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e1000: save skb counts in TX to avoid cache misses
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / e1000 / e1000_main.c
blob99525f9b41b64623ede0994122804a8a109d83b6
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
34 /* Intel Media SOC GbE MDIO physical base address */
35 static unsigned long ce4100_gbe_mdio_base_phy;
36 /* Intel Media SOC GbE MDIO virtual base address */
37 void __iomem *ce4100_gbe_mdio_base_virt;
38
39 char e1000_driver_name[] = "e1000";
40 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
41 #define DRV_VERSION "7.3.21-k8-NAPI"
42 const char e1000_driver_version[] = DRV_VERSION;
43 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
44
45 /* e1000_pci_tbl - PCI Device ID Table
46 *
47 * Last entry must be all 0s
48 *
49 * Macro expands to...
50 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
51 */
52 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
53 INTEL_E1000_ETHERNET_DEVICE(0x1000),
54 INTEL_E1000_ETHERNET_DEVICE(0x1001),
55 INTEL_E1000_ETHERNET_DEVICE(0x1004),
56 INTEL_E1000_ETHERNET_DEVICE(0x1008),
57 INTEL_E1000_ETHERNET_DEVICE(0x1009),
58 INTEL_E1000_ETHERNET_DEVICE(0x100C),
59 INTEL_E1000_ETHERNET_DEVICE(0x100D),
60 INTEL_E1000_ETHERNET_DEVICE(0x100E),
61 INTEL_E1000_ETHERNET_DEVICE(0x100F),
62 INTEL_E1000_ETHERNET_DEVICE(0x1010),
63 INTEL_E1000_ETHERNET_DEVICE(0x1011),
64 INTEL_E1000_ETHERNET_DEVICE(0x1012),
65 INTEL_E1000_ETHERNET_DEVICE(0x1013),
66 INTEL_E1000_ETHERNET_DEVICE(0x1014),
67 INTEL_E1000_ETHERNET_DEVICE(0x1015),
68 INTEL_E1000_ETHERNET_DEVICE(0x1016),
69 INTEL_E1000_ETHERNET_DEVICE(0x1017),
70 INTEL_E1000_ETHERNET_DEVICE(0x1018),
71 INTEL_E1000_ETHERNET_DEVICE(0x1019),
72 INTEL_E1000_ETHERNET_DEVICE(0x101A),
73 INTEL_E1000_ETHERNET_DEVICE(0x101D),
74 INTEL_E1000_ETHERNET_DEVICE(0x101E),
75 INTEL_E1000_ETHERNET_DEVICE(0x1026),
76 INTEL_E1000_ETHERNET_DEVICE(0x1027),
77 INTEL_E1000_ETHERNET_DEVICE(0x1028),
78 INTEL_E1000_ETHERNET_DEVICE(0x1075),
79 INTEL_E1000_ETHERNET_DEVICE(0x1076),
80 INTEL_E1000_ETHERNET_DEVICE(0x1077),
81 INTEL_E1000_ETHERNET_DEVICE(0x1078),
82 INTEL_E1000_ETHERNET_DEVICE(0x1079),
83 INTEL_E1000_ETHERNET_DEVICE(0x107A),
84 INTEL_E1000_ETHERNET_DEVICE(0x107B),
85 INTEL_E1000_ETHERNET_DEVICE(0x107C),
86 INTEL_E1000_ETHERNET_DEVICE(0x108A),
87 INTEL_E1000_ETHERNET_DEVICE(0x1099),
88 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
89 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
90 /* required last entry */
91 {0,}
92 };
93
94 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
95
96 int e1000_up(struct e1000_adapter *adapter);
97 void e1000_down(struct e1000_adapter *adapter);
98 void e1000_reinit_locked(struct e1000_adapter *adapter);
99 void e1000_reset(struct e1000_adapter *adapter);
100 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
101 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
102 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
103 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
104 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
105 struct e1000_tx_ring *txdr);
106 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
107 struct e1000_rx_ring *rxdr);
108 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
109 struct e1000_tx_ring *tx_ring);
110 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
111 struct e1000_rx_ring *rx_ring);
112 void e1000_update_stats(struct e1000_adapter *adapter);
113
114 static int e1000_init_module(void);
115 static void e1000_exit_module(void);
116 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
117 static void __devexit e1000_remove(struct pci_dev *pdev);
118 static int e1000_alloc_queues(struct e1000_adapter *adapter);
119 static int e1000_sw_init(struct e1000_adapter *adapter);
120 static int e1000_open(struct net_device *netdev);
121 static int e1000_close(struct net_device *netdev);
122 static void e1000_configure_tx(struct e1000_adapter *adapter);
123 static void e1000_configure_rx(struct e1000_adapter *adapter);
124 static void e1000_setup_rctl(struct e1000_adapter *adapter);
125 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
126 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
127 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
128 struct e1000_tx_ring *tx_ring);
129 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
130 struct e1000_rx_ring *rx_ring);
131 static void e1000_set_rx_mode(struct net_device *netdev);
132 static void e1000_update_phy_info(unsigned long data);
133 static void e1000_update_phy_info_task(struct work_struct *work);
134 static void e1000_watchdog(unsigned long data);
135 static void e1000_82547_tx_fifo_stall(unsigned long data);
136 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
137 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
138 struct net_device *netdev);
139 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
140 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
141 static int e1000_set_mac(struct net_device *netdev, void *p);
142 static irqreturn_t e1000_intr(int irq, void *data);
143 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
144 struct e1000_tx_ring *tx_ring);
145 static int e1000_clean(struct napi_struct *napi, int budget);
146 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
147 struct e1000_rx_ring *rx_ring,
148 int *work_done, int work_to_do);
149 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
150 struct e1000_rx_ring *rx_ring,
151 int *work_done, int work_to_do);
152 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
153 struct e1000_rx_ring *rx_ring,
154 int cleaned_count);
155 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
156 struct e1000_rx_ring *rx_ring,
157 int cleaned_count);
158 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
159 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
160 int cmd);
161 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
162 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
163 static void e1000_tx_timeout(struct net_device *dev);
164 static void e1000_reset_task(struct work_struct *work);
165 static void e1000_smartspeed(struct e1000_adapter *adapter);
166 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
167 struct sk_buff *skb);
168
169 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
170 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
171 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
172 static void e1000_restore_vlan(struct e1000_adapter *adapter);
173
174 #ifdef CONFIG_PM
175 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
176 static int e1000_resume(struct pci_dev *pdev);
177 #endif
178 static void e1000_shutdown(struct pci_dev *pdev);
179
180 #ifdef CONFIG_NET_POLL_CONTROLLER
181 /* for netdump / net console */
182 static void e1000_netpoll (struct net_device *netdev);
183 #endif
184
185 #define COPYBREAK_DEFAULT 256
186 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
187 module_param(copybreak, uint, 0644);
188 MODULE_PARM_DESC(copybreak,
189 "Maximum size of packet that is copied to a new buffer on receive");
190
191 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
192 pci_channel_state_t state);
193 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
194 static void e1000_io_resume(struct pci_dev *pdev);
195
196 static struct pci_error_handlers e1000_err_handler = {
197 .error_detected = e1000_io_error_detected,
198 .slot_reset = e1000_io_slot_reset,
199 .resume = e1000_io_resume,
200 };
201
202 static struct pci_driver e1000_driver = {
203 .name = e1000_driver_name,
204 .id_table = e1000_pci_tbl,
205 .probe = e1000_probe,
206 .remove = __devexit_p(e1000_remove),
207 #ifdef CONFIG_PM
208 /* Power Management Hooks */
209 .suspend = e1000_suspend,
210 .resume = e1000_resume,
211 #endif
212 .shutdown = e1000_shutdown,
213 .err_handler = &e1000_err_handler
214 };
215
216 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
217 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
218 MODULE_LICENSE("GPL");
219 MODULE_VERSION(DRV_VERSION);
220
221 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
222 module_param(debug, int, 0);
223 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
224
225 /**
226 * e1000_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 if (adapter->vlgrp) {
334 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
335 if (hw->mng_cookie.status &
336 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
337 e1000_vlan_rx_add_vid(netdev, vid);
338 adapter->mng_vlan_id = vid;
339 } else
340 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
341
342 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
343 (vid != old_vid) &&
344 !vlan_group_get_device(adapter->vlgrp, old_vid))
345 e1000_vlan_rx_kill_vid(netdev, old_vid);
346 } else
347 adapter->mng_vlan_id = vid;
348 }
349 }
350
351 static void e1000_init_manageability(struct e1000_adapter *adapter)
352 {
353 struct e1000_hw *hw = &adapter->hw;
354
355 if (adapter->en_mng_pt) {
356 u32 manc = er32(MANC);
357
358 /* disable hardware interception of ARP */
359 manc &= ~(E1000_MANC_ARP_EN);
360
361 ew32(MANC, manc);
362 }
363 }
364
365 static void e1000_release_manageability(struct e1000_adapter *adapter)
366 {
367 struct e1000_hw *hw = &adapter->hw;
368
369 if (adapter->en_mng_pt) {
370 u32 manc = er32(MANC);
371
372 /* re-enable hardware interception of ARP */
373 manc |= E1000_MANC_ARP_EN;
374
375 ew32(MANC, manc);
376 }
377 }
378
379 /**
380 * e1000_configure - configure the hardware for RX and TX
381 * @adapter = private board structure
382 **/
383 static void e1000_configure(struct e1000_adapter *adapter)
384 {
385 struct net_device *netdev = adapter->netdev;
386 int i;
387
388 e1000_set_rx_mode(netdev);
389
390 e1000_restore_vlan(adapter);
391 e1000_init_manageability(adapter);
392
393 e1000_configure_tx(adapter);
394 e1000_setup_rctl(adapter);
395 e1000_configure_rx(adapter);
396 /* call E1000_DESC_UNUSED which always leaves
397 * at least 1 descriptor unused to make sure
398 * next_to_use != next_to_clean */
399 for (i = 0; i < adapter->num_rx_queues; i++) {
400 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
401 adapter->alloc_rx_buf(adapter, ring,
402 E1000_DESC_UNUSED(ring));
403 }
404 }
405
406 int e1000_up(struct e1000_adapter *adapter)
407 {
408 struct e1000_hw *hw = &adapter->hw;
409
410 /* hardware has been reset, we need to reload some things */
411 e1000_configure(adapter);
412
413 clear_bit(__E1000_DOWN, &adapter->flags);
414
415 napi_enable(&adapter->napi);
416
417 e1000_irq_enable(adapter);
418
419 netif_wake_queue(adapter->netdev);
420
421 /* fire a link change interrupt to start the watchdog */
422 ew32(ICS, E1000_ICS_LSC);
423 return 0;
424 }
425
426 /**
427 * e1000_power_up_phy - restore link in case the phy was powered down
428 * @adapter: address of board private structure
429 *
430 * The phy may be powered down to save power and turn off link when the
431 * driver is unloaded and wake on lan is not enabled (among others)
432 * *** this routine MUST be followed by a call to e1000_reset ***
433 *
434 **/
435
436 void e1000_power_up_phy(struct e1000_adapter *adapter)
437 {
438 struct e1000_hw *hw = &adapter->hw;
439 u16 mii_reg = 0;
440
441 /* Just clear the power down bit to wake the phy back up */
442 if (hw->media_type == e1000_media_type_copper) {
443 /* according to the manual, the phy will retain its
444 * settings across a power-down/up cycle */
445 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
446 mii_reg &= ~MII_CR_POWER_DOWN;
447 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
448 }
449 }
450
451 static void e1000_power_down_phy(struct e1000_adapter *adapter)
452 {
453 struct e1000_hw *hw = &adapter->hw;
454
455 /* Power down the PHY so no link is implied when interface is down *
456 * The PHY cannot be powered down if any of the following is true *
457 * (a) WoL is enabled
458 * (b) AMT is active
459 * (c) SoL/IDER session is active */
460 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
461 hw->media_type == e1000_media_type_copper) {
462 u16 mii_reg = 0;
463
464 switch (hw->mac_type) {
465 case e1000_82540:
466 case e1000_82545:
467 case e1000_82545_rev_3:
468 case e1000_82546:
469 case e1000_ce4100:
470 case e1000_82546_rev_3:
471 case e1000_82541:
472 case e1000_82541_rev_2:
473 case e1000_82547:
474 case e1000_82547_rev_2:
475 if (er32(MANC) & E1000_MANC_SMBUS_EN)
476 goto out;
477 break;
478 default:
479 goto out;
480 }
481 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
482 mii_reg |= MII_CR_POWER_DOWN;
483 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
484 mdelay(1);
485 }
486 out:
487 return;
488 }
489
490 void e1000_down(struct e1000_adapter *adapter)
491 {
492 struct e1000_hw *hw = &adapter->hw;
493 struct net_device *netdev = adapter->netdev;
494 u32 rctl, tctl;
495
496
497 /* disable receives in the hardware */
498 rctl = er32(RCTL);
499 ew32(RCTL, rctl & ~E1000_RCTL_EN);
500 /* flush and sleep below */
501
502 netif_tx_disable(netdev);
503
504 /* disable transmits in the hardware */
505 tctl = er32(TCTL);
506 tctl &= ~E1000_TCTL_EN;
507 ew32(TCTL, tctl);
508 /* flush both disables and wait for them to finish */
509 E1000_WRITE_FLUSH();
510 msleep(10);
511
512 napi_disable(&adapter->napi);
513
514 e1000_irq_disable(adapter);
515
516 /*
517 * Setting DOWN must be after irq_disable to prevent
518 * a screaming interrupt. Setting DOWN also prevents
519 * timers and tasks from rescheduling.
520 */
521 set_bit(__E1000_DOWN, &adapter->flags);
522
523 del_timer_sync(&adapter->tx_fifo_stall_timer);
524 del_timer_sync(&adapter->watchdog_timer);
525 del_timer_sync(&adapter->phy_info_timer);
526
527 adapter->link_speed = 0;
528 adapter->link_duplex = 0;
529 netif_carrier_off(netdev);
530
531 e1000_reset(adapter);
532 e1000_clean_all_tx_rings(adapter);
533 e1000_clean_all_rx_rings(adapter);
534 }
535
536 static void e1000_reinit_safe(struct e1000_adapter *adapter)
537 {
538 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
539 msleep(1);
540 rtnl_lock();
541 e1000_down(adapter);
542 e1000_up(adapter);
543 rtnl_unlock();
544 clear_bit(__E1000_RESETTING, &adapter->flags);
545 }
546
547 void e1000_reinit_locked(struct e1000_adapter *adapter)
548 {
549 /* if rtnl_lock is not held the call path is bogus */
550 ASSERT_RTNL();
551 WARN_ON(in_interrupt());
552 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
553 msleep(1);
554 e1000_down(adapter);
555 e1000_up(adapter);
556 clear_bit(__E1000_RESETTING, &adapter->flags);
557 }
558
559 void e1000_reset(struct e1000_adapter *adapter)
560 {
561 struct e1000_hw *hw = &adapter->hw;
562 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
563 bool legacy_pba_adjust = false;
564 u16 hwm;
565
566 /* Repartition Pba for greater than 9k mtu
567 * To take effect CTRL.RST is required.
568 */
569
570 switch (hw->mac_type) {
571 case e1000_82542_rev2_0:
572 case e1000_82542_rev2_1:
573 case e1000_82543:
574 case e1000_82544:
575 case e1000_82540:
576 case e1000_82541:
577 case e1000_82541_rev_2:
578 legacy_pba_adjust = true;
579 pba = E1000_PBA_48K;
580 break;
581 case e1000_82545:
582 case e1000_82545_rev_3:
583 case e1000_82546:
584 case e1000_ce4100:
585 case e1000_82546_rev_3:
586 pba = E1000_PBA_48K;
587 break;
588 case e1000_82547:
589 case e1000_82547_rev_2:
590 legacy_pba_adjust = true;
591 pba = E1000_PBA_30K;
592 break;
593 case e1000_undefined:
594 case e1000_num_macs:
595 break;
596 }
597
598 if (legacy_pba_adjust) {
599 if (hw->max_frame_size > E1000_RXBUFFER_8192)
600 pba -= 8; /* allocate more FIFO for Tx */
601
602 if (hw->mac_type == e1000_82547) {
603 adapter->tx_fifo_head = 0;
604 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
605 adapter->tx_fifo_size =
606 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
607 atomic_set(&adapter->tx_fifo_stall, 0);
608 }
609 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
610 /* adjust PBA for jumbo frames */
611 ew32(PBA, pba);
612
613 /* To maintain wire speed transmits, the Tx FIFO should be
614 * large enough to accommodate two full transmit packets,
615 * rounded up to the next 1KB and expressed in KB. Likewise,
616 * the Rx FIFO should be large enough to accommodate at least
617 * one full receive packet and is similarly rounded up and
618 * expressed in KB. */
619 pba = er32(PBA);
620 /* upper 16 bits has Tx packet buffer allocation size in KB */
621 tx_space = pba >> 16;
622 /* lower 16 bits has Rx packet buffer allocation size in KB */
623 pba &= 0xffff;
624 /*
625 * the tx fifo also stores 16 bytes of information about the tx
626 * but don't include ethernet FCS because hardware appends it
627 */
628 min_tx_space = (hw->max_frame_size +
629 sizeof(struct e1000_tx_desc) -
630 ETH_FCS_LEN) * 2;
631 min_tx_space = ALIGN(min_tx_space, 1024);
632 min_tx_space >>= 10;
633 /* software strips receive CRC, so leave room for it */
634 min_rx_space = hw->max_frame_size;
635 min_rx_space = ALIGN(min_rx_space, 1024);
636 min_rx_space >>= 10;
637
638 /* If current Tx allocation is less than the min Tx FIFO size,
639 * and the min Tx FIFO size is less than the current Rx FIFO
640 * allocation, take space away from current Rx allocation */
641 if (tx_space < min_tx_space &&
642 ((min_tx_space - tx_space) < pba)) {
643 pba = pba - (min_tx_space - tx_space);
644
645 /* PCI/PCIx hardware has PBA alignment constraints */
646 switch (hw->mac_type) {
647 case e1000_82545 ... e1000_82546_rev_3:
648 pba &= ~(E1000_PBA_8K - 1);
649 break;
650 default:
651 break;
652 }
653
654 /* if short on rx space, rx wins and must trump tx
655 * adjustment or use Early Receive if available */
656 if (pba < min_rx_space)
657 pba = min_rx_space;
658 }
659 }
660
661 ew32(PBA, pba);
662
663 /*
664 * flow control settings:
665 * The high water mark must be low enough to fit one full frame
666 * (or the size used for early receive) above it in the Rx FIFO.
667 * Set it to the lower of:
668 * - 90% of the Rx FIFO size, and
669 * - the full Rx FIFO size minus the early receive size (for parts
670 * with ERT support assuming ERT set to E1000_ERT_2048), or
671 * - the full Rx FIFO size minus one full frame
672 */
673 hwm = min(((pba << 10) * 9 / 10),
674 ((pba << 10) - hw->max_frame_size));
675
676 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
677 hw->fc_low_water = hw->fc_high_water - 8;
678 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
679 hw->fc_send_xon = 1;
680 hw->fc = hw->original_fc;
681
682 /* Allow time for pending master requests to run */
683 e1000_reset_hw(hw);
684 if (hw->mac_type >= e1000_82544)
685 ew32(WUC, 0);
686
687 if (e1000_init_hw(hw))
688 e_dev_err("Hardware Error\n");
689 e1000_update_mng_vlan(adapter);
690
691 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
692 if (hw->mac_type >= e1000_82544 &&
693 hw->autoneg == 1 &&
694 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
695 u32 ctrl = er32(CTRL);
696 /* clear phy power management bit if we are in gig only mode,
697 * which if enabled will attempt negotiation to 100Mb, which
698 * can cause a loss of link at power off or driver unload */
699 ctrl &= ~E1000_CTRL_SWDPIN3;
700 ew32(CTRL, ctrl);
701 }
702
703 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
704 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
705
706 e1000_reset_adaptive(hw);
707 e1000_phy_get_info(hw, &adapter->phy_info);
708
709 e1000_release_manageability(adapter);
710 }
711
712 /**
713 * Dump the eeprom for users having checksum issues
714 **/
715 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
716 {
717 struct net_device *netdev = adapter->netdev;
718 struct ethtool_eeprom eeprom;
719 const struct ethtool_ops *ops = netdev->ethtool_ops;
720 u8 *data;
721 int i;
722 u16 csum_old, csum_new = 0;
723
724 eeprom.len = ops->get_eeprom_len(netdev);
725 eeprom.offset = 0;
726
727 data = kmalloc(eeprom.len, GFP_KERNEL);
728 if (!data) {
729 pr_err("Unable to allocate memory to dump EEPROM data\n");
730 return;
731 }
732
733 ops->get_eeprom(netdev, &eeprom, data);
734
735 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
736 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
737 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
738 csum_new += data[i] + (data[i + 1] << 8);
739 csum_new = EEPROM_SUM - csum_new;
740
741 pr_err("/*********************/\n");
742 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
743 pr_err("Calculated : 0x%04x\n", csum_new);
744
745 pr_err("Offset Values\n");
746 pr_err("======== ======\n");
747 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
748
749 pr_err("Include this output when contacting your support provider.\n");
750 pr_err("This is not a software error! Something bad happened to\n");
751 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
752 pr_err("result in further problems, possibly loss of data,\n");
753 pr_err("corruption or system hangs!\n");
754 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
755 pr_err("which is invalid and requires you to set the proper MAC\n");
756 pr_err("address manually before continuing to enable this network\n");
757 pr_err("device. Please inspect the EEPROM dump and report the\n");
758 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
759 pr_err("/*********************/\n");
760
761 kfree(data);
762 }
763
764 /**
765 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
766 * @pdev: PCI device information struct
767 *
768 * Return true if an adapter needs ioport resources
769 **/
770 static int e1000_is_need_ioport(struct pci_dev *pdev)
771 {
772 switch (pdev->device) {
773 case E1000_DEV_ID_82540EM:
774 case E1000_DEV_ID_82540EM_LOM:
775 case E1000_DEV_ID_82540EP:
776 case E1000_DEV_ID_82540EP_LOM:
777 case E1000_DEV_ID_82540EP_LP:
778 case E1000_DEV_ID_82541EI:
779 case E1000_DEV_ID_82541EI_MOBILE:
780 case E1000_DEV_ID_82541ER:
781 case E1000_DEV_ID_82541ER_LOM:
782 case E1000_DEV_ID_82541GI:
783 case E1000_DEV_ID_82541GI_LF:
784 case E1000_DEV_ID_82541GI_MOBILE:
785 case E1000_DEV_ID_82544EI_COPPER:
786 case E1000_DEV_ID_82544EI_FIBER:
787 case E1000_DEV_ID_82544GC_COPPER:
788 case E1000_DEV_ID_82544GC_LOM:
789 case E1000_DEV_ID_82545EM_COPPER:
790 case E1000_DEV_ID_82545EM_FIBER:
791 case E1000_DEV_ID_82546EB_COPPER:
792 case E1000_DEV_ID_82546EB_FIBER:
793 case E1000_DEV_ID_82546EB_QUAD_COPPER:
794 return true;
795 default:
796 return false;
797 }
798 }
799
800 static const struct net_device_ops e1000_netdev_ops = {
801 .ndo_open = e1000_open,
802 .ndo_stop = e1000_close,
803 .ndo_start_xmit = e1000_xmit_frame,
804 .ndo_get_stats = e1000_get_stats,
805 .ndo_set_rx_mode = e1000_set_rx_mode,
806 .ndo_set_mac_address = e1000_set_mac,
807 .ndo_tx_timeout = e1000_tx_timeout,
808 .ndo_change_mtu = e1000_change_mtu,
809 .ndo_do_ioctl = e1000_ioctl,
810 .ndo_validate_addr = eth_validate_addr,
811
812 .ndo_vlan_rx_register = e1000_vlan_rx_register,
813 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
814 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
815 #ifdef CONFIG_NET_POLL_CONTROLLER
816 .ndo_poll_controller = e1000_netpoll,
817 #endif
818 };
819
820 /**
821 * e1000_init_hw_struct - initialize members of hw struct
822 * @adapter: board private struct
823 * @hw: structure used by e1000_hw.c
824 *
825 * Factors out initialization of the e1000_hw struct to its own function
826 * that can be called very early at init (just after struct allocation).
827 * Fields are initialized based on PCI device information and
828 * OS network device settings (MTU size).
829 * Returns negative error codes if MAC type setup fails.
830 */
831 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
832 struct e1000_hw *hw)
833 {
834 struct pci_dev *pdev = adapter->pdev;
835
836 /* PCI config space info */
837 hw->vendor_id = pdev->vendor;
838 hw->device_id = pdev->device;
839 hw->subsystem_vendor_id = pdev->subsystem_vendor;
840 hw->subsystem_id = pdev->subsystem_device;
841 hw->revision_id = pdev->revision;
842
843 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
844
845 hw->max_frame_size = adapter->netdev->mtu +
846 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
847 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
848
849 /* identify the MAC */
850 if (e1000_set_mac_type(hw)) {
851 e_err(probe, "Unknown MAC Type\n");
852 return -EIO;
853 }
854
855 switch (hw->mac_type) {
856 default:
857 break;
858 case e1000_82541:
859 case e1000_82547:
860 case e1000_82541_rev_2:
861 case e1000_82547_rev_2:
862 hw->phy_init_script = 1;
863 break;
864 }
865
866 e1000_set_media_type(hw);
867 e1000_get_bus_info(hw);
868
869 hw->wait_autoneg_complete = false;
870 hw->tbi_compatibility_en = true;
871 hw->adaptive_ifs = true;
872
873 /* Copper options */
874
875 if (hw->media_type == e1000_media_type_copper) {
876 hw->mdix = AUTO_ALL_MODES;
877 hw->disable_polarity_correction = false;
878 hw->master_slave = E1000_MASTER_SLAVE;
879 }
880
881 return 0;
882 }
883
884 /**
885 * e1000_probe - Device Initialization Routine
886 * @pdev: PCI device information struct
887 * @ent: entry in e1000_pci_tbl
888 *
889 * Returns 0 on success, negative on failure
890 *
891 * e1000_probe initializes an adapter identified by a pci_dev structure.
892 * The OS initialization, configuring of the adapter private structure,
893 * and a hardware reset occur.
894 **/
895 static int __devinit e1000_probe(struct pci_dev *pdev,
896 const struct pci_device_id *ent)
897 {
898 struct net_device *netdev;
899 struct e1000_adapter *adapter;
900 struct e1000_hw *hw;
901
902 static int cards_found = 0;
903 static int global_quad_port_a = 0; /* global ksp3 port a indication */
904 int i, err, pci_using_dac;
905 u16 eeprom_data = 0;
906 u16 tmp = 0;
907 u16 eeprom_apme_mask = E1000_EEPROM_APME;
908 int bars, need_ioport;
909
910 /* do not allocate ioport bars when not needed */
911 need_ioport = e1000_is_need_ioport(pdev);
912 if (need_ioport) {
913 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
914 err = pci_enable_device(pdev);
915 } else {
916 bars = pci_select_bars(pdev, IORESOURCE_MEM);
917 err = pci_enable_device_mem(pdev);
918 }
919 if (err)
920 return err;
921
922 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
923 if (err)
924 goto err_pci_reg;
925
926 pci_set_master(pdev);
927 err = pci_save_state(pdev);
928 if (err)
929 goto err_alloc_etherdev;
930
931 err = -ENOMEM;
932 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
933 if (!netdev)
934 goto err_alloc_etherdev;
935
936 SET_NETDEV_DEV(netdev, &pdev->dev);
937
938 pci_set_drvdata(pdev, netdev);
939 adapter = netdev_priv(netdev);
940 adapter->netdev = netdev;
941 adapter->pdev = pdev;
942 adapter->msg_enable = (1 << debug) - 1;
943 adapter->bars = bars;
944 adapter->need_ioport = need_ioport;
945
946 hw = &adapter->hw;
947 hw->back = adapter;
948
949 err = -EIO;
950 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
951 if (!hw->hw_addr)
952 goto err_ioremap;
953
954 if (adapter->need_ioport) {
955 for (i = BAR_1; i <= BAR_5; i++) {
956 if (pci_resource_len(pdev, i) == 0)
957 continue;
958 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
959 hw->io_base = pci_resource_start(pdev, i);
960 break;
961 }
962 }
963 }
964
965 /* make ready for any if (hw->...) below */
966 err = e1000_init_hw_struct(adapter, hw);
967 if (err)
968 goto err_sw_init;
969
970 /*
971 * there is a workaround being applied below that limits
972 * 64-bit DMA addresses to 64-bit hardware. There are some
973 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
974 */
975 pci_using_dac = 0;
976 if ((hw->bus_type == e1000_bus_type_pcix) &&
977 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
978 /*
979 * according to DMA-API-HOWTO, coherent calls will always
980 * succeed if the set call did
981 */
982 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
983 pci_using_dac = 1;
984 } else {
985 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
986 if (err) {
987 pr_err("No usable DMA config, aborting\n");
988 goto err_dma;
989 }
990 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
991 }
992
993 netdev->netdev_ops = &e1000_netdev_ops;
994 e1000_set_ethtool_ops(netdev);
995 netdev->watchdog_timeo = 5 * HZ;
996 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
997
998 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
999
1000 adapter->bd_number = cards_found;
1001
1002 /* setup the private structure */
1003
1004 err = e1000_sw_init(adapter);
1005 if (err)
1006 goto err_sw_init;
1007
1008 err = -EIO;
1009 if (hw->mac_type == e1000_ce4100) {
1010 ce4100_gbe_mdio_base_phy = pci_resource_start(pdev, BAR_1);
1011 ce4100_gbe_mdio_base_virt = ioremap(ce4100_gbe_mdio_base_phy,
1012 pci_resource_len(pdev, BAR_1));
1013
1014 if (!ce4100_gbe_mdio_base_virt)
1015 goto err_mdio_ioremap;
1016 }
1017
1018 if (hw->mac_type >= e1000_82543) {
1019 netdev->features = NETIF_F_SG |
1020 NETIF_F_HW_CSUM |
1021 NETIF_F_HW_VLAN_TX |
1022 NETIF_F_HW_VLAN_RX |
1023 NETIF_F_HW_VLAN_FILTER;
1024 }
1025
1026 if ((hw->mac_type >= e1000_82544) &&
1027 (hw->mac_type != e1000_82547))
1028 netdev->features |= NETIF_F_TSO;
1029
1030 if (pci_using_dac) {
1031 netdev->features |= NETIF_F_HIGHDMA;
1032 netdev->vlan_features |= NETIF_F_HIGHDMA;
1033 }
1034
1035 netdev->vlan_features |= NETIF_F_TSO;
1036 netdev->vlan_features |= NETIF_F_HW_CSUM;
1037 netdev->vlan_features |= NETIF_F_SG;
1038
1039 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1040
1041 /* initialize eeprom parameters */
1042 if (e1000_init_eeprom_params(hw)) {
1043 e_err(probe, "EEPROM initialization failed\n");
1044 goto err_eeprom;
1045 }
1046
1047 /* before reading the EEPROM, reset the controller to
1048 * put the device in a known good starting state */
1049
1050 e1000_reset_hw(hw);
1051
1052 /* make sure the EEPROM is good */
1053 if (e1000_validate_eeprom_checksum(hw) < 0) {
1054 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1055 e1000_dump_eeprom(adapter);
1056 /*
1057 * set MAC address to all zeroes to invalidate and temporary
1058 * disable this device for the user. This blocks regular
1059 * traffic while still permitting ethtool ioctls from reaching
1060 * the hardware as well as allowing the user to run the
1061 * interface after manually setting a hw addr using
1062 * `ip set address`
1063 */
1064 memset(hw->mac_addr, 0, netdev->addr_len);
1065 } else {
1066 /* copy the MAC address out of the EEPROM */
1067 if (e1000_read_mac_addr(hw))
1068 e_err(probe, "EEPROM Read Error\n");
1069 }
1070 /* don't block initalization here due to bad MAC address */
1071 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1072 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1073
1074 if (!is_valid_ether_addr(netdev->perm_addr))
1075 e_err(probe, "Invalid MAC Address\n");
1076
1077 init_timer(&adapter->tx_fifo_stall_timer);
1078 adapter->tx_fifo_stall_timer.function = e1000_82547_tx_fifo_stall;
1079 adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
1080
1081 init_timer(&adapter->watchdog_timer);
1082 adapter->watchdog_timer.function = e1000_watchdog;
1083 adapter->watchdog_timer.data = (unsigned long) adapter;
1084
1085 init_timer(&adapter->phy_info_timer);
1086 adapter->phy_info_timer.function = e1000_update_phy_info;
1087 adapter->phy_info_timer.data = (unsigned long)adapter;
1088
1089 INIT_WORK(&adapter->fifo_stall_task, e1000_82547_tx_fifo_stall_task);
1090 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1091 INIT_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1092
1093 e1000_check_options(adapter);
1094
1095 /* Initial Wake on LAN setting
1096 * If APM wake is enabled in the EEPROM,
1097 * enable the ACPI Magic Packet filter
1098 */
1099
1100 switch (hw->mac_type) {
1101 case e1000_82542_rev2_0:
1102 case e1000_82542_rev2_1:
1103 case e1000_82543:
1104 break;
1105 case e1000_82544:
1106 e1000_read_eeprom(hw,
1107 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1108 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1109 break;
1110 case e1000_82546:
1111 case e1000_82546_rev_3:
1112 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1113 e1000_read_eeprom(hw,
1114 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1115 break;
1116 }
1117 /* Fall Through */
1118 default:
1119 e1000_read_eeprom(hw,
1120 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1121 break;
1122 }
1123 if (eeprom_data & eeprom_apme_mask)
1124 adapter->eeprom_wol |= E1000_WUFC_MAG;
1125
1126 /* now that we have the eeprom settings, apply the special cases
1127 * where the eeprom may be wrong or the board simply won't support
1128 * wake on lan on a particular port */
1129 switch (pdev->device) {
1130 case E1000_DEV_ID_82546GB_PCIE:
1131 adapter->eeprom_wol = 0;
1132 break;
1133 case E1000_DEV_ID_82546EB_FIBER:
1134 case E1000_DEV_ID_82546GB_FIBER:
1135 /* Wake events only supported on port A for dual fiber
1136 * regardless of eeprom setting */
1137 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1138 adapter->eeprom_wol = 0;
1139 break;
1140 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1141 /* if quad port adapter, disable WoL on all but port A */
1142 if (global_quad_port_a != 0)
1143 adapter->eeprom_wol = 0;
1144 else
1145 adapter->quad_port_a = 1;
1146 /* Reset for multiple quad port adapters */
1147 if (++global_quad_port_a == 4)
1148 global_quad_port_a = 0;
1149 break;
1150 }
1151
1152 /* initialize the wol settings based on the eeprom settings */
1153 adapter->wol = adapter->eeprom_wol;
1154 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1155
1156 /* Auto detect PHY address */
1157 if (hw->mac_type == e1000_ce4100) {
1158 for (i = 0; i < 32; i++) {
1159 hw->phy_addr = i;
1160 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1161 if (tmp == 0 || tmp == 0xFF) {
1162 if (i == 31)
1163 goto err_eeprom;
1164 continue;
1165 } else
1166 break;
1167 }
1168 }
1169
1170 /* reset the hardware with the new settings */
1171 e1000_reset(adapter);
1172
1173 strcpy(netdev->name, "eth%d");
1174 err = register_netdev(netdev);
1175 if (err)
1176 goto err_register;
1177
1178 /* print bus type/speed/width info */
1179 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1180 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1181 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1182 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1183 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1184 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1185 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1186 netdev->dev_addr);
1187
1188 /* carrier off reporting is important to ethtool even BEFORE open */
1189 netif_carrier_off(netdev);
1190
1191 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1192
1193 cards_found++;
1194 return 0;
1195
1196 err_register:
1197 err_eeprom:
1198 e1000_phy_hw_reset(hw);
1199
1200 if (hw->flash_address)
1201 iounmap(hw->flash_address);
1202 kfree(adapter->tx_ring);
1203 kfree(adapter->rx_ring);
1204 err_dma:
1205 err_sw_init:
1206 err_mdio_ioremap:
1207 iounmap(ce4100_gbe_mdio_base_virt);
1208 iounmap(hw->hw_addr);
1209 err_ioremap:
1210 free_netdev(netdev);
1211 err_alloc_etherdev:
1212 pci_release_selected_regions(pdev, bars);
1213 err_pci_reg:
1214 pci_disable_device(pdev);
1215 return err;
1216 }
1217
1218 /**
1219 * e1000_remove - Device Removal Routine
1220 * @pdev: PCI device information struct
1221 *
1222 * e1000_remove is called by the PCI subsystem to alert the driver
1223 * that it should release a PCI device. The could be caused by a
1224 * Hot-Plug event, or because the driver is going to be removed from
1225 * memory.
1226 **/
1227
1228 static void __devexit e1000_remove(struct pci_dev *pdev)
1229 {
1230 struct net_device *netdev = pci_get_drvdata(pdev);
1231 struct e1000_adapter *adapter = netdev_priv(netdev);
1232 struct e1000_hw *hw = &adapter->hw;
1233
1234 set_bit(__E1000_DOWN, &adapter->flags);
1235 del_timer_sync(&adapter->tx_fifo_stall_timer);
1236 del_timer_sync(&adapter->watchdog_timer);
1237 del_timer_sync(&adapter->phy_info_timer);
1238
1239 cancel_work_sync(&adapter->reset_task);
1240
1241 e1000_release_manageability(adapter);
1242
1243 unregister_netdev(netdev);
1244
1245 e1000_phy_hw_reset(hw);
1246
1247 kfree(adapter->tx_ring);
1248 kfree(adapter->rx_ring);
1249
1250 iounmap(hw->hw_addr);
1251 if (hw->flash_address)
1252 iounmap(hw->flash_address);
1253 pci_release_selected_regions(pdev, adapter->bars);
1254
1255 free_netdev(netdev);
1256
1257 pci_disable_device(pdev);
1258 }
1259
1260 /**
1261 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1262 * @adapter: board private structure to initialize
1263 *
1264 * e1000_sw_init initializes the Adapter private data structure.
1265 * e1000_init_hw_struct MUST be called before this function
1266 **/
1267
1268 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1269 {
1270 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1271
1272 adapter->num_tx_queues = 1;
1273 adapter->num_rx_queues = 1;
1274
1275 if (e1000_alloc_queues(adapter)) {
1276 e_err(probe, "Unable to allocate memory for queues\n");
1277 return -ENOMEM;
1278 }
1279
1280 /* Explicitly disable IRQ since the NIC can be in any state. */
1281 e1000_irq_disable(adapter);
1282
1283 spin_lock_init(&adapter->stats_lock);
1284
1285 set_bit(__E1000_DOWN, &adapter->flags);
1286
1287 return 0;
1288 }
1289
1290 /**
1291 * e1000_alloc_queues - Allocate memory for all rings
1292 * @adapter: board private structure to initialize
1293 *
1294 * We allocate one ring per queue at run-time since we don't know the
1295 * number of queues at compile-time.
1296 **/
1297
1298 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1299 {
1300 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1301 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1302 if (!adapter->tx_ring)
1303 return -ENOMEM;
1304
1305 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1306 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1307 if (!adapter->rx_ring) {
1308 kfree(adapter->tx_ring);
1309 return -ENOMEM;
1310 }
1311
1312 return E1000_SUCCESS;
1313 }
1314
1315 /**
1316 * e1000_open - Called when a network interface is made active
1317 * @netdev: network interface device structure
1318 *
1319 * Returns 0 on success, negative value on failure
1320 *
1321 * The open entry point is called when a network interface is made
1322 * active by the system (IFF_UP). At this point all resources needed
1323 * for transmit and receive operations are allocated, the interrupt
1324 * handler is registered with the OS, the watchdog timer is started,
1325 * and the stack is notified that the interface is ready.
1326 **/
1327
1328 static int e1000_open(struct net_device *netdev)
1329 {
1330 struct e1000_adapter *adapter = netdev_priv(netdev);
1331 struct e1000_hw *hw = &adapter->hw;
1332 int err;
1333
1334 /* disallow open during test */
1335 if (test_bit(__E1000_TESTING, &adapter->flags))
1336 return -EBUSY;
1337
1338 netif_carrier_off(netdev);
1339
1340 /* allocate transmit descriptors */
1341 err = e1000_setup_all_tx_resources(adapter);
1342 if (err)
1343 goto err_setup_tx;
1344
1345 /* allocate receive descriptors */
1346 err = e1000_setup_all_rx_resources(adapter);
1347 if (err)
1348 goto err_setup_rx;
1349
1350 e1000_power_up_phy(adapter);
1351
1352 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1353 if ((hw->mng_cookie.status &
1354 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1355 e1000_update_mng_vlan(adapter);
1356 }
1357
1358 /* before we allocate an interrupt, we must be ready to handle it.
1359 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1360 * as soon as we call pci_request_irq, so we have to setup our
1361 * clean_rx handler before we do so. */
1362 e1000_configure(adapter);
1363
1364 err = e1000_request_irq(adapter);
1365 if (err)
1366 goto err_req_irq;
1367
1368 /* From here on the code is the same as e1000_up() */
1369 clear_bit(__E1000_DOWN, &adapter->flags);
1370
1371 napi_enable(&adapter->napi);
1372
1373 e1000_irq_enable(adapter);
1374
1375 netif_start_queue(netdev);
1376
1377 /* fire a link status change interrupt to start the watchdog */
1378 ew32(ICS, E1000_ICS_LSC);
1379
1380 return E1000_SUCCESS;
1381
1382 err_req_irq:
1383 e1000_power_down_phy(adapter);
1384 e1000_free_all_rx_resources(adapter);
1385 err_setup_rx:
1386 e1000_free_all_tx_resources(adapter);
1387 err_setup_tx:
1388 e1000_reset(adapter);
1389
1390 return err;
1391 }
1392
1393 /**
1394 * e1000_close - Disables a network interface
1395 * @netdev: network interface device structure
1396 *
1397 * Returns 0, this is not allowed to fail
1398 *
1399 * The close entry point is called when an interface is de-activated
1400 * by the OS. The hardware is still under the drivers control, but
1401 * needs to be disabled. A global MAC reset is issued to stop the
1402 * hardware, and all transmit and receive resources are freed.
1403 **/
1404
1405 static int e1000_close(struct net_device *netdev)
1406 {
1407 struct e1000_adapter *adapter = netdev_priv(netdev);
1408 struct e1000_hw *hw = &adapter->hw;
1409
1410 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1411 e1000_down(adapter);
1412 e1000_power_down_phy(adapter);
1413 e1000_free_irq(adapter);
1414
1415 e1000_free_all_tx_resources(adapter);
1416 e1000_free_all_rx_resources(adapter);
1417
1418 /* kill manageability vlan ID if supported, but not if a vlan with
1419 * the same ID is registered on the host OS (let 8021q kill it) */
1420 if ((hw->mng_cookie.status &
1421 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1422 !(adapter->vlgrp &&
1423 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1424 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1425 }
1426
1427 return 0;
1428 }
1429
1430 /**
1431 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1432 * @adapter: address of board private structure
1433 * @start: address of beginning of memory
1434 * @len: length of memory
1435 **/
1436 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1437 unsigned long len)
1438 {
1439 struct e1000_hw *hw = &adapter->hw;
1440 unsigned long begin = (unsigned long)start;
1441 unsigned long end = begin + len;
1442
1443 /* First rev 82545 and 82546 need to not allow any memory
1444 * write location to cross 64k boundary due to errata 23 */
1445 if (hw->mac_type == e1000_82545 ||
1446 hw->mac_type == e1000_ce4100 ||
1447 hw->mac_type == e1000_82546) {
1448 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1449 }
1450
1451 return true;
1452 }
1453
1454 /**
1455 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1456 * @adapter: board private structure
1457 * @txdr: tx descriptor ring (for a specific queue) to setup
1458 *
1459 * Return 0 on success, negative on failure
1460 **/
1461
1462 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1463 struct e1000_tx_ring *txdr)
1464 {
1465 struct pci_dev *pdev = adapter->pdev;
1466 int size;
1467
1468 size = sizeof(struct e1000_buffer) * txdr->count;
1469 txdr->buffer_info = vzalloc(size);
1470 if (!txdr->buffer_info) {
1471 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1472 "ring\n");
1473 return -ENOMEM;
1474 }
1475
1476 /* round up to nearest 4K */
1477
1478 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1479 txdr->size = ALIGN(txdr->size, 4096);
1480
1481 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1482 GFP_KERNEL);
1483 if (!txdr->desc) {
1484 setup_tx_desc_die:
1485 vfree(txdr->buffer_info);
1486 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1487 "ring\n");
1488 return -ENOMEM;
1489 }
1490
1491 /* Fix for errata 23, can't cross 64kB boundary */
1492 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1493 void *olddesc = txdr->desc;
1494 dma_addr_t olddma = txdr->dma;
1495 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1496 txdr->size, txdr->desc);
1497 /* Try again, without freeing the previous */
1498 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1499 &txdr->dma, GFP_KERNEL);
1500 /* Failed allocation, critical failure */
1501 if (!txdr->desc) {
1502 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1503 olddma);
1504 goto setup_tx_desc_die;
1505 }
1506
1507 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1508 /* give up */
1509 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1510 txdr->dma);
1511 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1512 olddma);
1513 e_err(probe, "Unable to allocate aligned memory "
1514 "for the transmit descriptor ring\n");
1515 vfree(txdr->buffer_info);
1516 return -ENOMEM;
1517 } else {
1518 /* Free old allocation, new allocation was successful */
1519 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1520 olddma);
1521 }
1522 }
1523 memset(txdr->desc, 0, txdr->size);
1524
1525 txdr->next_to_use = 0;
1526 txdr->next_to_clean = 0;
1527
1528 return 0;
1529 }
1530
1531 /**
1532 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1533 * (Descriptors) for all queues
1534 * @adapter: board private structure
1535 *
1536 * Return 0 on success, negative on failure
1537 **/
1538
1539 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1540 {
1541 int i, err = 0;
1542
1543 for (i = 0; i < adapter->num_tx_queues; i++) {
1544 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1545 if (err) {
1546 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1547 for (i-- ; i >= 0; i--)
1548 e1000_free_tx_resources(adapter,
1549 &adapter->tx_ring[i]);
1550 break;
1551 }
1552 }
1553
1554 return err;
1555 }
1556
1557 /**
1558 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1559 * @adapter: board private structure
1560 *
1561 * Configure the Tx unit of the MAC after a reset.
1562 **/
1563
1564 static void e1000_configure_tx(struct e1000_adapter *adapter)
1565 {
1566 u64 tdba;
1567 struct e1000_hw *hw = &adapter->hw;
1568 u32 tdlen, tctl, tipg;
1569 u32 ipgr1, ipgr2;
1570
1571 /* Setup the HW Tx Head and Tail descriptor pointers */
1572
1573 switch (adapter->num_tx_queues) {
1574 case 1:
1575 default:
1576 tdba = adapter->tx_ring[0].dma;
1577 tdlen = adapter->tx_ring[0].count *
1578 sizeof(struct e1000_tx_desc);
1579 ew32(TDLEN, tdlen);
1580 ew32(TDBAH, (tdba >> 32));
1581 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1582 ew32(TDT, 0);
1583 ew32(TDH, 0);
1584 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1585 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1586 break;
1587 }
1588
1589 /* Set the default values for the Tx Inter Packet Gap timer */
1590 if ((hw->media_type == e1000_media_type_fiber ||
1591 hw->media_type == e1000_media_type_internal_serdes))
1592 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1593 else
1594 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1595
1596 switch (hw->mac_type) {
1597 case e1000_82542_rev2_0:
1598 case e1000_82542_rev2_1:
1599 tipg = DEFAULT_82542_TIPG_IPGT;
1600 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1601 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1602 break;
1603 default:
1604 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1605 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1606 break;
1607 }
1608 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1609 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1610 ew32(TIPG, tipg);
1611
1612 /* Set the Tx Interrupt Delay register */
1613
1614 ew32(TIDV, adapter->tx_int_delay);
1615 if (hw->mac_type >= e1000_82540)
1616 ew32(TADV, adapter->tx_abs_int_delay);
1617
1618 /* Program the Transmit Control Register */
1619
1620 tctl = er32(TCTL);
1621 tctl &= ~E1000_TCTL_CT;
1622 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1623 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1624
1625 e1000_config_collision_dist(hw);
1626
1627 /* Setup Transmit Descriptor Settings for eop descriptor */
1628 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1629
1630 /* only set IDE if we are delaying interrupts using the timers */
1631 if (adapter->tx_int_delay)
1632 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1633
1634 if (hw->mac_type < e1000_82543)
1635 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1636 else
1637 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1638
1639 /* Cache if we're 82544 running in PCI-X because we'll
1640 * need this to apply a workaround later in the send path. */
1641 if (hw->mac_type == e1000_82544 &&
1642 hw->bus_type == e1000_bus_type_pcix)
1643 adapter->pcix_82544 = 1;
1644
1645 ew32(TCTL, tctl);
1646
1647 }
1648
1649 /**
1650 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1651 * @adapter: board private structure
1652 * @rxdr: rx descriptor ring (for a specific queue) to setup
1653 *
1654 * Returns 0 on success, negative on failure
1655 **/
1656
1657 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1658 struct e1000_rx_ring *rxdr)
1659 {
1660 struct pci_dev *pdev = adapter->pdev;
1661 int size, desc_len;
1662
1663 size = sizeof(struct e1000_buffer) * rxdr->count;
1664 rxdr->buffer_info = vzalloc(size);
1665 if (!rxdr->buffer_info) {
1666 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1667 "ring\n");
1668 return -ENOMEM;
1669 }
1670
1671 desc_len = sizeof(struct e1000_rx_desc);
1672
1673 /* Round up to nearest 4K */
1674
1675 rxdr->size = rxdr->count * desc_len;
1676 rxdr->size = ALIGN(rxdr->size, 4096);
1677
1678 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1679 GFP_KERNEL);
1680
1681 if (!rxdr->desc) {
1682 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1683 "ring\n");
1684 setup_rx_desc_die:
1685 vfree(rxdr->buffer_info);
1686 return -ENOMEM;
1687 }
1688
1689 /* Fix for errata 23, can't cross 64kB boundary */
1690 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1691 void *olddesc = rxdr->desc;
1692 dma_addr_t olddma = rxdr->dma;
1693 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1694 rxdr->size, rxdr->desc);
1695 /* Try again, without freeing the previous */
1696 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1697 &rxdr->dma, GFP_KERNEL);
1698 /* Failed allocation, critical failure */
1699 if (!rxdr->desc) {
1700 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1701 olddma);
1702 e_err(probe, "Unable to allocate memory for the Rx "
1703 "descriptor ring\n");
1704 goto setup_rx_desc_die;
1705 }
1706
1707 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1708 /* give up */
1709 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1710 rxdr->dma);
1711 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1712 olddma);
1713 e_err(probe, "Unable to allocate aligned memory for "
1714 "the Rx descriptor ring\n");
1715 goto setup_rx_desc_die;
1716 } else {
1717 /* Free old allocation, new allocation was successful */
1718 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1719 olddma);
1720 }
1721 }
1722 memset(rxdr->desc, 0, rxdr->size);
1723
1724 rxdr->next_to_clean = 0;
1725 rxdr->next_to_use = 0;
1726 rxdr->rx_skb_top = NULL;
1727
1728 return 0;
1729 }
1730
1731 /**
1732 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1733 * (Descriptors) for all queues
1734 * @adapter: board private structure
1735 *
1736 * Return 0 on success, negative on failure
1737 **/
1738
1739 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1740 {
1741 int i, err = 0;
1742
1743 for (i = 0; i < adapter->num_rx_queues; i++) {
1744 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1745 if (err) {
1746 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1747 for (i-- ; i >= 0; i--)
1748 e1000_free_rx_resources(adapter,
1749 &adapter->rx_ring[i]);
1750 break;
1751 }
1752 }
1753
1754 return err;
1755 }
1756
1757 /**
1758 * e1000_setup_rctl - configure the receive control registers
1759 * @adapter: Board private structure
1760 **/
1761 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1762 {
1763 struct e1000_hw *hw = &adapter->hw;
1764 u32 rctl;
1765
1766 rctl = er32(RCTL);
1767
1768 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1769
1770 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1771 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1772 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1773
1774 if (hw->tbi_compatibility_on == 1)
1775 rctl |= E1000_RCTL_SBP;
1776 else
1777 rctl &= ~E1000_RCTL_SBP;
1778
1779 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1780 rctl &= ~E1000_RCTL_LPE;
1781 else
1782 rctl |= E1000_RCTL_LPE;
1783
1784 /* Setup buffer sizes */
1785 rctl &= ~E1000_RCTL_SZ_4096;
1786 rctl |= E1000_RCTL_BSEX;
1787 switch (adapter->rx_buffer_len) {
1788 case E1000_RXBUFFER_2048:
1789 default:
1790 rctl |= E1000_RCTL_SZ_2048;
1791 rctl &= ~E1000_RCTL_BSEX;
1792 break;
1793 case E1000_RXBUFFER_4096:
1794 rctl |= E1000_RCTL_SZ_4096;
1795 break;
1796 case E1000_RXBUFFER_8192:
1797 rctl |= E1000_RCTL_SZ_8192;
1798 break;
1799 case E1000_RXBUFFER_16384:
1800 rctl |= E1000_RCTL_SZ_16384;
1801 break;
1802 }
1803
1804 ew32(RCTL, rctl);
1805 }
1806
1807 /**
1808 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1809 * @adapter: board private structure
1810 *
1811 * Configure the Rx unit of the MAC after a reset.
1812 **/
1813
1814 static void e1000_configure_rx(struct e1000_adapter *adapter)
1815 {
1816 u64 rdba;
1817 struct e1000_hw *hw = &adapter->hw;
1818 u32 rdlen, rctl, rxcsum;
1819
1820 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1821 rdlen = adapter->rx_ring[0].count *
1822 sizeof(struct e1000_rx_desc);
1823 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1824 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1825 } else {
1826 rdlen = adapter->rx_ring[0].count *
1827 sizeof(struct e1000_rx_desc);
1828 adapter->clean_rx = e1000_clean_rx_irq;
1829 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1830 }
1831
1832 /* disable receives while setting up the descriptors */
1833 rctl = er32(RCTL);
1834 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1835
1836 /* set the Receive Delay Timer Register */
1837 ew32(RDTR, adapter->rx_int_delay);
1838
1839 if (hw->mac_type >= e1000_82540) {
1840 ew32(RADV, adapter->rx_abs_int_delay);
1841 if (adapter->itr_setting != 0)
1842 ew32(ITR, 1000000000 / (adapter->itr * 256));
1843 }
1844
1845 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1846 * the Base and Length of the Rx Descriptor Ring */
1847 switch (adapter->num_rx_queues) {
1848 case 1:
1849 default:
1850 rdba = adapter->rx_ring[0].dma;
1851 ew32(RDLEN, rdlen);
1852 ew32(RDBAH, (rdba >> 32));
1853 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1854 ew32(RDT, 0);
1855 ew32(RDH, 0);
1856 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1857 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1858 break;
1859 }
1860
1861 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1862 if (hw->mac_type >= e1000_82543) {
1863 rxcsum = er32(RXCSUM);
1864 if (adapter->rx_csum)
1865 rxcsum |= E1000_RXCSUM_TUOFL;
1866 else
1867 /* don't need to clear IPPCSE as it defaults to 0 */
1868 rxcsum &= ~E1000_RXCSUM_TUOFL;
1869 ew32(RXCSUM, rxcsum);
1870 }
1871
1872 /* Enable Receives */
1873 ew32(RCTL, rctl);
1874 }
1875
1876 /**
1877 * e1000_free_tx_resources - Free Tx Resources per Queue
1878 * @adapter: board private structure
1879 * @tx_ring: Tx descriptor ring for a specific queue
1880 *
1881 * Free all transmit software resources
1882 **/
1883
1884 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1885 struct e1000_tx_ring *tx_ring)
1886 {
1887 struct pci_dev *pdev = adapter->pdev;
1888
1889 e1000_clean_tx_ring(adapter, tx_ring);
1890
1891 vfree(tx_ring->buffer_info);
1892 tx_ring->buffer_info = NULL;
1893
1894 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1895 tx_ring->dma);
1896
1897 tx_ring->desc = NULL;
1898 }
1899
1900 /**
1901 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1902 * @adapter: board private structure
1903 *
1904 * Free all transmit software resources
1905 **/
1906
1907 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1908 {
1909 int i;
1910
1911 for (i = 0; i < adapter->num_tx_queues; i++)
1912 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1913 }
1914
1915 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1916 struct e1000_buffer *buffer_info)
1917 {
1918 if (buffer_info->dma) {
1919 if (buffer_info->mapped_as_page)
1920 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1921 buffer_info->length, DMA_TO_DEVICE);
1922 else
1923 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1924 buffer_info->length,
1925 DMA_TO_DEVICE);
1926 buffer_info->dma = 0;
1927 }
1928 if (buffer_info->skb) {
1929 dev_kfree_skb_any(buffer_info->skb);
1930 buffer_info->skb = NULL;
1931 }
1932 buffer_info->time_stamp = 0;
1933 /* buffer_info must be completely set up in the transmit path */
1934 }
1935
1936 /**
1937 * e1000_clean_tx_ring - Free Tx Buffers
1938 * @adapter: board private structure
1939 * @tx_ring: ring to be cleaned
1940 **/
1941
1942 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1943 struct e1000_tx_ring *tx_ring)
1944 {
1945 struct e1000_hw *hw = &adapter->hw;
1946 struct e1000_buffer *buffer_info;
1947 unsigned long size;
1948 unsigned int i;
1949
1950 /* Free all the Tx ring sk_buffs */
1951
1952 for (i = 0; i < tx_ring->count; i++) {
1953 buffer_info = &tx_ring->buffer_info[i];
1954 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1955 }
1956
1957 size = sizeof(struct e1000_buffer) * tx_ring->count;
1958 memset(tx_ring->buffer_info, 0, size);
1959
1960 /* Zero out the descriptor ring */
1961
1962 memset(tx_ring->desc, 0, tx_ring->size);
1963
1964 tx_ring->next_to_use = 0;
1965 tx_ring->next_to_clean = 0;
1966 tx_ring->last_tx_tso = 0;
1967
1968 writel(0, hw->hw_addr + tx_ring->tdh);
1969 writel(0, hw->hw_addr + tx_ring->tdt);
1970 }
1971
1972 /**
1973 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1974 * @adapter: board private structure
1975 **/
1976
1977 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1978 {
1979 int i;
1980
1981 for (i = 0; i < adapter->num_tx_queues; i++)
1982 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1983 }
1984
1985 /**
1986 * e1000_free_rx_resources - Free Rx Resources
1987 * @adapter: board private structure
1988 * @rx_ring: ring to clean the resources from
1989 *
1990 * Free all receive software resources
1991 **/
1992
1993 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
1994 struct e1000_rx_ring *rx_ring)
1995 {
1996 struct pci_dev *pdev = adapter->pdev;
1997
1998 e1000_clean_rx_ring(adapter, rx_ring);
1999
2000 vfree(rx_ring->buffer_info);
2001 rx_ring->buffer_info = NULL;
2002
2003 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2004 rx_ring->dma);
2005
2006 rx_ring->desc = NULL;
2007 }
2008
2009 /**
2010 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2011 * @adapter: board private structure
2012 *
2013 * Free all receive software resources
2014 **/
2015
2016 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2017 {
2018 int i;
2019
2020 for (i = 0; i < adapter->num_rx_queues; i++)
2021 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2022 }
2023
2024 /**
2025 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2026 * @adapter: board private structure
2027 * @rx_ring: ring to free buffers from
2028 **/
2029
2030 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2031 struct e1000_rx_ring *rx_ring)
2032 {
2033 struct e1000_hw *hw = &adapter->hw;
2034 struct e1000_buffer *buffer_info;
2035 struct pci_dev *pdev = adapter->pdev;
2036 unsigned long size;
2037 unsigned int i;
2038
2039 /* Free all the Rx ring sk_buffs */
2040 for (i = 0; i < rx_ring->count; i++) {
2041 buffer_info = &rx_ring->buffer_info[i];
2042 if (buffer_info->dma &&
2043 adapter->clean_rx == e1000_clean_rx_irq) {
2044 dma_unmap_single(&pdev->dev, buffer_info->dma,
2045 buffer_info->length,
2046 DMA_FROM_DEVICE);
2047 } else if (buffer_info->dma &&
2048 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2049 dma_unmap_page(&pdev->dev, buffer_info->dma,
2050 buffer_info->length,
2051 DMA_FROM_DEVICE);
2052 }
2053
2054 buffer_info->dma = 0;
2055 if (buffer_info->page) {
2056 put_page(buffer_info->page);
2057 buffer_info->page = NULL;
2058 }
2059 if (buffer_info->skb) {
2060 dev_kfree_skb(buffer_info->skb);
2061 buffer_info->skb = NULL;
2062 }
2063 }
2064
2065 /* there also may be some cached data from a chained receive */
2066 if (rx_ring->rx_skb_top) {
2067 dev_kfree_skb(rx_ring->rx_skb_top);
2068 rx_ring->rx_skb_top = NULL;
2069 }
2070
2071 size = sizeof(struct e1000_buffer) * rx_ring->count;
2072 memset(rx_ring->buffer_info, 0, size);
2073
2074 /* Zero out the descriptor ring */
2075 memset(rx_ring->desc, 0, rx_ring->size);
2076
2077 rx_ring->next_to_clean = 0;
2078 rx_ring->next_to_use = 0;
2079
2080 writel(0, hw->hw_addr + rx_ring->rdh);
2081 writel(0, hw->hw_addr + rx_ring->rdt);
2082 }
2083
2084 /**
2085 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2086 * @adapter: board private structure
2087 **/
2088
2089 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2090 {
2091 int i;
2092
2093 for (i = 0; i < adapter->num_rx_queues; i++)
2094 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2095 }
2096
2097 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2098 * and memory write and invalidate disabled for certain operations
2099 */
2100 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2101 {
2102 struct e1000_hw *hw = &adapter->hw;
2103 struct net_device *netdev = adapter->netdev;
2104 u32 rctl;
2105
2106 e1000_pci_clear_mwi(hw);
2107
2108 rctl = er32(RCTL);
2109 rctl |= E1000_RCTL_RST;
2110 ew32(RCTL, rctl);
2111 E1000_WRITE_FLUSH();
2112 mdelay(5);
2113
2114 if (netif_running(netdev))
2115 e1000_clean_all_rx_rings(adapter);
2116 }
2117
2118 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2119 {
2120 struct e1000_hw *hw = &adapter->hw;
2121 struct net_device *netdev = adapter->netdev;
2122 u32 rctl;
2123
2124 rctl = er32(RCTL);
2125 rctl &= ~E1000_RCTL_RST;
2126 ew32(RCTL, rctl);
2127 E1000_WRITE_FLUSH();
2128 mdelay(5);
2129
2130 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2131 e1000_pci_set_mwi(hw);
2132
2133 if (netif_running(netdev)) {
2134 /* No need to loop, because 82542 supports only 1 queue */
2135 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2136 e1000_configure_rx(adapter);
2137 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2138 }
2139 }
2140
2141 /**
2142 * e1000_set_mac - Change the Ethernet Address of the NIC
2143 * @netdev: network interface device structure
2144 * @p: pointer to an address structure
2145 *
2146 * Returns 0 on success, negative on failure
2147 **/
2148
2149 static int e1000_set_mac(struct net_device *netdev, void *p)
2150 {
2151 struct e1000_adapter *adapter = netdev_priv(netdev);
2152 struct e1000_hw *hw = &adapter->hw;
2153 struct sockaddr *addr = p;
2154
2155 if (!is_valid_ether_addr(addr->sa_data))
2156 return -EADDRNOTAVAIL;
2157
2158 /* 82542 2.0 needs to be in reset to write receive address registers */
2159
2160 if (hw->mac_type == e1000_82542_rev2_0)
2161 e1000_enter_82542_rst(adapter);
2162
2163 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2164 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2165
2166 e1000_rar_set(hw, hw->mac_addr, 0);
2167
2168 if (hw->mac_type == e1000_82542_rev2_0)
2169 e1000_leave_82542_rst(adapter);
2170
2171 return 0;
2172 }
2173
2174 /**
2175 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2176 * @netdev: network interface device structure
2177 *
2178 * The set_rx_mode entry point is called whenever the unicast or multicast
2179 * address lists or the network interface flags are updated. This routine is
2180 * responsible for configuring the hardware for proper unicast, multicast,
2181 * promiscuous mode, and all-multi behavior.
2182 **/
2183
2184 static void e1000_set_rx_mode(struct net_device *netdev)
2185 {
2186 struct e1000_adapter *adapter = netdev_priv(netdev);
2187 struct e1000_hw *hw = &adapter->hw;
2188 struct netdev_hw_addr *ha;
2189 bool use_uc = false;
2190 u32 rctl;
2191 u32 hash_value;
2192 int i, rar_entries = E1000_RAR_ENTRIES;
2193 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2194 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2195
2196 if (!mcarray) {
2197 e_err(probe, "memory allocation failed\n");
2198 return;
2199 }
2200
2201 /* Check for Promiscuous and All Multicast modes */
2202
2203 rctl = er32(RCTL);
2204
2205 if (netdev->flags & IFF_PROMISC) {
2206 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2207 rctl &= ~E1000_RCTL_VFE;
2208 } else {
2209 if (netdev->flags & IFF_ALLMULTI)
2210 rctl |= E1000_RCTL_MPE;
2211 else
2212 rctl &= ~E1000_RCTL_MPE;
2213 /* Enable VLAN filter if there is a VLAN */
2214 if (adapter->vlgrp)
2215 rctl |= E1000_RCTL_VFE;
2216 }
2217
2218 if (netdev_uc_count(netdev) > rar_entries - 1) {
2219 rctl |= E1000_RCTL_UPE;
2220 } else if (!(netdev->flags & IFF_PROMISC)) {
2221 rctl &= ~E1000_RCTL_UPE;
2222 use_uc = true;
2223 }
2224
2225 ew32(RCTL, rctl);
2226
2227 /* 82542 2.0 needs to be in reset to write receive address registers */
2228
2229 if (hw->mac_type == e1000_82542_rev2_0)
2230 e1000_enter_82542_rst(adapter);
2231
2232 /* load the first 14 addresses into the exact filters 1-14. Unicast
2233 * addresses take precedence to avoid disabling unicast filtering
2234 * when possible.
2235 *
2236 * RAR 0 is used for the station MAC address
2237 * if there are not 14 addresses, go ahead and clear the filters
2238 */
2239 i = 1;
2240 if (use_uc)
2241 netdev_for_each_uc_addr(ha, netdev) {
2242 if (i == rar_entries)
2243 break;
2244 e1000_rar_set(hw, ha->addr, i++);
2245 }
2246
2247 netdev_for_each_mc_addr(ha, netdev) {
2248 if (i == rar_entries) {
2249 /* load any remaining addresses into the hash table */
2250 u32 hash_reg, hash_bit, mta;
2251 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2252 hash_reg = (hash_value >> 5) & 0x7F;
2253 hash_bit = hash_value & 0x1F;
2254 mta = (1 << hash_bit);
2255 mcarray[hash_reg] |= mta;
2256 } else {
2257 e1000_rar_set(hw, ha->addr, i++);
2258 }
2259 }
2260
2261 for (; i < rar_entries; i++) {
2262 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2263 E1000_WRITE_FLUSH();
2264 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2265 E1000_WRITE_FLUSH();
2266 }
2267
2268 /* write the hash table completely, write from bottom to avoid
2269 * both stupid write combining chipsets, and flushing each write */
2270 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2271 /*
2272 * If we are on an 82544 has an errata where writing odd
2273 * offsets overwrites the previous even offset, but writing
2274 * backwards over the range solves the issue by always
2275 * writing the odd offset first
2276 */
2277 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2278 }
2279 E1000_WRITE_FLUSH();
2280
2281 if (hw->mac_type == e1000_82542_rev2_0)
2282 e1000_leave_82542_rst(adapter);
2283
2284 kfree(mcarray);
2285 }
2286
2287 /* Need to wait a few seconds after link up to get diagnostic information from
2288 * the phy */
2289
2290 static void e1000_update_phy_info(unsigned long data)
2291 {
2292 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2293 schedule_work(&adapter->phy_info_task);
2294 }
2295
2296 static void e1000_update_phy_info_task(struct work_struct *work)
2297 {
2298 struct e1000_adapter *adapter = container_of(work,
2299 struct e1000_adapter,
2300 phy_info_task);
2301 struct e1000_hw *hw = &adapter->hw;
2302
2303 rtnl_lock();
2304 e1000_phy_get_info(hw, &adapter->phy_info);
2305 rtnl_unlock();
2306 }
2307
2308 /**
2309 * e1000_82547_tx_fifo_stall - Timer Call-back
2310 * @data: pointer to adapter cast into an unsigned long
2311 **/
2312 static void e1000_82547_tx_fifo_stall(unsigned long data)
2313 {
2314 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2315 schedule_work(&adapter->fifo_stall_task);
2316 }
2317
2318 /**
2319 * e1000_82547_tx_fifo_stall_task - task to complete work
2320 * @work: work struct contained inside adapter struct
2321 **/
2322 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2323 {
2324 struct e1000_adapter *adapter = container_of(work,
2325 struct e1000_adapter,
2326 fifo_stall_task);
2327 struct e1000_hw *hw = &adapter->hw;
2328 struct net_device *netdev = adapter->netdev;
2329 u32 tctl;
2330
2331 rtnl_lock();
2332 if (atomic_read(&adapter->tx_fifo_stall)) {
2333 if ((er32(TDT) == er32(TDH)) &&
2334 (er32(TDFT) == er32(TDFH)) &&
2335 (er32(TDFTS) == er32(TDFHS))) {
2336 tctl = er32(TCTL);
2337 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2338 ew32(TDFT, adapter->tx_head_addr);
2339 ew32(TDFH, adapter->tx_head_addr);
2340 ew32(TDFTS, adapter->tx_head_addr);
2341 ew32(TDFHS, adapter->tx_head_addr);
2342 ew32(TCTL, tctl);
2343 E1000_WRITE_FLUSH();
2344
2345 adapter->tx_fifo_head = 0;
2346 atomic_set(&adapter->tx_fifo_stall, 0);
2347 netif_wake_queue(netdev);
2348 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2349 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2350 }
2351 }
2352 rtnl_unlock();
2353 }
2354
2355 bool e1000_has_link(struct e1000_adapter *adapter)
2356 {
2357 struct e1000_hw *hw = &adapter->hw;
2358 bool link_active = false;
2359
2360 /* get_link_status is set on LSC (link status) interrupt or
2361 * rx sequence error interrupt. get_link_status will stay
2362 * false until the e1000_check_for_link establishes link
2363 * for copper adapters ONLY
2364 */
2365 switch (hw->media_type) {
2366 case e1000_media_type_copper:
2367 if (hw->get_link_status) {
2368 e1000_check_for_link(hw);
2369 link_active = !hw->get_link_status;
2370 } else {
2371 link_active = true;
2372 }
2373 break;
2374 case e1000_media_type_fiber:
2375 e1000_check_for_link(hw);
2376 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2377 break;
2378 case e1000_media_type_internal_serdes:
2379 e1000_check_for_link(hw);
2380 link_active = hw->serdes_has_link;
2381 break;
2382 default:
2383 break;
2384 }
2385
2386 return link_active;
2387 }
2388
2389 /**
2390 * e1000_watchdog - Timer Call-back
2391 * @data: pointer to adapter cast into an unsigned long
2392 **/
2393 static void e1000_watchdog(unsigned long data)
2394 {
2395 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2396 struct e1000_hw *hw = &adapter->hw;
2397 struct net_device *netdev = adapter->netdev;
2398 struct e1000_tx_ring *txdr = adapter->tx_ring;
2399 u32 link, tctl;
2400
2401 link = e1000_has_link(adapter);
2402 if ((netif_carrier_ok(netdev)) && link)
2403 goto link_up;
2404
2405 if (link) {
2406 if (!netif_carrier_ok(netdev)) {
2407 u32 ctrl;
2408 bool txb2b = true;
2409 /* update snapshot of PHY registers on LSC */
2410 e1000_get_speed_and_duplex(hw,
2411 &adapter->link_speed,
2412 &adapter->link_duplex);
2413
2414 ctrl = er32(CTRL);
2415 pr_info("%s NIC Link is Up %d Mbps %s, "
2416 "Flow Control: %s\n",
2417 netdev->name,
2418 adapter->link_speed,
2419 adapter->link_duplex == FULL_DUPLEX ?
2420 "Full Duplex" : "Half Duplex",
2421 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2422 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2423 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2424 E1000_CTRL_TFCE) ? "TX" : "None")));
2425
2426 /* adjust timeout factor according to speed/duplex */
2427 adapter->tx_timeout_factor = 1;
2428 switch (adapter->link_speed) {
2429 case SPEED_10:
2430 txb2b = false;
2431 adapter->tx_timeout_factor = 16;
2432 break;
2433 case SPEED_100:
2434 txb2b = false;
2435 /* maybe add some timeout factor ? */
2436 break;
2437 }
2438
2439 /* enable transmits in the hardware */
2440 tctl = er32(TCTL);
2441 tctl |= E1000_TCTL_EN;
2442 ew32(TCTL, tctl);
2443
2444 netif_carrier_on(netdev);
2445 if (!test_bit(__E1000_DOWN, &adapter->flags))
2446 mod_timer(&adapter->phy_info_timer,
2447 round_jiffies(jiffies + 2 * HZ));
2448 adapter->smartspeed = 0;
2449 }
2450 } else {
2451 if (netif_carrier_ok(netdev)) {
2452 adapter->link_speed = 0;
2453 adapter->link_duplex = 0;
2454 pr_info("%s NIC Link is Down\n",
2455 netdev->name);
2456 netif_carrier_off(netdev);
2457
2458 if (!test_bit(__E1000_DOWN, &adapter->flags))
2459 mod_timer(&adapter->phy_info_timer,
2460 round_jiffies(jiffies + 2 * HZ));
2461 }
2462
2463 e1000_smartspeed(adapter);
2464 }
2465
2466 link_up:
2467 e1000_update_stats(adapter);
2468
2469 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2470 adapter->tpt_old = adapter->stats.tpt;
2471 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2472 adapter->colc_old = adapter->stats.colc;
2473
2474 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2475 adapter->gorcl_old = adapter->stats.gorcl;
2476 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2477 adapter->gotcl_old = adapter->stats.gotcl;
2478
2479 e1000_update_adaptive(hw);
2480
2481 if (!netif_carrier_ok(netdev)) {
2482 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2483 /* We've lost link, so the controller stops DMA,
2484 * but we've got queued Tx work that's never going
2485 * to get done, so reset controller to flush Tx.
2486 * (Do the reset outside of interrupt context). */
2487 adapter->tx_timeout_count++;
2488 schedule_work(&adapter->reset_task);
2489 /* return immediately since reset is imminent */
2490 return;
2491 }
2492 }
2493
2494 /* Simple mode for Interrupt Throttle Rate (ITR) */
2495 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2496 /*
2497 * Symmetric Tx/Rx gets a reduced ITR=2000;
2498 * Total asymmetrical Tx or Rx gets ITR=8000;
2499 * everyone else is between 2000-8000.
2500 */
2501 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2502 u32 dif = (adapter->gotcl > adapter->gorcl ?
2503 adapter->gotcl - adapter->gorcl :
2504 adapter->gorcl - adapter->gotcl) / 10000;
2505 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2506
2507 ew32(ITR, 1000000000 / (itr * 256));
2508 }
2509
2510 /* Cause software interrupt to ensure rx ring is cleaned */
2511 ew32(ICS, E1000_ICS_RXDMT0);
2512
2513 /* Force detection of hung controller every watchdog period */
2514 adapter->detect_tx_hung = true;
2515
2516 /* Reset the timer */
2517 if (!test_bit(__E1000_DOWN, &adapter->flags))
2518 mod_timer(&adapter->watchdog_timer,
2519 round_jiffies(jiffies + 2 * HZ));
2520 }
2521
2522 enum latency_range {
2523 lowest_latency = 0,
2524 low_latency = 1,
2525 bulk_latency = 2,
2526 latency_invalid = 255
2527 };
2528
2529 /**
2530 * e1000_update_itr - update the dynamic ITR value based on statistics
2531 * @adapter: pointer to adapter
2532 * @itr_setting: current adapter->itr
2533 * @packets: the number of packets during this measurement interval
2534 * @bytes: the number of bytes during this measurement interval
2535 *
2536 * Stores a new ITR value based on packets and byte
2537 * counts during the last interrupt. The advantage of per interrupt
2538 * computation is faster updates and more accurate ITR for the current
2539 * traffic pattern. Constants in this function were computed
2540 * based on theoretical maximum wire speed and thresholds were set based
2541 * on testing data as well as attempting to minimize response time
2542 * while increasing bulk throughput.
2543 * this functionality is controlled by the InterruptThrottleRate module
2544 * parameter (see e1000_param.c)
2545 **/
2546 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2547 u16 itr_setting, int packets, int bytes)
2548 {
2549 unsigned int retval = itr_setting;
2550 struct e1000_hw *hw = &adapter->hw;
2551
2552 if (unlikely(hw->mac_type < e1000_82540))
2553 goto update_itr_done;
2554
2555 if (packets == 0)
2556 goto update_itr_done;
2557
2558 switch (itr_setting) {
2559 case lowest_latency:
2560 /* jumbo frames get bulk treatment*/
2561 if (bytes/packets > 8000)
2562 retval = bulk_latency;
2563 else if ((packets < 5) && (bytes > 512))
2564 retval = low_latency;
2565 break;
2566 case low_latency: /* 50 usec aka 20000 ints/s */
2567 if (bytes > 10000) {
2568 /* jumbo frames need bulk latency setting */
2569 if (bytes/packets > 8000)
2570 retval = bulk_latency;
2571 else if ((packets < 10) || ((bytes/packets) > 1200))
2572 retval = bulk_latency;
2573 else if ((packets > 35))
2574 retval = lowest_latency;
2575 } else if (bytes/packets > 2000)
2576 retval = bulk_latency;
2577 else if (packets <= 2 && bytes < 512)
2578 retval = lowest_latency;
2579 break;
2580 case bulk_latency: /* 250 usec aka 4000 ints/s */
2581 if (bytes > 25000) {
2582 if (packets > 35)
2583 retval = low_latency;
2584 } else if (bytes < 6000) {
2585 retval = low_latency;
2586 }
2587 break;
2588 }
2589
2590 update_itr_done:
2591 return retval;
2592 }
2593
2594 static void e1000_set_itr(struct e1000_adapter *adapter)
2595 {
2596 struct e1000_hw *hw = &adapter->hw;
2597 u16 current_itr;
2598 u32 new_itr = adapter->itr;
2599
2600 if (unlikely(hw->mac_type < e1000_82540))
2601 return;
2602
2603 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2604 if (unlikely(adapter->link_speed != SPEED_1000)) {
2605 current_itr = 0;
2606 new_itr = 4000;
2607 goto set_itr_now;
2608 }
2609
2610 adapter->tx_itr = e1000_update_itr(adapter,
2611 adapter->tx_itr,
2612 adapter->total_tx_packets,
2613 adapter->total_tx_bytes);
2614 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2615 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2616 adapter->tx_itr = low_latency;
2617
2618 adapter->rx_itr = e1000_update_itr(adapter,
2619 adapter->rx_itr,
2620 adapter->total_rx_packets,
2621 adapter->total_rx_bytes);
2622 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2623 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2624 adapter->rx_itr = low_latency;
2625
2626 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2627
2628 switch (current_itr) {
2629 /* counts and packets in update_itr are dependent on these numbers */
2630 case lowest_latency:
2631 new_itr = 70000;
2632 break;
2633 case low_latency:
2634 new_itr = 20000; /* aka hwitr = ~200 */
2635 break;
2636 case bulk_latency:
2637 new_itr = 4000;
2638 break;
2639 default:
2640 break;
2641 }
2642
2643 set_itr_now:
2644 if (new_itr != adapter->itr) {
2645 /* this attempts to bias the interrupt rate towards Bulk
2646 * by adding intermediate steps when interrupt rate is
2647 * increasing */
2648 new_itr = new_itr > adapter->itr ?
2649 min(adapter->itr + (new_itr >> 2), new_itr) :
2650 new_itr;
2651 adapter->itr = new_itr;
2652 ew32(ITR, 1000000000 / (new_itr * 256));
2653 }
2654 }
2655
2656 #define E1000_TX_FLAGS_CSUM 0x00000001
2657 #define E1000_TX_FLAGS_VLAN 0x00000002
2658 #define E1000_TX_FLAGS_TSO 0x00000004
2659 #define E1000_TX_FLAGS_IPV4 0x00000008
2660 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2661 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2662
2663 static int e1000_tso(struct e1000_adapter *adapter,
2664 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2665 {
2666 struct e1000_context_desc *context_desc;
2667 struct e1000_buffer *buffer_info;
2668 unsigned int i;
2669 u32 cmd_length = 0;
2670 u16 ipcse = 0, tucse, mss;
2671 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2672 int err;
2673
2674 if (skb_is_gso(skb)) {
2675 if (skb_header_cloned(skb)) {
2676 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2677 if (err)
2678 return err;
2679 }
2680
2681 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2682 mss = skb_shinfo(skb)->gso_size;
2683 if (skb->protocol == htons(ETH_P_IP)) {
2684 struct iphdr *iph = ip_hdr(skb);
2685 iph->tot_len = 0;
2686 iph->check = 0;
2687 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2688 iph->daddr, 0,
2689 IPPROTO_TCP,
2690 0);
2691 cmd_length = E1000_TXD_CMD_IP;
2692 ipcse = skb_transport_offset(skb) - 1;
2693 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2694 ipv6_hdr(skb)->payload_len = 0;
2695 tcp_hdr(skb)->check =
2696 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2697 &ipv6_hdr(skb)->daddr,
2698 0, IPPROTO_TCP, 0);
2699 ipcse = 0;
2700 }
2701 ipcss = skb_network_offset(skb);
2702 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2703 tucss = skb_transport_offset(skb);
2704 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2705 tucse = 0;
2706
2707 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2708 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2709
2710 i = tx_ring->next_to_use;
2711 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2712 buffer_info = &tx_ring->buffer_info[i];
2713
2714 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2715 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2716 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2717 context_desc->upper_setup.tcp_fields.tucss = tucss;
2718 context_desc->upper_setup.tcp_fields.tucso = tucso;
2719 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2720 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2721 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2722 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2723
2724 buffer_info->time_stamp = jiffies;
2725 buffer_info->next_to_watch = i;
2726
2727 if (++i == tx_ring->count) i = 0;
2728 tx_ring->next_to_use = i;
2729
2730 return true;
2731 }
2732 return false;
2733 }
2734
2735 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2736 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2737 {
2738 struct e1000_context_desc *context_desc;
2739 struct e1000_buffer *buffer_info;
2740 unsigned int i;
2741 u8 css;
2742 u32 cmd_len = E1000_TXD_CMD_DEXT;
2743
2744 if (skb->ip_summed != CHECKSUM_PARTIAL)
2745 return false;
2746
2747 switch (skb->protocol) {
2748 case cpu_to_be16(ETH_P_IP):
2749 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2750 cmd_len |= E1000_TXD_CMD_TCP;
2751 break;
2752 case cpu_to_be16(ETH_P_IPV6):
2753 /* XXX not handling all IPV6 headers */
2754 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2755 cmd_len |= E1000_TXD_CMD_TCP;
2756 break;
2757 default:
2758 if (unlikely(net_ratelimit()))
2759 e_warn(drv, "checksum_partial proto=%x!\n",
2760 skb->protocol);
2761 break;
2762 }
2763
2764 css = skb_checksum_start_offset(skb);
2765
2766 i = tx_ring->next_to_use;
2767 buffer_info = &tx_ring->buffer_info[i];
2768 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2769
2770 context_desc->lower_setup.ip_config = 0;
2771 context_desc->upper_setup.tcp_fields.tucss = css;
2772 context_desc->upper_setup.tcp_fields.tucso =
2773 css + skb->csum_offset;
2774 context_desc->upper_setup.tcp_fields.tucse = 0;
2775 context_desc->tcp_seg_setup.data = 0;
2776 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2777
2778 buffer_info->time_stamp = jiffies;
2779 buffer_info->next_to_watch = i;
2780
2781 if (unlikely(++i == tx_ring->count)) i = 0;
2782 tx_ring->next_to_use = i;
2783
2784 return true;
2785 }
2786
2787 #define E1000_MAX_TXD_PWR 12
2788 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2789
2790 static int e1000_tx_map(struct e1000_adapter *adapter,
2791 struct e1000_tx_ring *tx_ring,
2792 struct sk_buff *skb, unsigned int first,
2793 unsigned int max_per_txd, unsigned int nr_frags,
2794 unsigned int mss)
2795 {
2796 struct e1000_hw *hw = &adapter->hw;
2797 struct pci_dev *pdev = adapter->pdev;
2798 struct e1000_buffer *buffer_info;
2799 unsigned int len = skb_headlen(skb);
2800 unsigned int offset = 0, size, count = 0, i;
2801 unsigned int f, bytecount, segs;
2802
2803 i = tx_ring->next_to_use;
2804
2805 while (len) {
2806 buffer_info = &tx_ring->buffer_info[i];
2807 size = min(len, max_per_txd);
2808 /* Workaround for Controller erratum --
2809 * descriptor for non-tso packet in a linear SKB that follows a
2810 * tso gets written back prematurely before the data is fully
2811 * DMA'd to the controller */
2812 if (!skb->data_len && tx_ring->last_tx_tso &&
2813 !skb_is_gso(skb)) {
2814 tx_ring->last_tx_tso = 0;
2815 size -= 4;
2816 }
2817
2818 /* Workaround for premature desc write-backs
2819 * in TSO mode. Append 4-byte sentinel desc */
2820 if (unlikely(mss && !nr_frags && size == len && size > 8))
2821 size -= 4;
2822 /* work-around for errata 10 and it applies
2823 * to all controllers in PCI-X mode
2824 * The fix is to make sure that the first descriptor of a
2825 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2826 */
2827 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2828 (size > 2015) && count == 0))
2829 size = 2015;
2830
2831 /* Workaround for potential 82544 hang in PCI-X. Avoid
2832 * terminating buffers within evenly-aligned dwords. */
2833 if (unlikely(adapter->pcix_82544 &&
2834 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2835 size > 4))
2836 size -= 4;
2837
2838 buffer_info->length = size;
2839 /* set time_stamp *before* dma to help avoid a possible race */
2840 buffer_info->time_stamp = jiffies;
2841 buffer_info->mapped_as_page = false;
2842 buffer_info->dma = dma_map_single(&pdev->dev,
2843 skb->data + offset,
2844 size, DMA_TO_DEVICE);
2845 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2846 goto dma_error;
2847 buffer_info->next_to_watch = i;
2848
2849 len -= size;
2850 offset += size;
2851 count++;
2852 if (len) {
2853 i++;
2854 if (unlikely(i == tx_ring->count))
2855 i = 0;
2856 }
2857 }
2858
2859 for (f = 0; f < nr_frags; f++) {
2860 struct skb_frag_struct *frag;
2861
2862 frag = &skb_shinfo(skb)->frags[f];
2863 len = frag->size;
2864 offset = frag->page_offset;
2865
2866 while (len) {
2867 i++;
2868 if (unlikely(i == tx_ring->count))
2869 i = 0;
2870
2871 buffer_info = &tx_ring->buffer_info[i];
2872 size = min(len, max_per_txd);
2873 /* Workaround for premature desc write-backs
2874 * in TSO mode. Append 4-byte sentinel desc */
2875 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2876 size -= 4;
2877 /* Workaround for potential 82544 hang in PCI-X.
2878 * Avoid terminating buffers within evenly-aligned
2879 * dwords. */
2880 if (unlikely(adapter->pcix_82544 &&
2881 !((unsigned long)(page_to_phys(frag->page) + offset
2882 + size - 1) & 4) &&
2883 size > 4))
2884 size -= 4;
2885
2886 buffer_info->length = size;
2887 buffer_info->time_stamp = jiffies;
2888 buffer_info->mapped_as_page = true;
2889 buffer_info->dma = dma_map_page(&pdev->dev, frag->page,
2890 offset, size,
2891 DMA_TO_DEVICE);
2892 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2893 goto dma_error;
2894 buffer_info->next_to_watch = i;
2895
2896 len -= size;
2897 offset += size;
2898 count++;
2899 }
2900 }
2901
2902 segs = skb_shinfo(skb)->gso_segs ?: 1;
2903 /* multiply data chunks by size of headers */
2904 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2905
2906 tx_ring->buffer_info[i].skb = skb;
2907 tx_ring->buffer_info[i].segs = segs;
2908 tx_ring->buffer_info[i].bytecount = bytecount;
2909 tx_ring->buffer_info[first].next_to_watch = i;
2910
2911 return count;
2912
2913 dma_error:
2914 dev_err(&pdev->dev, "TX DMA map failed\n");
2915 buffer_info->dma = 0;
2916 if (count)
2917 count--;
2918
2919 while (count--) {
2920 if (i==0)
2921 i += tx_ring->count;
2922 i--;
2923 buffer_info = &tx_ring->buffer_info[i];
2924 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2925 }
2926
2927 return 0;
2928 }
2929
2930 static void e1000_tx_queue(struct e1000_adapter *adapter,
2931 struct e1000_tx_ring *tx_ring, int tx_flags,
2932 int count)
2933 {
2934 struct e1000_hw *hw = &adapter->hw;
2935 struct e1000_tx_desc *tx_desc = NULL;
2936 struct e1000_buffer *buffer_info;
2937 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2938 unsigned int i;
2939
2940 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2941 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2942 E1000_TXD_CMD_TSE;
2943 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2944
2945 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2946 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2947 }
2948
2949 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2950 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2951 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2952 }
2953
2954 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2955 txd_lower |= E1000_TXD_CMD_VLE;
2956 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2957 }
2958
2959 i = tx_ring->next_to_use;
2960
2961 while (count--) {
2962 buffer_info = &tx_ring->buffer_info[i];
2963 tx_desc = E1000_TX_DESC(*tx_ring, i);
2964 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2965 tx_desc->lower.data =
2966 cpu_to_le32(txd_lower | buffer_info->length);
2967 tx_desc->upper.data = cpu_to_le32(txd_upper);
2968 if (unlikely(++i == tx_ring->count)) i = 0;
2969 }
2970
2971 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2972
2973 /* Force memory writes to complete before letting h/w
2974 * know there are new descriptors to fetch. (Only
2975 * applicable for weak-ordered memory model archs,
2976 * such as IA-64). */
2977 wmb();
2978
2979 tx_ring->next_to_use = i;
2980 writel(i, hw->hw_addr + tx_ring->tdt);
2981 /* we need this if more than one processor can write to our tail
2982 * at a time, it syncronizes IO on IA64/Altix systems */
2983 mmiowb();
2984 }
2985
2986 /**
2987 * 82547 workaround to avoid controller hang in half-duplex environment.
2988 * The workaround is to avoid queuing a large packet that would span
2989 * the internal Tx FIFO ring boundary by notifying the stack to resend
2990 * the packet at a later time. This gives the Tx FIFO an opportunity to
2991 * flush all packets. When that occurs, we reset the Tx FIFO pointers
2992 * to the beginning of the Tx FIFO.
2993 **/
2994
2995 #define E1000_FIFO_HDR 0x10
2996 #define E1000_82547_PAD_LEN 0x3E0
2997
2998 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
2999 struct sk_buff *skb)
3000 {
3001 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3002 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3003
3004 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3005
3006 if (adapter->link_duplex != HALF_DUPLEX)
3007 goto no_fifo_stall_required;
3008
3009 if (atomic_read(&adapter->tx_fifo_stall))
3010 return 1;
3011
3012 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3013 atomic_set(&adapter->tx_fifo_stall, 1);
3014 return 1;
3015 }
3016
3017 no_fifo_stall_required:
3018 adapter->tx_fifo_head += skb_fifo_len;
3019 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3020 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3021 return 0;
3022 }
3023
3024 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3025 {
3026 struct e1000_adapter *adapter = netdev_priv(netdev);
3027 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3028
3029 netif_stop_queue(netdev);
3030 /* Herbert's original patch had:
3031 * smp_mb__after_netif_stop_queue();
3032 * but since that doesn't exist yet, just open code it. */
3033 smp_mb();
3034
3035 /* We need to check again in a case another CPU has just
3036 * made room available. */
3037 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3038 return -EBUSY;
3039
3040 /* A reprieve! */
3041 netif_start_queue(netdev);
3042 ++adapter->restart_queue;
3043 return 0;
3044 }
3045
3046 static int e1000_maybe_stop_tx(struct net_device *netdev,
3047 struct e1000_tx_ring *tx_ring, int size)
3048 {
3049 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3050 return 0;
3051 return __e1000_maybe_stop_tx(netdev, size);
3052 }
3053
3054 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3055 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3056 struct net_device *netdev)
3057 {
3058 struct e1000_adapter *adapter = netdev_priv(netdev);
3059 struct e1000_hw *hw = &adapter->hw;
3060 struct e1000_tx_ring *tx_ring;
3061 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3062 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3063 unsigned int tx_flags = 0;
3064 unsigned int len = skb_headlen(skb);
3065 unsigned int nr_frags;
3066 unsigned int mss;
3067 int count = 0;
3068 int tso;
3069 unsigned int f;
3070
3071 /* This goes back to the question of how to logically map a tx queue
3072 * to a flow. Right now, performance is impacted slightly negatively
3073 * if using multiple tx queues. If the stack breaks away from a
3074 * single qdisc implementation, we can look at this again. */
3075 tx_ring = adapter->tx_ring;
3076
3077 if (unlikely(skb->len <= 0)) {
3078 dev_kfree_skb_any(skb);
3079 return NETDEV_TX_OK;
3080 }
3081
3082 mss = skb_shinfo(skb)->gso_size;
3083 /* The controller does a simple calculation to
3084 * make sure there is enough room in the FIFO before
3085 * initiating the DMA for each buffer. The calc is:
3086 * 4 = ceil(buffer len/mss). To make sure we don't
3087 * overrun the FIFO, adjust the max buffer len if mss
3088 * drops. */
3089 if (mss) {
3090 u8 hdr_len;
3091 max_per_txd = min(mss << 2, max_per_txd);
3092 max_txd_pwr = fls(max_per_txd) - 1;
3093
3094 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3095 if (skb->data_len && hdr_len == len) {
3096 switch (hw->mac_type) {
3097 unsigned int pull_size;
3098 case e1000_82544:
3099 /* Make sure we have room to chop off 4 bytes,
3100 * and that the end alignment will work out to
3101 * this hardware's requirements
3102 * NOTE: this is a TSO only workaround
3103 * if end byte alignment not correct move us
3104 * into the next dword */
3105 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3106 break;
3107 /* fall through */
3108 pull_size = min((unsigned int)4, skb->data_len);
3109 if (!__pskb_pull_tail(skb, pull_size)) {
3110 e_err(drv, "__pskb_pull_tail "
3111 "failed.\n");
3112 dev_kfree_skb_any(skb);
3113 return NETDEV_TX_OK;
3114 }
3115 len = skb_headlen(skb);
3116 break;
3117 default:
3118 /* do nothing */
3119 break;
3120 }
3121 }
3122 }
3123
3124 /* reserve a descriptor for the offload context */
3125 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3126 count++;
3127 count++;
3128
3129 /* Controller Erratum workaround */
3130 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3131 count++;
3132
3133 count += TXD_USE_COUNT(len, max_txd_pwr);
3134
3135 if (adapter->pcix_82544)
3136 count++;
3137
3138 /* work-around for errata 10 and it applies to all controllers
3139 * in PCI-X mode, so add one more descriptor to the count
3140 */
3141 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3142 (len > 2015)))
3143 count++;
3144
3145 nr_frags = skb_shinfo(skb)->nr_frags;
3146 for (f = 0; f < nr_frags; f++)
3147 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3148 max_txd_pwr);
3149 if (adapter->pcix_82544)
3150 count += nr_frags;
3151
3152 /* need: count + 2 desc gap to keep tail from touching
3153 * head, otherwise try next time */
3154 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3155 return NETDEV_TX_BUSY;
3156
3157 if (unlikely(hw->mac_type == e1000_82547)) {
3158 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3159 netif_stop_queue(netdev);
3160 if (!test_bit(__E1000_DOWN, &adapter->flags))
3161 mod_timer(&adapter->tx_fifo_stall_timer,
3162 jiffies + 1);
3163 return NETDEV_TX_BUSY;
3164 }
3165 }
3166
3167 if (unlikely(vlan_tx_tag_present(skb))) {
3168 tx_flags |= E1000_TX_FLAGS_VLAN;
3169 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3170 }
3171
3172 first = tx_ring->next_to_use;
3173
3174 tso = e1000_tso(adapter, tx_ring, skb);
3175 if (tso < 0) {
3176 dev_kfree_skb_any(skb);
3177 return NETDEV_TX_OK;
3178 }
3179
3180 if (likely(tso)) {
3181 if (likely(hw->mac_type != e1000_82544))
3182 tx_ring->last_tx_tso = 1;
3183 tx_flags |= E1000_TX_FLAGS_TSO;
3184 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3185 tx_flags |= E1000_TX_FLAGS_CSUM;
3186
3187 if (likely(skb->protocol == htons(ETH_P_IP)))
3188 tx_flags |= E1000_TX_FLAGS_IPV4;
3189
3190 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3191 nr_frags, mss);
3192
3193 if (count) {
3194 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3195 /* Make sure there is space in the ring for the next send. */
3196 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3197
3198 } else {
3199 dev_kfree_skb_any(skb);
3200 tx_ring->buffer_info[first].time_stamp = 0;
3201 tx_ring->next_to_use = first;
3202 }
3203
3204 return NETDEV_TX_OK;
3205 }
3206
3207 /**
3208 * e1000_tx_timeout - Respond to a Tx Hang
3209 * @netdev: network interface device structure
3210 **/
3211
3212 static void e1000_tx_timeout(struct net_device *netdev)
3213 {
3214 struct e1000_adapter *adapter = netdev_priv(netdev);
3215
3216 /* Do the reset outside of interrupt context */
3217 adapter->tx_timeout_count++;
3218 schedule_work(&adapter->reset_task);
3219 }
3220
3221 static void e1000_reset_task(struct work_struct *work)
3222 {
3223 struct e1000_adapter *adapter =
3224 container_of(work, struct e1000_adapter, reset_task);
3225
3226 e1000_reinit_safe(adapter);
3227 }
3228
3229 /**
3230 * e1000_get_stats - Get System Network Statistics
3231 * @netdev: network interface device structure
3232 *
3233 * Returns the address of the device statistics structure.
3234 * The statistics are actually updated from the timer callback.
3235 **/
3236
3237 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3238 {
3239 /* only return the current stats */
3240 return &netdev->stats;
3241 }
3242
3243 /**
3244 * e1000_change_mtu - Change the Maximum Transfer Unit
3245 * @netdev: network interface device structure
3246 * @new_mtu: new value for maximum frame size
3247 *
3248 * Returns 0 on success, negative on failure
3249 **/
3250
3251 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3252 {
3253 struct e1000_adapter *adapter = netdev_priv(netdev);
3254 struct e1000_hw *hw = &adapter->hw;
3255 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3256
3257 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3258 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3259 e_err(probe, "Invalid MTU setting\n");
3260 return -EINVAL;
3261 }
3262
3263 /* Adapter-specific max frame size limits. */
3264 switch (hw->mac_type) {
3265 case e1000_undefined ... e1000_82542_rev2_1:
3266 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3267 e_err(probe, "Jumbo Frames not supported.\n");
3268 return -EINVAL;
3269 }
3270 break;
3271 default:
3272 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3273 break;
3274 }
3275
3276 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3277 msleep(1);
3278 /* e1000_down has a dependency on max_frame_size */
3279 hw->max_frame_size = max_frame;
3280 if (netif_running(netdev))
3281 e1000_down(adapter);
3282
3283 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3284 * means we reserve 2 more, this pushes us to allocate from the next
3285 * larger slab size.
3286 * i.e. RXBUFFER_2048 --> size-4096 slab
3287 * however with the new *_jumbo_rx* routines, jumbo receives will use
3288 * fragmented skbs */
3289
3290 if (max_frame <= E1000_RXBUFFER_2048)
3291 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3292 else
3293 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3294 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3295 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3296 adapter->rx_buffer_len = PAGE_SIZE;
3297 #endif
3298
3299 /* adjust allocation if LPE protects us, and we aren't using SBP */
3300 if (!hw->tbi_compatibility_on &&
3301 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3302 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3303 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3304
3305 pr_info("%s changing MTU from %d to %d\n",
3306 netdev->name, netdev->mtu, new_mtu);
3307 netdev->mtu = new_mtu;
3308
3309 if (netif_running(netdev))
3310 e1000_up(adapter);
3311 else
3312 e1000_reset(adapter);
3313
3314 clear_bit(__E1000_RESETTING, &adapter->flags);
3315
3316 return 0;
3317 }
3318
3319 /**
3320 * e1000_update_stats - Update the board statistics counters
3321 * @adapter: board private structure
3322 **/
3323
3324 void e1000_update_stats(struct e1000_adapter *adapter)
3325 {
3326 struct net_device *netdev = adapter->netdev;
3327 struct e1000_hw *hw = &adapter->hw;
3328 struct pci_dev *pdev = adapter->pdev;
3329 unsigned long flags;
3330 u16 phy_tmp;
3331
3332 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3333
3334 /*
3335 * Prevent stats update while adapter is being reset, or if the pci
3336 * connection is down.
3337 */
3338 if (adapter->link_speed == 0)
3339 return;
3340 if (pci_channel_offline(pdev))
3341 return;
3342
3343 spin_lock_irqsave(&adapter->stats_lock, flags);
3344
3345 /* these counters are modified from e1000_tbi_adjust_stats,
3346 * called from the interrupt context, so they must only
3347 * be written while holding adapter->stats_lock
3348 */
3349
3350 adapter->stats.crcerrs += er32(CRCERRS);
3351 adapter->stats.gprc += er32(GPRC);
3352 adapter->stats.gorcl += er32(GORCL);
3353 adapter->stats.gorch += er32(GORCH);
3354 adapter->stats.bprc += er32(BPRC);
3355 adapter->stats.mprc += er32(MPRC);
3356 adapter->stats.roc += er32(ROC);
3357
3358 adapter->stats.prc64 += er32(PRC64);
3359 adapter->stats.prc127 += er32(PRC127);
3360 adapter->stats.prc255 += er32(PRC255);
3361 adapter->stats.prc511 += er32(PRC511);
3362 adapter->stats.prc1023 += er32(PRC1023);
3363 adapter->stats.prc1522 += er32(PRC1522);
3364
3365 adapter->stats.symerrs += er32(SYMERRS);
3366 adapter->stats.mpc += er32(MPC);
3367 adapter->stats.scc += er32(SCC);
3368 adapter->stats.ecol += er32(ECOL);
3369 adapter->stats.mcc += er32(MCC);
3370 adapter->stats.latecol += er32(LATECOL);
3371 adapter->stats.dc += er32(DC);
3372 adapter->stats.sec += er32(SEC);
3373 adapter->stats.rlec += er32(RLEC);
3374 adapter->stats.xonrxc += er32(XONRXC);
3375 adapter->stats.xontxc += er32(XONTXC);
3376 adapter->stats.xoffrxc += er32(XOFFRXC);
3377 adapter->stats.xofftxc += er32(XOFFTXC);
3378 adapter->stats.fcruc += er32(FCRUC);
3379 adapter->stats.gptc += er32(GPTC);
3380 adapter->stats.gotcl += er32(GOTCL);
3381 adapter->stats.gotch += er32(GOTCH);
3382 adapter->stats.rnbc += er32(RNBC);
3383 adapter->stats.ruc += er32(RUC);
3384 adapter->stats.rfc += er32(RFC);
3385 adapter->stats.rjc += er32(RJC);
3386 adapter->stats.torl += er32(TORL);
3387 adapter->stats.torh += er32(TORH);
3388 adapter->stats.totl += er32(TOTL);
3389 adapter->stats.toth += er32(TOTH);
3390 adapter->stats.tpr += er32(TPR);
3391
3392 adapter->stats.ptc64 += er32(PTC64);
3393 adapter->stats.ptc127 += er32(PTC127);
3394 adapter->stats.ptc255 += er32(PTC255);
3395 adapter->stats.ptc511 += er32(PTC511);
3396 adapter->stats.ptc1023 += er32(PTC1023);
3397 adapter->stats.ptc1522 += er32(PTC1522);
3398
3399 adapter->stats.mptc += er32(MPTC);
3400 adapter->stats.bptc += er32(BPTC);
3401
3402 /* used for adaptive IFS */
3403
3404 hw->tx_packet_delta = er32(TPT);
3405 adapter->stats.tpt += hw->tx_packet_delta;
3406 hw->collision_delta = er32(COLC);
3407 adapter->stats.colc += hw->collision_delta;
3408
3409 if (hw->mac_type >= e1000_82543) {
3410 adapter->stats.algnerrc += er32(ALGNERRC);
3411 adapter->stats.rxerrc += er32(RXERRC);
3412 adapter->stats.tncrs += er32(TNCRS);
3413 adapter->stats.cexterr += er32(CEXTERR);
3414 adapter->stats.tsctc += er32(TSCTC);
3415 adapter->stats.tsctfc += er32(TSCTFC);
3416 }
3417
3418 /* Fill out the OS statistics structure */
3419 netdev->stats.multicast = adapter->stats.mprc;
3420 netdev->stats.collisions = adapter->stats.colc;
3421
3422 /* Rx Errors */
3423
3424 /* RLEC on some newer hardware can be incorrect so build
3425 * our own version based on RUC and ROC */
3426 netdev->stats.rx_errors = adapter->stats.rxerrc +
3427 adapter->stats.crcerrs + adapter->stats.algnerrc +
3428 adapter->stats.ruc + adapter->stats.roc +
3429 adapter->stats.cexterr;
3430 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3431 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3432 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3433 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3434 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3435
3436 /* Tx Errors */
3437 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3438 netdev->stats.tx_errors = adapter->stats.txerrc;
3439 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3440 netdev->stats.tx_window_errors = adapter->stats.latecol;
3441 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3442 if (hw->bad_tx_carr_stats_fd &&
3443 adapter->link_duplex == FULL_DUPLEX) {
3444 netdev->stats.tx_carrier_errors = 0;
3445 adapter->stats.tncrs = 0;
3446 }
3447
3448 /* Tx Dropped needs to be maintained elsewhere */
3449
3450 /* Phy Stats */
3451 if (hw->media_type == e1000_media_type_copper) {
3452 if ((adapter->link_speed == SPEED_1000) &&
3453 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3454 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3455 adapter->phy_stats.idle_errors += phy_tmp;
3456 }
3457
3458 if ((hw->mac_type <= e1000_82546) &&
3459 (hw->phy_type == e1000_phy_m88) &&
3460 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3461 adapter->phy_stats.receive_errors += phy_tmp;
3462 }
3463
3464 /* Management Stats */
3465 if (hw->has_smbus) {
3466 adapter->stats.mgptc += er32(MGTPTC);
3467 adapter->stats.mgprc += er32(MGTPRC);
3468 adapter->stats.mgpdc += er32(MGTPDC);
3469 }
3470
3471 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3472 }
3473
3474 /**
3475 * e1000_intr - Interrupt Handler
3476 * @irq: interrupt number
3477 * @data: pointer to a network interface device structure
3478 **/
3479
3480 static irqreturn_t e1000_intr(int irq, void *data)
3481 {
3482 struct net_device *netdev = data;
3483 struct e1000_adapter *adapter = netdev_priv(netdev);
3484 struct e1000_hw *hw = &adapter->hw;
3485 u32 icr = er32(ICR);
3486
3487 if (unlikely((!icr)))
3488 return IRQ_NONE; /* Not our interrupt */
3489
3490 /*
3491 * we might have caused the interrupt, but the above
3492 * read cleared it, and just in case the driver is
3493 * down there is nothing to do so return handled
3494 */
3495 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3496 return IRQ_HANDLED;
3497
3498 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3499 hw->get_link_status = 1;
3500 /* guard against interrupt when we're going down */
3501 if (!test_bit(__E1000_DOWN, &adapter->flags))
3502 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3503 }
3504
3505 /* disable interrupts, without the synchronize_irq bit */
3506 ew32(IMC, ~0);
3507 E1000_WRITE_FLUSH();
3508
3509 if (likely(napi_schedule_prep(&adapter->napi))) {
3510 adapter->total_tx_bytes = 0;
3511 adapter->total_tx_packets = 0;
3512 adapter->total_rx_bytes = 0;
3513 adapter->total_rx_packets = 0;
3514 __napi_schedule(&adapter->napi);
3515 } else {
3516 /* this really should not happen! if it does it is basically a
3517 * bug, but not a hard error, so enable ints and continue */
3518 if (!test_bit(__E1000_DOWN, &adapter->flags))
3519 e1000_irq_enable(adapter);
3520 }
3521
3522 return IRQ_HANDLED;
3523 }
3524
3525 /**
3526 * e1000_clean - NAPI Rx polling callback
3527 * @adapter: board private structure
3528 **/
3529 static int e1000_clean(struct napi_struct *napi, int budget)
3530 {
3531 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3532 int tx_clean_complete = 0, work_done = 0;
3533
3534 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3535
3536 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3537
3538 if (!tx_clean_complete)
3539 work_done = budget;
3540
3541 /* If budget not fully consumed, exit the polling mode */
3542 if (work_done < budget) {
3543 if (likely(adapter->itr_setting & 3))
3544 e1000_set_itr(adapter);
3545 napi_complete(napi);
3546 if (!test_bit(__E1000_DOWN, &adapter->flags))
3547 e1000_irq_enable(adapter);
3548 }
3549
3550 return work_done;
3551 }
3552
3553 /**
3554 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3555 * @adapter: board private structure
3556 **/
3557 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3558 struct e1000_tx_ring *tx_ring)
3559 {
3560 struct e1000_hw *hw = &adapter->hw;
3561 struct net_device *netdev = adapter->netdev;
3562 struct e1000_tx_desc *tx_desc, *eop_desc;
3563 struct e1000_buffer *buffer_info;
3564 unsigned int i, eop;
3565 unsigned int count = 0;
3566 unsigned int total_tx_bytes=0, total_tx_packets=0;
3567
3568 i = tx_ring->next_to_clean;
3569 eop = tx_ring->buffer_info[i].next_to_watch;
3570 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3571
3572 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3573 (count < tx_ring->count)) {
3574 bool cleaned = false;
3575 rmb(); /* read buffer_info after eop_desc */
3576 for ( ; !cleaned; count++) {
3577 tx_desc = E1000_TX_DESC(*tx_ring, i);
3578 buffer_info = &tx_ring->buffer_info[i];
3579 cleaned = (i == eop);
3580
3581 if (cleaned) {
3582 total_tx_packets += buffer_info->segs;
3583 total_tx_bytes += buffer_info->bytecount;
3584 }
3585 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3586 tx_desc->upper.data = 0;
3587
3588 if (unlikely(++i == tx_ring->count)) i = 0;
3589 }
3590
3591 eop = tx_ring->buffer_info[i].next_to_watch;
3592 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3593 }
3594
3595 tx_ring->next_to_clean = i;
3596
3597 #define TX_WAKE_THRESHOLD 32
3598 if (unlikely(count && netif_carrier_ok(netdev) &&
3599 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3600 /* Make sure that anybody stopping the queue after this
3601 * sees the new next_to_clean.
3602 */
3603 smp_mb();
3604
3605 if (netif_queue_stopped(netdev) &&
3606 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3607 netif_wake_queue(netdev);
3608 ++adapter->restart_queue;
3609 }
3610 }
3611
3612 if (adapter->detect_tx_hung) {
3613 /* Detect a transmit hang in hardware, this serializes the
3614 * check with the clearing of time_stamp and movement of i */
3615 adapter->detect_tx_hung = false;
3616 if (tx_ring->buffer_info[eop].time_stamp &&
3617 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3618 (adapter->tx_timeout_factor * HZ)) &&
3619 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3620
3621 /* detected Tx unit hang */
3622 e_err(drv, "Detected Tx Unit Hang\n"
3623 " Tx Queue <%lu>\n"
3624 " TDH <%x>\n"
3625 " TDT <%x>\n"
3626 " next_to_use <%x>\n"
3627 " next_to_clean <%x>\n"
3628 "buffer_info[next_to_clean]\n"
3629 " time_stamp <%lx>\n"
3630 " next_to_watch <%x>\n"
3631 " jiffies <%lx>\n"
3632 " next_to_watch.status <%x>\n",
3633 (unsigned long)((tx_ring - adapter->tx_ring) /
3634 sizeof(struct e1000_tx_ring)),
3635 readl(hw->hw_addr + tx_ring->tdh),
3636 readl(hw->hw_addr + tx_ring->tdt),
3637 tx_ring->next_to_use,
3638 tx_ring->next_to_clean,
3639 tx_ring->buffer_info[eop].time_stamp,
3640 eop,
3641 jiffies,
3642 eop_desc->upper.fields.status);
3643 netif_stop_queue(netdev);
3644 }
3645 }
3646 adapter->total_tx_bytes += total_tx_bytes;
3647 adapter->total_tx_packets += total_tx_packets;
3648 netdev->stats.tx_bytes += total_tx_bytes;
3649 netdev->stats.tx_packets += total_tx_packets;
3650 return count < tx_ring->count;
3651 }
3652
3653 /**
3654 * e1000_rx_checksum - Receive Checksum Offload for 82543
3655 * @adapter: board private structure
3656 * @status_err: receive descriptor status and error fields
3657 * @csum: receive descriptor csum field
3658 * @sk_buff: socket buffer with received data
3659 **/
3660
3661 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3662 u32 csum, struct sk_buff *skb)
3663 {
3664 struct e1000_hw *hw = &adapter->hw;
3665 u16 status = (u16)status_err;
3666 u8 errors = (u8)(status_err >> 24);
3667
3668 skb_checksum_none_assert(skb);
3669
3670 /* 82543 or newer only */
3671 if (unlikely(hw->mac_type < e1000_82543)) return;
3672 /* Ignore Checksum bit is set */
3673 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3674 /* TCP/UDP checksum error bit is set */
3675 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3676 /* let the stack verify checksum errors */
3677 adapter->hw_csum_err++;
3678 return;
3679 }
3680 /* TCP/UDP Checksum has not been calculated */
3681 if (!(status & E1000_RXD_STAT_TCPCS))
3682 return;
3683
3684 /* It must be a TCP or UDP packet with a valid checksum */
3685 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3686 /* TCP checksum is good */
3687 skb->ip_summed = CHECKSUM_UNNECESSARY;
3688 }
3689 adapter->hw_csum_good++;
3690 }
3691
3692 /**
3693 * e1000_consume_page - helper function
3694 **/
3695 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3696 u16 length)
3697 {
3698 bi->page = NULL;
3699 skb->len += length;
3700 skb->data_len += length;
3701 skb->truesize += length;
3702 }
3703
3704 /**
3705 * e1000_receive_skb - helper function to handle rx indications
3706 * @adapter: board private structure
3707 * @status: descriptor status field as written by hardware
3708 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3709 * @skb: pointer to sk_buff to be indicated to stack
3710 */
3711 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3712 __le16 vlan, struct sk_buff *skb)
3713 {
3714 skb->protocol = eth_type_trans(skb, adapter->netdev);
3715
3716 if ((unlikely(adapter->vlgrp && (status & E1000_RXD_STAT_VP))))
3717 vlan_gro_receive(&adapter->napi, adapter->vlgrp,
3718 le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK,
3719 skb);
3720 else
3721 napi_gro_receive(&adapter->napi, skb);
3722 }
3723
3724 /**
3725 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3726 * @adapter: board private structure
3727 * @rx_ring: ring to clean
3728 * @work_done: amount of napi work completed this call
3729 * @work_to_do: max amount of work allowed for this call to do
3730 *
3731 * the return value indicates whether actual cleaning was done, there
3732 * is no guarantee that everything was cleaned
3733 */
3734 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
3735 struct e1000_rx_ring *rx_ring,
3736 int *work_done, int work_to_do)
3737 {
3738 struct e1000_hw *hw = &adapter->hw;
3739 struct net_device *netdev = adapter->netdev;
3740 struct pci_dev *pdev = adapter->pdev;
3741 struct e1000_rx_desc *rx_desc, *next_rxd;
3742 struct e1000_buffer *buffer_info, *next_buffer;
3743 unsigned long irq_flags;
3744 u32 length;
3745 unsigned int i;
3746 int cleaned_count = 0;
3747 bool cleaned = false;
3748 unsigned int total_rx_bytes=0, total_rx_packets=0;
3749
3750 i = rx_ring->next_to_clean;
3751 rx_desc = E1000_RX_DESC(*rx_ring, i);
3752 buffer_info = &rx_ring->buffer_info[i];
3753
3754 while (rx_desc->status & E1000_RXD_STAT_DD) {
3755 struct sk_buff *skb;
3756 u8 status;
3757
3758 if (*work_done >= work_to_do)
3759 break;
3760 (*work_done)++;
3761 rmb(); /* read descriptor and rx_buffer_info after status DD */
3762
3763 status = rx_desc->status;
3764 skb = buffer_info->skb;
3765 buffer_info->skb = NULL;
3766
3767 if (++i == rx_ring->count) i = 0;
3768 next_rxd = E1000_RX_DESC(*rx_ring, i);
3769 prefetch(next_rxd);
3770
3771 next_buffer = &rx_ring->buffer_info[i];
3772
3773 cleaned = true;
3774 cleaned_count++;
3775 dma_unmap_page(&pdev->dev, buffer_info->dma,
3776 buffer_info->length, DMA_FROM_DEVICE);
3777 buffer_info->dma = 0;
3778
3779 length = le16_to_cpu(rx_desc->length);
3780
3781 /* errors is only valid for DD + EOP descriptors */
3782 if (unlikely((status & E1000_RXD_STAT_EOP) &&
3783 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
3784 u8 last_byte = *(skb->data + length - 1);
3785 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
3786 last_byte)) {
3787 spin_lock_irqsave(&adapter->stats_lock,
3788 irq_flags);
3789 e1000_tbi_adjust_stats(hw, &adapter->stats,
3790 length, skb->data);
3791 spin_unlock_irqrestore(&adapter->stats_lock,
3792 irq_flags);
3793 length--;
3794 } else {
3795 /* recycle both page and skb */
3796 buffer_info->skb = skb;
3797 /* an error means any chain goes out the window
3798 * too */
3799 if (rx_ring->rx_skb_top)
3800 dev_kfree_skb(rx_ring->rx_skb_top);
3801 rx_ring->rx_skb_top = NULL;
3802 goto next_desc;
3803 }
3804 }
3805
3806 #define rxtop rx_ring->rx_skb_top
3807 if (!(status & E1000_RXD_STAT_EOP)) {
3808 /* this descriptor is only the beginning (or middle) */
3809 if (!rxtop) {
3810 /* this is the beginning of a chain */
3811 rxtop = skb;
3812 skb_fill_page_desc(rxtop, 0, buffer_info->page,
3813 0, length);
3814 } else {
3815 /* this is the middle of a chain */
3816 skb_fill_page_desc(rxtop,
3817 skb_shinfo(rxtop)->nr_frags,
3818 buffer_info->page, 0, length);
3819 /* re-use the skb, only consumed the page */
3820 buffer_info->skb = skb;
3821 }
3822 e1000_consume_page(buffer_info, rxtop, length);
3823 goto next_desc;
3824 } else {
3825 if (rxtop) {
3826 /* end of the chain */
3827 skb_fill_page_desc(rxtop,
3828 skb_shinfo(rxtop)->nr_frags,
3829 buffer_info->page, 0, length);
3830 /* re-use the current skb, we only consumed the
3831 * page */
3832 buffer_info->skb = skb;
3833 skb = rxtop;
3834 rxtop = NULL;
3835 e1000_consume_page(buffer_info, skb, length);
3836 } else {
3837 /* no chain, got EOP, this buf is the packet
3838 * copybreak to save the put_page/alloc_page */
3839 if (length <= copybreak &&
3840 skb_tailroom(skb) >= length) {
3841 u8 *vaddr;
3842 vaddr = kmap_atomic(buffer_info->page,
3843 KM_SKB_DATA_SOFTIRQ);
3844 memcpy(skb_tail_pointer(skb), vaddr, length);
3845 kunmap_atomic(vaddr,
3846 KM_SKB_DATA_SOFTIRQ);
3847 /* re-use the page, so don't erase
3848 * buffer_info->page */
3849 skb_put(skb, length);
3850 } else {
3851 skb_fill_page_desc(skb, 0,
3852 buffer_info->page, 0,
3853 length);
3854 e1000_consume_page(buffer_info, skb,
3855 length);
3856 }
3857 }
3858 }
3859
3860 /* Receive Checksum Offload XXX recompute due to CRC strip? */
3861 e1000_rx_checksum(adapter,
3862 (u32)(status) |
3863 ((u32)(rx_desc->errors) << 24),
3864 le16_to_cpu(rx_desc->csum), skb);
3865
3866 pskb_trim(skb, skb->len - 4);
3867
3868 /* probably a little skewed due to removing CRC */
3869 total_rx_bytes += skb->len;
3870 total_rx_packets++;
3871
3872 /* eth type trans needs skb->data to point to something */
3873 if (!pskb_may_pull(skb, ETH_HLEN)) {
3874 e_err(drv, "pskb_may_pull failed.\n");
3875 dev_kfree_skb(skb);
3876 goto next_desc;
3877 }
3878
3879 e1000_receive_skb(adapter, status, rx_desc->special, skb);
3880
3881 next_desc:
3882 rx_desc->status = 0;
3883
3884 /* return some buffers to hardware, one at a time is too slow */
3885 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3886 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3887 cleaned_count = 0;
3888 }
3889
3890 /* use prefetched values */
3891 rx_desc = next_rxd;
3892 buffer_info = next_buffer;
3893 }
3894 rx_ring->next_to_clean = i;
3895
3896 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3897 if (cleaned_count)
3898 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3899
3900 adapter->total_rx_packets += total_rx_packets;
3901 adapter->total_rx_bytes += total_rx_bytes;
3902 netdev->stats.rx_bytes += total_rx_bytes;
3903 netdev->stats.rx_packets += total_rx_packets;
3904 return cleaned;
3905 }
3906
3907 /*
3908 * this should improve performance for small packets with large amounts
3909 * of reassembly being done in the stack
3910 */
3911 static void e1000_check_copybreak(struct net_device *netdev,
3912 struct e1000_buffer *buffer_info,
3913 u32 length, struct sk_buff **skb)
3914 {
3915 struct sk_buff *new_skb;
3916
3917 if (length > copybreak)
3918 return;
3919
3920 new_skb = netdev_alloc_skb_ip_align(netdev, length);
3921 if (!new_skb)
3922 return;
3923
3924 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
3925 (*skb)->data - NET_IP_ALIGN,
3926 length + NET_IP_ALIGN);
3927 /* save the skb in buffer_info as good */
3928 buffer_info->skb = *skb;
3929 *skb = new_skb;
3930 }
3931
3932 /**
3933 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3934 * @adapter: board private structure
3935 * @rx_ring: ring to clean
3936 * @work_done: amount of napi work completed this call
3937 * @work_to_do: max amount of work allowed for this call to do
3938 */
3939 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3940 struct e1000_rx_ring *rx_ring,
3941 int *work_done, int work_to_do)
3942 {
3943 struct e1000_hw *hw = &adapter->hw;
3944 struct net_device *netdev = adapter->netdev;
3945 struct pci_dev *pdev = adapter->pdev;
3946 struct e1000_rx_desc *rx_desc, *next_rxd;
3947 struct e1000_buffer *buffer_info, *next_buffer;
3948 unsigned long flags;
3949 u32 length;
3950 unsigned int i;
3951 int cleaned_count = 0;
3952 bool cleaned = false;
3953 unsigned int total_rx_bytes=0, total_rx_packets=0;
3954
3955 i = rx_ring->next_to_clean;
3956 rx_desc = E1000_RX_DESC(*rx_ring, i);
3957 buffer_info = &rx_ring->buffer_info[i];
3958
3959 while (rx_desc->status & E1000_RXD_STAT_DD) {
3960 struct sk_buff *skb;
3961 u8 status;
3962
3963 if (*work_done >= work_to_do)
3964 break;
3965 (*work_done)++;
3966 rmb(); /* read descriptor and rx_buffer_info after status DD */
3967
3968 status = rx_desc->status;
3969 skb = buffer_info->skb;
3970 buffer_info->skb = NULL;
3971
3972 prefetch(skb->data - NET_IP_ALIGN);
3973
3974 if (++i == rx_ring->count) i = 0;
3975 next_rxd = E1000_RX_DESC(*rx_ring, i);
3976 prefetch(next_rxd);
3977
3978 next_buffer = &rx_ring->buffer_info[i];
3979
3980 cleaned = true;
3981 cleaned_count++;
3982 dma_unmap_single(&pdev->dev, buffer_info->dma,
3983 buffer_info->length, DMA_FROM_DEVICE);
3984 buffer_info->dma = 0;
3985
3986 length = le16_to_cpu(rx_desc->length);
3987 /* !EOP means multiple descriptors were used to store a single
3988 * packet, if thats the case we need to toss it. In fact, we
3989 * to toss every packet with the EOP bit clear and the next
3990 * frame that _does_ have the EOP bit set, as it is by
3991 * definition only a frame fragment
3992 */
3993 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
3994 adapter->discarding = true;
3995
3996 if (adapter->discarding) {
3997 /* All receives must fit into a single buffer */
3998 e_dbg("Receive packet consumed multiple buffers\n");
3999 /* recycle */
4000 buffer_info->skb = skb;
4001 if (status & E1000_RXD_STAT_EOP)
4002 adapter->discarding = false;
4003 goto next_desc;
4004 }
4005
4006 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4007 u8 last_byte = *(skb->data + length - 1);
4008 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4009 last_byte)) {
4010 spin_lock_irqsave(&adapter->stats_lock, flags);
4011 e1000_tbi_adjust_stats(hw, &adapter->stats,
4012 length, skb->data);
4013 spin_unlock_irqrestore(&adapter->stats_lock,
4014 flags);
4015 length--;
4016 } else {
4017 /* recycle */
4018 buffer_info->skb = skb;
4019 goto next_desc;
4020 }
4021 }
4022
4023 /* adjust length to remove Ethernet CRC, this must be
4024 * done after the TBI_ACCEPT workaround above */
4025 length -= 4;
4026
4027 /* probably a little skewed due to removing CRC */
4028 total_rx_bytes += length;
4029 total_rx_packets++;
4030
4031 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4032
4033 skb_put(skb, length);
4034
4035 /* Receive Checksum Offload */
4036 e1000_rx_checksum(adapter,
4037 (u32)(status) |
4038 ((u32)(rx_desc->errors) << 24),
4039 le16_to_cpu(rx_desc->csum), skb);
4040
4041 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4042
4043 next_desc:
4044 rx_desc->status = 0;
4045
4046 /* return some buffers to hardware, one at a time is too slow */
4047 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4048 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4049 cleaned_count = 0;
4050 }
4051
4052 /* use prefetched values */
4053 rx_desc = next_rxd;
4054 buffer_info = next_buffer;
4055 }
4056 rx_ring->next_to_clean = i;
4057
4058 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4059 if (cleaned_count)
4060 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4061
4062 adapter->total_rx_packets += total_rx_packets;
4063 adapter->total_rx_bytes += total_rx_bytes;
4064 netdev->stats.rx_bytes += total_rx_bytes;
4065 netdev->stats.rx_packets += total_rx_packets;
4066 return cleaned;
4067 }
4068
4069 /**
4070 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4071 * @adapter: address of board private structure
4072 * @rx_ring: pointer to receive ring structure
4073 * @cleaned_count: number of buffers to allocate this pass
4074 **/
4075
4076 static void
4077 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4078 struct e1000_rx_ring *rx_ring, int cleaned_count)
4079 {
4080 struct net_device *netdev = adapter->netdev;
4081 struct pci_dev *pdev = adapter->pdev;
4082 struct e1000_rx_desc *rx_desc;
4083 struct e1000_buffer *buffer_info;
4084 struct sk_buff *skb;
4085 unsigned int i;
4086 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4087
4088 i = rx_ring->next_to_use;
4089 buffer_info = &rx_ring->buffer_info[i];
4090
4091 while (cleaned_count--) {
4092 skb = buffer_info->skb;
4093 if (skb) {
4094 skb_trim(skb, 0);
4095 goto check_page;
4096 }
4097
4098 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4099 if (unlikely(!skb)) {
4100 /* Better luck next round */
4101 adapter->alloc_rx_buff_failed++;
4102 break;
4103 }
4104
4105 /* Fix for errata 23, can't cross 64kB boundary */
4106 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4107 struct sk_buff *oldskb = skb;
4108 e_err(rx_err, "skb align check failed: %u bytes at "
4109 "%p\n", bufsz, skb->data);
4110 /* Try again, without freeing the previous */
4111 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4112 /* Failed allocation, critical failure */
4113 if (!skb) {
4114 dev_kfree_skb(oldskb);
4115 adapter->alloc_rx_buff_failed++;
4116 break;
4117 }
4118
4119 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4120 /* give up */
4121 dev_kfree_skb(skb);
4122 dev_kfree_skb(oldskb);
4123 break; /* while (cleaned_count--) */
4124 }
4125
4126 /* Use new allocation */
4127 dev_kfree_skb(oldskb);
4128 }
4129 buffer_info->skb = skb;
4130 buffer_info->length = adapter->rx_buffer_len;
4131 check_page:
4132 /* allocate a new page if necessary */
4133 if (!buffer_info->page) {
4134 buffer_info->page = alloc_page(GFP_ATOMIC);
4135 if (unlikely(!buffer_info->page)) {
4136 adapter->alloc_rx_buff_failed++;
4137 break;
4138 }
4139 }
4140
4141 if (!buffer_info->dma) {
4142 buffer_info->dma = dma_map_page(&pdev->dev,
4143 buffer_info->page, 0,
4144 buffer_info->length,
4145 DMA_FROM_DEVICE);
4146 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4147 put_page(buffer_info->page);
4148 dev_kfree_skb(skb);
4149 buffer_info->page = NULL;
4150 buffer_info->skb = NULL;
4151 buffer_info->dma = 0;
4152 adapter->alloc_rx_buff_failed++;
4153 break; /* while !buffer_info->skb */
4154 }
4155 }
4156
4157 rx_desc = E1000_RX_DESC(*rx_ring, i);
4158 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4159
4160 if (unlikely(++i == rx_ring->count))
4161 i = 0;
4162 buffer_info = &rx_ring->buffer_info[i];
4163 }
4164
4165 if (likely(rx_ring->next_to_use != i)) {
4166 rx_ring->next_to_use = i;
4167 if (unlikely(i-- == 0))
4168 i = (rx_ring->count - 1);
4169
4170 /* Force memory writes to complete before letting h/w
4171 * know there are new descriptors to fetch. (Only
4172 * applicable for weak-ordered memory model archs,
4173 * such as IA-64). */
4174 wmb();
4175 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4176 }
4177 }
4178
4179 /**
4180 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4181 * @adapter: address of board private structure
4182 **/
4183
4184 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4185 struct e1000_rx_ring *rx_ring,
4186 int cleaned_count)
4187 {
4188 struct e1000_hw *hw = &adapter->hw;
4189 struct net_device *netdev = adapter->netdev;
4190 struct pci_dev *pdev = adapter->pdev;
4191 struct e1000_rx_desc *rx_desc;
4192 struct e1000_buffer *buffer_info;
4193 struct sk_buff *skb;
4194 unsigned int i;
4195 unsigned int bufsz = adapter->rx_buffer_len;
4196
4197 i = rx_ring->next_to_use;
4198 buffer_info = &rx_ring->buffer_info[i];
4199
4200 while (cleaned_count--) {
4201 skb = buffer_info->skb;
4202 if (skb) {
4203 skb_trim(skb, 0);
4204 goto map_skb;
4205 }
4206
4207 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4208 if (unlikely(!skb)) {
4209 /* Better luck next round */
4210 adapter->alloc_rx_buff_failed++;
4211 break;
4212 }
4213
4214 /* Fix for errata 23, can't cross 64kB boundary */
4215 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4216 struct sk_buff *oldskb = skb;
4217 e_err(rx_err, "skb align check failed: %u bytes at "
4218 "%p\n", bufsz, skb->data);
4219 /* Try again, without freeing the previous */
4220 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4221 /* Failed allocation, critical failure */
4222 if (!skb) {
4223 dev_kfree_skb(oldskb);
4224 adapter->alloc_rx_buff_failed++;
4225 break;
4226 }
4227
4228 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4229 /* give up */
4230 dev_kfree_skb(skb);
4231 dev_kfree_skb(oldskb);
4232 adapter->alloc_rx_buff_failed++;
4233 break; /* while !buffer_info->skb */
4234 }
4235
4236 /* Use new allocation */
4237 dev_kfree_skb(oldskb);
4238 }
4239 buffer_info->skb = skb;
4240 buffer_info->length = adapter->rx_buffer_len;
4241 map_skb:
4242 buffer_info->dma = dma_map_single(&pdev->dev,
4243 skb->data,
4244 buffer_info->length,
4245 DMA_FROM_DEVICE);
4246 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4247 dev_kfree_skb(skb);
4248 buffer_info->skb = NULL;
4249 buffer_info->dma = 0;
4250 adapter->alloc_rx_buff_failed++;
4251 break; /* while !buffer_info->skb */
4252 }
4253
4254 /*
4255 * XXX if it was allocated cleanly it will never map to a
4256 * boundary crossing
4257 */
4258
4259 /* Fix for errata 23, can't cross 64kB boundary */
4260 if (!e1000_check_64k_bound(adapter,
4261 (void *)(unsigned long)buffer_info->dma,
4262 adapter->rx_buffer_len)) {
4263 e_err(rx_err, "dma align check failed: %u bytes at "
4264 "%p\n", adapter->rx_buffer_len,
4265 (void *)(unsigned long)buffer_info->dma);
4266 dev_kfree_skb(skb);
4267 buffer_info->skb = NULL;
4268
4269 dma_unmap_single(&pdev->dev, buffer_info->dma,
4270 adapter->rx_buffer_len,
4271 DMA_FROM_DEVICE);
4272 buffer_info->dma = 0;
4273
4274 adapter->alloc_rx_buff_failed++;
4275 break; /* while !buffer_info->skb */
4276 }
4277 rx_desc = E1000_RX_DESC(*rx_ring, i);
4278 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4279
4280 if (unlikely(++i == rx_ring->count))
4281 i = 0;
4282 buffer_info = &rx_ring->buffer_info[i];
4283 }
4284
4285 if (likely(rx_ring->next_to_use != i)) {
4286 rx_ring->next_to_use = i;
4287 if (unlikely(i-- == 0))
4288 i = (rx_ring->count - 1);
4289
4290 /* Force memory writes to complete before letting h/w
4291 * know there are new descriptors to fetch. (Only
4292 * applicable for weak-ordered memory model archs,
4293 * such as IA-64). */
4294 wmb();
4295 writel(i, hw->hw_addr + rx_ring->rdt);
4296 }
4297 }
4298
4299 /**
4300 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4301 * @adapter:
4302 **/
4303
4304 static void e1000_smartspeed(struct e1000_adapter *adapter)
4305 {
4306 struct e1000_hw *hw = &adapter->hw;
4307 u16 phy_status;
4308 u16 phy_ctrl;
4309
4310 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4311 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4312 return;
4313
4314 if (adapter->smartspeed == 0) {
4315 /* If Master/Slave config fault is asserted twice,
4316 * we assume back-to-back */
4317 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4318 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4319 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4320 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4321 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4322 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4323 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4324 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4325 phy_ctrl);
4326 adapter->smartspeed++;
4327 if (!e1000_phy_setup_autoneg(hw) &&
4328 !e1000_read_phy_reg(hw, PHY_CTRL,
4329 &phy_ctrl)) {
4330 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4331 MII_CR_RESTART_AUTO_NEG);
4332 e1000_write_phy_reg(hw, PHY_CTRL,
4333 phy_ctrl);
4334 }
4335 }
4336 return;
4337 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4338 /* If still no link, perhaps using 2/3 pair cable */
4339 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4340 phy_ctrl |= CR_1000T_MS_ENABLE;
4341 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4342 if (!e1000_phy_setup_autoneg(hw) &&
4343 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4344 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4345 MII_CR_RESTART_AUTO_NEG);
4346 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4347 }
4348 }
4349 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4350 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4351 adapter->smartspeed = 0;
4352 }
4353
4354 /**
4355 * e1000_ioctl -
4356 * @netdev:
4357 * @ifreq:
4358 * @cmd:
4359 **/
4360
4361 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4362 {
4363 switch (cmd) {
4364 case SIOCGMIIPHY:
4365 case SIOCGMIIREG:
4366 case SIOCSMIIREG:
4367 return e1000_mii_ioctl(netdev, ifr, cmd);
4368 default:
4369 return -EOPNOTSUPP;
4370 }
4371 }
4372
4373 /**
4374 * e1000_mii_ioctl -
4375 * @netdev:
4376 * @ifreq:
4377 * @cmd:
4378 **/
4379
4380 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4381 int cmd)
4382 {
4383 struct e1000_adapter *adapter = netdev_priv(netdev);
4384 struct e1000_hw *hw = &adapter->hw;
4385 struct mii_ioctl_data *data = if_mii(ifr);
4386 int retval;
4387 u16 mii_reg;
4388 unsigned long flags;
4389
4390 if (hw->media_type != e1000_media_type_copper)
4391 return -EOPNOTSUPP;
4392
4393 switch (cmd) {
4394 case SIOCGMIIPHY:
4395 data->phy_id = hw->phy_addr;
4396 break;
4397 case SIOCGMIIREG:
4398 spin_lock_irqsave(&adapter->stats_lock, flags);
4399 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4400 &data->val_out)) {
4401 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4402 return -EIO;
4403 }
4404 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4405 break;
4406 case SIOCSMIIREG:
4407 if (data->reg_num & ~(0x1F))
4408 return -EFAULT;
4409 mii_reg = data->val_in;
4410 spin_lock_irqsave(&adapter->stats_lock, flags);
4411 if (e1000_write_phy_reg(hw, data->reg_num,
4412 mii_reg)) {
4413 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4414 return -EIO;
4415 }
4416 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4417 if (hw->media_type == e1000_media_type_copper) {
4418 switch (data->reg_num) {
4419 case PHY_CTRL:
4420 if (mii_reg & MII_CR_POWER_DOWN)
4421 break;
4422 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4423 hw->autoneg = 1;
4424 hw->autoneg_advertised = 0x2F;
4425 } else {
4426 u32 speed;
4427 if (mii_reg & 0x40)
4428 speed = SPEED_1000;
4429 else if (mii_reg & 0x2000)
4430 speed = SPEED_100;
4431 else
4432 speed = SPEED_10;
4433 retval = e1000_set_spd_dplx(
4434 adapter, speed,
4435 ((mii_reg & 0x100)
4436 ? DUPLEX_FULL :
4437 DUPLEX_HALF));
4438 if (retval)
4439 return retval;
4440 }
4441 if (netif_running(adapter->netdev))
4442 e1000_reinit_locked(adapter);
4443 else
4444 e1000_reset(adapter);
4445 break;
4446 case M88E1000_PHY_SPEC_CTRL:
4447 case M88E1000_EXT_PHY_SPEC_CTRL:
4448 if (e1000_phy_reset(hw))
4449 return -EIO;
4450 break;
4451 }
4452 } else {
4453 switch (data->reg_num) {
4454 case PHY_CTRL:
4455 if (mii_reg & MII_CR_POWER_DOWN)
4456 break;
4457 if (netif_running(adapter->netdev))
4458 e1000_reinit_locked(adapter);
4459 else
4460 e1000_reset(adapter);
4461 break;
4462 }
4463 }
4464 break;
4465 default:
4466 return -EOPNOTSUPP;
4467 }
4468 return E1000_SUCCESS;
4469 }
4470
4471 void e1000_pci_set_mwi(struct e1000_hw *hw)
4472 {
4473 struct e1000_adapter *adapter = hw->back;
4474 int ret_val = pci_set_mwi(adapter->pdev);
4475
4476 if (ret_val)
4477 e_err(probe, "Error in setting MWI\n");
4478 }
4479
4480 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4481 {
4482 struct e1000_adapter *adapter = hw->back;
4483
4484 pci_clear_mwi(adapter->pdev);
4485 }
4486
4487 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4488 {
4489 struct e1000_adapter *adapter = hw->back;
4490 return pcix_get_mmrbc(adapter->pdev);
4491 }
4492
4493 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4494 {
4495 struct e1000_adapter *adapter = hw->back;
4496 pcix_set_mmrbc(adapter->pdev, mmrbc);
4497 }
4498
4499 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4500 {
4501 outl(value, port);
4502 }
4503
4504 static void e1000_vlan_rx_register(struct net_device *netdev,
4505 struct vlan_group *grp)
4506 {
4507 struct e1000_adapter *adapter = netdev_priv(netdev);
4508 struct e1000_hw *hw = &adapter->hw;
4509 u32 ctrl, rctl;
4510
4511 if (!test_bit(__E1000_DOWN, &adapter->flags))
4512 e1000_irq_disable(adapter);
4513 adapter->vlgrp = grp;
4514
4515 if (grp) {
4516 /* enable VLAN tag insert/strip */
4517 ctrl = er32(CTRL);
4518 ctrl |= E1000_CTRL_VME;
4519 ew32(CTRL, ctrl);
4520
4521 /* enable VLAN receive filtering */
4522 rctl = er32(RCTL);
4523 rctl &= ~E1000_RCTL_CFIEN;
4524 if (!(netdev->flags & IFF_PROMISC))
4525 rctl |= E1000_RCTL_VFE;
4526 ew32(RCTL, rctl);
4527 e1000_update_mng_vlan(adapter);
4528 } else {
4529 /* disable VLAN tag insert/strip */
4530 ctrl = er32(CTRL);
4531 ctrl &= ~E1000_CTRL_VME;
4532 ew32(CTRL, ctrl);
4533
4534 /* disable VLAN receive filtering */
4535 rctl = er32(RCTL);
4536 rctl &= ~E1000_RCTL_VFE;
4537 ew32(RCTL, rctl);
4538
4539 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
4540 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4541 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4542 }
4543 }
4544
4545 if (!test_bit(__E1000_DOWN, &adapter->flags))
4546 e1000_irq_enable(adapter);
4547 }
4548
4549 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4550 {
4551 struct e1000_adapter *adapter = netdev_priv(netdev);
4552 struct e1000_hw *hw = &adapter->hw;
4553 u32 vfta, index;
4554
4555 if ((hw->mng_cookie.status &
4556 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4557 (vid == adapter->mng_vlan_id))
4558 return;
4559 /* add VID to filter table */
4560 index = (vid >> 5) & 0x7F;
4561 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4562 vfta |= (1 << (vid & 0x1F));
4563 e1000_write_vfta(hw, index, vfta);
4564 }
4565
4566 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4567 {
4568 struct e1000_adapter *adapter = netdev_priv(netdev);
4569 struct e1000_hw *hw = &adapter->hw;
4570 u32 vfta, index;
4571
4572 if (!test_bit(__E1000_DOWN, &adapter->flags))
4573 e1000_irq_disable(adapter);
4574 vlan_group_set_device(adapter->vlgrp, vid, NULL);
4575 if (!test_bit(__E1000_DOWN, &adapter->flags))
4576 e1000_irq_enable(adapter);
4577
4578 /* remove VID from filter table */
4579 index = (vid >> 5) & 0x7F;
4580 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4581 vfta &= ~(1 << (vid & 0x1F));
4582 e1000_write_vfta(hw, index, vfta);
4583 }
4584
4585 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4586 {
4587 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4588
4589 if (adapter->vlgrp) {
4590 u16 vid;
4591 for (vid = 0; vid < VLAN_N_VID; vid++) {
4592 if (!vlan_group_get_device(adapter->vlgrp, vid))
4593 continue;
4594 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4595 }
4596 }
4597 }
4598
4599 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4600 {
4601 struct e1000_hw *hw = &adapter->hw;
4602
4603 hw->autoneg = 0;
4604
4605 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4606 * for the switch() below to work */
4607 if ((spd & 1) || (dplx & ~1))
4608 goto err_inval;
4609
4610 /* Fiber NICs only allow 1000 gbps Full duplex */
4611 if ((hw->media_type == e1000_media_type_fiber) &&
4612 spd != SPEED_1000 &&
4613 dplx != DUPLEX_FULL)
4614 goto err_inval;
4615
4616 switch (spd + dplx) {
4617 case SPEED_10 + DUPLEX_HALF:
4618 hw->forced_speed_duplex = e1000_10_half;
4619 break;
4620 case SPEED_10 + DUPLEX_FULL:
4621 hw->forced_speed_duplex = e1000_10_full;
4622 break;
4623 case SPEED_100 + DUPLEX_HALF:
4624 hw->forced_speed_duplex = e1000_100_half;
4625 break;
4626 case SPEED_100 + DUPLEX_FULL:
4627 hw->forced_speed_duplex = e1000_100_full;
4628 break;
4629 case SPEED_1000 + DUPLEX_FULL:
4630 hw->autoneg = 1;
4631 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4632 break;
4633 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4634 default:
4635 goto err_inval;
4636 }
4637 return 0;
4638
4639 err_inval:
4640 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4641 return -EINVAL;
4642 }
4643
4644 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4645 {
4646 struct net_device *netdev = pci_get_drvdata(pdev);
4647 struct e1000_adapter *adapter = netdev_priv(netdev);
4648 struct e1000_hw *hw = &adapter->hw;
4649 u32 ctrl, ctrl_ext, rctl, status;
4650 u32 wufc = adapter->wol;
4651 #ifdef CONFIG_PM
4652 int retval = 0;
4653 #endif
4654
4655 netif_device_detach(netdev);
4656
4657 if (netif_running(netdev)) {
4658 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4659 e1000_down(adapter);
4660 }
4661
4662 #ifdef CONFIG_PM
4663 retval = pci_save_state(pdev);
4664 if (retval)
4665 return retval;
4666 #endif
4667
4668 status = er32(STATUS);
4669 if (status & E1000_STATUS_LU)
4670 wufc &= ~E1000_WUFC_LNKC;
4671
4672 if (wufc) {
4673 e1000_setup_rctl(adapter);
4674 e1000_set_rx_mode(netdev);
4675
4676 /* turn on all-multi mode if wake on multicast is enabled */
4677 if (wufc & E1000_WUFC_MC) {
4678 rctl = er32(RCTL);
4679 rctl |= E1000_RCTL_MPE;
4680 ew32(RCTL, rctl);
4681 }
4682
4683 if (hw->mac_type >= e1000_82540) {
4684 ctrl = er32(CTRL);
4685 /* advertise wake from D3Cold */
4686 #define E1000_CTRL_ADVD3WUC 0x00100000
4687 /* phy power management enable */
4688 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4689 ctrl |= E1000_CTRL_ADVD3WUC |
4690 E1000_CTRL_EN_PHY_PWR_MGMT;
4691 ew32(CTRL, ctrl);
4692 }
4693
4694 if (hw->media_type == e1000_media_type_fiber ||
4695 hw->media_type == e1000_media_type_internal_serdes) {
4696 /* keep the laser running in D3 */
4697 ctrl_ext = er32(CTRL_EXT);
4698 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4699 ew32(CTRL_EXT, ctrl_ext);
4700 }
4701
4702 ew32(WUC, E1000_WUC_PME_EN);
4703 ew32(WUFC, wufc);
4704 } else {
4705 ew32(WUC, 0);
4706 ew32(WUFC, 0);
4707 }
4708
4709 e1000_release_manageability(adapter);
4710
4711 *enable_wake = !!wufc;
4712
4713 /* make sure adapter isn't asleep if manageability is enabled */
4714 if (adapter->en_mng_pt)
4715 *enable_wake = true;
4716
4717 if (netif_running(netdev))
4718 e1000_free_irq(adapter);
4719
4720 pci_disable_device(pdev);
4721
4722 return 0;
4723 }
4724
4725 #ifdef CONFIG_PM
4726 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4727 {
4728 int retval;
4729 bool wake;
4730
4731 retval = __e1000_shutdown(pdev, &wake);
4732 if (retval)
4733 return retval;
4734
4735 if (wake) {
4736 pci_prepare_to_sleep(pdev);
4737 } else {
4738 pci_wake_from_d3(pdev, false);
4739 pci_set_power_state(pdev, PCI_D3hot);
4740 }
4741
4742 return 0;
4743 }
4744
4745 static int e1000_resume(struct pci_dev *pdev)
4746 {
4747 struct net_device *netdev = pci_get_drvdata(pdev);
4748 struct e1000_adapter *adapter = netdev_priv(netdev);
4749 struct e1000_hw *hw = &adapter->hw;
4750 u32 err;
4751
4752 pci_set_power_state(pdev, PCI_D0);
4753 pci_restore_state(pdev);
4754 pci_save_state(pdev);
4755
4756 if (adapter->need_ioport)
4757 err = pci_enable_device(pdev);
4758 else
4759 err = pci_enable_device_mem(pdev);
4760 if (err) {
4761 pr_err("Cannot enable PCI device from suspend\n");
4762 return err;
4763 }
4764 pci_set_master(pdev);
4765
4766 pci_enable_wake(pdev, PCI_D3hot, 0);
4767 pci_enable_wake(pdev, PCI_D3cold, 0);
4768
4769 if (netif_running(netdev)) {
4770 err = e1000_request_irq(adapter);
4771 if (err)
4772 return err;
4773 }
4774
4775 e1000_power_up_phy(adapter);
4776 e1000_reset(adapter);
4777 ew32(WUS, ~0);
4778
4779 e1000_init_manageability(adapter);
4780
4781 if (netif_running(netdev))
4782 e1000_up(adapter);
4783
4784 netif_device_attach(netdev);
4785
4786 return 0;
4787 }
4788 #endif
4789
4790 static void e1000_shutdown(struct pci_dev *pdev)
4791 {
4792 bool wake;
4793
4794 __e1000_shutdown(pdev, &wake);
4795
4796 if (system_state == SYSTEM_POWER_OFF) {
4797 pci_wake_from_d3(pdev, wake);
4798 pci_set_power_state(pdev, PCI_D3hot);
4799 }
4800 }
4801
4802 #ifdef CONFIG_NET_POLL_CONTROLLER
4803 /*
4804 * Polling 'interrupt' - used by things like netconsole to send skbs
4805 * without having to re-enable interrupts. It's not called while
4806 * the interrupt routine is executing.
4807 */
4808 static void e1000_netpoll(struct net_device *netdev)
4809 {
4810 struct e1000_adapter *adapter = netdev_priv(netdev);
4811
4812 disable_irq(adapter->pdev->irq);
4813 e1000_intr(adapter->pdev->irq, netdev);
4814 enable_irq(adapter->pdev->irq);
4815 }
4816 #endif
4817
4818 /**
4819 * e1000_io_error_detected - called when PCI error is detected
4820 * @pdev: Pointer to PCI device
4821 * @state: The current pci connection state
4822 *
4823 * This function is called after a PCI bus error affecting
4824 * this device has been detected.
4825 */
4826 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4827 pci_channel_state_t state)
4828 {
4829 struct net_device *netdev = pci_get_drvdata(pdev);
4830 struct e1000_adapter *adapter = netdev_priv(netdev);
4831
4832 netif_device_detach(netdev);
4833
4834 if (state == pci_channel_io_perm_failure)
4835 return PCI_ERS_RESULT_DISCONNECT;
4836
4837 if (netif_running(netdev))
4838 e1000_down(adapter);
4839 pci_disable_device(pdev);
4840
4841 /* Request a slot slot reset. */
4842 return PCI_ERS_RESULT_NEED_RESET;
4843 }
4844
4845 /**
4846 * e1000_io_slot_reset - called after the pci bus has been reset.
4847 * @pdev: Pointer to PCI device
4848 *
4849 * Restart the card from scratch, as if from a cold-boot. Implementation
4850 * resembles the first-half of the e1000_resume routine.
4851 */
4852 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4853 {
4854 struct net_device *netdev = pci_get_drvdata(pdev);
4855 struct e1000_adapter *adapter = netdev_priv(netdev);
4856 struct e1000_hw *hw = &adapter->hw;
4857 int err;
4858
4859 if (adapter->need_ioport)
4860 err = pci_enable_device(pdev);
4861 else
4862 err = pci_enable_device_mem(pdev);
4863 if (err) {
4864 pr_err("Cannot re-enable PCI device after reset.\n");
4865 return PCI_ERS_RESULT_DISCONNECT;
4866 }
4867 pci_set_master(pdev);
4868
4869 pci_enable_wake(pdev, PCI_D3hot, 0);
4870 pci_enable_wake(pdev, PCI_D3cold, 0);
4871
4872 e1000_reset(adapter);
4873 ew32(WUS, ~0);
4874
4875 return PCI_ERS_RESULT_RECOVERED;
4876 }
4877
4878 /**
4879 * e1000_io_resume - called when traffic can start flowing again.
4880 * @pdev: Pointer to PCI device
4881 *
4882 * This callback is called when the error recovery driver tells us that
4883 * its OK to resume normal operation. Implementation resembles the
4884 * second-half of the e1000_resume routine.
4885 */
4886 static void e1000_io_resume(struct pci_dev *pdev)
4887 {
4888 struct net_device *netdev = pci_get_drvdata(pdev);
4889 struct e1000_adapter *adapter = netdev_priv(netdev);
4890
4891 e1000_init_manageability(adapter);
4892
4893 if (netif_running(netdev)) {
4894 if (e1000_up(adapter)) {
4895 pr_info("can't bring device back up after reset\n");
4896 return;
4897 }
4898 }
4899
4900 netif_device_attach(netdev);
4901 }
4902
4903 /* e1000_main.c */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree