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1/*******************************************************************************
2
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
29#include "e1000.h"
30#include <net/ip6_checksum.h>
31#include <linux/io.h>
32#include <linux/prefetch.h>
33#include <linux/bitops.h>
34#include <linux/if_vlan.h>
35
36char e1000_driver_name[] = "e1000";
37static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
38#define DRV_VERSION "7.3.21-k8-NAPI"
39const char e1000_driver_version[] = DRV_VERSION;
40static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
41
42/* e1000_pci_tbl - PCI Device ID Table
43 *
44 * Last entry must be all 0s
45 *
46 * Macro expands to...
47 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
48 */
49static const struct pci_device_id e1000_pci_tbl[] = {
50 INTEL_E1000_ETHERNET_DEVICE(0x1000),
51 INTEL_E1000_ETHERNET_DEVICE(0x1001),
52 INTEL_E1000_ETHERNET_DEVICE(0x1004),
53 INTEL_E1000_ETHERNET_DEVICE(0x1008),
54 INTEL_E1000_ETHERNET_DEVICE(0x1009),
55 INTEL_E1000_ETHERNET_DEVICE(0x100C),
56 INTEL_E1000_ETHERNET_DEVICE(0x100D),
57 INTEL_E1000_ETHERNET_DEVICE(0x100E),
58 INTEL_E1000_ETHERNET_DEVICE(0x100F),
59 INTEL_E1000_ETHERNET_DEVICE(0x1010),
60 INTEL_E1000_ETHERNET_DEVICE(0x1011),
61 INTEL_E1000_ETHERNET_DEVICE(0x1012),
62 INTEL_E1000_ETHERNET_DEVICE(0x1013),
63 INTEL_E1000_ETHERNET_DEVICE(0x1014),
64 INTEL_E1000_ETHERNET_DEVICE(0x1015),
65 INTEL_E1000_ETHERNET_DEVICE(0x1016),
66 INTEL_E1000_ETHERNET_DEVICE(0x1017),
67 INTEL_E1000_ETHERNET_DEVICE(0x1018),
68 INTEL_E1000_ETHERNET_DEVICE(0x1019),
69 INTEL_E1000_ETHERNET_DEVICE(0x101A),
70 INTEL_E1000_ETHERNET_DEVICE(0x101D),
71 INTEL_E1000_ETHERNET_DEVICE(0x101E),
72 INTEL_E1000_ETHERNET_DEVICE(0x1026),
73 INTEL_E1000_ETHERNET_DEVICE(0x1027),
74 INTEL_E1000_ETHERNET_DEVICE(0x1028),
75 INTEL_E1000_ETHERNET_DEVICE(0x1075),
76 INTEL_E1000_ETHERNET_DEVICE(0x1076),
77 INTEL_E1000_ETHERNET_DEVICE(0x1077),
78 INTEL_E1000_ETHERNET_DEVICE(0x1078),
79 INTEL_E1000_ETHERNET_DEVICE(0x1079),
80 INTEL_E1000_ETHERNET_DEVICE(0x107A),
81 INTEL_E1000_ETHERNET_DEVICE(0x107B),
82 INTEL_E1000_ETHERNET_DEVICE(0x107C),
83 INTEL_E1000_ETHERNET_DEVICE(0x108A),
84 INTEL_E1000_ETHERNET_DEVICE(0x1099),
85 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
86 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
87 /* required last entry */
88 {0,}
89};
90
91MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
92
93int e1000_up(struct e1000_adapter *adapter);
94void e1000_down(struct e1000_adapter *adapter);
95void e1000_reinit_locked(struct e1000_adapter *adapter);
96void e1000_reset(struct e1000_adapter *adapter);
97int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
98int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
99void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
100void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
101static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
102 struct e1000_tx_ring *txdr);
103static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
104 struct e1000_rx_ring *rxdr);
105static void e1000_free_tx_resources(struct e1000_adapter *adapter,
106 struct e1000_tx_ring *tx_ring);
107static void e1000_free_rx_resources(struct e1000_adapter *adapter,
108 struct e1000_rx_ring *rx_ring);
109void e1000_update_stats(struct e1000_adapter *adapter);
110
111static int e1000_init_module(void);
112static void e1000_exit_module(void);
113static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
114static void e1000_remove(struct pci_dev *pdev);
115static int e1000_alloc_queues(struct e1000_adapter *adapter);
116static int e1000_sw_init(struct e1000_adapter *adapter);
117static int e1000_open(struct net_device *netdev);
118static int e1000_close(struct net_device *netdev);
119static void e1000_configure_tx(struct e1000_adapter *adapter);
120static void e1000_configure_rx(struct e1000_adapter *adapter);
121static void e1000_setup_rctl(struct e1000_adapter *adapter);
122static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
123static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
124static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
125 struct e1000_tx_ring *tx_ring);
126static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
127 struct e1000_rx_ring *rx_ring);
128static void e1000_set_rx_mode(struct net_device *netdev);
129static void e1000_update_phy_info_task(struct work_struct *work);
130static void e1000_watchdog(struct work_struct *work);
131static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
132static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
133 struct net_device *netdev);
134static struct net_device_stats *e1000_get_stats(struct net_device *netdev);
135static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
136static int e1000_set_mac(struct net_device *netdev, void *p);
137static irqreturn_t e1000_intr(int irq, void *data);
138static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
139 struct e1000_tx_ring *tx_ring);
140static int e1000_clean(struct napi_struct *napi, int budget);
141static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
142 struct e1000_rx_ring *rx_ring,
143 int *work_done, int work_to_do);
144static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
145 struct e1000_rx_ring *rx_ring,
146 int *work_done, int work_to_do);
147static void e1000_alloc_dummy_rx_buffers(struct e1000_adapter *adapter,
148 struct e1000_rx_ring *rx_ring,
149 int cleaned_count)
150{
151}
152static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
153 struct e1000_rx_ring *rx_ring,
154 int cleaned_count);
155static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
156 struct e1000_rx_ring *rx_ring,
157 int cleaned_count);
158static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
159static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
160 int cmd);
161static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
162static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
163static void e1000_tx_timeout(struct net_device *dev);
164static void e1000_reset_task(struct work_struct *work);
165static void e1000_smartspeed(struct e1000_adapter *adapter);
166static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
167 struct sk_buff *skb);
168
169static bool e1000_vlan_used(struct e1000_adapter *adapter);
170static void e1000_vlan_mode(struct net_device *netdev,
171 netdev_features_t features);
172static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
173 bool filter_on);
174static int e1000_vlan_rx_add_vid(struct net_device *netdev,
175 __be16 proto, u16 vid);
176static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
177 __be16 proto, u16 vid);
178static void e1000_restore_vlan(struct e1000_adapter *adapter);
179
180#ifdef CONFIG_PM
181static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
182static int e1000_resume(struct pci_dev *pdev);
183#endif
184static void e1000_shutdown(struct pci_dev *pdev);
185
186#ifdef CONFIG_NET_POLL_CONTROLLER
187/* for netdump / net console */
188static void e1000_netpoll (struct net_device *netdev);
189#endif
190
191#define COPYBREAK_DEFAULT 256
192static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
193module_param(copybreak, uint, 0644);
194MODULE_PARM_DESC(copybreak,
195 "Maximum size of packet that is copied to a new buffer on receive");
196
197static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
198 pci_channel_state_t state);
199static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
200static void e1000_io_resume(struct pci_dev *pdev);
201
202static const struct pci_error_handlers e1000_err_handler = {
203 .error_detected = e1000_io_error_detected,
204 .slot_reset = e1000_io_slot_reset,
205 .resume = e1000_io_resume,
206};
207
208static struct pci_driver e1000_driver = {
209 .name = e1000_driver_name,
210 .id_table = e1000_pci_tbl,
211 .probe = e1000_probe,
212 .remove = e1000_remove,
213#ifdef CONFIG_PM
214 /* Power Management Hooks */
215 .suspend = e1000_suspend,
216 .resume = e1000_resume,
217#endif
218 .shutdown = e1000_shutdown,
219 .err_handler = &e1000_err_handler
220};
221
222MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
223MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
224MODULE_LICENSE("GPL");
225MODULE_VERSION(DRV_VERSION);
226
227#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
228static int debug = -1;
229module_param(debug, int, 0);
230MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
231
232/**
233 * e1000_get_hw_dev - return device
234 * used by hardware layer to print debugging information
235 *
236 **/
237struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
238{
239 struct e1000_adapter *adapter = hw->back;
240 return adapter->netdev;
241}
242
243/**
244 * e1000_init_module - Driver Registration Routine
245 *
246 * e1000_init_module is the first routine called when the driver is
247 * loaded. All it does is register with the PCI subsystem.
248 **/
249static int __init e1000_init_module(void)
250{
251 int ret;
252 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
253
254 pr_info("%s\n", e1000_copyright);
255
256 ret = pci_register_driver(&e1000_driver);
257 if (copybreak != COPYBREAK_DEFAULT) {
258 if (copybreak == 0)
259 pr_info("copybreak disabled\n");
260 else
261 pr_info("copybreak enabled for "
262 "packets <= %u bytes\n", copybreak);
263 }
264 return ret;
265}
266
267module_init(e1000_init_module);
268
269/**
270 * e1000_exit_module - Driver Exit Cleanup Routine
271 *
272 * e1000_exit_module is called just before the driver is removed
273 * from memory.
274 **/
275static void __exit e1000_exit_module(void)
276{
277 pci_unregister_driver(&e1000_driver);
278}
279
280module_exit(e1000_exit_module);
281
282static int e1000_request_irq(struct e1000_adapter *adapter)
283{
284 struct net_device *netdev = adapter->netdev;
285 irq_handler_t handler = e1000_intr;
286 int irq_flags = IRQF_SHARED;
287 int err;
288
289 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
290 netdev);
291 if (err) {
292 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
293 }
294
295 return err;
296}
297
298static void e1000_free_irq(struct e1000_adapter *adapter)
299{
300 struct net_device *netdev = adapter->netdev;
301
302 free_irq(adapter->pdev->irq, netdev);
303}
304
305/**
306 * e1000_irq_disable - Mask off interrupt generation on the NIC
307 * @adapter: board private structure
308 **/
309static void e1000_irq_disable(struct e1000_adapter *adapter)
310{
311 struct e1000_hw *hw = &adapter->hw;
312
313 ew32(IMC, ~0);
314 E1000_WRITE_FLUSH();
315 synchronize_irq(adapter->pdev->irq);
316}
317
318/**
319 * e1000_irq_enable - Enable default interrupt generation settings
320 * @adapter: board private structure
321 **/
322static void e1000_irq_enable(struct e1000_adapter *adapter)
323{
324 struct e1000_hw *hw = &adapter->hw;
325
326 ew32(IMS, IMS_ENABLE_MASK);
327 E1000_WRITE_FLUSH();
328}
329
330static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
331{
332 struct e1000_hw *hw = &adapter->hw;
333 struct net_device *netdev = adapter->netdev;
334 u16 vid = hw->mng_cookie.vlan_id;
335 u16 old_vid = adapter->mng_vlan_id;
336
337 if (!e1000_vlan_used(adapter))
338 return;
339
340 if (!test_bit(vid, adapter->active_vlans)) {
341 if (hw->mng_cookie.status &
342 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
343 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
344 adapter->mng_vlan_id = vid;
345 } else {
346 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
347 }
348 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
349 (vid != old_vid) &&
350 !test_bit(old_vid, adapter->active_vlans))
351 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
352 old_vid);
353 } else {
354 adapter->mng_vlan_id = vid;
355 }
356}
357
358static void e1000_init_manageability(struct e1000_adapter *adapter)
359{
360 struct e1000_hw *hw = &adapter->hw;
361
362 if (adapter->en_mng_pt) {
363 u32 manc = er32(MANC);
364
365 /* disable hardware interception of ARP */
366 manc &= ~(E1000_MANC_ARP_EN);
367
368 ew32(MANC, manc);
369 }
370}
371
372static void e1000_release_manageability(struct e1000_adapter *adapter)
373{
374 struct e1000_hw *hw = &adapter->hw;
375
376 if (adapter->en_mng_pt) {
377 u32 manc = er32(MANC);
378
379 /* re-enable hardware interception of ARP */
380 manc |= E1000_MANC_ARP_EN;
381
382 ew32(MANC, manc);
383 }
384}
385
386/**
387 * e1000_configure - configure the hardware for RX and TX
388 * @adapter = private board structure
389 **/
390static void e1000_configure(struct e1000_adapter *adapter)
391{
392 struct net_device *netdev = adapter->netdev;
393 int i;
394
395 e1000_set_rx_mode(netdev);
396
397 e1000_restore_vlan(adapter);
398 e1000_init_manageability(adapter);
399
400 e1000_configure_tx(adapter);
401 e1000_setup_rctl(adapter);
402 e1000_configure_rx(adapter);
403 /* call E1000_DESC_UNUSED which always leaves
404 * at least 1 descriptor unused to make sure
405 * next_to_use != next_to_clean
406 */
407 for (i = 0; i < adapter->num_rx_queues; i++) {
408 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
409 adapter->alloc_rx_buf(adapter, ring,
410 E1000_DESC_UNUSED(ring));
411 }
412}
413
414int e1000_up(struct e1000_adapter *adapter)
415{
416 struct e1000_hw *hw = &adapter->hw;
417
418 /* hardware has been reset, we need to reload some things */
419 e1000_configure(adapter);
420
421 clear_bit(__E1000_DOWN, &adapter->flags);
422
423 napi_enable(&adapter->napi);
424
425 e1000_irq_enable(adapter);
426
427 netif_wake_queue(adapter->netdev);
428
429 /* fire a link change interrupt to start the watchdog */
430 ew32(ICS, E1000_ICS_LSC);
431 return 0;
432}
433
434/**
435 * e1000_power_up_phy - restore link in case the phy was powered down
436 * @adapter: address of board private structure
437 *
438 * The phy may be powered down to save power and turn off link when the
439 * driver is unloaded and wake on lan is not enabled (among others)
440 * *** this routine MUST be followed by a call to e1000_reset ***
441 **/
442void e1000_power_up_phy(struct e1000_adapter *adapter)
443{
444 struct e1000_hw *hw = &adapter->hw;
445 u16 mii_reg = 0;
446
447 /* Just clear the power down bit to wake the phy back up */
448 if (hw->media_type == e1000_media_type_copper) {
449 /* according to the manual, the phy will retain its
450 * settings across a power-down/up cycle
451 */
452 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
453 mii_reg &= ~MII_CR_POWER_DOWN;
454 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
455 }
456}
457
458static void e1000_power_down_phy(struct e1000_adapter *adapter)
459{
460 struct e1000_hw *hw = &adapter->hw;
461
462 /* Power down the PHY so no link is implied when interface is down *
463 * The PHY cannot be powered down if any of the following is true *
464 * (a) WoL is enabled
465 * (b) AMT is active
466 * (c) SoL/IDER session is active
467 */
468 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
469 hw->media_type == e1000_media_type_copper) {
470 u16 mii_reg = 0;
471
472 switch (hw->mac_type) {
473 case e1000_82540:
474 case e1000_82545:
475 case e1000_82545_rev_3:
476 case e1000_82546:
477 case e1000_ce4100:
478 case e1000_82546_rev_3:
479 case e1000_82541:
480 case e1000_82541_rev_2:
481 case e1000_82547:
482 case e1000_82547_rev_2:
483 if (er32(MANC) & E1000_MANC_SMBUS_EN)
484 goto out;
485 break;
486 default:
487 goto out;
488 }
489 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
490 mii_reg |= MII_CR_POWER_DOWN;
491 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
492 msleep(1);
493 }
494out:
495 return;
496}
497
498static void e1000_down_and_stop(struct e1000_adapter *adapter)
499{
500 set_bit(__E1000_DOWN, &adapter->flags);
501
502 cancel_delayed_work_sync(&adapter->watchdog_task);
503
504 /*
505 * Since the watchdog task can reschedule other tasks, we should cancel
506 * it first, otherwise we can run into the situation when a work is
507 * still running after the adapter has been turned down.
508 */
509
510 cancel_delayed_work_sync(&adapter->phy_info_task);
511 cancel_delayed_work_sync(&adapter->fifo_stall_task);
512
513 /* Only kill reset task if adapter is not resetting */
514 if (!test_bit(__E1000_RESETTING, &adapter->flags))
515 cancel_work_sync(&adapter->reset_task);
516}
517
518void e1000_down(struct e1000_adapter *adapter)
519{
520 struct e1000_hw *hw = &adapter->hw;
521 struct net_device *netdev = adapter->netdev;
522 u32 rctl, tctl;
523
524 netif_carrier_off(netdev);
525
526 /* disable receives in the hardware */
527 rctl = er32(RCTL);
528 ew32(RCTL, rctl & ~E1000_RCTL_EN);
529 /* flush and sleep below */
530
531 netif_tx_disable(netdev);
532
533 /* disable transmits in the hardware */
534 tctl = er32(TCTL);
535 tctl &= ~E1000_TCTL_EN;
536 ew32(TCTL, tctl);
537 /* flush both disables and wait for them to finish */
538 E1000_WRITE_FLUSH();
539 msleep(10);
540
541 napi_disable(&adapter->napi);
542
543 e1000_irq_disable(adapter);
544
545 /* Setting DOWN must be after irq_disable to prevent
546 * a screaming interrupt. Setting DOWN also prevents
547 * tasks from rescheduling.
548 */
549 e1000_down_and_stop(adapter);
550
551 adapter->link_speed = 0;
552 adapter->link_duplex = 0;
553
554 e1000_reset(adapter);
555 e1000_clean_all_tx_rings(adapter);
556 e1000_clean_all_rx_rings(adapter);
557}
558
559void e1000_reinit_locked(struct e1000_adapter *adapter)
560{
561 WARN_ON(in_interrupt());
562 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
563 msleep(1);
564 e1000_down(adapter);
565 e1000_up(adapter);
566 clear_bit(__E1000_RESETTING, &adapter->flags);
567}
568
569void e1000_reset(struct e1000_adapter *adapter)
570{
571 struct e1000_hw *hw = &adapter->hw;
572 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
573 bool legacy_pba_adjust = false;
574 u16 hwm;
575
576 /* Repartition Pba for greater than 9k mtu
577 * To take effect CTRL.RST is required.
578 */
579
580 switch (hw->mac_type) {
581 case e1000_82542_rev2_0:
582 case e1000_82542_rev2_1:
583 case e1000_82543:
584 case e1000_82544:
585 case e1000_82540:
586 case e1000_82541:
587 case e1000_82541_rev_2:
588 legacy_pba_adjust = true;
589 pba = E1000_PBA_48K;
590 break;
591 case e1000_82545:
592 case e1000_82545_rev_3:
593 case e1000_82546:
594 case e1000_ce4100:
595 case e1000_82546_rev_3:
596 pba = E1000_PBA_48K;
597 break;
598 case e1000_82547:
599 case e1000_82547_rev_2:
600 legacy_pba_adjust = true;
601 pba = E1000_PBA_30K;
602 break;
603 case e1000_undefined:
604 case e1000_num_macs:
605 break;
606 }
607
608 if (legacy_pba_adjust) {
609 if (hw->max_frame_size > E1000_RXBUFFER_8192)
610 pba -= 8; /* allocate more FIFO for Tx */
611
612 if (hw->mac_type == e1000_82547) {
613 adapter->tx_fifo_head = 0;
614 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
615 adapter->tx_fifo_size =
616 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
617 atomic_set(&adapter->tx_fifo_stall, 0);
618 }
619 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
620 /* adjust PBA for jumbo frames */
621 ew32(PBA, pba);
622
623 /* To maintain wire speed transmits, the Tx FIFO should be
624 * large enough to accommodate two full transmit packets,
625 * rounded up to the next 1KB and expressed in KB. Likewise,
626 * the Rx FIFO should be large enough to accommodate at least
627 * one full receive packet and is similarly rounded up and
628 * expressed in KB.
629 */
630 pba = er32(PBA);
631 /* upper 16 bits has Tx packet buffer allocation size in KB */
632 tx_space = pba >> 16;
633 /* lower 16 bits has Rx packet buffer allocation size in KB */
634 pba &= 0xffff;
635 /* the Tx fifo also stores 16 bytes of information about the Tx
636 * but don't include ethernet FCS because hardware appends it
637 */
638 min_tx_space = (hw->max_frame_size +
639 sizeof(struct e1000_tx_desc) -
640 ETH_FCS_LEN) * 2;
641 min_tx_space = ALIGN(min_tx_space, 1024);
642 min_tx_space >>= 10;
643 /* software strips receive CRC, so leave room for it */
644 min_rx_space = hw->max_frame_size;
645 min_rx_space = ALIGN(min_rx_space, 1024);
646 min_rx_space >>= 10;
647
648 /* If current Tx allocation is less than the min Tx FIFO size,
649 * and the min Tx FIFO size is less than the current Rx FIFO
650 * allocation, take space away from current Rx allocation
651 */
652 if (tx_space < min_tx_space &&
653 ((min_tx_space - tx_space) < pba)) {
654 pba = pba - (min_tx_space - tx_space);
655
656 /* PCI/PCIx hardware has PBA alignment constraints */
657 switch (hw->mac_type) {
658 case e1000_82545 ... e1000_82546_rev_3:
659 pba &= ~(E1000_PBA_8K - 1);
660 break;
661 default:
662 break;
663 }
664
665 /* if short on Rx space, Rx wins and must trump Tx
666 * adjustment or use Early Receive if available
667 */
668 if (pba < min_rx_space)
669 pba = min_rx_space;
670 }
671 }
672
673 ew32(PBA, pba);
674
675 /* flow control settings:
676 * The high water mark must be low enough to fit one full frame
677 * (or the size used for early receive) above it in the Rx FIFO.
678 * Set it to the lower of:
679 * - 90% of the Rx FIFO size, and
680 * - the full Rx FIFO size minus the early receive size (for parts
681 * with ERT support assuming ERT set to E1000_ERT_2048), or
682 * - the full Rx FIFO size minus one full frame
683 */
684 hwm = min(((pba << 10) * 9 / 10),
685 ((pba << 10) - hw->max_frame_size));
686
687 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
688 hw->fc_low_water = hw->fc_high_water - 8;
689 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
690 hw->fc_send_xon = 1;
691 hw->fc = hw->original_fc;
692
693 /* Allow time for pending master requests to run */
694 e1000_reset_hw(hw);
695 if (hw->mac_type >= e1000_82544)
696 ew32(WUC, 0);
697
698 if (e1000_init_hw(hw))
699 e_dev_err("Hardware Error\n");
700 e1000_update_mng_vlan(adapter);
701
702 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
703 if (hw->mac_type >= e1000_82544 &&
704 hw->autoneg == 1 &&
705 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
706 u32 ctrl = er32(CTRL);
707 /* clear phy power management bit if we are in gig only mode,
708 * which if enabled will attempt negotiation to 100Mb, which
709 * can cause a loss of link at power off or driver unload
710 */
711 ctrl &= ~E1000_CTRL_SWDPIN3;
712 ew32(CTRL, ctrl);
713 }
714
715 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
716 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
717
718 e1000_reset_adaptive(hw);
719 e1000_phy_get_info(hw, &adapter->phy_info);
720
721 e1000_release_manageability(adapter);
722}
723
724/* Dump the eeprom for users having checksum issues */
725static void e1000_dump_eeprom(struct e1000_adapter *adapter)
726{
727 struct net_device *netdev = adapter->netdev;
728 struct ethtool_eeprom eeprom;
729 const struct ethtool_ops *ops = netdev->ethtool_ops;
730 u8 *data;
731 int i;
732 u16 csum_old, csum_new = 0;
733
734 eeprom.len = ops->get_eeprom_len(netdev);
735 eeprom.offset = 0;
736
737 data = kmalloc(eeprom.len, GFP_KERNEL);
738 if (!data)
739 return;
740
741 ops->get_eeprom(netdev, &eeprom, data);
742
743 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
744 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
745 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
746 csum_new += data[i] + (data[i + 1] << 8);
747 csum_new = EEPROM_SUM - csum_new;
748
749 pr_err("/*********************/\n");
750 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
751 pr_err("Calculated : 0x%04x\n", csum_new);
752
753 pr_err("Offset Values\n");
754 pr_err("======== ======\n");
755 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
756
757 pr_err("Include this output when contacting your support provider.\n");
758 pr_err("This is not a software error! Something bad happened to\n");
759 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
760 pr_err("result in further problems, possibly loss of data,\n");
761 pr_err("corruption or system hangs!\n");
762 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
763 pr_err("which is invalid and requires you to set the proper MAC\n");
764 pr_err("address manually before continuing to enable this network\n");
765 pr_err("device. Please inspect the EEPROM dump and report the\n");
766 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
767 pr_err("/*********************/\n");
768
769 kfree(data);
770}
771
772/**
773 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
774 * @pdev: PCI device information struct
775 *
776 * Return true if an adapter needs ioport resources
777 **/
778static int e1000_is_need_ioport(struct pci_dev *pdev)
779{
780 switch (pdev->device) {
781 case E1000_DEV_ID_82540EM:
782 case E1000_DEV_ID_82540EM_LOM:
783 case E1000_DEV_ID_82540EP:
784 case E1000_DEV_ID_82540EP_LOM:
785 case E1000_DEV_ID_82540EP_LP:
786 case E1000_DEV_ID_82541EI:
787 case E1000_DEV_ID_82541EI_MOBILE:
788 case E1000_DEV_ID_82541ER:
789 case E1000_DEV_ID_82541ER_LOM:
790 case E1000_DEV_ID_82541GI:
791 case E1000_DEV_ID_82541GI_LF:
792 case E1000_DEV_ID_82541GI_MOBILE:
793 case E1000_DEV_ID_82544EI_COPPER:
794 case E1000_DEV_ID_82544EI_FIBER:
795 case E1000_DEV_ID_82544GC_COPPER:
796 case E1000_DEV_ID_82544GC_LOM:
797 case E1000_DEV_ID_82545EM_COPPER:
798 case E1000_DEV_ID_82545EM_FIBER:
799 case E1000_DEV_ID_82546EB_COPPER:
800 case E1000_DEV_ID_82546EB_FIBER:
801 case E1000_DEV_ID_82546EB_QUAD_COPPER:
802 return true;
803 default:
804 return false;
805 }
806}
807
808static netdev_features_t e1000_fix_features(struct net_device *netdev,
809 netdev_features_t features)
810{
811 /* Since there is no support for separate Rx/Tx vlan accel
812 * enable/disable make sure Tx flag is always in same state as Rx.
813 */
814 if (features & NETIF_F_HW_VLAN_CTAG_RX)
815 features |= NETIF_F_HW_VLAN_CTAG_TX;
816 else
817 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
818
819 return features;
820}
821
822static int e1000_set_features(struct net_device *netdev,
823 netdev_features_t features)
824{
825 struct e1000_adapter *adapter = netdev_priv(netdev);
826 netdev_features_t changed = features ^ netdev->features;
827
828 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
829 e1000_vlan_mode(netdev, features);
830
831 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL)))
832 return 0;
833
834 netdev->features = features;
835 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
836
837 if (netif_running(netdev))
838 e1000_reinit_locked(adapter);
839 else
840 e1000_reset(adapter);
841
842 return 0;
843}
844
845static const struct net_device_ops e1000_netdev_ops = {
846 .ndo_open = e1000_open,
847 .ndo_stop = e1000_close,
848 .ndo_start_xmit = e1000_xmit_frame,
849 .ndo_get_stats = e1000_get_stats,
850 .ndo_set_rx_mode = e1000_set_rx_mode,
851 .ndo_set_mac_address = e1000_set_mac,
852 .ndo_tx_timeout = e1000_tx_timeout,
853 .ndo_change_mtu = e1000_change_mtu,
854 .ndo_do_ioctl = e1000_ioctl,
855 .ndo_validate_addr = eth_validate_addr,
856 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
857 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
858#ifdef CONFIG_NET_POLL_CONTROLLER
859 .ndo_poll_controller = e1000_netpoll,
860#endif
861 .ndo_fix_features = e1000_fix_features,
862 .ndo_set_features = e1000_set_features,
863};
864
865/**
866 * e1000_init_hw_struct - initialize members of hw struct
867 * @adapter: board private struct
868 * @hw: structure used by e1000_hw.c
869 *
870 * Factors out initialization of the e1000_hw struct to its own function
871 * that can be called very early at init (just after struct allocation).
872 * Fields are initialized based on PCI device information and
873 * OS network device settings (MTU size).
874 * Returns negative error codes if MAC type setup fails.
875 */
876static int e1000_init_hw_struct(struct e1000_adapter *adapter,
877 struct e1000_hw *hw)
878{
879 struct pci_dev *pdev = adapter->pdev;
880
881 /* PCI config space info */
882 hw->vendor_id = pdev->vendor;
883 hw->device_id = pdev->device;
884 hw->subsystem_vendor_id = pdev->subsystem_vendor;
885 hw->subsystem_id = pdev->subsystem_device;
886 hw->revision_id = pdev->revision;
887
888 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
889
890 hw->max_frame_size = adapter->netdev->mtu +
891 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
892 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
893
894 /* identify the MAC */
895 if (e1000_set_mac_type(hw)) {
896 e_err(probe, "Unknown MAC Type\n");
897 return -EIO;
898 }
899
900 switch (hw->mac_type) {
901 default:
902 break;
903 case e1000_82541:
904 case e1000_82547:
905 case e1000_82541_rev_2:
906 case e1000_82547_rev_2:
907 hw->phy_init_script = 1;
908 break;
909 }
910
911 e1000_set_media_type(hw);
912 e1000_get_bus_info(hw);
913
914 hw->wait_autoneg_complete = false;
915 hw->tbi_compatibility_en = true;
916 hw->adaptive_ifs = true;
917
918 /* Copper options */
919
920 if (hw->media_type == e1000_media_type_copper) {
921 hw->mdix = AUTO_ALL_MODES;
922 hw->disable_polarity_correction = false;
923 hw->master_slave = E1000_MASTER_SLAVE;
924 }
925
926 return 0;
927}
928
929/**
930 * e1000_probe - Device Initialization Routine
931 * @pdev: PCI device information struct
932 * @ent: entry in e1000_pci_tbl
933 *
934 * Returns 0 on success, negative on failure
935 *
936 * e1000_probe initializes an adapter identified by a pci_dev structure.
937 * The OS initialization, configuring of the adapter private structure,
938 * and a hardware reset occur.
939 **/
940static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
941{
942 struct net_device *netdev;
943 struct e1000_adapter *adapter;
944 struct e1000_hw *hw;
945
946 static int cards_found;
947 static int global_quad_port_a; /* global ksp3 port a indication */
948 int i, err, pci_using_dac;
949 u16 eeprom_data = 0;
950 u16 tmp = 0;
951 u16 eeprom_apme_mask = E1000_EEPROM_APME;
952 int bars, need_ioport;
953
954 /* do not allocate ioport bars when not needed */
955 need_ioport = e1000_is_need_ioport(pdev);
956 if (need_ioport) {
957 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
958 err = pci_enable_device(pdev);
959 } else {
960 bars = pci_select_bars(pdev, IORESOURCE_MEM);
961 err = pci_enable_device_mem(pdev);
962 }
963 if (err)
964 return err;
965
966 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
967 if (err)
968 goto err_pci_reg;
969
970 pci_set_master(pdev);
971 err = pci_save_state(pdev);
972 if (err)
973 goto err_alloc_etherdev;
974
975 err = -ENOMEM;
976 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
977 if (!netdev)
978 goto err_alloc_etherdev;
979
980 SET_NETDEV_DEV(netdev, &pdev->dev);
981
982 pci_set_drvdata(pdev, netdev);
983 adapter = netdev_priv(netdev);
984 adapter->netdev = netdev;
985 adapter->pdev = pdev;
986 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
987 adapter->bars = bars;
988 adapter->need_ioport = need_ioport;
989
990 hw = &adapter->hw;
991 hw->back = adapter;
992
993 err = -EIO;
994 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
995 if (!hw->hw_addr)
996 goto err_ioremap;
997
998 if (adapter->need_ioport) {
999 for (i = BAR_1; i <= BAR_5; i++) {
1000 if (pci_resource_len(pdev, i) == 0)
1001 continue;
1002 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1003 hw->io_base = pci_resource_start(pdev, i);
1004 break;
1005 }
1006 }
1007 }
1008
1009 /* make ready for any if (hw->...) below */
1010 err = e1000_init_hw_struct(adapter, hw);
1011 if (err)
1012 goto err_sw_init;
1013
1014 /* there is a workaround being applied below that limits
1015 * 64-bit DMA addresses to 64-bit hardware. There are some
1016 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1017 */
1018 pci_using_dac = 0;
1019 if ((hw->bus_type == e1000_bus_type_pcix) &&
1020 !dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
1021 pci_using_dac = 1;
1022 } else {
1023 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1024 if (err) {
1025 pr_err("No usable DMA config, aborting\n");
1026 goto err_dma;
1027 }
1028 }
1029
1030 netdev->netdev_ops = &e1000_netdev_ops;
1031 e1000_set_ethtool_ops(netdev);
1032 netdev->watchdog_timeo = 5 * HZ;
1033 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1034
1035 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1036
1037 adapter->bd_number = cards_found;
1038
1039 /* setup the private structure */
1040
1041 err = e1000_sw_init(adapter);
1042 if (err)
1043 goto err_sw_init;
1044
1045 err = -EIO;
1046 if (hw->mac_type == e1000_ce4100) {
1047 hw->ce4100_gbe_mdio_base_virt =
1048 ioremap(pci_resource_start(pdev, BAR_1),
1049 pci_resource_len(pdev, BAR_1));
1050
1051 if (!hw->ce4100_gbe_mdio_base_virt)
1052 goto err_mdio_ioremap;
1053 }
1054
1055 if (hw->mac_type >= e1000_82543) {
1056 netdev->hw_features = NETIF_F_SG |
1057 NETIF_F_HW_CSUM |
1058 NETIF_F_HW_VLAN_CTAG_RX;
1059 netdev->features = NETIF_F_HW_VLAN_CTAG_TX |
1060 NETIF_F_HW_VLAN_CTAG_FILTER;
1061 }
1062
1063 if ((hw->mac_type >= e1000_82544) &&
1064 (hw->mac_type != e1000_82547))
1065 netdev->hw_features |= NETIF_F_TSO;
1066
1067 netdev->priv_flags |= IFF_SUPP_NOFCS;
1068
1069 netdev->features |= netdev->hw_features;
1070 netdev->hw_features |= (NETIF_F_RXCSUM |
1071 NETIF_F_RXALL |
1072 NETIF_F_RXFCS);
1073
1074 if (pci_using_dac) {
1075 netdev->features |= NETIF_F_HIGHDMA;
1076 netdev->vlan_features |= NETIF_F_HIGHDMA;
1077 }
1078
1079 netdev->vlan_features |= (NETIF_F_TSO |
1080 NETIF_F_HW_CSUM |
1081 NETIF_F_SG);
1082
1083 /* Do not set IFF_UNICAST_FLT for VMWare's 82545EM */
1084 if (hw->device_id != E1000_DEV_ID_82545EM_COPPER ||
1085 hw->subsystem_vendor_id != PCI_VENDOR_ID_VMWARE)
1086 netdev->priv_flags |= IFF_UNICAST_FLT;
1087
1088 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1089
1090 /* initialize eeprom parameters */
1091 if (e1000_init_eeprom_params(hw)) {
1092 e_err(probe, "EEPROM initialization failed\n");
1093 goto err_eeprom;
1094 }
1095
1096 /* before reading the EEPROM, reset the controller to
1097 * put the device in a known good starting state
1098 */
1099
1100 e1000_reset_hw(hw);
1101
1102 /* make sure the EEPROM is good */
1103 if (e1000_validate_eeprom_checksum(hw) < 0) {
1104 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1105 e1000_dump_eeprom(adapter);
1106 /* set MAC address to all zeroes to invalidate and temporary
1107 * disable this device for the user. This blocks regular
1108 * traffic while still permitting ethtool ioctls from reaching
1109 * the hardware as well as allowing the user to run the
1110 * interface after manually setting a hw addr using
1111 * `ip set address`
1112 */
1113 memset(hw->mac_addr, 0, netdev->addr_len);
1114 } else {
1115 /* copy the MAC address out of the EEPROM */
1116 if (e1000_read_mac_addr(hw))
1117 e_err(probe, "EEPROM Read Error\n");
1118 }
1119 /* don't block initialization here due to bad MAC address */
1120 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1121
1122 if (!is_valid_ether_addr(netdev->dev_addr))
1123 e_err(probe, "Invalid MAC Address\n");
1124
1125
1126 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1127 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1128 e1000_82547_tx_fifo_stall_task);
1129 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1130 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1131
1132 e1000_check_options(adapter);
1133
1134 /* Initial Wake on LAN setting
1135 * If APM wake is enabled in the EEPROM,
1136 * enable the ACPI Magic Packet filter
1137 */
1138
1139 switch (hw->mac_type) {
1140 case e1000_82542_rev2_0:
1141 case e1000_82542_rev2_1:
1142 case e1000_82543:
1143 break;
1144 case e1000_82544:
1145 e1000_read_eeprom(hw,
1146 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1147 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1148 break;
1149 case e1000_82546:
1150 case e1000_82546_rev_3:
1151 if (er32(STATUS) & E1000_STATUS_FUNC_1) {
1152 e1000_read_eeprom(hw,
1153 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1154 break;
1155 }
1156 /* Fall Through */
1157 default:
1158 e1000_read_eeprom(hw,
1159 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1160 break;
1161 }
1162 if (eeprom_data & eeprom_apme_mask)
1163 adapter->eeprom_wol |= E1000_WUFC_MAG;
1164
1165 /* now that we have the eeprom settings, apply the special cases
1166 * where the eeprom may be wrong or the board simply won't support
1167 * wake on lan on a particular port
1168 */
1169 switch (pdev->device) {
1170 case E1000_DEV_ID_82546GB_PCIE:
1171 adapter->eeprom_wol = 0;
1172 break;
1173 case E1000_DEV_ID_82546EB_FIBER:
1174 case E1000_DEV_ID_82546GB_FIBER:
1175 /* Wake events only supported on port A for dual fiber
1176 * regardless of eeprom setting
1177 */
1178 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1179 adapter->eeprom_wol = 0;
1180 break;
1181 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1182 /* if quad port adapter, disable WoL on all but port A */
1183 if (global_quad_port_a != 0)
1184 adapter->eeprom_wol = 0;
1185 else
1186 adapter->quad_port_a = true;
1187 /* Reset for multiple quad port adapters */
1188 if (++global_quad_port_a == 4)
1189 global_quad_port_a = 0;
1190 break;
1191 }
1192
1193 /* initialize the wol settings based on the eeprom settings */
1194 adapter->wol = adapter->eeprom_wol;
1195 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1196
1197 /* Auto detect PHY address */
1198 if (hw->mac_type == e1000_ce4100) {
1199 for (i = 0; i < 32; i++) {
1200 hw->phy_addr = i;
1201 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1202
1203 if (tmp != 0 && tmp != 0xFF)
1204 break;
1205 }
1206
1207 if (i >= 32)
1208 goto err_eeprom;
1209 }
1210
1211 /* reset the hardware with the new settings */
1212 e1000_reset(adapter);
1213
1214 strcpy(netdev->name, "eth%d");
1215 err = register_netdev(netdev);
1216 if (err)
1217 goto err_register;
1218
1219 e1000_vlan_filter_on_off(adapter, false);
1220
1221 /* print bus type/speed/width info */
1222 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1223 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1224 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1225 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1226 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1227 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1228 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1229 netdev->dev_addr);
1230
1231 /* carrier off reporting is important to ethtool even BEFORE open */
1232 netif_carrier_off(netdev);
1233
1234 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1235
1236 cards_found++;
1237 return 0;
1238
1239err_register:
1240err_eeprom:
1241 e1000_phy_hw_reset(hw);
1242
1243 if (hw->flash_address)
1244 iounmap(hw->flash_address);
1245 kfree(adapter->tx_ring);
1246 kfree(adapter->rx_ring);
1247err_dma:
1248err_sw_init:
1249err_mdio_ioremap:
1250 iounmap(hw->ce4100_gbe_mdio_base_virt);
1251 iounmap(hw->hw_addr);
1252err_ioremap:
1253 free_netdev(netdev);
1254err_alloc_etherdev:
1255 pci_release_selected_regions(pdev, bars);
1256err_pci_reg:
1257 pci_disable_device(pdev);
1258 return err;
1259}
1260
1261/**
1262 * e1000_remove - Device Removal Routine
1263 * @pdev: PCI device information struct
1264 *
1265 * e1000_remove is called by the PCI subsystem to alert the driver
1266 * that it should release a PCI device. That could be caused by a
1267 * Hot-Plug event, or because the driver is going to be removed from
1268 * memory.
1269 **/
1270static void e1000_remove(struct pci_dev *pdev)
1271{
1272 struct net_device *netdev = pci_get_drvdata(pdev);
1273 struct e1000_adapter *adapter = netdev_priv(netdev);
1274 struct e1000_hw *hw = &adapter->hw;
1275
1276 e1000_down_and_stop(adapter);
1277 e1000_release_manageability(adapter);
1278
1279 unregister_netdev(netdev);
1280
1281 e1000_phy_hw_reset(hw);
1282
1283 kfree(adapter->tx_ring);
1284 kfree(adapter->rx_ring);
1285
1286 if (hw->mac_type == e1000_ce4100)
1287 iounmap(hw->ce4100_gbe_mdio_base_virt);
1288 iounmap(hw->hw_addr);
1289 if (hw->flash_address)
1290 iounmap(hw->flash_address);
1291 pci_release_selected_regions(pdev, adapter->bars);
1292
1293 free_netdev(netdev);
1294
1295 pci_disable_device(pdev);
1296}
1297
1298/**
1299 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1300 * @adapter: board private structure to initialize
1301 *
1302 * e1000_sw_init initializes the Adapter private data structure.
1303 * e1000_init_hw_struct MUST be called before this function
1304 **/
1305static int e1000_sw_init(struct e1000_adapter *adapter)
1306{
1307 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1308
1309 adapter->num_tx_queues = 1;
1310 adapter->num_rx_queues = 1;
1311
1312 if (e1000_alloc_queues(adapter)) {
1313 e_err(probe, "Unable to allocate memory for queues\n");
1314 return -ENOMEM;
1315 }
1316
1317 /* Explicitly disable IRQ since the NIC can be in any state. */
1318 e1000_irq_disable(adapter);
1319
1320 spin_lock_init(&adapter->stats_lock);
1321
1322 set_bit(__E1000_DOWN, &adapter->flags);
1323
1324 return 0;
1325}
1326
1327/**
1328 * e1000_alloc_queues - Allocate memory for all rings
1329 * @adapter: board private structure to initialize
1330 *
1331 * We allocate one ring per queue at run-time since we don't know the
1332 * number of queues at compile-time.
1333 **/
1334static int e1000_alloc_queues(struct e1000_adapter *adapter)
1335{
1336 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1337 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1338 if (!adapter->tx_ring)
1339 return -ENOMEM;
1340
1341 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1342 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1343 if (!adapter->rx_ring) {
1344 kfree(adapter->tx_ring);
1345 return -ENOMEM;
1346 }
1347
1348 return E1000_SUCCESS;
1349}
1350
1351/**
1352 * e1000_open - Called when a network interface is made active
1353 * @netdev: network interface device structure
1354 *
1355 * Returns 0 on success, negative value on failure
1356 *
1357 * The open entry point is called when a network interface is made
1358 * active by the system (IFF_UP). At this point all resources needed
1359 * for transmit and receive operations are allocated, the interrupt
1360 * handler is registered with the OS, the watchdog task is started,
1361 * and the stack is notified that the interface is ready.
1362 **/
1363static int e1000_open(struct net_device *netdev)
1364{
1365 struct e1000_adapter *adapter = netdev_priv(netdev);
1366 struct e1000_hw *hw = &adapter->hw;
1367 int err;
1368
1369 /* disallow open during test */
1370 if (test_bit(__E1000_TESTING, &adapter->flags))
1371 return -EBUSY;
1372
1373 netif_carrier_off(netdev);
1374
1375 /* allocate transmit descriptors */
1376 err = e1000_setup_all_tx_resources(adapter);
1377 if (err)
1378 goto err_setup_tx;
1379
1380 /* allocate receive descriptors */
1381 err = e1000_setup_all_rx_resources(adapter);
1382 if (err)
1383 goto err_setup_rx;
1384
1385 e1000_power_up_phy(adapter);
1386
1387 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1388 if ((hw->mng_cookie.status &
1389 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1390 e1000_update_mng_vlan(adapter);
1391 }
1392
1393 /* before we allocate an interrupt, we must be ready to handle it.
1394 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1395 * as soon as we call pci_request_irq, so we have to setup our
1396 * clean_rx handler before we do so.
1397 */
1398 e1000_configure(adapter);
1399
1400 err = e1000_request_irq(adapter);
1401 if (err)
1402 goto err_req_irq;
1403
1404 /* From here on the code is the same as e1000_up() */
1405 clear_bit(__E1000_DOWN, &adapter->flags);
1406
1407 napi_enable(&adapter->napi);
1408
1409 e1000_irq_enable(adapter);
1410
1411 netif_start_queue(netdev);
1412
1413 /* fire a link status change interrupt to start the watchdog */
1414 ew32(ICS, E1000_ICS_LSC);
1415
1416 return E1000_SUCCESS;
1417
1418err_req_irq:
1419 e1000_power_down_phy(adapter);
1420 e1000_free_all_rx_resources(adapter);
1421err_setup_rx:
1422 e1000_free_all_tx_resources(adapter);
1423err_setup_tx:
1424 e1000_reset(adapter);
1425
1426 return err;
1427}
1428
1429/**
1430 * e1000_close - Disables a network interface
1431 * @netdev: network interface device structure
1432 *
1433 * Returns 0, this is not allowed to fail
1434 *
1435 * The close entry point is called when an interface is de-activated
1436 * by the OS. The hardware is still under the drivers control, but
1437 * needs to be disabled. A global MAC reset is issued to stop the
1438 * hardware, and all transmit and receive resources are freed.
1439 **/
1440static int e1000_close(struct net_device *netdev)
1441{
1442 struct e1000_adapter *adapter = netdev_priv(netdev);
1443 struct e1000_hw *hw = &adapter->hw;
1444 int count = E1000_CHECK_RESET_COUNT;
1445
1446 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
1447 usleep_range(10000, 20000);
1448
1449 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1450 e1000_down(adapter);
1451 e1000_power_down_phy(adapter);
1452 e1000_free_irq(adapter);
1453
1454 e1000_free_all_tx_resources(adapter);
1455 e1000_free_all_rx_resources(adapter);
1456
1457 /* kill manageability vlan ID if supported, but not if a vlan with
1458 * the same ID is registered on the host OS (let 8021q kill it)
1459 */
1460 if ((hw->mng_cookie.status &
1461 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1462 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1463 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
1464 adapter->mng_vlan_id);
1465 }
1466
1467 return 0;
1468}
1469
1470/**
1471 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1472 * @adapter: address of board private structure
1473 * @start: address of beginning of memory
1474 * @len: length of memory
1475 **/
1476static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1477 unsigned long len)
1478{
1479 struct e1000_hw *hw = &adapter->hw;
1480 unsigned long begin = (unsigned long)start;
1481 unsigned long end = begin + len;
1482
1483 /* First rev 82545 and 82546 need to not allow any memory
1484 * write location to cross 64k boundary due to errata 23
1485 */
1486 if (hw->mac_type == e1000_82545 ||
1487 hw->mac_type == e1000_ce4100 ||
1488 hw->mac_type == e1000_82546) {
1489 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1490 }
1491
1492 return true;
1493}
1494
1495/**
1496 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1497 * @adapter: board private structure
1498 * @txdr: tx descriptor ring (for a specific queue) to setup
1499 *
1500 * Return 0 on success, negative on failure
1501 **/
1502static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1503 struct e1000_tx_ring *txdr)
1504{
1505 struct pci_dev *pdev = adapter->pdev;
1506 int size;
1507
1508 size = sizeof(struct e1000_tx_buffer) * txdr->count;
1509 txdr->buffer_info = vzalloc(size);
1510 if (!txdr->buffer_info)
1511 return -ENOMEM;
1512
1513 /* round up to nearest 4K */
1514
1515 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1516 txdr->size = ALIGN(txdr->size, 4096);
1517
1518 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1519 GFP_KERNEL);
1520 if (!txdr->desc) {
1521setup_tx_desc_die:
1522 vfree(txdr->buffer_info);
1523 return -ENOMEM;
1524 }
1525
1526 /* Fix for errata 23, can't cross 64kB boundary */
1527 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1528 void *olddesc = txdr->desc;
1529 dma_addr_t olddma = txdr->dma;
1530 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1531 txdr->size, txdr->desc);
1532 /* Try again, without freeing the previous */
1533 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1534 &txdr->dma, GFP_KERNEL);
1535 /* Failed allocation, critical failure */
1536 if (!txdr->desc) {
1537 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1538 olddma);
1539 goto setup_tx_desc_die;
1540 }
1541
1542 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1543 /* give up */
1544 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1545 txdr->dma);
1546 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1547 olddma);
1548 e_err(probe, "Unable to allocate aligned memory "
1549 "for the transmit descriptor ring\n");
1550 vfree(txdr->buffer_info);
1551 return -ENOMEM;
1552 } else {
1553 /* Free old allocation, new allocation was successful */
1554 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1555 olddma);
1556 }
1557 }
1558 memset(txdr->desc, 0, txdr->size);
1559
1560 txdr->next_to_use = 0;
1561 txdr->next_to_clean = 0;
1562
1563 return 0;
1564}
1565
1566/**
1567 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1568 * (Descriptors) for all queues
1569 * @adapter: board private structure
1570 *
1571 * Return 0 on success, negative on failure
1572 **/
1573int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1574{
1575 int i, err = 0;
1576
1577 for (i = 0; i < adapter->num_tx_queues; i++) {
1578 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1579 if (err) {
1580 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1581 for (i-- ; i >= 0; i--)
1582 e1000_free_tx_resources(adapter,
1583 &adapter->tx_ring[i]);
1584 break;
1585 }
1586 }
1587
1588 return err;
1589}
1590
1591/**
1592 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1593 * @adapter: board private structure
1594 *
1595 * Configure the Tx unit of the MAC after a reset.
1596 **/
1597static void e1000_configure_tx(struct e1000_adapter *adapter)
1598{
1599 u64 tdba;
1600 struct e1000_hw *hw = &adapter->hw;
1601 u32 tdlen, tctl, tipg;
1602 u32 ipgr1, ipgr2;
1603
1604 /* Setup the HW Tx Head and Tail descriptor pointers */
1605
1606 switch (adapter->num_tx_queues) {
1607 case 1:
1608 default:
1609 tdba = adapter->tx_ring[0].dma;
1610 tdlen = adapter->tx_ring[0].count *
1611 sizeof(struct e1000_tx_desc);
1612 ew32(TDLEN, tdlen);
1613 ew32(TDBAH, (tdba >> 32));
1614 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1615 ew32(TDT, 0);
1616 ew32(TDH, 0);
1617 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ?
1618 E1000_TDH : E1000_82542_TDH);
1619 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ?
1620 E1000_TDT : E1000_82542_TDT);
1621 break;
1622 }
1623
1624 /* Set the default values for the Tx Inter Packet Gap timer */
1625 if ((hw->media_type == e1000_media_type_fiber ||
1626 hw->media_type == e1000_media_type_internal_serdes))
1627 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1628 else
1629 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1630
1631 switch (hw->mac_type) {
1632 case e1000_82542_rev2_0:
1633 case e1000_82542_rev2_1:
1634 tipg = DEFAULT_82542_TIPG_IPGT;
1635 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1636 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1637 break;
1638 default:
1639 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1640 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1641 break;
1642 }
1643 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1644 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1645 ew32(TIPG, tipg);
1646
1647 /* Set the Tx Interrupt Delay register */
1648
1649 ew32(TIDV, adapter->tx_int_delay);
1650 if (hw->mac_type >= e1000_82540)
1651 ew32(TADV, adapter->tx_abs_int_delay);
1652
1653 /* Program the Transmit Control Register */
1654
1655 tctl = er32(TCTL);
1656 tctl &= ~E1000_TCTL_CT;
1657 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1658 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1659
1660 e1000_config_collision_dist(hw);
1661
1662 /* Setup Transmit Descriptor Settings for eop descriptor */
1663 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1664
1665 /* only set IDE if we are delaying interrupts using the timers */
1666 if (adapter->tx_int_delay)
1667 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1668
1669 if (hw->mac_type < e1000_82543)
1670 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1671 else
1672 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1673
1674 /* Cache if we're 82544 running in PCI-X because we'll
1675 * need this to apply a workaround later in the send path.
1676 */
1677 if (hw->mac_type == e1000_82544 &&
1678 hw->bus_type == e1000_bus_type_pcix)
1679 adapter->pcix_82544 = true;
1680
1681 ew32(TCTL, tctl);
1682
1683}
1684
1685/**
1686 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1687 * @adapter: board private structure
1688 * @rxdr: rx descriptor ring (for a specific queue) to setup
1689 *
1690 * Returns 0 on success, negative on failure
1691 **/
1692static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1693 struct e1000_rx_ring *rxdr)
1694{
1695 struct pci_dev *pdev = adapter->pdev;
1696 int size, desc_len;
1697
1698 size = sizeof(struct e1000_rx_buffer) * rxdr->count;
1699 rxdr->buffer_info = vzalloc(size);
1700 if (!rxdr->buffer_info)
1701 return -ENOMEM;
1702
1703 desc_len = sizeof(struct e1000_rx_desc);
1704
1705 /* Round up to nearest 4K */
1706
1707 rxdr->size = rxdr->count * desc_len;
1708 rxdr->size = ALIGN(rxdr->size, 4096);
1709
1710 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1711 GFP_KERNEL);
1712 if (!rxdr->desc) {
1713setup_rx_desc_die:
1714 vfree(rxdr->buffer_info);
1715 return -ENOMEM;
1716 }
1717
1718 /* Fix for errata 23, can't cross 64kB boundary */
1719 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1720 void *olddesc = rxdr->desc;
1721 dma_addr_t olddma = rxdr->dma;
1722 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1723 rxdr->size, rxdr->desc);
1724 /* Try again, without freeing the previous */
1725 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1726 &rxdr->dma, GFP_KERNEL);
1727 /* Failed allocation, critical failure */
1728 if (!rxdr->desc) {
1729 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1730 olddma);
1731 goto setup_rx_desc_die;
1732 }
1733
1734 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1735 /* give up */
1736 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1737 rxdr->dma);
1738 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1739 olddma);
1740 e_err(probe, "Unable to allocate aligned memory for "
1741 "the Rx descriptor ring\n");
1742 goto setup_rx_desc_die;
1743 } else {
1744 /* Free old allocation, new allocation was successful */
1745 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1746 olddma);
1747 }
1748 }
1749 memset(rxdr->desc, 0, rxdr->size);
1750
1751 rxdr->next_to_clean = 0;
1752 rxdr->next_to_use = 0;
1753 rxdr->rx_skb_top = NULL;
1754
1755 return 0;
1756}
1757
1758/**
1759 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1760 * (Descriptors) for all queues
1761 * @adapter: board private structure
1762 *
1763 * Return 0 on success, negative on failure
1764 **/
1765int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1766{
1767 int i, err = 0;
1768
1769 for (i = 0; i < adapter->num_rx_queues; i++) {
1770 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1771 if (err) {
1772 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1773 for (i-- ; i >= 0; i--)
1774 e1000_free_rx_resources(adapter,
1775 &adapter->rx_ring[i]);
1776 break;
1777 }
1778 }
1779
1780 return err;
1781}
1782
1783/**
1784 * e1000_setup_rctl - configure the receive control registers
1785 * @adapter: Board private structure
1786 **/
1787static void e1000_setup_rctl(struct e1000_adapter *adapter)
1788{
1789 struct e1000_hw *hw = &adapter->hw;
1790 u32 rctl;
1791
1792 rctl = er32(RCTL);
1793
1794 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1795
1796 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1797 E1000_RCTL_RDMTS_HALF |
1798 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1799
1800 if (hw->tbi_compatibility_on == 1)
1801 rctl |= E1000_RCTL_SBP;
1802 else
1803 rctl &= ~E1000_RCTL_SBP;
1804
1805 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1806 rctl &= ~E1000_RCTL_LPE;
1807 else
1808 rctl |= E1000_RCTL_LPE;
1809
1810 /* Setup buffer sizes */
1811 rctl &= ~E1000_RCTL_SZ_4096;
1812 rctl |= E1000_RCTL_BSEX;
1813 switch (adapter->rx_buffer_len) {
1814 case E1000_RXBUFFER_2048:
1815 default:
1816 rctl |= E1000_RCTL_SZ_2048;
1817 rctl &= ~E1000_RCTL_BSEX;
1818 break;
1819 case E1000_RXBUFFER_4096:
1820 rctl |= E1000_RCTL_SZ_4096;
1821 break;
1822 case E1000_RXBUFFER_8192:
1823 rctl |= E1000_RCTL_SZ_8192;
1824 break;
1825 case E1000_RXBUFFER_16384:
1826 rctl |= E1000_RCTL_SZ_16384;
1827 break;
1828 }
1829
1830 /* This is useful for sniffing bad packets. */
1831 if (adapter->netdev->features & NETIF_F_RXALL) {
1832 /* UPE and MPE will be handled by normal PROMISC logic
1833 * in e1000e_set_rx_mode
1834 */
1835 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
1836 E1000_RCTL_BAM | /* RX All Bcast Pkts */
1837 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
1838
1839 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
1840 E1000_RCTL_DPF | /* Allow filtered pause */
1841 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
1842 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1843 * and that breaks VLANs.
1844 */
1845 }
1846
1847 ew32(RCTL, rctl);
1848}
1849
1850/**
1851 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1852 * @adapter: board private structure
1853 *
1854 * Configure the Rx unit of the MAC after a reset.
1855 **/
1856static void e1000_configure_rx(struct e1000_adapter *adapter)
1857{
1858 u64 rdba;
1859 struct e1000_hw *hw = &adapter->hw;
1860 u32 rdlen, rctl, rxcsum;
1861
1862 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1863 rdlen = adapter->rx_ring[0].count *
1864 sizeof(struct e1000_rx_desc);
1865 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1866 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1867 } else {
1868 rdlen = adapter->rx_ring[0].count *
1869 sizeof(struct e1000_rx_desc);
1870 adapter->clean_rx = e1000_clean_rx_irq;
1871 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1872 }
1873
1874 /* disable receives while setting up the descriptors */
1875 rctl = er32(RCTL);
1876 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1877
1878 /* set the Receive Delay Timer Register */
1879 ew32(RDTR, adapter->rx_int_delay);
1880
1881 if (hw->mac_type >= e1000_82540) {
1882 ew32(RADV, adapter->rx_abs_int_delay);
1883 if (adapter->itr_setting != 0)
1884 ew32(ITR, 1000000000 / (adapter->itr * 256));
1885 }
1886
1887 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1888 * the Base and Length of the Rx Descriptor Ring
1889 */
1890 switch (adapter->num_rx_queues) {
1891 case 1:
1892 default:
1893 rdba = adapter->rx_ring[0].dma;
1894 ew32(RDLEN, rdlen);
1895 ew32(RDBAH, (rdba >> 32));
1896 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1897 ew32(RDT, 0);
1898 ew32(RDH, 0);
1899 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ?
1900 E1000_RDH : E1000_82542_RDH);
1901 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ?
1902 E1000_RDT : E1000_82542_RDT);
1903 break;
1904 }
1905
1906 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1907 if (hw->mac_type >= e1000_82543) {
1908 rxcsum = er32(RXCSUM);
1909 if (adapter->rx_csum)
1910 rxcsum |= E1000_RXCSUM_TUOFL;
1911 else
1912 /* don't need to clear IPPCSE as it defaults to 0 */
1913 rxcsum &= ~E1000_RXCSUM_TUOFL;
1914 ew32(RXCSUM, rxcsum);
1915 }
1916
1917 /* Enable Receives */
1918 ew32(RCTL, rctl | E1000_RCTL_EN);
1919}
1920
1921/**
1922 * e1000_free_tx_resources - Free Tx Resources per Queue
1923 * @adapter: board private structure
1924 * @tx_ring: Tx descriptor ring for a specific queue
1925 *
1926 * Free all transmit software resources
1927 **/
1928static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1929 struct e1000_tx_ring *tx_ring)
1930{
1931 struct pci_dev *pdev = adapter->pdev;
1932
1933 e1000_clean_tx_ring(adapter, tx_ring);
1934
1935 vfree(tx_ring->buffer_info);
1936 tx_ring->buffer_info = NULL;
1937
1938 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1939 tx_ring->dma);
1940
1941 tx_ring->desc = NULL;
1942}
1943
1944/**
1945 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1946 * @adapter: board private structure
1947 *
1948 * Free all transmit software resources
1949 **/
1950void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1951{
1952 int i;
1953
1954 for (i = 0; i < adapter->num_tx_queues; i++)
1955 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1956}
1957
1958static void
1959e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1960 struct e1000_tx_buffer *buffer_info)
1961{
1962 if (buffer_info->dma) {
1963 if (buffer_info->mapped_as_page)
1964 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1965 buffer_info->length, DMA_TO_DEVICE);
1966 else
1967 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1968 buffer_info->length,
1969 DMA_TO_DEVICE);
1970 buffer_info->dma = 0;
1971 }
1972 if (buffer_info->skb) {
1973 dev_kfree_skb_any(buffer_info->skb);
1974 buffer_info->skb = NULL;
1975 }
1976 buffer_info->time_stamp = 0;
1977 /* buffer_info must be completely set up in the transmit path */
1978}
1979
1980/**
1981 * e1000_clean_tx_ring - Free Tx Buffers
1982 * @adapter: board private structure
1983 * @tx_ring: ring to be cleaned
1984 **/
1985static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1986 struct e1000_tx_ring *tx_ring)
1987{
1988 struct e1000_hw *hw = &adapter->hw;
1989 struct e1000_tx_buffer *buffer_info;
1990 unsigned long size;
1991 unsigned int i;
1992
1993 /* Free all the Tx ring sk_buffs */
1994
1995 for (i = 0; i < tx_ring->count; i++) {
1996 buffer_info = &tx_ring->buffer_info[i];
1997 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1998 }
1999
2000 netdev_reset_queue(adapter->netdev);
2001 size = sizeof(struct e1000_tx_buffer) * tx_ring->count;
2002 memset(tx_ring->buffer_info, 0, size);
2003
2004 /* Zero out the descriptor ring */
2005
2006 memset(tx_ring->desc, 0, tx_ring->size);
2007
2008 tx_ring->next_to_use = 0;
2009 tx_ring->next_to_clean = 0;
2010 tx_ring->last_tx_tso = false;
2011
2012 writel(0, hw->hw_addr + tx_ring->tdh);
2013 writel(0, hw->hw_addr + tx_ring->tdt);
2014}
2015
2016/**
2017 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2018 * @adapter: board private structure
2019 **/
2020static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2021{
2022 int i;
2023
2024 for (i = 0; i < adapter->num_tx_queues; i++)
2025 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2026}
2027
2028/**
2029 * e1000_free_rx_resources - Free Rx Resources
2030 * @adapter: board private structure
2031 * @rx_ring: ring to clean the resources from
2032 *
2033 * Free all receive software resources
2034 **/
2035static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2036 struct e1000_rx_ring *rx_ring)
2037{
2038 struct pci_dev *pdev = adapter->pdev;
2039
2040 e1000_clean_rx_ring(adapter, rx_ring);
2041
2042 vfree(rx_ring->buffer_info);
2043 rx_ring->buffer_info = NULL;
2044
2045 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2046 rx_ring->dma);
2047
2048 rx_ring->desc = NULL;
2049}
2050
2051/**
2052 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2053 * @adapter: board private structure
2054 *
2055 * Free all receive software resources
2056 **/
2057void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2058{
2059 int i;
2060
2061 for (i = 0; i < adapter->num_rx_queues; i++)
2062 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2063}
2064
2065#define E1000_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)
2066static unsigned int e1000_frag_len(const struct e1000_adapter *a)
2067{
2068 return SKB_DATA_ALIGN(a->rx_buffer_len + E1000_HEADROOM) +
2069 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
2070}
2071
2072static void *e1000_alloc_frag(const struct e1000_adapter *a)
2073{
2074 unsigned int len = e1000_frag_len(a);
2075 u8 *data = netdev_alloc_frag(len);
2076
2077 if (likely(data))
2078 data += E1000_HEADROOM;
2079 return data;
2080}
2081
2082/**
2083 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2084 * @adapter: board private structure
2085 * @rx_ring: ring to free buffers from
2086 **/
2087static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2088 struct e1000_rx_ring *rx_ring)
2089{
2090 struct e1000_hw *hw = &adapter->hw;
2091 struct e1000_rx_buffer *buffer_info;
2092 struct pci_dev *pdev = adapter->pdev;
2093 unsigned long size;
2094 unsigned int i;
2095
2096 /* Free all the Rx netfrags */
2097 for (i = 0; i < rx_ring->count; i++) {
2098 buffer_info = &rx_ring->buffer_info[i];
2099 if (adapter->clean_rx == e1000_clean_rx_irq) {
2100 if (buffer_info->dma)
2101 dma_unmap_single(&pdev->dev, buffer_info->dma,
2102 adapter->rx_buffer_len,
2103 DMA_FROM_DEVICE);
2104 if (buffer_info->rxbuf.data) {
2105 skb_free_frag(buffer_info->rxbuf.data);
2106 buffer_info->rxbuf.data = NULL;
2107 }
2108 } else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2109 if (buffer_info->dma)
2110 dma_unmap_page(&pdev->dev, buffer_info->dma,
2111 adapter->rx_buffer_len,
2112 DMA_FROM_DEVICE);
2113 if (buffer_info->rxbuf.page) {
2114 put_page(buffer_info->rxbuf.page);
2115 buffer_info->rxbuf.page = NULL;
2116 }
2117 }
2118
2119 buffer_info->dma = 0;
2120 }
2121
2122 /* there also may be some cached data from a chained receive */
2123 napi_free_frags(&adapter->napi);
2124 rx_ring->rx_skb_top = NULL;
2125
2126 size = sizeof(struct e1000_rx_buffer) * rx_ring->count;
2127 memset(rx_ring->buffer_info, 0, size);
2128
2129 /* Zero out the descriptor ring */
2130 memset(rx_ring->desc, 0, rx_ring->size);
2131
2132 rx_ring->next_to_clean = 0;
2133 rx_ring->next_to_use = 0;
2134
2135 writel(0, hw->hw_addr + rx_ring->rdh);
2136 writel(0, hw->hw_addr + rx_ring->rdt);
2137}
2138
2139/**
2140 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2141 * @adapter: board private structure
2142 **/
2143static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2144{
2145 int i;
2146
2147 for (i = 0; i < adapter->num_rx_queues; i++)
2148 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2149}
2150
2151/* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2152 * and memory write and invalidate disabled for certain operations
2153 */
2154static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2155{
2156 struct e1000_hw *hw = &adapter->hw;
2157 struct net_device *netdev = adapter->netdev;
2158 u32 rctl;
2159
2160 e1000_pci_clear_mwi(hw);
2161
2162 rctl = er32(RCTL);
2163 rctl |= E1000_RCTL_RST;
2164 ew32(RCTL, rctl);
2165 E1000_WRITE_FLUSH();
2166 mdelay(5);
2167
2168 if (netif_running(netdev))
2169 e1000_clean_all_rx_rings(adapter);
2170}
2171
2172static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2173{
2174 struct e1000_hw *hw = &adapter->hw;
2175 struct net_device *netdev = adapter->netdev;
2176 u32 rctl;
2177
2178 rctl = er32(RCTL);
2179 rctl &= ~E1000_RCTL_RST;
2180 ew32(RCTL, rctl);
2181 E1000_WRITE_FLUSH();
2182 mdelay(5);
2183
2184 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2185 e1000_pci_set_mwi(hw);
2186
2187 if (netif_running(netdev)) {
2188 /* No need to loop, because 82542 supports only 1 queue */
2189 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2190 e1000_configure_rx(adapter);
2191 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2192 }
2193}
2194
2195/**
2196 * e1000_set_mac - Change the Ethernet Address of the NIC
2197 * @netdev: network interface device structure
2198 * @p: pointer to an address structure
2199 *
2200 * Returns 0 on success, negative on failure
2201 **/
2202static int e1000_set_mac(struct net_device *netdev, void *p)
2203{
2204 struct e1000_adapter *adapter = netdev_priv(netdev);
2205 struct e1000_hw *hw = &adapter->hw;
2206 struct sockaddr *addr = p;
2207
2208 if (!is_valid_ether_addr(addr->sa_data))
2209 return -EADDRNOTAVAIL;
2210
2211 /* 82542 2.0 needs to be in reset to write receive address registers */
2212
2213 if (hw->mac_type == e1000_82542_rev2_0)
2214 e1000_enter_82542_rst(adapter);
2215
2216 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2217 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2218
2219 e1000_rar_set(hw, hw->mac_addr, 0);
2220
2221 if (hw->mac_type == e1000_82542_rev2_0)
2222 e1000_leave_82542_rst(adapter);
2223
2224 return 0;
2225}
2226
2227/**
2228 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2229 * @netdev: network interface device structure
2230 *
2231 * The set_rx_mode entry point is called whenever the unicast or multicast
2232 * address lists or the network interface flags are updated. This routine is
2233 * responsible for configuring the hardware for proper unicast, multicast,
2234 * promiscuous mode, and all-multi behavior.
2235 **/
2236static void e1000_set_rx_mode(struct net_device *netdev)
2237{
2238 struct e1000_adapter *adapter = netdev_priv(netdev);
2239 struct e1000_hw *hw = &adapter->hw;
2240 struct netdev_hw_addr *ha;
2241 bool use_uc = false;
2242 u32 rctl;
2243 u32 hash_value;
2244 int i, rar_entries = E1000_RAR_ENTRIES;
2245 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2246 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2247
2248 if (!mcarray)
2249 return;
2250
2251 /* Check for Promiscuous and All Multicast modes */
2252
2253 rctl = er32(RCTL);
2254
2255 if (netdev->flags & IFF_PROMISC) {
2256 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2257 rctl &= ~E1000_RCTL_VFE;
2258 } else {
2259 if (netdev->flags & IFF_ALLMULTI)
2260 rctl |= E1000_RCTL_MPE;
2261 else
2262 rctl &= ~E1000_RCTL_MPE;
2263 /* Enable VLAN filter if there is a VLAN */
2264 if (e1000_vlan_used(adapter))
2265 rctl |= E1000_RCTL_VFE;
2266 }
2267
2268 if (netdev_uc_count(netdev) > rar_entries - 1) {
2269 rctl |= E1000_RCTL_UPE;
2270 } else if (!(netdev->flags & IFF_PROMISC)) {
2271 rctl &= ~E1000_RCTL_UPE;
2272 use_uc = true;
2273 }
2274
2275 ew32(RCTL, rctl);
2276
2277 /* 82542 2.0 needs to be in reset to write receive address registers */
2278
2279 if (hw->mac_type == e1000_82542_rev2_0)
2280 e1000_enter_82542_rst(adapter);
2281
2282 /* load the first 14 addresses into the exact filters 1-14. Unicast
2283 * addresses take precedence to avoid disabling unicast filtering
2284 * when possible.
2285 *
2286 * RAR 0 is used for the station MAC address
2287 * if there are not 14 addresses, go ahead and clear the filters
2288 */
2289 i = 1;
2290 if (use_uc)
2291 netdev_for_each_uc_addr(ha, netdev) {
2292 if (i == rar_entries)
2293 break;
2294 e1000_rar_set(hw, ha->addr, i++);
2295 }
2296
2297 netdev_for_each_mc_addr(ha, netdev) {
2298 if (i == rar_entries) {
2299 /* load any remaining addresses into the hash table */
2300 u32 hash_reg, hash_bit, mta;
2301 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2302 hash_reg = (hash_value >> 5) & 0x7F;
2303 hash_bit = hash_value & 0x1F;
2304 mta = (1 << hash_bit);
2305 mcarray[hash_reg] |= mta;
2306 } else {
2307 e1000_rar_set(hw, ha->addr, i++);
2308 }
2309 }
2310
2311 for (; i < rar_entries; i++) {
2312 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2313 E1000_WRITE_FLUSH();
2314 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2315 E1000_WRITE_FLUSH();
2316 }
2317
2318 /* write the hash table completely, write from bottom to avoid
2319 * both stupid write combining chipsets, and flushing each write
2320 */
2321 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2322 /* If we are on an 82544 has an errata where writing odd
2323 * offsets overwrites the previous even offset, but writing
2324 * backwards over the range solves the issue by always
2325 * writing the odd offset first
2326 */
2327 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2328 }
2329 E1000_WRITE_FLUSH();
2330
2331 if (hw->mac_type == e1000_82542_rev2_0)
2332 e1000_leave_82542_rst(adapter);
2333
2334 kfree(mcarray);
2335}
2336
2337/**
2338 * e1000_update_phy_info_task - get phy info
2339 * @work: work struct contained inside adapter struct
2340 *
2341 * Need to wait a few seconds after link up to get diagnostic information from
2342 * the phy
2343 */
2344static void e1000_update_phy_info_task(struct work_struct *work)
2345{
2346 struct e1000_adapter *adapter = container_of(work,
2347 struct e1000_adapter,
2348 phy_info_task.work);
2349
2350 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2351}
2352
2353/**
2354 * e1000_82547_tx_fifo_stall_task - task to complete work
2355 * @work: work struct contained inside adapter struct
2356 **/
2357static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2358{
2359 struct e1000_adapter *adapter = container_of(work,
2360 struct e1000_adapter,
2361 fifo_stall_task.work);
2362 struct e1000_hw *hw = &adapter->hw;
2363 struct net_device *netdev = adapter->netdev;
2364 u32 tctl;
2365
2366 if (atomic_read(&adapter->tx_fifo_stall)) {
2367 if ((er32(TDT) == er32(TDH)) &&
2368 (er32(TDFT) == er32(TDFH)) &&
2369 (er32(TDFTS) == er32(TDFHS))) {
2370 tctl = er32(TCTL);
2371 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2372 ew32(TDFT, adapter->tx_head_addr);
2373 ew32(TDFH, adapter->tx_head_addr);
2374 ew32(TDFTS, adapter->tx_head_addr);
2375 ew32(TDFHS, adapter->tx_head_addr);
2376 ew32(TCTL, tctl);
2377 E1000_WRITE_FLUSH();
2378
2379 adapter->tx_fifo_head = 0;
2380 atomic_set(&adapter->tx_fifo_stall, 0);
2381 netif_wake_queue(netdev);
2382 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2383 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2384 }
2385 }
2386}
2387
2388bool e1000_has_link(struct e1000_adapter *adapter)
2389{
2390 struct e1000_hw *hw = &adapter->hw;
2391 bool link_active = false;
2392
2393 /* get_link_status is set on LSC (link status) interrupt or rx
2394 * sequence error interrupt (except on intel ce4100).
2395 * get_link_status will stay false until the
2396 * e1000_check_for_link establishes link for copper adapters
2397 * ONLY
2398 */
2399 switch (hw->media_type) {
2400 case e1000_media_type_copper:
2401 if (hw->mac_type == e1000_ce4100)
2402 hw->get_link_status = 1;
2403 if (hw->get_link_status) {
2404 e1000_check_for_link(hw);
2405 link_active = !hw->get_link_status;
2406 } else {
2407 link_active = true;
2408 }
2409 break;
2410 case e1000_media_type_fiber:
2411 e1000_check_for_link(hw);
2412 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2413 break;
2414 case e1000_media_type_internal_serdes:
2415 e1000_check_for_link(hw);
2416 link_active = hw->serdes_has_link;
2417 break;
2418 default:
2419 break;
2420 }
2421
2422 return link_active;
2423}
2424
2425/**
2426 * e1000_watchdog - work function
2427 * @work: work struct contained inside adapter struct
2428 **/
2429static void e1000_watchdog(struct work_struct *work)
2430{
2431 struct e1000_adapter *adapter = container_of(work,
2432 struct e1000_adapter,
2433 watchdog_task.work);
2434 struct e1000_hw *hw = &adapter->hw;
2435 struct net_device *netdev = adapter->netdev;
2436 struct e1000_tx_ring *txdr = adapter->tx_ring;
2437 u32 link, tctl;
2438
2439 link = e1000_has_link(adapter);
2440 if ((netif_carrier_ok(netdev)) && link)
2441 goto link_up;
2442
2443 if (link) {
2444 if (!netif_carrier_ok(netdev)) {
2445 u32 ctrl;
2446 bool txb2b = true;
2447 /* update snapshot of PHY registers on LSC */
2448 e1000_get_speed_and_duplex(hw,
2449 &adapter->link_speed,
2450 &adapter->link_duplex);
2451
2452 ctrl = er32(CTRL);
2453 pr_info("%s NIC Link is Up %d Mbps %s, "
2454 "Flow Control: %s\n",
2455 netdev->name,
2456 adapter->link_speed,
2457 adapter->link_duplex == FULL_DUPLEX ?
2458 "Full Duplex" : "Half Duplex",
2459 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2460 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2461 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2462 E1000_CTRL_TFCE) ? "TX" : "None")));
2463
2464 /* adjust timeout factor according to speed/duplex */
2465 adapter->tx_timeout_factor = 1;
2466 switch (adapter->link_speed) {
2467 case SPEED_10:
2468 txb2b = false;
2469 adapter->tx_timeout_factor = 16;
2470 break;
2471 case SPEED_100:
2472 txb2b = false;
2473 /* maybe add some timeout factor ? */
2474 break;
2475 }
2476
2477 /* enable transmits in the hardware */
2478 tctl = er32(TCTL);
2479 tctl |= E1000_TCTL_EN;
2480 ew32(TCTL, tctl);
2481
2482 netif_carrier_on(netdev);
2483 if (!test_bit(__E1000_DOWN, &adapter->flags))
2484 schedule_delayed_work(&adapter->phy_info_task,
2485 2 * HZ);
2486 adapter->smartspeed = 0;
2487 }
2488 } else {
2489 if (netif_carrier_ok(netdev)) {
2490 adapter->link_speed = 0;
2491 adapter->link_duplex = 0;
2492 pr_info("%s NIC Link is Down\n",
2493 netdev->name);
2494 netif_carrier_off(netdev);
2495
2496 if (!test_bit(__E1000_DOWN, &adapter->flags))
2497 schedule_delayed_work(&adapter->phy_info_task,
2498 2 * HZ);
2499 }
2500
2501 e1000_smartspeed(adapter);
2502 }
2503
2504link_up:
2505 e1000_update_stats(adapter);
2506
2507 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2508 adapter->tpt_old = adapter->stats.tpt;
2509 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2510 adapter->colc_old = adapter->stats.colc;
2511
2512 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2513 adapter->gorcl_old = adapter->stats.gorcl;
2514 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2515 adapter->gotcl_old = adapter->stats.gotcl;
2516
2517 e1000_update_adaptive(hw);
2518
2519 if (!netif_carrier_ok(netdev)) {
2520 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2521 /* We've lost link, so the controller stops DMA,
2522 * but we've got queued Tx work that's never going
2523 * to get done, so reset controller to flush Tx.
2524 * (Do the reset outside of interrupt context).
2525 */
2526 adapter->tx_timeout_count++;
2527 schedule_work(&adapter->reset_task);
2528 /* exit immediately since reset is imminent */
2529 return;
2530 }
2531 }
2532
2533 /* Simple mode for Interrupt Throttle Rate (ITR) */
2534 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2535 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2536 * Total asymmetrical Tx or Rx gets ITR=8000;
2537 * everyone else is between 2000-8000.
2538 */
2539 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2540 u32 dif = (adapter->gotcl > adapter->gorcl ?
2541 adapter->gotcl - adapter->gorcl :
2542 adapter->gorcl - adapter->gotcl) / 10000;
2543 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2544
2545 ew32(ITR, 1000000000 / (itr * 256));
2546 }
2547
2548 /* Cause software interrupt to ensure rx ring is cleaned */
2549 ew32(ICS, E1000_ICS_RXDMT0);
2550
2551 /* Force detection of hung controller every watchdog period */
2552 adapter->detect_tx_hung = true;
2553
2554 /* Reschedule the task */
2555 if (!test_bit(__E1000_DOWN, &adapter->flags))
2556 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2557}
2558
2559enum latency_range {
2560 lowest_latency = 0,
2561 low_latency = 1,
2562 bulk_latency = 2,
2563 latency_invalid = 255
2564};
2565
2566/**
2567 * e1000_update_itr - update the dynamic ITR value based on statistics
2568 * @adapter: pointer to adapter
2569 * @itr_setting: current adapter->itr
2570 * @packets: the number of packets during this measurement interval
2571 * @bytes: the number of bytes during this measurement interval
2572 *
2573 * Stores a new ITR value based on packets and byte
2574 * counts during the last interrupt. The advantage of per interrupt
2575 * computation is faster updates and more accurate ITR for the current
2576 * traffic pattern. Constants in this function were computed
2577 * based on theoretical maximum wire speed and thresholds were set based
2578 * on testing data as well as attempting to minimize response time
2579 * while increasing bulk throughput.
2580 * this functionality is controlled by the InterruptThrottleRate module
2581 * parameter (see e1000_param.c)
2582 **/
2583static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2584 u16 itr_setting, int packets, int bytes)
2585{
2586 unsigned int retval = itr_setting;
2587 struct e1000_hw *hw = &adapter->hw;
2588
2589 if (unlikely(hw->mac_type < e1000_82540))
2590 goto update_itr_done;
2591
2592 if (packets == 0)
2593 goto update_itr_done;
2594
2595 switch (itr_setting) {
2596 case lowest_latency:
2597 /* jumbo frames get bulk treatment*/
2598 if (bytes/packets > 8000)
2599 retval = bulk_latency;
2600 else if ((packets < 5) && (bytes > 512))
2601 retval = low_latency;
2602 break;
2603 case low_latency: /* 50 usec aka 20000 ints/s */
2604 if (bytes > 10000) {
2605 /* jumbo frames need bulk latency setting */
2606 if (bytes/packets > 8000)
2607 retval = bulk_latency;
2608 else if ((packets < 10) || ((bytes/packets) > 1200))
2609 retval = bulk_latency;
2610 else if ((packets > 35))
2611 retval = lowest_latency;
2612 } else if (bytes/packets > 2000)
2613 retval = bulk_latency;
2614 else if (packets <= 2 && bytes < 512)
2615 retval = lowest_latency;
2616 break;
2617 case bulk_latency: /* 250 usec aka 4000 ints/s */
2618 if (bytes > 25000) {
2619 if (packets > 35)
2620 retval = low_latency;
2621 } else if (bytes < 6000) {
2622 retval = low_latency;
2623 }
2624 break;
2625 }
2626
2627update_itr_done:
2628 return retval;
2629}
2630
2631static void e1000_set_itr(struct e1000_adapter *adapter)
2632{
2633 struct e1000_hw *hw = &adapter->hw;
2634 u16 current_itr;
2635 u32 new_itr = adapter->itr;
2636
2637 if (unlikely(hw->mac_type < e1000_82540))
2638 return;
2639
2640 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2641 if (unlikely(adapter->link_speed != SPEED_1000)) {
2642 current_itr = 0;
2643 new_itr = 4000;
2644 goto set_itr_now;
2645 }
2646
2647 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr,
2648 adapter->total_tx_packets,
2649 adapter->total_tx_bytes);
2650 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2651 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2652 adapter->tx_itr = low_latency;
2653
2654 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr,
2655 adapter->total_rx_packets,
2656 adapter->total_rx_bytes);
2657 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2658 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2659 adapter->rx_itr = low_latency;
2660
2661 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2662
2663 switch (current_itr) {
2664 /* counts and packets in update_itr are dependent on these numbers */
2665 case lowest_latency:
2666 new_itr = 70000;
2667 break;
2668 case low_latency:
2669 new_itr = 20000; /* aka hwitr = ~200 */
2670 break;
2671 case bulk_latency:
2672 new_itr = 4000;
2673 break;
2674 default:
2675 break;
2676 }
2677
2678set_itr_now:
2679 if (new_itr != adapter->itr) {
2680 /* this attempts to bias the interrupt rate towards Bulk
2681 * by adding intermediate steps when interrupt rate is
2682 * increasing
2683 */
2684 new_itr = new_itr > adapter->itr ?
2685 min(adapter->itr + (new_itr >> 2), new_itr) :
2686 new_itr;
2687 adapter->itr = new_itr;
2688 ew32(ITR, 1000000000 / (new_itr * 256));
2689 }
2690}
2691
2692#define E1000_TX_FLAGS_CSUM 0x00000001
2693#define E1000_TX_FLAGS_VLAN 0x00000002
2694#define E1000_TX_FLAGS_TSO 0x00000004
2695#define E1000_TX_FLAGS_IPV4 0x00000008
2696#define E1000_TX_FLAGS_NO_FCS 0x00000010
2697#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2698#define E1000_TX_FLAGS_VLAN_SHIFT 16
2699
2700static int e1000_tso(struct e1000_adapter *adapter,
2701 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2702 __be16 protocol)
2703{
2704 struct e1000_context_desc *context_desc;
2705 struct e1000_tx_buffer *buffer_info;
2706 unsigned int i;
2707 u32 cmd_length = 0;
2708 u16 ipcse = 0, tucse, mss;
2709 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2710
2711 if (skb_is_gso(skb)) {
2712 int err;
2713
2714 err = skb_cow_head(skb, 0);
2715 if (err < 0)
2716 return err;
2717
2718 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2719 mss = skb_shinfo(skb)->gso_size;
2720 if (protocol == htons(ETH_P_IP)) {
2721 struct iphdr *iph = ip_hdr(skb);
2722 iph->tot_len = 0;
2723 iph->check = 0;
2724 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2725 iph->daddr, 0,
2726 IPPROTO_TCP,
2727 0);
2728 cmd_length = E1000_TXD_CMD_IP;
2729 ipcse = skb_transport_offset(skb) - 1;
2730 } else if (skb_is_gso_v6(skb)) {
2731 ipv6_hdr(skb)->payload_len = 0;
2732 tcp_hdr(skb)->check =
2733 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2734 &ipv6_hdr(skb)->daddr,
2735 0, IPPROTO_TCP, 0);
2736 ipcse = 0;
2737 }
2738 ipcss = skb_network_offset(skb);
2739 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2740 tucss = skb_transport_offset(skb);
2741 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2742 tucse = 0;
2743
2744 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2745 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2746
2747 i = tx_ring->next_to_use;
2748 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2749 buffer_info = &tx_ring->buffer_info[i];
2750
2751 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2752 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2753 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2754 context_desc->upper_setup.tcp_fields.tucss = tucss;
2755 context_desc->upper_setup.tcp_fields.tucso = tucso;
2756 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2757 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2758 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2759 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2760
2761 buffer_info->time_stamp = jiffies;
2762 buffer_info->next_to_watch = i;
2763
2764 if (++i == tx_ring->count)
2765 i = 0;
2766
2767 tx_ring->next_to_use = i;
2768
2769 return true;
2770 }
2771 return false;
2772}
2773
2774static bool e1000_tx_csum(struct e1000_adapter *adapter,
2775 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2776 __be16 protocol)
2777{
2778 struct e1000_context_desc *context_desc;
2779 struct e1000_tx_buffer *buffer_info;
2780 unsigned int i;
2781 u8 css;
2782 u32 cmd_len = E1000_TXD_CMD_DEXT;
2783
2784 if (skb->ip_summed != CHECKSUM_PARTIAL)
2785 return false;
2786
2787 switch (protocol) {
2788 case cpu_to_be16(ETH_P_IP):
2789 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2790 cmd_len |= E1000_TXD_CMD_TCP;
2791 break;
2792 case cpu_to_be16(ETH_P_IPV6):
2793 /* XXX not handling all IPV6 headers */
2794 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2795 cmd_len |= E1000_TXD_CMD_TCP;
2796 break;
2797 default:
2798 if (unlikely(net_ratelimit()))
2799 e_warn(drv, "checksum_partial proto=%x!\n",
2800 skb->protocol);
2801 break;
2802 }
2803
2804 css = skb_checksum_start_offset(skb);
2805
2806 i = tx_ring->next_to_use;
2807 buffer_info = &tx_ring->buffer_info[i];
2808 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2809
2810 context_desc->lower_setup.ip_config = 0;
2811 context_desc->upper_setup.tcp_fields.tucss = css;
2812 context_desc->upper_setup.tcp_fields.tucso =
2813 css + skb->csum_offset;
2814 context_desc->upper_setup.tcp_fields.tucse = 0;
2815 context_desc->tcp_seg_setup.data = 0;
2816 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2817
2818 buffer_info->time_stamp = jiffies;
2819 buffer_info->next_to_watch = i;
2820
2821 if (unlikely(++i == tx_ring->count))
2822 i = 0;
2823
2824 tx_ring->next_to_use = i;
2825
2826 return true;
2827}
2828
2829#define E1000_MAX_TXD_PWR 12
2830#define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2831
2832static int e1000_tx_map(struct e1000_adapter *adapter,
2833 struct e1000_tx_ring *tx_ring,
2834 struct sk_buff *skb, unsigned int first,
2835 unsigned int max_per_txd, unsigned int nr_frags,
2836 unsigned int mss)
2837{
2838 struct e1000_hw *hw = &adapter->hw;
2839 struct pci_dev *pdev = adapter->pdev;
2840 struct e1000_tx_buffer *buffer_info;
2841 unsigned int len = skb_headlen(skb);
2842 unsigned int offset = 0, size, count = 0, i;
2843 unsigned int f, bytecount, segs;
2844
2845 i = tx_ring->next_to_use;
2846
2847 while (len) {
2848 buffer_info = &tx_ring->buffer_info[i];
2849 size = min(len, max_per_txd);
2850 /* Workaround for Controller erratum --
2851 * descriptor for non-tso packet in a linear SKB that follows a
2852 * tso gets written back prematurely before the data is fully
2853 * DMA'd to the controller
2854 */
2855 if (!skb->data_len && tx_ring->last_tx_tso &&
2856 !skb_is_gso(skb)) {
2857 tx_ring->last_tx_tso = false;
2858 size -= 4;
2859 }
2860
2861 /* Workaround for premature desc write-backs
2862 * in TSO mode. Append 4-byte sentinel desc
2863 */
2864 if (unlikely(mss && !nr_frags && size == len && size > 8))
2865 size -= 4;
2866 /* work-around for errata 10 and it applies
2867 * to all controllers in PCI-X mode
2868 * The fix is to make sure that the first descriptor of a
2869 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2870 */
2871 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2872 (size > 2015) && count == 0))
2873 size = 2015;
2874
2875 /* Workaround for potential 82544 hang in PCI-X. Avoid
2876 * terminating buffers within evenly-aligned dwords.
2877 */
2878 if (unlikely(adapter->pcix_82544 &&
2879 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2880 size > 4))
2881 size -= 4;
2882
2883 buffer_info->length = size;
2884 /* set time_stamp *before* dma to help avoid a possible race */
2885 buffer_info->time_stamp = jiffies;
2886 buffer_info->mapped_as_page = false;
2887 buffer_info->dma = dma_map_single(&pdev->dev,
2888 skb->data + offset,
2889 size, DMA_TO_DEVICE);
2890 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2891 goto dma_error;
2892 buffer_info->next_to_watch = i;
2893
2894 len -= size;
2895 offset += size;
2896 count++;
2897 if (len) {
2898 i++;
2899 if (unlikely(i == tx_ring->count))
2900 i = 0;
2901 }
2902 }
2903
2904 for (f = 0; f < nr_frags; f++) {
2905 const struct skb_frag_struct *frag;
2906
2907 frag = &skb_shinfo(skb)->frags[f];
2908 len = skb_frag_size(frag);
2909 offset = 0;
2910
2911 while (len) {
2912 unsigned long bufend;
2913 i++;
2914 if (unlikely(i == tx_ring->count))
2915 i = 0;
2916
2917 buffer_info = &tx_ring->buffer_info[i];
2918 size = min(len, max_per_txd);
2919 /* Workaround for premature desc write-backs
2920 * in TSO mode. Append 4-byte sentinel desc
2921 */
2922 if (unlikely(mss && f == (nr_frags-1) &&
2923 size == len && size > 8))
2924 size -= 4;
2925 /* Workaround for potential 82544 hang in PCI-X.
2926 * Avoid terminating buffers within evenly-aligned
2927 * dwords.
2928 */
2929 bufend = (unsigned long)
2930 page_to_phys(skb_frag_page(frag));
2931 bufend += offset + size - 1;
2932 if (unlikely(adapter->pcix_82544 &&
2933 !(bufend & 4) &&
2934 size > 4))
2935 size -= 4;
2936
2937 buffer_info->length = size;
2938 buffer_info->time_stamp = jiffies;
2939 buffer_info->mapped_as_page = true;
2940 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2941 offset, size, DMA_TO_DEVICE);
2942 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2943 goto dma_error;
2944 buffer_info->next_to_watch = i;
2945
2946 len -= size;
2947 offset += size;
2948 count++;
2949 }
2950 }
2951
2952 segs = skb_shinfo(skb)->gso_segs ?: 1;
2953 /* multiply data chunks by size of headers */
2954 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2955
2956 tx_ring->buffer_info[i].skb = skb;
2957 tx_ring->buffer_info[i].segs = segs;
2958 tx_ring->buffer_info[i].bytecount = bytecount;
2959 tx_ring->buffer_info[first].next_to_watch = i;
2960
2961 return count;
2962
2963dma_error:
2964 dev_err(&pdev->dev, "TX DMA map failed\n");
2965 buffer_info->dma = 0;
2966 if (count)
2967 count--;
2968
2969 while (count--) {
2970 if (i == 0)
2971 i += tx_ring->count;
2972 i--;
2973 buffer_info = &tx_ring->buffer_info[i];
2974 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2975 }
2976
2977 return 0;
2978}
2979
2980static void e1000_tx_queue(struct e1000_adapter *adapter,
2981 struct e1000_tx_ring *tx_ring, int tx_flags,
2982 int count)
2983{
2984 struct e1000_tx_desc *tx_desc = NULL;
2985 struct e1000_tx_buffer *buffer_info;
2986 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2987 unsigned int i;
2988
2989 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2990 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2991 E1000_TXD_CMD_TSE;
2992 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2993
2994 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2995 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2996 }
2997
2998 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2999 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3000 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3001 }
3002
3003 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3004 txd_lower |= E1000_TXD_CMD_VLE;
3005 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3006 }
3007
3008 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3009 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3010
3011 i = tx_ring->next_to_use;
3012
3013 while (count--) {
3014 buffer_info = &tx_ring->buffer_info[i];
3015 tx_desc = E1000_TX_DESC(*tx_ring, i);
3016 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3017 tx_desc->lower.data =
3018 cpu_to_le32(txd_lower | buffer_info->length);
3019 tx_desc->upper.data = cpu_to_le32(txd_upper);
3020 if (unlikely(++i == tx_ring->count))
3021 i = 0;
3022 }
3023
3024 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3025
3026 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3027 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3028 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3029
3030 /* Force memory writes to complete before letting h/w
3031 * know there are new descriptors to fetch. (Only
3032 * applicable for weak-ordered memory model archs,
3033 * such as IA-64).
3034 */
3035 wmb();
3036
3037 tx_ring->next_to_use = i;
3038}
3039
3040/* 82547 workaround to avoid controller hang in half-duplex environment.
3041 * The workaround is to avoid queuing a large packet that would span
3042 * the internal Tx FIFO ring boundary by notifying the stack to resend
3043 * the packet at a later time. This gives the Tx FIFO an opportunity to
3044 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3045 * to the beginning of the Tx FIFO.
3046 */
3047
3048#define E1000_FIFO_HDR 0x10
3049#define E1000_82547_PAD_LEN 0x3E0
3050
3051static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3052 struct sk_buff *skb)
3053{
3054 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3055 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3056
3057 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3058
3059 if (adapter->link_duplex != HALF_DUPLEX)
3060 goto no_fifo_stall_required;
3061
3062 if (atomic_read(&adapter->tx_fifo_stall))
3063 return 1;
3064
3065 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3066 atomic_set(&adapter->tx_fifo_stall, 1);
3067 return 1;
3068 }
3069
3070no_fifo_stall_required:
3071 adapter->tx_fifo_head += skb_fifo_len;
3072 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3073 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3074 return 0;
3075}
3076
3077static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3078{
3079 struct e1000_adapter *adapter = netdev_priv(netdev);
3080 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3081
3082 netif_stop_queue(netdev);
3083 /* Herbert's original patch had:
3084 * smp_mb__after_netif_stop_queue();
3085 * but since that doesn't exist yet, just open code it.
3086 */
3087 smp_mb();
3088
3089 /* We need to check again in a case another CPU has just
3090 * made room available.
3091 */
3092 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3093 return -EBUSY;
3094
3095 /* A reprieve! */
3096 netif_start_queue(netdev);
3097 ++adapter->restart_queue;
3098 return 0;
3099}
3100
3101static int e1000_maybe_stop_tx(struct net_device *netdev,
3102 struct e1000_tx_ring *tx_ring, int size)
3103{
3104 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3105 return 0;
3106 return __e1000_maybe_stop_tx(netdev, size);
3107}
3108
3109#define TXD_USE_COUNT(S, X) (((S) + ((1 << (X)) - 1)) >> (X))
3110static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3111 struct net_device *netdev)
3112{
3113 struct e1000_adapter *adapter = netdev_priv(netdev);
3114 struct e1000_hw *hw = &adapter->hw;
3115 struct e1000_tx_ring *tx_ring;
3116 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3117 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3118 unsigned int tx_flags = 0;
3119 unsigned int len = skb_headlen(skb);
3120 unsigned int nr_frags;
3121 unsigned int mss;
3122 int count = 0;
3123 int tso;
3124 unsigned int f;
3125 __be16 protocol = vlan_get_protocol(skb);
3126
3127 /* This goes back to the question of how to logically map a Tx queue
3128 * to a flow. Right now, performance is impacted slightly negatively
3129 * if using multiple Tx queues. If the stack breaks away from a
3130 * single qdisc implementation, we can look at this again.
3131 */
3132 tx_ring = adapter->tx_ring;
3133
3134 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3135 * packets may get corrupted during padding by HW.
3136 * To WA this issue, pad all small packets manually.
3137 */
3138 if (eth_skb_pad(skb))
3139 return NETDEV_TX_OK;
3140
3141 mss = skb_shinfo(skb)->gso_size;
3142 /* The controller does a simple calculation to
3143 * make sure there is enough room in the FIFO before
3144 * initiating the DMA for each buffer. The calc is:
3145 * 4 = ceil(buffer len/mss). To make sure we don't
3146 * overrun the FIFO, adjust the max buffer len if mss
3147 * drops.
3148 */
3149 if (mss) {
3150 u8 hdr_len;
3151 max_per_txd = min(mss << 2, max_per_txd);
3152 max_txd_pwr = fls(max_per_txd) - 1;
3153
3154 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3155 if (skb->data_len && hdr_len == len) {
3156 switch (hw->mac_type) {
3157 unsigned int pull_size;
3158 case e1000_82544:
3159 /* Make sure we have room to chop off 4 bytes,
3160 * and that the end alignment will work out to
3161 * this hardware's requirements
3162 * NOTE: this is a TSO only workaround
3163 * if end byte alignment not correct move us
3164 * into the next dword
3165 */
3166 if ((unsigned long)(skb_tail_pointer(skb) - 1)
3167 & 4)
3168 break;
3169 /* fall through */
3170 pull_size = min((unsigned int)4, skb->data_len);
3171 if (!__pskb_pull_tail(skb, pull_size)) {
3172 e_err(drv, "__pskb_pull_tail "
3173 "failed.\n");
3174 dev_kfree_skb_any(skb);
3175 return NETDEV_TX_OK;
3176 }
3177 len = skb_headlen(skb);
3178 break;
3179 default:
3180 /* do nothing */
3181 break;
3182 }
3183 }
3184 }
3185
3186 /* reserve a descriptor for the offload context */
3187 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3188 count++;
3189 count++;
3190
3191 /* Controller Erratum workaround */
3192 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3193 count++;
3194
3195 count += TXD_USE_COUNT(len, max_txd_pwr);
3196
3197 if (adapter->pcix_82544)
3198 count++;
3199
3200 /* work-around for errata 10 and it applies to all controllers
3201 * in PCI-X mode, so add one more descriptor to the count
3202 */
3203 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3204 (len > 2015)))
3205 count++;
3206
3207 nr_frags = skb_shinfo(skb)->nr_frags;
3208 for (f = 0; f < nr_frags; f++)
3209 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3210 max_txd_pwr);
3211 if (adapter->pcix_82544)
3212 count += nr_frags;
3213
3214 /* need: count + 2 desc gap to keep tail from touching
3215 * head, otherwise try next time
3216 */
3217 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3218 return NETDEV_TX_BUSY;
3219
3220 if (unlikely((hw->mac_type == e1000_82547) &&
3221 (e1000_82547_fifo_workaround(adapter, skb)))) {
3222 netif_stop_queue(netdev);
3223 if (!test_bit(__E1000_DOWN, &adapter->flags))
3224 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3225 return NETDEV_TX_BUSY;
3226 }
3227
3228 if (skb_vlan_tag_present(skb)) {
3229 tx_flags |= E1000_TX_FLAGS_VLAN;
3230 tx_flags |= (skb_vlan_tag_get(skb) <<
3231 E1000_TX_FLAGS_VLAN_SHIFT);
3232 }
3233
3234 first = tx_ring->next_to_use;
3235
3236 tso = e1000_tso(adapter, tx_ring, skb, protocol);
3237 if (tso < 0) {
3238 dev_kfree_skb_any(skb);
3239 return NETDEV_TX_OK;
3240 }
3241
3242 if (likely(tso)) {
3243 if (likely(hw->mac_type != e1000_82544))
3244 tx_ring->last_tx_tso = true;
3245 tx_flags |= E1000_TX_FLAGS_TSO;
3246 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb, protocol)))
3247 tx_flags |= E1000_TX_FLAGS_CSUM;
3248
3249 if (protocol == htons(ETH_P_IP))
3250 tx_flags |= E1000_TX_FLAGS_IPV4;
3251
3252 if (unlikely(skb->no_fcs))
3253 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3254
3255 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3256 nr_frags, mss);
3257
3258 if (count) {
3259 /* The descriptors needed is higher than other Intel drivers
3260 * due to a number of workarounds. The breakdown is below:
3261 * Data descriptors: MAX_SKB_FRAGS + 1
3262 * Context Descriptor: 1
3263 * Keep head from touching tail: 2
3264 * Workarounds: 3
3265 */
3266 int desc_needed = MAX_SKB_FRAGS + 7;
3267
3268 netdev_sent_queue(netdev, skb->len);
3269 skb_tx_timestamp(skb);
3270
3271 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3272
3273 /* 82544 potentially requires twice as many data descriptors
3274 * in order to guarantee buffers don't end on evenly-aligned
3275 * dwords
3276 */
3277 if (adapter->pcix_82544)
3278 desc_needed += MAX_SKB_FRAGS + 1;
3279
3280 /* Make sure there is space in the ring for the next send. */
3281 e1000_maybe_stop_tx(netdev, tx_ring, desc_needed);
3282
3283 if (!skb->xmit_more ||
3284 netif_xmit_stopped(netdev_get_tx_queue(netdev, 0))) {
3285 writel(tx_ring->next_to_use, hw->hw_addr + tx_ring->tdt);
3286 /* we need this if more than one processor can write to
3287 * our tail at a time, it synchronizes IO on IA64/Altix
3288 * systems
3289 */
3290 mmiowb();
3291 }
3292 } else {
3293 dev_kfree_skb_any(skb);
3294 tx_ring->buffer_info[first].time_stamp = 0;
3295 tx_ring->next_to_use = first;
3296 }
3297
3298 return NETDEV_TX_OK;
3299}
3300
3301#define NUM_REGS 38 /* 1 based count */
3302static void e1000_regdump(struct e1000_adapter *adapter)
3303{
3304 struct e1000_hw *hw = &adapter->hw;
3305 u32 regs[NUM_REGS];
3306 u32 *regs_buff = regs;
3307 int i = 0;
3308
3309 static const char * const reg_name[] = {
3310 "CTRL", "STATUS",
3311 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3312 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3313 "TIDV", "TXDCTL", "TADV", "TARC0",
3314 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3315 "TXDCTL1", "TARC1",
3316 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3317 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3318 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3319 };
3320
3321 regs_buff[0] = er32(CTRL);
3322 regs_buff[1] = er32(STATUS);
3323
3324 regs_buff[2] = er32(RCTL);
3325 regs_buff[3] = er32(RDLEN);
3326 regs_buff[4] = er32(RDH);
3327 regs_buff[5] = er32(RDT);
3328 regs_buff[6] = er32(RDTR);
3329
3330 regs_buff[7] = er32(TCTL);
3331 regs_buff[8] = er32(TDBAL);
3332 regs_buff[9] = er32(TDBAH);
3333 regs_buff[10] = er32(TDLEN);
3334 regs_buff[11] = er32(TDH);
3335 regs_buff[12] = er32(TDT);
3336 regs_buff[13] = er32(TIDV);
3337 regs_buff[14] = er32(TXDCTL);
3338 regs_buff[15] = er32(TADV);
3339 regs_buff[16] = er32(TARC0);
3340
3341 regs_buff[17] = er32(TDBAL1);
3342 regs_buff[18] = er32(TDBAH1);
3343 regs_buff[19] = er32(TDLEN1);
3344 regs_buff[20] = er32(TDH1);
3345 regs_buff[21] = er32(TDT1);
3346 regs_buff[22] = er32(TXDCTL1);
3347 regs_buff[23] = er32(TARC1);
3348 regs_buff[24] = er32(CTRL_EXT);
3349 regs_buff[25] = er32(ERT);
3350 regs_buff[26] = er32(RDBAL0);
3351 regs_buff[27] = er32(RDBAH0);
3352 regs_buff[28] = er32(TDFH);
3353 regs_buff[29] = er32(TDFT);
3354 regs_buff[30] = er32(TDFHS);
3355 regs_buff[31] = er32(TDFTS);
3356 regs_buff[32] = er32(TDFPC);
3357 regs_buff[33] = er32(RDFH);
3358 regs_buff[34] = er32(RDFT);
3359 regs_buff[35] = er32(RDFHS);
3360 regs_buff[36] = er32(RDFTS);
3361 regs_buff[37] = er32(RDFPC);
3362
3363 pr_info("Register dump\n");
3364 for (i = 0; i < NUM_REGS; i++)
3365 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3366}
3367
3368/*
3369 * e1000_dump: Print registers, tx ring and rx ring
3370 */
3371static void e1000_dump(struct e1000_adapter *adapter)
3372{
3373 /* this code doesn't handle multiple rings */
3374 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3375 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3376 int i;
3377
3378 if (!netif_msg_hw(adapter))
3379 return;
3380
3381 /* Print Registers */
3382 e1000_regdump(adapter);
3383
3384 /* transmit dump */
3385 pr_info("TX Desc ring0 dump\n");
3386
3387 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3388 *
3389 * Legacy Transmit Descriptor
3390 * +--------------------------------------------------------------+
3391 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3392 * +--------------------------------------------------------------+
3393 * 8 | Special | CSS | Status | CMD | CSO | Length |
3394 * +--------------------------------------------------------------+
3395 * 63 48 47 36 35 32 31 24 23 16 15 0
3396 *
3397 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3398 * 63 48 47 40 39 32 31 16 15 8 7 0
3399 * +----------------------------------------------------------------+
3400 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3401 * +----------------------------------------------------------------+
3402 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3403 * +----------------------------------------------------------------+
3404 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3405 *
3406 * Extended Data Descriptor (DTYP=0x1)
3407 * +----------------------------------------------------------------+
3408 * 0 | Buffer Address [63:0] |
3409 * +----------------------------------------------------------------+
3410 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3411 * +----------------------------------------------------------------+
3412 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3413 */
3414 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3415 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3416
3417 if (!netif_msg_tx_done(adapter))
3418 goto rx_ring_summary;
3419
3420 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3421 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3422 struct e1000_tx_buffer *buffer_info = &tx_ring->buffer_info[i];
3423 struct my_u { __le64 a; __le64 b; };
3424 struct my_u *u = (struct my_u *)tx_desc;
3425 const char *type;
3426
3427 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3428 type = "NTC/U";
3429 else if (i == tx_ring->next_to_use)
3430 type = "NTU";
3431 else if (i == tx_ring->next_to_clean)
3432 type = "NTC";
3433 else
3434 type = "";
3435
3436 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3437 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3438 le64_to_cpu(u->a), le64_to_cpu(u->b),
3439 (u64)buffer_info->dma, buffer_info->length,
3440 buffer_info->next_to_watch,
3441 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3442 }
3443
3444rx_ring_summary:
3445 /* receive dump */
3446 pr_info("\nRX Desc ring dump\n");
3447
3448 /* Legacy Receive Descriptor Format
3449 *
3450 * +-----------------------------------------------------+
3451 * | Buffer Address [63:0] |
3452 * +-----------------------------------------------------+
3453 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3454 * +-----------------------------------------------------+
3455 * 63 48 47 40 39 32 31 16 15 0
3456 */
3457 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3458
3459 if (!netif_msg_rx_status(adapter))
3460 goto exit;
3461
3462 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3463 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3464 struct e1000_rx_buffer *buffer_info = &rx_ring->buffer_info[i];
3465 struct my_u { __le64 a; __le64 b; };
3466 struct my_u *u = (struct my_u *)rx_desc;
3467 const char *type;
3468
3469 if (i == rx_ring->next_to_use)
3470 type = "NTU";
3471 else if (i == rx_ring->next_to_clean)
3472 type = "NTC";
3473 else
3474 type = "";
3475
3476 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3477 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3478 (u64)buffer_info->dma, buffer_info->rxbuf.data, type);
3479 } /* for */
3480
3481 /* dump the descriptor caches */
3482 /* rx */
3483 pr_info("Rx descriptor cache in 64bit format\n");
3484 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3485 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3486 i,
3487 readl(adapter->hw.hw_addr + i+4),
3488 readl(adapter->hw.hw_addr + i),
3489 readl(adapter->hw.hw_addr + i+12),
3490 readl(adapter->hw.hw_addr + i+8));
3491 }
3492 /* tx */
3493 pr_info("Tx descriptor cache in 64bit format\n");
3494 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3495 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3496 i,
3497 readl(adapter->hw.hw_addr + i+4),
3498 readl(adapter->hw.hw_addr + i),
3499 readl(adapter->hw.hw_addr + i+12),
3500 readl(adapter->hw.hw_addr + i+8));
3501 }
3502exit:
3503 return;
3504}
3505
3506/**
3507 * e1000_tx_timeout - Respond to a Tx Hang
3508 * @netdev: network interface device structure
3509 **/
3510static void e1000_tx_timeout(struct net_device *netdev)
3511{
3512 struct e1000_adapter *adapter = netdev_priv(netdev);
3513
3514 /* Do the reset outside of interrupt context */
3515 adapter->tx_timeout_count++;
3516 schedule_work(&adapter->reset_task);
3517}
3518
3519static void e1000_reset_task(struct work_struct *work)
3520{
3521 struct e1000_adapter *adapter =
3522 container_of(work, struct e1000_adapter, reset_task);
3523
3524 e_err(drv, "Reset adapter\n");
3525 e1000_reinit_locked(adapter);
3526}
3527
3528/**
3529 * e1000_get_stats - Get System Network Statistics
3530 * @netdev: network interface device structure
3531 *
3532 * Returns the address of the device statistics structure.
3533 * The statistics are actually updated from the watchdog.
3534 **/
3535static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3536{
3537 /* only return the current stats */
3538 return &netdev->stats;
3539}
3540
3541/**
3542 * e1000_change_mtu - Change the Maximum Transfer Unit
3543 * @netdev: network interface device structure
3544 * @new_mtu: new value for maximum frame size
3545 *
3546 * Returns 0 on success, negative on failure
3547 **/
3548static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3549{
3550 struct e1000_adapter *adapter = netdev_priv(netdev);
3551 struct e1000_hw *hw = &adapter->hw;
3552 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3553
3554 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3555 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3556 e_err(probe, "Invalid MTU setting\n");
3557 return -EINVAL;
3558 }
3559
3560 /* Adapter-specific max frame size limits. */
3561 switch (hw->mac_type) {
3562 case e1000_undefined ... e1000_82542_rev2_1:
3563 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3564 e_err(probe, "Jumbo Frames not supported.\n");
3565 return -EINVAL;
3566 }
3567 break;
3568 default:
3569 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3570 break;
3571 }
3572
3573 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3574 msleep(1);
3575 /* e1000_down has a dependency on max_frame_size */
3576 hw->max_frame_size = max_frame;
3577 if (netif_running(netdev)) {
3578 /* prevent buffers from being reallocated */
3579 adapter->alloc_rx_buf = e1000_alloc_dummy_rx_buffers;
3580 e1000_down(adapter);
3581 }
3582
3583 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3584 * means we reserve 2 more, this pushes us to allocate from the next
3585 * larger slab size.
3586 * i.e. RXBUFFER_2048 --> size-4096 slab
3587 * however with the new *_jumbo_rx* routines, jumbo receives will use
3588 * fragmented skbs
3589 */
3590
3591 if (max_frame <= E1000_RXBUFFER_2048)
3592 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3593 else
3594#if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3595 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3596#elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3597 adapter->rx_buffer_len = PAGE_SIZE;
3598#endif
3599
3600 /* adjust allocation if LPE protects us, and we aren't using SBP */
3601 if (!hw->tbi_compatibility_on &&
3602 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3603 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3604 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3605
3606 pr_info("%s changing MTU from %d to %d\n",
3607 netdev->name, netdev->mtu, new_mtu);
3608 netdev->mtu = new_mtu;
3609
3610 if (netif_running(netdev))
3611 e1000_up(adapter);
3612 else
3613 e1000_reset(adapter);
3614
3615 clear_bit(__E1000_RESETTING, &adapter->flags);
3616
3617 return 0;
3618}
3619
3620/**
3621 * e1000_update_stats - Update the board statistics counters
3622 * @adapter: board private structure
3623 **/
3624void e1000_update_stats(struct e1000_adapter *adapter)
3625{
3626 struct net_device *netdev = adapter->netdev;
3627 struct e1000_hw *hw = &adapter->hw;
3628 struct pci_dev *pdev = adapter->pdev;
3629 unsigned long flags;
3630 u16 phy_tmp;
3631
3632#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3633
3634 /* Prevent stats update while adapter is being reset, or if the pci
3635 * connection is down.
3636 */
3637 if (adapter->link_speed == 0)
3638 return;
3639 if (pci_channel_offline(pdev))
3640 return;
3641
3642 spin_lock_irqsave(&adapter->stats_lock, flags);
3643
3644 /* these counters are modified from e1000_tbi_adjust_stats,
3645 * called from the interrupt context, so they must only
3646 * be written while holding adapter->stats_lock
3647 */
3648
3649 adapter->stats.crcerrs += er32(CRCERRS);
3650 adapter->stats.gprc += er32(GPRC);
3651 adapter->stats.gorcl += er32(GORCL);
3652 adapter->stats.gorch += er32(GORCH);
3653 adapter->stats.bprc += er32(BPRC);
3654 adapter->stats.mprc += er32(MPRC);
3655 adapter->stats.roc += er32(ROC);
3656
3657 adapter->stats.prc64 += er32(PRC64);
3658 adapter->stats.prc127 += er32(PRC127);
3659 adapter->stats.prc255 += er32(PRC255);
3660 adapter->stats.prc511 += er32(PRC511);
3661 adapter->stats.prc1023 += er32(PRC1023);
3662 adapter->stats.prc1522 += er32(PRC1522);
3663
3664 adapter->stats.symerrs += er32(SYMERRS);
3665 adapter->stats.mpc += er32(MPC);
3666 adapter->stats.scc += er32(SCC);
3667 adapter->stats.ecol += er32(ECOL);
3668 adapter->stats.mcc += er32(MCC);
3669 adapter->stats.latecol += er32(LATECOL);
3670 adapter->stats.dc += er32(DC);
3671 adapter->stats.sec += er32(SEC);
3672 adapter->stats.rlec += er32(RLEC);
3673 adapter->stats.xonrxc += er32(XONRXC);
3674 adapter->stats.xontxc += er32(XONTXC);
3675 adapter->stats.xoffrxc += er32(XOFFRXC);
3676 adapter->stats.xofftxc += er32(XOFFTXC);
3677 adapter->stats.fcruc += er32(FCRUC);
3678 adapter->stats.gptc += er32(GPTC);
3679 adapter->stats.gotcl += er32(GOTCL);
3680 adapter->stats.gotch += er32(GOTCH);
3681 adapter->stats.rnbc += er32(RNBC);
3682 adapter->stats.ruc += er32(RUC);
3683 adapter->stats.rfc += er32(RFC);
3684 adapter->stats.rjc += er32(RJC);
3685 adapter->stats.torl += er32(TORL);
3686 adapter->stats.torh += er32(TORH);
3687 adapter->stats.totl += er32(TOTL);
3688 adapter->stats.toth += er32(TOTH);
3689 adapter->stats.tpr += er32(TPR);
3690
3691 adapter->stats.ptc64 += er32(PTC64);
3692 adapter->stats.ptc127 += er32(PTC127);
3693 adapter->stats.ptc255 += er32(PTC255);
3694 adapter->stats.ptc511 += er32(PTC511);
3695 adapter->stats.ptc1023 += er32(PTC1023);
3696 adapter->stats.ptc1522 += er32(PTC1522);
3697
3698 adapter->stats.mptc += er32(MPTC);
3699 adapter->stats.bptc += er32(BPTC);
3700
3701 /* used for adaptive IFS */
3702
3703 hw->tx_packet_delta = er32(TPT);
3704 adapter->stats.tpt += hw->tx_packet_delta;
3705 hw->collision_delta = er32(COLC);
3706 adapter->stats.colc += hw->collision_delta;
3707
3708 if (hw->mac_type >= e1000_82543) {
3709 adapter->stats.algnerrc += er32(ALGNERRC);
3710 adapter->stats.rxerrc += er32(RXERRC);
3711 adapter->stats.tncrs += er32(TNCRS);
3712 adapter->stats.cexterr += er32(CEXTERR);
3713 adapter->stats.tsctc += er32(TSCTC);
3714 adapter->stats.tsctfc += er32(TSCTFC);
3715 }
3716
3717 /* Fill out the OS statistics structure */
3718 netdev->stats.multicast = adapter->stats.mprc;
3719 netdev->stats.collisions = adapter->stats.colc;
3720
3721 /* Rx Errors */
3722
3723 /* RLEC on some newer hardware can be incorrect so build
3724 * our own version based on RUC and ROC
3725 */
3726 netdev->stats.rx_errors = adapter->stats.rxerrc +
3727 adapter->stats.crcerrs + adapter->stats.algnerrc +
3728 adapter->stats.ruc + adapter->stats.roc +
3729 adapter->stats.cexterr;
3730 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3731 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3732 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3733 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3734 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3735
3736 /* Tx Errors */
3737 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3738 netdev->stats.tx_errors = adapter->stats.txerrc;
3739 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3740 netdev->stats.tx_window_errors = adapter->stats.latecol;
3741 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3742 if (hw->bad_tx_carr_stats_fd &&
3743 adapter->link_duplex == FULL_DUPLEX) {
3744 netdev->stats.tx_carrier_errors = 0;
3745 adapter->stats.tncrs = 0;
3746 }
3747
3748 /* Tx Dropped needs to be maintained elsewhere */
3749
3750 /* Phy Stats */
3751 if (hw->media_type == e1000_media_type_copper) {
3752 if ((adapter->link_speed == SPEED_1000) &&
3753 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3754 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3755 adapter->phy_stats.idle_errors += phy_tmp;
3756 }
3757
3758 if ((hw->mac_type <= e1000_82546) &&
3759 (hw->phy_type == e1000_phy_m88) &&
3760 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3761 adapter->phy_stats.receive_errors += phy_tmp;
3762 }
3763
3764 /* Management Stats */
3765 if (hw->has_smbus) {
3766 adapter->stats.mgptc += er32(MGTPTC);
3767 adapter->stats.mgprc += er32(MGTPRC);
3768 adapter->stats.mgpdc += er32(MGTPDC);
3769 }
3770
3771 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3772}
3773
3774/**
3775 * e1000_intr - Interrupt Handler
3776 * @irq: interrupt number
3777 * @data: pointer to a network interface device structure
3778 **/
3779static irqreturn_t e1000_intr(int irq, void *data)
3780{
3781 struct net_device *netdev = data;
3782 struct e1000_adapter *adapter = netdev_priv(netdev);
3783 struct e1000_hw *hw = &adapter->hw;
3784 u32 icr = er32(ICR);
3785
3786 if (unlikely((!icr)))
3787 return IRQ_NONE; /* Not our interrupt */
3788
3789 /* we might have caused the interrupt, but the above
3790 * read cleared it, and just in case the driver is
3791 * down there is nothing to do so return handled
3792 */
3793 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3794 return IRQ_HANDLED;
3795
3796 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3797 hw->get_link_status = 1;
3798 /* guard against interrupt when we're going down */
3799 if (!test_bit(__E1000_DOWN, &adapter->flags))
3800 schedule_delayed_work(&adapter->watchdog_task, 1);
3801 }
3802
3803 /* disable interrupts, without the synchronize_irq bit */
3804 ew32(IMC, ~0);
3805 E1000_WRITE_FLUSH();
3806
3807 if (likely(napi_schedule_prep(&adapter->napi))) {
3808 adapter->total_tx_bytes = 0;
3809 adapter->total_tx_packets = 0;
3810 adapter->total_rx_bytes = 0;
3811 adapter->total_rx_packets = 0;
3812 __napi_schedule(&adapter->napi);
3813 } else {
3814 /* this really should not happen! if it does it is basically a
3815 * bug, but not a hard error, so enable ints and continue
3816 */
3817 if (!test_bit(__E1000_DOWN, &adapter->flags))
3818 e1000_irq_enable(adapter);
3819 }
3820
3821 return IRQ_HANDLED;
3822}
3823
3824/**
3825 * e1000_clean - NAPI Rx polling callback
3826 * @adapter: board private structure
3827 **/
3828static int e1000_clean(struct napi_struct *napi, int budget)
3829{
3830 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
3831 napi);
3832 int tx_clean_complete = 0, work_done = 0;
3833
3834 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3835
3836 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3837
3838 if (!tx_clean_complete)
3839 work_done = budget;
3840
3841 /* If budget not fully consumed, exit the polling mode */
3842 if (work_done < budget) {
3843 if (likely(adapter->itr_setting & 3))
3844 e1000_set_itr(adapter);
3845 napi_complete_done(napi, work_done);
3846 if (!test_bit(__E1000_DOWN, &adapter->flags))
3847 e1000_irq_enable(adapter);
3848 }
3849
3850 return work_done;
3851}
3852
3853/**
3854 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3855 * @adapter: board private structure
3856 **/
3857static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3858 struct e1000_tx_ring *tx_ring)
3859{
3860 struct e1000_hw *hw = &adapter->hw;
3861 struct net_device *netdev = adapter->netdev;
3862 struct e1000_tx_desc *tx_desc, *eop_desc;
3863 struct e1000_tx_buffer *buffer_info;
3864 unsigned int i, eop;
3865 unsigned int count = 0;
3866 unsigned int total_tx_bytes = 0, total_tx_packets = 0;
3867 unsigned int bytes_compl = 0, pkts_compl = 0;
3868
3869 i = tx_ring->next_to_clean;
3870 eop = tx_ring->buffer_info[i].next_to_watch;
3871 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3872
3873 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3874 (count < tx_ring->count)) {
3875 bool cleaned = false;
3876 dma_rmb(); /* read buffer_info after eop_desc */
3877 for ( ; !cleaned; count++) {
3878 tx_desc = E1000_TX_DESC(*tx_ring, i);
3879 buffer_info = &tx_ring->buffer_info[i];
3880 cleaned = (i == eop);
3881
3882 if (cleaned) {
3883 total_tx_packets += buffer_info->segs;
3884 total_tx_bytes += buffer_info->bytecount;
3885 if (buffer_info->skb) {
3886 bytes_compl += buffer_info->skb->len;
3887 pkts_compl++;
3888 }
3889
3890 }
3891 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3892 tx_desc->upper.data = 0;
3893
3894 if (unlikely(++i == tx_ring->count))
3895 i = 0;
3896 }
3897
3898 eop = tx_ring->buffer_info[i].next_to_watch;
3899 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3900 }
3901
3902 /* Synchronize with E1000_DESC_UNUSED called from e1000_xmit_frame,
3903 * which will reuse the cleaned buffers.
3904 */
3905 smp_store_release(&tx_ring->next_to_clean, i);
3906
3907 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
3908
3909#define TX_WAKE_THRESHOLD 32
3910 if (unlikely(count && netif_carrier_ok(netdev) &&
3911 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3912 /* Make sure that anybody stopping the queue after this
3913 * sees the new next_to_clean.
3914 */
3915 smp_mb();
3916
3917 if (netif_queue_stopped(netdev) &&
3918 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3919 netif_wake_queue(netdev);
3920 ++adapter->restart_queue;
3921 }
3922 }
3923
3924 if (adapter->detect_tx_hung) {
3925 /* Detect a transmit hang in hardware, this serializes the
3926 * check with the clearing of time_stamp and movement of i
3927 */
3928 adapter->detect_tx_hung = false;
3929 if (tx_ring->buffer_info[eop].time_stamp &&
3930 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3931 (adapter->tx_timeout_factor * HZ)) &&
3932 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3933
3934 /* detected Tx unit hang */
3935 e_err(drv, "Detected Tx Unit Hang\n"
3936 " Tx Queue <%lu>\n"
3937 " TDH <%x>\n"
3938 " TDT <%x>\n"
3939 " next_to_use <%x>\n"
3940 " next_to_clean <%x>\n"
3941 "buffer_info[next_to_clean]\n"
3942 " time_stamp <%lx>\n"
3943 " next_to_watch <%x>\n"
3944 " jiffies <%lx>\n"
3945 " next_to_watch.status <%x>\n",
3946 (unsigned long)(tx_ring - adapter->tx_ring),
3947 readl(hw->hw_addr + tx_ring->tdh),
3948 readl(hw->hw_addr + tx_ring->tdt),
3949 tx_ring->next_to_use,
3950 tx_ring->next_to_clean,
3951 tx_ring->buffer_info[eop].time_stamp,
3952 eop,
3953 jiffies,
3954 eop_desc->upper.fields.status);
3955 e1000_dump(adapter);
3956 netif_stop_queue(netdev);
3957 }
3958 }
3959 adapter->total_tx_bytes += total_tx_bytes;
3960 adapter->total_tx_packets += total_tx_packets;
3961 netdev->stats.tx_bytes += total_tx_bytes;
3962 netdev->stats.tx_packets += total_tx_packets;
3963 return count < tx_ring->count;
3964}
3965
3966/**
3967 * e1000_rx_checksum - Receive Checksum Offload for 82543
3968 * @adapter: board private structure
3969 * @status_err: receive descriptor status and error fields
3970 * @csum: receive descriptor csum field
3971 * @sk_buff: socket buffer with received data
3972 **/
3973static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3974 u32 csum, struct sk_buff *skb)
3975{
3976 struct e1000_hw *hw = &adapter->hw;
3977 u16 status = (u16)status_err;
3978 u8 errors = (u8)(status_err >> 24);
3979
3980 skb_checksum_none_assert(skb);
3981
3982 /* 82543 or newer only */
3983 if (unlikely(hw->mac_type < e1000_82543))
3984 return;
3985 /* Ignore Checksum bit is set */
3986 if (unlikely(status & E1000_RXD_STAT_IXSM))
3987 return;
3988 /* TCP/UDP checksum error bit is set */
3989 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3990 /* let the stack verify checksum errors */
3991 adapter->hw_csum_err++;
3992 return;
3993 }
3994 /* TCP/UDP Checksum has not been calculated */
3995 if (!(status & E1000_RXD_STAT_TCPCS))
3996 return;
3997
3998 /* It must be a TCP or UDP packet with a valid checksum */
3999 if (likely(status & E1000_RXD_STAT_TCPCS)) {
4000 /* TCP checksum is good */
4001 skb->ip_summed = CHECKSUM_UNNECESSARY;
4002 }
4003 adapter->hw_csum_good++;
4004}
4005
4006/**
4007 * e1000_consume_page - helper function for jumbo Rx path
4008 **/
4009static void e1000_consume_page(struct e1000_rx_buffer *bi, struct sk_buff *skb,
4010 u16 length)
4011{
4012 bi->rxbuf.page = NULL;
4013 skb->len += length;
4014 skb->data_len += length;
4015 skb->truesize += PAGE_SIZE;
4016}
4017
4018/**
4019 * e1000_receive_skb - helper function to handle rx indications
4020 * @adapter: board private structure
4021 * @status: descriptor status field as written by hardware
4022 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
4023 * @skb: pointer to sk_buff to be indicated to stack
4024 */
4025static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
4026 __le16 vlan, struct sk_buff *skb)
4027{
4028 skb->protocol = eth_type_trans(skb, adapter->netdev);
4029
4030 if (status & E1000_RXD_STAT_VP) {
4031 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4032
4033 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4034 }
4035 napi_gro_receive(&adapter->napi, skb);
4036}
4037
4038/**
4039 * e1000_tbi_adjust_stats
4040 * @hw: Struct containing variables accessed by shared code
4041 * @frame_len: The length of the frame in question
4042 * @mac_addr: The Ethernet destination address of the frame in question
4043 *
4044 * Adjusts the statistic counters when a frame is accepted by TBI_ACCEPT
4045 */
4046static void e1000_tbi_adjust_stats(struct e1000_hw *hw,
4047 struct e1000_hw_stats *stats,
4048 u32 frame_len, const u8 *mac_addr)
4049{
4050 u64 carry_bit;
4051
4052 /* First adjust the frame length. */
4053 frame_len--;
4054 /* We need to adjust the statistics counters, since the hardware
4055 * counters overcount this packet as a CRC error and undercount
4056 * the packet as a good packet
4057 */
4058 /* This packet should not be counted as a CRC error. */
4059 stats->crcerrs--;
4060 /* This packet does count as a Good Packet Received. */
4061 stats->gprc++;
4062
4063 /* Adjust the Good Octets received counters */
4064 carry_bit = 0x80000000 & stats->gorcl;
4065 stats->gorcl += frame_len;
4066 /* If the high bit of Gorcl (the low 32 bits of the Good Octets
4067 * Received Count) was one before the addition,
4068 * AND it is zero after, then we lost the carry out,
4069 * need to add one to Gorch (Good Octets Received Count High).
4070 * This could be simplified if all environments supported
4071 * 64-bit integers.
4072 */
4073 if (carry_bit && ((stats->gorcl & 0x80000000) == 0))
4074 stats->gorch++;
4075 /* Is this a broadcast or multicast? Check broadcast first,
4076 * since the test for a multicast frame will test positive on
4077 * a broadcast frame.
4078 */
4079 if (is_broadcast_ether_addr(mac_addr))
4080 stats->bprc++;
4081 else if (is_multicast_ether_addr(mac_addr))
4082 stats->mprc++;
4083
4084 if (frame_len == hw->max_frame_size) {
4085 /* In this case, the hardware has overcounted the number of
4086 * oversize frames.
4087 */
4088 if (stats->roc > 0)
4089 stats->roc--;
4090 }
4091
4092 /* Adjust the bin counters when the extra byte put the frame in the
4093 * wrong bin. Remember that the frame_len was adjusted above.
4094 */
4095 if (frame_len == 64) {
4096 stats->prc64++;
4097 stats->prc127--;
4098 } else if (frame_len == 127) {
4099 stats->prc127++;
4100 stats->prc255--;
4101 } else if (frame_len == 255) {
4102 stats->prc255++;
4103 stats->prc511--;
4104 } else if (frame_len == 511) {
4105 stats->prc511++;
4106 stats->prc1023--;
4107 } else if (frame_len == 1023) {
4108 stats->prc1023++;
4109 stats->prc1522--;
4110 } else if (frame_len == 1522) {
4111 stats->prc1522++;
4112 }
4113}
4114
4115static bool e1000_tbi_should_accept(struct e1000_adapter *adapter,
4116 u8 status, u8 errors,
4117 u32 length, const u8 *data)
4118{
4119 struct e1000_hw *hw = &adapter->hw;
4120 u8 last_byte = *(data + length - 1);
4121
4122 if (TBI_ACCEPT(hw, status, errors, length, last_byte)) {
4123 unsigned long irq_flags;
4124
4125 spin_lock_irqsave(&adapter->stats_lock, irq_flags);
4126 e1000_tbi_adjust_stats(hw, &adapter->stats, length, data);
4127 spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
4128
4129 return true;
4130 }
4131
4132 return false;
4133}
4134
4135static struct sk_buff *e1000_alloc_rx_skb(struct e1000_adapter *adapter,
4136 unsigned int bufsz)
4137{
4138 struct sk_buff *skb = napi_alloc_skb(&adapter->napi, bufsz);
4139
4140 if (unlikely(!skb))
4141 adapter->alloc_rx_buff_failed++;
4142 return skb;
4143}
4144
4145/**
4146 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4147 * @adapter: board private structure
4148 * @rx_ring: ring to clean
4149 * @work_done: amount of napi work completed this call
4150 * @work_to_do: max amount of work allowed for this call to do
4151 *
4152 * the return value indicates whether actual cleaning was done, there
4153 * is no guarantee that everything was cleaned
4154 */
4155static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4156 struct e1000_rx_ring *rx_ring,
4157 int *work_done, int work_to_do)
4158{
4159 struct net_device *netdev = adapter->netdev;
4160 struct pci_dev *pdev = adapter->pdev;
4161 struct e1000_rx_desc *rx_desc, *next_rxd;
4162 struct e1000_rx_buffer *buffer_info, *next_buffer;
4163 u32 length;
4164 unsigned int i;
4165 int cleaned_count = 0;
4166 bool cleaned = false;
4167 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
4168
4169 i = rx_ring->next_to_clean;
4170 rx_desc = E1000_RX_DESC(*rx_ring, i);
4171 buffer_info = &rx_ring->buffer_info[i];
4172
4173 while (rx_desc->status & E1000_RXD_STAT_DD) {
4174 struct sk_buff *skb;
4175 u8 status;
4176
4177 if (*work_done >= work_to_do)
4178 break;
4179 (*work_done)++;
4180 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
4181
4182 status = rx_desc->status;
4183
4184 if (++i == rx_ring->count)
4185 i = 0;
4186
4187 next_rxd = E1000_RX_DESC(*rx_ring, i);
4188 prefetch(next_rxd);
4189
4190 next_buffer = &rx_ring->buffer_info[i];
4191
4192 cleaned = true;
4193 cleaned_count++;
4194 dma_unmap_page(&pdev->dev, buffer_info->dma,
4195 adapter->rx_buffer_len, DMA_FROM_DEVICE);
4196 buffer_info->dma = 0;
4197
4198 length = le16_to_cpu(rx_desc->length);
4199
4200 /* errors is only valid for DD + EOP descriptors */
4201 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4202 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4203 u8 *mapped = page_address(buffer_info->rxbuf.page);
4204
4205 if (e1000_tbi_should_accept(adapter, status,
4206 rx_desc->errors,
4207 length, mapped)) {
4208 length--;
4209 } else if (netdev->features & NETIF_F_RXALL) {
4210 goto process_skb;
4211 } else {
4212 /* an error means any chain goes out the window
4213 * too
4214 */
4215 if (rx_ring->rx_skb_top)
4216 dev_kfree_skb(rx_ring->rx_skb_top);
4217 rx_ring->rx_skb_top = NULL;
4218 goto next_desc;
4219 }
4220 }
4221
4222#define rxtop rx_ring->rx_skb_top
4223process_skb:
4224 if (!(status & E1000_RXD_STAT_EOP)) {
4225 /* this descriptor is only the beginning (or middle) */
4226 if (!rxtop) {
4227 /* this is the beginning of a chain */
4228 rxtop = napi_get_frags(&adapter->napi);
4229 if (!rxtop)
4230 break;
4231
4232 skb_fill_page_desc(rxtop, 0,
4233 buffer_info->rxbuf.page,
4234 0, length);
4235 } else {
4236 /* this is the middle of a chain */
4237 skb_fill_page_desc(rxtop,
4238 skb_shinfo(rxtop)->nr_frags,
4239 buffer_info->rxbuf.page, 0, length);
4240 }
4241 e1000_consume_page(buffer_info, rxtop, length);
4242 goto next_desc;
4243 } else {
4244 if (rxtop) {
4245 /* end of the chain */
4246 skb_fill_page_desc(rxtop,
4247 skb_shinfo(rxtop)->nr_frags,
4248 buffer_info->rxbuf.page, 0, length);
4249 skb = rxtop;
4250 rxtop = NULL;
4251 e1000_consume_page(buffer_info, skb, length);
4252 } else {
4253 struct page *p;
4254 /* no chain, got EOP, this buf is the packet
4255 * copybreak to save the put_page/alloc_page
4256 */
4257 p = buffer_info->rxbuf.page;
4258 if (length <= copybreak) {
4259 u8 *vaddr;
4260
4261 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4262 length -= 4;
4263 skb = e1000_alloc_rx_skb(adapter,
4264 length);
4265 if (!skb)
4266 break;
4267
4268 vaddr = kmap_atomic(p);
4269 memcpy(skb_tail_pointer(skb), vaddr,
4270 length);
4271 kunmap_atomic(vaddr);
4272 /* re-use the page, so don't erase
4273 * buffer_info->rxbuf.page
4274 */
4275 skb_put(skb, length);
4276 e1000_rx_checksum(adapter,
4277 status | rx_desc->errors << 24,
4278 le16_to_cpu(rx_desc->csum), skb);
4279
4280 total_rx_bytes += skb->len;
4281 total_rx_packets++;
4282
4283 e1000_receive_skb(adapter, status,
4284 rx_desc->special, skb);
4285 goto next_desc;
4286 } else {
4287 skb = napi_get_frags(&adapter->napi);
4288 if (!skb) {
4289 adapter->alloc_rx_buff_failed++;
4290 break;
4291 }
4292 skb_fill_page_desc(skb, 0, p, 0,
4293 length);
4294 e1000_consume_page(buffer_info, skb,
4295 length);
4296 }
4297 }
4298 }
4299
4300 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4301 e1000_rx_checksum(adapter,
4302 (u32)(status) |
4303 ((u32)(rx_desc->errors) << 24),
4304 le16_to_cpu(rx_desc->csum), skb);
4305
4306 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4307 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4308 pskb_trim(skb, skb->len - 4);
4309 total_rx_packets++;
4310
4311 if (status & E1000_RXD_STAT_VP) {
4312 __le16 vlan = rx_desc->special;
4313 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4314
4315 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4316 }
4317
4318 napi_gro_frags(&adapter->napi);
4319
4320next_desc:
4321 rx_desc->status = 0;
4322
4323 /* return some buffers to hardware, one at a time is too slow */
4324 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4325 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4326 cleaned_count = 0;
4327 }
4328
4329 /* use prefetched values */
4330 rx_desc = next_rxd;
4331 buffer_info = next_buffer;
4332 }
4333 rx_ring->next_to_clean = i;
4334
4335 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4336 if (cleaned_count)
4337 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4338
4339 adapter->total_rx_packets += total_rx_packets;
4340 adapter->total_rx_bytes += total_rx_bytes;
4341 netdev->stats.rx_bytes += total_rx_bytes;
4342 netdev->stats.rx_packets += total_rx_packets;
4343 return cleaned;
4344}
4345
4346/* this should improve performance for small packets with large amounts
4347 * of reassembly being done in the stack
4348 */
4349static struct sk_buff *e1000_copybreak(struct e1000_adapter *adapter,
4350 struct e1000_rx_buffer *buffer_info,
4351 u32 length, const void *data)
4352{
4353 struct sk_buff *skb;
4354
4355 if (length > copybreak)
4356 return NULL;
4357
4358 skb = e1000_alloc_rx_skb(adapter, length);
4359 if (!skb)
4360 return NULL;
4361
4362 dma_sync_single_for_cpu(&adapter->pdev->dev, buffer_info->dma,
4363 length, DMA_FROM_DEVICE);
4364
4365 memcpy(skb_put(skb, length), data, length);
4366
4367 return skb;
4368}
4369
4370/**
4371 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4372 * @adapter: board private structure
4373 * @rx_ring: ring to clean
4374 * @work_done: amount of napi work completed this call
4375 * @work_to_do: max amount of work allowed for this call to do
4376 */
4377static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4378 struct e1000_rx_ring *rx_ring,
4379 int *work_done, int work_to_do)
4380{
4381 struct net_device *netdev = adapter->netdev;
4382 struct pci_dev *pdev = adapter->pdev;
4383 struct e1000_rx_desc *rx_desc, *next_rxd;
4384 struct e1000_rx_buffer *buffer_info, *next_buffer;
4385 u32 length;
4386 unsigned int i;
4387 int cleaned_count = 0;
4388 bool cleaned = false;
4389 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
4390
4391 i = rx_ring->next_to_clean;
4392 rx_desc = E1000_RX_DESC(*rx_ring, i);
4393 buffer_info = &rx_ring->buffer_info[i];
4394
4395 while (rx_desc->status & E1000_RXD_STAT_DD) {
4396 struct sk_buff *skb;
4397 u8 *data;
4398 u8 status;
4399
4400 if (*work_done >= work_to_do)
4401 break;
4402 (*work_done)++;
4403 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
4404
4405 status = rx_desc->status;
4406 length = le16_to_cpu(rx_desc->length);
4407
4408 data = buffer_info->rxbuf.data;
4409 prefetch(data);
4410 skb = e1000_copybreak(adapter, buffer_info, length, data);
4411 if (!skb) {
4412 unsigned int frag_len = e1000_frag_len(adapter);
4413
4414 skb = build_skb(data - E1000_HEADROOM, frag_len);
4415 if (!skb) {
4416 adapter->alloc_rx_buff_failed++;
4417 break;
4418 }
4419
4420 skb_reserve(skb, E1000_HEADROOM);
4421 dma_unmap_single(&pdev->dev, buffer_info->dma,
4422 adapter->rx_buffer_len,
4423 DMA_FROM_DEVICE);
4424 buffer_info->dma = 0;
4425 buffer_info->rxbuf.data = NULL;
4426 }
4427
4428 if (++i == rx_ring->count)
4429 i = 0;
4430
4431 next_rxd = E1000_RX_DESC(*rx_ring, i);
4432 prefetch(next_rxd);
4433
4434 next_buffer = &rx_ring->buffer_info[i];
4435
4436 cleaned = true;
4437 cleaned_count++;
4438
4439 /* !EOP means multiple descriptors were used to store a single
4440 * packet, if thats the case we need to toss it. In fact, we
4441 * to toss every packet with the EOP bit clear and the next
4442 * frame that _does_ have the EOP bit set, as it is by
4443 * definition only a frame fragment
4444 */
4445 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4446 adapter->discarding = true;
4447
4448 if (adapter->discarding) {
4449 /* All receives must fit into a single buffer */
4450 netdev_dbg(netdev, "Receive packet consumed multiple buffers\n");
4451 dev_kfree_skb(skb);
4452 if (status & E1000_RXD_STAT_EOP)
4453 adapter->discarding = false;
4454 goto next_desc;
4455 }
4456
4457 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4458 if (e1000_tbi_should_accept(adapter, status,
4459 rx_desc->errors,
4460 length, data)) {
4461 length--;
4462 } else if (netdev->features & NETIF_F_RXALL) {
4463 goto process_skb;
4464 } else {
4465 dev_kfree_skb(skb);
4466 goto next_desc;
4467 }
4468 }
4469
4470process_skb:
4471 total_rx_bytes += (length - 4); /* don't count FCS */
4472 total_rx_packets++;
4473
4474 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4475 /* adjust length to remove Ethernet CRC, this must be
4476 * done after the TBI_ACCEPT workaround above
4477 */
4478 length -= 4;
4479
4480 if (buffer_info->rxbuf.data == NULL)
4481 skb_put(skb, length);
4482 else /* copybreak skb */
4483 skb_trim(skb, length);
4484
4485 /* Receive Checksum Offload */
4486 e1000_rx_checksum(adapter,
4487 (u32)(status) |
4488 ((u32)(rx_desc->errors) << 24),
4489 le16_to_cpu(rx_desc->csum), skb);
4490
4491 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4492
4493next_desc:
4494 rx_desc->status = 0;
4495
4496 /* return some buffers to hardware, one at a time is too slow */
4497 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4498 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4499 cleaned_count = 0;
4500 }
4501
4502 /* use prefetched values */
4503 rx_desc = next_rxd;
4504 buffer_info = next_buffer;
4505 }
4506 rx_ring->next_to_clean = i;
4507
4508 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4509 if (cleaned_count)
4510 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4511
4512 adapter->total_rx_packets += total_rx_packets;
4513 adapter->total_rx_bytes += total_rx_bytes;
4514 netdev->stats.rx_bytes += total_rx_bytes;
4515 netdev->stats.rx_packets += total_rx_packets;
4516 return cleaned;
4517}
4518
4519/**
4520 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4521 * @adapter: address of board private structure
4522 * @rx_ring: pointer to receive ring structure
4523 * @cleaned_count: number of buffers to allocate this pass
4524 **/
4525static void
4526e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4527 struct e1000_rx_ring *rx_ring, int cleaned_count)
4528{
4529 struct pci_dev *pdev = adapter->pdev;
4530 struct e1000_rx_desc *rx_desc;
4531 struct e1000_rx_buffer *buffer_info;
4532 unsigned int i;
4533
4534 i = rx_ring->next_to_use;
4535 buffer_info = &rx_ring->buffer_info[i];
4536
4537 while (cleaned_count--) {
4538 /* allocate a new page if necessary */
4539 if (!buffer_info->rxbuf.page) {
4540 buffer_info->rxbuf.page = alloc_page(GFP_ATOMIC);
4541 if (unlikely(!buffer_info->rxbuf.page)) {
4542 adapter->alloc_rx_buff_failed++;
4543 break;
4544 }
4545 }
4546
4547 if (!buffer_info->dma) {
4548 buffer_info->dma = dma_map_page(&pdev->dev,
4549 buffer_info->rxbuf.page, 0,
4550 adapter->rx_buffer_len,
4551 DMA_FROM_DEVICE);
4552 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4553 put_page(buffer_info->rxbuf.page);
4554 buffer_info->rxbuf.page = NULL;
4555 buffer_info->dma = 0;
4556 adapter->alloc_rx_buff_failed++;
4557 break;
4558 }
4559 }
4560
4561 rx_desc = E1000_RX_DESC(*rx_ring, i);
4562 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4563
4564 if (unlikely(++i == rx_ring->count))
4565 i = 0;
4566 buffer_info = &rx_ring->buffer_info[i];
4567 }
4568
4569 if (likely(rx_ring->next_to_use != i)) {
4570 rx_ring->next_to_use = i;
4571 if (unlikely(i-- == 0))
4572 i = (rx_ring->count - 1);
4573
4574 /* Force memory writes to complete before letting h/w
4575 * know there are new descriptors to fetch. (Only
4576 * applicable for weak-ordered memory model archs,
4577 * such as IA-64).
4578 */
4579 wmb();
4580 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4581 }
4582}
4583
4584/**
4585 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4586 * @adapter: address of board private structure
4587 **/
4588static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4589 struct e1000_rx_ring *rx_ring,
4590 int cleaned_count)
4591{
4592 struct e1000_hw *hw = &adapter->hw;
4593 struct pci_dev *pdev = adapter->pdev;
4594 struct e1000_rx_desc *rx_desc;
4595 struct e1000_rx_buffer *buffer_info;
4596 unsigned int i;
4597 unsigned int bufsz = adapter->rx_buffer_len;
4598
4599 i = rx_ring->next_to_use;
4600 buffer_info = &rx_ring->buffer_info[i];
4601
4602 while (cleaned_count--) {
4603 void *data;
4604
4605 if (buffer_info->rxbuf.data)
4606 goto skip;
4607
4608 data = e1000_alloc_frag(adapter);
4609 if (!data) {
4610 /* Better luck next round */
4611 adapter->alloc_rx_buff_failed++;
4612 break;
4613 }
4614
4615 /* Fix for errata 23, can't cross 64kB boundary */
4616 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4617 void *olddata = data;
4618 e_err(rx_err, "skb align check failed: %u bytes at "
4619 "%p\n", bufsz, data);
4620 /* Try again, without freeing the previous */
4621 data = e1000_alloc_frag(adapter);
4622 /* Failed allocation, critical failure */
4623 if (!data) {
4624 skb_free_frag(olddata);
4625 adapter->alloc_rx_buff_failed++;
4626 break;
4627 }
4628
4629 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4630 /* give up */
4631 skb_free_frag(data);
4632 skb_free_frag(olddata);
4633 adapter->alloc_rx_buff_failed++;
4634 break;
4635 }
4636
4637 /* Use new allocation */
4638 skb_free_frag(olddata);
4639 }
4640 buffer_info->dma = dma_map_single(&pdev->dev,
4641 data,
4642 adapter->rx_buffer_len,
4643 DMA_FROM_DEVICE);
4644 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4645 skb_free_frag(data);
4646 buffer_info->dma = 0;
4647 adapter->alloc_rx_buff_failed++;
4648 break;
4649 }
4650
4651 /* XXX if it was allocated cleanly it will never map to a
4652 * boundary crossing
4653 */
4654
4655 /* Fix for errata 23, can't cross 64kB boundary */
4656 if (!e1000_check_64k_bound(adapter,
4657 (void *)(unsigned long)buffer_info->dma,
4658 adapter->rx_buffer_len)) {
4659 e_err(rx_err, "dma align check failed: %u bytes at "
4660 "%p\n", adapter->rx_buffer_len,
4661 (void *)(unsigned long)buffer_info->dma);
4662
4663 dma_unmap_single(&pdev->dev, buffer_info->dma,
4664 adapter->rx_buffer_len,
4665 DMA_FROM_DEVICE);
4666
4667 skb_free_frag(data);
4668 buffer_info->rxbuf.data = NULL;
4669 buffer_info->dma = 0;
4670
4671 adapter->alloc_rx_buff_failed++;
4672 break;
4673 }
4674 buffer_info->rxbuf.data = data;
4675 skip:
4676 rx_desc = E1000_RX_DESC(*rx_ring, i);
4677 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4678
4679 if (unlikely(++i == rx_ring->count))
4680 i = 0;
4681 buffer_info = &rx_ring->buffer_info[i];
4682 }
4683
4684 if (likely(rx_ring->next_to_use != i)) {
4685 rx_ring->next_to_use = i;
4686 if (unlikely(i-- == 0))
4687 i = (rx_ring->count - 1);
4688
4689 /* Force memory writes to complete before letting h/w
4690 * know there are new descriptors to fetch. (Only
4691 * applicable for weak-ordered memory model archs,
4692 * such as IA-64).
4693 */
4694 wmb();
4695 writel(i, hw->hw_addr + rx_ring->rdt);
4696 }
4697}
4698
4699/**
4700 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4701 * @adapter:
4702 **/
4703static void e1000_smartspeed(struct e1000_adapter *adapter)
4704{
4705 struct e1000_hw *hw = &adapter->hw;
4706 u16 phy_status;
4707 u16 phy_ctrl;
4708
4709 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4710 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4711 return;
4712
4713 if (adapter->smartspeed == 0) {
4714 /* If Master/Slave config fault is asserted twice,
4715 * we assume back-to-back
4716 */
4717 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4718 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT))
4719 return;
4720 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4721 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT))
4722 return;
4723 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4724 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4725 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4726 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4727 phy_ctrl);
4728 adapter->smartspeed++;
4729 if (!e1000_phy_setup_autoneg(hw) &&
4730 !e1000_read_phy_reg(hw, PHY_CTRL,
4731 &phy_ctrl)) {
4732 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4733 MII_CR_RESTART_AUTO_NEG);
4734 e1000_write_phy_reg(hw, PHY_CTRL,
4735 phy_ctrl);
4736 }
4737 }
4738 return;
4739 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4740 /* If still no link, perhaps using 2/3 pair cable */
4741 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4742 phy_ctrl |= CR_1000T_MS_ENABLE;
4743 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4744 if (!e1000_phy_setup_autoneg(hw) &&
4745 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4746 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4747 MII_CR_RESTART_AUTO_NEG);
4748 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4749 }
4750 }
4751 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4752 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4753 adapter->smartspeed = 0;
4754}
4755
4756/**
4757 * e1000_ioctl -
4758 * @netdev:
4759 * @ifreq:
4760 * @cmd:
4761 **/
4762static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4763{
4764 switch (cmd) {
4765 case SIOCGMIIPHY:
4766 case SIOCGMIIREG:
4767 case SIOCSMIIREG:
4768 return e1000_mii_ioctl(netdev, ifr, cmd);
4769 default:
4770 return -EOPNOTSUPP;
4771 }
4772}
4773
4774/**
4775 * e1000_mii_ioctl -
4776 * @netdev:
4777 * @ifreq:
4778 * @cmd:
4779 **/
4780static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4781 int cmd)
4782{
4783 struct e1000_adapter *adapter = netdev_priv(netdev);
4784 struct e1000_hw *hw = &adapter->hw;
4785 struct mii_ioctl_data *data = if_mii(ifr);
4786 int retval;
4787 u16 mii_reg;
4788 unsigned long flags;
4789
4790 if (hw->media_type != e1000_media_type_copper)
4791 return -EOPNOTSUPP;
4792
4793 switch (cmd) {
4794 case SIOCGMIIPHY:
4795 data->phy_id = hw->phy_addr;
4796 break;
4797 case SIOCGMIIREG:
4798 spin_lock_irqsave(&adapter->stats_lock, flags);
4799 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4800 &data->val_out)) {
4801 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4802 return -EIO;
4803 }
4804 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4805 break;
4806 case SIOCSMIIREG:
4807 if (data->reg_num & ~(0x1F))
4808 return -EFAULT;
4809 mii_reg = data->val_in;
4810 spin_lock_irqsave(&adapter->stats_lock, flags);
4811 if (e1000_write_phy_reg(hw, data->reg_num,
4812 mii_reg)) {
4813 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4814 return -EIO;
4815 }
4816 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4817 if (hw->media_type == e1000_media_type_copper) {
4818 switch (data->reg_num) {
4819 case PHY_CTRL:
4820 if (mii_reg & MII_CR_POWER_DOWN)
4821 break;
4822 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4823 hw->autoneg = 1;
4824 hw->autoneg_advertised = 0x2F;
4825 } else {
4826 u32 speed;
4827 if (mii_reg & 0x40)
4828 speed = SPEED_1000;
4829 else if (mii_reg & 0x2000)
4830 speed = SPEED_100;
4831 else
4832 speed = SPEED_10;
4833 retval = e1000_set_spd_dplx(
4834 adapter, speed,
4835 ((mii_reg & 0x100)
4836 ? DUPLEX_FULL :
4837 DUPLEX_HALF));
4838 if (retval)
4839 return retval;
4840 }
4841 if (netif_running(adapter->netdev))
4842 e1000_reinit_locked(adapter);
4843 else
4844 e1000_reset(adapter);
4845 break;
4846 case M88E1000_PHY_SPEC_CTRL:
4847 case M88E1000_EXT_PHY_SPEC_CTRL:
4848 if (e1000_phy_reset(hw))
4849 return -EIO;
4850 break;
4851 }
4852 } else {
4853 switch (data->reg_num) {
4854 case PHY_CTRL:
4855 if (mii_reg & MII_CR_POWER_DOWN)
4856 break;
4857 if (netif_running(adapter->netdev))
4858 e1000_reinit_locked(adapter);
4859 else
4860 e1000_reset(adapter);
4861 break;
4862 }
4863 }
4864 break;
4865 default:
4866 return -EOPNOTSUPP;
4867 }
4868 return E1000_SUCCESS;
4869}
4870
4871void e1000_pci_set_mwi(struct e1000_hw *hw)
4872{
4873 struct e1000_adapter *adapter = hw->back;
4874 int ret_val = pci_set_mwi(adapter->pdev);
4875
4876 if (ret_val)
4877 e_err(probe, "Error in setting MWI\n");
4878}
4879
4880void e1000_pci_clear_mwi(struct e1000_hw *hw)
4881{
4882 struct e1000_adapter *adapter = hw->back;
4883
4884 pci_clear_mwi(adapter->pdev);
4885}
4886
4887int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4888{
4889 struct e1000_adapter *adapter = hw->back;
4890 return pcix_get_mmrbc(adapter->pdev);
4891}
4892
4893void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4894{
4895 struct e1000_adapter *adapter = hw->back;
4896 pcix_set_mmrbc(adapter->pdev, mmrbc);
4897}
4898
4899void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4900{
4901 outl(value, port);
4902}
4903
4904static bool e1000_vlan_used(struct e1000_adapter *adapter)
4905{
4906 u16 vid;
4907
4908 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4909 return true;
4910 return false;
4911}
4912
4913static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4914 netdev_features_t features)
4915{
4916 struct e1000_hw *hw = &adapter->hw;
4917 u32 ctrl;
4918
4919 ctrl = er32(CTRL);
4920 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
4921 /* enable VLAN tag insert/strip */
4922 ctrl |= E1000_CTRL_VME;
4923 } else {
4924 /* disable VLAN tag insert/strip */
4925 ctrl &= ~E1000_CTRL_VME;
4926 }
4927 ew32(CTRL, ctrl);
4928}
4929static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4930 bool filter_on)
4931{
4932 struct e1000_hw *hw = &adapter->hw;
4933 u32 rctl;
4934
4935 if (!test_bit(__E1000_DOWN, &adapter->flags))
4936 e1000_irq_disable(adapter);
4937
4938 __e1000_vlan_mode(adapter, adapter->netdev->features);
4939 if (filter_on) {
4940 /* enable VLAN receive filtering */
4941 rctl = er32(RCTL);
4942 rctl &= ~E1000_RCTL_CFIEN;
4943 if (!(adapter->netdev->flags & IFF_PROMISC))
4944 rctl |= E1000_RCTL_VFE;
4945 ew32(RCTL, rctl);
4946 e1000_update_mng_vlan(adapter);
4947 } else {
4948 /* disable VLAN receive filtering */
4949 rctl = er32(RCTL);
4950 rctl &= ~E1000_RCTL_VFE;
4951 ew32(RCTL, rctl);
4952 }
4953
4954 if (!test_bit(__E1000_DOWN, &adapter->flags))
4955 e1000_irq_enable(adapter);
4956}
4957
4958static void e1000_vlan_mode(struct net_device *netdev,
4959 netdev_features_t features)
4960{
4961 struct e1000_adapter *adapter = netdev_priv(netdev);
4962
4963 if (!test_bit(__E1000_DOWN, &adapter->flags))
4964 e1000_irq_disable(adapter);
4965
4966 __e1000_vlan_mode(adapter, features);
4967
4968 if (!test_bit(__E1000_DOWN, &adapter->flags))
4969 e1000_irq_enable(adapter);
4970}
4971
4972static int e1000_vlan_rx_add_vid(struct net_device *netdev,
4973 __be16 proto, u16 vid)
4974{
4975 struct e1000_adapter *adapter = netdev_priv(netdev);
4976 struct e1000_hw *hw = &adapter->hw;
4977 u32 vfta, index;
4978
4979 if ((hw->mng_cookie.status &
4980 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4981 (vid == adapter->mng_vlan_id))
4982 return 0;
4983
4984 if (!e1000_vlan_used(adapter))
4985 e1000_vlan_filter_on_off(adapter, true);
4986
4987 /* add VID to filter table */
4988 index = (vid >> 5) & 0x7F;
4989 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4990 vfta |= (1 << (vid & 0x1F));
4991 e1000_write_vfta(hw, index, vfta);
4992
4993 set_bit(vid, adapter->active_vlans);
4994
4995 return 0;
4996}
4997
4998static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
4999 __be16 proto, u16 vid)
5000{
5001 struct e1000_adapter *adapter = netdev_priv(netdev);
5002 struct e1000_hw *hw = &adapter->hw;
5003 u32 vfta, index;
5004
5005 if (!test_bit(__E1000_DOWN, &adapter->flags))
5006 e1000_irq_disable(adapter);
5007 if (!test_bit(__E1000_DOWN, &adapter->flags))
5008 e1000_irq_enable(adapter);
5009
5010 /* remove VID from filter table */
5011 index = (vid >> 5) & 0x7F;
5012 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
5013 vfta &= ~(1 << (vid & 0x1F));
5014 e1000_write_vfta(hw, index, vfta);
5015
5016 clear_bit(vid, adapter->active_vlans);
5017
5018 if (!e1000_vlan_used(adapter))
5019 e1000_vlan_filter_on_off(adapter, false);
5020
5021 return 0;
5022}
5023
5024static void e1000_restore_vlan(struct e1000_adapter *adapter)
5025{
5026 u16 vid;
5027
5028 if (!e1000_vlan_used(adapter))
5029 return;
5030
5031 e1000_vlan_filter_on_off(adapter, true);
5032 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
5033 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
5034}
5035
5036int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
5037{
5038 struct e1000_hw *hw = &adapter->hw;
5039
5040 hw->autoneg = 0;
5041
5042 /* Make sure dplx is at most 1 bit and lsb of speed is not set
5043 * for the switch() below to work
5044 */
5045 if ((spd & 1) || (dplx & ~1))
5046 goto err_inval;
5047
5048 /* Fiber NICs only allow 1000 gbps Full duplex */
5049 if ((hw->media_type == e1000_media_type_fiber) &&
5050 spd != SPEED_1000 &&
5051 dplx != DUPLEX_FULL)
5052 goto err_inval;
5053
5054 switch (spd + dplx) {
5055 case SPEED_10 + DUPLEX_HALF:
5056 hw->forced_speed_duplex = e1000_10_half;
5057 break;
5058 case SPEED_10 + DUPLEX_FULL:
5059 hw->forced_speed_duplex = e1000_10_full;
5060 break;
5061 case SPEED_100 + DUPLEX_HALF:
5062 hw->forced_speed_duplex = e1000_100_half;
5063 break;
5064 case SPEED_100 + DUPLEX_FULL:
5065 hw->forced_speed_duplex = e1000_100_full;
5066 break;
5067 case SPEED_1000 + DUPLEX_FULL:
5068 hw->autoneg = 1;
5069 hw->autoneg_advertised = ADVERTISE_1000_FULL;
5070 break;
5071 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5072 default:
5073 goto err_inval;
5074 }
5075
5076 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
5077 hw->mdix = AUTO_ALL_MODES;
5078
5079 return 0;
5080
5081err_inval:
5082 e_err(probe, "Unsupported Speed/Duplex configuration\n");
5083 return -EINVAL;
5084}
5085
5086static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
5087{
5088 struct net_device *netdev = pci_get_drvdata(pdev);
5089 struct e1000_adapter *adapter = netdev_priv(netdev);
5090 struct e1000_hw *hw = &adapter->hw;
5091 u32 ctrl, ctrl_ext, rctl, status;
5092 u32 wufc = adapter->wol;
5093#ifdef CONFIG_PM
5094 int retval = 0;
5095#endif
5096
5097 netif_device_detach(netdev);
5098
5099 if (netif_running(netdev)) {
5100 int count = E1000_CHECK_RESET_COUNT;
5101
5102 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
5103 usleep_range(10000, 20000);
5104
5105 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5106 e1000_down(adapter);
5107 }
5108
5109#ifdef CONFIG_PM
5110 retval = pci_save_state(pdev);
5111 if (retval)
5112 return retval;
5113#endif
5114
5115 status = er32(STATUS);
5116 if (status & E1000_STATUS_LU)
5117 wufc &= ~E1000_WUFC_LNKC;
5118
5119 if (wufc) {
5120 e1000_setup_rctl(adapter);
5121 e1000_set_rx_mode(netdev);
5122
5123 rctl = er32(RCTL);
5124
5125 /* turn on all-multi mode if wake on multicast is enabled */
5126 if (wufc & E1000_WUFC_MC)
5127 rctl |= E1000_RCTL_MPE;
5128
5129 /* enable receives in the hardware */
5130 ew32(RCTL, rctl | E1000_RCTL_EN);
5131
5132 if (hw->mac_type >= e1000_82540) {
5133 ctrl = er32(CTRL);
5134 /* advertise wake from D3Cold */
5135 #define E1000_CTRL_ADVD3WUC 0x00100000
5136 /* phy power management enable */
5137 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5138 ctrl |= E1000_CTRL_ADVD3WUC |
5139 E1000_CTRL_EN_PHY_PWR_MGMT;
5140 ew32(CTRL, ctrl);
5141 }
5142
5143 if (hw->media_type == e1000_media_type_fiber ||
5144 hw->media_type == e1000_media_type_internal_serdes) {
5145 /* keep the laser running in D3 */
5146 ctrl_ext = er32(CTRL_EXT);
5147 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5148 ew32(CTRL_EXT, ctrl_ext);
5149 }
5150
5151 ew32(WUC, E1000_WUC_PME_EN);
5152 ew32(WUFC, wufc);
5153 } else {
5154 ew32(WUC, 0);
5155 ew32(WUFC, 0);
5156 }
5157
5158 e1000_release_manageability(adapter);
5159
5160 *enable_wake = !!wufc;
5161
5162 /* make sure adapter isn't asleep if manageability is enabled */
5163 if (adapter->en_mng_pt)
5164 *enable_wake = true;
5165
5166 if (netif_running(netdev))
5167 e1000_free_irq(adapter);
5168
5169 pci_disable_device(pdev);
5170
5171 return 0;
5172}
5173
5174#ifdef CONFIG_PM
5175static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5176{
5177 int retval;
5178 bool wake;
5179
5180 retval = __e1000_shutdown(pdev, &wake);
5181 if (retval)
5182 return retval;
5183
5184 if (wake) {
5185 pci_prepare_to_sleep(pdev);
5186 } else {
5187 pci_wake_from_d3(pdev, false);
5188 pci_set_power_state(pdev, PCI_D3hot);
5189 }
5190
5191 return 0;
5192}
5193
5194static int e1000_resume(struct pci_dev *pdev)
5195{
5196 struct net_device *netdev = pci_get_drvdata(pdev);
5197 struct e1000_adapter *adapter = netdev_priv(netdev);
5198 struct e1000_hw *hw = &adapter->hw;
5199 u32 err;
5200
5201 pci_set_power_state(pdev, PCI_D0);
5202 pci_restore_state(pdev);
5203 pci_save_state(pdev);
5204
5205 if (adapter->need_ioport)
5206 err = pci_enable_device(pdev);
5207 else
5208 err = pci_enable_device_mem(pdev);
5209 if (err) {
5210 pr_err("Cannot enable PCI device from suspend\n");
5211 return err;
5212 }
5213 pci_set_master(pdev);
5214
5215 pci_enable_wake(pdev, PCI_D3hot, 0);
5216 pci_enable_wake(pdev, PCI_D3cold, 0);
5217
5218 if (netif_running(netdev)) {
5219 err = e1000_request_irq(adapter);
5220 if (err)
5221 return err;
5222 }
5223
5224 e1000_power_up_phy(adapter);
5225 e1000_reset(adapter);
5226 ew32(WUS, ~0);
5227
5228 e1000_init_manageability(adapter);
5229
5230 if (netif_running(netdev))
5231 e1000_up(adapter);
5232
5233 netif_device_attach(netdev);
5234
5235 return 0;
5236}
5237#endif
5238
5239static void e1000_shutdown(struct pci_dev *pdev)
5240{
5241 bool wake;
5242
5243 __e1000_shutdown(pdev, &wake);
5244
5245 if (system_state == SYSTEM_POWER_OFF) {
5246 pci_wake_from_d3(pdev, wake);
5247 pci_set_power_state(pdev, PCI_D3hot);
5248 }
5249}
5250
5251#ifdef CONFIG_NET_POLL_CONTROLLER
5252/* Polling 'interrupt' - used by things like netconsole to send skbs
5253 * without having to re-enable interrupts. It's not called while
5254 * the interrupt routine is executing.
5255 */
5256static void e1000_netpoll(struct net_device *netdev)
5257{
5258 struct e1000_adapter *adapter = netdev_priv(netdev);
5259
5260 disable_irq(adapter->pdev->irq);
5261 e1000_intr(adapter->pdev->irq, netdev);
5262 enable_irq(adapter->pdev->irq);
5263}
5264#endif
5265
5266/**
5267 * e1000_io_error_detected - called when PCI error is detected
5268 * @pdev: Pointer to PCI device
5269 * @state: The current pci connection state
5270 *
5271 * This function is called after a PCI bus error affecting
5272 * this device has been detected.
5273 */
5274static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5275 pci_channel_state_t state)
5276{
5277 struct net_device *netdev = pci_get_drvdata(pdev);
5278 struct e1000_adapter *adapter = netdev_priv(netdev);
5279
5280 netif_device_detach(netdev);
5281
5282 if (state == pci_channel_io_perm_failure)
5283 return PCI_ERS_RESULT_DISCONNECT;
5284
5285 if (netif_running(netdev))
5286 e1000_down(adapter);
5287 pci_disable_device(pdev);
5288
5289 /* Request a slot slot reset. */
5290 return PCI_ERS_RESULT_NEED_RESET;
5291}
5292
5293/**
5294 * e1000_io_slot_reset - called after the pci bus has been reset.
5295 * @pdev: Pointer to PCI device
5296 *
5297 * Restart the card from scratch, as if from a cold-boot. Implementation
5298 * resembles the first-half of the e1000_resume routine.
5299 */
5300static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5301{
5302 struct net_device *netdev = pci_get_drvdata(pdev);
5303 struct e1000_adapter *adapter = netdev_priv(netdev);
5304 struct e1000_hw *hw = &adapter->hw;
5305 int err;
5306
5307 if (adapter->need_ioport)
5308 err = pci_enable_device(pdev);
5309 else
5310 err = pci_enable_device_mem(pdev);
5311 if (err) {
5312 pr_err("Cannot re-enable PCI device after reset.\n");
5313 return PCI_ERS_RESULT_DISCONNECT;
5314 }
5315 pci_set_master(pdev);
5316
5317 pci_enable_wake(pdev, PCI_D3hot, 0);
5318 pci_enable_wake(pdev, PCI_D3cold, 0);
5319
5320 e1000_reset(adapter);
5321 ew32(WUS, ~0);
5322
5323 return PCI_ERS_RESULT_RECOVERED;
5324}
5325
5326/**
5327 * e1000_io_resume - called when traffic can start flowing again.
5328 * @pdev: Pointer to PCI device
5329 *
5330 * This callback is called when the error recovery driver tells us that
5331 * its OK to resume normal operation. Implementation resembles the
5332 * second-half of the e1000_resume routine.
5333 */
5334static void e1000_io_resume(struct pci_dev *pdev)
5335{
5336 struct net_device *netdev = pci_get_drvdata(pdev);
5337 struct e1000_adapter *adapter = netdev_priv(netdev);
5338
5339 e1000_init_manageability(adapter);
5340
5341 if (netif_running(netdev)) {
5342 if (e1000_up(adapter)) {
5343 pr_info("can't bring device back up after reset\n");
5344 return;
5345 }
5346 }
5347
5348 netif_device_attach(netdev);
5349}
5350
5351/* e1000_main.c */
1// SPDX-License-Identifier: GPL-2.0
2/*******************************************************************************
3
4 Intel PRO/1000 Linux driver
5 Copyright(c) 1999 - 2006 Intel Corporation.
6
7 This program is free software; you can redistribute it and/or modify it
8 under the terms and conditions of the GNU General Public License,
9 version 2, as published by the Free Software Foundation.
10
11 This program is distributed in the hope it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 more details.
15
16 You should have received a copy of the GNU General Public License along with
17 this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19
20 The full GNU General Public License is included in this distribution in
21 the file called "COPYING".
22
23 Contact Information:
24 Linux NICS <linux.nics@intel.com>
25 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
26 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27
28*******************************************************************************/
29
30#include "e1000.h"
31#include <net/ip6_checksum.h>
32#include <linux/io.h>
33#include <linux/prefetch.h>
34#include <linux/bitops.h>
35#include <linux/if_vlan.h>
36
37char e1000_driver_name[] = "e1000";
38static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
39#define DRV_VERSION "7.3.21-k8-NAPI"
40const char e1000_driver_version[] = DRV_VERSION;
41static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
42
43/* e1000_pci_tbl - PCI Device ID Table
44 *
45 * Last entry must be all 0s
46 *
47 * Macro expands to...
48 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
49 */
50static const struct pci_device_id e1000_pci_tbl[] = {
51 INTEL_E1000_ETHERNET_DEVICE(0x1000),
52 INTEL_E1000_ETHERNET_DEVICE(0x1001),
53 INTEL_E1000_ETHERNET_DEVICE(0x1004),
54 INTEL_E1000_ETHERNET_DEVICE(0x1008),
55 INTEL_E1000_ETHERNET_DEVICE(0x1009),
56 INTEL_E1000_ETHERNET_DEVICE(0x100C),
57 INTEL_E1000_ETHERNET_DEVICE(0x100D),
58 INTEL_E1000_ETHERNET_DEVICE(0x100E),
59 INTEL_E1000_ETHERNET_DEVICE(0x100F),
60 INTEL_E1000_ETHERNET_DEVICE(0x1010),
61 INTEL_E1000_ETHERNET_DEVICE(0x1011),
62 INTEL_E1000_ETHERNET_DEVICE(0x1012),
63 INTEL_E1000_ETHERNET_DEVICE(0x1013),
64 INTEL_E1000_ETHERNET_DEVICE(0x1014),
65 INTEL_E1000_ETHERNET_DEVICE(0x1015),
66 INTEL_E1000_ETHERNET_DEVICE(0x1016),
67 INTEL_E1000_ETHERNET_DEVICE(0x1017),
68 INTEL_E1000_ETHERNET_DEVICE(0x1018),
69 INTEL_E1000_ETHERNET_DEVICE(0x1019),
70 INTEL_E1000_ETHERNET_DEVICE(0x101A),
71 INTEL_E1000_ETHERNET_DEVICE(0x101D),
72 INTEL_E1000_ETHERNET_DEVICE(0x101E),
73 INTEL_E1000_ETHERNET_DEVICE(0x1026),
74 INTEL_E1000_ETHERNET_DEVICE(0x1027),
75 INTEL_E1000_ETHERNET_DEVICE(0x1028),
76 INTEL_E1000_ETHERNET_DEVICE(0x1075),
77 INTEL_E1000_ETHERNET_DEVICE(0x1076),
78 INTEL_E1000_ETHERNET_DEVICE(0x1077),
79 INTEL_E1000_ETHERNET_DEVICE(0x1078),
80 INTEL_E1000_ETHERNET_DEVICE(0x1079),
81 INTEL_E1000_ETHERNET_DEVICE(0x107A),
82 INTEL_E1000_ETHERNET_DEVICE(0x107B),
83 INTEL_E1000_ETHERNET_DEVICE(0x107C),
84 INTEL_E1000_ETHERNET_DEVICE(0x108A),
85 INTEL_E1000_ETHERNET_DEVICE(0x1099),
86 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
87 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
88 /* required last entry */
89 {0,}
90};
91
92MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
93
94int e1000_up(struct e1000_adapter *adapter);
95void e1000_down(struct e1000_adapter *adapter);
96void e1000_reinit_locked(struct e1000_adapter *adapter);
97void e1000_reset(struct e1000_adapter *adapter);
98int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
99int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
100void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
101void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
102static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
103 struct e1000_tx_ring *txdr);
104static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
105 struct e1000_rx_ring *rxdr);
106static void e1000_free_tx_resources(struct e1000_adapter *adapter,
107 struct e1000_tx_ring *tx_ring);
108static void e1000_free_rx_resources(struct e1000_adapter *adapter,
109 struct e1000_rx_ring *rx_ring);
110void e1000_update_stats(struct e1000_adapter *adapter);
111
112static int e1000_init_module(void);
113static void e1000_exit_module(void);
114static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
115static void e1000_remove(struct pci_dev *pdev);
116static int e1000_alloc_queues(struct e1000_adapter *adapter);
117static int e1000_sw_init(struct e1000_adapter *adapter);
118int e1000_open(struct net_device *netdev);
119int e1000_close(struct net_device *netdev);
120static void e1000_configure_tx(struct e1000_adapter *adapter);
121static void e1000_configure_rx(struct e1000_adapter *adapter);
122static void e1000_setup_rctl(struct e1000_adapter *adapter);
123static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
124static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
125static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
126 struct e1000_tx_ring *tx_ring);
127static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
128 struct e1000_rx_ring *rx_ring);
129static void e1000_set_rx_mode(struct net_device *netdev);
130static void e1000_update_phy_info_task(struct work_struct *work);
131static void e1000_watchdog(struct work_struct *work);
132static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
133static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
134 struct net_device *netdev);
135static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
136static int e1000_set_mac(struct net_device *netdev, void *p);
137static irqreturn_t e1000_intr(int irq, void *data);
138static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
139 struct e1000_tx_ring *tx_ring);
140static int e1000_clean(struct napi_struct *napi, int budget);
141static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
142 struct e1000_rx_ring *rx_ring,
143 int *work_done, int work_to_do);
144static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
145 struct e1000_rx_ring *rx_ring,
146 int *work_done, int work_to_do);
147static void e1000_alloc_dummy_rx_buffers(struct e1000_adapter *adapter,
148 struct e1000_rx_ring *rx_ring,
149 int cleaned_count)
150{
151}
152static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
153 struct e1000_rx_ring *rx_ring,
154 int cleaned_count);
155static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
156 struct e1000_rx_ring *rx_ring,
157 int cleaned_count);
158static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
159static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
160 int cmd);
161static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
162static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
163static void e1000_tx_timeout(struct net_device *dev);
164static void e1000_reset_task(struct work_struct *work);
165static void e1000_smartspeed(struct e1000_adapter *adapter);
166static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
167 struct sk_buff *skb);
168
169static bool e1000_vlan_used(struct e1000_adapter *adapter);
170static void e1000_vlan_mode(struct net_device *netdev,
171 netdev_features_t features);
172static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
173 bool filter_on);
174static int e1000_vlan_rx_add_vid(struct net_device *netdev,
175 __be16 proto, u16 vid);
176static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
177 __be16 proto, u16 vid);
178static void e1000_restore_vlan(struct e1000_adapter *adapter);
179
180#ifdef CONFIG_PM
181static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
182static int e1000_resume(struct pci_dev *pdev);
183#endif
184static void e1000_shutdown(struct pci_dev *pdev);
185
186#ifdef CONFIG_NET_POLL_CONTROLLER
187/* for netdump / net console */
188static void e1000_netpoll (struct net_device *netdev);
189#endif
190
191#define COPYBREAK_DEFAULT 256
192static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
193module_param(copybreak, uint, 0644);
194MODULE_PARM_DESC(copybreak,
195 "Maximum size of packet that is copied to a new buffer on receive");
196
197static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
198 pci_channel_state_t state);
199static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
200static void e1000_io_resume(struct pci_dev *pdev);
201
202static const struct pci_error_handlers e1000_err_handler = {
203 .error_detected = e1000_io_error_detected,
204 .slot_reset = e1000_io_slot_reset,
205 .resume = e1000_io_resume,
206};
207
208static struct pci_driver e1000_driver = {
209 .name = e1000_driver_name,
210 .id_table = e1000_pci_tbl,
211 .probe = e1000_probe,
212 .remove = e1000_remove,
213#ifdef CONFIG_PM
214 /* Power Management Hooks */
215 .suspend = e1000_suspend,
216 .resume = e1000_resume,
217#endif
218 .shutdown = e1000_shutdown,
219 .err_handler = &e1000_err_handler
220};
221
222MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
223MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
224MODULE_LICENSE("GPL");
225MODULE_VERSION(DRV_VERSION);
226
227#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
228static int debug = -1;
229module_param(debug, int, 0);
230MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
231
232/**
233 * e1000_get_hw_dev - return device
234 * used by hardware layer to print debugging information
235 *
236 **/
237struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
238{
239 struct e1000_adapter *adapter = hw->back;
240 return adapter->netdev;
241}
242
243/**
244 * e1000_init_module - Driver Registration Routine
245 *
246 * e1000_init_module is the first routine called when the driver is
247 * loaded. All it does is register with the PCI subsystem.
248 **/
249static int __init e1000_init_module(void)
250{
251 int ret;
252 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
253
254 pr_info("%s\n", e1000_copyright);
255
256 ret = pci_register_driver(&e1000_driver);
257 if (copybreak != COPYBREAK_DEFAULT) {
258 if (copybreak == 0)
259 pr_info("copybreak disabled\n");
260 else
261 pr_info("copybreak enabled for "
262 "packets <= %u bytes\n", copybreak);
263 }
264 return ret;
265}
266
267module_init(e1000_init_module);
268
269/**
270 * e1000_exit_module - Driver Exit Cleanup Routine
271 *
272 * e1000_exit_module is called just before the driver is removed
273 * from memory.
274 **/
275static void __exit e1000_exit_module(void)
276{
277 pci_unregister_driver(&e1000_driver);
278}
279
280module_exit(e1000_exit_module);
281
282static int e1000_request_irq(struct e1000_adapter *adapter)
283{
284 struct net_device *netdev = adapter->netdev;
285 irq_handler_t handler = e1000_intr;
286 int irq_flags = IRQF_SHARED;
287 int err;
288
289 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
290 netdev);
291 if (err) {
292 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
293 }
294
295 return err;
296}
297
298static void e1000_free_irq(struct e1000_adapter *adapter)
299{
300 struct net_device *netdev = adapter->netdev;
301
302 free_irq(adapter->pdev->irq, netdev);
303}
304
305/**
306 * e1000_irq_disable - Mask off interrupt generation on the NIC
307 * @adapter: board private structure
308 **/
309static void e1000_irq_disable(struct e1000_adapter *adapter)
310{
311 struct e1000_hw *hw = &adapter->hw;
312
313 ew32(IMC, ~0);
314 E1000_WRITE_FLUSH();
315 synchronize_irq(adapter->pdev->irq);
316}
317
318/**
319 * e1000_irq_enable - Enable default interrupt generation settings
320 * @adapter: board private structure
321 **/
322static void e1000_irq_enable(struct e1000_adapter *adapter)
323{
324 struct e1000_hw *hw = &adapter->hw;
325
326 ew32(IMS, IMS_ENABLE_MASK);
327 E1000_WRITE_FLUSH();
328}
329
330static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
331{
332 struct e1000_hw *hw = &adapter->hw;
333 struct net_device *netdev = adapter->netdev;
334 u16 vid = hw->mng_cookie.vlan_id;
335 u16 old_vid = adapter->mng_vlan_id;
336
337 if (!e1000_vlan_used(adapter))
338 return;
339
340 if (!test_bit(vid, adapter->active_vlans)) {
341 if (hw->mng_cookie.status &
342 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
343 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
344 adapter->mng_vlan_id = vid;
345 } else {
346 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
347 }
348 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
349 (vid != old_vid) &&
350 !test_bit(old_vid, adapter->active_vlans))
351 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
352 old_vid);
353 } else {
354 adapter->mng_vlan_id = vid;
355 }
356}
357
358static void e1000_init_manageability(struct e1000_adapter *adapter)
359{
360 struct e1000_hw *hw = &adapter->hw;
361
362 if (adapter->en_mng_pt) {
363 u32 manc = er32(MANC);
364
365 /* disable hardware interception of ARP */
366 manc &= ~(E1000_MANC_ARP_EN);
367
368 ew32(MANC, manc);
369 }
370}
371
372static void e1000_release_manageability(struct e1000_adapter *adapter)
373{
374 struct e1000_hw *hw = &adapter->hw;
375
376 if (adapter->en_mng_pt) {
377 u32 manc = er32(MANC);
378
379 /* re-enable hardware interception of ARP */
380 manc |= E1000_MANC_ARP_EN;
381
382 ew32(MANC, manc);
383 }
384}
385
386/**
387 * e1000_configure - configure the hardware for RX and TX
388 * @adapter = private board structure
389 **/
390static void e1000_configure(struct e1000_adapter *adapter)
391{
392 struct net_device *netdev = adapter->netdev;
393 int i;
394
395 e1000_set_rx_mode(netdev);
396
397 e1000_restore_vlan(adapter);
398 e1000_init_manageability(adapter);
399
400 e1000_configure_tx(adapter);
401 e1000_setup_rctl(adapter);
402 e1000_configure_rx(adapter);
403 /* call E1000_DESC_UNUSED which always leaves
404 * at least 1 descriptor unused to make sure
405 * next_to_use != next_to_clean
406 */
407 for (i = 0; i < adapter->num_rx_queues; i++) {
408 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
409 adapter->alloc_rx_buf(adapter, ring,
410 E1000_DESC_UNUSED(ring));
411 }
412}
413
414int e1000_up(struct e1000_adapter *adapter)
415{
416 struct e1000_hw *hw = &adapter->hw;
417
418 /* hardware has been reset, we need to reload some things */
419 e1000_configure(adapter);
420
421 clear_bit(__E1000_DOWN, &adapter->flags);
422
423 napi_enable(&adapter->napi);
424
425 e1000_irq_enable(adapter);
426
427 netif_wake_queue(adapter->netdev);
428
429 /* fire a link change interrupt to start the watchdog */
430 ew32(ICS, E1000_ICS_LSC);
431 return 0;
432}
433
434/**
435 * e1000_power_up_phy - restore link in case the phy was powered down
436 * @adapter: address of board private structure
437 *
438 * The phy may be powered down to save power and turn off link when the
439 * driver is unloaded and wake on lan is not enabled (among others)
440 * *** this routine MUST be followed by a call to e1000_reset ***
441 **/
442void e1000_power_up_phy(struct e1000_adapter *adapter)
443{
444 struct e1000_hw *hw = &adapter->hw;
445 u16 mii_reg = 0;
446
447 /* Just clear the power down bit to wake the phy back up */
448 if (hw->media_type == e1000_media_type_copper) {
449 /* according to the manual, the phy will retain its
450 * settings across a power-down/up cycle
451 */
452 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
453 mii_reg &= ~MII_CR_POWER_DOWN;
454 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
455 }
456}
457
458static void e1000_power_down_phy(struct e1000_adapter *adapter)
459{
460 struct e1000_hw *hw = &adapter->hw;
461
462 /* Power down the PHY so no link is implied when interface is down *
463 * The PHY cannot be powered down if any of the following is true *
464 * (a) WoL is enabled
465 * (b) AMT is active
466 * (c) SoL/IDER session is active
467 */
468 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
469 hw->media_type == e1000_media_type_copper) {
470 u16 mii_reg = 0;
471
472 switch (hw->mac_type) {
473 case e1000_82540:
474 case e1000_82545:
475 case e1000_82545_rev_3:
476 case e1000_82546:
477 case e1000_ce4100:
478 case e1000_82546_rev_3:
479 case e1000_82541:
480 case e1000_82541_rev_2:
481 case e1000_82547:
482 case e1000_82547_rev_2:
483 if (er32(MANC) & E1000_MANC_SMBUS_EN)
484 goto out;
485 break;
486 default:
487 goto out;
488 }
489 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
490 mii_reg |= MII_CR_POWER_DOWN;
491 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
492 msleep(1);
493 }
494out:
495 return;
496}
497
498static void e1000_down_and_stop(struct e1000_adapter *adapter)
499{
500 set_bit(__E1000_DOWN, &adapter->flags);
501
502 cancel_delayed_work_sync(&adapter->watchdog_task);
503
504 /*
505 * Since the watchdog task can reschedule other tasks, we should cancel
506 * it first, otherwise we can run into the situation when a work is
507 * still running after the adapter has been turned down.
508 */
509
510 cancel_delayed_work_sync(&adapter->phy_info_task);
511 cancel_delayed_work_sync(&adapter->fifo_stall_task);
512
513 /* Only kill reset task if adapter is not resetting */
514 if (!test_bit(__E1000_RESETTING, &adapter->flags))
515 cancel_work_sync(&adapter->reset_task);
516}
517
518void e1000_down(struct e1000_adapter *adapter)
519{
520 struct e1000_hw *hw = &adapter->hw;
521 struct net_device *netdev = adapter->netdev;
522 u32 rctl, tctl;
523
524 /* disable receives in the hardware */
525 rctl = er32(RCTL);
526 ew32(RCTL, rctl & ~E1000_RCTL_EN);
527 /* flush and sleep below */
528
529 netif_tx_disable(netdev);
530
531 /* disable transmits in the hardware */
532 tctl = er32(TCTL);
533 tctl &= ~E1000_TCTL_EN;
534 ew32(TCTL, tctl);
535 /* flush both disables and wait for them to finish */
536 E1000_WRITE_FLUSH();
537 msleep(10);
538
539 /* Set the carrier off after transmits have been disabled in the
540 * hardware, to avoid race conditions with e1000_watchdog() (which
541 * may be running concurrently to us, checking for the carrier
542 * bit to decide whether it should enable transmits again). Such
543 * a race condition would result into transmission being disabled
544 * in the hardware until the next IFF_DOWN+IFF_UP cycle.
545 */
546 netif_carrier_off(netdev);
547
548 napi_disable(&adapter->napi);
549
550 e1000_irq_disable(adapter);
551
552 /* Setting DOWN must be after irq_disable to prevent
553 * a screaming interrupt. Setting DOWN also prevents
554 * tasks from rescheduling.
555 */
556 e1000_down_and_stop(adapter);
557
558 adapter->link_speed = 0;
559 adapter->link_duplex = 0;
560
561 e1000_reset(adapter);
562 e1000_clean_all_tx_rings(adapter);
563 e1000_clean_all_rx_rings(adapter);
564}
565
566void e1000_reinit_locked(struct e1000_adapter *adapter)
567{
568 WARN_ON(in_interrupt());
569 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
570 msleep(1);
571 e1000_down(adapter);
572 e1000_up(adapter);
573 clear_bit(__E1000_RESETTING, &adapter->flags);
574}
575
576void e1000_reset(struct e1000_adapter *adapter)
577{
578 struct e1000_hw *hw = &adapter->hw;
579 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
580 bool legacy_pba_adjust = false;
581 u16 hwm;
582
583 /* Repartition Pba for greater than 9k mtu
584 * To take effect CTRL.RST is required.
585 */
586
587 switch (hw->mac_type) {
588 case e1000_82542_rev2_0:
589 case e1000_82542_rev2_1:
590 case e1000_82543:
591 case e1000_82544:
592 case e1000_82540:
593 case e1000_82541:
594 case e1000_82541_rev_2:
595 legacy_pba_adjust = true;
596 pba = E1000_PBA_48K;
597 break;
598 case e1000_82545:
599 case e1000_82545_rev_3:
600 case e1000_82546:
601 case e1000_ce4100:
602 case e1000_82546_rev_3:
603 pba = E1000_PBA_48K;
604 break;
605 case e1000_82547:
606 case e1000_82547_rev_2:
607 legacy_pba_adjust = true;
608 pba = E1000_PBA_30K;
609 break;
610 case e1000_undefined:
611 case e1000_num_macs:
612 break;
613 }
614
615 if (legacy_pba_adjust) {
616 if (hw->max_frame_size > E1000_RXBUFFER_8192)
617 pba -= 8; /* allocate more FIFO for Tx */
618
619 if (hw->mac_type == e1000_82547) {
620 adapter->tx_fifo_head = 0;
621 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
622 adapter->tx_fifo_size =
623 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
624 atomic_set(&adapter->tx_fifo_stall, 0);
625 }
626 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
627 /* adjust PBA for jumbo frames */
628 ew32(PBA, pba);
629
630 /* To maintain wire speed transmits, the Tx FIFO should be
631 * large enough to accommodate two full transmit packets,
632 * rounded up to the next 1KB and expressed in KB. Likewise,
633 * the Rx FIFO should be large enough to accommodate at least
634 * one full receive packet and is similarly rounded up and
635 * expressed in KB.
636 */
637 pba = er32(PBA);
638 /* upper 16 bits has Tx packet buffer allocation size in KB */
639 tx_space = pba >> 16;
640 /* lower 16 bits has Rx packet buffer allocation size in KB */
641 pba &= 0xffff;
642 /* the Tx fifo also stores 16 bytes of information about the Tx
643 * but don't include ethernet FCS because hardware appends it
644 */
645 min_tx_space = (hw->max_frame_size +
646 sizeof(struct e1000_tx_desc) -
647 ETH_FCS_LEN) * 2;
648 min_tx_space = ALIGN(min_tx_space, 1024);
649 min_tx_space >>= 10;
650 /* software strips receive CRC, so leave room for it */
651 min_rx_space = hw->max_frame_size;
652 min_rx_space = ALIGN(min_rx_space, 1024);
653 min_rx_space >>= 10;
654
655 /* If current Tx allocation is less than the min Tx FIFO size,
656 * and the min Tx FIFO size is less than the current Rx FIFO
657 * allocation, take space away from current Rx allocation
658 */
659 if (tx_space < min_tx_space &&
660 ((min_tx_space - tx_space) < pba)) {
661 pba = pba - (min_tx_space - tx_space);
662
663 /* PCI/PCIx hardware has PBA alignment constraints */
664 switch (hw->mac_type) {
665 case e1000_82545 ... e1000_82546_rev_3:
666 pba &= ~(E1000_PBA_8K - 1);
667 break;
668 default:
669 break;
670 }
671
672 /* if short on Rx space, Rx wins and must trump Tx
673 * adjustment or use Early Receive if available
674 */
675 if (pba < min_rx_space)
676 pba = min_rx_space;
677 }
678 }
679
680 ew32(PBA, pba);
681
682 /* flow control settings:
683 * The high water mark must be low enough to fit one full frame
684 * (or the size used for early receive) above it in the Rx FIFO.
685 * Set it to the lower of:
686 * - 90% of the Rx FIFO size, and
687 * - the full Rx FIFO size minus the early receive size (for parts
688 * with ERT support assuming ERT set to E1000_ERT_2048), or
689 * - the full Rx FIFO size minus one full frame
690 */
691 hwm = min(((pba << 10) * 9 / 10),
692 ((pba << 10) - hw->max_frame_size));
693
694 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
695 hw->fc_low_water = hw->fc_high_water - 8;
696 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
697 hw->fc_send_xon = 1;
698 hw->fc = hw->original_fc;
699
700 /* Allow time for pending master requests to run */
701 e1000_reset_hw(hw);
702 if (hw->mac_type >= e1000_82544)
703 ew32(WUC, 0);
704
705 if (e1000_init_hw(hw))
706 e_dev_err("Hardware Error\n");
707 e1000_update_mng_vlan(adapter);
708
709 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
710 if (hw->mac_type >= e1000_82544 &&
711 hw->autoneg == 1 &&
712 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
713 u32 ctrl = er32(CTRL);
714 /* clear phy power management bit if we are in gig only mode,
715 * which if enabled will attempt negotiation to 100Mb, which
716 * can cause a loss of link at power off or driver unload
717 */
718 ctrl &= ~E1000_CTRL_SWDPIN3;
719 ew32(CTRL, ctrl);
720 }
721
722 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
723 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
724
725 e1000_reset_adaptive(hw);
726 e1000_phy_get_info(hw, &adapter->phy_info);
727
728 e1000_release_manageability(adapter);
729}
730
731/* Dump the eeprom for users having checksum issues */
732static void e1000_dump_eeprom(struct e1000_adapter *adapter)
733{
734 struct net_device *netdev = adapter->netdev;
735 struct ethtool_eeprom eeprom;
736 const struct ethtool_ops *ops = netdev->ethtool_ops;
737 u8 *data;
738 int i;
739 u16 csum_old, csum_new = 0;
740
741 eeprom.len = ops->get_eeprom_len(netdev);
742 eeprom.offset = 0;
743
744 data = kmalloc(eeprom.len, GFP_KERNEL);
745 if (!data)
746 return;
747
748 ops->get_eeprom(netdev, &eeprom, data);
749
750 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
751 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
752 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
753 csum_new += data[i] + (data[i + 1] << 8);
754 csum_new = EEPROM_SUM - csum_new;
755
756 pr_err("/*********************/\n");
757 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
758 pr_err("Calculated : 0x%04x\n", csum_new);
759
760 pr_err("Offset Values\n");
761 pr_err("======== ======\n");
762 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
763
764 pr_err("Include this output when contacting your support provider.\n");
765 pr_err("This is not a software error! Something bad happened to\n");
766 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
767 pr_err("result in further problems, possibly loss of data,\n");
768 pr_err("corruption or system hangs!\n");
769 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
770 pr_err("which is invalid and requires you to set the proper MAC\n");
771 pr_err("address manually before continuing to enable this network\n");
772 pr_err("device. Please inspect the EEPROM dump and report the\n");
773 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
774 pr_err("/*********************/\n");
775
776 kfree(data);
777}
778
779/**
780 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
781 * @pdev: PCI device information struct
782 *
783 * Return true if an adapter needs ioport resources
784 **/
785static int e1000_is_need_ioport(struct pci_dev *pdev)
786{
787 switch (pdev->device) {
788 case E1000_DEV_ID_82540EM:
789 case E1000_DEV_ID_82540EM_LOM:
790 case E1000_DEV_ID_82540EP:
791 case E1000_DEV_ID_82540EP_LOM:
792 case E1000_DEV_ID_82540EP_LP:
793 case E1000_DEV_ID_82541EI:
794 case E1000_DEV_ID_82541EI_MOBILE:
795 case E1000_DEV_ID_82541ER:
796 case E1000_DEV_ID_82541ER_LOM:
797 case E1000_DEV_ID_82541GI:
798 case E1000_DEV_ID_82541GI_LF:
799 case E1000_DEV_ID_82541GI_MOBILE:
800 case E1000_DEV_ID_82544EI_COPPER:
801 case E1000_DEV_ID_82544EI_FIBER:
802 case E1000_DEV_ID_82544GC_COPPER:
803 case E1000_DEV_ID_82544GC_LOM:
804 case E1000_DEV_ID_82545EM_COPPER:
805 case E1000_DEV_ID_82545EM_FIBER:
806 case E1000_DEV_ID_82546EB_COPPER:
807 case E1000_DEV_ID_82546EB_FIBER:
808 case E1000_DEV_ID_82546EB_QUAD_COPPER:
809 return true;
810 default:
811 return false;
812 }
813}
814
815static netdev_features_t e1000_fix_features(struct net_device *netdev,
816 netdev_features_t features)
817{
818 /* Since there is no support for separate Rx/Tx vlan accel
819 * enable/disable make sure Tx flag is always in same state as Rx.
820 */
821 if (features & NETIF_F_HW_VLAN_CTAG_RX)
822 features |= NETIF_F_HW_VLAN_CTAG_TX;
823 else
824 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
825
826 return features;
827}
828
829static int e1000_set_features(struct net_device *netdev,
830 netdev_features_t features)
831{
832 struct e1000_adapter *adapter = netdev_priv(netdev);
833 netdev_features_t changed = features ^ netdev->features;
834
835 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
836 e1000_vlan_mode(netdev, features);
837
838 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL)))
839 return 0;
840
841 netdev->features = features;
842 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
843
844 if (netif_running(netdev))
845 e1000_reinit_locked(adapter);
846 else
847 e1000_reset(adapter);
848
849 return 0;
850}
851
852static const struct net_device_ops e1000_netdev_ops = {
853 .ndo_open = e1000_open,
854 .ndo_stop = e1000_close,
855 .ndo_start_xmit = e1000_xmit_frame,
856 .ndo_set_rx_mode = e1000_set_rx_mode,
857 .ndo_set_mac_address = e1000_set_mac,
858 .ndo_tx_timeout = e1000_tx_timeout,
859 .ndo_change_mtu = e1000_change_mtu,
860 .ndo_do_ioctl = e1000_ioctl,
861 .ndo_validate_addr = eth_validate_addr,
862 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
863 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
864#ifdef CONFIG_NET_POLL_CONTROLLER
865 .ndo_poll_controller = e1000_netpoll,
866#endif
867 .ndo_fix_features = e1000_fix_features,
868 .ndo_set_features = e1000_set_features,
869};
870
871/**
872 * e1000_init_hw_struct - initialize members of hw struct
873 * @adapter: board private struct
874 * @hw: structure used by e1000_hw.c
875 *
876 * Factors out initialization of the e1000_hw struct to its own function
877 * that can be called very early at init (just after struct allocation).
878 * Fields are initialized based on PCI device information and
879 * OS network device settings (MTU size).
880 * Returns negative error codes if MAC type setup fails.
881 */
882static int e1000_init_hw_struct(struct e1000_adapter *adapter,
883 struct e1000_hw *hw)
884{
885 struct pci_dev *pdev = adapter->pdev;
886
887 /* PCI config space info */
888 hw->vendor_id = pdev->vendor;
889 hw->device_id = pdev->device;
890 hw->subsystem_vendor_id = pdev->subsystem_vendor;
891 hw->subsystem_id = pdev->subsystem_device;
892 hw->revision_id = pdev->revision;
893
894 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
895
896 hw->max_frame_size = adapter->netdev->mtu +
897 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
898 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
899
900 /* identify the MAC */
901 if (e1000_set_mac_type(hw)) {
902 e_err(probe, "Unknown MAC Type\n");
903 return -EIO;
904 }
905
906 switch (hw->mac_type) {
907 default:
908 break;
909 case e1000_82541:
910 case e1000_82547:
911 case e1000_82541_rev_2:
912 case e1000_82547_rev_2:
913 hw->phy_init_script = 1;
914 break;
915 }
916
917 e1000_set_media_type(hw);
918 e1000_get_bus_info(hw);
919
920 hw->wait_autoneg_complete = false;
921 hw->tbi_compatibility_en = true;
922 hw->adaptive_ifs = true;
923
924 /* Copper options */
925
926 if (hw->media_type == e1000_media_type_copper) {
927 hw->mdix = AUTO_ALL_MODES;
928 hw->disable_polarity_correction = false;
929 hw->master_slave = E1000_MASTER_SLAVE;
930 }
931
932 return 0;
933}
934
935/**
936 * e1000_probe - Device Initialization Routine
937 * @pdev: PCI device information struct
938 * @ent: entry in e1000_pci_tbl
939 *
940 * Returns 0 on success, negative on failure
941 *
942 * e1000_probe initializes an adapter identified by a pci_dev structure.
943 * The OS initialization, configuring of the adapter private structure,
944 * and a hardware reset occur.
945 **/
946static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
947{
948 struct net_device *netdev;
949 struct e1000_adapter *adapter = NULL;
950 struct e1000_hw *hw;
951
952 static int cards_found;
953 static int global_quad_port_a; /* global ksp3 port a indication */
954 int i, err, pci_using_dac;
955 u16 eeprom_data = 0;
956 u16 tmp = 0;
957 u16 eeprom_apme_mask = E1000_EEPROM_APME;
958 int bars, need_ioport;
959 bool disable_dev = false;
960
961 /* do not allocate ioport bars when not needed */
962 need_ioport = e1000_is_need_ioport(pdev);
963 if (need_ioport) {
964 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
965 err = pci_enable_device(pdev);
966 } else {
967 bars = pci_select_bars(pdev, IORESOURCE_MEM);
968 err = pci_enable_device_mem(pdev);
969 }
970 if (err)
971 return err;
972
973 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
974 if (err)
975 goto err_pci_reg;
976
977 pci_set_master(pdev);
978 err = pci_save_state(pdev);
979 if (err)
980 goto err_alloc_etherdev;
981
982 err = -ENOMEM;
983 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
984 if (!netdev)
985 goto err_alloc_etherdev;
986
987 SET_NETDEV_DEV(netdev, &pdev->dev);
988
989 pci_set_drvdata(pdev, netdev);
990 adapter = netdev_priv(netdev);
991 adapter->netdev = netdev;
992 adapter->pdev = pdev;
993 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
994 adapter->bars = bars;
995 adapter->need_ioport = need_ioport;
996
997 hw = &adapter->hw;
998 hw->back = adapter;
999
1000 err = -EIO;
1001 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
1002 if (!hw->hw_addr)
1003 goto err_ioremap;
1004
1005 if (adapter->need_ioport) {
1006 for (i = BAR_1; i <= BAR_5; i++) {
1007 if (pci_resource_len(pdev, i) == 0)
1008 continue;
1009 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1010 hw->io_base = pci_resource_start(pdev, i);
1011 break;
1012 }
1013 }
1014 }
1015
1016 /* make ready for any if (hw->...) below */
1017 err = e1000_init_hw_struct(adapter, hw);
1018 if (err)
1019 goto err_sw_init;
1020
1021 /* there is a workaround being applied below that limits
1022 * 64-bit DMA addresses to 64-bit hardware. There are some
1023 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1024 */
1025 pci_using_dac = 0;
1026 if ((hw->bus_type == e1000_bus_type_pcix) &&
1027 !dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
1028 pci_using_dac = 1;
1029 } else {
1030 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1031 if (err) {
1032 pr_err("No usable DMA config, aborting\n");
1033 goto err_dma;
1034 }
1035 }
1036
1037 netdev->netdev_ops = &e1000_netdev_ops;
1038 e1000_set_ethtool_ops(netdev);
1039 netdev->watchdog_timeo = 5 * HZ;
1040 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1041
1042 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1043
1044 adapter->bd_number = cards_found;
1045
1046 /* setup the private structure */
1047
1048 err = e1000_sw_init(adapter);
1049 if (err)
1050 goto err_sw_init;
1051
1052 err = -EIO;
1053 if (hw->mac_type == e1000_ce4100) {
1054 hw->ce4100_gbe_mdio_base_virt =
1055 ioremap(pci_resource_start(pdev, BAR_1),
1056 pci_resource_len(pdev, BAR_1));
1057
1058 if (!hw->ce4100_gbe_mdio_base_virt)
1059 goto err_mdio_ioremap;
1060 }
1061
1062 if (hw->mac_type >= e1000_82543) {
1063 netdev->hw_features = NETIF_F_SG |
1064 NETIF_F_HW_CSUM |
1065 NETIF_F_HW_VLAN_CTAG_RX;
1066 netdev->features = NETIF_F_HW_VLAN_CTAG_TX |
1067 NETIF_F_HW_VLAN_CTAG_FILTER;
1068 }
1069
1070 if ((hw->mac_type >= e1000_82544) &&
1071 (hw->mac_type != e1000_82547))
1072 netdev->hw_features |= NETIF_F_TSO;
1073
1074 netdev->priv_flags |= IFF_SUPP_NOFCS;
1075
1076 netdev->features |= netdev->hw_features;
1077 netdev->hw_features |= (NETIF_F_RXCSUM |
1078 NETIF_F_RXALL |
1079 NETIF_F_RXFCS);
1080
1081 if (pci_using_dac) {
1082 netdev->features |= NETIF_F_HIGHDMA;
1083 netdev->vlan_features |= NETIF_F_HIGHDMA;
1084 }
1085
1086 netdev->vlan_features |= (NETIF_F_TSO |
1087 NETIF_F_HW_CSUM |
1088 NETIF_F_SG);
1089
1090 /* Do not set IFF_UNICAST_FLT for VMWare's 82545EM */
1091 if (hw->device_id != E1000_DEV_ID_82545EM_COPPER ||
1092 hw->subsystem_vendor_id != PCI_VENDOR_ID_VMWARE)
1093 netdev->priv_flags |= IFF_UNICAST_FLT;
1094
1095 /* MTU range: 46 - 16110 */
1096 netdev->min_mtu = ETH_ZLEN - ETH_HLEN;
1097 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
1098
1099 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1100
1101 /* initialize eeprom parameters */
1102 if (e1000_init_eeprom_params(hw)) {
1103 e_err(probe, "EEPROM initialization failed\n");
1104 goto err_eeprom;
1105 }
1106
1107 /* before reading the EEPROM, reset the controller to
1108 * put the device in a known good starting state
1109 */
1110
1111 e1000_reset_hw(hw);
1112
1113 /* make sure the EEPROM is good */
1114 if (e1000_validate_eeprom_checksum(hw) < 0) {
1115 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1116 e1000_dump_eeprom(adapter);
1117 /* set MAC address to all zeroes to invalidate and temporary
1118 * disable this device for the user. This blocks regular
1119 * traffic while still permitting ethtool ioctls from reaching
1120 * the hardware as well as allowing the user to run the
1121 * interface after manually setting a hw addr using
1122 * `ip set address`
1123 */
1124 memset(hw->mac_addr, 0, netdev->addr_len);
1125 } else {
1126 /* copy the MAC address out of the EEPROM */
1127 if (e1000_read_mac_addr(hw))
1128 e_err(probe, "EEPROM Read Error\n");
1129 }
1130 /* don't block initialization here due to bad MAC address */
1131 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1132
1133 if (!is_valid_ether_addr(netdev->dev_addr))
1134 e_err(probe, "Invalid MAC Address\n");
1135
1136
1137 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1138 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1139 e1000_82547_tx_fifo_stall_task);
1140 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1141 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1142
1143 e1000_check_options(adapter);
1144
1145 /* Initial Wake on LAN setting
1146 * If APM wake is enabled in the EEPROM,
1147 * enable the ACPI Magic Packet filter
1148 */
1149
1150 switch (hw->mac_type) {
1151 case e1000_82542_rev2_0:
1152 case e1000_82542_rev2_1:
1153 case e1000_82543:
1154 break;
1155 case e1000_82544:
1156 e1000_read_eeprom(hw,
1157 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1158 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1159 break;
1160 case e1000_82546:
1161 case e1000_82546_rev_3:
1162 if (er32(STATUS) & E1000_STATUS_FUNC_1) {
1163 e1000_read_eeprom(hw,
1164 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1165 break;
1166 }
1167 /* Fall Through */
1168 default:
1169 e1000_read_eeprom(hw,
1170 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1171 break;
1172 }
1173 if (eeprom_data & eeprom_apme_mask)
1174 adapter->eeprom_wol |= E1000_WUFC_MAG;
1175
1176 /* now that we have the eeprom settings, apply the special cases
1177 * where the eeprom may be wrong or the board simply won't support
1178 * wake on lan on a particular port
1179 */
1180 switch (pdev->device) {
1181 case E1000_DEV_ID_82546GB_PCIE:
1182 adapter->eeprom_wol = 0;
1183 break;
1184 case E1000_DEV_ID_82546EB_FIBER:
1185 case E1000_DEV_ID_82546GB_FIBER:
1186 /* Wake events only supported on port A for dual fiber
1187 * regardless of eeprom setting
1188 */
1189 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1190 adapter->eeprom_wol = 0;
1191 break;
1192 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1193 /* if quad port adapter, disable WoL on all but port A */
1194 if (global_quad_port_a != 0)
1195 adapter->eeprom_wol = 0;
1196 else
1197 adapter->quad_port_a = true;
1198 /* Reset for multiple quad port adapters */
1199 if (++global_quad_port_a == 4)
1200 global_quad_port_a = 0;
1201 break;
1202 }
1203
1204 /* initialize the wol settings based on the eeprom settings */
1205 adapter->wol = adapter->eeprom_wol;
1206 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1207
1208 /* Auto detect PHY address */
1209 if (hw->mac_type == e1000_ce4100) {
1210 for (i = 0; i < 32; i++) {
1211 hw->phy_addr = i;
1212 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1213
1214 if (tmp != 0 && tmp != 0xFF)
1215 break;
1216 }
1217
1218 if (i >= 32)
1219 goto err_eeprom;
1220 }
1221
1222 /* reset the hardware with the new settings */
1223 e1000_reset(adapter);
1224
1225 strcpy(netdev->name, "eth%d");
1226 err = register_netdev(netdev);
1227 if (err)
1228 goto err_register;
1229
1230 e1000_vlan_filter_on_off(adapter, false);
1231
1232 /* print bus type/speed/width info */
1233 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1234 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1235 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1236 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1237 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1238 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1239 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1240 netdev->dev_addr);
1241
1242 /* carrier off reporting is important to ethtool even BEFORE open */
1243 netif_carrier_off(netdev);
1244
1245 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1246
1247 cards_found++;
1248 return 0;
1249
1250err_register:
1251err_eeprom:
1252 e1000_phy_hw_reset(hw);
1253
1254 if (hw->flash_address)
1255 iounmap(hw->flash_address);
1256 kfree(adapter->tx_ring);
1257 kfree(adapter->rx_ring);
1258err_dma:
1259err_sw_init:
1260err_mdio_ioremap:
1261 iounmap(hw->ce4100_gbe_mdio_base_virt);
1262 iounmap(hw->hw_addr);
1263err_ioremap:
1264 disable_dev = !test_and_set_bit(__E1000_DISABLED, &adapter->flags);
1265 free_netdev(netdev);
1266err_alloc_etherdev:
1267 pci_release_selected_regions(pdev, bars);
1268err_pci_reg:
1269 if (!adapter || disable_dev)
1270 pci_disable_device(pdev);
1271 return err;
1272}
1273
1274/**
1275 * e1000_remove - Device Removal Routine
1276 * @pdev: PCI device information struct
1277 *
1278 * e1000_remove is called by the PCI subsystem to alert the driver
1279 * that it should release a PCI device. That could be caused by a
1280 * Hot-Plug event, or because the driver is going to be removed from
1281 * memory.
1282 **/
1283static void e1000_remove(struct pci_dev *pdev)
1284{
1285 struct net_device *netdev = pci_get_drvdata(pdev);
1286 struct e1000_adapter *adapter = netdev_priv(netdev);
1287 struct e1000_hw *hw = &adapter->hw;
1288 bool disable_dev;
1289
1290 e1000_down_and_stop(adapter);
1291 e1000_release_manageability(adapter);
1292
1293 unregister_netdev(netdev);
1294
1295 e1000_phy_hw_reset(hw);
1296
1297 kfree(adapter->tx_ring);
1298 kfree(adapter->rx_ring);
1299
1300 if (hw->mac_type == e1000_ce4100)
1301 iounmap(hw->ce4100_gbe_mdio_base_virt);
1302 iounmap(hw->hw_addr);
1303 if (hw->flash_address)
1304 iounmap(hw->flash_address);
1305 pci_release_selected_regions(pdev, adapter->bars);
1306
1307 disable_dev = !test_and_set_bit(__E1000_DISABLED, &adapter->flags);
1308 free_netdev(netdev);
1309
1310 if (disable_dev)
1311 pci_disable_device(pdev);
1312}
1313
1314/**
1315 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1316 * @adapter: board private structure to initialize
1317 *
1318 * e1000_sw_init initializes the Adapter private data structure.
1319 * e1000_init_hw_struct MUST be called before this function
1320 **/
1321static int e1000_sw_init(struct e1000_adapter *adapter)
1322{
1323 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1324
1325 adapter->num_tx_queues = 1;
1326 adapter->num_rx_queues = 1;
1327
1328 if (e1000_alloc_queues(adapter)) {
1329 e_err(probe, "Unable to allocate memory for queues\n");
1330 return -ENOMEM;
1331 }
1332
1333 /* Explicitly disable IRQ since the NIC can be in any state. */
1334 e1000_irq_disable(adapter);
1335
1336 spin_lock_init(&adapter->stats_lock);
1337
1338 set_bit(__E1000_DOWN, &adapter->flags);
1339
1340 return 0;
1341}
1342
1343/**
1344 * e1000_alloc_queues - Allocate memory for all rings
1345 * @adapter: board private structure to initialize
1346 *
1347 * We allocate one ring per queue at run-time since we don't know the
1348 * number of queues at compile-time.
1349 **/
1350static int e1000_alloc_queues(struct e1000_adapter *adapter)
1351{
1352 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1353 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1354 if (!adapter->tx_ring)
1355 return -ENOMEM;
1356
1357 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1358 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1359 if (!adapter->rx_ring) {
1360 kfree(adapter->tx_ring);
1361 return -ENOMEM;
1362 }
1363
1364 return E1000_SUCCESS;
1365}
1366
1367/**
1368 * e1000_open - Called when a network interface is made active
1369 * @netdev: network interface device structure
1370 *
1371 * Returns 0 on success, negative value on failure
1372 *
1373 * The open entry point is called when a network interface is made
1374 * active by the system (IFF_UP). At this point all resources needed
1375 * for transmit and receive operations are allocated, the interrupt
1376 * handler is registered with the OS, the watchdog task is started,
1377 * and the stack is notified that the interface is ready.
1378 **/
1379int e1000_open(struct net_device *netdev)
1380{
1381 struct e1000_adapter *adapter = netdev_priv(netdev);
1382 struct e1000_hw *hw = &adapter->hw;
1383 int err;
1384
1385 /* disallow open during test */
1386 if (test_bit(__E1000_TESTING, &adapter->flags))
1387 return -EBUSY;
1388
1389 netif_carrier_off(netdev);
1390
1391 /* allocate transmit descriptors */
1392 err = e1000_setup_all_tx_resources(adapter);
1393 if (err)
1394 goto err_setup_tx;
1395
1396 /* allocate receive descriptors */
1397 err = e1000_setup_all_rx_resources(adapter);
1398 if (err)
1399 goto err_setup_rx;
1400
1401 e1000_power_up_phy(adapter);
1402
1403 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1404 if ((hw->mng_cookie.status &
1405 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1406 e1000_update_mng_vlan(adapter);
1407 }
1408
1409 /* before we allocate an interrupt, we must be ready to handle it.
1410 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1411 * as soon as we call pci_request_irq, so we have to setup our
1412 * clean_rx handler before we do so.
1413 */
1414 e1000_configure(adapter);
1415
1416 err = e1000_request_irq(adapter);
1417 if (err)
1418 goto err_req_irq;
1419
1420 /* From here on the code is the same as e1000_up() */
1421 clear_bit(__E1000_DOWN, &adapter->flags);
1422
1423 napi_enable(&adapter->napi);
1424
1425 e1000_irq_enable(adapter);
1426
1427 netif_start_queue(netdev);
1428
1429 /* fire a link status change interrupt to start the watchdog */
1430 ew32(ICS, E1000_ICS_LSC);
1431
1432 return E1000_SUCCESS;
1433
1434err_req_irq:
1435 e1000_power_down_phy(adapter);
1436 e1000_free_all_rx_resources(adapter);
1437err_setup_rx:
1438 e1000_free_all_tx_resources(adapter);
1439err_setup_tx:
1440 e1000_reset(adapter);
1441
1442 return err;
1443}
1444
1445/**
1446 * e1000_close - Disables a network interface
1447 * @netdev: network interface device structure
1448 *
1449 * Returns 0, this is not allowed to fail
1450 *
1451 * The close entry point is called when an interface is de-activated
1452 * by the OS. The hardware is still under the drivers control, but
1453 * needs to be disabled. A global MAC reset is issued to stop the
1454 * hardware, and all transmit and receive resources are freed.
1455 **/
1456int e1000_close(struct net_device *netdev)
1457{
1458 struct e1000_adapter *adapter = netdev_priv(netdev);
1459 struct e1000_hw *hw = &adapter->hw;
1460 int count = E1000_CHECK_RESET_COUNT;
1461
1462 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
1463 usleep_range(10000, 20000);
1464
1465 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1466 e1000_down(adapter);
1467 e1000_power_down_phy(adapter);
1468 e1000_free_irq(adapter);
1469
1470 e1000_free_all_tx_resources(adapter);
1471 e1000_free_all_rx_resources(adapter);
1472
1473 /* kill manageability vlan ID if supported, but not if a vlan with
1474 * the same ID is registered on the host OS (let 8021q kill it)
1475 */
1476 if ((hw->mng_cookie.status &
1477 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1478 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1479 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
1480 adapter->mng_vlan_id);
1481 }
1482
1483 return 0;
1484}
1485
1486/**
1487 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1488 * @adapter: address of board private structure
1489 * @start: address of beginning of memory
1490 * @len: length of memory
1491 **/
1492static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1493 unsigned long len)
1494{
1495 struct e1000_hw *hw = &adapter->hw;
1496 unsigned long begin = (unsigned long)start;
1497 unsigned long end = begin + len;
1498
1499 /* First rev 82545 and 82546 need to not allow any memory
1500 * write location to cross 64k boundary due to errata 23
1501 */
1502 if (hw->mac_type == e1000_82545 ||
1503 hw->mac_type == e1000_ce4100 ||
1504 hw->mac_type == e1000_82546) {
1505 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1506 }
1507
1508 return true;
1509}
1510
1511/**
1512 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1513 * @adapter: board private structure
1514 * @txdr: tx descriptor ring (for a specific queue) to setup
1515 *
1516 * Return 0 on success, negative on failure
1517 **/
1518static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1519 struct e1000_tx_ring *txdr)
1520{
1521 struct pci_dev *pdev = adapter->pdev;
1522 int size;
1523
1524 size = sizeof(struct e1000_tx_buffer) * txdr->count;
1525 txdr->buffer_info = vzalloc(size);
1526 if (!txdr->buffer_info)
1527 return -ENOMEM;
1528
1529 /* round up to nearest 4K */
1530
1531 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1532 txdr->size = ALIGN(txdr->size, 4096);
1533
1534 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1535 GFP_KERNEL);
1536 if (!txdr->desc) {
1537setup_tx_desc_die:
1538 vfree(txdr->buffer_info);
1539 return -ENOMEM;
1540 }
1541
1542 /* Fix for errata 23, can't cross 64kB boundary */
1543 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1544 void *olddesc = txdr->desc;
1545 dma_addr_t olddma = txdr->dma;
1546 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1547 txdr->size, txdr->desc);
1548 /* Try again, without freeing the previous */
1549 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1550 &txdr->dma, GFP_KERNEL);
1551 /* Failed allocation, critical failure */
1552 if (!txdr->desc) {
1553 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1554 olddma);
1555 goto setup_tx_desc_die;
1556 }
1557
1558 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1559 /* give up */
1560 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1561 txdr->dma);
1562 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1563 olddma);
1564 e_err(probe, "Unable to allocate aligned memory "
1565 "for the transmit descriptor ring\n");
1566 vfree(txdr->buffer_info);
1567 return -ENOMEM;
1568 } else {
1569 /* Free old allocation, new allocation was successful */
1570 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1571 olddma);
1572 }
1573 }
1574 memset(txdr->desc, 0, txdr->size);
1575
1576 txdr->next_to_use = 0;
1577 txdr->next_to_clean = 0;
1578
1579 return 0;
1580}
1581
1582/**
1583 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1584 * (Descriptors) for all queues
1585 * @adapter: board private structure
1586 *
1587 * Return 0 on success, negative on failure
1588 **/
1589int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1590{
1591 int i, err = 0;
1592
1593 for (i = 0; i < adapter->num_tx_queues; i++) {
1594 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1595 if (err) {
1596 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1597 for (i-- ; i >= 0; i--)
1598 e1000_free_tx_resources(adapter,
1599 &adapter->tx_ring[i]);
1600 break;
1601 }
1602 }
1603
1604 return err;
1605}
1606
1607/**
1608 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1609 * @adapter: board private structure
1610 *
1611 * Configure the Tx unit of the MAC after a reset.
1612 **/
1613static void e1000_configure_tx(struct e1000_adapter *adapter)
1614{
1615 u64 tdba;
1616 struct e1000_hw *hw = &adapter->hw;
1617 u32 tdlen, tctl, tipg;
1618 u32 ipgr1, ipgr2;
1619
1620 /* Setup the HW Tx Head and Tail descriptor pointers */
1621
1622 switch (adapter->num_tx_queues) {
1623 case 1:
1624 default:
1625 tdba = adapter->tx_ring[0].dma;
1626 tdlen = adapter->tx_ring[0].count *
1627 sizeof(struct e1000_tx_desc);
1628 ew32(TDLEN, tdlen);
1629 ew32(TDBAH, (tdba >> 32));
1630 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1631 ew32(TDT, 0);
1632 ew32(TDH, 0);
1633 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ?
1634 E1000_TDH : E1000_82542_TDH);
1635 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ?
1636 E1000_TDT : E1000_82542_TDT);
1637 break;
1638 }
1639
1640 /* Set the default values for the Tx Inter Packet Gap timer */
1641 if ((hw->media_type == e1000_media_type_fiber ||
1642 hw->media_type == e1000_media_type_internal_serdes))
1643 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1644 else
1645 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1646
1647 switch (hw->mac_type) {
1648 case e1000_82542_rev2_0:
1649 case e1000_82542_rev2_1:
1650 tipg = DEFAULT_82542_TIPG_IPGT;
1651 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1652 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1653 break;
1654 default:
1655 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1656 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1657 break;
1658 }
1659 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1660 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1661 ew32(TIPG, tipg);
1662
1663 /* Set the Tx Interrupt Delay register */
1664
1665 ew32(TIDV, adapter->tx_int_delay);
1666 if (hw->mac_type >= e1000_82540)
1667 ew32(TADV, adapter->tx_abs_int_delay);
1668
1669 /* Program the Transmit Control Register */
1670
1671 tctl = er32(TCTL);
1672 tctl &= ~E1000_TCTL_CT;
1673 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1674 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1675
1676 e1000_config_collision_dist(hw);
1677
1678 /* Setup Transmit Descriptor Settings for eop descriptor */
1679 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1680
1681 /* only set IDE if we are delaying interrupts using the timers */
1682 if (adapter->tx_int_delay)
1683 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1684
1685 if (hw->mac_type < e1000_82543)
1686 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1687 else
1688 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1689
1690 /* Cache if we're 82544 running in PCI-X because we'll
1691 * need this to apply a workaround later in the send path.
1692 */
1693 if (hw->mac_type == e1000_82544 &&
1694 hw->bus_type == e1000_bus_type_pcix)
1695 adapter->pcix_82544 = true;
1696
1697 ew32(TCTL, tctl);
1698
1699}
1700
1701/**
1702 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1703 * @adapter: board private structure
1704 * @rxdr: rx descriptor ring (for a specific queue) to setup
1705 *
1706 * Returns 0 on success, negative on failure
1707 **/
1708static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1709 struct e1000_rx_ring *rxdr)
1710{
1711 struct pci_dev *pdev = adapter->pdev;
1712 int size, desc_len;
1713
1714 size = sizeof(struct e1000_rx_buffer) * rxdr->count;
1715 rxdr->buffer_info = vzalloc(size);
1716 if (!rxdr->buffer_info)
1717 return -ENOMEM;
1718
1719 desc_len = sizeof(struct e1000_rx_desc);
1720
1721 /* Round up to nearest 4K */
1722
1723 rxdr->size = rxdr->count * desc_len;
1724 rxdr->size = ALIGN(rxdr->size, 4096);
1725
1726 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1727 GFP_KERNEL);
1728 if (!rxdr->desc) {
1729setup_rx_desc_die:
1730 vfree(rxdr->buffer_info);
1731 return -ENOMEM;
1732 }
1733
1734 /* Fix for errata 23, can't cross 64kB boundary */
1735 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1736 void *olddesc = rxdr->desc;
1737 dma_addr_t olddma = rxdr->dma;
1738 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1739 rxdr->size, rxdr->desc);
1740 /* Try again, without freeing the previous */
1741 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1742 &rxdr->dma, GFP_KERNEL);
1743 /* Failed allocation, critical failure */
1744 if (!rxdr->desc) {
1745 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1746 olddma);
1747 goto setup_rx_desc_die;
1748 }
1749
1750 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1751 /* give up */
1752 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1753 rxdr->dma);
1754 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1755 olddma);
1756 e_err(probe, "Unable to allocate aligned memory for "
1757 "the Rx descriptor ring\n");
1758 goto setup_rx_desc_die;
1759 } else {
1760 /* Free old allocation, new allocation was successful */
1761 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1762 olddma);
1763 }
1764 }
1765 memset(rxdr->desc, 0, rxdr->size);
1766
1767 rxdr->next_to_clean = 0;
1768 rxdr->next_to_use = 0;
1769 rxdr->rx_skb_top = NULL;
1770
1771 return 0;
1772}
1773
1774/**
1775 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1776 * (Descriptors) for all queues
1777 * @adapter: board private structure
1778 *
1779 * Return 0 on success, negative on failure
1780 **/
1781int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1782{
1783 int i, err = 0;
1784
1785 for (i = 0; i < adapter->num_rx_queues; i++) {
1786 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1787 if (err) {
1788 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1789 for (i-- ; i >= 0; i--)
1790 e1000_free_rx_resources(adapter,
1791 &adapter->rx_ring[i]);
1792 break;
1793 }
1794 }
1795
1796 return err;
1797}
1798
1799/**
1800 * e1000_setup_rctl - configure the receive control registers
1801 * @adapter: Board private structure
1802 **/
1803static void e1000_setup_rctl(struct e1000_adapter *adapter)
1804{
1805 struct e1000_hw *hw = &adapter->hw;
1806 u32 rctl;
1807
1808 rctl = er32(RCTL);
1809
1810 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1811
1812 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1813 E1000_RCTL_RDMTS_HALF |
1814 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1815
1816 if (hw->tbi_compatibility_on == 1)
1817 rctl |= E1000_RCTL_SBP;
1818 else
1819 rctl &= ~E1000_RCTL_SBP;
1820
1821 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1822 rctl &= ~E1000_RCTL_LPE;
1823 else
1824 rctl |= E1000_RCTL_LPE;
1825
1826 /* Setup buffer sizes */
1827 rctl &= ~E1000_RCTL_SZ_4096;
1828 rctl |= E1000_RCTL_BSEX;
1829 switch (adapter->rx_buffer_len) {
1830 case E1000_RXBUFFER_2048:
1831 default:
1832 rctl |= E1000_RCTL_SZ_2048;
1833 rctl &= ~E1000_RCTL_BSEX;
1834 break;
1835 case E1000_RXBUFFER_4096:
1836 rctl |= E1000_RCTL_SZ_4096;
1837 break;
1838 case E1000_RXBUFFER_8192:
1839 rctl |= E1000_RCTL_SZ_8192;
1840 break;
1841 case E1000_RXBUFFER_16384:
1842 rctl |= E1000_RCTL_SZ_16384;
1843 break;
1844 }
1845
1846 /* This is useful for sniffing bad packets. */
1847 if (adapter->netdev->features & NETIF_F_RXALL) {
1848 /* UPE and MPE will be handled by normal PROMISC logic
1849 * in e1000e_set_rx_mode
1850 */
1851 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
1852 E1000_RCTL_BAM | /* RX All Bcast Pkts */
1853 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
1854
1855 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
1856 E1000_RCTL_DPF | /* Allow filtered pause */
1857 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
1858 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1859 * and that breaks VLANs.
1860 */
1861 }
1862
1863 ew32(RCTL, rctl);
1864}
1865
1866/**
1867 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1868 * @adapter: board private structure
1869 *
1870 * Configure the Rx unit of the MAC after a reset.
1871 **/
1872static void e1000_configure_rx(struct e1000_adapter *adapter)
1873{
1874 u64 rdba;
1875 struct e1000_hw *hw = &adapter->hw;
1876 u32 rdlen, rctl, rxcsum;
1877
1878 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1879 rdlen = adapter->rx_ring[0].count *
1880 sizeof(struct e1000_rx_desc);
1881 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1882 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1883 } else {
1884 rdlen = adapter->rx_ring[0].count *
1885 sizeof(struct e1000_rx_desc);
1886 adapter->clean_rx = e1000_clean_rx_irq;
1887 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1888 }
1889
1890 /* disable receives while setting up the descriptors */
1891 rctl = er32(RCTL);
1892 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1893
1894 /* set the Receive Delay Timer Register */
1895 ew32(RDTR, adapter->rx_int_delay);
1896
1897 if (hw->mac_type >= e1000_82540) {
1898 ew32(RADV, adapter->rx_abs_int_delay);
1899 if (adapter->itr_setting != 0)
1900 ew32(ITR, 1000000000 / (adapter->itr * 256));
1901 }
1902
1903 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1904 * the Base and Length of the Rx Descriptor Ring
1905 */
1906 switch (adapter->num_rx_queues) {
1907 case 1:
1908 default:
1909 rdba = adapter->rx_ring[0].dma;
1910 ew32(RDLEN, rdlen);
1911 ew32(RDBAH, (rdba >> 32));
1912 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1913 ew32(RDT, 0);
1914 ew32(RDH, 0);
1915 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ?
1916 E1000_RDH : E1000_82542_RDH);
1917 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ?
1918 E1000_RDT : E1000_82542_RDT);
1919 break;
1920 }
1921
1922 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1923 if (hw->mac_type >= e1000_82543) {
1924 rxcsum = er32(RXCSUM);
1925 if (adapter->rx_csum)
1926 rxcsum |= E1000_RXCSUM_TUOFL;
1927 else
1928 /* don't need to clear IPPCSE as it defaults to 0 */
1929 rxcsum &= ~E1000_RXCSUM_TUOFL;
1930 ew32(RXCSUM, rxcsum);
1931 }
1932
1933 /* Enable Receives */
1934 ew32(RCTL, rctl | E1000_RCTL_EN);
1935}
1936
1937/**
1938 * e1000_free_tx_resources - Free Tx Resources per Queue
1939 * @adapter: board private structure
1940 * @tx_ring: Tx descriptor ring for a specific queue
1941 *
1942 * Free all transmit software resources
1943 **/
1944static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1945 struct e1000_tx_ring *tx_ring)
1946{
1947 struct pci_dev *pdev = adapter->pdev;
1948
1949 e1000_clean_tx_ring(adapter, tx_ring);
1950
1951 vfree(tx_ring->buffer_info);
1952 tx_ring->buffer_info = NULL;
1953
1954 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1955 tx_ring->dma);
1956
1957 tx_ring->desc = NULL;
1958}
1959
1960/**
1961 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1962 * @adapter: board private structure
1963 *
1964 * Free all transmit software resources
1965 **/
1966void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1967{
1968 int i;
1969
1970 for (i = 0; i < adapter->num_tx_queues; i++)
1971 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1972}
1973
1974static void
1975e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1976 struct e1000_tx_buffer *buffer_info)
1977{
1978 if (buffer_info->dma) {
1979 if (buffer_info->mapped_as_page)
1980 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1981 buffer_info->length, DMA_TO_DEVICE);
1982 else
1983 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1984 buffer_info->length,
1985 DMA_TO_DEVICE);
1986 buffer_info->dma = 0;
1987 }
1988 if (buffer_info->skb) {
1989 dev_kfree_skb_any(buffer_info->skb);
1990 buffer_info->skb = NULL;
1991 }
1992 buffer_info->time_stamp = 0;
1993 /* buffer_info must be completely set up in the transmit path */
1994}
1995
1996/**
1997 * e1000_clean_tx_ring - Free Tx Buffers
1998 * @adapter: board private structure
1999 * @tx_ring: ring to be cleaned
2000 **/
2001static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2002 struct e1000_tx_ring *tx_ring)
2003{
2004 struct e1000_hw *hw = &adapter->hw;
2005 struct e1000_tx_buffer *buffer_info;
2006 unsigned long size;
2007 unsigned int i;
2008
2009 /* Free all the Tx ring sk_buffs */
2010
2011 for (i = 0; i < tx_ring->count; i++) {
2012 buffer_info = &tx_ring->buffer_info[i];
2013 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2014 }
2015
2016 netdev_reset_queue(adapter->netdev);
2017 size = sizeof(struct e1000_tx_buffer) * tx_ring->count;
2018 memset(tx_ring->buffer_info, 0, size);
2019
2020 /* Zero out the descriptor ring */
2021
2022 memset(tx_ring->desc, 0, tx_ring->size);
2023
2024 tx_ring->next_to_use = 0;
2025 tx_ring->next_to_clean = 0;
2026 tx_ring->last_tx_tso = false;
2027
2028 writel(0, hw->hw_addr + tx_ring->tdh);
2029 writel(0, hw->hw_addr + tx_ring->tdt);
2030}
2031
2032/**
2033 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2034 * @adapter: board private structure
2035 **/
2036static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2037{
2038 int i;
2039
2040 for (i = 0; i < adapter->num_tx_queues; i++)
2041 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2042}
2043
2044/**
2045 * e1000_free_rx_resources - Free Rx Resources
2046 * @adapter: board private structure
2047 * @rx_ring: ring to clean the resources from
2048 *
2049 * Free all receive software resources
2050 **/
2051static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2052 struct e1000_rx_ring *rx_ring)
2053{
2054 struct pci_dev *pdev = adapter->pdev;
2055
2056 e1000_clean_rx_ring(adapter, rx_ring);
2057
2058 vfree(rx_ring->buffer_info);
2059 rx_ring->buffer_info = NULL;
2060
2061 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2062 rx_ring->dma);
2063
2064 rx_ring->desc = NULL;
2065}
2066
2067/**
2068 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2069 * @adapter: board private structure
2070 *
2071 * Free all receive software resources
2072 **/
2073void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2074{
2075 int i;
2076
2077 for (i = 0; i < adapter->num_rx_queues; i++)
2078 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2079}
2080
2081#define E1000_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)
2082static unsigned int e1000_frag_len(const struct e1000_adapter *a)
2083{
2084 return SKB_DATA_ALIGN(a->rx_buffer_len + E1000_HEADROOM) +
2085 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
2086}
2087
2088static void *e1000_alloc_frag(const struct e1000_adapter *a)
2089{
2090 unsigned int len = e1000_frag_len(a);
2091 u8 *data = netdev_alloc_frag(len);
2092
2093 if (likely(data))
2094 data += E1000_HEADROOM;
2095 return data;
2096}
2097
2098/**
2099 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2100 * @adapter: board private structure
2101 * @rx_ring: ring to free buffers from
2102 **/
2103static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2104 struct e1000_rx_ring *rx_ring)
2105{
2106 struct e1000_hw *hw = &adapter->hw;
2107 struct e1000_rx_buffer *buffer_info;
2108 struct pci_dev *pdev = adapter->pdev;
2109 unsigned long size;
2110 unsigned int i;
2111
2112 /* Free all the Rx netfrags */
2113 for (i = 0; i < rx_ring->count; i++) {
2114 buffer_info = &rx_ring->buffer_info[i];
2115 if (adapter->clean_rx == e1000_clean_rx_irq) {
2116 if (buffer_info->dma)
2117 dma_unmap_single(&pdev->dev, buffer_info->dma,
2118 adapter->rx_buffer_len,
2119 DMA_FROM_DEVICE);
2120 if (buffer_info->rxbuf.data) {
2121 skb_free_frag(buffer_info->rxbuf.data);
2122 buffer_info->rxbuf.data = NULL;
2123 }
2124 } else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2125 if (buffer_info->dma)
2126 dma_unmap_page(&pdev->dev, buffer_info->dma,
2127 adapter->rx_buffer_len,
2128 DMA_FROM_DEVICE);
2129 if (buffer_info->rxbuf.page) {
2130 put_page(buffer_info->rxbuf.page);
2131 buffer_info->rxbuf.page = NULL;
2132 }
2133 }
2134
2135 buffer_info->dma = 0;
2136 }
2137
2138 /* there also may be some cached data from a chained receive */
2139 napi_free_frags(&adapter->napi);
2140 rx_ring->rx_skb_top = NULL;
2141
2142 size = sizeof(struct e1000_rx_buffer) * rx_ring->count;
2143 memset(rx_ring->buffer_info, 0, size);
2144
2145 /* Zero out the descriptor ring */
2146 memset(rx_ring->desc, 0, rx_ring->size);
2147
2148 rx_ring->next_to_clean = 0;
2149 rx_ring->next_to_use = 0;
2150
2151 writel(0, hw->hw_addr + rx_ring->rdh);
2152 writel(0, hw->hw_addr + rx_ring->rdt);
2153}
2154
2155/**
2156 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2157 * @adapter: board private structure
2158 **/
2159static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2160{
2161 int i;
2162
2163 for (i = 0; i < adapter->num_rx_queues; i++)
2164 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2165}
2166
2167/* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2168 * and memory write and invalidate disabled for certain operations
2169 */
2170static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2171{
2172 struct e1000_hw *hw = &adapter->hw;
2173 struct net_device *netdev = adapter->netdev;
2174 u32 rctl;
2175
2176 e1000_pci_clear_mwi(hw);
2177
2178 rctl = er32(RCTL);
2179 rctl |= E1000_RCTL_RST;
2180 ew32(RCTL, rctl);
2181 E1000_WRITE_FLUSH();
2182 mdelay(5);
2183
2184 if (netif_running(netdev))
2185 e1000_clean_all_rx_rings(adapter);
2186}
2187
2188static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2189{
2190 struct e1000_hw *hw = &adapter->hw;
2191 struct net_device *netdev = adapter->netdev;
2192 u32 rctl;
2193
2194 rctl = er32(RCTL);
2195 rctl &= ~E1000_RCTL_RST;
2196 ew32(RCTL, rctl);
2197 E1000_WRITE_FLUSH();
2198 mdelay(5);
2199
2200 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2201 e1000_pci_set_mwi(hw);
2202
2203 if (netif_running(netdev)) {
2204 /* No need to loop, because 82542 supports only 1 queue */
2205 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2206 e1000_configure_rx(adapter);
2207 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2208 }
2209}
2210
2211/**
2212 * e1000_set_mac - Change the Ethernet Address of the NIC
2213 * @netdev: network interface device structure
2214 * @p: pointer to an address structure
2215 *
2216 * Returns 0 on success, negative on failure
2217 **/
2218static int e1000_set_mac(struct net_device *netdev, void *p)
2219{
2220 struct e1000_adapter *adapter = netdev_priv(netdev);
2221 struct e1000_hw *hw = &adapter->hw;
2222 struct sockaddr *addr = p;
2223
2224 if (!is_valid_ether_addr(addr->sa_data))
2225 return -EADDRNOTAVAIL;
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 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2233 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2234
2235 e1000_rar_set(hw, hw->mac_addr, 0);
2236
2237 if (hw->mac_type == e1000_82542_rev2_0)
2238 e1000_leave_82542_rst(adapter);
2239
2240 return 0;
2241}
2242
2243/**
2244 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2245 * @netdev: network interface device structure
2246 *
2247 * The set_rx_mode entry point is called whenever the unicast or multicast
2248 * address lists or the network interface flags are updated. This routine is
2249 * responsible for configuring the hardware for proper unicast, multicast,
2250 * promiscuous mode, and all-multi behavior.
2251 **/
2252static void e1000_set_rx_mode(struct net_device *netdev)
2253{
2254 struct e1000_adapter *adapter = netdev_priv(netdev);
2255 struct e1000_hw *hw = &adapter->hw;
2256 struct netdev_hw_addr *ha;
2257 bool use_uc = false;
2258 u32 rctl;
2259 u32 hash_value;
2260 int i, rar_entries = E1000_RAR_ENTRIES;
2261 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2262 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2263
2264 if (!mcarray)
2265 return;
2266
2267 /* Check for Promiscuous and All Multicast modes */
2268
2269 rctl = er32(RCTL);
2270
2271 if (netdev->flags & IFF_PROMISC) {
2272 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2273 rctl &= ~E1000_RCTL_VFE;
2274 } else {
2275 if (netdev->flags & IFF_ALLMULTI)
2276 rctl |= E1000_RCTL_MPE;
2277 else
2278 rctl &= ~E1000_RCTL_MPE;
2279 /* Enable VLAN filter if there is a VLAN */
2280 if (e1000_vlan_used(adapter))
2281 rctl |= E1000_RCTL_VFE;
2282 }
2283
2284 if (netdev_uc_count(netdev) > rar_entries - 1) {
2285 rctl |= E1000_RCTL_UPE;
2286 } else if (!(netdev->flags & IFF_PROMISC)) {
2287 rctl &= ~E1000_RCTL_UPE;
2288 use_uc = true;
2289 }
2290
2291 ew32(RCTL, rctl);
2292
2293 /* 82542 2.0 needs to be in reset to write receive address registers */
2294
2295 if (hw->mac_type == e1000_82542_rev2_0)
2296 e1000_enter_82542_rst(adapter);
2297
2298 /* load the first 14 addresses into the exact filters 1-14. Unicast
2299 * addresses take precedence to avoid disabling unicast filtering
2300 * when possible.
2301 *
2302 * RAR 0 is used for the station MAC address
2303 * if there are not 14 addresses, go ahead and clear the filters
2304 */
2305 i = 1;
2306 if (use_uc)
2307 netdev_for_each_uc_addr(ha, netdev) {
2308 if (i == rar_entries)
2309 break;
2310 e1000_rar_set(hw, ha->addr, i++);
2311 }
2312
2313 netdev_for_each_mc_addr(ha, netdev) {
2314 if (i == rar_entries) {
2315 /* load any remaining addresses into the hash table */
2316 u32 hash_reg, hash_bit, mta;
2317 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2318 hash_reg = (hash_value >> 5) & 0x7F;
2319 hash_bit = hash_value & 0x1F;
2320 mta = (1 << hash_bit);
2321 mcarray[hash_reg] |= mta;
2322 } else {
2323 e1000_rar_set(hw, ha->addr, i++);
2324 }
2325 }
2326
2327 for (; i < rar_entries; i++) {
2328 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2329 E1000_WRITE_FLUSH();
2330 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2331 E1000_WRITE_FLUSH();
2332 }
2333
2334 /* write the hash table completely, write from bottom to avoid
2335 * both stupid write combining chipsets, and flushing each write
2336 */
2337 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2338 /* If we are on an 82544 has an errata where writing odd
2339 * offsets overwrites the previous even offset, but writing
2340 * backwards over the range solves the issue by always
2341 * writing the odd offset first
2342 */
2343 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2344 }
2345 E1000_WRITE_FLUSH();
2346
2347 if (hw->mac_type == e1000_82542_rev2_0)
2348 e1000_leave_82542_rst(adapter);
2349
2350 kfree(mcarray);
2351}
2352
2353/**
2354 * e1000_update_phy_info_task - get phy info
2355 * @work: work struct contained inside adapter struct
2356 *
2357 * Need to wait a few seconds after link up to get diagnostic information from
2358 * the phy
2359 */
2360static void e1000_update_phy_info_task(struct work_struct *work)
2361{
2362 struct e1000_adapter *adapter = container_of(work,
2363 struct e1000_adapter,
2364 phy_info_task.work);
2365
2366 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2367}
2368
2369/**
2370 * e1000_82547_tx_fifo_stall_task - task to complete work
2371 * @work: work struct contained inside adapter struct
2372 **/
2373static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2374{
2375 struct e1000_adapter *adapter = container_of(work,
2376 struct e1000_adapter,
2377 fifo_stall_task.work);
2378 struct e1000_hw *hw = &adapter->hw;
2379 struct net_device *netdev = adapter->netdev;
2380 u32 tctl;
2381
2382 if (atomic_read(&adapter->tx_fifo_stall)) {
2383 if ((er32(TDT) == er32(TDH)) &&
2384 (er32(TDFT) == er32(TDFH)) &&
2385 (er32(TDFTS) == er32(TDFHS))) {
2386 tctl = er32(TCTL);
2387 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2388 ew32(TDFT, adapter->tx_head_addr);
2389 ew32(TDFH, adapter->tx_head_addr);
2390 ew32(TDFTS, adapter->tx_head_addr);
2391 ew32(TDFHS, adapter->tx_head_addr);
2392 ew32(TCTL, tctl);
2393 E1000_WRITE_FLUSH();
2394
2395 adapter->tx_fifo_head = 0;
2396 atomic_set(&adapter->tx_fifo_stall, 0);
2397 netif_wake_queue(netdev);
2398 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2399 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2400 }
2401 }
2402}
2403
2404bool e1000_has_link(struct e1000_adapter *adapter)
2405{
2406 struct e1000_hw *hw = &adapter->hw;
2407 bool link_active = false;
2408
2409 /* get_link_status is set on LSC (link status) interrupt or rx
2410 * sequence error interrupt (except on intel ce4100).
2411 * get_link_status will stay false until the
2412 * e1000_check_for_link establishes link for copper adapters
2413 * ONLY
2414 */
2415 switch (hw->media_type) {
2416 case e1000_media_type_copper:
2417 if (hw->mac_type == e1000_ce4100)
2418 hw->get_link_status = 1;
2419 if (hw->get_link_status) {
2420 e1000_check_for_link(hw);
2421 link_active = !hw->get_link_status;
2422 } else {
2423 link_active = true;
2424 }
2425 break;
2426 case e1000_media_type_fiber:
2427 e1000_check_for_link(hw);
2428 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2429 break;
2430 case e1000_media_type_internal_serdes:
2431 e1000_check_for_link(hw);
2432 link_active = hw->serdes_has_link;
2433 break;
2434 default:
2435 break;
2436 }
2437
2438 return link_active;
2439}
2440
2441/**
2442 * e1000_watchdog - work function
2443 * @work: work struct contained inside adapter struct
2444 **/
2445static void e1000_watchdog(struct work_struct *work)
2446{
2447 struct e1000_adapter *adapter = container_of(work,
2448 struct e1000_adapter,
2449 watchdog_task.work);
2450 struct e1000_hw *hw = &adapter->hw;
2451 struct net_device *netdev = adapter->netdev;
2452 struct e1000_tx_ring *txdr = adapter->tx_ring;
2453 u32 link, tctl;
2454
2455 link = e1000_has_link(adapter);
2456 if ((netif_carrier_ok(netdev)) && link)
2457 goto link_up;
2458
2459 if (link) {
2460 if (!netif_carrier_ok(netdev)) {
2461 u32 ctrl;
2462 bool txb2b = true;
2463 /* update snapshot of PHY registers on LSC */
2464 e1000_get_speed_and_duplex(hw,
2465 &adapter->link_speed,
2466 &adapter->link_duplex);
2467
2468 ctrl = er32(CTRL);
2469 pr_info("%s NIC Link is Up %d Mbps %s, "
2470 "Flow Control: %s\n",
2471 netdev->name,
2472 adapter->link_speed,
2473 adapter->link_duplex == FULL_DUPLEX ?
2474 "Full Duplex" : "Half Duplex",
2475 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2476 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2477 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2478 E1000_CTRL_TFCE) ? "TX" : "None")));
2479
2480 /* adjust timeout factor according to speed/duplex */
2481 adapter->tx_timeout_factor = 1;
2482 switch (adapter->link_speed) {
2483 case SPEED_10:
2484 txb2b = false;
2485 adapter->tx_timeout_factor = 16;
2486 break;
2487 case SPEED_100:
2488 txb2b = false;
2489 /* maybe add some timeout factor ? */
2490 break;
2491 }
2492
2493 /* enable transmits in the hardware */
2494 tctl = er32(TCTL);
2495 tctl |= E1000_TCTL_EN;
2496 ew32(TCTL, tctl);
2497
2498 netif_carrier_on(netdev);
2499 if (!test_bit(__E1000_DOWN, &adapter->flags))
2500 schedule_delayed_work(&adapter->phy_info_task,
2501 2 * HZ);
2502 adapter->smartspeed = 0;
2503 }
2504 } else {
2505 if (netif_carrier_ok(netdev)) {
2506 adapter->link_speed = 0;
2507 adapter->link_duplex = 0;
2508 pr_info("%s NIC Link is Down\n",
2509 netdev->name);
2510 netif_carrier_off(netdev);
2511
2512 if (!test_bit(__E1000_DOWN, &adapter->flags))
2513 schedule_delayed_work(&adapter->phy_info_task,
2514 2 * HZ);
2515 }
2516
2517 e1000_smartspeed(adapter);
2518 }
2519
2520link_up:
2521 e1000_update_stats(adapter);
2522
2523 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2524 adapter->tpt_old = adapter->stats.tpt;
2525 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2526 adapter->colc_old = adapter->stats.colc;
2527
2528 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2529 adapter->gorcl_old = adapter->stats.gorcl;
2530 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2531 adapter->gotcl_old = adapter->stats.gotcl;
2532
2533 e1000_update_adaptive(hw);
2534
2535 if (!netif_carrier_ok(netdev)) {
2536 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2537 /* We've lost link, so the controller stops DMA,
2538 * but we've got queued Tx work that's never going
2539 * to get done, so reset controller to flush Tx.
2540 * (Do the reset outside of interrupt context).
2541 */
2542 adapter->tx_timeout_count++;
2543 schedule_work(&adapter->reset_task);
2544 /* exit immediately since reset is imminent */
2545 return;
2546 }
2547 }
2548
2549 /* Simple mode for Interrupt Throttle Rate (ITR) */
2550 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2551 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2552 * Total asymmetrical Tx or Rx gets ITR=8000;
2553 * everyone else is between 2000-8000.
2554 */
2555 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2556 u32 dif = (adapter->gotcl > adapter->gorcl ?
2557 adapter->gotcl - adapter->gorcl :
2558 adapter->gorcl - adapter->gotcl) / 10000;
2559 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2560
2561 ew32(ITR, 1000000000 / (itr * 256));
2562 }
2563
2564 /* Cause software interrupt to ensure rx ring is cleaned */
2565 ew32(ICS, E1000_ICS_RXDMT0);
2566
2567 /* Force detection of hung controller every watchdog period */
2568 adapter->detect_tx_hung = true;
2569
2570 /* Reschedule the task */
2571 if (!test_bit(__E1000_DOWN, &adapter->flags))
2572 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2573}
2574
2575enum latency_range {
2576 lowest_latency = 0,
2577 low_latency = 1,
2578 bulk_latency = 2,
2579 latency_invalid = 255
2580};
2581
2582/**
2583 * e1000_update_itr - update the dynamic ITR value based on statistics
2584 * @adapter: pointer to adapter
2585 * @itr_setting: current adapter->itr
2586 * @packets: the number of packets during this measurement interval
2587 * @bytes: the number of bytes during this measurement interval
2588 *
2589 * Stores a new ITR value based on packets and byte
2590 * counts during the last interrupt. The advantage of per interrupt
2591 * computation is faster updates and more accurate ITR for the current
2592 * traffic pattern. Constants in this function were computed
2593 * based on theoretical maximum wire speed and thresholds were set based
2594 * on testing data as well as attempting to minimize response time
2595 * while increasing bulk throughput.
2596 * this functionality is controlled by the InterruptThrottleRate module
2597 * parameter (see e1000_param.c)
2598 **/
2599static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2600 u16 itr_setting, int packets, int bytes)
2601{
2602 unsigned int retval = itr_setting;
2603 struct e1000_hw *hw = &adapter->hw;
2604
2605 if (unlikely(hw->mac_type < e1000_82540))
2606 goto update_itr_done;
2607
2608 if (packets == 0)
2609 goto update_itr_done;
2610
2611 switch (itr_setting) {
2612 case lowest_latency:
2613 /* jumbo frames get bulk treatment*/
2614 if (bytes/packets > 8000)
2615 retval = bulk_latency;
2616 else if ((packets < 5) && (bytes > 512))
2617 retval = low_latency;
2618 break;
2619 case low_latency: /* 50 usec aka 20000 ints/s */
2620 if (bytes > 10000) {
2621 /* jumbo frames need bulk latency setting */
2622 if (bytes/packets > 8000)
2623 retval = bulk_latency;
2624 else if ((packets < 10) || ((bytes/packets) > 1200))
2625 retval = bulk_latency;
2626 else if ((packets > 35))
2627 retval = lowest_latency;
2628 } else if (bytes/packets > 2000)
2629 retval = bulk_latency;
2630 else if (packets <= 2 && bytes < 512)
2631 retval = lowest_latency;
2632 break;
2633 case bulk_latency: /* 250 usec aka 4000 ints/s */
2634 if (bytes > 25000) {
2635 if (packets > 35)
2636 retval = low_latency;
2637 } else if (bytes < 6000) {
2638 retval = low_latency;
2639 }
2640 break;
2641 }
2642
2643update_itr_done:
2644 return retval;
2645}
2646
2647static void e1000_set_itr(struct e1000_adapter *adapter)
2648{
2649 struct e1000_hw *hw = &adapter->hw;
2650 u16 current_itr;
2651 u32 new_itr = adapter->itr;
2652
2653 if (unlikely(hw->mac_type < e1000_82540))
2654 return;
2655
2656 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2657 if (unlikely(adapter->link_speed != SPEED_1000)) {
2658 current_itr = 0;
2659 new_itr = 4000;
2660 goto set_itr_now;
2661 }
2662
2663 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr,
2664 adapter->total_tx_packets,
2665 adapter->total_tx_bytes);
2666 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2667 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2668 adapter->tx_itr = low_latency;
2669
2670 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr,
2671 adapter->total_rx_packets,
2672 adapter->total_rx_bytes);
2673 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2674 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2675 adapter->rx_itr = low_latency;
2676
2677 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2678
2679 switch (current_itr) {
2680 /* counts and packets in update_itr are dependent on these numbers */
2681 case lowest_latency:
2682 new_itr = 70000;
2683 break;
2684 case low_latency:
2685 new_itr = 20000; /* aka hwitr = ~200 */
2686 break;
2687 case bulk_latency:
2688 new_itr = 4000;
2689 break;
2690 default:
2691 break;
2692 }
2693
2694set_itr_now:
2695 if (new_itr != adapter->itr) {
2696 /* this attempts to bias the interrupt rate towards Bulk
2697 * by adding intermediate steps when interrupt rate is
2698 * increasing
2699 */
2700 new_itr = new_itr > adapter->itr ?
2701 min(adapter->itr + (new_itr >> 2), new_itr) :
2702 new_itr;
2703 adapter->itr = new_itr;
2704 ew32(ITR, 1000000000 / (new_itr * 256));
2705 }
2706}
2707
2708#define E1000_TX_FLAGS_CSUM 0x00000001
2709#define E1000_TX_FLAGS_VLAN 0x00000002
2710#define E1000_TX_FLAGS_TSO 0x00000004
2711#define E1000_TX_FLAGS_IPV4 0x00000008
2712#define E1000_TX_FLAGS_NO_FCS 0x00000010
2713#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2714#define E1000_TX_FLAGS_VLAN_SHIFT 16
2715
2716static int e1000_tso(struct e1000_adapter *adapter,
2717 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2718 __be16 protocol)
2719{
2720 struct e1000_context_desc *context_desc;
2721 struct e1000_tx_buffer *buffer_info;
2722 unsigned int i;
2723 u32 cmd_length = 0;
2724 u16 ipcse = 0, tucse, mss;
2725 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2726
2727 if (skb_is_gso(skb)) {
2728 int err;
2729
2730 err = skb_cow_head(skb, 0);
2731 if (err < 0)
2732 return err;
2733
2734 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2735 mss = skb_shinfo(skb)->gso_size;
2736 if (protocol == htons(ETH_P_IP)) {
2737 struct iphdr *iph = ip_hdr(skb);
2738 iph->tot_len = 0;
2739 iph->check = 0;
2740 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2741 iph->daddr, 0,
2742 IPPROTO_TCP,
2743 0);
2744 cmd_length = E1000_TXD_CMD_IP;
2745 ipcse = skb_transport_offset(skb) - 1;
2746 } else if (skb_is_gso_v6(skb)) {
2747 ipv6_hdr(skb)->payload_len = 0;
2748 tcp_hdr(skb)->check =
2749 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2750 &ipv6_hdr(skb)->daddr,
2751 0, IPPROTO_TCP, 0);
2752 ipcse = 0;
2753 }
2754 ipcss = skb_network_offset(skb);
2755 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2756 tucss = skb_transport_offset(skb);
2757 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2758 tucse = 0;
2759
2760 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2761 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2762
2763 i = tx_ring->next_to_use;
2764 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2765 buffer_info = &tx_ring->buffer_info[i];
2766
2767 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2768 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2769 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2770 context_desc->upper_setup.tcp_fields.tucss = tucss;
2771 context_desc->upper_setup.tcp_fields.tucso = tucso;
2772 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2773 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2774 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2775 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2776
2777 buffer_info->time_stamp = jiffies;
2778 buffer_info->next_to_watch = i;
2779
2780 if (++i == tx_ring->count)
2781 i = 0;
2782
2783 tx_ring->next_to_use = i;
2784
2785 return true;
2786 }
2787 return false;
2788}
2789
2790static bool e1000_tx_csum(struct e1000_adapter *adapter,
2791 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2792 __be16 protocol)
2793{
2794 struct e1000_context_desc *context_desc;
2795 struct e1000_tx_buffer *buffer_info;
2796 unsigned int i;
2797 u8 css;
2798 u32 cmd_len = E1000_TXD_CMD_DEXT;
2799
2800 if (skb->ip_summed != CHECKSUM_PARTIAL)
2801 return false;
2802
2803 switch (protocol) {
2804 case cpu_to_be16(ETH_P_IP):
2805 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2806 cmd_len |= E1000_TXD_CMD_TCP;
2807 break;
2808 case cpu_to_be16(ETH_P_IPV6):
2809 /* XXX not handling all IPV6 headers */
2810 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2811 cmd_len |= E1000_TXD_CMD_TCP;
2812 break;
2813 default:
2814 if (unlikely(net_ratelimit()))
2815 e_warn(drv, "checksum_partial proto=%x!\n",
2816 skb->protocol);
2817 break;
2818 }
2819
2820 css = skb_checksum_start_offset(skb);
2821
2822 i = tx_ring->next_to_use;
2823 buffer_info = &tx_ring->buffer_info[i];
2824 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2825
2826 context_desc->lower_setup.ip_config = 0;
2827 context_desc->upper_setup.tcp_fields.tucss = css;
2828 context_desc->upper_setup.tcp_fields.tucso =
2829 css + skb->csum_offset;
2830 context_desc->upper_setup.tcp_fields.tucse = 0;
2831 context_desc->tcp_seg_setup.data = 0;
2832 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2833
2834 buffer_info->time_stamp = jiffies;
2835 buffer_info->next_to_watch = i;
2836
2837 if (unlikely(++i == tx_ring->count))
2838 i = 0;
2839
2840 tx_ring->next_to_use = i;
2841
2842 return true;
2843}
2844
2845#define E1000_MAX_TXD_PWR 12
2846#define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2847
2848static int e1000_tx_map(struct e1000_adapter *adapter,
2849 struct e1000_tx_ring *tx_ring,
2850 struct sk_buff *skb, unsigned int first,
2851 unsigned int max_per_txd, unsigned int nr_frags,
2852 unsigned int mss)
2853{
2854 struct e1000_hw *hw = &adapter->hw;
2855 struct pci_dev *pdev = adapter->pdev;
2856 struct e1000_tx_buffer *buffer_info;
2857 unsigned int len = skb_headlen(skb);
2858 unsigned int offset = 0, size, count = 0, i;
2859 unsigned int f, bytecount, segs;
2860
2861 i = tx_ring->next_to_use;
2862
2863 while (len) {
2864 buffer_info = &tx_ring->buffer_info[i];
2865 size = min(len, max_per_txd);
2866 /* Workaround for Controller erratum --
2867 * descriptor for non-tso packet in a linear SKB that follows a
2868 * tso gets written back prematurely before the data is fully
2869 * DMA'd to the controller
2870 */
2871 if (!skb->data_len && tx_ring->last_tx_tso &&
2872 !skb_is_gso(skb)) {
2873 tx_ring->last_tx_tso = false;
2874 size -= 4;
2875 }
2876
2877 /* Workaround for premature desc write-backs
2878 * in TSO mode. Append 4-byte sentinel desc
2879 */
2880 if (unlikely(mss && !nr_frags && size == len && size > 8))
2881 size -= 4;
2882 /* work-around for errata 10 and it applies
2883 * to all controllers in PCI-X mode
2884 * The fix is to make sure that the first descriptor of a
2885 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2886 */
2887 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2888 (size > 2015) && count == 0))
2889 size = 2015;
2890
2891 /* Workaround for potential 82544 hang in PCI-X. Avoid
2892 * terminating buffers within evenly-aligned dwords.
2893 */
2894 if (unlikely(adapter->pcix_82544 &&
2895 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2896 size > 4))
2897 size -= 4;
2898
2899 buffer_info->length = size;
2900 /* set time_stamp *before* dma to help avoid a possible race */
2901 buffer_info->time_stamp = jiffies;
2902 buffer_info->mapped_as_page = false;
2903 buffer_info->dma = dma_map_single(&pdev->dev,
2904 skb->data + offset,
2905 size, DMA_TO_DEVICE);
2906 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2907 goto dma_error;
2908 buffer_info->next_to_watch = i;
2909
2910 len -= size;
2911 offset += size;
2912 count++;
2913 if (len) {
2914 i++;
2915 if (unlikely(i == tx_ring->count))
2916 i = 0;
2917 }
2918 }
2919
2920 for (f = 0; f < nr_frags; f++) {
2921 const struct skb_frag_struct *frag;
2922
2923 frag = &skb_shinfo(skb)->frags[f];
2924 len = skb_frag_size(frag);
2925 offset = 0;
2926
2927 while (len) {
2928 unsigned long bufend;
2929 i++;
2930 if (unlikely(i == tx_ring->count))
2931 i = 0;
2932
2933 buffer_info = &tx_ring->buffer_info[i];
2934 size = min(len, max_per_txd);
2935 /* Workaround for premature desc write-backs
2936 * in TSO mode. Append 4-byte sentinel desc
2937 */
2938 if (unlikely(mss && f == (nr_frags-1) &&
2939 size == len && size > 8))
2940 size -= 4;
2941 /* Workaround for potential 82544 hang in PCI-X.
2942 * Avoid terminating buffers within evenly-aligned
2943 * dwords.
2944 */
2945 bufend = (unsigned long)
2946 page_to_phys(skb_frag_page(frag));
2947 bufend += offset + size - 1;
2948 if (unlikely(adapter->pcix_82544 &&
2949 !(bufend & 4) &&
2950 size > 4))
2951 size -= 4;
2952
2953 buffer_info->length = size;
2954 buffer_info->time_stamp = jiffies;
2955 buffer_info->mapped_as_page = true;
2956 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2957 offset, size, DMA_TO_DEVICE);
2958 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2959 goto dma_error;
2960 buffer_info->next_to_watch = i;
2961
2962 len -= size;
2963 offset += size;
2964 count++;
2965 }
2966 }
2967
2968 segs = skb_shinfo(skb)->gso_segs ?: 1;
2969 /* multiply data chunks by size of headers */
2970 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2971
2972 tx_ring->buffer_info[i].skb = skb;
2973 tx_ring->buffer_info[i].segs = segs;
2974 tx_ring->buffer_info[i].bytecount = bytecount;
2975 tx_ring->buffer_info[first].next_to_watch = i;
2976
2977 return count;
2978
2979dma_error:
2980 dev_err(&pdev->dev, "TX DMA map failed\n");
2981 buffer_info->dma = 0;
2982 if (count)
2983 count--;
2984
2985 while (count--) {
2986 if (i == 0)
2987 i += tx_ring->count;
2988 i--;
2989 buffer_info = &tx_ring->buffer_info[i];
2990 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2991 }
2992
2993 return 0;
2994}
2995
2996static void e1000_tx_queue(struct e1000_adapter *adapter,
2997 struct e1000_tx_ring *tx_ring, int tx_flags,
2998 int count)
2999{
3000 struct e1000_tx_desc *tx_desc = NULL;
3001 struct e1000_tx_buffer *buffer_info;
3002 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3003 unsigned int i;
3004
3005 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3006 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3007 E1000_TXD_CMD_TSE;
3008 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3009
3010 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3011 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3012 }
3013
3014 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3015 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3016 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3017 }
3018
3019 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3020 txd_lower |= E1000_TXD_CMD_VLE;
3021 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3022 }
3023
3024 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3025 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3026
3027 i = tx_ring->next_to_use;
3028
3029 while (count--) {
3030 buffer_info = &tx_ring->buffer_info[i];
3031 tx_desc = E1000_TX_DESC(*tx_ring, i);
3032 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3033 tx_desc->lower.data =
3034 cpu_to_le32(txd_lower | buffer_info->length);
3035 tx_desc->upper.data = cpu_to_le32(txd_upper);
3036 if (unlikely(++i == tx_ring->count))
3037 i = 0;
3038 }
3039
3040 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3041
3042 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3043 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3044 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3045
3046 /* Force memory writes to complete before letting h/w
3047 * know there are new descriptors to fetch. (Only
3048 * applicable for weak-ordered memory model archs,
3049 * such as IA-64).
3050 */
3051 wmb();
3052
3053 tx_ring->next_to_use = i;
3054}
3055
3056/* 82547 workaround to avoid controller hang in half-duplex environment.
3057 * The workaround is to avoid queuing a large packet that would span
3058 * the internal Tx FIFO ring boundary by notifying the stack to resend
3059 * the packet at a later time. This gives the Tx FIFO an opportunity to
3060 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3061 * to the beginning of the Tx FIFO.
3062 */
3063
3064#define E1000_FIFO_HDR 0x10
3065#define E1000_82547_PAD_LEN 0x3E0
3066
3067static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3068 struct sk_buff *skb)
3069{
3070 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3071 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3072
3073 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3074
3075 if (adapter->link_duplex != HALF_DUPLEX)
3076 goto no_fifo_stall_required;
3077
3078 if (atomic_read(&adapter->tx_fifo_stall))
3079 return 1;
3080
3081 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3082 atomic_set(&adapter->tx_fifo_stall, 1);
3083 return 1;
3084 }
3085
3086no_fifo_stall_required:
3087 adapter->tx_fifo_head += skb_fifo_len;
3088 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3089 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3090 return 0;
3091}
3092
3093static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3094{
3095 struct e1000_adapter *adapter = netdev_priv(netdev);
3096 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3097
3098 netif_stop_queue(netdev);
3099 /* Herbert's original patch had:
3100 * smp_mb__after_netif_stop_queue();
3101 * but since that doesn't exist yet, just open code it.
3102 */
3103 smp_mb();
3104
3105 /* We need to check again in a case another CPU has just
3106 * made room available.
3107 */
3108 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3109 return -EBUSY;
3110
3111 /* A reprieve! */
3112 netif_start_queue(netdev);
3113 ++adapter->restart_queue;
3114 return 0;
3115}
3116
3117static int e1000_maybe_stop_tx(struct net_device *netdev,
3118 struct e1000_tx_ring *tx_ring, int size)
3119{
3120 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3121 return 0;
3122 return __e1000_maybe_stop_tx(netdev, size);
3123}
3124
3125#define TXD_USE_COUNT(S, X) (((S) + ((1 << (X)) - 1)) >> (X))
3126static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3127 struct net_device *netdev)
3128{
3129 struct e1000_adapter *adapter = netdev_priv(netdev);
3130 struct e1000_hw *hw = &adapter->hw;
3131 struct e1000_tx_ring *tx_ring;
3132 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3133 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3134 unsigned int tx_flags = 0;
3135 unsigned int len = skb_headlen(skb);
3136 unsigned int nr_frags;
3137 unsigned int mss;
3138 int count = 0;
3139 int tso;
3140 unsigned int f;
3141 __be16 protocol = vlan_get_protocol(skb);
3142
3143 /* This goes back to the question of how to logically map a Tx queue
3144 * to a flow. Right now, performance is impacted slightly negatively
3145 * if using multiple Tx queues. If the stack breaks away from a
3146 * single qdisc implementation, we can look at this again.
3147 */
3148 tx_ring = adapter->tx_ring;
3149
3150 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3151 * packets may get corrupted during padding by HW.
3152 * To WA this issue, pad all small packets manually.
3153 */
3154 if (eth_skb_pad(skb))
3155 return NETDEV_TX_OK;
3156
3157 mss = skb_shinfo(skb)->gso_size;
3158 /* The controller does a simple calculation to
3159 * make sure there is enough room in the FIFO before
3160 * initiating the DMA for each buffer. The calc is:
3161 * 4 = ceil(buffer len/mss). To make sure we don't
3162 * overrun the FIFO, adjust the max buffer len if mss
3163 * drops.
3164 */
3165 if (mss) {
3166 u8 hdr_len;
3167 max_per_txd = min(mss << 2, max_per_txd);
3168 max_txd_pwr = fls(max_per_txd) - 1;
3169
3170 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3171 if (skb->data_len && hdr_len == len) {
3172 switch (hw->mac_type) {
3173 unsigned int pull_size;
3174 case e1000_82544:
3175 /* Make sure we have room to chop off 4 bytes,
3176 * and that the end alignment will work out to
3177 * this hardware's requirements
3178 * NOTE: this is a TSO only workaround
3179 * if end byte alignment not correct move us
3180 * into the next dword
3181 */
3182 if ((unsigned long)(skb_tail_pointer(skb) - 1)
3183 & 4)
3184 break;
3185 /* fall through */
3186 pull_size = min((unsigned int)4, skb->data_len);
3187 if (!__pskb_pull_tail(skb, pull_size)) {
3188 e_err(drv, "__pskb_pull_tail "
3189 "failed.\n");
3190 dev_kfree_skb_any(skb);
3191 return NETDEV_TX_OK;
3192 }
3193 len = skb_headlen(skb);
3194 break;
3195 default:
3196 /* do nothing */
3197 break;
3198 }
3199 }
3200 }
3201
3202 /* reserve a descriptor for the offload context */
3203 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3204 count++;
3205 count++;
3206
3207 /* Controller Erratum workaround */
3208 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3209 count++;
3210
3211 count += TXD_USE_COUNT(len, max_txd_pwr);
3212
3213 if (adapter->pcix_82544)
3214 count++;
3215
3216 /* work-around for errata 10 and it applies to all controllers
3217 * in PCI-X mode, so add one more descriptor to the count
3218 */
3219 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3220 (len > 2015)))
3221 count++;
3222
3223 nr_frags = skb_shinfo(skb)->nr_frags;
3224 for (f = 0; f < nr_frags; f++)
3225 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3226 max_txd_pwr);
3227 if (adapter->pcix_82544)
3228 count += nr_frags;
3229
3230 /* need: count + 2 desc gap to keep tail from touching
3231 * head, otherwise try next time
3232 */
3233 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3234 return NETDEV_TX_BUSY;
3235
3236 if (unlikely((hw->mac_type == e1000_82547) &&
3237 (e1000_82547_fifo_workaround(adapter, skb)))) {
3238 netif_stop_queue(netdev);
3239 if (!test_bit(__E1000_DOWN, &adapter->flags))
3240 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3241 return NETDEV_TX_BUSY;
3242 }
3243
3244 if (skb_vlan_tag_present(skb)) {
3245 tx_flags |= E1000_TX_FLAGS_VLAN;
3246 tx_flags |= (skb_vlan_tag_get(skb) <<
3247 E1000_TX_FLAGS_VLAN_SHIFT);
3248 }
3249
3250 first = tx_ring->next_to_use;
3251
3252 tso = e1000_tso(adapter, tx_ring, skb, protocol);
3253 if (tso < 0) {
3254 dev_kfree_skb_any(skb);
3255 return NETDEV_TX_OK;
3256 }
3257
3258 if (likely(tso)) {
3259 if (likely(hw->mac_type != e1000_82544))
3260 tx_ring->last_tx_tso = true;
3261 tx_flags |= E1000_TX_FLAGS_TSO;
3262 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb, protocol)))
3263 tx_flags |= E1000_TX_FLAGS_CSUM;
3264
3265 if (protocol == htons(ETH_P_IP))
3266 tx_flags |= E1000_TX_FLAGS_IPV4;
3267
3268 if (unlikely(skb->no_fcs))
3269 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3270
3271 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3272 nr_frags, mss);
3273
3274 if (count) {
3275 /* The descriptors needed is higher than other Intel drivers
3276 * due to a number of workarounds. The breakdown is below:
3277 * Data descriptors: MAX_SKB_FRAGS + 1
3278 * Context Descriptor: 1
3279 * Keep head from touching tail: 2
3280 * Workarounds: 3
3281 */
3282 int desc_needed = MAX_SKB_FRAGS + 7;
3283
3284 netdev_sent_queue(netdev, skb->len);
3285 skb_tx_timestamp(skb);
3286
3287 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3288
3289 /* 82544 potentially requires twice as many data descriptors
3290 * in order to guarantee buffers don't end on evenly-aligned
3291 * dwords
3292 */
3293 if (adapter->pcix_82544)
3294 desc_needed += MAX_SKB_FRAGS + 1;
3295
3296 /* Make sure there is space in the ring for the next send. */
3297 e1000_maybe_stop_tx(netdev, tx_ring, desc_needed);
3298
3299 if (!skb->xmit_more ||
3300 netif_xmit_stopped(netdev_get_tx_queue(netdev, 0))) {
3301 writel(tx_ring->next_to_use, hw->hw_addr + tx_ring->tdt);
3302 /* we need this if more than one processor can write to
3303 * our tail at a time, it synchronizes IO on IA64/Altix
3304 * systems
3305 */
3306 mmiowb();
3307 }
3308 } else {
3309 dev_kfree_skb_any(skb);
3310 tx_ring->buffer_info[first].time_stamp = 0;
3311 tx_ring->next_to_use = first;
3312 }
3313
3314 return NETDEV_TX_OK;
3315}
3316
3317#define NUM_REGS 38 /* 1 based count */
3318static void e1000_regdump(struct e1000_adapter *adapter)
3319{
3320 struct e1000_hw *hw = &adapter->hw;
3321 u32 regs[NUM_REGS];
3322 u32 *regs_buff = regs;
3323 int i = 0;
3324
3325 static const char * const reg_name[] = {
3326 "CTRL", "STATUS",
3327 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3328 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3329 "TIDV", "TXDCTL", "TADV", "TARC0",
3330 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3331 "TXDCTL1", "TARC1",
3332 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3333 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3334 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3335 };
3336
3337 regs_buff[0] = er32(CTRL);
3338 regs_buff[1] = er32(STATUS);
3339
3340 regs_buff[2] = er32(RCTL);
3341 regs_buff[3] = er32(RDLEN);
3342 regs_buff[4] = er32(RDH);
3343 regs_buff[5] = er32(RDT);
3344 regs_buff[6] = er32(RDTR);
3345
3346 regs_buff[7] = er32(TCTL);
3347 regs_buff[8] = er32(TDBAL);
3348 regs_buff[9] = er32(TDBAH);
3349 regs_buff[10] = er32(TDLEN);
3350 regs_buff[11] = er32(TDH);
3351 regs_buff[12] = er32(TDT);
3352 regs_buff[13] = er32(TIDV);
3353 regs_buff[14] = er32(TXDCTL);
3354 regs_buff[15] = er32(TADV);
3355 regs_buff[16] = er32(TARC0);
3356
3357 regs_buff[17] = er32(TDBAL1);
3358 regs_buff[18] = er32(TDBAH1);
3359 regs_buff[19] = er32(TDLEN1);
3360 regs_buff[20] = er32(TDH1);
3361 regs_buff[21] = er32(TDT1);
3362 regs_buff[22] = er32(TXDCTL1);
3363 regs_buff[23] = er32(TARC1);
3364 regs_buff[24] = er32(CTRL_EXT);
3365 regs_buff[25] = er32(ERT);
3366 regs_buff[26] = er32(RDBAL0);
3367 regs_buff[27] = er32(RDBAH0);
3368 regs_buff[28] = er32(TDFH);
3369 regs_buff[29] = er32(TDFT);
3370 regs_buff[30] = er32(TDFHS);
3371 regs_buff[31] = er32(TDFTS);
3372 regs_buff[32] = er32(TDFPC);
3373 regs_buff[33] = er32(RDFH);
3374 regs_buff[34] = er32(RDFT);
3375 regs_buff[35] = er32(RDFHS);
3376 regs_buff[36] = er32(RDFTS);
3377 regs_buff[37] = er32(RDFPC);
3378
3379 pr_info("Register dump\n");
3380 for (i = 0; i < NUM_REGS; i++)
3381 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3382}
3383
3384/*
3385 * e1000_dump: Print registers, tx ring and rx ring
3386 */
3387static void e1000_dump(struct e1000_adapter *adapter)
3388{
3389 /* this code doesn't handle multiple rings */
3390 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3391 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3392 int i;
3393
3394 if (!netif_msg_hw(adapter))
3395 return;
3396
3397 /* Print Registers */
3398 e1000_regdump(adapter);
3399
3400 /* transmit dump */
3401 pr_info("TX Desc ring0 dump\n");
3402
3403 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3404 *
3405 * Legacy Transmit Descriptor
3406 * +--------------------------------------------------------------+
3407 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3408 * +--------------------------------------------------------------+
3409 * 8 | Special | CSS | Status | CMD | CSO | Length |
3410 * +--------------------------------------------------------------+
3411 * 63 48 47 36 35 32 31 24 23 16 15 0
3412 *
3413 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3414 * 63 48 47 40 39 32 31 16 15 8 7 0
3415 * +----------------------------------------------------------------+
3416 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3417 * +----------------------------------------------------------------+
3418 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3419 * +----------------------------------------------------------------+
3420 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3421 *
3422 * Extended Data Descriptor (DTYP=0x1)
3423 * +----------------------------------------------------------------+
3424 * 0 | Buffer Address [63:0] |
3425 * +----------------------------------------------------------------+
3426 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3427 * +----------------------------------------------------------------+
3428 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3429 */
3430 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3431 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3432
3433 if (!netif_msg_tx_done(adapter))
3434 goto rx_ring_summary;
3435
3436 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3437 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3438 struct e1000_tx_buffer *buffer_info = &tx_ring->buffer_info[i];
3439 struct my_u { __le64 a; __le64 b; };
3440 struct my_u *u = (struct my_u *)tx_desc;
3441 const char *type;
3442
3443 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3444 type = "NTC/U";
3445 else if (i == tx_ring->next_to_use)
3446 type = "NTU";
3447 else if (i == tx_ring->next_to_clean)
3448 type = "NTC";
3449 else
3450 type = "";
3451
3452 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3453 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3454 le64_to_cpu(u->a), le64_to_cpu(u->b),
3455 (u64)buffer_info->dma, buffer_info->length,
3456 buffer_info->next_to_watch,
3457 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3458 }
3459
3460rx_ring_summary:
3461 /* receive dump */
3462 pr_info("\nRX Desc ring dump\n");
3463
3464 /* Legacy Receive Descriptor Format
3465 *
3466 * +-----------------------------------------------------+
3467 * | Buffer Address [63:0] |
3468 * +-----------------------------------------------------+
3469 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3470 * +-----------------------------------------------------+
3471 * 63 48 47 40 39 32 31 16 15 0
3472 */
3473 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3474
3475 if (!netif_msg_rx_status(adapter))
3476 goto exit;
3477
3478 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3479 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3480 struct e1000_rx_buffer *buffer_info = &rx_ring->buffer_info[i];
3481 struct my_u { __le64 a; __le64 b; };
3482 struct my_u *u = (struct my_u *)rx_desc;
3483 const char *type;
3484
3485 if (i == rx_ring->next_to_use)
3486 type = "NTU";
3487 else if (i == rx_ring->next_to_clean)
3488 type = "NTC";
3489 else
3490 type = "";
3491
3492 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3493 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3494 (u64)buffer_info->dma, buffer_info->rxbuf.data, type);
3495 } /* for */
3496
3497 /* dump the descriptor caches */
3498 /* rx */
3499 pr_info("Rx descriptor cache in 64bit format\n");
3500 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3501 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3502 i,
3503 readl(adapter->hw.hw_addr + i+4),
3504 readl(adapter->hw.hw_addr + i),
3505 readl(adapter->hw.hw_addr + i+12),
3506 readl(adapter->hw.hw_addr + i+8));
3507 }
3508 /* tx */
3509 pr_info("Tx descriptor cache in 64bit format\n");
3510 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3511 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3512 i,
3513 readl(adapter->hw.hw_addr + i+4),
3514 readl(adapter->hw.hw_addr + i),
3515 readl(adapter->hw.hw_addr + i+12),
3516 readl(adapter->hw.hw_addr + i+8));
3517 }
3518exit:
3519 return;
3520}
3521
3522/**
3523 * e1000_tx_timeout - Respond to a Tx Hang
3524 * @netdev: network interface device structure
3525 **/
3526static void e1000_tx_timeout(struct net_device *netdev)
3527{
3528 struct e1000_adapter *adapter = netdev_priv(netdev);
3529
3530 /* Do the reset outside of interrupt context */
3531 adapter->tx_timeout_count++;
3532 schedule_work(&adapter->reset_task);
3533}
3534
3535static void e1000_reset_task(struct work_struct *work)
3536{
3537 struct e1000_adapter *adapter =
3538 container_of(work, struct e1000_adapter, reset_task);
3539
3540 e_err(drv, "Reset adapter\n");
3541 e1000_reinit_locked(adapter);
3542}
3543
3544/**
3545 * e1000_change_mtu - Change the Maximum Transfer Unit
3546 * @netdev: network interface device structure
3547 * @new_mtu: new value for maximum frame size
3548 *
3549 * Returns 0 on success, negative on failure
3550 **/
3551static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3552{
3553 struct e1000_adapter *adapter = netdev_priv(netdev);
3554 struct e1000_hw *hw = &adapter->hw;
3555 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3556
3557 /* Adapter-specific max frame size limits. */
3558 switch (hw->mac_type) {
3559 case e1000_undefined ... e1000_82542_rev2_1:
3560 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3561 e_err(probe, "Jumbo Frames not supported.\n");
3562 return -EINVAL;
3563 }
3564 break;
3565 default:
3566 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3567 break;
3568 }
3569
3570 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3571 msleep(1);
3572 /* e1000_down has a dependency on max_frame_size */
3573 hw->max_frame_size = max_frame;
3574 if (netif_running(netdev)) {
3575 /* prevent buffers from being reallocated */
3576 adapter->alloc_rx_buf = e1000_alloc_dummy_rx_buffers;
3577 e1000_down(adapter);
3578 }
3579
3580 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3581 * means we reserve 2 more, this pushes us to allocate from the next
3582 * larger slab size.
3583 * i.e. RXBUFFER_2048 --> size-4096 slab
3584 * however with the new *_jumbo_rx* routines, jumbo receives will use
3585 * fragmented skbs
3586 */
3587
3588 if (max_frame <= E1000_RXBUFFER_2048)
3589 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3590 else
3591#if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3592 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3593#elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3594 adapter->rx_buffer_len = PAGE_SIZE;
3595#endif
3596
3597 /* adjust allocation if LPE protects us, and we aren't using SBP */
3598 if (!hw->tbi_compatibility_on &&
3599 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3600 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3601 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3602
3603 pr_info("%s changing MTU from %d to %d\n",
3604 netdev->name, netdev->mtu, new_mtu);
3605 netdev->mtu = new_mtu;
3606
3607 if (netif_running(netdev))
3608 e1000_up(adapter);
3609 else
3610 e1000_reset(adapter);
3611
3612 clear_bit(__E1000_RESETTING, &adapter->flags);
3613
3614 return 0;
3615}
3616
3617/**
3618 * e1000_update_stats - Update the board statistics counters
3619 * @adapter: board private structure
3620 **/
3621void e1000_update_stats(struct e1000_adapter *adapter)
3622{
3623 struct net_device *netdev = adapter->netdev;
3624 struct e1000_hw *hw = &adapter->hw;
3625 struct pci_dev *pdev = adapter->pdev;
3626 unsigned long flags;
3627 u16 phy_tmp;
3628
3629#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3630
3631 /* Prevent stats update while adapter is being reset, or if the pci
3632 * connection is down.
3633 */
3634 if (adapter->link_speed == 0)
3635 return;
3636 if (pci_channel_offline(pdev))
3637 return;
3638
3639 spin_lock_irqsave(&adapter->stats_lock, flags);
3640
3641 /* these counters are modified from e1000_tbi_adjust_stats,
3642 * called from the interrupt context, so they must only
3643 * be written while holding adapter->stats_lock
3644 */
3645
3646 adapter->stats.crcerrs += er32(CRCERRS);
3647 adapter->stats.gprc += er32(GPRC);
3648 adapter->stats.gorcl += er32(GORCL);
3649 adapter->stats.gorch += er32(GORCH);
3650 adapter->stats.bprc += er32(BPRC);
3651 adapter->stats.mprc += er32(MPRC);
3652 adapter->stats.roc += er32(ROC);
3653
3654 adapter->stats.prc64 += er32(PRC64);
3655 adapter->stats.prc127 += er32(PRC127);
3656 adapter->stats.prc255 += er32(PRC255);
3657 adapter->stats.prc511 += er32(PRC511);
3658 adapter->stats.prc1023 += er32(PRC1023);
3659 adapter->stats.prc1522 += er32(PRC1522);
3660
3661 adapter->stats.symerrs += er32(SYMERRS);
3662 adapter->stats.mpc += er32(MPC);
3663 adapter->stats.scc += er32(SCC);
3664 adapter->stats.ecol += er32(ECOL);
3665 adapter->stats.mcc += er32(MCC);
3666 adapter->stats.latecol += er32(LATECOL);
3667 adapter->stats.dc += er32(DC);
3668 adapter->stats.sec += er32(SEC);
3669 adapter->stats.rlec += er32(RLEC);
3670 adapter->stats.xonrxc += er32(XONRXC);
3671 adapter->stats.xontxc += er32(XONTXC);
3672 adapter->stats.xoffrxc += er32(XOFFRXC);
3673 adapter->stats.xofftxc += er32(XOFFTXC);
3674 adapter->stats.fcruc += er32(FCRUC);
3675 adapter->stats.gptc += er32(GPTC);
3676 adapter->stats.gotcl += er32(GOTCL);
3677 adapter->stats.gotch += er32(GOTCH);
3678 adapter->stats.rnbc += er32(RNBC);
3679 adapter->stats.ruc += er32(RUC);
3680 adapter->stats.rfc += er32(RFC);
3681 adapter->stats.rjc += er32(RJC);
3682 adapter->stats.torl += er32(TORL);
3683 adapter->stats.torh += er32(TORH);
3684 adapter->stats.totl += er32(TOTL);
3685 adapter->stats.toth += er32(TOTH);
3686 adapter->stats.tpr += er32(TPR);
3687
3688 adapter->stats.ptc64 += er32(PTC64);
3689 adapter->stats.ptc127 += er32(PTC127);
3690 adapter->stats.ptc255 += er32(PTC255);
3691 adapter->stats.ptc511 += er32(PTC511);
3692 adapter->stats.ptc1023 += er32(PTC1023);
3693 adapter->stats.ptc1522 += er32(PTC1522);
3694
3695 adapter->stats.mptc += er32(MPTC);
3696 adapter->stats.bptc += er32(BPTC);
3697
3698 /* used for adaptive IFS */
3699
3700 hw->tx_packet_delta = er32(TPT);
3701 adapter->stats.tpt += hw->tx_packet_delta;
3702 hw->collision_delta = er32(COLC);
3703 adapter->stats.colc += hw->collision_delta;
3704
3705 if (hw->mac_type >= e1000_82543) {
3706 adapter->stats.algnerrc += er32(ALGNERRC);
3707 adapter->stats.rxerrc += er32(RXERRC);
3708 adapter->stats.tncrs += er32(TNCRS);
3709 adapter->stats.cexterr += er32(CEXTERR);
3710 adapter->stats.tsctc += er32(TSCTC);
3711 adapter->stats.tsctfc += er32(TSCTFC);
3712 }
3713
3714 /* Fill out the OS statistics structure */
3715 netdev->stats.multicast = adapter->stats.mprc;
3716 netdev->stats.collisions = adapter->stats.colc;
3717
3718 /* Rx Errors */
3719
3720 /* RLEC on some newer hardware can be incorrect so build
3721 * our own version based on RUC and ROC
3722 */
3723 netdev->stats.rx_errors = adapter->stats.rxerrc +
3724 adapter->stats.crcerrs + adapter->stats.algnerrc +
3725 adapter->stats.ruc + adapter->stats.roc +
3726 adapter->stats.cexterr;
3727 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3728 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3729 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3730 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3731 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3732
3733 /* Tx Errors */
3734 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3735 netdev->stats.tx_errors = adapter->stats.txerrc;
3736 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3737 netdev->stats.tx_window_errors = adapter->stats.latecol;
3738 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3739 if (hw->bad_tx_carr_stats_fd &&
3740 adapter->link_duplex == FULL_DUPLEX) {
3741 netdev->stats.tx_carrier_errors = 0;
3742 adapter->stats.tncrs = 0;
3743 }
3744
3745 /* Tx Dropped needs to be maintained elsewhere */
3746
3747 /* Phy Stats */
3748 if (hw->media_type == e1000_media_type_copper) {
3749 if ((adapter->link_speed == SPEED_1000) &&
3750 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3751 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3752 adapter->phy_stats.idle_errors += phy_tmp;
3753 }
3754
3755 if ((hw->mac_type <= e1000_82546) &&
3756 (hw->phy_type == e1000_phy_m88) &&
3757 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3758 adapter->phy_stats.receive_errors += phy_tmp;
3759 }
3760
3761 /* Management Stats */
3762 if (hw->has_smbus) {
3763 adapter->stats.mgptc += er32(MGTPTC);
3764 adapter->stats.mgprc += er32(MGTPRC);
3765 adapter->stats.mgpdc += er32(MGTPDC);
3766 }
3767
3768 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3769}
3770
3771/**
3772 * e1000_intr - Interrupt Handler
3773 * @irq: interrupt number
3774 * @data: pointer to a network interface device structure
3775 **/
3776static irqreturn_t e1000_intr(int irq, void *data)
3777{
3778 struct net_device *netdev = data;
3779 struct e1000_adapter *adapter = netdev_priv(netdev);
3780 struct e1000_hw *hw = &adapter->hw;
3781 u32 icr = er32(ICR);
3782
3783 if (unlikely((!icr)))
3784 return IRQ_NONE; /* Not our interrupt */
3785
3786 /* we might have caused the interrupt, but the above
3787 * read cleared it, and just in case the driver is
3788 * down there is nothing to do so return handled
3789 */
3790 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3791 return IRQ_HANDLED;
3792
3793 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3794 hw->get_link_status = 1;
3795 /* guard against interrupt when we're going down */
3796 if (!test_bit(__E1000_DOWN, &adapter->flags))
3797 schedule_delayed_work(&adapter->watchdog_task, 1);
3798 }
3799
3800 /* disable interrupts, without the synchronize_irq bit */
3801 ew32(IMC, ~0);
3802 E1000_WRITE_FLUSH();
3803
3804 if (likely(napi_schedule_prep(&adapter->napi))) {
3805 adapter->total_tx_bytes = 0;
3806 adapter->total_tx_packets = 0;
3807 adapter->total_rx_bytes = 0;
3808 adapter->total_rx_packets = 0;
3809 __napi_schedule(&adapter->napi);
3810 } else {
3811 /* this really should not happen! if it does it is basically a
3812 * bug, but not a hard error, so enable ints and continue
3813 */
3814 if (!test_bit(__E1000_DOWN, &adapter->flags))
3815 e1000_irq_enable(adapter);
3816 }
3817
3818 return IRQ_HANDLED;
3819}
3820
3821/**
3822 * e1000_clean - NAPI Rx polling callback
3823 * @adapter: board private structure
3824 **/
3825static int e1000_clean(struct napi_struct *napi, int budget)
3826{
3827 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
3828 napi);
3829 int tx_clean_complete = 0, work_done = 0;
3830
3831 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3832
3833 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3834
3835 if (!tx_clean_complete)
3836 work_done = budget;
3837
3838 /* If budget not fully consumed, exit the polling mode */
3839 if (work_done < budget) {
3840 if (likely(adapter->itr_setting & 3))
3841 e1000_set_itr(adapter);
3842 napi_complete_done(napi, work_done);
3843 if (!test_bit(__E1000_DOWN, &adapter->flags))
3844 e1000_irq_enable(adapter);
3845 }
3846
3847 return work_done;
3848}
3849
3850/**
3851 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3852 * @adapter: board private structure
3853 **/
3854static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3855 struct e1000_tx_ring *tx_ring)
3856{
3857 struct e1000_hw *hw = &adapter->hw;
3858 struct net_device *netdev = adapter->netdev;
3859 struct e1000_tx_desc *tx_desc, *eop_desc;
3860 struct e1000_tx_buffer *buffer_info;
3861 unsigned int i, eop;
3862 unsigned int count = 0;
3863 unsigned int total_tx_bytes = 0, total_tx_packets = 0;
3864 unsigned int bytes_compl = 0, pkts_compl = 0;
3865
3866 i = tx_ring->next_to_clean;
3867 eop = tx_ring->buffer_info[i].next_to_watch;
3868 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3869
3870 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3871 (count < tx_ring->count)) {
3872 bool cleaned = false;
3873 dma_rmb(); /* read buffer_info after eop_desc */
3874 for ( ; !cleaned; count++) {
3875 tx_desc = E1000_TX_DESC(*tx_ring, i);
3876 buffer_info = &tx_ring->buffer_info[i];
3877 cleaned = (i == eop);
3878
3879 if (cleaned) {
3880 total_tx_packets += buffer_info->segs;
3881 total_tx_bytes += buffer_info->bytecount;
3882 if (buffer_info->skb) {
3883 bytes_compl += buffer_info->skb->len;
3884 pkts_compl++;
3885 }
3886
3887 }
3888 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3889 tx_desc->upper.data = 0;
3890
3891 if (unlikely(++i == tx_ring->count))
3892 i = 0;
3893 }
3894
3895 eop = tx_ring->buffer_info[i].next_to_watch;
3896 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3897 }
3898
3899 /* Synchronize with E1000_DESC_UNUSED called from e1000_xmit_frame,
3900 * which will reuse the cleaned buffers.
3901 */
3902 smp_store_release(&tx_ring->next_to_clean, i);
3903
3904 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
3905
3906#define TX_WAKE_THRESHOLD 32
3907 if (unlikely(count && netif_carrier_ok(netdev) &&
3908 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3909 /* Make sure that anybody stopping the queue after this
3910 * sees the new next_to_clean.
3911 */
3912 smp_mb();
3913
3914 if (netif_queue_stopped(netdev) &&
3915 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3916 netif_wake_queue(netdev);
3917 ++adapter->restart_queue;
3918 }
3919 }
3920
3921 if (adapter->detect_tx_hung) {
3922 /* Detect a transmit hang in hardware, this serializes the
3923 * check with the clearing of time_stamp and movement of i
3924 */
3925 adapter->detect_tx_hung = false;
3926 if (tx_ring->buffer_info[eop].time_stamp &&
3927 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3928 (adapter->tx_timeout_factor * HZ)) &&
3929 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3930
3931 /* detected Tx unit hang */
3932 e_err(drv, "Detected Tx Unit Hang\n"
3933 " Tx Queue <%lu>\n"
3934 " TDH <%x>\n"
3935 " TDT <%x>\n"
3936 " next_to_use <%x>\n"
3937 " next_to_clean <%x>\n"
3938 "buffer_info[next_to_clean]\n"
3939 " time_stamp <%lx>\n"
3940 " next_to_watch <%x>\n"
3941 " jiffies <%lx>\n"
3942 " next_to_watch.status <%x>\n",
3943 (unsigned long)(tx_ring - adapter->tx_ring),
3944 readl(hw->hw_addr + tx_ring->tdh),
3945 readl(hw->hw_addr + tx_ring->tdt),
3946 tx_ring->next_to_use,
3947 tx_ring->next_to_clean,
3948 tx_ring->buffer_info[eop].time_stamp,
3949 eop,
3950 jiffies,
3951 eop_desc->upper.fields.status);
3952 e1000_dump(adapter);
3953 netif_stop_queue(netdev);
3954 }
3955 }
3956 adapter->total_tx_bytes += total_tx_bytes;
3957 adapter->total_tx_packets += total_tx_packets;
3958 netdev->stats.tx_bytes += total_tx_bytes;
3959 netdev->stats.tx_packets += total_tx_packets;
3960 return count < tx_ring->count;
3961}
3962
3963/**
3964 * e1000_rx_checksum - Receive Checksum Offload for 82543
3965 * @adapter: board private structure
3966 * @status_err: receive descriptor status and error fields
3967 * @csum: receive descriptor csum field
3968 * @sk_buff: socket buffer with received data
3969 **/
3970static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3971 u32 csum, struct sk_buff *skb)
3972{
3973 struct e1000_hw *hw = &adapter->hw;
3974 u16 status = (u16)status_err;
3975 u8 errors = (u8)(status_err >> 24);
3976
3977 skb_checksum_none_assert(skb);
3978
3979 /* 82543 or newer only */
3980 if (unlikely(hw->mac_type < e1000_82543))
3981 return;
3982 /* Ignore Checksum bit is set */
3983 if (unlikely(status & E1000_RXD_STAT_IXSM))
3984 return;
3985 /* TCP/UDP checksum error bit is set */
3986 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3987 /* let the stack verify checksum errors */
3988 adapter->hw_csum_err++;
3989 return;
3990 }
3991 /* TCP/UDP Checksum has not been calculated */
3992 if (!(status & E1000_RXD_STAT_TCPCS))
3993 return;
3994
3995 /* It must be a TCP or UDP packet with a valid checksum */
3996 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3997 /* TCP checksum is good */
3998 skb->ip_summed = CHECKSUM_UNNECESSARY;
3999 }
4000 adapter->hw_csum_good++;
4001}
4002
4003/**
4004 * e1000_consume_page - helper function for jumbo Rx path
4005 **/
4006static void e1000_consume_page(struct e1000_rx_buffer *bi, struct sk_buff *skb,
4007 u16 length)
4008{
4009 bi->rxbuf.page = NULL;
4010 skb->len += length;
4011 skb->data_len += length;
4012 skb->truesize += PAGE_SIZE;
4013}
4014
4015/**
4016 * e1000_receive_skb - helper function to handle rx indications
4017 * @adapter: board private structure
4018 * @status: descriptor status field as written by hardware
4019 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
4020 * @skb: pointer to sk_buff to be indicated to stack
4021 */
4022static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
4023 __le16 vlan, struct sk_buff *skb)
4024{
4025 skb->protocol = eth_type_trans(skb, adapter->netdev);
4026
4027 if (status & E1000_RXD_STAT_VP) {
4028 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4029
4030 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4031 }
4032 napi_gro_receive(&adapter->napi, skb);
4033}
4034
4035/**
4036 * e1000_tbi_adjust_stats
4037 * @hw: Struct containing variables accessed by shared code
4038 * @frame_len: The length of the frame in question
4039 * @mac_addr: The Ethernet destination address of the frame in question
4040 *
4041 * Adjusts the statistic counters when a frame is accepted by TBI_ACCEPT
4042 */
4043static void e1000_tbi_adjust_stats(struct e1000_hw *hw,
4044 struct e1000_hw_stats *stats,
4045 u32 frame_len, const u8 *mac_addr)
4046{
4047 u64 carry_bit;
4048
4049 /* First adjust the frame length. */
4050 frame_len--;
4051 /* We need to adjust the statistics counters, since the hardware
4052 * counters overcount this packet as a CRC error and undercount
4053 * the packet as a good packet
4054 */
4055 /* This packet should not be counted as a CRC error. */
4056 stats->crcerrs--;
4057 /* This packet does count as a Good Packet Received. */
4058 stats->gprc++;
4059
4060 /* Adjust the Good Octets received counters */
4061 carry_bit = 0x80000000 & stats->gorcl;
4062 stats->gorcl += frame_len;
4063 /* If the high bit of Gorcl (the low 32 bits of the Good Octets
4064 * Received Count) was one before the addition,
4065 * AND it is zero after, then we lost the carry out,
4066 * need to add one to Gorch (Good Octets Received Count High).
4067 * This could be simplified if all environments supported
4068 * 64-bit integers.
4069 */
4070 if (carry_bit && ((stats->gorcl & 0x80000000) == 0))
4071 stats->gorch++;
4072 /* Is this a broadcast or multicast? Check broadcast first,
4073 * since the test for a multicast frame will test positive on
4074 * a broadcast frame.
4075 */
4076 if (is_broadcast_ether_addr(mac_addr))
4077 stats->bprc++;
4078 else if (is_multicast_ether_addr(mac_addr))
4079 stats->mprc++;
4080
4081 if (frame_len == hw->max_frame_size) {
4082 /* In this case, the hardware has overcounted the number of
4083 * oversize frames.
4084 */
4085 if (stats->roc > 0)
4086 stats->roc--;
4087 }
4088
4089 /* Adjust the bin counters when the extra byte put the frame in the
4090 * wrong bin. Remember that the frame_len was adjusted above.
4091 */
4092 if (frame_len == 64) {
4093 stats->prc64++;
4094 stats->prc127--;
4095 } else if (frame_len == 127) {
4096 stats->prc127++;
4097 stats->prc255--;
4098 } else if (frame_len == 255) {
4099 stats->prc255++;
4100 stats->prc511--;
4101 } else if (frame_len == 511) {
4102 stats->prc511++;
4103 stats->prc1023--;
4104 } else if (frame_len == 1023) {
4105 stats->prc1023++;
4106 stats->prc1522--;
4107 } else if (frame_len == 1522) {
4108 stats->prc1522++;
4109 }
4110}
4111
4112static bool e1000_tbi_should_accept(struct e1000_adapter *adapter,
4113 u8 status, u8 errors,
4114 u32 length, const u8 *data)
4115{
4116 struct e1000_hw *hw = &adapter->hw;
4117 u8 last_byte = *(data + length - 1);
4118
4119 if (TBI_ACCEPT(hw, status, errors, length, last_byte)) {
4120 unsigned long irq_flags;
4121
4122 spin_lock_irqsave(&adapter->stats_lock, irq_flags);
4123 e1000_tbi_adjust_stats(hw, &adapter->stats, length, data);
4124 spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
4125
4126 return true;
4127 }
4128
4129 return false;
4130}
4131
4132static struct sk_buff *e1000_alloc_rx_skb(struct e1000_adapter *adapter,
4133 unsigned int bufsz)
4134{
4135 struct sk_buff *skb = napi_alloc_skb(&adapter->napi, bufsz);
4136
4137 if (unlikely(!skb))
4138 adapter->alloc_rx_buff_failed++;
4139 return skb;
4140}
4141
4142/**
4143 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4144 * @adapter: board private structure
4145 * @rx_ring: ring to clean
4146 * @work_done: amount of napi work completed this call
4147 * @work_to_do: max amount of work allowed for this call to do
4148 *
4149 * the return value indicates whether actual cleaning was done, there
4150 * is no guarantee that everything was cleaned
4151 */
4152static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4153 struct e1000_rx_ring *rx_ring,
4154 int *work_done, int work_to_do)
4155{
4156 struct net_device *netdev = adapter->netdev;
4157 struct pci_dev *pdev = adapter->pdev;
4158 struct e1000_rx_desc *rx_desc, *next_rxd;
4159 struct e1000_rx_buffer *buffer_info, *next_buffer;
4160 u32 length;
4161 unsigned int i;
4162 int cleaned_count = 0;
4163 bool cleaned = false;
4164 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
4165
4166 i = rx_ring->next_to_clean;
4167 rx_desc = E1000_RX_DESC(*rx_ring, i);
4168 buffer_info = &rx_ring->buffer_info[i];
4169
4170 while (rx_desc->status & E1000_RXD_STAT_DD) {
4171 struct sk_buff *skb;
4172 u8 status;
4173
4174 if (*work_done >= work_to_do)
4175 break;
4176 (*work_done)++;
4177 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
4178
4179 status = rx_desc->status;
4180
4181 if (++i == rx_ring->count)
4182 i = 0;
4183
4184 next_rxd = E1000_RX_DESC(*rx_ring, i);
4185 prefetch(next_rxd);
4186
4187 next_buffer = &rx_ring->buffer_info[i];
4188
4189 cleaned = true;
4190 cleaned_count++;
4191 dma_unmap_page(&pdev->dev, buffer_info->dma,
4192 adapter->rx_buffer_len, DMA_FROM_DEVICE);
4193 buffer_info->dma = 0;
4194
4195 length = le16_to_cpu(rx_desc->length);
4196
4197 /* errors is only valid for DD + EOP descriptors */
4198 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4199 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4200 u8 *mapped = page_address(buffer_info->rxbuf.page);
4201
4202 if (e1000_tbi_should_accept(adapter, status,
4203 rx_desc->errors,
4204 length, mapped)) {
4205 length--;
4206 } else if (netdev->features & NETIF_F_RXALL) {
4207 goto process_skb;
4208 } else {
4209 /* an error means any chain goes out the window
4210 * too
4211 */
4212 if (rx_ring->rx_skb_top)
4213 dev_kfree_skb(rx_ring->rx_skb_top);
4214 rx_ring->rx_skb_top = NULL;
4215 goto next_desc;
4216 }
4217 }
4218
4219#define rxtop rx_ring->rx_skb_top
4220process_skb:
4221 if (!(status & E1000_RXD_STAT_EOP)) {
4222 /* this descriptor is only the beginning (or middle) */
4223 if (!rxtop) {
4224 /* this is the beginning of a chain */
4225 rxtop = napi_get_frags(&adapter->napi);
4226 if (!rxtop)
4227 break;
4228
4229 skb_fill_page_desc(rxtop, 0,
4230 buffer_info->rxbuf.page,
4231 0, length);
4232 } else {
4233 /* this is the middle of a chain */
4234 skb_fill_page_desc(rxtop,
4235 skb_shinfo(rxtop)->nr_frags,
4236 buffer_info->rxbuf.page, 0, length);
4237 }
4238 e1000_consume_page(buffer_info, rxtop, length);
4239 goto next_desc;
4240 } else {
4241 if (rxtop) {
4242 /* end of the chain */
4243 skb_fill_page_desc(rxtop,
4244 skb_shinfo(rxtop)->nr_frags,
4245 buffer_info->rxbuf.page, 0, length);
4246 skb = rxtop;
4247 rxtop = NULL;
4248 e1000_consume_page(buffer_info, skb, length);
4249 } else {
4250 struct page *p;
4251 /* no chain, got EOP, this buf is the packet
4252 * copybreak to save the put_page/alloc_page
4253 */
4254 p = buffer_info->rxbuf.page;
4255 if (length <= copybreak) {
4256 u8 *vaddr;
4257
4258 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4259 length -= 4;
4260 skb = e1000_alloc_rx_skb(adapter,
4261 length);
4262 if (!skb)
4263 break;
4264
4265 vaddr = kmap_atomic(p);
4266 memcpy(skb_tail_pointer(skb), vaddr,
4267 length);
4268 kunmap_atomic(vaddr);
4269 /* re-use the page, so don't erase
4270 * buffer_info->rxbuf.page
4271 */
4272 skb_put(skb, length);
4273 e1000_rx_checksum(adapter,
4274 status | rx_desc->errors << 24,
4275 le16_to_cpu(rx_desc->csum), skb);
4276
4277 total_rx_bytes += skb->len;
4278 total_rx_packets++;
4279
4280 e1000_receive_skb(adapter, status,
4281 rx_desc->special, skb);
4282 goto next_desc;
4283 } else {
4284 skb = napi_get_frags(&adapter->napi);
4285 if (!skb) {
4286 adapter->alloc_rx_buff_failed++;
4287 break;
4288 }
4289 skb_fill_page_desc(skb, 0, p, 0,
4290 length);
4291 e1000_consume_page(buffer_info, skb,
4292 length);
4293 }
4294 }
4295 }
4296
4297 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4298 e1000_rx_checksum(adapter,
4299 (u32)(status) |
4300 ((u32)(rx_desc->errors) << 24),
4301 le16_to_cpu(rx_desc->csum), skb);
4302
4303 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4304 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4305 pskb_trim(skb, skb->len - 4);
4306 total_rx_packets++;
4307
4308 if (status & E1000_RXD_STAT_VP) {
4309 __le16 vlan = rx_desc->special;
4310 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4311
4312 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4313 }
4314
4315 napi_gro_frags(&adapter->napi);
4316
4317next_desc:
4318 rx_desc->status = 0;
4319
4320 /* return some buffers to hardware, one at a time is too slow */
4321 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4322 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4323 cleaned_count = 0;
4324 }
4325
4326 /* use prefetched values */
4327 rx_desc = next_rxd;
4328 buffer_info = next_buffer;
4329 }
4330 rx_ring->next_to_clean = i;
4331
4332 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4333 if (cleaned_count)
4334 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4335
4336 adapter->total_rx_packets += total_rx_packets;
4337 adapter->total_rx_bytes += total_rx_bytes;
4338 netdev->stats.rx_bytes += total_rx_bytes;
4339 netdev->stats.rx_packets += total_rx_packets;
4340 return cleaned;
4341}
4342
4343/* this should improve performance for small packets with large amounts
4344 * of reassembly being done in the stack
4345 */
4346static struct sk_buff *e1000_copybreak(struct e1000_adapter *adapter,
4347 struct e1000_rx_buffer *buffer_info,
4348 u32 length, const void *data)
4349{
4350 struct sk_buff *skb;
4351
4352 if (length > copybreak)
4353 return NULL;
4354
4355 skb = e1000_alloc_rx_skb(adapter, length);
4356 if (!skb)
4357 return NULL;
4358
4359 dma_sync_single_for_cpu(&adapter->pdev->dev, buffer_info->dma,
4360 length, DMA_FROM_DEVICE);
4361
4362 skb_put_data(skb, data, length);
4363
4364 return skb;
4365}
4366
4367/**
4368 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4369 * @adapter: board private structure
4370 * @rx_ring: ring to clean
4371 * @work_done: amount of napi work completed this call
4372 * @work_to_do: max amount of work allowed for this call to do
4373 */
4374static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4375 struct e1000_rx_ring *rx_ring,
4376 int *work_done, int work_to_do)
4377{
4378 struct net_device *netdev = adapter->netdev;
4379 struct pci_dev *pdev = adapter->pdev;
4380 struct e1000_rx_desc *rx_desc, *next_rxd;
4381 struct e1000_rx_buffer *buffer_info, *next_buffer;
4382 u32 length;
4383 unsigned int i;
4384 int cleaned_count = 0;
4385 bool cleaned = false;
4386 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
4387
4388 i = rx_ring->next_to_clean;
4389 rx_desc = E1000_RX_DESC(*rx_ring, i);
4390 buffer_info = &rx_ring->buffer_info[i];
4391
4392 while (rx_desc->status & E1000_RXD_STAT_DD) {
4393 struct sk_buff *skb;
4394 u8 *data;
4395 u8 status;
4396
4397 if (*work_done >= work_to_do)
4398 break;
4399 (*work_done)++;
4400 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
4401
4402 status = rx_desc->status;
4403 length = le16_to_cpu(rx_desc->length);
4404
4405 data = buffer_info->rxbuf.data;
4406 prefetch(data);
4407 skb = e1000_copybreak(adapter, buffer_info, length, data);
4408 if (!skb) {
4409 unsigned int frag_len = e1000_frag_len(adapter);
4410
4411 skb = build_skb(data - E1000_HEADROOM, frag_len);
4412 if (!skb) {
4413 adapter->alloc_rx_buff_failed++;
4414 break;
4415 }
4416
4417 skb_reserve(skb, E1000_HEADROOM);
4418 dma_unmap_single(&pdev->dev, buffer_info->dma,
4419 adapter->rx_buffer_len,
4420 DMA_FROM_DEVICE);
4421 buffer_info->dma = 0;
4422 buffer_info->rxbuf.data = NULL;
4423 }
4424
4425 if (++i == rx_ring->count)
4426 i = 0;
4427
4428 next_rxd = E1000_RX_DESC(*rx_ring, i);
4429 prefetch(next_rxd);
4430
4431 next_buffer = &rx_ring->buffer_info[i];
4432
4433 cleaned = true;
4434 cleaned_count++;
4435
4436 /* !EOP means multiple descriptors were used to store a single
4437 * packet, if thats the case we need to toss it. In fact, we
4438 * to toss every packet with the EOP bit clear and the next
4439 * frame that _does_ have the EOP bit set, as it is by
4440 * definition only a frame fragment
4441 */
4442 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4443 adapter->discarding = true;
4444
4445 if (adapter->discarding) {
4446 /* All receives must fit into a single buffer */
4447 netdev_dbg(netdev, "Receive packet consumed multiple buffers\n");
4448 dev_kfree_skb(skb);
4449 if (status & E1000_RXD_STAT_EOP)
4450 adapter->discarding = false;
4451 goto next_desc;
4452 }
4453
4454 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4455 if (e1000_tbi_should_accept(adapter, status,
4456 rx_desc->errors,
4457 length, data)) {
4458 length--;
4459 } else if (netdev->features & NETIF_F_RXALL) {
4460 goto process_skb;
4461 } else {
4462 dev_kfree_skb(skb);
4463 goto next_desc;
4464 }
4465 }
4466
4467process_skb:
4468 total_rx_bytes += (length - 4); /* don't count FCS */
4469 total_rx_packets++;
4470
4471 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4472 /* adjust length to remove Ethernet CRC, this must be
4473 * done after the TBI_ACCEPT workaround above
4474 */
4475 length -= 4;
4476
4477 if (buffer_info->rxbuf.data == NULL)
4478 skb_put(skb, length);
4479 else /* copybreak skb */
4480 skb_trim(skb, length);
4481
4482 /* Receive Checksum Offload */
4483 e1000_rx_checksum(adapter,
4484 (u32)(status) |
4485 ((u32)(rx_desc->errors) << 24),
4486 le16_to_cpu(rx_desc->csum), skb);
4487
4488 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4489
4490next_desc:
4491 rx_desc->status = 0;
4492
4493 /* return some buffers to hardware, one at a time is too slow */
4494 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4495 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4496 cleaned_count = 0;
4497 }
4498
4499 /* use prefetched values */
4500 rx_desc = next_rxd;
4501 buffer_info = next_buffer;
4502 }
4503 rx_ring->next_to_clean = i;
4504
4505 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4506 if (cleaned_count)
4507 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4508
4509 adapter->total_rx_packets += total_rx_packets;
4510 adapter->total_rx_bytes += total_rx_bytes;
4511 netdev->stats.rx_bytes += total_rx_bytes;
4512 netdev->stats.rx_packets += total_rx_packets;
4513 return cleaned;
4514}
4515
4516/**
4517 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4518 * @adapter: address of board private structure
4519 * @rx_ring: pointer to receive ring structure
4520 * @cleaned_count: number of buffers to allocate this pass
4521 **/
4522static void
4523e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4524 struct e1000_rx_ring *rx_ring, int cleaned_count)
4525{
4526 struct pci_dev *pdev = adapter->pdev;
4527 struct e1000_rx_desc *rx_desc;
4528 struct e1000_rx_buffer *buffer_info;
4529 unsigned int i;
4530
4531 i = rx_ring->next_to_use;
4532 buffer_info = &rx_ring->buffer_info[i];
4533
4534 while (cleaned_count--) {
4535 /* allocate a new page if necessary */
4536 if (!buffer_info->rxbuf.page) {
4537 buffer_info->rxbuf.page = alloc_page(GFP_ATOMIC);
4538 if (unlikely(!buffer_info->rxbuf.page)) {
4539 adapter->alloc_rx_buff_failed++;
4540 break;
4541 }
4542 }
4543
4544 if (!buffer_info->dma) {
4545 buffer_info->dma = dma_map_page(&pdev->dev,
4546 buffer_info->rxbuf.page, 0,
4547 adapter->rx_buffer_len,
4548 DMA_FROM_DEVICE);
4549 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4550 put_page(buffer_info->rxbuf.page);
4551 buffer_info->rxbuf.page = NULL;
4552 buffer_info->dma = 0;
4553 adapter->alloc_rx_buff_failed++;
4554 break;
4555 }
4556 }
4557
4558 rx_desc = E1000_RX_DESC(*rx_ring, i);
4559 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4560
4561 if (unlikely(++i == rx_ring->count))
4562 i = 0;
4563 buffer_info = &rx_ring->buffer_info[i];
4564 }
4565
4566 if (likely(rx_ring->next_to_use != i)) {
4567 rx_ring->next_to_use = i;
4568 if (unlikely(i-- == 0))
4569 i = (rx_ring->count - 1);
4570
4571 /* Force memory writes to complete before letting h/w
4572 * know there are new descriptors to fetch. (Only
4573 * applicable for weak-ordered memory model archs,
4574 * such as IA-64).
4575 */
4576 wmb();
4577 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4578 }
4579}
4580
4581/**
4582 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4583 * @adapter: address of board private structure
4584 **/
4585static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4586 struct e1000_rx_ring *rx_ring,
4587 int cleaned_count)
4588{
4589 struct e1000_hw *hw = &adapter->hw;
4590 struct pci_dev *pdev = adapter->pdev;
4591 struct e1000_rx_desc *rx_desc;
4592 struct e1000_rx_buffer *buffer_info;
4593 unsigned int i;
4594 unsigned int bufsz = adapter->rx_buffer_len;
4595
4596 i = rx_ring->next_to_use;
4597 buffer_info = &rx_ring->buffer_info[i];
4598
4599 while (cleaned_count--) {
4600 void *data;
4601
4602 if (buffer_info->rxbuf.data)
4603 goto skip;
4604
4605 data = e1000_alloc_frag(adapter);
4606 if (!data) {
4607 /* Better luck next round */
4608 adapter->alloc_rx_buff_failed++;
4609 break;
4610 }
4611
4612 /* Fix for errata 23, can't cross 64kB boundary */
4613 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4614 void *olddata = data;
4615 e_err(rx_err, "skb align check failed: %u bytes at "
4616 "%p\n", bufsz, data);
4617 /* Try again, without freeing the previous */
4618 data = e1000_alloc_frag(adapter);
4619 /* Failed allocation, critical failure */
4620 if (!data) {
4621 skb_free_frag(olddata);
4622 adapter->alloc_rx_buff_failed++;
4623 break;
4624 }
4625
4626 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4627 /* give up */
4628 skb_free_frag(data);
4629 skb_free_frag(olddata);
4630 adapter->alloc_rx_buff_failed++;
4631 break;
4632 }
4633
4634 /* Use new allocation */
4635 skb_free_frag(olddata);
4636 }
4637 buffer_info->dma = dma_map_single(&pdev->dev,
4638 data,
4639 adapter->rx_buffer_len,
4640 DMA_FROM_DEVICE);
4641 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4642 skb_free_frag(data);
4643 buffer_info->dma = 0;
4644 adapter->alloc_rx_buff_failed++;
4645 break;
4646 }
4647
4648 /* XXX if it was allocated cleanly it will never map to a
4649 * boundary crossing
4650 */
4651
4652 /* Fix for errata 23, can't cross 64kB boundary */
4653 if (!e1000_check_64k_bound(adapter,
4654 (void *)(unsigned long)buffer_info->dma,
4655 adapter->rx_buffer_len)) {
4656 e_err(rx_err, "dma align check failed: %u bytes at "
4657 "%p\n", adapter->rx_buffer_len,
4658 (void *)(unsigned long)buffer_info->dma);
4659
4660 dma_unmap_single(&pdev->dev, buffer_info->dma,
4661 adapter->rx_buffer_len,
4662 DMA_FROM_DEVICE);
4663
4664 skb_free_frag(data);
4665 buffer_info->rxbuf.data = NULL;
4666 buffer_info->dma = 0;
4667
4668 adapter->alloc_rx_buff_failed++;
4669 break;
4670 }
4671 buffer_info->rxbuf.data = data;
4672 skip:
4673 rx_desc = E1000_RX_DESC(*rx_ring, i);
4674 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4675
4676 if (unlikely(++i == rx_ring->count))
4677 i = 0;
4678 buffer_info = &rx_ring->buffer_info[i];
4679 }
4680
4681 if (likely(rx_ring->next_to_use != i)) {
4682 rx_ring->next_to_use = i;
4683 if (unlikely(i-- == 0))
4684 i = (rx_ring->count - 1);
4685
4686 /* Force memory writes to complete before letting h/w
4687 * know there are new descriptors to fetch. (Only
4688 * applicable for weak-ordered memory model archs,
4689 * such as IA-64).
4690 */
4691 wmb();
4692 writel(i, hw->hw_addr + rx_ring->rdt);
4693 }
4694}
4695
4696/**
4697 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4698 * @adapter:
4699 **/
4700static void e1000_smartspeed(struct e1000_adapter *adapter)
4701{
4702 struct e1000_hw *hw = &adapter->hw;
4703 u16 phy_status;
4704 u16 phy_ctrl;
4705
4706 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4707 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4708 return;
4709
4710 if (adapter->smartspeed == 0) {
4711 /* If Master/Slave config fault is asserted twice,
4712 * we assume back-to-back
4713 */
4714 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4715 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT))
4716 return;
4717 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4718 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT))
4719 return;
4720 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4721 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4722 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4723 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4724 phy_ctrl);
4725 adapter->smartspeed++;
4726 if (!e1000_phy_setup_autoneg(hw) &&
4727 !e1000_read_phy_reg(hw, PHY_CTRL,
4728 &phy_ctrl)) {
4729 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4730 MII_CR_RESTART_AUTO_NEG);
4731 e1000_write_phy_reg(hw, PHY_CTRL,
4732 phy_ctrl);
4733 }
4734 }
4735 return;
4736 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4737 /* If still no link, perhaps using 2/3 pair cable */
4738 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4739 phy_ctrl |= CR_1000T_MS_ENABLE;
4740 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4741 if (!e1000_phy_setup_autoneg(hw) &&
4742 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4743 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4744 MII_CR_RESTART_AUTO_NEG);
4745 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4746 }
4747 }
4748 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4749 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4750 adapter->smartspeed = 0;
4751}
4752
4753/**
4754 * e1000_ioctl -
4755 * @netdev:
4756 * @ifreq:
4757 * @cmd:
4758 **/
4759static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4760{
4761 switch (cmd) {
4762 case SIOCGMIIPHY:
4763 case SIOCGMIIREG:
4764 case SIOCSMIIREG:
4765 return e1000_mii_ioctl(netdev, ifr, cmd);
4766 default:
4767 return -EOPNOTSUPP;
4768 }
4769}
4770
4771/**
4772 * e1000_mii_ioctl -
4773 * @netdev:
4774 * @ifreq:
4775 * @cmd:
4776 **/
4777static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4778 int cmd)
4779{
4780 struct e1000_adapter *adapter = netdev_priv(netdev);
4781 struct e1000_hw *hw = &adapter->hw;
4782 struct mii_ioctl_data *data = if_mii(ifr);
4783 int retval;
4784 u16 mii_reg;
4785 unsigned long flags;
4786
4787 if (hw->media_type != e1000_media_type_copper)
4788 return -EOPNOTSUPP;
4789
4790 switch (cmd) {
4791 case SIOCGMIIPHY:
4792 data->phy_id = hw->phy_addr;
4793 break;
4794 case SIOCGMIIREG:
4795 spin_lock_irqsave(&adapter->stats_lock, flags);
4796 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4797 &data->val_out)) {
4798 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4799 return -EIO;
4800 }
4801 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4802 break;
4803 case SIOCSMIIREG:
4804 if (data->reg_num & ~(0x1F))
4805 return -EFAULT;
4806 mii_reg = data->val_in;
4807 spin_lock_irqsave(&adapter->stats_lock, flags);
4808 if (e1000_write_phy_reg(hw, data->reg_num,
4809 mii_reg)) {
4810 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4811 return -EIO;
4812 }
4813 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4814 if (hw->media_type == e1000_media_type_copper) {
4815 switch (data->reg_num) {
4816 case PHY_CTRL:
4817 if (mii_reg & MII_CR_POWER_DOWN)
4818 break;
4819 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4820 hw->autoneg = 1;
4821 hw->autoneg_advertised = 0x2F;
4822 } else {
4823 u32 speed;
4824 if (mii_reg & 0x40)
4825 speed = SPEED_1000;
4826 else if (mii_reg & 0x2000)
4827 speed = SPEED_100;
4828 else
4829 speed = SPEED_10;
4830 retval = e1000_set_spd_dplx(
4831 adapter, speed,
4832 ((mii_reg & 0x100)
4833 ? DUPLEX_FULL :
4834 DUPLEX_HALF));
4835 if (retval)
4836 return retval;
4837 }
4838 if (netif_running(adapter->netdev))
4839 e1000_reinit_locked(adapter);
4840 else
4841 e1000_reset(adapter);
4842 break;
4843 case M88E1000_PHY_SPEC_CTRL:
4844 case M88E1000_EXT_PHY_SPEC_CTRL:
4845 if (e1000_phy_reset(hw))
4846 return -EIO;
4847 break;
4848 }
4849 } else {
4850 switch (data->reg_num) {
4851 case PHY_CTRL:
4852 if (mii_reg & MII_CR_POWER_DOWN)
4853 break;
4854 if (netif_running(adapter->netdev))
4855 e1000_reinit_locked(adapter);
4856 else
4857 e1000_reset(adapter);
4858 break;
4859 }
4860 }
4861 break;
4862 default:
4863 return -EOPNOTSUPP;
4864 }
4865 return E1000_SUCCESS;
4866}
4867
4868void e1000_pci_set_mwi(struct e1000_hw *hw)
4869{
4870 struct e1000_adapter *adapter = hw->back;
4871 int ret_val = pci_set_mwi(adapter->pdev);
4872
4873 if (ret_val)
4874 e_err(probe, "Error in setting MWI\n");
4875}
4876
4877void e1000_pci_clear_mwi(struct e1000_hw *hw)
4878{
4879 struct e1000_adapter *adapter = hw->back;
4880
4881 pci_clear_mwi(adapter->pdev);
4882}
4883
4884int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4885{
4886 struct e1000_adapter *adapter = hw->back;
4887 return pcix_get_mmrbc(adapter->pdev);
4888}
4889
4890void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4891{
4892 struct e1000_adapter *adapter = hw->back;
4893 pcix_set_mmrbc(adapter->pdev, mmrbc);
4894}
4895
4896void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4897{
4898 outl(value, port);
4899}
4900
4901static bool e1000_vlan_used(struct e1000_adapter *adapter)
4902{
4903 u16 vid;
4904
4905 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4906 return true;
4907 return false;
4908}
4909
4910static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4911 netdev_features_t features)
4912{
4913 struct e1000_hw *hw = &adapter->hw;
4914 u32 ctrl;
4915
4916 ctrl = er32(CTRL);
4917 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
4918 /* enable VLAN tag insert/strip */
4919 ctrl |= E1000_CTRL_VME;
4920 } else {
4921 /* disable VLAN tag insert/strip */
4922 ctrl &= ~E1000_CTRL_VME;
4923 }
4924 ew32(CTRL, ctrl);
4925}
4926static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4927 bool filter_on)
4928{
4929 struct e1000_hw *hw = &adapter->hw;
4930 u32 rctl;
4931
4932 if (!test_bit(__E1000_DOWN, &adapter->flags))
4933 e1000_irq_disable(adapter);
4934
4935 __e1000_vlan_mode(adapter, adapter->netdev->features);
4936 if (filter_on) {
4937 /* enable VLAN receive filtering */
4938 rctl = er32(RCTL);
4939 rctl &= ~E1000_RCTL_CFIEN;
4940 if (!(adapter->netdev->flags & IFF_PROMISC))
4941 rctl |= E1000_RCTL_VFE;
4942 ew32(RCTL, rctl);
4943 e1000_update_mng_vlan(adapter);
4944 } else {
4945 /* disable VLAN receive filtering */
4946 rctl = er32(RCTL);
4947 rctl &= ~E1000_RCTL_VFE;
4948 ew32(RCTL, rctl);
4949 }
4950
4951 if (!test_bit(__E1000_DOWN, &adapter->flags))
4952 e1000_irq_enable(adapter);
4953}
4954
4955static void e1000_vlan_mode(struct net_device *netdev,
4956 netdev_features_t features)
4957{
4958 struct e1000_adapter *adapter = netdev_priv(netdev);
4959
4960 if (!test_bit(__E1000_DOWN, &adapter->flags))
4961 e1000_irq_disable(adapter);
4962
4963 __e1000_vlan_mode(adapter, features);
4964
4965 if (!test_bit(__E1000_DOWN, &adapter->flags))
4966 e1000_irq_enable(adapter);
4967}
4968
4969static int e1000_vlan_rx_add_vid(struct net_device *netdev,
4970 __be16 proto, u16 vid)
4971{
4972 struct e1000_adapter *adapter = netdev_priv(netdev);
4973 struct e1000_hw *hw = &adapter->hw;
4974 u32 vfta, index;
4975
4976 if ((hw->mng_cookie.status &
4977 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4978 (vid == adapter->mng_vlan_id))
4979 return 0;
4980
4981 if (!e1000_vlan_used(adapter))
4982 e1000_vlan_filter_on_off(adapter, true);
4983
4984 /* add VID to filter table */
4985 index = (vid >> 5) & 0x7F;
4986 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4987 vfta |= (1 << (vid & 0x1F));
4988 e1000_write_vfta(hw, index, vfta);
4989
4990 set_bit(vid, adapter->active_vlans);
4991
4992 return 0;
4993}
4994
4995static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
4996 __be16 proto, u16 vid)
4997{
4998 struct e1000_adapter *adapter = netdev_priv(netdev);
4999 struct e1000_hw *hw = &adapter->hw;
5000 u32 vfta, index;
5001
5002 if (!test_bit(__E1000_DOWN, &adapter->flags))
5003 e1000_irq_disable(adapter);
5004 if (!test_bit(__E1000_DOWN, &adapter->flags))
5005 e1000_irq_enable(adapter);
5006
5007 /* remove VID from filter table */
5008 index = (vid >> 5) & 0x7F;
5009 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
5010 vfta &= ~(1 << (vid & 0x1F));
5011 e1000_write_vfta(hw, index, vfta);
5012
5013 clear_bit(vid, adapter->active_vlans);
5014
5015 if (!e1000_vlan_used(adapter))
5016 e1000_vlan_filter_on_off(adapter, false);
5017
5018 return 0;
5019}
5020
5021static void e1000_restore_vlan(struct e1000_adapter *adapter)
5022{
5023 u16 vid;
5024
5025 if (!e1000_vlan_used(adapter))
5026 return;
5027
5028 e1000_vlan_filter_on_off(adapter, true);
5029 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
5030 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
5031}
5032
5033int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
5034{
5035 struct e1000_hw *hw = &adapter->hw;
5036
5037 hw->autoneg = 0;
5038
5039 /* Make sure dplx is at most 1 bit and lsb of speed is not set
5040 * for the switch() below to work
5041 */
5042 if ((spd & 1) || (dplx & ~1))
5043 goto err_inval;
5044
5045 /* Fiber NICs only allow 1000 gbps Full duplex */
5046 if ((hw->media_type == e1000_media_type_fiber) &&
5047 spd != SPEED_1000 &&
5048 dplx != DUPLEX_FULL)
5049 goto err_inval;
5050
5051 switch (spd + dplx) {
5052 case SPEED_10 + DUPLEX_HALF:
5053 hw->forced_speed_duplex = e1000_10_half;
5054 break;
5055 case SPEED_10 + DUPLEX_FULL:
5056 hw->forced_speed_duplex = e1000_10_full;
5057 break;
5058 case SPEED_100 + DUPLEX_HALF:
5059 hw->forced_speed_duplex = e1000_100_half;
5060 break;
5061 case SPEED_100 + DUPLEX_FULL:
5062 hw->forced_speed_duplex = e1000_100_full;
5063 break;
5064 case SPEED_1000 + DUPLEX_FULL:
5065 hw->autoneg = 1;
5066 hw->autoneg_advertised = ADVERTISE_1000_FULL;
5067 break;
5068 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5069 default:
5070 goto err_inval;
5071 }
5072
5073 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
5074 hw->mdix = AUTO_ALL_MODES;
5075
5076 return 0;
5077
5078err_inval:
5079 e_err(probe, "Unsupported Speed/Duplex configuration\n");
5080 return -EINVAL;
5081}
5082
5083static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
5084{
5085 struct net_device *netdev = pci_get_drvdata(pdev);
5086 struct e1000_adapter *adapter = netdev_priv(netdev);
5087 struct e1000_hw *hw = &adapter->hw;
5088 u32 ctrl, ctrl_ext, rctl, status;
5089 u32 wufc = adapter->wol;
5090#ifdef CONFIG_PM
5091 int retval = 0;
5092#endif
5093
5094 netif_device_detach(netdev);
5095
5096 if (netif_running(netdev)) {
5097 int count = E1000_CHECK_RESET_COUNT;
5098
5099 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
5100 usleep_range(10000, 20000);
5101
5102 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5103 e1000_down(adapter);
5104 }
5105
5106#ifdef CONFIG_PM
5107 retval = pci_save_state(pdev);
5108 if (retval)
5109 return retval;
5110#endif
5111
5112 status = er32(STATUS);
5113 if (status & E1000_STATUS_LU)
5114 wufc &= ~E1000_WUFC_LNKC;
5115
5116 if (wufc) {
5117 e1000_setup_rctl(adapter);
5118 e1000_set_rx_mode(netdev);
5119
5120 rctl = er32(RCTL);
5121
5122 /* turn on all-multi mode if wake on multicast is enabled */
5123 if (wufc & E1000_WUFC_MC)
5124 rctl |= E1000_RCTL_MPE;
5125
5126 /* enable receives in the hardware */
5127 ew32(RCTL, rctl | E1000_RCTL_EN);
5128
5129 if (hw->mac_type >= e1000_82540) {
5130 ctrl = er32(CTRL);
5131 /* advertise wake from D3Cold */
5132 #define E1000_CTRL_ADVD3WUC 0x00100000
5133 /* phy power management enable */
5134 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5135 ctrl |= E1000_CTRL_ADVD3WUC |
5136 E1000_CTRL_EN_PHY_PWR_MGMT;
5137 ew32(CTRL, ctrl);
5138 }
5139
5140 if (hw->media_type == e1000_media_type_fiber ||
5141 hw->media_type == e1000_media_type_internal_serdes) {
5142 /* keep the laser running in D3 */
5143 ctrl_ext = er32(CTRL_EXT);
5144 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5145 ew32(CTRL_EXT, ctrl_ext);
5146 }
5147
5148 ew32(WUC, E1000_WUC_PME_EN);
5149 ew32(WUFC, wufc);
5150 } else {
5151 ew32(WUC, 0);
5152 ew32(WUFC, 0);
5153 }
5154
5155 e1000_release_manageability(adapter);
5156
5157 *enable_wake = !!wufc;
5158
5159 /* make sure adapter isn't asleep if manageability is enabled */
5160 if (adapter->en_mng_pt)
5161 *enable_wake = true;
5162
5163 if (netif_running(netdev))
5164 e1000_free_irq(adapter);
5165
5166 if (!test_and_set_bit(__E1000_DISABLED, &adapter->flags))
5167 pci_disable_device(pdev);
5168
5169 return 0;
5170}
5171
5172#ifdef CONFIG_PM
5173static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5174{
5175 int retval;
5176 bool wake;
5177
5178 retval = __e1000_shutdown(pdev, &wake);
5179 if (retval)
5180 return retval;
5181
5182 if (wake) {
5183 pci_prepare_to_sleep(pdev);
5184 } else {
5185 pci_wake_from_d3(pdev, false);
5186 pci_set_power_state(pdev, PCI_D3hot);
5187 }
5188
5189 return 0;
5190}
5191
5192static int e1000_resume(struct pci_dev *pdev)
5193{
5194 struct net_device *netdev = pci_get_drvdata(pdev);
5195 struct e1000_adapter *adapter = netdev_priv(netdev);
5196 struct e1000_hw *hw = &adapter->hw;
5197 u32 err;
5198
5199 pci_set_power_state(pdev, PCI_D0);
5200 pci_restore_state(pdev);
5201 pci_save_state(pdev);
5202
5203 if (adapter->need_ioport)
5204 err = pci_enable_device(pdev);
5205 else
5206 err = pci_enable_device_mem(pdev);
5207 if (err) {
5208 pr_err("Cannot enable PCI device from suspend\n");
5209 return err;
5210 }
5211
5212 /* flush memory to make sure state is correct */
5213 smp_mb__before_atomic();
5214 clear_bit(__E1000_DISABLED, &adapter->flags);
5215 pci_set_master(pdev);
5216
5217 pci_enable_wake(pdev, PCI_D3hot, 0);
5218 pci_enable_wake(pdev, PCI_D3cold, 0);
5219
5220 if (netif_running(netdev)) {
5221 err = e1000_request_irq(adapter);
5222 if (err)
5223 return err;
5224 }
5225
5226 e1000_power_up_phy(adapter);
5227 e1000_reset(adapter);
5228 ew32(WUS, ~0);
5229
5230 e1000_init_manageability(adapter);
5231
5232 if (netif_running(netdev))
5233 e1000_up(adapter);
5234
5235 netif_device_attach(netdev);
5236
5237 return 0;
5238}
5239#endif
5240
5241static void e1000_shutdown(struct pci_dev *pdev)
5242{
5243 bool wake;
5244
5245 __e1000_shutdown(pdev, &wake);
5246
5247 if (system_state == SYSTEM_POWER_OFF) {
5248 pci_wake_from_d3(pdev, wake);
5249 pci_set_power_state(pdev, PCI_D3hot);
5250 }
5251}
5252
5253#ifdef CONFIG_NET_POLL_CONTROLLER
5254/* Polling 'interrupt' - used by things like netconsole to send skbs
5255 * without having to re-enable interrupts. It's not called while
5256 * the interrupt routine is executing.
5257 */
5258static void e1000_netpoll(struct net_device *netdev)
5259{
5260 struct e1000_adapter *adapter = netdev_priv(netdev);
5261
5262 if (disable_hardirq(adapter->pdev->irq))
5263 e1000_intr(adapter->pdev->irq, netdev);
5264 enable_irq(adapter->pdev->irq);
5265}
5266#endif
5267
5268/**
5269 * e1000_io_error_detected - called when PCI error is detected
5270 * @pdev: Pointer to PCI device
5271 * @state: The current pci connection state
5272 *
5273 * This function is called after a PCI bus error affecting
5274 * this device has been detected.
5275 */
5276static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5277 pci_channel_state_t state)
5278{
5279 struct net_device *netdev = pci_get_drvdata(pdev);
5280 struct e1000_adapter *adapter = netdev_priv(netdev);
5281
5282 netif_device_detach(netdev);
5283
5284 if (state == pci_channel_io_perm_failure)
5285 return PCI_ERS_RESULT_DISCONNECT;
5286
5287 if (netif_running(netdev))
5288 e1000_down(adapter);
5289
5290 if (!test_and_set_bit(__E1000_DISABLED, &adapter->flags))
5291 pci_disable_device(pdev);
5292
5293 /* Request a slot slot reset. */
5294 return PCI_ERS_RESULT_NEED_RESET;
5295}
5296
5297/**
5298 * e1000_io_slot_reset - called after the pci bus has been reset.
5299 * @pdev: Pointer to PCI device
5300 *
5301 * Restart the card from scratch, as if from a cold-boot. Implementation
5302 * resembles the first-half of the e1000_resume routine.
5303 */
5304static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5305{
5306 struct net_device *netdev = pci_get_drvdata(pdev);
5307 struct e1000_adapter *adapter = netdev_priv(netdev);
5308 struct e1000_hw *hw = &adapter->hw;
5309 int err;
5310
5311 if (adapter->need_ioport)
5312 err = pci_enable_device(pdev);
5313 else
5314 err = pci_enable_device_mem(pdev);
5315 if (err) {
5316 pr_err("Cannot re-enable PCI device after reset.\n");
5317 return PCI_ERS_RESULT_DISCONNECT;
5318 }
5319
5320 /* flush memory to make sure state is correct */
5321 smp_mb__before_atomic();
5322 clear_bit(__E1000_DISABLED, &adapter->flags);
5323 pci_set_master(pdev);
5324
5325 pci_enable_wake(pdev, PCI_D3hot, 0);
5326 pci_enable_wake(pdev, PCI_D3cold, 0);
5327
5328 e1000_reset(adapter);
5329 ew32(WUS, ~0);
5330
5331 return PCI_ERS_RESULT_RECOVERED;
5332}
5333
5334/**
5335 * e1000_io_resume - called when traffic can start flowing again.
5336 * @pdev: Pointer to PCI device
5337 *
5338 * This callback is called when the error recovery driver tells us that
5339 * its OK to resume normal operation. Implementation resembles the
5340 * second-half of the e1000_resume routine.
5341 */
5342static void e1000_io_resume(struct pci_dev *pdev)
5343{
5344 struct net_device *netdev = pci_get_drvdata(pdev);
5345 struct e1000_adapter *adapter = netdev_priv(netdev);
5346
5347 e1000_init_manageability(adapter);
5348
5349 if (netif_running(netdev)) {
5350 if (e1000_up(adapter)) {
5351 pr_info("can't bring device back up after reset\n");
5352 return;
5353 }
5354 }
5355
5356 netif_device_attach(netdev);
5357}
5358
5359/* e1000_main.c */