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igb/igbvf: cleanup exception handling in tx_map_adv
[net-next-2.6.git] / drivers / net / e1000e / netdev.c
CommitLineData
bc7f75fa
AK		 1/*******************************************************************************
2
3 Intel PRO/1000 Linux driver
c7e54b1b 4 Copyright(c) 1999 - 2009 Intel Corporation.
bc7f75fa
AK		 5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27*******************************************************************************/
28
29#include <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>
97ac8cae 46#include <linux/pm_qos_params.h>
111b9dc5 47#include <linux/aer.h>
bc7f75fa
AK		 48
49#include "e1000.h"
50
3be8c940 51#define DRV_VERSION "1.0.2-k2"
bc7f75fa
AK		 52char 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,
4662e82b 59 [board_82574] = &e1000_82574_info,
8c81c9c3 60 [board_82583] = &e1000_82583_info,
bc7f75fa
AK		 61 [board_80003es2lan] = &e1000_es2_info,
62 [board_ich8lan] = &e1000_ich8_info,
63 [board_ich9lan] = &e1000_ich9_info,
f4187b56 64 [board_ich10lan] = &e1000_ich10_info,
a4f58f54 65 [board_pchlan] = &e1000_pch_info,
bc7f75fa
AK		 66};
67
bc7f75fa
AK		 68/**
69 * e1000_desc_unused - calculate if we have unused descriptors
70 **/
71static int e1000_desc_unused(struct e1000_ring *ring)
72{
73 if (ring->next_to_clean > ring->next_to_use)
74 return ring->next_to_clean - ring->next_to_use - 1;
75
76 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
77}
78
79/**
ad68076e 80 * e1000_receive_skb - helper function to handle Rx indications
bc7f75fa
AK		 81 * @adapter: board private structure
82 * @status: descriptor status field as written by hardware
83 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
84 * @skb: pointer to sk_buff to be indicated to stack
85 **/
86static void e1000_receive_skb(struct e1000_adapter *adapter,
87 struct net_device *netdev,
88 struct sk_buff *skb,
a39fe742 89 u8 status, __le16 vlan)
bc7f75fa
AK		 90{
91 skb->protocol = eth_type_trans(skb, netdev);
92
93 if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
c405b828
HX		 94 vlan_gro_receive(&adapter->napi, adapter->vlgrp,
95 le16_to_cpu(vlan), skb);
bc7f75fa 96 else
89c88b16 97 napi_gro_receive(&adapter->napi, skb);
bc7f75fa
AK		 98}
99
100/**
101 * e1000_rx_checksum - Receive Checksum Offload for 82543
102 * @adapter: board private structure
103 * @status_err: receive descriptor status and error fields
104 * @csum: receive descriptor csum field
105 * @sk_buff: socket buffer with received data
106 **/
107static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
108 u32 csum, struct sk_buff *skb)
109{
110 u16 status = (u16)status_err;
111 u8 errors = (u8)(status_err >> 24);
112 skb->ip_summed = CHECKSUM_NONE;
113
114 /* Ignore Checksum bit is set */
115 if (status & E1000_RXD_STAT_IXSM)
116 return;
117 /* TCP/UDP checksum error bit is set */
118 if (errors & E1000_RXD_ERR_TCPE) {
119 /* let the stack verify checksum errors */
120 adapter->hw_csum_err++;
121 return;
122 }
123
124 /* TCP/UDP Checksum has not been calculated */
125 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
126 return;
127
128 /* It must be a TCP or UDP packet with a valid checksum */
129 if (status & E1000_RXD_STAT_TCPCS) {
130 /* TCP checksum is good */
131 skb->ip_summed = CHECKSUM_UNNECESSARY;
132 } else {
ad68076e
BA		 133 /*
134 * IP fragment with UDP payload
135 * Hardware complements the payload checksum, so we undo it
bc7f75fa
AK		 136 * and then put the value in host order for further stack use.
137 */
a39fe742
AV		 138 __sum16 sum = (__force __sum16)htons(csum);
139 skb->csum = csum_unfold(~sum);
bc7f75fa
AK		 140 skb->ip_summed = CHECKSUM_COMPLETE;
141 }
142 adapter->hw_csum_good++;
143}
144
145/**
146 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
147 * @adapter: address of board private structure
148 **/
149static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
150 int cleaned_count)
151{
152 struct net_device *netdev = adapter->netdev;
153 struct pci_dev *pdev = adapter->pdev;
154 struct e1000_ring *rx_ring = adapter->rx_ring;
155 struct e1000_rx_desc *rx_desc;
156 struct e1000_buffer *buffer_info;
157 struct sk_buff *skb;
158 unsigned int i;
89d71a66 159 unsigned int bufsz = adapter->rx_buffer_len;
bc7f75fa
AK		 160
161 i = rx_ring->next_to_use;
162 buffer_info = &rx_ring->buffer_info[i];
163
164 while (cleaned_count--) {
165 skb = buffer_info->skb;
166 if (skb) {
167 skb_trim(skb, 0);
168 goto map_skb;
169 }
170
89d71a66 171 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
bc7f75fa
AK		 172 if (!skb) {
173 /* Better luck next round */
174 adapter->alloc_rx_buff_failed++;
175 break;
176 }
177
bc7f75fa
AK		 178 buffer_info->skb = skb;
179map_skb:
180 buffer_info->dma = pci_map_single(pdev, skb->data,
181 adapter->rx_buffer_len,
182 PCI_DMA_FROMDEVICE);
8d8bb39b 183 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
bc7f75fa
AK		 184 dev_err(&pdev->dev, "RX DMA map failed\n");
185 adapter->rx_dma_failed++;
186 break;
187 }
188
189 rx_desc = E1000_RX_DESC(*rx_ring, i);
190 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
191
192 i++;
193 if (i == rx_ring->count)
194 i = 0;
195 buffer_info = &rx_ring->buffer_info[i];
196 }
197
198 if (rx_ring->next_to_use != i) {
199 rx_ring->next_to_use = i;
200 if (i-- == 0)
201 i = (rx_ring->count - 1);
202
ad68076e
BA		 203 /*
204 * Force memory writes to complete before letting h/w
bc7f75fa
AK		 205 * know there are new descriptors to fetch. (Only
206 * applicable for weak-ordered memory model archs,
ad68076e
BA		 207 * such as IA-64).
208 */
bc7f75fa
AK		 209 wmb();
210 writel(i, adapter->hw.hw_addr + rx_ring->tail);
211 }
212}
213
214/**
215 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
216 * @adapter: address of board private structure
217 **/
218static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
219 int cleaned_count)
220{
221 struct net_device *netdev = adapter->netdev;
222 struct pci_dev *pdev = adapter->pdev;
223 union e1000_rx_desc_packet_split *rx_desc;
224 struct e1000_ring *rx_ring = adapter->rx_ring;
225 struct e1000_buffer *buffer_info;
226 struct e1000_ps_page *ps_page;
227 struct sk_buff *skb;
228 unsigned int i, j;
229
230 i = rx_ring->next_to_use;
231 buffer_info = &rx_ring->buffer_info[i];
232
233 while (cleaned_count--) {
234 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
235
236 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
47f44e40
AK		 237 ps_page = &buffer_info->ps_pages[j];
238 if (j >= adapter->rx_ps_pages) {
239 /* all unused desc entries get hw null ptr */
a39fe742 240 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
47f44e40
AK		 241 continue;
242 }
243 if (!ps_page->page) {
244 ps_page->page = alloc_page(GFP_ATOMIC);
bc7f75fa 245 if (!ps_page->page) {
47f44e40
AK		 246 adapter->alloc_rx_buff_failed++;
247 goto no_buffers;
248 }
249 ps_page->dma = pci_map_page(pdev,
250 ps_page->page,
251 0, PAGE_SIZE,
252 PCI_DMA_FROMDEVICE);
8d8bb39b 253 if (pci_dma_mapping_error(pdev, ps_page->dma)) {
47f44e40
AK		 254 dev_err(&adapter->pdev->dev,
255 "RX DMA page map failed\n");
256 adapter->rx_dma_failed++;
257 goto no_buffers;
bc7f75fa 258 }
bc7f75fa 259 }
47f44e40
AK		 260 /*
261 * Refresh the desc even if buffer_addrs
262 * didn't change because each write-back
263 * erases this info.
264 */
265 rx_desc->read.buffer_addr[j+1] =
266 cpu_to_le64(ps_page->dma);
bc7f75fa
AK		 267 }
268
89d71a66
ED		 269 skb = netdev_alloc_skb_ip_align(netdev,
270 adapter->rx_ps_bsize0);
bc7f75fa
AK		 271
272 if (!skb) {
273 adapter->alloc_rx_buff_failed++;
274 break;
275 }
276
bc7f75fa
AK		 277 buffer_info->skb = skb;
278 buffer_info->dma = pci_map_single(pdev, skb->data,
279 adapter->rx_ps_bsize0,
280 PCI_DMA_FROMDEVICE);
8d8bb39b 281 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
bc7f75fa
AK		 282 dev_err(&pdev->dev, "RX DMA map failed\n");
283 adapter->rx_dma_failed++;
284 /* cleanup skb */
285 dev_kfree_skb_any(skb);
286 buffer_info->skb = NULL;
287 break;
288 }
289
290 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
291
292 i++;
293 if (i == rx_ring->count)
294 i = 0;
295 buffer_info = &rx_ring->buffer_info[i];
296 }
297
298no_buffers:
299 if (rx_ring->next_to_use != i) {
300 rx_ring->next_to_use = i;
301
302 if (!(i--))
303 i = (rx_ring->count - 1);
304
ad68076e
BA		 305 /*
306 * Force memory writes to complete before letting h/w
bc7f75fa
AK		 307 * know there are new descriptors to fetch. (Only
308 * applicable for weak-ordered memory model archs,
ad68076e
BA		 309 * such as IA-64).
310 */
bc7f75fa 311 wmb();
ad68076e
BA		 312 /*
313 * Hardware increments by 16 bytes, but packet split
bc7f75fa
AK		 314 * descriptors are 32 bytes...so we increment tail
315 * twice as much.
316 */
317 writel(i<<1, adapter->hw.hw_addr + rx_ring->tail);
318 }
319}
320
97ac8cae
BA		 321/**
322 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
323 * @adapter: address of board private structure
97ac8cae
BA		 324 * @cleaned_count: number of buffers to allocate this pass
325 **/
326
327static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
328 int cleaned_count)
329{
330 struct net_device *netdev = adapter->netdev;
331 struct pci_dev *pdev = adapter->pdev;
332 struct e1000_rx_desc *rx_desc;
333 struct e1000_ring *rx_ring = adapter->rx_ring;
334 struct e1000_buffer *buffer_info;
335 struct sk_buff *skb;
336 unsigned int i;
89d71a66 337 unsigned int bufsz = 256 - 16 /* for skb_reserve */;
97ac8cae
BA		 338
339 i = rx_ring->next_to_use;
340 buffer_info = &rx_ring->buffer_info[i];
341
342 while (cleaned_count--) {
343 skb = buffer_info->skb;
344 if (skb) {
345 skb_trim(skb, 0);
346 goto check_page;
347 }
348
89d71a66 349 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
97ac8cae
BA		 350 if (unlikely(!skb)) {
351 /* Better luck next round */
352 adapter->alloc_rx_buff_failed++;
353 break;
354 }
355
97ac8cae
BA		 356 buffer_info->skb = skb;
357check_page:
358 /* allocate a new page if necessary */
359 if (!buffer_info->page) {
360 buffer_info->page = alloc_page(GFP_ATOMIC);
361 if (unlikely(!buffer_info->page)) {
362 adapter->alloc_rx_buff_failed++;
363 break;
364 }
365 }
366
367 if (!buffer_info->dma)
368 buffer_info->dma = pci_map_page(pdev,
369 buffer_info->page, 0,
370 PAGE_SIZE,
371 PCI_DMA_FROMDEVICE);
372
373 rx_desc = E1000_RX_DESC(*rx_ring, i);
374 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
375
376 if (unlikely(++i == rx_ring->count))
377 i = 0;
378 buffer_info = &rx_ring->buffer_info[i];
379 }
380
381 if (likely(rx_ring->next_to_use != i)) {
382 rx_ring->next_to_use = i;
383 if (unlikely(i-- == 0))
384 i = (rx_ring->count - 1);
385
386 /* Force memory writes to complete before letting h/w
387 * know there are new descriptors to fetch. (Only
388 * applicable for weak-ordered memory model archs,
389 * such as IA-64). */
390 wmb();
391 writel(i, adapter->hw.hw_addr + rx_ring->tail);
392 }
393}
394
bc7f75fa
AK		 395/**
396 * e1000_clean_rx_irq - Send received data up the network stack; legacy
397 * @adapter: board private structure
398 *
399 * the return value indicates whether actual cleaning was done, there
400 * is no guarantee that everything was cleaned
401 **/
402static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
403 int *work_done, int work_to_do)
404{
405 struct net_device *netdev = adapter->netdev;
406 struct pci_dev *pdev = adapter->pdev;
3bb99fe2 407 struct e1000_hw *hw = &adapter->hw;
bc7f75fa
AK		 408 struct e1000_ring *rx_ring = adapter->rx_ring;
409 struct e1000_rx_desc *rx_desc, *next_rxd;
410 struct e1000_buffer *buffer_info, *next_buffer;
411 u32 length;
412 unsigned int i;
413 int cleaned_count = 0;
414 bool cleaned = 0;
415 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
416
417 i = rx_ring->next_to_clean;
418 rx_desc = E1000_RX_DESC(*rx_ring, i);
419 buffer_info = &rx_ring->buffer_info[i];
420
421 while (rx_desc->status & E1000_RXD_STAT_DD) {
422 struct sk_buff *skb;
423 u8 status;
424
425 if (*work_done >= work_to_do)
426 break;
427 (*work_done)++;
428
429 status = rx_desc->status;
430 skb = buffer_info->skb;
431 buffer_info->skb = NULL;
432
433 prefetch(skb->data - NET_IP_ALIGN);
434
435 i++;
436 if (i == rx_ring->count)
437 i = 0;
438 next_rxd = E1000_RX_DESC(*rx_ring, i);
439 prefetch(next_rxd);
440
441 next_buffer = &rx_ring->buffer_info[i];
442
443 cleaned = 1;
444 cleaned_count++;
445 pci_unmap_single(pdev,
446 buffer_info->dma,
447 adapter->rx_buffer_len,
448 PCI_DMA_FROMDEVICE);
449 buffer_info->dma = 0;
450
451 length = le16_to_cpu(rx_desc->length);
452
b94b5028
JB		 453 /*
454 * !EOP means multiple descriptors were used to store a single
455 * packet, if that's the case we need to toss it. In fact, we
456 * need to toss every packet with the EOP bit clear and the
457 * next frame that _does_ have the EOP bit set, as it is by
458 * definition only a frame fragment
459 */
460 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
461 adapter->flags2 |= FLAG2_IS_DISCARDING;
462
463 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
bc7f75fa 464 /* All receives must fit into a single buffer */
3bb99fe2 465 e_dbg("Receive packet consumed multiple buffers\n");
bc7f75fa
AK		 466 /* recycle */
467 buffer_info->skb = skb;
b94b5028
JB		 468 if (status & E1000_RXD_STAT_EOP)
469 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
bc7f75fa
AK		 470 goto next_desc;
471 }
472
473 if (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
474 /* recycle */
475 buffer_info->skb = skb;
476 goto next_desc;
477 }
478
eb7c3adb
JK		 479 /* adjust length to remove Ethernet CRC */
480 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
481 length -= 4;
482
bc7f75fa
AK		 483 total_rx_bytes += length;
484 total_rx_packets++;
485
ad68076e
BA		 486 /*
487 * code added for copybreak, this should improve
bc7f75fa 488 * performance for small packets with large amounts
ad68076e
BA		 489 * of reassembly being done in the stack
490 */
bc7f75fa
AK		 491 if (length < copybreak) {
492 struct sk_buff *new_skb =
89d71a66 493 netdev_alloc_skb_ip_align(netdev, length);
bc7f75fa 494 if (new_skb) {
808ff676
BA		 495 skb_copy_to_linear_data_offset(new_skb,
496 -NET_IP_ALIGN,
497 (skb->data -
498 NET_IP_ALIGN),
499 (length +
500 NET_IP_ALIGN));
bc7f75fa
AK		 501 /* save the skb in buffer_info as good */
502 buffer_info->skb = skb;
503 skb = new_skb;
504 }
505 /* else just continue with the old one */
506 }
507 /* end copybreak code */
508 skb_put(skb, length);
509
510 /* Receive Checksum Offload */
511 e1000_rx_checksum(adapter,
512 (u32)(status) |
513 ((u32)(rx_desc->errors) << 24),
514 le16_to_cpu(rx_desc->csum), skb);
515
516 e1000_receive_skb(adapter, netdev, skb,status,rx_desc->special);
517
518next_desc:
519 rx_desc->status = 0;
520
521 /* return some buffers to hardware, one at a time is too slow */
522 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
523 adapter->alloc_rx_buf(adapter, cleaned_count);
524 cleaned_count = 0;
525 }
526
527 /* use prefetched values */
528 rx_desc = next_rxd;
529 buffer_info = next_buffer;
530 }
531 rx_ring->next_to_clean = i;
532
533 cleaned_count = e1000_desc_unused(rx_ring);
534 if (cleaned_count)
535 adapter->alloc_rx_buf(adapter, cleaned_count);
536
bc7f75fa 537 adapter->total_rx_bytes += total_rx_bytes;
7c25769f 538 adapter->total_rx_packets += total_rx_packets;
7274c20f
AK		 539 netdev->stats.rx_bytes += total_rx_bytes;
540 netdev->stats.rx_packets += total_rx_packets;
bc7f75fa
AK		 541 return cleaned;
542}
543
bc7f75fa
AK		 544static void e1000_put_txbuf(struct e1000_adapter *adapter,
545 struct e1000_buffer *buffer_info)
546{
03b1320d
AD		 547 if (buffer_info->dma) {
548 if (buffer_info->mapped_as_page)
549 pci_unmap_page(adapter->pdev, buffer_info->dma,
550 buffer_info->length, PCI_DMA_TODEVICE);
551 else
552 pci_unmap_single(adapter->pdev, buffer_info->dma,
553 buffer_info->length,
554 PCI_DMA_TODEVICE);
555 buffer_info->dma = 0;
556 }
bc7f75fa
AK		 557 if (buffer_info->skb) {
558 dev_kfree_skb_any(buffer_info->skb);
559 buffer_info->skb = NULL;
560 }
1b7719c4 561 buffer_info->time_stamp = 0;
bc7f75fa
AK		 562}
563
41cec6f1 564static void e1000_print_hw_hang(struct work_struct *work)
bc7f75fa 565{
41cec6f1
BA		 566 struct e1000_adapter *adapter = container_of(work,
567 struct e1000_adapter,
568 print_hang_task);
bc7f75fa
AK		 569 struct e1000_ring *tx_ring = adapter->tx_ring;
570 unsigned int i = tx_ring->next_to_clean;
571 unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
572 struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
41cec6f1
BA		 573 struct e1000_hw *hw = &adapter->hw;
574 u16 phy_status, phy_1000t_status, phy_ext_status;
575 u16 pci_status;
576
577 e1e_rphy(hw, PHY_STATUS, &phy_status);
578 e1e_rphy(hw, PHY_1000T_STATUS, &phy_1000t_status);
579 e1e_rphy(hw, PHY_EXT_STATUS, &phy_ext_status);
bc7f75fa 580
41cec6f1
BA		 581 pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
582
583 /* detected Hardware unit hang */
584 e_err("Detected Hardware Unit Hang:\n"
44defeb3
JK		 585 " TDH <%x>\n"
586 " TDT <%x>\n"
587 " next_to_use <%x>\n"
588 " next_to_clean <%x>\n"
589 "buffer_info[next_to_clean]:\n"
590 " time_stamp <%lx>\n"
591 " next_to_watch <%x>\n"
592 " jiffies <%lx>\n"
41cec6f1
BA		 593 " next_to_watch.status <%x>\n"
594 "MAC Status <%x>\n"
595 "PHY Status <%x>\n"
596 "PHY 1000BASE-T Status <%x>\n"
597 "PHY Extended Status <%x>\n"
598 "PCI Status <%x>\n",
44defeb3
JK		 599 readl(adapter->hw.hw_addr + tx_ring->head),
600 readl(adapter->hw.hw_addr + tx_ring->tail),
601 tx_ring->next_to_use,
602 tx_ring->next_to_clean,
603 tx_ring->buffer_info[eop].time_stamp,
604 eop,
605 jiffies,
41cec6f1
BA		 606 eop_desc->upper.fields.status,
607 er32(STATUS),
608 phy_status,
609 phy_1000t_status,
610 phy_ext_status,
611 pci_status);
bc7f75fa
AK		 612}
613
614/**
615 * e1000_clean_tx_irq - Reclaim resources after transmit completes
616 * @adapter: board private structure
617 *
618 * the return value indicates whether actual cleaning was done, there
619 * is no guarantee that everything was cleaned
620 **/
621static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
622{
623 struct net_device *netdev = adapter->netdev;
624 struct e1000_hw *hw = &adapter->hw;
625 struct e1000_ring *tx_ring = adapter->tx_ring;
626 struct e1000_tx_desc *tx_desc, *eop_desc;
627 struct e1000_buffer *buffer_info;
628 unsigned int i, eop;
629 unsigned int count = 0;
bc7f75fa
AK		 630 unsigned int total_tx_bytes = 0, total_tx_packets = 0;
631
632 i = tx_ring->next_to_clean;
633 eop = tx_ring->buffer_info[i].next_to_watch;
634 eop_desc = E1000_TX_DESC(*tx_ring, eop);
635
12d04a3c
AD		 636 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
637 (count < tx_ring->count)) {
a86043c2
JB		 638 bool cleaned = false;
639 for (; !cleaned; count++) {
bc7f75fa
AK		 640 tx_desc = E1000_TX_DESC(*tx_ring, i);
641 buffer_info = &tx_ring->buffer_info[i];
642 cleaned = (i == eop);
643
644 if (cleaned) {
645 struct sk_buff *skb = buffer_info->skb;
646 unsigned int segs, bytecount;
647 segs = skb_shinfo(skb)->gso_segs ?: 1;
648 /* multiply data chunks by size of headers */
649 bytecount = ((segs - 1) * skb_headlen(skb)) +
650 skb->len;
651 total_tx_packets += segs;
652 total_tx_bytes += bytecount;
653 }
654
655 e1000_put_txbuf(adapter, buffer_info);
656 tx_desc->upper.data = 0;
657
658 i++;
659 if (i == tx_ring->count)
660 i = 0;
661 }
662
663 eop = tx_ring->buffer_info[i].next_to_watch;
664 eop_desc = E1000_TX_DESC(*tx_ring, eop);
bc7f75fa
AK		 665 }
666
667 tx_ring->next_to_clean = i;
668
669#define TX_WAKE_THRESHOLD 32
a86043c2
JB		 670 if (count && netif_carrier_ok(netdev) &&
671 e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
bc7f75fa
AK		 672 /* Make sure that anybody stopping the queue after this
673 * sees the new next_to_clean.
674 */
675 smp_mb();
676
677 if (netif_queue_stopped(netdev) &&
678 !(test_bit(__E1000_DOWN, &adapter->state))) {
679 netif_wake_queue(netdev);
680 ++adapter->restart_queue;
681 }
682 }
683
684 if (adapter->detect_tx_hung) {
41cec6f1
BA		 685 /*
686 * Detect a transmit hang in hardware, this serializes the
687 * check with the clearing of time_stamp and movement of i
688 */
bc7f75fa 689 adapter->detect_tx_hung = 0;
12d04a3c
AD		 690 if (tx_ring->buffer_info[i].time_stamp &&
691 time_after(jiffies, tx_ring->buffer_info[i].time_stamp
8e95a202
JP		 692 + (adapter->tx_timeout_factor * HZ)) &&
693 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
41cec6f1 694 schedule_work(&adapter->print_hang_task);
bc7f75fa
AK		 695 netif_stop_queue(netdev);
696 }
697 }
698 adapter->total_tx_bytes += total_tx_bytes;
699 adapter->total_tx_packets += total_tx_packets;
7274c20f
AK		 700 netdev->stats.tx_bytes += total_tx_bytes;
701 netdev->stats.tx_packets += total_tx_packets;
12d04a3c 702 return (count < tx_ring->count);
bc7f75fa
AK		 703}
704
bc7f75fa
AK		 705/**
706 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
707 * @adapter: board private structure
708 *
709 * the return value indicates whether actual cleaning was done, there
710 * is no guarantee that everything was cleaned
711 **/
712static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
713 int *work_done, int work_to_do)
714{
3bb99fe2 715 struct e1000_hw *hw = &adapter->hw;
bc7f75fa
AK		 716 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
717 struct net_device *netdev = adapter->netdev;
718 struct pci_dev *pdev = adapter->pdev;
719 struct e1000_ring *rx_ring = adapter->rx_ring;
720 struct e1000_buffer *buffer_info, *next_buffer;
721 struct e1000_ps_page *ps_page;
722 struct sk_buff *skb;
723 unsigned int i, j;
724 u32 length, staterr;
725 int cleaned_count = 0;
726 bool cleaned = 0;
727 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
728
729 i = rx_ring->next_to_clean;
730 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
731 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
732 buffer_info = &rx_ring->buffer_info[i];
733
734 while (staterr & E1000_RXD_STAT_DD) {
735 if (*work_done >= work_to_do)
736 break;
737 (*work_done)++;
738 skb = buffer_info->skb;
739
740 /* in the packet split case this is header only */
741 prefetch(skb->data - NET_IP_ALIGN);
742
743 i++;
744 if (i == rx_ring->count)
745 i = 0;
746 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
747 prefetch(next_rxd);
748
749 next_buffer = &rx_ring->buffer_info[i];
750
751 cleaned = 1;
752 cleaned_count++;
753 pci_unmap_single(pdev, buffer_info->dma,
754 adapter->rx_ps_bsize0,
755 PCI_DMA_FROMDEVICE);
756 buffer_info->dma = 0;
757
b94b5028
JB		 758 /* see !EOP comment in other rx routine */
759 if (!(staterr & E1000_RXD_STAT_EOP))
760 adapter->flags2 |= FLAG2_IS_DISCARDING;
761
762 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
3bb99fe2
BA		 763 e_dbg("Packet Split buffers didn't pick up the full "
764 "packet\n");
bc7f75fa 765 dev_kfree_skb_irq(skb);
b94b5028
JB		 766 if (staterr & E1000_RXD_STAT_EOP)
767 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
bc7f75fa
AK		 768 goto next_desc;
769 }
770
771 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
772 dev_kfree_skb_irq(skb);
773 goto next_desc;
774 }
775
776 length = le16_to_cpu(rx_desc->wb.middle.length0);
777
778 if (!length) {
3bb99fe2
BA		 779 e_dbg("Last part of the packet spanning multiple "
780 "descriptors\n");
bc7f75fa
AK		 781 dev_kfree_skb_irq(skb);
782 goto next_desc;
783 }
784
785 /* Good Receive */
786 skb_put(skb, length);
787
788 {
ad68076e
BA		 789 /*
790 * this looks ugly, but it seems compiler issues make it
791 * more efficient than reusing j
792 */
bc7f75fa
AK		 793 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
794
ad68076e
BA		 795 /*
796 * page alloc/put takes too long and effects small packet
797 * throughput, so unsplit small packets and save the alloc/put
798 * only valid in softirq (napi) context to call kmap_*
799 */
bc7f75fa
AK		 800 if (l1 && (l1 <= copybreak) &&
801 ((length + l1) <= adapter->rx_ps_bsize0)) {
802 u8 *vaddr;
803
47f44e40 804 ps_page = &buffer_info->ps_pages[0];
bc7f75fa 805
ad68076e
BA		 806 /*
807 * there is no documentation about how to call
bc7f75fa 808 * kmap_atomic, so we can't hold the mapping
ad68076e
BA		 809 * very long
810 */
bc7f75fa
AK		 811 pci_dma_sync_single_for_cpu(pdev, ps_page->dma,
812 PAGE_SIZE, PCI_DMA_FROMDEVICE);
813 vaddr = kmap_atomic(ps_page->page, KM_SKB_DATA_SOFTIRQ);
814 memcpy(skb_tail_pointer(skb), vaddr, l1);
815 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
816 pci_dma_sync_single_for_device(pdev, ps_page->dma,
817 PAGE_SIZE, PCI_DMA_FROMDEVICE);
140a7480 818
eb7c3adb
JK		 819 /* remove the CRC */
820 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
821 l1 -= 4;
822
bc7f75fa
AK		 823 skb_put(skb, l1);
824 goto copydone;
825 } /* if */
826 }
827
828 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
829 length = le16_to_cpu(rx_desc->wb.upper.length[j]);
830 if (!length)
831 break;
832
47f44e40 833 ps_page = &buffer_info->ps_pages[j];
bc7f75fa
AK		 834 pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
835 PCI_DMA_FROMDEVICE);
836 ps_page->dma = 0;
837 skb_fill_page_desc(skb, j, ps_page->page, 0, length);
838 ps_page->page = NULL;
839 skb->len += length;
840 skb->data_len += length;
841 skb->truesize += length;
842 }
843
eb7c3adb
JK		 844 /* strip the ethernet crc, problem is we're using pages now so
845 * this whole operation can get a little cpu intensive
846 */
847 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
848 pskb_trim(skb, skb->len - 4);
849
bc7f75fa
AK		 850copydone:
851 total_rx_bytes += skb->len;
852 total_rx_packets++;
853
854 e1000_rx_checksum(adapter, staterr, le16_to_cpu(
855 rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
856
857 if (rx_desc->wb.upper.header_status &
858 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
859 adapter->rx_hdr_split++;
860
861 e1000_receive_skb(adapter, netdev, skb,
862 staterr, rx_desc->wb.middle.vlan);
863
864next_desc:
865 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
866 buffer_info->skb = NULL;
867
868 /* return some buffers to hardware, one at a time is too slow */
869 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
870 adapter->alloc_rx_buf(adapter, cleaned_count);
871 cleaned_count = 0;
872 }
873
874 /* use prefetched values */
875 rx_desc = next_rxd;
876 buffer_info = next_buffer;
877
878 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
879 }
880 rx_ring->next_to_clean = i;
881
882 cleaned_count = e1000_desc_unused(rx_ring);
883 if (cleaned_count)
884 adapter->alloc_rx_buf(adapter, cleaned_count);
885
bc7f75fa 886 adapter->total_rx_bytes += total_rx_bytes;
7c25769f 887 adapter->total_rx_packets += total_rx_packets;
7274c20f
AK		 888 netdev->stats.rx_bytes += total_rx_bytes;
889 netdev->stats.rx_packets += total_rx_packets;
bc7f75fa
AK		 890 return cleaned;
891}
892
97ac8cae
BA		 893/**
894 * e1000_consume_page - helper function
895 **/
896static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
897 u16 length)
898{
899 bi->page = NULL;
900 skb->len += length;
901 skb->data_len += length;
902 skb->truesize += length;
903}
904
905/**
906 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
907 * @adapter: board private structure
908 *
909 * the return value indicates whether actual cleaning was done, there
910 * is no guarantee that everything was cleaned
911 **/
912
913static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
914 int *work_done, int work_to_do)
915{
916 struct net_device *netdev = adapter->netdev;
917 struct pci_dev *pdev = adapter->pdev;
918 struct e1000_ring *rx_ring = adapter->rx_ring;
919 struct e1000_rx_desc *rx_desc, *next_rxd;
920 struct e1000_buffer *buffer_info, *next_buffer;
921 u32 length;
922 unsigned int i;
923 int cleaned_count = 0;
924 bool cleaned = false;
925 unsigned int total_rx_bytes=0, total_rx_packets=0;
926
927 i = rx_ring->next_to_clean;
928 rx_desc = E1000_RX_DESC(*rx_ring, i);
929 buffer_info = &rx_ring->buffer_info[i];
930
931 while (rx_desc->status & E1000_RXD_STAT_DD) {
932 struct sk_buff *skb;
933 u8 status;
934
935 if (*work_done >= work_to_do)
936 break;
937 (*work_done)++;
938
939 status = rx_desc->status;
940 skb = buffer_info->skb;
941 buffer_info->skb = NULL;
942
943 ++i;
944 if (i == rx_ring->count)
945 i = 0;
946 next_rxd = E1000_RX_DESC(*rx_ring, i);
947 prefetch(next_rxd);
948
949 next_buffer = &rx_ring->buffer_info[i];
950
951 cleaned = true;
952 cleaned_count++;
953 pci_unmap_page(pdev, buffer_info->dma, PAGE_SIZE,
954 PCI_DMA_FROMDEVICE);
955 buffer_info->dma = 0;
956
957 length = le16_to_cpu(rx_desc->length);
958
959 /* errors is only valid for DD + EOP descriptors */
960 if (unlikely((status & E1000_RXD_STAT_EOP) &&
961 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
962 /* recycle both page and skb */
963 buffer_info->skb = skb;
964 /* an error means any chain goes out the window
965 * too */
966 if (rx_ring->rx_skb_top)
967 dev_kfree_skb(rx_ring->rx_skb_top);
968 rx_ring->rx_skb_top = NULL;
969 goto next_desc;
970 }
971
972#define rxtop rx_ring->rx_skb_top
973 if (!(status & E1000_RXD_STAT_EOP)) {
974 /* this descriptor is only the beginning (or middle) */
975 if (!rxtop) {
976 /* this is the beginning of a chain */
977 rxtop = skb;
978 skb_fill_page_desc(rxtop, 0, buffer_info->page,
979 0, length);
980 } else {
981 /* this is the middle of a chain */
982 skb_fill_page_desc(rxtop,
983 skb_shinfo(rxtop)->nr_frags,
984 buffer_info->page, 0, length);
985 /* re-use the skb, only consumed the page */
986 buffer_info->skb = skb;
987 }
988 e1000_consume_page(buffer_info, rxtop, length);
989 goto next_desc;
990 } else {
991 if (rxtop) {
992 /* end of the chain */
993 skb_fill_page_desc(rxtop,
994 skb_shinfo(rxtop)->nr_frags,
995 buffer_info->page, 0, length);
996 /* re-use the current skb, we only consumed the
997 * page */
998 buffer_info->skb = skb;
999 skb = rxtop;
1000 rxtop = NULL;
1001 e1000_consume_page(buffer_info, skb, length);
1002 } else {
1003 /* no chain, got EOP, this buf is the packet
1004 * copybreak to save the put_page/alloc_page */
1005 if (length <= copybreak &&
1006 skb_tailroom(skb) >= length) {
1007 u8 *vaddr;
1008 vaddr = kmap_atomic(buffer_info->page,
1009 KM_SKB_DATA_SOFTIRQ);
1010 memcpy(skb_tail_pointer(skb), vaddr,
1011 length);
1012 kunmap_atomic(vaddr,
1013 KM_SKB_DATA_SOFTIRQ);
1014 /* re-use the page, so don't erase
1015 * buffer_info->page */
1016 skb_put(skb, length);
1017 } else {
1018 skb_fill_page_desc(skb, 0,
1019 buffer_info->page, 0,
1020 length);
1021 e1000_consume_page(buffer_info, skb,
1022 length);
1023 }
1024 }
1025 }
1026
1027 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1028 e1000_rx_checksum(adapter,
1029 (u32)(status) |
1030 ((u32)(rx_desc->errors) << 24),
1031 le16_to_cpu(rx_desc->csum), skb);
1032
1033 /* probably a little skewed due to removing CRC */
1034 total_rx_bytes += skb->len;
1035 total_rx_packets++;
1036
1037 /* eth type trans needs skb->data to point to something */
1038 if (!pskb_may_pull(skb, ETH_HLEN)) {
44defeb3 1039 e_err("pskb_may_pull failed.\n");
97ac8cae
BA		 1040 dev_kfree_skb(skb);
1041 goto next_desc;
1042 }
1043
1044 e1000_receive_skb(adapter, netdev, skb, status,
1045 rx_desc->special);
1046
1047next_desc:
1048 rx_desc->status = 0;
1049
1050 /* return some buffers to hardware, one at a time is too slow */
1051 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1052 adapter->alloc_rx_buf(adapter, cleaned_count);
1053 cleaned_count = 0;
1054 }
1055
1056 /* use prefetched values */
1057 rx_desc = next_rxd;
1058 buffer_info = next_buffer;
1059 }
1060 rx_ring->next_to_clean = i;
1061
1062 cleaned_count = e1000_desc_unused(rx_ring);
1063 if (cleaned_count)
1064 adapter->alloc_rx_buf(adapter, cleaned_count);
1065
1066 adapter->total_rx_bytes += total_rx_bytes;
1067 adapter->total_rx_packets += total_rx_packets;
7274c20f
AK		 1068 netdev->stats.rx_bytes += total_rx_bytes;
1069 netdev->stats.rx_packets += total_rx_packets;
97ac8cae
BA		 1070 return cleaned;
1071}
1072
bc7f75fa
AK		 1073/**
1074 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1075 * @adapter: board private structure
1076 **/
1077static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
1078{
1079 struct e1000_ring *rx_ring = adapter->rx_ring;
1080 struct e1000_buffer *buffer_info;
1081 struct e1000_ps_page *ps_page;
1082 struct pci_dev *pdev = adapter->pdev;
bc7f75fa
AK		 1083 unsigned int i, j;
1084
1085 /* Free all the Rx ring sk_buffs */
1086 for (i = 0; i < rx_ring->count; i++) {
1087 buffer_info = &rx_ring->buffer_info[i];
1088 if (buffer_info->dma) {
1089 if (adapter->clean_rx == e1000_clean_rx_irq)
1090 pci_unmap_single(pdev, buffer_info->dma,
1091 adapter->rx_buffer_len,
1092 PCI_DMA_FROMDEVICE);
97ac8cae
BA		 1093 else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1094 pci_unmap_page(pdev, buffer_info->dma,
1095 PAGE_SIZE,
1096 PCI_DMA_FROMDEVICE);
bc7f75fa
AK		 1097 else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1098 pci_unmap_single(pdev, buffer_info->dma,
1099 adapter->rx_ps_bsize0,
1100 PCI_DMA_FROMDEVICE);
1101 buffer_info->dma = 0;
1102 }
1103
97ac8cae
BA		 1104 if (buffer_info->page) {
1105 put_page(buffer_info->page);
1106 buffer_info->page = NULL;
1107 }
1108
bc7f75fa
AK		 1109 if (buffer_info->skb) {
1110 dev_kfree_skb(buffer_info->skb);
1111 buffer_info->skb = NULL;
1112 }
1113
1114 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
47f44e40 1115 ps_page = &buffer_info->ps_pages[j];
bc7f75fa
AK		 1116 if (!ps_page->page)
1117 break;
1118 pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
1119 PCI_DMA_FROMDEVICE);
1120 ps_page->dma = 0;
1121 put_page(ps_page->page);
1122 ps_page->page = NULL;
1123 }
1124 }
1125
1126 /* there also may be some cached data from a chained receive */
1127 if (rx_ring->rx_skb_top) {
1128 dev_kfree_skb(rx_ring->rx_skb_top);
1129 rx_ring->rx_skb_top = NULL;
1130 }
1131
bc7f75fa
AK		 1132 /* Zero out the descriptor ring */
1133 memset(rx_ring->desc, 0, rx_ring->size);
1134
1135 rx_ring->next_to_clean = 0;
1136 rx_ring->next_to_use = 0;
b94b5028 1137 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
bc7f75fa
AK		 1138
1139 writel(0, adapter->hw.hw_addr + rx_ring->head);
1140 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1141}
1142
a8f88ff5
JB		 1143static void e1000e_downshift_workaround(struct work_struct *work)
1144{
1145 struct e1000_adapter *adapter = container_of(work,
1146 struct e1000_adapter, downshift_task);
1147
1148 e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1149}
1150
bc7f75fa
AK		 1151/**
1152 * e1000_intr_msi - Interrupt Handler
1153 * @irq: interrupt number
1154 * @data: pointer to a network interface device structure
1155 **/
1156static irqreturn_t e1000_intr_msi(int irq, void *data)
1157{
1158 struct net_device *netdev = data;
1159 struct e1000_adapter *adapter = netdev_priv(netdev);
1160 struct e1000_hw *hw = &adapter->hw;
1161 u32 icr = er32(ICR);
1162
ad68076e
BA		 1163 /*
1164 * read ICR disables interrupts using IAM
1165 */
bc7f75fa 1166
573cca8c 1167 if (icr & E1000_ICR_LSC) {
bc7f75fa 1168 hw->mac.get_link_status = 1;
ad68076e
BA		 1169 /*
1170 * ICH8 workaround-- Call gig speed drop workaround on cable
1171 * disconnect (LSC) before accessing any PHY registers
1172 */
bc7f75fa
AK		 1173 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1174 (!(er32(STATUS) & E1000_STATUS_LU)))
a8f88ff5 1175 schedule_work(&adapter->downshift_task);
bc7f75fa 1176
ad68076e
BA		 1177 /*
1178 * 80003ES2LAN workaround-- For packet buffer work-around on
bc7f75fa 1179 * link down event; disable receives here in the ISR and reset
ad68076e
BA		 1180 * adapter in watchdog
1181 */
bc7f75fa
AK		 1182 if (netif_carrier_ok(netdev) &&
1183 adapter->flags & FLAG_RX_NEEDS_RESTART) {
1184 /* disable receives */
1185 u32 rctl = er32(RCTL);
1186 ew32(RCTL, rctl & ~E1000_RCTL_EN);
318a94d6 1187 adapter->flags |= FLAG_RX_RESTART_NOW;
bc7f75fa
AK		 1188 }
1189 /* guard against interrupt when we're going down */
1190 if (!test_bit(__E1000_DOWN, &adapter->state))
1191 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1192 }
1193
288379f0 1194 if (napi_schedule_prep(&adapter->napi)) {
bc7f75fa
AK		 1195 adapter->total_tx_bytes = 0;
1196 adapter->total_tx_packets = 0;
1197 adapter->total_rx_bytes = 0;
1198 adapter->total_rx_packets = 0;
288379f0 1199 __napi_schedule(&adapter->napi);
bc7f75fa
AK		 1200 }
1201
1202 return IRQ_HANDLED;
1203}
1204
1205/**
1206 * e1000_intr - Interrupt Handler
1207 * @irq: interrupt number
1208 * @data: pointer to a network interface device structure
1209 **/
1210static irqreturn_t e1000_intr(int irq, void *data)
1211{
1212 struct net_device *netdev = data;
1213 struct e1000_adapter *adapter = netdev_priv(netdev);
1214 struct e1000_hw *hw = &adapter->hw;
bc7f75fa 1215 u32 rctl, icr = er32(ICR);
4662e82b 1216
a68ea775 1217 if (!icr || test_bit(__E1000_DOWN, &adapter->state))
bc7f75fa
AK		 1218 return IRQ_NONE; /* Not our interrupt */
1219
ad68076e
BA		 1220 /*
1221 * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1222 * not set, then the adapter didn't send an interrupt
1223 */
bc7f75fa
AK		 1224 if (!(icr & E1000_ICR_INT_ASSERTED))
1225 return IRQ_NONE;
1226
ad68076e
BA		 1227 /*
1228 * Interrupt Auto-Mask...upon reading ICR,
1229 * interrupts are masked. No need for the
1230 * IMC write
1231 */
bc7f75fa 1232
573cca8c 1233 if (icr & E1000_ICR_LSC) {
bc7f75fa 1234 hw->mac.get_link_status = 1;
ad68076e
BA		 1235 /*
1236 * ICH8 workaround-- Call gig speed drop workaround on cable
1237 * disconnect (LSC) before accessing any PHY registers
1238 */
bc7f75fa
AK		 1239 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1240 (!(er32(STATUS) & E1000_STATUS_LU)))
a8f88ff5 1241 schedule_work(&adapter->downshift_task);
bc7f75fa 1242
ad68076e
BA		 1243 /*
1244 * 80003ES2LAN workaround--
bc7f75fa
AK		 1245 * For packet buffer work-around on link down event;
1246 * disable receives here in the ISR and
1247 * reset adapter in watchdog
1248 */
1249 if (netif_carrier_ok(netdev) &&
1250 (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1251 /* disable receives */
1252 rctl = er32(RCTL);
1253 ew32(RCTL, rctl & ~E1000_RCTL_EN);
318a94d6 1254 adapter->flags |= FLAG_RX_RESTART_NOW;
bc7f75fa
AK		 1255 }
1256 /* guard against interrupt when we're going down */
1257 if (!test_bit(__E1000_DOWN, &adapter->state))
1258 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1259 }
1260
288379f0 1261 if (napi_schedule_prep(&adapter->napi)) {
bc7f75fa
AK		 1262 adapter->total_tx_bytes = 0;
1263 adapter->total_tx_packets = 0;
1264 adapter->total_rx_bytes = 0;
1265 adapter->total_rx_packets = 0;
288379f0 1266 __napi_schedule(&adapter->napi);
bc7f75fa
AK		 1267 }
1268
1269 return IRQ_HANDLED;
1270}
1271
4662e82b
BA		 1272static irqreturn_t e1000_msix_other(int irq, void *data)
1273{
1274 struct net_device *netdev = data;
1275 struct e1000_adapter *adapter = netdev_priv(netdev);
1276 struct e1000_hw *hw = &adapter->hw;
1277 u32 icr = er32(ICR);
1278
1279 if (!(icr & E1000_ICR_INT_ASSERTED)) {
a3c69fef
JB		 1280 if (!test_bit(__E1000_DOWN, &adapter->state))
1281 ew32(IMS, E1000_IMS_OTHER);
4662e82b
BA		 1282 return IRQ_NONE;
1283 }
1284
1285 if (icr & adapter->eiac_mask)
1286 ew32(ICS, (icr & adapter->eiac_mask));
1287
1288 if (icr & E1000_ICR_OTHER) {
1289 if (!(icr & E1000_ICR_LSC))
1290 goto no_link_interrupt;
1291 hw->mac.get_link_status = 1;
1292 /* guard against interrupt when we're going down */
1293 if (!test_bit(__E1000_DOWN, &adapter->state))
1294 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1295 }
1296
1297no_link_interrupt:
a3c69fef
JB		 1298 if (!test_bit(__E1000_DOWN, &adapter->state))
1299 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
4662e82b
BA		 1300
1301 return IRQ_HANDLED;
1302}
1303
1304
1305static irqreturn_t e1000_intr_msix_tx(int irq, void *data)
1306{
1307 struct net_device *netdev = data;
1308 struct e1000_adapter *adapter = netdev_priv(netdev);
1309 struct e1000_hw *hw = &adapter->hw;
1310 struct e1000_ring *tx_ring = adapter->tx_ring;
1311
1312
1313 adapter->total_tx_bytes = 0;
1314 adapter->total_tx_packets = 0;
1315
1316 if (!e1000_clean_tx_irq(adapter))
1317 /* Ring was not completely cleaned, so fire another interrupt */
1318 ew32(ICS, tx_ring->ims_val);
1319
1320 return IRQ_HANDLED;
1321}
1322
1323static irqreturn_t e1000_intr_msix_rx(int irq, void *data)
1324{
1325 struct net_device *netdev = data;
1326 struct e1000_adapter *adapter = netdev_priv(netdev);
1327
1328 /* Write the ITR value calculated at the end of the
1329 * previous interrupt.
1330 */
1331 if (adapter->rx_ring->set_itr) {
1332 writel(1000000000 / (adapter->rx_ring->itr_val * 256),
1333 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
1334 adapter->rx_ring->set_itr = 0;
1335 }
1336
288379f0 1337 if (napi_schedule_prep(&adapter->napi)) {
4662e82b
BA		 1338 adapter->total_rx_bytes = 0;
1339 adapter->total_rx_packets = 0;
288379f0 1340 __napi_schedule(&adapter->napi);
4662e82b
BA		 1341 }
1342 return IRQ_HANDLED;
1343}
1344
1345/**
1346 * e1000_configure_msix - Configure MSI-X hardware
1347 *
1348 * e1000_configure_msix sets up the hardware to properly
1349 * generate MSI-X interrupts.
1350 **/
1351static void e1000_configure_msix(struct e1000_adapter *adapter)
1352{
1353 struct e1000_hw *hw = &adapter->hw;
1354 struct e1000_ring *rx_ring = adapter->rx_ring;
1355 struct e1000_ring *tx_ring = adapter->tx_ring;
1356 int vector = 0;
1357 u32 ctrl_ext, ivar = 0;
1358
1359 adapter->eiac_mask = 0;
1360
1361 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1362 if (hw->mac.type == e1000_82574) {
1363 u32 rfctl = er32(RFCTL);
1364 rfctl |= E1000_RFCTL_ACK_DIS;
1365 ew32(RFCTL, rfctl);
1366 }
1367
1368#define E1000_IVAR_INT_ALLOC_VALID 0x8
1369 /* Configure Rx vector */
1370 rx_ring->ims_val = E1000_IMS_RXQ0;
1371 adapter->eiac_mask |= rx_ring->ims_val;
1372 if (rx_ring->itr_val)
1373 writel(1000000000 / (rx_ring->itr_val * 256),
1374 hw->hw_addr + rx_ring->itr_register);
1375 else
1376 writel(1, hw->hw_addr + rx_ring->itr_register);
1377 ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1378
1379 /* Configure Tx vector */
1380 tx_ring->ims_val = E1000_IMS_TXQ0;
1381 vector++;
1382 if (tx_ring->itr_val)
1383 writel(1000000000 / (tx_ring->itr_val * 256),
1384 hw->hw_addr + tx_ring->itr_register);
1385 else
1386 writel(1, hw->hw_addr + tx_ring->itr_register);
1387 adapter->eiac_mask |= tx_ring->ims_val;
1388 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1389
1390 /* set vector for Other Causes, e.g. link changes */
1391 vector++;
1392 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1393 if (rx_ring->itr_val)
1394 writel(1000000000 / (rx_ring->itr_val * 256),
1395 hw->hw_addr + E1000_EITR_82574(vector));
1396 else
1397 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
1398
1399 /* Cause Tx interrupts on every write back */
1400 ivar |= (1 << 31);
1401
1402 ew32(IVAR, ivar);
1403
1404 /* enable MSI-X PBA support */
1405 ctrl_ext = er32(CTRL_EXT);
1406 ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
1407
1408 /* Auto-Mask Other interrupts upon ICR read */
1409#define E1000_EIAC_MASK_82574 0x01F00000
1410 ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
1411 ctrl_ext |= E1000_CTRL_EXT_EIAME;
1412 ew32(CTRL_EXT, ctrl_ext);
1413 e1e_flush();
1414}
1415
1416void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
1417{
1418 if (adapter->msix_entries) {
1419 pci_disable_msix(adapter->pdev);
1420 kfree(adapter->msix_entries);
1421 adapter->msix_entries = NULL;
1422 } else if (adapter->flags & FLAG_MSI_ENABLED) {
1423 pci_disable_msi(adapter->pdev);
1424 adapter->flags &= ~FLAG_MSI_ENABLED;
1425 }
1426
1427 return;
1428}
1429
1430/**
1431 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1432 *
1433 * Attempt to configure interrupts using the best available
1434 * capabilities of the hardware and kernel.
1435 **/
1436void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
1437{
1438 int err;
1439 int numvecs, i;
1440
1441
1442 switch (adapter->int_mode) {
1443 case E1000E_INT_MODE_MSIX:
1444 if (adapter->flags & FLAG_HAS_MSIX) {
1445 numvecs = 3; /* RxQ0, TxQ0 and other */
1446 adapter->msix_entries = kcalloc(numvecs,
1447 sizeof(struct msix_entry),
1448 GFP_KERNEL);
1449 if (adapter->msix_entries) {
1450 for (i = 0; i < numvecs; i++)
1451 adapter->msix_entries[i].entry = i;
1452
1453 err = pci_enable_msix(adapter->pdev,
1454 adapter->msix_entries,
1455 numvecs);
1456 if (err == 0)
1457 return;
1458 }
1459 /* MSI-X failed, so fall through and try MSI */
1460 e_err("Failed to initialize MSI-X interrupts. "
1461 "Falling back to MSI interrupts.\n");
1462 e1000e_reset_interrupt_capability(adapter);
1463 }
1464 adapter->int_mode = E1000E_INT_MODE_MSI;
1465 /* Fall through */
1466 case E1000E_INT_MODE_MSI:
1467 if (!pci_enable_msi(adapter->pdev)) {
1468 adapter->flags |= FLAG_MSI_ENABLED;
1469 } else {
1470 adapter->int_mode = E1000E_INT_MODE_LEGACY;
1471 e_err("Failed to initialize MSI interrupts. Falling "
1472 "back to legacy interrupts.\n");
1473 }
1474 /* Fall through */
1475 case E1000E_INT_MODE_LEGACY:
1476 /* Don't do anything; this is the system default */
1477 break;
1478 }
1479
1480 return;
1481}
1482
1483/**
1484 * e1000_request_msix - Initialize MSI-X interrupts
1485 *
1486 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1487 * kernel.
1488 **/
1489static int e1000_request_msix(struct e1000_adapter *adapter)
1490{
1491 struct net_device *netdev = adapter->netdev;
1492 int err = 0, vector = 0;
1493
1494 if (strlen(netdev->name) < (IFNAMSIZ - 5))
cb7b48f6 1495 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
4662e82b
BA		 1496 else
1497 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1498 err = request_irq(adapter->msix_entries[vector].vector,
a0607fd3 1499 e1000_intr_msix_rx, 0, adapter->rx_ring->name,
4662e82b
BA		 1500 netdev);
1501 if (err)
1502 goto out;
1503 adapter->rx_ring->itr_register = E1000_EITR_82574(vector);
1504 adapter->rx_ring->itr_val = adapter->itr;
1505 vector++;
1506
1507 if (strlen(netdev->name) < (IFNAMSIZ - 5))
cb7b48f6 1508 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
4662e82b
BA		 1509 else
1510 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1511 err = request_irq(adapter->msix_entries[vector].vector,
a0607fd3 1512 e1000_intr_msix_tx, 0, adapter->tx_ring->name,
4662e82b
BA		 1513 netdev);
1514 if (err)
1515 goto out;
1516 adapter->tx_ring->itr_register = E1000_EITR_82574(vector);
1517 adapter->tx_ring->itr_val = adapter->itr;
1518 vector++;
1519
1520 err = request_irq(adapter->msix_entries[vector].vector,
a0607fd3 1521 e1000_msix_other, 0, netdev->name, netdev);
4662e82b
BA		 1522 if (err)
1523 goto out;
1524
1525 e1000_configure_msix(adapter);
1526 return 0;
1527out:
1528 return err;
1529}
1530
f8d59f78
BA		 1531/**
1532 * e1000_request_irq - initialize interrupts
1533 *
1534 * Attempts to configure interrupts using the best available
1535 * capabilities of the hardware and kernel.
1536 **/
bc7f75fa
AK		 1537static int e1000_request_irq(struct e1000_adapter *adapter)
1538{
1539 struct net_device *netdev = adapter->netdev;
bc7f75fa
AK		 1540 int err;
1541
4662e82b
BA		 1542 if (adapter->msix_entries) {
1543 err = e1000_request_msix(adapter);
1544 if (!err)
1545 return err;
1546 /* fall back to MSI */
1547 e1000e_reset_interrupt_capability(adapter);
1548 adapter->int_mode = E1000E_INT_MODE_MSI;
1549 e1000e_set_interrupt_capability(adapter);
bc7f75fa 1550 }
4662e82b 1551 if (adapter->flags & FLAG_MSI_ENABLED) {
a0607fd3 1552 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
4662e82b
BA		 1553 netdev->name, netdev);
1554 if (!err)
1555 return err;
bc7f75fa 1556
4662e82b
BA		 1557 /* fall back to legacy interrupt */
1558 e1000e_reset_interrupt_capability(adapter);
1559 adapter->int_mode = E1000E_INT_MODE_LEGACY;
bc7f75fa
AK		 1560 }
1561
a0607fd3 1562 err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
4662e82b
BA		 1563 netdev->name, netdev);
1564 if (err)
1565 e_err("Unable to allocate interrupt, Error: %d\n", err);
1566
bc7f75fa
AK		 1567 return err;
1568}
1569
1570static void e1000_free_irq(struct e1000_adapter *adapter)
1571{
1572 struct net_device *netdev = adapter->netdev;
1573
4662e82b
BA		 1574 if (adapter->msix_entries) {
1575 int vector = 0;
1576
1577 free_irq(adapter->msix_entries[vector].vector, netdev);
1578 vector++;
1579
1580 free_irq(adapter->msix_entries[vector].vector, netdev);
1581 vector++;
1582
1583 /* Other Causes interrupt vector */
1584 free_irq(adapter->msix_entries[vector].vector, netdev);
1585 return;
bc7f75fa 1586 }
4662e82b
BA		 1587
1588 free_irq(adapter->pdev->irq, netdev);
bc7f75fa
AK		 1589}
1590
1591/**
1592 * e1000_irq_disable - Mask off interrupt generation on the NIC
1593 **/
1594static void e1000_irq_disable(struct e1000_adapter *adapter)
1595{
1596 struct e1000_hw *hw = &adapter->hw;
1597
bc7f75fa 1598 ew32(IMC, ~0);
4662e82b
BA		 1599 if (adapter->msix_entries)
1600 ew32(EIAC_82574, 0);
bc7f75fa
AK		 1601 e1e_flush();
1602 synchronize_irq(adapter->pdev->irq);
1603}
1604
1605/**
1606 * e1000_irq_enable - Enable default interrupt generation settings
1607 **/
1608static void e1000_irq_enable(struct e1000_adapter *adapter)
1609{
1610 struct e1000_hw *hw = &adapter->hw;
1611
4662e82b
BA		 1612 if (adapter->msix_entries) {
1613 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
1614 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
1615 } else {
1616 ew32(IMS, IMS_ENABLE_MASK);
1617 }
74ef9c39 1618 e1e_flush();
bc7f75fa
AK		 1619}
1620
1621/**
1622 * e1000_get_hw_control - get control of the h/w from f/w
1623 * @adapter: address of board private structure
1624 *
489815ce 1625 * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
bc7f75fa
AK		 1626 * For ASF and Pass Through versions of f/w this means that
1627 * the driver is loaded. For AMT version (only with 82573)
1628 * of the f/w this means that the network i/f is open.
1629 **/
1630static void e1000_get_hw_control(struct e1000_adapter *adapter)
1631{
1632 struct e1000_hw *hw = &adapter->hw;
1633 u32 ctrl_ext;
1634 u32 swsm;
1635
1636 /* Let firmware know the driver has taken over */
1637 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1638 swsm = er32(SWSM);
1639 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
1640 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1641 ctrl_ext = er32(CTRL_EXT);
ad68076e 1642 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
bc7f75fa
AK		 1643 }
1644}
1645
1646/**
1647 * e1000_release_hw_control - release control of the h/w to f/w
1648 * @adapter: address of board private structure
1649 *
489815ce 1650 * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
bc7f75fa
AK		 1651 * For ASF and Pass Through versions of f/w this means that the
1652 * driver is no longer loaded. For AMT version (only with 82573) i
1653 * of the f/w this means that the network i/f is closed.
1654 *
1655 **/
1656static void e1000_release_hw_control(struct e1000_adapter *adapter)
1657{
1658 struct e1000_hw *hw = &adapter->hw;
1659 u32 ctrl_ext;
1660 u32 swsm;
1661
1662 /* Let firmware taken over control of h/w */
1663 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1664 swsm = er32(SWSM);
1665 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
1666 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1667 ctrl_ext = er32(CTRL_EXT);
ad68076e 1668 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
bc7f75fa
AK		 1669 }
1670}
1671
bc7f75fa
AK		 1672/**
1673 * @e1000_alloc_ring - allocate memory for a ring structure
1674 **/
1675static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
1676 struct e1000_ring *ring)
1677{
1678 struct pci_dev *pdev = adapter->pdev;
1679
1680 ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
1681 GFP_KERNEL);
1682 if (!ring->desc)
1683 return -ENOMEM;
1684
1685 return 0;
1686}
1687
1688/**
1689 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
1690 * @adapter: board private structure
1691 *
1692 * Return 0 on success, negative on failure
1693 **/
1694int e1000e_setup_tx_resources(struct e1000_adapter *adapter)
1695{
1696 struct e1000_ring *tx_ring = adapter->tx_ring;
1697 int err = -ENOMEM, size;
1698
1699 size = sizeof(struct e1000_buffer) * tx_ring->count;
1700 tx_ring->buffer_info = vmalloc(size);
1701 if (!tx_ring->buffer_info)
1702 goto err;
1703 memset(tx_ring->buffer_info, 0, size);
1704
1705 /* round up to nearest 4K */
1706 tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
1707 tx_ring->size = ALIGN(tx_ring->size, 4096);
1708
1709 err = e1000_alloc_ring_dma(adapter, tx_ring);
1710 if (err)
1711 goto err;
1712
1713 tx_ring->next_to_use = 0;
1714 tx_ring->next_to_clean = 0;
bc7f75fa
AK		 1715
1716 return 0;
1717err:
1718 vfree(tx_ring->buffer_info);
44defeb3 1719 e_err("Unable to allocate memory for the transmit descriptor ring\n");
bc7f75fa
AK		 1720 return err;
1721}
1722
1723/**
1724 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
1725 * @adapter: board private structure
1726 *
1727 * Returns 0 on success, negative on failure
1728 **/
1729int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
1730{
1731 struct e1000_ring *rx_ring = adapter->rx_ring;
47f44e40
AK		 1732 struct e1000_buffer *buffer_info;
1733 int i, size, desc_len, err = -ENOMEM;
bc7f75fa
AK		 1734
1735 size = sizeof(struct e1000_buffer) * rx_ring->count;
1736 rx_ring->buffer_info = vmalloc(size);
1737 if (!rx_ring->buffer_info)
1738 goto err;
1739 memset(rx_ring->buffer_info, 0, size);
1740
47f44e40
AK		 1741 for (i = 0; i < rx_ring->count; i++) {
1742 buffer_info = &rx_ring->buffer_info[i];
1743 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
1744 sizeof(struct e1000_ps_page),
1745 GFP_KERNEL);
1746 if (!buffer_info->ps_pages)
1747 goto err_pages;
1748 }
bc7f75fa
AK		 1749
1750 desc_len = sizeof(union e1000_rx_desc_packet_split);
1751
1752 /* Round up to nearest 4K */
1753 rx_ring->size = rx_ring->count * desc_len;
1754 rx_ring->size = ALIGN(rx_ring->size, 4096);
1755
1756 err = e1000_alloc_ring_dma(adapter, rx_ring);
1757 if (err)
47f44e40 1758 goto err_pages;
bc7f75fa
AK		 1759
1760 rx_ring->next_to_clean = 0;
1761 rx_ring->next_to_use = 0;
1762 rx_ring->rx_skb_top = NULL;
1763
1764 return 0;
47f44e40
AK		 1765
1766err_pages:
1767 for (i = 0; i < rx_ring->count; i++) {
1768 buffer_info = &rx_ring->buffer_info[i];
1769 kfree(buffer_info->ps_pages);
1770 }
bc7f75fa
AK		 1771err:
1772 vfree(rx_ring->buffer_info);
44defeb3 1773 e_err("Unable to allocate memory for the transmit descriptor ring\n");
bc7f75fa
AK		 1774 return err;
1775}
1776
1777/**
1778 * e1000_clean_tx_ring - Free Tx Buffers
1779 * @adapter: board private structure
1780 **/
1781static void e1000_clean_tx_ring(struct e1000_adapter *adapter)
1782{
1783 struct e1000_ring *tx_ring = adapter->tx_ring;
1784 struct e1000_buffer *buffer_info;
1785 unsigned long size;
1786 unsigned int i;
1787
1788 for (i = 0; i < tx_ring->count; i++) {
1789 buffer_info = &tx_ring->buffer_info[i];
1790 e1000_put_txbuf(adapter, buffer_info);
1791 }
1792
1793 size = sizeof(struct e1000_buffer) * tx_ring->count;
1794 memset(tx_ring->buffer_info, 0, size);
1795
1796 memset(tx_ring->desc, 0, tx_ring->size);
1797
1798 tx_ring->next_to_use = 0;
1799 tx_ring->next_to_clean = 0;
1800
1801 writel(0, adapter->hw.hw_addr + tx_ring->head);
1802 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1803}
1804
1805/**
1806 * e1000e_free_tx_resources - Free Tx Resources per Queue
1807 * @adapter: board private structure
1808 *
1809 * Free all transmit software resources
1810 **/
1811void e1000e_free_tx_resources(struct e1000_adapter *adapter)
1812{
1813 struct pci_dev *pdev = adapter->pdev;
1814 struct e1000_ring *tx_ring = adapter->tx_ring;
1815
1816 e1000_clean_tx_ring(adapter);
1817
1818 vfree(tx_ring->buffer_info);
1819 tx_ring->buffer_info = NULL;
1820
1821 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1822 tx_ring->dma);
1823 tx_ring->desc = NULL;
1824}
1825
1826/**
1827 * e1000e_free_rx_resources - Free Rx Resources
1828 * @adapter: board private structure
1829 *
1830 * Free all receive software resources
1831 **/
1832
1833void e1000e_free_rx_resources(struct e1000_adapter *adapter)
1834{
1835 struct pci_dev *pdev = adapter->pdev;
1836 struct e1000_ring *rx_ring = adapter->rx_ring;
47f44e40 1837 int i;
bc7f75fa
AK		 1838
1839 e1000_clean_rx_ring(adapter);
1840
47f44e40
AK		 1841 for (i = 0; i < rx_ring->count; i++) {
1842 kfree(rx_ring->buffer_info[i].ps_pages);
1843 }
1844
bc7f75fa
AK		 1845 vfree(rx_ring->buffer_info);
1846 rx_ring->buffer_info = NULL;
1847
bc7f75fa
AK		 1848 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1849 rx_ring->dma);
1850 rx_ring->desc = NULL;
1851}
1852
1853/**
1854 * e1000_update_itr - update the dynamic ITR value based on statistics
489815ce
AK		 1855 * @adapter: pointer to adapter
1856 * @itr_setting: current adapter->itr
1857 * @packets: the number of packets during this measurement interval
1858 * @bytes: the number of bytes during this measurement interval
1859 *
bc7f75fa
AK		 1860 * Stores a new ITR value based on packets and byte
1861 * counts during the last interrupt. The advantage of per interrupt
1862 * computation is faster updates and more accurate ITR for the current
1863 * traffic pattern. Constants in this function were computed
1864 * based on theoretical maximum wire speed and thresholds were set based
1865 * on testing data as well as attempting to minimize response time
4662e82b
BA		 1866 * while increasing bulk throughput. This functionality is controlled
1867 * by the InterruptThrottleRate module parameter.
bc7f75fa
AK		 1868 **/
1869static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
1870 u16 itr_setting, int packets,
1871 int bytes)
1872{
1873 unsigned int retval = itr_setting;
1874
1875 if (packets == 0)
1876 goto update_itr_done;
1877
1878 switch (itr_setting) {
1879 case lowest_latency:
1880 /* handle TSO and jumbo frames */
1881 if (bytes/packets > 8000)
1882 retval = bulk_latency;
1883 else if ((packets < 5) && (bytes > 512)) {
1884 retval = low_latency;
1885 }
1886 break;
1887 case low_latency: /* 50 usec aka 20000 ints/s */
1888 if (bytes > 10000) {
1889 /* this if handles the TSO accounting */
1890 if (bytes/packets > 8000) {
1891 retval = bulk_latency;
1892 } else if ((packets < 10) || ((bytes/packets) > 1200)) {
1893 retval = bulk_latency;
1894 } else if ((packets > 35)) {
1895 retval = lowest_latency;
1896 }
1897 } else if (bytes/packets > 2000) {
1898 retval = bulk_latency;
1899 } else if (packets <= 2 && bytes < 512) {
1900 retval = lowest_latency;
1901 }
1902 break;
1903 case bulk_latency: /* 250 usec aka 4000 ints/s */
1904 if (bytes > 25000) {
1905 if (packets > 35) {
1906 retval = low_latency;
1907 }
1908 } else if (bytes < 6000) {
1909 retval = low_latency;
1910 }
1911 break;
1912 }
1913
1914update_itr_done:
1915 return retval;
1916}
1917
1918static void e1000_set_itr(struct e1000_adapter *adapter)
1919{
1920 struct e1000_hw *hw = &adapter->hw;
1921 u16 current_itr;
1922 u32 new_itr = adapter->itr;
1923
1924 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
1925 if (adapter->link_speed != SPEED_1000) {
1926 current_itr = 0;
1927 new_itr = 4000;
1928 goto set_itr_now;
1929 }
1930
1931 adapter->tx_itr = e1000_update_itr(adapter,
1932 adapter->tx_itr,
1933 adapter->total_tx_packets,
1934 adapter->total_tx_bytes);
1935 /* conservative mode (itr 3) eliminates the lowest_latency setting */
1936 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
1937 adapter->tx_itr = low_latency;
1938
1939 adapter->rx_itr = e1000_update_itr(adapter,
1940 adapter->rx_itr,
1941 adapter->total_rx_packets,
1942 adapter->total_rx_bytes);
1943 /* conservative mode (itr 3) eliminates the lowest_latency setting */
1944 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
1945 adapter->rx_itr = low_latency;
1946
1947 current_itr = max(adapter->rx_itr, adapter->tx_itr);
1948
1949 switch (current_itr) {
1950 /* counts and packets in update_itr are dependent on these numbers */
1951 case lowest_latency:
1952 new_itr = 70000;
1953 break;
1954 case low_latency:
1955 new_itr = 20000; /* aka hwitr = ~200 */
1956 break;
1957 case bulk_latency:
1958 new_itr = 4000;
1959 break;
1960 default:
1961 break;
1962 }
1963
1964set_itr_now:
1965 if (new_itr != adapter->itr) {
ad68076e
BA		 1966 /*
1967 * this attempts to bias the interrupt rate towards Bulk
bc7f75fa 1968 * by adding intermediate steps when interrupt rate is
ad68076e
BA		 1969 * increasing
1970 */
bc7f75fa
AK		 1971 new_itr = new_itr > adapter->itr ?
1972 min(adapter->itr + (new_itr >> 2), new_itr) :
1973 new_itr;
1974 adapter->itr = new_itr;
4662e82b
BA		 1975 adapter->rx_ring->itr_val = new_itr;
1976 if (adapter->msix_entries)
1977 adapter->rx_ring->set_itr = 1;
1978 else
1979 ew32(ITR, 1000000000 / (new_itr * 256));
bc7f75fa
AK		 1980 }
1981}
1982
4662e82b
BA		 1983/**
1984 * e1000_alloc_queues - Allocate memory for all rings
1985 * @adapter: board private structure to initialize
1986 **/
1987static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1988{
1989 adapter->tx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
1990 if (!adapter->tx_ring)
1991 goto err;
1992
1993 adapter->rx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
1994 if (!adapter->rx_ring)
1995 goto err;
1996
1997 return 0;
1998err:
1999 e_err("Unable to allocate memory for queues\n");
2000 kfree(adapter->rx_ring);
2001 kfree(adapter->tx_ring);
2002 return -ENOMEM;
2003}
2004
bc7f75fa
AK		 2005/**
2006 * e1000_clean - NAPI Rx polling callback
ad68076e 2007 * @napi: struct associated with this polling callback
489815ce 2008 * @budget: amount of packets driver is allowed to process this poll
bc7f75fa
AK		 2009 **/
2010static int e1000_clean(struct napi_struct *napi, int budget)
2011{
2012 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
4662e82b 2013 struct e1000_hw *hw = &adapter->hw;
bc7f75fa 2014 struct net_device *poll_dev = adapter->netdev;
679e8a0f 2015 int tx_cleaned = 1, work_done = 0;
bc7f75fa 2016
4cf1653a 2017 adapter = netdev_priv(poll_dev);
bc7f75fa 2018
4662e82b
BA		 2019 if (adapter->msix_entries &&
2020 !(adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2021 goto clean_rx;
2022
92af3e95 2023 tx_cleaned = e1000_clean_tx_irq(adapter);
bc7f75fa 2024
4662e82b 2025clean_rx:
bc7f75fa 2026 adapter->clean_rx(adapter, &work_done, budget);
d2c7ddd6 2027
12d04a3c 2028 if (!tx_cleaned)
d2c7ddd6 2029 work_done = budget;
bc7f75fa 2030
53e52c72
DM		 2031 /* If budget not fully consumed, exit the polling mode */
2032 if (work_done < budget) {
bc7f75fa
AK		 2033 if (adapter->itr_setting & 3)
2034 e1000_set_itr(adapter);
288379f0 2035 napi_complete(napi);
a3c69fef
JB		 2036 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2037 if (adapter->msix_entries)
2038 ew32(IMS, adapter->rx_ring->ims_val);
2039 else
2040 e1000_irq_enable(adapter);
2041 }
bc7f75fa
AK		 2042 }
2043
2044 return work_done;
2045}
2046
2047static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2048{
2049 struct e1000_adapter *adapter = netdev_priv(netdev);
2050 struct e1000_hw *hw = &adapter->hw;
2051 u32 vfta, index;
2052
2053 /* don't update vlan cookie if already programmed */
2054 if ((adapter->hw.mng_cookie.status &
2055 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2056 (vid == adapter->mng_vlan_id))
2057 return;
caaddaf8 2058
bc7f75fa 2059 /* add VID to filter table */
caaddaf8
BA		 2060 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2061 index = (vid >> 5) & 0x7F;
2062 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2063 vfta |= (1 << (vid & 0x1F));
2064 hw->mac.ops.write_vfta(hw, index, vfta);
2065 }
bc7f75fa
AK		 2066}
2067
2068static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2069{
2070 struct e1000_adapter *adapter = netdev_priv(netdev);
2071 struct e1000_hw *hw = &adapter->hw;
2072 u32 vfta, index;
2073
74ef9c39
JB		 2074 if (!test_bit(__E1000_DOWN, &adapter->state))
2075 e1000_irq_disable(adapter);
bc7f75fa 2076 vlan_group_set_device(adapter->vlgrp, vid, NULL);
74ef9c39
JB		 2077
2078 if (!test_bit(__E1000_DOWN, &adapter->state))
2079 e1000_irq_enable(adapter);
bc7f75fa
AK		 2080
2081 if ((adapter->hw.mng_cookie.status &
2082 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2083 (vid == adapter->mng_vlan_id)) {
2084 /* release control to f/w */
2085 e1000_release_hw_control(adapter);
2086 return;
2087 }
2088
2089 /* remove VID from filter table */
caaddaf8
BA		 2090 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2091 index = (vid >> 5) & 0x7F;
2092 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2093 vfta &= ~(1 << (vid & 0x1F));
2094 hw->mac.ops.write_vfta(hw, index, vfta);
2095 }
bc7f75fa
AK		 2096}
2097
2098static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2099{
2100 struct net_device *netdev = adapter->netdev;
2101 u16 vid = adapter->hw.mng_cookie.vlan_id;
2102 u16 old_vid = adapter->mng_vlan_id;
2103
2104 if (!adapter->vlgrp)
2105 return;
2106
2107 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
2108 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2109 if (adapter->hw.mng_cookie.status &
2110 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2111 e1000_vlan_rx_add_vid(netdev, vid);
2112 adapter->mng_vlan_id = vid;
2113 }
2114
2115 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
2116 (vid != old_vid) &&
2117 !vlan_group_get_device(adapter->vlgrp, old_vid))
2118 e1000_vlan_rx_kill_vid(netdev, old_vid);
2119 } else {
2120 adapter->mng_vlan_id = vid;
2121 }
2122}
2123
2124
2125static void e1000_vlan_rx_register(struct net_device *netdev,
2126 struct vlan_group *grp)
2127{
2128 struct e1000_adapter *adapter = netdev_priv(netdev);
2129 struct e1000_hw *hw = &adapter->hw;
2130 u32 ctrl, rctl;
2131
74ef9c39
JB		 2132 if (!test_bit(__E1000_DOWN, &adapter->state))
2133 e1000_irq_disable(adapter);
bc7f75fa
AK		 2134 adapter->vlgrp = grp;
2135
2136 if (grp) {
2137 /* enable VLAN tag insert/strip */
2138 ctrl = er32(CTRL);
2139 ctrl |= E1000_CTRL_VME;
2140 ew32(CTRL, ctrl);
2141
2142 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2143 /* enable VLAN receive filtering */
2144 rctl = er32(RCTL);
bc7f75fa
AK		 2145 rctl &= ~E1000_RCTL_CFIEN;
2146 ew32(RCTL, rctl);
2147 e1000_update_mng_vlan(adapter);
2148 }
2149 } else {
2150 /* disable VLAN tag insert/strip */
2151 ctrl = er32(CTRL);
2152 ctrl &= ~E1000_CTRL_VME;
2153 ew32(CTRL, ctrl);
2154
2155 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
bc7f75fa
AK		 2156 if (adapter->mng_vlan_id !=
2157 (u16)E1000_MNG_VLAN_NONE) {
2158 e1000_vlan_rx_kill_vid(netdev,
2159 adapter->mng_vlan_id);
2160 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2161 }
2162 }
2163 }
2164
74ef9c39
JB		 2165 if (!test_bit(__E1000_DOWN, &adapter->state))
2166 e1000_irq_enable(adapter);
bc7f75fa
AK		 2167}
2168
2169static void e1000_restore_vlan(struct e1000_adapter *adapter)
2170{
2171 u16 vid;
2172
2173 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2174
2175 if (!adapter->vlgrp)
2176 return;
2177
2178 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2179 if (!vlan_group_get_device(adapter->vlgrp, vid))
2180 continue;
2181 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2182 }
2183}
2184
2185static void e1000_init_manageability(struct e1000_adapter *adapter)
2186{
2187 struct e1000_hw *hw = &adapter->hw;
2188 u32 manc, manc2h;
2189
2190 if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2191 return;
2192
2193 manc = er32(MANC);
2194
ad68076e
BA		 2195 /*
2196 * enable receiving management packets to the host. this will probably
bc7f75fa 2197 * generate destination unreachable messages from the host OS, but
ad68076e
BA		 2198 * the packets will be handled on SMBUS
2199 */
bc7f75fa
AK		 2200 manc |= E1000_MANC_EN_MNG2HOST;
2201 manc2h = er32(MANC2H);
2202#define E1000_MNG2HOST_PORT_623 (1 << 5)
2203#define E1000_MNG2HOST_PORT_664 (1 << 6)
2204 manc2h |= E1000_MNG2HOST_PORT_623;
2205 manc2h |= E1000_MNG2HOST_PORT_664;
2206 ew32(MANC2H, manc2h);
2207 ew32(MANC, manc);
2208}
2209
2210/**
2211 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
2212 * @adapter: board private structure
2213 *
2214 * Configure the Tx unit of the MAC after a reset.
2215 **/
2216static void e1000_configure_tx(struct e1000_adapter *adapter)
2217{
2218 struct e1000_hw *hw = &adapter->hw;
2219 struct e1000_ring *tx_ring = adapter->tx_ring;
2220 u64 tdba;
2221 u32 tdlen, tctl, tipg, tarc;
2222 u32 ipgr1, ipgr2;
2223
2224 /* Setup the HW Tx Head and Tail descriptor pointers */
2225 tdba = tx_ring->dma;
2226 tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
284901a9 2227 ew32(TDBAL, (tdba & DMA_BIT_MASK(32)));
bc7f75fa
AK		 2228 ew32(TDBAH, (tdba >> 32));
2229 ew32(TDLEN, tdlen);
2230 ew32(TDH, 0);
2231 ew32(TDT, 0);
2232 tx_ring->head = E1000_TDH;
2233 tx_ring->tail = E1000_TDT;
2234
2235 /* Set the default values for the Tx Inter Packet Gap timer */
2236 tipg = DEFAULT_82543_TIPG_IPGT_COPPER; /* 8 */
2237 ipgr1 = DEFAULT_82543_TIPG_IPGR1; /* 8 */
2238 ipgr2 = DEFAULT_82543_TIPG_IPGR2; /* 6 */
2239
2240 if (adapter->flags & FLAG_TIPG_MEDIUM_FOR_80003ESLAN)
2241 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; /* 7 */
2242
2243 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
2244 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
2245 ew32(TIPG, tipg);
2246
2247 /* Set the Tx Interrupt Delay register */
2248 ew32(TIDV, adapter->tx_int_delay);
ad68076e 2249 /* Tx irq moderation */
bc7f75fa
AK		 2250 ew32(TADV, adapter->tx_abs_int_delay);
2251
2252 /* Program the Transmit Control Register */
2253 tctl = er32(TCTL);
2254 tctl &= ~E1000_TCTL_CT;
2255 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2256 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2257
2258 if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
e9ec2c0f 2259 tarc = er32(TARC(0));
ad68076e
BA		 2260 /*
2261 * set the speed mode bit, we'll clear it if we're not at
2262 * gigabit link later
2263 */
bc7f75fa
AK		 2264#define SPEED_MODE_BIT (1 << 21)
2265 tarc |= SPEED_MODE_BIT;
e9ec2c0f 2266 ew32(TARC(0), tarc);
bc7f75fa
AK		 2267 }
2268
2269 /* errata: program both queues to unweighted RR */
2270 if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
e9ec2c0f 2271 tarc = er32(TARC(0));
bc7f75fa 2272 tarc |= 1;
e9ec2c0f
JK		 2273 ew32(TARC(0), tarc);
2274 tarc = er32(TARC(1));
bc7f75fa 2275 tarc |= 1;
e9ec2c0f 2276 ew32(TARC(1), tarc);
bc7f75fa
AK		 2277 }
2278
bc7f75fa
AK		 2279 /* Setup Transmit Descriptor Settings for eop descriptor */
2280 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2281
2282 /* only set IDE if we are delaying interrupts using the timers */
2283 if (adapter->tx_int_delay)
2284 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2285
2286 /* enable Report Status bit */
2287 adapter->txd_cmd |= E1000_TXD_CMD_RS;
2288
2289 ew32(TCTL, tctl);
2290
edfea6e6
SH		 2291 e1000e_config_collision_dist(hw);
2292
bc7f75fa
AK		 2293 adapter->tx_queue_len = adapter->netdev->tx_queue_len;
2294}
2295
2296/**
2297 * e1000_setup_rctl - configure the receive control registers
2298 * @adapter: Board private structure
2299 **/
2300#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2301 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2302static void e1000_setup_rctl(struct e1000_adapter *adapter)
2303{
2304 struct e1000_hw *hw = &adapter->hw;
2305 u32 rctl, rfctl;
2306 u32 psrctl = 0;
2307 u32 pages = 0;
2308
2309 /* Program MC offset vector base */
2310 rctl = er32(RCTL);
2311 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2312 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
2313 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
2314 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2315
2316 /* Do not Store bad packets */
2317 rctl &= ~E1000_RCTL_SBP;
2318
2319 /* Enable Long Packet receive */
2320 if (adapter->netdev->mtu <= ETH_DATA_LEN)
2321 rctl &= ~E1000_RCTL_LPE;
2322 else
2323 rctl |= E1000_RCTL_LPE;
2324
eb7c3adb
JK		 2325 /* Some systems expect that the CRC is included in SMBUS traffic. The
2326 * hardware strips the CRC before sending to both SMBUS (BMC) and to
2327 * host memory when this is enabled
2328 */
2329 if (adapter->flags2 & FLAG2_CRC_STRIPPING)
2330 rctl |= E1000_RCTL_SECRC;
5918bd88 2331
a4f58f54
BA		 2332 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2333 if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
2334 u16 phy_data;
2335
2336 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
2337 phy_data &= 0xfff8;
2338 phy_data |= (1 << 2);
2339 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
2340
2341 e1e_rphy(hw, 22, &phy_data);
2342 phy_data &= 0x0fff;
2343 phy_data |= (1 << 14);
2344 e1e_wphy(hw, 0x10, 0x2823);
2345 e1e_wphy(hw, 0x11, 0x0003);
2346 e1e_wphy(hw, 22, phy_data);
2347 }
2348
bc7f75fa
AK		 2349 /* Setup buffer sizes */
2350 rctl &= ~E1000_RCTL_SZ_4096;
2351 rctl |= E1000_RCTL_BSEX;
2352 switch (adapter->rx_buffer_len) {
bc7f75fa
AK		 2353 case 2048:
2354 default:
2355 rctl |= E1000_RCTL_SZ_2048;
2356 rctl &= ~E1000_RCTL_BSEX;
2357 break;
2358 case 4096:
2359 rctl |= E1000_RCTL_SZ_4096;
2360 break;
2361 case 8192:
2362 rctl |= E1000_RCTL_SZ_8192;
2363 break;
2364 case 16384:
2365 rctl |= E1000_RCTL_SZ_16384;
2366 break;
2367 }
2368
2369 /*
2370 * 82571 and greater support packet-split where the protocol
2371 * header is placed in skb->data and the packet data is
2372 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2373 * In the case of a non-split, skb->data is linearly filled,
2374 * followed by the page buffers. Therefore, skb->data is
2375 * sized to hold the largest protocol header.
2376 *
2377 * allocations using alloc_page take too long for regular MTU
2378 * so only enable packet split for jumbo frames
2379 *
2380 * Using pages when the page size is greater than 16k wastes
2381 * a lot of memory, since we allocate 3 pages at all times
2382 * per packet.
2383 */
bc7f75fa 2384 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
97ac8cae
BA		 2385 if (!(adapter->flags & FLAG_IS_ICH) && (pages <= 3) &&
2386 (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
bc7f75fa 2387 adapter->rx_ps_pages = pages;
97ac8cae
BA		 2388 else
2389 adapter->rx_ps_pages = 0;
bc7f75fa
AK		 2390
2391 if (adapter->rx_ps_pages) {
2392 /* Configure extra packet-split registers */
2393 rfctl = er32(RFCTL);
2394 rfctl |= E1000_RFCTL_EXTEN;
ad68076e
BA		 2395 /*
2396 * disable packet split support for IPv6 extension headers,
2397 * because some malformed IPv6 headers can hang the Rx
2398 */
bc7f75fa
AK		 2399 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2400 E1000_RFCTL_NEW_IPV6_EXT_DIS);
2401
2402 ew32(RFCTL, rfctl);
2403
140a7480
AK		 2404 /* Enable Packet split descriptors */
2405 rctl |= E1000_RCTL_DTYP_PS;
bc7f75fa
AK		 2406
2407 psrctl |= adapter->rx_ps_bsize0 >>
2408 E1000_PSRCTL_BSIZE0_SHIFT;
2409
2410 switch (adapter->rx_ps_pages) {
2411 case 3:
2412 psrctl |= PAGE_SIZE <<
2413 E1000_PSRCTL_BSIZE3_SHIFT;
2414 case 2:
2415 psrctl |= PAGE_SIZE <<
2416 E1000_PSRCTL_BSIZE2_SHIFT;
2417 case 1:
2418 psrctl |= PAGE_SIZE >>
2419 E1000_PSRCTL_BSIZE1_SHIFT;
2420 break;
2421 }
2422
2423 ew32(PSRCTL, psrctl);
2424 }
2425
2426 ew32(RCTL, rctl);
318a94d6
JK		 2427 /* just started the receive unit, no need to restart */
2428 adapter->flags &= ~FLAG_RX_RESTART_NOW;
bc7f75fa
AK		 2429}
2430
2431/**
2432 * e1000_configure_rx - Configure Receive Unit after Reset
2433 * @adapter: board private structure
2434 *
2435 * Configure the Rx unit of the MAC after a reset.
2436 **/
2437static void e1000_configure_rx(struct e1000_adapter *adapter)
2438{
2439 struct e1000_hw *hw = &adapter->hw;
2440 struct e1000_ring *rx_ring = adapter->rx_ring;
2441 u64 rdba;
2442 u32 rdlen, rctl, rxcsum, ctrl_ext;
2443
2444 if (adapter->rx_ps_pages) {
2445 /* this is a 32 byte descriptor */
2446 rdlen = rx_ring->count *
2447 sizeof(union e1000_rx_desc_packet_split);
2448 adapter->clean_rx = e1000_clean_rx_irq_ps;
2449 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
97ac8cae
BA		 2450 } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
2451 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2452 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
2453 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
bc7f75fa 2454 } else {
97ac8cae 2455 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
bc7f75fa
AK		 2456 adapter->clean_rx = e1000_clean_rx_irq;
2457 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2458 }
2459
2460 /* disable receives while setting up the descriptors */
2461 rctl = er32(RCTL);
2462 ew32(RCTL, rctl & ~E1000_RCTL_EN);
2463 e1e_flush();
2464 msleep(10);
2465
2466 /* set the Receive Delay Timer Register */
2467 ew32(RDTR, adapter->rx_int_delay);
2468
2469 /* irq moderation */
2470 ew32(RADV, adapter->rx_abs_int_delay);
2471 if (adapter->itr_setting != 0)
ad68076e 2472 ew32(ITR, 1000000000 / (adapter->itr * 256));
bc7f75fa
AK		 2473
2474 ctrl_ext = er32(CTRL_EXT);
bc7f75fa
AK		 2475 /* Auto-Mask interrupts upon ICR access */
2476 ctrl_ext |= E1000_CTRL_EXT_IAME;
2477 ew32(IAM, 0xffffffff);
2478 ew32(CTRL_EXT, ctrl_ext);
2479 e1e_flush();
2480
ad68076e
BA		 2481 /*
2482 * Setup the HW Rx Head and Tail Descriptor Pointers and
2483 * the Base and Length of the Rx Descriptor Ring
2484 */
bc7f75fa 2485 rdba = rx_ring->dma;
284901a9 2486 ew32(RDBAL, (rdba & DMA_BIT_MASK(32)));
bc7f75fa
AK		 2487 ew32(RDBAH, (rdba >> 32));
2488 ew32(RDLEN, rdlen);
2489 ew32(RDH, 0);
2490 ew32(RDT, 0);
2491 rx_ring->head = E1000_RDH;
2492 rx_ring->tail = E1000_RDT;
2493
2494 /* Enable Receive Checksum Offload for TCP and UDP */
2495 rxcsum = er32(RXCSUM);
2496 if (adapter->flags & FLAG_RX_CSUM_ENABLED) {
2497 rxcsum |= E1000_RXCSUM_TUOFL;
2498
ad68076e
BA		 2499 /*
2500 * IPv4 payload checksum for UDP fragments must be
2501 * used in conjunction with packet-split.
2502 */
bc7f75fa
AK		 2503 if (adapter->rx_ps_pages)
2504 rxcsum |= E1000_RXCSUM_IPPCSE;
2505 } else {
2506 rxcsum &= ~E1000_RXCSUM_TUOFL;
2507 /* no need to clear IPPCSE as it defaults to 0 */
2508 }
2509 ew32(RXCSUM, rxcsum);
2510
ad68076e
BA		 2511 /*
2512 * Enable early receives on supported devices, only takes effect when
bc7f75fa 2513 * packet size is equal or larger than the specified value (in 8 byte
ad68076e
BA		 2514 * units), e.g. using jumbo frames when setting to E1000_ERT_2048
2515 */
53ec5498
BA		 2516 if (adapter->flags & FLAG_HAS_ERT) {
2517 if (adapter->netdev->mtu > ETH_DATA_LEN) {
2518 u32 rxdctl = er32(RXDCTL(0));
2519 ew32(RXDCTL(0), rxdctl | 0x3);
2520 ew32(ERT, E1000_ERT_2048 | (1 << 13));
2521 /*
2522 * With jumbo frames and early-receive enabled,
2523 * excessive C-state transition latencies result in
2524 * dropped transactions.
2525 */
2526 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2527 adapter->netdev->name, 55);
2528 } else {
2529 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2530 adapter->netdev->name,
2531 PM_QOS_DEFAULT_VALUE);
2532 }
97ac8cae 2533 }
bc7f75fa
AK		 2534
2535 /* Enable Receives */
2536 ew32(RCTL, rctl);
2537}
2538
2539/**
e2de3eb6 2540 * e1000_update_mc_addr_list - Update Multicast addresses
bc7f75fa
AK		 2541 * @hw: pointer to the HW structure
2542 * @mc_addr_list: array of multicast addresses to program
2543 * @mc_addr_count: number of multicast addresses to program
2544 * @rar_used_count: the first RAR register free to program
2545 * @rar_count: total number of supported Receive Address Registers
2546 *
2547 * Updates the Receive Address Registers and Multicast Table Array.
2548 * The caller must have a packed mc_addr_list of multicast addresses.
2549 * The parameter rar_count will usually be hw->mac.rar_entry_count
2550 * unless there are workarounds that change this. Currently no func pointer
2551 * exists and all implementations are handled in the generic version of this
2552 * function.
2553 **/
e2de3eb6
JK		 2554static void e1000_update_mc_addr_list(struct e1000_hw *hw, u8 *mc_addr_list,
2555 u32 mc_addr_count, u32 rar_used_count,
2556 u32 rar_count)
bc7f75fa 2557{
e2de3eb6 2558 hw->mac.ops.update_mc_addr_list(hw, mc_addr_list, mc_addr_count,
bc7f75fa
AK		 2559 rar_used_count, rar_count);
2560}
2561
2562/**
2563 * e1000_set_multi - Multicast and Promiscuous mode set
2564 * @netdev: network interface device structure
2565 *
2566 * The set_multi entry point is called whenever the multicast address
2567 * list or the network interface flags are updated. This routine is
2568 * responsible for configuring the hardware for proper multicast,
2569 * promiscuous mode, and all-multi behavior.
2570 **/
2571static void e1000_set_multi(struct net_device *netdev)
2572{
2573 struct e1000_adapter *adapter = netdev_priv(netdev);
2574 struct e1000_hw *hw = &adapter->hw;
2575 struct e1000_mac_info *mac = &hw->mac;
2576 struct dev_mc_list *mc_ptr;
2577 u8 *mta_list;
2578 u32 rctl;
2579 int i;
2580
2581 /* Check for Promiscuous and All Multicast modes */
2582
2583 rctl = er32(RCTL);
2584
2585 if (netdev->flags & IFF_PROMISC) {
2586 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
746b9f02 2587 rctl &= ~E1000_RCTL_VFE;
bc7f75fa 2588 } else {
746b9f02
PM		 2589 if (netdev->flags & IFF_ALLMULTI) {
2590 rctl |= E1000_RCTL_MPE;
2591 rctl &= ~E1000_RCTL_UPE;
2592 } else {
2593 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2594 }
78ed11a5 2595 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
746b9f02 2596 rctl |= E1000_RCTL_VFE;
bc7f75fa
AK		 2597 }
2598
2599 ew32(RCTL, rctl);
2600
2601 if (netdev->mc_count) {
2602 mta_list = kmalloc(netdev->mc_count * 6, GFP_ATOMIC);
2603 if (!mta_list)
2604 return;
2605
2606 /* prepare a packed array of only addresses. */
2607 mc_ptr = netdev->mc_list;
2608
2609 for (i = 0; i < netdev->mc_count; i++) {
2610 if (!mc_ptr)
2611 break;
2612 memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr,
2613 ETH_ALEN);
2614 mc_ptr = mc_ptr->next;
2615 }
2616
e2de3eb6 2617 e1000_update_mc_addr_list(hw, mta_list, i, 1,
bc7f75fa
AK		 2618 mac->rar_entry_count);
2619 kfree(mta_list);
2620 } else {
2621 /*
2622 * if we're called from probe, we might not have
2623 * anything to do here, so clear out the list
2624 */
e2de3eb6 2625 e1000_update_mc_addr_list(hw, NULL, 0, 1, mac->rar_entry_count);
bc7f75fa
AK		 2626 }
2627}
2628
2629/**
ad68076e 2630 * e1000_configure - configure the hardware for Rx and Tx
bc7f75fa
AK		 2631 * @adapter: private board structure
2632 **/
2633static void e1000_configure(struct e1000_adapter *adapter)
2634{
2635 e1000_set_multi(adapter->netdev);
2636
2637 e1000_restore_vlan(adapter);
2638 e1000_init_manageability(adapter);
2639
2640 e1000_configure_tx(adapter);
2641 e1000_setup_rctl(adapter);
2642 e1000_configure_rx(adapter);
ad68076e 2643 adapter->alloc_rx_buf(adapter, e1000_desc_unused(adapter->rx_ring));
bc7f75fa
AK		 2644}
2645
2646/**
2647 * e1000e_power_up_phy - restore link in case the phy was powered down
2648 * @adapter: address of board private structure
2649 *
2650 * The phy may be powered down to save power and turn off link when the
2651 * driver is unloaded and wake on lan is not enabled (among others)
2652 * *** this routine MUST be followed by a call to e1000e_reset ***
2653 **/
2654void e1000e_power_up_phy(struct e1000_adapter *adapter)
2655{
17f208de
BA		 2656 if (adapter->hw.phy.ops.power_up)
2657 adapter->hw.phy.ops.power_up(&adapter->hw);
bc7f75fa
AK		 2658
2659 adapter->hw.mac.ops.setup_link(&adapter->hw);
2660}
2661
2662/**
2663 * e1000_power_down_phy - Power down the PHY
2664 *
17f208de
BA		 2665 * Power down the PHY so no link is implied when interface is down.
2666 * The PHY cannot be powered down if management or WoL is active.
bc7f75fa
AK		 2667 */
2668static void e1000_power_down_phy(struct e1000_adapter *adapter)
2669{
bc7f75fa 2670 /* WoL is enabled */
23b66e2b 2671 if (adapter->wol)
bc7f75fa
AK		 2672 return;
2673
17f208de
BA		 2674 if (adapter->hw.phy.ops.power_down)
2675 adapter->hw.phy.ops.power_down(&adapter->hw);
bc7f75fa
AK		 2676}
2677
2678/**
2679 * e1000e_reset - bring the hardware into a known good state
2680 *
2681 * This function boots the hardware and enables some settings that
2682 * require a configuration cycle of the hardware - those cannot be
2683 * set/changed during runtime. After reset the device needs to be
ad68076e 2684 * properly configured for Rx, Tx etc.
bc7f75fa
AK		 2685 */
2686void e1000e_reset(struct e1000_adapter *adapter)
2687{
2688 struct e1000_mac_info *mac = &adapter->hw.mac;
318a94d6 2689 struct e1000_fc_info *fc = &adapter->hw.fc;
bc7f75fa
AK		 2690 struct e1000_hw *hw = &adapter->hw;
2691 u32 tx_space, min_tx_space, min_rx_space;
318a94d6 2692 u32 pba = adapter->pba;
bc7f75fa
AK		 2693 u16 hwm;
2694
ad68076e 2695 /* reset Packet Buffer Allocation to default */
318a94d6 2696 ew32(PBA, pba);
df762464 2697
318a94d6 2698 if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
ad68076e
BA		 2699 /*
2700 * To maintain wire speed transmits, the Tx FIFO should be
bc7f75fa
AK		 2701 * large enough to accommodate two full transmit packets,
2702 * rounded up to the next 1KB and expressed in KB. Likewise,
2703 * the Rx FIFO should be large enough to accommodate at least
2704 * one full receive packet and is similarly rounded up and
ad68076e
BA		 2705 * expressed in KB.
2706 */
df762464 2707 pba = er32(PBA);
bc7f75fa 2708 /* upper 16 bits has Tx packet buffer allocation size in KB */
df762464 2709 tx_space = pba >> 16;
bc7f75fa 2710 /* lower 16 bits has Rx packet buffer allocation size in KB */
df762464 2711 pba &= 0xffff;
ad68076e
BA		 2712 /*
2713 * the Tx fifo also stores 16 bytes of information about the tx
2714 * but don't include ethernet FCS because hardware appends it
318a94d6
JK		 2715 */
2716 min_tx_space = (adapter->max_frame_size +
bc7f75fa
AK		 2717 sizeof(struct e1000_tx_desc) -
2718 ETH_FCS_LEN) * 2;
2719 min_tx_space = ALIGN(min_tx_space, 1024);
2720 min_tx_space >>= 10;
2721 /* software strips receive CRC, so leave room for it */
318a94d6 2722 min_rx_space = adapter->max_frame_size;
bc7f75fa
AK		 2723 min_rx_space = ALIGN(min_rx_space, 1024);
2724 min_rx_space >>= 10;
2725
ad68076e
BA		 2726 /*
2727 * If current Tx allocation is less than the min Tx FIFO size,
bc7f75fa 2728 * and the min Tx FIFO size is less than the current Rx FIFO
ad68076e
BA		 2729 * allocation, take space away from current Rx allocation
2730 */
df762464
AK		 2731 if ((tx_space < min_tx_space) &&
2732 ((min_tx_space - tx_space) < pba)) {
2733 pba -= min_tx_space - tx_space;
bc7f75fa 2734
ad68076e
BA		 2735 /*
2736 * if short on Rx space, Rx wins and must trump tx
2737 * adjustment or use Early Receive if available
2738 */
df762464 2739 if ((pba < min_rx_space) &&
bc7f75fa
AK		 2740 (!(adapter->flags & FLAG_HAS_ERT)))
2741 /* ERT enabled in e1000_configure_rx */
df762464 2742 pba = min_rx_space;
bc7f75fa 2743 }
df762464
AK		 2744
2745 ew32(PBA, pba);
bc7f75fa
AK		 2746 }
2747
bc7f75fa 2748
ad68076e
BA		 2749 /*
2750 * flow control settings
2751 *
38eb394e 2752 * The high water mark must be low enough to fit one full frame
bc7f75fa
AK		 2753 * (or the size used for early receive) above it in the Rx FIFO.
2754 * Set it to the lower of:
2755 * - 90% of the Rx FIFO size, and
2756 * - the full Rx FIFO size minus the early receive size (for parts
2757 * with ERT support assuming ERT set to E1000_ERT_2048), or
38eb394e 2758 * - the full Rx FIFO size minus one full frame
ad68076e 2759 */
38eb394e
BA		 2760 if (hw->mac.type == e1000_pchlan) {
2761 /*
2762 * Workaround PCH LOM adapter hangs with certain network
2763 * loads. If hangs persist, try disabling Tx flow control.
2764 */
2765 if (adapter->netdev->mtu > ETH_DATA_LEN) {
2766 fc->high_water = 0x3500;
2767 fc->low_water = 0x1500;
2768 } else {
2769 fc->high_water = 0x5000;
2770 fc->low_water = 0x3000;
2771 }
2772 } else {
2773 if ((adapter->flags & FLAG_HAS_ERT) &&
2774 (adapter->netdev->mtu > ETH_DATA_LEN))
2775 hwm = min(((pba << 10) * 9 / 10),
2776 ((pba << 10) - (E1000_ERT_2048 << 3)));
2777 else
2778 hwm = min(((pba << 10) * 9 / 10),
2779 ((pba << 10) - adapter->max_frame_size));
bc7f75fa 2780
38eb394e
BA		 2781 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
2782 fc->low_water = fc->high_water - 8;
2783 }
bc7f75fa
AK		 2784
2785 if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
318a94d6 2786 fc->pause_time = 0xFFFF;
bc7f75fa 2787 else
318a94d6
JK		 2788 fc->pause_time = E1000_FC_PAUSE_TIME;
2789 fc->send_xon = 1;
5c48ef3e 2790 fc->current_mode = fc->requested_mode;
bc7f75fa
AK		 2791
2792 /* Allow time for pending master requests to run */
2793 mac->ops.reset_hw(hw);
97ac8cae
BA		 2794
2795 /*
2796 * For parts with AMT enabled, let the firmware know
2797 * that the network interface is in control
2798 */
c43bc57e 2799 if (adapter->flags & FLAG_HAS_AMT)
97ac8cae
BA		 2800 e1000_get_hw_control(adapter);
2801
bc7f75fa 2802 ew32(WUC, 0);
a4f58f54
BA		 2803 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP)
2804 e1e_wphy(&adapter->hw, BM_WUC, 0);
bc7f75fa
AK		 2805
2806 if (mac->ops.init_hw(hw))
44defeb3 2807 e_err("Hardware Error\n");
bc7f75fa 2808
38eb394e
BA		 2809 /* additional part of the flow-control workaround above */
2810 if (hw->mac.type == e1000_pchlan)
2811 ew32(FCRTV_PCH, 0x1000);
2812
bc7f75fa
AK		 2813 e1000_update_mng_vlan(adapter);
2814
2815 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
2816 ew32(VET, ETH_P_8021Q);
2817
2818 e1000e_reset_adaptive(hw);
2819 e1000_get_phy_info(hw);
2820
918d7197
BA		 2821 if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
2822 !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
bc7f75fa 2823 u16 phy_data = 0;
ad68076e
BA		 2824 /*
2825 * speed up time to link by disabling smart power down, ignore
bc7f75fa 2826 * the return value of this function because there is nothing
ad68076e
BA		 2827 * different we would do if it failed
2828 */
bc7f75fa
AK		 2829 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
2830 phy_data &= ~IGP02E1000_PM_SPD;
2831 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
2832 }
bc7f75fa
AK		 2833}
2834
2835int e1000e_up(struct e1000_adapter *adapter)
2836{
2837 struct e1000_hw *hw = &adapter->hw;
2838
53ec5498
BA		 2839 /* DMA latency requirement to workaround early-receive/jumbo issue */
2840 if (adapter->flags & FLAG_HAS_ERT)
2841 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
2842 adapter->netdev->name,
2843 PM_QOS_DEFAULT_VALUE);
2844
bc7f75fa
AK		 2845 /* hardware has been reset, we need to reload some things */
2846 e1000_configure(adapter);
2847
2848 clear_bit(__E1000_DOWN, &adapter->state);
2849
2850 napi_enable(&adapter->napi);
4662e82b
BA		 2851 if (adapter->msix_entries)
2852 e1000_configure_msix(adapter);
bc7f75fa
AK		 2853 e1000_irq_enable(adapter);
2854
4cb9be7a
JB		 2855 netif_wake_queue(adapter->netdev);
2856
bc7f75fa
AK		 2857 /* fire a link change interrupt to start the watchdog */
2858 ew32(ICS, E1000_ICS_LSC);
2859 return 0;
2860}
2861
2862void e1000e_down(struct e1000_adapter *adapter)
2863{
2864 struct net_device *netdev = adapter->netdev;
2865 struct e1000_hw *hw = &adapter->hw;
2866 u32 tctl, rctl;
2867
ad68076e
BA		 2868 /*
2869 * signal that we're down so the interrupt handler does not
2870 * reschedule our watchdog timer
2871 */
bc7f75fa
AK		 2872 set_bit(__E1000_DOWN, &adapter->state);
2873
2874 /* disable receives in the hardware */
2875 rctl = er32(RCTL);
2876 ew32(RCTL, rctl & ~E1000_RCTL_EN);
2877 /* flush and sleep below */
2878
4cb9be7a 2879 netif_stop_queue(netdev);
bc7f75fa
AK		 2880
2881 /* disable transmits in the hardware */
2882 tctl = er32(TCTL);
2883 tctl &= ~E1000_TCTL_EN;
2884 ew32(TCTL, tctl);
2885 /* flush both disables and wait for them to finish */
2886 e1e_flush();
2887 msleep(10);
2888
2889 napi_disable(&adapter->napi);
2890 e1000_irq_disable(adapter);
2891
2892 del_timer_sync(&adapter->watchdog_timer);
2893 del_timer_sync(&adapter->phy_info_timer);
2894
2895 netdev->tx_queue_len = adapter->tx_queue_len;
2896 netif_carrier_off(netdev);
2897 adapter->link_speed = 0;
2898 adapter->link_duplex = 0;
2899
52cc3086
JK		 2900 if (!pci_channel_offline(adapter->pdev))
2901 e1000e_reset(adapter);
bc7f75fa
AK		 2902 e1000_clean_tx_ring(adapter);
2903 e1000_clean_rx_ring(adapter);
2904
53ec5498
BA		 2905 if (adapter->flags & FLAG_HAS_ERT)
2906 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
2907 adapter->netdev->name);
2908
bc7f75fa
AK		 2909 /*
2910 * TODO: for power management, we could drop the link and
2911 * pci_disable_device here.
2912 */
2913}
2914
2915void e1000e_reinit_locked(struct e1000_adapter *adapter)
2916{
2917 might_sleep();
2918 while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
2919 msleep(1);
2920 e1000e_down(adapter);
2921 e1000e_up(adapter);
2922 clear_bit(__E1000_RESETTING, &adapter->state);
2923}
2924
2925/**
2926 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
2927 * @adapter: board private structure to initialize
2928 *
2929 * e1000_sw_init initializes the Adapter private data structure.
2930 * Fields are initialized based on PCI device information and
2931 * OS network device settings (MTU size).
2932 **/
2933static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
2934{
bc7f75fa
AK		 2935 struct net_device *netdev = adapter->netdev;
2936
2937 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
2938 adapter->rx_ps_bsize0 = 128;
318a94d6
JK		 2939 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2940 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
bc7f75fa 2941
4662e82b 2942 e1000e_set_interrupt_capability(adapter);
bc7f75fa 2943
4662e82b
BA		 2944 if (e1000_alloc_queues(adapter))
2945 return -ENOMEM;
bc7f75fa 2946
bc7f75fa 2947 /* Explicitly disable IRQ since the NIC can be in any state. */
bc7f75fa
AK		 2948 e1000_irq_disable(adapter);
2949
bc7f75fa
AK		 2950 set_bit(__E1000_DOWN, &adapter->state);
2951 return 0;
bc7f75fa
AK		 2952}
2953
f8d59f78
BA		 2954/**
2955 * e1000_intr_msi_test - Interrupt Handler
2956 * @irq: interrupt number
2957 * @data: pointer to a network interface device structure
2958 **/
2959static irqreturn_t e1000_intr_msi_test(int irq, void *data)
2960{
2961 struct net_device *netdev = data;
2962 struct e1000_adapter *adapter = netdev_priv(netdev);
2963 struct e1000_hw *hw = &adapter->hw;
2964 u32 icr = er32(ICR);
2965
3bb99fe2 2966 e_dbg("icr is %08X\n", icr);
f8d59f78
BA		 2967 if (icr & E1000_ICR_RXSEQ) {
2968 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
2969 wmb();
2970 }
2971
2972 return IRQ_HANDLED;
2973}
2974
2975/**
2976 * e1000_test_msi_interrupt - Returns 0 for successful test
2977 * @adapter: board private struct
2978 *
2979 * code flow taken from tg3.c
2980 **/
2981static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
2982{
2983 struct net_device *netdev = adapter->netdev;
2984 struct e1000_hw *hw = &adapter->hw;
2985 int err;
2986
2987 /* poll_enable hasn't been called yet, so don't need disable */
2988 /* clear any pending events */
2989 er32(ICR);
2990
2991 /* free the real vector and request a test handler */
2992 e1000_free_irq(adapter);
4662e82b 2993 e1000e_reset_interrupt_capability(adapter);
f8d59f78
BA		 2994
2995 /* Assume that the test fails, if it succeeds then the test
2996 * MSI irq handler will unset this flag */
2997 adapter->flags |= FLAG_MSI_TEST_FAILED;
2998
2999 err = pci_enable_msi(adapter->pdev);
3000 if (err)
3001 goto msi_test_failed;
3002
a0607fd3 3003 err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
f8d59f78
BA		 3004 netdev->name, netdev);
3005 if (err) {
3006 pci_disable_msi(adapter->pdev);
3007 goto msi_test_failed;
3008 }
3009
3010 wmb();
3011
3012 e1000_irq_enable(adapter);
3013
3014 /* fire an unusual interrupt on the test handler */
3015 ew32(ICS, E1000_ICS_RXSEQ);
3016 e1e_flush();
3017 msleep(50);
3018
3019 e1000_irq_disable(adapter);
3020
3021 rmb();
3022
3023 if (adapter->flags & FLAG_MSI_TEST_FAILED) {
4662e82b 3024 adapter->int_mode = E1000E_INT_MODE_LEGACY;
f8d59f78
BA		 3025 err = -EIO;
3026 e_info("MSI interrupt test failed!\n");
3027 }
3028
3029 free_irq(adapter->pdev->irq, netdev);
3030 pci_disable_msi(adapter->pdev);
3031
3032 if (err == -EIO)
3033 goto msi_test_failed;
3034
3035 /* okay so the test worked, restore settings */
3bb99fe2 3036 e_dbg("MSI interrupt test succeeded!\n");
f8d59f78 3037msi_test_failed:
4662e82b 3038 e1000e_set_interrupt_capability(adapter);
f8d59f78
BA		 3039 e1000_request_irq(adapter);
3040 return err;
3041}
3042
3043/**
3044 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3045 * @adapter: board private struct
3046 *
3047 * code flow taken from tg3.c, called with e1000 interrupts disabled.
3048 **/
3049static int e1000_test_msi(struct e1000_adapter *adapter)
3050{
3051 int err;
3052 u16 pci_cmd;
3053
3054 if (!(adapter->flags & FLAG_MSI_ENABLED))
3055 return 0;
3056
3057 /* disable SERR in case the MSI write causes a master abort */
3058 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3059 pci_write_config_word(adapter->pdev, PCI_COMMAND,
3060 pci_cmd & ~PCI_COMMAND_SERR);
3061
3062 err = e1000_test_msi_interrupt(adapter);
3063
3064 /* restore previous setting of command word */
3065 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
3066
3067 /* success ! */
3068 if (!err)
3069 return 0;
3070
3071 /* EIO means MSI test failed */
3072 if (err != -EIO)
3073 return err;
3074
3075 /* back to INTx mode */
3076 e_warn("MSI interrupt test failed, using legacy interrupt.\n");
3077
3078 e1000_free_irq(adapter);
3079
3080 err = e1000_request_irq(adapter);
3081
3082 return err;
3083}
3084
bc7f75fa
AK		 3085/**
3086 * e1000_open - Called when a network interface is made active
3087 * @netdev: network interface device structure
3088 *
3089 * Returns 0 on success, negative value on failure
3090 *
3091 * The open entry point is called when a network interface is made
3092 * active by the system (IFF_UP). At this point all resources needed
3093 * for transmit and receive operations are allocated, the interrupt
3094 * handler is registered with the OS, the watchdog timer is started,
3095 * and the stack is notified that the interface is ready.
3096 **/
3097static int e1000_open(struct net_device *netdev)
3098{
3099 struct e1000_adapter *adapter = netdev_priv(netdev);
3100 struct e1000_hw *hw = &adapter->hw;
3101 int err;
3102
3103 /* disallow open during test */
3104 if (test_bit(__E1000_TESTING, &adapter->state))
3105 return -EBUSY;
3106
9c563d20
JB		 3107 netif_carrier_off(netdev);
3108
bc7f75fa
AK		 3109 /* allocate transmit descriptors */
3110 err = e1000e_setup_tx_resources(adapter);
3111 if (err)
3112 goto err_setup_tx;
3113
3114 /* allocate receive descriptors */
3115 err = e1000e_setup_rx_resources(adapter);
3116 if (err)
3117 goto err_setup_rx;
3118
3119 e1000e_power_up_phy(adapter);
3120
3121 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
3122 if ((adapter->hw.mng_cookie.status &
3123 E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
3124 e1000_update_mng_vlan(adapter);
3125
ad68076e
BA		 3126 /*
3127 * If AMT is enabled, let the firmware know that the network
3128 * interface is now open
3129 */
c43bc57e 3130 if (adapter->flags & FLAG_HAS_AMT)
bc7f75fa
AK		 3131 e1000_get_hw_control(adapter);
3132
ad68076e
BA		 3133 /*
3134 * before we allocate an interrupt, we must be ready to handle it.
bc7f75fa
AK		 3135 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3136 * as soon as we call pci_request_irq, so we have to setup our
ad68076e
BA		 3137 * clean_rx handler before we do so.
3138 */
bc7f75fa
AK		 3139 e1000_configure(adapter);
3140
3141 err = e1000_request_irq(adapter);
3142 if (err)
3143 goto err_req_irq;
3144
f8d59f78
BA		 3145 /*
3146 * Work around PCIe errata with MSI interrupts causing some chipsets to
3147 * ignore e1000e MSI messages, which means we need to test our MSI
3148 * interrupt now
3149 */
4662e82b 3150 if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
f8d59f78
BA		 3151 err = e1000_test_msi(adapter);
3152 if (err) {
3153 e_err("Interrupt allocation failed\n");
3154 goto err_req_irq;
3155 }
3156 }
3157
bc7f75fa
AK		 3158 /* From here on the code is the same as e1000e_up() */
3159 clear_bit(__E1000_DOWN, &adapter->state);
3160
3161 napi_enable(&adapter->napi);
3162
3163 e1000_irq_enable(adapter);
3164
4cb9be7a 3165 netif_start_queue(netdev);
d55b53ff 3166
bc7f75fa
AK		 3167 /* fire a link status change interrupt to start the watchdog */
3168 ew32(ICS, E1000_ICS_LSC);
3169
3170 return 0;
3171
3172err_req_irq:
3173 e1000_release_hw_control(adapter);
3174 e1000_power_down_phy(adapter);
3175 e1000e_free_rx_resources(adapter);
3176err_setup_rx:
3177 e1000e_free_tx_resources(adapter);
3178err_setup_tx:
3179 e1000e_reset(adapter);
3180
3181 return err;
3182}
3183
3184/**
3185 * e1000_close - Disables a network interface
3186 * @netdev: network interface device structure
3187 *
3188 * Returns 0, this is not allowed to fail
3189 *
3190 * The close entry point is called when an interface is de-activated
3191 * by the OS. The hardware is still under the drivers control, but
3192 * needs to be disabled. A global MAC reset is issued to stop the
3193 * hardware, and all transmit and receive resources are freed.
3194 **/
3195static int e1000_close(struct net_device *netdev)
3196{
3197 struct e1000_adapter *adapter = netdev_priv(netdev);
3198
3199 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
3200 e1000e_down(adapter);
3201 e1000_power_down_phy(adapter);
3202 e1000_free_irq(adapter);
3203
3204 e1000e_free_tx_resources(adapter);
3205 e1000e_free_rx_resources(adapter);
3206
ad68076e
BA		 3207 /*
3208 * kill manageability vlan ID if supported, but not if a vlan with
3209 * the same ID is registered on the host OS (let 8021q kill it)
3210 */
bc7f75fa
AK		 3211 if ((adapter->hw.mng_cookie.status &
3212 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
3213 !(adapter->vlgrp &&
3214 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id)))
3215 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3216
ad68076e
BA		 3217 /*
3218 * If AMT is enabled, let the firmware know that the network
3219 * interface is now closed
3220 */
c43bc57e 3221 if (adapter->flags & FLAG_HAS_AMT)
bc7f75fa
AK		 3222 e1000_release_hw_control(adapter);
3223
3224 return 0;
3225}
3226/**
3227 * e1000_set_mac - Change the Ethernet Address of the NIC
3228 * @netdev: network interface device structure
3229 * @p: pointer to an address structure
3230 *
3231 * Returns 0 on success, negative on failure
3232 **/
3233static int e1000_set_mac(struct net_device *netdev, void *p)
3234{
3235 struct e1000_adapter *adapter = netdev_priv(netdev);
3236 struct sockaddr *addr = p;
3237
3238 if (!is_valid_ether_addr(addr->sa_data))
3239 return -EADDRNOTAVAIL;
3240
3241 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3242 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
3243
3244 e1000e_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
3245
3246 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
3247 /* activate the work around */
3248 e1000e_set_laa_state_82571(&adapter->hw, 1);
3249
ad68076e
BA		 3250 /*
3251 * Hold a copy of the LAA in RAR[14] This is done so that
bc7f75fa
AK		 3252 * between the time RAR[0] gets clobbered and the time it
3253 * gets fixed (in e1000_watchdog), the actual LAA is in one
3254 * of the RARs and no incoming packets directed to this port
3255 * are dropped. Eventually the LAA will be in RAR[0] and
ad68076e
BA		 3256 * RAR[14]
3257 */
bc7f75fa
AK		 3258 e1000e_rar_set(&adapter->hw,
3259 adapter->hw.mac.addr,
3260 adapter->hw.mac.rar_entry_count - 1);
3261 }
3262
3263 return 0;
3264}
3265
a8f88ff5
JB		 3266/**
3267 * e1000e_update_phy_task - work thread to update phy
3268 * @work: pointer to our work struct
3269 *
3270 * this worker thread exists because we must acquire a
3271 * semaphore to read the phy, which we could msleep while
3272 * waiting for it, and we can't msleep in a timer.
3273 **/
3274static void e1000e_update_phy_task(struct work_struct *work)
3275{
3276 struct e1000_adapter *adapter = container_of(work,
3277 struct e1000_adapter, update_phy_task);
3278 e1000_get_phy_info(&adapter->hw);
3279}
3280
ad68076e
BA		 3281/*
3282 * Need to wait a few seconds after link up to get diagnostic information from
3283 * the phy
3284 */
bc7f75fa
AK		 3285static void e1000_update_phy_info(unsigned long data)
3286{
3287 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
a8f88ff5 3288 schedule_work(&adapter->update_phy_task);
bc7f75fa
AK		 3289}
3290
3291/**
3292 * e1000e_update_stats - Update the board statistics counters
3293 * @adapter: board private structure
3294 **/
3295void e1000e_update_stats(struct e1000_adapter *adapter)
3296{
7274c20f 3297 struct net_device *netdev = adapter->netdev;
bc7f75fa
AK		 3298 struct e1000_hw *hw = &adapter->hw;
3299 struct pci_dev *pdev = adapter->pdev;
a4f58f54 3300 u16 phy_data;
bc7f75fa
AK		 3301
3302 /*
3303 * Prevent stats update while adapter is being reset, or if the pci
3304 * connection is down.
3305 */
3306 if (adapter->link_speed == 0)
3307 return;
3308 if (pci_channel_offline(pdev))
3309 return;
3310
bc7f75fa
AK		 3311 adapter->stats.crcerrs += er32(CRCERRS);
3312 adapter->stats.gprc += er32(GPRC);
7c25769f
BA		 3313 adapter->stats.gorc += er32(GORCL);
3314 er32(GORCH); /* Clear gorc */
bc7f75fa
AK		 3315 adapter->stats.bprc += er32(BPRC);
3316 adapter->stats.mprc += er32(MPRC);
3317 adapter->stats.roc += er32(ROC);
3318
bc7f75fa 3319 adapter->stats.mpc += er32(MPC);
a4f58f54
BA		 3320 if ((hw->phy.type == e1000_phy_82578) ||
3321 (hw->phy.type == e1000_phy_82577)) {
3322 e1e_rphy(hw, HV_SCC_UPPER, &phy_data);
29477e24
BA		 3323 if (!e1e_rphy(hw, HV_SCC_LOWER, &phy_data))
3324 adapter->stats.scc += phy_data;
a4f58f54
BA		 3325
3326 e1e_rphy(hw, HV_ECOL_UPPER, &phy_data);
29477e24
BA		 3327 if (!e1e_rphy(hw, HV_ECOL_LOWER, &phy_data))
3328 adapter->stats.ecol += phy_data;
a4f58f54
BA		 3329
3330 e1e_rphy(hw, HV_MCC_UPPER, &phy_data);
29477e24
BA		 3331 if (!e1e_rphy(hw, HV_MCC_LOWER, &phy_data))
3332 adapter->stats.mcc += phy_data;
a4f58f54
BA		 3333
3334 e1e_rphy(hw, HV_LATECOL_UPPER, &phy_data);
29477e24
BA		 3335 if (!e1e_rphy(hw, HV_LATECOL_LOWER, &phy_data))
3336 adapter->stats.latecol += phy_data;
a4f58f54
BA		 3337
3338 e1e_rphy(hw, HV_DC_UPPER, &phy_data);
29477e24
BA		 3339 if (!e1e_rphy(hw, HV_DC_LOWER, &phy_data))
3340 adapter->stats.dc += phy_data;
a4f58f54
BA		 3341 } else {
3342 adapter->stats.scc += er32(SCC);
3343 adapter->stats.ecol += er32(ECOL);
3344 adapter->stats.mcc += er32(MCC);
3345 adapter->stats.latecol += er32(LATECOL);
3346 adapter->stats.dc += er32(DC);
3347 }
bc7f75fa
AK		 3348 adapter->stats.xonrxc += er32(XONRXC);
3349 adapter->stats.xontxc += er32(XONTXC);
3350 adapter->stats.xoffrxc += er32(XOFFRXC);
3351 adapter->stats.xofftxc += er32(XOFFTXC);
bc7f75fa 3352 adapter->stats.gptc += er32(GPTC);
7c25769f
BA		 3353 adapter->stats.gotc += er32(GOTCL);
3354 er32(GOTCH); /* Clear gotc */
bc7f75fa
AK		 3355 adapter->stats.rnbc += er32(RNBC);
3356 adapter->stats.ruc += er32(RUC);
bc7f75fa
AK		 3357
3358 adapter->stats.mptc += er32(MPTC);
3359 adapter->stats.bptc += er32(BPTC);
3360
3361 /* used for adaptive IFS */
3362
3363 hw->mac.tx_packet_delta = er32(TPT);
3364 adapter->stats.tpt += hw->mac.tx_packet_delta;
a4f58f54
BA		 3365 if ((hw->phy.type == e1000_phy_82578) ||
3366 (hw->phy.type == e1000_phy_82577)) {
3367 e1e_rphy(hw, HV_COLC_UPPER, &phy_data);
29477e24
BA		 3368 if (!e1e_rphy(hw, HV_COLC_LOWER, &phy_data))
3369 hw->mac.collision_delta = phy_data;
a4f58f54
BA		 3370 } else {
3371 hw->mac.collision_delta = er32(COLC);
3372 }
bc7f75fa
AK		 3373 adapter->stats.colc += hw->mac.collision_delta;
3374
3375 adapter->stats.algnerrc += er32(ALGNERRC);
3376 adapter->stats.rxerrc += er32(RXERRC);
a4f58f54
BA		 3377 if ((hw->phy.type == e1000_phy_82578) ||
3378 (hw->phy.type == e1000_phy_82577)) {
3379 e1e_rphy(hw, HV_TNCRS_UPPER, &phy_data);
29477e24
BA		 3380 if (!e1e_rphy(hw, HV_TNCRS_LOWER, &phy_data))
3381 adapter->stats.tncrs += phy_data;
a4f58f54
BA		 3382 } else {
3383 if ((hw->mac.type != e1000_82574) &&
3384 (hw->mac.type != e1000_82583))
3385 adapter->stats.tncrs += er32(TNCRS);
3386 }
bc7f75fa
AK		 3387 adapter->stats.cexterr += er32(CEXTERR);
3388 adapter->stats.tsctc += er32(TSCTC);
3389 adapter->stats.tsctfc += er32(TSCTFC);
3390
bc7f75fa 3391 /* Fill out the OS statistics structure */
7274c20f
AK		 3392 netdev->stats.multicast = adapter->stats.mprc;
3393 netdev->stats.collisions = adapter->stats.colc;
bc7f75fa
AK		 3394
3395 /* Rx Errors */
3396
ad68076e
BA		 3397 /*
3398 * RLEC on some newer hardware can be incorrect so build
3399 * our own version based on RUC and ROC
3400 */
7274c20f 3401 netdev->stats.rx_errors = adapter->stats.rxerrc +
bc7f75fa
AK		 3402 adapter->stats.crcerrs + adapter->stats.algnerrc +
3403 adapter->stats.ruc + adapter->stats.roc +
3404 adapter->stats.cexterr;
7274c20f 3405 netdev->stats.rx_length_errors = adapter->stats.ruc +
bc7f75fa 3406 adapter->stats.roc;
7274c20f
AK		 3407 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3408 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3409 netdev->stats.rx_missed_errors = adapter->stats.mpc;
bc7f75fa
AK		 3410
3411 /* Tx Errors */
7274c20f 3412 netdev->stats.tx_errors = adapter->stats.ecol +
bc7f75fa 3413 adapter->stats.latecol;
7274c20f
AK		 3414 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3415 netdev->stats.tx_window_errors = adapter->stats.latecol;
3416 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
bc7f75fa
AK		 3417
3418 /* Tx Dropped needs to be maintained elsewhere */
3419
bc7f75fa
AK		 3420 /* Management Stats */
3421 adapter->stats.mgptc += er32(MGTPTC);
3422 adapter->stats.mgprc += er32(MGTPRC);
3423 adapter->stats.mgpdc += er32(MGTPDC);
bc7f75fa
AK		 3424}
3425
7c25769f
BA		 3426/**
3427 * e1000_phy_read_status - Update the PHY register status snapshot
3428 * @adapter: board private structure
3429 **/
3430static void e1000_phy_read_status(struct e1000_adapter *adapter)
3431{
3432 struct e1000_hw *hw = &adapter->hw;
3433 struct e1000_phy_regs *phy = &adapter->phy_regs;
3434 int ret_val;
7c25769f
BA		 3435
3436 if ((er32(STATUS) & E1000_STATUS_LU) &&
3437 (adapter->hw.phy.media_type == e1000_media_type_copper)) {
3438 ret_val = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
3439 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
3440 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
3441 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
3442 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
3443 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
3444 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
3445 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
3446 if (ret_val)
44defeb3 3447 e_warn("Error reading PHY register\n");
7c25769f
BA		 3448 } else {
3449 /*
3450 * Do not read PHY registers if link is not up
3451 * Set values to typical power-on defaults
3452 */
3453 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
3454 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
3455 BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
3456 BMSR_ERCAP);
3457 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
3458 ADVERTISE_ALL | ADVERTISE_CSMA);
3459 phy->lpa = 0;
3460 phy->expansion = EXPANSION_ENABLENPAGE;
3461 phy->ctrl1000 = ADVERTISE_1000FULL;
3462 phy->stat1000 = 0;
3463 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
3464 }
7c25769f
BA		 3465}
3466
bc7f75fa
AK		 3467static void e1000_print_link_info(struct e1000_adapter *adapter)
3468{
bc7f75fa
AK		 3469 struct e1000_hw *hw = &adapter->hw;
3470 u32 ctrl = er32(CTRL);
3471
8f12fe86
BA		 3472 /* Link status message must follow this format for user tools */
3473 printk(KERN_INFO "e1000e: %s NIC Link is Up %d Mbps %s, "
3474 "Flow Control: %s\n",
3475 adapter->netdev->name,
44defeb3
JK		 3476 adapter->link_speed,
3477 (adapter->link_duplex == FULL_DUPLEX) ?
3478 "Full Duplex" : "Half Duplex",
3479 ((ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE)) ?
3480 "RX/TX" :
3481 ((ctrl & E1000_CTRL_RFCE) ? "RX" :
3482 ((ctrl & E1000_CTRL_TFCE) ? "TX" : "None" )));
bc7f75fa
AK		 3483}
3484
a20e4cf9 3485bool e1000_has_link(struct e1000_adapter *adapter)
318a94d6
JK		 3486{
3487 struct e1000_hw *hw = &adapter->hw;
3488 bool link_active = 0;
3489 s32 ret_val = 0;
3490
3491 /*
3492 * get_link_status is set on LSC (link status) interrupt or
3493 * Rx sequence error interrupt. get_link_status will stay
3494 * false until the check_for_link establishes link
3495 * for copper adapters ONLY
3496 */
3497 switch (hw->phy.media_type) {
3498 case e1000_media_type_copper:
3499 if (hw->mac.get_link_status) {
3500 ret_val = hw->mac.ops.check_for_link(hw);
3501 link_active = !hw->mac.get_link_status;
3502 } else {
3503 link_active = 1;
3504 }
3505 break;
3506 case e1000_media_type_fiber:
3507 ret_val = hw->mac.ops.check_for_link(hw);
3508 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
3509 break;
3510 case e1000_media_type_internal_serdes:
3511 ret_val = hw->mac.ops.check_for_link(hw);
3512 link_active = adapter->hw.mac.serdes_has_link;
3513 break;
3514 default:
3515 case e1000_media_type_unknown:
3516 break;
3517 }
3518
3519 if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
3520 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
3521 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
44defeb3 3522 e_info("Gigabit has been disabled, downgrading speed\n");
318a94d6
JK		 3523 }
3524
3525 return link_active;
3526}
3527
3528static void e1000e_enable_receives(struct e1000_adapter *adapter)
3529{
3530 /* make sure the receive unit is started */
3531 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
3532 (adapter->flags & FLAG_RX_RESTART_NOW)) {
3533 struct e1000_hw *hw = &adapter->hw;
3534 u32 rctl = er32(RCTL);
3535 ew32(RCTL, rctl | E1000_RCTL_EN);
3536 adapter->flags &= ~FLAG_RX_RESTART_NOW;
3537 }
3538}
3539
bc7f75fa
AK		 3540/**
3541 * e1000_watchdog - Timer Call-back
3542 * @data: pointer to adapter cast into an unsigned long
3543 **/
3544static void e1000_watchdog(unsigned long data)
3545{
3546 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3547
3548 /* Do the rest outside of interrupt context */
3549 schedule_work(&adapter->watchdog_task);
3550
3551 /* TODO: make this use queue_delayed_work() */
3552}
3553
3554static void e1000_watchdog_task(struct work_struct *work)
3555{
3556 struct e1000_adapter *adapter = container_of(work,
3557 struct e1000_adapter, watchdog_task);
bc7f75fa
AK		 3558 struct net_device *netdev = adapter->netdev;
3559 struct e1000_mac_info *mac = &adapter->hw.mac;
75eb0fad 3560 struct e1000_phy_info *phy = &adapter->hw.phy;
bc7f75fa
AK		 3561 struct e1000_ring *tx_ring = adapter->tx_ring;
3562 struct e1000_hw *hw = &adapter->hw;
3563 u32 link, tctl;
bc7f75fa
AK		 3564 int tx_pending = 0;
3565
318a94d6
JK		 3566 link = e1000_has_link(adapter);
3567 if ((netif_carrier_ok(netdev)) && link) {
3568 e1000e_enable_receives(adapter);
bc7f75fa 3569 goto link_up;
bc7f75fa
AK		 3570 }
3571
3572 if ((e1000e_enable_tx_pkt_filtering(hw)) &&
3573 (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
3574 e1000_update_mng_vlan(adapter);
3575
bc7f75fa
AK		 3576 if (link) {
3577 if (!netif_carrier_ok(netdev)) {
3578 bool txb2b = 1;
318a94d6 3579 /* update snapshot of PHY registers on LSC */
7c25769f 3580 e1000_phy_read_status(adapter);
bc7f75fa
AK		 3581 mac->ops.get_link_up_info(&adapter->hw,
3582 &adapter->link_speed,
3583 &adapter->link_duplex);
3584 e1000_print_link_info(adapter);
f4187b56
BA		 3585 /*
3586 * On supported PHYs, check for duplex mismatch only
3587 * if link has autonegotiated at 10/100 half
3588 */
3589 if ((hw->phy.type == e1000_phy_igp_3 ||
3590 hw->phy.type == e1000_phy_bm) &&
3591 (hw->mac.autoneg == true) &&
3592 (adapter->link_speed == SPEED_10 ||
3593 adapter->link_speed == SPEED_100) &&
3594 (adapter->link_duplex == HALF_DUPLEX)) {
3595 u16 autoneg_exp;
3596
3597 e1e_rphy(hw, PHY_AUTONEG_EXP, &autoneg_exp);
3598
3599 if (!(autoneg_exp & NWAY_ER_LP_NWAY_CAPS))
3600 e_info("Autonegotiated half duplex but"
3601 " link partner cannot autoneg. "
3602 " Try forcing full duplex if "
3603 "link gets many collisions.\n");
3604 }
3605
ad68076e
BA		 3606 /*
3607 * tweak tx_queue_len according to speed/duplex
3608 * and adjust the timeout factor
3609 */
bc7f75fa
AK		 3610 netdev->tx_queue_len = adapter->tx_queue_len;
3611 adapter->tx_timeout_factor = 1;
3612 switch (adapter->link_speed) {
3613 case SPEED_10:
3614 txb2b = 0;
3615 netdev->tx_queue_len = 10;
10f1b492 3616 adapter->tx_timeout_factor = 16;
bc7f75fa
AK		 3617 break;
3618 case SPEED_100:
3619 txb2b = 0;
3620 netdev->tx_queue_len = 100;
4c86e0b9 3621 adapter->tx_timeout_factor = 10;
bc7f75fa
AK		 3622 break;
3623 }
3624
ad68076e
BA		 3625 /*
3626 * workaround: re-program speed mode bit after
3627 * link-up event
3628 */
bc7f75fa
AK		 3629 if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
3630 !txb2b) {
3631 u32 tarc0;
e9ec2c0f 3632 tarc0 = er32(TARC(0));
bc7f75fa 3633 tarc0 &= ~SPEED_MODE_BIT;
e9ec2c0f 3634 ew32(TARC(0), tarc0);
bc7f75fa
AK		 3635 }
3636
ad68076e
BA		 3637 /*
3638 * disable TSO for pcie and 10/100 speeds, to avoid
3639 * some hardware issues
3640 */
bc7f75fa
AK		 3641 if (!(adapter->flags & FLAG_TSO_FORCE)) {
3642 switch (adapter->link_speed) {
3643 case SPEED_10:
3644 case SPEED_100:
44defeb3 3645 e_info("10/100 speed: disabling TSO\n");
bc7f75fa
AK		 3646 netdev->features &= ~NETIF_F_TSO;
3647 netdev->features &= ~NETIF_F_TSO6;
3648 break;
3649 case SPEED_1000:
3650 netdev->features |= NETIF_F_TSO;
3651 netdev->features |= NETIF_F_TSO6;
3652 break;
3653 default:
3654 /* oops */
3655 break;
3656 }
3657 }
3658
ad68076e
BA		 3659 /*
3660 * enable transmits in the hardware, need to do this
3661 * after setting TARC(0)
3662 */
bc7f75fa
AK		 3663 tctl = er32(TCTL);
3664 tctl |= E1000_TCTL_EN;
3665 ew32(TCTL, tctl);
3666
75eb0fad
BA		 3667 /*
3668 * Perform any post-link-up configuration before
3669 * reporting link up.
3670 */
3671 if (phy->ops.cfg_on_link_up)
3672 phy->ops.cfg_on_link_up(hw);
3673
bc7f75fa 3674 netif_carrier_on(netdev);
bc7f75fa
AK		 3675
3676 if (!test_bit(__E1000_DOWN, &adapter->state))
3677 mod_timer(&adapter->phy_info_timer,
3678 round_jiffies(jiffies + 2 * HZ));
bc7f75fa
AK		 3679 }
3680 } else {
3681 if (netif_carrier_ok(netdev)) {
3682 adapter->link_speed = 0;
3683 adapter->link_duplex = 0;
8f12fe86
BA		 3684 /* Link status message must follow this format */
3685 printk(KERN_INFO "e1000e: %s NIC Link is Down\n",
3686 adapter->netdev->name);
bc7f75fa 3687 netif_carrier_off(netdev);
bc7f75fa
AK		 3688 if (!test_bit(__E1000_DOWN, &adapter->state))
3689 mod_timer(&adapter->phy_info_timer,
3690 round_jiffies(jiffies + 2 * HZ));
3691
3692 if (adapter->flags & FLAG_RX_NEEDS_RESTART)
3693 schedule_work(&adapter->reset_task);
3694 }
3695 }
3696
3697link_up:
3698 e1000e_update_stats(adapter);
3699
3700 mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
3701 adapter->tpt_old = adapter->stats.tpt;
3702 mac->collision_delta = adapter->stats.colc - adapter->colc_old;
3703 adapter->colc_old = adapter->stats.colc;
3704
7c25769f
BA		 3705 adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
3706 adapter->gorc_old = adapter->stats.gorc;
3707 adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
3708 adapter->gotc_old = adapter->stats.gotc;
bc7f75fa
AK		 3709
3710 e1000e_update_adaptive(&adapter->hw);
3711
3712 if (!netif_carrier_ok(netdev)) {
3713 tx_pending = (e1000_desc_unused(tx_ring) + 1 <
3714 tx_ring->count);
3715 if (tx_pending) {
ad68076e
BA		 3716 /*
3717 * We've lost link, so the controller stops DMA,
bc7f75fa
AK		 3718 * but we've got queued Tx work that's never going
3719 * to get done, so reset controller to flush Tx.
ad68076e
BA		 3720 * (Do the reset outside of interrupt context).
3721 */
bc7f75fa
AK		 3722 adapter->tx_timeout_count++;
3723 schedule_work(&adapter->reset_task);
c2d5ab49
JB		 3724 /* return immediately since reset is imminent */
3725 return;
bc7f75fa
AK		 3726 }
3727 }
3728
ad68076e 3729 /* Cause software interrupt to ensure Rx ring is cleaned */
4662e82b
BA		 3730 if (adapter->msix_entries)
3731 ew32(ICS, adapter->rx_ring->ims_val);
3732 else
3733 ew32(ICS, E1000_ICS_RXDMT0);
bc7f75fa
AK		 3734
3735 /* Force detection of hung controller every watchdog period */
3736 adapter->detect_tx_hung = 1;
3737
ad68076e
BA		 3738 /*
3739 * With 82571 controllers, LAA may be overwritten due to controller
3740 * reset from the other port. Set the appropriate LAA in RAR[0]
3741 */
bc7f75fa
AK		 3742 if (e1000e_get_laa_state_82571(hw))
3743 e1000e_rar_set(hw, adapter->hw.mac.addr, 0);
3744
3745 /* Reset the timer */
3746 if (!test_bit(__E1000_DOWN, &adapter->state))
3747 mod_timer(&adapter->watchdog_timer,
3748 round_jiffies(jiffies + 2 * HZ));
3749}
3750
3751#define E1000_TX_FLAGS_CSUM 0x00000001
3752#define E1000_TX_FLAGS_VLAN 0x00000002
3753#define E1000_TX_FLAGS_TSO 0x00000004
3754#define E1000_TX_FLAGS_IPV4 0x00000008
3755#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
3756#define E1000_TX_FLAGS_VLAN_SHIFT 16
3757
3758static int e1000_tso(struct e1000_adapter *adapter,
3759 struct sk_buff *skb)
3760{
3761 struct e1000_ring *tx_ring = adapter->tx_ring;
3762 struct e1000_context_desc *context_desc;
3763 struct e1000_buffer *buffer_info;
3764 unsigned int i;
3765 u32 cmd_length = 0;
3766 u16 ipcse = 0, tucse, mss;
3767 u8 ipcss, ipcso, tucss, tucso, hdr_len;
3768 int err;
3769
3d5e33c9
BA		 3770 if (!skb_is_gso(skb))
3771 return 0;
bc7f75fa 3772
3d5e33c9
BA		 3773 if (skb_header_cloned(skb)) {
3774 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3775 if (err)
3776 return err;
bc7f75fa
AK		 3777 }
3778
3d5e33c9
BA		 3779 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3780 mss = skb_shinfo(skb)->gso_size;
3781 if (skb->protocol == htons(ETH_P_IP)) {
3782 struct iphdr *iph = ip_hdr(skb);
3783 iph->tot_len = 0;
3784 iph->check = 0;
3785 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
3786 0, IPPROTO_TCP, 0);
3787 cmd_length = E1000_TXD_CMD_IP;
3788 ipcse = skb_transport_offset(skb) - 1;
3789 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
3790 ipv6_hdr(skb)->payload_len = 0;
3791 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3792 &ipv6_hdr(skb)->daddr,
3793 0, IPPROTO_TCP, 0);
3794 ipcse = 0;
3795 }
3796 ipcss = skb_network_offset(skb);
3797 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
3798 tucss = skb_transport_offset(skb);
3799 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
3800 tucse = 0;
3801
3802 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
3803 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
3804
3805 i = tx_ring->next_to_use;
3806 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3807 buffer_info = &tx_ring->buffer_info[i];
3808
3809 context_desc->lower_setup.ip_fields.ipcss = ipcss;
3810 context_desc->lower_setup.ip_fields.ipcso = ipcso;
3811 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
3812 context_desc->upper_setup.tcp_fields.tucss = tucss;
3813 context_desc->upper_setup.tcp_fields.tucso = tucso;
3814 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
3815 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
3816 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
3817 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
3818
3819 buffer_info->time_stamp = jiffies;
3820 buffer_info->next_to_watch = i;
3821
3822 i++;
3823 if (i == tx_ring->count)
3824 i = 0;
3825 tx_ring->next_to_use = i;
3826
3827 return 1;
bc7f75fa
AK		 3828}
3829
3830static bool e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
3831{
3832 struct e1000_ring *tx_ring = adapter->tx_ring;
3833 struct e1000_context_desc *context_desc;
3834 struct e1000_buffer *buffer_info;
3835 unsigned int i;
3836 u8 css;
af807c82 3837 u32 cmd_len = E1000_TXD_CMD_DEXT;
5f66f208 3838 __be16 protocol;
bc7f75fa 3839
af807c82
DG		 3840 if (skb->ip_summed != CHECKSUM_PARTIAL)
3841 return 0;
bc7f75fa 3842
5f66f208
AJ		 3843 if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
3844 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
3845 else
3846 protocol = skb->protocol;
3847
3f518390 3848 switch (protocol) {
09640e63 3849 case cpu_to_be16(ETH_P_IP):
af807c82
DG		 3850 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
3851 cmd_len |= E1000_TXD_CMD_TCP;
3852 break;
09640e63 3853 case cpu_to_be16(ETH_P_IPV6):
af807c82
DG		 3854 /* XXX not handling all IPV6 headers */
3855 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3856 cmd_len |= E1000_TXD_CMD_TCP;
3857 break;
3858 default:
3859 if (unlikely(net_ratelimit()))
5f66f208
AJ		 3860 e_warn("checksum_partial proto=%x!\n",
3861 be16_to_cpu(protocol));
af807c82 3862 break;
bc7f75fa
AK		 3863 }
3864
af807c82
DG		 3865 css = skb_transport_offset(skb);
3866
3867 i = tx_ring->next_to_use;
3868 buffer_info = &tx_ring->buffer_info[i];
3869 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3870
3871 context_desc->lower_setup.ip_config = 0;
3872 context_desc->upper_setup.tcp_fields.tucss = css;
3873 context_desc->upper_setup.tcp_fields.tucso =
3874 css + skb->csum_offset;
3875 context_desc->upper_setup.tcp_fields.tucse = 0;
3876 context_desc->tcp_seg_setup.data = 0;
3877 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
3878
3879 buffer_info->time_stamp = jiffies;
3880 buffer_info->next_to_watch = i;
3881
3882 i++;
3883 if (i == tx_ring->count)
3884 i = 0;
3885 tx_ring->next_to_use = i;
3886
3887 return 1;
bc7f75fa
AK		 3888}
3889
3890#define E1000_MAX_PER_TXD 8192
3891#define E1000_MAX_TXD_PWR 12
3892
3893static int e1000_tx_map(struct e1000_adapter *adapter,
3894 struct sk_buff *skb, unsigned int first,
3895 unsigned int max_per_txd, unsigned int nr_frags,
3896 unsigned int mss)
3897{
3898 struct e1000_ring *tx_ring = adapter->tx_ring;
03b1320d 3899 struct pci_dev *pdev = adapter->pdev;
1b7719c4 3900 struct e1000_buffer *buffer_info;
8ddc951c 3901 unsigned int len = skb_headlen(skb);
03b1320d 3902 unsigned int offset = 0, size, count = 0, i;
bc7f75fa
AK		 3903 unsigned int f;
3904
3905 i = tx_ring->next_to_use;
3906
3907 while (len) {
1b7719c4 3908 buffer_info = &tx_ring->buffer_info[i];
bc7f75fa
AK		 3909 size = min(len, max_per_txd);
3910
bc7f75fa 3911 buffer_info->length = size;
bc7f75fa 3912 buffer_info->time_stamp = jiffies;
bc7f75fa 3913 buffer_info->next_to_watch = i;
03b1320d
AD		 3914 buffer_info->dma = pci_map_single(pdev, skb->data + offset,
3915 size, PCI_DMA_TODEVICE);
3916 buffer_info->mapped_as_page = false;
3917 if (pci_dma_mapping_error(pdev, buffer_info->dma))
3918 goto dma_error;
bc7f75fa
AK		 3919
3920 len -= size;
3921 offset += size;
03b1320d 3922 count++;
1b7719c4
AD		 3923
3924 if (len) {
3925 i++;
3926 if (i == tx_ring->count)
3927 i = 0;
3928 }
bc7f75fa
AK		 3929 }
3930
3931 for (f = 0; f < nr_frags; f++) {
3932 struct skb_frag_struct *frag;
3933
3934 frag = &skb_shinfo(skb)->frags[f];
3935 len = frag->size;
03b1320d 3936 offset = frag->page_offset;
bc7f75fa
AK		 3937
3938 while (len) {
1b7719c4
AD		 3939 i++;
3940 if (i == tx_ring->count)
3941 i = 0;
3942
bc7f75fa
AK		 3943 buffer_info = &tx_ring->buffer_info[i];
3944 size = min(len, max_per_txd);
bc7f75fa
AK		 3945
3946 buffer_info->length = size;
3947 buffer_info->time_stamp = jiffies;
bc7f75fa 3948 buffer_info->next_to_watch = i;
03b1320d
AD		 3949 buffer_info->dma = pci_map_page(pdev, frag->page,
3950 offset, size,
3951 PCI_DMA_TODEVICE);
3952 buffer_info->mapped_as_page = true;
3953 if (pci_dma_mapping_error(pdev, buffer_info->dma))
3954 goto dma_error;
bc7f75fa
AK		 3955
3956 len -= size;
3957 offset += size;
3958 count++;
bc7f75fa
AK		 3959 }
3960 }
3961
bc7f75fa
AK		 3962 tx_ring->buffer_info[i].skb = skb;
3963 tx_ring->buffer_info[first].next_to_watch = i;
3964
3965 return count;
03b1320d
AD		 3966
3967dma_error:
3968 dev_err(&pdev->dev, "TX DMA map failed\n");
3969 buffer_info->dma = 0;
c1fa347f 3970 if (count)
03b1320d 3971 count--;
c1fa347f
RK		 3972
3973 while (count--) {
3974 if (i==0)
03b1320d 3975 i += tx_ring->count;
c1fa347f 3976 i--;
03b1320d
AD		 3977 buffer_info = &tx_ring->buffer_info[i];
3978 e1000_put_txbuf(adapter, buffer_info);;
3979 }
3980
3981 return 0;
bc7f75fa
AK		 3982}
3983
3984static void e1000_tx_queue(struct e1000_adapter *adapter,
3985 int tx_flags, int count)
3986{
3987 struct e1000_ring *tx_ring = adapter->tx_ring;
3988 struct e1000_tx_desc *tx_desc = NULL;
3989 struct e1000_buffer *buffer_info;
3990 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3991 unsigned int i;
3992
3993 if (tx_flags & E1000_TX_FLAGS_TSO) {
3994 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3995 E1000_TXD_CMD_TSE;
3996 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3997
3998 if (tx_flags & E1000_TX_FLAGS_IPV4)
3999 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
4000 }
4001
4002 if (tx_flags & E1000_TX_FLAGS_CSUM) {
4003 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
4004 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4005 }
4006
4007 if (tx_flags & E1000_TX_FLAGS_VLAN) {
4008 txd_lower |= E1000_TXD_CMD_VLE;
4009 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
4010 }
4011
4012 i = tx_ring->next_to_use;
4013
4014 while (count--) {
4015 buffer_info = &tx_ring->buffer_info[i];
4016 tx_desc = E1000_TX_DESC(*tx_ring, i);
4017 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4018 tx_desc->lower.data =
4019 cpu_to_le32(txd_lower | buffer_info->length);
4020 tx_desc->upper.data = cpu_to_le32(txd_upper);
4021
4022 i++;
4023 if (i == tx_ring->count)
4024 i = 0;
4025 }
4026
4027 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
4028
ad68076e
BA		 4029 /*
4030 * Force memory writes to complete before letting h/w
bc7f75fa
AK		 4031 * know there are new descriptors to fetch. (Only
4032 * applicable for weak-ordered memory model archs,
ad68076e
BA		 4033 * such as IA-64).
4034 */
bc7f75fa
AK		 4035 wmb();
4036
4037 tx_ring->next_to_use = i;
4038 writel(i, adapter->hw.hw_addr + tx_ring->tail);
ad68076e
BA		 4039 /*
4040 * we need this if more than one processor can write to our tail
4041 * at a time, it synchronizes IO on IA64/Altix systems
4042 */
bc7f75fa
AK		 4043 mmiowb();
4044}
4045
4046#define MINIMUM_DHCP_PACKET_SIZE 282
4047static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
4048 struct sk_buff *skb)
4049{
4050 struct e1000_hw *hw = &adapter->hw;
4051 u16 length, offset;
4052
4053 if (vlan_tx_tag_present(skb)) {
8e95a202
JP		 4054 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
4055 (adapter->hw.mng_cookie.status &
bc7f75fa
AK		 4056 E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
4057 return 0;
4058 }
4059
4060 if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
4061 return 0;
4062
4063 if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
4064 return 0;
4065
4066 {
4067 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
4068 struct udphdr *udp;
4069
4070 if (ip->protocol != IPPROTO_UDP)
4071 return 0;
4072
4073 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
4074 if (ntohs(udp->dest) != 67)
4075 return 0;
4076
4077 offset = (u8 *)udp + 8 - skb->data;
4078 length = skb->len - offset;
4079 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
4080 }
4081
4082 return 0;
4083}
4084
4085static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
4086{
4087 struct e1000_adapter *adapter = netdev_priv(netdev);
4088
4089 netif_stop_queue(netdev);
ad68076e
BA		 4090 /*
4091 * Herbert's original patch had:
bc7f75fa 4092 * smp_mb__after_netif_stop_queue();
ad68076e
BA		 4093 * but since that doesn't exist yet, just open code it.
4094 */
bc7f75fa
AK		 4095 smp_mb();
4096
ad68076e
BA		 4097 /*
4098 * We need to check again in a case another CPU has just
4099 * made room available.
4100 */
bc7f75fa
AK		 4101 if (e1000_desc_unused(adapter->tx_ring) < size)
4102 return -EBUSY;
4103
4104 /* A reprieve! */
4105 netif_start_queue(netdev);
4106 ++adapter->restart_queue;
4107 return 0;
4108}
4109
4110static int e1000_maybe_stop_tx(struct net_device *netdev, int size)
4111{
4112 struct e1000_adapter *adapter = netdev_priv(netdev);
4113
4114 if (e1000_desc_unused(adapter->tx_ring) >= size)
4115 return 0;
4116 return __e1000_maybe_stop_tx(netdev, size);
4117}
4118
4119#define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3b29a56d
SH		 4120static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
4121 struct net_device *netdev)
bc7f75fa
AK		 4122{
4123 struct e1000_adapter *adapter = netdev_priv(netdev);
4124 struct e1000_ring *tx_ring = adapter->tx_ring;
4125 unsigned int first;
4126 unsigned int max_per_txd = E1000_MAX_PER_TXD;
4127 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
4128 unsigned int tx_flags = 0;
4e6c709c 4129 unsigned int len = skb->len - skb->data_len;
4e6c709c
AK		 4130 unsigned int nr_frags;
4131 unsigned int mss;
bc7f75fa
AK		 4132 int count = 0;
4133 int tso;
4134 unsigned int f;
bc7f75fa
AK		 4135
4136 if (test_bit(__E1000_DOWN, &adapter->state)) {
4137 dev_kfree_skb_any(skb);
4138 return NETDEV_TX_OK;
4139 }
4140
4141 if (skb->len <= 0) {
4142 dev_kfree_skb_any(skb);
4143 return NETDEV_TX_OK;
4144 }
4145
4146 mss = skb_shinfo(skb)->gso_size;
ad68076e
BA		 4147 /*
4148 * The controller does a simple calculation to
bc7f75fa
AK		 4149 * make sure there is enough room in the FIFO before
4150 * initiating the DMA for each buffer. The calc is:
4151 * 4 = ceil(buffer len/mss). To make sure we don't
4152 * overrun the FIFO, adjust the max buffer len if mss
ad68076e
BA		 4153 * drops.
4154 */
bc7f75fa
AK		 4155 if (mss) {
4156 u8 hdr_len;
4157 max_per_txd = min(mss << 2, max_per_txd);
4158 max_txd_pwr = fls(max_per_txd) - 1;
4159
ad68076e
BA		 4160 /*
4161 * TSO Workaround for 82571/2/3 Controllers -- if skb->data
4162 * points to just header, pull a few bytes of payload from
4163 * frags into skb->data
4164 */
bc7f75fa 4165 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
ad68076e
BA		 4166 /*
4167 * we do this workaround for ES2LAN, but it is un-necessary,
4168 * avoiding it could save a lot of cycles
4169 */
4e6c709c 4170 if (skb->data_len && (hdr_len == len)) {
bc7f75fa
AK		 4171 unsigned int pull_size;
4172
4173 pull_size = min((unsigned int)4, skb->data_len);
4174 if (!__pskb_pull_tail(skb, pull_size)) {
44defeb3 4175 e_err("__pskb_pull_tail failed.\n");
bc7f75fa
AK		 4176 dev_kfree_skb_any(skb);
4177 return NETDEV_TX_OK;
4178 }
4179 len = skb->len - skb->data_len;
4180 }
4181 }
4182
4183 /* reserve a descriptor for the offload context */
4184 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
4185 count++;
4186 count++;
4187
4188 count += TXD_USE_COUNT(len, max_txd_pwr);
4189
4190 nr_frags = skb_shinfo(skb)->nr_frags;
4191 for (f = 0; f < nr_frags; f++)
4192 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
4193 max_txd_pwr);
4194
4195 if (adapter->hw.mac.tx_pkt_filtering)
4196 e1000_transfer_dhcp_info(adapter, skb);
4197
ad68076e
BA		 4198 /*
4199 * need: count + 2 desc gap to keep tail from touching
4200 * head, otherwise try next time
4201 */
92af3e95 4202 if (e1000_maybe_stop_tx(netdev, count + 2))
bc7f75fa 4203 return NETDEV_TX_BUSY;
bc7f75fa
AK		 4204
4205 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
4206 tx_flags |= E1000_TX_FLAGS_VLAN;
4207 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
4208 }
4209
4210 first = tx_ring->next_to_use;
4211
4212 tso = e1000_tso(adapter, skb);
4213 if (tso < 0) {
4214 dev_kfree_skb_any(skb);
bc7f75fa
AK		 4215 return NETDEV_TX_OK;
4216 }
4217
4218 if (tso)
4219 tx_flags |= E1000_TX_FLAGS_TSO;
4220 else if (e1000_tx_csum(adapter, skb))
4221 tx_flags |= E1000_TX_FLAGS_CSUM;
4222
ad68076e
BA		 4223 /*
4224 * Old method was to assume IPv4 packet by default if TSO was enabled.
bc7f75fa 4225 * 82571 hardware supports TSO capabilities for IPv6 as well...
ad68076e
BA		 4226 * no longer assume, we must.
4227 */
bc7f75fa
AK		 4228 if (skb->protocol == htons(ETH_P_IP))
4229 tx_flags |= E1000_TX_FLAGS_IPV4;
4230
1b7719c4 4231 /* if count is 0 then mapping error has occured */
bc7f75fa 4232 count = e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss);
1b7719c4
AD		 4233 if (count) {
4234 e1000_tx_queue(adapter, tx_flags, count);
1b7719c4
AD		 4235 /* Make sure there is space in the ring for the next send. */
4236 e1000_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 2);
4237
4238 } else {
bc7f75fa 4239 dev_kfree_skb_any(skb);
1b7719c4
AD		 4240 tx_ring->buffer_info[first].time_stamp = 0;
4241 tx_ring->next_to_use = first;
bc7f75fa
AK		 4242 }
4243
bc7f75fa
AK		 4244 return NETDEV_TX_OK;
4245}
4246
4247/**
4248 * e1000_tx_timeout - Respond to a Tx Hang
4249 * @netdev: network interface device structure
4250 **/
4251static void e1000_tx_timeout(struct net_device *netdev)
4252{
4253 struct e1000_adapter *adapter = netdev_priv(netdev);
4254
4255 /* Do the reset outside of interrupt context */
4256 adapter->tx_timeout_count++;
4257 schedule_work(&adapter->reset_task);
4258}
4259
4260static void e1000_reset_task(struct work_struct *work)
4261{
4262 struct e1000_adapter *adapter;
4263 adapter = container_of(work, struct e1000_adapter, reset_task);
4264
4265 e1000e_reinit_locked(adapter);
4266}
4267
4268/**
4269 * e1000_get_stats - Get System Network Statistics
4270 * @netdev: network interface device structure
4271 *
4272 * Returns the address of the device statistics structure.
4273 * The statistics are actually updated from the timer callback.
4274 **/
4275static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
4276{
bc7f75fa 4277 /* only return the current stats */
7274c20f 4278 return &netdev->stats;
bc7f75fa
AK		 4279}
4280
4281/**
4282 * e1000_change_mtu - Change the Maximum Transfer Unit
4283 * @netdev: network interface device structure
4284 * @new_mtu: new value for maximum frame size
4285 *
4286 * Returns 0 on success, negative on failure
4287 **/
4288static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
4289{
4290 struct e1000_adapter *adapter = netdev_priv(netdev);
4291 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4292
2adc55c9
BA		 4293 /* Jumbo frame support */
4294 if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
4295 !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
4296 e_err("Jumbo Frames not supported.\n");
bc7f75fa
AK		 4297 return -EINVAL;
4298 }
4299
2adc55c9
BA		 4300 /* Supported frame sizes */
4301 if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
4302 (max_frame > adapter->max_hw_frame_size)) {
4303 e_err("Unsupported MTU setting\n");
bc7f75fa
AK		 4304 return -EINVAL;
4305 }
4306
4307 while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
4308 msleep(1);
610c9928 4309 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
318a94d6 4310 adapter->max_frame_size = max_frame;
610c9928
BA		 4311 e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
4312 netdev->mtu = new_mtu;
bc7f75fa
AK		 4313 if (netif_running(netdev))
4314 e1000e_down(adapter);
4315
ad68076e
BA		 4316 /*
4317 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
bc7f75fa
AK		 4318 * means we reserve 2 more, this pushes us to allocate from the next
4319 * larger slab size.
ad68076e 4320 * i.e. RXBUFFER_2048 --> size-4096 slab
97ac8cae
BA		 4321 * However with the new *_jumbo_rx* routines, jumbo receives will use
4322 * fragmented skbs
ad68076e 4323 */
bc7f75fa 4324
9926146b 4325 if (max_frame <= 2048)
bc7f75fa
AK		 4326 adapter->rx_buffer_len = 2048;
4327 else
4328 adapter->rx_buffer_len = 4096;
4329
4330 /* adjust allocation if LPE protects us, and we aren't using SBP */
4331 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
4332 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
4333 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
ad68076e 4334 + ETH_FCS_LEN;
bc7f75fa 4335
bc7f75fa
AK		 4336 if (netif_running(netdev))
4337 e1000e_up(adapter);
4338 else
4339 e1000e_reset(adapter);
4340
4341 clear_bit(__E1000_RESETTING, &adapter->state);
4342
4343 return 0;
4344}
4345
4346static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4347 int cmd)
4348{
4349 struct e1000_adapter *adapter = netdev_priv(netdev);
4350 struct mii_ioctl_data *data = if_mii(ifr);
bc7f75fa 4351
318a94d6 4352 if (adapter->hw.phy.media_type != e1000_media_type_copper)
bc7f75fa
AK		 4353 return -EOPNOTSUPP;
4354
4355 switch (cmd) {
4356 case SIOCGMIIPHY:
4357 data->phy_id = adapter->hw.phy.addr;
4358 break;
4359 case SIOCGMIIREG:
b16a002e
BA		 4360 e1000_phy_read_status(adapter);
4361
7c25769f
BA		 4362 switch (data->reg_num & 0x1F) {
4363 case MII_BMCR:
4364 data->val_out = adapter->phy_regs.bmcr;
4365 break;
4366 case MII_BMSR:
4367 data->val_out = adapter->phy_regs.bmsr;
4368 break;
4369 case MII_PHYSID1:
4370 data->val_out = (adapter->hw.phy.id >> 16);
4371 break;
4372 case MII_PHYSID2:
4373 data->val_out = (adapter->hw.phy.id & 0xFFFF);
4374 break;
4375 case MII_ADVERTISE:
4376 data->val_out = adapter->phy_regs.advertise;
4377 break;
4378 case MII_LPA:
4379 data->val_out = adapter->phy_regs.lpa;
4380 break;
4381 case MII_EXPANSION:
4382 data->val_out = adapter->phy_regs.expansion;
4383 break;
4384 case MII_CTRL1000:
4385 data->val_out = adapter->phy_regs.ctrl1000;
4386 break;
4387 case MII_STAT1000:
4388 data->val_out = adapter->phy_regs.stat1000;
4389 break;
4390 case MII_ESTATUS:
4391 data->val_out = adapter->phy_regs.estatus;
4392 break;
4393 default:
bc7f75fa
AK		 4394 return -EIO;
4395 }
bc7f75fa
AK		 4396 break;
4397 case SIOCSMIIREG:
4398 default:
4399 return -EOPNOTSUPP;
4400 }
4401 return 0;
4402}
4403
4404static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4405{
4406 switch (cmd) {
4407 case SIOCGMIIPHY:
4408 case SIOCGMIIREG:
4409 case SIOCSMIIREG:
4410 return e1000_mii_ioctl(netdev, ifr, cmd);
4411 default:
4412 return -EOPNOTSUPP;
4413 }
4414}
4415
a4f58f54
BA		 4416static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
4417{
4418 struct e1000_hw *hw = &adapter->hw;
4419 u32 i, mac_reg;
4420 u16 phy_reg;
4421 int retval = 0;
4422
4423 /* copy MAC RARs to PHY RARs */
4424 for (i = 0; i < adapter->hw.mac.rar_entry_count; i++) {
4425 mac_reg = er32(RAL(i));
4426 e1e_wphy(hw, BM_RAR_L(i), (u16)(mac_reg & 0xFFFF));
4427 e1e_wphy(hw, BM_RAR_M(i), (u16)((mac_reg >> 16) & 0xFFFF));
4428 mac_reg = er32(RAH(i));
4429 e1e_wphy(hw, BM_RAR_H(i), (u16)(mac_reg & 0xFFFF));
4430 e1e_wphy(hw, BM_RAR_CTRL(i), (u16)((mac_reg >> 16) & 0xFFFF));
4431 }
4432
4433 /* copy MAC MTA to PHY MTA */
4434 for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
4435 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
4436 e1e_wphy(hw, BM_MTA(i), (u16)(mac_reg & 0xFFFF));
4437 e1e_wphy(hw, BM_MTA(i) + 1, (u16)((mac_reg >> 16) & 0xFFFF));
4438 }
4439
4440 /* configure PHY Rx Control register */
4441 e1e_rphy(&adapter->hw, BM_RCTL, &phy_reg);
4442 mac_reg = er32(RCTL);
4443 if (mac_reg & E1000_RCTL_UPE)
4444 phy_reg |= BM_RCTL_UPE;
4445 if (mac_reg & E1000_RCTL_MPE)
4446 phy_reg |= BM_RCTL_MPE;
4447 phy_reg &= ~(BM_RCTL_MO_MASK);
4448 if (mac_reg & E1000_RCTL_MO_3)
4449 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
4450 << BM_RCTL_MO_SHIFT);
4451 if (mac_reg & E1000_RCTL_BAM)
4452 phy_reg |= BM_RCTL_BAM;
4453 if (mac_reg & E1000_RCTL_PMCF)
4454 phy_reg |= BM_RCTL_PMCF;
4455 mac_reg = er32(CTRL);
4456 if (mac_reg & E1000_CTRL_RFCE)
4457 phy_reg |= BM_RCTL_RFCE;
4458 e1e_wphy(&adapter->hw, BM_RCTL, phy_reg);
4459
4460 /* enable PHY wakeup in MAC register */
4461 ew32(WUFC, wufc);
4462 ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
4463
4464 /* configure and enable PHY wakeup in PHY registers */
4465 e1e_wphy(&adapter->hw, BM_WUFC, wufc);
4466 e1e_wphy(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
4467
4468 /* activate PHY wakeup */
94d8186a 4469 retval = hw->phy.ops.acquire(hw);
a4f58f54
BA		 4470 if (retval) {
4471 e_err("Could not acquire PHY\n");
4472 return retval;
4473 }
4474 e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4475 (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT));
4476 retval = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, &phy_reg);
4477 if (retval) {
4478 e_err("Could not read PHY page 769\n");
4479 goto out;
4480 }
4481 phy_reg |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
4482 retval = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
4483 if (retval)
4484 e_err("Could not set PHY Host Wakeup bit\n");
4485out:
94d8186a 4486 hw->phy.ops.release(hw);
a4f58f54
BA		 4487
4488 return retval;
4489}
4490
4f9de721 4491static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
bc7f75fa
AK		 4492{
4493 struct net_device *netdev = pci_get_drvdata(pdev);
4494 struct e1000_adapter *adapter = netdev_priv(netdev);
4495 struct e1000_hw *hw = &adapter->hw;
4496 u32 ctrl, ctrl_ext, rctl, status;
4497 u32 wufc = adapter->wol;
4498 int retval = 0;
4499
4500 netif_device_detach(netdev);
4501
4502 if (netif_running(netdev)) {
4503 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
4504 e1000e_down(adapter);
4505 e1000_free_irq(adapter);
4506 }
4662e82b 4507 e1000e_reset_interrupt_capability(adapter);
bc7f75fa
AK		 4508
4509 retval = pci_save_state(pdev);
4510 if (retval)
4511 return retval;
4512
4513 status = er32(STATUS);
4514 if (status & E1000_STATUS_LU)
4515 wufc &= ~E1000_WUFC_LNKC;
4516
4517 if (wufc) {
4518 e1000_setup_rctl(adapter);
4519 e1000_set_multi(netdev);
4520
4521 /* turn on all-multi mode if wake on multicast is enabled */
4522 if (wufc & E1000_WUFC_MC) {
4523 rctl = er32(RCTL);
4524 rctl |= E1000_RCTL_MPE;
4525 ew32(RCTL, rctl);
4526 }
4527
4528 ctrl = er32(CTRL);
4529 /* advertise wake from D3Cold */
4530 #define E1000_CTRL_ADVD3WUC 0x00100000
4531 /* phy power management enable */
4532 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
a4f58f54
BA		 4533 ctrl |= E1000_CTRL_ADVD3WUC;
4534 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
4535 ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
bc7f75fa
AK		 4536 ew32(CTRL, ctrl);
4537
318a94d6
JK		 4538 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
4539 adapter->hw.phy.media_type ==
4540 e1000_media_type_internal_serdes) {
bc7f75fa
AK		 4541 /* keep the laser running in D3 */
4542 ctrl_ext = er32(CTRL_EXT);
93a23f48 4543 ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
bc7f75fa
AK		 4544 ew32(CTRL_EXT, ctrl_ext);
4545 }
4546
97ac8cae
BA		 4547 if (adapter->flags & FLAG_IS_ICH)
4548 e1000e_disable_gig_wol_ich8lan(&adapter->hw);
4549
bc7f75fa
AK		 4550 /* Allow time for pending master requests to run */
4551 e1000e_disable_pcie_master(&adapter->hw);
4552
82776a4b 4553 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
a4f58f54
BA		 4554 /* enable wakeup by the PHY */
4555 retval = e1000_init_phy_wakeup(adapter, wufc);
4556 if (retval)
4557 return retval;
4558 } else {
4559 /* enable wakeup by the MAC */
4560 ew32(WUFC, wufc);
4561 ew32(WUC, E1000_WUC_PME_EN);
4562 }
bc7f75fa
AK		 4563 } else {
4564 ew32(WUC, 0);
4565 ew32(WUFC, 0);
bc7f75fa
AK		 4566 }
4567
4f9de721
RW		 4568 *enable_wake = !!wufc;
4569
bc7f75fa 4570 /* make sure adapter isn't asleep if manageability is enabled */
82776a4b
BA		 4571 if ((adapter->flags & FLAG_MNG_PT_ENABLED) ||
4572 (hw->mac.ops.check_mng_mode(hw)))
4f9de721 4573 *enable_wake = true;
bc7f75fa
AK		 4574
4575 if (adapter->hw.phy.type == e1000_phy_igp_3)
4576 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
4577
ad68076e
BA		 4578 /*
4579 * Release control of h/w to f/w. If f/w is AMT enabled, this
4580 * would have already happened in close and is redundant.
4581 */
bc7f75fa
AK		 4582 e1000_release_hw_control(adapter);
4583
4584 pci_disable_device(pdev);
4585
4f9de721
RW		 4586 return 0;
4587}
4588
4589static void e1000_power_off(struct pci_dev *pdev, bool sleep, bool wake)
4590{
4591 if (sleep && wake) {
4592 pci_prepare_to_sleep(pdev);
4593 return;
4594 }
4595
4596 pci_wake_from_d3(pdev, wake);
4597 pci_set_power_state(pdev, PCI_D3hot);
4598}
4599
4600static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
4601 bool wake)
4602{
4603 struct net_device *netdev = pci_get_drvdata(pdev);
4604 struct e1000_adapter *adapter = netdev_priv(netdev);
4605
005cbdfc
AD		 4606 /*
4607 * The pci-e switch on some quad port adapters will report a
4608 * correctable error when the MAC transitions from D0 to D3. To
4609 * prevent this we need to mask off the correctable errors on the
4610 * downstream port of the pci-e switch.
4611 */
4612 if (adapter->flags & FLAG_IS_QUAD_PORT) {
4613 struct pci_dev *us_dev = pdev->bus->self;
4614 int pos = pci_find_capability(us_dev, PCI_CAP_ID_EXP);
4615 u16 devctl;
4616
4617 pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
4618 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
4619 (devctl & ~PCI_EXP_DEVCTL_CERE));
4620
4f9de721 4621 e1000_power_off(pdev, sleep, wake);
005cbdfc
AD		 4622
4623 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
4624 } else {
4f9de721 4625 e1000_power_off(pdev, sleep, wake);
005cbdfc 4626 }
bc7f75fa
AK		 4627}
4628
1eae4eb2
AK		 4629static void e1000e_disable_l1aspm(struct pci_dev *pdev)
4630{
4631 int pos;
1eae4eb2
AK		 4632 u16 val;
4633
4634 /*
4635 * 82573 workaround - disable L1 ASPM on mobile chipsets
4636 *
4637 * L1 ASPM on various mobile (ich7) chipsets do not behave properly
4638 * resulting in lost data or garbage information on the pci-e link
4639 * level. This could result in (false) bad EEPROM checksum errors,
4640 * long ping times (up to 2s) or even a system freeze/hang.
4641 *
4642 * Unfortunately this feature saves about 1W power consumption when
4643 * active.
4644 */
4645 pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
1eae4eb2
AK		 4646 pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &val);
4647 if (val & 0x2) {
4648 dev_warn(&pdev->dev, "Disabling L1 ASPM\n");
4649 val &= ~0x2;
4650 pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, val);
4651 }
4652}
4653
bc7f75fa 4654#ifdef CONFIG_PM
4f9de721
RW		 4655static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4656{
4657 int retval;
4658 bool wake;
4659
4660 retval = __e1000_shutdown(pdev, &wake);
4661 if (!retval)
4662 e1000_complete_shutdown(pdev, true, wake);
4663
4664 return retval;
4665}
4666
bc7f75fa
AK		 4667static int e1000_resume(struct pci_dev *pdev)
4668{
4669 struct net_device *netdev = pci_get_drvdata(pdev);
4670 struct e1000_adapter *adapter = netdev_priv(netdev);
4671 struct e1000_hw *hw = &adapter->hw;
4672 u32 err;
4673
4674 pci_set_power_state(pdev, PCI_D0);
4675 pci_restore_state(pdev);
28b8f04a 4676 pci_save_state(pdev);
1eae4eb2 4677 e1000e_disable_l1aspm(pdev);
6e4f6f6b 4678
f0f422e5 4679 err = pci_enable_device_mem(pdev);
bc7f75fa
AK		 4680 if (err) {
4681 dev_err(&pdev->dev,
4682 "Cannot enable PCI device from suspend\n");
4683 return err;
4684 }
4685
4686 pci_set_master(pdev);
4687
4688 pci_enable_wake(pdev, PCI_D3hot, 0);
4689 pci_enable_wake(pdev, PCI_D3cold, 0);
4690
4662e82b 4691 e1000e_set_interrupt_capability(adapter);
bc7f75fa
AK		 4692 if (netif_running(netdev)) {
4693 err = e1000_request_irq(adapter);
4694 if (err)
4695 return err;
4696 }
4697
4698 e1000e_power_up_phy(adapter);
a4f58f54
BA		 4699
4700 /* report the system wakeup cause from S3/S4 */
4701 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
4702 u16 phy_data;
4703
4704 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
4705 if (phy_data) {
4706 e_info("PHY Wakeup cause - %s\n",
4707 phy_data & E1000_WUS_EX ? "Unicast Packet" :
4708 phy_data & E1000_WUS_MC ? "Multicast Packet" :
4709 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
4710 phy_data & E1000_WUS_MAG ? "Magic Packet" :
4711 phy_data & E1000_WUS_LNKC ? "Link Status "
4712 " Change" : "other");
4713 }
4714 e1e_wphy(&adapter->hw, BM_WUS, ~0);
4715 } else {
4716 u32 wus = er32(WUS);
4717 if (wus) {
4718 e_info("MAC Wakeup cause - %s\n",
4719 wus & E1000_WUS_EX ? "Unicast Packet" :
4720 wus & E1000_WUS_MC ? "Multicast Packet" :
4721 wus & E1000_WUS_BC ? "Broadcast Packet" :
4722 wus & E1000_WUS_MAG ? "Magic Packet" :
4723 wus & E1000_WUS_LNKC ? "Link Status Change" :
4724 "other");
4725 }
4726 ew32(WUS, ~0);
4727 }
4728
bc7f75fa 4729 e1000e_reset(adapter);
bc7f75fa
AK		 4730
4731 e1000_init_manageability(adapter);
4732
4733 if (netif_running(netdev))
4734 e1000e_up(adapter);
4735
4736 netif_device_attach(netdev);
4737
ad68076e
BA		 4738 /*
4739 * If the controller has AMT, do not set DRV_LOAD until the interface
bc7f75fa 4740 * is up. For all other cases, let the f/w know that the h/w is now
ad68076e
BA		 4741 * under the control of the driver.
4742 */
c43bc57e 4743 if (!(adapter->flags & FLAG_HAS_AMT))
bc7f75fa
AK		 4744 e1000_get_hw_control(adapter);
4745
4746 return 0;
4747}
4748#endif
4749
4750static void e1000_shutdown(struct pci_dev *pdev)
4751{
4f9de721
RW		 4752 bool wake = false;
4753
4754 __e1000_shutdown(pdev, &wake);
4755
4756 if (system_state == SYSTEM_POWER_OFF)
4757 e1000_complete_shutdown(pdev, false, wake);
bc7f75fa
AK		 4758}
4759
4760#ifdef CONFIG_NET_POLL_CONTROLLER
4761/*
4762 * Polling 'interrupt' - used by things like netconsole to send skbs
4763 * without having to re-enable interrupts. It's not called while
4764 * the interrupt routine is executing.
4765 */
4766static void e1000_netpoll(struct net_device *netdev)
4767{
4768 struct e1000_adapter *adapter = netdev_priv(netdev);
4769
4770 disable_irq(adapter->pdev->irq);
4771 e1000_intr(adapter->pdev->irq, netdev);
4772
bc7f75fa
AK		 4773 enable_irq(adapter->pdev->irq);
4774}
4775#endif
4776
4777/**
4778 * e1000_io_error_detected - called when PCI error is detected
4779 * @pdev: Pointer to PCI device
4780 * @state: The current pci connection state
4781 *
4782 * This function is called after a PCI bus error affecting
4783 * this device has been detected.
4784 */
4785static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4786 pci_channel_state_t state)
4787{
4788 struct net_device *netdev = pci_get_drvdata(pdev);
4789 struct e1000_adapter *adapter = netdev_priv(netdev);
4790
4791 netif_device_detach(netdev);
4792
c93b5a76
MM		 4793 if (state == pci_channel_io_perm_failure)
4794 return PCI_ERS_RESULT_DISCONNECT;
4795
bc7f75fa
AK		 4796 if (netif_running(netdev))
4797 e1000e_down(adapter);
4798 pci_disable_device(pdev);
4799
4800 /* Request a slot slot reset. */
4801 return PCI_ERS_RESULT_NEED_RESET;
4802}
4803
4804/**
4805 * e1000_io_slot_reset - called after the pci bus has been reset.
4806 * @pdev: Pointer to PCI device
4807 *
4808 * Restart the card from scratch, as if from a cold-boot. Implementation
4809 * resembles the first-half of the e1000_resume routine.
4810 */
4811static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4812{
4813 struct net_device *netdev = pci_get_drvdata(pdev);
4814 struct e1000_adapter *adapter = netdev_priv(netdev);
4815 struct e1000_hw *hw = &adapter->hw;
6e4f6f6b 4816 int err;
111b9dc5 4817 pci_ers_result_t result;
bc7f75fa 4818
1eae4eb2 4819 e1000e_disable_l1aspm(pdev);
f0f422e5 4820 err = pci_enable_device_mem(pdev);
6e4f6f6b 4821 if (err) {
bc7f75fa
AK		 4822 dev_err(&pdev->dev,
4823 "Cannot re-enable PCI device after reset.\n");
111b9dc5
JB		 4824 result = PCI_ERS_RESULT_DISCONNECT;
4825 } else {
4826 pci_set_master(pdev);
4827 pci_restore_state(pdev);
28b8f04a 4828 pci_save_state(pdev);
bc7f75fa 4829
111b9dc5
JB		 4830 pci_enable_wake(pdev, PCI_D3hot, 0);
4831 pci_enable_wake(pdev, PCI_D3cold, 0);
bc7f75fa 4832
111b9dc5
JB		 4833 e1000e_reset(adapter);
4834 ew32(WUS, ~0);
4835 result = PCI_ERS_RESULT_RECOVERED;
4836 }
bc7f75fa 4837
111b9dc5
JB		 4838 pci_cleanup_aer_uncorrect_error_status(pdev);
4839
4840 return result;
bc7f75fa
AK		 4841}
4842
4843/**
4844 * e1000_io_resume - called when traffic can start flowing again.
4845 * @pdev: Pointer to PCI device
4846 *
4847 * This callback is called when the error recovery driver tells us that
4848 * its OK to resume normal operation. Implementation resembles the
4849 * second-half of the e1000_resume routine.
4850 */
4851static void e1000_io_resume(struct pci_dev *pdev)
4852{
4853 struct net_device *netdev = pci_get_drvdata(pdev);
4854 struct e1000_adapter *adapter = netdev_priv(netdev);
4855
4856 e1000_init_manageability(adapter);
4857
4858 if (netif_running(netdev)) {
4859 if (e1000e_up(adapter)) {
4860 dev_err(&pdev->dev,
4861 "can't bring device back up after reset\n");
4862 return;
4863 }
4864 }
4865
4866 netif_device_attach(netdev);
4867
ad68076e
BA		 4868 /*
4869 * If the controller has AMT, do not set DRV_LOAD until the interface
bc7f75fa 4870 * is up. For all other cases, let the f/w know that the h/w is now
ad68076e
BA		 4871 * under the control of the driver.
4872 */
c43bc57e 4873 if (!(adapter->flags & FLAG_HAS_AMT))
bc7f75fa
AK		 4874 e1000_get_hw_control(adapter);
4875
4876}
4877
4878static void e1000_print_device_info(struct e1000_adapter *adapter)
4879{
4880 struct e1000_hw *hw = &adapter->hw;
4881 struct net_device *netdev = adapter->netdev;
69e3fd8c 4882 u32 pba_num;
bc7f75fa
AK		 4883
4884 /* print bus type/speed/width info */
7c510e4b 4885 e_info("(PCI Express:2.5GB/s:%s) %pM\n",
44defeb3
JK		 4886 /* bus width */
4887 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
4888 "Width x1"),
4889 /* MAC address */
7c510e4b 4890 netdev->dev_addr);
44defeb3
JK		 4891 e_info("Intel(R) PRO/%s Network Connection\n",
4892 (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
69e3fd8c 4893 e1000e_read_pba_num(hw, &pba_num);
44defeb3
JK		 4894 e_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
4895 hw->mac.type, hw->phy.type, (pba_num >> 8), (pba_num & 0xff));
bc7f75fa
AK		 4896}
4897
10aa4c04
AK		 4898static void e1000_eeprom_checks(struct e1000_adapter *adapter)
4899{
4900 struct e1000_hw *hw = &adapter->hw;
4901 int ret_val;
4902 u16 buf = 0;
4903
4904 if (hw->mac.type != e1000_82573)
4905 return;
4906
4907 ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
e243455d 4908 if (!ret_val && (!(le16_to_cpu(buf) & (1 << 0)))) {
10aa4c04 4909 /* Deep Smart Power Down (DSPD) */
6c2a9efa
FP		 4910 dev_warn(&adapter->pdev->dev,
4911 "Warning: detected DSPD enabled in EEPROM\n");
10aa4c04
AK		 4912 }
4913
4914 ret_val = e1000_read_nvm(hw, NVM_INIT_3GIO_3, 1, &buf);
e243455d 4915 if (!ret_val && (le16_to_cpu(buf) & (3 << 2))) {
10aa4c04 4916 /* ASPM enable */
6c2a9efa
FP		 4917 dev_warn(&adapter->pdev->dev,
4918 "Warning: detected ASPM enabled in EEPROM\n");
10aa4c04
AK		 4919 }
4920}
4921
651c2466
SH		 4922static const struct net_device_ops e1000e_netdev_ops = {
4923 .ndo_open = e1000_open,
4924 .ndo_stop = e1000_close,
00829823 4925 .ndo_start_xmit = e1000_xmit_frame,
651c2466
SH		 4926 .ndo_get_stats = e1000_get_stats,
4927 .ndo_set_multicast_list = e1000_set_multi,
4928 .ndo_set_mac_address = e1000_set_mac,
4929 .ndo_change_mtu = e1000_change_mtu,
4930 .ndo_do_ioctl = e1000_ioctl,
4931 .ndo_tx_timeout = e1000_tx_timeout,
4932 .ndo_validate_addr = eth_validate_addr,
4933
4934 .ndo_vlan_rx_register = e1000_vlan_rx_register,
4935 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
4936 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
4937#ifdef CONFIG_NET_POLL_CONTROLLER
4938 .ndo_poll_controller = e1000_netpoll,
4939#endif
4940};
4941
bc7f75fa
AK		 4942/**
4943 * e1000_probe - Device Initialization Routine
4944 * @pdev: PCI device information struct
4945 * @ent: entry in e1000_pci_tbl
4946 *
4947 * Returns 0 on success, negative on failure
4948 *
4949 * e1000_probe initializes an adapter identified by a pci_dev structure.
4950 * The OS initialization, configuring of the adapter private structure,
4951 * and a hardware reset occur.
4952 **/
4953static int __devinit e1000_probe(struct pci_dev *pdev,
4954 const struct pci_device_id *ent)
4955{
4956 struct net_device *netdev;
4957 struct e1000_adapter *adapter;
4958 struct e1000_hw *hw;
4959 const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
f47e81fc
BB		 4960 resource_size_t mmio_start, mmio_len;
4961 resource_size_t flash_start, flash_len;
bc7f75fa
AK		 4962
4963 static int cards_found;
4964 int i, err, pci_using_dac;
4965 u16 eeprom_data = 0;
4966 u16 eeprom_apme_mask = E1000_EEPROM_APME;
4967
1eae4eb2 4968 e1000e_disable_l1aspm(pdev);
6e4f6f6b 4969
f0f422e5 4970 err = pci_enable_device_mem(pdev);
bc7f75fa
AK		 4971 if (err)
4972 return err;
4973
4974 pci_using_dac = 0;
6a35528a 4975 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
bc7f75fa 4976 if (!err) {
6a35528a 4977 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
bc7f75fa
AK		 4978 if (!err)
4979 pci_using_dac = 1;
4980 } else {
284901a9 4981 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
bc7f75fa
AK		 4982 if (err) {
4983 err = pci_set_consistent_dma_mask(pdev,
284901a9 4984 DMA_BIT_MASK(32));
bc7f75fa
AK		 4985 if (err) {
4986 dev_err(&pdev->dev, "No usable DMA "
4987 "configuration, aborting\n");
4988 goto err_dma;
4989 }
4990 }
4991 }
4992
e8de1481 4993 err = pci_request_selected_regions_exclusive(pdev,
f0f422e5
BA		 4994 pci_select_bars(pdev, IORESOURCE_MEM),
4995 e1000e_driver_name);
bc7f75fa
AK		 4996 if (err)
4997 goto err_pci_reg;
4998
68eac460 4999 /* AER (Advanced Error Reporting) hooks */
19d5afd4 5000 pci_enable_pcie_error_reporting(pdev);
68eac460 5001
bc7f75fa 5002 pci_set_master(pdev);
438b365a
BA		 5003 /* PCI config space info */
5004 err = pci_save_state(pdev);
5005 if (err)
5006 goto err_alloc_etherdev;
bc7f75fa
AK		 5007
5008 err = -ENOMEM;
5009 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
5010 if (!netdev)
5011 goto err_alloc_etherdev;
5012
bc7f75fa
AK		 5013 SET_NETDEV_DEV(netdev, &pdev->dev);
5014
5015 pci_set_drvdata(pdev, netdev);
5016 adapter = netdev_priv(netdev);
5017 hw = &adapter->hw;
5018 adapter->netdev = netdev;
5019 adapter->pdev = pdev;
5020 adapter->ei = ei;
5021 adapter->pba = ei->pba;
5022 adapter->flags = ei->flags;
eb7c3adb 5023 adapter->flags2 = ei->flags2;
bc7f75fa
AK		 5024 adapter->hw.adapter = adapter;
5025 adapter->hw.mac.type = ei->mac;
2adc55c9 5026 adapter->max_hw_frame_size = ei->max_hw_frame_size;
bc7f75fa
AK		 5027 adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
5028
5029 mmio_start = pci_resource_start(pdev, 0);
5030 mmio_len = pci_resource_len(pdev, 0);
5031
5032 err = -EIO;
5033 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
5034 if (!adapter->hw.hw_addr)
5035 goto err_ioremap;
5036
5037 if ((adapter->flags & FLAG_HAS_FLASH) &&
5038 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
5039 flash_start = pci_resource_start(pdev, 1);
5040 flash_len = pci_resource_len(pdev, 1);
5041 adapter->hw.flash_address = ioremap(flash_start, flash_len);
5042 if (!adapter->hw.flash_address)
5043 goto err_flashmap;
5044 }
5045
5046 /* construct the net_device struct */
651c2466 5047 netdev->netdev_ops = &e1000e_netdev_ops;
bc7f75fa 5048 e1000e_set_ethtool_ops(netdev);
bc7f75fa
AK		 5049 netdev->watchdog_timeo = 5 * HZ;
5050 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
bc7f75fa
AK		 5051 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
5052
5053 netdev->mem_start = mmio_start;
5054 netdev->mem_end = mmio_start + mmio_len;
5055
5056 adapter->bd_number = cards_found++;
5057
4662e82b
BA		 5058 e1000e_check_options(adapter);
5059
bc7f75fa
AK		 5060 /* setup adapter struct */
5061 err = e1000_sw_init(adapter);
5062 if (err)
5063 goto err_sw_init;
5064
5065 err = -EIO;
5066
5067 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
5068 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
5069 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
5070
69e3fd8c 5071 err = ei->get_variants(adapter);
bc7f75fa
AK		 5072 if (err)
5073 goto err_hw_init;
5074
4a770358
BA		 5075 if ((adapter->flags & FLAG_IS_ICH) &&
5076 (adapter->flags & FLAG_READ_ONLY_NVM))
5077 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
5078
bc7f75fa
AK		 5079 hw->mac.ops.get_bus_info(&adapter->hw);
5080
318a94d6 5081 adapter->hw.phy.autoneg_wait_to_complete = 0;
bc7f75fa
AK		 5082
5083 /* Copper options */
318a94d6 5084 if (adapter->hw.phy.media_type == e1000_media_type_copper) {
bc7f75fa
AK		 5085 adapter->hw.phy.mdix = AUTO_ALL_MODES;
5086 adapter->hw.phy.disable_polarity_correction = 0;
5087 adapter->hw.phy.ms_type = e1000_ms_hw_default;
5088 }
5089
5090 if (e1000_check_reset_block(&adapter->hw))
44defeb3 5091 e_info("PHY reset is blocked due to SOL/IDER session.\n");
bc7f75fa
AK		 5092
5093 netdev->features = NETIF_F_SG |
5094 NETIF_F_HW_CSUM |
5095 NETIF_F_HW_VLAN_TX |
5096 NETIF_F_HW_VLAN_RX;
5097
5098 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
5099 netdev->features |= NETIF_F_HW_VLAN_FILTER;
5100
5101 netdev->features |= NETIF_F_TSO;
5102 netdev->features |= NETIF_F_TSO6;
5103
a5136e23
JK		 5104 netdev->vlan_features |= NETIF_F_TSO;
5105 netdev->vlan_features |= NETIF_F_TSO6;
5106 netdev->vlan_features |= NETIF_F_HW_CSUM;
5107 netdev->vlan_features |= NETIF_F_SG;
5108
bc7f75fa
AK		 5109 if (pci_using_dac)
5110 netdev->features |= NETIF_F_HIGHDMA;
5111
bc7f75fa
AK		 5112 if (e1000e_enable_mng_pass_thru(&adapter->hw))
5113 adapter->flags |= FLAG_MNG_PT_ENABLED;
5114
ad68076e
BA		 5115 /*
5116 * before reading the NVM, reset the controller to
5117 * put the device in a known good starting state
5118 */
bc7f75fa
AK		 5119 adapter->hw.mac.ops.reset_hw(&adapter->hw);
5120
5121 /*
5122 * systems with ASPM and others may see the checksum fail on the first
5123 * attempt. Let's give it a few tries
5124 */
5125 for (i = 0;; i++) {
5126 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
5127 break;
5128 if (i == 2) {
44defeb3 5129 e_err("The NVM Checksum Is Not Valid\n");
bc7f75fa
AK		 5130 err = -EIO;
5131 goto err_eeprom;
5132 }
5133 }
5134
10aa4c04
AK		 5135 e1000_eeprom_checks(adapter);
5136
bc7f75fa
AK		 5137 /* copy the MAC address out of the NVM */
5138 if (e1000e_read_mac_addr(&adapter->hw))
44defeb3 5139 e_err("NVM Read Error while reading MAC address\n");
bc7f75fa
AK		 5140
5141 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
5142 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
5143
5144 if (!is_valid_ether_addr(netdev->perm_addr)) {
7c510e4b 5145 e_err("Invalid MAC Address: %pM\n", netdev->perm_addr);
bc7f75fa
AK		 5146 err = -EIO;
5147 goto err_eeprom;
5148 }
5149
5150 init_timer(&adapter->watchdog_timer);
5151 adapter->watchdog_timer.function = &e1000_watchdog;
5152 adapter->watchdog_timer.data = (unsigned long) adapter;
5153
5154 init_timer(&adapter->phy_info_timer);
5155 adapter->phy_info_timer.function = &e1000_update_phy_info;
5156 adapter->phy_info_timer.data = (unsigned long) adapter;
5157
5158 INIT_WORK(&adapter->reset_task, e1000_reset_task);
5159 INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
a8f88ff5
JB		 5160 INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
5161 INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
41cec6f1 5162 INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
bc7f75fa 5163
bc7f75fa
AK		 5164 /* Initialize link parameters. User can change them with ethtool */
5165 adapter->hw.mac.autoneg = 1;
309af40b 5166 adapter->fc_autoneg = 1;
5c48ef3e
BA		 5167 adapter->hw.fc.requested_mode = e1000_fc_default;
5168 adapter->hw.fc.current_mode = e1000_fc_default;
bc7f75fa
AK		 5169 adapter->hw.phy.autoneg_advertised = 0x2f;
5170
5171 /* ring size defaults */
5172 adapter->rx_ring->count = 256;
5173 adapter->tx_ring->count = 256;
5174
5175 /*
5176 * Initial Wake on LAN setting - If APM wake is enabled in
5177 * the EEPROM, enable the ACPI Magic Packet filter
5178 */
5179 if (adapter->flags & FLAG_APME_IN_WUC) {
5180 /* APME bit in EEPROM is mapped to WUC.APME */
5181 eeprom_data = er32(WUC);
5182 eeprom_apme_mask = E1000_WUC_APME;
a4f58f54
BA		 5183 if (eeprom_data & E1000_WUC_PHY_WAKE)
5184 adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
bc7f75fa
AK		 5185 } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
5186 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
5187 (adapter->hw.bus.func == 1))
5188 e1000_read_nvm(&adapter->hw,
5189 NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
5190 else
5191 e1000_read_nvm(&adapter->hw,
5192 NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
5193 }
5194
5195 /* fetch WoL from EEPROM */
5196 if (eeprom_data & eeprom_apme_mask)
5197 adapter->eeprom_wol |= E1000_WUFC_MAG;
5198
5199 /*
5200 * now that we have the eeprom settings, apply the special cases
5201 * where the eeprom may be wrong or the board simply won't support
5202 * wake on lan on a particular port
5203 */
5204 if (!(adapter->flags & FLAG_HAS_WOL))
5205 adapter->eeprom_wol = 0;
5206
5207 /* initialize the wol settings based on the eeprom settings */
5208 adapter->wol = adapter->eeprom_wol;
6ff68026 5209 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
bc7f75fa 5210
84527590
BA		 5211 /* save off EEPROM version number */
5212 e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
5213
bc7f75fa
AK		 5214 /* reset the hardware with the new settings */
5215 e1000e_reset(adapter);
5216
ad68076e
BA		 5217 /*
5218 * If the controller has AMT, do not set DRV_LOAD until the interface
bc7f75fa 5219 * is up. For all other cases, let the f/w know that the h/w is now
ad68076e
BA		 5220 * under the control of the driver.
5221 */
c43bc57e 5222 if (!(adapter->flags & FLAG_HAS_AMT))
bc7f75fa
AK		 5223 e1000_get_hw_control(adapter);
5224
bc7f75fa
AK		 5225 strcpy(netdev->name, "eth%d");
5226 err = register_netdev(netdev);
5227 if (err)
5228 goto err_register;
5229
9c563d20
JB		 5230 /* carrier off reporting is important to ethtool even BEFORE open */
5231 netif_carrier_off(netdev);
5232
bc7f75fa
AK		 5233 e1000_print_device_info(adapter);
5234
5235 return 0;
5236
5237err_register:
c43bc57e
JB		 5238 if (!(adapter->flags & FLAG_HAS_AMT))
5239 e1000_release_hw_control(adapter);
bc7f75fa
AK		 5240err_eeprom:
5241 if (!e1000_check_reset_block(&adapter->hw))
5242 e1000_phy_hw_reset(&adapter->hw);
c43bc57e 5243err_hw_init:
bc7f75fa 5244
bc7f75fa
AK		 5245 kfree(adapter->tx_ring);
5246 kfree(adapter->rx_ring);
5247err_sw_init:
c43bc57e
JB		 5248 if (adapter->hw.flash_address)
5249 iounmap(adapter->hw.flash_address);
e82f54ba 5250 e1000e_reset_interrupt_capability(adapter);
c43bc57e 5251err_flashmap:
bc7f75fa
AK		 5252 iounmap(adapter->hw.hw_addr);
5253err_ioremap:
5254 free_netdev(netdev);
5255err_alloc_etherdev:
f0f422e5
BA		 5256 pci_release_selected_regions(pdev,
5257 pci_select_bars(pdev, IORESOURCE_MEM));
bc7f75fa
AK		 5258err_pci_reg:
5259err_dma:
5260 pci_disable_device(pdev);
5261 return err;
5262}
5263
5264/**
5265 * e1000_remove - Device Removal Routine
5266 * @pdev: PCI device information struct
5267 *
5268 * e1000_remove is called by the PCI subsystem to alert the driver
5269 * that it should release a PCI device. The could be caused by a
5270 * Hot-Plug event, or because the driver is going to be removed from
5271 * memory.
5272 **/
5273static void __devexit e1000_remove(struct pci_dev *pdev)
5274{
5275 struct net_device *netdev = pci_get_drvdata(pdev);
5276 struct e1000_adapter *adapter = netdev_priv(netdev);
5277
ad68076e
BA		 5278 /*
5279 * flush_scheduled work may reschedule our watchdog task, so
5280 * explicitly disable watchdog tasks from being rescheduled
5281 */
bc7f75fa
AK		 5282 set_bit(__E1000_DOWN, &adapter->state);
5283 del_timer_sync(&adapter->watchdog_timer);
5284 del_timer_sync(&adapter->phy_info_timer);
5285
41cec6f1
BA		 5286 cancel_work_sync(&adapter->reset_task);
5287 cancel_work_sync(&adapter->watchdog_task);
5288 cancel_work_sync(&adapter->downshift_task);
5289 cancel_work_sync(&adapter->update_phy_task);
5290 cancel_work_sync(&adapter->print_hang_task);
bc7f75fa
AK		 5291 flush_scheduled_work();
5292
17f208de
BA		 5293 if (!(netdev->flags & IFF_UP))
5294 e1000_power_down_phy(adapter);
5295
5296 unregister_netdev(netdev);
5297
ad68076e
BA		 5298 /*
5299 * Release control of h/w to f/w. If f/w is AMT enabled, this
5300 * would have already happened in close and is redundant.
5301 */
bc7f75fa
AK		 5302 e1000_release_hw_control(adapter);
5303
4662e82b 5304 e1000e_reset_interrupt_capability(adapter);
bc7f75fa
AK		 5305 kfree(adapter->tx_ring);
5306 kfree(adapter->rx_ring);
5307
5308 iounmap(adapter->hw.hw_addr);
5309 if (adapter->hw.flash_address)
5310 iounmap(adapter->hw.flash_address);
f0f422e5
BA		 5311 pci_release_selected_regions(pdev,
5312 pci_select_bars(pdev, IORESOURCE_MEM));
bc7f75fa
AK		 5313
5314 free_netdev(netdev);
5315
111b9dc5 5316 /* AER disable */
19d5afd4 5317 pci_disable_pcie_error_reporting(pdev);
111b9dc5 5318
bc7f75fa
AK		 5319 pci_disable_device(pdev);
5320}
5321
5322/* PCI Error Recovery (ERS) */
5323static struct pci_error_handlers e1000_err_handler = {
5324 .error_detected = e1000_io_error_detected,
5325 .slot_reset = e1000_io_slot_reset,
5326 .resume = e1000_io_resume,
5327};
5328
5329static struct pci_device_id e1000_pci_tbl[] = {
bc7f75fa
AK		 5330 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
5331 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
5332 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
5333 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
5334 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
5335 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
040babf9
AK		 5336 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
5337 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
5338 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
ad68076e 5339
bc7f75fa
AK		 5340 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
5341 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
5342 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
5343 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
ad68076e 5344
bc7f75fa
AK		 5345 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
5346 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
5347 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
ad68076e 5348
4662e82b 5349 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
bef28b11 5350 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
8c81c9c3 5351 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
4662e82b 5352
bc7f75fa
AK		 5353 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
5354 board_80003es2lan },
5355 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
5356 board_80003es2lan },
5357 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
5358 board_80003es2lan },
5359 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
5360 board_80003es2lan },
ad68076e 5361
bc7f75fa
AK		 5362 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
5363 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
5364 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
5365 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
5366 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
5367 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
5368 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
9e135a2e 5369 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
ad68076e 5370
bc7f75fa
AK		 5371 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
5372 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
5373 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
5374 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
5375 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
2f15f9d6 5376 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
97ac8cae
BA		 5377 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
5378 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
5379 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
5380
5381 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
5382 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
5383 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
bc7f75fa 5384
f4187b56
BA		 5385 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
5386 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
5387
a4f58f54
BA		 5388 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
5389 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
5390 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
5391 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
5392
bc7f75fa
AK		 5393 { } /* terminate list */
5394};
5395MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
5396
5397/* PCI Device API Driver */
5398static struct pci_driver e1000_driver = {
5399 .name = e1000e_driver_name,
5400 .id_table = e1000_pci_tbl,
5401 .probe = e1000_probe,
5402 .remove = __devexit_p(e1000_remove),
5403#ifdef CONFIG_PM
ad68076e 5404 /* Power Management Hooks */
bc7f75fa
AK		 5405 .suspend = e1000_suspend,
5406 .resume = e1000_resume,
5407#endif
5408 .shutdown = e1000_shutdown,
5409 .err_handler = &e1000_err_handler
5410};
5411
5412/**
5413 * e1000_init_module - Driver Registration Routine
5414 *
5415 * e1000_init_module is the first routine called when the driver is
5416 * loaded. All it does is register with the PCI subsystem.
5417 **/
5418static int __init e1000_init_module(void)
5419{
5420 int ret;
5421 printk(KERN_INFO "%s: Intel(R) PRO/1000 Network Driver - %s\n",
5422 e1000e_driver_name, e1000e_driver_version);
c7e54b1b 5423 printk(KERN_INFO "%s: Copyright (c) 1999 - 2009 Intel Corporation.\n",
bc7f75fa
AK		 5424 e1000e_driver_name);
5425 ret = pci_register_driver(&e1000_driver);
53ec5498 5426
bc7f75fa
AK		 5427 return ret;
5428}
5429module_init(e1000_init_module);
5430
5431/**
5432 * e1000_exit_module - Driver Exit Cleanup Routine
5433 *
5434 * e1000_exit_module is called just before the driver is removed
5435 * from memory.
5436 **/
5437static void __exit e1000_exit_module(void)
5438{
5439 pci_unregister_driver(&e1000_driver);
5440}
5441module_exit(e1000_exit_module);
5442
5443
5444MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
5445MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
5446MODULE_LICENSE("GPL");
5447MODULE_VERSION(DRV_VERSION);
5448
5449/* e1000_main.c */
Clone of davem's net-next-2.6 tree