blob: 17974121912d85499de931948047e80cd5c5ba19 [file] [log] [blame]
Auke Kokbc7f75f2007-09-17 12:30:59 -07001/*******************************************************************************
2
3 Intel PRO/1000 Linux driver
Bruce Allanad680762008-03-28 09:15:03 -07004 Copyright(c) 1999 - 2008 Intel Corporation.
Auke Kokbc7f75f2007-09-17 12:30:59 -07005
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 <linux/module.h>
30#include <linux/types.h>
31#include <linux/init.h>
32#include <linux/pci.h>
33#include <linux/vmalloc.h>
34#include <linux/pagemap.h>
35#include <linux/delay.h>
36#include <linux/netdevice.h>
37#include <linux/tcp.h>
38#include <linux/ipv6.h>
39#include <net/checksum.h>
40#include <net/ip6_checksum.h>
41#include <linux/mii.h>
42#include <linux/ethtool.h>
43#include <linux/if_vlan.h>
44#include <linux/cpu.h>
45#include <linux/smp.h>
Bruce Allan97ac8ca2008-04-29 09:16:05 -070046#include <linux/pm_qos_params.h>
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +000047#include <linux/aer.h>
Auke Kokbc7f75f2007-09-17 12:30:59 -070048
49#include "e1000.h"
50
Jesse Brandeburg92af3e92009-01-19 14:17:08 +000051#define DRV_VERSION "0.3.3.4-k2"
Auke Kokbc7f75f2007-09-17 12:30:59 -070052char e1000e_driver_name[] = "e1000e";
53const char e1000e_driver_version[] = DRV_VERSION;
54
55static const struct e1000_info *e1000_info_tbl[] = {
56 [board_82571] = &e1000_82571_info,
57 [board_82572] = &e1000_82572_info,
58 [board_82573] = &e1000_82573_info,
Bruce Allan4662e822008-08-26 18:37:06 -070059 [board_82574] = &e1000_82574_info,
Alexander Duyck8c81c9c2009-03-19 01:12:27 +000060 [board_82583] = &e1000_82583_info,
Auke Kokbc7f75f2007-09-17 12:30:59 -070061 [board_80003es2lan] = &e1000_es2_info,
62 [board_ich8lan] = &e1000_ich8_info,
63 [board_ich9lan] = &e1000_ich9_info,
Bruce Allanf4187b52008-08-26 18:36:50 -070064 [board_ich10lan] = &e1000_ich10_info,
Auke Kokbc7f75f2007-09-17 12:30:59 -070065};
66
67#ifdef DEBUG
68/**
69 * e1000_get_hw_dev_name - return device name string
70 * used by hardware layer to print debugging information
71 **/
72char *e1000e_get_hw_dev_name(struct e1000_hw *hw)
73{
Auke Kok589c0852007-10-04 11:38:43 -070074 return hw->adapter->netdev->name;
Auke Kokbc7f75f2007-09-17 12:30:59 -070075}
76#endif
77
78/**
79 * e1000_desc_unused - calculate if we have unused descriptors
80 **/
81static int e1000_desc_unused(struct e1000_ring *ring)
82{
83 if (ring->next_to_clean > ring->next_to_use)
84 return ring->next_to_clean - ring->next_to_use - 1;
85
86 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
87}
88
89/**
Bruce Allanad680762008-03-28 09:15:03 -070090 * e1000_receive_skb - helper function to handle Rx indications
Auke Kokbc7f75f2007-09-17 12:30:59 -070091 * @adapter: board private structure
92 * @status: descriptor status field as written by hardware
93 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
94 * @skb: pointer to sk_buff to be indicated to stack
95 **/
96static void e1000_receive_skb(struct e1000_adapter *adapter,
97 struct net_device *netdev,
98 struct sk_buff *skb,
Al Viroa39fe742007-12-11 19:50:34 +000099 u8 status, __le16 vlan)
Auke Kokbc7f75f2007-09-17 12:30:59 -0700100{
101 skb->protocol = eth_type_trans(skb, netdev);
102
103 if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
Herbert Xuc405b822009-01-14 20:37:59 -0800104 vlan_gro_receive(&adapter->napi, adapter->vlgrp,
105 le16_to_cpu(vlan), skb);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700106 else
Herbert Xu89c88b12008-12-15 23:46:15 -0800107 napi_gro_receive(&adapter->napi, skb);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700108}
109
110/**
111 * e1000_rx_checksum - Receive Checksum Offload for 82543
112 * @adapter: board private structure
113 * @status_err: receive descriptor status and error fields
114 * @csum: receive descriptor csum field
115 * @sk_buff: socket buffer with received data
116 **/
117static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
118 u32 csum, struct sk_buff *skb)
119{
120 u16 status = (u16)status_err;
121 u8 errors = (u8)(status_err >> 24);
122 skb->ip_summed = CHECKSUM_NONE;
123
124 /* Ignore Checksum bit is set */
125 if (status & E1000_RXD_STAT_IXSM)
126 return;
127 /* TCP/UDP checksum error bit is set */
128 if (errors & E1000_RXD_ERR_TCPE) {
129 /* let the stack verify checksum errors */
130 adapter->hw_csum_err++;
131 return;
132 }
133
134 /* TCP/UDP Checksum has not been calculated */
135 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
136 return;
137
138 /* It must be a TCP or UDP packet with a valid checksum */
139 if (status & E1000_RXD_STAT_TCPCS) {
140 /* TCP checksum is good */
141 skb->ip_summed = CHECKSUM_UNNECESSARY;
142 } else {
Bruce Allanad680762008-03-28 09:15:03 -0700143 /*
144 * IP fragment with UDP payload
145 * Hardware complements the payload checksum, so we undo it
Auke Kokbc7f75f2007-09-17 12:30:59 -0700146 * and then put the value in host order for further stack use.
147 */
Al Viroa39fe742007-12-11 19:50:34 +0000148 __sum16 sum = (__force __sum16)htons(csum);
149 skb->csum = csum_unfold(~sum);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700150 skb->ip_summed = CHECKSUM_COMPLETE;
151 }
152 adapter->hw_csum_good++;
153}
154
155/**
156 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
157 * @adapter: address of board private structure
158 **/
159static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
160 int cleaned_count)
161{
162 struct net_device *netdev = adapter->netdev;
163 struct pci_dev *pdev = adapter->pdev;
164 struct e1000_ring *rx_ring = adapter->rx_ring;
165 struct e1000_rx_desc *rx_desc;
166 struct e1000_buffer *buffer_info;
167 struct sk_buff *skb;
168 unsigned int i;
169 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
170
171 i = rx_ring->next_to_use;
172 buffer_info = &rx_ring->buffer_info[i];
173
174 while (cleaned_count--) {
175 skb = buffer_info->skb;
176 if (skb) {
177 skb_trim(skb, 0);
178 goto map_skb;
179 }
180
181 skb = netdev_alloc_skb(netdev, bufsz);
182 if (!skb) {
183 /* Better luck next round */
184 adapter->alloc_rx_buff_failed++;
185 break;
186 }
187
Bruce Allanad680762008-03-28 09:15:03 -0700188 /*
189 * Make buffer alignment 2 beyond a 16 byte boundary
Auke Kokbc7f75f2007-09-17 12:30:59 -0700190 * this will result in a 16 byte aligned IP header after
191 * the 14 byte MAC header is removed
192 */
193 skb_reserve(skb, NET_IP_ALIGN);
194
195 buffer_info->skb = skb;
196map_skb:
197 buffer_info->dma = pci_map_single(pdev, skb->data,
198 adapter->rx_buffer_len,
199 PCI_DMA_FROMDEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700200 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -0700201 dev_err(&pdev->dev, "RX DMA map failed\n");
202 adapter->rx_dma_failed++;
203 break;
204 }
205
206 rx_desc = E1000_RX_DESC(*rx_ring, i);
207 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
208
209 i++;
210 if (i == rx_ring->count)
211 i = 0;
212 buffer_info = &rx_ring->buffer_info[i];
213 }
214
215 if (rx_ring->next_to_use != i) {
216 rx_ring->next_to_use = i;
217 if (i-- == 0)
218 i = (rx_ring->count - 1);
219
Bruce Allanad680762008-03-28 09:15:03 -0700220 /*
221 * Force memory writes to complete before letting h/w
Auke Kokbc7f75f2007-09-17 12:30:59 -0700222 * know there are new descriptors to fetch. (Only
223 * applicable for weak-ordered memory model archs,
Bruce Allanad680762008-03-28 09:15:03 -0700224 * such as IA-64).
225 */
Auke Kokbc7f75f2007-09-17 12:30:59 -0700226 wmb();
227 writel(i, adapter->hw.hw_addr + rx_ring->tail);
228 }
229}
230
231/**
232 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
233 * @adapter: address of board private structure
234 **/
235static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
236 int cleaned_count)
237{
238 struct net_device *netdev = adapter->netdev;
239 struct pci_dev *pdev = adapter->pdev;
240 union e1000_rx_desc_packet_split *rx_desc;
241 struct e1000_ring *rx_ring = adapter->rx_ring;
242 struct e1000_buffer *buffer_info;
243 struct e1000_ps_page *ps_page;
244 struct sk_buff *skb;
245 unsigned int i, j;
246
247 i = rx_ring->next_to_use;
248 buffer_info = &rx_ring->buffer_info[i];
249
250 while (cleaned_count--) {
251 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
252
253 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
Auke Kok47f44e42007-10-25 13:57:44 -0700254 ps_page = &buffer_info->ps_pages[j];
255 if (j >= adapter->rx_ps_pages) {
256 /* all unused desc entries get hw null ptr */
Al Viroa39fe742007-12-11 19:50:34 +0000257 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
Auke Kok47f44e42007-10-25 13:57:44 -0700258 continue;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700259 }
Auke Kok47f44e42007-10-25 13:57:44 -0700260 if (!ps_page->page) {
261 ps_page->page = alloc_page(GFP_ATOMIC);
262 if (!ps_page->page) {
263 adapter->alloc_rx_buff_failed++;
264 goto no_buffers;
265 }
266 ps_page->dma = pci_map_page(pdev,
267 ps_page->page,
268 0, PAGE_SIZE,
269 PCI_DMA_FROMDEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700270 if (pci_dma_mapping_error(pdev, ps_page->dma)) {
Auke Kok47f44e42007-10-25 13:57:44 -0700271 dev_err(&adapter->pdev->dev,
272 "RX DMA page map failed\n");
273 adapter->rx_dma_failed++;
274 goto no_buffers;
275 }
276 }
277 /*
278 * Refresh the desc even if buffer_addrs
279 * didn't change because each write-back
280 * erases this info.
281 */
282 rx_desc->read.buffer_addr[j+1] =
283 cpu_to_le64(ps_page->dma);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700284 }
285
286 skb = netdev_alloc_skb(netdev,
287 adapter->rx_ps_bsize0 + NET_IP_ALIGN);
288
289 if (!skb) {
290 adapter->alloc_rx_buff_failed++;
291 break;
292 }
293
Bruce Allanad680762008-03-28 09:15:03 -0700294 /*
295 * Make buffer alignment 2 beyond a 16 byte boundary
Auke Kokbc7f75f2007-09-17 12:30:59 -0700296 * this will result in a 16 byte aligned IP header after
297 * the 14 byte MAC header is removed
298 */
299 skb_reserve(skb, NET_IP_ALIGN);
300
301 buffer_info->skb = skb;
302 buffer_info->dma = pci_map_single(pdev, skb->data,
303 adapter->rx_ps_bsize0,
304 PCI_DMA_FROMDEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700305 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -0700306 dev_err(&pdev->dev, "RX DMA map failed\n");
307 adapter->rx_dma_failed++;
308 /* cleanup skb */
309 dev_kfree_skb_any(skb);
310 buffer_info->skb = NULL;
311 break;
312 }
313
314 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
315
316 i++;
317 if (i == rx_ring->count)
318 i = 0;
319 buffer_info = &rx_ring->buffer_info[i];
320 }
321
322no_buffers:
323 if (rx_ring->next_to_use != i) {
324 rx_ring->next_to_use = i;
325
326 if (!(i--))
327 i = (rx_ring->count - 1);
328
Bruce Allanad680762008-03-28 09:15:03 -0700329 /*
330 * Force memory writes to complete before letting h/w
Auke Kokbc7f75f2007-09-17 12:30:59 -0700331 * know there are new descriptors to fetch. (Only
332 * applicable for weak-ordered memory model archs,
Bruce Allanad680762008-03-28 09:15:03 -0700333 * such as IA-64).
334 */
Auke Kokbc7f75f2007-09-17 12:30:59 -0700335 wmb();
Bruce Allanad680762008-03-28 09:15:03 -0700336 /*
337 * Hardware increments by 16 bytes, but packet split
Auke Kokbc7f75f2007-09-17 12:30:59 -0700338 * descriptors are 32 bytes...so we increment tail
339 * twice as much.
340 */
341 writel(i<<1, adapter->hw.hw_addr + rx_ring->tail);
342 }
343}
344
345/**
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700346 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
347 * @adapter: address of board private structure
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700348 * @cleaned_count: number of buffers to allocate this pass
349 **/
350
351static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
352 int cleaned_count)
353{
354 struct net_device *netdev = adapter->netdev;
355 struct pci_dev *pdev = adapter->pdev;
356 struct e1000_rx_desc *rx_desc;
357 struct e1000_ring *rx_ring = adapter->rx_ring;
358 struct e1000_buffer *buffer_info;
359 struct sk_buff *skb;
360 unsigned int i;
361 unsigned int bufsz = 256 -
362 16 /* for skb_reserve */ -
363 NET_IP_ALIGN;
364
365 i = rx_ring->next_to_use;
366 buffer_info = &rx_ring->buffer_info[i];
367
368 while (cleaned_count--) {
369 skb = buffer_info->skb;
370 if (skb) {
371 skb_trim(skb, 0);
372 goto check_page;
373 }
374
375 skb = netdev_alloc_skb(netdev, bufsz);
376 if (unlikely(!skb)) {
377 /* Better luck next round */
378 adapter->alloc_rx_buff_failed++;
379 break;
380 }
381
382 /* Make buffer alignment 2 beyond a 16 byte boundary
383 * this will result in a 16 byte aligned IP header after
384 * the 14 byte MAC header is removed
385 */
386 skb_reserve(skb, NET_IP_ALIGN);
387
388 buffer_info->skb = skb;
389check_page:
390 /* allocate a new page if necessary */
391 if (!buffer_info->page) {
392 buffer_info->page = alloc_page(GFP_ATOMIC);
393 if (unlikely(!buffer_info->page)) {
394 adapter->alloc_rx_buff_failed++;
395 break;
396 }
397 }
398
399 if (!buffer_info->dma)
400 buffer_info->dma = pci_map_page(pdev,
401 buffer_info->page, 0,
402 PAGE_SIZE,
403 PCI_DMA_FROMDEVICE);
404
405 rx_desc = E1000_RX_DESC(*rx_ring, i);
406 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
407
408 if (unlikely(++i == rx_ring->count))
409 i = 0;
410 buffer_info = &rx_ring->buffer_info[i];
411 }
412
413 if (likely(rx_ring->next_to_use != i)) {
414 rx_ring->next_to_use = i;
415 if (unlikely(i-- == 0))
416 i = (rx_ring->count - 1);
417
418 /* Force memory writes to complete before letting h/w
419 * know there are new descriptors to fetch. (Only
420 * applicable for weak-ordered memory model archs,
421 * such as IA-64). */
422 wmb();
423 writel(i, adapter->hw.hw_addr + rx_ring->tail);
424 }
425}
426
427/**
Auke Kokbc7f75f2007-09-17 12:30:59 -0700428 * e1000_clean_rx_irq - Send received data up the network stack; legacy
429 * @adapter: board private structure
430 *
431 * the return value indicates whether actual cleaning was done, there
432 * is no guarantee that everything was cleaned
433 **/
434static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
435 int *work_done, int work_to_do)
436{
437 struct net_device *netdev = adapter->netdev;
438 struct pci_dev *pdev = adapter->pdev;
439 struct e1000_ring *rx_ring = adapter->rx_ring;
440 struct e1000_rx_desc *rx_desc, *next_rxd;
441 struct e1000_buffer *buffer_info, *next_buffer;
442 u32 length;
443 unsigned int i;
444 int cleaned_count = 0;
445 bool cleaned = 0;
446 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
447
448 i = rx_ring->next_to_clean;
449 rx_desc = E1000_RX_DESC(*rx_ring, i);
450 buffer_info = &rx_ring->buffer_info[i];
451
452 while (rx_desc->status & E1000_RXD_STAT_DD) {
453 struct sk_buff *skb;
454 u8 status;
455
456 if (*work_done >= work_to_do)
457 break;
458 (*work_done)++;
459
460 status = rx_desc->status;
461 skb = buffer_info->skb;
462 buffer_info->skb = NULL;
463
464 prefetch(skb->data - NET_IP_ALIGN);
465
466 i++;
467 if (i == rx_ring->count)
468 i = 0;
469 next_rxd = E1000_RX_DESC(*rx_ring, i);
470 prefetch(next_rxd);
471
472 next_buffer = &rx_ring->buffer_info[i];
473
474 cleaned = 1;
475 cleaned_count++;
476 pci_unmap_single(pdev,
477 buffer_info->dma,
478 adapter->rx_buffer_len,
479 PCI_DMA_FROMDEVICE);
480 buffer_info->dma = 0;
481
482 length = le16_to_cpu(rx_desc->length);
483
484 /* !EOP means multiple descriptors were used to store a single
485 * packet, also make sure the frame isn't just CRC only */
486 if (!(status & E1000_RXD_STAT_EOP) || (length <= 4)) {
487 /* All receives must fit into a single buffer */
Jeff Kirsher44defeb2008-08-04 17:20:41 -0700488 e_dbg("%s: Receive packet consumed multiple buffers\n",
489 netdev->name);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700490 /* recycle */
491 buffer_info->skb = skb;
492 goto next_desc;
493 }
494
495 if (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
496 /* recycle */
497 buffer_info->skb = skb;
498 goto next_desc;
499 }
500
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +0000501 /* adjust length to remove Ethernet CRC */
502 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
503 length -= 4;
504
Auke Kokbc7f75f2007-09-17 12:30:59 -0700505 total_rx_bytes += length;
506 total_rx_packets++;
507
Bruce Allanad680762008-03-28 09:15:03 -0700508 /*
509 * code added for copybreak, this should improve
Auke Kokbc7f75f2007-09-17 12:30:59 -0700510 * performance for small packets with large amounts
Bruce Allanad680762008-03-28 09:15:03 -0700511 * of reassembly being done in the stack
512 */
Auke Kokbc7f75f2007-09-17 12:30:59 -0700513 if (length < copybreak) {
514 struct sk_buff *new_skb =
515 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
516 if (new_skb) {
517 skb_reserve(new_skb, NET_IP_ALIGN);
Bruce Allan808ff672008-08-08 18:35:56 -0700518 skb_copy_to_linear_data_offset(new_skb,
519 -NET_IP_ALIGN,
520 (skb->data -
521 NET_IP_ALIGN),
522 (length +
523 NET_IP_ALIGN));
Auke Kokbc7f75f2007-09-17 12:30:59 -0700524 /* save the skb in buffer_info as good */
525 buffer_info->skb = skb;
526 skb = new_skb;
527 }
528 /* else just continue with the old one */
529 }
530 /* end copybreak code */
531 skb_put(skb, length);
532
533 /* Receive Checksum Offload */
534 e1000_rx_checksum(adapter,
535 (u32)(status) |
536 ((u32)(rx_desc->errors) << 24),
537 le16_to_cpu(rx_desc->csum), skb);
538
539 e1000_receive_skb(adapter, netdev, skb,status,rx_desc->special);
540
541next_desc:
542 rx_desc->status = 0;
543
544 /* return some buffers to hardware, one at a time is too slow */
545 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
546 adapter->alloc_rx_buf(adapter, cleaned_count);
547 cleaned_count = 0;
548 }
549
550 /* use prefetched values */
551 rx_desc = next_rxd;
552 buffer_info = next_buffer;
553 }
554 rx_ring->next_to_clean = i;
555
556 cleaned_count = e1000_desc_unused(rx_ring);
557 if (cleaned_count)
558 adapter->alloc_rx_buf(adapter, cleaned_count);
559
Auke Kokbc7f75f2007-09-17 12:30:59 -0700560 adapter->total_rx_bytes += total_rx_bytes;
Bruce Allan7c257692008-04-23 11:09:00 -0700561 adapter->total_rx_packets += total_rx_packets;
Auke Kok41988692007-11-13 20:48:36 -0800562 adapter->net_stats.rx_bytes += total_rx_bytes;
Bruce Allan7c257692008-04-23 11:09:00 -0700563 adapter->net_stats.rx_packets += total_rx_packets;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700564 return cleaned;
565}
566
Auke Kokbc7f75f2007-09-17 12:30:59 -0700567static void e1000_put_txbuf(struct e1000_adapter *adapter,
568 struct e1000_buffer *buffer_info)
569{
Jesse Brandeburg8ddc9512009-03-02 16:02:53 -0800570 buffer_info->dma = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700571 if (buffer_info->skb) {
Jesse Brandeburg8ddc9512009-03-02 16:02:53 -0800572 skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb,
573 DMA_TO_DEVICE);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700574 dev_kfree_skb_any(buffer_info->skb);
575 buffer_info->skb = NULL;
576 }
Alexander Duyck1b7719c2009-03-19 01:12:50 +0000577 buffer_info->time_stamp = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700578}
579
580static void e1000_print_tx_hang(struct e1000_adapter *adapter)
581{
582 struct e1000_ring *tx_ring = adapter->tx_ring;
583 unsigned int i = tx_ring->next_to_clean;
584 unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
585 struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700586
587 /* detected Tx unit hang */
Jeff Kirsher44defeb2008-08-04 17:20:41 -0700588 e_err("Detected Tx Unit Hang:\n"
589 " TDH <%x>\n"
590 " TDT <%x>\n"
591 " next_to_use <%x>\n"
592 " next_to_clean <%x>\n"
593 "buffer_info[next_to_clean]:\n"
594 " time_stamp <%lx>\n"
595 " next_to_watch <%x>\n"
596 " jiffies <%lx>\n"
597 " next_to_watch.status <%x>\n",
598 readl(adapter->hw.hw_addr + tx_ring->head),
599 readl(adapter->hw.hw_addr + tx_ring->tail),
600 tx_ring->next_to_use,
601 tx_ring->next_to_clean,
602 tx_ring->buffer_info[eop].time_stamp,
603 eop,
604 jiffies,
605 eop_desc->upper.fields.status);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700606}
607
608/**
609 * e1000_clean_tx_irq - Reclaim resources after transmit completes
610 * @adapter: board private structure
611 *
612 * the return value indicates whether actual cleaning was done, there
613 * is no guarantee that everything was cleaned
614 **/
615static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
616{
617 struct net_device *netdev = adapter->netdev;
618 struct e1000_hw *hw = &adapter->hw;
619 struct e1000_ring *tx_ring = adapter->tx_ring;
620 struct e1000_tx_desc *tx_desc, *eop_desc;
621 struct e1000_buffer *buffer_info;
622 unsigned int i, eop;
623 unsigned int count = 0;
Alexander Duyck12d04a32009-03-25 22:05:03 +0000624 bool cleaned;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700625 unsigned int total_tx_bytes = 0, total_tx_packets = 0;
626
627 i = tx_ring->next_to_clean;
628 eop = tx_ring->buffer_info[i].next_to_watch;
629 eop_desc = E1000_TX_DESC(*tx_ring, eop);
630
Alexander Duyck12d04a32009-03-25 22:05:03 +0000631 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
632 (count < tx_ring->count)) {
633 for (cleaned = 0; !cleaned; count++) {
Auke Kokbc7f75f2007-09-17 12:30:59 -0700634 tx_desc = E1000_TX_DESC(*tx_ring, i);
635 buffer_info = &tx_ring->buffer_info[i];
636 cleaned = (i == eop);
637
638 if (cleaned) {
639 struct sk_buff *skb = buffer_info->skb;
640 unsigned int segs, bytecount;
641 segs = skb_shinfo(skb)->gso_segs ?: 1;
642 /* multiply data chunks by size of headers */
643 bytecount = ((segs - 1) * skb_headlen(skb)) +
644 skb->len;
645 total_tx_packets += segs;
646 total_tx_bytes += bytecount;
647 }
648
649 e1000_put_txbuf(adapter, buffer_info);
650 tx_desc->upper.data = 0;
651
652 i++;
653 if (i == tx_ring->count)
654 i = 0;
655 }
656
657 eop = tx_ring->buffer_info[i].next_to_watch;
658 eop_desc = E1000_TX_DESC(*tx_ring, eop);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700659 }
660
661 tx_ring->next_to_clean = i;
662
663#define TX_WAKE_THRESHOLD 32
664 if (cleaned && netif_carrier_ok(netdev) &&
665 e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
666 /* Make sure that anybody stopping the queue after this
667 * sees the new next_to_clean.
668 */
669 smp_mb();
670
671 if (netif_queue_stopped(netdev) &&
672 !(test_bit(__E1000_DOWN, &adapter->state))) {
673 netif_wake_queue(netdev);
674 ++adapter->restart_queue;
675 }
676 }
677
678 if (adapter->detect_tx_hung) {
Alexander Duyck1b7719c2009-03-19 01:12:50 +0000679 /* Detect a transmit hang in hardware, this serializes the
680 * check with the clearing of time_stamp and movement of i */
Auke Kokbc7f75f2007-09-17 12:30:59 -0700681 adapter->detect_tx_hung = 0;
Alexander Duyck12d04a32009-03-25 22:05:03 +0000682 if (tx_ring->buffer_info[i].time_stamp &&
683 time_after(jiffies, tx_ring->buffer_info[i].time_stamp
Auke Kokbc7f75f2007-09-17 12:30:59 -0700684 + (adapter->tx_timeout_factor * HZ))
Bruce Allanad680762008-03-28 09:15:03 -0700685 && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -0700686 e1000_print_tx_hang(adapter);
687 netif_stop_queue(netdev);
688 }
689 }
690 adapter->total_tx_bytes += total_tx_bytes;
691 adapter->total_tx_packets += total_tx_packets;
Auke Kok41988692007-11-13 20:48:36 -0800692 adapter->net_stats.tx_bytes += total_tx_bytes;
Bruce Allan7c257692008-04-23 11:09:00 -0700693 adapter->net_stats.tx_packets += total_tx_packets;
Alexander Duyck12d04a32009-03-25 22:05:03 +0000694 return (count < tx_ring->count);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700695}
696
697/**
Auke Kokbc7f75f2007-09-17 12:30:59 -0700698 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
699 * @adapter: board private structure
700 *
701 * the return value indicates whether actual cleaning was done, there
702 * is no guarantee that everything was cleaned
703 **/
704static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
705 int *work_done, int work_to_do)
706{
707 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
708 struct net_device *netdev = adapter->netdev;
709 struct pci_dev *pdev = adapter->pdev;
710 struct e1000_ring *rx_ring = adapter->rx_ring;
711 struct e1000_buffer *buffer_info, *next_buffer;
712 struct e1000_ps_page *ps_page;
713 struct sk_buff *skb;
714 unsigned int i, j;
715 u32 length, staterr;
716 int cleaned_count = 0;
717 bool cleaned = 0;
718 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
719
720 i = rx_ring->next_to_clean;
721 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
722 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
723 buffer_info = &rx_ring->buffer_info[i];
724
725 while (staterr & E1000_RXD_STAT_DD) {
726 if (*work_done >= work_to_do)
727 break;
728 (*work_done)++;
729 skb = buffer_info->skb;
730
731 /* in the packet split case this is header only */
732 prefetch(skb->data - NET_IP_ALIGN);
733
734 i++;
735 if (i == rx_ring->count)
736 i = 0;
737 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
738 prefetch(next_rxd);
739
740 next_buffer = &rx_ring->buffer_info[i];
741
742 cleaned = 1;
743 cleaned_count++;
744 pci_unmap_single(pdev, buffer_info->dma,
745 adapter->rx_ps_bsize0,
746 PCI_DMA_FROMDEVICE);
747 buffer_info->dma = 0;
748
749 if (!(staterr & E1000_RXD_STAT_EOP)) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -0700750 e_dbg("%s: Packet Split buffers didn't pick up the "
751 "full packet\n", netdev->name);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700752 dev_kfree_skb_irq(skb);
753 goto next_desc;
754 }
755
756 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
757 dev_kfree_skb_irq(skb);
758 goto next_desc;
759 }
760
761 length = le16_to_cpu(rx_desc->wb.middle.length0);
762
763 if (!length) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -0700764 e_dbg("%s: Last part of the packet spanning multiple "
765 "descriptors\n", netdev->name);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700766 dev_kfree_skb_irq(skb);
767 goto next_desc;
768 }
769
770 /* Good Receive */
771 skb_put(skb, length);
772
773 {
Bruce Allanad680762008-03-28 09:15:03 -0700774 /*
775 * this looks ugly, but it seems compiler issues make it
776 * more efficient than reusing j
777 */
Auke Kokbc7f75f2007-09-17 12:30:59 -0700778 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
779
Bruce Allanad680762008-03-28 09:15:03 -0700780 /*
781 * page alloc/put takes too long and effects small packet
782 * throughput, so unsplit small packets and save the alloc/put
783 * only valid in softirq (napi) context to call kmap_*
784 */
Auke Kokbc7f75f2007-09-17 12:30:59 -0700785 if (l1 && (l1 <= copybreak) &&
786 ((length + l1) <= adapter->rx_ps_bsize0)) {
787 u8 *vaddr;
788
Auke Kok47f44e42007-10-25 13:57:44 -0700789 ps_page = &buffer_info->ps_pages[0];
Auke Kokbc7f75f2007-09-17 12:30:59 -0700790
Bruce Allanad680762008-03-28 09:15:03 -0700791 /*
792 * there is no documentation about how to call
Auke Kokbc7f75f2007-09-17 12:30:59 -0700793 * kmap_atomic, so we can't hold the mapping
Bruce Allanad680762008-03-28 09:15:03 -0700794 * very long
795 */
Auke Kokbc7f75f2007-09-17 12:30:59 -0700796 pci_dma_sync_single_for_cpu(pdev, ps_page->dma,
797 PAGE_SIZE, PCI_DMA_FROMDEVICE);
798 vaddr = kmap_atomic(ps_page->page, KM_SKB_DATA_SOFTIRQ);
799 memcpy(skb_tail_pointer(skb), vaddr, l1);
800 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
801 pci_dma_sync_single_for_device(pdev, ps_page->dma,
802 PAGE_SIZE, PCI_DMA_FROMDEVICE);
Auke Kok140a7482007-10-25 13:57:58 -0700803
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +0000804 /* remove the CRC */
805 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
806 l1 -= 4;
807
Auke Kokbc7f75f2007-09-17 12:30:59 -0700808 skb_put(skb, l1);
809 goto copydone;
810 } /* if */
811 }
812
813 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
814 length = le16_to_cpu(rx_desc->wb.upper.length[j]);
815 if (!length)
816 break;
817
Auke Kok47f44e42007-10-25 13:57:44 -0700818 ps_page = &buffer_info->ps_pages[j];
Auke Kokbc7f75f2007-09-17 12:30:59 -0700819 pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
820 PCI_DMA_FROMDEVICE);
821 ps_page->dma = 0;
822 skb_fill_page_desc(skb, j, ps_page->page, 0, length);
823 ps_page->page = NULL;
824 skb->len += length;
825 skb->data_len += length;
826 skb->truesize += length;
827 }
828
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +0000829 /* strip the ethernet crc, problem is we're using pages now so
830 * this whole operation can get a little cpu intensive
831 */
832 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
833 pskb_trim(skb, skb->len - 4);
834
Auke Kokbc7f75f2007-09-17 12:30:59 -0700835copydone:
836 total_rx_bytes += skb->len;
837 total_rx_packets++;
838
839 e1000_rx_checksum(adapter, staterr, le16_to_cpu(
840 rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
841
842 if (rx_desc->wb.upper.header_status &
843 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
844 adapter->rx_hdr_split++;
845
846 e1000_receive_skb(adapter, netdev, skb,
847 staterr, rx_desc->wb.middle.vlan);
848
849next_desc:
850 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
851 buffer_info->skb = NULL;
852
853 /* return some buffers to hardware, one at a time is too slow */
854 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
855 adapter->alloc_rx_buf(adapter, cleaned_count);
856 cleaned_count = 0;
857 }
858
859 /* use prefetched values */
860 rx_desc = next_rxd;
861 buffer_info = next_buffer;
862
863 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
864 }
865 rx_ring->next_to_clean = i;
866
867 cleaned_count = e1000_desc_unused(rx_ring);
868 if (cleaned_count)
869 adapter->alloc_rx_buf(adapter, cleaned_count);
870
Auke Kokbc7f75f2007-09-17 12:30:59 -0700871 adapter->total_rx_bytes += total_rx_bytes;
Bruce Allan7c257692008-04-23 11:09:00 -0700872 adapter->total_rx_packets += total_rx_packets;
Auke Kok41988692007-11-13 20:48:36 -0800873 adapter->net_stats.rx_bytes += total_rx_bytes;
Bruce Allan7c257692008-04-23 11:09:00 -0700874 adapter->net_stats.rx_packets += total_rx_packets;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700875 return cleaned;
876}
877
878/**
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700879 * e1000_consume_page - helper function
880 **/
881static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
882 u16 length)
883{
884 bi->page = NULL;
885 skb->len += length;
886 skb->data_len += length;
887 skb->truesize += length;
888}
889
890/**
891 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
892 * @adapter: board private structure
893 *
894 * the return value indicates whether actual cleaning was done, there
895 * is no guarantee that everything was cleaned
896 **/
897
898static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
899 int *work_done, int work_to_do)
900{
901 struct net_device *netdev = adapter->netdev;
902 struct pci_dev *pdev = adapter->pdev;
903 struct e1000_ring *rx_ring = adapter->rx_ring;
904 struct e1000_rx_desc *rx_desc, *next_rxd;
905 struct e1000_buffer *buffer_info, *next_buffer;
906 u32 length;
907 unsigned int i;
908 int cleaned_count = 0;
909 bool cleaned = false;
910 unsigned int total_rx_bytes=0, total_rx_packets=0;
911
912 i = rx_ring->next_to_clean;
913 rx_desc = E1000_RX_DESC(*rx_ring, i);
914 buffer_info = &rx_ring->buffer_info[i];
915
916 while (rx_desc->status & E1000_RXD_STAT_DD) {
917 struct sk_buff *skb;
918 u8 status;
919
920 if (*work_done >= work_to_do)
921 break;
922 (*work_done)++;
923
924 status = rx_desc->status;
925 skb = buffer_info->skb;
926 buffer_info->skb = NULL;
927
928 ++i;
929 if (i == rx_ring->count)
930 i = 0;
931 next_rxd = E1000_RX_DESC(*rx_ring, i);
932 prefetch(next_rxd);
933
934 next_buffer = &rx_ring->buffer_info[i];
935
936 cleaned = true;
937 cleaned_count++;
938 pci_unmap_page(pdev, buffer_info->dma, PAGE_SIZE,
939 PCI_DMA_FROMDEVICE);
940 buffer_info->dma = 0;
941
942 length = le16_to_cpu(rx_desc->length);
943
944 /* errors is only valid for DD + EOP descriptors */
945 if (unlikely((status & E1000_RXD_STAT_EOP) &&
946 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
947 /* recycle both page and skb */
948 buffer_info->skb = skb;
949 /* an error means any chain goes out the window
950 * too */
951 if (rx_ring->rx_skb_top)
952 dev_kfree_skb(rx_ring->rx_skb_top);
953 rx_ring->rx_skb_top = NULL;
954 goto next_desc;
955 }
956
957#define rxtop rx_ring->rx_skb_top
958 if (!(status & E1000_RXD_STAT_EOP)) {
959 /* this descriptor is only the beginning (or middle) */
960 if (!rxtop) {
961 /* this is the beginning of a chain */
962 rxtop = skb;
963 skb_fill_page_desc(rxtop, 0, buffer_info->page,
964 0, length);
965 } else {
966 /* this is the middle of a chain */
967 skb_fill_page_desc(rxtop,
968 skb_shinfo(rxtop)->nr_frags,
969 buffer_info->page, 0, length);
970 /* re-use the skb, only consumed the page */
971 buffer_info->skb = skb;
972 }
973 e1000_consume_page(buffer_info, rxtop, length);
974 goto next_desc;
975 } else {
976 if (rxtop) {
977 /* end of the chain */
978 skb_fill_page_desc(rxtop,
979 skb_shinfo(rxtop)->nr_frags,
980 buffer_info->page, 0, length);
981 /* re-use the current skb, we only consumed the
982 * page */
983 buffer_info->skb = skb;
984 skb = rxtop;
985 rxtop = NULL;
986 e1000_consume_page(buffer_info, skb, length);
987 } else {
988 /* no chain, got EOP, this buf is the packet
989 * copybreak to save the put_page/alloc_page */
990 if (length <= copybreak &&
991 skb_tailroom(skb) >= length) {
992 u8 *vaddr;
993 vaddr = kmap_atomic(buffer_info->page,
994 KM_SKB_DATA_SOFTIRQ);
995 memcpy(skb_tail_pointer(skb), vaddr,
996 length);
997 kunmap_atomic(vaddr,
998 KM_SKB_DATA_SOFTIRQ);
999 /* re-use the page, so don't erase
1000 * buffer_info->page */
1001 skb_put(skb, length);
1002 } else {
1003 skb_fill_page_desc(skb, 0,
1004 buffer_info->page, 0,
1005 length);
1006 e1000_consume_page(buffer_info, skb,
1007 length);
1008 }
1009 }
1010 }
1011
1012 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1013 e1000_rx_checksum(adapter,
1014 (u32)(status) |
1015 ((u32)(rx_desc->errors) << 24),
1016 le16_to_cpu(rx_desc->csum), skb);
1017
1018 /* probably a little skewed due to removing CRC */
1019 total_rx_bytes += skb->len;
1020 total_rx_packets++;
1021
1022 /* eth type trans needs skb->data to point to something */
1023 if (!pskb_may_pull(skb, ETH_HLEN)) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -07001024 e_err("pskb_may_pull failed.\n");
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001025 dev_kfree_skb(skb);
1026 goto next_desc;
1027 }
1028
1029 e1000_receive_skb(adapter, netdev, skb, status,
1030 rx_desc->special);
1031
1032next_desc:
1033 rx_desc->status = 0;
1034
1035 /* return some buffers to hardware, one at a time is too slow */
1036 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1037 adapter->alloc_rx_buf(adapter, cleaned_count);
1038 cleaned_count = 0;
1039 }
1040
1041 /* use prefetched values */
1042 rx_desc = next_rxd;
1043 buffer_info = next_buffer;
1044 }
1045 rx_ring->next_to_clean = i;
1046
1047 cleaned_count = e1000_desc_unused(rx_ring);
1048 if (cleaned_count)
1049 adapter->alloc_rx_buf(adapter, cleaned_count);
1050
1051 adapter->total_rx_bytes += total_rx_bytes;
1052 adapter->total_rx_packets += total_rx_packets;
1053 adapter->net_stats.rx_bytes += total_rx_bytes;
1054 adapter->net_stats.rx_packets += total_rx_packets;
1055 return cleaned;
1056}
1057
1058/**
Auke Kokbc7f75f2007-09-17 12:30:59 -07001059 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1060 * @adapter: board private structure
1061 **/
1062static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
1063{
1064 struct e1000_ring *rx_ring = adapter->rx_ring;
1065 struct e1000_buffer *buffer_info;
1066 struct e1000_ps_page *ps_page;
1067 struct pci_dev *pdev = adapter->pdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001068 unsigned int i, j;
1069
1070 /* Free all the Rx ring sk_buffs */
1071 for (i = 0; i < rx_ring->count; i++) {
1072 buffer_info = &rx_ring->buffer_info[i];
1073 if (buffer_info->dma) {
1074 if (adapter->clean_rx == e1000_clean_rx_irq)
1075 pci_unmap_single(pdev, buffer_info->dma,
1076 adapter->rx_buffer_len,
1077 PCI_DMA_FROMDEVICE);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001078 else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1079 pci_unmap_page(pdev, buffer_info->dma,
1080 PAGE_SIZE,
1081 PCI_DMA_FROMDEVICE);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001082 else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1083 pci_unmap_single(pdev, buffer_info->dma,
1084 adapter->rx_ps_bsize0,
1085 PCI_DMA_FROMDEVICE);
1086 buffer_info->dma = 0;
1087 }
1088
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001089 if (buffer_info->page) {
1090 put_page(buffer_info->page);
1091 buffer_info->page = NULL;
1092 }
1093
Auke Kokbc7f75f2007-09-17 12:30:59 -07001094 if (buffer_info->skb) {
1095 dev_kfree_skb(buffer_info->skb);
1096 buffer_info->skb = NULL;
1097 }
1098
1099 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
Auke Kok47f44e42007-10-25 13:57:44 -07001100 ps_page = &buffer_info->ps_pages[j];
Auke Kokbc7f75f2007-09-17 12:30:59 -07001101 if (!ps_page->page)
1102 break;
1103 pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
1104 PCI_DMA_FROMDEVICE);
1105 ps_page->dma = 0;
1106 put_page(ps_page->page);
1107 ps_page->page = NULL;
1108 }
1109 }
1110
1111 /* there also may be some cached data from a chained receive */
1112 if (rx_ring->rx_skb_top) {
1113 dev_kfree_skb(rx_ring->rx_skb_top);
1114 rx_ring->rx_skb_top = NULL;
1115 }
1116
Auke Kokbc7f75f2007-09-17 12:30:59 -07001117 /* Zero out the descriptor ring */
1118 memset(rx_ring->desc, 0, rx_ring->size);
1119
1120 rx_ring->next_to_clean = 0;
1121 rx_ring->next_to_use = 0;
1122
1123 writel(0, adapter->hw.hw_addr + rx_ring->head);
1124 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1125}
1126
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07001127static void e1000e_downshift_workaround(struct work_struct *work)
1128{
1129 struct e1000_adapter *adapter = container_of(work,
1130 struct e1000_adapter, downshift_task);
1131
1132 e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1133}
1134
Auke Kokbc7f75f2007-09-17 12:30:59 -07001135/**
1136 * e1000_intr_msi - Interrupt Handler
1137 * @irq: interrupt number
1138 * @data: pointer to a network interface device structure
1139 **/
1140static irqreturn_t e1000_intr_msi(int irq, void *data)
1141{
1142 struct net_device *netdev = data;
1143 struct e1000_adapter *adapter = netdev_priv(netdev);
1144 struct e1000_hw *hw = &adapter->hw;
1145 u32 icr = er32(ICR);
1146
Bruce Allanad680762008-03-28 09:15:03 -07001147 /*
1148 * read ICR disables interrupts using IAM
1149 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001150
dave graham573cca82009-02-10 12:52:05 +00001151 if (icr & E1000_ICR_LSC) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07001152 hw->mac.get_link_status = 1;
Bruce Allanad680762008-03-28 09:15:03 -07001153 /*
1154 * ICH8 workaround-- Call gig speed drop workaround on cable
1155 * disconnect (LSC) before accessing any PHY registers
1156 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001157 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1158 (!(er32(STATUS) & E1000_STATUS_LU)))
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07001159 schedule_work(&adapter->downshift_task);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001160
Bruce Allanad680762008-03-28 09:15:03 -07001161 /*
1162 * 80003ES2LAN workaround-- For packet buffer work-around on
Auke Kokbc7f75f2007-09-17 12:30:59 -07001163 * link down event; disable receives here in the ISR and reset
Bruce Allanad680762008-03-28 09:15:03 -07001164 * adapter in watchdog
1165 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001166 if (netif_carrier_ok(netdev) &&
1167 adapter->flags & FLAG_RX_NEEDS_RESTART) {
1168 /* disable receives */
1169 u32 rctl = er32(RCTL);
1170 ew32(RCTL, rctl & ~E1000_RCTL_EN);
Jeff Kirsher318a94d2008-03-28 09:15:16 -07001171 adapter->flags |= FLAG_RX_RESTART_NOW;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001172 }
1173 /* guard against interrupt when we're going down */
1174 if (!test_bit(__E1000_DOWN, &adapter->state))
1175 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1176 }
1177
Ben Hutchings288379f2009-01-19 16:43:59 -08001178 if (napi_schedule_prep(&adapter->napi)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07001179 adapter->total_tx_bytes = 0;
1180 adapter->total_tx_packets = 0;
1181 adapter->total_rx_bytes = 0;
1182 adapter->total_rx_packets = 0;
Ben Hutchings288379f2009-01-19 16:43:59 -08001183 __napi_schedule(&adapter->napi);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001184 }
1185
1186 return IRQ_HANDLED;
1187}
1188
1189/**
1190 * e1000_intr - Interrupt Handler
1191 * @irq: interrupt number
1192 * @data: pointer to a network interface device structure
1193 **/
1194static irqreturn_t e1000_intr(int irq, void *data)
1195{
1196 struct net_device *netdev = data;
1197 struct e1000_adapter *adapter = netdev_priv(netdev);
1198 struct e1000_hw *hw = &adapter->hw;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001199 u32 rctl, icr = er32(ICR);
Bruce Allan4662e822008-08-26 18:37:06 -07001200
Auke Kokbc7f75f2007-09-17 12:30:59 -07001201 if (!icr)
1202 return IRQ_NONE; /* Not our interrupt */
1203
Bruce Allanad680762008-03-28 09:15:03 -07001204 /*
1205 * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1206 * not set, then the adapter didn't send an interrupt
1207 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001208 if (!(icr & E1000_ICR_INT_ASSERTED))
1209 return IRQ_NONE;
1210
Bruce Allanad680762008-03-28 09:15:03 -07001211 /*
1212 * Interrupt Auto-Mask...upon reading ICR,
1213 * interrupts are masked. No need for the
1214 * IMC write
1215 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001216
dave graham573cca82009-02-10 12:52:05 +00001217 if (icr & E1000_ICR_LSC) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07001218 hw->mac.get_link_status = 1;
Bruce Allanad680762008-03-28 09:15:03 -07001219 /*
1220 * ICH8 workaround-- Call gig speed drop workaround on cable
1221 * disconnect (LSC) before accessing any PHY registers
1222 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001223 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1224 (!(er32(STATUS) & E1000_STATUS_LU)))
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07001225 schedule_work(&adapter->downshift_task);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001226
Bruce Allanad680762008-03-28 09:15:03 -07001227 /*
1228 * 80003ES2LAN workaround--
Auke Kokbc7f75f2007-09-17 12:30:59 -07001229 * For packet buffer work-around on link down event;
1230 * disable receives here in the ISR and
1231 * reset adapter in watchdog
1232 */
1233 if (netif_carrier_ok(netdev) &&
1234 (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1235 /* disable receives */
1236 rctl = er32(RCTL);
1237 ew32(RCTL, rctl & ~E1000_RCTL_EN);
Jeff Kirsher318a94d2008-03-28 09:15:16 -07001238 adapter->flags |= FLAG_RX_RESTART_NOW;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001239 }
1240 /* guard against interrupt when we're going down */
1241 if (!test_bit(__E1000_DOWN, &adapter->state))
1242 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1243 }
1244
Ben Hutchings288379f2009-01-19 16:43:59 -08001245 if (napi_schedule_prep(&adapter->napi)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07001246 adapter->total_tx_bytes = 0;
1247 adapter->total_tx_packets = 0;
1248 adapter->total_rx_bytes = 0;
1249 adapter->total_rx_packets = 0;
Ben Hutchings288379f2009-01-19 16:43:59 -08001250 __napi_schedule(&adapter->napi);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001251 }
1252
1253 return IRQ_HANDLED;
1254}
1255
Bruce Allan4662e822008-08-26 18:37:06 -07001256static irqreturn_t e1000_msix_other(int irq, void *data)
1257{
1258 struct net_device *netdev = data;
1259 struct e1000_adapter *adapter = netdev_priv(netdev);
1260 struct e1000_hw *hw = &adapter->hw;
1261 u32 icr = er32(ICR);
1262
1263 if (!(icr & E1000_ICR_INT_ASSERTED)) {
1264 ew32(IMS, E1000_IMS_OTHER);
1265 return IRQ_NONE;
1266 }
1267
1268 if (icr & adapter->eiac_mask)
1269 ew32(ICS, (icr & adapter->eiac_mask));
1270
1271 if (icr & E1000_ICR_OTHER) {
1272 if (!(icr & E1000_ICR_LSC))
1273 goto no_link_interrupt;
1274 hw->mac.get_link_status = 1;
1275 /* guard against interrupt when we're going down */
1276 if (!test_bit(__E1000_DOWN, &adapter->state))
1277 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1278 }
1279
1280no_link_interrupt:
1281 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1282
1283 return IRQ_HANDLED;
1284}
1285
1286
1287static irqreturn_t e1000_intr_msix_tx(int irq, void *data)
1288{
1289 struct net_device *netdev = data;
1290 struct e1000_adapter *adapter = netdev_priv(netdev);
1291 struct e1000_hw *hw = &adapter->hw;
1292 struct e1000_ring *tx_ring = adapter->tx_ring;
1293
1294
1295 adapter->total_tx_bytes = 0;
1296 adapter->total_tx_packets = 0;
1297
1298 if (!e1000_clean_tx_irq(adapter))
1299 /* Ring was not completely cleaned, so fire another interrupt */
1300 ew32(ICS, tx_ring->ims_val);
1301
1302 return IRQ_HANDLED;
1303}
1304
1305static irqreturn_t e1000_intr_msix_rx(int irq, void *data)
1306{
1307 struct net_device *netdev = data;
1308 struct e1000_adapter *adapter = netdev_priv(netdev);
1309
1310 /* Write the ITR value calculated at the end of the
1311 * previous interrupt.
1312 */
1313 if (adapter->rx_ring->set_itr) {
1314 writel(1000000000 / (adapter->rx_ring->itr_val * 256),
1315 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
1316 adapter->rx_ring->set_itr = 0;
1317 }
1318
Ben Hutchings288379f2009-01-19 16:43:59 -08001319 if (napi_schedule_prep(&adapter->napi)) {
Bruce Allan4662e822008-08-26 18:37:06 -07001320 adapter->total_rx_bytes = 0;
1321 adapter->total_rx_packets = 0;
Ben Hutchings288379f2009-01-19 16:43:59 -08001322 __napi_schedule(&adapter->napi);
Bruce Allan4662e822008-08-26 18:37:06 -07001323 }
1324 return IRQ_HANDLED;
1325}
1326
1327/**
1328 * e1000_configure_msix - Configure MSI-X hardware
1329 *
1330 * e1000_configure_msix sets up the hardware to properly
1331 * generate MSI-X interrupts.
1332 **/
1333static void e1000_configure_msix(struct e1000_adapter *adapter)
1334{
1335 struct e1000_hw *hw = &adapter->hw;
1336 struct e1000_ring *rx_ring = adapter->rx_ring;
1337 struct e1000_ring *tx_ring = adapter->tx_ring;
1338 int vector = 0;
1339 u32 ctrl_ext, ivar = 0;
1340
1341 adapter->eiac_mask = 0;
1342
1343 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1344 if (hw->mac.type == e1000_82574) {
1345 u32 rfctl = er32(RFCTL);
1346 rfctl |= E1000_RFCTL_ACK_DIS;
1347 ew32(RFCTL, rfctl);
1348 }
1349
1350#define E1000_IVAR_INT_ALLOC_VALID 0x8
1351 /* Configure Rx vector */
1352 rx_ring->ims_val = E1000_IMS_RXQ0;
1353 adapter->eiac_mask |= rx_ring->ims_val;
1354 if (rx_ring->itr_val)
1355 writel(1000000000 / (rx_ring->itr_val * 256),
1356 hw->hw_addr + rx_ring->itr_register);
1357 else
1358 writel(1, hw->hw_addr + rx_ring->itr_register);
1359 ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1360
1361 /* Configure Tx vector */
1362 tx_ring->ims_val = E1000_IMS_TXQ0;
1363 vector++;
1364 if (tx_ring->itr_val)
1365 writel(1000000000 / (tx_ring->itr_val * 256),
1366 hw->hw_addr + tx_ring->itr_register);
1367 else
1368 writel(1, hw->hw_addr + tx_ring->itr_register);
1369 adapter->eiac_mask |= tx_ring->ims_val;
1370 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1371
1372 /* set vector for Other Causes, e.g. link changes */
1373 vector++;
1374 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1375 if (rx_ring->itr_val)
1376 writel(1000000000 / (rx_ring->itr_val * 256),
1377 hw->hw_addr + E1000_EITR_82574(vector));
1378 else
1379 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
1380
1381 /* Cause Tx interrupts on every write back */
1382 ivar |= (1 << 31);
1383
1384 ew32(IVAR, ivar);
1385
1386 /* enable MSI-X PBA support */
1387 ctrl_ext = er32(CTRL_EXT);
1388 ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
1389
1390 /* Auto-Mask Other interrupts upon ICR read */
1391#define E1000_EIAC_MASK_82574 0x01F00000
1392 ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
1393 ctrl_ext |= E1000_CTRL_EXT_EIAME;
1394 ew32(CTRL_EXT, ctrl_ext);
1395 e1e_flush();
1396}
1397
1398void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
1399{
1400 if (adapter->msix_entries) {
1401 pci_disable_msix(adapter->pdev);
1402 kfree(adapter->msix_entries);
1403 adapter->msix_entries = NULL;
1404 } else if (adapter->flags & FLAG_MSI_ENABLED) {
1405 pci_disable_msi(adapter->pdev);
1406 adapter->flags &= ~FLAG_MSI_ENABLED;
1407 }
1408
1409 return;
1410}
1411
1412/**
1413 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1414 *
1415 * Attempt to configure interrupts using the best available
1416 * capabilities of the hardware and kernel.
1417 **/
1418void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
1419{
1420 int err;
1421 int numvecs, i;
1422
1423
1424 switch (adapter->int_mode) {
1425 case E1000E_INT_MODE_MSIX:
1426 if (adapter->flags & FLAG_HAS_MSIX) {
1427 numvecs = 3; /* RxQ0, TxQ0 and other */
1428 adapter->msix_entries = kcalloc(numvecs,
1429 sizeof(struct msix_entry),
1430 GFP_KERNEL);
1431 if (adapter->msix_entries) {
1432 for (i = 0; i < numvecs; i++)
1433 adapter->msix_entries[i].entry = i;
1434
1435 err = pci_enable_msix(adapter->pdev,
1436 adapter->msix_entries,
1437 numvecs);
1438 if (err == 0)
1439 return;
1440 }
1441 /* MSI-X failed, so fall through and try MSI */
1442 e_err("Failed to initialize MSI-X interrupts. "
1443 "Falling back to MSI interrupts.\n");
1444 e1000e_reset_interrupt_capability(adapter);
1445 }
1446 adapter->int_mode = E1000E_INT_MODE_MSI;
1447 /* Fall through */
1448 case E1000E_INT_MODE_MSI:
1449 if (!pci_enable_msi(adapter->pdev)) {
1450 adapter->flags |= FLAG_MSI_ENABLED;
1451 } else {
1452 adapter->int_mode = E1000E_INT_MODE_LEGACY;
1453 e_err("Failed to initialize MSI interrupts. Falling "
1454 "back to legacy interrupts.\n");
1455 }
1456 /* Fall through */
1457 case E1000E_INT_MODE_LEGACY:
1458 /* Don't do anything; this is the system default */
1459 break;
1460 }
1461
1462 return;
1463}
1464
1465/**
1466 * e1000_request_msix - Initialize MSI-X interrupts
1467 *
1468 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1469 * kernel.
1470 **/
1471static int e1000_request_msix(struct e1000_adapter *adapter)
1472{
1473 struct net_device *netdev = adapter->netdev;
1474 int err = 0, vector = 0;
1475
1476 if (strlen(netdev->name) < (IFNAMSIZ - 5))
Alexander Duyckcb7b48f2008-12-05 15:08:03 -08001477 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
Bruce Allan4662e822008-08-26 18:37:06 -07001478 else
1479 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1480 err = request_irq(adapter->msix_entries[vector].vector,
1481 &e1000_intr_msix_rx, 0, adapter->rx_ring->name,
1482 netdev);
1483 if (err)
1484 goto out;
1485 adapter->rx_ring->itr_register = E1000_EITR_82574(vector);
1486 adapter->rx_ring->itr_val = adapter->itr;
1487 vector++;
1488
1489 if (strlen(netdev->name) < (IFNAMSIZ - 5))
Alexander Duyckcb7b48f2008-12-05 15:08:03 -08001490 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
Bruce Allan4662e822008-08-26 18:37:06 -07001491 else
1492 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1493 err = request_irq(adapter->msix_entries[vector].vector,
1494 &e1000_intr_msix_tx, 0, adapter->tx_ring->name,
1495 netdev);
1496 if (err)
1497 goto out;
1498 adapter->tx_ring->itr_register = E1000_EITR_82574(vector);
1499 adapter->tx_ring->itr_val = adapter->itr;
1500 vector++;
1501
1502 err = request_irq(adapter->msix_entries[vector].vector,
1503 &e1000_msix_other, 0, netdev->name, netdev);
1504 if (err)
1505 goto out;
1506
1507 e1000_configure_msix(adapter);
1508 return 0;
1509out:
1510 return err;
1511}
1512
Bruce Allanf8d59f72008-08-08 18:36:11 -07001513/**
1514 * e1000_request_irq - initialize interrupts
1515 *
1516 * Attempts to configure interrupts using the best available
1517 * capabilities of the hardware and kernel.
1518 **/
Auke Kokbc7f75f2007-09-17 12:30:59 -07001519static int e1000_request_irq(struct e1000_adapter *adapter)
1520{
1521 struct net_device *netdev = adapter->netdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001522 int err;
1523
Bruce Allan4662e822008-08-26 18:37:06 -07001524 if (adapter->msix_entries) {
1525 err = e1000_request_msix(adapter);
1526 if (!err)
1527 return err;
1528 /* fall back to MSI */
1529 e1000e_reset_interrupt_capability(adapter);
1530 adapter->int_mode = E1000E_INT_MODE_MSI;
1531 e1000e_set_interrupt_capability(adapter);
1532 }
1533 if (adapter->flags & FLAG_MSI_ENABLED) {
1534 err = request_irq(adapter->pdev->irq, &e1000_intr_msi, 0,
1535 netdev->name, netdev);
1536 if (!err)
1537 return err;
1538
1539 /* fall back to legacy interrupt */
1540 e1000e_reset_interrupt_capability(adapter);
1541 adapter->int_mode = E1000E_INT_MODE_LEGACY;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001542 }
1543
Bruce Allan4662e822008-08-26 18:37:06 -07001544 err = request_irq(adapter->pdev->irq, &e1000_intr, IRQF_SHARED,
1545 netdev->name, netdev);
1546 if (err)
Bruce Allanf8d59f72008-08-08 18:36:11 -07001547 e_err("Unable to allocate interrupt, Error: %d\n", err);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001548
1549 return err;
1550}
1551
1552static void e1000_free_irq(struct e1000_adapter *adapter)
1553{
1554 struct net_device *netdev = adapter->netdev;
1555
Bruce Allan4662e822008-08-26 18:37:06 -07001556 if (adapter->msix_entries) {
1557 int vector = 0;
1558
1559 free_irq(adapter->msix_entries[vector].vector, netdev);
1560 vector++;
1561
1562 free_irq(adapter->msix_entries[vector].vector, netdev);
1563 vector++;
1564
1565 /* Other Causes interrupt vector */
1566 free_irq(adapter->msix_entries[vector].vector, netdev);
1567 return;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001568 }
Bruce Allan4662e822008-08-26 18:37:06 -07001569
1570 free_irq(adapter->pdev->irq, netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001571}
1572
1573/**
1574 * e1000_irq_disable - Mask off interrupt generation on the NIC
1575 **/
1576static void e1000_irq_disable(struct e1000_adapter *adapter)
1577{
1578 struct e1000_hw *hw = &adapter->hw;
1579
Auke Kokbc7f75f2007-09-17 12:30:59 -07001580 ew32(IMC, ~0);
Bruce Allan4662e822008-08-26 18:37:06 -07001581 if (adapter->msix_entries)
1582 ew32(EIAC_82574, 0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001583 e1e_flush();
1584 synchronize_irq(adapter->pdev->irq);
1585}
1586
1587/**
1588 * e1000_irq_enable - Enable default interrupt generation settings
1589 **/
1590static void e1000_irq_enable(struct e1000_adapter *adapter)
1591{
1592 struct e1000_hw *hw = &adapter->hw;
1593
Bruce Allan4662e822008-08-26 18:37:06 -07001594 if (adapter->msix_entries) {
1595 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
1596 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
1597 } else {
1598 ew32(IMS, IMS_ENABLE_MASK);
1599 }
Jesse Brandeburg74ef9c32008-03-21 11:06:52 -07001600 e1e_flush();
Auke Kokbc7f75f2007-09-17 12:30:59 -07001601}
1602
1603/**
1604 * e1000_get_hw_control - get control of the h/w from f/w
1605 * @adapter: address of board private structure
1606 *
Auke Kok489815c2008-02-21 15:11:07 -08001607 * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
Auke Kokbc7f75f2007-09-17 12:30:59 -07001608 * For ASF and Pass Through versions of f/w this means that
1609 * the driver is loaded. For AMT version (only with 82573)
1610 * of the f/w this means that the network i/f is open.
1611 **/
1612static void e1000_get_hw_control(struct e1000_adapter *adapter)
1613{
1614 struct e1000_hw *hw = &adapter->hw;
1615 u32 ctrl_ext;
1616 u32 swsm;
1617
1618 /* Let firmware know the driver has taken over */
1619 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1620 swsm = er32(SWSM);
1621 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
1622 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1623 ctrl_ext = er32(CTRL_EXT);
Bruce Allanad680762008-03-28 09:15:03 -07001624 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001625 }
1626}
1627
1628/**
1629 * e1000_release_hw_control - release control of the h/w to f/w
1630 * @adapter: address of board private structure
1631 *
Auke Kok489815c2008-02-21 15:11:07 -08001632 * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
Auke Kokbc7f75f2007-09-17 12:30:59 -07001633 * For ASF and Pass Through versions of f/w this means that the
1634 * driver is no longer loaded. For AMT version (only with 82573) i
1635 * of the f/w this means that the network i/f is closed.
1636 *
1637 **/
1638static void e1000_release_hw_control(struct e1000_adapter *adapter)
1639{
1640 struct e1000_hw *hw = &adapter->hw;
1641 u32 ctrl_ext;
1642 u32 swsm;
1643
1644 /* Let firmware taken over control of h/w */
1645 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1646 swsm = er32(SWSM);
1647 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
1648 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1649 ctrl_ext = er32(CTRL_EXT);
Bruce Allanad680762008-03-28 09:15:03 -07001650 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001651 }
1652}
1653
Auke Kokbc7f75f2007-09-17 12:30:59 -07001654/**
1655 * @e1000_alloc_ring - allocate memory for a ring structure
1656 **/
1657static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
1658 struct e1000_ring *ring)
1659{
1660 struct pci_dev *pdev = adapter->pdev;
1661
1662 ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
1663 GFP_KERNEL);
1664 if (!ring->desc)
1665 return -ENOMEM;
1666
1667 return 0;
1668}
1669
1670/**
1671 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
1672 * @adapter: board private structure
1673 *
1674 * Return 0 on success, negative on failure
1675 **/
1676int e1000e_setup_tx_resources(struct e1000_adapter *adapter)
1677{
1678 struct e1000_ring *tx_ring = adapter->tx_ring;
1679 int err = -ENOMEM, size;
1680
1681 size = sizeof(struct e1000_buffer) * tx_ring->count;
1682 tx_ring->buffer_info = vmalloc(size);
1683 if (!tx_ring->buffer_info)
1684 goto err;
1685 memset(tx_ring->buffer_info, 0, size);
1686
1687 /* round up to nearest 4K */
1688 tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
1689 tx_ring->size = ALIGN(tx_ring->size, 4096);
1690
1691 err = e1000_alloc_ring_dma(adapter, tx_ring);
1692 if (err)
1693 goto err;
1694
1695 tx_ring->next_to_use = 0;
1696 tx_ring->next_to_clean = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001697
1698 return 0;
1699err:
1700 vfree(tx_ring->buffer_info);
Jeff Kirsher44defeb2008-08-04 17:20:41 -07001701 e_err("Unable to allocate memory for the transmit descriptor ring\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07001702 return err;
1703}
1704
1705/**
1706 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
1707 * @adapter: board private structure
1708 *
1709 * Returns 0 on success, negative on failure
1710 **/
1711int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
1712{
1713 struct e1000_ring *rx_ring = adapter->rx_ring;
Auke Kok47f44e42007-10-25 13:57:44 -07001714 struct e1000_buffer *buffer_info;
1715 int i, size, desc_len, err = -ENOMEM;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001716
1717 size = sizeof(struct e1000_buffer) * rx_ring->count;
1718 rx_ring->buffer_info = vmalloc(size);
1719 if (!rx_ring->buffer_info)
1720 goto err;
1721 memset(rx_ring->buffer_info, 0, size);
1722
Auke Kok47f44e42007-10-25 13:57:44 -07001723 for (i = 0; i < rx_ring->count; i++) {
1724 buffer_info = &rx_ring->buffer_info[i];
1725 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
1726 sizeof(struct e1000_ps_page),
1727 GFP_KERNEL);
1728 if (!buffer_info->ps_pages)
1729 goto err_pages;
1730 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07001731
1732 desc_len = sizeof(union e1000_rx_desc_packet_split);
1733
1734 /* Round up to nearest 4K */
1735 rx_ring->size = rx_ring->count * desc_len;
1736 rx_ring->size = ALIGN(rx_ring->size, 4096);
1737
1738 err = e1000_alloc_ring_dma(adapter, rx_ring);
1739 if (err)
Auke Kok47f44e42007-10-25 13:57:44 -07001740 goto err_pages;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001741
1742 rx_ring->next_to_clean = 0;
1743 rx_ring->next_to_use = 0;
1744 rx_ring->rx_skb_top = NULL;
1745
1746 return 0;
Auke Kok47f44e42007-10-25 13:57:44 -07001747
1748err_pages:
1749 for (i = 0; i < rx_ring->count; i++) {
1750 buffer_info = &rx_ring->buffer_info[i];
1751 kfree(buffer_info->ps_pages);
1752 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07001753err:
1754 vfree(rx_ring->buffer_info);
Jeff Kirsher44defeb2008-08-04 17:20:41 -07001755 e_err("Unable to allocate memory for the transmit descriptor ring\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07001756 return err;
1757}
1758
1759/**
1760 * e1000_clean_tx_ring - Free Tx Buffers
1761 * @adapter: board private structure
1762 **/
1763static void e1000_clean_tx_ring(struct e1000_adapter *adapter)
1764{
1765 struct e1000_ring *tx_ring = adapter->tx_ring;
1766 struct e1000_buffer *buffer_info;
1767 unsigned long size;
1768 unsigned int i;
1769
1770 for (i = 0; i < tx_ring->count; i++) {
1771 buffer_info = &tx_ring->buffer_info[i];
1772 e1000_put_txbuf(adapter, buffer_info);
1773 }
1774
1775 size = sizeof(struct e1000_buffer) * tx_ring->count;
1776 memset(tx_ring->buffer_info, 0, size);
1777
1778 memset(tx_ring->desc, 0, tx_ring->size);
1779
1780 tx_ring->next_to_use = 0;
1781 tx_ring->next_to_clean = 0;
1782
1783 writel(0, adapter->hw.hw_addr + tx_ring->head);
1784 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1785}
1786
1787/**
1788 * e1000e_free_tx_resources - Free Tx Resources per Queue
1789 * @adapter: board private structure
1790 *
1791 * Free all transmit software resources
1792 **/
1793void e1000e_free_tx_resources(struct e1000_adapter *adapter)
1794{
1795 struct pci_dev *pdev = adapter->pdev;
1796 struct e1000_ring *tx_ring = adapter->tx_ring;
1797
1798 e1000_clean_tx_ring(adapter);
1799
1800 vfree(tx_ring->buffer_info);
1801 tx_ring->buffer_info = NULL;
1802
1803 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1804 tx_ring->dma);
1805 tx_ring->desc = NULL;
1806}
1807
1808/**
1809 * e1000e_free_rx_resources - Free Rx Resources
1810 * @adapter: board private structure
1811 *
1812 * Free all receive software resources
1813 **/
1814
1815void e1000e_free_rx_resources(struct e1000_adapter *adapter)
1816{
1817 struct pci_dev *pdev = adapter->pdev;
1818 struct e1000_ring *rx_ring = adapter->rx_ring;
Auke Kok47f44e42007-10-25 13:57:44 -07001819 int i;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001820
1821 e1000_clean_rx_ring(adapter);
1822
Auke Kok47f44e42007-10-25 13:57:44 -07001823 for (i = 0; i < rx_ring->count; i++) {
1824 kfree(rx_ring->buffer_info[i].ps_pages);
1825 }
1826
Auke Kokbc7f75f2007-09-17 12:30:59 -07001827 vfree(rx_ring->buffer_info);
1828 rx_ring->buffer_info = NULL;
1829
Auke Kokbc7f75f2007-09-17 12:30:59 -07001830 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1831 rx_ring->dma);
1832 rx_ring->desc = NULL;
1833}
1834
1835/**
1836 * e1000_update_itr - update the dynamic ITR value based on statistics
Auke Kok489815c2008-02-21 15:11:07 -08001837 * @adapter: pointer to adapter
1838 * @itr_setting: current adapter->itr
1839 * @packets: the number of packets during this measurement interval
1840 * @bytes: the number of bytes during this measurement interval
1841 *
Auke Kokbc7f75f2007-09-17 12:30:59 -07001842 * Stores a new ITR value based on packets and byte
1843 * counts during the last interrupt. The advantage of per interrupt
1844 * computation is faster updates and more accurate ITR for the current
1845 * traffic pattern. Constants in this function were computed
1846 * based on theoretical maximum wire speed and thresholds were set based
1847 * on testing data as well as attempting to minimize response time
Bruce Allan4662e822008-08-26 18:37:06 -07001848 * while increasing bulk throughput. This functionality is controlled
1849 * by the InterruptThrottleRate module parameter.
Auke Kokbc7f75f2007-09-17 12:30:59 -07001850 **/
1851static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
1852 u16 itr_setting, int packets,
1853 int bytes)
1854{
1855 unsigned int retval = itr_setting;
1856
1857 if (packets == 0)
1858 goto update_itr_done;
1859
1860 switch (itr_setting) {
1861 case lowest_latency:
1862 /* handle TSO and jumbo frames */
1863 if (bytes/packets > 8000)
1864 retval = bulk_latency;
1865 else if ((packets < 5) && (bytes > 512)) {
1866 retval = low_latency;
1867 }
1868 break;
1869 case low_latency: /* 50 usec aka 20000 ints/s */
1870 if (bytes > 10000) {
1871 /* this if handles the TSO accounting */
1872 if (bytes/packets > 8000) {
1873 retval = bulk_latency;
1874 } else if ((packets < 10) || ((bytes/packets) > 1200)) {
1875 retval = bulk_latency;
1876 } else if ((packets > 35)) {
1877 retval = lowest_latency;
1878 }
1879 } else if (bytes/packets > 2000) {
1880 retval = bulk_latency;
1881 } else if (packets <= 2 && bytes < 512) {
1882 retval = lowest_latency;
1883 }
1884 break;
1885 case bulk_latency: /* 250 usec aka 4000 ints/s */
1886 if (bytes > 25000) {
1887 if (packets > 35) {
1888 retval = low_latency;
1889 }
1890 } else if (bytes < 6000) {
1891 retval = low_latency;
1892 }
1893 break;
1894 }
1895
1896update_itr_done:
1897 return retval;
1898}
1899
1900static void e1000_set_itr(struct e1000_adapter *adapter)
1901{
1902 struct e1000_hw *hw = &adapter->hw;
1903 u16 current_itr;
1904 u32 new_itr = adapter->itr;
1905
1906 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
1907 if (adapter->link_speed != SPEED_1000) {
1908 current_itr = 0;
1909 new_itr = 4000;
1910 goto set_itr_now;
1911 }
1912
1913 adapter->tx_itr = e1000_update_itr(adapter,
1914 adapter->tx_itr,
1915 adapter->total_tx_packets,
1916 adapter->total_tx_bytes);
1917 /* conservative mode (itr 3) eliminates the lowest_latency setting */
1918 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
1919 adapter->tx_itr = low_latency;
1920
1921 adapter->rx_itr = e1000_update_itr(adapter,
1922 adapter->rx_itr,
1923 adapter->total_rx_packets,
1924 adapter->total_rx_bytes);
1925 /* conservative mode (itr 3) eliminates the lowest_latency setting */
1926 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
1927 adapter->rx_itr = low_latency;
1928
1929 current_itr = max(adapter->rx_itr, adapter->tx_itr);
1930
1931 switch (current_itr) {
1932 /* counts and packets in update_itr are dependent on these numbers */
1933 case lowest_latency:
1934 new_itr = 70000;
1935 break;
1936 case low_latency:
1937 new_itr = 20000; /* aka hwitr = ~200 */
1938 break;
1939 case bulk_latency:
1940 new_itr = 4000;
1941 break;
1942 default:
1943 break;
1944 }
1945
1946set_itr_now:
1947 if (new_itr != adapter->itr) {
Bruce Allanad680762008-03-28 09:15:03 -07001948 /*
1949 * this attempts to bias the interrupt rate towards Bulk
Auke Kokbc7f75f2007-09-17 12:30:59 -07001950 * by adding intermediate steps when interrupt rate is
Bruce Allanad680762008-03-28 09:15:03 -07001951 * increasing
1952 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001953 new_itr = new_itr > adapter->itr ?
1954 min(adapter->itr + (new_itr >> 2), new_itr) :
1955 new_itr;
1956 adapter->itr = new_itr;
Bruce Allan4662e822008-08-26 18:37:06 -07001957 adapter->rx_ring->itr_val = new_itr;
1958 if (adapter->msix_entries)
1959 adapter->rx_ring->set_itr = 1;
1960 else
1961 ew32(ITR, 1000000000 / (new_itr * 256));
Auke Kokbc7f75f2007-09-17 12:30:59 -07001962 }
1963}
1964
1965/**
Bruce Allan4662e822008-08-26 18:37:06 -07001966 * e1000_alloc_queues - Allocate memory for all rings
1967 * @adapter: board private structure to initialize
1968 **/
1969static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1970{
1971 adapter->tx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
1972 if (!adapter->tx_ring)
1973 goto err;
1974
1975 adapter->rx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
1976 if (!adapter->rx_ring)
1977 goto err;
1978
1979 return 0;
1980err:
1981 e_err("Unable to allocate memory for queues\n");
1982 kfree(adapter->rx_ring);
1983 kfree(adapter->tx_ring);
1984 return -ENOMEM;
1985}
1986
1987/**
Auke Kokbc7f75f2007-09-17 12:30:59 -07001988 * e1000_clean - NAPI Rx polling callback
Bruce Allanad680762008-03-28 09:15:03 -07001989 * @napi: struct associated with this polling callback
Auke Kok489815c2008-02-21 15:11:07 -08001990 * @budget: amount of packets driver is allowed to process this poll
Auke Kokbc7f75f2007-09-17 12:30:59 -07001991 **/
1992static int e1000_clean(struct napi_struct *napi, int budget)
1993{
1994 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
Bruce Allan4662e822008-08-26 18:37:06 -07001995 struct e1000_hw *hw = &adapter->hw;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001996 struct net_device *poll_dev = adapter->netdev;
David S. Millerd2c7ddd2008-01-15 22:43:24 -08001997 int tx_cleaned = 0, work_done = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001998
Wang Chen4cf16532008-11-12 23:38:14 -08001999 adapter = netdev_priv(poll_dev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002000
Bruce Allan4662e822008-08-26 18:37:06 -07002001 if (adapter->msix_entries &&
2002 !(adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2003 goto clean_rx;
2004
Jesse Brandeburg92af3e92009-01-19 14:17:08 +00002005 tx_cleaned = e1000_clean_tx_irq(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002006
Bruce Allan4662e822008-08-26 18:37:06 -07002007clean_rx:
Auke Kokbc7f75f2007-09-17 12:30:59 -07002008 adapter->clean_rx(adapter, &work_done, budget);
2009
Alexander Duyck12d04a32009-03-25 22:05:03 +00002010 if (!tx_cleaned)
David S. Millerd2c7ddd2008-01-15 22:43:24 -08002011 work_done = budget;
2012
David S. Miller53e52c72008-01-07 21:06:12 -08002013 /* If budget not fully consumed, exit the polling mode */
2014 if (work_done < budget) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07002015 if (adapter->itr_setting & 3)
2016 e1000_set_itr(adapter);
Ben Hutchings288379f2009-01-19 16:43:59 -08002017 napi_complete(napi);
Bruce Allan4662e822008-08-26 18:37:06 -07002018 if (adapter->msix_entries)
2019 ew32(IMS, adapter->rx_ring->ims_val);
2020 else
2021 e1000_irq_enable(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002022 }
2023
2024 return work_done;
2025}
2026
2027static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2028{
2029 struct e1000_adapter *adapter = netdev_priv(netdev);
2030 struct e1000_hw *hw = &adapter->hw;
2031 u32 vfta, index;
2032
2033 /* don't update vlan cookie if already programmed */
2034 if ((adapter->hw.mng_cookie.status &
2035 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2036 (vid == adapter->mng_vlan_id))
2037 return;
2038 /* add VID to filter table */
2039 index = (vid >> 5) & 0x7F;
2040 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2041 vfta |= (1 << (vid & 0x1F));
2042 e1000e_write_vfta(hw, index, vfta);
2043}
2044
2045static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2046{
2047 struct e1000_adapter *adapter = netdev_priv(netdev);
2048 struct e1000_hw *hw = &adapter->hw;
2049 u32 vfta, index;
2050
Jesse Brandeburg74ef9c32008-03-21 11:06:52 -07002051 if (!test_bit(__E1000_DOWN, &adapter->state))
2052 e1000_irq_disable(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002053 vlan_group_set_device(adapter->vlgrp, vid, NULL);
Jesse Brandeburg74ef9c32008-03-21 11:06:52 -07002054
2055 if (!test_bit(__E1000_DOWN, &adapter->state))
2056 e1000_irq_enable(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002057
2058 if ((adapter->hw.mng_cookie.status &
2059 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2060 (vid == adapter->mng_vlan_id)) {
2061 /* release control to f/w */
2062 e1000_release_hw_control(adapter);
2063 return;
2064 }
2065
2066 /* remove VID from filter table */
2067 index = (vid >> 5) & 0x7F;
2068 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2069 vfta &= ~(1 << (vid & 0x1F));
2070 e1000e_write_vfta(hw, index, vfta);
2071}
2072
2073static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2074{
2075 struct net_device *netdev = adapter->netdev;
2076 u16 vid = adapter->hw.mng_cookie.vlan_id;
2077 u16 old_vid = adapter->mng_vlan_id;
2078
2079 if (!adapter->vlgrp)
2080 return;
2081
2082 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
2083 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2084 if (adapter->hw.mng_cookie.status &
2085 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2086 e1000_vlan_rx_add_vid(netdev, vid);
2087 adapter->mng_vlan_id = vid;
2088 }
2089
2090 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
2091 (vid != old_vid) &&
2092 !vlan_group_get_device(adapter->vlgrp, old_vid))
2093 e1000_vlan_rx_kill_vid(netdev, old_vid);
2094 } else {
2095 adapter->mng_vlan_id = vid;
2096 }
2097}
2098
2099
2100static void e1000_vlan_rx_register(struct net_device *netdev,
2101 struct vlan_group *grp)
2102{
2103 struct e1000_adapter *adapter = netdev_priv(netdev);
2104 struct e1000_hw *hw = &adapter->hw;
2105 u32 ctrl, rctl;
2106
Jesse Brandeburg74ef9c32008-03-21 11:06:52 -07002107 if (!test_bit(__E1000_DOWN, &adapter->state))
2108 e1000_irq_disable(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002109 adapter->vlgrp = grp;
2110
2111 if (grp) {
2112 /* enable VLAN tag insert/strip */
2113 ctrl = er32(CTRL);
2114 ctrl |= E1000_CTRL_VME;
2115 ew32(CTRL, ctrl);
2116
2117 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2118 /* enable VLAN receive filtering */
2119 rctl = er32(RCTL);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002120 rctl &= ~E1000_RCTL_CFIEN;
2121 ew32(RCTL, rctl);
2122 e1000_update_mng_vlan(adapter);
2123 }
2124 } else {
2125 /* disable VLAN tag insert/strip */
2126 ctrl = er32(CTRL);
2127 ctrl &= ~E1000_CTRL_VME;
2128 ew32(CTRL, ctrl);
2129
2130 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07002131 if (adapter->mng_vlan_id !=
2132 (u16)E1000_MNG_VLAN_NONE) {
2133 e1000_vlan_rx_kill_vid(netdev,
2134 adapter->mng_vlan_id);
2135 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2136 }
2137 }
2138 }
2139
Jesse Brandeburg74ef9c32008-03-21 11:06:52 -07002140 if (!test_bit(__E1000_DOWN, &adapter->state))
2141 e1000_irq_enable(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002142}
2143
2144static void e1000_restore_vlan(struct e1000_adapter *adapter)
2145{
2146 u16 vid;
2147
2148 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2149
2150 if (!adapter->vlgrp)
2151 return;
2152
2153 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2154 if (!vlan_group_get_device(adapter->vlgrp, vid))
2155 continue;
2156 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2157 }
2158}
2159
2160static void e1000_init_manageability(struct e1000_adapter *adapter)
2161{
2162 struct e1000_hw *hw = &adapter->hw;
2163 u32 manc, manc2h;
2164
2165 if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2166 return;
2167
2168 manc = er32(MANC);
2169
Bruce Allanad680762008-03-28 09:15:03 -07002170 /*
2171 * enable receiving management packets to the host. this will probably
Auke Kokbc7f75f2007-09-17 12:30:59 -07002172 * generate destination unreachable messages from the host OS, but
Bruce Allanad680762008-03-28 09:15:03 -07002173 * the packets will be handled on SMBUS
2174 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002175 manc |= E1000_MANC_EN_MNG2HOST;
2176 manc2h = er32(MANC2H);
2177#define E1000_MNG2HOST_PORT_623 (1 << 5)
2178#define E1000_MNG2HOST_PORT_664 (1 << 6)
2179 manc2h |= E1000_MNG2HOST_PORT_623;
2180 manc2h |= E1000_MNG2HOST_PORT_664;
2181 ew32(MANC2H, manc2h);
2182 ew32(MANC, manc);
2183}
2184
2185/**
2186 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
2187 * @adapter: board private structure
2188 *
2189 * Configure the Tx unit of the MAC after a reset.
2190 **/
2191static void e1000_configure_tx(struct e1000_adapter *adapter)
2192{
2193 struct e1000_hw *hw = &adapter->hw;
2194 struct e1000_ring *tx_ring = adapter->tx_ring;
2195 u64 tdba;
2196 u32 tdlen, tctl, tipg, tarc;
2197 u32 ipgr1, ipgr2;
2198
2199 /* Setup the HW Tx Head and Tail descriptor pointers */
2200 tdba = tx_ring->dma;
2201 tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2202 ew32(TDBAL, (tdba & DMA_32BIT_MASK));
2203 ew32(TDBAH, (tdba >> 32));
2204 ew32(TDLEN, tdlen);
2205 ew32(TDH, 0);
2206 ew32(TDT, 0);
2207 tx_ring->head = E1000_TDH;
2208 tx_ring->tail = E1000_TDT;
2209
2210 /* Set the default values for the Tx Inter Packet Gap timer */
2211 tipg = DEFAULT_82543_TIPG_IPGT_COPPER; /* 8 */
2212 ipgr1 = DEFAULT_82543_TIPG_IPGR1; /* 8 */
2213 ipgr2 = DEFAULT_82543_TIPG_IPGR2; /* 6 */
2214
2215 if (adapter->flags & FLAG_TIPG_MEDIUM_FOR_80003ESLAN)
2216 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; /* 7 */
2217
2218 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
2219 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
2220 ew32(TIPG, tipg);
2221
2222 /* Set the Tx Interrupt Delay register */
2223 ew32(TIDV, adapter->tx_int_delay);
Bruce Allanad680762008-03-28 09:15:03 -07002224 /* Tx irq moderation */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002225 ew32(TADV, adapter->tx_abs_int_delay);
2226
2227 /* Program the Transmit Control Register */
2228 tctl = er32(TCTL);
2229 tctl &= ~E1000_TCTL_CT;
2230 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2231 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2232
2233 if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07002234 tarc = er32(TARC(0));
Bruce Allanad680762008-03-28 09:15:03 -07002235 /*
2236 * set the speed mode bit, we'll clear it if we're not at
2237 * gigabit link later
2238 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002239#define SPEED_MODE_BIT (1 << 21)
2240 tarc |= SPEED_MODE_BIT;
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07002241 ew32(TARC(0), tarc);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002242 }
2243
2244 /* errata: program both queues to unweighted RR */
2245 if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07002246 tarc = er32(TARC(0));
Auke Kokbc7f75f2007-09-17 12:30:59 -07002247 tarc |= 1;
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07002248 ew32(TARC(0), tarc);
2249 tarc = er32(TARC(1));
Auke Kokbc7f75f2007-09-17 12:30:59 -07002250 tarc |= 1;
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07002251 ew32(TARC(1), tarc);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002252 }
2253
2254 e1000e_config_collision_dist(hw);
2255
2256 /* Setup Transmit Descriptor Settings for eop descriptor */
2257 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2258
2259 /* only set IDE if we are delaying interrupts using the timers */
2260 if (adapter->tx_int_delay)
2261 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2262
2263 /* enable Report Status bit */
2264 adapter->txd_cmd |= E1000_TXD_CMD_RS;
2265
2266 ew32(TCTL, tctl);
2267
2268 adapter->tx_queue_len = adapter->netdev->tx_queue_len;
2269}
2270
2271/**
2272 * e1000_setup_rctl - configure the receive control registers
2273 * @adapter: Board private structure
2274 **/
2275#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2276 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2277static void e1000_setup_rctl(struct e1000_adapter *adapter)
2278{
2279 struct e1000_hw *hw = &adapter->hw;
2280 u32 rctl, rfctl;
2281 u32 psrctl = 0;
2282 u32 pages = 0;
2283
2284 /* Program MC offset vector base */
2285 rctl = er32(RCTL);
2286 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2287 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
2288 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
2289 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2290
2291 /* Do not Store bad packets */
2292 rctl &= ~E1000_RCTL_SBP;
2293
2294 /* Enable Long Packet receive */
2295 if (adapter->netdev->mtu <= ETH_DATA_LEN)
2296 rctl &= ~E1000_RCTL_LPE;
2297 else
2298 rctl |= E1000_RCTL_LPE;
2299
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +00002300 /* Some systems expect that the CRC is included in SMBUS traffic. The
2301 * hardware strips the CRC before sending to both SMBUS (BMC) and to
2302 * host memory when this is enabled
2303 */
2304 if (adapter->flags2 & FLAG2_CRC_STRIPPING)
2305 rctl |= E1000_RCTL_SECRC;
Auke Kok5918bd82008-02-12 15:20:24 -08002306
Auke Kokbc7f75f2007-09-17 12:30:59 -07002307 /* Setup buffer sizes */
2308 rctl &= ~E1000_RCTL_SZ_4096;
2309 rctl |= E1000_RCTL_BSEX;
2310 switch (adapter->rx_buffer_len) {
2311 case 256:
2312 rctl |= E1000_RCTL_SZ_256;
2313 rctl &= ~E1000_RCTL_BSEX;
2314 break;
2315 case 512:
2316 rctl |= E1000_RCTL_SZ_512;
2317 rctl &= ~E1000_RCTL_BSEX;
2318 break;
2319 case 1024:
2320 rctl |= E1000_RCTL_SZ_1024;
2321 rctl &= ~E1000_RCTL_BSEX;
2322 break;
2323 case 2048:
2324 default:
2325 rctl |= E1000_RCTL_SZ_2048;
2326 rctl &= ~E1000_RCTL_BSEX;
2327 break;
2328 case 4096:
2329 rctl |= E1000_RCTL_SZ_4096;
2330 break;
2331 case 8192:
2332 rctl |= E1000_RCTL_SZ_8192;
2333 break;
2334 case 16384:
2335 rctl |= E1000_RCTL_SZ_16384;
2336 break;
2337 }
2338
2339 /*
2340 * 82571 and greater support packet-split where the protocol
2341 * header is placed in skb->data and the packet data is
2342 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2343 * In the case of a non-split, skb->data is linearly filled,
2344 * followed by the page buffers. Therefore, skb->data is
2345 * sized to hold the largest protocol header.
2346 *
2347 * allocations using alloc_page take too long for regular MTU
2348 * so only enable packet split for jumbo frames
2349 *
2350 * Using pages when the page size is greater than 16k wastes
2351 * a lot of memory, since we allocate 3 pages at all times
2352 * per packet.
2353 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002354 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07002355 if (!(adapter->flags & FLAG_IS_ICH) && (pages <= 3) &&
2356 (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
Auke Kokbc7f75f2007-09-17 12:30:59 -07002357 adapter->rx_ps_pages = pages;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07002358 else
2359 adapter->rx_ps_pages = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002360
2361 if (adapter->rx_ps_pages) {
2362 /* Configure extra packet-split registers */
2363 rfctl = er32(RFCTL);
2364 rfctl |= E1000_RFCTL_EXTEN;
Bruce Allanad680762008-03-28 09:15:03 -07002365 /*
2366 * disable packet split support for IPv6 extension headers,
2367 * because some malformed IPv6 headers can hang the Rx
2368 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002369 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2370 E1000_RFCTL_NEW_IPV6_EXT_DIS);
2371
2372 ew32(RFCTL, rfctl);
2373
Auke Kok140a7482007-10-25 13:57:58 -07002374 /* Enable Packet split descriptors */
2375 rctl |= E1000_RCTL_DTYP_PS;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002376
2377 psrctl |= adapter->rx_ps_bsize0 >>
2378 E1000_PSRCTL_BSIZE0_SHIFT;
2379
2380 switch (adapter->rx_ps_pages) {
2381 case 3:
2382 psrctl |= PAGE_SIZE <<
2383 E1000_PSRCTL_BSIZE3_SHIFT;
2384 case 2:
2385 psrctl |= PAGE_SIZE <<
2386 E1000_PSRCTL_BSIZE2_SHIFT;
2387 case 1:
2388 psrctl |= PAGE_SIZE >>
2389 E1000_PSRCTL_BSIZE1_SHIFT;
2390 break;
2391 }
2392
2393 ew32(PSRCTL, psrctl);
2394 }
2395
2396 ew32(RCTL, rctl);
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002397 /* just started the receive unit, no need to restart */
2398 adapter->flags &= ~FLAG_RX_RESTART_NOW;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002399}
2400
2401/**
2402 * e1000_configure_rx - Configure Receive Unit after Reset
2403 * @adapter: board private structure
2404 *
2405 * Configure the Rx unit of the MAC after a reset.
2406 **/
2407static void e1000_configure_rx(struct e1000_adapter *adapter)
2408{
2409 struct e1000_hw *hw = &adapter->hw;
2410 struct e1000_ring *rx_ring = adapter->rx_ring;
2411 u64 rdba;
2412 u32 rdlen, rctl, rxcsum, ctrl_ext;
2413
2414 if (adapter->rx_ps_pages) {
2415 /* this is a 32 byte descriptor */
2416 rdlen = rx_ring->count *
2417 sizeof(union e1000_rx_desc_packet_split);
2418 adapter->clean_rx = e1000_clean_rx_irq_ps;
2419 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07002420 } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
2421 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2422 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
2423 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002424 } else {
Bruce Allan97ac8ca2008-04-29 09:16:05 -07002425 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002426 adapter->clean_rx = e1000_clean_rx_irq;
2427 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2428 }
2429
2430 /* disable receives while setting up the descriptors */
2431 rctl = er32(RCTL);
2432 ew32(RCTL, rctl & ~E1000_RCTL_EN);
2433 e1e_flush();
2434 msleep(10);
2435
2436 /* set the Receive Delay Timer Register */
2437 ew32(RDTR, adapter->rx_int_delay);
2438
2439 /* irq moderation */
2440 ew32(RADV, adapter->rx_abs_int_delay);
2441 if (adapter->itr_setting != 0)
Bruce Allanad680762008-03-28 09:15:03 -07002442 ew32(ITR, 1000000000 / (adapter->itr * 256));
Auke Kokbc7f75f2007-09-17 12:30:59 -07002443
2444 ctrl_ext = er32(CTRL_EXT);
2445 /* Reset delay timers after every interrupt */
2446 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2447 /* Auto-Mask interrupts upon ICR access */
2448 ctrl_ext |= E1000_CTRL_EXT_IAME;
2449 ew32(IAM, 0xffffffff);
2450 ew32(CTRL_EXT, ctrl_ext);
2451 e1e_flush();
2452
Bruce Allanad680762008-03-28 09:15:03 -07002453 /*
2454 * Setup the HW Rx Head and Tail Descriptor Pointers and
2455 * the Base and Length of the Rx Descriptor Ring
2456 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002457 rdba = rx_ring->dma;
2458 ew32(RDBAL, (rdba & DMA_32BIT_MASK));
2459 ew32(RDBAH, (rdba >> 32));
2460 ew32(RDLEN, rdlen);
2461 ew32(RDH, 0);
2462 ew32(RDT, 0);
2463 rx_ring->head = E1000_RDH;
2464 rx_ring->tail = E1000_RDT;
2465
2466 /* Enable Receive Checksum Offload for TCP and UDP */
2467 rxcsum = er32(RXCSUM);
2468 if (adapter->flags & FLAG_RX_CSUM_ENABLED) {
2469 rxcsum |= E1000_RXCSUM_TUOFL;
2470
Bruce Allanad680762008-03-28 09:15:03 -07002471 /*
2472 * IPv4 payload checksum for UDP fragments must be
2473 * used in conjunction with packet-split.
2474 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002475 if (adapter->rx_ps_pages)
2476 rxcsum |= E1000_RXCSUM_IPPCSE;
2477 } else {
2478 rxcsum &= ~E1000_RXCSUM_TUOFL;
2479 /* no need to clear IPPCSE as it defaults to 0 */
2480 }
2481 ew32(RXCSUM, rxcsum);
2482
Bruce Allanad680762008-03-28 09:15:03 -07002483 /*
2484 * Enable early receives on supported devices, only takes effect when
Auke Kokbc7f75f2007-09-17 12:30:59 -07002485 * packet size is equal or larger than the specified value (in 8 byte
Bruce Allanad680762008-03-28 09:15:03 -07002486 * units), e.g. using jumbo frames when setting to E1000_ERT_2048
2487 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002488 if ((adapter->flags & FLAG_HAS_ERT) &&
Bruce Allan97ac8ca2008-04-29 09:16:05 -07002489 (adapter->netdev->mtu > ETH_DATA_LEN)) {
2490 u32 rxdctl = er32(RXDCTL(0));
2491 ew32(RXDCTL(0), rxdctl | 0x3);
2492 ew32(ERT, E1000_ERT_2048 | (1 << 13));
2493 /*
2494 * With jumbo frames and early-receive enabled, excessive
2495 * C4->C2 latencies result in dropped transactions.
2496 */
2497 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2498 e1000e_driver_name, 55);
2499 } else {
2500 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2501 e1000e_driver_name,
2502 PM_QOS_DEFAULT_VALUE);
2503 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07002504
2505 /* Enable Receives */
2506 ew32(RCTL, rctl);
2507}
2508
2509/**
Jeff Kirshere2de3eb2008-03-28 09:15:11 -07002510 * e1000_update_mc_addr_list - Update Multicast addresses
Auke Kokbc7f75f2007-09-17 12:30:59 -07002511 * @hw: pointer to the HW structure
2512 * @mc_addr_list: array of multicast addresses to program
2513 * @mc_addr_count: number of multicast addresses to program
2514 * @rar_used_count: the first RAR register free to program
2515 * @rar_count: total number of supported Receive Address Registers
2516 *
2517 * Updates the Receive Address Registers and Multicast Table Array.
2518 * The caller must have a packed mc_addr_list of multicast addresses.
2519 * The parameter rar_count will usually be hw->mac.rar_entry_count
2520 * unless there are workarounds that change this. Currently no func pointer
2521 * exists and all implementations are handled in the generic version of this
2522 * function.
2523 **/
Jeff Kirshere2de3eb2008-03-28 09:15:11 -07002524static void e1000_update_mc_addr_list(struct e1000_hw *hw, u8 *mc_addr_list,
2525 u32 mc_addr_count, u32 rar_used_count,
2526 u32 rar_count)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002527{
Jeff Kirshere2de3eb2008-03-28 09:15:11 -07002528 hw->mac.ops.update_mc_addr_list(hw, mc_addr_list, mc_addr_count,
Auke Kokbc7f75f2007-09-17 12:30:59 -07002529 rar_used_count, rar_count);
2530}
2531
2532/**
2533 * e1000_set_multi - Multicast and Promiscuous mode set
2534 * @netdev: network interface device structure
2535 *
2536 * The set_multi entry point is called whenever the multicast address
2537 * list or the network interface flags are updated. This routine is
2538 * responsible for configuring the hardware for proper multicast,
2539 * promiscuous mode, and all-multi behavior.
2540 **/
2541static void e1000_set_multi(struct net_device *netdev)
2542{
2543 struct e1000_adapter *adapter = netdev_priv(netdev);
2544 struct e1000_hw *hw = &adapter->hw;
2545 struct e1000_mac_info *mac = &hw->mac;
2546 struct dev_mc_list *mc_ptr;
2547 u8 *mta_list;
2548 u32 rctl;
2549 int i;
2550
2551 /* Check for Promiscuous and All Multicast modes */
2552
2553 rctl = er32(RCTL);
2554
2555 if (netdev->flags & IFF_PROMISC) {
2556 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
Patrick McHardy746b9f02008-07-16 20:15:45 -07002557 rctl &= ~E1000_RCTL_VFE;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002558 } else {
Patrick McHardy746b9f02008-07-16 20:15:45 -07002559 if (netdev->flags & IFF_ALLMULTI) {
2560 rctl |= E1000_RCTL_MPE;
2561 rctl &= ~E1000_RCTL_UPE;
2562 } else {
2563 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2564 }
Patrick McHardy78ed11a2008-07-16 20:16:14 -07002565 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
Patrick McHardy746b9f02008-07-16 20:15:45 -07002566 rctl |= E1000_RCTL_VFE;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002567 }
2568
2569 ew32(RCTL, rctl);
2570
2571 if (netdev->mc_count) {
2572 mta_list = kmalloc(netdev->mc_count * 6, GFP_ATOMIC);
2573 if (!mta_list)
2574 return;
2575
2576 /* prepare a packed array of only addresses. */
2577 mc_ptr = netdev->mc_list;
2578
2579 for (i = 0; i < netdev->mc_count; i++) {
2580 if (!mc_ptr)
2581 break;
2582 memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr,
2583 ETH_ALEN);
2584 mc_ptr = mc_ptr->next;
2585 }
2586
Jeff Kirshere2de3eb2008-03-28 09:15:11 -07002587 e1000_update_mc_addr_list(hw, mta_list, i, 1,
Auke Kokbc7f75f2007-09-17 12:30:59 -07002588 mac->rar_entry_count);
2589 kfree(mta_list);
2590 } else {
2591 /*
2592 * if we're called from probe, we might not have
2593 * anything to do here, so clear out the list
2594 */
Jeff Kirshere2de3eb2008-03-28 09:15:11 -07002595 e1000_update_mc_addr_list(hw, NULL, 0, 1, mac->rar_entry_count);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002596 }
2597}
2598
2599/**
Bruce Allanad680762008-03-28 09:15:03 -07002600 * e1000_configure - configure the hardware for Rx and Tx
Auke Kokbc7f75f2007-09-17 12:30:59 -07002601 * @adapter: private board structure
2602 **/
2603static void e1000_configure(struct e1000_adapter *adapter)
2604{
2605 e1000_set_multi(adapter->netdev);
2606
2607 e1000_restore_vlan(adapter);
2608 e1000_init_manageability(adapter);
2609
2610 e1000_configure_tx(adapter);
2611 e1000_setup_rctl(adapter);
2612 e1000_configure_rx(adapter);
Bruce Allanad680762008-03-28 09:15:03 -07002613 adapter->alloc_rx_buf(adapter, e1000_desc_unused(adapter->rx_ring));
Auke Kokbc7f75f2007-09-17 12:30:59 -07002614}
2615
2616/**
2617 * e1000e_power_up_phy - restore link in case the phy was powered down
2618 * @adapter: address of board private structure
2619 *
2620 * The phy may be powered down to save power and turn off link when the
2621 * driver is unloaded and wake on lan is not enabled (among others)
2622 * *** this routine MUST be followed by a call to e1000e_reset ***
2623 **/
2624void e1000e_power_up_phy(struct e1000_adapter *adapter)
2625{
2626 u16 mii_reg = 0;
2627
2628 /* Just clear the power down bit to wake the phy back up */
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002629 if (adapter->hw.phy.media_type == e1000_media_type_copper) {
Bruce Allanad680762008-03-28 09:15:03 -07002630 /*
2631 * According to the manual, the phy will retain its
2632 * settings across a power-down/up cycle
2633 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002634 e1e_rphy(&adapter->hw, PHY_CONTROL, &mii_reg);
2635 mii_reg &= ~MII_CR_POWER_DOWN;
2636 e1e_wphy(&adapter->hw, PHY_CONTROL, mii_reg);
2637 }
2638
2639 adapter->hw.mac.ops.setup_link(&adapter->hw);
2640}
2641
2642/**
2643 * e1000_power_down_phy - Power down the PHY
2644 *
2645 * Power down the PHY so no link is implied when interface is down
2646 * The PHY cannot be powered down is management or WoL is active
2647 */
2648static void e1000_power_down_phy(struct e1000_adapter *adapter)
2649{
2650 struct e1000_hw *hw = &adapter->hw;
2651 u16 mii_reg;
2652
2653 /* WoL is enabled */
Auke Kok23b66e22008-02-11 09:25:51 -08002654 if (adapter->wol)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002655 return;
2656
2657 /* non-copper PHY? */
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002658 if (adapter->hw.phy.media_type != e1000_media_type_copper)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002659 return;
2660
2661 /* reset is blocked because of a SoL/IDER session */
Bruce Allanad680762008-03-28 09:15:03 -07002662 if (e1000e_check_mng_mode(hw) || e1000_check_reset_block(hw))
Auke Kokbc7f75f2007-09-17 12:30:59 -07002663 return;
2664
Auke Kok489815c2008-02-21 15:11:07 -08002665 /* manageability (AMT) is enabled */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002666 if (er32(MANC) & E1000_MANC_SMBUS_EN)
2667 return;
2668
2669 /* power down the PHY */
2670 e1e_rphy(hw, PHY_CONTROL, &mii_reg);
2671 mii_reg |= MII_CR_POWER_DOWN;
2672 e1e_wphy(hw, PHY_CONTROL, mii_reg);
2673 mdelay(1);
2674}
2675
2676/**
2677 * e1000e_reset - bring the hardware into a known good state
2678 *
2679 * This function boots the hardware and enables some settings that
2680 * require a configuration cycle of the hardware - those cannot be
2681 * set/changed during runtime. After reset the device needs to be
Bruce Allanad680762008-03-28 09:15:03 -07002682 * properly configured for Rx, Tx etc.
Auke Kokbc7f75f2007-09-17 12:30:59 -07002683 */
2684void e1000e_reset(struct e1000_adapter *adapter)
2685{
2686 struct e1000_mac_info *mac = &adapter->hw.mac;
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002687 struct e1000_fc_info *fc = &adapter->hw.fc;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002688 struct e1000_hw *hw = &adapter->hw;
2689 u32 tx_space, min_tx_space, min_rx_space;
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002690 u32 pba = adapter->pba;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002691 u16 hwm;
2692
Bruce Allanad680762008-03-28 09:15:03 -07002693 /* reset Packet Buffer Allocation to default */
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002694 ew32(PBA, pba);
Auke Kokdf762462007-10-25 13:57:53 -07002695
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002696 if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
Bruce Allanad680762008-03-28 09:15:03 -07002697 /*
2698 * To maintain wire speed transmits, the Tx FIFO should be
Auke Kokbc7f75f2007-09-17 12:30:59 -07002699 * large enough to accommodate two full transmit packets,
2700 * rounded up to the next 1KB and expressed in KB. Likewise,
2701 * the Rx FIFO should be large enough to accommodate at least
2702 * one full receive packet and is similarly rounded up and
Bruce Allanad680762008-03-28 09:15:03 -07002703 * expressed in KB.
2704 */
Auke Kokdf762462007-10-25 13:57:53 -07002705 pba = er32(PBA);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002706 /* upper 16 bits has Tx packet buffer allocation size in KB */
Auke Kokdf762462007-10-25 13:57:53 -07002707 tx_space = pba >> 16;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002708 /* lower 16 bits has Rx packet buffer allocation size in KB */
Auke Kokdf762462007-10-25 13:57:53 -07002709 pba &= 0xffff;
Bruce Allanad680762008-03-28 09:15:03 -07002710 /*
2711 * the Tx fifo also stores 16 bytes of information about the tx
2712 * but don't include ethernet FCS because hardware appends it
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002713 */
2714 min_tx_space = (adapter->max_frame_size +
Auke Kokbc7f75f2007-09-17 12:30:59 -07002715 sizeof(struct e1000_tx_desc) -
2716 ETH_FCS_LEN) * 2;
2717 min_tx_space = ALIGN(min_tx_space, 1024);
2718 min_tx_space >>= 10;
2719 /* software strips receive CRC, so leave room for it */
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002720 min_rx_space = adapter->max_frame_size;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002721 min_rx_space = ALIGN(min_rx_space, 1024);
2722 min_rx_space >>= 10;
2723
Bruce Allanad680762008-03-28 09:15:03 -07002724 /*
2725 * If current Tx allocation is less than the min Tx FIFO size,
Auke Kokbc7f75f2007-09-17 12:30:59 -07002726 * and the min Tx FIFO size is less than the current Rx FIFO
Bruce Allanad680762008-03-28 09:15:03 -07002727 * allocation, take space away from current Rx allocation
2728 */
Auke Kokdf762462007-10-25 13:57:53 -07002729 if ((tx_space < min_tx_space) &&
2730 ((min_tx_space - tx_space) < pba)) {
2731 pba -= min_tx_space - tx_space;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002732
Bruce Allanad680762008-03-28 09:15:03 -07002733 /*
2734 * if short on Rx space, Rx wins and must trump tx
2735 * adjustment or use Early Receive if available
2736 */
Auke Kokdf762462007-10-25 13:57:53 -07002737 if ((pba < min_rx_space) &&
Auke Kokbc7f75f2007-09-17 12:30:59 -07002738 (!(adapter->flags & FLAG_HAS_ERT)))
2739 /* ERT enabled in e1000_configure_rx */
Auke Kokdf762462007-10-25 13:57:53 -07002740 pba = min_rx_space;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002741 }
Auke Kokdf762462007-10-25 13:57:53 -07002742
2743 ew32(PBA, pba);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002744 }
2745
Auke Kokbc7f75f2007-09-17 12:30:59 -07002746
Bruce Allanad680762008-03-28 09:15:03 -07002747 /*
2748 * flow control settings
2749 *
2750 * The high water mark must be low enough to fit one full frame
Auke Kokbc7f75f2007-09-17 12:30:59 -07002751 * (or the size used for early receive) above it in the Rx FIFO.
2752 * Set it to the lower of:
2753 * - 90% of the Rx FIFO size, and
2754 * - the full Rx FIFO size minus the early receive size (for parts
2755 * with ERT support assuming ERT set to E1000_ERT_2048), or
Bruce Allanad680762008-03-28 09:15:03 -07002756 * - the full Rx FIFO size minus one full frame
2757 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002758 if (adapter->flags & FLAG_HAS_ERT)
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002759 hwm = min(((pba << 10) * 9 / 10),
2760 ((pba << 10) - (E1000_ERT_2048 << 3)));
Auke Kokbc7f75f2007-09-17 12:30:59 -07002761 else
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002762 hwm = min(((pba << 10) * 9 / 10),
2763 ((pba << 10) - adapter->max_frame_size));
Auke Kokbc7f75f2007-09-17 12:30:59 -07002764
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002765 fc->high_water = hwm & 0xFFF8; /* 8-byte granularity */
2766 fc->low_water = fc->high_water - 8;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002767
2768 if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002769 fc->pause_time = 0xFFFF;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002770 else
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002771 fc->pause_time = E1000_FC_PAUSE_TIME;
2772 fc->send_xon = 1;
Bruce Allan5c48ef3e22008-11-21 16:57:36 -08002773 fc->current_mode = fc->requested_mode;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002774
2775 /* Allow time for pending master requests to run */
2776 mac->ops.reset_hw(hw);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07002777
2778 /*
2779 * For parts with AMT enabled, let the firmware know
2780 * that the network interface is in control
2781 */
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07002782 if (adapter->flags & FLAG_HAS_AMT)
Bruce Allan97ac8ca2008-04-29 09:16:05 -07002783 e1000_get_hw_control(adapter);
2784
Auke Kokbc7f75f2007-09-17 12:30:59 -07002785 ew32(WUC, 0);
2786
2787 if (mac->ops.init_hw(hw))
Jeff Kirsher44defeb2008-08-04 17:20:41 -07002788 e_err("Hardware Error\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07002789
2790 e1000_update_mng_vlan(adapter);
2791
2792 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
2793 ew32(VET, ETH_P_8021Q);
2794
2795 e1000e_reset_adaptive(hw);
2796 e1000_get_phy_info(hw);
2797
2798 if (!(adapter->flags & FLAG_SMART_POWER_DOWN)) {
2799 u16 phy_data = 0;
Bruce Allanad680762008-03-28 09:15:03 -07002800 /*
2801 * speed up time to link by disabling smart power down, ignore
Auke Kokbc7f75f2007-09-17 12:30:59 -07002802 * the return value of this function because there is nothing
Bruce Allanad680762008-03-28 09:15:03 -07002803 * different we would do if it failed
2804 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002805 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
2806 phy_data &= ~IGP02E1000_PM_SPD;
2807 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
2808 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07002809}
2810
2811int e1000e_up(struct e1000_adapter *adapter)
2812{
2813 struct e1000_hw *hw = &adapter->hw;
2814
2815 /* hardware has been reset, we need to reload some things */
2816 e1000_configure(adapter);
2817
2818 clear_bit(__E1000_DOWN, &adapter->state);
2819
2820 napi_enable(&adapter->napi);
Bruce Allan4662e822008-08-26 18:37:06 -07002821 if (adapter->msix_entries)
2822 e1000_configure_msix(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002823 e1000_irq_enable(adapter);
2824
2825 /* fire a link change interrupt to start the watchdog */
2826 ew32(ICS, E1000_ICS_LSC);
2827 return 0;
2828}
2829
2830void e1000e_down(struct e1000_adapter *adapter)
2831{
2832 struct net_device *netdev = adapter->netdev;
2833 struct e1000_hw *hw = &adapter->hw;
2834 u32 tctl, rctl;
2835
Bruce Allanad680762008-03-28 09:15:03 -07002836 /*
2837 * signal that we're down so the interrupt handler does not
2838 * reschedule our watchdog timer
2839 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002840 set_bit(__E1000_DOWN, &adapter->state);
2841
2842 /* disable receives in the hardware */
2843 rctl = er32(RCTL);
2844 ew32(RCTL, rctl & ~E1000_RCTL_EN);
2845 /* flush and sleep below */
2846
Jeff Kirsherd55b53f2008-07-18 04:33:03 -07002847 netif_tx_stop_all_queues(netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002848
2849 /* disable transmits in the hardware */
2850 tctl = er32(TCTL);
2851 tctl &= ~E1000_TCTL_EN;
2852 ew32(TCTL, tctl);
2853 /* flush both disables and wait for them to finish */
2854 e1e_flush();
2855 msleep(10);
2856
2857 napi_disable(&adapter->napi);
2858 e1000_irq_disable(adapter);
2859
2860 del_timer_sync(&adapter->watchdog_timer);
2861 del_timer_sync(&adapter->phy_info_timer);
2862
2863 netdev->tx_queue_len = adapter->tx_queue_len;
2864 netif_carrier_off(netdev);
2865 adapter->link_speed = 0;
2866 adapter->link_duplex = 0;
2867
Jeff Kirsher52cc3082008-06-24 17:01:29 -07002868 if (!pci_channel_offline(adapter->pdev))
2869 e1000e_reset(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002870 e1000_clean_tx_ring(adapter);
2871 e1000_clean_rx_ring(adapter);
2872
2873 /*
2874 * TODO: for power management, we could drop the link and
2875 * pci_disable_device here.
2876 */
2877}
2878
2879void e1000e_reinit_locked(struct e1000_adapter *adapter)
2880{
2881 might_sleep();
2882 while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
2883 msleep(1);
2884 e1000e_down(adapter);
2885 e1000e_up(adapter);
2886 clear_bit(__E1000_RESETTING, &adapter->state);
2887}
2888
2889/**
2890 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
2891 * @adapter: board private structure to initialize
2892 *
2893 * e1000_sw_init initializes the Adapter private data structure.
2894 * Fields are initialized based on PCI device information and
2895 * OS network device settings (MTU size).
2896 **/
2897static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
2898{
Auke Kokbc7f75f2007-09-17 12:30:59 -07002899 struct net_device *netdev = adapter->netdev;
2900
2901 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
2902 adapter->rx_ps_bsize0 = 128;
Jeff Kirsher318a94d2008-03-28 09:15:16 -07002903 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2904 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002905
Bruce Allan4662e822008-08-26 18:37:06 -07002906 e1000e_set_interrupt_capability(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002907
Bruce Allan4662e822008-08-26 18:37:06 -07002908 if (e1000_alloc_queues(adapter))
2909 return -ENOMEM;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002910
Auke Kokbc7f75f2007-09-17 12:30:59 -07002911 /* Explicitly disable IRQ since the NIC can be in any state. */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002912 e1000_irq_disable(adapter);
2913
Auke Kokbc7f75f2007-09-17 12:30:59 -07002914 set_bit(__E1000_DOWN, &adapter->state);
2915 return 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002916}
2917
2918/**
Bruce Allanf8d59f72008-08-08 18:36:11 -07002919 * e1000_intr_msi_test - Interrupt Handler
2920 * @irq: interrupt number
2921 * @data: pointer to a network interface device structure
2922 **/
2923static irqreturn_t e1000_intr_msi_test(int irq, void *data)
2924{
2925 struct net_device *netdev = data;
2926 struct e1000_adapter *adapter = netdev_priv(netdev);
2927 struct e1000_hw *hw = &adapter->hw;
2928 u32 icr = er32(ICR);
2929
2930 e_dbg("%s: icr is %08X\n", netdev->name, icr);
2931 if (icr & E1000_ICR_RXSEQ) {
2932 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
2933 wmb();
2934 }
2935
2936 return IRQ_HANDLED;
2937}
2938
2939/**
2940 * e1000_test_msi_interrupt - Returns 0 for successful test
2941 * @adapter: board private struct
2942 *
2943 * code flow taken from tg3.c
2944 **/
2945static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
2946{
2947 struct net_device *netdev = adapter->netdev;
2948 struct e1000_hw *hw = &adapter->hw;
2949 int err;
2950
2951 /* poll_enable hasn't been called yet, so don't need disable */
2952 /* clear any pending events */
2953 er32(ICR);
2954
2955 /* free the real vector and request a test handler */
2956 e1000_free_irq(adapter);
Bruce Allan4662e822008-08-26 18:37:06 -07002957 e1000e_reset_interrupt_capability(adapter);
Bruce Allanf8d59f72008-08-08 18:36:11 -07002958
2959 /* Assume that the test fails, if it succeeds then the test
2960 * MSI irq handler will unset this flag */
2961 adapter->flags |= FLAG_MSI_TEST_FAILED;
2962
2963 err = pci_enable_msi(adapter->pdev);
2964 if (err)
2965 goto msi_test_failed;
2966
2967 err = request_irq(adapter->pdev->irq, &e1000_intr_msi_test, 0,
2968 netdev->name, netdev);
2969 if (err) {
2970 pci_disable_msi(adapter->pdev);
2971 goto msi_test_failed;
2972 }
2973
2974 wmb();
2975
2976 e1000_irq_enable(adapter);
2977
2978 /* fire an unusual interrupt on the test handler */
2979 ew32(ICS, E1000_ICS_RXSEQ);
2980 e1e_flush();
2981 msleep(50);
2982
2983 e1000_irq_disable(adapter);
2984
2985 rmb();
2986
2987 if (adapter->flags & FLAG_MSI_TEST_FAILED) {
Bruce Allan4662e822008-08-26 18:37:06 -07002988 adapter->int_mode = E1000E_INT_MODE_LEGACY;
Bruce Allanf8d59f72008-08-08 18:36:11 -07002989 err = -EIO;
2990 e_info("MSI interrupt test failed!\n");
2991 }
2992
2993 free_irq(adapter->pdev->irq, netdev);
2994 pci_disable_msi(adapter->pdev);
2995
2996 if (err == -EIO)
2997 goto msi_test_failed;
2998
2999 /* okay so the test worked, restore settings */
3000 e_dbg("%s: MSI interrupt test succeeded!\n", netdev->name);
3001msi_test_failed:
Bruce Allan4662e822008-08-26 18:37:06 -07003002 e1000e_set_interrupt_capability(adapter);
Bruce Allanf8d59f72008-08-08 18:36:11 -07003003 e1000_request_irq(adapter);
3004 return err;
3005}
3006
3007/**
3008 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3009 * @adapter: board private struct
3010 *
3011 * code flow taken from tg3.c, called with e1000 interrupts disabled.
3012 **/
3013static int e1000_test_msi(struct e1000_adapter *adapter)
3014{
3015 int err;
3016 u16 pci_cmd;
3017
3018 if (!(adapter->flags & FLAG_MSI_ENABLED))
3019 return 0;
3020
3021 /* disable SERR in case the MSI write causes a master abort */
3022 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3023 pci_write_config_word(adapter->pdev, PCI_COMMAND,
3024 pci_cmd & ~PCI_COMMAND_SERR);
3025
3026 err = e1000_test_msi_interrupt(adapter);
3027
3028 /* restore previous setting of command word */
3029 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
3030
3031 /* success ! */
3032 if (!err)
3033 return 0;
3034
3035 /* EIO means MSI test failed */
3036 if (err != -EIO)
3037 return err;
3038
3039 /* back to INTx mode */
3040 e_warn("MSI interrupt test failed, using legacy interrupt.\n");
3041
3042 e1000_free_irq(adapter);
3043
3044 err = e1000_request_irq(adapter);
3045
3046 return err;
3047}
3048
3049/**
Auke Kokbc7f75f2007-09-17 12:30:59 -07003050 * e1000_open - Called when a network interface is made active
3051 * @netdev: network interface device structure
3052 *
3053 * Returns 0 on success, negative value on failure
3054 *
3055 * The open entry point is called when a network interface is made
3056 * active by the system (IFF_UP). At this point all resources needed
3057 * for transmit and receive operations are allocated, the interrupt
3058 * handler is registered with the OS, the watchdog timer is started,
3059 * and the stack is notified that the interface is ready.
3060 **/
3061static int e1000_open(struct net_device *netdev)
3062{
3063 struct e1000_adapter *adapter = netdev_priv(netdev);
3064 struct e1000_hw *hw = &adapter->hw;
3065 int err;
3066
3067 /* disallow open during test */
3068 if (test_bit(__E1000_TESTING, &adapter->state))
3069 return -EBUSY;
3070
3071 /* allocate transmit descriptors */
3072 err = e1000e_setup_tx_resources(adapter);
3073 if (err)
3074 goto err_setup_tx;
3075
3076 /* allocate receive descriptors */
3077 err = e1000e_setup_rx_resources(adapter);
3078 if (err)
3079 goto err_setup_rx;
3080
3081 e1000e_power_up_phy(adapter);
3082
3083 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
3084 if ((adapter->hw.mng_cookie.status &
3085 E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
3086 e1000_update_mng_vlan(adapter);
3087
Bruce Allanad680762008-03-28 09:15:03 -07003088 /*
3089 * If AMT is enabled, let the firmware know that the network
3090 * interface is now open
3091 */
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07003092 if (adapter->flags & FLAG_HAS_AMT)
Auke Kokbc7f75f2007-09-17 12:30:59 -07003093 e1000_get_hw_control(adapter);
3094
Bruce Allanad680762008-03-28 09:15:03 -07003095 /*
3096 * before we allocate an interrupt, we must be ready to handle it.
Auke Kokbc7f75f2007-09-17 12:30:59 -07003097 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3098 * as soon as we call pci_request_irq, so we have to setup our
Bruce Allanad680762008-03-28 09:15:03 -07003099 * clean_rx handler before we do so.
3100 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003101 e1000_configure(adapter);
3102
3103 err = e1000_request_irq(adapter);
3104 if (err)
3105 goto err_req_irq;
3106
Bruce Allanf8d59f72008-08-08 18:36:11 -07003107 /*
3108 * Work around PCIe errata with MSI interrupts causing some chipsets to
3109 * ignore e1000e MSI messages, which means we need to test our MSI
3110 * interrupt now
3111 */
Bruce Allan4662e822008-08-26 18:37:06 -07003112 if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
Bruce Allanf8d59f72008-08-08 18:36:11 -07003113 err = e1000_test_msi(adapter);
3114 if (err) {
3115 e_err("Interrupt allocation failed\n");
3116 goto err_req_irq;
3117 }
3118 }
3119
Auke Kokbc7f75f2007-09-17 12:30:59 -07003120 /* From here on the code is the same as e1000e_up() */
3121 clear_bit(__E1000_DOWN, &adapter->state);
3122
3123 napi_enable(&adapter->napi);
3124
3125 e1000_irq_enable(adapter);
3126
Jeff Kirsherd55b53f2008-07-18 04:33:03 -07003127 netif_tx_start_all_queues(netdev);
3128
Auke Kokbc7f75f2007-09-17 12:30:59 -07003129 /* fire a link status change interrupt to start the watchdog */
3130 ew32(ICS, E1000_ICS_LSC);
3131
3132 return 0;
3133
3134err_req_irq:
3135 e1000_release_hw_control(adapter);
3136 e1000_power_down_phy(adapter);
3137 e1000e_free_rx_resources(adapter);
3138err_setup_rx:
3139 e1000e_free_tx_resources(adapter);
3140err_setup_tx:
3141 e1000e_reset(adapter);
3142
3143 return err;
3144}
3145
3146/**
3147 * e1000_close - Disables a network interface
3148 * @netdev: network interface device structure
3149 *
3150 * Returns 0, this is not allowed to fail
3151 *
3152 * The close entry point is called when an interface is de-activated
3153 * by the OS. The hardware is still under the drivers control, but
3154 * needs to be disabled. A global MAC reset is issued to stop the
3155 * hardware, and all transmit and receive resources are freed.
3156 **/
3157static int e1000_close(struct net_device *netdev)
3158{
3159 struct e1000_adapter *adapter = netdev_priv(netdev);
3160
3161 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
3162 e1000e_down(adapter);
3163 e1000_power_down_phy(adapter);
3164 e1000_free_irq(adapter);
3165
3166 e1000e_free_tx_resources(adapter);
3167 e1000e_free_rx_resources(adapter);
3168
Bruce Allanad680762008-03-28 09:15:03 -07003169 /*
3170 * kill manageability vlan ID if supported, but not if a vlan with
3171 * the same ID is registered on the host OS (let 8021q kill it)
3172 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003173 if ((adapter->hw.mng_cookie.status &
3174 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
3175 !(adapter->vlgrp &&
3176 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id)))
3177 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3178
Bruce Allanad680762008-03-28 09:15:03 -07003179 /*
3180 * If AMT is enabled, let the firmware know that the network
3181 * interface is now closed
3182 */
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07003183 if (adapter->flags & FLAG_HAS_AMT)
Auke Kokbc7f75f2007-09-17 12:30:59 -07003184 e1000_release_hw_control(adapter);
3185
3186 return 0;
3187}
3188/**
3189 * e1000_set_mac - Change the Ethernet Address of the NIC
3190 * @netdev: network interface device structure
3191 * @p: pointer to an address structure
3192 *
3193 * Returns 0 on success, negative on failure
3194 **/
3195static int e1000_set_mac(struct net_device *netdev, void *p)
3196{
3197 struct e1000_adapter *adapter = netdev_priv(netdev);
3198 struct sockaddr *addr = p;
3199
3200 if (!is_valid_ether_addr(addr->sa_data))
3201 return -EADDRNOTAVAIL;
3202
3203 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3204 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
3205
3206 e1000e_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
3207
3208 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
3209 /* activate the work around */
3210 e1000e_set_laa_state_82571(&adapter->hw, 1);
3211
Bruce Allanad680762008-03-28 09:15:03 -07003212 /*
3213 * Hold a copy of the LAA in RAR[14] This is done so that
Auke Kokbc7f75f2007-09-17 12:30:59 -07003214 * between the time RAR[0] gets clobbered and the time it
3215 * gets fixed (in e1000_watchdog), the actual LAA is in one
3216 * of the RARs and no incoming packets directed to this port
3217 * are dropped. Eventually the LAA will be in RAR[0] and
Bruce Allanad680762008-03-28 09:15:03 -07003218 * RAR[14]
3219 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003220 e1000e_rar_set(&adapter->hw,
3221 adapter->hw.mac.addr,
3222 adapter->hw.mac.rar_entry_count - 1);
3223 }
3224
3225 return 0;
3226}
3227
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07003228/**
3229 * e1000e_update_phy_task - work thread to update phy
3230 * @work: pointer to our work struct
3231 *
3232 * this worker thread exists because we must acquire a
3233 * semaphore to read the phy, which we could msleep while
3234 * waiting for it, and we can't msleep in a timer.
3235 **/
3236static void e1000e_update_phy_task(struct work_struct *work)
3237{
3238 struct e1000_adapter *adapter = container_of(work,
3239 struct e1000_adapter, update_phy_task);
3240 e1000_get_phy_info(&adapter->hw);
3241}
3242
Bruce Allanad680762008-03-28 09:15:03 -07003243/*
3244 * Need to wait a few seconds after link up to get diagnostic information from
3245 * the phy
3246 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003247static void e1000_update_phy_info(unsigned long data)
3248{
3249 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07003250 schedule_work(&adapter->update_phy_task);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003251}
3252
3253/**
3254 * e1000e_update_stats - Update the board statistics counters
3255 * @adapter: board private structure
3256 **/
3257void e1000e_update_stats(struct e1000_adapter *adapter)
3258{
3259 struct e1000_hw *hw = &adapter->hw;
3260 struct pci_dev *pdev = adapter->pdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003261
3262 /*
3263 * Prevent stats update while adapter is being reset, or if the pci
3264 * connection is down.
3265 */
3266 if (adapter->link_speed == 0)
3267 return;
3268 if (pci_channel_offline(pdev))
3269 return;
3270
Auke Kokbc7f75f2007-09-17 12:30:59 -07003271 adapter->stats.crcerrs += er32(CRCERRS);
3272 adapter->stats.gprc += er32(GPRC);
Bruce Allan7c257692008-04-23 11:09:00 -07003273 adapter->stats.gorc += er32(GORCL);
3274 er32(GORCH); /* Clear gorc */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003275 adapter->stats.bprc += er32(BPRC);
3276 adapter->stats.mprc += er32(MPRC);
3277 adapter->stats.roc += er32(ROC);
3278
Auke Kokbc7f75f2007-09-17 12:30:59 -07003279 adapter->stats.mpc += er32(MPC);
3280 adapter->stats.scc += er32(SCC);
3281 adapter->stats.ecol += er32(ECOL);
3282 adapter->stats.mcc += er32(MCC);
3283 adapter->stats.latecol += er32(LATECOL);
3284 adapter->stats.dc += er32(DC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003285 adapter->stats.xonrxc += er32(XONRXC);
3286 adapter->stats.xontxc += er32(XONTXC);
3287 adapter->stats.xoffrxc += er32(XOFFRXC);
3288 adapter->stats.xofftxc += er32(XOFFTXC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003289 adapter->stats.gptc += er32(GPTC);
Bruce Allan7c257692008-04-23 11:09:00 -07003290 adapter->stats.gotc += er32(GOTCL);
3291 er32(GOTCH); /* Clear gotc */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003292 adapter->stats.rnbc += er32(RNBC);
3293 adapter->stats.ruc += er32(RUC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003294
3295 adapter->stats.mptc += er32(MPTC);
3296 adapter->stats.bptc += er32(BPTC);
3297
3298 /* used for adaptive IFS */
3299
3300 hw->mac.tx_packet_delta = er32(TPT);
3301 adapter->stats.tpt += hw->mac.tx_packet_delta;
3302 hw->mac.collision_delta = er32(COLC);
3303 adapter->stats.colc += hw->mac.collision_delta;
3304
3305 adapter->stats.algnerrc += er32(ALGNERRC);
3306 adapter->stats.rxerrc += er32(RXERRC);
Alexander Duyck8c81c9c2009-03-19 01:12:27 +00003307 if ((hw->mac.type != e1000_82574) && (hw->mac.type != e1000_82583))
Bruce Allan4662e822008-08-26 18:37:06 -07003308 adapter->stats.tncrs += er32(TNCRS);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003309 adapter->stats.cexterr += er32(CEXTERR);
3310 adapter->stats.tsctc += er32(TSCTC);
3311 adapter->stats.tsctfc += er32(TSCTFC);
3312
Auke Kokbc7f75f2007-09-17 12:30:59 -07003313 /* Fill out the OS statistics structure */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003314 adapter->net_stats.multicast = adapter->stats.mprc;
3315 adapter->net_stats.collisions = adapter->stats.colc;
3316
3317 /* Rx Errors */
3318
Bruce Allanad680762008-03-28 09:15:03 -07003319 /*
3320 * RLEC on some newer hardware can be incorrect so build
3321 * our own version based on RUC and ROC
3322 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003323 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3324 adapter->stats.crcerrs + adapter->stats.algnerrc +
3325 adapter->stats.ruc + adapter->stats.roc +
3326 adapter->stats.cexterr;
3327 adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3328 adapter->stats.roc;
3329 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3330 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3331 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3332
3333 /* Tx Errors */
3334 adapter->net_stats.tx_errors = adapter->stats.ecol +
3335 adapter->stats.latecol;
3336 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3337 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3338 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3339
3340 /* Tx Dropped needs to be maintained elsewhere */
3341
Auke Kokbc7f75f2007-09-17 12:30:59 -07003342 /* Management Stats */
3343 adapter->stats.mgptc += er32(MGTPTC);
3344 adapter->stats.mgprc += er32(MGTPRC);
3345 adapter->stats.mgpdc += er32(MGTPDC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003346}
3347
Bruce Allan7c257692008-04-23 11:09:00 -07003348/**
3349 * e1000_phy_read_status - Update the PHY register status snapshot
3350 * @adapter: board private structure
3351 **/
3352static void e1000_phy_read_status(struct e1000_adapter *adapter)
3353{
3354 struct e1000_hw *hw = &adapter->hw;
3355 struct e1000_phy_regs *phy = &adapter->phy_regs;
3356 int ret_val;
Bruce Allan7c257692008-04-23 11:09:00 -07003357
3358 if ((er32(STATUS) & E1000_STATUS_LU) &&
3359 (adapter->hw.phy.media_type == e1000_media_type_copper)) {
3360 ret_val = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
3361 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
3362 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
3363 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
3364 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
3365 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
3366 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
3367 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
3368 if (ret_val)
Jeff Kirsher44defeb2008-08-04 17:20:41 -07003369 e_warn("Error reading PHY register\n");
Bruce Allan7c257692008-04-23 11:09:00 -07003370 } else {
3371 /*
3372 * Do not read PHY registers if link is not up
3373 * Set values to typical power-on defaults
3374 */
3375 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
3376 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
3377 BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
3378 BMSR_ERCAP);
3379 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
3380 ADVERTISE_ALL | ADVERTISE_CSMA);
3381 phy->lpa = 0;
3382 phy->expansion = EXPANSION_ENABLENPAGE;
3383 phy->ctrl1000 = ADVERTISE_1000FULL;
3384 phy->stat1000 = 0;
3385 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
3386 }
Bruce Allan7c257692008-04-23 11:09:00 -07003387}
3388
Auke Kokbc7f75f2007-09-17 12:30:59 -07003389static void e1000_print_link_info(struct e1000_adapter *adapter)
3390{
Auke Kokbc7f75f2007-09-17 12:30:59 -07003391 struct e1000_hw *hw = &adapter->hw;
3392 u32 ctrl = er32(CTRL);
3393
Bruce Allan8f12fe82008-11-21 16:54:43 -08003394 /* Link status message must follow this format for user tools */
3395 printk(KERN_INFO "e1000e: %s NIC Link is Up %d Mbps %s, "
3396 "Flow Control: %s\n",
3397 adapter->netdev->name,
Jeff Kirsher44defeb2008-08-04 17:20:41 -07003398 adapter->link_speed,
3399 (adapter->link_duplex == FULL_DUPLEX) ?
3400 "Full Duplex" : "Half Duplex",
3401 ((ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE)) ?
3402 "RX/TX" :
3403 ((ctrl & E1000_CTRL_RFCE) ? "RX" :
3404 ((ctrl & E1000_CTRL_TFCE) ? "TX" : "None" )));
Auke Kokbc7f75f2007-09-17 12:30:59 -07003405}
3406
Bruce Allana20e4cf2008-11-21 17:01:35 -08003407bool e1000_has_link(struct e1000_adapter *adapter)
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003408{
3409 struct e1000_hw *hw = &adapter->hw;
3410 bool link_active = 0;
3411 s32 ret_val = 0;
3412
3413 /*
3414 * get_link_status is set on LSC (link status) interrupt or
3415 * Rx sequence error interrupt. get_link_status will stay
3416 * false until the check_for_link establishes link
3417 * for copper adapters ONLY
3418 */
3419 switch (hw->phy.media_type) {
3420 case e1000_media_type_copper:
3421 if (hw->mac.get_link_status) {
3422 ret_val = hw->mac.ops.check_for_link(hw);
3423 link_active = !hw->mac.get_link_status;
3424 } else {
3425 link_active = 1;
3426 }
3427 break;
3428 case e1000_media_type_fiber:
3429 ret_val = hw->mac.ops.check_for_link(hw);
3430 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
3431 break;
3432 case e1000_media_type_internal_serdes:
3433 ret_val = hw->mac.ops.check_for_link(hw);
3434 link_active = adapter->hw.mac.serdes_has_link;
3435 break;
3436 default:
3437 case e1000_media_type_unknown:
3438 break;
3439 }
3440
3441 if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
3442 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
3443 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
Jeff Kirsher44defeb2008-08-04 17:20:41 -07003444 e_info("Gigabit has been disabled, downgrading speed\n");
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003445 }
3446
3447 return link_active;
3448}
3449
3450static void e1000e_enable_receives(struct e1000_adapter *adapter)
3451{
3452 /* make sure the receive unit is started */
3453 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
3454 (adapter->flags & FLAG_RX_RESTART_NOW)) {
3455 struct e1000_hw *hw = &adapter->hw;
3456 u32 rctl = er32(RCTL);
3457 ew32(RCTL, rctl | E1000_RCTL_EN);
3458 adapter->flags &= ~FLAG_RX_RESTART_NOW;
3459 }
3460}
3461
Auke Kokbc7f75f2007-09-17 12:30:59 -07003462/**
3463 * e1000_watchdog - Timer Call-back
3464 * @data: pointer to adapter cast into an unsigned long
3465 **/
3466static void e1000_watchdog(unsigned long data)
3467{
3468 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3469
3470 /* Do the rest outside of interrupt context */
3471 schedule_work(&adapter->watchdog_task);
3472
3473 /* TODO: make this use queue_delayed_work() */
3474}
3475
3476static void e1000_watchdog_task(struct work_struct *work)
3477{
3478 struct e1000_adapter *adapter = container_of(work,
3479 struct e1000_adapter, watchdog_task);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003480 struct net_device *netdev = adapter->netdev;
3481 struct e1000_mac_info *mac = &adapter->hw.mac;
Bruce Allan75eb0fa2008-11-21 16:53:51 -08003482 struct e1000_phy_info *phy = &adapter->hw.phy;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003483 struct e1000_ring *tx_ring = adapter->tx_ring;
3484 struct e1000_hw *hw = &adapter->hw;
3485 u32 link, tctl;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003486 int tx_pending = 0;
3487
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003488 link = e1000_has_link(adapter);
3489 if ((netif_carrier_ok(netdev)) && link) {
3490 e1000e_enable_receives(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003491 goto link_up;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003492 }
3493
3494 if ((e1000e_enable_tx_pkt_filtering(hw)) &&
3495 (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
3496 e1000_update_mng_vlan(adapter);
3497
Auke Kokbc7f75f2007-09-17 12:30:59 -07003498 if (link) {
3499 if (!netif_carrier_ok(netdev)) {
3500 bool txb2b = 1;
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003501 /* update snapshot of PHY registers on LSC */
Bruce Allan7c257692008-04-23 11:09:00 -07003502 e1000_phy_read_status(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003503 mac->ops.get_link_up_info(&adapter->hw,
3504 &adapter->link_speed,
3505 &adapter->link_duplex);
3506 e1000_print_link_info(adapter);
Bruce Allanad680762008-03-28 09:15:03 -07003507 /*
Bruce Allanf4187b52008-08-26 18:36:50 -07003508 * On supported PHYs, check for duplex mismatch only
3509 * if link has autonegotiated at 10/100 half
3510 */
3511 if ((hw->phy.type == e1000_phy_igp_3 ||
3512 hw->phy.type == e1000_phy_bm) &&
3513 (hw->mac.autoneg == true) &&
3514 (adapter->link_speed == SPEED_10 ||
3515 adapter->link_speed == SPEED_100) &&
3516 (adapter->link_duplex == HALF_DUPLEX)) {
3517 u16 autoneg_exp;
3518
3519 e1e_rphy(hw, PHY_AUTONEG_EXP, &autoneg_exp);
3520
3521 if (!(autoneg_exp & NWAY_ER_LP_NWAY_CAPS))
3522 e_info("Autonegotiated half duplex but"
3523 " link partner cannot autoneg. "
3524 " Try forcing full duplex if "
3525 "link gets many collisions.\n");
3526 }
3527
3528 /*
Bruce Allanad680762008-03-28 09:15:03 -07003529 * tweak tx_queue_len according to speed/duplex
3530 * and adjust the timeout factor
3531 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003532 netdev->tx_queue_len = adapter->tx_queue_len;
3533 adapter->tx_timeout_factor = 1;
3534 switch (adapter->link_speed) {
3535 case SPEED_10:
3536 txb2b = 0;
3537 netdev->tx_queue_len = 10;
Bruce Allan10f1b492008-08-08 18:36:01 -07003538 adapter->tx_timeout_factor = 16;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003539 break;
3540 case SPEED_100:
3541 txb2b = 0;
3542 netdev->tx_queue_len = 100;
3543 /* maybe add some timeout factor ? */
3544 break;
3545 }
3546
Bruce Allanad680762008-03-28 09:15:03 -07003547 /*
3548 * workaround: re-program speed mode bit after
3549 * link-up event
3550 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003551 if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
3552 !txb2b) {
3553 u32 tarc0;
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07003554 tarc0 = er32(TARC(0));
Auke Kokbc7f75f2007-09-17 12:30:59 -07003555 tarc0 &= ~SPEED_MODE_BIT;
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07003556 ew32(TARC(0), tarc0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003557 }
3558
Bruce Allanad680762008-03-28 09:15:03 -07003559 /*
3560 * disable TSO for pcie and 10/100 speeds, to avoid
3561 * some hardware issues
3562 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003563 if (!(adapter->flags & FLAG_TSO_FORCE)) {
3564 switch (adapter->link_speed) {
3565 case SPEED_10:
3566 case SPEED_100:
Jeff Kirsher44defeb2008-08-04 17:20:41 -07003567 e_info("10/100 speed: disabling TSO\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07003568 netdev->features &= ~NETIF_F_TSO;
3569 netdev->features &= ~NETIF_F_TSO6;
3570 break;
3571 case SPEED_1000:
3572 netdev->features |= NETIF_F_TSO;
3573 netdev->features |= NETIF_F_TSO6;
3574 break;
3575 default:
3576 /* oops */
3577 break;
3578 }
3579 }
3580
Bruce Allanad680762008-03-28 09:15:03 -07003581 /*
3582 * enable transmits in the hardware, need to do this
3583 * after setting TARC(0)
3584 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003585 tctl = er32(TCTL);
3586 tctl |= E1000_TCTL_EN;
3587 ew32(TCTL, tctl);
3588
Bruce Allan75eb0fa2008-11-21 16:53:51 -08003589 /*
3590 * Perform any post-link-up configuration before
3591 * reporting link up.
3592 */
3593 if (phy->ops.cfg_on_link_up)
3594 phy->ops.cfg_on_link_up(hw);
3595
Auke Kokbc7f75f2007-09-17 12:30:59 -07003596 netif_carrier_on(netdev);
Jeff Kirsherd55b53f2008-07-18 04:33:03 -07003597 netif_tx_wake_all_queues(netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003598
3599 if (!test_bit(__E1000_DOWN, &adapter->state))
3600 mod_timer(&adapter->phy_info_timer,
3601 round_jiffies(jiffies + 2 * HZ));
Auke Kokbc7f75f2007-09-17 12:30:59 -07003602 }
3603 } else {
3604 if (netif_carrier_ok(netdev)) {
3605 adapter->link_speed = 0;
3606 adapter->link_duplex = 0;
Bruce Allan8f12fe82008-11-21 16:54:43 -08003607 /* Link status message must follow this format */
3608 printk(KERN_INFO "e1000e: %s NIC Link is Down\n",
3609 adapter->netdev->name);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003610 netif_carrier_off(netdev);
Jeff Kirsherd55b53f2008-07-18 04:33:03 -07003611 netif_tx_stop_all_queues(netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003612 if (!test_bit(__E1000_DOWN, &adapter->state))
3613 mod_timer(&adapter->phy_info_timer,
3614 round_jiffies(jiffies + 2 * HZ));
3615
3616 if (adapter->flags & FLAG_RX_NEEDS_RESTART)
3617 schedule_work(&adapter->reset_task);
3618 }
3619 }
3620
3621link_up:
3622 e1000e_update_stats(adapter);
3623
3624 mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
3625 adapter->tpt_old = adapter->stats.tpt;
3626 mac->collision_delta = adapter->stats.colc - adapter->colc_old;
3627 adapter->colc_old = adapter->stats.colc;
3628
Bruce Allan7c257692008-04-23 11:09:00 -07003629 adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
3630 adapter->gorc_old = adapter->stats.gorc;
3631 adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
3632 adapter->gotc_old = adapter->stats.gotc;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003633
3634 e1000e_update_adaptive(&adapter->hw);
3635
3636 if (!netif_carrier_ok(netdev)) {
3637 tx_pending = (e1000_desc_unused(tx_ring) + 1 <
3638 tx_ring->count);
3639 if (tx_pending) {
Bruce Allanad680762008-03-28 09:15:03 -07003640 /*
3641 * We've lost link, so the controller stops DMA,
Auke Kokbc7f75f2007-09-17 12:30:59 -07003642 * but we've got queued Tx work that's never going
3643 * to get done, so reset controller to flush Tx.
Bruce Allanad680762008-03-28 09:15:03 -07003644 * (Do the reset outside of interrupt context).
3645 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003646 adapter->tx_timeout_count++;
3647 schedule_work(&adapter->reset_task);
3648 }
3649 }
3650
Bruce Allanad680762008-03-28 09:15:03 -07003651 /* Cause software interrupt to ensure Rx ring is cleaned */
Bruce Allan4662e822008-08-26 18:37:06 -07003652 if (adapter->msix_entries)
3653 ew32(ICS, adapter->rx_ring->ims_val);
3654 else
3655 ew32(ICS, E1000_ICS_RXDMT0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003656
3657 /* Force detection of hung controller every watchdog period */
3658 adapter->detect_tx_hung = 1;
3659
Bruce Allanad680762008-03-28 09:15:03 -07003660 /*
3661 * With 82571 controllers, LAA may be overwritten due to controller
3662 * reset from the other port. Set the appropriate LAA in RAR[0]
3663 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003664 if (e1000e_get_laa_state_82571(hw))
3665 e1000e_rar_set(hw, adapter->hw.mac.addr, 0);
3666
3667 /* Reset the timer */
3668 if (!test_bit(__E1000_DOWN, &adapter->state))
3669 mod_timer(&adapter->watchdog_timer,
3670 round_jiffies(jiffies + 2 * HZ));
3671}
3672
3673#define E1000_TX_FLAGS_CSUM 0x00000001
3674#define E1000_TX_FLAGS_VLAN 0x00000002
3675#define E1000_TX_FLAGS_TSO 0x00000004
3676#define E1000_TX_FLAGS_IPV4 0x00000008
3677#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
3678#define E1000_TX_FLAGS_VLAN_SHIFT 16
3679
3680static int e1000_tso(struct e1000_adapter *adapter,
3681 struct sk_buff *skb)
3682{
3683 struct e1000_ring *tx_ring = adapter->tx_ring;
3684 struct e1000_context_desc *context_desc;
3685 struct e1000_buffer *buffer_info;
3686 unsigned int i;
3687 u32 cmd_length = 0;
3688 u16 ipcse = 0, tucse, mss;
3689 u8 ipcss, ipcso, tucss, tucso, hdr_len;
3690 int err;
3691
3692 if (skb_is_gso(skb)) {
3693 if (skb_header_cloned(skb)) {
3694 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3695 if (err)
3696 return err;
3697 }
3698
3699 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3700 mss = skb_shinfo(skb)->gso_size;
3701 if (skb->protocol == htons(ETH_P_IP)) {
3702 struct iphdr *iph = ip_hdr(skb);
3703 iph->tot_len = 0;
3704 iph->check = 0;
3705 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
3706 iph->daddr, 0,
3707 IPPROTO_TCP,
3708 0);
3709 cmd_length = E1000_TXD_CMD_IP;
3710 ipcse = skb_transport_offset(skb) - 1;
3711 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
3712 ipv6_hdr(skb)->payload_len = 0;
3713 tcp_hdr(skb)->check =
3714 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3715 &ipv6_hdr(skb)->daddr,
3716 0, IPPROTO_TCP, 0);
3717 ipcse = 0;
3718 }
3719 ipcss = skb_network_offset(skb);
3720 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
3721 tucss = skb_transport_offset(skb);
3722 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
3723 tucse = 0;
3724
3725 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
3726 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
3727
3728 i = tx_ring->next_to_use;
3729 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3730 buffer_info = &tx_ring->buffer_info[i];
3731
3732 context_desc->lower_setup.ip_fields.ipcss = ipcss;
3733 context_desc->lower_setup.ip_fields.ipcso = ipcso;
3734 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
3735 context_desc->upper_setup.tcp_fields.tucss = tucss;
3736 context_desc->upper_setup.tcp_fields.tucso = tucso;
3737 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
3738 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
3739 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
3740 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
3741
3742 buffer_info->time_stamp = jiffies;
3743 buffer_info->next_to_watch = i;
3744
3745 i++;
3746 if (i == tx_ring->count)
3747 i = 0;
3748 tx_ring->next_to_use = i;
3749
3750 return 1;
3751 }
3752
3753 return 0;
3754}
3755
3756static bool e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
3757{
3758 struct e1000_ring *tx_ring = adapter->tx_ring;
3759 struct e1000_context_desc *context_desc;
3760 struct e1000_buffer *buffer_info;
3761 unsigned int i;
3762 u8 css;
Dave Grahamaf807c82008-10-09 14:28:58 -07003763 u32 cmd_len = E1000_TXD_CMD_DEXT;
Arthur Jones5f66f202009-03-19 01:13:08 +00003764 __be16 protocol;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003765
Dave Grahamaf807c82008-10-09 14:28:58 -07003766 if (skb->ip_summed != CHECKSUM_PARTIAL)
3767 return 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003768
Arthur Jones5f66f202009-03-19 01:13:08 +00003769 if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
3770 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
3771 else
3772 protocol = skb->protocol;
3773
Arthur Jones3f518392009-03-20 15:56:35 -07003774 switch (protocol) {
Harvey Harrison09640e62009-02-01 00:45:17 -08003775 case cpu_to_be16(ETH_P_IP):
Dave Grahamaf807c82008-10-09 14:28:58 -07003776 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
3777 cmd_len |= E1000_TXD_CMD_TCP;
3778 break;
Harvey Harrison09640e62009-02-01 00:45:17 -08003779 case cpu_to_be16(ETH_P_IPV6):
Dave Grahamaf807c82008-10-09 14:28:58 -07003780 /* XXX not handling all IPV6 headers */
3781 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3782 cmd_len |= E1000_TXD_CMD_TCP;
3783 break;
3784 default:
3785 if (unlikely(net_ratelimit()))
Arthur Jones5f66f202009-03-19 01:13:08 +00003786 e_warn("checksum_partial proto=%x!\n",
3787 be16_to_cpu(protocol));
Dave Grahamaf807c82008-10-09 14:28:58 -07003788 break;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003789 }
3790
Dave Grahamaf807c82008-10-09 14:28:58 -07003791 css = skb_transport_offset(skb);
3792
3793 i = tx_ring->next_to_use;
3794 buffer_info = &tx_ring->buffer_info[i];
3795 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3796
3797 context_desc->lower_setup.ip_config = 0;
3798 context_desc->upper_setup.tcp_fields.tucss = css;
3799 context_desc->upper_setup.tcp_fields.tucso =
3800 css + skb->csum_offset;
3801 context_desc->upper_setup.tcp_fields.tucse = 0;
3802 context_desc->tcp_seg_setup.data = 0;
3803 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
3804
3805 buffer_info->time_stamp = jiffies;
3806 buffer_info->next_to_watch = i;
3807
3808 i++;
3809 if (i == tx_ring->count)
3810 i = 0;
3811 tx_ring->next_to_use = i;
3812
3813 return 1;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003814}
3815
3816#define E1000_MAX_PER_TXD 8192
3817#define E1000_MAX_TXD_PWR 12
3818
3819static int e1000_tx_map(struct e1000_adapter *adapter,
3820 struct sk_buff *skb, unsigned int first,
3821 unsigned int max_per_txd, unsigned int nr_frags,
3822 unsigned int mss)
3823{
3824 struct e1000_ring *tx_ring = adapter->tx_ring;
Alexander Duyck1b7719c2009-03-19 01:12:50 +00003825 struct e1000_buffer *buffer_info;
Jesse Brandeburg8ddc9512009-03-02 16:02:53 -08003826 unsigned int len = skb_headlen(skb);
3827 unsigned int offset, size, count = 0, i;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003828 unsigned int f;
Alexander Duyck1b7719c2009-03-19 01:12:50 +00003829 dma_addr_t *map;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003830
3831 i = tx_ring->next_to_use;
3832
Jesse Brandeburg8ddc9512009-03-02 16:02:53 -08003833 if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
3834 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
3835 adapter->tx_dma_failed++;
Alexander Duyck1b7719c2009-03-19 01:12:50 +00003836 return 0;
Jesse Brandeburg8ddc9512009-03-02 16:02:53 -08003837 }
3838
Alexander Duyck1b7719c2009-03-19 01:12:50 +00003839 map = skb_shinfo(skb)->dma_maps;
Jesse Brandeburg8ddc9512009-03-02 16:02:53 -08003840 offset = 0;
3841
Auke Kokbc7f75f2007-09-17 12:30:59 -07003842 while (len) {
Alexander Duyck1b7719c2009-03-19 01:12:50 +00003843 buffer_info = &tx_ring->buffer_info[i];
Auke Kokbc7f75f2007-09-17 12:30:59 -07003844 size = min(len, max_per_txd);
3845
Auke Kokbc7f75f2007-09-17 12:30:59 -07003846 buffer_info->length = size;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003847 buffer_info->time_stamp = jiffies;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003848 buffer_info->next_to_watch = i;
Alexander Duyck1b7719c2009-03-19 01:12:50 +00003849 buffer_info->dma = map[0] + offset;
3850 count++;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003851
3852 len -= size;
3853 offset += size;
Alexander Duyck1b7719c2009-03-19 01:12:50 +00003854
3855 if (len) {
3856 i++;
3857 if (i == tx_ring->count)
3858 i = 0;
3859 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07003860 }
3861
3862 for (f = 0; f < nr_frags; f++) {
3863 struct skb_frag_struct *frag;
3864
3865 frag = &skb_shinfo(skb)->frags[f];
3866 len = frag->size;
Jesse Brandeburg8ddc9512009-03-02 16:02:53 -08003867 offset = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003868
3869 while (len) {
Alexander Duyck1b7719c2009-03-19 01:12:50 +00003870 i++;
3871 if (i == tx_ring->count)
3872 i = 0;
3873
Auke Kokbc7f75f2007-09-17 12:30:59 -07003874 buffer_info = &tx_ring->buffer_info[i];
3875 size = min(len, max_per_txd);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003876
3877 buffer_info->length = size;
3878 buffer_info->time_stamp = jiffies;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003879 buffer_info->next_to_watch = i;
Alexander Duyck1b7719c2009-03-19 01:12:50 +00003880 buffer_info->dma = map[f + 1] + offset;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003881
3882 len -= size;
3883 offset += size;
3884 count++;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003885 }
3886 }
3887
Auke Kokbc7f75f2007-09-17 12:30:59 -07003888 tx_ring->buffer_info[i].skb = skb;
3889 tx_ring->buffer_info[first].next_to_watch = i;
3890
3891 return count;
3892}
3893
3894static void e1000_tx_queue(struct e1000_adapter *adapter,
3895 int tx_flags, int count)
3896{
3897 struct e1000_ring *tx_ring = adapter->tx_ring;
3898 struct e1000_tx_desc *tx_desc = NULL;
3899 struct e1000_buffer *buffer_info;
3900 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3901 unsigned int i;
3902
3903 if (tx_flags & E1000_TX_FLAGS_TSO) {
3904 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3905 E1000_TXD_CMD_TSE;
3906 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3907
3908 if (tx_flags & E1000_TX_FLAGS_IPV4)
3909 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3910 }
3911
3912 if (tx_flags & E1000_TX_FLAGS_CSUM) {
3913 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3914 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3915 }
3916
3917 if (tx_flags & E1000_TX_FLAGS_VLAN) {
3918 txd_lower |= E1000_TXD_CMD_VLE;
3919 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3920 }
3921
3922 i = tx_ring->next_to_use;
3923
3924 while (count--) {
3925 buffer_info = &tx_ring->buffer_info[i];
3926 tx_desc = E1000_TX_DESC(*tx_ring, i);
3927 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3928 tx_desc->lower.data =
3929 cpu_to_le32(txd_lower | buffer_info->length);
3930 tx_desc->upper.data = cpu_to_le32(txd_upper);
3931
3932 i++;
3933 if (i == tx_ring->count)
3934 i = 0;
3935 }
3936
3937 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3938
Bruce Allanad680762008-03-28 09:15:03 -07003939 /*
3940 * Force memory writes to complete before letting h/w
Auke Kokbc7f75f2007-09-17 12:30:59 -07003941 * know there are new descriptors to fetch. (Only
3942 * applicable for weak-ordered memory model archs,
Bruce Allanad680762008-03-28 09:15:03 -07003943 * such as IA-64).
3944 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003945 wmb();
3946
3947 tx_ring->next_to_use = i;
3948 writel(i, adapter->hw.hw_addr + tx_ring->tail);
Bruce Allanad680762008-03-28 09:15:03 -07003949 /*
3950 * we need this if more than one processor can write to our tail
3951 * at a time, it synchronizes IO on IA64/Altix systems
3952 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003953 mmiowb();
3954}
3955
3956#define MINIMUM_DHCP_PACKET_SIZE 282
3957static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3958 struct sk_buff *skb)
3959{
3960 struct e1000_hw *hw = &adapter->hw;
3961 u16 length, offset;
3962
3963 if (vlan_tx_tag_present(skb)) {
3964 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id)
3965 && (adapter->hw.mng_cookie.status &
3966 E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
3967 return 0;
3968 }
3969
3970 if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
3971 return 0;
3972
3973 if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
3974 return 0;
3975
3976 {
3977 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
3978 struct udphdr *udp;
3979
3980 if (ip->protocol != IPPROTO_UDP)
3981 return 0;
3982
3983 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
3984 if (ntohs(udp->dest) != 67)
3985 return 0;
3986
3987 offset = (u8 *)udp + 8 - skb->data;
3988 length = skb->len - offset;
3989 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
3990 }
3991
3992 return 0;
3993}
3994
3995static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3996{
3997 struct e1000_adapter *adapter = netdev_priv(netdev);
3998
3999 netif_stop_queue(netdev);
Bruce Allanad680762008-03-28 09:15:03 -07004000 /*
4001 * Herbert's original patch had:
Auke Kokbc7f75f2007-09-17 12:30:59 -07004002 * smp_mb__after_netif_stop_queue();
Bruce Allanad680762008-03-28 09:15:03 -07004003 * but since that doesn't exist yet, just open code it.
4004 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004005 smp_mb();
4006
Bruce Allanad680762008-03-28 09:15:03 -07004007 /*
4008 * We need to check again in a case another CPU has just
4009 * made room available.
4010 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004011 if (e1000_desc_unused(adapter->tx_ring) < size)
4012 return -EBUSY;
4013
4014 /* A reprieve! */
4015 netif_start_queue(netdev);
4016 ++adapter->restart_queue;
4017 return 0;
4018}
4019
4020static int e1000_maybe_stop_tx(struct net_device *netdev, int size)
4021{
4022 struct e1000_adapter *adapter = netdev_priv(netdev);
4023
4024 if (e1000_desc_unused(adapter->tx_ring) >= size)
4025 return 0;
4026 return __e1000_maybe_stop_tx(netdev, size);
4027}
4028
4029#define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
4030static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
4031{
4032 struct e1000_adapter *adapter = netdev_priv(netdev);
4033 struct e1000_ring *tx_ring = adapter->tx_ring;
4034 unsigned int first;
4035 unsigned int max_per_txd = E1000_MAX_PER_TXD;
4036 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
4037 unsigned int tx_flags = 0;
Auke Kok4e6c7092007-10-05 14:15:23 -07004038 unsigned int len = skb->len - skb->data_len;
Auke Kok4e6c7092007-10-05 14:15:23 -07004039 unsigned int nr_frags;
4040 unsigned int mss;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004041 int count = 0;
4042 int tso;
4043 unsigned int f;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004044
4045 if (test_bit(__E1000_DOWN, &adapter->state)) {
4046 dev_kfree_skb_any(skb);
4047 return NETDEV_TX_OK;
4048 }
4049
4050 if (skb->len <= 0) {
4051 dev_kfree_skb_any(skb);
4052 return NETDEV_TX_OK;
4053 }
4054
4055 mss = skb_shinfo(skb)->gso_size;
Bruce Allanad680762008-03-28 09:15:03 -07004056 /*
4057 * The controller does a simple calculation to
Auke Kokbc7f75f2007-09-17 12:30:59 -07004058 * make sure there is enough room in the FIFO before
4059 * initiating the DMA for each buffer. The calc is:
4060 * 4 = ceil(buffer len/mss). To make sure we don't
4061 * overrun the FIFO, adjust the max buffer len if mss
Bruce Allanad680762008-03-28 09:15:03 -07004062 * drops.
4063 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004064 if (mss) {
4065 u8 hdr_len;
4066 max_per_txd = min(mss << 2, max_per_txd);
4067 max_txd_pwr = fls(max_per_txd) - 1;
4068
Bruce Allanad680762008-03-28 09:15:03 -07004069 /*
4070 * TSO Workaround for 82571/2/3 Controllers -- if skb->data
4071 * points to just header, pull a few bytes of payload from
4072 * frags into skb->data
4073 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004074 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
Bruce Allanad680762008-03-28 09:15:03 -07004075 /*
4076 * we do this workaround for ES2LAN, but it is un-necessary,
4077 * avoiding it could save a lot of cycles
4078 */
Auke Kok4e6c7092007-10-05 14:15:23 -07004079 if (skb->data_len && (hdr_len == len)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07004080 unsigned int pull_size;
4081
4082 pull_size = min((unsigned int)4, skb->data_len);
4083 if (!__pskb_pull_tail(skb, pull_size)) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004084 e_err("__pskb_pull_tail failed.\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07004085 dev_kfree_skb_any(skb);
4086 return NETDEV_TX_OK;
4087 }
4088 len = skb->len - skb->data_len;
4089 }
4090 }
4091
4092 /* reserve a descriptor for the offload context */
4093 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
4094 count++;
4095 count++;
4096
4097 count += TXD_USE_COUNT(len, max_txd_pwr);
4098
4099 nr_frags = skb_shinfo(skb)->nr_frags;
4100 for (f = 0; f < nr_frags; f++)
4101 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
4102 max_txd_pwr);
4103
4104 if (adapter->hw.mac.tx_pkt_filtering)
4105 e1000_transfer_dhcp_info(adapter, skb);
4106
Bruce Allanad680762008-03-28 09:15:03 -07004107 /*
4108 * need: count + 2 desc gap to keep tail from touching
4109 * head, otherwise try next time
4110 */
Jesse Brandeburg92af3e92009-01-19 14:17:08 +00004111 if (e1000_maybe_stop_tx(netdev, count + 2))
Auke Kokbc7f75f2007-09-17 12:30:59 -07004112 return NETDEV_TX_BUSY;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004113
4114 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
4115 tx_flags |= E1000_TX_FLAGS_VLAN;
4116 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
4117 }
4118
4119 first = tx_ring->next_to_use;
4120
4121 tso = e1000_tso(adapter, skb);
4122 if (tso < 0) {
4123 dev_kfree_skb_any(skb);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004124 return NETDEV_TX_OK;
4125 }
4126
4127 if (tso)
4128 tx_flags |= E1000_TX_FLAGS_TSO;
4129 else if (e1000_tx_csum(adapter, skb))
4130 tx_flags |= E1000_TX_FLAGS_CSUM;
4131
Bruce Allanad680762008-03-28 09:15:03 -07004132 /*
4133 * Old method was to assume IPv4 packet by default if TSO was enabled.
Auke Kokbc7f75f2007-09-17 12:30:59 -07004134 * 82571 hardware supports TSO capabilities for IPv6 as well...
Bruce Allanad680762008-03-28 09:15:03 -07004135 * no longer assume, we must.
4136 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004137 if (skb->protocol == htons(ETH_P_IP))
4138 tx_flags |= E1000_TX_FLAGS_IPV4;
4139
Alexander Duyck1b7719c2009-03-19 01:12:50 +00004140 /* if count is 0 then mapping error has occured */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004141 count = e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss);
Alexander Duyck1b7719c2009-03-19 01:12:50 +00004142 if (count) {
4143 e1000_tx_queue(adapter, tx_flags, count);
4144 netdev->trans_start = jiffies;
4145 /* Make sure there is space in the ring for the next send. */
4146 e1000_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 2);
4147
4148 } else {
Auke Kokbc7f75f2007-09-17 12:30:59 -07004149 dev_kfree_skb_any(skb);
Alexander Duyck1b7719c2009-03-19 01:12:50 +00004150 tx_ring->buffer_info[first].time_stamp = 0;
4151 tx_ring->next_to_use = first;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004152 }
4153
Auke Kokbc7f75f2007-09-17 12:30:59 -07004154 return NETDEV_TX_OK;
4155}
4156
4157/**
4158 * e1000_tx_timeout - Respond to a Tx Hang
4159 * @netdev: network interface device structure
4160 **/
4161static void e1000_tx_timeout(struct net_device *netdev)
4162{
4163 struct e1000_adapter *adapter = netdev_priv(netdev);
4164
4165 /* Do the reset outside of interrupt context */
4166 adapter->tx_timeout_count++;
4167 schedule_work(&adapter->reset_task);
4168}
4169
4170static void e1000_reset_task(struct work_struct *work)
4171{
4172 struct e1000_adapter *adapter;
4173 adapter = container_of(work, struct e1000_adapter, reset_task);
4174
4175 e1000e_reinit_locked(adapter);
4176}
4177
4178/**
4179 * e1000_get_stats - Get System Network Statistics
4180 * @netdev: network interface device structure
4181 *
4182 * Returns the address of the device statistics structure.
4183 * The statistics are actually updated from the timer callback.
4184 **/
4185static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
4186{
4187 struct e1000_adapter *adapter = netdev_priv(netdev);
4188
4189 /* only return the current stats */
4190 return &adapter->net_stats;
4191}
4192
4193/**
4194 * e1000_change_mtu - Change the Maximum Transfer Unit
4195 * @netdev: network interface device structure
4196 * @new_mtu: new value for maximum frame size
4197 *
4198 * Returns 0 on success, negative on failure
4199 **/
4200static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
4201{
4202 struct e1000_adapter *adapter = netdev_priv(netdev);
4203 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4204
Bruce Alland53f7062008-08-08 18:36:06 -07004205 if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
Auke Kokbc7f75f2007-09-17 12:30:59 -07004206 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004207 e_err("Invalid MTU setting\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07004208 return -EINVAL;
4209 }
4210
4211 /* Jumbo frame size limits */
4212 if (max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) {
4213 if (!(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004214 e_err("Jumbo Frames not supported.\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07004215 return -EINVAL;
4216 }
4217 if (adapter->hw.phy.type == e1000_phy_ife) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004218 e_err("Jumbo Frames not supported.\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07004219 return -EINVAL;
4220 }
4221 }
4222
4223#define MAX_STD_JUMBO_FRAME_SIZE 9234
4224 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004225 e_err("MTU > 9216 not supported.\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07004226 return -EINVAL;
4227 }
4228
4229 while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
4230 msleep(1);
4231 /* e1000e_down has a dependency on max_frame_size */
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004232 adapter->max_frame_size = max_frame;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004233 if (netif_running(netdev))
4234 e1000e_down(adapter);
4235
Bruce Allanad680762008-03-28 09:15:03 -07004236 /*
4237 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
Auke Kokbc7f75f2007-09-17 12:30:59 -07004238 * means we reserve 2 more, this pushes us to allocate from the next
4239 * larger slab size.
Bruce Allanad680762008-03-28 09:15:03 -07004240 * i.e. RXBUFFER_2048 --> size-4096 slab
Bruce Allan97ac8ca2008-04-29 09:16:05 -07004241 * However with the new *_jumbo_rx* routines, jumbo receives will use
4242 * fragmented skbs
Bruce Allanad680762008-03-28 09:15:03 -07004243 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004244
4245 if (max_frame <= 256)
4246 adapter->rx_buffer_len = 256;
4247 else if (max_frame <= 512)
4248 adapter->rx_buffer_len = 512;
4249 else if (max_frame <= 1024)
4250 adapter->rx_buffer_len = 1024;
4251 else if (max_frame <= 2048)
4252 adapter->rx_buffer_len = 2048;
4253 else
4254 adapter->rx_buffer_len = 4096;
4255
4256 /* adjust allocation if LPE protects us, and we aren't using SBP */
4257 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
4258 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
4259 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
Bruce Allanad680762008-03-28 09:15:03 -07004260 + ETH_FCS_LEN;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004261
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004262 e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004263 netdev->mtu = new_mtu;
4264
4265 if (netif_running(netdev))
4266 e1000e_up(adapter);
4267 else
4268 e1000e_reset(adapter);
4269
4270 clear_bit(__E1000_RESETTING, &adapter->state);
4271
4272 return 0;
4273}
4274
4275static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4276 int cmd)
4277{
4278 struct e1000_adapter *adapter = netdev_priv(netdev);
4279 struct mii_ioctl_data *data = if_mii(ifr);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004280
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004281 if (adapter->hw.phy.media_type != e1000_media_type_copper)
Auke Kokbc7f75f2007-09-17 12:30:59 -07004282 return -EOPNOTSUPP;
4283
4284 switch (cmd) {
4285 case SIOCGMIIPHY:
4286 data->phy_id = adapter->hw.phy.addr;
4287 break;
4288 case SIOCGMIIREG:
4289 if (!capable(CAP_NET_ADMIN))
4290 return -EPERM;
Bruce Allan7c257692008-04-23 11:09:00 -07004291 switch (data->reg_num & 0x1F) {
4292 case MII_BMCR:
4293 data->val_out = adapter->phy_regs.bmcr;
4294 break;
4295 case MII_BMSR:
4296 data->val_out = adapter->phy_regs.bmsr;
4297 break;
4298 case MII_PHYSID1:
4299 data->val_out = (adapter->hw.phy.id >> 16);
4300 break;
4301 case MII_PHYSID2:
4302 data->val_out = (adapter->hw.phy.id & 0xFFFF);
4303 break;
4304 case MII_ADVERTISE:
4305 data->val_out = adapter->phy_regs.advertise;
4306 break;
4307 case MII_LPA:
4308 data->val_out = adapter->phy_regs.lpa;
4309 break;
4310 case MII_EXPANSION:
4311 data->val_out = adapter->phy_regs.expansion;
4312 break;
4313 case MII_CTRL1000:
4314 data->val_out = adapter->phy_regs.ctrl1000;
4315 break;
4316 case MII_STAT1000:
4317 data->val_out = adapter->phy_regs.stat1000;
4318 break;
4319 case MII_ESTATUS:
4320 data->val_out = adapter->phy_regs.estatus;
4321 break;
4322 default:
Auke Kokbc7f75f2007-09-17 12:30:59 -07004323 return -EIO;
4324 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07004325 break;
4326 case SIOCSMIIREG:
4327 default:
4328 return -EOPNOTSUPP;
4329 }
4330 return 0;
4331}
4332
4333static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4334{
4335 switch (cmd) {
4336 case SIOCGMIIPHY:
4337 case SIOCGMIIREG:
4338 case SIOCSMIIREG:
4339 return e1000_mii_ioctl(netdev, ifr, cmd);
4340 default:
4341 return -EOPNOTSUPP;
4342 }
4343}
4344
4345static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4346{
4347 struct net_device *netdev = pci_get_drvdata(pdev);
4348 struct e1000_adapter *adapter = netdev_priv(netdev);
4349 struct e1000_hw *hw = &adapter->hw;
4350 u32 ctrl, ctrl_ext, rctl, status;
4351 u32 wufc = adapter->wol;
4352 int retval = 0;
4353
4354 netif_device_detach(netdev);
4355
4356 if (netif_running(netdev)) {
4357 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
4358 e1000e_down(adapter);
4359 e1000_free_irq(adapter);
4360 }
Bruce Allan4662e822008-08-26 18:37:06 -07004361 e1000e_reset_interrupt_capability(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004362
4363 retval = pci_save_state(pdev);
4364 if (retval)
4365 return retval;
4366
4367 status = er32(STATUS);
4368 if (status & E1000_STATUS_LU)
4369 wufc &= ~E1000_WUFC_LNKC;
4370
4371 if (wufc) {
4372 e1000_setup_rctl(adapter);
4373 e1000_set_multi(netdev);
4374
4375 /* turn on all-multi mode if wake on multicast is enabled */
4376 if (wufc & E1000_WUFC_MC) {
4377 rctl = er32(RCTL);
4378 rctl |= E1000_RCTL_MPE;
4379 ew32(RCTL, rctl);
4380 }
4381
4382 ctrl = er32(CTRL);
4383 /* advertise wake from D3Cold */
4384 #define E1000_CTRL_ADVD3WUC 0x00100000
4385 /* phy power management enable */
4386 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4387 ctrl |= E1000_CTRL_ADVD3WUC |
4388 E1000_CTRL_EN_PHY_PWR_MGMT;
4389 ew32(CTRL, ctrl);
4390
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004391 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
4392 adapter->hw.phy.media_type ==
4393 e1000_media_type_internal_serdes) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07004394 /* keep the laser running in D3 */
4395 ctrl_ext = er32(CTRL_EXT);
4396 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4397 ew32(CTRL_EXT, ctrl_ext);
4398 }
4399
Bruce Allan97ac8ca2008-04-29 09:16:05 -07004400 if (adapter->flags & FLAG_IS_ICH)
4401 e1000e_disable_gig_wol_ich8lan(&adapter->hw);
4402
Auke Kokbc7f75f2007-09-17 12:30:59 -07004403 /* Allow time for pending master requests to run */
4404 e1000e_disable_pcie_master(&adapter->hw);
4405
4406 ew32(WUC, E1000_WUC_PME_EN);
4407 ew32(WUFC, wufc);
4408 pci_enable_wake(pdev, PCI_D3hot, 1);
4409 pci_enable_wake(pdev, PCI_D3cold, 1);
4410 } else {
4411 ew32(WUC, 0);
4412 ew32(WUFC, 0);
4413 pci_enable_wake(pdev, PCI_D3hot, 0);
4414 pci_enable_wake(pdev, PCI_D3cold, 0);
4415 }
4416
Auke Kokbc7f75f2007-09-17 12:30:59 -07004417 /* make sure adapter isn't asleep if manageability is enabled */
4418 if (adapter->flags & FLAG_MNG_PT_ENABLED) {
4419 pci_enable_wake(pdev, PCI_D3hot, 1);
4420 pci_enable_wake(pdev, PCI_D3cold, 1);
4421 }
4422
4423 if (adapter->hw.phy.type == e1000_phy_igp_3)
4424 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
4425
Bruce Allanad680762008-03-28 09:15:03 -07004426 /*
4427 * Release control of h/w to f/w. If f/w is AMT enabled, this
4428 * would have already happened in close and is redundant.
4429 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004430 e1000_release_hw_control(adapter);
4431
4432 pci_disable_device(pdev);
4433
Alexander Duyck005cbdf2008-11-21 16:49:10 -08004434 /*
4435 * The pci-e switch on some quad port adapters will report a
4436 * correctable error when the MAC transitions from D0 to D3. To
4437 * prevent this we need to mask off the correctable errors on the
4438 * downstream port of the pci-e switch.
4439 */
4440 if (adapter->flags & FLAG_IS_QUAD_PORT) {
4441 struct pci_dev *us_dev = pdev->bus->self;
4442 int pos = pci_find_capability(us_dev, PCI_CAP_ID_EXP);
4443 u16 devctl;
4444
4445 pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
4446 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
4447 (devctl & ~PCI_EXP_DEVCTL_CERE));
4448
4449 pci_set_power_state(pdev, pci_choose_state(pdev, state));
4450
4451 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
4452 } else {
4453 pci_set_power_state(pdev, pci_choose_state(pdev, state));
4454 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07004455
4456 return 0;
4457}
4458
Auke Kok1eae4eb2007-10-31 15:22:00 -07004459static void e1000e_disable_l1aspm(struct pci_dev *pdev)
4460{
4461 int pos;
Auke Kok1eae4eb2007-10-31 15:22:00 -07004462 u16 val;
4463
4464 /*
4465 * 82573 workaround - disable L1 ASPM on mobile chipsets
4466 *
4467 * L1 ASPM on various mobile (ich7) chipsets do not behave properly
4468 * resulting in lost data or garbage information on the pci-e link
4469 * level. This could result in (false) bad EEPROM checksum errors,
4470 * long ping times (up to 2s) or even a system freeze/hang.
4471 *
4472 * Unfortunately this feature saves about 1W power consumption when
4473 * active.
4474 */
4475 pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
Auke Kok1eae4eb2007-10-31 15:22:00 -07004476 pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &val);
4477 if (val & 0x2) {
4478 dev_warn(&pdev->dev, "Disabling L1 ASPM\n");
4479 val &= ~0x2;
4480 pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, val);
4481 }
4482}
4483
Auke Kokbc7f75f2007-09-17 12:30:59 -07004484#ifdef CONFIG_PM
4485static int e1000_resume(struct pci_dev *pdev)
4486{
4487 struct net_device *netdev = pci_get_drvdata(pdev);
4488 struct e1000_adapter *adapter = netdev_priv(netdev);
4489 struct e1000_hw *hw = &adapter->hw;
4490 u32 err;
4491
4492 pci_set_power_state(pdev, PCI_D0);
4493 pci_restore_state(pdev);
Auke Kok1eae4eb2007-10-31 15:22:00 -07004494 e1000e_disable_l1aspm(pdev);
Taku Izumi6e4f6f62008-06-20 11:57:02 +09004495
Bruce Allanf0f422e2008-08-04 17:21:53 -07004496 err = pci_enable_device_mem(pdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004497 if (err) {
4498 dev_err(&pdev->dev,
4499 "Cannot enable PCI device from suspend\n");
4500 return err;
4501 }
4502
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00004503 /* AER (Advanced Error Reporting) hooks */
4504 err = pci_enable_pcie_error_reporting(pdev);
4505 if (err) {
4506 dev_err(&pdev->dev, "pci_enable_pcie_error_reporting failed "
4507 "0x%x\n", err);
4508 /* non-fatal, continue */
4509 }
4510
Auke Kokbc7f75f2007-09-17 12:30:59 -07004511 pci_set_master(pdev);
4512
4513 pci_enable_wake(pdev, PCI_D3hot, 0);
4514 pci_enable_wake(pdev, PCI_D3cold, 0);
4515
Bruce Allan4662e822008-08-26 18:37:06 -07004516 e1000e_set_interrupt_capability(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004517 if (netif_running(netdev)) {
4518 err = e1000_request_irq(adapter);
4519 if (err)
4520 return err;
4521 }
4522
4523 e1000e_power_up_phy(adapter);
4524 e1000e_reset(adapter);
4525 ew32(WUS, ~0);
4526
4527 e1000_init_manageability(adapter);
4528
4529 if (netif_running(netdev))
4530 e1000e_up(adapter);
4531
4532 netif_device_attach(netdev);
4533
Bruce Allanad680762008-03-28 09:15:03 -07004534 /*
4535 * If the controller has AMT, do not set DRV_LOAD until the interface
Auke Kokbc7f75f2007-09-17 12:30:59 -07004536 * is up. For all other cases, let the f/w know that the h/w is now
Bruce Allanad680762008-03-28 09:15:03 -07004537 * under the control of the driver.
4538 */
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07004539 if (!(adapter->flags & FLAG_HAS_AMT))
Auke Kokbc7f75f2007-09-17 12:30:59 -07004540 e1000_get_hw_control(adapter);
4541
4542 return 0;
4543}
4544#endif
4545
4546static void e1000_shutdown(struct pci_dev *pdev)
4547{
4548 e1000_suspend(pdev, PMSG_SUSPEND);
4549}
4550
4551#ifdef CONFIG_NET_POLL_CONTROLLER
4552/*
4553 * Polling 'interrupt' - used by things like netconsole to send skbs
4554 * without having to re-enable interrupts. It's not called while
4555 * the interrupt routine is executing.
4556 */
4557static void e1000_netpoll(struct net_device *netdev)
4558{
4559 struct e1000_adapter *adapter = netdev_priv(netdev);
4560
4561 disable_irq(adapter->pdev->irq);
4562 e1000_intr(adapter->pdev->irq, netdev);
4563
Auke Kokbc7f75f2007-09-17 12:30:59 -07004564 enable_irq(adapter->pdev->irq);
4565}
4566#endif
4567
4568/**
4569 * e1000_io_error_detected - called when PCI error is detected
4570 * @pdev: Pointer to PCI device
4571 * @state: The current pci connection state
4572 *
4573 * This function is called after a PCI bus error affecting
4574 * this device has been detected.
4575 */
4576static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4577 pci_channel_state_t state)
4578{
4579 struct net_device *netdev = pci_get_drvdata(pdev);
4580 struct e1000_adapter *adapter = netdev_priv(netdev);
4581
4582 netif_device_detach(netdev);
4583
4584 if (netif_running(netdev))
4585 e1000e_down(adapter);
4586 pci_disable_device(pdev);
4587
4588 /* Request a slot slot reset. */
4589 return PCI_ERS_RESULT_NEED_RESET;
4590}
4591
4592/**
4593 * e1000_io_slot_reset - called after the pci bus has been reset.
4594 * @pdev: Pointer to PCI device
4595 *
4596 * Restart the card from scratch, as if from a cold-boot. Implementation
4597 * resembles the first-half of the e1000_resume routine.
4598 */
4599static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4600{
4601 struct net_device *netdev = pci_get_drvdata(pdev);
4602 struct e1000_adapter *adapter = netdev_priv(netdev);
4603 struct e1000_hw *hw = &adapter->hw;
Taku Izumi6e4f6f62008-06-20 11:57:02 +09004604 int err;
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00004605 pci_ers_result_t result;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004606
Auke Kok1eae4eb2007-10-31 15:22:00 -07004607 e1000e_disable_l1aspm(pdev);
Bruce Allanf0f422e2008-08-04 17:21:53 -07004608 err = pci_enable_device_mem(pdev);
Taku Izumi6e4f6f62008-06-20 11:57:02 +09004609 if (err) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07004610 dev_err(&pdev->dev,
4611 "Cannot re-enable PCI device after reset.\n");
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00004612 result = PCI_ERS_RESULT_DISCONNECT;
4613 } else {
4614 pci_set_master(pdev);
4615 pci_restore_state(pdev);
4616
4617 pci_enable_wake(pdev, PCI_D3hot, 0);
4618 pci_enable_wake(pdev, PCI_D3cold, 0);
4619
4620 e1000e_reset(adapter);
4621 ew32(WUS, ~0);
4622 result = PCI_ERS_RESULT_RECOVERED;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004623 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07004624
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00004625 pci_cleanup_aer_uncorrect_error_status(pdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004626
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00004627 return result;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004628}
4629
4630/**
4631 * e1000_io_resume - called when traffic can start flowing again.
4632 * @pdev: Pointer to PCI device
4633 *
4634 * This callback is called when the error recovery driver tells us that
4635 * its OK to resume normal operation. Implementation resembles the
4636 * second-half of the e1000_resume routine.
4637 */
4638static void e1000_io_resume(struct pci_dev *pdev)
4639{
4640 struct net_device *netdev = pci_get_drvdata(pdev);
4641 struct e1000_adapter *adapter = netdev_priv(netdev);
4642
4643 e1000_init_manageability(adapter);
4644
4645 if (netif_running(netdev)) {
4646 if (e1000e_up(adapter)) {
4647 dev_err(&pdev->dev,
4648 "can't bring device back up after reset\n");
4649 return;
4650 }
4651 }
4652
4653 netif_device_attach(netdev);
4654
Bruce Allanad680762008-03-28 09:15:03 -07004655 /*
4656 * If the controller has AMT, do not set DRV_LOAD until the interface
Auke Kokbc7f75f2007-09-17 12:30:59 -07004657 * is up. For all other cases, let the f/w know that the h/w is now
Bruce Allanad680762008-03-28 09:15:03 -07004658 * under the control of the driver.
4659 */
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07004660 if (!(adapter->flags & FLAG_HAS_AMT))
Auke Kokbc7f75f2007-09-17 12:30:59 -07004661 e1000_get_hw_control(adapter);
4662
4663}
4664
4665static void e1000_print_device_info(struct e1000_adapter *adapter)
4666{
4667 struct e1000_hw *hw = &adapter->hw;
4668 struct net_device *netdev = adapter->netdev;
Jeff Kirsher69e3fd82008-04-02 13:48:18 -07004669 u32 pba_num;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004670
4671 /* print bus type/speed/width info */
Johannes Berg7c510e42008-10-27 17:47:26 -07004672 e_info("(PCI Express:2.5GB/s:%s) %pM\n",
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004673 /* bus width */
4674 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
4675 "Width x1"),
4676 /* MAC address */
Johannes Berg7c510e42008-10-27 17:47:26 -07004677 netdev->dev_addr);
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004678 e_info("Intel(R) PRO/%s Network Connection\n",
4679 (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
Jeff Kirsher69e3fd82008-04-02 13:48:18 -07004680 e1000e_read_pba_num(hw, &pba_num);
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004681 e_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
4682 hw->mac.type, hw->phy.type, (pba_num >> 8), (pba_num & 0xff));
Auke Kokbc7f75f2007-09-17 12:30:59 -07004683}
4684
Auke Kok10aa4c02008-08-04 17:21:20 -07004685static void e1000_eeprom_checks(struct e1000_adapter *adapter)
4686{
4687 struct e1000_hw *hw = &adapter->hw;
4688 int ret_val;
4689 u16 buf = 0;
4690
4691 if (hw->mac.type != e1000_82573)
4692 return;
4693
4694 ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
Bruce Allane2434552008-11-21 17:02:41 -08004695 if (!ret_val && (!(le16_to_cpu(buf) & (1 << 0)))) {
Auke Kok10aa4c02008-08-04 17:21:20 -07004696 /* Deep Smart Power Down (DSPD) */
Frans Pop6c2a9ef2008-09-22 14:52:22 -07004697 dev_warn(&adapter->pdev->dev,
4698 "Warning: detected DSPD enabled in EEPROM\n");
Auke Kok10aa4c02008-08-04 17:21:20 -07004699 }
4700
4701 ret_val = e1000_read_nvm(hw, NVM_INIT_3GIO_3, 1, &buf);
Bruce Allane2434552008-11-21 17:02:41 -08004702 if (!ret_val && (le16_to_cpu(buf) & (3 << 2))) {
Auke Kok10aa4c02008-08-04 17:21:20 -07004703 /* ASPM enable */
Frans Pop6c2a9ef2008-09-22 14:52:22 -07004704 dev_warn(&adapter->pdev->dev,
4705 "Warning: detected ASPM enabled in EEPROM\n");
Auke Kok10aa4c02008-08-04 17:21:20 -07004706 }
4707}
4708
Stephen Hemminger651c2462008-11-19 21:57:48 -08004709static const struct net_device_ops e1000e_netdev_ops = {
4710 .ndo_open = e1000_open,
4711 .ndo_stop = e1000_close,
Stephen Hemminger00829822008-11-20 20:14:53 -08004712 .ndo_start_xmit = e1000_xmit_frame,
Stephen Hemminger651c2462008-11-19 21:57:48 -08004713 .ndo_get_stats = e1000_get_stats,
4714 .ndo_set_multicast_list = e1000_set_multi,
4715 .ndo_set_mac_address = e1000_set_mac,
4716 .ndo_change_mtu = e1000_change_mtu,
4717 .ndo_do_ioctl = e1000_ioctl,
4718 .ndo_tx_timeout = e1000_tx_timeout,
4719 .ndo_validate_addr = eth_validate_addr,
4720
4721 .ndo_vlan_rx_register = e1000_vlan_rx_register,
4722 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
4723 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
4724#ifdef CONFIG_NET_POLL_CONTROLLER
4725 .ndo_poll_controller = e1000_netpoll,
4726#endif
4727};
4728
Auke Kokbc7f75f2007-09-17 12:30:59 -07004729/**
4730 * e1000_probe - Device Initialization Routine
4731 * @pdev: PCI device information struct
4732 * @ent: entry in e1000_pci_tbl
4733 *
4734 * Returns 0 on success, negative on failure
4735 *
4736 * e1000_probe initializes an adapter identified by a pci_dev structure.
4737 * The OS initialization, configuring of the adapter private structure,
4738 * and a hardware reset occur.
4739 **/
4740static int __devinit e1000_probe(struct pci_dev *pdev,
4741 const struct pci_device_id *ent)
4742{
4743 struct net_device *netdev;
4744 struct e1000_adapter *adapter;
4745 struct e1000_hw *hw;
4746 const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
Becky Brucef47e81f2008-05-01 18:03:11 -05004747 resource_size_t mmio_start, mmio_len;
4748 resource_size_t flash_start, flash_len;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004749
4750 static int cards_found;
4751 int i, err, pci_using_dac;
4752 u16 eeprom_data = 0;
4753 u16 eeprom_apme_mask = E1000_EEPROM_APME;
4754
Auke Kok1eae4eb2007-10-31 15:22:00 -07004755 e1000e_disable_l1aspm(pdev);
Taku Izumi6e4f6f62008-06-20 11:57:02 +09004756
Bruce Allanf0f422e2008-08-04 17:21:53 -07004757 err = pci_enable_device_mem(pdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004758 if (err)
4759 return err;
4760
4761 pci_using_dac = 0;
4762 err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
4763 if (!err) {
4764 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
4765 if (!err)
4766 pci_using_dac = 1;
4767 } else {
4768 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
4769 if (err) {
4770 err = pci_set_consistent_dma_mask(pdev,
4771 DMA_32BIT_MASK);
4772 if (err) {
4773 dev_err(&pdev->dev, "No usable DMA "
4774 "configuration, aborting\n");
4775 goto err_dma;
4776 }
4777 }
4778 }
4779
Arjan van de Vene8de1482008-10-22 19:55:31 -07004780 err = pci_request_selected_regions_exclusive(pdev,
Bruce Allanf0f422e2008-08-04 17:21:53 -07004781 pci_select_bars(pdev, IORESOURCE_MEM),
4782 e1000e_driver_name);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004783 if (err)
4784 goto err_pci_reg;
4785
4786 pci_set_master(pdev);
Bruce Allan438b3652008-11-21 16:51:33 -08004787 /* PCI config space info */
4788 err = pci_save_state(pdev);
4789 if (err)
4790 goto err_alloc_etherdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004791
4792 err = -ENOMEM;
4793 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
4794 if (!netdev)
4795 goto err_alloc_etherdev;
4796
Auke Kokbc7f75f2007-09-17 12:30:59 -07004797 SET_NETDEV_DEV(netdev, &pdev->dev);
4798
4799 pci_set_drvdata(pdev, netdev);
4800 adapter = netdev_priv(netdev);
4801 hw = &adapter->hw;
4802 adapter->netdev = netdev;
4803 adapter->pdev = pdev;
4804 adapter->ei = ei;
4805 adapter->pba = ei->pba;
4806 adapter->flags = ei->flags;
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +00004807 adapter->flags2 = ei->flags2;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004808 adapter->hw.adapter = adapter;
4809 adapter->hw.mac.type = ei->mac;
4810 adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
4811
4812 mmio_start = pci_resource_start(pdev, 0);
4813 mmio_len = pci_resource_len(pdev, 0);
4814
4815 err = -EIO;
4816 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
4817 if (!adapter->hw.hw_addr)
4818 goto err_ioremap;
4819
4820 if ((adapter->flags & FLAG_HAS_FLASH) &&
4821 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
4822 flash_start = pci_resource_start(pdev, 1);
4823 flash_len = pci_resource_len(pdev, 1);
4824 adapter->hw.flash_address = ioremap(flash_start, flash_len);
4825 if (!adapter->hw.flash_address)
4826 goto err_flashmap;
4827 }
4828
4829 /* construct the net_device struct */
Stephen Hemminger651c2462008-11-19 21:57:48 -08004830 netdev->netdev_ops = &e1000e_netdev_ops;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004831 e1000e_set_ethtool_ops(netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004832 netdev->watchdog_timeo = 5 * HZ;
4833 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004834 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
4835
4836 netdev->mem_start = mmio_start;
4837 netdev->mem_end = mmio_start + mmio_len;
4838
4839 adapter->bd_number = cards_found++;
4840
Bruce Allan4662e822008-08-26 18:37:06 -07004841 e1000e_check_options(adapter);
4842
Auke Kokbc7f75f2007-09-17 12:30:59 -07004843 /* setup adapter struct */
4844 err = e1000_sw_init(adapter);
4845 if (err)
4846 goto err_sw_init;
4847
4848 err = -EIO;
4849
4850 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
4851 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
4852 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
4853
Jeff Kirsher69e3fd82008-04-02 13:48:18 -07004854 err = ei->get_variants(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004855 if (err)
4856 goto err_hw_init;
4857
Bruce Allan4a770352008-10-01 17:18:35 -07004858 if ((adapter->flags & FLAG_IS_ICH) &&
4859 (adapter->flags & FLAG_READ_ONLY_NVM))
4860 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
4861
Auke Kokbc7f75f2007-09-17 12:30:59 -07004862 hw->mac.ops.get_bus_info(&adapter->hw);
4863
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004864 adapter->hw.phy.autoneg_wait_to_complete = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004865
4866 /* Copper options */
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004867 if (adapter->hw.phy.media_type == e1000_media_type_copper) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07004868 adapter->hw.phy.mdix = AUTO_ALL_MODES;
4869 adapter->hw.phy.disable_polarity_correction = 0;
4870 adapter->hw.phy.ms_type = e1000_ms_hw_default;
4871 }
4872
4873 if (e1000_check_reset_block(&adapter->hw))
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004874 e_info("PHY reset is blocked due to SOL/IDER session.\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07004875
4876 netdev->features = NETIF_F_SG |
4877 NETIF_F_HW_CSUM |
4878 NETIF_F_HW_VLAN_TX |
4879 NETIF_F_HW_VLAN_RX;
4880
4881 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
4882 netdev->features |= NETIF_F_HW_VLAN_FILTER;
4883
4884 netdev->features |= NETIF_F_TSO;
4885 netdev->features |= NETIF_F_TSO6;
4886
Jeff Kirshera5136e22008-06-05 04:07:28 -07004887 netdev->vlan_features |= NETIF_F_TSO;
4888 netdev->vlan_features |= NETIF_F_TSO6;
4889 netdev->vlan_features |= NETIF_F_HW_CSUM;
4890 netdev->vlan_features |= NETIF_F_SG;
4891
Auke Kokbc7f75f2007-09-17 12:30:59 -07004892 if (pci_using_dac)
4893 netdev->features |= NETIF_F_HIGHDMA;
4894
Auke Kokbc7f75f2007-09-17 12:30:59 -07004895 if (e1000e_enable_mng_pass_thru(&adapter->hw))
4896 adapter->flags |= FLAG_MNG_PT_ENABLED;
4897
Bruce Allanad680762008-03-28 09:15:03 -07004898 /*
4899 * before reading the NVM, reset the controller to
4900 * put the device in a known good starting state
4901 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004902 adapter->hw.mac.ops.reset_hw(&adapter->hw);
4903
4904 /*
4905 * systems with ASPM and others may see the checksum fail on the first
4906 * attempt. Let's give it a few tries
4907 */
4908 for (i = 0;; i++) {
4909 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
4910 break;
4911 if (i == 2) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004912 e_err("The NVM Checksum Is Not Valid\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07004913 err = -EIO;
4914 goto err_eeprom;
4915 }
4916 }
4917
Auke Kok10aa4c02008-08-04 17:21:20 -07004918 e1000_eeprom_checks(adapter);
4919
Auke Kokbc7f75f2007-09-17 12:30:59 -07004920 /* copy the MAC address out of the NVM */
4921 if (e1000e_read_mac_addr(&adapter->hw))
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004922 e_err("NVM Read Error while reading MAC address\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07004923
4924 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
4925 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
4926
4927 if (!is_valid_ether_addr(netdev->perm_addr)) {
Johannes Berg7c510e42008-10-27 17:47:26 -07004928 e_err("Invalid MAC Address: %pM\n", netdev->perm_addr);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004929 err = -EIO;
4930 goto err_eeprom;
4931 }
4932
4933 init_timer(&adapter->watchdog_timer);
4934 adapter->watchdog_timer.function = &e1000_watchdog;
4935 adapter->watchdog_timer.data = (unsigned long) adapter;
4936
4937 init_timer(&adapter->phy_info_timer);
4938 adapter->phy_info_timer.function = &e1000_update_phy_info;
4939 adapter->phy_info_timer.data = (unsigned long) adapter;
4940
4941 INIT_WORK(&adapter->reset_task, e1000_reset_task);
4942 INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07004943 INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
4944 INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004945
Auke Kokbc7f75f2007-09-17 12:30:59 -07004946 /* Initialize link parameters. User can change them with ethtool */
4947 adapter->hw.mac.autoneg = 1;
Auke Kok309af402007-10-05 15:22:02 -07004948 adapter->fc_autoneg = 1;
Bruce Allan5c48ef3e22008-11-21 16:57:36 -08004949 adapter->hw.fc.requested_mode = e1000_fc_default;
4950 adapter->hw.fc.current_mode = e1000_fc_default;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004951 adapter->hw.phy.autoneg_advertised = 0x2f;
4952
4953 /* ring size defaults */
4954 adapter->rx_ring->count = 256;
4955 adapter->tx_ring->count = 256;
4956
4957 /*
4958 * Initial Wake on LAN setting - If APM wake is enabled in
4959 * the EEPROM, enable the ACPI Magic Packet filter
4960 */
4961 if (adapter->flags & FLAG_APME_IN_WUC) {
4962 /* APME bit in EEPROM is mapped to WUC.APME */
4963 eeprom_data = er32(WUC);
4964 eeprom_apme_mask = E1000_WUC_APME;
4965 } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
4966 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
4967 (adapter->hw.bus.func == 1))
4968 e1000_read_nvm(&adapter->hw,
4969 NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
4970 else
4971 e1000_read_nvm(&adapter->hw,
4972 NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
4973 }
4974
4975 /* fetch WoL from EEPROM */
4976 if (eeprom_data & eeprom_apme_mask)
4977 adapter->eeprom_wol |= E1000_WUFC_MAG;
4978
4979 /*
4980 * now that we have the eeprom settings, apply the special cases
4981 * where the eeprom may be wrong or the board simply won't support
4982 * wake on lan on a particular port
4983 */
4984 if (!(adapter->flags & FLAG_HAS_WOL))
4985 adapter->eeprom_wol = 0;
4986
4987 /* initialize the wol settings based on the eeprom settings */
4988 adapter->wol = adapter->eeprom_wol;
\"Rafael J. Wysocki\6ff68022008-11-12 09:52:32 +00004989 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004990
Bruce Allan84527592008-11-21 17:00:22 -08004991 /* save off EEPROM version number */
4992 e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
4993
Auke Kokbc7f75f2007-09-17 12:30:59 -07004994 /* reset the hardware with the new settings */
4995 e1000e_reset(adapter);
4996
Bruce Allanad680762008-03-28 09:15:03 -07004997 /*
4998 * If the controller has AMT, do not set DRV_LOAD until the interface
Auke Kokbc7f75f2007-09-17 12:30:59 -07004999 * is up. For all other cases, let the f/w know that the h/w is now
Bruce Allanad680762008-03-28 09:15:03 -07005000 * under the control of the driver.
5001 */
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07005002 if (!(adapter->flags & FLAG_HAS_AMT))
Auke Kokbc7f75f2007-09-17 12:30:59 -07005003 e1000_get_hw_control(adapter);
5004
5005 /* tell the stack to leave us alone until e1000_open() is called */
5006 netif_carrier_off(netdev);
Jeff Kirsherd55b53f2008-07-18 04:33:03 -07005007 netif_tx_stop_all_queues(netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005008
5009 strcpy(netdev->name, "eth%d");
5010 err = register_netdev(netdev);
5011 if (err)
5012 goto err_register;
5013
5014 e1000_print_device_info(adapter);
5015
5016 return 0;
5017
5018err_register:
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07005019 if (!(adapter->flags & FLAG_HAS_AMT))
5020 e1000_release_hw_control(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005021err_eeprom:
5022 if (!e1000_check_reset_block(&adapter->hw))
5023 e1000_phy_hw_reset(&adapter->hw);
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07005024err_hw_init:
Auke Kokbc7f75f2007-09-17 12:30:59 -07005025
Auke Kokbc7f75f2007-09-17 12:30:59 -07005026 kfree(adapter->tx_ring);
5027 kfree(adapter->rx_ring);
5028err_sw_init:
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07005029 if (adapter->hw.flash_address)
5030 iounmap(adapter->hw.flash_address);
Jeff Kirshere82f54b2008-11-14 06:45:07 +00005031 e1000e_reset_interrupt_capability(adapter);
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07005032err_flashmap:
Auke Kokbc7f75f2007-09-17 12:30:59 -07005033 iounmap(adapter->hw.hw_addr);
5034err_ioremap:
5035 free_netdev(netdev);
5036err_alloc_etherdev:
Bruce Allanf0f422e2008-08-04 17:21:53 -07005037 pci_release_selected_regions(pdev,
5038 pci_select_bars(pdev, IORESOURCE_MEM));
Auke Kokbc7f75f2007-09-17 12:30:59 -07005039err_pci_reg:
5040err_dma:
5041 pci_disable_device(pdev);
5042 return err;
5043}
5044
5045/**
5046 * e1000_remove - Device Removal Routine
5047 * @pdev: PCI device information struct
5048 *
5049 * e1000_remove is called by the PCI subsystem to alert the driver
5050 * that it should release a PCI device. The could be caused by a
5051 * Hot-Plug event, or because the driver is going to be removed from
5052 * memory.
5053 **/
5054static void __devexit e1000_remove(struct pci_dev *pdev)
5055{
5056 struct net_device *netdev = pci_get_drvdata(pdev);
5057 struct e1000_adapter *adapter = netdev_priv(netdev);
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00005058 int err;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005059
Bruce Allanad680762008-03-28 09:15:03 -07005060 /*
5061 * flush_scheduled work may reschedule our watchdog task, so
5062 * explicitly disable watchdog tasks from being rescheduled
5063 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005064 set_bit(__E1000_DOWN, &adapter->state);
5065 del_timer_sync(&adapter->watchdog_timer);
5066 del_timer_sync(&adapter->phy_info_timer);
5067
5068 flush_scheduled_work();
5069
Bruce Allanad680762008-03-28 09:15:03 -07005070 /*
5071 * Release control of h/w to f/w. If f/w is AMT enabled, this
5072 * would have already happened in close and is redundant.
5073 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005074 e1000_release_hw_control(adapter);
5075
5076 unregister_netdev(netdev);
5077
5078 if (!e1000_check_reset_block(&adapter->hw))
5079 e1000_phy_hw_reset(&adapter->hw);
5080
Bruce Allan4662e822008-08-26 18:37:06 -07005081 e1000e_reset_interrupt_capability(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005082 kfree(adapter->tx_ring);
5083 kfree(adapter->rx_ring);
5084
5085 iounmap(adapter->hw.hw_addr);
5086 if (adapter->hw.flash_address)
5087 iounmap(adapter->hw.flash_address);
Bruce Allanf0f422e2008-08-04 17:21:53 -07005088 pci_release_selected_regions(pdev,
5089 pci_select_bars(pdev, IORESOURCE_MEM));
Auke Kokbc7f75f2007-09-17 12:30:59 -07005090
5091 free_netdev(netdev);
5092
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00005093 /* AER disable */
5094 err = pci_disable_pcie_error_reporting(pdev);
5095 if (err)
5096 dev_err(&pdev->dev,
5097 "pci_disable_pcie_error_reporting failed 0x%x\n", err);
5098
Auke Kokbc7f75f2007-09-17 12:30:59 -07005099 pci_disable_device(pdev);
5100}
5101
5102/* PCI Error Recovery (ERS) */
5103static struct pci_error_handlers e1000_err_handler = {
5104 .error_detected = e1000_io_error_detected,
5105 .slot_reset = e1000_io_slot_reset,
5106 .resume = e1000_io_resume,
5107};
5108
5109static struct pci_device_id e1000_pci_tbl[] = {
Auke Kokbc7f75f2007-09-17 12:30:59 -07005110 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
5111 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
5112 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
5113 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
5114 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
5115 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
Auke Kok040babf2007-10-31 15:22:05 -07005116 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
5117 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
5118 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
Bruce Allanad680762008-03-28 09:15:03 -07005119
Auke Kokbc7f75f2007-09-17 12:30:59 -07005120 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
5121 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
5122 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
5123 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
Bruce Allanad680762008-03-28 09:15:03 -07005124
Auke Kokbc7f75f2007-09-17 12:30:59 -07005125 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
5126 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
5127 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
Bruce Allanad680762008-03-28 09:15:03 -07005128
Bruce Allan4662e822008-08-26 18:37:06 -07005129 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
Bruce Allanbef28b12009-03-24 23:28:02 -07005130 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
Alexander Duyck8c81c9c2009-03-19 01:12:27 +00005131 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
Bruce Allan4662e822008-08-26 18:37:06 -07005132
Auke Kokbc7f75f2007-09-17 12:30:59 -07005133 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
5134 board_80003es2lan },
5135 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
5136 board_80003es2lan },
5137 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
5138 board_80003es2lan },
5139 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
5140 board_80003es2lan },
Bruce Allanad680762008-03-28 09:15:03 -07005141
Auke Kokbc7f75f2007-09-17 12:30:59 -07005142 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
5143 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
5144 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
5145 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
5146 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
5147 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
5148 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
Bruce Allanad680762008-03-28 09:15:03 -07005149
Auke Kokbc7f75f2007-09-17 12:30:59 -07005150 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
5151 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
5152 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
5153 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
5154 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
Bruce Allan2f15f9d2008-08-26 18:36:36 -07005155 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
Bruce Allan97ac8ca2008-04-29 09:16:05 -07005156 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
5157 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
5158 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
5159
5160 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
5161 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
5162 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
Auke Kokbc7f75f2007-09-17 12:30:59 -07005163
Bruce Allanf4187b52008-08-26 18:36:50 -07005164 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
5165 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
5166
Auke Kokbc7f75f2007-09-17 12:30:59 -07005167 { } /* terminate list */
5168};
5169MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
5170
5171/* PCI Device API Driver */
5172static struct pci_driver e1000_driver = {
5173 .name = e1000e_driver_name,
5174 .id_table = e1000_pci_tbl,
5175 .probe = e1000_probe,
5176 .remove = __devexit_p(e1000_remove),
5177#ifdef CONFIG_PM
Bruce Allanad680762008-03-28 09:15:03 -07005178 /* Power Management Hooks */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005179 .suspend = e1000_suspend,
5180 .resume = e1000_resume,
5181#endif
5182 .shutdown = e1000_shutdown,
5183 .err_handler = &e1000_err_handler
5184};
5185
5186/**
5187 * e1000_init_module - Driver Registration Routine
5188 *
5189 * e1000_init_module is the first routine called when the driver is
5190 * loaded. All it does is register with the PCI subsystem.
5191 **/
5192static int __init e1000_init_module(void)
5193{
5194 int ret;
5195 printk(KERN_INFO "%s: Intel(R) PRO/1000 Network Driver - %s\n",
5196 e1000e_driver_name, e1000e_driver_version);
Bruce Allanad680762008-03-28 09:15:03 -07005197 printk(KERN_INFO "%s: Copyright (c) 1999-2008 Intel Corporation.\n",
Auke Kokbc7f75f2007-09-17 12:30:59 -07005198 e1000e_driver_name);
5199 ret = pci_register_driver(&e1000_driver);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07005200 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, e1000e_driver_name,
5201 PM_QOS_DEFAULT_VALUE);
5202
Auke Kokbc7f75f2007-09-17 12:30:59 -07005203 return ret;
5204}
5205module_init(e1000_init_module);
5206
5207/**
5208 * e1000_exit_module - Driver Exit Cleanup Routine
5209 *
5210 * e1000_exit_module is called just before the driver is removed
5211 * from memory.
5212 **/
5213static void __exit e1000_exit_module(void)
5214{
5215 pci_unregister_driver(&e1000_driver);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07005216 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, e1000e_driver_name);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005217}
5218module_exit(e1000_exit_module);
5219
5220
5221MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
5222MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
5223MODULE_LICENSE("GPL");
5224MODULE_VERSION(DRV_VERSION);
5225
5226/* e1000_main.c */