RX_DESC(*rx_ring, i);
3573 buffer_info = &rx_ring->buffer_info[i];
3574
3575 while (rx_desc->status & E1000_RXD_STAT_DD) {
3576 struct sk_buff *skb;
3577 u8 status;
3578 #ifdef CONFIG_E1000_NAPI
3579 if (*work_done >= work_to_do)
3580 break;
3581 (*work_done)++;
3582 #endif
3583 status = rx_desc->status;
3584 skb = buffer_info->skb;
3585 buffer_info->skb = NULL;
3586
3587 prefetch(skb->data - NET_IP_ALIGN);
3588
3589 if (++i == rx_ring->count) i = 0;
3590 next_rxd = E1000_RX_DESC(*rx_ring, i);
3591 prefetch(next_rxd);
3592
3593 next_buffer = &rx_ring->buffer_info[i];
3594
3595 cleaned = TRUE;
3596 cleaned_count++;
3597 pci_unmap_single(pdev,
3598 buffer_info->dma,
3599 buffer_info->length,
3600 PCI_DMA_FROMDEVICE);
3601
3602 length = le16_to_cpu(rx_desc->length);
3603
3604 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3605 /* All receives must fit into a single buffer */
3606 E1000_DBG("%s: Receive packet consumed multiple"
3607 " buffers\n", netdev->name);
3608 /* recycle */
3609 buffer_info-> skb = skb;
3610 goto next_desc;
3611 }
3612
3613 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3614 last_byte = *(skb->data + length - 1);
3615 if (TBI_ACCEPT(&adapter->hw, status,
3616 rx_desc->errors, length, last_byte)) {
3617 spin_lock_irqsave(&adapter->stats_lock, flags);
3618 e1000_tbi_adjust_stats(&adapter->hw,
3619 &adapter->stats,
3620 length, skb->data);
3621 spin_unlock_irqrestore(&adapter->stats_lock,
3622 flags);
3623 length--;
3624 } else {
3625 /* recycle */
3626 buffer_info->skb = skb;
3627 goto next_desc;
3628 }
3629 }
3630
3631 /* code added for copybreak, this should improve
3632 * performance for small packets with large amounts
3633 * of reassembly being done in the stack */
3634 #define E1000_CB_LENGTH 256
3635 if (length < E1000_CB_LENGTH) {
3636 struct sk_buff *new_skb =
3637 dev_alloc_skb(length + NET_IP_ALIGN);
3638 if (new_skb) {
3639 skb_reserve(new_skb, NET_IP_ALIGN);
3640 new_skb->dev = netdev;
3641 memcpy(new_skb->data - NET_IP_ALIGN,
3642 skb->data - NET_IP_ALIGN,
3643 length + NET_IP_ALIGN);
3644 /* save the skb in buffer_info as good */
3645 buffer_info->skb = skb;
3646 skb = new_skb;
3647 skb_put(skb, length);
3648 }
3649 } else
3650 skb_put(skb, length);
3651
3652 /* end copybreak code */
3653
3654 /* Receive Checksum Offload */
3655 e1000_rx_checksum(adapter,
3656 (uint32_t)(status) |
3657 ((uint32_t)(rx_desc->errors) << 24),
3658 le16_to_cpu(rx_desc->csum), skb);
3659
3660 skb->protocol = eth_type_trans(skb, netdev);
3661 #ifdef CONFIG_E1000_NAPI
3662 if (unlikely(adapter->vlgrp &&
3663 (status & E1000_RXD_STAT_VP))) {
3664 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3665 le16_to_cpu(rx_desc->special) &
3666 E1000_RXD_SPC_VLAN_MASK);
3667 } else {
3668 netif_receive_skb(skb);
3669 }
3670 #else /* CONFIG_E1000_NAPI */
3671 if (unlikely(adapter->vlgrp &&
3672 (status & E1000_RXD_STAT_VP))) {
3673 vlan_hwaccel_rx(skb, adapter->vlgrp,
3674 le16_to_cpu(rx_desc->special) &
3675 E1000_RXD_SPC_VLAN_MASK);
3676 } else {
3677 netif_rx(skb);
3678 }
3679 #endif /* CONFIG_E1000_NAPI */
3680 netdev->last_rx = jiffies;
3681
3682 next_desc:
3683 rx_desc->status = 0;
3684
3685 /* return some buffers to hardware, one at a time is too slow */
3686 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3687 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3688 cleaned_count = 0;
3689 }
3690
3691 /* use prefetched values */
3692 rx_desc = next_rxd;
3693 buffer_info = next_buffer;
3694 }
3695 rx_ring->next_to_clean = i;
3696
3697 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3698 if (cleaned_count)
3699 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3700
3701 return cleaned;
3702 }
3703
3704 /**
3705 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3706 * @adapter: board private structure
3707 **/
3708
3709 static boolean_t
3710 #ifdef CONFIG_E1000_NAPI
3711 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3712 struct e1000_rx_ring *rx_ring,
3713 int *work_done, int work_to_do)
3714 #else
3715 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3716 struct e1000_rx_ring *rx_ring)
3717 #endif
3718 {
3719 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
3720 struct net_device *netdev = adapter->netdev;
3721 struct pci_dev *pdev = adapter->pdev;
3722 struct e1000_buffer *buffer_info, *next_buffer;
3723 struct e1000_ps_page *ps_page;
3724 struct e1000_ps_page_dma *ps_page_dma;
3725 struct sk_buff *skb;
3726 unsigned int i, j;
3727 uint32_t length, staterr;
3728 int cleaned_count = 0;
3729 boolean_t cleaned = FALSE;
3730
3731 i = rx_ring->next_to_clean;
3732 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3733 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3734 buffer_info = &rx_ring->buffer_info[i];
3735
3736 while (staterr & E1000_RXD_STAT_DD) {
3737 ps_page = &rx_ring->ps_page[i];
3738 ps_page_dma = &rx_ring->ps_page_dma[i];
3739 #ifdef CONFIG_E1000_NAPI
3740 if (unlikely(*work_done >= work_to_do))
3741 break;
3742 (*work_done)++;
3743 #endif
3744 skb = buffer_info->skb;
3745
3746 /* in the packet split case this is header only */
3747 prefetch(skb->data - NET_IP_ALIGN);
3748
3749 if (++i == rx_ring->count) i = 0;
3750 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
3751 prefetch(next_rxd);
3752
3753 next_buffer = &rx_ring->buffer_info[i];
3754
3755 cleaned = TRUE;
3756 cleaned_count++;
3757 pci_unmap_single(pdev, buffer_info->dma,
3758 buffer_info->length,
3759 PCI_DMA_FROMDEVICE);
3760
3761 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3762 E1000_DBG("%s: Packet Split buffers didn't pick up"
3763 " the full packet\n", netdev->name);
3764 dev_kfree_skb_irq(skb);
3765 goto next_desc;
3766 }
3767
3768 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3769 dev_kfree_skb_irq(skb);
3770 goto next_desc;
3771 }
3772
3773 length = le16_to_cpu(rx_desc->wb.middle.length0);
3774
3775 if (unlikely(!length)) {
3776 E1000_DBG("%s: Last part of the packet spanning"
3777 " multiple descriptors\n", netdev->name);
3778 dev_kfree_skb_irq(skb);
3779 goto next_desc;
3780 }
3781
3782 /* Good Receive */
3783 skb_put(skb, length);
3784
3785 {
3786 /* this looks ugly, but it seems compiler issues make it
3787 more efficient than reusing j */
3788 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
3789
3790 /* page alloc/put takes too long and effects small packet
3791 * throughput, so unsplit small packets and save the alloc/put*/
3792 if (l1 && ((length + l1) <= adapter->rx_ps_bsize0)) {
3793 u8 *vaddr;
3794 /* there is no documentation about how to call
3795 * kmap_atomic, so we can't hold the mapping
3796 * very long */
3797 pci_dma_sync_single_for_cpu(pdev,
3798 ps_page_dma->ps_page_dma[0],
3799 PAGE_SIZE,
3800 PCI_DMA_FROMDEVICE);
3801 vaddr = kmap_atomic(ps_page->ps_page[0],
3802 KM_SKB_DATA_SOFTIRQ);
3803 memcpy(skb->tail, vaddr, l1);
3804 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
3805 pci_dma_sync_single_for_device(pdev,
3806 ps_page_dma->ps_page_dma[0],
3807 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3808 skb_put(skb, l1);
3809 length += l1;
3810 goto copydone;
3811 } /* if */
3812 }
3813
3814 for (j = 0; j < adapter->rx_ps_pages; j++) {
3815 if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
3816 break;
3817 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3818 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3819 ps_page_dma->ps_page_dma[j] = 0;
3820 skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
3821 length);
3822 ps_page->ps_page[j] = NULL;
3823 skb->len += length;
3824 skb->data_len += length;
3825 skb->truesize += length;
3826 }
3827
3828 copydone:
3829 e1000_rx_checksum(adapter, staterr,
3830 le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
3831 skb->protocol = eth_type_trans(skb, netdev);
3832
3833 if (likely(rx_desc->wb.upper.header_status &
3834 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
3835 adapter->rx_hdr_split++;
3836 #ifdef CONFIG_E1000_NAPI
3837 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3838 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3839 le16_to_cpu(rx_desc->wb.middle.vlan) &
3840 E1000_RXD_SPC_VLAN_MASK);
3841 } else {
3842 netif_receive_skb(skb);
3843 }
3844 #else /* CONFIG_E1000_NAPI */
3845 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3846 vlan_hwaccel_rx(skb, adapter->vlgrp,
3847 le16_to_cpu(rx_desc->wb.middle.vlan) &
3848 E1000_RXD_SPC_VLAN_MASK);
3849 } else {
3850 netif_rx(skb);
3851 }
3852 #endif /* CONFIG_E1000_NAPI */
3853 netdev->last_rx = jiffies;
3854
3855 next_desc:
3856 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
3857 buffer_info->skb = NULL;
3858
3859 /* return some buffers to hardware, one at a time is too slow */
3860 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3861 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3862 cleaned_count = 0;
3863 }
3864
3865 /* use prefetched values */
3866 rx_desc = next_rxd;
3867 buffer_info = next_buffer;
3868
3869 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3870 }
3871 rx_ring->next_to_clean = i;
3872
3873 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3874 if (cleaned_count)
3875 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3876
3877 return cleaned;
3878 }
3879
3880 /**
3881 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3882 * @adapter: address of board private structure
3883 **/
3884
3885 static void
3886 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3887 struct e1000_rx_ring *rx_ring,
3888 int cleaned_count)
3889 {
3890 struct net_device *netdev = adapter->netdev;
3891 struct pci_dev *pdev = adapter->pdev;
3892 struct e1000_rx_desc *rx_desc;
3893 struct e1000_buffer *buffer_info;
3894 struct sk_buff *skb;
3895 unsigned int i;
3896 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3897
3898 i = rx_ring->next_to_use;
3899 buffer_info = &rx_ring->buffer_info[i];
3900
3901 while (cleaned_count--) {
3902 if (!(skb = buffer_info->skb))
3903 skb = dev_alloc_skb(bufsz);
3904 else {
3905 skb_trim(skb, 0);
3906 goto map_skb;
3907 }
3908
3909 if (unlikely(!skb)) {
3910 /* Better luck next round */
3911 adapter->alloc_rx_buff_failed++;
3912 break;
3913 }
3914
3915 /* Fix for errata 23, can't cross 64kB boundary */
3916 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3917 struct sk_buff *oldskb = skb;
3918 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3919 "at %p\n", bufsz, skb->data);
3920 /* Try again, without freeing the previous */
3921 skb = dev_alloc_skb(bufsz);
3922 /* Failed allocation, critical failure */
3923 if (!skb) {
3924 dev_kfree_skb(oldskb);
3925 break;
3926 }
3927
3928 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3929 /* give up */
3930 dev_kfree_skb(skb);
3931 dev_kfree_skb(oldskb);
3932 break; /* while !buffer_info->skb */
3933 } else {
3934 /* Use new allocation */
3935 dev_kfree_skb(oldskb);
3936 }
3937 }
3938 /* Make buffer alignment 2 beyond a 16 byte boundary
3939 * this will result in a 16 byte aligned IP header after
3940 * the 14 byte MAC header is removed
3941 */
3942 skb_reserve(skb, NET_IP_ALIGN);
3943
3944 skb->dev = netdev;
3945
3946 buffer_info->skb = skb;
3947 buffer_info->length = adapter->rx_buffer_len;
3948 map_skb:
3949 buffer_info->dma = pci_map_single(pdev,
3950 skb->data,
3951 adapter->rx_buffer_len,
3952 PCI_DMA_FROMDEVICE);
3953
3954 /* Fix for errata 23, can't cross 64kB boundary */
3955 if (!e1000_check_64k_bound(adapter,
3956 (void *)(unsigned long)buffer_info->dma,
3957 adapter->rx_buffer_len)) {
3958 DPRINTK(RX_ERR, ERR,
3959 "dma align check failed: %u bytes at %p\n",
3960 adapter->rx_buffer_len,
3961 (void *)(unsigned long)buffer_info->dma);
3962 dev_kfree_skb(skb);
3963 buffer_info->skb = NULL;
3964
3965 pci_unmap_single(pdev, buffer_info->dma,
3966 adapter->rx_buffer_len,
3967 PCI_DMA_FROMDEVICE);
3968
3969 break; /* while !buffer_info->skb */
3970 }
3971 rx_desc = E1000_RX_DESC(*rx_ring, i);
3972 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3973
3974 if (unlikely(++i == rx_ring->count))
3975 i = 0;
3976 buffer_info = &rx_ring->buffer_info[i];
3977 }
3978
3979 if (likely(rx_ring->next_to_use != i)) {
3980 rx_ring->next_to_use = i;
3981 if (unlikely(i-- == 0))
3982 i = (rx_ring->count - 1);
3983
3984 /* Force memory writes to complete before letting h/w
3985 * know there are new descriptors to fetch. (Only
3986 * applicable for weak-ordered memory model archs,
3987 * such as IA-64). */
3988 wmb();
3989 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3990 }
3991 }
3992
3993 /**
3994 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3995 * @adapter: address of board private structure
3996 **/
3997
3998 static void
3999 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4000 struct e1000_rx_ring *rx_ring,
4001 int cleaned_count)
4002 {
4003 struct net_device *netdev = adapter->netdev;
4004 struct pci_dev *pdev = adapter->pdev;
4005 union e1000_rx_desc_packet_split *rx_desc;
4006 struct e1000_buffer *buffer_info;
4007 struct e1000_ps_page *ps_page;
4008 struct e1000_ps_page_dma *ps_page_dma;
4009 struct sk_buff *skb;
4010 unsigned int i, j;
4011
4012 i = rx_ring->next_to_use;
4013 buffer_info = &rx_ring->buffer_info[i];
4014 ps_page = &rx_ring->ps_page[i];
4015 ps_page_dma = &rx_ring->ps_page_dma[i];
4016
4017 while (cleaned_count--) {
4018 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4019
4020 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4021 if (j < adapter->rx_ps_pages) {
4022 if (likely(!ps_page->ps_page[j])) {
4023 ps_page->ps_page[j] =
4024 alloc_page(GFP_ATOMIC);
4025 if (unlikely(!ps_page->ps_page[j])) {
4026 adapter->alloc_rx_buff_failed++;
4027 goto no_buffers;
4028 }
4029 ps_page_dma->ps_page_dma[j] =
4030 pci_map_page(pdev,
4031 ps_page->ps_page[j],
4032 0, PAGE_SIZE,
4033 PCI_DMA_FROMDEVICE);
4034 }
4035 /* Refresh the desc even if buffer_addrs didn't
4036 * change because each write-back erases
4037 * this info.
4038 */
4039 rx_desc->read.buffer_addr[j+1] =
4040 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4041 } else
4042 rx_desc->read.buffer_addr[j+1] = ~0;
4043 }
4044
4045 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4046
4047 if (unlikely(!skb)) {
4048 adapter->alloc_rx_buff_failed++;
4049 break;
4050 }
4051
4052 /* Make buffer alignment 2 beyond a 16 byte boundary
4053 * this will result in a 16 byte aligned IP header after
4054 * the 14 byte MAC header is removed
4055 */
4056 skb_reserve(skb, NET_IP_ALIGN);
4057
4058 skb->dev = netdev;
4059
4060 buffer_info->skb = skb;
4061 buffer_info->length = adapter->rx_ps_bsize0;
4062 buffer_info->dma = pci_map_single(pdev, skb->data,
4063 adapter->rx_ps_bsize0,
4064 PCI_DMA_FROMDEVICE);
4065
4066 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4067
4068 if (unlikely(++i == rx_ring->count)) i = 0;
4069 buffer_info = &rx_ring->buffer_info[i];
4070 ps_page = &rx_ring->ps_page[i];
4071 ps_page_dma = &rx_ring->ps_page_dma[i];
4072 }
4073
4074 no_buffers:
4075 if (likely(rx_ring->next_to_use != i)) {
4076 rx_ring->next_to_use = i;
4077 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4078
4079 /* Force memory writes to complete before letting h/w
4080 * know there are new descriptors to fetch. (Only
4081 * applicable for weak-ordered memory model archs,
4082 * such as IA-64). */
4083 wmb();
4084 /* Hardware increments by 16 bytes, but packet split
4085 * descriptors are 32 bytes...so we increment tail
4086 * twice as much.
4087 */
4088 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4089 }
4090 }
4091
4092 /**
4093 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4094 * @adapter:
4095 **/
4096
4097 static void
4098 e1000_smartspeed(struct e1000_adapter *adapter)
4099 {
4100 uint16_t phy_status;
4101 uint16_t phy_ctrl;
4102
4103 if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4104 !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4105 return;
4106
4107 if (adapter->smartspeed == 0) {
4108 /* If Master/Slave config fault is asserted twice,
4109 * we assume back-to-back */
4110 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4111 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4112 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4113 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4114 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4115 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4116 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4117 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4118 phy_ctrl);
4119 adapter->smartspeed++;
4120 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4121 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4122 &phy_ctrl)) {
4123 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4124 MII_CR_RESTART_AUTO_NEG);
4125 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4126 phy_ctrl);
4127 }
4128 }
4129 return;
4130 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4131 /* If still no link, perhaps using 2/3 pair cable */
4132 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4133 phy_ctrl |= CR_1000T_MS_ENABLE;
4134 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4135 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4136 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4137 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4138 MII_CR_RESTART_AUTO_NEG);
4139 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4140 }
4141 }
4142 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4143 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4144 adapter->smartspeed = 0;
4145 }
4146
4147 /**
4148 * e1000_ioctl -
4149 * @netdev:
4150 * @ifreq:
4151 * @cmd:
4152 **/
4153
4154 static int
4155 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4156 {
4157 switch (cmd) {
4158 case SIOCGMIIPHY:
4159 case SIOCGMIIREG:
4160 case SIOCSMIIREG:
4161 return e1000_mii_ioctl(netdev, ifr, cmd);
4162 default:
4163 return -EOPNOTSUPP;
4164 }
4165 }
4166
4167 /**
4168 * e1000_mii_ioctl -
4169 * @netdev:
4170 * @ifreq:
4171 * @cmd:
4172 **/
4173
4174 static int
4175 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4176 {
4177 struct e1000_adapter *adapter = netdev_priv(netdev);
4178 struct mii_ioctl_data *data = if_mii(ifr);
4179 int retval;
4180 uint16_t mii_reg;
4181 uint16_t spddplx;
4182 unsigned long flags;
4183
4184 if (adapter->hw.media_type != e1000_media_type_copper)
4185 return -EOPNOTSUPP;
4186
4187 switch (cmd) {
4188 case SIOCGMIIPHY:
4189 data->phy_id = adapter->hw.phy_addr;
4190 break;
4191 case SIOCGMIIREG:
4192 if (!capable(CAP_NET_ADMIN))
4193 return -EPERM;
4194 spin_lock_irqsave(&adapter->stats_lock, flags);
4195 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4196 &data->val_out)) {
4197 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4198 return -EIO;
4199 }
4200 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4201 break;
4202 case SIOCSMIIREG:
4203 if (!capable(CAP_NET_ADMIN))
4204 return -EPERM;
4205 if (data->reg_num & ~(0x1F))
4206 return -EFAULT;
4207 mii_reg = data->val_in;
4208 spin_lock_irqsave(&adapter->stats_lock, flags);
4209 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4210 mii_reg)) {
4211 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4212 return -EIO;
4213 }
4214 if (adapter->hw.media_type == e1000_media_type_copper) {
4215 switch (data->reg_num) {
4216 case PHY_CTRL:
4217 if (mii_reg & MII_CR_POWER_DOWN)
4218 break;
4219 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4220 adapter->hw.autoneg = 1;
4221 adapter->hw.autoneg_advertised = 0x2F;
4222 } else {
4223 if (mii_reg & 0x40)
4224 spddplx = SPEED_1000;
4225 else if (mii_reg & 0x2000)
4226 spddplx = SPEED_100;
4227 else
4228 spddplx = SPEED_10;
4229 spddplx += (mii_reg & 0x100)
4230 ? DUPLEX_FULL :
4231 DUPLEX_HALF;
4232 retval = e1000_set_spd_dplx(adapter,
4233 spddplx);
4234 if (retval) {
4235 spin_unlock_irqrestore(
4236 &adapter->stats_lock,
4237 flags);
4238 return retval;
4239 }
4240 }
4241 if (netif_running(adapter->netdev))
4242 e1000_reinit_locked(adapter);
4243 else
4244 e1000_reset(adapter);
4245 break;
4246 case M88E1000_PHY_SPEC_CTRL:
4247 case M88E1000_EXT_PHY_SPEC_CTRL:
4248 if (e1000_phy_reset(&adapter->hw)) {
4249 spin_unlock_irqrestore(
4250 &adapter->stats_lock, flags);
4251 return -EIO;
4252 }
4253 break;
4254 }
4255 } else {
4256 switch (data->reg_num) {
4257 case PHY_CTRL:
4258 if (mii_reg & MII_CR_POWER_DOWN)
4259 break;
4260 if (netif_running(adapter->netdev))
4261 e1000_reinit_locked(adapter);
4262 else
4263 e1000_reset(adapter);
4264 break;
4265 }
4266 }
4267 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4268 break;
4269 default:
4270 return -EOPNOTSUPP;
4271 }
4272 return E1000_SUCCESS;
4273 }
4274
4275 void
4276 e1000_pci_set_mwi(struct e1000_hw *hw)
4277 {
4278 struct e1000_adapter *adapter = hw->back;
4279 int ret_val = pci_set_mwi(adapter->pdev);
4280
4281 if (ret_val)
4282 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4283 }
4284
4285 void
4286 e1000_pci_clear_mwi(struct e1000_hw *hw)
4287 {
4288 struct e1000_adapter *adapter = hw->back;
4289
4290 pci_clear_mwi(adapter->pdev);
4291 }
4292
4293 void
4294 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4295 {
4296 struct e1000_adapter *adapter = hw->back;
4297
4298 pci_read_config_word(adapter->pdev, reg, value);
4299 }
4300
4301 void
4302 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4303 {
4304 struct e1000_adapter *adapter = hw->back;
4305
4306 pci_write_config_word(adapter->pdev, reg, *value);
4307 }
4308
4309 uint32_t
4310 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4311 {
4312 return inl(port);
4313 }
4314
4315 void
4316 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4317 {
4318 outl(value, port);
4319 }
4320
4321 static void
4322 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4323 {
4324 struct e1000_adapter *adapter = netdev_priv(netdev);
4325 uint32_t ctrl, rctl;
4326
4327 e1000_irq_disable(adapter);
4328 adapter->vlgrp = grp;
4329
4330 if (grp) {
4331 /* enable VLAN tag insert/strip */
4332 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4333 ctrl |= E1000_CTRL_VME;
4334 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4335
4336 /* enable VLAN receive filtering */
4337 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4338 rctl |= E1000_RCTL_VFE;
4339 rctl &= ~E1000_RCTL_CFIEN;
4340 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4341 e1000_update_mng_vlan(adapter);
4342 } else {
4343 /* disable VLAN tag insert/strip */
4344 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4345 ctrl &= ~E1000_CTRL_VME;
4346 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4347
4348 /* disable VLAN filtering */
4349 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4350 rctl &= ~E1000_RCTL_VFE;
4351 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4352 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4353 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4354 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4355 }
4356 }
4357
4358 e1000_irq_enable(adapter);
4359 }
4360
4361 static void
4362 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4363 {
4364 struct e1000_adapter *adapter = netdev_priv(netdev);
4365 uint32_t vfta, index;
4366
4367 if ((adapter->hw.mng_cookie.status &
4368 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4369 (vid == adapter->mng_vlan_id))
4370 return;
4371 /* add VID to filter table */
4372 index = (vid >> 5) & 0x7F;
4373 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4374 vfta |= (1 << (vid & 0x1F));
4375 e1000_write_vfta(&adapter->hw, index, vfta);
4376 }
4377
4378 static void
4379 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4380 {
4381 struct e1000_adapter *adapter = netdev_priv(netdev);
4382 uint32_t vfta, index;
4383
4384 e1000_irq_disable(adapter);
4385
4386 if (adapter->vlgrp)
4387 adapter->vlgrp->vlan_devices[vid] = NULL;
4388
4389 e1000_irq_enable(adapter);
4390
4391 if ((adapter->hw.mng_cookie.status &
4392 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4393 (vid == adapter->mng_vlan_id)) {
4394 /* release control to f/w */
4395 e1000_release_hw_control(adapter);
4396 return;
4397 }
4398
4399 /* remove VID from filter table */
4400 index = (vid >> 5) & 0x7F;
4401 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4402 vfta &= ~(1 << (vid & 0x1F));
4403 e1000_write_vfta(&adapter->hw, index, vfta);
4404 }
4405
4406 static void
4407 e1000_restore_vlan(struct e1000_adapter *adapter)
4408 {
4409 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4410
4411 if (adapter->vlgrp) {
4412 uint16_t vid;
4413 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4414 if (!adapter->vlgrp->vlan_devices[vid])
4415 continue;
4416 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4417 }
4418 }
4419 }
4420
4421 int
4422 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4423 {
4424 adapter->hw.autoneg = 0;
4425
4426 /* Fiber NICs only allow 1000 gbps Full duplex */
4427 if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4428 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4429 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4430 return -EINVAL;
4431 }
4432
4433 switch (spddplx) {
4434 case SPEED_10 + DUPLEX_HALF:
4435 adapter->hw.forced_speed_duplex = e1000_10_half;
4436 break;
4437 case SPEED_10 + DUPLEX_FULL:
4438 adapter->hw.forced_speed_duplex = e1000_10_full;
4439 break;
4440 case SPEED_100 + DUPLEX_HALF:
4441 adapter->hw.forced_speed_duplex = e1000_100_half;
4442 break;
4443 case SPEED_100 + DUPLEX_FULL:
4444 adapter->hw.forced_speed_duplex = e1000_100_full;
4445 break;
4446 case SPEED_1000 + DUPLEX_FULL:
4447 adapter->hw.autoneg = 1;
4448 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4449 break;
4450 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4451 default:
4452 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4453 return -EINVAL;
4454 }
4455 return 0;
4456 }
4457
4458 #ifdef CONFIG_PM
4459 /* Save/restore 16 or 64 dwords of PCI config space depending on which
4460 * bus we're on (PCI(X) vs. PCI-E)
4461 */
4462 #define PCIE_CONFIG_SPACE_LEN 256
4463 #define PCI_CONFIG_SPACE_LEN 64
4464 static int
4465 e1000_pci_save_state(struct e1000_adapter *adapter)
4466 {
4467 struct pci_dev *dev = adapter->pdev;
4468 int size;
4469 int i;
4470
4471 if (adapter->hw.mac_type >= e1000_82571)
4472 size = PCIE_CONFIG_SPACE_LEN;
4473 else
4474 size = PCI_CONFIG_SPACE_LEN;
4475
4476 WARN_ON(adapter->config_space != NULL);
4477
4478 adapter->config_space = kmalloc(size, GFP_KERNEL);
4479 if (!adapter->config_space) {
4480 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4481 return -ENOMEM;
4482 }
4483 for (i = 0; i < (size / 4); i++)
4484 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4485 return 0;
4486 }
4487
4488 static void
4489 e1000_pci_restore_state(struct e1000_adapter *adapter)
4490 {
4491 struct pci_dev *dev = adapter->pdev;
4492 int size;
4493 int i;
4494
4495 if (adapter->config_space == NULL)
4496 return;
4497
4498 if (adapter->hw.mac_type >= e1000_82571)
4499 size = PCIE_CONFIG_SPACE_LEN;
4500 else
4501 size = PCI_CONFIG_SPACE_LEN;
4502 for (i = 0; i < (size / 4); i++)
4503 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4504 kfree(adapter->config_space);
4505 adapter->config_space = NULL;
4506 return;
4507 }
4508 #endif /* CONFIG_PM */
4509
4510 static int
4511 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4512 {
4513 struct net_device *netdev = pci_get_drvdata(pdev);
4514 struct e1000_adapter *adapter = netdev_priv(netdev);
4515 uint32_t ctrl, ctrl_ext, rctl, manc, status;
4516 uint32_t wufc = adapter->wol;
4517 #ifdef CONFIG_PM
4518 int retval = 0;
4519 #endif
4520
4521 netif_device_detach(netdev);
4522
4523 if (netif_running(netdev)) {
4524 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4525 e1000_down(adapter);
4526 }
4527
4528 #ifdef CONFIG_PM
4529 /* Implement our own version of pci_save_state(pdev) because pci-
4530 * express adapters have 256-byte config spaces. */
4531 retval = e1000_pci_save_state(adapter);
4532 if (retval)
4533 return retval;
4534 #endif
4535
4536 status = E1000_READ_REG(&adapter->hw, STATUS);
4537 if (status & E1000_STATUS_LU)
4538 wufc &= ~E1000_WUFC_LNKC;
4539
4540 if (wufc) {
4541 e1000_setup_rctl(adapter);
4542 e1000_set_multi(netdev);
4543
4544 /* turn on all-multi mode if wake on multicast is enabled */
4545 if (adapter->wol & E1000_WUFC_MC) {
4546 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4547 rctl |= E1000_RCTL_MPE;
4548 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4549 }
4550
4551 if (adapter->hw.mac_type >= e1000_82540) {
4552 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4553 /* advertise wake from D3Cold */
4554 #define E1000_CTRL_ADVD3WUC 0x00100000
4555 /* phy power management enable */
4556 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4557 ctrl |= E1000_CTRL_ADVD3WUC |
4558 E1000_CTRL_EN_PHY_PWR_MGMT;
4559 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4560 }
4561
4562 if (adapter->hw.media_type == e1000_media_type_fiber ||
4563 adapter->hw.media_type == e1000_media_type_internal_serdes) {
4564 /* keep the laser running in D3 */
4565 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4566 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4567 E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4568 }
4569
4570 /* Allow time for pending master requests to run */
4571 e1000_disable_pciex_master(&adapter->hw);
4572
4573 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4574 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4575 pci_enable_wake(pdev, PCI_D3hot, 1);
4576 pci_enable_wake(pdev, PCI_D3cold, 1);
4577 } else {
4578 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4579 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4580 pci_enable_wake(pdev, PCI_D3hot, 0);
4581 pci_enable_wake(pdev, PCI_D3cold, 0);
4582 }
4583
4584 if (adapter->hw.mac_type >= e1000_82540 &&
4585 adapter->hw.media_type == e1000_media_type_copper) {
4586 manc = E1000_READ_REG(&adapter->hw, MANC);
4587 if (manc & E1000_MANC_SMBUS_EN) {
4588 manc |= E1000_MANC_ARP_EN;
4589 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4590 pci_enable_wake(pdev, PCI_D3hot, 1);
4591 pci_enable_wake(pdev, PCI_D3cold, 1);
4592 }
4593 }
4594
4595 /* Release control of h/w to f/w. If f/w is AMT enabled, this
4596 * would have already happened in close and is redundant. */
4597 e1000_release_hw_control(adapter);
4598
4599 pci_disable_device(pdev);
4600
4601 pci_set_power_state(pdev, pci_choose_state(pdev, state));
4602
4603 return 0;
4604 }
4605
4606 #ifdef CONFIG_PM
4607 static int
4608 e1000_resume(struct pci_dev *pdev)
4609 {
4610 struct net_device *netdev = pci_get_drvdata(pdev);
4611 struct e1000_adapter *adapter = netdev_priv(netdev);
4612 uint32_t manc, ret_val;
4613
4614 pci_set_power_state(pdev, PCI_D0);
4615 e1000_pci_restore_state(adapter);
4616 ret_val = pci_enable_device(pdev);
4617 pci_set_master(pdev);
4618
4619 pci_enable_wake(pdev, PCI_D3hot, 0);
4620 pci_enable_wake(pdev, PCI_D3cold, 0);
4621
4622 e1000_reset(adapter);
4623 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4624
4625 if (netif_running(netdev))
4626 e1000_up(adapter);
4627
4628 netif_device_attach(netdev);
4629
4630 if (adapter->hw.mac_type >= e1000_82540 &&
4631 adapter->hw.media_type == e1000_media_type_copper) {
4632 manc = E1000_READ_REG(&adapter->hw, MANC);
4633 manc &= ~(E1000_MANC_ARP_EN);
4634 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4635 }
4636
4637 /* If the controller is 82573 and f/w is AMT, do not set
4638 * DRV_LOAD until the interface is up. For all other cases,
4639 * let the f/w know that the h/w is now under the control
4640 * of the driver. */
4641 if (adapter->hw.mac_type != e1000_82573 ||
4642 !e1000_check_mng_mode(&adapter->hw))
4643 e1000_get_hw_control(adapter);
4644
4645 return 0;
4646 }
4647 #endif
4648
4649 static void e1000_shutdown(struct pci_dev *pdev)
4650 {
4651 e1000_suspend(pdev, PMSG_SUSPEND);
4652 }
4653
4654 #ifdef CONFIG_NET_POLL_CONTROLLER
4655 /*
4656 * Polling 'interrupt' - used by things like netconsole to send skbs
4657 * without having to re-enable interrupts. It's not called while
4658 * the interrupt routine is executing.
4659 */
4660 static void
4661 e1000_netpoll(struct net_device *netdev)
4662 {
4663 struct e1000_adapter *adapter = netdev_priv(netdev);
4664 disable_irq(adapter->pdev->irq);
4665 e1000_intr(adapter->pdev->irq, netdev, NULL);
4666 e1000_clean_tx_irq(adapter, adapter->tx_ring);
4667 #ifndef CONFIG_E1000_NAPI
4668 adapter->clean_rx(adapter, adapter->rx_ring);
4669 #endif
4670 enable_irq(adapter->pdev->irq);
4671 }
4672 #endif
4673
4674 /**
4675 * e1000_io_error_detected - called when PCI error is detected
4676 * @pdev: Pointer to PCI device
4677 * @state: The current pci conneection state
4678 *
4679 * This function is called after a PCI bus error affecting
4680 * this device has been detected.
4681 */
4682 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
4683 {
4684 struct net_device *netdev = pci_get_drvdata(pdev);
4685 struct e1000_adapter *adapter = netdev->priv;
4686
4687 netif_device_detach(netdev);
4688
4689 if (netif_running(netdev))
4690 e1000_down(adapter);
4691
4692 /* Request a slot slot reset. */
4693 return PCI_ERS_RESULT_NEED_RESET;
4694 }
4695
4696 /**
4697 * e1000_io_slot_reset - called after the pci bus has been reset.
4698 * @pdev: Pointer to PCI device
4699 *
4700 * Restart the card from scratch, as if from a cold-boot. Implementation
4701 * resembles the first-half of the e1000_resume routine.
4702 */
4703 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4704 {
4705 struct net_device *netdev = pci_get_drvdata(pdev);
4706 struct e1000_adapter *adapter = netdev->priv;
4707
4708 if (pci_enable_device(pdev)) {
4709 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4710 return PCI_ERS_RESULT_DISCONNECT;
4711 }
4712 pci_set_master(pdev);
4713
4714 pci_enable_wake(pdev, 3, 0);
4715 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
4716
4717 /* Perform card reset only on one instance of the card */
4718 if (PCI_FUNC (pdev->devfn) != 0)
4719 return PCI_ERS_RESULT_RECOVERED;
4720
4721 e1000_reset(adapter);
4722 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4723
4724 return PCI_ERS_RESULT_RECOVERED;
4725 }
4726
4727 /**
4728 * e1000_io_resume - called when traffic can start flowing again.
4729 * @pdev: Pointer to PCI device
4730 *
4731 * This callback is called when the error recovery driver tells us that
4732 * its OK to resume normal operation. Implementation resembles the
4733 * second-half of the e1000_resume routine.
4734 */
4735 static void e1000_io_resume(struct pci_dev *pdev)
4736 {
4737 struct net_device *netdev = pci_get_drvdata(pdev);
4738 struct e1000_adapter *adapter = netdev->priv;
4739 uint32_t manc, swsm;
4740
4741 if (netif_running(netdev)) {
4742 if (e1000_up(adapter)) {
4743 printk("e1000: can't bring device back up after reset\n");
4744 return;
4745 }
4746 }
4747
4748 netif_device_attach(netdev);
4749
4750 if (adapter->hw.mac_type >= e1000_82540 &&
4751 adapter->hw.media_type == e1000_media_type_copper) {
4752 manc = E1000_READ_REG(&adapter->hw, MANC);
4753 manc &= ~(E1000_MANC_ARP_EN);
4754 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4755 }
4756
4757 switch (adapter->hw.mac_type) {
4758 case e1000_82573:
4759 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4760 E1000_WRITE_REG(&adapter->hw, SWSM,
4761 swsm | E1000_SWSM_DRV_LOAD);
4762 break;
4763 default:
4764 break;
4765 }
4766
4767 if (netif_running(netdev))
4768 mod_timer(&adapter->watchdog_timer, jiffies);
4769 }
4770
4771 /* e1000_main.c */
kernel-based virtual machine