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e1000: remove no longer used code for pci read/write cfg
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / e1000 / e1000_main.c
blob5b129964e832926ac50a2b6e17de84d1fa32a809
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 #ifndef CONFIG_E1000_NAPI
35 #define DRIVERNAPI
36 #else
37 #define DRIVERNAPI "-NAPI"
38 #endif
39 #define DRV_VERSION "7.3.20-k2"DRIVERNAPI
40 const char e1000_driver_version[] = DRV_VERSION;
41 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
42
43 /* e1000_pci_tbl - PCI Device ID Table
44 *
45 * Last entry must be all 0s
46 *
47 * Macro expands to...
48 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
49 */
50 static struct pci_device_id e1000_pci_tbl[] = {
51 INTEL_E1000_ETHERNET_DEVICE(0x1000),
52 INTEL_E1000_ETHERNET_DEVICE(0x1001),
53 INTEL_E1000_ETHERNET_DEVICE(0x1004),
54 INTEL_E1000_ETHERNET_DEVICE(0x1008),
55 INTEL_E1000_ETHERNET_DEVICE(0x1009),
56 INTEL_E1000_ETHERNET_DEVICE(0x100C),
57 INTEL_E1000_ETHERNET_DEVICE(0x100D),
58 INTEL_E1000_ETHERNET_DEVICE(0x100E),
59 INTEL_E1000_ETHERNET_DEVICE(0x100F),
60 INTEL_E1000_ETHERNET_DEVICE(0x1010),
61 INTEL_E1000_ETHERNET_DEVICE(0x1011),
62 INTEL_E1000_ETHERNET_DEVICE(0x1012),
63 INTEL_E1000_ETHERNET_DEVICE(0x1013),
64 INTEL_E1000_ETHERNET_DEVICE(0x1014),
65 INTEL_E1000_ETHERNET_DEVICE(0x1015),
66 INTEL_E1000_ETHERNET_DEVICE(0x1016),
67 INTEL_E1000_ETHERNET_DEVICE(0x1017),
68 INTEL_E1000_ETHERNET_DEVICE(0x1018),
69 INTEL_E1000_ETHERNET_DEVICE(0x1019),
70 INTEL_E1000_ETHERNET_DEVICE(0x101A),
71 INTEL_E1000_ETHERNET_DEVICE(0x101D),
72 INTEL_E1000_ETHERNET_DEVICE(0x101E),
73 INTEL_E1000_ETHERNET_DEVICE(0x1026),
74 INTEL_E1000_ETHERNET_DEVICE(0x1027),
75 INTEL_E1000_ETHERNET_DEVICE(0x1028),
76 INTEL_E1000_ETHERNET_DEVICE(0x1075),
77 INTEL_E1000_ETHERNET_DEVICE(0x1076),
78 INTEL_E1000_ETHERNET_DEVICE(0x1077),
79 INTEL_E1000_ETHERNET_DEVICE(0x1078),
80 INTEL_E1000_ETHERNET_DEVICE(0x1079),
81 INTEL_E1000_ETHERNET_DEVICE(0x107A),
82 INTEL_E1000_ETHERNET_DEVICE(0x107B),
83 INTEL_E1000_ETHERNET_DEVICE(0x107C),
84 INTEL_E1000_ETHERNET_DEVICE(0x108A),
85 INTEL_E1000_ETHERNET_DEVICE(0x1099),
86 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
87 /* required last entry */
88 {0,}
89 };
90
91 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
92
93 int e1000_up(struct e1000_adapter *adapter);
94 void e1000_down(struct e1000_adapter *adapter);
95 void e1000_reinit_locked(struct e1000_adapter *adapter);
96 void e1000_reset(struct e1000_adapter *adapter);
97 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
98 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
99 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
100 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
101 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
102 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
103 struct e1000_tx_ring *txdr);
104 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
105 struct e1000_rx_ring *rxdr);
106 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
107 struct e1000_tx_ring *tx_ring);
108 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
109 struct e1000_rx_ring *rx_ring);
110 void e1000_update_stats(struct e1000_adapter *adapter);
111
112 static int e1000_init_module(void);
113 static void e1000_exit_module(void);
114 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
115 static void __devexit e1000_remove(struct pci_dev *pdev);
116 static int e1000_alloc_queues(struct e1000_adapter *adapter);
117 static int e1000_sw_init(struct e1000_adapter *adapter);
118 static int e1000_open(struct net_device *netdev);
119 static int e1000_close(struct net_device *netdev);
120 static void e1000_configure_tx(struct e1000_adapter *adapter);
121 static void e1000_configure_rx(struct e1000_adapter *adapter);
122 static void e1000_setup_rctl(struct e1000_adapter *adapter);
123 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
124 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
125 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
126 struct e1000_tx_ring *tx_ring);
127 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
128 struct e1000_rx_ring *rx_ring);
129 static void e1000_set_rx_mode(struct net_device *netdev);
130 static void e1000_update_phy_info(unsigned long data);
131 static void e1000_watchdog(unsigned long data);
132 static void e1000_82547_tx_fifo_stall(unsigned long data);
133 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
134 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
135 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
136 static int e1000_set_mac(struct net_device *netdev, void *p);
137 static irqreturn_t e1000_intr(int irq, void *data);
138 static irqreturn_t e1000_intr_msi(int irq, void *data);
139 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
140 struct e1000_tx_ring *tx_ring);
141 #ifdef CONFIG_E1000_NAPI
142 static int e1000_clean(struct napi_struct *napi, int budget);
143 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
144 struct e1000_rx_ring *rx_ring,
145 int *work_done, int work_to_do);
146 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
147 struct e1000_rx_ring *rx_ring,
148 int *work_done, int work_to_do);
149 #else
150 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
151 struct e1000_rx_ring *rx_ring);
152 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
153 struct e1000_rx_ring *rx_ring);
154 #endif
155 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
156 struct e1000_rx_ring *rx_ring,
157 int cleaned_count);
158 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
159 struct e1000_rx_ring *rx_ring,
160 int cleaned_count);
161 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
162 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
163 int cmd);
164 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
165 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
166 static void e1000_tx_timeout(struct net_device *dev);
167 static void e1000_reset_task(struct work_struct *work);
168 static void e1000_smartspeed(struct e1000_adapter *adapter);
169 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
170 struct sk_buff *skb);
171
172 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
173 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
174 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
175 static void e1000_restore_vlan(struct e1000_adapter *adapter);
176
177 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
178 #ifdef CONFIG_PM
179 static int e1000_resume(struct pci_dev *pdev);
180 #endif
181 static void e1000_shutdown(struct pci_dev *pdev);
182
183 #ifdef CONFIG_NET_POLL_CONTROLLER
184 /* for netdump / net console */
185 static void e1000_netpoll (struct net_device *netdev);
186 #endif
187
188 #define COPYBREAK_DEFAULT 256
189 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
190 module_param(copybreak, uint, 0644);
191 MODULE_PARM_DESC(copybreak,
192 "Maximum size of packet that is copied to a new buffer on receive");
193
194 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
195 pci_channel_state_t state);
196 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
197 static void e1000_io_resume(struct pci_dev *pdev);
198
199 static struct pci_error_handlers e1000_err_handler = {
200 .error_detected = e1000_io_error_detected,
201 .slot_reset = e1000_io_slot_reset,
202 .resume = e1000_io_resume,
203 };
204
205 static struct pci_driver e1000_driver = {
206 .name = e1000_driver_name,
207 .id_table = e1000_pci_tbl,
208 .probe = e1000_probe,
209 .remove = __devexit_p(e1000_remove),
210 #ifdef CONFIG_PM
211 /* Power Managment Hooks */
212 .suspend = e1000_suspend,
213 .resume = e1000_resume,
214 #endif
215 .shutdown = e1000_shutdown,
216 .err_handler = &e1000_err_handler
217 };
218
219 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
220 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
221 MODULE_LICENSE("GPL");
222 MODULE_VERSION(DRV_VERSION);
223
224 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
225 module_param(debug, int, 0);
226 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
227
228 /**
229 * e1000_init_module - Driver Registration Routine
230 *
231 * e1000_init_module is the first routine called when the driver is
232 * loaded. All it does is register with the PCI subsystem.
233 **/
234
235 static int __init
236 e1000_init_module(void)
237 {
238 int ret;
239 printk(KERN_INFO "%s - version %s\n",
240 e1000_driver_string, e1000_driver_version);
241
242 printk(KERN_INFO "%s\n", e1000_copyright);
243
244 ret = pci_register_driver(&e1000_driver);
245 if (copybreak != COPYBREAK_DEFAULT) {
246 if (copybreak == 0)
247 printk(KERN_INFO "e1000: copybreak disabled\n");
248 else
249 printk(KERN_INFO "e1000: copybreak enabled for "
250 "packets <= %u bytes\n", copybreak);
251 }
252 return ret;
253 }
254
255 module_init(e1000_init_module);
256
257 /**
258 * e1000_exit_module - Driver Exit Cleanup Routine
259 *
260 * e1000_exit_module is called just before the driver is removed
261 * from memory.
262 **/
263
264 static void __exit
265 e1000_exit_module(void)
266 {
267 pci_unregister_driver(&e1000_driver);
268 }
269
270 module_exit(e1000_exit_module);
271
272 static int e1000_request_irq(struct e1000_adapter *adapter)
273 {
274 struct net_device *netdev = adapter->netdev;
275 irq_handler_t handler = e1000_intr;
276 int irq_flags = IRQF_SHARED;
277 int err;
278
279 if (adapter->hw.mac_type >= e1000_82571) {
280 adapter->have_msi = !pci_enable_msi(adapter->pdev);
281 if (adapter->have_msi) {
282 handler = e1000_intr_msi;
283 irq_flags = 0;
284 }
285 }
286
287 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
288 netdev);
289 if (err) {
290 if (adapter->have_msi)
291 pci_disable_msi(adapter->pdev);
292 DPRINTK(PROBE, ERR,
293 "Unable to allocate interrupt Error: %d\n", err);
294 }
295
296 return err;
297 }
298
299 static void e1000_free_irq(struct e1000_adapter *adapter)
300 {
301 struct net_device *netdev = adapter->netdev;
302
303 free_irq(adapter->pdev->irq, netdev);
304
305 if (adapter->have_msi)
306 pci_disable_msi(adapter->pdev);
307 }
308
309 /**
310 * e1000_irq_disable - Mask off interrupt generation on the NIC
311 * @adapter: board private structure
312 **/
313
314 static void
315 e1000_irq_disable(struct e1000_adapter *adapter)
316 {
317 atomic_inc(&adapter->irq_sem);
318 E1000_WRITE_REG(&adapter->hw, IMC, ~0);
319 E1000_WRITE_FLUSH(&adapter->hw);
320 synchronize_irq(adapter->pdev->irq);
321 }
322
323 /**
324 * e1000_irq_enable - Enable default interrupt generation settings
325 * @adapter: board private structure
326 **/
327
328 static void
329 e1000_irq_enable(struct e1000_adapter *adapter)
330 {
331 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
332 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
333 E1000_WRITE_FLUSH(&adapter->hw);
334 }
335 }
336
337 static void
338 e1000_update_mng_vlan(struct e1000_adapter *adapter)
339 {
340 struct net_device *netdev = adapter->netdev;
341 uint16_t vid = adapter->hw.mng_cookie.vlan_id;
342 uint16_t old_vid = adapter->mng_vlan_id;
343 if (adapter->vlgrp) {
344 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
345 if (adapter->hw.mng_cookie.status &
346 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
347 e1000_vlan_rx_add_vid(netdev, vid);
348 adapter->mng_vlan_id = vid;
349 } else
350 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
351
352 if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
353 (vid != old_vid) &&
354 !vlan_group_get_device(adapter->vlgrp, old_vid))
355 e1000_vlan_rx_kill_vid(netdev, old_vid);
356 } else
357 adapter->mng_vlan_id = vid;
358 }
359 }
360
361 /**
362 * e1000_release_hw_control - release control of the h/w to f/w
363 * @adapter: address of board private structure
364 *
365 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
366 * For ASF and Pass Through versions of f/w this means that the
367 * driver is no longer loaded. For AMT version (only with 82573) i
368 * of the f/w this means that the network i/f is closed.
369 *
370 **/
371
372 static void
373 e1000_release_hw_control(struct e1000_adapter *adapter)
374 {
375 uint32_t ctrl_ext;
376 uint32_t swsm;
377
378 /* Let firmware taken over control of h/w */
379 switch (adapter->hw.mac_type) {
380 case e1000_82573:
381 swsm = E1000_READ_REG(&adapter->hw, SWSM);
382 E1000_WRITE_REG(&adapter->hw, SWSM,
383 swsm & ~E1000_SWSM_DRV_LOAD);
384 break;
385 case e1000_82571:
386 case e1000_82572:
387 case e1000_80003es2lan:
388 case e1000_ich8lan:
389 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
390 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
391 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
392 break;
393 default:
394 break;
395 }
396 }
397
398 /**
399 * e1000_get_hw_control - get control of the h/w from f/w
400 * @adapter: address of board private structure
401 *
402 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
403 * For ASF and Pass Through versions of f/w this means that
404 * the driver is loaded. For AMT version (only with 82573)
405 * of the f/w this means that the network i/f is open.
406 *
407 **/
408
409 static void
410 e1000_get_hw_control(struct e1000_adapter *adapter)
411 {
412 uint32_t ctrl_ext;
413 uint32_t swsm;
414
415 /* Let firmware know the driver has taken over */
416 switch (adapter->hw.mac_type) {
417 case e1000_82573:
418 swsm = E1000_READ_REG(&adapter->hw, SWSM);
419 E1000_WRITE_REG(&adapter->hw, SWSM,
420 swsm | E1000_SWSM_DRV_LOAD);
421 break;
422 case e1000_82571:
423 case e1000_82572:
424 case e1000_80003es2lan:
425 case e1000_ich8lan:
426 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
427 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
428 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
429 break;
430 default:
431 break;
432 }
433 }
434
435 static void
436 e1000_init_manageability(struct e1000_adapter *adapter)
437 {
438 if (adapter->en_mng_pt) {
439 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
440
441 /* disable hardware interception of ARP */
442 manc &= ~(E1000_MANC_ARP_EN);
443
444 /* enable receiving management packets to the host */
445 /* this will probably generate destination unreachable messages
446 * from the host OS, but the packets will be handled on SMBUS */
447 if (adapter->hw.has_manc2h) {
448 uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);
449
450 manc |= E1000_MANC_EN_MNG2HOST;
451 #define E1000_MNG2HOST_PORT_623 (1 << 5)
452 #define E1000_MNG2HOST_PORT_664 (1 << 6)
453 manc2h |= E1000_MNG2HOST_PORT_623;
454 manc2h |= E1000_MNG2HOST_PORT_664;
455 E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
456 }
457
458 E1000_WRITE_REG(&adapter->hw, MANC, manc);
459 }
460 }
461
462 static void
463 e1000_release_manageability(struct e1000_adapter *adapter)
464 {
465 if (adapter->en_mng_pt) {
466 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
467
468 /* re-enable hardware interception of ARP */
469 manc |= E1000_MANC_ARP_EN;
470
471 if (adapter->hw.has_manc2h)
472 manc &= ~E1000_MANC_EN_MNG2HOST;
473
474 /* don't explicitly have to mess with MANC2H since
475 * MANC has an enable disable that gates MANC2H */
476
477 E1000_WRITE_REG(&adapter->hw, MANC, manc);
478 }
479 }
480
481 /**
482 * e1000_configure - configure the hardware for RX and TX
483 * @adapter = private board structure
484 **/
485 static void e1000_configure(struct e1000_adapter *adapter)
486 {
487 struct net_device *netdev = adapter->netdev;
488 int i;
489
490 e1000_set_rx_mode(netdev);
491
492 e1000_restore_vlan(adapter);
493 e1000_init_manageability(adapter);
494
495 e1000_configure_tx(adapter);
496 e1000_setup_rctl(adapter);
497 e1000_configure_rx(adapter);
498 /* call E1000_DESC_UNUSED which always leaves
499 * at least 1 descriptor unused to make sure
500 * next_to_use != next_to_clean */
501 for (i = 0; i < adapter->num_rx_queues; i++) {
502 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
503 adapter->alloc_rx_buf(adapter, ring,
504 E1000_DESC_UNUSED(ring));
505 }
506
507 adapter->tx_queue_len = netdev->tx_queue_len;
508 }
509
510 int e1000_up(struct e1000_adapter *adapter)
511 {
512 /* hardware has been reset, we need to reload some things */
513 e1000_configure(adapter);
514
515 clear_bit(__E1000_DOWN, &adapter->flags);
516
517 #ifdef CONFIG_E1000_NAPI
518 napi_enable(&adapter->napi);
519 #endif
520 e1000_irq_enable(adapter);
521
522 /* fire a link change interrupt to start the watchdog */
523 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
524 return 0;
525 }
526
527 /**
528 * e1000_power_up_phy - restore link in case the phy was powered down
529 * @adapter: address of board private structure
530 *
531 * The phy may be powered down to save power and turn off link when the
532 * driver is unloaded and wake on lan is not enabled (among others)
533 * *** this routine MUST be followed by a call to e1000_reset ***
534 *
535 **/
536
537 void e1000_power_up_phy(struct e1000_adapter *adapter)
538 {
539 uint16_t mii_reg = 0;
540
541 /* Just clear the power down bit to wake the phy back up */
542 if (adapter->hw.media_type == e1000_media_type_copper) {
543 /* according to the manual, the phy will retain its
544 * settings across a power-down/up cycle */
545 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
546 mii_reg &= ~MII_CR_POWER_DOWN;
547 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
548 }
549 }
550
551 static void e1000_power_down_phy(struct e1000_adapter *adapter)
552 {
553 /* Power down the PHY so no link is implied when interface is down *
554 * The PHY cannot be powered down if any of the following is TRUE *
555 * (a) WoL is enabled
556 * (b) AMT is active
557 * (c) SoL/IDER session is active */
558 if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
559 adapter->hw.media_type == e1000_media_type_copper) {
560 uint16_t mii_reg = 0;
561
562 switch (adapter->hw.mac_type) {
563 case e1000_82540:
564 case e1000_82545:
565 case e1000_82545_rev_3:
566 case e1000_82546:
567 case e1000_82546_rev_3:
568 case e1000_82541:
569 case e1000_82541_rev_2:
570 case e1000_82547:
571 case e1000_82547_rev_2:
572 if (E1000_READ_REG(&adapter->hw, MANC) &
573 E1000_MANC_SMBUS_EN)
574 goto out;
575 break;
576 case e1000_82571:
577 case e1000_82572:
578 case e1000_82573:
579 case e1000_80003es2lan:
580 case e1000_ich8lan:
581 if (e1000_check_mng_mode(&adapter->hw) ||
582 e1000_check_phy_reset_block(&adapter->hw))
583 goto out;
584 break;
585 default:
586 goto out;
587 }
588 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
589 mii_reg |= MII_CR_POWER_DOWN;
590 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
591 mdelay(1);
592 }
593 out:
594 return;
595 }
596
597 void
598 e1000_down(struct e1000_adapter *adapter)
599 {
600 struct net_device *netdev = adapter->netdev;
601
602 /* signal that we're down so the interrupt handler does not
603 * reschedule our watchdog timer */
604 set_bit(__E1000_DOWN, &adapter->flags);
605
606 #ifdef CONFIG_E1000_NAPI
607 napi_disable(&adapter->napi);
608 atomic_set(&adapter->irq_sem, 0);
609 #endif
610 e1000_irq_disable(adapter);
611
612 del_timer_sync(&adapter->tx_fifo_stall_timer);
613 del_timer_sync(&adapter->watchdog_timer);
614 del_timer_sync(&adapter->phy_info_timer);
615
616 netdev->tx_queue_len = adapter->tx_queue_len;
617 adapter->link_speed = 0;
618 adapter->link_duplex = 0;
619 netif_carrier_off(netdev);
620 netif_stop_queue(netdev);
621
622 e1000_reset(adapter);
623 e1000_clean_all_tx_rings(adapter);
624 e1000_clean_all_rx_rings(adapter);
625 }
626
627 void
628 e1000_reinit_locked(struct e1000_adapter *adapter)
629 {
630 WARN_ON(in_interrupt());
631 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
632 msleep(1);
633 e1000_down(adapter);
634 e1000_up(adapter);
635 clear_bit(__E1000_RESETTING, &adapter->flags);
636 }
637
638 void
639 e1000_reset(struct e1000_adapter *adapter)
640 {
641 uint32_t pba = 0, tx_space, min_tx_space, min_rx_space;
642 uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
643 boolean_t legacy_pba_adjust = FALSE;
644
645 /* Repartition Pba for greater than 9k mtu
646 * To take effect CTRL.RST is required.
647 */
648
649 switch (adapter->hw.mac_type) {
650 case e1000_82542_rev2_0:
651 case e1000_82542_rev2_1:
652 case e1000_82543:
653 case e1000_82544:
654 case e1000_82540:
655 case e1000_82541:
656 case e1000_82541_rev_2:
657 legacy_pba_adjust = TRUE;
658 pba = E1000_PBA_48K;
659 break;
660 case e1000_82545:
661 case e1000_82545_rev_3:
662 case e1000_82546:
663 case e1000_82546_rev_3:
664 pba = E1000_PBA_48K;
665 break;
666 case e1000_82547:
667 case e1000_82547_rev_2:
668 legacy_pba_adjust = TRUE;
669 pba = E1000_PBA_30K;
670 break;
671 case e1000_82571:
672 case e1000_82572:
673 case e1000_80003es2lan:
674 pba = E1000_PBA_38K;
675 break;
676 case e1000_82573:
677 pba = E1000_PBA_20K;
678 break;
679 case e1000_ich8lan:
680 pba = E1000_PBA_8K;
681 case e1000_undefined:
682 case e1000_num_macs:
683 break;
684 }
685
686 if (legacy_pba_adjust == TRUE) {
687 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
688 pba -= 8; /* allocate more FIFO for Tx */
689
690 if (adapter->hw.mac_type == e1000_82547) {
691 adapter->tx_fifo_head = 0;
692 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
693 adapter->tx_fifo_size =
694 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
695 atomic_set(&adapter->tx_fifo_stall, 0);
696 }
697 } else if (adapter->hw.max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
698 /* adjust PBA for jumbo frames */
699 E1000_WRITE_REG(&adapter->hw, PBA, pba);
700
701 /* To maintain wire speed transmits, the Tx FIFO should be
702 * large enough to accomodate two full transmit packets,
703 * rounded up to the next 1KB and expressed in KB. Likewise,
704 * the Rx FIFO should be large enough to accomodate at least
705 * one full receive packet and is similarly rounded up and
706 * expressed in KB. */
707 pba = E1000_READ_REG(&adapter->hw, PBA);
708 /* upper 16 bits has Tx packet buffer allocation size in KB */
709 tx_space = pba >> 16;
710 /* lower 16 bits has Rx packet buffer allocation size in KB */
711 pba &= 0xffff;
712 /* don't include ethernet FCS because hardware appends/strips */
713 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
714 VLAN_TAG_SIZE;
715 min_tx_space = min_rx_space;
716 min_tx_space *= 2;
717 min_tx_space = ALIGN(min_tx_space, 1024);
718 min_tx_space >>= 10;
719 min_rx_space = ALIGN(min_rx_space, 1024);
720 min_rx_space >>= 10;
721
722 /* If current Tx allocation is less than the min Tx FIFO size,
723 * and the min Tx FIFO size is less than the current Rx FIFO
724 * allocation, take space away from current Rx allocation */
725 if (tx_space < min_tx_space &&
726 ((min_tx_space - tx_space) < pba)) {
727 pba = pba - (min_tx_space - tx_space);
728
729 /* PCI/PCIx hardware has PBA alignment constraints */
730 switch (adapter->hw.mac_type) {
731 case e1000_82545 ... e1000_82546_rev_3:
732 pba &= ~(E1000_PBA_8K - 1);
733 break;
734 default:
735 break;
736 }
737
738 /* if short on rx space, rx wins and must trump tx
739 * adjustment or use Early Receive if available */
740 if (pba < min_rx_space) {
741 switch (adapter->hw.mac_type) {
742 case e1000_82573:
743 /* ERT enabled in e1000_configure_rx */
744 break;
745 default:
746 pba = min_rx_space;
747 break;
748 }
749 }
750 }
751 }
752
753 E1000_WRITE_REG(&adapter->hw, PBA, pba);
754
755 /* flow control settings */
756 /* Set the FC high water mark to 90% of the FIFO size.
757 * Required to clear last 3 LSB */
758 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
759 /* We can't use 90% on small FIFOs because the remainder
760 * would be less than 1 full frame. In this case, we size
761 * it to allow at least a full frame above the high water
762 * mark. */
763 if (pba < E1000_PBA_16K)
764 fc_high_water_mark = (pba * 1024) - 1600;
765
766 adapter->hw.fc_high_water = fc_high_water_mark;
767 adapter->hw.fc_low_water = fc_high_water_mark - 8;
768 if (adapter->hw.mac_type == e1000_80003es2lan)
769 adapter->hw.fc_pause_time = 0xFFFF;
770 else
771 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
772 adapter->hw.fc_send_xon = 1;
773 adapter->hw.fc = adapter->hw.original_fc;
774
775 /* Allow time for pending master requests to run */
776 e1000_reset_hw(&adapter->hw);
777 if (adapter->hw.mac_type >= e1000_82544)
778 E1000_WRITE_REG(&adapter->hw, WUC, 0);
779
780 if (e1000_init_hw(&adapter->hw))
781 DPRINTK(PROBE, ERR, "Hardware Error\n");
782 e1000_update_mng_vlan(adapter);
783
784 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
785 if (adapter->hw.mac_type >= e1000_82544 &&
786 adapter->hw.mac_type <= e1000_82547_rev_2 &&
787 adapter->hw.autoneg == 1 &&
788 adapter->hw.autoneg_advertised == ADVERTISE_1000_FULL) {
789 uint32_t ctrl = E1000_READ_REG(&adapter->hw, CTRL);
790 /* clear phy power management bit if we are in gig only mode,
791 * which if enabled will attempt negotiation to 100Mb, which
792 * can cause a loss of link at power off or driver unload */
793 ctrl &= ~E1000_CTRL_SWDPIN3;
794 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
795 }
796
797 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
798 E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
799
800 e1000_reset_adaptive(&adapter->hw);
801 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
802
803 if (!adapter->smart_power_down &&
804 (adapter->hw.mac_type == e1000_82571 ||
805 adapter->hw.mac_type == e1000_82572)) {
806 uint16_t phy_data = 0;
807 /* speed up time to link by disabling smart power down, ignore
808 * the return value of this function because there is nothing
809 * different we would do if it failed */
810 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
811 &phy_data);
812 phy_data &= ~IGP02E1000_PM_SPD;
813 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
814 phy_data);
815 }
816
817 e1000_release_manageability(adapter);
818 }
819
820 /**
821 * e1000_probe - Device Initialization Routine
822 * @pdev: PCI device information struct
823 * @ent: entry in e1000_pci_tbl
824 *
825 * Returns 0 on success, negative on failure
826 *
827 * e1000_probe initializes an adapter identified by a pci_dev structure.
828 * The OS initialization, configuring of the adapter private structure,
829 * and a hardware reset occur.
830 **/
831
832 static int __devinit
833 e1000_probe(struct pci_dev *pdev,
834 const struct pci_device_id *ent)
835 {
836 struct net_device *netdev;
837 struct e1000_adapter *adapter;
838 unsigned long mmio_start, mmio_len;
839 unsigned long flash_start, flash_len;
840
841 static int cards_found = 0;
842 static int global_quad_port_a = 0; /* global ksp3 port a indication */
843 int i, err, pci_using_dac;
844 uint16_t eeprom_data = 0;
845 uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
846 DECLARE_MAC_BUF(mac);
847
848 if ((err = pci_enable_device(pdev)))
849 return err;
850
851 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
852 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
853 pci_using_dac = 1;
854 } else {
855 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
856 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
857 E1000_ERR("No usable DMA configuration, aborting\n");
858 goto err_dma;
859 }
860 pci_using_dac = 0;
861 }
862
863 if ((err = pci_request_regions(pdev, e1000_driver_name)))
864 goto err_pci_reg;
865
866 pci_set_master(pdev);
867
868 err = -ENOMEM;
869 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
870 if (!netdev)
871 goto err_alloc_etherdev;
872
873 SET_NETDEV_DEV(netdev, &pdev->dev);
874
875 pci_set_drvdata(pdev, netdev);
876 adapter = netdev_priv(netdev);
877 adapter->netdev = netdev;
878 adapter->pdev = pdev;
879 adapter->hw.back = adapter;
880 adapter->msg_enable = (1 << debug) - 1;
881
882 mmio_start = pci_resource_start(pdev, BAR_0);
883 mmio_len = pci_resource_len(pdev, BAR_0);
884
885 err = -EIO;
886 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
887 if (!adapter->hw.hw_addr)
888 goto err_ioremap;
889
890 for (i = BAR_1; i <= BAR_5; i++) {
891 if (pci_resource_len(pdev, i) == 0)
892 continue;
893 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
894 adapter->hw.io_base = pci_resource_start(pdev, i);
895 break;
896 }
897 }
898
899 netdev->open = &e1000_open;
900 netdev->stop = &e1000_close;
901 netdev->hard_start_xmit = &e1000_xmit_frame;
902 netdev->get_stats = &e1000_get_stats;
903 netdev->set_rx_mode = &e1000_set_rx_mode;
904 netdev->set_mac_address = &e1000_set_mac;
905 netdev->change_mtu = &e1000_change_mtu;
906 netdev->do_ioctl = &e1000_ioctl;
907 e1000_set_ethtool_ops(netdev);
908 netdev->tx_timeout = &e1000_tx_timeout;
909 netdev->watchdog_timeo = 5 * HZ;
910 #ifdef CONFIG_E1000_NAPI
911 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
912 #endif
913 netdev->vlan_rx_register = e1000_vlan_rx_register;
914 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
915 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
916 #ifdef CONFIG_NET_POLL_CONTROLLER
917 netdev->poll_controller = e1000_netpoll;
918 #endif
919 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
920
921 netdev->mem_start = mmio_start;
922 netdev->mem_end = mmio_start + mmio_len;
923 netdev->base_addr = adapter->hw.io_base;
924
925 adapter->bd_number = cards_found;
926
927 /* setup the private structure */
928
929 if ((err = e1000_sw_init(adapter)))
930 goto err_sw_init;
931
932 err = -EIO;
933 /* Flash BAR mapping must happen after e1000_sw_init
934 * because it depends on mac_type */
935 if ((adapter->hw.mac_type == e1000_ich8lan) &&
936 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
937 flash_start = pci_resource_start(pdev, 1);
938 flash_len = pci_resource_len(pdev, 1);
939 adapter->hw.flash_address = ioremap(flash_start, flash_len);
940 if (!adapter->hw.flash_address)
941 goto err_flashmap;
942 }
943
944 if (e1000_check_phy_reset_block(&adapter->hw))
945 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
946
947 if (adapter->hw.mac_type >= e1000_82543) {
948 netdev->features = NETIF_F_SG |
949 NETIF_F_HW_CSUM |
950 NETIF_F_HW_VLAN_TX |
951 NETIF_F_HW_VLAN_RX |
952 NETIF_F_HW_VLAN_FILTER;
953 if (adapter->hw.mac_type == e1000_ich8lan)
954 netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
955 }
956
957 if ((adapter->hw.mac_type >= e1000_82544) &&
958 (adapter->hw.mac_type != e1000_82547))
959 netdev->features |= NETIF_F_TSO;
960
961 if (adapter->hw.mac_type > e1000_82547_rev_2)
962 netdev->features |= NETIF_F_TSO6;
963 if (pci_using_dac)
964 netdev->features |= NETIF_F_HIGHDMA;
965
966 netdev->features |= NETIF_F_LLTX;
967
968 adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
969
970 /* initialize eeprom parameters */
971
972 if (e1000_init_eeprom_params(&adapter->hw)) {
973 E1000_ERR("EEPROM initialization failed\n");
974 goto err_eeprom;
975 }
976
977 /* before reading the EEPROM, reset the controller to
978 * put the device in a known good starting state */
979
980 e1000_reset_hw(&adapter->hw);
981
982 /* make sure the EEPROM is good */
983
984 if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
985 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
986 goto err_eeprom;
987 }
988
989 /* copy the MAC address out of the EEPROM */
990
991 if (e1000_read_mac_addr(&adapter->hw))
992 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
993 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
994 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
995
996 if (!is_valid_ether_addr(netdev->perm_addr)) {
997 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
998 goto err_eeprom;
999 }
1000
1001 e1000_get_bus_info(&adapter->hw);
1002
1003 init_timer(&adapter->tx_fifo_stall_timer);
1004 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1005 adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
1006
1007 init_timer(&adapter->watchdog_timer);
1008 adapter->watchdog_timer.function = &e1000_watchdog;
1009 adapter->watchdog_timer.data = (unsigned long) adapter;
1010
1011 init_timer(&adapter->phy_info_timer);
1012 adapter->phy_info_timer.function = &e1000_update_phy_info;
1013 adapter->phy_info_timer.data = (unsigned long) adapter;
1014
1015 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1016
1017 e1000_check_options(adapter);
1018
1019 /* Initial Wake on LAN setting
1020 * If APM wake is enabled in the EEPROM,
1021 * enable the ACPI Magic Packet filter
1022 */
1023
1024 switch (adapter->hw.mac_type) {
1025 case e1000_82542_rev2_0:
1026 case e1000_82542_rev2_1:
1027 case e1000_82543:
1028 break;
1029 case e1000_82544:
1030 e1000_read_eeprom(&adapter->hw,
1031 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1032 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1033 break;
1034 case e1000_ich8lan:
1035 e1000_read_eeprom(&adapter->hw,
1036 EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1037 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1038 break;
1039 case e1000_82546:
1040 case e1000_82546_rev_3:
1041 case e1000_82571:
1042 case e1000_80003es2lan:
1043 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1044 e1000_read_eeprom(&adapter->hw,
1045 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1046 break;
1047 }
1048 /* Fall Through */
1049 default:
1050 e1000_read_eeprom(&adapter->hw,
1051 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1052 break;
1053 }
1054 if (eeprom_data & eeprom_apme_mask)
1055 adapter->eeprom_wol |= E1000_WUFC_MAG;
1056
1057 /* now that we have the eeprom settings, apply the special cases
1058 * where the eeprom may be wrong or the board simply won't support
1059 * wake on lan on a particular port */
1060 switch (pdev->device) {
1061 case E1000_DEV_ID_82546GB_PCIE:
1062 adapter->eeprom_wol = 0;
1063 break;
1064 case E1000_DEV_ID_82546EB_FIBER:
1065 case E1000_DEV_ID_82546GB_FIBER:
1066 case E1000_DEV_ID_82571EB_FIBER:
1067 /* Wake events only supported on port A for dual fiber
1068 * regardless of eeprom setting */
1069 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
1070 adapter->eeprom_wol = 0;
1071 break;
1072 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1073 case E1000_DEV_ID_82571EB_QUAD_COPPER:
1074 case E1000_DEV_ID_82571EB_QUAD_FIBER:
1075 case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1076 case E1000_DEV_ID_82571PT_QUAD_COPPER:
1077 /* if quad port adapter, disable WoL on all but port A */
1078 if (global_quad_port_a != 0)
1079 adapter->eeprom_wol = 0;
1080 else
1081 adapter->quad_port_a = 1;
1082 /* Reset for multiple quad port adapters */
1083 if (++global_quad_port_a == 4)
1084 global_quad_port_a = 0;
1085 break;
1086 }
1087
1088 /* initialize the wol settings based on the eeprom settings */
1089 adapter->wol = adapter->eeprom_wol;
1090
1091 /* print bus type/speed/width info */
1092 {
1093 struct e1000_hw *hw = &adapter->hw;
1094 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1095 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1096 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1097 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1098 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1099 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1100 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1101 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1102 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1103 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1104 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1105 "32-bit"));
1106 }
1107
1108 printk("%s\n", print_mac(mac, netdev->dev_addr));
1109
1110 /* reset the hardware with the new settings */
1111 e1000_reset(adapter);
1112
1113 /* If the controller is 82573 and f/w is AMT, do not set
1114 * DRV_LOAD until the interface is up. For all other cases,
1115 * let the f/w know that the h/w is now under the control
1116 * of the driver. */
1117 if (adapter->hw.mac_type != e1000_82573 ||
1118 !e1000_check_mng_mode(&adapter->hw))
1119 e1000_get_hw_control(adapter);
1120
1121 /* tell the stack to leave us alone until e1000_open() is called */
1122 netif_carrier_off(netdev);
1123 netif_stop_queue(netdev);
1124
1125 strcpy(netdev->name, "eth%d");
1126 if ((err = register_netdev(netdev)))
1127 goto err_register;
1128
1129 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1130
1131 cards_found++;
1132 return 0;
1133
1134 err_register:
1135 e1000_release_hw_control(adapter);
1136 err_eeprom:
1137 if (!e1000_check_phy_reset_block(&adapter->hw))
1138 e1000_phy_hw_reset(&adapter->hw);
1139
1140 if (adapter->hw.flash_address)
1141 iounmap(adapter->hw.flash_address);
1142 err_flashmap:
1143 #ifdef CONFIG_E1000_NAPI
1144 for (i = 0; i < adapter->num_rx_queues; i++)
1145 dev_put(&adapter->polling_netdev[i]);
1146 #endif
1147
1148 kfree(adapter->tx_ring);
1149 kfree(adapter->rx_ring);
1150 #ifdef CONFIG_E1000_NAPI
1151 kfree(adapter->polling_netdev);
1152 #endif
1153 err_sw_init:
1154 iounmap(adapter->hw.hw_addr);
1155 err_ioremap:
1156 free_netdev(netdev);
1157 err_alloc_etherdev:
1158 pci_release_regions(pdev);
1159 err_pci_reg:
1160 err_dma:
1161 pci_disable_device(pdev);
1162 return err;
1163 }
1164
1165 /**
1166 * e1000_remove - Device Removal Routine
1167 * @pdev: PCI device information struct
1168 *
1169 * e1000_remove is called by the PCI subsystem to alert the driver
1170 * that it should release a PCI device. The could be caused by a
1171 * Hot-Plug event, or because the driver is going to be removed from
1172 * memory.
1173 **/
1174
1175 static void __devexit
1176 e1000_remove(struct pci_dev *pdev)
1177 {
1178 struct net_device *netdev = pci_get_drvdata(pdev);
1179 struct e1000_adapter *adapter = netdev_priv(netdev);
1180 #ifdef CONFIG_E1000_NAPI
1181 int i;
1182 #endif
1183
1184 cancel_work_sync(&adapter->reset_task);
1185
1186 e1000_release_manageability(adapter);
1187
1188 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1189 * would have already happened in close and is redundant. */
1190 e1000_release_hw_control(adapter);
1191
1192 #ifdef CONFIG_E1000_NAPI
1193 for (i = 0; i < adapter->num_rx_queues; i++)
1194 dev_put(&adapter->polling_netdev[i]);
1195 #endif
1196
1197 unregister_netdev(netdev);
1198
1199 if (!e1000_check_phy_reset_block(&adapter->hw))
1200 e1000_phy_hw_reset(&adapter->hw);
1201
1202 kfree(adapter->tx_ring);
1203 kfree(adapter->rx_ring);
1204 #ifdef CONFIG_E1000_NAPI
1205 kfree(adapter->polling_netdev);
1206 #endif
1207
1208 iounmap(adapter->hw.hw_addr);
1209 if (adapter->hw.flash_address)
1210 iounmap(adapter->hw.flash_address);
1211 pci_release_regions(pdev);
1212
1213 free_netdev(netdev);
1214
1215 pci_disable_device(pdev);
1216 }
1217
1218 /**
1219 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1220 * @adapter: board private structure to initialize
1221 *
1222 * e1000_sw_init initializes the Adapter private data structure.
1223 * Fields are initialized based on PCI device information and
1224 * OS network device settings (MTU size).
1225 **/
1226
1227 static int __devinit
1228 e1000_sw_init(struct e1000_adapter *adapter)
1229 {
1230 struct e1000_hw *hw = &adapter->hw;
1231 struct net_device *netdev = adapter->netdev;
1232 struct pci_dev *pdev = adapter->pdev;
1233 #ifdef CONFIG_E1000_NAPI
1234 int i;
1235 #endif
1236
1237 /* PCI config space info */
1238
1239 hw->vendor_id = pdev->vendor;
1240 hw->device_id = pdev->device;
1241 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1242 hw->subsystem_id = pdev->subsystem_device;
1243 hw->revision_id = pdev->revision;
1244
1245 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1246
1247 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1248 adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1249 hw->max_frame_size = netdev->mtu +
1250 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1251 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1252
1253 /* identify the MAC */
1254
1255 if (e1000_set_mac_type(hw)) {
1256 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1257 return -EIO;
1258 }
1259
1260 switch (hw->mac_type) {
1261 default:
1262 break;
1263 case e1000_82541:
1264 case e1000_82547:
1265 case e1000_82541_rev_2:
1266 case e1000_82547_rev_2:
1267 hw->phy_init_script = 1;
1268 break;
1269 }
1270
1271 e1000_set_media_type(hw);
1272
1273 hw->wait_autoneg_complete = FALSE;
1274 hw->tbi_compatibility_en = TRUE;
1275 hw->adaptive_ifs = TRUE;
1276
1277 /* Copper options */
1278
1279 if (hw->media_type == e1000_media_type_copper) {
1280 hw->mdix = AUTO_ALL_MODES;
1281 hw->disable_polarity_correction = FALSE;
1282 hw->master_slave = E1000_MASTER_SLAVE;
1283 }
1284
1285 adapter->num_tx_queues = 1;
1286 adapter->num_rx_queues = 1;
1287
1288 if (e1000_alloc_queues(adapter)) {
1289 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1290 return -ENOMEM;
1291 }
1292
1293 #ifdef CONFIG_E1000_NAPI
1294 for (i = 0; i < adapter->num_rx_queues; i++) {
1295 adapter->polling_netdev[i].priv = adapter;
1296 dev_hold(&adapter->polling_netdev[i]);
1297 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1298 }
1299 spin_lock_init(&adapter->tx_queue_lock);
1300 #endif
1301
1302 /* Explicitly disable IRQ since the NIC can be in any state. */
1303 atomic_set(&adapter->irq_sem, 0);
1304 e1000_irq_disable(adapter);
1305
1306 spin_lock_init(&adapter->stats_lock);
1307
1308 set_bit(__E1000_DOWN, &adapter->flags);
1309
1310 return 0;
1311 }
1312
1313 /**
1314 * e1000_alloc_queues - Allocate memory for all rings
1315 * @adapter: board private structure to initialize
1316 *
1317 * We allocate one ring per queue at run-time since we don't know the
1318 * number of queues at compile-time. The polling_netdev array is
1319 * intended for Multiqueue, but should work fine with a single queue.
1320 **/
1321
1322 static int __devinit
1323 e1000_alloc_queues(struct e1000_adapter *adapter)
1324 {
1325 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1326 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1327 if (!adapter->tx_ring)
1328 return -ENOMEM;
1329
1330 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1331 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1332 if (!adapter->rx_ring) {
1333 kfree(adapter->tx_ring);
1334 return -ENOMEM;
1335 }
1336
1337 #ifdef CONFIG_E1000_NAPI
1338 adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1339 sizeof(struct net_device),
1340 GFP_KERNEL);
1341 if (!adapter->polling_netdev) {
1342 kfree(adapter->tx_ring);
1343 kfree(adapter->rx_ring);
1344 return -ENOMEM;
1345 }
1346 #endif
1347
1348 return E1000_SUCCESS;
1349 }
1350
1351 /**
1352 * e1000_open - Called when a network interface is made active
1353 * @netdev: network interface device structure
1354 *
1355 * Returns 0 on success, negative value on failure
1356 *
1357 * The open entry point is called when a network interface is made
1358 * active by the system (IFF_UP). At this point all resources needed
1359 * for transmit and receive operations are allocated, the interrupt
1360 * handler is registered with the OS, the watchdog timer is started,
1361 * and the stack is notified that the interface is ready.
1362 **/
1363
1364 static int
1365 e1000_open(struct net_device *netdev)
1366 {
1367 struct e1000_adapter *adapter = netdev_priv(netdev);
1368 int err;
1369
1370 /* disallow open during test */
1371 if (test_bit(__E1000_TESTING, &adapter->flags))
1372 return -EBUSY;
1373
1374 /* allocate transmit descriptors */
1375 err = e1000_setup_all_tx_resources(adapter);
1376 if (err)
1377 goto err_setup_tx;
1378
1379 /* allocate receive descriptors */
1380 err = e1000_setup_all_rx_resources(adapter);
1381 if (err)
1382 goto err_setup_rx;
1383
1384 e1000_power_up_phy(adapter);
1385
1386 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1387 if ((adapter->hw.mng_cookie.status &
1388 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1389 e1000_update_mng_vlan(adapter);
1390 }
1391
1392 /* If AMT is enabled, let the firmware know that the network
1393 * interface is now open */
1394 if (adapter->hw.mac_type == e1000_82573 &&
1395 e1000_check_mng_mode(&adapter->hw))
1396 e1000_get_hw_control(adapter);
1397
1398 /* before we allocate an interrupt, we must be ready to handle it.
1399 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1400 * as soon as we call pci_request_irq, so we have to setup our
1401 * clean_rx handler before we do so. */
1402 e1000_configure(adapter);
1403
1404 err = e1000_request_irq(adapter);
1405 if (err)
1406 goto err_req_irq;
1407
1408 /* From here on the code is the same as e1000_up() */
1409 clear_bit(__E1000_DOWN, &adapter->flags);
1410
1411 #ifdef CONFIG_E1000_NAPI
1412 napi_enable(&adapter->napi);
1413 #endif
1414
1415 e1000_irq_enable(adapter);
1416
1417 /* fire a link status change interrupt to start the watchdog */
1418 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
1419
1420 return E1000_SUCCESS;
1421
1422 err_req_irq:
1423 e1000_release_hw_control(adapter);
1424 e1000_power_down_phy(adapter);
1425 e1000_free_all_rx_resources(adapter);
1426 err_setup_rx:
1427 e1000_free_all_tx_resources(adapter);
1428 err_setup_tx:
1429 e1000_reset(adapter);
1430
1431 return err;
1432 }
1433
1434 /**
1435 * e1000_close - Disables a network interface
1436 * @netdev: network interface device structure
1437 *
1438 * Returns 0, this is not allowed to fail
1439 *
1440 * The close entry point is called when an interface is de-activated
1441 * by the OS. The hardware is still under the drivers control, but
1442 * needs to be disabled. A global MAC reset is issued to stop the
1443 * hardware, and all transmit and receive resources are freed.
1444 **/
1445
1446 static int
1447 e1000_close(struct net_device *netdev)
1448 {
1449 struct e1000_adapter *adapter = netdev_priv(netdev);
1450
1451 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1452 e1000_down(adapter);
1453 e1000_power_down_phy(adapter);
1454 e1000_free_irq(adapter);
1455
1456 e1000_free_all_tx_resources(adapter);
1457 e1000_free_all_rx_resources(adapter);
1458
1459 /* kill manageability vlan ID if supported, but not if a vlan with
1460 * the same ID is registered on the host OS (let 8021q kill it) */
1461 if ((adapter->hw.mng_cookie.status &
1462 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1463 !(adapter->vlgrp &&
1464 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1465 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1466 }
1467
1468 /* If AMT is enabled, let the firmware know that the network
1469 * interface is now closed */
1470 if (adapter->hw.mac_type == e1000_82573 &&
1471 e1000_check_mng_mode(&adapter->hw))
1472 e1000_release_hw_control(adapter);
1473
1474 return 0;
1475 }
1476
1477 /**
1478 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1479 * @adapter: address of board private structure
1480 * @start: address of beginning of memory
1481 * @len: length of memory
1482 **/
1483 static boolean_t
1484 e1000_check_64k_bound(struct e1000_adapter *adapter,
1485 void *start, unsigned long len)
1486 {
1487 unsigned long begin = (unsigned long) start;
1488 unsigned long end = begin + len;
1489
1490 /* First rev 82545 and 82546 need to not allow any memory
1491 * write location to cross 64k boundary due to errata 23 */
1492 if (adapter->hw.mac_type == e1000_82545 ||
1493 adapter->hw.mac_type == e1000_82546) {
1494 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1495 }
1496
1497 return TRUE;
1498 }
1499
1500 /**
1501 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1502 * @adapter: board private structure
1503 * @txdr: tx descriptor ring (for a specific queue) to setup
1504 *
1505 * Return 0 on success, negative on failure
1506 **/
1507
1508 static int
1509 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1510 struct e1000_tx_ring *txdr)
1511 {
1512 struct pci_dev *pdev = adapter->pdev;
1513 int size;
1514
1515 size = sizeof(struct e1000_buffer) * txdr->count;
1516 txdr->buffer_info = vmalloc(size);
1517 if (!txdr->buffer_info) {
1518 DPRINTK(PROBE, ERR,
1519 "Unable to allocate memory for the transmit descriptor ring\n");
1520 return -ENOMEM;
1521 }
1522 memset(txdr->buffer_info, 0, size);
1523
1524 /* round up to nearest 4K */
1525
1526 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1527 txdr->size = ALIGN(txdr->size, 4096);
1528
1529 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1530 if (!txdr->desc) {
1531 setup_tx_desc_die:
1532 vfree(txdr->buffer_info);
1533 DPRINTK(PROBE, ERR,
1534 "Unable to allocate memory for the transmit descriptor ring\n");
1535 return -ENOMEM;
1536 }
1537
1538 /* Fix for errata 23, can't cross 64kB boundary */
1539 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1540 void *olddesc = txdr->desc;
1541 dma_addr_t olddma = txdr->dma;
1542 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1543 "at %p\n", txdr->size, txdr->desc);
1544 /* Try again, without freeing the previous */
1545 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1546 /* Failed allocation, critical failure */
1547 if (!txdr->desc) {
1548 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1549 goto setup_tx_desc_die;
1550 }
1551
1552 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1553 /* give up */
1554 pci_free_consistent(pdev, txdr->size, txdr->desc,
1555 txdr->dma);
1556 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1557 DPRINTK(PROBE, ERR,
1558 "Unable to allocate aligned memory "
1559 "for the transmit descriptor ring\n");
1560 vfree(txdr->buffer_info);
1561 return -ENOMEM;
1562 } else {
1563 /* Free old allocation, new allocation was successful */
1564 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1565 }
1566 }
1567 memset(txdr->desc, 0, txdr->size);
1568
1569 txdr->next_to_use = 0;
1570 txdr->next_to_clean = 0;
1571 spin_lock_init(&txdr->tx_lock);
1572
1573 return 0;
1574 }
1575
1576 /**
1577 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1578 * (Descriptors) for all queues
1579 * @adapter: board private structure
1580 *
1581 * Return 0 on success, negative on failure
1582 **/
1583
1584 int
1585 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1586 {
1587 int i, err = 0;
1588
1589 for (i = 0; i < adapter->num_tx_queues; i++) {
1590 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1591 if (err) {
1592 DPRINTK(PROBE, ERR,
1593 "Allocation for Tx Queue %u failed\n", i);
1594 for (i-- ; i >= 0; i--)
1595 e1000_free_tx_resources(adapter,
1596 &adapter->tx_ring[i]);
1597 break;
1598 }
1599 }
1600
1601 return err;
1602 }
1603
1604 /**
1605 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1606 * @adapter: board private structure
1607 *
1608 * Configure the Tx unit of the MAC after a reset.
1609 **/
1610
1611 static void
1612 e1000_configure_tx(struct e1000_adapter *adapter)
1613 {
1614 uint64_t tdba;
1615 struct e1000_hw *hw = &adapter->hw;
1616 uint32_t tdlen, tctl, tipg, tarc;
1617 uint32_t ipgr1, ipgr2;
1618
1619 /* Setup the HW Tx Head and Tail descriptor pointers */
1620
1621 switch (adapter->num_tx_queues) {
1622 case 1:
1623 default:
1624 tdba = adapter->tx_ring[0].dma;
1625 tdlen = adapter->tx_ring[0].count *
1626 sizeof(struct e1000_tx_desc);
1627 E1000_WRITE_REG(hw, TDLEN, tdlen);
1628 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1629 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1630 E1000_WRITE_REG(hw, TDT, 0);
1631 E1000_WRITE_REG(hw, TDH, 0);
1632 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1633 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1634 break;
1635 }
1636
1637 /* Set the default values for the Tx Inter Packet Gap timer */
1638 if (adapter->hw.mac_type <= e1000_82547_rev_2 &&
1639 (hw->media_type == e1000_media_type_fiber ||
1640 hw->media_type == e1000_media_type_internal_serdes))
1641 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1642 else
1643 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1644
1645 switch (hw->mac_type) {
1646 case e1000_82542_rev2_0:
1647 case e1000_82542_rev2_1:
1648 tipg = DEFAULT_82542_TIPG_IPGT;
1649 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1650 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1651 break;
1652 case e1000_80003es2lan:
1653 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1654 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1655 break;
1656 default:
1657 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1658 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1659 break;
1660 }
1661 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1662 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1663 E1000_WRITE_REG(hw, TIPG, tipg);
1664
1665 /* Set the Tx Interrupt Delay register */
1666
1667 E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1668 if (hw->mac_type >= e1000_82540)
1669 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1670
1671 /* Program the Transmit Control Register */
1672
1673 tctl = E1000_READ_REG(hw, TCTL);
1674 tctl &= ~E1000_TCTL_CT;
1675 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1676 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1677
1678 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1679 tarc = E1000_READ_REG(hw, TARC0);
1680 /* set the speed mode bit, we'll clear it if we're not at
1681 * gigabit link later */
1682 tarc |= (1 << 21);
1683 E1000_WRITE_REG(hw, TARC0, tarc);
1684 } else if (hw->mac_type == e1000_80003es2lan) {
1685 tarc = E1000_READ_REG(hw, TARC0);
1686 tarc |= 1;
1687 E1000_WRITE_REG(hw, TARC0, tarc);
1688 tarc = E1000_READ_REG(hw, TARC1);
1689 tarc |= 1;
1690 E1000_WRITE_REG(hw, TARC1, tarc);
1691 }
1692
1693 e1000_config_collision_dist(hw);
1694
1695 /* Setup Transmit Descriptor Settings for eop descriptor */
1696 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1697
1698 /* only set IDE if we are delaying interrupts using the timers */
1699 if (adapter->tx_int_delay)
1700 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1701
1702 if (hw->mac_type < e1000_82543)
1703 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1704 else
1705 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1706
1707 /* Cache if we're 82544 running in PCI-X because we'll
1708 * need this to apply a workaround later in the send path. */
1709 if (hw->mac_type == e1000_82544 &&
1710 hw->bus_type == e1000_bus_type_pcix)
1711 adapter->pcix_82544 = 1;
1712
1713 E1000_WRITE_REG(hw, TCTL, tctl);
1714
1715 }
1716
1717 /**
1718 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1719 * @adapter: board private structure
1720 * @rxdr: rx descriptor ring (for a specific queue) to setup
1721 *
1722 * Returns 0 on success, negative on failure
1723 **/
1724
1725 static int
1726 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1727 struct e1000_rx_ring *rxdr)
1728 {
1729 struct pci_dev *pdev = adapter->pdev;
1730 int size, desc_len;
1731
1732 size = sizeof(struct e1000_buffer) * rxdr->count;
1733 rxdr->buffer_info = vmalloc(size);
1734 if (!rxdr->buffer_info) {
1735 DPRINTK(PROBE, ERR,
1736 "Unable to allocate memory for the receive descriptor ring\n");
1737 return -ENOMEM;
1738 }
1739 memset(rxdr->buffer_info, 0, size);
1740
1741 rxdr->ps_page = kcalloc(rxdr->count, sizeof(struct e1000_ps_page),
1742 GFP_KERNEL);
1743 if (!rxdr->ps_page) {
1744 vfree(rxdr->buffer_info);
1745 DPRINTK(PROBE, ERR,
1746 "Unable to allocate memory for the receive descriptor ring\n");
1747 return -ENOMEM;
1748 }
1749
1750 rxdr->ps_page_dma = kcalloc(rxdr->count,
1751 sizeof(struct e1000_ps_page_dma),
1752 GFP_KERNEL);
1753 if (!rxdr->ps_page_dma) {
1754 vfree(rxdr->buffer_info);
1755 kfree(rxdr->ps_page);
1756 DPRINTK(PROBE, ERR,
1757 "Unable to allocate memory for the receive descriptor ring\n");
1758 return -ENOMEM;
1759 }
1760
1761 if (adapter->hw.mac_type <= e1000_82547_rev_2)
1762 desc_len = sizeof(struct e1000_rx_desc);
1763 else
1764 desc_len = sizeof(union e1000_rx_desc_packet_split);
1765
1766 /* Round up to nearest 4K */
1767
1768 rxdr->size = rxdr->count * desc_len;
1769 rxdr->size = ALIGN(rxdr->size, 4096);
1770
1771 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1772
1773 if (!rxdr->desc) {
1774 DPRINTK(PROBE, ERR,
1775 "Unable to allocate memory for the receive descriptor ring\n");
1776 setup_rx_desc_die:
1777 vfree(rxdr->buffer_info);
1778 kfree(rxdr->ps_page);
1779 kfree(rxdr->ps_page_dma);
1780 return -ENOMEM;
1781 }
1782
1783 /* Fix for errata 23, can't cross 64kB boundary */
1784 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1785 void *olddesc = rxdr->desc;
1786 dma_addr_t olddma = rxdr->dma;
1787 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1788 "at %p\n", rxdr->size, rxdr->desc);
1789 /* Try again, without freeing the previous */
1790 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1791 /* Failed allocation, critical failure */
1792 if (!rxdr->desc) {
1793 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1794 DPRINTK(PROBE, ERR,
1795 "Unable to allocate memory "
1796 "for the receive descriptor ring\n");
1797 goto setup_rx_desc_die;
1798 }
1799
1800 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1801 /* give up */
1802 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1803 rxdr->dma);
1804 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1805 DPRINTK(PROBE, ERR,
1806 "Unable to allocate aligned memory "
1807 "for the receive descriptor ring\n");
1808 goto setup_rx_desc_die;
1809 } else {
1810 /* Free old allocation, new allocation was successful */
1811 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1812 }
1813 }
1814 memset(rxdr->desc, 0, rxdr->size);
1815
1816 rxdr->next_to_clean = 0;
1817 rxdr->next_to_use = 0;
1818
1819 return 0;
1820 }
1821
1822 /**
1823 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1824 * (Descriptors) for all queues
1825 * @adapter: board private structure
1826 *
1827 * Return 0 on success, negative on failure
1828 **/
1829
1830 int
1831 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1832 {
1833 int i, err = 0;
1834
1835 for (i = 0; i < adapter->num_rx_queues; i++) {
1836 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1837 if (err) {
1838 DPRINTK(PROBE, ERR,
1839 "Allocation for Rx Queue %u failed\n", i);
1840 for (i-- ; i >= 0; i--)
1841 e1000_free_rx_resources(adapter,
1842 &adapter->rx_ring[i]);
1843 break;
1844 }
1845 }
1846
1847 return err;
1848 }
1849
1850 /**
1851 * e1000_setup_rctl - configure the receive control registers
1852 * @adapter: Board private structure
1853 **/
1854 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1855 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1856 static void
1857 e1000_setup_rctl(struct e1000_adapter *adapter)
1858 {
1859 uint32_t rctl, rfctl;
1860 uint32_t psrctl = 0;
1861 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1862 uint32_t pages = 0;
1863 #endif
1864
1865 rctl = E1000_READ_REG(&adapter->hw, RCTL);
1866
1867 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1868
1869 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1870 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1871 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1872
1873 if (adapter->hw.tbi_compatibility_on == 1)
1874 rctl |= E1000_RCTL_SBP;
1875 else
1876 rctl &= ~E1000_RCTL_SBP;
1877
1878 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1879 rctl &= ~E1000_RCTL_LPE;
1880 else
1881 rctl |= E1000_RCTL_LPE;
1882
1883 /* Setup buffer sizes */
1884 rctl &= ~E1000_RCTL_SZ_4096;
1885 rctl |= E1000_RCTL_BSEX;
1886 switch (adapter->rx_buffer_len) {
1887 case E1000_RXBUFFER_256:
1888 rctl |= E1000_RCTL_SZ_256;
1889 rctl &= ~E1000_RCTL_BSEX;
1890 break;
1891 case E1000_RXBUFFER_512:
1892 rctl |= E1000_RCTL_SZ_512;
1893 rctl &= ~E1000_RCTL_BSEX;
1894 break;
1895 case E1000_RXBUFFER_1024:
1896 rctl |= E1000_RCTL_SZ_1024;
1897 rctl &= ~E1000_RCTL_BSEX;
1898 break;
1899 case E1000_RXBUFFER_2048:
1900 default:
1901 rctl |= E1000_RCTL_SZ_2048;
1902 rctl &= ~E1000_RCTL_BSEX;
1903 break;
1904 case E1000_RXBUFFER_4096:
1905 rctl |= E1000_RCTL_SZ_4096;
1906 break;
1907 case E1000_RXBUFFER_8192:
1908 rctl |= E1000_RCTL_SZ_8192;
1909 break;
1910 case E1000_RXBUFFER_16384:
1911 rctl |= E1000_RCTL_SZ_16384;
1912 break;
1913 }
1914
1915 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1916 /* 82571 and greater support packet-split where the protocol
1917 * header is placed in skb->data and the packet data is
1918 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1919 * In the case of a non-split, skb->data is linearly filled,
1920 * followed by the page buffers. Therefore, skb->data is
1921 * sized to hold the largest protocol header.
1922 */
1923 /* allocations using alloc_page take too long for regular MTU
1924 * so only enable packet split for jumbo frames */
1925 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1926 if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
1927 PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
1928 adapter->rx_ps_pages = pages;
1929 else
1930 adapter->rx_ps_pages = 0;
1931 #endif
1932 if (adapter->rx_ps_pages) {
1933 /* Configure extra packet-split registers */
1934 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1935 rfctl |= E1000_RFCTL_EXTEN;
1936 /* disable packet split support for IPv6 extension headers,
1937 * because some malformed IPv6 headers can hang the RX */
1938 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
1939 E1000_RFCTL_NEW_IPV6_EXT_DIS);
1940
1941 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1942
1943 rctl |= E1000_RCTL_DTYP_PS;
1944
1945 psrctl |= adapter->rx_ps_bsize0 >>
1946 E1000_PSRCTL_BSIZE0_SHIFT;
1947
1948 switch (adapter->rx_ps_pages) {
1949 case 3:
1950 psrctl |= PAGE_SIZE <<
1951 E1000_PSRCTL_BSIZE3_SHIFT;
1952 case 2:
1953 psrctl |= PAGE_SIZE <<
1954 E1000_PSRCTL_BSIZE2_SHIFT;
1955 case 1:
1956 psrctl |= PAGE_SIZE >>
1957 E1000_PSRCTL_BSIZE1_SHIFT;
1958 break;
1959 }
1960
1961 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1962 }
1963
1964 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1965 }
1966
1967 /**
1968 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1969 * @adapter: board private structure
1970 *
1971 * Configure the Rx unit of the MAC after a reset.
1972 **/
1973
1974 static void
1975 e1000_configure_rx(struct e1000_adapter *adapter)
1976 {
1977 uint64_t rdba;
1978 struct e1000_hw *hw = &adapter->hw;
1979 uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1980
1981 if (adapter->rx_ps_pages) {
1982 /* this is a 32 byte descriptor */
1983 rdlen = adapter->rx_ring[0].count *
1984 sizeof(union e1000_rx_desc_packet_split);
1985 adapter->clean_rx = e1000_clean_rx_irq_ps;
1986 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1987 } else {
1988 rdlen = adapter->rx_ring[0].count *
1989 sizeof(struct e1000_rx_desc);
1990 adapter->clean_rx = e1000_clean_rx_irq;
1991 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1992 }
1993
1994 /* disable receives while setting up the descriptors */
1995 rctl = E1000_READ_REG(hw, RCTL);
1996 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1997
1998 /* set the Receive Delay Timer Register */
1999 E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
2000
2001 if (hw->mac_type >= e1000_82540) {
2002 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
2003 if (adapter->itr_setting != 0)
2004 E1000_WRITE_REG(hw, ITR,
2005 1000000000 / (adapter->itr * 256));
2006 }
2007
2008 if (hw->mac_type >= e1000_82571) {
2009 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
2010 /* Reset delay timers after every interrupt */
2011 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2012 #ifdef CONFIG_E1000_NAPI
2013 /* Auto-Mask interrupts upon ICR access */
2014 ctrl_ext |= E1000_CTRL_EXT_IAME;
2015 E1000_WRITE_REG(hw, IAM, 0xffffffff);
2016 #endif
2017 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
2018 E1000_WRITE_FLUSH(hw);
2019 }
2020
2021 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2022 * the Base and Length of the Rx Descriptor Ring */
2023 switch (adapter->num_rx_queues) {
2024 case 1:
2025 default:
2026 rdba = adapter->rx_ring[0].dma;
2027 E1000_WRITE_REG(hw, RDLEN, rdlen);
2028 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
2029 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
2030 E1000_WRITE_REG(hw, RDT, 0);
2031 E1000_WRITE_REG(hw, RDH, 0);
2032 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2033 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2034 break;
2035 }
2036
2037 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2038 if (hw->mac_type >= e1000_82543) {
2039 rxcsum = E1000_READ_REG(hw, RXCSUM);
2040 if (adapter->rx_csum == TRUE) {
2041 rxcsum |= E1000_RXCSUM_TUOFL;
2042
2043 /* Enable 82571 IPv4 payload checksum for UDP fragments
2044 * Must be used in conjunction with packet-split. */
2045 if ((hw->mac_type >= e1000_82571) &&
2046 (adapter->rx_ps_pages)) {
2047 rxcsum |= E1000_RXCSUM_IPPCSE;
2048 }
2049 } else {
2050 rxcsum &= ~E1000_RXCSUM_TUOFL;
2051 /* don't need to clear IPPCSE as it defaults to 0 */
2052 }
2053 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
2054 }
2055
2056 /* enable early receives on 82573, only takes effect if using > 2048
2057 * byte total frame size. for example only for jumbo frames */
2058 #define E1000_ERT_2048 0x100
2059 if (hw->mac_type == e1000_82573)
2060 E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
2061
2062 /* Enable Receives */
2063 E1000_WRITE_REG(hw, RCTL, rctl);
2064 }
2065
2066 /**
2067 * e1000_free_tx_resources - Free Tx Resources per Queue
2068 * @adapter: board private structure
2069 * @tx_ring: Tx descriptor ring for a specific queue
2070 *
2071 * Free all transmit software resources
2072 **/
2073
2074 static void
2075 e1000_free_tx_resources(struct e1000_adapter *adapter,
2076 struct e1000_tx_ring *tx_ring)
2077 {
2078 struct pci_dev *pdev = adapter->pdev;
2079
2080 e1000_clean_tx_ring(adapter, tx_ring);
2081
2082 vfree(tx_ring->buffer_info);
2083 tx_ring->buffer_info = NULL;
2084
2085 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2086
2087 tx_ring->desc = NULL;
2088 }
2089
2090 /**
2091 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2092 * @adapter: board private structure
2093 *
2094 * Free all transmit software resources
2095 **/
2096
2097 void
2098 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2099 {
2100 int i;
2101
2102 for (i = 0; i < adapter->num_tx_queues; i++)
2103 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2104 }
2105
2106 static void
2107 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2108 struct e1000_buffer *buffer_info)
2109 {
2110 if (buffer_info->dma) {
2111 pci_unmap_page(adapter->pdev,
2112 buffer_info->dma,
2113 buffer_info->length,
2114 PCI_DMA_TODEVICE);
2115 buffer_info->dma = 0;
2116 }
2117 if (buffer_info->skb) {
2118 dev_kfree_skb_any(buffer_info->skb);
2119 buffer_info->skb = NULL;
2120 }
2121 /* buffer_info must be completely set up in the transmit path */
2122 }
2123
2124 /**
2125 * e1000_clean_tx_ring - Free Tx Buffers
2126 * @adapter: board private structure
2127 * @tx_ring: ring to be cleaned
2128 **/
2129
2130 static void
2131 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2132 struct e1000_tx_ring *tx_ring)
2133 {
2134 struct e1000_buffer *buffer_info;
2135 unsigned long size;
2136 unsigned int i;
2137
2138 /* Free all the Tx ring sk_buffs */
2139
2140 for (i = 0; i < tx_ring->count; i++) {
2141 buffer_info = &tx_ring->buffer_info[i];
2142 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2143 }
2144
2145 size = sizeof(struct e1000_buffer) * tx_ring->count;
2146 memset(tx_ring->buffer_info, 0, size);
2147
2148 /* Zero out the descriptor ring */
2149
2150 memset(tx_ring->desc, 0, tx_ring->size);
2151
2152 tx_ring->next_to_use = 0;
2153 tx_ring->next_to_clean = 0;
2154 tx_ring->last_tx_tso = 0;
2155
2156 writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2157 writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2158 }
2159
2160 /**
2161 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2162 * @adapter: board private structure
2163 **/
2164
2165 static void
2166 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2167 {
2168 int i;
2169
2170 for (i = 0; i < adapter->num_tx_queues; i++)
2171 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2172 }
2173
2174 /**
2175 * e1000_free_rx_resources - Free Rx Resources
2176 * @adapter: board private structure
2177 * @rx_ring: ring to clean the resources from
2178 *
2179 * Free all receive software resources
2180 **/
2181
2182 static void
2183 e1000_free_rx_resources(struct e1000_adapter *adapter,
2184 struct e1000_rx_ring *rx_ring)
2185 {
2186 struct pci_dev *pdev = adapter->pdev;
2187
2188 e1000_clean_rx_ring(adapter, rx_ring);
2189
2190 vfree(rx_ring->buffer_info);
2191 rx_ring->buffer_info = NULL;
2192 kfree(rx_ring->ps_page);
2193 rx_ring->ps_page = NULL;
2194 kfree(rx_ring->ps_page_dma);
2195 rx_ring->ps_page_dma = NULL;
2196
2197 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2198
2199 rx_ring->desc = NULL;
2200 }
2201
2202 /**
2203 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2204 * @adapter: board private structure
2205 *
2206 * Free all receive software resources
2207 **/
2208
2209 void
2210 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2211 {
2212 int i;
2213
2214 for (i = 0; i < adapter->num_rx_queues; i++)
2215 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2216 }
2217
2218 /**
2219 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2220 * @adapter: board private structure
2221 * @rx_ring: ring to free buffers from
2222 **/
2223
2224 static void
2225 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2226 struct e1000_rx_ring *rx_ring)
2227 {
2228 struct e1000_buffer *buffer_info;
2229 struct e1000_ps_page *ps_page;
2230 struct e1000_ps_page_dma *ps_page_dma;
2231 struct pci_dev *pdev = adapter->pdev;
2232 unsigned long size;
2233 unsigned int i, j;
2234
2235 /* Free all the Rx ring sk_buffs */
2236 for (i = 0; i < rx_ring->count; i++) {
2237 buffer_info = &rx_ring->buffer_info[i];
2238 if (buffer_info->skb) {
2239 pci_unmap_single(pdev,
2240 buffer_info->dma,
2241 buffer_info->length,
2242 PCI_DMA_FROMDEVICE);
2243
2244 dev_kfree_skb(buffer_info->skb);
2245 buffer_info->skb = NULL;
2246 }
2247 ps_page = &rx_ring->ps_page[i];
2248 ps_page_dma = &rx_ring->ps_page_dma[i];
2249 for (j = 0; j < adapter->rx_ps_pages; j++) {
2250 if (!ps_page->ps_page[j]) break;
2251 pci_unmap_page(pdev,
2252 ps_page_dma->ps_page_dma[j],
2253 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2254 ps_page_dma->ps_page_dma[j] = 0;
2255 put_page(ps_page->ps_page[j]);
2256 ps_page->ps_page[j] = NULL;
2257 }
2258 }
2259
2260 size = sizeof(struct e1000_buffer) * rx_ring->count;
2261 memset(rx_ring->buffer_info, 0, size);
2262 size = sizeof(struct e1000_ps_page) * rx_ring->count;
2263 memset(rx_ring->ps_page, 0, size);
2264 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2265 memset(rx_ring->ps_page_dma, 0, size);
2266
2267 /* Zero out the descriptor ring */
2268
2269 memset(rx_ring->desc, 0, rx_ring->size);
2270
2271 rx_ring->next_to_clean = 0;
2272 rx_ring->next_to_use = 0;
2273
2274 writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2275 writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2276 }
2277
2278 /**
2279 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2280 * @adapter: board private structure
2281 **/
2282
2283 static void
2284 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2285 {
2286 int i;
2287
2288 for (i = 0; i < adapter->num_rx_queues; i++)
2289 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2290 }
2291
2292 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2293 * and memory write and invalidate disabled for certain operations
2294 */
2295 static void
2296 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2297 {
2298 struct net_device *netdev = adapter->netdev;
2299 uint32_t rctl;
2300
2301 e1000_pci_clear_mwi(&adapter->hw);
2302
2303 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2304 rctl |= E1000_RCTL_RST;
2305 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2306 E1000_WRITE_FLUSH(&adapter->hw);
2307 mdelay(5);
2308
2309 if (netif_running(netdev))
2310 e1000_clean_all_rx_rings(adapter);
2311 }
2312
2313 static void
2314 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2315 {
2316 struct net_device *netdev = adapter->netdev;
2317 uint32_t rctl;
2318
2319 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2320 rctl &= ~E1000_RCTL_RST;
2321 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2322 E1000_WRITE_FLUSH(&adapter->hw);
2323 mdelay(5);
2324
2325 if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2326 e1000_pci_set_mwi(&adapter->hw);
2327
2328 if (netif_running(netdev)) {
2329 /* No need to loop, because 82542 supports only 1 queue */
2330 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2331 e1000_configure_rx(adapter);
2332 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2333 }
2334 }
2335
2336 /**
2337 * e1000_set_mac - Change the Ethernet Address of the NIC
2338 * @netdev: network interface device structure
2339 * @p: pointer to an address structure
2340 *
2341 * Returns 0 on success, negative on failure
2342 **/
2343
2344 static int
2345 e1000_set_mac(struct net_device *netdev, void *p)
2346 {
2347 struct e1000_adapter *adapter = netdev_priv(netdev);
2348 struct sockaddr *addr = p;
2349
2350 if (!is_valid_ether_addr(addr->sa_data))
2351 return -EADDRNOTAVAIL;
2352
2353 /* 82542 2.0 needs to be in reset to write receive address registers */
2354
2355 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2356 e1000_enter_82542_rst(adapter);
2357
2358 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2359 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2360
2361 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2362
2363 /* With 82571 controllers, LAA may be overwritten (with the default)
2364 * due to controller reset from the other port. */
2365 if (adapter->hw.mac_type == e1000_82571) {
2366 /* activate the work around */
2367 adapter->hw.laa_is_present = 1;
2368
2369 /* Hold a copy of the LAA in RAR[14] This is done so that
2370 * between the time RAR[0] gets clobbered and the time it
2371 * gets fixed (in e1000_watchdog), the actual LAA is in one
2372 * of the RARs and no incoming packets directed to this port
2373 * are dropped. Eventaully the LAA will be in RAR[0] and
2374 * RAR[14] */
2375 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2376 E1000_RAR_ENTRIES - 1);
2377 }
2378
2379 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2380 e1000_leave_82542_rst(adapter);
2381
2382 return 0;
2383 }
2384
2385 /**
2386 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2387 * @netdev: network interface device structure
2388 *
2389 * The set_rx_mode entry point is called whenever the unicast or multicast
2390 * address lists or the network interface flags are updated. This routine is
2391 * responsible for configuring the hardware for proper unicast, multicast,
2392 * promiscuous mode, and all-multi behavior.
2393 **/
2394
2395 static void
2396 e1000_set_rx_mode(struct net_device *netdev)
2397 {
2398 struct e1000_adapter *adapter = netdev_priv(netdev);
2399 struct e1000_hw *hw = &adapter->hw;
2400 struct dev_addr_list *uc_ptr;
2401 struct dev_addr_list *mc_ptr;
2402 uint32_t rctl;
2403 uint32_t hash_value;
2404 int i, rar_entries = E1000_RAR_ENTRIES;
2405 int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2406 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2407 E1000_NUM_MTA_REGISTERS;
2408
2409 if (adapter->hw.mac_type == e1000_ich8lan)
2410 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2411
2412 /* reserve RAR[14] for LAA over-write work-around */
2413 if (adapter->hw.mac_type == e1000_82571)
2414 rar_entries--;
2415
2416 /* Check for Promiscuous and All Multicast modes */
2417
2418 rctl = E1000_READ_REG(hw, RCTL);
2419
2420 if (netdev->flags & IFF_PROMISC) {
2421 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2422 } else if (netdev->flags & IFF_ALLMULTI) {
2423 rctl |= E1000_RCTL_MPE;
2424 } else {
2425 rctl &= ~E1000_RCTL_MPE;
2426 }
2427
2428 uc_ptr = NULL;
2429 if (netdev->uc_count > rar_entries - 1) {
2430 rctl |= E1000_RCTL_UPE;
2431 } else if (!(netdev->flags & IFF_PROMISC)) {
2432 rctl &= ~E1000_RCTL_UPE;
2433 uc_ptr = netdev->uc_list;
2434 }
2435
2436 E1000_WRITE_REG(hw, RCTL, rctl);
2437
2438 /* 82542 2.0 needs to be in reset to write receive address registers */
2439
2440 if (hw->mac_type == e1000_82542_rev2_0)
2441 e1000_enter_82542_rst(adapter);
2442
2443 /* load the first 14 addresses into the exact filters 1-14. Unicast
2444 * addresses take precedence to avoid disabling unicast filtering
2445 * when possible.
2446 *
2447 * RAR 0 is used for the station MAC adddress
2448 * if there are not 14 addresses, go ahead and clear the filters
2449 * -- with 82571 controllers only 0-13 entries are filled here
2450 */
2451 mc_ptr = netdev->mc_list;
2452
2453 for (i = 1; i < rar_entries; i++) {
2454 if (uc_ptr) {
2455 e1000_rar_set(hw, uc_ptr->da_addr, i);
2456 uc_ptr = uc_ptr->next;
2457 } else if (mc_ptr) {
2458 e1000_rar_set(hw, mc_ptr->da_addr, i);
2459 mc_ptr = mc_ptr->next;
2460 } else {
2461 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2462 E1000_WRITE_FLUSH(hw);
2463 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2464 E1000_WRITE_FLUSH(hw);
2465 }
2466 }
2467 WARN_ON(uc_ptr != NULL);
2468
2469 /* clear the old settings from the multicast hash table */
2470
2471 for (i = 0; i < mta_reg_count; i++) {
2472 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2473 E1000_WRITE_FLUSH(hw);
2474 }
2475
2476 /* load any remaining addresses into the hash table */
2477
2478 for (; mc_ptr; mc_ptr = mc_ptr->next) {
2479 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2480 e1000_mta_set(hw, hash_value);
2481 }
2482
2483 if (hw->mac_type == e1000_82542_rev2_0)
2484 e1000_leave_82542_rst(adapter);
2485 }
2486
2487 /* Need to wait a few seconds after link up to get diagnostic information from
2488 * the phy */
2489
2490 static void
2491 e1000_update_phy_info(unsigned long data)
2492 {
2493 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2494 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2495 }
2496
2497 /**
2498 * e1000_82547_tx_fifo_stall - Timer Call-back
2499 * @data: pointer to adapter cast into an unsigned long
2500 **/
2501
2502 static void
2503 e1000_82547_tx_fifo_stall(unsigned long data)
2504 {
2505 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2506 struct net_device *netdev = adapter->netdev;
2507 uint32_t tctl;
2508
2509 if (atomic_read(&adapter->tx_fifo_stall)) {
2510 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2511 E1000_READ_REG(&adapter->hw, TDH)) &&
2512 (E1000_READ_REG(&adapter->hw, TDFT) ==
2513 E1000_READ_REG(&adapter->hw, TDFH)) &&
2514 (E1000_READ_REG(&adapter->hw, TDFTS) ==
2515 E1000_READ_REG(&adapter->hw, TDFHS))) {
2516 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2517 E1000_WRITE_REG(&adapter->hw, TCTL,
2518 tctl & ~E1000_TCTL_EN);
2519 E1000_WRITE_REG(&adapter->hw, TDFT,
2520 adapter->tx_head_addr);
2521 E1000_WRITE_REG(&adapter->hw, TDFH,
2522 adapter->tx_head_addr);
2523 E1000_WRITE_REG(&adapter->hw, TDFTS,
2524 adapter->tx_head_addr);
2525 E1000_WRITE_REG(&adapter->hw, TDFHS,
2526 adapter->tx_head_addr);
2527 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2528 E1000_WRITE_FLUSH(&adapter->hw);
2529
2530 adapter->tx_fifo_head = 0;
2531 atomic_set(&adapter->tx_fifo_stall, 0);
2532 netif_wake_queue(netdev);
2533 } else {
2534 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2535 }
2536 }
2537 }
2538
2539 /**
2540 * e1000_watchdog - Timer Call-back
2541 * @data: pointer to adapter cast into an unsigned long
2542 **/
2543 static void
2544 e1000_watchdog(unsigned long data)
2545 {
2546 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2547 struct net_device *netdev = adapter->netdev;
2548 struct e1000_tx_ring *txdr = adapter->tx_ring;
2549 uint32_t link, tctl;
2550 int32_t ret_val;
2551
2552 ret_val = e1000_check_for_link(&adapter->hw);
2553 if ((ret_val == E1000_ERR_PHY) &&
2554 (adapter->hw.phy_type == e1000_phy_igp_3) &&
2555 (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2556 /* See e1000_kumeran_lock_loss_workaround() */
2557 DPRINTK(LINK, INFO,
2558 "Gigabit has been disabled, downgrading speed\n");
2559 }
2560
2561 if (adapter->hw.mac_type == e1000_82573) {
2562 e1000_enable_tx_pkt_filtering(&adapter->hw);
2563 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2564 e1000_update_mng_vlan(adapter);
2565 }
2566
2567 if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2568 !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2569 link = !adapter->hw.serdes_link_down;
2570 else
2571 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2572
2573 if (link) {
2574 if (!netif_carrier_ok(netdev)) {
2575 uint32_t ctrl;
2576 boolean_t txb2b = 1;
2577 e1000_get_speed_and_duplex(&adapter->hw,
2578 &adapter->link_speed,
2579 &adapter->link_duplex);
2580
2581 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2582 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2583 "Flow Control: %s\n",
2584 adapter->link_speed,
2585 adapter->link_duplex == FULL_DUPLEX ?
2586 "Full Duplex" : "Half Duplex",
2587 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2588 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2589 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2590 E1000_CTRL_TFCE) ? "TX" : "None" )));
2591
2592 /* tweak tx_queue_len according to speed/duplex
2593 * and adjust the timeout factor */
2594 netdev->tx_queue_len = adapter->tx_queue_len;
2595 adapter->tx_timeout_factor = 1;
2596 switch (adapter->link_speed) {
2597 case SPEED_10:
2598 txb2b = 0;
2599 netdev->tx_queue_len = 10;
2600 adapter->tx_timeout_factor = 8;
2601 break;
2602 case SPEED_100:
2603 txb2b = 0;
2604 netdev->tx_queue_len = 100;
2605 /* maybe add some timeout factor ? */
2606 break;
2607 }
2608
2609 if ((adapter->hw.mac_type == e1000_82571 ||
2610 adapter->hw.mac_type == e1000_82572) &&
2611 txb2b == 0) {
2612 uint32_t tarc0;
2613 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2614 tarc0 &= ~(1 << 21);
2615 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2616 }
2617
2618 /* disable TSO for pcie and 10/100 speeds, to avoid
2619 * some hardware issues */
2620 if (!adapter->tso_force &&
2621 adapter->hw.bus_type == e1000_bus_type_pci_express){
2622 switch (adapter->link_speed) {
2623 case SPEED_10:
2624 case SPEED_100:
2625 DPRINTK(PROBE,INFO,
2626 "10/100 speed: disabling TSO\n");
2627 netdev->features &= ~NETIF_F_TSO;
2628 netdev->features &= ~NETIF_F_TSO6;
2629 break;
2630 case SPEED_1000:
2631 netdev->features |= NETIF_F_TSO;
2632 netdev->features |= NETIF_F_TSO6;
2633 break;
2634 default:
2635 /* oops */
2636 break;
2637 }
2638 }
2639
2640 /* enable transmits in the hardware, need to do this
2641 * after setting TARC0 */
2642 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2643 tctl |= E1000_TCTL_EN;
2644 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2645
2646 netif_carrier_on(netdev);
2647 netif_wake_queue(netdev);
2648 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2649 adapter->smartspeed = 0;
2650 } else {
2651 /* make sure the receive unit is started */
2652 if (adapter->hw.rx_needs_kicking) {
2653 struct e1000_hw *hw = &adapter->hw;
2654 uint32_t rctl = E1000_READ_REG(hw, RCTL);
2655 E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
2656 }
2657 }
2658 } else {
2659 if (netif_carrier_ok(netdev)) {
2660 adapter->link_speed = 0;
2661 adapter->link_duplex = 0;
2662 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2663 netif_carrier_off(netdev);
2664 netif_stop_queue(netdev);
2665 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2666
2667 /* 80003ES2LAN workaround--
2668 * For packet buffer work-around on link down event;
2669 * disable receives in the ISR and
2670 * reset device here in the watchdog
2671 */
2672 if (adapter->hw.mac_type == e1000_80003es2lan)
2673 /* reset device */
2674 schedule_work(&adapter->reset_task);
2675 }
2676
2677 e1000_smartspeed(adapter);
2678 }
2679
2680 e1000_update_stats(adapter);
2681
2682 adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2683 adapter->tpt_old = adapter->stats.tpt;
2684 adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2685 adapter->colc_old = adapter->stats.colc;
2686
2687 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2688 adapter->gorcl_old = adapter->stats.gorcl;
2689 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2690 adapter->gotcl_old = adapter->stats.gotcl;
2691
2692 e1000_update_adaptive(&adapter->hw);
2693
2694 if (!netif_carrier_ok(netdev)) {
2695 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2696 /* We've lost link, so the controller stops DMA,
2697 * but we've got queued Tx work that's never going
2698 * to get done, so reset controller to flush Tx.
2699 * (Do the reset outside of interrupt context). */
2700 adapter->tx_timeout_count++;
2701 schedule_work(&adapter->reset_task);
2702 }
2703 }
2704
2705 /* Cause software interrupt to ensure rx ring is cleaned */
2706 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2707
2708 /* Force detection of hung controller every watchdog period */
2709 adapter->detect_tx_hung = TRUE;
2710
2711 /* With 82571 controllers, LAA may be overwritten due to controller
2712 * reset from the other port. Set the appropriate LAA in RAR[0] */
2713 if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2714 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2715
2716 /* Reset the timer */
2717 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2718 }
2719
2720 enum latency_range {
2721 lowest_latency = 0,
2722 low_latency = 1,
2723 bulk_latency = 2,
2724 latency_invalid = 255
2725 };
2726
2727 /**
2728 * e1000_update_itr - update the dynamic ITR value based on statistics
2729 * Stores a new ITR value based on packets and byte
2730 * counts during the last interrupt. The advantage of per interrupt
2731 * computation is faster updates and more accurate ITR for the current
2732 * traffic pattern. Constants in this function were computed
2733 * based on theoretical maximum wire speed and thresholds were set based
2734 * on testing data as well as attempting to minimize response time
2735 * while increasing bulk throughput.
2736 * this functionality is controlled by the InterruptThrottleRate module
2737 * parameter (see e1000_param.c)
2738 * @adapter: pointer to adapter
2739 * @itr_setting: current adapter->itr
2740 * @packets: the number of packets during this measurement interval
2741 * @bytes: the number of bytes during this measurement interval
2742 **/
2743 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2744 uint16_t itr_setting,
2745 int packets,
2746 int bytes)
2747 {
2748 unsigned int retval = itr_setting;
2749 struct e1000_hw *hw = &adapter->hw;
2750
2751 if (unlikely(hw->mac_type < e1000_82540))
2752 goto update_itr_done;
2753
2754 if (packets == 0)
2755 goto update_itr_done;
2756
2757 switch (itr_setting) {
2758 case lowest_latency:
2759 /* jumbo frames get bulk treatment*/
2760 if (bytes/packets > 8000)
2761 retval = bulk_latency;
2762 else if ((packets < 5) && (bytes > 512))
2763 retval = low_latency;
2764 break;
2765 case low_latency: /* 50 usec aka 20000 ints/s */
2766 if (bytes > 10000) {
2767 /* jumbo frames need bulk latency setting */
2768 if (bytes/packets > 8000)
2769 retval = bulk_latency;
2770 else if ((packets < 10) || ((bytes/packets) > 1200))
2771 retval = bulk_latency;
2772 else if ((packets > 35))
2773 retval = lowest_latency;
2774 } else if (bytes/packets > 2000)
2775 retval = bulk_latency;
2776 else if (packets <= 2 && bytes < 512)
2777 retval = lowest_latency;
2778 break;
2779 case bulk_latency: /* 250 usec aka 4000 ints/s */
2780 if (bytes > 25000) {
2781 if (packets > 35)
2782 retval = low_latency;
2783 } else if (bytes < 6000) {
2784 retval = low_latency;
2785 }
2786 break;
2787 }
2788
2789 update_itr_done:
2790 return retval;
2791 }
2792
2793 static void e1000_set_itr(struct e1000_adapter *adapter)
2794 {
2795 struct e1000_hw *hw = &adapter->hw;
2796 uint16_t current_itr;
2797 uint32_t new_itr = adapter->itr;
2798
2799 if (unlikely(hw->mac_type < e1000_82540))
2800 return;
2801
2802 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2803 if (unlikely(adapter->link_speed != SPEED_1000)) {
2804 current_itr = 0;
2805 new_itr = 4000;
2806 goto set_itr_now;
2807 }
2808
2809 adapter->tx_itr = e1000_update_itr(adapter,
2810 adapter->tx_itr,
2811 adapter->total_tx_packets,
2812 adapter->total_tx_bytes);
2813 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2814 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2815 adapter->tx_itr = low_latency;
2816
2817 adapter->rx_itr = e1000_update_itr(adapter,
2818 adapter->rx_itr,
2819 adapter->total_rx_packets,
2820 adapter->total_rx_bytes);
2821 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2822 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2823 adapter->rx_itr = low_latency;
2824
2825 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2826
2827 switch (current_itr) {
2828 /* counts and packets in update_itr are dependent on these numbers */
2829 case lowest_latency:
2830 new_itr = 70000;
2831 break;
2832 case low_latency:
2833 new_itr = 20000; /* aka hwitr = ~200 */
2834 break;
2835 case bulk_latency:
2836 new_itr = 4000;
2837 break;
2838 default:
2839 break;
2840 }
2841
2842 set_itr_now:
2843 if (new_itr != adapter->itr) {
2844 /* this attempts to bias the interrupt rate towards Bulk
2845 * by adding intermediate steps when interrupt rate is
2846 * increasing */
2847 new_itr = new_itr > adapter->itr ?
2848 min(adapter->itr + (new_itr >> 2), new_itr) :
2849 new_itr;
2850 adapter->itr = new_itr;
2851 E1000_WRITE_REG(hw, ITR, 1000000000 / (new_itr * 256));
2852 }
2853
2854 return;
2855 }
2856
2857 #define E1000_TX_FLAGS_CSUM 0x00000001
2858 #define E1000_TX_FLAGS_VLAN 0x00000002
2859 #define E1000_TX_FLAGS_TSO 0x00000004
2860 #define E1000_TX_FLAGS_IPV4 0x00000008
2861 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2862 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2863
2864 static int
2865 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2866 struct sk_buff *skb)
2867 {
2868 struct e1000_context_desc *context_desc;
2869 struct e1000_buffer *buffer_info;
2870 unsigned int i;
2871 uint32_t cmd_length = 0;
2872 uint16_t ipcse = 0, tucse, mss;
2873 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2874 int err;
2875
2876 if (skb_is_gso(skb)) {
2877 if (skb_header_cloned(skb)) {
2878 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2879 if (err)
2880 return err;
2881 }
2882
2883 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2884 mss = skb_shinfo(skb)->gso_size;
2885 if (skb->protocol == htons(ETH_P_IP)) {
2886 struct iphdr *iph = ip_hdr(skb);
2887 iph->tot_len = 0;
2888 iph->check = 0;
2889 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2890 iph->daddr, 0,
2891 IPPROTO_TCP,
2892 0);
2893 cmd_length = E1000_TXD_CMD_IP;
2894 ipcse = skb_transport_offset(skb) - 1;
2895 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2896 ipv6_hdr(skb)->payload_len = 0;
2897 tcp_hdr(skb)->check =
2898 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2899 &ipv6_hdr(skb)->daddr,
2900 0, IPPROTO_TCP, 0);
2901 ipcse = 0;
2902 }
2903 ipcss = skb_network_offset(skb);
2904 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2905 tucss = skb_transport_offset(skb);
2906 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2907 tucse = 0;
2908
2909 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2910 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2911
2912 i = tx_ring->next_to_use;
2913 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2914 buffer_info = &tx_ring->buffer_info[i];
2915
2916 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2917 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2918 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2919 context_desc->upper_setup.tcp_fields.tucss = tucss;
2920 context_desc->upper_setup.tcp_fields.tucso = tucso;
2921 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2922 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2923 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2924 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2925
2926 buffer_info->time_stamp = jiffies;
2927 buffer_info->next_to_watch = i;
2928
2929 if (++i == tx_ring->count) i = 0;
2930 tx_ring->next_to_use = i;
2931
2932 return TRUE;
2933 }
2934 return FALSE;
2935 }
2936
2937 static boolean_t
2938 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2939 struct sk_buff *skb)
2940 {
2941 struct e1000_context_desc *context_desc;
2942 struct e1000_buffer *buffer_info;
2943 unsigned int i;
2944 uint8_t css;
2945
2946 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2947 css = skb_transport_offset(skb);
2948
2949 i = tx_ring->next_to_use;
2950 buffer_info = &tx_ring->buffer_info[i];
2951 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2952
2953 context_desc->lower_setup.ip_config = 0;
2954 context_desc->upper_setup.tcp_fields.tucss = css;
2955 context_desc->upper_setup.tcp_fields.tucso =
2956 css + skb->csum_offset;
2957 context_desc->upper_setup.tcp_fields.tucse = 0;
2958 context_desc->tcp_seg_setup.data = 0;
2959 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2960
2961 buffer_info->time_stamp = jiffies;
2962 buffer_info->next_to_watch = i;
2963
2964 if (unlikely(++i == tx_ring->count)) i = 0;
2965 tx_ring->next_to_use = i;
2966
2967 return TRUE;
2968 }
2969
2970 return FALSE;
2971 }
2972
2973 #define E1000_MAX_TXD_PWR 12
2974 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2975
2976 static int
2977 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2978 struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2979 unsigned int nr_frags, unsigned int mss)
2980 {
2981 struct e1000_buffer *buffer_info;
2982 unsigned int len = skb->len;
2983 unsigned int offset = 0, size, count = 0, i;
2984 unsigned int f;
2985 len -= skb->data_len;
2986
2987 i = tx_ring->next_to_use;
2988
2989 while (len) {
2990 buffer_info = &tx_ring->buffer_info[i];
2991 size = min(len, max_per_txd);
2992 /* Workaround for Controller erratum --
2993 * descriptor for non-tso packet in a linear SKB that follows a
2994 * tso gets written back prematurely before the data is fully
2995 * DMA'd to the controller */
2996 if (!skb->data_len && tx_ring->last_tx_tso &&
2997 !skb_is_gso(skb)) {
2998 tx_ring->last_tx_tso = 0;
2999 size -= 4;
3000 }
3001
3002 /* Workaround for premature desc write-backs
3003 * in TSO mode. Append 4-byte sentinel desc */
3004 if (unlikely(mss && !nr_frags && size == len && size > 8))
3005 size -= 4;
3006 /* work-around for errata 10 and it applies
3007 * to all controllers in PCI-X mode
3008 * The fix is to make sure that the first descriptor of a
3009 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3010 */
3011 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3012 (size > 2015) && count == 0))
3013 size = 2015;
3014
3015 /* Workaround for potential 82544 hang in PCI-X. Avoid
3016 * terminating buffers within evenly-aligned dwords. */
3017 if (unlikely(adapter->pcix_82544 &&
3018 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3019 size > 4))
3020 size -= 4;
3021
3022 buffer_info->length = size;
3023 buffer_info->dma =
3024 pci_map_single(adapter->pdev,
3025 skb->data + offset,
3026 size,
3027 PCI_DMA_TODEVICE);
3028 buffer_info->time_stamp = jiffies;
3029 buffer_info->next_to_watch = i;
3030
3031 len -= size;
3032 offset += size;
3033 count++;
3034 if (unlikely(++i == tx_ring->count)) i = 0;
3035 }
3036
3037 for (f = 0; f < nr_frags; f++) {
3038 struct skb_frag_struct *frag;
3039
3040 frag = &skb_shinfo(skb)->frags[f];
3041 len = frag->size;
3042 offset = frag->page_offset;
3043
3044 while (len) {
3045 buffer_info = &tx_ring->buffer_info[i];
3046 size = min(len, max_per_txd);
3047 /* Workaround for premature desc write-backs
3048 * in TSO mode. Append 4-byte sentinel desc */
3049 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3050 size -= 4;
3051 /* Workaround for potential 82544 hang in PCI-X.
3052 * Avoid terminating buffers within evenly-aligned
3053 * dwords. */
3054 if (unlikely(adapter->pcix_82544 &&
3055 !((unsigned long)(frag->page+offset+size-1) & 4) &&
3056 size > 4))
3057 size -= 4;
3058
3059 buffer_info->length = size;
3060 buffer_info->dma =
3061 pci_map_page(adapter->pdev,
3062 frag->page,
3063 offset,
3064 size,
3065 PCI_DMA_TODEVICE);
3066 buffer_info->time_stamp = jiffies;
3067 buffer_info->next_to_watch = i;
3068
3069 len -= size;
3070 offset += size;
3071 count++;
3072 if (unlikely(++i == tx_ring->count)) i = 0;
3073 }
3074 }
3075
3076 i = (i == 0) ? tx_ring->count - 1 : i - 1;
3077 tx_ring->buffer_info[i].skb = skb;
3078 tx_ring->buffer_info[first].next_to_watch = i;
3079
3080 return count;
3081 }
3082
3083 static void
3084 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3085 int tx_flags, int count)
3086 {
3087 struct e1000_tx_desc *tx_desc = NULL;
3088 struct e1000_buffer *buffer_info;
3089 uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3090 unsigned int i;
3091
3092 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3093 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3094 E1000_TXD_CMD_TSE;
3095 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3096
3097 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3098 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3099 }
3100
3101 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3102 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3103 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3104 }
3105
3106 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3107 txd_lower |= E1000_TXD_CMD_VLE;
3108 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3109 }
3110
3111 i = tx_ring->next_to_use;
3112
3113 while (count--) {
3114 buffer_info = &tx_ring->buffer_info[i];
3115 tx_desc = E1000_TX_DESC(*tx_ring, i);
3116 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3117 tx_desc->lower.data =
3118 cpu_to_le32(txd_lower | buffer_info->length);
3119 tx_desc->upper.data = cpu_to_le32(txd_upper);
3120 if (unlikely(++i == tx_ring->count)) i = 0;
3121 }
3122
3123 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3124
3125 /* Force memory writes to complete before letting h/w
3126 * know there are new descriptors to fetch. (Only
3127 * applicable for weak-ordered memory model archs,
3128 * such as IA-64). */
3129 wmb();
3130
3131 tx_ring->next_to_use = i;
3132 writel(i, adapter->hw.hw_addr + tx_ring->tdt);
3133 /* we need this if more than one processor can write to our tail
3134 * at a time, it syncronizes IO on IA64/Altix systems */
3135 mmiowb();
3136 }
3137
3138 /**
3139 * 82547 workaround to avoid controller hang in half-duplex environment.
3140 * The workaround is to avoid queuing a large packet that would span
3141 * the internal Tx FIFO ring boundary by notifying the stack to resend
3142 * the packet at a later time. This gives the Tx FIFO an opportunity to
3143 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3144 * to the beginning of the Tx FIFO.
3145 **/
3146
3147 #define E1000_FIFO_HDR 0x10
3148 #define E1000_82547_PAD_LEN 0x3E0
3149
3150 static int
3151 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3152 {
3153 uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3154 uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3155
3156 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3157
3158 if (adapter->link_duplex != HALF_DUPLEX)
3159 goto no_fifo_stall_required;
3160
3161 if (atomic_read(&adapter->tx_fifo_stall))
3162 return 1;
3163
3164 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3165 atomic_set(&adapter->tx_fifo_stall, 1);
3166 return 1;
3167 }
3168
3169 no_fifo_stall_required:
3170 adapter->tx_fifo_head += skb_fifo_len;
3171 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3172 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3173 return 0;
3174 }
3175
3176 #define MINIMUM_DHCP_PACKET_SIZE 282
3177 static int
3178 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3179 {
3180 struct e1000_hw *hw = &adapter->hw;
3181 uint16_t length, offset;
3182 if (vlan_tx_tag_present(skb)) {
3183 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
3184 ( adapter->hw.mng_cookie.status &
3185 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3186 return 0;
3187 }
3188 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3189 struct ethhdr *eth = (struct ethhdr *) skb->data;
3190 if ((htons(ETH_P_IP) == eth->h_proto)) {
3191 const struct iphdr *ip =
3192 (struct iphdr *)((uint8_t *)skb->data+14);
3193 if (IPPROTO_UDP == ip->protocol) {
3194 struct udphdr *udp =
3195 (struct udphdr *)((uint8_t *)ip +
3196 (ip->ihl << 2));
3197 if (ntohs(udp->dest) == 67) {
3198 offset = (uint8_t *)udp + 8 - skb->data;
3199 length = skb->len - offset;
3200
3201 return e1000_mng_write_dhcp_info(hw,
3202 (uint8_t *)udp + 8,
3203 length);
3204 }
3205 }
3206 }
3207 }
3208 return 0;
3209 }
3210
3211 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3212 {
3213 struct e1000_adapter *adapter = netdev_priv(netdev);
3214 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3215
3216 netif_stop_queue(netdev);
3217 /* Herbert's original patch had:
3218 * smp_mb__after_netif_stop_queue();
3219 * but since that doesn't exist yet, just open code it. */
3220 smp_mb();
3221
3222 /* We need to check again in a case another CPU has just
3223 * made room available. */
3224 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3225 return -EBUSY;
3226
3227 /* A reprieve! */
3228 netif_start_queue(netdev);
3229 ++adapter->restart_queue;
3230 return 0;
3231 }
3232
3233 static int e1000_maybe_stop_tx(struct net_device *netdev,
3234 struct e1000_tx_ring *tx_ring, int size)
3235 {
3236 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3237 return 0;
3238 return __e1000_maybe_stop_tx(netdev, size);
3239 }
3240
3241 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3242 static int
3243 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3244 {
3245 struct e1000_adapter *adapter = netdev_priv(netdev);
3246 struct e1000_tx_ring *tx_ring;
3247 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3248 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3249 unsigned int tx_flags = 0;
3250 unsigned int len = skb->len - skb->data_len;
3251 unsigned long flags;
3252 unsigned int nr_frags;
3253 unsigned int mss;
3254 int count = 0;
3255 int tso;
3256 unsigned int f;
3257
3258 /* This goes back to the question of how to logically map a tx queue
3259 * to a flow. Right now, performance is impacted slightly negatively
3260 * if using multiple tx queues. If the stack breaks away from a
3261 * single qdisc implementation, we can look at this again. */
3262 tx_ring = adapter->tx_ring;
3263
3264 if (unlikely(skb->len <= 0)) {
3265 dev_kfree_skb_any(skb);
3266 return NETDEV_TX_OK;
3267 }
3268
3269 /* 82571 and newer doesn't need the workaround that limited descriptor
3270 * length to 4kB */
3271 if (adapter->hw.mac_type >= e1000_82571)
3272 max_per_txd = 8192;
3273
3274 mss = skb_shinfo(skb)->gso_size;
3275 /* The controller does a simple calculation to
3276 * make sure there is enough room in the FIFO before
3277 * initiating the DMA for each buffer. The calc is:
3278 * 4 = ceil(buffer len/mss). To make sure we don't
3279 * overrun the FIFO, adjust the max buffer len if mss
3280 * drops. */
3281 if (mss) {
3282 uint8_t hdr_len;
3283 max_per_txd = min(mss << 2, max_per_txd);
3284 max_txd_pwr = fls(max_per_txd) - 1;
3285
3286 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3287 * points to just header, pull a few bytes of payload from
3288 * frags into skb->data */
3289 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3290 if (skb->data_len && hdr_len == len) {
3291 switch (adapter->hw.mac_type) {
3292 unsigned int pull_size;
3293 case e1000_82544:
3294 /* Make sure we have room to chop off 4 bytes,
3295 * and that the end alignment will work out to
3296 * this hardware's requirements
3297 * NOTE: this is a TSO only workaround
3298 * if end byte alignment not correct move us
3299 * into the next dword */
3300 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3301 break;
3302 /* fall through */
3303 case e1000_82571:
3304 case e1000_82572:
3305 case e1000_82573:
3306 case e1000_ich8lan:
3307 pull_size = min((unsigned int)4, skb->data_len);
3308 if (!__pskb_pull_tail(skb, pull_size)) {
3309 DPRINTK(DRV, ERR,
3310 "__pskb_pull_tail failed.\n");
3311 dev_kfree_skb_any(skb);
3312 return NETDEV_TX_OK;
3313 }
3314 len = skb->len - skb->data_len;
3315 break;
3316 default:
3317 /* do nothing */
3318 break;
3319 }
3320 }
3321 }
3322
3323 /* reserve a descriptor for the offload context */
3324 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3325 count++;
3326 count++;
3327
3328 /* Controller Erratum workaround */
3329 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3330 count++;
3331
3332 count += TXD_USE_COUNT(len, max_txd_pwr);
3333
3334 if (adapter->pcix_82544)
3335 count++;
3336
3337 /* work-around for errata 10 and it applies to all controllers
3338 * in PCI-X mode, so add one more descriptor to the count
3339 */
3340 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3341 (len > 2015)))
3342 count++;
3343
3344 nr_frags = skb_shinfo(skb)->nr_frags;
3345 for (f = 0; f < nr_frags; f++)
3346 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3347 max_txd_pwr);
3348 if (adapter->pcix_82544)
3349 count += nr_frags;
3350
3351
3352 if (adapter->hw.tx_pkt_filtering &&
3353 (adapter->hw.mac_type == e1000_82573))
3354 e1000_transfer_dhcp_info(adapter, skb);
3355
3356 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3357 /* Collision - tell upper layer to requeue */
3358 return NETDEV_TX_LOCKED;
3359
3360 /* need: count + 2 desc gap to keep tail from touching
3361 * head, otherwise try next time */
3362 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3363 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3364 return NETDEV_TX_BUSY;
3365 }
3366
3367 if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3368 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3369 netif_stop_queue(netdev);
3370 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3371 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3372 return NETDEV_TX_BUSY;
3373 }
3374 }
3375
3376 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3377 tx_flags |= E1000_TX_FLAGS_VLAN;
3378 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3379 }
3380
3381 first = tx_ring->next_to_use;
3382
3383 tso = e1000_tso(adapter, tx_ring, skb);
3384 if (tso < 0) {
3385 dev_kfree_skb_any(skb);
3386 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3387 return NETDEV_TX_OK;
3388 }
3389
3390 if (likely(tso)) {
3391 tx_ring->last_tx_tso = 1;
3392 tx_flags |= E1000_TX_FLAGS_TSO;
3393 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3394 tx_flags |= E1000_TX_FLAGS_CSUM;
3395
3396 /* Old method was to assume IPv4 packet by default if TSO was enabled.
3397 * 82571 hardware supports TSO capabilities for IPv6 as well...
3398 * no longer assume, we must. */
3399 if (likely(skb->protocol == htons(ETH_P_IP)))
3400 tx_flags |= E1000_TX_FLAGS_IPV4;
3401
3402 e1000_tx_queue(adapter, tx_ring, tx_flags,
3403 e1000_tx_map(adapter, tx_ring, skb, first,
3404 max_per_txd, nr_frags, mss));
3405
3406 netdev->trans_start = jiffies;
3407
3408 /* Make sure there is space in the ring for the next send. */
3409 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3410
3411 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3412 return NETDEV_TX_OK;
3413 }
3414
3415 /**
3416 * e1000_tx_timeout - Respond to a Tx Hang
3417 * @netdev: network interface device structure
3418 **/
3419
3420 static void
3421 e1000_tx_timeout(struct net_device *netdev)
3422 {
3423 struct e1000_adapter *adapter = netdev_priv(netdev);
3424
3425 /* Do the reset outside of interrupt context */
3426 adapter->tx_timeout_count++;
3427 schedule_work(&adapter->reset_task);
3428 }
3429
3430 static void
3431 e1000_reset_task(struct work_struct *work)
3432 {
3433 struct e1000_adapter *adapter =
3434 container_of(work, struct e1000_adapter, reset_task);
3435
3436 e1000_reinit_locked(adapter);
3437 }
3438
3439 /**
3440 * e1000_get_stats - Get System Network Statistics
3441 * @netdev: network interface device structure
3442 *
3443 * Returns the address of the device statistics structure.
3444 * The statistics are actually updated from the timer callback.
3445 **/
3446
3447 static struct net_device_stats *
3448 e1000_get_stats(struct net_device *netdev)
3449 {
3450 struct e1000_adapter *adapter = netdev_priv(netdev);
3451
3452 /* only return the current stats */
3453 return &adapter->net_stats;
3454 }
3455
3456 /**
3457 * e1000_change_mtu - Change the Maximum Transfer Unit
3458 * @netdev: network interface device structure
3459 * @new_mtu: new value for maximum frame size
3460 *
3461 * Returns 0 on success, negative on failure
3462 **/
3463
3464 static int
3465 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3466 {
3467 struct e1000_adapter *adapter = netdev_priv(netdev);
3468 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3469 uint16_t eeprom_data = 0;
3470
3471 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3472 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3473 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3474 return -EINVAL;
3475 }
3476
3477 /* Adapter-specific max frame size limits. */
3478 switch (adapter->hw.mac_type) {
3479 case e1000_undefined ... e1000_82542_rev2_1:
3480 case e1000_ich8lan:
3481 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3482 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3483 return -EINVAL;
3484 }
3485 break;
3486 case e1000_82573:
3487 /* Jumbo Frames not supported if:
3488 * - this is not an 82573L device
3489 * - ASPM is enabled in any way (0x1A bits 3:2) */
3490 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3491 &eeprom_data);
3492 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3493 (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3494 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3495 DPRINTK(PROBE, ERR,
3496 "Jumbo Frames not supported.\n");
3497 return -EINVAL;
3498 }
3499 break;
3500 }
3501 /* ERT will be enabled later to enable wire speed receives */
3502
3503 /* fall through to get support */
3504 case e1000_82571:
3505 case e1000_82572:
3506 case e1000_80003es2lan:
3507 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3508 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3509 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3510 return -EINVAL;
3511 }
3512 break;
3513 default:
3514 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3515 break;
3516 }
3517
3518 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3519 * means we reserve 2 more, this pushes us to allocate from the next
3520 * larger slab size
3521 * i.e. RXBUFFER_2048 --> size-4096 slab */
3522
3523 if (max_frame <= E1000_RXBUFFER_256)
3524 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3525 else if (max_frame <= E1000_RXBUFFER_512)
3526 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3527 else if (max_frame <= E1000_RXBUFFER_1024)
3528 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3529 else if (max_frame <= E1000_RXBUFFER_2048)
3530 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3531 else if (max_frame <= E1000_RXBUFFER_4096)
3532 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3533 else if (max_frame <= E1000_RXBUFFER_8192)
3534 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3535 else if (max_frame <= E1000_RXBUFFER_16384)
3536 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3537
3538 /* adjust allocation if LPE protects us, and we aren't using SBP */
3539 if (!adapter->hw.tbi_compatibility_on &&
3540 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3541 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3542 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3543
3544 netdev->mtu = new_mtu;
3545 adapter->hw.max_frame_size = max_frame;
3546
3547 if (netif_running(netdev))
3548 e1000_reinit_locked(adapter);
3549
3550 return 0;
3551 }
3552
3553 /**
3554 * e1000_update_stats - Update the board statistics counters
3555 * @adapter: board private structure
3556 **/
3557
3558 void
3559 e1000_update_stats(struct e1000_adapter *adapter)
3560 {
3561 struct e1000_hw *hw = &adapter->hw;
3562 struct pci_dev *pdev = adapter->pdev;
3563 unsigned long flags;
3564 uint16_t phy_tmp;
3565
3566 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3567
3568 /*
3569 * Prevent stats update while adapter is being reset, or if the pci
3570 * connection is down.
3571 */
3572 if (adapter->link_speed == 0)
3573 return;
3574 if (pci_channel_offline(pdev))
3575 return;
3576
3577 spin_lock_irqsave(&adapter->stats_lock, flags);
3578
3579 /* these counters are modified from e1000_tbi_adjust_stats,
3580 * called from the interrupt context, so they must only
3581 * be written while holding adapter->stats_lock
3582 */
3583
3584 adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3585 adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3586 adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3587 adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3588 adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3589 adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3590 adapter->stats.roc += E1000_READ_REG(hw, ROC);
3591
3592 if (adapter->hw.mac_type != e1000_ich8lan) {
3593 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3594 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3595 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3596 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3597 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3598 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3599 }
3600
3601 adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3602 adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3603 adapter->stats.scc += E1000_READ_REG(hw, SCC);
3604 adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3605 adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3606 adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3607 adapter->stats.dc += E1000_READ_REG(hw, DC);
3608 adapter->stats.sec += E1000_READ_REG(hw, SEC);
3609 adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3610 adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3611 adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3612 adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3613 adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3614 adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3615 adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3616 adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3617 adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3618 adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3619 adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3620 adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3621 adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3622 adapter->stats.torl += E1000_READ_REG(hw, TORL);
3623 adapter->stats.torh += E1000_READ_REG(hw, TORH);
3624 adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3625 adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3626 adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3627
3628 if (adapter->hw.mac_type != e1000_ich8lan) {
3629 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3630 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3631 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3632 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3633 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3634 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3635 }
3636
3637 adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3638 adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3639
3640 /* used for adaptive IFS */
3641
3642 hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3643 adapter->stats.tpt += hw->tx_packet_delta;
3644 hw->collision_delta = E1000_READ_REG(hw, COLC);
3645 adapter->stats.colc += hw->collision_delta;
3646
3647 if (hw->mac_type >= e1000_82543) {
3648 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3649 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3650 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3651 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3652 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3653 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3654 }
3655 if (hw->mac_type > e1000_82547_rev_2) {
3656 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3657 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3658
3659 if (adapter->hw.mac_type != e1000_ich8lan) {
3660 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3661 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3662 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3663 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3664 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3665 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3666 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3667 }
3668 }
3669
3670 /* Fill out the OS statistics structure */
3671 adapter->net_stats.multicast = adapter->stats.mprc;
3672 adapter->net_stats.collisions = adapter->stats.colc;
3673
3674 /* Rx Errors */
3675
3676 /* RLEC on some newer hardware can be incorrect so build
3677 * our own version based on RUC and ROC */
3678 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3679 adapter->stats.crcerrs + adapter->stats.algnerrc +
3680 adapter->stats.ruc + adapter->stats.roc +
3681 adapter->stats.cexterr;
3682 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3683 adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3684 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3685 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3686 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3687
3688 /* Tx Errors */
3689 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3690 adapter->net_stats.tx_errors = adapter->stats.txerrc;
3691 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3692 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3693 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3694 if (adapter->hw.bad_tx_carr_stats_fd &&
3695 adapter->link_duplex == FULL_DUPLEX) {
3696 adapter->net_stats.tx_carrier_errors = 0;
3697 adapter->stats.tncrs = 0;
3698 }
3699
3700 /* Tx Dropped needs to be maintained elsewhere */
3701
3702 /* Phy Stats */
3703 if (hw->media_type == e1000_media_type_copper) {
3704 if ((adapter->link_speed == SPEED_1000) &&
3705 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3706 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3707 adapter->phy_stats.idle_errors += phy_tmp;
3708 }
3709
3710 if ((hw->mac_type <= e1000_82546) &&
3711 (hw->phy_type == e1000_phy_m88) &&
3712 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3713 adapter->phy_stats.receive_errors += phy_tmp;
3714 }
3715
3716 /* Management Stats */
3717 if (adapter->hw.has_smbus) {
3718 adapter->stats.mgptc += E1000_READ_REG(hw, MGTPTC);
3719 adapter->stats.mgprc += E1000_READ_REG(hw, MGTPRC);
3720 adapter->stats.mgpdc += E1000_READ_REG(hw, MGTPDC);
3721 }
3722
3723 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3724 }
3725
3726 /**
3727 * e1000_intr_msi - Interrupt Handler
3728 * @irq: interrupt number
3729 * @data: pointer to a network interface device structure
3730 **/
3731
3732 static irqreturn_t
3733 e1000_intr_msi(int irq, void *data)
3734 {
3735 struct net_device *netdev = data;
3736 struct e1000_adapter *adapter = netdev_priv(netdev);
3737 struct e1000_hw *hw = &adapter->hw;
3738 #ifndef CONFIG_E1000_NAPI
3739 int i;
3740 #endif
3741 uint32_t icr = E1000_READ_REG(hw, ICR);
3742
3743 #ifdef CONFIG_E1000_NAPI
3744 /* read ICR disables interrupts using IAM, so keep up with our
3745 * enable/disable accounting */
3746 atomic_inc(&adapter->irq_sem);
3747 #endif
3748 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3749 hw->get_link_status = 1;
3750 /* 80003ES2LAN workaround-- For packet buffer work-around on
3751 * link down event; disable receives here in the ISR and reset
3752 * adapter in watchdog */
3753 if (netif_carrier_ok(netdev) &&
3754 (adapter->hw.mac_type == e1000_80003es2lan)) {
3755 /* disable receives */
3756 uint32_t rctl = E1000_READ_REG(hw, RCTL);
3757 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3758 }
3759 /* guard against interrupt when we're going down */
3760 if (!test_bit(__E1000_DOWN, &adapter->flags))
3761 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3762 }
3763
3764 #ifdef CONFIG_E1000_NAPI
3765 if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3766 adapter->total_tx_bytes = 0;
3767 adapter->total_tx_packets = 0;
3768 adapter->total_rx_bytes = 0;
3769 adapter->total_rx_packets = 0;
3770 __netif_rx_schedule(netdev, &adapter->napi);
3771 } else
3772 e1000_irq_enable(adapter);
3773 #else
3774 adapter->total_tx_bytes = 0;
3775 adapter->total_rx_bytes = 0;
3776 adapter->total_tx_packets = 0;
3777 adapter->total_rx_packets = 0;
3778
3779 for (i = 0; i < E1000_MAX_INTR; i++)
3780 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3781 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3782 break;
3783
3784 if (likely(adapter->itr_setting & 3))
3785 e1000_set_itr(adapter);
3786 #endif
3787
3788 return IRQ_HANDLED;
3789 }
3790
3791 /**
3792 * e1000_intr - Interrupt Handler
3793 * @irq: interrupt number
3794 * @data: pointer to a network interface device structure
3795 **/
3796
3797 static irqreturn_t
3798 e1000_intr(int irq, void *data)
3799 {
3800 struct net_device *netdev = data;
3801 struct e1000_adapter *adapter = netdev_priv(netdev);
3802 struct e1000_hw *hw = &adapter->hw;
3803 uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3804 #ifndef CONFIG_E1000_NAPI
3805 int i;
3806 #endif
3807 if (unlikely(!icr))
3808 return IRQ_NONE; /* Not our interrupt */
3809
3810 #ifdef CONFIG_E1000_NAPI
3811 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3812 * not set, then the adapter didn't send an interrupt */
3813 if (unlikely(hw->mac_type >= e1000_82571 &&
3814 !(icr & E1000_ICR_INT_ASSERTED)))
3815 return IRQ_NONE;
3816
3817 /* Interrupt Auto-Mask...upon reading ICR,
3818 * interrupts are masked. No need for the
3819 * IMC write, but it does mean we should
3820 * account for it ASAP. */
3821 if (likely(hw->mac_type >= e1000_82571))
3822 atomic_inc(&adapter->irq_sem);
3823 #endif
3824
3825 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3826 hw->get_link_status = 1;
3827 /* 80003ES2LAN workaround--
3828 * For packet buffer work-around on link down event;
3829 * disable receives here in the ISR and
3830 * reset adapter in watchdog
3831 */
3832 if (netif_carrier_ok(netdev) &&
3833 (adapter->hw.mac_type == e1000_80003es2lan)) {
3834 /* disable receives */
3835 rctl = E1000_READ_REG(hw, RCTL);
3836 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3837 }
3838 /* guard against interrupt when we're going down */
3839 if (!test_bit(__E1000_DOWN, &adapter->flags))
3840 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3841 }
3842
3843 #ifdef CONFIG_E1000_NAPI
3844 if (unlikely(hw->mac_type < e1000_82571)) {
3845 /* disable interrupts, without the synchronize_irq bit */
3846 atomic_inc(&adapter->irq_sem);
3847 E1000_WRITE_REG(hw, IMC, ~0);
3848 E1000_WRITE_FLUSH(hw);
3849 }
3850 if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3851 adapter->total_tx_bytes = 0;
3852 adapter->total_tx_packets = 0;
3853 adapter->total_rx_bytes = 0;
3854 adapter->total_rx_packets = 0;
3855 __netif_rx_schedule(netdev, &adapter->napi);
3856 } else
3857 /* this really should not happen! if it does it is basically a
3858 * bug, but not a hard error, so enable ints and continue */
3859 e1000_irq_enable(adapter);
3860 #else
3861 /* Writing IMC and IMS is needed for 82547.
3862 * Due to Hub Link bus being occupied, an interrupt
3863 * de-assertion message is not able to be sent.
3864 * When an interrupt assertion message is generated later,
3865 * two messages are re-ordered and sent out.
3866 * That causes APIC to think 82547 is in de-assertion
3867 * state, while 82547 is in assertion state, resulting
3868 * in dead lock. Writing IMC forces 82547 into
3869 * de-assertion state.
3870 */
3871 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3872 atomic_inc(&adapter->irq_sem);
3873 E1000_WRITE_REG(hw, IMC, ~0);
3874 }
3875
3876 adapter->total_tx_bytes = 0;
3877 adapter->total_rx_bytes = 0;
3878 adapter->total_tx_packets = 0;
3879 adapter->total_rx_packets = 0;
3880
3881 for (i = 0; i < E1000_MAX_INTR; i++)
3882 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3883 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3884 break;
3885
3886 if (likely(adapter->itr_setting & 3))
3887 e1000_set_itr(adapter);
3888
3889 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3890 e1000_irq_enable(adapter);
3891
3892 #endif
3893 return IRQ_HANDLED;
3894 }
3895
3896 #ifdef CONFIG_E1000_NAPI
3897 /**
3898 * e1000_clean - NAPI Rx polling callback
3899 * @adapter: board private structure
3900 **/
3901
3902 static int
3903 e1000_clean(struct napi_struct *napi, int budget)
3904 {
3905 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3906 struct net_device *poll_dev = adapter->netdev;
3907 int tx_cleaned = 0, work_done = 0;
3908
3909 /* Must NOT use netdev_priv macro here. */
3910 adapter = poll_dev->priv;
3911
3912 /* e1000_clean is called per-cpu. This lock protects
3913 * tx_ring[0] from being cleaned by multiple cpus
3914 * simultaneously. A failure obtaining the lock means
3915 * tx_ring[0] is currently being cleaned anyway. */
3916 if (spin_trylock(&adapter->tx_queue_lock)) {
3917 tx_cleaned = e1000_clean_tx_irq(adapter,
3918 &adapter->tx_ring[0]);
3919 spin_unlock(&adapter->tx_queue_lock);
3920 }
3921
3922 adapter->clean_rx(adapter, &adapter->rx_ring[0],
3923 &work_done, budget);
3924
3925 if (tx_cleaned)
3926 work_done = budget;
3927
3928 /* If budget not fully consumed, exit the polling mode */
3929 if (work_done < budget) {
3930 if (likely(adapter->itr_setting & 3))
3931 e1000_set_itr(adapter);
3932 netif_rx_complete(poll_dev, napi);
3933 e1000_irq_enable(adapter);
3934 }
3935
3936 return work_done;
3937 }
3938
3939 #endif
3940 /**
3941 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3942 * @adapter: board private structure
3943 **/
3944
3945 static boolean_t
3946 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3947 struct e1000_tx_ring *tx_ring)
3948 {
3949 struct net_device *netdev = adapter->netdev;
3950 struct e1000_tx_desc *tx_desc, *eop_desc;
3951 struct e1000_buffer *buffer_info;
3952 unsigned int i, eop;
3953 #ifdef CONFIG_E1000_NAPI
3954 unsigned int count = 0;
3955 #endif
3956 boolean_t cleaned = FALSE;
3957 unsigned int total_tx_bytes=0, total_tx_packets=0;
3958
3959 i = tx_ring->next_to_clean;
3960 eop = tx_ring->buffer_info[i].next_to_watch;
3961 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3962
3963 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3964 for (cleaned = FALSE; !cleaned; ) {
3965 tx_desc = E1000_TX_DESC(*tx_ring, i);
3966 buffer_info = &tx_ring->buffer_info[i];
3967 cleaned = (i == eop);
3968
3969 if (cleaned) {
3970 struct sk_buff *skb = buffer_info->skb;
3971 unsigned int segs, bytecount;
3972 segs = skb_shinfo(skb)->gso_segs ?: 1;
3973 /* multiply data chunks by size of headers */
3974 bytecount = ((segs - 1) * skb_headlen(skb)) +
3975 skb->len;
3976 total_tx_packets += segs;
3977 total_tx_bytes += bytecount;
3978 }
3979 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3980 tx_desc->upper.data = 0;
3981
3982 if (unlikely(++i == tx_ring->count)) i = 0;
3983 }
3984
3985 eop = tx_ring->buffer_info[i].next_to_watch;
3986 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3987 #ifdef CONFIG_E1000_NAPI
3988 #define E1000_TX_WEIGHT 64
3989 /* weight of a sort for tx, to avoid endless transmit cleanup */
3990 if (count++ == E1000_TX_WEIGHT) break;
3991 #endif
3992 }
3993
3994 tx_ring->next_to_clean = i;
3995
3996 #define TX_WAKE_THRESHOLD 32
3997 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
3998 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3999 /* Make sure that anybody stopping the queue after this
4000 * sees the new next_to_clean.
4001 */
4002 smp_mb();
4003 if (netif_queue_stopped(netdev)) {
4004 netif_wake_queue(netdev);
4005 ++adapter->restart_queue;
4006 }
4007 }
4008
4009 if (adapter->detect_tx_hung) {
4010 /* Detect a transmit hang in hardware, this serializes the
4011 * check with the clearing of time_stamp and movement of i */
4012 adapter->detect_tx_hung = FALSE;
4013 if (tx_ring->buffer_info[eop].dma &&
4014 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
4015 (adapter->tx_timeout_factor * HZ))
4016 && !(E1000_READ_REG(&adapter->hw, STATUS) &
4017 E1000_STATUS_TXOFF)) {
4018
4019 /* detected Tx unit hang */
4020 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
4021 " Tx Queue <%lu>\n"
4022 " TDH <%x>\n"
4023 " TDT <%x>\n"
4024 " next_to_use <%x>\n"
4025 " next_to_clean <%x>\n"
4026 "buffer_info[next_to_clean]\n"
4027 " time_stamp <%lx>\n"
4028 " next_to_watch <%x>\n"
4029 " jiffies <%lx>\n"
4030 " next_to_watch.status <%x>\n",
4031 (unsigned long)((tx_ring - adapter->tx_ring) /
4032 sizeof(struct e1000_tx_ring)),
4033 readl(adapter->hw.hw_addr + tx_ring->tdh),
4034 readl(adapter->hw.hw_addr + tx_ring->tdt),
4035 tx_ring->next_to_use,
4036 tx_ring->next_to_clean,
4037 tx_ring->buffer_info[eop].time_stamp,
4038 eop,
4039 jiffies,
4040 eop_desc->upper.fields.status);
4041 netif_stop_queue(netdev);
4042 }
4043 }
4044 adapter->total_tx_bytes += total_tx_bytes;
4045 adapter->total_tx_packets += total_tx_packets;
4046 adapter->net_stats.tx_bytes += total_tx_bytes;
4047 adapter->net_stats.tx_packets += total_tx_packets;
4048 return cleaned;
4049 }
4050
4051 /**
4052 * e1000_rx_checksum - Receive Checksum Offload for 82543
4053 * @adapter: board private structure
4054 * @status_err: receive descriptor status and error fields
4055 * @csum: receive descriptor csum field
4056 * @sk_buff: socket buffer with received data
4057 **/
4058
4059 static void
4060 e1000_rx_checksum(struct e1000_adapter *adapter,
4061 uint32_t status_err, uint32_t csum,
4062 struct sk_buff *skb)
4063 {
4064 uint16_t status = (uint16_t)status_err;
4065 uint8_t errors = (uint8_t)(status_err >> 24);
4066 skb->ip_summed = CHECKSUM_NONE;
4067
4068 /* 82543 or newer only */
4069 if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
4070 /* Ignore Checksum bit is set */
4071 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4072 /* TCP/UDP checksum error bit is set */
4073 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4074 /* let the stack verify checksum errors */
4075 adapter->hw_csum_err++;
4076 return;
4077 }
4078 /* TCP/UDP Checksum has not been calculated */
4079 if (adapter->hw.mac_type <= e1000_82547_rev_2) {
4080 if (!(status & E1000_RXD_STAT_TCPCS))
4081 return;
4082 } else {
4083 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4084 return;
4085 }
4086 /* It must be a TCP or UDP packet with a valid checksum */
4087 if (likely(status & E1000_RXD_STAT_TCPCS)) {
4088 /* TCP checksum is good */
4089 skb->ip_summed = CHECKSUM_UNNECESSARY;
4090 } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
4091 /* IP fragment with UDP payload */
4092 /* Hardware complements the payload checksum, so we undo it
4093 * and then put the value in host order for further stack use.
4094 */
4095 __sum16 sum = (__force __sum16)htons(csum);
4096 skb->csum = csum_unfold(~sum);
4097 skb->ip_summed = CHECKSUM_COMPLETE;
4098 }
4099 adapter->hw_csum_good++;
4100 }
4101
4102 /**
4103 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4104 * @adapter: board private structure
4105 **/
4106
4107 static boolean_t
4108 #ifdef CONFIG_E1000_NAPI
4109 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4110 struct e1000_rx_ring *rx_ring,
4111 int *work_done, int work_to_do)
4112 #else
4113 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4114 struct e1000_rx_ring *rx_ring)
4115 #endif
4116 {
4117 struct net_device *netdev = adapter->netdev;
4118 struct pci_dev *pdev = adapter->pdev;
4119 struct e1000_rx_desc *rx_desc, *next_rxd;
4120 struct e1000_buffer *buffer_info, *next_buffer;
4121 unsigned long flags;
4122 uint32_t length;
4123 uint8_t last_byte;
4124 unsigned int i;
4125 int cleaned_count = 0;
4126 boolean_t cleaned = FALSE;
4127 unsigned int total_rx_bytes=0, total_rx_packets=0;
4128
4129 i = rx_ring->next_to_clean;
4130 rx_desc = E1000_RX_DESC(*rx_ring, i);
4131 buffer_info = &rx_ring->buffer_info[i];
4132
4133 while (rx_desc->status & E1000_RXD_STAT_DD) {
4134 struct sk_buff *skb;
4135 u8 status;
4136
4137 #ifdef CONFIG_E1000_NAPI
4138 if (*work_done >= work_to_do)
4139 break;
4140 (*work_done)++;
4141 #endif
4142 status = rx_desc->status;
4143 skb = buffer_info->skb;
4144 buffer_info->skb = NULL;
4145
4146 prefetch(skb->data - NET_IP_ALIGN);
4147
4148 if (++i == rx_ring->count) i = 0;
4149 next_rxd = E1000_RX_DESC(*rx_ring, i);
4150 prefetch(next_rxd);
4151
4152 next_buffer = &rx_ring->buffer_info[i];
4153
4154 cleaned = TRUE;
4155 cleaned_count++;
4156 pci_unmap_single(pdev,
4157 buffer_info->dma,
4158 buffer_info->length,
4159 PCI_DMA_FROMDEVICE);
4160
4161 length = le16_to_cpu(rx_desc->length);
4162
4163 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4164 /* All receives must fit into a single buffer */
4165 E1000_DBG("%s: Receive packet consumed multiple"
4166 " buffers\n", netdev->name);
4167 /* recycle */
4168 buffer_info->skb = skb;
4169 goto next_desc;
4170 }
4171
4172 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4173 last_byte = *(skb->data + length - 1);
4174 if (TBI_ACCEPT(&adapter->hw, status,
4175 rx_desc->errors, length, last_byte)) {
4176 spin_lock_irqsave(&adapter->stats_lock, flags);
4177 e1000_tbi_adjust_stats(&adapter->hw,
4178 &adapter->stats,
4179 length, skb->data);
4180 spin_unlock_irqrestore(&adapter->stats_lock,
4181 flags);
4182 length--;
4183 } else {
4184 /* recycle */
4185 buffer_info->skb = skb;
4186 goto next_desc;
4187 }
4188 }
4189
4190 /* adjust length to remove Ethernet CRC, this must be
4191 * done after the TBI_ACCEPT workaround above */
4192 length -= 4;
4193
4194 /* probably a little skewed due to removing CRC */
4195 total_rx_bytes += length;
4196 total_rx_packets++;
4197
4198 /* code added for copybreak, this should improve
4199 * performance for small packets with large amounts
4200 * of reassembly being done in the stack */
4201 if (length < copybreak) {
4202 struct sk_buff *new_skb =
4203 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4204 if (new_skb) {
4205 skb_reserve(new_skb, NET_IP_ALIGN);
4206 skb_copy_to_linear_data_offset(new_skb,
4207 -NET_IP_ALIGN,
4208 (skb->data -
4209 NET_IP_ALIGN),
4210 (length +
4211 NET_IP_ALIGN));
4212 /* save the skb in buffer_info as good */
4213 buffer_info->skb = skb;
4214 skb = new_skb;
4215 }
4216 /* else just continue with the old one */
4217 }
4218 /* end copybreak code */
4219 skb_put(skb, length);
4220
4221 /* Receive Checksum Offload */
4222 e1000_rx_checksum(adapter,
4223 (uint32_t)(status) |
4224 ((uint32_t)(rx_desc->errors) << 24),
4225 le16_to_cpu(rx_desc->csum), skb);
4226
4227 skb->protocol = eth_type_trans(skb, netdev);
4228 #ifdef CONFIG_E1000_NAPI
4229 if (unlikely(adapter->vlgrp &&
4230 (status & E1000_RXD_STAT_VP))) {
4231 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4232 le16_to_cpu(rx_desc->special) &
4233 E1000_RXD_SPC_VLAN_MASK);
4234 } else {
4235 netif_receive_skb(skb);
4236 }
4237 #else /* CONFIG_E1000_NAPI */
4238 if (unlikely(adapter->vlgrp &&
4239 (status & E1000_RXD_STAT_VP))) {
4240 vlan_hwaccel_rx(skb, adapter->vlgrp,
4241 le16_to_cpu(rx_desc->special) &
4242 E1000_RXD_SPC_VLAN_MASK);
4243 } else {
4244 netif_rx(skb);
4245 }
4246 #endif /* CONFIG_E1000_NAPI */
4247 netdev->last_rx = jiffies;
4248
4249 next_desc:
4250 rx_desc->status = 0;
4251
4252 /* return some buffers to hardware, one at a time is too slow */
4253 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4254 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4255 cleaned_count = 0;
4256 }
4257
4258 /* use prefetched values */
4259 rx_desc = next_rxd;
4260 buffer_info = next_buffer;
4261 }
4262 rx_ring->next_to_clean = i;
4263
4264 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4265 if (cleaned_count)
4266 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4267
4268 adapter->total_rx_packets += total_rx_packets;
4269 adapter->total_rx_bytes += total_rx_bytes;
4270 adapter->net_stats.rx_bytes += total_rx_bytes;
4271 adapter->net_stats.rx_packets += total_rx_packets;
4272 return cleaned;
4273 }
4274
4275 /**
4276 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4277 * @adapter: board private structure
4278 **/
4279
4280 static boolean_t
4281 #ifdef CONFIG_E1000_NAPI
4282 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4283 struct e1000_rx_ring *rx_ring,
4284 int *work_done, int work_to_do)
4285 #else
4286 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4287 struct e1000_rx_ring *rx_ring)
4288 #endif
4289 {
4290 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4291 struct net_device *netdev = adapter->netdev;
4292 struct pci_dev *pdev = adapter->pdev;
4293 struct e1000_buffer *buffer_info, *next_buffer;
4294 struct e1000_ps_page *ps_page;
4295 struct e1000_ps_page_dma *ps_page_dma;
4296 struct sk_buff *skb;
4297 unsigned int i, j;
4298 uint32_t length, staterr;
4299 int cleaned_count = 0;
4300 boolean_t cleaned = FALSE;
4301 unsigned int total_rx_bytes=0, total_rx_packets=0;
4302
4303 i = rx_ring->next_to_clean;
4304 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4305 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4306 buffer_info = &rx_ring->buffer_info[i];
4307
4308 while (staterr & E1000_RXD_STAT_DD) {
4309 ps_page = &rx_ring->ps_page[i];
4310 ps_page_dma = &rx_ring->ps_page_dma[i];
4311 #ifdef CONFIG_E1000_NAPI
4312 if (unlikely(*work_done >= work_to_do))
4313 break;
4314 (*work_done)++;
4315 #endif
4316 skb = buffer_info->skb;
4317
4318 /* in the packet split case this is header only */
4319 prefetch(skb->data - NET_IP_ALIGN);
4320
4321 if (++i == rx_ring->count) i = 0;
4322 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4323 prefetch(next_rxd);
4324
4325 next_buffer = &rx_ring->buffer_info[i];
4326
4327 cleaned = TRUE;
4328 cleaned_count++;
4329 pci_unmap_single(pdev, buffer_info->dma,
4330 buffer_info->length,
4331 PCI_DMA_FROMDEVICE);
4332
4333 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4334 E1000_DBG("%s: Packet Split buffers didn't pick up"
4335 " the full packet\n", netdev->name);
4336 dev_kfree_skb_irq(skb);
4337 goto next_desc;
4338 }
4339
4340 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4341 dev_kfree_skb_irq(skb);
4342 goto next_desc;
4343 }
4344
4345 length = le16_to_cpu(rx_desc->wb.middle.length0);
4346
4347 if (unlikely(!length)) {
4348 E1000_DBG("%s: Last part of the packet spanning"
4349 " multiple descriptors\n", netdev->name);
4350 dev_kfree_skb_irq(skb);
4351 goto next_desc;
4352 }
4353
4354 /* Good Receive */
4355 skb_put(skb, length);
4356
4357 {
4358 /* this looks ugly, but it seems compiler issues make it
4359 more efficient than reusing j */
4360 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4361
4362 /* page alloc/put takes too long and effects small packet
4363 * throughput, so unsplit small packets and save the alloc/put*/
4364 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
4365 u8 *vaddr;
4366 /* there is no documentation about how to call
4367 * kmap_atomic, so we can't hold the mapping
4368 * very long */
4369 pci_dma_sync_single_for_cpu(pdev,
4370 ps_page_dma->ps_page_dma[0],
4371 PAGE_SIZE,
4372 PCI_DMA_FROMDEVICE);
4373 vaddr = kmap_atomic(ps_page->ps_page[0],
4374 KM_SKB_DATA_SOFTIRQ);
4375 memcpy(skb_tail_pointer(skb), vaddr, l1);
4376 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4377 pci_dma_sync_single_for_device(pdev,
4378 ps_page_dma->ps_page_dma[0],
4379 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4380 /* remove the CRC */
4381 l1 -= 4;
4382 skb_put(skb, l1);
4383 goto copydone;
4384 } /* if */
4385 }
4386
4387 for (j = 0; j < adapter->rx_ps_pages; j++) {
4388 if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
4389 break;
4390 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4391 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4392 ps_page_dma->ps_page_dma[j] = 0;
4393 skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4394 length);
4395 ps_page->ps_page[j] = NULL;
4396 skb->len += length;
4397 skb->data_len += length;
4398 skb->truesize += length;
4399 }
4400
4401 /* strip the ethernet crc, problem is we're using pages now so
4402 * this whole operation can get a little cpu intensive */
4403 pskb_trim(skb, skb->len - 4);
4404
4405 copydone:
4406 total_rx_bytes += skb->len;
4407 total_rx_packets++;
4408
4409 e1000_rx_checksum(adapter, staterr,
4410 le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4411 skb->protocol = eth_type_trans(skb, netdev);
4412
4413 if (likely(rx_desc->wb.upper.header_status &
4414 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4415 adapter->rx_hdr_split++;
4416 #ifdef CONFIG_E1000_NAPI
4417 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4418 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4419 le16_to_cpu(rx_desc->wb.middle.vlan) &
4420 E1000_RXD_SPC_VLAN_MASK);
4421 } else {
4422 netif_receive_skb(skb);
4423 }
4424 #else /* CONFIG_E1000_NAPI */
4425 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4426 vlan_hwaccel_rx(skb, adapter->vlgrp,
4427 le16_to_cpu(rx_desc->wb.middle.vlan) &
4428 E1000_RXD_SPC_VLAN_MASK);
4429 } else {
4430 netif_rx(skb);
4431 }
4432 #endif /* CONFIG_E1000_NAPI */
4433 netdev->last_rx = jiffies;
4434
4435 next_desc:
4436 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4437 buffer_info->skb = NULL;
4438
4439 /* return some buffers to hardware, one at a time is too slow */
4440 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4441 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4442 cleaned_count = 0;
4443 }
4444
4445 /* use prefetched values */
4446 rx_desc = next_rxd;
4447 buffer_info = next_buffer;
4448
4449 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4450 }
4451 rx_ring->next_to_clean = i;
4452
4453 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4454 if (cleaned_count)
4455 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4456
4457 adapter->total_rx_packets += total_rx_packets;
4458 adapter->total_rx_bytes += total_rx_bytes;
4459 adapter->net_stats.rx_bytes += total_rx_bytes;
4460 adapter->net_stats.rx_packets += total_rx_packets;
4461 return cleaned;
4462 }
4463
4464 /**
4465 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4466 * @adapter: address of board private structure
4467 **/
4468
4469 static void
4470 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4471 struct e1000_rx_ring *rx_ring,
4472 int cleaned_count)
4473 {
4474 struct net_device *netdev = adapter->netdev;
4475 struct pci_dev *pdev = adapter->pdev;
4476 struct e1000_rx_desc *rx_desc;
4477 struct e1000_buffer *buffer_info;
4478 struct sk_buff *skb;
4479 unsigned int i;
4480 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4481
4482 i = rx_ring->next_to_use;
4483 buffer_info = &rx_ring->buffer_info[i];
4484
4485 while (cleaned_count--) {
4486 skb = buffer_info->skb;
4487 if (skb) {
4488 skb_trim(skb, 0);
4489 goto map_skb;
4490 }
4491
4492 skb = netdev_alloc_skb(netdev, bufsz);
4493 if (unlikely(!skb)) {
4494 /* Better luck next round */
4495 adapter->alloc_rx_buff_failed++;
4496 break;
4497 }
4498
4499 /* Fix for errata 23, can't cross 64kB boundary */
4500 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4501 struct sk_buff *oldskb = skb;
4502 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4503 "at %p\n", bufsz, skb->data);
4504 /* Try again, without freeing the previous */
4505 skb = netdev_alloc_skb(netdev, bufsz);
4506 /* Failed allocation, critical failure */
4507 if (!skb) {
4508 dev_kfree_skb(oldskb);
4509 break;
4510 }
4511
4512 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4513 /* give up */
4514 dev_kfree_skb(skb);
4515 dev_kfree_skb(oldskb);
4516 break; /* while !buffer_info->skb */
4517 }
4518
4519 /* Use new allocation */
4520 dev_kfree_skb(oldskb);
4521 }
4522 /* Make buffer alignment 2 beyond a 16 byte boundary
4523 * this will result in a 16 byte aligned IP header after
4524 * the 14 byte MAC header is removed
4525 */
4526 skb_reserve(skb, NET_IP_ALIGN);
4527
4528 buffer_info->skb = skb;
4529 buffer_info->length = adapter->rx_buffer_len;
4530 map_skb:
4531 buffer_info->dma = pci_map_single(pdev,
4532 skb->data,
4533 adapter->rx_buffer_len,
4534 PCI_DMA_FROMDEVICE);
4535
4536 /* Fix for errata 23, can't cross 64kB boundary */
4537 if (!e1000_check_64k_bound(adapter,
4538 (void *)(unsigned long)buffer_info->dma,
4539 adapter->rx_buffer_len)) {
4540 DPRINTK(RX_ERR, ERR,
4541 "dma align check failed: %u bytes at %p\n",
4542 adapter->rx_buffer_len,
4543 (void *)(unsigned long)buffer_info->dma);
4544 dev_kfree_skb(skb);
4545 buffer_info->skb = NULL;
4546
4547 pci_unmap_single(pdev, buffer_info->dma,
4548 adapter->rx_buffer_len,
4549 PCI_DMA_FROMDEVICE);
4550
4551 break; /* while !buffer_info->skb */
4552 }
4553 rx_desc = E1000_RX_DESC(*rx_ring, i);
4554 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4555
4556 if (unlikely(++i == rx_ring->count))
4557 i = 0;
4558 buffer_info = &rx_ring->buffer_info[i];
4559 }
4560
4561 if (likely(rx_ring->next_to_use != i)) {
4562 rx_ring->next_to_use = i;
4563 if (unlikely(i-- == 0))
4564 i = (rx_ring->count - 1);
4565
4566 /* Force memory writes to complete before letting h/w
4567 * know there are new descriptors to fetch. (Only
4568 * applicable for weak-ordered memory model archs,
4569 * such as IA-64). */
4570 wmb();
4571 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4572 }
4573 }
4574
4575 /**
4576 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4577 * @adapter: address of board private structure
4578 **/
4579
4580 static void
4581 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4582 struct e1000_rx_ring *rx_ring,
4583 int cleaned_count)
4584 {
4585 struct net_device *netdev = adapter->netdev;
4586 struct pci_dev *pdev = adapter->pdev;
4587 union e1000_rx_desc_packet_split *rx_desc;
4588 struct e1000_buffer *buffer_info;
4589 struct e1000_ps_page *ps_page;
4590 struct e1000_ps_page_dma *ps_page_dma;
4591 struct sk_buff *skb;
4592 unsigned int i, j;
4593
4594 i = rx_ring->next_to_use;
4595 buffer_info = &rx_ring->buffer_info[i];
4596 ps_page = &rx_ring->ps_page[i];
4597 ps_page_dma = &rx_ring->ps_page_dma[i];
4598
4599 while (cleaned_count--) {
4600 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4601
4602 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4603 if (j < adapter->rx_ps_pages) {
4604 if (likely(!ps_page->ps_page[j])) {
4605 ps_page->ps_page[j] =
4606 alloc_page(GFP_ATOMIC);
4607 if (unlikely(!ps_page->ps_page[j])) {
4608 adapter->alloc_rx_buff_failed++;
4609 goto no_buffers;
4610 }
4611 ps_page_dma->ps_page_dma[j] =
4612 pci_map_page(pdev,
4613 ps_page->ps_page[j],
4614 0, PAGE_SIZE,
4615 PCI_DMA_FROMDEVICE);
4616 }
4617 /* Refresh the desc even if buffer_addrs didn't
4618 * change because each write-back erases
4619 * this info.
4620 */
4621 rx_desc->read.buffer_addr[j+1] =
4622 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4623 } else
4624 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
4625 }
4626
4627 skb = netdev_alloc_skb(netdev,
4628 adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4629
4630 if (unlikely(!skb)) {
4631 adapter->alloc_rx_buff_failed++;
4632 break;
4633 }
4634
4635 /* Make buffer alignment 2 beyond a 16 byte boundary
4636 * this will result in a 16 byte aligned IP header after
4637 * the 14 byte MAC header is removed
4638 */
4639 skb_reserve(skb, NET_IP_ALIGN);
4640
4641 buffer_info->skb = skb;
4642 buffer_info->length = adapter->rx_ps_bsize0;
4643 buffer_info->dma = pci_map_single(pdev, skb->data,
4644 adapter->rx_ps_bsize0,
4645 PCI_DMA_FROMDEVICE);
4646
4647 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4648
4649 if (unlikely(++i == rx_ring->count)) i = 0;
4650 buffer_info = &rx_ring->buffer_info[i];
4651 ps_page = &rx_ring->ps_page[i];
4652 ps_page_dma = &rx_ring->ps_page_dma[i];
4653 }
4654
4655 no_buffers:
4656 if (likely(rx_ring->next_to_use != i)) {
4657 rx_ring->next_to_use = i;
4658 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4659
4660 /* Force memory writes to complete before letting h/w
4661 * know there are new descriptors to fetch. (Only
4662 * applicable for weak-ordered memory model archs,
4663 * such as IA-64). */
4664 wmb();
4665 /* Hardware increments by 16 bytes, but packet split
4666 * descriptors are 32 bytes...so we increment tail
4667 * twice as much.
4668 */
4669 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4670 }
4671 }
4672
4673 /**
4674 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4675 * @adapter:
4676 **/
4677
4678 static void
4679 e1000_smartspeed(struct e1000_adapter *adapter)
4680 {
4681 uint16_t phy_status;
4682 uint16_t phy_ctrl;
4683
4684 if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4685 !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4686 return;
4687
4688 if (adapter->smartspeed == 0) {
4689 /* If Master/Slave config fault is asserted twice,
4690 * we assume back-to-back */
4691 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4692 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4693 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4694 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4695 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4696 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4697 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4698 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4699 phy_ctrl);
4700 adapter->smartspeed++;
4701 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4702 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4703 &phy_ctrl)) {
4704 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4705 MII_CR_RESTART_AUTO_NEG);
4706 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4707 phy_ctrl);
4708 }
4709 }
4710 return;
4711 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4712 /* If still no link, perhaps using 2/3 pair cable */
4713 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4714 phy_ctrl |= CR_1000T_MS_ENABLE;
4715 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4716 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4717 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4718 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4719 MII_CR_RESTART_AUTO_NEG);
4720 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4721 }
4722 }
4723 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4724 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4725 adapter->smartspeed = 0;
4726 }
4727
4728 /**
4729 * e1000_ioctl -
4730 * @netdev:
4731 * @ifreq:
4732 * @cmd:
4733 **/
4734
4735 static int
4736 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4737 {
4738 switch (cmd) {
4739 case SIOCGMIIPHY:
4740 case SIOCGMIIREG:
4741 case SIOCSMIIREG:
4742 return e1000_mii_ioctl(netdev, ifr, cmd);
4743 default:
4744 return -EOPNOTSUPP;
4745 }
4746 }
4747
4748 /**
4749 * e1000_mii_ioctl -
4750 * @netdev:
4751 * @ifreq:
4752 * @cmd:
4753 **/
4754
4755 static int
4756 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4757 {
4758 struct e1000_adapter *adapter = netdev_priv(netdev);
4759 struct mii_ioctl_data *data = if_mii(ifr);
4760 int retval;
4761 uint16_t mii_reg;
4762 uint16_t spddplx;
4763 unsigned long flags;
4764
4765 if (adapter->hw.media_type != e1000_media_type_copper)
4766 return -EOPNOTSUPP;
4767
4768 switch (cmd) {
4769 case SIOCGMIIPHY:
4770 data->phy_id = adapter->hw.phy_addr;
4771 break;
4772 case SIOCGMIIREG:
4773 if (!capable(CAP_NET_ADMIN))
4774 return -EPERM;
4775 spin_lock_irqsave(&adapter->stats_lock, flags);
4776 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4777 &data->val_out)) {
4778 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4779 return -EIO;
4780 }
4781 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4782 break;
4783 case SIOCSMIIREG:
4784 if (!capable(CAP_NET_ADMIN))
4785 return -EPERM;
4786 if (data->reg_num & ~(0x1F))
4787 return -EFAULT;
4788 mii_reg = data->val_in;
4789 spin_lock_irqsave(&adapter->stats_lock, flags);
4790 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4791 mii_reg)) {
4792 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4793 return -EIO;
4794 }
4795 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4796 if (adapter->hw.media_type == e1000_media_type_copper) {
4797 switch (data->reg_num) {
4798 case PHY_CTRL:
4799 if (mii_reg & MII_CR_POWER_DOWN)
4800 break;
4801 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4802 adapter->hw.autoneg = 1;
4803 adapter->hw.autoneg_advertised = 0x2F;
4804 } else {
4805 if (mii_reg & 0x40)
4806 spddplx = SPEED_1000;
4807 else if (mii_reg & 0x2000)
4808 spddplx = SPEED_100;
4809 else
4810 spddplx = SPEED_10;
4811 spddplx += (mii_reg & 0x100)
4812 ? DUPLEX_FULL :
4813 DUPLEX_HALF;
4814 retval = e1000_set_spd_dplx(adapter,
4815 spddplx);
4816 if (retval)
4817 return retval;
4818 }
4819 if (netif_running(adapter->netdev))
4820 e1000_reinit_locked(adapter);
4821 else
4822 e1000_reset(adapter);
4823 break;
4824 case M88E1000_PHY_SPEC_CTRL:
4825 case M88E1000_EXT_PHY_SPEC_CTRL:
4826 if (e1000_phy_reset(&adapter->hw))
4827 return -EIO;
4828 break;
4829 }
4830 } else {
4831 switch (data->reg_num) {
4832 case PHY_CTRL:
4833 if (mii_reg & MII_CR_POWER_DOWN)
4834 break;
4835 if (netif_running(adapter->netdev))
4836 e1000_reinit_locked(adapter);
4837 else
4838 e1000_reset(adapter);
4839 break;
4840 }
4841 }
4842 break;
4843 default:
4844 return -EOPNOTSUPP;
4845 }
4846 return E1000_SUCCESS;
4847 }
4848
4849 void
4850 e1000_pci_set_mwi(struct e1000_hw *hw)
4851 {
4852 struct e1000_adapter *adapter = hw->back;
4853 int ret_val = pci_set_mwi(adapter->pdev);
4854
4855 if (ret_val)
4856 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4857 }
4858
4859 void
4860 e1000_pci_clear_mwi(struct e1000_hw *hw)
4861 {
4862 struct e1000_adapter *adapter = hw->back;
4863
4864 pci_clear_mwi(adapter->pdev);
4865 }
4866
4867 int
4868 e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4869 {
4870 struct e1000_adapter *adapter = hw->back;
4871 return pcix_get_mmrbc(adapter->pdev);
4872 }
4873
4874 void
4875 e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4876 {
4877 struct e1000_adapter *adapter = hw->back;
4878 pcix_set_mmrbc(adapter->pdev, mmrbc);
4879 }
4880
4881 int32_t
4882 e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4883 {
4884 struct e1000_adapter *adapter = hw->back;
4885 uint16_t cap_offset;
4886
4887 cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4888 if (!cap_offset)
4889 return -E1000_ERR_CONFIG;
4890
4891 pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4892
4893 return E1000_SUCCESS;
4894 }
4895
4896 void
4897 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4898 {
4899 outl(value, port);
4900 }
4901
4902 static void
4903 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4904 {
4905 struct e1000_adapter *adapter = netdev_priv(netdev);
4906 uint32_t ctrl, rctl;
4907
4908 e1000_irq_disable(adapter);
4909 adapter->vlgrp = grp;
4910
4911 if (grp) {
4912 /* enable VLAN tag insert/strip */
4913 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4914 ctrl |= E1000_CTRL_VME;
4915 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4916
4917 if (adapter->hw.mac_type != e1000_ich8lan) {
4918 /* enable VLAN receive filtering */
4919 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4920 rctl |= E1000_RCTL_VFE;
4921 rctl &= ~E1000_RCTL_CFIEN;
4922 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4923 e1000_update_mng_vlan(adapter);
4924 }
4925 } else {
4926 /* disable VLAN tag insert/strip */
4927 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4928 ctrl &= ~E1000_CTRL_VME;
4929 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4930
4931 if (adapter->hw.mac_type != e1000_ich8lan) {
4932 /* disable VLAN filtering */
4933 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4934 rctl &= ~E1000_RCTL_VFE;
4935 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4936 if (adapter->mng_vlan_id !=
4937 (uint16_t)E1000_MNG_VLAN_NONE) {
4938 e1000_vlan_rx_kill_vid(netdev,
4939 adapter->mng_vlan_id);
4940 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4941 }
4942 }
4943 }
4944
4945 e1000_irq_enable(adapter);
4946 }
4947
4948 static void
4949 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4950 {
4951 struct e1000_adapter *adapter = netdev_priv(netdev);
4952 uint32_t vfta, index;
4953
4954 if ((adapter->hw.mng_cookie.status &
4955 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4956 (vid == adapter->mng_vlan_id))
4957 return;
4958 /* add VID to filter table */
4959 index = (vid >> 5) & 0x7F;
4960 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4961 vfta |= (1 << (vid & 0x1F));
4962 e1000_write_vfta(&adapter->hw, index, vfta);
4963 }
4964
4965 static void
4966 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4967 {
4968 struct e1000_adapter *adapter = netdev_priv(netdev);
4969 uint32_t vfta, index;
4970
4971 e1000_irq_disable(adapter);
4972 vlan_group_set_device(adapter->vlgrp, vid, NULL);
4973 e1000_irq_enable(adapter);
4974
4975 if ((adapter->hw.mng_cookie.status &
4976 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4977 (vid == adapter->mng_vlan_id)) {
4978 /* release control to f/w */
4979 e1000_release_hw_control(adapter);
4980 return;
4981 }
4982
4983 /* remove VID from filter table */
4984 index = (vid >> 5) & 0x7F;
4985 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4986 vfta &= ~(1 << (vid & 0x1F));
4987 e1000_write_vfta(&adapter->hw, index, vfta);
4988 }
4989
4990 static void
4991 e1000_restore_vlan(struct e1000_adapter *adapter)
4992 {
4993 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4994
4995 if (adapter->vlgrp) {
4996 uint16_t vid;
4997 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4998 if (!vlan_group_get_device(adapter->vlgrp, vid))
4999 continue;
5000 e1000_vlan_rx_add_vid(adapter->netdev, vid);
5001 }
5002 }
5003 }
5004
5005 int
5006 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
5007 {
5008 adapter->hw.autoneg = 0;
5009
5010 /* Fiber NICs only allow 1000 gbps Full duplex */
5011 if ((adapter->hw.media_type == e1000_media_type_fiber) &&
5012 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5013 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5014 return -EINVAL;
5015 }
5016
5017 switch (spddplx) {
5018 case SPEED_10 + DUPLEX_HALF:
5019 adapter->hw.forced_speed_duplex = e1000_10_half;
5020 break;
5021 case SPEED_10 + DUPLEX_FULL:
5022 adapter->hw.forced_speed_duplex = e1000_10_full;
5023 break;
5024 case SPEED_100 + DUPLEX_HALF:
5025 adapter->hw.forced_speed_duplex = e1000_100_half;
5026 break;
5027 case SPEED_100 + DUPLEX_FULL:
5028 adapter->hw.forced_speed_duplex = e1000_100_full;
5029 break;
5030 case SPEED_1000 + DUPLEX_FULL:
5031 adapter->hw.autoneg = 1;
5032 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5033 break;
5034 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5035 default:
5036 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5037 return -EINVAL;
5038 }
5039 return 0;
5040 }
5041
5042 static int
5043 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5044 {
5045 struct net_device *netdev = pci_get_drvdata(pdev);
5046 struct e1000_adapter *adapter = netdev_priv(netdev);
5047 uint32_t ctrl, ctrl_ext, rctl, status;
5048 uint32_t wufc = adapter->wol;
5049 #ifdef CONFIG_PM
5050 int retval = 0;
5051 #endif
5052
5053 netif_device_detach(netdev);
5054
5055 if (netif_running(netdev)) {
5056 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5057 e1000_down(adapter);
5058 }
5059
5060 #ifdef CONFIG_PM
5061 retval = pci_save_state(pdev);
5062 if (retval)
5063 return retval;
5064 #endif
5065
5066 status = E1000_READ_REG(&adapter->hw, STATUS);
5067 if (status & E1000_STATUS_LU)
5068 wufc &= ~E1000_WUFC_LNKC;
5069
5070 if (wufc) {
5071 e1000_setup_rctl(adapter);
5072 e1000_set_rx_mode(netdev);
5073
5074 /* turn on all-multi mode if wake on multicast is enabled */
5075 if (wufc & E1000_WUFC_MC) {
5076 rctl = E1000_READ_REG(&adapter->hw, RCTL);
5077 rctl |= E1000_RCTL_MPE;
5078 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5079 }
5080
5081 if (adapter->hw.mac_type >= e1000_82540) {
5082 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5083 /* advertise wake from D3Cold */
5084 #define E1000_CTRL_ADVD3WUC 0x00100000
5085 /* phy power management enable */
5086 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5087 ctrl |= E1000_CTRL_ADVD3WUC |
5088 E1000_CTRL_EN_PHY_PWR_MGMT;
5089 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5090 }
5091
5092 if (adapter->hw.media_type == e1000_media_type_fiber ||
5093 adapter->hw.media_type == e1000_media_type_internal_serdes) {
5094 /* keep the laser running in D3 */
5095 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
5096 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5097 E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
5098 }
5099
5100 /* Allow time for pending master requests to run */
5101 e1000_disable_pciex_master(&adapter->hw);
5102
5103 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
5104 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
5105 pci_enable_wake(pdev, PCI_D3hot, 1);
5106 pci_enable_wake(pdev, PCI_D3cold, 1);
5107 } else {
5108 E1000_WRITE_REG(&adapter->hw, WUC, 0);
5109 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
5110 pci_enable_wake(pdev, PCI_D3hot, 0);
5111 pci_enable_wake(pdev, PCI_D3cold, 0);
5112 }
5113
5114 e1000_release_manageability(adapter);
5115
5116 /* make sure adapter isn't asleep if manageability is enabled */
5117 if (adapter->en_mng_pt) {
5118 pci_enable_wake(pdev, PCI_D3hot, 1);
5119 pci_enable_wake(pdev, PCI_D3cold, 1);
5120 }
5121
5122 if (adapter->hw.phy_type == e1000_phy_igp_3)
5123 e1000_phy_powerdown_workaround(&adapter->hw);
5124
5125 if (netif_running(netdev))
5126 e1000_free_irq(adapter);
5127
5128 /* Release control of h/w to f/w. If f/w is AMT enabled, this
5129 * would have already happened in close and is redundant. */
5130 e1000_release_hw_control(adapter);
5131
5132 pci_disable_device(pdev);
5133
5134 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5135
5136 return 0;
5137 }
5138
5139 #ifdef CONFIG_PM
5140 static int
5141 e1000_resume(struct pci_dev *pdev)
5142 {
5143 struct net_device *netdev = pci_get_drvdata(pdev);
5144 struct e1000_adapter *adapter = netdev_priv(netdev);
5145 uint32_t err;
5146
5147 pci_set_power_state(pdev, PCI_D0);
5148 pci_restore_state(pdev);
5149 if ((err = pci_enable_device(pdev))) {
5150 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5151 return err;
5152 }
5153 pci_set_master(pdev);
5154
5155 pci_enable_wake(pdev, PCI_D3hot, 0);
5156 pci_enable_wake(pdev, PCI_D3cold, 0);
5157
5158 if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5159 return err;
5160
5161 e1000_power_up_phy(adapter);
5162 e1000_reset(adapter);
5163 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5164
5165 e1000_init_manageability(adapter);
5166
5167 if (netif_running(netdev))
5168 e1000_up(adapter);
5169
5170 netif_device_attach(netdev);
5171
5172 /* If the controller is 82573 and f/w is AMT, do not set
5173 * DRV_LOAD until the interface is up. For all other cases,
5174 * let the f/w know that the h/w is now under the control
5175 * of the driver. */
5176 if (adapter->hw.mac_type != e1000_82573 ||
5177 !e1000_check_mng_mode(&adapter->hw))
5178 e1000_get_hw_control(adapter);
5179
5180 return 0;
5181 }
5182 #endif
5183
5184 static void e1000_shutdown(struct pci_dev *pdev)
5185 {
5186 e1000_suspend(pdev, PMSG_SUSPEND);
5187 }
5188
5189 #ifdef CONFIG_NET_POLL_CONTROLLER
5190 /*
5191 * Polling 'interrupt' - used by things like netconsole to send skbs
5192 * without having to re-enable interrupts. It's not called while
5193 * the interrupt routine is executing.
5194 */
5195 static void
5196 e1000_netpoll(struct net_device *netdev)
5197 {
5198 struct e1000_adapter *adapter = netdev_priv(netdev);
5199
5200 disable_irq(adapter->pdev->irq);
5201 e1000_intr(adapter->pdev->irq, netdev);
5202 e1000_clean_tx_irq(adapter, adapter->tx_ring);
5203 #ifndef CONFIG_E1000_NAPI
5204 adapter->clean_rx(adapter, adapter->rx_ring);
5205 #endif
5206 enable_irq(adapter->pdev->irq);
5207 }
5208 #endif
5209
5210 /**
5211 * e1000_io_error_detected - called when PCI error is detected
5212 * @pdev: Pointer to PCI device
5213 * @state: The current pci conneection state
5214 *
5215 * This function is called after a PCI bus error affecting
5216 * this device has been detected.
5217 */
5218 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
5219 {
5220 struct net_device *netdev = pci_get_drvdata(pdev);
5221 struct e1000_adapter *adapter = netdev->priv;
5222
5223 netif_device_detach(netdev);
5224
5225 if (netif_running(netdev))
5226 e1000_down(adapter);
5227 pci_disable_device(pdev);
5228
5229 /* Request a slot slot reset. */
5230 return PCI_ERS_RESULT_NEED_RESET;
5231 }
5232
5233 /**
5234 * e1000_io_slot_reset - called after the pci bus has been reset.
5235 * @pdev: Pointer to PCI device
5236 *
5237 * Restart the card from scratch, as if from a cold-boot. Implementation
5238 * resembles the first-half of the e1000_resume routine.
5239 */
5240 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5241 {
5242 struct net_device *netdev = pci_get_drvdata(pdev);
5243 struct e1000_adapter *adapter = netdev->priv;
5244
5245 if (pci_enable_device(pdev)) {
5246 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5247 return PCI_ERS_RESULT_DISCONNECT;
5248 }
5249 pci_set_master(pdev);
5250
5251 pci_enable_wake(pdev, PCI_D3hot, 0);
5252 pci_enable_wake(pdev, PCI_D3cold, 0);
5253
5254 e1000_reset(adapter);
5255 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5256
5257 return PCI_ERS_RESULT_RECOVERED;
5258 }
5259
5260 /**
5261 * e1000_io_resume - called when traffic can start flowing again.
5262 * @pdev: Pointer to PCI device
5263 *
5264 * This callback is called when the error recovery driver tells us that
5265 * its OK to resume normal operation. Implementation resembles the
5266 * second-half of the e1000_resume routine.
5267 */
5268 static void e1000_io_resume(struct pci_dev *pdev)
5269 {
5270 struct net_device *netdev = pci_get_drvdata(pdev);
5271 struct e1000_adapter *adapter = netdev->priv;
5272
5273 e1000_init_manageability(adapter);
5274
5275 if (netif_running(netdev)) {
5276 if (e1000_up(adapter)) {
5277 printk("e1000: can't bring device back up after reset\n");
5278 return;
5279 }
5280 }
5281
5282 netif_device_attach(netdev);
5283
5284 /* If the controller is 82573 and f/w is AMT, do not set
5285 * DRV_LOAD until the interface is up. For all other cases,
5286 * let the f/w know that the h/w is now under the control
5287 * of the driver. */
5288 if (adapter->hw.mac_type != e1000_82573 ||
5289 !e1000_check_mng_mode(&adapter->hw))
5290 e1000_get_hw_control(adapter);
5291
5292 }
5293
5294 /* e1000_main.c */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree