Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6
[linux-2.6.git] / drivers / net / e1000 / e1000_main.c
1 /*******************************************************************************
2
3   Intel PRO/1000 Linux driver
4   Copyright(c) 1999 - 2006 Intel Corporation.
5
6   This program is free software; you can redistribute it and/or modify it
7   under the terms and conditions of the GNU General Public License,
8   version 2, as published by the Free Software Foundation.
9
10   This program is distributed in the hope it will be useful, but WITHOUT
11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13   more details.
14
15   You should have received a copy of the GNU General Public License along with
16   this program; if not, write to the Free Software Foundation, Inc.,
17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19   The full GNU General Public License is included in this distribution in
20   the file called "COPYING".
21
22   Contact Information:
23   Linux NICS <linux.nics@intel.com>
24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27 *******************************************************************************/
28
29 #include "e1000.h"
30 #include <net/ip6_checksum.h>
31
32 char e1000_driver_name[] = "e1000";
33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
34 #ifndef CONFIG_E1000_NAPI
35 #define DRIVERNAPI
36 #else
37 #define DRIVERNAPI "-NAPI"
38 #endif
39 #define DRV_VERSION "7.3.20-k2"DRIVERNAPI
40 char e1000_driver_version[] = DRV_VERSION;
41 static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
42
43 /* e1000_pci_tbl - PCI Device ID Table
44  *
45  * Last entry must be all 0s
46  *
47  * Macro expands to...
48  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
49  */
50 static struct pci_device_id e1000_pci_tbl[] = {
51         INTEL_E1000_ETHERNET_DEVICE(0x1000),
52         INTEL_E1000_ETHERNET_DEVICE(0x1001),
53         INTEL_E1000_ETHERNET_DEVICE(0x1004),
54         INTEL_E1000_ETHERNET_DEVICE(0x1008),
55         INTEL_E1000_ETHERNET_DEVICE(0x1009),
56         INTEL_E1000_ETHERNET_DEVICE(0x100C),
57         INTEL_E1000_ETHERNET_DEVICE(0x100D),
58         INTEL_E1000_ETHERNET_DEVICE(0x100E),
59         INTEL_E1000_ETHERNET_DEVICE(0x100F),
60         INTEL_E1000_ETHERNET_DEVICE(0x1010),
61         INTEL_E1000_ETHERNET_DEVICE(0x1011),
62         INTEL_E1000_ETHERNET_DEVICE(0x1012),
63         INTEL_E1000_ETHERNET_DEVICE(0x1013),
64         INTEL_E1000_ETHERNET_DEVICE(0x1014),
65         INTEL_E1000_ETHERNET_DEVICE(0x1015),
66         INTEL_E1000_ETHERNET_DEVICE(0x1016),
67         INTEL_E1000_ETHERNET_DEVICE(0x1017),
68         INTEL_E1000_ETHERNET_DEVICE(0x1018),
69         INTEL_E1000_ETHERNET_DEVICE(0x1019),
70         INTEL_E1000_ETHERNET_DEVICE(0x101A),
71         INTEL_E1000_ETHERNET_DEVICE(0x101D),
72         INTEL_E1000_ETHERNET_DEVICE(0x101E),
73         INTEL_E1000_ETHERNET_DEVICE(0x1026),
74         INTEL_E1000_ETHERNET_DEVICE(0x1027),
75         INTEL_E1000_ETHERNET_DEVICE(0x1028),
76         INTEL_E1000_ETHERNET_DEVICE(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),
81         INTEL_E1000_ETHERNET_DEVICE(0x105E),
82         INTEL_E1000_ETHERNET_DEVICE(0x105F),
83         INTEL_E1000_ETHERNET_DEVICE(0x1060),
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),
92         INTEL_E1000_ETHERNET_DEVICE(0x107D),
93         INTEL_E1000_ETHERNET_DEVICE(0x107E),
94         INTEL_E1000_ETHERNET_DEVICE(0x107F),
95         INTEL_E1000_ETHERNET_DEVICE(0x108A),
96         INTEL_E1000_ETHERNET_DEVICE(0x108B),
97         INTEL_E1000_ETHERNET_DEVICE(0x108C),
98         INTEL_E1000_ETHERNET_DEVICE(0x1096),
99         INTEL_E1000_ETHERNET_DEVICE(0x1098),
100         INTEL_E1000_ETHERNET_DEVICE(0x1099),
101         INTEL_E1000_ETHERNET_DEVICE(0x109A),
102         INTEL_E1000_ETHERNET_DEVICE(0x10A4),
103         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
104         INTEL_E1000_ETHERNET_DEVICE(0x10B9),
105         INTEL_E1000_ETHERNET_DEVICE(0x10BA),
106         INTEL_E1000_ETHERNET_DEVICE(0x10BB),
107         INTEL_E1000_ETHERNET_DEVICE(0x10BC),
108         INTEL_E1000_ETHERNET_DEVICE(0x10C4),
109         INTEL_E1000_ETHERNET_DEVICE(0x10C5),
110         /* required last entry */
111         {0,}
112 };
113
114 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
115
116 int e1000_up(struct e1000_adapter *adapter);
117 void e1000_down(struct e1000_adapter *adapter);
118 void e1000_reinit_locked(struct e1000_adapter *adapter);
119 void e1000_reset(struct e1000_adapter *adapter);
120 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
121 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
122 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
123 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
124 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
125 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
126                              struct e1000_tx_ring *txdr);
127 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
128                              struct e1000_rx_ring *rxdr);
129 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
130                              struct e1000_tx_ring *tx_ring);
131 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
132                              struct e1000_rx_ring *rx_ring);
133 void e1000_update_stats(struct e1000_adapter *adapter);
134
135 static int e1000_init_module(void);
136 static void e1000_exit_module(void);
137 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
138 static void __devexit e1000_remove(struct pci_dev *pdev);
139 static int e1000_alloc_queues(struct e1000_adapter *adapter);
140 static int e1000_sw_init(struct e1000_adapter *adapter);
141 static int e1000_open(struct net_device *netdev);
142 static int e1000_close(struct net_device *netdev);
143 static void e1000_configure_tx(struct e1000_adapter *adapter);
144 static void e1000_configure_rx(struct e1000_adapter *adapter);
145 static void e1000_setup_rctl(struct e1000_adapter *adapter);
146 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
147 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
148 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
149                                 struct e1000_tx_ring *tx_ring);
150 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
151                                 struct e1000_rx_ring *rx_ring);
152 static void e1000_set_multi(struct net_device *netdev);
153 static void e1000_update_phy_info(unsigned long data);
154 static void e1000_watchdog(unsigned long data);
155 static void e1000_82547_tx_fifo_stall(unsigned long data);
156 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
157 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
158 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
159 static int e1000_set_mac(struct net_device *netdev, void *p);
160 static irqreturn_t e1000_intr(int irq, void *data);
161 #ifdef CONFIG_PCI_MSI
162 static irqreturn_t e1000_intr_msi(int irq, void *data);
163 #endif
164 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
165                                     struct e1000_tx_ring *tx_ring);
166 #ifdef CONFIG_E1000_NAPI
167 static int e1000_clean(struct net_device *poll_dev, int *budget);
168 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
169                                     struct e1000_rx_ring *rx_ring,
170                                     int *work_done, int work_to_do);
171 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
172                                        struct e1000_rx_ring *rx_ring,
173                                        int *work_done, int work_to_do);
174 #else
175 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
176                                     struct e1000_rx_ring *rx_ring);
177 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
178                                        struct e1000_rx_ring *rx_ring);
179 #endif
180 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
181                                    struct e1000_rx_ring *rx_ring,
182                                    int cleaned_count);
183 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
184                                       struct e1000_rx_ring *rx_ring,
185                                       int cleaned_count);
186 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
187 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
188                            int cmd);
189 void e1000_set_ethtool_ops(struct net_device *netdev);
190 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
191 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
192 static void e1000_tx_timeout(struct net_device *dev);
193 static void e1000_reset_task(struct work_struct *work);
194 static void e1000_smartspeed(struct e1000_adapter *adapter);
195 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
196                                        struct sk_buff *skb);
197
198 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
199 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
200 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
201 static void e1000_restore_vlan(struct e1000_adapter *adapter);
202
203 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
204 #ifdef CONFIG_PM
205 static int e1000_resume(struct pci_dev *pdev);
206 #endif
207 static void e1000_shutdown(struct pci_dev *pdev);
208
209 #ifdef CONFIG_NET_POLL_CONTROLLER
210 /* for netdump / net console */
211 static void e1000_netpoll (struct net_device *netdev);
212 #endif
213
214 extern void e1000_check_options(struct e1000_adapter *adapter);
215
216 #define COPYBREAK_DEFAULT 256
217 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
218 module_param(copybreak, uint, 0644);
219 MODULE_PARM_DESC(copybreak,
220         "Maximum size of packet that is copied to a new buffer on receive");
221
222 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
223                      pci_channel_state_t state);
224 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
225 static void e1000_io_resume(struct pci_dev *pdev);
226
227 static 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 };
232
233 static 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),
238 #ifdef CONFIG_PM
239         /* Power Managment Hooks */
240         .suspend  = e1000_suspend,
241         .resume   = e1000_resume,
242 #endif
243         .shutdown = e1000_shutdown,
244         .err_handler = &e1000_err_handler
245 };
246
247 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
248 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
249 MODULE_LICENSE("GPL");
250 MODULE_VERSION(DRV_VERSION);
251
252 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
253 module_param(debug, int, 0);
254 MODULE_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
263 static int __init
264 e1000_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
272         ret = pci_register_driver(&e1000_driver);
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         }
280         return ret;
281 }
282
283 module_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
292 static void __exit
293 e1000_exit_module(void)
294 {
295         pci_unregister_driver(&e1000_driver);
296 }
297
298 module_exit(e1000_exit_module);
299
300 static int e1000_request_irq(struct e1000_adapter *adapter)
301 {
302         struct net_device *netdev = adapter->netdev;
303         int flags, err = 0;
304
305         flags = IRQF_SHARED;
306 #ifdef CONFIG_PCI_MSI
307         if (adapter->hw.mac_type >= e1000_82571) {
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         }
315         if (adapter->have_msi) {
316                 flags &= ~IRQF_SHARED;
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
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
332 static 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
344 /**
345  * e1000_irq_disable - Mask off interrupt generation on the NIC
346  * @adapter: board private structure
347  **/
348
349 static void
350 e1000_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
363 static void
364 e1000_irq_enable(struct e1000_adapter *adapter)
365 {
366         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
367                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
368                 E1000_WRITE_FLUSH(&adapter->hw);
369         }
370 }
371
372 static void
373 e1000_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;
378         if (adapter->vlgrp) {
379                 if (!adapter->vlgrp->vlan_devices[vid]) {
380                         if (adapter->hw.mng_cookie.status &
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;
386
387                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
388                                         (vid != old_vid) &&
389                                         !adapter->vlgrp->vlan_devices[old_vid])
390                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
391                 } else
392                         adapter->mng_vlan_id = vid;
393         }
394 }
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
403  * of the f/w this means that the network i/f is closed.
404  *
405  **/
406
407 static void
408 e1000_release_hw_control(struct e1000_adapter *adapter)
409 {
410         uint32_t ctrl_ext;
411         uint32_t swsm;
412         uint32_t extcnf;
413
414         /* Let firmware taken over control of h/w */
415         switch (adapter->hw.mac_type) {
416         case e1000_82571:
417         case e1000_82572:
418         case e1000_80003es2lan:
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);
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;
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.
442  * For ASF and Pass Through versions of f/w this means that
443  * the driver is loaded. For AMT version (only with 82573)
444  * of the f/w this means that the network i/f is open.
445  *
446  **/
447
448 static void
449 e1000_get_hw_control(struct e1000_adapter *adapter)
450 {
451         uint32_t ctrl_ext;
452         uint32_t swsm;
453         uint32_t extcnf;
454
455         /* Let firmware know the driver has taken over */
456         switch (adapter->hw.mac_type) {
457         case e1000_82571:
458         case e1000_82572:
459         case e1000_80003es2lan:
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;
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;
474         default:
475                 break;
476         }
477 }
478
479 static void
480 e1000_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
506 static void
507 e1000_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
525 int
526 e1000_up(struct e1000_adapter *adapter)
527 {
528         struct net_device *netdev = adapter->netdev;
529         int i;
530
531         /* hardware has been reset, we need to reload some things */
532
533         e1000_set_multi(netdev);
534
535         e1000_restore_vlan(adapter);
536         e1000_init_manageability(adapter);
537
538         e1000_configure_tx(adapter);
539         e1000_setup_rctl(adapter);
540         e1000_configure_rx(adapter);
541         /* call E1000_DESC_UNUSED which always leaves
542          * at least 1 descriptor unused to make sure
543          * next_to_use != next_to_clean */
544         for (i = 0; i < adapter->num_rx_queues; i++) {
545                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
546                 adapter->alloc_rx_buf(adapter, ring,
547                                       E1000_DESC_UNUSED(ring));
548         }
549
550         adapter->tx_queue_len = netdev->tx_queue_len;
551
552 #ifdef CONFIG_E1000_NAPI
553         netif_poll_enable(netdev);
554 #endif
555         e1000_irq_enable(adapter);
556
557         clear_bit(__E1000_DOWN, &adapter->flags);
558
559         /* fire a link change interrupt to start the watchdog */
560         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
561         return 0;
562 }
563
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
574 void e1000_power_up_phy(struct e1000_adapter *adapter)
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
588 static void e1000_power_down_phy(struct e1000_adapter *adapter)
589 {
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 *
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 &&
596            adapter->hw.media_type == e1000_media_type_copper) {
597                 uint16_t mii_reg = 0;
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                 }
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         }
630 out:
631         return;
632 }
633
634 void
635 e1000_down(struct e1000_adapter *adapter)
636 {
637         struct net_device *netdev = adapter->netdev;
638
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
643         e1000_irq_disable(adapter);
644
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
652         netdev->tx_queue_len = adapter->tx_queue_len;
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);
659         e1000_clean_all_tx_rings(adapter);
660         e1000_clean_all_rx_rings(adapter);
661 }
662
663 void
664 e1000_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);
672 }
673
674 void
675 e1000_reset(struct e1000_adapter *adapter)
676 {
677         uint32_t pba = 0, tx_space, min_tx_space, min_rx_space;
678         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
679         boolean_t legacy_pba_adjust = FALSE;
680
681         /* Repartition Pba for greater than 9k mtu
682          * To take effect CTRL.RST is required.
683          */
684
685         switch (adapter->hw.mac_type) {
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;
702         case e1000_82547:
703         case e1000_82547_rev_2:
704                 legacy_pba_adjust = TRUE;
705                 pba = E1000_PBA_30K;
706                 break;
707         case e1000_82571:
708         case e1000_82572:
709         case e1000_80003es2lan:
710                 pba = E1000_PBA_38K;
711                 break;
712         case e1000_82573:
713                 pba = E1000_PBA_20K;
714                 break;
715         case e1000_ich8lan:
716                 pba = E1000_PBA_8K;
717         case e1000_undefined:
718         case e1000_num_macs:
719                 break;
720         }
721
722         if (legacy_pba_adjust == TRUE) {
723                 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
724                         pba -= 8; /* allocate more FIFO for Tx */
725
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                 }
787         }
788
789         E1000_WRITE_REG(&adapter->hw, PBA, pba);
790
791         /* flow control settings */
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;
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;
801
802         adapter->hw.fc_high_water = fc_high_water_mark;
803         adapter->hw.fc_low_water = fc_high_water_mark - 8;
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;
808         adapter->hw.fc_send_xon = 1;
809         adapter->hw.fc = adapter->hw.original_fc;
810
811         /* Allow time for pending master requests to run */
812         e1000_reset_hw(&adapter->hw);
813         if (adapter->hw.mac_type >= e1000_82544)
814                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
815
816         if (e1000_init_hw(&adapter->hw))
817                 DPRINTK(PROBE, ERR, "Hardware Error\n");
818         e1000_update_mng_vlan(adapter);
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
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);
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
853         e1000_release_manageability(adapter);
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
868 static int __devinit
869 e1000_probe(struct pci_dev *pdev,
870             const struct pci_device_id *ent)
871 {
872         struct net_device *netdev;
873         struct e1000_adapter *adapter;
874         unsigned long mmio_start, mmio_len;
875         unsigned long flash_start, flash_len;
876
877         static int cards_found = 0;
878         static int global_quad_port_a = 0; /* global ksp3 port a indication */
879         int i, err, pci_using_dac;
880         uint16_t eeprom_data = 0;
881         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
882         if ((err = pci_enable_device(pdev)))
883                 return err;
884
885         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
886             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
887                 pci_using_dac = 1;
888         } else {
889                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
890                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
891                         E1000_ERR("No usable DMA configuration, aborting\n");
892                         goto err_dma;
893                 }
894                 pci_using_dac = 0;
895         }
896
897         if ((err = pci_request_regions(pdev, e1000_driver_name)))
898                 goto err_pci_reg;
899
900         pci_set_master(pdev);
901
902         err = -ENOMEM;
903         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
904         if (!netdev)
905                 goto err_alloc_etherdev;
906
907         SET_MODULE_OWNER(netdev);
908         SET_NETDEV_DEV(netdev, &pdev->dev);
909
910         pci_set_drvdata(pdev, netdev);
911         adapter = netdev_priv(netdev);
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
920         err = -EIO;
921         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
922         if (!adapter->hw.hw_addr)
923                 goto err_ioremap;
924
925         for (i = BAR_1; i <= BAR_5; i++) {
926                 if (pci_resource_len(pdev, i) == 0)
927                         continue;
928                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
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
955         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
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
965         if ((err = e1000_sw_init(adapter)))
966                 goto err_sw_init;
967
968         err = -EIO;
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);
976                 if (!adapter->hw.flash_address)
977                         goto err_flashmap;
978         }
979
980         if (e1000_check_phy_reset_block(&adapter->hw))
981                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
982
983         if (adapter->hw.mac_type >= e1000_82543) {
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;
989                 if (adapter->hw.mac_type == e1000_ich8lan)
990                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
991         }
992
993         if ((adapter->hw.mac_type >= e1000_82544) &&
994            (adapter->hw.mac_type != e1000_82547))
995                 netdev->features |= NETIF_F_TSO;
996
997         if (adapter->hw.mac_type > e1000_82547_rev_2)
998                 netdev->features |= NETIF_F_TSO6;
999         if (pci_using_dac)
1000                 netdev->features |= NETIF_F_HIGHDMA;
1001
1002         netdev->features |= NETIF_F_LLTX;
1003
1004         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
1005
1006         /* initialize eeprom parameters */
1007
1008         if (e1000_init_eeprom_params(&adapter->hw)) {
1009                 E1000_ERR("EEPROM initialization failed\n");
1010                 goto err_eeprom;
1011         }
1012
1013         /* before reading the EEPROM, reset the controller to
1014          * put the device in a known good starting state */
1015
1016         e1000_reset_hw(&adapter->hw);
1017
1018         /* make sure the EEPROM is good */
1019
1020         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
1021                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1022                 goto err_eeprom;
1023         }
1024
1025         /* copy the MAC address out of the EEPROM */
1026
1027         if (e1000_read_mac_addr(&adapter->hw))
1028                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1029         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
1030         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
1031
1032         if (!is_valid_ether_addr(netdev->perm_addr)) {
1033                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1034                 goto err_eeprom;
1035         }
1036
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
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
1051         INIT_WORK(&adapter->reset_task, e1000_reset_task);
1052
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
1060         switch (adapter->hw.mac_type) {
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;
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;
1075         case e1000_82546:
1076         case e1000_82546_rev_3:
1077         case e1000_82571:
1078         case e1000_80003es2lan:
1079                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
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         }
1090         if (eeprom_data & eeprom_apme_mask)
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:
1109         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1110         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
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;
1124
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
1145         /* reset the hardware with the new settings */
1146         e1000_reset(adapter);
1147
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);
1155
1156         strcpy(netdev->name, "eth%d");
1157         if ((err = register_netdev(netdev)))
1158                 goto err_register;
1159
1160         /* tell the stack to leave us alone until e1000_open() is called */
1161         netif_carrier_off(netdev);
1162         netif_stop_queue(netdev);
1163
1164         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1165
1166         cards_found++;
1167         return 0;
1168
1169 err_register:
1170         e1000_release_hw_control(adapter);
1171 err_eeprom:
1172         if (!e1000_check_phy_reset_block(&adapter->hw))
1173                 e1000_phy_hw_reset(&adapter->hw);
1174
1175         if (adapter->hw.flash_address)
1176                 iounmap(adapter->hw.flash_address);
1177 err_flashmap:
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
1188 err_sw_init:
1189         iounmap(adapter->hw.hw_addr);
1190 err_ioremap:
1191         free_netdev(netdev);
1192 err_alloc_etherdev:
1193         pci_release_regions(pdev);
1194 err_pci_reg:
1195 err_dma:
1196         pci_disable_device(pdev);
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
1210 static void __devexit
1211 e1000_remove(struct pci_dev *pdev)
1212 {
1213         struct net_device *netdev = pci_get_drvdata(pdev);
1214         struct e1000_adapter *adapter = netdev_priv(netdev);
1215 #ifdef CONFIG_E1000_NAPI
1216         int i;
1217 #endif
1218
1219         flush_scheduled_work();
1220
1221         e1000_release_manageability(adapter);
1222
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);
1226
1227         unregister_netdev(netdev);
1228 #ifdef CONFIG_E1000_NAPI
1229         for (i = 0; i < adapter->num_rx_queues; i++)
1230                 dev_put(&adapter->polling_netdev[i]);
1231 #endif
1232
1233         if (!e1000_check_phy_reset_block(&adapter->hw))
1234                 e1000_phy_hw_reset(&adapter->hw);
1235
1236         kfree(adapter->tx_ring);
1237         kfree(adapter->rx_ring);
1238 #ifdef CONFIG_E1000_NAPI
1239         kfree(adapter->polling_netdev);
1240 #endif
1241
1242         iounmap(adapter->hw.hw_addr);
1243         if (adapter->hw.flash_address)
1244                 iounmap(adapter->hw.flash_address);
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
1261 static int __devinit
1262 e1000_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;
1267 #ifdef CONFIG_E1000_NAPI
1268         int i;
1269 #endif
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
1282         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1283         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
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
1290         if (e1000_set_mac_type(hw)) {
1291                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1292                 return -EIO;
1293         }
1294
1295         switch (hw->mac_type) {
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
1314         if (hw->media_type == e1000_media_type_copper) {
1315                 hw->mdix = AUTO_ALL_MODES;
1316                 hw->disable_polarity_correction = FALSE;
1317                 hw->master_slave = E1000_MASTER_SLAVE;
1318         }
1319
1320         adapter->num_tx_queues = 1;
1321         adapter->num_rx_queues = 1;
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
1329         for (i = 0; i < adapter->num_rx_queues; i++) {
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         }
1336         spin_lock_init(&adapter->tx_queue_lock);
1337 #endif
1338
1339         atomic_set(&adapter->irq_sem, 1);
1340         spin_lock_init(&adapter->stats_lock);
1341
1342         set_bit(__E1000_DOWN, &adapter->flags);
1343
1344         return 0;
1345 }
1346
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
1356 static int __devinit
1357 e1000_alloc_queues(struct e1000_adapter *adapter)
1358 {
1359         int size;
1360
1361         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1362         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1363         if (!adapter->tx_ring)
1364                 return -ENOMEM;
1365         memset(adapter->tx_ring, 0, size);
1366
1367         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
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
1376         size = sizeof(struct net_device) * adapter->num_rx_queues;
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
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
1402 static int
1403 e1000_open(struct net_device *netdev)
1404 {
1405         struct e1000_adapter *adapter = netdev_priv(netdev);
1406         int err;
1407
1408         /* disallow open during test */
1409         if (test_bit(__E1000_TESTING, &adapter->flags))
1410                 return -EBUSY;
1411
1412         /* allocate transmit descriptors */
1413         if ((err = e1000_setup_all_tx_resources(adapter)))
1414                 goto err_setup_tx;
1415
1416         /* allocate receive descriptors */
1417         if ((err = e1000_setup_all_rx_resources(adapter)))
1418                 goto err_setup_rx;
1419
1420         err = e1000_request_irq(adapter);
1421         if (err)
1422                 goto err_req_irq;
1423
1424         e1000_power_up_phy(adapter);
1425
1426         if ((err = e1000_up(adapter)))
1427                 goto err_up;
1428         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1429         if ((adapter->hw.mng_cookie.status &
1430                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1431                 e1000_update_mng_vlan(adapter);
1432         }
1433
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
1440         return E1000_SUCCESS;
1441
1442 err_up:
1443         e1000_power_down_phy(adapter);
1444         e1000_free_irq(adapter);
1445 err_req_irq:
1446         e1000_free_all_rx_resources(adapter);
1447 err_setup_rx:
1448         e1000_free_all_tx_resources(adapter);
1449 err_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
1467 static int
1468 e1000_close(struct net_device *netdev)
1469 {
1470         struct e1000_adapter *adapter = netdev_priv(netdev);
1471
1472         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1473         e1000_down(adapter);
1474         e1000_power_down_phy(adapter);
1475         e1000_free_irq(adapter);
1476
1477         e1000_free_all_tx_resources(adapter);
1478         e1000_free_all_rx_resources(adapter);
1479
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) */
1482         if ((adapter->hw.mng_cookie.status &
1483                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1484              !(adapter->vlgrp &&
1485                           adapter->vlgrp->vlan_devices[adapter->mng_vlan_id])) {
1486                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1487         }
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
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
1501  * @start: address of beginning of memory
1502  * @len: length of memory
1503  **/
1504 static boolean_t
1505 e1000_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
1511         /* First rev 82545 and 82546 need to not allow any memory
1512          * write location to cross 64k boundary due to errata 23 */
1513         if (adapter->hw.mac_type == e1000_82545 ||
1514             adapter->hw.mac_type == e1000_82546) {
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
1524  * @txdr:    tx descriptor ring (for a specific queue) to setup
1525  *
1526  * Return 0 on success, negative on failure
1527  **/
1528
1529 static int
1530 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1531                          struct e1000_tx_ring *txdr)
1532 {
1533         struct pci_dev *pdev = adapter->pdev;
1534         int size;
1535
1536         size = sizeof(struct e1000_buffer) * txdr->count;
1537         txdr->buffer_info = vmalloc(size);
1538         if (!txdr->buffer_info) {
1539                 DPRINTK(PROBE, ERR,
1540                 "Unable to allocate memory for the transmit descriptor ring\n");
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);
1551         if (!txdr->desc) {
1552 setup_tx_desc_die:
1553                 vfree(txdr->buffer_info);
1554                 DPRINTK(PROBE, ERR,
1555                 "Unable to allocate memory for the transmit descriptor ring\n");
1556                 return -ENOMEM;
1557         }
1558
1559         /* Fix for errata 23, can't cross 64kB boundary */
1560         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1561                 void *olddesc = txdr->desc;
1562                 dma_addr_t olddma = txdr->dma;
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 */
1566                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1567                 /* Failed allocation, critical failure */
1568                 if (!txdr->desc) {
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 */
1575                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1576                                             txdr->dma);
1577                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1578                         DPRINTK(PROBE, ERR,
1579                                 "Unable to allocate aligned memory "
1580                                 "for the transmit descriptor ring\n");
1581                         vfree(txdr->buffer_info);
1582                         return -ENOMEM;
1583                 } else {
1584                         /* Free old allocation, new allocation was successful */
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;
1592         spin_lock_init(&txdr->tx_lock);
1593
1594         return 0;
1595 }
1596
1597 /**
1598  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1599  *                                (Descriptors) for all queues
1600  * @adapter: board private structure
1601  *
1602  * Return 0 on success, negative on failure
1603  **/
1604
1605 int
1606 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1607 {
1608         int i, err = 0;
1609
1610         for (i = 0; i < adapter->num_tx_queues; i++) {
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);
1615                         for (i-- ; i >= 0; i--)
1616                                 e1000_free_tx_resources(adapter,
1617                                                         &adapter->tx_ring[i]);
1618                         break;
1619                 }
1620         }
1621
1622         return err;
1623 }
1624
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
1632 static void
1633 e1000_configure_tx(struct e1000_adapter *adapter)
1634 {
1635         uint64_t tdba;
1636         struct e1000_hw *hw = &adapter->hw;
1637         uint32_t tdlen, tctl, tipg, tarc;
1638         uint32_t ipgr1, ipgr2;
1639
1640         /* Setup the HW Tx Head and Tail descriptor pointers */
1641
1642         switch (adapter->num_tx_queues) {
1643         case 1:
1644         default:
1645                 tdba = adapter->tx_ring[0].dma;
1646                 tdlen = adapter->tx_ring[0].count *
1647                         sizeof(struct e1000_tx_desc);
1648                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1649                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1650                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1651                 E1000_WRITE_REG(hw, TDT, 0);
1652                 E1000_WRITE_REG(hw, TDH, 0);
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);
1655                 break;
1656         }
1657
1658         /* Set the default values for the Tx Inter Packet Gap timer */
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))
1662                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1663         else
1664                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1665
1666         switch (hw->mac_type) {
1667         case e1000_82542_rev2_0:
1668         case e1000_82542_rev2_1:
1669                 tipg = DEFAULT_82542_TIPG_IPGT;
1670                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1671                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1672                 break;
1673         case e1000_80003es2lan:
1674                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1675                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1676                 break;
1677         default:
1678                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1679                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1680                 break;
1681         }
1682         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1683         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1684         E1000_WRITE_REG(hw, TIPG, tipg);
1685
1686         /* Set the Tx Interrupt Delay register */
1687
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);
1691
1692         /* Program the Transmit Control Register */
1693
1694         tctl = E1000_READ_REG(hw, TCTL);
1695         tctl &= ~E1000_TCTL_CT;
1696         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1697                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1698
1699         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1700                 tarc = E1000_READ_REG(hw, TARC0);
1701                 /* set the speed mode bit, we'll clear it if we're not at
1702                  * gigabit link later */
1703                 tarc |= (1 << 21);
1704                 E1000_WRITE_REG(hw, TARC0, tarc);
1705         } else if (hw->mac_type == e1000_80003es2lan) {
1706                 tarc = E1000_READ_REG(hw, TARC0);
1707                 tarc |= 1;
1708                 E1000_WRITE_REG(hw, TARC0, tarc);
1709                 tarc = E1000_READ_REG(hw, TARC1);
1710                 tarc |= 1;
1711                 E1000_WRITE_REG(hw, TARC1, tarc);
1712         }
1713
1714         e1000_config_collision_dist(hw);
1715
1716         /* Setup Transmit Descriptor Settings for eop descriptor */
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;
1722
1723         if (hw->mac_type < e1000_82543)
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. */
1730         if (hw->mac_type == e1000_82544 &&
1731             hw->bus_type == e1000_bus_type_pcix)
1732                 adapter->pcix_82544 = 1;
1733
1734         E1000_WRITE_REG(hw, TCTL, tctl);
1735
1736 }
1737
1738 /**
1739  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1740  * @adapter: board private structure
1741  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1742  *
1743  * Returns 0 on success, negative on failure
1744  **/
1745
1746 static int
1747 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1748                          struct e1000_rx_ring *rxdr)
1749 {
1750         struct pci_dev *pdev = adapter->pdev;
1751         int size, desc_len;
1752
1753         size = sizeof(struct e1000_buffer) * rxdr->count;
1754         rxdr->buffer_info = vmalloc(size);
1755         if (!rxdr->buffer_info) {
1756                 DPRINTK(PROBE, ERR,
1757                 "Unable to allocate memory for the receive descriptor ring\n");
1758                 return -ENOMEM;
1759         }
1760         memset(rxdr->buffer_info, 0, size);
1761
1762         size = sizeof(struct e1000_ps_page) * rxdr->count;
1763         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1764         if (!rxdr->ps_page) {
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);
1774         if (!rxdr->ps_page_dma) {
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
1783         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1784                 desc_len = sizeof(struct e1000_rx_desc);
1785         else
1786                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1787
1788         /* Round up to nearest 4K */
1789
1790         rxdr->size = rxdr->count * desc_len;
1791         E1000_ROUNDUP(rxdr->size, 4096);
1792
1793         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1794
1795         if (!rxdr->desc) {
1796                 DPRINTK(PROBE, ERR,
1797                 "Unable to allocate memory for the receive descriptor ring\n");
1798 setup_rx_desc_die:
1799                 vfree(rxdr->buffer_info);
1800                 kfree(rxdr->ps_page);
1801                 kfree(rxdr->ps_page_dma);
1802                 return -ENOMEM;
1803         }
1804
1805         /* Fix for errata 23, can't cross 64kB boundary */
1806         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1807                 void *olddesc = rxdr->desc;
1808                 dma_addr_t olddma = rxdr->dma;
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 */
1812                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1813                 /* Failed allocation, critical failure */
1814                 if (!rxdr->desc) {
1815                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1816                         DPRINTK(PROBE, ERR,
1817                                 "Unable to allocate memory "
1818                                 "for the receive descriptor ring\n");
1819                         goto setup_rx_desc_die;
1820                 }
1821
1822                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1823                         /* give up */
1824                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1825                                             rxdr->dma);
1826                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1827                         DPRINTK(PROBE, ERR,
1828                                 "Unable to allocate aligned memory "
1829                                 "for the receive descriptor ring\n");
1830                         goto setup_rx_desc_die;
1831                 } else {
1832                         /* Free old allocation, new allocation was successful */
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
1844 /**
1845  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1846  *                                (Descriptors) for all queues
1847  * @adapter: board private structure
1848  *
1849  * Return 0 on success, negative on failure
1850  **/
1851
1852 int
1853 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1854 {
1855         int i, err = 0;
1856
1857         for (i = 0; i < adapter->num_rx_queues; i++) {
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);
1862                         for (i-- ; i >= 0; i--)
1863                                 e1000_free_rx_resources(adapter,
1864                                                         &adapter->rx_ring[i]);
1865                         break;
1866                 }
1867         }
1868
1869         return err;
1870 }
1871
1872 /**
1873  * e1000_setup_rctl - configure the receive control registers
1874  * @adapter: Board private structure
1875  **/
1876 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1877                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1878 static void
1879 e1000_setup_rctl(struct e1000_adapter *adapter)
1880 {
1881         uint32_t rctl, rfctl;
1882         uint32_t psrctl = 0;
1883 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1884         uint32_t pages = 0;
1885 #endif
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
1895         if (adapter->hw.tbi_compatibility_on == 1)
1896                 rctl |= E1000_RCTL_SBP;
1897         else
1898                 rctl &= ~E1000_RCTL_SBP;
1899
1900         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1901                 rctl &= ~E1000_RCTL_LPE;
1902         else
1903                 rctl |= E1000_RCTL_LPE;
1904
1905         /* Setup buffer sizes */
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;
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;
1935         }
1936
1937 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
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          */
1945         /* allocations using alloc_page take too long for regular MTU
1946          * so only enable packet split for jumbo frames */
1947         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1948         if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
1949             PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
1950                 adapter->rx_ps_pages = pages;
1951         else
1952                 adapter->rx_ps_pages = 0;
1953 #endif
1954         if (adapter->rx_ps_pages) {
1955                 /* Configure extra packet-split registers */
1956                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1957                 rfctl |= E1000_RFCTL_EXTEN;
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
1963                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1964
1965                 rctl |= E1000_RCTL_DTYP_PS;
1966
1967                 psrctl |= adapter->rx_ps_bsize0 >>
1968                         E1000_PSRCTL_BSIZE0_SHIFT;
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                 }
1982
1983                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
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
1996 static void
1997 e1000_configure_rx(struct e1000_adapter *adapter)
1998 {
1999         uint64_t rdba;
2000         struct e1000_hw *hw = &adapter->hw;
2001         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
2002
2003         if (adapter->rx_ps_pages) {
2004                 /* this is a 32 byte descriptor */
2005                 rdlen = adapter->rx_ring[0].count *
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 {
2010                 rdlen = adapter->rx_ring[0].count *
2011                         sizeof(struct e1000_rx_desc);
2012                 adapter->clean_rx = e1000_clean_rx_irq;
2013                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2014         }
2015
2016         /* disable receives while setting up the descriptors */
2017         rctl = E1000_READ_REG(hw, RCTL);
2018         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
2019
2020         /* set the Receive Delay Timer Register */
2021         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
2022
2023         if (hw->mac_type >= e1000_82540) {
2024                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
2025                 if (adapter->itr_setting != 0)
2026                         E1000_WRITE_REG(hw, ITR,
2027                                 1000000000 / (adapter->itr * 256));
2028         }
2029
2030         if (hw->mac_type >= e1000_82571) {
2031                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
2032                 /* Reset delay timers after every interrupt */
2033                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2034 #ifdef CONFIG_E1000_NAPI
2035                 /* Auto-Mask interrupts upon ICR access */
2036                 ctrl_ext |= E1000_CTRL_EXT_IAME;
2037                 E1000_WRITE_REG(hw, IAM, 0xffffffff);
2038 #endif
2039                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
2040                 E1000_WRITE_FLUSH(hw);
2041         }
2042
2043         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2044          * the Base and Length of the Rx Descriptor Ring */
2045         switch (adapter->num_rx_queues) {
2046         case 1:
2047         default:
2048                 rdba = adapter->rx_ring[0].dma;
2049                 E1000_WRITE_REG(hw, RDLEN, rdlen);
2050                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
2051                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
2052                 E1000_WRITE_REG(hw, RDT, 0);
2053                 E1000_WRITE_REG(hw, RDH, 0);
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);
2056                 break;
2057         }
2058
2059         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2060         if (hw->mac_type >= e1000_82543) {
2061                 rxcsum = E1000_READ_REG(hw, RXCSUM);
2062                 if (adapter->rx_csum == TRUE) {
2063                         rxcsum |= E1000_RXCSUM_TUOFL;
2064
2065                         /* Enable 82571 IPv4 payload checksum for UDP fragments
2066                          * Must be used in conjunction with packet-split. */
2067                         if ((hw->mac_type >= e1000_82571) &&
2068                             (adapter->rx_ps_pages)) {
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                 }
2075                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
2076         }
2077
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
2084         /* Enable Receives */
2085         E1000_WRITE_REG(hw, RCTL, rctl);
2086 }
2087
2088 /**
2089  * e1000_free_tx_resources - Free Tx Resources per Queue
2090  * @adapter: board private structure
2091  * @tx_ring: Tx descriptor ring for a specific queue
2092  *
2093  * Free all transmit software resources
2094  **/
2095
2096 static void
2097 e1000_free_tx_resources(struct e1000_adapter *adapter,
2098                         struct e1000_tx_ring *tx_ring)
2099 {
2100         struct pci_dev *pdev = adapter->pdev;
2101
2102         e1000_clean_tx_ring(adapter, tx_ring);
2103
2104         vfree(tx_ring->buffer_info);
2105         tx_ring->buffer_info = NULL;
2106
2107         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2108
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
2119 void
2120 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2121 {
2122         int i;
2123
2124         for (i = 0; i < adapter->num_tx_queues; i++)
2125                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2126 }
2127
2128 static void
2129 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2130                         struct e1000_buffer *buffer_info)
2131 {
2132         if (buffer_info->dma) {
2133                 pci_unmap_page(adapter->pdev,
2134                                 buffer_info->dma,
2135                                 buffer_info->length,
2136                                 PCI_DMA_TODEVICE);
2137                 buffer_info->dma = 0;
2138         }
2139         if (buffer_info->skb) {
2140                 dev_kfree_skb_any(buffer_info->skb);
2141                 buffer_info->skb = NULL;
2142         }
2143         /* buffer_info must be completely set up in the transmit path */
2144 }
2145
2146 /**
2147  * e1000_clean_tx_ring - Free Tx Buffers
2148  * @adapter: board private structure
2149  * @tx_ring: ring to be cleaned
2150  **/
2151
2152 static void
2153 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2154                     struct e1000_tx_ring *tx_ring)
2155 {
2156         struct e1000_buffer *buffer_info;
2157         unsigned long size;
2158         unsigned int i;
2159
2160         /* Free all the Tx ring sk_buffs */
2161
2162         for (i = 0; i < tx_ring->count; i++) {
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;
2176         tx_ring->last_tx_tso = 0;
2177
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
2187 static void
2188 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2189 {
2190         int i;
2191
2192         for (i = 0; i < adapter->num_tx_queues; i++)
2193                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2194 }
2195
2196 /**
2197  * e1000_free_rx_resources - Free Rx Resources
2198  * @adapter: board private structure
2199  * @rx_ring: ring to clean the resources from
2200  *
2201  * Free all receive software resources
2202  **/
2203
2204 static void
2205 e1000_free_rx_resources(struct e1000_adapter *adapter,
2206                         struct e1000_rx_ring *rx_ring)
2207 {
2208         struct pci_dev *pdev = adapter->pdev;
2209
2210         e1000_clean_rx_ring(adapter, rx_ring);
2211
2212         vfree(rx_ring->buffer_info);
2213         rx_ring->buffer_info = NULL;
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;
2218
2219         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2220
2221         rx_ring->desc = NULL;
2222 }
2223
2224 /**
2225  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2226  * @adapter: board private structure
2227  *
2228  * Free all receive software resources
2229  **/
2230
2231 void
2232 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2233 {
2234         int i;
2235
2236         for (i = 0; i < adapter->num_rx_queues; i++)
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
2244  **/
2245
2246 static void
2247 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2248                     struct e1000_rx_ring *rx_ring)
2249 {
2250         struct e1000_buffer *buffer_info;
2251         struct e1000_ps_page *ps_page;
2252         struct e1000_ps_page_dma *ps_page_dma;
2253         struct pci_dev *pdev = adapter->pdev;
2254         unsigned long size;
2255         unsigned int i, j;
2256
2257         /* Free all the Rx ring sk_buffs */
2258         for (i = 0; i < rx_ring->count; i++) {
2259                 buffer_info = &rx_ring->buffer_info[i];
2260                 if (buffer_info->skb) {
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;
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;
2279                 }
2280         }
2281
2282         size = sizeof(struct e1000_buffer) * rx_ring->count;
2283         memset(rx_ring->buffer_info, 0, size);
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);
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
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
2305 static void
2306 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2307 {
2308         int i;
2309
2310         for (i = 0; i < adapter->num_rx_queues; i++)
2311                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
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  */
2317 static void
2318 e1000_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
2331         if (netif_running(netdev))
2332                 e1000_clean_all_rx_rings(adapter);
2333 }
2334
2335 static void
2336 e1000_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
2347         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2348                 e1000_pci_set_mwi(&adapter->hw);
2349
2350         if (netif_running(netdev)) {
2351                 /* No need to loop, because 82542 supports only 1 queue */
2352                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2353                 e1000_configure_rx(adapter);
2354                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
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
2366 static int
2367 e1000_set_mac(struct net_device *netdev, void *p)
2368 {
2369         struct e1000_adapter *adapter = netdev_priv(netdev);
2370         struct sockaddr *addr = p;
2371
2372         if (!is_valid_ether_addr(addr->sa_data))
2373                 return -EADDRNOTAVAIL;
2374
2375         /* 82542 2.0 needs to be in reset to write receive address registers */
2376
2377         if (adapter->hw.mac_type == e1000_82542_rev2_0)
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
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
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
2394                  * of the RARs and no incoming packets directed to this port
2395                  * are dropped. Eventaully the LAA will be in RAR[0] and
2396                  * RAR[14] */
2397                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2398                                         E1000_RAR_ENTRIES - 1);
2399         }
2400
2401         if (adapter->hw.mac_type == e1000_82542_rev2_0)
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
2417 static void
2418 e1000_set_multi(struct net_device *netdev)
2419 {
2420         struct e1000_adapter *adapter = netdev_priv(netdev);
2421         struct e1000_hw *hw = &adapter->hw;
2422         struct dev_mc_list *mc_ptr;
2423         uint32_t rctl;
2424         uint32_t hash_value;
2425         int i, rar_entries = E1000_RAR_ENTRIES;
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;
2432
2433         /* reserve RAR[14] for LAA over-write work-around */
2434         if (adapter->hw.mac_type == e1000_82571)
2435                 rar_entries--;
2436
2437         /* Check for Promiscuous and All Multicast modes */
2438
2439         rctl = E1000_READ_REG(hw, RCTL);
2440
2441         if (netdev->flags & IFF_PROMISC) {
2442                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2443         } else if (netdev->flags & IFF_ALLMULTI) {
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
2454         if (hw->mac_type == e1000_82542_rev2_0)
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
2460          * -- with 82571 controllers only 0-13 entries are filled here
2461          */
2462         mc_ptr = netdev->mc_list;
2463
2464         for (i = 1; i < rar_entries; i++) {
2465                 if (mc_ptr) {
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);
2470                         E1000_WRITE_FLUSH(hw);
2471                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2472                         E1000_WRITE_FLUSH(hw);
2473                 }
2474         }
2475
2476         /* clear the old settings from the multicast hash table */
2477
2478         for (i = 0; i < mta_reg_count; i++) {
2479                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2480                 E1000_WRITE_FLUSH(hw);
2481         }
2482
2483         /* load any remaining addresses into the hash table */
2484
2485         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2486                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2487                 e1000_mta_set(hw, hash_value);
2488         }
2489
2490         if (hw->mac_type == e1000_82542_rev2_0)
2491                 e1000_leave_82542_rst(adapter);
2492 }
2493
2494 /* Need to wait a few seconds after link up to get diagnostic information from
2495  * the phy */
2496
2497 static void
2498 e1000_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
2509 static void
2510 e1000_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
2516         if (atomic_read(&adapter->tx_fifo_stall)) {
2517                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
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  **/
2550 static void
2551 e1000_watchdog(unsigned long data)
2552 {
2553         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2554         struct net_device *netdev = adapter->netdev;
2555         struct e1000_tx_ring *txdr = adapter->tx_ring;
2556         uint32_t link, tctl;
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         }
2567
2568         if (adapter->hw.mac_type == e1000_82573) {
2569                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2570                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2571                         e1000_update_mng_vlan(adapter);
2572         }
2573
2574         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
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
2580         if (link) {
2581                 if (!netif_carrier_ok(netdev)) {
2582                         uint32_t ctrl;
2583                         boolean_t txb2b = 1;
2584                         e1000_get_speed_and_duplex(&adapter->hw,
2585                                                    &adapter->link_speed,
2586                                                    &adapter->link_duplex);
2587
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" )));
2598
2599                         /* tweak tx_queue_len according to speed/duplex
2600                          * and adjust the timeout factor */
2601                         netdev->tx_queue_len = adapter->tx_queue_len;
2602                         adapter->tx_timeout_factor = 1;
2603                         switch (adapter->link_speed) {
2604                         case SPEED_10:
2605                                 txb2b = 0;
2606                                 netdev->tx_queue_len = 10;
2607                                 adapter->tx_timeout_factor = 8;
2608                                 break;
2609                         case SPEED_100:
2610                                 txb2b = 0;
2611                                 netdev->tx_queue_len = 100;
2612                                 /* maybe add some timeout factor ? */
2613                                 break;
2614                         }
2615
2616                         if ((adapter->hw.mac_type == e1000_82571 ||
2617                              adapter->hw.mac_type == e1000_82572) &&
2618                             txb2b == 0) {
2619                                 uint32_t tarc0;
2620                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2621                                 tarc0 &= ~(1 << 21);
2622                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2623                         }
2624
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){
2629                                 switch (adapter->link_speed) {
2630                                 case SPEED_10:
2631                                 case SPEED_100:
2632                                         DPRINTK(PROBE,INFO,
2633                                         "10/100 speed: disabling TSO\n");
2634                                         netdev->features &= ~NETIF_F_TSO;
2635                                         netdev->features &= ~NETIF_F_TSO6;
2636                                         break;
2637                                 case SPEED_1000:
2638                                         netdev->features |= NETIF_F_TSO;
2639                                         netdev->features |= NETIF_F_TSO6;
2640                                         break;
2641                                 default:
2642                                         /* oops */
2643                                         break;
2644                                 }
2645                         }
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);
2652
2653                         netif_carrier_on(netdev);
2654                         netif_wake_queue(netdev);
2655                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2656                         adapter->smartspeed = 0;
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                         }
2664                 }
2665         } else {
2666                 if (netif_carrier_ok(netdev)) {
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);
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                          */
2679                         if (adapter->hw.mac_type == e1000_80003es2lan)
2680                                 /* reset device */
2681                                 schedule_work(&adapter->reset_task);
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
2701         if (!netif_carrier_ok(netdev)) {
2702                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
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). */
2707                         adapter->tx_timeout_count++;
2708                         schedule_work(&adapter->reset_task);
2709                 }
2710         }
2711
2712         /* Cause software interrupt to ensure rx ring is cleaned */
2713         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2714
2715         /* Force detection of hung controller every watchdog period */
2716         adapter->detect_tx_hung = TRUE;
2717
2718         /* With 82571 controllers, LAA may be overwritten due to controller
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
2723         /* Reset the timer */
2724         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2725 }
2726
2727 enum 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  **/
2750 static 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
2764         switch (itr_setting) {
2765         case lowest_latency:
2766                 /* jumbo frames get bulk treatment*/
2767                 if (bytes/packets > 8000)
2768                         retval = bulk_latency;
2769                 else if ((packets < 5) && (bytes > 512))
2770                         retval = low_latency;
2771                 break;
2772         case low_latency:  /* 50 usec aka 20000 ints/s */
2773                 if (bytes > 10000) {
2774                         /* jumbo frames need bulk latency setting */
2775                         if (bytes/packets > 8000)
2776                                 retval = bulk_latency;
2777                         else if ((packets < 10) || ((bytes/packets) > 1200))
2778                                 retval = bulk_latency;
2779                         else if ((packets > 35))
2780                                 retval = lowest_latency;
2781                 } else if (bytes/packets > 2000)
2782                         retval = bulk_latency;
2783                 else if (packets <= 2 && bytes < 512)
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;
2790                 } else if (bytes < 6000) {
2791                         retval = low_latency;
2792                 }
2793                 break;
2794         }
2795
2796 update_itr_done:
2797         return retval;
2798 }
2799
2800 static 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);
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
2824         adapter->rx_itr = e1000_update_itr(adapter,
2825                                     adapter->rx_itr,
2826                                     adapter->total_rx_packets,
2827                                     adapter->total_rx_bytes);
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;
2831
2832         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2833
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
2849 set_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
2864 #define E1000_TX_FLAGS_CSUM             0x00000001
2865 #define E1000_TX_FLAGS_VLAN             0x00000002
2866 #define E1000_TX_FLAGS_TSO              0x00000004
2867 #define E1000_TX_FLAGS_IPV4             0x00000008
2868 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2869 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2870
2871 static int
2872 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2873           struct sk_buff *skb)
2874 {
2875         struct e1000_context_desc *context_desc;
2876         struct e1000_buffer *buffer_info;
2877         unsigned int i;
2878         uint32_t cmd_length = 0;
2879         uint16_t ipcse = 0, tucse, mss;
2880         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2881         int err;
2882
2883         if (skb_is_gso(skb)) {
2884                 if (skb_header_cloned(skb)) {
2885                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2886                         if (err)
2887                                 return err;
2888                 }
2889
2890                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2891                 mss = skb_shinfo(skb)->gso_size;
2892                 if (skb->protocol == htons(ETH_P_IP)) {
2893                         skb->nh.iph->tot_len = 0;
2894                         skb->nh.iph->check = 0;
2895                         skb->h.th->check =
2896                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2897                                                    skb->nh.iph->daddr,
2898                                                    0,
2899                                                    IPPROTO_TCP,
2900                                                    0);
2901                         cmd_length = E1000_TXD_CMD_IP;
2902                         ipcse = skb->h.raw - skb->data - 1;
2903                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2904                         skb->nh.ipv6h->payload_len = 0;
2905                         skb->h.th->check =
2906                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2907                                                  &skb->nh.ipv6h->daddr,
2908                                                  0,
2909                                                  IPPROTO_TCP,
2910                                                  0);
2911                         ipcse = 0;
2912                 }
2913                 ipcss = skb->nh.raw - skb->data;
2914                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2915                 tucss = skb->h.raw - skb->data;
2916                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2917                 tucse = 0;
2918
2919                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2920                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2921
2922                 i = tx_ring->next_to_use;
2923                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2924                 buffer_info = &tx_ring->buffer_info[i];
2925
2926                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2927                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2928                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2929                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2930                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2931                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2932                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2933                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2934                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2935
2936                 buffer_info->time_stamp = jiffies;
2937                 buffer_info->next_to_watch = i;
2938
2939                 if (++i == tx_ring->count) i = 0;
2940                 tx_ring->next_to_use = i;
2941
2942                 return TRUE;
2943         }
2944         return FALSE;
2945 }
2946
2947 static boolean_t
2948 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2949               struct sk_buff *skb)
2950 {
2951         struct e1000_context_desc *context_desc;
2952         struct e1000_buffer *buffer_info;
2953         unsigned int i;
2954         uint8_t css;
2955
2956         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2957                 css = skb->h.raw - skb->data;
2958
2959                 i = tx_ring->next_to_use;
2960                 buffer_info = &tx_ring->buffer_info[i];
2961                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2962
2963                 context_desc->lower_setup.ip_config = 0;
2964                 context_desc->upper_setup.tcp_fields.tucss = css;
2965                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2966                 context_desc->upper_setup.tcp_fields.tucse = 0;
2967                 context_desc->tcp_seg_setup.data = 0;
2968                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2969
2970                 buffer_info->time_stamp = jiffies;
2971                 buffer_info->next_to_watch = i;
2972
2973                 if (unlikely(++i == tx_ring->count)) i = 0;
2974                 tx_ring->next_to_use = i;
2975
2976                 return TRUE;
2977         }
2978
2979         return FALSE;
2980 }
2981
2982 #define E1000_MAX_TXD_PWR       12
2983 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2984
2985 static int
2986 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2987              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2988              unsigned int nr_frags, unsigned int mss)
2989 {
2990         struct e1000_buffer *buffer_info;
2991         unsigned int len = skb->len;
2992         unsigned int offset = 0, size, count = 0, i;
2993         unsigned int f;
2994         len -= skb->data_len;
2995
2996         i = tx_ring->next_to_use;
2997
2998         while (len) {
2999                 buffer_info = &tx_ring->buffer_info[i];
3000                 size = min(len, max_per_txd);
3001                 /* Workaround for Controller erratum --
3002                  * descriptor for non-tso packet in a linear SKB that follows a
3003                  * tso gets written back prematurely before the data is fully
3004                  * DMA'd to the controller */
3005                 if (!skb->data_len && tx_ring->last_tx_tso &&
3006                     !skb_is_gso(skb)) {
3007                         tx_ring->last_tx_tso = 0;
3008                         size -= 4;
3009                 }
3010
3011                 /* Workaround for premature desc write-backs
3012                  * in TSO mode.  Append 4-byte sentinel desc */
3013                 if (unlikely(mss && !nr_frags && size == len && size > 8))
3014                         size -= 4;
3015                 /* work-around for errata 10 and it applies
3016                  * to all controllers in PCI-X mode
3017                  * The fix is to make sure that the first descriptor of a
3018                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3019                  */
3020                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3021                                 (size > 2015) && count == 0))
3022                         size = 2015;
3023
3024                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
3025                  * terminating buffers within evenly-aligned dwords. */
3026                 if (unlikely(adapter->pcix_82544 &&
3027                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3028                    size > 4))
3029                         size -= 4;
3030
3031                 buffer_info->length = size;
3032                 buffer_info->dma =
3033                         pci_map_single(adapter->pdev,
3034                                 skb->data + offset,
3035                                 size,
3036                                 PCI_DMA_TODEVICE);
3037                 buffer_info->time_stamp = jiffies;
3038                 buffer_info->next_to_watch = i;
3039
3040                 len -= size;
3041                 offset += size;
3042                 count++;
3043                 if (unlikely(++i == tx_ring->count)) i = 0;
3044         }
3045
3046         for (f = 0; f < nr_frags; f++) {
3047                 struct skb_frag_struct *frag;
3048
3049                 frag = &skb_shinfo(skb)->frags[f];
3050                 len = frag->size;
3051                 offset = frag->page_offset;
3052
3053                 while (len) {
3054                         buffer_info = &tx_ring->buffer_info[i];
3055                         size = min(len, max_per_txd);
3056                         /* Workaround for premature desc write-backs
3057                          * in TSO mode.  Append 4-byte sentinel desc */
3058                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3059                                 size -= 4;
3060                         /* Workaround for potential 82544 hang in PCI-X.
3061                          * Avoid terminating buffers within evenly-aligned
3062                          * dwords. */
3063                         if (unlikely(adapter->pcix_82544 &&
3064                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
3065                            size > 4))
3066                                 size -= 4;
3067
3068                         buffer_info->length = size;
3069                         buffer_info->dma =
3070                                 pci_map_page(adapter->pdev,
3071                                         frag->page,
3072                                         offset,
3073                                         size,
3074                                         PCI_DMA_TODEVICE);
3075                         buffer_info->time_stamp = jiffies;
3076                         buffer_info->next_to_watch = i;
3077
3078                         len -= size;
3079                         offset += size;
3080                         count++;
3081                         if (unlikely(++i == tx_ring->count)) i = 0;
3082                 }
3083         }
3084
3085         i = (i == 0) ? tx_ring->count - 1 : i - 1;
3086         tx_ring->buffer_info[i].skb = skb;
3087         tx_ring->buffer_info[first].next_to_watch = i;
3088
3089         return count;
3090 }
3091
3092 static void
3093 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3094                int tx_flags, int count)
3095 {
3096         struct e1000_tx_desc *tx_desc = NULL;
3097         struct e1000_buffer *buffer_info;
3098         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3099         unsigned int i;
3100
3101         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3102                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3103                              E1000_TXD_CMD_TSE;
3104                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3105
3106                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3107                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3108         }
3109
3110         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3111                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3112                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3113         }
3114
3115         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3116                 txd_lower |= E1000_TXD_CMD_VLE;
3117                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3118         }
3119
3120         i = tx_ring->next_to_use;
3121
3122         while (count--) {
3123                 buffer_info = &tx_ring->buffer_info[i];
3124                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3125                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3126                 tx_desc->lower.data =
3127                         cpu_to_le32(txd_lower | buffer_info->length);
3128                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3129                 if (unlikely(++i == tx_ring->count)) i = 0;
3130         }
3131
3132         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3133
3134         /* Force memory writes to complete before letting h/w
3135          * know there are new descriptors to fetch.  (Only
3136          * applicable for weak-ordered memory model archs,
3137          * such as IA-64). */
3138         wmb();
3139
3140         tx_ring->next_to_use = i;
3141         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
3142         /* we need this if more than one processor can write to our tail
3143          * at a time, it syncronizes IO on IA64/Altix systems */
3144         mmiowb();
3145 }
3146
3147 /**
3148  * 82547 workaround to avoid controller hang in half-duplex environment.
3149  * The workaround is to avoid queuing a large packet that would span
3150  * the internal Tx FIFO ring boundary by notifying the stack to resend
3151  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3152  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3153  * to the beginning of the Tx FIFO.
3154  **/
3155
3156 #define E1000_FIFO_HDR                  0x10
3157 #define E1000_82547_PAD_LEN             0x3E0
3158
3159 static int
3160 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3161 {
3162         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3163         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3164
3165         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
3166
3167         if (adapter->link_duplex != HALF_DUPLEX)
3168                 goto no_fifo_stall_required;
3169
3170         if (atomic_read(&adapter->tx_fifo_stall))
3171                 return 1;
3172
3173         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3174                 atomic_set(&adapter->tx_fifo_stall, 1);
3175                 return 1;
3176         }
3177
3178 no_fifo_stall_required:
3179         adapter->tx_fifo_head += skb_fifo_len;
3180         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3181                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3182         return 0;
3183 }
3184
3185 #define MINIMUM_DHCP_PACKET_SIZE 282
3186 static int
3187 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3188 {
3189         struct e1000_hw *hw =  &adapter->hw;
3190         uint16_t length, offset;
3191         if (vlan_tx_tag_present(skb)) {
3192                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
3193                         ( adapter->hw.mng_cookie.status &
3194                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3195                         return 0;
3196         }
3197         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3198                 struct ethhdr *eth = (struct ethhdr *) skb->data;
3199                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3200                         const struct iphdr *ip =
3201                                 (struct iphdr *)((uint8_t *)skb->data+14);
3202                         if (IPPROTO_UDP == ip->protocol) {
3203                                 struct udphdr *udp =
3204                                         (struct udphdr *)((uint8_t *)ip +
3205                                                 (ip->ihl << 2));
3206                                 if (ntohs(udp->dest) == 67) {
3207                                         offset = (uint8_t *)udp + 8 - skb->data;
3208                                         length = skb->len - offset;
3209
3210                                         return e1000_mng_write_dhcp_info(hw,
3211                                                         (uint8_t *)udp + 8,
3212                                                         length);
3213                                 }
3214                         }
3215                 }
3216         }
3217         return 0;
3218 }
3219
3220 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3221 {
3222         struct e1000_adapter *adapter = netdev_priv(netdev);
3223         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3224
3225         netif_stop_queue(netdev);
3226         /* Herbert's original patch had:
3227          *  smp_mb__after_netif_stop_queue();
3228          * but since that doesn't exist yet, just open code it. */
3229         smp_mb();
3230
3231         /* We need to check again in a case another CPU has just
3232          * made room available. */
3233         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3234                 return -EBUSY;
3235
3236         /* A reprieve! */
3237         netif_start_queue(netdev);
3238         ++adapter->restart_queue;
3239         return 0;
3240 }
3241
3242 static int e1000_maybe_stop_tx(struct net_device *netdev,
3243                                struct e1000_tx_ring *tx_ring, int size)
3244 {
3245         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3246                 return 0;
3247         return __e1000_maybe_stop_tx(netdev, size);
3248 }
3249
3250 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3251 static int
3252 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3253 {
3254         struct e1000_adapter *adapter = netdev_priv(netdev);
3255         struct e1000_tx_ring *tx_ring;
3256         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3257         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3258         unsigned int tx_flags = 0;
3259         unsigned int len = skb->len;
3260         unsigned long flags;
3261         unsigned int nr_frags = 0;
3262         unsigned int mss = 0;
3263         int count = 0;
3264         int tso;
3265         unsigned int f;
3266         len -= skb->data_len;
3267
3268         /* This goes back to the question of how to logically map a tx queue
3269          * to a flow.  Right now, performance is impacted slightly negatively
3270          * if using multiple tx queues.  If the stack breaks away from a
3271          * single qdisc implementation, we can look at this again. */
3272         tx_ring = adapter->tx_ring;
3273
3274         if (unlikely(skb->len <= 0)) {
3275                 dev_kfree_skb_any(skb);
3276                 return NETDEV_TX_OK;
3277         }
3278
3279         /* 82571 and newer doesn't need the workaround that limited descriptor
3280          * length to 4kB */
3281         if (adapter->hw.mac_type >= e1000_82571)
3282                 max_per_txd = 8192;
3283
3284         mss = skb_shinfo(skb)->gso_size;
3285         /* The controller does a simple calculation to
3286          * make sure there is enough room in the FIFO before
3287          * initiating the DMA for each buffer.  The calc is:
3288          * 4 = ceil(buffer len/mss).  To make sure we don't
3289          * overrun the FIFO, adjust the max buffer len if mss
3290          * drops. */
3291         if (mss) {
3292                 uint8_t hdr_len;
3293                 max_per_txd = min(mss << 2, max_per_txd);
3294                 max_txd_pwr = fls(max_per_txd) - 1;
3295
3296                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3297                 * points to just header, pull a few bytes of payload from
3298                 * frags into skb->data */
3299                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
3300                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
3301                         switch (adapter->hw.mac_type) {
3302                                 unsigned int pull_size;
3303                         case e1000_82544:
3304                                 /* Make sure we have room to chop off 4 bytes,
3305                                  * and that the end alignment will work out to
3306                                  * this hardware's requirements
3307                                  * NOTE: this is a TSO only workaround
3308                                  * if end byte alignment not correct move us
3309                                  * into the next dword */
3310                                 if ((unsigned long)(skb->tail - 1) & 4)
3311                                         break;
3312                                 /* fall through */
3313                         case e1000_82571:
3314                         case e1000_82572:
3315                         case e1000_82573:
3316                         case e1000_ich8lan:
3317                                 pull_size = min((unsigned int)4, skb->data_len);
3318                                 if (!__pskb_pull_tail(skb, pull_size)) {
3319                                         DPRINTK(DRV, ERR,
3320                                                 "__pskb_pull_tail failed.\n");
3321                                         dev_kfree_skb_any(skb);
3322                                         return NETDEV_TX_OK;
3323                                 }
3324                                 len = skb->len - skb->data_len;
3325                                 break;
3326                         default:
3327                                 /* do nothing */
3328                                 break;
3329                         }
3330                 }
3331         }
3332
3333         /* reserve a descriptor for the offload context */
3334         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3335                 count++;
3336         count++;
3337
3338         /* Controller Erratum workaround */
3339         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3340                 count++;
3341
3342         count += TXD_USE_COUNT(len, max_txd_pwr);
3343
3344         if (adapter->pcix_82544)
3345                 count++;
3346
3347         /* work-around for errata 10 and it applies to all controllers
3348          * in PCI-X mode, so add one more descriptor to the count
3349          */
3350         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3351                         (len > 2015)))
3352                 count++;
3353
3354         nr_frags = skb_shinfo(skb)->nr_frags;
3355         for (f = 0; f < nr_frags; f++)
3356                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3357                                        max_txd_pwr);
3358         if (adapter->pcix_82544)
3359                 count += nr_frags;
3360
3361
3362         if (adapter->hw.tx_pkt_filtering &&
3363             (adapter->hw.mac_type == e1000_82573))
3364                 e1000_transfer_dhcp_info(adapter, skb);
3365
3366         local_irq_save(flags);
3367         if (!spin_trylock(&tx_ring->tx_lock)) {
3368                 /* Collision - tell upper layer to requeue */
3369                 local_irq_restore(flags);
3370                 return NETDEV_TX_LOCKED;
3371         }
3372
3373         /* need: count + 2 desc gap to keep tail from touching
3374          * head, otherwise try next time */
3375         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3376                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3377                 return NETDEV_TX_BUSY;
3378         }
3379
3380         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3381                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3382                         netif_stop_queue(netdev);
3383                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3384                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3385                         return NETDEV_TX_BUSY;
3386                 }
3387         }
3388
3389         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3390                 tx_flags |= E1000_TX_FLAGS_VLAN;
3391                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3392         }
3393
3394         first = tx_ring->next_to_use;
3395
3396         tso = e1000_tso(adapter, tx_ring, skb);
3397         if (tso < 0) {
3398                 dev_kfree_skb_any(skb);
3399                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3400                 return NETDEV_TX_OK;
3401         }
3402
3403         if (likely(tso)) {
3404                 tx_ring->last_tx_tso = 1;
3405                 tx_flags |= E1000_TX_FLAGS_TSO;
3406         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3407                 tx_flags |= E1000_TX_FLAGS_CSUM;
3408
3409         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3410          * 82571 hardware supports TSO capabilities for IPv6 as well...
3411          * no longer assume, we must. */
3412         if (likely(skb->protocol == htons(ETH_P_IP)))
3413                 tx_flags |= E1000_TX_FLAGS_IPV4;
3414
3415         e1000_tx_queue(adapter, tx_ring, tx_flags,
3416                        e1000_tx_map(adapter, tx_ring, skb, first,
3417                                     max_per_txd, nr_frags, mss));
3418
3419         netdev->trans_start = jiffies;
3420
3421         /* Make sure there is space in the ring for the next send. */
3422         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3423
3424         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3425         return NETDEV_TX_OK;
3426 }
3427
3428 /**
3429  * e1000_tx_timeout - Respond to a Tx Hang
3430  * @netdev: network interface device structure
3431  **/
3432
3433 static void
3434 e1000_tx_timeout(struct net_device *netdev)
3435 {
3436         struct e1000_adapter *adapter = netdev_priv(netdev);
3437
3438         /* Do the reset outside of interrupt context */
3439         adapter->tx_timeout_count++;
3440         schedule_work(&adapter->reset_task);
3441 }
3442
3443 static void
3444 e1000_reset_task(struct work_struct *work)
3445 {
3446         struct e1000_adapter *adapter =
3447                 container_of(work, struct e1000_adapter, reset_task);
3448
3449         e1000_reinit_locked(adapter);
3450 }
3451
3452 /**
3453  * e1000_get_stats - Get System Network Statistics
3454  * @netdev: network interface device structure
3455  *
3456  * Returns the address of the device statistics structure.
3457  * The statistics are actually updated from the timer callback.
3458  **/
3459
3460 static struct net_device_stats *
3461 e1000_get_stats(struct net_device *netdev)
3462 {
3463         struct e1000_adapter *adapter = netdev_priv(netdev);
3464
3465         /* only return the current stats */
3466         return &adapter->net_stats;
3467 }
3468
3469 /**
3470  * e1000_change_mtu - Change the Maximum Transfer Unit
3471  * @netdev: network interface device structure
3472  * @new_mtu: new value for maximum frame size
3473  *
3474  * Returns 0 on success, negative on failure
3475  **/
3476
3477 static int
3478 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3479 {
3480         struct e1000_adapter *adapter = netdev_priv(netdev);
3481         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3482         uint16_t eeprom_data = 0;
3483
3484         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3485             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3486                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3487                 return -EINVAL;
3488         }
3489
3490         /* Adapter-specific max frame size limits. */
3491         switch (adapter->hw.mac_type) {
3492         case e1000_undefined ... e1000_82542_rev2_1:
3493         case e1000_ich8lan:
3494                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3495                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3496                         return -EINVAL;
3497                 }
3498                 break;
3499         case e1000_82573:
3500                 /* Jumbo Frames not supported if:
3501                  * - this is not an 82573L device
3502                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3503                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3504                                   &eeprom_data);
3505                 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3506                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3507                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3508                                 DPRINTK(PROBE, ERR,
3509                                         "Jumbo Frames not supported.\n");
3510                                 return -EINVAL;
3511                         }
3512                         break;
3513                 }
3514                 /* ERT will be enabled later to enable wire speed receives */
3515
3516                 /* fall through to get support */
3517         case e1000_82571:
3518         case e1000_82572:
3519         case e1000_80003es2lan:
3520 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3521                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3522                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3523                         return -EINVAL;
3524                 }
3525                 break;
3526         default:
3527                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3528                 break;
3529         }
3530
3531         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3532          * means we reserve 2 more, this pushes us to allocate from the next
3533          * larger slab size
3534          * i.e. RXBUFFER_2048 --> size-4096 slab */
3535
3536         if (max_frame <= E1000_RXBUFFER_256)
3537                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3538         else if (max_frame <= E1000_RXBUFFER_512)
3539                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3540         else if (max_frame <= E1000_RXBUFFER_1024)
3541                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3542         else if (max_frame <= E1000_RXBUFFER_2048)
3543                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3544         else if (max_frame <= E1000_RXBUFFER_4096)
3545                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3546         else if (max_frame <= E1000_RXBUFFER_8192)
3547                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3548         else if (max_frame <= E1000_RXBUFFER_16384)
3549                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3550
3551         /* adjust allocation if LPE protects us, and we aren't using SBP */
3552         if (!adapter->hw.tbi_compatibility_on &&
3553             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3554              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3555                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3556
3557         netdev->mtu = new_mtu;
3558         adapter->hw.max_frame_size = max_frame;
3559
3560         if (netif_running(netdev))
3561                 e1000_reinit_locked(adapter);
3562
3563         return 0;
3564 }
3565
3566 /**
3567  * e1000_update_stats - Update the board statistics counters
3568  * @adapter: board private structure
3569  **/
3570
3571 void
3572 e1000_update_stats(struct e1000_adapter *adapter)
3573 {
3574         struct e1000_hw *hw = &adapter->hw;
3575         struct pci_dev *pdev = adapter->pdev;
3576         unsigned long flags;
3577         uint16_t phy_tmp;
3578
3579 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3580
3581         /*
3582          * Prevent stats update while adapter is being reset, or if the pci
3583          * connection is down.
3584          */
3585         if (adapter->link_speed == 0)
3586                 return;
3587         if (pci_channel_offline(pdev))
3588                 return;
3589
3590         spin_lock_irqsave(&adapter->stats_lock, flags);
3591
3592         /* these counters are modified from e1000_adjust_tbi_stats,
3593          * called from the interrupt context, so they must only
3594          * be written while holding adapter->stats_lock
3595          */
3596
3597         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3598         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3599         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3600         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3601         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3602         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3603         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3604
3605         if (adapter->hw.mac_type != e1000_ich8lan) {
3606                 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3607                 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3608                 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3609                 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3610                 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3611                 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3612         }
3613
3614         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3615         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3616         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3617         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3618         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3619         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3620         adapter->stats.dc += E1000_READ_REG(hw, DC);
3621         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3622         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3623         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3624         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3625         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3626         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3627         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3628         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3629         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3630         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3631         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3632         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3633         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3634         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3635         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3636         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3637         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3638         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3639         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3640
3641         if (adapter->hw.mac_type != e1000_ich8lan) {
3642                 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3643                 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3644                 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3645                 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3646                 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3647                 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3648         }
3649
3650         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3651         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3652
3653         /* used for adaptive IFS */
3654
3655         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3656         adapter->stats.tpt += hw->tx_packet_delta;
3657         hw->collision_delta = E1000_READ_REG(hw, COLC);
3658         adapter->stats.colc += hw->collision_delta;
3659
3660         if (hw->mac_type >= e1000_82543) {
3661                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3662                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3663                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3664                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3665                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3666                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3667         }
3668         if (hw->mac_type > e1000_82547_rev_2) {
3669                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3670                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3671
3672                 if (adapter->hw.mac_type != e1000_ich8lan) {
3673                         adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3674                         adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3675                         adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3676                         adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3677                         adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3678                         adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3679                         adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3680                 }
3681         }
3682
3683         /* Fill out the OS statistics structure */
3684         adapter->net_stats.rx_packets = adapter->stats.gprc;
3685         adapter->net_stats.tx_packets = adapter->stats.gptc;
3686         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3687         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3688         adapter->net_stats.multicast = adapter->stats.mprc;
3689         adapter->net_stats.collisions = adapter->stats.colc;
3690
3691         /* Rx Errors */
3692
3693         /* RLEC on some newer hardware can be incorrect so build
3694         * our own version based on RUC and ROC */
3695         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3696                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3697                 adapter->stats.ruc + adapter->stats.roc +
3698                 adapter->stats.cexterr;
3699         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3700         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3701         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3702         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3703         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3704
3705         /* Tx Errors */
3706         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3707         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3708         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3709         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3710         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3711         if (adapter->hw.bad_tx_carr_stats_fd &&
3712             adapter->link_duplex == FULL_DUPLEX) {
3713                 adapter->net_stats.tx_carrier_errors = 0;
3714                 adapter->stats.tncrs = 0;
3715         }
3716
3717         /* Tx Dropped needs to be maintained elsewhere */
3718
3719         /* Phy Stats */
3720         if (hw->media_type == e1000_media_type_copper) {
3721                 if ((adapter->link_speed == SPEED_1000) &&
3722                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3723                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3724                         adapter->phy_stats.idle_errors += phy_tmp;
3725                 }
3726
3727                 if ((hw->mac_type <= e1000_82546) &&
3728                    (hw->phy_type == e1000_phy_m88) &&
3729                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3730                         adapter->phy_stats.receive_errors += phy_tmp;
3731         }
3732
3733         /* Management Stats */
3734         if (adapter->hw.has_smbus) {
3735                 adapter->stats.mgptc += E1000_READ_REG(hw, MGTPTC);
3736                 adapter->stats.mgprc += E1000_READ_REG(hw, MGTPRC);
3737                 adapter->stats.mgpdc += E1000_READ_REG(hw, MGTPDC);
3738         }
3739
3740         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3741 }
3742 #ifdef CONFIG_PCI_MSI
3743
3744 /**
3745  * e1000_intr_msi - Interrupt Handler
3746  * @irq: interrupt number
3747  * @data: pointer to a network interface device structure
3748  **/
3749
3750 static irqreturn_t
3751 e1000_intr_msi(int irq, void *data)
3752 {
3753         struct net_device *netdev = data;
3754         struct e1000_adapter *adapter = netdev_priv(netdev);
3755         struct e1000_hw *hw = &adapter->hw;
3756 #ifndef CONFIG_E1000_NAPI
3757         int i;
3758 #endif
3759         uint32_t icr = E1000_READ_REG(hw, ICR);
3760
3761 #ifdef CONFIG_E1000_NAPI
3762         /* read ICR disables interrupts using IAM, so keep up with our
3763          * enable/disable accounting */
3764         atomic_inc(&adapter->irq_sem);
3765 #endif
3766         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3767                 hw->get_link_status = 1;
3768                 /* 80003ES2LAN workaround-- For packet buffer work-around on
3769                  * link down event; disable receives here in the ISR and reset
3770                  * adapter in watchdog */
3771                 if (netif_carrier_ok(netdev) &&
3772                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3773                         /* disable receives */
3774                         uint32_t rctl = E1000_READ_REG(hw, RCTL);
3775                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3776                 }
3777                 /* guard against interrupt when we're going down */
3778                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3779                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3780         }
3781
3782 #ifdef CONFIG_E1000_NAPI
3783         if (likely(netif_rx_schedule_prep(netdev))) {
3784                 adapter->total_tx_bytes = 0;
3785                 adapter->total_tx_packets = 0;
3786                 adapter->total_rx_bytes = 0;
3787                 adapter->total_rx_packets = 0;
3788                 __netif_rx_schedule(netdev);
3789         } else
3790                 e1000_irq_enable(adapter);
3791 #else
3792         adapter->total_tx_bytes = 0;
3793         adapter->total_rx_bytes = 0;
3794         adapter->total_tx_packets = 0;
3795         adapter->total_rx_packets = 0;
3796
3797         for (i = 0; i < E1000_MAX_INTR; i++)
3798                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3799                    e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3800                         break;
3801
3802         if (likely(adapter->itr_setting & 3))
3803                 e1000_set_itr(adapter);
3804 #endif
3805
3806         return IRQ_HANDLED;
3807 }
3808 #endif
3809
3810 /**
3811  * e1000_intr - Interrupt Handler
3812  * @irq: interrupt number
3813  * @data: pointer to a network interface device structure
3814  **/
3815
3816 static irqreturn_t
3817 e1000_intr(int irq, void *data)
3818 {
3819         struct net_device *netdev = data;
3820         struct e1000_adapter *adapter = netdev_priv(netdev);
3821         struct e1000_hw *hw = &adapter->hw;
3822         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3823 #ifndef CONFIG_E1000_NAPI
3824         int i;
3825 #endif
3826         if (unlikely(!icr))
3827                 return IRQ_NONE;  /* Not our interrupt */
3828
3829 #ifdef CONFIG_E1000_NAPI
3830         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3831          * not set, then the adapter didn't send an interrupt */
3832         if (unlikely(hw->mac_type >= e1000_82571 &&
3833                      !(icr & E1000_ICR_INT_ASSERTED)))
3834                 return IRQ_NONE;
3835
3836         /* Interrupt Auto-Mask...upon reading ICR,
3837          * interrupts are masked.  No need for the
3838          * IMC write, but it does mean we should
3839          * account for it ASAP. */
3840         if (likely(hw->mac_type >= e1000_82571))
3841                 atomic_inc(&adapter->irq_sem);
3842 #endif
3843
3844         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3845                 hw->get_link_status = 1;
3846                 /* 80003ES2LAN workaround--
3847                  * For packet buffer work-around on link down event;
3848                  * disable receives here in the ISR and
3849                  * reset adapter in watchdog
3850                  */
3851                 if (netif_carrier_ok(netdev) &&
3852                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3853                         /* disable receives */
3854                         rctl = E1000_READ_REG(hw, RCTL);
3855                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3856                 }
3857                 /* guard against interrupt when we're going down */
3858                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3859                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3860         }
3861
3862 #ifdef CONFIG_E1000_NAPI
3863         if (unlikely(hw->mac_type < e1000_82571)) {
3864                 /* disable interrupts, without the synchronize_irq bit */
3865                 atomic_inc(&adapter->irq_sem);
3866                 E1000_WRITE_REG(hw, IMC, ~0);
3867                 E1000_WRITE_FLUSH(hw);
3868         }
3869         if (likely(netif_rx_schedule_prep(netdev))) {
3870                 adapter->total_tx_bytes = 0;
3871                 adapter->total_tx_packets = 0;
3872                 adapter->total_rx_bytes = 0;
3873                 adapter->total_rx_packets = 0;
3874                 __netif_rx_schedule(netdev);
3875         } else
3876                 /* this really should not happen! if it does it is basically a
3877                  * bug, but not a hard error, so enable ints and continue */
3878                 e1000_irq_enable(adapter);
3879 #else
3880         /* Writing IMC and IMS is needed for 82547.
3881          * Due to Hub Link bus being occupied, an interrupt
3882          * de-assertion message is not able to be sent.
3883          * When an interrupt assertion message is generated later,
3884          * two messages are re-ordered and sent out.
3885          * That causes APIC to think 82547 is in de-assertion
3886          * state, while 82547 is in assertion state, resulting
3887          * in dead lock. Writing IMC forces 82547 into
3888          * de-assertion state.
3889          */
3890         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3891                 atomic_inc(&adapter->irq_sem);
3892                 E1000_WRITE_REG(hw, IMC, ~0);
3893         }
3894
3895         adapter->total_tx_bytes = 0;
3896         adapter->total_rx_bytes = 0;
3897         adapter->total_tx_packets = 0;
3898         adapter->total_rx_packets = 0;
3899
3900         for (i = 0; i < E1000_MAX_INTR; i++)
3901                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3902                    e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3903                         break;
3904
3905         if (likely(adapter->itr_setting & 3))
3906                 e1000_set_itr(adapter);
3907
3908         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3909                 e1000_irq_enable(adapter);
3910
3911 #endif
3912         return IRQ_HANDLED;
3913 }
3914
3915 #ifdef CONFIG_E1000_NAPI
3916 /**
3917  * e1000_clean - NAPI Rx polling callback
3918  * @adapter: board private structure
3919  **/
3920
3921 static int
3922 e1000_clean(struct net_device *poll_dev, int *budget)
3923 {
3924         struct e1000_adapter *adapter;
3925         int work_to_do = min(*budget, poll_dev->quota);
3926         int tx_cleaned = 0, work_done = 0;
3927
3928         /* Must NOT use netdev_priv macro here. */
3929         adapter = poll_dev->priv;
3930
3931         /* Keep link state information with original netdev */
3932         if (!netif_carrier_ok(poll_dev))
3933                 goto quit_polling;
3934
3935         /* e1000_clean is called per-cpu.  This lock protects
3936          * tx_ring[0] from being cleaned by multiple cpus
3937          * simultaneously.  A failure obtaining the lock means
3938          * tx_ring[0] is currently being cleaned anyway. */
3939         if (spin_trylock(&adapter->tx_queue_lock)) {
3940                 tx_cleaned = e1000_clean_tx_irq(adapter,
3941                                                 &adapter->tx_ring[0]);
3942                 spin_unlock(&adapter->tx_queue_lock);
3943         }
3944
3945         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3946                           &work_done, work_to_do);
3947
3948         *budget -= work_done;
3949         poll_dev->quota -= work_done;
3950
3951         /* If no Tx and not enough Rx work done, exit the polling mode */
3952         if ((tx_cleaned && (work_done < work_to_do)) ||
3953            !netif_running(poll_dev)) {
3954 quit_polling:
3955                 if (likely(adapter->itr_setting & 3))
3956                         e1000_set_itr(adapter);
3957                 netif_rx_complete(poll_dev);
3958                 e1000_irq_enable(adapter);
3959                 return 0;
3960         }
3961
3962         return 1;
3963 }
3964
3965 #endif
3966 /**
3967  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3968  * @adapter: board private structure
3969  **/
3970
3971 static boolean_t
3972 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3973                    struct e1000_tx_ring *tx_ring)
3974 {
3975         struct net_device *netdev = adapter->netdev;
3976         struct e1000_tx_desc *tx_desc, *eop_desc;
3977         struct e1000_buffer *buffer_info;
3978         unsigned int i, eop;
3979 #ifdef CONFIG_E1000_NAPI
3980         unsigned int count = 0;
3981 #endif
3982         boolean_t cleaned = TRUE;
3983         unsigned int total_tx_bytes=0, total_tx_packets=0;
3984
3985         i = tx_ring->next_to_clean;
3986         eop = tx_ring->buffer_info[i].next_to_watch;
3987         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3988
3989         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3990                 for (cleaned = FALSE; !cleaned; ) {
3991                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3992                         buffer_info = &tx_ring->buffer_info[i];
3993                         cleaned = (i == eop);
3994
3995                         if (cleaned) {
3996                                 struct sk_buff *skb = buffer_info->skb;
3997                                 unsigned int segs, bytecount;
3998                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
3999                                 /* multiply data chunks by size of headers */
4000                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
4001                                             skb->len;
4002                                 total_tx_packets += segs;
4003                                 total_tx_bytes += bytecount;
4004                         }
4005                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
4006                         tx_desc->upper.data = 0;
4007
4008                         if (unlikely(++i == tx_ring->count)) i = 0;
4009                 }
4010
4011                 eop = tx_ring->buffer_info[i].next_to_watch;
4012                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
4013 #ifdef CONFIG_E1000_NAPI
4014 #define E1000_TX_WEIGHT 64
4015                 /* weight of a sort for tx, to avoid endless transmit cleanup */
4016                 if (count++ == E1000_TX_WEIGHT) {
4017                         cleaned = FALSE;
4018                         break;
4019                 }
4020 #endif
4021         }
4022
4023         tx_ring->next_to_clean = i;
4024
4025 #define TX_WAKE_THRESHOLD 32
4026         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
4027                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
4028                 /* Make sure that anybody stopping the queue after this
4029                  * sees the new next_to_clean.
4030                  */
4031                 smp_mb();
4032                 if (netif_queue_stopped(netdev)) {
4033                         netif_wake_queue(netdev);
4034                         ++adapter->restart_queue;
4035                 }
4036         }
4037
4038         if (adapter->detect_tx_hung) {
4039                 /* Detect a transmit hang in hardware, this serializes the
4040                  * check with the clearing of time_stamp and movement of i */
4041                 adapter->detect_tx_hung = FALSE;
4042                 if (tx_ring->buffer_info[eop].dma &&
4043                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
4044                                (adapter->tx_timeout_factor * HZ))
4045                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
4046                          E1000_STATUS_TXOFF)) {
4047
4048                         /* detected Tx unit hang */
4049                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
4050                                         "  Tx Queue             <%lu>\n"
4051                                         "  TDH                  <%x>\n"
4052                                         "  TDT                  <%x>\n"
4053                                         "  next_to_use          <%x>\n"
4054                                         "  next_to_clean        <%x>\n"
4055                                         "buffer_info[next_to_clean]\n"
4056                                         "  time_stamp           <%lx>\n"
4057                                         "  next_to_watch        <%x>\n"
4058                                         "  jiffies              <%lx>\n"
4059                                         "  next_to_watch.status <%x>\n",
4060                                 (unsigned long)((tx_ring - adapter->tx_ring) /
4061                                         sizeof(struct e1000_tx_ring)),
4062                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
4063                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
4064                                 tx_ring->next_to_use,
4065                                 tx_ring->next_to_clean,
4066                                 tx_ring->buffer_info[eop].time_stamp,
4067                                 eop,
4068                                 jiffies,
4069                                 eop_desc->upper.fields.status);
4070                         netif_stop_queue(netdev);
4071                 }
4072         }
4073         adapter->total_tx_bytes += total_tx_bytes;
4074         adapter->total_tx_packets += total_tx_packets;
4075         return cleaned;
4076 }
4077
4078 /**
4079  * e1000_rx_checksum - Receive Checksum Offload for 82543
4080  * @adapter:     board private structure
4081  * @status_err:  receive descriptor status and error fields
4082  * @csum:        receive descriptor csum field
4083  * @sk_buff:     socket buffer with received data
4084  **/
4085
4086 static void
4087 e1000_rx_checksum(struct e1000_adapter *adapter,
4088                   uint32_t status_err, uint32_t csum,
4089                   struct sk_buff *skb)
4090 {
4091         uint16_t status = (uint16_t)status_err;
4092         uint8_t errors = (uint8_t)(status_err >> 24);
4093         skb->ip_summed = CHECKSUM_NONE;
4094
4095         /* 82543 or newer only */
4096         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
4097         /* Ignore Checksum bit is set */
4098         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4099         /* TCP/UDP checksum error bit is set */
4100         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4101                 /* let the stack verify checksum errors */
4102                 adapter->hw_csum_err++;
4103                 return;
4104         }
4105         /* TCP/UDP Checksum has not been calculated */
4106         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
4107                 if (!(status & E1000_RXD_STAT_TCPCS))
4108                         return;
4109         } else {
4110                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4111                         return;
4112         }
4113         /* It must be a TCP or UDP packet with a valid checksum */
4114         if (likely(status & E1000_RXD_STAT_TCPCS)) {
4115                 /* TCP checksum is good */
4116                 skb->ip_summed = CHECKSUM_UNNECESSARY;
4117         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
4118                 /* IP fragment with UDP payload */
4119                 /* Hardware complements the payload checksum, so we undo it
4120                  * and then put the value in host order for further stack use.
4121                  */
4122                 csum = ntohl(csum ^ 0xFFFF);
4123                 skb->csum = csum;
4124                 skb->ip_summed = CHECKSUM_COMPLETE;
4125         }
4126         adapter->hw_csum_good++;
4127 }
4128
4129 /**
4130  * e1000_clean_rx_irq - Send received data up the network stack; legacy
4131  * @adapter: board private structure
4132  **/
4133
4134 static boolean_t
4135 #ifdef CONFIG_E1000_NAPI
4136 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4137                    struct e1000_rx_ring *rx_ring,
4138                    int *work_done, int work_to_do)
4139 #else
4140 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4141                    struct e1000_rx_ring *rx_ring)
4142 #endif
4143 {
4144         struct net_device *netdev = adapter->netdev;
4145         struct pci_dev *pdev = adapter->pdev;
4146         struct e1000_rx_desc *rx_desc, *next_rxd;
4147         struct e1000_buffer *buffer_info, *next_buffer;
4148         unsigned long flags;
4149         uint32_t length;
4150         uint8_t last_byte;
4151         unsigned int i;
4152         int cleaned_count = 0;
4153         boolean_t cleaned = FALSE;
4154         unsigned int total_rx_bytes=0, total_rx_packets=0;
4155
4156         i = rx_ring->next_to_clean;
4157         rx_desc = E1000_RX_DESC(*rx_ring, i);
4158         buffer_info = &rx_ring->buffer_info[i];
4159
4160         while (rx_desc->status & E1000_RXD_STAT_DD) {
4161                 struct sk_buff *skb;
4162                 u8 status;
4163
4164 #ifdef CONFIG_E1000_NAPI
4165                 if (*work_done >= work_to_do)
4166                         break;
4167                 (*work_done)++;
4168 #endif
4169                 status = rx_desc->status;
4170                 skb = buffer_info->skb;
4171                 buffer_info->skb = NULL;
4172
4173                 prefetch(skb->data - NET_IP_ALIGN);
4174
4175                 if (++i == rx_ring->count) i = 0;
4176                 next_rxd = E1000_RX_DESC(*rx_ring, i);
4177                 prefetch(next_rxd);
4178
4179                 next_buffer = &rx_ring->buffer_info[i];
4180
4181                 cleaned = TRUE;
4182                 cleaned_count++;
4183                 pci_unmap_single(pdev,
4184                                  buffer_info->dma,
4185                                  buffer_info->length,
4186                                  PCI_DMA_FROMDEVICE);
4187
4188                 length = le16_to_cpu(rx_desc->length);
4189
4190                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4191                         /* All receives must fit into a single buffer */
4192                         E1000_DBG("%s: Receive packet consumed multiple"
4193                                   " buffers\n", netdev->name);
4194                         /* recycle */
4195                         buffer_info->skb = skb;
4196                         goto next_desc;
4197                 }
4198
4199                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4200                         last_byte = *(skb->data + length - 1);
4201                         if (TBI_ACCEPT(&adapter->hw, status,
4202                                       rx_desc->errors, length, last_byte)) {
4203                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4204                                 e1000_tbi_adjust_stats(&adapter->hw,
4205                                                        &adapter->stats,
4206                                                        length, skb->data);
4207                                 spin_unlock_irqrestore(&adapter->stats_lock,
4208                                                        flags);
4209                                 length--;
4210                         } else {
4211                                 /* recycle */
4212                                 buffer_info->skb = skb;
4213                                 goto next_desc;
4214                         }
4215                 }
4216
4217                 /* adjust length to remove Ethernet CRC, this must be
4218                  * done after the TBI_ACCEPT workaround above */
4219                 length -= 4;
4220
4221                 /* probably a little skewed due to removing CRC */
4222                 total_rx_bytes += length;
4223                 total_rx_packets++;
4224
4225                 /* code added for copybreak, this should improve
4226                  * performance for small packets with large amounts
4227                  * of reassembly being done in the stack */
4228                 if (length < copybreak) {
4229                         struct sk_buff *new_skb =
4230                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4231                         if (new_skb) {
4232                                 skb_reserve(new_skb, NET_IP_ALIGN);
4233                                 memcpy(new_skb->data - NET_IP_ALIGN,
4234                                        skb->data - NET_IP_ALIGN,
4235                                        length + NET_IP_ALIGN);
4236                                 /* save the skb in buffer_info as good */
4237                                 buffer_info->skb = skb;
4238                                 skb = new_skb;
4239                         }
4240                         /* else just continue with the old one */
4241                 }
4242                 /* end copybreak code */
4243                 skb_put(skb, length);
4244
4245                 /* Receive Checksum Offload */
4246                 e1000_rx_checksum(adapter,
4247                                   (uint32_t)(status) |
4248                                   ((uint32_t)(rx_desc->errors) << 24),
4249                                   le16_to_cpu(rx_desc->csum), skb);
4250
4251                 skb->protocol = eth_type_trans(skb, netdev);
4252 #ifdef CONFIG_E1000_NAPI
4253                 if (unlikely(adapter->vlgrp &&
4254                             (status & E1000_RXD_STAT_VP))) {
4255                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4256                                                  le16_to_cpu(rx_desc->special) &
4257                                                  E1000_RXD_SPC_VLAN_MASK);
4258                 } else {
4259                         netif_receive_skb(skb);
4260                 }
4261 #else /* CONFIG_E1000_NAPI */
4262                 if (unlikely(adapter->vlgrp &&
4263                             (status & E1000_RXD_STAT_VP))) {
4264                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4265                                         le16_to_cpu(rx_desc->special) &
4266                                         E1000_RXD_SPC_VLAN_MASK);
4267                 } else {
4268                         netif_rx(skb);
4269                 }
4270 #endif /* CONFIG_E1000_NAPI */
4271                 netdev->last_rx = jiffies;
4272
4273 next_desc:
4274                 rx_desc->status = 0;
4275
4276                 /* return some buffers to hardware, one at a time is too slow */
4277                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4278                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4279                         cleaned_count = 0;
4280                 }
4281
4282                 /* use prefetched values */
4283                 rx_desc = next_rxd;
4284                 buffer_info = next_buffer;
4285         }
4286         rx_ring->next_to_clean = i;
4287
4288         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4289         if (cleaned_count)
4290                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4291
4292         adapter->total_rx_packets += total_rx_packets;
4293         adapter->total_rx_bytes += total_rx_bytes;
4294         return cleaned;
4295 }
4296
4297 /**
4298  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4299  * @adapter: board private structure
4300  **/
4301
4302 static boolean_t
4303 #ifdef CONFIG_E1000_NAPI
4304 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4305                       struct e1000_rx_ring *rx_ring,
4306                       int *work_done, int work_to_do)
4307 #else
4308 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4309                       struct e1000_rx_ring *rx_ring)
4310 #endif
4311 {
4312         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4313         struct net_device *netdev = adapter->netdev;
4314         struct pci_dev *pdev = adapter->pdev;
4315         struct e1000_buffer *buffer_info, *next_buffer;
4316         struct e1000_ps_page *ps_page;
4317         struct e1000_ps_page_dma *ps_page_dma;
4318         struct sk_buff *skb;
4319         unsigned int i, j;
4320         uint32_t length, staterr;
4321         int cleaned_count = 0;
4322         boolean_t cleaned = FALSE;
4323         unsigned int total_rx_bytes=0, total_rx_packets=0;
4324
4325         i = rx_ring->next_to_clean;
4326         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4327         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4328         buffer_info = &rx_ring->buffer_info[i];
4329
4330         while (staterr & E1000_RXD_STAT_DD) {
4331                 ps_page = &rx_ring->ps_page[i];
4332                 ps_page_dma = &rx_ring->ps_page_dma[i];
4333 #ifdef CONFIG_E1000_NAPI
4334                 if (unlikely(*work_done >= work_to_do))
4335                         break;
4336                 (*work_done)++;
4337 #endif
4338                 skb = buffer_info->skb;
4339
4340                 /* in the packet split case this is header only */
4341                 prefetch(skb->data - NET_IP_ALIGN);
4342
4343                 if (++i == rx_ring->count) i = 0;
4344                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4345                 prefetch(next_rxd);
4346
4347                 next_buffer = &rx_ring->buffer_info[i];
4348
4349                 cleaned = TRUE;
4350                 cleaned_count++;
4351                 pci_unmap_single(pdev, buffer_info->dma,
4352                                  buffer_info->length,
4353                                  PCI_DMA_FROMDEVICE);
4354
4355                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4356                         E1000_DBG("%s: Packet Split buffers didn't pick up"
4357                                   " the full packet\n", netdev->name);
4358                         dev_kfree_skb_irq(skb);
4359                         goto next_desc;
4360                 }
4361
4362                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4363                         dev_kfree_skb_irq(skb);
4364                         goto next_desc;
4365                 }
4366
4367                 length = le16_to_cpu(rx_desc->wb.middle.length0);
4368
4369                 if (unlikely(!length)) {
4370                         E1000_DBG("%s: Last part of the packet spanning"
4371                                   " multiple descriptors\n", netdev->name);
4372                         dev_kfree_skb_irq(skb);
4373                         goto next_desc;
4374                 }
4375
4376                 /* Good Receive */
4377                 skb_put(skb, length);
4378
4379                 {
4380                 /* this looks ugly, but it seems compiler issues make it
4381                    more efficient than reusing j */
4382                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4383
4384                 /* page alloc/put takes too long and effects small packet
4385                  * throughput, so unsplit small packets and save the alloc/put*/
4386                 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
4387                         u8 *vaddr;
4388                         /* there is no documentation about how to call
4389                          * kmap_atomic, so we can't hold the mapping
4390                          * very long */
4391                         pci_dma_sync_single_for_cpu(pdev,
4392                                 ps_page_dma->ps_page_dma[0],
4393                                 PAGE_SIZE,
4394                                 PCI_DMA_FROMDEVICE);
4395                         vaddr = kmap_atomic(ps_page->ps_page[0],
4396                                             KM_SKB_DATA_SOFTIRQ);
4397                         memcpy(skb->tail, vaddr, l1);
4398                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4399                         pci_dma_sync_single_for_device(pdev,
4400                                 ps_page_dma->ps_page_dma[0],
4401                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4402                         /* remove the CRC */
4403                         l1 -= 4;
4404                         skb_put(skb, l1);
4405                         goto copydone;
4406                 } /* if */
4407                 }
4408
4409                 for (j = 0; j < adapter->rx_ps_pages; j++) {
4410                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
4411                                 break;
4412                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4413                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
4414                         ps_page_dma->ps_page_dma[j] = 0;
4415                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4416                                            length);
4417                         ps_page->ps_page[j] = NULL;
4418                         skb->len += length;
4419                         skb->data_len += length;
4420                         skb->truesize += length;
4421                 }
4422
4423                 /* strip the ethernet crc, problem is we're using pages now so
4424                  * this whole operation can get a little cpu intensive */
4425                 pskb_trim(skb, skb->len - 4);
4426
4427 copydone:
4428                 total_rx_bytes += skb->len;
4429                 total_rx_packets++;
4430
4431                 e1000_rx_checksum(adapter, staterr,
4432                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4433                 skb->protocol = eth_type_trans(skb, netdev);
4434
4435                 if (likely(rx_desc->wb.upper.header_status &
4436                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4437                         adapter->rx_hdr_split++;
4438 #ifdef CONFIG_E1000_NAPI
4439                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4440                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4441                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4442                                 E1000_RXD_SPC_VLAN_MASK);
4443                 } else {
4444                         netif_receive_skb(skb);
4445                 }
4446 #else /* CONFIG_E1000_NAPI */
4447                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4448                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4449                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4450                                 E1000_RXD_SPC_VLAN_MASK);
4451                 } else {
4452                         netif_rx(skb);
4453                 }
4454 #endif /* CONFIG_E1000_NAPI */
4455                 netdev->last_rx = jiffies;
4456
4457 next_desc:
4458                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4459                 buffer_info->skb = NULL;
4460
4461                 /* return some buffers to hardware, one at a time is too slow */
4462                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4463                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4464                         cleaned_count = 0;
4465                 }
4466
4467                 /* use prefetched values */
4468                 rx_desc = next_rxd;
4469                 buffer_info = next_buffer;
4470
4471                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4472         }
4473         rx_ring->next_to_clean = i;
4474
4475         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4476         if (cleaned_count)
4477                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4478
4479         adapter->total_rx_packets += total_rx_packets;
4480         adapter->total_rx_bytes += total_rx_bytes;
4481         return cleaned;
4482 }
4483
4484 /**
4485  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4486  * @adapter: address of board private structure
4487  **/
4488
4489 static void
4490 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4491                        struct e1000_rx_ring *rx_ring,
4492                        int cleaned_count)
4493 {
4494         struct net_device *netdev = adapter->netdev;
4495         struct pci_dev *pdev = adapter->pdev;
4496         struct e1000_rx_desc *rx_desc;
4497         struct e1000_buffer *buffer_info;
4498         struct sk_buff *skb;
4499         unsigned int i;
4500         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4501
4502         i = rx_ring->next_to_use;
4503         buffer_info = &rx_ring->buffer_info[i];
4504
4505         while (cleaned_count--) {
4506                 skb = buffer_info->skb;
4507                 if (skb) {
4508                         skb_trim(skb, 0);
4509                         goto map_skb;
4510                 }
4511
4512                 skb = netdev_alloc_skb(netdev, bufsz);
4513                 if (unlikely(!skb)) {
4514                         /* Better luck next round */
4515                         adapter->alloc_rx_buff_failed++;
4516                         break;
4517                 }
4518
4519                 /* Fix for errata 23, can't cross 64kB boundary */
4520                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4521                         struct sk_buff *oldskb = skb;
4522                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4523                                              "at %p\n", bufsz, skb->data);
4524                         /* Try again, without freeing the previous */
4525                         skb = netdev_alloc_skb(netdev, bufsz);
4526                         /* Failed allocation, critical failure */
4527                         if (!skb) {
4528                                 dev_kfree_skb(oldskb);
4529                                 break;
4530                         }
4531
4532                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4533                                 /* give up */
4534                                 dev_kfree_skb(skb);
4535                                 dev_kfree_skb(oldskb);
4536                                 break; /* while !buffer_info->skb */
4537                         }
4538
4539                         /* Use new allocation */
4540                         dev_kfree_skb(oldskb);
4541                 }
4542                 /* Make buffer alignment 2 beyond a 16 byte boundary
4543                  * this will result in a 16 byte aligned IP header after
4544                  * the 14 byte MAC header is removed
4545                  */
4546                 skb_reserve(skb, NET_IP_ALIGN);
4547
4548                 buffer_info->skb = skb;
4549                 buffer_info->length = adapter->rx_buffer_len;
4550 map_skb:
4551                 buffer_info->dma = pci_map_single(pdev,
4552                                                   skb->data,
4553                                                   adapter->rx_buffer_len,
4554                                                   PCI_DMA_FROMDEVICE);
4555
4556                 /* Fix for errata 23, can't cross 64kB boundary */
4557                 if (!e1000_check_64k_bound(adapter,
4558                                         (void *)(unsigned long)buffer_info->dma,
4559                                         adapter->rx_buffer_len)) {
4560                         DPRINTK(RX_ERR, ERR,
4561                                 "dma align check failed: %u bytes at %p\n",
4562                                 adapter->rx_buffer_len,
4563                                 (void *)(unsigned long)buffer_info->dma);
4564                         dev_kfree_skb(skb);
4565                         buffer_info->skb = NULL;
4566
4567                         pci_unmap_single(pdev, buffer_info->dma,
4568                                          adapter->rx_buffer_len,
4569                                          PCI_DMA_FROMDEVICE);
4570
4571                         break; /* while !buffer_info->skb */
4572                 }
4573                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4574                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4575
4576                 if (unlikely(++i == rx_ring->count))
4577                         i = 0;
4578                 buffer_info = &rx_ring->buffer_info[i];
4579         }
4580
4581         if (likely(rx_ring->next_to_use != i)) {
4582                 rx_ring->next_to_use = i;
4583                 if (unlikely(i-- == 0))
4584                         i = (rx_ring->count - 1);
4585
4586                 /* Force memory writes to complete before letting h/w
4587                  * know there are new descriptors to fetch.  (Only
4588                  * applicable for weak-ordered memory model archs,
4589                  * such as IA-64). */
4590                 wmb();
4591                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4592         }
4593 }
4594
4595 /**
4596  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4597  * @adapter: address of board private structure
4598  **/
4599
4600 static void
4601 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4602                           struct e1000_rx_ring *rx_ring,
4603                           int cleaned_count)
4604 {
4605         struct net_device *netdev = adapter->netdev;
4606         struct pci_dev *pdev = adapter->pdev;
4607         union e1000_rx_desc_packet_split *rx_desc;
4608         struct e1000_buffer *buffer_info;
4609         struct e1000_ps_page *ps_page;
4610         struct e1000_ps_page_dma *ps_page_dma;
4611         struct sk_buff *skb;
4612         unsigned int i, j;
4613
4614         i = rx_ring->next_to_use;
4615         buffer_info = &rx_ring->buffer_info[i];
4616         ps_page = &rx_ring->ps_page[i];
4617         ps_page_dma = &rx_ring->ps_page_dma[i];
4618
4619         while (cleaned_count--) {
4620                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4621
4622                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4623                         if (j < adapter->rx_ps_pages) {
4624                                 if (likely(!ps_page->ps_page[j])) {
4625                                         ps_page->ps_page[j] =
4626                                                 alloc_page(GFP_ATOMIC);
4627                                         if (unlikely(!ps_page->ps_page[j])) {
4628                                                 adapter->alloc_rx_buff_failed++;
4629                                                 goto no_buffers;
4630                                         }
4631                                         ps_page_dma->ps_page_dma[j] =
4632                                                 pci_map_page(pdev,
4633                                                             ps_page->ps_page[j],
4634                                                             0, PAGE_SIZE,
4635                                                             PCI_DMA_FROMDEVICE);
4636                                 }
4637                                 /* Refresh the desc even if buffer_addrs didn't
4638                                  * change because each write-back erases
4639                                  * this info.
4640                                  */
4641                                 rx_desc->read.buffer_addr[j+1] =
4642                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4643                         } else
4644                                 rx_desc->read.buffer_addr[j+1] = ~0;
4645                 }
4646
4647                 skb = netdev_alloc_skb(netdev,
4648                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4649
4650                 if (unlikely(!skb)) {
4651                         adapter->alloc_rx_buff_failed++;
4652                         break;
4653                 }
4654
4655                 /* Make buffer alignment 2 beyond a 16 byte boundary
4656                  * this will result in a 16 byte aligned IP header after
4657                  * the 14 byte MAC header is removed
4658                  */
4659                 skb_reserve(skb, NET_IP_ALIGN);
4660
4661                 buffer_info->skb = skb;
4662                 buffer_info->length = adapter->rx_ps_bsize0;
4663                 buffer_info->dma = pci_map_single(pdev, skb->data,
4664                                                   adapter->rx_ps_bsize0,
4665                                                   PCI_DMA_FROMDEVICE);
4666
4667                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4668
4669                 if (unlikely(++i == rx_ring->count)) i = 0;
4670                 buffer_info = &rx_ring->buffer_info[i];
4671                 ps_page = &rx_ring->ps_page[i];
4672                 ps_page_dma = &rx_ring->ps_page_dma[i];
4673         }
4674
4675 no_buffers:
4676         if (likely(rx_ring->next_to_use != i)) {
4677                 rx_ring->next_to_use = i;
4678                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4679
4680                 /* Force memory writes to complete before letting h/w
4681                  * know there are new descriptors to fetch.  (Only
4682                  * applicable for weak-ordered memory model archs,
4683                  * such as IA-64). */
4684                 wmb();
4685                 /* Hardware increments by 16 bytes, but packet split
4686                  * descriptors are 32 bytes...so we increment tail
4687                  * twice as much.
4688                  */
4689                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4690         }
4691 }
4692
4693 /**
4694  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4695  * @adapter:
4696  **/
4697
4698 static void
4699 e1000_smartspeed(struct e1000_adapter *adapter)
4700 {
4701         uint16_t phy_status;
4702         uint16_t phy_ctrl;
4703
4704         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4705            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4706                 return;
4707
4708         if (adapter->smartspeed == 0) {
4709                 /* If Master/Slave config fault is asserted twice,
4710                  * we assume back-to-back */
4711                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4712                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4713                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4714                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4715                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4716                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4717                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4718                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4719                                             phy_ctrl);
4720                         adapter->smartspeed++;
4721                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4722                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4723                                                &phy_ctrl)) {
4724                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4725                                              MII_CR_RESTART_AUTO_NEG);
4726                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4727                                                     phy_ctrl);
4728                         }
4729                 }
4730                 return;
4731         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4732                 /* If still no link, perhaps using 2/3 pair cable */
4733                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4734                 phy_ctrl |= CR_1000T_MS_ENABLE;
4735                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4736                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4737                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4738                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4739                                      MII_CR_RESTART_AUTO_NEG);
4740                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4741                 }
4742         }
4743         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4744         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4745                 adapter->smartspeed = 0;
4746 }
4747
4748 /**
4749  * e1000_ioctl -
4750  * @netdev:
4751  * @ifreq:
4752  * @cmd:
4753  **/
4754
4755 static int
4756 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4757 {
4758         switch (cmd) {
4759         case SIOCGMIIPHY:
4760         case SIOCGMIIREG:
4761         case SIOCSMIIREG:
4762                 return e1000_mii_ioctl(netdev, ifr, cmd);
4763         default:
4764                 return -EOPNOTSUPP;
4765         }
4766 }
4767
4768 /**
4769  * e1000_mii_ioctl -
4770  * @netdev:
4771  * @ifreq:
4772  * @cmd:
4773  **/
4774
4775 static int
4776 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4777 {
4778         struct e1000_adapter *adapter = netdev_priv(netdev);
4779         struct mii_ioctl_data *data = if_mii(ifr);
4780         int retval;
4781         uint16_t mii_reg;
4782         uint16_t spddplx;
4783         unsigned long flags;
4784
4785         if (adapter->hw.media_type != e1000_media_type_copper)
4786                 return -EOPNOTSUPP;
4787
4788         switch (cmd) {
4789         case SIOCGMIIPHY:
4790                 data->phy_id = adapter->hw.phy_addr;
4791                 break;
4792         case SIOCGMIIREG:
4793                 if (!capable(CAP_NET_ADMIN))
4794                         return -EPERM;
4795                 spin_lock_irqsave(&adapter->stats_lock, flags);
4796                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4797                                    &data->val_out)) {
4798                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4799                         return -EIO;
4800                 }
4801                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4802                 break;
4803         case SIOCSMIIREG:
4804                 if (!capable(CAP_NET_ADMIN))
4805                         return -EPERM;
4806                 if (data->reg_num & ~(0x1F))
4807                         return -EFAULT;
4808                 mii_reg = data->val_in;
4809                 spin_lock_irqsave(&adapter->stats_lock, flags);
4810                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4811                                         mii_reg)) {
4812                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4813                         return -EIO;
4814                 }
4815                 if (adapter->hw.media_type == e1000_media_type_copper) {
4816                         switch (data->reg_num) {
4817                         case PHY_CTRL:
4818                                 if (mii_reg & MII_CR_POWER_DOWN)
4819                                         break;
4820                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4821                                         adapter->hw.autoneg = 1;
4822                                         adapter->hw.autoneg_advertised = 0x2F;
4823                                 } else {
4824                                         if (mii_reg & 0x40)
4825                                                 spddplx = SPEED_1000;
4826                                         else if (mii_reg & 0x2000)
4827                                                 spddplx = SPEED_100;
4828                                         else
4829                                                 spddplx = SPEED_10;
4830                                         spddplx += (mii_reg & 0x100)
4831                                                    ? DUPLEX_FULL :
4832                                                    DUPLEX_HALF;
4833                                         retval = e1000_set_spd_dplx(adapter,
4834                                                                     spddplx);
4835                                         if (retval) {
4836                                                 spin_unlock_irqrestore(
4837                                                         &adapter->stats_lock,
4838                                                         flags);
4839                                                 return retval;
4840                                         }
4841                                 }
4842                                 if (netif_running(adapter->netdev))
4843                                         e1000_reinit_locked(adapter);
4844                                 else
4845                                         e1000_reset(adapter);
4846                                 break;
4847                         case M88E1000_PHY_SPEC_CTRL:
4848                         case M88E1000_EXT_PHY_SPEC_CTRL:
4849                                 if (e1000_phy_reset(&adapter->hw)) {
4850                                         spin_unlock_irqrestore(
4851                                                 &adapter->stats_lock, flags);
4852                                         return -EIO;
4853                                 }
4854                                 break;
4855                         }
4856                 } else {
4857                         switch (data->reg_num) {
4858                         case PHY_CTRL:
4859                                 if (mii_reg & MII_CR_POWER_DOWN)
4860                                         break;
4861                                 if (netif_running(adapter->netdev))
4862                                         e1000_reinit_locked(adapter);
4863                                 else
4864                                         e1000_reset(adapter);
4865                                 break;
4866                         }
4867                 }
4868                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4869                 break;
4870         default:
4871                 return -EOPNOTSUPP;
4872         }
4873         return E1000_SUCCESS;
4874 }
4875
4876 void
4877 e1000_pci_set_mwi(struct e1000_hw *hw)
4878 {
4879         struct e1000_adapter *adapter = hw->back;
4880         int ret_val = pci_set_mwi(adapter->pdev);
4881
4882         if (ret_val)
4883                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4884 }
4885
4886 void
4887 e1000_pci_clear_mwi(struct e1000_hw *hw)
4888 {
4889         struct e1000_adapter *adapter = hw->back;
4890
4891         pci_clear_mwi(adapter->pdev);
4892 }
4893
4894 void
4895 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4896 {
4897         struct e1000_adapter *adapter = hw->back;
4898
4899         pci_read_config_word(adapter->pdev, reg, value);
4900 }
4901
4902 void
4903 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4904 {
4905         struct e1000_adapter *adapter = hw->back;
4906
4907         pci_write_config_word(adapter->pdev, reg, *value);
4908 }
4909
4910 int32_t
4911 e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4912 {
4913     struct e1000_adapter *adapter = hw->back;
4914     uint16_t cap_offset;
4915
4916     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4917     if (!cap_offset)
4918         return -E1000_ERR_CONFIG;
4919
4920     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4921
4922     return E1000_SUCCESS;
4923 }
4924
4925 void
4926 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4927 {
4928         outl(value, port);
4929 }
4930
4931 static void
4932 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4933 {
4934         struct e1000_adapter *adapter = netdev_priv(netdev);
4935         uint32_t ctrl, rctl;
4936
4937         e1000_irq_disable(adapter);
4938         adapter->vlgrp = grp;
4939
4940         if (grp) {
4941                 /* enable VLAN tag insert/strip */
4942                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4943                 ctrl |= E1000_CTRL_VME;
4944                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4945
4946                 if (adapter->hw.mac_type != e1000_ich8lan) {
4947                         /* enable VLAN receive filtering */
4948                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4949                         rctl |= E1000_RCTL_VFE;
4950                         rctl &= ~E1000_RCTL_CFIEN;
4951                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4952                         e1000_update_mng_vlan(adapter);
4953                 }
4954         } else {
4955                 /* disable VLAN tag insert/strip */
4956                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4957                 ctrl &= ~E1000_CTRL_VME;
4958                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4959
4960                 if (adapter->hw.mac_type != e1000_ich8lan) {
4961                         /* disable VLAN filtering */
4962                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4963                         rctl &= ~E1000_RCTL_VFE;
4964                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4965                         if (adapter->mng_vlan_id !=
4966                             (uint16_t)E1000_MNG_VLAN_NONE) {
4967                                 e1000_vlan_rx_kill_vid(netdev,
4968                                                        adapter->mng_vlan_id);
4969                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4970                         }
4971                 }
4972         }
4973
4974         e1000_irq_enable(adapter);
4975 }
4976
4977 static void
4978 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4979 {
4980         struct e1000_adapter *adapter = netdev_priv(netdev);
4981         uint32_t vfta, index;
4982
4983         if ((adapter->hw.mng_cookie.status &
4984              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4985             (vid == adapter->mng_vlan_id))
4986                 return;
4987         /* add VID to filter table */
4988         index = (vid >> 5) & 0x7F;
4989         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4990         vfta |= (1 << (vid & 0x1F));
4991         e1000_write_vfta(&adapter->hw, index, vfta);
4992 }
4993
4994 static void
4995 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4996 {
4997         struct e1000_adapter *adapter = netdev_priv(netdev);
4998         uint32_t vfta, index;
4999
5000         e1000_irq_disable(adapter);
5001
5002         if (adapter->vlgrp)
5003                 adapter->vlgrp->vlan_devices[vid] = NULL;
5004
5005         e1000_irq_enable(adapter);
5006
5007         if ((adapter->hw.mng_cookie.status &
5008              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5009             (vid == adapter->mng_vlan_id)) {
5010                 /* release control to f/w */
5011                 e1000_release_hw_control(adapter);
5012                 return;
5013         }
5014
5015         /* remove VID from filter table */
5016         index = (vid >> 5) & 0x7F;
5017         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5018         vfta &= ~(1 << (vid & 0x1F));
5019         e1000_write_vfta(&adapter->hw, index, vfta);
5020 }
5021
5022 static void
5023 e1000_restore_vlan(struct e1000_adapter *adapter)
5024 {
5025         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5026
5027         if (adapter->vlgrp) {
5028                 uint16_t vid;
5029                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5030                         if (!adapter->vlgrp->vlan_devices[vid])
5031                                 continue;
5032                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
5033                 }
5034         }
5035 }
5036
5037 int
5038 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
5039 {
5040         adapter->hw.autoneg = 0;
5041
5042         /* Fiber NICs only allow 1000 gbps Full duplex */
5043         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
5044                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5045                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5046                 return -EINVAL;
5047         }
5048
5049         switch (spddplx) {
5050         case SPEED_10 + DUPLEX_HALF:
5051                 adapter->hw.forced_speed_duplex = e1000_10_half;
5052                 break;
5053         case SPEED_10 + DUPLEX_FULL:
5054                 adapter->hw.forced_speed_duplex = e1000_10_full;
5055                 break;
5056         case SPEED_100 + DUPLEX_HALF:
5057                 adapter->hw.forced_speed_duplex = e1000_100_half;
5058                 break;
5059         case SPEED_100 + DUPLEX_FULL:
5060                 adapter->hw.forced_speed_duplex = e1000_100_full;
5061                 break;
5062         case SPEED_1000 + DUPLEX_FULL:
5063                 adapter->hw.autoneg = 1;
5064                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5065                 break;
5066         case SPEED_1000 + DUPLEX_HALF: /* not supported */
5067         default:
5068                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5069                 return -EINVAL;
5070         }
5071         return 0;
5072 }
5073
5074 #ifdef CONFIG_PM
5075 /* Save/restore 16 or 64 dwords of PCI config space depending on which
5076  * bus we're on (PCI(X) vs. PCI-E)
5077  */
5078 #define PCIE_CONFIG_SPACE_LEN 256
5079 #define PCI_CONFIG_SPACE_LEN 64
5080 static int
5081 e1000_pci_save_state(struct e1000_adapter *adapter)
5082 {
5083         struct pci_dev *dev = adapter->pdev;
5084         int size;
5085         int i;
5086
5087         if (adapter->hw.mac_type >= e1000_82571)
5088                 size = PCIE_CONFIG_SPACE_LEN;
5089         else
5090                 size = PCI_CONFIG_SPACE_LEN;
5091
5092         WARN_ON(adapter->config_space != NULL);
5093
5094         adapter->config_space = kmalloc(size, GFP_KERNEL);
5095         if (!adapter->config_space) {
5096                 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
5097                 return -ENOMEM;
5098         }
5099         for (i = 0; i < (size / 4); i++)
5100                 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
5101         return 0;
5102 }
5103
5104 static void
5105 e1000_pci_restore_state(struct e1000_adapter *adapter)
5106 {
5107         struct pci_dev *dev = adapter->pdev;
5108         int size;
5109         int i;
5110
5111         if (adapter->config_space == NULL)
5112                 return;
5113
5114         if (adapter->hw.mac_type >= e1000_82571)
5115                 size = PCIE_CONFIG_SPACE_LEN;
5116         else
5117                 size = PCI_CONFIG_SPACE_LEN;
5118         for (i = 0; i < (size / 4); i++)
5119                 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
5120         kfree(adapter->config_space);
5121         adapter->config_space = NULL;
5122         return;
5123 }
5124 #endif /* CONFIG_PM */
5125
5126 static int
5127 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5128 {
5129         struct net_device *netdev = pci_get_drvdata(pdev);
5130         struct e1000_adapter *adapter = netdev_priv(netdev);
5131         uint32_t ctrl, ctrl_ext, rctl, status;
5132         uint32_t wufc = adapter->wol;
5133 #ifdef CONFIG_PM
5134         int retval = 0;
5135 #endif
5136
5137         netif_device_detach(netdev);
5138
5139         if (netif_running(netdev)) {
5140                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5141                 e1000_down(adapter);
5142         }
5143
5144 #ifdef CONFIG_PM
5145         /* Implement our own version of pci_save_state(pdev) because pci-
5146          * express adapters have 256-byte config spaces. */
5147         retval = e1000_pci_save_state(adapter);
5148         if (retval)
5149                 return retval;
5150 #endif
5151
5152         status = E1000_READ_REG(&adapter->hw, STATUS);
5153         if (status & E1000_STATUS_LU)
5154                 wufc &= ~E1000_WUFC_LNKC;
5155
5156         if (wufc) {
5157                 e1000_setup_rctl(adapter);
5158                 e1000_set_multi(netdev);
5159
5160                 /* turn on all-multi mode if wake on multicast is enabled */
5161                 if (wufc & E1000_WUFC_MC) {
5162                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
5163                         rctl |= E1000_RCTL_MPE;
5164                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5165                 }
5166
5167                 if (adapter->hw.mac_type >= e1000_82540) {
5168                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5169                         /* advertise wake from D3Cold */
5170                         #define E1000_CTRL_ADVD3WUC 0x00100000
5171                         /* phy power management enable */
5172                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5173                         ctrl |= E1000_CTRL_ADVD3WUC |
5174                                 E1000_CTRL_EN_PHY_PWR_MGMT;
5175                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5176                 }
5177
5178                 if (adapter->hw.media_type == e1000_media_type_fiber ||
5179                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
5180                         /* keep the laser running in D3 */
5181                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
5182                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5183                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
5184                 }
5185
5186                 /* Allow time for pending master requests to run */
5187                 e1000_disable_pciex_master(&adapter->hw);
5188
5189                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
5190                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
5191                 pci_enable_wake(pdev, PCI_D3hot, 1);
5192                 pci_enable_wake(pdev, PCI_D3cold, 1);
5193         } else {
5194                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
5195                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
5196                 pci_enable_wake(pdev, PCI_D3hot, 0);
5197                 pci_enable_wake(pdev, PCI_D3cold, 0);
5198         }
5199
5200         e1000_release_manageability(adapter);
5201
5202         /* make sure adapter isn't asleep if manageability is enabled */
5203         if (adapter->en_mng_pt) {
5204                 pci_enable_wake(pdev, PCI_D3hot, 1);
5205                 pci_enable_wake(pdev, PCI_D3cold, 1);
5206         }
5207
5208         if (adapter->hw.phy_type == e1000_phy_igp_3)
5209                 e1000_phy_powerdown_workaround(&adapter->hw);
5210
5211         if (netif_running(netdev))
5212                 e1000_free_irq(adapter);
5213
5214         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
5215          * would have already happened in close and is redundant. */
5216         e1000_release_hw_control(adapter);
5217
5218         pci_disable_device(pdev);
5219
5220         pci_set_power_state(pdev, pci_choose_state(pdev, state));
5221
5222         return 0;
5223 }
5224
5225 #ifdef CONFIG_PM
5226 static int
5227 e1000_resume(struct pci_dev *pdev)
5228 {
5229         struct net_device *netdev = pci_get_drvdata(pdev);
5230         struct e1000_adapter *adapter = netdev_priv(netdev);
5231         uint32_t err;
5232
5233         pci_set_power_state(pdev, PCI_D0);
5234         e1000_pci_restore_state(adapter);
5235         if ((err = pci_enable_device(pdev))) {
5236                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5237                 return err;
5238         }
5239         pci_set_master(pdev);
5240
5241         pci_enable_wake(pdev, PCI_D3hot, 0);
5242         pci_enable_wake(pdev, PCI_D3cold, 0);
5243
5244         if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5245                 return err;
5246
5247         e1000_power_up_phy(adapter);
5248         e1000_reset(adapter);
5249         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5250
5251         e1000_init_manageability(adapter);
5252
5253         if (netif_running(netdev))
5254                 e1000_up(adapter);
5255
5256         netif_device_attach(netdev);
5257
5258         /* If the controller is 82573 and f/w is AMT, do not set
5259          * DRV_LOAD until the interface is up.  For all other cases,
5260          * let the f/w know that the h/w is now under the control
5261          * of the driver. */
5262         if (adapter->hw.mac_type != e1000_82573 ||
5263             !e1000_check_mng_mode(&adapter->hw))
5264                 e1000_get_hw_control(adapter);
5265
5266         return 0;
5267 }
5268 #endif
5269
5270 static void e1000_shutdown(struct pci_dev *pdev)
5271 {
5272         e1000_suspend(pdev, PMSG_SUSPEND);
5273 }
5274
5275 #ifdef CONFIG_NET_POLL_CONTROLLER
5276 /*
5277  * Polling 'interrupt' - used by things like netconsole to send skbs
5278  * without having to re-enable interrupts. It's not called while
5279  * the interrupt routine is executing.
5280  */
5281 static void
5282 e1000_netpoll(struct net_device *netdev)
5283 {
5284         struct e1000_adapter *adapter = netdev_priv(netdev);
5285
5286         disable_irq(adapter->pdev->irq);
5287         e1000_intr(adapter->pdev->irq, netdev);
5288         e1000_clean_tx_irq(adapter, adapter->tx_ring);
5289 #ifndef CONFIG_E1000_NAPI
5290         adapter->clean_rx(adapter, adapter->rx_ring);
5291 #endif
5292         enable_irq(adapter->pdev->irq);
5293 }
5294 #endif
5295
5296 /**
5297  * e1000_io_error_detected - called when PCI error is detected
5298  * @pdev: Pointer to PCI device
5299  * @state: The current pci conneection state
5300  *
5301  * This function is called after a PCI bus error affecting
5302  * this device has been detected.
5303  */
5304 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
5305 {
5306         struct net_device *netdev = pci_get_drvdata(pdev);
5307         struct e1000_adapter *adapter = netdev->priv;
5308
5309         netif_device_detach(netdev);
5310
5311         if (netif_running(netdev))
5312                 e1000_down(adapter);
5313         pci_disable_device(pdev);
5314
5315         /* Request a slot slot reset. */
5316         return PCI_ERS_RESULT_NEED_RESET;
5317 }
5318
5319 /**
5320  * e1000_io_slot_reset - called after the pci bus has been reset.
5321  * @pdev: Pointer to PCI device
5322  *
5323  * Restart the card from scratch, as if from a cold-boot. Implementation
5324  * resembles the first-half of the e1000_resume routine.
5325  */
5326 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5327 {
5328         struct net_device *netdev = pci_get_drvdata(pdev);
5329         struct e1000_adapter *adapter = netdev->priv;
5330
5331         if (pci_enable_device(pdev)) {
5332                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5333                 return PCI_ERS_RESULT_DISCONNECT;
5334         }
5335         pci_set_master(pdev);
5336
5337         pci_enable_wake(pdev, PCI_D3hot, 0);
5338         pci_enable_wake(pdev, PCI_D3cold, 0);
5339
5340         e1000_reset(adapter);
5341         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5342
5343         return PCI_ERS_RESULT_RECOVERED;
5344 }
5345
5346 /**
5347  * e1000_io_resume - called when traffic can start flowing again.
5348  * @pdev: Pointer to PCI device
5349  *
5350  * This callback is called when the error recovery driver tells us that
5351  * its OK to resume normal operation. Implementation resembles the
5352  * second-half of the e1000_resume routine.
5353  */
5354 static void e1000_io_resume(struct pci_dev *pdev)
5355 {
5356         struct net_device *netdev = pci_get_drvdata(pdev);
5357         struct e1000_adapter *adapter = netdev->priv;
5358
5359         e1000_init_manageability(adapter);
5360
5361         if (netif_running(netdev)) {
5362                 if (e1000_up(adapter)) {
5363                         printk("e1000: can't bring device back up after reset\n");
5364                         return;
5365                 }
5366         }
5367
5368         netif_device_attach(netdev);
5369
5370         /* If the controller is 82573 and f/w is AMT, do not set
5371          * DRV_LOAD until the interface is up.  For all other cases,
5372          * let the f/w know that the h/w is now under the control
5373          * of the driver. */
5374         if (adapter->hw.mac_type != e1000_82573 ||
5375             !e1000_check_mng_mode(&adapter->hw))
5376                 e1000_get_hw_control(adapter);
5377
5378 }
5379
5380 /* e1000_main.c */