e1000: use flush_work_keventd()
[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 (!vlan_group_get_device(adapter->vlgrp, 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                             !vlan_group_get_device(adapter->vlgrp, 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
413         /* Let firmware taken over control of h/w */
414         switch (adapter->hw.mac_type) {
415         case e1000_82573:
416                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
417                 E1000_WRITE_REG(&adapter->hw, SWSM,
418                                 swsm & ~E1000_SWSM_DRV_LOAD);
419                 break;
420         case e1000_82571:
421         case e1000_82572:
422         case e1000_80003es2lan:
423         case e1000_ich8lan:
424                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
425                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
426                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
427                 break;
428         default:
429                 break;
430         }
431 }
432
433 /**
434  * e1000_get_hw_control - get control of the h/w from f/w
435  * @adapter: address of board private structure
436  *
437  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
438  * For ASF and Pass Through versions of f/w this means that
439  * the driver is loaded. For AMT version (only with 82573)
440  * of the f/w this means that the network i/f is open.
441  *
442  **/
443
444 static void
445 e1000_get_hw_control(struct e1000_adapter *adapter)
446 {
447         uint32_t ctrl_ext;
448         uint32_t swsm;
449
450         /* Let firmware know the driver has taken over */
451         switch (adapter->hw.mac_type) {
452         case e1000_82573:
453                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
454                 E1000_WRITE_REG(&adapter->hw, SWSM,
455                                 swsm | E1000_SWSM_DRV_LOAD);
456                 break;
457         case e1000_82571:
458         case e1000_82572:
459         case e1000_80003es2lan:
460         case e1000_ich8lan:
461                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
462                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
463                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
464                 break;
465         default:
466                 break;
467         }
468 }
469
470 static void
471 e1000_init_manageability(struct e1000_adapter *adapter)
472 {
473         if (adapter->en_mng_pt) {
474                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
475
476                 /* disable hardware interception of ARP */
477                 manc &= ~(E1000_MANC_ARP_EN);
478
479                 /* enable receiving management packets to the host */
480                 /* this will probably generate destination unreachable messages
481                  * from the host OS, but the packets will be handled on SMBUS */
482                 if (adapter->hw.has_manc2h) {
483                         uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);
484
485                         manc |= E1000_MANC_EN_MNG2HOST;
486 #define E1000_MNG2HOST_PORT_623 (1 << 5)
487 #define E1000_MNG2HOST_PORT_664 (1 << 6)
488                         manc2h |= E1000_MNG2HOST_PORT_623;
489                         manc2h |= E1000_MNG2HOST_PORT_664;
490                         E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
491                 }
492
493                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
494         }
495 }
496
497 static void
498 e1000_release_manageability(struct e1000_adapter *adapter)
499 {
500         if (adapter->en_mng_pt) {
501                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
502
503                 /* re-enable hardware interception of ARP */
504                 manc |= E1000_MANC_ARP_EN;
505
506                 if (adapter->hw.has_manc2h)
507                         manc &= ~E1000_MANC_EN_MNG2HOST;
508
509                 /* don't explicitly have to mess with MANC2H since
510                  * MANC has an enable disable that gates MANC2H */
511
512                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
513         }
514 }
515
516 /**
517  * e1000_configure - configure the hardware for RX and TX
518  * @adapter = private board structure
519  **/
520 static void e1000_configure(struct e1000_adapter *adapter)
521 {
522         struct net_device *netdev = adapter->netdev;
523         int i;
524
525         e1000_set_multi(netdev);
526
527         e1000_restore_vlan(adapter);
528         e1000_init_manageability(adapter);
529
530         e1000_configure_tx(adapter);
531         e1000_setup_rctl(adapter);
532         e1000_configure_rx(adapter);
533         /* call E1000_DESC_UNUSED which always leaves
534          * at least 1 descriptor unused to make sure
535          * next_to_use != next_to_clean */
536         for (i = 0; i < adapter->num_rx_queues; i++) {
537                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
538                 adapter->alloc_rx_buf(adapter, ring,
539                                       E1000_DESC_UNUSED(ring));
540         }
541
542         adapter->tx_queue_len = netdev->tx_queue_len;
543 }
544
545 int e1000_up(struct e1000_adapter *adapter)
546 {
547         /* hardware has been reset, we need to reload some things */
548         e1000_configure(adapter);
549
550         clear_bit(__E1000_DOWN, &adapter->flags);
551
552 #ifdef CONFIG_E1000_NAPI
553         netif_poll_enable(adapter->netdev);
554 #endif
555         e1000_irq_enable(adapter);
556
557         /* fire a link change interrupt to start the watchdog */
558         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
559         return 0;
560 }
561
562 /**
563  * e1000_power_up_phy - restore link in case the phy was powered down
564  * @adapter: address of board private structure
565  *
566  * The phy may be powered down to save power and turn off link when the
567  * driver is unloaded and wake on lan is not enabled (among others)
568  * *** this routine MUST be followed by a call to e1000_reset ***
569  *
570  **/
571
572 void e1000_power_up_phy(struct e1000_adapter *adapter)
573 {
574         uint16_t mii_reg = 0;
575
576         /* Just clear the power down bit to wake the phy back up */
577         if (adapter->hw.media_type == e1000_media_type_copper) {
578                 /* according to the manual, the phy will retain its
579                  * settings across a power-down/up cycle */
580                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
581                 mii_reg &= ~MII_CR_POWER_DOWN;
582                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
583         }
584 }
585
586 static void e1000_power_down_phy(struct e1000_adapter *adapter)
587 {
588         /* Power down the PHY so no link is implied when interface is down *
589          * The PHY cannot be powered down if any of the following is TRUE *
590          * (a) WoL is enabled
591          * (b) AMT is active
592          * (c) SoL/IDER session is active */
593         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
594            adapter->hw.media_type == e1000_media_type_copper) {
595                 uint16_t mii_reg = 0;
596
597                 switch (adapter->hw.mac_type) {
598                 case e1000_82540:
599                 case e1000_82545:
600                 case e1000_82545_rev_3:
601                 case e1000_82546:
602                 case e1000_82546_rev_3:
603                 case e1000_82541:
604                 case e1000_82541_rev_2:
605                 case e1000_82547:
606                 case e1000_82547_rev_2:
607                         if (E1000_READ_REG(&adapter->hw, MANC) &
608                             E1000_MANC_SMBUS_EN)
609                                 goto out;
610                         break;
611                 case e1000_82571:
612                 case e1000_82572:
613                 case e1000_82573:
614                 case e1000_80003es2lan:
615                 case e1000_ich8lan:
616                         if (e1000_check_mng_mode(&adapter->hw) ||
617                             e1000_check_phy_reset_block(&adapter->hw))
618                                 goto out;
619                         break;
620                 default:
621                         goto out;
622                 }
623                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
624                 mii_reg |= MII_CR_POWER_DOWN;
625                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
626                 mdelay(1);
627         }
628 out:
629         return;
630 }
631
632 void
633 e1000_down(struct e1000_adapter *adapter)
634 {
635         struct net_device *netdev = adapter->netdev;
636
637         /* signal that we're down so the interrupt handler does not
638          * reschedule our watchdog timer */
639         set_bit(__E1000_DOWN, &adapter->flags);
640
641 #ifdef CONFIG_E1000_NAPI
642         netif_poll_disable(netdev);
643 #endif
644         e1000_irq_disable(adapter);
645
646         del_timer_sync(&adapter->tx_fifo_stall_timer);
647         del_timer_sync(&adapter->watchdog_timer);
648         del_timer_sync(&adapter->phy_info_timer);
649
650         netdev->tx_queue_len = adapter->tx_queue_len;
651         adapter->link_speed = 0;
652         adapter->link_duplex = 0;
653         netif_carrier_off(netdev);
654         netif_stop_queue(netdev);
655
656         e1000_reset(adapter);
657         e1000_clean_all_tx_rings(adapter);
658         e1000_clean_all_rx_rings(adapter);
659 }
660
661 void
662 e1000_reinit_locked(struct e1000_adapter *adapter)
663 {
664         WARN_ON(in_interrupt());
665         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
666                 msleep(1);
667         e1000_down(adapter);
668         e1000_up(adapter);
669         clear_bit(__E1000_RESETTING, &adapter->flags);
670 }
671
672 void
673 e1000_reset(struct e1000_adapter *adapter)
674 {
675         uint32_t pba = 0, tx_space, min_tx_space, min_rx_space;
676         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
677         boolean_t legacy_pba_adjust = FALSE;
678
679         /* Repartition Pba for greater than 9k mtu
680          * To take effect CTRL.RST is required.
681          */
682
683         switch (adapter->hw.mac_type) {
684         case e1000_82542_rev2_0:
685         case e1000_82542_rev2_1:
686         case e1000_82543:
687         case e1000_82544:
688         case e1000_82540:
689         case e1000_82541:
690         case e1000_82541_rev_2:
691                 legacy_pba_adjust = TRUE;
692                 pba = E1000_PBA_48K;
693                 break;
694         case e1000_82545:
695         case e1000_82545_rev_3:
696         case e1000_82546:
697         case e1000_82546_rev_3:
698                 pba = E1000_PBA_48K;
699                 break;
700         case e1000_82547:
701         case e1000_82547_rev_2:
702                 legacy_pba_adjust = TRUE;
703                 pba = E1000_PBA_30K;
704                 break;
705         case e1000_82571:
706         case e1000_82572:
707         case e1000_80003es2lan:
708                 pba = E1000_PBA_38K;
709                 break;
710         case e1000_82573:
711                 pba = E1000_PBA_20K;
712                 break;
713         case e1000_ich8lan:
714                 pba = E1000_PBA_8K;
715         case e1000_undefined:
716         case e1000_num_macs:
717                 break;
718         }
719
720         if (legacy_pba_adjust == TRUE) {
721                 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
722                         pba -= 8; /* allocate more FIFO for Tx */
723
724                 if (adapter->hw.mac_type == e1000_82547) {
725                         adapter->tx_fifo_head = 0;
726                         adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
727                         adapter->tx_fifo_size =
728                                 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
729                         atomic_set(&adapter->tx_fifo_stall, 0);
730                 }
731         } else if (adapter->hw.max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
732                 /* adjust PBA for jumbo frames */
733                 E1000_WRITE_REG(&adapter->hw, PBA, pba);
734
735                 /* To maintain wire speed transmits, the Tx FIFO should be
736                  * large enough to accomodate two full transmit packets,
737                  * rounded up to the next 1KB and expressed in KB.  Likewise,
738                  * the Rx FIFO should be large enough to accomodate at least
739                  * one full receive packet and is similarly rounded up and
740                  * expressed in KB. */
741                 pba = E1000_READ_REG(&adapter->hw, PBA);
742                 /* upper 16 bits has Tx packet buffer allocation size in KB */
743                 tx_space = pba >> 16;
744                 /* lower 16 bits has Rx packet buffer allocation size in KB */
745                 pba &= 0xffff;
746                 /* don't include ethernet FCS because hardware appends/strips */
747                 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
748                                VLAN_TAG_SIZE;
749                 min_tx_space = min_rx_space;
750                 min_tx_space *= 2;
751                 min_tx_space = ALIGN(min_tx_space, 1024);
752                 min_tx_space >>= 10;
753                 min_rx_space = ALIGN(min_rx_space, 1024);
754                 min_rx_space >>= 10;
755
756                 /* If current Tx allocation is less than the min Tx FIFO size,
757                  * and the min Tx FIFO size is less than the current Rx FIFO
758                  * allocation, take space away from current Rx allocation */
759                 if (tx_space < min_tx_space &&
760                     ((min_tx_space - tx_space) < pba)) {
761                         pba = pba - (min_tx_space - tx_space);
762
763                         /* PCI/PCIx hardware has PBA alignment constraints */
764                         switch (adapter->hw.mac_type) {
765                         case e1000_82545 ... e1000_82546_rev_3:
766                                 pba &= ~(E1000_PBA_8K - 1);
767                                 break;
768                         default:
769                                 break;
770                         }
771
772                         /* if short on rx space, rx wins and must trump tx
773                          * adjustment or use Early Receive if available */
774                         if (pba < min_rx_space) {
775                                 switch (adapter->hw.mac_type) {
776                                 case e1000_82573:
777                                         /* ERT enabled in e1000_configure_rx */
778                                         break;
779                                 default:
780                                         pba = min_rx_space;
781                                         break;
782                                 }
783                         }
784                 }
785         }
786
787         E1000_WRITE_REG(&adapter->hw, PBA, pba);
788
789         /* flow control settings */
790         /* Set the FC high water mark to 90% of the FIFO size.
791          * Required to clear last 3 LSB */
792         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
793         /* We can't use 90% on small FIFOs because the remainder
794          * would be less than 1 full frame.  In this case, we size
795          * it to allow at least a full frame above the high water
796          *  mark. */
797         if (pba < E1000_PBA_16K)
798                 fc_high_water_mark = (pba * 1024) - 1600;
799
800         adapter->hw.fc_high_water = fc_high_water_mark;
801         adapter->hw.fc_low_water = fc_high_water_mark - 8;
802         if (adapter->hw.mac_type == e1000_80003es2lan)
803                 adapter->hw.fc_pause_time = 0xFFFF;
804         else
805                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
806         adapter->hw.fc_send_xon = 1;
807         adapter->hw.fc = adapter->hw.original_fc;
808
809         /* Allow time for pending master requests to run */
810         e1000_reset_hw(&adapter->hw);
811         if (adapter->hw.mac_type >= e1000_82544)
812                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
813
814         if (e1000_init_hw(&adapter->hw))
815                 DPRINTK(PROBE, ERR, "Hardware Error\n");
816         e1000_update_mng_vlan(adapter);
817
818         /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
819         if (adapter->hw.mac_type >= e1000_82544 &&
820             adapter->hw.mac_type <= e1000_82547_rev_2 &&
821             adapter->hw.autoneg == 1 &&
822             adapter->hw.autoneg_advertised == ADVERTISE_1000_FULL) {
823                 uint32_t ctrl = E1000_READ_REG(&adapter->hw, CTRL);
824                 /* clear phy power management bit if we are in gig only mode,
825                  * which if enabled will attempt negotiation to 100Mb, which
826                  * can cause a loss of link at power off or driver unload */
827                 ctrl &= ~E1000_CTRL_SWDPIN3;
828                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
829         }
830
831         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
832         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
833
834         e1000_reset_adaptive(&adapter->hw);
835         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
836
837         if (!adapter->smart_power_down &&
838             (adapter->hw.mac_type == e1000_82571 ||
839              adapter->hw.mac_type == e1000_82572)) {
840                 uint16_t phy_data = 0;
841                 /* speed up time to link by disabling smart power down, ignore
842                  * the return value of this function because there is nothing
843                  * different we would do if it failed */
844                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
845                                    &phy_data);
846                 phy_data &= ~IGP02E1000_PM_SPD;
847                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
848                                     phy_data);
849         }
850
851         e1000_release_manageability(adapter);
852 }
853
854 /**
855  * e1000_probe - Device Initialization Routine
856  * @pdev: PCI device information struct
857  * @ent: entry in e1000_pci_tbl
858  *
859  * Returns 0 on success, negative on failure
860  *
861  * e1000_probe initializes an adapter identified by a pci_dev structure.
862  * The OS initialization, configuring of the adapter private structure,
863  * and a hardware reset occur.
864  **/
865
866 static int __devinit
867 e1000_probe(struct pci_dev *pdev,
868             const struct pci_device_id *ent)
869 {
870         struct net_device *netdev;
871         struct e1000_adapter *adapter;
872         unsigned long mmio_start, mmio_len;
873         unsigned long flash_start, flash_len;
874
875         static int cards_found = 0;
876         static int global_quad_port_a = 0; /* global ksp3 port a indication */
877         int i, err, pci_using_dac;
878         uint16_t eeprom_data = 0;
879         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
880         if ((err = pci_enable_device(pdev)))
881                 return err;
882
883         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
884             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
885                 pci_using_dac = 1;
886         } else {
887                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
888                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
889                         E1000_ERR("No usable DMA configuration, aborting\n");
890                         goto err_dma;
891                 }
892                 pci_using_dac = 0;
893         }
894
895         if ((err = pci_request_regions(pdev, e1000_driver_name)))
896                 goto err_pci_reg;
897
898         pci_set_master(pdev);
899
900         err = -ENOMEM;
901         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
902         if (!netdev)
903                 goto err_alloc_etherdev;
904
905         SET_MODULE_OWNER(netdev);
906         SET_NETDEV_DEV(netdev, &pdev->dev);
907
908         pci_set_drvdata(pdev, netdev);
909         adapter = netdev_priv(netdev);
910         adapter->netdev = netdev;
911         adapter->pdev = pdev;
912         adapter->hw.back = adapter;
913         adapter->msg_enable = (1 << debug) - 1;
914
915         mmio_start = pci_resource_start(pdev, BAR_0);
916         mmio_len = pci_resource_len(pdev, BAR_0);
917
918         err = -EIO;
919         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
920         if (!adapter->hw.hw_addr)
921                 goto err_ioremap;
922
923         for (i = BAR_1; i <= BAR_5; i++) {
924                 if (pci_resource_len(pdev, i) == 0)
925                         continue;
926                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
927                         adapter->hw.io_base = pci_resource_start(pdev, i);
928                         break;
929                 }
930         }
931
932         netdev->open = &e1000_open;
933         netdev->stop = &e1000_close;
934         netdev->hard_start_xmit = &e1000_xmit_frame;
935         netdev->get_stats = &e1000_get_stats;
936         netdev->set_multicast_list = &e1000_set_multi;
937         netdev->set_mac_address = &e1000_set_mac;
938         netdev->change_mtu = &e1000_change_mtu;
939         netdev->do_ioctl = &e1000_ioctl;
940         e1000_set_ethtool_ops(netdev);
941         netdev->tx_timeout = &e1000_tx_timeout;
942         netdev->watchdog_timeo = 5 * HZ;
943 #ifdef CONFIG_E1000_NAPI
944         netdev->poll = &e1000_clean;
945         netdev->weight = 64;
946 #endif
947         netdev->vlan_rx_register = e1000_vlan_rx_register;
948         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
949         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
950 #ifdef CONFIG_NET_POLL_CONTROLLER
951         netdev->poll_controller = e1000_netpoll;
952 #endif
953         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
954
955         netdev->mem_start = mmio_start;
956         netdev->mem_end = mmio_start + mmio_len;
957         netdev->base_addr = adapter->hw.io_base;
958
959         adapter->bd_number = cards_found;
960
961         /* setup the private structure */
962
963         if ((err = e1000_sw_init(adapter)))
964                 goto err_sw_init;
965
966         err = -EIO;
967         /* Flash BAR mapping must happen after e1000_sw_init
968          * because it depends on mac_type */
969         if ((adapter->hw.mac_type == e1000_ich8lan) &&
970            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
971                 flash_start = pci_resource_start(pdev, 1);
972                 flash_len = pci_resource_len(pdev, 1);
973                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
974                 if (!adapter->hw.flash_address)
975                         goto err_flashmap;
976         }
977
978         if (e1000_check_phy_reset_block(&adapter->hw))
979                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
980
981         if (adapter->hw.mac_type >= e1000_82543) {
982                 netdev->features = NETIF_F_SG |
983                                    NETIF_F_HW_CSUM |
984                                    NETIF_F_HW_VLAN_TX |
985                                    NETIF_F_HW_VLAN_RX |
986                                    NETIF_F_HW_VLAN_FILTER;
987                 if (adapter->hw.mac_type == e1000_ich8lan)
988                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
989         }
990
991         if ((adapter->hw.mac_type >= e1000_82544) &&
992            (adapter->hw.mac_type != e1000_82547))
993                 netdev->features |= NETIF_F_TSO;
994
995         if (adapter->hw.mac_type > e1000_82547_rev_2)
996                 netdev->features |= NETIF_F_TSO6;
997         if (pci_using_dac)
998                 netdev->features |= NETIF_F_HIGHDMA;
999
1000         netdev->features |= NETIF_F_LLTX;
1001
1002         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
1003
1004         /* initialize eeprom parameters */
1005
1006         if (e1000_init_eeprom_params(&adapter->hw)) {
1007                 E1000_ERR("EEPROM initialization failed\n");
1008                 goto err_eeprom;
1009         }
1010
1011         /* before reading the EEPROM, reset the controller to
1012          * put the device in a known good starting state */
1013
1014         e1000_reset_hw(&adapter->hw);
1015
1016         /* make sure the EEPROM is good */
1017
1018         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
1019                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1020                 goto err_eeprom;
1021         }
1022
1023         /* copy the MAC address out of the EEPROM */
1024
1025         if (e1000_read_mac_addr(&adapter->hw))
1026                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1027         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
1028         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
1029
1030         if (!is_valid_ether_addr(netdev->perm_addr)) {
1031                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1032                 goto err_eeprom;
1033         }
1034
1035         e1000_get_bus_info(&adapter->hw);
1036
1037         init_timer(&adapter->tx_fifo_stall_timer);
1038         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1039         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
1040
1041         init_timer(&adapter->watchdog_timer);
1042         adapter->watchdog_timer.function = &e1000_watchdog;
1043         adapter->watchdog_timer.data = (unsigned long) adapter;
1044
1045         init_timer(&adapter->phy_info_timer);
1046         adapter->phy_info_timer.function = &e1000_update_phy_info;
1047         adapter->phy_info_timer.data = (unsigned long) adapter;
1048
1049         INIT_WORK(&adapter->reset_task, e1000_reset_task);
1050
1051         e1000_check_options(adapter);
1052
1053         /* Initial Wake on LAN setting
1054          * If APM wake is enabled in the EEPROM,
1055          * enable the ACPI Magic Packet filter
1056          */
1057
1058         switch (adapter->hw.mac_type) {
1059         case e1000_82542_rev2_0:
1060         case e1000_82542_rev2_1:
1061         case e1000_82543:
1062                 break;
1063         case e1000_82544:
1064                 e1000_read_eeprom(&adapter->hw,
1065                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1066                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1067                 break;
1068         case e1000_ich8lan:
1069                 e1000_read_eeprom(&adapter->hw,
1070                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1071                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1072                 break;
1073         case e1000_82546:
1074         case e1000_82546_rev_3:
1075         case e1000_82571:
1076         case e1000_80003es2lan:
1077                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1078                         e1000_read_eeprom(&adapter->hw,
1079                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1080                         break;
1081                 }
1082                 /* Fall Through */
1083         default:
1084                 e1000_read_eeprom(&adapter->hw,
1085                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1086                 break;
1087         }
1088         if (eeprom_data & eeprom_apme_mask)
1089                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1090
1091         /* now that we have the eeprom settings, apply the special cases
1092          * where the eeprom may be wrong or the board simply won't support
1093          * wake on lan on a particular port */
1094         switch (pdev->device) {
1095         case E1000_DEV_ID_82546GB_PCIE:
1096                 adapter->eeprom_wol = 0;
1097                 break;
1098         case E1000_DEV_ID_82546EB_FIBER:
1099         case E1000_DEV_ID_82546GB_FIBER:
1100         case E1000_DEV_ID_82571EB_FIBER:
1101                 /* Wake events only supported on port A for dual fiber
1102                  * regardless of eeprom setting */
1103                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
1104                         adapter->eeprom_wol = 0;
1105                 break;
1106         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1107         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1108         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1109                 /* if quad port adapter, disable WoL on all but port A */
1110                 if (global_quad_port_a != 0)
1111                         adapter->eeprom_wol = 0;
1112                 else
1113                         adapter->quad_port_a = 1;
1114                 /* Reset for multiple quad port adapters */
1115                 if (++global_quad_port_a == 4)
1116                         global_quad_port_a = 0;
1117                 break;
1118         }
1119
1120         /* initialize the wol settings based on the eeprom settings */
1121         adapter->wol = adapter->eeprom_wol;
1122
1123         /* print bus type/speed/width info */
1124         {
1125         struct e1000_hw *hw = &adapter->hw;
1126         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1127                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1128                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1129                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1130                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1131                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1132                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1133                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1134                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1135                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1136                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1137                  "32-bit"));
1138         }
1139
1140         for (i = 0; i < 6; i++)
1141                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
1142
1143         /* reset the hardware with the new settings */
1144         e1000_reset(adapter);
1145
1146         /* If the controller is 82573 and f/w is AMT, do not set
1147          * DRV_LOAD until the interface is up.  For all other cases,
1148          * let the f/w know that the h/w is now under the control
1149          * of the driver. */
1150         if (adapter->hw.mac_type != e1000_82573 ||
1151             !e1000_check_mng_mode(&adapter->hw))
1152                 e1000_get_hw_control(adapter);
1153
1154         strcpy(netdev->name, "eth%d");
1155         if ((err = register_netdev(netdev)))
1156                 goto err_register;
1157
1158         /* tell the stack to leave us alone until e1000_open() is called */
1159         netif_carrier_off(netdev);
1160         netif_stop_queue(netdev);
1161
1162         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1163
1164         cards_found++;
1165         return 0;
1166
1167 err_register:
1168         e1000_release_hw_control(adapter);
1169 err_eeprom:
1170         if (!e1000_check_phy_reset_block(&adapter->hw))
1171                 e1000_phy_hw_reset(&adapter->hw);
1172
1173         if (adapter->hw.flash_address)
1174                 iounmap(adapter->hw.flash_address);
1175 err_flashmap:
1176 #ifdef CONFIG_E1000_NAPI
1177         for (i = 0; i < adapter->num_rx_queues; i++)
1178                 dev_put(&adapter->polling_netdev[i]);
1179 #endif
1180
1181         kfree(adapter->tx_ring);
1182         kfree(adapter->rx_ring);
1183 #ifdef CONFIG_E1000_NAPI
1184         kfree(adapter->polling_netdev);
1185 #endif
1186 err_sw_init:
1187         iounmap(adapter->hw.hw_addr);
1188 err_ioremap:
1189         free_netdev(netdev);
1190 err_alloc_etherdev:
1191         pci_release_regions(pdev);
1192 err_pci_reg:
1193 err_dma:
1194         pci_disable_device(pdev);
1195         return err;
1196 }
1197
1198 /**
1199  * e1000_remove - Device Removal Routine
1200  * @pdev: PCI device information struct
1201  *
1202  * e1000_remove is called by the PCI subsystem to alert the driver
1203  * that it should release a PCI device.  The could be caused by a
1204  * Hot-Plug event, or because the driver is going to be removed from
1205  * memory.
1206  **/
1207
1208 static void __devexit
1209 e1000_remove(struct pci_dev *pdev)
1210 {
1211         struct net_device *netdev = pci_get_drvdata(pdev);
1212         struct e1000_adapter *adapter = netdev_priv(netdev);
1213 #ifdef CONFIG_E1000_NAPI
1214         int i;
1215 #endif
1216
1217         flush_work_keventd(&adapter->reset_task);
1218
1219         e1000_release_manageability(adapter);
1220
1221         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1222          * would have already happened in close and is redundant. */
1223         e1000_release_hw_control(adapter);
1224
1225         unregister_netdev(netdev);
1226 #ifdef CONFIG_E1000_NAPI
1227         for (i = 0; i < adapter->num_rx_queues; i++)
1228                 dev_put(&adapter->polling_netdev[i]);
1229 #endif
1230
1231         if (!e1000_check_phy_reset_block(&adapter->hw))
1232                 e1000_phy_hw_reset(&adapter->hw);
1233
1234         kfree(adapter->tx_ring);
1235         kfree(adapter->rx_ring);
1236 #ifdef CONFIG_E1000_NAPI
1237         kfree(adapter->polling_netdev);
1238 #endif
1239
1240         iounmap(adapter->hw.hw_addr);
1241         if (adapter->hw.flash_address)
1242                 iounmap(adapter->hw.flash_address);
1243         pci_release_regions(pdev);
1244
1245         free_netdev(netdev);
1246
1247         pci_disable_device(pdev);
1248 }
1249
1250 /**
1251  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1252  * @adapter: board private structure to initialize
1253  *
1254  * e1000_sw_init initializes the Adapter private data structure.
1255  * Fields are initialized based on PCI device information and
1256  * OS network device settings (MTU size).
1257  **/
1258
1259 static int __devinit
1260 e1000_sw_init(struct e1000_adapter *adapter)
1261 {
1262         struct e1000_hw *hw = &adapter->hw;
1263         struct net_device *netdev = adapter->netdev;
1264         struct pci_dev *pdev = adapter->pdev;
1265 #ifdef CONFIG_E1000_NAPI
1266         int i;
1267 #endif
1268
1269         /* PCI config space info */
1270
1271         hw->vendor_id = pdev->vendor;
1272         hw->device_id = pdev->device;
1273         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1274         hw->subsystem_id = pdev->subsystem_device;
1275
1276         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1277
1278         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1279
1280         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1281         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1282         hw->max_frame_size = netdev->mtu +
1283                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1284         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1285
1286         /* identify the MAC */
1287
1288         if (e1000_set_mac_type(hw)) {
1289                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1290                 return -EIO;
1291         }
1292
1293         switch (hw->mac_type) {
1294         default:
1295                 break;
1296         case e1000_82541:
1297         case e1000_82547:
1298         case e1000_82541_rev_2:
1299         case e1000_82547_rev_2:
1300                 hw->phy_init_script = 1;
1301                 break;
1302         }
1303
1304         e1000_set_media_type(hw);
1305
1306         hw->wait_autoneg_complete = FALSE;
1307         hw->tbi_compatibility_en = TRUE;
1308         hw->adaptive_ifs = TRUE;
1309
1310         /* Copper options */
1311
1312         if (hw->media_type == e1000_media_type_copper) {
1313                 hw->mdix = AUTO_ALL_MODES;
1314                 hw->disable_polarity_correction = FALSE;
1315                 hw->master_slave = E1000_MASTER_SLAVE;
1316         }
1317
1318         adapter->num_tx_queues = 1;
1319         adapter->num_rx_queues = 1;
1320
1321         if (e1000_alloc_queues(adapter)) {
1322                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1323                 return -ENOMEM;
1324         }
1325
1326 #ifdef CONFIG_E1000_NAPI
1327         for (i = 0; i < adapter->num_rx_queues; i++) {
1328                 adapter->polling_netdev[i].priv = adapter;
1329                 adapter->polling_netdev[i].poll = &e1000_clean;
1330                 adapter->polling_netdev[i].weight = 64;
1331                 dev_hold(&adapter->polling_netdev[i]);
1332                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1333         }
1334         spin_lock_init(&adapter->tx_queue_lock);
1335 #endif
1336
1337         atomic_set(&adapter->irq_sem, 1);
1338         spin_lock_init(&adapter->stats_lock);
1339
1340         set_bit(__E1000_DOWN, &adapter->flags);
1341
1342         return 0;
1343 }
1344
1345 /**
1346  * e1000_alloc_queues - Allocate memory for all rings
1347  * @adapter: board private structure to initialize
1348  *
1349  * We allocate one ring per queue at run-time since we don't know the
1350  * number of queues at compile-time.  The polling_netdev array is
1351  * intended for Multiqueue, but should work fine with a single queue.
1352  **/
1353
1354 static int __devinit
1355 e1000_alloc_queues(struct e1000_adapter *adapter)
1356 {
1357         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1358                                    sizeof(struct e1000_tx_ring), GFP_KERNEL);
1359         if (!adapter->tx_ring)
1360                 return -ENOMEM;
1361
1362         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1363                                    sizeof(struct e1000_rx_ring), GFP_KERNEL);
1364         if (!adapter->rx_ring) {
1365                 kfree(adapter->tx_ring);
1366                 return -ENOMEM;
1367         }
1368
1369 #ifdef CONFIG_E1000_NAPI
1370         adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1371                                           sizeof(struct net_device),
1372                                           GFP_KERNEL);
1373         if (!adapter->polling_netdev) {
1374                 kfree(adapter->tx_ring);
1375                 kfree(adapter->rx_ring);
1376                 return -ENOMEM;
1377         }
1378 #endif
1379
1380         return E1000_SUCCESS;
1381 }
1382
1383 /**
1384  * e1000_open - Called when a network interface is made active
1385  * @netdev: network interface device structure
1386  *
1387  * Returns 0 on success, negative value on failure
1388  *
1389  * The open entry point is called when a network interface is made
1390  * active by the system (IFF_UP).  At this point all resources needed
1391  * for transmit and receive operations are allocated, the interrupt
1392  * handler is registered with the OS, the watchdog timer is started,
1393  * and the stack is notified that the interface is ready.
1394  **/
1395
1396 static int
1397 e1000_open(struct net_device *netdev)
1398 {
1399         struct e1000_adapter *adapter = netdev_priv(netdev);
1400         int err;
1401
1402         /* disallow open during test */
1403         if (test_bit(__E1000_TESTING, &adapter->flags))
1404                 return -EBUSY;
1405
1406         /* allocate transmit descriptors */
1407         err = e1000_setup_all_tx_resources(adapter);
1408         if (err)
1409                 goto err_setup_tx;
1410
1411         /* allocate receive descriptors */
1412         err = e1000_setup_all_rx_resources(adapter);
1413         if (err)
1414                 goto err_setup_rx;
1415
1416         e1000_power_up_phy(adapter);
1417
1418         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1419         if ((adapter->hw.mng_cookie.status &
1420                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1421                 e1000_update_mng_vlan(adapter);
1422         }
1423
1424         /* If AMT is enabled, let the firmware know that the network
1425          * interface is now open */
1426         if (adapter->hw.mac_type == e1000_82573 &&
1427             e1000_check_mng_mode(&adapter->hw))
1428                 e1000_get_hw_control(adapter);
1429
1430         /* before we allocate an interrupt, we must be ready to handle it.
1431          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1432          * as soon as we call pci_request_irq, so we have to setup our
1433          * clean_rx handler before we do so.  */
1434         e1000_configure(adapter);
1435
1436         err = e1000_request_irq(adapter);
1437         if (err)
1438                 goto err_req_irq;
1439
1440         /* From here on the code is the same as e1000_up() */
1441         clear_bit(__E1000_DOWN, &adapter->flags);
1442
1443 #ifdef CONFIG_E1000_NAPI
1444         netif_poll_enable(netdev);
1445 #endif
1446
1447         e1000_irq_enable(adapter);
1448
1449         /* fire a link status change interrupt to start the watchdog */
1450         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
1451
1452         return E1000_SUCCESS;
1453
1454 err_req_irq:
1455         e1000_release_hw_control(adapter);
1456         e1000_power_down_phy(adapter);
1457         e1000_free_all_rx_resources(adapter);
1458 err_setup_rx:
1459         e1000_free_all_tx_resources(adapter);
1460 err_setup_tx:
1461         e1000_reset(adapter);
1462
1463         return err;
1464 }
1465
1466 /**
1467  * e1000_close - Disables a network interface
1468  * @netdev: network interface device structure
1469  *
1470  * Returns 0, this is not allowed to fail
1471  *
1472  * The close entry point is called when an interface is de-activated
1473  * by the OS.  The hardware is still under the drivers control, but
1474  * needs to be disabled.  A global MAC reset is issued to stop the
1475  * hardware, and all transmit and receive resources are freed.
1476  **/
1477
1478 static int
1479 e1000_close(struct net_device *netdev)
1480 {
1481         struct e1000_adapter *adapter = netdev_priv(netdev);
1482
1483         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1484         e1000_down(adapter);
1485         e1000_power_down_phy(adapter);
1486         e1000_free_irq(adapter);
1487
1488         e1000_free_all_tx_resources(adapter);
1489         e1000_free_all_rx_resources(adapter);
1490
1491         /* kill manageability vlan ID if supported, but not if a vlan with
1492          * the same ID is registered on the host OS (let 8021q kill it) */
1493         if ((adapter->hw.mng_cookie.status &
1494                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1495              !(adapter->vlgrp &&
1496                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1497                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1498         }
1499
1500         /* If AMT is enabled, let the firmware know that the network
1501          * interface is now closed */
1502         if (adapter->hw.mac_type == e1000_82573 &&
1503             e1000_check_mng_mode(&adapter->hw))
1504                 e1000_release_hw_control(adapter);
1505
1506         return 0;
1507 }
1508
1509 /**
1510  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1511  * @adapter: address of board private structure
1512  * @start: address of beginning of memory
1513  * @len: length of memory
1514  **/
1515 static boolean_t
1516 e1000_check_64k_bound(struct e1000_adapter *adapter,
1517                       void *start, unsigned long len)
1518 {
1519         unsigned long begin = (unsigned long) start;
1520         unsigned long end = begin + len;
1521
1522         /* First rev 82545 and 82546 need to not allow any memory
1523          * write location to cross 64k boundary due to errata 23 */
1524         if (adapter->hw.mac_type == e1000_82545 ||
1525             adapter->hw.mac_type == e1000_82546) {
1526                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1527         }
1528
1529         return TRUE;
1530 }
1531
1532 /**
1533  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1534  * @adapter: board private structure
1535  * @txdr:    tx descriptor ring (for a specific queue) to setup
1536  *
1537  * Return 0 on success, negative on failure
1538  **/
1539
1540 static int
1541 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1542                          struct e1000_tx_ring *txdr)
1543 {
1544         struct pci_dev *pdev = adapter->pdev;
1545         int size;
1546
1547         size = sizeof(struct e1000_buffer) * txdr->count;
1548         txdr->buffer_info = vmalloc(size);
1549         if (!txdr->buffer_info) {
1550                 DPRINTK(PROBE, ERR,
1551                 "Unable to allocate memory for the transmit descriptor ring\n");
1552                 return -ENOMEM;
1553         }
1554         memset(txdr->buffer_info, 0, size);
1555
1556         /* round up to nearest 4K */
1557
1558         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1559         txdr->size = ALIGN(txdr->size, 4096);
1560
1561         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1562         if (!txdr->desc) {
1563 setup_tx_desc_die:
1564                 vfree(txdr->buffer_info);
1565                 DPRINTK(PROBE, ERR,
1566                 "Unable to allocate memory for the transmit descriptor ring\n");
1567                 return -ENOMEM;
1568         }
1569
1570         /* Fix for errata 23, can't cross 64kB boundary */
1571         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1572                 void *olddesc = txdr->desc;
1573                 dma_addr_t olddma = txdr->dma;
1574                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1575                                      "at %p\n", txdr->size, txdr->desc);
1576                 /* Try again, without freeing the previous */
1577                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1578                 /* Failed allocation, critical failure */
1579                 if (!txdr->desc) {
1580                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1581                         goto setup_tx_desc_die;
1582                 }
1583
1584                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1585                         /* give up */
1586                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1587                                             txdr->dma);
1588                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1589                         DPRINTK(PROBE, ERR,
1590                                 "Unable to allocate aligned memory "
1591                                 "for the transmit descriptor ring\n");
1592                         vfree(txdr->buffer_info);
1593                         return -ENOMEM;
1594                 } else {
1595                         /* Free old allocation, new allocation was successful */
1596                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1597                 }
1598         }
1599         memset(txdr->desc, 0, txdr->size);
1600
1601         txdr->next_to_use = 0;
1602         txdr->next_to_clean = 0;
1603         spin_lock_init(&txdr->tx_lock);
1604
1605         return 0;
1606 }
1607
1608 /**
1609  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1610  *                                (Descriptors) for all queues
1611  * @adapter: board private structure
1612  *
1613  * Return 0 on success, negative on failure
1614  **/
1615
1616 int
1617 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1618 {
1619         int i, err = 0;
1620
1621         for (i = 0; i < adapter->num_tx_queues; i++) {
1622                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1623                 if (err) {
1624                         DPRINTK(PROBE, ERR,
1625                                 "Allocation for Tx Queue %u failed\n", i);
1626                         for (i-- ; i >= 0; i--)
1627                                 e1000_free_tx_resources(adapter,
1628                                                         &adapter->tx_ring[i]);
1629                         break;
1630                 }
1631         }
1632
1633         return err;
1634 }
1635
1636 /**
1637  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1638  * @adapter: board private structure
1639  *
1640  * Configure the Tx unit of the MAC after a reset.
1641  **/
1642
1643 static void
1644 e1000_configure_tx(struct e1000_adapter *adapter)
1645 {
1646         uint64_t tdba;
1647         struct e1000_hw *hw = &adapter->hw;
1648         uint32_t tdlen, tctl, tipg, tarc;
1649         uint32_t ipgr1, ipgr2;
1650
1651         /* Setup the HW Tx Head and Tail descriptor pointers */
1652
1653         switch (adapter->num_tx_queues) {
1654         case 1:
1655         default:
1656                 tdba = adapter->tx_ring[0].dma;
1657                 tdlen = adapter->tx_ring[0].count *
1658                         sizeof(struct e1000_tx_desc);
1659                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1660                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1661                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1662                 E1000_WRITE_REG(hw, TDT, 0);
1663                 E1000_WRITE_REG(hw, TDH, 0);
1664                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1665                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1666                 break;
1667         }
1668
1669         /* Set the default values for the Tx Inter Packet Gap timer */
1670         if (adapter->hw.mac_type <= e1000_82547_rev_2 &&
1671             (hw->media_type == e1000_media_type_fiber ||
1672              hw->media_type == e1000_media_type_internal_serdes))
1673                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1674         else
1675                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1676
1677         switch (hw->mac_type) {
1678         case e1000_82542_rev2_0:
1679         case e1000_82542_rev2_1:
1680                 tipg = DEFAULT_82542_TIPG_IPGT;
1681                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1682                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1683                 break;
1684         case e1000_80003es2lan:
1685                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1686                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1687                 break;
1688         default:
1689                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1690                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1691                 break;
1692         }
1693         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1694         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1695         E1000_WRITE_REG(hw, TIPG, tipg);
1696
1697         /* Set the Tx Interrupt Delay register */
1698
1699         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1700         if (hw->mac_type >= e1000_82540)
1701                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1702
1703         /* Program the Transmit Control Register */
1704
1705         tctl = E1000_READ_REG(hw, TCTL);
1706         tctl &= ~E1000_TCTL_CT;
1707         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1708                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1709
1710         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1711                 tarc = E1000_READ_REG(hw, TARC0);
1712                 /* set the speed mode bit, we'll clear it if we're not at
1713                  * gigabit link later */
1714                 tarc |= (1 << 21);
1715                 E1000_WRITE_REG(hw, TARC0, tarc);
1716         } else if (hw->mac_type == e1000_80003es2lan) {
1717                 tarc = E1000_READ_REG(hw, TARC0);
1718                 tarc |= 1;
1719                 E1000_WRITE_REG(hw, TARC0, tarc);
1720                 tarc = E1000_READ_REG(hw, TARC1);
1721                 tarc |= 1;
1722                 E1000_WRITE_REG(hw, TARC1, tarc);
1723         }
1724
1725         e1000_config_collision_dist(hw);
1726
1727         /* Setup Transmit Descriptor Settings for eop descriptor */
1728         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1729
1730         /* only set IDE if we are delaying interrupts using the timers */
1731         if (adapter->tx_int_delay)
1732                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1733
1734         if (hw->mac_type < e1000_82543)
1735                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1736         else
1737                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1738
1739         /* Cache if we're 82544 running in PCI-X because we'll
1740          * need this to apply a workaround later in the send path. */
1741         if (hw->mac_type == e1000_82544 &&
1742             hw->bus_type == e1000_bus_type_pcix)
1743                 adapter->pcix_82544 = 1;
1744
1745         E1000_WRITE_REG(hw, TCTL, tctl);
1746
1747 }
1748
1749 /**
1750  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1751  * @adapter: board private structure
1752  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1753  *
1754  * Returns 0 on success, negative on failure
1755  **/
1756
1757 static int
1758 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1759                          struct e1000_rx_ring *rxdr)
1760 {
1761         struct pci_dev *pdev = adapter->pdev;
1762         int size, desc_len;
1763
1764         size = sizeof(struct e1000_buffer) * rxdr->count;
1765         rxdr->buffer_info = vmalloc(size);
1766         if (!rxdr->buffer_info) {
1767                 DPRINTK(PROBE, ERR,
1768                 "Unable to allocate memory for the receive descriptor ring\n");
1769                 return -ENOMEM;
1770         }
1771         memset(rxdr->buffer_info, 0, size);
1772
1773         rxdr->ps_page = kcalloc(rxdr->count, sizeof(struct e1000_ps_page),
1774                                 GFP_KERNEL);
1775         if (!rxdr->ps_page) {
1776                 vfree(rxdr->buffer_info);
1777                 DPRINTK(PROBE, ERR,
1778                 "Unable to allocate memory for the receive descriptor ring\n");
1779                 return -ENOMEM;
1780         }
1781
1782         rxdr->ps_page_dma = kcalloc(rxdr->count,
1783                                     sizeof(struct e1000_ps_page_dma),
1784                                     GFP_KERNEL);
1785         if (!rxdr->ps_page_dma) {
1786                 vfree(rxdr->buffer_info);
1787                 kfree(rxdr->ps_page);
1788                 DPRINTK(PROBE, ERR,
1789                 "Unable to allocate memory for the receive descriptor ring\n");
1790                 return -ENOMEM;
1791         }
1792
1793         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1794                 desc_len = sizeof(struct e1000_rx_desc);
1795         else
1796                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1797
1798         /* Round up to nearest 4K */
1799
1800         rxdr->size = rxdr->count * desc_len;
1801         rxdr->size = ALIGN(rxdr->size, 4096);
1802
1803         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1804
1805         if (!rxdr->desc) {
1806                 DPRINTK(PROBE, ERR,
1807                 "Unable to allocate memory for the receive descriptor ring\n");
1808 setup_rx_desc_die:
1809                 vfree(rxdr->buffer_info);
1810                 kfree(rxdr->ps_page);
1811                 kfree(rxdr->ps_page_dma);
1812                 return -ENOMEM;
1813         }
1814
1815         /* Fix for errata 23, can't cross 64kB boundary */
1816         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1817                 void *olddesc = rxdr->desc;
1818                 dma_addr_t olddma = rxdr->dma;
1819                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1820                                      "at %p\n", rxdr->size, rxdr->desc);
1821                 /* Try again, without freeing the previous */
1822                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1823                 /* Failed allocation, critical failure */
1824                 if (!rxdr->desc) {
1825                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1826                         DPRINTK(PROBE, ERR,
1827                                 "Unable to allocate memory "
1828                                 "for the receive descriptor ring\n");
1829                         goto setup_rx_desc_die;
1830                 }
1831
1832                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1833                         /* give up */
1834                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1835                                             rxdr->dma);
1836                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1837                         DPRINTK(PROBE, ERR,
1838                                 "Unable to allocate aligned memory "
1839                                 "for the receive descriptor ring\n");
1840                         goto setup_rx_desc_die;
1841                 } else {
1842                         /* Free old allocation, new allocation was successful */
1843                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1844                 }
1845         }
1846         memset(rxdr->desc, 0, rxdr->size);
1847
1848         rxdr->next_to_clean = 0;
1849         rxdr->next_to_use = 0;
1850
1851         return 0;
1852 }
1853
1854 /**
1855  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1856  *                                (Descriptors) for all queues
1857  * @adapter: board private structure
1858  *
1859  * Return 0 on success, negative on failure
1860  **/
1861
1862 int
1863 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1864 {
1865         int i, err = 0;
1866
1867         for (i = 0; i < adapter->num_rx_queues; i++) {
1868                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1869                 if (err) {
1870                         DPRINTK(PROBE, ERR,
1871                                 "Allocation for Rx Queue %u failed\n", i);
1872                         for (i-- ; i >= 0; i--)
1873                                 e1000_free_rx_resources(adapter,
1874                                                         &adapter->rx_ring[i]);
1875                         break;
1876                 }
1877         }
1878
1879         return err;
1880 }
1881
1882 /**
1883  * e1000_setup_rctl - configure the receive control registers
1884  * @adapter: Board private structure
1885  **/
1886 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1887                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1888 static void
1889 e1000_setup_rctl(struct e1000_adapter *adapter)
1890 {
1891         uint32_t rctl, rfctl;
1892         uint32_t psrctl = 0;
1893 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1894         uint32_t pages = 0;
1895 #endif
1896
1897         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1898
1899         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1900
1901         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1902                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1903                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1904
1905         if (adapter->hw.tbi_compatibility_on == 1)
1906                 rctl |= E1000_RCTL_SBP;
1907         else
1908                 rctl &= ~E1000_RCTL_SBP;
1909
1910         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1911                 rctl &= ~E1000_RCTL_LPE;
1912         else
1913                 rctl |= E1000_RCTL_LPE;
1914
1915         /* Setup buffer sizes */
1916         rctl &= ~E1000_RCTL_SZ_4096;
1917         rctl |= E1000_RCTL_BSEX;
1918         switch (adapter->rx_buffer_len) {
1919                 case E1000_RXBUFFER_256:
1920                         rctl |= E1000_RCTL_SZ_256;
1921                         rctl &= ~E1000_RCTL_BSEX;
1922                         break;
1923                 case E1000_RXBUFFER_512:
1924                         rctl |= E1000_RCTL_SZ_512;
1925                         rctl &= ~E1000_RCTL_BSEX;
1926                         break;
1927                 case E1000_RXBUFFER_1024:
1928                         rctl |= E1000_RCTL_SZ_1024;
1929                         rctl &= ~E1000_RCTL_BSEX;
1930                         break;
1931                 case E1000_RXBUFFER_2048:
1932                 default:
1933                         rctl |= E1000_RCTL_SZ_2048;
1934                         rctl &= ~E1000_RCTL_BSEX;
1935                         break;
1936                 case E1000_RXBUFFER_4096:
1937                         rctl |= E1000_RCTL_SZ_4096;
1938                         break;
1939                 case E1000_RXBUFFER_8192:
1940                         rctl |= E1000_RCTL_SZ_8192;
1941                         break;
1942                 case E1000_RXBUFFER_16384:
1943                         rctl |= E1000_RCTL_SZ_16384;
1944                         break;
1945         }
1946
1947 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1948         /* 82571 and greater support packet-split where the protocol
1949          * header is placed in skb->data and the packet data is
1950          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1951          * In the case of a non-split, skb->data is linearly filled,
1952          * followed by the page buffers.  Therefore, skb->data is
1953          * sized to hold the largest protocol header.
1954          */
1955         /* allocations using alloc_page take too long for regular MTU
1956          * so only enable packet split for jumbo frames */
1957         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1958         if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
1959             PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
1960                 adapter->rx_ps_pages = pages;
1961         else
1962                 adapter->rx_ps_pages = 0;
1963 #endif
1964         if (adapter->rx_ps_pages) {
1965                 /* Configure extra packet-split registers */
1966                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1967                 rfctl |= E1000_RFCTL_EXTEN;
1968                 /* disable packet split support for IPv6 extension headers,
1969                  * because some malformed IPv6 headers can hang the RX */
1970                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
1971                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
1972
1973                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1974
1975                 rctl |= E1000_RCTL_DTYP_PS;
1976
1977                 psrctl |= adapter->rx_ps_bsize0 >>
1978                         E1000_PSRCTL_BSIZE0_SHIFT;
1979
1980                 switch (adapter->rx_ps_pages) {
1981                 case 3:
1982                         psrctl |= PAGE_SIZE <<
1983                                 E1000_PSRCTL_BSIZE3_SHIFT;
1984                 case 2:
1985                         psrctl |= PAGE_SIZE <<
1986                                 E1000_PSRCTL_BSIZE2_SHIFT;
1987                 case 1:
1988                         psrctl |= PAGE_SIZE >>
1989                                 E1000_PSRCTL_BSIZE1_SHIFT;
1990                         break;
1991                 }
1992
1993                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1994         }
1995
1996         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1997 }
1998
1999 /**
2000  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
2001  * @adapter: board private structure
2002  *
2003  * Configure the Rx unit of the MAC after a reset.
2004  **/
2005
2006 static void
2007 e1000_configure_rx(struct e1000_adapter *adapter)
2008 {
2009         uint64_t rdba;
2010         struct e1000_hw *hw = &adapter->hw;
2011         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
2012
2013         if (adapter->rx_ps_pages) {
2014                 /* this is a 32 byte descriptor */
2015                 rdlen = adapter->rx_ring[0].count *
2016                         sizeof(union e1000_rx_desc_packet_split);
2017                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2018                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2019         } else {
2020                 rdlen = adapter->rx_ring[0].count *
2021                         sizeof(struct e1000_rx_desc);
2022                 adapter->clean_rx = e1000_clean_rx_irq;
2023                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2024         }
2025
2026         /* disable receives while setting up the descriptors */
2027         rctl = E1000_READ_REG(hw, RCTL);
2028         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
2029
2030         /* set the Receive Delay Timer Register */
2031         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
2032
2033         if (hw->mac_type >= e1000_82540) {
2034                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
2035                 if (adapter->itr_setting != 0)
2036                         E1000_WRITE_REG(hw, ITR,
2037                                 1000000000 / (adapter->itr * 256));
2038         }
2039
2040         if (hw->mac_type >= e1000_82571) {
2041                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
2042                 /* Reset delay timers after every interrupt */
2043                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2044 #ifdef CONFIG_E1000_NAPI
2045                 /* Auto-Mask interrupts upon ICR access */
2046                 ctrl_ext |= E1000_CTRL_EXT_IAME;
2047                 E1000_WRITE_REG(hw, IAM, 0xffffffff);
2048 #endif
2049                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
2050                 E1000_WRITE_FLUSH(hw);
2051         }
2052
2053         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2054          * the Base and Length of the Rx Descriptor Ring */
2055         switch (adapter->num_rx_queues) {
2056         case 1:
2057         default:
2058                 rdba = adapter->rx_ring[0].dma;
2059                 E1000_WRITE_REG(hw, RDLEN, rdlen);
2060                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
2061                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
2062                 E1000_WRITE_REG(hw, RDT, 0);
2063                 E1000_WRITE_REG(hw, RDH, 0);
2064                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2065                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2066                 break;
2067         }
2068
2069         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2070         if (hw->mac_type >= e1000_82543) {
2071                 rxcsum = E1000_READ_REG(hw, RXCSUM);
2072                 if (adapter->rx_csum == TRUE) {
2073                         rxcsum |= E1000_RXCSUM_TUOFL;
2074
2075                         /* Enable 82571 IPv4 payload checksum for UDP fragments
2076                          * Must be used in conjunction with packet-split. */
2077                         if ((hw->mac_type >= e1000_82571) &&
2078                             (adapter->rx_ps_pages)) {
2079                                 rxcsum |= E1000_RXCSUM_IPPCSE;
2080                         }
2081                 } else {
2082                         rxcsum &= ~E1000_RXCSUM_TUOFL;
2083                         /* don't need to clear IPPCSE as it defaults to 0 */
2084                 }
2085                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
2086         }
2087
2088         /* enable early receives on 82573, only takes effect if using > 2048
2089          * byte total frame size.  for example only for jumbo frames */
2090 #define E1000_ERT_2048 0x100
2091         if (hw->mac_type == e1000_82573)
2092                 E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
2093
2094         /* Enable Receives */
2095         E1000_WRITE_REG(hw, RCTL, rctl);
2096 }
2097
2098 /**
2099  * e1000_free_tx_resources - Free Tx Resources per Queue
2100  * @adapter: board private structure
2101  * @tx_ring: Tx descriptor ring for a specific queue
2102  *
2103  * Free all transmit software resources
2104  **/
2105
2106 static void
2107 e1000_free_tx_resources(struct e1000_adapter *adapter,
2108                         struct e1000_tx_ring *tx_ring)
2109 {
2110         struct pci_dev *pdev = adapter->pdev;
2111
2112         e1000_clean_tx_ring(adapter, tx_ring);
2113
2114         vfree(tx_ring->buffer_info);
2115         tx_ring->buffer_info = NULL;
2116
2117         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2118
2119         tx_ring->desc = NULL;
2120 }
2121
2122 /**
2123  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2124  * @adapter: board private structure
2125  *
2126  * Free all transmit software resources
2127  **/
2128
2129 void
2130 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2131 {
2132         int i;
2133
2134         for (i = 0; i < adapter->num_tx_queues; i++)
2135                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2136 }
2137
2138 static void
2139 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2140                         struct e1000_buffer *buffer_info)
2141 {
2142         if (buffer_info->dma) {
2143                 pci_unmap_page(adapter->pdev,
2144                                 buffer_info->dma,
2145                                 buffer_info->length,
2146                                 PCI_DMA_TODEVICE);
2147                 buffer_info->dma = 0;
2148         }
2149         if (buffer_info->skb) {
2150                 dev_kfree_skb_any(buffer_info->skb);
2151                 buffer_info->skb = NULL;
2152         }
2153         /* buffer_info must be completely set up in the transmit path */
2154 }
2155
2156 /**
2157  * e1000_clean_tx_ring - Free Tx Buffers
2158  * @adapter: board private structure
2159  * @tx_ring: ring to be cleaned
2160  **/
2161
2162 static void
2163 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2164                     struct e1000_tx_ring *tx_ring)
2165 {
2166         struct e1000_buffer *buffer_info;
2167         unsigned long size;
2168         unsigned int i;
2169
2170         /* Free all the Tx ring sk_buffs */
2171
2172         for (i = 0; i < tx_ring->count; i++) {
2173                 buffer_info = &tx_ring->buffer_info[i];
2174                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2175         }
2176
2177         size = sizeof(struct e1000_buffer) * tx_ring->count;
2178         memset(tx_ring->buffer_info, 0, size);
2179
2180         /* Zero out the descriptor ring */
2181
2182         memset(tx_ring->desc, 0, tx_ring->size);
2183
2184         tx_ring->next_to_use = 0;
2185         tx_ring->next_to_clean = 0;
2186         tx_ring->last_tx_tso = 0;
2187
2188         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2189         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2190 }
2191
2192 /**
2193  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2194  * @adapter: board private structure
2195  **/
2196
2197 static void
2198 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2199 {
2200         int i;
2201
2202         for (i = 0; i < adapter->num_tx_queues; i++)
2203                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2204 }
2205
2206 /**
2207  * e1000_free_rx_resources - Free Rx Resources
2208  * @adapter: board private structure
2209  * @rx_ring: ring to clean the resources from
2210  *
2211  * Free all receive software resources
2212  **/
2213
2214 static void
2215 e1000_free_rx_resources(struct e1000_adapter *adapter,
2216                         struct e1000_rx_ring *rx_ring)
2217 {
2218         struct pci_dev *pdev = adapter->pdev;
2219
2220         e1000_clean_rx_ring(adapter, rx_ring);
2221
2222         vfree(rx_ring->buffer_info);
2223         rx_ring->buffer_info = NULL;
2224         kfree(rx_ring->ps_page);
2225         rx_ring->ps_page = NULL;
2226         kfree(rx_ring->ps_page_dma);
2227         rx_ring->ps_page_dma = NULL;
2228
2229         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2230
2231         rx_ring->desc = NULL;
2232 }
2233
2234 /**
2235  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2236  * @adapter: board private structure
2237  *
2238  * Free all receive software resources
2239  **/
2240
2241 void
2242 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2243 {
2244         int i;
2245
2246         for (i = 0; i < adapter->num_rx_queues; i++)
2247                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2248 }
2249
2250 /**
2251  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2252  * @adapter: board private structure
2253  * @rx_ring: ring to free buffers from
2254  **/
2255
2256 static void
2257 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2258                     struct e1000_rx_ring *rx_ring)
2259 {
2260         struct e1000_buffer *buffer_info;
2261         struct e1000_ps_page *ps_page;
2262         struct e1000_ps_page_dma *ps_page_dma;
2263         struct pci_dev *pdev = adapter->pdev;
2264         unsigned long size;
2265         unsigned int i, j;
2266
2267         /* Free all the Rx ring sk_buffs */
2268         for (i = 0; i < rx_ring->count; i++) {
2269                 buffer_info = &rx_ring->buffer_info[i];
2270                 if (buffer_info->skb) {
2271                         pci_unmap_single(pdev,
2272                                          buffer_info->dma,
2273                                          buffer_info->length,
2274                                          PCI_DMA_FROMDEVICE);
2275
2276                         dev_kfree_skb(buffer_info->skb);
2277                         buffer_info->skb = NULL;
2278                 }
2279                 ps_page = &rx_ring->ps_page[i];
2280                 ps_page_dma = &rx_ring->ps_page_dma[i];
2281                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2282                         if (!ps_page->ps_page[j]) break;
2283                         pci_unmap_page(pdev,
2284                                        ps_page_dma->ps_page_dma[j],
2285                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2286                         ps_page_dma->ps_page_dma[j] = 0;
2287                         put_page(ps_page->ps_page[j]);
2288                         ps_page->ps_page[j] = NULL;
2289                 }
2290         }
2291
2292         size = sizeof(struct e1000_buffer) * rx_ring->count;
2293         memset(rx_ring->buffer_info, 0, size);
2294         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2295         memset(rx_ring->ps_page, 0, size);
2296         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2297         memset(rx_ring->ps_page_dma, 0, size);
2298
2299         /* Zero out the descriptor ring */
2300
2301         memset(rx_ring->desc, 0, rx_ring->size);
2302
2303         rx_ring->next_to_clean = 0;
2304         rx_ring->next_to_use = 0;
2305
2306         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2307         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2308 }
2309
2310 /**
2311  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2312  * @adapter: board private structure
2313  **/
2314
2315 static void
2316 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2317 {
2318         int i;
2319
2320         for (i = 0; i < adapter->num_rx_queues; i++)
2321                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2322 }
2323
2324 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2325  * and memory write and invalidate disabled for certain operations
2326  */
2327 static void
2328 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2329 {
2330         struct net_device *netdev = adapter->netdev;
2331         uint32_t rctl;
2332
2333         e1000_pci_clear_mwi(&adapter->hw);
2334
2335         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2336         rctl |= E1000_RCTL_RST;
2337         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2338         E1000_WRITE_FLUSH(&adapter->hw);
2339         mdelay(5);
2340
2341         if (netif_running(netdev))
2342                 e1000_clean_all_rx_rings(adapter);
2343 }
2344
2345 static void
2346 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2347 {
2348         struct net_device *netdev = adapter->netdev;
2349         uint32_t rctl;
2350
2351         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2352         rctl &= ~E1000_RCTL_RST;
2353         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2354         E1000_WRITE_FLUSH(&adapter->hw);
2355         mdelay(5);
2356
2357         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2358                 e1000_pci_set_mwi(&adapter->hw);
2359
2360         if (netif_running(netdev)) {
2361                 /* No need to loop, because 82542 supports only 1 queue */
2362                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2363                 e1000_configure_rx(adapter);
2364                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2365         }
2366 }
2367
2368 /**
2369  * e1000_set_mac - Change the Ethernet Address of the NIC
2370  * @netdev: network interface device structure
2371  * @p: pointer to an address structure
2372  *
2373  * Returns 0 on success, negative on failure
2374  **/
2375
2376 static int
2377 e1000_set_mac(struct net_device *netdev, void *p)
2378 {
2379         struct e1000_adapter *adapter = netdev_priv(netdev);
2380         struct sockaddr *addr = p;
2381
2382         if (!is_valid_ether_addr(addr->sa_data))
2383                 return -EADDRNOTAVAIL;
2384
2385         /* 82542 2.0 needs to be in reset to write receive address registers */
2386
2387         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2388                 e1000_enter_82542_rst(adapter);
2389
2390         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2391         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2392
2393         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2394
2395         /* With 82571 controllers, LAA may be overwritten (with the default)
2396          * due to controller reset from the other port. */
2397         if (adapter->hw.mac_type == e1000_82571) {
2398                 /* activate the work around */
2399                 adapter->hw.laa_is_present = 1;
2400
2401                 /* Hold a copy of the LAA in RAR[14] This is done so that
2402                  * between the time RAR[0] gets clobbered  and the time it
2403                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2404                  * of the RARs and no incoming packets directed to this port
2405                  * are dropped. Eventaully the LAA will be in RAR[0] and
2406                  * RAR[14] */
2407                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2408                                         E1000_RAR_ENTRIES - 1);
2409         }
2410
2411         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2412                 e1000_leave_82542_rst(adapter);
2413
2414         return 0;
2415 }
2416
2417 /**
2418  * e1000_set_multi - Multicast and Promiscuous mode set
2419  * @netdev: network interface device structure
2420  *
2421  * The set_multi entry point is called whenever the multicast address
2422  * list or the network interface flags are updated.  This routine is
2423  * responsible for configuring the hardware for proper multicast,
2424  * promiscuous mode, and all-multi behavior.
2425  **/
2426
2427 static void
2428 e1000_set_multi(struct net_device *netdev)
2429 {
2430         struct e1000_adapter *adapter = netdev_priv(netdev);
2431         struct e1000_hw *hw = &adapter->hw;
2432         struct dev_mc_list *mc_ptr;
2433         uint32_t rctl;
2434         uint32_t hash_value;
2435         int i, rar_entries = E1000_RAR_ENTRIES;
2436         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2437                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2438                                 E1000_NUM_MTA_REGISTERS;
2439
2440         if (adapter->hw.mac_type == e1000_ich8lan)
2441                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2442
2443         /* reserve RAR[14] for LAA over-write work-around */
2444         if (adapter->hw.mac_type == e1000_82571)
2445                 rar_entries--;
2446
2447         /* Check for Promiscuous and All Multicast modes */
2448
2449         rctl = E1000_READ_REG(hw, RCTL);
2450
2451         if (netdev->flags & IFF_PROMISC) {
2452                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2453         } else if (netdev->flags & IFF_ALLMULTI) {
2454                 rctl |= E1000_RCTL_MPE;
2455                 rctl &= ~E1000_RCTL_UPE;
2456         } else {
2457                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2458         }
2459
2460         E1000_WRITE_REG(hw, RCTL, rctl);
2461
2462         /* 82542 2.0 needs to be in reset to write receive address registers */
2463
2464         if (hw->mac_type == e1000_82542_rev2_0)
2465                 e1000_enter_82542_rst(adapter);
2466
2467         /* load the first 14 multicast address into the exact filters 1-14
2468          * RAR 0 is used for the station MAC adddress
2469          * if there are not 14 addresses, go ahead and clear the filters
2470          * -- with 82571 controllers only 0-13 entries are filled here
2471          */
2472         mc_ptr = netdev->mc_list;
2473
2474         for (i = 1; i < rar_entries; i++) {
2475                 if (mc_ptr) {
2476                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2477                         mc_ptr = mc_ptr->next;
2478                 } else {
2479                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2480                         E1000_WRITE_FLUSH(hw);
2481                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2482                         E1000_WRITE_FLUSH(hw);
2483                 }
2484         }
2485
2486         /* clear the old settings from the multicast hash table */
2487
2488         for (i = 0; i < mta_reg_count; i++) {
2489                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2490                 E1000_WRITE_FLUSH(hw);
2491         }
2492
2493         /* load any remaining addresses into the hash table */
2494
2495         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2496                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2497                 e1000_mta_set(hw, hash_value);
2498         }
2499
2500         if (hw->mac_type == e1000_82542_rev2_0)
2501                 e1000_leave_82542_rst(adapter);
2502 }
2503
2504 /* Need to wait a few seconds after link up to get diagnostic information from
2505  * the phy */
2506
2507 static void
2508 e1000_update_phy_info(unsigned long data)
2509 {
2510         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2511         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2512 }
2513
2514 /**
2515  * e1000_82547_tx_fifo_stall - Timer Call-back
2516  * @data: pointer to adapter cast into an unsigned long
2517  **/
2518
2519 static void
2520 e1000_82547_tx_fifo_stall(unsigned long data)
2521 {
2522         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2523         struct net_device *netdev = adapter->netdev;
2524         uint32_t tctl;
2525
2526         if (atomic_read(&adapter->tx_fifo_stall)) {
2527                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2528                     E1000_READ_REG(&adapter->hw, TDH)) &&
2529                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2530                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2531                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2532                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2533                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2534                         E1000_WRITE_REG(&adapter->hw, TCTL,
2535                                         tctl & ~E1000_TCTL_EN);
2536                         E1000_WRITE_REG(&adapter->hw, TDFT,
2537                                         adapter->tx_head_addr);
2538                         E1000_WRITE_REG(&adapter->hw, TDFH,
2539                                         adapter->tx_head_addr);
2540                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2541                                         adapter->tx_head_addr);
2542                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2543                                         adapter->tx_head_addr);
2544                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2545                         E1000_WRITE_FLUSH(&adapter->hw);
2546
2547                         adapter->tx_fifo_head = 0;
2548                         atomic_set(&adapter->tx_fifo_stall, 0);
2549                         netif_wake_queue(netdev);
2550                 } else {
2551                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2552                 }
2553         }
2554 }
2555
2556 /**
2557  * e1000_watchdog - Timer Call-back
2558  * @data: pointer to adapter cast into an unsigned long
2559  **/
2560 static void
2561 e1000_watchdog(unsigned long data)
2562 {
2563         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2564         struct net_device *netdev = adapter->netdev;
2565         struct e1000_tx_ring *txdr = adapter->tx_ring;
2566         uint32_t link, tctl;
2567         int32_t ret_val;
2568
2569         ret_val = e1000_check_for_link(&adapter->hw);
2570         if ((ret_val == E1000_ERR_PHY) &&
2571             (adapter->hw.phy_type == e1000_phy_igp_3) &&
2572             (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2573                 /* See e1000_kumeran_lock_loss_workaround() */
2574                 DPRINTK(LINK, INFO,
2575                         "Gigabit has been disabled, downgrading speed\n");
2576         }
2577
2578         if (adapter->hw.mac_type == e1000_82573) {
2579                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2580                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2581                         e1000_update_mng_vlan(adapter);
2582         }
2583
2584         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2585            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2586                 link = !adapter->hw.serdes_link_down;
2587         else
2588                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2589
2590         if (link) {
2591                 if (!netif_carrier_ok(netdev)) {
2592                         uint32_t ctrl;
2593                         boolean_t txb2b = 1;
2594                         e1000_get_speed_and_duplex(&adapter->hw,
2595                                                    &adapter->link_speed,
2596                                                    &adapter->link_duplex);
2597
2598                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2599                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2600                                 "Flow Control: %s\n",
2601                                 adapter->link_speed,
2602                                 adapter->link_duplex == FULL_DUPLEX ?
2603                                 "Full Duplex" : "Half Duplex",
2604                                 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2605                                 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2606                                 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2607                                 E1000_CTRL_TFCE) ? "TX" : "None" )));
2608
2609                         /* tweak tx_queue_len according to speed/duplex
2610                          * and adjust the timeout factor */
2611                         netdev->tx_queue_len = adapter->tx_queue_len;
2612                         adapter->tx_timeout_factor = 1;
2613                         switch (adapter->link_speed) {
2614                         case SPEED_10:
2615                                 txb2b = 0;
2616                                 netdev->tx_queue_len = 10;
2617                                 adapter->tx_timeout_factor = 8;
2618                                 break;
2619                         case SPEED_100:
2620                                 txb2b = 0;
2621                                 netdev->tx_queue_len = 100;
2622                                 /* maybe add some timeout factor ? */
2623                                 break;
2624                         }
2625
2626                         if ((adapter->hw.mac_type == e1000_82571 ||
2627                              adapter->hw.mac_type == e1000_82572) &&
2628                             txb2b == 0) {
2629                                 uint32_t tarc0;
2630                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2631                                 tarc0 &= ~(1 << 21);
2632                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2633                         }
2634
2635                         /* disable TSO for pcie and 10/100 speeds, to avoid
2636                          * some hardware issues */
2637                         if (!adapter->tso_force &&
2638                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2639                                 switch (adapter->link_speed) {
2640                                 case SPEED_10:
2641                                 case SPEED_100:
2642                                         DPRINTK(PROBE,INFO,
2643                                         "10/100 speed: disabling TSO\n");
2644                                         netdev->features &= ~NETIF_F_TSO;
2645                                         netdev->features &= ~NETIF_F_TSO6;
2646                                         break;
2647                                 case SPEED_1000:
2648                                         netdev->features |= NETIF_F_TSO;
2649                                         netdev->features |= NETIF_F_TSO6;
2650                                         break;
2651                                 default:
2652                                         /* oops */
2653                                         break;
2654                                 }
2655                         }
2656
2657                         /* enable transmits in the hardware, need to do this
2658                          * after setting TARC0 */
2659                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2660                         tctl |= E1000_TCTL_EN;
2661                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2662
2663                         netif_carrier_on(netdev);
2664                         netif_wake_queue(netdev);
2665                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2666                         adapter->smartspeed = 0;
2667                 } else {
2668                         /* make sure the receive unit is started */
2669                         if (adapter->hw.rx_needs_kicking) {
2670                                 struct e1000_hw *hw = &adapter->hw;
2671                                 uint32_t rctl = E1000_READ_REG(hw, RCTL);
2672                                 E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
2673                         }
2674                 }
2675         } else {
2676                 if (netif_carrier_ok(netdev)) {
2677                         adapter->link_speed = 0;
2678                         adapter->link_duplex = 0;
2679                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2680                         netif_carrier_off(netdev);
2681                         netif_stop_queue(netdev);
2682                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2683
2684                         /* 80003ES2LAN workaround--
2685                          * For packet buffer work-around on link down event;
2686                          * disable receives in the ISR and
2687                          * reset device here in the watchdog
2688                          */
2689                         if (adapter->hw.mac_type == e1000_80003es2lan)
2690                                 /* reset device */
2691                                 schedule_work(&adapter->reset_task);
2692                 }
2693
2694                 e1000_smartspeed(adapter);
2695         }
2696
2697         e1000_update_stats(adapter);
2698
2699         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2700         adapter->tpt_old = adapter->stats.tpt;
2701         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2702         adapter->colc_old = adapter->stats.colc;
2703
2704         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2705         adapter->gorcl_old = adapter->stats.gorcl;
2706         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2707         adapter->gotcl_old = adapter->stats.gotcl;
2708
2709         e1000_update_adaptive(&adapter->hw);
2710
2711         if (!netif_carrier_ok(netdev)) {
2712                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2713                         /* We've lost link, so the controller stops DMA,
2714                          * but we've got queued Tx work that's never going
2715                          * to get done, so reset controller to flush Tx.
2716                          * (Do the reset outside of interrupt context). */
2717                         adapter->tx_timeout_count++;
2718                         schedule_work(&adapter->reset_task);
2719                 }
2720         }
2721
2722         /* Cause software interrupt to ensure rx ring is cleaned */
2723         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2724
2725         /* Force detection of hung controller every watchdog period */
2726         adapter->detect_tx_hung = TRUE;
2727
2728         /* With 82571 controllers, LAA may be overwritten due to controller
2729          * reset from the other port. Set the appropriate LAA in RAR[0] */
2730         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2731                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2732
2733         /* Reset the timer */
2734         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2735 }
2736
2737 enum latency_range {
2738         lowest_latency = 0,
2739         low_latency = 1,
2740         bulk_latency = 2,
2741         latency_invalid = 255
2742 };
2743
2744 /**
2745  * e1000_update_itr - update the dynamic ITR value based on statistics
2746  *      Stores a new ITR value based on packets and byte
2747  *      counts during the last interrupt.  The advantage of per interrupt
2748  *      computation is faster updates and more accurate ITR for the current
2749  *      traffic pattern.  Constants in this function were computed
2750  *      based on theoretical maximum wire speed and thresholds were set based
2751  *      on testing data as well as attempting to minimize response time
2752  *      while increasing bulk throughput.
2753  *      this functionality is controlled by the InterruptThrottleRate module
2754  *      parameter (see e1000_param.c)
2755  * @adapter: pointer to adapter
2756  * @itr_setting: current adapter->itr
2757  * @packets: the number of packets during this measurement interval
2758  * @bytes: the number of bytes during this measurement interval
2759  **/
2760 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2761                                    uint16_t itr_setting,
2762                                    int packets,
2763                                    int bytes)
2764 {
2765         unsigned int retval = itr_setting;
2766         struct e1000_hw *hw = &adapter->hw;
2767
2768         if (unlikely(hw->mac_type < e1000_82540))
2769                 goto update_itr_done;
2770
2771         if (packets == 0)
2772                 goto update_itr_done;
2773
2774         switch (itr_setting) {
2775         case lowest_latency:
2776                 /* jumbo frames get bulk treatment*/
2777                 if (bytes/packets > 8000)
2778                         retval = bulk_latency;
2779                 else if ((packets < 5) && (bytes > 512))
2780                         retval = low_latency;
2781                 break;
2782         case low_latency:  /* 50 usec aka 20000 ints/s */
2783                 if (bytes > 10000) {
2784                         /* jumbo frames need bulk latency setting */
2785                         if (bytes/packets > 8000)
2786                                 retval = bulk_latency;
2787                         else if ((packets < 10) || ((bytes/packets) > 1200))
2788                                 retval = bulk_latency;
2789                         else if ((packets > 35))
2790                                 retval = lowest_latency;
2791                 } else if (bytes/packets > 2000)
2792                         retval = bulk_latency;
2793                 else if (packets <= 2 && bytes < 512)
2794                         retval = lowest_latency;
2795                 break;
2796         case bulk_latency: /* 250 usec aka 4000 ints/s */
2797                 if (bytes > 25000) {
2798                         if (packets > 35)
2799                                 retval = low_latency;
2800                 } else if (bytes < 6000) {
2801                         retval = low_latency;
2802                 }
2803                 break;
2804         }
2805
2806 update_itr_done:
2807         return retval;
2808 }
2809
2810 static void e1000_set_itr(struct e1000_adapter *adapter)
2811 {
2812         struct e1000_hw *hw = &adapter->hw;
2813         uint16_t current_itr;
2814         uint32_t new_itr = adapter->itr;
2815
2816         if (unlikely(hw->mac_type < e1000_82540))
2817                 return;
2818
2819         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2820         if (unlikely(adapter->link_speed != SPEED_1000)) {
2821                 current_itr = 0;
2822                 new_itr = 4000;
2823                 goto set_itr_now;
2824         }
2825
2826         adapter->tx_itr = e1000_update_itr(adapter,
2827                                     adapter->tx_itr,
2828                                     adapter->total_tx_packets,
2829                                     adapter->total_tx_bytes);
2830         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2831         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2832                 adapter->tx_itr = low_latency;
2833
2834         adapter->rx_itr = e1000_update_itr(adapter,
2835                                     adapter->rx_itr,
2836                                     adapter->total_rx_packets,
2837                                     adapter->total_rx_bytes);
2838         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2839         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2840                 adapter->rx_itr = low_latency;
2841
2842         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2843
2844         switch (current_itr) {
2845         /* counts and packets in update_itr are dependent on these numbers */
2846         case lowest_latency:
2847                 new_itr = 70000;
2848                 break;
2849         case low_latency:
2850                 new_itr = 20000; /* aka hwitr = ~200 */
2851                 break;
2852         case bulk_latency:
2853                 new_itr = 4000;
2854                 break;
2855         default:
2856                 break;
2857         }
2858
2859 set_itr_now:
2860         if (new_itr != adapter->itr) {
2861                 /* this attempts to bias the interrupt rate towards Bulk
2862                  * by adding intermediate steps when interrupt rate is
2863                  * increasing */
2864                 new_itr = new_itr > adapter->itr ?
2865                              min(adapter->itr + (new_itr >> 2), new_itr) :
2866                              new_itr;
2867                 adapter->itr = new_itr;
2868                 E1000_WRITE_REG(hw, ITR, 1000000000 / (new_itr * 256));
2869         }
2870
2871         return;
2872 }
2873
2874 #define E1000_TX_FLAGS_CSUM             0x00000001
2875 #define E1000_TX_FLAGS_VLAN             0x00000002
2876 #define E1000_TX_FLAGS_TSO              0x00000004
2877 #define E1000_TX_FLAGS_IPV4             0x00000008
2878 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2879 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2880
2881 static int
2882 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2883           struct sk_buff *skb)
2884 {
2885         struct e1000_context_desc *context_desc;
2886         struct e1000_buffer *buffer_info;
2887         unsigned int i;
2888         uint32_t cmd_length = 0;
2889         uint16_t ipcse = 0, tucse, mss;
2890         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2891         int err;
2892
2893         if (skb_is_gso(skb)) {
2894                 if (skb_header_cloned(skb)) {
2895                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2896                         if (err)
2897                                 return err;
2898                 }
2899
2900                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2901                 mss = skb_shinfo(skb)->gso_size;
2902                 if (skb->protocol == htons(ETH_P_IP)) {
2903                         struct iphdr *iph = ip_hdr(skb);
2904                         iph->tot_len = 0;
2905                         iph->check = 0;
2906                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2907                                                                  iph->daddr, 0,
2908                                                                  IPPROTO_TCP,
2909                                                                  0);
2910                         cmd_length = E1000_TXD_CMD_IP;
2911                         ipcse = skb_transport_offset(skb) - 1;
2912                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2913                         ipv6_hdr(skb)->payload_len = 0;
2914                         tcp_hdr(skb)->check =
2915                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2916                                                  &ipv6_hdr(skb)->daddr,
2917                                                  0, IPPROTO_TCP, 0);
2918                         ipcse = 0;
2919                 }
2920                 ipcss = skb_network_offset(skb);
2921                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2922                 tucss = skb_transport_offset(skb);
2923                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2924                 tucse = 0;
2925
2926                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2927                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2928
2929                 i = tx_ring->next_to_use;
2930                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2931                 buffer_info = &tx_ring->buffer_info[i];
2932
2933                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2934                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2935                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2936                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2937                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2938                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2939                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2940                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2941                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2942
2943                 buffer_info->time_stamp = jiffies;
2944                 buffer_info->next_to_watch = i;
2945
2946                 if (++i == tx_ring->count) i = 0;
2947                 tx_ring->next_to_use = i;
2948
2949                 return TRUE;
2950         }
2951         return FALSE;
2952 }
2953
2954 static boolean_t
2955 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2956               struct sk_buff *skb)
2957 {
2958         struct e1000_context_desc *context_desc;
2959         struct e1000_buffer *buffer_info;
2960         unsigned int i;
2961         uint8_t css;
2962
2963         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2964                 css = skb_transport_offset(skb);
2965
2966                 i = tx_ring->next_to_use;
2967                 buffer_info = &tx_ring->buffer_info[i];
2968                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2969
2970                 context_desc->lower_setup.ip_config = 0;
2971                 context_desc->upper_setup.tcp_fields.tucss = css;
2972                 context_desc->upper_setup.tcp_fields.tucso =
2973                         css + skb->csum_offset;
2974                 context_desc->upper_setup.tcp_fields.tucse = 0;
2975                 context_desc->tcp_seg_setup.data = 0;
2976                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2977
2978                 buffer_info->time_stamp = jiffies;
2979                 buffer_info->next_to_watch = i;
2980
2981                 if (unlikely(++i == tx_ring->count)) i = 0;
2982                 tx_ring->next_to_use = i;
2983
2984                 return TRUE;
2985         }
2986
2987         return FALSE;
2988 }
2989
2990 #define E1000_MAX_TXD_PWR       12
2991 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2992
2993 static int
2994 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2995              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2996              unsigned int nr_frags, unsigned int mss)
2997 {
2998         struct e1000_buffer *buffer_info;
2999         unsigned int len = skb->len;
3000         unsigned int offset = 0, size, count = 0, i;
3001         unsigned int f;
3002         len -= skb->data_len;
3003
3004         i = tx_ring->next_to_use;
3005
3006         while (len) {
3007                 buffer_info = &tx_ring->buffer_info[i];
3008                 size = min(len, max_per_txd);
3009                 /* Workaround for Controller erratum --
3010                  * descriptor for non-tso packet in a linear SKB that follows a
3011                  * tso gets written back prematurely before the data is fully
3012                  * DMA'd to the controller */
3013                 if (!skb->data_len && tx_ring->last_tx_tso &&
3014                     !skb_is_gso(skb)) {
3015                         tx_ring->last_tx_tso = 0;
3016                         size -= 4;
3017                 }
3018
3019                 /* Workaround for premature desc write-backs
3020                  * in TSO mode.  Append 4-byte sentinel desc */
3021                 if (unlikely(mss && !nr_frags && size == len && size > 8))
3022                         size -= 4;
3023                 /* work-around for errata 10 and it applies
3024                  * to all controllers in PCI-X mode
3025                  * The fix is to make sure that the first descriptor of a
3026                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3027                  */
3028                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3029                                 (size > 2015) && count == 0))
3030                         size = 2015;
3031
3032                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
3033                  * terminating buffers within evenly-aligned dwords. */
3034                 if (unlikely(adapter->pcix_82544 &&
3035                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3036                    size > 4))
3037                         size -= 4;
3038
3039                 buffer_info->length = size;
3040                 buffer_info->dma =
3041                         pci_map_single(adapter->pdev,
3042                                 skb->data + offset,
3043                                 size,
3044                                 PCI_DMA_TODEVICE);
3045                 buffer_info->time_stamp = jiffies;
3046                 buffer_info->next_to_watch = i;
3047
3048                 len -= size;
3049                 offset += size;
3050                 count++;
3051                 if (unlikely(++i == tx_ring->count)) i = 0;
3052         }
3053
3054         for (f = 0; f < nr_frags; f++) {
3055                 struct skb_frag_struct *frag;
3056
3057                 frag = &skb_shinfo(skb)->frags[f];
3058                 len = frag->size;
3059                 offset = frag->page_offset;
3060
3061                 while (len) {
3062                         buffer_info = &tx_ring->buffer_info[i];
3063                         size = min(len, max_per_txd);
3064                         /* Workaround for premature desc write-backs
3065                          * in TSO mode.  Append 4-byte sentinel desc */
3066                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3067                                 size -= 4;
3068                         /* Workaround for potential 82544 hang in PCI-X.
3069                          * Avoid terminating buffers within evenly-aligned
3070                          * dwords. */
3071                         if (unlikely(adapter->pcix_82544 &&
3072                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
3073                            size > 4))
3074                                 size -= 4;
3075
3076                         buffer_info->length = size;
3077                         buffer_info->dma =
3078                                 pci_map_page(adapter->pdev,
3079                                         frag->page,
3080                                         offset,
3081                                         size,
3082                                         PCI_DMA_TODEVICE);
3083                         buffer_info->time_stamp = jiffies;
3084                         buffer_info->next_to_watch = i;
3085
3086                         len -= size;
3087                         offset += size;
3088                         count++;
3089                         if (unlikely(++i == tx_ring->count)) i = 0;
3090                 }
3091         }
3092
3093         i = (i == 0) ? tx_ring->count - 1 : i - 1;
3094         tx_ring->buffer_info[i].skb = skb;
3095         tx_ring->buffer_info[first].next_to_watch = i;
3096
3097         return count;
3098 }
3099
3100 static void
3101 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3102                int tx_flags, int count)
3103 {
3104         struct e1000_tx_desc *tx_desc = NULL;
3105         struct e1000_buffer *buffer_info;
3106         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3107         unsigned int i;
3108
3109         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3110                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3111                              E1000_TXD_CMD_TSE;
3112                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3113
3114                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3115                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3116         }
3117
3118         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3119                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3120                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3121         }
3122
3123         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3124                 txd_lower |= E1000_TXD_CMD_VLE;
3125                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3126         }
3127
3128         i = tx_ring->next_to_use;
3129
3130         while (count--) {
3131                 buffer_info = &tx_ring->buffer_info[i];
3132                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3133                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3134                 tx_desc->lower.data =
3135                         cpu_to_le32(txd_lower | buffer_info->length);
3136                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3137                 if (unlikely(++i == tx_ring->count)) i = 0;
3138         }
3139
3140         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3141
3142         /* Force memory writes to complete before letting h/w
3143          * know there are new descriptors to fetch.  (Only
3144          * applicable for weak-ordered memory model archs,
3145          * such as IA-64). */
3146         wmb();
3147
3148         tx_ring->next_to_use = i;
3149         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
3150         /* we need this if more than one processor can write to our tail
3151          * at a time, it syncronizes IO on IA64/Altix systems */
3152         mmiowb();
3153 }
3154
3155 /**
3156  * 82547 workaround to avoid controller hang in half-duplex environment.
3157  * The workaround is to avoid queuing a large packet that would span
3158  * the internal Tx FIFO ring boundary by notifying the stack to resend
3159  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3160  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3161  * to the beginning of the Tx FIFO.
3162  **/
3163
3164 #define E1000_FIFO_HDR                  0x10
3165 #define E1000_82547_PAD_LEN             0x3E0
3166
3167 static int
3168 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3169 {
3170         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3171         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3172
3173         skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3174
3175         if (adapter->link_duplex != HALF_DUPLEX)
3176                 goto no_fifo_stall_required;
3177
3178         if (atomic_read(&adapter->tx_fifo_stall))
3179                 return 1;
3180
3181         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3182                 atomic_set(&adapter->tx_fifo_stall, 1);
3183                 return 1;
3184         }
3185
3186 no_fifo_stall_required:
3187         adapter->tx_fifo_head += skb_fifo_len;
3188         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3189                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3190         return 0;
3191 }
3192
3193 #define MINIMUM_DHCP_PACKET_SIZE 282
3194 static int
3195 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3196 {
3197         struct e1000_hw *hw =  &adapter->hw;
3198         uint16_t length, offset;
3199         if (vlan_tx_tag_present(skb)) {
3200                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
3201                         ( adapter->hw.mng_cookie.status &
3202                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3203                         return 0;
3204         }
3205         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3206                 struct ethhdr *eth = (struct ethhdr *) skb->data;
3207                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3208                         const struct iphdr *ip =
3209                                 (struct iphdr *)((uint8_t *)skb->data+14);
3210                         if (IPPROTO_UDP == ip->protocol) {
3211                                 struct udphdr *udp =
3212                                         (struct udphdr *)((uint8_t *)ip +
3213                                                 (ip->ihl << 2));
3214                                 if (ntohs(udp->dest) == 67) {
3215                                         offset = (uint8_t *)udp + 8 - skb->data;
3216                                         length = skb->len - offset;
3217
3218                                         return e1000_mng_write_dhcp_info(hw,
3219                                                         (uint8_t *)udp + 8,
3220                                                         length);
3221                                 }
3222                         }
3223                 }
3224         }
3225         return 0;
3226 }
3227
3228 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3229 {
3230         struct e1000_adapter *adapter = netdev_priv(netdev);
3231         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3232
3233         netif_stop_queue(netdev);
3234         /* Herbert's original patch had:
3235          *  smp_mb__after_netif_stop_queue();
3236          * but since that doesn't exist yet, just open code it. */
3237         smp_mb();
3238
3239         /* We need to check again in a case another CPU has just
3240          * made room available. */
3241         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3242                 return -EBUSY;
3243
3244         /* A reprieve! */
3245         netif_start_queue(netdev);
3246         ++adapter->restart_queue;
3247         return 0;
3248 }
3249
3250 static int e1000_maybe_stop_tx(struct net_device *netdev,
3251                                struct e1000_tx_ring *tx_ring, int size)
3252 {
3253         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3254                 return 0;
3255         return __e1000_maybe_stop_tx(netdev, size);
3256 }
3257
3258 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3259 static int
3260 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3261 {
3262         struct e1000_adapter *adapter = netdev_priv(netdev);
3263         struct e1000_tx_ring *tx_ring;
3264         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3265         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3266         unsigned int tx_flags = 0;
3267         unsigned int len = skb->len;
3268         unsigned long flags;
3269         unsigned int nr_frags = 0;
3270         unsigned int mss = 0;
3271         int count = 0;
3272         int tso;
3273         unsigned int f;
3274         len -= skb->data_len;
3275
3276         /* This goes back to the question of how to logically map a tx queue
3277          * to a flow.  Right now, performance is impacted slightly negatively
3278          * if using multiple tx queues.  If the stack breaks away from a
3279          * single qdisc implementation, we can look at this again. */
3280         tx_ring = adapter->tx_ring;
3281
3282         if (unlikely(skb->len <= 0)) {
3283                 dev_kfree_skb_any(skb);
3284                 return NETDEV_TX_OK;
3285         }
3286
3287         /* 82571 and newer doesn't need the workaround that limited descriptor
3288          * length to 4kB */
3289         if (adapter->hw.mac_type >= e1000_82571)
3290                 max_per_txd = 8192;
3291
3292         mss = skb_shinfo(skb)->gso_size;
3293         /* The controller does a simple calculation to
3294          * make sure there is enough room in the FIFO before
3295          * initiating the DMA for each buffer.  The calc is:
3296          * 4 = ceil(buffer len/mss).  To make sure we don't
3297          * overrun the FIFO, adjust the max buffer len if mss
3298          * drops. */
3299         if (mss) {
3300                 uint8_t hdr_len;
3301                 max_per_txd = min(mss << 2, max_per_txd);
3302                 max_txd_pwr = fls(max_per_txd) - 1;
3303
3304                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3305                 * points to just header, pull a few bytes of payload from
3306                 * frags into skb->data */
3307                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3308                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
3309                         switch (adapter->hw.mac_type) {
3310                                 unsigned int pull_size;
3311                         case e1000_82544:
3312                                 /* Make sure we have room to chop off 4 bytes,
3313                                  * and that the end alignment will work out to
3314                                  * this hardware's requirements
3315                                  * NOTE: this is a TSO only workaround
3316                                  * if end byte alignment not correct move us
3317                                  * into the next dword */
3318                                 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3319                                         break;
3320                                 /* fall through */
3321                         case e1000_82571:
3322                         case e1000_82572:
3323                         case e1000_82573:
3324                         case e1000_ich8lan:
3325                                 pull_size = min((unsigned int)4, skb->data_len);
3326                                 if (!__pskb_pull_tail(skb, pull_size)) {
3327                                         DPRINTK(DRV, ERR,
3328                                                 "__pskb_pull_tail failed.\n");
3329                                         dev_kfree_skb_any(skb);
3330                                         return NETDEV_TX_OK;
3331                                 }
3332                                 len = skb->len - skb->data_len;
3333                                 break;
3334                         default:
3335                                 /* do nothing */
3336                                 break;
3337                         }
3338                 }
3339         }
3340
3341         /* reserve a descriptor for the offload context */
3342         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3343                 count++;
3344         count++;
3345
3346         /* Controller Erratum workaround */
3347         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3348                 count++;
3349
3350         count += TXD_USE_COUNT(len, max_txd_pwr);
3351
3352         if (adapter->pcix_82544)
3353                 count++;
3354
3355         /* work-around for errata 10 and it applies to all controllers
3356          * in PCI-X mode, so add one more descriptor to the count
3357          */
3358         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3359                         (len > 2015)))
3360                 count++;
3361
3362         nr_frags = skb_shinfo(skb)->nr_frags;
3363         for (f = 0; f < nr_frags; f++)
3364                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3365                                        max_txd_pwr);
3366         if (adapter->pcix_82544)
3367                 count += nr_frags;
3368
3369
3370         if (adapter->hw.tx_pkt_filtering &&
3371             (adapter->hw.mac_type == e1000_82573))
3372                 e1000_transfer_dhcp_info(adapter, skb);
3373
3374         if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3375                 /* Collision - tell upper layer to requeue */
3376                 return NETDEV_TX_LOCKED;
3377
3378         /* need: count + 2 desc gap to keep tail from touching
3379          * head, otherwise try next time */
3380         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3381                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3382                 return NETDEV_TX_BUSY;
3383         }
3384
3385         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3386                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3387                         netif_stop_queue(netdev);
3388                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3389                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3390                         return NETDEV_TX_BUSY;
3391                 }
3392         }
3393
3394         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3395                 tx_flags |= E1000_TX_FLAGS_VLAN;
3396                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3397         }
3398
3399         first = tx_ring->next_to_use;
3400
3401         tso = e1000_tso(adapter, tx_ring, skb);
3402         if (tso < 0) {
3403                 dev_kfree_skb_any(skb);
3404                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3405                 return NETDEV_TX_OK;
3406         }
3407
3408         if (likely(tso)) {
3409                 tx_ring->last_tx_tso = 1;
3410                 tx_flags |= E1000_TX_FLAGS_TSO;
3411         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3412                 tx_flags |= E1000_TX_FLAGS_CSUM;
3413
3414         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3415          * 82571 hardware supports TSO capabilities for IPv6 as well...
3416          * no longer assume, we must. */
3417         if (likely(skb->protocol == htons(ETH_P_IP)))
3418                 tx_flags |= E1000_TX_FLAGS_IPV4;
3419
3420         e1000_tx_queue(adapter, tx_ring, tx_flags,
3421                        e1000_tx_map(adapter, tx_ring, skb, first,
3422                                     max_per_txd, nr_frags, mss));
3423
3424         netdev->trans_start = jiffies;
3425
3426         /* Make sure there is space in the ring for the next send. */
3427         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3428
3429         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3430         return NETDEV_TX_OK;
3431 }
3432
3433 /**
3434  * e1000_tx_timeout - Respond to a Tx Hang
3435  * @netdev: network interface device structure
3436  **/
3437
3438 static void
3439 e1000_tx_timeout(struct net_device *netdev)
3440 {
3441         struct e1000_adapter *adapter = netdev_priv(netdev);
3442
3443         /* Do the reset outside of interrupt context */
3444         adapter->tx_timeout_count++;
3445         schedule_work(&adapter->reset_task);
3446 }
3447
3448 static void
3449 e1000_reset_task(struct work_struct *work)
3450 {
3451         struct e1000_adapter *adapter =
3452                 container_of(work, struct e1000_adapter, reset_task);
3453
3454         e1000_reinit_locked(adapter);
3455 }
3456
3457 /**
3458  * e1000_get_stats - Get System Network Statistics
3459  * @netdev: network interface device structure
3460  *
3461  * Returns the address of the device statistics structure.
3462  * The statistics are actually updated from the timer callback.
3463  **/
3464
3465 static struct net_device_stats *
3466 e1000_get_stats(struct net_device *netdev)
3467 {
3468         struct e1000_adapter *adapter = netdev_priv(netdev);
3469
3470         /* only return the current stats */
3471         return &adapter->net_stats;
3472 }
3473
3474 /**
3475  * e1000_change_mtu - Change the Maximum Transfer Unit
3476  * @netdev: network interface device structure
3477  * @new_mtu: new value for maximum frame size
3478  *
3479  * Returns 0 on success, negative on failure
3480  **/
3481
3482 static int
3483 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3484 {
3485         struct e1000_adapter *adapter = netdev_priv(netdev);
3486         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3487         uint16_t eeprom_data = 0;
3488
3489         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3490             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3491                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3492                 return -EINVAL;
3493         }
3494
3495         /* Adapter-specific max frame size limits. */
3496         switch (adapter->hw.mac_type) {
3497         case e1000_undefined ... e1000_82542_rev2_1:
3498         case e1000_ich8lan:
3499                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3500                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3501                         return -EINVAL;
3502                 }
3503                 break;
3504         case e1000_82573:
3505                 /* Jumbo Frames not supported if:
3506                  * - this is not an 82573L device
3507                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3508                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3509                                   &eeprom_data);
3510                 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3511                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3512                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3513                                 DPRINTK(PROBE, ERR,
3514                                         "Jumbo Frames not supported.\n");
3515                                 return -EINVAL;
3516                         }
3517                         break;
3518                 }
3519                 /* ERT will be enabled later to enable wire speed receives */
3520
3521                 /* fall through to get support */
3522         case e1000_82571:
3523         case e1000_82572:
3524         case e1000_80003es2lan:
3525 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3526                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3527                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3528                         return -EINVAL;
3529                 }
3530                 break;
3531         default:
3532                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3533                 break;
3534         }
3535
3536         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3537          * means we reserve 2 more, this pushes us to allocate from the next
3538          * larger slab size
3539          * i.e. RXBUFFER_2048 --> size-4096 slab */
3540
3541         if (max_frame <= E1000_RXBUFFER_256)
3542                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3543         else if (max_frame <= E1000_RXBUFFER_512)
3544                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3545         else if (max_frame <= E1000_RXBUFFER_1024)
3546                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3547         else if (max_frame <= E1000_RXBUFFER_2048)
3548                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3549         else if (max_frame <= E1000_RXBUFFER_4096)
3550                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3551         else if (max_frame <= E1000_RXBUFFER_8192)
3552                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3553         else if (max_frame <= E1000_RXBUFFER_16384)
3554                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3555
3556         /* adjust allocation if LPE protects us, and we aren't using SBP */
3557         if (!adapter->hw.tbi_compatibility_on &&
3558             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3559              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3560                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3561
3562         netdev->mtu = new_mtu;
3563         adapter->hw.max_frame_size = max_frame;
3564
3565         if (netif_running(netdev))
3566                 e1000_reinit_locked(adapter);
3567
3568         return 0;
3569 }
3570
3571 /**
3572  * e1000_update_stats - Update the board statistics counters
3573  * @adapter: board private structure
3574  **/
3575
3576 void
3577 e1000_update_stats(struct e1000_adapter *adapter)
3578 {
3579         struct e1000_hw *hw = &adapter->hw;
3580         struct pci_dev *pdev = adapter->pdev;
3581         unsigned long flags;
3582         uint16_t phy_tmp;
3583
3584 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3585
3586         /*
3587          * Prevent stats update while adapter is being reset, or if the pci
3588          * connection is down.
3589          */
3590         if (adapter->link_speed == 0)
3591                 return;
3592         if (pci_channel_offline(pdev))
3593                 return;
3594
3595         spin_lock_irqsave(&adapter->stats_lock, flags);
3596
3597         /* these counters are modified from e1000_adjust_tbi_stats,
3598          * called from the interrupt context, so they must only
3599          * be written while holding adapter->stats_lock
3600          */
3601
3602         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3603         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3604         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3605         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3606         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3607         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3608         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3609
3610         if (adapter->hw.mac_type != e1000_ich8lan) {
3611                 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3612                 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3613                 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3614                 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3615                 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3616                 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3617         }
3618
3619         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3620         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3621         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3622         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3623         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3624         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3625         adapter->stats.dc += E1000_READ_REG(hw, DC);
3626         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3627         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3628         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3629         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3630         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3631         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3632         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3633         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3634         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3635         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3636         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3637         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3638         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3639         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3640         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3641         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3642         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3643         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3644         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3645
3646         if (adapter->hw.mac_type != e1000_ich8lan) {
3647                 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3648                 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3649                 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3650                 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3651                 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3652                 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3653         }
3654
3655         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3656         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3657
3658         /* used for adaptive IFS */
3659
3660         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3661         adapter->stats.tpt += hw->tx_packet_delta;
3662         hw->collision_delta = E1000_READ_REG(hw, COLC);
3663         adapter->stats.colc += hw->collision_delta;
3664
3665         if (hw->mac_type >= e1000_82543) {
3666                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3667                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3668                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3669                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3670                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3671                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3672         }
3673         if (hw->mac_type > e1000_82547_rev_2) {
3674                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3675                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3676
3677                 if (adapter->hw.mac_type != e1000_ich8lan) {
3678                         adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3679                         adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3680                         adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3681                         adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3682                         adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3683                         adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3684                         adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3685                 }
3686         }
3687
3688         /* Fill out the OS statistics structure */
3689         adapter->net_stats.rx_packets = adapter->stats.gprc;
3690         adapter->net_stats.tx_packets = adapter->stats.gptc;
3691         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3692         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3693         adapter->net_stats.multicast = adapter->stats.mprc;
3694         adapter->net_stats.collisions = adapter->stats.colc;
3695
3696         /* Rx Errors */
3697
3698         /* RLEC on some newer hardware can be incorrect so build
3699         * our own version based on RUC and ROC */
3700         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3701                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3702                 adapter->stats.ruc + adapter->stats.roc +
3703                 adapter->stats.cexterr;
3704         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3705         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3706         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3707         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3708         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3709
3710         /* Tx Errors */
3711         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3712         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3713         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3714         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3715         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3716         if (adapter->hw.bad_tx_carr_stats_fd &&
3717             adapter->link_duplex == FULL_DUPLEX) {
3718                 adapter->net_stats.tx_carrier_errors = 0;
3719                 adapter->stats.tncrs = 0;
3720         }
3721
3722         /* Tx Dropped needs to be maintained elsewhere */
3723
3724         /* Phy Stats */
3725         if (hw->media_type == e1000_media_type_copper) {
3726                 if ((adapter->link_speed == SPEED_1000) &&
3727                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3728                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3729                         adapter->phy_stats.idle_errors += phy_tmp;
3730                 }
3731
3732                 if ((hw->mac_type <= e1000_82546) &&
3733                    (hw->phy_type == e1000_phy_m88) &&
3734                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3735                         adapter->phy_stats.receive_errors += phy_tmp;
3736         }
3737
3738         /* Management Stats */
3739         if (adapter->hw.has_smbus) {
3740                 adapter->stats.mgptc += E1000_READ_REG(hw, MGTPTC);
3741                 adapter->stats.mgprc += E1000_READ_REG(hw, MGTPRC);
3742                 adapter->stats.mgpdc += E1000_READ_REG(hw, MGTPDC);
3743         }
3744
3745         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3746 }
3747 #ifdef CONFIG_PCI_MSI
3748
3749 /**
3750  * e1000_intr_msi - Interrupt Handler
3751  * @irq: interrupt number
3752  * @data: pointer to a network interface device structure
3753  **/
3754
3755 static irqreturn_t
3756 e1000_intr_msi(int irq, void *data)
3757 {
3758         struct net_device *netdev = data;
3759         struct e1000_adapter *adapter = netdev_priv(netdev);
3760         struct e1000_hw *hw = &adapter->hw;
3761 #ifndef CONFIG_E1000_NAPI
3762         int i;
3763 #endif
3764         uint32_t icr = E1000_READ_REG(hw, ICR);
3765
3766 #ifdef CONFIG_E1000_NAPI
3767         /* read ICR disables interrupts using IAM, so keep up with our
3768          * enable/disable accounting */
3769         atomic_inc(&adapter->irq_sem);
3770 #endif
3771         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3772                 hw->get_link_status = 1;
3773                 /* 80003ES2LAN workaround-- For packet buffer work-around on
3774                  * link down event; disable receives here in the ISR and reset
3775                  * adapter in watchdog */
3776                 if (netif_carrier_ok(netdev) &&
3777                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3778                         /* disable receives */
3779                         uint32_t rctl = E1000_READ_REG(hw, RCTL);
3780                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3781                 }
3782                 /* guard against interrupt when we're going down */
3783                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3784                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3785         }
3786
3787 #ifdef CONFIG_E1000_NAPI
3788         if (likely(netif_rx_schedule_prep(netdev))) {
3789                 adapter->total_tx_bytes = 0;
3790                 adapter->total_tx_packets = 0;
3791                 adapter->total_rx_bytes = 0;
3792                 adapter->total_rx_packets = 0;
3793                 __netif_rx_schedule(netdev);
3794         } else
3795                 e1000_irq_enable(adapter);
3796 #else
3797         adapter->total_tx_bytes = 0;
3798         adapter->total_rx_bytes = 0;
3799         adapter->total_tx_packets = 0;
3800         adapter->total_rx_packets = 0;
3801
3802         for (i = 0; i < E1000_MAX_INTR; i++)
3803                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3804                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3805                         break;
3806
3807         if (likely(adapter->itr_setting & 3))
3808                 e1000_set_itr(adapter);
3809 #endif
3810
3811         return IRQ_HANDLED;
3812 }
3813 #endif
3814
3815 /**
3816  * e1000_intr - Interrupt Handler
3817  * @irq: interrupt number
3818  * @data: pointer to a network interface device structure
3819  **/
3820
3821 static irqreturn_t
3822 e1000_intr(int irq, void *data)
3823 {
3824         struct net_device *netdev = data;
3825         struct e1000_adapter *adapter = netdev_priv(netdev);
3826         struct e1000_hw *hw = &adapter->hw;
3827         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3828 #ifndef CONFIG_E1000_NAPI
3829         int i;
3830 #endif
3831         if (unlikely(!icr))
3832                 return IRQ_NONE;  /* Not our interrupt */
3833
3834 #ifdef CONFIG_E1000_NAPI
3835         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3836          * not set, then the adapter didn't send an interrupt */
3837         if (unlikely(hw->mac_type >= e1000_82571 &&
3838                      !(icr & E1000_ICR_INT_ASSERTED)))
3839                 return IRQ_NONE;
3840
3841         /* Interrupt Auto-Mask...upon reading ICR,
3842          * interrupts are masked.  No need for the
3843          * IMC write, but it does mean we should
3844          * account for it ASAP. */
3845         if (likely(hw->mac_type >= e1000_82571))
3846                 atomic_inc(&adapter->irq_sem);
3847 #endif
3848
3849         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3850                 hw->get_link_status = 1;
3851                 /* 80003ES2LAN workaround--
3852                  * For packet buffer work-around on link down event;
3853                  * disable receives here in the ISR and
3854                  * reset adapter in watchdog
3855                  */
3856                 if (netif_carrier_ok(netdev) &&
3857                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3858                         /* disable receives */
3859                         rctl = E1000_READ_REG(hw, RCTL);
3860                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3861                 }
3862                 /* guard against interrupt when we're going down */
3863                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3864                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3865         }
3866
3867 #ifdef CONFIG_E1000_NAPI
3868         if (unlikely(hw->mac_type < e1000_82571)) {
3869                 /* disable interrupts, without the synchronize_irq bit */
3870                 atomic_inc(&adapter->irq_sem);
3871                 E1000_WRITE_REG(hw, IMC, ~0);
3872                 E1000_WRITE_FLUSH(hw);
3873         }
3874         if (likely(netif_rx_schedule_prep(netdev))) {
3875                 adapter->total_tx_bytes = 0;
3876                 adapter->total_tx_packets = 0;
3877                 adapter->total_rx_bytes = 0;
3878                 adapter->total_rx_packets = 0;
3879                 __netif_rx_schedule(netdev);
3880         } else
3881                 /* this really should not happen! if it does it is basically a
3882                  * bug, but not a hard error, so enable ints and continue */
3883                 e1000_irq_enable(adapter);
3884 #else
3885         /* Writing IMC and IMS is needed for 82547.
3886          * Due to Hub Link bus being occupied, an interrupt
3887          * de-assertion message is not able to be sent.
3888          * When an interrupt assertion message is generated later,
3889          * two messages are re-ordered and sent out.
3890          * That causes APIC to think 82547 is in de-assertion
3891          * state, while 82547 is in assertion state, resulting
3892          * in dead lock. Writing IMC forces 82547 into
3893          * de-assertion state.
3894          */
3895         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3896                 atomic_inc(&adapter->irq_sem);
3897                 E1000_WRITE_REG(hw, IMC, ~0);
3898         }
3899
3900         adapter->total_tx_bytes = 0;
3901         adapter->total_rx_bytes = 0;
3902         adapter->total_tx_packets = 0;
3903         adapter->total_rx_packets = 0;
3904
3905         for (i = 0; i < E1000_MAX_INTR; i++)
3906                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3907                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3908                         break;
3909
3910         if (likely(adapter->itr_setting & 3))
3911                 e1000_set_itr(adapter);
3912
3913         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3914                 e1000_irq_enable(adapter);
3915
3916 #endif
3917         return IRQ_HANDLED;
3918 }
3919
3920 #ifdef CONFIG_E1000_NAPI
3921 /**
3922  * e1000_clean - NAPI Rx polling callback
3923  * @adapter: board private structure
3924  **/
3925
3926 static int
3927 e1000_clean(struct net_device *poll_dev, int *budget)
3928 {
3929         struct e1000_adapter *adapter;
3930         int work_to_do = min(*budget, poll_dev->quota);
3931         int tx_cleaned = 0, work_done = 0;
3932
3933         /* Must NOT use netdev_priv macro here. */
3934         adapter = poll_dev->priv;
3935
3936         /* Keep link state information with original netdev */
3937         if (!netif_carrier_ok(poll_dev))
3938                 goto quit_polling;
3939
3940         /* e1000_clean is called per-cpu.  This lock protects
3941          * tx_ring[0] from being cleaned by multiple cpus
3942          * simultaneously.  A failure obtaining the lock means
3943          * tx_ring[0] is currently being cleaned anyway. */
3944         if (spin_trylock(&adapter->tx_queue_lock)) {
3945                 tx_cleaned = e1000_clean_tx_irq(adapter,
3946                                                 &adapter->tx_ring[0]);
3947                 spin_unlock(&adapter->tx_queue_lock);
3948         }
3949
3950         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3951                           &work_done, work_to_do);
3952
3953         *budget -= work_done;
3954         poll_dev->quota -= work_done;
3955
3956         /* If no Tx and not enough Rx work done, exit the polling mode */
3957         if ((!tx_cleaned && (work_done == 0)) ||
3958            !netif_running(poll_dev)) {
3959 quit_polling:
3960                 if (likely(adapter->itr_setting & 3))
3961                         e1000_set_itr(adapter);
3962                 netif_rx_complete(poll_dev);
3963                 e1000_irq_enable(adapter);
3964                 return 0;
3965         }
3966
3967         return 1;
3968 }
3969
3970 #endif
3971 /**
3972  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3973  * @adapter: board private structure
3974  **/
3975
3976 static boolean_t
3977 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3978                    struct e1000_tx_ring *tx_ring)
3979 {
3980         struct net_device *netdev = adapter->netdev;
3981         struct e1000_tx_desc *tx_desc, *eop_desc;
3982         struct e1000_buffer *buffer_info;
3983         unsigned int i, eop;
3984 #ifdef CONFIG_E1000_NAPI
3985         unsigned int count = 0;
3986 #endif
3987         boolean_t cleaned = FALSE;
3988         unsigned int total_tx_bytes=0, total_tx_packets=0;
3989
3990         i = tx_ring->next_to_clean;
3991         eop = tx_ring->buffer_info[i].next_to_watch;
3992         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3993
3994         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3995                 for (cleaned = FALSE; !cleaned; ) {
3996                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3997                         buffer_info = &tx_ring->buffer_info[i];
3998                         cleaned = (i == eop);
3999
4000                         if (cleaned) {
4001                                 struct sk_buff *skb = buffer_info->skb;
4002                                 unsigned int segs, bytecount;
4003                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
4004                                 /* multiply data chunks by size of headers */
4005                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
4006                                             skb->len;
4007                                 total_tx_packets += segs;
4008                                 total_tx_bytes += bytecount;
4009                         }
4010                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
4011                         tx_desc->upper.data = 0;
4012
4013                         if (unlikely(++i == tx_ring->count)) i = 0;
4014                 }
4015
4016                 eop = tx_ring->buffer_info[i].next_to_watch;
4017                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
4018 #ifdef CONFIG_E1000_NAPI
4019 #define E1000_TX_WEIGHT 64
4020                 /* weight of a sort for tx, to avoid endless transmit cleanup */
4021                 if (count++ == E1000_TX_WEIGHT) break;
4022 #endif
4023         }
4024
4025         tx_ring->next_to_clean = i;
4026
4027 #define TX_WAKE_THRESHOLD 32
4028         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
4029                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
4030                 /* Make sure that anybody stopping the queue after this
4031                  * sees the new next_to_clean.
4032                  */
4033                 smp_mb();
4034                 if (netif_queue_stopped(netdev)) {
4035                         netif_wake_queue(netdev);
4036                         ++adapter->restart_queue;
4037                 }
4038         }
4039
4040         if (adapter->detect_tx_hung) {
4041                 /* Detect a transmit hang in hardware, this serializes the
4042                  * check with the clearing of time_stamp and movement of i */
4043                 adapter->detect_tx_hung = FALSE;
4044                 if (tx_ring->buffer_info[eop].dma &&
4045                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
4046                                (adapter->tx_timeout_factor * HZ))
4047                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
4048                          E1000_STATUS_TXOFF)) {
4049
4050                         /* detected Tx unit hang */
4051                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
4052                                         "  Tx Queue             <%lu>\n"
4053                                         "  TDH                  <%x>\n"
4054                                         "  TDT                  <%x>\n"
4055                                         "  next_to_use          <%x>\n"
4056                                         "  next_to_clean        <%x>\n"
4057                                         "buffer_info[next_to_clean]\n"
4058                                         "  time_stamp           <%lx>\n"
4059                                         "  next_to_watch        <%x>\n"
4060                                         "  jiffies              <%lx>\n"
4061                                         "  next_to_watch.status <%x>\n",
4062                                 (unsigned long)((tx_ring - adapter->tx_ring) /
4063                                         sizeof(struct e1000_tx_ring)),
4064                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
4065                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
4066                                 tx_ring->next_to_use,
4067                                 tx_ring->next_to_clean,
4068                                 tx_ring->buffer_info[eop].time_stamp,
4069                                 eop,
4070                                 jiffies,
4071                                 eop_desc->upper.fields.status);
4072                         netif_stop_queue(netdev);
4073                 }
4074         }
4075         adapter->total_tx_bytes += total_tx_bytes;
4076         adapter->total_tx_packets += total_tx_packets;
4077         return cleaned;
4078 }
4079
4080 /**
4081  * e1000_rx_checksum - Receive Checksum Offload for 82543
4082  * @adapter:     board private structure
4083  * @status_err:  receive descriptor status and error fields
4084  * @csum:        receive descriptor csum field
4085  * @sk_buff:     socket buffer with received data
4086  **/
4087
4088 static void
4089 e1000_rx_checksum(struct e1000_adapter *adapter,
4090                   uint32_t status_err, uint32_t csum,
4091                   struct sk_buff *skb)
4092 {
4093         uint16_t status = (uint16_t)status_err;
4094         uint8_t errors = (uint8_t)(status_err >> 24);
4095         skb->ip_summed = CHECKSUM_NONE;
4096
4097         /* 82543 or newer only */
4098         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
4099         /* Ignore Checksum bit is set */
4100         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4101         /* TCP/UDP checksum error bit is set */
4102         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4103                 /* let the stack verify checksum errors */
4104                 adapter->hw_csum_err++;
4105                 return;
4106         }
4107         /* TCP/UDP Checksum has not been calculated */
4108         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
4109                 if (!(status & E1000_RXD_STAT_TCPCS))
4110                         return;
4111         } else {
4112                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4113                         return;
4114         }
4115         /* It must be a TCP or UDP packet with a valid checksum */
4116         if (likely(status & E1000_RXD_STAT_TCPCS)) {
4117                 /* TCP checksum is good */
4118                 skb->ip_summed = CHECKSUM_UNNECESSARY;
4119         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
4120                 /* IP fragment with UDP payload */
4121                 /* Hardware complements the payload checksum, so we undo it
4122                  * and then put the value in host order for further stack use.
4123                  */
4124                 csum = ntohl(csum ^ 0xFFFF);
4125                 skb->csum = csum;
4126                 skb->ip_summed = CHECKSUM_COMPLETE;
4127         }
4128         adapter->hw_csum_good++;
4129 }
4130
4131 /**
4132  * e1000_clean_rx_irq - Send received data up the network stack; legacy
4133  * @adapter: board private structure
4134  **/
4135
4136 static boolean_t
4137 #ifdef CONFIG_E1000_NAPI
4138 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4139                    struct e1000_rx_ring *rx_ring,
4140                    int *work_done, int work_to_do)
4141 #else
4142 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4143                    struct e1000_rx_ring *rx_ring)
4144 #endif
4145 {
4146         struct net_device *netdev = adapter->netdev;
4147         struct pci_dev *pdev = adapter->pdev;
4148         struct e1000_rx_desc *rx_desc, *next_rxd;
4149         struct e1000_buffer *buffer_info, *next_buffer;
4150         unsigned long flags;
4151         uint32_t length;
4152         uint8_t last_byte;
4153         unsigned int i;
4154         int cleaned_count = 0;
4155         boolean_t cleaned = FALSE;
4156         unsigned int total_rx_bytes=0, total_rx_packets=0;
4157
4158         i = rx_ring->next_to_clean;
4159         rx_desc = E1000_RX_DESC(*rx_ring, i);
4160         buffer_info = &rx_ring->buffer_info[i];
4161
4162         while (rx_desc->status & E1000_RXD_STAT_DD) {
4163                 struct sk_buff *skb;
4164                 u8 status;
4165
4166 #ifdef CONFIG_E1000_NAPI
4167                 if (*work_done >= work_to_do)
4168                         break;
4169                 (*work_done)++;
4170 #endif
4171                 status = rx_desc->status;
4172                 skb = buffer_info->skb;
4173                 buffer_info->skb = NULL;
4174
4175                 prefetch(skb->data - NET_IP_ALIGN);
4176
4177                 if (++i == rx_ring->count) i = 0;
4178                 next_rxd = E1000_RX_DESC(*rx_ring, i);
4179                 prefetch(next_rxd);
4180
4181                 next_buffer = &rx_ring->buffer_info[i];
4182
4183                 cleaned = TRUE;
4184                 cleaned_count++;
4185                 pci_unmap_single(pdev,
4186                                  buffer_info->dma,
4187                                  buffer_info->length,
4188                                  PCI_DMA_FROMDEVICE);
4189
4190                 length = le16_to_cpu(rx_desc->length);
4191
4192                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4193                         /* All receives must fit into a single buffer */
4194                         E1000_DBG("%s: Receive packet consumed multiple"
4195                                   " buffers\n", netdev->name);
4196                         /* recycle */
4197                         buffer_info->skb = skb;
4198                         goto next_desc;
4199                 }
4200
4201                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4202                         last_byte = *(skb->data + length - 1);
4203                         if (TBI_ACCEPT(&adapter->hw, status,
4204                                       rx_desc->errors, length, last_byte)) {
4205                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4206                                 e1000_tbi_adjust_stats(&adapter->hw,
4207                                                        &adapter->stats,
4208                                                        length, skb->data);
4209                                 spin_unlock_irqrestore(&adapter->stats_lock,
4210                                                        flags);
4211                                 length--;
4212                         } else {
4213                                 /* recycle */
4214                                 buffer_info->skb = skb;
4215                                 goto next_desc;
4216                         }
4217                 }
4218
4219                 /* adjust length to remove Ethernet CRC, this must be
4220                  * done after the TBI_ACCEPT workaround above */
4221                 length -= 4;
4222
4223                 /* probably a little skewed due to removing CRC */
4224                 total_rx_bytes += length;
4225                 total_rx_packets++;
4226
4227                 /* code added for copybreak, this should improve
4228                  * performance for small packets with large amounts
4229                  * of reassembly being done in the stack */
4230                 if (length < copybreak) {
4231                         struct sk_buff *new_skb =
4232                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4233                         if (new_skb) {
4234                                 skb_reserve(new_skb, NET_IP_ALIGN);
4235                                 skb_copy_to_linear_data_offset(new_skb,
4236                                                                -NET_IP_ALIGN,
4237                                                                (skb->data -
4238                                                                 NET_IP_ALIGN),
4239                                                                (length +
4240                                                                 NET_IP_ALIGN));
4241                                 /* save the skb in buffer_info as good */
4242                                 buffer_info->skb = skb;
4243                                 skb = new_skb;
4244                         }
4245                         /* else just continue with the old one */
4246                 }
4247                 /* end copybreak code */
4248                 skb_put(skb, length);
4249
4250                 /* Receive Checksum Offload */
4251                 e1000_rx_checksum(adapter,
4252                                   (uint32_t)(status) |
4253                                   ((uint32_t)(rx_desc->errors) << 24),
4254                                   le16_to_cpu(rx_desc->csum), skb);
4255
4256                 skb->protocol = eth_type_trans(skb, netdev);
4257 #ifdef CONFIG_E1000_NAPI
4258                 if (unlikely(adapter->vlgrp &&
4259                             (status & E1000_RXD_STAT_VP))) {
4260                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4261                                                  le16_to_cpu(rx_desc->special) &
4262                                                  E1000_RXD_SPC_VLAN_MASK);
4263                 } else {
4264                         netif_receive_skb(skb);
4265                 }
4266 #else /* CONFIG_E1000_NAPI */
4267                 if (unlikely(adapter->vlgrp &&
4268                             (status & E1000_RXD_STAT_VP))) {
4269                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4270                                         le16_to_cpu(rx_desc->special) &
4271                                         E1000_RXD_SPC_VLAN_MASK);
4272                 } else {
4273                         netif_rx(skb);
4274                 }
4275 #endif /* CONFIG_E1000_NAPI */
4276                 netdev->last_rx = jiffies;
4277
4278 next_desc:
4279                 rx_desc->status = 0;
4280
4281                 /* return some buffers to hardware, one at a time is too slow */
4282                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4283                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4284                         cleaned_count = 0;
4285                 }
4286
4287                 /* use prefetched values */
4288                 rx_desc = next_rxd;
4289                 buffer_info = next_buffer;
4290         }
4291         rx_ring->next_to_clean = i;
4292
4293         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4294         if (cleaned_count)
4295                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4296
4297         adapter->total_rx_packets += total_rx_packets;
4298         adapter->total_rx_bytes += total_rx_bytes;
4299         return cleaned;
4300 }
4301
4302 /**
4303  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4304  * @adapter: board private structure
4305  **/
4306
4307 static boolean_t
4308 #ifdef CONFIG_E1000_NAPI
4309 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4310                       struct e1000_rx_ring *rx_ring,
4311                       int *work_done, int work_to_do)
4312 #else
4313 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4314                       struct e1000_rx_ring *rx_ring)
4315 #endif
4316 {
4317         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4318         struct net_device *netdev = adapter->netdev;
4319         struct pci_dev *pdev = adapter->pdev;
4320         struct e1000_buffer *buffer_info, *next_buffer;
4321         struct e1000_ps_page *ps_page;
4322         struct e1000_ps_page_dma *ps_page_dma;
4323         struct sk_buff *skb;
4324         unsigned int i, j;
4325         uint32_t length, staterr;
4326         int cleaned_count = 0;
4327         boolean_t cleaned = FALSE;
4328         unsigned int total_rx_bytes=0, total_rx_packets=0;
4329
4330         i = rx_ring->next_to_clean;
4331         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4332         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4333         buffer_info = &rx_ring->buffer_info[i];
4334
4335         while (staterr & E1000_RXD_STAT_DD) {
4336                 ps_page = &rx_ring->ps_page[i];
4337                 ps_page_dma = &rx_ring->ps_page_dma[i];
4338 #ifdef CONFIG_E1000_NAPI
4339                 if (unlikely(*work_done >= work_to_do))
4340                         break;
4341                 (*work_done)++;
4342 #endif
4343                 skb = buffer_info->skb;
4344
4345                 /* in the packet split case this is header only */
4346                 prefetch(skb->data - NET_IP_ALIGN);
4347
4348                 if (++i == rx_ring->count) i = 0;
4349                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4350                 prefetch(next_rxd);
4351
4352                 next_buffer = &rx_ring->buffer_info[i];
4353
4354                 cleaned = TRUE;
4355                 cleaned_count++;
4356                 pci_unmap_single(pdev, buffer_info->dma,
4357                                  buffer_info->length,
4358                                  PCI_DMA_FROMDEVICE);
4359
4360                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4361                         E1000_DBG("%s: Packet Split buffers didn't pick up"
4362                                   " the full packet\n", netdev->name);
4363                         dev_kfree_skb_irq(skb);
4364                         goto next_desc;
4365                 }
4366
4367                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4368                         dev_kfree_skb_irq(skb);
4369                         goto next_desc;
4370                 }
4371
4372                 length = le16_to_cpu(rx_desc->wb.middle.length0);
4373
4374                 if (unlikely(!length)) {
4375                         E1000_DBG("%s: Last part of the packet spanning"
4376                                   " multiple descriptors\n", netdev->name);
4377                         dev_kfree_skb_irq(skb);
4378                         goto next_desc;
4379                 }
4380
4381                 /* Good Receive */
4382                 skb_put(skb, length);
4383
4384                 {
4385                 /* this looks ugly, but it seems compiler issues make it
4386                    more efficient than reusing j */
4387                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4388
4389                 /* page alloc/put takes too long and effects small packet
4390                  * throughput, so unsplit small packets and save the alloc/put*/
4391                 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
4392                         u8 *vaddr;
4393                         /* there is no documentation about how to call
4394                          * kmap_atomic, so we can't hold the mapping
4395                          * very long */
4396                         pci_dma_sync_single_for_cpu(pdev,
4397                                 ps_page_dma->ps_page_dma[0],
4398                                 PAGE_SIZE,
4399                                 PCI_DMA_FROMDEVICE);
4400                         vaddr = kmap_atomic(ps_page->ps_page[0],
4401                                             KM_SKB_DATA_SOFTIRQ);
4402                         memcpy(skb_tail_pointer(skb), vaddr, l1);
4403                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4404                         pci_dma_sync_single_for_device(pdev,
4405                                 ps_page_dma->ps_page_dma[0],
4406                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4407                         /* remove the CRC */
4408                         l1 -= 4;
4409                         skb_put(skb, l1);
4410                         goto copydone;
4411                 } /* if */
4412                 }
4413
4414                 for (j = 0; j < adapter->rx_ps_pages; j++) {
4415                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
4416                                 break;
4417                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4418                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
4419                         ps_page_dma->ps_page_dma[j] = 0;
4420                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4421                                            length);
4422                         ps_page->ps_page[j] = NULL;
4423                         skb->len += length;
4424                         skb->data_len += length;
4425                         skb->truesize += length;
4426                 }
4427
4428                 /* strip the ethernet crc, problem is we're using pages now so
4429                  * this whole operation can get a little cpu intensive */
4430                 pskb_trim(skb, skb->len - 4);
4431
4432 copydone:
4433                 total_rx_bytes += skb->len;
4434                 total_rx_packets++;
4435
4436                 e1000_rx_checksum(adapter, staterr,
4437                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4438                 skb->protocol = eth_type_trans(skb, netdev);
4439
4440                 if (likely(rx_desc->wb.upper.header_status &
4441                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4442                         adapter->rx_hdr_split++;
4443 #ifdef CONFIG_E1000_NAPI
4444                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4445                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4446                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4447                                 E1000_RXD_SPC_VLAN_MASK);
4448                 } else {
4449                         netif_receive_skb(skb);
4450                 }
4451 #else /* CONFIG_E1000_NAPI */
4452                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4453                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4454                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4455                                 E1000_RXD_SPC_VLAN_MASK);
4456                 } else {
4457                         netif_rx(skb);
4458                 }
4459 #endif /* CONFIG_E1000_NAPI */
4460                 netdev->last_rx = jiffies;
4461
4462 next_desc:
4463                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4464                 buffer_info->skb = NULL;
4465
4466                 /* return some buffers to hardware, one at a time is too slow */
4467                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4468                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4469                         cleaned_count = 0;
4470                 }
4471
4472                 /* use prefetched values */
4473                 rx_desc = next_rxd;
4474                 buffer_info = next_buffer;
4475
4476                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4477         }
4478         rx_ring->next_to_clean = i;
4479
4480         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4481         if (cleaned_count)
4482                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4483
4484         adapter->total_rx_packets += total_rx_packets;
4485         adapter->total_rx_bytes += total_rx_bytes;
4486         return cleaned;
4487 }
4488
4489 /**
4490  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4491  * @adapter: address of board private structure
4492  **/
4493
4494 static void
4495 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4496                        struct e1000_rx_ring *rx_ring,
4497                        int cleaned_count)
4498 {
4499         struct net_device *netdev = adapter->netdev;
4500         struct pci_dev *pdev = adapter->pdev;
4501         struct e1000_rx_desc *rx_desc;
4502         struct e1000_buffer *buffer_info;
4503         struct sk_buff *skb;
4504         unsigned int i;
4505         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4506
4507         i = rx_ring->next_to_use;
4508         buffer_info = &rx_ring->buffer_info[i];
4509
4510         while (cleaned_count--) {
4511                 skb = buffer_info->skb;
4512                 if (skb) {
4513                         skb_trim(skb, 0);
4514                         goto map_skb;
4515                 }
4516
4517                 skb = netdev_alloc_skb(netdev, bufsz);
4518                 if (unlikely(!skb)) {
4519                         /* Better luck next round */
4520                         adapter->alloc_rx_buff_failed++;
4521                         break;
4522                 }
4523
4524                 /* Fix for errata 23, can't cross 64kB boundary */
4525                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4526                         struct sk_buff *oldskb = skb;
4527                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4528                                              "at %p\n", bufsz, skb->data);
4529                         /* Try again, without freeing the previous */
4530                         skb = netdev_alloc_skb(netdev, bufsz);
4531                         /* Failed allocation, critical failure */
4532                         if (!skb) {
4533                                 dev_kfree_skb(oldskb);
4534                                 break;
4535                         }
4536
4537                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4538                                 /* give up */
4539                                 dev_kfree_skb(skb);
4540                                 dev_kfree_skb(oldskb);
4541                                 break; /* while !buffer_info->skb */
4542                         }
4543
4544                         /* Use new allocation */
4545                         dev_kfree_skb(oldskb);
4546                 }
4547                 /* Make buffer alignment 2 beyond a 16 byte boundary
4548                  * this will result in a 16 byte aligned IP header after
4549                  * the 14 byte MAC header is removed
4550                  */
4551                 skb_reserve(skb, NET_IP_ALIGN);
4552
4553                 buffer_info->skb = skb;
4554                 buffer_info->length = adapter->rx_buffer_len;
4555 map_skb:
4556                 buffer_info->dma = pci_map_single(pdev,
4557                                                   skb->data,
4558                                                   adapter->rx_buffer_len,
4559                                                   PCI_DMA_FROMDEVICE);
4560
4561                 /* Fix for errata 23, can't cross 64kB boundary */
4562                 if (!e1000_check_64k_bound(adapter,
4563                                         (void *)(unsigned long)buffer_info->dma,
4564                                         adapter->rx_buffer_len)) {
4565                         DPRINTK(RX_ERR, ERR,
4566                                 "dma align check failed: %u bytes at %p\n",
4567                                 adapter->rx_buffer_len,
4568                                 (void *)(unsigned long)buffer_info->dma);
4569                         dev_kfree_skb(skb);
4570                         buffer_info->skb = NULL;
4571
4572                         pci_unmap_single(pdev, buffer_info->dma,
4573                                          adapter->rx_buffer_len,
4574                                          PCI_DMA_FROMDEVICE);
4575
4576                         break; /* while !buffer_info->skb */
4577                 }
4578                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4579                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4580
4581                 if (unlikely(++i == rx_ring->count))
4582                         i = 0;
4583                 buffer_info = &rx_ring->buffer_info[i];
4584         }
4585
4586         if (likely(rx_ring->next_to_use != i)) {
4587                 rx_ring->next_to_use = i;
4588                 if (unlikely(i-- == 0))
4589                         i = (rx_ring->count - 1);
4590
4591                 /* Force memory writes to complete before letting h/w
4592                  * know there are new descriptors to fetch.  (Only
4593                  * applicable for weak-ordered memory model archs,
4594                  * such as IA-64). */
4595                 wmb();
4596                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4597         }
4598 }
4599
4600 /**
4601  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4602  * @adapter: address of board private structure
4603  **/
4604
4605 static void
4606 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4607                           struct e1000_rx_ring *rx_ring,
4608                           int cleaned_count)
4609 {
4610         struct net_device *netdev = adapter->netdev;
4611         struct pci_dev *pdev = adapter->pdev;
4612         union e1000_rx_desc_packet_split *rx_desc;
4613         struct e1000_buffer *buffer_info;
4614         struct e1000_ps_page *ps_page;
4615         struct e1000_ps_page_dma *ps_page_dma;
4616         struct sk_buff *skb;
4617         unsigned int i, j;
4618
4619         i = rx_ring->next_to_use;
4620         buffer_info = &rx_ring->buffer_info[i];
4621         ps_page = &rx_ring->ps_page[i];
4622         ps_page_dma = &rx_ring->ps_page_dma[i];
4623
4624         while (cleaned_count--) {
4625                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4626
4627                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4628                         if (j < adapter->rx_ps_pages) {
4629                                 if (likely(!ps_page->ps_page[j])) {
4630                                         ps_page->ps_page[j] =
4631                                                 alloc_page(GFP_ATOMIC);
4632                                         if (unlikely(!ps_page->ps_page[j])) {
4633                                                 adapter->alloc_rx_buff_failed++;
4634                                                 goto no_buffers;
4635                                         }
4636                                         ps_page_dma->ps_page_dma[j] =
4637                                                 pci_map_page(pdev,
4638                                                             ps_page->ps_page[j],
4639                                                             0, PAGE_SIZE,
4640                                                             PCI_DMA_FROMDEVICE);
4641                                 }
4642                                 /* Refresh the desc even if buffer_addrs didn't
4643                                  * change because each write-back erases
4644                                  * this info.
4645                                  */
4646                                 rx_desc->read.buffer_addr[j+1] =
4647                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4648                         } else
4649                                 rx_desc->read.buffer_addr[j+1] = ~0;
4650                 }
4651
4652                 skb = netdev_alloc_skb(netdev,
4653                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4654
4655                 if (unlikely(!skb)) {
4656                         adapter->alloc_rx_buff_failed++;
4657                         break;
4658                 }
4659
4660                 /* Make buffer alignment 2 beyond a 16 byte boundary
4661                  * this will result in a 16 byte aligned IP header after
4662                  * the 14 byte MAC header is removed
4663                  */
4664                 skb_reserve(skb, NET_IP_ALIGN);
4665
4666                 buffer_info->skb = skb;
4667                 buffer_info->length = adapter->rx_ps_bsize0;
4668                 buffer_info->dma = pci_map_single(pdev, skb->data,
4669                                                   adapter->rx_ps_bsize0,
4670                                                   PCI_DMA_FROMDEVICE);
4671
4672                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4673
4674                 if (unlikely(++i == rx_ring->count)) i = 0;
4675                 buffer_info = &rx_ring->buffer_info[i];
4676                 ps_page = &rx_ring->ps_page[i];
4677                 ps_page_dma = &rx_ring->ps_page_dma[i];
4678         }
4679
4680 no_buffers:
4681         if (likely(rx_ring->next_to_use != i)) {
4682                 rx_ring->next_to_use = i;
4683                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4684
4685                 /* Force memory writes to complete before letting h/w
4686                  * know there are new descriptors to fetch.  (Only
4687                  * applicable for weak-ordered memory model archs,
4688                  * such as IA-64). */
4689                 wmb();
4690                 /* Hardware increments by 16 bytes, but packet split
4691                  * descriptors are 32 bytes...so we increment tail
4692                  * twice as much.
4693                  */
4694                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4695         }
4696 }
4697
4698 /**
4699  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4700  * @adapter:
4701  **/
4702
4703 static void
4704 e1000_smartspeed(struct e1000_adapter *adapter)
4705 {
4706         uint16_t phy_status;
4707         uint16_t phy_ctrl;
4708
4709         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4710            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4711                 return;
4712
4713         if (adapter->smartspeed == 0) {
4714                 /* If Master/Slave config fault is asserted twice,
4715                  * we assume back-to-back */
4716                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4717                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4718                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4719                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4720                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4721                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4722                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4723                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4724                                             phy_ctrl);
4725                         adapter->smartspeed++;
4726                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4727                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4728                                                &phy_ctrl)) {
4729                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4730                                              MII_CR_RESTART_AUTO_NEG);
4731                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4732                                                     phy_ctrl);
4733                         }
4734                 }
4735                 return;
4736         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4737                 /* If still no link, perhaps using 2/3 pair cable */
4738                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4739                 phy_ctrl |= CR_1000T_MS_ENABLE;
4740                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4741                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4742                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4743                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4744                                      MII_CR_RESTART_AUTO_NEG);
4745                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4746                 }
4747         }
4748         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4749         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4750                 adapter->smartspeed = 0;
4751 }
4752
4753 /**
4754  * e1000_ioctl -
4755  * @netdev:
4756  * @ifreq:
4757  * @cmd:
4758  **/
4759
4760 static int
4761 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4762 {
4763         switch (cmd) {
4764         case SIOCGMIIPHY:
4765         case SIOCGMIIREG:
4766         case SIOCSMIIREG:
4767                 return e1000_mii_ioctl(netdev, ifr, cmd);
4768         default:
4769                 return -EOPNOTSUPP;
4770         }
4771 }
4772
4773 /**
4774  * e1000_mii_ioctl -
4775  * @netdev:
4776  * @ifreq:
4777  * @cmd:
4778  **/
4779
4780 static int
4781 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4782 {
4783         struct e1000_adapter *adapter = netdev_priv(netdev);
4784         struct mii_ioctl_data *data = if_mii(ifr);
4785         int retval;
4786         uint16_t mii_reg;
4787         uint16_t spddplx;
4788         unsigned long flags;
4789
4790         if (adapter->hw.media_type != e1000_media_type_copper)
4791                 return -EOPNOTSUPP;
4792
4793         switch (cmd) {
4794         case SIOCGMIIPHY:
4795                 data->phy_id = adapter->hw.phy_addr;
4796                 break;
4797         case SIOCGMIIREG:
4798                 if (!capable(CAP_NET_ADMIN))
4799                         return -EPERM;
4800                 spin_lock_irqsave(&adapter->stats_lock, flags);
4801                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4802                                    &data->val_out)) {
4803                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4804                         return -EIO;
4805                 }
4806                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4807                 break;
4808         case SIOCSMIIREG:
4809                 if (!capable(CAP_NET_ADMIN))
4810                         return -EPERM;
4811                 if (data->reg_num & ~(0x1F))
4812                         return -EFAULT;
4813                 mii_reg = data->val_in;
4814                 spin_lock_irqsave(&adapter->stats_lock, flags);
4815                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4816                                         mii_reg)) {
4817                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4818                         return -EIO;
4819                 }
4820                 if (adapter->hw.media_type == e1000_media_type_copper) {
4821                         switch (data->reg_num) {
4822                         case PHY_CTRL:
4823                                 if (mii_reg & MII_CR_POWER_DOWN)
4824                                         break;
4825                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4826                                         adapter->hw.autoneg = 1;
4827                                         adapter->hw.autoneg_advertised = 0x2F;
4828                                 } else {
4829                                         if (mii_reg & 0x40)
4830                                                 spddplx = SPEED_1000;
4831                                         else if (mii_reg & 0x2000)
4832                                                 spddplx = SPEED_100;
4833                                         else
4834                                                 spddplx = SPEED_10;
4835                                         spddplx += (mii_reg & 0x100)
4836                                                    ? DUPLEX_FULL :
4837                                                    DUPLEX_HALF;
4838                                         retval = e1000_set_spd_dplx(adapter,
4839                                                                     spddplx);
4840                                         if (retval) {
4841                                                 spin_unlock_irqrestore(
4842                                                         &adapter->stats_lock,
4843                                                         flags);
4844                                                 return retval;
4845                                         }
4846                                 }
4847                                 if (netif_running(adapter->netdev))
4848                                         e1000_reinit_locked(adapter);
4849                                 else
4850                                         e1000_reset(adapter);
4851                                 break;
4852                         case M88E1000_PHY_SPEC_CTRL:
4853                         case M88E1000_EXT_PHY_SPEC_CTRL:
4854                                 if (e1000_phy_reset(&adapter->hw)) {
4855                                         spin_unlock_irqrestore(
4856                                                 &adapter->stats_lock, flags);
4857                                         return -EIO;
4858                                 }
4859                                 break;
4860                         }
4861                 } else {
4862                         switch (data->reg_num) {
4863                         case PHY_CTRL:
4864                                 if (mii_reg & MII_CR_POWER_DOWN)
4865                                         break;
4866                                 if (netif_running(adapter->netdev))
4867                                         e1000_reinit_locked(adapter);
4868                                 else
4869                                         e1000_reset(adapter);
4870                                 break;
4871                         }
4872                 }
4873                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4874                 break;
4875         default:
4876                 return -EOPNOTSUPP;
4877         }
4878         return E1000_SUCCESS;
4879 }
4880
4881 void
4882 e1000_pci_set_mwi(struct e1000_hw *hw)
4883 {
4884         struct e1000_adapter *adapter = hw->back;
4885         int ret_val = pci_set_mwi(adapter->pdev);
4886
4887         if (ret_val)
4888                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4889 }
4890
4891 void
4892 e1000_pci_clear_mwi(struct e1000_hw *hw)
4893 {
4894         struct e1000_adapter *adapter = hw->back;
4895
4896         pci_clear_mwi(adapter->pdev);
4897 }
4898
4899 void
4900 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4901 {
4902         struct e1000_adapter *adapter = hw->back;
4903
4904         pci_read_config_word(adapter->pdev, reg, value);
4905 }
4906
4907 void
4908 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4909 {
4910         struct e1000_adapter *adapter = hw->back;
4911
4912         pci_write_config_word(adapter->pdev, reg, *value);
4913 }
4914
4915 int32_t
4916 e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4917 {
4918     struct e1000_adapter *adapter = hw->back;
4919     uint16_t cap_offset;
4920
4921     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4922     if (!cap_offset)
4923         return -E1000_ERR_CONFIG;
4924
4925     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4926
4927     return E1000_SUCCESS;
4928 }
4929
4930 void
4931 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4932 {
4933         outl(value, port);
4934 }
4935
4936 static void
4937 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4938 {
4939         struct e1000_adapter *adapter = netdev_priv(netdev);
4940         uint32_t ctrl, rctl;
4941
4942         e1000_irq_disable(adapter);
4943         adapter->vlgrp = grp;
4944
4945         if (grp) {
4946                 /* enable VLAN tag insert/strip */
4947                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4948                 ctrl |= E1000_CTRL_VME;
4949                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4950
4951                 if (adapter->hw.mac_type != e1000_ich8lan) {
4952                         /* enable VLAN receive filtering */
4953                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4954                         rctl |= E1000_RCTL_VFE;
4955                         rctl &= ~E1000_RCTL_CFIEN;
4956                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4957                         e1000_update_mng_vlan(adapter);
4958                 }
4959         } else {
4960                 /* disable VLAN tag insert/strip */
4961                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4962                 ctrl &= ~E1000_CTRL_VME;
4963                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4964
4965                 if (adapter->hw.mac_type != e1000_ich8lan) {
4966                         /* disable VLAN filtering */
4967                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4968                         rctl &= ~E1000_RCTL_VFE;
4969                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4970                         if (adapter->mng_vlan_id !=
4971                             (uint16_t)E1000_MNG_VLAN_NONE) {
4972                                 e1000_vlan_rx_kill_vid(netdev,
4973                                                        adapter->mng_vlan_id);
4974                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4975                         }
4976                 }
4977         }
4978
4979         e1000_irq_enable(adapter);
4980 }
4981
4982 static void
4983 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4984 {
4985         struct e1000_adapter *adapter = netdev_priv(netdev);
4986         uint32_t vfta, index;
4987
4988         if ((adapter->hw.mng_cookie.status &
4989              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4990             (vid == adapter->mng_vlan_id))
4991                 return;
4992         /* add VID to filter table */
4993         index = (vid >> 5) & 0x7F;
4994         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4995         vfta |= (1 << (vid & 0x1F));
4996         e1000_write_vfta(&adapter->hw, index, vfta);
4997 }
4998
4999 static void
5000 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
5001 {
5002         struct e1000_adapter *adapter = netdev_priv(netdev);
5003         uint32_t vfta, index;
5004
5005         e1000_irq_disable(adapter);
5006         vlan_group_set_device(adapter->vlgrp, vid, NULL);
5007         e1000_irq_enable(adapter);
5008
5009         if ((adapter->hw.mng_cookie.status &
5010              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5011             (vid == adapter->mng_vlan_id)) {
5012                 /* release control to f/w */
5013                 e1000_release_hw_control(adapter);
5014                 return;
5015         }
5016
5017         /* remove VID from filter table */
5018         index = (vid >> 5) & 0x7F;
5019         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5020         vfta &= ~(1 << (vid & 0x1F));
5021         e1000_write_vfta(&adapter->hw, index, vfta);
5022 }
5023
5024 static void
5025 e1000_restore_vlan(struct e1000_adapter *adapter)
5026 {
5027         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5028
5029         if (adapter->vlgrp) {
5030                 uint16_t vid;
5031                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5032                         if (!vlan_group_get_device(adapter->vlgrp, vid))
5033                                 continue;
5034                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
5035                 }
5036         }
5037 }
5038
5039 int
5040 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
5041 {
5042         adapter->hw.autoneg = 0;
5043
5044         /* Fiber NICs only allow 1000 gbps Full duplex */
5045         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
5046                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5047                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5048                 return -EINVAL;
5049         }
5050
5051         switch (spddplx) {
5052         case SPEED_10 + DUPLEX_HALF:
5053                 adapter->hw.forced_speed_duplex = e1000_10_half;
5054                 break;
5055         case SPEED_10 + DUPLEX_FULL:
5056                 adapter->hw.forced_speed_duplex = e1000_10_full;
5057                 break;
5058         case SPEED_100 + DUPLEX_HALF:
5059                 adapter->hw.forced_speed_duplex = e1000_100_half;
5060                 break;
5061         case SPEED_100 + DUPLEX_FULL:
5062                 adapter->hw.forced_speed_duplex = e1000_100_full;
5063                 break;
5064         case SPEED_1000 + DUPLEX_FULL:
5065                 adapter->hw.autoneg = 1;
5066                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5067                 break;
5068         case SPEED_1000 + DUPLEX_HALF: /* not supported */
5069         default:
5070                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5071                 return -EINVAL;
5072         }
5073         return 0;
5074 }
5075
5076 static int
5077 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5078 {
5079         struct net_device *netdev = pci_get_drvdata(pdev);
5080         struct e1000_adapter *adapter = netdev_priv(netdev);
5081         uint32_t ctrl, ctrl_ext, rctl, status;
5082         uint32_t wufc = adapter->wol;
5083 #ifdef CONFIG_PM
5084         int retval = 0;
5085 #endif
5086
5087         netif_device_detach(netdev);
5088
5089         if (netif_running(netdev)) {
5090                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5091                 e1000_down(adapter);
5092         }
5093
5094 #ifdef CONFIG_PM
5095         retval = pci_save_state(pdev);
5096         if (retval)
5097                 return retval;
5098 #endif
5099
5100         status = E1000_READ_REG(&adapter->hw, STATUS);
5101         if (status & E1000_STATUS_LU)
5102                 wufc &= ~E1000_WUFC_LNKC;
5103
5104         if (wufc) {
5105                 e1000_setup_rctl(adapter);
5106                 e1000_set_multi(netdev);
5107
5108                 /* turn on all-multi mode if wake on multicast is enabled */
5109                 if (wufc & E1000_WUFC_MC) {
5110                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
5111                         rctl |= E1000_RCTL_MPE;
5112                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5113                 }
5114
5115                 if (adapter->hw.mac_type >= e1000_82540) {
5116                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5117                         /* advertise wake from D3Cold */
5118                         #define E1000_CTRL_ADVD3WUC 0x00100000
5119                         /* phy power management enable */
5120                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5121                         ctrl |= E1000_CTRL_ADVD3WUC |
5122                                 E1000_CTRL_EN_PHY_PWR_MGMT;
5123                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5124                 }
5125
5126                 if (adapter->hw.media_type == e1000_media_type_fiber ||
5127                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
5128                         /* keep the laser running in D3 */
5129                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
5130                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5131                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
5132                 }
5133
5134                 /* Allow time for pending master requests to run */
5135                 e1000_disable_pciex_master(&adapter->hw);
5136
5137                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
5138                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
5139                 pci_enable_wake(pdev, PCI_D3hot, 1);
5140                 pci_enable_wake(pdev, PCI_D3cold, 1);
5141         } else {
5142                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
5143                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
5144                 pci_enable_wake(pdev, PCI_D3hot, 0);
5145                 pci_enable_wake(pdev, PCI_D3cold, 0);
5146         }
5147
5148         e1000_release_manageability(adapter);
5149
5150         /* make sure adapter isn't asleep if manageability is enabled */
5151         if (adapter->en_mng_pt) {
5152                 pci_enable_wake(pdev, PCI_D3hot, 1);
5153                 pci_enable_wake(pdev, PCI_D3cold, 1);
5154         }
5155
5156         if (adapter->hw.phy_type == e1000_phy_igp_3)
5157                 e1000_phy_powerdown_workaround(&adapter->hw);
5158
5159         if (netif_running(netdev))
5160                 e1000_free_irq(adapter);
5161
5162         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
5163          * would have already happened in close and is redundant. */
5164         e1000_release_hw_control(adapter);
5165
5166         pci_disable_device(pdev);
5167
5168         pci_set_power_state(pdev, pci_choose_state(pdev, state));
5169
5170         return 0;
5171 }
5172
5173 #ifdef CONFIG_PM
5174 static int
5175 e1000_resume(struct pci_dev *pdev)
5176 {
5177         struct net_device *netdev = pci_get_drvdata(pdev);
5178         struct e1000_adapter *adapter = netdev_priv(netdev);
5179         uint32_t err;
5180
5181         pci_set_power_state(pdev, PCI_D0);
5182         pci_restore_state(pdev);
5183         if ((err = pci_enable_device(pdev))) {
5184                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5185                 return err;
5186         }
5187         pci_set_master(pdev);
5188
5189         pci_enable_wake(pdev, PCI_D3hot, 0);
5190         pci_enable_wake(pdev, PCI_D3cold, 0);
5191
5192         if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5193                 return err;
5194
5195         e1000_power_up_phy(adapter);
5196         e1000_reset(adapter);
5197         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5198
5199         e1000_init_manageability(adapter);
5200
5201         if (netif_running(netdev))
5202                 e1000_up(adapter);
5203
5204         netif_device_attach(netdev);
5205
5206         /* If the controller is 82573 and f/w is AMT, do not set
5207          * DRV_LOAD until the interface is up.  For all other cases,
5208          * let the f/w know that the h/w is now under the control
5209          * of the driver. */
5210         if (adapter->hw.mac_type != e1000_82573 ||
5211             !e1000_check_mng_mode(&adapter->hw))
5212                 e1000_get_hw_control(adapter);
5213
5214         return 0;
5215 }
5216 #endif
5217
5218 static void e1000_shutdown(struct pci_dev *pdev)
5219 {
5220         e1000_suspend(pdev, PMSG_SUSPEND);
5221 }
5222
5223 #ifdef CONFIG_NET_POLL_CONTROLLER
5224 /*
5225  * Polling 'interrupt' - used by things like netconsole to send skbs
5226  * without having to re-enable interrupts. It's not called while
5227  * the interrupt routine is executing.
5228  */
5229 static void
5230 e1000_netpoll(struct net_device *netdev)
5231 {
5232         struct e1000_adapter *adapter = netdev_priv(netdev);
5233
5234         disable_irq(adapter->pdev->irq);
5235         e1000_intr(adapter->pdev->irq, netdev);
5236         e1000_clean_tx_irq(adapter, adapter->tx_ring);
5237 #ifndef CONFIG_E1000_NAPI
5238         adapter->clean_rx(adapter, adapter->rx_ring);
5239 #endif
5240         enable_irq(adapter->pdev->irq);
5241 }
5242 #endif
5243
5244 /**
5245  * e1000_io_error_detected - called when PCI error is detected
5246  * @pdev: Pointer to PCI device
5247  * @state: The current pci conneection state
5248  *
5249  * This function is called after a PCI bus error affecting
5250  * this device has been detected.
5251  */
5252 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
5253 {
5254         struct net_device *netdev = pci_get_drvdata(pdev);
5255         struct e1000_adapter *adapter = netdev->priv;
5256
5257         netif_device_detach(netdev);
5258
5259         if (netif_running(netdev))
5260                 e1000_down(adapter);
5261         pci_disable_device(pdev);
5262
5263         /* Request a slot slot reset. */
5264         return PCI_ERS_RESULT_NEED_RESET;
5265 }
5266
5267 /**
5268  * e1000_io_slot_reset - called after the pci bus has been reset.
5269  * @pdev: Pointer to PCI device
5270  *
5271  * Restart the card from scratch, as if from a cold-boot. Implementation
5272  * resembles the first-half of the e1000_resume routine.
5273  */
5274 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5275 {
5276         struct net_device *netdev = pci_get_drvdata(pdev);
5277         struct e1000_adapter *adapter = netdev->priv;
5278
5279         if (pci_enable_device(pdev)) {
5280                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5281                 return PCI_ERS_RESULT_DISCONNECT;
5282         }
5283         pci_set_master(pdev);
5284
5285         pci_enable_wake(pdev, PCI_D3hot, 0);
5286         pci_enable_wake(pdev, PCI_D3cold, 0);
5287
5288         e1000_reset(adapter);
5289         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5290
5291         return PCI_ERS_RESULT_RECOVERED;
5292 }
5293
5294 /**
5295  * e1000_io_resume - called when traffic can start flowing again.
5296  * @pdev: Pointer to PCI device
5297  *
5298  * This callback is called when the error recovery driver tells us that
5299  * its OK to resume normal operation. Implementation resembles the
5300  * second-half of the e1000_resume routine.
5301  */
5302 static void e1000_io_resume(struct pci_dev *pdev)
5303 {
5304         struct net_device *netdev = pci_get_drvdata(pdev);
5305         struct e1000_adapter *adapter = netdev->priv;
5306
5307         e1000_init_manageability(adapter);
5308
5309         if (netif_running(netdev)) {
5310                 if (e1000_up(adapter)) {
5311                         printk("e1000: can't bring device back up after reset\n");
5312                         return;
5313                 }
5314         }
5315
5316         netif_device_attach(netdev);
5317
5318         /* If the controller is 82573 and f/w is AMT, do not set
5319          * DRV_LOAD until the interface is up.  For all other cases,
5320          * let the f/w know that the h/w is now under the control
5321          * of the driver. */
5322         if (adapter->hw.mac_type != e1000_82573 ||
5323             !e1000_check_mng_mode(&adapter->hw))
5324                 e1000_get_hw_control(adapter);
5325
5326 }
5327
5328 /* e1000_main.c */