]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/net/e1000/e1000_main.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
netdev: add more functions to netdevice ops
[mirror_ubuntu-bionic-kernel.git] / drivers / net / e1000 / e1000_main.c
1 /*******************************************************************************
2
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27 *******************************************************************************/
28
29 #include "e1000.h"
30 #include <net/ip6_checksum.h>
31
32 char e1000_driver_name[] = "e1000";
33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
34 #define DRV_VERSION "7.3.20-k3-NAPI"
35 const char e1000_driver_version[] = DRV_VERSION;
36 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
37
38 /* e1000_pci_tbl - PCI Device ID Table
39 *
40 * Last entry must be all 0s
41 *
42 * Macro expands to...
43 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
44 */
45 static struct pci_device_id e1000_pci_tbl[] = {
46 INTEL_E1000_ETHERNET_DEVICE(0x1000),
47 INTEL_E1000_ETHERNET_DEVICE(0x1001),
48 INTEL_E1000_ETHERNET_DEVICE(0x1004),
49 INTEL_E1000_ETHERNET_DEVICE(0x1008),
50 INTEL_E1000_ETHERNET_DEVICE(0x1009),
51 INTEL_E1000_ETHERNET_DEVICE(0x100C),
52 INTEL_E1000_ETHERNET_DEVICE(0x100D),
53 INTEL_E1000_ETHERNET_DEVICE(0x100E),
54 INTEL_E1000_ETHERNET_DEVICE(0x100F),
55 INTEL_E1000_ETHERNET_DEVICE(0x1010),
56 INTEL_E1000_ETHERNET_DEVICE(0x1011),
57 INTEL_E1000_ETHERNET_DEVICE(0x1012),
58 INTEL_E1000_ETHERNET_DEVICE(0x1013),
59 INTEL_E1000_ETHERNET_DEVICE(0x1014),
60 INTEL_E1000_ETHERNET_DEVICE(0x1015),
61 INTEL_E1000_ETHERNET_DEVICE(0x1016),
62 INTEL_E1000_ETHERNET_DEVICE(0x1017),
63 INTEL_E1000_ETHERNET_DEVICE(0x1018),
64 INTEL_E1000_ETHERNET_DEVICE(0x1019),
65 INTEL_E1000_ETHERNET_DEVICE(0x101A),
66 INTEL_E1000_ETHERNET_DEVICE(0x101D),
67 INTEL_E1000_ETHERNET_DEVICE(0x101E),
68 INTEL_E1000_ETHERNET_DEVICE(0x1026),
69 INTEL_E1000_ETHERNET_DEVICE(0x1027),
70 INTEL_E1000_ETHERNET_DEVICE(0x1028),
71 INTEL_E1000_ETHERNET_DEVICE(0x1075),
72 INTEL_E1000_ETHERNET_DEVICE(0x1076),
73 INTEL_E1000_ETHERNET_DEVICE(0x1077),
74 INTEL_E1000_ETHERNET_DEVICE(0x1078),
75 INTEL_E1000_ETHERNET_DEVICE(0x1079),
76 INTEL_E1000_ETHERNET_DEVICE(0x107A),
77 INTEL_E1000_ETHERNET_DEVICE(0x107B),
78 INTEL_E1000_ETHERNET_DEVICE(0x107C),
79 INTEL_E1000_ETHERNET_DEVICE(0x108A),
80 INTEL_E1000_ETHERNET_DEVICE(0x1099),
81 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
82 /* required last entry */
83 {0,}
84 };
85
86 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
87
88 int e1000_up(struct e1000_adapter *adapter);
89 void e1000_down(struct e1000_adapter *adapter);
90 void e1000_reinit_locked(struct e1000_adapter *adapter);
91 void e1000_reset(struct e1000_adapter *adapter);
92 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx);
93 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
94 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
95 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
96 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
97 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
98 struct e1000_tx_ring *txdr);
99 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
100 struct e1000_rx_ring *rxdr);
101 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
102 struct e1000_tx_ring *tx_ring);
103 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
104 struct e1000_rx_ring *rx_ring);
105 void e1000_update_stats(struct e1000_adapter *adapter);
106
107 static int e1000_init_module(void);
108 static void e1000_exit_module(void);
109 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
110 static void __devexit e1000_remove(struct pci_dev *pdev);
111 static int e1000_alloc_queues(struct e1000_adapter *adapter);
112 static int e1000_sw_init(struct e1000_adapter *adapter);
113 static int e1000_open(struct net_device *netdev);
114 static int e1000_close(struct net_device *netdev);
115 static void e1000_configure_tx(struct e1000_adapter *adapter);
116 static void e1000_configure_rx(struct e1000_adapter *adapter);
117 static void e1000_setup_rctl(struct e1000_adapter *adapter);
118 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
119 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
120 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
121 struct e1000_tx_ring *tx_ring);
122 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
123 struct e1000_rx_ring *rx_ring);
124 static void e1000_set_rx_mode(struct net_device *netdev);
125 static void e1000_update_phy_info(unsigned long data);
126 static void e1000_watchdog(unsigned long data);
127 static void e1000_82547_tx_fifo_stall(unsigned long data);
128 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
129 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
130 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
131 static int e1000_set_mac(struct net_device *netdev, void *p);
132 static irqreturn_t e1000_intr(int irq, void *data);
133 static irqreturn_t e1000_intr_msi(int irq, void *data);
134 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
135 struct e1000_tx_ring *tx_ring);
136 static int e1000_clean(struct napi_struct *napi, int budget);
137 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
138 struct e1000_rx_ring *rx_ring,
139 int *work_done, int work_to_do);
140 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
141 struct e1000_rx_ring *rx_ring,
142 int cleaned_count);
143 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
144 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
145 int cmd);
146 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
147 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
148 static void e1000_tx_timeout(struct net_device *dev);
149 static void e1000_reset_task(struct work_struct *work);
150 static void e1000_smartspeed(struct e1000_adapter *adapter);
151 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
152 struct sk_buff *skb);
153
154 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
155 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
156 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
157 static void e1000_restore_vlan(struct e1000_adapter *adapter);
158
159 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
160 #ifdef CONFIG_PM
161 static int e1000_resume(struct pci_dev *pdev);
162 #endif
163 static void e1000_shutdown(struct pci_dev *pdev);
164
165 #ifdef CONFIG_NET_POLL_CONTROLLER
166 /* for netdump / net console */
167 static void e1000_netpoll (struct net_device *netdev);
168 #endif
169
170 #define COPYBREAK_DEFAULT 256
171 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
172 module_param(copybreak, uint, 0644);
173 MODULE_PARM_DESC(copybreak,
174 "Maximum size of packet that is copied to a new buffer on receive");
175
176 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
177 pci_channel_state_t state);
178 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
179 static void e1000_io_resume(struct pci_dev *pdev);
180
181 static struct pci_error_handlers e1000_err_handler = {
182 .error_detected = e1000_io_error_detected,
183 .slot_reset = e1000_io_slot_reset,
184 .resume = e1000_io_resume,
185 };
186
187 static struct pci_driver e1000_driver = {
188 .name = e1000_driver_name,
189 .id_table = e1000_pci_tbl,
190 .probe = e1000_probe,
191 .remove = __devexit_p(e1000_remove),
192 #ifdef CONFIG_PM
193 /* Power Managment Hooks */
194 .suspend = e1000_suspend,
195 .resume = e1000_resume,
196 #endif
197 .shutdown = e1000_shutdown,
198 .err_handler = &e1000_err_handler
199 };
200
201 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
202 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
203 MODULE_LICENSE("GPL");
204 MODULE_VERSION(DRV_VERSION);
205
206 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
207 module_param(debug, int, 0);
208 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
209
210 /**
211 * e1000_init_module - Driver Registration Routine
212 *
213 * e1000_init_module is the first routine called when the driver is
214 * loaded. All it does is register with the PCI subsystem.
215 **/
216
217 static int __init e1000_init_module(void)
218 {
219 int ret;
220 printk(KERN_INFO "%s - version %s\n",
221 e1000_driver_string, e1000_driver_version);
222
223 printk(KERN_INFO "%s\n", e1000_copyright);
224
225 ret = pci_register_driver(&e1000_driver);
226 if (copybreak != COPYBREAK_DEFAULT) {
227 if (copybreak == 0)
228 printk(KERN_INFO "e1000: copybreak disabled\n");
229 else
230 printk(KERN_INFO "e1000: copybreak enabled for "
231 "packets <= %u bytes\n", copybreak);
232 }
233 return ret;
234 }
235
236 module_init(e1000_init_module);
237
238 /**
239 * e1000_exit_module - Driver Exit Cleanup Routine
240 *
241 * e1000_exit_module is called just before the driver is removed
242 * from memory.
243 **/
244
245 static void __exit e1000_exit_module(void)
246 {
247 pci_unregister_driver(&e1000_driver);
248 }
249
250 module_exit(e1000_exit_module);
251
252 static int e1000_request_irq(struct e1000_adapter *adapter)
253 {
254 struct e1000_hw *hw = &adapter->hw;
255 struct net_device *netdev = adapter->netdev;
256 irq_handler_t handler = e1000_intr;
257 int irq_flags = IRQF_SHARED;
258 int err;
259
260 if (hw->mac_type >= e1000_82571) {
261 adapter->have_msi = !pci_enable_msi(adapter->pdev);
262 if (adapter->have_msi) {
263 handler = e1000_intr_msi;
264 irq_flags = 0;
265 }
266 }
267
268 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
269 netdev);
270 if (err) {
271 if (adapter->have_msi)
272 pci_disable_msi(adapter->pdev);
273 DPRINTK(PROBE, ERR,
274 "Unable to allocate interrupt Error: %d\n", err);
275 }
276
277 return err;
278 }
279
280 static void e1000_free_irq(struct e1000_adapter *adapter)
281 {
282 struct net_device *netdev = adapter->netdev;
283
284 free_irq(adapter->pdev->irq, netdev);
285
286 if (adapter->have_msi)
287 pci_disable_msi(adapter->pdev);
288 }
289
290 /**
291 * e1000_irq_disable - Mask off interrupt generation on the NIC
292 * @adapter: board private structure
293 **/
294
295 static void e1000_irq_disable(struct e1000_adapter *adapter)
296 {
297 struct e1000_hw *hw = &adapter->hw;
298
299 ew32(IMC, ~0);
300 E1000_WRITE_FLUSH();
301 synchronize_irq(adapter->pdev->irq);
302 }
303
304 /**
305 * e1000_irq_enable - Enable default interrupt generation settings
306 * @adapter: board private structure
307 **/
308
309 static void e1000_irq_enable(struct e1000_adapter *adapter)
310 {
311 struct e1000_hw *hw = &adapter->hw;
312
313 ew32(IMS, IMS_ENABLE_MASK);
314 E1000_WRITE_FLUSH();
315 }
316
317 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
318 {
319 struct e1000_hw *hw = &adapter->hw;
320 struct net_device *netdev = adapter->netdev;
321 u16 vid = hw->mng_cookie.vlan_id;
322 u16 old_vid = adapter->mng_vlan_id;
323 if (adapter->vlgrp) {
324 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
325 if (hw->mng_cookie.status &
326 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
327 e1000_vlan_rx_add_vid(netdev, vid);
328 adapter->mng_vlan_id = vid;
329 } else
330 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
331
332 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
333 (vid != old_vid) &&
334 !vlan_group_get_device(adapter->vlgrp, old_vid))
335 e1000_vlan_rx_kill_vid(netdev, old_vid);
336 } else
337 adapter->mng_vlan_id = vid;
338 }
339 }
340
341 /**
342 * e1000_release_hw_control - release control of the h/w to f/w
343 * @adapter: address of board private structure
344 *
345 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
346 * For ASF and Pass Through versions of f/w this means that the
347 * driver is no longer loaded. For AMT version (only with 82573) i
348 * of the f/w this means that the network i/f is closed.
349 *
350 **/
351
352 static void e1000_release_hw_control(struct e1000_adapter *adapter)
353 {
354 u32 ctrl_ext;
355 u32 swsm;
356 struct e1000_hw *hw = &adapter->hw;
357
358 /* Let firmware taken over control of h/w */
359 switch (hw->mac_type) {
360 case e1000_82573:
361 swsm = er32(SWSM);
362 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
363 break;
364 case e1000_82571:
365 case e1000_82572:
366 case e1000_80003es2lan:
367 case e1000_ich8lan:
368 ctrl_ext = er32(CTRL_EXT);
369 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
370 break;
371 default:
372 break;
373 }
374 }
375
376 /**
377 * e1000_get_hw_control - get control of the h/w from f/w
378 * @adapter: address of board private structure
379 *
380 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
381 * For ASF and Pass Through versions of f/w this means that
382 * the driver is loaded. For AMT version (only with 82573)
383 * of the f/w this means that the network i/f is open.
384 *
385 **/
386
387 static void e1000_get_hw_control(struct e1000_adapter *adapter)
388 {
389 u32 ctrl_ext;
390 u32 swsm;
391 struct e1000_hw *hw = &adapter->hw;
392
393 /* Let firmware know the driver has taken over */
394 switch (hw->mac_type) {
395 case e1000_82573:
396 swsm = er32(SWSM);
397 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
398 break;
399 case e1000_82571:
400 case e1000_82572:
401 case e1000_80003es2lan:
402 case e1000_ich8lan:
403 ctrl_ext = er32(CTRL_EXT);
404 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
405 break;
406 default:
407 break;
408 }
409 }
410
411 static void e1000_init_manageability(struct e1000_adapter *adapter)
412 {
413 struct e1000_hw *hw = &adapter->hw;
414
415 if (adapter->en_mng_pt) {
416 u32 manc = er32(MANC);
417
418 /* disable hardware interception of ARP */
419 manc &= ~(E1000_MANC_ARP_EN);
420
421 /* enable receiving management packets to the host */
422 /* this will probably generate destination unreachable messages
423 * from the host OS, but the packets will be handled on SMBUS */
424 if (hw->has_manc2h) {
425 u32 manc2h = er32(MANC2H);
426
427 manc |= E1000_MANC_EN_MNG2HOST;
428 #define E1000_MNG2HOST_PORT_623 (1 << 5)
429 #define E1000_MNG2HOST_PORT_664 (1 << 6)
430 manc2h |= E1000_MNG2HOST_PORT_623;
431 manc2h |= E1000_MNG2HOST_PORT_664;
432 ew32(MANC2H, manc2h);
433 }
434
435 ew32(MANC, manc);
436 }
437 }
438
439 static void e1000_release_manageability(struct e1000_adapter *adapter)
440 {
441 struct e1000_hw *hw = &adapter->hw;
442
443 if (adapter->en_mng_pt) {
444 u32 manc = er32(MANC);
445
446 /* re-enable hardware interception of ARP */
447 manc |= E1000_MANC_ARP_EN;
448
449 if (hw->has_manc2h)
450 manc &= ~E1000_MANC_EN_MNG2HOST;
451
452 /* don't explicitly have to mess with MANC2H since
453 * MANC has an enable disable that gates MANC2H */
454
455 ew32(MANC, manc);
456 }
457 }
458
459 /**
460 * e1000_configure - configure the hardware for RX and TX
461 * @adapter = private board structure
462 **/
463 static void e1000_configure(struct e1000_adapter *adapter)
464 {
465 struct net_device *netdev = adapter->netdev;
466 int i;
467
468 e1000_set_rx_mode(netdev);
469
470 e1000_restore_vlan(adapter);
471 e1000_init_manageability(adapter);
472
473 e1000_configure_tx(adapter);
474 e1000_setup_rctl(adapter);
475 e1000_configure_rx(adapter);
476 /* call E1000_DESC_UNUSED which always leaves
477 * at least 1 descriptor unused to make sure
478 * next_to_use != next_to_clean */
479 for (i = 0; i < adapter->num_rx_queues; i++) {
480 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
481 adapter->alloc_rx_buf(adapter, ring,
482 E1000_DESC_UNUSED(ring));
483 }
484
485 adapter->tx_queue_len = netdev->tx_queue_len;
486 }
487
488 int e1000_up(struct e1000_adapter *adapter)
489 {
490 struct e1000_hw *hw = &adapter->hw;
491
492 /* hardware has been reset, we need to reload some things */
493 e1000_configure(adapter);
494
495 clear_bit(__E1000_DOWN, &adapter->flags);
496
497 napi_enable(&adapter->napi);
498
499 e1000_irq_enable(adapter);
500
501 /* fire a link change interrupt to start the watchdog */
502 ew32(ICS, E1000_ICS_LSC);
503 return 0;
504 }
505
506 /**
507 * e1000_power_up_phy - restore link in case the phy was powered down
508 * @adapter: address of board private structure
509 *
510 * The phy may be powered down to save power and turn off link when the
511 * driver is unloaded and wake on lan is not enabled (among others)
512 * *** this routine MUST be followed by a call to e1000_reset ***
513 *
514 **/
515
516 void e1000_power_up_phy(struct e1000_adapter *adapter)
517 {
518 struct e1000_hw *hw = &adapter->hw;
519 u16 mii_reg = 0;
520
521 /* Just clear the power down bit to wake the phy back up */
522 if (hw->media_type == e1000_media_type_copper) {
523 /* according to the manual, the phy will retain its
524 * settings across a power-down/up cycle */
525 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
526 mii_reg &= ~MII_CR_POWER_DOWN;
527 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
528 }
529 }
530
531 static void e1000_power_down_phy(struct e1000_adapter *adapter)
532 {
533 struct e1000_hw *hw = &adapter->hw;
534
535 /* Power down the PHY so no link is implied when interface is down *
536 * The PHY cannot be powered down if any of the following is true *
537 * (a) WoL is enabled
538 * (b) AMT is active
539 * (c) SoL/IDER session is active */
540 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
541 hw->media_type == e1000_media_type_copper) {
542 u16 mii_reg = 0;
543
544 switch (hw->mac_type) {
545 case e1000_82540:
546 case e1000_82545:
547 case e1000_82545_rev_3:
548 case e1000_82546:
549 case e1000_82546_rev_3:
550 case e1000_82541:
551 case e1000_82541_rev_2:
552 case e1000_82547:
553 case e1000_82547_rev_2:
554 if (er32(MANC) & E1000_MANC_SMBUS_EN)
555 goto out;
556 break;
557 case e1000_82571:
558 case e1000_82572:
559 case e1000_82573:
560 case e1000_80003es2lan:
561 case e1000_ich8lan:
562 if (e1000_check_mng_mode(hw) ||
563 e1000_check_phy_reset_block(hw))
564 goto out;
565 break;
566 default:
567 goto out;
568 }
569 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
570 mii_reg |= MII_CR_POWER_DOWN;
571 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
572 mdelay(1);
573 }
574 out:
575 return;
576 }
577
578 void e1000_down(struct e1000_adapter *adapter)
579 {
580 struct net_device *netdev = adapter->netdev;
581
582 /* signal that we're down so the interrupt handler does not
583 * reschedule our watchdog timer */
584 set_bit(__E1000_DOWN, &adapter->flags);
585
586 napi_disable(&adapter->napi);
587
588 e1000_irq_disable(adapter);
589
590 del_timer_sync(&adapter->tx_fifo_stall_timer);
591 del_timer_sync(&adapter->watchdog_timer);
592 del_timer_sync(&adapter->phy_info_timer);
593
594 netdev->tx_queue_len = adapter->tx_queue_len;
595 adapter->link_speed = 0;
596 adapter->link_duplex = 0;
597 netif_carrier_off(netdev);
598 netif_stop_queue(netdev);
599
600 e1000_reset(adapter);
601 e1000_clean_all_tx_rings(adapter);
602 e1000_clean_all_rx_rings(adapter);
603 }
604
605 void e1000_reinit_locked(struct e1000_adapter *adapter)
606 {
607 WARN_ON(in_interrupt());
608 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
609 msleep(1);
610 e1000_down(adapter);
611 e1000_up(adapter);
612 clear_bit(__E1000_RESETTING, &adapter->flags);
613 }
614
615 void e1000_reset(struct e1000_adapter *adapter)
616 {
617 struct e1000_hw *hw = &adapter->hw;
618 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
619 u16 fc_high_water_mark = E1000_FC_HIGH_DIFF;
620 bool legacy_pba_adjust = false;
621
622 /* Repartition Pba for greater than 9k mtu
623 * To take effect CTRL.RST is required.
624 */
625
626 switch (hw->mac_type) {
627 case e1000_82542_rev2_0:
628 case e1000_82542_rev2_1:
629 case e1000_82543:
630 case e1000_82544:
631 case e1000_82540:
632 case e1000_82541:
633 case e1000_82541_rev_2:
634 legacy_pba_adjust = true;
635 pba = E1000_PBA_48K;
636 break;
637 case e1000_82545:
638 case e1000_82545_rev_3:
639 case e1000_82546:
640 case e1000_82546_rev_3:
641 pba = E1000_PBA_48K;
642 break;
643 case e1000_82547:
644 case e1000_82547_rev_2:
645 legacy_pba_adjust = true;
646 pba = E1000_PBA_30K;
647 break;
648 case e1000_82571:
649 case e1000_82572:
650 case e1000_80003es2lan:
651 pba = E1000_PBA_38K;
652 break;
653 case e1000_82573:
654 pba = E1000_PBA_20K;
655 break;
656 case e1000_ich8lan:
657 pba = E1000_PBA_8K;
658 case e1000_undefined:
659 case e1000_num_macs:
660 break;
661 }
662
663 if (legacy_pba_adjust) {
664 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
665 pba -= 8; /* allocate more FIFO for Tx */
666
667 if (hw->mac_type == e1000_82547) {
668 adapter->tx_fifo_head = 0;
669 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
670 adapter->tx_fifo_size =
671 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
672 atomic_set(&adapter->tx_fifo_stall, 0);
673 }
674 } else if (hw->max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
675 /* adjust PBA for jumbo frames */
676 ew32(PBA, pba);
677
678 /* To maintain wire speed transmits, the Tx FIFO should be
679 * large enough to accomodate two full transmit packets,
680 * rounded up to the next 1KB and expressed in KB. Likewise,
681 * the Rx FIFO should be large enough to accomodate at least
682 * one full receive packet and is similarly rounded up and
683 * expressed in KB. */
684 pba = er32(PBA);
685 /* upper 16 bits has Tx packet buffer allocation size in KB */
686 tx_space = pba >> 16;
687 /* lower 16 bits has Rx packet buffer allocation size in KB */
688 pba &= 0xffff;
689 /* don't include ethernet FCS because hardware appends/strips */
690 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
691 VLAN_TAG_SIZE;
692 min_tx_space = min_rx_space;
693 min_tx_space *= 2;
694 min_tx_space = ALIGN(min_tx_space, 1024);
695 min_tx_space >>= 10;
696 min_rx_space = ALIGN(min_rx_space, 1024);
697 min_rx_space >>= 10;
698
699 /* If current Tx allocation is less than the min Tx FIFO size,
700 * and the min Tx FIFO size is less than the current Rx FIFO
701 * allocation, take space away from current Rx allocation */
702 if (tx_space < min_tx_space &&
703 ((min_tx_space - tx_space) < pba)) {
704 pba = pba - (min_tx_space - tx_space);
705
706 /* PCI/PCIx hardware has PBA alignment constraints */
707 switch (hw->mac_type) {
708 case e1000_82545 ... e1000_82546_rev_3:
709 pba &= ~(E1000_PBA_8K - 1);
710 break;
711 default:
712 break;
713 }
714
715 /* if short on rx space, rx wins and must trump tx
716 * adjustment or use Early Receive if available */
717 if (pba < min_rx_space) {
718 switch (hw->mac_type) {
719 case e1000_82573:
720 /* ERT enabled in e1000_configure_rx */
721 break;
722 default:
723 pba = min_rx_space;
724 break;
725 }
726 }
727 }
728 }
729
730 ew32(PBA, pba);
731
732 /* flow control settings */
733 /* Set the FC high water mark to 90% of the FIFO size.
734 * Required to clear last 3 LSB */
735 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
736 /* We can't use 90% on small FIFOs because the remainder
737 * would be less than 1 full frame. In this case, we size
738 * it to allow at least a full frame above the high water
739 * mark. */
740 if (pba < E1000_PBA_16K)
741 fc_high_water_mark = (pba * 1024) - 1600;
742
743 hw->fc_high_water = fc_high_water_mark;
744 hw->fc_low_water = fc_high_water_mark - 8;
745 if (hw->mac_type == e1000_80003es2lan)
746 hw->fc_pause_time = 0xFFFF;
747 else
748 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
749 hw->fc_send_xon = 1;
750 hw->fc = hw->original_fc;
751
752 /* Allow time for pending master requests to run */
753 e1000_reset_hw(hw);
754 if (hw->mac_type >= e1000_82544)
755 ew32(WUC, 0);
756
757 if (e1000_init_hw(hw))
758 DPRINTK(PROBE, ERR, "Hardware Error\n");
759 e1000_update_mng_vlan(adapter);
760
761 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
762 if (hw->mac_type >= e1000_82544 &&
763 hw->mac_type <= e1000_82547_rev_2 &&
764 hw->autoneg == 1 &&
765 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
766 u32 ctrl = er32(CTRL);
767 /* clear phy power management bit if we are in gig only mode,
768 * which if enabled will attempt negotiation to 100Mb, which
769 * can cause a loss of link at power off or driver unload */
770 ctrl &= ~E1000_CTRL_SWDPIN3;
771 ew32(CTRL, ctrl);
772 }
773
774 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
775 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
776
777 e1000_reset_adaptive(hw);
778 e1000_phy_get_info(hw, &adapter->phy_info);
779
780 if (!adapter->smart_power_down &&
781 (hw->mac_type == e1000_82571 ||
782 hw->mac_type == e1000_82572)) {
783 u16 phy_data = 0;
784 /* speed up time to link by disabling smart power down, ignore
785 * the return value of this function because there is nothing
786 * different we would do if it failed */
787 e1000_read_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT,
788 &phy_data);
789 phy_data &= ~IGP02E1000_PM_SPD;
790 e1000_write_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT,
791 phy_data);
792 }
793
794 e1000_release_manageability(adapter);
795 }
796
797 /**
798 * Dump the eeprom for users having checksum issues
799 **/
800 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
801 {
802 struct net_device *netdev = adapter->netdev;
803 struct ethtool_eeprom eeprom;
804 const struct ethtool_ops *ops = netdev->ethtool_ops;
805 u8 *data;
806 int i;
807 u16 csum_old, csum_new = 0;
808
809 eeprom.len = ops->get_eeprom_len(netdev);
810 eeprom.offset = 0;
811
812 data = kmalloc(eeprom.len, GFP_KERNEL);
813 if (!data) {
814 printk(KERN_ERR "Unable to allocate memory to dump EEPROM"
815 " data\n");
816 return;
817 }
818
819 ops->get_eeprom(netdev, &eeprom, data);
820
821 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
822 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
823 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
824 csum_new += data[i] + (data[i + 1] << 8);
825 csum_new = EEPROM_SUM - csum_new;
826
827 printk(KERN_ERR "/*********************/\n");
828 printk(KERN_ERR "Current EEPROM Checksum : 0x%04x\n", csum_old);
829 printk(KERN_ERR "Calculated : 0x%04x\n", csum_new);
830
831 printk(KERN_ERR "Offset Values\n");
832 printk(KERN_ERR "======== ======\n");
833 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
834
835 printk(KERN_ERR "Include this output when contacting your support "
836 "provider.\n");
837 printk(KERN_ERR "This is not a software error! Something bad "
838 "happened to your hardware or\n");
839 printk(KERN_ERR "EEPROM image. Ignoring this "
840 "problem could result in further problems,\n");
841 printk(KERN_ERR "possibly loss of data, corruption or system hangs!\n");
842 printk(KERN_ERR "The MAC Address will be reset to 00:00:00:00:00:00, "
843 "which is invalid\n");
844 printk(KERN_ERR "and requires you to set the proper MAC "
845 "address manually before continuing\n");
846 printk(KERN_ERR "to enable this network device.\n");
847 printk(KERN_ERR "Please inspect the EEPROM dump and report the issue "
848 "to your hardware vendor\n");
849 printk(KERN_ERR "or Intel Customer Support.\n");
850 printk(KERN_ERR "/*********************/\n");
851
852 kfree(data);
853 }
854
855 /**
856 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
857 * @pdev: PCI device information struct
858 *
859 * Return true if an adapter needs ioport resources
860 **/
861 static int e1000_is_need_ioport(struct pci_dev *pdev)
862 {
863 switch (pdev->device) {
864 case E1000_DEV_ID_82540EM:
865 case E1000_DEV_ID_82540EM_LOM:
866 case E1000_DEV_ID_82540EP:
867 case E1000_DEV_ID_82540EP_LOM:
868 case E1000_DEV_ID_82540EP_LP:
869 case E1000_DEV_ID_82541EI:
870 case E1000_DEV_ID_82541EI_MOBILE:
871 case E1000_DEV_ID_82541ER:
872 case E1000_DEV_ID_82541ER_LOM:
873 case E1000_DEV_ID_82541GI:
874 case E1000_DEV_ID_82541GI_LF:
875 case E1000_DEV_ID_82541GI_MOBILE:
876 case E1000_DEV_ID_82544EI_COPPER:
877 case E1000_DEV_ID_82544EI_FIBER:
878 case E1000_DEV_ID_82544GC_COPPER:
879 case E1000_DEV_ID_82544GC_LOM:
880 case E1000_DEV_ID_82545EM_COPPER:
881 case E1000_DEV_ID_82545EM_FIBER:
882 case E1000_DEV_ID_82546EB_COPPER:
883 case E1000_DEV_ID_82546EB_FIBER:
884 case E1000_DEV_ID_82546EB_QUAD_COPPER:
885 return true;
886 default:
887 return false;
888 }
889 }
890
891 static const struct net_device_ops e1000_netdev_ops = {
892 .ndo_open = e1000_open,
893 .ndo_stop = e1000_close,
894 .ndo_start_xmit = e1000_xmit_frame,
895 .ndo_get_stats = e1000_get_stats,
896 .ndo_set_rx_mode = e1000_set_rx_mode,
897 .ndo_set_mac_address = e1000_set_mac,
898 .ndo_tx_timeout = e1000_tx_timeout,
899 .ndo_change_mtu = e1000_change_mtu,
900 .ndo_do_ioctl = e1000_ioctl,
901 .ndo_validate_addr = eth_validate_addr,
902
903 .ndo_vlan_rx_register = e1000_vlan_rx_register,
904 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
905 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
906 #ifdef CONFIG_NET_POLL_CONTROLLER
907 .ndo_poll_controller = e1000_netpoll,
908 #endif
909 };
910
911 /**
912 * e1000_probe - Device Initialization Routine
913 * @pdev: PCI device information struct
914 * @ent: entry in e1000_pci_tbl
915 *
916 * Returns 0 on success, negative on failure
917 *
918 * e1000_probe initializes an adapter identified by a pci_dev structure.
919 * The OS initialization, configuring of the adapter private structure,
920 * and a hardware reset occur.
921 **/
922 static int __devinit e1000_probe(struct pci_dev *pdev,
923 const struct pci_device_id *ent)
924 {
925 struct net_device *netdev;
926 struct e1000_adapter *adapter;
927 struct e1000_hw *hw;
928
929 static int cards_found = 0;
930 static int global_quad_port_a = 0; /* global ksp3 port a indication */
931 int i, err, pci_using_dac;
932 u16 eeprom_data = 0;
933 u16 eeprom_apme_mask = E1000_EEPROM_APME;
934 int bars, need_ioport;
935
936 /* do not allocate ioport bars when not needed */
937 need_ioport = e1000_is_need_ioport(pdev);
938 if (need_ioport) {
939 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
940 err = pci_enable_device(pdev);
941 } else {
942 bars = pci_select_bars(pdev, IORESOURCE_MEM);
943 err = pci_enable_device(pdev);
944 }
945 if (err)
946 return err;
947
948 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
949 !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
950 pci_using_dac = 1;
951 } else {
952 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
953 if (err) {
954 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
955 if (err) {
956 E1000_ERR("No usable DMA configuration, "
957 "aborting\n");
958 goto err_dma;
959 }
960 }
961 pci_using_dac = 0;
962 }
963
964 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
965 if (err)
966 goto err_pci_reg;
967
968 pci_set_master(pdev);
969
970 err = -ENOMEM;
971 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
972 if (!netdev)
973 goto err_alloc_etherdev;
974
975 SET_NETDEV_DEV(netdev, &pdev->dev);
976
977 pci_set_drvdata(pdev, netdev);
978 adapter = netdev_priv(netdev);
979 adapter->netdev = netdev;
980 adapter->pdev = pdev;
981 adapter->msg_enable = (1 << debug) - 1;
982 adapter->bars = bars;
983 adapter->need_ioport = need_ioport;
984
985 hw = &adapter->hw;
986 hw->back = adapter;
987
988 err = -EIO;
989 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
990 if (!hw->hw_addr)
991 goto err_ioremap;
992
993 if (adapter->need_ioport) {
994 for (i = BAR_1; i <= BAR_5; i++) {
995 if (pci_resource_len(pdev, i) == 0)
996 continue;
997 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
998 hw->io_base = pci_resource_start(pdev, i);
999 break;
1000 }
1001 }
1002 }
1003
1004 netdev->netdev_ops = &e1000_netdev_ops;
1005 e1000_set_ethtool_ops(netdev);
1006 netdev->watchdog_timeo = 5 * HZ;
1007 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1008
1009 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1010
1011 adapter->bd_number = cards_found;
1012
1013 /* setup the private structure */
1014
1015 err = e1000_sw_init(adapter);
1016 if (err)
1017 goto err_sw_init;
1018
1019 err = -EIO;
1020 /* Flash BAR mapping must happen after e1000_sw_init
1021 * because it depends on mac_type */
1022 if ((hw->mac_type == e1000_ich8lan) &&
1023 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
1024 hw->flash_address = pci_ioremap_bar(pdev, 1);
1025 if (!hw->flash_address)
1026 goto err_flashmap;
1027 }
1028
1029 if (e1000_check_phy_reset_block(hw))
1030 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
1031
1032 if (hw->mac_type >= e1000_82543) {
1033 netdev->features = NETIF_F_SG |
1034 NETIF_F_HW_CSUM |
1035 NETIF_F_HW_VLAN_TX |
1036 NETIF_F_HW_VLAN_RX |
1037 NETIF_F_HW_VLAN_FILTER;
1038 if (hw->mac_type == e1000_ich8lan)
1039 netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1040 }
1041
1042 if ((hw->mac_type >= e1000_82544) &&
1043 (hw->mac_type != e1000_82547))
1044 netdev->features |= NETIF_F_TSO;
1045
1046 if (hw->mac_type > e1000_82547_rev_2)
1047 netdev->features |= NETIF_F_TSO6;
1048 if (pci_using_dac)
1049 netdev->features |= NETIF_F_HIGHDMA;
1050
1051 netdev->features |= NETIF_F_LLTX;
1052
1053 netdev->vlan_features |= NETIF_F_TSO;
1054 netdev->vlan_features |= NETIF_F_TSO6;
1055 netdev->vlan_features |= NETIF_F_HW_CSUM;
1056 netdev->vlan_features |= NETIF_F_SG;
1057
1058 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1059
1060 /* initialize eeprom parameters */
1061 if (e1000_init_eeprom_params(hw)) {
1062 E1000_ERR("EEPROM initialization failed\n");
1063 goto err_eeprom;
1064 }
1065
1066 /* before reading the EEPROM, reset the controller to
1067 * put the device in a known good starting state */
1068
1069 e1000_reset_hw(hw);
1070
1071 /* make sure the EEPROM is good */
1072 if (e1000_validate_eeprom_checksum(hw) < 0) {
1073 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1074 e1000_dump_eeprom(adapter);
1075 /*
1076 * set MAC address to all zeroes to invalidate and temporary
1077 * disable this device for the user. This blocks regular
1078 * traffic while still permitting ethtool ioctls from reaching
1079 * the hardware as well as allowing the user to run the
1080 * interface after manually setting a hw addr using
1081 * `ip set address`
1082 */
1083 memset(hw->mac_addr, 0, netdev->addr_len);
1084 } else {
1085 /* copy the MAC address out of the EEPROM */
1086 if (e1000_read_mac_addr(hw))
1087 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1088 }
1089 /* don't block initalization here due to bad MAC address */
1090 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1091 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1092
1093 if (!is_valid_ether_addr(netdev->perm_addr))
1094 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1095
1096 e1000_get_bus_info(hw);
1097
1098 init_timer(&adapter->tx_fifo_stall_timer);
1099 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1100 adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
1101
1102 init_timer(&adapter->watchdog_timer);
1103 adapter->watchdog_timer.function = &e1000_watchdog;
1104 adapter->watchdog_timer.data = (unsigned long) adapter;
1105
1106 init_timer(&adapter->phy_info_timer);
1107 adapter->phy_info_timer.function = &e1000_update_phy_info;
1108 adapter->phy_info_timer.data = (unsigned long)adapter;
1109
1110 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1111
1112 e1000_check_options(adapter);
1113
1114 /* Initial Wake on LAN setting
1115 * If APM wake is enabled in the EEPROM,
1116 * enable the ACPI Magic Packet filter
1117 */
1118
1119 switch (hw->mac_type) {
1120 case e1000_82542_rev2_0:
1121 case e1000_82542_rev2_1:
1122 case e1000_82543:
1123 break;
1124 case e1000_82544:
1125 e1000_read_eeprom(hw,
1126 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1127 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1128 break;
1129 case e1000_ich8lan:
1130 e1000_read_eeprom(hw,
1131 EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1132 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1133 break;
1134 case e1000_82546:
1135 case e1000_82546_rev_3:
1136 case e1000_82571:
1137 case e1000_80003es2lan:
1138 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1139 e1000_read_eeprom(hw,
1140 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1141 break;
1142 }
1143 /* Fall Through */
1144 default:
1145 e1000_read_eeprom(hw,
1146 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1147 break;
1148 }
1149 if (eeprom_data & eeprom_apme_mask)
1150 adapter->eeprom_wol |= E1000_WUFC_MAG;
1151
1152 /* now that we have the eeprom settings, apply the special cases
1153 * where the eeprom may be wrong or the board simply won't support
1154 * wake on lan on a particular port */
1155 switch (pdev->device) {
1156 case E1000_DEV_ID_82546GB_PCIE:
1157 adapter->eeprom_wol = 0;
1158 break;
1159 case E1000_DEV_ID_82546EB_FIBER:
1160 case E1000_DEV_ID_82546GB_FIBER:
1161 case E1000_DEV_ID_82571EB_FIBER:
1162 /* Wake events only supported on port A for dual fiber
1163 * regardless of eeprom setting */
1164 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1165 adapter->eeprom_wol = 0;
1166 break;
1167 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1168 case E1000_DEV_ID_82571EB_QUAD_COPPER:
1169 case E1000_DEV_ID_82571EB_QUAD_FIBER:
1170 case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1171 case E1000_DEV_ID_82571PT_QUAD_COPPER:
1172 /* if quad port adapter, disable WoL on all but port A */
1173 if (global_quad_port_a != 0)
1174 adapter->eeprom_wol = 0;
1175 else
1176 adapter->quad_port_a = 1;
1177 /* Reset for multiple quad port adapters */
1178 if (++global_quad_port_a == 4)
1179 global_quad_port_a = 0;
1180 break;
1181 }
1182
1183 /* initialize the wol settings based on the eeprom settings */
1184 adapter->wol = adapter->eeprom_wol;
1185 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1186
1187 /* print bus type/speed/width info */
1188 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1189 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1190 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1191 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1192 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1193 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1194 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1195 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1196 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1197 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1198 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1199 "32-bit"));
1200
1201 printk("%pM\n", netdev->dev_addr);
1202
1203 if (hw->bus_type == e1000_bus_type_pci_express) {
1204 DPRINTK(PROBE, WARNING, "This device (id %04x:%04x) will no "
1205 "longer be supported by this driver in the future.\n",
1206 pdev->vendor, pdev->device);
1207 DPRINTK(PROBE, WARNING, "please use the \"e1000e\" "
1208 "driver instead.\n");
1209 }
1210
1211 /* reset the hardware with the new settings */
1212 e1000_reset(adapter);
1213
1214 /* If the controller is 82573 and f/w is AMT, do not set
1215 * DRV_LOAD until the interface is up. For all other cases,
1216 * let the f/w know that the h/w is now under the control
1217 * of the driver. */
1218 if (hw->mac_type != e1000_82573 ||
1219 !e1000_check_mng_mode(hw))
1220 e1000_get_hw_control(adapter);
1221
1222 /* tell the stack to leave us alone until e1000_open() is called */
1223 netif_carrier_off(netdev);
1224 netif_stop_queue(netdev);
1225
1226 strcpy(netdev->name, "eth%d");
1227 err = register_netdev(netdev);
1228 if (err)
1229 goto err_register;
1230
1231 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1232
1233 cards_found++;
1234 return 0;
1235
1236 err_register:
1237 e1000_release_hw_control(adapter);
1238 err_eeprom:
1239 if (!e1000_check_phy_reset_block(hw))
1240 e1000_phy_hw_reset(hw);
1241
1242 if (hw->flash_address)
1243 iounmap(hw->flash_address);
1244 err_flashmap:
1245 for (i = 0; i < adapter->num_rx_queues; i++)
1246 dev_put(&adapter->polling_netdev[i]);
1247
1248 kfree(adapter->tx_ring);
1249 kfree(adapter->rx_ring);
1250 kfree(adapter->polling_netdev);
1251 err_sw_init:
1252 iounmap(hw->hw_addr);
1253 err_ioremap:
1254 free_netdev(netdev);
1255 err_alloc_etherdev:
1256 pci_release_selected_regions(pdev, bars);
1257 err_pci_reg:
1258 err_dma:
1259 pci_disable_device(pdev);
1260 return err;
1261 }
1262
1263 /**
1264 * e1000_remove - Device Removal Routine
1265 * @pdev: PCI device information struct
1266 *
1267 * e1000_remove is called by the PCI subsystem to alert the driver
1268 * that it should release a PCI device. The could be caused by a
1269 * Hot-Plug event, or because the driver is going to be removed from
1270 * memory.
1271 **/
1272
1273 static void __devexit e1000_remove(struct pci_dev *pdev)
1274 {
1275 struct net_device *netdev = pci_get_drvdata(pdev);
1276 struct e1000_adapter *adapter = netdev_priv(netdev);
1277 struct e1000_hw *hw = &adapter->hw;
1278 int i;
1279
1280 cancel_work_sync(&adapter->reset_task);
1281
1282 e1000_release_manageability(adapter);
1283
1284 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1285 * would have already happened in close and is redundant. */
1286 e1000_release_hw_control(adapter);
1287
1288 for (i = 0; i < adapter->num_rx_queues; i++)
1289 dev_put(&adapter->polling_netdev[i]);
1290
1291 unregister_netdev(netdev);
1292
1293 if (!e1000_check_phy_reset_block(hw))
1294 e1000_phy_hw_reset(hw);
1295
1296 kfree(adapter->tx_ring);
1297 kfree(adapter->rx_ring);
1298 kfree(adapter->polling_netdev);
1299
1300 iounmap(hw->hw_addr);
1301 if (hw->flash_address)
1302 iounmap(hw->flash_address);
1303 pci_release_selected_regions(pdev, adapter->bars);
1304
1305 free_netdev(netdev);
1306
1307 pci_disable_device(pdev);
1308 }
1309
1310 /**
1311 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1312 * @adapter: board private structure to initialize
1313 *
1314 * e1000_sw_init initializes the Adapter private data structure.
1315 * Fields are initialized based on PCI device information and
1316 * OS network device settings (MTU size).
1317 **/
1318
1319 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1320 {
1321 struct e1000_hw *hw = &adapter->hw;
1322 struct net_device *netdev = adapter->netdev;
1323 struct pci_dev *pdev = adapter->pdev;
1324 int i;
1325
1326 /* PCI config space info */
1327
1328 hw->vendor_id = pdev->vendor;
1329 hw->device_id = pdev->device;
1330 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1331 hw->subsystem_id = pdev->subsystem_device;
1332 hw->revision_id = pdev->revision;
1333
1334 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1335
1336 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1337 hw->max_frame_size = netdev->mtu +
1338 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1339 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1340
1341 /* identify the MAC */
1342
1343 if (e1000_set_mac_type(hw)) {
1344 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1345 return -EIO;
1346 }
1347
1348 switch (hw->mac_type) {
1349 default:
1350 break;
1351 case e1000_82541:
1352 case e1000_82547:
1353 case e1000_82541_rev_2:
1354 case e1000_82547_rev_2:
1355 hw->phy_init_script = 1;
1356 break;
1357 }
1358
1359 e1000_set_media_type(hw);
1360
1361 hw->wait_autoneg_complete = false;
1362 hw->tbi_compatibility_en = true;
1363 hw->adaptive_ifs = true;
1364
1365 /* Copper options */
1366
1367 if (hw->media_type == e1000_media_type_copper) {
1368 hw->mdix = AUTO_ALL_MODES;
1369 hw->disable_polarity_correction = false;
1370 hw->master_slave = E1000_MASTER_SLAVE;
1371 }
1372
1373 adapter->num_tx_queues = 1;
1374 adapter->num_rx_queues = 1;
1375
1376 if (e1000_alloc_queues(adapter)) {
1377 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1378 return -ENOMEM;
1379 }
1380
1381 for (i = 0; i < adapter->num_rx_queues; i++) {
1382 adapter->polling_netdev[i].priv = adapter;
1383 dev_hold(&adapter->polling_netdev[i]);
1384 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1385 }
1386 spin_lock_init(&adapter->tx_queue_lock);
1387
1388 /* Explicitly disable IRQ since the NIC can be in any state. */
1389 e1000_irq_disable(adapter);
1390
1391 spin_lock_init(&adapter->stats_lock);
1392
1393 set_bit(__E1000_DOWN, &adapter->flags);
1394
1395 return 0;
1396 }
1397
1398 /**
1399 * e1000_alloc_queues - Allocate memory for all rings
1400 * @adapter: board private structure to initialize
1401 *
1402 * We allocate one ring per queue at run-time since we don't know the
1403 * number of queues at compile-time. The polling_netdev array is
1404 * intended for Multiqueue, but should work fine with a single queue.
1405 **/
1406
1407 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1408 {
1409 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1410 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1411 if (!adapter->tx_ring)
1412 return -ENOMEM;
1413
1414 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1415 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1416 if (!adapter->rx_ring) {
1417 kfree(adapter->tx_ring);
1418 return -ENOMEM;
1419 }
1420
1421 adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1422 sizeof(struct net_device),
1423 GFP_KERNEL);
1424 if (!adapter->polling_netdev) {
1425 kfree(adapter->tx_ring);
1426 kfree(adapter->rx_ring);
1427 return -ENOMEM;
1428 }
1429
1430 return E1000_SUCCESS;
1431 }
1432
1433 /**
1434 * e1000_open - Called when a network interface is made active
1435 * @netdev: network interface device structure
1436 *
1437 * Returns 0 on success, negative value on failure
1438 *
1439 * The open entry point is called when a network interface is made
1440 * active by the system (IFF_UP). At this point all resources needed
1441 * for transmit and receive operations are allocated, the interrupt
1442 * handler is registered with the OS, the watchdog timer is started,
1443 * and the stack is notified that the interface is ready.
1444 **/
1445
1446 static int e1000_open(struct net_device *netdev)
1447 {
1448 struct e1000_adapter *adapter = netdev_priv(netdev);
1449 struct e1000_hw *hw = &adapter->hw;
1450 int err;
1451
1452 /* disallow open during test */
1453 if (test_bit(__E1000_TESTING, &adapter->flags))
1454 return -EBUSY;
1455
1456 /* allocate transmit descriptors */
1457 err = e1000_setup_all_tx_resources(adapter);
1458 if (err)
1459 goto err_setup_tx;
1460
1461 /* allocate receive descriptors */
1462 err = e1000_setup_all_rx_resources(adapter);
1463 if (err)
1464 goto err_setup_rx;
1465
1466 e1000_power_up_phy(adapter);
1467
1468 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1469 if ((hw->mng_cookie.status &
1470 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1471 e1000_update_mng_vlan(adapter);
1472 }
1473
1474 /* If AMT is enabled, let the firmware know that the network
1475 * interface is now open */
1476 if (hw->mac_type == e1000_82573 &&
1477 e1000_check_mng_mode(hw))
1478 e1000_get_hw_control(adapter);
1479
1480 /* before we allocate an interrupt, we must be ready to handle it.
1481 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1482 * as soon as we call pci_request_irq, so we have to setup our
1483 * clean_rx handler before we do so. */
1484 e1000_configure(adapter);
1485
1486 err = e1000_request_irq(adapter);
1487 if (err)
1488 goto err_req_irq;
1489
1490 /* From here on the code is the same as e1000_up() */
1491 clear_bit(__E1000_DOWN, &adapter->flags);
1492
1493 napi_enable(&adapter->napi);
1494
1495 e1000_irq_enable(adapter);
1496
1497 netif_start_queue(netdev);
1498
1499 /* fire a link status change interrupt to start the watchdog */
1500 ew32(ICS, E1000_ICS_LSC);
1501
1502 return E1000_SUCCESS;
1503
1504 err_req_irq:
1505 e1000_release_hw_control(adapter);
1506 e1000_power_down_phy(adapter);
1507 e1000_free_all_rx_resources(adapter);
1508 err_setup_rx:
1509 e1000_free_all_tx_resources(adapter);
1510 err_setup_tx:
1511 e1000_reset(adapter);
1512
1513 return err;
1514 }
1515
1516 /**
1517 * e1000_close - Disables a network interface
1518 * @netdev: network interface device structure
1519 *
1520 * Returns 0, this is not allowed to fail
1521 *
1522 * The close entry point is called when an interface is de-activated
1523 * by the OS. The hardware is still under the drivers control, but
1524 * needs to be disabled. A global MAC reset is issued to stop the
1525 * hardware, and all transmit and receive resources are freed.
1526 **/
1527
1528 static int e1000_close(struct net_device *netdev)
1529 {
1530 struct e1000_adapter *adapter = netdev_priv(netdev);
1531 struct e1000_hw *hw = &adapter->hw;
1532
1533 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1534 e1000_down(adapter);
1535 e1000_power_down_phy(adapter);
1536 e1000_free_irq(adapter);
1537
1538 e1000_free_all_tx_resources(adapter);
1539 e1000_free_all_rx_resources(adapter);
1540
1541 /* kill manageability vlan ID if supported, but not if a vlan with
1542 * the same ID is registered on the host OS (let 8021q kill it) */
1543 if ((hw->mng_cookie.status &
1544 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1545 !(adapter->vlgrp &&
1546 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1547 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1548 }
1549
1550 /* If AMT is enabled, let the firmware know that the network
1551 * interface is now closed */
1552 if (hw->mac_type == e1000_82573 &&
1553 e1000_check_mng_mode(hw))
1554 e1000_release_hw_control(adapter);
1555
1556 return 0;
1557 }
1558
1559 /**
1560 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1561 * @adapter: address of board private structure
1562 * @start: address of beginning of memory
1563 * @len: length of memory
1564 **/
1565 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1566 unsigned long len)
1567 {
1568 struct e1000_hw *hw = &adapter->hw;
1569 unsigned long begin = (unsigned long)start;
1570 unsigned long end = begin + len;
1571
1572 /* First rev 82545 and 82546 need to not allow any memory
1573 * write location to cross 64k boundary due to errata 23 */
1574 if (hw->mac_type == e1000_82545 ||
1575 hw->mac_type == e1000_82546) {
1576 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1577 }
1578
1579 return true;
1580 }
1581
1582 /**
1583 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1584 * @adapter: board private structure
1585 * @txdr: tx descriptor ring (for a specific queue) to setup
1586 *
1587 * Return 0 on success, negative on failure
1588 **/
1589
1590 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1591 struct e1000_tx_ring *txdr)
1592 {
1593 struct pci_dev *pdev = adapter->pdev;
1594 int size;
1595
1596 size = sizeof(struct e1000_buffer) * txdr->count;
1597 txdr->buffer_info = vmalloc(size);
1598 if (!txdr->buffer_info) {
1599 DPRINTK(PROBE, ERR,
1600 "Unable to allocate memory for the transmit descriptor ring\n");
1601 return -ENOMEM;
1602 }
1603 memset(txdr->buffer_info, 0, size);
1604
1605 /* round up to nearest 4K */
1606
1607 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1608 txdr->size = ALIGN(txdr->size, 4096);
1609
1610 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1611 if (!txdr->desc) {
1612 setup_tx_desc_die:
1613 vfree(txdr->buffer_info);
1614 DPRINTK(PROBE, ERR,
1615 "Unable to allocate memory for the transmit descriptor ring\n");
1616 return -ENOMEM;
1617 }
1618
1619 /* Fix for errata 23, can't cross 64kB boundary */
1620 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1621 void *olddesc = txdr->desc;
1622 dma_addr_t olddma = txdr->dma;
1623 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1624 "at %p\n", txdr->size, txdr->desc);
1625 /* Try again, without freeing the previous */
1626 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1627 /* Failed allocation, critical failure */
1628 if (!txdr->desc) {
1629 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1630 goto setup_tx_desc_die;
1631 }
1632
1633 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1634 /* give up */
1635 pci_free_consistent(pdev, txdr->size, txdr->desc,
1636 txdr->dma);
1637 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1638 DPRINTK(PROBE, ERR,
1639 "Unable to allocate aligned memory "
1640 "for the transmit descriptor ring\n");
1641 vfree(txdr->buffer_info);
1642 return -ENOMEM;
1643 } else {
1644 /* Free old allocation, new allocation was successful */
1645 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1646 }
1647 }
1648 memset(txdr->desc, 0, txdr->size);
1649
1650 txdr->next_to_use = 0;
1651 txdr->next_to_clean = 0;
1652 spin_lock_init(&txdr->tx_lock);
1653
1654 return 0;
1655 }
1656
1657 /**
1658 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1659 * (Descriptors) for all queues
1660 * @adapter: board private structure
1661 *
1662 * Return 0 on success, negative on failure
1663 **/
1664
1665 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1666 {
1667 int i, err = 0;
1668
1669 for (i = 0; i < adapter->num_tx_queues; i++) {
1670 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1671 if (err) {
1672 DPRINTK(PROBE, ERR,
1673 "Allocation for Tx Queue %u failed\n", i);
1674 for (i-- ; i >= 0; i--)
1675 e1000_free_tx_resources(adapter,
1676 &adapter->tx_ring[i]);
1677 break;
1678 }
1679 }
1680
1681 return err;
1682 }
1683
1684 /**
1685 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1686 * @adapter: board private structure
1687 *
1688 * Configure the Tx unit of the MAC after a reset.
1689 **/
1690
1691 static void e1000_configure_tx(struct e1000_adapter *adapter)
1692 {
1693 u64 tdba;
1694 struct e1000_hw *hw = &adapter->hw;
1695 u32 tdlen, tctl, tipg, tarc;
1696 u32 ipgr1, ipgr2;
1697
1698 /* Setup the HW Tx Head and Tail descriptor pointers */
1699
1700 switch (adapter->num_tx_queues) {
1701 case 1:
1702 default:
1703 tdba = adapter->tx_ring[0].dma;
1704 tdlen = adapter->tx_ring[0].count *
1705 sizeof(struct e1000_tx_desc);
1706 ew32(TDLEN, tdlen);
1707 ew32(TDBAH, (tdba >> 32));
1708 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1709 ew32(TDT, 0);
1710 ew32(TDH, 0);
1711 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1712 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1713 break;
1714 }
1715
1716 /* Set the default values for the Tx Inter Packet Gap timer */
1717 if (hw->mac_type <= e1000_82547_rev_2 &&
1718 (hw->media_type == e1000_media_type_fiber ||
1719 hw->media_type == e1000_media_type_internal_serdes))
1720 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1721 else
1722 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1723
1724 switch (hw->mac_type) {
1725 case e1000_82542_rev2_0:
1726 case e1000_82542_rev2_1:
1727 tipg = DEFAULT_82542_TIPG_IPGT;
1728 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1729 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1730 break;
1731 case e1000_80003es2lan:
1732 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1733 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1734 break;
1735 default:
1736 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1737 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1738 break;
1739 }
1740 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1741 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1742 ew32(TIPG, tipg);
1743
1744 /* Set the Tx Interrupt Delay register */
1745
1746 ew32(TIDV, adapter->tx_int_delay);
1747 if (hw->mac_type >= e1000_82540)
1748 ew32(TADV, adapter->tx_abs_int_delay);
1749
1750 /* Program the Transmit Control Register */
1751
1752 tctl = er32(TCTL);
1753 tctl &= ~E1000_TCTL_CT;
1754 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1755 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1756
1757 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1758 tarc = er32(TARC0);
1759 /* set the speed mode bit, we'll clear it if we're not at
1760 * gigabit link later */
1761 tarc |= (1 << 21);
1762 ew32(TARC0, tarc);
1763 } else if (hw->mac_type == e1000_80003es2lan) {
1764 tarc = er32(TARC0);
1765 tarc |= 1;
1766 ew32(TARC0, tarc);
1767 tarc = er32(TARC1);
1768 tarc |= 1;
1769 ew32(TARC1, tarc);
1770 }
1771
1772 e1000_config_collision_dist(hw);
1773
1774 /* Setup Transmit Descriptor Settings for eop descriptor */
1775 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1776
1777 /* only set IDE if we are delaying interrupts using the timers */
1778 if (adapter->tx_int_delay)
1779 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1780
1781 if (hw->mac_type < e1000_82543)
1782 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1783 else
1784 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1785
1786 /* Cache if we're 82544 running in PCI-X because we'll
1787 * need this to apply a workaround later in the send path. */
1788 if (hw->mac_type == e1000_82544 &&
1789 hw->bus_type == e1000_bus_type_pcix)
1790 adapter->pcix_82544 = 1;
1791
1792 ew32(TCTL, tctl);
1793
1794 }
1795
1796 /**
1797 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1798 * @adapter: board private structure
1799 * @rxdr: rx descriptor ring (for a specific queue) to setup
1800 *
1801 * Returns 0 on success, negative on failure
1802 **/
1803
1804 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1805 struct e1000_rx_ring *rxdr)
1806 {
1807 struct e1000_hw *hw = &adapter->hw;
1808 struct pci_dev *pdev = adapter->pdev;
1809 int size, desc_len;
1810
1811 size = sizeof(struct e1000_buffer) * rxdr->count;
1812 rxdr->buffer_info = vmalloc(size);
1813 if (!rxdr->buffer_info) {
1814 DPRINTK(PROBE, ERR,
1815 "Unable to allocate memory for the receive descriptor ring\n");
1816 return -ENOMEM;
1817 }
1818 memset(rxdr->buffer_info, 0, size);
1819
1820 if (hw->mac_type <= e1000_82547_rev_2)
1821 desc_len = sizeof(struct e1000_rx_desc);
1822 else
1823 desc_len = sizeof(union e1000_rx_desc_packet_split);
1824
1825 /* Round up to nearest 4K */
1826
1827 rxdr->size = rxdr->count * desc_len;
1828 rxdr->size = ALIGN(rxdr->size, 4096);
1829
1830 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1831
1832 if (!rxdr->desc) {
1833 DPRINTK(PROBE, ERR,
1834 "Unable to allocate memory for the receive descriptor ring\n");
1835 setup_rx_desc_die:
1836 vfree(rxdr->buffer_info);
1837 return -ENOMEM;
1838 }
1839
1840 /* Fix for errata 23, can't cross 64kB boundary */
1841 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1842 void *olddesc = rxdr->desc;
1843 dma_addr_t olddma = rxdr->dma;
1844 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1845 "at %p\n", rxdr->size, rxdr->desc);
1846 /* Try again, without freeing the previous */
1847 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1848 /* Failed allocation, critical failure */
1849 if (!rxdr->desc) {
1850 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1851 DPRINTK(PROBE, ERR,
1852 "Unable to allocate memory "
1853 "for the receive descriptor ring\n");
1854 goto setup_rx_desc_die;
1855 }
1856
1857 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1858 /* give up */
1859 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1860 rxdr->dma);
1861 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1862 DPRINTK(PROBE, ERR,
1863 "Unable to allocate aligned memory "
1864 "for the receive descriptor ring\n");
1865 goto setup_rx_desc_die;
1866 } else {
1867 /* Free old allocation, new allocation was successful */
1868 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1869 }
1870 }
1871 memset(rxdr->desc, 0, rxdr->size);
1872
1873 rxdr->next_to_clean = 0;
1874 rxdr->next_to_use = 0;
1875
1876 return 0;
1877 }
1878
1879 /**
1880 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1881 * (Descriptors) for all queues
1882 * @adapter: board private structure
1883 *
1884 * Return 0 on success, negative on failure
1885 **/
1886
1887 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1888 {
1889 int i, err = 0;
1890
1891 for (i = 0; i < adapter->num_rx_queues; i++) {
1892 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1893 if (err) {
1894 DPRINTK(PROBE, ERR,
1895 "Allocation for Rx Queue %u failed\n", i);
1896 for (i-- ; i >= 0; i--)
1897 e1000_free_rx_resources(adapter,
1898 &adapter->rx_ring[i]);
1899 break;
1900 }
1901 }
1902
1903 return err;
1904 }
1905
1906 /**
1907 * e1000_setup_rctl - configure the receive control registers
1908 * @adapter: Board private structure
1909 **/
1910 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1911 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1912 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1913 {
1914 struct e1000_hw *hw = &adapter->hw;
1915 u32 rctl;
1916
1917 rctl = er32(RCTL);
1918
1919 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1920
1921 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1922 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1923 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1924
1925 if (hw->tbi_compatibility_on == 1)
1926 rctl |= E1000_RCTL_SBP;
1927 else
1928 rctl &= ~E1000_RCTL_SBP;
1929
1930 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1931 rctl &= ~E1000_RCTL_LPE;
1932 else
1933 rctl |= E1000_RCTL_LPE;
1934
1935 /* Setup buffer sizes */
1936 rctl &= ~E1000_RCTL_SZ_4096;
1937 rctl |= E1000_RCTL_BSEX;
1938 switch (adapter->rx_buffer_len) {
1939 case E1000_RXBUFFER_256:
1940 rctl |= E1000_RCTL_SZ_256;
1941 rctl &= ~E1000_RCTL_BSEX;
1942 break;
1943 case E1000_RXBUFFER_512:
1944 rctl |= E1000_RCTL_SZ_512;
1945 rctl &= ~E1000_RCTL_BSEX;
1946 break;
1947 case E1000_RXBUFFER_1024:
1948 rctl |= E1000_RCTL_SZ_1024;
1949 rctl &= ~E1000_RCTL_BSEX;
1950 break;
1951 case E1000_RXBUFFER_2048:
1952 default:
1953 rctl |= E1000_RCTL_SZ_2048;
1954 rctl &= ~E1000_RCTL_BSEX;
1955 break;
1956 case E1000_RXBUFFER_4096:
1957 rctl |= E1000_RCTL_SZ_4096;
1958 break;
1959 case E1000_RXBUFFER_8192:
1960 rctl |= E1000_RCTL_SZ_8192;
1961 break;
1962 case E1000_RXBUFFER_16384:
1963 rctl |= E1000_RCTL_SZ_16384;
1964 break;
1965 }
1966
1967 ew32(RCTL, rctl);
1968 }
1969
1970 /**
1971 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1972 * @adapter: board private structure
1973 *
1974 * Configure the Rx unit of the MAC after a reset.
1975 **/
1976
1977 static void e1000_configure_rx(struct e1000_adapter *adapter)
1978 {
1979 u64 rdba;
1980 struct e1000_hw *hw = &adapter->hw;
1981 u32 rdlen, rctl, rxcsum, ctrl_ext;
1982
1983 rdlen = adapter->rx_ring[0].count *
1984 sizeof(struct e1000_rx_desc);
1985 adapter->clean_rx = e1000_clean_rx_irq;
1986 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1987
1988 /* disable receives while setting up the descriptors */
1989 rctl = er32(RCTL);
1990 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1991
1992 /* set the Receive Delay Timer Register */
1993 ew32(RDTR, adapter->rx_int_delay);
1994
1995 if (hw->mac_type >= e1000_82540) {
1996 ew32(RADV, adapter->rx_abs_int_delay);
1997 if (adapter->itr_setting != 0)
1998 ew32(ITR, 1000000000 / (adapter->itr * 256));
1999 }
2000
2001 if (hw->mac_type >= e1000_82571) {
2002 ctrl_ext = er32(CTRL_EXT);
2003 /* Reset delay timers after every interrupt */
2004 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2005 /* Auto-Mask interrupts upon ICR access */
2006 ctrl_ext |= E1000_CTRL_EXT_IAME;
2007 ew32(IAM, 0xffffffff);
2008 ew32(CTRL_EXT, ctrl_ext);
2009 E1000_WRITE_FLUSH();
2010 }
2011
2012 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2013 * the Base and Length of the Rx Descriptor Ring */
2014 switch (adapter->num_rx_queues) {
2015 case 1:
2016 default:
2017 rdba = adapter->rx_ring[0].dma;
2018 ew32(RDLEN, rdlen);
2019 ew32(RDBAH, (rdba >> 32));
2020 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
2021 ew32(RDT, 0);
2022 ew32(RDH, 0);
2023 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2024 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2025 break;
2026 }
2027
2028 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2029 if (hw->mac_type >= e1000_82543) {
2030 rxcsum = er32(RXCSUM);
2031 if (adapter->rx_csum)
2032 rxcsum |= E1000_RXCSUM_TUOFL;
2033 else
2034 /* don't need to clear IPPCSE as it defaults to 0 */
2035 rxcsum &= ~E1000_RXCSUM_TUOFL;
2036 ew32(RXCSUM, rxcsum);
2037 }
2038
2039 /* Enable Receives */
2040 ew32(RCTL, rctl);
2041 }
2042
2043 /**
2044 * e1000_free_tx_resources - Free Tx Resources per Queue
2045 * @adapter: board private structure
2046 * @tx_ring: Tx descriptor ring for a specific queue
2047 *
2048 * Free all transmit software resources
2049 **/
2050
2051 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
2052 struct e1000_tx_ring *tx_ring)
2053 {
2054 struct pci_dev *pdev = adapter->pdev;
2055
2056 e1000_clean_tx_ring(adapter, tx_ring);
2057
2058 vfree(tx_ring->buffer_info);
2059 tx_ring->buffer_info = NULL;
2060
2061 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2062
2063 tx_ring->desc = NULL;
2064 }
2065
2066 /**
2067 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2068 * @adapter: board private structure
2069 *
2070 * Free all transmit software resources
2071 **/
2072
2073 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2074 {
2075 int i;
2076
2077 for (i = 0; i < adapter->num_tx_queues; i++)
2078 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2079 }
2080
2081 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2082 struct e1000_buffer *buffer_info)
2083 {
2084 if (buffer_info->dma) {
2085 pci_unmap_page(adapter->pdev,
2086 buffer_info->dma,
2087 buffer_info->length,
2088 PCI_DMA_TODEVICE);
2089 buffer_info->dma = 0;
2090 }
2091 if (buffer_info->skb) {
2092 dev_kfree_skb_any(buffer_info->skb);
2093 buffer_info->skb = NULL;
2094 }
2095 /* buffer_info must be completely set up in the transmit path */
2096 }
2097
2098 /**
2099 * e1000_clean_tx_ring - Free Tx Buffers
2100 * @adapter: board private structure
2101 * @tx_ring: ring to be cleaned
2102 **/
2103
2104 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2105 struct e1000_tx_ring *tx_ring)
2106 {
2107 struct e1000_hw *hw = &adapter->hw;
2108 struct e1000_buffer *buffer_info;
2109 unsigned long size;
2110 unsigned int i;
2111
2112 /* Free all the Tx ring sk_buffs */
2113
2114 for (i = 0; i < tx_ring->count; i++) {
2115 buffer_info = &tx_ring->buffer_info[i];
2116 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2117 }
2118
2119 size = sizeof(struct e1000_buffer) * tx_ring->count;
2120 memset(tx_ring->buffer_info, 0, size);
2121
2122 /* Zero out the descriptor ring */
2123
2124 memset(tx_ring->desc, 0, tx_ring->size);
2125
2126 tx_ring->next_to_use = 0;
2127 tx_ring->next_to_clean = 0;
2128 tx_ring->last_tx_tso = 0;
2129
2130 writel(0, hw->hw_addr + tx_ring->tdh);
2131 writel(0, hw->hw_addr + tx_ring->tdt);
2132 }
2133
2134 /**
2135 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2136 * @adapter: board private structure
2137 **/
2138
2139 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2140 {
2141 int i;
2142
2143 for (i = 0; i < adapter->num_tx_queues; i++)
2144 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2145 }
2146
2147 /**
2148 * e1000_free_rx_resources - Free Rx Resources
2149 * @adapter: board private structure
2150 * @rx_ring: ring to clean the resources from
2151 *
2152 * Free all receive software resources
2153 **/
2154
2155 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2156 struct e1000_rx_ring *rx_ring)
2157 {
2158 struct pci_dev *pdev = adapter->pdev;
2159
2160 e1000_clean_rx_ring(adapter, rx_ring);
2161
2162 vfree(rx_ring->buffer_info);
2163 rx_ring->buffer_info = NULL;
2164
2165 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2166
2167 rx_ring->desc = NULL;
2168 }
2169
2170 /**
2171 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2172 * @adapter: board private structure
2173 *
2174 * Free all receive software resources
2175 **/
2176
2177 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2178 {
2179 int i;
2180
2181 for (i = 0; i < adapter->num_rx_queues; i++)
2182 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2183 }
2184
2185 /**
2186 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2187 * @adapter: board private structure
2188 * @rx_ring: ring to free buffers from
2189 **/
2190
2191 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2192 struct e1000_rx_ring *rx_ring)
2193 {
2194 struct e1000_hw *hw = &adapter->hw;
2195 struct e1000_buffer *buffer_info;
2196 struct pci_dev *pdev = adapter->pdev;
2197 unsigned long size;
2198 unsigned int i;
2199
2200 /* Free all the Rx ring sk_buffs */
2201 for (i = 0; i < rx_ring->count; i++) {
2202 buffer_info = &rx_ring->buffer_info[i];
2203 if (buffer_info->skb) {
2204 pci_unmap_single(pdev,
2205 buffer_info->dma,
2206 buffer_info->length,
2207 PCI_DMA_FROMDEVICE);
2208
2209 dev_kfree_skb(buffer_info->skb);
2210 buffer_info->skb = NULL;
2211 }
2212 }
2213
2214 size = sizeof(struct e1000_buffer) * rx_ring->count;
2215 memset(rx_ring->buffer_info, 0, size);
2216
2217 /* Zero out the descriptor ring */
2218
2219 memset(rx_ring->desc, 0, rx_ring->size);
2220
2221 rx_ring->next_to_clean = 0;
2222 rx_ring->next_to_use = 0;
2223
2224 writel(0, hw->hw_addr + rx_ring->rdh);
2225 writel(0, hw->hw_addr + rx_ring->rdt);
2226 }
2227
2228 /**
2229 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2230 * @adapter: board private structure
2231 **/
2232
2233 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2234 {
2235 int i;
2236
2237 for (i = 0; i < adapter->num_rx_queues; i++)
2238 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2239 }
2240
2241 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2242 * and memory write and invalidate disabled for certain operations
2243 */
2244 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2245 {
2246 struct e1000_hw *hw = &adapter->hw;
2247 struct net_device *netdev = adapter->netdev;
2248 u32 rctl;
2249
2250 e1000_pci_clear_mwi(hw);
2251
2252 rctl = er32(RCTL);
2253 rctl |= E1000_RCTL_RST;
2254 ew32(RCTL, rctl);
2255 E1000_WRITE_FLUSH();
2256 mdelay(5);
2257
2258 if (netif_running(netdev))
2259 e1000_clean_all_rx_rings(adapter);
2260 }
2261
2262 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2263 {
2264 struct e1000_hw *hw = &adapter->hw;
2265 struct net_device *netdev = adapter->netdev;
2266 u32 rctl;
2267
2268 rctl = er32(RCTL);
2269 rctl &= ~E1000_RCTL_RST;
2270 ew32(RCTL, rctl);
2271 E1000_WRITE_FLUSH();
2272 mdelay(5);
2273
2274 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2275 e1000_pci_set_mwi(hw);
2276
2277 if (netif_running(netdev)) {
2278 /* No need to loop, because 82542 supports only 1 queue */
2279 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2280 e1000_configure_rx(adapter);
2281 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2282 }
2283 }
2284
2285 /**
2286 * e1000_set_mac - Change the Ethernet Address of the NIC
2287 * @netdev: network interface device structure
2288 * @p: pointer to an address structure
2289 *
2290 * Returns 0 on success, negative on failure
2291 **/
2292
2293 static int e1000_set_mac(struct net_device *netdev, void *p)
2294 {
2295 struct e1000_adapter *adapter = netdev_priv(netdev);
2296 struct e1000_hw *hw = &adapter->hw;
2297 struct sockaddr *addr = p;
2298
2299 if (!is_valid_ether_addr(addr->sa_data))
2300 return -EADDRNOTAVAIL;
2301
2302 /* 82542 2.0 needs to be in reset to write receive address registers */
2303
2304 if (hw->mac_type == e1000_82542_rev2_0)
2305 e1000_enter_82542_rst(adapter);
2306
2307 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2308 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2309
2310 e1000_rar_set(hw, hw->mac_addr, 0);
2311
2312 /* With 82571 controllers, LAA may be overwritten (with the default)
2313 * due to controller reset from the other port. */
2314 if (hw->mac_type == e1000_82571) {
2315 /* activate the work around */
2316 hw->laa_is_present = 1;
2317
2318 /* Hold a copy of the LAA in RAR[14] This is done so that
2319 * between the time RAR[0] gets clobbered and the time it
2320 * gets fixed (in e1000_watchdog), the actual LAA is in one
2321 * of the RARs and no incoming packets directed to this port
2322 * are dropped. Eventaully the LAA will be in RAR[0] and
2323 * RAR[14] */
2324 e1000_rar_set(hw, hw->mac_addr,
2325 E1000_RAR_ENTRIES - 1);
2326 }
2327
2328 if (hw->mac_type == e1000_82542_rev2_0)
2329 e1000_leave_82542_rst(adapter);
2330
2331 return 0;
2332 }
2333
2334 /**
2335 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2336 * @netdev: network interface device structure
2337 *
2338 * The set_rx_mode entry point is called whenever the unicast or multicast
2339 * address lists or the network interface flags are updated. This routine is
2340 * responsible for configuring the hardware for proper unicast, multicast,
2341 * promiscuous mode, and all-multi behavior.
2342 **/
2343
2344 static void e1000_set_rx_mode(struct net_device *netdev)
2345 {
2346 struct e1000_adapter *adapter = netdev_priv(netdev);
2347 struct e1000_hw *hw = &adapter->hw;
2348 struct dev_addr_list *uc_ptr;
2349 struct dev_addr_list *mc_ptr;
2350 u32 rctl;
2351 u32 hash_value;
2352 int i, rar_entries = E1000_RAR_ENTRIES;
2353 int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2354 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2355 E1000_NUM_MTA_REGISTERS;
2356
2357 if (hw->mac_type == e1000_ich8lan)
2358 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2359
2360 /* reserve RAR[14] for LAA over-write work-around */
2361 if (hw->mac_type == e1000_82571)
2362 rar_entries--;
2363
2364 /* Check for Promiscuous and All Multicast modes */
2365
2366 rctl = er32(RCTL);
2367
2368 if (netdev->flags & IFF_PROMISC) {
2369 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2370 rctl &= ~E1000_RCTL_VFE;
2371 } else {
2372 if (netdev->flags & IFF_ALLMULTI) {
2373 rctl |= E1000_RCTL_MPE;
2374 } else {
2375 rctl &= ~E1000_RCTL_MPE;
2376 }
2377 if (adapter->hw.mac_type != e1000_ich8lan)
2378 rctl |= E1000_RCTL_VFE;
2379 }
2380
2381 uc_ptr = NULL;
2382 if (netdev->uc_count > rar_entries - 1) {
2383 rctl |= E1000_RCTL_UPE;
2384 } else if (!(netdev->flags & IFF_PROMISC)) {
2385 rctl &= ~E1000_RCTL_UPE;
2386 uc_ptr = netdev->uc_list;
2387 }
2388
2389 ew32(RCTL, rctl);
2390
2391 /* 82542 2.0 needs to be in reset to write receive address registers */
2392
2393 if (hw->mac_type == e1000_82542_rev2_0)
2394 e1000_enter_82542_rst(adapter);
2395
2396 /* load the first 14 addresses into the exact filters 1-14. Unicast
2397 * addresses take precedence to avoid disabling unicast filtering
2398 * when possible.
2399 *
2400 * RAR 0 is used for the station MAC adddress
2401 * if there are not 14 addresses, go ahead and clear the filters
2402 * -- with 82571 controllers only 0-13 entries are filled here
2403 */
2404 mc_ptr = netdev->mc_list;
2405
2406 for (i = 1; i < rar_entries; i++) {
2407 if (uc_ptr) {
2408 e1000_rar_set(hw, uc_ptr->da_addr, i);
2409 uc_ptr = uc_ptr->next;
2410 } else if (mc_ptr) {
2411 e1000_rar_set(hw, mc_ptr->da_addr, i);
2412 mc_ptr = mc_ptr->next;
2413 } else {
2414 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2415 E1000_WRITE_FLUSH();
2416 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2417 E1000_WRITE_FLUSH();
2418 }
2419 }
2420 WARN_ON(uc_ptr != NULL);
2421
2422 /* clear the old settings from the multicast hash table */
2423
2424 for (i = 0; i < mta_reg_count; i++) {
2425 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2426 E1000_WRITE_FLUSH();
2427 }
2428
2429 /* load any remaining addresses into the hash table */
2430
2431 for (; mc_ptr; mc_ptr = mc_ptr->next) {
2432 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2433 e1000_mta_set(hw, hash_value);
2434 }
2435
2436 if (hw->mac_type == e1000_82542_rev2_0)
2437 e1000_leave_82542_rst(adapter);
2438 }
2439
2440 /* Need to wait a few seconds after link up to get diagnostic information from
2441 * the phy */
2442
2443 static void e1000_update_phy_info(unsigned long data)
2444 {
2445 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2446 struct e1000_hw *hw = &adapter->hw;
2447 e1000_phy_get_info(hw, &adapter->phy_info);
2448 }
2449
2450 /**
2451 * e1000_82547_tx_fifo_stall - Timer Call-back
2452 * @data: pointer to adapter cast into an unsigned long
2453 **/
2454
2455 static void e1000_82547_tx_fifo_stall(unsigned long data)
2456 {
2457 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2458 struct e1000_hw *hw = &adapter->hw;
2459 struct net_device *netdev = adapter->netdev;
2460 u32 tctl;
2461
2462 if (atomic_read(&adapter->tx_fifo_stall)) {
2463 if ((er32(TDT) == er32(TDH)) &&
2464 (er32(TDFT) == er32(TDFH)) &&
2465 (er32(TDFTS) == er32(TDFHS))) {
2466 tctl = er32(TCTL);
2467 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2468 ew32(TDFT, adapter->tx_head_addr);
2469 ew32(TDFH, adapter->tx_head_addr);
2470 ew32(TDFTS, adapter->tx_head_addr);
2471 ew32(TDFHS, adapter->tx_head_addr);
2472 ew32(TCTL, tctl);
2473 E1000_WRITE_FLUSH();
2474
2475 adapter->tx_fifo_head = 0;
2476 atomic_set(&adapter->tx_fifo_stall, 0);
2477 netif_wake_queue(netdev);
2478 } else {
2479 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2480 }
2481 }
2482 }
2483
2484 /**
2485 * e1000_watchdog - Timer Call-back
2486 * @data: pointer to adapter cast into an unsigned long
2487 **/
2488 static void e1000_watchdog(unsigned long data)
2489 {
2490 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2491 struct e1000_hw *hw = &adapter->hw;
2492 struct net_device *netdev = adapter->netdev;
2493 struct e1000_tx_ring *txdr = adapter->tx_ring;
2494 u32 link, tctl;
2495 s32 ret_val;
2496
2497 ret_val = e1000_check_for_link(hw);
2498 if ((ret_val == E1000_ERR_PHY) &&
2499 (hw->phy_type == e1000_phy_igp_3) &&
2500 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2501 /* See e1000_kumeran_lock_loss_workaround() */
2502 DPRINTK(LINK, INFO,
2503 "Gigabit has been disabled, downgrading speed\n");
2504 }
2505
2506 if (hw->mac_type == e1000_82573) {
2507 e1000_enable_tx_pkt_filtering(hw);
2508 if (adapter->mng_vlan_id != hw->mng_cookie.vlan_id)
2509 e1000_update_mng_vlan(adapter);
2510 }
2511
2512 if ((hw->media_type == e1000_media_type_internal_serdes) &&
2513 !(er32(TXCW) & E1000_TXCW_ANE))
2514 link = !hw->serdes_link_down;
2515 else
2516 link = er32(STATUS) & E1000_STATUS_LU;
2517
2518 if (link) {
2519 if (!netif_carrier_ok(netdev)) {
2520 u32 ctrl;
2521 bool txb2b = true;
2522 e1000_get_speed_and_duplex(hw,
2523 &adapter->link_speed,
2524 &adapter->link_duplex);
2525
2526 ctrl = er32(CTRL);
2527 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2528 "Flow Control: %s\n",
2529 adapter->link_speed,
2530 adapter->link_duplex == FULL_DUPLEX ?
2531 "Full Duplex" : "Half Duplex",
2532 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2533 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2534 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2535 E1000_CTRL_TFCE) ? "TX" : "None" )));
2536
2537 /* tweak tx_queue_len according to speed/duplex
2538 * and adjust the timeout factor */
2539 netdev->tx_queue_len = adapter->tx_queue_len;
2540 adapter->tx_timeout_factor = 1;
2541 switch (adapter->link_speed) {
2542 case SPEED_10:
2543 txb2b = false;
2544 netdev->tx_queue_len = 10;
2545 adapter->tx_timeout_factor = 8;
2546 break;
2547 case SPEED_100:
2548 txb2b = false;
2549 netdev->tx_queue_len = 100;
2550 /* maybe add some timeout factor ? */
2551 break;
2552 }
2553
2554 if ((hw->mac_type == e1000_82571 ||
2555 hw->mac_type == e1000_82572) &&
2556 !txb2b) {
2557 u32 tarc0;
2558 tarc0 = er32(TARC0);
2559 tarc0 &= ~(1 << 21);
2560 ew32(TARC0, tarc0);
2561 }
2562
2563 /* disable TSO for pcie and 10/100 speeds, to avoid
2564 * some hardware issues */
2565 if (!adapter->tso_force &&
2566 hw->bus_type == e1000_bus_type_pci_express){
2567 switch (adapter->link_speed) {
2568 case SPEED_10:
2569 case SPEED_100:
2570 DPRINTK(PROBE,INFO,
2571 "10/100 speed: disabling TSO\n");
2572 netdev->features &= ~NETIF_F_TSO;
2573 netdev->features &= ~NETIF_F_TSO6;
2574 break;
2575 case SPEED_1000:
2576 netdev->features |= NETIF_F_TSO;
2577 netdev->features |= NETIF_F_TSO6;
2578 break;
2579 default:
2580 /* oops */
2581 break;
2582 }
2583 }
2584
2585 /* enable transmits in the hardware, need to do this
2586 * after setting TARC0 */
2587 tctl = er32(TCTL);
2588 tctl |= E1000_TCTL_EN;
2589 ew32(TCTL, tctl);
2590
2591 netif_carrier_on(netdev);
2592 netif_wake_queue(netdev);
2593 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2594 adapter->smartspeed = 0;
2595 } else {
2596 /* make sure the receive unit is started */
2597 if (hw->rx_needs_kicking) {
2598 u32 rctl = er32(RCTL);
2599 ew32(RCTL, rctl | E1000_RCTL_EN);
2600 }
2601 }
2602 } else {
2603 if (netif_carrier_ok(netdev)) {
2604 adapter->link_speed = 0;
2605 adapter->link_duplex = 0;
2606 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2607 netif_carrier_off(netdev);
2608 netif_stop_queue(netdev);
2609 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2610
2611 /* 80003ES2LAN workaround--
2612 * For packet buffer work-around on link down event;
2613 * disable receives in the ISR and
2614 * reset device here in the watchdog
2615 */
2616 if (hw->mac_type == e1000_80003es2lan)
2617 /* reset device */
2618 schedule_work(&adapter->reset_task);
2619 }
2620
2621 e1000_smartspeed(adapter);
2622 }
2623
2624 e1000_update_stats(adapter);
2625
2626 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2627 adapter->tpt_old = adapter->stats.tpt;
2628 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2629 adapter->colc_old = adapter->stats.colc;
2630
2631 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2632 adapter->gorcl_old = adapter->stats.gorcl;
2633 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2634 adapter->gotcl_old = adapter->stats.gotcl;
2635
2636 e1000_update_adaptive(hw);
2637
2638 if (!netif_carrier_ok(netdev)) {
2639 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2640 /* We've lost link, so the controller stops DMA,
2641 * but we've got queued Tx work that's never going
2642 * to get done, so reset controller to flush Tx.
2643 * (Do the reset outside of interrupt context). */
2644 adapter->tx_timeout_count++;
2645 schedule_work(&adapter->reset_task);
2646 }
2647 }
2648
2649 /* Cause software interrupt to ensure rx ring is cleaned */
2650 ew32(ICS, E1000_ICS_RXDMT0);
2651
2652 /* Force detection of hung controller every watchdog period */
2653 adapter->detect_tx_hung = true;
2654
2655 /* With 82571 controllers, LAA may be overwritten due to controller
2656 * reset from the other port. Set the appropriate LAA in RAR[0] */
2657 if (hw->mac_type == e1000_82571 && hw->laa_is_present)
2658 e1000_rar_set(hw, hw->mac_addr, 0);
2659
2660 /* Reset the timer */
2661 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2662 }
2663
2664 enum latency_range {
2665 lowest_latency = 0,
2666 low_latency = 1,
2667 bulk_latency = 2,
2668 latency_invalid = 255
2669 };
2670
2671 /**
2672 * e1000_update_itr - update the dynamic ITR value based on statistics
2673 * Stores a new ITR value based on packets and byte
2674 * counts during the last interrupt. The advantage of per interrupt
2675 * computation is faster updates and more accurate ITR for the current
2676 * traffic pattern. Constants in this function were computed
2677 * based on theoretical maximum wire speed and thresholds were set based
2678 * on testing data as well as attempting to minimize response time
2679 * while increasing bulk throughput.
2680 * this functionality is controlled by the InterruptThrottleRate module
2681 * parameter (see e1000_param.c)
2682 * @adapter: pointer to adapter
2683 * @itr_setting: current adapter->itr
2684 * @packets: the number of packets during this measurement interval
2685 * @bytes: the number of bytes during this measurement interval
2686 **/
2687 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2688 u16 itr_setting, int packets, int bytes)
2689 {
2690 unsigned int retval = itr_setting;
2691 struct e1000_hw *hw = &adapter->hw;
2692
2693 if (unlikely(hw->mac_type < e1000_82540))
2694 goto update_itr_done;
2695
2696 if (packets == 0)
2697 goto update_itr_done;
2698
2699 switch (itr_setting) {
2700 case lowest_latency:
2701 /* jumbo frames get bulk treatment*/
2702 if (bytes/packets > 8000)
2703 retval = bulk_latency;
2704 else if ((packets < 5) && (bytes > 512))
2705 retval = low_latency;
2706 break;
2707 case low_latency: /* 50 usec aka 20000 ints/s */
2708 if (bytes > 10000) {
2709 /* jumbo frames need bulk latency setting */
2710 if (bytes/packets > 8000)
2711 retval = bulk_latency;
2712 else if ((packets < 10) || ((bytes/packets) > 1200))
2713 retval = bulk_latency;
2714 else if ((packets > 35))
2715 retval = lowest_latency;
2716 } else if (bytes/packets > 2000)
2717 retval = bulk_latency;
2718 else if (packets <= 2 && bytes < 512)
2719 retval = lowest_latency;
2720 break;
2721 case bulk_latency: /* 250 usec aka 4000 ints/s */
2722 if (bytes > 25000) {
2723 if (packets > 35)
2724 retval = low_latency;
2725 } else if (bytes < 6000) {
2726 retval = low_latency;
2727 }
2728 break;
2729 }
2730
2731 update_itr_done:
2732 return retval;
2733 }
2734
2735 static void e1000_set_itr(struct e1000_adapter *adapter)
2736 {
2737 struct e1000_hw *hw = &adapter->hw;
2738 u16 current_itr;
2739 u32 new_itr = adapter->itr;
2740
2741 if (unlikely(hw->mac_type < e1000_82540))
2742 return;
2743
2744 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2745 if (unlikely(adapter->link_speed != SPEED_1000)) {
2746 current_itr = 0;
2747 new_itr = 4000;
2748 goto set_itr_now;
2749 }
2750
2751 adapter->tx_itr = e1000_update_itr(adapter,
2752 adapter->tx_itr,
2753 adapter->total_tx_packets,
2754 adapter->total_tx_bytes);
2755 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2756 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2757 adapter->tx_itr = low_latency;
2758
2759 adapter->rx_itr = e1000_update_itr(adapter,
2760 adapter->rx_itr,
2761 adapter->total_rx_packets,
2762 adapter->total_rx_bytes);
2763 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2764 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2765 adapter->rx_itr = low_latency;
2766
2767 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2768
2769 switch (current_itr) {
2770 /* counts and packets in update_itr are dependent on these numbers */
2771 case lowest_latency:
2772 new_itr = 70000;
2773 break;
2774 case low_latency:
2775 new_itr = 20000; /* aka hwitr = ~200 */
2776 break;
2777 case bulk_latency:
2778 new_itr = 4000;
2779 break;
2780 default:
2781 break;
2782 }
2783
2784 set_itr_now:
2785 if (new_itr != adapter->itr) {
2786 /* this attempts to bias the interrupt rate towards Bulk
2787 * by adding intermediate steps when interrupt rate is
2788 * increasing */
2789 new_itr = new_itr > adapter->itr ?
2790 min(adapter->itr + (new_itr >> 2), new_itr) :
2791 new_itr;
2792 adapter->itr = new_itr;
2793 ew32(ITR, 1000000000 / (new_itr * 256));
2794 }
2795
2796 return;
2797 }
2798
2799 #define E1000_TX_FLAGS_CSUM 0x00000001
2800 #define E1000_TX_FLAGS_VLAN 0x00000002
2801 #define E1000_TX_FLAGS_TSO 0x00000004
2802 #define E1000_TX_FLAGS_IPV4 0x00000008
2803 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2804 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2805
2806 static int e1000_tso(struct e1000_adapter *adapter,
2807 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2808 {
2809 struct e1000_context_desc *context_desc;
2810 struct e1000_buffer *buffer_info;
2811 unsigned int i;
2812 u32 cmd_length = 0;
2813 u16 ipcse = 0, tucse, mss;
2814 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2815 int err;
2816
2817 if (skb_is_gso(skb)) {
2818 if (skb_header_cloned(skb)) {
2819 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2820 if (err)
2821 return err;
2822 }
2823
2824 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2825 mss = skb_shinfo(skb)->gso_size;
2826 if (skb->protocol == htons(ETH_P_IP)) {
2827 struct iphdr *iph = ip_hdr(skb);
2828 iph->tot_len = 0;
2829 iph->check = 0;
2830 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2831 iph->daddr, 0,
2832 IPPROTO_TCP,
2833 0);
2834 cmd_length = E1000_TXD_CMD_IP;
2835 ipcse = skb_transport_offset(skb) - 1;
2836 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2837 ipv6_hdr(skb)->payload_len = 0;
2838 tcp_hdr(skb)->check =
2839 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2840 &ipv6_hdr(skb)->daddr,
2841 0, IPPROTO_TCP, 0);
2842 ipcse = 0;
2843 }
2844 ipcss = skb_network_offset(skb);
2845 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2846 tucss = skb_transport_offset(skb);
2847 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2848 tucse = 0;
2849
2850 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2851 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2852
2853 i = tx_ring->next_to_use;
2854 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2855 buffer_info = &tx_ring->buffer_info[i];
2856
2857 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2858 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2859 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2860 context_desc->upper_setup.tcp_fields.tucss = tucss;
2861 context_desc->upper_setup.tcp_fields.tucso = tucso;
2862 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2863 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2864 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2865 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2866
2867 buffer_info->time_stamp = jiffies;
2868 buffer_info->next_to_watch = i;
2869
2870 if (++i == tx_ring->count) i = 0;
2871 tx_ring->next_to_use = i;
2872
2873 return true;
2874 }
2875 return false;
2876 }
2877
2878 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2879 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2880 {
2881 struct e1000_context_desc *context_desc;
2882 struct e1000_buffer *buffer_info;
2883 unsigned int i;
2884 u8 css;
2885 u32 cmd_len = E1000_TXD_CMD_DEXT;
2886
2887 if (skb->ip_summed != CHECKSUM_PARTIAL)
2888 return false;
2889
2890 switch (skb->protocol) {
2891 case __constant_htons(ETH_P_IP):
2892 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2893 cmd_len |= E1000_TXD_CMD_TCP;
2894 break;
2895 case __constant_htons(ETH_P_IPV6):
2896 /* XXX not handling all IPV6 headers */
2897 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2898 cmd_len |= E1000_TXD_CMD_TCP;
2899 break;
2900 default:
2901 if (unlikely(net_ratelimit()))
2902 DPRINTK(DRV, WARNING,
2903 "checksum_partial proto=%x!\n", skb->protocol);
2904 break;
2905 }
2906
2907 css = skb_transport_offset(skb);
2908
2909 i = tx_ring->next_to_use;
2910 buffer_info = &tx_ring->buffer_info[i];
2911 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2912
2913 context_desc->lower_setup.ip_config = 0;
2914 context_desc->upper_setup.tcp_fields.tucss = css;
2915 context_desc->upper_setup.tcp_fields.tucso =
2916 css + skb->csum_offset;
2917 context_desc->upper_setup.tcp_fields.tucse = 0;
2918 context_desc->tcp_seg_setup.data = 0;
2919 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2920
2921 buffer_info->time_stamp = jiffies;
2922 buffer_info->next_to_watch = i;
2923
2924 if (unlikely(++i == tx_ring->count)) i = 0;
2925 tx_ring->next_to_use = i;
2926
2927 return true;
2928 }
2929
2930 #define E1000_MAX_TXD_PWR 12
2931 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2932
2933 static int e1000_tx_map(struct e1000_adapter *adapter,
2934 struct e1000_tx_ring *tx_ring,
2935 struct sk_buff *skb, unsigned int first,
2936 unsigned int max_per_txd, unsigned int nr_frags,
2937 unsigned int mss)
2938 {
2939 struct e1000_hw *hw = &adapter->hw;
2940 struct e1000_buffer *buffer_info;
2941 unsigned int len = skb->len;
2942 unsigned int offset = 0, size, count = 0, i;
2943 unsigned int f;
2944 len -= skb->data_len;
2945
2946 i = tx_ring->next_to_use;
2947
2948 while (len) {
2949 buffer_info = &tx_ring->buffer_info[i];
2950 size = min(len, max_per_txd);
2951 /* Workaround for Controller erratum --
2952 * descriptor for non-tso packet in a linear SKB that follows a
2953 * tso gets written back prematurely before the data is fully
2954 * DMA'd to the controller */
2955 if (!skb->data_len && tx_ring->last_tx_tso &&
2956 !skb_is_gso(skb)) {
2957 tx_ring->last_tx_tso = 0;
2958 size -= 4;
2959 }
2960
2961 /* Workaround for premature desc write-backs
2962 * in TSO mode. Append 4-byte sentinel desc */
2963 if (unlikely(mss && !nr_frags && size == len && size > 8))
2964 size -= 4;
2965 /* work-around for errata 10 and it applies
2966 * to all controllers in PCI-X mode
2967 * The fix is to make sure that the first descriptor of a
2968 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2969 */
2970 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2971 (size > 2015) && count == 0))
2972 size = 2015;
2973
2974 /* Workaround for potential 82544 hang in PCI-X. Avoid
2975 * terminating buffers within evenly-aligned dwords. */
2976 if (unlikely(adapter->pcix_82544 &&
2977 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2978 size > 4))
2979 size -= 4;
2980
2981 buffer_info->length = size;
2982 buffer_info->dma =
2983 pci_map_single(adapter->pdev,
2984 skb->data + offset,
2985 size,
2986 PCI_DMA_TODEVICE);
2987 buffer_info->time_stamp = jiffies;
2988 buffer_info->next_to_watch = i;
2989
2990 len -= size;
2991 offset += size;
2992 count++;
2993 if (unlikely(++i == tx_ring->count)) i = 0;
2994 }
2995
2996 for (f = 0; f < nr_frags; f++) {
2997 struct skb_frag_struct *frag;
2998
2999 frag = &skb_shinfo(skb)->frags[f];
3000 len = frag->size;
3001 offset = frag->page_offset;
3002
3003 while (len) {
3004 buffer_info = &tx_ring->buffer_info[i];
3005 size = min(len, max_per_txd);
3006 /* Workaround for premature desc write-backs
3007 * in TSO mode. Append 4-byte sentinel desc */
3008 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3009 size -= 4;
3010 /* Workaround for potential 82544 hang in PCI-X.
3011 * Avoid terminating buffers within evenly-aligned
3012 * dwords. */
3013 if (unlikely(adapter->pcix_82544 &&
3014 !((unsigned long)(frag->page+offset+size-1) & 4) &&
3015 size > 4))
3016 size -= 4;
3017
3018 buffer_info->length = size;
3019 buffer_info->dma =
3020 pci_map_page(adapter->pdev,
3021 frag->page,
3022 offset,
3023 size,
3024 PCI_DMA_TODEVICE);
3025 buffer_info->time_stamp = jiffies;
3026 buffer_info->next_to_watch = i;
3027
3028 len -= size;
3029 offset += size;
3030 count++;
3031 if (unlikely(++i == tx_ring->count)) i = 0;
3032 }
3033 }
3034
3035 i = (i == 0) ? tx_ring->count - 1 : i - 1;
3036 tx_ring->buffer_info[i].skb = skb;
3037 tx_ring->buffer_info[first].next_to_watch = i;
3038
3039 return count;
3040 }
3041
3042 static void e1000_tx_queue(struct e1000_adapter *adapter,
3043 struct e1000_tx_ring *tx_ring, int tx_flags,
3044 int count)
3045 {
3046 struct e1000_hw *hw = &adapter->hw;
3047 struct e1000_tx_desc *tx_desc = NULL;
3048 struct e1000_buffer *buffer_info;
3049 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3050 unsigned int i;
3051
3052 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3053 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3054 E1000_TXD_CMD_TSE;
3055 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3056
3057 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3058 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3059 }
3060
3061 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3062 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3063 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3064 }
3065
3066 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3067 txd_lower |= E1000_TXD_CMD_VLE;
3068 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3069 }
3070
3071 i = tx_ring->next_to_use;
3072
3073 while (count--) {
3074 buffer_info = &tx_ring->buffer_info[i];
3075 tx_desc = E1000_TX_DESC(*tx_ring, i);
3076 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3077 tx_desc->lower.data =
3078 cpu_to_le32(txd_lower | buffer_info->length);
3079 tx_desc->upper.data = cpu_to_le32(txd_upper);
3080 if (unlikely(++i == tx_ring->count)) i = 0;
3081 }
3082
3083 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3084
3085 /* Force memory writes to complete before letting h/w
3086 * know there are new descriptors to fetch. (Only
3087 * applicable for weak-ordered memory model archs,
3088 * such as IA-64). */
3089 wmb();
3090
3091 tx_ring->next_to_use = i;
3092 writel(i, hw->hw_addr + tx_ring->tdt);
3093 /* we need this if more than one processor can write to our tail
3094 * at a time, it syncronizes IO on IA64/Altix systems */
3095 mmiowb();
3096 }
3097
3098 /**
3099 * 82547 workaround to avoid controller hang in half-duplex environment.
3100 * The workaround is to avoid queuing a large packet that would span
3101 * the internal Tx FIFO ring boundary by notifying the stack to resend
3102 * the packet at a later time. This gives the Tx FIFO an opportunity to
3103 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3104 * to the beginning of the Tx FIFO.
3105 **/
3106
3107 #define E1000_FIFO_HDR 0x10
3108 #define E1000_82547_PAD_LEN 0x3E0
3109
3110 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3111 struct sk_buff *skb)
3112 {
3113 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3114 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3115
3116 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3117
3118 if (adapter->link_duplex != HALF_DUPLEX)
3119 goto no_fifo_stall_required;
3120
3121 if (atomic_read(&adapter->tx_fifo_stall))
3122 return 1;
3123
3124 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3125 atomic_set(&adapter->tx_fifo_stall, 1);
3126 return 1;
3127 }
3128
3129 no_fifo_stall_required:
3130 adapter->tx_fifo_head += skb_fifo_len;
3131 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3132 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3133 return 0;
3134 }
3135
3136 #define MINIMUM_DHCP_PACKET_SIZE 282
3137 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3138 struct sk_buff *skb)
3139 {
3140 struct e1000_hw *hw = &adapter->hw;
3141 u16 length, offset;
3142 if (vlan_tx_tag_present(skb)) {
3143 if (!((vlan_tx_tag_get(skb) == hw->mng_cookie.vlan_id) &&
3144 ( hw->mng_cookie.status &
3145 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3146 return 0;
3147 }
3148 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3149 struct ethhdr *eth = (struct ethhdr *)skb->data;
3150 if ((htons(ETH_P_IP) == eth->h_proto)) {
3151 const struct iphdr *ip =
3152 (struct iphdr *)((u8 *)skb->data+14);
3153 if (IPPROTO_UDP == ip->protocol) {
3154 struct udphdr *udp =
3155 (struct udphdr *)((u8 *)ip +
3156 (ip->ihl << 2));
3157 if (ntohs(udp->dest) == 67) {
3158 offset = (u8 *)udp + 8 - skb->data;
3159 length = skb->len - offset;
3160
3161 return e1000_mng_write_dhcp_info(hw,
3162 (u8 *)udp + 8,
3163 length);
3164 }
3165 }
3166 }
3167 }
3168 return 0;
3169 }
3170
3171 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3172 {
3173 struct e1000_adapter *adapter = netdev_priv(netdev);
3174 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3175
3176 netif_stop_queue(netdev);
3177 /* Herbert's original patch had:
3178 * smp_mb__after_netif_stop_queue();
3179 * but since that doesn't exist yet, just open code it. */
3180 smp_mb();
3181
3182 /* We need to check again in a case another CPU has just
3183 * made room available. */
3184 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3185 return -EBUSY;
3186
3187 /* A reprieve! */
3188 netif_start_queue(netdev);
3189 ++adapter->restart_queue;
3190 return 0;
3191 }
3192
3193 static int e1000_maybe_stop_tx(struct net_device *netdev,
3194 struct e1000_tx_ring *tx_ring, int size)
3195 {
3196 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3197 return 0;
3198 return __e1000_maybe_stop_tx(netdev, size);
3199 }
3200
3201 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3202 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3203 {
3204 struct e1000_adapter *adapter = netdev_priv(netdev);
3205 struct e1000_hw *hw = &adapter->hw;
3206 struct e1000_tx_ring *tx_ring;
3207 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3208 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3209 unsigned int tx_flags = 0;
3210 unsigned int len = skb->len - skb->data_len;
3211 unsigned long flags;
3212 unsigned int nr_frags;
3213 unsigned int mss;
3214 int count = 0;
3215 int tso;
3216 unsigned int f;
3217
3218 /* This goes back to the question of how to logically map a tx queue
3219 * to a flow. Right now, performance is impacted slightly negatively
3220 * if using multiple tx queues. If the stack breaks away from a
3221 * single qdisc implementation, we can look at this again. */
3222 tx_ring = adapter->tx_ring;
3223
3224 if (unlikely(skb->len <= 0)) {
3225 dev_kfree_skb_any(skb);
3226 return NETDEV_TX_OK;
3227 }
3228
3229 /* 82571 and newer doesn't need the workaround that limited descriptor
3230 * length to 4kB */
3231 if (hw->mac_type >= e1000_82571)
3232 max_per_txd = 8192;
3233
3234 mss = skb_shinfo(skb)->gso_size;
3235 /* The controller does a simple calculation to
3236 * make sure there is enough room in the FIFO before
3237 * initiating the DMA for each buffer. The calc is:
3238 * 4 = ceil(buffer len/mss). To make sure we don't
3239 * overrun the FIFO, adjust the max buffer len if mss
3240 * drops. */
3241 if (mss) {
3242 u8 hdr_len;
3243 max_per_txd = min(mss << 2, max_per_txd);
3244 max_txd_pwr = fls(max_per_txd) - 1;
3245
3246 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3247 * points to just header, pull a few bytes of payload from
3248 * frags into skb->data */
3249 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3250 if (skb->data_len && hdr_len == len) {
3251 switch (hw->mac_type) {
3252 unsigned int pull_size;
3253 case e1000_82544:
3254 /* Make sure we have room to chop off 4 bytes,
3255 * and that the end alignment will work out to
3256 * this hardware's requirements
3257 * NOTE: this is a TSO only workaround
3258 * if end byte alignment not correct move us
3259 * into the next dword */
3260 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3261 break;
3262 /* fall through */
3263 case e1000_82571:
3264 case e1000_82572:
3265 case e1000_82573:
3266 case e1000_ich8lan:
3267 pull_size = min((unsigned int)4, skb->data_len);
3268 if (!__pskb_pull_tail(skb, pull_size)) {
3269 DPRINTK(DRV, ERR,
3270 "__pskb_pull_tail failed.\n");
3271 dev_kfree_skb_any(skb);
3272 return NETDEV_TX_OK;
3273 }
3274 len = skb->len - skb->data_len;
3275 break;
3276 default:
3277 /* do nothing */
3278 break;
3279 }
3280 }
3281 }
3282
3283 /* reserve a descriptor for the offload context */
3284 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3285 count++;
3286 count++;
3287
3288 /* Controller Erratum workaround */
3289 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3290 count++;
3291
3292 count += TXD_USE_COUNT(len, max_txd_pwr);
3293
3294 if (adapter->pcix_82544)
3295 count++;
3296
3297 /* work-around for errata 10 and it applies to all controllers
3298 * in PCI-X mode, so add one more descriptor to the count
3299 */
3300 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3301 (len > 2015)))
3302 count++;
3303
3304 nr_frags = skb_shinfo(skb)->nr_frags;
3305 for (f = 0; f < nr_frags; f++)
3306 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3307 max_txd_pwr);
3308 if (adapter->pcix_82544)
3309 count += nr_frags;
3310
3311
3312 if (hw->tx_pkt_filtering &&
3313 (hw->mac_type == e1000_82573))
3314 e1000_transfer_dhcp_info(adapter, skb);
3315
3316 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3317 /* Collision - tell upper layer to requeue */
3318 return NETDEV_TX_LOCKED;
3319
3320 /* need: count + 2 desc gap to keep tail from touching
3321 * head, otherwise try next time */
3322 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3323 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3324 return NETDEV_TX_BUSY;
3325 }
3326
3327 if (unlikely(hw->mac_type == e1000_82547)) {
3328 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3329 netif_stop_queue(netdev);
3330 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3331 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3332 return NETDEV_TX_BUSY;
3333 }
3334 }
3335
3336 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3337 tx_flags |= E1000_TX_FLAGS_VLAN;
3338 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3339 }
3340
3341 first = tx_ring->next_to_use;
3342
3343 tso = e1000_tso(adapter, tx_ring, skb);
3344 if (tso < 0) {
3345 dev_kfree_skb_any(skb);
3346 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3347 return NETDEV_TX_OK;
3348 }
3349
3350 if (likely(tso)) {
3351 tx_ring->last_tx_tso = 1;
3352 tx_flags |= E1000_TX_FLAGS_TSO;
3353 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3354 tx_flags |= E1000_TX_FLAGS_CSUM;
3355
3356 /* Old method was to assume IPv4 packet by default if TSO was enabled.
3357 * 82571 hardware supports TSO capabilities for IPv6 as well...
3358 * no longer assume, we must. */
3359 if (likely(skb->protocol == htons(ETH_P_IP)))
3360 tx_flags |= E1000_TX_FLAGS_IPV4;
3361
3362 e1000_tx_queue(adapter, tx_ring, tx_flags,
3363 e1000_tx_map(adapter, tx_ring, skb, first,
3364 max_per_txd, nr_frags, mss));
3365
3366 netdev->trans_start = jiffies;
3367
3368 /* Make sure there is space in the ring for the next send. */
3369 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3370
3371 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3372 return NETDEV_TX_OK;
3373 }
3374
3375 /**
3376 * e1000_tx_timeout - Respond to a Tx Hang
3377 * @netdev: network interface device structure
3378 **/
3379
3380 static void e1000_tx_timeout(struct net_device *netdev)
3381 {
3382 struct e1000_adapter *adapter = netdev_priv(netdev);
3383
3384 /* Do the reset outside of interrupt context */
3385 adapter->tx_timeout_count++;
3386 schedule_work(&adapter->reset_task);
3387 }
3388
3389 static void e1000_reset_task(struct work_struct *work)
3390 {
3391 struct e1000_adapter *adapter =
3392 container_of(work, struct e1000_adapter, reset_task);
3393
3394 e1000_reinit_locked(adapter);
3395 }
3396
3397 /**
3398 * e1000_get_stats - Get System Network Statistics
3399 * @netdev: network interface device structure
3400 *
3401 * Returns the address of the device statistics structure.
3402 * The statistics are actually updated from the timer callback.
3403 **/
3404
3405 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3406 {
3407 struct e1000_adapter *adapter = netdev_priv(netdev);
3408
3409 /* only return the current stats */
3410 return &adapter->net_stats;
3411 }
3412
3413 /**
3414 * e1000_change_mtu - Change the Maximum Transfer Unit
3415 * @netdev: network interface device structure
3416 * @new_mtu: new value for maximum frame size
3417 *
3418 * Returns 0 on success, negative on failure
3419 **/
3420
3421 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3422 {
3423 struct e1000_adapter *adapter = netdev_priv(netdev);
3424 struct e1000_hw *hw = &adapter->hw;
3425 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3426 u16 eeprom_data = 0;
3427
3428 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3429 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3430 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3431 return -EINVAL;
3432 }
3433
3434 /* Adapter-specific max frame size limits. */
3435 switch (hw->mac_type) {
3436 case e1000_undefined ... e1000_82542_rev2_1:
3437 case e1000_ich8lan:
3438 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3439 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3440 return -EINVAL;
3441 }
3442 break;
3443 case e1000_82573:
3444 /* Jumbo Frames not supported if:
3445 * - this is not an 82573L device
3446 * - ASPM is enabled in any way (0x1A bits 3:2) */
3447 e1000_read_eeprom(hw, EEPROM_INIT_3GIO_3, 1,
3448 &eeprom_data);
3449 if ((hw->device_id != E1000_DEV_ID_82573L) ||
3450 (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3451 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3452 DPRINTK(PROBE, ERR,
3453 "Jumbo Frames not supported.\n");
3454 return -EINVAL;
3455 }
3456 break;
3457 }
3458 /* ERT will be enabled later to enable wire speed receives */
3459
3460 /* fall through to get support */
3461 case e1000_82571:
3462 case e1000_82572:
3463 case e1000_80003es2lan:
3464 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3465 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3466 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3467 return -EINVAL;
3468 }
3469 break;
3470 default:
3471 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3472 break;
3473 }
3474
3475 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3476 * means we reserve 2 more, this pushes us to allocate from the next
3477 * larger slab size
3478 * i.e. RXBUFFER_2048 --> size-4096 slab */
3479
3480 if (max_frame <= E1000_RXBUFFER_256)
3481 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3482 else if (max_frame <= E1000_RXBUFFER_512)
3483 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3484 else if (max_frame <= E1000_RXBUFFER_1024)
3485 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3486 else if (max_frame <= E1000_RXBUFFER_2048)
3487 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3488 else if (max_frame <= E1000_RXBUFFER_4096)
3489 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3490 else if (max_frame <= E1000_RXBUFFER_8192)
3491 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3492 else if (max_frame <= E1000_RXBUFFER_16384)
3493 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3494
3495 /* adjust allocation if LPE protects us, and we aren't using SBP */
3496 if (!hw->tbi_compatibility_on &&
3497 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3498 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3499 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3500
3501 netdev->mtu = new_mtu;
3502 hw->max_frame_size = max_frame;
3503
3504 if (netif_running(netdev))
3505 e1000_reinit_locked(adapter);
3506
3507 return 0;
3508 }
3509
3510 /**
3511 * e1000_update_stats - Update the board statistics counters
3512 * @adapter: board private structure
3513 **/
3514
3515 void e1000_update_stats(struct e1000_adapter *adapter)
3516 {
3517 struct e1000_hw *hw = &adapter->hw;
3518 struct pci_dev *pdev = adapter->pdev;
3519 unsigned long flags;
3520 u16 phy_tmp;
3521
3522 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3523
3524 /*
3525 * Prevent stats update while adapter is being reset, or if the pci
3526 * connection is down.
3527 */
3528 if (adapter->link_speed == 0)
3529 return;
3530 if (pci_channel_offline(pdev))
3531 return;
3532
3533 spin_lock_irqsave(&adapter->stats_lock, flags);
3534
3535 /* these counters are modified from e1000_tbi_adjust_stats,
3536 * called from the interrupt context, so they must only
3537 * be written while holding adapter->stats_lock
3538 */
3539
3540 adapter->stats.crcerrs += er32(CRCERRS);
3541 adapter->stats.gprc += er32(GPRC);
3542 adapter->stats.gorcl += er32(GORCL);
3543 adapter->stats.gorch += er32(GORCH);
3544 adapter->stats.bprc += er32(BPRC);
3545 adapter->stats.mprc += er32(MPRC);
3546 adapter->stats.roc += er32(ROC);
3547
3548 if (hw->mac_type != e1000_ich8lan) {
3549 adapter->stats.prc64 += er32(PRC64);
3550 adapter->stats.prc127 += er32(PRC127);
3551 adapter->stats.prc255 += er32(PRC255);
3552 adapter->stats.prc511 += er32(PRC511);
3553 adapter->stats.prc1023 += er32(PRC1023);
3554 adapter->stats.prc1522 += er32(PRC1522);
3555 }
3556
3557 adapter->stats.symerrs += er32(SYMERRS);
3558 adapter->stats.mpc += er32(MPC);
3559 adapter->stats.scc += er32(SCC);
3560 adapter->stats.ecol += er32(ECOL);
3561 adapter->stats.mcc += er32(MCC);
3562 adapter->stats.latecol += er32(LATECOL);
3563 adapter->stats.dc += er32(DC);
3564 adapter->stats.sec += er32(SEC);
3565 adapter->stats.rlec += er32(RLEC);
3566 adapter->stats.xonrxc += er32(XONRXC);
3567 adapter->stats.xontxc += er32(XONTXC);
3568 adapter->stats.xoffrxc += er32(XOFFRXC);
3569 adapter->stats.xofftxc += er32(XOFFTXC);
3570 adapter->stats.fcruc += er32(FCRUC);
3571 adapter->stats.gptc += er32(GPTC);
3572 adapter->stats.gotcl += er32(GOTCL);
3573 adapter->stats.gotch += er32(GOTCH);
3574 adapter->stats.rnbc += er32(RNBC);
3575 adapter->stats.ruc += er32(RUC);
3576 adapter->stats.rfc += er32(RFC);
3577 adapter->stats.rjc += er32(RJC);
3578 adapter->stats.torl += er32(TORL);
3579 adapter->stats.torh += er32(TORH);
3580 adapter->stats.totl += er32(TOTL);
3581 adapter->stats.toth += er32(TOTH);
3582 adapter->stats.tpr += er32(TPR);
3583
3584 if (hw->mac_type != e1000_ich8lan) {
3585 adapter->stats.ptc64 += er32(PTC64);
3586 adapter->stats.ptc127 += er32(PTC127);
3587 adapter->stats.ptc255 += er32(PTC255);
3588 adapter->stats.ptc511 += er32(PTC511);
3589 adapter->stats.ptc1023 += er32(PTC1023);
3590 adapter->stats.ptc1522 += er32(PTC1522);
3591 }
3592
3593 adapter->stats.mptc += er32(MPTC);
3594 adapter->stats.bptc += er32(BPTC);
3595
3596 /* used for adaptive IFS */
3597
3598 hw->tx_packet_delta = er32(TPT);
3599 adapter->stats.tpt += hw->tx_packet_delta;
3600 hw->collision_delta = er32(COLC);
3601 adapter->stats.colc += hw->collision_delta;
3602
3603 if (hw->mac_type >= e1000_82543) {
3604 adapter->stats.algnerrc += er32(ALGNERRC);
3605 adapter->stats.rxerrc += er32(RXERRC);
3606 adapter->stats.tncrs += er32(TNCRS);
3607 adapter->stats.cexterr += er32(CEXTERR);
3608 adapter->stats.tsctc += er32(TSCTC);
3609 adapter->stats.tsctfc += er32(TSCTFC);
3610 }
3611 if (hw->mac_type > e1000_82547_rev_2) {
3612 adapter->stats.iac += er32(IAC);
3613 adapter->stats.icrxoc += er32(ICRXOC);
3614
3615 if (hw->mac_type != e1000_ich8lan) {
3616 adapter->stats.icrxptc += er32(ICRXPTC);
3617 adapter->stats.icrxatc += er32(ICRXATC);
3618 adapter->stats.ictxptc += er32(ICTXPTC);
3619 adapter->stats.ictxatc += er32(ICTXATC);
3620 adapter->stats.ictxqec += er32(ICTXQEC);
3621 adapter->stats.ictxqmtc += er32(ICTXQMTC);
3622 adapter->stats.icrxdmtc += er32(ICRXDMTC);
3623 }
3624 }
3625
3626 /* Fill out the OS statistics structure */
3627 adapter->net_stats.multicast = adapter->stats.mprc;
3628 adapter->net_stats.collisions = adapter->stats.colc;
3629
3630 /* Rx Errors */
3631
3632 /* RLEC on some newer hardware can be incorrect so build
3633 * our own version based on RUC and ROC */
3634 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3635 adapter->stats.crcerrs + adapter->stats.algnerrc +
3636 adapter->stats.ruc + adapter->stats.roc +
3637 adapter->stats.cexterr;
3638 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3639 adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3640 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3641 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3642 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3643
3644 /* Tx Errors */
3645 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3646 adapter->net_stats.tx_errors = adapter->stats.txerrc;
3647 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3648 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3649 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3650 if (hw->bad_tx_carr_stats_fd &&
3651 adapter->link_duplex == FULL_DUPLEX) {
3652 adapter->net_stats.tx_carrier_errors = 0;
3653 adapter->stats.tncrs = 0;
3654 }
3655
3656 /* Tx Dropped needs to be maintained elsewhere */
3657
3658 /* Phy Stats */
3659 if (hw->media_type == e1000_media_type_copper) {
3660 if ((adapter->link_speed == SPEED_1000) &&
3661 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3662 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3663 adapter->phy_stats.idle_errors += phy_tmp;
3664 }
3665
3666 if ((hw->mac_type <= e1000_82546) &&
3667 (hw->phy_type == e1000_phy_m88) &&
3668 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3669 adapter->phy_stats.receive_errors += phy_tmp;
3670 }
3671
3672 /* Management Stats */
3673 if (hw->has_smbus) {
3674 adapter->stats.mgptc += er32(MGTPTC);
3675 adapter->stats.mgprc += er32(MGTPRC);
3676 adapter->stats.mgpdc += er32(MGTPDC);
3677 }
3678
3679 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3680 }
3681
3682 /**
3683 * e1000_intr_msi - Interrupt Handler
3684 * @irq: interrupt number
3685 * @data: pointer to a network interface device structure
3686 **/
3687
3688 static irqreturn_t e1000_intr_msi(int irq, void *data)
3689 {
3690 struct net_device *netdev = data;
3691 struct e1000_adapter *adapter = netdev_priv(netdev);
3692 struct e1000_hw *hw = &adapter->hw;
3693 u32 icr = er32(ICR);
3694
3695 /* in NAPI mode read ICR disables interrupts using IAM */
3696
3697 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3698 hw->get_link_status = 1;
3699 /* 80003ES2LAN workaround-- For packet buffer work-around on
3700 * link down event; disable receives here in the ISR and reset
3701 * adapter in watchdog */
3702 if (netif_carrier_ok(netdev) &&
3703 (hw->mac_type == e1000_80003es2lan)) {
3704 /* disable receives */
3705 u32 rctl = er32(RCTL);
3706 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3707 }
3708 /* guard against interrupt when we're going down */
3709 if (!test_bit(__E1000_DOWN, &adapter->flags))
3710 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3711 }
3712
3713 if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3714 adapter->total_tx_bytes = 0;
3715 adapter->total_tx_packets = 0;
3716 adapter->total_rx_bytes = 0;
3717 adapter->total_rx_packets = 0;
3718 __netif_rx_schedule(netdev, &adapter->napi);
3719 } else
3720 e1000_irq_enable(adapter);
3721
3722 return IRQ_HANDLED;
3723 }
3724
3725 /**
3726 * e1000_intr - Interrupt Handler
3727 * @irq: interrupt number
3728 * @data: pointer to a network interface device structure
3729 **/
3730
3731 static irqreturn_t e1000_intr(int irq, void *data)
3732 {
3733 struct net_device *netdev = data;
3734 struct e1000_adapter *adapter = netdev_priv(netdev);
3735 struct e1000_hw *hw = &adapter->hw;
3736 u32 rctl, icr = er32(ICR);
3737
3738 if (unlikely(!icr))
3739 return IRQ_NONE; /* Not our interrupt */
3740
3741 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3742 * not set, then the adapter didn't send an interrupt */
3743 if (unlikely(hw->mac_type >= e1000_82571 &&
3744 !(icr & E1000_ICR_INT_ASSERTED)))
3745 return IRQ_NONE;
3746
3747 /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No
3748 * need for the IMC write */
3749
3750 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3751 hw->get_link_status = 1;
3752 /* 80003ES2LAN workaround--
3753 * For packet buffer work-around on link down event;
3754 * disable receives here in the ISR and
3755 * reset adapter in watchdog
3756 */
3757 if (netif_carrier_ok(netdev) &&
3758 (hw->mac_type == e1000_80003es2lan)) {
3759 /* disable receives */
3760 rctl = er32(RCTL);
3761 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3762 }
3763 /* guard against interrupt when we're going down */
3764 if (!test_bit(__E1000_DOWN, &adapter->flags))
3765 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3766 }
3767
3768 if (unlikely(hw->mac_type < e1000_82571)) {
3769 /* disable interrupts, without the synchronize_irq bit */
3770 ew32(IMC, ~0);
3771 E1000_WRITE_FLUSH();
3772 }
3773 if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3774 adapter->total_tx_bytes = 0;
3775 adapter->total_tx_packets = 0;
3776 adapter->total_rx_bytes = 0;
3777 adapter->total_rx_packets = 0;
3778 __netif_rx_schedule(netdev, &adapter->napi);
3779 } else
3780 /* this really should not happen! if it does it is basically a
3781 * bug, but not a hard error, so enable ints and continue */
3782 e1000_irq_enable(adapter);
3783
3784 return IRQ_HANDLED;
3785 }
3786
3787 /**
3788 * e1000_clean - NAPI Rx polling callback
3789 * @adapter: board private structure
3790 **/
3791 static int e1000_clean(struct napi_struct *napi, int budget)
3792 {
3793 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3794 struct net_device *poll_dev = adapter->netdev;
3795 int tx_cleaned = 0, work_done = 0;
3796
3797 adapter = netdev_priv(poll_dev);
3798
3799 /* e1000_clean is called per-cpu. This lock protects
3800 * tx_ring[0] from being cleaned by multiple cpus
3801 * simultaneously. A failure obtaining the lock means
3802 * tx_ring[0] is currently being cleaned anyway. */
3803 if (spin_trylock(&adapter->tx_queue_lock)) {
3804 tx_cleaned = e1000_clean_tx_irq(adapter,
3805 &adapter->tx_ring[0]);
3806 spin_unlock(&adapter->tx_queue_lock);
3807 }
3808
3809 adapter->clean_rx(adapter, &adapter->rx_ring[0],
3810 &work_done, budget);
3811
3812 if (tx_cleaned)
3813 work_done = budget;
3814
3815 /* If budget not fully consumed, exit the polling mode */
3816 if (work_done < budget) {
3817 if (likely(adapter->itr_setting & 3))
3818 e1000_set_itr(adapter);
3819 netif_rx_complete(poll_dev, napi);
3820 e1000_irq_enable(adapter);
3821 }
3822
3823 return work_done;
3824 }
3825
3826 /**
3827 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3828 * @adapter: board private structure
3829 **/
3830 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3831 struct e1000_tx_ring *tx_ring)
3832 {
3833 struct e1000_hw *hw = &adapter->hw;
3834 struct net_device *netdev = adapter->netdev;
3835 struct e1000_tx_desc *tx_desc, *eop_desc;
3836 struct e1000_buffer *buffer_info;
3837 unsigned int i, eop;
3838 unsigned int count = 0;
3839 bool cleaned = false;
3840 unsigned int total_tx_bytes=0, total_tx_packets=0;
3841
3842 i = tx_ring->next_to_clean;
3843 eop = tx_ring->buffer_info[i].next_to_watch;
3844 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3845
3846 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3847 for (cleaned = false; !cleaned; ) {
3848 tx_desc = E1000_TX_DESC(*tx_ring, i);
3849 buffer_info = &tx_ring->buffer_info[i];
3850 cleaned = (i == eop);
3851
3852 if (cleaned) {
3853 struct sk_buff *skb = buffer_info->skb;
3854 unsigned int segs, bytecount;
3855 segs = skb_shinfo(skb)->gso_segs ?: 1;
3856 /* multiply data chunks by size of headers */
3857 bytecount = ((segs - 1) * skb_headlen(skb)) +
3858 skb->len;
3859 total_tx_packets += segs;
3860 total_tx_bytes += bytecount;
3861 }
3862 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3863 tx_desc->upper.data = 0;
3864
3865 if (unlikely(++i == tx_ring->count)) i = 0;
3866 }
3867
3868 eop = tx_ring->buffer_info[i].next_to_watch;
3869 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3870 #define E1000_TX_WEIGHT 64
3871 /* weight of a sort for tx, to avoid endless transmit cleanup */
3872 if (count++ == E1000_TX_WEIGHT)
3873 break;
3874 }
3875
3876 tx_ring->next_to_clean = i;
3877
3878 #define TX_WAKE_THRESHOLD 32
3879 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
3880 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3881 /* Make sure that anybody stopping the queue after this
3882 * sees the new next_to_clean.
3883 */
3884 smp_mb();
3885 if (netif_queue_stopped(netdev)) {
3886 netif_wake_queue(netdev);
3887 ++adapter->restart_queue;
3888 }
3889 }
3890
3891 if (adapter->detect_tx_hung) {
3892 /* Detect a transmit hang in hardware, this serializes the
3893 * check with the clearing of time_stamp and movement of i */
3894 adapter->detect_tx_hung = false;
3895 if (tx_ring->buffer_info[eop].dma &&
3896 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3897 (adapter->tx_timeout_factor * HZ))
3898 && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3899
3900 /* detected Tx unit hang */
3901 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3902 " Tx Queue <%lu>\n"
3903 " TDH <%x>\n"
3904 " TDT <%x>\n"
3905 " next_to_use <%x>\n"
3906 " next_to_clean <%x>\n"
3907 "buffer_info[next_to_clean]\n"
3908 " time_stamp <%lx>\n"
3909 " next_to_watch <%x>\n"
3910 " jiffies <%lx>\n"
3911 " next_to_watch.status <%x>\n",
3912 (unsigned long)((tx_ring - adapter->tx_ring) /
3913 sizeof(struct e1000_tx_ring)),
3914 readl(hw->hw_addr + tx_ring->tdh),
3915 readl(hw->hw_addr + tx_ring->tdt),
3916 tx_ring->next_to_use,
3917 tx_ring->next_to_clean,
3918 tx_ring->buffer_info[eop].time_stamp,
3919 eop,
3920 jiffies,
3921 eop_desc->upper.fields.status);
3922 netif_stop_queue(netdev);
3923 }
3924 }
3925 adapter->total_tx_bytes += total_tx_bytes;
3926 adapter->total_tx_packets += total_tx_packets;
3927 adapter->net_stats.tx_bytes += total_tx_bytes;
3928 adapter->net_stats.tx_packets += total_tx_packets;
3929 return cleaned;
3930 }
3931
3932 /**
3933 * e1000_rx_checksum - Receive Checksum Offload for 82543
3934 * @adapter: board private structure
3935 * @status_err: receive descriptor status and error fields
3936 * @csum: receive descriptor csum field
3937 * @sk_buff: socket buffer with received data
3938 **/
3939
3940 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3941 u32 csum, struct sk_buff *skb)
3942 {
3943 struct e1000_hw *hw = &adapter->hw;
3944 u16 status = (u16)status_err;
3945 u8 errors = (u8)(status_err >> 24);
3946 skb->ip_summed = CHECKSUM_NONE;
3947
3948 /* 82543 or newer only */
3949 if (unlikely(hw->mac_type < e1000_82543)) return;
3950 /* Ignore Checksum bit is set */
3951 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3952 /* TCP/UDP checksum error bit is set */
3953 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3954 /* let the stack verify checksum errors */
3955 adapter->hw_csum_err++;
3956 return;
3957 }
3958 /* TCP/UDP Checksum has not been calculated */
3959 if (hw->mac_type <= e1000_82547_rev_2) {
3960 if (!(status & E1000_RXD_STAT_TCPCS))
3961 return;
3962 } else {
3963 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3964 return;
3965 }
3966 /* It must be a TCP or UDP packet with a valid checksum */
3967 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3968 /* TCP checksum is good */
3969 skb->ip_summed = CHECKSUM_UNNECESSARY;
3970 } else if (hw->mac_type > e1000_82547_rev_2) {
3971 /* IP fragment with UDP payload */
3972 /* Hardware complements the payload checksum, so we undo it
3973 * and then put the value in host order for further stack use.
3974 */
3975 __sum16 sum = (__force __sum16)htons(csum);
3976 skb->csum = csum_unfold(~sum);
3977 skb->ip_summed = CHECKSUM_COMPLETE;
3978 }
3979 adapter->hw_csum_good++;
3980 }
3981
3982 /**
3983 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3984 * @adapter: board private structure
3985 **/
3986 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3987 struct e1000_rx_ring *rx_ring,
3988 int *work_done, int work_to_do)
3989 {
3990 struct e1000_hw *hw = &adapter->hw;
3991 struct net_device *netdev = adapter->netdev;
3992 struct pci_dev *pdev = adapter->pdev;
3993 struct e1000_rx_desc *rx_desc, *next_rxd;
3994 struct e1000_buffer *buffer_info, *next_buffer;
3995 unsigned long flags;
3996 u32 length;
3997 u8 last_byte;
3998 unsigned int i;
3999 int cleaned_count = 0;
4000 bool cleaned = false;
4001 unsigned int total_rx_bytes=0, total_rx_packets=0;
4002
4003 i = rx_ring->next_to_clean;
4004 rx_desc = E1000_RX_DESC(*rx_ring, i);
4005 buffer_info = &rx_ring->buffer_info[i];
4006
4007 while (rx_desc->status & E1000_RXD_STAT_DD) {
4008 struct sk_buff *skb;
4009 u8 status;
4010
4011 if (*work_done >= work_to_do)
4012 break;
4013 (*work_done)++;
4014
4015 status = rx_desc->status;
4016 skb = buffer_info->skb;
4017 buffer_info->skb = NULL;
4018
4019 prefetch(skb->data - NET_IP_ALIGN);
4020
4021 if (++i == rx_ring->count) i = 0;
4022 next_rxd = E1000_RX_DESC(*rx_ring, i);
4023 prefetch(next_rxd);
4024
4025 next_buffer = &rx_ring->buffer_info[i];
4026
4027 cleaned = true;
4028 cleaned_count++;
4029 pci_unmap_single(pdev,
4030 buffer_info->dma,
4031 buffer_info->length,
4032 PCI_DMA_FROMDEVICE);
4033
4034 length = le16_to_cpu(rx_desc->length);
4035
4036 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4037 /* All receives must fit into a single buffer */
4038 E1000_DBG("%s: Receive packet consumed multiple"
4039 " buffers\n", netdev->name);
4040 /* recycle */
4041 buffer_info->skb = skb;
4042 goto next_desc;
4043 }
4044
4045 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4046 last_byte = *(skb->data + length - 1);
4047 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4048 last_byte)) {
4049 spin_lock_irqsave(&adapter->stats_lock, flags);
4050 e1000_tbi_adjust_stats(hw, &adapter->stats,
4051 length, skb->data);
4052 spin_unlock_irqrestore(&adapter->stats_lock,
4053 flags);
4054 length--;
4055 } else {
4056 /* recycle */
4057 buffer_info->skb = skb;
4058 goto next_desc;
4059 }
4060 }
4061
4062 /* adjust length to remove Ethernet CRC, this must be
4063 * done after the TBI_ACCEPT workaround above */
4064 length -= 4;
4065
4066 /* probably a little skewed due to removing CRC */
4067 total_rx_bytes += length;
4068 total_rx_packets++;
4069
4070 /* code added for copybreak, this should improve
4071 * performance for small packets with large amounts
4072 * of reassembly being done in the stack */
4073 if (length < copybreak) {
4074 struct sk_buff *new_skb =
4075 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4076 if (new_skb) {
4077 skb_reserve(new_skb, NET_IP_ALIGN);
4078 skb_copy_to_linear_data_offset(new_skb,
4079 -NET_IP_ALIGN,
4080 (skb->data -
4081 NET_IP_ALIGN),
4082 (length +
4083 NET_IP_ALIGN));
4084 /* save the skb in buffer_info as good */
4085 buffer_info->skb = skb;
4086 skb = new_skb;
4087 }
4088 /* else just continue with the old one */
4089 }
4090 /* end copybreak code */
4091 skb_put(skb, length);
4092
4093 /* Receive Checksum Offload */
4094 e1000_rx_checksum(adapter,
4095 (u32)(status) |
4096 ((u32)(rx_desc->errors) << 24),
4097 le16_to_cpu(rx_desc->csum), skb);
4098
4099 skb->protocol = eth_type_trans(skb, netdev);
4100
4101 if (unlikely(adapter->vlgrp &&
4102 (status & E1000_RXD_STAT_VP))) {
4103 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4104 le16_to_cpu(rx_desc->special));
4105 } else {
4106 netif_receive_skb(skb);
4107 }
4108
4109 next_desc:
4110 rx_desc->status = 0;
4111
4112 /* return some buffers to hardware, one at a time is too slow */
4113 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4114 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4115 cleaned_count = 0;
4116 }
4117
4118 /* use prefetched values */
4119 rx_desc = next_rxd;
4120 buffer_info = next_buffer;
4121 }
4122 rx_ring->next_to_clean = i;
4123
4124 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4125 if (cleaned_count)
4126 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4127
4128 adapter->total_rx_packets += total_rx_packets;
4129 adapter->total_rx_bytes += total_rx_bytes;
4130 adapter->net_stats.rx_bytes += total_rx_bytes;
4131 adapter->net_stats.rx_packets += total_rx_packets;
4132 return cleaned;
4133 }
4134
4135 /**
4136 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4137 * @adapter: address of board private structure
4138 **/
4139
4140 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4141 struct e1000_rx_ring *rx_ring,
4142 int cleaned_count)
4143 {
4144 struct e1000_hw *hw = &adapter->hw;
4145 struct net_device *netdev = adapter->netdev;
4146 struct pci_dev *pdev = adapter->pdev;
4147 struct e1000_rx_desc *rx_desc;
4148 struct e1000_buffer *buffer_info;
4149 struct sk_buff *skb;
4150 unsigned int i;
4151 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4152
4153 i = rx_ring->next_to_use;
4154 buffer_info = &rx_ring->buffer_info[i];
4155
4156 while (cleaned_count--) {
4157 skb = buffer_info->skb;
4158 if (skb) {
4159 skb_trim(skb, 0);
4160 goto map_skb;
4161 }
4162
4163 skb = netdev_alloc_skb(netdev, bufsz);
4164 if (unlikely(!skb)) {
4165 /* Better luck next round */
4166 adapter->alloc_rx_buff_failed++;
4167 break;
4168 }
4169
4170 /* Fix for errata 23, can't cross 64kB boundary */
4171 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4172 struct sk_buff *oldskb = skb;
4173 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4174 "at %p\n", bufsz, skb->data);
4175 /* Try again, without freeing the previous */
4176 skb = netdev_alloc_skb(netdev, bufsz);
4177 /* Failed allocation, critical failure */
4178 if (!skb) {
4179 dev_kfree_skb(oldskb);
4180 break;
4181 }
4182
4183 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4184 /* give up */
4185 dev_kfree_skb(skb);
4186 dev_kfree_skb(oldskb);
4187 break; /* while !buffer_info->skb */
4188 }
4189
4190 /* Use new allocation */
4191 dev_kfree_skb(oldskb);
4192 }
4193 /* Make buffer alignment 2 beyond a 16 byte boundary
4194 * this will result in a 16 byte aligned IP header after
4195 * the 14 byte MAC header is removed
4196 */
4197 skb_reserve(skb, NET_IP_ALIGN);
4198
4199 buffer_info->skb = skb;
4200 buffer_info->length = adapter->rx_buffer_len;
4201 map_skb:
4202 buffer_info->dma = pci_map_single(pdev,
4203 skb->data,
4204 adapter->rx_buffer_len,
4205 PCI_DMA_FROMDEVICE);
4206
4207 /* Fix for errata 23, can't cross 64kB boundary */
4208 if (!e1000_check_64k_bound(adapter,
4209 (void *)(unsigned long)buffer_info->dma,
4210 adapter->rx_buffer_len)) {
4211 DPRINTK(RX_ERR, ERR,
4212 "dma align check failed: %u bytes at %p\n",
4213 adapter->rx_buffer_len,
4214 (void *)(unsigned long)buffer_info->dma);
4215 dev_kfree_skb(skb);
4216 buffer_info->skb = NULL;
4217
4218 pci_unmap_single(pdev, buffer_info->dma,
4219 adapter->rx_buffer_len,
4220 PCI_DMA_FROMDEVICE);
4221
4222 break; /* while !buffer_info->skb */
4223 }
4224 rx_desc = E1000_RX_DESC(*rx_ring, i);
4225 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4226
4227 if (unlikely(++i == rx_ring->count))
4228 i = 0;
4229 buffer_info = &rx_ring->buffer_info[i];
4230 }
4231
4232 if (likely(rx_ring->next_to_use != i)) {
4233 rx_ring->next_to_use = i;
4234 if (unlikely(i-- == 0))
4235 i = (rx_ring->count - 1);
4236
4237 /* Force memory writes to complete before letting h/w
4238 * know there are new descriptors to fetch. (Only
4239 * applicable for weak-ordered memory model archs,
4240 * such as IA-64). */
4241 wmb();
4242 writel(i, hw->hw_addr + rx_ring->rdt);
4243 }
4244 }
4245
4246 /**
4247 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4248 * @adapter:
4249 **/
4250
4251 static void e1000_smartspeed(struct e1000_adapter *adapter)
4252 {
4253 struct e1000_hw *hw = &adapter->hw;
4254 u16 phy_status;
4255 u16 phy_ctrl;
4256
4257 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4258 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4259 return;
4260
4261 if (adapter->smartspeed == 0) {
4262 /* If Master/Slave config fault is asserted twice,
4263 * we assume back-to-back */
4264 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4265 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4266 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4267 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4268 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4269 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4270 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4271 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4272 phy_ctrl);
4273 adapter->smartspeed++;
4274 if (!e1000_phy_setup_autoneg(hw) &&
4275 !e1000_read_phy_reg(hw, PHY_CTRL,
4276 &phy_ctrl)) {
4277 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4278 MII_CR_RESTART_AUTO_NEG);
4279 e1000_write_phy_reg(hw, PHY_CTRL,
4280 phy_ctrl);
4281 }
4282 }
4283 return;
4284 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4285 /* If still no link, perhaps using 2/3 pair cable */
4286 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4287 phy_ctrl |= CR_1000T_MS_ENABLE;
4288 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4289 if (!e1000_phy_setup_autoneg(hw) &&
4290 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4291 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4292 MII_CR_RESTART_AUTO_NEG);
4293 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4294 }
4295 }
4296 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4297 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4298 adapter->smartspeed = 0;
4299 }
4300
4301 /**
4302 * e1000_ioctl -
4303 * @netdev:
4304 * @ifreq:
4305 * @cmd:
4306 **/
4307
4308 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4309 {
4310 switch (cmd) {
4311 case SIOCGMIIPHY:
4312 case SIOCGMIIREG:
4313 case SIOCSMIIREG:
4314 return e1000_mii_ioctl(netdev, ifr, cmd);
4315 default:
4316 return -EOPNOTSUPP;
4317 }
4318 }
4319
4320 /**
4321 * e1000_mii_ioctl -
4322 * @netdev:
4323 * @ifreq:
4324 * @cmd:
4325 **/
4326
4327 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4328 int cmd)
4329 {
4330 struct e1000_adapter *adapter = netdev_priv(netdev);
4331 struct e1000_hw *hw = &adapter->hw;
4332 struct mii_ioctl_data *data = if_mii(ifr);
4333 int retval;
4334 u16 mii_reg;
4335 u16 spddplx;
4336 unsigned long flags;
4337
4338 if (hw->media_type != e1000_media_type_copper)
4339 return -EOPNOTSUPP;
4340
4341 switch (cmd) {
4342 case SIOCGMIIPHY:
4343 data->phy_id = hw->phy_addr;
4344 break;
4345 case SIOCGMIIREG:
4346 if (!capable(CAP_NET_ADMIN))
4347 return -EPERM;
4348 spin_lock_irqsave(&adapter->stats_lock, flags);
4349 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4350 &data->val_out)) {
4351 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4352 return -EIO;
4353 }
4354 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4355 break;
4356 case SIOCSMIIREG:
4357 if (!capable(CAP_NET_ADMIN))
4358 return -EPERM;
4359 if (data->reg_num & ~(0x1F))
4360 return -EFAULT;
4361 mii_reg = data->val_in;
4362 spin_lock_irqsave(&adapter->stats_lock, flags);
4363 if (e1000_write_phy_reg(hw, data->reg_num,
4364 mii_reg)) {
4365 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4366 return -EIO;
4367 }
4368 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4369 if (hw->media_type == e1000_media_type_copper) {
4370 switch (data->reg_num) {
4371 case PHY_CTRL:
4372 if (mii_reg & MII_CR_POWER_DOWN)
4373 break;
4374 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4375 hw->autoneg = 1;
4376 hw->autoneg_advertised = 0x2F;
4377 } else {
4378 if (mii_reg & 0x40)
4379 spddplx = SPEED_1000;
4380 else if (mii_reg & 0x2000)
4381 spddplx = SPEED_100;
4382 else
4383 spddplx = SPEED_10;
4384 spddplx += (mii_reg & 0x100)
4385 ? DUPLEX_FULL :
4386 DUPLEX_HALF;
4387 retval = e1000_set_spd_dplx(adapter,
4388 spddplx);
4389 if (retval)
4390 return retval;
4391 }
4392 if (netif_running(adapter->netdev))
4393 e1000_reinit_locked(adapter);
4394 else
4395 e1000_reset(adapter);
4396 break;
4397 case M88E1000_PHY_SPEC_CTRL:
4398 case M88E1000_EXT_PHY_SPEC_CTRL:
4399 if (e1000_phy_reset(hw))
4400 return -EIO;
4401 break;
4402 }
4403 } else {
4404 switch (data->reg_num) {
4405 case PHY_CTRL:
4406 if (mii_reg & MII_CR_POWER_DOWN)
4407 break;
4408 if (netif_running(adapter->netdev))
4409 e1000_reinit_locked(adapter);
4410 else
4411 e1000_reset(adapter);
4412 break;
4413 }
4414 }
4415 break;
4416 default:
4417 return -EOPNOTSUPP;
4418 }
4419 return E1000_SUCCESS;
4420 }
4421
4422 void e1000_pci_set_mwi(struct e1000_hw *hw)
4423 {
4424 struct e1000_adapter *adapter = hw->back;
4425 int ret_val = pci_set_mwi(adapter->pdev);
4426
4427 if (ret_val)
4428 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4429 }
4430
4431 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4432 {
4433 struct e1000_adapter *adapter = hw->back;
4434
4435 pci_clear_mwi(adapter->pdev);
4436 }
4437
4438 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4439 {
4440 struct e1000_adapter *adapter = hw->back;
4441 return pcix_get_mmrbc(adapter->pdev);
4442 }
4443
4444 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4445 {
4446 struct e1000_adapter *adapter = hw->back;
4447 pcix_set_mmrbc(adapter->pdev, mmrbc);
4448 }
4449
4450 s32 e1000_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
4451 {
4452 struct e1000_adapter *adapter = hw->back;
4453 u16 cap_offset;
4454
4455 cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4456 if (!cap_offset)
4457 return -E1000_ERR_CONFIG;
4458
4459 pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4460
4461 return E1000_SUCCESS;
4462 }
4463
4464 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4465 {
4466 outl(value, port);
4467 }
4468
4469 static void e1000_vlan_rx_register(struct net_device *netdev,
4470 struct vlan_group *grp)
4471 {
4472 struct e1000_adapter *adapter = netdev_priv(netdev);
4473 struct e1000_hw *hw = &adapter->hw;
4474 u32 ctrl, rctl;
4475
4476 if (!test_bit(__E1000_DOWN, &adapter->flags))
4477 e1000_irq_disable(adapter);
4478 adapter->vlgrp = grp;
4479
4480 if (grp) {
4481 /* enable VLAN tag insert/strip */
4482 ctrl = er32(CTRL);
4483 ctrl |= E1000_CTRL_VME;
4484 ew32(CTRL, ctrl);
4485
4486 if (adapter->hw.mac_type != e1000_ich8lan) {
4487 /* enable VLAN receive filtering */
4488 rctl = er32(RCTL);
4489 rctl &= ~E1000_RCTL_CFIEN;
4490 ew32(RCTL, rctl);
4491 e1000_update_mng_vlan(adapter);
4492 }
4493 } else {
4494 /* disable VLAN tag insert/strip */
4495 ctrl = er32(CTRL);
4496 ctrl &= ~E1000_CTRL_VME;
4497 ew32(CTRL, ctrl);
4498
4499 if (adapter->hw.mac_type != e1000_ich8lan) {
4500 if (adapter->mng_vlan_id !=
4501 (u16)E1000_MNG_VLAN_NONE) {
4502 e1000_vlan_rx_kill_vid(netdev,
4503 adapter->mng_vlan_id);
4504 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4505 }
4506 }
4507 }
4508
4509 if (!test_bit(__E1000_DOWN, &adapter->flags))
4510 e1000_irq_enable(adapter);
4511 }
4512
4513 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4514 {
4515 struct e1000_adapter *adapter = netdev_priv(netdev);
4516 struct e1000_hw *hw = &adapter->hw;
4517 u32 vfta, index;
4518
4519 if ((hw->mng_cookie.status &
4520 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4521 (vid == adapter->mng_vlan_id))
4522 return;
4523 /* add VID to filter table */
4524 index = (vid >> 5) & 0x7F;
4525 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4526 vfta |= (1 << (vid & 0x1F));
4527 e1000_write_vfta(hw, index, vfta);
4528 }
4529
4530 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4531 {
4532 struct e1000_adapter *adapter = netdev_priv(netdev);
4533 struct e1000_hw *hw = &adapter->hw;
4534 u32 vfta, index;
4535
4536 if (!test_bit(__E1000_DOWN, &adapter->flags))
4537 e1000_irq_disable(adapter);
4538 vlan_group_set_device(adapter->vlgrp, vid, NULL);
4539 if (!test_bit(__E1000_DOWN, &adapter->flags))
4540 e1000_irq_enable(adapter);
4541
4542 if ((hw->mng_cookie.status &
4543 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4544 (vid == adapter->mng_vlan_id)) {
4545 /* release control to f/w */
4546 e1000_release_hw_control(adapter);
4547 return;
4548 }
4549
4550 /* remove VID from filter table */
4551 index = (vid >> 5) & 0x7F;
4552 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4553 vfta &= ~(1 << (vid & 0x1F));
4554 e1000_write_vfta(hw, index, vfta);
4555 }
4556
4557 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4558 {
4559 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4560
4561 if (adapter->vlgrp) {
4562 u16 vid;
4563 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4564 if (!vlan_group_get_device(adapter->vlgrp, vid))
4565 continue;
4566 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4567 }
4568 }
4569 }
4570
4571 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
4572 {
4573 struct e1000_hw *hw = &adapter->hw;
4574
4575 hw->autoneg = 0;
4576
4577 /* Fiber NICs only allow 1000 gbps Full duplex */
4578 if ((hw->media_type == e1000_media_type_fiber) &&
4579 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4580 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4581 return -EINVAL;
4582 }
4583
4584 switch (spddplx) {
4585 case SPEED_10 + DUPLEX_HALF:
4586 hw->forced_speed_duplex = e1000_10_half;
4587 break;
4588 case SPEED_10 + DUPLEX_FULL:
4589 hw->forced_speed_duplex = e1000_10_full;
4590 break;
4591 case SPEED_100 + DUPLEX_HALF:
4592 hw->forced_speed_duplex = e1000_100_half;
4593 break;
4594 case SPEED_100 + DUPLEX_FULL:
4595 hw->forced_speed_duplex = e1000_100_full;
4596 break;
4597 case SPEED_1000 + DUPLEX_FULL:
4598 hw->autoneg = 1;
4599 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4600 break;
4601 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4602 default:
4603 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4604 return -EINVAL;
4605 }
4606 return 0;
4607 }
4608
4609 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4610 {
4611 struct net_device *netdev = pci_get_drvdata(pdev);
4612 struct e1000_adapter *adapter = netdev_priv(netdev);
4613 struct e1000_hw *hw = &adapter->hw;
4614 u32 ctrl, ctrl_ext, rctl, status;
4615 u32 wufc = adapter->wol;
4616 #ifdef CONFIG_PM
4617 int retval = 0;
4618 #endif
4619
4620 netif_device_detach(netdev);
4621
4622 if (netif_running(netdev)) {
4623 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4624 e1000_down(adapter);
4625 }
4626
4627 #ifdef CONFIG_PM
4628 retval = pci_save_state(pdev);
4629 if (retval)
4630 return retval;
4631 #endif
4632
4633 status = er32(STATUS);
4634 if (status & E1000_STATUS_LU)
4635 wufc &= ~E1000_WUFC_LNKC;
4636
4637 if (wufc) {
4638 e1000_setup_rctl(adapter);
4639 e1000_set_rx_mode(netdev);
4640
4641 /* turn on all-multi mode if wake on multicast is enabled */
4642 if (wufc & E1000_WUFC_MC) {
4643 rctl = er32(RCTL);
4644 rctl |= E1000_RCTL_MPE;
4645 ew32(RCTL, rctl);
4646 }
4647
4648 if (hw->mac_type >= e1000_82540) {
4649 ctrl = er32(CTRL);
4650 /* advertise wake from D3Cold */
4651 #define E1000_CTRL_ADVD3WUC 0x00100000
4652 /* phy power management enable */
4653 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4654 ctrl |= E1000_CTRL_ADVD3WUC |
4655 E1000_CTRL_EN_PHY_PWR_MGMT;
4656 ew32(CTRL, ctrl);
4657 }
4658
4659 if (hw->media_type == e1000_media_type_fiber ||
4660 hw->media_type == e1000_media_type_internal_serdes) {
4661 /* keep the laser running in D3 */
4662 ctrl_ext = er32(CTRL_EXT);
4663 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4664 ew32(CTRL_EXT, ctrl_ext);
4665 }
4666
4667 /* Allow time for pending master requests to run */
4668 e1000_disable_pciex_master(hw);
4669
4670 ew32(WUC, E1000_WUC_PME_EN);
4671 ew32(WUFC, wufc);
4672 pci_enable_wake(pdev, PCI_D3hot, 1);
4673 pci_enable_wake(pdev, PCI_D3cold, 1);
4674 } else {
4675 ew32(WUC, 0);
4676 ew32(WUFC, 0);
4677 pci_enable_wake(pdev, PCI_D3hot, 0);
4678 pci_enable_wake(pdev, PCI_D3cold, 0);
4679 }
4680
4681 e1000_release_manageability(adapter);
4682
4683 /* make sure adapter isn't asleep if manageability is enabled */
4684 if (adapter->en_mng_pt) {
4685 pci_enable_wake(pdev, PCI_D3hot, 1);
4686 pci_enable_wake(pdev, PCI_D3cold, 1);
4687 }
4688
4689 if (hw->phy_type == e1000_phy_igp_3)
4690 e1000_phy_powerdown_workaround(hw);
4691
4692 if (netif_running(netdev))
4693 e1000_free_irq(adapter);
4694
4695 /* Release control of h/w to f/w. If f/w is AMT enabled, this
4696 * would have already happened in close and is redundant. */
4697 e1000_release_hw_control(adapter);
4698
4699 pci_disable_device(pdev);
4700
4701 pci_set_power_state(pdev, pci_choose_state(pdev, state));
4702
4703 return 0;
4704 }
4705
4706 #ifdef CONFIG_PM
4707 static int e1000_resume(struct pci_dev *pdev)
4708 {
4709 struct net_device *netdev = pci_get_drvdata(pdev);
4710 struct e1000_adapter *adapter = netdev_priv(netdev);
4711 struct e1000_hw *hw = &adapter->hw;
4712 u32 err;
4713
4714 pci_set_power_state(pdev, PCI_D0);
4715 pci_restore_state(pdev);
4716
4717 if (adapter->need_ioport)
4718 err = pci_enable_device(pdev);
4719 else
4720 err = pci_enable_device_mem(pdev);
4721 if (err) {
4722 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
4723 return err;
4724 }
4725 pci_set_master(pdev);
4726
4727 pci_enable_wake(pdev, PCI_D3hot, 0);
4728 pci_enable_wake(pdev, PCI_D3cold, 0);
4729
4730 if (netif_running(netdev)) {
4731 err = e1000_request_irq(adapter);
4732 if (err)
4733 return err;
4734 }
4735
4736 e1000_power_up_phy(adapter);
4737 e1000_reset(adapter);
4738 ew32(WUS, ~0);
4739
4740 e1000_init_manageability(adapter);
4741
4742 if (netif_running(netdev))
4743 e1000_up(adapter);
4744
4745 netif_device_attach(netdev);
4746
4747 /* If the controller is 82573 and f/w is AMT, do not set
4748 * DRV_LOAD until the interface is up. For all other cases,
4749 * let the f/w know that the h/w is now under the control
4750 * of the driver. */
4751 if (hw->mac_type != e1000_82573 ||
4752 !e1000_check_mng_mode(hw))
4753 e1000_get_hw_control(adapter);
4754
4755 return 0;
4756 }
4757 #endif
4758
4759 static void e1000_shutdown(struct pci_dev *pdev)
4760 {
4761 e1000_suspend(pdev, PMSG_SUSPEND);
4762 }
4763
4764 #ifdef CONFIG_NET_POLL_CONTROLLER
4765 /*
4766 * Polling 'interrupt' - used by things like netconsole to send skbs
4767 * without having to re-enable interrupts. It's not called while
4768 * the interrupt routine is executing.
4769 */
4770 static void e1000_netpoll(struct net_device *netdev)
4771 {
4772 struct e1000_adapter *adapter = netdev_priv(netdev);
4773
4774 disable_irq(adapter->pdev->irq);
4775 e1000_intr(adapter->pdev->irq, netdev);
4776 enable_irq(adapter->pdev->irq);
4777 }
4778 #endif
4779
4780 /**
4781 * e1000_io_error_detected - called when PCI error is detected
4782 * @pdev: Pointer to PCI device
4783 * @state: The current pci conneection state
4784 *
4785 * This function is called after a PCI bus error affecting
4786 * this device has been detected.
4787 */
4788 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4789 pci_channel_state_t state)
4790 {
4791 struct net_device *netdev = pci_get_drvdata(pdev);
4792 struct e1000_adapter *adapter = netdev_priv(netdev);
4793
4794 netif_device_detach(netdev);
4795
4796 if (netif_running(netdev))
4797 e1000_down(adapter);
4798 pci_disable_device(pdev);
4799
4800 /* Request a slot slot reset. */
4801 return PCI_ERS_RESULT_NEED_RESET;
4802 }
4803
4804 /**
4805 * e1000_io_slot_reset - called after the pci bus has been reset.
4806 * @pdev: Pointer to PCI device
4807 *
4808 * Restart the card from scratch, as if from a cold-boot. Implementation
4809 * resembles the first-half of the e1000_resume routine.
4810 */
4811 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4812 {
4813 struct net_device *netdev = pci_get_drvdata(pdev);
4814 struct e1000_adapter *adapter = netdev_priv(netdev);
4815 struct e1000_hw *hw = &adapter->hw;
4816 int err;
4817
4818 if (adapter->need_ioport)
4819 err = pci_enable_device(pdev);
4820 else
4821 err = pci_enable_device_mem(pdev);
4822 if (err) {
4823 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4824 return PCI_ERS_RESULT_DISCONNECT;
4825 }
4826 pci_set_master(pdev);
4827
4828 pci_enable_wake(pdev, PCI_D3hot, 0);
4829 pci_enable_wake(pdev, PCI_D3cold, 0);
4830
4831 e1000_reset(adapter);
4832 ew32(WUS, ~0);
4833
4834 return PCI_ERS_RESULT_RECOVERED;
4835 }
4836
4837 /**
4838 * e1000_io_resume - called when traffic can start flowing again.
4839 * @pdev: Pointer to PCI device
4840 *
4841 * This callback is called when the error recovery driver tells us that
4842 * its OK to resume normal operation. Implementation resembles the
4843 * second-half of the e1000_resume routine.
4844 */
4845 static void e1000_io_resume(struct pci_dev *pdev)
4846 {
4847 struct net_device *netdev = pci_get_drvdata(pdev);
4848 struct e1000_adapter *adapter = netdev_priv(netdev);
4849 struct e1000_hw *hw = &adapter->hw;
4850
4851 e1000_init_manageability(adapter);
4852
4853 if (netif_running(netdev)) {
4854 if (e1000_up(adapter)) {
4855 printk("e1000: can't bring device back up after reset\n");
4856 return;
4857 }
4858 }
4859
4860 netif_device_attach(netdev);
4861
4862 /* If the controller is 82573 and f/w is AMT, do not set
4863 * DRV_LOAD until the interface is up. For all other cases,
4864 * let the f/w know that the h/w is now under the control
4865 * of the driver. */
4866 if (hw->mac_type != e1000_82573 ||
4867 !e1000_check_mng_mode(hw))
4868 e1000_get_hw_control(adapter);
4869
4870 }
4871
4872 /* e1000_main.c */
ubuntu-bionic-kernel mirror