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[deliverable/linux.git] / drivers / net / ethernet / intel / e1000 / e1000_main.c
1 /*******************************************************************************
2
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27 *******************************************************************************/
28
29 #include "e1000.h"
30 #include <net/ip6_checksum.h>
31 #include <linux/io.h>
32 #include <linux/prefetch.h>
33 #include <linux/bitops.h>
34 #include <linux/if_vlan.h>
35
36 char e1000_driver_name[] = "e1000";
37 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
38 #define DRV_VERSION "7.3.21-k8-NAPI"
39 const char e1000_driver_version[] = DRV_VERSION;
40 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
41
42 /* e1000_pci_tbl - PCI Device ID Table
43 *
44 * Last entry must be all 0s
45 *
46 * Macro expands to...
47 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
48 */
49 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
50 INTEL_E1000_ETHERNET_DEVICE(0x1000),
51 INTEL_E1000_ETHERNET_DEVICE(0x1001),
52 INTEL_E1000_ETHERNET_DEVICE(0x1004),
53 INTEL_E1000_ETHERNET_DEVICE(0x1008),
54 INTEL_E1000_ETHERNET_DEVICE(0x1009),
55 INTEL_E1000_ETHERNET_DEVICE(0x100C),
56 INTEL_E1000_ETHERNET_DEVICE(0x100D),
57 INTEL_E1000_ETHERNET_DEVICE(0x100E),
58 INTEL_E1000_ETHERNET_DEVICE(0x100F),
59 INTEL_E1000_ETHERNET_DEVICE(0x1010),
60 INTEL_E1000_ETHERNET_DEVICE(0x1011),
61 INTEL_E1000_ETHERNET_DEVICE(0x1012),
62 INTEL_E1000_ETHERNET_DEVICE(0x1013),
63 INTEL_E1000_ETHERNET_DEVICE(0x1014),
64 INTEL_E1000_ETHERNET_DEVICE(0x1015),
65 INTEL_E1000_ETHERNET_DEVICE(0x1016),
66 INTEL_E1000_ETHERNET_DEVICE(0x1017),
67 INTEL_E1000_ETHERNET_DEVICE(0x1018),
68 INTEL_E1000_ETHERNET_DEVICE(0x1019),
69 INTEL_E1000_ETHERNET_DEVICE(0x101A),
70 INTEL_E1000_ETHERNET_DEVICE(0x101D),
71 INTEL_E1000_ETHERNET_DEVICE(0x101E),
72 INTEL_E1000_ETHERNET_DEVICE(0x1026),
73 INTEL_E1000_ETHERNET_DEVICE(0x1027),
74 INTEL_E1000_ETHERNET_DEVICE(0x1028),
75 INTEL_E1000_ETHERNET_DEVICE(0x1075),
76 INTEL_E1000_ETHERNET_DEVICE(0x1076),
77 INTEL_E1000_ETHERNET_DEVICE(0x1077),
78 INTEL_E1000_ETHERNET_DEVICE(0x1078),
79 INTEL_E1000_ETHERNET_DEVICE(0x1079),
80 INTEL_E1000_ETHERNET_DEVICE(0x107A),
81 INTEL_E1000_ETHERNET_DEVICE(0x107B),
82 INTEL_E1000_ETHERNET_DEVICE(0x107C),
83 INTEL_E1000_ETHERNET_DEVICE(0x108A),
84 INTEL_E1000_ETHERNET_DEVICE(0x1099),
85 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
86 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
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_setup_all_tx_resources(struct e1000_adapter *adapter);
98 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
99 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
100 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
101 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
102 struct e1000_tx_ring *txdr);
103 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
104 struct e1000_rx_ring *rxdr);
105 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
106 struct e1000_tx_ring *tx_ring);
107 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
108 struct e1000_rx_ring *rx_ring);
109 void e1000_update_stats(struct e1000_adapter *adapter);
110
111 static int e1000_init_module(void);
112 static void e1000_exit_module(void);
113 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
114 static void __devexit e1000_remove(struct pci_dev *pdev);
115 static int e1000_alloc_queues(struct e1000_adapter *adapter);
116 static int e1000_sw_init(struct e1000_adapter *adapter);
117 static int e1000_open(struct net_device *netdev);
118 static int e1000_close(struct net_device *netdev);
119 static void e1000_configure_tx(struct e1000_adapter *adapter);
120 static void e1000_configure_rx(struct e1000_adapter *adapter);
121 static void e1000_setup_rctl(struct e1000_adapter *adapter);
122 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
123 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
124 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
125 struct e1000_tx_ring *tx_ring);
126 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
127 struct e1000_rx_ring *rx_ring);
128 static void e1000_set_rx_mode(struct net_device *netdev);
129 static void e1000_update_phy_info_task(struct work_struct *work);
130 static void e1000_watchdog(struct work_struct *work);
131 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
132 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
133 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 bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
139 struct e1000_tx_ring *tx_ring);
140 static int e1000_clean(struct napi_struct *napi, int budget);
141 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
142 struct e1000_rx_ring *rx_ring,
143 int *work_done, int work_to_do);
144 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
145 struct e1000_rx_ring *rx_ring,
146 int *work_done, int work_to_do);
147 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
148 struct e1000_rx_ring *rx_ring,
149 int cleaned_count);
150 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
151 struct e1000_rx_ring *rx_ring,
152 int cleaned_count);
153 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
154 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
155 int cmd);
156 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
157 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
158 static void e1000_tx_timeout(struct net_device *dev);
159 static void e1000_reset_task(struct work_struct *work);
160 static void e1000_smartspeed(struct e1000_adapter *adapter);
161 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
162 struct sk_buff *skb);
163
164 static bool e1000_vlan_used(struct e1000_adapter *adapter);
165 static void e1000_vlan_mode(struct net_device *netdev,
166 netdev_features_t features);
167 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
168 bool filter_on);
169 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
170 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
171 static void e1000_restore_vlan(struct e1000_adapter *adapter);
172
173 #ifdef CONFIG_PM
174 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
175 static int e1000_resume(struct pci_dev *pdev);
176 #endif
177 static void e1000_shutdown(struct pci_dev *pdev);
178
179 #ifdef CONFIG_NET_POLL_CONTROLLER
180 /* for netdump / net console */
181 static void e1000_netpoll (struct net_device *netdev);
182 #endif
183
184 #define COPYBREAK_DEFAULT 256
185 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
186 module_param(copybreak, uint, 0644);
187 MODULE_PARM_DESC(copybreak,
188 "Maximum size of packet that is copied to a new buffer on receive");
189
190 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
191 pci_channel_state_t state);
192 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
193 static void e1000_io_resume(struct pci_dev *pdev);
194
195 static struct pci_error_handlers e1000_err_handler = {
196 .error_detected = e1000_io_error_detected,
197 .slot_reset = e1000_io_slot_reset,
198 .resume = e1000_io_resume,
199 };
200
201 static struct pci_driver e1000_driver = {
202 .name = e1000_driver_name,
203 .id_table = e1000_pci_tbl,
204 .probe = e1000_probe,
205 .remove = __devexit_p(e1000_remove),
206 #ifdef CONFIG_PM
207 /* Power Management Hooks */
208 .suspend = e1000_suspend,
209 .resume = e1000_resume,
210 #endif
211 .shutdown = e1000_shutdown,
212 .err_handler = &e1000_err_handler
213 };
214
215 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
216 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
217 MODULE_LICENSE("GPL");
218 MODULE_VERSION(DRV_VERSION);
219
220 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
221 static int debug = -1;
222 module_param(debug, int, 0);
223 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
224
225 /**
226 * e1000_get_hw_dev - return device
227 * used by hardware layer to print debugging information
228 *
229 **/
230 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
231 {
232 struct e1000_adapter *adapter = hw->back;
233 return adapter->netdev;
234 }
235
236 /**
237 * e1000_init_module - Driver Registration Routine
238 *
239 * e1000_init_module is the first routine called when the driver is
240 * loaded. All it does is register with the PCI subsystem.
241 **/
242
243 static int __init e1000_init_module(void)
244 {
245 int ret;
246 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
247
248 pr_info("%s\n", e1000_copyright);
249
250 ret = pci_register_driver(&e1000_driver);
251 if (copybreak != COPYBREAK_DEFAULT) {
252 if (copybreak == 0)
253 pr_info("copybreak disabled\n");
254 else
255 pr_info("copybreak enabled for "
256 "packets <= %u bytes\n", copybreak);
257 }
258 return ret;
259 }
260
261 module_init(e1000_init_module);
262
263 /**
264 * e1000_exit_module - Driver Exit Cleanup Routine
265 *
266 * e1000_exit_module is called just before the driver is removed
267 * from memory.
268 **/
269
270 static void __exit e1000_exit_module(void)
271 {
272 pci_unregister_driver(&e1000_driver);
273 }
274
275 module_exit(e1000_exit_module);
276
277 static int e1000_request_irq(struct e1000_adapter *adapter)
278 {
279 struct net_device *netdev = adapter->netdev;
280 irq_handler_t handler = e1000_intr;
281 int irq_flags = IRQF_SHARED;
282 int err;
283
284 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
285 netdev);
286 if (err) {
287 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
288 }
289
290 return err;
291 }
292
293 static void e1000_free_irq(struct e1000_adapter *adapter)
294 {
295 struct net_device *netdev = adapter->netdev;
296
297 free_irq(adapter->pdev->irq, netdev);
298 }
299
300 /**
301 * e1000_irq_disable - Mask off interrupt generation on the NIC
302 * @adapter: board private structure
303 **/
304
305 static void e1000_irq_disable(struct e1000_adapter *adapter)
306 {
307 struct e1000_hw *hw = &adapter->hw;
308
309 ew32(IMC, ~0);
310 E1000_WRITE_FLUSH();
311 synchronize_irq(adapter->pdev->irq);
312 }
313
314 /**
315 * e1000_irq_enable - Enable default interrupt generation settings
316 * @adapter: board private structure
317 **/
318
319 static void e1000_irq_enable(struct e1000_adapter *adapter)
320 {
321 struct e1000_hw *hw = &adapter->hw;
322
323 ew32(IMS, IMS_ENABLE_MASK);
324 E1000_WRITE_FLUSH();
325 }
326
327 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
328 {
329 struct e1000_hw *hw = &adapter->hw;
330 struct net_device *netdev = adapter->netdev;
331 u16 vid = hw->mng_cookie.vlan_id;
332 u16 old_vid = adapter->mng_vlan_id;
333
334 if (!e1000_vlan_used(adapter))
335 return;
336
337 if (!test_bit(vid, adapter->active_vlans)) {
338 if (hw->mng_cookie.status &
339 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
340 e1000_vlan_rx_add_vid(netdev, vid);
341 adapter->mng_vlan_id = vid;
342 } else {
343 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
344 }
345 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
346 (vid != old_vid) &&
347 !test_bit(old_vid, adapter->active_vlans))
348 e1000_vlan_rx_kill_vid(netdev, old_vid);
349 } else {
350 adapter->mng_vlan_id = vid;
351 }
352 }
353
354 static void e1000_init_manageability(struct e1000_adapter *adapter)
355 {
356 struct e1000_hw *hw = &adapter->hw;
357
358 if (adapter->en_mng_pt) {
359 u32 manc = er32(MANC);
360
361 /* disable hardware interception of ARP */
362 manc &= ~(E1000_MANC_ARP_EN);
363
364 ew32(MANC, manc);
365 }
366 }
367
368 static void e1000_release_manageability(struct e1000_adapter *adapter)
369 {
370 struct e1000_hw *hw = &adapter->hw;
371
372 if (adapter->en_mng_pt) {
373 u32 manc = er32(MANC);
374
375 /* re-enable hardware interception of ARP */
376 manc |= E1000_MANC_ARP_EN;
377
378 ew32(MANC, manc);
379 }
380 }
381
382 /**
383 * e1000_configure - configure the hardware for RX and TX
384 * @adapter = private board structure
385 **/
386 static void e1000_configure(struct e1000_adapter *adapter)
387 {
388 struct net_device *netdev = adapter->netdev;
389 int i;
390
391 e1000_set_rx_mode(netdev);
392
393 e1000_restore_vlan(adapter);
394 e1000_init_manageability(adapter);
395
396 e1000_configure_tx(adapter);
397 e1000_setup_rctl(adapter);
398 e1000_configure_rx(adapter);
399 /* call E1000_DESC_UNUSED which always leaves
400 * at least 1 descriptor unused to make sure
401 * next_to_use != next_to_clean */
402 for (i = 0; i < adapter->num_rx_queues; i++) {
403 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
404 adapter->alloc_rx_buf(adapter, ring,
405 E1000_DESC_UNUSED(ring));
406 }
407 }
408
409 int e1000_up(struct e1000_adapter *adapter)
410 {
411 struct e1000_hw *hw = &adapter->hw;
412
413 /* hardware has been reset, we need to reload some things */
414 e1000_configure(adapter);
415
416 clear_bit(__E1000_DOWN, &adapter->flags);
417
418 napi_enable(&adapter->napi);
419
420 e1000_irq_enable(adapter);
421
422 netif_wake_queue(adapter->netdev);
423
424 /* fire a link change interrupt to start the watchdog */
425 ew32(ICS, E1000_ICS_LSC);
426 return 0;
427 }
428
429 /**
430 * e1000_power_up_phy - restore link in case the phy was powered down
431 * @adapter: address of board private structure
432 *
433 * The phy may be powered down to save power and turn off link when the
434 * driver is unloaded and wake on lan is not enabled (among others)
435 * *** this routine MUST be followed by a call to e1000_reset ***
436 *
437 **/
438
439 void e1000_power_up_phy(struct e1000_adapter *adapter)
440 {
441 struct e1000_hw *hw = &adapter->hw;
442 u16 mii_reg = 0;
443
444 /* Just clear the power down bit to wake the phy back up */
445 if (hw->media_type == e1000_media_type_copper) {
446 /* according to the manual, the phy will retain its
447 * settings across a power-down/up cycle */
448 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
449 mii_reg &= ~MII_CR_POWER_DOWN;
450 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
451 }
452 }
453
454 static void e1000_power_down_phy(struct e1000_adapter *adapter)
455 {
456 struct e1000_hw *hw = &adapter->hw;
457
458 /* Power down the PHY so no link is implied when interface is down *
459 * The PHY cannot be powered down if any of the following is true *
460 * (a) WoL is enabled
461 * (b) AMT is active
462 * (c) SoL/IDER session is active */
463 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
464 hw->media_type == e1000_media_type_copper) {
465 u16 mii_reg = 0;
466
467 switch (hw->mac_type) {
468 case e1000_82540:
469 case e1000_82545:
470 case e1000_82545_rev_3:
471 case e1000_82546:
472 case e1000_ce4100:
473 case e1000_82546_rev_3:
474 case e1000_82541:
475 case e1000_82541_rev_2:
476 case e1000_82547:
477 case e1000_82547_rev_2:
478 if (er32(MANC) & E1000_MANC_SMBUS_EN)
479 goto out;
480 break;
481 default:
482 goto out;
483 }
484 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
485 mii_reg |= MII_CR_POWER_DOWN;
486 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
487 msleep(1);
488 }
489 out:
490 return;
491 }
492
493 static void e1000_down_and_stop(struct e1000_adapter *adapter)
494 {
495 set_bit(__E1000_DOWN, &adapter->flags);
496 cancel_work_sync(&adapter->reset_task);
497 cancel_delayed_work_sync(&adapter->watchdog_task);
498 cancel_delayed_work_sync(&adapter->phy_info_task);
499 cancel_delayed_work_sync(&adapter->fifo_stall_task);
500 }
501
502 void e1000_down(struct e1000_adapter *adapter)
503 {
504 struct e1000_hw *hw = &adapter->hw;
505 struct net_device *netdev = adapter->netdev;
506 u32 rctl, tctl;
507
508
509 /* disable receives in the hardware */
510 rctl = er32(RCTL);
511 ew32(RCTL, rctl & ~E1000_RCTL_EN);
512 /* flush and sleep below */
513
514 netif_tx_disable(netdev);
515
516 /* disable transmits in the hardware */
517 tctl = er32(TCTL);
518 tctl &= ~E1000_TCTL_EN;
519 ew32(TCTL, tctl);
520 /* flush both disables and wait for them to finish */
521 E1000_WRITE_FLUSH();
522 msleep(10);
523
524 napi_disable(&adapter->napi);
525
526 e1000_irq_disable(adapter);
527
528 /*
529 * Setting DOWN must be after irq_disable to prevent
530 * a screaming interrupt. Setting DOWN also prevents
531 * tasks from rescheduling.
532 */
533 e1000_down_and_stop(adapter);
534
535 adapter->link_speed = 0;
536 adapter->link_duplex = 0;
537 netif_carrier_off(netdev);
538
539 e1000_reset(adapter);
540 e1000_clean_all_tx_rings(adapter);
541 e1000_clean_all_rx_rings(adapter);
542 }
543
544 static void e1000_reinit_safe(struct e1000_adapter *adapter)
545 {
546 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
547 msleep(1);
548 mutex_lock(&adapter->mutex);
549 e1000_down(adapter);
550 e1000_up(adapter);
551 mutex_unlock(&adapter->mutex);
552 clear_bit(__E1000_RESETTING, &adapter->flags);
553 }
554
555 void e1000_reinit_locked(struct e1000_adapter *adapter)
556 {
557 /* if rtnl_lock is not held the call path is bogus */
558 ASSERT_RTNL();
559 WARN_ON(in_interrupt());
560 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
561 msleep(1);
562 e1000_down(adapter);
563 e1000_up(adapter);
564 clear_bit(__E1000_RESETTING, &adapter->flags);
565 }
566
567 void e1000_reset(struct e1000_adapter *adapter)
568 {
569 struct e1000_hw *hw = &adapter->hw;
570 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
571 bool legacy_pba_adjust = false;
572 u16 hwm;
573
574 /* Repartition Pba for greater than 9k mtu
575 * To take effect CTRL.RST is required.
576 */
577
578 switch (hw->mac_type) {
579 case e1000_82542_rev2_0:
580 case e1000_82542_rev2_1:
581 case e1000_82543:
582 case e1000_82544:
583 case e1000_82540:
584 case e1000_82541:
585 case e1000_82541_rev_2:
586 legacy_pba_adjust = true;
587 pba = E1000_PBA_48K;
588 break;
589 case e1000_82545:
590 case e1000_82545_rev_3:
591 case e1000_82546:
592 case e1000_ce4100:
593 case e1000_82546_rev_3:
594 pba = E1000_PBA_48K;
595 break;
596 case e1000_82547:
597 case e1000_82547_rev_2:
598 legacy_pba_adjust = true;
599 pba = E1000_PBA_30K;
600 break;
601 case e1000_undefined:
602 case e1000_num_macs:
603 break;
604 }
605
606 if (legacy_pba_adjust) {
607 if (hw->max_frame_size > E1000_RXBUFFER_8192)
608 pba -= 8; /* allocate more FIFO for Tx */
609
610 if (hw->mac_type == e1000_82547) {
611 adapter->tx_fifo_head = 0;
612 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
613 adapter->tx_fifo_size =
614 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
615 atomic_set(&adapter->tx_fifo_stall, 0);
616 }
617 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
618 /* adjust PBA for jumbo frames */
619 ew32(PBA, pba);
620
621 /* To maintain wire speed transmits, the Tx FIFO should be
622 * large enough to accommodate two full transmit packets,
623 * rounded up to the next 1KB and expressed in KB. Likewise,
624 * the Rx FIFO should be large enough to accommodate at least
625 * one full receive packet and is similarly rounded up and
626 * expressed in KB. */
627 pba = er32(PBA);
628 /* upper 16 bits has Tx packet buffer allocation size in KB */
629 tx_space = pba >> 16;
630 /* lower 16 bits has Rx packet buffer allocation size in KB */
631 pba &= 0xffff;
632 /*
633 * the tx fifo also stores 16 bytes of information about the tx
634 * but don't include ethernet FCS because hardware appends it
635 */
636 min_tx_space = (hw->max_frame_size +
637 sizeof(struct e1000_tx_desc) -
638 ETH_FCS_LEN) * 2;
639 min_tx_space = ALIGN(min_tx_space, 1024);
640 min_tx_space >>= 10;
641 /* software strips receive CRC, so leave room for it */
642 min_rx_space = hw->max_frame_size;
643 min_rx_space = ALIGN(min_rx_space, 1024);
644 min_rx_space >>= 10;
645
646 /* If current Tx allocation is less than the min Tx FIFO size,
647 * and the min Tx FIFO size is less than the current Rx FIFO
648 * allocation, take space away from current Rx allocation */
649 if (tx_space < min_tx_space &&
650 ((min_tx_space - tx_space) < pba)) {
651 pba = pba - (min_tx_space - tx_space);
652
653 /* PCI/PCIx hardware has PBA alignment constraints */
654 switch (hw->mac_type) {
655 case e1000_82545 ... e1000_82546_rev_3:
656 pba &= ~(E1000_PBA_8K - 1);
657 break;
658 default:
659 break;
660 }
661
662 /* if short on rx space, rx wins and must trump tx
663 * adjustment or use Early Receive if available */
664 if (pba < min_rx_space)
665 pba = min_rx_space;
666 }
667 }
668
669 ew32(PBA, pba);
670
671 /*
672 * flow control settings:
673 * The high water mark must be low enough to fit one full frame
674 * (or the size used for early receive) above it in the Rx FIFO.
675 * Set it to the lower of:
676 * - 90% of the Rx FIFO size, and
677 * - the full Rx FIFO size minus the early receive size (for parts
678 * with ERT support assuming ERT set to E1000_ERT_2048), or
679 * - the full Rx FIFO size minus one full frame
680 */
681 hwm = min(((pba << 10) * 9 / 10),
682 ((pba << 10) - hw->max_frame_size));
683
684 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
685 hw->fc_low_water = hw->fc_high_water - 8;
686 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
687 hw->fc_send_xon = 1;
688 hw->fc = hw->original_fc;
689
690 /* Allow time for pending master requests to run */
691 e1000_reset_hw(hw);
692 if (hw->mac_type >= e1000_82544)
693 ew32(WUC, 0);
694
695 if (e1000_init_hw(hw))
696 e_dev_err("Hardware Error\n");
697 e1000_update_mng_vlan(adapter);
698
699 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
700 if (hw->mac_type >= e1000_82544 &&
701 hw->autoneg == 1 &&
702 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
703 u32 ctrl = er32(CTRL);
704 /* clear phy power management bit if we are in gig only mode,
705 * which if enabled will attempt negotiation to 100Mb, which
706 * can cause a loss of link at power off or driver unload */
707 ctrl &= ~E1000_CTRL_SWDPIN3;
708 ew32(CTRL, ctrl);
709 }
710
711 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
712 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
713
714 e1000_reset_adaptive(hw);
715 e1000_phy_get_info(hw, &adapter->phy_info);
716
717 e1000_release_manageability(adapter);
718 }
719
720 /**
721 * Dump the eeprom for users having checksum issues
722 **/
723 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
724 {
725 struct net_device *netdev = adapter->netdev;
726 struct ethtool_eeprom eeprom;
727 const struct ethtool_ops *ops = netdev->ethtool_ops;
728 u8 *data;
729 int i;
730 u16 csum_old, csum_new = 0;
731
732 eeprom.len = ops->get_eeprom_len(netdev);
733 eeprom.offset = 0;
734
735 data = kmalloc(eeprom.len, GFP_KERNEL);
736 if (!data)
737 return;
738
739 ops->get_eeprom(netdev, &eeprom, data);
740
741 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
742 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
743 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
744 csum_new += data[i] + (data[i + 1] << 8);
745 csum_new = EEPROM_SUM - csum_new;
746
747 pr_err("/*********************/\n");
748 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
749 pr_err("Calculated : 0x%04x\n", csum_new);
750
751 pr_err("Offset Values\n");
752 pr_err("======== ======\n");
753 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
754
755 pr_err("Include this output when contacting your support provider.\n");
756 pr_err("This is not a software error! Something bad happened to\n");
757 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
758 pr_err("result in further problems, possibly loss of data,\n");
759 pr_err("corruption or system hangs!\n");
760 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
761 pr_err("which is invalid and requires you to set the proper MAC\n");
762 pr_err("address manually before continuing to enable this network\n");
763 pr_err("device. Please inspect the EEPROM dump and report the\n");
764 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
765 pr_err("/*********************/\n");
766
767 kfree(data);
768 }
769
770 /**
771 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
772 * @pdev: PCI device information struct
773 *
774 * Return true if an adapter needs ioport resources
775 **/
776 static int e1000_is_need_ioport(struct pci_dev *pdev)
777 {
778 switch (pdev->device) {
779 case E1000_DEV_ID_82540EM:
780 case E1000_DEV_ID_82540EM_LOM:
781 case E1000_DEV_ID_82540EP:
782 case E1000_DEV_ID_82540EP_LOM:
783 case E1000_DEV_ID_82540EP_LP:
784 case E1000_DEV_ID_82541EI:
785 case E1000_DEV_ID_82541EI_MOBILE:
786 case E1000_DEV_ID_82541ER:
787 case E1000_DEV_ID_82541ER_LOM:
788 case E1000_DEV_ID_82541GI:
789 case E1000_DEV_ID_82541GI_LF:
790 case E1000_DEV_ID_82541GI_MOBILE:
791 case E1000_DEV_ID_82544EI_COPPER:
792 case E1000_DEV_ID_82544EI_FIBER:
793 case E1000_DEV_ID_82544GC_COPPER:
794 case E1000_DEV_ID_82544GC_LOM:
795 case E1000_DEV_ID_82545EM_COPPER:
796 case E1000_DEV_ID_82545EM_FIBER:
797 case E1000_DEV_ID_82546EB_COPPER:
798 case E1000_DEV_ID_82546EB_FIBER:
799 case E1000_DEV_ID_82546EB_QUAD_COPPER:
800 return true;
801 default:
802 return false;
803 }
804 }
805
806 static netdev_features_t e1000_fix_features(struct net_device *netdev,
807 netdev_features_t features)
808 {
809 /*
810 * Since there is no support for separate rx/tx vlan accel
811 * enable/disable make sure tx flag is always in same state as rx.
812 */
813 if (features & NETIF_F_HW_VLAN_RX)
814 features |= NETIF_F_HW_VLAN_TX;
815 else
816 features &= ~NETIF_F_HW_VLAN_TX;
817
818 return features;
819 }
820
821 static int e1000_set_features(struct net_device *netdev,
822 netdev_features_t features)
823 {
824 struct e1000_adapter *adapter = netdev_priv(netdev);
825 netdev_features_t changed = features ^ netdev->features;
826
827 if (changed & NETIF_F_HW_VLAN_RX)
828 e1000_vlan_mode(netdev, features);
829
830 if (!(changed & NETIF_F_RXCSUM))
831 return 0;
832
833 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
834
835 if (netif_running(netdev))
836 e1000_reinit_locked(adapter);
837 else
838 e1000_reset(adapter);
839
840 return 0;
841 }
842
843 static const struct net_device_ops e1000_netdev_ops = {
844 .ndo_open = e1000_open,
845 .ndo_stop = e1000_close,
846 .ndo_start_xmit = e1000_xmit_frame,
847 .ndo_get_stats = e1000_get_stats,
848 .ndo_set_rx_mode = e1000_set_rx_mode,
849 .ndo_set_mac_address = e1000_set_mac,
850 .ndo_tx_timeout = e1000_tx_timeout,
851 .ndo_change_mtu = e1000_change_mtu,
852 .ndo_do_ioctl = e1000_ioctl,
853 .ndo_validate_addr = eth_validate_addr,
854 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
855 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
856 #ifdef CONFIG_NET_POLL_CONTROLLER
857 .ndo_poll_controller = e1000_netpoll,
858 #endif
859 .ndo_fix_features = e1000_fix_features,
860 .ndo_set_features = e1000_set_features,
861 };
862
863 /**
864 * e1000_init_hw_struct - initialize members of hw struct
865 * @adapter: board private struct
866 * @hw: structure used by e1000_hw.c
867 *
868 * Factors out initialization of the e1000_hw struct to its own function
869 * that can be called very early at init (just after struct allocation).
870 * Fields are initialized based on PCI device information and
871 * OS network device settings (MTU size).
872 * Returns negative error codes if MAC type setup fails.
873 */
874 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
875 struct e1000_hw *hw)
876 {
877 struct pci_dev *pdev = adapter->pdev;
878
879 /* PCI config space info */
880 hw->vendor_id = pdev->vendor;
881 hw->device_id = pdev->device;
882 hw->subsystem_vendor_id = pdev->subsystem_vendor;
883 hw->subsystem_id = pdev->subsystem_device;
884 hw->revision_id = pdev->revision;
885
886 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
887
888 hw->max_frame_size = adapter->netdev->mtu +
889 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
890 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
891
892 /* identify the MAC */
893 if (e1000_set_mac_type(hw)) {
894 e_err(probe, "Unknown MAC Type\n");
895 return -EIO;
896 }
897
898 switch (hw->mac_type) {
899 default:
900 break;
901 case e1000_82541:
902 case e1000_82547:
903 case e1000_82541_rev_2:
904 case e1000_82547_rev_2:
905 hw->phy_init_script = 1;
906 break;
907 }
908
909 e1000_set_media_type(hw);
910 e1000_get_bus_info(hw);
911
912 hw->wait_autoneg_complete = false;
913 hw->tbi_compatibility_en = true;
914 hw->adaptive_ifs = true;
915
916 /* Copper options */
917
918 if (hw->media_type == e1000_media_type_copper) {
919 hw->mdix = AUTO_ALL_MODES;
920 hw->disable_polarity_correction = false;
921 hw->master_slave = E1000_MASTER_SLAVE;
922 }
923
924 return 0;
925 }
926
927 /**
928 * e1000_probe - Device Initialization Routine
929 * @pdev: PCI device information struct
930 * @ent: entry in e1000_pci_tbl
931 *
932 * Returns 0 on success, negative on failure
933 *
934 * e1000_probe initializes an adapter identified by a pci_dev structure.
935 * The OS initialization, configuring of the adapter private structure,
936 * and a hardware reset occur.
937 **/
938 static int __devinit e1000_probe(struct pci_dev *pdev,
939 const struct pci_device_id *ent)
940 {
941 struct net_device *netdev;
942 struct e1000_adapter *adapter;
943 struct e1000_hw *hw;
944
945 static int cards_found = 0;
946 static int global_quad_port_a = 0; /* global ksp3 port a indication */
947 int i, err, pci_using_dac;
948 u16 eeprom_data = 0;
949 u16 tmp = 0;
950 u16 eeprom_apme_mask = E1000_EEPROM_APME;
951 int bars, need_ioport;
952
953 /* do not allocate ioport bars when not needed */
954 need_ioport = e1000_is_need_ioport(pdev);
955 if (need_ioport) {
956 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
957 err = pci_enable_device(pdev);
958 } else {
959 bars = pci_select_bars(pdev, IORESOURCE_MEM);
960 err = pci_enable_device_mem(pdev);
961 }
962 if (err)
963 return err;
964
965 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
966 if (err)
967 goto err_pci_reg;
968
969 pci_set_master(pdev);
970 err = pci_save_state(pdev);
971 if (err)
972 goto err_alloc_etherdev;
973
974 err = -ENOMEM;
975 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
976 if (!netdev)
977 goto err_alloc_etherdev;
978
979 SET_NETDEV_DEV(netdev, &pdev->dev);
980
981 pci_set_drvdata(pdev, netdev);
982 adapter = netdev_priv(netdev);
983 adapter->netdev = netdev;
984 adapter->pdev = pdev;
985 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
986 adapter->bars = bars;
987 adapter->need_ioport = need_ioport;
988
989 hw = &adapter->hw;
990 hw->back = adapter;
991
992 err = -EIO;
993 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
994 if (!hw->hw_addr)
995 goto err_ioremap;
996
997 if (adapter->need_ioport) {
998 for (i = BAR_1; i <= BAR_5; i++) {
999 if (pci_resource_len(pdev, i) == 0)
1000 continue;
1001 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1002 hw->io_base = pci_resource_start(pdev, i);
1003 break;
1004 }
1005 }
1006 }
1007
1008 /* make ready for any if (hw->...) below */
1009 err = e1000_init_hw_struct(adapter, hw);
1010 if (err)
1011 goto err_sw_init;
1012
1013 /*
1014 * there is a workaround being applied below that limits
1015 * 64-bit DMA addresses to 64-bit hardware. There are some
1016 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1017 */
1018 pci_using_dac = 0;
1019 if ((hw->bus_type == e1000_bus_type_pcix) &&
1020 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
1021 /*
1022 * according to DMA-API-HOWTO, coherent calls will always
1023 * succeed if the set call did
1024 */
1025 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
1026 pci_using_dac = 1;
1027 } else {
1028 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1029 if (err) {
1030 pr_err("No usable DMA config, aborting\n");
1031 goto err_dma;
1032 }
1033 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1034 }
1035
1036 netdev->netdev_ops = &e1000_netdev_ops;
1037 e1000_set_ethtool_ops(netdev);
1038 netdev->watchdog_timeo = 5 * HZ;
1039 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1040
1041 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1042
1043 adapter->bd_number = cards_found;
1044
1045 /* setup the private structure */
1046
1047 err = e1000_sw_init(adapter);
1048 if (err)
1049 goto err_sw_init;
1050
1051 err = -EIO;
1052 if (hw->mac_type == e1000_ce4100) {
1053 hw->ce4100_gbe_mdio_base_virt =
1054 ioremap(pci_resource_start(pdev, BAR_1),
1055 pci_resource_len(pdev, BAR_1));
1056
1057 if (!hw->ce4100_gbe_mdio_base_virt)
1058 goto err_mdio_ioremap;
1059 }
1060
1061 if (hw->mac_type >= e1000_82543) {
1062 netdev->hw_features = NETIF_F_SG |
1063 NETIF_F_HW_CSUM |
1064 NETIF_F_HW_VLAN_RX;
1065 netdev->features = NETIF_F_HW_VLAN_TX |
1066 NETIF_F_HW_VLAN_FILTER;
1067 }
1068
1069 if ((hw->mac_type >= e1000_82544) &&
1070 (hw->mac_type != e1000_82547))
1071 netdev->hw_features |= NETIF_F_TSO;
1072
1073 netdev->priv_flags |= IFF_SUPP_NOFCS;
1074
1075 netdev->features |= netdev->hw_features;
1076 netdev->hw_features |= NETIF_F_RXCSUM;
1077 netdev->hw_features |= NETIF_F_RXFCS;
1078
1079 if (pci_using_dac) {
1080 netdev->features |= NETIF_F_HIGHDMA;
1081 netdev->vlan_features |= NETIF_F_HIGHDMA;
1082 }
1083
1084 netdev->vlan_features |= NETIF_F_TSO;
1085 netdev->vlan_features |= NETIF_F_HW_CSUM;
1086 netdev->vlan_features |= NETIF_F_SG;
1087
1088 netdev->priv_flags |= IFF_UNICAST_FLT;
1089
1090 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1091
1092 /* initialize eeprom parameters */
1093 if (e1000_init_eeprom_params(hw)) {
1094 e_err(probe, "EEPROM initialization failed\n");
1095 goto err_eeprom;
1096 }
1097
1098 /* before reading the EEPROM, reset the controller to
1099 * put the device in a known good starting state */
1100
1101 e1000_reset_hw(hw);
1102
1103 /* make sure the EEPROM is good */
1104 if (e1000_validate_eeprom_checksum(hw) < 0) {
1105 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1106 e1000_dump_eeprom(adapter);
1107 /*
1108 * set MAC address to all zeroes to invalidate and temporary
1109 * disable this device for the user. This blocks regular
1110 * traffic while still permitting ethtool ioctls from reaching
1111 * the hardware as well as allowing the user to run the
1112 * interface after manually setting a hw addr using
1113 * `ip set address`
1114 */
1115 memset(hw->mac_addr, 0, netdev->addr_len);
1116 } else {
1117 /* copy the MAC address out of the EEPROM */
1118 if (e1000_read_mac_addr(hw))
1119 e_err(probe, "EEPROM Read Error\n");
1120 }
1121 /* don't block initalization here due to bad MAC address */
1122 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1123 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1124
1125 if (!is_valid_ether_addr(netdev->perm_addr))
1126 e_err(probe, "Invalid MAC Address\n");
1127
1128
1129 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1130 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1131 e1000_82547_tx_fifo_stall_task);
1132 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1133 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1134
1135 e1000_check_options(adapter);
1136
1137 /* Initial Wake on LAN setting
1138 * If APM wake is enabled in the EEPROM,
1139 * enable the ACPI Magic Packet filter
1140 */
1141
1142 switch (hw->mac_type) {
1143 case e1000_82542_rev2_0:
1144 case e1000_82542_rev2_1:
1145 case e1000_82543:
1146 break;
1147 case e1000_82544:
1148 e1000_read_eeprom(hw,
1149 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1150 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1151 break;
1152 case e1000_82546:
1153 case e1000_82546_rev_3:
1154 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1155 e1000_read_eeprom(hw,
1156 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1157 break;
1158 }
1159 /* Fall Through */
1160 default:
1161 e1000_read_eeprom(hw,
1162 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1163 break;
1164 }
1165 if (eeprom_data & eeprom_apme_mask)
1166 adapter->eeprom_wol |= E1000_WUFC_MAG;
1167
1168 /* now that we have the eeprom settings, apply the special cases
1169 * where the eeprom may be wrong or the board simply won't support
1170 * wake on lan on a particular port */
1171 switch (pdev->device) {
1172 case E1000_DEV_ID_82546GB_PCIE:
1173 adapter->eeprom_wol = 0;
1174 break;
1175 case E1000_DEV_ID_82546EB_FIBER:
1176 case E1000_DEV_ID_82546GB_FIBER:
1177 /* Wake events only supported on port A for dual fiber
1178 * regardless of eeprom setting */
1179 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1180 adapter->eeprom_wol = 0;
1181 break;
1182 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1183 /* if quad port adapter, disable WoL on all but port A */
1184 if (global_quad_port_a != 0)
1185 adapter->eeprom_wol = 0;
1186 else
1187 adapter->quad_port_a = true;
1188 /* Reset for multiple quad port adapters */
1189 if (++global_quad_port_a == 4)
1190 global_quad_port_a = 0;
1191 break;
1192 }
1193
1194 /* initialize the wol settings based on the eeprom settings */
1195 adapter->wol = adapter->eeprom_wol;
1196 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1197
1198 /* Auto detect PHY address */
1199 if (hw->mac_type == e1000_ce4100) {
1200 for (i = 0; i < 32; i++) {
1201 hw->phy_addr = i;
1202 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1203 if (tmp == 0 || tmp == 0xFF) {
1204 if (i == 31)
1205 goto err_eeprom;
1206 continue;
1207 } else
1208 break;
1209 }
1210 }
1211
1212 /* reset the hardware with the new settings */
1213 e1000_reset(adapter);
1214
1215 strcpy(netdev->name, "eth%d");
1216 err = register_netdev(netdev);
1217 if (err)
1218 goto err_register;
1219
1220 e1000_vlan_filter_on_off(adapter, false);
1221
1222 /* print bus type/speed/width info */
1223 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1224 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1225 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1226 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1227 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1228 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1229 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1230 netdev->dev_addr);
1231
1232 /* carrier off reporting is important to ethtool even BEFORE open */
1233 netif_carrier_off(netdev);
1234
1235 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1236
1237 cards_found++;
1238 return 0;
1239
1240 err_register:
1241 err_eeprom:
1242 e1000_phy_hw_reset(hw);
1243
1244 if (hw->flash_address)
1245 iounmap(hw->flash_address);
1246 kfree(adapter->tx_ring);
1247 kfree(adapter->rx_ring);
1248 err_dma:
1249 err_sw_init:
1250 err_mdio_ioremap:
1251 iounmap(hw->ce4100_gbe_mdio_base_virt);
1252 iounmap(hw->hw_addr);
1253 err_ioremap:
1254 free_netdev(netdev);
1255 err_alloc_etherdev:
1256 pci_release_selected_regions(pdev, bars);
1257 err_pci_reg:
1258 pci_disable_device(pdev);
1259 return err;
1260 }
1261
1262 /**
1263 * e1000_remove - Device Removal Routine
1264 * @pdev: PCI device information struct
1265 *
1266 * e1000_remove is called by the PCI subsystem to alert the driver
1267 * that it should release a PCI device. The could be caused by a
1268 * Hot-Plug event, or because the driver is going to be removed from
1269 * memory.
1270 **/
1271
1272 static void __devexit e1000_remove(struct pci_dev *pdev)
1273 {
1274 struct net_device *netdev = pci_get_drvdata(pdev);
1275 struct e1000_adapter *adapter = netdev_priv(netdev);
1276 struct e1000_hw *hw = &adapter->hw;
1277
1278 e1000_down_and_stop(adapter);
1279 e1000_release_manageability(adapter);
1280
1281 unregister_netdev(netdev);
1282
1283 e1000_phy_hw_reset(hw);
1284
1285 kfree(adapter->tx_ring);
1286 kfree(adapter->rx_ring);
1287
1288 if (hw->mac_type == e1000_ce4100)
1289 iounmap(hw->ce4100_gbe_mdio_base_virt);
1290 iounmap(hw->hw_addr);
1291 if (hw->flash_address)
1292 iounmap(hw->flash_address);
1293 pci_release_selected_regions(pdev, adapter->bars);
1294
1295 free_netdev(netdev);
1296
1297 pci_disable_device(pdev);
1298 }
1299
1300 /**
1301 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1302 * @adapter: board private structure to initialize
1303 *
1304 * e1000_sw_init initializes the Adapter private data structure.
1305 * e1000_init_hw_struct MUST be called before this function
1306 **/
1307
1308 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1309 {
1310 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1311
1312 adapter->num_tx_queues = 1;
1313 adapter->num_rx_queues = 1;
1314
1315 if (e1000_alloc_queues(adapter)) {
1316 e_err(probe, "Unable to allocate memory for queues\n");
1317 return -ENOMEM;
1318 }
1319
1320 /* Explicitly disable IRQ since the NIC can be in any state. */
1321 e1000_irq_disable(adapter);
1322
1323 spin_lock_init(&adapter->stats_lock);
1324 mutex_init(&adapter->mutex);
1325
1326 set_bit(__E1000_DOWN, &adapter->flags);
1327
1328 return 0;
1329 }
1330
1331 /**
1332 * e1000_alloc_queues - Allocate memory for all rings
1333 * @adapter: board private structure to initialize
1334 *
1335 * We allocate one ring per queue at run-time since we don't know the
1336 * number of queues at compile-time.
1337 **/
1338
1339 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1340 {
1341 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1342 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1343 if (!adapter->tx_ring)
1344 return -ENOMEM;
1345
1346 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1347 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1348 if (!adapter->rx_ring) {
1349 kfree(adapter->tx_ring);
1350 return -ENOMEM;
1351 }
1352
1353 return E1000_SUCCESS;
1354 }
1355
1356 /**
1357 * e1000_open - Called when a network interface is made active
1358 * @netdev: network interface device structure
1359 *
1360 * Returns 0 on success, negative value on failure
1361 *
1362 * The open entry point is called when a network interface is made
1363 * active by the system (IFF_UP). At this point all resources needed
1364 * for transmit and receive operations are allocated, the interrupt
1365 * handler is registered with the OS, the watchdog task is started,
1366 * and the stack is notified that the interface is ready.
1367 **/
1368
1369 static int e1000_open(struct net_device *netdev)
1370 {
1371 struct e1000_adapter *adapter = netdev_priv(netdev);
1372 struct e1000_hw *hw = &adapter->hw;
1373 int err;
1374
1375 /* disallow open during test */
1376 if (test_bit(__E1000_TESTING, &adapter->flags))
1377 return -EBUSY;
1378
1379 netif_carrier_off(netdev);
1380
1381 /* allocate transmit descriptors */
1382 err = e1000_setup_all_tx_resources(adapter);
1383 if (err)
1384 goto err_setup_tx;
1385
1386 /* allocate receive descriptors */
1387 err = e1000_setup_all_rx_resources(adapter);
1388 if (err)
1389 goto err_setup_rx;
1390
1391 e1000_power_up_phy(adapter);
1392
1393 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1394 if ((hw->mng_cookie.status &
1395 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1396 e1000_update_mng_vlan(adapter);
1397 }
1398
1399 /* before we allocate an interrupt, we must be ready to handle it.
1400 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1401 * as soon as we call pci_request_irq, so we have to setup our
1402 * clean_rx handler before we do so. */
1403 e1000_configure(adapter);
1404
1405 err = e1000_request_irq(adapter);
1406 if (err)
1407 goto err_req_irq;
1408
1409 /* From here on the code is the same as e1000_up() */
1410 clear_bit(__E1000_DOWN, &adapter->flags);
1411
1412 napi_enable(&adapter->napi);
1413
1414 e1000_irq_enable(adapter);
1415
1416 netif_start_queue(netdev);
1417
1418 /* fire a link status change interrupt to start the watchdog */
1419 ew32(ICS, E1000_ICS_LSC);
1420
1421 return E1000_SUCCESS;
1422
1423 err_req_irq:
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 e1000_close(struct net_device *netdev)
1447 {
1448 struct e1000_adapter *adapter = netdev_priv(netdev);
1449 struct e1000_hw *hw = &adapter->hw;
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 ((hw->mng_cookie.status &
1462 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1463 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1464 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1465 }
1466
1467 return 0;
1468 }
1469
1470 /**
1471 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1472 * @adapter: address of board private structure
1473 * @start: address of beginning of memory
1474 * @len: length of memory
1475 **/
1476 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1477 unsigned long len)
1478 {
1479 struct e1000_hw *hw = &adapter->hw;
1480 unsigned long begin = (unsigned long)start;
1481 unsigned long end = begin + len;
1482
1483 /* First rev 82545 and 82546 need to not allow any memory
1484 * write location to cross 64k boundary due to errata 23 */
1485 if (hw->mac_type == e1000_82545 ||
1486 hw->mac_type == e1000_ce4100 ||
1487 hw->mac_type == e1000_82546) {
1488 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1489 }
1490
1491 return true;
1492 }
1493
1494 /**
1495 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1496 * @adapter: board private structure
1497 * @txdr: tx descriptor ring (for a specific queue) to setup
1498 *
1499 * Return 0 on success, negative on failure
1500 **/
1501
1502 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1503 struct e1000_tx_ring *txdr)
1504 {
1505 struct pci_dev *pdev = adapter->pdev;
1506 int size;
1507
1508 size = sizeof(struct e1000_buffer) * txdr->count;
1509 txdr->buffer_info = vzalloc(size);
1510 if (!txdr->buffer_info) {
1511 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1512 "ring\n");
1513 return -ENOMEM;
1514 }
1515
1516 /* round up to nearest 4K */
1517
1518 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1519 txdr->size = ALIGN(txdr->size, 4096);
1520
1521 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1522 GFP_KERNEL);
1523 if (!txdr->desc) {
1524 setup_tx_desc_die:
1525 vfree(txdr->buffer_info);
1526 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1527 "ring\n");
1528 return -ENOMEM;
1529 }
1530
1531 /* Fix for errata 23, can't cross 64kB boundary */
1532 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1533 void *olddesc = txdr->desc;
1534 dma_addr_t olddma = txdr->dma;
1535 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1536 txdr->size, txdr->desc);
1537 /* Try again, without freeing the previous */
1538 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1539 &txdr->dma, GFP_KERNEL);
1540 /* Failed allocation, critical failure */
1541 if (!txdr->desc) {
1542 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1543 olddma);
1544 goto setup_tx_desc_die;
1545 }
1546
1547 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1548 /* give up */
1549 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1550 txdr->dma);
1551 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1552 olddma);
1553 e_err(probe, "Unable to allocate aligned memory "
1554 "for the transmit descriptor ring\n");
1555 vfree(txdr->buffer_info);
1556 return -ENOMEM;
1557 } else {
1558 /* Free old allocation, new allocation was successful */
1559 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1560 olddma);
1561 }
1562 }
1563 memset(txdr->desc, 0, txdr->size);
1564
1565 txdr->next_to_use = 0;
1566 txdr->next_to_clean = 0;
1567
1568 return 0;
1569 }
1570
1571 /**
1572 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1573 * (Descriptors) for all queues
1574 * @adapter: board private structure
1575 *
1576 * Return 0 on success, negative on failure
1577 **/
1578
1579 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1580 {
1581 int i, err = 0;
1582
1583 for (i = 0; i < adapter->num_tx_queues; i++) {
1584 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1585 if (err) {
1586 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1587 for (i-- ; i >= 0; i--)
1588 e1000_free_tx_resources(adapter,
1589 &adapter->tx_ring[i]);
1590 break;
1591 }
1592 }
1593
1594 return err;
1595 }
1596
1597 /**
1598 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1599 * @adapter: board private structure
1600 *
1601 * Configure the Tx unit of the MAC after a reset.
1602 **/
1603
1604 static void e1000_configure_tx(struct e1000_adapter *adapter)
1605 {
1606 u64 tdba;
1607 struct e1000_hw *hw = &adapter->hw;
1608 u32 tdlen, tctl, tipg;
1609 u32 ipgr1, ipgr2;
1610
1611 /* Setup the HW Tx Head and Tail descriptor pointers */
1612
1613 switch (adapter->num_tx_queues) {
1614 case 1:
1615 default:
1616 tdba = adapter->tx_ring[0].dma;
1617 tdlen = adapter->tx_ring[0].count *
1618 sizeof(struct e1000_tx_desc);
1619 ew32(TDLEN, tdlen);
1620 ew32(TDBAH, (tdba >> 32));
1621 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1622 ew32(TDT, 0);
1623 ew32(TDH, 0);
1624 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1625 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1626 break;
1627 }
1628
1629 /* Set the default values for the Tx Inter Packet Gap timer */
1630 if ((hw->media_type == e1000_media_type_fiber ||
1631 hw->media_type == e1000_media_type_internal_serdes))
1632 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1633 else
1634 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1635
1636 switch (hw->mac_type) {
1637 case e1000_82542_rev2_0:
1638 case e1000_82542_rev2_1:
1639 tipg = DEFAULT_82542_TIPG_IPGT;
1640 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1641 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1642 break;
1643 default:
1644 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1645 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1646 break;
1647 }
1648 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1649 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1650 ew32(TIPG, tipg);
1651
1652 /* Set the Tx Interrupt Delay register */
1653
1654 ew32(TIDV, adapter->tx_int_delay);
1655 if (hw->mac_type >= e1000_82540)
1656 ew32(TADV, adapter->tx_abs_int_delay);
1657
1658 /* Program the Transmit Control Register */
1659
1660 tctl = er32(TCTL);
1661 tctl &= ~E1000_TCTL_CT;
1662 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1663 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1664
1665 e1000_config_collision_dist(hw);
1666
1667 /* Setup Transmit Descriptor Settings for eop descriptor */
1668 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1669
1670 /* only set IDE if we are delaying interrupts using the timers */
1671 if (adapter->tx_int_delay)
1672 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1673
1674 if (hw->mac_type < e1000_82543)
1675 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1676 else
1677 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1678
1679 /* Cache if we're 82544 running in PCI-X because we'll
1680 * need this to apply a workaround later in the send path. */
1681 if (hw->mac_type == e1000_82544 &&
1682 hw->bus_type == e1000_bus_type_pcix)
1683 adapter->pcix_82544 = true;
1684
1685 ew32(TCTL, tctl);
1686
1687 }
1688
1689 /**
1690 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1691 * @adapter: board private structure
1692 * @rxdr: rx descriptor ring (for a specific queue) to setup
1693 *
1694 * Returns 0 on success, negative on failure
1695 **/
1696
1697 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1698 struct e1000_rx_ring *rxdr)
1699 {
1700 struct pci_dev *pdev = adapter->pdev;
1701 int size, desc_len;
1702
1703 size = sizeof(struct e1000_buffer) * rxdr->count;
1704 rxdr->buffer_info = vzalloc(size);
1705 if (!rxdr->buffer_info) {
1706 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1707 "ring\n");
1708 return -ENOMEM;
1709 }
1710
1711 desc_len = sizeof(struct e1000_rx_desc);
1712
1713 /* Round up to nearest 4K */
1714
1715 rxdr->size = rxdr->count * desc_len;
1716 rxdr->size = ALIGN(rxdr->size, 4096);
1717
1718 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1719 GFP_KERNEL);
1720
1721 if (!rxdr->desc) {
1722 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1723 "ring\n");
1724 setup_rx_desc_die:
1725 vfree(rxdr->buffer_info);
1726 return -ENOMEM;
1727 }
1728
1729 /* Fix for errata 23, can't cross 64kB boundary */
1730 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1731 void *olddesc = rxdr->desc;
1732 dma_addr_t olddma = rxdr->dma;
1733 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1734 rxdr->size, rxdr->desc);
1735 /* Try again, without freeing the previous */
1736 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1737 &rxdr->dma, GFP_KERNEL);
1738 /* Failed allocation, critical failure */
1739 if (!rxdr->desc) {
1740 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1741 olddma);
1742 e_err(probe, "Unable to allocate memory for the Rx "
1743 "descriptor ring\n");
1744 goto setup_rx_desc_die;
1745 }
1746
1747 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1748 /* give up */
1749 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1750 rxdr->dma);
1751 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1752 olddma);
1753 e_err(probe, "Unable to allocate aligned memory for "
1754 "the Rx descriptor ring\n");
1755 goto setup_rx_desc_die;
1756 } else {
1757 /* Free old allocation, new allocation was successful */
1758 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1759 olddma);
1760 }
1761 }
1762 memset(rxdr->desc, 0, rxdr->size);
1763
1764 rxdr->next_to_clean = 0;
1765 rxdr->next_to_use = 0;
1766 rxdr->rx_skb_top = NULL;
1767
1768 return 0;
1769 }
1770
1771 /**
1772 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1773 * (Descriptors) for all queues
1774 * @adapter: board private structure
1775 *
1776 * Return 0 on success, negative on failure
1777 **/
1778
1779 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1780 {
1781 int i, err = 0;
1782
1783 for (i = 0; i < adapter->num_rx_queues; i++) {
1784 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1785 if (err) {
1786 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1787 for (i-- ; i >= 0; i--)
1788 e1000_free_rx_resources(adapter,
1789 &adapter->rx_ring[i]);
1790 break;
1791 }
1792 }
1793
1794 return err;
1795 }
1796
1797 /**
1798 * e1000_setup_rctl - configure the receive control registers
1799 * @adapter: Board private structure
1800 **/
1801 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1802 {
1803 struct e1000_hw *hw = &adapter->hw;
1804 u32 rctl;
1805
1806 rctl = er32(RCTL);
1807
1808 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1809
1810 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1811 E1000_RCTL_RDMTS_HALF |
1812 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1813
1814 if (hw->tbi_compatibility_on == 1)
1815 rctl |= E1000_RCTL_SBP;
1816 else
1817 rctl &= ~E1000_RCTL_SBP;
1818
1819 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1820 rctl &= ~E1000_RCTL_LPE;
1821 else
1822 rctl |= E1000_RCTL_LPE;
1823
1824 /* Setup buffer sizes */
1825 rctl &= ~E1000_RCTL_SZ_4096;
1826 rctl |= E1000_RCTL_BSEX;
1827 switch (adapter->rx_buffer_len) {
1828 case E1000_RXBUFFER_2048:
1829 default:
1830 rctl |= E1000_RCTL_SZ_2048;
1831 rctl &= ~E1000_RCTL_BSEX;
1832 break;
1833 case E1000_RXBUFFER_4096:
1834 rctl |= E1000_RCTL_SZ_4096;
1835 break;
1836 case E1000_RXBUFFER_8192:
1837 rctl |= E1000_RCTL_SZ_8192;
1838 break;
1839 case E1000_RXBUFFER_16384:
1840 rctl |= E1000_RCTL_SZ_16384;
1841 break;
1842 }
1843
1844 ew32(RCTL, rctl);
1845 }
1846
1847 /**
1848 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1849 * @adapter: board private structure
1850 *
1851 * Configure the Rx unit of the MAC after a reset.
1852 **/
1853
1854 static void e1000_configure_rx(struct e1000_adapter *adapter)
1855 {
1856 u64 rdba;
1857 struct e1000_hw *hw = &adapter->hw;
1858 u32 rdlen, rctl, rxcsum;
1859
1860 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1861 rdlen = adapter->rx_ring[0].count *
1862 sizeof(struct e1000_rx_desc);
1863 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1864 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1865 } else {
1866 rdlen = adapter->rx_ring[0].count *
1867 sizeof(struct e1000_rx_desc);
1868 adapter->clean_rx = e1000_clean_rx_irq;
1869 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1870 }
1871
1872 /* disable receives while setting up the descriptors */
1873 rctl = er32(RCTL);
1874 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1875
1876 /* set the Receive Delay Timer Register */
1877 ew32(RDTR, adapter->rx_int_delay);
1878
1879 if (hw->mac_type >= e1000_82540) {
1880 ew32(RADV, adapter->rx_abs_int_delay);
1881 if (adapter->itr_setting != 0)
1882 ew32(ITR, 1000000000 / (adapter->itr * 256));
1883 }
1884
1885 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1886 * the Base and Length of the Rx Descriptor Ring */
1887 switch (adapter->num_rx_queues) {
1888 case 1:
1889 default:
1890 rdba = adapter->rx_ring[0].dma;
1891 ew32(RDLEN, rdlen);
1892 ew32(RDBAH, (rdba >> 32));
1893 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1894 ew32(RDT, 0);
1895 ew32(RDH, 0);
1896 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1897 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1898 break;
1899 }
1900
1901 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1902 if (hw->mac_type >= e1000_82543) {
1903 rxcsum = er32(RXCSUM);
1904 if (adapter->rx_csum)
1905 rxcsum |= E1000_RXCSUM_TUOFL;
1906 else
1907 /* don't need to clear IPPCSE as it defaults to 0 */
1908 rxcsum &= ~E1000_RXCSUM_TUOFL;
1909 ew32(RXCSUM, rxcsum);
1910 }
1911
1912 /* Enable Receives */
1913 ew32(RCTL, rctl | E1000_RCTL_EN);
1914 }
1915
1916 /**
1917 * e1000_free_tx_resources - Free Tx Resources per Queue
1918 * @adapter: board private structure
1919 * @tx_ring: Tx descriptor ring for a specific queue
1920 *
1921 * Free all transmit software resources
1922 **/
1923
1924 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1925 struct e1000_tx_ring *tx_ring)
1926 {
1927 struct pci_dev *pdev = adapter->pdev;
1928
1929 e1000_clean_tx_ring(adapter, tx_ring);
1930
1931 vfree(tx_ring->buffer_info);
1932 tx_ring->buffer_info = NULL;
1933
1934 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1935 tx_ring->dma);
1936
1937 tx_ring->desc = NULL;
1938 }
1939
1940 /**
1941 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1942 * @adapter: board private structure
1943 *
1944 * Free all transmit software resources
1945 **/
1946
1947 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1948 {
1949 int i;
1950
1951 for (i = 0; i < adapter->num_tx_queues; i++)
1952 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1953 }
1954
1955 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1956 struct e1000_buffer *buffer_info)
1957 {
1958 if (buffer_info->dma) {
1959 if (buffer_info->mapped_as_page)
1960 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1961 buffer_info->length, DMA_TO_DEVICE);
1962 else
1963 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1964 buffer_info->length,
1965 DMA_TO_DEVICE);
1966 buffer_info->dma = 0;
1967 }
1968 if (buffer_info->skb) {
1969 dev_kfree_skb_any(buffer_info->skb);
1970 buffer_info->skb = NULL;
1971 }
1972 buffer_info->time_stamp = 0;
1973 /* buffer_info must be completely set up in the transmit path */
1974 }
1975
1976 /**
1977 * e1000_clean_tx_ring - Free Tx Buffers
1978 * @adapter: board private structure
1979 * @tx_ring: ring to be cleaned
1980 **/
1981
1982 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1983 struct e1000_tx_ring *tx_ring)
1984 {
1985 struct e1000_hw *hw = &adapter->hw;
1986 struct e1000_buffer *buffer_info;
1987 unsigned long size;
1988 unsigned int i;
1989
1990 /* Free all the Tx ring sk_buffs */
1991
1992 for (i = 0; i < tx_ring->count; i++) {
1993 buffer_info = &tx_ring->buffer_info[i];
1994 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1995 }
1996
1997 size = sizeof(struct e1000_buffer) * tx_ring->count;
1998 memset(tx_ring->buffer_info, 0, size);
1999
2000 /* Zero out the descriptor ring */
2001
2002 memset(tx_ring->desc, 0, tx_ring->size);
2003
2004 tx_ring->next_to_use = 0;
2005 tx_ring->next_to_clean = 0;
2006 tx_ring->last_tx_tso = false;
2007
2008 writel(0, hw->hw_addr + tx_ring->tdh);
2009 writel(0, hw->hw_addr + tx_ring->tdt);
2010 }
2011
2012 /**
2013 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2014 * @adapter: board private structure
2015 **/
2016
2017 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2018 {
2019 int i;
2020
2021 for (i = 0; i < adapter->num_tx_queues; i++)
2022 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2023 }
2024
2025 /**
2026 * e1000_free_rx_resources - Free Rx Resources
2027 * @adapter: board private structure
2028 * @rx_ring: ring to clean the resources from
2029 *
2030 * Free all receive software resources
2031 **/
2032
2033 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2034 struct e1000_rx_ring *rx_ring)
2035 {
2036 struct pci_dev *pdev = adapter->pdev;
2037
2038 e1000_clean_rx_ring(adapter, rx_ring);
2039
2040 vfree(rx_ring->buffer_info);
2041 rx_ring->buffer_info = NULL;
2042
2043 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2044 rx_ring->dma);
2045
2046 rx_ring->desc = NULL;
2047 }
2048
2049 /**
2050 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2051 * @adapter: board private structure
2052 *
2053 * Free all receive software resources
2054 **/
2055
2056 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2057 {
2058 int i;
2059
2060 for (i = 0; i < adapter->num_rx_queues; i++)
2061 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2062 }
2063
2064 /**
2065 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2066 * @adapter: board private structure
2067 * @rx_ring: ring to free buffers from
2068 **/
2069
2070 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2071 struct e1000_rx_ring *rx_ring)
2072 {
2073 struct e1000_hw *hw = &adapter->hw;
2074 struct e1000_buffer *buffer_info;
2075 struct pci_dev *pdev = adapter->pdev;
2076 unsigned long size;
2077 unsigned int i;
2078
2079 /* Free all the Rx ring sk_buffs */
2080 for (i = 0; i < rx_ring->count; i++) {
2081 buffer_info = &rx_ring->buffer_info[i];
2082 if (buffer_info->dma &&
2083 adapter->clean_rx == e1000_clean_rx_irq) {
2084 dma_unmap_single(&pdev->dev, buffer_info->dma,
2085 buffer_info->length,
2086 DMA_FROM_DEVICE);
2087 } else if (buffer_info->dma &&
2088 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2089 dma_unmap_page(&pdev->dev, buffer_info->dma,
2090 buffer_info->length,
2091 DMA_FROM_DEVICE);
2092 }
2093
2094 buffer_info->dma = 0;
2095 if (buffer_info->page) {
2096 put_page(buffer_info->page);
2097 buffer_info->page = NULL;
2098 }
2099 if (buffer_info->skb) {
2100 dev_kfree_skb(buffer_info->skb);
2101 buffer_info->skb = NULL;
2102 }
2103 }
2104
2105 /* there also may be some cached data from a chained receive */
2106 if (rx_ring->rx_skb_top) {
2107 dev_kfree_skb(rx_ring->rx_skb_top);
2108 rx_ring->rx_skb_top = NULL;
2109 }
2110
2111 size = sizeof(struct e1000_buffer) * rx_ring->count;
2112 memset(rx_ring->buffer_info, 0, size);
2113
2114 /* Zero out the descriptor ring */
2115 memset(rx_ring->desc, 0, rx_ring->size);
2116
2117 rx_ring->next_to_clean = 0;
2118 rx_ring->next_to_use = 0;
2119
2120 writel(0, hw->hw_addr + rx_ring->rdh);
2121 writel(0, hw->hw_addr + rx_ring->rdt);
2122 }
2123
2124 /**
2125 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2126 * @adapter: board private structure
2127 **/
2128
2129 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2130 {
2131 int i;
2132
2133 for (i = 0; i < adapter->num_rx_queues; i++)
2134 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2135 }
2136
2137 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2138 * and memory write and invalidate disabled for certain operations
2139 */
2140 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2141 {
2142 struct e1000_hw *hw = &adapter->hw;
2143 struct net_device *netdev = adapter->netdev;
2144 u32 rctl;
2145
2146 e1000_pci_clear_mwi(hw);
2147
2148 rctl = er32(RCTL);
2149 rctl |= E1000_RCTL_RST;
2150 ew32(RCTL, rctl);
2151 E1000_WRITE_FLUSH();
2152 mdelay(5);
2153
2154 if (netif_running(netdev))
2155 e1000_clean_all_rx_rings(adapter);
2156 }
2157
2158 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2159 {
2160 struct e1000_hw *hw = &adapter->hw;
2161 struct net_device *netdev = adapter->netdev;
2162 u32 rctl;
2163
2164 rctl = er32(RCTL);
2165 rctl &= ~E1000_RCTL_RST;
2166 ew32(RCTL, rctl);
2167 E1000_WRITE_FLUSH();
2168 mdelay(5);
2169
2170 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2171 e1000_pci_set_mwi(hw);
2172
2173 if (netif_running(netdev)) {
2174 /* No need to loop, because 82542 supports only 1 queue */
2175 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2176 e1000_configure_rx(adapter);
2177 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2178 }
2179 }
2180
2181 /**
2182 * e1000_set_mac - Change the Ethernet Address of the NIC
2183 * @netdev: network interface device structure
2184 * @p: pointer to an address structure
2185 *
2186 * Returns 0 on success, negative on failure
2187 **/
2188
2189 static int e1000_set_mac(struct net_device *netdev, void *p)
2190 {
2191 struct e1000_adapter *adapter = netdev_priv(netdev);
2192 struct e1000_hw *hw = &adapter->hw;
2193 struct sockaddr *addr = p;
2194
2195 if (!is_valid_ether_addr(addr->sa_data))
2196 return -EADDRNOTAVAIL;
2197
2198 /* 82542 2.0 needs to be in reset to write receive address registers */
2199
2200 if (hw->mac_type == e1000_82542_rev2_0)
2201 e1000_enter_82542_rst(adapter);
2202
2203 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2204 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2205
2206 e1000_rar_set(hw, hw->mac_addr, 0);
2207
2208 if (hw->mac_type == e1000_82542_rev2_0)
2209 e1000_leave_82542_rst(adapter);
2210
2211 return 0;
2212 }
2213
2214 /**
2215 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2216 * @netdev: network interface device structure
2217 *
2218 * The set_rx_mode entry point is called whenever the unicast or multicast
2219 * address lists or the network interface flags are updated. This routine is
2220 * responsible for configuring the hardware for proper unicast, multicast,
2221 * promiscuous mode, and all-multi behavior.
2222 **/
2223
2224 static void e1000_set_rx_mode(struct net_device *netdev)
2225 {
2226 struct e1000_adapter *adapter = netdev_priv(netdev);
2227 struct e1000_hw *hw = &adapter->hw;
2228 struct netdev_hw_addr *ha;
2229 bool use_uc = false;
2230 u32 rctl;
2231 u32 hash_value;
2232 int i, rar_entries = E1000_RAR_ENTRIES;
2233 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2234 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2235
2236 if (!mcarray) {
2237 e_err(probe, "memory allocation failed\n");
2238 return;
2239 }
2240
2241 /* Check for Promiscuous and All Multicast modes */
2242
2243 rctl = er32(RCTL);
2244
2245 if (netdev->flags & IFF_PROMISC) {
2246 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2247 rctl &= ~E1000_RCTL_VFE;
2248 } else {
2249 if (netdev->flags & IFF_ALLMULTI)
2250 rctl |= E1000_RCTL_MPE;
2251 else
2252 rctl &= ~E1000_RCTL_MPE;
2253 /* Enable VLAN filter if there is a VLAN */
2254 if (e1000_vlan_used(adapter))
2255 rctl |= E1000_RCTL_VFE;
2256 }
2257
2258 if (netdev_uc_count(netdev) > rar_entries - 1) {
2259 rctl |= E1000_RCTL_UPE;
2260 } else if (!(netdev->flags & IFF_PROMISC)) {
2261 rctl &= ~E1000_RCTL_UPE;
2262 use_uc = true;
2263 }
2264
2265 ew32(RCTL, rctl);
2266
2267 /* 82542 2.0 needs to be in reset to write receive address registers */
2268
2269 if (hw->mac_type == e1000_82542_rev2_0)
2270 e1000_enter_82542_rst(adapter);
2271
2272 /* load the first 14 addresses into the exact filters 1-14. Unicast
2273 * addresses take precedence to avoid disabling unicast filtering
2274 * when possible.
2275 *
2276 * RAR 0 is used for the station MAC address
2277 * if there are not 14 addresses, go ahead and clear the filters
2278 */
2279 i = 1;
2280 if (use_uc)
2281 netdev_for_each_uc_addr(ha, netdev) {
2282 if (i == rar_entries)
2283 break;
2284 e1000_rar_set(hw, ha->addr, i++);
2285 }
2286
2287 netdev_for_each_mc_addr(ha, netdev) {
2288 if (i == rar_entries) {
2289 /* load any remaining addresses into the hash table */
2290 u32 hash_reg, hash_bit, mta;
2291 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2292 hash_reg = (hash_value >> 5) & 0x7F;
2293 hash_bit = hash_value & 0x1F;
2294 mta = (1 << hash_bit);
2295 mcarray[hash_reg] |= mta;
2296 } else {
2297 e1000_rar_set(hw, ha->addr, i++);
2298 }
2299 }
2300
2301 for (; i < rar_entries; i++) {
2302 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2303 E1000_WRITE_FLUSH();
2304 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2305 E1000_WRITE_FLUSH();
2306 }
2307
2308 /* write the hash table completely, write from bottom to avoid
2309 * both stupid write combining chipsets, and flushing each write */
2310 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2311 /*
2312 * If we are on an 82544 has an errata where writing odd
2313 * offsets overwrites the previous even offset, but writing
2314 * backwards over the range solves the issue by always
2315 * writing the odd offset first
2316 */
2317 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2318 }
2319 E1000_WRITE_FLUSH();
2320
2321 if (hw->mac_type == e1000_82542_rev2_0)
2322 e1000_leave_82542_rst(adapter);
2323
2324 kfree(mcarray);
2325 }
2326
2327 /**
2328 * e1000_update_phy_info_task - get phy info
2329 * @work: work struct contained inside adapter struct
2330 *
2331 * Need to wait a few seconds after link up to get diagnostic information from
2332 * the phy
2333 */
2334 static void e1000_update_phy_info_task(struct work_struct *work)
2335 {
2336 struct e1000_adapter *adapter = container_of(work,
2337 struct e1000_adapter,
2338 phy_info_task.work);
2339 if (test_bit(__E1000_DOWN, &adapter->flags))
2340 return;
2341 mutex_lock(&adapter->mutex);
2342 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2343 mutex_unlock(&adapter->mutex);
2344 }
2345
2346 /**
2347 * e1000_82547_tx_fifo_stall_task - task to complete work
2348 * @work: work struct contained inside adapter struct
2349 **/
2350 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2351 {
2352 struct e1000_adapter *adapter = container_of(work,
2353 struct e1000_adapter,
2354 fifo_stall_task.work);
2355 struct e1000_hw *hw = &adapter->hw;
2356 struct net_device *netdev = adapter->netdev;
2357 u32 tctl;
2358
2359 if (test_bit(__E1000_DOWN, &adapter->flags))
2360 return;
2361 mutex_lock(&adapter->mutex);
2362 if (atomic_read(&adapter->tx_fifo_stall)) {
2363 if ((er32(TDT) == er32(TDH)) &&
2364 (er32(TDFT) == er32(TDFH)) &&
2365 (er32(TDFTS) == er32(TDFHS))) {
2366 tctl = er32(TCTL);
2367 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2368 ew32(TDFT, adapter->tx_head_addr);
2369 ew32(TDFH, adapter->tx_head_addr);
2370 ew32(TDFTS, adapter->tx_head_addr);
2371 ew32(TDFHS, adapter->tx_head_addr);
2372 ew32(TCTL, tctl);
2373 E1000_WRITE_FLUSH();
2374
2375 adapter->tx_fifo_head = 0;
2376 atomic_set(&adapter->tx_fifo_stall, 0);
2377 netif_wake_queue(netdev);
2378 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2379 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2380 }
2381 }
2382 mutex_unlock(&adapter->mutex);
2383 }
2384
2385 bool e1000_has_link(struct e1000_adapter *adapter)
2386 {
2387 struct e1000_hw *hw = &adapter->hw;
2388 bool link_active = false;
2389
2390 /* get_link_status is set on LSC (link status) interrupt or rx
2391 * sequence error interrupt (except on intel ce4100).
2392 * get_link_status will stay false until the
2393 * e1000_check_for_link establishes link for copper adapters
2394 * ONLY
2395 */
2396 switch (hw->media_type) {
2397 case e1000_media_type_copper:
2398 if (hw->mac_type == e1000_ce4100)
2399 hw->get_link_status = 1;
2400 if (hw->get_link_status) {
2401 e1000_check_for_link(hw);
2402 link_active = !hw->get_link_status;
2403 } else {
2404 link_active = true;
2405 }
2406 break;
2407 case e1000_media_type_fiber:
2408 e1000_check_for_link(hw);
2409 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2410 break;
2411 case e1000_media_type_internal_serdes:
2412 e1000_check_for_link(hw);
2413 link_active = hw->serdes_has_link;
2414 break;
2415 default:
2416 break;
2417 }
2418
2419 return link_active;
2420 }
2421
2422 /**
2423 * e1000_watchdog - work function
2424 * @work: work struct contained inside adapter struct
2425 **/
2426 static void e1000_watchdog(struct work_struct *work)
2427 {
2428 struct e1000_adapter *adapter = container_of(work,
2429 struct e1000_adapter,
2430 watchdog_task.work);
2431 struct e1000_hw *hw = &adapter->hw;
2432 struct net_device *netdev = adapter->netdev;
2433 struct e1000_tx_ring *txdr = adapter->tx_ring;
2434 u32 link, tctl;
2435
2436 if (test_bit(__E1000_DOWN, &adapter->flags))
2437 return;
2438
2439 mutex_lock(&adapter->mutex);
2440 link = e1000_has_link(adapter);
2441 if ((netif_carrier_ok(netdev)) && link)
2442 goto link_up;
2443
2444 if (link) {
2445 if (!netif_carrier_ok(netdev)) {
2446 u32 ctrl;
2447 bool txb2b = true;
2448 /* update snapshot of PHY registers on LSC */
2449 e1000_get_speed_and_duplex(hw,
2450 &adapter->link_speed,
2451 &adapter->link_duplex);
2452
2453 ctrl = er32(CTRL);
2454 pr_info("%s NIC Link is Up %d Mbps %s, "
2455 "Flow Control: %s\n",
2456 netdev->name,
2457 adapter->link_speed,
2458 adapter->link_duplex == FULL_DUPLEX ?
2459 "Full Duplex" : "Half Duplex",
2460 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2461 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2462 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2463 E1000_CTRL_TFCE) ? "TX" : "None")));
2464
2465 /* adjust timeout factor according to speed/duplex */
2466 adapter->tx_timeout_factor = 1;
2467 switch (adapter->link_speed) {
2468 case SPEED_10:
2469 txb2b = false;
2470 adapter->tx_timeout_factor = 16;
2471 break;
2472 case SPEED_100:
2473 txb2b = false;
2474 /* maybe add some timeout factor ? */
2475 break;
2476 }
2477
2478 /* enable transmits in the hardware */
2479 tctl = er32(TCTL);
2480 tctl |= E1000_TCTL_EN;
2481 ew32(TCTL, tctl);
2482
2483 netif_carrier_on(netdev);
2484 if (!test_bit(__E1000_DOWN, &adapter->flags))
2485 schedule_delayed_work(&adapter->phy_info_task,
2486 2 * HZ);
2487 adapter->smartspeed = 0;
2488 }
2489 } else {
2490 if (netif_carrier_ok(netdev)) {
2491 adapter->link_speed = 0;
2492 adapter->link_duplex = 0;
2493 pr_info("%s NIC Link is Down\n",
2494 netdev->name);
2495 netif_carrier_off(netdev);
2496
2497 if (!test_bit(__E1000_DOWN, &adapter->flags))
2498 schedule_delayed_work(&adapter->phy_info_task,
2499 2 * HZ);
2500 }
2501
2502 e1000_smartspeed(adapter);
2503 }
2504
2505 link_up:
2506 e1000_update_stats(adapter);
2507
2508 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2509 adapter->tpt_old = adapter->stats.tpt;
2510 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2511 adapter->colc_old = adapter->stats.colc;
2512
2513 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2514 adapter->gorcl_old = adapter->stats.gorcl;
2515 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2516 adapter->gotcl_old = adapter->stats.gotcl;
2517
2518 e1000_update_adaptive(hw);
2519
2520 if (!netif_carrier_ok(netdev)) {
2521 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2522 /* We've lost link, so the controller stops DMA,
2523 * but we've got queued Tx work that's never going
2524 * to get done, so reset controller to flush Tx.
2525 * (Do the reset outside of interrupt context). */
2526 adapter->tx_timeout_count++;
2527 schedule_work(&adapter->reset_task);
2528 /* exit immediately since reset is imminent */
2529 goto unlock;
2530 }
2531 }
2532
2533 /* Simple mode for Interrupt Throttle Rate (ITR) */
2534 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2535 /*
2536 * Symmetric Tx/Rx gets a reduced ITR=2000;
2537 * Total asymmetrical Tx or Rx gets ITR=8000;
2538 * everyone else is between 2000-8000.
2539 */
2540 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2541 u32 dif = (adapter->gotcl > adapter->gorcl ?
2542 adapter->gotcl - adapter->gorcl :
2543 adapter->gorcl - adapter->gotcl) / 10000;
2544 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2545
2546 ew32(ITR, 1000000000 / (itr * 256));
2547 }
2548
2549 /* Cause software interrupt to ensure rx ring is cleaned */
2550 ew32(ICS, E1000_ICS_RXDMT0);
2551
2552 /* Force detection of hung controller every watchdog period */
2553 adapter->detect_tx_hung = true;
2554
2555 /* Reschedule the task */
2556 if (!test_bit(__E1000_DOWN, &adapter->flags))
2557 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2558
2559 unlock:
2560 mutex_unlock(&adapter->mutex);
2561 }
2562
2563 enum latency_range {
2564 lowest_latency = 0,
2565 low_latency = 1,
2566 bulk_latency = 2,
2567 latency_invalid = 255
2568 };
2569
2570 /**
2571 * e1000_update_itr - update the dynamic ITR value based on statistics
2572 * @adapter: pointer to adapter
2573 * @itr_setting: current adapter->itr
2574 * @packets: the number of packets during this measurement interval
2575 * @bytes: the number of bytes during this measurement interval
2576 *
2577 * Stores a new ITR value based on packets and byte
2578 * counts during the last interrupt. The advantage of per interrupt
2579 * computation is faster updates and more accurate ITR for the current
2580 * traffic pattern. Constants in this function were computed
2581 * based on theoretical maximum wire speed and thresholds were set based
2582 * on testing data as well as attempting to minimize response time
2583 * while increasing bulk throughput.
2584 * this functionality is controlled by the InterruptThrottleRate module
2585 * parameter (see e1000_param.c)
2586 **/
2587 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2588 u16 itr_setting, int packets, int bytes)
2589 {
2590 unsigned int retval = itr_setting;
2591 struct e1000_hw *hw = &adapter->hw;
2592
2593 if (unlikely(hw->mac_type < e1000_82540))
2594 goto update_itr_done;
2595
2596 if (packets == 0)
2597 goto update_itr_done;
2598
2599 switch (itr_setting) {
2600 case lowest_latency:
2601 /* jumbo frames get bulk treatment*/
2602 if (bytes/packets > 8000)
2603 retval = bulk_latency;
2604 else if ((packets < 5) && (bytes > 512))
2605 retval = low_latency;
2606 break;
2607 case low_latency: /* 50 usec aka 20000 ints/s */
2608 if (bytes > 10000) {
2609 /* jumbo frames need bulk latency setting */
2610 if (bytes/packets > 8000)
2611 retval = bulk_latency;
2612 else if ((packets < 10) || ((bytes/packets) > 1200))
2613 retval = bulk_latency;
2614 else if ((packets > 35))
2615 retval = lowest_latency;
2616 } else if (bytes/packets > 2000)
2617 retval = bulk_latency;
2618 else if (packets <= 2 && bytes < 512)
2619 retval = lowest_latency;
2620 break;
2621 case bulk_latency: /* 250 usec aka 4000 ints/s */
2622 if (bytes > 25000) {
2623 if (packets > 35)
2624 retval = low_latency;
2625 } else if (bytes < 6000) {
2626 retval = low_latency;
2627 }
2628 break;
2629 }
2630
2631 update_itr_done:
2632 return retval;
2633 }
2634
2635 static void e1000_set_itr(struct e1000_adapter *adapter)
2636 {
2637 struct e1000_hw *hw = &adapter->hw;
2638 u16 current_itr;
2639 u32 new_itr = adapter->itr;
2640
2641 if (unlikely(hw->mac_type < e1000_82540))
2642 return;
2643
2644 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2645 if (unlikely(adapter->link_speed != SPEED_1000)) {
2646 current_itr = 0;
2647 new_itr = 4000;
2648 goto set_itr_now;
2649 }
2650
2651 adapter->tx_itr = e1000_update_itr(adapter,
2652 adapter->tx_itr,
2653 adapter->total_tx_packets,
2654 adapter->total_tx_bytes);
2655 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2656 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2657 adapter->tx_itr = low_latency;
2658
2659 adapter->rx_itr = e1000_update_itr(adapter,
2660 adapter->rx_itr,
2661 adapter->total_rx_packets,
2662 adapter->total_rx_bytes);
2663 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2664 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2665 adapter->rx_itr = low_latency;
2666
2667 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2668
2669 switch (current_itr) {
2670 /* counts and packets in update_itr are dependent on these numbers */
2671 case lowest_latency:
2672 new_itr = 70000;
2673 break;
2674 case low_latency:
2675 new_itr = 20000; /* aka hwitr = ~200 */
2676 break;
2677 case bulk_latency:
2678 new_itr = 4000;
2679 break;
2680 default:
2681 break;
2682 }
2683
2684 set_itr_now:
2685 if (new_itr != adapter->itr) {
2686 /* this attempts to bias the interrupt rate towards Bulk
2687 * by adding intermediate steps when interrupt rate is
2688 * increasing */
2689 new_itr = new_itr > adapter->itr ?
2690 min(adapter->itr + (new_itr >> 2), new_itr) :
2691 new_itr;
2692 adapter->itr = new_itr;
2693 ew32(ITR, 1000000000 / (new_itr * 256));
2694 }
2695 }
2696
2697 #define E1000_TX_FLAGS_CSUM 0x00000001
2698 #define E1000_TX_FLAGS_VLAN 0x00000002
2699 #define E1000_TX_FLAGS_TSO 0x00000004
2700 #define E1000_TX_FLAGS_IPV4 0x00000008
2701 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2702 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2703 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2704
2705 static int e1000_tso(struct e1000_adapter *adapter,
2706 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2707 {
2708 struct e1000_context_desc *context_desc;
2709 struct e1000_buffer *buffer_info;
2710 unsigned int i;
2711 u32 cmd_length = 0;
2712 u16 ipcse = 0, tucse, mss;
2713 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2714 int err;
2715
2716 if (skb_is_gso(skb)) {
2717 if (skb_header_cloned(skb)) {
2718 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2719 if (err)
2720 return err;
2721 }
2722
2723 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2724 mss = skb_shinfo(skb)->gso_size;
2725 if (skb->protocol == htons(ETH_P_IP)) {
2726 struct iphdr *iph = ip_hdr(skb);
2727 iph->tot_len = 0;
2728 iph->check = 0;
2729 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2730 iph->daddr, 0,
2731 IPPROTO_TCP,
2732 0);
2733 cmd_length = E1000_TXD_CMD_IP;
2734 ipcse = skb_transport_offset(skb) - 1;
2735 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2736 ipv6_hdr(skb)->payload_len = 0;
2737 tcp_hdr(skb)->check =
2738 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2739 &ipv6_hdr(skb)->daddr,
2740 0, IPPROTO_TCP, 0);
2741 ipcse = 0;
2742 }
2743 ipcss = skb_network_offset(skb);
2744 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2745 tucss = skb_transport_offset(skb);
2746 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2747 tucse = 0;
2748
2749 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2750 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2751
2752 i = tx_ring->next_to_use;
2753 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2754 buffer_info = &tx_ring->buffer_info[i];
2755
2756 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2757 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2758 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2759 context_desc->upper_setup.tcp_fields.tucss = tucss;
2760 context_desc->upper_setup.tcp_fields.tucso = tucso;
2761 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2762 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2763 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2764 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2765
2766 buffer_info->time_stamp = jiffies;
2767 buffer_info->next_to_watch = i;
2768
2769 if (++i == tx_ring->count) i = 0;
2770 tx_ring->next_to_use = i;
2771
2772 return true;
2773 }
2774 return false;
2775 }
2776
2777 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2778 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2779 {
2780 struct e1000_context_desc *context_desc;
2781 struct e1000_buffer *buffer_info;
2782 unsigned int i;
2783 u8 css;
2784 u32 cmd_len = E1000_TXD_CMD_DEXT;
2785
2786 if (skb->ip_summed != CHECKSUM_PARTIAL)
2787 return false;
2788
2789 switch (skb->protocol) {
2790 case cpu_to_be16(ETH_P_IP):
2791 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2792 cmd_len |= E1000_TXD_CMD_TCP;
2793 break;
2794 case cpu_to_be16(ETH_P_IPV6):
2795 /* XXX not handling all IPV6 headers */
2796 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2797 cmd_len |= E1000_TXD_CMD_TCP;
2798 break;
2799 default:
2800 if (unlikely(net_ratelimit()))
2801 e_warn(drv, "checksum_partial proto=%x!\n",
2802 skb->protocol);
2803 break;
2804 }
2805
2806 css = skb_checksum_start_offset(skb);
2807
2808 i = tx_ring->next_to_use;
2809 buffer_info = &tx_ring->buffer_info[i];
2810 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2811
2812 context_desc->lower_setup.ip_config = 0;
2813 context_desc->upper_setup.tcp_fields.tucss = css;
2814 context_desc->upper_setup.tcp_fields.tucso =
2815 css + skb->csum_offset;
2816 context_desc->upper_setup.tcp_fields.tucse = 0;
2817 context_desc->tcp_seg_setup.data = 0;
2818 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2819
2820 buffer_info->time_stamp = jiffies;
2821 buffer_info->next_to_watch = i;
2822
2823 if (unlikely(++i == tx_ring->count)) i = 0;
2824 tx_ring->next_to_use = i;
2825
2826 return true;
2827 }
2828
2829 #define E1000_MAX_TXD_PWR 12
2830 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2831
2832 static int e1000_tx_map(struct e1000_adapter *adapter,
2833 struct e1000_tx_ring *tx_ring,
2834 struct sk_buff *skb, unsigned int first,
2835 unsigned int max_per_txd, unsigned int nr_frags,
2836 unsigned int mss)
2837 {
2838 struct e1000_hw *hw = &adapter->hw;
2839 struct pci_dev *pdev = adapter->pdev;
2840 struct e1000_buffer *buffer_info;
2841 unsigned int len = skb_headlen(skb);
2842 unsigned int offset = 0, size, count = 0, i;
2843 unsigned int f, bytecount, segs;
2844
2845 i = tx_ring->next_to_use;
2846
2847 while (len) {
2848 buffer_info = &tx_ring->buffer_info[i];
2849 size = min(len, max_per_txd);
2850 /* Workaround for Controller erratum --
2851 * descriptor for non-tso packet in a linear SKB that follows a
2852 * tso gets written back prematurely before the data is fully
2853 * DMA'd to the controller */
2854 if (!skb->data_len && tx_ring->last_tx_tso &&
2855 !skb_is_gso(skb)) {
2856 tx_ring->last_tx_tso = false;
2857 size -= 4;
2858 }
2859
2860 /* Workaround for premature desc write-backs
2861 * in TSO mode. Append 4-byte sentinel desc */
2862 if (unlikely(mss && !nr_frags && size == len && size > 8))
2863 size -= 4;
2864 /* work-around for errata 10 and it applies
2865 * to all controllers in PCI-X mode
2866 * The fix is to make sure that the first descriptor of a
2867 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2868 */
2869 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2870 (size > 2015) && count == 0))
2871 size = 2015;
2872
2873 /* Workaround for potential 82544 hang in PCI-X. Avoid
2874 * terminating buffers within evenly-aligned dwords. */
2875 if (unlikely(adapter->pcix_82544 &&
2876 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2877 size > 4))
2878 size -= 4;
2879
2880 buffer_info->length = size;
2881 /* set time_stamp *before* dma to help avoid a possible race */
2882 buffer_info->time_stamp = jiffies;
2883 buffer_info->mapped_as_page = false;
2884 buffer_info->dma = dma_map_single(&pdev->dev,
2885 skb->data + offset,
2886 size, DMA_TO_DEVICE);
2887 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2888 goto dma_error;
2889 buffer_info->next_to_watch = i;
2890
2891 len -= size;
2892 offset += size;
2893 count++;
2894 if (len) {
2895 i++;
2896 if (unlikely(i == tx_ring->count))
2897 i = 0;
2898 }
2899 }
2900
2901 for (f = 0; f < nr_frags; f++) {
2902 const struct skb_frag_struct *frag;
2903
2904 frag = &skb_shinfo(skb)->frags[f];
2905 len = skb_frag_size(frag);
2906 offset = 0;
2907
2908 while (len) {
2909 unsigned long bufend;
2910 i++;
2911 if (unlikely(i == tx_ring->count))
2912 i = 0;
2913
2914 buffer_info = &tx_ring->buffer_info[i];
2915 size = min(len, max_per_txd);
2916 /* Workaround for premature desc write-backs
2917 * in TSO mode. Append 4-byte sentinel desc */
2918 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2919 size -= 4;
2920 /* Workaround for potential 82544 hang in PCI-X.
2921 * Avoid terminating buffers within evenly-aligned
2922 * dwords. */
2923 bufend = (unsigned long)
2924 page_to_phys(skb_frag_page(frag));
2925 bufend += offset + size - 1;
2926 if (unlikely(adapter->pcix_82544 &&
2927 !(bufend & 4) &&
2928 size > 4))
2929 size -= 4;
2930
2931 buffer_info->length = size;
2932 buffer_info->time_stamp = jiffies;
2933 buffer_info->mapped_as_page = true;
2934 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2935 offset, size, DMA_TO_DEVICE);
2936 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2937 goto dma_error;
2938 buffer_info->next_to_watch = i;
2939
2940 len -= size;
2941 offset += size;
2942 count++;
2943 }
2944 }
2945
2946 segs = skb_shinfo(skb)->gso_segs ?: 1;
2947 /* multiply data chunks by size of headers */
2948 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2949
2950 tx_ring->buffer_info[i].skb = skb;
2951 tx_ring->buffer_info[i].segs = segs;
2952 tx_ring->buffer_info[i].bytecount = bytecount;
2953 tx_ring->buffer_info[first].next_to_watch = i;
2954
2955 return count;
2956
2957 dma_error:
2958 dev_err(&pdev->dev, "TX DMA map failed\n");
2959 buffer_info->dma = 0;
2960 if (count)
2961 count--;
2962
2963 while (count--) {
2964 if (i==0)
2965 i += tx_ring->count;
2966 i--;
2967 buffer_info = &tx_ring->buffer_info[i];
2968 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2969 }
2970
2971 return 0;
2972 }
2973
2974 static void e1000_tx_queue(struct e1000_adapter *adapter,
2975 struct e1000_tx_ring *tx_ring, int tx_flags,
2976 int count)
2977 {
2978 struct e1000_hw *hw = &adapter->hw;
2979 struct e1000_tx_desc *tx_desc = NULL;
2980 struct e1000_buffer *buffer_info;
2981 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2982 unsigned int i;
2983
2984 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2985 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2986 E1000_TXD_CMD_TSE;
2987 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2988
2989 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2990 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2991 }
2992
2993 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2994 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2995 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2996 }
2997
2998 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2999 txd_lower |= E1000_TXD_CMD_VLE;
3000 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3001 }
3002
3003 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3004 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3005
3006 i = tx_ring->next_to_use;
3007
3008 while (count--) {
3009 buffer_info = &tx_ring->buffer_info[i];
3010 tx_desc = E1000_TX_DESC(*tx_ring, i);
3011 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3012 tx_desc->lower.data =
3013 cpu_to_le32(txd_lower | buffer_info->length);
3014 tx_desc->upper.data = cpu_to_le32(txd_upper);
3015 if (unlikely(++i == tx_ring->count)) i = 0;
3016 }
3017
3018 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3019
3020 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3021 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3022 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3023
3024 /* Force memory writes to complete before letting h/w
3025 * know there are new descriptors to fetch. (Only
3026 * applicable for weak-ordered memory model archs,
3027 * such as IA-64). */
3028 wmb();
3029
3030 tx_ring->next_to_use = i;
3031 writel(i, hw->hw_addr + tx_ring->tdt);
3032 /* we need this if more than one processor can write to our tail
3033 * at a time, it syncronizes IO on IA64/Altix systems */
3034 mmiowb();
3035 }
3036
3037 /**
3038 * 82547 workaround to avoid controller hang in half-duplex environment.
3039 * The workaround is to avoid queuing a large packet that would span
3040 * the internal Tx FIFO ring boundary by notifying the stack to resend
3041 * the packet at a later time. This gives the Tx FIFO an opportunity to
3042 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3043 * to the beginning of the Tx FIFO.
3044 **/
3045
3046 #define E1000_FIFO_HDR 0x10
3047 #define E1000_82547_PAD_LEN 0x3E0
3048
3049 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3050 struct sk_buff *skb)
3051 {
3052 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3053 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3054
3055 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3056
3057 if (adapter->link_duplex != HALF_DUPLEX)
3058 goto no_fifo_stall_required;
3059
3060 if (atomic_read(&adapter->tx_fifo_stall))
3061 return 1;
3062
3063 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3064 atomic_set(&adapter->tx_fifo_stall, 1);
3065 return 1;
3066 }
3067
3068 no_fifo_stall_required:
3069 adapter->tx_fifo_head += skb_fifo_len;
3070 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3071 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3072 return 0;
3073 }
3074
3075 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3076 {
3077 struct e1000_adapter *adapter = netdev_priv(netdev);
3078 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3079
3080 netif_stop_queue(netdev);
3081 /* Herbert's original patch had:
3082 * smp_mb__after_netif_stop_queue();
3083 * but since that doesn't exist yet, just open code it. */
3084 smp_mb();
3085
3086 /* We need to check again in a case another CPU has just
3087 * made room available. */
3088 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3089 return -EBUSY;
3090
3091 /* A reprieve! */
3092 netif_start_queue(netdev);
3093 ++adapter->restart_queue;
3094 return 0;
3095 }
3096
3097 static int e1000_maybe_stop_tx(struct net_device *netdev,
3098 struct e1000_tx_ring *tx_ring, int size)
3099 {
3100 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3101 return 0;
3102 return __e1000_maybe_stop_tx(netdev, size);
3103 }
3104
3105 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3106 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3107 struct net_device *netdev)
3108 {
3109 struct e1000_adapter *adapter = netdev_priv(netdev);
3110 struct e1000_hw *hw = &adapter->hw;
3111 struct e1000_tx_ring *tx_ring;
3112 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3113 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3114 unsigned int tx_flags = 0;
3115 unsigned int len = skb_headlen(skb);
3116 unsigned int nr_frags;
3117 unsigned int mss;
3118 int count = 0;
3119 int tso;
3120 unsigned int f;
3121
3122 /* This goes back to the question of how to logically map a tx queue
3123 * to a flow. Right now, performance is impacted slightly negatively
3124 * if using multiple tx queues. If the stack breaks away from a
3125 * single qdisc implementation, we can look at this again. */
3126 tx_ring = adapter->tx_ring;
3127
3128 if (unlikely(skb->len <= 0)) {
3129 dev_kfree_skb_any(skb);
3130 return NETDEV_TX_OK;
3131 }
3132
3133 mss = skb_shinfo(skb)->gso_size;
3134 /* The controller does a simple calculation to
3135 * make sure there is enough room in the FIFO before
3136 * initiating the DMA for each buffer. The calc is:
3137 * 4 = ceil(buffer len/mss). To make sure we don't
3138 * overrun the FIFO, adjust the max buffer len if mss
3139 * drops. */
3140 if (mss) {
3141 u8 hdr_len;
3142 max_per_txd = min(mss << 2, max_per_txd);
3143 max_txd_pwr = fls(max_per_txd) - 1;
3144
3145 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3146 if (skb->data_len && hdr_len == len) {
3147 switch (hw->mac_type) {
3148 unsigned int pull_size;
3149 case e1000_82544:
3150 /* Make sure we have room to chop off 4 bytes,
3151 * and that the end alignment will work out to
3152 * this hardware's requirements
3153 * NOTE: this is a TSO only workaround
3154 * if end byte alignment not correct move us
3155 * into the next dword */
3156 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3157 break;
3158 /* fall through */
3159 pull_size = min((unsigned int)4, skb->data_len);
3160 if (!__pskb_pull_tail(skb, pull_size)) {
3161 e_err(drv, "__pskb_pull_tail "
3162 "failed.\n");
3163 dev_kfree_skb_any(skb);
3164 return NETDEV_TX_OK;
3165 }
3166 len = skb_headlen(skb);
3167 break;
3168 default:
3169 /* do nothing */
3170 break;
3171 }
3172 }
3173 }
3174
3175 /* reserve a descriptor for the offload context */
3176 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3177 count++;
3178 count++;
3179
3180 /* Controller Erratum workaround */
3181 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3182 count++;
3183
3184 count += TXD_USE_COUNT(len, max_txd_pwr);
3185
3186 if (adapter->pcix_82544)
3187 count++;
3188
3189 /* work-around for errata 10 and it applies to all controllers
3190 * in PCI-X mode, so add one more descriptor to the count
3191 */
3192 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3193 (len > 2015)))
3194 count++;
3195
3196 nr_frags = skb_shinfo(skb)->nr_frags;
3197 for (f = 0; f < nr_frags; f++)
3198 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3199 max_txd_pwr);
3200 if (adapter->pcix_82544)
3201 count += nr_frags;
3202
3203 /* need: count + 2 desc gap to keep tail from touching
3204 * head, otherwise try next time */
3205 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3206 return NETDEV_TX_BUSY;
3207
3208 if (unlikely((hw->mac_type == e1000_82547) &&
3209 (e1000_82547_fifo_workaround(adapter, skb)))) {
3210 netif_stop_queue(netdev);
3211 if (!test_bit(__E1000_DOWN, &adapter->flags))
3212 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3213 return NETDEV_TX_BUSY;
3214 }
3215
3216 if (vlan_tx_tag_present(skb)) {
3217 tx_flags |= E1000_TX_FLAGS_VLAN;
3218 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3219 }
3220
3221 first = tx_ring->next_to_use;
3222
3223 tso = e1000_tso(adapter, tx_ring, skb);
3224 if (tso < 0) {
3225 dev_kfree_skb_any(skb);
3226 return NETDEV_TX_OK;
3227 }
3228
3229 if (likely(tso)) {
3230 if (likely(hw->mac_type != e1000_82544))
3231 tx_ring->last_tx_tso = true;
3232 tx_flags |= E1000_TX_FLAGS_TSO;
3233 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3234 tx_flags |= E1000_TX_FLAGS_CSUM;
3235
3236 if (likely(skb->protocol == htons(ETH_P_IP)))
3237 tx_flags |= E1000_TX_FLAGS_IPV4;
3238
3239 if (unlikely(skb->no_fcs))
3240 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3241
3242 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3243 nr_frags, mss);
3244
3245 if (count) {
3246 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3247 /* Make sure there is space in the ring for the next send. */
3248 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3249
3250 } else {
3251 dev_kfree_skb_any(skb);
3252 tx_ring->buffer_info[first].time_stamp = 0;
3253 tx_ring->next_to_use = first;
3254 }
3255
3256 return NETDEV_TX_OK;
3257 }
3258
3259 #define NUM_REGS 38 /* 1 based count */
3260 static void e1000_regdump(struct e1000_adapter *adapter)
3261 {
3262 struct e1000_hw *hw = &adapter->hw;
3263 u32 regs[NUM_REGS];
3264 u32 *regs_buff = regs;
3265 int i = 0;
3266
3267 static const char * const reg_name[] = {
3268 "CTRL", "STATUS",
3269 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3270 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3271 "TIDV", "TXDCTL", "TADV", "TARC0",
3272 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3273 "TXDCTL1", "TARC1",
3274 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3275 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3276 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3277 };
3278
3279 regs_buff[0] = er32(CTRL);
3280 regs_buff[1] = er32(STATUS);
3281
3282 regs_buff[2] = er32(RCTL);
3283 regs_buff[3] = er32(RDLEN);
3284 regs_buff[4] = er32(RDH);
3285 regs_buff[5] = er32(RDT);
3286 regs_buff[6] = er32(RDTR);
3287
3288 regs_buff[7] = er32(TCTL);
3289 regs_buff[8] = er32(TDBAL);
3290 regs_buff[9] = er32(TDBAH);
3291 regs_buff[10] = er32(TDLEN);
3292 regs_buff[11] = er32(TDH);
3293 regs_buff[12] = er32(TDT);
3294 regs_buff[13] = er32(TIDV);
3295 regs_buff[14] = er32(TXDCTL);
3296 regs_buff[15] = er32(TADV);
3297 regs_buff[16] = er32(TARC0);
3298
3299 regs_buff[17] = er32(TDBAL1);
3300 regs_buff[18] = er32(TDBAH1);
3301 regs_buff[19] = er32(TDLEN1);
3302 regs_buff[20] = er32(TDH1);
3303 regs_buff[21] = er32(TDT1);
3304 regs_buff[22] = er32(TXDCTL1);
3305 regs_buff[23] = er32(TARC1);
3306 regs_buff[24] = er32(CTRL_EXT);
3307 regs_buff[25] = er32(ERT);
3308 regs_buff[26] = er32(RDBAL0);
3309 regs_buff[27] = er32(RDBAH0);
3310 regs_buff[28] = er32(TDFH);
3311 regs_buff[29] = er32(TDFT);
3312 regs_buff[30] = er32(TDFHS);
3313 regs_buff[31] = er32(TDFTS);
3314 regs_buff[32] = er32(TDFPC);
3315 regs_buff[33] = er32(RDFH);
3316 regs_buff[34] = er32(RDFT);
3317 regs_buff[35] = er32(RDFHS);
3318 regs_buff[36] = er32(RDFTS);
3319 regs_buff[37] = er32(RDFPC);
3320
3321 pr_info("Register dump\n");
3322 for (i = 0; i < NUM_REGS; i++)
3323 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3324 }
3325
3326 /*
3327 * e1000_dump: Print registers, tx ring and rx ring
3328 */
3329 static void e1000_dump(struct e1000_adapter *adapter)
3330 {
3331 /* this code doesn't handle multiple rings */
3332 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3333 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3334 int i;
3335
3336 if (!netif_msg_hw(adapter))
3337 return;
3338
3339 /* Print Registers */
3340 e1000_regdump(adapter);
3341
3342 /*
3343 * transmit dump
3344 */
3345 pr_info("TX Desc ring0 dump\n");
3346
3347 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3348 *
3349 * Legacy Transmit Descriptor
3350 * +--------------------------------------------------------------+
3351 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3352 * +--------------------------------------------------------------+
3353 * 8 | Special | CSS | Status | CMD | CSO | Length |
3354 * +--------------------------------------------------------------+
3355 * 63 48 47 36 35 32 31 24 23 16 15 0
3356 *
3357 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3358 * 63 48 47 40 39 32 31 16 15 8 7 0
3359 * +----------------------------------------------------------------+
3360 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3361 * +----------------------------------------------------------------+
3362 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3363 * +----------------------------------------------------------------+
3364 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3365 *
3366 * Extended Data Descriptor (DTYP=0x1)
3367 * +----------------------------------------------------------------+
3368 * 0 | Buffer Address [63:0] |
3369 * +----------------------------------------------------------------+
3370 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3371 * +----------------------------------------------------------------+
3372 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3373 */
3374 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3375 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3376
3377 if (!netif_msg_tx_done(adapter))
3378 goto rx_ring_summary;
3379
3380 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3381 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3382 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
3383 struct my_u { u64 a; u64 b; };
3384 struct my_u *u = (struct my_u *)tx_desc;
3385 const char *type;
3386
3387 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3388 type = "NTC/U";
3389 else if (i == tx_ring->next_to_use)
3390 type = "NTU";
3391 else if (i == tx_ring->next_to_clean)
3392 type = "NTC";
3393 else
3394 type = "";
3395
3396 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3397 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3398 le64_to_cpu(u->a), le64_to_cpu(u->b),
3399 (u64)buffer_info->dma, buffer_info->length,
3400 buffer_info->next_to_watch,
3401 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3402 }
3403
3404 rx_ring_summary:
3405 /*
3406 * receive dump
3407 */
3408 pr_info("\nRX Desc ring dump\n");
3409
3410 /* Legacy Receive Descriptor Format
3411 *
3412 * +-----------------------------------------------------+
3413 * | Buffer Address [63:0] |
3414 * +-----------------------------------------------------+
3415 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3416 * +-----------------------------------------------------+
3417 * 63 48 47 40 39 32 31 16 15 0
3418 */
3419 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3420
3421 if (!netif_msg_rx_status(adapter))
3422 goto exit;
3423
3424 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3425 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3426 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i];
3427 struct my_u { u64 a; u64 b; };
3428 struct my_u *u = (struct my_u *)rx_desc;
3429 const char *type;
3430
3431 if (i == rx_ring->next_to_use)
3432 type = "NTU";
3433 else if (i == rx_ring->next_to_clean)
3434 type = "NTC";
3435 else
3436 type = "";
3437
3438 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3439 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3440 (u64)buffer_info->dma, buffer_info->skb, type);
3441 } /* for */
3442
3443 /* dump the descriptor caches */
3444 /* rx */
3445 pr_info("Rx descriptor cache in 64bit format\n");
3446 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3447 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3448 i,
3449 readl(adapter->hw.hw_addr + i+4),
3450 readl(adapter->hw.hw_addr + i),
3451 readl(adapter->hw.hw_addr + i+12),
3452 readl(adapter->hw.hw_addr + i+8));
3453 }
3454 /* tx */
3455 pr_info("Tx descriptor cache in 64bit format\n");
3456 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3457 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3458 i,
3459 readl(adapter->hw.hw_addr + i+4),
3460 readl(adapter->hw.hw_addr + i),
3461 readl(adapter->hw.hw_addr + i+12),
3462 readl(adapter->hw.hw_addr + i+8));
3463 }
3464 exit:
3465 return;
3466 }
3467
3468 /**
3469 * e1000_tx_timeout - Respond to a Tx Hang
3470 * @netdev: network interface device structure
3471 **/
3472
3473 static void e1000_tx_timeout(struct net_device *netdev)
3474 {
3475 struct e1000_adapter *adapter = netdev_priv(netdev);
3476
3477 /* Do the reset outside of interrupt context */
3478 adapter->tx_timeout_count++;
3479 schedule_work(&adapter->reset_task);
3480 }
3481
3482 static void e1000_reset_task(struct work_struct *work)
3483 {
3484 struct e1000_adapter *adapter =
3485 container_of(work, struct e1000_adapter, reset_task);
3486
3487 if (test_bit(__E1000_DOWN, &adapter->flags))
3488 return;
3489 e_err(drv, "Reset adapter\n");
3490 e1000_reinit_safe(adapter);
3491 }
3492
3493 /**
3494 * e1000_get_stats - Get System Network Statistics
3495 * @netdev: network interface device structure
3496 *
3497 * Returns the address of the device statistics structure.
3498 * The statistics are actually updated from the watchdog.
3499 **/
3500
3501 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3502 {
3503 /* only return the current stats */
3504 return &netdev->stats;
3505 }
3506
3507 /**
3508 * e1000_change_mtu - Change the Maximum Transfer Unit
3509 * @netdev: network interface device structure
3510 * @new_mtu: new value for maximum frame size
3511 *
3512 * Returns 0 on success, negative on failure
3513 **/
3514
3515 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3516 {
3517 struct e1000_adapter *adapter = netdev_priv(netdev);
3518 struct e1000_hw *hw = &adapter->hw;
3519 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3520
3521 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3522 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3523 e_err(probe, "Invalid MTU setting\n");
3524 return -EINVAL;
3525 }
3526
3527 /* Adapter-specific max frame size limits. */
3528 switch (hw->mac_type) {
3529 case e1000_undefined ... e1000_82542_rev2_1:
3530 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3531 e_err(probe, "Jumbo Frames not supported.\n");
3532 return -EINVAL;
3533 }
3534 break;
3535 default:
3536 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3537 break;
3538 }
3539
3540 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3541 msleep(1);
3542 /* e1000_down has a dependency on max_frame_size */
3543 hw->max_frame_size = max_frame;
3544 if (netif_running(netdev))
3545 e1000_down(adapter);
3546
3547 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3548 * means we reserve 2 more, this pushes us to allocate from the next
3549 * larger slab size.
3550 * i.e. RXBUFFER_2048 --> size-4096 slab
3551 * however with the new *_jumbo_rx* routines, jumbo receives will use
3552 * fragmented skbs */
3553
3554 if (max_frame <= E1000_RXBUFFER_2048)
3555 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3556 else
3557 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3558 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3559 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3560 adapter->rx_buffer_len = PAGE_SIZE;
3561 #endif
3562
3563 /* adjust allocation if LPE protects us, and we aren't using SBP */
3564 if (!hw->tbi_compatibility_on &&
3565 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3566 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3567 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3568
3569 pr_info("%s changing MTU from %d to %d\n",
3570 netdev->name, netdev->mtu, new_mtu);
3571 netdev->mtu = new_mtu;
3572
3573 if (netif_running(netdev))
3574 e1000_up(adapter);
3575 else
3576 e1000_reset(adapter);
3577
3578 clear_bit(__E1000_RESETTING, &adapter->flags);
3579
3580 return 0;
3581 }
3582
3583 /**
3584 * e1000_update_stats - Update the board statistics counters
3585 * @adapter: board private structure
3586 **/
3587
3588 void e1000_update_stats(struct e1000_adapter *adapter)
3589 {
3590 struct net_device *netdev = adapter->netdev;
3591 struct e1000_hw *hw = &adapter->hw;
3592 struct pci_dev *pdev = adapter->pdev;
3593 unsigned long flags;
3594 u16 phy_tmp;
3595
3596 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3597
3598 /*
3599 * Prevent stats update while adapter is being reset, or if the pci
3600 * connection is down.
3601 */
3602 if (adapter->link_speed == 0)
3603 return;
3604 if (pci_channel_offline(pdev))
3605 return;
3606
3607 spin_lock_irqsave(&adapter->stats_lock, flags);
3608
3609 /* these counters are modified from e1000_tbi_adjust_stats,
3610 * called from the interrupt context, so they must only
3611 * be written while holding adapter->stats_lock
3612 */
3613
3614 adapter->stats.crcerrs += er32(CRCERRS);
3615 adapter->stats.gprc += er32(GPRC);
3616 adapter->stats.gorcl += er32(GORCL);
3617 adapter->stats.gorch += er32(GORCH);
3618 adapter->stats.bprc += er32(BPRC);
3619 adapter->stats.mprc += er32(MPRC);
3620 adapter->stats.roc += er32(ROC);
3621
3622 adapter->stats.prc64 += er32(PRC64);
3623 adapter->stats.prc127 += er32(PRC127);
3624 adapter->stats.prc255 += er32(PRC255);
3625 adapter->stats.prc511 += er32(PRC511);
3626 adapter->stats.prc1023 += er32(PRC1023);
3627 adapter->stats.prc1522 += er32(PRC1522);
3628
3629 adapter->stats.symerrs += er32(SYMERRS);
3630 adapter->stats.mpc += er32(MPC);
3631 adapter->stats.scc += er32(SCC);
3632 adapter->stats.ecol += er32(ECOL);
3633 adapter->stats.mcc += er32(MCC);
3634 adapter->stats.latecol += er32(LATECOL);
3635 adapter->stats.dc += er32(DC);
3636 adapter->stats.sec += er32(SEC);
3637 adapter->stats.rlec += er32(RLEC);
3638 adapter->stats.xonrxc += er32(XONRXC);
3639 adapter->stats.xontxc += er32(XONTXC);
3640 adapter->stats.xoffrxc += er32(XOFFRXC);
3641 adapter->stats.xofftxc += er32(XOFFTXC);
3642 adapter->stats.fcruc += er32(FCRUC);
3643 adapter->stats.gptc += er32(GPTC);
3644 adapter->stats.gotcl += er32(GOTCL);
3645 adapter->stats.gotch += er32(GOTCH);
3646 adapter->stats.rnbc += er32(RNBC);
3647 adapter->stats.ruc += er32(RUC);
3648 adapter->stats.rfc += er32(RFC);
3649 adapter->stats.rjc += er32(RJC);
3650 adapter->stats.torl += er32(TORL);
3651 adapter->stats.torh += er32(TORH);
3652 adapter->stats.totl += er32(TOTL);
3653 adapter->stats.toth += er32(TOTH);
3654 adapter->stats.tpr += er32(TPR);
3655
3656 adapter->stats.ptc64 += er32(PTC64);
3657 adapter->stats.ptc127 += er32(PTC127);
3658 adapter->stats.ptc255 += er32(PTC255);
3659 adapter->stats.ptc511 += er32(PTC511);
3660 adapter->stats.ptc1023 += er32(PTC1023);
3661 adapter->stats.ptc1522 += er32(PTC1522);
3662
3663 adapter->stats.mptc += er32(MPTC);
3664 adapter->stats.bptc += er32(BPTC);
3665
3666 /* used for adaptive IFS */
3667
3668 hw->tx_packet_delta = er32(TPT);
3669 adapter->stats.tpt += hw->tx_packet_delta;
3670 hw->collision_delta = er32(COLC);
3671 adapter->stats.colc += hw->collision_delta;
3672
3673 if (hw->mac_type >= e1000_82543) {
3674 adapter->stats.algnerrc += er32(ALGNERRC);
3675 adapter->stats.rxerrc += er32(RXERRC);
3676 adapter->stats.tncrs += er32(TNCRS);
3677 adapter->stats.cexterr += er32(CEXTERR);
3678 adapter->stats.tsctc += er32(TSCTC);
3679 adapter->stats.tsctfc += er32(TSCTFC);
3680 }
3681
3682 /* Fill out the OS statistics structure */
3683 netdev->stats.multicast = adapter->stats.mprc;
3684 netdev->stats.collisions = adapter->stats.colc;
3685
3686 /* Rx Errors */
3687
3688 /* RLEC on some newer hardware can be incorrect so build
3689 * our own version based on RUC and ROC */
3690 netdev->stats.rx_errors = adapter->stats.rxerrc +
3691 adapter->stats.crcerrs + adapter->stats.algnerrc +
3692 adapter->stats.ruc + adapter->stats.roc +
3693 adapter->stats.cexterr;
3694 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3695 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3696 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3697 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3698 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3699
3700 /* Tx Errors */
3701 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3702 netdev->stats.tx_errors = adapter->stats.txerrc;
3703 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3704 netdev->stats.tx_window_errors = adapter->stats.latecol;
3705 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3706 if (hw->bad_tx_carr_stats_fd &&
3707 adapter->link_duplex == FULL_DUPLEX) {
3708 netdev->stats.tx_carrier_errors = 0;
3709 adapter->stats.tncrs = 0;
3710 }
3711
3712 /* Tx Dropped needs to be maintained elsewhere */
3713
3714 /* Phy Stats */
3715 if (hw->media_type == e1000_media_type_copper) {
3716 if ((adapter->link_speed == SPEED_1000) &&
3717 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3718 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3719 adapter->phy_stats.idle_errors += phy_tmp;
3720 }
3721
3722 if ((hw->mac_type <= e1000_82546) &&
3723 (hw->phy_type == e1000_phy_m88) &&
3724 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3725 adapter->phy_stats.receive_errors += phy_tmp;
3726 }
3727
3728 /* Management Stats */
3729 if (hw->has_smbus) {
3730 adapter->stats.mgptc += er32(MGTPTC);
3731 adapter->stats.mgprc += er32(MGTPRC);
3732 adapter->stats.mgpdc += er32(MGTPDC);
3733 }
3734
3735 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3736 }
3737
3738 /**
3739 * e1000_intr - Interrupt Handler
3740 * @irq: interrupt number
3741 * @data: pointer to a network interface device structure
3742 **/
3743
3744 static irqreturn_t e1000_intr(int irq, void *data)
3745 {
3746 struct net_device *netdev = data;
3747 struct e1000_adapter *adapter = netdev_priv(netdev);
3748 struct e1000_hw *hw = &adapter->hw;
3749 u32 icr = er32(ICR);
3750
3751 if (unlikely((!icr)))
3752 return IRQ_NONE; /* Not our interrupt */
3753
3754 /*
3755 * we might have caused the interrupt, but the above
3756 * read cleared it, and just in case the driver is
3757 * down there is nothing to do so return handled
3758 */
3759 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3760 return IRQ_HANDLED;
3761
3762 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3763 hw->get_link_status = 1;
3764 /* guard against interrupt when we're going down */
3765 if (!test_bit(__E1000_DOWN, &adapter->flags))
3766 schedule_delayed_work(&adapter->watchdog_task, 1);
3767 }
3768
3769 /* disable interrupts, without the synchronize_irq bit */
3770 ew32(IMC, ~0);
3771 E1000_WRITE_FLUSH();
3772
3773 if (likely(napi_schedule_prep(&adapter->napi))) {
3774 adapter->total_tx_bytes = 0;
3775 adapter->total_tx_packets = 0;
3776 adapter->total_rx_bytes = 0;
3777 adapter->total_rx_packets = 0;
3778 __napi_schedule(&adapter->napi);
3779 } else {
3780 /* this really should not happen! if it does it is basically a
3781 * bug, but not a hard error, so enable ints and continue */
3782 if (!test_bit(__E1000_DOWN, &adapter->flags))
3783 e1000_irq_enable(adapter);
3784 }
3785
3786 return IRQ_HANDLED;
3787 }
3788
3789 /**
3790 * e1000_clean - NAPI Rx polling callback
3791 * @adapter: board private structure
3792 **/
3793 static int e1000_clean(struct napi_struct *napi, int budget)
3794 {
3795 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3796 int tx_clean_complete = 0, work_done = 0;
3797
3798 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3799
3800 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3801
3802 if (!tx_clean_complete)
3803 work_done = budget;
3804
3805 /* If budget not fully consumed, exit the polling mode */
3806 if (work_done < budget) {
3807 if (likely(adapter->itr_setting & 3))
3808 e1000_set_itr(adapter);
3809 napi_complete(napi);
3810 if (!test_bit(__E1000_DOWN, &adapter->flags))
3811 e1000_irq_enable(adapter);
3812 }
3813
3814 return work_done;
3815 }
3816
3817 /**
3818 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3819 * @adapter: board private structure
3820 **/
3821 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3822 struct e1000_tx_ring *tx_ring)
3823 {
3824 struct e1000_hw *hw = &adapter->hw;
3825 struct net_device *netdev = adapter->netdev;
3826 struct e1000_tx_desc *tx_desc, *eop_desc;
3827 struct e1000_buffer *buffer_info;
3828 unsigned int i, eop;
3829 unsigned int count = 0;
3830 unsigned int total_tx_bytes=0, total_tx_packets=0;
3831
3832 i = tx_ring->next_to_clean;
3833 eop = tx_ring->buffer_info[i].next_to_watch;
3834 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3835
3836 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3837 (count < tx_ring->count)) {
3838 bool cleaned = false;
3839 rmb(); /* read buffer_info after eop_desc */
3840 for ( ; !cleaned; count++) {
3841 tx_desc = E1000_TX_DESC(*tx_ring, i);
3842 buffer_info = &tx_ring->buffer_info[i];
3843 cleaned = (i == eop);
3844
3845 if (cleaned) {
3846 total_tx_packets += buffer_info->segs;
3847 total_tx_bytes += buffer_info->bytecount;
3848 }
3849 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3850 tx_desc->upper.data = 0;
3851
3852 if (unlikely(++i == tx_ring->count)) i = 0;
3853 }
3854
3855 eop = tx_ring->buffer_info[i].next_to_watch;
3856 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3857 }
3858
3859 tx_ring->next_to_clean = i;
3860
3861 #define TX_WAKE_THRESHOLD 32
3862 if (unlikely(count && netif_carrier_ok(netdev) &&
3863 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3864 /* Make sure that anybody stopping the queue after this
3865 * sees the new next_to_clean.
3866 */
3867 smp_mb();
3868
3869 if (netif_queue_stopped(netdev) &&
3870 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3871 netif_wake_queue(netdev);
3872 ++adapter->restart_queue;
3873 }
3874 }
3875
3876 if (adapter->detect_tx_hung) {
3877 /* Detect a transmit hang in hardware, this serializes the
3878 * check with the clearing of time_stamp and movement of i */
3879 adapter->detect_tx_hung = false;
3880 if (tx_ring->buffer_info[eop].time_stamp &&
3881 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3882 (adapter->tx_timeout_factor * HZ)) &&
3883 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3884
3885 /* detected Tx unit hang */
3886 e_err(drv, "Detected Tx Unit Hang\n"
3887 " Tx Queue <%lu>\n"
3888 " TDH <%x>\n"
3889 " TDT <%x>\n"
3890 " next_to_use <%x>\n"
3891 " next_to_clean <%x>\n"
3892 "buffer_info[next_to_clean]\n"
3893 " time_stamp <%lx>\n"
3894 " next_to_watch <%x>\n"
3895 " jiffies <%lx>\n"
3896 " next_to_watch.status <%x>\n",
3897 (unsigned long)((tx_ring - adapter->tx_ring) /
3898 sizeof(struct e1000_tx_ring)),
3899 readl(hw->hw_addr + tx_ring->tdh),
3900 readl(hw->hw_addr + tx_ring->tdt),
3901 tx_ring->next_to_use,
3902 tx_ring->next_to_clean,
3903 tx_ring->buffer_info[eop].time_stamp,
3904 eop,
3905 jiffies,
3906 eop_desc->upper.fields.status);
3907 e1000_dump(adapter);
3908 netif_stop_queue(netdev);
3909 }
3910 }
3911 adapter->total_tx_bytes += total_tx_bytes;
3912 adapter->total_tx_packets += total_tx_packets;
3913 netdev->stats.tx_bytes += total_tx_bytes;
3914 netdev->stats.tx_packets += total_tx_packets;
3915 return count < tx_ring->count;
3916 }
3917
3918 /**
3919 * e1000_rx_checksum - Receive Checksum Offload for 82543
3920 * @adapter: board private structure
3921 * @status_err: receive descriptor status and error fields
3922 * @csum: receive descriptor csum field
3923 * @sk_buff: socket buffer with received data
3924 **/
3925
3926 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3927 u32 csum, struct sk_buff *skb)
3928 {
3929 struct e1000_hw *hw = &adapter->hw;
3930 u16 status = (u16)status_err;
3931 u8 errors = (u8)(status_err >> 24);
3932
3933 skb_checksum_none_assert(skb);
3934
3935 /* 82543 or newer only */
3936 if (unlikely(hw->mac_type < e1000_82543)) return;
3937 /* Ignore Checksum bit is set */
3938 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3939 /* TCP/UDP checksum error bit is set */
3940 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3941 /* let the stack verify checksum errors */
3942 adapter->hw_csum_err++;
3943 return;
3944 }
3945 /* TCP/UDP Checksum has not been calculated */
3946 if (!(status & E1000_RXD_STAT_TCPCS))
3947 return;
3948
3949 /* It must be a TCP or UDP packet with a valid checksum */
3950 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3951 /* TCP checksum is good */
3952 skb->ip_summed = CHECKSUM_UNNECESSARY;
3953 }
3954 adapter->hw_csum_good++;
3955 }
3956
3957 /**
3958 * e1000_consume_page - helper function
3959 **/
3960 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3961 u16 length)
3962 {
3963 bi->page = NULL;
3964 skb->len += length;
3965 skb->data_len += length;
3966 skb->truesize += PAGE_SIZE;
3967 }
3968
3969 /**
3970 * e1000_receive_skb - helper function to handle rx indications
3971 * @adapter: board private structure
3972 * @status: descriptor status field as written by hardware
3973 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3974 * @skb: pointer to sk_buff to be indicated to stack
3975 */
3976 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3977 __le16 vlan, struct sk_buff *skb)
3978 {
3979 skb->protocol = eth_type_trans(skb, adapter->netdev);
3980
3981 if (status & E1000_RXD_STAT_VP) {
3982 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3983
3984 __vlan_hwaccel_put_tag(skb, vid);
3985 }
3986 napi_gro_receive(&adapter->napi, skb);
3987 }
3988
3989 /**
3990 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3991 * @adapter: board private structure
3992 * @rx_ring: ring to clean
3993 * @work_done: amount of napi work completed this call
3994 * @work_to_do: max amount of work allowed for this call to do
3995 *
3996 * the return value indicates whether actual cleaning was done, there
3997 * is no guarantee that everything was cleaned
3998 */
3999 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4000 struct e1000_rx_ring *rx_ring,
4001 int *work_done, int work_to_do)
4002 {
4003 struct e1000_hw *hw = &adapter->hw;
4004 struct net_device *netdev = adapter->netdev;
4005 struct pci_dev *pdev = adapter->pdev;
4006 struct e1000_rx_desc *rx_desc, *next_rxd;
4007 struct e1000_buffer *buffer_info, *next_buffer;
4008 unsigned long irq_flags;
4009 u32 length;
4010 unsigned int i;
4011 int cleaned_count = 0;
4012 bool cleaned = false;
4013 unsigned int total_rx_bytes=0, total_rx_packets=0;
4014
4015 i = rx_ring->next_to_clean;
4016 rx_desc = E1000_RX_DESC(*rx_ring, i);
4017 buffer_info = &rx_ring->buffer_info[i];
4018
4019 while (rx_desc->status & E1000_RXD_STAT_DD) {
4020 struct sk_buff *skb;
4021 u8 status;
4022
4023 if (*work_done >= work_to_do)
4024 break;
4025 (*work_done)++;
4026 rmb(); /* read descriptor and rx_buffer_info after status DD */
4027
4028 status = rx_desc->status;
4029 skb = buffer_info->skb;
4030 buffer_info->skb = NULL;
4031
4032 if (++i == rx_ring->count) i = 0;
4033 next_rxd = E1000_RX_DESC(*rx_ring, i);
4034 prefetch(next_rxd);
4035
4036 next_buffer = &rx_ring->buffer_info[i];
4037
4038 cleaned = true;
4039 cleaned_count++;
4040 dma_unmap_page(&pdev->dev, buffer_info->dma,
4041 buffer_info->length, DMA_FROM_DEVICE);
4042 buffer_info->dma = 0;
4043
4044 length = le16_to_cpu(rx_desc->length);
4045
4046 /* errors is only valid for DD + EOP descriptors */
4047 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4048 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4049 u8 last_byte = *(skb->data + length - 1);
4050 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4051 last_byte)) {
4052 spin_lock_irqsave(&adapter->stats_lock,
4053 irq_flags);
4054 e1000_tbi_adjust_stats(hw, &adapter->stats,
4055 length, skb->data);
4056 spin_unlock_irqrestore(&adapter->stats_lock,
4057 irq_flags);
4058 length--;
4059 } else {
4060 /* recycle both page and skb */
4061 buffer_info->skb = skb;
4062 /* an error means any chain goes out the window
4063 * too */
4064 if (rx_ring->rx_skb_top)
4065 dev_kfree_skb(rx_ring->rx_skb_top);
4066 rx_ring->rx_skb_top = NULL;
4067 goto next_desc;
4068 }
4069 }
4070
4071 #define rxtop rx_ring->rx_skb_top
4072 if (!(status & E1000_RXD_STAT_EOP)) {
4073 /* this descriptor is only the beginning (or middle) */
4074 if (!rxtop) {
4075 /* this is the beginning of a chain */
4076 rxtop = skb;
4077 skb_fill_page_desc(rxtop, 0, buffer_info->page,
4078 0, length);
4079 } else {
4080 /* this is the middle of a chain */
4081 skb_fill_page_desc(rxtop,
4082 skb_shinfo(rxtop)->nr_frags,
4083 buffer_info->page, 0, length);
4084 /* re-use the skb, only consumed the page */
4085 buffer_info->skb = skb;
4086 }
4087 e1000_consume_page(buffer_info, rxtop, length);
4088 goto next_desc;
4089 } else {
4090 if (rxtop) {
4091 /* end of the chain */
4092 skb_fill_page_desc(rxtop,
4093 skb_shinfo(rxtop)->nr_frags,
4094 buffer_info->page, 0, length);
4095 /* re-use the current skb, we only consumed the
4096 * page */
4097 buffer_info->skb = skb;
4098 skb = rxtop;
4099 rxtop = NULL;
4100 e1000_consume_page(buffer_info, skb, length);
4101 } else {
4102 /* no chain, got EOP, this buf is the packet
4103 * copybreak to save the put_page/alloc_page */
4104 if (length <= copybreak &&
4105 skb_tailroom(skb) >= length) {
4106 u8 *vaddr;
4107 vaddr = kmap_atomic(buffer_info->page);
4108 memcpy(skb_tail_pointer(skb), vaddr, length);
4109 kunmap_atomic(vaddr);
4110 /* re-use the page, so don't erase
4111 * buffer_info->page */
4112 skb_put(skb, length);
4113 } else {
4114 skb_fill_page_desc(skb, 0,
4115 buffer_info->page, 0,
4116 length);
4117 e1000_consume_page(buffer_info, skb,
4118 length);
4119 }
4120 }
4121 }
4122
4123 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4124 e1000_rx_checksum(adapter,
4125 (u32)(status) |
4126 ((u32)(rx_desc->errors) << 24),
4127 le16_to_cpu(rx_desc->csum), skb);
4128
4129 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4130 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4131 pskb_trim(skb, skb->len - 4);
4132 total_rx_packets++;
4133
4134 /* eth type trans needs skb->data to point to something */
4135 if (!pskb_may_pull(skb, ETH_HLEN)) {
4136 e_err(drv, "pskb_may_pull failed.\n");
4137 dev_kfree_skb(skb);
4138 goto next_desc;
4139 }
4140
4141 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4142
4143 next_desc:
4144 rx_desc->status = 0;
4145
4146 /* return some buffers to hardware, one at a time is too slow */
4147 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4148 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4149 cleaned_count = 0;
4150 }
4151
4152 /* use prefetched values */
4153 rx_desc = next_rxd;
4154 buffer_info = next_buffer;
4155 }
4156 rx_ring->next_to_clean = i;
4157
4158 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4159 if (cleaned_count)
4160 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4161
4162 adapter->total_rx_packets += total_rx_packets;
4163 adapter->total_rx_bytes += total_rx_bytes;
4164 netdev->stats.rx_bytes += total_rx_bytes;
4165 netdev->stats.rx_packets += total_rx_packets;
4166 return cleaned;
4167 }
4168
4169 /*
4170 * this should improve performance for small packets with large amounts
4171 * of reassembly being done in the stack
4172 */
4173 static void e1000_check_copybreak(struct net_device *netdev,
4174 struct e1000_buffer *buffer_info,
4175 u32 length, struct sk_buff **skb)
4176 {
4177 struct sk_buff *new_skb;
4178
4179 if (length > copybreak)
4180 return;
4181
4182 new_skb = netdev_alloc_skb_ip_align(netdev, length);
4183 if (!new_skb)
4184 return;
4185
4186 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
4187 (*skb)->data - NET_IP_ALIGN,
4188 length + NET_IP_ALIGN);
4189 /* save the skb in buffer_info as good */
4190 buffer_info->skb = *skb;
4191 *skb = new_skb;
4192 }
4193
4194 /**
4195 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4196 * @adapter: board private structure
4197 * @rx_ring: ring to clean
4198 * @work_done: amount of napi work completed this call
4199 * @work_to_do: max amount of work allowed for this call to do
4200 */
4201 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4202 struct e1000_rx_ring *rx_ring,
4203 int *work_done, int work_to_do)
4204 {
4205 struct e1000_hw *hw = &adapter->hw;
4206 struct net_device *netdev = adapter->netdev;
4207 struct pci_dev *pdev = adapter->pdev;
4208 struct e1000_rx_desc *rx_desc, *next_rxd;
4209 struct e1000_buffer *buffer_info, *next_buffer;
4210 unsigned long flags;
4211 u32 length;
4212 unsigned int i;
4213 int cleaned_count = 0;
4214 bool cleaned = false;
4215 unsigned int total_rx_bytes=0, total_rx_packets=0;
4216
4217 i = rx_ring->next_to_clean;
4218 rx_desc = E1000_RX_DESC(*rx_ring, i);
4219 buffer_info = &rx_ring->buffer_info[i];
4220
4221 while (rx_desc->status & E1000_RXD_STAT_DD) {
4222 struct sk_buff *skb;
4223 u8 status;
4224
4225 if (*work_done >= work_to_do)
4226 break;
4227 (*work_done)++;
4228 rmb(); /* read descriptor and rx_buffer_info after status DD */
4229
4230 status = rx_desc->status;
4231 skb = buffer_info->skb;
4232 buffer_info->skb = NULL;
4233
4234 prefetch(skb->data - NET_IP_ALIGN);
4235
4236 if (++i == rx_ring->count) i = 0;
4237 next_rxd = E1000_RX_DESC(*rx_ring, i);
4238 prefetch(next_rxd);
4239
4240 next_buffer = &rx_ring->buffer_info[i];
4241
4242 cleaned = true;
4243 cleaned_count++;
4244 dma_unmap_single(&pdev->dev, buffer_info->dma,
4245 buffer_info->length, DMA_FROM_DEVICE);
4246 buffer_info->dma = 0;
4247
4248 length = le16_to_cpu(rx_desc->length);
4249 /* !EOP means multiple descriptors were used to store a single
4250 * packet, if thats the case we need to toss it. In fact, we
4251 * to toss every packet with the EOP bit clear and the next
4252 * frame that _does_ have the EOP bit set, as it is by
4253 * definition only a frame fragment
4254 */
4255 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4256 adapter->discarding = true;
4257
4258 if (adapter->discarding) {
4259 /* All receives must fit into a single buffer */
4260 e_dbg("Receive packet consumed multiple buffers\n");
4261 /* recycle */
4262 buffer_info->skb = skb;
4263 if (status & E1000_RXD_STAT_EOP)
4264 adapter->discarding = false;
4265 goto next_desc;
4266 }
4267
4268 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4269 u8 last_byte = *(skb->data + length - 1);
4270 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4271 last_byte)) {
4272 spin_lock_irqsave(&adapter->stats_lock, flags);
4273 e1000_tbi_adjust_stats(hw, &adapter->stats,
4274 length, skb->data);
4275 spin_unlock_irqrestore(&adapter->stats_lock,
4276 flags);
4277 length--;
4278 } else {
4279 /* recycle */
4280 buffer_info->skb = skb;
4281 goto next_desc;
4282 }
4283 }
4284
4285 total_rx_bytes += (length - 4); /* don't count FCS */
4286 total_rx_packets++;
4287
4288 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4289 /* adjust length to remove Ethernet CRC, this must be
4290 * done after the TBI_ACCEPT workaround above
4291 */
4292 length -= 4;
4293
4294 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4295
4296 skb_put(skb, length);
4297
4298 /* Receive Checksum Offload */
4299 e1000_rx_checksum(adapter,
4300 (u32)(status) |
4301 ((u32)(rx_desc->errors) << 24),
4302 le16_to_cpu(rx_desc->csum), skb);
4303
4304 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4305
4306 next_desc:
4307 rx_desc->status = 0;
4308
4309 /* return some buffers to hardware, one at a time is too slow */
4310 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4311 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4312 cleaned_count = 0;
4313 }
4314
4315 /* use prefetched values */
4316 rx_desc = next_rxd;
4317 buffer_info = next_buffer;
4318 }
4319 rx_ring->next_to_clean = i;
4320
4321 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4322 if (cleaned_count)
4323 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4324
4325 adapter->total_rx_packets += total_rx_packets;
4326 adapter->total_rx_bytes += total_rx_bytes;
4327 netdev->stats.rx_bytes += total_rx_bytes;
4328 netdev->stats.rx_packets += total_rx_packets;
4329 return cleaned;
4330 }
4331
4332 /**
4333 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4334 * @adapter: address of board private structure
4335 * @rx_ring: pointer to receive ring structure
4336 * @cleaned_count: number of buffers to allocate this pass
4337 **/
4338
4339 static void
4340 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4341 struct e1000_rx_ring *rx_ring, int cleaned_count)
4342 {
4343 struct net_device *netdev = adapter->netdev;
4344 struct pci_dev *pdev = adapter->pdev;
4345 struct e1000_rx_desc *rx_desc;
4346 struct e1000_buffer *buffer_info;
4347 struct sk_buff *skb;
4348 unsigned int i;
4349 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4350
4351 i = rx_ring->next_to_use;
4352 buffer_info = &rx_ring->buffer_info[i];
4353
4354 while (cleaned_count--) {
4355 skb = buffer_info->skb;
4356 if (skb) {
4357 skb_trim(skb, 0);
4358 goto check_page;
4359 }
4360
4361 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4362 if (unlikely(!skb)) {
4363 /* Better luck next round */
4364 adapter->alloc_rx_buff_failed++;
4365 break;
4366 }
4367
4368 /* Fix for errata 23, can't cross 64kB boundary */
4369 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4370 struct sk_buff *oldskb = skb;
4371 e_err(rx_err, "skb align check failed: %u bytes at "
4372 "%p\n", bufsz, skb->data);
4373 /* Try again, without freeing the previous */
4374 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4375 /* Failed allocation, critical failure */
4376 if (!skb) {
4377 dev_kfree_skb(oldskb);
4378 adapter->alloc_rx_buff_failed++;
4379 break;
4380 }
4381
4382 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4383 /* give up */
4384 dev_kfree_skb(skb);
4385 dev_kfree_skb(oldskb);
4386 break; /* while (cleaned_count--) */
4387 }
4388
4389 /* Use new allocation */
4390 dev_kfree_skb(oldskb);
4391 }
4392 buffer_info->skb = skb;
4393 buffer_info->length = adapter->rx_buffer_len;
4394 check_page:
4395 /* allocate a new page if necessary */
4396 if (!buffer_info->page) {
4397 buffer_info->page = alloc_page(GFP_ATOMIC);
4398 if (unlikely(!buffer_info->page)) {
4399 adapter->alloc_rx_buff_failed++;
4400 break;
4401 }
4402 }
4403
4404 if (!buffer_info->dma) {
4405 buffer_info->dma = dma_map_page(&pdev->dev,
4406 buffer_info->page, 0,
4407 buffer_info->length,
4408 DMA_FROM_DEVICE);
4409 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4410 put_page(buffer_info->page);
4411 dev_kfree_skb(skb);
4412 buffer_info->page = NULL;
4413 buffer_info->skb = NULL;
4414 buffer_info->dma = 0;
4415 adapter->alloc_rx_buff_failed++;
4416 break; /* while !buffer_info->skb */
4417 }
4418 }
4419
4420 rx_desc = E1000_RX_DESC(*rx_ring, i);
4421 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4422
4423 if (unlikely(++i == rx_ring->count))
4424 i = 0;
4425 buffer_info = &rx_ring->buffer_info[i];
4426 }
4427
4428 if (likely(rx_ring->next_to_use != i)) {
4429 rx_ring->next_to_use = i;
4430 if (unlikely(i-- == 0))
4431 i = (rx_ring->count - 1);
4432
4433 /* Force memory writes to complete before letting h/w
4434 * know there are new descriptors to fetch. (Only
4435 * applicable for weak-ordered memory model archs,
4436 * such as IA-64). */
4437 wmb();
4438 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4439 }
4440 }
4441
4442 /**
4443 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4444 * @adapter: address of board private structure
4445 **/
4446
4447 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4448 struct e1000_rx_ring *rx_ring,
4449 int cleaned_count)
4450 {
4451 struct e1000_hw *hw = &adapter->hw;
4452 struct net_device *netdev = adapter->netdev;
4453 struct pci_dev *pdev = adapter->pdev;
4454 struct e1000_rx_desc *rx_desc;
4455 struct e1000_buffer *buffer_info;
4456 struct sk_buff *skb;
4457 unsigned int i;
4458 unsigned int bufsz = adapter->rx_buffer_len;
4459
4460 i = rx_ring->next_to_use;
4461 buffer_info = &rx_ring->buffer_info[i];
4462
4463 while (cleaned_count--) {
4464 skb = buffer_info->skb;
4465 if (skb) {
4466 skb_trim(skb, 0);
4467 goto map_skb;
4468 }
4469
4470 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4471 if (unlikely(!skb)) {
4472 /* Better luck next round */
4473 adapter->alloc_rx_buff_failed++;
4474 break;
4475 }
4476
4477 /* Fix for errata 23, can't cross 64kB boundary */
4478 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4479 struct sk_buff *oldskb = skb;
4480 e_err(rx_err, "skb align check failed: %u bytes at "
4481 "%p\n", bufsz, skb->data);
4482 /* Try again, without freeing the previous */
4483 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4484 /* Failed allocation, critical failure */
4485 if (!skb) {
4486 dev_kfree_skb(oldskb);
4487 adapter->alloc_rx_buff_failed++;
4488 break;
4489 }
4490
4491 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4492 /* give up */
4493 dev_kfree_skb(skb);
4494 dev_kfree_skb(oldskb);
4495 adapter->alloc_rx_buff_failed++;
4496 break; /* while !buffer_info->skb */
4497 }
4498
4499 /* Use new allocation */
4500 dev_kfree_skb(oldskb);
4501 }
4502 buffer_info->skb = skb;
4503 buffer_info->length = adapter->rx_buffer_len;
4504 map_skb:
4505 buffer_info->dma = dma_map_single(&pdev->dev,
4506 skb->data,
4507 buffer_info->length,
4508 DMA_FROM_DEVICE);
4509 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4510 dev_kfree_skb(skb);
4511 buffer_info->skb = NULL;
4512 buffer_info->dma = 0;
4513 adapter->alloc_rx_buff_failed++;
4514 break; /* while !buffer_info->skb */
4515 }
4516
4517 /*
4518 * XXX if it was allocated cleanly it will never map to a
4519 * boundary crossing
4520 */
4521
4522 /* Fix for errata 23, can't cross 64kB boundary */
4523 if (!e1000_check_64k_bound(adapter,
4524 (void *)(unsigned long)buffer_info->dma,
4525 adapter->rx_buffer_len)) {
4526 e_err(rx_err, "dma align check failed: %u bytes at "
4527 "%p\n", adapter->rx_buffer_len,
4528 (void *)(unsigned long)buffer_info->dma);
4529 dev_kfree_skb(skb);
4530 buffer_info->skb = NULL;
4531
4532 dma_unmap_single(&pdev->dev, buffer_info->dma,
4533 adapter->rx_buffer_len,
4534 DMA_FROM_DEVICE);
4535 buffer_info->dma = 0;
4536
4537 adapter->alloc_rx_buff_failed++;
4538 break; /* while !buffer_info->skb */
4539 }
4540 rx_desc = E1000_RX_DESC(*rx_ring, i);
4541 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4542
4543 if (unlikely(++i == rx_ring->count))
4544 i = 0;
4545 buffer_info = &rx_ring->buffer_info[i];
4546 }
4547
4548 if (likely(rx_ring->next_to_use != i)) {
4549 rx_ring->next_to_use = i;
4550 if (unlikely(i-- == 0))
4551 i = (rx_ring->count - 1);
4552
4553 /* Force memory writes to complete before letting h/w
4554 * know there are new descriptors to fetch. (Only
4555 * applicable for weak-ordered memory model archs,
4556 * such as IA-64). */
4557 wmb();
4558 writel(i, hw->hw_addr + rx_ring->rdt);
4559 }
4560 }
4561
4562 /**
4563 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4564 * @adapter:
4565 **/
4566
4567 static void e1000_smartspeed(struct e1000_adapter *adapter)
4568 {
4569 struct e1000_hw *hw = &adapter->hw;
4570 u16 phy_status;
4571 u16 phy_ctrl;
4572
4573 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4574 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4575 return;
4576
4577 if (adapter->smartspeed == 0) {
4578 /* If Master/Slave config fault is asserted twice,
4579 * we assume back-to-back */
4580 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4581 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4582 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4583 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4584 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4585 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4586 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4587 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4588 phy_ctrl);
4589 adapter->smartspeed++;
4590 if (!e1000_phy_setup_autoneg(hw) &&
4591 !e1000_read_phy_reg(hw, PHY_CTRL,
4592 &phy_ctrl)) {
4593 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4594 MII_CR_RESTART_AUTO_NEG);
4595 e1000_write_phy_reg(hw, PHY_CTRL,
4596 phy_ctrl);
4597 }
4598 }
4599 return;
4600 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4601 /* If still no link, perhaps using 2/3 pair cable */
4602 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4603 phy_ctrl |= CR_1000T_MS_ENABLE;
4604 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4605 if (!e1000_phy_setup_autoneg(hw) &&
4606 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4607 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4608 MII_CR_RESTART_AUTO_NEG);
4609 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4610 }
4611 }
4612 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4613 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4614 adapter->smartspeed = 0;
4615 }
4616
4617 /**
4618 * e1000_ioctl -
4619 * @netdev:
4620 * @ifreq:
4621 * @cmd:
4622 **/
4623
4624 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4625 {
4626 switch (cmd) {
4627 case SIOCGMIIPHY:
4628 case SIOCGMIIREG:
4629 case SIOCSMIIREG:
4630 return e1000_mii_ioctl(netdev, ifr, cmd);
4631 default:
4632 return -EOPNOTSUPP;
4633 }
4634 }
4635
4636 /**
4637 * e1000_mii_ioctl -
4638 * @netdev:
4639 * @ifreq:
4640 * @cmd:
4641 **/
4642
4643 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4644 int cmd)
4645 {
4646 struct e1000_adapter *adapter = netdev_priv(netdev);
4647 struct e1000_hw *hw = &adapter->hw;
4648 struct mii_ioctl_data *data = if_mii(ifr);
4649 int retval;
4650 u16 mii_reg;
4651 unsigned long flags;
4652
4653 if (hw->media_type != e1000_media_type_copper)
4654 return -EOPNOTSUPP;
4655
4656 switch (cmd) {
4657 case SIOCGMIIPHY:
4658 data->phy_id = hw->phy_addr;
4659 break;
4660 case SIOCGMIIREG:
4661 spin_lock_irqsave(&adapter->stats_lock, flags);
4662 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4663 &data->val_out)) {
4664 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4665 return -EIO;
4666 }
4667 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4668 break;
4669 case SIOCSMIIREG:
4670 if (data->reg_num & ~(0x1F))
4671 return -EFAULT;
4672 mii_reg = data->val_in;
4673 spin_lock_irqsave(&adapter->stats_lock, flags);
4674 if (e1000_write_phy_reg(hw, data->reg_num,
4675 mii_reg)) {
4676 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4677 return -EIO;
4678 }
4679 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4680 if (hw->media_type == e1000_media_type_copper) {
4681 switch (data->reg_num) {
4682 case PHY_CTRL:
4683 if (mii_reg & MII_CR_POWER_DOWN)
4684 break;
4685 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4686 hw->autoneg = 1;
4687 hw->autoneg_advertised = 0x2F;
4688 } else {
4689 u32 speed;
4690 if (mii_reg & 0x40)
4691 speed = SPEED_1000;
4692 else if (mii_reg & 0x2000)
4693 speed = SPEED_100;
4694 else
4695 speed = SPEED_10;
4696 retval = e1000_set_spd_dplx(
4697 adapter, speed,
4698 ((mii_reg & 0x100)
4699 ? DUPLEX_FULL :
4700 DUPLEX_HALF));
4701 if (retval)
4702 return retval;
4703 }
4704 if (netif_running(adapter->netdev))
4705 e1000_reinit_locked(adapter);
4706 else
4707 e1000_reset(adapter);
4708 break;
4709 case M88E1000_PHY_SPEC_CTRL:
4710 case M88E1000_EXT_PHY_SPEC_CTRL:
4711 if (e1000_phy_reset(hw))
4712 return -EIO;
4713 break;
4714 }
4715 } else {
4716 switch (data->reg_num) {
4717 case PHY_CTRL:
4718 if (mii_reg & MII_CR_POWER_DOWN)
4719 break;
4720 if (netif_running(adapter->netdev))
4721 e1000_reinit_locked(adapter);
4722 else
4723 e1000_reset(adapter);
4724 break;
4725 }
4726 }
4727 break;
4728 default:
4729 return -EOPNOTSUPP;
4730 }
4731 return E1000_SUCCESS;
4732 }
4733
4734 void e1000_pci_set_mwi(struct e1000_hw *hw)
4735 {
4736 struct e1000_adapter *adapter = hw->back;
4737 int ret_val = pci_set_mwi(adapter->pdev);
4738
4739 if (ret_val)
4740 e_err(probe, "Error in setting MWI\n");
4741 }
4742
4743 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4744 {
4745 struct e1000_adapter *adapter = hw->back;
4746
4747 pci_clear_mwi(adapter->pdev);
4748 }
4749
4750 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4751 {
4752 struct e1000_adapter *adapter = hw->back;
4753 return pcix_get_mmrbc(adapter->pdev);
4754 }
4755
4756 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4757 {
4758 struct e1000_adapter *adapter = hw->back;
4759 pcix_set_mmrbc(adapter->pdev, mmrbc);
4760 }
4761
4762 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4763 {
4764 outl(value, port);
4765 }
4766
4767 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4768 {
4769 u16 vid;
4770
4771 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4772 return true;
4773 return false;
4774 }
4775
4776 static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4777 netdev_features_t features)
4778 {
4779 struct e1000_hw *hw = &adapter->hw;
4780 u32 ctrl;
4781
4782 ctrl = er32(CTRL);
4783 if (features & NETIF_F_HW_VLAN_RX) {
4784 /* enable VLAN tag insert/strip */
4785 ctrl |= E1000_CTRL_VME;
4786 } else {
4787 /* disable VLAN tag insert/strip */
4788 ctrl &= ~E1000_CTRL_VME;
4789 }
4790 ew32(CTRL, ctrl);
4791 }
4792 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4793 bool filter_on)
4794 {
4795 struct e1000_hw *hw = &adapter->hw;
4796 u32 rctl;
4797
4798 if (!test_bit(__E1000_DOWN, &adapter->flags))
4799 e1000_irq_disable(adapter);
4800
4801 __e1000_vlan_mode(adapter, adapter->netdev->features);
4802 if (filter_on) {
4803 /* enable VLAN receive filtering */
4804 rctl = er32(RCTL);
4805 rctl &= ~E1000_RCTL_CFIEN;
4806 if (!(adapter->netdev->flags & IFF_PROMISC))
4807 rctl |= E1000_RCTL_VFE;
4808 ew32(RCTL, rctl);
4809 e1000_update_mng_vlan(adapter);
4810 } else {
4811 /* disable VLAN receive filtering */
4812 rctl = er32(RCTL);
4813 rctl &= ~E1000_RCTL_VFE;
4814 ew32(RCTL, rctl);
4815 }
4816
4817 if (!test_bit(__E1000_DOWN, &adapter->flags))
4818 e1000_irq_enable(adapter);
4819 }
4820
4821 static void e1000_vlan_mode(struct net_device *netdev,
4822 netdev_features_t features)
4823 {
4824 struct e1000_adapter *adapter = netdev_priv(netdev);
4825
4826 if (!test_bit(__E1000_DOWN, &adapter->flags))
4827 e1000_irq_disable(adapter);
4828
4829 __e1000_vlan_mode(adapter, features);
4830
4831 if (!test_bit(__E1000_DOWN, &adapter->flags))
4832 e1000_irq_enable(adapter);
4833 }
4834
4835 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4836 {
4837 struct e1000_adapter *adapter = netdev_priv(netdev);
4838 struct e1000_hw *hw = &adapter->hw;
4839 u32 vfta, index;
4840
4841 if ((hw->mng_cookie.status &
4842 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4843 (vid == adapter->mng_vlan_id))
4844 return 0;
4845
4846 if (!e1000_vlan_used(adapter))
4847 e1000_vlan_filter_on_off(adapter, true);
4848
4849 /* add VID to filter table */
4850 index = (vid >> 5) & 0x7F;
4851 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4852 vfta |= (1 << (vid & 0x1F));
4853 e1000_write_vfta(hw, index, vfta);
4854
4855 set_bit(vid, adapter->active_vlans);
4856
4857 return 0;
4858 }
4859
4860 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4861 {
4862 struct e1000_adapter *adapter = netdev_priv(netdev);
4863 struct e1000_hw *hw = &adapter->hw;
4864 u32 vfta, index;
4865
4866 if (!test_bit(__E1000_DOWN, &adapter->flags))
4867 e1000_irq_disable(adapter);
4868 if (!test_bit(__E1000_DOWN, &adapter->flags))
4869 e1000_irq_enable(adapter);
4870
4871 /* remove VID from filter table */
4872 index = (vid >> 5) & 0x7F;
4873 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4874 vfta &= ~(1 << (vid & 0x1F));
4875 e1000_write_vfta(hw, index, vfta);
4876
4877 clear_bit(vid, adapter->active_vlans);
4878
4879 if (!e1000_vlan_used(adapter))
4880 e1000_vlan_filter_on_off(adapter, false);
4881
4882 return 0;
4883 }
4884
4885 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4886 {
4887 u16 vid;
4888
4889 if (!e1000_vlan_used(adapter))
4890 return;
4891
4892 e1000_vlan_filter_on_off(adapter, true);
4893 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4894 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4895 }
4896
4897 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4898 {
4899 struct e1000_hw *hw = &adapter->hw;
4900
4901 hw->autoneg = 0;
4902
4903 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4904 * for the switch() below to work */
4905 if ((spd & 1) || (dplx & ~1))
4906 goto err_inval;
4907
4908 /* Fiber NICs only allow 1000 gbps Full duplex */
4909 if ((hw->media_type == e1000_media_type_fiber) &&
4910 spd != SPEED_1000 &&
4911 dplx != DUPLEX_FULL)
4912 goto err_inval;
4913
4914 switch (spd + dplx) {
4915 case SPEED_10 + DUPLEX_HALF:
4916 hw->forced_speed_duplex = e1000_10_half;
4917 break;
4918 case SPEED_10 + DUPLEX_FULL:
4919 hw->forced_speed_duplex = e1000_10_full;
4920 break;
4921 case SPEED_100 + DUPLEX_HALF:
4922 hw->forced_speed_duplex = e1000_100_half;
4923 break;
4924 case SPEED_100 + DUPLEX_FULL:
4925 hw->forced_speed_duplex = e1000_100_full;
4926 break;
4927 case SPEED_1000 + DUPLEX_FULL:
4928 hw->autoneg = 1;
4929 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4930 break;
4931 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4932 default:
4933 goto err_inval;
4934 }
4935 return 0;
4936
4937 err_inval:
4938 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4939 return -EINVAL;
4940 }
4941
4942 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4943 {
4944 struct net_device *netdev = pci_get_drvdata(pdev);
4945 struct e1000_adapter *adapter = netdev_priv(netdev);
4946 struct e1000_hw *hw = &adapter->hw;
4947 u32 ctrl, ctrl_ext, rctl, status;
4948 u32 wufc = adapter->wol;
4949 #ifdef CONFIG_PM
4950 int retval = 0;
4951 #endif
4952
4953 netif_device_detach(netdev);
4954
4955 if (netif_running(netdev)) {
4956 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4957 e1000_down(adapter);
4958 }
4959
4960 #ifdef CONFIG_PM
4961 retval = pci_save_state(pdev);
4962 if (retval)
4963 return retval;
4964 #endif
4965
4966 status = er32(STATUS);
4967 if (status & E1000_STATUS_LU)
4968 wufc &= ~E1000_WUFC_LNKC;
4969
4970 if (wufc) {
4971 e1000_setup_rctl(adapter);
4972 e1000_set_rx_mode(netdev);
4973
4974 rctl = er32(RCTL);
4975
4976 /* turn on all-multi mode if wake on multicast is enabled */
4977 if (wufc & E1000_WUFC_MC)
4978 rctl |= E1000_RCTL_MPE;
4979
4980 /* enable receives in the hardware */
4981 ew32(RCTL, rctl | E1000_RCTL_EN);
4982
4983 if (hw->mac_type >= e1000_82540) {
4984 ctrl = er32(CTRL);
4985 /* advertise wake from D3Cold */
4986 #define E1000_CTRL_ADVD3WUC 0x00100000
4987 /* phy power management enable */
4988 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4989 ctrl |= E1000_CTRL_ADVD3WUC |
4990 E1000_CTRL_EN_PHY_PWR_MGMT;
4991 ew32(CTRL, ctrl);
4992 }
4993
4994 if (hw->media_type == e1000_media_type_fiber ||
4995 hw->media_type == e1000_media_type_internal_serdes) {
4996 /* keep the laser running in D3 */
4997 ctrl_ext = er32(CTRL_EXT);
4998 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4999 ew32(CTRL_EXT, ctrl_ext);
5000 }
5001
5002 ew32(WUC, E1000_WUC_PME_EN);
5003 ew32(WUFC, wufc);
5004 } else {
5005 ew32(WUC, 0);
5006 ew32(WUFC, 0);
5007 }
5008
5009 e1000_release_manageability(adapter);
5010
5011 *enable_wake = !!wufc;
5012
5013 /* make sure adapter isn't asleep if manageability is enabled */
5014 if (adapter->en_mng_pt)
5015 *enable_wake = true;
5016
5017 if (netif_running(netdev))
5018 e1000_free_irq(adapter);
5019
5020 pci_disable_device(pdev);
5021
5022 return 0;
5023 }
5024
5025 #ifdef CONFIG_PM
5026 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5027 {
5028 int retval;
5029 bool wake;
5030
5031 retval = __e1000_shutdown(pdev, &wake);
5032 if (retval)
5033 return retval;
5034
5035 if (wake) {
5036 pci_prepare_to_sleep(pdev);
5037 } else {
5038 pci_wake_from_d3(pdev, false);
5039 pci_set_power_state(pdev, PCI_D3hot);
5040 }
5041
5042 return 0;
5043 }
5044
5045 static int e1000_resume(struct pci_dev *pdev)
5046 {
5047 struct net_device *netdev = pci_get_drvdata(pdev);
5048 struct e1000_adapter *adapter = netdev_priv(netdev);
5049 struct e1000_hw *hw = &adapter->hw;
5050 u32 err;
5051
5052 pci_set_power_state(pdev, PCI_D0);
5053 pci_restore_state(pdev);
5054 pci_save_state(pdev);
5055
5056 if (adapter->need_ioport)
5057 err = pci_enable_device(pdev);
5058 else
5059 err = pci_enable_device_mem(pdev);
5060 if (err) {
5061 pr_err("Cannot enable PCI device from suspend\n");
5062 return err;
5063 }
5064 pci_set_master(pdev);
5065
5066 pci_enable_wake(pdev, PCI_D3hot, 0);
5067 pci_enable_wake(pdev, PCI_D3cold, 0);
5068
5069 if (netif_running(netdev)) {
5070 err = e1000_request_irq(adapter);
5071 if (err)
5072 return err;
5073 }
5074
5075 e1000_power_up_phy(adapter);
5076 e1000_reset(adapter);
5077 ew32(WUS, ~0);
5078
5079 e1000_init_manageability(adapter);
5080
5081 if (netif_running(netdev))
5082 e1000_up(adapter);
5083
5084 netif_device_attach(netdev);
5085
5086 return 0;
5087 }
5088 #endif
5089
5090 static void e1000_shutdown(struct pci_dev *pdev)
5091 {
5092 bool wake;
5093
5094 __e1000_shutdown(pdev, &wake);
5095
5096 if (system_state == SYSTEM_POWER_OFF) {
5097 pci_wake_from_d3(pdev, wake);
5098 pci_set_power_state(pdev, PCI_D3hot);
5099 }
5100 }
5101
5102 #ifdef CONFIG_NET_POLL_CONTROLLER
5103 /*
5104 * Polling 'interrupt' - used by things like netconsole to send skbs
5105 * without having to re-enable interrupts. It's not called while
5106 * the interrupt routine is executing.
5107 */
5108 static void e1000_netpoll(struct net_device *netdev)
5109 {
5110 struct e1000_adapter *adapter = netdev_priv(netdev);
5111
5112 disable_irq(adapter->pdev->irq);
5113 e1000_intr(adapter->pdev->irq, netdev);
5114 enable_irq(adapter->pdev->irq);
5115 }
5116 #endif
5117
5118 /**
5119 * e1000_io_error_detected - called when PCI error is detected
5120 * @pdev: Pointer to PCI device
5121 * @state: The current pci connection state
5122 *
5123 * This function is called after a PCI bus error affecting
5124 * this device has been detected.
5125 */
5126 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5127 pci_channel_state_t state)
5128 {
5129 struct net_device *netdev = pci_get_drvdata(pdev);
5130 struct e1000_adapter *adapter = netdev_priv(netdev);
5131
5132 netif_device_detach(netdev);
5133
5134 if (state == pci_channel_io_perm_failure)
5135 return PCI_ERS_RESULT_DISCONNECT;
5136
5137 if (netif_running(netdev))
5138 e1000_down(adapter);
5139 pci_disable_device(pdev);
5140
5141 /* Request a slot slot reset. */
5142 return PCI_ERS_RESULT_NEED_RESET;
5143 }
5144
5145 /**
5146 * e1000_io_slot_reset - called after the pci bus has been reset.
5147 * @pdev: Pointer to PCI device
5148 *
5149 * Restart the card from scratch, as if from a cold-boot. Implementation
5150 * resembles the first-half of the e1000_resume routine.
5151 */
5152 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5153 {
5154 struct net_device *netdev = pci_get_drvdata(pdev);
5155 struct e1000_adapter *adapter = netdev_priv(netdev);
5156 struct e1000_hw *hw = &adapter->hw;
5157 int err;
5158
5159 if (adapter->need_ioport)
5160 err = pci_enable_device(pdev);
5161 else
5162 err = pci_enable_device_mem(pdev);
5163 if (err) {
5164 pr_err("Cannot re-enable PCI device after reset.\n");
5165 return PCI_ERS_RESULT_DISCONNECT;
5166 }
5167 pci_set_master(pdev);
5168
5169 pci_enable_wake(pdev, PCI_D3hot, 0);
5170 pci_enable_wake(pdev, PCI_D3cold, 0);
5171
5172 e1000_reset(adapter);
5173 ew32(WUS, ~0);
5174
5175 return PCI_ERS_RESULT_RECOVERED;
5176 }
5177
5178 /**
5179 * e1000_io_resume - called when traffic can start flowing again.
5180 * @pdev: Pointer to PCI device
5181 *
5182 * This callback is called when the error recovery driver tells us that
5183 * its OK to resume normal operation. Implementation resembles the
5184 * second-half of the e1000_resume routine.
5185 */
5186 static void e1000_io_resume(struct pci_dev *pdev)
5187 {
5188 struct net_device *netdev = pci_get_drvdata(pdev);
5189 struct e1000_adapter *adapter = netdev_priv(netdev);
5190
5191 e1000_init_manageability(adapter);
5192
5193 if (netif_running(netdev)) {
5194 if (e1000_up(adapter)) {
5195 pr_info("can't bring device back up after reset\n");
5196 return;
5197 }
5198 }
5199
5200 netif_device_attach(netdev);
5201 }
5202
5203 /* e1000_main.c */
Linux kernel - Deliverables
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