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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/*******************************************************************************
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 DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
50 INTEL_E1000_ETHERNET_DEVICE(0x1000),
51 INTEL_E1000_ETHERNET_DEVICE(0x1001),
52 INTEL_E1000_ETHERNET_DEVICE(0x1004),
53 INTEL_E1000_ETHERNET_DEVICE(0x1008),
54 INTEL_E1000_ETHERNET_DEVICE(0x1009),
55 INTEL_E1000_ETHERNET_DEVICE(0x100C),
56 INTEL_E1000_ETHERNET_DEVICE(0x100D),
57 INTEL_E1000_ETHERNET_DEVICE(0x100E),
58 INTEL_E1000_ETHERNET_DEVICE(0x100F),
59 INTEL_E1000_ETHERNET_DEVICE(0x1010),
60 INTEL_E1000_ETHERNET_DEVICE(0x1011),
61 INTEL_E1000_ETHERNET_DEVICE(0x1012),
62 INTEL_E1000_ETHERNET_DEVICE(0x1013),
63 INTEL_E1000_ETHERNET_DEVICE(0x1014),
64 INTEL_E1000_ETHERNET_DEVICE(0x1015),
65 INTEL_E1000_ETHERNET_DEVICE(0x1016),
66 INTEL_E1000_ETHERNET_DEVICE(0x1017),
67 INTEL_E1000_ETHERNET_DEVICE(0x1018),
68 INTEL_E1000_ETHERNET_DEVICE(0x1019),
69 INTEL_E1000_ETHERNET_DEVICE(0x101A),
70 INTEL_E1000_ETHERNET_DEVICE(0x101D),
71 INTEL_E1000_ETHERNET_DEVICE(0x101E),
72 INTEL_E1000_ETHERNET_DEVICE(0x1026),
73 INTEL_E1000_ETHERNET_DEVICE(0x1027),
74 INTEL_E1000_ETHERNET_DEVICE(0x1028),
75 INTEL_E1000_ETHERNET_DEVICE(0x1075),
76 INTEL_E1000_ETHERNET_DEVICE(0x1076),
77 INTEL_E1000_ETHERNET_DEVICE(0x1077),
78 INTEL_E1000_ETHERNET_DEVICE(0x1078),
79 INTEL_E1000_ETHERNET_DEVICE(0x1079),
80 INTEL_E1000_ETHERNET_DEVICE(0x107A),
81 INTEL_E1000_ETHERNET_DEVICE(0x107B),
82 INTEL_E1000_ETHERNET_DEVICE(0x107C),
83 INTEL_E1000_ETHERNET_DEVICE(0x108A),
84 INTEL_E1000_ETHERNET_DEVICE(0x1099),
85 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
86 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
87 /* required last entry */
88 {0,}
89};
90
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_rx_buffers(struct e1000_adapter *adapter,
148 struct e1000_rx_ring *rx_ring,
149 int cleaned_count);
150static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
151 struct e1000_rx_ring *rx_ring,
152 int cleaned_count);
153static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
154static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
155 int cmd);
156static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
157static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
158static void e1000_tx_timeout(struct net_device *dev);
159static void e1000_reset_task(struct work_struct *work);
160static void e1000_smartspeed(struct e1000_adapter *adapter);
161static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
162 struct sk_buff *skb);
163
164static bool e1000_vlan_used(struct e1000_adapter *adapter);
165static void e1000_vlan_mode(struct net_device *netdev,
166 netdev_features_t features);
167static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
168 bool filter_on);
169static int e1000_vlan_rx_add_vid(struct net_device *netdev,
170 __be16 proto, u16 vid);
171static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
172 __be16 proto, u16 vid);
173static void e1000_restore_vlan(struct e1000_adapter *adapter);
174
175#ifdef CONFIG_PM
176static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
177static int e1000_resume(struct pci_dev *pdev);
178#endif
179static void e1000_shutdown(struct pci_dev *pdev);
180
181#ifdef CONFIG_NET_POLL_CONTROLLER
182/* for netdump / net console */
183static void e1000_netpoll (struct net_device *netdev);
184#endif
185
186#define COPYBREAK_DEFAULT 256
187static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
188module_param(copybreak, uint, 0644);
189MODULE_PARM_DESC(copybreak,
190 "Maximum size of packet that is copied to a new buffer on receive");
191
192static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
193 pci_channel_state_t state);
194static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
195static void e1000_io_resume(struct pci_dev *pdev);
196
197static const struct pci_error_handlers e1000_err_handler = {
198 .error_detected = e1000_io_error_detected,
199 .slot_reset = e1000_io_slot_reset,
200 .resume = e1000_io_resume,
201};
202
203static struct pci_driver e1000_driver = {
204 .name = e1000_driver_name,
205 .id_table = e1000_pci_tbl,
206 .probe = e1000_probe,
207 .remove = e1000_remove,
208#ifdef CONFIG_PM
209 /* Power Management Hooks */
210 .suspend = e1000_suspend,
211 .resume = e1000_resume,
212#endif
213 .shutdown = e1000_shutdown,
214 .err_handler = &e1000_err_handler
215};
216
217MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
218MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
219MODULE_LICENSE("GPL");
220MODULE_VERSION(DRV_VERSION);
221
222#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
223static int debug = -1;
224module_param(debug, int, 0);
225MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
226
227/**
228 * e1000_get_hw_dev - return device
229 * used by hardware layer to print debugging information
230 *
231 **/
232struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
233{
234 struct e1000_adapter *adapter = hw->back;
235 return adapter->netdev;
236}
237
238/**
239 * e1000_init_module - Driver Registration Routine
240 *
241 * e1000_init_module is the first routine called when the driver is
242 * loaded. All it does is register with the PCI subsystem.
243 **/
244static int __init e1000_init_module(void)
245{
246 int ret;
247 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
248
249 pr_info("%s\n", e1000_copyright);
250
251 ret = pci_register_driver(&e1000_driver);
252 if (copybreak != COPYBREAK_DEFAULT) {
253 if (copybreak == 0)
254 pr_info("copybreak disabled\n");
255 else
256 pr_info("copybreak enabled for "
257 "packets <= %u bytes\n", copybreak);
258 }
259 return ret;
260}
261
262module_init(e1000_init_module);
263
264/**
265 * e1000_exit_module - Driver Exit Cleanup Routine
266 *
267 * e1000_exit_module is called just before the driver is removed
268 * from memory.
269 **/
270static void __exit e1000_exit_module(void)
271{
272 pci_unregister_driver(&e1000_driver);
273}
274
275module_exit(e1000_exit_module);
276
277static int e1000_request_irq(struct e1000_adapter *adapter)
278{
279 struct net_device *netdev = adapter->netdev;
280 irq_handler_t handler = e1000_intr;
281 int irq_flags = IRQF_SHARED;
282 int err;
283
284 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
285 netdev);
286 if (err) {
287 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
288 }
289
290 return err;
291}
292
293static void e1000_free_irq(struct e1000_adapter *adapter)
294{
295 struct net_device *netdev = adapter->netdev;
296
297 free_irq(adapter->pdev->irq, netdev);
298}
299
300/**
301 * e1000_irq_disable - Mask off interrupt generation on the NIC
302 * @adapter: board private structure
303 **/
304static void e1000_irq_disable(struct e1000_adapter *adapter)
305{
306 struct e1000_hw *hw = &adapter->hw;
307
308 ew32(IMC, ~0);
309 E1000_WRITE_FLUSH();
310 synchronize_irq(adapter->pdev->irq);
311}
312
313/**
314 * e1000_irq_enable - Enable default interrupt generation settings
315 * @adapter: board private structure
316 **/
317static void e1000_irq_enable(struct e1000_adapter *adapter)
318{
319 struct e1000_hw *hw = &adapter->hw;
320
321 ew32(IMS, IMS_ENABLE_MASK);
322 E1000_WRITE_FLUSH();
323}
324
325static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
326{
327 struct e1000_hw *hw = &adapter->hw;
328 struct net_device *netdev = adapter->netdev;
329 u16 vid = hw->mng_cookie.vlan_id;
330 u16 old_vid = adapter->mng_vlan_id;
331
332 if (!e1000_vlan_used(adapter))
333 return;
334
335 if (!test_bit(vid, adapter->active_vlans)) {
336 if (hw->mng_cookie.status &
337 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
338 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
339 adapter->mng_vlan_id = vid;
340 } else {
341 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
342 }
343 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
344 (vid != old_vid) &&
345 !test_bit(old_vid, adapter->active_vlans))
346 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
347 old_vid);
348 } else {
349 adapter->mng_vlan_id = vid;
350 }
351}
352
353static void e1000_init_manageability(struct e1000_adapter *adapter)
354{
355 struct e1000_hw *hw = &adapter->hw;
356
357 if (adapter->en_mng_pt) {
358 u32 manc = er32(MANC);
359
360 /* disable hardware interception of ARP */
361 manc &= ~(E1000_MANC_ARP_EN);
362
363 ew32(MANC, manc);
364 }
365}
366
367static void e1000_release_manageability(struct e1000_adapter *adapter)
368{
369 struct e1000_hw *hw = &adapter->hw;
370
371 if (adapter->en_mng_pt) {
372 u32 manc = er32(MANC);
373
374 /* re-enable hardware interception of ARP */
375 manc |= E1000_MANC_ARP_EN;
376
377 ew32(MANC, manc);
378 }
379}
380
381/**
382 * e1000_configure - configure the hardware for RX and TX
383 * @adapter = private board structure
384 **/
385static void e1000_configure(struct e1000_adapter *adapter)
386{
387 struct net_device *netdev = adapter->netdev;
388 int i;
389
390 e1000_set_rx_mode(netdev);
391
392 e1000_restore_vlan(adapter);
393 e1000_init_manageability(adapter);
394
395 e1000_configure_tx(adapter);
396 e1000_setup_rctl(adapter);
397 e1000_configure_rx(adapter);
398 /* call E1000_DESC_UNUSED which always leaves
399 * at least 1 descriptor unused to make sure
400 * next_to_use != next_to_clean
401 */
402 for (i = 0; i < adapter->num_rx_queues; i++) {
403 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
404 adapter->alloc_rx_buf(adapter, ring,
405 E1000_DESC_UNUSED(ring));
406 }
407}
408
409int e1000_up(struct e1000_adapter *adapter)
410{
411 struct e1000_hw *hw = &adapter->hw;
412
413 /* hardware has been reset, we need to reload some things */
414 e1000_configure(adapter);
415
416 clear_bit(__E1000_DOWN, &adapter->flags);
417
418 napi_enable(&adapter->napi);
419
420 e1000_irq_enable(adapter);
421
422 netif_wake_queue(adapter->netdev);
423
424 /* fire a link change interrupt to start the watchdog */
425 ew32(ICS, E1000_ICS_LSC);
426 return 0;
427}
428
429/**
430 * e1000_power_up_phy - restore link in case the phy was powered down
431 * @adapter: address of board private structure
432 *
433 * The phy may be powered down to save power and turn off link when the
434 * driver is unloaded and wake on lan is not enabled (among others)
435 * *** this routine MUST be followed by a call to e1000_reset ***
436 **/
437void e1000_power_up_phy(struct e1000_adapter *adapter)
438{
439 struct e1000_hw *hw = &adapter->hw;
440 u16 mii_reg = 0;
441
442 /* Just clear the power down bit to wake the phy back up */
443 if (hw->media_type == e1000_media_type_copper) {
444 /* according to the manual, the phy will retain its
445 * settings across a power-down/up cycle
446 */
447 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
448 mii_reg &= ~MII_CR_POWER_DOWN;
449 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
450 }
451}
452
453static void e1000_power_down_phy(struct e1000_adapter *adapter)
454{
455 struct e1000_hw *hw = &adapter->hw;
456
457 /* Power down the PHY so no link is implied when interface is down *
458 * The PHY cannot be powered down if any of the following is true *
459 * (a) WoL is enabled
460 * (b) AMT is active
461 * (c) SoL/IDER session is active
462 */
463 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
464 hw->media_type == e1000_media_type_copper) {
465 u16 mii_reg = 0;
466
467 switch (hw->mac_type) {
468 case e1000_82540:
469 case e1000_82545:
470 case e1000_82545_rev_3:
471 case e1000_82546:
472 case e1000_ce4100:
473 case e1000_82546_rev_3:
474 case e1000_82541:
475 case e1000_82541_rev_2:
476 case e1000_82547:
477 case e1000_82547_rev_2:
478 if (er32(MANC) & E1000_MANC_SMBUS_EN)
479 goto out;
480 break;
481 default:
482 goto out;
483 }
484 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
485 mii_reg |= MII_CR_POWER_DOWN;
486 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
487 msleep(1);
488 }
489out:
490 return;
491}
492
493static void e1000_down_and_stop(struct e1000_adapter *adapter)
494{
495 set_bit(__E1000_DOWN, &adapter->flags);
496
497 cancel_delayed_work_sync(&adapter->watchdog_task);
498
499 /*
500 * Since the watchdog task can reschedule other tasks, we should cancel
501 * it first, otherwise we can run into the situation when a work is
502 * still running after the adapter has been turned down.
503 */
504
505 cancel_delayed_work_sync(&adapter->phy_info_task);
506 cancel_delayed_work_sync(&adapter->fifo_stall_task);
507
508 /* Only kill reset task if adapter is not resetting */
509 if (!test_bit(__E1000_RESETTING, &adapter->flags))
510 cancel_work_sync(&adapter->reset_task);
511}
512
513void e1000_down(struct e1000_adapter *adapter)
514{
515 struct e1000_hw *hw = &adapter->hw;
516 struct net_device *netdev = adapter->netdev;
517 u32 rctl, tctl;
518
519
520 /* disable receives in the hardware */
521 rctl = er32(RCTL);
522 ew32(RCTL, rctl & ~E1000_RCTL_EN);
523 /* flush and sleep below */
524
525 netif_tx_disable(netdev);
526
527 /* disable transmits in the hardware */
528 tctl = er32(TCTL);
529 tctl &= ~E1000_TCTL_EN;
530 ew32(TCTL, tctl);
531 /* flush both disables and wait for them to finish */
532 E1000_WRITE_FLUSH();
533 msleep(10);
534
535 napi_disable(&adapter->napi);
536
537 e1000_irq_disable(adapter);
538
539 /* Setting DOWN must be after irq_disable to prevent
540 * a screaming interrupt. Setting DOWN also prevents
541 * tasks from rescheduling.
542 */
543 e1000_down_and_stop(adapter);
544
545 adapter->link_speed = 0;
546 adapter->link_duplex = 0;
547 netif_carrier_off(netdev);
548
549 e1000_reset(adapter);
550 e1000_clean_all_tx_rings(adapter);
551 e1000_clean_all_rx_rings(adapter);
552}
553
554void e1000_reinit_locked(struct e1000_adapter *adapter)
555{
556 WARN_ON(in_interrupt());
557 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
558 msleep(1);
559 e1000_down(adapter);
560 e1000_up(adapter);
561 clear_bit(__E1000_RESETTING, &adapter->flags);
562}
563
564void e1000_reset(struct e1000_adapter *adapter)
565{
566 struct e1000_hw *hw = &adapter->hw;
567 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
568 bool legacy_pba_adjust = false;
569 u16 hwm;
570
571 /* Repartition Pba for greater than 9k mtu
572 * To take effect CTRL.RST is required.
573 */
574
575 switch (hw->mac_type) {
576 case e1000_82542_rev2_0:
577 case e1000_82542_rev2_1:
578 case e1000_82543:
579 case e1000_82544:
580 case e1000_82540:
581 case e1000_82541:
582 case e1000_82541_rev_2:
583 legacy_pba_adjust = true;
584 pba = E1000_PBA_48K;
585 break;
586 case e1000_82545:
587 case e1000_82545_rev_3:
588 case e1000_82546:
589 case e1000_ce4100:
590 case e1000_82546_rev_3:
591 pba = E1000_PBA_48K;
592 break;
593 case e1000_82547:
594 case e1000_82547_rev_2:
595 legacy_pba_adjust = true;
596 pba = E1000_PBA_30K;
597 break;
598 case e1000_undefined:
599 case e1000_num_macs:
600 break;
601 }
602
603 if (legacy_pba_adjust) {
604 if (hw->max_frame_size > E1000_RXBUFFER_8192)
605 pba -= 8; /* allocate more FIFO for Tx */
606
607 if (hw->mac_type == e1000_82547) {
608 adapter->tx_fifo_head = 0;
609 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
610 adapter->tx_fifo_size =
611 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
612 atomic_set(&adapter->tx_fifo_stall, 0);
613 }
614 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
615 /* adjust PBA for jumbo frames */
616 ew32(PBA, pba);
617
618 /* To maintain wire speed transmits, the Tx FIFO should be
619 * large enough to accommodate two full transmit packets,
620 * rounded up to the next 1KB and expressed in KB. Likewise,
621 * the Rx FIFO should be large enough to accommodate at least
622 * one full receive packet and is similarly rounded up and
623 * expressed in KB.
624 */
625 pba = er32(PBA);
626 /* upper 16 bits has Tx packet buffer allocation size in KB */
627 tx_space = pba >> 16;
628 /* lower 16 bits has Rx packet buffer allocation size in KB */
629 pba &= 0xffff;
630 /* the Tx fifo also stores 16 bytes of information about the Tx
631 * but don't include ethernet FCS because hardware appends it
632 */
633 min_tx_space = (hw->max_frame_size +
634 sizeof(struct e1000_tx_desc) -
635 ETH_FCS_LEN) * 2;
636 min_tx_space = ALIGN(min_tx_space, 1024);
637 min_tx_space >>= 10;
638 /* software strips receive CRC, so leave room for it */
639 min_rx_space = hw->max_frame_size;
640 min_rx_space = ALIGN(min_rx_space, 1024);
641 min_rx_space >>= 10;
642
643 /* If current Tx allocation is less than the min Tx FIFO size,
644 * and the min Tx FIFO size is less than the current Rx FIFO
645 * allocation, take space away from current Rx allocation
646 */
647 if (tx_space < min_tx_space &&
648 ((min_tx_space - tx_space) < pba)) {
649 pba = pba - (min_tx_space - tx_space);
650
651 /* PCI/PCIx hardware has PBA alignment constraints */
652 switch (hw->mac_type) {
653 case e1000_82545 ... e1000_82546_rev_3:
654 pba &= ~(E1000_PBA_8K - 1);
655 break;
656 default:
657 break;
658 }
659
660 /* if short on Rx space, Rx wins and must trump Tx
661 * adjustment or use Early Receive if available
662 */
663 if (pba < min_rx_space)
664 pba = min_rx_space;
665 }
666 }
667
668 ew32(PBA, pba);
669
670 /* flow control settings:
671 * The high water mark must be low enough to fit one full frame
672 * (or the size used for early receive) above it in the Rx FIFO.
673 * Set it to the lower of:
674 * - 90% of the Rx FIFO size, and
675 * - the full Rx FIFO size minus the early receive size (for parts
676 * with ERT support assuming ERT set to E1000_ERT_2048), or
677 * - the full Rx FIFO size minus one full frame
678 */
679 hwm = min(((pba << 10) * 9 / 10),
680 ((pba << 10) - hw->max_frame_size));
681
682 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
683 hw->fc_low_water = hw->fc_high_water - 8;
684 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
685 hw->fc_send_xon = 1;
686 hw->fc = hw->original_fc;
687
688 /* Allow time for pending master requests to run */
689 e1000_reset_hw(hw);
690 if (hw->mac_type >= e1000_82544)
691 ew32(WUC, 0);
692
693 if (e1000_init_hw(hw))
694 e_dev_err("Hardware Error\n");
695 e1000_update_mng_vlan(adapter);
696
697 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
698 if (hw->mac_type >= e1000_82544 &&
699 hw->autoneg == 1 &&
700 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
701 u32 ctrl = er32(CTRL);
702 /* clear phy power management bit if we are in gig only mode,
703 * which if enabled will attempt negotiation to 100Mb, which
704 * can cause a loss of link at power off or driver unload
705 */
706 ctrl &= ~E1000_CTRL_SWDPIN3;
707 ew32(CTRL, ctrl);
708 }
709
710 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
711 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
712
713 e1000_reset_adaptive(hw);
714 e1000_phy_get_info(hw, &adapter->phy_info);
715
716 e1000_release_manageability(adapter);
717}
718
719/* Dump the eeprom for users having checksum issues */
720static void e1000_dump_eeprom(struct e1000_adapter *adapter)
721{
722 struct net_device *netdev = adapter->netdev;
723 struct ethtool_eeprom eeprom;
724 const struct ethtool_ops *ops = netdev->ethtool_ops;
725 u8 *data;
726 int i;
727 u16 csum_old, csum_new = 0;
728
729 eeprom.len = ops->get_eeprom_len(netdev);
730 eeprom.offset = 0;
731
732 data = kmalloc(eeprom.len, GFP_KERNEL);
733 if (!data)
734 return;
735
736 ops->get_eeprom(netdev, &eeprom, data);
737
738 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
739 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
740 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
741 csum_new += data[i] + (data[i + 1] << 8);
742 csum_new = EEPROM_SUM - csum_new;
743
744 pr_err("/*********************/\n");
745 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
746 pr_err("Calculated : 0x%04x\n", csum_new);
747
748 pr_err("Offset Values\n");
749 pr_err("======== ======\n");
750 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
751
752 pr_err("Include this output when contacting your support provider.\n");
753 pr_err("This is not a software error! Something bad happened to\n");
754 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
755 pr_err("result in further problems, possibly loss of data,\n");
756 pr_err("corruption or system hangs!\n");
757 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
758 pr_err("which is invalid and requires you to set the proper MAC\n");
759 pr_err("address manually before continuing to enable this network\n");
760 pr_err("device. Please inspect the EEPROM dump and report the\n");
761 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
762 pr_err("/*********************/\n");
763
764 kfree(data);
765}
766
767/**
768 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
769 * @pdev: PCI device information struct
770 *
771 * Return true if an adapter needs ioport resources
772 **/
773static int e1000_is_need_ioport(struct pci_dev *pdev)
774{
775 switch (pdev->device) {
776 case E1000_DEV_ID_82540EM:
777 case E1000_DEV_ID_82540EM_LOM:
778 case E1000_DEV_ID_82540EP:
779 case E1000_DEV_ID_82540EP_LOM:
780 case E1000_DEV_ID_82540EP_LP:
781 case E1000_DEV_ID_82541EI:
782 case E1000_DEV_ID_82541EI_MOBILE:
783 case E1000_DEV_ID_82541ER:
784 case E1000_DEV_ID_82541ER_LOM:
785 case E1000_DEV_ID_82541GI:
786 case E1000_DEV_ID_82541GI_LF:
787 case E1000_DEV_ID_82541GI_MOBILE:
788 case E1000_DEV_ID_82544EI_COPPER:
789 case E1000_DEV_ID_82544EI_FIBER:
790 case E1000_DEV_ID_82544GC_COPPER:
791 case E1000_DEV_ID_82544GC_LOM:
792 case E1000_DEV_ID_82545EM_COPPER:
793 case E1000_DEV_ID_82545EM_FIBER:
794 case E1000_DEV_ID_82546EB_COPPER:
795 case E1000_DEV_ID_82546EB_FIBER:
796 case E1000_DEV_ID_82546EB_QUAD_COPPER:
797 return true;
798 default:
799 return false;
800 }
801}
802
803static netdev_features_t e1000_fix_features(struct net_device *netdev,
804 netdev_features_t features)
805{
806 /* Since there is no support for separate Rx/Tx vlan accel
807 * enable/disable make sure Tx flag is always in same state as Rx.
808 */
809 if (features & NETIF_F_HW_VLAN_CTAG_RX)
810 features |= NETIF_F_HW_VLAN_CTAG_TX;
811 else
812 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
813
814 return features;
815}
816
817static int e1000_set_features(struct net_device *netdev,
818 netdev_features_t features)
819{
820 struct e1000_adapter *adapter = netdev_priv(netdev);
821 netdev_features_t changed = features ^ netdev->features;
822
823 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
824 e1000_vlan_mode(netdev, features);
825
826 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL)))
827 return 0;
828
829 netdev->features = features;
830 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
831
832 if (netif_running(netdev))
833 e1000_reinit_locked(adapter);
834 else
835 e1000_reset(adapter);
836
837 return 0;
838}
839
840static const struct net_device_ops e1000_netdev_ops = {
841 .ndo_open = e1000_open,
842 .ndo_stop = e1000_close,
843 .ndo_start_xmit = e1000_xmit_frame,
844 .ndo_get_stats = e1000_get_stats,
845 .ndo_set_rx_mode = e1000_set_rx_mode,
846 .ndo_set_mac_address = e1000_set_mac,
847 .ndo_tx_timeout = e1000_tx_timeout,
848 .ndo_change_mtu = e1000_change_mtu,
849 .ndo_do_ioctl = e1000_ioctl,
850 .ndo_validate_addr = eth_validate_addr,
851 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
852 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
853#ifdef CONFIG_NET_POLL_CONTROLLER
854 .ndo_poll_controller = e1000_netpoll,
855#endif
856 .ndo_fix_features = e1000_fix_features,
857 .ndo_set_features = e1000_set_features,
858};
859
860/**
861 * e1000_init_hw_struct - initialize members of hw struct
862 * @adapter: board private struct
863 * @hw: structure used by e1000_hw.c
864 *
865 * Factors out initialization of the e1000_hw struct to its own function
866 * that can be called very early at init (just after struct allocation).
867 * Fields are initialized based on PCI device information and
868 * OS network device settings (MTU size).
869 * Returns negative error codes if MAC type setup fails.
870 */
871static int e1000_init_hw_struct(struct e1000_adapter *adapter,
872 struct e1000_hw *hw)
873{
874 struct pci_dev *pdev = adapter->pdev;
875
876 /* PCI config space info */
877 hw->vendor_id = pdev->vendor;
878 hw->device_id = pdev->device;
879 hw->subsystem_vendor_id = pdev->subsystem_vendor;
880 hw->subsystem_id = pdev->subsystem_device;
881 hw->revision_id = pdev->revision;
882
883 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
884
885 hw->max_frame_size = adapter->netdev->mtu +
886 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
887 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
888
889 /* identify the MAC */
890 if (e1000_set_mac_type(hw)) {
891 e_err(probe, "Unknown MAC Type\n");
892 return -EIO;
893 }
894
895 switch (hw->mac_type) {
896 default:
897 break;
898 case e1000_82541:
899 case e1000_82547:
900 case e1000_82541_rev_2:
901 case e1000_82547_rev_2:
902 hw->phy_init_script = 1;
903 break;
904 }
905
906 e1000_set_media_type(hw);
907 e1000_get_bus_info(hw);
908
909 hw->wait_autoneg_complete = false;
910 hw->tbi_compatibility_en = true;
911 hw->adaptive_ifs = true;
912
913 /* Copper options */
914
915 if (hw->media_type == e1000_media_type_copper) {
916 hw->mdix = AUTO_ALL_MODES;
917 hw->disable_polarity_correction = false;
918 hw->master_slave = E1000_MASTER_SLAVE;
919 }
920
921 return 0;
922}
923
924/**
925 * e1000_probe - Device Initialization Routine
926 * @pdev: PCI device information struct
927 * @ent: entry in e1000_pci_tbl
928 *
929 * Returns 0 on success, negative on failure
930 *
931 * e1000_probe initializes an adapter identified by a pci_dev structure.
932 * The OS initialization, configuring of the adapter private structure,
933 * and a hardware reset occur.
934 **/
935static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
936{
937 struct net_device *netdev;
938 struct e1000_adapter *adapter;
939 struct e1000_hw *hw;
940
941 static int cards_found = 0;
942 static int global_quad_port_a = 0; /* global ksp3 port a indication */
943 int i, err, pci_using_dac;
944 u16 eeprom_data = 0;
945 u16 tmp = 0;
946 u16 eeprom_apme_mask = E1000_EEPROM_APME;
947 int bars, need_ioport;
948
949 /* do not allocate ioport bars when not needed */
950 need_ioport = e1000_is_need_ioport(pdev);
951 if (need_ioport) {
952 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
953 err = pci_enable_device(pdev);
954 } else {
955 bars = pci_select_bars(pdev, IORESOURCE_MEM);
956 err = pci_enable_device_mem(pdev);
957 }
958 if (err)
959 return err;
960
961 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
962 if (err)
963 goto err_pci_reg;
964
965 pci_set_master(pdev);
966 err = pci_save_state(pdev);
967 if (err)
968 goto err_alloc_etherdev;
969
970 err = -ENOMEM;
971 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
972 if (!netdev)
973 goto err_alloc_etherdev;
974
975 SET_NETDEV_DEV(netdev, &pdev->dev);
976
977 pci_set_drvdata(pdev, netdev);
978 adapter = netdev_priv(netdev);
979 adapter->netdev = netdev;
980 adapter->pdev = pdev;
981 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
982 adapter->bars = bars;
983 adapter->need_ioport = need_ioport;
984
985 hw = &adapter->hw;
986 hw->back = adapter;
987
988 err = -EIO;
989 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
990 if (!hw->hw_addr)
991 goto err_ioremap;
992
993 if (adapter->need_ioport) {
994 for (i = BAR_1; i <= BAR_5; i++) {
995 if (pci_resource_len(pdev, i) == 0)
996 continue;
997 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
998 hw->io_base = pci_resource_start(pdev, i);
999 break;
1000 }
1001 }
1002 }
1003
1004 /* make ready for any if (hw->...) below */
1005 err = e1000_init_hw_struct(adapter, hw);
1006 if (err)
1007 goto err_sw_init;
1008
1009 /* there is a workaround being applied below that limits
1010 * 64-bit DMA addresses to 64-bit hardware. There are some
1011 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1012 */
1013 pci_using_dac = 0;
1014 if ((hw->bus_type == e1000_bus_type_pcix) &&
1015 !dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
1016 pci_using_dac = 1;
1017 } else {
1018 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1019 if (err) {
1020 pr_err("No usable DMA config, aborting\n");
1021 goto err_dma;
1022 }
1023 }
1024
1025 netdev->netdev_ops = &e1000_netdev_ops;
1026 e1000_set_ethtool_ops(netdev);
1027 netdev->watchdog_timeo = 5 * HZ;
1028 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1029
1030 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1031
1032 adapter->bd_number = cards_found;
1033
1034 /* setup the private structure */
1035
1036 err = e1000_sw_init(adapter);
1037 if (err)
1038 goto err_sw_init;
1039
1040 err = -EIO;
1041 if (hw->mac_type == e1000_ce4100) {
1042 hw->ce4100_gbe_mdio_base_virt =
1043 ioremap(pci_resource_start(pdev, BAR_1),
1044 pci_resource_len(pdev, BAR_1));
1045
1046 if (!hw->ce4100_gbe_mdio_base_virt)
1047 goto err_mdio_ioremap;
1048 }
1049
1050 if (hw->mac_type >= e1000_82543) {
1051 netdev->hw_features = NETIF_F_SG |
1052 NETIF_F_HW_CSUM |
1053 NETIF_F_HW_VLAN_CTAG_RX;
1054 netdev->features = NETIF_F_HW_VLAN_CTAG_TX |
1055 NETIF_F_HW_VLAN_CTAG_FILTER;
1056 }
1057
1058 if ((hw->mac_type >= e1000_82544) &&
1059 (hw->mac_type != e1000_82547))
1060 netdev->hw_features |= NETIF_F_TSO;
1061
1062 netdev->priv_flags |= IFF_SUPP_NOFCS;
1063
1064 netdev->features |= netdev->hw_features;
1065 netdev->hw_features |= (NETIF_F_RXCSUM |
1066 NETIF_F_RXALL |
1067 NETIF_F_RXFCS);
1068
1069 if (pci_using_dac) {
1070 netdev->features |= NETIF_F_HIGHDMA;
1071 netdev->vlan_features |= NETIF_F_HIGHDMA;
1072 }
1073
1074 netdev->vlan_features |= (NETIF_F_TSO |
1075 NETIF_F_HW_CSUM |
1076 NETIF_F_SG);
1077
1078 netdev->priv_flags |= IFF_UNICAST_FLT;
1079
1080 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1081
1082 /* initialize eeprom parameters */
1083 if (e1000_init_eeprom_params(hw)) {
1084 e_err(probe, "EEPROM initialization failed\n");
1085 goto err_eeprom;
1086 }
1087
1088 /* before reading the EEPROM, reset the controller to
1089 * put the device in a known good starting state
1090 */
1091
1092 e1000_reset_hw(hw);
1093
1094 /* make sure the EEPROM is good */
1095 if (e1000_validate_eeprom_checksum(hw) < 0) {
1096 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1097 e1000_dump_eeprom(adapter);
1098 /* set MAC address to all zeroes to invalidate and temporary
1099 * disable this device for the user. This blocks regular
1100 * traffic while still permitting ethtool ioctls from reaching
1101 * the hardware as well as allowing the user to run the
1102 * interface after manually setting a hw addr using
1103 * `ip set address`
1104 */
1105 memset(hw->mac_addr, 0, netdev->addr_len);
1106 } else {
1107 /* copy the MAC address out of the EEPROM */
1108 if (e1000_read_mac_addr(hw))
1109 e_err(probe, "EEPROM Read Error\n");
1110 }
1111 /* don't block initalization here due to bad MAC address */
1112 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1113
1114 if (!is_valid_ether_addr(netdev->dev_addr))
1115 e_err(probe, "Invalid MAC Address\n");
1116
1117
1118 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1119 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1120 e1000_82547_tx_fifo_stall_task);
1121 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1122 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1123
1124 e1000_check_options(adapter);
1125
1126 /* Initial Wake on LAN setting
1127 * If APM wake is enabled in the EEPROM,
1128 * enable the ACPI Magic Packet filter
1129 */
1130
1131 switch (hw->mac_type) {
1132 case e1000_82542_rev2_0:
1133 case e1000_82542_rev2_1:
1134 case e1000_82543:
1135 break;
1136 case e1000_82544:
1137 e1000_read_eeprom(hw,
1138 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1139 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1140 break;
1141 case e1000_82546:
1142 case e1000_82546_rev_3:
1143 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1144 e1000_read_eeprom(hw,
1145 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1146 break;
1147 }
1148 /* Fall Through */
1149 default:
1150 e1000_read_eeprom(hw,
1151 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1152 break;
1153 }
1154 if (eeprom_data & eeprom_apme_mask)
1155 adapter->eeprom_wol |= E1000_WUFC_MAG;
1156
1157 /* now that we have the eeprom settings, apply the special cases
1158 * where the eeprom may be wrong or the board simply won't support
1159 * wake on lan on a particular port
1160 */
1161 switch (pdev->device) {
1162 case E1000_DEV_ID_82546GB_PCIE:
1163 adapter->eeprom_wol = 0;
1164 break;
1165 case E1000_DEV_ID_82546EB_FIBER:
1166 case E1000_DEV_ID_82546GB_FIBER:
1167 /* Wake events only supported on port A for dual fiber
1168 * regardless of eeprom setting
1169 */
1170 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1171 adapter->eeprom_wol = 0;
1172 break;
1173 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1174 /* if quad port adapter, disable WoL on all but port A */
1175 if (global_quad_port_a != 0)
1176 adapter->eeprom_wol = 0;
1177 else
1178 adapter->quad_port_a = true;
1179 /* Reset for multiple quad port adapters */
1180 if (++global_quad_port_a == 4)
1181 global_quad_port_a = 0;
1182 break;
1183 }
1184
1185 /* initialize the wol settings based on the eeprom settings */
1186 adapter->wol = adapter->eeprom_wol;
1187 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1188
1189 /* Auto detect PHY address */
1190 if (hw->mac_type == e1000_ce4100) {
1191 for (i = 0; i < 32; i++) {
1192 hw->phy_addr = i;
1193 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1194 if (tmp == 0 || tmp == 0xFF) {
1195 if (i == 31)
1196 goto err_eeprom;
1197 continue;
1198 } else
1199 break;
1200 }
1201 }
1202
1203 /* reset the hardware with the new settings */
1204 e1000_reset(adapter);
1205
1206 strcpy(netdev->name, "eth%d");
1207 err = register_netdev(netdev);
1208 if (err)
1209 goto err_register;
1210
1211 e1000_vlan_filter_on_off(adapter, false);
1212
1213 /* print bus type/speed/width info */
1214 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1215 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1216 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1217 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1218 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1219 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1220 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1221 netdev->dev_addr);
1222
1223 /* carrier off reporting is important to ethtool even BEFORE open */
1224 netif_carrier_off(netdev);
1225
1226 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1227
1228 cards_found++;
1229 return 0;
1230
1231err_register:
1232err_eeprom:
1233 e1000_phy_hw_reset(hw);
1234
1235 if (hw->flash_address)
1236 iounmap(hw->flash_address);
1237 kfree(adapter->tx_ring);
1238 kfree(adapter->rx_ring);
1239err_dma:
1240err_sw_init:
1241err_mdio_ioremap:
1242 iounmap(hw->ce4100_gbe_mdio_base_virt);
1243 iounmap(hw->hw_addr);
1244err_ioremap:
1245 free_netdev(netdev);
1246err_alloc_etherdev:
1247 pci_release_selected_regions(pdev, bars);
1248err_pci_reg:
1249 pci_disable_device(pdev);
1250 return err;
1251}
1252
1253/**
1254 * e1000_remove - Device Removal Routine
1255 * @pdev: PCI device information struct
1256 *
1257 * e1000_remove is called by the PCI subsystem to alert the driver
1258 * that it should release a PCI device. The could be caused by a
1259 * Hot-Plug event, or because the driver is going to be removed from
1260 * memory.
1261 **/
1262static void e1000_remove(struct pci_dev *pdev)
1263{
1264 struct net_device *netdev = pci_get_drvdata(pdev);
1265 struct e1000_adapter *adapter = netdev_priv(netdev);
1266 struct e1000_hw *hw = &adapter->hw;
1267
1268 e1000_down_and_stop(adapter);
1269 e1000_release_manageability(adapter);
1270
1271 unregister_netdev(netdev);
1272
1273 e1000_phy_hw_reset(hw);
1274
1275 kfree(adapter->tx_ring);
1276 kfree(adapter->rx_ring);
1277
1278 if (hw->mac_type == e1000_ce4100)
1279 iounmap(hw->ce4100_gbe_mdio_base_virt);
1280 iounmap(hw->hw_addr);
1281 if (hw->flash_address)
1282 iounmap(hw->flash_address);
1283 pci_release_selected_regions(pdev, adapter->bars);
1284
1285 free_netdev(netdev);
1286
1287 pci_disable_device(pdev);
1288}
1289
1290/**
1291 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1292 * @adapter: board private structure to initialize
1293 *
1294 * e1000_sw_init initializes the Adapter private data structure.
1295 * e1000_init_hw_struct MUST be called before this function
1296 **/
1297static int e1000_sw_init(struct e1000_adapter *adapter)
1298{
1299 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1300
1301 adapter->num_tx_queues = 1;
1302 adapter->num_rx_queues = 1;
1303
1304 if (e1000_alloc_queues(adapter)) {
1305 e_err(probe, "Unable to allocate memory for queues\n");
1306 return -ENOMEM;
1307 }
1308
1309 /* Explicitly disable IRQ since the NIC can be in any state. */
1310 e1000_irq_disable(adapter);
1311
1312 spin_lock_init(&adapter->stats_lock);
1313
1314 set_bit(__E1000_DOWN, &adapter->flags);
1315
1316 return 0;
1317}
1318
1319/**
1320 * e1000_alloc_queues - Allocate memory for all rings
1321 * @adapter: board private structure to initialize
1322 *
1323 * We allocate one ring per queue at run-time since we don't know the
1324 * number of queues at compile-time.
1325 **/
1326static int e1000_alloc_queues(struct e1000_adapter *adapter)
1327{
1328 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1329 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1330 if (!adapter->tx_ring)
1331 return -ENOMEM;
1332
1333 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1334 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1335 if (!adapter->rx_ring) {
1336 kfree(adapter->tx_ring);
1337 return -ENOMEM;
1338 }
1339
1340 return E1000_SUCCESS;
1341}
1342
1343/**
1344 * e1000_open - Called when a network interface is made active
1345 * @netdev: network interface device structure
1346 *
1347 * Returns 0 on success, negative value on failure
1348 *
1349 * The open entry point is called when a network interface is made
1350 * active by the system (IFF_UP). At this point all resources needed
1351 * for transmit and receive operations are allocated, the interrupt
1352 * handler is registered with the OS, the watchdog task is started,
1353 * and the stack is notified that the interface is ready.
1354 **/
1355static int e1000_open(struct net_device *netdev)
1356{
1357 struct e1000_adapter *adapter = netdev_priv(netdev);
1358 struct e1000_hw *hw = &adapter->hw;
1359 int err;
1360
1361 /* disallow open during test */
1362 if (test_bit(__E1000_TESTING, &adapter->flags))
1363 return -EBUSY;
1364
1365 netif_carrier_off(netdev);
1366
1367 /* allocate transmit descriptors */
1368 err = e1000_setup_all_tx_resources(adapter);
1369 if (err)
1370 goto err_setup_tx;
1371
1372 /* allocate receive descriptors */
1373 err = e1000_setup_all_rx_resources(adapter);
1374 if (err)
1375 goto err_setup_rx;
1376
1377 e1000_power_up_phy(adapter);
1378
1379 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1380 if ((hw->mng_cookie.status &
1381 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1382 e1000_update_mng_vlan(adapter);
1383 }
1384
1385 /* before we allocate an interrupt, we must be ready to handle it.
1386 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1387 * as soon as we call pci_request_irq, so we have to setup our
1388 * clean_rx handler before we do so.
1389 */
1390 e1000_configure(adapter);
1391
1392 err = e1000_request_irq(adapter);
1393 if (err)
1394 goto err_req_irq;
1395
1396 /* From here on the code is the same as e1000_up() */
1397 clear_bit(__E1000_DOWN, &adapter->flags);
1398
1399 napi_enable(&adapter->napi);
1400
1401 e1000_irq_enable(adapter);
1402
1403 netif_start_queue(netdev);
1404
1405 /* fire a link status change interrupt to start the watchdog */
1406 ew32(ICS, E1000_ICS_LSC);
1407
1408 return E1000_SUCCESS;
1409
1410err_req_irq:
1411 e1000_power_down_phy(adapter);
1412 e1000_free_all_rx_resources(adapter);
1413err_setup_rx:
1414 e1000_free_all_tx_resources(adapter);
1415err_setup_tx:
1416 e1000_reset(adapter);
1417
1418 return err;
1419}
1420
1421/**
1422 * e1000_close - Disables a network interface
1423 * @netdev: network interface device structure
1424 *
1425 * Returns 0, this is not allowed to fail
1426 *
1427 * The close entry point is called when an interface is de-activated
1428 * by the OS. The hardware is still under the drivers control, but
1429 * needs to be disabled. A global MAC reset is issued to stop the
1430 * hardware, and all transmit and receive resources are freed.
1431 **/
1432static int e1000_close(struct net_device *netdev)
1433{
1434 struct e1000_adapter *adapter = netdev_priv(netdev);
1435 struct e1000_hw *hw = &adapter->hw;
1436 int count = E1000_CHECK_RESET_COUNT;
1437
1438 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
1439 usleep_range(10000, 20000);
1440
1441 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1442 e1000_down(adapter);
1443 e1000_power_down_phy(adapter);
1444 e1000_free_irq(adapter);
1445
1446 e1000_free_all_tx_resources(adapter);
1447 e1000_free_all_rx_resources(adapter);
1448
1449 /* kill manageability vlan ID if supported, but not if a vlan with
1450 * the same ID is registered on the host OS (let 8021q kill it)
1451 */
1452 if ((hw->mng_cookie.status &
1453 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1454 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1455 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
1456 adapter->mng_vlan_id);
1457 }
1458
1459 return 0;
1460}
1461
1462/**
1463 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1464 * @adapter: address of board private structure
1465 * @start: address of beginning of memory
1466 * @len: length of memory
1467 **/
1468static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1469 unsigned long len)
1470{
1471 struct e1000_hw *hw = &adapter->hw;
1472 unsigned long begin = (unsigned long)start;
1473 unsigned long end = begin + len;
1474
1475 /* First rev 82545 and 82546 need to not allow any memory
1476 * write location to cross 64k boundary due to errata 23
1477 */
1478 if (hw->mac_type == e1000_82545 ||
1479 hw->mac_type == e1000_ce4100 ||
1480 hw->mac_type == e1000_82546) {
1481 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1482 }
1483
1484 return true;
1485}
1486
1487/**
1488 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1489 * @adapter: board private structure
1490 * @txdr: tx descriptor ring (for a specific queue) to setup
1491 *
1492 * Return 0 on success, negative on failure
1493 **/
1494static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1495 struct e1000_tx_ring *txdr)
1496{
1497 struct pci_dev *pdev = adapter->pdev;
1498 int size;
1499
1500 size = sizeof(struct e1000_buffer) * txdr->count;
1501 txdr->buffer_info = vzalloc(size);
1502 if (!txdr->buffer_info)
1503 return -ENOMEM;
1504
1505 /* round up to nearest 4K */
1506
1507 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1508 txdr->size = ALIGN(txdr->size, 4096);
1509
1510 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1511 GFP_KERNEL);
1512 if (!txdr->desc) {
1513setup_tx_desc_die:
1514 vfree(txdr->buffer_info);
1515 return -ENOMEM;
1516 }
1517
1518 /* Fix for errata 23, can't cross 64kB boundary */
1519 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1520 void *olddesc = txdr->desc;
1521 dma_addr_t olddma = txdr->dma;
1522 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1523 txdr->size, txdr->desc);
1524 /* Try again, without freeing the previous */
1525 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1526 &txdr->dma, GFP_KERNEL);
1527 /* Failed allocation, critical failure */
1528 if (!txdr->desc) {
1529 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1530 olddma);
1531 goto setup_tx_desc_die;
1532 }
1533
1534 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1535 /* give up */
1536 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1537 txdr->dma);
1538 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1539 olddma);
1540 e_err(probe, "Unable to allocate aligned memory "
1541 "for the transmit descriptor ring\n");
1542 vfree(txdr->buffer_info);
1543 return -ENOMEM;
1544 } else {
1545 /* Free old allocation, new allocation was successful */
1546 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1547 olddma);
1548 }
1549 }
1550 memset(txdr->desc, 0, txdr->size);
1551
1552 txdr->next_to_use = 0;
1553 txdr->next_to_clean = 0;
1554
1555 return 0;
1556}
1557
1558/**
1559 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1560 * (Descriptors) for all queues
1561 * @adapter: board private structure
1562 *
1563 * Return 0 on success, negative on failure
1564 **/
1565int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1566{
1567 int i, err = 0;
1568
1569 for (i = 0; i < adapter->num_tx_queues; i++) {
1570 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1571 if (err) {
1572 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1573 for (i-- ; i >= 0; i--)
1574 e1000_free_tx_resources(adapter,
1575 &adapter->tx_ring[i]);
1576 break;
1577 }
1578 }
1579
1580 return err;
1581}
1582
1583/**
1584 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1585 * @adapter: board private structure
1586 *
1587 * Configure the Tx unit of the MAC after a reset.
1588 **/
1589static void e1000_configure_tx(struct e1000_adapter *adapter)
1590{
1591 u64 tdba;
1592 struct e1000_hw *hw = &adapter->hw;
1593 u32 tdlen, tctl, tipg;
1594 u32 ipgr1, ipgr2;
1595
1596 /* Setup the HW Tx Head and Tail descriptor pointers */
1597
1598 switch (adapter->num_tx_queues) {
1599 case 1:
1600 default:
1601 tdba = adapter->tx_ring[0].dma;
1602 tdlen = adapter->tx_ring[0].count *
1603 sizeof(struct e1000_tx_desc);
1604 ew32(TDLEN, tdlen);
1605 ew32(TDBAH, (tdba >> 32));
1606 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1607 ew32(TDT, 0);
1608 ew32(TDH, 0);
1609 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ?
1610 E1000_TDH : E1000_82542_TDH);
1611 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ?
1612 E1000_TDT : E1000_82542_TDT);
1613 break;
1614 }
1615
1616 /* Set the default values for the Tx Inter Packet Gap timer */
1617 if ((hw->media_type == e1000_media_type_fiber ||
1618 hw->media_type == e1000_media_type_internal_serdes))
1619 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1620 else
1621 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1622
1623 switch (hw->mac_type) {
1624 case e1000_82542_rev2_0:
1625 case e1000_82542_rev2_1:
1626 tipg = DEFAULT_82542_TIPG_IPGT;
1627 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1628 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1629 break;
1630 default:
1631 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1632 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1633 break;
1634 }
1635 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1636 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1637 ew32(TIPG, tipg);
1638
1639 /* Set the Tx Interrupt Delay register */
1640
1641 ew32(TIDV, adapter->tx_int_delay);
1642 if (hw->mac_type >= e1000_82540)
1643 ew32(TADV, adapter->tx_abs_int_delay);
1644
1645 /* Program the Transmit Control Register */
1646
1647 tctl = er32(TCTL);
1648 tctl &= ~E1000_TCTL_CT;
1649 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1650 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1651
1652 e1000_config_collision_dist(hw);
1653
1654 /* Setup Transmit Descriptor Settings for eop descriptor */
1655 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1656
1657 /* only set IDE if we are delaying interrupts using the timers */
1658 if (adapter->tx_int_delay)
1659 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1660
1661 if (hw->mac_type < e1000_82543)
1662 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1663 else
1664 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1665
1666 /* Cache if we're 82544 running in PCI-X because we'll
1667 * need this to apply a workaround later in the send path.
1668 */
1669 if (hw->mac_type == e1000_82544 &&
1670 hw->bus_type == e1000_bus_type_pcix)
1671 adapter->pcix_82544 = true;
1672
1673 ew32(TCTL, tctl);
1674
1675}
1676
1677/**
1678 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1679 * @adapter: board private structure
1680 * @rxdr: rx descriptor ring (for a specific queue) to setup
1681 *
1682 * Returns 0 on success, negative on failure
1683 **/
1684static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1685 struct e1000_rx_ring *rxdr)
1686{
1687 struct pci_dev *pdev = adapter->pdev;
1688 int size, desc_len;
1689
1690 size = sizeof(struct e1000_buffer) * rxdr->count;
1691 rxdr->buffer_info = vzalloc(size);
1692 if (!rxdr->buffer_info)
1693 return -ENOMEM;
1694
1695 desc_len = sizeof(struct e1000_rx_desc);
1696
1697 /* Round up to nearest 4K */
1698
1699 rxdr->size = rxdr->count * desc_len;
1700 rxdr->size = ALIGN(rxdr->size, 4096);
1701
1702 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1703 GFP_KERNEL);
1704 if (!rxdr->desc) {
1705setup_rx_desc_die:
1706 vfree(rxdr->buffer_info);
1707 return -ENOMEM;
1708 }
1709
1710 /* Fix for errata 23, can't cross 64kB boundary */
1711 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1712 void *olddesc = rxdr->desc;
1713 dma_addr_t olddma = rxdr->dma;
1714 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1715 rxdr->size, rxdr->desc);
1716 /* Try again, without freeing the previous */
1717 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1718 &rxdr->dma, GFP_KERNEL);
1719 /* Failed allocation, critical failure */
1720 if (!rxdr->desc) {
1721 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1722 olddma);
1723 goto setup_rx_desc_die;
1724 }
1725
1726 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1727 /* give up */
1728 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1729 rxdr->dma);
1730 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1731 olddma);
1732 e_err(probe, "Unable to allocate aligned memory for "
1733 "the Rx descriptor ring\n");
1734 goto setup_rx_desc_die;
1735 } else {
1736 /* Free old allocation, new allocation was successful */
1737 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1738 olddma);
1739 }
1740 }
1741 memset(rxdr->desc, 0, rxdr->size);
1742
1743 rxdr->next_to_clean = 0;
1744 rxdr->next_to_use = 0;
1745 rxdr->rx_skb_top = NULL;
1746
1747 return 0;
1748}
1749
1750/**
1751 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1752 * (Descriptors) for all queues
1753 * @adapter: board private structure
1754 *
1755 * Return 0 on success, negative on failure
1756 **/
1757int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1758{
1759 int i, err = 0;
1760
1761 for (i = 0; i < adapter->num_rx_queues; i++) {
1762 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1763 if (err) {
1764 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1765 for (i-- ; i >= 0; i--)
1766 e1000_free_rx_resources(adapter,
1767 &adapter->rx_ring[i]);
1768 break;
1769 }
1770 }
1771
1772 return err;
1773}
1774
1775/**
1776 * e1000_setup_rctl - configure the receive control registers
1777 * @adapter: Board private structure
1778 **/
1779static void e1000_setup_rctl(struct e1000_adapter *adapter)
1780{
1781 struct e1000_hw *hw = &adapter->hw;
1782 u32 rctl;
1783
1784 rctl = er32(RCTL);
1785
1786 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1787
1788 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1789 E1000_RCTL_RDMTS_HALF |
1790 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1791
1792 if (hw->tbi_compatibility_on == 1)
1793 rctl |= E1000_RCTL_SBP;
1794 else
1795 rctl &= ~E1000_RCTL_SBP;
1796
1797 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1798 rctl &= ~E1000_RCTL_LPE;
1799 else
1800 rctl |= E1000_RCTL_LPE;
1801
1802 /* Setup buffer sizes */
1803 rctl &= ~E1000_RCTL_SZ_4096;
1804 rctl |= E1000_RCTL_BSEX;
1805 switch (adapter->rx_buffer_len) {
1806 case E1000_RXBUFFER_2048:
1807 default:
1808 rctl |= E1000_RCTL_SZ_2048;
1809 rctl &= ~E1000_RCTL_BSEX;
1810 break;
1811 case E1000_RXBUFFER_4096:
1812 rctl |= E1000_RCTL_SZ_4096;
1813 break;
1814 case E1000_RXBUFFER_8192:
1815 rctl |= E1000_RCTL_SZ_8192;
1816 break;
1817 case E1000_RXBUFFER_16384:
1818 rctl |= E1000_RCTL_SZ_16384;
1819 break;
1820 }
1821
1822 /* This is useful for sniffing bad packets. */
1823 if (adapter->netdev->features & NETIF_F_RXALL) {
1824 /* UPE and MPE will be handled by normal PROMISC logic
1825 * in e1000e_set_rx_mode
1826 */
1827 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
1828 E1000_RCTL_BAM | /* RX All Bcast Pkts */
1829 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
1830
1831 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
1832 E1000_RCTL_DPF | /* Allow filtered pause */
1833 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
1834 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1835 * and that breaks VLANs.
1836 */
1837 }
1838
1839 ew32(RCTL, rctl);
1840}
1841
1842/**
1843 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1844 * @adapter: board private structure
1845 *
1846 * Configure the Rx unit of the MAC after a reset.
1847 **/
1848static void e1000_configure_rx(struct e1000_adapter *adapter)
1849{
1850 u64 rdba;
1851 struct e1000_hw *hw = &adapter->hw;
1852 u32 rdlen, rctl, rxcsum;
1853
1854 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1855 rdlen = adapter->rx_ring[0].count *
1856 sizeof(struct e1000_rx_desc);
1857 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1858 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1859 } else {
1860 rdlen = adapter->rx_ring[0].count *
1861 sizeof(struct e1000_rx_desc);
1862 adapter->clean_rx = e1000_clean_rx_irq;
1863 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1864 }
1865
1866 /* disable receives while setting up the descriptors */
1867 rctl = er32(RCTL);
1868 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1869
1870 /* set the Receive Delay Timer Register */
1871 ew32(RDTR, adapter->rx_int_delay);
1872
1873 if (hw->mac_type >= e1000_82540) {
1874 ew32(RADV, adapter->rx_abs_int_delay);
1875 if (adapter->itr_setting != 0)
1876 ew32(ITR, 1000000000 / (adapter->itr * 256));
1877 }
1878
1879 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1880 * the Base and Length of the Rx Descriptor Ring
1881 */
1882 switch (adapter->num_rx_queues) {
1883 case 1:
1884 default:
1885 rdba = adapter->rx_ring[0].dma;
1886 ew32(RDLEN, rdlen);
1887 ew32(RDBAH, (rdba >> 32));
1888 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1889 ew32(RDT, 0);
1890 ew32(RDH, 0);
1891 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ?
1892 E1000_RDH : E1000_82542_RDH);
1893 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ?
1894 E1000_RDT : E1000_82542_RDT);
1895 break;
1896 }
1897
1898 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1899 if (hw->mac_type >= e1000_82543) {
1900 rxcsum = er32(RXCSUM);
1901 if (adapter->rx_csum)
1902 rxcsum |= E1000_RXCSUM_TUOFL;
1903 else
1904 /* don't need to clear IPPCSE as it defaults to 0 */
1905 rxcsum &= ~E1000_RXCSUM_TUOFL;
1906 ew32(RXCSUM, rxcsum);
1907 }
1908
1909 /* Enable Receives */
1910 ew32(RCTL, rctl | E1000_RCTL_EN);
1911}
1912
1913/**
1914 * e1000_free_tx_resources - Free Tx Resources per Queue
1915 * @adapter: board private structure
1916 * @tx_ring: Tx descriptor ring for a specific queue
1917 *
1918 * Free all transmit software resources
1919 **/
1920static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1921 struct e1000_tx_ring *tx_ring)
1922{
1923 struct pci_dev *pdev = adapter->pdev;
1924
1925 e1000_clean_tx_ring(adapter, tx_ring);
1926
1927 vfree(tx_ring->buffer_info);
1928 tx_ring->buffer_info = NULL;
1929
1930 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1931 tx_ring->dma);
1932
1933 tx_ring->desc = NULL;
1934}
1935
1936/**
1937 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1938 * @adapter: board private structure
1939 *
1940 * Free all transmit software resources
1941 **/
1942void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1943{
1944 int i;
1945
1946 for (i = 0; i < adapter->num_tx_queues; i++)
1947 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1948}
1949
1950static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1951 struct e1000_buffer *buffer_info)
1952{
1953 if (buffer_info->dma) {
1954 if (buffer_info->mapped_as_page)
1955 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1956 buffer_info->length, DMA_TO_DEVICE);
1957 else
1958 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1959 buffer_info->length,
1960 DMA_TO_DEVICE);
1961 buffer_info->dma = 0;
1962 }
1963 if (buffer_info->skb) {
1964 dev_kfree_skb_any(buffer_info->skb);
1965 buffer_info->skb = NULL;
1966 }
1967 buffer_info->time_stamp = 0;
1968 /* buffer_info must be completely set up in the transmit path */
1969}
1970
1971/**
1972 * e1000_clean_tx_ring - Free Tx Buffers
1973 * @adapter: board private structure
1974 * @tx_ring: ring to be cleaned
1975 **/
1976static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1977 struct e1000_tx_ring *tx_ring)
1978{
1979 struct e1000_hw *hw = &adapter->hw;
1980 struct e1000_buffer *buffer_info;
1981 unsigned long size;
1982 unsigned int i;
1983
1984 /* Free all the Tx ring sk_buffs */
1985
1986 for (i = 0; i < tx_ring->count; i++) {
1987 buffer_info = &tx_ring->buffer_info[i];
1988 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1989 }
1990
1991 netdev_reset_queue(adapter->netdev);
1992 size = sizeof(struct e1000_buffer) * tx_ring->count;
1993 memset(tx_ring->buffer_info, 0, size);
1994
1995 /* Zero out the descriptor ring */
1996
1997 memset(tx_ring->desc, 0, tx_ring->size);
1998
1999 tx_ring->next_to_use = 0;
2000 tx_ring->next_to_clean = 0;
2001 tx_ring->last_tx_tso = false;
2002
2003 writel(0, hw->hw_addr + tx_ring->tdh);
2004 writel(0, hw->hw_addr + tx_ring->tdt);
2005}
2006
2007/**
2008 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2009 * @adapter: board private structure
2010 **/
2011static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2012{
2013 int i;
2014
2015 for (i = 0; i < adapter->num_tx_queues; i++)
2016 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2017}
2018
2019/**
2020 * e1000_free_rx_resources - Free Rx Resources
2021 * @adapter: board private structure
2022 * @rx_ring: ring to clean the resources from
2023 *
2024 * Free all receive software resources
2025 **/
2026static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2027 struct e1000_rx_ring *rx_ring)
2028{
2029 struct pci_dev *pdev = adapter->pdev;
2030
2031 e1000_clean_rx_ring(adapter, rx_ring);
2032
2033 vfree(rx_ring->buffer_info);
2034 rx_ring->buffer_info = NULL;
2035
2036 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2037 rx_ring->dma);
2038
2039 rx_ring->desc = NULL;
2040}
2041
2042/**
2043 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2044 * @adapter: board private structure
2045 *
2046 * Free all receive software resources
2047 **/
2048void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2049{
2050 int i;
2051
2052 for (i = 0; i < adapter->num_rx_queues; i++)
2053 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2054}
2055
2056/**
2057 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2058 * @adapter: board private structure
2059 * @rx_ring: ring to free buffers from
2060 **/
2061static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2062 struct e1000_rx_ring *rx_ring)
2063{
2064 struct e1000_hw *hw = &adapter->hw;
2065 struct e1000_buffer *buffer_info;
2066 struct pci_dev *pdev = adapter->pdev;
2067 unsigned long size;
2068 unsigned int i;
2069
2070 /* Free all the Rx ring sk_buffs */
2071 for (i = 0; i < rx_ring->count; i++) {
2072 buffer_info = &rx_ring->buffer_info[i];
2073 if (buffer_info->dma &&
2074 adapter->clean_rx == e1000_clean_rx_irq) {
2075 dma_unmap_single(&pdev->dev, buffer_info->dma,
2076 buffer_info->length,
2077 DMA_FROM_DEVICE);
2078 } else if (buffer_info->dma &&
2079 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2080 dma_unmap_page(&pdev->dev, buffer_info->dma,
2081 buffer_info->length,
2082 DMA_FROM_DEVICE);
2083 }
2084
2085 buffer_info->dma = 0;
2086 if (buffer_info->page) {
2087 put_page(buffer_info->page);
2088 buffer_info->page = NULL;
2089 }
2090 if (buffer_info->skb) {
2091 dev_kfree_skb(buffer_info->skb);
2092 buffer_info->skb = NULL;
2093 }
2094 }
2095
2096 /* there also may be some cached data from a chained receive */
2097 if (rx_ring->rx_skb_top) {
2098 dev_kfree_skb(rx_ring->rx_skb_top);
2099 rx_ring->rx_skb_top = NULL;
2100 }
2101
2102 size = sizeof(struct e1000_buffer) * rx_ring->count;
2103 memset(rx_ring->buffer_info, 0, size);
2104
2105 /* Zero out the descriptor ring */
2106 memset(rx_ring->desc, 0, rx_ring->size);
2107
2108 rx_ring->next_to_clean = 0;
2109 rx_ring->next_to_use = 0;
2110
2111 writel(0, hw->hw_addr + rx_ring->rdh);
2112 writel(0, hw->hw_addr + rx_ring->rdt);
2113}
2114
2115/**
2116 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2117 * @adapter: board private structure
2118 **/
2119static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2120{
2121 int i;
2122
2123 for (i = 0; i < adapter->num_rx_queues; i++)
2124 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2125}
2126
2127/* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2128 * and memory write and invalidate disabled for certain operations
2129 */
2130static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2131{
2132 struct e1000_hw *hw = &adapter->hw;
2133 struct net_device *netdev = adapter->netdev;
2134 u32 rctl;
2135
2136 e1000_pci_clear_mwi(hw);
2137
2138 rctl = er32(RCTL);
2139 rctl |= E1000_RCTL_RST;
2140 ew32(RCTL, rctl);
2141 E1000_WRITE_FLUSH();
2142 mdelay(5);
2143
2144 if (netif_running(netdev))
2145 e1000_clean_all_rx_rings(adapter);
2146}
2147
2148static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2149{
2150 struct e1000_hw *hw = &adapter->hw;
2151 struct net_device *netdev = adapter->netdev;
2152 u32 rctl;
2153
2154 rctl = er32(RCTL);
2155 rctl &= ~E1000_RCTL_RST;
2156 ew32(RCTL, rctl);
2157 E1000_WRITE_FLUSH();
2158 mdelay(5);
2159
2160 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2161 e1000_pci_set_mwi(hw);
2162
2163 if (netif_running(netdev)) {
2164 /* No need to loop, because 82542 supports only 1 queue */
2165 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2166 e1000_configure_rx(adapter);
2167 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2168 }
2169}
2170
2171/**
2172 * e1000_set_mac - Change the Ethernet Address of the NIC
2173 * @netdev: network interface device structure
2174 * @p: pointer to an address structure
2175 *
2176 * Returns 0 on success, negative on failure
2177 **/
2178static int e1000_set_mac(struct net_device *netdev, void *p)
2179{
2180 struct e1000_adapter *adapter = netdev_priv(netdev);
2181 struct e1000_hw *hw = &adapter->hw;
2182 struct sockaddr *addr = p;
2183
2184 if (!is_valid_ether_addr(addr->sa_data))
2185 return -EADDRNOTAVAIL;
2186
2187 /* 82542 2.0 needs to be in reset to write receive address registers */
2188
2189 if (hw->mac_type == e1000_82542_rev2_0)
2190 e1000_enter_82542_rst(adapter);
2191
2192 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2193 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2194
2195 e1000_rar_set(hw, hw->mac_addr, 0);
2196
2197 if (hw->mac_type == e1000_82542_rev2_0)
2198 e1000_leave_82542_rst(adapter);
2199
2200 return 0;
2201}
2202
2203/**
2204 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2205 * @netdev: network interface device structure
2206 *
2207 * The set_rx_mode entry point is called whenever the unicast or multicast
2208 * address lists or the network interface flags are updated. This routine is
2209 * responsible for configuring the hardware for proper unicast, multicast,
2210 * promiscuous mode, and all-multi behavior.
2211 **/
2212static void e1000_set_rx_mode(struct net_device *netdev)
2213{
2214 struct e1000_adapter *adapter = netdev_priv(netdev);
2215 struct e1000_hw *hw = &adapter->hw;
2216 struct netdev_hw_addr *ha;
2217 bool use_uc = false;
2218 u32 rctl;
2219 u32 hash_value;
2220 int i, rar_entries = E1000_RAR_ENTRIES;
2221 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2222 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2223
2224 if (!mcarray)
2225 return;
2226
2227 /* Check for Promiscuous and All Multicast modes */
2228
2229 rctl = er32(RCTL);
2230
2231 if (netdev->flags & IFF_PROMISC) {
2232 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2233 rctl &= ~E1000_RCTL_VFE;
2234 } else {
2235 if (netdev->flags & IFF_ALLMULTI)
2236 rctl |= E1000_RCTL_MPE;
2237 else
2238 rctl &= ~E1000_RCTL_MPE;
2239 /* Enable VLAN filter if there is a VLAN */
2240 if (e1000_vlan_used(adapter))
2241 rctl |= E1000_RCTL_VFE;
2242 }
2243
2244 if (netdev_uc_count(netdev) > rar_entries - 1) {
2245 rctl |= E1000_RCTL_UPE;
2246 } else if (!(netdev->flags & IFF_PROMISC)) {
2247 rctl &= ~E1000_RCTL_UPE;
2248 use_uc = true;
2249 }
2250
2251 ew32(RCTL, rctl);
2252
2253 /* 82542 2.0 needs to be in reset to write receive address registers */
2254
2255 if (hw->mac_type == e1000_82542_rev2_0)
2256 e1000_enter_82542_rst(adapter);
2257
2258 /* load the first 14 addresses into the exact filters 1-14. Unicast
2259 * addresses take precedence to avoid disabling unicast filtering
2260 * when possible.
2261 *
2262 * RAR 0 is used for the station MAC address
2263 * if there are not 14 addresses, go ahead and clear the filters
2264 */
2265 i = 1;
2266 if (use_uc)
2267 netdev_for_each_uc_addr(ha, netdev) {
2268 if (i == rar_entries)
2269 break;
2270 e1000_rar_set(hw, ha->addr, i++);
2271 }
2272
2273 netdev_for_each_mc_addr(ha, netdev) {
2274 if (i == rar_entries) {
2275 /* load any remaining addresses into the hash table */
2276 u32 hash_reg, hash_bit, mta;
2277 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2278 hash_reg = (hash_value >> 5) & 0x7F;
2279 hash_bit = hash_value & 0x1F;
2280 mta = (1 << hash_bit);
2281 mcarray[hash_reg] |= mta;
2282 } else {
2283 e1000_rar_set(hw, ha->addr, i++);
2284 }
2285 }
2286
2287 for (; i < rar_entries; i++) {
2288 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2289 E1000_WRITE_FLUSH();
2290 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2291 E1000_WRITE_FLUSH();
2292 }
2293
2294 /* write the hash table completely, write from bottom to avoid
2295 * both stupid write combining chipsets, and flushing each write
2296 */
2297 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2298 /* If we are on an 82544 has an errata where writing odd
2299 * offsets overwrites the previous even offset, but writing
2300 * backwards over the range solves the issue by always
2301 * writing the odd offset first
2302 */
2303 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2304 }
2305 E1000_WRITE_FLUSH();
2306
2307 if (hw->mac_type == e1000_82542_rev2_0)
2308 e1000_leave_82542_rst(adapter);
2309
2310 kfree(mcarray);
2311}
2312
2313/**
2314 * e1000_update_phy_info_task - get phy info
2315 * @work: work struct contained inside adapter struct
2316 *
2317 * Need to wait a few seconds after link up to get diagnostic information from
2318 * the phy
2319 */
2320static void e1000_update_phy_info_task(struct work_struct *work)
2321{
2322 struct e1000_adapter *adapter = container_of(work,
2323 struct e1000_adapter,
2324 phy_info_task.work);
2325
2326 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2327}
2328
2329/**
2330 * e1000_82547_tx_fifo_stall_task - task to complete work
2331 * @work: work struct contained inside adapter struct
2332 **/
2333static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2334{
2335 struct e1000_adapter *adapter = container_of(work,
2336 struct e1000_adapter,
2337 fifo_stall_task.work);
2338 struct e1000_hw *hw = &adapter->hw;
2339 struct net_device *netdev = adapter->netdev;
2340 u32 tctl;
2341
2342 if (atomic_read(&adapter->tx_fifo_stall)) {
2343 if ((er32(TDT) == er32(TDH)) &&
2344 (er32(TDFT) == er32(TDFH)) &&
2345 (er32(TDFTS) == er32(TDFHS))) {
2346 tctl = er32(TCTL);
2347 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2348 ew32(TDFT, adapter->tx_head_addr);
2349 ew32(TDFH, adapter->tx_head_addr);
2350 ew32(TDFTS, adapter->tx_head_addr);
2351 ew32(TDFHS, adapter->tx_head_addr);
2352 ew32(TCTL, tctl);
2353 E1000_WRITE_FLUSH();
2354
2355 adapter->tx_fifo_head = 0;
2356 atomic_set(&adapter->tx_fifo_stall, 0);
2357 netif_wake_queue(netdev);
2358 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2359 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2360 }
2361 }
2362}
2363
2364bool e1000_has_link(struct e1000_adapter *adapter)
2365{
2366 struct e1000_hw *hw = &adapter->hw;
2367 bool link_active = false;
2368
2369 /* get_link_status is set on LSC (link status) interrupt or rx
2370 * sequence error interrupt (except on intel ce4100).
2371 * get_link_status will stay false until the
2372 * e1000_check_for_link establishes link for copper adapters
2373 * ONLY
2374 */
2375 switch (hw->media_type) {
2376 case e1000_media_type_copper:
2377 if (hw->mac_type == e1000_ce4100)
2378 hw->get_link_status = 1;
2379 if (hw->get_link_status) {
2380 e1000_check_for_link(hw);
2381 link_active = !hw->get_link_status;
2382 } else {
2383 link_active = true;
2384 }
2385 break;
2386 case e1000_media_type_fiber:
2387 e1000_check_for_link(hw);
2388 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2389 break;
2390 case e1000_media_type_internal_serdes:
2391 e1000_check_for_link(hw);
2392 link_active = hw->serdes_has_link;
2393 break;
2394 default:
2395 break;
2396 }
2397
2398 return link_active;
2399}
2400
2401/**
2402 * e1000_watchdog - work function
2403 * @work: work struct contained inside adapter struct
2404 **/
2405static void e1000_watchdog(struct work_struct *work)
2406{
2407 struct e1000_adapter *adapter = container_of(work,
2408 struct e1000_adapter,
2409 watchdog_task.work);
2410 struct e1000_hw *hw = &adapter->hw;
2411 struct net_device *netdev = adapter->netdev;
2412 struct e1000_tx_ring *txdr = adapter->tx_ring;
2413 u32 link, tctl;
2414
2415 link = e1000_has_link(adapter);
2416 if ((netif_carrier_ok(netdev)) && link)
2417 goto link_up;
2418
2419 if (link) {
2420 if (!netif_carrier_ok(netdev)) {
2421 u32 ctrl;
2422 bool txb2b = true;
2423 /* update snapshot of PHY registers on LSC */
2424 e1000_get_speed_and_duplex(hw,
2425 &adapter->link_speed,
2426 &adapter->link_duplex);
2427
2428 ctrl = er32(CTRL);
2429 pr_info("%s NIC Link is Up %d Mbps %s, "
2430 "Flow Control: %s\n",
2431 netdev->name,
2432 adapter->link_speed,
2433 adapter->link_duplex == FULL_DUPLEX ?
2434 "Full Duplex" : "Half Duplex",
2435 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2436 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2437 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2438 E1000_CTRL_TFCE) ? "TX" : "None")));
2439
2440 /* adjust timeout factor according to speed/duplex */
2441 adapter->tx_timeout_factor = 1;
2442 switch (adapter->link_speed) {
2443 case SPEED_10:
2444 txb2b = false;
2445 adapter->tx_timeout_factor = 16;
2446 break;
2447 case SPEED_100:
2448 txb2b = false;
2449 /* maybe add some timeout factor ? */
2450 break;
2451 }
2452
2453 /* enable transmits in the hardware */
2454 tctl = er32(TCTL);
2455 tctl |= E1000_TCTL_EN;
2456 ew32(TCTL, tctl);
2457
2458 netif_carrier_on(netdev);
2459 if (!test_bit(__E1000_DOWN, &adapter->flags))
2460 schedule_delayed_work(&adapter->phy_info_task,
2461 2 * HZ);
2462 adapter->smartspeed = 0;
2463 }
2464 } else {
2465 if (netif_carrier_ok(netdev)) {
2466 adapter->link_speed = 0;
2467 adapter->link_duplex = 0;
2468 pr_info("%s NIC Link is Down\n",
2469 netdev->name);
2470 netif_carrier_off(netdev);
2471
2472 if (!test_bit(__E1000_DOWN, &adapter->flags))
2473 schedule_delayed_work(&adapter->phy_info_task,
2474 2 * HZ);
2475 }
2476
2477 e1000_smartspeed(adapter);
2478 }
2479
2480link_up:
2481 e1000_update_stats(adapter);
2482
2483 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2484 adapter->tpt_old = adapter->stats.tpt;
2485 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2486 adapter->colc_old = adapter->stats.colc;
2487
2488 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2489 adapter->gorcl_old = adapter->stats.gorcl;
2490 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2491 adapter->gotcl_old = adapter->stats.gotcl;
2492
2493 e1000_update_adaptive(hw);
2494
2495 if (!netif_carrier_ok(netdev)) {
2496 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2497 /* We've lost link, so the controller stops DMA,
2498 * but we've got queued Tx work that's never going
2499 * to get done, so reset controller to flush Tx.
2500 * (Do the reset outside of interrupt context).
2501 */
2502 adapter->tx_timeout_count++;
2503 schedule_work(&adapter->reset_task);
2504 /* exit immediately since reset is imminent */
2505 return;
2506 }
2507 }
2508
2509 /* Simple mode for Interrupt Throttle Rate (ITR) */
2510 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2511 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2512 * Total asymmetrical Tx or Rx gets ITR=8000;
2513 * everyone else is between 2000-8000.
2514 */
2515 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2516 u32 dif = (adapter->gotcl > adapter->gorcl ?
2517 adapter->gotcl - adapter->gorcl :
2518 adapter->gorcl - adapter->gotcl) / 10000;
2519 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2520
2521 ew32(ITR, 1000000000 / (itr * 256));
2522 }
2523
2524 /* Cause software interrupt to ensure rx ring is cleaned */
2525 ew32(ICS, E1000_ICS_RXDMT0);
2526
2527 /* Force detection of hung controller every watchdog period */
2528 adapter->detect_tx_hung = true;
2529
2530 /* Reschedule the task */
2531 if (!test_bit(__E1000_DOWN, &adapter->flags))
2532 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2533}
2534
2535enum latency_range {
2536 lowest_latency = 0,
2537 low_latency = 1,
2538 bulk_latency = 2,
2539 latency_invalid = 255
2540};
2541
2542/**
2543 * e1000_update_itr - update the dynamic ITR value based on statistics
2544 * @adapter: pointer to adapter
2545 * @itr_setting: current adapter->itr
2546 * @packets: the number of packets during this measurement interval
2547 * @bytes: the number of bytes during this measurement interval
2548 *
2549 * Stores a new ITR value based on packets and byte
2550 * counts during the last interrupt. The advantage of per interrupt
2551 * computation is faster updates and more accurate ITR for the current
2552 * traffic pattern. Constants in this function were computed
2553 * based on theoretical maximum wire speed and thresholds were set based
2554 * on testing data as well as attempting to minimize response time
2555 * while increasing bulk throughput.
2556 * this functionality is controlled by the InterruptThrottleRate module
2557 * parameter (see e1000_param.c)
2558 **/
2559static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2560 u16 itr_setting, int packets, int bytes)
2561{
2562 unsigned int retval = itr_setting;
2563 struct e1000_hw *hw = &adapter->hw;
2564
2565 if (unlikely(hw->mac_type < e1000_82540))
2566 goto update_itr_done;
2567
2568 if (packets == 0)
2569 goto update_itr_done;
2570
2571 switch (itr_setting) {
2572 case lowest_latency:
2573 /* jumbo frames get bulk treatment*/
2574 if (bytes/packets > 8000)
2575 retval = bulk_latency;
2576 else if ((packets < 5) && (bytes > 512))
2577 retval = low_latency;
2578 break;
2579 case low_latency: /* 50 usec aka 20000 ints/s */
2580 if (bytes > 10000) {
2581 /* jumbo frames need bulk latency setting */
2582 if (bytes/packets > 8000)
2583 retval = bulk_latency;
2584 else if ((packets < 10) || ((bytes/packets) > 1200))
2585 retval = bulk_latency;
2586 else if ((packets > 35))
2587 retval = lowest_latency;
2588 } else if (bytes/packets > 2000)
2589 retval = bulk_latency;
2590 else if (packets <= 2 && bytes < 512)
2591 retval = lowest_latency;
2592 break;
2593 case bulk_latency: /* 250 usec aka 4000 ints/s */
2594 if (bytes > 25000) {
2595 if (packets > 35)
2596 retval = low_latency;
2597 } else if (bytes < 6000) {
2598 retval = low_latency;
2599 }
2600 break;
2601 }
2602
2603update_itr_done:
2604 return retval;
2605}
2606
2607static void e1000_set_itr(struct e1000_adapter *adapter)
2608{
2609 struct e1000_hw *hw = &adapter->hw;
2610 u16 current_itr;
2611 u32 new_itr = adapter->itr;
2612
2613 if (unlikely(hw->mac_type < e1000_82540))
2614 return;
2615
2616 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2617 if (unlikely(adapter->link_speed != SPEED_1000)) {
2618 current_itr = 0;
2619 new_itr = 4000;
2620 goto set_itr_now;
2621 }
2622
2623 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr,
2624 adapter->total_tx_packets,
2625 adapter->total_tx_bytes);
2626 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2627 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2628 adapter->tx_itr = low_latency;
2629
2630 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr,
2631 adapter->total_rx_packets,
2632 adapter->total_rx_bytes);
2633 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2634 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2635 adapter->rx_itr = low_latency;
2636
2637 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2638
2639 switch (current_itr) {
2640 /* counts and packets in update_itr are dependent on these numbers */
2641 case lowest_latency:
2642 new_itr = 70000;
2643 break;
2644 case low_latency:
2645 new_itr = 20000; /* aka hwitr = ~200 */
2646 break;
2647 case bulk_latency:
2648 new_itr = 4000;
2649 break;
2650 default:
2651 break;
2652 }
2653
2654set_itr_now:
2655 if (new_itr != adapter->itr) {
2656 /* this attempts to bias the interrupt rate towards Bulk
2657 * by adding intermediate steps when interrupt rate is
2658 * increasing
2659 */
2660 new_itr = new_itr > adapter->itr ?
2661 min(adapter->itr + (new_itr >> 2), new_itr) :
2662 new_itr;
2663 adapter->itr = new_itr;
2664 ew32(ITR, 1000000000 / (new_itr * 256));
2665 }
2666}
2667
2668#define E1000_TX_FLAGS_CSUM 0x00000001
2669#define E1000_TX_FLAGS_VLAN 0x00000002
2670#define E1000_TX_FLAGS_TSO 0x00000004
2671#define E1000_TX_FLAGS_IPV4 0x00000008
2672#define E1000_TX_FLAGS_NO_FCS 0x00000010
2673#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2674#define E1000_TX_FLAGS_VLAN_SHIFT 16
2675
2676static int e1000_tso(struct e1000_adapter *adapter,
2677 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2678{
2679 struct e1000_context_desc *context_desc;
2680 struct e1000_buffer *buffer_info;
2681 unsigned int i;
2682 u32 cmd_length = 0;
2683 u16 ipcse = 0, tucse, mss;
2684 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2685
2686 if (skb_is_gso(skb)) {
2687 int err;
2688
2689 err = skb_cow_head(skb, 0);
2690 if (err < 0)
2691 return err;
2692
2693 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2694 mss = skb_shinfo(skb)->gso_size;
2695 if (skb->protocol == htons(ETH_P_IP)) {
2696 struct iphdr *iph = ip_hdr(skb);
2697 iph->tot_len = 0;
2698 iph->check = 0;
2699 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2700 iph->daddr, 0,
2701 IPPROTO_TCP,
2702 0);
2703 cmd_length = E1000_TXD_CMD_IP;
2704 ipcse = skb_transport_offset(skb) - 1;
2705 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2706 ipv6_hdr(skb)->payload_len = 0;
2707 tcp_hdr(skb)->check =
2708 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2709 &ipv6_hdr(skb)->daddr,
2710 0, IPPROTO_TCP, 0);
2711 ipcse = 0;
2712 }
2713 ipcss = skb_network_offset(skb);
2714 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2715 tucss = skb_transport_offset(skb);
2716 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2717 tucse = 0;
2718
2719 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2720 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2721
2722 i = tx_ring->next_to_use;
2723 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2724 buffer_info = &tx_ring->buffer_info[i];
2725
2726 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2727 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2728 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2729 context_desc->upper_setup.tcp_fields.tucss = tucss;
2730 context_desc->upper_setup.tcp_fields.tucso = tucso;
2731 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2732 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2733 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2734 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2735
2736 buffer_info->time_stamp = jiffies;
2737 buffer_info->next_to_watch = i;
2738
2739 if (++i == tx_ring->count) i = 0;
2740 tx_ring->next_to_use = i;
2741
2742 return true;
2743 }
2744 return false;
2745}
2746
2747static bool e1000_tx_csum(struct e1000_adapter *adapter,
2748 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2749{
2750 struct e1000_context_desc *context_desc;
2751 struct e1000_buffer *buffer_info;
2752 unsigned int i;
2753 u8 css;
2754 u32 cmd_len = E1000_TXD_CMD_DEXT;
2755
2756 if (skb->ip_summed != CHECKSUM_PARTIAL)
2757 return false;
2758
2759 switch (skb->protocol) {
2760 case cpu_to_be16(ETH_P_IP):
2761 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2762 cmd_len |= E1000_TXD_CMD_TCP;
2763 break;
2764 case cpu_to_be16(ETH_P_IPV6):
2765 /* XXX not handling all IPV6 headers */
2766 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2767 cmd_len |= E1000_TXD_CMD_TCP;
2768 break;
2769 default:
2770 if (unlikely(net_ratelimit()))
2771 e_warn(drv, "checksum_partial proto=%x!\n",
2772 skb->protocol);
2773 break;
2774 }
2775
2776 css = skb_checksum_start_offset(skb);
2777
2778 i = tx_ring->next_to_use;
2779 buffer_info = &tx_ring->buffer_info[i];
2780 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2781
2782 context_desc->lower_setup.ip_config = 0;
2783 context_desc->upper_setup.tcp_fields.tucss = css;
2784 context_desc->upper_setup.tcp_fields.tucso =
2785 css + skb->csum_offset;
2786 context_desc->upper_setup.tcp_fields.tucse = 0;
2787 context_desc->tcp_seg_setup.data = 0;
2788 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2789
2790 buffer_info->time_stamp = jiffies;
2791 buffer_info->next_to_watch = i;
2792
2793 if (unlikely(++i == tx_ring->count)) i = 0;
2794 tx_ring->next_to_use = i;
2795
2796 return true;
2797}
2798
2799#define E1000_MAX_TXD_PWR 12
2800#define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2801
2802static int e1000_tx_map(struct e1000_adapter *adapter,
2803 struct e1000_tx_ring *tx_ring,
2804 struct sk_buff *skb, unsigned int first,
2805 unsigned int max_per_txd, unsigned int nr_frags,
2806 unsigned int mss)
2807{
2808 struct e1000_hw *hw = &adapter->hw;
2809 struct pci_dev *pdev = adapter->pdev;
2810 struct e1000_buffer *buffer_info;
2811 unsigned int len = skb_headlen(skb);
2812 unsigned int offset = 0, size, count = 0, i;
2813 unsigned int f, bytecount, segs;
2814
2815 i = tx_ring->next_to_use;
2816
2817 while (len) {
2818 buffer_info = &tx_ring->buffer_info[i];
2819 size = min(len, max_per_txd);
2820 /* Workaround for Controller erratum --
2821 * descriptor for non-tso packet in a linear SKB that follows a
2822 * tso gets written back prematurely before the data is fully
2823 * DMA'd to the controller
2824 */
2825 if (!skb->data_len && tx_ring->last_tx_tso &&
2826 !skb_is_gso(skb)) {
2827 tx_ring->last_tx_tso = false;
2828 size -= 4;
2829 }
2830
2831 /* Workaround for premature desc write-backs
2832 * in TSO mode. Append 4-byte sentinel desc
2833 */
2834 if (unlikely(mss && !nr_frags && size == len && size > 8))
2835 size -= 4;
2836 /* work-around for errata 10 and it applies
2837 * to all controllers in PCI-X mode
2838 * The fix is to make sure that the first descriptor of a
2839 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2840 */
2841 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2842 (size > 2015) && count == 0))
2843 size = 2015;
2844
2845 /* Workaround for potential 82544 hang in PCI-X. Avoid
2846 * terminating buffers within evenly-aligned dwords.
2847 */
2848 if (unlikely(adapter->pcix_82544 &&
2849 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2850 size > 4))
2851 size -= 4;
2852
2853 buffer_info->length = size;
2854 /* set time_stamp *before* dma to help avoid a possible race */
2855 buffer_info->time_stamp = jiffies;
2856 buffer_info->mapped_as_page = false;
2857 buffer_info->dma = dma_map_single(&pdev->dev,
2858 skb->data + offset,
2859 size, DMA_TO_DEVICE);
2860 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2861 goto dma_error;
2862 buffer_info->next_to_watch = i;
2863
2864 len -= size;
2865 offset += size;
2866 count++;
2867 if (len) {
2868 i++;
2869 if (unlikely(i == tx_ring->count))
2870 i = 0;
2871 }
2872 }
2873
2874 for (f = 0; f < nr_frags; f++) {
2875 const struct skb_frag_struct *frag;
2876
2877 frag = &skb_shinfo(skb)->frags[f];
2878 len = skb_frag_size(frag);
2879 offset = 0;
2880
2881 while (len) {
2882 unsigned long bufend;
2883 i++;
2884 if (unlikely(i == tx_ring->count))
2885 i = 0;
2886
2887 buffer_info = &tx_ring->buffer_info[i];
2888 size = min(len, max_per_txd);
2889 /* Workaround for premature desc write-backs
2890 * in TSO mode. Append 4-byte sentinel desc
2891 */
2892 if (unlikely(mss && f == (nr_frags-1) &&
2893 size == len && size > 8))
2894 size -= 4;
2895 /* Workaround for potential 82544 hang in PCI-X.
2896 * Avoid terminating buffers within evenly-aligned
2897 * dwords.
2898 */
2899 bufend = (unsigned long)
2900 page_to_phys(skb_frag_page(frag));
2901 bufend += offset + size - 1;
2902 if (unlikely(adapter->pcix_82544 &&
2903 !(bufend & 4) &&
2904 size > 4))
2905 size -= 4;
2906
2907 buffer_info->length = size;
2908 buffer_info->time_stamp = jiffies;
2909 buffer_info->mapped_as_page = true;
2910 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2911 offset, size, DMA_TO_DEVICE);
2912 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2913 goto dma_error;
2914 buffer_info->next_to_watch = i;
2915
2916 len -= size;
2917 offset += size;
2918 count++;
2919 }
2920 }
2921
2922 segs = skb_shinfo(skb)->gso_segs ?: 1;
2923 /* multiply data chunks by size of headers */
2924 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2925
2926 tx_ring->buffer_info[i].skb = skb;
2927 tx_ring->buffer_info[i].segs = segs;
2928 tx_ring->buffer_info[i].bytecount = bytecount;
2929 tx_ring->buffer_info[first].next_to_watch = i;
2930
2931 return count;
2932
2933dma_error:
2934 dev_err(&pdev->dev, "TX DMA map failed\n");
2935 buffer_info->dma = 0;
2936 if (count)
2937 count--;
2938
2939 while (count--) {
2940 if (i==0)
2941 i += tx_ring->count;
2942 i--;
2943 buffer_info = &tx_ring->buffer_info[i];
2944 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2945 }
2946
2947 return 0;
2948}
2949
2950static void e1000_tx_queue(struct e1000_adapter *adapter,
2951 struct e1000_tx_ring *tx_ring, int tx_flags,
2952 int count)
2953{
2954 struct e1000_hw *hw = &adapter->hw;
2955 struct e1000_tx_desc *tx_desc = NULL;
2956 struct e1000_buffer *buffer_info;
2957 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2958 unsigned int i;
2959
2960 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2961 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2962 E1000_TXD_CMD_TSE;
2963 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2964
2965 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2966 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2967 }
2968
2969 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2970 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2971 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2972 }
2973
2974 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2975 txd_lower |= E1000_TXD_CMD_VLE;
2976 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2977 }
2978
2979 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
2980 txd_lower &= ~(E1000_TXD_CMD_IFCS);
2981
2982 i = tx_ring->next_to_use;
2983
2984 while (count--) {
2985 buffer_info = &tx_ring->buffer_info[i];
2986 tx_desc = E1000_TX_DESC(*tx_ring, i);
2987 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2988 tx_desc->lower.data =
2989 cpu_to_le32(txd_lower | buffer_info->length);
2990 tx_desc->upper.data = cpu_to_le32(txd_upper);
2991 if (unlikely(++i == tx_ring->count)) i = 0;
2992 }
2993
2994 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2995
2996 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
2997 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
2998 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
2999
3000 /* Force memory writes to complete before letting h/w
3001 * know there are new descriptors to fetch. (Only
3002 * applicable for weak-ordered memory model archs,
3003 * such as IA-64).
3004 */
3005 wmb();
3006
3007 tx_ring->next_to_use = i;
3008 writel(i, hw->hw_addr + tx_ring->tdt);
3009 /* we need this if more than one processor can write to our tail
3010 * at a time, it synchronizes IO on IA64/Altix systems
3011 */
3012 mmiowb();
3013}
3014
3015/* 82547 workaround to avoid controller hang in half-duplex environment.
3016 * The workaround is to avoid queuing a large packet that would span
3017 * the internal Tx FIFO ring boundary by notifying the stack to resend
3018 * the packet at a later time. This gives the Tx FIFO an opportunity to
3019 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3020 * to the beginning of the Tx FIFO.
3021 */
3022
3023#define E1000_FIFO_HDR 0x10
3024#define E1000_82547_PAD_LEN 0x3E0
3025
3026static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3027 struct sk_buff *skb)
3028{
3029 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3030 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3031
3032 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3033
3034 if (adapter->link_duplex != HALF_DUPLEX)
3035 goto no_fifo_stall_required;
3036
3037 if (atomic_read(&adapter->tx_fifo_stall))
3038 return 1;
3039
3040 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3041 atomic_set(&adapter->tx_fifo_stall, 1);
3042 return 1;
3043 }
3044
3045no_fifo_stall_required:
3046 adapter->tx_fifo_head += skb_fifo_len;
3047 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3048 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3049 return 0;
3050}
3051
3052static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3053{
3054 struct e1000_adapter *adapter = netdev_priv(netdev);
3055 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3056
3057 netif_stop_queue(netdev);
3058 /* Herbert's original patch had:
3059 * smp_mb__after_netif_stop_queue();
3060 * but since that doesn't exist yet, just open code it.
3061 */
3062 smp_mb();
3063
3064 /* We need to check again in a case another CPU has just
3065 * made room available.
3066 */
3067 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3068 return -EBUSY;
3069
3070 /* A reprieve! */
3071 netif_start_queue(netdev);
3072 ++adapter->restart_queue;
3073 return 0;
3074}
3075
3076static int e1000_maybe_stop_tx(struct net_device *netdev,
3077 struct e1000_tx_ring *tx_ring, int size)
3078{
3079 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3080 return 0;
3081 return __e1000_maybe_stop_tx(netdev, size);
3082}
3083
3084#define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3085static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3086 struct net_device *netdev)
3087{
3088 struct e1000_adapter *adapter = netdev_priv(netdev);
3089 struct e1000_hw *hw = &adapter->hw;
3090 struct e1000_tx_ring *tx_ring;
3091 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3092 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3093 unsigned int tx_flags = 0;
3094 unsigned int len = skb_headlen(skb);
3095 unsigned int nr_frags;
3096 unsigned int mss;
3097 int count = 0;
3098 int tso;
3099 unsigned int f;
3100
3101 /* This goes back to the question of how to logically map a Tx queue
3102 * to a flow. Right now, performance is impacted slightly negatively
3103 * if using multiple Tx queues. If the stack breaks away from a
3104 * single qdisc implementation, we can look at this again.
3105 */
3106 tx_ring = adapter->tx_ring;
3107
3108 if (unlikely(skb->len <= 0)) {
3109 dev_kfree_skb_any(skb);
3110 return NETDEV_TX_OK;
3111 }
3112
3113 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3114 * packets may get corrupted during padding by HW.
3115 * To WA this issue, pad all small packets manually.
3116 */
3117 if (skb->len < ETH_ZLEN) {
3118 if (skb_pad(skb, ETH_ZLEN - skb->len))
3119 return NETDEV_TX_OK;
3120 skb->len = ETH_ZLEN;
3121 skb_set_tail_pointer(skb, ETH_ZLEN);
3122 }
3123
3124 mss = skb_shinfo(skb)->gso_size;
3125 /* The controller does a simple calculation to
3126 * make sure there is enough room in the FIFO before
3127 * initiating the DMA for each buffer. The calc is:
3128 * 4 = ceil(buffer len/mss). To make sure we don't
3129 * overrun the FIFO, adjust the max buffer len if mss
3130 * drops.
3131 */
3132 if (mss) {
3133 u8 hdr_len;
3134 max_per_txd = min(mss << 2, max_per_txd);
3135 max_txd_pwr = fls(max_per_txd) - 1;
3136
3137 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3138 if (skb->data_len && hdr_len == len) {
3139 switch (hw->mac_type) {
3140 unsigned int pull_size;
3141 case e1000_82544:
3142 /* Make sure we have room to chop off 4 bytes,
3143 * and that the end alignment will work out to
3144 * this hardware's requirements
3145 * NOTE: this is a TSO only workaround
3146 * if end byte alignment not correct move us
3147 * into the next dword
3148 */
3149 if ((unsigned long)(skb_tail_pointer(skb) - 1)
3150 & 4)
3151 break;
3152 /* fall through */
3153 pull_size = min((unsigned int)4, skb->data_len);
3154 if (!__pskb_pull_tail(skb, pull_size)) {
3155 e_err(drv, "__pskb_pull_tail "
3156 "failed.\n");
3157 dev_kfree_skb_any(skb);
3158 return NETDEV_TX_OK;
3159 }
3160 len = skb_headlen(skb);
3161 break;
3162 default:
3163 /* do nothing */
3164 break;
3165 }
3166 }
3167 }
3168
3169 /* reserve a descriptor for the offload context */
3170 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3171 count++;
3172 count++;
3173
3174 /* Controller Erratum workaround */
3175 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3176 count++;
3177
3178 count += TXD_USE_COUNT(len, max_txd_pwr);
3179
3180 if (adapter->pcix_82544)
3181 count++;
3182
3183 /* work-around for errata 10 and it applies to all controllers
3184 * in PCI-X mode, so add one more descriptor to the count
3185 */
3186 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3187 (len > 2015)))
3188 count++;
3189
3190 nr_frags = skb_shinfo(skb)->nr_frags;
3191 for (f = 0; f < nr_frags; f++)
3192 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3193 max_txd_pwr);
3194 if (adapter->pcix_82544)
3195 count += nr_frags;
3196
3197 /* need: count + 2 desc gap to keep tail from touching
3198 * head, otherwise try next time
3199 */
3200 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3201 return NETDEV_TX_BUSY;
3202
3203 if (unlikely((hw->mac_type == e1000_82547) &&
3204 (e1000_82547_fifo_workaround(adapter, skb)))) {
3205 netif_stop_queue(netdev);
3206 if (!test_bit(__E1000_DOWN, &adapter->flags))
3207 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3208 return NETDEV_TX_BUSY;
3209 }
3210
3211 if (vlan_tx_tag_present(skb)) {
3212 tx_flags |= E1000_TX_FLAGS_VLAN;
3213 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3214 }
3215
3216 first = tx_ring->next_to_use;
3217
3218 tso = e1000_tso(adapter, tx_ring, skb);
3219 if (tso < 0) {
3220 dev_kfree_skb_any(skb);
3221 return NETDEV_TX_OK;
3222 }
3223
3224 if (likely(tso)) {
3225 if (likely(hw->mac_type != e1000_82544))
3226 tx_ring->last_tx_tso = true;
3227 tx_flags |= E1000_TX_FLAGS_TSO;
3228 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3229 tx_flags |= E1000_TX_FLAGS_CSUM;
3230
3231 if (likely(skb->protocol == htons(ETH_P_IP)))
3232 tx_flags |= E1000_TX_FLAGS_IPV4;
3233
3234 if (unlikely(skb->no_fcs))
3235 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3236
3237 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3238 nr_frags, mss);
3239
3240 if (count) {
3241 netdev_sent_queue(netdev, skb->len);
3242 skb_tx_timestamp(skb);
3243
3244 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3245 /* Make sure there is space in the ring for the next send. */
3246 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3247
3248 } else {
3249 dev_kfree_skb_any(skb);
3250 tx_ring->buffer_info[first].time_stamp = 0;
3251 tx_ring->next_to_use = first;
3252 }
3253
3254 return NETDEV_TX_OK;
3255}
3256
3257#define NUM_REGS 38 /* 1 based count */
3258static void e1000_regdump(struct e1000_adapter *adapter)
3259{
3260 struct e1000_hw *hw = &adapter->hw;
3261 u32 regs[NUM_REGS];
3262 u32 *regs_buff = regs;
3263 int i = 0;
3264
3265 static const char * const reg_name[] = {
3266 "CTRL", "STATUS",
3267 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3268 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3269 "TIDV", "TXDCTL", "TADV", "TARC0",
3270 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3271 "TXDCTL1", "TARC1",
3272 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3273 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3274 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3275 };
3276
3277 regs_buff[0] = er32(CTRL);
3278 regs_buff[1] = er32(STATUS);
3279
3280 regs_buff[2] = er32(RCTL);
3281 regs_buff[3] = er32(RDLEN);
3282 regs_buff[4] = er32(RDH);
3283 regs_buff[5] = er32(RDT);
3284 regs_buff[6] = er32(RDTR);
3285
3286 regs_buff[7] = er32(TCTL);
3287 regs_buff[8] = er32(TDBAL);
3288 regs_buff[9] = er32(TDBAH);
3289 regs_buff[10] = er32(TDLEN);
3290 regs_buff[11] = er32(TDH);
3291 regs_buff[12] = er32(TDT);
3292 regs_buff[13] = er32(TIDV);
3293 regs_buff[14] = er32(TXDCTL);
3294 regs_buff[15] = er32(TADV);
3295 regs_buff[16] = er32(TARC0);
3296
3297 regs_buff[17] = er32(TDBAL1);
3298 regs_buff[18] = er32(TDBAH1);
3299 regs_buff[19] = er32(TDLEN1);
3300 regs_buff[20] = er32(TDH1);
3301 regs_buff[21] = er32(TDT1);
3302 regs_buff[22] = er32(TXDCTL1);
3303 regs_buff[23] = er32(TARC1);
3304 regs_buff[24] = er32(CTRL_EXT);
3305 regs_buff[25] = er32(ERT);
3306 regs_buff[26] = er32(RDBAL0);
3307 regs_buff[27] = er32(RDBAH0);
3308 regs_buff[28] = er32(TDFH);
3309 regs_buff[29] = er32(TDFT);
3310 regs_buff[30] = er32(TDFHS);
3311 regs_buff[31] = er32(TDFTS);
3312 regs_buff[32] = er32(TDFPC);
3313 regs_buff[33] = er32(RDFH);
3314 regs_buff[34] = er32(RDFT);
3315 regs_buff[35] = er32(RDFHS);
3316 regs_buff[36] = er32(RDFTS);
3317 regs_buff[37] = er32(RDFPC);
3318
3319 pr_info("Register dump\n");
3320 for (i = 0; i < NUM_REGS; i++)
3321 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3322}
3323
3324/*
3325 * e1000_dump: Print registers, tx ring and rx ring
3326 */
3327static void e1000_dump(struct e1000_adapter *adapter)
3328{
3329 /* this code doesn't handle multiple rings */
3330 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3331 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3332 int i;
3333
3334 if (!netif_msg_hw(adapter))
3335 return;
3336
3337 /* Print Registers */
3338 e1000_regdump(adapter);
3339
3340 /* transmit dump */
3341 pr_info("TX Desc ring0 dump\n");
3342
3343 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3344 *
3345 * Legacy Transmit Descriptor
3346 * +--------------------------------------------------------------+
3347 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3348 * +--------------------------------------------------------------+
3349 * 8 | Special | CSS | Status | CMD | CSO | Length |
3350 * +--------------------------------------------------------------+
3351 * 63 48 47 36 35 32 31 24 23 16 15 0
3352 *
3353 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3354 * 63 48 47 40 39 32 31 16 15 8 7 0
3355 * +----------------------------------------------------------------+
3356 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3357 * +----------------------------------------------------------------+
3358 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3359 * +----------------------------------------------------------------+
3360 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3361 *
3362 * Extended Data Descriptor (DTYP=0x1)
3363 * +----------------------------------------------------------------+
3364 * 0 | Buffer Address [63:0] |
3365 * +----------------------------------------------------------------+
3366 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3367 * +----------------------------------------------------------------+
3368 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3369 */
3370 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3371 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3372
3373 if (!netif_msg_tx_done(adapter))
3374 goto rx_ring_summary;
3375
3376 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3377 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3378 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
3379 struct my_u { __le64 a; __le64 b; };
3380 struct my_u *u = (struct my_u *)tx_desc;
3381 const char *type;
3382
3383 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3384 type = "NTC/U";
3385 else if (i == tx_ring->next_to_use)
3386 type = "NTU";
3387 else if (i == tx_ring->next_to_clean)
3388 type = "NTC";
3389 else
3390 type = "";
3391
3392 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3393 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3394 le64_to_cpu(u->a), le64_to_cpu(u->b),
3395 (u64)buffer_info->dma, buffer_info->length,
3396 buffer_info->next_to_watch,
3397 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3398 }
3399
3400rx_ring_summary:
3401 /* receive dump */
3402 pr_info("\nRX Desc ring dump\n");
3403
3404 /* Legacy Receive Descriptor Format
3405 *
3406 * +-----------------------------------------------------+
3407 * | Buffer Address [63:0] |
3408 * +-----------------------------------------------------+
3409 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3410 * +-----------------------------------------------------+
3411 * 63 48 47 40 39 32 31 16 15 0
3412 */
3413 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3414
3415 if (!netif_msg_rx_status(adapter))
3416 goto exit;
3417
3418 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3419 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3420 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i];
3421 struct my_u { __le64 a; __le64 b; };
3422 struct my_u *u = (struct my_u *)rx_desc;
3423 const char *type;
3424
3425 if (i == rx_ring->next_to_use)
3426 type = "NTU";
3427 else if (i == rx_ring->next_to_clean)
3428 type = "NTC";
3429 else
3430 type = "";
3431
3432 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3433 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3434 (u64)buffer_info->dma, buffer_info->skb, type);
3435 } /* for */
3436
3437 /* dump the descriptor caches */
3438 /* rx */
3439 pr_info("Rx descriptor cache in 64bit format\n");
3440 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3441 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3442 i,
3443 readl(adapter->hw.hw_addr + i+4),
3444 readl(adapter->hw.hw_addr + i),
3445 readl(adapter->hw.hw_addr + i+12),
3446 readl(adapter->hw.hw_addr + i+8));
3447 }
3448 /* tx */
3449 pr_info("Tx descriptor cache in 64bit format\n");
3450 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3451 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3452 i,
3453 readl(adapter->hw.hw_addr + i+4),
3454 readl(adapter->hw.hw_addr + i),
3455 readl(adapter->hw.hw_addr + i+12),
3456 readl(adapter->hw.hw_addr + i+8));
3457 }
3458exit:
3459 return;
3460}
3461
3462/**
3463 * e1000_tx_timeout - Respond to a Tx Hang
3464 * @netdev: network interface device structure
3465 **/
3466static void e1000_tx_timeout(struct net_device *netdev)
3467{
3468 struct e1000_adapter *adapter = netdev_priv(netdev);
3469
3470 /* Do the reset outside of interrupt context */
3471 adapter->tx_timeout_count++;
3472 schedule_work(&adapter->reset_task);
3473}
3474
3475static void e1000_reset_task(struct work_struct *work)
3476{
3477 struct e1000_adapter *adapter =
3478 container_of(work, struct e1000_adapter, reset_task);
3479
3480 e_err(drv, "Reset adapter\n");
3481 e1000_reinit_locked(adapter);
3482}
3483
3484/**
3485 * e1000_get_stats - Get System Network Statistics
3486 * @netdev: network interface device structure
3487 *
3488 * Returns the address of the device statistics structure.
3489 * The statistics are actually updated from the watchdog.
3490 **/
3491static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3492{
3493 /* only return the current stats */
3494 return &netdev->stats;
3495}
3496
3497/**
3498 * e1000_change_mtu - Change the Maximum Transfer Unit
3499 * @netdev: network interface device structure
3500 * @new_mtu: new value for maximum frame size
3501 *
3502 * Returns 0 on success, negative on failure
3503 **/
3504static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3505{
3506 struct e1000_adapter *adapter = netdev_priv(netdev);
3507 struct e1000_hw *hw = &adapter->hw;
3508 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3509
3510 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3511 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3512 e_err(probe, "Invalid MTU setting\n");
3513 return -EINVAL;
3514 }
3515
3516 /* Adapter-specific max frame size limits. */
3517 switch (hw->mac_type) {
3518 case e1000_undefined ... e1000_82542_rev2_1:
3519 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3520 e_err(probe, "Jumbo Frames not supported.\n");
3521 return -EINVAL;
3522 }
3523 break;
3524 default:
3525 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3526 break;
3527 }
3528
3529 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3530 msleep(1);
3531 /* e1000_down has a dependency on max_frame_size */
3532 hw->max_frame_size = max_frame;
3533 if (netif_running(netdev))
3534 e1000_down(adapter);
3535
3536 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3537 * means we reserve 2 more, this pushes us to allocate from the next
3538 * larger slab size.
3539 * i.e. RXBUFFER_2048 --> size-4096 slab
3540 * however with the new *_jumbo_rx* routines, jumbo receives will use
3541 * fragmented skbs
3542 */
3543
3544 if (max_frame <= E1000_RXBUFFER_2048)
3545 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3546 else
3547#if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3548 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3549#elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3550 adapter->rx_buffer_len = PAGE_SIZE;
3551#endif
3552
3553 /* adjust allocation if LPE protects us, and we aren't using SBP */
3554 if (!hw->tbi_compatibility_on &&
3555 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3556 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3557 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3558
3559 pr_info("%s changing MTU from %d to %d\n",
3560 netdev->name, netdev->mtu, new_mtu);
3561 netdev->mtu = new_mtu;
3562
3563 if (netif_running(netdev))
3564 e1000_up(adapter);
3565 else
3566 e1000_reset(adapter);
3567
3568 clear_bit(__E1000_RESETTING, &adapter->flags);
3569
3570 return 0;
3571}
3572
3573/**
3574 * e1000_update_stats - Update the board statistics counters
3575 * @adapter: board private structure
3576 **/
3577void e1000_update_stats(struct e1000_adapter *adapter)
3578{
3579 struct net_device *netdev = adapter->netdev;
3580 struct e1000_hw *hw = &adapter->hw;
3581 struct pci_dev *pdev = adapter->pdev;
3582 unsigned long flags;
3583 u16 phy_tmp;
3584
3585#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3586
3587 /* Prevent stats update while adapter is being reset, or if the pci
3588 * connection is down.
3589 */
3590 if (adapter->link_speed == 0)
3591 return;
3592 if (pci_channel_offline(pdev))
3593 return;
3594
3595 spin_lock_irqsave(&adapter->stats_lock, flags);
3596
3597 /* these counters are modified from e1000_tbi_adjust_stats,
3598 * called from the interrupt context, so they must only
3599 * be written while holding adapter->stats_lock
3600 */
3601
3602 adapter->stats.crcerrs += er32(CRCERRS);
3603 adapter->stats.gprc += er32(GPRC);
3604 adapter->stats.gorcl += er32(GORCL);
3605 adapter->stats.gorch += er32(GORCH);
3606 adapter->stats.bprc += er32(BPRC);
3607 adapter->stats.mprc += er32(MPRC);
3608 adapter->stats.roc += er32(ROC);
3609
3610 adapter->stats.prc64 += er32(PRC64);
3611 adapter->stats.prc127 += er32(PRC127);
3612 adapter->stats.prc255 += er32(PRC255);
3613 adapter->stats.prc511 += er32(PRC511);
3614 adapter->stats.prc1023 += er32(PRC1023);
3615 adapter->stats.prc1522 += er32(PRC1522);
3616
3617 adapter->stats.symerrs += er32(SYMERRS);
3618 adapter->stats.mpc += er32(MPC);
3619 adapter->stats.scc += er32(SCC);
3620 adapter->stats.ecol += er32(ECOL);
3621 adapter->stats.mcc += er32(MCC);
3622 adapter->stats.latecol += er32(LATECOL);
3623 adapter->stats.dc += er32(DC);
3624 adapter->stats.sec += er32(SEC);
3625 adapter->stats.rlec += er32(RLEC);
3626 adapter->stats.xonrxc += er32(XONRXC);
3627 adapter->stats.xontxc += er32(XONTXC);
3628 adapter->stats.xoffrxc += er32(XOFFRXC);
3629 adapter->stats.xofftxc += er32(XOFFTXC);
3630 adapter->stats.fcruc += er32(FCRUC);
3631 adapter->stats.gptc += er32(GPTC);
3632 adapter->stats.gotcl += er32(GOTCL);
3633 adapter->stats.gotch += er32(GOTCH);
3634 adapter->stats.rnbc += er32(RNBC);
3635 adapter->stats.ruc += er32(RUC);
3636 adapter->stats.rfc += er32(RFC);
3637 adapter->stats.rjc += er32(RJC);
3638 adapter->stats.torl += er32(TORL);
3639 adapter->stats.torh += er32(TORH);
3640 adapter->stats.totl += er32(TOTL);
3641 adapter->stats.toth += er32(TOTH);
3642 adapter->stats.tpr += er32(TPR);
3643
3644 adapter->stats.ptc64 += er32(PTC64);
3645 adapter->stats.ptc127 += er32(PTC127);
3646 adapter->stats.ptc255 += er32(PTC255);
3647 adapter->stats.ptc511 += er32(PTC511);
3648 adapter->stats.ptc1023 += er32(PTC1023);
3649 adapter->stats.ptc1522 += er32(PTC1522);
3650
3651 adapter->stats.mptc += er32(MPTC);
3652 adapter->stats.bptc += er32(BPTC);
3653
3654 /* used for adaptive IFS */
3655
3656 hw->tx_packet_delta = er32(TPT);
3657 adapter->stats.tpt += hw->tx_packet_delta;
3658 hw->collision_delta = er32(COLC);
3659 adapter->stats.colc += hw->collision_delta;
3660
3661 if (hw->mac_type >= e1000_82543) {
3662 adapter->stats.algnerrc += er32(ALGNERRC);
3663 adapter->stats.rxerrc += er32(RXERRC);
3664 adapter->stats.tncrs += er32(TNCRS);
3665 adapter->stats.cexterr += er32(CEXTERR);
3666 adapter->stats.tsctc += er32(TSCTC);
3667 adapter->stats.tsctfc += er32(TSCTFC);
3668 }
3669
3670 /* Fill out the OS statistics structure */
3671 netdev->stats.multicast = adapter->stats.mprc;
3672 netdev->stats.collisions = adapter->stats.colc;
3673
3674 /* Rx Errors */
3675
3676 /* RLEC on some newer hardware can be incorrect so build
3677 * our own version based on RUC and ROC
3678 */
3679 netdev->stats.rx_errors = adapter->stats.rxerrc +
3680 adapter->stats.crcerrs + adapter->stats.algnerrc +
3681 adapter->stats.ruc + adapter->stats.roc +
3682 adapter->stats.cexterr;
3683 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3684 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3685 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3686 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3687 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3688
3689 /* Tx Errors */
3690 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3691 netdev->stats.tx_errors = adapter->stats.txerrc;
3692 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3693 netdev->stats.tx_window_errors = adapter->stats.latecol;
3694 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3695 if (hw->bad_tx_carr_stats_fd &&
3696 adapter->link_duplex == FULL_DUPLEX) {
3697 netdev->stats.tx_carrier_errors = 0;
3698 adapter->stats.tncrs = 0;
3699 }
3700
3701 /* Tx Dropped needs to be maintained elsewhere */
3702
3703 /* Phy Stats */
3704 if (hw->media_type == e1000_media_type_copper) {
3705 if ((adapter->link_speed == SPEED_1000) &&
3706 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3707 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3708 adapter->phy_stats.idle_errors += phy_tmp;
3709 }
3710
3711 if ((hw->mac_type <= e1000_82546) &&
3712 (hw->phy_type == e1000_phy_m88) &&
3713 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3714 adapter->phy_stats.receive_errors += phy_tmp;
3715 }
3716
3717 /* Management Stats */
3718 if (hw->has_smbus) {
3719 adapter->stats.mgptc += er32(MGTPTC);
3720 adapter->stats.mgprc += er32(MGTPRC);
3721 adapter->stats.mgpdc += er32(MGTPDC);
3722 }
3723
3724 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3725}
3726
3727/**
3728 * e1000_intr - Interrupt Handler
3729 * @irq: interrupt number
3730 * @data: pointer to a network interface device structure
3731 **/
3732static irqreturn_t e1000_intr(int irq, void *data)
3733{
3734 struct net_device *netdev = data;
3735 struct e1000_adapter *adapter = netdev_priv(netdev);
3736 struct e1000_hw *hw = &adapter->hw;
3737 u32 icr = er32(ICR);
3738
3739 if (unlikely((!icr)))
3740 return IRQ_NONE; /* Not our interrupt */
3741
3742 /* we might have caused the interrupt, but the above
3743 * read cleared it, and just in case the driver is
3744 * down there is nothing to do so return handled
3745 */
3746 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3747 return IRQ_HANDLED;
3748
3749 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3750 hw->get_link_status = 1;
3751 /* guard against interrupt when we're going down */
3752 if (!test_bit(__E1000_DOWN, &adapter->flags))
3753 schedule_delayed_work(&adapter->watchdog_task, 1);
3754 }
3755
3756 /* disable interrupts, without the synchronize_irq bit */
3757 ew32(IMC, ~0);
3758 E1000_WRITE_FLUSH();
3759
3760 if (likely(napi_schedule_prep(&adapter->napi))) {
3761 adapter->total_tx_bytes = 0;
3762 adapter->total_tx_packets = 0;
3763 adapter->total_rx_bytes = 0;
3764 adapter->total_rx_packets = 0;
3765 __napi_schedule(&adapter->napi);
3766 } else {
3767 /* this really should not happen! if it does it is basically a
3768 * bug, but not a hard error, so enable ints and continue
3769 */
3770 if (!test_bit(__E1000_DOWN, &adapter->flags))
3771 e1000_irq_enable(adapter);
3772 }
3773
3774 return IRQ_HANDLED;
3775}
3776
3777/**
3778 * e1000_clean - NAPI Rx polling callback
3779 * @adapter: board private structure
3780 **/
3781static int e1000_clean(struct napi_struct *napi, int budget)
3782{
3783 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
3784 napi);
3785 int tx_clean_complete = 0, work_done = 0;
3786
3787 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3788
3789 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3790
3791 if (!tx_clean_complete)
3792 work_done = budget;
3793
3794 /* If budget not fully consumed, exit the polling mode */
3795 if (work_done < budget) {
3796 if (likely(adapter->itr_setting & 3))
3797 e1000_set_itr(adapter);
3798 napi_complete(napi);
3799 if (!test_bit(__E1000_DOWN, &adapter->flags))
3800 e1000_irq_enable(adapter);
3801 }
3802
3803 return work_done;
3804}
3805
3806/**
3807 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3808 * @adapter: board private structure
3809 **/
3810static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3811 struct e1000_tx_ring *tx_ring)
3812{
3813 struct e1000_hw *hw = &adapter->hw;
3814 struct net_device *netdev = adapter->netdev;
3815 struct e1000_tx_desc *tx_desc, *eop_desc;
3816 struct e1000_buffer *buffer_info;
3817 unsigned int i, eop;
3818 unsigned int count = 0;
3819 unsigned int total_tx_bytes=0, total_tx_packets=0;
3820 unsigned int bytes_compl = 0, pkts_compl = 0;
3821
3822 i = tx_ring->next_to_clean;
3823 eop = tx_ring->buffer_info[i].next_to_watch;
3824 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3825
3826 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3827 (count < tx_ring->count)) {
3828 bool cleaned = false;
3829 rmb(); /* read buffer_info after eop_desc */
3830 for ( ; !cleaned; count++) {
3831 tx_desc = E1000_TX_DESC(*tx_ring, i);
3832 buffer_info = &tx_ring->buffer_info[i];
3833 cleaned = (i == eop);
3834
3835 if (cleaned) {
3836 total_tx_packets += buffer_info->segs;
3837 total_tx_bytes += buffer_info->bytecount;
3838 if (buffer_info->skb) {
3839 bytes_compl += buffer_info->skb->len;
3840 pkts_compl++;
3841 }
3842
3843 }
3844 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3845 tx_desc->upper.data = 0;
3846
3847 if (unlikely(++i == tx_ring->count)) i = 0;
3848 }
3849
3850 eop = tx_ring->buffer_info[i].next_to_watch;
3851 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3852 }
3853
3854 tx_ring->next_to_clean = i;
3855
3856 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
3857
3858#define TX_WAKE_THRESHOLD 32
3859 if (unlikely(count && netif_carrier_ok(netdev) &&
3860 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3861 /* Make sure that anybody stopping the queue after this
3862 * sees the new next_to_clean.
3863 */
3864 smp_mb();
3865
3866 if (netif_queue_stopped(netdev) &&
3867 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3868 netif_wake_queue(netdev);
3869 ++adapter->restart_queue;
3870 }
3871 }
3872
3873 if (adapter->detect_tx_hung) {
3874 /* Detect a transmit hang in hardware, this serializes the
3875 * check with the clearing of time_stamp and movement of i
3876 */
3877 adapter->detect_tx_hung = false;
3878 if (tx_ring->buffer_info[eop].time_stamp &&
3879 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3880 (adapter->tx_timeout_factor * HZ)) &&
3881 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3882
3883 /* detected Tx unit hang */
3884 e_err(drv, "Detected Tx Unit Hang\n"
3885 " Tx Queue <%lu>\n"
3886 " TDH <%x>\n"
3887 " TDT <%x>\n"
3888 " next_to_use <%x>\n"
3889 " next_to_clean <%x>\n"
3890 "buffer_info[next_to_clean]\n"
3891 " time_stamp <%lx>\n"
3892 " next_to_watch <%x>\n"
3893 " jiffies <%lx>\n"
3894 " next_to_watch.status <%x>\n",
3895 (unsigned long)(tx_ring - adapter->tx_ring),
3896 readl(hw->hw_addr + tx_ring->tdh),
3897 readl(hw->hw_addr + tx_ring->tdt),
3898 tx_ring->next_to_use,
3899 tx_ring->next_to_clean,
3900 tx_ring->buffer_info[eop].time_stamp,
3901 eop,
3902 jiffies,
3903 eop_desc->upper.fields.status);
3904 e1000_dump(adapter);
3905 netif_stop_queue(netdev);
3906 }
3907 }
3908 adapter->total_tx_bytes += total_tx_bytes;
3909 adapter->total_tx_packets += total_tx_packets;
3910 netdev->stats.tx_bytes += total_tx_bytes;
3911 netdev->stats.tx_packets += total_tx_packets;
3912 return count < tx_ring->count;
3913}
3914
3915/**
3916 * e1000_rx_checksum - Receive Checksum Offload for 82543
3917 * @adapter: board private structure
3918 * @status_err: receive descriptor status and error fields
3919 * @csum: receive descriptor csum field
3920 * @sk_buff: socket buffer with received data
3921 **/
3922static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3923 u32 csum, struct sk_buff *skb)
3924{
3925 struct e1000_hw *hw = &adapter->hw;
3926 u16 status = (u16)status_err;
3927 u8 errors = (u8)(status_err >> 24);
3928
3929 skb_checksum_none_assert(skb);
3930
3931 /* 82543 or newer only */
3932 if (unlikely(hw->mac_type < e1000_82543)) return;
3933 /* Ignore Checksum bit is set */
3934 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3935 /* TCP/UDP checksum error bit is set */
3936 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3937 /* let the stack verify checksum errors */
3938 adapter->hw_csum_err++;
3939 return;
3940 }
3941 /* TCP/UDP Checksum has not been calculated */
3942 if (!(status & E1000_RXD_STAT_TCPCS))
3943 return;
3944
3945 /* It must be a TCP or UDP packet with a valid checksum */
3946 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3947 /* TCP checksum is good */
3948 skb->ip_summed = CHECKSUM_UNNECESSARY;
3949 }
3950 adapter->hw_csum_good++;
3951}
3952
3953/**
3954 * e1000_consume_page - helper function
3955 **/
3956static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3957 u16 length)
3958{
3959 bi->page = NULL;
3960 skb->len += length;
3961 skb->data_len += length;
3962 skb->truesize += PAGE_SIZE;
3963}
3964
3965/**
3966 * e1000_receive_skb - helper function to handle rx indications
3967 * @adapter: board private structure
3968 * @status: descriptor status field as written by hardware
3969 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3970 * @skb: pointer to sk_buff to be indicated to stack
3971 */
3972static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3973 __le16 vlan, struct sk_buff *skb)
3974{
3975 skb->protocol = eth_type_trans(skb, adapter->netdev);
3976
3977 if (status & E1000_RXD_STAT_VP) {
3978 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3979
3980 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
3981 }
3982 napi_gro_receive(&adapter->napi, skb);
3983}
3984
3985/**
3986 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3987 * @adapter: board private structure
3988 * @rx_ring: ring to clean
3989 * @work_done: amount of napi work completed this call
3990 * @work_to_do: max amount of work allowed for this call to do
3991 *
3992 * the return value indicates whether actual cleaning was done, there
3993 * is no guarantee that everything was cleaned
3994 */
3995static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
3996 struct e1000_rx_ring *rx_ring,
3997 int *work_done, int work_to_do)
3998{
3999 struct e1000_hw *hw = &adapter->hw;
4000 struct net_device *netdev = adapter->netdev;
4001 struct pci_dev *pdev = adapter->pdev;
4002 struct e1000_rx_desc *rx_desc, *next_rxd;
4003 struct e1000_buffer *buffer_info, *next_buffer;
4004 unsigned long irq_flags;
4005 u32 length;
4006 unsigned int i;
4007 int cleaned_count = 0;
4008 bool cleaned = false;
4009 unsigned int total_rx_bytes=0, total_rx_packets=0;
4010
4011 i = rx_ring->next_to_clean;
4012 rx_desc = E1000_RX_DESC(*rx_ring, i);
4013 buffer_info = &rx_ring->buffer_info[i];
4014
4015 while (rx_desc->status & E1000_RXD_STAT_DD) {
4016 struct sk_buff *skb;
4017 u8 status;
4018
4019 if (*work_done >= work_to_do)
4020 break;
4021 (*work_done)++;
4022 rmb(); /* read descriptor and rx_buffer_info after status DD */
4023
4024 status = rx_desc->status;
4025 skb = buffer_info->skb;
4026 buffer_info->skb = NULL;
4027
4028 if (++i == rx_ring->count) i = 0;
4029 next_rxd = E1000_RX_DESC(*rx_ring, i);
4030 prefetch(next_rxd);
4031
4032 next_buffer = &rx_ring->buffer_info[i];
4033
4034 cleaned = true;
4035 cleaned_count++;
4036 dma_unmap_page(&pdev->dev, buffer_info->dma,
4037 buffer_info->length, DMA_FROM_DEVICE);
4038 buffer_info->dma = 0;
4039
4040 length = le16_to_cpu(rx_desc->length);
4041
4042 /* errors is only valid for DD + EOP descriptors */
4043 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4044 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4045 u8 *mapped;
4046 u8 last_byte;
4047
4048 mapped = page_address(buffer_info->page);
4049 last_byte = *(mapped + length - 1);
4050 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4051 last_byte)) {
4052 spin_lock_irqsave(&adapter->stats_lock,
4053 irq_flags);
4054 e1000_tbi_adjust_stats(hw, &adapter->stats,
4055 length, mapped);
4056 spin_unlock_irqrestore(&adapter->stats_lock,
4057 irq_flags);
4058 length--;
4059 } else {
4060 if (netdev->features & NETIF_F_RXALL)
4061 goto process_skb;
4062 /* recycle both page and skb */
4063 buffer_info->skb = skb;
4064 /* an error means any chain goes out the window
4065 * too
4066 */
4067 if (rx_ring->rx_skb_top)
4068 dev_kfree_skb(rx_ring->rx_skb_top);
4069 rx_ring->rx_skb_top = NULL;
4070 goto next_desc;
4071 }
4072 }
4073
4074#define rxtop rx_ring->rx_skb_top
4075process_skb:
4076 if (!(status & E1000_RXD_STAT_EOP)) {
4077 /* this descriptor is only the beginning (or middle) */
4078 if (!rxtop) {
4079 /* this is the beginning of a chain */
4080 rxtop = skb;
4081 skb_fill_page_desc(rxtop, 0, buffer_info->page,
4082 0, length);
4083 } else {
4084 /* this is the middle of a chain */
4085 skb_fill_page_desc(rxtop,
4086 skb_shinfo(rxtop)->nr_frags,
4087 buffer_info->page, 0, length);
4088 /* re-use the skb, only consumed the page */
4089 buffer_info->skb = skb;
4090 }
4091 e1000_consume_page(buffer_info, rxtop, length);
4092 goto next_desc;
4093 } else {
4094 if (rxtop) {
4095 /* end of the chain */
4096 skb_fill_page_desc(rxtop,
4097 skb_shinfo(rxtop)->nr_frags,
4098 buffer_info->page, 0, length);
4099 /* re-use the current skb, we only consumed the
4100 * page
4101 */
4102 buffer_info->skb = skb;
4103 skb = rxtop;
4104 rxtop = NULL;
4105 e1000_consume_page(buffer_info, skb, length);
4106 } else {
4107 /* no chain, got EOP, this buf is the packet
4108 * copybreak to save the put_page/alloc_page
4109 */
4110 if (length <= copybreak &&
4111 skb_tailroom(skb) >= length) {
4112 u8 *vaddr;
4113 vaddr = kmap_atomic(buffer_info->page);
4114 memcpy(skb_tail_pointer(skb), vaddr,
4115 length);
4116 kunmap_atomic(vaddr);
4117 /* re-use the page, so don't erase
4118 * buffer_info->page
4119 */
4120 skb_put(skb, length);
4121 } else {
4122 skb_fill_page_desc(skb, 0,
4123 buffer_info->page, 0,
4124 length);
4125 e1000_consume_page(buffer_info, skb,
4126 length);
4127 }
4128 }
4129 }
4130
4131 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4132 e1000_rx_checksum(adapter,
4133 (u32)(status) |
4134 ((u32)(rx_desc->errors) << 24),
4135 le16_to_cpu(rx_desc->csum), skb);
4136
4137 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4138 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4139 pskb_trim(skb, skb->len - 4);
4140 total_rx_packets++;
4141
4142 /* eth type trans needs skb->data to point to something */
4143 if (!pskb_may_pull(skb, ETH_HLEN)) {
4144 e_err(drv, "pskb_may_pull failed.\n");
4145 dev_kfree_skb(skb);
4146 goto next_desc;
4147 }
4148
4149 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4150
4151next_desc:
4152 rx_desc->status = 0;
4153
4154 /* return some buffers to hardware, one at a time is too slow */
4155 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4156 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4157 cleaned_count = 0;
4158 }
4159
4160 /* use prefetched values */
4161 rx_desc = next_rxd;
4162 buffer_info = next_buffer;
4163 }
4164 rx_ring->next_to_clean = i;
4165
4166 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4167 if (cleaned_count)
4168 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4169
4170 adapter->total_rx_packets += total_rx_packets;
4171 adapter->total_rx_bytes += total_rx_bytes;
4172 netdev->stats.rx_bytes += total_rx_bytes;
4173 netdev->stats.rx_packets += total_rx_packets;
4174 return cleaned;
4175}
4176
4177/* this should improve performance for small packets with large amounts
4178 * of reassembly being done in the stack
4179 */
4180static void e1000_check_copybreak(struct net_device *netdev,
4181 struct e1000_buffer *buffer_info,
4182 u32 length, struct sk_buff **skb)
4183{
4184 struct sk_buff *new_skb;
4185
4186 if (length > copybreak)
4187 return;
4188
4189 new_skb = netdev_alloc_skb_ip_align(netdev, length);
4190 if (!new_skb)
4191 return;
4192
4193 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
4194 (*skb)->data - NET_IP_ALIGN,
4195 length + NET_IP_ALIGN);
4196 /* save the skb in buffer_info as good */
4197 buffer_info->skb = *skb;
4198 *skb = new_skb;
4199}
4200
4201/**
4202 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4203 * @adapter: board private structure
4204 * @rx_ring: ring to clean
4205 * @work_done: amount of napi work completed this call
4206 * @work_to_do: max amount of work allowed for this call to do
4207 */
4208static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4209 struct e1000_rx_ring *rx_ring,
4210 int *work_done, int work_to_do)
4211{
4212 struct e1000_hw *hw = &adapter->hw;
4213 struct net_device *netdev = adapter->netdev;
4214 struct pci_dev *pdev = adapter->pdev;
4215 struct e1000_rx_desc *rx_desc, *next_rxd;
4216 struct e1000_buffer *buffer_info, *next_buffer;
4217 unsigned long flags;
4218 u32 length;
4219 unsigned int i;
4220 int cleaned_count = 0;
4221 bool cleaned = false;
4222 unsigned int total_rx_bytes=0, total_rx_packets=0;
4223
4224 i = rx_ring->next_to_clean;
4225 rx_desc = E1000_RX_DESC(*rx_ring, i);
4226 buffer_info = &rx_ring->buffer_info[i];
4227
4228 while (rx_desc->status & E1000_RXD_STAT_DD) {
4229 struct sk_buff *skb;
4230 u8 status;
4231
4232 if (*work_done >= work_to_do)
4233 break;
4234 (*work_done)++;
4235 rmb(); /* read descriptor and rx_buffer_info after status DD */
4236
4237 status = rx_desc->status;
4238 skb = buffer_info->skb;
4239 buffer_info->skb = NULL;
4240
4241 prefetch(skb->data - NET_IP_ALIGN);
4242
4243 if (++i == rx_ring->count) i = 0;
4244 next_rxd = E1000_RX_DESC(*rx_ring, i);
4245 prefetch(next_rxd);
4246
4247 next_buffer = &rx_ring->buffer_info[i];
4248
4249 cleaned = true;
4250 cleaned_count++;
4251 dma_unmap_single(&pdev->dev, buffer_info->dma,
4252 buffer_info->length, DMA_FROM_DEVICE);
4253 buffer_info->dma = 0;
4254
4255 length = le16_to_cpu(rx_desc->length);
4256 /* !EOP means multiple descriptors were used to store a single
4257 * packet, if thats the case we need to toss it. In fact, we
4258 * to toss every packet with the EOP bit clear and the next
4259 * frame that _does_ have the EOP bit set, as it is by
4260 * definition only a frame fragment
4261 */
4262 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4263 adapter->discarding = true;
4264
4265 if (adapter->discarding) {
4266 /* All receives must fit into a single buffer */
4267 e_dbg("Receive packet consumed multiple buffers\n");
4268 /* recycle */
4269 buffer_info->skb = skb;
4270 if (status & E1000_RXD_STAT_EOP)
4271 adapter->discarding = false;
4272 goto next_desc;
4273 }
4274
4275 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4276 u8 last_byte = *(skb->data + length - 1);
4277 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4278 last_byte)) {
4279 spin_lock_irqsave(&adapter->stats_lock, flags);
4280 e1000_tbi_adjust_stats(hw, &adapter->stats,
4281 length, skb->data);
4282 spin_unlock_irqrestore(&adapter->stats_lock,
4283 flags);
4284 length--;
4285 } else {
4286 if (netdev->features & NETIF_F_RXALL)
4287 goto process_skb;
4288 /* recycle */
4289 buffer_info->skb = skb;
4290 goto next_desc;
4291 }
4292 }
4293
4294process_skb:
4295 total_rx_bytes += (length - 4); /* don't count FCS */
4296 total_rx_packets++;
4297
4298 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4299 /* adjust length to remove Ethernet CRC, this must be
4300 * done after the TBI_ACCEPT workaround above
4301 */
4302 length -= 4;
4303
4304 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4305
4306 skb_put(skb, length);
4307
4308 /* Receive Checksum Offload */
4309 e1000_rx_checksum(adapter,
4310 (u32)(status) |
4311 ((u32)(rx_desc->errors) << 24),
4312 le16_to_cpu(rx_desc->csum), skb);
4313
4314 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4315
4316next_desc:
4317 rx_desc->status = 0;
4318
4319 /* return some buffers to hardware, one at a time is too slow */
4320 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4321 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4322 cleaned_count = 0;
4323 }
4324
4325 /* use prefetched values */
4326 rx_desc = next_rxd;
4327 buffer_info = next_buffer;
4328 }
4329 rx_ring->next_to_clean = i;
4330
4331 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4332 if (cleaned_count)
4333 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4334
4335 adapter->total_rx_packets += total_rx_packets;
4336 adapter->total_rx_bytes += total_rx_bytes;
4337 netdev->stats.rx_bytes += total_rx_bytes;
4338 netdev->stats.rx_packets += total_rx_packets;
4339 return cleaned;
4340}
4341
4342/**
4343 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4344 * @adapter: address of board private structure
4345 * @rx_ring: pointer to receive ring structure
4346 * @cleaned_count: number of buffers to allocate this pass
4347 **/
4348static void
4349e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4350 struct e1000_rx_ring *rx_ring, int cleaned_count)
4351{
4352 struct net_device *netdev = adapter->netdev;
4353 struct pci_dev *pdev = adapter->pdev;
4354 struct e1000_rx_desc *rx_desc;
4355 struct e1000_buffer *buffer_info;
4356 struct sk_buff *skb;
4357 unsigned int i;
4358 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4359
4360 i = rx_ring->next_to_use;
4361 buffer_info = &rx_ring->buffer_info[i];
4362
4363 while (cleaned_count--) {
4364 skb = buffer_info->skb;
4365 if (skb) {
4366 skb_trim(skb, 0);
4367 goto check_page;
4368 }
4369
4370 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4371 if (unlikely(!skb)) {
4372 /* Better luck next round */
4373 adapter->alloc_rx_buff_failed++;
4374 break;
4375 }
4376
4377 buffer_info->skb = skb;
4378 buffer_info->length = adapter->rx_buffer_len;
4379check_page:
4380 /* allocate a new page if necessary */
4381 if (!buffer_info->page) {
4382 buffer_info->page = alloc_page(GFP_ATOMIC);
4383 if (unlikely(!buffer_info->page)) {
4384 adapter->alloc_rx_buff_failed++;
4385 break;
4386 }
4387 }
4388
4389 if (!buffer_info->dma) {
4390 buffer_info->dma = dma_map_page(&pdev->dev,
4391 buffer_info->page, 0,
4392 buffer_info->length,
4393 DMA_FROM_DEVICE);
4394 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4395 put_page(buffer_info->page);
4396 dev_kfree_skb(skb);
4397 buffer_info->page = NULL;
4398 buffer_info->skb = NULL;
4399 buffer_info->dma = 0;
4400 adapter->alloc_rx_buff_failed++;
4401 break; /* while !buffer_info->skb */
4402 }
4403 }
4404
4405 rx_desc = E1000_RX_DESC(*rx_ring, i);
4406 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4407
4408 if (unlikely(++i == rx_ring->count))
4409 i = 0;
4410 buffer_info = &rx_ring->buffer_info[i];
4411 }
4412
4413 if (likely(rx_ring->next_to_use != i)) {
4414 rx_ring->next_to_use = i;
4415 if (unlikely(i-- == 0))
4416 i = (rx_ring->count - 1);
4417
4418 /* Force memory writes to complete before letting h/w
4419 * know there are new descriptors to fetch. (Only
4420 * applicable for weak-ordered memory model archs,
4421 * such as IA-64).
4422 */
4423 wmb();
4424 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4425 }
4426}
4427
4428/**
4429 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4430 * @adapter: address of board private structure
4431 **/
4432static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4433 struct e1000_rx_ring *rx_ring,
4434 int cleaned_count)
4435{
4436 struct e1000_hw *hw = &adapter->hw;
4437 struct net_device *netdev = adapter->netdev;
4438 struct pci_dev *pdev = adapter->pdev;
4439 struct e1000_rx_desc *rx_desc;
4440 struct e1000_buffer *buffer_info;
4441 struct sk_buff *skb;
4442 unsigned int i;
4443 unsigned int bufsz = adapter->rx_buffer_len;
4444
4445 i = rx_ring->next_to_use;
4446 buffer_info = &rx_ring->buffer_info[i];
4447
4448 while (cleaned_count--) {
4449 skb = buffer_info->skb;
4450 if (skb) {
4451 skb_trim(skb, 0);
4452 goto map_skb;
4453 }
4454
4455 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4456 if (unlikely(!skb)) {
4457 /* Better luck next round */
4458 adapter->alloc_rx_buff_failed++;
4459 break;
4460 }
4461
4462 /* Fix for errata 23, can't cross 64kB boundary */
4463 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4464 struct sk_buff *oldskb = skb;
4465 e_err(rx_err, "skb align check failed: %u bytes at "
4466 "%p\n", bufsz, skb->data);
4467 /* Try again, without freeing the previous */
4468 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4469 /* Failed allocation, critical failure */
4470 if (!skb) {
4471 dev_kfree_skb(oldskb);
4472 adapter->alloc_rx_buff_failed++;
4473 break;
4474 }
4475
4476 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4477 /* give up */
4478 dev_kfree_skb(skb);
4479 dev_kfree_skb(oldskb);
4480 adapter->alloc_rx_buff_failed++;
4481 break; /* while !buffer_info->skb */
4482 }
4483
4484 /* Use new allocation */
4485 dev_kfree_skb(oldskb);
4486 }
4487 buffer_info->skb = skb;
4488 buffer_info->length = adapter->rx_buffer_len;
4489map_skb:
4490 buffer_info->dma = dma_map_single(&pdev->dev,
4491 skb->data,
4492 buffer_info->length,
4493 DMA_FROM_DEVICE);
4494 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4495 dev_kfree_skb(skb);
4496 buffer_info->skb = NULL;
4497 buffer_info->dma = 0;
4498 adapter->alloc_rx_buff_failed++;
4499 break; /* while !buffer_info->skb */
4500 }
4501
4502 /* XXX if it was allocated cleanly it will never map to a
4503 * boundary crossing
4504 */
4505
4506 /* Fix for errata 23, can't cross 64kB boundary */
4507 if (!e1000_check_64k_bound(adapter,
4508 (void *)(unsigned long)buffer_info->dma,
4509 adapter->rx_buffer_len)) {
4510 e_err(rx_err, "dma align check failed: %u bytes at "
4511 "%p\n", adapter->rx_buffer_len,
4512 (void *)(unsigned long)buffer_info->dma);
4513 dev_kfree_skb(skb);
4514 buffer_info->skb = NULL;
4515
4516 dma_unmap_single(&pdev->dev, buffer_info->dma,
4517 adapter->rx_buffer_len,
4518 DMA_FROM_DEVICE);
4519 buffer_info->dma = 0;
4520
4521 adapter->alloc_rx_buff_failed++;
4522 break; /* while !buffer_info->skb */
4523 }
4524 rx_desc = E1000_RX_DESC(*rx_ring, i);
4525 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4526
4527 if (unlikely(++i == rx_ring->count))
4528 i = 0;
4529 buffer_info = &rx_ring->buffer_info[i];
4530 }
4531
4532 if (likely(rx_ring->next_to_use != i)) {
4533 rx_ring->next_to_use = i;
4534 if (unlikely(i-- == 0))
4535 i = (rx_ring->count - 1);
4536
4537 /* Force memory writes to complete before letting h/w
4538 * know there are new descriptors to fetch. (Only
4539 * applicable for weak-ordered memory model archs,
4540 * such as IA-64).
4541 */
4542 wmb();
4543 writel(i, hw->hw_addr + rx_ring->rdt);
4544 }
4545}
4546
4547/**
4548 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4549 * @adapter:
4550 **/
4551static void e1000_smartspeed(struct e1000_adapter *adapter)
4552{
4553 struct e1000_hw *hw = &adapter->hw;
4554 u16 phy_status;
4555 u16 phy_ctrl;
4556
4557 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4558 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4559 return;
4560
4561 if (adapter->smartspeed == 0) {
4562 /* If Master/Slave config fault is asserted twice,
4563 * we assume back-to-back
4564 */
4565 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4566 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4567 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4568 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4569 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4570 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4571 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4572 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4573 phy_ctrl);
4574 adapter->smartspeed++;
4575 if (!e1000_phy_setup_autoneg(hw) &&
4576 !e1000_read_phy_reg(hw, PHY_CTRL,
4577 &phy_ctrl)) {
4578 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4579 MII_CR_RESTART_AUTO_NEG);
4580 e1000_write_phy_reg(hw, PHY_CTRL,
4581 phy_ctrl);
4582 }
4583 }
4584 return;
4585 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4586 /* If still no link, perhaps using 2/3 pair cable */
4587 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4588 phy_ctrl |= CR_1000T_MS_ENABLE;
4589 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4590 if (!e1000_phy_setup_autoneg(hw) &&
4591 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4592 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4593 MII_CR_RESTART_AUTO_NEG);
4594 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4595 }
4596 }
4597 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4598 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4599 adapter->smartspeed = 0;
4600}
4601
4602/**
4603 * e1000_ioctl -
4604 * @netdev:
4605 * @ifreq:
4606 * @cmd:
4607 **/
4608static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4609{
4610 switch (cmd) {
4611 case SIOCGMIIPHY:
4612 case SIOCGMIIREG:
4613 case SIOCSMIIREG:
4614 return e1000_mii_ioctl(netdev, ifr, cmd);
4615 default:
4616 return -EOPNOTSUPP;
4617 }
4618}
4619
4620/**
4621 * e1000_mii_ioctl -
4622 * @netdev:
4623 * @ifreq:
4624 * @cmd:
4625 **/
4626static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4627 int cmd)
4628{
4629 struct e1000_adapter *adapter = netdev_priv(netdev);
4630 struct e1000_hw *hw = &adapter->hw;
4631 struct mii_ioctl_data *data = if_mii(ifr);
4632 int retval;
4633 u16 mii_reg;
4634 unsigned long flags;
4635
4636 if (hw->media_type != e1000_media_type_copper)
4637 return -EOPNOTSUPP;
4638
4639 switch (cmd) {
4640 case SIOCGMIIPHY:
4641 data->phy_id = hw->phy_addr;
4642 break;
4643 case SIOCGMIIREG:
4644 spin_lock_irqsave(&adapter->stats_lock, flags);
4645 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4646 &data->val_out)) {
4647 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4648 return -EIO;
4649 }
4650 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4651 break;
4652 case SIOCSMIIREG:
4653 if (data->reg_num & ~(0x1F))
4654 return -EFAULT;
4655 mii_reg = data->val_in;
4656 spin_lock_irqsave(&adapter->stats_lock, flags);
4657 if (e1000_write_phy_reg(hw, data->reg_num,
4658 mii_reg)) {
4659 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4660 return -EIO;
4661 }
4662 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4663 if (hw->media_type == e1000_media_type_copper) {
4664 switch (data->reg_num) {
4665 case PHY_CTRL:
4666 if (mii_reg & MII_CR_POWER_DOWN)
4667 break;
4668 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4669 hw->autoneg = 1;
4670 hw->autoneg_advertised = 0x2F;
4671 } else {
4672 u32 speed;
4673 if (mii_reg & 0x40)
4674 speed = SPEED_1000;
4675 else if (mii_reg & 0x2000)
4676 speed = SPEED_100;
4677 else
4678 speed = SPEED_10;
4679 retval = e1000_set_spd_dplx(
4680 adapter, speed,
4681 ((mii_reg & 0x100)
4682 ? DUPLEX_FULL :
4683 DUPLEX_HALF));
4684 if (retval)
4685 return retval;
4686 }
4687 if (netif_running(adapter->netdev))
4688 e1000_reinit_locked(adapter);
4689 else
4690 e1000_reset(adapter);
4691 break;
4692 case M88E1000_PHY_SPEC_CTRL:
4693 case M88E1000_EXT_PHY_SPEC_CTRL:
4694 if (e1000_phy_reset(hw))
4695 return -EIO;
4696 break;
4697 }
4698 } else {
4699 switch (data->reg_num) {
4700 case PHY_CTRL:
4701 if (mii_reg & MII_CR_POWER_DOWN)
4702 break;
4703 if (netif_running(adapter->netdev))
4704 e1000_reinit_locked(adapter);
4705 else
4706 e1000_reset(adapter);
4707 break;
4708 }
4709 }
4710 break;
4711 default:
4712 return -EOPNOTSUPP;
4713 }
4714 return E1000_SUCCESS;
4715}
4716
4717void e1000_pci_set_mwi(struct e1000_hw *hw)
4718{
4719 struct e1000_adapter *adapter = hw->back;
4720 int ret_val = pci_set_mwi(adapter->pdev);
4721
4722 if (ret_val)
4723 e_err(probe, "Error in setting MWI\n");
4724}
4725
4726void e1000_pci_clear_mwi(struct e1000_hw *hw)
4727{
4728 struct e1000_adapter *adapter = hw->back;
4729
4730 pci_clear_mwi(adapter->pdev);
4731}
4732
4733int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4734{
4735 struct e1000_adapter *adapter = hw->back;
4736 return pcix_get_mmrbc(adapter->pdev);
4737}
4738
4739void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4740{
4741 struct e1000_adapter *adapter = hw->back;
4742 pcix_set_mmrbc(adapter->pdev, mmrbc);
4743}
4744
4745void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4746{
4747 outl(value, port);
4748}
4749
4750static bool e1000_vlan_used(struct e1000_adapter *adapter)
4751{
4752 u16 vid;
4753
4754 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4755 return true;
4756 return false;
4757}
4758
4759static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4760 netdev_features_t features)
4761{
4762 struct e1000_hw *hw = &adapter->hw;
4763 u32 ctrl;
4764
4765 ctrl = er32(CTRL);
4766 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
4767 /* enable VLAN tag insert/strip */
4768 ctrl |= E1000_CTRL_VME;
4769 } else {
4770 /* disable VLAN tag insert/strip */
4771 ctrl &= ~E1000_CTRL_VME;
4772 }
4773 ew32(CTRL, ctrl);
4774}
4775static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4776 bool filter_on)
4777{
4778 struct e1000_hw *hw = &adapter->hw;
4779 u32 rctl;
4780
4781 if (!test_bit(__E1000_DOWN, &adapter->flags))
4782 e1000_irq_disable(adapter);
4783
4784 __e1000_vlan_mode(adapter, adapter->netdev->features);
4785 if (filter_on) {
4786 /* enable VLAN receive filtering */
4787 rctl = er32(RCTL);
4788 rctl &= ~E1000_RCTL_CFIEN;
4789 if (!(adapter->netdev->flags & IFF_PROMISC))
4790 rctl |= E1000_RCTL_VFE;
4791 ew32(RCTL, rctl);
4792 e1000_update_mng_vlan(adapter);
4793 } else {
4794 /* disable VLAN receive filtering */
4795 rctl = er32(RCTL);
4796 rctl &= ~E1000_RCTL_VFE;
4797 ew32(RCTL, rctl);
4798 }
4799
4800 if (!test_bit(__E1000_DOWN, &adapter->flags))
4801 e1000_irq_enable(adapter);
4802}
4803
4804static void e1000_vlan_mode(struct net_device *netdev,
4805 netdev_features_t features)
4806{
4807 struct e1000_adapter *adapter = netdev_priv(netdev);
4808
4809 if (!test_bit(__E1000_DOWN, &adapter->flags))
4810 e1000_irq_disable(adapter);
4811
4812 __e1000_vlan_mode(adapter, features);
4813
4814 if (!test_bit(__E1000_DOWN, &adapter->flags))
4815 e1000_irq_enable(adapter);
4816}
4817
4818static int e1000_vlan_rx_add_vid(struct net_device *netdev,
4819 __be16 proto, u16 vid)
4820{
4821 struct e1000_adapter *adapter = netdev_priv(netdev);
4822 struct e1000_hw *hw = &adapter->hw;
4823 u32 vfta, index;
4824
4825 if ((hw->mng_cookie.status &
4826 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4827 (vid == adapter->mng_vlan_id))
4828 return 0;
4829
4830 if (!e1000_vlan_used(adapter))
4831 e1000_vlan_filter_on_off(adapter, true);
4832
4833 /* add VID to filter table */
4834 index = (vid >> 5) & 0x7F;
4835 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4836 vfta |= (1 << (vid & 0x1F));
4837 e1000_write_vfta(hw, index, vfta);
4838
4839 set_bit(vid, adapter->active_vlans);
4840
4841 return 0;
4842}
4843
4844static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
4845 __be16 proto, u16 vid)
4846{
4847 struct e1000_adapter *adapter = netdev_priv(netdev);
4848 struct e1000_hw *hw = &adapter->hw;
4849 u32 vfta, index;
4850
4851 if (!test_bit(__E1000_DOWN, &adapter->flags))
4852 e1000_irq_disable(adapter);
4853 if (!test_bit(__E1000_DOWN, &adapter->flags))
4854 e1000_irq_enable(adapter);
4855
4856 /* remove VID from filter table */
4857 index = (vid >> 5) & 0x7F;
4858 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4859 vfta &= ~(1 << (vid & 0x1F));
4860 e1000_write_vfta(hw, index, vfta);
4861
4862 clear_bit(vid, adapter->active_vlans);
4863
4864 if (!e1000_vlan_used(adapter))
4865 e1000_vlan_filter_on_off(adapter, false);
4866
4867 return 0;
4868}
4869
4870static void e1000_restore_vlan(struct e1000_adapter *adapter)
4871{
4872 u16 vid;
4873
4874 if (!e1000_vlan_used(adapter))
4875 return;
4876
4877 e1000_vlan_filter_on_off(adapter, true);
4878 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4879 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
4880}
4881
4882int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4883{
4884 struct e1000_hw *hw = &adapter->hw;
4885
4886 hw->autoneg = 0;
4887
4888 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4889 * for the switch() below to work
4890 */
4891 if ((spd & 1) || (dplx & ~1))
4892 goto err_inval;
4893
4894 /* Fiber NICs only allow 1000 gbps Full duplex */
4895 if ((hw->media_type == e1000_media_type_fiber) &&
4896 spd != SPEED_1000 &&
4897 dplx != DUPLEX_FULL)
4898 goto err_inval;
4899
4900 switch (spd + dplx) {
4901 case SPEED_10 + DUPLEX_HALF:
4902 hw->forced_speed_duplex = e1000_10_half;
4903 break;
4904 case SPEED_10 + DUPLEX_FULL:
4905 hw->forced_speed_duplex = e1000_10_full;
4906 break;
4907 case SPEED_100 + DUPLEX_HALF:
4908 hw->forced_speed_duplex = e1000_100_half;
4909 break;
4910 case SPEED_100 + DUPLEX_FULL:
4911 hw->forced_speed_duplex = e1000_100_full;
4912 break;
4913 case SPEED_1000 + DUPLEX_FULL:
4914 hw->autoneg = 1;
4915 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4916 break;
4917 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4918 default:
4919 goto err_inval;
4920 }
4921
4922 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
4923 hw->mdix = AUTO_ALL_MODES;
4924
4925 return 0;
4926
4927err_inval:
4928 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4929 return -EINVAL;
4930}
4931
4932static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4933{
4934 struct net_device *netdev = pci_get_drvdata(pdev);
4935 struct e1000_adapter *adapter = netdev_priv(netdev);
4936 struct e1000_hw *hw = &adapter->hw;
4937 u32 ctrl, ctrl_ext, rctl, status;
4938 u32 wufc = adapter->wol;
4939#ifdef CONFIG_PM
4940 int retval = 0;
4941#endif
4942
4943 netif_device_detach(netdev);
4944
4945 if (netif_running(netdev)) {
4946 int count = E1000_CHECK_RESET_COUNT;
4947
4948 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
4949 usleep_range(10000, 20000);
4950
4951 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4952 e1000_down(adapter);
4953 }
4954
4955#ifdef CONFIG_PM
4956 retval = pci_save_state(pdev);
4957 if (retval)
4958 return retval;
4959#endif
4960
4961 status = er32(STATUS);
4962 if (status & E1000_STATUS_LU)
4963 wufc &= ~E1000_WUFC_LNKC;
4964
4965 if (wufc) {
4966 e1000_setup_rctl(adapter);
4967 e1000_set_rx_mode(netdev);
4968
4969 rctl = er32(RCTL);
4970
4971 /* turn on all-multi mode if wake on multicast is enabled */
4972 if (wufc & E1000_WUFC_MC)
4973 rctl |= E1000_RCTL_MPE;
4974
4975 /* enable receives in the hardware */
4976 ew32(RCTL, rctl | E1000_RCTL_EN);
4977
4978 if (hw->mac_type >= e1000_82540) {
4979 ctrl = er32(CTRL);
4980 /* advertise wake from D3Cold */
4981 #define E1000_CTRL_ADVD3WUC 0x00100000
4982 /* phy power management enable */
4983 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4984 ctrl |= E1000_CTRL_ADVD3WUC |
4985 E1000_CTRL_EN_PHY_PWR_MGMT;
4986 ew32(CTRL, ctrl);
4987 }
4988
4989 if (hw->media_type == e1000_media_type_fiber ||
4990 hw->media_type == e1000_media_type_internal_serdes) {
4991 /* keep the laser running in D3 */
4992 ctrl_ext = er32(CTRL_EXT);
4993 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4994 ew32(CTRL_EXT, ctrl_ext);
4995 }
4996
4997 ew32(WUC, E1000_WUC_PME_EN);
4998 ew32(WUFC, wufc);
4999 } else {
5000 ew32(WUC, 0);
5001 ew32(WUFC, 0);
5002 }
5003
5004 e1000_release_manageability(adapter);
5005
5006 *enable_wake = !!wufc;
5007
5008 /* make sure adapter isn't asleep if manageability is enabled */
5009 if (adapter->en_mng_pt)
5010 *enable_wake = true;
5011
5012 if (netif_running(netdev))
5013 e1000_free_irq(adapter);
5014
5015 pci_disable_device(pdev);
5016
5017 return 0;
5018}
5019
5020#ifdef CONFIG_PM
5021static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5022{
5023 int retval;
5024 bool wake;
5025
5026 retval = __e1000_shutdown(pdev, &wake);
5027 if (retval)
5028 return retval;
5029
5030 if (wake) {
5031 pci_prepare_to_sleep(pdev);
5032 } else {
5033 pci_wake_from_d3(pdev, false);
5034 pci_set_power_state(pdev, PCI_D3hot);
5035 }
5036
5037 return 0;
5038}
5039
5040static int e1000_resume(struct pci_dev *pdev)
5041{
5042 struct net_device *netdev = pci_get_drvdata(pdev);
5043 struct e1000_adapter *adapter = netdev_priv(netdev);
5044 struct e1000_hw *hw = &adapter->hw;
5045 u32 err;
5046
5047 pci_set_power_state(pdev, PCI_D0);
5048 pci_restore_state(pdev);
5049 pci_save_state(pdev);
5050
5051 if (adapter->need_ioport)
5052 err = pci_enable_device(pdev);
5053 else
5054 err = pci_enable_device_mem(pdev);
5055 if (err) {
5056 pr_err("Cannot enable PCI device from suspend\n");
5057 return err;
5058 }
5059 pci_set_master(pdev);
5060
5061 pci_enable_wake(pdev, PCI_D3hot, 0);
5062 pci_enable_wake(pdev, PCI_D3cold, 0);
5063
5064 if (netif_running(netdev)) {
5065 err = e1000_request_irq(adapter);
5066 if (err)
5067 return err;
5068 }
5069
5070 e1000_power_up_phy(adapter);
5071 e1000_reset(adapter);
5072 ew32(WUS, ~0);
5073
5074 e1000_init_manageability(adapter);
5075
5076 if (netif_running(netdev))
5077 e1000_up(adapter);
5078
5079 netif_device_attach(netdev);
5080
5081 return 0;
5082}
5083#endif
5084
5085static void e1000_shutdown(struct pci_dev *pdev)
5086{
5087 bool wake;
5088
5089 __e1000_shutdown(pdev, &wake);
5090
5091 if (system_state == SYSTEM_POWER_OFF) {
5092 pci_wake_from_d3(pdev, wake);
5093 pci_set_power_state(pdev, PCI_D3hot);
5094 }
5095}
5096
5097#ifdef CONFIG_NET_POLL_CONTROLLER
5098/* Polling 'interrupt' - used by things like netconsole to send skbs
5099 * without having to re-enable interrupts. It's not called while
5100 * the interrupt routine is executing.
5101 */
5102static void e1000_netpoll(struct net_device *netdev)
5103{
5104 struct e1000_adapter *adapter = netdev_priv(netdev);
5105
5106 disable_irq(adapter->pdev->irq);
5107 e1000_intr(adapter->pdev->irq, netdev);
5108 enable_irq(adapter->pdev->irq);
5109}
5110#endif
5111
5112/**
5113 * e1000_io_error_detected - called when PCI error is detected
5114 * @pdev: Pointer to PCI device
5115 * @state: The current pci connection state
5116 *
5117 * This function is called after a PCI bus error affecting
5118 * this device has been detected.
5119 */
5120static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5121 pci_channel_state_t state)
5122{
5123 struct net_device *netdev = pci_get_drvdata(pdev);
5124 struct e1000_adapter *adapter = netdev_priv(netdev);
5125
5126 netif_device_detach(netdev);
5127
5128 if (state == pci_channel_io_perm_failure)
5129 return PCI_ERS_RESULT_DISCONNECT;
5130
5131 if (netif_running(netdev))
5132 e1000_down(adapter);
5133 pci_disable_device(pdev);
5134
5135 /* Request a slot slot reset. */
5136 return PCI_ERS_RESULT_NEED_RESET;
5137}
5138
5139/**
5140 * e1000_io_slot_reset - called after the pci bus has been reset.
5141 * @pdev: Pointer to PCI device
5142 *
5143 * Restart the card from scratch, as if from a cold-boot. Implementation
5144 * resembles the first-half of the e1000_resume routine.
5145 */
5146static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5147{
5148 struct net_device *netdev = pci_get_drvdata(pdev);
5149 struct e1000_adapter *adapter = netdev_priv(netdev);
5150 struct e1000_hw *hw = &adapter->hw;
5151 int err;
5152
5153 if (adapter->need_ioport)
5154 err = pci_enable_device(pdev);
5155 else
5156 err = pci_enable_device_mem(pdev);
5157 if (err) {
5158 pr_err("Cannot re-enable PCI device after reset.\n");
5159 return PCI_ERS_RESULT_DISCONNECT;
5160 }
5161 pci_set_master(pdev);
5162
5163 pci_enable_wake(pdev, PCI_D3hot, 0);
5164 pci_enable_wake(pdev, PCI_D3cold, 0);
5165
5166 e1000_reset(adapter);
5167 ew32(WUS, ~0);
5168
5169 return PCI_ERS_RESULT_RECOVERED;
5170}
5171
5172/**
5173 * e1000_io_resume - called when traffic can start flowing again.
5174 * @pdev: Pointer to PCI device
5175 *
5176 * This callback is called when the error recovery driver tells us that
5177 * its OK to resume normal operation. Implementation resembles the
5178 * second-half of the e1000_resume routine.
5179 */
5180static void e1000_io_resume(struct pci_dev *pdev)
5181{
5182 struct net_device *netdev = pci_get_drvdata(pdev);
5183 struct e1000_adapter *adapter = netdev_priv(netdev);
5184
5185 e1000_init_manageability(adapter);
5186
5187 if (netif_running(netdev)) {
5188 if (e1000_up(adapter)) {
5189 pr_info("can't bring device back up after reset\n");
5190 return;
5191 }
5192 }
5193
5194 netif_device_attach(netdev);
5195}
5196
5197/* e1000_main.c */