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network drivers: eliminate unneeded kill_vid code
[linux.git] / drivers / net / e1000 / e1000_main.c
CommitLineData
1da177e4
LT		 1/*******************************************************************************
2
0abb6eb1
AK		 3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
1da177e4 13 more details.
0abb6eb1 14
1da177e4 15 You should have received a copy of the GNU General Public License along with
0abb6eb1
AK		 16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
1da177e4
LT		 22 Contact Information:
23 Linux NICS <[email protected]>
3d41e30a 24 e1000-devel Mailing List <[email protected]>
1da177e4
LT		 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
29#include "e1000.h"
d0bb53e1 30#include <net/ip6_checksum.h>
1da177e4 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
7e721579 39#define DRV_VERSION "7.3.20-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),
5881cde8 102 INTEL_E1000_ETHERNET_DEVICE(0x10A4),
b7ee49db 103 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
6418ecc6 104 INTEL_E1000_ETHERNET_DEVICE(0x10B9),
ae2c3860
AK		 105 INTEL_E1000_ETHERNET_DEVICE(0x10BA),
106 INTEL_E1000_ETHERNET_DEVICE(0x10BB),
fc2307d0
AK		 107 INTEL_E1000_ETHERNET_DEVICE(0x10BC),
108 INTEL_E1000_ETHERNET_DEVICE(0x10C4),
109 INTEL_E1000_ETHERNET_DEVICE(0x10C5),
1da177e4
LT		 110 /* required last entry */
111 {0,}
112};
113
114MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
115
35574764
NN		 116int e1000_up(struct e1000_adapter *adapter);
117void e1000_down(struct e1000_adapter *adapter);
118void e1000_reinit_locked(struct e1000_adapter *adapter);
119void e1000_reset(struct e1000_adapter *adapter);
120int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
121int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
122int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
123void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
124void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
3ad2cc67 125static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
35574764 126 struct e1000_tx_ring *txdr);
3ad2cc67 127static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
35574764 128 struct e1000_rx_ring *rxdr);
3ad2cc67 129static void e1000_free_tx_resources(struct e1000_adapter *adapter,
35574764 130 struct e1000_tx_ring *tx_ring);
3ad2cc67 131static void e1000_free_rx_resources(struct e1000_adapter *adapter,
35574764
NN		 132 struct e1000_rx_ring *rx_ring);
133void e1000_update_stats(struct e1000_adapter *adapter);
1da177e4
LT		 134
135static int e1000_init_module(void);
136static void e1000_exit_module(void);
137static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
138static void __devexit e1000_remove(struct pci_dev *pdev);
581d708e 139static int e1000_alloc_queues(struct e1000_adapter *adapter);
1da177e4
LT		 140static int e1000_sw_init(struct e1000_adapter *adapter);
141static int e1000_open(struct net_device *netdev);
142static int e1000_close(struct net_device *netdev);
143static void e1000_configure_tx(struct e1000_adapter *adapter);
144static void e1000_configure_rx(struct e1000_adapter *adapter);
145static void e1000_setup_rctl(struct e1000_adapter *adapter);
581d708e
MC		 146static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
147static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
148static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
149 struct e1000_tx_ring *tx_ring);
150static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
151 struct e1000_rx_ring *rx_ring);
1da177e4
LT		 152static void e1000_set_multi(struct net_device *netdev);
153static void e1000_update_phy_info(unsigned long data);
154static void e1000_watchdog(unsigned long data);
1da177e4
LT		 155static void e1000_82547_tx_fifo_stall(unsigned long data);
156static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
157static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
158static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
159static int e1000_set_mac(struct net_device *netdev, void *p);
7d12e780 160static irqreturn_t e1000_intr(int irq, void *data);
9ac98284 161static irqreturn_t e1000_intr_msi(int irq, void *data);
581d708e
MC		 162static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
163 struct e1000_tx_ring *tx_ring);
1da177e4 164#ifdef CONFIG_E1000_NAPI
581d708e 165static int e1000_clean(struct net_device *poll_dev, int *budget);
1da177e4 166static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
581d708e 167 struct e1000_rx_ring *rx_ring,
1da177e4 168 int *work_done, int work_to_do);
2d7edb92 169static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
581d708e 170 struct e1000_rx_ring *rx_ring,
2d7edb92 171 int *work_done, int work_to_do);
1da177e4 172#else
581d708e
MC		 173static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
174 struct e1000_rx_ring *rx_ring);
175static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
176 struct e1000_rx_ring *rx_ring);
1da177e4 177#endif
581d708e 178static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
72d64a43
JK		 179 struct e1000_rx_ring *rx_ring,
180 int cleaned_count);
581d708e 181static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
72d64a43
JK		 182 struct e1000_rx_ring *rx_ring,
183 int cleaned_count);
1da177e4
LT		 184static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
185static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
186 int cmd);
35574764 187void e1000_set_ethtool_ops(struct net_device *netdev);
1da177e4
LT		 188static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
189static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
190static void e1000_tx_timeout(struct net_device *dev);
65f27f38 191static void e1000_reset_task(struct work_struct *work);
1da177e4 192static void e1000_smartspeed(struct e1000_adapter *adapter);
e619d523
AK		 193static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
194 struct sk_buff *skb);
1da177e4
LT		 195
196static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
197static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
198static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
199static void e1000_restore_vlan(struct e1000_adapter *adapter);
200
977e74b5 201static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
6fdfef16 202#ifdef CONFIG_PM
1da177e4
LT		 203static int e1000_resume(struct pci_dev *pdev);
204#endif
c653e635 205static void e1000_shutdown(struct pci_dev *pdev);
1da177e4
LT		 206
207#ifdef CONFIG_NET_POLL_CONTROLLER
208/* for netdump / net console */
209static void e1000_netpoll (struct net_device *netdev);
210#endif
211
35574764
NN		 212extern void e1000_check_options(struct e1000_adapter *adapter);
213
1f753861
JB		 214#define COPYBREAK_DEFAULT 256
215static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
216module_param(copybreak, uint, 0644);
217MODULE_PARM_DESC(copybreak,
218 "Maximum size of packet that is copied to a new buffer on receive");
219
9026729b
AK		 220static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
221 pci_channel_state_t state);
222static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
223static void e1000_io_resume(struct pci_dev *pdev);
224
225static struct pci_error_handlers e1000_err_handler = {
226 .error_detected = e1000_io_error_detected,
227 .slot_reset = e1000_io_slot_reset,
228 .resume = e1000_io_resume,
229};
24025e4e 230
1da177e4
LT		 231static struct pci_driver e1000_driver = {
232 .name = e1000_driver_name,
233 .id_table = e1000_pci_tbl,
234 .probe = e1000_probe,
235 .remove = __devexit_p(e1000_remove),
c4e24f01 236#ifdef CONFIG_PM
1da177e4 237 /* Power Managment Hooks */
1da177e4 238 .suspend = e1000_suspend,
c653e635 239 .resume = e1000_resume,
1da177e4 240#endif
9026729b
AK		 241 .shutdown = e1000_shutdown,
242 .err_handler = &e1000_err_handler
1da177e4
LT		 243};
244
245MODULE_AUTHOR("Intel Corporation, <[email protected]>");
246MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
247MODULE_LICENSE("GPL");
248MODULE_VERSION(DRV_VERSION);
249
250static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
251module_param(debug, int, 0);
252MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
253
254/**
255 * e1000_init_module - Driver Registration Routine
256 *
257 * e1000_init_module is the first routine called when the driver is
258 * loaded. All it does is register with the PCI subsystem.
259 **/
260
261static int __init
262e1000_init_module(void)
263{
264 int ret;
265 printk(KERN_INFO "%s - version %s\n",
266 e1000_driver_string, e1000_driver_version);
267
268 printk(KERN_INFO "%s\n", e1000_copyright);
269
29917620 270 ret = pci_register_driver(&e1000_driver);
1f753861
JB		 271 if (copybreak != COPYBREAK_DEFAULT) {
272 if (copybreak == 0)
273 printk(KERN_INFO "e1000: copybreak disabled\n");
274 else
275 printk(KERN_INFO "e1000: copybreak enabled for "
276 "packets <= %u bytes\n", copybreak);
277 }
1da177e4
LT		 278 return ret;
279}
280
281module_init(e1000_init_module);
282
283/**
284 * e1000_exit_module - Driver Exit Cleanup Routine
285 *
286 * e1000_exit_module is called just before the driver is removed
287 * from memory.
288 **/
289
290static void __exit
291e1000_exit_module(void)
292{
1da177e4
LT		 293 pci_unregister_driver(&e1000_driver);
294}
295
296module_exit(e1000_exit_module);
297
2db10a08
AK		 298static int e1000_request_irq(struct e1000_adapter *adapter)
299{
300 struct net_device *netdev = adapter->netdev;
e94bd23f
AK		 301 void (*handler) = &e1000_intr;
302 int irq_flags = IRQF_SHARED;
303 int err;
2db10a08 304
9ac98284 305 if (adapter->hw.mac_type >= e1000_82571) {
e94bd23f
AK		 306 adapter->have_msi = !pci_enable_msi(adapter->pdev);
307 if (adapter->have_msi) {
308 handler = &e1000_intr_msi;
309 irq_flags = 0;
2db10a08
AK		 310 }
311 }
e94bd23f
AK		 312
313 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
314 netdev);
315 if (err) {
316 if (adapter->have_msi)
317 pci_disable_msi(adapter->pdev);
2db10a08
AK		 318 DPRINTK(PROBE, ERR,
319 "Unable to allocate interrupt Error: %d\n", err);
e94bd23f 320 }
2db10a08
AK		 321
322 return err;
323}
324
325static void e1000_free_irq(struct e1000_adapter *adapter)
326{
327 struct net_device *netdev = adapter->netdev;
328
329 free_irq(adapter->pdev->irq, netdev);
330
2db10a08
AK		 331 if (adapter->have_msi)
332 pci_disable_msi(adapter->pdev);
2db10a08
AK		 333}
334
1da177e4
LT		 335/**
336 * e1000_irq_disable - Mask off interrupt generation on the NIC
337 * @adapter: board private structure
338 **/
339
e619d523 340static void
1da177e4
LT		 341e1000_irq_disable(struct e1000_adapter *adapter)
342{
343 atomic_inc(&adapter->irq_sem);
344 E1000_WRITE_REG(&adapter->hw, IMC, ~0);
345 E1000_WRITE_FLUSH(&adapter->hw);
346 synchronize_irq(adapter->pdev->irq);
347}
348
349/**
350 * e1000_irq_enable - Enable default interrupt generation settings
351 * @adapter: board private structure
352 **/
353
e619d523 354static void
1da177e4
LT		 355e1000_irq_enable(struct e1000_adapter *adapter)
356{
96838a40 357 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
1da177e4
LT		 358 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
359 E1000_WRITE_FLUSH(&adapter->hw);
360 }
361}
3ad2cc67
AB		 362
363static void
2d7edb92
MC		 364e1000_update_mng_vlan(struct e1000_adapter *adapter)
365{
366 struct net_device *netdev = adapter->netdev;
367 uint16_t vid = adapter->hw.mng_cookie.vlan_id;
368 uint16_t old_vid = adapter->mng_vlan_id;
96838a40 369 if (adapter->vlgrp) {
5c15bdec 370 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
96838a40 371 if (adapter->hw.mng_cookie.status &
2d7edb92
MC		 372 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
373 e1000_vlan_rx_add_vid(netdev, vid);
374 adapter->mng_vlan_id = vid;
375 } else
376 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
96838a40
JB		 377
378 if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
379 (vid != old_vid) &&
5c15bdec 380 !vlan_group_get_device(adapter->vlgrp, old_vid))
2d7edb92 381 e1000_vlan_rx_kill_vid(netdev, old_vid);
c5f226fe
JK		 382 } else
383 adapter->mng_vlan_id = vid;
2d7edb92
MC		 384 }
385}
b55ccb35
JK		 386
387/**
388 * e1000_release_hw_control - release control of the h/w to f/w
389 * @adapter: address of board private structure
390 *
391 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
392 * For ASF and Pass Through versions of f/w this means that the
393 * driver is no longer loaded. For AMT version (only with 82573) i
90fb5135 394 * of the f/w this means that the network i/f is closed.
76c224bc 395 *
b55ccb35
JK		 396 **/
397
e619d523 398static void
b55ccb35
JK		 399e1000_release_hw_control(struct e1000_adapter *adapter)
400{
401 uint32_t ctrl_ext;
402 uint32_t swsm;
403
404 /* Let firmware taken over control of h/w */
405 switch (adapter->hw.mac_type) {
b55ccb35
JK		 406 case e1000_82573:
407 swsm = E1000_READ_REG(&adapter->hw, SWSM);
408 E1000_WRITE_REG(&adapter->hw, SWSM,
409 swsm & ~E1000_SWSM_DRV_LOAD);
31d76442
BA		 410 break;
411 case e1000_82571:
412 case e1000_82572:
413 case e1000_80003es2lan:
cd94dd0b 414 case e1000_ich8lan:
31d76442 415 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
cd94dd0b 416 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
31d76442 417 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
cd94dd0b 418 break;
b55ccb35
JK		 419 default:
420 break;
421 }
422}
423
424/**
425 * e1000_get_hw_control - get control of the h/w from f/w
426 * @adapter: address of board private structure
427 *
428 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
76c224bc
AK		 429 * For ASF and Pass Through versions of f/w this means that
430 * the driver is loaded. For AMT version (only with 82573)
90fb5135 431 * of the f/w this means that the network i/f is open.
76c224bc 432 *
b55ccb35
JK		 433 **/
434
e619d523 435static void
b55ccb35
JK		 436e1000_get_hw_control(struct e1000_adapter *adapter)
437{
438 uint32_t ctrl_ext;
439 uint32_t swsm;
90fb5135 440
b55ccb35
JK		 441 /* Let firmware know the driver has taken over */
442 switch (adapter->hw.mac_type) {
b55ccb35
JK		 443 case e1000_82573:
444 swsm = E1000_READ_REG(&adapter->hw, SWSM);
445 E1000_WRITE_REG(&adapter->hw, SWSM,
446 swsm | E1000_SWSM_DRV_LOAD);
447 break;
31d76442
BA		 448 case e1000_82571:
449 case e1000_82572:
450 case e1000_80003es2lan:
cd94dd0b 451 case e1000_ich8lan:
31d76442
BA		 452 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
453 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
454 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
cd94dd0b 455 break;
b55ccb35
JK		 456 default:
457 break;
458 }
459}
460
0fccd0e9
JG		 461static void
462e1000_init_manageability(struct e1000_adapter *adapter)
463{
464 if (adapter->en_mng_pt) {
465 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
466
467 /* disable hardware interception of ARP */
468 manc &= ~(E1000_MANC_ARP_EN);
469
470 /* enable receiving management packets to the host */
471 /* this will probably generate destination unreachable messages
472 * from the host OS, but the packets will be handled on SMBUS */
473 if (adapter->hw.has_manc2h) {
474 uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);
475
476 manc |= E1000_MANC_EN_MNG2HOST;
477#define E1000_MNG2HOST_PORT_623 (1 << 5)
478#define E1000_MNG2HOST_PORT_664 (1 << 6)
479 manc2h |= E1000_MNG2HOST_PORT_623;
480 manc2h |= E1000_MNG2HOST_PORT_664;
481 E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
482 }
483
484 E1000_WRITE_REG(&adapter->hw, MANC, manc);
485 }
486}
487
488static void
489e1000_release_manageability(struct e1000_adapter *adapter)
490{
491 if (adapter->en_mng_pt) {
492 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
493
494 /* re-enable hardware interception of ARP */
495 manc |= E1000_MANC_ARP_EN;
496
497 if (adapter->hw.has_manc2h)
498 manc &= ~E1000_MANC_EN_MNG2HOST;
499
500 /* don't explicitly have to mess with MANC2H since
501 * MANC has an enable disable that gates MANC2H */
502
503 E1000_WRITE_REG(&adapter->hw, MANC, manc);
504 }
505}
506
e0aac5a2
AK		 507/**
508 * e1000_configure - configure the hardware for RX and TX
509 * @adapter = private board structure
510 **/
511static void e1000_configure(struct e1000_adapter *adapter)
1da177e4
LT		 512{
513 struct net_device *netdev = adapter->netdev;
2db10a08 514 int i;
1da177e4 515
1da177e4
LT		 516 e1000_set_multi(netdev);
517
518 e1000_restore_vlan(adapter);
0fccd0e9 519 e1000_init_manageability(adapter);
1da177e4
LT		 520
521 e1000_configure_tx(adapter);
522 e1000_setup_rctl(adapter);
523 e1000_configure_rx(adapter);
72d64a43
JK		 524 /* call E1000_DESC_UNUSED which always leaves
525 * at least 1 descriptor unused to make sure
526 * next_to_use != next_to_clean */
f56799ea 527 for (i = 0; i < adapter->num_rx_queues; i++) {
72d64a43 528 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
a292ca6e
JK		 529 adapter->alloc_rx_buf(adapter, ring,
530 E1000_DESC_UNUSED(ring));
f56799ea 531 }
1da177e4 532
7bfa4816 533 adapter->tx_queue_len = netdev->tx_queue_len;
e0aac5a2
AK		 534}
535
536int e1000_up(struct e1000_adapter *adapter)
537{
538 /* hardware has been reset, we need to reload some things */
539 e1000_configure(adapter);
540
541 clear_bit(__E1000_DOWN, &adapter->flags);
7bfa4816 542
1da177e4 543#ifdef CONFIG_E1000_NAPI
e0aac5a2 544 netif_poll_enable(adapter->netdev);
1da177e4 545#endif
5de55624
MC		 546 e1000_irq_enable(adapter);
547
79f3d399
JB		 548 /* fire a link change interrupt to start the watchdog */
549 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
1da177e4
LT		 550 return 0;
551}
552
79f05bf0
AK		 553/**
554 * e1000_power_up_phy - restore link in case the phy was powered down
555 * @adapter: address of board private structure
556 *
557 * The phy may be powered down to save power and turn off link when the
558 * driver is unloaded and wake on lan is not enabled (among others)
559 * *** this routine MUST be followed by a call to e1000_reset ***
560 *
561 **/
562
d658266e 563void e1000_power_up_phy(struct e1000_adapter *adapter)
79f05bf0
AK		 564{
565 uint16_t mii_reg = 0;
566
567 /* Just clear the power down bit to wake the phy back up */
568 if (adapter->hw.media_type == e1000_media_type_copper) {
569 /* according to the manual, the phy will retain its
570 * settings across a power-down/up cycle */
571 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
572 mii_reg &= ~MII_CR_POWER_DOWN;
573 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
574 }
575}
576
577static void e1000_power_down_phy(struct e1000_adapter *adapter)
578{
61c2505f
BA		 579 /* Power down the PHY so no link is implied when interface is down *
580 * The PHY cannot be powered down if any of the following is TRUE *
79f05bf0
AK		 581 * (a) WoL is enabled
582 * (b) AMT is active
583 * (c) SoL/IDER session is active */
584 if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
61c2505f 585 adapter->hw.media_type == e1000_media_type_copper) {
79f05bf0 586 uint16_t mii_reg = 0;
61c2505f
BA		 587
588 switch (adapter->hw.mac_type) {
589 case e1000_82540:
590 case e1000_82545:
591 case e1000_82545_rev_3:
592 case e1000_82546:
593 case e1000_82546_rev_3:
594 case e1000_82541:
595 case e1000_82541_rev_2:
596 case e1000_82547:
597 case e1000_82547_rev_2:
598 if (E1000_READ_REG(&adapter->hw, MANC) &
599 E1000_MANC_SMBUS_EN)
600 goto out;
601 break;
602 case e1000_82571:
603 case e1000_82572:
604 case e1000_82573:
605 case e1000_80003es2lan:
606 case e1000_ich8lan:
607 if (e1000_check_mng_mode(&adapter->hw) ||
608 e1000_check_phy_reset_block(&adapter->hw))
609 goto out;
610 break;
611 default:
612 goto out;
613 }
79f05bf0
AK		 614 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
615 mii_reg |= MII_CR_POWER_DOWN;
616 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
617 mdelay(1);
618 }
61c2505f
BA		 619out:
620 return;
79f05bf0
AK		 621}
622
1da177e4
LT		 623void
624e1000_down(struct e1000_adapter *adapter)
625{
626 struct net_device *netdev = adapter->netdev;
627
1314bbf3
AK		 628 /* signal that we're down so the interrupt handler does not
629 * reschedule our watchdog timer */
630 set_bit(__E1000_DOWN, &adapter->flags);
631
e0aac5a2
AK		 632#ifdef CONFIG_E1000_NAPI
633 netif_poll_disable(netdev);
634#endif
1da177e4 635 e1000_irq_disable(adapter);
c1605eb3 636
1da177e4
LT		 637 del_timer_sync(&adapter->tx_fifo_stall_timer);
638 del_timer_sync(&adapter->watchdog_timer);
639 del_timer_sync(&adapter->phy_info_timer);
640
7bfa4816 641 netdev->tx_queue_len = adapter->tx_queue_len;
1da177e4
LT		 642 adapter->link_speed = 0;
643 adapter->link_duplex = 0;
644 netif_carrier_off(netdev);
645 netif_stop_queue(netdev);
646
647 e1000_reset(adapter);
581d708e
MC		 648 e1000_clean_all_tx_rings(adapter);
649 e1000_clean_all_rx_rings(adapter);
1da177e4 650}
1da177e4 651
2db10a08
AK		 652void
653e1000_reinit_locked(struct e1000_adapter *adapter)
654{
655 WARN_ON(in_interrupt());
656 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
657 msleep(1);
658 e1000_down(adapter);
659 e1000_up(adapter);
660 clear_bit(__E1000_RESETTING, &adapter->flags);
1da177e4
LT		 661}
662
663void
664e1000_reset(struct e1000_adapter *adapter)
665{
018ea44e 666 uint32_t pba = 0, tx_space, min_tx_space, min_rx_space;
1125ecbc 667 uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
018ea44e 668 boolean_t legacy_pba_adjust = FALSE;
1da177e4
LT		 669
670 /* Repartition Pba for greater than 9k mtu
671 * To take effect CTRL.RST is required.
672 */
673
2d7edb92 674 switch (adapter->hw.mac_type) {
018ea44e
BA		 675 case e1000_82542_rev2_0:
676 case e1000_82542_rev2_1:
677 case e1000_82543:
678 case e1000_82544:
679 case e1000_82540:
680 case e1000_82541:
681 case e1000_82541_rev_2:
682 legacy_pba_adjust = TRUE;
683 pba = E1000_PBA_48K;
684 break;
685 case e1000_82545:
686 case e1000_82545_rev_3:
687 case e1000_82546:
688 case e1000_82546_rev_3:
689 pba = E1000_PBA_48K;
690 break;
2d7edb92 691 case e1000_82547:
0e6ef3e0 692 case e1000_82547_rev_2:
018ea44e 693 legacy_pba_adjust = TRUE;
2d7edb92
MC		 694 pba = E1000_PBA_30K;
695 break;
868d5309
MC		 696 case e1000_82571:
697 case e1000_82572:
6418ecc6 698 case e1000_80003es2lan:
868d5309
MC		 699 pba = E1000_PBA_38K;
700 break;
2d7edb92 701 case e1000_82573:
018ea44e 702 pba = E1000_PBA_20K;
2d7edb92 703 break;
cd94dd0b
AK		 704 case e1000_ich8lan:
705 pba = E1000_PBA_8K;
018ea44e
BA		 706 case e1000_undefined:
707 case e1000_num_macs:
2d7edb92
MC		 708 break;
709 }
710
018ea44e
BA		 711 if (legacy_pba_adjust == TRUE) {
712 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
713 pba -= 8; /* allocate more FIFO for Tx */
2d7edb92 714
018ea44e
BA		 715 if (adapter->hw.mac_type == e1000_82547) {
716 adapter->tx_fifo_head = 0;
717 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
718 adapter->tx_fifo_size =
719 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
720 atomic_set(&adapter->tx_fifo_stall, 0);
721 }
722 } else if (adapter->hw.max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
723 /* adjust PBA for jumbo frames */
724 E1000_WRITE_REG(&adapter->hw, PBA, pba);
725
726 /* To maintain wire speed transmits, the Tx FIFO should be
727 * large enough to accomodate two full transmit packets,
728 * rounded up to the next 1KB and expressed in KB. Likewise,
729 * the Rx FIFO should be large enough to accomodate at least
730 * one full receive packet and is similarly rounded up and
731 * expressed in KB. */
732 pba = E1000_READ_REG(&adapter->hw, PBA);
733 /* upper 16 bits has Tx packet buffer allocation size in KB */
734 tx_space = pba >> 16;
735 /* lower 16 bits has Rx packet buffer allocation size in KB */
736 pba &= 0xffff;
737 /* don't include ethernet FCS because hardware appends/strips */
738 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
739 VLAN_TAG_SIZE;
740 min_tx_space = min_rx_space;
741 min_tx_space *= 2;
9099cfb9 742 min_tx_space = ALIGN(min_tx_space, 1024);
018ea44e 743 min_tx_space >>= 10;
9099cfb9 744 min_rx_space = ALIGN(min_rx_space, 1024);
018ea44e
BA		 745 min_rx_space >>= 10;
746
747 /* If current Tx allocation is less than the min Tx FIFO size,
748 * and the min Tx FIFO size is less than the current Rx FIFO
749 * allocation, take space away from current Rx allocation */
750 if (tx_space < min_tx_space &&
751 ((min_tx_space - tx_space) < pba)) {
752 pba = pba - (min_tx_space - tx_space);
753
754 /* PCI/PCIx hardware has PBA alignment constraints */
755 switch (adapter->hw.mac_type) {
756 case e1000_82545 ... e1000_82546_rev_3:
757 pba &= ~(E1000_PBA_8K - 1);
758 break;
759 default:
760 break;
761 }
762
763 /* if short on rx space, rx wins and must trump tx
764 * adjustment or use Early Receive if available */
765 if (pba < min_rx_space) {
766 switch (adapter->hw.mac_type) {
767 case e1000_82573:
768 /* ERT enabled in e1000_configure_rx */
769 break;
770 default:
771 pba = min_rx_space;
772 break;
773 }
774 }
775 }
1da177e4 776 }
2d7edb92 777
1da177e4
LT		 778 E1000_WRITE_REG(&adapter->hw, PBA, pba);
779
780 /* flow control settings */
f11b7f85
JK		 781 /* Set the FC high water mark to 90% of the FIFO size.
782 * Required to clear last 3 LSB */
783 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
cd94dd0b
AK		 784 /* We can't use 90% on small FIFOs because the remainder
785 * would be less than 1 full frame. In this case, we size
786 * it to allow at least a full frame above the high water
787 * mark. */
788 if (pba < E1000_PBA_16K)
789 fc_high_water_mark = (pba * 1024) - 1600;
f11b7f85
JK		 790
791 adapter->hw.fc_high_water = fc_high_water_mark;
792 adapter->hw.fc_low_water = fc_high_water_mark - 8;
87041639
JK		 793 if (adapter->hw.mac_type == e1000_80003es2lan)
794 adapter->hw.fc_pause_time = 0xFFFF;
795 else
796 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
1da177e4
LT		 797 adapter->hw.fc_send_xon = 1;
798 adapter->hw.fc = adapter->hw.original_fc;
799
2d7edb92 800 /* Allow time for pending master requests to run */
1da177e4 801 e1000_reset_hw(&adapter->hw);
96838a40 802 if (adapter->hw.mac_type >= e1000_82544)
1da177e4 803 E1000_WRITE_REG(&adapter->hw, WUC, 0);
09ae3e88 804
96838a40 805 if (e1000_init_hw(&adapter->hw))
1da177e4 806 DPRINTK(PROBE, ERR, "Hardware Error\n");
2d7edb92 807 e1000_update_mng_vlan(adapter);
3d5460a0
JB		 808
809 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
810 if (adapter->hw.mac_type >= e1000_82544 &&
811 adapter->hw.mac_type <= e1000_82547_rev_2 &&
812 adapter->hw.autoneg == 1 &&
813 adapter->hw.autoneg_advertised == ADVERTISE_1000_FULL) {
814 uint32_t ctrl = E1000_READ_REG(&adapter->hw, CTRL);
815 /* clear phy power management bit if we are in gig only mode,
816 * which if enabled will attempt negotiation to 100Mb, which
817 * can cause a loss of link at power off or driver unload */
818 ctrl &= ~E1000_CTRL_SWDPIN3;
819 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
820 }
821
1da177e4
LT		 822 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
823 E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
824
825 e1000_reset_adaptive(&adapter->hw);
826 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
9a53a202
AK		 827
828 if (!adapter->smart_power_down &&
829 (adapter->hw.mac_type == e1000_82571 ||
830 adapter->hw.mac_type == e1000_82572)) {
831 uint16_t phy_data = 0;
832 /* speed up time to link by disabling smart power down, ignore
833 * the return value of this function because there is nothing
834 * different we would do if it failed */
835 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
836 &phy_data);
837 phy_data &= ~IGP02E1000_PM_SPD;
838 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
839 phy_data);
840 }
841
0fccd0e9 842 e1000_release_manageability(adapter);
1da177e4
LT		 843}
844
845/**
846 * e1000_probe - Device Initialization Routine
847 * @pdev: PCI device information struct
848 * @ent: entry in e1000_pci_tbl
849 *
850 * Returns 0 on success, negative on failure
851 *
852 * e1000_probe initializes an adapter identified by a pci_dev structure.
853 * The OS initialization, configuring of the adapter private structure,
854 * and a hardware reset occur.
855 **/
856
857static int __devinit
858e1000_probe(struct pci_dev *pdev,
859 const struct pci_device_id *ent)
860{
861 struct net_device *netdev;
862 struct e1000_adapter *adapter;
2d7edb92 863 unsigned long mmio_start, mmio_len;
cd94dd0b 864 unsigned long flash_start, flash_len;
2d7edb92 865
1da177e4 866 static int cards_found = 0;
120cd576 867 static int global_quad_port_a = 0; /* global ksp3 port a indication */
2d7edb92 868 int i, err, pci_using_dac;
120cd576 869 uint16_t eeprom_data = 0;
1da177e4 870 uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
96838a40 871 if ((err = pci_enable_device(pdev)))
1da177e4
LT		 872 return err;
873
cd94dd0b
AK		 874 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
875 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
1da177e4
LT		 876 pci_using_dac = 1;
877 } else {
cd94dd0b
AK		 878 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
879 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
1da177e4 880 E1000_ERR("No usable DMA configuration, aborting\n");
6dd62ab0 881 goto err_dma;
1da177e4
LT		 882 }
883 pci_using_dac = 0;
884 }
885
96838a40 886 if ((err = pci_request_regions(pdev, e1000_driver_name)))
6dd62ab0 887 goto err_pci_reg;
1da177e4
LT		 888
889 pci_set_master(pdev);
890
6dd62ab0 891 err = -ENOMEM;
1da177e4 892 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
6dd62ab0 893 if (!netdev)
1da177e4 894 goto err_alloc_etherdev;
1da177e4
LT		 895
896 SET_MODULE_OWNER(netdev);
897 SET_NETDEV_DEV(netdev, &pdev->dev);
898
899 pci_set_drvdata(pdev, netdev);
60490fe0 900 adapter = netdev_priv(netdev);
1da177e4
LT		 901 adapter->netdev = netdev;
902 adapter->pdev = pdev;
903 adapter->hw.back = adapter;
904 adapter->msg_enable = (1 << debug) - 1;
905
906 mmio_start = pci_resource_start(pdev, BAR_0);
907 mmio_len = pci_resource_len(pdev, BAR_0);
908
6dd62ab0 909 err = -EIO;
1da177e4 910 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
6dd62ab0 911 if (!adapter->hw.hw_addr)
1da177e4 912 goto err_ioremap;
1da177e4 913
96838a40
JB		 914 for (i = BAR_1; i <= BAR_5; i++) {
915 if (pci_resource_len(pdev, i) == 0)
1da177e4 916 continue;
96838a40 917 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 918 adapter->hw.io_base = pci_resource_start(pdev, i);
919 break;
920 }
921 }
922
923 netdev->open = &e1000_open;
924 netdev->stop = &e1000_close;
925 netdev->hard_start_xmit = &e1000_xmit_frame;
926 netdev->get_stats = &e1000_get_stats;
927 netdev->set_multicast_list = &e1000_set_multi;
928 netdev->set_mac_address = &e1000_set_mac;
929 netdev->change_mtu = &e1000_change_mtu;
930 netdev->do_ioctl = &e1000_ioctl;
931 e1000_set_ethtool_ops(netdev);
932 netdev->tx_timeout = &e1000_tx_timeout;
933 netdev->watchdog_timeo = 5 * HZ;
934#ifdef CONFIG_E1000_NAPI
935 netdev->poll = &e1000_clean;
936 netdev->weight = 64;
937#endif
938 netdev->vlan_rx_register = e1000_vlan_rx_register;
939 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
940 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
941#ifdef CONFIG_NET_POLL_CONTROLLER
942 netdev->poll_controller = e1000_netpoll;
943#endif
0eb5a34c 944 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 945
946 netdev->mem_start = mmio_start;
947 netdev->mem_end = mmio_start + mmio_len;
948 netdev->base_addr = adapter->hw.io_base;
949
950 adapter->bd_number = cards_found;
951
952 /* setup the private structure */
953
96838a40 954 if ((err = e1000_sw_init(adapter)))
1da177e4
LT		 955 goto err_sw_init;
956
6dd62ab0 957 err = -EIO;
cd94dd0b
AK		 958 /* Flash BAR mapping must happen after e1000_sw_init
959 * because it depends on mac_type */
960 if ((adapter->hw.mac_type == e1000_ich8lan) &&
961 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
962 flash_start = pci_resource_start(pdev, 1);
963 flash_len = pci_resource_len(pdev, 1);
964 adapter->hw.flash_address = ioremap(flash_start, flash_len);
6dd62ab0 965 if (!adapter->hw.flash_address)
cd94dd0b 966 goto err_flashmap;
cd94dd0b
AK		 967 }
968
6dd62ab0 969 if (e1000_check_phy_reset_block(&adapter->hw))
2d7edb92
MC		 970 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
971
96838a40 972 if (adapter->hw.mac_type >= e1000_82543) {
1da177e4
LT		 973 netdev->features = NETIF_F_SG |
974 NETIF_F_HW_CSUM |
975 NETIF_F_HW_VLAN_TX |
976 NETIF_F_HW_VLAN_RX |
977 NETIF_F_HW_VLAN_FILTER;
cd94dd0b
AK		 978 if (adapter->hw.mac_type == e1000_ich8lan)
979 netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1da177e4
LT		 980 }
981
96838a40 982 if ((adapter->hw.mac_type >= e1000_82544) &&
1da177e4
LT		 983 (adapter->hw.mac_type != e1000_82547))
984 netdev->features |= NETIF_F_TSO;
2d7edb92 985
96838a40 986 if (adapter->hw.mac_type > e1000_82547_rev_2)
87ca4e5b 987 netdev->features |= NETIF_F_TSO6;
96838a40 988 if (pci_using_dac)
1da177e4
LT		 989 netdev->features |= NETIF_F_HIGHDMA;
990
76c224bc
AK		 991 netdev->features |= NETIF_F_LLTX;
992
2d7edb92
MC		 993 adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
994
cd94dd0b
AK		 995 /* initialize eeprom parameters */
996
997 if (e1000_init_eeprom_params(&adapter->hw)) {
998 E1000_ERR("EEPROM initialization failed\n");
6dd62ab0 999 goto err_eeprom;
cd94dd0b
AK		 1000 }
1001
96838a40 1002 /* before reading the EEPROM, reset the controller to
1da177e4 1003 * put the device in a known good starting state */
96838a40 1004
1da177e4
LT		 1005 e1000_reset_hw(&adapter->hw);
1006
1007 /* make sure the EEPROM is good */
1008
96838a40 1009 if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
1da177e4 1010 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 1011 goto err_eeprom;
1012 }
1013
1014 /* copy the MAC address out of the EEPROM */
1015
96838a40 1016 if (e1000_read_mac_addr(&adapter->hw))
1da177e4
LT		 1017 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1018 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
9beb0ac1 1019 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
1da177e4 1020
96838a40 1021 if (!is_valid_ether_addr(netdev->perm_addr)) {
1da177e4 1022 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1da177e4
LT		 1023 goto err_eeprom;
1024 }
1025
1da177e4
LT		 1026 e1000_get_bus_info(&adapter->hw);
1027
1028 init_timer(&adapter->tx_fifo_stall_timer);
1029 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1030 adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
1031
1032 init_timer(&adapter->watchdog_timer);
1033 adapter->watchdog_timer.function = &e1000_watchdog;
1034 adapter->watchdog_timer.data = (unsigned long) adapter;
1035
1da177e4
LT		 1036 init_timer(&adapter->phy_info_timer);
1037 adapter->phy_info_timer.function = &e1000_update_phy_info;
1038 adapter->phy_info_timer.data = (unsigned long) adapter;
1039
65f27f38 1040 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1da177e4 1041
1da177e4
LT		 1042 e1000_check_options(adapter);
1043
1044 /* Initial Wake on LAN setting
1045 * If APM wake is enabled in the EEPROM,
1046 * enable the ACPI Magic Packet filter
1047 */
1048
96838a40 1049 switch (adapter->hw.mac_type) {
1da177e4
LT		 1050 case e1000_82542_rev2_0:
1051 case e1000_82542_rev2_1:
1052 case e1000_82543:
1053 break;
1054 case e1000_82544:
1055 e1000_read_eeprom(&adapter->hw,
1056 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1057 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1058 break;
cd94dd0b
AK		 1059 case e1000_ich8lan:
1060 e1000_read_eeprom(&adapter->hw,
1061 EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1062 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1063 break;
1da177e4
LT		 1064 case e1000_82546:
1065 case e1000_82546_rev_3:
fd803241 1066 case e1000_82571:
6418ecc6 1067 case e1000_80003es2lan:
96838a40 1068 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1da177e4
LT		 1069 e1000_read_eeprom(&adapter->hw,
1070 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1071 break;
1072 }
1073 /* Fall Through */
1074 default:
1075 e1000_read_eeprom(&adapter->hw,
1076 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1077 break;
1078 }
96838a40 1079 if (eeprom_data & eeprom_apme_mask)
120cd576
JB		 1080 adapter->eeprom_wol |= E1000_WUFC_MAG;
1081
1082 /* now that we have the eeprom settings, apply the special cases
1083 * where the eeprom may be wrong or the board simply won't support
1084 * wake on lan on a particular port */
1085 switch (pdev->device) {
1086 case E1000_DEV_ID_82546GB_PCIE:
1087 adapter->eeprom_wol = 0;
1088 break;
1089 case E1000_DEV_ID_82546EB_FIBER:
1090 case E1000_DEV_ID_82546GB_FIBER:
1091 case E1000_DEV_ID_82571EB_FIBER:
1092 /* Wake events only supported on port A for dual fiber
1093 * regardless of eeprom setting */
1094 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
1095 adapter->eeprom_wol = 0;
1096 break;
1097 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
5881cde8 1098 case E1000_DEV_ID_82571EB_QUAD_COPPER:
fc2307d0 1099 case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
120cd576
JB		 1100 /* if quad port adapter, disable WoL on all but port A */
1101 if (global_quad_port_a != 0)
1102 adapter->eeprom_wol = 0;
1103 else
1104 adapter->quad_port_a = 1;
1105 /* Reset for multiple quad port adapters */
1106 if (++global_quad_port_a == 4)
1107 global_quad_port_a = 0;
1108 break;
1109 }
1110
1111 /* initialize the wol settings based on the eeprom settings */
1112 adapter->wol = adapter->eeprom_wol;
1da177e4 1113
fb3d47d4
JK		 1114 /* print bus type/speed/width info */
1115 {
1116 struct e1000_hw *hw = &adapter->hw;
1117 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1118 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1119 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1120 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1121 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1122 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1123 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1124 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1125 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1126 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1127 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1128 "32-bit"));
1129 }
1130
1131 for (i = 0; i < 6; i++)
1132 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
1133
1da177e4
LT		 1134 /* reset the hardware with the new settings */
1135 e1000_reset(adapter);
1136
b55ccb35
JK		 1137 /* If the controller is 82573 and f/w is AMT, do not set
1138 * DRV_LOAD until the interface is up. For all other cases,
1139 * let the f/w know that the h/w is now under the control
1140 * of the driver. */
1141 if (adapter->hw.mac_type != e1000_82573 ||
1142 !e1000_check_mng_mode(&adapter->hw))
1143 e1000_get_hw_control(adapter);
2d7edb92 1144
1da177e4 1145 strcpy(netdev->name, "eth%d");
96838a40 1146 if ((err = register_netdev(netdev)))
1da177e4
LT		 1147 goto err_register;
1148
1314bbf3
AK		 1149 /* tell the stack to leave us alone until e1000_open() is called */
1150 netif_carrier_off(netdev);
1151 netif_stop_queue(netdev);
1152
1da177e4
LT		 1153 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1154
1155 cards_found++;
1156 return 0;
1157
1158err_register:
6dd62ab0
VA		 1159 e1000_release_hw_control(adapter);
1160err_eeprom:
1161 if (!e1000_check_phy_reset_block(&adapter->hw))
1162 e1000_phy_hw_reset(&adapter->hw);
1163
cd94dd0b
AK		 1164 if (adapter->hw.flash_address)
1165 iounmap(adapter->hw.flash_address);
1166err_flashmap:
6dd62ab0
VA		 1167#ifdef CONFIG_E1000_NAPI
1168 for (i = 0; i < adapter->num_rx_queues; i++)
1169 dev_put(&adapter->polling_netdev[i]);
1170#endif
1171
1172 kfree(adapter->tx_ring);
1173 kfree(adapter->rx_ring);
1174#ifdef CONFIG_E1000_NAPI
1175 kfree(adapter->polling_netdev);
1176#endif
1da177e4 1177err_sw_init:
1da177e4
LT		 1178 iounmap(adapter->hw.hw_addr);
1179err_ioremap:
1180 free_netdev(netdev);
1181err_alloc_etherdev:
1182 pci_release_regions(pdev);
6dd62ab0
VA		 1183err_pci_reg:
1184err_dma:
1185 pci_disable_device(pdev);
1da177e4
LT		 1186 return err;
1187}
1188
1189/**
1190 * e1000_remove - Device Removal Routine
1191 * @pdev: PCI device information struct
1192 *
1193 * e1000_remove is called by the PCI subsystem to alert the driver
1194 * that it should release a PCI device. The could be caused by a
1195 * Hot-Plug event, or because the driver is going to be removed from
1196 * memory.
1197 **/
1198
1199static void __devexit
1200e1000_remove(struct pci_dev *pdev)
1201{
1202 struct net_device *netdev = pci_get_drvdata(pdev);
60490fe0 1203 struct e1000_adapter *adapter = netdev_priv(netdev);
581d708e
MC		 1204#ifdef CONFIG_E1000_NAPI
1205 int i;
1206#endif
1da177e4 1207
28e53bdd 1208 cancel_work_sync(&adapter->reset_task);
be2b28ed 1209
0fccd0e9 1210 e1000_release_manageability(adapter);
1da177e4 1211
b55ccb35
JK		 1212 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1213 * would have already happened in close and is redundant. */
1214 e1000_release_hw_control(adapter);
2d7edb92 1215
1da177e4 1216 unregister_netdev(netdev);
581d708e 1217#ifdef CONFIG_E1000_NAPI
f56799ea 1218 for (i = 0; i < adapter->num_rx_queues; i++)
15333061 1219 dev_put(&adapter->polling_netdev[i]);
581d708e 1220#endif
1da177e4 1221
96838a40 1222 if (!e1000_check_phy_reset_block(&adapter->hw))
2d7edb92 1223 e1000_phy_hw_reset(&adapter->hw);
1da177e4 1224
24025e4e
MC		 1225 kfree(adapter->tx_ring);
1226 kfree(adapter->rx_ring);
1227#ifdef CONFIG_E1000_NAPI
1228 kfree(adapter->polling_netdev);
1229#endif
1230
1da177e4 1231 iounmap(adapter->hw.hw_addr);
cd94dd0b
AK		 1232 if (adapter->hw.flash_address)
1233 iounmap(adapter->hw.flash_address);
1da177e4
LT		 1234 pci_release_regions(pdev);
1235
1236 free_netdev(netdev);
1237
1238 pci_disable_device(pdev);
1239}
1240
1241/**
1242 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1243 * @adapter: board private structure to initialize
1244 *
1245 * e1000_sw_init initializes the Adapter private data structure.
1246 * Fields are initialized based on PCI device information and
1247 * OS network device settings (MTU size).
1248 **/
1249
1250static int __devinit
1251e1000_sw_init(struct e1000_adapter *adapter)
1252{
1253 struct e1000_hw *hw = &adapter->hw;
1254 struct net_device *netdev = adapter->netdev;
1255 struct pci_dev *pdev = adapter->pdev;
581d708e
MC		 1256#ifdef CONFIG_E1000_NAPI
1257 int i;
1258#endif
1da177e4
LT		 1259
1260 /* PCI config space info */
1261
1262 hw->vendor_id = pdev->vendor;
1263 hw->device_id = pdev->device;
1264 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1265 hw->subsystem_id = pdev->subsystem_device;
1266
1267 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1268
1269 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1270
eb0f8054 1271 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
9e2feace 1272 adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1da177e4
LT		 1273 hw->max_frame_size = netdev->mtu +
1274 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1275 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1276
1277 /* identify the MAC */
1278
96838a40 1279 if (e1000_set_mac_type(hw)) {
1da177e4
LT		 1280 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1281 return -EIO;
1282 }
1283
96838a40 1284 switch (hw->mac_type) {
1da177e4
LT		 1285 default:
1286 break;
1287 case e1000_82541:
1288 case e1000_82547:
1289 case e1000_82541_rev_2:
1290 case e1000_82547_rev_2:
1291 hw->phy_init_script = 1;
1292 break;
1293 }
1294
1295 e1000_set_media_type(hw);
1296
1297 hw->wait_autoneg_complete = FALSE;
1298 hw->tbi_compatibility_en = TRUE;
1299 hw->adaptive_ifs = TRUE;
1300
1301 /* Copper options */
1302
96838a40 1303 if (hw->media_type == e1000_media_type_copper) {
1da177e4
LT		 1304 hw->mdix = AUTO_ALL_MODES;
1305 hw->disable_polarity_correction = FALSE;
1306 hw->master_slave = E1000_MASTER_SLAVE;
1307 }
1308
f56799ea
JK		 1309 adapter->num_tx_queues = 1;
1310 adapter->num_rx_queues = 1;
581d708e
MC		 1311
1312 if (e1000_alloc_queues(adapter)) {
1313 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1314 return -ENOMEM;
1315 }
1316
1317#ifdef CONFIG_E1000_NAPI
f56799ea 1318 for (i = 0; i < adapter->num_rx_queues; i++) {
581d708e
MC		 1319 adapter->polling_netdev[i].priv = adapter;
1320 adapter->polling_netdev[i].poll = &e1000_clean;
1321 adapter->polling_netdev[i].weight = 64;
1322 dev_hold(&adapter->polling_netdev[i]);
1323 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1324 }
7bfa4816 1325 spin_lock_init(&adapter->tx_queue_lock);
24025e4e
MC		 1326#endif
1327
47313054
HX		 1328 /* Explicitly disable IRQ since the NIC can be in any state. */
1329 atomic_set(&adapter->irq_sem, 0);
1330 e1000_irq_disable(adapter);
1331
1da177e4 1332 spin_lock_init(&adapter->stats_lock);
1da177e4 1333
1314bbf3
AK		 1334 set_bit(__E1000_DOWN, &adapter->flags);
1335
1da177e4
LT		 1336 return 0;
1337}
1338
581d708e
MC		 1339/**
1340 * e1000_alloc_queues - Allocate memory for all rings
1341 * @adapter: board private structure to initialize
1342 *
1343 * We allocate one ring per queue at run-time since we don't know the
1344 * number of queues at compile-time. The polling_netdev array is
1345 * intended for Multiqueue, but should work fine with a single queue.
1346 **/
1347
1348static int __devinit
1349e1000_alloc_queues(struct e1000_adapter *adapter)
1350{
1c7e5b12
YB		 1351 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1352 sizeof(struct e1000_tx_ring), GFP_KERNEL);
581d708e
MC		 1353 if (!adapter->tx_ring)
1354 return -ENOMEM;
581d708e 1355
1c7e5b12
YB		 1356 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1357 sizeof(struct e1000_rx_ring), GFP_KERNEL);
581d708e
MC		 1358 if (!adapter->rx_ring) {
1359 kfree(adapter->tx_ring);
1360 return -ENOMEM;
1361 }
581d708e
MC		 1362
1363#ifdef CONFIG_E1000_NAPI
1c7e5b12
YB		 1364 adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1365 sizeof(struct net_device),
1366 GFP_KERNEL);
581d708e
MC		 1367 if (!adapter->polling_netdev) {
1368 kfree(adapter->tx_ring);
1369 kfree(adapter->rx_ring);
1370 return -ENOMEM;
1371 }
581d708e
MC		 1372#endif
1373
1374 return E1000_SUCCESS;
1375}
1376
1da177e4
LT		 1377/**
1378 * e1000_open - Called when a network interface is made active
1379 * @netdev: network interface device structure
1380 *
1381 * Returns 0 on success, negative value on failure
1382 *
1383 * The open entry point is called when a network interface is made
1384 * active by the system (IFF_UP). At this point all resources needed
1385 * for transmit and receive operations are allocated, the interrupt
1386 * handler is registered with the OS, the watchdog timer is started,
1387 * and the stack is notified that the interface is ready.
1388 **/
1389
1390static int
1391e1000_open(struct net_device *netdev)
1392{
60490fe0 1393 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1394 int err;
1395
2db10a08 1396 /* disallow open during test */
1314bbf3 1397 if (test_bit(__E1000_TESTING, &adapter->flags))
2db10a08
AK		 1398 return -EBUSY;
1399
1da177e4 1400 /* allocate transmit descriptors */
e0aac5a2
AK		 1401 err = e1000_setup_all_tx_resources(adapter);
1402 if (err)
1da177e4
LT		 1403 goto err_setup_tx;
1404
1405 /* allocate receive descriptors */
e0aac5a2 1406 err = e1000_setup_all_rx_resources(adapter);
b5bf28cd 1407 if (err)
e0aac5a2 1408 goto err_setup_rx;
b5bf28cd 1409
79f05bf0
AK		 1410 e1000_power_up_phy(adapter);
1411
2d7edb92 1412 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
96838a40 1413 if ((adapter->hw.mng_cookie.status &
2d7edb92
MC		 1414 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1415 e1000_update_mng_vlan(adapter);
1416 }
1da177e4 1417
b55ccb35
JK		 1418 /* If AMT is enabled, let the firmware know that the network
1419 * interface is now open */
1420 if (adapter->hw.mac_type == e1000_82573 &&
1421 e1000_check_mng_mode(&adapter->hw))
1422 e1000_get_hw_control(adapter);
1423
e0aac5a2
AK		 1424 /* before we allocate an interrupt, we must be ready to handle it.
1425 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1426 * as soon as we call pci_request_irq, so we have to setup our
1427 * clean_rx handler before we do so. */
1428 e1000_configure(adapter);
1429
1430 err = e1000_request_irq(adapter);
1431 if (err)
1432 goto err_req_irq;
1433
1434 /* From here on the code is the same as e1000_up() */
1435 clear_bit(__E1000_DOWN, &adapter->flags);
1436
47313054
HX		 1437#ifdef CONFIG_E1000_NAPI
1438 netif_poll_enable(netdev);
1439#endif
1440
e0aac5a2
AK		 1441 e1000_irq_enable(adapter);
1442
1443 /* fire a link status change interrupt to start the watchdog */
1444 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
1445
1da177e4
LT		 1446 return E1000_SUCCESS;
1447
b5bf28cd 1448err_req_irq:
e0aac5a2
AK		 1449 e1000_release_hw_control(adapter);
1450 e1000_power_down_phy(adapter);
581d708e 1451 e1000_free_all_rx_resources(adapter);
1da177e4 1452err_setup_rx:
581d708e 1453 e1000_free_all_tx_resources(adapter);
1da177e4
LT		 1454err_setup_tx:
1455 e1000_reset(adapter);
1456
1457 return err;
1458}
1459
1460/**
1461 * e1000_close - Disables a network interface
1462 * @netdev: network interface device structure
1463 *
1464 * Returns 0, this is not allowed to fail
1465 *
1466 * The close entry point is called when an interface is de-activated
1467 * by the OS. The hardware is still under the drivers control, but
1468 * needs to be disabled. A global MAC reset is issued to stop the
1469 * hardware, and all transmit and receive resources are freed.
1470 **/
1471
1472static int
1473e1000_close(struct net_device *netdev)
1474{
60490fe0 1475 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 1476
2db10a08 1477 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1da177e4 1478 e1000_down(adapter);
79f05bf0 1479 e1000_power_down_phy(adapter);
2db10a08 1480 e1000_free_irq(adapter);
1da177e4 1481
581d708e
MC		 1482 e1000_free_all_tx_resources(adapter);
1483 e1000_free_all_rx_resources(adapter);
1da177e4 1484
4666560a
BA		 1485 /* kill manageability vlan ID if supported, but not if a vlan with
1486 * the same ID is registered on the host OS (let 8021q kill it) */
96838a40 1487 if ((adapter->hw.mng_cookie.status &
4666560a
BA		 1488 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1489 !(adapter->vlgrp &&
5c15bdec 1490 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
2d7edb92
MC		 1491 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1492 }
b55ccb35
JK		 1493
1494 /* If AMT is enabled, let the firmware know that the network
1495 * interface is now closed */
1496 if (adapter->hw.mac_type == e1000_82573 &&
1497 e1000_check_mng_mode(&adapter->hw))
1498 e1000_release_hw_control(adapter);
1499
1da177e4
LT		 1500 return 0;
1501}
1502
1503/**
1504 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1505 * @adapter: address of board private structure
2d7edb92
MC		 1506 * @start: address of beginning of memory
1507 * @len: length of memory
1da177e4 1508 **/
e619d523 1509static boolean_t
1da177e4
LT		 1510e1000_check_64k_bound(struct e1000_adapter *adapter,
1511 void *start, unsigned long len)
1512{
1513 unsigned long begin = (unsigned long) start;
1514 unsigned long end = begin + len;
1515
2648345f
MC		 1516 /* First rev 82545 and 82546 need to not allow any memory
1517 * write location to cross 64k boundary due to errata 23 */
1da177e4 1518 if (adapter->hw.mac_type == e1000_82545 ||
2648345f 1519 adapter->hw.mac_type == e1000_82546) {
1da177e4
LT		 1520 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1521 }
1522
1523 return TRUE;
1524}
1525
1526/**
1527 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1528 * @adapter: board private structure
581d708e 1529 * @txdr: tx descriptor ring (for a specific queue) to setup
1da177e4
LT		 1530 *
1531 * Return 0 on success, negative on failure
1532 **/
1533
3ad2cc67 1534static int
581d708e
MC		 1535e1000_setup_tx_resources(struct e1000_adapter *adapter,
1536 struct e1000_tx_ring *txdr)
1da177e4 1537{
1da177e4
LT		 1538 struct pci_dev *pdev = adapter->pdev;
1539 int size;
1540
1541 size = sizeof(struct e1000_buffer) * txdr->count;
cd94dd0b 1542 txdr->buffer_info = vmalloc(size);
96838a40 1543 if (!txdr->buffer_info) {
2648345f
MC		 1544 DPRINTK(PROBE, ERR,
1545 "Unable to allocate memory for the transmit descriptor ring\n");
1da177e4
LT		 1546 return -ENOMEM;
1547 }
1548 memset(txdr->buffer_info, 0, size);
1549
1550 /* round up to nearest 4K */
1551
1552 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
9099cfb9 1553 txdr->size = ALIGN(txdr->size, 4096);
1da177e4
LT		 1554
1555 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
96838a40 1556 if (!txdr->desc) {
1da177e4 1557setup_tx_desc_die:
1da177e4 1558 vfree(txdr->buffer_info);
2648345f
MC		 1559 DPRINTK(PROBE, ERR,
1560 "Unable to allocate memory for the transmit descriptor ring\n");
1da177e4
LT		 1561 return -ENOMEM;
1562 }
1563
2648345f 1564 /* Fix for errata 23, can't cross 64kB boundary */
1da177e4
LT		 1565 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1566 void *olddesc = txdr->desc;
1567 dma_addr_t olddma = txdr->dma;
2648345f
MC		 1568 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1569 "at %p\n", txdr->size, txdr->desc);
1570 /* Try again, without freeing the previous */
1da177e4 1571 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
2648345f 1572 /* Failed allocation, critical failure */
96838a40 1573 if (!txdr->desc) {
1da177e4
LT		 1574 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1575 goto setup_tx_desc_die;
1576 }
1577
1578 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1579 /* give up */
2648345f
MC		 1580 pci_free_consistent(pdev, txdr->size, txdr->desc,
1581 txdr->dma);
1da177e4
LT		 1582 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1583 DPRINTK(PROBE, ERR,
2648345f
MC		 1584 "Unable to allocate aligned memory "
1585 "for the transmit descriptor ring\n");
1da177e4
LT		 1586 vfree(txdr->buffer_info);
1587 return -ENOMEM;
1588 } else {
2648345f 1589 /* Free old allocation, new allocation was successful */
1da177e4
LT		 1590 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1591 }
1592 }
1593 memset(txdr->desc, 0, txdr->size);
1594
1595 txdr->next_to_use = 0;
1596 txdr->next_to_clean = 0;
2ae76d98 1597 spin_lock_init(&txdr->tx_lock);
1da177e4
LT		 1598
1599 return 0;
1600}
1601
581d708e
MC		 1602/**
1603 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1604 * (Descriptors) for all queues
1605 * @adapter: board private structure
1606 *
581d708e
MC		 1607 * Return 0 on success, negative on failure
1608 **/
1609
1610int
1611e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1612{
1613 int i, err = 0;
1614
f56799ea 1615 for (i = 0; i < adapter->num_tx_queues; i++) {
581d708e
MC		 1616 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1617 if (err) {
1618 DPRINTK(PROBE, ERR,
1619 "Allocation for Tx Queue %u failed\n", i);
3fbbc72e
VA		 1620 for (i-- ; i >= 0; i--)
1621 e1000_free_tx_resources(adapter,
1622 &adapter->tx_ring[i]);
581d708e
MC		 1623 break;
1624 }
1625 }
1626
1627 return err;
1628}
1629
1da177e4
LT		 1630/**
1631 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1632 * @adapter: board private structure
1633 *
1634 * Configure the Tx unit of the MAC after a reset.
1635 **/
1636
1637static void
1638e1000_configure_tx(struct e1000_adapter *adapter)
1639{
581d708e
MC		 1640 uint64_t tdba;
1641 struct e1000_hw *hw = &adapter->hw;
1642 uint32_t tdlen, tctl, tipg, tarc;
0fadb059 1643 uint32_t ipgr1, ipgr2;
1da177e4
LT		 1644
1645 /* Setup the HW Tx Head and Tail descriptor pointers */
1646
f56799ea 1647 switch (adapter->num_tx_queues) {
24025e4e
MC		 1648 case 1:
1649 default:
581d708e
MC		 1650 tdba = adapter->tx_ring[0].dma;
1651 tdlen = adapter->tx_ring[0].count *
1652 sizeof(struct e1000_tx_desc);
581d708e 1653 E1000_WRITE_REG(hw, TDLEN, tdlen);
4ca213a6
AK		 1654 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1655 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
581d708e 1656 E1000_WRITE_REG(hw, TDT, 0);
4ca213a6 1657 E1000_WRITE_REG(hw, TDH, 0);
6a951698
AK		 1658 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1659 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
24025e4e
MC		 1660 break;
1661 }
1da177e4
LT		 1662
1663 /* Set the default values for the Tx Inter Packet Gap timer */
d89b6c67
JB		 1664 if (adapter->hw.mac_type <= e1000_82547_rev_2 &&
1665 (hw->media_type == e1000_media_type_fiber ||
1666 hw->media_type == e1000_media_type_internal_serdes))
0fadb059
JK		 1667 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1668 else
1669 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1670
581d708e 1671 switch (hw->mac_type) {
1da177e4
LT		 1672 case e1000_82542_rev2_0:
1673 case e1000_82542_rev2_1:
1674 tipg = DEFAULT_82542_TIPG_IPGT;
0fadb059
JK		 1675 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1676 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1da177e4 1677 break;
87041639
JK		 1678 case e1000_80003es2lan:
1679 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1680 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1681 break;
1da177e4 1682 default:
0fadb059
JK		 1683 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1684 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1685 break;
1da177e4 1686 }
0fadb059
JK		 1687 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1688 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
581d708e 1689 E1000_WRITE_REG(hw, TIPG, tipg);
1da177e4
LT		 1690
1691 /* Set the Tx Interrupt Delay register */
1692
581d708e
MC		 1693 E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1694 if (hw->mac_type >= e1000_82540)
1695 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1da177e4
LT		 1696
1697 /* Program the Transmit Control Register */
1698
581d708e 1699 tctl = E1000_READ_REG(hw, TCTL);
1da177e4 1700 tctl &= ~E1000_TCTL_CT;
7e6c9861 1701 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1da177e4
LT		 1702 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1703
2ae76d98
MC		 1704 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1705 tarc = E1000_READ_REG(hw, TARC0);
90fb5135
AK		 1706 /* set the speed mode bit, we'll clear it if we're not at
1707 * gigabit link later */
09ae3e88 1708 tarc |= (1 << 21);
2ae76d98 1709 E1000_WRITE_REG(hw, TARC0, tarc);
87041639
JK		 1710 } else if (hw->mac_type == e1000_80003es2lan) {
1711 tarc = E1000_READ_REG(hw, TARC0);
1712 tarc |= 1;
87041639
JK		 1713 E1000_WRITE_REG(hw, TARC0, tarc);
1714 tarc = E1000_READ_REG(hw, TARC1);
1715 tarc |= 1;
1716 E1000_WRITE_REG(hw, TARC1, tarc);
2ae76d98
MC		 1717 }
1718
581d708e 1719 e1000_config_collision_dist(hw);
1da177e4
LT		 1720
1721 /* Setup Transmit Descriptor Settings for eop descriptor */
6a042dab
JB		 1722 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1723
1724 /* only set IDE if we are delaying interrupts using the timers */
1725 if (adapter->tx_int_delay)
1726 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1da177e4 1727
581d708e 1728 if (hw->mac_type < e1000_82543)
1da177e4
LT		 1729 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1730 else
1731 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1732
1733 /* Cache if we're 82544 running in PCI-X because we'll
1734 * need this to apply a workaround later in the send path. */
581d708e
MC		 1735 if (hw->mac_type == e1000_82544 &&
1736 hw->bus_type == e1000_bus_type_pcix)
1da177e4 1737 adapter->pcix_82544 = 1;
7e6c9861
JK		 1738
1739 E1000_WRITE_REG(hw, TCTL, tctl);
1740
1da177e4
LT		 1741}
1742
1743/**
1744 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1745 * @adapter: board private structure
581d708e 1746 * @rxdr: rx descriptor ring (for a specific queue) to setup
1da177e4
LT		 1747 *
1748 * Returns 0 on success, negative on failure
1749 **/
1750
3ad2cc67 1751static int
581d708e
MC		 1752e1000_setup_rx_resources(struct e1000_adapter *adapter,
1753 struct e1000_rx_ring *rxdr)
1da177e4 1754{
1da177e4 1755 struct pci_dev *pdev = adapter->pdev;
2d7edb92 1756 int size, desc_len;
1da177e4
LT		 1757
1758 size = sizeof(struct e1000_buffer) * rxdr->count;
cd94dd0b 1759 rxdr->buffer_info = vmalloc(size);
581d708e 1760 if (!rxdr->buffer_info) {
2648345f
MC		 1761 DPRINTK(PROBE, ERR,
1762 "Unable to allocate memory for the receive descriptor ring\n");
1da177e4
LT		 1763 return -ENOMEM;
1764 }
1765 memset(rxdr->buffer_info, 0, size);
1766
1c7e5b12
YB		 1767 rxdr->ps_page = kcalloc(rxdr->count, sizeof(struct e1000_ps_page),
1768 GFP_KERNEL);
96838a40 1769 if (!rxdr->ps_page) {
2d7edb92
MC		 1770 vfree(rxdr->buffer_info);
1771 DPRINTK(PROBE, ERR,
1772 "Unable to allocate memory for the receive descriptor ring\n");
1773 return -ENOMEM;
1774 }
2d7edb92 1775
1c7e5b12
YB		 1776 rxdr->ps_page_dma = kcalloc(rxdr->count,
1777 sizeof(struct e1000_ps_page_dma),
1778 GFP_KERNEL);
96838a40 1779 if (!rxdr->ps_page_dma) {
2d7edb92
MC		 1780 vfree(rxdr->buffer_info);
1781 kfree(rxdr->ps_page);
1782 DPRINTK(PROBE, ERR,
1783 "Unable to allocate memory for the receive descriptor ring\n");
1784 return -ENOMEM;
1785 }
2d7edb92 1786
96838a40 1787 if (adapter->hw.mac_type <= e1000_82547_rev_2)
2d7edb92
MC		 1788 desc_len = sizeof(struct e1000_rx_desc);
1789 else
1790 desc_len = sizeof(union e1000_rx_desc_packet_split);
1791
1da177e4
LT		 1792 /* Round up to nearest 4K */
1793
2d7edb92 1794 rxdr->size = rxdr->count * desc_len;
9099cfb9 1795 rxdr->size = ALIGN(rxdr->size, 4096);
1da177e4
LT		 1796
1797 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1798
581d708e
MC		 1799 if (!rxdr->desc) {
1800 DPRINTK(PROBE, ERR,
1801 "Unable to allocate memory for the receive descriptor ring\n");
1da177e4 1802setup_rx_desc_die:
1da177e4 1803 vfree(rxdr->buffer_info);
2d7edb92
MC		 1804 kfree(rxdr->ps_page);
1805 kfree(rxdr->ps_page_dma);
1da177e4
LT		 1806 return -ENOMEM;
1807 }
1808
2648345f 1809 /* Fix for errata 23, can't cross 64kB boundary */
1da177e4
LT		 1810 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1811 void *olddesc = rxdr->desc;
1812 dma_addr_t olddma = rxdr->dma;
2648345f
MC		 1813 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1814 "at %p\n", rxdr->size, rxdr->desc);
1815 /* Try again, without freeing the previous */
1da177e4 1816 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
2648345f 1817 /* Failed allocation, critical failure */
581d708e 1818 if (!rxdr->desc) {
1da177e4 1819 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
581d708e
MC		 1820 DPRINTK(PROBE, ERR,
1821 "Unable to allocate memory "
1822 "for the receive descriptor ring\n");
1da177e4
LT		 1823 goto setup_rx_desc_die;
1824 }
1825
1826 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1827 /* give up */
2648345f
MC		 1828 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1829 rxdr->dma);
1da177e4 1830 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
2648345f
MC		 1831 DPRINTK(PROBE, ERR,
1832 "Unable to allocate aligned memory "
1833 "for the receive descriptor ring\n");
581d708e 1834 goto setup_rx_desc_die;
1da177e4 1835 } else {
2648345f 1836 /* Free old allocation, new allocation was successful */
1da177e4
LT		 1837 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1838 }
1839 }
1840 memset(rxdr->desc, 0, rxdr->size);
1841
1842 rxdr->next_to_clean = 0;
1843 rxdr->next_to_use = 0;
1844
1845 return 0;
1846}
1847
581d708e
MC		 1848/**
1849 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1850 * (Descriptors) for all queues
1851 * @adapter: board private structure
1852 *
581d708e
MC		 1853 * Return 0 on success, negative on failure
1854 **/
1855
1856int
1857e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1858{
1859 int i, err = 0;
1860
f56799ea 1861 for (i = 0; i < adapter->num_rx_queues; i++) {
581d708e
MC		 1862 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1863 if (err) {
1864 DPRINTK(PROBE, ERR,
1865 "Allocation for Rx Queue %u failed\n", i);
3fbbc72e
VA		 1866 for (i-- ; i >= 0; i--)
1867 e1000_free_rx_resources(adapter,
1868 &adapter->rx_ring[i]);
581d708e
MC		 1869 break;
1870 }
1871 }
1872
1873 return err;
1874}
1875
1da177e4 1876/**
2648345f 1877 * e1000_setup_rctl - configure the receive control registers
1da177e4
LT		 1878 * @adapter: Board private structure
1879 **/
e4c811c9
MC		 1880#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1881 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1da177e4
LT		 1882static void
1883e1000_setup_rctl(struct e1000_adapter *adapter)
1884{
2d7edb92
MC		 1885 uint32_t rctl, rfctl;
1886 uint32_t psrctl = 0;
35ec56bb 1887#ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
e4c811c9
MC		 1888 uint32_t pages = 0;
1889#endif
1da177e4
LT		 1890
1891 rctl = E1000_READ_REG(&adapter->hw, RCTL);
1892
1893 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1894
1895 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1896 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1897 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1898
0fadb059 1899 if (adapter->hw.tbi_compatibility_on == 1)
1da177e4
LT		 1900 rctl |= E1000_RCTL_SBP;
1901 else
1902 rctl &= ~E1000_RCTL_SBP;
1903
2d7edb92
MC		 1904 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1905 rctl &= ~E1000_RCTL_LPE;
1906 else
1907 rctl |= E1000_RCTL_LPE;
1908
1da177e4 1909 /* Setup buffer sizes */
9e2feace
AK		 1910 rctl &= ~E1000_RCTL_SZ_4096;
1911 rctl |= E1000_RCTL_BSEX;
1912 switch (adapter->rx_buffer_len) {
1913 case E1000_RXBUFFER_256:
1914 rctl |= E1000_RCTL_SZ_256;
1915 rctl &= ~E1000_RCTL_BSEX;
1916 break;
1917 case E1000_RXBUFFER_512:
1918 rctl |= E1000_RCTL_SZ_512;
1919 rctl &= ~E1000_RCTL_BSEX;
1920 break;
1921 case E1000_RXBUFFER_1024:
1922 rctl |= E1000_RCTL_SZ_1024;
1923 rctl &= ~E1000_RCTL_BSEX;
1924 break;
a1415ee6
JK		 1925 case E1000_RXBUFFER_2048:
1926 default:
1927 rctl |= E1000_RCTL_SZ_2048;
1928 rctl &= ~E1000_RCTL_BSEX;
1929 break;
1930 case E1000_RXBUFFER_4096:
1931 rctl |= E1000_RCTL_SZ_4096;
1932 break;
1933 case E1000_RXBUFFER_8192:
1934 rctl |= E1000_RCTL_SZ_8192;
1935 break;
1936 case E1000_RXBUFFER_16384:
1937 rctl |= E1000_RCTL_SZ_16384;
1938 break;
2d7edb92
MC		 1939 }
1940
35ec56bb 1941#ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
2d7edb92
MC		 1942 /* 82571 and greater support packet-split where the protocol
1943 * header is placed in skb->data and the packet data is
1944 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1945 * In the case of a non-split, skb->data is linearly filled,
1946 * followed by the page buffers. Therefore, skb->data is
1947 * sized to hold the largest protocol header.
1948 */
e64d7d02
JB		 1949 /* allocations using alloc_page take too long for regular MTU
1950 * so only enable packet split for jumbo frames */
e4c811c9 1951 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
e64d7d02
JB		 1952 if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
1953 PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
e4c811c9
MC		 1954 adapter->rx_ps_pages = pages;
1955 else
1956 adapter->rx_ps_pages = 0;
2d7edb92 1957#endif
e4c811c9 1958 if (adapter->rx_ps_pages) {
2d7edb92
MC		 1959 /* Configure extra packet-split registers */
1960 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1961 rfctl |= E1000_RFCTL_EXTEN;
87ca4e5b
AK		 1962 /* disable packet split support for IPv6 extension headers,
1963 * because some malformed IPv6 headers can hang the RX */
1964 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
1965 E1000_RFCTL_NEW_IPV6_EXT_DIS);
1966
2d7edb92
MC		 1967 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1968
7dfee0cb 1969 rctl |= E1000_RCTL_DTYP_PS;
96838a40 1970
2d7edb92
MC		 1971 psrctl |= adapter->rx_ps_bsize0 >>
1972 E1000_PSRCTL_BSIZE0_SHIFT;
e4c811c9
MC		 1973
1974 switch (adapter->rx_ps_pages) {
1975 case 3:
1976 psrctl |= PAGE_SIZE <<
1977 E1000_PSRCTL_BSIZE3_SHIFT;
1978 case 2:
1979 psrctl |= PAGE_SIZE <<
1980 E1000_PSRCTL_BSIZE2_SHIFT;
1981 case 1:
1982 psrctl |= PAGE_SIZE >>
1983 E1000_PSRCTL_BSIZE1_SHIFT;
1984 break;
1985 }
2d7edb92
MC		 1986
1987 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1da177e4
LT		 1988 }
1989
1990 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1991}
1992
1993/**
1994 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1995 * @adapter: board private structure
1996 *
1997 * Configure the Rx unit of the MAC after a reset.
1998 **/
1999
2000static void
2001e1000_configure_rx(struct e1000_adapter *adapter)
2002{
581d708e
MC		 2003 uint64_t rdba;
2004 struct e1000_hw *hw = &adapter->hw;
2005 uint32_t rdlen, rctl, rxcsum, ctrl_ext;
2d7edb92 2006
e4c811c9 2007 if (adapter->rx_ps_pages) {
0f15a8fa 2008 /* this is a 32 byte descriptor */
581d708e 2009 rdlen = adapter->rx_ring[0].count *
2d7edb92
MC		 2010 sizeof(union e1000_rx_desc_packet_split);
2011 adapter->clean_rx = e1000_clean_rx_irq_ps;
2012 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2013 } else {
581d708e
MC		 2014 rdlen = adapter->rx_ring[0].count *
2015 sizeof(struct e1000_rx_desc);
2d7edb92
MC		 2016 adapter->clean_rx = e1000_clean_rx_irq;
2017 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2018 }
1da177e4
LT		 2019
2020 /* disable receives while setting up the descriptors */
581d708e
MC		 2021 rctl = E1000_READ_REG(hw, RCTL);
2022 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1da177e4
LT		 2023
2024 /* set the Receive Delay Timer Register */
581d708e 2025 E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1da177e4 2026
581d708e
MC		 2027 if (hw->mac_type >= e1000_82540) {
2028 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
835bb129 2029 if (adapter->itr_setting != 0)
581d708e 2030 E1000_WRITE_REG(hw, ITR,
1da177e4
LT		 2031 1000000000 / (adapter->itr * 256));
2032 }
2033
2ae76d98 2034 if (hw->mac_type >= e1000_82571) {
2ae76d98 2035 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1e613fd9 2036 /* Reset delay timers after every interrupt */
6fc7a7ec 2037 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1e613fd9 2038#ifdef CONFIG_E1000_NAPI
835bb129 2039 /* Auto-Mask interrupts upon ICR access */
1e613fd9 2040 ctrl_ext |= E1000_CTRL_EXT_IAME;
835bb129 2041 E1000_WRITE_REG(hw, IAM, 0xffffffff);
1e613fd9 2042#endif
2ae76d98
MC		 2043 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
2044 E1000_WRITE_FLUSH(hw);
2045 }
2046
581d708e
MC		 2047 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2048 * the Base and Length of the Rx Descriptor Ring */
f56799ea 2049 switch (adapter->num_rx_queues) {
24025e4e
MC		 2050 case 1:
2051 default:
581d708e 2052 rdba = adapter->rx_ring[0].dma;
581d708e 2053 E1000_WRITE_REG(hw, RDLEN, rdlen);
4ca213a6
AK		 2054 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
2055 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
581d708e 2056 E1000_WRITE_REG(hw, RDT, 0);
4ca213a6 2057 E1000_WRITE_REG(hw, RDH, 0);
6a951698
AK		 2058 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2059 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
581d708e 2060 break;
24025e4e
MC		 2061 }
2062
1da177e4 2063 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
581d708e
MC		 2064 if (hw->mac_type >= e1000_82543) {
2065 rxcsum = E1000_READ_REG(hw, RXCSUM);
96838a40 2066 if (adapter->rx_csum == TRUE) {
2d7edb92
MC		 2067 rxcsum |= E1000_RXCSUM_TUOFL;
2068
868d5309 2069 /* Enable 82571 IPv4 payload checksum for UDP fragments
2d7edb92 2070 * Must be used in conjunction with packet-split. */
96838a40
JB		 2071 if ((hw->mac_type >= e1000_82571) &&
2072 (adapter->rx_ps_pages)) {
2d7edb92
MC		 2073 rxcsum |= E1000_RXCSUM_IPPCSE;
2074 }
2075 } else {
2076 rxcsum &= ~E1000_RXCSUM_TUOFL;
2077 /* don't need to clear IPPCSE as it defaults to 0 */
2078 }
581d708e 2079 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1da177e4
LT		 2080 }
2081
21c4d5e0
AK		 2082 /* enable early receives on 82573, only takes effect if using > 2048
2083 * byte total frame size. for example only for jumbo frames */
2084#define E1000_ERT_2048 0x100
2085 if (hw->mac_type == e1000_82573)
2086 E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
2087
1da177e4 2088 /* Enable Receives */
581d708e 2089 E1000_WRITE_REG(hw, RCTL, rctl);
1da177e4
LT		 2090}
2091
2092/**
581d708e 2093 * e1000_free_tx_resources - Free Tx Resources per Queue
1da177e4 2094 * @adapter: board private structure
581d708e 2095 * @tx_ring: Tx descriptor ring for a specific queue
1da177e4
LT		 2096 *
2097 * Free all transmit software resources
2098 **/
2099
3ad2cc67 2100static void
581d708e
MC		 2101e1000_free_tx_resources(struct e1000_adapter *adapter,
2102 struct e1000_tx_ring *tx_ring)
1da177e4
LT		 2103{
2104 struct pci_dev *pdev = adapter->pdev;
2105
581d708e 2106 e1000_clean_tx_ring(adapter, tx_ring);
1da177e4 2107
581d708e
MC		 2108 vfree(tx_ring->buffer_info);
2109 tx_ring->buffer_info = NULL;
1da177e4 2110
581d708e 2111 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1da177e4 2112
581d708e
MC		 2113 tx_ring->desc = NULL;
2114}
2115
2116/**
2117 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2118 * @adapter: board private structure
2119 *
2120 * Free all transmit software resources
2121 **/
2122
2123void
2124e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2125{
2126 int i;
2127
f56799ea 2128 for (i = 0; i < adapter->num_tx_queues; i++)
581d708e 2129 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1da177e4
LT		 2130}
2131
e619d523 2132static void
1da177e4
LT		 2133e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2134 struct e1000_buffer *buffer_info)
2135{
96838a40 2136 if (buffer_info->dma) {
2648345f
MC		 2137 pci_unmap_page(adapter->pdev,
2138 buffer_info->dma,
2139 buffer_info->length,
2140 PCI_DMA_TODEVICE);
a9ebadd6 2141 buffer_info->dma = 0;
1da177e4 2142 }
a9ebadd6 2143 if (buffer_info->skb) {
1da177e4 2144 dev_kfree_skb_any(buffer_info->skb);
a9ebadd6
JB		 2145 buffer_info->skb = NULL;
2146 }
2147 /* buffer_info must be completely set up in the transmit path */
1da177e4
LT		 2148}
2149
2150/**
2151 * e1000_clean_tx_ring - Free Tx Buffers
2152 * @adapter: board private structure
581d708e 2153 * @tx_ring: ring to be cleaned
1da177e4
LT		 2154 **/
2155
2156static void
581d708e
MC		 2157e1000_clean_tx_ring(struct e1000_adapter *adapter,
2158 struct e1000_tx_ring *tx_ring)
1da177e4 2159{
1da177e4
LT		 2160 struct e1000_buffer *buffer_info;
2161 unsigned long size;
2162 unsigned int i;
2163
2164 /* Free all the Tx ring sk_buffs */
2165
96838a40 2166 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 2167 buffer_info = &tx_ring->buffer_info[i];
2168 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2169 }
2170
2171 size = sizeof(struct e1000_buffer) * tx_ring->count;
2172 memset(tx_ring->buffer_info, 0, size);
2173
2174 /* Zero out the descriptor ring */
2175
2176 memset(tx_ring->desc, 0, tx_ring->size);
2177
2178 tx_ring->next_to_use = 0;
2179 tx_ring->next_to_clean = 0;
fd803241 2180 tx_ring->last_tx_tso = 0;
1da177e4 2181
581d708e
MC		 2182 writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2183 writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2184}
2185
2186/**
2187 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2188 * @adapter: board private structure
2189 **/
2190
2191static void
2192e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2193{
2194 int i;
2195
f56799ea 2196 for (i = 0; i < adapter->num_tx_queues; i++)
581d708e 2197 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1da177e4
LT		 2198}
2199
2200/**
2201 * e1000_free_rx_resources - Free Rx Resources
2202 * @adapter: board private structure
581d708e 2203 * @rx_ring: ring to clean the resources from
1da177e4
LT		 2204 *
2205 * Free all receive software resources
2206 **/
2207
3ad2cc67 2208static void
581d708e
MC		 2209e1000_free_rx_resources(struct e1000_adapter *adapter,
2210 struct e1000_rx_ring *rx_ring)
1da177e4 2211{
1da177e4
LT		 2212 struct pci_dev *pdev = adapter->pdev;
2213
581d708e 2214 e1000_clean_rx_ring(adapter, rx_ring);
1da177e4
LT		 2215
2216 vfree(rx_ring->buffer_info);
2217 rx_ring->buffer_info = NULL;
2d7edb92
MC		 2218 kfree(rx_ring->ps_page);
2219 rx_ring->ps_page = NULL;
2220 kfree(rx_ring->ps_page_dma);
2221 rx_ring->ps_page_dma = NULL;
1da177e4
LT		 2222
2223 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2224
2225 rx_ring->desc = NULL;
2226}
2227
2228/**
581d708e 2229 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1da177e4 2230 * @adapter: board private structure
581d708e
MC		 2231 *
2232 * Free all receive software resources
2233 **/
2234
2235void
2236e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2237{
2238 int i;
2239
f56799ea 2240 for (i = 0; i < adapter->num_rx_queues; i++)
581d708e
MC		 2241 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2242}
2243
2244/**
2245 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2246 * @adapter: board private structure
2247 * @rx_ring: ring to free buffers from
1da177e4
LT		 2248 **/
2249
2250static void
581d708e
MC		 2251e1000_clean_rx_ring(struct e1000_adapter *adapter,
2252 struct e1000_rx_ring *rx_ring)
1da177e4 2253{
1da177e4 2254 struct e1000_buffer *buffer_info;
2d7edb92
MC		 2255 struct e1000_ps_page *ps_page;
2256 struct e1000_ps_page_dma *ps_page_dma;
1da177e4
LT		 2257 struct pci_dev *pdev = adapter->pdev;
2258 unsigned long size;
2d7edb92 2259 unsigned int i, j;
1da177e4
LT		 2260
2261 /* Free all the Rx ring sk_buffs */
96838a40 2262 for (i = 0; i < rx_ring->count; i++) {
1da177e4 2263 buffer_info = &rx_ring->buffer_info[i];
96838a40 2264 if (buffer_info->skb) {
1da177e4
LT		 2265 pci_unmap_single(pdev,
2266 buffer_info->dma,
2267 buffer_info->length,
2268 PCI_DMA_FROMDEVICE);
2269
2270 dev_kfree_skb(buffer_info->skb);
2271 buffer_info->skb = NULL;
997f5cbd
JK		 2272 }
2273 ps_page = &rx_ring->ps_page[i];
2274 ps_page_dma = &rx_ring->ps_page_dma[i];
2275 for (j = 0; j < adapter->rx_ps_pages; j++) {
2276 if (!ps_page->ps_page[j]) break;
2277 pci_unmap_page(pdev,
2278 ps_page_dma->ps_page_dma[j],
2279 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2280 ps_page_dma->ps_page_dma[j] = 0;
2281 put_page(ps_page->ps_page[j]);
2282 ps_page->ps_page[j] = NULL;
1da177e4
LT		 2283 }
2284 }
2285
2286 size = sizeof(struct e1000_buffer) * rx_ring->count;
2287 memset(rx_ring->buffer_info, 0, size);
2d7edb92
MC		 2288 size = sizeof(struct e1000_ps_page) * rx_ring->count;
2289 memset(rx_ring->ps_page, 0, size);
2290 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2291 memset(rx_ring->ps_page_dma, 0, size);
1da177e4
LT		 2292
2293 /* Zero out the descriptor ring */
2294
2295 memset(rx_ring->desc, 0, rx_ring->size);
2296
2297 rx_ring->next_to_clean = 0;
2298 rx_ring->next_to_use = 0;
2299
581d708e
MC		 2300 writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2301 writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2302}
2303
2304/**
2305 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2306 * @adapter: board private structure
2307 **/
2308
2309static void
2310e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2311{
2312 int i;
2313
f56799ea 2314 for (i = 0; i < adapter->num_rx_queues; i++)
581d708e 2315 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1da177e4
LT		 2316}
2317
2318/* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2319 * and memory write and invalidate disabled for certain operations
2320 */
2321static void
2322e1000_enter_82542_rst(struct e1000_adapter *adapter)
2323{
2324 struct net_device *netdev = adapter->netdev;
2325 uint32_t rctl;
2326
2327 e1000_pci_clear_mwi(&adapter->hw);
2328
2329 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2330 rctl |= E1000_RCTL_RST;
2331 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2332 E1000_WRITE_FLUSH(&adapter->hw);
2333 mdelay(5);
2334
96838a40 2335 if (netif_running(netdev))
581d708e 2336 e1000_clean_all_rx_rings(adapter);
1da177e4
LT		 2337}
2338
2339static void
2340e1000_leave_82542_rst(struct e1000_adapter *adapter)
2341{
2342 struct net_device *netdev = adapter->netdev;
2343 uint32_t rctl;
2344
2345 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2346 rctl &= ~E1000_RCTL_RST;
2347 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2348 E1000_WRITE_FLUSH(&adapter->hw);
2349 mdelay(5);
2350
96838a40 2351 if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
1da177e4
LT		 2352 e1000_pci_set_mwi(&adapter->hw);
2353
96838a40 2354 if (netif_running(netdev)) {
72d64a43
JK		 2355 /* No need to loop, because 82542 supports only 1 queue */
2356 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
7c4d3367 2357 e1000_configure_rx(adapter);
72d64a43 2358 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
1da177e4
LT		 2359 }
2360}
2361
2362/**
2363 * e1000_set_mac - Change the Ethernet Address of the NIC
2364 * @netdev: network interface device structure
2365 * @p: pointer to an address structure
2366 *
2367 * Returns 0 on success, negative on failure
2368 **/
2369
2370static int
2371e1000_set_mac(struct net_device *netdev, void *p)
2372{
60490fe0 2373 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 2374 struct sockaddr *addr = p;
2375
96838a40 2376 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 2377 return -EADDRNOTAVAIL;
2378
2379 /* 82542 2.0 needs to be in reset to write receive address registers */
2380
96838a40 2381 if (adapter->hw.mac_type == e1000_82542_rev2_0)
1da177e4
LT		 2382 e1000_enter_82542_rst(adapter);
2383
2384 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2385 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2386
2387 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2388
868d5309
MC		 2389 /* With 82571 controllers, LAA may be overwritten (with the default)
2390 * due to controller reset from the other port. */
2391 if (adapter->hw.mac_type == e1000_82571) {
2392 /* activate the work around */
2393 adapter->hw.laa_is_present = 1;
2394
96838a40
JB		 2395 /* Hold a copy of the LAA in RAR[14] This is done so that
2396 * between the time RAR[0] gets clobbered and the time it
2397 * gets fixed (in e1000_watchdog), the actual LAA is in one
868d5309 2398 * of the RARs and no incoming packets directed to this port
96838a40 2399 * are dropped. Eventaully the LAA will be in RAR[0] and
868d5309 2400 * RAR[14] */
96838a40 2401 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
868d5309
MC		 2402 E1000_RAR_ENTRIES - 1);
2403 }
2404
96838a40 2405 if (adapter->hw.mac_type == e1000_82542_rev2_0)
1da177e4
LT		 2406 e1000_leave_82542_rst(adapter);
2407
2408 return 0;
2409}
2410
2411/**
2412 * e1000_set_multi - Multicast and Promiscuous mode set
2413 * @netdev: network interface device structure
2414 *
2415 * The set_multi entry point is called whenever the multicast address
2416 * list or the network interface flags are updated. This routine is
2417 * responsible for configuring the hardware for proper multicast,
2418 * promiscuous mode, and all-multi behavior.
2419 **/
2420
2421static void
2422e1000_set_multi(struct net_device *netdev)
2423{
60490fe0 2424 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 2425 struct e1000_hw *hw = &adapter->hw;
2426 struct dev_mc_list *mc_ptr;
2427 uint32_t rctl;
2428 uint32_t hash_value;
868d5309 2429 int i, rar_entries = E1000_RAR_ENTRIES;
cd94dd0b
AK		 2430 int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2431 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2432 E1000_NUM_MTA_REGISTERS;
2433
2434 if (adapter->hw.mac_type == e1000_ich8lan)
2435 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
1da177e4 2436
868d5309
MC		 2437 /* reserve RAR[14] for LAA over-write work-around */
2438 if (adapter->hw.mac_type == e1000_82571)
2439 rar_entries--;
1da177e4 2440
2648345f
MC		 2441 /* Check for Promiscuous and All Multicast modes */
2442
1da177e4
LT		 2443 rctl = E1000_READ_REG(hw, RCTL);
2444
96838a40 2445 if (netdev->flags & IFF_PROMISC) {
1da177e4 2446 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
96838a40 2447 } else if (netdev->flags & IFF_ALLMULTI) {
1da177e4
LT		 2448 rctl |= E1000_RCTL_MPE;
2449 rctl &= ~E1000_RCTL_UPE;
2450 } else {
2451 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2452 }
2453
2454 E1000_WRITE_REG(hw, RCTL, rctl);
2455
2456 /* 82542 2.0 needs to be in reset to write receive address registers */
2457
96838a40 2458 if (hw->mac_type == e1000_82542_rev2_0)
1da177e4
LT		 2459 e1000_enter_82542_rst(adapter);
2460
2461 /* load the first 14 multicast address into the exact filters 1-14
2462 * RAR 0 is used for the station MAC adddress
2463 * if there are not 14 addresses, go ahead and clear the filters
868d5309 2464 * -- with 82571 controllers only 0-13 entries are filled here
1da177e4
LT		 2465 */
2466 mc_ptr = netdev->mc_list;
2467
96838a40 2468 for (i = 1; i < rar_entries; i++) {
868d5309 2469 if (mc_ptr) {
1da177e4
LT		 2470 e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2471 mc_ptr = mc_ptr->next;
2472 } else {
2473 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
4ca213a6 2474 E1000_WRITE_FLUSH(hw);
1da177e4 2475 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
4ca213a6 2476 E1000_WRITE_FLUSH(hw);
1da177e4
LT		 2477 }
2478 }
2479
2480 /* clear the old settings from the multicast hash table */
2481
cd94dd0b 2482 for (i = 0; i < mta_reg_count; i++) {
1da177e4 2483 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
4ca213a6
AK		 2484 E1000_WRITE_FLUSH(hw);
2485 }
1da177e4
LT		 2486
2487 /* load any remaining addresses into the hash table */
2488
96838a40 2489 for (; mc_ptr; mc_ptr = mc_ptr->next) {
1da177e4
LT		 2490 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2491 e1000_mta_set(hw, hash_value);
2492 }
2493
96838a40 2494 if (hw->mac_type == e1000_82542_rev2_0)
1da177e4 2495 e1000_leave_82542_rst(adapter);
1da177e4
LT		 2496}
2497
2498/* Need to wait a few seconds after link up to get diagnostic information from
2499 * the phy */
2500
2501static void
2502e1000_update_phy_info(unsigned long data)
2503{
2504 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2505 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2506}
2507
2508/**
2509 * e1000_82547_tx_fifo_stall - Timer Call-back
2510 * @data: pointer to adapter cast into an unsigned long
2511 **/
2512
2513static void
2514e1000_82547_tx_fifo_stall(unsigned long data)
2515{
2516 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2517 struct net_device *netdev = adapter->netdev;
2518 uint32_t tctl;
2519
96838a40
JB		 2520 if (atomic_read(&adapter->tx_fifo_stall)) {
2521 if ((E1000_READ_REG(&adapter->hw, TDT) ==
1da177e4
LT		 2522 E1000_READ_REG(&adapter->hw, TDH)) &&
2523 (E1000_READ_REG(&adapter->hw, TDFT) ==
2524 E1000_READ_REG(&adapter->hw, TDFH)) &&
2525 (E1000_READ_REG(&adapter->hw, TDFTS) ==
2526 E1000_READ_REG(&adapter->hw, TDFHS))) {
2527 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2528 E1000_WRITE_REG(&adapter->hw, TCTL,
2529 tctl & ~E1000_TCTL_EN);
2530 E1000_WRITE_REG(&adapter->hw, TDFT,
2531 adapter->tx_head_addr);
2532 E1000_WRITE_REG(&adapter->hw, TDFH,
2533 adapter->tx_head_addr);
2534 E1000_WRITE_REG(&adapter->hw, TDFTS,
2535 adapter->tx_head_addr);
2536 E1000_WRITE_REG(&adapter->hw, TDFHS,
2537 adapter->tx_head_addr);
2538 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2539 E1000_WRITE_FLUSH(&adapter->hw);
2540
2541 adapter->tx_fifo_head = 0;
2542 atomic_set(&adapter->tx_fifo_stall, 0);
2543 netif_wake_queue(netdev);
2544 } else {
2545 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2546 }
2547 }
2548}
2549
2550/**
2551 * e1000_watchdog - Timer Call-back
2552 * @data: pointer to adapter cast into an unsigned long
2553 **/
2554static void
2555e1000_watchdog(unsigned long data)
2556{
2557 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1da177e4 2558 struct net_device *netdev = adapter->netdev;
545c67c0 2559 struct e1000_tx_ring *txdr = adapter->tx_ring;
7e6c9861 2560 uint32_t link, tctl;
cd94dd0b
AK		 2561 int32_t ret_val;
2562
2563 ret_val = e1000_check_for_link(&adapter->hw);
2564 if ((ret_val == E1000_ERR_PHY) &&
2565 (adapter->hw.phy_type == e1000_phy_igp_3) &&
2566 (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2567 /* See e1000_kumeran_lock_loss_workaround() */
2568 DPRINTK(LINK, INFO,
2569 "Gigabit has been disabled, downgrading speed\n");
2570 }
90fb5135 2571
2d7edb92
MC		 2572 if (adapter->hw.mac_type == e1000_82573) {
2573 e1000_enable_tx_pkt_filtering(&adapter->hw);
96838a40 2574 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2d7edb92 2575 e1000_update_mng_vlan(adapter);
96838a40 2576 }
1da177e4 2577
96838a40 2578 if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
1da177e4
LT		 2579 !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2580 link = !adapter->hw.serdes_link_down;
2581 else
2582 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2583
96838a40
JB		 2584 if (link) {
2585 if (!netif_carrier_ok(netdev)) {
9669f53b 2586 uint32_t ctrl;
fe7fe28e 2587 boolean_t txb2b = 1;
1da177e4
LT		 2588 e1000_get_speed_and_duplex(&adapter->hw,
2589 &adapter->link_speed,
2590 &adapter->link_duplex);
2591
9669f53b
AK		 2592 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2593 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2594 "Flow Control: %s\n",
2595 adapter->link_speed,
2596 adapter->link_duplex == FULL_DUPLEX ?
2597 "Full Duplex" : "Half Duplex",
2598 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2599 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2600 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2601 E1000_CTRL_TFCE) ? "TX" : "None" )));
1da177e4 2602
7e6c9861
JK		 2603 /* tweak tx_queue_len according to speed/duplex
2604 * and adjust the timeout factor */
66a2b0a3
JK		 2605 netdev->tx_queue_len = adapter->tx_queue_len;
2606 adapter->tx_timeout_factor = 1;
7e6c9861
JK		 2607 switch (adapter->link_speed) {
2608 case SPEED_10:
fe7fe28e 2609 txb2b = 0;
7e6c9861
JK		 2610 netdev->tx_queue_len = 10;
2611 adapter->tx_timeout_factor = 8;
2612 break;
2613 case SPEED_100:
fe7fe28e 2614 txb2b = 0;
7e6c9861
JK		 2615 netdev->tx_queue_len = 100;
2616 /* maybe add some timeout factor ? */
2617 break;
2618 }
2619
fe7fe28e 2620 if ((adapter->hw.mac_type == e1000_82571 ||
7e6c9861 2621 adapter->hw.mac_type == e1000_82572) &&
fe7fe28e 2622 txb2b == 0) {
7e6c9861
JK		 2623 uint32_t tarc0;
2624 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
90fb5135 2625 tarc0 &= ~(1 << 21);
7e6c9861
JK		 2626 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2627 }
90fb5135 2628
7e6c9861
JK		 2629 /* disable TSO for pcie and 10/100 speeds, to avoid
2630 * some hardware issues */
2631 if (!adapter->tso_force &&
2632 adapter->hw.bus_type == e1000_bus_type_pci_express){
66a2b0a3
JK		 2633 switch (adapter->link_speed) {
2634 case SPEED_10:
66a2b0a3 2635 case SPEED_100:
7e6c9861
JK		 2636 DPRINTK(PROBE,INFO,
2637 "10/100 speed: disabling TSO\n");
2638 netdev->features &= ~NETIF_F_TSO;
87ca4e5b 2639 netdev->features &= ~NETIF_F_TSO6;
7e6c9861
JK		 2640 break;
2641 case SPEED_1000:
2642 netdev->features |= NETIF_F_TSO;
87ca4e5b 2643 netdev->features |= NETIF_F_TSO6;
7e6c9861
JK		 2644 break;
2645 default:
2646 /* oops */
66a2b0a3
JK		 2647 break;
2648 }
2649 }
7e6c9861
JK		 2650
2651 /* enable transmits in the hardware, need to do this
2652 * after setting TARC0 */
2653 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2654 tctl |= E1000_TCTL_EN;
2655 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
66a2b0a3 2656
1da177e4
LT		 2657 netif_carrier_on(netdev);
2658 netif_wake_queue(netdev);
56e1393f 2659 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
1da177e4 2660 adapter->smartspeed = 0;
bb8e3311
JG		 2661 } else {
2662 /* make sure the receive unit is started */
2663 if (adapter->hw.rx_needs_kicking) {
2664 struct e1000_hw *hw = &adapter->hw;
2665 uint32_t rctl = E1000_READ_REG(hw, RCTL);
2666 E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
2667 }
1da177e4
LT		 2668 }
2669 } else {
96838a40 2670 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 2671 adapter->link_speed = 0;
2672 adapter->link_duplex = 0;
2673 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2674 netif_carrier_off(netdev);
2675 netif_stop_queue(netdev);
56e1393f 2676 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
87041639
JK		 2677
2678 /* 80003ES2LAN workaround--
2679 * For packet buffer work-around on link down event;
2680 * disable receives in the ISR and
2681 * reset device here in the watchdog
2682 */
8fc897b0 2683 if (adapter->hw.mac_type == e1000_80003es2lan)
87041639
JK		 2684 /* reset device */
2685 schedule_work(&adapter->reset_task);
1da177e4
LT		 2686 }
2687
2688 e1000_smartspeed(adapter);
2689 }
2690
2691 e1000_update_stats(adapter);
2692
2693 adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2694 adapter->tpt_old = adapter->stats.tpt;
2695 adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2696 adapter->colc_old = adapter->stats.colc;
2697
2698 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2699 adapter->gorcl_old = adapter->stats.gorcl;
2700 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2701 adapter->gotcl_old = adapter->stats.gotcl;
2702
2703 e1000_update_adaptive(&adapter->hw);
2704
f56799ea 2705 if (!netif_carrier_ok(netdev)) {
581d708e 2706 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 2707 /* We've lost link, so the controller stops DMA,
2708 * but we've got queued Tx work that's never going
2709 * to get done, so reset controller to flush Tx.
2710 * (Do the reset outside of interrupt context). */
87041639
JK		 2711 adapter->tx_timeout_count++;
2712 schedule_work(&adapter->reset_task);
1da177e4
LT		 2713 }
2714 }
2715
1da177e4
LT		 2716 /* Cause software interrupt to ensure rx ring is cleaned */
2717 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2718
2648345f 2719 /* Force detection of hung controller every watchdog period */
1da177e4
LT		 2720 adapter->detect_tx_hung = TRUE;
2721
96838a40 2722 /* With 82571 controllers, LAA may be overwritten due to controller
868d5309
MC		 2723 * reset from the other port. Set the appropriate LAA in RAR[0] */
2724 if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2725 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2726
1da177e4 2727 /* Reset the timer */
56e1393f 2728 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
1da177e4
LT		 2729}
2730
835bb129
JB		 2731enum latency_range {
2732 lowest_latency = 0,
2733 low_latency = 1,
2734 bulk_latency = 2,
2735 latency_invalid = 255
2736};
2737
2738/**
2739 * e1000_update_itr - update the dynamic ITR value based on statistics
2740 * Stores a new ITR value based on packets and byte
2741 * counts during the last interrupt. The advantage of per interrupt
2742 * computation is faster updates and more accurate ITR for the current
2743 * traffic pattern. Constants in this function were computed
2744 * based on theoretical maximum wire speed and thresholds were set based
2745 * on testing data as well as attempting to minimize response time
2746 * while increasing bulk throughput.
2747 * this functionality is controlled by the InterruptThrottleRate module
2748 * parameter (see e1000_param.c)
2749 * @adapter: pointer to adapter
2750 * @itr_setting: current adapter->itr
2751 * @packets: the number of packets during this measurement interval
2752 * @bytes: the number of bytes during this measurement interval
2753 **/
2754static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2755 uint16_t itr_setting,
2756 int packets,
2757 int bytes)
2758{
2759 unsigned int retval = itr_setting;
2760 struct e1000_hw *hw = &adapter->hw;
2761
2762 if (unlikely(hw->mac_type < e1000_82540))
2763 goto update_itr_done;
2764
2765 if (packets == 0)
2766 goto update_itr_done;
2767
835bb129
JB		 2768 switch (itr_setting) {
2769 case lowest_latency:
2b65326e
JB		 2770 /* jumbo frames get bulk treatment*/
2771 if (bytes/packets > 8000)
2772 retval = bulk_latency;
2773 else if ((packets < 5) && (bytes > 512))
835bb129
JB		 2774 retval = low_latency;
2775 break;
2776 case low_latency: /* 50 usec aka 20000 ints/s */
2777 if (bytes > 10000) {
2b65326e
JB		 2778 /* jumbo frames need bulk latency setting */
2779 if (bytes/packets > 8000)
2780 retval = bulk_latency;
2781 else if ((packets < 10) || ((bytes/packets) > 1200))
835bb129
JB		 2782 retval = bulk_latency;
2783 else if ((packets > 35))
2784 retval = lowest_latency;
2b65326e
JB		 2785 } else if (bytes/packets > 2000)
2786 retval = bulk_latency;
2787 else if (packets <= 2 && bytes < 512)
835bb129
JB		 2788 retval = lowest_latency;
2789 break;
2790 case bulk_latency: /* 250 usec aka 4000 ints/s */
2791 if (bytes > 25000) {
2792 if (packets > 35)
2793 retval = low_latency;
2b65326e
JB		 2794 } else if (bytes < 6000) {
2795 retval = low_latency;
835bb129
JB		 2796 }
2797 break;
2798 }
2799
2800update_itr_done:
2801 return retval;
2802}
2803
2804static void e1000_set_itr(struct e1000_adapter *adapter)
2805{
2806 struct e1000_hw *hw = &adapter->hw;
2807 uint16_t current_itr;
2808 uint32_t new_itr = adapter->itr;
2809
2810 if (unlikely(hw->mac_type < e1000_82540))
2811 return;
2812
2813 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2814 if (unlikely(adapter->link_speed != SPEED_1000)) {
2815 current_itr = 0;
2816 new_itr = 4000;
2817 goto set_itr_now;
2818 }
2819
2820 adapter->tx_itr = e1000_update_itr(adapter,
2821 adapter->tx_itr,
2822 adapter->total_tx_packets,
2823 adapter->total_tx_bytes);
2b65326e
JB		 2824 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2825 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2826 adapter->tx_itr = low_latency;
2827
835bb129
JB		 2828 adapter->rx_itr = e1000_update_itr(adapter,
2829 adapter->rx_itr,
2830 adapter->total_rx_packets,
2831 adapter->total_rx_bytes);
2b65326e
JB		 2832 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2833 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2834 adapter->rx_itr = low_latency;
835bb129
JB		 2835
2836 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2837
835bb129
JB		 2838 switch (current_itr) {
2839 /* counts and packets in update_itr are dependent on these numbers */
2840 case lowest_latency:
2841 new_itr = 70000;
2842 break;
2843 case low_latency:
2844 new_itr = 20000; /* aka hwitr = ~200 */
2845 break;
2846 case bulk_latency:
2847 new_itr = 4000;
2848 break;
2849 default:
2850 break;
2851 }
2852
2853set_itr_now:
2854 if (new_itr != adapter->itr) {
2855 /* this attempts to bias the interrupt rate towards Bulk
2856 * by adding intermediate steps when interrupt rate is
2857 * increasing */
2858 new_itr = new_itr > adapter->itr ?
2859 min(adapter->itr + (new_itr >> 2), new_itr) :
2860 new_itr;
2861 adapter->itr = new_itr;
2862 E1000_WRITE_REG(hw, ITR, 1000000000 / (new_itr * 256));
2863 }
2864
2865 return;
2866}
2867
1da177e4
LT		 2868#define E1000_TX_FLAGS_CSUM 0x00000001
2869#define E1000_TX_FLAGS_VLAN 0x00000002
2870#define E1000_TX_FLAGS_TSO 0x00000004
2d7edb92 2871#define E1000_TX_FLAGS_IPV4 0x00000008
1da177e4
LT		 2872#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2873#define E1000_TX_FLAGS_VLAN_SHIFT 16
2874
e619d523 2875static int
581d708e
MC		 2876e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2877 struct sk_buff *skb)
1da177e4 2878{
1da177e4 2879 struct e1000_context_desc *context_desc;
545c67c0 2880 struct e1000_buffer *buffer_info;
1da177e4
LT		 2881 unsigned int i;
2882 uint32_t cmd_length = 0;
2d7edb92 2883 uint16_t ipcse = 0, tucse, mss;
1da177e4
LT		 2884 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2885 int err;
2886
89114afd 2887 if (skb_is_gso(skb)) {
1da177e4
LT		 2888 if (skb_header_cloned(skb)) {
2889 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2890 if (err)
2891 return err;
2892 }
2893
ab6a5bb6 2894 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 2895 mss = skb_shinfo(skb)->gso_size;
60828236 2896 if (skb->protocol == htons(ETH_P_IP)) {
eddc9ec5
ACM		 2897 struct iphdr *iph = ip_hdr(skb);
2898 iph->tot_len = 0;
2899 iph->check = 0;
aa8223c7
ACM		 2900 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2901 iph->daddr, 0,
2902 IPPROTO_TCP,
2903 0);
2d7edb92 2904 cmd_length = E1000_TXD_CMD_IP;
ea2ae17d 2905 ipcse = skb_transport_offset(skb) - 1;
e15fdd03 2906 } else if (skb->protocol == htons(ETH_P_IPV6)) {
0660e03f 2907 ipv6_hdr(skb)->payload_len = 0;
aa8223c7 2908 tcp_hdr(skb)->check =
0660e03f
ACM		 2909 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2910 &ipv6_hdr(skb)->daddr,
2911 0, IPPROTO_TCP, 0);
2d7edb92 2912 ipcse = 0;
2d7edb92 2913 }
bbe735e4 2914 ipcss = skb_network_offset(skb);
eddc9ec5 2915 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
ea2ae17d 2916 tucss = skb_transport_offset(skb);
aa8223c7 2917 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 2918 tucse = 0;
2919
2920 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2d7edb92 2921 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
1da177e4 2922
581d708e
MC		 2923 i = tx_ring->next_to_use;
2924 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
545c67c0 2925 buffer_info = &tx_ring->buffer_info[i];
1da177e4
LT		 2926
2927 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2928 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2929 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2930 context_desc->upper_setup.tcp_fields.tucss = tucss;
2931 context_desc->upper_setup.tcp_fields.tucso = tucso;
2932 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2933 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2934 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2935 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2936
545c67c0 2937 buffer_info->time_stamp = jiffies;
a9ebadd6 2938 buffer_info->next_to_watch = i;
545c67c0 2939
581d708e
MC		 2940 if (++i == tx_ring->count) i = 0;
2941 tx_ring->next_to_use = i;
1da177e4 2942
8241e35e 2943 return TRUE;
1da177e4 2944 }
8241e35e 2945 return FALSE;
1da177e4
LT		 2946}
2947
e619d523 2948static boolean_t
581d708e
MC		 2949e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2950 struct sk_buff *skb)
1da177e4
LT		 2951{
2952 struct e1000_context_desc *context_desc;
545c67c0 2953 struct e1000_buffer *buffer_info;
1da177e4
LT		 2954 unsigned int i;
2955 uint8_t css;
2956
84fa7933 2957 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
ea2ae17d 2958 css = skb_transport_offset(skb);
1da177e4 2959
581d708e 2960 i = tx_ring->next_to_use;
545c67c0 2961 buffer_info = &tx_ring->buffer_info[i];
581d708e 2962 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
1da177e4 2963
f6c57baf 2964 context_desc->lower_setup.ip_config = 0;
1da177e4 2965 context_desc->upper_setup.tcp_fields.tucss = css;
628592cc
HX		 2966 context_desc->upper_setup.tcp_fields.tucso =
2967 css + skb->csum_offset;
1da177e4
LT		 2968 context_desc->upper_setup.tcp_fields.tucse = 0;
2969 context_desc->tcp_seg_setup.data = 0;
2970 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2971
545c67c0 2972 buffer_info->time_stamp = jiffies;
a9ebadd6 2973 buffer_info->next_to_watch = i;
545c67c0 2974
581d708e
MC		 2975 if (unlikely(++i == tx_ring->count)) i = 0;
2976 tx_ring->next_to_use = i;
1da177e4
LT		 2977
2978 return TRUE;
2979 }
2980
2981 return FALSE;
2982}
2983
2984#define E1000_MAX_TXD_PWR 12
2985#define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2986
e619d523 2987static int
581d708e
MC		 2988e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2989 struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2990 unsigned int nr_frags, unsigned int mss)
1da177e4 2991{
1da177e4
LT		 2992 struct e1000_buffer *buffer_info;
2993 unsigned int len = skb->len;
2994 unsigned int offset = 0, size, count = 0, i;
2995 unsigned int f;
2996 len -= skb->data_len;
2997
2998 i = tx_ring->next_to_use;
2999
96838a40 3000 while (len) {
1da177e4
LT		 3001 buffer_info = &tx_ring->buffer_info[i];
3002 size = min(len, max_per_txd);
fd803241
JK		 3003 /* Workaround for Controller erratum --
3004 * descriptor for non-tso packet in a linear SKB that follows a
3005 * tso gets written back prematurely before the data is fully
0f15a8fa 3006 * DMA'd to the controller */
fd803241 3007 if (!skb->data_len && tx_ring->last_tx_tso &&
89114afd 3008 !skb_is_gso(skb)) {
fd803241
JK		 3009 tx_ring->last_tx_tso = 0;
3010 size -= 4;
3011 }
3012
1da177e4
LT		 3013 /* Workaround for premature desc write-backs
3014 * in TSO mode. Append 4-byte sentinel desc */
96838a40 3015 if (unlikely(mss && !nr_frags && size == len && size > 8))
1da177e4 3016 size -= 4;
97338bde
MC		 3017 /* work-around for errata 10 and it applies
3018 * to all controllers in PCI-X mode
3019 * The fix is to make sure that the first descriptor of a
3020 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3021 */
96838a40 3022 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
97338bde
MC		 3023 (size > 2015) && count == 0))
3024 size = 2015;
96838a40 3025
1da177e4
LT		 3026 /* Workaround for potential 82544 hang in PCI-X. Avoid
3027 * terminating buffers within evenly-aligned dwords. */
96838a40 3028 if (unlikely(adapter->pcix_82544 &&
1da177e4
LT		 3029 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3030 size > 4))
3031 size -= 4;
3032
3033 buffer_info->length = size;
3034 buffer_info->dma =
3035 pci_map_single(adapter->pdev,
3036 skb->data + offset,
3037 size,
3038 PCI_DMA_TODEVICE);
3039 buffer_info->time_stamp = jiffies;
a9ebadd6 3040 buffer_info->next_to_watch = i;
1da177e4
LT		 3041
3042 len -= size;
3043 offset += size;
3044 count++;
96838a40 3045 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4
LT		 3046 }
3047
96838a40 3048 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 3049 struct skb_frag_struct *frag;
3050
3051 frag = &skb_shinfo(skb)->frags[f];
3052 len = frag->size;
3053 offset = frag->page_offset;
3054
96838a40 3055 while (len) {
1da177e4
LT		 3056 buffer_info = &tx_ring->buffer_info[i];
3057 size = min(len, max_per_txd);
1da177e4
LT		 3058 /* Workaround for premature desc write-backs
3059 * in TSO mode. Append 4-byte sentinel desc */
96838a40 3060 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
1da177e4 3061 size -= 4;
1da177e4
LT		 3062 /* Workaround for potential 82544 hang in PCI-X.
3063 * Avoid terminating buffers within evenly-aligned
3064 * dwords. */
96838a40 3065 if (unlikely(adapter->pcix_82544 &&
1da177e4
LT		 3066 !((unsigned long)(frag->page+offset+size-1) & 4) &&
3067 size > 4))
3068 size -= 4;
3069
3070 buffer_info->length = size;
3071 buffer_info->dma =
3072 pci_map_page(adapter->pdev,
3073 frag->page,
3074 offset,
3075 size,
3076 PCI_DMA_TODEVICE);
3077 buffer_info->time_stamp = jiffies;
a9ebadd6 3078 buffer_info->next_to_watch = i;
1da177e4
LT		 3079
3080 len -= size;
3081 offset += size;
3082 count++;
96838a40 3083 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4
LT		 3084 }
3085 }
3086
3087 i = (i == 0) ? tx_ring->count - 1 : i - 1;
3088 tx_ring->buffer_info[i].skb = skb;
3089 tx_ring->buffer_info[first].next_to_watch = i;
3090
3091 return count;
3092}
3093
e619d523 3094static void
581d708e
MC		 3095e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3096 int tx_flags, int count)
1da177e4 3097{
1da177e4
LT		 3098 struct e1000_tx_desc *tx_desc = NULL;
3099 struct e1000_buffer *buffer_info;
3100 uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3101 unsigned int i;
3102
96838a40 3103 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
1da177e4
LT		 3104 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3105 E1000_TXD_CMD_TSE;
2d7edb92
MC		 3106 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3107
96838a40 3108 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2d7edb92 3109 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
1da177e4
LT		 3110 }
3111
96838a40 3112 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
1da177e4
LT		 3113 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3114 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3115 }
3116
96838a40 3117 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
1da177e4
LT		 3118 txd_lower |= E1000_TXD_CMD_VLE;
3119 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3120 }
3121
3122 i = tx_ring->next_to_use;
3123
96838a40 3124 while (count--) {
1da177e4
LT		 3125 buffer_info = &tx_ring->buffer_info[i];
3126 tx_desc = E1000_TX_DESC(*tx_ring, i);
3127 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3128 tx_desc->lower.data =
3129 cpu_to_le32(txd_lower | buffer_info->length);
3130 tx_desc->upper.data = cpu_to_le32(txd_upper);
96838a40 3131 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4
LT		 3132 }
3133
3134 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3135
3136 /* Force memory writes to complete before letting h/w
3137 * know there are new descriptors to fetch. (Only
3138 * applicable for weak-ordered memory model archs,
3139 * such as IA-64). */
3140 wmb();
3141
3142 tx_ring->next_to_use = i;
581d708e 3143 writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2ce9047f
JB		 3144 /* we need this if more than one processor can write to our tail
3145 * at a time, it syncronizes IO on IA64/Altix systems */
3146 mmiowb();
1da177e4
LT		 3147}
3148
3149/**
3150 * 82547 workaround to avoid controller hang in half-duplex environment.
3151 * The workaround is to avoid queuing a large packet that would span
3152 * the internal Tx FIFO ring boundary by notifying the stack to resend
3153 * the packet at a later time. This gives the Tx FIFO an opportunity to
3154 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3155 * to the beginning of the Tx FIFO.
3156 **/
3157
3158#define E1000_FIFO_HDR 0x10
3159#define E1000_82547_PAD_LEN 0x3E0
3160
e619d523 3161static int
1da177e4
LT		 3162e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3163{
3164 uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3165 uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3166
9099cfb9 3167 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
1da177e4 3168
96838a40 3169 if (adapter->link_duplex != HALF_DUPLEX)
1da177e4
LT		 3170 goto no_fifo_stall_required;
3171
96838a40 3172 if (atomic_read(&adapter->tx_fifo_stall))
1da177e4
LT		 3173 return 1;
3174
96838a40 3175 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
1da177e4
LT		 3176 atomic_set(&adapter->tx_fifo_stall, 1);
3177 return 1;
3178 }
3179
3180no_fifo_stall_required:
3181 adapter->tx_fifo_head += skb_fifo_len;
96838a40 3182 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
1da177e4
LT		 3183 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3184 return 0;
3185}
3186
2d7edb92 3187#define MINIMUM_DHCP_PACKET_SIZE 282
e619d523 3188static int
2d7edb92
MC		 3189e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3190{
3191 struct e1000_hw *hw = &adapter->hw;
3192 uint16_t length, offset;
96838a40
JB		 3193 if (vlan_tx_tag_present(skb)) {
3194 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2d7edb92
MC		 3195 ( adapter->hw.mng_cookie.status &
3196 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3197 return 0;
3198 }
20a44028 3199 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2d7edb92 3200 struct ethhdr *eth = (struct ethhdr *) skb->data;
96838a40
JB		 3201 if ((htons(ETH_P_IP) == eth->h_proto)) {
3202 const struct iphdr *ip =
2d7edb92 3203 (struct iphdr *)((uint8_t *)skb->data+14);
96838a40
JB		 3204 if (IPPROTO_UDP == ip->protocol) {
3205 struct udphdr *udp =
3206 (struct udphdr *)((uint8_t *)ip +
2d7edb92 3207 (ip->ihl << 2));
96838a40 3208 if (ntohs(udp->dest) == 67) {
2d7edb92
MC		 3209 offset = (uint8_t *)udp + 8 - skb->data;
3210 length = skb->len - offset;
3211
3212 return e1000_mng_write_dhcp_info(hw,
96838a40 3213 (uint8_t *)udp + 8,
2d7edb92
MC		 3214 length);
3215 }
3216 }
3217 }
3218 }
3219 return 0;
3220}
3221
65c7973f
JB		 3222static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3223{
3224 struct e1000_adapter *adapter = netdev_priv(netdev);
3225 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3226
3227 netif_stop_queue(netdev);
3228 /* Herbert's original patch had:
3229 * smp_mb__after_netif_stop_queue();
3230 * but since that doesn't exist yet, just open code it. */
3231 smp_mb();
3232
3233 /* We need to check again in a case another CPU has just
3234 * made room available. */
3235 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3236 return -EBUSY;
3237
3238 /* A reprieve! */
3239 netif_start_queue(netdev);
fcfb1224 3240 ++adapter->restart_queue;
65c7973f
JB		 3241 return 0;
3242}
3243
3244static int e1000_maybe_stop_tx(struct net_device *netdev,
3245 struct e1000_tx_ring *tx_ring, int size)
3246{
3247 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3248 return 0;
3249 return __e1000_maybe_stop_tx(netdev, size);
3250}
3251
1da177e4
LT		 3252#define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3253static int
3254e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3255{
60490fe0 3256 struct e1000_adapter *adapter = netdev_priv(netdev);
581d708e 3257 struct e1000_tx_ring *tx_ring;
1da177e4
LT		 3258 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3259 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3260 unsigned int tx_flags = 0;
3261 unsigned int len = skb->len;
3262 unsigned long flags;
3263 unsigned int nr_frags = 0;
3264 unsigned int mss = 0;
3265 int count = 0;
76c224bc 3266 int tso;
1da177e4
LT		 3267 unsigned int f;
3268 len -= skb->data_len;
3269
65c7973f
JB		 3270 /* This goes back to the question of how to logically map a tx queue
3271 * to a flow. Right now, performance is impacted slightly negatively
3272 * if using multiple tx queues. If the stack breaks away from a
3273 * single qdisc implementation, we can look at this again. */
581d708e 3274 tx_ring = adapter->tx_ring;
24025e4e 3275
581d708e 3276 if (unlikely(skb->len <= 0)) {
1da177e4
LT		 3277 dev_kfree_skb_any(skb);
3278 return NETDEV_TX_OK;
3279 }
3280
032fe6e9
JB		 3281 /* 82571 and newer doesn't need the workaround that limited descriptor
3282 * length to 4kB */
3283 if (adapter->hw.mac_type >= e1000_82571)
3284 max_per_txd = 8192;
3285
7967168c 3286 mss = skb_shinfo(skb)->gso_size;
76c224bc 3287 /* The controller does a simple calculation to
1da177e4
LT		 3288 * make sure there is enough room in the FIFO before
3289 * initiating the DMA for each buffer. The calc is:
3290 * 4 = ceil(buffer len/mss). To make sure we don't
3291 * overrun the FIFO, adjust the max buffer len if mss
3292 * drops. */
96838a40 3293 if (mss) {
9a3056da 3294 uint8_t hdr_len;
1da177e4
LT		 3295 max_per_txd = min(mss << 2, max_per_txd);
3296 max_txd_pwr = fls(max_per_txd) - 1;
9a3056da 3297
90fb5135
AK		 3298 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3299 * points to just header, pull a few bytes of payload from
3300 * frags into skb->data */
ab6a5bb6 3301 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
9f687888
JK		 3302 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
3303 switch (adapter->hw.mac_type) {
3304 unsigned int pull_size;
683a2aa3
HX		 3305 case e1000_82544:
3306 /* Make sure we have room to chop off 4 bytes,
3307 * and that the end alignment will work out to
3308 * this hardware's requirements
3309 * NOTE: this is a TSO only workaround
3310 * if end byte alignment not correct move us
3311 * into the next dword */
27a884dc 3312 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
683a2aa3
HX		 3313 break;
3314 /* fall through */
9f687888
JK		 3315 case e1000_82571:
3316 case e1000_82572:
3317 case e1000_82573:
cd94dd0b 3318 case e1000_ich8lan:
9f687888
JK		 3319 pull_size = min((unsigned int)4, skb->data_len);
3320 if (!__pskb_pull_tail(skb, pull_size)) {
a5eafce2 3321 DPRINTK(DRV, ERR,
9f687888
JK		 3322 "__pskb_pull_tail failed.\n");
3323 dev_kfree_skb_any(skb);
749dfc70 3324 return NETDEV_TX_OK;
9f687888
JK		 3325 }
3326 len = skb->len - skb->data_len;
3327 break;
3328 default:
3329 /* do nothing */
3330 break;
d74bbd3b 3331 }
9a3056da 3332 }
1da177e4
LT		 3333 }
3334
9a3056da 3335 /* reserve a descriptor for the offload context */
84fa7933 3336 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
1da177e4 3337 count++;
2648345f 3338 count++;
fd803241 3339
fd803241 3340 /* Controller Erratum workaround */
89114afd 3341 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
fd803241 3342 count++;
fd803241 3343
1da177e4
LT		 3344 count += TXD_USE_COUNT(len, max_txd_pwr);
3345
96838a40 3346 if (adapter->pcix_82544)
1da177e4
LT		 3347 count++;
3348
96838a40 3349 /* work-around for errata 10 and it applies to all controllers
97338bde
MC		 3350 * in PCI-X mode, so add one more descriptor to the count
3351 */
96838a40 3352 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
97338bde
MC		 3353 (len > 2015)))
3354 count++;
3355
1da177e4 3356 nr_frags = skb_shinfo(skb)->nr_frags;
96838a40 3357 for (f = 0; f < nr_frags; f++)
1da177e4
LT		 3358 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3359 max_txd_pwr);
96838a40 3360 if (adapter->pcix_82544)
1da177e4
LT		 3361 count += nr_frags;
3362
0f15a8fa
JK		 3363
3364 if (adapter->hw.tx_pkt_filtering &&
3365 (adapter->hw.mac_type == e1000_82573))
2d7edb92
MC		 3366 e1000_transfer_dhcp_info(adapter, skb);
3367
f50393fe 3368 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
581d708e 3369 /* Collision - tell upper layer to requeue */
581d708e 3370 return NETDEV_TX_LOCKED;
1da177e4
LT		 3371
3372 /* need: count + 2 desc gap to keep tail from touching
3373 * head, otherwise try next time */
65c7973f 3374 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
581d708e 3375 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 3376 return NETDEV_TX_BUSY;
3377 }
3378
96838a40
JB		 3379 if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3380 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
1da177e4 3381 netif_stop_queue(netdev);
1314bbf3 3382 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
581d708e 3383 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 3384 return NETDEV_TX_BUSY;
3385 }
3386 }
3387
96838a40 3388 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
1da177e4
LT		 3389 tx_flags |= E1000_TX_FLAGS_VLAN;
3390 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3391 }
3392
581d708e 3393 first = tx_ring->next_to_use;
96838a40 3394
581d708e 3395 tso = e1000_tso(adapter, tx_ring, skb);
1da177e4
LT		 3396 if (tso < 0) {
3397 dev_kfree_skb_any(skb);
581d708e 3398 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 3399 return NETDEV_TX_OK;
3400 }
3401
fd803241
JK		 3402 if (likely(tso)) {
3403 tx_ring->last_tx_tso = 1;
1da177e4 3404 tx_flags |= E1000_TX_FLAGS_TSO;
fd803241 3405 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
1da177e4
LT		 3406 tx_flags |= E1000_TX_FLAGS_CSUM;
3407
2d7edb92 3408 /* Old method was to assume IPv4 packet by default if TSO was enabled.
868d5309 3409 * 82571 hardware supports TSO capabilities for IPv6 as well...
2d7edb92 3410 * no longer assume, we must. */
60828236 3411 if (likely(skb->protocol == htons(ETH_P_IP)))
2d7edb92
MC		 3412 tx_flags |= E1000_TX_FLAGS_IPV4;
3413
581d708e
MC		 3414 e1000_tx_queue(adapter, tx_ring, tx_flags,
3415 e1000_tx_map(adapter, tx_ring, skb, first,
3416 max_per_txd, nr_frags, mss));
1da177e4
LT		 3417
3418 netdev->trans_start = jiffies;
3419
3420 /* Make sure there is space in the ring for the next send. */
65c7973f 3421 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
1da177e4 3422
581d708e 3423 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 3424 return NETDEV_TX_OK;
3425}
3426
3427/**
3428 * e1000_tx_timeout - Respond to a Tx Hang
3429 * @netdev: network interface device structure
3430 **/
3431
3432static void
3433e1000_tx_timeout(struct net_device *netdev)
3434{
60490fe0 3435 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 3436
3437 /* Do the reset outside of interrupt context */
87041639
JK		 3438 adapter->tx_timeout_count++;
3439 schedule_work(&adapter->reset_task);
1da177e4
LT		 3440}
3441
3442static void
65f27f38 3443e1000_reset_task(struct work_struct *work)
1da177e4 3444{
65f27f38
DH		 3445 struct e1000_adapter *adapter =
3446 container_of(work, struct e1000_adapter, reset_task);
1da177e4 3447
2db10a08 3448 e1000_reinit_locked(adapter);
1da177e4
LT		 3449}
3450
3451/**
3452 * e1000_get_stats - Get System Network Statistics
3453 * @netdev: network interface device structure
3454 *
3455 * Returns the address of the device statistics structure.
3456 * The statistics are actually updated from the timer callback.
3457 **/
3458
3459static struct net_device_stats *
3460e1000_get_stats(struct net_device *netdev)
3461{
60490fe0 3462 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 3463
6b7660cd 3464 /* only return the current stats */
1da177e4
LT		 3465 return &adapter->net_stats;
3466}
3467
3468/**
3469 * e1000_change_mtu - Change the Maximum Transfer Unit
3470 * @netdev: network interface device structure
3471 * @new_mtu: new value for maximum frame size
3472 *
3473 * Returns 0 on success, negative on failure
3474 **/
3475
3476static int
3477e1000_change_mtu(struct net_device *netdev, int new_mtu)
3478{
60490fe0 3479 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 3480 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
85b22eb6 3481 uint16_t eeprom_data = 0;
1da177e4 3482
96838a40
JB		 3483 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3484 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3485 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
1da177e4 3486 return -EINVAL;
2d7edb92 3487 }
1da177e4 3488
997f5cbd
JK		 3489 /* Adapter-specific max frame size limits. */
3490 switch (adapter->hw.mac_type) {
9e2feace 3491 case e1000_undefined ... e1000_82542_rev2_1:
cd94dd0b 3492 case e1000_ich8lan:
997f5cbd
JK		 3493 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3494 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
2d7edb92 3495 return -EINVAL;
2d7edb92 3496 }
997f5cbd 3497 break;
85b22eb6 3498 case e1000_82573:
249d71d6
BA		 3499 /* Jumbo Frames not supported if:
3500 * - this is not an 82573L device
3501 * - ASPM is enabled in any way (0x1A bits 3:2) */
85b22eb6
JK		 3502 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3503 &eeprom_data);
249d71d6
BA		 3504 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3505 (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
85b22eb6
JK		 3506 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3507 DPRINTK(PROBE, ERR,
3508 "Jumbo Frames not supported.\n");
3509 return -EINVAL;
3510 }
3511 break;
3512 }
249d71d6
BA		 3513 /* ERT will be enabled later to enable wire speed receives */
3514
85b22eb6 3515 /* fall through to get support */
997f5cbd
JK		 3516 case e1000_82571:
3517 case e1000_82572:
87041639 3518 case e1000_80003es2lan:
997f5cbd
JK		 3519#define MAX_STD_JUMBO_FRAME_SIZE 9234
3520 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3521 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3522 return -EINVAL;
3523 }
3524 break;
3525 default:
3526 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3527 break;
1da177e4
LT		 3528 }
3529
87f5032e 3530 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
9e2feace
AK		 3531 * means we reserve 2 more, this pushes us to allocate from the next
3532 * larger slab size
3533 * i.e. RXBUFFER_2048 --> size-4096 slab */
3534
3535 if (max_frame <= E1000_RXBUFFER_256)
3536 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3537 else if (max_frame <= E1000_RXBUFFER_512)
3538 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3539 else if (max_frame <= E1000_RXBUFFER_1024)
3540 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3541 else if (max_frame <= E1000_RXBUFFER_2048)
3542 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3543 else if (max_frame <= E1000_RXBUFFER_4096)
3544 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3545 else if (max_frame <= E1000_RXBUFFER_8192)
3546 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3547 else if (max_frame <= E1000_RXBUFFER_16384)
3548 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3549
3550 /* adjust allocation if LPE protects us, and we aren't using SBP */
9e2feace
AK		 3551 if (!adapter->hw.tbi_compatibility_on &&
3552 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3553 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3554 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
997f5cbd 3555
2d7edb92 3556 netdev->mtu = new_mtu;
83cd8279 3557 adapter->hw.max_frame_size = max_frame;
2d7edb92 3558
2db10a08
AK		 3559 if (netif_running(netdev))
3560 e1000_reinit_locked(adapter);
1da177e4 3561
1da177e4
LT		 3562 return 0;
3563}
3564
3565/**
3566 * e1000_update_stats - Update the board statistics counters
3567 * @adapter: board private structure
3568 **/
3569
3570void
3571e1000_update_stats(struct e1000_adapter *adapter)
3572{
3573 struct e1000_hw *hw = &adapter->hw;
282f33c9 3574 struct pci_dev *pdev = adapter->pdev;
1da177e4
LT		 3575 unsigned long flags;
3576 uint16_t phy_tmp;
3577
3578#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3579
282f33c9
LV		 3580 /*
3581 * Prevent stats update while adapter is being reset, or if the pci
3582 * connection is down.
3583 */
9026729b 3584 if (adapter->link_speed == 0)
282f33c9 3585 return;
81b1955e 3586 if (pci_channel_offline(pdev))
9026729b
AK		 3587 return;
3588
1da177e4
LT		 3589 spin_lock_irqsave(&adapter->stats_lock, flags);
3590
3591 /* these counters are modified from e1000_adjust_tbi_stats,
3592 * called from the interrupt context, so they must only
3593 * be written while holding adapter->stats_lock
3594 */
3595
3596 adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3597 adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3598 adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3599 adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3600 adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3601 adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3602 adapter->stats.roc += E1000_READ_REG(hw, ROC);
cd94dd0b
AK		 3603
3604 if (adapter->hw.mac_type != e1000_ich8lan) {
90fb5135
AK		 3605 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3606 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3607 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3608 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3609 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3610 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
cd94dd0b 3611 }
1da177e4
LT		 3612
3613 adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3614 adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3615 adapter->stats.scc += E1000_READ_REG(hw, SCC);
3616 adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3617 adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3618 adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3619 adapter->stats.dc += E1000_READ_REG(hw, DC);
3620 adapter->stats.sec += E1000_READ_REG(hw, SEC);
3621 adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3622 adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3623 adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3624 adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3625 adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3626 adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3627 adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3628 adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3629 adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3630 adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3631 adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3632 adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3633 adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3634 adapter->stats.torl += E1000_READ_REG(hw, TORL);
3635 adapter->stats.torh += E1000_READ_REG(hw, TORH);
3636 adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3637 adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3638 adapter->stats.tpr += E1000_READ_REG(hw, TPR);
cd94dd0b
AK		 3639
3640 if (adapter->hw.mac_type != e1000_ich8lan) {
90fb5135
AK		 3641 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3642 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3643 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3644 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3645 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3646 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
cd94dd0b
AK		 3647 }
3648
1da177e4
LT		 3649 adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3650 adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3651
3652 /* used for adaptive IFS */
3653
3654 hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3655 adapter->stats.tpt += hw->tx_packet_delta;
3656 hw->collision_delta = E1000_READ_REG(hw, COLC);
3657 adapter->stats.colc += hw->collision_delta;
3658
96838a40 3659 if (hw->mac_type >= e1000_82543) {
1da177e4
LT		 3660 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3661 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3662 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3663 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3664 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3665 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3666 }
96838a40 3667 if (hw->mac_type > e1000_82547_rev_2) {
2d7edb92
MC		 3668 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3669 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
cd94dd0b
AK		 3670
3671 if (adapter->hw.mac_type != e1000_ich8lan) {
90fb5135
AK		 3672 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3673 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3674 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3675 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3676 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3677 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3678 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
cd94dd0b 3679 }
2d7edb92 3680 }
1da177e4
LT		 3681
3682 /* Fill out the OS statistics structure */
1da177e4
LT		 3683 adapter->net_stats.rx_packets = adapter->stats.gprc;
3684 adapter->net_stats.tx_packets = adapter->stats.gptc;
3685 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3686 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3687 adapter->net_stats.multicast = adapter->stats.mprc;
3688 adapter->net_stats.collisions = adapter->stats.colc;
3689
3690 /* Rx Errors */
3691
87041639
JK		 3692 /* RLEC on some newer hardware can be incorrect so build
3693 * our own version based on RUC and ROC */
1da177e4
LT		 3694 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3695 adapter->stats.crcerrs + adapter->stats.algnerrc +
87041639
JK		 3696 adapter->stats.ruc + adapter->stats.roc +
3697 adapter->stats.cexterr;
49559854
MW		 3698 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3699 adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
1da177e4
LT		 3700 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3701 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
1da177e4
LT		 3702 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3703
3704 /* Tx Errors */
49559854
MW		 3705 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3706 adapter->net_stats.tx_errors = adapter->stats.txerrc;
1da177e4
LT		 3707 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3708 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3709 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
167fb284
JG		 3710 if (adapter->hw.bad_tx_carr_stats_fd &&
3711 adapter->link_duplex == FULL_DUPLEX) {
3712 adapter->net_stats.tx_carrier_errors = 0;
3713 adapter->stats.tncrs = 0;
3714 }
1da177e4
LT		 3715
3716 /* Tx Dropped needs to be maintained elsewhere */
3717
3718 /* Phy Stats */
96838a40
JB		 3719 if (hw->media_type == e1000_media_type_copper) {
3720 if ((adapter->link_speed == SPEED_1000) &&
1da177e4
LT		 3721 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3722 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3723 adapter->phy_stats.idle_errors += phy_tmp;
3724 }
3725
96838a40 3726 if ((hw->mac_type <= e1000_82546) &&
1da177e4
LT		 3727 (hw->phy_type == e1000_phy_m88) &&
3728 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3729 adapter->phy_stats.receive_errors += phy_tmp;
3730 }
3731
15e376b4
JG		 3732 /* Management Stats */
3733 if (adapter->hw.has_smbus) {
3734 adapter->stats.mgptc += E1000_READ_REG(hw, MGTPTC);
3735 adapter->stats.mgprc += E1000_READ_REG(hw, MGTPRC);
3736 adapter->stats.mgpdc += E1000_READ_REG(hw, MGTPDC);
3737 }
3738
1da177e4
LT		 3739 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3740}
9ac98284
JB		 3741
3742/**
3743 * e1000_intr_msi - Interrupt Handler
3744 * @irq: interrupt number
3745 * @data: pointer to a network interface device structure
3746 **/
3747
b5fc8f0c
JB		 3748static irqreturn_t
3749e1000_intr_msi(int irq, void *data)
9ac98284
JB		 3750{
3751 struct net_device *netdev = data;
3752 struct e1000_adapter *adapter = netdev_priv(netdev);
3753 struct e1000_hw *hw = &adapter->hw;
3754#ifndef CONFIG_E1000_NAPI
3755 int i;
3756#endif
b5fc8f0c 3757 uint32_t icr = E1000_READ_REG(hw, ICR);
9ac98284 3758
9ac98284 3759#ifdef CONFIG_E1000_NAPI
b5fc8f0c
JB		 3760 /* read ICR disables interrupts using IAM, so keep up with our
3761 * enable/disable accounting */
3762 atomic_inc(&adapter->irq_sem);
9ac98284 3763#endif
b5fc8f0c
JB		 3764 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3765 hw->get_link_status = 1;
3766 /* 80003ES2LAN workaround-- For packet buffer work-around on
3767 * link down event; disable receives here in the ISR and reset
3768 * adapter in watchdog */
3769 if (netif_carrier_ok(netdev) &&
3770 (adapter->hw.mac_type == e1000_80003es2lan)) {
3771 /* disable receives */
3772 uint32_t rctl = E1000_READ_REG(hw, RCTL);
3773 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
9ac98284 3774 }
b5fc8f0c
JB		 3775 /* guard against interrupt when we're going down */
3776 if (!test_bit(__E1000_DOWN, &adapter->flags))
3777 mod_timer(&adapter->watchdog_timer, jiffies + 1);
9ac98284
JB		 3778 }
3779
3780#ifdef CONFIG_E1000_NAPI
835bb129
JB		 3781 if (likely(netif_rx_schedule_prep(netdev))) {
3782 adapter->total_tx_bytes = 0;
3783 adapter->total_tx_packets = 0;
3784 adapter->total_rx_bytes = 0;
3785 adapter->total_rx_packets = 0;
9ac98284 3786 __netif_rx_schedule(netdev);
835bb129 3787 } else
9ac98284
JB		 3788 e1000_irq_enable(adapter);
3789#else
835bb129
JB		 3790 adapter->total_tx_bytes = 0;
3791 adapter->total_rx_bytes = 0;
3792 adapter->total_tx_packets = 0;
3793 adapter->total_rx_packets = 0;
3794
9ac98284
JB		 3795 for (i = 0; i < E1000_MAX_INTR; i++)
3796 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
46fcc86d 3797 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
9ac98284 3798 break;
835bb129
JB		 3799
3800 if (likely(adapter->itr_setting & 3))
3801 e1000_set_itr(adapter);
9ac98284
JB		 3802#endif
3803
3804 return IRQ_HANDLED;
3805}
1da177e4
LT		 3806
3807/**
3808 * e1000_intr - Interrupt Handler
3809 * @irq: interrupt number
3810 * @data: pointer to a network interface device structure
1da177e4
LT		 3811 **/
3812
3813static irqreturn_t
7d12e780 3814e1000_intr(int irq, void *data)
1da177e4
LT		 3815{
3816 struct net_device *netdev = data;
60490fe0 3817 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 3818 struct e1000_hw *hw = &adapter->hw;
87041639 3819 uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
1e613fd9 3820#ifndef CONFIG_E1000_NAPI
581d708e 3821 int i;
835bb129
JB		 3822#endif
3823 if (unlikely(!icr))
3824 return IRQ_NONE; /* Not our interrupt */
3825
3826#ifdef CONFIG_E1000_NAPI
3827 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3828 * not set, then the adapter didn't send an interrupt */
3829 if (unlikely(hw->mac_type >= e1000_82571 &&
3830 !(icr & E1000_ICR_INT_ASSERTED)))
3831 return IRQ_NONE;
3832
1e613fd9
JK		 3833 /* Interrupt Auto-Mask...upon reading ICR,
3834 * interrupts are masked. No need for the
3835 * IMC write, but it does mean we should
3836 * account for it ASAP. */
3837 if (likely(hw->mac_type >= e1000_82571))
3838 atomic_inc(&adapter->irq_sem);
be2b28ed 3839#endif
1da177e4 3840
96838a40 3841 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
1da177e4 3842 hw->get_link_status = 1;
87041639
JK		 3843 /* 80003ES2LAN workaround--
3844 * For packet buffer work-around on link down event;
3845 * disable receives here in the ISR and
3846 * reset adapter in watchdog
3847 */
3848 if (netif_carrier_ok(netdev) &&
3849 (adapter->hw.mac_type == e1000_80003es2lan)) {
3850 /* disable receives */
3851 rctl = E1000_READ_REG(hw, RCTL);
3852 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3853 }
1314bbf3
AK		 3854 /* guard against interrupt when we're going down */
3855 if (!test_bit(__E1000_DOWN, &adapter->flags))
3856 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1da177e4
LT		 3857 }
3858
3859#ifdef CONFIG_E1000_NAPI
1e613fd9 3860 if (unlikely(hw->mac_type < e1000_82571)) {
835bb129 3861 /* disable interrupts, without the synchronize_irq bit */
1e613fd9
JK		 3862 atomic_inc(&adapter->irq_sem);
3863 E1000_WRITE_REG(hw, IMC, ~0);
3864 E1000_WRITE_FLUSH(hw);
3865 }
835bb129
JB		 3866 if (likely(netif_rx_schedule_prep(netdev))) {
3867 adapter->total_tx_bytes = 0;
3868 adapter->total_tx_packets = 0;
3869 adapter->total_rx_bytes = 0;
3870 adapter->total_rx_packets = 0;
d3d9e484 3871 __netif_rx_schedule(netdev);
835bb129 3872 } else
90fb5135
AK		 3873 /* this really should not happen! if it does it is basically a
3874 * bug, but not a hard error, so enable ints and continue */
581d708e 3875 e1000_irq_enable(adapter);
c1605eb3 3876#else
1da177e4 3877 /* Writing IMC and IMS is needed for 82547.
96838a40
JB		 3878 * Due to Hub Link bus being occupied, an interrupt
3879 * de-assertion message is not able to be sent.
3880 * When an interrupt assertion message is generated later,
3881 * two messages are re-ordered and sent out.
3882 * That causes APIC to think 82547 is in de-assertion
3883 * state, while 82547 is in assertion state, resulting
3884 * in dead lock. Writing IMC forces 82547 into
3885 * de-assertion state.
3886 */
3887 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
1da177e4 3888 atomic_inc(&adapter->irq_sem);
2648345f 3889 E1000_WRITE_REG(hw, IMC, ~0);
1da177e4
LT		 3890 }
3891
835bb129
JB		 3892 adapter->total_tx_bytes = 0;
3893 adapter->total_rx_bytes = 0;
3894 adapter->total_tx_packets = 0;
3895 adapter->total_rx_packets = 0;
3896
96838a40
JB		 3897 for (i = 0; i < E1000_MAX_INTR; i++)
3898 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
46fcc86d 3899 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
1da177e4
LT		 3900 break;
3901
835bb129
JB		 3902 if (likely(adapter->itr_setting & 3))
3903 e1000_set_itr(adapter);
3904
96838a40 3905 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
1da177e4 3906 e1000_irq_enable(adapter);
581d708e 3907
c1605eb3 3908#endif
1da177e4
LT		 3909 return IRQ_HANDLED;
3910}
3911
3912#ifdef CONFIG_E1000_NAPI
3913/**
3914 * e1000_clean - NAPI Rx polling callback
3915 * @adapter: board private structure
3916 **/
3917
3918static int
581d708e 3919e1000_clean(struct net_device *poll_dev, int *budget)
1da177e4 3920{
581d708e
MC		 3921 struct e1000_adapter *adapter;
3922 int work_to_do = min(*budget, poll_dev->quota);
d3d9e484 3923 int tx_cleaned = 0, work_done = 0;
581d708e
MC		 3924
3925 /* Must NOT use netdev_priv macro here. */
3926 adapter = poll_dev->priv;
3927
3928 /* Keep link state information with original netdev */
d3d9e484 3929 if (!netif_carrier_ok(poll_dev))
581d708e 3930 goto quit_polling;
2648345f 3931
d3d9e484
AK		 3932 /* e1000_clean is called per-cpu. This lock protects
3933 * tx_ring[0] from being cleaned by multiple cpus
3934 * simultaneously. A failure obtaining the lock means
3935 * tx_ring[0] is currently being cleaned anyway. */
3936 if (spin_trylock(&adapter->tx_queue_lock)) {
3937 tx_cleaned = e1000_clean_tx_irq(adapter,
3938 &adapter->tx_ring[0]);
3939 spin_unlock(&adapter->tx_queue_lock);
581d708e
MC		 3940 }
3941
d3d9e484 3942 adapter->clean_rx(adapter, &adapter->rx_ring[0],
581d708e 3943 &work_done, work_to_do);
1da177e4
LT		 3944
3945 *budget -= work_done;
581d708e 3946 poll_dev->quota -= work_done;
96838a40 3947
2b02893e 3948 /* If no Tx and not enough Rx work done, exit the polling mode */
46fcc86d 3949 if ((!tx_cleaned && (work_done == 0)) ||
d3d9e484 3950 !netif_running(poll_dev)) {
581d708e 3951quit_polling:
835bb129
JB		 3952 if (likely(adapter->itr_setting & 3))
3953 e1000_set_itr(adapter);
581d708e 3954 netif_rx_complete(poll_dev);
1da177e4
LT		 3955 e1000_irq_enable(adapter);
3956 return 0;
3957 }
3958
3959 return 1;
3960}
3961
3962#endif
3963/**
3964 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3965 * @adapter: board private structure
3966 **/
3967
3968static boolean_t
581d708e
MC		 3969e1000_clean_tx_irq(struct e1000_adapter *adapter,
3970 struct e1000_tx_ring *tx_ring)
1da177e4 3971{
1da177e4
LT		 3972 struct net_device *netdev = adapter->netdev;
3973 struct e1000_tx_desc *tx_desc, *eop_desc;
3974 struct e1000_buffer *buffer_info;
3975 unsigned int i, eop;
2a1af5d7
JK		 3976#ifdef CONFIG_E1000_NAPI
3977 unsigned int count = 0;
3978#endif
46fcc86d 3979 boolean_t cleaned = FALSE;
835bb129 3980 unsigned int total_tx_bytes=0, total_tx_packets=0;
1da177e4
LT		 3981
3982 i = tx_ring->next_to_clean;
3983 eop = tx_ring->buffer_info[i].next_to_watch;
3984 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3985
581d708e 3986 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
96838a40 3987 for (cleaned = FALSE; !cleaned; ) {
1da177e4
LT		 3988 tx_desc = E1000_TX_DESC(*tx_ring, i);
3989 buffer_info = &tx_ring->buffer_info[i];
3990 cleaned = (i == eop);
3991
835bb129 3992 if (cleaned) {
2b65326e 3993 struct sk_buff *skb = buffer_info->skb;
7753b171
JB		 3994 unsigned int segs, bytecount;
3995 segs = skb_shinfo(skb)->gso_segs ?: 1;
3996 /* multiply data chunks by size of headers */
3997 bytecount = ((segs - 1) * skb_headlen(skb)) +
3998 skb->len;
2b65326e 3999 total_tx_packets += segs;
7753b171 4000 total_tx_bytes += bytecount;
835bb129 4001 }
fd803241 4002 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
a9ebadd6 4003 tx_desc->upper.data = 0;
1da177e4 4004
96838a40 4005 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4 4006 }
581d708e 4007
1da177e4
LT		 4008 eop = tx_ring->buffer_info[i].next_to_watch;
4009 eop_desc = E1000_TX_DESC(*tx_ring, eop);
2a1af5d7
JK		 4010#ifdef CONFIG_E1000_NAPI
4011#define E1000_TX_WEIGHT 64
4012 /* weight of a sort for tx, to avoid endless transmit cleanup */
46fcc86d 4013 if (count++ == E1000_TX_WEIGHT) break;
2a1af5d7 4014#endif
1da177e4
LT		 4015 }
4016
4017 tx_ring->next_to_clean = i;
4018
77b2aad5 4019#define TX_WAKE_THRESHOLD 32
65c7973f
JB		 4020 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
4021 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
4022 /* Make sure that anybody stopping the queue after this
4023 * sees the new next_to_clean.
4024 */
4025 smp_mb();
fcfb1224 4026 if (netif_queue_stopped(netdev)) {
77b2aad5 4027 netif_wake_queue(netdev);
fcfb1224
JB		 4028 ++adapter->restart_queue;
4029 }
77b2aad5 4030 }
2648345f 4031
581d708e 4032 if (adapter->detect_tx_hung) {
2648345f 4033 /* Detect a transmit hang in hardware, this serializes the
1da177e4
LT		 4034 * check with the clearing of time_stamp and movement of i */
4035 adapter->detect_tx_hung = FALSE;
392137fa
JK		 4036 if (tx_ring->buffer_info[eop].dma &&
4037 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
7e6c9861 4038 (adapter->tx_timeout_factor * HZ))
70b8f1e1 4039 && !(E1000_READ_REG(&adapter->hw, STATUS) &
392137fa 4040 E1000_STATUS_TXOFF)) {
70b8f1e1
MC		 4041
4042 /* detected Tx unit hang */
c6963ef5 4043 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
7bfa4816 4044 " Tx Queue <%lu>\n"
70b8f1e1
MC		 4045 " TDH <%x>\n"
4046 " TDT <%x>\n"
4047 " next_to_use <%x>\n"
4048 " next_to_clean <%x>\n"
4049 "buffer_info[next_to_clean]\n"
70b8f1e1
MC		 4050 " time_stamp <%lx>\n"
4051 " next_to_watch <%x>\n"
4052 " jiffies <%lx>\n"
4053 " next_to_watch.status <%x>\n",
7bfa4816
JK		 4054 (unsigned long)((tx_ring - adapter->tx_ring) /
4055 sizeof(struct e1000_tx_ring)),
581d708e
MC		 4056 readl(adapter->hw.hw_addr + tx_ring->tdh),
4057 readl(adapter->hw.hw_addr + tx_ring->tdt),
70b8f1e1 4058 tx_ring->next_to_use,
392137fa
JK		 4059 tx_ring->next_to_clean,
4060 tx_ring->buffer_info[eop].time_stamp,
70b8f1e1
MC		 4061 eop,
4062 jiffies,
4063 eop_desc->upper.fields.status);
1da177e4 4064 netif_stop_queue(netdev);
70b8f1e1 4065 }
1da177e4 4066 }
835bb129
JB		 4067 adapter->total_tx_bytes += total_tx_bytes;
4068 adapter->total_tx_packets += total_tx_packets;
1da177e4
LT		 4069 return cleaned;
4070}
4071
4072/**
4073 * e1000_rx_checksum - Receive Checksum Offload for 82543
2d7edb92
MC		 4074 * @adapter: board private structure
4075 * @status_err: receive descriptor status and error fields
4076 * @csum: receive descriptor csum field
4077 * @sk_buff: socket buffer with received data
1da177e4
LT		 4078 **/
4079
e619d523 4080static void
1da177e4 4081e1000_rx_checksum(struct e1000_adapter *adapter,
2d7edb92
MC		 4082 uint32_t status_err, uint32_t csum,
4083 struct sk_buff *skb)
1da177e4 4084{
2d7edb92
MC		 4085 uint16_t status = (uint16_t)status_err;
4086 uint8_t errors = (uint8_t)(status_err >> 24);
4087 skb->ip_summed = CHECKSUM_NONE;
4088
1da177e4 4089 /* 82543 or newer only */
96838a40 4090 if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
1da177e4 4091 /* Ignore Checksum bit is set */
96838a40 4092 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
2d7edb92 4093 /* TCP/UDP checksum error bit is set */
96838a40 4094 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
1da177e4 4095 /* let the stack verify checksum errors */
1da177e4 4096 adapter->hw_csum_err++;
2d7edb92
MC		 4097 return;
4098 }
4099 /* TCP/UDP Checksum has not been calculated */
96838a40
JB		 4100 if (adapter->hw.mac_type <= e1000_82547_rev_2) {
4101 if (!(status & E1000_RXD_STAT_TCPCS))
2d7edb92 4102 return;
1da177e4 4103 } else {
96838a40 4104 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
2d7edb92
MC		 4105 return;
4106 }
4107 /* It must be a TCP or UDP packet with a valid checksum */
4108 if (likely(status & E1000_RXD_STAT_TCPCS)) {
1da177e4
LT		 4109 /* TCP checksum is good */
4110 skb->ip_summed = CHECKSUM_UNNECESSARY;
2d7edb92
MC		 4111 } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
4112 /* IP fragment with UDP payload */
4113 /* Hardware complements the payload checksum, so we undo it
4114 * and then put the value in host order for further stack use.
4115 */
4116 csum = ntohl(csum ^ 0xFFFF);
4117 skb->csum = csum;
84fa7933 4118 skb->ip_summed = CHECKSUM_COMPLETE;
1da177e4 4119 }
2d7edb92 4120 adapter->hw_csum_good++;
1da177e4
LT		 4121}
4122
4123/**
2d7edb92 4124 * e1000_clean_rx_irq - Send received data up the network stack; legacy
1da177e4
LT		 4125 * @adapter: board private structure
4126 **/
4127
4128static boolean_t
4129#ifdef CONFIG_E1000_NAPI
581d708e
MC		 4130e1000_clean_rx_irq(struct e1000_adapter *adapter,
4131 struct e1000_rx_ring *rx_ring,
4132 int *work_done, int work_to_do)
1da177e4 4133#else
581d708e
MC		 4134e1000_clean_rx_irq(struct e1000_adapter *adapter,
4135 struct e1000_rx_ring *rx_ring)
1da177e4
LT		 4136#endif
4137{
1da177e4
LT		 4138 struct net_device *netdev = adapter->netdev;
4139 struct pci_dev *pdev = adapter->pdev;
86c3d59f
JB		 4140 struct e1000_rx_desc *rx_desc, *next_rxd;
4141 struct e1000_buffer *buffer_info, *next_buffer;
1da177e4
LT		 4142 unsigned long flags;
4143 uint32_t length;
4144 uint8_t last_byte;
4145 unsigned int i;
72d64a43 4146 int cleaned_count = 0;
a1415ee6 4147 boolean_t cleaned = FALSE;
835bb129 4148 unsigned int total_rx_bytes=0, total_rx_packets=0;
1da177e4
LT		 4149
4150 i = rx_ring->next_to_clean;
4151 rx_desc = E1000_RX_DESC(*rx_ring, i);
b92ff8ee 4152 buffer_info = &rx_ring->buffer_info[i];
1da177e4 4153
b92ff8ee 4154 while (rx_desc->status & E1000_RXD_STAT_DD) {
24f476ee 4155 struct sk_buff *skb;
a292ca6e 4156 u8 status;
90fb5135 4157
1da177e4 4158#ifdef CONFIG_E1000_NAPI
96838a40 4159 if (*work_done >= work_to_do)
1da177e4
LT		 4160 break;
4161 (*work_done)++;
4162#endif
a292ca6e 4163 status = rx_desc->status;
b92ff8ee 4164 skb = buffer_info->skb;
86c3d59f
JB		 4165 buffer_info->skb = NULL;
4166
30320be8
JK		 4167 prefetch(skb->data - NET_IP_ALIGN);
4168
86c3d59f
JB		 4169 if (++i == rx_ring->count) i = 0;
4170 next_rxd = E1000_RX_DESC(*rx_ring, i);
30320be8
JK		 4171 prefetch(next_rxd);
4172
86c3d59f 4173 next_buffer = &rx_ring->buffer_info[i];
86c3d59f 4174
72d64a43
JK		 4175 cleaned = TRUE;
4176 cleaned_count++;
a292ca6e
JK		 4177 pci_unmap_single(pdev,
4178 buffer_info->dma,
4179 buffer_info->length,
1da177e4
LT		 4180 PCI_DMA_FROMDEVICE);
4181
1da177e4
LT		 4182 length = le16_to_cpu(rx_desc->length);
4183
a1415ee6
JK		 4184 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4185 /* All receives must fit into a single buffer */
4186 E1000_DBG("%s: Receive packet consumed multiple"
4187 " buffers\n", netdev->name);
864c4e45 4188 /* recycle */
8fc897b0 4189 buffer_info->skb = skb;
1da177e4
LT		 4190 goto next_desc;
4191 }
4192
96838a40 4193 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
1da177e4 4194 last_byte = *(skb->data + length - 1);
b92ff8ee 4195 if (TBI_ACCEPT(&adapter->hw, status,
1da177e4
LT		 4196 rx_desc->errors, length, last_byte)) {
4197 spin_lock_irqsave(&adapter->stats_lock, flags);
a292ca6e
JK		 4198 e1000_tbi_adjust_stats(&adapter->hw,
4199 &adapter->stats,
1da177e4
LT		 4200 length, skb->data);
4201 spin_unlock_irqrestore(&adapter->stats_lock,
4202 flags);
4203 length--;
4204 } else {
9e2feace
AK		 4205 /* recycle */
4206 buffer_info->skb = skb;
1da177e4
LT		 4207 goto next_desc;
4208 }
1cb5821f 4209 }
1da177e4 4210
d2a1e213
JB		 4211 /* adjust length to remove Ethernet CRC, this must be
4212 * done after the TBI_ACCEPT workaround above */
4213 length -= 4;
4214
835bb129
JB		 4215 /* probably a little skewed due to removing CRC */
4216 total_rx_bytes += length;
4217 total_rx_packets++;
4218
a292ca6e
JK		 4219 /* code added for copybreak, this should improve
4220 * performance for small packets with large amounts
4221 * of reassembly being done in the stack */
1f753861 4222 if (length < copybreak) {
a292ca6e 4223 struct sk_buff *new_skb =
87f5032e 4224 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
a292ca6e
JK		 4225 if (new_skb) {
4226 skb_reserve(new_skb, NET_IP_ALIGN);
27d7ff46
ACM		 4227 skb_copy_to_linear_data_offset(new_skb,
4228 -NET_IP_ALIGN,
4229 (skb->data -
4230 NET_IP_ALIGN),
4231 (length +
4232 NET_IP_ALIGN));
a292ca6e
JK		 4233 /* save the skb in buffer_info as good */
4234 buffer_info->skb = skb;
4235 skb = new_skb;
a292ca6e 4236 }
996695de
AK		 4237 /* else just continue with the old one */
4238 }
a292ca6e 4239 /* end copybreak code */
996695de 4240 skb_put(skb, length);
1da177e4
LT		 4241
4242 /* Receive Checksum Offload */
a292ca6e
JK		 4243 e1000_rx_checksum(adapter,
4244 (uint32_t)(status) |
2d7edb92 4245 ((uint32_t)(rx_desc->errors) << 24),
c3d7a3a4 4246 le16_to_cpu(rx_desc->csum), skb);
96838a40 4247
1da177e4
LT		 4248 skb->protocol = eth_type_trans(skb, netdev);
4249#ifdef CONFIG_E1000_NAPI
96838a40 4250 if (unlikely(adapter->vlgrp &&
a292ca6e 4251 (status & E1000_RXD_STAT_VP))) {
1da177e4 4252 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2d7edb92
MC		 4253 le16_to_cpu(rx_desc->special) &
4254 E1000_RXD_SPC_VLAN_MASK);
1da177e4
LT		 4255 } else {
4256 netif_receive_skb(skb);
4257 }
4258#else /* CONFIG_E1000_NAPI */
96838a40 4259 if (unlikely(adapter->vlgrp &&
b92ff8ee 4260 (status & E1000_RXD_STAT_VP))) {
1da177e4
LT		 4261 vlan_hwaccel_rx(skb, adapter->vlgrp,
4262 le16_to_cpu(rx_desc->special) &
4263 E1000_RXD_SPC_VLAN_MASK);
4264 } else {
4265 netif_rx(skb);
4266 }
4267#endif /* CONFIG_E1000_NAPI */
4268 netdev->last_rx = jiffies;
4269
4270next_desc:
4271 rx_desc->status = 0;
1da177e4 4272
72d64a43
JK		 4273 /* return some buffers to hardware, one at a time is too slow */
4274 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4275 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4276 cleaned_count = 0;
4277 }
4278
30320be8 4279 /* use prefetched values */
86c3d59f
JB		 4280 rx_desc = next_rxd;
4281 buffer_info = next_buffer;
1da177e4 4282 }
1da177e4 4283 rx_ring->next_to_clean = i;
72d64a43
JK		 4284
4285 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4286 if (cleaned_count)
4287 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
2d7edb92 4288
835bb129
JB		 4289 adapter->total_rx_packets += total_rx_packets;
4290 adapter->total_rx_bytes += total_rx_bytes;
2d7edb92
MC		 4291 return cleaned;
4292}
4293
4294/**
4295 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4296 * @adapter: board private structure
4297 **/
4298
4299static boolean_t
4300#ifdef CONFIG_E1000_NAPI
581d708e
MC		 4301e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4302 struct e1000_rx_ring *rx_ring,
4303 int *work_done, int work_to_do)
2d7edb92 4304#else
581d708e
MC		 4305e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4306 struct e1000_rx_ring *rx_ring)
2d7edb92
MC		 4307#endif
4308{
86c3d59f 4309 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
2d7edb92
MC		 4310 struct net_device *netdev = adapter->netdev;
4311 struct pci_dev *pdev = adapter->pdev;
86c3d59f 4312 struct e1000_buffer *buffer_info, *next_buffer;
2d7edb92
MC		 4313 struct e1000_ps_page *ps_page;
4314 struct e1000_ps_page_dma *ps_page_dma;
24f476ee 4315 struct sk_buff *skb;
2d7edb92
MC		 4316 unsigned int i, j;
4317 uint32_t length, staterr;
72d64a43 4318 int cleaned_count = 0;
2d7edb92 4319 boolean_t cleaned = FALSE;
835bb129 4320 unsigned int total_rx_bytes=0, total_rx_packets=0;
2d7edb92
MC		 4321
4322 i = rx_ring->next_to_clean;
4323 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
683a38f3 4324 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
9e2feace 4325 buffer_info = &rx_ring->buffer_info[i];
2d7edb92 4326
96838a40 4327 while (staterr & E1000_RXD_STAT_DD) {
2d7edb92
MC		 4328 ps_page = &rx_ring->ps_page[i];
4329 ps_page_dma = &rx_ring->ps_page_dma[i];
4330#ifdef CONFIG_E1000_NAPI
96838a40 4331 if (unlikely(*work_done >= work_to_do))
2d7edb92
MC		 4332 break;
4333 (*work_done)++;
4334#endif
86c3d59f
JB		 4335 skb = buffer_info->skb;
4336
30320be8
JK		 4337 /* in the packet split case this is header only */
4338 prefetch(skb->data - NET_IP_ALIGN);
4339
86c3d59f
JB		 4340 if (++i == rx_ring->count) i = 0;
4341 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
30320be8
JK		 4342 prefetch(next_rxd);
4343
86c3d59f 4344 next_buffer = &rx_ring->buffer_info[i];
86c3d59f 4345
2d7edb92 4346 cleaned = TRUE;
72d64a43 4347 cleaned_count++;
2d7edb92
MC		 4348 pci_unmap_single(pdev, buffer_info->dma,
4349 buffer_info->length,
4350 PCI_DMA_FROMDEVICE);
4351
96838a40 4352 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
2d7edb92
MC		 4353 E1000_DBG("%s: Packet Split buffers didn't pick up"
4354 " the full packet\n", netdev->name);
4355 dev_kfree_skb_irq(skb);
4356 goto next_desc;
4357 }
1da177e4 4358
96838a40 4359 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
2d7edb92
MC		 4360 dev_kfree_skb_irq(skb);
4361 goto next_desc;
4362 }
4363
4364 length = le16_to_cpu(rx_desc->wb.middle.length0);
4365
96838a40 4366 if (unlikely(!length)) {
2d7edb92
MC		 4367 E1000_DBG("%s: Last part of the packet spanning"
4368 " multiple descriptors\n", netdev->name);
4369 dev_kfree_skb_irq(skb);
4370 goto next_desc;
4371 }
4372
4373 /* Good Receive */
4374 skb_put(skb, length);
4375
dc7c6add
JK		 4376 {
4377 /* this looks ugly, but it seems compiler issues make it
4378 more efficient than reusing j */
4379 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4380
4381 /* page alloc/put takes too long and effects small packet
4382 * throughput, so unsplit small packets and save the alloc/put*/
1f753861 4383 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
dc7c6add 4384 u8 *vaddr;
76c224bc 4385 /* there is no documentation about how to call
dc7c6add
JK		 4386 * kmap_atomic, so we can't hold the mapping
4387 * very long */
4388 pci_dma_sync_single_for_cpu(pdev,
4389 ps_page_dma->ps_page_dma[0],
4390 PAGE_SIZE,
4391 PCI_DMA_FROMDEVICE);
4392 vaddr = kmap_atomic(ps_page->ps_page[0],
4393 KM_SKB_DATA_SOFTIRQ);
27a884dc 4394 memcpy(skb_tail_pointer(skb), vaddr, l1);
dc7c6add
JK		 4395 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4396 pci_dma_sync_single_for_device(pdev,
4397 ps_page_dma->ps_page_dma[0],
4398 PAGE_SIZE, PCI_DMA_FROMDEVICE);
f235a2ab
AK		 4399 /* remove the CRC */
4400 l1 -= 4;
dc7c6add 4401 skb_put(skb, l1);
dc7c6add
JK		 4402 goto copydone;
4403 } /* if */
4404 }
90fb5135 4405
96838a40 4406 for (j = 0; j < adapter->rx_ps_pages; j++) {
30320be8 4407 if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
2d7edb92 4408 break;
2d7edb92
MC		 4409 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4410 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4411 ps_page_dma->ps_page_dma[j] = 0;
329bfd0b
JK		 4412 skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4413 length);
2d7edb92 4414 ps_page->ps_page[j] = NULL;
2d7edb92
MC		 4415 skb->len += length;
4416 skb->data_len += length;
5d51b80f 4417 skb->truesize += length;
2d7edb92
MC		 4418 }
4419
f235a2ab
AK		 4420 /* strip the ethernet crc, problem is we're using pages now so
4421 * this whole operation can get a little cpu intensive */
4422 pskb_trim(skb, skb->len - 4);
4423
dc7c6add 4424copydone:
835bb129
JB		 4425 total_rx_bytes += skb->len;
4426 total_rx_packets++;
4427
2d7edb92 4428 e1000_rx_checksum(adapter, staterr,
c3d7a3a4 4429 le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
2d7edb92
MC		 4430 skb->protocol = eth_type_trans(skb, netdev);
4431
96838a40 4432 if (likely(rx_desc->wb.upper.header_status &
c3d7a3a4 4433 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
e4c811c9 4434 adapter->rx_hdr_split++;
2d7edb92 4435#ifdef CONFIG_E1000_NAPI
96838a40 4436 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
2d7edb92 4437 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
683a38f3
MC		 4438 le16_to_cpu(rx_desc->wb.middle.vlan) &
4439 E1000_RXD_SPC_VLAN_MASK);
2d7edb92
MC		 4440 } else {
4441 netif_receive_skb(skb);
4442 }
4443#else /* CONFIG_E1000_NAPI */
96838a40 4444 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
2d7edb92 4445 vlan_hwaccel_rx(skb, adapter->vlgrp,
683a38f3
MC		 4446 le16_to_cpu(rx_desc->wb.middle.vlan) &
4447 E1000_RXD_SPC_VLAN_MASK);
2d7edb92
MC		 4448 } else {
4449 netif_rx(skb);
4450 }
4451#endif /* CONFIG_E1000_NAPI */
4452 netdev->last_rx = jiffies;
4453
4454next_desc:
c3d7a3a4 4455 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
2d7edb92 4456 buffer_info->skb = NULL;
2d7edb92 4457
72d64a43
JK		 4458 /* return some buffers to hardware, one at a time is too slow */
4459 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4460 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4461 cleaned_count = 0;
4462 }
4463
30320be8 4464 /* use prefetched values */
86c3d59f
JB		 4465 rx_desc = next_rxd;
4466 buffer_info = next_buffer;
4467
683a38f3 4468 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
2d7edb92
MC		 4469 }
4470 rx_ring->next_to_clean = i;
72d64a43
JK		 4471
4472 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4473 if (cleaned_count)
4474 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
1da177e4 4475
835bb129
JB		 4476 adapter->total_rx_packets += total_rx_packets;
4477 adapter->total_rx_bytes += total_rx_bytes;
1da177e4
LT		 4478 return cleaned;
4479}
4480
4481/**
2d7edb92 4482 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
1da177e4
LT		 4483 * @adapter: address of board private structure
4484 **/
4485
4486static void
581d708e 4487e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
72d64a43 4488 struct e1000_rx_ring *rx_ring,
a292ca6e 4489 int cleaned_count)
1da177e4 4490{
1da177e4
LT		 4491 struct net_device *netdev = adapter->netdev;
4492 struct pci_dev *pdev = adapter->pdev;
4493 struct e1000_rx_desc *rx_desc;
4494 struct e1000_buffer *buffer_info;
4495 struct sk_buff *skb;
2648345f
MC		 4496 unsigned int i;
4497 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
1da177e4
LT		 4498
4499 i = rx_ring->next_to_use;
4500 buffer_info = &rx_ring->buffer_info[i];
4501
a292ca6e 4502 while (cleaned_count--) {
ca6f7224
CH		 4503 skb = buffer_info->skb;
4504 if (skb) {
a292ca6e
JK		 4505 skb_trim(skb, 0);
4506 goto map_skb;
4507 }
4508
ca6f7224 4509 skb = netdev_alloc_skb(netdev, bufsz);
96838a40 4510 if (unlikely(!skb)) {
1da177e4 4511 /* Better luck next round */
72d64a43 4512 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 4513 break;
4514 }
4515
2648345f 4516 /* Fix for errata 23, can't cross 64kB boundary */
1da177e4
LT		 4517 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4518 struct sk_buff *oldskb = skb;
2648345f
MC		 4519 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4520 "at %p\n", bufsz, skb->data);
4521 /* Try again, without freeing the previous */
87f5032e 4522 skb = netdev_alloc_skb(netdev, bufsz);
2648345f 4523 /* Failed allocation, critical failure */
1da177e4
LT		 4524 if (!skb) {
4525 dev_kfree_skb(oldskb);
4526 break;
4527 }
2648345f 4528
1da177e4
LT		 4529 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4530 /* give up */
4531 dev_kfree_skb(skb);
4532 dev_kfree_skb(oldskb);
4533 break; /* while !buffer_info->skb */
1da177e4 4534 }
ca6f7224
CH		 4535
4536 /* Use new allocation */
4537 dev_kfree_skb(oldskb);
1da177e4 4538 }
1da177e4
LT		 4539 /* Make buffer alignment 2 beyond a 16 byte boundary
4540 * this will result in a 16 byte aligned IP header after
4541 * the 14 byte MAC header is removed
4542 */
4543 skb_reserve(skb, NET_IP_ALIGN);
4544
1da177e4
LT		 4545 buffer_info->skb = skb;
4546 buffer_info->length = adapter->rx_buffer_len;
a292ca6e 4547map_skb:
1da177e4
LT		 4548 buffer_info->dma = pci_map_single(pdev,
4549 skb->data,
4550 adapter->rx_buffer_len,
4551 PCI_DMA_FROMDEVICE);
4552
2648345f
MC		 4553 /* Fix for errata 23, can't cross 64kB boundary */
4554 if (!e1000_check_64k_bound(adapter,
4555 (void *)(unsigned long)buffer_info->dma,
4556 adapter->rx_buffer_len)) {
4557 DPRINTK(RX_ERR, ERR,
4558 "dma align check failed: %u bytes at %p\n",
4559 adapter->rx_buffer_len,
4560 (void *)(unsigned long)buffer_info->dma);
1da177e4
LT		 4561 dev_kfree_skb(skb);
4562 buffer_info->skb = NULL;
4563
2648345f 4564 pci_unmap_single(pdev, buffer_info->dma,
1da177e4
LT		 4565 adapter->rx_buffer_len,
4566 PCI_DMA_FROMDEVICE);
4567
4568 break; /* while !buffer_info->skb */
4569 }
1da177e4
LT		 4570 rx_desc = E1000_RX_DESC(*rx_ring, i);
4571 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4572
96838a40
JB		 4573 if (unlikely(++i == rx_ring->count))
4574 i = 0;
1da177e4
LT		 4575 buffer_info = &rx_ring->buffer_info[i];
4576 }
4577
b92ff8ee
JB		 4578 if (likely(rx_ring->next_to_use != i)) {
4579 rx_ring->next_to_use = i;
4580 if (unlikely(i-- == 0))
4581 i = (rx_ring->count - 1);
4582
4583 /* Force memory writes to complete before letting h/w
4584 * know there are new descriptors to fetch. (Only
4585 * applicable for weak-ordered memory model archs,
4586 * such as IA-64). */
4587 wmb();
4588 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4589 }
1da177e4
LT		 4590}
4591
2d7edb92
MC		 4592/**
4593 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4594 * @adapter: address of board private structure
4595 **/
4596
4597static void
581d708e 4598e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
72d64a43
JK		 4599 struct e1000_rx_ring *rx_ring,
4600 int cleaned_count)
2d7edb92 4601{
2d7edb92
MC		 4602 struct net_device *netdev = adapter->netdev;
4603 struct pci_dev *pdev = adapter->pdev;
4604 union e1000_rx_desc_packet_split *rx_desc;
4605 struct e1000_buffer *buffer_info;
4606 struct e1000_ps_page *ps_page;
4607 struct e1000_ps_page_dma *ps_page_dma;
4608 struct sk_buff *skb;
4609 unsigned int i, j;
4610
4611 i = rx_ring->next_to_use;
4612 buffer_info = &rx_ring->buffer_info[i];
4613 ps_page = &rx_ring->ps_page[i];
4614 ps_page_dma = &rx_ring->ps_page_dma[i];
4615
72d64a43 4616 while (cleaned_count--) {
2d7edb92
MC		 4617 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4618
96838a40 4619 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
e4c811c9
MC		 4620 if (j < adapter->rx_ps_pages) {
4621 if (likely(!ps_page->ps_page[j])) {
4622 ps_page->ps_page[j] =
4623 alloc_page(GFP_ATOMIC);
b92ff8ee
JB		 4624 if (unlikely(!ps_page->ps_page[j])) {
4625 adapter->alloc_rx_buff_failed++;
e4c811c9 4626 goto no_buffers;
b92ff8ee 4627 }
e4c811c9
MC		 4628 ps_page_dma->ps_page_dma[j] =
4629 pci_map_page(pdev,
4630 ps_page->ps_page[j],
4631 0, PAGE_SIZE,
4632 PCI_DMA_FROMDEVICE);
4633 }
4634 /* Refresh the desc even if buffer_addrs didn't
96838a40 4635 * change because each write-back erases
e4c811c9
MC		 4636 * this info.
4637 */
4638 rx_desc->read.buffer_addr[j+1] =
4639 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4640 } else
4641 rx_desc->read.buffer_addr[j+1] = ~0;
2d7edb92
MC		 4642 }
4643
87f5032e 4644 skb = netdev_alloc_skb(netdev,
90fb5135 4645 adapter->rx_ps_bsize0 + NET_IP_ALIGN);
2d7edb92 4646
b92ff8ee
JB		 4647 if (unlikely(!skb)) {
4648 adapter->alloc_rx_buff_failed++;
2d7edb92 4649 break;
b92ff8ee 4650 }
2d7edb92
MC		 4651
4652 /* Make buffer alignment 2 beyond a 16 byte boundary
4653 * this will result in a 16 byte aligned IP header after
4654 * the 14 byte MAC header is removed
4655 */
4656 skb_reserve(skb, NET_IP_ALIGN);
4657
2d7edb92
MC		 4658 buffer_info->skb = skb;
4659 buffer_info->length = adapter->rx_ps_bsize0;
4660 buffer_info->dma = pci_map_single(pdev, skb->data,
4661 adapter->rx_ps_bsize0,
4662 PCI_DMA_FROMDEVICE);
4663
4664 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4665
96838a40 4666 if (unlikely(++i == rx_ring->count)) i = 0;
2d7edb92
MC		 4667 buffer_info = &rx_ring->buffer_info[i];
4668 ps_page = &rx_ring->ps_page[i];
4669 ps_page_dma = &rx_ring->ps_page_dma[i];
4670 }
4671
4672no_buffers:
b92ff8ee
JB		 4673 if (likely(rx_ring->next_to_use != i)) {
4674 rx_ring->next_to_use = i;
4675 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4676
4677 /* Force memory writes to complete before letting h/w
4678 * know there are new descriptors to fetch. (Only
4679 * applicable for weak-ordered memory model archs,
4680 * such as IA-64). */
4681 wmb();
4682 /* Hardware increments by 16 bytes, but packet split
4683 * descriptors are 32 bytes...so we increment tail
4684 * twice as much.
4685 */
4686 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4687 }
2d7edb92
MC		 4688}
4689
1da177e4
LT		 4690/**
4691 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4692 * @adapter:
4693 **/
4694
4695static void
4696e1000_smartspeed(struct e1000_adapter *adapter)
4697{
4698 uint16_t phy_status;
4699 uint16_t phy_ctrl;
4700
96838a40 4701 if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
1da177e4
LT		 4702 !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4703 return;
4704
96838a40 4705 if (adapter->smartspeed == 0) {
1da177e4
LT		 4706 /* If Master/Slave config fault is asserted twice,
4707 * we assume back-to-back */
4708 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
96838a40 4709 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
1da177e4 4710 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
96838a40 4711 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
1da177e4 4712 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
96838a40 4713 if (phy_ctrl & CR_1000T_MS_ENABLE) {
1da177e4
LT		 4714 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4715 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4716 phy_ctrl);
4717 adapter->smartspeed++;
96838a40 4718 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
1da177e4
LT		 4719 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4720 &phy_ctrl)) {
4721 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4722 MII_CR_RESTART_AUTO_NEG);
4723 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4724 phy_ctrl);
4725 }
4726 }
4727 return;
96838a40 4728 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
1da177e4
LT		 4729 /* If still no link, perhaps using 2/3 pair cable */
4730 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4731 phy_ctrl |= CR_1000T_MS_ENABLE;
4732 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
96838a40 4733 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
1da177e4
LT		 4734 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4735 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4736 MII_CR_RESTART_AUTO_NEG);
4737 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4738 }
4739 }
4740 /* Restart process after E1000_SMARTSPEED_MAX iterations */
96838a40 4741 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
1da177e4
LT		 4742 adapter->smartspeed = 0;
4743}
4744
4745/**
4746 * e1000_ioctl -
4747 * @netdev:
4748 * @ifreq:
4749 * @cmd:
4750 **/
4751
4752static int
4753e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4754{
4755 switch (cmd) {
4756 case SIOCGMIIPHY:
4757 case SIOCGMIIREG:
4758 case SIOCSMIIREG:
4759 return e1000_mii_ioctl(netdev, ifr, cmd);
4760 default:
4761 return -EOPNOTSUPP;
4762 }
4763}
4764
4765/**
4766 * e1000_mii_ioctl -
4767 * @netdev:
4768 * @ifreq:
4769 * @cmd:
4770 **/
4771
4772static int
4773e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4774{
60490fe0 4775 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 4776 struct mii_ioctl_data *data = if_mii(ifr);
4777 int retval;
4778 uint16_t mii_reg;
4779 uint16_t spddplx;
97876fc6 4780 unsigned long flags;
1da177e4 4781
96838a40 4782 if (adapter->hw.media_type != e1000_media_type_copper)
1da177e4
LT		 4783 return -EOPNOTSUPP;
4784
4785 switch (cmd) {
4786 case SIOCGMIIPHY:
4787 data->phy_id = adapter->hw.phy_addr;
4788 break;
4789 case SIOCGMIIREG:
96838a40 4790 if (!capable(CAP_NET_ADMIN))
1da177e4 4791 return -EPERM;
97876fc6 4792 spin_lock_irqsave(&adapter->stats_lock, flags);
96838a40 4793 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
97876fc6
MC		 4794 &data->val_out)) {
4795 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4 4796 return -EIO;
97876fc6
MC		 4797 }
4798 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4
LT		 4799 break;
4800 case SIOCSMIIREG:
96838a40 4801 if (!capable(CAP_NET_ADMIN))
1da177e4 4802 return -EPERM;
96838a40 4803 if (data->reg_num & ~(0x1F))
1da177e4
LT		 4804 return -EFAULT;
4805 mii_reg = data->val_in;
97876fc6 4806 spin_lock_irqsave(&adapter->stats_lock, flags);
96838a40 4807 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
97876fc6
MC		 4808 mii_reg)) {
4809 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4 4810 return -EIO;
97876fc6 4811 }
dc86d32a 4812 if (adapter->hw.media_type == e1000_media_type_copper) {
1da177e4
LT		 4813 switch (data->reg_num) {
4814 case PHY_CTRL:
96838a40 4815 if (mii_reg & MII_CR_POWER_DOWN)
1da177e4 4816 break;
96838a40 4817 if (mii_reg & MII_CR_AUTO_NEG_EN) {
1da177e4
LT		 4818 adapter->hw.autoneg = 1;
4819 adapter->hw.autoneg_advertised = 0x2F;
4820 } else {
4821 if (mii_reg & 0x40)
4822 spddplx = SPEED_1000;
4823 else if (mii_reg & 0x2000)
4824 spddplx = SPEED_100;
4825 else
4826 spddplx = SPEED_10;
4827 spddplx += (mii_reg & 0x100)
cb764326
JK		 4828 ? DUPLEX_FULL :
4829 DUPLEX_HALF;
1da177e4
LT		 4830 retval = e1000_set_spd_dplx(adapter,
4831 spddplx);
96838a40 4832 if (retval) {
97876fc6 4833 spin_unlock_irqrestore(
96838a40 4834 &adapter->stats_lock,
97876fc6 4835 flags);
1da177e4 4836 return retval;
97876fc6 4837 }
1da177e4 4838 }
2db10a08
AK		 4839 if (netif_running(adapter->netdev))
4840 e1000_reinit_locked(adapter);
4841 else
1da177e4
LT		 4842 e1000_reset(adapter);
4843 break;
4844 case M88E1000_PHY_SPEC_CTRL:
4845 case M88E1000_EXT_PHY_SPEC_CTRL:
96838a40 4846 if (e1000_phy_reset(&adapter->hw)) {
97876fc6
MC		 4847 spin_unlock_irqrestore(
4848 &adapter->stats_lock, flags);
1da177e4 4849 return -EIO;
97876fc6 4850 }
1da177e4
LT		 4851 break;
4852 }
4853 } else {
4854 switch (data->reg_num) {
4855 case PHY_CTRL:
96838a40 4856 if (mii_reg & MII_CR_POWER_DOWN)
1da177e4 4857 break;
2db10a08
AK		 4858 if (netif_running(adapter->netdev))
4859 e1000_reinit_locked(adapter);
4860 else
1da177e4
LT		 4861 e1000_reset(adapter);
4862 break;
4863 }
4864 }
97876fc6 4865 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4
LT		 4866 break;
4867 default:
4868 return -EOPNOTSUPP;
4869 }
4870 return E1000_SUCCESS;
4871}
4872
4873void
4874e1000_pci_set_mwi(struct e1000_hw *hw)
4875{
4876 struct e1000_adapter *adapter = hw->back;
2648345f 4877 int ret_val = pci_set_mwi(adapter->pdev);
1da177e4 4878
96838a40 4879 if (ret_val)
2648345f 4880 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
1da177e4
LT		 4881}
4882
4883void
4884e1000_pci_clear_mwi(struct e1000_hw *hw)
4885{
4886 struct e1000_adapter *adapter = hw->back;
4887
4888 pci_clear_mwi(adapter->pdev);
4889}
4890
4891void
4892e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4893{
4894 struct e1000_adapter *adapter = hw->back;
4895
4896 pci_read_config_word(adapter->pdev, reg, value);
4897}
4898
4899void
4900e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4901{
4902 struct e1000_adapter *adapter = hw->back;
4903
4904 pci_write_config_word(adapter->pdev, reg, *value);
4905}
4906
caeccb68
JK		 4907int32_t
4908e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4909{
4910 struct e1000_adapter *adapter = hw->back;
4911 uint16_t cap_offset;
4912
4913 cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4914 if (!cap_offset)
4915 return -E1000_ERR_CONFIG;
4916
4917 pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4918
4919 return E1000_SUCCESS;
4920}
4921
1da177e4
LT		 4922void
4923e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4924{
4925 outl(value, port);
4926}
4927
4928static void
4929e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4930{
60490fe0 4931 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 4932 uint32_t ctrl, rctl;
4933
4934 e1000_irq_disable(adapter);
4935 adapter->vlgrp = grp;
4936
96838a40 4937 if (grp) {
1da177e4
LT		 4938 /* enable VLAN tag insert/strip */
4939 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4940 ctrl |= E1000_CTRL_VME;
4941 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4942
cd94dd0b 4943 if (adapter->hw.mac_type != e1000_ich8lan) {
90fb5135
AK		 4944 /* enable VLAN receive filtering */
4945 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4946 rctl |= E1000_RCTL_VFE;
4947 rctl &= ~E1000_RCTL_CFIEN;
4948 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4949 e1000_update_mng_vlan(adapter);
cd94dd0b 4950 }
1da177e4
LT		 4951 } else {
4952 /* disable VLAN tag insert/strip */
4953 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4954 ctrl &= ~E1000_CTRL_VME;
4955 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4956
cd94dd0b 4957 if (adapter->hw.mac_type != e1000_ich8lan) {
90fb5135
AK		 4958 /* disable VLAN filtering */
4959 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4960 rctl &= ~E1000_RCTL_VFE;
4961 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4962 if (adapter->mng_vlan_id !=
4963 (uint16_t)E1000_MNG_VLAN_NONE) {
4964 e1000_vlan_rx_kill_vid(netdev,
4965 adapter->mng_vlan_id);
4966 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4967 }
cd94dd0b 4968 }
1da177e4
LT		 4969 }
4970
4971 e1000_irq_enable(adapter);
4972}
4973
4974static void
4975e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4976{
60490fe0 4977 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 4978 uint32_t vfta, index;
96838a40
JB		 4979
4980 if ((adapter->hw.mng_cookie.status &
4981 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4982 (vid == adapter->mng_vlan_id))
2d7edb92 4983 return;
1da177e4
LT		 4984 /* add VID to filter table */
4985 index = (vid >> 5) & 0x7F;
4986 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4987 vfta |= (1 << (vid & 0x1F));
4988 e1000_write_vfta(&adapter->hw, index, vfta);
4989}
4990
4991static void
4992e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4993{
60490fe0 4994 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 4995 uint32_t vfta, index;
4996
4997 e1000_irq_disable(adapter);
5c15bdec 4998 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4
LT		 4999 e1000_irq_enable(adapter);
5000
96838a40
JB		 5001 if ((adapter->hw.mng_cookie.status &
5002 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
ff147013
JK		 5003 (vid == adapter->mng_vlan_id)) {
5004 /* release control to f/w */
5005 e1000_release_hw_control(adapter);
2d7edb92 5006 return;
ff147013
JK		 5007 }
5008
1da177e4
LT		 5009 /* remove VID from filter table */
5010 index = (vid >> 5) & 0x7F;
5011 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5012 vfta &= ~(1 << (vid & 0x1F));
5013 e1000_write_vfta(&adapter->hw, index, vfta);
5014}
5015
5016static void
5017e1000_restore_vlan(struct e1000_adapter *adapter)
5018{
5019 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5020
96838a40 5021 if (adapter->vlgrp) {
1da177e4 5022 uint16_t vid;
96838a40 5023 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5c15bdec 5024 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 5025 continue;
5026 e1000_vlan_rx_add_vid(adapter->netdev, vid);
5027 }
5028 }
5029}
5030
5031int
5032e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
5033{
5034 adapter->hw.autoneg = 0;
5035
6921368f 5036 /* Fiber NICs only allow 1000 gbps Full duplex */
96838a40 5037 if ((adapter->hw.media_type == e1000_media_type_fiber) &&
6921368f
MC		 5038 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5039 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5040 return -EINVAL;
5041 }
5042
96838a40 5043 switch (spddplx) {
1da177e4
LT		 5044 case SPEED_10 + DUPLEX_HALF:
5045 adapter->hw.forced_speed_duplex = e1000_10_half;
5046 break;
5047 case SPEED_10 + DUPLEX_FULL:
5048 adapter->hw.forced_speed_duplex = e1000_10_full;
5049 break;
5050 case SPEED_100 + DUPLEX_HALF:
5051 adapter->hw.forced_speed_duplex = e1000_100_half;
5052 break;
5053 case SPEED_100 + DUPLEX_FULL:
5054 adapter->hw.forced_speed_duplex = e1000_100_full;
5055 break;
5056 case SPEED_1000 + DUPLEX_FULL:
5057 adapter->hw.autoneg = 1;
5058 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5059 break;
5060 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5061 default:
2648345f 5062 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
1da177e4
LT		 5063 return -EINVAL;
5064 }
5065 return 0;
5066}
5067
1da177e4 5068static int
829ca9a3 5069e1000_suspend(struct pci_dev *pdev, pm_message_t state)
1da177e4
LT		 5070{
5071 struct net_device *netdev = pci_get_drvdata(pdev);
60490fe0 5072 struct e1000_adapter *adapter = netdev_priv(netdev);
0fccd0e9 5073 uint32_t ctrl, ctrl_ext, rctl, status;
1da177e4 5074 uint32_t wufc = adapter->wol;
6fdfef16 5075#ifdef CONFIG_PM
240b1710 5076 int retval = 0;
6fdfef16 5077#endif
1da177e4
LT		 5078
5079 netif_device_detach(netdev);
5080
2db10a08
AK		 5081 if (netif_running(netdev)) {
5082 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1da177e4 5083 e1000_down(adapter);
2db10a08 5084 }
1da177e4 5085
2f82665f 5086#ifdef CONFIG_PM
1d33e9c6 5087 retval = pci_save_state(pdev);
2f82665f
JB		 5088 if (retval)
5089 return retval;
5090#endif
5091
1da177e4 5092 status = E1000_READ_REG(&adapter->hw, STATUS);
96838a40 5093 if (status & E1000_STATUS_LU)
1da177e4
LT		 5094 wufc &= ~E1000_WUFC_LNKC;
5095
96838a40 5096 if (wufc) {
1da177e4
LT		 5097 e1000_setup_rctl(adapter);
5098 e1000_set_multi(netdev);
5099
5100 /* turn on all-multi mode if wake on multicast is enabled */
120cd576 5101 if (wufc & E1000_WUFC_MC) {
1da177e4
LT		 5102 rctl = E1000_READ_REG(&adapter->hw, RCTL);
5103 rctl |= E1000_RCTL_MPE;
5104 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5105 }
5106
96838a40 5107 if (adapter->hw.mac_type >= e1000_82540) {
1da177e4
LT		 5108 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5109 /* advertise wake from D3Cold */
5110 #define E1000_CTRL_ADVD3WUC 0x00100000
5111 /* phy power management enable */
5112 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5113 ctrl |= E1000_CTRL_ADVD3WUC |
5114 E1000_CTRL_EN_PHY_PWR_MGMT;
5115 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5116 }
5117
96838a40 5118 if (adapter->hw.media_type == e1000_media_type_fiber ||
1da177e4
LT		 5119 adapter->hw.media_type == e1000_media_type_internal_serdes) {
5120 /* keep the laser running in D3 */
5121 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
5122 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5123 E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
5124 }
5125
2d7edb92
MC		 5126 /* Allow time for pending master requests to run */
5127 e1000_disable_pciex_master(&adapter->hw);
5128
1da177e4
LT		 5129 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
5130 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
d0e027db
AK		 5131 pci_enable_wake(pdev, PCI_D3hot, 1);
5132 pci_enable_wake(pdev, PCI_D3cold, 1);
1da177e4
LT		 5133 } else {
5134 E1000_WRITE_REG(&adapter->hw, WUC, 0);
5135 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
d0e027db
AK		 5136 pci_enable_wake(pdev, PCI_D3hot, 0);
5137 pci_enable_wake(pdev, PCI_D3cold, 0);
1da177e4
LT		 5138 }
5139
0fccd0e9
JG		 5140 e1000_release_manageability(adapter);
5141
5142 /* make sure adapter isn't asleep if manageability is enabled */
5143 if (adapter->en_mng_pt) {
5144 pci_enable_wake(pdev, PCI_D3hot, 1);
5145 pci_enable_wake(pdev, PCI_D3cold, 1);
1da177e4
LT		 5146 }
5147
cd94dd0b
AK		 5148 if (adapter->hw.phy_type == e1000_phy_igp_3)
5149 e1000_phy_powerdown_workaround(&adapter->hw);
5150
edd106fc
AK		 5151 if (netif_running(netdev))
5152 e1000_free_irq(adapter);
5153
b55ccb35
JK		 5154 /* Release control of h/w to f/w. If f/w is AMT enabled, this
5155 * would have already happened in close and is redundant. */
5156 e1000_release_hw_control(adapter);
2d7edb92 5157
1da177e4 5158 pci_disable_device(pdev);
240b1710 5159
d0e027db 5160 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1da177e4
LT		 5161
5162 return 0;
5163}
5164
2f82665f 5165#ifdef CONFIG_PM
1da177e4
LT		 5166static int
5167e1000_resume(struct pci_dev *pdev)
5168{
5169 struct net_device *netdev = pci_get_drvdata(pdev);
60490fe0 5170 struct e1000_adapter *adapter = netdev_priv(netdev);
0fccd0e9 5171 uint32_t err;
1da177e4 5172
d0e027db 5173 pci_set_power_state(pdev, PCI_D0);
1d33e9c6 5174 pci_restore_state(pdev);
3d1dd8cb
AK		 5175 if ((err = pci_enable_device(pdev))) {
5176 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5177 return err;
5178 }
a4cb847d 5179 pci_set_master(pdev);
1da177e4 5180
d0e027db
AK		 5181 pci_enable_wake(pdev, PCI_D3hot, 0);
5182 pci_enable_wake(pdev, PCI_D3cold, 0);
1da177e4 5183
edd106fc
AK		 5184 if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5185 return err;
5186
5187 e1000_power_up_phy(adapter);
1da177e4
LT		 5188 e1000_reset(adapter);
5189 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5190
0fccd0e9
JG		 5191 e1000_init_manageability(adapter);
5192
96838a40 5193 if (netif_running(netdev))
1da177e4
LT		 5194 e1000_up(adapter);
5195
5196 netif_device_attach(netdev);
5197
b55ccb35
JK		 5198 /* If the controller is 82573 and f/w is AMT, do not set
5199 * DRV_LOAD until the interface is up. For all other cases,
5200 * let the f/w know that the h/w is now under the control
5201 * of the driver. */
5202 if (adapter->hw.mac_type != e1000_82573 ||
5203 !e1000_check_mng_mode(&adapter->hw))
5204 e1000_get_hw_control(adapter);
2d7edb92 5205
1da177e4
LT		 5206 return 0;
5207}
5208#endif
c653e635
AK		 5209
5210static void e1000_shutdown(struct pci_dev *pdev)
5211{
5212 e1000_suspend(pdev, PMSG_SUSPEND);
5213}
5214
1da177e4
LT		 5215#ifdef CONFIG_NET_POLL_CONTROLLER
5216/*
5217 * Polling 'interrupt' - used by things like netconsole to send skbs
5218 * without having to re-enable interrupts. It's not called while
5219 * the interrupt routine is executing.
5220 */
5221static void
2648345f 5222e1000_netpoll(struct net_device *netdev)
1da177e4 5223{
60490fe0 5224 struct e1000_adapter *adapter = netdev_priv(netdev);
d3d9e484 5225
1da177e4 5226 disable_irq(adapter->pdev->irq);
7d12e780 5227 e1000_intr(adapter->pdev->irq, netdev);
c4cfe567 5228 e1000_clean_tx_irq(adapter, adapter->tx_ring);
e8da8be1
JK		 5229#ifndef CONFIG_E1000_NAPI
5230 adapter->clean_rx(adapter, adapter->rx_ring);
5231#endif
1da177e4
LT		 5232 enable_irq(adapter->pdev->irq);
5233}
5234#endif
5235
9026729b
AK		 5236/**
5237 * e1000_io_error_detected - called when PCI error is detected
5238 * @pdev: Pointer to PCI device
5239 * @state: The current pci conneection state
5240 *
5241 * This function is called after a PCI bus error affecting
5242 * this device has been detected.
5243 */
5244static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
5245{
5246 struct net_device *netdev = pci_get_drvdata(pdev);
5247 struct e1000_adapter *adapter = netdev->priv;
5248
5249 netif_device_detach(netdev);
5250
5251 if (netif_running(netdev))
5252 e1000_down(adapter);
72e8d6bb 5253 pci_disable_device(pdev);
9026729b
AK		 5254
5255 /* Request a slot slot reset. */
5256 return PCI_ERS_RESULT_NEED_RESET;
5257}
5258
5259/**
5260 * e1000_io_slot_reset - called after the pci bus has been reset.
5261 * @pdev: Pointer to PCI device
5262 *
5263 * Restart the card from scratch, as if from a cold-boot. Implementation
5264 * resembles the first-half of the e1000_resume routine.
5265 */
5266static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5267{
5268 struct net_device *netdev = pci_get_drvdata(pdev);
5269 struct e1000_adapter *adapter = netdev->priv;
5270
5271 if (pci_enable_device(pdev)) {
5272 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5273 return PCI_ERS_RESULT_DISCONNECT;
5274 }
5275 pci_set_master(pdev);
5276
dbf38c94
LV		 5277 pci_enable_wake(pdev, PCI_D3hot, 0);
5278 pci_enable_wake(pdev, PCI_D3cold, 0);
9026729b 5279
9026729b
AK		 5280 e1000_reset(adapter);
5281 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5282
5283 return PCI_ERS_RESULT_RECOVERED;
5284}
5285
5286/**
5287 * e1000_io_resume - called when traffic can start flowing again.
5288 * @pdev: Pointer to PCI device
5289 *
5290 * This callback is called when the error recovery driver tells us that
5291 * its OK to resume normal operation. Implementation resembles the
5292 * second-half of the e1000_resume routine.
5293 */
5294static void e1000_io_resume(struct pci_dev *pdev)
5295{
5296 struct net_device *netdev = pci_get_drvdata(pdev);
5297 struct e1000_adapter *adapter = netdev->priv;
0fccd0e9
JG		 5298
5299 e1000_init_manageability(adapter);
9026729b
AK		 5300
5301 if (netif_running(netdev)) {
5302 if (e1000_up(adapter)) {
5303 printk("e1000: can't bring device back up after reset\n");
5304 return;
5305 }
5306 }
5307
5308 netif_device_attach(netdev);
5309
0fccd0e9
JG		 5310 /* If the controller is 82573 and f/w is AMT, do not set
5311 * DRV_LOAD until the interface is up. For all other cases,
5312 * let the f/w know that the h/w is now under the control
5313 * of the driver. */
5314 if (adapter->hw.mac_type != e1000_82573 ||
5315 !e1000_check_mng_mode(&adapter->hw))
5316 e1000_get_hw_control(adapter);
9026729b 5317
9026729b
AK		 5318}
5319
1da177e4 5320/* e1000_main.c */
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