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[net-next-2.6.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 <linux.nics@intel.com>
3d41e30a 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
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
JB		 161#ifdef CONFIG_PCI_MSI
162static irqreturn_t e1000_intr_msi(int irq, void *data);
163#endif
581d708e
MC		 164static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
165 struct e1000_tx_ring *tx_ring);
1da177e4 166#ifdef CONFIG_E1000_NAPI
581d708e 167static int e1000_clean(struct net_device *poll_dev, int *budget);
1da177e4 168static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
581d708e 169 struct e1000_rx_ring *rx_ring,
1da177e4 170 int *work_done, int work_to_do);
2d7edb92 171static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
581d708e 172 struct e1000_rx_ring *rx_ring,
2d7edb92 173 int *work_done, int work_to_do);
1da177e4 174#else
581d708e
MC		 175static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
176 struct e1000_rx_ring *rx_ring);
177static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
178 struct e1000_rx_ring *rx_ring);
1da177e4 179#endif
581d708e 180static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
72d64a43
JK		 181 struct e1000_rx_ring *rx_ring,
182 int cleaned_count);
581d708e 183static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
72d64a43
JK		 184 struct e1000_rx_ring *rx_ring,
185 int cleaned_count);
1da177e4
LT		 186static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
187static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
188 int cmd);
35574764 189void e1000_set_ethtool_ops(struct net_device *netdev);
1da177e4
LT		 190static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
191static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
192static void e1000_tx_timeout(struct net_device *dev);
65f27f38 193static void e1000_reset_task(struct work_struct *work);
1da177e4 194static void e1000_smartspeed(struct e1000_adapter *adapter);
e619d523
AK		 195static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
196 struct sk_buff *skb);
1da177e4
LT		 197
198static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
199static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
200static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
201static void e1000_restore_vlan(struct e1000_adapter *adapter);
202
977e74b5 203static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
6fdfef16 204#ifdef CONFIG_PM
1da177e4
LT		 205static int e1000_resume(struct pci_dev *pdev);
206#endif
c653e635 207static void e1000_shutdown(struct pci_dev *pdev);
1da177e4
LT		 208
209#ifdef CONFIG_NET_POLL_CONTROLLER
210/* for netdump / net console */
211static void e1000_netpoll (struct net_device *netdev);
212#endif
213
35574764
NN		 214extern void e1000_check_options(struct e1000_adapter *adapter);
215
1f753861
JB		 216#define COPYBREAK_DEFAULT 256
217static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
218module_param(copybreak, uint, 0644);
219MODULE_PARM_DESC(copybreak,
220 "Maximum size of packet that is copied to a new buffer on receive");
221
9026729b
AK		 222static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
223 pci_channel_state_t state);
224static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
225static void e1000_io_resume(struct pci_dev *pdev);
226
227static struct pci_error_handlers e1000_err_handler = {
228 .error_detected = e1000_io_error_detected,
229 .slot_reset = e1000_io_slot_reset,
230 .resume = e1000_io_resume,
231};
24025e4e 232
1da177e4
LT		 233static struct pci_driver e1000_driver = {
234 .name = e1000_driver_name,
235 .id_table = e1000_pci_tbl,
236 .probe = e1000_probe,
237 .remove = __devexit_p(e1000_remove),
c4e24f01 238#ifdef CONFIG_PM
1da177e4 239 /* Power Managment Hooks */
1da177e4 240 .suspend = e1000_suspend,
c653e635 241 .resume = e1000_resume,
1da177e4 242#endif
9026729b
AK		 243 .shutdown = e1000_shutdown,
244 .err_handler = &e1000_err_handler
1da177e4
LT		 245};
246
247MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
248MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
249MODULE_LICENSE("GPL");
250MODULE_VERSION(DRV_VERSION);
251
252static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
253module_param(debug, int, 0);
254MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
255
256/**
257 * e1000_init_module - Driver Registration Routine
258 *
259 * e1000_init_module is the first routine called when the driver is
260 * loaded. All it does is register with the PCI subsystem.
261 **/
262
263static int __init
264e1000_init_module(void)
265{
266 int ret;
267 printk(KERN_INFO "%s - version %s\n",
268 e1000_driver_string, e1000_driver_version);
269
270 printk(KERN_INFO "%s\n", e1000_copyright);
271
29917620 272 ret = pci_register_driver(&e1000_driver);
1f753861
JB		 273 if (copybreak != COPYBREAK_DEFAULT) {
274 if (copybreak == 0)
275 printk(KERN_INFO "e1000: copybreak disabled\n");
276 else
277 printk(KERN_INFO "e1000: copybreak enabled for "
278 "packets <= %u bytes\n", copybreak);
279 }
1da177e4
LT		 280 return ret;
281}
282
283module_init(e1000_init_module);
284
285/**
286 * e1000_exit_module - Driver Exit Cleanup Routine
287 *
288 * e1000_exit_module is called just before the driver is removed
289 * from memory.
290 **/
291
292static void __exit
293e1000_exit_module(void)
294{
1da177e4
LT		 295 pci_unregister_driver(&e1000_driver);
296}
297
298module_exit(e1000_exit_module);
299
2db10a08
AK		 300static int e1000_request_irq(struct e1000_adapter *adapter)
301{
302 struct net_device *netdev = adapter->netdev;
303 int flags, err = 0;
304
c0bc8721 305 flags = IRQF_SHARED;
2db10a08 306#ifdef CONFIG_PCI_MSI
9ac98284 307 if (adapter->hw.mac_type >= e1000_82571) {
2db10a08
AK		 308 adapter->have_msi = TRUE;
309 if ((err = pci_enable_msi(adapter->pdev))) {
310 DPRINTK(PROBE, ERR,
311 "Unable to allocate MSI interrupt Error: %d\n", err);
312 adapter->have_msi = FALSE;
313 }
314 }
9ac98284 315 if (adapter->have_msi) {
61ef5c00 316 flags &= ~IRQF_SHARED;
9ac98284
JB		 317 err = request_irq(adapter->pdev->irq, &e1000_intr_msi, flags,
318 netdev->name, netdev);
319 if (err)
320 DPRINTK(PROBE, ERR,
321 "Unable to allocate interrupt Error: %d\n", err);
322 } else
2db10a08
AK		 323#endif
324 if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
325 netdev->name, netdev)))
326 DPRINTK(PROBE, ERR,
327 "Unable to allocate interrupt Error: %d\n", err);
328
329 return err;
330}
331
332static void e1000_free_irq(struct e1000_adapter *adapter)
333{
334 struct net_device *netdev = adapter->netdev;
335
336 free_irq(adapter->pdev->irq, netdev);
337
338#ifdef CONFIG_PCI_MSI
339 if (adapter->have_msi)
340 pci_disable_msi(adapter->pdev);
341#endif
342}
343
1da177e4
LT		 344/**
345 * e1000_irq_disable - Mask off interrupt generation on the NIC
346 * @adapter: board private structure
347 **/
348
e619d523 349static void
1da177e4
LT		 350e1000_irq_disable(struct e1000_adapter *adapter)
351{
352 atomic_inc(&adapter->irq_sem);
353 E1000_WRITE_REG(&adapter->hw, IMC, ~0);
354 E1000_WRITE_FLUSH(&adapter->hw);
355 synchronize_irq(adapter->pdev->irq);
356}
357
358/**
359 * e1000_irq_enable - Enable default interrupt generation settings
360 * @adapter: board private structure
361 **/
362
e619d523 363static void
1da177e4
LT		 364e1000_irq_enable(struct e1000_adapter *adapter)
365{
96838a40 366 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
1da177e4
LT		 367 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
368 E1000_WRITE_FLUSH(&adapter->hw);
369 }
370}
3ad2cc67
AB		 371
372static void
2d7edb92
MC		 373e1000_update_mng_vlan(struct e1000_adapter *adapter)
374{
375 struct net_device *netdev = adapter->netdev;
376 uint16_t vid = adapter->hw.mng_cookie.vlan_id;
377 uint16_t old_vid = adapter->mng_vlan_id;
96838a40 378 if (adapter->vlgrp) {
5c15bdec 379 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
96838a40 380 if (adapter->hw.mng_cookie.status &
2d7edb92
MC		 381 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
382 e1000_vlan_rx_add_vid(netdev, vid);
383 adapter->mng_vlan_id = vid;
384 } else
385 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
96838a40
JB		 386
387 if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
388 (vid != old_vid) &&
5c15bdec 389 !vlan_group_get_device(adapter->vlgrp, old_vid))
2d7edb92 390 e1000_vlan_rx_kill_vid(netdev, old_vid);
c5f226fe
JK		 391 } else
392 adapter->mng_vlan_id = vid;
2d7edb92
MC		 393 }
394}
b55ccb35
JK		 395
396/**
397 * e1000_release_hw_control - release control of the h/w to f/w
398 * @adapter: address of board private structure
399 *
400 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
401 * For ASF and Pass Through versions of f/w this means that the
402 * driver is no longer loaded. For AMT version (only with 82573) i
90fb5135 403 * of the f/w this means that the network i/f is closed.
76c224bc 404 *
b55ccb35
JK		 405 **/
406
e619d523 407static void
b55ccb35
JK		 408e1000_release_hw_control(struct e1000_adapter *adapter)
409{
410 uint32_t ctrl_ext;
411 uint32_t swsm;
cd94dd0b 412 uint32_t extcnf;
b55ccb35
JK		 413
414 /* Let firmware taken over control of h/w */
415 switch (adapter->hw.mac_type) {
416 case e1000_82571:
417 case e1000_82572:
4cc15f54 418 case e1000_80003es2lan:
b55ccb35
JK		 419 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
420 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
421 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
422 break;
423 case e1000_82573:
424 swsm = E1000_READ_REG(&adapter->hw, SWSM);
425 E1000_WRITE_REG(&adapter->hw, SWSM,
426 swsm & ~E1000_SWSM_DRV_LOAD);
cd94dd0b
AK		 427 case e1000_ich8lan:
428 extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT);
429 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
430 extcnf & ~E1000_CTRL_EXT_DRV_LOAD);
431 break;
b55ccb35
JK		 432 default:
433 break;
434 }
435}
436
437/**
438 * e1000_get_hw_control - get control of the h/w from f/w
439 * @adapter: address of board private structure
440 *
441 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
76c224bc
AK		 442 * For ASF and Pass Through versions of f/w this means that
443 * the driver is loaded. For AMT version (only with 82573)
90fb5135 444 * of the f/w this means that the network i/f is open.
76c224bc 445 *
b55ccb35
JK		 446 **/
447
e619d523 448static void
b55ccb35
JK		 449e1000_get_hw_control(struct e1000_adapter *adapter)
450{
451 uint32_t ctrl_ext;
452 uint32_t swsm;
cd94dd0b 453 uint32_t extcnf;
90fb5135 454
b55ccb35
JK		 455 /* Let firmware know the driver has taken over */
456 switch (adapter->hw.mac_type) {
457 case e1000_82571:
458 case e1000_82572:
4cc15f54 459 case e1000_80003es2lan:
b55ccb35
JK		 460 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
461 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
462 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
463 break;
464 case e1000_82573:
465 swsm = E1000_READ_REG(&adapter->hw, SWSM);
466 E1000_WRITE_REG(&adapter->hw, SWSM,
467 swsm | E1000_SWSM_DRV_LOAD);
468 break;
cd94dd0b
AK		 469 case e1000_ich8lan:
470 extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);
471 E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,
472 extcnf | E1000_EXTCNF_CTRL_SWFLAG);
473 break;
b55ccb35
JK		 474 default:
475 break;
476 }
477}
478
0fccd0e9
JG		 479static void
480e1000_init_manageability(struct e1000_adapter *adapter)
481{
482 if (adapter->en_mng_pt) {
483 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
484
485 /* disable hardware interception of ARP */
486 manc &= ~(E1000_MANC_ARP_EN);
487
488 /* enable receiving management packets to the host */
489 /* this will probably generate destination unreachable messages
490 * from the host OS, but the packets will be handled on SMBUS */
491 if (adapter->hw.has_manc2h) {
492 uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);
493
494 manc |= E1000_MANC_EN_MNG2HOST;
495#define E1000_MNG2HOST_PORT_623 (1 << 5)
496#define E1000_MNG2HOST_PORT_664 (1 << 6)
497 manc2h |= E1000_MNG2HOST_PORT_623;
498 manc2h |= E1000_MNG2HOST_PORT_664;
499 E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
500 }
501
502 E1000_WRITE_REG(&adapter->hw, MANC, manc);
503 }
504}
505
506static void
507e1000_release_manageability(struct e1000_adapter *adapter)
508{
509 if (adapter->en_mng_pt) {
510 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
511
512 /* re-enable hardware interception of ARP */
513 manc |= E1000_MANC_ARP_EN;
514
515 if (adapter->hw.has_manc2h)
516 manc &= ~E1000_MANC_EN_MNG2HOST;
517
518 /* don't explicitly have to mess with MANC2H since
519 * MANC has an enable disable that gates MANC2H */
520
521 E1000_WRITE_REG(&adapter->hw, MANC, manc);
522 }
523}
524
1da177e4
LT		 525int
526e1000_up(struct e1000_adapter *adapter)
527{
528 struct net_device *netdev = adapter->netdev;
2db10a08 529 int i;
1da177e4
LT		 530
531 /* hardware has been reset, we need to reload some things */
532
1da177e4
LT		 533 e1000_set_multi(netdev);
534
535 e1000_restore_vlan(adapter);
0fccd0e9 536 e1000_init_manageability(adapter);
1da177e4
LT		 537
538 e1000_configure_tx(adapter);
539 e1000_setup_rctl(adapter);
540 e1000_configure_rx(adapter);
72d64a43
JK		 541 /* call E1000_DESC_UNUSED which always leaves
542 * at least 1 descriptor unused to make sure
543 * next_to_use != next_to_clean */
f56799ea 544 for (i = 0; i < adapter->num_rx_queues; i++) {
72d64a43 545 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
a292ca6e
JK		 546 adapter->alloc_rx_buf(adapter, ring,
547 E1000_DESC_UNUSED(ring));
f56799ea 548 }
1da177e4 549
7bfa4816
JK		 550 adapter->tx_queue_len = netdev->tx_queue_len;
551
1da177e4
LT		 552#ifdef CONFIG_E1000_NAPI
553 netif_poll_enable(netdev);
554#endif
5de55624
MC		 555 e1000_irq_enable(adapter);
556
1314bbf3
AK		 557 clear_bit(__E1000_DOWN, &adapter->flags);
558
79f3d399
JB		 559 /* fire a link change interrupt to start the watchdog */
560 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
1da177e4
LT		 561 return 0;
562}
563
79f05bf0
AK		 564/**
565 * e1000_power_up_phy - restore link in case the phy was powered down
566 * @adapter: address of board private structure
567 *
568 * The phy may be powered down to save power and turn off link when the
569 * driver is unloaded and wake on lan is not enabled (among others)
570 * *** this routine MUST be followed by a call to e1000_reset ***
571 *
572 **/
573
d658266e 574void e1000_power_up_phy(struct e1000_adapter *adapter)
79f05bf0
AK		 575{
576 uint16_t mii_reg = 0;
577
578 /* Just clear the power down bit to wake the phy back up */
579 if (adapter->hw.media_type == e1000_media_type_copper) {
580 /* according to the manual, the phy will retain its
581 * settings across a power-down/up cycle */
582 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
583 mii_reg &= ~MII_CR_POWER_DOWN;
584 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
585 }
586}
587
588static void e1000_power_down_phy(struct e1000_adapter *adapter)
589{
61c2505f
BA		 590 /* Power down the PHY so no link is implied when interface is down *
591 * The PHY cannot be powered down if any of the following is TRUE *
79f05bf0
AK		 592 * (a) WoL is enabled
593 * (b) AMT is active
594 * (c) SoL/IDER session is active */
595 if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
61c2505f 596 adapter->hw.media_type == e1000_media_type_copper) {
79f05bf0 597 uint16_t mii_reg = 0;
61c2505f
BA		 598
599 switch (adapter->hw.mac_type) {
600 case e1000_82540:
601 case e1000_82545:
602 case e1000_82545_rev_3:
603 case e1000_82546:
604 case e1000_82546_rev_3:
605 case e1000_82541:
606 case e1000_82541_rev_2:
607 case e1000_82547:
608 case e1000_82547_rev_2:
609 if (E1000_READ_REG(&adapter->hw, MANC) &
610 E1000_MANC_SMBUS_EN)
611 goto out;
612 break;
613 case e1000_82571:
614 case e1000_82572:
615 case e1000_82573:
616 case e1000_80003es2lan:
617 case e1000_ich8lan:
618 if (e1000_check_mng_mode(&adapter->hw) ||
619 e1000_check_phy_reset_block(&adapter->hw))
620 goto out;
621 break;
622 default:
623 goto out;
624 }
79f05bf0
AK		 625 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
626 mii_reg |= MII_CR_POWER_DOWN;
627 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
628 mdelay(1);
629 }
61c2505f
BA		 630out:
631 return;
79f05bf0
AK		 632}
633
1da177e4
LT		 634void
635e1000_down(struct e1000_adapter *adapter)
636{
637 struct net_device *netdev = adapter->netdev;
638
1314bbf3
AK		 639 /* signal that we're down so the interrupt handler does not
640 * reschedule our watchdog timer */
641 set_bit(__E1000_DOWN, &adapter->flags);
642
1da177e4 643 e1000_irq_disable(adapter);
c1605eb3 644
1da177e4
LT		 645 del_timer_sync(&adapter->tx_fifo_stall_timer);
646 del_timer_sync(&adapter->watchdog_timer);
647 del_timer_sync(&adapter->phy_info_timer);
648
649#ifdef CONFIG_E1000_NAPI
650 netif_poll_disable(netdev);
651#endif
7bfa4816 652 netdev->tx_queue_len = adapter->tx_queue_len;
1da177e4
LT		 653 adapter->link_speed = 0;
654 adapter->link_duplex = 0;
655 netif_carrier_off(netdev);
656 netif_stop_queue(netdev);
657
658 e1000_reset(adapter);
581d708e
MC		 659 e1000_clean_all_tx_rings(adapter);
660 e1000_clean_all_rx_rings(adapter);
1da177e4 661}
1da177e4 662
2db10a08
AK		 663void
664e1000_reinit_locked(struct e1000_adapter *adapter)
665{
666 WARN_ON(in_interrupt());
667 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
668 msleep(1);
669 e1000_down(adapter);
670 e1000_up(adapter);
671 clear_bit(__E1000_RESETTING, &adapter->flags);
1da177e4
LT		 672}
673
674void
675e1000_reset(struct e1000_adapter *adapter)
676{
018ea44e 677 uint32_t pba = 0, tx_space, min_tx_space, min_rx_space;
1125ecbc 678 uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
018ea44e 679 boolean_t legacy_pba_adjust = FALSE;
1da177e4
LT		 680
681 /* Repartition Pba for greater than 9k mtu
682 * To take effect CTRL.RST is required.
683 */
684
2d7edb92 685 switch (adapter->hw.mac_type) {
018ea44e
BA		 686 case e1000_82542_rev2_0:
687 case e1000_82542_rev2_1:
688 case e1000_82543:
689 case e1000_82544:
690 case e1000_82540:
691 case e1000_82541:
692 case e1000_82541_rev_2:
693 legacy_pba_adjust = TRUE;
694 pba = E1000_PBA_48K;
695 break;
696 case e1000_82545:
697 case e1000_82545_rev_3:
698 case e1000_82546:
699 case e1000_82546_rev_3:
700 pba = E1000_PBA_48K;
701 break;
2d7edb92 702 case e1000_82547:
0e6ef3e0 703 case e1000_82547_rev_2:
018ea44e 704 legacy_pba_adjust = TRUE;
2d7edb92
MC		 705 pba = E1000_PBA_30K;
706 break;
868d5309
MC		 707 case e1000_82571:
708 case e1000_82572:
6418ecc6 709 case e1000_80003es2lan:
868d5309
MC		 710 pba = E1000_PBA_38K;
711 break;
2d7edb92 712 case e1000_82573:
018ea44e 713 pba = E1000_PBA_20K;
2d7edb92 714 break;
cd94dd0b
AK		 715 case e1000_ich8lan:
716 pba = E1000_PBA_8K;
018ea44e
BA		 717 case e1000_undefined:
718 case e1000_num_macs:
2d7edb92
MC		 719 break;
720 }
721
018ea44e
BA		 722 if (legacy_pba_adjust == TRUE) {
723 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
724 pba -= 8; /* allocate more FIFO for Tx */
2d7edb92 725
018ea44e
BA		 726 if (adapter->hw.mac_type == e1000_82547) {
727 adapter->tx_fifo_head = 0;
728 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
729 adapter->tx_fifo_size =
730 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
731 atomic_set(&adapter->tx_fifo_stall, 0);
732 }
733 } else if (adapter->hw.max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
734 /* adjust PBA for jumbo frames */
735 E1000_WRITE_REG(&adapter->hw, PBA, pba);
736
737 /* To maintain wire speed transmits, the Tx FIFO should be
738 * large enough to accomodate two full transmit packets,
739 * rounded up to the next 1KB and expressed in KB. Likewise,
740 * the Rx FIFO should be large enough to accomodate at least
741 * one full receive packet and is similarly rounded up and
742 * expressed in KB. */
743 pba = E1000_READ_REG(&adapter->hw, PBA);
744 /* upper 16 bits has Tx packet buffer allocation size in KB */
745 tx_space = pba >> 16;
746 /* lower 16 bits has Rx packet buffer allocation size in KB */
747 pba &= 0xffff;
748 /* don't include ethernet FCS because hardware appends/strips */
749 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
750 VLAN_TAG_SIZE;
751 min_tx_space = min_rx_space;
752 min_tx_space *= 2;
753 E1000_ROUNDUP(min_tx_space, 1024);
754 min_tx_space >>= 10;
755 E1000_ROUNDUP(min_rx_space, 1024);
756 min_rx_space >>= 10;
757
758 /* If current Tx allocation is less than the min Tx FIFO size,
759 * and the min Tx FIFO size is less than the current Rx FIFO
760 * allocation, take space away from current Rx allocation */
761 if (tx_space < min_tx_space &&
762 ((min_tx_space - tx_space) < pba)) {
763 pba = pba - (min_tx_space - tx_space);
764
765 /* PCI/PCIx hardware has PBA alignment constraints */
766 switch (adapter->hw.mac_type) {
767 case e1000_82545 ... e1000_82546_rev_3:
768 pba &= ~(E1000_PBA_8K - 1);
769 break;
770 default:
771 break;
772 }
773
774 /* if short on rx space, rx wins and must trump tx
775 * adjustment or use Early Receive if available */
776 if (pba < min_rx_space) {
777 switch (adapter->hw.mac_type) {
778 case e1000_82573:
779 /* ERT enabled in e1000_configure_rx */
780 break;
781 default:
782 pba = min_rx_space;
783 break;
784 }
785 }
786 }
1da177e4 787 }
2d7edb92 788
1da177e4
LT		 789 E1000_WRITE_REG(&adapter->hw, PBA, pba);
790
791 /* flow control settings */
f11b7f85
JK		 792 /* Set the FC high water mark to 90% of the FIFO size.
793 * Required to clear last 3 LSB */
794 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
cd94dd0b
AK		 795 /* We can't use 90% on small FIFOs because the remainder
796 * would be less than 1 full frame. In this case, we size
797 * it to allow at least a full frame above the high water
798 * mark. */
799 if (pba < E1000_PBA_16K)
800 fc_high_water_mark = (pba * 1024) - 1600;
f11b7f85
JK		 801
802 adapter->hw.fc_high_water = fc_high_water_mark;
803 adapter->hw.fc_low_water = fc_high_water_mark - 8;
87041639
JK		 804 if (adapter->hw.mac_type == e1000_80003es2lan)
805 adapter->hw.fc_pause_time = 0xFFFF;
806 else
807 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
1da177e4
LT		 808 adapter->hw.fc_send_xon = 1;
809 adapter->hw.fc = adapter->hw.original_fc;
810
2d7edb92 811 /* Allow time for pending master requests to run */
1da177e4 812 e1000_reset_hw(&adapter->hw);
96838a40 813 if (adapter->hw.mac_type >= e1000_82544)
1da177e4 814 E1000_WRITE_REG(&adapter->hw, WUC, 0);
09ae3e88 815
96838a40 816 if (e1000_init_hw(&adapter->hw))
1da177e4 817 DPRINTK(PROBE, ERR, "Hardware Error\n");
2d7edb92 818 e1000_update_mng_vlan(adapter);
3d5460a0
JB		 819
820 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
821 if (adapter->hw.mac_type >= e1000_82544 &&
822 adapter->hw.mac_type <= e1000_82547_rev_2 &&
823 adapter->hw.autoneg == 1 &&
824 adapter->hw.autoneg_advertised == ADVERTISE_1000_FULL) {
825 uint32_t ctrl = E1000_READ_REG(&adapter->hw, CTRL);
826 /* clear phy power management bit if we are in gig only mode,
827 * which if enabled will attempt negotiation to 100Mb, which
828 * can cause a loss of link at power off or driver unload */
829 ctrl &= ~E1000_CTRL_SWDPIN3;
830 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
831 }
832
1da177e4
LT		 833 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
834 E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
835
836 e1000_reset_adaptive(&adapter->hw);
837 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
9a53a202
AK		 838
839 if (!adapter->smart_power_down &&
840 (adapter->hw.mac_type == e1000_82571 ||
841 adapter->hw.mac_type == e1000_82572)) {
842 uint16_t phy_data = 0;
843 /* speed up time to link by disabling smart power down, ignore
844 * the return value of this function because there is nothing
845 * different we would do if it failed */
846 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
847 &phy_data);
848 phy_data &= ~IGP02E1000_PM_SPD;
849 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
850 phy_data);
851 }
852
0fccd0e9 853 e1000_release_manageability(adapter);
1da177e4
LT		 854}
855
856/**
857 * e1000_probe - Device Initialization Routine
858 * @pdev: PCI device information struct
859 * @ent: entry in e1000_pci_tbl
860 *
861 * Returns 0 on success, negative on failure
862 *
863 * e1000_probe initializes an adapter identified by a pci_dev structure.
864 * The OS initialization, configuring of the adapter private structure,
865 * and a hardware reset occur.
866 **/
867
868static int __devinit
869e1000_probe(struct pci_dev *pdev,
870 const struct pci_device_id *ent)
871{
872 struct net_device *netdev;
873 struct e1000_adapter *adapter;
2d7edb92 874 unsigned long mmio_start, mmio_len;
cd94dd0b 875 unsigned long flash_start, flash_len;
2d7edb92 876
1da177e4 877 static int cards_found = 0;
120cd576 878 static int global_quad_port_a = 0; /* global ksp3 port a indication */
2d7edb92 879 int i, err, pci_using_dac;
120cd576 880 uint16_t eeprom_data = 0;
1da177e4 881 uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
96838a40 882 if ((err = pci_enable_device(pdev)))
1da177e4
LT		 883 return err;
884
cd94dd0b
AK		 885 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
886 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
1da177e4
LT		 887 pci_using_dac = 1;
888 } else {
cd94dd0b
AK		 889 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
890 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
1da177e4 891 E1000_ERR("No usable DMA configuration, aborting\n");
6dd62ab0 892 goto err_dma;
1da177e4
LT		 893 }
894 pci_using_dac = 0;
895 }
896
96838a40 897 if ((err = pci_request_regions(pdev, e1000_driver_name)))
6dd62ab0 898 goto err_pci_reg;
1da177e4
LT		 899
900 pci_set_master(pdev);
901
6dd62ab0 902 err = -ENOMEM;
1da177e4 903 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
6dd62ab0 904 if (!netdev)
1da177e4 905 goto err_alloc_etherdev;
1da177e4
LT		 906
907 SET_MODULE_OWNER(netdev);
908 SET_NETDEV_DEV(netdev, &pdev->dev);
909
910 pci_set_drvdata(pdev, netdev);
60490fe0 911 adapter = netdev_priv(netdev);
1da177e4
LT		 912 adapter->netdev = netdev;
913 adapter->pdev = pdev;
914 adapter->hw.back = adapter;
915 adapter->msg_enable = (1 << debug) - 1;
916
917 mmio_start = pci_resource_start(pdev, BAR_0);
918 mmio_len = pci_resource_len(pdev, BAR_0);
919
6dd62ab0 920 err = -EIO;
1da177e4 921 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
6dd62ab0 922 if (!adapter->hw.hw_addr)
1da177e4 923 goto err_ioremap;
1da177e4 924
96838a40
JB		 925 for (i = BAR_1; i <= BAR_5; i++) {
926 if (pci_resource_len(pdev, i) == 0)
1da177e4 927 continue;
96838a40 928 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1da177e4
LT		 929 adapter->hw.io_base = pci_resource_start(pdev, i);
930 break;
931 }
932 }
933
934 netdev->open = &e1000_open;
935 netdev->stop = &e1000_close;
936 netdev->hard_start_xmit = &e1000_xmit_frame;
937 netdev->get_stats = &e1000_get_stats;
938 netdev->set_multicast_list = &e1000_set_multi;
939 netdev->set_mac_address = &e1000_set_mac;
940 netdev->change_mtu = &e1000_change_mtu;
941 netdev->do_ioctl = &e1000_ioctl;
942 e1000_set_ethtool_ops(netdev);
943 netdev->tx_timeout = &e1000_tx_timeout;
944 netdev->watchdog_timeo = 5 * HZ;
945#ifdef CONFIG_E1000_NAPI
946 netdev->poll = &e1000_clean;
947 netdev->weight = 64;
948#endif
949 netdev->vlan_rx_register = e1000_vlan_rx_register;
950 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
951 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
952#ifdef CONFIG_NET_POLL_CONTROLLER
953 netdev->poll_controller = e1000_netpoll;
954#endif
0eb5a34c 955 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1da177e4
LT		 956
957 netdev->mem_start = mmio_start;
958 netdev->mem_end = mmio_start + mmio_len;
959 netdev->base_addr = adapter->hw.io_base;
960
961 adapter->bd_number = cards_found;
962
963 /* setup the private structure */
964
96838a40 965 if ((err = e1000_sw_init(adapter)))
1da177e4
LT		 966 goto err_sw_init;
967
6dd62ab0 968 err = -EIO;
cd94dd0b
AK		 969 /* Flash BAR mapping must happen after e1000_sw_init
970 * because it depends on mac_type */
971 if ((adapter->hw.mac_type == e1000_ich8lan) &&
972 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
973 flash_start = pci_resource_start(pdev, 1);
974 flash_len = pci_resource_len(pdev, 1);
975 adapter->hw.flash_address = ioremap(flash_start, flash_len);
6dd62ab0 976 if (!adapter->hw.flash_address)
cd94dd0b 977 goto err_flashmap;
cd94dd0b
AK		 978 }
979
6dd62ab0 980 if (e1000_check_phy_reset_block(&adapter->hw))
2d7edb92
MC		 981 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
982
96838a40 983 if (adapter->hw.mac_type >= e1000_82543) {
1da177e4
LT		 984 netdev->features = NETIF_F_SG |
985 NETIF_F_HW_CSUM |
986 NETIF_F_HW_VLAN_TX |
987 NETIF_F_HW_VLAN_RX |
988 NETIF_F_HW_VLAN_FILTER;
cd94dd0b
AK		 989 if (adapter->hw.mac_type == e1000_ich8lan)
990 netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1da177e4
LT		 991 }
992
96838a40 993 if ((adapter->hw.mac_type >= e1000_82544) &&
1da177e4
LT		 994 (adapter->hw.mac_type != e1000_82547))
995 netdev->features |= NETIF_F_TSO;
2d7edb92 996
96838a40 997 if (adapter->hw.mac_type > e1000_82547_rev_2)
87ca4e5b 998 netdev->features |= NETIF_F_TSO6;
96838a40 999 if (pci_using_dac)
1da177e4
LT		 1000 netdev->features |= NETIF_F_HIGHDMA;
1001
76c224bc
AK		 1002 netdev->features |= NETIF_F_LLTX;
1003
2d7edb92
MC		 1004 adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
1005
cd94dd0b
AK		 1006 /* initialize eeprom parameters */
1007
1008 if (e1000_init_eeprom_params(&adapter->hw)) {
1009 E1000_ERR("EEPROM initialization failed\n");
6dd62ab0 1010 goto err_eeprom;
cd94dd0b
AK		 1011 }
1012
96838a40 1013 /* before reading the EEPROM, reset the controller to
1da177e4 1014 * put the device in a known good starting state */
96838a40 1015
1da177e4
LT		 1016 e1000_reset_hw(&adapter->hw);
1017
1018 /* make sure the EEPROM is good */
1019
96838a40 1020 if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
1da177e4 1021 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1da177e4
LT		 1022 goto err_eeprom;
1023 }
1024
1025 /* copy the MAC address out of the EEPROM */
1026
96838a40 1027 if (e1000_read_mac_addr(&adapter->hw))
1da177e4
LT		 1028 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1029 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
9beb0ac1 1030 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
1da177e4 1031
96838a40 1032 if (!is_valid_ether_addr(netdev->perm_addr)) {
1da177e4 1033 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1da177e4
LT		 1034 goto err_eeprom;
1035 }
1036
1da177e4
LT		 1037 e1000_get_bus_info(&adapter->hw);
1038
1039 init_timer(&adapter->tx_fifo_stall_timer);
1040 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1041 adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
1042
1043 init_timer(&adapter->watchdog_timer);
1044 adapter->watchdog_timer.function = &e1000_watchdog;
1045 adapter->watchdog_timer.data = (unsigned long) adapter;
1046
1da177e4
LT		 1047 init_timer(&adapter->phy_info_timer);
1048 adapter->phy_info_timer.function = &e1000_update_phy_info;
1049 adapter->phy_info_timer.data = (unsigned long) adapter;
1050
65f27f38 1051 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1da177e4 1052
1da177e4
LT		 1053 e1000_check_options(adapter);
1054
1055 /* Initial Wake on LAN setting
1056 * If APM wake is enabled in the EEPROM,
1057 * enable the ACPI Magic Packet filter
1058 */
1059
96838a40 1060 switch (adapter->hw.mac_type) {
1da177e4
LT		 1061 case e1000_82542_rev2_0:
1062 case e1000_82542_rev2_1:
1063 case e1000_82543:
1064 break;
1065 case e1000_82544:
1066 e1000_read_eeprom(&adapter->hw,
1067 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1068 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1069 break;
cd94dd0b
AK		 1070 case e1000_ich8lan:
1071 e1000_read_eeprom(&adapter->hw,
1072 EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1073 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1074 break;
1da177e4
LT		 1075 case e1000_82546:
1076 case e1000_82546_rev_3:
fd803241 1077 case e1000_82571:
6418ecc6 1078 case e1000_80003es2lan:
96838a40 1079 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1da177e4
LT		 1080 e1000_read_eeprom(&adapter->hw,
1081 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1082 break;
1083 }
1084 /* Fall Through */
1085 default:
1086 e1000_read_eeprom(&adapter->hw,
1087 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1088 break;
1089 }
96838a40 1090 if (eeprom_data & eeprom_apme_mask)
120cd576
JB		 1091 adapter->eeprom_wol |= E1000_WUFC_MAG;
1092
1093 /* now that we have the eeprom settings, apply the special cases
1094 * where the eeprom may be wrong or the board simply won't support
1095 * wake on lan on a particular port */
1096 switch (pdev->device) {
1097 case E1000_DEV_ID_82546GB_PCIE:
1098 adapter->eeprom_wol = 0;
1099 break;
1100 case E1000_DEV_ID_82546EB_FIBER:
1101 case E1000_DEV_ID_82546GB_FIBER:
1102 case E1000_DEV_ID_82571EB_FIBER:
1103 /* Wake events only supported on port A for dual fiber
1104 * regardless of eeprom setting */
1105 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
1106 adapter->eeprom_wol = 0;
1107 break;
1108 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
5881cde8 1109 case E1000_DEV_ID_82571EB_QUAD_COPPER:
fc2307d0 1110 case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
120cd576
JB		 1111 /* if quad port adapter, disable WoL on all but port A */
1112 if (global_quad_port_a != 0)
1113 adapter->eeprom_wol = 0;
1114 else
1115 adapter->quad_port_a = 1;
1116 /* Reset for multiple quad port adapters */
1117 if (++global_quad_port_a == 4)
1118 global_quad_port_a = 0;
1119 break;
1120 }
1121
1122 /* initialize the wol settings based on the eeprom settings */
1123 adapter->wol = adapter->eeprom_wol;
1da177e4 1124
fb3d47d4
JK		 1125 /* print bus type/speed/width info */
1126 {
1127 struct e1000_hw *hw = &adapter->hw;
1128 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1129 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1130 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1131 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1132 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1133 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1134 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1135 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1136 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1137 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1138 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1139 "32-bit"));
1140 }
1141
1142 for (i = 0; i < 6; i++)
1143 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
1144
1da177e4
LT		 1145 /* reset the hardware with the new settings */
1146 e1000_reset(adapter);
1147
b55ccb35
JK		 1148 /* If the controller is 82573 and f/w is AMT, do not set
1149 * DRV_LOAD until the interface is up. For all other cases,
1150 * let the f/w know that the h/w is now under the control
1151 * of the driver. */
1152 if (adapter->hw.mac_type != e1000_82573 ||
1153 !e1000_check_mng_mode(&adapter->hw))
1154 e1000_get_hw_control(adapter);
2d7edb92 1155
1da177e4 1156 strcpy(netdev->name, "eth%d");
96838a40 1157 if ((err = register_netdev(netdev)))
1da177e4
LT		 1158 goto err_register;
1159
1314bbf3
AK		 1160 /* tell the stack to leave us alone until e1000_open() is called */
1161 netif_carrier_off(netdev);
1162 netif_stop_queue(netdev);
1163
1da177e4
LT		 1164 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1165
1166 cards_found++;
1167 return 0;
1168
1169err_register:
6dd62ab0
VA		 1170 e1000_release_hw_control(adapter);
1171err_eeprom:
1172 if (!e1000_check_phy_reset_block(&adapter->hw))
1173 e1000_phy_hw_reset(&adapter->hw);
1174
cd94dd0b
AK		 1175 if (adapter->hw.flash_address)
1176 iounmap(adapter->hw.flash_address);
1177err_flashmap:
6dd62ab0
VA		 1178#ifdef CONFIG_E1000_NAPI
1179 for (i = 0; i < adapter->num_rx_queues; i++)
1180 dev_put(&adapter->polling_netdev[i]);
1181#endif
1182
1183 kfree(adapter->tx_ring);
1184 kfree(adapter->rx_ring);
1185#ifdef CONFIG_E1000_NAPI
1186 kfree(adapter->polling_netdev);
1187#endif
1da177e4 1188err_sw_init:
1da177e4
LT		 1189 iounmap(adapter->hw.hw_addr);
1190err_ioremap:
1191 free_netdev(netdev);
1192err_alloc_etherdev:
1193 pci_release_regions(pdev);
6dd62ab0
VA		 1194err_pci_reg:
1195err_dma:
1196 pci_disable_device(pdev);
1da177e4
LT		 1197 return err;
1198}
1199
1200/**
1201 * e1000_remove - Device Removal Routine
1202 * @pdev: PCI device information struct
1203 *
1204 * e1000_remove is called by the PCI subsystem to alert the driver
1205 * that it should release a PCI device. The could be caused by a
1206 * Hot-Plug event, or because the driver is going to be removed from
1207 * memory.
1208 **/
1209
1210static void __devexit
1211e1000_remove(struct pci_dev *pdev)
1212{
1213 struct net_device *netdev = pci_get_drvdata(pdev);
60490fe0 1214 struct e1000_adapter *adapter = netdev_priv(netdev);
581d708e
MC		 1215#ifdef CONFIG_E1000_NAPI
1216 int i;
1217#endif
1da177e4 1218
be2b28ed
JG		 1219 flush_scheduled_work();
1220
0fccd0e9 1221 e1000_release_manageability(adapter);
1da177e4 1222
b55ccb35
JK		 1223 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1224 * would have already happened in close and is redundant. */
1225 e1000_release_hw_control(adapter);
2d7edb92 1226
1da177e4 1227 unregister_netdev(netdev);
581d708e 1228#ifdef CONFIG_E1000_NAPI
f56799ea 1229 for (i = 0; i < adapter->num_rx_queues; i++)
15333061 1230 dev_put(&adapter->polling_netdev[i]);
581d708e 1231#endif
1da177e4 1232
96838a40 1233 if (!e1000_check_phy_reset_block(&adapter->hw))
2d7edb92 1234 e1000_phy_hw_reset(&adapter->hw);
1da177e4 1235
24025e4e
MC		 1236 kfree(adapter->tx_ring);
1237 kfree(adapter->rx_ring);
1238#ifdef CONFIG_E1000_NAPI
1239 kfree(adapter->polling_netdev);
1240#endif
1241
1da177e4 1242 iounmap(adapter->hw.hw_addr);
cd94dd0b
AK		 1243 if (adapter->hw.flash_address)
1244 iounmap(adapter->hw.flash_address);
1da177e4
LT		 1245 pci_release_regions(pdev);
1246
1247 free_netdev(netdev);
1248
1249 pci_disable_device(pdev);
1250}
1251
1252/**
1253 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1254 * @adapter: board private structure to initialize
1255 *
1256 * e1000_sw_init initializes the Adapter private data structure.
1257 * Fields are initialized based on PCI device information and
1258 * OS network device settings (MTU size).
1259 **/
1260
1261static int __devinit
1262e1000_sw_init(struct e1000_adapter *adapter)
1263{
1264 struct e1000_hw *hw = &adapter->hw;
1265 struct net_device *netdev = adapter->netdev;
1266 struct pci_dev *pdev = adapter->pdev;
581d708e
MC		 1267#ifdef CONFIG_E1000_NAPI
1268 int i;
1269#endif
1da177e4
LT		 1270
1271 /* PCI config space info */
1272
1273 hw->vendor_id = pdev->vendor;
1274 hw->device_id = pdev->device;
1275 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1276 hw->subsystem_id = pdev->subsystem_device;
1277
1278 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1279
1280 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1281
eb0f8054 1282 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
9e2feace 1283 adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1da177e4
LT		 1284 hw->max_frame_size = netdev->mtu +
1285 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1286 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1287
1288 /* identify the MAC */
1289
96838a40 1290 if (e1000_set_mac_type(hw)) {
1da177e4
LT		 1291 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1292 return -EIO;
1293 }
1294
96838a40 1295 switch (hw->mac_type) {
1da177e4
LT		 1296 default:
1297 break;
1298 case e1000_82541:
1299 case e1000_82547:
1300 case e1000_82541_rev_2:
1301 case e1000_82547_rev_2:
1302 hw->phy_init_script = 1;
1303 break;
1304 }
1305
1306 e1000_set_media_type(hw);
1307
1308 hw->wait_autoneg_complete = FALSE;
1309 hw->tbi_compatibility_en = TRUE;
1310 hw->adaptive_ifs = TRUE;
1311
1312 /* Copper options */
1313
96838a40 1314 if (hw->media_type == e1000_media_type_copper) {
1da177e4
LT		 1315 hw->mdix = AUTO_ALL_MODES;
1316 hw->disable_polarity_correction = FALSE;
1317 hw->master_slave = E1000_MASTER_SLAVE;
1318 }
1319
f56799ea
JK		 1320 adapter->num_tx_queues = 1;
1321 adapter->num_rx_queues = 1;
581d708e
MC		 1322
1323 if (e1000_alloc_queues(adapter)) {
1324 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1325 return -ENOMEM;
1326 }
1327
1328#ifdef CONFIG_E1000_NAPI
f56799ea 1329 for (i = 0; i < adapter->num_rx_queues; i++) {
581d708e
MC		 1330 adapter->polling_netdev[i].priv = adapter;
1331 adapter->polling_netdev[i].poll = &e1000_clean;
1332 adapter->polling_netdev[i].weight = 64;
1333 dev_hold(&adapter->polling_netdev[i]);
1334 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1335 }
7bfa4816 1336 spin_lock_init(&adapter->tx_queue_lock);
24025e4e
MC		 1337#endif
1338
1da177e4
LT		 1339 atomic_set(&adapter->irq_sem, 1);
1340 spin_lock_init(&adapter->stats_lock);
1da177e4 1341
1314bbf3
AK		 1342 set_bit(__E1000_DOWN, &adapter->flags);
1343
1da177e4
LT		 1344 return 0;
1345}
1346
581d708e
MC		 1347/**
1348 * e1000_alloc_queues - Allocate memory for all rings
1349 * @adapter: board private structure to initialize
1350 *
1351 * We allocate one ring per queue at run-time since we don't know the
1352 * number of queues at compile-time. The polling_netdev array is
1353 * intended for Multiqueue, but should work fine with a single queue.
1354 **/
1355
1356static int __devinit
1357e1000_alloc_queues(struct e1000_adapter *adapter)
1358{
1359 int size;
1360
f56799ea 1361 size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
581d708e
MC		 1362 adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1363 if (!adapter->tx_ring)
1364 return -ENOMEM;
1365 memset(adapter->tx_ring, 0, size);
1366
f56799ea 1367 size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
581d708e
MC		 1368 adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1369 if (!adapter->rx_ring) {
1370 kfree(adapter->tx_ring);
1371 return -ENOMEM;
1372 }
1373 memset(adapter->rx_ring, 0, size);
1374
1375#ifdef CONFIG_E1000_NAPI
f56799ea 1376 size = sizeof(struct net_device) * adapter->num_rx_queues;
581d708e
MC		 1377 adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1378 if (!adapter->polling_netdev) {
1379 kfree(adapter->tx_ring);
1380 kfree(adapter->rx_ring);
1381 return -ENOMEM;
1382 }
1383 memset(adapter->polling_netdev, 0, size);
1384#endif
1385
1386 return E1000_SUCCESS;
1387}
1388
1da177e4
LT		 1389/**
1390 * e1000_open - Called when a network interface is made active
1391 * @netdev: network interface device structure
1392 *
1393 * Returns 0 on success, negative value on failure
1394 *
1395 * The open entry point is called when a network interface is made
1396 * active by the system (IFF_UP). At this point all resources needed
1397 * for transmit and receive operations are allocated, the interrupt
1398 * handler is registered with the OS, the watchdog timer is started,
1399 * and the stack is notified that the interface is ready.
1400 **/
1401
1402static int
1403e1000_open(struct net_device *netdev)
1404{
60490fe0 1405 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 1406 int err;
1407
2db10a08 1408 /* disallow open during test */
1314bbf3 1409 if (test_bit(__E1000_TESTING, &adapter->flags))
2db10a08
AK		 1410 return -EBUSY;
1411
1da177e4 1412 /* allocate transmit descriptors */
581d708e 1413 if ((err = e1000_setup_all_tx_resources(adapter)))
1da177e4
LT		 1414 goto err_setup_tx;
1415
1416 /* allocate receive descriptors */
581d708e 1417 if ((err = e1000_setup_all_rx_resources(adapter)))
1da177e4
LT		 1418 goto err_setup_rx;
1419
b5bf28cd
LT		 1420 err = e1000_request_irq(adapter);
1421 if (err)
1422 goto err_req_irq;
1423
79f05bf0
AK		 1424 e1000_power_up_phy(adapter);
1425
96838a40 1426 if ((err = e1000_up(adapter)))
1da177e4 1427 goto err_up;
2d7edb92 1428 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
96838a40 1429 if ((adapter->hw.mng_cookie.status &
2d7edb92
MC		 1430 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1431 e1000_update_mng_vlan(adapter);
1432 }
1da177e4 1433
b55ccb35
JK		 1434 /* If AMT is enabled, let the firmware know that the network
1435 * interface is now open */
1436 if (adapter->hw.mac_type == e1000_82573 &&
1437 e1000_check_mng_mode(&adapter->hw))
1438 e1000_get_hw_control(adapter);
1439
1da177e4
LT		 1440 return E1000_SUCCESS;
1441
1442err_up:
401a552b 1443 e1000_power_down_phy(adapter);
b5bf28cd
LT		 1444 e1000_free_irq(adapter);
1445err_req_irq:
581d708e 1446 e1000_free_all_rx_resources(adapter);
1da177e4 1447err_setup_rx:
581d708e 1448 e1000_free_all_tx_resources(adapter);
1da177e4
LT		 1449err_setup_tx:
1450 e1000_reset(adapter);
1451
1452 return err;
1453}
1454
1455/**
1456 * e1000_close - Disables a network interface
1457 * @netdev: network interface device structure
1458 *
1459 * Returns 0, this is not allowed to fail
1460 *
1461 * The close entry point is called when an interface is de-activated
1462 * by the OS. The hardware is still under the drivers control, but
1463 * needs to be disabled. A global MAC reset is issued to stop the
1464 * hardware, and all transmit and receive resources are freed.
1465 **/
1466
1467static int
1468e1000_close(struct net_device *netdev)
1469{
60490fe0 1470 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 1471
2db10a08 1472 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1da177e4 1473 e1000_down(adapter);
79f05bf0 1474 e1000_power_down_phy(adapter);
2db10a08 1475 e1000_free_irq(adapter);
1da177e4 1476
581d708e
MC		 1477 e1000_free_all_tx_resources(adapter);
1478 e1000_free_all_rx_resources(adapter);
1da177e4 1479
4666560a
BA		 1480 /* kill manageability vlan ID if supported, but not if a vlan with
1481 * the same ID is registered on the host OS (let 8021q kill it) */
96838a40 1482 if ((adapter->hw.mng_cookie.status &
4666560a
BA		 1483 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1484 !(adapter->vlgrp &&
5c15bdec 1485 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
2d7edb92
MC		 1486 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1487 }
b55ccb35
JK		 1488
1489 /* If AMT is enabled, let the firmware know that the network
1490 * interface is now closed */
1491 if (adapter->hw.mac_type == e1000_82573 &&
1492 e1000_check_mng_mode(&adapter->hw))
1493 e1000_release_hw_control(adapter);
1494
1da177e4
LT		 1495 return 0;
1496}
1497
1498/**
1499 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1500 * @adapter: address of board private structure
2d7edb92
MC		 1501 * @start: address of beginning of memory
1502 * @len: length of memory
1da177e4 1503 **/
e619d523 1504static boolean_t
1da177e4
LT		 1505e1000_check_64k_bound(struct e1000_adapter *adapter,
1506 void *start, unsigned long len)
1507{
1508 unsigned long begin = (unsigned long) start;
1509 unsigned long end = begin + len;
1510
2648345f
MC		 1511 /* First rev 82545 and 82546 need to not allow any memory
1512 * write location to cross 64k boundary due to errata 23 */
1da177e4 1513 if (adapter->hw.mac_type == e1000_82545 ||
2648345f 1514 adapter->hw.mac_type == e1000_82546) {
1da177e4
LT		 1515 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1516 }
1517
1518 return TRUE;
1519}
1520
1521/**
1522 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1523 * @adapter: board private structure
581d708e 1524 * @txdr: tx descriptor ring (for a specific queue) to setup
1da177e4
LT		 1525 *
1526 * Return 0 on success, negative on failure
1527 **/
1528
3ad2cc67 1529static int
581d708e
MC		 1530e1000_setup_tx_resources(struct e1000_adapter *adapter,
1531 struct e1000_tx_ring *txdr)
1da177e4 1532{
1da177e4
LT		 1533 struct pci_dev *pdev = adapter->pdev;
1534 int size;
1535
1536 size = sizeof(struct e1000_buffer) * txdr->count;
cd94dd0b 1537 txdr->buffer_info = vmalloc(size);
96838a40 1538 if (!txdr->buffer_info) {
2648345f
MC		 1539 DPRINTK(PROBE, ERR,
1540 "Unable to allocate memory for the transmit descriptor ring\n");
1da177e4
LT		 1541 return -ENOMEM;
1542 }
1543 memset(txdr->buffer_info, 0, size);
1544
1545 /* round up to nearest 4K */
1546
1547 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1548 E1000_ROUNDUP(txdr->size, 4096);
1549
1550 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
96838a40 1551 if (!txdr->desc) {
1da177e4 1552setup_tx_desc_die:
1da177e4 1553 vfree(txdr->buffer_info);
2648345f
MC		 1554 DPRINTK(PROBE, ERR,
1555 "Unable to allocate memory for the transmit descriptor ring\n");
1da177e4
LT		 1556 return -ENOMEM;
1557 }
1558
2648345f 1559 /* Fix for errata 23, can't cross 64kB boundary */
1da177e4
LT		 1560 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1561 void *olddesc = txdr->desc;
1562 dma_addr_t olddma = txdr->dma;
2648345f
MC		 1563 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1564 "at %p\n", txdr->size, txdr->desc);
1565 /* Try again, without freeing the previous */
1da177e4 1566 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
2648345f 1567 /* Failed allocation, critical failure */
96838a40 1568 if (!txdr->desc) {
1da177e4
LT		 1569 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1570 goto setup_tx_desc_die;
1571 }
1572
1573 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1574 /* give up */
2648345f
MC		 1575 pci_free_consistent(pdev, txdr->size, txdr->desc,
1576 txdr->dma);
1da177e4
LT		 1577 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1578 DPRINTK(PROBE, ERR,
2648345f
MC		 1579 "Unable to allocate aligned memory "
1580 "for the transmit descriptor ring\n");
1da177e4
LT		 1581 vfree(txdr->buffer_info);
1582 return -ENOMEM;
1583 } else {
2648345f 1584 /* Free old allocation, new allocation was successful */
1da177e4
LT		 1585 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1586 }
1587 }
1588 memset(txdr->desc, 0, txdr->size);
1589
1590 txdr->next_to_use = 0;
1591 txdr->next_to_clean = 0;
2ae76d98 1592 spin_lock_init(&txdr->tx_lock);
1da177e4
LT		 1593
1594 return 0;
1595}
1596
581d708e
MC		 1597/**
1598 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1599 * (Descriptors) for all queues
1600 * @adapter: board private structure
1601 *
581d708e
MC		 1602 * Return 0 on success, negative on failure
1603 **/
1604
1605int
1606e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1607{
1608 int i, err = 0;
1609
f56799ea 1610 for (i = 0; i < adapter->num_tx_queues; i++) {
581d708e
MC		 1611 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1612 if (err) {
1613 DPRINTK(PROBE, ERR,
1614 "Allocation for Tx Queue %u failed\n", i);
3fbbc72e
VA		 1615 for (i-- ; i >= 0; i--)
1616 e1000_free_tx_resources(adapter,
1617 &adapter->tx_ring[i]);
581d708e
MC		 1618 break;
1619 }
1620 }
1621
1622 return err;
1623}
1624
1da177e4
LT		 1625/**
1626 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1627 * @adapter: board private structure
1628 *
1629 * Configure the Tx unit of the MAC after a reset.
1630 **/
1631
1632static void
1633e1000_configure_tx(struct e1000_adapter *adapter)
1634{
581d708e
MC		 1635 uint64_t tdba;
1636 struct e1000_hw *hw = &adapter->hw;
1637 uint32_t tdlen, tctl, tipg, tarc;
0fadb059 1638 uint32_t ipgr1, ipgr2;
1da177e4
LT		 1639
1640 /* Setup the HW Tx Head and Tail descriptor pointers */
1641
f56799ea 1642 switch (adapter->num_tx_queues) {
24025e4e
MC		 1643 case 1:
1644 default:
581d708e
MC		 1645 tdba = adapter->tx_ring[0].dma;
1646 tdlen = adapter->tx_ring[0].count *
1647 sizeof(struct e1000_tx_desc);
581d708e 1648 E1000_WRITE_REG(hw, TDLEN, tdlen);
4ca213a6
AK		 1649 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1650 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
581d708e 1651 E1000_WRITE_REG(hw, TDT, 0);
4ca213a6 1652 E1000_WRITE_REG(hw, TDH, 0);
6a951698
AK		 1653 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1654 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
24025e4e
MC		 1655 break;
1656 }
1da177e4
LT		 1657
1658 /* Set the default values for the Tx Inter Packet Gap timer */
d89b6c67
JB		 1659 if (adapter->hw.mac_type <= e1000_82547_rev_2 &&
1660 (hw->media_type == e1000_media_type_fiber ||
1661 hw->media_type == e1000_media_type_internal_serdes))
0fadb059
JK		 1662 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1663 else
1664 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1665
581d708e 1666 switch (hw->mac_type) {
1da177e4
LT		 1667 case e1000_82542_rev2_0:
1668 case e1000_82542_rev2_1:
1669 tipg = DEFAULT_82542_TIPG_IPGT;
0fadb059
JK		 1670 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1671 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1da177e4 1672 break;
87041639
JK		 1673 case e1000_80003es2lan:
1674 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1675 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1676 break;
1da177e4 1677 default:
0fadb059
JK		 1678 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1679 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1680 break;
1da177e4 1681 }
0fadb059
JK		 1682 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1683 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
581d708e 1684 E1000_WRITE_REG(hw, TIPG, tipg);
1da177e4
LT		 1685
1686 /* Set the Tx Interrupt Delay register */
1687
581d708e
MC		 1688 E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1689 if (hw->mac_type >= e1000_82540)
1690 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1da177e4
LT		 1691
1692 /* Program the Transmit Control Register */
1693
581d708e 1694 tctl = E1000_READ_REG(hw, TCTL);
1da177e4 1695 tctl &= ~E1000_TCTL_CT;
7e6c9861 1696 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1da177e4
LT		 1697 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1698
2ae76d98
MC		 1699 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1700 tarc = E1000_READ_REG(hw, TARC0);
90fb5135
AK		 1701 /* set the speed mode bit, we'll clear it if we're not at
1702 * gigabit link later */
09ae3e88 1703 tarc |= (1 << 21);
2ae76d98 1704 E1000_WRITE_REG(hw, TARC0, tarc);
87041639
JK		 1705 } else if (hw->mac_type == e1000_80003es2lan) {
1706 tarc = E1000_READ_REG(hw, TARC0);
1707 tarc |= 1;
87041639
JK		 1708 E1000_WRITE_REG(hw, TARC0, tarc);
1709 tarc = E1000_READ_REG(hw, TARC1);
1710 tarc |= 1;
1711 E1000_WRITE_REG(hw, TARC1, tarc);
2ae76d98
MC		 1712 }
1713
581d708e 1714 e1000_config_collision_dist(hw);
1da177e4
LT		 1715
1716 /* Setup Transmit Descriptor Settings for eop descriptor */
6a042dab
JB		 1717 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1718
1719 /* only set IDE if we are delaying interrupts using the timers */
1720 if (adapter->tx_int_delay)
1721 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1da177e4 1722
581d708e 1723 if (hw->mac_type < e1000_82543)
1da177e4
LT		 1724 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1725 else
1726 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1727
1728 /* Cache if we're 82544 running in PCI-X because we'll
1729 * need this to apply a workaround later in the send path. */
581d708e
MC		 1730 if (hw->mac_type == e1000_82544 &&
1731 hw->bus_type == e1000_bus_type_pcix)
1da177e4 1732 adapter->pcix_82544 = 1;
7e6c9861
JK		 1733
1734 E1000_WRITE_REG(hw, TCTL, tctl);
1735
1da177e4
LT		 1736}
1737
1738/**
1739 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1740 * @adapter: board private structure
581d708e 1741 * @rxdr: rx descriptor ring (for a specific queue) to setup
1da177e4
LT		 1742 *
1743 * Returns 0 on success, negative on failure
1744 **/
1745
3ad2cc67 1746static int
581d708e
MC		 1747e1000_setup_rx_resources(struct e1000_adapter *adapter,
1748 struct e1000_rx_ring *rxdr)
1da177e4 1749{
1da177e4 1750 struct pci_dev *pdev = adapter->pdev;
2d7edb92 1751 int size, desc_len;
1da177e4
LT		 1752
1753 size = sizeof(struct e1000_buffer) * rxdr->count;
cd94dd0b 1754 rxdr->buffer_info = vmalloc(size);
581d708e 1755 if (!rxdr->buffer_info) {
2648345f
MC		 1756 DPRINTK(PROBE, ERR,
1757 "Unable to allocate memory for the receive descriptor ring\n");
1da177e4
LT		 1758 return -ENOMEM;
1759 }
1760 memset(rxdr->buffer_info, 0, size);
1761
2d7edb92
MC		 1762 size = sizeof(struct e1000_ps_page) * rxdr->count;
1763 rxdr->ps_page = kmalloc(size, GFP_KERNEL);
96838a40 1764 if (!rxdr->ps_page) {
2d7edb92
MC		 1765 vfree(rxdr->buffer_info);
1766 DPRINTK(PROBE, ERR,
1767 "Unable to allocate memory for the receive descriptor ring\n");
1768 return -ENOMEM;
1769 }
1770 memset(rxdr->ps_page, 0, size);
1771
1772 size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1773 rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
96838a40 1774 if (!rxdr->ps_page_dma) {
2d7edb92
MC		 1775 vfree(rxdr->buffer_info);
1776 kfree(rxdr->ps_page);
1777 DPRINTK(PROBE, ERR,
1778 "Unable to allocate memory for the receive descriptor ring\n");
1779 return -ENOMEM;
1780 }
1781 memset(rxdr->ps_page_dma, 0, size);
1782
96838a40 1783 if (adapter->hw.mac_type <= e1000_82547_rev_2)
2d7edb92
MC		 1784 desc_len = sizeof(struct e1000_rx_desc);
1785 else
1786 desc_len = sizeof(union e1000_rx_desc_packet_split);
1787
1da177e4
LT		 1788 /* Round up to nearest 4K */
1789
2d7edb92 1790 rxdr->size = rxdr->count * desc_len;
1da177e4
LT		 1791 E1000_ROUNDUP(rxdr->size, 4096);
1792
1793 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1794
581d708e
MC		 1795 if (!rxdr->desc) {
1796 DPRINTK(PROBE, ERR,
1797 "Unable to allocate memory for the receive descriptor ring\n");
1da177e4 1798setup_rx_desc_die:
1da177e4 1799 vfree(rxdr->buffer_info);
2d7edb92
MC		 1800 kfree(rxdr->ps_page);
1801 kfree(rxdr->ps_page_dma);
1da177e4
LT		 1802 return -ENOMEM;
1803 }
1804
2648345f 1805 /* Fix for errata 23, can't cross 64kB boundary */
1da177e4
LT		 1806 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1807 void *olddesc = rxdr->desc;
1808 dma_addr_t olddma = rxdr->dma;
2648345f
MC		 1809 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1810 "at %p\n", rxdr->size, rxdr->desc);
1811 /* Try again, without freeing the previous */
1da177e4 1812 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
2648345f 1813 /* Failed allocation, critical failure */
581d708e 1814 if (!rxdr->desc) {
1da177e4 1815 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
581d708e
MC		 1816 DPRINTK(PROBE, ERR,
1817 "Unable to allocate memory "
1818 "for the receive descriptor ring\n");
1da177e4
LT		 1819 goto setup_rx_desc_die;
1820 }
1821
1822 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1823 /* give up */
2648345f
MC		 1824 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1825 rxdr->dma);
1da177e4 1826 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
2648345f
MC		 1827 DPRINTK(PROBE, ERR,
1828 "Unable to allocate aligned memory "
1829 "for the receive descriptor ring\n");
581d708e 1830 goto setup_rx_desc_die;
1da177e4 1831 } else {
2648345f 1832 /* Free old allocation, new allocation was successful */
1da177e4
LT		 1833 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1834 }
1835 }
1836 memset(rxdr->desc, 0, rxdr->size);
1837
1838 rxdr->next_to_clean = 0;
1839 rxdr->next_to_use = 0;
1840
1841 return 0;
1842}
1843
581d708e
MC		 1844/**
1845 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1846 * (Descriptors) for all queues
1847 * @adapter: board private structure
1848 *
581d708e
MC		 1849 * Return 0 on success, negative on failure
1850 **/
1851
1852int
1853e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1854{
1855 int i, err = 0;
1856
f56799ea 1857 for (i = 0; i < adapter->num_rx_queues; i++) {
581d708e
MC		 1858 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1859 if (err) {
1860 DPRINTK(PROBE, ERR,
1861 "Allocation for Rx Queue %u failed\n", i);
3fbbc72e
VA		 1862 for (i-- ; i >= 0; i--)
1863 e1000_free_rx_resources(adapter,
1864 &adapter->rx_ring[i]);
581d708e
MC		 1865 break;
1866 }
1867 }
1868
1869 return err;
1870}
1871
1da177e4 1872/**
2648345f 1873 * e1000_setup_rctl - configure the receive control registers
1da177e4
LT		 1874 * @adapter: Board private structure
1875 **/
e4c811c9
MC		 1876#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1877 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1da177e4
LT		 1878static void
1879e1000_setup_rctl(struct e1000_adapter *adapter)
1880{
2d7edb92
MC		 1881 uint32_t rctl, rfctl;
1882 uint32_t psrctl = 0;
35ec56bb 1883#ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
e4c811c9
MC		 1884 uint32_t pages = 0;
1885#endif
1da177e4
LT		 1886
1887 rctl = E1000_READ_REG(&adapter->hw, RCTL);
1888
1889 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1890
1891 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1892 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1893 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1894
0fadb059 1895 if (adapter->hw.tbi_compatibility_on == 1)
1da177e4
LT		 1896 rctl |= E1000_RCTL_SBP;
1897 else
1898 rctl &= ~E1000_RCTL_SBP;
1899
2d7edb92
MC		 1900 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1901 rctl &= ~E1000_RCTL_LPE;
1902 else
1903 rctl |= E1000_RCTL_LPE;
1904
1da177e4 1905 /* Setup buffer sizes */
9e2feace
AK		 1906 rctl &= ~E1000_RCTL_SZ_4096;
1907 rctl |= E1000_RCTL_BSEX;
1908 switch (adapter->rx_buffer_len) {
1909 case E1000_RXBUFFER_256:
1910 rctl |= E1000_RCTL_SZ_256;
1911 rctl &= ~E1000_RCTL_BSEX;
1912 break;
1913 case E1000_RXBUFFER_512:
1914 rctl |= E1000_RCTL_SZ_512;
1915 rctl &= ~E1000_RCTL_BSEX;
1916 break;
1917 case E1000_RXBUFFER_1024:
1918 rctl |= E1000_RCTL_SZ_1024;
1919 rctl &= ~E1000_RCTL_BSEX;
1920 break;
a1415ee6
JK		 1921 case E1000_RXBUFFER_2048:
1922 default:
1923 rctl |= E1000_RCTL_SZ_2048;
1924 rctl &= ~E1000_RCTL_BSEX;
1925 break;
1926 case E1000_RXBUFFER_4096:
1927 rctl |= E1000_RCTL_SZ_4096;
1928 break;
1929 case E1000_RXBUFFER_8192:
1930 rctl |= E1000_RCTL_SZ_8192;
1931 break;
1932 case E1000_RXBUFFER_16384:
1933 rctl |= E1000_RCTL_SZ_16384;
1934 break;
2d7edb92
MC		 1935 }
1936
35ec56bb 1937#ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
2d7edb92
MC		 1938 /* 82571 and greater support packet-split where the protocol
1939 * header is placed in skb->data and the packet data is
1940 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1941 * In the case of a non-split, skb->data is linearly filled,
1942 * followed by the page buffers. Therefore, skb->data is
1943 * sized to hold the largest protocol header.
1944 */
e64d7d02
JB		 1945 /* allocations using alloc_page take too long for regular MTU
1946 * so only enable packet split for jumbo frames */
e4c811c9 1947 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
e64d7d02
JB		 1948 if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
1949 PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
e4c811c9
MC		 1950 adapter->rx_ps_pages = pages;
1951 else
1952 adapter->rx_ps_pages = 0;
2d7edb92 1953#endif
e4c811c9 1954 if (adapter->rx_ps_pages) {
2d7edb92
MC		 1955 /* Configure extra packet-split registers */
1956 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1957 rfctl |= E1000_RFCTL_EXTEN;
87ca4e5b
AK		 1958 /* disable packet split support for IPv6 extension headers,
1959 * because some malformed IPv6 headers can hang the RX */
1960 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
1961 E1000_RFCTL_NEW_IPV6_EXT_DIS);
1962
2d7edb92
MC		 1963 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1964
7dfee0cb 1965 rctl |= E1000_RCTL_DTYP_PS;
96838a40 1966
2d7edb92
MC		 1967 psrctl |= adapter->rx_ps_bsize0 >>
1968 E1000_PSRCTL_BSIZE0_SHIFT;
e4c811c9
MC		 1969
1970 switch (adapter->rx_ps_pages) {
1971 case 3:
1972 psrctl |= PAGE_SIZE <<
1973 E1000_PSRCTL_BSIZE3_SHIFT;
1974 case 2:
1975 psrctl |= PAGE_SIZE <<
1976 E1000_PSRCTL_BSIZE2_SHIFT;
1977 case 1:
1978 psrctl |= PAGE_SIZE >>
1979 E1000_PSRCTL_BSIZE1_SHIFT;
1980 break;
1981 }
2d7edb92
MC		 1982
1983 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1da177e4
LT		 1984 }
1985
1986 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1987}
1988
1989/**
1990 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1991 * @adapter: board private structure
1992 *
1993 * Configure the Rx unit of the MAC after a reset.
1994 **/
1995
1996static void
1997e1000_configure_rx(struct e1000_adapter *adapter)
1998{
581d708e
MC		 1999 uint64_t rdba;
2000 struct e1000_hw *hw = &adapter->hw;
2001 uint32_t rdlen, rctl, rxcsum, ctrl_ext;
2d7edb92 2002
e4c811c9 2003 if (adapter->rx_ps_pages) {
0f15a8fa 2004 /* this is a 32 byte descriptor */
581d708e 2005 rdlen = adapter->rx_ring[0].count *
2d7edb92
MC		 2006 sizeof(union e1000_rx_desc_packet_split);
2007 adapter->clean_rx = e1000_clean_rx_irq_ps;
2008 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2009 } else {
581d708e
MC		 2010 rdlen = adapter->rx_ring[0].count *
2011 sizeof(struct e1000_rx_desc);
2d7edb92
MC		 2012 adapter->clean_rx = e1000_clean_rx_irq;
2013 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2014 }
1da177e4
LT		 2015
2016 /* disable receives while setting up the descriptors */
581d708e
MC		 2017 rctl = E1000_READ_REG(hw, RCTL);
2018 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1da177e4
LT		 2019
2020 /* set the Receive Delay Timer Register */
581d708e 2021 E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1da177e4 2022
581d708e
MC		 2023 if (hw->mac_type >= e1000_82540) {
2024 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
835bb129 2025 if (adapter->itr_setting != 0)
581d708e 2026 E1000_WRITE_REG(hw, ITR,
1da177e4
LT		 2027 1000000000 / (adapter->itr * 256));
2028 }
2029
2ae76d98 2030 if (hw->mac_type >= e1000_82571) {
2ae76d98 2031 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1e613fd9 2032 /* Reset delay timers after every interrupt */
6fc7a7ec 2033 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1e613fd9 2034#ifdef CONFIG_E1000_NAPI
835bb129 2035 /* Auto-Mask interrupts upon ICR access */
1e613fd9 2036 ctrl_ext |= E1000_CTRL_EXT_IAME;
835bb129 2037 E1000_WRITE_REG(hw, IAM, 0xffffffff);
1e613fd9 2038#endif
2ae76d98
MC		 2039 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
2040 E1000_WRITE_FLUSH(hw);
2041 }
2042
581d708e
MC		 2043 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2044 * the Base and Length of the Rx Descriptor Ring */
f56799ea 2045 switch (adapter->num_rx_queues) {
24025e4e
MC		 2046 case 1:
2047 default:
581d708e 2048 rdba = adapter->rx_ring[0].dma;
581d708e 2049 E1000_WRITE_REG(hw, RDLEN, rdlen);
4ca213a6
AK		 2050 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
2051 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
581d708e 2052 E1000_WRITE_REG(hw, RDT, 0);
4ca213a6 2053 E1000_WRITE_REG(hw, RDH, 0);
6a951698
AK		 2054 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2055 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
581d708e 2056 break;
24025e4e
MC		 2057 }
2058
1da177e4 2059 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
581d708e
MC		 2060 if (hw->mac_type >= e1000_82543) {
2061 rxcsum = E1000_READ_REG(hw, RXCSUM);
96838a40 2062 if (adapter->rx_csum == TRUE) {
2d7edb92
MC		 2063 rxcsum |= E1000_RXCSUM_TUOFL;
2064
868d5309 2065 /* Enable 82571 IPv4 payload checksum for UDP fragments
2d7edb92 2066 * Must be used in conjunction with packet-split. */
96838a40
JB		 2067 if ((hw->mac_type >= e1000_82571) &&
2068 (adapter->rx_ps_pages)) {
2d7edb92
MC		 2069 rxcsum |= E1000_RXCSUM_IPPCSE;
2070 }
2071 } else {
2072 rxcsum &= ~E1000_RXCSUM_TUOFL;
2073 /* don't need to clear IPPCSE as it defaults to 0 */
2074 }
581d708e 2075 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1da177e4
LT		 2076 }
2077
21c4d5e0
AK		 2078 /* enable early receives on 82573, only takes effect if using > 2048
2079 * byte total frame size. for example only for jumbo frames */
2080#define E1000_ERT_2048 0x100
2081 if (hw->mac_type == e1000_82573)
2082 E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
2083
1da177e4 2084 /* Enable Receives */
581d708e 2085 E1000_WRITE_REG(hw, RCTL, rctl);
1da177e4
LT		 2086}
2087
2088/**
581d708e 2089 * e1000_free_tx_resources - Free Tx Resources per Queue
1da177e4 2090 * @adapter: board private structure
581d708e 2091 * @tx_ring: Tx descriptor ring for a specific queue
1da177e4
LT		 2092 *
2093 * Free all transmit software resources
2094 **/
2095
3ad2cc67 2096static void
581d708e
MC		 2097e1000_free_tx_resources(struct e1000_adapter *adapter,
2098 struct e1000_tx_ring *tx_ring)
1da177e4
LT		 2099{
2100 struct pci_dev *pdev = adapter->pdev;
2101
581d708e 2102 e1000_clean_tx_ring(adapter, tx_ring);
1da177e4 2103
581d708e
MC		 2104 vfree(tx_ring->buffer_info);
2105 tx_ring->buffer_info = NULL;
1da177e4 2106
581d708e 2107 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1da177e4 2108
581d708e
MC		 2109 tx_ring->desc = NULL;
2110}
2111
2112/**
2113 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2114 * @adapter: board private structure
2115 *
2116 * Free all transmit software resources
2117 **/
2118
2119void
2120e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2121{
2122 int i;
2123
f56799ea 2124 for (i = 0; i < adapter->num_tx_queues; i++)
581d708e 2125 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1da177e4
LT		 2126}
2127
e619d523 2128static void
1da177e4
LT		 2129e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2130 struct e1000_buffer *buffer_info)
2131{
96838a40 2132 if (buffer_info->dma) {
2648345f
MC		 2133 pci_unmap_page(adapter->pdev,
2134 buffer_info->dma,
2135 buffer_info->length,
2136 PCI_DMA_TODEVICE);
a9ebadd6 2137 buffer_info->dma = 0;
1da177e4 2138 }
a9ebadd6 2139 if (buffer_info->skb) {
1da177e4 2140 dev_kfree_skb_any(buffer_info->skb);
a9ebadd6
JB		 2141 buffer_info->skb = NULL;
2142 }
2143 /* buffer_info must be completely set up in the transmit path */
1da177e4
LT		 2144}
2145
2146/**
2147 * e1000_clean_tx_ring - Free Tx Buffers
2148 * @adapter: board private structure
581d708e 2149 * @tx_ring: ring to be cleaned
1da177e4
LT		 2150 **/
2151
2152static void
581d708e
MC		 2153e1000_clean_tx_ring(struct e1000_adapter *adapter,
2154 struct e1000_tx_ring *tx_ring)
1da177e4 2155{
1da177e4
LT		 2156 struct e1000_buffer *buffer_info;
2157 unsigned long size;
2158 unsigned int i;
2159
2160 /* Free all the Tx ring sk_buffs */
2161
96838a40 2162 for (i = 0; i < tx_ring->count; i++) {
1da177e4
LT		 2163 buffer_info = &tx_ring->buffer_info[i];
2164 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2165 }
2166
2167 size = sizeof(struct e1000_buffer) * tx_ring->count;
2168 memset(tx_ring->buffer_info, 0, size);
2169
2170 /* Zero out the descriptor ring */
2171
2172 memset(tx_ring->desc, 0, tx_ring->size);
2173
2174 tx_ring->next_to_use = 0;
2175 tx_ring->next_to_clean = 0;
fd803241 2176 tx_ring->last_tx_tso = 0;
1da177e4 2177
581d708e
MC		 2178 writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2179 writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2180}
2181
2182/**
2183 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2184 * @adapter: board private structure
2185 **/
2186
2187static void
2188e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2189{
2190 int i;
2191
f56799ea 2192 for (i = 0; i < adapter->num_tx_queues; i++)
581d708e 2193 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1da177e4
LT		 2194}
2195
2196/**
2197 * e1000_free_rx_resources - Free Rx Resources
2198 * @adapter: board private structure
581d708e 2199 * @rx_ring: ring to clean the resources from
1da177e4
LT		 2200 *
2201 * Free all receive software resources
2202 **/
2203
3ad2cc67 2204static void
581d708e
MC		 2205e1000_free_rx_resources(struct e1000_adapter *adapter,
2206 struct e1000_rx_ring *rx_ring)
1da177e4 2207{
1da177e4
LT		 2208 struct pci_dev *pdev = adapter->pdev;
2209
581d708e 2210 e1000_clean_rx_ring(adapter, rx_ring);
1da177e4
LT		 2211
2212 vfree(rx_ring->buffer_info);
2213 rx_ring->buffer_info = NULL;
2d7edb92
MC		 2214 kfree(rx_ring->ps_page);
2215 rx_ring->ps_page = NULL;
2216 kfree(rx_ring->ps_page_dma);
2217 rx_ring->ps_page_dma = NULL;
1da177e4
LT		 2218
2219 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2220
2221 rx_ring->desc = NULL;
2222}
2223
2224/**
581d708e 2225 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1da177e4 2226 * @adapter: board private structure
581d708e
MC		 2227 *
2228 * Free all receive software resources
2229 **/
2230
2231void
2232e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2233{
2234 int i;
2235
f56799ea 2236 for (i = 0; i < adapter->num_rx_queues; i++)
581d708e
MC		 2237 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2238}
2239
2240/**
2241 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2242 * @adapter: board private structure
2243 * @rx_ring: ring to free buffers from
1da177e4
LT		 2244 **/
2245
2246static void
581d708e
MC		 2247e1000_clean_rx_ring(struct e1000_adapter *adapter,
2248 struct e1000_rx_ring *rx_ring)
1da177e4 2249{
1da177e4 2250 struct e1000_buffer *buffer_info;
2d7edb92
MC		 2251 struct e1000_ps_page *ps_page;
2252 struct e1000_ps_page_dma *ps_page_dma;
1da177e4
LT		 2253 struct pci_dev *pdev = adapter->pdev;
2254 unsigned long size;
2d7edb92 2255 unsigned int i, j;
1da177e4
LT		 2256
2257 /* Free all the Rx ring sk_buffs */
96838a40 2258 for (i = 0; i < rx_ring->count; i++) {
1da177e4 2259 buffer_info = &rx_ring->buffer_info[i];
96838a40 2260 if (buffer_info->skb) {
1da177e4
LT		 2261 pci_unmap_single(pdev,
2262 buffer_info->dma,
2263 buffer_info->length,
2264 PCI_DMA_FROMDEVICE);
2265
2266 dev_kfree_skb(buffer_info->skb);
2267 buffer_info->skb = NULL;
997f5cbd
JK		 2268 }
2269 ps_page = &rx_ring->ps_page[i];
2270 ps_page_dma = &rx_ring->ps_page_dma[i];
2271 for (j = 0; j < adapter->rx_ps_pages; j++) {
2272 if (!ps_page->ps_page[j]) break;
2273 pci_unmap_page(pdev,
2274 ps_page_dma->ps_page_dma[j],
2275 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2276 ps_page_dma->ps_page_dma[j] = 0;
2277 put_page(ps_page->ps_page[j]);
2278 ps_page->ps_page[j] = NULL;
1da177e4
LT		 2279 }
2280 }
2281
2282 size = sizeof(struct e1000_buffer) * rx_ring->count;
2283 memset(rx_ring->buffer_info, 0, size);
2d7edb92
MC		 2284 size = sizeof(struct e1000_ps_page) * rx_ring->count;
2285 memset(rx_ring->ps_page, 0, size);
2286 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2287 memset(rx_ring->ps_page_dma, 0, size);
1da177e4
LT		 2288
2289 /* Zero out the descriptor ring */
2290
2291 memset(rx_ring->desc, 0, rx_ring->size);
2292
2293 rx_ring->next_to_clean = 0;
2294 rx_ring->next_to_use = 0;
2295
581d708e
MC		 2296 writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2297 writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2298}
2299
2300/**
2301 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2302 * @adapter: board private structure
2303 **/
2304
2305static void
2306e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2307{
2308 int i;
2309
f56799ea 2310 for (i = 0; i < adapter->num_rx_queues; i++)
581d708e 2311 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1da177e4
LT		 2312}
2313
2314/* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2315 * and memory write and invalidate disabled for certain operations
2316 */
2317static void
2318e1000_enter_82542_rst(struct e1000_adapter *adapter)
2319{
2320 struct net_device *netdev = adapter->netdev;
2321 uint32_t rctl;
2322
2323 e1000_pci_clear_mwi(&adapter->hw);
2324
2325 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2326 rctl |= E1000_RCTL_RST;
2327 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2328 E1000_WRITE_FLUSH(&adapter->hw);
2329 mdelay(5);
2330
96838a40 2331 if (netif_running(netdev))
581d708e 2332 e1000_clean_all_rx_rings(adapter);
1da177e4
LT		 2333}
2334
2335static void
2336e1000_leave_82542_rst(struct e1000_adapter *adapter)
2337{
2338 struct net_device *netdev = adapter->netdev;
2339 uint32_t rctl;
2340
2341 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2342 rctl &= ~E1000_RCTL_RST;
2343 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2344 E1000_WRITE_FLUSH(&adapter->hw);
2345 mdelay(5);
2346
96838a40 2347 if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
1da177e4
LT		 2348 e1000_pci_set_mwi(&adapter->hw);
2349
96838a40 2350 if (netif_running(netdev)) {
72d64a43
JK		 2351 /* No need to loop, because 82542 supports only 1 queue */
2352 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
7c4d3367 2353 e1000_configure_rx(adapter);
72d64a43 2354 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
1da177e4
LT		 2355 }
2356}
2357
2358/**
2359 * e1000_set_mac - Change the Ethernet Address of the NIC
2360 * @netdev: network interface device structure
2361 * @p: pointer to an address structure
2362 *
2363 * Returns 0 on success, negative on failure
2364 **/
2365
2366static int
2367e1000_set_mac(struct net_device *netdev, void *p)
2368{
60490fe0 2369 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 2370 struct sockaddr *addr = p;
2371
96838a40 2372 if (!is_valid_ether_addr(addr->sa_data))
1da177e4
LT		 2373 return -EADDRNOTAVAIL;
2374
2375 /* 82542 2.0 needs to be in reset to write receive address registers */
2376
96838a40 2377 if (adapter->hw.mac_type == e1000_82542_rev2_0)
1da177e4
LT		 2378 e1000_enter_82542_rst(adapter);
2379
2380 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2381 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2382
2383 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2384
868d5309
MC		 2385 /* With 82571 controllers, LAA may be overwritten (with the default)
2386 * due to controller reset from the other port. */
2387 if (adapter->hw.mac_type == e1000_82571) {
2388 /* activate the work around */
2389 adapter->hw.laa_is_present = 1;
2390
96838a40
JB		 2391 /* Hold a copy of the LAA in RAR[14] This is done so that
2392 * between the time RAR[0] gets clobbered and the time it
2393 * gets fixed (in e1000_watchdog), the actual LAA is in one
868d5309 2394 * of the RARs and no incoming packets directed to this port
96838a40 2395 * are dropped. Eventaully the LAA will be in RAR[0] and
868d5309 2396 * RAR[14] */
96838a40 2397 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
868d5309
MC		 2398 E1000_RAR_ENTRIES - 1);
2399 }
2400
96838a40 2401 if (adapter->hw.mac_type == e1000_82542_rev2_0)
1da177e4
LT		 2402 e1000_leave_82542_rst(adapter);
2403
2404 return 0;
2405}
2406
2407/**
2408 * e1000_set_multi - Multicast and Promiscuous mode set
2409 * @netdev: network interface device structure
2410 *
2411 * The set_multi entry point is called whenever the multicast address
2412 * list or the network interface flags are updated. This routine is
2413 * responsible for configuring the hardware for proper multicast,
2414 * promiscuous mode, and all-multi behavior.
2415 **/
2416
2417static void
2418e1000_set_multi(struct net_device *netdev)
2419{
60490fe0 2420 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 2421 struct e1000_hw *hw = &adapter->hw;
2422 struct dev_mc_list *mc_ptr;
2423 uint32_t rctl;
2424 uint32_t hash_value;
868d5309 2425 int i, rar_entries = E1000_RAR_ENTRIES;
cd94dd0b
AK		 2426 int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2427 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2428 E1000_NUM_MTA_REGISTERS;
2429
2430 if (adapter->hw.mac_type == e1000_ich8lan)
2431 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
1da177e4 2432
868d5309
MC		 2433 /* reserve RAR[14] for LAA over-write work-around */
2434 if (adapter->hw.mac_type == e1000_82571)
2435 rar_entries--;
1da177e4 2436
2648345f
MC		 2437 /* Check for Promiscuous and All Multicast modes */
2438
1da177e4
LT		 2439 rctl = E1000_READ_REG(hw, RCTL);
2440
96838a40 2441 if (netdev->flags & IFF_PROMISC) {
1da177e4 2442 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
96838a40 2443 } else if (netdev->flags & IFF_ALLMULTI) {
1da177e4
LT		 2444 rctl |= E1000_RCTL_MPE;
2445 rctl &= ~E1000_RCTL_UPE;
2446 } else {
2447 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2448 }
2449
2450 E1000_WRITE_REG(hw, RCTL, rctl);
2451
2452 /* 82542 2.0 needs to be in reset to write receive address registers */
2453
96838a40 2454 if (hw->mac_type == e1000_82542_rev2_0)
1da177e4
LT		 2455 e1000_enter_82542_rst(adapter);
2456
2457 /* load the first 14 multicast address into the exact filters 1-14
2458 * RAR 0 is used for the station MAC adddress
2459 * if there are not 14 addresses, go ahead and clear the filters
868d5309 2460 * -- with 82571 controllers only 0-13 entries are filled here
1da177e4
LT		 2461 */
2462 mc_ptr = netdev->mc_list;
2463
96838a40 2464 for (i = 1; i < rar_entries; i++) {
868d5309 2465 if (mc_ptr) {
1da177e4
LT		 2466 e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2467 mc_ptr = mc_ptr->next;
2468 } else {
2469 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
4ca213a6 2470 E1000_WRITE_FLUSH(hw);
1da177e4 2471 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
4ca213a6 2472 E1000_WRITE_FLUSH(hw);
1da177e4
LT		 2473 }
2474 }
2475
2476 /* clear the old settings from the multicast hash table */
2477
cd94dd0b 2478 for (i = 0; i < mta_reg_count; i++) {
1da177e4 2479 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
4ca213a6
AK		 2480 E1000_WRITE_FLUSH(hw);
2481 }
1da177e4
LT		 2482
2483 /* load any remaining addresses into the hash table */
2484
96838a40 2485 for (; mc_ptr; mc_ptr = mc_ptr->next) {
1da177e4
LT		 2486 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2487 e1000_mta_set(hw, hash_value);
2488 }
2489
96838a40 2490 if (hw->mac_type == e1000_82542_rev2_0)
1da177e4 2491 e1000_leave_82542_rst(adapter);
1da177e4
LT		 2492}
2493
2494/* Need to wait a few seconds after link up to get diagnostic information from
2495 * the phy */
2496
2497static void
2498e1000_update_phy_info(unsigned long data)
2499{
2500 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2501 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2502}
2503
2504/**
2505 * e1000_82547_tx_fifo_stall - Timer Call-back
2506 * @data: pointer to adapter cast into an unsigned long
2507 **/
2508
2509static void
2510e1000_82547_tx_fifo_stall(unsigned long data)
2511{
2512 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2513 struct net_device *netdev = adapter->netdev;
2514 uint32_t tctl;
2515
96838a40
JB		 2516 if (atomic_read(&adapter->tx_fifo_stall)) {
2517 if ((E1000_READ_REG(&adapter->hw, TDT) ==
1da177e4
LT		 2518 E1000_READ_REG(&adapter->hw, TDH)) &&
2519 (E1000_READ_REG(&adapter->hw, TDFT) ==
2520 E1000_READ_REG(&adapter->hw, TDFH)) &&
2521 (E1000_READ_REG(&adapter->hw, TDFTS) ==
2522 E1000_READ_REG(&adapter->hw, TDFHS))) {
2523 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2524 E1000_WRITE_REG(&adapter->hw, TCTL,
2525 tctl & ~E1000_TCTL_EN);
2526 E1000_WRITE_REG(&adapter->hw, TDFT,
2527 adapter->tx_head_addr);
2528 E1000_WRITE_REG(&adapter->hw, TDFH,
2529 adapter->tx_head_addr);
2530 E1000_WRITE_REG(&adapter->hw, TDFTS,
2531 adapter->tx_head_addr);
2532 E1000_WRITE_REG(&adapter->hw, TDFHS,
2533 adapter->tx_head_addr);
2534 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2535 E1000_WRITE_FLUSH(&adapter->hw);
2536
2537 adapter->tx_fifo_head = 0;
2538 atomic_set(&adapter->tx_fifo_stall, 0);
2539 netif_wake_queue(netdev);
2540 } else {
2541 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2542 }
2543 }
2544}
2545
2546/**
2547 * e1000_watchdog - Timer Call-back
2548 * @data: pointer to adapter cast into an unsigned long
2549 **/
2550static void
2551e1000_watchdog(unsigned long data)
2552{
2553 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1da177e4 2554 struct net_device *netdev = adapter->netdev;
545c67c0 2555 struct e1000_tx_ring *txdr = adapter->tx_ring;
7e6c9861 2556 uint32_t link, tctl;
cd94dd0b
AK		 2557 int32_t ret_val;
2558
2559 ret_val = e1000_check_for_link(&adapter->hw);
2560 if ((ret_val == E1000_ERR_PHY) &&
2561 (adapter->hw.phy_type == e1000_phy_igp_3) &&
2562 (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2563 /* See e1000_kumeran_lock_loss_workaround() */
2564 DPRINTK(LINK, INFO,
2565 "Gigabit has been disabled, downgrading speed\n");
2566 }
90fb5135 2567
2d7edb92
MC		 2568 if (adapter->hw.mac_type == e1000_82573) {
2569 e1000_enable_tx_pkt_filtering(&adapter->hw);
96838a40 2570 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2d7edb92 2571 e1000_update_mng_vlan(adapter);
96838a40 2572 }
1da177e4 2573
96838a40 2574 if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
1da177e4
LT		 2575 !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2576 link = !adapter->hw.serdes_link_down;
2577 else
2578 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2579
96838a40
JB		 2580 if (link) {
2581 if (!netif_carrier_ok(netdev)) {
9669f53b 2582 uint32_t ctrl;
fe7fe28e 2583 boolean_t txb2b = 1;
1da177e4
LT		 2584 e1000_get_speed_and_duplex(&adapter->hw,
2585 &adapter->link_speed,
2586 &adapter->link_duplex);
2587
9669f53b
AK		 2588 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2589 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2590 "Flow Control: %s\n",
2591 adapter->link_speed,
2592 adapter->link_duplex == FULL_DUPLEX ?
2593 "Full Duplex" : "Half Duplex",
2594 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2595 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2596 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2597 E1000_CTRL_TFCE) ? "TX" : "None" )));
1da177e4 2598
7e6c9861
JK		 2599 /* tweak tx_queue_len according to speed/duplex
2600 * and adjust the timeout factor */
66a2b0a3
JK		 2601 netdev->tx_queue_len = adapter->tx_queue_len;
2602 adapter->tx_timeout_factor = 1;
7e6c9861
JK		 2603 switch (adapter->link_speed) {
2604 case SPEED_10:
fe7fe28e 2605 txb2b = 0;
7e6c9861
JK		 2606 netdev->tx_queue_len = 10;
2607 adapter->tx_timeout_factor = 8;
2608 break;
2609 case SPEED_100:
fe7fe28e 2610 txb2b = 0;
7e6c9861
JK		 2611 netdev->tx_queue_len = 100;
2612 /* maybe add some timeout factor ? */
2613 break;
2614 }
2615
fe7fe28e 2616 if ((adapter->hw.mac_type == e1000_82571 ||
7e6c9861 2617 adapter->hw.mac_type == e1000_82572) &&
fe7fe28e 2618 txb2b == 0) {
7e6c9861
JK		 2619 uint32_t tarc0;
2620 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
90fb5135 2621 tarc0 &= ~(1 << 21);
7e6c9861
JK		 2622 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2623 }
90fb5135 2624
7e6c9861
JK		 2625 /* disable TSO for pcie and 10/100 speeds, to avoid
2626 * some hardware issues */
2627 if (!adapter->tso_force &&
2628 adapter->hw.bus_type == e1000_bus_type_pci_express){
66a2b0a3
JK		 2629 switch (adapter->link_speed) {
2630 case SPEED_10:
66a2b0a3 2631 case SPEED_100:
7e6c9861
JK		 2632 DPRINTK(PROBE,INFO,
2633 "10/100 speed: disabling TSO\n");
2634 netdev->features &= ~NETIF_F_TSO;
87ca4e5b 2635 netdev->features &= ~NETIF_F_TSO6;
7e6c9861
JK		 2636 break;
2637 case SPEED_1000:
2638 netdev->features |= NETIF_F_TSO;
87ca4e5b 2639 netdev->features |= NETIF_F_TSO6;
7e6c9861
JK		 2640 break;
2641 default:
2642 /* oops */
66a2b0a3
JK		 2643 break;
2644 }
2645 }
7e6c9861
JK		 2646
2647 /* enable transmits in the hardware, need to do this
2648 * after setting TARC0 */
2649 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2650 tctl |= E1000_TCTL_EN;
2651 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
66a2b0a3 2652
1da177e4
LT		 2653 netif_carrier_on(netdev);
2654 netif_wake_queue(netdev);
2655 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2656 adapter->smartspeed = 0;
bb8e3311
JG		 2657 } else {
2658 /* make sure the receive unit is started */
2659 if (adapter->hw.rx_needs_kicking) {
2660 struct e1000_hw *hw = &adapter->hw;
2661 uint32_t rctl = E1000_READ_REG(hw, RCTL);
2662 E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
2663 }
1da177e4
LT		 2664 }
2665 } else {
96838a40 2666 if (netif_carrier_ok(netdev)) {
1da177e4
LT		 2667 adapter->link_speed = 0;
2668 adapter->link_duplex = 0;
2669 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2670 netif_carrier_off(netdev);
2671 netif_stop_queue(netdev);
2672 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
87041639
JK		 2673
2674 /* 80003ES2LAN workaround--
2675 * For packet buffer work-around on link down event;
2676 * disable receives in the ISR and
2677 * reset device here in the watchdog
2678 */
8fc897b0 2679 if (adapter->hw.mac_type == e1000_80003es2lan)
87041639
JK		 2680 /* reset device */
2681 schedule_work(&adapter->reset_task);
1da177e4
LT		 2682 }
2683
2684 e1000_smartspeed(adapter);
2685 }
2686
2687 e1000_update_stats(adapter);
2688
2689 adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2690 adapter->tpt_old = adapter->stats.tpt;
2691 adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2692 adapter->colc_old = adapter->stats.colc;
2693
2694 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2695 adapter->gorcl_old = adapter->stats.gorcl;
2696 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2697 adapter->gotcl_old = adapter->stats.gotcl;
2698
2699 e1000_update_adaptive(&adapter->hw);
2700
f56799ea 2701 if (!netif_carrier_ok(netdev)) {
581d708e 2702 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
1da177e4
LT		 2703 /* We've lost link, so the controller stops DMA,
2704 * but we've got queued Tx work that's never going
2705 * to get done, so reset controller to flush Tx.
2706 * (Do the reset outside of interrupt context). */
87041639
JK		 2707 adapter->tx_timeout_count++;
2708 schedule_work(&adapter->reset_task);
1da177e4
LT		 2709 }
2710 }
2711
1da177e4
LT		 2712 /* Cause software interrupt to ensure rx ring is cleaned */
2713 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2714
2648345f 2715 /* Force detection of hung controller every watchdog period */
1da177e4
LT		 2716 adapter->detect_tx_hung = TRUE;
2717
96838a40 2718 /* With 82571 controllers, LAA may be overwritten due to controller
868d5309
MC		 2719 * reset from the other port. Set the appropriate LAA in RAR[0] */
2720 if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2721 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2722
1da177e4
LT		 2723 /* Reset the timer */
2724 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2725}
2726
835bb129
JB		 2727enum latency_range {
2728 lowest_latency = 0,
2729 low_latency = 1,
2730 bulk_latency = 2,
2731 latency_invalid = 255
2732};
2733
2734/**
2735 * e1000_update_itr - update the dynamic ITR value based on statistics
2736 * Stores a new ITR value based on packets and byte
2737 * counts during the last interrupt. The advantage of per interrupt
2738 * computation is faster updates and more accurate ITR for the current
2739 * traffic pattern. Constants in this function were computed
2740 * based on theoretical maximum wire speed and thresholds were set based
2741 * on testing data as well as attempting to minimize response time
2742 * while increasing bulk throughput.
2743 * this functionality is controlled by the InterruptThrottleRate module
2744 * parameter (see e1000_param.c)
2745 * @adapter: pointer to adapter
2746 * @itr_setting: current adapter->itr
2747 * @packets: the number of packets during this measurement interval
2748 * @bytes: the number of bytes during this measurement interval
2749 **/
2750static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2751 uint16_t itr_setting,
2752 int packets,
2753 int bytes)
2754{
2755 unsigned int retval = itr_setting;
2756 struct e1000_hw *hw = &adapter->hw;
2757
2758 if (unlikely(hw->mac_type < e1000_82540))
2759 goto update_itr_done;
2760
2761 if (packets == 0)
2762 goto update_itr_done;
2763
835bb129
JB		 2764 switch (itr_setting) {
2765 case lowest_latency:
2b65326e
JB		 2766 /* jumbo frames get bulk treatment*/
2767 if (bytes/packets > 8000)
2768 retval = bulk_latency;
2769 else if ((packets < 5) && (bytes > 512))
835bb129
JB		 2770 retval = low_latency;
2771 break;
2772 case low_latency: /* 50 usec aka 20000 ints/s */
2773 if (bytes > 10000) {
2b65326e
JB		 2774 /* jumbo frames need bulk latency setting */
2775 if (bytes/packets > 8000)
2776 retval = bulk_latency;
2777 else if ((packets < 10) || ((bytes/packets) > 1200))
835bb129
JB		 2778 retval = bulk_latency;
2779 else if ((packets > 35))
2780 retval = lowest_latency;
2b65326e
JB		 2781 } else if (bytes/packets > 2000)
2782 retval = bulk_latency;
2783 else if (packets <= 2 && bytes < 512)
835bb129
JB		 2784 retval = lowest_latency;
2785 break;
2786 case bulk_latency: /* 250 usec aka 4000 ints/s */
2787 if (bytes > 25000) {
2788 if (packets > 35)
2789 retval = low_latency;
2b65326e
JB		 2790 } else if (bytes < 6000) {
2791 retval = low_latency;
835bb129
JB		 2792 }
2793 break;
2794 }
2795
2796update_itr_done:
2797 return retval;
2798}
2799
2800static void e1000_set_itr(struct e1000_adapter *adapter)
2801{
2802 struct e1000_hw *hw = &adapter->hw;
2803 uint16_t current_itr;
2804 uint32_t new_itr = adapter->itr;
2805
2806 if (unlikely(hw->mac_type < e1000_82540))
2807 return;
2808
2809 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2810 if (unlikely(adapter->link_speed != SPEED_1000)) {
2811 current_itr = 0;
2812 new_itr = 4000;
2813 goto set_itr_now;
2814 }
2815
2816 adapter->tx_itr = e1000_update_itr(adapter,
2817 adapter->tx_itr,
2818 adapter->total_tx_packets,
2819 adapter->total_tx_bytes);
2b65326e
JB		 2820 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2821 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2822 adapter->tx_itr = low_latency;
2823
835bb129
JB		 2824 adapter->rx_itr = e1000_update_itr(adapter,
2825 adapter->rx_itr,
2826 adapter->total_rx_packets,
2827 adapter->total_rx_bytes);
2b65326e
JB		 2828 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2829 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2830 adapter->rx_itr = low_latency;
835bb129
JB		 2831
2832 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2833
835bb129
JB		 2834 switch (current_itr) {
2835 /* counts and packets in update_itr are dependent on these numbers */
2836 case lowest_latency:
2837 new_itr = 70000;
2838 break;
2839 case low_latency:
2840 new_itr = 20000; /* aka hwitr = ~200 */
2841 break;
2842 case bulk_latency:
2843 new_itr = 4000;
2844 break;
2845 default:
2846 break;
2847 }
2848
2849set_itr_now:
2850 if (new_itr != adapter->itr) {
2851 /* this attempts to bias the interrupt rate towards Bulk
2852 * by adding intermediate steps when interrupt rate is
2853 * increasing */
2854 new_itr = new_itr > adapter->itr ?
2855 min(adapter->itr + (new_itr >> 2), new_itr) :
2856 new_itr;
2857 adapter->itr = new_itr;
2858 E1000_WRITE_REG(hw, ITR, 1000000000 / (new_itr * 256));
2859 }
2860
2861 return;
2862}
2863
1da177e4
LT		 2864#define E1000_TX_FLAGS_CSUM 0x00000001
2865#define E1000_TX_FLAGS_VLAN 0x00000002
2866#define E1000_TX_FLAGS_TSO 0x00000004
2d7edb92 2867#define E1000_TX_FLAGS_IPV4 0x00000008
1da177e4
LT		 2868#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2869#define E1000_TX_FLAGS_VLAN_SHIFT 16
2870
e619d523 2871static int
581d708e
MC		 2872e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2873 struct sk_buff *skb)
1da177e4 2874{
1da177e4 2875 struct e1000_context_desc *context_desc;
545c67c0 2876 struct e1000_buffer *buffer_info;
1da177e4
LT		 2877 unsigned int i;
2878 uint32_t cmd_length = 0;
2d7edb92 2879 uint16_t ipcse = 0, tucse, mss;
1da177e4
LT		 2880 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2881 int err;
2882
89114afd 2883 if (skb_is_gso(skb)) {
1da177e4
LT		 2884 if (skb_header_cloned(skb)) {
2885 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2886 if (err)
2887 return err;
2888 }
2889
ab6a5bb6 2890 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
7967168c 2891 mss = skb_shinfo(skb)->gso_size;
60828236 2892 if (skb->protocol == htons(ETH_P_IP)) {
eddc9ec5
ACM		 2893 struct iphdr *iph = ip_hdr(skb);
2894 iph->tot_len = 0;
2895 iph->check = 0;
aa8223c7
ACM		 2896 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2897 iph->daddr, 0,
2898 IPPROTO_TCP,
2899 0);
2d7edb92 2900 cmd_length = E1000_TXD_CMD_IP;
ea2ae17d 2901 ipcse = skb_transport_offset(skb) - 1;
e15fdd03 2902 } else if (skb->protocol == htons(ETH_P_IPV6)) {
0660e03f 2903 ipv6_hdr(skb)->payload_len = 0;
aa8223c7 2904 tcp_hdr(skb)->check =
0660e03f
ACM		 2905 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2906 &ipv6_hdr(skb)->daddr,
2907 0, IPPROTO_TCP, 0);
2d7edb92 2908 ipcse = 0;
2d7edb92 2909 }
bbe735e4 2910 ipcss = skb_network_offset(skb);
eddc9ec5 2911 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
ea2ae17d 2912 tucss = skb_transport_offset(skb);
aa8223c7 2913 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1da177e4
LT		 2914 tucse = 0;
2915
2916 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2d7edb92 2917 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
1da177e4 2918
581d708e
MC		 2919 i = tx_ring->next_to_use;
2920 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
545c67c0 2921 buffer_info = &tx_ring->buffer_info[i];
1da177e4
LT		 2922
2923 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2924 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2925 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2926 context_desc->upper_setup.tcp_fields.tucss = tucss;
2927 context_desc->upper_setup.tcp_fields.tucso = tucso;
2928 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2929 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2930 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2931 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2932
545c67c0 2933 buffer_info->time_stamp = jiffies;
a9ebadd6 2934 buffer_info->next_to_watch = i;
545c67c0 2935
581d708e
MC		 2936 if (++i == tx_ring->count) i = 0;
2937 tx_ring->next_to_use = i;
1da177e4 2938
8241e35e 2939 return TRUE;
1da177e4 2940 }
8241e35e 2941 return FALSE;
1da177e4
LT		 2942}
2943
e619d523 2944static boolean_t
581d708e
MC		 2945e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2946 struct sk_buff *skb)
1da177e4
LT		 2947{
2948 struct e1000_context_desc *context_desc;
545c67c0 2949 struct e1000_buffer *buffer_info;
1da177e4
LT		 2950 unsigned int i;
2951 uint8_t css;
2952
84fa7933 2953 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
ea2ae17d 2954 css = skb_transport_offset(skb);
1da177e4 2955
581d708e 2956 i = tx_ring->next_to_use;
545c67c0 2957 buffer_info = &tx_ring->buffer_info[i];
581d708e 2958 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
1da177e4 2959
f6c57baf 2960 context_desc->lower_setup.ip_config = 0;
1da177e4 2961 context_desc->upper_setup.tcp_fields.tucss = css;
f6c57baf 2962 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
1da177e4
LT		 2963 context_desc->upper_setup.tcp_fields.tucse = 0;
2964 context_desc->tcp_seg_setup.data = 0;
2965 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2966
545c67c0 2967 buffer_info->time_stamp = jiffies;
a9ebadd6 2968 buffer_info->next_to_watch = i;
545c67c0 2969
581d708e
MC		 2970 if (unlikely(++i == tx_ring->count)) i = 0;
2971 tx_ring->next_to_use = i;
1da177e4
LT		 2972
2973 return TRUE;
2974 }
2975
2976 return FALSE;
2977}
2978
2979#define E1000_MAX_TXD_PWR 12
2980#define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2981
e619d523 2982static int
581d708e
MC		 2983e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2984 struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2985 unsigned int nr_frags, unsigned int mss)
1da177e4 2986{
1da177e4
LT		 2987 struct e1000_buffer *buffer_info;
2988 unsigned int len = skb->len;
2989 unsigned int offset = 0, size, count = 0, i;
2990 unsigned int f;
2991 len -= skb->data_len;
2992
2993 i = tx_ring->next_to_use;
2994
96838a40 2995 while (len) {
1da177e4
LT		 2996 buffer_info = &tx_ring->buffer_info[i];
2997 size = min(len, max_per_txd);
fd803241
JK		 2998 /* Workaround for Controller erratum --
2999 * descriptor for non-tso packet in a linear SKB that follows a
3000 * tso gets written back prematurely before the data is fully
0f15a8fa 3001 * DMA'd to the controller */
fd803241 3002 if (!skb->data_len && tx_ring->last_tx_tso &&
89114afd 3003 !skb_is_gso(skb)) {
fd803241
JK		 3004 tx_ring->last_tx_tso = 0;
3005 size -= 4;
3006 }
3007
1da177e4
LT		 3008 /* Workaround for premature desc write-backs
3009 * in TSO mode. Append 4-byte sentinel desc */
96838a40 3010 if (unlikely(mss && !nr_frags && size == len && size > 8))
1da177e4 3011 size -= 4;
97338bde
MC		 3012 /* work-around for errata 10 and it applies
3013 * to all controllers in PCI-X mode
3014 * The fix is to make sure that the first descriptor of a
3015 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3016 */
96838a40 3017 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
97338bde
MC		 3018 (size > 2015) && count == 0))
3019 size = 2015;
96838a40 3020
1da177e4
LT		 3021 /* Workaround for potential 82544 hang in PCI-X. Avoid
3022 * terminating buffers within evenly-aligned dwords. */
96838a40 3023 if (unlikely(adapter->pcix_82544 &&
1da177e4
LT		 3024 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3025 size > 4))
3026 size -= 4;
3027
3028 buffer_info->length = size;
3029 buffer_info->dma =
3030 pci_map_single(adapter->pdev,
3031 skb->data + offset,
3032 size,
3033 PCI_DMA_TODEVICE);
3034 buffer_info->time_stamp = jiffies;
a9ebadd6 3035 buffer_info->next_to_watch = i;
1da177e4
LT		 3036
3037 len -= size;
3038 offset += size;
3039 count++;
96838a40 3040 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4
LT		 3041 }
3042
96838a40 3043 for (f = 0; f < nr_frags; f++) {
1da177e4
LT		 3044 struct skb_frag_struct *frag;
3045
3046 frag = &skb_shinfo(skb)->frags[f];
3047 len = frag->size;
3048 offset = frag->page_offset;
3049
96838a40 3050 while (len) {
1da177e4
LT		 3051 buffer_info = &tx_ring->buffer_info[i];
3052 size = min(len, max_per_txd);
1da177e4
LT		 3053 /* Workaround for premature desc write-backs
3054 * in TSO mode. Append 4-byte sentinel desc */
96838a40 3055 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
1da177e4 3056 size -= 4;
1da177e4
LT		 3057 /* Workaround for potential 82544 hang in PCI-X.
3058 * Avoid terminating buffers within evenly-aligned
3059 * dwords. */
96838a40 3060 if (unlikely(adapter->pcix_82544 &&
1da177e4
LT		 3061 !((unsigned long)(frag->page+offset+size-1) & 4) &&
3062 size > 4))
3063 size -= 4;
3064
3065 buffer_info->length = size;
3066 buffer_info->dma =
3067 pci_map_page(adapter->pdev,
3068 frag->page,
3069 offset,
3070 size,
3071 PCI_DMA_TODEVICE);
3072 buffer_info->time_stamp = jiffies;
a9ebadd6 3073 buffer_info->next_to_watch = i;
1da177e4
LT		 3074
3075 len -= size;
3076 offset += size;
3077 count++;
96838a40 3078 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4
LT		 3079 }
3080 }
3081
3082 i = (i == 0) ? tx_ring->count - 1 : i - 1;
3083 tx_ring->buffer_info[i].skb = skb;
3084 tx_ring->buffer_info[first].next_to_watch = i;
3085
3086 return count;
3087}
3088
e619d523 3089static void
581d708e
MC		 3090e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3091 int tx_flags, int count)
1da177e4 3092{
1da177e4
LT		 3093 struct e1000_tx_desc *tx_desc = NULL;
3094 struct e1000_buffer *buffer_info;
3095 uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3096 unsigned int i;
3097
96838a40 3098 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
1da177e4
LT		 3099 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3100 E1000_TXD_CMD_TSE;
2d7edb92
MC		 3101 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3102
96838a40 3103 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2d7edb92 3104 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
1da177e4
LT		 3105 }
3106
96838a40 3107 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
1da177e4
LT		 3108 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3109 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3110 }
3111
96838a40 3112 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
1da177e4
LT		 3113 txd_lower |= E1000_TXD_CMD_VLE;
3114 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3115 }
3116
3117 i = tx_ring->next_to_use;
3118
96838a40 3119 while (count--) {
1da177e4
LT		 3120 buffer_info = &tx_ring->buffer_info[i];
3121 tx_desc = E1000_TX_DESC(*tx_ring, i);
3122 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3123 tx_desc->lower.data =
3124 cpu_to_le32(txd_lower | buffer_info->length);
3125 tx_desc->upper.data = cpu_to_le32(txd_upper);
96838a40 3126 if (unlikely(++i == tx_ring->count)) i = 0;
1da177e4
LT		 3127 }
3128
3129 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3130
3131 /* Force memory writes to complete before letting h/w
3132 * know there are new descriptors to fetch. (Only
3133 * applicable for weak-ordered memory model archs,
3134 * such as IA-64). */
3135 wmb();
3136
3137 tx_ring->next_to_use = i;
581d708e 3138 writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2ce9047f
JB		 3139 /* we need this if more than one processor can write to our tail
3140 * at a time, it syncronizes IO on IA64/Altix systems */
3141 mmiowb();
1da177e4
LT		 3142}
3143
3144/**
3145 * 82547 workaround to avoid controller hang in half-duplex environment.
3146 * The workaround is to avoid queuing a large packet that would span
3147 * the internal Tx FIFO ring boundary by notifying the stack to resend
3148 * the packet at a later time. This gives the Tx FIFO an opportunity to
3149 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3150 * to the beginning of the Tx FIFO.
3151 **/
3152
3153#define E1000_FIFO_HDR 0x10
3154#define E1000_82547_PAD_LEN 0x3E0
3155
e619d523 3156static int
1da177e4
LT		 3157e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3158{
3159 uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3160 uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3161
3162 E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
3163
96838a40 3164 if (adapter->link_duplex != HALF_DUPLEX)
1da177e4
LT		 3165 goto no_fifo_stall_required;
3166
96838a40 3167 if (atomic_read(&adapter->tx_fifo_stall))
1da177e4
LT		 3168 return 1;
3169
96838a40 3170 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
1da177e4
LT		 3171 atomic_set(&adapter->tx_fifo_stall, 1);
3172 return 1;
3173 }
3174
3175no_fifo_stall_required:
3176 adapter->tx_fifo_head += skb_fifo_len;
96838a40 3177 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
1da177e4
LT		 3178 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3179 return 0;
3180}
3181
2d7edb92 3182#define MINIMUM_DHCP_PACKET_SIZE 282
e619d523 3183static int
2d7edb92
MC		 3184e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3185{
3186 struct e1000_hw *hw = &adapter->hw;
3187 uint16_t length, offset;
96838a40
JB		 3188 if (vlan_tx_tag_present(skb)) {
3189 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2d7edb92
MC		 3190 ( adapter->hw.mng_cookie.status &
3191 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3192 return 0;
3193 }
20a44028 3194 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2d7edb92 3195 struct ethhdr *eth = (struct ethhdr *) skb->data;
96838a40
JB		 3196 if ((htons(ETH_P_IP) == eth->h_proto)) {
3197 const struct iphdr *ip =
2d7edb92 3198 (struct iphdr *)((uint8_t *)skb->data+14);
96838a40
JB		 3199 if (IPPROTO_UDP == ip->protocol) {
3200 struct udphdr *udp =
3201 (struct udphdr *)((uint8_t *)ip +
2d7edb92 3202 (ip->ihl << 2));
96838a40 3203 if (ntohs(udp->dest) == 67) {
2d7edb92
MC		 3204 offset = (uint8_t *)udp + 8 - skb->data;
3205 length = skb->len - offset;
3206
3207 return e1000_mng_write_dhcp_info(hw,
96838a40 3208 (uint8_t *)udp + 8,
2d7edb92
MC		 3209 length);
3210 }
3211 }
3212 }
3213 }
3214 return 0;
3215}
3216
65c7973f
JB		 3217static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3218{
3219 struct e1000_adapter *adapter = netdev_priv(netdev);
3220 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3221
3222 netif_stop_queue(netdev);
3223 /* Herbert's original patch had:
3224 * smp_mb__after_netif_stop_queue();
3225 * but since that doesn't exist yet, just open code it. */
3226 smp_mb();
3227
3228 /* We need to check again in a case another CPU has just
3229 * made room available. */
3230 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3231 return -EBUSY;
3232
3233 /* A reprieve! */
3234 netif_start_queue(netdev);
fcfb1224 3235 ++adapter->restart_queue;
65c7973f
JB		 3236 return 0;
3237}
3238
3239static int e1000_maybe_stop_tx(struct net_device *netdev,
3240 struct e1000_tx_ring *tx_ring, int size)
3241{
3242 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3243 return 0;
3244 return __e1000_maybe_stop_tx(netdev, size);
3245}
3246
1da177e4
LT		 3247#define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3248static int
3249e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3250{
60490fe0 3251 struct e1000_adapter *adapter = netdev_priv(netdev);
581d708e 3252 struct e1000_tx_ring *tx_ring;
1da177e4
LT		 3253 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3254 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3255 unsigned int tx_flags = 0;
3256 unsigned int len = skb->len;
3257 unsigned long flags;
3258 unsigned int nr_frags = 0;
3259 unsigned int mss = 0;
3260 int count = 0;
76c224bc 3261 int tso;
1da177e4
LT		 3262 unsigned int f;
3263 len -= skb->data_len;
3264
65c7973f
JB		 3265 /* This goes back to the question of how to logically map a tx queue
3266 * to a flow. Right now, performance is impacted slightly negatively
3267 * if using multiple tx queues. If the stack breaks away from a
3268 * single qdisc implementation, we can look at this again. */
581d708e 3269 tx_ring = adapter->tx_ring;
24025e4e 3270
581d708e 3271 if (unlikely(skb->len <= 0)) {
1da177e4
LT		 3272 dev_kfree_skb_any(skb);
3273 return NETDEV_TX_OK;
3274 }
3275
032fe6e9
JB		 3276 /* 82571 and newer doesn't need the workaround that limited descriptor
3277 * length to 4kB */
3278 if (adapter->hw.mac_type >= e1000_82571)
3279 max_per_txd = 8192;
3280
7967168c 3281 mss = skb_shinfo(skb)->gso_size;
76c224bc 3282 /* The controller does a simple calculation to
1da177e4
LT		 3283 * make sure there is enough room in the FIFO before
3284 * initiating the DMA for each buffer. The calc is:
3285 * 4 = ceil(buffer len/mss). To make sure we don't
3286 * overrun the FIFO, adjust the max buffer len if mss
3287 * drops. */
96838a40 3288 if (mss) {
9a3056da 3289 uint8_t hdr_len;
1da177e4
LT		 3290 max_per_txd = min(mss << 2, max_per_txd);
3291 max_txd_pwr = fls(max_per_txd) - 1;
9a3056da 3292
90fb5135
AK		 3293 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3294 * points to just header, pull a few bytes of payload from
3295 * frags into skb->data */
ab6a5bb6 3296 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
9f687888
JK		 3297 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
3298 switch (adapter->hw.mac_type) {
3299 unsigned int pull_size;
683a2aa3
HX		 3300 case e1000_82544:
3301 /* Make sure we have room to chop off 4 bytes,
3302 * and that the end alignment will work out to
3303 * this hardware's requirements
3304 * NOTE: this is a TSO only workaround
3305 * if end byte alignment not correct move us
3306 * into the next dword */
27a884dc 3307 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
683a2aa3
HX		 3308 break;
3309 /* fall through */
9f687888
JK		 3310 case e1000_82571:
3311 case e1000_82572:
3312 case e1000_82573:
cd94dd0b 3313 case e1000_ich8lan:
9f687888
JK		 3314 pull_size = min((unsigned int)4, skb->data_len);
3315 if (!__pskb_pull_tail(skb, pull_size)) {
a5eafce2 3316 DPRINTK(DRV, ERR,
9f687888
JK		 3317 "__pskb_pull_tail failed.\n");
3318 dev_kfree_skb_any(skb);
749dfc70 3319 return NETDEV_TX_OK;
9f687888
JK		 3320 }
3321 len = skb->len - skb->data_len;
3322 break;
3323 default:
3324 /* do nothing */
3325 break;
d74bbd3b 3326 }
9a3056da 3327 }
1da177e4
LT		 3328 }
3329
9a3056da 3330 /* reserve a descriptor for the offload context */
84fa7933 3331 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
1da177e4 3332 count++;
2648345f 3333 count++;
fd803241 3334
fd803241 3335 /* Controller Erratum workaround */
89114afd 3336 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
fd803241 3337 count++;
fd803241 3338
1da177e4
LT		 3339 count += TXD_USE_COUNT(len, max_txd_pwr);
3340
96838a40 3341 if (adapter->pcix_82544)
1da177e4
LT		 3342 count++;
3343
96838a40 3344 /* work-around for errata 10 and it applies to all controllers
97338bde
MC		 3345 * in PCI-X mode, so add one more descriptor to the count
3346 */
96838a40 3347 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
97338bde
MC		 3348 (len > 2015)))
3349 count++;
3350
1da177e4 3351 nr_frags = skb_shinfo(skb)->nr_frags;
96838a40 3352 for (f = 0; f < nr_frags; f++)
1da177e4
LT		 3353 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3354 max_txd_pwr);
96838a40 3355 if (adapter->pcix_82544)
1da177e4
LT		 3356 count += nr_frags;
3357
0f15a8fa
JK		 3358
3359 if (adapter->hw.tx_pkt_filtering &&
3360 (adapter->hw.mac_type == e1000_82573))
2d7edb92
MC		 3361 e1000_transfer_dhcp_info(adapter, skb);
3362
581d708e
MC		 3363 local_irq_save(flags);
3364 if (!spin_trylock(&tx_ring->tx_lock)) {
3365 /* Collision - tell upper layer to requeue */
3366 local_irq_restore(flags);
3367 return NETDEV_TX_LOCKED;
3368 }
1da177e4
LT		 3369
3370 /* need: count + 2 desc gap to keep tail from touching
3371 * head, otherwise try next time */
65c7973f 3372 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
581d708e 3373 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 3374 return NETDEV_TX_BUSY;
3375 }
3376
96838a40
JB		 3377 if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3378 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
1da177e4 3379 netif_stop_queue(netdev);
1314bbf3 3380 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
581d708e 3381 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 3382 return NETDEV_TX_BUSY;
3383 }
3384 }
3385
96838a40 3386 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
1da177e4
LT		 3387 tx_flags |= E1000_TX_FLAGS_VLAN;
3388 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3389 }
3390
581d708e 3391 first = tx_ring->next_to_use;
96838a40 3392
581d708e 3393 tso = e1000_tso(adapter, tx_ring, skb);
1da177e4
LT		 3394 if (tso < 0) {
3395 dev_kfree_skb_any(skb);
581d708e 3396 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 3397 return NETDEV_TX_OK;
3398 }
3399
fd803241
JK		 3400 if (likely(tso)) {
3401 tx_ring->last_tx_tso = 1;
1da177e4 3402 tx_flags |= E1000_TX_FLAGS_TSO;
fd803241 3403 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
1da177e4
LT		 3404 tx_flags |= E1000_TX_FLAGS_CSUM;
3405
2d7edb92 3406 /* Old method was to assume IPv4 packet by default if TSO was enabled.
868d5309 3407 * 82571 hardware supports TSO capabilities for IPv6 as well...
2d7edb92 3408 * no longer assume, we must. */
60828236 3409 if (likely(skb->protocol == htons(ETH_P_IP)))
2d7edb92
MC		 3410 tx_flags |= E1000_TX_FLAGS_IPV4;
3411
581d708e
MC		 3412 e1000_tx_queue(adapter, tx_ring, tx_flags,
3413 e1000_tx_map(adapter, tx_ring, skb, first,
3414 max_per_txd, nr_frags, mss));
1da177e4
LT		 3415
3416 netdev->trans_start = jiffies;
3417
3418 /* Make sure there is space in the ring for the next send. */
65c7973f 3419 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
1da177e4 3420
581d708e 3421 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1da177e4
LT		 3422 return NETDEV_TX_OK;
3423}
3424
3425/**
3426 * e1000_tx_timeout - Respond to a Tx Hang
3427 * @netdev: network interface device structure
3428 **/
3429
3430static void
3431e1000_tx_timeout(struct net_device *netdev)
3432{
60490fe0 3433 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 3434
3435 /* Do the reset outside of interrupt context */
87041639
JK		 3436 adapter->tx_timeout_count++;
3437 schedule_work(&adapter->reset_task);
1da177e4
LT		 3438}
3439
3440static void
65f27f38 3441e1000_reset_task(struct work_struct *work)
1da177e4 3442{
65f27f38
DH		 3443 struct e1000_adapter *adapter =
3444 container_of(work, struct e1000_adapter, reset_task);
1da177e4 3445
2db10a08 3446 e1000_reinit_locked(adapter);
1da177e4
LT		 3447}
3448
3449/**
3450 * e1000_get_stats - Get System Network Statistics
3451 * @netdev: network interface device structure
3452 *
3453 * Returns the address of the device statistics structure.
3454 * The statistics are actually updated from the timer callback.
3455 **/
3456
3457static struct net_device_stats *
3458e1000_get_stats(struct net_device *netdev)
3459{
60490fe0 3460 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 3461
6b7660cd 3462 /* only return the current stats */
1da177e4
LT		 3463 return &adapter->net_stats;
3464}
3465
3466/**
3467 * e1000_change_mtu - Change the Maximum Transfer Unit
3468 * @netdev: network interface device structure
3469 * @new_mtu: new value for maximum frame size
3470 *
3471 * Returns 0 on success, negative on failure
3472 **/
3473
3474static int
3475e1000_change_mtu(struct net_device *netdev, int new_mtu)
3476{
60490fe0 3477 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 3478 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
85b22eb6 3479 uint16_t eeprom_data = 0;
1da177e4 3480
96838a40
JB		 3481 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3482 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3483 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
1da177e4 3484 return -EINVAL;
2d7edb92 3485 }
1da177e4 3486
997f5cbd
JK		 3487 /* Adapter-specific max frame size limits. */
3488 switch (adapter->hw.mac_type) {
9e2feace 3489 case e1000_undefined ... e1000_82542_rev2_1:
cd94dd0b 3490 case e1000_ich8lan:
997f5cbd
JK		 3491 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3492 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
2d7edb92 3493 return -EINVAL;
2d7edb92 3494 }
997f5cbd 3495 break;
85b22eb6 3496 case e1000_82573:
249d71d6
BA		 3497 /* Jumbo Frames not supported if:
3498 * - this is not an 82573L device
3499 * - ASPM is enabled in any way (0x1A bits 3:2) */
85b22eb6
JK		 3500 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3501 &eeprom_data);
249d71d6
BA		 3502 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3503 (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
85b22eb6
JK		 3504 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3505 DPRINTK(PROBE, ERR,
3506 "Jumbo Frames not supported.\n");
3507 return -EINVAL;
3508 }
3509 break;
3510 }
249d71d6
BA		 3511 /* ERT will be enabled later to enable wire speed receives */
3512
85b22eb6 3513 /* fall through to get support */
997f5cbd
JK		 3514 case e1000_82571:
3515 case e1000_82572:
87041639 3516 case e1000_80003es2lan:
997f5cbd
JK		 3517#define MAX_STD_JUMBO_FRAME_SIZE 9234
3518 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3519 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3520 return -EINVAL;
3521 }
3522 break;
3523 default:
3524 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3525 break;
1da177e4
LT		 3526 }
3527
87f5032e 3528 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
9e2feace
AK		 3529 * means we reserve 2 more, this pushes us to allocate from the next
3530 * larger slab size
3531 * i.e. RXBUFFER_2048 --> size-4096 slab */
3532
3533 if (max_frame <= E1000_RXBUFFER_256)
3534 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3535 else if (max_frame <= E1000_RXBUFFER_512)
3536 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3537 else if (max_frame <= E1000_RXBUFFER_1024)
3538 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3539 else if (max_frame <= E1000_RXBUFFER_2048)
3540 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3541 else if (max_frame <= E1000_RXBUFFER_4096)
3542 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3543 else if (max_frame <= E1000_RXBUFFER_8192)
3544 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3545 else if (max_frame <= E1000_RXBUFFER_16384)
3546 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3547
3548 /* adjust allocation if LPE protects us, and we aren't using SBP */
9e2feace
AK		 3549 if (!adapter->hw.tbi_compatibility_on &&
3550 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3551 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3552 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
997f5cbd 3553
2d7edb92 3554 netdev->mtu = new_mtu;
83cd8279 3555 adapter->hw.max_frame_size = max_frame;
2d7edb92 3556
2db10a08
AK		 3557 if (netif_running(netdev))
3558 e1000_reinit_locked(adapter);
1da177e4 3559
1da177e4
LT		 3560 return 0;
3561}
3562
3563/**
3564 * e1000_update_stats - Update the board statistics counters
3565 * @adapter: board private structure
3566 **/
3567
3568void
3569e1000_update_stats(struct e1000_adapter *adapter)
3570{
3571 struct e1000_hw *hw = &adapter->hw;
282f33c9 3572 struct pci_dev *pdev = adapter->pdev;
1da177e4
LT		 3573 unsigned long flags;
3574 uint16_t phy_tmp;
3575
3576#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3577
282f33c9
LV		 3578 /*
3579 * Prevent stats update while adapter is being reset, or if the pci
3580 * connection is down.
3581 */
9026729b 3582 if (adapter->link_speed == 0)
282f33c9 3583 return;
81b1955e 3584 if (pci_channel_offline(pdev))
9026729b
AK		 3585 return;
3586
1da177e4
LT		 3587 spin_lock_irqsave(&adapter->stats_lock, flags);
3588
3589 /* these counters are modified from e1000_adjust_tbi_stats,
3590 * called from the interrupt context, so they must only
3591 * be written while holding adapter->stats_lock
3592 */
3593
3594 adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3595 adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3596 adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3597 adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3598 adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3599 adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3600 adapter->stats.roc += E1000_READ_REG(hw, ROC);
cd94dd0b
AK		 3601
3602 if (adapter->hw.mac_type != e1000_ich8lan) {
90fb5135
AK		 3603 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3604 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3605 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3606 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3607 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3608 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
cd94dd0b 3609 }
1da177e4
LT		 3610
3611 adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3612 adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3613 adapter->stats.scc += E1000_READ_REG(hw, SCC);
3614 adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3615 adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3616 adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3617 adapter->stats.dc += E1000_READ_REG(hw, DC);
3618 adapter->stats.sec += E1000_READ_REG(hw, SEC);
3619 adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3620 adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3621 adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3622 adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3623 adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3624 adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3625 adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3626 adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3627 adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3628 adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3629 adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3630 adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3631 adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3632 adapter->stats.torl += E1000_READ_REG(hw, TORL);
3633 adapter->stats.torh += E1000_READ_REG(hw, TORH);
3634 adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3635 adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3636 adapter->stats.tpr += E1000_READ_REG(hw, TPR);
cd94dd0b
AK		 3637
3638 if (adapter->hw.mac_type != e1000_ich8lan) {
90fb5135
AK		 3639 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3640 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3641 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3642 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3643 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3644 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
cd94dd0b
AK		 3645 }
3646
1da177e4
LT		 3647 adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3648 adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3649
3650 /* used for adaptive IFS */
3651
3652 hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3653 adapter->stats.tpt += hw->tx_packet_delta;
3654 hw->collision_delta = E1000_READ_REG(hw, COLC);
3655 adapter->stats.colc += hw->collision_delta;
3656
96838a40 3657 if (hw->mac_type >= e1000_82543) {
1da177e4
LT		 3658 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3659 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3660 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3661 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3662 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3663 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3664 }
96838a40 3665 if (hw->mac_type > e1000_82547_rev_2) {
2d7edb92
MC		 3666 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3667 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
cd94dd0b
AK		 3668
3669 if (adapter->hw.mac_type != e1000_ich8lan) {
90fb5135
AK		 3670 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3671 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3672 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3673 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3674 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3675 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3676 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
cd94dd0b 3677 }
2d7edb92 3678 }
1da177e4
LT		 3679
3680 /* Fill out the OS statistics structure */
1da177e4
LT		 3681 adapter->net_stats.rx_packets = adapter->stats.gprc;
3682 adapter->net_stats.tx_packets = adapter->stats.gptc;
3683 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3684 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3685 adapter->net_stats.multicast = adapter->stats.mprc;
3686 adapter->net_stats.collisions = adapter->stats.colc;
3687
3688 /* Rx Errors */
3689
87041639
JK		 3690 /* RLEC on some newer hardware can be incorrect so build
3691 * our own version based on RUC and ROC */
1da177e4
LT		 3692 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3693 adapter->stats.crcerrs + adapter->stats.algnerrc +
87041639
JK		 3694 adapter->stats.ruc + adapter->stats.roc +
3695 adapter->stats.cexterr;
49559854
MW		 3696 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3697 adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
1da177e4
LT		 3698 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3699 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
1da177e4
LT		 3700 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3701
3702 /* Tx Errors */
49559854
MW		 3703 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3704 adapter->net_stats.tx_errors = adapter->stats.txerrc;
1da177e4
LT		 3705 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3706 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3707 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
167fb284
JG		 3708 if (adapter->hw.bad_tx_carr_stats_fd &&
3709 adapter->link_duplex == FULL_DUPLEX) {
3710 adapter->net_stats.tx_carrier_errors = 0;
3711 adapter->stats.tncrs = 0;
3712 }
1da177e4
LT		 3713
3714 /* Tx Dropped needs to be maintained elsewhere */
3715
3716 /* Phy Stats */
96838a40
JB		 3717 if (hw->media_type == e1000_media_type_copper) {
3718 if ((adapter->link_speed == SPEED_1000) &&
1da177e4
LT		 3719 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3720 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3721 adapter->phy_stats.idle_errors += phy_tmp;
3722 }
3723
96838a40 3724 if ((hw->mac_type <= e1000_82546) &&
1da177e4
LT		 3725 (hw->phy_type == e1000_phy_m88) &&
3726 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3727 adapter->phy_stats.receive_errors += phy_tmp;
3728 }
3729
15e376b4
JG		 3730 /* Management Stats */
3731 if (adapter->hw.has_smbus) {
3732 adapter->stats.mgptc += E1000_READ_REG(hw, MGTPTC);
3733 adapter->stats.mgprc += E1000_READ_REG(hw, MGTPRC);
3734 adapter->stats.mgpdc += E1000_READ_REG(hw, MGTPDC);
3735 }
3736
1da177e4
LT		 3737 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3738}
9ac98284
JB		 3739#ifdef CONFIG_PCI_MSI
3740
3741/**
3742 * e1000_intr_msi - Interrupt Handler
3743 * @irq: interrupt number
3744 * @data: pointer to a network interface device structure
3745 **/
3746
b5fc8f0c
JB		 3747static irqreturn_t
3748e1000_intr_msi(int irq, void *data)
9ac98284
JB		 3749{
3750 struct net_device *netdev = data;
3751 struct e1000_adapter *adapter = netdev_priv(netdev);
3752 struct e1000_hw *hw = &adapter->hw;
3753#ifndef CONFIG_E1000_NAPI
3754 int i;
3755#endif
b5fc8f0c 3756 uint32_t icr = E1000_READ_REG(hw, ICR);
9ac98284 3757
9ac98284 3758#ifdef CONFIG_E1000_NAPI
b5fc8f0c
JB		 3759 /* read ICR disables interrupts using IAM, so keep up with our
3760 * enable/disable accounting */
3761 atomic_inc(&adapter->irq_sem);
9ac98284 3762#endif
b5fc8f0c
JB		 3763 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3764 hw->get_link_status = 1;
3765 /* 80003ES2LAN workaround-- For packet buffer work-around on
3766 * link down event; disable receives here in the ISR and reset
3767 * adapter in watchdog */
3768 if (netif_carrier_ok(netdev) &&
3769 (adapter->hw.mac_type == e1000_80003es2lan)) {
3770 /* disable receives */
3771 uint32_t rctl = E1000_READ_REG(hw, RCTL);
3772 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
9ac98284 3773 }
b5fc8f0c
JB		 3774 /* guard against interrupt when we're going down */
3775 if (!test_bit(__E1000_DOWN, &adapter->flags))
3776 mod_timer(&adapter->watchdog_timer, jiffies + 1);
9ac98284
JB		 3777 }
3778
3779#ifdef CONFIG_E1000_NAPI
835bb129
JB		 3780 if (likely(netif_rx_schedule_prep(netdev))) {
3781 adapter->total_tx_bytes = 0;
3782 adapter->total_tx_packets = 0;
3783 adapter->total_rx_bytes = 0;
3784 adapter->total_rx_packets = 0;
9ac98284 3785 __netif_rx_schedule(netdev);
835bb129 3786 } else
9ac98284
JB		 3787 e1000_irq_enable(adapter);
3788#else
835bb129
JB		 3789 adapter->total_tx_bytes = 0;
3790 adapter->total_rx_bytes = 0;
3791 adapter->total_tx_packets = 0;
3792 adapter->total_rx_packets = 0;
3793
9ac98284
JB		 3794 for (i = 0; i < E1000_MAX_INTR; i++)
3795 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
46fcc86d 3796 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
9ac98284 3797 break;
835bb129
JB		 3798
3799 if (likely(adapter->itr_setting & 3))
3800 e1000_set_itr(adapter);
9ac98284
JB		 3801#endif
3802
3803 return IRQ_HANDLED;
3804}
3805#endif
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);
a292ca6e
JK		 4227 memcpy(new_skb->data - NET_IP_ALIGN,
4228 skb->data - NET_IP_ALIGN,
4229 length + NET_IP_ALIGN);
4230 /* save the skb in buffer_info as good */
4231 buffer_info->skb = skb;
4232 skb = new_skb;
a292ca6e 4233 }
996695de
AK		 4234 /* else just continue with the old one */
4235 }
a292ca6e 4236 /* end copybreak code */
996695de 4237 skb_put(skb, length);
1da177e4
LT		 4238
4239 /* Receive Checksum Offload */
a292ca6e
JK		 4240 e1000_rx_checksum(adapter,
4241 (uint32_t)(status) |
2d7edb92 4242 ((uint32_t)(rx_desc->errors) << 24),
c3d7a3a4 4243 le16_to_cpu(rx_desc->csum), skb);
96838a40 4244
1da177e4
LT		 4245 skb->protocol = eth_type_trans(skb, netdev);
4246#ifdef CONFIG_E1000_NAPI
96838a40 4247 if (unlikely(adapter->vlgrp &&
a292ca6e 4248 (status & E1000_RXD_STAT_VP))) {
1da177e4 4249 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2d7edb92
MC		 4250 le16_to_cpu(rx_desc->special) &
4251 E1000_RXD_SPC_VLAN_MASK);
1da177e4
LT		 4252 } else {
4253 netif_receive_skb(skb);
4254 }
4255#else /* CONFIG_E1000_NAPI */
96838a40 4256 if (unlikely(adapter->vlgrp &&
b92ff8ee 4257 (status & E1000_RXD_STAT_VP))) {
1da177e4
LT		 4258 vlan_hwaccel_rx(skb, adapter->vlgrp,
4259 le16_to_cpu(rx_desc->special) &
4260 E1000_RXD_SPC_VLAN_MASK);
4261 } else {
4262 netif_rx(skb);
4263 }
4264#endif /* CONFIG_E1000_NAPI */
4265 netdev->last_rx = jiffies;
4266
4267next_desc:
4268 rx_desc->status = 0;
1da177e4 4269
72d64a43
JK		 4270 /* return some buffers to hardware, one at a time is too slow */
4271 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4272 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4273 cleaned_count = 0;
4274 }
4275
30320be8 4276 /* use prefetched values */
86c3d59f
JB		 4277 rx_desc = next_rxd;
4278 buffer_info = next_buffer;
1da177e4 4279 }
1da177e4 4280 rx_ring->next_to_clean = i;
72d64a43
JK		 4281
4282 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4283 if (cleaned_count)
4284 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
2d7edb92 4285
835bb129
JB		 4286 adapter->total_rx_packets += total_rx_packets;
4287 adapter->total_rx_bytes += total_rx_bytes;
2d7edb92
MC		 4288 return cleaned;
4289}
4290
4291/**
4292 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4293 * @adapter: board private structure
4294 **/
4295
4296static boolean_t
4297#ifdef CONFIG_E1000_NAPI
581d708e
MC		 4298e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4299 struct e1000_rx_ring *rx_ring,
4300 int *work_done, int work_to_do)
2d7edb92 4301#else
581d708e
MC		 4302e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4303 struct e1000_rx_ring *rx_ring)
2d7edb92
MC		 4304#endif
4305{
86c3d59f 4306 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
2d7edb92
MC		 4307 struct net_device *netdev = adapter->netdev;
4308 struct pci_dev *pdev = adapter->pdev;
86c3d59f 4309 struct e1000_buffer *buffer_info, *next_buffer;
2d7edb92
MC		 4310 struct e1000_ps_page *ps_page;
4311 struct e1000_ps_page_dma *ps_page_dma;
24f476ee 4312 struct sk_buff *skb;
2d7edb92
MC		 4313 unsigned int i, j;
4314 uint32_t length, staterr;
72d64a43 4315 int cleaned_count = 0;
2d7edb92 4316 boolean_t cleaned = FALSE;
835bb129 4317 unsigned int total_rx_bytes=0, total_rx_packets=0;
2d7edb92
MC		 4318
4319 i = rx_ring->next_to_clean;
4320 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
683a38f3 4321 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
9e2feace 4322 buffer_info = &rx_ring->buffer_info[i];
2d7edb92 4323
96838a40 4324 while (staterr & E1000_RXD_STAT_DD) {
2d7edb92
MC		 4325 ps_page = &rx_ring->ps_page[i];
4326 ps_page_dma = &rx_ring->ps_page_dma[i];
4327#ifdef CONFIG_E1000_NAPI
96838a40 4328 if (unlikely(*work_done >= work_to_do))
2d7edb92
MC		 4329 break;
4330 (*work_done)++;
4331#endif
86c3d59f
JB		 4332 skb = buffer_info->skb;
4333
30320be8
JK		 4334 /* in the packet split case this is header only */
4335 prefetch(skb->data - NET_IP_ALIGN);
4336
86c3d59f
JB		 4337 if (++i == rx_ring->count) i = 0;
4338 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
30320be8
JK		 4339 prefetch(next_rxd);
4340
86c3d59f 4341 next_buffer = &rx_ring->buffer_info[i];
86c3d59f 4342
2d7edb92 4343 cleaned = TRUE;
72d64a43 4344 cleaned_count++;
2d7edb92
MC		 4345 pci_unmap_single(pdev, buffer_info->dma,
4346 buffer_info->length,
4347 PCI_DMA_FROMDEVICE);
4348
96838a40 4349 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
2d7edb92
MC		 4350 E1000_DBG("%s: Packet Split buffers didn't pick up"
4351 " the full packet\n", netdev->name);
4352 dev_kfree_skb_irq(skb);
4353 goto next_desc;
4354 }
1da177e4 4355
96838a40 4356 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
2d7edb92
MC		 4357 dev_kfree_skb_irq(skb);
4358 goto next_desc;
4359 }
4360
4361 length = le16_to_cpu(rx_desc->wb.middle.length0);
4362
96838a40 4363 if (unlikely(!length)) {
2d7edb92
MC		 4364 E1000_DBG("%s: Last part of the packet spanning"
4365 " multiple descriptors\n", netdev->name);
4366 dev_kfree_skb_irq(skb);
4367 goto next_desc;
4368 }
4369
4370 /* Good Receive */
4371 skb_put(skb, length);
4372
dc7c6add
JK		 4373 {
4374 /* this looks ugly, but it seems compiler issues make it
4375 more efficient than reusing j */
4376 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4377
4378 /* page alloc/put takes too long and effects small packet
4379 * throughput, so unsplit small packets and save the alloc/put*/
1f753861 4380 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
dc7c6add 4381 u8 *vaddr;
76c224bc 4382 /* there is no documentation about how to call
dc7c6add
JK		 4383 * kmap_atomic, so we can't hold the mapping
4384 * very long */
4385 pci_dma_sync_single_for_cpu(pdev,
4386 ps_page_dma->ps_page_dma[0],
4387 PAGE_SIZE,
4388 PCI_DMA_FROMDEVICE);
4389 vaddr = kmap_atomic(ps_page->ps_page[0],
4390 KM_SKB_DATA_SOFTIRQ);
27a884dc 4391 memcpy(skb_tail_pointer(skb), vaddr, l1);
dc7c6add
JK		 4392 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4393 pci_dma_sync_single_for_device(pdev,
4394 ps_page_dma->ps_page_dma[0],
4395 PAGE_SIZE, PCI_DMA_FROMDEVICE);
f235a2ab
AK		 4396 /* remove the CRC */
4397 l1 -= 4;
dc7c6add 4398 skb_put(skb, l1);
dc7c6add
JK		 4399 goto copydone;
4400 } /* if */
4401 }
90fb5135 4402
96838a40 4403 for (j = 0; j < adapter->rx_ps_pages; j++) {
30320be8 4404 if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
2d7edb92 4405 break;
2d7edb92
MC		 4406 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4407 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4408 ps_page_dma->ps_page_dma[j] = 0;
329bfd0b
JK		 4409 skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4410 length);
2d7edb92 4411 ps_page->ps_page[j] = NULL;
2d7edb92
MC		 4412 skb->len += length;
4413 skb->data_len += length;
5d51b80f 4414 skb->truesize += length;
2d7edb92
MC		 4415 }
4416
f235a2ab
AK		 4417 /* strip the ethernet crc, problem is we're using pages now so
4418 * this whole operation can get a little cpu intensive */
4419 pskb_trim(skb, skb->len - 4);
4420
dc7c6add 4421copydone:
835bb129
JB		 4422 total_rx_bytes += skb->len;
4423 total_rx_packets++;
4424
2d7edb92 4425 e1000_rx_checksum(adapter, staterr,
c3d7a3a4 4426 le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
2d7edb92
MC		 4427 skb->protocol = eth_type_trans(skb, netdev);
4428
96838a40 4429 if (likely(rx_desc->wb.upper.header_status &
c3d7a3a4 4430 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
e4c811c9 4431 adapter->rx_hdr_split++;
2d7edb92 4432#ifdef CONFIG_E1000_NAPI
96838a40 4433 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
2d7edb92 4434 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
683a38f3
MC		 4435 le16_to_cpu(rx_desc->wb.middle.vlan) &
4436 E1000_RXD_SPC_VLAN_MASK);
2d7edb92
MC		 4437 } else {
4438 netif_receive_skb(skb);
4439 }
4440#else /* CONFIG_E1000_NAPI */
96838a40 4441 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
2d7edb92 4442 vlan_hwaccel_rx(skb, adapter->vlgrp,
683a38f3
MC		 4443 le16_to_cpu(rx_desc->wb.middle.vlan) &
4444 E1000_RXD_SPC_VLAN_MASK);
2d7edb92
MC		 4445 } else {
4446 netif_rx(skb);
4447 }
4448#endif /* CONFIG_E1000_NAPI */
4449 netdev->last_rx = jiffies;
4450
4451next_desc:
c3d7a3a4 4452 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
2d7edb92 4453 buffer_info->skb = NULL;
2d7edb92 4454
72d64a43
JK		 4455 /* return some buffers to hardware, one at a time is too slow */
4456 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4457 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4458 cleaned_count = 0;
4459 }
4460
30320be8 4461 /* use prefetched values */
86c3d59f
JB		 4462 rx_desc = next_rxd;
4463 buffer_info = next_buffer;
4464
683a38f3 4465 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
2d7edb92
MC		 4466 }
4467 rx_ring->next_to_clean = i;
72d64a43
JK		 4468
4469 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4470 if (cleaned_count)
4471 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
1da177e4 4472
835bb129
JB		 4473 adapter->total_rx_packets += total_rx_packets;
4474 adapter->total_rx_bytes += total_rx_bytes;
1da177e4
LT		 4475 return cleaned;
4476}
4477
4478/**
2d7edb92 4479 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
1da177e4
LT		 4480 * @adapter: address of board private structure
4481 **/
4482
4483static void
581d708e 4484e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
72d64a43 4485 struct e1000_rx_ring *rx_ring,
a292ca6e 4486 int cleaned_count)
1da177e4 4487{
1da177e4
LT		 4488 struct net_device *netdev = adapter->netdev;
4489 struct pci_dev *pdev = adapter->pdev;
4490 struct e1000_rx_desc *rx_desc;
4491 struct e1000_buffer *buffer_info;
4492 struct sk_buff *skb;
2648345f
MC		 4493 unsigned int i;
4494 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
1da177e4
LT		 4495
4496 i = rx_ring->next_to_use;
4497 buffer_info = &rx_ring->buffer_info[i];
4498
a292ca6e 4499 while (cleaned_count--) {
ca6f7224
CH		 4500 skb = buffer_info->skb;
4501 if (skb) {
a292ca6e
JK		 4502 skb_trim(skb, 0);
4503 goto map_skb;
4504 }
4505
ca6f7224 4506 skb = netdev_alloc_skb(netdev, bufsz);
96838a40 4507 if (unlikely(!skb)) {
1da177e4 4508 /* Better luck next round */
72d64a43 4509 adapter->alloc_rx_buff_failed++;
1da177e4
LT		 4510 break;
4511 }
4512
2648345f 4513 /* Fix for errata 23, can't cross 64kB boundary */
1da177e4
LT		 4514 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4515 struct sk_buff *oldskb = skb;
2648345f
MC		 4516 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4517 "at %p\n", bufsz, skb->data);
4518 /* Try again, without freeing the previous */
87f5032e 4519 skb = netdev_alloc_skb(netdev, bufsz);
2648345f 4520 /* Failed allocation, critical failure */
1da177e4
LT		 4521 if (!skb) {
4522 dev_kfree_skb(oldskb);
4523 break;
4524 }
2648345f 4525
1da177e4
LT		 4526 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4527 /* give up */
4528 dev_kfree_skb(skb);
4529 dev_kfree_skb(oldskb);
4530 break; /* while !buffer_info->skb */
1da177e4 4531 }
ca6f7224
CH		 4532
4533 /* Use new allocation */
4534 dev_kfree_skb(oldskb);
1da177e4 4535 }
1da177e4
LT		 4536 /* Make buffer alignment 2 beyond a 16 byte boundary
4537 * this will result in a 16 byte aligned IP header after
4538 * the 14 byte MAC header is removed
4539 */
4540 skb_reserve(skb, NET_IP_ALIGN);
4541
1da177e4
LT		 4542 buffer_info->skb = skb;
4543 buffer_info->length = adapter->rx_buffer_len;
a292ca6e 4544map_skb:
1da177e4
LT		 4545 buffer_info->dma = pci_map_single(pdev,
4546 skb->data,
4547 adapter->rx_buffer_len,
4548 PCI_DMA_FROMDEVICE);
4549
2648345f
MC		 4550 /* Fix for errata 23, can't cross 64kB boundary */
4551 if (!e1000_check_64k_bound(adapter,
4552 (void *)(unsigned long)buffer_info->dma,
4553 adapter->rx_buffer_len)) {
4554 DPRINTK(RX_ERR, ERR,
4555 "dma align check failed: %u bytes at %p\n",
4556 adapter->rx_buffer_len,
4557 (void *)(unsigned long)buffer_info->dma);
1da177e4
LT		 4558 dev_kfree_skb(skb);
4559 buffer_info->skb = NULL;
4560
2648345f 4561 pci_unmap_single(pdev, buffer_info->dma,
1da177e4
LT		 4562 adapter->rx_buffer_len,
4563 PCI_DMA_FROMDEVICE);
4564
4565 break; /* while !buffer_info->skb */
4566 }
1da177e4
LT		 4567 rx_desc = E1000_RX_DESC(*rx_ring, i);
4568 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4569
96838a40
JB		 4570 if (unlikely(++i == rx_ring->count))
4571 i = 0;
1da177e4
LT		 4572 buffer_info = &rx_ring->buffer_info[i];
4573 }
4574
b92ff8ee
JB		 4575 if (likely(rx_ring->next_to_use != i)) {
4576 rx_ring->next_to_use = i;
4577 if (unlikely(i-- == 0))
4578 i = (rx_ring->count - 1);
4579
4580 /* Force memory writes to complete before letting h/w
4581 * know there are new descriptors to fetch. (Only
4582 * applicable for weak-ordered memory model archs,
4583 * such as IA-64). */
4584 wmb();
4585 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4586 }
1da177e4
LT		 4587}
4588
2d7edb92
MC		 4589/**
4590 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4591 * @adapter: address of board private structure
4592 **/
4593
4594static void
581d708e 4595e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
72d64a43
JK		 4596 struct e1000_rx_ring *rx_ring,
4597 int cleaned_count)
2d7edb92 4598{
2d7edb92
MC		 4599 struct net_device *netdev = adapter->netdev;
4600 struct pci_dev *pdev = adapter->pdev;
4601 union e1000_rx_desc_packet_split *rx_desc;
4602 struct e1000_buffer *buffer_info;
4603 struct e1000_ps_page *ps_page;
4604 struct e1000_ps_page_dma *ps_page_dma;
4605 struct sk_buff *skb;
4606 unsigned int i, j;
4607
4608 i = rx_ring->next_to_use;
4609 buffer_info = &rx_ring->buffer_info[i];
4610 ps_page = &rx_ring->ps_page[i];
4611 ps_page_dma = &rx_ring->ps_page_dma[i];
4612
72d64a43 4613 while (cleaned_count--) {
2d7edb92
MC		 4614 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4615
96838a40 4616 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
e4c811c9
MC		 4617 if (j < adapter->rx_ps_pages) {
4618 if (likely(!ps_page->ps_page[j])) {
4619 ps_page->ps_page[j] =
4620 alloc_page(GFP_ATOMIC);
b92ff8ee
JB		 4621 if (unlikely(!ps_page->ps_page[j])) {
4622 adapter->alloc_rx_buff_failed++;
e4c811c9 4623 goto no_buffers;
b92ff8ee 4624 }
e4c811c9
MC		 4625 ps_page_dma->ps_page_dma[j] =
4626 pci_map_page(pdev,
4627 ps_page->ps_page[j],
4628 0, PAGE_SIZE,
4629 PCI_DMA_FROMDEVICE);
4630 }
4631 /* Refresh the desc even if buffer_addrs didn't
96838a40 4632 * change because each write-back erases
e4c811c9
MC		 4633 * this info.
4634 */
4635 rx_desc->read.buffer_addr[j+1] =
4636 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4637 } else
4638 rx_desc->read.buffer_addr[j+1] = ~0;
2d7edb92
MC		 4639 }
4640
87f5032e 4641 skb = netdev_alloc_skb(netdev,
90fb5135 4642 adapter->rx_ps_bsize0 + NET_IP_ALIGN);
2d7edb92 4643
b92ff8ee
JB		 4644 if (unlikely(!skb)) {
4645 adapter->alloc_rx_buff_failed++;
2d7edb92 4646 break;
b92ff8ee 4647 }
2d7edb92
MC		 4648
4649 /* Make buffer alignment 2 beyond a 16 byte boundary
4650 * this will result in a 16 byte aligned IP header after
4651 * the 14 byte MAC header is removed
4652 */
4653 skb_reserve(skb, NET_IP_ALIGN);
4654
2d7edb92
MC		 4655 buffer_info->skb = skb;
4656 buffer_info->length = adapter->rx_ps_bsize0;
4657 buffer_info->dma = pci_map_single(pdev, skb->data,
4658 adapter->rx_ps_bsize0,
4659 PCI_DMA_FROMDEVICE);
4660
4661 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4662
96838a40 4663 if (unlikely(++i == rx_ring->count)) i = 0;
2d7edb92
MC		 4664 buffer_info = &rx_ring->buffer_info[i];
4665 ps_page = &rx_ring->ps_page[i];
4666 ps_page_dma = &rx_ring->ps_page_dma[i];
4667 }
4668
4669no_buffers:
b92ff8ee
JB		 4670 if (likely(rx_ring->next_to_use != i)) {
4671 rx_ring->next_to_use = i;
4672 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4673
4674 /* Force memory writes to complete before letting h/w
4675 * know there are new descriptors to fetch. (Only
4676 * applicable for weak-ordered memory model archs,
4677 * such as IA-64). */
4678 wmb();
4679 /* Hardware increments by 16 bytes, but packet split
4680 * descriptors are 32 bytes...so we increment tail
4681 * twice as much.
4682 */
4683 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4684 }
2d7edb92
MC		 4685}
4686
1da177e4
LT		 4687/**
4688 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4689 * @adapter:
4690 **/
4691
4692static void
4693e1000_smartspeed(struct e1000_adapter *adapter)
4694{
4695 uint16_t phy_status;
4696 uint16_t phy_ctrl;
4697
96838a40 4698 if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
1da177e4
LT		 4699 !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4700 return;
4701
96838a40 4702 if (adapter->smartspeed == 0) {
1da177e4
LT		 4703 /* If Master/Slave config fault is asserted twice,
4704 * we assume back-to-back */
4705 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
96838a40 4706 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
1da177e4 4707 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
96838a40 4708 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
1da177e4 4709 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
96838a40 4710 if (phy_ctrl & CR_1000T_MS_ENABLE) {
1da177e4
LT		 4711 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4712 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4713 phy_ctrl);
4714 adapter->smartspeed++;
96838a40 4715 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
1da177e4
LT		 4716 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4717 &phy_ctrl)) {
4718 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4719 MII_CR_RESTART_AUTO_NEG);
4720 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4721 phy_ctrl);
4722 }
4723 }
4724 return;
96838a40 4725 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
1da177e4
LT		 4726 /* If still no link, perhaps using 2/3 pair cable */
4727 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4728 phy_ctrl |= CR_1000T_MS_ENABLE;
4729 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
96838a40 4730 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
1da177e4
LT		 4731 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4732 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4733 MII_CR_RESTART_AUTO_NEG);
4734 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4735 }
4736 }
4737 /* Restart process after E1000_SMARTSPEED_MAX iterations */
96838a40 4738 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
1da177e4
LT		 4739 adapter->smartspeed = 0;
4740}
4741
4742/**
4743 * e1000_ioctl -
4744 * @netdev:
4745 * @ifreq:
4746 * @cmd:
4747 **/
4748
4749static int
4750e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4751{
4752 switch (cmd) {
4753 case SIOCGMIIPHY:
4754 case SIOCGMIIREG:
4755 case SIOCSMIIREG:
4756 return e1000_mii_ioctl(netdev, ifr, cmd);
4757 default:
4758 return -EOPNOTSUPP;
4759 }
4760}
4761
4762/**
4763 * e1000_mii_ioctl -
4764 * @netdev:
4765 * @ifreq:
4766 * @cmd:
4767 **/
4768
4769static int
4770e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4771{
60490fe0 4772 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 4773 struct mii_ioctl_data *data = if_mii(ifr);
4774 int retval;
4775 uint16_t mii_reg;
4776 uint16_t spddplx;
97876fc6 4777 unsigned long flags;
1da177e4 4778
96838a40 4779 if (adapter->hw.media_type != e1000_media_type_copper)
1da177e4
LT		 4780 return -EOPNOTSUPP;
4781
4782 switch (cmd) {
4783 case SIOCGMIIPHY:
4784 data->phy_id = adapter->hw.phy_addr;
4785 break;
4786 case SIOCGMIIREG:
96838a40 4787 if (!capable(CAP_NET_ADMIN))
1da177e4 4788 return -EPERM;
97876fc6 4789 spin_lock_irqsave(&adapter->stats_lock, flags);
96838a40 4790 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
97876fc6
MC		 4791 &data->val_out)) {
4792 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4 4793 return -EIO;
97876fc6
MC		 4794 }
4795 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4
LT		 4796 break;
4797 case SIOCSMIIREG:
96838a40 4798 if (!capable(CAP_NET_ADMIN))
1da177e4 4799 return -EPERM;
96838a40 4800 if (data->reg_num & ~(0x1F))
1da177e4
LT		 4801 return -EFAULT;
4802 mii_reg = data->val_in;
97876fc6 4803 spin_lock_irqsave(&adapter->stats_lock, flags);
96838a40 4804 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
97876fc6
MC		 4805 mii_reg)) {
4806 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4 4807 return -EIO;
97876fc6 4808 }
dc86d32a 4809 if (adapter->hw.media_type == e1000_media_type_copper) {
1da177e4
LT		 4810 switch (data->reg_num) {
4811 case PHY_CTRL:
96838a40 4812 if (mii_reg & MII_CR_POWER_DOWN)
1da177e4 4813 break;
96838a40 4814 if (mii_reg & MII_CR_AUTO_NEG_EN) {
1da177e4
LT		 4815 adapter->hw.autoneg = 1;
4816 adapter->hw.autoneg_advertised = 0x2F;
4817 } else {
4818 if (mii_reg & 0x40)
4819 spddplx = SPEED_1000;
4820 else if (mii_reg & 0x2000)
4821 spddplx = SPEED_100;
4822 else
4823 spddplx = SPEED_10;
4824 spddplx += (mii_reg & 0x100)
cb764326
JK		 4825 ? DUPLEX_FULL :
4826 DUPLEX_HALF;
1da177e4
LT		 4827 retval = e1000_set_spd_dplx(adapter,
4828 spddplx);
96838a40 4829 if (retval) {
97876fc6 4830 spin_unlock_irqrestore(
96838a40 4831 &adapter->stats_lock,
97876fc6 4832 flags);
1da177e4 4833 return retval;
97876fc6 4834 }
1da177e4 4835 }
2db10a08
AK		 4836 if (netif_running(adapter->netdev))
4837 e1000_reinit_locked(adapter);
4838 else
1da177e4
LT		 4839 e1000_reset(adapter);
4840 break;
4841 case M88E1000_PHY_SPEC_CTRL:
4842 case M88E1000_EXT_PHY_SPEC_CTRL:
96838a40 4843 if (e1000_phy_reset(&adapter->hw)) {
97876fc6
MC		 4844 spin_unlock_irqrestore(
4845 &adapter->stats_lock, flags);
1da177e4 4846 return -EIO;
97876fc6 4847 }
1da177e4
LT		 4848 break;
4849 }
4850 } else {
4851 switch (data->reg_num) {
4852 case PHY_CTRL:
96838a40 4853 if (mii_reg & MII_CR_POWER_DOWN)
1da177e4 4854 break;
2db10a08
AK		 4855 if (netif_running(adapter->netdev))
4856 e1000_reinit_locked(adapter);
4857 else
1da177e4
LT		 4858 e1000_reset(adapter);
4859 break;
4860 }
4861 }
97876fc6 4862 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1da177e4
LT		 4863 break;
4864 default:
4865 return -EOPNOTSUPP;
4866 }
4867 return E1000_SUCCESS;
4868}
4869
4870void
4871e1000_pci_set_mwi(struct e1000_hw *hw)
4872{
4873 struct e1000_adapter *adapter = hw->back;
2648345f 4874 int ret_val = pci_set_mwi(adapter->pdev);
1da177e4 4875
96838a40 4876 if (ret_val)
2648345f 4877 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
1da177e4
LT		 4878}
4879
4880void
4881e1000_pci_clear_mwi(struct e1000_hw *hw)
4882{
4883 struct e1000_adapter *adapter = hw->back;
4884
4885 pci_clear_mwi(adapter->pdev);
4886}
4887
4888void
4889e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4890{
4891 struct e1000_adapter *adapter = hw->back;
4892
4893 pci_read_config_word(adapter->pdev, reg, value);
4894}
4895
4896void
4897e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4898{
4899 struct e1000_adapter *adapter = hw->back;
4900
4901 pci_write_config_word(adapter->pdev, reg, *value);
4902}
4903
caeccb68
JK		 4904int32_t
4905e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4906{
4907 struct e1000_adapter *adapter = hw->back;
4908 uint16_t cap_offset;
4909
4910 cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4911 if (!cap_offset)
4912 return -E1000_ERR_CONFIG;
4913
4914 pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4915
4916 return E1000_SUCCESS;
4917}
4918
1da177e4
LT		 4919void
4920e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4921{
4922 outl(value, port);
4923}
4924
4925static void
4926e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4927{
60490fe0 4928 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 4929 uint32_t ctrl, rctl;
4930
4931 e1000_irq_disable(adapter);
4932 adapter->vlgrp = grp;
4933
96838a40 4934 if (grp) {
1da177e4
LT		 4935 /* enable VLAN tag insert/strip */
4936 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4937 ctrl |= E1000_CTRL_VME;
4938 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4939
cd94dd0b 4940 if (adapter->hw.mac_type != e1000_ich8lan) {
90fb5135
AK		 4941 /* enable VLAN receive filtering */
4942 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4943 rctl |= E1000_RCTL_VFE;
4944 rctl &= ~E1000_RCTL_CFIEN;
4945 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4946 e1000_update_mng_vlan(adapter);
cd94dd0b 4947 }
1da177e4
LT		 4948 } else {
4949 /* disable VLAN tag insert/strip */
4950 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4951 ctrl &= ~E1000_CTRL_VME;
4952 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4953
cd94dd0b 4954 if (adapter->hw.mac_type != e1000_ich8lan) {
90fb5135
AK		 4955 /* disable VLAN filtering */
4956 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4957 rctl &= ~E1000_RCTL_VFE;
4958 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4959 if (adapter->mng_vlan_id !=
4960 (uint16_t)E1000_MNG_VLAN_NONE) {
4961 e1000_vlan_rx_kill_vid(netdev,
4962 adapter->mng_vlan_id);
4963 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4964 }
cd94dd0b 4965 }
1da177e4
LT		 4966 }
4967
4968 e1000_irq_enable(adapter);
4969}
4970
4971static void
4972e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4973{
60490fe0 4974 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4 4975 uint32_t vfta, index;
96838a40
JB		 4976
4977 if ((adapter->hw.mng_cookie.status &
4978 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4979 (vid == adapter->mng_vlan_id))
2d7edb92 4980 return;
1da177e4
LT		 4981 /* add VID to filter table */
4982 index = (vid >> 5) & 0x7F;
4983 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4984 vfta |= (1 << (vid & 0x1F));
4985 e1000_write_vfta(&adapter->hw, index, vfta);
4986}
4987
4988static void
4989e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4990{
60490fe0 4991 struct e1000_adapter *adapter = netdev_priv(netdev);
1da177e4
LT		 4992 uint32_t vfta, index;
4993
4994 e1000_irq_disable(adapter);
5c15bdec 4995 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1da177e4
LT		 4996 e1000_irq_enable(adapter);
4997
96838a40
JB		 4998 if ((adapter->hw.mng_cookie.status &
4999 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
ff147013
JK		 5000 (vid == adapter->mng_vlan_id)) {
5001 /* release control to f/w */
5002 e1000_release_hw_control(adapter);
2d7edb92 5003 return;
ff147013
JK		 5004 }
5005
1da177e4
LT		 5006 /* remove VID from filter table */
5007 index = (vid >> 5) & 0x7F;
5008 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5009 vfta &= ~(1 << (vid & 0x1F));
5010 e1000_write_vfta(&adapter->hw, index, vfta);
5011}
5012
5013static void
5014e1000_restore_vlan(struct e1000_adapter *adapter)
5015{
5016 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5017
96838a40 5018 if (adapter->vlgrp) {
1da177e4 5019 uint16_t vid;
96838a40 5020 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5c15bdec 5021 if (!vlan_group_get_device(adapter->vlgrp, vid))
1da177e4
LT		 5022 continue;
5023 e1000_vlan_rx_add_vid(adapter->netdev, vid);
5024 }
5025 }
5026}
5027
5028int
5029e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
5030{
5031 adapter->hw.autoneg = 0;
5032
6921368f 5033 /* Fiber NICs only allow 1000 gbps Full duplex */
96838a40 5034 if ((adapter->hw.media_type == e1000_media_type_fiber) &&
6921368f
MC		 5035 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5036 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5037 return -EINVAL;
5038 }
5039
96838a40 5040 switch (spddplx) {
1da177e4
LT		 5041 case SPEED_10 + DUPLEX_HALF:
5042 adapter->hw.forced_speed_duplex = e1000_10_half;
5043 break;
5044 case SPEED_10 + DUPLEX_FULL:
5045 adapter->hw.forced_speed_duplex = e1000_10_full;
5046 break;
5047 case SPEED_100 + DUPLEX_HALF:
5048 adapter->hw.forced_speed_duplex = e1000_100_half;
5049 break;
5050 case SPEED_100 + DUPLEX_FULL:
5051 adapter->hw.forced_speed_duplex = e1000_100_full;
5052 break;
5053 case SPEED_1000 + DUPLEX_FULL:
5054 adapter->hw.autoneg = 1;
5055 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5056 break;
5057 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5058 default:
2648345f 5059 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
1da177e4
LT		 5060 return -EINVAL;
5061 }
5062 return 0;
5063}
5064
1da177e4 5065static int
829ca9a3 5066e1000_suspend(struct pci_dev *pdev, pm_message_t state)
1da177e4
LT		 5067{
5068 struct net_device *netdev = pci_get_drvdata(pdev);
60490fe0 5069 struct e1000_adapter *adapter = netdev_priv(netdev);
0fccd0e9 5070 uint32_t ctrl, ctrl_ext, rctl, status;
1da177e4 5071 uint32_t wufc = adapter->wol;
6fdfef16 5072#ifdef CONFIG_PM
240b1710 5073 int retval = 0;
6fdfef16 5074#endif
1da177e4
LT		 5075
5076 netif_device_detach(netdev);
5077
2db10a08
AK		 5078 if (netif_running(netdev)) {
5079 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1da177e4 5080 e1000_down(adapter);
2db10a08 5081 }
1da177e4 5082
2f82665f 5083#ifdef CONFIG_PM
1d33e9c6 5084 retval = pci_save_state(pdev);
2f82665f
JB		 5085 if (retval)
5086 return retval;
5087#endif
5088
1da177e4 5089 status = E1000_READ_REG(&adapter->hw, STATUS);
96838a40 5090 if (status & E1000_STATUS_LU)
1da177e4
LT		 5091 wufc &= ~E1000_WUFC_LNKC;
5092
96838a40 5093 if (wufc) {
1da177e4
LT		 5094 e1000_setup_rctl(adapter);
5095 e1000_set_multi(netdev);
5096
5097 /* turn on all-multi mode if wake on multicast is enabled */
120cd576 5098 if (wufc & E1000_WUFC_MC) {
1da177e4
LT		 5099 rctl = E1000_READ_REG(&adapter->hw, RCTL);
5100 rctl |= E1000_RCTL_MPE;
5101 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5102 }
5103
96838a40 5104 if (adapter->hw.mac_type >= e1000_82540) {
1da177e4
LT		 5105 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5106 /* advertise wake from D3Cold */
5107 #define E1000_CTRL_ADVD3WUC 0x00100000
5108 /* phy power management enable */
5109 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5110 ctrl |= E1000_CTRL_ADVD3WUC |
5111 E1000_CTRL_EN_PHY_PWR_MGMT;
5112 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5113 }
5114
96838a40 5115 if (adapter->hw.media_type == e1000_media_type_fiber ||
1da177e4
LT		 5116 adapter->hw.media_type == e1000_media_type_internal_serdes) {
5117 /* keep the laser running in D3 */
5118 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
5119 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5120 E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
5121 }
5122
2d7edb92
MC		 5123 /* Allow time for pending master requests to run */
5124 e1000_disable_pciex_master(&adapter->hw);
5125
1da177e4
LT		 5126 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
5127 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
d0e027db
AK		 5128 pci_enable_wake(pdev, PCI_D3hot, 1);
5129 pci_enable_wake(pdev, PCI_D3cold, 1);
1da177e4
LT		 5130 } else {
5131 E1000_WRITE_REG(&adapter->hw, WUC, 0);
5132 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
d0e027db
AK		 5133 pci_enable_wake(pdev, PCI_D3hot, 0);
5134 pci_enable_wake(pdev, PCI_D3cold, 0);
1da177e4
LT		 5135 }
5136
0fccd0e9
JG		 5137 e1000_release_manageability(adapter);
5138
5139 /* make sure adapter isn't asleep if manageability is enabled */
5140 if (adapter->en_mng_pt) {
5141 pci_enable_wake(pdev, PCI_D3hot, 1);
5142 pci_enable_wake(pdev, PCI_D3cold, 1);
1da177e4
LT		 5143 }
5144
cd94dd0b
AK		 5145 if (adapter->hw.phy_type == e1000_phy_igp_3)
5146 e1000_phy_powerdown_workaround(&adapter->hw);
5147
edd106fc
AK		 5148 if (netif_running(netdev))
5149 e1000_free_irq(adapter);
5150
b55ccb35
JK		 5151 /* Release control of h/w to f/w. If f/w is AMT enabled, this
5152 * would have already happened in close and is redundant. */
5153 e1000_release_hw_control(adapter);
2d7edb92 5154
1da177e4 5155 pci_disable_device(pdev);
240b1710 5156
d0e027db 5157 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1da177e4
LT		 5158
5159 return 0;
5160}
5161
2f82665f 5162#ifdef CONFIG_PM
1da177e4
LT		 5163static int
5164e1000_resume(struct pci_dev *pdev)
5165{
5166 struct net_device *netdev = pci_get_drvdata(pdev);
60490fe0 5167 struct e1000_adapter *adapter = netdev_priv(netdev);
0fccd0e9 5168 uint32_t err;
1da177e4 5169
d0e027db 5170 pci_set_power_state(pdev, PCI_D0);
1d33e9c6 5171 pci_restore_state(pdev);
3d1dd8cb
AK		 5172 if ((err = pci_enable_device(pdev))) {
5173 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5174 return err;
5175 }
a4cb847d 5176 pci_set_master(pdev);
1da177e4 5177
d0e027db
AK		 5178 pci_enable_wake(pdev, PCI_D3hot, 0);
5179 pci_enable_wake(pdev, PCI_D3cold, 0);
1da177e4 5180
edd106fc
AK		 5181 if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5182 return err;
5183
5184 e1000_power_up_phy(adapter);
1da177e4
LT		 5185 e1000_reset(adapter);
5186 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5187
0fccd0e9
JG		 5188 e1000_init_manageability(adapter);
5189
96838a40 5190 if (netif_running(netdev))
1da177e4
LT		 5191 e1000_up(adapter);
5192
5193 netif_device_attach(netdev);
5194
b55ccb35
JK		 5195 /* If the controller is 82573 and f/w is AMT, do not set
5196 * DRV_LOAD until the interface is up. For all other cases,
5197 * let the f/w know that the h/w is now under the control
5198 * of the driver. */
5199 if (adapter->hw.mac_type != e1000_82573 ||
5200 !e1000_check_mng_mode(&adapter->hw))
5201 e1000_get_hw_control(adapter);
2d7edb92 5202
1da177e4
LT		 5203 return 0;
5204}
5205#endif
c653e635
AK		 5206
5207static void e1000_shutdown(struct pci_dev *pdev)
5208{
5209 e1000_suspend(pdev, PMSG_SUSPEND);
5210}
5211
1da177e4
LT		 5212#ifdef CONFIG_NET_POLL_CONTROLLER
5213/*
5214 * Polling 'interrupt' - used by things like netconsole to send skbs
5215 * without having to re-enable interrupts. It's not called while
5216 * the interrupt routine is executing.
5217 */
5218static void
2648345f 5219e1000_netpoll(struct net_device *netdev)
1da177e4 5220{
60490fe0 5221 struct e1000_adapter *adapter = netdev_priv(netdev);
d3d9e484 5222
1da177e4 5223 disable_irq(adapter->pdev->irq);
7d12e780 5224 e1000_intr(adapter->pdev->irq, netdev);
c4cfe567 5225 e1000_clean_tx_irq(adapter, adapter->tx_ring);
e8da8be1
JK		 5226#ifndef CONFIG_E1000_NAPI
5227 adapter->clean_rx(adapter, adapter->rx_ring);
5228#endif
1da177e4
LT		 5229 enable_irq(adapter->pdev->irq);
5230}
5231#endif
5232
9026729b
AK		 5233/**
5234 * e1000_io_error_detected - called when PCI error is detected
5235 * @pdev: Pointer to PCI device
5236 * @state: The current pci conneection state
5237 *
5238 * This function is called after a PCI bus error affecting
5239 * this device has been detected.
5240 */
5241static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
5242{
5243 struct net_device *netdev = pci_get_drvdata(pdev);
5244 struct e1000_adapter *adapter = netdev->priv;
5245
5246 netif_device_detach(netdev);
5247
5248 if (netif_running(netdev))
5249 e1000_down(adapter);
72e8d6bb 5250 pci_disable_device(pdev);
9026729b
AK		 5251
5252 /* Request a slot slot reset. */
5253 return PCI_ERS_RESULT_NEED_RESET;
5254}
5255
5256/**
5257 * e1000_io_slot_reset - called after the pci bus has been reset.
5258 * @pdev: Pointer to PCI device
5259 *
5260 * Restart the card from scratch, as if from a cold-boot. Implementation
5261 * resembles the first-half of the e1000_resume routine.
5262 */
5263static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5264{
5265 struct net_device *netdev = pci_get_drvdata(pdev);
5266 struct e1000_adapter *adapter = netdev->priv;
5267
5268 if (pci_enable_device(pdev)) {
5269 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5270 return PCI_ERS_RESULT_DISCONNECT;
5271 }
5272 pci_set_master(pdev);
5273
dbf38c94
LV		 5274 pci_enable_wake(pdev, PCI_D3hot, 0);
5275 pci_enable_wake(pdev, PCI_D3cold, 0);
9026729b 5276
9026729b
AK		 5277 e1000_reset(adapter);
5278 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5279
5280 return PCI_ERS_RESULT_RECOVERED;
5281}
5282
5283/**
5284 * e1000_io_resume - called when traffic can start flowing again.
5285 * @pdev: Pointer to PCI device
5286 *
5287 * This callback is called when the error recovery driver tells us that
5288 * its OK to resume normal operation. Implementation resembles the
5289 * second-half of the e1000_resume routine.
5290 */
5291static void e1000_io_resume(struct pci_dev *pdev)
5292{
5293 struct net_device *netdev = pci_get_drvdata(pdev);
5294 struct e1000_adapter *adapter = netdev->priv;
0fccd0e9
JG		 5295
5296 e1000_init_manageability(adapter);
9026729b
AK		 5297
5298 if (netif_running(netdev)) {
5299 if (e1000_up(adapter)) {
5300 printk("e1000: can't bring device back up after reset\n");
5301 return;
5302 }
5303 }
5304
5305 netif_device_attach(netdev);
5306
0fccd0e9
JG		 5307 /* If the controller is 82573 and f/w is AMT, do not set
5308 * DRV_LOAD until the interface is up. For all other cases,
5309 * let the f/w know that the h/w is now under the control
5310 * of the driver. */
5311 if (adapter->hw.mac_type != e1000_82573 ||
5312 !e1000_check_mng_mode(&adapter->hw))
5313 e1000_get_hw_control(adapter);
9026729b 5314
9026729b
AK		 5315}
5316
1da177e4 5317/* e1000_main.c */
Clone of davem's net-next-2.6 tree