Merge branch 'master' into upstream
[sfrench/cifs-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
31 char e1000_driver_name[] = "e1000";
32 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
33 #ifndef CONFIG_E1000_NAPI
34 #define DRIVERNAPI
35 #else
36 #define DRIVERNAPI "-NAPI"
37 #endif
38 #define DRV_VERSION "7.2.9-k2"DRIVERNAPI
39 char e1000_driver_version[] = DRV_VERSION;
40 static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
41
42 /* e1000_pci_tbl - PCI Device ID Table
43  *
44  * Last entry must be all 0s
45  *
46  * Macro expands to...
47  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
48  */
49 static struct pci_device_id e1000_pci_tbl[] = {
50         INTEL_E1000_ETHERNET_DEVICE(0x1000),
51         INTEL_E1000_ETHERNET_DEVICE(0x1001),
52         INTEL_E1000_ETHERNET_DEVICE(0x1004),
53         INTEL_E1000_ETHERNET_DEVICE(0x1008),
54         INTEL_E1000_ETHERNET_DEVICE(0x1009),
55         INTEL_E1000_ETHERNET_DEVICE(0x100C),
56         INTEL_E1000_ETHERNET_DEVICE(0x100D),
57         INTEL_E1000_ETHERNET_DEVICE(0x100E),
58         INTEL_E1000_ETHERNET_DEVICE(0x100F),
59         INTEL_E1000_ETHERNET_DEVICE(0x1010),
60         INTEL_E1000_ETHERNET_DEVICE(0x1011),
61         INTEL_E1000_ETHERNET_DEVICE(0x1012),
62         INTEL_E1000_ETHERNET_DEVICE(0x1013),
63         INTEL_E1000_ETHERNET_DEVICE(0x1014),
64         INTEL_E1000_ETHERNET_DEVICE(0x1015),
65         INTEL_E1000_ETHERNET_DEVICE(0x1016),
66         INTEL_E1000_ETHERNET_DEVICE(0x1017),
67         INTEL_E1000_ETHERNET_DEVICE(0x1018),
68         INTEL_E1000_ETHERNET_DEVICE(0x1019),
69         INTEL_E1000_ETHERNET_DEVICE(0x101A),
70         INTEL_E1000_ETHERNET_DEVICE(0x101D),
71         INTEL_E1000_ETHERNET_DEVICE(0x101E),
72         INTEL_E1000_ETHERNET_DEVICE(0x1026),
73         INTEL_E1000_ETHERNET_DEVICE(0x1027),
74         INTEL_E1000_ETHERNET_DEVICE(0x1028),
75         INTEL_E1000_ETHERNET_DEVICE(0x1049),
76         INTEL_E1000_ETHERNET_DEVICE(0x104A),
77         INTEL_E1000_ETHERNET_DEVICE(0x104B),
78         INTEL_E1000_ETHERNET_DEVICE(0x104C),
79         INTEL_E1000_ETHERNET_DEVICE(0x104D),
80         INTEL_E1000_ETHERNET_DEVICE(0x105E),
81         INTEL_E1000_ETHERNET_DEVICE(0x105F),
82         INTEL_E1000_ETHERNET_DEVICE(0x1060),
83         INTEL_E1000_ETHERNET_DEVICE(0x1075),
84         INTEL_E1000_ETHERNET_DEVICE(0x1076),
85         INTEL_E1000_ETHERNET_DEVICE(0x1077),
86         INTEL_E1000_ETHERNET_DEVICE(0x1078),
87         INTEL_E1000_ETHERNET_DEVICE(0x1079),
88         INTEL_E1000_ETHERNET_DEVICE(0x107A),
89         INTEL_E1000_ETHERNET_DEVICE(0x107B),
90         INTEL_E1000_ETHERNET_DEVICE(0x107C),
91         INTEL_E1000_ETHERNET_DEVICE(0x107D),
92         INTEL_E1000_ETHERNET_DEVICE(0x107E),
93         INTEL_E1000_ETHERNET_DEVICE(0x107F),
94         INTEL_E1000_ETHERNET_DEVICE(0x108A),
95         INTEL_E1000_ETHERNET_DEVICE(0x108B),
96         INTEL_E1000_ETHERNET_DEVICE(0x108C),
97         INTEL_E1000_ETHERNET_DEVICE(0x1096),
98         INTEL_E1000_ETHERNET_DEVICE(0x1098),
99         INTEL_E1000_ETHERNET_DEVICE(0x1099),
100         INTEL_E1000_ETHERNET_DEVICE(0x109A),
101         INTEL_E1000_ETHERNET_DEVICE(0x10A4),
102         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
103         INTEL_E1000_ETHERNET_DEVICE(0x10B9),
104         INTEL_E1000_ETHERNET_DEVICE(0x10BA),
105         INTEL_E1000_ETHERNET_DEVICE(0x10BB),
106         /* required last entry */
107         {0,}
108 };
109
110 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
111
112 int e1000_up(struct e1000_adapter *adapter);
113 void e1000_down(struct e1000_adapter *adapter);
114 void e1000_reinit_locked(struct e1000_adapter *adapter);
115 void e1000_reset(struct e1000_adapter *adapter);
116 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
117 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
118 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
119 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
120 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
121 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
122                              struct e1000_tx_ring *txdr);
123 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
124                              struct e1000_rx_ring *rxdr);
125 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
126                              struct e1000_tx_ring *tx_ring);
127 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
128                              struct e1000_rx_ring *rx_ring);
129 void e1000_update_stats(struct e1000_adapter *adapter);
130
131 static int e1000_init_module(void);
132 static void e1000_exit_module(void);
133 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
134 static void __devexit e1000_remove(struct pci_dev *pdev);
135 static int e1000_alloc_queues(struct e1000_adapter *adapter);
136 static int e1000_sw_init(struct e1000_adapter *adapter);
137 static int e1000_open(struct net_device *netdev);
138 static int e1000_close(struct net_device *netdev);
139 static void e1000_configure_tx(struct e1000_adapter *adapter);
140 static void e1000_configure_rx(struct e1000_adapter *adapter);
141 static void e1000_setup_rctl(struct e1000_adapter *adapter);
142 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
143 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
144 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
145                                 struct e1000_tx_ring *tx_ring);
146 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
147                                 struct e1000_rx_ring *rx_ring);
148 static void e1000_set_multi(struct net_device *netdev);
149 static void e1000_update_phy_info(unsigned long data);
150 static void e1000_watchdog(unsigned long data);
151 static void e1000_82547_tx_fifo_stall(unsigned long data);
152 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
153 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
154 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
155 static int e1000_set_mac(struct net_device *netdev, void *p);
156 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
157 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
158                                     struct e1000_tx_ring *tx_ring);
159 #ifdef CONFIG_E1000_NAPI
160 static int e1000_clean(struct net_device *poll_dev, int *budget);
161 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
162                                     struct e1000_rx_ring *rx_ring,
163                                     int *work_done, int work_to_do);
164 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
165                                        struct e1000_rx_ring *rx_ring,
166                                        int *work_done, int work_to_do);
167 #else
168 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
169                                     struct e1000_rx_ring *rx_ring);
170 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
171                                        struct e1000_rx_ring *rx_ring);
172 #endif
173 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
174                                    struct e1000_rx_ring *rx_ring,
175                                    int cleaned_count);
176 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
177                                       struct e1000_rx_ring *rx_ring,
178                                       int cleaned_count);
179 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
180 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
181                            int cmd);
182 void e1000_set_ethtool_ops(struct net_device *netdev);
183 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
184 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
185 static void e1000_tx_timeout(struct net_device *dev);
186 static void e1000_reset_task(struct net_device *dev);
187 static void e1000_smartspeed(struct e1000_adapter *adapter);
188 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
189                                        struct sk_buff *skb);
190
191 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
192 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
193 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
194 static void e1000_restore_vlan(struct e1000_adapter *adapter);
195
196 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
197 #ifdef CONFIG_PM
198 static int e1000_resume(struct pci_dev *pdev);
199 #endif
200 static void e1000_shutdown(struct pci_dev *pdev);
201
202 #ifdef CONFIG_NET_POLL_CONTROLLER
203 /* for netdump / net console */
204 static void e1000_netpoll (struct net_device *netdev);
205 #endif
206
207 extern void e1000_check_options(struct e1000_adapter *adapter);
208
209 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
210                      pci_channel_state_t state);
211 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
212 static void e1000_io_resume(struct pci_dev *pdev);
213
214 static struct pci_error_handlers e1000_err_handler = {
215         .error_detected = e1000_io_error_detected,
216         .slot_reset = e1000_io_slot_reset,
217         .resume = e1000_io_resume,
218 };
219
220 static struct pci_driver e1000_driver = {
221         .name     = e1000_driver_name,
222         .id_table = e1000_pci_tbl,
223         .probe    = e1000_probe,
224         .remove   = __devexit_p(e1000_remove),
225 #ifdef CONFIG_PM
226         /* Power Managment Hooks */
227         .suspend  = e1000_suspend,
228         .resume   = e1000_resume,
229 #endif
230         .shutdown = e1000_shutdown,
231         .err_handler = &e1000_err_handler
232 };
233
234 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
235 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
236 MODULE_LICENSE("GPL");
237 MODULE_VERSION(DRV_VERSION);
238
239 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
240 module_param(debug, int, 0);
241 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
242
243 /**
244  * e1000_init_module - Driver Registration Routine
245  *
246  * e1000_init_module is the first routine called when the driver is
247  * loaded. All it does is register with the PCI subsystem.
248  **/
249
250 static int __init
251 e1000_init_module(void)
252 {
253         int ret;
254         printk(KERN_INFO "%s - version %s\n",
255                e1000_driver_string, e1000_driver_version);
256
257         printk(KERN_INFO "%s\n", e1000_copyright);
258
259         ret = pci_register_driver(&e1000_driver);
260
261         return ret;
262 }
263
264 module_init(e1000_init_module);
265
266 /**
267  * e1000_exit_module - Driver Exit Cleanup Routine
268  *
269  * e1000_exit_module is called just before the driver is removed
270  * from memory.
271  **/
272
273 static void __exit
274 e1000_exit_module(void)
275 {
276         pci_unregister_driver(&e1000_driver);
277 }
278
279 module_exit(e1000_exit_module);
280
281 static int e1000_request_irq(struct e1000_adapter *adapter)
282 {
283         struct net_device *netdev = adapter->netdev;
284         int flags, err = 0;
285
286         flags = IRQF_SHARED;
287 #ifdef CONFIG_PCI_MSI
288         if (adapter->hw.mac_type > e1000_82547_rev_2) {
289                 adapter->have_msi = TRUE;
290                 if ((err = pci_enable_msi(adapter->pdev))) {
291                         DPRINTK(PROBE, ERR,
292                          "Unable to allocate MSI interrupt Error: %d\n", err);
293                         adapter->have_msi = FALSE;
294                 }
295         }
296         if (adapter->have_msi)
297                 flags &= ~IRQF_SHARED;
298 #endif
299         if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
300                                netdev->name, netdev)))
301                 DPRINTK(PROBE, ERR,
302                         "Unable to allocate interrupt Error: %d\n", err);
303
304         return err;
305 }
306
307 static void e1000_free_irq(struct e1000_adapter *adapter)
308 {
309         struct net_device *netdev = adapter->netdev;
310
311         free_irq(adapter->pdev->irq, netdev);
312
313 #ifdef CONFIG_PCI_MSI
314         if (adapter->have_msi)
315                 pci_disable_msi(adapter->pdev);
316 #endif
317 }
318
319 /**
320  * e1000_irq_disable - Mask off interrupt generation on the NIC
321  * @adapter: board private structure
322  **/
323
324 static void
325 e1000_irq_disable(struct e1000_adapter *adapter)
326 {
327         atomic_inc(&adapter->irq_sem);
328         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
329         E1000_WRITE_FLUSH(&adapter->hw);
330         synchronize_irq(adapter->pdev->irq);
331 }
332
333 /**
334  * e1000_irq_enable - Enable default interrupt generation settings
335  * @adapter: board private structure
336  **/
337
338 static void
339 e1000_irq_enable(struct e1000_adapter *adapter)
340 {
341         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
342                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
343                 E1000_WRITE_FLUSH(&adapter->hw);
344         }
345 }
346
347 static void
348 e1000_update_mng_vlan(struct e1000_adapter *adapter)
349 {
350         struct net_device *netdev = adapter->netdev;
351         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
352         uint16_t old_vid = adapter->mng_vlan_id;
353         if (adapter->vlgrp) {
354                 if (!adapter->vlgrp->vlan_devices[vid]) {
355                         if (adapter->hw.mng_cookie.status &
356                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
357                                 e1000_vlan_rx_add_vid(netdev, vid);
358                                 adapter->mng_vlan_id = vid;
359                         } else
360                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
361
362                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
363                                         (vid != old_vid) &&
364                                         !adapter->vlgrp->vlan_devices[old_vid])
365                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
366                 } else
367                         adapter->mng_vlan_id = vid;
368         }
369 }
370
371 /**
372  * e1000_release_hw_control - release control of the h/w to f/w
373  * @adapter: address of board private structure
374  *
375  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
376  * For ASF and Pass Through versions of f/w this means that the
377  * driver is no longer loaded. For AMT version (only with 82573) i
378  * of the f/w this means that the netowrk i/f is closed.
379  *
380  **/
381
382 static void
383 e1000_release_hw_control(struct e1000_adapter *adapter)
384 {
385         uint32_t ctrl_ext;
386         uint32_t swsm;
387         uint32_t extcnf;
388
389         /* Let firmware taken over control of h/w */
390         switch (adapter->hw.mac_type) {
391         case e1000_82571:
392         case e1000_82572:
393         case e1000_80003es2lan:
394                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
395                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
396                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
397                 break;
398         case e1000_82573:
399                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
400                 E1000_WRITE_REG(&adapter->hw, SWSM,
401                                 swsm & ~E1000_SWSM_DRV_LOAD);
402         case e1000_ich8lan:
403                 extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT);
404                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
405                                 extcnf & ~E1000_CTRL_EXT_DRV_LOAD);
406                 break;
407         default:
408                 break;
409         }
410 }
411
412 /**
413  * e1000_get_hw_control - get control of the h/w from f/w
414  * @adapter: address of board private structure
415  *
416  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
417  * For ASF and Pass Through versions of f/w this means that
418  * the driver is loaded. For AMT version (only with 82573)
419  * of the f/w this means that the netowrk i/f is open.
420  *
421  **/
422
423 static void
424 e1000_get_hw_control(struct e1000_adapter *adapter)
425 {
426         uint32_t ctrl_ext;
427         uint32_t swsm;
428         uint32_t extcnf;
429         /* Let firmware know the driver has taken over */
430         switch (adapter->hw.mac_type) {
431         case e1000_82571:
432         case e1000_82572:
433         case e1000_80003es2lan:
434                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
435                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
436                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
437                 break;
438         case e1000_82573:
439                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
440                 E1000_WRITE_REG(&adapter->hw, SWSM,
441                                 swsm | E1000_SWSM_DRV_LOAD);
442                 break;
443         case e1000_ich8lan:
444                 extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);
445                 E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,
446                                 extcnf | E1000_EXTCNF_CTRL_SWFLAG);
447                 break;
448         default:
449                 break;
450         }
451 }
452
453 int
454 e1000_up(struct e1000_adapter *adapter)
455 {
456         struct net_device *netdev = adapter->netdev;
457         int i;
458
459         /* hardware has been reset, we need to reload some things */
460
461         e1000_set_multi(netdev);
462
463         e1000_restore_vlan(adapter);
464
465         e1000_configure_tx(adapter);
466         e1000_setup_rctl(adapter);
467         e1000_configure_rx(adapter);
468         /* call E1000_DESC_UNUSED which always leaves
469          * at least 1 descriptor unused to make sure
470          * next_to_use != next_to_clean */
471         for (i = 0; i < adapter->num_rx_queues; i++) {
472                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
473                 adapter->alloc_rx_buf(adapter, ring,
474                                       E1000_DESC_UNUSED(ring));
475         }
476
477         adapter->tx_queue_len = netdev->tx_queue_len;
478
479 #ifdef CONFIG_E1000_NAPI
480         netif_poll_enable(netdev);
481 #endif
482         e1000_irq_enable(adapter);
483
484         clear_bit(__E1000_DOWN, &adapter->flags);
485
486         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
487         return 0;
488 }
489
490 /**
491  * e1000_power_up_phy - restore link in case the phy was powered down
492  * @adapter: address of board private structure
493  *
494  * The phy may be powered down to save power and turn off link when the
495  * driver is unloaded and wake on lan is not enabled (among others)
496  * *** this routine MUST be followed by a call to e1000_reset ***
497  *
498  **/
499
500 void e1000_power_up_phy(struct e1000_adapter *adapter)
501 {
502         uint16_t mii_reg = 0;
503
504         /* Just clear the power down bit to wake the phy back up */
505         if (adapter->hw.media_type == e1000_media_type_copper) {
506                 /* according to the manual, the phy will retain its
507                  * settings across a power-down/up cycle */
508                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
509                 mii_reg &= ~MII_CR_POWER_DOWN;
510                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
511         }
512 }
513
514 static void e1000_power_down_phy(struct e1000_adapter *adapter)
515 {
516         /* Power down the PHY so no link is implied when interface is down *
517          * The PHY cannot be powered down if any of the following is TRUE *
518          * (a) WoL is enabled
519          * (b) AMT is active
520          * (c) SoL/IDER session is active */
521         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
522            adapter->hw.media_type == e1000_media_type_copper) {
523                 uint16_t mii_reg = 0;
524
525                 switch (adapter->hw.mac_type) {
526                 case e1000_82540:
527                 case e1000_82545:
528                 case e1000_82545_rev_3:
529                 case e1000_82546:
530                 case e1000_82546_rev_3:
531                 case e1000_82541:
532                 case e1000_82541_rev_2:
533                 case e1000_82547:
534                 case e1000_82547_rev_2:
535                         if (E1000_READ_REG(&adapter->hw, MANC) &
536                             E1000_MANC_SMBUS_EN)
537                                 goto out;
538                         break;
539                 case e1000_82571:
540                 case e1000_82572:
541                 case e1000_82573:
542                 case e1000_80003es2lan:
543                 case e1000_ich8lan:
544                         if (e1000_check_mng_mode(&adapter->hw) ||
545                             e1000_check_phy_reset_block(&adapter->hw))
546                                 goto out;
547                         break;
548                 default:
549                         goto out;
550                 }
551                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
552                 mii_reg |= MII_CR_POWER_DOWN;
553                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
554                 mdelay(1);
555         }
556 out:
557         return;
558 }
559
560 void
561 e1000_down(struct e1000_adapter *adapter)
562 {
563         struct net_device *netdev = adapter->netdev;
564
565         /* signal that we're down so the interrupt handler does not
566          * reschedule our watchdog timer */
567         set_bit(__E1000_DOWN, &adapter->flags);
568
569         e1000_irq_disable(adapter);
570
571         del_timer_sync(&adapter->tx_fifo_stall_timer);
572         del_timer_sync(&adapter->watchdog_timer);
573         del_timer_sync(&adapter->phy_info_timer);
574
575 #ifdef CONFIG_E1000_NAPI
576         netif_poll_disable(netdev);
577 #endif
578         netdev->tx_queue_len = adapter->tx_queue_len;
579         adapter->link_speed = 0;
580         adapter->link_duplex = 0;
581         netif_carrier_off(netdev);
582         netif_stop_queue(netdev);
583
584         e1000_reset(adapter);
585         e1000_clean_all_tx_rings(adapter);
586         e1000_clean_all_rx_rings(adapter);
587 }
588
589 void
590 e1000_reinit_locked(struct e1000_adapter *adapter)
591 {
592         WARN_ON(in_interrupt());
593         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
594                 msleep(1);
595         e1000_down(adapter);
596         e1000_up(adapter);
597         clear_bit(__E1000_RESETTING, &adapter->flags);
598 }
599
600 void
601 e1000_reset(struct e1000_adapter *adapter)
602 {
603         uint32_t pba, manc;
604 #ifdef DISABLE_MULR
605         uint32_t tctl;
606 #endif
607         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
608
609         /* Repartition Pba for greater than 9k mtu
610          * To take effect CTRL.RST is required.
611          */
612
613         switch (adapter->hw.mac_type) {
614         case e1000_82547:
615         case e1000_82547_rev_2:
616                 pba = E1000_PBA_30K;
617                 break;
618         case e1000_82571:
619         case e1000_82572:
620         case e1000_80003es2lan:
621                 pba = E1000_PBA_38K;
622                 break;
623         case e1000_82573:
624                 pba = E1000_PBA_12K;
625                 break;
626         case e1000_ich8lan:
627                 pba = E1000_PBA_8K;
628                 break;
629         default:
630                 pba = E1000_PBA_48K;
631                 break;
632         }
633
634         if ((adapter->hw.mac_type != e1000_82573) &&
635            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
636                 pba -= 8; /* allocate more FIFO for Tx */
637
638
639         if (adapter->hw.mac_type == e1000_82547) {
640                 adapter->tx_fifo_head = 0;
641                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
642                 adapter->tx_fifo_size =
643                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
644                 atomic_set(&adapter->tx_fifo_stall, 0);
645         }
646
647         E1000_WRITE_REG(&adapter->hw, PBA, pba);
648
649         /* flow control settings */
650         /* Set the FC high water mark to 90% of the FIFO size.
651          * Required to clear last 3 LSB */
652         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
653         /* We can't use 90% on small FIFOs because the remainder
654          * would be less than 1 full frame.  In this case, we size
655          * it to allow at least a full frame above the high water
656          *  mark. */
657         if (pba < E1000_PBA_16K)
658                 fc_high_water_mark = (pba * 1024) - 1600;
659
660         adapter->hw.fc_high_water = fc_high_water_mark;
661         adapter->hw.fc_low_water = fc_high_water_mark - 8;
662         if (adapter->hw.mac_type == e1000_80003es2lan)
663                 adapter->hw.fc_pause_time = 0xFFFF;
664         else
665                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
666         adapter->hw.fc_send_xon = 1;
667         adapter->hw.fc = adapter->hw.original_fc;
668
669         /* Allow time for pending master requests to run */
670         e1000_reset_hw(&adapter->hw);
671         if (adapter->hw.mac_type >= e1000_82544)
672                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
673 #ifdef DISABLE_MULR
674         /* disable Multiple Reads in Transmit Control Register for debugging */
675         tctl = E1000_READ_REG(hw, TCTL);
676         E1000_WRITE_REG(hw, TCTL, tctl & ~E1000_TCTL_MULR);
677
678 #endif
679         if (e1000_init_hw(&adapter->hw))
680                 DPRINTK(PROBE, ERR, "Hardware Error\n");
681         e1000_update_mng_vlan(adapter);
682         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
683         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
684
685         e1000_reset_adaptive(&adapter->hw);
686         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
687
688         if (!adapter->smart_power_down &&
689             (adapter->hw.mac_type == e1000_82571 ||
690              adapter->hw.mac_type == e1000_82572)) {
691                 uint16_t phy_data = 0;
692                 /* speed up time to link by disabling smart power down, ignore
693                  * the return value of this function because there is nothing
694                  * different we would do if it failed */
695                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
696                                    &phy_data);
697                 phy_data &= ~IGP02E1000_PM_SPD;
698                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
699                                     phy_data);
700         }
701
702         if ((adapter->en_mng_pt) && (adapter->hw.mac_type < e1000_82571)) {
703                 manc = E1000_READ_REG(&adapter->hw, MANC);
704                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
705                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
706         }
707 }
708
709 /**
710  * e1000_probe - Device Initialization Routine
711  * @pdev: PCI device information struct
712  * @ent: entry in e1000_pci_tbl
713  *
714  * Returns 0 on success, negative on failure
715  *
716  * e1000_probe initializes an adapter identified by a pci_dev structure.
717  * The OS initialization, configuring of the adapter private structure,
718  * and a hardware reset occur.
719  **/
720
721 static int __devinit
722 e1000_probe(struct pci_dev *pdev,
723             const struct pci_device_id *ent)
724 {
725         struct net_device *netdev;
726         struct e1000_adapter *adapter;
727         unsigned long mmio_start, mmio_len;
728         unsigned long flash_start, flash_len;
729
730         static int cards_found = 0;
731         static int global_quad_port_a = 0; /* global ksp3 port a indication */
732         int i, err, pci_using_dac;
733         uint16_t eeprom_data = 0;
734         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
735         if ((err = pci_enable_device(pdev)))
736                 return err;
737
738         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
739             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
740                 pci_using_dac = 1;
741         } else {
742                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
743                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
744                         E1000_ERR("No usable DMA configuration, aborting\n");
745                         goto err_dma;
746                 }
747                 pci_using_dac = 0;
748         }
749
750         if ((err = pci_request_regions(pdev, e1000_driver_name)))
751                 goto err_pci_reg;
752
753         pci_set_master(pdev);
754
755         err = -ENOMEM;
756         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
757         if (!netdev)
758                 goto err_alloc_etherdev;
759
760         SET_MODULE_OWNER(netdev);
761         SET_NETDEV_DEV(netdev, &pdev->dev);
762
763         pci_set_drvdata(pdev, netdev);
764         adapter = netdev_priv(netdev);
765         adapter->netdev = netdev;
766         adapter->pdev = pdev;
767         adapter->hw.back = adapter;
768         adapter->msg_enable = (1 << debug) - 1;
769
770         mmio_start = pci_resource_start(pdev, BAR_0);
771         mmio_len = pci_resource_len(pdev, BAR_0);
772
773         err = -EIO;
774         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
775         if (!adapter->hw.hw_addr)
776                 goto err_ioremap;
777
778         for (i = BAR_1; i <= BAR_5; i++) {
779                 if (pci_resource_len(pdev, i) == 0)
780                         continue;
781                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
782                         adapter->hw.io_base = pci_resource_start(pdev, i);
783                         break;
784                 }
785         }
786
787         netdev->open = &e1000_open;
788         netdev->stop = &e1000_close;
789         netdev->hard_start_xmit = &e1000_xmit_frame;
790         netdev->get_stats = &e1000_get_stats;
791         netdev->set_multicast_list = &e1000_set_multi;
792         netdev->set_mac_address = &e1000_set_mac;
793         netdev->change_mtu = &e1000_change_mtu;
794         netdev->do_ioctl = &e1000_ioctl;
795         e1000_set_ethtool_ops(netdev);
796         netdev->tx_timeout = &e1000_tx_timeout;
797         netdev->watchdog_timeo = 5 * HZ;
798 #ifdef CONFIG_E1000_NAPI
799         netdev->poll = &e1000_clean;
800         netdev->weight = 64;
801 #endif
802         netdev->vlan_rx_register = e1000_vlan_rx_register;
803         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
804         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
805 #ifdef CONFIG_NET_POLL_CONTROLLER
806         netdev->poll_controller = e1000_netpoll;
807 #endif
808         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
809
810         netdev->mem_start = mmio_start;
811         netdev->mem_end = mmio_start + mmio_len;
812         netdev->base_addr = adapter->hw.io_base;
813
814         adapter->bd_number = cards_found;
815
816         /* setup the private structure */
817
818         if ((err = e1000_sw_init(adapter)))
819                 goto err_sw_init;
820
821         err = -EIO;
822         /* Flash BAR mapping must happen after e1000_sw_init
823          * because it depends on mac_type */
824         if ((adapter->hw.mac_type == e1000_ich8lan) &&
825            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
826                 flash_start = pci_resource_start(pdev, 1);
827                 flash_len = pci_resource_len(pdev, 1);
828                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
829                 if (!adapter->hw.flash_address)
830                         goto err_flashmap;
831         }
832
833         if (e1000_check_phy_reset_block(&adapter->hw))
834                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
835
836         if (adapter->hw.mac_type >= e1000_82543) {
837                 netdev->features = NETIF_F_SG |
838                                    NETIF_F_HW_CSUM |
839                                    NETIF_F_HW_VLAN_TX |
840                                    NETIF_F_HW_VLAN_RX |
841                                    NETIF_F_HW_VLAN_FILTER;
842                 if (adapter->hw.mac_type == e1000_ich8lan)
843                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
844         }
845
846 #ifdef NETIF_F_TSO
847         if ((adapter->hw.mac_type >= e1000_82544) &&
848            (adapter->hw.mac_type != e1000_82547))
849                 netdev->features |= NETIF_F_TSO;
850
851 #ifdef NETIF_F_TSO_IPV6
852         if (adapter->hw.mac_type > e1000_82547_rev_2)
853                 netdev->features |= NETIF_F_TSO_IPV6;
854 #endif
855 #endif
856         if (pci_using_dac)
857                 netdev->features |= NETIF_F_HIGHDMA;
858
859         netdev->features |= NETIF_F_LLTX;
860
861         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
862
863         /* initialize eeprom parameters */
864
865         if (e1000_init_eeprom_params(&adapter->hw)) {
866                 E1000_ERR("EEPROM initialization failed\n");
867                 goto err_eeprom;
868         }
869
870         /* before reading the EEPROM, reset the controller to
871          * put the device in a known good starting state */
872
873         e1000_reset_hw(&adapter->hw);
874
875         /* make sure the EEPROM is good */
876
877         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
878                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
879                 goto err_eeprom;
880         }
881
882         /* copy the MAC address out of the EEPROM */
883
884         if (e1000_read_mac_addr(&adapter->hw))
885                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
886         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
887         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
888
889         if (!is_valid_ether_addr(netdev->perm_addr)) {
890                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
891                 goto err_eeprom;
892         }
893
894         e1000_get_bus_info(&adapter->hw);
895
896         init_timer(&adapter->tx_fifo_stall_timer);
897         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
898         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
899
900         init_timer(&adapter->watchdog_timer);
901         adapter->watchdog_timer.function = &e1000_watchdog;
902         adapter->watchdog_timer.data = (unsigned long) adapter;
903
904         init_timer(&adapter->phy_info_timer);
905         adapter->phy_info_timer.function = &e1000_update_phy_info;
906         adapter->phy_info_timer.data = (unsigned long) adapter;
907
908         INIT_WORK(&adapter->reset_task,
909                 (void (*)(void *))e1000_reset_task, netdev);
910
911         e1000_check_options(adapter);
912
913         /* Initial Wake on LAN setting
914          * If APM wake is enabled in the EEPROM,
915          * enable the ACPI Magic Packet filter
916          */
917
918         switch (adapter->hw.mac_type) {
919         case e1000_82542_rev2_0:
920         case e1000_82542_rev2_1:
921         case e1000_82543:
922                 break;
923         case e1000_82544:
924                 e1000_read_eeprom(&adapter->hw,
925                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
926                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
927                 break;
928         case e1000_ich8lan:
929                 e1000_read_eeprom(&adapter->hw,
930                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
931                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
932                 break;
933         case e1000_82546:
934         case e1000_82546_rev_3:
935         case e1000_82571:
936         case e1000_80003es2lan:
937                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
938                         e1000_read_eeprom(&adapter->hw,
939                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
940                         break;
941                 }
942                 /* Fall Through */
943         default:
944                 e1000_read_eeprom(&adapter->hw,
945                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
946                 break;
947         }
948         if (eeprom_data & eeprom_apme_mask)
949                 adapter->eeprom_wol |= E1000_WUFC_MAG;
950
951         /* now that we have the eeprom settings, apply the special cases
952          * where the eeprom may be wrong or the board simply won't support
953          * wake on lan on a particular port */
954         switch (pdev->device) {
955         case E1000_DEV_ID_82546GB_PCIE:
956                 adapter->eeprom_wol = 0;
957                 break;
958         case E1000_DEV_ID_82546EB_FIBER:
959         case E1000_DEV_ID_82546GB_FIBER:
960         case E1000_DEV_ID_82571EB_FIBER:
961                 /* Wake events only supported on port A for dual fiber
962                  * regardless of eeprom setting */
963                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
964                         adapter->eeprom_wol = 0;
965                 break;
966         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
967         case E1000_DEV_ID_82571EB_QUAD_COPPER:
968                 /* if quad port adapter, disable WoL on all but port A */
969                 if (global_quad_port_a != 0)
970                         adapter->eeprom_wol = 0;
971                 else
972                         adapter->quad_port_a = 1;
973                 /* Reset for multiple quad port adapters */
974                 if (++global_quad_port_a == 4)
975                         global_quad_port_a = 0;
976                 break;
977         }
978
979         /* initialize the wol settings based on the eeprom settings */
980         adapter->wol = adapter->eeprom_wol;
981
982         /* print bus type/speed/width info */
983         {
984         struct e1000_hw *hw = &adapter->hw;
985         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
986                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
987                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
988                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
989                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
990                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
991                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
992                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
993                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
994                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
995                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
996                  "32-bit"));
997         }
998
999         for (i = 0; i < 6; i++)
1000                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
1001
1002         /* reset the hardware with the new settings */
1003         e1000_reset(adapter);
1004
1005         /* If the controller is 82573 and f/w is AMT, do not set
1006          * DRV_LOAD until the interface is up.  For all other cases,
1007          * let the f/w know that the h/w is now under the control
1008          * of the driver. */
1009         if (adapter->hw.mac_type != e1000_82573 ||
1010             !e1000_check_mng_mode(&adapter->hw))
1011                 e1000_get_hw_control(adapter);
1012
1013         strcpy(netdev->name, "eth%d");
1014         if ((err = register_netdev(netdev)))
1015                 goto err_register;
1016
1017         /* tell the stack to leave us alone until e1000_open() is called */
1018         netif_carrier_off(netdev);
1019         netif_stop_queue(netdev);
1020
1021         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1022
1023         cards_found++;
1024         return 0;
1025
1026 err_register:
1027         e1000_release_hw_control(adapter);
1028 err_eeprom:
1029         if (!e1000_check_phy_reset_block(&adapter->hw))
1030                 e1000_phy_hw_reset(&adapter->hw);
1031
1032         if (adapter->hw.flash_address)
1033                 iounmap(adapter->hw.flash_address);
1034 err_flashmap:
1035 #ifdef CONFIG_E1000_NAPI
1036         for (i = 0; i < adapter->num_rx_queues; i++)
1037                 dev_put(&adapter->polling_netdev[i]);
1038 #endif
1039
1040         kfree(adapter->tx_ring);
1041         kfree(adapter->rx_ring);
1042 #ifdef CONFIG_E1000_NAPI
1043         kfree(adapter->polling_netdev);
1044 #endif
1045 err_sw_init:
1046         iounmap(adapter->hw.hw_addr);
1047 err_ioremap:
1048         free_netdev(netdev);
1049 err_alloc_etherdev:
1050         pci_release_regions(pdev);
1051 err_pci_reg:
1052 err_dma:
1053         pci_disable_device(pdev);
1054         return err;
1055 }
1056
1057 /**
1058  * e1000_remove - Device Removal Routine
1059  * @pdev: PCI device information struct
1060  *
1061  * e1000_remove is called by the PCI subsystem to alert the driver
1062  * that it should release a PCI device.  The could be caused by a
1063  * Hot-Plug event, or because the driver is going to be removed from
1064  * memory.
1065  **/
1066
1067 static void __devexit
1068 e1000_remove(struct pci_dev *pdev)
1069 {
1070         struct net_device *netdev = pci_get_drvdata(pdev);
1071         struct e1000_adapter *adapter = netdev_priv(netdev);
1072         uint32_t manc;
1073 #ifdef CONFIG_E1000_NAPI
1074         int i;
1075 #endif
1076
1077         flush_scheduled_work();
1078
1079         if (adapter->hw.mac_type < e1000_82571 &&
1080            adapter->hw.media_type == e1000_media_type_copper) {
1081                 manc = E1000_READ_REG(&adapter->hw, MANC);
1082                 if (manc & E1000_MANC_SMBUS_EN) {
1083                         manc |= E1000_MANC_ARP_EN;
1084                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
1085                 }
1086         }
1087
1088         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1089          * would have already happened in close and is redundant. */
1090         e1000_release_hw_control(adapter);
1091
1092         unregister_netdev(netdev);
1093 #ifdef CONFIG_E1000_NAPI
1094         for (i = 0; i < adapter->num_rx_queues; i++)
1095                 dev_put(&adapter->polling_netdev[i]);
1096 #endif
1097
1098         if (!e1000_check_phy_reset_block(&adapter->hw))
1099                 e1000_phy_hw_reset(&adapter->hw);
1100
1101         kfree(adapter->tx_ring);
1102         kfree(adapter->rx_ring);
1103 #ifdef CONFIG_E1000_NAPI
1104         kfree(adapter->polling_netdev);
1105 #endif
1106
1107         iounmap(adapter->hw.hw_addr);
1108         if (adapter->hw.flash_address)
1109                 iounmap(adapter->hw.flash_address);
1110         pci_release_regions(pdev);
1111
1112         free_netdev(netdev);
1113
1114         pci_disable_device(pdev);
1115 }
1116
1117 /**
1118  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1119  * @adapter: board private structure to initialize
1120  *
1121  * e1000_sw_init initializes the Adapter private data structure.
1122  * Fields are initialized based on PCI device information and
1123  * OS network device settings (MTU size).
1124  **/
1125
1126 static int __devinit
1127 e1000_sw_init(struct e1000_adapter *adapter)
1128 {
1129         struct e1000_hw *hw = &adapter->hw;
1130         struct net_device *netdev = adapter->netdev;
1131         struct pci_dev *pdev = adapter->pdev;
1132 #ifdef CONFIG_E1000_NAPI
1133         int i;
1134 #endif
1135
1136         /* PCI config space info */
1137
1138         hw->vendor_id = pdev->vendor;
1139         hw->device_id = pdev->device;
1140         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1141         hw->subsystem_id = pdev->subsystem_device;
1142
1143         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1144
1145         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1146
1147         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1148         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1149         hw->max_frame_size = netdev->mtu +
1150                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1151         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1152
1153         /* identify the MAC */
1154
1155         if (e1000_set_mac_type(hw)) {
1156                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1157                 return -EIO;
1158         }
1159
1160         switch (hw->mac_type) {
1161         default:
1162                 break;
1163         case e1000_82541:
1164         case e1000_82547:
1165         case e1000_82541_rev_2:
1166         case e1000_82547_rev_2:
1167                 hw->phy_init_script = 1;
1168                 break;
1169         }
1170
1171         e1000_set_media_type(hw);
1172
1173         hw->wait_autoneg_complete = FALSE;
1174         hw->tbi_compatibility_en = TRUE;
1175         hw->adaptive_ifs = TRUE;
1176
1177         /* Copper options */
1178
1179         if (hw->media_type == e1000_media_type_copper) {
1180                 hw->mdix = AUTO_ALL_MODES;
1181                 hw->disable_polarity_correction = FALSE;
1182                 hw->master_slave = E1000_MASTER_SLAVE;
1183         }
1184
1185         adapter->num_tx_queues = 1;
1186         adapter->num_rx_queues = 1;
1187
1188         if (e1000_alloc_queues(adapter)) {
1189                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1190                 return -ENOMEM;
1191         }
1192
1193 #ifdef CONFIG_E1000_NAPI
1194         for (i = 0; i < adapter->num_rx_queues; i++) {
1195                 adapter->polling_netdev[i].priv = adapter;
1196                 adapter->polling_netdev[i].poll = &e1000_clean;
1197                 adapter->polling_netdev[i].weight = 64;
1198                 dev_hold(&adapter->polling_netdev[i]);
1199                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1200         }
1201         spin_lock_init(&adapter->tx_queue_lock);
1202 #endif
1203
1204         atomic_set(&adapter->irq_sem, 1);
1205         spin_lock_init(&adapter->stats_lock);
1206
1207         set_bit(__E1000_DOWN, &adapter->flags);
1208
1209         return 0;
1210 }
1211
1212 /**
1213  * e1000_alloc_queues - Allocate memory for all rings
1214  * @adapter: board private structure to initialize
1215  *
1216  * We allocate one ring per queue at run-time since we don't know the
1217  * number of queues at compile-time.  The polling_netdev array is
1218  * intended for Multiqueue, but should work fine with a single queue.
1219  **/
1220
1221 static int __devinit
1222 e1000_alloc_queues(struct e1000_adapter *adapter)
1223 {
1224         int size;
1225
1226         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1227         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1228         if (!adapter->tx_ring)
1229                 return -ENOMEM;
1230         memset(adapter->tx_ring, 0, size);
1231
1232         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1233         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1234         if (!adapter->rx_ring) {
1235                 kfree(adapter->tx_ring);
1236                 return -ENOMEM;
1237         }
1238         memset(adapter->rx_ring, 0, size);
1239
1240 #ifdef CONFIG_E1000_NAPI
1241         size = sizeof(struct net_device) * adapter->num_rx_queues;
1242         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1243         if (!adapter->polling_netdev) {
1244                 kfree(adapter->tx_ring);
1245                 kfree(adapter->rx_ring);
1246                 return -ENOMEM;
1247         }
1248         memset(adapter->polling_netdev, 0, size);
1249 #endif
1250
1251         return E1000_SUCCESS;
1252 }
1253
1254 /**
1255  * e1000_open - Called when a network interface is made active
1256  * @netdev: network interface device structure
1257  *
1258  * Returns 0 on success, negative value on failure
1259  *
1260  * The open entry point is called when a network interface is made
1261  * active by the system (IFF_UP).  At this point all resources needed
1262  * for transmit and receive operations are allocated, the interrupt
1263  * handler is registered with the OS, the watchdog timer is started,
1264  * and the stack is notified that the interface is ready.
1265  **/
1266
1267 static int
1268 e1000_open(struct net_device *netdev)
1269 {
1270         struct e1000_adapter *adapter = netdev_priv(netdev);
1271         int err;
1272
1273         /* disallow open during test */
1274         if (test_bit(__E1000_TESTING, &adapter->flags))
1275                 return -EBUSY;
1276
1277         /* allocate transmit descriptors */
1278
1279         if ((err = e1000_setup_all_tx_resources(adapter)))
1280                 goto err_setup_tx;
1281
1282         /* allocate receive descriptors */
1283
1284         if ((err = e1000_setup_all_rx_resources(adapter)))
1285                 goto err_setup_rx;
1286
1287         err = e1000_request_irq(adapter);
1288         if (err)
1289                 goto err_req_irq;
1290
1291         e1000_power_up_phy(adapter);
1292
1293         if ((err = e1000_up(adapter)))
1294                 goto err_up;
1295         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1296         if ((adapter->hw.mng_cookie.status &
1297                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1298                 e1000_update_mng_vlan(adapter);
1299         }
1300
1301         /* If AMT is enabled, let the firmware know that the network
1302          * interface is now open */
1303         if (adapter->hw.mac_type == e1000_82573 &&
1304             e1000_check_mng_mode(&adapter->hw))
1305                 e1000_get_hw_control(adapter);
1306
1307         return E1000_SUCCESS;
1308
1309 err_up:
1310         e1000_power_down_phy(adapter);
1311         e1000_free_irq(adapter);
1312 err_req_irq:
1313         e1000_free_all_rx_resources(adapter);
1314 err_setup_rx:
1315         e1000_free_all_tx_resources(adapter);
1316 err_setup_tx:
1317         e1000_reset(adapter);
1318
1319         return err;
1320 }
1321
1322 /**
1323  * e1000_close - Disables a network interface
1324  * @netdev: network interface device structure
1325  *
1326  * Returns 0, this is not allowed to fail
1327  *
1328  * The close entry point is called when an interface is de-activated
1329  * by the OS.  The hardware is still under the drivers control, but
1330  * needs to be disabled.  A global MAC reset is issued to stop the
1331  * hardware, and all transmit and receive resources are freed.
1332  **/
1333
1334 static int
1335 e1000_close(struct net_device *netdev)
1336 {
1337         struct e1000_adapter *adapter = netdev_priv(netdev);
1338
1339         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1340         e1000_down(adapter);
1341         e1000_power_down_phy(adapter);
1342         e1000_free_irq(adapter);
1343
1344         e1000_free_all_tx_resources(adapter);
1345         e1000_free_all_rx_resources(adapter);
1346
1347         /* kill manageability vlan ID if supported, but not if a vlan with
1348          * the same ID is registered on the host OS (let 8021q kill it) */
1349         if ((adapter->hw.mng_cookie.status &
1350                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1351              !(adapter->vlgrp &&
1352                           adapter->vlgrp->vlan_devices[adapter->mng_vlan_id])) {
1353                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1354         }
1355
1356         /* If AMT is enabled, let the firmware know that the network
1357          * interface is now closed */
1358         if (adapter->hw.mac_type == e1000_82573 &&
1359             e1000_check_mng_mode(&adapter->hw))
1360                 e1000_release_hw_control(adapter);
1361
1362         return 0;
1363 }
1364
1365 /**
1366  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1367  * @adapter: address of board private structure
1368  * @start: address of beginning of memory
1369  * @len: length of memory
1370  **/
1371 static boolean_t
1372 e1000_check_64k_bound(struct e1000_adapter *adapter,
1373                       void *start, unsigned long len)
1374 {
1375         unsigned long begin = (unsigned long) start;
1376         unsigned long end = begin + len;
1377
1378         /* First rev 82545 and 82546 need to not allow any memory
1379          * write location to cross 64k boundary due to errata 23 */
1380         if (adapter->hw.mac_type == e1000_82545 ||
1381             adapter->hw.mac_type == e1000_82546) {
1382                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1383         }
1384
1385         return TRUE;
1386 }
1387
1388 /**
1389  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1390  * @adapter: board private structure
1391  * @txdr:    tx descriptor ring (for a specific queue) to setup
1392  *
1393  * Return 0 on success, negative on failure
1394  **/
1395
1396 static int
1397 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1398                          struct e1000_tx_ring *txdr)
1399 {
1400         struct pci_dev *pdev = adapter->pdev;
1401         int size;
1402
1403         size = sizeof(struct e1000_buffer) * txdr->count;
1404         txdr->buffer_info = vmalloc(size);
1405         if (!txdr->buffer_info) {
1406                 DPRINTK(PROBE, ERR,
1407                 "Unable to allocate memory for the transmit descriptor ring\n");
1408                 return -ENOMEM;
1409         }
1410         memset(txdr->buffer_info, 0, size);
1411
1412         /* round up to nearest 4K */
1413
1414         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1415         E1000_ROUNDUP(txdr->size, 4096);
1416
1417         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1418         if (!txdr->desc) {
1419 setup_tx_desc_die:
1420                 vfree(txdr->buffer_info);
1421                 DPRINTK(PROBE, ERR,
1422                 "Unable to allocate memory for the transmit descriptor ring\n");
1423                 return -ENOMEM;
1424         }
1425
1426         /* Fix for errata 23, can't cross 64kB boundary */
1427         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1428                 void *olddesc = txdr->desc;
1429                 dma_addr_t olddma = txdr->dma;
1430                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1431                                      "at %p\n", txdr->size, txdr->desc);
1432                 /* Try again, without freeing the previous */
1433                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1434                 /* Failed allocation, critical failure */
1435                 if (!txdr->desc) {
1436                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1437                         goto setup_tx_desc_die;
1438                 }
1439
1440                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1441                         /* give up */
1442                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1443                                             txdr->dma);
1444                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1445                         DPRINTK(PROBE, ERR,
1446                                 "Unable to allocate aligned memory "
1447                                 "for the transmit descriptor ring\n");
1448                         vfree(txdr->buffer_info);
1449                         return -ENOMEM;
1450                 } else {
1451                         /* Free old allocation, new allocation was successful */
1452                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1453                 }
1454         }
1455         memset(txdr->desc, 0, txdr->size);
1456
1457         txdr->next_to_use = 0;
1458         txdr->next_to_clean = 0;
1459         spin_lock_init(&txdr->tx_lock);
1460
1461         return 0;
1462 }
1463
1464 /**
1465  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1466  *                                (Descriptors) for all queues
1467  * @adapter: board private structure
1468  *
1469  * Return 0 on success, negative on failure
1470  **/
1471
1472 int
1473 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1474 {
1475         int i, err = 0;
1476
1477         for (i = 0; i < adapter->num_tx_queues; i++) {
1478                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1479                 if (err) {
1480                         DPRINTK(PROBE, ERR,
1481                                 "Allocation for Tx Queue %u failed\n", i);
1482                         for (i-- ; i >= 0; i--)
1483                                 e1000_free_tx_resources(adapter,
1484                                                         &adapter->tx_ring[i]);
1485                         break;
1486                 }
1487         }
1488
1489         return err;
1490 }
1491
1492 /**
1493  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1494  * @adapter: board private structure
1495  *
1496  * Configure the Tx unit of the MAC after a reset.
1497  **/
1498
1499 static void
1500 e1000_configure_tx(struct e1000_adapter *adapter)
1501 {
1502         uint64_t tdba;
1503         struct e1000_hw *hw = &adapter->hw;
1504         uint32_t tdlen, tctl, tipg, tarc;
1505         uint32_t ipgr1, ipgr2;
1506
1507         /* Setup the HW Tx Head and Tail descriptor pointers */
1508
1509         switch (adapter->num_tx_queues) {
1510         case 1:
1511         default:
1512                 tdba = adapter->tx_ring[0].dma;
1513                 tdlen = adapter->tx_ring[0].count *
1514                         sizeof(struct e1000_tx_desc);
1515                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1516                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1517                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1518                 E1000_WRITE_REG(hw, TDT, 0);
1519                 E1000_WRITE_REG(hw, TDH, 0);
1520                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1521                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1522                 break;
1523         }
1524
1525         /* Set the default values for the Tx Inter Packet Gap timer */
1526
1527         if (hw->media_type == e1000_media_type_fiber ||
1528             hw->media_type == e1000_media_type_internal_serdes)
1529                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1530         else
1531                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1532
1533         switch (hw->mac_type) {
1534         case e1000_82542_rev2_0:
1535         case e1000_82542_rev2_1:
1536                 tipg = DEFAULT_82542_TIPG_IPGT;
1537                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1538                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1539                 break;
1540         case e1000_80003es2lan:
1541                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1542                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1543                 break;
1544         default:
1545                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1546                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1547                 break;
1548         }
1549         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1550         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1551         E1000_WRITE_REG(hw, TIPG, tipg);
1552
1553         /* Set the Tx Interrupt Delay register */
1554
1555         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1556         if (hw->mac_type >= e1000_82540)
1557                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1558
1559         /* Program the Transmit Control Register */
1560
1561         tctl = E1000_READ_REG(hw, TCTL);
1562         tctl &= ~E1000_TCTL_CT;
1563         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1564                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1565
1566         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1567                 tarc = E1000_READ_REG(hw, TARC0);
1568                 tarc |= (1 << 21);
1569                 E1000_WRITE_REG(hw, TARC0, tarc);
1570         } else if (hw->mac_type == e1000_80003es2lan) {
1571                 tarc = E1000_READ_REG(hw, TARC0);
1572                 tarc |= 1;
1573                 E1000_WRITE_REG(hw, TARC0, tarc);
1574                 tarc = E1000_READ_REG(hw, TARC1);
1575                 tarc |= 1;
1576                 E1000_WRITE_REG(hw, TARC1, tarc);
1577         }
1578
1579         e1000_config_collision_dist(hw);
1580
1581         /* Setup Transmit Descriptor Settings for eop descriptor */
1582         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1583                 E1000_TXD_CMD_IFCS;
1584
1585         if (hw->mac_type < e1000_82543)
1586                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1587         else
1588                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1589
1590         /* Cache if we're 82544 running in PCI-X because we'll
1591          * need this to apply a workaround later in the send path. */
1592         if (hw->mac_type == e1000_82544 &&
1593             hw->bus_type == e1000_bus_type_pcix)
1594                 adapter->pcix_82544 = 1;
1595
1596         E1000_WRITE_REG(hw, TCTL, tctl);
1597
1598 }
1599
1600 /**
1601  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1602  * @adapter: board private structure
1603  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1604  *
1605  * Returns 0 on success, negative on failure
1606  **/
1607
1608 static int
1609 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1610                          struct e1000_rx_ring *rxdr)
1611 {
1612         struct pci_dev *pdev = adapter->pdev;
1613         int size, desc_len;
1614
1615         size = sizeof(struct e1000_buffer) * rxdr->count;
1616         rxdr->buffer_info = vmalloc(size);
1617         if (!rxdr->buffer_info) {
1618                 DPRINTK(PROBE, ERR,
1619                 "Unable to allocate memory for the receive descriptor ring\n");
1620                 return -ENOMEM;
1621         }
1622         memset(rxdr->buffer_info, 0, size);
1623
1624         size = sizeof(struct e1000_ps_page) * rxdr->count;
1625         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1626         if (!rxdr->ps_page) {
1627                 vfree(rxdr->buffer_info);
1628                 DPRINTK(PROBE, ERR,
1629                 "Unable to allocate memory for the receive descriptor ring\n");
1630                 return -ENOMEM;
1631         }
1632         memset(rxdr->ps_page, 0, size);
1633
1634         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1635         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1636         if (!rxdr->ps_page_dma) {
1637                 vfree(rxdr->buffer_info);
1638                 kfree(rxdr->ps_page);
1639                 DPRINTK(PROBE, ERR,
1640                 "Unable to allocate memory for the receive descriptor ring\n");
1641                 return -ENOMEM;
1642         }
1643         memset(rxdr->ps_page_dma, 0, size);
1644
1645         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1646                 desc_len = sizeof(struct e1000_rx_desc);
1647         else
1648                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1649
1650         /* Round up to nearest 4K */
1651
1652         rxdr->size = rxdr->count * desc_len;
1653         E1000_ROUNDUP(rxdr->size, 4096);
1654
1655         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1656
1657         if (!rxdr->desc) {
1658                 DPRINTK(PROBE, ERR,
1659                 "Unable to allocate memory for the receive descriptor ring\n");
1660 setup_rx_desc_die:
1661                 vfree(rxdr->buffer_info);
1662                 kfree(rxdr->ps_page);
1663                 kfree(rxdr->ps_page_dma);
1664                 return -ENOMEM;
1665         }
1666
1667         /* Fix for errata 23, can't cross 64kB boundary */
1668         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1669                 void *olddesc = rxdr->desc;
1670                 dma_addr_t olddma = rxdr->dma;
1671                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1672                                      "at %p\n", rxdr->size, rxdr->desc);
1673                 /* Try again, without freeing the previous */
1674                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1675                 /* Failed allocation, critical failure */
1676                 if (!rxdr->desc) {
1677                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1678                         DPRINTK(PROBE, ERR,
1679                                 "Unable to allocate memory "
1680                                 "for the receive descriptor ring\n");
1681                         goto setup_rx_desc_die;
1682                 }
1683
1684                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1685                         /* give up */
1686                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1687                                             rxdr->dma);
1688                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1689                         DPRINTK(PROBE, ERR,
1690                                 "Unable to allocate aligned memory "
1691                                 "for the receive descriptor ring\n");
1692                         goto setup_rx_desc_die;
1693                 } else {
1694                         /* Free old allocation, new allocation was successful */
1695                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1696                 }
1697         }
1698         memset(rxdr->desc, 0, rxdr->size);
1699
1700         rxdr->next_to_clean = 0;
1701         rxdr->next_to_use = 0;
1702
1703         return 0;
1704 }
1705
1706 /**
1707  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1708  *                                (Descriptors) for all queues
1709  * @adapter: board private structure
1710  *
1711  * Return 0 on success, negative on failure
1712  **/
1713
1714 int
1715 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1716 {
1717         int i, err = 0;
1718
1719         for (i = 0; i < adapter->num_rx_queues; i++) {
1720                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1721                 if (err) {
1722                         DPRINTK(PROBE, ERR,
1723                                 "Allocation for Rx Queue %u failed\n", i);
1724                         for (i-- ; i >= 0; i--)
1725                                 e1000_free_rx_resources(adapter,
1726                                                         &adapter->rx_ring[i]);
1727                         break;
1728                 }
1729         }
1730
1731         return err;
1732 }
1733
1734 /**
1735  * e1000_setup_rctl - configure the receive control registers
1736  * @adapter: Board private structure
1737  **/
1738 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1739                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1740 static void
1741 e1000_setup_rctl(struct e1000_adapter *adapter)
1742 {
1743         uint32_t rctl, rfctl;
1744         uint32_t psrctl = 0;
1745 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1746         uint32_t pages = 0;
1747 #endif
1748
1749         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1750
1751         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1752
1753         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1754                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1755                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1756
1757         if (adapter->hw.tbi_compatibility_on == 1)
1758                 rctl |= E1000_RCTL_SBP;
1759         else
1760                 rctl &= ~E1000_RCTL_SBP;
1761
1762         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1763                 rctl &= ~E1000_RCTL_LPE;
1764         else
1765                 rctl |= E1000_RCTL_LPE;
1766
1767         /* Setup buffer sizes */
1768         rctl &= ~E1000_RCTL_SZ_4096;
1769         rctl |= E1000_RCTL_BSEX;
1770         switch (adapter->rx_buffer_len) {
1771                 case E1000_RXBUFFER_256:
1772                         rctl |= E1000_RCTL_SZ_256;
1773                         rctl &= ~E1000_RCTL_BSEX;
1774                         break;
1775                 case E1000_RXBUFFER_512:
1776                         rctl |= E1000_RCTL_SZ_512;
1777                         rctl &= ~E1000_RCTL_BSEX;
1778                         break;
1779                 case E1000_RXBUFFER_1024:
1780                         rctl |= E1000_RCTL_SZ_1024;
1781                         rctl &= ~E1000_RCTL_BSEX;
1782                         break;
1783                 case E1000_RXBUFFER_2048:
1784                 default:
1785                         rctl |= E1000_RCTL_SZ_2048;
1786                         rctl &= ~E1000_RCTL_BSEX;
1787                         break;
1788                 case E1000_RXBUFFER_4096:
1789                         rctl |= E1000_RCTL_SZ_4096;
1790                         break;
1791                 case E1000_RXBUFFER_8192:
1792                         rctl |= E1000_RCTL_SZ_8192;
1793                         break;
1794                 case E1000_RXBUFFER_16384:
1795                         rctl |= E1000_RCTL_SZ_16384;
1796                         break;
1797         }
1798
1799 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1800         /* 82571 and greater support packet-split where the protocol
1801          * header is placed in skb->data and the packet data is
1802          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1803          * In the case of a non-split, skb->data is linearly filled,
1804          * followed by the page buffers.  Therefore, skb->data is
1805          * sized to hold the largest protocol header.
1806          */
1807         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1808         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1809             PAGE_SIZE <= 16384)
1810                 adapter->rx_ps_pages = pages;
1811         else
1812                 adapter->rx_ps_pages = 0;
1813 #endif
1814         if (adapter->rx_ps_pages) {
1815                 /* Configure extra packet-split registers */
1816                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1817                 rfctl |= E1000_RFCTL_EXTEN;
1818                 /* disable IPv6 packet split support */
1819                 rfctl |= E1000_RFCTL_IPV6_DIS;
1820                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1821
1822                 rctl |= E1000_RCTL_DTYP_PS;
1823
1824                 psrctl |= adapter->rx_ps_bsize0 >>
1825                         E1000_PSRCTL_BSIZE0_SHIFT;
1826
1827                 switch (adapter->rx_ps_pages) {
1828                 case 3:
1829                         psrctl |= PAGE_SIZE <<
1830                                 E1000_PSRCTL_BSIZE3_SHIFT;
1831                 case 2:
1832                         psrctl |= PAGE_SIZE <<
1833                                 E1000_PSRCTL_BSIZE2_SHIFT;
1834                 case 1:
1835                         psrctl |= PAGE_SIZE >>
1836                                 E1000_PSRCTL_BSIZE1_SHIFT;
1837                         break;
1838                 }
1839
1840                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1841         }
1842
1843         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1844 }
1845
1846 /**
1847  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1848  * @adapter: board private structure
1849  *
1850  * Configure the Rx unit of the MAC after a reset.
1851  **/
1852
1853 static void
1854 e1000_configure_rx(struct e1000_adapter *adapter)
1855 {
1856         uint64_t rdba;
1857         struct e1000_hw *hw = &adapter->hw;
1858         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1859
1860         if (adapter->rx_ps_pages) {
1861                 /* this is a 32 byte descriptor */
1862                 rdlen = adapter->rx_ring[0].count *
1863                         sizeof(union e1000_rx_desc_packet_split);
1864                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1865                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1866         } else {
1867                 rdlen = adapter->rx_ring[0].count *
1868                         sizeof(struct e1000_rx_desc);
1869                 adapter->clean_rx = e1000_clean_rx_irq;
1870                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1871         }
1872
1873         /* disable receives while setting up the descriptors */
1874         rctl = E1000_READ_REG(hw, RCTL);
1875         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1876
1877         /* set the Receive Delay Timer Register */
1878         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1879
1880         if (hw->mac_type >= e1000_82540) {
1881                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1882                 if (adapter->itr > 1)
1883                         E1000_WRITE_REG(hw, ITR,
1884                                 1000000000 / (adapter->itr * 256));
1885         }
1886
1887         if (hw->mac_type >= e1000_82571) {
1888                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1889                 /* Reset delay timers after every interrupt */
1890                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1891 #ifdef CONFIG_E1000_NAPI
1892                 /* Auto-Mask interrupts upon ICR read. */
1893                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1894 #endif
1895                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1896                 E1000_WRITE_REG(hw, IAM, ~0);
1897                 E1000_WRITE_FLUSH(hw);
1898         }
1899
1900         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1901          * the Base and Length of the Rx Descriptor Ring */
1902         switch (adapter->num_rx_queues) {
1903         case 1:
1904         default:
1905                 rdba = adapter->rx_ring[0].dma;
1906                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1907                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1908                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1909                 E1000_WRITE_REG(hw, RDT, 0);
1910                 E1000_WRITE_REG(hw, RDH, 0);
1911                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1912                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1913                 break;
1914         }
1915
1916         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1917         if (hw->mac_type >= e1000_82543) {
1918                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1919                 if (adapter->rx_csum == TRUE) {
1920                         rxcsum |= E1000_RXCSUM_TUOFL;
1921
1922                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1923                          * Must be used in conjunction with packet-split. */
1924                         if ((hw->mac_type >= e1000_82571) &&
1925                             (adapter->rx_ps_pages)) {
1926                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1927                         }
1928                 } else {
1929                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1930                         /* don't need to clear IPPCSE as it defaults to 0 */
1931                 }
1932                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1933         }
1934
1935         /* Enable Receives */
1936         E1000_WRITE_REG(hw, RCTL, rctl);
1937 }
1938
1939 /**
1940  * e1000_free_tx_resources - Free Tx Resources per Queue
1941  * @adapter: board private structure
1942  * @tx_ring: Tx descriptor ring for a specific queue
1943  *
1944  * Free all transmit software resources
1945  **/
1946
1947 static void
1948 e1000_free_tx_resources(struct e1000_adapter *adapter,
1949                         struct e1000_tx_ring *tx_ring)
1950 {
1951         struct pci_dev *pdev = adapter->pdev;
1952
1953         e1000_clean_tx_ring(adapter, tx_ring);
1954
1955         vfree(tx_ring->buffer_info);
1956         tx_ring->buffer_info = NULL;
1957
1958         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1959
1960         tx_ring->desc = NULL;
1961 }
1962
1963 /**
1964  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1965  * @adapter: board private structure
1966  *
1967  * Free all transmit software resources
1968  **/
1969
1970 void
1971 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1972 {
1973         int i;
1974
1975         for (i = 0; i < adapter->num_tx_queues; i++)
1976                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1977 }
1978
1979 static void
1980 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1981                         struct e1000_buffer *buffer_info)
1982 {
1983         if (buffer_info->dma) {
1984                 pci_unmap_page(adapter->pdev,
1985                                 buffer_info->dma,
1986                                 buffer_info->length,
1987                                 PCI_DMA_TODEVICE);
1988         }
1989         if (buffer_info->skb)
1990                 dev_kfree_skb_any(buffer_info->skb);
1991         memset(buffer_info, 0, sizeof(struct e1000_buffer));
1992 }
1993
1994 /**
1995  * e1000_clean_tx_ring - Free Tx Buffers
1996  * @adapter: board private structure
1997  * @tx_ring: ring to be cleaned
1998  **/
1999
2000 static void
2001 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2002                     struct e1000_tx_ring *tx_ring)
2003 {
2004         struct e1000_buffer *buffer_info;
2005         unsigned long size;
2006         unsigned int i;
2007
2008         /* Free all the Tx ring sk_buffs */
2009
2010         for (i = 0; i < tx_ring->count; i++) {
2011                 buffer_info = &tx_ring->buffer_info[i];
2012                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2013         }
2014
2015         size = sizeof(struct e1000_buffer) * tx_ring->count;
2016         memset(tx_ring->buffer_info, 0, size);
2017
2018         /* Zero out the descriptor ring */
2019
2020         memset(tx_ring->desc, 0, tx_ring->size);
2021
2022         tx_ring->next_to_use = 0;
2023         tx_ring->next_to_clean = 0;
2024         tx_ring->last_tx_tso = 0;
2025
2026         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2027         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2028 }
2029
2030 /**
2031  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2032  * @adapter: board private structure
2033  **/
2034
2035 static void
2036 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2037 {
2038         int i;
2039
2040         for (i = 0; i < adapter->num_tx_queues; i++)
2041                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2042 }
2043
2044 /**
2045  * e1000_free_rx_resources - Free Rx Resources
2046  * @adapter: board private structure
2047  * @rx_ring: ring to clean the resources from
2048  *
2049  * Free all receive software resources
2050  **/
2051
2052 static void
2053 e1000_free_rx_resources(struct e1000_adapter *adapter,
2054                         struct e1000_rx_ring *rx_ring)
2055 {
2056         struct pci_dev *pdev = adapter->pdev;
2057
2058         e1000_clean_rx_ring(adapter, rx_ring);
2059
2060         vfree(rx_ring->buffer_info);
2061         rx_ring->buffer_info = NULL;
2062         kfree(rx_ring->ps_page);
2063         rx_ring->ps_page = NULL;
2064         kfree(rx_ring->ps_page_dma);
2065         rx_ring->ps_page_dma = NULL;
2066
2067         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2068
2069         rx_ring->desc = NULL;
2070 }
2071
2072 /**
2073  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2074  * @adapter: board private structure
2075  *
2076  * Free all receive software resources
2077  **/
2078
2079 void
2080 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2081 {
2082         int i;
2083
2084         for (i = 0; i < adapter->num_rx_queues; i++)
2085                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2086 }
2087
2088 /**
2089  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2090  * @adapter: board private structure
2091  * @rx_ring: ring to free buffers from
2092  **/
2093
2094 static void
2095 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2096                     struct e1000_rx_ring *rx_ring)
2097 {
2098         struct e1000_buffer *buffer_info;
2099         struct e1000_ps_page *ps_page;
2100         struct e1000_ps_page_dma *ps_page_dma;
2101         struct pci_dev *pdev = adapter->pdev;
2102         unsigned long size;
2103         unsigned int i, j;
2104
2105         /* Free all the Rx ring sk_buffs */
2106         for (i = 0; i < rx_ring->count; i++) {
2107                 buffer_info = &rx_ring->buffer_info[i];
2108                 if (buffer_info->skb) {
2109                         pci_unmap_single(pdev,
2110                                          buffer_info->dma,
2111                                          buffer_info->length,
2112                                          PCI_DMA_FROMDEVICE);
2113
2114                         dev_kfree_skb(buffer_info->skb);
2115                         buffer_info->skb = NULL;
2116                 }
2117                 ps_page = &rx_ring->ps_page[i];
2118                 ps_page_dma = &rx_ring->ps_page_dma[i];
2119                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2120                         if (!ps_page->ps_page[j]) break;
2121                         pci_unmap_page(pdev,
2122                                        ps_page_dma->ps_page_dma[j],
2123                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2124                         ps_page_dma->ps_page_dma[j] = 0;
2125                         put_page(ps_page->ps_page[j]);
2126                         ps_page->ps_page[j] = NULL;
2127                 }
2128         }
2129
2130         size = sizeof(struct e1000_buffer) * rx_ring->count;
2131         memset(rx_ring->buffer_info, 0, size);
2132         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2133         memset(rx_ring->ps_page, 0, size);
2134         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2135         memset(rx_ring->ps_page_dma, 0, size);
2136
2137         /* Zero out the descriptor ring */
2138
2139         memset(rx_ring->desc, 0, rx_ring->size);
2140
2141         rx_ring->next_to_clean = 0;
2142         rx_ring->next_to_use = 0;
2143
2144         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2145         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2146 }
2147
2148 /**
2149  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2150  * @adapter: board private structure
2151  **/
2152
2153 static void
2154 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2155 {
2156         int i;
2157
2158         for (i = 0; i < adapter->num_rx_queues; i++)
2159                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2160 }
2161
2162 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2163  * and memory write and invalidate disabled for certain operations
2164  */
2165 static void
2166 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2167 {
2168         struct net_device *netdev = adapter->netdev;
2169         uint32_t rctl;
2170
2171         e1000_pci_clear_mwi(&adapter->hw);
2172
2173         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2174         rctl |= E1000_RCTL_RST;
2175         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2176         E1000_WRITE_FLUSH(&adapter->hw);
2177         mdelay(5);
2178
2179         if (netif_running(netdev))
2180                 e1000_clean_all_rx_rings(adapter);
2181 }
2182
2183 static void
2184 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2185 {
2186         struct net_device *netdev = adapter->netdev;
2187         uint32_t rctl;
2188
2189         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2190         rctl &= ~E1000_RCTL_RST;
2191         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2192         E1000_WRITE_FLUSH(&adapter->hw);
2193         mdelay(5);
2194
2195         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2196                 e1000_pci_set_mwi(&adapter->hw);
2197
2198         if (netif_running(netdev)) {
2199                 /* No need to loop, because 82542 supports only 1 queue */
2200                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2201                 e1000_configure_rx(adapter);
2202                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2203         }
2204 }
2205
2206 /**
2207  * e1000_set_mac - Change the Ethernet Address of the NIC
2208  * @netdev: network interface device structure
2209  * @p: pointer to an address structure
2210  *
2211  * Returns 0 on success, negative on failure
2212  **/
2213
2214 static int
2215 e1000_set_mac(struct net_device *netdev, void *p)
2216 {
2217         struct e1000_adapter *adapter = netdev_priv(netdev);
2218         struct sockaddr *addr = p;
2219
2220         if (!is_valid_ether_addr(addr->sa_data))
2221                 return -EADDRNOTAVAIL;
2222
2223         /* 82542 2.0 needs to be in reset to write receive address registers */
2224
2225         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2226                 e1000_enter_82542_rst(adapter);
2227
2228         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2229         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2230
2231         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2232
2233         /* With 82571 controllers, LAA may be overwritten (with the default)
2234          * due to controller reset from the other port. */
2235         if (adapter->hw.mac_type == e1000_82571) {
2236                 /* activate the work around */
2237                 adapter->hw.laa_is_present = 1;
2238
2239                 /* Hold a copy of the LAA in RAR[14] This is done so that
2240                  * between the time RAR[0] gets clobbered  and the time it
2241                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2242                  * of the RARs and no incoming packets directed to this port
2243                  * are dropped. Eventaully the LAA will be in RAR[0] and
2244                  * RAR[14] */
2245                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2246                                         E1000_RAR_ENTRIES - 1);
2247         }
2248
2249         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2250                 e1000_leave_82542_rst(adapter);
2251
2252         return 0;
2253 }
2254
2255 /**
2256  * e1000_set_multi - Multicast and Promiscuous mode set
2257  * @netdev: network interface device structure
2258  *
2259  * The set_multi entry point is called whenever the multicast address
2260  * list or the network interface flags are updated.  This routine is
2261  * responsible for configuring the hardware for proper multicast,
2262  * promiscuous mode, and all-multi behavior.
2263  **/
2264
2265 static void
2266 e1000_set_multi(struct net_device *netdev)
2267 {
2268         struct e1000_adapter *adapter = netdev_priv(netdev);
2269         struct e1000_hw *hw = &adapter->hw;
2270         struct dev_mc_list *mc_ptr;
2271         uint32_t rctl;
2272         uint32_t hash_value;
2273         int i, rar_entries = E1000_RAR_ENTRIES;
2274         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2275                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2276                                 E1000_NUM_MTA_REGISTERS;
2277
2278         if (adapter->hw.mac_type == e1000_ich8lan)
2279                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2280
2281         /* reserve RAR[14] for LAA over-write work-around */
2282         if (adapter->hw.mac_type == e1000_82571)
2283                 rar_entries--;
2284
2285         /* Check for Promiscuous and All Multicast modes */
2286
2287         rctl = E1000_READ_REG(hw, RCTL);
2288
2289         if (netdev->flags & IFF_PROMISC) {
2290                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2291         } else if (netdev->flags & IFF_ALLMULTI) {
2292                 rctl |= E1000_RCTL_MPE;
2293                 rctl &= ~E1000_RCTL_UPE;
2294         } else {
2295                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2296         }
2297
2298         E1000_WRITE_REG(hw, RCTL, rctl);
2299
2300         /* 82542 2.0 needs to be in reset to write receive address registers */
2301
2302         if (hw->mac_type == e1000_82542_rev2_0)
2303                 e1000_enter_82542_rst(adapter);
2304
2305         /* load the first 14 multicast address into the exact filters 1-14
2306          * RAR 0 is used for the station MAC adddress
2307          * if there are not 14 addresses, go ahead and clear the filters
2308          * -- with 82571 controllers only 0-13 entries are filled here
2309          */
2310         mc_ptr = netdev->mc_list;
2311
2312         for (i = 1; i < rar_entries; i++) {
2313                 if (mc_ptr) {
2314                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2315                         mc_ptr = mc_ptr->next;
2316                 } else {
2317                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2318                         E1000_WRITE_FLUSH(hw);
2319                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2320                         E1000_WRITE_FLUSH(hw);
2321                 }
2322         }
2323
2324         /* clear the old settings from the multicast hash table */
2325
2326         for (i = 0; i < mta_reg_count; i++) {
2327                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2328                 E1000_WRITE_FLUSH(hw);
2329         }
2330
2331         /* load any remaining addresses into the hash table */
2332
2333         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2334                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2335                 e1000_mta_set(hw, hash_value);
2336         }
2337
2338         if (hw->mac_type == e1000_82542_rev2_0)
2339                 e1000_leave_82542_rst(adapter);
2340 }
2341
2342 /* Need to wait a few seconds after link up to get diagnostic information from
2343  * the phy */
2344
2345 static void
2346 e1000_update_phy_info(unsigned long data)
2347 {
2348         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2349         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2350 }
2351
2352 /**
2353  * e1000_82547_tx_fifo_stall - Timer Call-back
2354  * @data: pointer to adapter cast into an unsigned long
2355  **/
2356
2357 static void
2358 e1000_82547_tx_fifo_stall(unsigned long data)
2359 {
2360         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2361         struct net_device *netdev = adapter->netdev;
2362         uint32_t tctl;
2363
2364         if (atomic_read(&adapter->tx_fifo_stall)) {
2365                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2366                     E1000_READ_REG(&adapter->hw, TDH)) &&
2367                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2368                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2369                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2370                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2371                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2372                         E1000_WRITE_REG(&adapter->hw, TCTL,
2373                                         tctl & ~E1000_TCTL_EN);
2374                         E1000_WRITE_REG(&adapter->hw, TDFT,
2375                                         adapter->tx_head_addr);
2376                         E1000_WRITE_REG(&adapter->hw, TDFH,
2377                                         adapter->tx_head_addr);
2378                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2379                                         adapter->tx_head_addr);
2380                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2381                                         adapter->tx_head_addr);
2382                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2383                         E1000_WRITE_FLUSH(&adapter->hw);
2384
2385                         adapter->tx_fifo_head = 0;
2386                         atomic_set(&adapter->tx_fifo_stall, 0);
2387                         netif_wake_queue(netdev);
2388                 } else {
2389                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2390                 }
2391         }
2392 }
2393
2394 /**
2395  * e1000_watchdog - Timer Call-back
2396  * @data: pointer to adapter cast into an unsigned long
2397  **/
2398 static void
2399 e1000_watchdog(unsigned long data)
2400 {
2401         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2402         struct net_device *netdev = adapter->netdev;
2403         struct e1000_tx_ring *txdr = adapter->tx_ring;
2404         uint32_t link, tctl;
2405         int32_t ret_val;
2406
2407         ret_val = e1000_check_for_link(&adapter->hw);
2408         if ((ret_val == E1000_ERR_PHY) &&
2409             (adapter->hw.phy_type == e1000_phy_igp_3) &&
2410             (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2411                 /* See e1000_kumeran_lock_loss_workaround() */
2412                 DPRINTK(LINK, INFO,
2413                         "Gigabit has been disabled, downgrading speed\n");
2414         }
2415         if (adapter->hw.mac_type == e1000_82573) {
2416                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2417                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2418                         e1000_update_mng_vlan(adapter);
2419         }
2420
2421         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2422            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2423                 link = !adapter->hw.serdes_link_down;
2424         else
2425                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2426
2427         if (link) {
2428                 if (!netif_carrier_ok(netdev)) {
2429                         boolean_t txb2b = 1;
2430                         e1000_get_speed_and_duplex(&adapter->hw,
2431                                                    &adapter->link_speed,
2432                                                    &adapter->link_duplex);
2433
2434                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2435                                adapter->link_speed,
2436                                adapter->link_duplex == FULL_DUPLEX ?
2437                                "Full Duplex" : "Half Duplex");
2438
2439                         /* tweak tx_queue_len according to speed/duplex
2440                          * and adjust the timeout factor */
2441                         netdev->tx_queue_len = adapter->tx_queue_len;
2442                         adapter->tx_timeout_factor = 1;
2443                         switch (adapter->link_speed) {
2444                         case SPEED_10:
2445                                 txb2b = 0;
2446                                 netdev->tx_queue_len = 10;
2447                                 adapter->tx_timeout_factor = 8;
2448                                 break;
2449                         case SPEED_100:
2450                                 txb2b = 0;
2451                                 netdev->tx_queue_len = 100;
2452                                 /* maybe add some timeout factor ? */
2453                                 break;
2454                         }
2455
2456                         if ((adapter->hw.mac_type == e1000_82571 ||
2457                              adapter->hw.mac_type == e1000_82572) &&
2458                             txb2b == 0) {
2459 #define SPEED_MODE_BIT (1 << 21)
2460                                 uint32_t tarc0;
2461                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2462                                 tarc0 &= ~SPEED_MODE_BIT;
2463                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2464                         }
2465                                 
2466 #ifdef NETIF_F_TSO
2467                         /* disable TSO for pcie and 10/100 speeds, to avoid
2468                          * some hardware issues */
2469                         if (!adapter->tso_force &&
2470                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2471                                 switch (adapter->link_speed) {
2472                                 case SPEED_10:
2473                                 case SPEED_100:
2474                                         DPRINTK(PROBE,INFO,
2475                                         "10/100 speed: disabling TSO\n");
2476                                         netdev->features &= ~NETIF_F_TSO;
2477                                         break;
2478                                 case SPEED_1000:
2479                                         netdev->features |= NETIF_F_TSO;
2480                                         break;
2481                                 default:
2482                                         /* oops */
2483                                         break;
2484                                 }
2485                         }
2486 #endif
2487
2488                         /* enable transmits in the hardware, need to do this
2489                          * after setting TARC0 */
2490                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2491                         tctl |= E1000_TCTL_EN;
2492                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2493
2494                         netif_carrier_on(netdev);
2495                         netif_wake_queue(netdev);
2496                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2497                         adapter->smartspeed = 0;
2498                 }
2499         } else {
2500                 if (netif_carrier_ok(netdev)) {
2501                         adapter->link_speed = 0;
2502                         adapter->link_duplex = 0;
2503                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2504                         netif_carrier_off(netdev);
2505                         netif_stop_queue(netdev);
2506                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2507
2508                         /* 80003ES2LAN workaround--
2509                          * For packet buffer work-around on link down event;
2510                          * disable receives in the ISR and
2511                          * reset device here in the watchdog
2512                          */
2513                         if (adapter->hw.mac_type == e1000_80003es2lan)
2514                                 /* reset device */
2515                                 schedule_work(&adapter->reset_task);
2516                 }
2517
2518                 e1000_smartspeed(adapter);
2519         }
2520
2521         e1000_update_stats(adapter);
2522
2523         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2524         adapter->tpt_old = adapter->stats.tpt;
2525         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2526         adapter->colc_old = adapter->stats.colc;
2527
2528         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2529         adapter->gorcl_old = adapter->stats.gorcl;
2530         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2531         adapter->gotcl_old = adapter->stats.gotcl;
2532
2533         e1000_update_adaptive(&adapter->hw);
2534
2535         if (!netif_carrier_ok(netdev)) {
2536                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2537                         /* We've lost link, so the controller stops DMA,
2538                          * but we've got queued Tx work that's never going
2539                          * to get done, so reset controller to flush Tx.
2540                          * (Do the reset outside of interrupt context). */
2541                         adapter->tx_timeout_count++;
2542                         schedule_work(&adapter->reset_task);
2543                 }
2544         }
2545
2546         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2547         if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2548                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2549                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2550                  * else is between 2000-8000. */
2551                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2552                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2553                         adapter->gotcl - adapter->gorcl :
2554                         adapter->gorcl - adapter->gotcl) / 10000;
2555                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2556                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2557         }
2558
2559         /* Cause software interrupt to ensure rx ring is cleaned */
2560         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2561
2562         /* Force detection of hung controller every watchdog period */
2563         adapter->detect_tx_hung = TRUE;
2564
2565         /* With 82571 controllers, LAA may be overwritten due to controller
2566          * reset from the other port. Set the appropriate LAA in RAR[0] */
2567         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2568                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2569
2570         /* Reset the timer */
2571         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2572 }
2573
2574 #define E1000_TX_FLAGS_CSUM             0x00000001
2575 #define E1000_TX_FLAGS_VLAN             0x00000002
2576 #define E1000_TX_FLAGS_TSO              0x00000004
2577 #define E1000_TX_FLAGS_IPV4             0x00000008
2578 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2579 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2580
2581 static int
2582 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2583           struct sk_buff *skb)
2584 {
2585 #ifdef NETIF_F_TSO
2586         struct e1000_context_desc *context_desc;
2587         struct e1000_buffer *buffer_info;
2588         unsigned int i;
2589         uint32_t cmd_length = 0;
2590         uint16_t ipcse = 0, tucse, mss;
2591         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2592         int err;
2593
2594         if (skb_is_gso(skb)) {
2595                 if (skb_header_cloned(skb)) {
2596                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2597                         if (err)
2598                                 return err;
2599                 }
2600
2601                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2602                 mss = skb_shinfo(skb)->gso_size;
2603                 if (skb->protocol == htons(ETH_P_IP)) {
2604                         skb->nh.iph->tot_len = 0;
2605                         skb->nh.iph->check = 0;
2606                         skb->h.th->check =
2607                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2608                                                    skb->nh.iph->daddr,
2609                                                    0,
2610                                                    IPPROTO_TCP,
2611                                                    0);
2612                         cmd_length = E1000_TXD_CMD_IP;
2613                         ipcse = skb->h.raw - skb->data - 1;
2614 #ifdef NETIF_F_TSO_IPV6
2615                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2616                         skb->nh.ipv6h->payload_len = 0;
2617                         skb->h.th->check =
2618                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2619                                                  &skb->nh.ipv6h->daddr,
2620                                                  0,
2621                                                  IPPROTO_TCP,
2622                                                  0);
2623                         ipcse = 0;
2624 #endif
2625                 }
2626                 ipcss = skb->nh.raw - skb->data;
2627                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2628                 tucss = skb->h.raw - skb->data;
2629                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2630                 tucse = 0;
2631
2632                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2633                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2634
2635                 i = tx_ring->next_to_use;
2636                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2637                 buffer_info = &tx_ring->buffer_info[i];
2638
2639                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2640                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2641                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2642                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2643                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2644                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2645                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2646                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2647                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2648
2649                 buffer_info->time_stamp = jiffies;
2650
2651                 if (++i == tx_ring->count) i = 0;
2652                 tx_ring->next_to_use = i;
2653
2654                 return TRUE;
2655         }
2656 #endif
2657
2658         return FALSE;
2659 }
2660
2661 static boolean_t
2662 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2663               struct sk_buff *skb)
2664 {
2665         struct e1000_context_desc *context_desc;
2666         struct e1000_buffer *buffer_info;
2667         unsigned int i;
2668         uint8_t css;
2669
2670         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2671                 css = skb->h.raw - skb->data;
2672
2673                 i = tx_ring->next_to_use;
2674                 buffer_info = &tx_ring->buffer_info[i];
2675                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2676
2677                 context_desc->upper_setup.tcp_fields.tucss = css;
2678                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2679                 context_desc->upper_setup.tcp_fields.tucse = 0;
2680                 context_desc->tcp_seg_setup.data = 0;
2681                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2682
2683                 buffer_info->time_stamp = jiffies;
2684
2685                 if (unlikely(++i == tx_ring->count)) i = 0;
2686                 tx_ring->next_to_use = i;
2687
2688                 return TRUE;
2689         }
2690
2691         return FALSE;
2692 }
2693
2694 #define E1000_MAX_TXD_PWR       12
2695 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2696
2697 static int
2698 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2699              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2700              unsigned int nr_frags, unsigned int mss)
2701 {
2702         struct e1000_buffer *buffer_info;
2703         unsigned int len = skb->len;
2704         unsigned int offset = 0, size, count = 0, i;
2705         unsigned int f;
2706         len -= skb->data_len;
2707
2708         i = tx_ring->next_to_use;
2709
2710         while (len) {
2711                 buffer_info = &tx_ring->buffer_info[i];
2712                 size = min(len, max_per_txd);
2713 #ifdef NETIF_F_TSO
2714                 /* Workaround for Controller erratum --
2715                  * descriptor for non-tso packet in a linear SKB that follows a
2716                  * tso gets written back prematurely before the data is fully
2717                  * DMA'd to the controller */
2718                 if (!skb->data_len && tx_ring->last_tx_tso &&
2719                     !skb_is_gso(skb)) {
2720                         tx_ring->last_tx_tso = 0;
2721                         size -= 4;
2722                 }
2723
2724                 /* Workaround for premature desc write-backs
2725                  * in TSO mode.  Append 4-byte sentinel desc */
2726                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2727                         size -= 4;
2728 #endif
2729                 /* work-around for errata 10 and it applies
2730                  * to all controllers in PCI-X mode
2731                  * The fix is to make sure that the first descriptor of a
2732                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2733                  */
2734                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2735                                 (size > 2015) && count == 0))
2736                         size = 2015;
2737
2738                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2739                  * terminating buffers within evenly-aligned dwords. */
2740                 if (unlikely(adapter->pcix_82544 &&
2741                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2742                    size > 4))
2743                         size -= 4;
2744
2745                 buffer_info->length = size;
2746                 buffer_info->dma =
2747                         pci_map_single(adapter->pdev,
2748                                 skb->data + offset,
2749                                 size,
2750                                 PCI_DMA_TODEVICE);
2751                 buffer_info->time_stamp = jiffies;
2752
2753                 len -= size;
2754                 offset += size;
2755                 count++;
2756                 if (unlikely(++i == tx_ring->count)) i = 0;
2757         }
2758
2759         for (f = 0; f < nr_frags; f++) {
2760                 struct skb_frag_struct *frag;
2761
2762                 frag = &skb_shinfo(skb)->frags[f];
2763                 len = frag->size;
2764                 offset = frag->page_offset;
2765
2766                 while (len) {
2767                         buffer_info = &tx_ring->buffer_info[i];
2768                         size = min(len, max_per_txd);
2769 #ifdef NETIF_F_TSO
2770                         /* Workaround for premature desc write-backs
2771                          * in TSO mode.  Append 4-byte sentinel desc */
2772                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2773                                 size -= 4;
2774 #endif
2775                         /* Workaround for potential 82544 hang in PCI-X.
2776                          * Avoid terminating buffers within evenly-aligned
2777                          * dwords. */
2778                         if (unlikely(adapter->pcix_82544 &&
2779                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2780                            size > 4))
2781                                 size -= 4;
2782
2783                         buffer_info->length = size;
2784                         buffer_info->dma =
2785                                 pci_map_page(adapter->pdev,
2786                                         frag->page,
2787                                         offset,
2788                                         size,
2789                                         PCI_DMA_TODEVICE);
2790                         buffer_info->time_stamp = jiffies;
2791
2792                         len -= size;
2793                         offset += size;
2794                         count++;
2795                         if (unlikely(++i == tx_ring->count)) i = 0;
2796                 }
2797         }
2798
2799         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2800         tx_ring->buffer_info[i].skb = skb;
2801         tx_ring->buffer_info[first].next_to_watch = i;
2802
2803         return count;
2804 }
2805
2806 static void
2807 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2808                int tx_flags, int count)
2809 {
2810         struct e1000_tx_desc *tx_desc = NULL;
2811         struct e1000_buffer *buffer_info;
2812         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2813         unsigned int i;
2814
2815         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2816                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2817                              E1000_TXD_CMD_TSE;
2818                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2819
2820                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2821                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2822         }
2823
2824         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2825                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2826                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2827         }
2828
2829         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2830                 txd_lower |= E1000_TXD_CMD_VLE;
2831                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2832         }
2833
2834         i = tx_ring->next_to_use;
2835
2836         while (count--) {
2837                 buffer_info = &tx_ring->buffer_info[i];
2838                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2839                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2840                 tx_desc->lower.data =
2841                         cpu_to_le32(txd_lower | buffer_info->length);
2842                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2843                 if (unlikely(++i == tx_ring->count)) i = 0;
2844         }
2845
2846         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2847
2848         /* Force memory writes to complete before letting h/w
2849          * know there are new descriptors to fetch.  (Only
2850          * applicable for weak-ordered memory model archs,
2851          * such as IA-64). */
2852         wmb();
2853
2854         tx_ring->next_to_use = i;
2855         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2856 }
2857
2858 /**
2859  * 82547 workaround to avoid controller hang in half-duplex environment.
2860  * The workaround is to avoid queuing a large packet that would span
2861  * the internal Tx FIFO ring boundary by notifying the stack to resend
2862  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2863  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2864  * to the beginning of the Tx FIFO.
2865  **/
2866
2867 #define E1000_FIFO_HDR                  0x10
2868 #define E1000_82547_PAD_LEN             0x3E0
2869
2870 static int
2871 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2872 {
2873         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2874         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2875
2876         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2877
2878         if (adapter->link_duplex != HALF_DUPLEX)
2879                 goto no_fifo_stall_required;
2880
2881         if (atomic_read(&adapter->tx_fifo_stall))
2882                 return 1;
2883
2884         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2885                 atomic_set(&adapter->tx_fifo_stall, 1);
2886                 return 1;
2887         }
2888
2889 no_fifo_stall_required:
2890         adapter->tx_fifo_head += skb_fifo_len;
2891         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2892                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2893         return 0;
2894 }
2895
2896 #define MINIMUM_DHCP_PACKET_SIZE 282
2897 static int
2898 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2899 {
2900         struct e1000_hw *hw =  &adapter->hw;
2901         uint16_t length, offset;
2902         if (vlan_tx_tag_present(skb)) {
2903                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2904                         ( adapter->hw.mng_cookie.status &
2905                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2906                         return 0;
2907         }
2908         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2909                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2910                 if ((htons(ETH_P_IP) == eth->h_proto)) {
2911                         const struct iphdr *ip =
2912                                 (struct iphdr *)((uint8_t *)skb->data+14);
2913                         if (IPPROTO_UDP == ip->protocol) {
2914                                 struct udphdr *udp =
2915                                         (struct udphdr *)((uint8_t *)ip +
2916                                                 (ip->ihl << 2));
2917                                 if (ntohs(udp->dest) == 67) {
2918                                         offset = (uint8_t *)udp + 8 - skb->data;
2919                                         length = skb->len - offset;
2920
2921                                         return e1000_mng_write_dhcp_info(hw,
2922                                                         (uint8_t *)udp + 8,
2923                                                         length);
2924                                 }
2925                         }
2926                 }
2927         }
2928         return 0;
2929 }
2930
2931 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
2932 {
2933         struct e1000_adapter *adapter = netdev_priv(netdev);
2934         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
2935
2936         netif_stop_queue(netdev);
2937         /* Herbert's original patch had:
2938          *  smp_mb__after_netif_stop_queue();
2939          * but since that doesn't exist yet, just open code it. */
2940         smp_mb();
2941
2942         /* We need to check again in a case another CPU has just
2943          * made room available. */
2944         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
2945                 return -EBUSY;
2946
2947         /* A reprieve! */
2948         netif_start_queue(netdev);
2949         return 0;
2950 }
2951
2952 static int e1000_maybe_stop_tx(struct net_device *netdev,
2953                                struct e1000_tx_ring *tx_ring, int size)
2954 {
2955         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
2956                 return 0;
2957         return __e1000_maybe_stop_tx(netdev, size);
2958 }
2959
2960 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2961 static int
2962 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2963 {
2964         struct e1000_adapter *adapter = netdev_priv(netdev);
2965         struct e1000_tx_ring *tx_ring;
2966         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2967         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2968         unsigned int tx_flags = 0;
2969         unsigned int len = skb->len;
2970         unsigned long flags;
2971         unsigned int nr_frags = 0;
2972         unsigned int mss = 0;
2973         int count = 0;
2974         int tso;
2975         unsigned int f;
2976         len -= skb->data_len;
2977
2978         /* This goes back to the question of how to logically map a tx queue
2979          * to a flow.  Right now, performance is impacted slightly negatively
2980          * if using multiple tx queues.  If the stack breaks away from a
2981          * single qdisc implementation, we can look at this again. */
2982         tx_ring = adapter->tx_ring;
2983
2984         if (unlikely(skb->len <= 0)) {
2985                 dev_kfree_skb_any(skb);
2986                 return NETDEV_TX_OK;
2987         }
2988
2989 #ifdef NETIF_F_TSO
2990         mss = skb_shinfo(skb)->gso_size;
2991         /* The controller does a simple calculation to
2992          * make sure there is enough room in the FIFO before
2993          * initiating the DMA for each buffer.  The calc is:
2994          * 4 = ceil(buffer len/mss).  To make sure we don't
2995          * overrun the FIFO, adjust the max buffer len if mss
2996          * drops. */
2997         if (mss) {
2998                 uint8_t hdr_len;
2999                 max_per_txd = min(mss << 2, max_per_txd);
3000                 max_txd_pwr = fls(max_per_txd) - 1;
3001
3002         /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3003          * points to just header, pull a few bytes of payload from
3004          * frags into skb->data */
3005                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
3006                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
3007                         switch (adapter->hw.mac_type) {
3008                                 unsigned int pull_size;
3009                         case e1000_82571:
3010                         case e1000_82572:
3011                         case e1000_82573:
3012                         case e1000_ich8lan:
3013                                 pull_size = min((unsigned int)4, skb->data_len);
3014                                 if (!__pskb_pull_tail(skb, pull_size)) {
3015                                         DPRINTK(DRV, ERR,
3016                                                 "__pskb_pull_tail failed.\n");
3017                                         dev_kfree_skb_any(skb);
3018                                         return NETDEV_TX_OK;
3019                                 }
3020                                 len = skb->len - skb->data_len;
3021                                 break;
3022                         default:
3023                                 /* do nothing */
3024                                 break;
3025                         }
3026                 }
3027         }
3028
3029         /* reserve a descriptor for the offload context */
3030         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3031                 count++;
3032         count++;
3033 #else
3034         if (skb->ip_summed == CHECKSUM_PARTIAL)
3035                 count++;
3036 #endif
3037
3038 #ifdef NETIF_F_TSO
3039         /* Controller Erratum workaround */
3040         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3041                 count++;
3042 #endif
3043
3044         count += TXD_USE_COUNT(len, max_txd_pwr);
3045
3046         if (adapter->pcix_82544)
3047                 count++;
3048
3049         /* work-around for errata 10 and it applies to all controllers
3050          * in PCI-X mode, so add one more descriptor to the count
3051          */
3052         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3053                         (len > 2015)))
3054                 count++;
3055
3056         nr_frags = skb_shinfo(skb)->nr_frags;
3057         for (f = 0; f < nr_frags; f++)
3058                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3059                                        max_txd_pwr);
3060         if (adapter->pcix_82544)
3061                 count += nr_frags;
3062
3063
3064         if (adapter->hw.tx_pkt_filtering &&
3065             (adapter->hw.mac_type == e1000_82573))
3066                 e1000_transfer_dhcp_info(adapter, skb);
3067
3068         local_irq_save(flags);
3069         if (!spin_trylock(&tx_ring->tx_lock)) {
3070                 /* Collision - tell upper layer to requeue */
3071                 local_irq_restore(flags);
3072                 return NETDEV_TX_LOCKED;
3073         }
3074
3075         /* need: count + 2 desc gap to keep tail from touching
3076          * head, otherwise try next time */
3077         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3078                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3079                 return NETDEV_TX_BUSY;
3080         }
3081
3082         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3083                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3084                         netif_stop_queue(netdev);
3085                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3086                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3087                         return NETDEV_TX_BUSY;
3088                 }
3089         }
3090
3091         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3092                 tx_flags |= E1000_TX_FLAGS_VLAN;
3093                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3094         }
3095
3096         first = tx_ring->next_to_use;
3097
3098         tso = e1000_tso(adapter, tx_ring, skb);
3099         if (tso < 0) {
3100                 dev_kfree_skb_any(skb);
3101                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3102                 return NETDEV_TX_OK;
3103         }
3104
3105         if (likely(tso)) {
3106                 tx_ring->last_tx_tso = 1;
3107                 tx_flags |= E1000_TX_FLAGS_TSO;
3108         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3109                 tx_flags |= E1000_TX_FLAGS_CSUM;
3110
3111         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3112          * 82571 hardware supports TSO capabilities for IPv6 as well...
3113          * no longer assume, we must. */
3114         if (likely(skb->protocol == htons(ETH_P_IP)))
3115                 tx_flags |= E1000_TX_FLAGS_IPV4;
3116
3117         e1000_tx_queue(adapter, tx_ring, tx_flags,
3118                        e1000_tx_map(adapter, tx_ring, skb, first,
3119                                     max_per_txd, nr_frags, mss));
3120
3121         netdev->trans_start = jiffies;
3122
3123         /* Make sure there is space in the ring for the next send. */
3124         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3125
3126         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3127         return NETDEV_TX_OK;
3128 }
3129
3130 /**
3131  * e1000_tx_timeout - Respond to a Tx Hang
3132  * @netdev: network interface device structure
3133  **/
3134
3135 static void
3136 e1000_tx_timeout(struct net_device *netdev)
3137 {
3138         struct e1000_adapter *adapter = netdev_priv(netdev);
3139
3140         /* Do the reset outside of interrupt context */
3141         adapter->tx_timeout_count++;