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[PATCH] sky2: optimize receive restart
[linux-2.6-block.git] / drivers / net / e1000 / e1000_main.c
CommitLineData
1da177e4
LT		 1/*******************************************************************************
2
3
3d41e30a 4 Copyright(c) 1999 - 2006 Intel Corporation. All rights reserved.
1da177e4
LT		 5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2 of the License, or (at your option)
9 any later version.
10
11 This program is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 more details.
15
16 You should have received a copy of the GNU General Public License along with
17 this program; if not, write to the Free Software Foundation, Inc., 59
18 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19
20 The full GNU General Public License is included in this distribution in the
21 file called LICENSE.
22
23 Contact Information:
24 Linux NICS <linux.nics@intel.com>
3d41e30a 25 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
1da177e4
LT		 26 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27
28*******************************************************************************/
29
30#include "e1000.h"
31
1da177e4 32char e1000_driver_name[] = "e1000";
3ad2cc67 33static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
1da177e4
LT		 34#ifndef CONFIG_E1000_NAPI
35#define DRIVERNAPI
36#else
37#define DRIVERNAPI "-NAPI"
38#endif
e4ac9773 39#define DRV_VERSION "7.1.9-k2"DRIVERNAPI
1da177e4 40char e1000_driver_version[] = DRV_VERSION;
3d41e30a 41static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
1da177e4
LT		 42
43/* e1000_pci_tbl - PCI Device ID Table
44 *
45 * Last entry must be all 0s
46 *
47 * Macro expands to...
48 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
49 */
50static struct pci_device_id e1000_pci_tbl[] = {
51 INTEL_E1000_ETHERNET_DEVICE(0x1000),
52 INTEL_E1000_ETHERNET_DEVICE(0x1001),
53 INTEL_E1000_ETHERNET_DEVICE(0x1004),
54 INTEL_E1000_ETHERNET_DEVICE(0x1008),
55 INTEL_E1000_ETHERNET_DEVICE(0x1009),
56 INTEL_E1000_ETHERNET_DEVICE(0x100C),
57 INTEL_E1000_ETHERNET_DEVICE(0x100D),
58 INTEL_E1000_ETHERNET_DEVICE(0x100E),
59 INTEL_E1000_ETHERNET_DEVICE(0x100F),
60 INTEL_E1000_ETHERNET_DEVICE(0x1010),
61 INTEL_E1000_ETHERNET_DEVICE(0x1011),
62 INTEL_E1000_ETHERNET_DEVICE(0x1012),
63 INTEL_E1000_ETHERNET_DEVICE(0x1013),
64 INTEL_E1000_ETHERNET_DEVICE(0x1014),
65 INTEL_E1000_ETHERNET_DEVICE(0x1015),
66 INTEL_E1000_ETHERNET_DEVICE(0x1016),
67 INTEL_E1000_ETHERNET_DEVICE(0x1017),
68 INTEL_E1000_ETHERNET_DEVICE(0x1018),
69 INTEL_E1000_ETHERNET_DEVICE(0x1019),
2648345f 70 INTEL_E1000_ETHERNET_DEVICE(0x101A),
1da177e4
LT		 71 INTEL_E1000_ETHERNET_DEVICE(0x101D),
72 INTEL_E1000_ETHERNET_DEVICE(0x101E),
73 INTEL_E1000_ETHERNET_DEVICE(0x1026),
74 INTEL_E1000_ETHERNET_DEVICE(0x1027),
75 INTEL_E1000_ETHERNET_DEVICE(0x1028),
ae2c3860
AK		 76 INTEL_E1000_ETHERNET_DEVICE(0x1049),
77 INTEL_E1000_ETHERNET_DEVICE(0x104A),
78 INTEL_E1000_ETHERNET_DEVICE(0x104B),
79 INTEL_E1000_ETHERNET_DEVICE(0x104C),
80 INTEL_E1000_ETHERNET_DEVICE(0x104D),
07b8fede
MC		 81 INTEL_E1000_ETHERNET_DEVICE(0x105E),
82 INTEL_E1000_ETHERNET_DEVICE(0x105F),
83 INTEL_E1000_ETHERNET_DEVICE(0x1060),
1da177e4
LT		 84 INTEL_E1000_ETHERNET_DEVICE(0x1075),
85 INTEL_E1000_ETHERNET_DEVICE(0x1076),
86 INTEL_E1000_ETHERNET_DEVICE(0x1077),
87 INTEL_E1000_ETHERNET_DEVICE(0x1078),
88 INTEL_E1000_ETHERNET_DEVICE(0x1079),
89 INTEL_E1000_ETHERNET_DEVICE(0x107A),
90 INTEL_E1000_ETHERNET_DEVICE(0x107B),
91 INTEL_E1000_ETHERNET_DEVICE(0x107C),
07b8fede
MC		 92 INTEL_E1000_ETHERNET_DEVICE(0x107D),
93 INTEL_E1000_ETHERNET_DEVICE(0x107E),
94 INTEL_E1000_ETHERNET_DEVICE(0x107F),
1da177e4 95 INTEL_E1000_ETHERNET_DEVICE(0x108A),
2648345f
MC		 96 INTEL_E1000_ETHERNET_DEVICE(0x108B),
97 INTEL_E1000_ETHERNET_DEVICE(0x108C),
6418ecc6
JK		 98 INTEL_E1000_ETHERNET_DEVICE(0x1096),
99 INTEL_E1000_ETHERNET_DEVICE(0x1098),
b7ee49db 100 INTEL_E1000_ETHERNET_DEVICE(0x1099),
07b8fede 101 INTEL_E1000_ETHERNET_DEVICE(0x109A),
b7ee49db 102 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
6418ecc6 103 INTEL_E1000_ETHERNET_DEVICE(0x10B9),
ae2c3860
AK		 104 INTEL_E1000_ETHERNET_DEVICE(0x10BA),
105 INTEL_E1000_ETHERNET_DEVICE(0x10BB),
1da177e4
LT		 106 /* required last entry */
107 {0,}
108};
109
110MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
111
3ad2cc67 112static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
0f15a8fa 113 struct e1000_tx_ring *txdr);
3ad2cc67 114static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
0f15a8fa 115 struct e1000_rx_ring *rxdr);
3ad2cc67 116static void e1000_free_tx_resources(struct e1000_adapter *adapter,
0f15a8fa 117 struct e1000_tx_ring *tx_ring);
3ad2cc67 118static void e1000_free_rx_resources(struct e1000_adapter *adapter,
0f15a8fa 119 struct e1000_rx_ring *rx_ring);
1da177e4
LT		 120
121/* Local Function Prototypes */
122
123static int e1000_init_module(void);
124static void e1000_exit_module(void);
125static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
126static void __devexit e1000_remove(struct pci_dev *pdev);
581d708e 127static int e1000_alloc_queues(struct e1000_adapter *adapter);
1da177e4
LT		 128static int e1000_sw_init(struct e1000_adapter *adapter);
129static int e1000_open(struct net_device *netdev);
130static int e1000_close(struct net_device *netdev);
131static void e1000_configure_tx(struct e1000_adapter *adapter);
132static void e1000_configure_rx(struct e1000_adapter *adapter);
133static void e1000_setup_rctl(struct e1000_adapter *adapter);
581d708e
MC		 134static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
135static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
136static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
137 struct e1000_tx_ring *tx_ring);
138static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
139 struct e1000_rx_ring *rx_ring);
1da177e4
LT		 140static void e1000_set_multi(struct net_device *netdev);
141static void e1000_update_phy_info(unsigned long data);
142static void e1000_watchdog(unsigned long data);
1da177e4
LT		 143static void e1000_82547_tx_fifo_stall(unsigned long data);
144static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
145static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
146static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
147static int e1000_set_mac(struct net_device *netdev, void *p);
148static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
581d708e
MC		 149static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
150 struct e1000_tx_ring *tx_ring);
1da177e4 151#ifdef CONFIG_E1000_NAPI
581d708e 152static int e1000_clean(struct net_device *poll_dev, int *budget);
1da177e4 153static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
581d708e 154 struct e1000_rx_ring *rx_ring,
1da177e4 155 int *work_done, int work_to_do);
2d7edb92 156static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
581d708e 157 struct e1000_rx_ring *rx_ring,
2d7edb92 158 int *work_done, int work_to_do);
1da177e4 159#else
581d708e
MC		 160static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
161 struct e1000_rx_ring *rx_ring);
162static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
163 struct e1000_rx_ring *rx_ring);
1da177e4 164#endif
581d708e 165static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
72d64a43
JK		 166 struct e1000_rx_ring *rx_ring,
167 int cleaned_count);
581d708e 168static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
72d64a43
JK		 169 struct e1000_rx_ring *rx_ring,
170 int cleaned_count);
1da177e4
LT		 171static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
172static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
173 int cmd);
1da177e4
LT		 174static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
175static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
176static void e1000_tx_timeout(struct net_device *dev);
87041639 177static void e1000_reset_task(struct net_device *dev);
1da177e4 178static void e1000_smartspeed(struct e1000_adapter *adapter);
e619d523
AK		 179static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
180 struct sk_buff *skb);
1da177e4
LT		 181
182static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
183static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
184static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
185static void e1000_restore_vlan(struct e1000_adapter *adapter);
186
977e74b5 187static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
6fdfef16 188#ifdef CONFIG_PM
1da177e4
LT		 189static int e1000_resume(struct pci_dev *pdev);
190#endif
c653e635 191static void e1000_shutdown(struct pci_dev *pdev);
1da177e4
LT		 192
193#ifdef CONFIG_NET_POLL_CONTROLLER
194/* for netdump / net console */
195static void e1000_netpoll (struct net_device *netdev);
196#endif
197
9026729b
AK		 198static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
199 pci_channel_state_t state);
200static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
201static void e1000_io_resume(struct pci_dev *pdev);
202
203static struct pci_error_handlers e1000_err_handler = {
204 .error_detected = e1000_io_error_detected,
205 .slot_reset = e1000_io_slot_reset,
206 .resume = e1000_io_resume,
207};
24025e4e 208
1da177e4
LT		 209static struct pci_driver e1000_driver = {
210 .name = e1000_driver_name,
211 .id_table = e1000_pci_tbl,
212 .probe = e1000_probe,
213 .remove = __devexit_p(e1000_remove),
214 /* Power Managment Hooks */
1da177e4 215 .suspend = e1000_suspend,
6fdfef16 216#ifdef CONFIG_PM
c653e635 217 .resume = e1000_resume,
1da177e4 218#endif
9026729b
AK		 219 .shutdown = e1000_shutdown,
220 .err_handler = &e1000_err_handler
1da177e4
LT		 221};
222
223MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
224MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
225MODULE_LICENSE("GPL");
226MODULE_VERSION(DRV_VERSION);
227
228static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
229module_param(debug, int, 0);
230MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
231
232/**
233 * e1000_init_module - Driver Registration Routine
234 *
235 * e1000_init_module is the first routine called when the driver is
236 * loaded. All it does is register with the PCI subsystem.
237 **/
238
239static int __init
240e1000_init_module(void)
241{
242 int ret;
243 printk(KERN_INFO "%s - version %s\n",
244 e1000_driver_string, e1000_driver_version);
245
246 printk(KERN_INFO "%s\n", e1000_copyright);
247
248 ret = pci_module_init(&e1000_driver);
8b378def 249
1da177e4
LT		 250 return ret;
251}
252
253module_init(e1000_init_module);
254
255/**
256 * e1000_exit_module - Driver Exit Cleanup Routine
257 *
258 * e1000_exit_module is called just before the driver is removed
259 * from memory.
260 **/
261
262static void __exit
263e1000_exit_module(void)
264{
1da177e4
LT		 265 pci_unregister_driver(&e1000_driver);
266}
267
268module_exit(e1000_exit_module);
269
2db10a08
AK		 270static int e1000_request_irq(struct e1000_adapter *adapter)
271{
272 struct net_device *netdev = adapter->netdev;
273 int flags, err = 0;
274
c0bc8721 275 flags = IRQF_SHARED;
2db10a08
AK		 276#ifdef CONFIG_PCI_MSI
277 if (adapter->hw.mac_type > e1000_82547_rev_2) {
278 adapter->have_msi = TRUE;
279 if ((err = pci_enable_msi(adapter->pdev))) {
280 DPRINTK(PROBE, ERR,
281 "Unable to allocate MSI interrupt Error: %d\n", err);
282 adapter->have_msi = FALSE;
283 }
284 }
285 if (adapter->have_msi)
61ef5c00 286 flags &= ~IRQF_SHARED;
2db10a08
AK		 287#endif
288 if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
289 netdev->name, netdev)))
290 DPRINTK(PROBE, ERR,
291 "Unable to allocate interrupt Error: %d\n", err);
292
293 return err;
294}
295
296static void e1000_free_irq(struct e1000_adapter *adapter)
297{
298 struct net_device *netdev = adapter->netdev;
299
300 free_irq(adapter->pdev->irq, netdev);
301
302#ifdef CONFIG_PCI_MSI
303 if (adapter->have_msi)
304 pci_disable_msi(adapter->pdev);
305#endif
306}
307
1da177e4
LT		 308/**
309 * e1000_irq_disable - Mask off interrupt generation on the NIC
310 * @adapter: board private structure
311 **/
312
e619d523 313static void
1da177e4
LT		 314e1000_irq_disable(struct e1000_adapter *adapter)
315{
316 atomic_inc(&adapter->irq_sem);
317 E1000_WRITE_REG(&adapter->hw, IMC, ~0);
318 E1000_WRITE_FLUSH(&adapter->hw);
319 synchronize_irq(adapter->pdev->irq);
320}
321
322/**
323 * e1000_irq_enable - Enable default interrupt generation settings
324 * @adapter: board private structure
325 **/
326
e619d523 327static void
1da177e4
LT		 328e1000_irq_enable(struct e1000_adapter *adapter)
329{
96838a40 330 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
1da177e4
LT		 331 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
332 E1000_WRITE_FLUSH(&adapter->hw);
333 }
334}
3ad2cc67
AB		 335
336static void
2d7edb92
MC		 337e1000_update_mng_vlan(struct e1000_adapter *adapter)
338{
339 struct net_device *netdev = adapter->netdev;
340 uint16_t vid = adapter->hw.mng_cookie.vlan_id;
341 uint16_t old_vid = adapter->mng_vlan_id;
96838a40
JB		 342 if (adapter->vlgrp) {
343 if (!adapter->vlgrp->vlan_devices[vid]) {
344 if (adapter->hw.mng_cookie.status &
2d7edb92
MC		 345 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
346 e1000_vlan_rx_add_vid(netdev, vid);
347 adapter->mng_vlan_id = vid;
348 } else
349 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
96838a40
JB		 350
351 if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
352 (vid != old_vid) &&
2d7edb92
MC		 353 !adapter->vlgrp->vlan_devices[old_vid])
354 e1000_vlan_rx_kill_vid(netdev, old_vid);
c5f226fe
JK		 355 } else
356 adapter->mng_vlan_id = vid;
2d7edb92
MC		 357 }
358}
b55ccb35
JK		 359
360/**
361 * e1000_release_hw_control - release control of the h/w to f/w
362 * @adapter: address of board private structure
363 *
364 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
365 * For ASF and Pass Through versions of f/w this means that the
366 * driver is no longer loaded. For AMT version (only with 82573) i
367 * of the f/w this means that the netowrk i/f is closed.
76c224bc 368 *
b55ccb35
JK		 369 **/
370
e619d523 371static void
b55ccb35
JK		 372e1000_release_hw_control(struct e1000_adapter *adapter)
373{
374 uint32_t ctrl_ext;
375 uint32_t swsm;
cd94dd0b 376 uint32_t extcnf;
b55ccb35
JK		 377
378 /* Let firmware taken over control of h/w */
379 switch (adapter->hw.mac_type) {
380 case e1000_82571:
381 case e1000_82572:
4cc15f54 382 case e1000_80003es2lan:
b55ccb35
JK		 383 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
384 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
385 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
386 break;
387 case e1000_82573:
388 swsm = E1000_READ_REG(&adapter->hw, SWSM);
389 E1000_WRITE_REG(&adapter->hw, SWSM,
390 swsm & ~E1000_SWSM_DRV_LOAD);
cd94dd0b
AK		 391 case e1000_ich8lan:
392 extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT);
393 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
394 extcnf & ~E1000_CTRL_EXT_DRV_LOAD);
395 break;
b55ccb35
JK		 396 default:
397 break;
398 }
399}
400
401/**
402 * e1000_get_hw_control - get control of the h/w from f/w
403 * @adapter: address of board private structure
404 *
405 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
76c224bc
AK		 406 * For ASF and Pass Through versions of f/w this means that
407 * the driver is loaded. For AMT version (only with 82573)
b55ccb35 408 * of the f/w this means that the netowrk i/f is open.
76c224bc 409 *
b55ccb35
JK		 410 **/
411
e619d523 412static void
b55ccb35
JK		 413e1000_get_hw_control(struct e1000_adapter *adapter)
414{
415 uint32_t ctrl_ext;
416 uint32_t swsm;
cd94dd0b 417 uint32_t extcnf;
b55ccb35
JK		 418 /* Let firmware know the driver has taken over */
419 switch (adapter->hw.mac_type) {
420 case e1000_82571:
421 case e1000_82572:
4cc15f54 422 case e1000_80003es2lan:
b55ccb35
JK		 423 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
424 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
425 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
426 break;
427 case e1000_82573:
428 swsm = E1000_READ_REG(&adapter->hw, SWSM);
429 E1000_WRITE_REG(&adapter->hw, SWSM,
430 swsm | E1000_SWSM_DRV_LOAD);
431 break;
cd94dd0b
AK		 432 case e1000_ich8lan:
433 extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);
434 E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,
435 extcnf | E1000_EXTCNF_CTRL_SWFLAG);
436 break;
b55ccb35
JK		 437 default:
438 break;
439 }
440}
441
1da177e4
LT		 442int
443e1000_up(struct e1000_adapter *adapter)
444{
445 struct net_device *netdev = adapter->netdev;
2db10a08 446 int i;
1da177e4
LT		 447
448 /* hardware has been reset, we need to reload some things */
449
1da177e4
LT		 450 e1000_set_multi(netdev);
451
452 e1000_restore_vlan(adapter);
453
454 e1000_configure_tx(adapter);
455 e1000_setup_rctl(adapter);
456 e1000_configure_rx(adapter);
72d64a43
JK		 457 /* call E1000_DESC_UNUSED which always leaves
458 * at least 1 descriptor unused to make sure
459 * next_to_use != next_to_clean */
f56799ea 460 for (i = 0; i < adapter->num_rx_queues; i++) {
72d64a43 461 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
a292ca6e
JK		 462 adapter->alloc_rx_buf(adapter, ring,
463 E1000_DESC_UNUSED(ring));
f56799ea 464 }
1da177e4 465
7bfa4816
JK		 466 adapter->tx_queue_len = netdev->tx_queue_len;
467
1da177e4 468 mod_timer(&adapter->watchdog_timer, jiffies);
1da177e4
LT		 469
470#ifdef CONFIG_E1000_NAPI
471 netif_poll_enable(netdev);
472#endif
5de55624
MC		 473 e1000_irq_enable(adapter);
474
1da177e4
LT		 475 return 0;
476}
477
79f05bf0
AK		 478/**
479 * e1000_power_up_phy - restore link in case the phy was powered down
480 * @adapter: address of board private structure
481 *
482 * The phy may be powered down to save power and turn off link when the
483 * driver is unloaded and wake on lan is not enabled (among others)
484 * *** this routine MUST be followed by a call to e1000_reset ***
485 *
486 **/
487
488static void e1000_power_up_phy(struct e1000_adapter *adapter)
489{
490 uint16_t mii_reg = 0;
491
492 /* Just clear the power down bit to wake the phy back up */
493 if (adapter->hw.media_type == e1000_media_type_copper) {
494 /* according to the manual, the phy will retain its
495 * settings across a power-down/up cycle */
496 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
497 mii_reg &= ~MII_CR_POWER_DOWN;
498 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
499 }
500}
501
502static void e1000_power_down_phy(struct e1000_adapter *adapter)
503{
504 boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
505 e1000_check_mng_mode(&adapter->hw);
506 /* Power down the PHY so no link is implied when interface is down
507 * The PHY cannot be powered down if any of the following is TRUE
508 * (a) WoL is enabled
509 * (b) AMT is active
510 * (c) SoL/IDER session is active */
511 if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
cd94dd0b 512 adapter->hw.mac_type != e1000_ich8lan &&
79f05bf0
AK		 513 adapter->hw.media_type == e1000_media_type_copper &&
514 !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
515 !mng_mode_enabled &&
516 !e1000_check_phy_reset_block(&adapter->hw)) {
517 uint16_t mii_reg = 0;
518 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
519 mii_reg |= MII_CR_POWER_DOWN;
520 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
521 mdelay(1);
522 }
523}
524
1da177e4
LT		 525void
526e1000_down(struct e1000_adapter *adapter)
527{
528 struct net_device *netdev = adapter->netdev;
529
530 e1000_irq_disable(adapter);
c1605eb3 531
1da177e4
LT		 532 del_timer_sync(&adapter->tx_fifo_stall_timer);
533 del_timer_sync(&adapter->watchdog_timer);
534 del_timer_sync(&adapter->phy_info_timer);
535
536#ifdef CONFIG_E1000_NAPI
537 netif_poll_disable(netdev);
538#endif
7bfa4816 539 netdev->tx_queue_len = adapter->tx_queue_len;
1da177e4
LT		 540 adapter->link_speed = 0;
541 adapter->link_duplex = 0;
542 netif_carrier_off(netdev);
543 netif_stop_queue(netdev);
544
545 e1000_reset(adapter);
581d708e
MC		 546 e1000_clean_all_tx_rings(adapter);
547 e1000_clean_all_rx_rings(adapter);
1da177e4 548}
1da177e4 549
2db10a08
AK		 550void
551e1000_reinit_locked(struct e1000_adapter *adapter)
552{
553 WARN_ON(in_interrupt());
554 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
555 msleep(1);
556 e1000_down(adapter);
557 e1000_up(adapter);
558 clear_bit(__E1000_RESETTING, &adapter->flags);
1da177e4
LT		 559}
560
561void
562e1000_reset(struct e1000_adapter *adapter)
563{
2d7edb92 564 uint32_t pba, manc;
1125ecbc 565 uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
1da177e4
LT		 566
567 /* Repartition Pba for greater than 9k mtu
568 * To take effect CTRL.RST is required.
569 */
570
2d7edb92
MC		 571 switch (adapter->hw.mac_type) {
572 case e1000_82547:
0e6ef3e0 573 case e1000_82547_rev_2:
2d7edb92
MC		 574 pba = E1000_PBA_30K;
575 break;
868d5309
MC		 576 case e1000_82571:
577 case e1000_82572:
6418ecc6 578 case e1000_80003es2lan:
868d5309
MC		 579 pba = E1000_PBA_38K;
580 break;
2d7edb92
MC		 581 case e1000_82573:
582 pba = E1000_PBA_12K;
583 break;
cd94dd0b
AK		 584 case e1000_ich8lan:
585 pba = E1000_PBA_8K;
586 break;
2d7edb92
MC		 587 default:
588 pba = E1000_PBA_48K;
589 break;
590 }
591
96838a40 592 if ((adapter->hw.mac_type != e1000_82573) &&
f11b7f85 593 (adapter->netdev->mtu > E1000_RXBUFFER_8192))
1125ecbc 594 pba -= 8; /* allocate more FIFO for Tx */
2d7edb92
MC		 595
596
96838a40 597 if (adapter->hw.mac_type == e1000_82547) {
1da177e4
LT		 598 adapter->tx_fifo_head = 0;
599 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
600 adapter->tx_fifo_size =
601 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
602 atomic_set(&adapter->tx_fifo_stall, 0);
603 }
2d7edb92 604
1da177e4
LT		 605 E1000_WRITE_REG(&adapter->hw, PBA, pba);
606
607 /* flow control settings */
f11b7f85
JK		 608 /* Set the FC high water mark to 90% of the FIFO size.
609 * Required to clear last 3 LSB */
610 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
cd94dd0b
AK		 611 /* We can't use 90% on small FIFOs because the remainder
612 * would be less than 1 full frame. In this case, we size
613 * it to allow at least a full frame above the high water
614 * mark. */
615 if (pba < E1000_PBA_16K)
616 fc_high_water_mark = (pba * 1024) - 1600;
f11b7f85
JK		 617
618 adapter->hw.fc_high_water = fc_high_water_mark;
619 adapter->hw.fc_low_water = fc_high_water_mark - 8;
87041639
JK		 620 if (adapter->hw.mac_type == e1000_80003es2lan)
621 adapter->hw.fc_pause_time = 0xFFFF;
622 else
623 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
1da177e4
LT		 624 adapter->hw.fc_send_xon = 1;
625 adapter->hw.fc = adapter->hw.original_fc;
626
2d7edb92 627 /* Allow time for pending master requests to run */
1da177e4 628 e1000_reset_hw(&adapter->hw);
96838a40 629 if (adapter->hw.mac_type >= e1000_82544)
1da177e4 630 E1000_WRITE_REG(&adapter->hw, WUC, 0);
96838a40 631 if (e1000_init_hw(&adapter->hw))
1da177e4 632 DPRINTK(PROBE, ERR, "Hardware Error\n");
2d7edb92 633 e1000_update_mng_vlan(adapter);
1da177e4
LT		 634 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
635 E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
636
637 e1000_reset_adaptive(&adapter->hw);
638 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
9a53a202
AK		 639
640 if (!adapter->smart_power_down &&
641 (adapter->hw.mac_type == e1000_82571 ||
642 adapter->hw.mac_type == e1000_82572)) {
643 uint16_t phy_data = 0;
644 /* speed up time to link by disabling smart power down, ignore
645 * the return value of this function because there is nothing
646 * different we would do if it failed */
647 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
648 &phy_data);
649 phy_data &= ~IGP02E1000_PM_SPD;
650 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
651 phy_data);
652 }
653
cd94dd0b
AK		 654 if (adapter->hw.mac_type < e1000_ich8lan)
655 /* FIXME: this code is duplicate and wrong for PCI Express */
2d7edb92
MC		 656 if (adapter->en_mng_pt) {
657 manc = E1000_READ_REG(&adapter->hw, MANC);
658 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
659 E1000_WRITE_REG(&adapter->hw, MANC, manc);
660 }
1da177e4
LT		 661}
662
663/**
664 * e1000_probe - Device Initialization Routine
665 * @pdev: PCI device information struct
666 * @ent: entry in e1000_pci_tbl
667 *
668 * Returns 0 on success, negative on failure
669 *
670 * e1000_probe initializes an adapter identified by a pci_dev structure.
671 * The OS initialization, configuring of the adapter private structure,
672 * and a hardware reset occur.
673 **/
674
675static int __devinit
676e1000_probe(struct pci_dev *pdev,
677 const struct pci_device_id *ent)
678{
679 struct net_device *netdev;
680 struct e1000_adapter *adapter;
2d7edb92 681 unsigned long mmio_start, mmio_len;
cd94dd0b 682 unsigned long flash_start, flash_len;
2d7edb92 683
1da177e4 684 static int cards_found = 0;
84916829 685 static int e1000_ksp3_port_a = 0; /* global ksp3 port a indication */
2d7edb92 686 int i, err, pci_using_dac;
1da177e4
LT		 687 uint16_t eeprom_data;
688 uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
96838a40 689 if ((err = pci_enable_device(pdev)))
1da177e4
LT		 690 return err;
691
cd94dd0b
AK		 692 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
693 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
1da177e4
LT		 694 pci_using_dac = 1;
695 } else {
cd94dd0b
AK		 696 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
697 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
1da177e4
LT		 698 E1000_ERR("No usable DMA configuration, aborting\n");
699 return err;
700 }
701 pci_using_dac = 0;
702 }
703
96838a40 704 if ((err = pci_request_regions(pdev, e1000_driver_name)))
1da177e4
LT		 705 return err;
706
707 pci_set_master(pdev);
708
709 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
96838a40 710 if (!netdev) {
1da177e4
LT		 711 err = -ENOMEM;
712 goto err_alloc_etherdev;
713 }
714
715 SET_MODULE_OWNER(netdev);
716 SET_NETDEV_DEV(netdev, &pdev->dev);
717
718 pci_set_drvdata(pdev, netdev);
60490fe0 719 adapter = netdev_priv(netdev);
1da177e4
LT		 720 adapter->netdev = netdev;
721 adapter->pdev = pdev;
722 adapter->hw.back = adapter;
723 adapter->msg_enable = (1 << debug) - 1;
724
725 mmio_start = pci_resource_start(pdev, BAR_0);
726 mmio_len = pci_resource_len(pdev, BAR_0);
727
728 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
96838a40 729 if (!adapter->hw.hw_addr) {
1da177e4
LT		 730 err = -EIO;
731 goto err_ioremap;
732 }
733
96838a40
JB		 734 for (i = BAR_1; i <= BAR_5; i++) {
735 if (pci_resource_len(pdev, i) == 0)
1da177e4 736 continue;
96838a40 737 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 738 adapter->hw.io_base = pci_resource_start(pdev, i);
739 break;
740 }
741 }
742
743 netdev->open = &e1000_open;
744 netdev->stop = &e1000_close;
745 netdev->hard_start_xmit = &e1000_xmit_frame;
746 netdev->get_stats = &e1000_get_stats;
747 netdev->set_multicast_list = &e1000_set_multi;
748 netdev->set_mac_address = &e1000_set_mac;
749 netdev->change_mtu = &e1000_change_mtu;
750 netdev->do_ioctl = &e1000_ioctl;
751 e1000_set_ethtool_ops(netdev);
752 netdev->tx_timeout = &e1000_tx_timeout;
753 netdev->watchdog_timeo = 5 * HZ;
754#ifdef CONFIG_E1000_NAPI
755 netdev->poll = &e1000_clean;
756 netdev->weight = 64;
757#endif
758 netdev->vlan_rx_register = e1000_vlan_rx_register;
759 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
760 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
761#ifdef CONFIG_NET_POLL_CONTROLLER
762 netdev->poll_controller = e1000_netpoll;
763#endif
764 strcpy(netdev->name, pci_name(pdev));
765
766 netdev->mem_start = mmio_start;
767 netdev->mem_end = mmio_start + mmio_len;
768 netdev->base_addr = adapter->hw.io_base;
769
770 adapter->bd_number = cards_found;
771
772 /* setup the private structure */
773
96838a40 774 if ((err = e1000_sw_init(adapter)))
1da177e4
LT		 775 goto err_sw_init;
776
cd94dd0b
AK		 777 /* Flash BAR mapping must happen after e1000_sw_init
778 * because it depends on mac_type */
779 if ((adapter->hw.mac_type == e1000_ich8lan) &&
780 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
781 flash_start = pci_resource_start(pdev, 1);
782 flash_len = pci_resource_len(pdev, 1);
783 adapter->hw.flash_address = ioremap(flash_start, flash_len);
784 if (!adapter->hw.flash_address) {
785 err = -EIO;
786 goto err_flashmap;
787 }
788 }
789
96838a40 790 if ((err = e1000_check_phy_reset_block(&adapter->hw)))
2d7edb92
MC		 791 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
792
84916829 793 /* if ksp3, indicate if it's port a being setup */
76c224bc
AK		 794 if (pdev->device == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3 &&
795 e1000_ksp3_port_a == 0)
84916829
JK		 796 adapter->ksp3_port_a = 1;
797 e1000_ksp3_port_a++;
798 /* Reset for multiple KP3 adapters */
799 if (e1000_ksp3_port_a == 4)
800 e1000_ksp3_port_a = 0;
801
96838a40 802 if (adapter->hw.mac_type >= e1000_82543) {
1da177e4
LT		 803 netdev->features = NETIF_F_SG |
804 NETIF_F_HW_CSUM |
805 NETIF_F_HW_VLAN_TX |
806 NETIF_F_HW_VLAN_RX |
807 NETIF_F_HW_VLAN_FILTER;
cd94dd0b
AK		 808 if (adapter->hw.mac_type == e1000_ich8lan)
809 netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1da177e4
LT		 810 }
811
812#ifdef NETIF_F_TSO
96838a40 813 if ((adapter->hw.mac_type >= e1000_82544) &&
1da177e4
LT		 814 (adapter->hw.mac_type != e1000_82547))
815 netdev->features |= NETIF_F_TSO;
2d7edb92
MC		 816
817#ifdef NETIF_F_TSO_IPV6
96838a40 818 if (adapter->hw.mac_type > e1000_82547_rev_2)
2d7edb92
MC		 819 netdev->features |= NETIF_F_TSO_IPV6;
820#endif
1da177e4 821#endif
96838a40 822 if (pci_using_dac)
1da177e4
LT		 823 netdev->features |= NETIF_F_HIGHDMA;
824
76c224bc
AK		 825 netdev->features |= NETIF_F_LLTX;
826
2d7edb92
MC		 827 adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
828
cd94dd0b
AK		 829 /* initialize eeprom parameters */
830
831 if (e1000_init_eeprom_params(&adapter->hw)) {
832 E1000_ERR("EEPROM initialization failed\n");
833 return -EIO;
834 }
835
96838a40 836 /* before reading the EEPROM, reset the controller to
1da177e4 837 * put the device in a known good starting state */
96838a40 838
1da177e4
LT		 839 e1000_reset_hw(&adapter->hw);
840
841 /* make sure the EEPROM is good */
842
96838a40 843 if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
1da177e4
LT		 844 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
845 err = -EIO;
846 goto err_eeprom;
847 }
848
849 /* copy the MAC address out of the EEPROM */
850
96838a40 851 if (e1000_read_mac_addr(&adapter->hw))
1da177e4
LT		 852 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
853 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
9beb0ac1 854 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
1da177e4 855
96838a40 856 if (!is_valid_ether_addr(netdev->perm_addr)) {
1da177e4
LT		 857 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
858 err = -EIO;
859 goto err_eeprom;
860 }
861
862 e1000_read_part_num(&adapter->hw, &(adapter->part_num));
863
864 e1000_get_bus_info(&adapter->hw);
865
866 init_timer(&adapter->tx_fifo_stall_timer);
867 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
868 adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
869
870 init_timer(&adapter->watchdog_timer);
871 adapter->watchdog_timer.function = &e1000_watchdog;
872 adapter->watchdog_timer.data = (unsigned long) adapter;
873
1da177e4
LT		 874 init_timer(&adapter->phy_info_timer);
875 adapter->phy_info_timer.function = &e1000_update_phy_info;
876 adapter->phy_info_timer.data = (unsigned long) adapter;
877
87041639
JK		 878 INIT_WORK(&adapter->reset_task,
879 (void (*)(void *))e1000_reset_task, netdev);
1da177e4
LT		 880
881 /* we're going to reset, so assume we have no link for now */
882
883 netif_carrier_off(netdev);
884 netif_stop_queue(netdev);
885
886 e1000_check_options(adapter);
887
888 /* Initial Wake on LAN setting
889 * If APM wake is enabled in the EEPROM,
890 * enable the ACPI Magic Packet filter
891 */
892
96838a40 893 switch (adapter->hw.mac_type) {
1da177e4
LT		 894 case e1000_82542_rev2_0:
895 case e1000_82542_rev2_1:
896 case e1000_82543:
897 break;
898 case e1000_82544:
899 e1000_read_eeprom(&adapter->hw,
900 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
901 eeprom_apme_mask = E1000_EEPROM_82544_APM;
902 break;
cd94dd0b
AK		 903 case e1000_ich8lan:
904 e1000_read_eeprom(&adapter->hw,
905 EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
906 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
907 break;
1da177e4
LT		 908 case e1000_82546:
909 case e1000_82546_rev_3:
fd803241 910 case e1000_82571:
6418ecc6 911 case e1000_80003es2lan:
96838a40 912 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1da177e4
LT		 913 e1000_read_eeprom(&adapter->hw,
914 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
915 break;
916 }
917 /* Fall Through */
918 default:
919 e1000_read_eeprom(&adapter->hw,
920 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
921 break;
922 }
96838a40 923 if (eeprom_data & eeprom_apme_mask)
1da177e4
LT		 924 adapter->wol |= E1000_WUFC_MAG;
925
fb3d47d4
JK		 926 /* print bus type/speed/width info */
927 {
928 struct e1000_hw *hw = &adapter->hw;
929 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
930 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
931 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
932 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
933 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
934 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
935 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
936 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
937 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
938 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
939 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
940 "32-bit"));
941 }
942
943 for (i = 0; i < 6; i++)
944 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
945
1da177e4
LT		 946 /* reset the hardware with the new settings */
947 e1000_reset(adapter);
948
b55ccb35
JK		 949 /* If the controller is 82573 and f/w is AMT, do not set
950 * DRV_LOAD until the interface is up. For all other cases,
951 * let the f/w know that the h/w is now under the control
952 * of the driver. */
953 if (adapter->hw.mac_type != e1000_82573 ||
954 !e1000_check_mng_mode(&adapter->hw))
955 e1000_get_hw_control(adapter);
2d7edb92 956
1da177e4 957 strcpy(netdev->name, "eth%d");
96838a40 958 if ((err = register_netdev(netdev)))
1da177e4
LT		 959 goto err_register;
960
961 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
962
963 cards_found++;
964 return 0;
965
966err_register:
cd94dd0b
AK		 967 if (adapter->hw.flash_address)
968 iounmap(adapter->hw.flash_address);
969err_flashmap:
1da177e4
LT		 970err_sw_init:
971err_eeprom:
972 iounmap(adapter->hw.hw_addr);
973err_ioremap:
974 free_netdev(netdev);
975err_alloc_etherdev:
976 pci_release_regions(pdev);
977 return err;
978}
979
980/**
981 * e1000_remove - Device Removal Routine
982 * @pdev: PCI device information struct
983 *
984 * e1000_remove is called by the PCI subsystem to alert the driver
985 * that it should release a PCI device. The could be caused by a
986 * Hot-Plug event, or because the driver is going to be removed from
987 * memory.
988 **/
989
990static void __devexit
991e1000_remove(struct pci_dev *pdev)
992{
993 struct net_device *netdev = pci_get_drvdata(pdev);
60490fe0 994 struct e1000_adapter *adapter = netdev_priv(netdev);
b55ccb35 995 uint32_t manc;
581d708e
MC		 996#ifdef CONFIG_E1000_NAPI
997 int i;
998#endif
1da177e4 999
be2b28ed
JG		 1000 flush_scheduled_work();
1001
96838a40 1002 if (adapter->hw.mac_type >= e1000_82540 &&
cd94dd0b 1003 adapter->hw.mac_type != e1000_ich8lan &&
1da177e4
LT		 1004 adapter->hw.media_type == e1000_media_type_copper) {
1005 manc = E1000_READ_REG(&adapter->hw, MANC);
96838a40 1006 if (manc & E1000_MANC_SMBUS_EN) {
1da177e4
LT		 1007 manc |= E1000_MANC_ARP_EN;
1008 E1000_WRITE_REG(&adapter->hw, MANC, manc);
1009 }
1010 }
1011
b55ccb35
JK		 1012 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1013 * would have already happened in close and is redundant. */
1014 e1000_release_hw_control(adapter);
2d7edb92 1015
1da177e4 1016 unregister_netdev(netdev);
581d708e 1017#ifdef CONFIG_E1000_NAPI
f56799ea 1018 for (i = 0; i < adapter->num_rx_queues; i++)
15333061 1019 dev_put(&adapter->polling_netdev[i]);
581d708e 1020#endif
1da177e4 1021
96838a40 1022 if (!e1000_check_phy_reset_block(&adapter->hw))
2d7edb92 1023 e1000_phy_hw_reset(&adapter->hw);
1da177e4 1024
24025e4e
MC		 1025 kfree(adapter->tx_ring);
1026 kfree(adapter->rx_ring);
1027#ifdef CONFIG_E1000_NAPI
1028 kfree(adapter->polling_netdev);
1029#endif
1030
1da177e4 1031 iounmap(adapter->hw.hw_addr);
cd94dd0b
AK		 1032 if (adapter->hw.flash_address)
1033 iounmap(adapter->hw.flash_address);
1da177e4
LT		 1034 pci_release_regions(pdev);
1035
1036 free_netdev(netdev);
1037
1038 pci_disable_device(pdev);
1039}
1040
1041/**
1042 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1043 * @adapter: board private structure to initialize
1044 *
1045 * e1000_sw_init initializes the Adapter private data structure.
1046 * Fields are initialized based on PCI device information and
1047 * OS network device settings (MTU size).
1048 **/
1049
1050static int __devinit
1051e1000_sw_init(struct e1000_adapter *adapter)
1052{
1053 struct e1000_hw *hw = &adapter->hw;
1054 struct net_device *netdev = adapter->netdev;
1055 struct pci_dev *pdev = adapter->pdev;
581d708e
MC		 1056#ifdef CONFIG_E1000_NAPI
1057 int i;
1058#endif
1da177e4
LT		 1059
1060 /* PCI config space info */
1061
1062 hw->vendor_id = pdev->vendor;
1063 hw->device_id = pdev->device;
1064 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1065 hw->subsystem_id = pdev->subsystem_device;
1066
1067 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1068
1069 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1070
9e2feace
AK		 1071 adapter->rx_buffer_len = MAXIMUM_ETHERNET_FRAME_SIZE;
1072 adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1da177e4
LT		 1073 hw->max_frame_size = netdev->mtu +
1074 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1075 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1076
1077 /* identify the MAC */
1078
96838a40 1079 if (e1000_set_mac_type(hw)) {
1da177e4
LT		 1080 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1081 return -EIO;
1082 }
1083
96838a40 1084 switch (hw->mac_type) {
1da177e4
LT		 1085 default:
1086 break;
1087 case e1000_82541:
1088 case e1000_82547:
1089 case e1000_82541_rev_2:
1090 case e1000_82547_rev_2:
1091 hw->phy_init_script = 1;
1092 break;
1093 }
1094
1095 e1000_set_media_type(hw);
1096
1097 hw->wait_autoneg_complete = FALSE;
1098 hw->tbi_compatibility_en = TRUE;
1099 hw->adaptive_ifs = TRUE;
1100
1101 /* Copper options */
1102
96838a40 1103 if (hw->media_type == e1000_media_type_copper) {
1da177e4
LT		 1104 hw->mdix = AUTO_ALL_MODES;
1105 hw->disable_polarity_correction = FALSE;
1106 hw->master_slave = E1000_MASTER_SLAVE;
1107 }
1108
f56799ea
JK		 1109 adapter->num_tx_queues = 1;
1110 adapter->num_rx_queues = 1;
581d708e
MC		 1111
1112 if (e1000_alloc_queues(adapter)) {
1113 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1114 return -ENOMEM;
1115 }
1116
1117#ifdef CONFIG_E1000_NAPI
f56799ea 1118 for (i = 0; i < adapter->num_rx_queues; i++) {
581d708e
MC		 1119 adapter->polling_netdev[i].priv = adapter;
1120 adapter->polling_netdev[i].poll = &e1000_clean;
1121 adapter->polling_netdev[i].weight = 64;
1122 dev_hold(&adapter->polling_netdev[i]);
1123 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1124 }
7bfa4816 1125 spin_lock_init(&adapter->tx_queue_lock);
24025e4e
MC		 1126#endif
1127
1da177e4
LT		 1128 atomic_set(&adapter->irq_sem, 1);
1129 spin_lock_init(&adapter->stats_lock);
1da177e4
LT		 1130
1131 return 0;
1132}
1133
581d708e
MC		 1134/**
1135 * e1000_alloc_queues - Allocate memory for all rings
1136 * @adapter: board private structure to initialize
1137 *
1138 * We allocate one ring per queue at run-time since we don't know the
1139 * number of queues at compile-time. The polling_netdev array is
1140 * intended for Multiqueue, but should work fine with a single queue.
1141 **/
1142
1143static int __devinit
1144e1000_alloc_queues(struct e1000_adapter *adapter)
1145{
1146 int size;
1147
f56799ea 1148 size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
581d708e
MC		 1149 adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1150 if (!adapter->tx_ring)
1151 return -ENOMEM;
1152 memset(adapter->tx_ring, 0, size);
1153
f56799ea 1154 size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
581d708e
MC		 1155 adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1156 if (!adapter->rx_ring) {
1157 kfree(adapter->tx_ring);
1158 return -ENOMEM;
1159 }
1160 memset(adapter->rx_ring, 0, size);
1161
1162#ifdef CONFIG_E1000_NAPI
f56799ea 1163 size = sizeof(struct net_device) * adapter->num_rx_queues;
581d708e
MC		 1164 adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1165 if (!adapter->polling_netdev) {
1166 kfree(adapter->tx_ring);
1167 kfree(adapter->rx_ring);
1168 return -ENOMEM;
1169 }
1170 memset(adapter->polling_netdev, 0, size);
1171#endif
1172
1173 return E1000_SUCCESS;
1174}
1175
1da177e4
LT		 1176/**
1177 * e1000_open - Called when a network interface is made active
1178 * @netdev: network interface device structure
1179 *
1180 * Returns 0 on success, negative value on failure
1181 *
1182 * The open entry point is called when a network interface is made
1183 * active by the system (IFF_UP). At this point all resources needed
1184 * for transmit and receive operations are allocated, the interrupt
1185 * handler is registered with the OS, the watchdog timer is started,
1186 * and the stack is notified that the interface is ready.
1187 **/
1188
1189static int
1190e1000_open(struct net_device *netdev)
1191{
60490fe0 1192 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1193 int err;
1194
2db10a08
AK		 1195 /* disallow open during test */
1196 if (test_bit(__E1000_DRIVER_TESTING, &adapter->flags))
1197 return -EBUSY;
1198
1da177e4
LT		 1199 /* allocate transmit descriptors */
1200
581d708e 1201 if ((err = e1000_setup_all_tx_resources(adapter)))
1da177e4
LT		 1202 goto err_setup_tx;
1203
1204 /* allocate receive descriptors */
1205
581d708e 1206 if ((err = e1000_setup_all_rx_resources(adapter)))
1da177e4
LT		 1207 goto err_setup_rx;
1208
2db10a08
AK		 1209 err = e1000_request_irq(adapter);
1210 if (err)
1211 goto err_up;
1212
79f05bf0
AK		 1213 e1000_power_up_phy(adapter);
1214
96838a40 1215 if ((err = e1000_up(adapter)))
1da177e4 1216 goto err_up;
2d7edb92 1217 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
96838a40 1218 if ((adapter->hw.mng_cookie.status &
2d7edb92
MC		 1219 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1220 e1000_update_mng_vlan(adapter);
1221 }
1da177e4 1222
b55ccb35
JK		 1223 /* If AMT is enabled, let the firmware know that the network
1224 * interface is now open */
1225 if (adapter->hw.mac_type == e1000_82573 &&
1226 e1000_check_mng_mode(&adapter->hw))
1227 e1000_get_hw_control(adapter);
1228
1da177e4
LT		 1229 return E1000_SUCCESS;
1230
1231err_up:
581d708e 1232 e1000_free_all_rx_resources(adapter);
1da177e4 1233err_setup_rx:
581d708e 1234 e1000_free_all_tx_resources(adapter);
1da177e4
LT		 1235err_setup_tx:
1236 e1000_reset(adapter);
1237
1238 return err;
1239}
1240
1241/**
1242 * e1000_close - Disables a network interface
1243 * @netdev: network interface device structure
1244 *
1245 * Returns 0, this is not allowed to fail
1246 *
1247 * The close entry point is called when an interface is de-activated
1248 * by the OS. The hardware is still under the drivers control, but
1249 * needs to be disabled. A global MAC reset is issued to stop the
1250 * hardware, and all transmit and receive resources are freed.
1251 **/
1252
1253static int
1254e1000_close(struct net_device *netdev)
1255{
60490fe0 1256 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 1257
2db10a08 1258 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1da177e4 1259 e1000_down(adapter);
79f05bf0 1260 e1000_power_down_phy(adapter);
2db10a08 1261 e1000_free_irq(adapter);
1da177e4 1262
581d708e
MC		 1263 e1000_free_all_tx_resources(adapter);
1264 e1000_free_all_rx_resources(adapter);
1da177e4 1265
96838a40 1266 if ((adapter->hw.mng_cookie.status &
2d7edb92
MC		 1267 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1268 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1269 }
b55ccb35
JK		 1270
1271 /* If AMT is enabled, let the firmware know that the network
1272 * interface is now closed */
1273 if (adapter->hw.mac_type == e1000_82573 &&
1274 e1000_check_mng_mode(&adapter->hw))
1275 e1000_release_hw_control(adapter);
1276
1da177e4
LT		 1277 return 0;
1278}
1279
1280/**
1281 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1282 * @adapter: address of board private structure
2d7edb92
MC		 1283 * @start: address of beginning of memory
1284 * @len: length of memory
1da177e4 1285 **/
e619d523 1286static boolean_t
1da177e4
LT		 1287e1000_check_64k_bound(struct e1000_adapter *adapter,
1288 void *start, unsigned long len)
1289{
1290 unsigned long begin = (unsigned long) start;
1291 unsigned long end = begin + len;
1292
2648345f
MC		 1293 /* First rev 82545 and 82546 need to not allow any memory
1294 * write location to cross 64k boundary due to errata 23 */
1da177e4 1295 if (adapter->hw.mac_type == e1000_82545 ||
2648345f 1296 adapter->hw.mac_type == e1000_82546) {
1da177e4
LT		 1297 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1298 }
1299
1300 return TRUE;
1301}
1302
1303/**
1304 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1305 * @adapter: board private structure
581d708e 1306 * @txdr: tx descriptor ring (for a specific queue) to setup
1da177e4
LT		 1307 *
1308 * Return 0 on success, negative on failure
1309 **/
1310
3ad2cc67 1311static int
581d708e
MC		 1312e1000_setup_tx_resources(struct e1000_adapter *adapter,
1313 struct e1000_tx_ring *txdr)
1da177e4 1314{
1da177e4
LT		 1315 struct pci_dev *pdev = adapter->pdev;
1316 int size;
1317
1318 size = sizeof(struct e1000_buffer) * txdr->count;
cd94dd0b 1319 txdr->buffer_info = vmalloc(size);
96838a40 1320 if (!txdr->buffer_info) {
2648345f
MC		 1321 DPRINTK(PROBE, ERR,
1322 "Unable to allocate memory for the transmit descriptor ring\n");
1da177e4
LT		 1323 return -ENOMEM;
1324 }
1325 memset(txdr->buffer_info, 0, size);
1326
1327 /* round up to nearest 4K */
1328
1329 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1330 E1000_ROUNDUP(txdr->size, 4096);
1331
1332 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
96838a40 1333 if (!txdr->desc) {
1da177e4 1334setup_tx_desc_die:
1da177e4 1335 vfree(txdr->buffer_info);
2648345f
MC		 1336 DPRINTK(PROBE, ERR,
1337 "Unable to allocate memory for the transmit descriptor ring\n");
1da177e4
LT		 1338 return -ENOMEM;
1339 }
1340
2648345f 1341 /* Fix for errata 23, can't cross 64kB boundary */
1da177e4
LT		 1342 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1343 void *olddesc = txdr->desc;
1344 dma_addr_t olddma = txdr->dma;
2648345f
MC		 1345 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1346 "at %p\n", txdr->size, txdr->desc);
1347 /* Try again, without freeing the previous */
1da177e4 1348 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
2648345f 1349 /* Failed allocation, critical failure */
96838a40 1350 if (!txdr->desc) {
1da177e4
LT		 1351 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1352 goto setup_tx_desc_die;
1353 }
1354
1355 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1356 /* give up */
2648345f
MC		 1357 pci_free_consistent(pdev, txdr->size, txdr->desc,
1358 txdr->dma);
1da177e4
LT		 1359 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1360 DPRINTK(PROBE, ERR,
2648345f
MC		 1361 "Unable to allocate aligned memory "
1362 "for the transmit descriptor ring\n");
1da177e4
LT		 1363 vfree(txdr->buffer_info);
1364 return -ENOMEM;
1365 } else {
2648345f 1366 /* Free old allocation, new allocation was successful */
1da177e4
LT		 1367 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1368 }
1369 }
1370 memset(txdr->desc, 0, txdr->size);
1371
1372 txdr->next_to_use = 0;
1373 txdr->next_to_clean = 0;
2ae76d98 1374 spin_lock_init(&txdr->tx_lock);
1da177e4
LT		 1375
1376 return 0;
1377}
1378
581d708e
MC		 1379/**
1380 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1381 * (Descriptors) for all queues
1382 * @adapter: board private structure
1383 *
1384 * If this function returns with an error, then it's possible one or
1385 * more of the rings is populated (while the rest are not). It is the
1386 * callers duty to clean those orphaned rings.
1387 *
1388 * Return 0 on success, negative on failure
1389 **/
1390
1391int
1392e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1393{
1394 int i, err = 0;
1395
f56799ea 1396 for (i = 0; i < adapter->num_tx_queues; i++) {
581d708e
MC		 1397 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1398 if (err) {
1399 DPRINTK(PROBE, ERR,
1400 "Allocation for Tx Queue %u failed\n", i);
1401 break;
1402 }
1403 }
1404
1405 return err;
1406}
1407
1da177e4
LT		 1408/**
1409 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1410 * @adapter: board private structure
1411 *
1412 * Configure the Tx unit of the MAC after a reset.
1413 **/
1414
1415static void
1416e1000_configure_tx(struct e1000_adapter *adapter)
1417{
581d708e
MC		 1418 uint64_t tdba;
1419 struct e1000_hw *hw = &adapter->hw;
1420 uint32_t tdlen, tctl, tipg, tarc;
0fadb059 1421 uint32_t ipgr1, ipgr2;
1da177e4
LT		 1422
1423 /* Setup the HW Tx Head and Tail descriptor pointers */
1424
f56799ea 1425 switch (adapter->num_tx_queues) {
24025e4e
MC		 1426 case 1:
1427 default:
581d708e
MC		 1428 tdba = adapter->tx_ring[0].dma;
1429 tdlen = adapter->tx_ring[0].count *
1430 sizeof(struct e1000_tx_desc);
581d708e 1431 E1000_WRITE_REG(hw, TDLEN, tdlen);
4ca213a6
AK		 1432 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1433 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
581d708e 1434 E1000_WRITE_REG(hw, TDT, 0);
4ca213a6 1435 E1000_WRITE_REG(hw, TDH, 0);
581d708e
MC		 1436 adapter->tx_ring[0].tdh = E1000_TDH;
1437 adapter->tx_ring[0].tdt = E1000_TDT;
24025e4e
MC		 1438 break;
1439 }
1da177e4
LT		 1440
1441 /* Set the default values for the Tx Inter Packet Gap timer */
1442
0fadb059
JK		 1443 if (hw->media_type == e1000_media_type_fiber ||
1444 hw->media_type == e1000_media_type_internal_serdes)
1445 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1446 else
1447 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1448
581d708e 1449 switch (hw->mac_type) {
1da177e4
LT		 1450 case e1000_82542_rev2_0:
1451 case e1000_82542_rev2_1:
1452 tipg = DEFAULT_82542_TIPG_IPGT;
0fadb059
JK		 1453 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1454 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1da177e4 1455 break;
87041639
JK		 1456 case e1000_80003es2lan:
1457 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1458 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1459 break;
1da177e4 1460 default:
0fadb059
JK		 1461 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1462 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1463 break;
1da177e4 1464 }
0fadb059
JK		 1465 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1466 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
581d708e 1467 E1000_WRITE_REG(hw, TIPG, tipg);
1da177e4
LT		 1468
1469 /* Set the Tx Interrupt Delay register */
1470
581d708e
MC		 1471 E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1472 if (hw->mac_type >= e1000_82540)
1473 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1da177e4
LT		 1474
1475 /* Program the Transmit Control Register */
1476
581d708e 1477 tctl = E1000_READ_REG(hw, TCTL);
1da177e4
LT		 1478
1479 tctl &= ~E1000_TCTL_CT;
7e6c9861 1480 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1da177e4
LT		 1481 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1482
7e6c9861
JK		 1483#ifdef DISABLE_MULR
1484 /* disable Multiple Reads for debugging */
1485 tctl &= ~E1000_TCTL_MULR;
1486#endif
1da177e4 1487
2ae76d98
MC		 1488 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1489 tarc = E1000_READ_REG(hw, TARC0);
1490 tarc |= ((1 << 25) | (1 << 21));
1491 E1000_WRITE_REG(hw, TARC0, tarc);
1492 tarc = E1000_READ_REG(hw, TARC1);
1493 tarc |= (1 << 25);
1494 if (tctl & E1000_TCTL_MULR)
1495 tarc &= ~(1 << 28);
1496 else
1497 tarc |= (1 << 28);
1498 E1000_WRITE_REG(hw, TARC1, tarc);
87041639
JK		 1499 } else if (hw->mac_type == e1000_80003es2lan) {
1500 tarc = E1000_READ_REG(hw, TARC0);
1501 tarc |= 1;
1502 if (hw->media_type == e1000_media_type_internal_serdes)
1503 tarc |= (1 << 20);
1504 E1000_WRITE_REG(hw, TARC0, tarc);
1505 tarc = E1000_READ_REG(hw, TARC1);
1506 tarc |= 1;
1507 E1000_WRITE_REG(hw, TARC1, tarc);
2ae76d98
MC		 1508 }
1509
581d708e 1510 e1000_config_collision_dist(hw);
1da177e4
LT		 1511
1512 /* Setup Transmit Descriptor Settings for eop descriptor */
1513 adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1514 E1000_TXD_CMD_IFCS;
1515
581d708e 1516 if (hw->mac_type < e1000_82543)
1da177e4
LT		 1517 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1518 else
1519 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1520
1521 /* Cache if we're 82544 running in PCI-X because we'll
1522 * need this to apply a workaround later in the send path. */
581d708e
MC		 1523 if (hw->mac_type == e1000_82544 &&
1524 hw->bus_type == e1000_bus_type_pcix)
1da177e4 1525 adapter->pcix_82544 = 1;
7e6c9861
JK		 1526
1527 E1000_WRITE_REG(hw, TCTL, tctl);
1528
1da177e4
LT		 1529}
1530
1531/**
1532 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1533 * @adapter: board private structure
581d708e 1534 * @rxdr: rx descriptor ring (for a specific queue) to setup
1da177e4
LT		 1535 *
1536 * Returns 0 on success, negative on failure
1537 **/
1538
3ad2cc67 1539static int
581d708e
MC		 1540e1000_setup_rx_resources(struct e1000_adapter *adapter,
1541 struct e1000_rx_ring *rxdr)
1da177e4 1542{
1da177e4 1543 struct pci_dev *pdev = adapter->pdev;
2d7edb92 1544 int size, desc_len;
1da177e4
LT		 1545
1546 size = sizeof(struct e1000_buffer) * rxdr->count;
cd94dd0b 1547 rxdr->buffer_info = vmalloc(size);
581d708e 1548 if (!rxdr->buffer_info) {
2648345f
MC		 1549 DPRINTK(PROBE, ERR,
1550 "Unable to allocate memory for the receive descriptor ring\n");
1da177e4
LT		 1551 return -ENOMEM;
1552 }
1553 memset(rxdr->buffer_info, 0, size);
1554
2d7edb92
MC		 1555 size = sizeof(struct e1000_ps_page) * rxdr->count;
1556 rxdr->ps_page = kmalloc(size, GFP_KERNEL);
96838a40 1557 if (!rxdr->ps_page) {
2d7edb92
MC		 1558 vfree(rxdr->buffer_info);
1559 DPRINTK(PROBE, ERR,
1560 "Unable to allocate memory for the receive descriptor ring\n");
1561 return -ENOMEM;
1562 }
1563 memset(rxdr->ps_page, 0, size);
1564
1565 size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1566 rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
96838a40 1567 if (!rxdr->ps_page_dma) {
2d7edb92
MC		 1568 vfree(rxdr->buffer_info);
1569 kfree(rxdr->ps_page);
1570 DPRINTK(PROBE, ERR,
1571 "Unable to allocate memory for the receive descriptor ring\n");
1572 return -ENOMEM;
1573 }
1574 memset(rxdr->ps_page_dma, 0, size);
1575
96838a40 1576 if (adapter->hw.mac_type <= e1000_82547_rev_2)
2d7edb92
MC		 1577 desc_len = sizeof(struct e1000_rx_desc);
1578 else
1579 desc_len = sizeof(union e1000_rx_desc_packet_split);
1580
1da177e4
LT		 1581 /* Round up to nearest 4K */
1582
2d7edb92 1583 rxdr->size = rxdr->count * desc_len;
1da177e4
LT		 1584 E1000_ROUNDUP(rxdr->size, 4096);
1585
1586 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1587
581d708e
MC		 1588 if (!rxdr->desc) {
1589 DPRINTK(PROBE, ERR,
1590 "Unable to allocate memory for the receive descriptor ring\n");
1da177e4 1591setup_rx_desc_die:
1da177e4 1592 vfree(rxdr->buffer_info);
2d7edb92
MC		 1593 kfree(rxdr->ps_page);
1594 kfree(rxdr->ps_page_dma);
1da177e4
LT		 1595 return -ENOMEM;
1596 }
1597
2648345f 1598 /* Fix for errata 23, can't cross 64kB boundary */
1da177e4
LT		 1599 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1600 void *olddesc = rxdr->desc;
1601 dma_addr_t olddma = rxdr->dma;
2648345f
MC		 1602 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1603 "at %p\n", rxdr->size, rxdr->desc);
1604 /* Try again, without freeing the previous */
1da177e4 1605 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
2648345f 1606 /* Failed allocation, critical failure */
581d708e 1607 if (!rxdr->desc) {
1da177e4 1608 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
581d708e
MC		 1609 DPRINTK(PROBE, ERR,
1610 "Unable to allocate memory "
1611 "for the receive descriptor ring\n");
1da177e4
LT		 1612 goto setup_rx_desc_die;
1613 }
1614
1615 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1616 /* give up */
2648345f
MC		 1617 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1618 rxdr->dma);
1da177e4 1619 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
2648345f
MC		 1620 DPRINTK(PROBE, ERR,
1621 "Unable to allocate aligned memory "
1622 "for the receive descriptor ring\n");
581d708e 1623 goto setup_rx_desc_die;
1da177e4 1624 } else {
2648345f 1625 /* Free old allocation, new allocation was successful */
1da177e4
LT		 1626 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1627 }
1628 }
1629 memset(rxdr->desc, 0, rxdr->size);
1630
1631 rxdr->next_to_clean = 0;
1632 rxdr->next_to_use = 0;
1633
1634 return 0;
1635}
1636
581d708e
MC		 1637/**
1638 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1639 * (Descriptors) for all queues
1640 * @adapter: board private structure
1641 *
1642 * If this function returns with an error, then it's possible one or
1643 * more of the rings is populated (while the rest are not). It is the
1644 * callers duty to clean those orphaned rings.
1645 *
1646 * Return 0 on success, negative on failure
1647 **/
1648
1649int
1650e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1651{
1652 int i, err = 0;
1653
f56799ea 1654 for (i = 0; i < adapter->num_rx_queues; i++) {
581d708e
MC		 1655 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1656 if (err) {
1657 DPRINTK(PROBE, ERR,
1658 "Allocation for Rx Queue %u failed\n", i);
1659 break;
1660 }
1661 }
1662
1663 return err;
1664}
1665
1da177e4 1666/**
2648345f 1667 * e1000_setup_rctl - configure the receive control registers
1da177e4
LT		 1668 * @adapter: Board private structure
1669 **/
e4c811c9
MC		 1670#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1671 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1da177e4
LT		 1672static void
1673e1000_setup_rctl(struct e1000_adapter *adapter)
1674{
2d7edb92
MC		 1675 uint32_t rctl, rfctl;
1676 uint32_t psrctl = 0;
35ec56bb 1677#ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
e4c811c9
MC		 1678 uint32_t pages = 0;
1679#endif
1da177e4
LT		 1680
1681 rctl = E1000_READ_REG(&adapter->hw, RCTL);
1682
1683 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1684
1685 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1686 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1687 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1688
0fadb059 1689 if (adapter->hw.tbi_compatibility_on == 1)
1da177e4
LT		 1690 rctl |= E1000_RCTL_SBP;
1691 else
1692 rctl &= ~E1000_RCTL_SBP;
1693
2d7edb92
MC		 1694 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1695 rctl &= ~E1000_RCTL_LPE;
1696 else
1697 rctl |= E1000_RCTL_LPE;
1698
1da177e4 1699 /* Setup buffer sizes */
9e2feace
AK		 1700 rctl &= ~E1000_RCTL_SZ_4096;
1701 rctl |= E1000_RCTL_BSEX;
1702 switch (adapter->rx_buffer_len) {
1703 case E1000_RXBUFFER_256:
1704 rctl |= E1000_RCTL_SZ_256;
1705 rctl &= ~E1000_RCTL_BSEX;
1706 break;
1707 case E1000_RXBUFFER_512:
1708 rctl |= E1000_RCTL_SZ_512;
1709 rctl &= ~E1000_RCTL_BSEX;
1710 break;
1711 case E1000_RXBUFFER_1024:
1712 rctl |= E1000_RCTL_SZ_1024;
1713 rctl &= ~E1000_RCTL_BSEX;
1714 break;
a1415ee6
JK		 1715 case E1000_RXBUFFER_2048:
1716 default:
1717 rctl |= E1000_RCTL_SZ_2048;
1718 rctl &= ~E1000_RCTL_BSEX;
1719 break;
1720 case E1000_RXBUFFER_4096:
1721 rctl |= E1000_RCTL_SZ_4096;
1722 break;
1723 case E1000_RXBUFFER_8192:
1724 rctl |= E1000_RCTL_SZ_8192;
1725 break;
1726 case E1000_RXBUFFER_16384:
1727 rctl |= E1000_RCTL_SZ_16384;
1728 break;
2d7edb92
MC		 1729 }
1730
35ec56bb 1731#ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
2d7edb92
MC		 1732 /* 82571 and greater support packet-split where the protocol
1733 * header is placed in skb->data and the packet data is
1734 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1735 * In the case of a non-split, skb->data is linearly filled,
1736 * followed by the page buffers. Therefore, skb->data is
1737 * sized to hold the largest protocol header.
1738 */
e4c811c9
MC		 1739 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1740 if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1741 PAGE_SIZE <= 16384)
1742 adapter->rx_ps_pages = pages;
1743 else
1744 adapter->rx_ps_pages = 0;
2d7edb92 1745#endif
e4c811c9 1746 if (adapter->rx_ps_pages) {
2d7edb92
MC		 1747 /* Configure extra packet-split registers */
1748 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1749 rfctl |= E1000_RFCTL_EXTEN;
1750 /* disable IPv6 packet split support */
1751 rfctl |= E1000_RFCTL_IPV6_DIS;
1752 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1753
7dfee0cb 1754 rctl |= E1000_RCTL_DTYP_PS;
96838a40 1755
2d7edb92
MC		 1756 psrctl |= adapter->rx_ps_bsize0 >>
1757 E1000_PSRCTL_BSIZE0_SHIFT;
e4c811c9
MC		 1758
1759 switch (adapter->rx_ps_pages) {
1760 case 3:
1761 psrctl |= PAGE_SIZE <<
1762 E1000_PSRCTL_BSIZE3_SHIFT;
1763 case 2:
1764 psrctl |= PAGE_SIZE <<
1765 E1000_PSRCTL_BSIZE2_SHIFT;
1766 case 1:
1767 psrctl |= PAGE_SIZE >>
1768 E1000_PSRCTL_BSIZE1_SHIFT;
1769 break;
1770 }
2d7edb92
MC		 1771
1772 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1da177e4
LT		 1773 }
1774
1775 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1776}
1777
1778/**
1779 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1780 * @adapter: board private structure
1781 *
1782 * Configure the Rx unit of the MAC after a reset.
1783 **/
1784
1785static void
1786e1000_configure_rx(struct e1000_adapter *adapter)
1787{
581d708e
MC		 1788 uint64_t rdba;
1789 struct e1000_hw *hw = &adapter->hw;
1790 uint32_t rdlen, rctl, rxcsum, ctrl_ext;
2d7edb92 1791
e4c811c9 1792 if (adapter->rx_ps_pages) {
0f15a8fa 1793 /* this is a 32 byte descriptor */
581d708e 1794 rdlen = adapter->rx_ring[0].count *
2d7edb92
MC		 1795 sizeof(union e1000_rx_desc_packet_split);
1796 adapter->clean_rx = e1000_clean_rx_irq_ps;
1797 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1798 } else {
581d708e
MC		 1799 rdlen = adapter->rx_ring[0].count *
1800 sizeof(struct e1000_rx_desc);
2d7edb92
MC		 1801 adapter->clean_rx = e1000_clean_rx_irq;
1802 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1803 }
1da177e4
LT		 1804
1805 /* disable receives while setting up the descriptors */
581d708e
MC		 1806 rctl = E1000_READ_REG(hw, RCTL);
1807 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1da177e4
LT		 1808
1809 /* set the Receive Delay Timer Register */
581d708e 1810 E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1da177e4 1811
581d708e
MC		 1812 if (hw->mac_type >= e1000_82540) {
1813 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
96838a40 1814 if (adapter->itr > 1)
581d708e 1815 E1000_WRITE_REG(hw, ITR,
1da177e4
LT		 1816 1000000000 / (adapter->itr * 256));
1817 }
1818
2ae76d98 1819 if (hw->mac_type >= e1000_82571) {
2ae76d98 1820 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1e613fd9 1821 /* Reset delay timers after every interrupt */
6fc7a7ec 1822 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1e613fd9
JK		 1823#ifdef CONFIG_E1000_NAPI
1824 /* Auto-Mask interrupts upon ICR read. */
1825 ctrl_ext |= E1000_CTRL_EXT_IAME;
1826#endif
2ae76d98 1827 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1e613fd9 1828 E1000_WRITE_REG(hw, IAM, ~0);
2ae76d98
MC		 1829 E1000_WRITE_FLUSH(hw);
1830 }
1831
581d708e
MC		 1832 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1833 * the Base and Length of the Rx Descriptor Ring */
f56799ea 1834 switch (adapter->num_rx_queues) {
24025e4e
MC		 1835 case 1:
1836 default:
581d708e 1837 rdba = adapter->rx_ring[0].dma;
581d708e 1838 E1000_WRITE_REG(hw, RDLEN, rdlen);
4ca213a6
AK		 1839 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1840 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
581d708e 1841 E1000_WRITE_REG(hw, RDT, 0);
4ca213a6 1842 E1000_WRITE_REG(hw, RDH, 0);
581d708e
MC		 1843 adapter->rx_ring[0].rdh = E1000_RDH;
1844 adapter->rx_ring[0].rdt = E1000_RDT;
1845 break;
24025e4e
MC		 1846 }
1847
1da177e4 1848 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
581d708e
MC		 1849 if (hw->mac_type >= e1000_82543) {
1850 rxcsum = E1000_READ_REG(hw, RXCSUM);
96838a40 1851 if (adapter->rx_csum == TRUE) {
2d7edb92
MC		 1852 rxcsum |= E1000_RXCSUM_TUOFL;
1853
868d5309 1854 /* Enable 82571 IPv4 payload checksum for UDP fragments
2d7edb92 1855 * Must be used in conjunction with packet-split. */
96838a40
JB		 1856 if ((hw->mac_type >= e1000_82571) &&
1857 (adapter->rx_ps_pages)) {
2d7edb92
MC		 1858 rxcsum |= E1000_RXCSUM_IPPCSE;
1859 }
1860 } else {
1861 rxcsum &= ~E1000_RXCSUM_TUOFL;
1862 /* don't need to clear IPPCSE as it defaults to 0 */
1863 }
581d708e 1864 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1da177e4
LT		 1865 }
1866
1867 /* Enable Receives */
581d708e 1868 E1000_WRITE_REG(hw, RCTL, rctl);
1da177e4
LT		 1869}
1870
1871/**
581d708e 1872 * e1000_free_tx_resources - Free Tx Resources per Queue
1da177e4 1873 * @adapter: board private structure
581d708e 1874 * @tx_ring: Tx descriptor ring for a specific queue
1da177e4
LT		 1875 *
1876 * Free all transmit software resources
1877 **/
1878
3ad2cc67 1879static void
581d708e
MC		 1880e1000_free_tx_resources(struct e1000_adapter *adapter,
1881 struct e1000_tx_ring *tx_ring)
1da177e4
LT		 1882{
1883 struct pci_dev *pdev = adapter->pdev;
1884
581d708e 1885 e1000_clean_tx_ring(adapter, tx_ring);
1da177e4 1886
581d708e
MC		 1887 vfree(tx_ring->buffer_info);
1888 tx_ring->buffer_info = NULL;
1da177e4 1889
581d708e 1890 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1da177e4 1891
581d708e
MC		 1892 tx_ring->desc = NULL;
1893}
1894
1895/**
1896 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1897 * @adapter: board private structure
1898 *
1899 * Free all transmit software resources
1900 **/
1901
1902void
1903e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1904{
1905 int i;
1906
f56799ea 1907 for (i = 0; i < adapter->num_tx_queues; i++)
581d708e 1908 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1da177e4
LT		 1909}
1910
e619d523 1911static void
1da177e4
LT		 1912e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1913 struct e1000_buffer *buffer_info)
1914{
96838a40 1915 if (buffer_info->dma) {
2648345f
MC		 1916 pci_unmap_page(adapter->pdev,
1917 buffer_info->dma,
1918 buffer_info->length,
1919 PCI_DMA_TODEVICE);
1da177e4 1920 }
8241e35e 1921 if (buffer_info->skb)
1da177e4 1922 dev_kfree_skb_any(buffer_info->skb);
8241e35e 1923 memset(buffer_info, 0, sizeof(struct e1000_buffer));
1da177e4
LT		 1924}
1925
1926/**
1927 * e1000_clean_tx_ring - Free Tx Buffers
1928 * @adapter: board private structure
581d708e 1929 * @tx_ring: ring to be cleaned
1da177e4
LT		 1930 **/
1931
1932static void
581d708e
MC		 1933e1000_clean_tx_ring(struct e1000_adapter *adapter,
1934 struct e1000_tx_ring *tx_ring)
1da177e4 1935{
1da177e4
LT		 1936 struct e1000_buffer *buffer_info;
1937 unsigned long size;
1938 unsigned int i;
1939
1940 /* Free all the Tx ring sk_buffs */
1941
96838a40 1942 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 1943 buffer_info = &tx_ring->buffer_info[i];
1944 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1945 }
1946
1947 size = sizeof(struct e1000_buffer) * tx_ring->count;
1948 memset(tx_ring->buffer_info, 0, size);
1949
1950 /* Zero out the descriptor ring */
1951
1952 memset(tx_ring->desc, 0, tx_ring->size);
1953
1954 tx_ring->next_to_use = 0;
1955 tx_ring->next_to_clean = 0;
fd803241 1956 tx_ring->last_tx_tso = 0;
1da177e4 1957
581d708e
MC		 1958 writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1959 writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1960}
1961
1962/**
1963 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1964 * @adapter: board private structure
1965 **/
1966
1967static void
1968e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1969{
1970 int i;
1971
f56799ea 1972 for (i = 0; i < adapter->num_tx_queues; i++)
581d708e 1973 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1da177e4
LT		 1974}
1975
1976/**
1977 * e1000_free_rx_resources - Free Rx Resources
1978 * @adapter: board private structure
581d708e 1979 * @rx_ring: ring to clean the resources from
1da177e4
LT		 1980 *
1981 * Free all receive software resources
1982 **/
1983
3ad2cc67 1984static void
581d708e
MC		 1985e1000_free_rx_resources(struct e1000_adapter *adapter,
1986 struct e1000_rx_ring *rx_ring)
1da177e4 1987{
1da177e4
LT		 1988 struct pci_dev *pdev = adapter->pdev;
1989
581d708e 1990 e1000_clean_rx_ring(adapter, rx_ring);
1da177e4
LT		 1991
1992 vfree(rx_ring->buffer_info);
1993 rx_ring->buffer_info = NULL;
2d7edb92
MC		 1994 kfree(rx_ring->ps_page);
1995 rx_ring->ps_page = NULL;
1996 kfree(rx_ring->ps_page_dma);
1997 rx_ring->ps_page_dma = NULL;
1da177e4
LT		 1998
1999 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2000
2001 rx_ring->desc = NULL;
2002}
2003
2004/**
581d708e 2005 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1da177e4 2006 * @adapter: board private structure
581d708e
MC		 2007 *
2008 * Free all receive software resources
2009 **/
2010
2011void
2012e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2013{
2014 int i;
2015
f56799ea 2016 for (i = 0; i < adapter->num_rx_queues; i++)
581d708e
MC		 2017 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2018}
2019
2020/**
2021 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2022 * @adapter: board private structure
2023 * @rx_ring: ring to free buffers from
1da177e4
LT		 2024 **/
2025
2026static void
581d708e
MC		 2027e1000_clean_rx_ring(struct e1000_adapter *adapter,
2028 struct e1000_rx_ring *rx_ring)
1da177e4 2029{
1da177e4 2030 struct e1000_buffer *buffer_info;
2d7edb92
MC		 2031 struct e1000_ps_page *ps_page;
2032 struct e1000_ps_page_dma *ps_page_dma;
1da177e4
LT		 2033 struct pci_dev *pdev = adapter->pdev;
2034 unsigned long size;
2d7edb92 2035 unsigned int i, j;
1da177e4
LT		 2036
2037 /* Free all the Rx ring sk_buffs */
96838a40 2038 for (i = 0; i < rx_ring->count; i++) {
1da177e4 2039 buffer_info = &rx_ring->buffer_info[i];
96838a40 2040 if (buffer_info->skb) {
1da177e4
LT		 2041 pci_unmap_single(pdev,
2042 buffer_info->dma,
2043 buffer_info->length,
2044 PCI_DMA_FROMDEVICE);
2045
2046 dev_kfree_skb(buffer_info->skb);
2047 buffer_info->skb = NULL;
997f5cbd
JK		 2048 }
2049 ps_page = &rx_ring->ps_page[i];
2050 ps_page_dma = &rx_ring->ps_page_dma[i];
2051 for (j = 0; j < adapter->rx_ps_pages; j++) {
2052 if (!ps_page->ps_page[j]) break;
2053 pci_unmap_page(pdev,
2054 ps_page_dma->ps_page_dma[j],
2055 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2056 ps_page_dma->ps_page_dma[j] = 0;
2057 put_page(ps_page->ps_page[j]);
2058 ps_page->ps_page[j] = NULL;
1da177e4
LT		 2059 }
2060 }
2061
2062 size = sizeof(struct e1000_buffer) * rx_ring->count;
2063 memset(rx_ring->buffer_info, 0, size);
2d7edb92
MC		 2064 size = sizeof(struct e1000_ps_page) * rx_ring->count;
2065 memset(rx_ring->ps_page, 0, size);
2066 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2067 memset(rx_ring->ps_page_dma, 0, size);
1da177e4
LT		 2068
2069 /* Zero out the descriptor ring */
2070
2071 memset(rx_ring->desc, 0, rx_ring->size);
2072
2073 rx_ring->next_to_clean = 0;
2074 rx_ring->next_to_use = 0;
2075
581d708e
MC		 2076 writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2077 writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2078}
2079
2080/**
2081 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2082 * @adapter: board private structure
2083 **/
2084
2085static void
2086e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2087{
2088 int i;
2089
f56799ea 2090 for (i = 0; i < adapter->num_rx_queues; i++)
581d708e 2091 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1da177e4
LT		 2092}
2093
2094/* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2095 * and memory write and invalidate disabled for certain operations
2096 */
2097static void
2098e1000_enter_82542_rst(struct e1000_adapter *adapter)
2099{
2100 struct net_device *netdev = adapter->netdev;
2101 uint32_t rctl;
2102
2103 e1000_pci_clear_mwi(&adapter->hw);
2104
2105 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2106 rctl |= E1000_RCTL_RST;
2107 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2108 E1000_WRITE_FLUSH(&adapter->hw);
2109 mdelay(5);
2110
96838a40 2111 if (netif_running(netdev))
581d708e 2112 e1000_clean_all_rx_rings(adapter);
1da177e4
LT		 2113}
2114
2115static void
2116e1000_leave_82542_rst(struct e1000_adapter *adapter)
2117{
2118 struct net_device *netdev = adapter->netdev;
2119 uint32_t rctl;
2120
2121 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2122 rctl &= ~E1000_RCTL_RST;
2123 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2124 E1000_WRITE_FLUSH(&adapter->hw);
2125 mdelay(5);
2126
96838a40 2127 if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
1da177e4
LT		 2128 e1000_pci_set_mwi(&adapter->hw);
2129
96838a40 2130 if (netif_running(netdev)) {
72d64a43
JK		 2131 /* No need to loop, because 82542 supports only 1 queue */
2132 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
7c4d3367 2133 e1000_configure_rx(adapter);
72d64a43 2134 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
1da177e4
LT		 2135 }
2136}
2137
2138/**
2139 * e1000_set_mac - Change the Ethernet Address of the NIC
2140 * @netdev: network interface device structure
2141 * @p: pointer to an address structure
2142 *
2143 * Returns 0 on success, negative on failure
2144 **/
2145
2146static int
2147e1000_set_mac(struct net_device *netdev, void *p)
2148{
60490fe0 2149 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 2150 struct sockaddr *addr = p;
2151
96838a40 2152 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 2153 return -EADDRNOTAVAIL;
2154
2155 /* 82542 2.0 needs to be in reset to write receive address registers */
2156
96838a40 2157 if (adapter->hw.mac_type == e1000_82542_rev2_0)
1da177e4
LT		 2158 e1000_enter_82542_rst(adapter);
2159
2160 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2161 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2162
2163 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2164
868d5309
MC		 2165 /* With 82571 controllers, LAA may be overwritten (with the default)
2166 * due to controller reset from the other port. */
2167 if (adapter->hw.mac_type == e1000_82571) {
2168 /* activate the work around */
2169 adapter->hw.laa_is_present = 1;
2170
96838a40
JB		 2171 /* Hold a copy of the LAA in RAR[14] This is done so that
2172 * between the time RAR[0] gets clobbered and the time it
2173 * gets fixed (in e1000_watchdog), the actual LAA is in one
868d5309 2174 * of the RARs and no incoming packets directed to this port
96838a40 2175 * are dropped. Eventaully the LAA will be in RAR[0] and
868d5309 2176 * RAR[14] */
96838a40 2177 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
868d5309
MC		 2178 E1000_RAR_ENTRIES - 1);
2179 }
2180
96838a40 2181 if (adapter->hw.mac_type == e1000_82542_rev2_0)
1da177e4
LT		 2182 e1000_leave_82542_rst(adapter);
2183
2184 return 0;
2185}
2186
2187/**
2188 * e1000_set_multi - Multicast and Promiscuous mode set
2189 * @netdev: network interface device structure
2190 *
2191 * The set_multi entry point is called whenever the multicast address
2192 * list or the network interface flags are updated. This routine is
2193 * responsible for configuring the hardware for proper multicast,
2194 * promiscuous mode, and all-multi behavior.
2195 **/
2196
2197static void
2198e1000_set_multi(struct net_device *netdev)
2199{
60490fe0 2200 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 2201 struct e1000_hw *hw = &adapter->hw;
2202 struct dev_mc_list *mc_ptr;
2203 uint32_t rctl;
2204 uint32_t hash_value;
868d5309 2205 int i, rar_entries = E1000_RAR_ENTRIES;
cd94dd0b
AK		 2206 int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2207 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2208 E1000_NUM_MTA_REGISTERS;
2209
2210 if (adapter->hw.mac_type == e1000_ich8lan)
2211 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
1da177e4 2212
868d5309
MC		 2213 /* reserve RAR[14] for LAA over-write work-around */
2214 if (adapter->hw.mac_type == e1000_82571)
2215 rar_entries--;
1da177e4 2216
2648345f
MC		 2217 /* Check for Promiscuous and All Multicast modes */
2218
1da177e4
LT		 2219 rctl = E1000_READ_REG(hw, RCTL);
2220
96838a40 2221 if (netdev->flags & IFF_PROMISC) {
1da177e4 2222 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
96838a40 2223 } else if (netdev->flags & IFF_ALLMULTI) {
1da177e4
LT		 2224 rctl |= E1000_RCTL_MPE;
2225 rctl &= ~E1000_RCTL_UPE;
2226 } else {
2227 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2228 }
2229
2230 E1000_WRITE_REG(hw, RCTL, rctl);
2231
2232 /* 82542 2.0 needs to be in reset to write receive address registers */
2233
96838a40 2234 if (hw->mac_type == e1000_82542_rev2_0)
1da177e4
LT		 2235 e1000_enter_82542_rst(adapter);
2236
2237 /* load the first 14 multicast address into the exact filters 1-14
2238 * RAR 0 is used for the station MAC adddress
2239 * if there are not 14 addresses, go ahead and clear the filters
868d5309 2240 * -- with 82571 controllers only 0-13 entries are filled here
1da177e4
LT		 2241 */
2242 mc_ptr = netdev->mc_list;
2243
96838a40 2244 for (i = 1; i < rar_entries; i++) {
868d5309 2245 if (mc_ptr) {
1da177e4
LT		 2246 e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2247 mc_ptr = mc_ptr->next;
2248 } else {
2249 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
4ca213a6 2250 E1000_WRITE_FLUSH(hw);
1da177e4 2251 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
4ca213a6 2252 E1000_WRITE_FLUSH(hw);
1da177e4
LT		 2253 }
2254 }
2255
2256 /* clear the old settings from the multicast hash table */
2257
cd94dd0b 2258 for (i = 0; i < mta_reg_count; i++) {
1da177e4 2259 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
4ca213a6
AK		 2260 E1000_WRITE_FLUSH(hw);
2261 }
1da177e4
LT		 2262
2263 /* load any remaining addresses into the hash table */
2264
96838a40 2265 for (; mc_ptr; mc_ptr = mc_ptr->next) {
1da177e4
LT		 2266 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2267 e1000_mta_set(hw, hash_value);
2268 }
2269
96838a40 2270 if (hw->mac_type == e1000_82542_rev2_0)
1da177e4 2271 e1000_leave_82542_rst(adapter);
1da177e4
LT		 2272}
2273
2274/* Need to wait a few seconds after link up to get diagnostic information from
2275 * the phy */
2276
2277static void
2278e1000_update_phy_info(unsigned long data)
2279{
2280 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2281 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2282}
2283
2284/**
2285 * e1000_82547_tx_fifo_stall - Timer Call-back
2286 * @data: pointer to adapter cast into an unsigned long
2287 **/
2288
2289static void
2290e1000_82547_tx_fifo_stall(unsigned long data)
2291{
2292 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2293 struct net_device *netdev = adapter->netdev;
2294 uint32_t tctl;
2295
96838a40
JB		 2296 if (atomic_read(&adapter->tx_fifo_stall)) {
2297 if ((E1000_READ_REG(&adapter->hw, TDT) ==
1da177e4
LT		 2298 E1000_READ_REG(&adapter->hw, TDH)) &&
2299 (E1000_READ_REG(&adapter->hw, TDFT) ==
2300 E1000_READ_REG(&adapter->hw, TDFH)) &&
2301 (E1000_READ_REG(&adapter->hw, TDFTS) ==
2302 E1000_READ_REG(&adapter->hw, TDFHS))) {
2303 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2304 E1000_WRITE_REG(&adapter->hw, TCTL,
2305 tctl & ~E1000_TCTL_EN);
2306 E1000_WRITE_REG(&adapter->hw, TDFT,
2307 adapter->tx_head_addr);
2308 E1000_WRITE_REG(&adapter->hw, TDFH,
2309 adapter->tx_head_addr);
2310 E1000_WRITE_REG(&adapter->hw, TDFTS,
2311 adapter->tx_head_addr);
2312 E1000_WRITE_REG(&adapter->hw, TDFHS,
2313 adapter->tx_head_addr);
2314 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2315 E1000_WRITE_FLUSH(&adapter->hw);
2316
2317 adapter->tx_fifo_head = 0;
2318 atomic_set(&adapter->tx_fifo_stall, 0);
2319 netif_wake_queue(netdev);
2320 } else {
2321 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2322 }
2323 }
2324}
2325
2326/**
2327 * e1000_watchdog - Timer Call-back
2328 * @data: pointer to adapter cast into an unsigned long
2329 **/
2330static void
2331e1000_watchdog(unsigned long data)
2332{
2333 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1da177e4 2334 struct net_device *netdev = adapter->netdev;
545c67c0 2335 struct e1000_tx_ring *txdr = adapter->tx_ring;
7e6c9861 2336 uint32_t link, tctl;
cd94dd0b
AK		 2337 int32_t ret_val;
2338
2339 ret_val = e1000_check_for_link(&adapter->hw);
2340 if ((ret_val == E1000_ERR_PHY) &&
2341 (adapter->hw.phy_type == e1000_phy_igp_3) &&
2342 (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2343 /* See e1000_kumeran_lock_loss_workaround() */
2344 DPRINTK(LINK, INFO,
2345 "Gigabit has been disabled, downgrading speed\n");
2346 }
2d7edb92
MC		 2347 if (adapter->hw.mac_type == e1000_82573) {
2348 e1000_enable_tx_pkt_filtering(&adapter->hw);
96838a40 2349 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2d7edb92 2350 e1000_update_mng_vlan(adapter);
96838a40 2351 }
1da177e4 2352
96838a40 2353 if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
1da177e4
LT		 2354 !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2355 link = !adapter->hw.serdes_link_down;
2356 else
2357 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2358
96838a40
JB		 2359 if (link) {
2360 if (!netif_carrier_ok(netdev)) {
fe7fe28e 2361 boolean_t txb2b = 1;
1da177e4
LT		 2362 e1000_get_speed_and_duplex(&adapter->hw,
2363 &adapter->link_speed,
2364 &adapter->link_duplex);
2365
2366 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2367 adapter->link_speed,
2368 adapter->link_duplex == FULL_DUPLEX ?
2369 "Full Duplex" : "Half Duplex");
2370
7e6c9861
JK		 2371 /* tweak tx_queue_len according to speed/duplex
2372 * and adjust the timeout factor */
66a2b0a3
JK		 2373 netdev->tx_queue_len = adapter->tx_queue_len;
2374 adapter->tx_timeout_factor = 1;
7e6c9861
JK		 2375 switch (adapter->link_speed) {
2376 case SPEED_10:
fe7fe28e 2377 txb2b = 0;
7e6c9861
JK		 2378 netdev->tx_queue_len = 10;
2379 adapter->tx_timeout_factor = 8;
2380 break;
2381 case SPEED_100:
fe7fe28e 2382 txb2b = 0;
7e6c9861
JK		 2383 netdev->tx_queue_len = 100;
2384 /* maybe add some timeout factor ? */
2385 break;
2386 }
2387
fe7fe28e 2388 if ((adapter->hw.mac_type == e1000_82571 ||
7e6c9861 2389 adapter->hw.mac_type == e1000_82572) &&
fe7fe28e 2390 txb2b == 0) {
7e6c9861
JK		 2391#define SPEED_MODE_BIT (1 << 21)
2392 uint32_t tarc0;
2393 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2394 tarc0 &= ~SPEED_MODE_BIT;
2395 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2396 }
2397
2398#ifdef NETIF_F_TSO
2399 /* disable TSO for pcie and 10/100 speeds, to avoid
2400 * some hardware issues */
2401 if (!adapter->tso_force &&
2402 adapter->hw.bus_type == e1000_bus_type_pci_express){
66a2b0a3
JK		 2403 switch (adapter->link_speed) {
2404 case SPEED_10:
66a2b0a3 2405 case SPEED_100:
7e6c9861
JK		 2406 DPRINTK(PROBE,INFO,
2407 "10/100 speed: disabling TSO\n");
2408 netdev->features &= ~NETIF_F_TSO;
2409 break;
2410 case SPEED_1000:
2411 netdev->features |= NETIF_F_TSO;
2412 break;
2413 default:
2414 /* oops */
66a2b0a3
JK		 2415 break;
2416 }
2417 }
7e6c9861
JK		 2418#endif
2419
2420 /* enable transmits in the hardware, need to do this
2421 * after setting TARC0 */
2422 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2423 tctl |= E1000_TCTL_EN;
2424 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
66a2b0a3 2425
1da177e4
LT		 2426 netif_carrier_on(netdev);
2427 netif_wake_queue(netdev);
2428 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2429 adapter->smartspeed = 0;
2430 }
2431 } else {
96838a40 2432 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 2433 adapter->link_speed = 0;
2434 adapter->link_duplex = 0;
2435 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2436 netif_carrier_off(netdev);
2437 netif_stop_queue(netdev);
2438 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
87041639
JK		 2439
2440 /* 80003ES2LAN workaround--
2441 * For packet buffer work-around on link down event;
2442 * disable receives in the ISR and
2443 * reset device here in the watchdog
2444 */
2445 if (adapter->hw.mac_type == e1000_80003es2lan) {
2446 /* reset device */
2447 schedule_work(&adapter->reset_task);
2448 }
1da177e4
LT		 2449 }
2450
2451 e1000_smartspeed(adapter);
2452 }
2453
2454 e1000_update_stats(adapter);
2455
2456 adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2457 adapter->tpt_old = adapter->stats.tpt;
2458 adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2459 adapter->colc_old = adapter->stats.colc;
2460
2461 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2462 adapter->gorcl_old = adapter->stats.gorcl;
2463 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2464 adapter->gotcl_old = adapter->stats.gotcl;
2465
2466 e1000_update_adaptive(&adapter->hw);
2467
f56799ea 2468 if (!netif_carrier_ok(netdev)) {
581d708e 2469 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 2470 /* We've lost link, so the controller stops DMA,
2471 * but we've got queued Tx work that's never going
2472 * to get done, so reset controller to flush Tx.
2473 * (Do the reset outside of interrupt context). */
87041639
JK		 2474 adapter->tx_timeout_count++;
2475 schedule_work(&adapter->reset_task);
1da177e4
LT		 2476 }
2477 }
2478
2479 /* Dynamic mode for Interrupt Throttle Rate (ITR) */
96838a40 2480 if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
1da177e4
LT		 2481 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2482 * asymmetrical Tx or Rx gets ITR=8000; everyone
2483 * else is between 2000-8000. */
2484 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
96838a40 2485 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
1da177e4
LT		 2486 adapter->gotcl - adapter->gorcl :
2487 adapter->gorcl - adapter->gotcl) / 10000;
2488 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2489 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2490 }
2491
2492 /* Cause software interrupt to ensure rx ring is cleaned */
2493 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2494
2648345f 2495 /* Force detection of hung controller every watchdog period */
1da177e4
LT		 2496 adapter->detect_tx_hung = TRUE;
2497
96838a40 2498 /* With 82571 controllers, LAA may be overwritten due to controller
868d5309
MC		 2499 * reset from the other port. Set the appropriate LAA in RAR[0] */
2500 if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2501 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2502
1da177e4
LT		 2503 /* Reset the timer */
2504 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2505}
2506
2507#define E1000_TX_FLAGS_CSUM 0x00000001
2508#define E1000_TX_FLAGS_VLAN 0x00000002
2509#define E1000_TX_FLAGS_TSO 0x00000004
2d7edb92 2510#define E1000_TX_FLAGS_IPV4 0x00000008
1da177e4
LT		 2511#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2512#define E1000_TX_FLAGS_VLAN_SHIFT 16
2513
e619d523 2514static int
581d708e
MC		 2515e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2516 struct sk_buff *skb)
1da177e4
LT		 2517{
2518#ifdef NETIF_F_TSO
2519 struct e1000_context_desc *context_desc;
545c67c0 2520 struct e1000_buffer *buffer_info;
1da177e4
LT		 2521 unsigned int i;
2522 uint32_t cmd_length = 0;
2d7edb92 2523 uint16_t ipcse = 0, tucse, mss;
1da177e4
LT		 2524 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2525 int err;
2526
89114afd 2527 if (skb_is_gso(skb)) {
1da177e4
LT		 2528 if (skb_header_cloned(skb)) {
2529 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2530 if (err)
2531 return err;
2532 }
2533
2534 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
7967168c 2535 mss = skb_shinfo(skb)->gso_size;
60828236 2536 if (skb->protocol == htons(ETH_P_IP)) {
2d7edb92
MC		 2537 skb->nh.iph->tot_len = 0;
2538 skb->nh.iph->check = 0;
2539 skb->h.th->check =
2540 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2541 skb->nh.iph->daddr,
2542 0,
2543 IPPROTO_TCP,
2544 0);
2545 cmd_length = E1000_TXD_CMD_IP;
2546 ipcse = skb->h.raw - skb->data - 1;
2547#ifdef NETIF_F_TSO_IPV6
96838a40 2548 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2d7edb92
MC		 2549 skb->nh.ipv6h->payload_len = 0;
2550 skb->h.th->check =
2551 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2552 &skb->nh.ipv6h->daddr,
2553 0,
2554 IPPROTO_TCP,
2555 0);
2556 ipcse = 0;
2557#endif
2558 }
1da177e4
LT		 2559 ipcss = skb->nh.raw - skb->data;
2560 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
1da177e4
LT		 2561 tucss = skb->h.raw - skb->data;
2562 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2563 tucse = 0;
2564
2565 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2d7edb92 2566 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
1da177e4 2567
581d708e
MC		 2568 i = tx_ring->next_to_use;
2569 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
545c67c0 2570 buffer_info = &tx_ring->buffer_info[i];
1da177e4
LT		 2571
2572 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2573 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2574 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2575 context_desc->upper_setup.tcp_fields.tucss = tucss;
2576 context_desc->upper_setup.tcp_fields.tucso = tucso;
2577 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2578 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2579 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2580 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2581
545c67c0
JK		 2582 buffer_info->time_stamp = jiffies;
2583
581d708e
MC		 2584 if (++i == tx_ring->count) i = 0;
2585 tx_ring->next_to_use = i;
1da177e4 2586
8241e35e 2587 return TRUE;
1da177e4
LT		 2588 }
2589#endif
2590
8241e35e 2591 return FALSE;
1da177e4
LT		 2592}
2593
e619d523 2594static boolean_t
581d708e
MC		 2595e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2596 struct sk_buff *skb)
1da177e4
LT		 2597{
2598 struct e1000_context_desc *context_desc;
545c67c0 2599 struct e1000_buffer *buffer_info;
1da177e4
LT		 2600 unsigned int i;
2601 uint8_t css;
2602
96838a40 2603 if (likely(skb->ip_summed == CHECKSUM_HW)) {
1da177e4
LT		 2604 css = skb->h.raw - skb->data;
2605
581d708e 2606 i = tx_ring->next_to_use;
545c67c0 2607 buffer_info = &tx_ring->buffer_info[i];
581d708e 2608 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
1da177e4
LT		 2609
2610 context_desc->upper_setup.tcp_fields.tucss = css;
2611 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2612 context_desc->upper_setup.tcp_fields.tucse = 0;
2613 context_desc->tcp_seg_setup.data = 0;
2614 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2615
545c67c0
JK		 2616 buffer_info->time_stamp = jiffies;
2617
581d708e
MC		 2618 if (unlikely(++i == tx_ring->count)) i = 0;
2619 tx_ring->next_to_use = i;
1da177e4
LT		 2620
2621 return TRUE;
2622 }
2623
2624 return FALSE;
2625}
2626
2627#define E1000_MAX_TXD_PWR 12
2628#define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2629
e619d523 2630static int
581d708e
MC		 2631e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2632 struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2633 unsigned int nr_frags, unsigned int mss)
1da177e4 2634{
1da177e4
LT		 2635 struct e1000_buffer *buffer_info;
2636 unsigned int len = skb->len;
2637 unsigned int offset = 0, size, count = 0, i;
2638 unsigned int f;
2639 len -= skb->data_len;
2640
2641 i = tx_ring->next_to_use;
2642
96838a40 2643 while (len) {
1da177e4
LT		 2644 buffer_info = &tx_ring->buffer_info[i];
2645 size = min(len, max_per_txd);
2646#ifdef NETIF_F_TSO
fd803241
JK		 2647 /* Workaround for Controller erratum --
2648 * descriptor for non-tso packet in a linear SKB that follows a
2649 * tso gets written back prematurely before the data is fully
0f15a8fa 2650 * DMA'd to the controller */
fd803241 2651 if (!skb->data_len && tx_ring->last_tx_tso &&
89114afd 2652 !skb_is_gso(skb)) {
fd803241
JK		 2653 tx_ring->last_tx_tso = 0;
2654 size -= 4;
2655 }
2656
1da177e4
LT		 2657 /* Workaround for premature desc write-backs
2658 * in TSO mode. Append 4-byte sentinel desc */
96838a40 2659 if (unlikely(mss && !nr_frags && size == len && size > 8))
1da177e4
LT		 2660 size -= 4;
2661#endif
97338bde
MC		 2662 /* work-around for errata 10 and it applies
2663 * to all controllers in PCI-X mode
2664 * The fix is to make sure that the first descriptor of a
2665 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2666 */
96838a40 2667 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
97338bde
MC		 2668 (size > 2015) && count == 0))
2669 size = 2015;
96838a40 2670
1da177e4
LT		 2671 /* Workaround for potential 82544 hang in PCI-X. Avoid
2672 * terminating buffers within evenly-aligned dwords. */
96838a40 2673 if (unlikely(adapter->pcix_82544 &&
1da177e4
LT		 2674 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2675 size > 4))
2676 size -= 4;
2677
2678 buffer_info->length = size;
2679 buffer_info->dma =
2680 pci_map_single(adapter->pdev,
2681 skb->data + offset,
2682 size,
2683 PCI_DMA_TODEVICE);
2684 buffer_info->time_stamp = jiffies;
2685
2686 len -= size;
2687 offset += size;
2688 count++;
96838a40 2689 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4
LT		 2690 }
2691
96838a40 2692 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 2693 struct skb_frag_struct *frag;
2694
2695 frag = &skb_shinfo(skb)->frags[f];
2696 len = frag->size;
2697 offset = frag->page_offset;
2698
96838a40 2699 while (len) {
1da177e4
LT		 2700 buffer_info = &tx_ring->buffer_info[i];
2701 size = min(len, max_per_txd);
2702#ifdef NETIF_F_TSO
2703 /* Workaround for premature desc write-backs
2704 * in TSO mode. Append 4-byte sentinel desc */
96838a40 2705 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
1da177e4
LT		 2706 size -= 4;
2707#endif
2708 /* Workaround for potential 82544 hang in PCI-X.
2709 * Avoid terminating buffers within evenly-aligned
2710 * dwords. */
96838a40 2711 if (unlikely(adapter->pcix_82544 &&
1da177e4
LT		 2712 !((unsigned long)(frag->page+offset+size-1) & 4) &&
2713 size > 4))
2714 size -= 4;
2715
2716 buffer_info->length = size;
2717 buffer_info->dma =
2718 pci_map_page(adapter->pdev,
2719 frag->page,
2720 offset,
2721 size,
2722 PCI_DMA_TODEVICE);
2723 buffer_info->time_stamp = jiffies;
2724
2725 len -= size;
2726 offset += size;
2727 count++;
96838a40 2728 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4
LT		 2729 }
2730 }
2731
2732 i = (i == 0) ? tx_ring->count - 1 : i - 1;
2733 tx_ring->buffer_info[i].skb = skb;
2734 tx_ring->buffer_info[first].next_to_watch = i;
2735
2736 return count;
2737}
2738
e619d523 2739static void
581d708e
MC		 2740e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2741 int tx_flags, int count)
1da177e4 2742{
1da177e4
LT		 2743 struct e1000_tx_desc *tx_desc = NULL;
2744 struct e1000_buffer *buffer_info;
2745 uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2746 unsigned int i;
2747
96838a40 2748 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
1da177e4
LT		 2749 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2750 E1000_TXD_CMD_TSE;
2d7edb92
MC		 2751 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2752
96838a40 2753 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2d7edb92 2754 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
1da177e4
LT		 2755 }
2756
96838a40 2757 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
1da177e4
LT		 2758 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2759 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2760 }
2761
96838a40 2762 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
1da177e4
LT		 2763 txd_lower |= E1000_TXD_CMD_VLE;
2764 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2765 }
2766
2767 i = tx_ring->next_to_use;
2768
96838a40 2769 while (count--) {
1da177e4
LT		 2770 buffer_info = &tx_ring->buffer_info[i];
2771 tx_desc = E1000_TX_DESC(*tx_ring, i);
2772 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2773 tx_desc->lower.data =
2774 cpu_to_le32(txd_lower | buffer_info->length);
2775 tx_desc->upper.data = cpu_to_le32(txd_upper);
96838a40 2776 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4
LT		 2777 }
2778
2779 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2780
2781 /* Force memory writes to complete before letting h/w
2782 * know there are new descriptors to fetch. (Only
2783 * applicable for weak-ordered memory model archs,
2784 * such as IA-64). */
2785 wmb();
2786
2787 tx_ring->next_to_use = i;
581d708e 2788 writel(i, adapter->hw.hw_addr + tx_ring->tdt);
1da177e4
LT		 2789}
2790
2791/**
2792 * 82547 workaround to avoid controller hang in half-duplex environment.
2793 * The workaround is to avoid queuing a large packet that would span
2794 * the internal Tx FIFO ring boundary by notifying the stack to resend
2795 * the packet at a later time. This gives the Tx FIFO an opportunity to
2796 * flush all packets. When that occurs, we reset the Tx FIFO pointers
2797 * to the beginning of the Tx FIFO.
2798 **/
2799
2800#define E1000_FIFO_HDR 0x10
2801#define E1000_82547_PAD_LEN 0x3E0
2802
e619d523 2803static int
1da177e4
LT		 2804e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2805{
2806 uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2807 uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2808
2809 E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2810
96838a40 2811 if (adapter->link_duplex != HALF_DUPLEX)
1da177e4
LT		 2812 goto no_fifo_stall_required;
2813
96838a40 2814 if (atomic_read(&adapter->tx_fifo_stall))
1da177e4
LT		 2815 return 1;
2816
96838a40 2817 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
1da177e4
LT		 2818 atomic_set(&adapter->tx_fifo_stall, 1);
2819 return 1;
2820 }
2821
2822no_fifo_stall_required:
2823 adapter->tx_fifo_head += skb_fifo_len;
96838a40 2824 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
1da177e4
LT		 2825 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2826 return 0;
2827}
2828
2d7edb92 2829#define MINIMUM_DHCP_PACKET_SIZE 282
e619d523 2830static int
2d7edb92
MC		 2831e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2832{
2833 struct e1000_hw *hw = &adapter->hw;
2834 uint16_t length, offset;
96838a40
JB		 2835 if (vlan_tx_tag_present(skb)) {
2836 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2d7edb92
MC		 2837 ( adapter->hw.mng_cookie.status &
2838 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2839 return 0;
2840 }
20a44028 2841 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2d7edb92 2842 struct ethhdr *eth = (struct ethhdr *) skb->data;
96838a40
JB		 2843 if ((htons(ETH_P_IP) == eth->h_proto)) {
2844 const struct iphdr *ip =
2d7edb92 2845 (struct iphdr *)((uint8_t *)skb->data+14);
96838a40
JB		 2846 if (IPPROTO_UDP == ip->protocol) {
2847 struct udphdr *udp =
2848 (struct udphdr *)((uint8_t *)ip +
2d7edb92 2849 (ip->ihl << 2));
96838a40 2850 if (ntohs(udp->dest) == 67) {
2d7edb92
MC		 2851 offset = (uint8_t *)udp + 8 - skb->data;
2852 length = skb->len - offset;
2853
2854 return e1000_mng_write_dhcp_info(hw,
96838a40 2855 (uint8_t *)udp + 8,
2d7edb92
MC		 2856 length);
2857 }
2858 }
2859 }
2860 }
2861 return 0;
2862}
2863
1da177e4
LT		 2864#define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2865static int
2866e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2867{
60490fe0 2868 struct e1000_adapter *adapter = netdev_priv(netdev);
581d708e 2869 struct e1000_tx_ring *tx_ring;
1da177e4
LT		 2870 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2871 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2872 unsigned int tx_flags = 0;
2873 unsigned int len = skb->len;
2874 unsigned long flags;
2875 unsigned int nr_frags = 0;
2876 unsigned int mss = 0;
2877 int count = 0;
76c224bc 2878 int tso;
1da177e4
LT		 2879 unsigned int f;
2880 len -= skb->data_len;
2881
581d708e 2882 tx_ring = adapter->tx_ring;
24025e4e 2883
581d708e 2884 if (unlikely(skb->len <= 0)) {
1da177e4
LT		 2885 dev_kfree_skb_any(skb);
2886 return NETDEV_TX_OK;
2887 }
2888
2889#ifdef NETIF_F_TSO
7967168c 2890 mss = skb_shinfo(skb)->gso_size;
76c224bc 2891 /* The controller does a simple calculation to
1da177e4
LT		 2892 * make sure there is enough room in the FIFO before
2893 * initiating the DMA for each buffer. The calc is:
2894 * 4 = ceil(buffer len/mss). To make sure we don't
2895 * overrun the FIFO, adjust the max buffer len if mss
2896 * drops. */
96838a40 2897 if (mss) {
9a3056da 2898 uint8_t hdr_len;
1da177e4
LT		 2899 max_per_txd = min(mss << 2, max_per_txd);
2900 max_txd_pwr = fls(max_per_txd) - 1;
9a3056da 2901
9f687888 2902 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
9a3056da
JK		 2903 * points to just header, pull a few bytes of payload from
2904 * frags into skb->data */
2905 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
9f687888
JK		 2906 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
2907 switch (adapter->hw.mac_type) {
2908 unsigned int pull_size;
2909 case e1000_82571:
2910 case e1000_82572:
2911 case e1000_82573:
cd94dd0b 2912 case e1000_ich8lan:
9f687888
JK		 2913 pull_size = min((unsigned int)4, skb->data_len);
2914 if (!__pskb_pull_tail(skb, pull_size)) {
a5eafce2 2915 DPRINTK(DRV, ERR,
9f687888
JK		 2916 "__pskb_pull_tail failed.\n");
2917 dev_kfree_skb_any(skb);
749dfc70 2918 return NETDEV_TX_OK;
9f687888
JK		 2919 }
2920 len = skb->len - skb->data_len;
2921 break;
2922 default:
2923 /* do nothing */
2924 break;
d74bbd3b 2925 }
9a3056da 2926 }
1da177e4
LT		 2927 }
2928
9a3056da 2929 /* reserve a descriptor for the offload context */
96838a40 2930 if ((mss) || (skb->ip_summed == CHECKSUM_HW))
1da177e4 2931 count++;
2648345f 2932 count++;
1da177e4 2933#else
96838a40 2934 if (skb->ip_summed == CHECKSUM_HW)
1da177e4
LT		 2935 count++;
2936#endif
fd803241
JK		 2937
2938#ifdef NETIF_F_TSO
2939 /* Controller Erratum workaround */
89114afd 2940 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
fd803241
JK		 2941 count++;
2942#endif
2943
1da177e4
LT		 2944 count += TXD_USE_COUNT(len, max_txd_pwr);
2945
96838a40 2946 if (adapter->pcix_82544)
1da177e4
LT		 2947 count++;
2948
96838a40 2949 /* work-around for errata 10 and it applies to all controllers
97338bde
MC		 2950 * in PCI-X mode, so add one more descriptor to the count
2951 */
96838a40 2952 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
97338bde
MC		 2953 (len > 2015)))
2954 count++;
2955
1da177e4 2956 nr_frags = skb_shinfo(skb)->nr_frags;
96838a40 2957 for (f = 0; f < nr_frags; f++)
1da177e4
LT		 2958 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2959 max_txd_pwr);
96838a40 2960 if (adapter->pcix_82544)
1da177e4
LT		 2961 count += nr_frags;
2962
0f15a8fa
JK		 2963
2964 if (adapter->hw.tx_pkt_filtering &&
2965 (adapter->hw.mac_type == e1000_82573))
2d7edb92
MC		 2966 e1000_transfer_dhcp_info(adapter, skb);
2967
581d708e
MC		 2968 local_irq_save(flags);
2969 if (!spin_trylock(&tx_ring->tx_lock)) {
2970 /* Collision - tell upper layer to requeue */
2971 local_irq_restore(flags);
2972 return NETDEV_TX_LOCKED;
2973 }
1da177e4
LT		 2974
2975 /* need: count + 2 desc gap to keep tail from touching
2976 * head, otherwise try next time */
581d708e 2977 if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
1da177e4 2978 netif_stop_queue(netdev);
581d708e 2979 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 2980 return NETDEV_TX_BUSY;
2981 }
2982
96838a40
JB		 2983 if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2984 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
1da177e4
LT		 2985 netif_stop_queue(netdev);
2986 mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
581d708e 2987 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 2988 return NETDEV_TX_BUSY;
2989 }
2990 }
2991
96838a40 2992 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
1da177e4
LT		 2993 tx_flags |= E1000_TX_FLAGS_VLAN;
2994 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2995 }
2996
581d708e 2997 first = tx_ring->next_to_use;
96838a40 2998
581d708e 2999 tso = e1000_tso(adapter, tx_ring, skb);
1da177e4
LT		 3000 if (tso < 0) {
3001 dev_kfree_skb_any(skb);
581d708e 3002 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 3003 return NETDEV_TX_OK;
3004 }
3005
fd803241
JK		 3006 if (likely(tso)) {
3007 tx_ring->last_tx_tso = 1;
1da177e4 3008 tx_flags |= E1000_TX_FLAGS_TSO;
fd803241 3009 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
1da177e4
LT		 3010 tx_flags |= E1000_TX_FLAGS_CSUM;
3011
2d7edb92 3012 /* Old method was to assume IPv4 packet by default if TSO was enabled.
868d5309 3013 * 82571 hardware supports TSO capabilities for IPv6 as well...
2d7edb92 3014 * no longer assume, we must. */
60828236 3015 if (likely(skb->protocol == htons(ETH_P_IP)))
2d7edb92
MC		 3016 tx_flags |= E1000_TX_FLAGS_IPV4;
3017
581d708e
MC		 3018 e1000_tx_queue(adapter, tx_ring, tx_flags,
3019 e1000_tx_map(adapter, tx_ring, skb, first,
3020 max_per_txd, nr_frags, mss));
1da177e4
LT		 3021
3022 netdev->trans_start = jiffies;
3023
3024 /* Make sure there is space in the ring for the next send. */
581d708e 3025 if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
1da177e4
LT		 3026 netif_stop_queue(netdev);
3027
581d708e 3028 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 3029 return NETDEV_TX_OK;
3030}
3031
3032/**
3033 * e1000_tx_timeout - Respond to a Tx Hang
3034 * @netdev: network interface device structure
3035 **/
3036
3037static void
3038e1000_tx_timeout(struct net_device *netdev)
3039{
60490fe0 3040 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 3041
3042 /* Do the reset outside of interrupt context */
87041639
JK		 3043 adapter->tx_timeout_count++;
3044 schedule_work(&adapter->reset_task);
1da177e4
LT		 3045}
3046
3047static void
87041639 3048e1000_reset_task(struct net_device *netdev)
1da177e4 3049{
60490fe0 3050 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 3051
2db10a08 3052 e1000_reinit_locked(adapter);
1da177e4
LT		 3053}
3054
3055/**
3056 * e1000_get_stats - Get System Network Statistics
3057 * @netdev: network interface device structure
3058 *
3059 * Returns the address of the device statistics structure.
3060 * The statistics are actually updated from the timer callback.
3061 **/
3062
3063static struct net_device_stats *
3064e1000_get_stats(struct net_device *netdev)
3065{
60490fe0 3066 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 3067
6b7660cd 3068 /* only return the current stats */
1da177e4
LT		 3069 return &adapter->net_stats;
3070}
3071
3072/**
3073 * e1000_change_mtu - Change the Maximum Transfer Unit
3074 * @netdev: network interface device structure
3075 * @new_mtu: new value for maximum frame size
3076 *
3077 * Returns 0 on success, negative on failure
3078 **/
3079
3080static int
3081e1000_change_mtu(struct net_device *netdev, int new_mtu)
3082{
60490fe0 3083 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 3084 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
85b22eb6 3085 uint16_t eeprom_data = 0;
1da177e4 3086
96838a40
JB		 3087 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3088 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3089 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
1da177e4 3090 return -EINVAL;
2d7edb92 3091 }
1da177e4 3092
997f5cbd
JK		 3093 /* Adapter-specific max frame size limits. */
3094 switch (adapter->hw.mac_type) {
9e2feace 3095 case e1000_undefined ... e1000_82542_rev2_1:
cd94dd0b 3096 case e1000_ich8lan:
997f5cbd
JK		 3097 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3098 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
2d7edb92 3099 return -EINVAL;
2d7edb92 3100 }
997f5cbd 3101 break;
85b22eb6
JK		 3102 case e1000_82573:
3103 /* only enable jumbo frames if ASPM is disabled completely
3104 * this means both bits must be zero in 0x1A bits 3:2 */
3105 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3106 &eeprom_data);
3107 if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
3108 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3109 DPRINTK(PROBE, ERR,
3110 "Jumbo Frames not supported.\n");
3111 return -EINVAL;
3112 }
3113 break;
3114 }
3115 /* fall through to get support */
997f5cbd
JK		 3116 case e1000_82571:
3117 case e1000_82572:
87041639 3118 case e1000_80003es2lan:
997f5cbd
JK		 3119#define MAX_STD_JUMBO_FRAME_SIZE 9234
3120 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3121 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3122 return -EINVAL;
3123 }
3124 break;
3125 default:
3126 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3127 break;
1da177e4
LT		 3128 }
3129
9e2feace
AK		 3130 /* NOTE: dev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3131 * means we reserve 2 more, this pushes us to allocate from the next
3132 * larger slab size
3133 * i.e. RXBUFFER_2048 --> size-4096 slab */
3134
3135 if (max_frame <= E1000_RXBUFFER_256)
3136 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3137 else if (max_frame <= E1000_RXBUFFER_512)
3138 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3139 else if (max_frame <= E1000_RXBUFFER_1024)
3140 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3141 else if (max_frame <= E1000_RXBUFFER_2048)
3142 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3143 else if (max_frame <= E1000_RXBUFFER_4096)
3144 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3145 else if (max_frame <= E1000_RXBUFFER_8192)
3146 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3147 else if (max_frame <= E1000_RXBUFFER_16384)
3148 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3149
3150 /* adjust allocation if LPE protects us, and we aren't using SBP */
3151#define MAXIMUM_ETHERNET_VLAN_SIZE 1522
3152 if (!adapter->hw.tbi_compatibility_on &&
3153 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3154 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3155 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
997f5cbd 3156
2d7edb92
MC		 3157 netdev->mtu = new_mtu;
3158
2db10a08
AK		 3159 if (netif_running(netdev))
3160 e1000_reinit_locked(adapter);
1da177e4 3161
1da177e4
LT		 3162 adapter->hw.max_frame_size = max_frame;
3163
3164 return 0;
3165}
3166
3167/**
3168 * e1000_update_stats - Update the board statistics counters
3169 * @adapter: board private structure
3170 **/
3171
3172void
3173e1000_update_stats(struct e1000_adapter *adapter)
3174{
3175 struct e1000_hw *hw = &adapter->hw;
282f33c9 3176 struct pci_dev *pdev = adapter->pdev;
1da177e4
LT		 3177 unsigned long flags;
3178 uint16_t phy_tmp;
3179
3180#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3181
282f33c9
LV		 3182 /*
3183 * Prevent stats update while adapter is being reset, or if the pci
3184 * connection is down.
3185 */
9026729b 3186 if (adapter->link_speed == 0)
282f33c9
LV		 3187 return;
3188 if (pdev->error_state && pdev->error_state != pci_channel_io_normal)
9026729b
AK		 3189 return;
3190
1da177e4
LT		 3191 spin_lock_irqsave(&adapter->stats_lock, flags);
3192
3193 /* these counters are modified from e1000_adjust_tbi_stats,
3194 * called from the interrupt context, so they must only
3195 * be written while holding adapter->stats_lock
3196 */
3197
3198 adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3199 adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3200 adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3201 adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3202 adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3203 adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3204 adapter->stats.roc += E1000_READ_REG(hw, ROC);
cd94dd0b
AK		 3205
3206 if (adapter->hw.mac_type != e1000_ich8lan) {
1da177e4
LT		 3207 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3208 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3209 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3210 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3211 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3212 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
cd94dd0b 3213 }
1da177e4
LT		 3214
3215 adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3216 adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3217 adapter->stats.scc += E1000_READ_REG(hw, SCC);
3218 adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3219 adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3220 adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3221 adapter->stats.dc += E1000_READ_REG(hw, DC);
3222 adapter->stats.sec += E1000_READ_REG(hw, SEC);
3223 adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3224 adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3225 adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3226 adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3227 adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3228 adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3229 adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3230 adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3231 adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3232 adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3233 adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3234 adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3235 adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3236 adapter->stats.torl += E1000_READ_REG(hw, TORL);
3237 adapter->stats.torh += E1000_READ_REG(hw, TORH);
3238 adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3239 adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3240 adapter->stats.tpr += E1000_READ_REG(hw, TPR);
cd94dd0b
AK		 3241
3242 if (adapter->hw.mac_type != e1000_ich8lan) {
1da177e4
LT		 3243 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3244 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3245 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3246 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3247 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3248 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
cd94dd0b
AK		 3249 }
3250
1da177e4
LT		 3251 adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3252 adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3253
3254 /* used for adaptive IFS */
3255
3256 hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3257 adapter->stats.tpt += hw->tx_packet_delta;
3258 hw->collision_delta = E1000_READ_REG(hw, COLC);
3259 adapter->stats.colc += hw->collision_delta;
3260
96838a40 3261 if (hw->mac_type >= e1000_82543) {
1da177e4
LT		 3262 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3263 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3264 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3265 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3266 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3267 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3268 }
96838a40 3269 if (hw->mac_type > e1000_82547_rev_2) {
2d7edb92
MC		 3270 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3271 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
cd94dd0b
AK		 3272
3273 if (adapter->hw.mac_type != e1000_ich8lan) {
2d7edb92
MC		 3274 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3275 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3276 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3277 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3278 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3279 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3280 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
cd94dd0b 3281 }
2d7edb92 3282 }
1da177e4
LT		 3283
3284 /* Fill out the OS statistics structure */
3285
3286 adapter->net_stats.rx_packets = adapter->stats.gprc;
3287 adapter->net_stats.tx_packets = adapter->stats.gptc;
3288 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3289 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3290 adapter->net_stats.multicast = adapter->stats.mprc;
3291 adapter->net_stats.collisions = adapter->stats.colc;
3292
3293 /* Rx Errors */
3294
87041639
JK		 3295 /* RLEC on some newer hardware can be incorrect so build
3296 * our own version based on RUC and ROC */
1da177e4
LT		 3297 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3298 adapter->stats.crcerrs + adapter->stats.algnerrc +
87041639
JK		 3299 adapter->stats.ruc + adapter->stats.roc +
3300 adapter->stats.cexterr;
87041639
JK		 3301 adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3302 adapter->stats.roc;
1da177e4
LT		 3303 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3304 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
1da177e4
LT		 3305 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3306
3307 /* Tx Errors */
3308
3309 adapter->net_stats.tx_errors = adapter->stats.ecol +
3310 adapter->stats.latecol;
3311 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3312 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3313 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3314
3315 /* Tx Dropped needs to be maintained elsewhere */
3316
3317 /* Phy Stats */
3318
96838a40
JB		 3319 if (hw->media_type == e1000_media_type_copper) {
3320 if ((adapter->link_speed == SPEED_1000) &&
1da177e4
LT		 3321 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3322 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3323 adapter->phy_stats.idle_errors += phy_tmp;
3324 }
3325
96838a40 3326 if ((hw->mac_type <= e1000_82546) &&
1da177e4
LT		 3327 (hw->phy_type == e1000_phy_m88) &&
3328 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3329 adapter->phy_stats.receive_errors += phy_tmp;
3330 }
3331
3332 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3333}
3334
3335/**
3336 * e1000_intr - Interrupt Handler
3337 * @irq: interrupt number
3338 * @data: pointer to a network interface device structure
3339 * @pt_regs: CPU registers structure
3340 **/
3341
3342static irqreturn_t
3343e1000_intr(int irq, void *data, struct pt_regs *regs)
3344{
3345 struct net_device *netdev = data;
60490fe0 3346 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 3347 struct e1000_hw *hw = &adapter->hw;
87041639 3348 uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
1e613fd9 3349#ifndef CONFIG_E1000_NAPI
581d708e 3350 int i;
1e613fd9
JK		 3351#else
3352 /* Interrupt Auto-Mask...upon reading ICR,
3353 * interrupts are masked. No need for the
3354 * IMC write, but it does mean we should
3355 * account for it ASAP. */
3356 if (likely(hw->mac_type >= e1000_82571))
3357 atomic_inc(&adapter->irq_sem);
be2b28ed 3358#endif
1da177e4 3359
1e613fd9
JK		 3360 if (unlikely(!icr)) {
3361#ifdef CONFIG_E1000_NAPI
3362 if (hw->mac_type >= e1000_82571)
3363 e1000_irq_enable(adapter);
3364#endif
1da177e4 3365 return IRQ_NONE; /* Not our interrupt */
1e613fd9 3366 }
1da177e4 3367
96838a40 3368 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
1da177e4 3369 hw->get_link_status = 1;
87041639
JK		 3370 /* 80003ES2LAN workaround--
3371 * For packet buffer work-around on link down event;
3372 * disable receives here in the ISR and
3373 * reset adapter in watchdog
3374 */
3375 if (netif_carrier_ok(netdev) &&
3376 (adapter->hw.mac_type == e1000_80003es2lan)) {
3377 /* disable receives */
3378 rctl = E1000_READ_REG(hw, RCTL);
3379 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3380 }
1da177e4
LT		 3381 mod_timer(&adapter->watchdog_timer, jiffies);
3382 }
3383
3384#ifdef CONFIG_E1000_NAPI
1e613fd9
JK		 3385 if (unlikely(hw->mac_type < e1000_82571)) {
3386 atomic_inc(&adapter->irq_sem);
3387 E1000_WRITE_REG(hw, IMC, ~0);
3388 E1000_WRITE_FLUSH(hw);
3389 }
581d708e
MC		 3390 if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3391 __netif_rx_schedule(&adapter->polling_netdev[0]);
3392 else
3393 e1000_irq_enable(adapter);
c1605eb3 3394#else
1da177e4 3395 /* Writing IMC and IMS is needed for 82547.
96838a40
JB		 3396 * Due to Hub Link bus being occupied, an interrupt
3397 * de-assertion message is not able to be sent.
3398 * When an interrupt assertion message is generated later,
3399 * two messages are re-ordered and sent out.
3400 * That causes APIC to think 82547 is in de-assertion
3401 * state, while 82547 is in assertion state, resulting
3402 * in dead lock. Writing IMC forces 82547 into
3403 * de-assertion state.
3404 */
3405 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
1da177e4 3406 atomic_inc(&adapter->irq_sem);
2648345f 3407 E1000_WRITE_REG(hw, IMC, ~0);
1da177e4
LT		 3408 }
3409
96838a40
JB		 3410 for (i = 0; i < E1000_MAX_INTR; i++)
3411 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
581d708e 3412 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
1da177e4
LT		 3413 break;
3414
96838a40 3415 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
1da177e4 3416 e1000_irq_enable(adapter);
581d708e 3417
c1605eb3 3418#endif
1da177e4
LT		 3419
3420 return IRQ_HANDLED;
3421}
3422
3423#ifdef CONFIG_E1000_NAPI
3424/**
3425 * e1000_clean - NAPI Rx polling callback
3426 * @adapter: board private structure
3427 **/
3428
3429static int
581d708e 3430e1000_clean(struct net_device *poll_dev, int *budget)
1da177e4 3431{
581d708e
MC		 3432 struct e1000_adapter *adapter;
3433 int work_to_do = min(*budget, poll_dev->quota);
38bd3b26 3434 int tx_cleaned = 0, i = 0, work_done = 0;
581d708e
MC		 3435
3436 /* Must NOT use netdev_priv macro here. */
3437 adapter = poll_dev->priv;
3438
3439 /* Keep link state information with original netdev */
3440 if (!netif_carrier_ok(adapter->netdev))
3441 goto quit_polling;
2648345f 3442
581d708e
MC		 3443 while (poll_dev != &adapter->polling_netdev[i]) {
3444 i++;
5d9428de 3445 BUG_ON(i == adapter->num_rx_queues);
581d708e
MC		 3446 }
3447
8241e35e
JK		 3448 if (likely(adapter->num_tx_queues == 1)) {
3449 /* e1000_clean is called per-cpu. This lock protects
3450 * tx_ring[0] from being cleaned by multiple cpus
3451 * simultaneously. A failure obtaining the lock means
3452 * tx_ring[0] is currently being cleaned anyway. */
3453 if (spin_trylock(&adapter->tx_queue_lock)) {
3454 tx_cleaned = e1000_clean_tx_irq(adapter,
3455 &adapter->tx_ring[0]);
3456 spin_unlock(&adapter->tx_queue_lock);
3457 }
3458 } else
3459 tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3460
581d708e
MC		 3461 adapter->clean_rx(adapter, &adapter->rx_ring[i],
3462 &work_done, work_to_do);
1da177e4
LT		 3463
3464 *budget -= work_done;
581d708e 3465 poll_dev->quota -= work_done;
96838a40 3466
2b02893e 3467 /* If no Tx and not enough Rx work done, exit the polling mode */
96838a40 3468 if ((!tx_cleaned && (work_done == 0)) ||
581d708e
MC		 3469 !netif_running(adapter->netdev)) {
3470quit_polling:
3471 netif_rx_complete(poll_dev);
1da177e4
LT		 3472 e1000_irq_enable(adapter);
3473 return 0;
3474 }
3475
3476 return 1;
3477}
3478
3479#endif
3480/**
3481 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3482 * @adapter: board private structure
3483 **/
3484
3485static boolean_t
581d708e
MC		 3486e1000_clean_tx_irq(struct e1000_adapter *adapter,
3487 struct e1000_tx_ring *tx_ring)
1da177e4 3488{
1da177e4
LT		 3489 struct net_device *netdev = adapter->netdev;
3490 struct e1000_tx_desc *tx_desc, *eop_desc;
3491 struct e1000_buffer *buffer_info;
3492 unsigned int i, eop;
2a1af5d7
JK		 3493#ifdef CONFIG_E1000_NAPI
3494 unsigned int count = 0;
3495#endif
1da177e4
LT		 3496 boolean_t cleaned = FALSE;
3497
3498 i = tx_ring->next_to_clean;
3499 eop = tx_ring->buffer_info[i].next_to_watch;
3500 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3501
581d708e 3502 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
96838a40 3503 for (cleaned = FALSE; !cleaned; ) {
1da177e4
LT		 3504 tx_desc = E1000_TX_DESC(*tx_ring, i);
3505 buffer_info = &tx_ring->buffer_info[i];
3506 cleaned = (i == eop);
3507
fd803241 3508 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
8241e35e 3509 memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
1da177e4 3510
96838a40 3511 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4 3512 }
581d708e 3513
7bfa4816 3514
1da177e4
LT		 3515 eop = tx_ring->buffer_info[i].next_to_watch;
3516 eop_desc = E1000_TX_DESC(*tx_ring, eop);
2a1af5d7
JK		 3517#ifdef CONFIG_E1000_NAPI
3518#define E1000_TX_WEIGHT 64
3519 /* weight of a sort for tx, to avoid endless transmit cleanup */
3520 if (count++ == E1000_TX_WEIGHT) break;
3521#endif
1da177e4
LT		 3522 }
3523
3524 tx_ring->next_to_clean = i;
3525
77b2aad5 3526#define TX_WAKE_THRESHOLD 32
96838a40 3527 if (unlikely(cleaned && netif_queue_stopped(netdev) &&
77b2aad5
AK		 3528 netif_carrier_ok(netdev))) {
3529 spin_lock(&tx_ring->tx_lock);
3530 if (netif_queue_stopped(netdev) &&
3531 (E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))
3532 netif_wake_queue(netdev);
3533 spin_unlock(&tx_ring->tx_lock);
3534 }
2648345f 3535
581d708e 3536 if (adapter->detect_tx_hung) {
2648345f 3537 /* Detect a transmit hang in hardware, this serializes the
1da177e4
LT		 3538 * check with the clearing of time_stamp and movement of i */
3539 adapter->detect_tx_hung = FALSE;
392137fa
JK		 3540 if (tx_ring->buffer_info[eop].dma &&
3541 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
7e6c9861 3542 (adapter->tx_timeout_factor * HZ))
70b8f1e1 3543 && !(E1000_READ_REG(&adapter->hw, STATUS) &
392137fa 3544 E1000_STATUS_TXOFF)) {
70b8f1e1
MC		 3545
3546 /* detected Tx unit hang */
c6963ef5 3547 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
7bfa4816 3548 " Tx Queue <%lu>\n"
70b8f1e1
MC		 3549 " TDH <%x>\n"
3550 " TDT <%x>\n"
3551 " next_to_use <%x>\n"
3552 " next_to_clean <%x>\n"
3553 "buffer_info[next_to_clean]\n"
70b8f1e1
MC		 3554 " time_stamp <%lx>\n"
3555 " next_to_watch <%x>\n"
3556 " jiffies <%lx>\n"
3557 " next_to_watch.status <%x>\n",
7bfa4816
JK		 3558 (unsigned long)((tx_ring - adapter->tx_ring) /
3559 sizeof(struct e1000_tx_ring)),
581d708e
MC		 3560 readl(adapter->hw.hw_addr + tx_ring->tdh),
3561 readl(adapter->hw.hw_addr + tx_ring->tdt),
70b8f1e1 3562 tx_ring->next_to_use,
392137fa
JK		 3563 tx_ring->next_to_clean,
3564 tx_ring->buffer_info[eop].time_stamp,
70b8f1e1
MC		 3565 eop,
3566 jiffies,
3567 eop_desc->upper.fields.status);
1da177e4 3568 netif_stop_queue(netdev);
70b8f1e1 3569 }
1da177e4 3570 }
1da177e4
LT		 3571 return cleaned;
3572}
3573
3574/**
3575 * e1000_rx_checksum - Receive Checksum Offload for 82543
2d7edb92
MC		 3576 * @adapter: board private structure
3577 * @status_err: receive descriptor status and error fields
3578 * @csum: receive descriptor csum field
3579 * @sk_buff: socket buffer with received data
1da177e4
LT		 3580 **/
3581
e619d523 3582static void
1da177e4 3583e1000_rx_checksum(struct e1000_adapter *adapter,
2d7edb92
MC		 3584 uint32_t status_err, uint32_t csum,
3585 struct sk_buff *skb)
1da177e4 3586{
2d7edb92
MC		 3587 uint16_t status = (uint16_t)status_err;
3588 uint8_t errors = (uint8_t)(status_err >> 24);
3589 skb->ip_summed = CHECKSUM_NONE;
3590
1da177e4 3591 /* 82543 or newer only */
96838a40 3592 if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
1da177e4 3593 /* Ignore Checksum bit is set */
96838a40 3594 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
2d7edb92 3595 /* TCP/UDP checksum error bit is set */
96838a40 3596 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
1da177e4 3597 /* let the stack verify checksum errors */
1da177e4 3598 adapter->hw_csum_err++;
2d7edb92
MC		 3599 return;
3600 }
3601 /* TCP/UDP Checksum has not been calculated */
96838a40
JB		 3602 if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3603 if (!(status & E1000_RXD_STAT_TCPCS))
2d7edb92 3604 return;
1da177e4 3605 } else {
96838a40 3606 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
2d7edb92
MC		 3607 return;
3608 }
3609 /* It must be a TCP or UDP packet with a valid checksum */
3610 if (likely(status & E1000_RXD_STAT_TCPCS)) {
1da177e4
LT		 3611 /* TCP checksum is good */
3612 skb->ip_summed = CHECKSUM_UNNECESSARY;
2d7edb92
MC		 3613 } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3614 /* IP fragment with UDP payload */
3615 /* Hardware complements the payload checksum, so we undo it
3616 * and then put the value in host order for further stack use.
3617 */
3618 csum = ntohl(csum ^ 0xFFFF);
3619 skb->csum = csum;
3620 skb->ip_summed = CHECKSUM_HW;
1da177e4 3621 }
2d7edb92 3622 adapter->hw_csum_good++;
1da177e4
LT		 3623}
3624
3625/**
2d7edb92 3626 * e1000_clean_rx_irq - Send received data up the network stack; legacy
1da177e4
LT		 3627 * @adapter: board private structure
3628 **/
3629
3630static boolean_t
3631#ifdef CONFIG_E1000_NAPI
581d708e
MC		 3632e1000_clean_rx_irq(struct e1000_adapter *adapter,
3633 struct e1000_rx_ring *rx_ring,
3634 int *work_done, int work_to_do)
1da177e4 3635#else
581d708e
MC		 3636e1000_clean_rx_irq(struct e1000_adapter *adapter,
3637 struct e1000_rx_ring *rx_ring)
1da177e4
LT		 3638#endif
3639{
1da177e4
LT		 3640 struct net_device *netdev = adapter->netdev;
3641 struct pci_dev *pdev = adapter->pdev;
86c3d59f
JB		 3642 struct e1000_rx_desc *rx_desc, *next_rxd;
3643 struct e1000_buffer *buffer_info, *next_buffer;
1da177e4
LT		 3644 unsigned long flags;
3645 uint32_t length;
3646 uint8_t last_byte;
3647 unsigned int i;
72d64a43 3648 int cleaned_count = 0;
a1415ee6 3649 boolean_t cleaned = FALSE;
1da177e4
LT		 3650
3651 i = rx_ring->next_to_clean;
3652 rx_desc = E1000_RX_DESC(*rx_ring, i);
b92ff8ee 3653 buffer_info = &rx_ring->buffer_info[i];
1da177e4 3654
b92ff8ee 3655 while (rx_desc->status & E1000_RXD_STAT_DD) {
24f476ee 3656 struct sk_buff *skb;
a292ca6e 3657 u8 status;
1da177e4 3658#ifdef CONFIG_E1000_NAPI
96838a40 3659 if (*work_done >= work_to_do)
1da177e4
LT		 3660 break;
3661 (*work_done)++;
3662#endif
a292ca6e 3663 status = rx_desc->status;
b92ff8ee 3664 skb = buffer_info->skb;
86c3d59f
JB		 3665 buffer_info->skb = NULL;
3666
30320be8
JK		 3667 prefetch(skb->data - NET_IP_ALIGN);
3668
86c3d59f
JB		 3669 if (++i == rx_ring->count) i = 0;
3670 next_rxd = E1000_RX_DESC(*rx_ring, i);
30320be8
JK		 3671 prefetch(next_rxd);
3672
86c3d59f 3673 next_buffer = &rx_ring->buffer_info[i];
86c3d59f 3674
72d64a43
JK		 3675 cleaned = TRUE;
3676 cleaned_count++;
a292ca6e
JK		 3677 pci_unmap_single(pdev,
3678 buffer_info->dma,
3679 buffer_info->length,
1da177e4
LT		 3680 PCI_DMA_FROMDEVICE);
3681
1da177e4
LT		 3682 length = le16_to_cpu(rx_desc->length);
3683
a1415ee6
JK		 3684 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3685 /* All receives must fit into a single buffer */
3686 E1000_DBG("%s: Receive packet consumed multiple"
3687 " buffers\n", netdev->name);
864c4e45
AK		 3688 /* recycle */
3689 buffer_info-> skb = skb;
1da177e4
LT		 3690 goto next_desc;
3691 }
3692
96838a40 3693 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
1da177e4 3694 last_byte = *(skb->data + length - 1);
b92ff8ee 3695 if (TBI_ACCEPT(&adapter->hw, status,
1da177e4
LT		 3696 rx_desc->errors, length, last_byte)) {
3697 spin_lock_irqsave(&adapter->stats_lock, flags);
a292ca6e
JK		 3698 e1000_tbi_adjust_stats(&adapter->hw,
3699 &adapter->stats,
1da177e4
LT		 3700 length, skb->data);
3701 spin_unlock_irqrestore(&adapter->stats_lock,
3702 flags);
3703 length--;
3704 } else {
9e2feace
AK		 3705 /* recycle */
3706 buffer_info->skb = skb;
1da177e4
LT		 3707 goto next_desc;
3708 }
1cb5821f 3709 }
1da177e4 3710
a292ca6e
JK		 3711 /* code added for copybreak, this should improve
3712 * performance for small packets with large amounts
3713 * of reassembly being done in the stack */
3714#define E1000_CB_LENGTH 256
a1415ee6 3715 if (length < E1000_CB_LENGTH) {
a292ca6e
JK		 3716 struct sk_buff *new_skb =
3717 dev_alloc_skb(length + NET_IP_ALIGN);
3718 if (new_skb) {
3719 skb_reserve(new_skb, NET_IP_ALIGN);
3720 new_skb->dev = netdev;
3721 memcpy(new_skb->data - NET_IP_ALIGN,
3722 skb->data - NET_IP_ALIGN,
3723 length + NET_IP_ALIGN);
3724 /* save the skb in buffer_info as good */
3725 buffer_info->skb = skb;
3726 skb = new_skb;
3727 skb_put(skb, length);
3728 }
a1415ee6
JK		 3729 } else
3730 skb_put(skb, length);
a292ca6e
JK		 3731
3732 /* end copybreak code */
1da177e4
LT		 3733
3734 /* Receive Checksum Offload */
a292ca6e
JK		 3735 e1000_rx_checksum(adapter,
3736 (uint32_t)(status) |
2d7edb92 3737 ((uint32_t)(rx_desc->errors) << 24),
c3d7a3a4 3738 le16_to_cpu(rx_desc->csum), skb);
96838a40 3739
1da177e4
LT		 3740 skb->protocol = eth_type_trans(skb, netdev);
3741#ifdef CONFIG_E1000_NAPI
96838a40 3742 if (unlikely(adapter->vlgrp &&
a292ca6e 3743 (status & E1000_RXD_STAT_VP))) {
1da177e4 3744 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2d7edb92
MC		 3745 le16_to_cpu(rx_desc->special) &
3746 E1000_RXD_SPC_VLAN_MASK);
1da177e4
LT		 3747 } else {
3748 netif_receive_skb(skb);
3749 }
3750#else /* CONFIG_E1000_NAPI */
96838a40 3751 if (unlikely(adapter->vlgrp &&
b92ff8ee 3752 (status & E1000_RXD_STAT_VP))) {
1da177e4
LT		 3753 vlan_hwaccel_rx(skb, adapter->vlgrp,
3754 le16_to_cpu(rx_desc->special) &
3755 E1000_RXD_SPC_VLAN_MASK);
3756 } else {
3757 netif_rx(skb);
3758 }
3759#endif /* CONFIG_E1000_NAPI */
3760 netdev->last_rx = jiffies;
3761
3762next_desc:
3763 rx_desc->status = 0;
1da177e4 3764
72d64a43
JK		 3765 /* return some buffers to hardware, one at a time is too slow */
3766 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3767 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3768 cleaned_count = 0;
3769 }
3770
30320be8 3771 /* use prefetched values */
86c3d59f
JB		 3772 rx_desc = next_rxd;
3773 buffer_info = next_buffer;
1da177e4 3774 }
1da177e4 3775 rx_ring->next_to_clean = i;
72d64a43
JK		 3776
3777 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3778 if (cleaned_count)
3779 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
2d7edb92
MC		 3780
3781 return cleaned;
3782}
3783
3784/**
3785 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3786 * @adapter: board private structure
3787 **/
3788
3789static boolean_t
3790#ifdef CONFIG_E1000_NAPI
581d708e
MC		 3791e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3792 struct e1000_rx_ring *rx_ring,
3793 int *work_done, int work_to_do)
2d7edb92 3794#else
581d708e
MC		 3795e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3796 struct e1000_rx_ring *rx_ring)
2d7edb92
MC		 3797#endif
3798{
86c3d59f 3799 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
2d7edb92
MC		 3800 struct net_device *netdev = adapter->netdev;
3801 struct pci_dev *pdev = adapter->pdev;
86c3d59f 3802 struct e1000_buffer *buffer_info, *next_buffer;
2d7edb92
MC		 3803 struct e1000_ps_page *ps_page;
3804 struct e1000_ps_page_dma *ps_page_dma;
24f476ee 3805 struct sk_buff *skb;
2d7edb92
MC		 3806 unsigned int i, j;
3807 uint32_t length, staterr;
72d64a43 3808 int cleaned_count = 0;
2d7edb92
MC		 3809 boolean_t cleaned = FALSE;
3810
3811 i = rx_ring->next_to_clean;
3812 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
683a38f3 3813 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
9e2feace 3814 buffer_info = &rx_ring->buffer_info[i];
2d7edb92 3815
96838a40 3816 while (staterr & E1000_RXD_STAT_DD) {
2d7edb92
MC		 3817 ps_page = &rx_ring->ps_page[i];
3818 ps_page_dma = &rx_ring->ps_page_dma[i];
3819#ifdef CONFIG_E1000_NAPI
96838a40 3820 if (unlikely(*work_done >= work_to_do))
2d7edb92
MC		 3821 break;
3822 (*work_done)++;
3823#endif
86c3d59f
JB		 3824 skb = buffer_info->skb;
3825
30320be8
JK		 3826 /* in the packet split case this is header only */
3827 prefetch(skb->data - NET_IP_ALIGN);
3828
86c3d59f
JB		 3829 if (++i == rx_ring->count) i = 0;
3830 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
30320be8
JK		 3831 prefetch(next_rxd);
3832
86c3d59f 3833 next_buffer = &rx_ring->buffer_info[i];
86c3d59f 3834
2d7edb92 3835 cleaned = TRUE;
72d64a43 3836 cleaned_count++;
2d7edb92
MC		 3837 pci_unmap_single(pdev, buffer_info->dma,
3838 buffer_info->length,
3839 PCI_DMA_FROMDEVICE);
3840
96838a40 3841 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
2d7edb92
MC		 3842 E1000_DBG("%s: Packet Split buffers didn't pick up"
3843 " the full packet\n", netdev->name);
3844 dev_kfree_skb_irq(skb);
3845 goto next_desc;
3846 }
1da177e4 3847
96838a40 3848 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
2d7edb92
MC		 3849 dev_kfree_skb_irq(skb);
3850 goto next_desc;
3851 }
3852
3853 length = le16_to_cpu(rx_desc->wb.middle.length0);
3854
96838a40 3855 if (unlikely(!length)) {
2d7edb92
MC		 3856 E1000_DBG("%s: Last part of the packet spanning"
3857 " multiple descriptors\n", netdev->name);
3858 dev_kfree_skb_irq(skb);
3859 goto next_desc;
3860 }
3861
3862 /* Good Receive */
3863 skb_put(skb, length);
3864
dc7c6add
JK		 3865 {
3866 /* this looks ugly, but it seems compiler issues make it
3867 more efficient than reusing j */
3868 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
3869
3870 /* page alloc/put takes too long and effects small packet
3871 * throughput, so unsplit small packets and save the alloc/put*/
9e2feace 3872 if (l1 && ((length + l1) <= adapter->rx_ps_bsize0)) {
dc7c6add 3873 u8 *vaddr;
76c224bc 3874 /* there is no documentation about how to call
dc7c6add
JK		 3875 * kmap_atomic, so we can't hold the mapping
3876 * very long */
3877 pci_dma_sync_single_for_cpu(pdev,
3878 ps_page_dma->ps_page_dma[0],
3879 PAGE_SIZE,
3880 PCI_DMA_FROMDEVICE);
3881 vaddr = kmap_atomic(ps_page->ps_page[0],
3882 KM_SKB_DATA_SOFTIRQ);
3883 memcpy(skb->tail, vaddr, l1);
3884 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
3885 pci_dma_sync_single_for_device(pdev,
3886 ps_page_dma->ps_page_dma[0],
3887 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3888 skb_put(skb, l1);
3889 length += l1;
3890 goto copydone;
3891 } /* if */
3892 }
3893
96838a40 3894 for (j = 0; j < adapter->rx_ps_pages; j++) {
30320be8 3895 if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
2d7edb92 3896 break;
2d7edb92
MC		 3897 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3898 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3899 ps_page_dma->ps_page_dma[j] = 0;
329bfd0b
JK		 3900 skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
3901 length);
2d7edb92 3902 ps_page->ps_page[j] = NULL;
2d7edb92
MC		 3903 skb->len += length;
3904 skb->data_len += length;
5d51b80f 3905 skb->truesize += length;
2d7edb92
MC		 3906 }
3907
dc7c6add 3908copydone:
2d7edb92 3909 e1000_rx_checksum(adapter, staterr,
c3d7a3a4 3910 le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
2d7edb92
MC		 3911 skb->protocol = eth_type_trans(skb, netdev);
3912
96838a40 3913 if (likely(rx_desc->wb.upper.header_status &
c3d7a3a4 3914 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
e4c811c9 3915 adapter->rx_hdr_split++;
2d7edb92 3916#ifdef CONFIG_E1000_NAPI
96838a40 3917 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
2d7edb92 3918 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
683a38f3
MC		 3919 le16_to_cpu(rx_desc->wb.middle.vlan) &
3920 E1000_RXD_SPC_VLAN_MASK);
2d7edb92
MC		 3921 } else {
3922 netif_receive_skb(skb);
3923 }
3924#else /* CONFIG_E1000_NAPI */
96838a40 3925 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
2d7edb92 3926 vlan_hwaccel_rx(skb, adapter->vlgrp,
683a38f3
MC		 3927 le16_to_cpu(rx_desc->wb.middle.vlan) &
3928 E1000_RXD_SPC_VLAN_MASK);
2d7edb92
MC		 3929 } else {
3930 netif_rx(skb);
3931 }
3932#endif /* CONFIG_E1000_NAPI */
3933 netdev->last_rx = jiffies;
3934
3935next_desc:
c3d7a3a4 3936 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
2d7edb92 3937 buffer_info->skb = NULL;
2d7edb92 3938
72d64a43
JK		 3939 /* return some buffers to hardware, one at a time is too slow */
3940 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3941 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3942 cleaned_count = 0;
3943 }
3944
30320be8 3945 /* use prefetched values */
86c3d59f
JB		 3946 rx_desc = next_rxd;
3947 buffer_info = next_buffer;
3948
683a38f3 3949 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
2d7edb92
MC		 3950 }
3951 rx_ring->next_to_clean = i;
72d64a43
JK		 3952
3953 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3954 if (cleaned_count)
3955 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
1da177e4
LT		 3956
3957 return cleaned;
3958}
3959
3960/**
2d7edb92 3961 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
1da177e4
LT		 3962 * @adapter: address of board private structure
3963 **/
3964
3965static void
581d708e 3966e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
72d64a43 3967 struct e1000_rx_ring *rx_ring,
a292ca6e 3968 int cleaned_count)
1da177e4 3969{
1da177e4
LT		 3970 struct net_device *netdev = adapter->netdev;
3971 struct pci_dev *pdev = adapter->pdev;
3972 struct e1000_rx_desc *rx_desc;
3973 struct e1000_buffer *buffer_info;
3974 struct sk_buff *skb;
2648345f
MC		 3975 unsigned int i;
3976 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
1da177e4
LT		 3977
3978 i = rx_ring->next_to_use;
3979 buffer_info = &rx_ring->buffer_info[i];
3980
a292ca6e
JK		 3981 while (cleaned_count--) {
3982 if (!(skb = buffer_info->skb))
3983 skb = dev_alloc_skb(bufsz);
3984 else {
3985 skb_trim(skb, 0);
3986 goto map_skb;
3987 }
3988
96838a40 3989 if (unlikely(!skb)) {
1da177e4 3990 /* Better luck next round */
72d64a43 3991 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 3992 break;
3993 }
3994
2648345f 3995 /* Fix for errata 23, can't cross 64kB boundary */
1da177e4
LT		 3996 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3997 struct sk_buff *oldskb = skb;
2648345f
MC		 3998 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3999 "at %p\n", bufsz, skb->data);
4000 /* Try again, without freeing the previous */
1da177e4 4001 skb = dev_alloc_skb(bufsz);
2648345f 4002 /* Failed allocation, critical failure */
1da177e4
LT		 4003 if (!skb) {
4004 dev_kfree_skb(oldskb);
4005 break;
4006 }
2648345f 4007
1da177e4
LT		 4008 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4009 /* give up */
4010 dev_kfree_skb(skb);
4011 dev_kfree_skb(oldskb);
4012 break; /* while !buffer_info->skb */
4013 } else {
2648345f 4014 /* Use new allocation */
1da177e4
LT		 4015 dev_kfree_skb(oldskb);
4016 }
4017 }
1da177e4
LT		 4018 /* Make buffer alignment 2 beyond a 16 byte boundary
4019 * this will result in a 16 byte aligned IP header after
4020 * the 14 byte MAC header is removed
4021 */
4022 skb_reserve(skb, NET_IP_ALIGN);
4023
4024 skb->dev = netdev;
4025
4026 buffer_info->skb = skb;
4027 buffer_info->length = adapter->rx_buffer_len;
a292ca6e 4028map_skb:
1da177e4
LT		 4029 buffer_info->dma = pci_map_single(pdev,
4030 skb->data,
4031 adapter->rx_buffer_len,
4032 PCI_DMA_FROMDEVICE);
4033
2648345f
MC		 4034 /* Fix for errata 23, can't cross 64kB boundary */
4035 if (!e1000_check_64k_bound(adapter,
4036 (void *)(unsigned long)buffer_info->dma,
4037 adapter->rx_buffer_len)) {
4038 DPRINTK(RX_ERR, ERR,
4039 "dma align check failed: %u bytes at %p\n",
4040 adapter->rx_buffer_len,
4041 (void *)(unsigned long)buffer_info->dma);
1da177e4
LT		 4042 dev_kfree_skb(skb);
4043 buffer_info->skb = NULL;
4044
2648345f 4045 pci_unmap_single(pdev, buffer_info->dma,
1da177e4
LT		 4046 adapter->rx_buffer_len,
4047 PCI_DMA_FROMDEVICE);
4048
4049 break; /* while !buffer_info->skb */
4050 }
1da177e4
LT		 4051 rx_desc = E1000_RX_DESC(*rx_ring, i);
4052 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4053
96838a40
JB		 4054 if (unlikely(++i == rx_ring->count))
4055 i = 0;
1da177e4
LT		 4056 buffer_info = &rx_ring->buffer_info[i];
4057 }
4058
b92ff8ee
JB		 4059 if (likely(rx_ring->next_to_use != i)) {
4060 rx_ring->next_to_use = i;
4061 if (unlikely(i-- == 0))
4062 i = (rx_ring->count - 1);
4063
4064 /* Force memory writes to complete before letting h/w
4065 * know there are new descriptors to fetch. (Only
4066 * applicable for weak-ordered memory model archs,
4067 * such as IA-64). */
4068 wmb();
4069 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4070 }
1da177e4
LT		 4071}
4072
2d7edb92
MC		 4073/**
4074 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4075 * @adapter: address of board private structure
4076 **/
4077
4078static void
581d708e 4079e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
72d64a43
JK		 4080 struct e1000_rx_ring *rx_ring,
4081 int cleaned_count)
2d7edb92 4082{
2d7edb92
MC		 4083 struct net_device *netdev = adapter->netdev;
4084 struct pci_dev *pdev = adapter->pdev;
4085 union e1000_rx_desc_packet_split *rx_desc;
4086 struct e1000_buffer *buffer_info;
4087 struct e1000_ps_page *ps_page;
4088 struct e1000_ps_page_dma *ps_page_dma;
4089 struct sk_buff *skb;
4090 unsigned int i, j;
4091
4092 i = rx_ring->next_to_use;
4093 buffer_info = &rx_ring->buffer_info[i];
4094 ps_page = &rx_ring->ps_page[i];
4095 ps_page_dma = &rx_ring->ps_page_dma[i];
4096
72d64a43 4097 while (cleaned_count--) {
2d7edb92
MC		 4098 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4099
96838a40 4100 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
e4c811c9
MC		 4101 if (j < adapter->rx_ps_pages) {
4102 if (likely(!ps_page->ps_page[j])) {
4103 ps_page->ps_page[j] =
4104 alloc_page(GFP_ATOMIC);
b92ff8ee
JB		 4105 if (unlikely(!ps_page->ps_page[j])) {
4106 adapter->alloc_rx_buff_failed++;
e4c811c9 4107 goto no_buffers;
b92ff8ee 4108 }
e4c811c9
MC		 4109 ps_page_dma->ps_page_dma[j] =
4110 pci_map_page(pdev,
4111 ps_page->ps_page[j],
4112 0, PAGE_SIZE,
4113 PCI_DMA_FROMDEVICE);
4114 }
4115 /* Refresh the desc even if buffer_addrs didn't
96838a40 4116 * change because each write-back erases
e4c811c9
MC		 4117 * this info.
4118 */
4119 rx_desc->read.buffer_addr[j+1] =
4120 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4121 } else
4122 rx_desc->read.buffer_addr[j+1] = ~0;
2d7edb92
MC		 4123 }
4124
4125 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4126
b92ff8ee
JB		 4127 if (unlikely(!skb)) {
4128 adapter->alloc_rx_buff_failed++;
2d7edb92 4129 break;
b92ff8ee 4130 }
2d7edb92
MC		 4131
4132 /* Make buffer alignment 2 beyond a 16 byte boundary
4133 * this will result in a 16 byte aligned IP header after
4134 * the 14 byte MAC header is removed
4135 */
4136 skb_reserve(skb, NET_IP_ALIGN);
4137
4138 skb->dev = netdev;
4139
4140 buffer_info->skb = skb;
4141 buffer_info->length = adapter->rx_ps_bsize0;
4142 buffer_info->dma = pci_map_single(pdev, skb->data,
4143 adapter->rx_ps_bsize0,
4144 PCI_DMA_FROMDEVICE);
4145
4146 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4147
96838a40 4148 if (unlikely(++i == rx_ring->count)) i = 0;
2d7edb92
MC		 4149 buffer_info = &rx_ring->buffer_info[i];
4150 ps_page = &rx_ring->ps_page[i];
4151 ps_page_dma = &rx_ring->ps_page_dma[i];
4152 }
4153
4154no_buffers:
b92ff8ee
JB		 4155 if (likely(rx_ring->next_to_use != i)) {
4156 rx_ring->next_to_use = i;
4157 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4158
4159 /* Force memory writes to complete before letting h/w
4160 * know there are new descriptors to fetch. (Only
4161 * applicable for weak-ordered memory model archs,
4162 * such as IA-64). */
4163 wmb();
4164 /* Hardware increments by 16 bytes, but packet split
4165 * descriptors are 32 bytes...so we increment tail
4166 * twice as much.
4167 */
4168 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4169 }
2d7edb92
MC		 4170}
4171
1da177e4
LT		 4172/**
4173 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4174 * @adapter:
4175 **/
4176
4177static void
4178e1000_smartspeed(struct e1000_adapter *adapter)
4179{
4180 uint16_t phy_status;
4181 uint16_t phy_ctrl;
4182
96838a40 4183 if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
1da177e4
LT		 4184 !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4185 return;
4186
96838a40 4187 if (adapter->smartspeed == 0) {
1da177e4
LT		 4188 /* If Master/Slave config fault is asserted twice,
4189 * we assume back-to-back */
4190 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
96838a40 4191 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
1da177e4 4192 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
96838a40 4193 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
1da177e4 4194 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
96838a40 4195 if (phy_ctrl & CR_1000T_MS_ENABLE) {
1da177e4
LT		 4196 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4197 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4198 phy_ctrl);
4199 adapter->smartspeed++;
96838a40 4200 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
1da177e4
LT		 4201 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4202 &phy_ctrl)) {
4203 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4204 MII_CR_RESTART_AUTO_NEG);
4205 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4206 phy_ctrl);
4207 }
4208 }
4209 return;
96838a40 4210 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
1da177e4
LT		 4211 /* If still no link, perhaps using 2/3 pair cable */
4212 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4213 phy_ctrl |= CR_1000T_MS_ENABLE;
4214 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
96838a40 4215 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
1da177e4
LT		 4216 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4217 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4218 MII_CR_RESTART_AUTO_NEG);
4219 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4220 }
4221 }
4222 /* Restart process after E1000_SMARTSPEED_MAX iterations */
96838a40 4223 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
1da177e4
LT		 4224 adapter->smartspeed = 0;
4225}
4226
4227/**
4228 * e1000_ioctl -
4229 * @netdev:
4230 * @ifreq:
4231 * @cmd:
4232 **/
4233
4234static int
4235e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4236{
4237 switch (cmd) {
4238 case SIOCGMIIPHY:
4239 case SIOCGMIIREG:
4240 case SIOCSMIIREG:
4241 return e1000_mii_ioctl(netdev, ifr, cmd);
4242 default:
4243 return -EOPNOTSUPP;
4244 }
4245}
4246
4247/**
4248 * e1000_mii_ioctl -
4249 * @netdev:
4250 * @ifreq:
4251 * @cmd:
4252 **/
4253
4254static int
4255e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4256{
60490fe0 4257 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 4258 struct mii_ioctl_data *data = if_mii(ifr);
4259 int retval;
4260 uint16_t mii_reg;
4261 uint16_t spddplx;
97876fc6 4262 unsigned long flags;
1da177e4 4263
96838a40 4264 if (adapter->hw.media_type != e1000_media_type_copper)
1da177e4
LT		 4265 return -EOPNOTSUPP;
4266
4267 switch (cmd) {
4268 case SIOCGMIIPHY:
4269 data->phy_id = adapter->hw.phy_addr;
4270 break;
4271 case SIOCGMIIREG:
96838a40 4272 if (!capable(CAP_NET_ADMIN))
1da177e4 4273 return -EPERM;
97876fc6 4274 spin_lock_irqsave(&adapter->stats_lock, flags);
96838a40 4275 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
97876fc6
MC		 4276 &data->val_out)) {
4277 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4 4278 return -EIO;
97876fc6
MC		 4279 }
4280 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4
LT		 4281 break;
4282 case SIOCSMIIREG:
96838a40 4283 if (!capable(CAP_NET_ADMIN))
1da177e4 4284 return -EPERM;
96838a40 4285 if (data->reg_num & ~(0x1F))
1da177e4
LT		 4286 return -EFAULT;
4287 mii_reg = data->val_in;
97876fc6 4288 spin_lock_irqsave(&adapter->stats_lock, flags);
96838a40 4289 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
97876fc6
MC		 4290 mii_reg)) {
4291 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4 4292 return -EIO;
97876fc6 4293 }
dc86d32a 4294 if (adapter->hw.media_type == e1000_media_type_copper) {
1da177e4
LT		 4295 switch (data->reg_num) {
4296 case PHY_CTRL:
96838a40 4297 if (mii_reg & MII_CR_POWER_DOWN)
1da177e4 4298 break;
96838a40 4299 if (mii_reg & MII_CR_AUTO_NEG_EN) {
1da177e4
LT		 4300 adapter->hw.autoneg = 1;
4301 adapter->hw.autoneg_advertised = 0x2F;
4302 } else {
4303 if (mii_reg & 0x40)
4304 spddplx = SPEED_1000;
4305 else if (mii_reg & 0x2000)
4306 spddplx = SPEED_100;
4307 else
4308 spddplx = SPEED_10;
4309 spddplx += (mii_reg & 0x100)
cb764326
JK		 4310 ? DUPLEX_FULL :
4311 DUPLEX_HALF;
1da177e4
LT		 4312 retval = e1000_set_spd_dplx(adapter,
4313 spddplx);
96838a40 4314 if (retval) {
97876fc6 4315 spin_unlock_irqrestore(
96838a40 4316 &adapter->stats_lock,
97876fc6 4317 flags);
1da177e4 4318 return retval;
97876fc6 4319 }
1da177e4 4320 }
2db10a08
AK		 4321 if (netif_running(adapter->netdev))
4322 e1000_reinit_locked(adapter);
4323 else
1da177e4
LT		 4324 e1000_reset(adapter);
4325 break;
4326 case M88E1000_PHY_SPEC_CTRL:
4327 case M88E1000_EXT_PHY_SPEC_CTRL:
96838a40 4328 if (e1000_phy_reset(&adapter->hw)) {
97876fc6
MC		 4329 spin_unlock_irqrestore(
4330 &adapter->stats_lock, flags);
1da177e4 4331 return -EIO;
97876fc6 4332 }
1da177e4
LT		 4333 break;
4334 }
4335 } else {
4336 switch (data->reg_num) {
4337 case PHY_CTRL:
96838a40 4338 if (mii_reg & MII_CR_POWER_DOWN)
1da177e4 4339 break;
2db10a08
AK		 4340 if (netif_running(adapter->netdev))
4341 e1000_reinit_locked(adapter);
4342 else
1da177e4
LT		 4343 e1000_reset(adapter);
4344 break;
4345 }
4346 }
97876fc6 4347 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4
LT		 4348 break;
4349 default:
4350 return -EOPNOTSUPP;
4351 }
4352 return E1000_SUCCESS;
4353}
4354
4355void
4356e1000_pci_set_mwi(struct e1000_hw *hw)
4357{
4358 struct e1000_adapter *adapter = hw->back;
2648345f 4359 int ret_val = pci_set_mwi(adapter->pdev);
1da177e4 4360
96838a40 4361 if (ret_val)
2648345f 4362 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
1da177e4
LT		 4363}
4364
4365void
4366e1000_pci_clear_mwi(struct e1000_hw *hw)
4367{
4368 struct e1000_adapter *adapter = hw->back;
4369
4370 pci_clear_mwi(adapter->pdev);
4371}
4372
4373void
4374e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4375{
4376 struct e1000_adapter *adapter = hw->back;
4377
4378 pci_read_config_word(adapter->pdev, reg, value);
4379}
4380
4381void
4382e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4383{
4384 struct e1000_adapter *adapter = hw->back;
4385
4386 pci_write_config_word(adapter->pdev, reg, *value);
4387}
4388
4389uint32_t
4390e1000_io_read(struct e1000_hw *hw, unsigned long port)
4391{
4392 return inl(port);
4393}
4394
4395void
4396e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4397{
4398 outl(value, port);
4399}
4400
4401static void
4402e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4403{
60490fe0 4404 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 4405 uint32_t ctrl, rctl;
4406
4407 e1000_irq_disable(adapter);
4408 adapter->vlgrp = grp;
4409
96838a40 4410 if (grp) {
1da177e4
LT		 4411 /* enable VLAN tag insert/strip */
4412 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4413 ctrl |= E1000_CTRL_VME;
4414 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4415
cd94dd0b 4416 if (adapter->hw.mac_type != e1000_ich8lan) {
1da177e4
LT		 4417 /* enable VLAN receive filtering */
4418 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4419 rctl |= E1000_RCTL_VFE;
4420 rctl &= ~E1000_RCTL_CFIEN;
4421 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2d7edb92 4422 e1000_update_mng_vlan(adapter);
cd94dd0b 4423 }
1da177e4
LT		 4424 } else {
4425 /* disable VLAN tag insert/strip */
4426 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4427 ctrl &= ~E1000_CTRL_VME;
4428 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4429
cd94dd0b 4430 if (adapter->hw.mac_type != e1000_ich8lan) {
1da177e4
LT		 4431 /* disable VLAN filtering */
4432 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4433 rctl &= ~E1000_RCTL_VFE;
4434 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
96838a40 4435 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
2d7edb92
MC		 4436 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4437 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4438 }
cd94dd0b 4439 }
1da177e4
LT		 4440 }
4441
4442 e1000_irq_enable(adapter);
4443}
4444
4445static void
4446e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4447{
60490fe0 4448 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 4449 uint32_t vfta, index;
96838a40
JB		 4450
4451 if ((adapter->hw.mng_cookie.status &
4452 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4453 (vid == adapter->mng_vlan_id))
2d7edb92 4454 return;
1da177e4
LT		 4455 /* add VID to filter table */
4456 index = (vid >> 5) & 0x7F;
4457 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4458 vfta |= (1 << (vid & 0x1F));
4459 e1000_write_vfta(&adapter->hw, index, vfta);
4460}
4461
4462static void
4463e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4464{
60490fe0 4465 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 4466 uint32_t vfta, index;
4467
4468 e1000_irq_disable(adapter);
4469
96838a40 4470 if (adapter->vlgrp)
1da177e4
LT		 4471 adapter->vlgrp->vlan_devices[vid] = NULL;
4472
4473 e1000_irq_enable(adapter);
4474
96838a40
JB		 4475 if ((adapter->hw.mng_cookie.status &
4476 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
ff147013
JK		 4477 (vid == adapter->mng_vlan_id)) {
4478 /* release control to f/w */
4479 e1000_release_hw_control(adapter);
2d7edb92 4480 return;
ff147013
JK		 4481 }
4482
1da177e4
LT		 4483 /* remove VID from filter table */
4484 index = (vid >> 5) & 0x7F;
4485 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4486 vfta &= ~(1 << (vid & 0x1F));
4487 e1000_write_vfta(&adapter->hw, index, vfta);
4488}
4489
4490static void
4491e1000_restore_vlan(struct e1000_adapter *adapter)
4492{
4493 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4494
96838a40 4495 if (adapter->vlgrp) {
1da177e4 4496 uint16_t vid;
96838a40
JB		 4497 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4498 if (!adapter->vlgrp->vlan_devices[vid])
1da177e4
LT		 4499 continue;
4500 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4501 }
4502 }
4503}
4504
4505int
4506e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4507{
4508 adapter->hw.autoneg = 0;
4509
6921368f 4510 /* Fiber NICs only allow 1000 gbps Full duplex */
96838a40 4511 if ((adapter->hw.media_type == e1000_media_type_fiber) &&
6921368f
MC		 4512 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4513 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4514 return -EINVAL;
4515 }
4516
96838a40 4517 switch (spddplx) {
1da177e4
LT		 4518 case SPEED_10 + DUPLEX_HALF:
4519 adapter->hw.forced_speed_duplex = e1000_10_half;
4520 break;
4521 case SPEED_10 + DUPLEX_FULL:
4522 adapter->hw.forced_speed_duplex = e1000_10_full;
4523 break;
4524 case SPEED_100 + DUPLEX_HALF:
4525 adapter->hw.forced_speed_duplex = e1000_100_half;
4526 break;
4527 case SPEED_100 + DUPLEX_FULL:
4528 adapter->hw.forced_speed_duplex = e1000_100_full;
4529 break;
4530 case SPEED_1000 + DUPLEX_FULL:
4531 adapter->hw.autoneg = 1;
4532 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4533 break;
4534 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4535 default:
2648345f 4536 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
1da177e4
LT		 4537 return -EINVAL;
4538 }
4539 return 0;
4540}
4541
b6a1d5f8 4542#ifdef CONFIG_PM
0f15a8fa
JK		 4543/* Save/restore 16 or 64 dwords of PCI config space depending on which
4544 * bus we're on (PCI(X) vs. PCI-E)
2f82665f
JB		 4545 */
4546#define PCIE_CONFIG_SPACE_LEN 256
4547#define PCI_CONFIG_SPACE_LEN 64
4548static int
4549e1000_pci_save_state(struct e1000_adapter *adapter)
4550{
4551 struct pci_dev *dev = adapter->pdev;
4552 int size;
4553 int i;
0f15a8fa 4554
2f82665f
JB		 4555 if (adapter->hw.mac_type >= e1000_82571)
4556 size = PCIE_CONFIG_SPACE_LEN;
4557 else
4558 size = PCI_CONFIG_SPACE_LEN;
4559
4560 WARN_ON(adapter->config_space != NULL);
4561
4562 adapter->config_space = kmalloc(size, GFP_KERNEL);
4563 if (!adapter->config_space) {
4564 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4565 return -ENOMEM;
4566 }
4567 for (i = 0; i < (size / 4); i++)
4568 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4569 return 0;
4570}
4571
4572static void
4573e1000_pci_restore_state(struct e1000_adapter *adapter)
4574{
4575 struct pci_dev *dev = adapter->pdev;
4576 int size;
4577 int i;
0f15a8fa 4578
2f82665f
JB		 4579 if (adapter->config_space == NULL)
4580 return;
0f15a8fa 4581
2f82665f
JB		 4582 if (adapter->hw.mac_type >= e1000_82571)
4583 size = PCIE_CONFIG_SPACE_LEN;
4584 else
4585 size = PCI_CONFIG_SPACE_LEN;
4586 for (i = 0; i < (size / 4); i++)
4587 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4588 kfree(adapter->config_space);
4589 adapter->config_space = NULL;
4590 return;
4591}
4592#endif /* CONFIG_PM */
4593
1da177e4 4594static int
829ca9a3 4595e1000_suspend(struct pci_dev *pdev, pm_message_t state)
1da177e4
LT		 4596{
4597 struct net_device *netdev = pci_get_drvdata(pdev);
60490fe0 4598 struct e1000_adapter *adapter = netdev_priv(netdev);
b55ccb35 4599 uint32_t ctrl, ctrl_ext, rctl, manc, status;
1da177e4 4600 uint32_t wufc = adapter->wol;
6fdfef16 4601#ifdef CONFIG_PM
240b1710 4602 int retval = 0;
6fdfef16 4603#endif
1da177e4
LT		 4604
4605 netif_device_detach(netdev);
4606
2db10a08
AK		 4607 if (netif_running(netdev)) {
4608 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1da177e4 4609 e1000_down(adapter);
2db10a08 4610 }
1da177e4 4611
2f82665f 4612#ifdef CONFIG_PM
0f15a8fa
JK		 4613 /* Implement our own version of pci_save_state(pdev) because pci-
4614 * express adapters have 256-byte config spaces. */
2f82665f
JB		 4615 retval = e1000_pci_save_state(adapter);
4616 if (retval)
4617 return retval;
4618#endif
4619
1da177e4 4620 status = E1000_READ_REG(&adapter->hw, STATUS);
96838a40 4621 if (status & E1000_STATUS_LU)
1da177e4
LT		 4622 wufc &= ~E1000_WUFC_LNKC;
4623
96838a40 4624 if (wufc) {
1da177e4
LT		 4625 e1000_setup_rctl(adapter);
4626 e1000_set_multi(netdev);
4627
4628 /* turn on all-multi mode if wake on multicast is enabled */
96838a40 4629 if (adapter->wol & E1000_WUFC_MC) {
1da177e4
LT		 4630 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4631 rctl |= E1000_RCTL_MPE;
4632 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4633 }
4634
96838a40 4635 if (adapter->hw.mac_type >= e1000_82540) {
1da177e4
LT		 4636 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4637 /* advertise wake from D3Cold */
4638 #define E1000_CTRL_ADVD3WUC 0x00100000
4639 /* phy power management enable */
4640 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4641 ctrl |= E1000_CTRL_ADVD3WUC |
4642 E1000_CTRL_EN_PHY_PWR_MGMT;
4643 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4644 }
4645
96838a40 4646 if (adapter->hw.media_type == e1000_media_type_fiber ||
1da177e4
LT		 4647 adapter->hw.media_type == e1000_media_type_internal_serdes) {
4648 /* keep the laser running in D3 */
4649 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4650 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4651 E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4652 }
4653
2d7edb92
MC		 4654 /* Allow time for pending master requests to run */
4655 e1000_disable_pciex_master(&adapter->hw);
4656
1da177e4
LT		 4657 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4658 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
d0e027db
AK		 4659 pci_enable_wake(pdev, PCI_D3hot, 1);
4660 pci_enable_wake(pdev, PCI_D3cold, 1);
1da177e4
LT		 4661 } else {
4662 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4663 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
d0e027db
AK		 4664 pci_enable_wake(pdev, PCI_D3hot, 0);
4665 pci_enable_wake(pdev, PCI_D3cold, 0);
1da177e4
LT		 4666 }
4667
cd94dd0b 4668 /* FIXME: this code is incorrect for PCI Express */
96838a40 4669 if (adapter->hw.mac_type >= e1000_82540 &&
cd94dd0b 4670 adapter->hw.mac_type != e1000_ich8lan &&
1da177e4
LT		 4671 adapter->hw.media_type == e1000_media_type_copper) {
4672 manc = E1000_READ_REG(&adapter->hw, MANC);
96838a40 4673 if (manc & E1000_MANC_SMBUS_EN) {
1da177e4
LT		 4674 manc |= E1000_MANC_ARP_EN;
4675 E1000_WRITE_REG(&adapter->hw, MANC, manc);
d0e027db
AK		 4676 pci_enable_wake(pdev, PCI_D3hot, 1);
4677 pci_enable_wake(pdev, PCI_D3cold, 1);
1da177e4
LT		 4678 }
4679 }
4680
cd94dd0b
AK		 4681 if (adapter->hw.phy_type == e1000_phy_igp_3)
4682 e1000_phy_powerdown_workaround(&adapter->hw);
4683
b55ccb35
JK		 4684 /* Release control of h/w to f/w. If f/w is AMT enabled, this
4685 * would have already happened in close and is redundant. */
4686 e1000_release_hw_control(adapter);
2d7edb92 4687
1da177e4 4688 pci_disable_device(pdev);
240b1710 4689
d0e027db 4690 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1da177e4
LT		 4691
4692 return 0;
4693}
4694
2f82665f 4695#ifdef CONFIG_PM
1da177e4
LT		 4696static int
4697e1000_resume(struct pci_dev *pdev)
4698{
4699 struct net_device *netdev = pci_get_drvdata(pdev);
60490fe0 4700 struct e1000_adapter *adapter = netdev_priv(netdev);
b55ccb35 4701 uint32_t manc, ret_val;
1da177e4 4702
d0e027db 4703 pci_set_power_state(pdev, PCI_D0);
2f82665f 4704 e1000_pci_restore_state(adapter);
2b02893e 4705 ret_val = pci_enable_device(pdev);
a4cb847d 4706 pci_set_master(pdev);
1da177e4 4707
d0e027db
AK		 4708 pci_enable_wake(pdev, PCI_D3hot, 0);
4709 pci_enable_wake(pdev, PCI_D3cold, 0);
1da177e4
LT		 4710
4711 e1000_reset(adapter);
4712 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4713
96838a40 4714 if (netif_running(netdev))
1da177e4
LT		 4715 e1000_up(adapter);
4716
4717 netif_device_attach(netdev);
4718
cd94dd0b 4719 /* FIXME: this code is incorrect for PCI Express */
96838a40 4720 if (adapter->hw.mac_type >= e1000_82540 &&
cd94dd0b 4721 adapter->hw.mac_type != e1000_ich8lan &&
1da177e4
LT		 4722 adapter->hw.media_type == e1000_media_type_copper) {
4723 manc = E1000_READ_REG(&adapter->hw, MANC);
4724 manc &= ~(E1000_MANC_ARP_EN);
4725 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4726 }
4727
b55ccb35
JK		 4728 /* If the controller is 82573 and f/w is AMT, do not set
4729 * DRV_LOAD until the interface is up. For all other cases,
4730 * let the f/w know that the h/w is now under the control
4731 * of the driver. */
4732 if (adapter->hw.mac_type != e1000_82573 ||
4733 !e1000_check_mng_mode(&adapter->hw))
4734 e1000_get_hw_control(adapter);
2d7edb92 4735
1da177e4
LT		 4736 return 0;
4737}
4738#endif
c653e635
AK		 4739
4740static void e1000_shutdown(struct pci_dev *pdev)
4741{
4742 e1000_suspend(pdev, PMSG_SUSPEND);
4743}
4744
1da177e4
LT		 4745#ifdef CONFIG_NET_POLL_CONTROLLER
4746/*
4747 * Polling 'interrupt' - used by things like netconsole to send skbs
4748 * without having to re-enable interrupts. It's not called while
4749 * the interrupt routine is executing.
4750 */
4751static void
2648345f 4752e1000_netpoll(struct net_device *netdev)
1da177e4 4753{
60490fe0 4754 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 4755 disable_irq(adapter->pdev->irq);
4756 e1000_intr(adapter->pdev->irq, netdev, NULL);
c4cfe567 4757 e1000_clean_tx_irq(adapter, adapter->tx_ring);
e8da8be1
JK		 4758#ifndef CONFIG_E1000_NAPI
4759 adapter->clean_rx(adapter, adapter->rx_ring);
4760#endif
1da177e4
LT		 4761 enable_irq(adapter->pdev->irq);
4762}
4763#endif
4764
9026729b
AK		 4765/**
4766 * e1000_io_error_detected - called when PCI error is detected
4767 * @pdev: Pointer to PCI device
4768 * @state: The current pci conneection state
4769 *
4770 * This function is called after a PCI bus error affecting
4771 * this device has been detected.
4772 */
4773static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
4774{
4775 struct net_device *netdev = pci_get_drvdata(pdev);
4776 struct e1000_adapter *adapter = netdev->priv;
4777
4778 netif_device_detach(netdev);
4779
4780 if (netif_running(netdev))
4781 e1000_down(adapter);
4782
4783 /* Request a slot slot reset. */
4784 return PCI_ERS_RESULT_NEED_RESET;
4785}
4786
4787/**
4788 * e1000_io_slot_reset - called after the pci bus has been reset.
4789 * @pdev: Pointer to PCI device
4790 *
4791 * Restart the card from scratch, as if from a cold-boot. Implementation
4792 * resembles the first-half of the e1000_resume routine.
4793 */
4794static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4795{
4796 struct net_device *netdev = pci_get_drvdata(pdev);
4797 struct e1000_adapter *adapter = netdev->priv;
4798
4799 if (pci_enable_device(pdev)) {
4800 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4801 return PCI_ERS_RESULT_DISCONNECT;
4802 }
4803 pci_set_master(pdev);
4804
4805 pci_enable_wake(pdev, 3, 0);
4806 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
4807
4808 /* Perform card reset only on one instance of the card */
4809 if (PCI_FUNC (pdev->devfn) != 0)
4810 return PCI_ERS_RESULT_RECOVERED;
4811
4812 e1000_reset(adapter);
4813 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4814
4815 return PCI_ERS_RESULT_RECOVERED;
4816}
4817
4818/**
4819 * e1000_io_resume - called when traffic can start flowing again.
4820 * @pdev: Pointer to PCI device
4821 *
4822 * This callback is called when the error recovery driver tells us that
4823 * its OK to resume normal operation. Implementation resembles the
4824 * second-half of the e1000_resume routine.
4825 */
4826static void e1000_io_resume(struct pci_dev *pdev)
4827{
4828 struct net_device *netdev = pci_get_drvdata(pdev);
4829 struct e1000_adapter *adapter = netdev->priv;
4830 uint32_t manc, swsm;
4831
4832 if (netif_running(netdev)) {
4833 if (e1000_up(adapter)) {
4834 printk("e1000: can't bring device back up after reset\n");
4835 return;
4836 }
4837 }
4838
4839 netif_device_attach(netdev);
4840
4841 if (adapter->hw.mac_type >= e1000_82540 &&
4842 adapter->hw.media_type == e1000_media_type_copper) {
4843 manc = E1000_READ_REG(&adapter->hw, MANC);
4844 manc &= ~(E1000_MANC_ARP_EN);
4845 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4846 }
4847
4848 switch (adapter->hw.mac_type) {
4849 case e1000_82573:
4850 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4851 E1000_WRITE_REG(&adapter->hw, SWSM,
4852 swsm | E1000_SWSM_DRV_LOAD);
4853 break;
4854 default:
4855 break;
4856 }
4857
4858 if (netif_running(netdev))
4859 mod_timer(&adapter->watchdog_timer, jiffies);
4860}
4861
1da177e4 4862/* e1000_main.c */
Linux 6.x block layer and io_uring tree(s)