?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Add linux-next specific files for 20110831
[linux-2.6/next.git] / drivers / net / ethernet / intel / igbvf / netdev.c
blobb3d760b08a5fae98b869fdca5a5d7276db592300
1 /*******************************************************************************
2
3 Intel(R) 82576 Virtual Function Linux driver
4 Copyright(c) 2009 - 2010 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/init.h>
31 #include <linux/pci.h>
32 #include <linux/vmalloc.h>
33 #include <linux/pagemap.h>
34 #include <linux/delay.h>
35 #include <linux/netdevice.h>
36 #include <linux/tcp.h>
37 #include <linux/ipv6.h>
38 #include <linux/slab.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/prefetch.h>
45
46 #include "igbvf.h"
47
48 #define DRV_VERSION "2.0.0-k"
49 char igbvf_driver_name[] = "igbvf";
50 const char igbvf_driver_version[] = DRV_VERSION;
51 static const char igbvf_driver_string[] =
52 "Intel(R) Virtual Function Network Driver";
53 static const char igbvf_copyright[] =
54 "Copyright (c) 2009 - 2010 Intel Corporation.";
55
56 static int igbvf_poll(struct napi_struct *napi, int budget);
57 static void igbvf_reset(struct igbvf_adapter *);
58 static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
59 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
60
61 static struct igbvf_info igbvf_vf_info = {
62 .mac = e1000_vfadapt,
63 .flags = 0,
64 .pba = 10,
65 .init_ops = e1000_init_function_pointers_vf,
66 };
67
68 static struct igbvf_info igbvf_i350_vf_info = {
69 .mac = e1000_vfadapt_i350,
70 .flags = 0,
71 .pba = 10,
72 .init_ops = e1000_init_function_pointers_vf,
73 };
74
75 static const struct igbvf_info *igbvf_info_tbl[] = {
76 [board_vf] = &igbvf_vf_info,
77 [board_i350_vf] = &igbvf_i350_vf_info,
78 };
79
80 /**
81 * igbvf_desc_unused - calculate if we have unused descriptors
82 **/
83 static int igbvf_desc_unused(struct igbvf_ring *ring)
84 {
85 if (ring->next_to_clean > ring->next_to_use)
86 return ring->next_to_clean - ring->next_to_use - 1;
87
88 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
89 }
90
91 /**
92 * igbvf_receive_skb - helper function to handle Rx indications
93 * @adapter: board private structure
94 * @status: descriptor status field as written by hardware
95 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
96 * @skb: pointer to sk_buff to be indicated to stack
97 **/
98 static void igbvf_receive_skb(struct igbvf_adapter *adapter,
99 struct net_device *netdev,
100 struct sk_buff *skb,
101 u32 status, u16 vlan)
102 {
103 if (status & E1000_RXD_STAT_VP) {
104 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
105
106 __vlan_hwaccel_put_tag(skb, vid);
107 }
108 netif_receive_skb(skb);
109 }
110
111 static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
112 u32 status_err, struct sk_buff *skb)
113 {
114 skb_checksum_none_assert(skb);
115
116 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
117 if ((status_err & E1000_RXD_STAT_IXSM) ||
118 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
119 return;
120
121 /* TCP/UDP checksum error bit is set */
122 if (status_err &
123 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
124 /* let the stack verify checksum errors */
125 adapter->hw_csum_err++;
126 return;
127 }
128
129 /* It must be a TCP or UDP packet with a valid checksum */
130 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
131 skb->ip_summed = CHECKSUM_UNNECESSARY;
132
133 adapter->hw_csum_good++;
134 }
135
136 /**
137 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
138 * @rx_ring: address of ring structure to repopulate
139 * @cleaned_count: number of buffers to repopulate
140 **/
141 static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
142 int cleaned_count)
143 {
144 struct igbvf_adapter *adapter = rx_ring->adapter;
145 struct net_device *netdev = adapter->netdev;
146 struct pci_dev *pdev = adapter->pdev;
147 union e1000_adv_rx_desc *rx_desc;
148 struct igbvf_buffer *buffer_info;
149 struct sk_buff *skb;
150 unsigned int i;
151 int bufsz;
152
153 i = rx_ring->next_to_use;
154 buffer_info = &rx_ring->buffer_info[i];
155
156 if (adapter->rx_ps_hdr_size)
157 bufsz = adapter->rx_ps_hdr_size;
158 else
159 bufsz = adapter->rx_buffer_len;
160
161 while (cleaned_count--) {
162 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
163
164 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
165 if (!buffer_info->page) {
166 buffer_info->page = alloc_page(GFP_ATOMIC);
167 if (!buffer_info->page) {
168 adapter->alloc_rx_buff_failed++;
169 goto no_buffers;
170 }
171 buffer_info->page_offset = 0;
172 } else {
173 buffer_info->page_offset ^= PAGE_SIZE / 2;
174 }
175 buffer_info->page_dma =
176 dma_map_page(&pdev->dev, buffer_info->page,
177 buffer_info->page_offset,
178 PAGE_SIZE / 2,
179 DMA_FROM_DEVICE);
180 }
181
182 if (!buffer_info->skb) {
183 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
184 if (!skb) {
185 adapter->alloc_rx_buff_failed++;
186 goto no_buffers;
187 }
188
189 buffer_info->skb = skb;
190 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
191 bufsz,
192 DMA_FROM_DEVICE);
193 }
194 /* Refresh the desc even if buffer_addrs didn't change because
195 * each write-back erases this info. */
196 if (adapter->rx_ps_hdr_size) {
197 rx_desc->read.pkt_addr =
198 cpu_to_le64(buffer_info->page_dma);
199 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
200 } else {
201 rx_desc->read.pkt_addr =
202 cpu_to_le64(buffer_info->dma);
203 rx_desc->read.hdr_addr = 0;
204 }
205
206 i++;
207 if (i == rx_ring->count)
208 i = 0;
209 buffer_info = &rx_ring->buffer_info[i];
210 }
211
212 no_buffers:
213 if (rx_ring->next_to_use != i) {
214 rx_ring->next_to_use = i;
215 if (i == 0)
216 i = (rx_ring->count - 1);
217 else
218 i--;
219
220 /* Force memory writes to complete before letting h/w
221 * know there are new descriptors to fetch. (Only
222 * applicable for weak-ordered memory model archs,
223 * such as IA-64). */
224 wmb();
225 writel(i, adapter->hw.hw_addr + rx_ring->tail);
226 }
227 }
228
229 /**
230 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
231 * @adapter: board private structure
232 *
233 * the return value indicates whether actual cleaning was done, there
234 * is no guarantee that everything was cleaned
235 **/
236 static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
237 int *work_done, int work_to_do)
238 {
239 struct igbvf_ring *rx_ring = adapter->rx_ring;
240 struct net_device *netdev = adapter->netdev;
241 struct pci_dev *pdev = adapter->pdev;
242 union e1000_adv_rx_desc *rx_desc, *next_rxd;
243 struct igbvf_buffer *buffer_info, *next_buffer;
244 struct sk_buff *skb;
245 bool cleaned = false;
246 int cleaned_count = 0;
247 unsigned int total_bytes = 0, total_packets = 0;
248 unsigned int i;
249 u32 length, hlen, staterr;
250
251 i = rx_ring->next_to_clean;
252 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
253 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
254
255 while (staterr & E1000_RXD_STAT_DD) {
256 if (*work_done >= work_to_do)
257 break;
258 (*work_done)++;
259 rmb(); /* read descriptor and rx_buffer_info after status DD */
260
261 buffer_info = &rx_ring->buffer_info[i];
262
263 /* HW will not DMA in data larger than the given buffer, even
264 * if it parses the (NFS, of course) header to be larger. In
265 * that case, it fills the header buffer and spills the rest
266 * into the page.
267 */
268 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) &
269 E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
270 if (hlen > adapter->rx_ps_hdr_size)
271 hlen = adapter->rx_ps_hdr_size;
272
273 length = le16_to_cpu(rx_desc->wb.upper.length);
274 cleaned = true;
275 cleaned_count++;
276
277 skb = buffer_info->skb;
278 prefetch(skb->data - NET_IP_ALIGN);
279 buffer_info->skb = NULL;
280 if (!adapter->rx_ps_hdr_size) {
281 dma_unmap_single(&pdev->dev, buffer_info->dma,
282 adapter->rx_buffer_len,
283 DMA_FROM_DEVICE);
284 buffer_info->dma = 0;
285 skb_put(skb, length);
286 goto send_up;
287 }
288
289 if (!skb_shinfo(skb)->nr_frags) {
290 dma_unmap_single(&pdev->dev, buffer_info->dma,
291 adapter->rx_ps_hdr_size,
292 DMA_FROM_DEVICE);
293 skb_put(skb, hlen);
294 }
295
296 if (length) {
297 dma_unmap_page(&pdev->dev, buffer_info->page_dma,
298 PAGE_SIZE / 2,
299 DMA_FROM_DEVICE);
300 buffer_info->page_dma = 0;
301
302 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
303 buffer_info->page,
304 buffer_info->page_offset,
305 length);
306
307 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
308 (page_count(buffer_info->page) != 1))
309 buffer_info->page = NULL;
310 else
311 get_page(buffer_info->page);
312
313 skb->len += length;
314 skb->data_len += length;
315 skb->truesize += length;
316 }
317 send_up:
318 i++;
319 if (i == rx_ring->count)
320 i = 0;
321 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
322 prefetch(next_rxd);
323 next_buffer = &rx_ring->buffer_info[i];
324
325 if (!(staterr & E1000_RXD_STAT_EOP)) {
326 buffer_info->skb = next_buffer->skb;
327 buffer_info->dma = next_buffer->dma;
328 next_buffer->skb = skb;
329 next_buffer->dma = 0;
330 goto next_desc;
331 }
332
333 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
334 dev_kfree_skb_irq(skb);
335 goto next_desc;
336 }
337
338 total_bytes += skb->len;
339 total_packets++;
340
341 igbvf_rx_checksum_adv(adapter, staterr, skb);
342
343 skb->protocol = eth_type_trans(skb, netdev);
344
345 igbvf_receive_skb(adapter, netdev, skb, staterr,
346 rx_desc->wb.upper.vlan);
347
348 next_desc:
349 rx_desc->wb.upper.status_error = 0;
350
351 /* return some buffers to hardware, one at a time is too slow */
352 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
353 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
354 cleaned_count = 0;
355 }
356
357 /* use prefetched values */
358 rx_desc = next_rxd;
359 buffer_info = next_buffer;
360
361 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
362 }
363
364 rx_ring->next_to_clean = i;
365 cleaned_count = igbvf_desc_unused(rx_ring);
366
367 if (cleaned_count)
368 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
369
370 adapter->total_rx_packets += total_packets;
371 adapter->total_rx_bytes += total_bytes;
372 adapter->net_stats.rx_bytes += total_bytes;
373 adapter->net_stats.rx_packets += total_packets;
374 return cleaned;
375 }
376
377 static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
378 struct igbvf_buffer *buffer_info)
379 {
380 if (buffer_info->dma) {
381 if (buffer_info->mapped_as_page)
382 dma_unmap_page(&adapter->pdev->dev,
383 buffer_info->dma,
384 buffer_info->length,
385 DMA_TO_DEVICE);
386 else
387 dma_unmap_single(&adapter->pdev->dev,
388 buffer_info->dma,
389 buffer_info->length,
390 DMA_TO_DEVICE);
391 buffer_info->dma = 0;
392 }
393 if (buffer_info->skb) {
394 dev_kfree_skb_any(buffer_info->skb);
395 buffer_info->skb = NULL;
396 }
397 buffer_info->time_stamp = 0;
398 }
399
400 /**
401 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
402 * @adapter: board private structure
403 *
404 * Return 0 on success, negative on failure
405 **/
406 int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
407 struct igbvf_ring *tx_ring)
408 {
409 struct pci_dev *pdev = adapter->pdev;
410 int size;
411
412 size = sizeof(struct igbvf_buffer) * tx_ring->count;
413 tx_ring->buffer_info = vzalloc(size);
414 if (!tx_ring->buffer_info)
415 goto err;
416
417 /* round up to nearest 4K */
418 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
419 tx_ring->size = ALIGN(tx_ring->size, 4096);
420
421 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
422 &tx_ring->dma, GFP_KERNEL);
423
424 if (!tx_ring->desc)
425 goto err;
426
427 tx_ring->adapter = adapter;
428 tx_ring->next_to_use = 0;
429 tx_ring->next_to_clean = 0;
430
431 return 0;
432 err:
433 vfree(tx_ring->buffer_info);
434 dev_err(&adapter->pdev->dev,
435 "Unable to allocate memory for the transmit descriptor ring\n");
436 return -ENOMEM;
437 }
438
439 /**
440 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
441 * @adapter: board private structure
442 *
443 * Returns 0 on success, negative on failure
444 **/
445 int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
446 struct igbvf_ring *rx_ring)
447 {
448 struct pci_dev *pdev = adapter->pdev;
449 int size, desc_len;
450
451 size = sizeof(struct igbvf_buffer) * rx_ring->count;
452 rx_ring->buffer_info = vzalloc(size);
453 if (!rx_ring->buffer_info)
454 goto err;
455
456 desc_len = sizeof(union e1000_adv_rx_desc);
457
458 /* Round up to nearest 4K */
459 rx_ring->size = rx_ring->count * desc_len;
460 rx_ring->size = ALIGN(rx_ring->size, 4096);
461
462 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
463 &rx_ring->dma, GFP_KERNEL);
464
465 if (!rx_ring->desc)
466 goto err;
467
468 rx_ring->next_to_clean = 0;
469 rx_ring->next_to_use = 0;
470
471 rx_ring->adapter = adapter;
472
473 return 0;
474
475 err:
476 vfree(rx_ring->buffer_info);
477 rx_ring->buffer_info = NULL;
478 dev_err(&adapter->pdev->dev,
479 "Unable to allocate memory for the receive descriptor ring\n");
480 return -ENOMEM;
481 }
482
483 /**
484 * igbvf_clean_tx_ring - Free Tx Buffers
485 * @tx_ring: ring to be cleaned
486 **/
487 static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
488 {
489 struct igbvf_adapter *adapter = tx_ring->adapter;
490 struct igbvf_buffer *buffer_info;
491 unsigned long size;
492 unsigned int i;
493
494 if (!tx_ring->buffer_info)
495 return;
496
497 /* Free all the Tx ring sk_buffs */
498 for (i = 0; i < tx_ring->count; i++) {
499 buffer_info = &tx_ring->buffer_info[i];
500 igbvf_put_txbuf(adapter, buffer_info);
501 }
502
503 size = sizeof(struct igbvf_buffer) * tx_ring->count;
504 memset(tx_ring->buffer_info, 0, size);
505
506 /* Zero out the descriptor ring */
507 memset(tx_ring->desc, 0, tx_ring->size);
508
509 tx_ring->next_to_use = 0;
510 tx_ring->next_to_clean = 0;
511
512 writel(0, adapter->hw.hw_addr + tx_ring->head);
513 writel(0, adapter->hw.hw_addr + tx_ring->tail);
514 }
515
516 /**
517 * igbvf_free_tx_resources - Free Tx Resources per Queue
518 * @tx_ring: ring to free resources from
519 *
520 * Free all transmit software resources
521 **/
522 void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
523 {
524 struct pci_dev *pdev = tx_ring->adapter->pdev;
525
526 igbvf_clean_tx_ring(tx_ring);
527
528 vfree(tx_ring->buffer_info);
529 tx_ring->buffer_info = NULL;
530
531 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
532 tx_ring->dma);
533
534 tx_ring->desc = NULL;
535 }
536
537 /**
538 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
539 * @adapter: board private structure
540 **/
541 static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
542 {
543 struct igbvf_adapter *adapter = rx_ring->adapter;
544 struct igbvf_buffer *buffer_info;
545 struct pci_dev *pdev = adapter->pdev;
546 unsigned long size;
547 unsigned int i;
548
549 if (!rx_ring->buffer_info)
550 return;
551
552 /* Free all the Rx ring sk_buffs */
553 for (i = 0; i < rx_ring->count; i++) {
554 buffer_info = &rx_ring->buffer_info[i];
555 if (buffer_info->dma) {
556 if (adapter->rx_ps_hdr_size){
557 dma_unmap_single(&pdev->dev, buffer_info->dma,
558 adapter->rx_ps_hdr_size,
559 DMA_FROM_DEVICE);
560 } else {
561 dma_unmap_single(&pdev->dev, buffer_info->dma,
562 adapter->rx_buffer_len,
563 DMA_FROM_DEVICE);
564 }
565 buffer_info->dma = 0;
566 }
567
568 if (buffer_info->skb) {
569 dev_kfree_skb(buffer_info->skb);
570 buffer_info->skb = NULL;
571 }
572
573 if (buffer_info->page) {
574 if (buffer_info->page_dma)
575 dma_unmap_page(&pdev->dev,
576 buffer_info->page_dma,
577 PAGE_SIZE / 2,
578 DMA_FROM_DEVICE);
579 put_page(buffer_info->page);
580 buffer_info->page = NULL;
581 buffer_info->page_dma = 0;
582 buffer_info->page_offset = 0;
583 }
584 }
585
586 size = sizeof(struct igbvf_buffer) * rx_ring->count;
587 memset(rx_ring->buffer_info, 0, size);
588
589 /* Zero out the descriptor ring */
590 memset(rx_ring->desc, 0, rx_ring->size);
591
592 rx_ring->next_to_clean = 0;
593 rx_ring->next_to_use = 0;
594
595 writel(0, adapter->hw.hw_addr + rx_ring->head);
596 writel(0, adapter->hw.hw_addr + rx_ring->tail);
597 }
598
599 /**
600 * igbvf_free_rx_resources - Free Rx Resources
601 * @rx_ring: ring to clean the resources from
602 *
603 * Free all receive software resources
604 **/
605
606 void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
607 {
608 struct pci_dev *pdev = rx_ring->adapter->pdev;
609
610 igbvf_clean_rx_ring(rx_ring);
611
612 vfree(rx_ring->buffer_info);
613 rx_ring->buffer_info = NULL;
614
615 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
616 rx_ring->dma);
617 rx_ring->desc = NULL;
618 }
619
620 /**
621 * igbvf_update_itr - update the dynamic ITR value based on statistics
622 * @adapter: pointer to adapter
623 * @itr_setting: current adapter->itr
624 * @packets: the number of packets during this measurement interval
625 * @bytes: the number of bytes during this measurement interval
626 *
627 * Stores a new ITR value based on packets and byte
628 * counts during the last interrupt. The advantage of per interrupt
629 * computation is faster updates and more accurate ITR for the current
630 * traffic pattern. Constants in this function were computed
631 * based on theoretical maximum wire speed and thresholds were set based
632 * on testing data as well as attempting to minimize response time
633 * while increasing bulk throughput. This functionality is controlled
634 * by the InterruptThrottleRate module parameter.
635 **/
636 static unsigned int igbvf_update_itr(struct igbvf_adapter *adapter,
637 u16 itr_setting, int packets,
638 int bytes)
639 {
640 unsigned int retval = itr_setting;
641
642 if (packets == 0)
643 goto update_itr_done;
644
645 switch (itr_setting) {
646 case lowest_latency:
647 /* handle TSO and jumbo frames */
648 if (bytes/packets > 8000)
649 retval = bulk_latency;
650 else if ((packets < 5) && (bytes > 512))
651 retval = low_latency;
652 break;
653 case low_latency: /* 50 usec aka 20000 ints/s */
654 if (bytes > 10000) {
655 /* this if handles the TSO accounting */
656 if (bytes/packets > 8000)
657 retval = bulk_latency;
658 else if ((packets < 10) || ((bytes/packets) > 1200))
659 retval = bulk_latency;
660 else if ((packets > 35))
661 retval = lowest_latency;
662 } else if (bytes/packets > 2000) {
663 retval = bulk_latency;
664 } else if (packets <= 2 && bytes < 512) {
665 retval = lowest_latency;
666 }
667 break;
668 case bulk_latency: /* 250 usec aka 4000 ints/s */
669 if (bytes > 25000) {
670 if (packets > 35)
671 retval = low_latency;
672 } else if (bytes < 6000) {
673 retval = low_latency;
674 }
675 break;
676 }
677
678 update_itr_done:
679 return retval;
680 }
681
682 static void igbvf_set_itr(struct igbvf_adapter *adapter)
683 {
684 struct e1000_hw *hw = &adapter->hw;
685 u16 current_itr;
686 u32 new_itr = adapter->itr;
687
688 adapter->tx_itr = igbvf_update_itr(adapter, adapter->tx_itr,
689 adapter->total_tx_packets,
690 adapter->total_tx_bytes);
691 /* conservative mode (itr 3) eliminates the lowest_latency setting */
692 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
693 adapter->tx_itr = low_latency;
694
695 adapter->rx_itr = igbvf_update_itr(adapter, adapter->rx_itr,
696 adapter->total_rx_packets,
697 adapter->total_rx_bytes);
698 /* conservative mode (itr 3) eliminates the lowest_latency setting */
699 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
700 adapter->rx_itr = low_latency;
701
702 current_itr = max(adapter->rx_itr, adapter->tx_itr);
703
704 switch (current_itr) {
705 /* counts and packets in update_itr are dependent on these numbers */
706 case lowest_latency:
707 new_itr = 70000;
708 break;
709 case low_latency:
710 new_itr = 20000; /* aka hwitr = ~200 */
711 break;
712 case bulk_latency:
713 new_itr = 4000;
714 break;
715 default:
716 break;
717 }
718
719 if (new_itr != adapter->itr) {
720 /*
721 * this attempts to bias the interrupt rate towards Bulk
722 * by adding intermediate steps when interrupt rate is
723 * increasing
724 */
725 new_itr = new_itr > adapter->itr ?
726 min(adapter->itr + (new_itr >> 2), new_itr) :
727 new_itr;
728 adapter->itr = new_itr;
729 adapter->rx_ring->itr_val = 1952;
730
731 if (adapter->msix_entries)
732 adapter->rx_ring->set_itr = 1;
733 else
734 ew32(ITR, 1952);
735 }
736 }
737
738 /**
739 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
740 * @adapter: board private structure
741 * returns true if ring is completely cleaned
742 **/
743 static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
744 {
745 struct igbvf_adapter *adapter = tx_ring->adapter;
746 struct net_device *netdev = adapter->netdev;
747 struct igbvf_buffer *buffer_info;
748 struct sk_buff *skb;
749 union e1000_adv_tx_desc *tx_desc, *eop_desc;
750 unsigned int total_bytes = 0, total_packets = 0;
751 unsigned int i, eop, count = 0;
752 bool cleaned = false;
753
754 i = tx_ring->next_to_clean;
755 eop = tx_ring->buffer_info[i].next_to_watch;
756 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
757
758 while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
759 (count < tx_ring->count)) {
760 rmb(); /* read buffer_info after eop_desc status */
761 for (cleaned = false; !cleaned; count++) {
762 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
763 buffer_info = &tx_ring->buffer_info[i];
764 cleaned = (i == eop);
765 skb = buffer_info->skb;
766
767 if (skb) {
768 unsigned int segs, bytecount;
769
770 /* gso_segs is currently only valid for tcp */
771 segs = skb_shinfo(skb)->gso_segs ?: 1;
772 /* multiply data chunks by size of headers */
773 bytecount = ((segs - 1) * skb_headlen(skb)) +
774 skb->len;
775 total_packets += segs;
776 total_bytes += bytecount;
777 }
778
779 igbvf_put_txbuf(adapter, buffer_info);
780 tx_desc->wb.status = 0;
781
782 i++;
783 if (i == tx_ring->count)
784 i = 0;
785 }
786 eop = tx_ring->buffer_info[i].next_to_watch;
787 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
788 }
789
790 tx_ring->next_to_clean = i;
791
792 if (unlikely(count &&
793 netif_carrier_ok(netdev) &&
794 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
795 /* Make sure that anybody stopping the queue after this
796 * sees the new next_to_clean.
797 */
798 smp_mb();
799 if (netif_queue_stopped(netdev) &&
800 !(test_bit(__IGBVF_DOWN, &adapter->state))) {
801 netif_wake_queue(netdev);
802 ++adapter->restart_queue;
803 }
804 }
805
806 adapter->net_stats.tx_bytes += total_bytes;
807 adapter->net_stats.tx_packets += total_packets;
808 return count < tx_ring->count;
809 }
810
811 static irqreturn_t igbvf_msix_other(int irq, void *data)
812 {
813 struct net_device *netdev = data;
814 struct igbvf_adapter *adapter = netdev_priv(netdev);
815 struct e1000_hw *hw = &adapter->hw;
816
817 adapter->int_counter1++;
818
819 netif_carrier_off(netdev);
820 hw->mac.get_link_status = 1;
821 if (!test_bit(__IGBVF_DOWN, &adapter->state))
822 mod_timer(&adapter->watchdog_timer, jiffies + 1);
823
824 ew32(EIMS, adapter->eims_other);
825
826 return IRQ_HANDLED;
827 }
828
829 static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
830 {
831 struct net_device *netdev = data;
832 struct igbvf_adapter *adapter = netdev_priv(netdev);
833 struct e1000_hw *hw = &adapter->hw;
834 struct igbvf_ring *tx_ring = adapter->tx_ring;
835
836
837 adapter->total_tx_bytes = 0;
838 adapter->total_tx_packets = 0;
839
840 /* auto mask will automatically reenable the interrupt when we write
841 * EICS */
842 if (!igbvf_clean_tx_irq(tx_ring))
843 /* Ring was not completely cleaned, so fire another interrupt */
844 ew32(EICS, tx_ring->eims_value);
845 else
846 ew32(EIMS, tx_ring->eims_value);
847
848 return IRQ_HANDLED;
849 }
850
851 static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
852 {
853 struct net_device *netdev = data;
854 struct igbvf_adapter *adapter = netdev_priv(netdev);
855
856 adapter->int_counter0++;
857
858 /* Write the ITR value calculated at the end of the
859 * previous interrupt.
860 */
861 if (adapter->rx_ring->set_itr) {
862 writel(adapter->rx_ring->itr_val,
863 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
864 adapter->rx_ring->set_itr = 0;
865 }
866
867 if (napi_schedule_prep(&adapter->rx_ring->napi)) {
868 adapter->total_rx_bytes = 0;
869 adapter->total_rx_packets = 0;
870 __napi_schedule(&adapter->rx_ring->napi);
871 }
872
873 return IRQ_HANDLED;
874 }
875
876 #define IGBVF_NO_QUEUE -1
877
878 static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
879 int tx_queue, int msix_vector)
880 {
881 struct e1000_hw *hw = &adapter->hw;
882 u32 ivar, index;
883
884 /* 82576 uses a table-based method for assigning vectors.
885 Each queue has a single entry in the table to which we write
886 a vector number along with a "valid" bit. Sadly, the layout
887 of the table is somewhat counterintuitive. */
888 if (rx_queue > IGBVF_NO_QUEUE) {
889 index = (rx_queue >> 1);
890 ivar = array_er32(IVAR0, index);
891 if (rx_queue & 0x1) {
892 /* vector goes into third byte of register */
893 ivar = ivar & 0xFF00FFFF;
894 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
895 } else {
896 /* vector goes into low byte of register */
897 ivar = ivar & 0xFFFFFF00;
898 ivar |= msix_vector | E1000_IVAR_VALID;
899 }
900 adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector;
901 array_ew32(IVAR0, index, ivar);
902 }
903 if (tx_queue > IGBVF_NO_QUEUE) {
904 index = (tx_queue >> 1);
905 ivar = array_er32(IVAR0, index);
906 if (tx_queue & 0x1) {
907 /* vector goes into high byte of register */
908 ivar = ivar & 0x00FFFFFF;
909 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
910 } else {
911 /* vector goes into second byte of register */
912 ivar = ivar & 0xFFFF00FF;
913 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
914 }
915 adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector;
916 array_ew32(IVAR0, index, ivar);
917 }
918 }
919
920 /**
921 * igbvf_configure_msix - Configure MSI-X hardware
922 *
923 * igbvf_configure_msix sets up the hardware to properly
924 * generate MSI-X interrupts.
925 **/
926 static void igbvf_configure_msix(struct igbvf_adapter *adapter)
927 {
928 u32 tmp;
929 struct e1000_hw *hw = &adapter->hw;
930 struct igbvf_ring *tx_ring = adapter->tx_ring;
931 struct igbvf_ring *rx_ring = adapter->rx_ring;
932 int vector = 0;
933
934 adapter->eims_enable_mask = 0;
935
936 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
937 adapter->eims_enable_mask |= tx_ring->eims_value;
938 if (tx_ring->itr_val)
939 writel(tx_ring->itr_val,
940 hw->hw_addr + tx_ring->itr_register);
941 else
942 writel(1952, hw->hw_addr + tx_ring->itr_register);
943
944 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
945 adapter->eims_enable_mask |= rx_ring->eims_value;
946 if (rx_ring->itr_val)
947 writel(rx_ring->itr_val,
948 hw->hw_addr + rx_ring->itr_register);
949 else
950 writel(1952, hw->hw_addr + rx_ring->itr_register);
951
952 /* set vector for other causes, i.e. link changes */
953
954 tmp = (vector++ | E1000_IVAR_VALID);
955
956 ew32(IVAR_MISC, tmp);
957
958 adapter->eims_enable_mask = (1 << (vector)) - 1;
959 adapter->eims_other = 1 << (vector - 1);
960 e1e_flush();
961 }
962
963 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
964 {
965 if (adapter->msix_entries) {
966 pci_disable_msix(adapter->pdev);
967 kfree(adapter->msix_entries);
968 adapter->msix_entries = NULL;
969 }
970 }
971
972 /**
973 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
974 *
975 * Attempt to configure interrupts using the best available
976 * capabilities of the hardware and kernel.
977 **/
978 static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
979 {
980 int err = -ENOMEM;
981 int i;
982
983 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
984 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
985 GFP_KERNEL);
986 if (adapter->msix_entries) {
987 for (i = 0; i < 3; i++)
988 adapter->msix_entries[i].entry = i;
989
990 err = pci_enable_msix(adapter->pdev,
991 adapter->msix_entries, 3);
992 }
993
994 if (err) {
995 /* MSI-X failed */
996 dev_err(&adapter->pdev->dev,
997 "Failed to initialize MSI-X interrupts.\n");
998 igbvf_reset_interrupt_capability(adapter);
999 }
1000 }
1001
1002 /**
1003 * igbvf_request_msix - Initialize MSI-X interrupts
1004 *
1005 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1006 * kernel.
1007 **/
1008 static int igbvf_request_msix(struct igbvf_adapter *adapter)
1009 {
1010 struct net_device *netdev = adapter->netdev;
1011 int err = 0, vector = 0;
1012
1013 if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1014 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1015 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1016 } else {
1017 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1018 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1019 }
1020
1021 err = request_irq(adapter->msix_entries[vector].vector,
1022 igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1023 netdev);
1024 if (err)
1025 goto out;
1026
1027 adapter->tx_ring->itr_register = E1000_EITR(vector);
1028 adapter->tx_ring->itr_val = 1952;
1029 vector++;
1030
1031 err = request_irq(adapter->msix_entries[vector].vector,
1032 igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1033 netdev);
1034 if (err)
1035 goto out;
1036
1037 adapter->rx_ring->itr_register = E1000_EITR(vector);
1038 adapter->rx_ring->itr_val = 1952;
1039 vector++;
1040
1041 err = request_irq(adapter->msix_entries[vector].vector,
1042 igbvf_msix_other, 0, netdev->name, netdev);
1043 if (err)
1044 goto out;
1045
1046 igbvf_configure_msix(adapter);
1047 return 0;
1048 out:
1049 return err;
1050 }
1051
1052 /**
1053 * igbvf_alloc_queues - Allocate memory for all rings
1054 * @adapter: board private structure to initialize
1055 **/
1056 static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter)
1057 {
1058 struct net_device *netdev = adapter->netdev;
1059
1060 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1061 if (!adapter->tx_ring)
1062 return -ENOMEM;
1063
1064 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1065 if (!adapter->rx_ring) {
1066 kfree(adapter->tx_ring);
1067 return -ENOMEM;
1068 }
1069
1070 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1071
1072 return 0;
1073 }
1074
1075 /**
1076 * igbvf_request_irq - initialize interrupts
1077 *
1078 * Attempts to configure interrupts using the best available
1079 * capabilities of the hardware and kernel.
1080 **/
1081 static int igbvf_request_irq(struct igbvf_adapter *adapter)
1082 {
1083 int err = -1;
1084
1085 /* igbvf supports msi-x only */
1086 if (adapter->msix_entries)
1087 err = igbvf_request_msix(adapter);
1088
1089 if (!err)
1090 return err;
1091
1092 dev_err(&adapter->pdev->dev,
1093 "Unable to allocate interrupt, Error: %d\n", err);
1094
1095 return err;
1096 }
1097
1098 static void igbvf_free_irq(struct igbvf_adapter *adapter)
1099 {
1100 struct net_device *netdev = adapter->netdev;
1101 int vector;
1102
1103 if (adapter->msix_entries) {
1104 for (vector = 0; vector < 3; vector++)
1105 free_irq(adapter->msix_entries[vector].vector, netdev);
1106 }
1107 }
1108
1109 /**
1110 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1111 **/
1112 static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1113 {
1114 struct e1000_hw *hw = &adapter->hw;
1115
1116 ew32(EIMC, ~0);
1117
1118 if (adapter->msix_entries)
1119 ew32(EIAC, 0);
1120 }
1121
1122 /**
1123 * igbvf_irq_enable - Enable default interrupt generation settings
1124 **/
1125 static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1126 {
1127 struct e1000_hw *hw = &adapter->hw;
1128
1129 ew32(EIAC, adapter->eims_enable_mask);
1130 ew32(EIAM, adapter->eims_enable_mask);
1131 ew32(EIMS, adapter->eims_enable_mask);
1132 }
1133
1134 /**
1135 * igbvf_poll - NAPI Rx polling callback
1136 * @napi: struct associated with this polling callback
1137 * @budget: amount of packets driver is allowed to process this poll
1138 **/
1139 static int igbvf_poll(struct napi_struct *napi, int budget)
1140 {
1141 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1142 struct igbvf_adapter *adapter = rx_ring->adapter;
1143 struct e1000_hw *hw = &adapter->hw;
1144 int work_done = 0;
1145
1146 igbvf_clean_rx_irq(adapter, &work_done, budget);
1147
1148 /* If not enough Rx work done, exit the polling mode */
1149 if (work_done < budget) {
1150 napi_complete(napi);
1151
1152 if (adapter->itr_setting & 3)
1153 igbvf_set_itr(adapter);
1154
1155 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1156 ew32(EIMS, adapter->rx_ring->eims_value);
1157 }
1158
1159 return work_done;
1160 }
1161
1162 /**
1163 * igbvf_set_rlpml - set receive large packet maximum length
1164 * @adapter: board private structure
1165 *
1166 * Configure the maximum size of packets that will be received
1167 */
1168 static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1169 {
1170 int max_frame_size;
1171 struct e1000_hw *hw = &adapter->hw;
1172
1173 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
1174 e1000_rlpml_set_vf(hw, max_frame_size);
1175 }
1176
1177 static void igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1178 {
1179 struct igbvf_adapter *adapter = netdev_priv(netdev);
1180 struct e1000_hw *hw = &adapter->hw;
1181
1182 if (hw->mac.ops.set_vfta(hw, vid, true))
1183 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
1184 else
1185 set_bit(vid, adapter->active_vlans);
1186 }
1187
1188 static void igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1189 {
1190 struct igbvf_adapter *adapter = netdev_priv(netdev);
1191 struct e1000_hw *hw = &adapter->hw;
1192
1193 igbvf_irq_disable(adapter);
1194
1195 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1196 igbvf_irq_enable(adapter);
1197
1198 if (hw->mac.ops.set_vfta(hw, vid, false))
1199 dev_err(&adapter->pdev->dev,
1200 "Failed to remove vlan id %d\n", vid);
1201 else
1202 clear_bit(vid, adapter->active_vlans);
1203 }
1204
1205 static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1206 {
1207 u16 vid;
1208
1209 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1210 igbvf_vlan_rx_add_vid(adapter->netdev, vid);
1211 }
1212
1213 /**
1214 * igbvf_configure_tx - Configure Transmit Unit after Reset
1215 * @adapter: board private structure
1216 *
1217 * Configure the Tx unit of the MAC after a reset.
1218 **/
1219 static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1220 {
1221 struct e1000_hw *hw = &adapter->hw;
1222 struct igbvf_ring *tx_ring = adapter->tx_ring;
1223 u64 tdba;
1224 u32 txdctl, dca_txctrl;
1225
1226 /* disable transmits */
1227 txdctl = er32(TXDCTL(0));
1228 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1229 e1e_flush();
1230 msleep(10);
1231
1232 /* Setup the HW Tx Head and Tail descriptor pointers */
1233 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1234 tdba = tx_ring->dma;
1235 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1236 ew32(TDBAH(0), (tdba >> 32));
1237 ew32(TDH(0), 0);
1238 ew32(TDT(0), 0);
1239 tx_ring->head = E1000_TDH(0);
1240 tx_ring->tail = E1000_TDT(0);
1241
1242 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1243 * MUST be delivered in order or it will completely screw up
1244 * our bookeeping.
1245 */
1246 dca_txctrl = er32(DCA_TXCTRL(0));
1247 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1248 ew32(DCA_TXCTRL(0), dca_txctrl);
1249
1250 /* enable transmits */
1251 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1252 ew32(TXDCTL(0), txdctl);
1253
1254 /* Setup Transmit Descriptor Settings for eop descriptor */
1255 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1256
1257 /* enable Report Status bit */
1258 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1259 }
1260
1261 /**
1262 * igbvf_setup_srrctl - configure the receive control registers
1263 * @adapter: Board private structure
1264 **/
1265 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1266 {
1267 struct e1000_hw *hw = &adapter->hw;
1268 u32 srrctl = 0;
1269
1270 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1271 E1000_SRRCTL_BSIZEHDR_MASK |
1272 E1000_SRRCTL_BSIZEPKT_MASK);
1273
1274 /* Enable queue drop to avoid head of line blocking */
1275 srrctl |= E1000_SRRCTL_DROP_EN;
1276
1277 /* Setup buffer sizes */
1278 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1279 E1000_SRRCTL_BSIZEPKT_SHIFT;
1280
1281 if (adapter->rx_buffer_len < 2048) {
1282 adapter->rx_ps_hdr_size = 0;
1283 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1284 } else {
1285 adapter->rx_ps_hdr_size = 128;
1286 srrctl |= adapter->rx_ps_hdr_size <<
1287 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1288 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1289 }
1290
1291 ew32(SRRCTL(0), srrctl);
1292 }
1293
1294 /**
1295 * igbvf_configure_rx - Configure Receive Unit after Reset
1296 * @adapter: board private structure
1297 *
1298 * Configure the Rx unit of the MAC after a reset.
1299 **/
1300 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1301 {
1302 struct e1000_hw *hw = &adapter->hw;
1303 struct igbvf_ring *rx_ring = adapter->rx_ring;
1304 u64 rdba;
1305 u32 rdlen, rxdctl;
1306
1307 /* disable receives */
1308 rxdctl = er32(RXDCTL(0));
1309 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1310 e1e_flush();
1311 msleep(10);
1312
1313 rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc);
1314
1315 /*
1316 * Setup the HW Rx Head and Tail Descriptor Pointers and
1317 * the Base and Length of the Rx Descriptor Ring
1318 */
1319 rdba = rx_ring->dma;
1320 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1321 ew32(RDBAH(0), (rdba >> 32));
1322 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1323 rx_ring->head = E1000_RDH(0);
1324 rx_ring->tail = E1000_RDT(0);
1325 ew32(RDH(0), 0);
1326 ew32(RDT(0), 0);
1327
1328 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1329 rxdctl &= 0xFFF00000;
1330 rxdctl |= IGBVF_RX_PTHRESH;
1331 rxdctl |= IGBVF_RX_HTHRESH << 8;
1332 rxdctl |= IGBVF_RX_WTHRESH << 16;
1333
1334 igbvf_set_rlpml(adapter);
1335
1336 /* enable receives */
1337 ew32(RXDCTL(0), rxdctl);
1338 }
1339
1340 /**
1341 * igbvf_set_multi - Multicast and Promiscuous mode set
1342 * @netdev: network interface device structure
1343 *
1344 * The set_multi entry point is called whenever the multicast address
1345 * list or the network interface flags are updated. This routine is
1346 * responsible for configuring the hardware for proper multicast,
1347 * promiscuous mode, and all-multi behavior.
1348 **/
1349 static void igbvf_set_multi(struct net_device *netdev)
1350 {
1351 struct igbvf_adapter *adapter = netdev_priv(netdev);
1352 struct e1000_hw *hw = &adapter->hw;
1353 struct netdev_hw_addr *ha;
1354 u8 *mta_list = NULL;
1355 int i;
1356
1357 if (!netdev_mc_empty(netdev)) {
1358 mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
1359 if (!mta_list) {
1360 dev_err(&adapter->pdev->dev,
1361 "failed to allocate multicast filter list\n");
1362 return;
1363 }
1364 }
1365
1366 /* prepare a packed array of only addresses. */
1367 i = 0;
1368 netdev_for_each_mc_addr(ha, netdev)
1369 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
1370
1371 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1372 kfree(mta_list);
1373 }
1374
1375 /**
1376 * igbvf_configure - configure the hardware for Rx and Tx
1377 * @adapter: private board structure
1378 **/
1379 static void igbvf_configure(struct igbvf_adapter *adapter)
1380 {
1381 igbvf_set_multi(adapter->netdev);
1382
1383 igbvf_restore_vlan(adapter);
1384
1385 igbvf_configure_tx(adapter);
1386 igbvf_setup_srrctl(adapter);
1387 igbvf_configure_rx(adapter);
1388 igbvf_alloc_rx_buffers(adapter->rx_ring,
1389 igbvf_desc_unused(adapter->rx_ring));
1390 }
1391
1392 /* igbvf_reset - bring the hardware into a known good state
1393 *
1394 * This function boots the hardware and enables some settings that
1395 * require a configuration cycle of the hardware - those cannot be
1396 * set/changed during runtime. After reset the device needs to be
1397 * properly configured for Rx, Tx etc.
1398 */
1399 static void igbvf_reset(struct igbvf_adapter *adapter)
1400 {
1401 struct e1000_mac_info *mac = &adapter->hw.mac;
1402 struct net_device *netdev = adapter->netdev;
1403 struct e1000_hw *hw = &adapter->hw;
1404
1405 /* Allow time for pending master requests to run */
1406 if (mac->ops.reset_hw(hw))
1407 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1408
1409 mac->ops.init_hw(hw);
1410
1411 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1412 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1413 netdev->addr_len);
1414 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1415 netdev->addr_len);
1416 }
1417
1418 adapter->last_reset = jiffies;
1419 }
1420
1421 int igbvf_up(struct igbvf_adapter *adapter)
1422 {
1423 struct e1000_hw *hw = &adapter->hw;
1424
1425 /* hardware has been reset, we need to reload some things */
1426 igbvf_configure(adapter);
1427
1428 clear_bit(__IGBVF_DOWN, &adapter->state);
1429
1430 napi_enable(&adapter->rx_ring->napi);
1431 if (adapter->msix_entries)
1432 igbvf_configure_msix(adapter);
1433
1434 /* Clear any pending interrupts. */
1435 er32(EICR);
1436 igbvf_irq_enable(adapter);
1437
1438 /* start the watchdog */
1439 hw->mac.get_link_status = 1;
1440 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1441
1442
1443 return 0;
1444 }
1445
1446 void igbvf_down(struct igbvf_adapter *adapter)
1447 {
1448 struct net_device *netdev = adapter->netdev;
1449 struct e1000_hw *hw = &adapter->hw;
1450 u32 rxdctl, txdctl;
1451
1452 /*
1453 * signal that we're down so the interrupt handler does not
1454 * reschedule our watchdog timer
1455 */
1456 set_bit(__IGBVF_DOWN, &adapter->state);
1457
1458 /* disable receives in the hardware */
1459 rxdctl = er32(RXDCTL(0));
1460 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1461
1462 netif_stop_queue(netdev);
1463
1464 /* disable transmits in the hardware */
1465 txdctl = er32(TXDCTL(0));
1466 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1467
1468 /* flush both disables and wait for them to finish */
1469 e1e_flush();
1470 msleep(10);
1471
1472 napi_disable(&adapter->rx_ring->napi);
1473
1474 igbvf_irq_disable(adapter);
1475
1476 del_timer_sync(&adapter->watchdog_timer);
1477
1478 netif_carrier_off(netdev);
1479
1480 /* record the stats before reset*/
1481 igbvf_update_stats(adapter);
1482
1483 adapter->link_speed = 0;
1484 adapter->link_duplex = 0;
1485
1486 igbvf_reset(adapter);
1487 igbvf_clean_tx_ring(adapter->tx_ring);
1488 igbvf_clean_rx_ring(adapter->rx_ring);
1489 }
1490
1491 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1492 {
1493 might_sleep();
1494 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1495 msleep(1);
1496 igbvf_down(adapter);
1497 igbvf_up(adapter);
1498 clear_bit(__IGBVF_RESETTING, &adapter->state);
1499 }
1500
1501 /**
1502 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1503 * @adapter: board private structure to initialize
1504 *
1505 * igbvf_sw_init initializes the Adapter private data structure.
1506 * Fields are initialized based on PCI device information and
1507 * OS network device settings (MTU size).
1508 **/
1509 static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter)
1510 {
1511 struct net_device *netdev = adapter->netdev;
1512 s32 rc;
1513
1514 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1515 adapter->rx_ps_hdr_size = 0;
1516 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1517 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1518
1519 adapter->tx_int_delay = 8;
1520 adapter->tx_abs_int_delay = 32;
1521 adapter->rx_int_delay = 0;
1522 adapter->rx_abs_int_delay = 8;
1523 adapter->itr_setting = 3;
1524 adapter->itr = 20000;
1525
1526 /* Set various function pointers */
1527 adapter->ei->init_ops(&adapter->hw);
1528
1529 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1530 if (rc)
1531 return rc;
1532
1533 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1534 if (rc)
1535 return rc;
1536
1537 igbvf_set_interrupt_capability(adapter);
1538
1539 if (igbvf_alloc_queues(adapter))
1540 return -ENOMEM;
1541
1542 spin_lock_init(&adapter->tx_queue_lock);
1543
1544 /* Explicitly disable IRQ since the NIC can be in any state. */
1545 igbvf_irq_disable(adapter);
1546
1547 spin_lock_init(&adapter->stats_lock);
1548
1549 set_bit(__IGBVF_DOWN, &adapter->state);
1550 return 0;
1551 }
1552
1553 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1554 {
1555 struct e1000_hw *hw = &adapter->hw;
1556
1557 adapter->stats.last_gprc = er32(VFGPRC);
1558 adapter->stats.last_gorc = er32(VFGORC);
1559 adapter->stats.last_gptc = er32(VFGPTC);
1560 adapter->stats.last_gotc = er32(VFGOTC);
1561 adapter->stats.last_mprc = er32(VFMPRC);
1562 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1563 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1564 adapter->stats.last_gorlbc = er32(VFGORLBC);
1565 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1566
1567 adapter->stats.base_gprc = er32(VFGPRC);
1568 adapter->stats.base_gorc = er32(VFGORC);
1569 adapter->stats.base_gptc = er32(VFGPTC);
1570 adapter->stats.base_gotc = er32(VFGOTC);
1571 adapter->stats.base_mprc = er32(VFMPRC);
1572 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1573 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1574 adapter->stats.base_gorlbc = er32(VFGORLBC);
1575 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1576 }
1577
1578 /**
1579 * igbvf_open - Called when a network interface is made active
1580 * @netdev: network interface device structure
1581 *
1582 * Returns 0 on success, negative value on failure
1583 *
1584 * The open entry point is called when a network interface is made
1585 * active by the system (IFF_UP). At this point all resources needed
1586 * for transmit and receive operations are allocated, the interrupt
1587 * handler is registered with the OS, the watchdog timer is started,
1588 * and the stack is notified that the interface is ready.
1589 **/
1590 static int igbvf_open(struct net_device *netdev)
1591 {
1592 struct igbvf_adapter *adapter = netdev_priv(netdev);
1593 struct e1000_hw *hw = &adapter->hw;
1594 int err;
1595
1596 /* disallow open during test */
1597 if (test_bit(__IGBVF_TESTING, &adapter->state))
1598 return -EBUSY;
1599
1600 /* allocate transmit descriptors */
1601 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1602 if (err)
1603 goto err_setup_tx;
1604
1605 /* allocate receive descriptors */
1606 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1607 if (err)
1608 goto err_setup_rx;
1609
1610 /*
1611 * before we allocate an interrupt, we must be ready to handle it.
1612 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1613 * as soon as we call pci_request_irq, so we have to setup our
1614 * clean_rx handler before we do so.
1615 */
1616 igbvf_configure(adapter);
1617
1618 err = igbvf_request_irq(adapter);
1619 if (err)
1620 goto err_req_irq;
1621
1622 /* From here on the code is the same as igbvf_up() */
1623 clear_bit(__IGBVF_DOWN, &adapter->state);
1624
1625 napi_enable(&adapter->rx_ring->napi);
1626
1627 /* clear any pending interrupts */
1628 er32(EICR);
1629
1630 igbvf_irq_enable(adapter);
1631
1632 /* start the watchdog */
1633 hw->mac.get_link_status = 1;
1634 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1635
1636 return 0;
1637
1638 err_req_irq:
1639 igbvf_free_rx_resources(adapter->rx_ring);
1640 err_setup_rx:
1641 igbvf_free_tx_resources(adapter->tx_ring);
1642 err_setup_tx:
1643 igbvf_reset(adapter);
1644
1645 return err;
1646 }
1647
1648 /**
1649 * igbvf_close - Disables a network interface
1650 * @netdev: network interface device structure
1651 *
1652 * Returns 0, this is not allowed to fail
1653 *
1654 * The close entry point is called when an interface is de-activated
1655 * by the OS. The hardware is still under the drivers control, but
1656 * needs to be disabled. A global MAC reset is issued to stop the
1657 * hardware, and all transmit and receive resources are freed.
1658 **/
1659 static int igbvf_close(struct net_device *netdev)
1660 {
1661 struct igbvf_adapter *adapter = netdev_priv(netdev);
1662
1663 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1664 igbvf_down(adapter);
1665
1666 igbvf_free_irq(adapter);
1667
1668 igbvf_free_tx_resources(adapter->tx_ring);
1669 igbvf_free_rx_resources(adapter->rx_ring);
1670
1671 return 0;
1672 }
1673 /**
1674 * igbvf_set_mac - Change the Ethernet Address of the NIC
1675 * @netdev: network interface device structure
1676 * @p: pointer to an address structure
1677 *
1678 * Returns 0 on success, negative on failure
1679 **/
1680 static int igbvf_set_mac(struct net_device *netdev, void *p)
1681 {
1682 struct igbvf_adapter *adapter = netdev_priv(netdev);
1683 struct e1000_hw *hw = &adapter->hw;
1684 struct sockaddr *addr = p;
1685
1686 if (!is_valid_ether_addr(addr->sa_data))
1687 return -EADDRNOTAVAIL;
1688
1689 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1690
1691 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1692
1693 if (memcmp(addr->sa_data, hw->mac.addr, 6))
1694 return -EADDRNOTAVAIL;
1695
1696 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1697
1698 return 0;
1699 }
1700
1701 #define UPDATE_VF_COUNTER(reg, name) \
1702 { \
1703 u32 current_counter = er32(reg); \
1704 if (current_counter < adapter->stats.last_##name) \
1705 adapter->stats.name += 0x100000000LL; \
1706 adapter->stats.last_##name = current_counter; \
1707 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1708 adapter->stats.name |= current_counter; \
1709 }
1710
1711 /**
1712 * igbvf_update_stats - Update the board statistics counters
1713 * @adapter: board private structure
1714 **/
1715 void igbvf_update_stats(struct igbvf_adapter *adapter)
1716 {
1717 struct e1000_hw *hw = &adapter->hw;
1718 struct pci_dev *pdev = adapter->pdev;
1719
1720 /*
1721 * Prevent stats update while adapter is being reset, link is down
1722 * or if the pci connection is down.
1723 */
1724 if (adapter->link_speed == 0)
1725 return;
1726
1727 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1728 return;
1729
1730 if (pci_channel_offline(pdev))
1731 return;
1732
1733 UPDATE_VF_COUNTER(VFGPRC, gprc);
1734 UPDATE_VF_COUNTER(VFGORC, gorc);
1735 UPDATE_VF_COUNTER(VFGPTC, gptc);
1736 UPDATE_VF_COUNTER(VFGOTC, gotc);
1737 UPDATE_VF_COUNTER(VFMPRC, mprc);
1738 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1739 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1740 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1741 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1742
1743 /* Fill out the OS statistics structure */
1744 adapter->net_stats.multicast = adapter->stats.mprc;
1745 }
1746
1747 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1748 {
1749 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s\n",
1750 adapter->link_speed,
1751 ((adapter->link_duplex == FULL_DUPLEX) ?
1752 "Full Duplex" : "Half Duplex"));
1753 }
1754
1755 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1756 {
1757 struct e1000_hw *hw = &adapter->hw;
1758 s32 ret_val = E1000_SUCCESS;
1759 bool link_active;
1760
1761 /* If interface is down, stay link down */
1762 if (test_bit(__IGBVF_DOWN, &adapter->state))
1763 return false;
1764
1765 ret_val = hw->mac.ops.check_for_link(hw);
1766 link_active = !hw->mac.get_link_status;
1767
1768 /* if check for link returns error we will need to reset */
1769 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1770 schedule_work(&adapter->reset_task);
1771
1772 return link_active;
1773 }
1774
1775 /**
1776 * igbvf_watchdog - Timer Call-back
1777 * @data: pointer to adapter cast into an unsigned long
1778 **/
1779 static void igbvf_watchdog(unsigned long data)
1780 {
1781 struct igbvf_adapter *adapter = (struct igbvf_adapter *) data;
1782
1783 /* Do the rest outside of interrupt context */
1784 schedule_work(&adapter->watchdog_task);
1785 }
1786
1787 static void igbvf_watchdog_task(struct work_struct *work)
1788 {
1789 struct igbvf_adapter *adapter = container_of(work,
1790 struct igbvf_adapter,
1791 watchdog_task);
1792 struct net_device *netdev = adapter->netdev;
1793 struct e1000_mac_info *mac = &adapter->hw.mac;
1794 struct igbvf_ring *tx_ring = adapter->tx_ring;
1795 struct e1000_hw *hw = &adapter->hw;
1796 u32 link;
1797 int tx_pending = 0;
1798
1799 link = igbvf_has_link(adapter);
1800
1801 if (link) {
1802 if (!netif_carrier_ok(netdev)) {
1803 mac->ops.get_link_up_info(&adapter->hw,
1804 &adapter->link_speed,
1805 &adapter->link_duplex);
1806 igbvf_print_link_info(adapter);
1807
1808 netif_carrier_on(netdev);
1809 netif_wake_queue(netdev);
1810 }
1811 } else {
1812 if (netif_carrier_ok(netdev)) {
1813 adapter->link_speed = 0;
1814 adapter->link_duplex = 0;
1815 dev_info(&adapter->pdev->dev, "Link is Down\n");
1816 netif_carrier_off(netdev);
1817 netif_stop_queue(netdev);
1818 }
1819 }
1820
1821 if (netif_carrier_ok(netdev)) {
1822 igbvf_update_stats(adapter);
1823 } else {
1824 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1825 tx_ring->count);
1826 if (tx_pending) {
1827 /*
1828 * We've lost link, so the controller stops DMA,
1829 * but we've got queued Tx work that's never going
1830 * to get done, so reset controller to flush Tx.
1831 * (Do the reset outside of interrupt context).
1832 */
1833 adapter->tx_timeout_count++;
1834 schedule_work(&adapter->reset_task);
1835 }
1836 }
1837
1838 /* Cause software interrupt to ensure Rx ring is cleaned */
1839 ew32(EICS, adapter->rx_ring->eims_value);
1840
1841 /* Reset the timer */
1842 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1843 mod_timer(&adapter->watchdog_timer,
1844 round_jiffies(jiffies + (2 * HZ)));
1845 }
1846
1847 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1848 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1849 #define IGBVF_TX_FLAGS_TSO 0x00000004
1850 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1851 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1852 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1853
1854 static int igbvf_tso(struct igbvf_adapter *adapter,
1855 struct igbvf_ring *tx_ring,
1856 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
1857 {
1858 struct e1000_adv_tx_context_desc *context_desc;
1859 unsigned int i;
1860 int err;
1861 struct igbvf_buffer *buffer_info;
1862 u32 info = 0, tu_cmd = 0;
1863 u32 mss_l4len_idx, l4len;
1864 *hdr_len = 0;
1865
1866 if (skb_header_cloned(skb)) {
1867 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1868 if (err) {
1869 dev_err(&adapter->pdev->dev,
1870 "igbvf_tso returning an error\n");
1871 return err;
1872 }
1873 }
1874
1875 l4len = tcp_hdrlen(skb);
1876 *hdr_len += l4len;
1877
1878 if (skb->protocol == htons(ETH_P_IP)) {
1879 struct iphdr *iph = ip_hdr(skb);
1880 iph->tot_len = 0;
1881 iph->check = 0;
1882 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1883 iph->daddr, 0,
1884 IPPROTO_TCP,
1885 0);
1886 } else if (skb_is_gso_v6(skb)) {
1887 ipv6_hdr(skb)->payload_len = 0;
1888 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
1889 &ipv6_hdr(skb)->daddr,
1890 0, IPPROTO_TCP, 0);
1891 }
1892
1893 i = tx_ring->next_to_use;
1894
1895 buffer_info = &tx_ring->buffer_info[i];
1896 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1897 /* VLAN MACLEN IPLEN */
1898 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1899 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1900 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1901 *hdr_len += skb_network_offset(skb);
1902 info |= (skb_transport_header(skb) - skb_network_header(skb));
1903 *hdr_len += (skb_transport_header(skb) - skb_network_header(skb));
1904 context_desc->vlan_macip_lens = cpu_to_le32(info);
1905
1906 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1907 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1908
1909 if (skb->protocol == htons(ETH_P_IP))
1910 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1911 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1912
1913 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1914
1915 /* MSS L4LEN IDX */
1916 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
1917 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
1918
1919 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1920 context_desc->seqnum_seed = 0;
1921
1922 buffer_info->time_stamp = jiffies;
1923 buffer_info->next_to_watch = i;
1924 buffer_info->dma = 0;
1925 i++;
1926 if (i == tx_ring->count)
1927 i = 0;
1928
1929 tx_ring->next_to_use = i;
1930
1931 return true;
1932 }
1933
1934 static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter,
1935 struct igbvf_ring *tx_ring,
1936 struct sk_buff *skb, u32 tx_flags)
1937 {
1938 struct e1000_adv_tx_context_desc *context_desc;
1939 unsigned int i;
1940 struct igbvf_buffer *buffer_info;
1941 u32 info = 0, tu_cmd = 0;
1942
1943 if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
1944 (tx_flags & IGBVF_TX_FLAGS_VLAN)) {
1945 i = tx_ring->next_to_use;
1946 buffer_info = &tx_ring->buffer_info[i];
1947 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1948
1949 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1950 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1951
1952 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1953 if (skb->ip_summed == CHECKSUM_PARTIAL)
1954 info |= (skb_transport_header(skb) -
1955 skb_network_header(skb));
1956
1957
1958 context_desc->vlan_macip_lens = cpu_to_le32(info);
1959
1960 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1961
1962 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1963 switch (skb->protocol) {
1964 case __constant_htons(ETH_P_IP):
1965 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1966 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1967 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1968 break;
1969 case __constant_htons(ETH_P_IPV6):
1970 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1971 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1972 break;
1973 default:
1974 break;
1975 }
1976 }
1977
1978 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1979 context_desc->seqnum_seed = 0;
1980 context_desc->mss_l4len_idx = 0;
1981
1982 buffer_info->time_stamp = jiffies;
1983 buffer_info->next_to_watch = i;
1984 buffer_info->dma = 0;
1985 i++;
1986 if (i == tx_ring->count)
1987 i = 0;
1988 tx_ring->next_to_use = i;
1989
1990 return true;
1991 }
1992
1993 return false;
1994 }
1995
1996 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
1997 {
1998 struct igbvf_adapter *adapter = netdev_priv(netdev);
1999
2000 /* there is enough descriptors then we don't need to worry */
2001 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2002 return 0;
2003
2004 netif_stop_queue(netdev);
2005
2006 smp_mb();
2007
2008 /* We need to check again just in case room has been made available */
2009 if (igbvf_desc_unused(adapter->tx_ring) < size)
2010 return -EBUSY;
2011
2012 netif_wake_queue(netdev);
2013
2014 ++adapter->restart_queue;
2015 return 0;
2016 }
2017
2018 #define IGBVF_MAX_TXD_PWR 16
2019 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2020
2021 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2022 struct igbvf_ring *tx_ring,
2023 struct sk_buff *skb,
2024 unsigned int first)
2025 {
2026 struct igbvf_buffer *buffer_info;
2027 struct pci_dev *pdev = adapter->pdev;
2028 unsigned int len = skb_headlen(skb);
2029 unsigned int count = 0, i;
2030 unsigned int f;
2031
2032 i = tx_ring->next_to_use;
2033
2034 buffer_info = &tx_ring->buffer_info[i];
2035 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2036 buffer_info->length = len;
2037 /* set time_stamp *before* dma to help avoid a possible race */
2038 buffer_info->time_stamp = jiffies;
2039 buffer_info->next_to_watch = i;
2040 buffer_info->mapped_as_page = false;
2041 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2042 DMA_TO_DEVICE);
2043 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2044 goto dma_error;
2045
2046
2047 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2048 struct skb_frag_struct *frag;
2049
2050 count++;
2051 i++;
2052 if (i == tx_ring->count)
2053 i = 0;
2054
2055 frag = &skb_shinfo(skb)->frags[f];
2056 len = frag->size;
2057
2058 buffer_info = &tx_ring->buffer_info[i];
2059 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2060 buffer_info->length = len;
2061 buffer_info->time_stamp = jiffies;
2062 buffer_info->next_to_watch = i;
2063 buffer_info->mapped_as_page = true;
2064 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len,
2065 DMA_TO_DEVICE);
2066 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2067 goto dma_error;
2068 }
2069
2070 tx_ring->buffer_info[i].skb = skb;
2071 tx_ring->buffer_info[first].next_to_watch = i;
2072
2073 return ++count;
2074
2075 dma_error:
2076 dev_err(&pdev->dev, "TX DMA map failed\n");
2077
2078 /* clear timestamp and dma mappings for failed buffer_info mapping */
2079 buffer_info->dma = 0;
2080 buffer_info->time_stamp = 0;
2081 buffer_info->length = 0;
2082 buffer_info->next_to_watch = 0;
2083 buffer_info->mapped_as_page = false;
2084 if (count)
2085 count--;
2086
2087 /* clear timestamp and dma mappings for remaining portion of packet */
2088 while (count--) {
2089 if (i==0)
2090 i += tx_ring->count;
2091 i--;
2092 buffer_info = &tx_ring->buffer_info[i];
2093 igbvf_put_txbuf(adapter, buffer_info);
2094 }
2095
2096 return 0;
2097 }
2098
2099 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2100 struct igbvf_ring *tx_ring,
2101 int tx_flags, int count, u32 paylen,
2102 u8 hdr_len)
2103 {
2104 union e1000_adv_tx_desc *tx_desc = NULL;
2105 struct igbvf_buffer *buffer_info;
2106 u32 olinfo_status = 0, cmd_type_len;
2107 unsigned int i;
2108
2109 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2110 E1000_ADVTXD_DCMD_DEXT);
2111
2112 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2113 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2114
2115 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2116 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2117
2118 /* insert tcp checksum */
2119 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2120
2121 /* insert ip checksum */
2122 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2123 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2124
2125 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2126 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2127 }
2128
2129 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2130
2131 i = tx_ring->next_to_use;
2132 while (count--) {
2133 buffer_info = &tx_ring->buffer_info[i];
2134 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2135 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2136 tx_desc->read.cmd_type_len =
2137 cpu_to_le32(cmd_type_len | buffer_info->length);
2138 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2139 i++;
2140 if (i == tx_ring->count)
2141 i = 0;
2142 }
2143
2144 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2145 /* Force memory writes to complete before letting h/w
2146 * know there are new descriptors to fetch. (Only
2147 * applicable for weak-ordered memory model archs,
2148 * such as IA-64). */
2149 wmb();
2150
2151 tx_ring->next_to_use = i;
2152 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2153 /* we need this if more than one processor can write to our tail
2154 * at a time, it syncronizes IO on IA64/Altix systems */
2155 mmiowb();
2156 }
2157
2158 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2159 struct net_device *netdev,
2160 struct igbvf_ring *tx_ring)
2161 {
2162 struct igbvf_adapter *adapter = netdev_priv(netdev);
2163 unsigned int first, tx_flags = 0;
2164 u8 hdr_len = 0;
2165 int count = 0;
2166 int tso = 0;
2167
2168 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2169 dev_kfree_skb_any(skb);
2170 return NETDEV_TX_OK;
2171 }
2172
2173 if (skb->len <= 0) {
2174 dev_kfree_skb_any(skb);
2175 return NETDEV_TX_OK;
2176 }
2177
2178 /*
2179 * need: count + 4 desc gap to keep tail from touching
2180 * + 2 desc gap to keep tail from touching head,
2181 * + 1 desc for skb->data,
2182 * + 1 desc for context descriptor,
2183 * head, otherwise try next time
2184 */
2185 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2186 /* this is a hard error */
2187 return NETDEV_TX_BUSY;
2188 }
2189
2190 if (vlan_tx_tag_present(skb)) {
2191 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2192 tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT);
2193 }
2194
2195 if (skb->protocol == htons(ETH_P_IP))
2196 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2197
2198 first = tx_ring->next_to_use;
2199
2200 tso = skb_is_gso(skb) ?
2201 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0;
2202 if (unlikely(tso < 0)) {
2203 dev_kfree_skb_any(skb);
2204 return NETDEV_TX_OK;
2205 }
2206
2207 if (tso)
2208 tx_flags |= IGBVF_TX_FLAGS_TSO;
2209 else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
2210 (skb->ip_summed == CHECKSUM_PARTIAL))
2211 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2212
2213 /*
2214 * count reflects descriptors mapped, if 0 then mapping error
2215 * has occurred and we need to rewind the descriptor queue
2216 */
2217 count = igbvf_tx_map_adv(adapter, tx_ring, skb, first);
2218
2219 if (count) {
2220 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2221 skb->len, hdr_len);
2222 /* Make sure there is space in the ring for the next send. */
2223 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2224 } else {
2225 dev_kfree_skb_any(skb);
2226 tx_ring->buffer_info[first].time_stamp = 0;
2227 tx_ring->next_to_use = first;
2228 }
2229
2230 return NETDEV_TX_OK;
2231 }
2232
2233 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2234 struct net_device *netdev)
2235 {
2236 struct igbvf_adapter *adapter = netdev_priv(netdev);
2237 struct igbvf_ring *tx_ring;
2238
2239 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2240 dev_kfree_skb_any(skb);
2241 return NETDEV_TX_OK;
2242 }
2243
2244 tx_ring = &adapter->tx_ring[0];
2245
2246 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2247 }
2248
2249 /**
2250 * igbvf_tx_timeout - Respond to a Tx Hang
2251 * @netdev: network interface device structure
2252 **/
2253 static void igbvf_tx_timeout(struct net_device *netdev)
2254 {
2255 struct igbvf_adapter *adapter = netdev_priv(netdev);
2256
2257 /* Do the reset outside of interrupt context */
2258 adapter->tx_timeout_count++;
2259 schedule_work(&adapter->reset_task);
2260 }
2261
2262 static void igbvf_reset_task(struct work_struct *work)
2263 {
2264 struct igbvf_adapter *adapter;
2265 adapter = container_of(work, struct igbvf_adapter, reset_task);
2266
2267 igbvf_reinit_locked(adapter);
2268 }
2269
2270 /**
2271 * igbvf_get_stats - Get System Network Statistics
2272 * @netdev: network interface device structure
2273 *
2274 * Returns the address of the device statistics structure.
2275 * The statistics are actually updated from the timer callback.
2276 **/
2277 static struct net_device_stats *igbvf_get_stats(struct net_device *netdev)
2278 {
2279 struct igbvf_adapter *adapter = netdev_priv(netdev);
2280
2281 /* only return the current stats */
2282 return &adapter->net_stats;
2283 }
2284
2285 /**
2286 * igbvf_change_mtu - Change the Maximum Transfer Unit
2287 * @netdev: network interface device structure
2288 * @new_mtu: new value for maximum frame size
2289 *
2290 * Returns 0 on success, negative on failure
2291 **/
2292 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2293 {
2294 struct igbvf_adapter *adapter = netdev_priv(netdev);
2295 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2296
2297 if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2298 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n");
2299 return -EINVAL;
2300 }
2301
2302 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2303 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2304 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
2305 return -EINVAL;
2306 }
2307
2308 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2309 msleep(1);
2310 /* igbvf_down has a dependency on max_frame_size */
2311 adapter->max_frame_size = max_frame;
2312 if (netif_running(netdev))
2313 igbvf_down(adapter);
2314
2315 /*
2316 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2317 * means we reserve 2 more, this pushes us to allocate from the next
2318 * larger slab size.
2319 * i.e. RXBUFFER_2048 --> size-4096 slab
2320 * However with the new *_jumbo_rx* routines, jumbo receives will use
2321 * fragmented skbs
2322 */
2323
2324 if (max_frame <= 1024)
2325 adapter->rx_buffer_len = 1024;
2326 else if (max_frame <= 2048)
2327 adapter->rx_buffer_len = 2048;
2328 else
2329 #if (PAGE_SIZE / 2) > 16384
2330 adapter->rx_buffer_len = 16384;
2331 #else
2332 adapter->rx_buffer_len = PAGE_SIZE / 2;
2333 #endif
2334
2335
2336 /* adjust allocation if LPE protects us, and we aren't using SBP */
2337 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2338 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2339 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2340 ETH_FCS_LEN;
2341
2342 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
2343 netdev->mtu, new_mtu);
2344 netdev->mtu = new_mtu;
2345
2346 if (netif_running(netdev))
2347 igbvf_up(adapter);
2348 else
2349 igbvf_reset(adapter);
2350
2351 clear_bit(__IGBVF_RESETTING, &adapter->state);
2352
2353 return 0;
2354 }
2355
2356 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2357 {
2358 switch (cmd) {
2359 default:
2360 return -EOPNOTSUPP;
2361 }
2362 }
2363
2364 static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state)
2365 {
2366 struct net_device *netdev = pci_get_drvdata(pdev);
2367 struct igbvf_adapter *adapter = netdev_priv(netdev);
2368 #ifdef CONFIG_PM
2369 int retval = 0;
2370 #endif
2371
2372 netif_device_detach(netdev);
2373
2374 if (netif_running(netdev)) {
2375 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2376 igbvf_down(adapter);
2377 igbvf_free_irq(adapter);
2378 }
2379
2380 #ifdef CONFIG_PM
2381 retval = pci_save_state(pdev);
2382 if (retval)
2383 return retval;
2384 #endif
2385
2386 pci_disable_device(pdev);
2387
2388 return 0;
2389 }
2390
2391 #ifdef CONFIG_PM
2392 static int igbvf_resume(struct pci_dev *pdev)
2393 {
2394 struct net_device *netdev = pci_get_drvdata(pdev);
2395 struct igbvf_adapter *adapter = netdev_priv(netdev);
2396 u32 err;
2397
2398 pci_restore_state(pdev);
2399 err = pci_enable_device_mem(pdev);
2400 if (err) {
2401 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2402 return err;
2403 }
2404
2405 pci_set_master(pdev);
2406
2407 if (netif_running(netdev)) {
2408 err = igbvf_request_irq(adapter);
2409 if (err)
2410 return err;
2411 }
2412
2413 igbvf_reset(adapter);
2414
2415 if (netif_running(netdev))
2416 igbvf_up(adapter);
2417
2418 netif_device_attach(netdev);
2419
2420 return 0;
2421 }
2422 #endif
2423
2424 static void igbvf_shutdown(struct pci_dev *pdev)
2425 {
2426 igbvf_suspend(pdev, PMSG_SUSPEND);
2427 }
2428
2429 #ifdef CONFIG_NET_POLL_CONTROLLER
2430 /*
2431 * Polling 'interrupt' - used by things like netconsole to send skbs
2432 * without having to re-enable interrupts. It's not called while
2433 * the interrupt routine is executing.
2434 */
2435 static void igbvf_netpoll(struct net_device *netdev)
2436 {
2437 struct igbvf_adapter *adapter = netdev_priv(netdev);
2438
2439 disable_irq(adapter->pdev->irq);
2440
2441 igbvf_clean_tx_irq(adapter->tx_ring);
2442
2443 enable_irq(adapter->pdev->irq);
2444 }
2445 #endif
2446
2447 /**
2448 * igbvf_io_error_detected - called when PCI error is detected
2449 * @pdev: Pointer to PCI device
2450 * @state: The current pci connection state
2451 *
2452 * This function is called after a PCI bus error affecting
2453 * this device has been detected.
2454 */
2455 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2456 pci_channel_state_t state)
2457 {
2458 struct net_device *netdev = pci_get_drvdata(pdev);
2459 struct igbvf_adapter *adapter = netdev_priv(netdev);
2460
2461 netif_device_detach(netdev);
2462
2463 if (state == pci_channel_io_perm_failure)
2464 return PCI_ERS_RESULT_DISCONNECT;
2465
2466 if (netif_running(netdev))
2467 igbvf_down(adapter);
2468 pci_disable_device(pdev);
2469
2470 /* Request a slot slot reset. */
2471 return PCI_ERS_RESULT_NEED_RESET;
2472 }
2473
2474 /**
2475 * igbvf_io_slot_reset - called after the pci bus has been reset.
2476 * @pdev: Pointer to PCI device
2477 *
2478 * Restart the card from scratch, as if from a cold-boot. Implementation
2479 * resembles the first-half of the igbvf_resume routine.
2480 */
2481 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2482 {
2483 struct net_device *netdev = pci_get_drvdata(pdev);
2484 struct igbvf_adapter *adapter = netdev_priv(netdev);
2485
2486 if (pci_enable_device_mem(pdev)) {
2487 dev_err(&pdev->dev,
2488 "Cannot re-enable PCI device after reset.\n");
2489 return PCI_ERS_RESULT_DISCONNECT;
2490 }
2491 pci_set_master(pdev);
2492
2493 igbvf_reset(adapter);
2494
2495 return PCI_ERS_RESULT_RECOVERED;
2496 }
2497
2498 /**
2499 * igbvf_io_resume - called when traffic can start flowing again.
2500 * @pdev: Pointer to PCI device
2501 *
2502 * This callback is called when the error recovery driver tells us that
2503 * its OK to resume normal operation. Implementation resembles the
2504 * second-half of the igbvf_resume routine.
2505 */
2506 static void igbvf_io_resume(struct pci_dev *pdev)
2507 {
2508 struct net_device *netdev = pci_get_drvdata(pdev);
2509 struct igbvf_adapter *adapter = netdev_priv(netdev);
2510
2511 if (netif_running(netdev)) {
2512 if (igbvf_up(adapter)) {
2513 dev_err(&pdev->dev,
2514 "can't bring device back up after reset\n");
2515 return;
2516 }
2517 }
2518
2519 netif_device_attach(netdev);
2520 }
2521
2522 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2523 {
2524 struct e1000_hw *hw = &adapter->hw;
2525 struct net_device *netdev = adapter->netdev;
2526 struct pci_dev *pdev = adapter->pdev;
2527
2528 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2529 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2530 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
2531 }
2532
2533 static const struct net_device_ops igbvf_netdev_ops = {
2534 .ndo_open = igbvf_open,
2535 .ndo_stop = igbvf_close,
2536 .ndo_start_xmit = igbvf_xmit_frame,
2537 .ndo_get_stats = igbvf_get_stats,
2538 .ndo_set_rx_mode = igbvf_set_multi,
2539 .ndo_set_mac_address = igbvf_set_mac,
2540 .ndo_change_mtu = igbvf_change_mtu,
2541 .ndo_do_ioctl = igbvf_ioctl,
2542 .ndo_tx_timeout = igbvf_tx_timeout,
2543 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2544 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2545 #ifdef CONFIG_NET_POLL_CONTROLLER
2546 .ndo_poll_controller = igbvf_netpoll,
2547 #endif
2548 };
2549
2550 /**
2551 * igbvf_probe - Device Initialization Routine
2552 * @pdev: PCI device information struct
2553 * @ent: entry in igbvf_pci_tbl
2554 *
2555 * Returns 0 on success, negative on failure
2556 *
2557 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2558 * The OS initialization, configuring of the adapter private structure,
2559 * and a hardware reset occur.
2560 **/
2561 static int __devinit igbvf_probe(struct pci_dev *pdev,
2562 const struct pci_device_id *ent)
2563 {
2564 struct net_device *netdev;
2565 struct igbvf_adapter *adapter;
2566 struct e1000_hw *hw;
2567 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2568
2569 static int cards_found;
2570 int err, pci_using_dac;
2571
2572 err = pci_enable_device_mem(pdev);
2573 if (err)
2574 return err;
2575
2576 pci_using_dac = 0;
2577 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
2578 if (!err) {
2579 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2580 if (!err)
2581 pci_using_dac = 1;
2582 } else {
2583 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
2584 if (err) {
2585 err = dma_set_coherent_mask(&pdev->dev,
2586 DMA_BIT_MASK(32));
2587 if (err) {
2588 dev_err(&pdev->dev, "No usable DMA "
2589 "configuration, aborting\n");
2590 goto err_dma;
2591 }
2592 }
2593 }
2594
2595 err = pci_request_regions(pdev, igbvf_driver_name);
2596 if (err)
2597 goto err_pci_reg;
2598
2599 pci_set_master(pdev);
2600
2601 err = -ENOMEM;
2602 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2603 if (!netdev)
2604 goto err_alloc_etherdev;
2605
2606 SET_NETDEV_DEV(netdev, &pdev->dev);
2607
2608 pci_set_drvdata(pdev, netdev);
2609 adapter = netdev_priv(netdev);
2610 hw = &adapter->hw;
2611 adapter->netdev = netdev;
2612 adapter->pdev = pdev;
2613 adapter->ei = ei;
2614 adapter->pba = ei->pba;
2615 adapter->flags = ei->flags;
2616 adapter->hw.back = adapter;
2617 adapter->hw.mac.type = ei->mac;
2618 adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
2619
2620 /* PCI config space info */
2621
2622 hw->vendor_id = pdev->vendor;
2623 hw->device_id = pdev->device;
2624 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2625 hw->subsystem_device_id = pdev->subsystem_device;
2626 hw->revision_id = pdev->revision;
2627
2628 err = -EIO;
2629 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2630 pci_resource_len(pdev, 0));
2631
2632 if (!adapter->hw.hw_addr)
2633 goto err_ioremap;
2634
2635 if (ei->get_variants) {
2636 err = ei->get_variants(adapter);
2637 if (err)
2638 goto err_ioremap;
2639 }
2640
2641 /* setup adapter struct */
2642 err = igbvf_sw_init(adapter);
2643 if (err)
2644 goto err_sw_init;
2645
2646 /* construct the net_device struct */
2647 netdev->netdev_ops = &igbvf_netdev_ops;
2648
2649 igbvf_set_ethtool_ops(netdev);
2650 netdev->watchdog_timeo = 5 * HZ;
2651 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2652
2653 adapter->bd_number = cards_found++;
2654
2655 netdev->features = NETIF_F_SG |
2656 NETIF_F_IP_CSUM |
2657 NETIF_F_HW_VLAN_TX |
2658 NETIF_F_HW_VLAN_RX |
2659 NETIF_F_HW_VLAN_FILTER;
2660
2661 netdev->features |= NETIF_F_IPV6_CSUM;
2662 netdev->features |= NETIF_F_TSO;
2663 netdev->features |= NETIF_F_TSO6;
2664
2665 if (pci_using_dac)
2666 netdev->features |= NETIF_F_HIGHDMA;
2667
2668 netdev->vlan_features |= NETIF_F_TSO;
2669 netdev->vlan_features |= NETIF_F_TSO6;
2670 netdev->vlan_features |= NETIF_F_IP_CSUM;
2671 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
2672 netdev->vlan_features |= NETIF_F_SG;
2673
2674 /*reset the controller to put the device in a known good state */
2675 err = hw->mac.ops.reset_hw(hw);
2676 if (err) {
2677 dev_info(&pdev->dev,
2678 "PF still in reset state, assigning new address."
2679 " Is the PF interface up?\n");
2680 dev_hw_addr_random(adapter->netdev, hw->mac.addr);
2681 } else {
2682 err = hw->mac.ops.read_mac_addr(hw);
2683 if (err) {
2684 dev_err(&pdev->dev, "Error reading MAC address\n");
2685 goto err_hw_init;
2686 }
2687 }
2688
2689 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2690 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2691
2692 if (!is_valid_ether_addr(netdev->perm_addr)) {
2693 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n",
2694 netdev->dev_addr);
2695 err = -EIO;
2696 goto err_hw_init;
2697 }
2698
2699 setup_timer(&adapter->watchdog_timer, &igbvf_watchdog,
2700 (unsigned long) adapter);
2701
2702 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2703 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2704
2705 /* ring size defaults */
2706 adapter->rx_ring->count = 1024;
2707 adapter->tx_ring->count = 1024;
2708
2709 /* reset the hardware with the new settings */
2710 igbvf_reset(adapter);
2711
2712 strcpy(netdev->name, "eth%d");
2713 err = register_netdev(netdev);
2714 if (err)
2715 goto err_hw_init;
2716
2717 /* tell the stack to leave us alone until igbvf_open() is called */
2718 netif_carrier_off(netdev);
2719 netif_stop_queue(netdev);
2720
2721 igbvf_print_device_info(adapter);
2722
2723 igbvf_initialize_last_counter_stats(adapter);
2724
2725 return 0;
2726
2727 err_hw_init:
2728 kfree(adapter->tx_ring);
2729 kfree(adapter->rx_ring);
2730 err_sw_init:
2731 igbvf_reset_interrupt_capability(adapter);
2732 iounmap(adapter->hw.hw_addr);
2733 err_ioremap:
2734 free_netdev(netdev);
2735 err_alloc_etherdev:
2736 pci_release_regions(pdev);
2737 err_pci_reg:
2738 err_dma:
2739 pci_disable_device(pdev);
2740 return err;
2741 }
2742
2743 /**
2744 * igbvf_remove - Device Removal Routine
2745 * @pdev: PCI device information struct
2746 *
2747 * igbvf_remove is called by the PCI subsystem to alert the driver
2748 * that it should release a PCI device. The could be caused by a
2749 * Hot-Plug event, or because the driver is going to be removed from
2750 * memory.
2751 **/
2752 static void __devexit igbvf_remove(struct pci_dev *pdev)
2753 {
2754 struct net_device *netdev = pci_get_drvdata(pdev);
2755 struct igbvf_adapter *adapter = netdev_priv(netdev);
2756 struct e1000_hw *hw = &adapter->hw;
2757
2758 /*
2759 * The watchdog timer may be rescheduled, so explicitly
2760 * disable it from being rescheduled.
2761 */
2762 set_bit(__IGBVF_DOWN, &adapter->state);
2763 del_timer_sync(&adapter->watchdog_timer);
2764
2765 cancel_work_sync(&adapter->reset_task);
2766 cancel_work_sync(&adapter->watchdog_task);
2767
2768 unregister_netdev(netdev);
2769
2770 igbvf_reset_interrupt_capability(adapter);
2771
2772 /*
2773 * it is important to delete the napi struct prior to freeing the
2774 * rx ring so that you do not end up with null pointer refs
2775 */
2776 netif_napi_del(&adapter->rx_ring->napi);
2777 kfree(adapter->tx_ring);
2778 kfree(adapter->rx_ring);
2779
2780 iounmap(hw->hw_addr);
2781 if (hw->flash_address)
2782 iounmap(hw->flash_address);
2783 pci_release_regions(pdev);
2784
2785 free_netdev(netdev);
2786
2787 pci_disable_device(pdev);
2788 }
2789
2790 /* PCI Error Recovery (ERS) */
2791 static struct pci_error_handlers igbvf_err_handler = {
2792 .error_detected = igbvf_io_error_detected,
2793 .slot_reset = igbvf_io_slot_reset,
2794 .resume = igbvf_io_resume,
2795 };
2796
2797 static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl) = {
2798 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2799 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
2800 { } /* terminate list */
2801 };
2802 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2803
2804 /* PCI Device API Driver */
2805 static struct pci_driver igbvf_driver = {
2806 .name = igbvf_driver_name,
2807 .id_table = igbvf_pci_tbl,
2808 .probe = igbvf_probe,
2809 .remove = __devexit_p(igbvf_remove),
2810 #ifdef CONFIG_PM
2811 /* Power Management Hooks */
2812 .suspend = igbvf_suspend,
2813 .resume = igbvf_resume,
2814 #endif
2815 .shutdown = igbvf_shutdown,
2816 .err_handler = &igbvf_err_handler
2817 };
2818
2819 /**
2820 * igbvf_init_module - Driver Registration Routine
2821 *
2822 * igbvf_init_module is the first routine called when the driver is
2823 * loaded. All it does is register with the PCI subsystem.
2824 **/
2825 static int __init igbvf_init_module(void)
2826 {
2827 int ret;
2828 printk(KERN_INFO "%s - version %s\n",
2829 igbvf_driver_string, igbvf_driver_version);
2830 printk(KERN_INFO "%s\n", igbvf_copyright);
2831
2832 ret = pci_register_driver(&igbvf_driver);
2833
2834 return ret;
2835 }
2836 module_init(igbvf_init_module);
2837
2838 /**
2839 * igbvf_exit_module - Driver Exit Cleanup Routine
2840 *
2841 * igbvf_exit_module is called just before the driver is removed
2842 * from memory.
2843 **/
2844 static void __exit igbvf_exit_module(void)
2845 {
2846 pci_unregister_driver(&igbvf_driver);
2847 }
2848 module_exit(igbvf_exit_module);
2849
2850
2851 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2852 MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver");
2853 MODULE_LICENSE("GPL");
2854 MODULE_VERSION(DRV_VERSION);
2855
2856 /* netdev.c */
linux-next