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Add linux-next specific files for 20110426
[linux-2.6/next.git] / drivers / net / igbvf / netdev.c
blob1d04ca6fdaeac1e952e514367e6d69a144c9cac3
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
45 #include "igbvf.h"
46
47 #define DRV_VERSION "1.0.8-k0"
48 char igbvf_driver_name[] = "igbvf";
49 const char igbvf_driver_version[] = DRV_VERSION;
50 static const char igbvf_driver_string[] =
51 "Intel(R) Virtual Function Network Driver";
52 static const char igbvf_copyright[] =
53 "Copyright (c) 2009 - 2010 Intel Corporation.";
54
55 static int igbvf_poll(struct napi_struct *napi, int budget);
56 static void igbvf_reset(struct igbvf_adapter *);
57 static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
58 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
59
60 static struct igbvf_info igbvf_vf_info = {
61 .mac = e1000_vfadapt,
62 .flags = 0,
63 .pba = 10,
64 .init_ops = e1000_init_function_pointers_vf,
65 };
66
67 static struct igbvf_info igbvf_i350_vf_info = {
68 .mac = e1000_vfadapt_i350,
69 .flags = 0,
70 .pba = 10,
71 .init_ops = e1000_init_function_pointers_vf,
72 };
73
74 static const struct igbvf_info *igbvf_info_tbl[] = {
75 [board_vf] = &igbvf_vf_info,
76 [board_i350_vf] = &igbvf_i350_vf_info,
77 };
78
79 /**
80 * igbvf_desc_unused - calculate if we have unused descriptors
81 **/
82 static int igbvf_desc_unused(struct igbvf_ring *ring)
83 {
84 if (ring->next_to_clean > ring->next_to_use)
85 return ring->next_to_clean - ring->next_to_use - 1;
86
87 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
88 }
89
90 /**
91 * igbvf_receive_skb - helper function to handle Rx indications
92 * @adapter: board private structure
93 * @status: descriptor status field as written by hardware
94 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
95 * @skb: pointer to sk_buff to be indicated to stack
96 **/
97 static void igbvf_receive_skb(struct igbvf_adapter *adapter,
98 struct net_device *netdev,
99 struct sk_buff *skb,
100 u32 status, u16 vlan)
101 {
102 if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
103 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
104 le16_to_cpu(vlan) &
105 E1000_RXD_SPC_VLAN_MASK);
106 else
107 netif_receive_skb(skb);
108 }
109
110 static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
111 u32 status_err, struct sk_buff *skb)
112 {
113 skb_checksum_none_assert(skb);
114
115 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
116 if ((status_err & E1000_RXD_STAT_IXSM) ||
117 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
118 return;
119
120 /* TCP/UDP checksum error bit is set */
121 if (status_err &
122 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
123 /* let the stack verify checksum errors */
124 adapter->hw_csum_err++;
125 return;
126 }
127
128 /* It must be a TCP or UDP packet with a valid checksum */
129 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
130 skb->ip_summed = CHECKSUM_UNNECESSARY;
131
132 adapter->hw_csum_good++;
133 }
134
135 /**
136 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
137 * @rx_ring: address of ring structure to repopulate
138 * @cleaned_count: number of buffers to repopulate
139 **/
140 static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
141 int cleaned_count)
142 {
143 struct igbvf_adapter *adapter = rx_ring->adapter;
144 struct net_device *netdev = adapter->netdev;
145 struct pci_dev *pdev = adapter->pdev;
146 union e1000_adv_rx_desc *rx_desc;
147 struct igbvf_buffer *buffer_info;
148 struct sk_buff *skb;
149 unsigned int i;
150 int bufsz;
151
152 i = rx_ring->next_to_use;
153 buffer_info = &rx_ring->buffer_info[i];
154
155 if (adapter->rx_ps_hdr_size)
156 bufsz = adapter->rx_ps_hdr_size;
157 else
158 bufsz = adapter->rx_buffer_len;
159
160 while (cleaned_count--) {
161 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
162
163 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
164 if (!buffer_info->page) {
165 buffer_info->page = alloc_page(GFP_ATOMIC);
166 if (!buffer_info->page) {
167 adapter->alloc_rx_buff_failed++;
168 goto no_buffers;
169 }
170 buffer_info->page_offset = 0;
171 } else {
172 buffer_info->page_offset ^= PAGE_SIZE / 2;
173 }
174 buffer_info->page_dma =
175 dma_map_page(&pdev->dev, buffer_info->page,
176 buffer_info->page_offset,
177 PAGE_SIZE / 2,
178 DMA_FROM_DEVICE);
179 }
180
181 if (!buffer_info->skb) {
182 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
183 if (!skb) {
184 adapter->alloc_rx_buff_failed++;
185 goto no_buffers;
186 }
187
188 buffer_info->skb = skb;
189 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
190 bufsz,
191 DMA_FROM_DEVICE);
192 }
193 /* Refresh the desc even if buffer_addrs didn't change because
194 * each write-back erases this info. */
195 if (adapter->rx_ps_hdr_size) {
196 rx_desc->read.pkt_addr =
197 cpu_to_le64(buffer_info->page_dma);
198 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
199 } else {
200 rx_desc->read.pkt_addr =
201 cpu_to_le64(buffer_info->dma);
202 rx_desc->read.hdr_addr = 0;
203 }
204
205 i++;
206 if (i == rx_ring->count)
207 i = 0;
208 buffer_info = &rx_ring->buffer_info[i];
209 }
210
211 no_buffers:
212 if (rx_ring->next_to_use != i) {
213 rx_ring->next_to_use = i;
214 if (i == 0)
215 i = (rx_ring->count - 1);
216 else
217 i--;
218
219 /* Force memory writes to complete before letting h/w
220 * know there are new descriptors to fetch. (Only
221 * applicable for weak-ordered memory model archs,
222 * such as IA-64). */
223 wmb();
224 writel(i, adapter->hw.hw_addr + rx_ring->tail);
225 }
226 }
227
228 /**
229 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
230 * @adapter: board private structure
231 *
232 * the return value indicates whether actual cleaning was done, there
233 * is no guarantee that everything was cleaned
234 **/
235 static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
236 int *work_done, int work_to_do)
237 {
238 struct igbvf_ring *rx_ring = adapter->rx_ring;
239 struct net_device *netdev = adapter->netdev;
240 struct pci_dev *pdev = adapter->pdev;
241 union e1000_adv_rx_desc *rx_desc, *next_rxd;
242 struct igbvf_buffer *buffer_info, *next_buffer;
243 struct sk_buff *skb;
244 bool cleaned = false;
245 int cleaned_count = 0;
246 unsigned int total_bytes = 0, total_packets = 0;
247 unsigned int i;
248 u32 length, hlen, staterr;
249
250 i = rx_ring->next_to_clean;
251 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
252 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
253
254 while (staterr & E1000_RXD_STAT_DD) {
255 if (*work_done >= work_to_do)
256 break;
257 (*work_done)++;
258 rmb(); /* read descriptor and rx_buffer_info after status DD */
259
260 buffer_info = &rx_ring->buffer_info[i];
261
262 /* HW will not DMA in data larger than the given buffer, even
263 * if it parses the (NFS, of course) header to be larger. In
264 * that case, it fills the header buffer and spills the rest
265 * into the page.
266 */
267 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) &
268 E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
269 if (hlen > adapter->rx_ps_hdr_size)
270 hlen = adapter->rx_ps_hdr_size;
271
272 length = le16_to_cpu(rx_desc->wb.upper.length);
273 cleaned = true;
274 cleaned_count++;
275
276 skb = buffer_info->skb;
277 prefetch(skb->data - NET_IP_ALIGN);
278 buffer_info->skb = NULL;
279 if (!adapter->rx_ps_hdr_size) {
280 dma_unmap_single(&pdev->dev, buffer_info->dma,
281 adapter->rx_buffer_len,
282 DMA_FROM_DEVICE);
283 buffer_info->dma = 0;
284 skb_put(skb, length);
285 goto send_up;
286 }
287
288 if (!skb_shinfo(skb)->nr_frags) {
289 dma_unmap_single(&pdev->dev, buffer_info->dma,
290 adapter->rx_ps_hdr_size,
291 DMA_FROM_DEVICE);
292 skb_put(skb, hlen);
293 }
294
295 if (length) {
296 dma_unmap_page(&pdev->dev, buffer_info->page_dma,
297 PAGE_SIZE / 2,
298 DMA_FROM_DEVICE);
299 buffer_info->page_dma = 0;
300
301 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
302 buffer_info->page,
303 buffer_info->page_offset,
304 length);
305
306 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
307 (page_count(buffer_info->page) != 1))
308 buffer_info->page = NULL;
309 else
310 get_page(buffer_info->page);
311
312 skb->len += length;
313 skb->data_len += length;
314 skb->truesize += length;
315 }
316 send_up:
317 i++;
318 if (i == rx_ring->count)
319 i = 0;
320 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
321 prefetch(next_rxd);
322 next_buffer = &rx_ring->buffer_info[i];
323
324 if (!(staterr & E1000_RXD_STAT_EOP)) {
325 buffer_info->skb = next_buffer->skb;
326 buffer_info->dma = next_buffer->dma;
327 next_buffer->skb = skb;
328 next_buffer->dma = 0;
329 goto next_desc;
330 }
331
332 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
333 dev_kfree_skb_irq(skb);
334 goto next_desc;
335 }
336
337 total_bytes += skb->len;
338 total_packets++;
339
340 igbvf_rx_checksum_adv(adapter, staterr, skb);
341
342 skb->protocol = eth_type_trans(skb, netdev);
343
344 igbvf_receive_skb(adapter, netdev, skb, staterr,
345 rx_desc->wb.upper.vlan);
346
347 next_desc:
348 rx_desc->wb.upper.status_error = 0;
349
350 /* return some buffers to hardware, one at a time is too slow */
351 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
352 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
353 cleaned_count = 0;
354 }
355
356 /* use prefetched values */
357 rx_desc = next_rxd;
358 buffer_info = next_buffer;
359
360 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
361 }
362
363 rx_ring->next_to_clean = i;
364 cleaned_count = igbvf_desc_unused(rx_ring);
365
366 if (cleaned_count)
367 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
368
369 adapter->total_rx_packets += total_packets;
370 adapter->total_rx_bytes += total_bytes;
371 adapter->net_stats.rx_bytes += total_bytes;
372 adapter->net_stats.rx_packets += total_packets;
373 return cleaned;
374 }
375
376 static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
377 struct igbvf_buffer *buffer_info)
378 {
379 if (buffer_info->dma) {
380 if (buffer_info->mapped_as_page)
381 dma_unmap_page(&adapter->pdev->dev,
382 buffer_info->dma,
383 buffer_info->length,
384 DMA_TO_DEVICE);
385 else
386 dma_unmap_single(&adapter->pdev->dev,
387 buffer_info->dma,
388 buffer_info->length,
389 DMA_TO_DEVICE);
390 buffer_info->dma = 0;
391 }
392 if (buffer_info->skb) {
393 dev_kfree_skb_any(buffer_info->skb);
394 buffer_info->skb = NULL;
395 }
396 buffer_info->time_stamp = 0;
397 }
398
399 /**
400 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
401 * @adapter: board private structure
402 *
403 * Return 0 on success, negative on failure
404 **/
405 int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
406 struct igbvf_ring *tx_ring)
407 {
408 struct pci_dev *pdev = adapter->pdev;
409 int size;
410
411 size = sizeof(struct igbvf_buffer) * tx_ring->count;
412 tx_ring->buffer_info = vzalloc(size);
413 if (!tx_ring->buffer_info)
414 goto err;
415
416 /* round up to nearest 4K */
417 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
418 tx_ring->size = ALIGN(tx_ring->size, 4096);
419
420 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
421 &tx_ring->dma, GFP_KERNEL);
422
423 if (!tx_ring->desc)
424 goto err;
425
426 tx_ring->adapter = adapter;
427 tx_ring->next_to_use = 0;
428 tx_ring->next_to_clean = 0;
429
430 return 0;
431 err:
432 vfree(tx_ring->buffer_info);
433 dev_err(&adapter->pdev->dev,
434 "Unable to allocate memory for the transmit descriptor ring\n");
435 return -ENOMEM;
436 }
437
438 /**
439 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
440 * @adapter: board private structure
441 *
442 * Returns 0 on success, negative on failure
443 **/
444 int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
445 struct igbvf_ring *rx_ring)
446 {
447 struct pci_dev *pdev = adapter->pdev;
448 int size, desc_len;
449
450 size = sizeof(struct igbvf_buffer) * rx_ring->count;
451 rx_ring->buffer_info = vzalloc(size);
452 if (!rx_ring->buffer_info)
453 goto err;
454
455 desc_len = sizeof(union e1000_adv_rx_desc);
456
457 /* Round up to nearest 4K */
458 rx_ring->size = rx_ring->count * desc_len;
459 rx_ring->size = ALIGN(rx_ring->size, 4096);
460
461 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
462 &rx_ring->dma, GFP_KERNEL);
463
464 if (!rx_ring->desc)
465 goto err;
466
467 rx_ring->next_to_clean = 0;
468 rx_ring->next_to_use = 0;
469
470 rx_ring->adapter = adapter;
471
472 return 0;
473
474 err:
475 vfree(rx_ring->buffer_info);
476 rx_ring->buffer_info = NULL;
477 dev_err(&adapter->pdev->dev,
478 "Unable to allocate memory for the receive descriptor ring\n");
479 return -ENOMEM;
480 }
481
482 /**
483 * igbvf_clean_tx_ring - Free Tx Buffers
484 * @tx_ring: ring to be cleaned
485 **/
486 static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
487 {
488 struct igbvf_adapter *adapter = tx_ring->adapter;
489 struct igbvf_buffer *buffer_info;
490 unsigned long size;
491 unsigned int i;
492
493 if (!tx_ring->buffer_info)
494 return;
495
496 /* Free all the Tx ring sk_buffs */
497 for (i = 0; i < tx_ring->count; i++) {
498 buffer_info = &tx_ring->buffer_info[i];
499 igbvf_put_txbuf(adapter, buffer_info);
500 }
501
502 size = sizeof(struct igbvf_buffer) * tx_ring->count;
503 memset(tx_ring->buffer_info, 0, size);
504
505 /* Zero out the descriptor ring */
506 memset(tx_ring->desc, 0, tx_ring->size);
507
508 tx_ring->next_to_use = 0;
509 tx_ring->next_to_clean = 0;
510
511 writel(0, adapter->hw.hw_addr + tx_ring->head);
512 writel(0, adapter->hw.hw_addr + tx_ring->tail);
513 }
514
515 /**
516 * igbvf_free_tx_resources - Free Tx Resources per Queue
517 * @tx_ring: ring to free resources from
518 *
519 * Free all transmit software resources
520 **/
521 void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
522 {
523 struct pci_dev *pdev = tx_ring->adapter->pdev;
524
525 igbvf_clean_tx_ring(tx_ring);
526
527 vfree(tx_ring->buffer_info);
528 tx_ring->buffer_info = NULL;
529
530 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
531 tx_ring->dma);
532
533 tx_ring->desc = NULL;
534 }
535
536 /**
537 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
538 * @adapter: board private structure
539 **/
540 static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
541 {
542 struct igbvf_adapter *adapter = rx_ring->adapter;
543 struct igbvf_buffer *buffer_info;
544 struct pci_dev *pdev = adapter->pdev;
545 unsigned long size;
546 unsigned int i;
547
548 if (!rx_ring->buffer_info)
549 return;
550
551 /* Free all the Rx ring sk_buffs */
552 for (i = 0; i < rx_ring->count; i++) {
553 buffer_info = &rx_ring->buffer_info[i];
554 if (buffer_info->dma) {
555 if (adapter->rx_ps_hdr_size){
556 dma_unmap_single(&pdev->dev, buffer_info->dma,
557 adapter->rx_ps_hdr_size,
558 DMA_FROM_DEVICE);
559 } else {
560 dma_unmap_single(&pdev->dev, buffer_info->dma,
561 adapter->rx_buffer_len,
562 DMA_FROM_DEVICE);
563 }
564 buffer_info->dma = 0;
565 }
566
567 if (buffer_info->skb) {
568 dev_kfree_skb(buffer_info->skb);
569 buffer_info->skb = NULL;
570 }
571
572 if (buffer_info->page) {
573 if (buffer_info->page_dma)
574 dma_unmap_page(&pdev->dev,
575 buffer_info->page_dma,
576 PAGE_SIZE / 2,
577 DMA_FROM_DEVICE);
578 put_page(buffer_info->page);
579 buffer_info->page = NULL;
580 buffer_info->page_dma = 0;
581 buffer_info->page_offset = 0;
582 }
583 }
584
585 size = sizeof(struct igbvf_buffer) * rx_ring->count;
586 memset(rx_ring->buffer_info, 0, size);
587
588 /* Zero out the descriptor ring */
589 memset(rx_ring->desc, 0, rx_ring->size);
590
591 rx_ring->next_to_clean = 0;
592 rx_ring->next_to_use = 0;
593
594 writel(0, adapter->hw.hw_addr + rx_ring->head);
595 writel(0, adapter->hw.hw_addr + rx_ring->tail);
596 }
597
598 /**
599 * igbvf_free_rx_resources - Free Rx Resources
600 * @rx_ring: ring to clean the resources from
601 *
602 * Free all receive software resources
603 **/
604
605 void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
606 {
607 struct pci_dev *pdev = rx_ring->adapter->pdev;
608
609 igbvf_clean_rx_ring(rx_ring);
610
611 vfree(rx_ring->buffer_info);
612 rx_ring->buffer_info = NULL;
613
614 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
615 rx_ring->dma);
616 rx_ring->desc = NULL;
617 }
618
619 /**
620 * igbvf_update_itr - update the dynamic ITR value based on statistics
621 * @adapter: pointer to adapter
622 * @itr_setting: current adapter->itr
623 * @packets: the number of packets during this measurement interval
624 * @bytes: the number of bytes during this measurement interval
625 *
626 * Stores a new ITR value based on packets and byte
627 * counts during the last interrupt. The advantage of per interrupt
628 * computation is faster updates and more accurate ITR for the current
629 * traffic pattern. Constants in this function were computed
630 * based on theoretical maximum wire speed and thresholds were set based
631 * on testing data as well as attempting to minimize response time
632 * while increasing bulk throughput. This functionality is controlled
633 * by the InterruptThrottleRate module parameter.
634 **/
635 static unsigned int igbvf_update_itr(struct igbvf_adapter *adapter,
636 u16 itr_setting, int packets,
637 int bytes)
638 {
639 unsigned int retval = itr_setting;
640
641 if (packets == 0)
642 goto update_itr_done;
643
644 switch (itr_setting) {
645 case lowest_latency:
646 /* handle TSO and jumbo frames */
647 if (bytes/packets > 8000)
648 retval = bulk_latency;
649 else if ((packets < 5) && (bytes > 512))
650 retval = low_latency;
651 break;
652 case low_latency: /* 50 usec aka 20000 ints/s */
653 if (bytes > 10000) {
654 /* this if handles the TSO accounting */
655 if (bytes/packets > 8000)
656 retval = bulk_latency;
657 else if ((packets < 10) || ((bytes/packets) > 1200))
658 retval = bulk_latency;
659 else if ((packets > 35))
660 retval = lowest_latency;
661 } else if (bytes/packets > 2000) {
662 retval = bulk_latency;
663 } else if (packets <= 2 && bytes < 512) {
664 retval = lowest_latency;
665 }
666 break;
667 case bulk_latency: /* 250 usec aka 4000 ints/s */
668 if (bytes > 25000) {
669 if (packets > 35)
670 retval = low_latency;
671 } else if (bytes < 6000) {
672 retval = low_latency;
673 }
674 break;
675 }
676
677 update_itr_done:
678 return retval;
679 }
680
681 static void igbvf_set_itr(struct igbvf_adapter *adapter)
682 {
683 struct e1000_hw *hw = &adapter->hw;
684 u16 current_itr;
685 u32 new_itr = adapter->itr;
686
687 adapter->tx_itr = igbvf_update_itr(adapter, adapter->tx_itr,
688 adapter->total_tx_packets,
689 adapter->total_tx_bytes);
690 /* conservative mode (itr 3) eliminates the lowest_latency setting */
691 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
692 adapter->tx_itr = low_latency;
693
694 adapter->rx_itr = igbvf_update_itr(adapter, adapter->rx_itr,
695 adapter->total_rx_packets,
696 adapter->total_rx_bytes);
697 /* conservative mode (itr 3) eliminates the lowest_latency setting */
698 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
699 adapter->rx_itr = low_latency;
700
701 current_itr = max(adapter->rx_itr, adapter->tx_itr);
702
703 switch (current_itr) {
704 /* counts and packets in update_itr are dependent on these numbers */
705 case lowest_latency:
706 new_itr = 70000;
707 break;
708 case low_latency:
709 new_itr = 20000; /* aka hwitr = ~200 */
710 break;
711 case bulk_latency:
712 new_itr = 4000;
713 break;
714 default:
715 break;
716 }
717
718 if (new_itr != adapter->itr) {
719 /*
720 * this attempts to bias the interrupt rate towards Bulk
721 * by adding intermediate steps when interrupt rate is
722 * increasing
723 */
724 new_itr = new_itr > adapter->itr ?
725 min(adapter->itr + (new_itr >> 2), new_itr) :
726 new_itr;
727 adapter->itr = new_itr;
728 adapter->rx_ring->itr_val = 1952;
729
730 if (adapter->msix_entries)
731 adapter->rx_ring->set_itr = 1;
732 else
733 ew32(ITR, 1952);
734 }
735 }
736
737 /**
738 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
739 * @adapter: board private structure
740 * returns true if ring is completely cleaned
741 **/
742 static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
743 {
744 struct igbvf_adapter *adapter = tx_ring->adapter;
745 struct net_device *netdev = adapter->netdev;
746 struct igbvf_buffer *buffer_info;
747 struct sk_buff *skb;
748 union e1000_adv_tx_desc *tx_desc, *eop_desc;
749 unsigned int total_bytes = 0, total_packets = 0;
750 unsigned int i, eop, count = 0;
751 bool cleaned = false;
752
753 i = tx_ring->next_to_clean;
754 eop = tx_ring->buffer_info[i].next_to_watch;
755 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
756
757 while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
758 (count < tx_ring->count)) {
759 rmb(); /* read buffer_info after eop_desc status */
760 for (cleaned = false; !cleaned; count++) {
761 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
762 buffer_info = &tx_ring->buffer_info[i];
763 cleaned = (i == eop);
764 skb = buffer_info->skb;
765
766 if (skb) {
767 unsigned int segs, bytecount;
768
769 /* gso_segs is currently only valid for tcp */
770 segs = skb_shinfo(skb)->gso_segs ?: 1;
771 /* multiply data chunks by size of headers */
772 bytecount = ((segs - 1) * skb_headlen(skb)) +
773 skb->len;
774 total_packets += segs;
775 total_bytes += bytecount;
776 }
777
778 igbvf_put_txbuf(adapter, buffer_info);
779 tx_desc->wb.status = 0;
780
781 i++;
782 if (i == tx_ring->count)
783 i = 0;
784 }
785 eop = tx_ring->buffer_info[i].next_to_watch;
786 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
787 }
788
789 tx_ring->next_to_clean = i;
790
791 if (unlikely(count &&
792 netif_carrier_ok(netdev) &&
793 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
794 /* Make sure that anybody stopping the queue after this
795 * sees the new next_to_clean.
796 */
797 smp_mb();
798 if (netif_queue_stopped(netdev) &&
799 !(test_bit(__IGBVF_DOWN, &adapter->state))) {
800 netif_wake_queue(netdev);
801 ++adapter->restart_queue;
802 }
803 }
804
805 adapter->net_stats.tx_bytes += total_bytes;
806 adapter->net_stats.tx_packets += total_packets;
807 return count < tx_ring->count;
808 }
809
810 static irqreturn_t igbvf_msix_other(int irq, void *data)
811 {
812 struct net_device *netdev = data;
813 struct igbvf_adapter *adapter = netdev_priv(netdev);
814 struct e1000_hw *hw = &adapter->hw;
815
816 adapter->int_counter1++;
817
818 netif_carrier_off(netdev);
819 hw->mac.get_link_status = 1;
820 if (!test_bit(__IGBVF_DOWN, &adapter->state))
821 mod_timer(&adapter->watchdog_timer, jiffies + 1);
822
823 ew32(EIMS, adapter->eims_other);
824
825 return IRQ_HANDLED;
826 }
827
828 static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
829 {
830 struct net_device *netdev = data;
831 struct igbvf_adapter *adapter = netdev_priv(netdev);
832 struct e1000_hw *hw = &adapter->hw;
833 struct igbvf_ring *tx_ring = adapter->tx_ring;
834
835
836 adapter->total_tx_bytes = 0;
837 adapter->total_tx_packets = 0;
838
839 /* auto mask will automatically reenable the interrupt when we write
840 * EICS */
841 if (!igbvf_clean_tx_irq(tx_ring))
842 /* Ring was not completely cleaned, so fire another interrupt */
843 ew32(EICS, tx_ring->eims_value);
844 else
845 ew32(EIMS, tx_ring->eims_value);
846
847 return IRQ_HANDLED;
848 }
849
850 static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
851 {
852 struct net_device *netdev = data;
853 struct igbvf_adapter *adapter = netdev_priv(netdev);
854
855 adapter->int_counter0++;
856
857 /* Write the ITR value calculated at the end of the
858 * previous interrupt.
859 */
860 if (adapter->rx_ring->set_itr) {
861 writel(adapter->rx_ring->itr_val,
862 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
863 adapter->rx_ring->set_itr = 0;
864 }
865
866 if (napi_schedule_prep(&adapter->rx_ring->napi)) {
867 adapter->total_rx_bytes = 0;
868 adapter->total_rx_packets = 0;
869 __napi_schedule(&adapter->rx_ring->napi);
870 }
871
872 return IRQ_HANDLED;
873 }
874
875 #define IGBVF_NO_QUEUE -1
876
877 static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
878 int tx_queue, int msix_vector)
879 {
880 struct e1000_hw *hw = &adapter->hw;
881 u32 ivar, index;
882
883 /* 82576 uses a table-based method for assigning vectors.
884 Each queue has a single entry in the table to which we write
885 a vector number along with a "valid" bit. Sadly, the layout
886 of the table is somewhat counterintuitive. */
887 if (rx_queue > IGBVF_NO_QUEUE) {
888 index = (rx_queue >> 1);
889 ivar = array_er32(IVAR0, index);
890 if (rx_queue & 0x1) {
891 /* vector goes into third byte of register */
892 ivar = ivar & 0xFF00FFFF;
893 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
894 } else {
895 /* vector goes into low byte of register */
896 ivar = ivar & 0xFFFFFF00;
897 ivar |= msix_vector | E1000_IVAR_VALID;
898 }
899 adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector;
900 array_ew32(IVAR0, index, ivar);
901 }
902 if (tx_queue > IGBVF_NO_QUEUE) {
903 index = (tx_queue >> 1);
904 ivar = array_er32(IVAR0, index);
905 if (tx_queue & 0x1) {
906 /* vector goes into high byte of register */
907 ivar = ivar & 0x00FFFFFF;
908 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
909 } else {
910 /* vector goes into second byte of register */
911 ivar = ivar & 0xFFFF00FF;
912 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
913 }
914 adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector;
915 array_ew32(IVAR0, index, ivar);
916 }
917 }
918
919 /**
920 * igbvf_configure_msix - Configure MSI-X hardware
921 *
922 * igbvf_configure_msix sets up the hardware to properly
923 * generate MSI-X interrupts.
924 **/
925 static void igbvf_configure_msix(struct igbvf_adapter *adapter)
926 {
927 u32 tmp;
928 struct e1000_hw *hw = &adapter->hw;
929 struct igbvf_ring *tx_ring = adapter->tx_ring;
930 struct igbvf_ring *rx_ring = adapter->rx_ring;
931 int vector = 0;
932
933 adapter->eims_enable_mask = 0;
934
935 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
936 adapter->eims_enable_mask |= tx_ring->eims_value;
937 if (tx_ring->itr_val)
938 writel(tx_ring->itr_val,
939 hw->hw_addr + tx_ring->itr_register);
940 else
941 writel(1952, hw->hw_addr + tx_ring->itr_register);
942
943 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
944 adapter->eims_enable_mask |= rx_ring->eims_value;
945 if (rx_ring->itr_val)
946 writel(rx_ring->itr_val,
947 hw->hw_addr + rx_ring->itr_register);
948 else
949 writel(1952, hw->hw_addr + rx_ring->itr_register);
950
951 /* set vector for other causes, i.e. link changes */
952
953 tmp = (vector++ | E1000_IVAR_VALID);
954
955 ew32(IVAR_MISC, tmp);
956
957 adapter->eims_enable_mask = (1 << (vector)) - 1;
958 adapter->eims_other = 1 << (vector - 1);
959 e1e_flush();
960 }
961
962 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
963 {
964 if (adapter->msix_entries) {
965 pci_disable_msix(adapter->pdev);
966 kfree(adapter->msix_entries);
967 adapter->msix_entries = NULL;
968 }
969 }
970
971 /**
972 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
973 *
974 * Attempt to configure interrupts using the best available
975 * capabilities of the hardware and kernel.
976 **/
977 static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
978 {
979 int err = -ENOMEM;
980 int i;
981
982 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
983 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
984 GFP_KERNEL);
985 if (adapter->msix_entries) {
986 for (i = 0; i < 3; i++)
987 adapter->msix_entries[i].entry = i;
988
989 err = pci_enable_msix(adapter->pdev,
990 adapter->msix_entries, 3);
991 }
992
993 if (err) {
994 /* MSI-X failed */
995 dev_err(&adapter->pdev->dev,
996 "Failed to initialize MSI-X interrupts.\n");
997 igbvf_reset_interrupt_capability(adapter);
998 }
999 }
1000
1001 /**
1002 * igbvf_request_msix - Initialize MSI-X interrupts
1003 *
1004 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1005 * kernel.
1006 **/
1007 static int igbvf_request_msix(struct igbvf_adapter *adapter)
1008 {
1009 struct net_device *netdev = adapter->netdev;
1010 int err = 0, vector = 0;
1011
1012 if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1013 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1014 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1015 } else {
1016 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1017 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1018 }
1019
1020 err = request_irq(adapter->msix_entries[vector].vector,
1021 igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1022 netdev);
1023 if (err)
1024 goto out;
1025
1026 adapter->tx_ring->itr_register = E1000_EITR(vector);
1027 adapter->tx_ring->itr_val = 1952;
1028 vector++;
1029
1030 err = request_irq(adapter->msix_entries[vector].vector,
1031 igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1032 netdev);
1033 if (err)
1034 goto out;
1035
1036 adapter->rx_ring->itr_register = E1000_EITR(vector);
1037 adapter->rx_ring->itr_val = 1952;
1038 vector++;
1039
1040 err = request_irq(adapter->msix_entries[vector].vector,
1041 igbvf_msix_other, 0, netdev->name, netdev);
1042 if (err)
1043 goto out;
1044
1045 igbvf_configure_msix(adapter);
1046 return 0;
1047 out:
1048 return err;
1049 }
1050
1051 /**
1052 * igbvf_alloc_queues - Allocate memory for all rings
1053 * @adapter: board private structure to initialize
1054 **/
1055 static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter)
1056 {
1057 struct net_device *netdev = adapter->netdev;
1058
1059 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1060 if (!adapter->tx_ring)
1061 return -ENOMEM;
1062
1063 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1064 if (!adapter->rx_ring) {
1065 kfree(adapter->tx_ring);
1066 return -ENOMEM;
1067 }
1068
1069 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1070
1071 return 0;
1072 }
1073
1074 /**
1075 * igbvf_request_irq - initialize interrupts
1076 *
1077 * Attempts to configure interrupts using the best available
1078 * capabilities of the hardware and kernel.
1079 **/
1080 static int igbvf_request_irq(struct igbvf_adapter *adapter)
1081 {
1082 int err = -1;
1083
1084 /* igbvf supports msi-x only */
1085 if (adapter->msix_entries)
1086 err = igbvf_request_msix(adapter);
1087
1088 if (!err)
1089 return err;
1090
1091 dev_err(&adapter->pdev->dev,
1092 "Unable to allocate interrupt, Error: %d\n", err);
1093
1094 return err;
1095 }
1096
1097 static void igbvf_free_irq(struct igbvf_adapter *adapter)
1098 {
1099 struct net_device *netdev = adapter->netdev;
1100 int vector;
1101
1102 if (adapter->msix_entries) {
1103 for (vector = 0; vector < 3; vector++)
1104 free_irq(adapter->msix_entries[vector].vector, netdev);
1105 }
1106 }
1107
1108 /**
1109 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1110 **/
1111 static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1112 {
1113 struct e1000_hw *hw = &adapter->hw;
1114
1115 ew32(EIMC, ~0);
1116
1117 if (adapter->msix_entries)
1118 ew32(EIAC, 0);
1119 }
1120
1121 /**
1122 * igbvf_irq_enable - Enable default interrupt generation settings
1123 **/
1124 static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1125 {
1126 struct e1000_hw *hw = &adapter->hw;
1127
1128 ew32(EIAC, adapter->eims_enable_mask);
1129 ew32(EIAM, adapter->eims_enable_mask);
1130 ew32(EIMS, adapter->eims_enable_mask);
1131 }
1132
1133 /**
1134 * igbvf_poll - NAPI Rx polling callback
1135 * @napi: struct associated with this polling callback
1136 * @budget: amount of packets driver is allowed to process this poll
1137 **/
1138 static int igbvf_poll(struct napi_struct *napi, int budget)
1139 {
1140 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1141 struct igbvf_adapter *adapter = rx_ring->adapter;
1142 struct e1000_hw *hw = &adapter->hw;
1143 int work_done = 0;
1144
1145 igbvf_clean_rx_irq(adapter, &work_done, budget);
1146
1147 /* If not enough Rx work done, exit the polling mode */
1148 if (work_done < budget) {
1149 napi_complete(napi);
1150
1151 if (adapter->itr_setting & 3)
1152 igbvf_set_itr(adapter);
1153
1154 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1155 ew32(EIMS, adapter->rx_ring->eims_value);
1156 }
1157
1158 return work_done;
1159 }
1160
1161 /**
1162 * igbvf_set_rlpml - set receive large packet maximum length
1163 * @adapter: board private structure
1164 *
1165 * Configure the maximum size of packets that will be received
1166 */
1167 static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1168 {
1169 int max_frame_size = adapter->max_frame_size;
1170 struct e1000_hw *hw = &adapter->hw;
1171
1172 if (adapter->vlgrp)
1173 max_frame_size += VLAN_TAG_SIZE;
1174
1175 e1000_rlpml_set_vf(hw, max_frame_size);
1176 }
1177
1178 static void igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1179 {
1180 struct igbvf_adapter *adapter = netdev_priv(netdev);
1181 struct e1000_hw *hw = &adapter->hw;
1182
1183 if (hw->mac.ops.set_vfta(hw, vid, true))
1184 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
1185 }
1186
1187 static void igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1188 {
1189 struct igbvf_adapter *adapter = netdev_priv(netdev);
1190 struct e1000_hw *hw = &adapter->hw;
1191
1192 igbvf_irq_disable(adapter);
1193 vlan_group_set_device(adapter->vlgrp, vid, NULL);
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 }
1202
1203 static void igbvf_vlan_rx_register(struct net_device *netdev,
1204 struct vlan_group *grp)
1205 {
1206 struct igbvf_adapter *adapter = netdev_priv(netdev);
1207
1208 adapter->vlgrp = grp;
1209 }
1210
1211 static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1212 {
1213 u16 vid;
1214
1215 if (!adapter->vlgrp)
1216 return;
1217
1218 for (vid = 0; vid < VLAN_N_VID; vid++) {
1219 if (!vlan_group_get_device(adapter->vlgrp, vid))
1220 continue;
1221 igbvf_vlan_rx_add_vid(adapter->netdev, vid);
1222 }
1223
1224 igbvf_set_rlpml(adapter);
1225 }
1226
1227 /**
1228 * igbvf_configure_tx - Configure Transmit Unit after Reset
1229 * @adapter: board private structure
1230 *
1231 * Configure the Tx unit of the MAC after a reset.
1232 **/
1233 static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1234 {
1235 struct e1000_hw *hw = &adapter->hw;
1236 struct igbvf_ring *tx_ring = adapter->tx_ring;
1237 u64 tdba;
1238 u32 txdctl, dca_txctrl;
1239
1240 /* disable transmits */
1241 txdctl = er32(TXDCTL(0));
1242 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1243 msleep(10);
1244
1245 /* Setup the HW Tx Head and Tail descriptor pointers */
1246 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1247 tdba = tx_ring->dma;
1248 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1249 ew32(TDBAH(0), (tdba >> 32));
1250 ew32(TDH(0), 0);
1251 ew32(TDT(0), 0);
1252 tx_ring->head = E1000_TDH(0);
1253 tx_ring->tail = E1000_TDT(0);
1254
1255 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1256 * MUST be delivered in order or it will completely screw up
1257 * our bookeeping.
1258 */
1259 dca_txctrl = er32(DCA_TXCTRL(0));
1260 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1261 ew32(DCA_TXCTRL(0), dca_txctrl);
1262
1263 /* enable transmits */
1264 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1265 ew32(TXDCTL(0), txdctl);
1266
1267 /* Setup Transmit Descriptor Settings for eop descriptor */
1268 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1269
1270 /* enable Report Status bit */
1271 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1272 }
1273
1274 /**
1275 * igbvf_setup_srrctl - configure the receive control registers
1276 * @adapter: Board private structure
1277 **/
1278 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1279 {
1280 struct e1000_hw *hw = &adapter->hw;
1281 u32 srrctl = 0;
1282
1283 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1284 E1000_SRRCTL_BSIZEHDR_MASK |
1285 E1000_SRRCTL_BSIZEPKT_MASK);
1286
1287 /* Enable queue drop to avoid head of line blocking */
1288 srrctl |= E1000_SRRCTL_DROP_EN;
1289
1290 /* Setup buffer sizes */
1291 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1292 E1000_SRRCTL_BSIZEPKT_SHIFT;
1293
1294 if (adapter->rx_buffer_len < 2048) {
1295 adapter->rx_ps_hdr_size = 0;
1296 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1297 } else {
1298 adapter->rx_ps_hdr_size = 128;
1299 srrctl |= adapter->rx_ps_hdr_size <<
1300 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1301 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1302 }
1303
1304 ew32(SRRCTL(0), srrctl);
1305 }
1306
1307 /**
1308 * igbvf_configure_rx - Configure Receive Unit after Reset
1309 * @adapter: board private structure
1310 *
1311 * Configure the Rx unit of the MAC after a reset.
1312 **/
1313 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1314 {
1315 struct e1000_hw *hw = &adapter->hw;
1316 struct igbvf_ring *rx_ring = adapter->rx_ring;
1317 u64 rdba;
1318 u32 rdlen, rxdctl;
1319
1320 /* disable receives */
1321 rxdctl = er32(RXDCTL(0));
1322 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1323 msleep(10);
1324
1325 rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc);
1326
1327 /*
1328 * Setup the HW Rx Head and Tail Descriptor Pointers and
1329 * the Base and Length of the Rx Descriptor Ring
1330 */
1331 rdba = rx_ring->dma;
1332 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1333 ew32(RDBAH(0), (rdba >> 32));
1334 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1335 rx_ring->head = E1000_RDH(0);
1336 rx_ring->tail = E1000_RDT(0);
1337 ew32(RDH(0), 0);
1338 ew32(RDT(0), 0);
1339
1340 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1341 rxdctl &= 0xFFF00000;
1342 rxdctl |= IGBVF_RX_PTHRESH;
1343 rxdctl |= IGBVF_RX_HTHRESH << 8;
1344 rxdctl |= IGBVF_RX_WTHRESH << 16;
1345
1346 igbvf_set_rlpml(adapter);
1347
1348 /* enable receives */
1349 ew32(RXDCTL(0), rxdctl);
1350 }
1351
1352 /**
1353 * igbvf_set_multi - Multicast and Promiscuous mode set
1354 * @netdev: network interface device structure
1355 *
1356 * The set_multi entry point is called whenever the multicast address
1357 * list or the network interface flags are updated. This routine is
1358 * responsible for configuring the hardware for proper multicast,
1359 * promiscuous mode, and all-multi behavior.
1360 **/
1361 static void igbvf_set_multi(struct net_device *netdev)
1362 {
1363 struct igbvf_adapter *adapter = netdev_priv(netdev);
1364 struct e1000_hw *hw = &adapter->hw;
1365 struct netdev_hw_addr *ha;
1366 u8 *mta_list = NULL;
1367 int i;
1368
1369 if (!netdev_mc_empty(netdev)) {
1370 mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
1371 if (!mta_list) {
1372 dev_err(&adapter->pdev->dev,
1373 "failed to allocate multicast filter list\n");
1374 return;
1375 }
1376 }
1377
1378 /* prepare a packed array of only addresses. */
1379 i = 0;
1380 netdev_for_each_mc_addr(ha, netdev)
1381 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
1382
1383 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1384 kfree(mta_list);
1385 }
1386
1387 /**
1388 * igbvf_configure - configure the hardware for Rx and Tx
1389 * @adapter: private board structure
1390 **/
1391 static void igbvf_configure(struct igbvf_adapter *adapter)
1392 {
1393 igbvf_set_multi(adapter->netdev);
1394
1395 igbvf_restore_vlan(adapter);
1396
1397 igbvf_configure_tx(adapter);
1398 igbvf_setup_srrctl(adapter);
1399 igbvf_configure_rx(adapter);
1400 igbvf_alloc_rx_buffers(adapter->rx_ring,
1401 igbvf_desc_unused(adapter->rx_ring));
1402 }
1403
1404 /* igbvf_reset - bring the hardware into a known good state
1405 *
1406 * This function boots the hardware and enables some settings that
1407 * require a configuration cycle of the hardware - those cannot be
1408 * set/changed during runtime. After reset the device needs to be
1409 * properly configured for Rx, Tx etc.
1410 */
1411 static void igbvf_reset(struct igbvf_adapter *adapter)
1412 {
1413 struct e1000_mac_info *mac = &adapter->hw.mac;
1414 struct net_device *netdev = adapter->netdev;
1415 struct e1000_hw *hw = &adapter->hw;
1416
1417 /* Allow time for pending master requests to run */
1418 if (mac->ops.reset_hw(hw))
1419 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1420
1421 mac->ops.init_hw(hw);
1422
1423 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1424 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1425 netdev->addr_len);
1426 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1427 netdev->addr_len);
1428 }
1429
1430 adapter->last_reset = jiffies;
1431 }
1432
1433 int igbvf_up(struct igbvf_adapter *adapter)
1434 {
1435 struct e1000_hw *hw = &adapter->hw;
1436
1437 /* hardware has been reset, we need to reload some things */
1438 igbvf_configure(adapter);
1439
1440 clear_bit(__IGBVF_DOWN, &adapter->state);
1441
1442 napi_enable(&adapter->rx_ring->napi);
1443 if (adapter->msix_entries)
1444 igbvf_configure_msix(adapter);
1445
1446 /* Clear any pending interrupts. */
1447 er32(EICR);
1448 igbvf_irq_enable(adapter);
1449
1450 /* start the watchdog */
1451 hw->mac.get_link_status = 1;
1452 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1453
1454
1455 return 0;
1456 }
1457
1458 void igbvf_down(struct igbvf_adapter *adapter)
1459 {
1460 struct net_device *netdev = adapter->netdev;
1461 struct e1000_hw *hw = &adapter->hw;
1462 u32 rxdctl, txdctl;
1463
1464 /*
1465 * signal that we're down so the interrupt handler does not
1466 * reschedule our watchdog timer
1467 */
1468 set_bit(__IGBVF_DOWN, &adapter->state);
1469
1470 /* disable receives in the hardware */
1471 rxdctl = er32(RXDCTL(0));
1472 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1473
1474 netif_stop_queue(netdev);
1475
1476 /* disable transmits in the hardware */
1477 txdctl = er32(TXDCTL(0));
1478 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1479
1480 /* flush both disables and wait for them to finish */
1481 e1e_flush();
1482 msleep(10);
1483
1484 napi_disable(&adapter->rx_ring->napi);
1485
1486 igbvf_irq_disable(adapter);
1487
1488 del_timer_sync(&adapter->watchdog_timer);
1489
1490 netif_carrier_off(netdev);
1491
1492 /* record the stats before reset*/
1493 igbvf_update_stats(adapter);
1494
1495 adapter->link_speed = 0;
1496 adapter->link_duplex = 0;
1497
1498 igbvf_reset(adapter);
1499 igbvf_clean_tx_ring(adapter->tx_ring);
1500 igbvf_clean_rx_ring(adapter->rx_ring);
1501 }
1502
1503 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1504 {
1505 might_sleep();
1506 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1507 msleep(1);
1508 igbvf_down(adapter);
1509 igbvf_up(adapter);
1510 clear_bit(__IGBVF_RESETTING, &adapter->state);
1511 }
1512
1513 /**
1514 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1515 * @adapter: board private structure to initialize
1516 *
1517 * igbvf_sw_init initializes the Adapter private data structure.
1518 * Fields are initialized based on PCI device information and
1519 * OS network device settings (MTU size).
1520 **/
1521 static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter)
1522 {
1523 struct net_device *netdev = adapter->netdev;
1524 s32 rc;
1525
1526 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1527 adapter->rx_ps_hdr_size = 0;
1528 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1529 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1530
1531 adapter->tx_int_delay = 8;
1532 adapter->tx_abs_int_delay = 32;
1533 adapter->rx_int_delay = 0;
1534 adapter->rx_abs_int_delay = 8;
1535 adapter->itr_setting = 3;
1536 adapter->itr = 20000;
1537
1538 /* Set various function pointers */
1539 adapter->ei->init_ops(&adapter->hw);
1540
1541 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1542 if (rc)
1543 return rc;
1544
1545 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1546 if (rc)
1547 return rc;
1548
1549 igbvf_set_interrupt_capability(adapter);
1550
1551 if (igbvf_alloc_queues(adapter))
1552 return -ENOMEM;
1553
1554 spin_lock_init(&adapter->tx_queue_lock);
1555
1556 /* Explicitly disable IRQ since the NIC can be in any state. */
1557 igbvf_irq_disable(adapter);
1558
1559 spin_lock_init(&adapter->stats_lock);
1560
1561 set_bit(__IGBVF_DOWN, &adapter->state);
1562 return 0;
1563 }
1564
1565 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1566 {
1567 struct e1000_hw *hw = &adapter->hw;
1568
1569 adapter->stats.last_gprc = er32(VFGPRC);
1570 adapter->stats.last_gorc = er32(VFGORC);
1571 adapter->stats.last_gptc = er32(VFGPTC);
1572 adapter->stats.last_gotc = er32(VFGOTC);
1573 adapter->stats.last_mprc = er32(VFMPRC);
1574 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1575 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1576 adapter->stats.last_gorlbc = er32(VFGORLBC);
1577 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1578
1579 adapter->stats.base_gprc = er32(VFGPRC);
1580 adapter->stats.base_gorc = er32(VFGORC);
1581 adapter->stats.base_gptc = er32(VFGPTC);
1582 adapter->stats.base_gotc = er32(VFGOTC);
1583 adapter->stats.base_mprc = er32(VFMPRC);
1584 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1585 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1586 adapter->stats.base_gorlbc = er32(VFGORLBC);
1587 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1588 }
1589
1590 /**
1591 * igbvf_open - Called when a network interface is made active
1592 * @netdev: network interface device structure
1593 *
1594 * Returns 0 on success, negative value on failure
1595 *
1596 * The open entry point is called when a network interface is made
1597 * active by the system (IFF_UP). At this point all resources needed
1598 * for transmit and receive operations are allocated, the interrupt
1599 * handler is registered with the OS, the watchdog timer is started,
1600 * and the stack is notified that the interface is ready.
1601 **/
1602 static int igbvf_open(struct net_device *netdev)
1603 {
1604 struct igbvf_adapter *adapter = netdev_priv(netdev);
1605 struct e1000_hw *hw = &adapter->hw;
1606 int err;
1607
1608 /* disallow open during test */
1609 if (test_bit(__IGBVF_TESTING, &adapter->state))
1610 return -EBUSY;
1611
1612 /* allocate transmit descriptors */
1613 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1614 if (err)
1615 goto err_setup_tx;
1616
1617 /* allocate receive descriptors */
1618 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1619 if (err)
1620 goto err_setup_rx;
1621
1622 /*
1623 * before we allocate an interrupt, we must be ready to handle it.
1624 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1625 * as soon as we call pci_request_irq, so we have to setup our
1626 * clean_rx handler before we do so.
1627 */
1628 igbvf_configure(adapter);
1629
1630 err = igbvf_request_irq(adapter);
1631 if (err)
1632 goto err_req_irq;
1633
1634 /* From here on the code is the same as igbvf_up() */
1635 clear_bit(__IGBVF_DOWN, &adapter->state);
1636
1637 napi_enable(&adapter->rx_ring->napi);
1638
1639 /* clear any pending interrupts */
1640 er32(EICR);
1641
1642 igbvf_irq_enable(adapter);
1643
1644 /* start the watchdog */
1645 hw->mac.get_link_status = 1;
1646 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1647
1648 return 0;
1649
1650 err_req_irq:
1651 igbvf_free_rx_resources(adapter->rx_ring);
1652 err_setup_rx:
1653 igbvf_free_tx_resources(adapter->tx_ring);
1654 err_setup_tx:
1655 igbvf_reset(adapter);
1656
1657 return err;
1658 }
1659
1660 /**
1661 * igbvf_close - Disables a network interface
1662 * @netdev: network interface device structure
1663 *
1664 * Returns 0, this is not allowed to fail
1665 *
1666 * The close entry point is called when an interface is de-activated
1667 * by the OS. The hardware is still under the drivers control, but
1668 * needs to be disabled. A global MAC reset is issued to stop the
1669 * hardware, and all transmit and receive resources are freed.
1670 **/
1671 static int igbvf_close(struct net_device *netdev)
1672 {
1673 struct igbvf_adapter *adapter = netdev_priv(netdev);
1674
1675 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1676 igbvf_down(adapter);
1677
1678 igbvf_free_irq(adapter);
1679
1680 igbvf_free_tx_resources(adapter->tx_ring);
1681 igbvf_free_rx_resources(adapter->rx_ring);
1682
1683 return 0;
1684 }
1685 /**
1686 * igbvf_set_mac - Change the Ethernet Address of the NIC
1687 * @netdev: network interface device structure
1688 * @p: pointer to an address structure
1689 *
1690 * Returns 0 on success, negative on failure
1691 **/
1692 static int igbvf_set_mac(struct net_device *netdev, void *p)
1693 {
1694 struct igbvf_adapter *adapter = netdev_priv(netdev);
1695 struct e1000_hw *hw = &adapter->hw;
1696 struct sockaddr *addr = p;
1697
1698 if (!is_valid_ether_addr(addr->sa_data))
1699 return -EADDRNOTAVAIL;
1700
1701 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1702
1703 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1704
1705 if (memcmp(addr->sa_data, hw->mac.addr, 6))
1706 return -EADDRNOTAVAIL;
1707
1708 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1709
1710 return 0;
1711 }
1712
1713 #define UPDATE_VF_COUNTER(reg, name) \
1714 { \
1715 u32 current_counter = er32(reg); \
1716 if (current_counter < adapter->stats.last_##name) \
1717 adapter->stats.name += 0x100000000LL; \
1718 adapter->stats.last_##name = current_counter; \
1719 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1720 adapter->stats.name |= current_counter; \
1721 }
1722
1723 /**
1724 * igbvf_update_stats - Update the board statistics counters
1725 * @adapter: board private structure
1726 **/
1727 void igbvf_update_stats(struct igbvf_adapter *adapter)
1728 {
1729 struct e1000_hw *hw = &adapter->hw;
1730 struct pci_dev *pdev = adapter->pdev;
1731
1732 /*
1733 * Prevent stats update while adapter is being reset, link is down
1734 * or if the pci connection is down.
1735 */
1736 if (adapter->link_speed == 0)
1737 return;
1738
1739 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1740 return;
1741
1742 if (pci_channel_offline(pdev))
1743 return;
1744
1745 UPDATE_VF_COUNTER(VFGPRC, gprc);
1746 UPDATE_VF_COUNTER(VFGORC, gorc);
1747 UPDATE_VF_COUNTER(VFGPTC, gptc);
1748 UPDATE_VF_COUNTER(VFGOTC, gotc);
1749 UPDATE_VF_COUNTER(VFMPRC, mprc);
1750 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1751 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1752 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1753 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1754
1755 /* Fill out the OS statistics structure */
1756 adapter->net_stats.multicast = adapter->stats.mprc;
1757 }
1758
1759 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1760 {
1761 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s\n",
1762 adapter->link_speed,
1763 ((adapter->link_duplex == FULL_DUPLEX) ?
1764 "Full Duplex" : "Half Duplex"));
1765 }
1766
1767 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1768 {
1769 struct e1000_hw *hw = &adapter->hw;
1770 s32 ret_val = E1000_SUCCESS;
1771 bool link_active;
1772
1773 /* If interface is down, stay link down */
1774 if (test_bit(__IGBVF_DOWN, &adapter->state))
1775 return false;
1776
1777 ret_val = hw->mac.ops.check_for_link(hw);
1778 link_active = !hw->mac.get_link_status;
1779
1780 /* if check for link returns error we will need to reset */
1781 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1782 schedule_work(&adapter->reset_task);
1783
1784 return link_active;
1785 }
1786
1787 /**
1788 * igbvf_watchdog - Timer Call-back
1789 * @data: pointer to adapter cast into an unsigned long
1790 **/
1791 static void igbvf_watchdog(unsigned long data)
1792 {
1793 struct igbvf_adapter *adapter = (struct igbvf_adapter *) data;
1794
1795 /* Do the rest outside of interrupt context */
1796 schedule_work(&adapter->watchdog_task);
1797 }
1798
1799 static void igbvf_watchdog_task(struct work_struct *work)
1800 {
1801 struct igbvf_adapter *adapter = container_of(work,
1802 struct igbvf_adapter,
1803 watchdog_task);
1804 struct net_device *netdev = adapter->netdev;
1805 struct e1000_mac_info *mac = &adapter->hw.mac;
1806 struct igbvf_ring *tx_ring = adapter->tx_ring;
1807 struct e1000_hw *hw = &adapter->hw;
1808 u32 link;
1809 int tx_pending = 0;
1810
1811 link = igbvf_has_link(adapter);
1812
1813 if (link) {
1814 if (!netif_carrier_ok(netdev)) {
1815 mac->ops.get_link_up_info(&adapter->hw,
1816 &adapter->link_speed,
1817 &adapter->link_duplex);
1818 igbvf_print_link_info(adapter);
1819
1820 netif_carrier_on(netdev);
1821 netif_wake_queue(netdev);
1822 }
1823 } else {
1824 if (netif_carrier_ok(netdev)) {
1825 adapter->link_speed = 0;
1826 adapter->link_duplex = 0;
1827 dev_info(&adapter->pdev->dev, "Link is Down\n");
1828 netif_carrier_off(netdev);
1829 netif_stop_queue(netdev);
1830 }
1831 }
1832
1833 if (netif_carrier_ok(netdev)) {
1834 igbvf_update_stats(adapter);
1835 } else {
1836 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1837 tx_ring->count);
1838 if (tx_pending) {
1839 /*
1840 * We've lost link, so the controller stops DMA,
1841 * but we've got queued Tx work that's never going
1842 * to get done, so reset controller to flush Tx.
1843 * (Do the reset outside of interrupt context).
1844 */
1845 adapter->tx_timeout_count++;
1846 schedule_work(&adapter->reset_task);
1847 }
1848 }
1849
1850 /* Cause software interrupt to ensure Rx ring is cleaned */
1851 ew32(EICS, adapter->rx_ring->eims_value);
1852
1853 /* Reset the timer */
1854 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1855 mod_timer(&adapter->watchdog_timer,
1856 round_jiffies(jiffies + (2 * HZ)));
1857 }
1858
1859 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1860 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1861 #define IGBVF_TX_FLAGS_TSO 0x00000004
1862 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1863 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1864 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1865
1866 static int igbvf_tso(struct igbvf_adapter *adapter,
1867 struct igbvf_ring *tx_ring,
1868 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
1869 {
1870 struct e1000_adv_tx_context_desc *context_desc;
1871 unsigned int i;
1872 int err;
1873 struct igbvf_buffer *buffer_info;
1874 u32 info = 0, tu_cmd = 0;
1875 u32 mss_l4len_idx, l4len;
1876 *hdr_len = 0;
1877
1878 if (skb_header_cloned(skb)) {
1879 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1880 if (err) {
1881 dev_err(&adapter->pdev->dev,
1882 "igbvf_tso returning an error\n");
1883 return err;
1884 }
1885 }
1886
1887 l4len = tcp_hdrlen(skb);
1888 *hdr_len += l4len;
1889
1890 if (skb->protocol == htons(ETH_P_IP)) {
1891 struct iphdr *iph = ip_hdr(skb);
1892 iph->tot_len = 0;
1893 iph->check = 0;
1894 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1895 iph->daddr, 0,
1896 IPPROTO_TCP,
1897 0);
1898 } else if (skb_is_gso_v6(skb)) {
1899 ipv6_hdr(skb)->payload_len = 0;
1900 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
1901 &ipv6_hdr(skb)->daddr,
1902 0, IPPROTO_TCP, 0);
1903 }
1904
1905 i = tx_ring->next_to_use;
1906
1907 buffer_info = &tx_ring->buffer_info[i];
1908 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1909 /* VLAN MACLEN IPLEN */
1910 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1911 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1912 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1913 *hdr_len += skb_network_offset(skb);
1914 info |= (skb_transport_header(skb) - skb_network_header(skb));
1915 *hdr_len += (skb_transport_header(skb) - skb_network_header(skb));
1916 context_desc->vlan_macip_lens = cpu_to_le32(info);
1917
1918 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1919 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1920
1921 if (skb->protocol == htons(ETH_P_IP))
1922 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1923 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1924
1925 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1926
1927 /* MSS L4LEN IDX */
1928 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
1929 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
1930
1931 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1932 context_desc->seqnum_seed = 0;
1933
1934 buffer_info->time_stamp = jiffies;
1935 buffer_info->next_to_watch = i;
1936 buffer_info->dma = 0;
1937 i++;
1938 if (i == tx_ring->count)
1939 i = 0;
1940
1941 tx_ring->next_to_use = i;
1942
1943 return true;
1944 }
1945
1946 static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter,
1947 struct igbvf_ring *tx_ring,
1948 struct sk_buff *skb, u32 tx_flags)
1949 {
1950 struct e1000_adv_tx_context_desc *context_desc;
1951 unsigned int i;
1952 struct igbvf_buffer *buffer_info;
1953 u32 info = 0, tu_cmd = 0;
1954
1955 if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
1956 (tx_flags & IGBVF_TX_FLAGS_VLAN)) {
1957 i = tx_ring->next_to_use;
1958 buffer_info = &tx_ring->buffer_info[i];
1959 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1960
1961 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1962 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1963
1964 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1965 if (skb->ip_summed == CHECKSUM_PARTIAL)
1966 info |= (skb_transport_header(skb) -
1967 skb_network_header(skb));
1968
1969
1970 context_desc->vlan_macip_lens = cpu_to_le32(info);
1971
1972 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1973
1974 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1975 switch (skb->protocol) {
1976 case __constant_htons(ETH_P_IP):
1977 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1978 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1979 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1980 break;
1981 case __constant_htons(ETH_P_IPV6):
1982 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1983 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1984 break;
1985 default:
1986 break;
1987 }
1988 }
1989
1990 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1991 context_desc->seqnum_seed = 0;
1992 context_desc->mss_l4len_idx = 0;
1993
1994 buffer_info->time_stamp = jiffies;
1995 buffer_info->next_to_watch = i;
1996 buffer_info->dma = 0;
1997 i++;
1998 if (i == tx_ring->count)
1999 i = 0;
2000 tx_ring->next_to_use = i;
2001
2002 return true;
2003 }
2004
2005 return false;
2006 }
2007
2008 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2009 {
2010 struct igbvf_adapter *adapter = netdev_priv(netdev);
2011
2012 /* there is enough descriptors then we don't need to worry */
2013 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2014 return 0;
2015
2016 netif_stop_queue(netdev);
2017
2018 smp_mb();
2019
2020 /* We need to check again just in case room has been made available */
2021 if (igbvf_desc_unused(adapter->tx_ring) < size)
2022 return -EBUSY;
2023
2024 netif_wake_queue(netdev);
2025
2026 ++adapter->restart_queue;
2027 return 0;
2028 }
2029
2030 #define IGBVF_MAX_TXD_PWR 16
2031 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2032
2033 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2034 struct igbvf_ring *tx_ring,
2035 struct sk_buff *skb,
2036 unsigned int first)
2037 {
2038 struct igbvf_buffer *buffer_info;
2039 struct pci_dev *pdev = adapter->pdev;
2040 unsigned int len = skb_headlen(skb);
2041 unsigned int count = 0, i;
2042 unsigned int f;
2043
2044 i = tx_ring->next_to_use;
2045
2046 buffer_info = &tx_ring->buffer_info[i];
2047 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2048 buffer_info->length = len;
2049 /* set time_stamp *before* dma to help avoid a possible race */
2050 buffer_info->time_stamp = jiffies;
2051 buffer_info->next_to_watch = i;
2052 buffer_info->mapped_as_page = false;
2053 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2054 DMA_TO_DEVICE);
2055 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2056 goto dma_error;
2057
2058
2059 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2060 struct skb_frag_struct *frag;
2061
2062 count++;
2063 i++;
2064 if (i == tx_ring->count)
2065 i = 0;
2066
2067 frag = &skb_shinfo(skb)->frags[f];
2068 len = frag->size;
2069
2070 buffer_info = &tx_ring->buffer_info[i];
2071 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2072 buffer_info->length = len;
2073 buffer_info->time_stamp = jiffies;
2074 buffer_info->next_to_watch = i;
2075 buffer_info->mapped_as_page = true;
2076 buffer_info->dma = dma_map_page(&pdev->dev,
2077 frag->page,
2078 frag->page_offset,
2079 len,
2080 DMA_TO_DEVICE);
2081 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2082 goto dma_error;
2083 }
2084
2085 tx_ring->buffer_info[i].skb = skb;
2086 tx_ring->buffer_info[first].next_to_watch = i;
2087
2088 return ++count;
2089
2090 dma_error:
2091 dev_err(&pdev->dev, "TX DMA map failed\n");
2092
2093 /* clear timestamp and dma mappings for failed buffer_info mapping */
2094 buffer_info->dma = 0;
2095 buffer_info->time_stamp = 0;
2096 buffer_info->length = 0;
2097 buffer_info->next_to_watch = 0;
2098 buffer_info->mapped_as_page = false;
2099 if (count)
2100 count--;
2101
2102 /* clear timestamp and dma mappings for remaining portion of packet */
2103 while (count--) {
2104 if (i==0)
2105 i += tx_ring->count;
2106 i--;
2107 buffer_info = &tx_ring->buffer_info[i];
2108 igbvf_put_txbuf(adapter, buffer_info);
2109 }
2110
2111 return 0;
2112 }
2113
2114 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2115 struct igbvf_ring *tx_ring,
2116 int tx_flags, int count, u32 paylen,
2117 u8 hdr_len)
2118 {
2119 union e1000_adv_tx_desc *tx_desc = NULL;
2120 struct igbvf_buffer *buffer_info;
2121 u32 olinfo_status = 0, cmd_type_len;
2122 unsigned int i;
2123
2124 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2125 E1000_ADVTXD_DCMD_DEXT);
2126
2127 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2128 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2129
2130 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2131 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2132
2133 /* insert tcp checksum */
2134 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2135
2136 /* insert ip checksum */
2137 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2138 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2139
2140 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2141 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2142 }
2143
2144 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2145
2146 i = tx_ring->next_to_use;
2147 while (count--) {
2148 buffer_info = &tx_ring->buffer_info[i];
2149 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2150 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2151 tx_desc->read.cmd_type_len =
2152 cpu_to_le32(cmd_type_len | buffer_info->length);
2153 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2154 i++;
2155 if (i == tx_ring->count)
2156 i = 0;
2157 }
2158
2159 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2160 /* Force memory writes to complete before letting h/w
2161 * know there are new descriptors to fetch. (Only
2162 * applicable for weak-ordered memory model archs,
2163 * such as IA-64). */
2164 wmb();
2165
2166 tx_ring->next_to_use = i;
2167 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2168 /* we need this if more than one processor can write to our tail
2169 * at a time, it syncronizes IO on IA64/Altix systems */
2170 mmiowb();
2171 }
2172
2173 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2174 struct net_device *netdev,
2175 struct igbvf_ring *tx_ring)
2176 {
2177 struct igbvf_adapter *adapter = netdev_priv(netdev);
2178 unsigned int first, tx_flags = 0;
2179 u8 hdr_len = 0;
2180 int count = 0;
2181 int tso = 0;
2182
2183 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2184 dev_kfree_skb_any(skb);
2185 return NETDEV_TX_OK;
2186 }
2187
2188 if (skb->len <= 0) {
2189 dev_kfree_skb_any(skb);
2190 return NETDEV_TX_OK;
2191 }
2192
2193 /*
2194 * need: count + 4 desc gap to keep tail from touching
2195 * + 2 desc gap to keep tail from touching head,
2196 * + 1 desc for skb->data,
2197 * + 1 desc for context descriptor,
2198 * head, otherwise try next time
2199 */
2200 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2201 /* this is a hard error */
2202 return NETDEV_TX_BUSY;
2203 }
2204
2205 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
2206 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2207 tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT);
2208 }
2209
2210 if (skb->protocol == htons(ETH_P_IP))
2211 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2212
2213 first = tx_ring->next_to_use;
2214
2215 tso = skb_is_gso(skb) ?
2216 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0;
2217 if (unlikely(tso < 0)) {
2218 dev_kfree_skb_any(skb);
2219 return NETDEV_TX_OK;
2220 }
2221
2222 if (tso)
2223 tx_flags |= IGBVF_TX_FLAGS_TSO;
2224 else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
2225 (skb->ip_summed == CHECKSUM_PARTIAL))
2226 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2227
2228 /*
2229 * count reflects descriptors mapped, if 0 then mapping error
2230 * has occurred and we need to rewind the descriptor queue
2231 */
2232 count = igbvf_tx_map_adv(adapter, tx_ring, skb, first);
2233
2234 if (count) {
2235 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2236 skb->len, hdr_len);
2237 /* Make sure there is space in the ring for the next send. */
2238 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2239 } else {
2240 dev_kfree_skb_any(skb);
2241 tx_ring->buffer_info[first].time_stamp = 0;
2242 tx_ring->next_to_use = first;
2243 }
2244
2245 return NETDEV_TX_OK;
2246 }
2247
2248 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2249 struct net_device *netdev)
2250 {
2251 struct igbvf_adapter *adapter = netdev_priv(netdev);
2252 struct igbvf_ring *tx_ring;
2253
2254 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2255 dev_kfree_skb_any(skb);
2256 return NETDEV_TX_OK;
2257 }
2258
2259 tx_ring = &adapter->tx_ring[0];
2260
2261 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2262 }
2263
2264 /**
2265 * igbvf_tx_timeout - Respond to a Tx Hang
2266 * @netdev: network interface device structure
2267 **/
2268 static void igbvf_tx_timeout(struct net_device *netdev)
2269 {
2270 struct igbvf_adapter *adapter = netdev_priv(netdev);
2271
2272 /* Do the reset outside of interrupt context */
2273 adapter->tx_timeout_count++;
2274 schedule_work(&adapter->reset_task);
2275 }
2276
2277 static void igbvf_reset_task(struct work_struct *work)
2278 {
2279 struct igbvf_adapter *adapter;
2280 adapter = container_of(work, struct igbvf_adapter, reset_task);
2281
2282 igbvf_reinit_locked(adapter);
2283 }
2284
2285 /**
2286 * igbvf_get_stats - Get System Network Statistics
2287 * @netdev: network interface device structure
2288 *
2289 * Returns the address of the device statistics structure.
2290 * The statistics are actually updated from the timer callback.
2291 **/
2292 static struct net_device_stats *igbvf_get_stats(struct net_device *netdev)
2293 {
2294 struct igbvf_adapter *adapter = netdev_priv(netdev);
2295
2296 /* only return the current stats */
2297 return &adapter->net_stats;
2298 }
2299
2300 /**
2301 * igbvf_change_mtu - Change the Maximum Transfer Unit
2302 * @netdev: network interface device structure
2303 * @new_mtu: new value for maximum frame size
2304 *
2305 * Returns 0 on success, negative on failure
2306 **/
2307 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2308 {
2309 struct igbvf_adapter *adapter = netdev_priv(netdev);
2310 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2311
2312 if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2313 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n");
2314 return -EINVAL;
2315 }
2316
2317 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2318 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2319 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
2320 return -EINVAL;
2321 }
2322
2323 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2324 msleep(1);
2325 /* igbvf_down has a dependency on max_frame_size */
2326 adapter->max_frame_size = max_frame;
2327 if (netif_running(netdev))
2328 igbvf_down(adapter);
2329
2330 /*
2331 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2332 * means we reserve 2 more, this pushes us to allocate from the next
2333 * larger slab size.
2334 * i.e. RXBUFFER_2048 --> size-4096 slab
2335 * However with the new *_jumbo_rx* routines, jumbo receives will use
2336 * fragmented skbs
2337 */
2338
2339 if (max_frame <= 1024)
2340 adapter->rx_buffer_len = 1024;
2341 else if (max_frame <= 2048)
2342 adapter->rx_buffer_len = 2048;
2343 else
2344 #if (PAGE_SIZE / 2) > 16384
2345 adapter->rx_buffer_len = 16384;
2346 #else
2347 adapter->rx_buffer_len = PAGE_SIZE / 2;
2348 #endif
2349
2350
2351 /* adjust allocation if LPE protects us, and we aren't using SBP */
2352 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2353 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2354 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2355 ETH_FCS_LEN;
2356
2357 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
2358 netdev->mtu, new_mtu);
2359 netdev->mtu = new_mtu;
2360
2361 if (netif_running(netdev))
2362 igbvf_up(adapter);
2363 else
2364 igbvf_reset(adapter);
2365
2366 clear_bit(__IGBVF_RESETTING, &adapter->state);
2367
2368 return 0;
2369 }
2370
2371 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2372 {
2373 switch (cmd) {
2374 default:
2375 return -EOPNOTSUPP;
2376 }
2377 }
2378
2379 static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state)
2380 {
2381 struct net_device *netdev = pci_get_drvdata(pdev);
2382 struct igbvf_adapter *adapter = netdev_priv(netdev);
2383 #ifdef CONFIG_PM
2384 int retval = 0;
2385 #endif
2386
2387 netif_device_detach(netdev);
2388
2389 if (netif_running(netdev)) {
2390 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2391 igbvf_down(adapter);
2392 igbvf_free_irq(adapter);
2393 }
2394
2395 #ifdef CONFIG_PM
2396 retval = pci_save_state(pdev);
2397 if (retval)
2398 return retval;
2399 #endif
2400
2401 pci_disable_device(pdev);
2402
2403 return 0;
2404 }
2405
2406 #ifdef CONFIG_PM
2407 static int igbvf_resume(struct pci_dev *pdev)
2408 {
2409 struct net_device *netdev = pci_get_drvdata(pdev);
2410 struct igbvf_adapter *adapter = netdev_priv(netdev);
2411 u32 err;
2412
2413 pci_restore_state(pdev);
2414 err = pci_enable_device_mem(pdev);
2415 if (err) {
2416 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2417 return err;
2418 }
2419
2420 pci_set_master(pdev);
2421
2422 if (netif_running(netdev)) {
2423 err = igbvf_request_irq(adapter);
2424 if (err)
2425 return err;
2426 }
2427
2428 igbvf_reset(adapter);
2429
2430 if (netif_running(netdev))
2431 igbvf_up(adapter);
2432
2433 netif_device_attach(netdev);
2434
2435 return 0;
2436 }
2437 #endif
2438
2439 static void igbvf_shutdown(struct pci_dev *pdev)
2440 {
2441 igbvf_suspend(pdev, PMSG_SUSPEND);
2442 }
2443
2444 #ifdef CONFIG_NET_POLL_CONTROLLER
2445 /*
2446 * Polling 'interrupt' - used by things like netconsole to send skbs
2447 * without having to re-enable interrupts. It's not called while
2448 * the interrupt routine is executing.
2449 */
2450 static void igbvf_netpoll(struct net_device *netdev)
2451 {
2452 struct igbvf_adapter *adapter = netdev_priv(netdev);
2453
2454 disable_irq(adapter->pdev->irq);
2455
2456 igbvf_clean_tx_irq(adapter->tx_ring);
2457
2458 enable_irq(adapter->pdev->irq);
2459 }
2460 #endif
2461
2462 /**
2463 * igbvf_io_error_detected - called when PCI error is detected
2464 * @pdev: Pointer to PCI device
2465 * @state: The current pci connection state
2466 *
2467 * This function is called after a PCI bus error affecting
2468 * this device has been detected.
2469 */
2470 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2471 pci_channel_state_t state)
2472 {
2473 struct net_device *netdev = pci_get_drvdata(pdev);
2474 struct igbvf_adapter *adapter = netdev_priv(netdev);
2475
2476 netif_device_detach(netdev);
2477
2478 if (state == pci_channel_io_perm_failure)
2479 return PCI_ERS_RESULT_DISCONNECT;
2480
2481 if (netif_running(netdev))
2482 igbvf_down(adapter);
2483 pci_disable_device(pdev);
2484
2485 /* Request a slot slot reset. */
2486 return PCI_ERS_RESULT_NEED_RESET;
2487 }
2488
2489 /**
2490 * igbvf_io_slot_reset - called after the pci bus has been reset.
2491 * @pdev: Pointer to PCI device
2492 *
2493 * Restart the card from scratch, as if from a cold-boot. Implementation
2494 * resembles the first-half of the igbvf_resume routine.
2495 */
2496 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2497 {
2498 struct net_device *netdev = pci_get_drvdata(pdev);
2499 struct igbvf_adapter *adapter = netdev_priv(netdev);
2500
2501 if (pci_enable_device_mem(pdev)) {
2502 dev_err(&pdev->dev,
2503 "Cannot re-enable PCI device after reset.\n");
2504 return PCI_ERS_RESULT_DISCONNECT;
2505 }
2506 pci_set_master(pdev);
2507
2508 igbvf_reset(adapter);
2509
2510 return PCI_ERS_RESULT_RECOVERED;
2511 }
2512
2513 /**
2514 * igbvf_io_resume - called when traffic can start flowing again.
2515 * @pdev: Pointer to PCI device
2516 *
2517 * This callback is called when the error recovery driver tells us that
2518 * its OK to resume normal operation. Implementation resembles the
2519 * second-half of the igbvf_resume routine.
2520 */
2521 static void igbvf_io_resume(struct pci_dev *pdev)
2522 {
2523 struct net_device *netdev = pci_get_drvdata(pdev);
2524 struct igbvf_adapter *adapter = netdev_priv(netdev);
2525
2526 if (netif_running(netdev)) {
2527 if (igbvf_up(adapter)) {
2528 dev_err(&pdev->dev,
2529 "can't bring device back up after reset\n");
2530 return;
2531 }
2532 }
2533
2534 netif_device_attach(netdev);
2535 }
2536
2537 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2538 {
2539 struct e1000_hw *hw = &adapter->hw;
2540 struct net_device *netdev = adapter->netdev;
2541 struct pci_dev *pdev = adapter->pdev;
2542
2543 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2544 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2545 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
2546 }
2547
2548 static const struct net_device_ops igbvf_netdev_ops = {
2549 .ndo_open = igbvf_open,
2550 .ndo_stop = igbvf_close,
2551 .ndo_start_xmit = igbvf_xmit_frame,
2552 .ndo_get_stats = igbvf_get_stats,
2553 .ndo_set_multicast_list = igbvf_set_multi,
2554 .ndo_set_mac_address = igbvf_set_mac,
2555 .ndo_change_mtu = igbvf_change_mtu,
2556 .ndo_do_ioctl = igbvf_ioctl,
2557 .ndo_tx_timeout = igbvf_tx_timeout,
2558 .ndo_vlan_rx_register = igbvf_vlan_rx_register,
2559 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2560 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2561 #ifdef CONFIG_NET_POLL_CONTROLLER
2562 .ndo_poll_controller = igbvf_netpoll,
2563 #endif
2564 };
2565
2566 /**
2567 * igbvf_probe - Device Initialization Routine
2568 * @pdev: PCI device information struct
2569 * @ent: entry in igbvf_pci_tbl
2570 *
2571 * Returns 0 on success, negative on failure
2572 *
2573 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2574 * The OS initialization, configuring of the adapter private structure,
2575 * and a hardware reset occur.
2576 **/
2577 static int __devinit igbvf_probe(struct pci_dev *pdev,
2578 const struct pci_device_id *ent)
2579 {
2580 struct net_device *netdev;
2581 struct igbvf_adapter *adapter;
2582 struct e1000_hw *hw;
2583 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2584
2585 static int cards_found;
2586 int err, pci_using_dac;
2587
2588 err = pci_enable_device_mem(pdev);
2589 if (err)
2590 return err;
2591
2592 pci_using_dac = 0;
2593 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
2594 if (!err) {
2595 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2596 if (!err)
2597 pci_using_dac = 1;
2598 } else {
2599 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
2600 if (err) {
2601 err = dma_set_coherent_mask(&pdev->dev,
2602 DMA_BIT_MASK(32));
2603 if (err) {
2604 dev_err(&pdev->dev, "No usable DMA "
2605 "configuration, aborting\n");
2606 goto err_dma;
2607 }
2608 }
2609 }
2610
2611 err = pci_request_regions(pdev, igbvf_driver_name);
2612 if (err)
2613 goto err_pci_reg;
2614
2615 pci_set_master(pdev);
2616
2617 err = -ENOMEM;
2618 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2619 if (!netdev)
2620 goto err_alloc_etherdev;
2621
2622 SET_NETDEV_DEV(netdev, &pdev->dev);
2623
2624 pci_set_drvdata(pdev, netdev);
2625 adapter = netdev_priv(netdev);
2626 hw = &adapter->hw;
2627 adapter->netdev = netdev;
2628 adapter->pdev = pdev;
2629 adapter->ei = ei;
2630 adapter->pba = ei->pba;
2631 adapter->flags = ei->flags;
2632 adapter->hw.back = adapter;
2633 adapter->hw.mac.type = ei->mac;
2634 adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
2635
2636 /* PCI config space info */
2637
2638 hw->vendor_id = pdev->vendor;
2639 hw->device_id = pdev->device;
2640 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2641 hw->subsystem_device_id = pdev->subsystem_device;
2642 hw->revision_id = pdev->revision;
2643
2644 err = -EIO;
2645 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2646 pci_resource_len(pdev, 0));
2647
2648 if (!adapter->hw.hw_addr)
2649 goto err_ioremap;
2650
2651 if (ei->get_variants) {
2652 err = ei->get_variants(adapter);
2653 if (err)
2654 goto err_ioremap;
2655 }
2656
2657 /* setup adapter struct */
2658 err = igbvf_sw_init(adapter);
2659 if (err)
2660 goto err_sw_init;
2661
2662 /* construct the net_device struct */
2663 netdev->netdev_ops = &igbvf_netdev_ops;
2664
2665 igbvf_set_ethtool_ops(netdev);
2666 netdev->watchdog_timeo = 5 * HZ;
2667 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2668
2669 adapter->bd_number = cards_found++;
2670
2671 netdev->features = NETIF_F_SG |
2672 NETIF_F_IP_CSUM |
2673 NETIF_F_HW_VLAN_TX |
2674 NETIF_F_HW_VLAN_RX |
2675 NETIF_F_HW_VLAN_FILTER;
2676
2677 netdev->features |= NETIF_F_IPV6_CSUM;
2678 netdev->features |= NETIF_F_TSO;
2679 netdev->features |= NETIF_F_TSO6;
2680
2681 if (pci_using_dac)
2682 netdev->features |= NETIF_F_HIGHDMA;
2683
2684 netdev->vlan_features |= NETIF_F_TSO;
2685 netdev->vlan_features |= NETIF_F_TSO6;
2686 netdev->vlan_features |= NETIF_F_IP_CSUM;
2687 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
2688 netdev->vlan_features |= NETIF_F_SG;
2689
2690 /*reset the controller to put the device in a known good state */
2691 err = hw->mac.ops.reset_hw(hw);
2692 if (err) {
2693 dev_info(&pdev->dev,
2694 "PF still in reset state, assigning new address."
2695 " Is the PF interface up?\n");
2696 dev_hw_addr_random(adapter->netdev, hw->mac.addr);
2697 } else {
2698 err = hw->mac.ops.read_mac_addr(hw);
2699 if (err) {
2700 dev_err(&pdev->dev, "Error reading MAC address\n");
2701 goto err_hw_init;
2702 }
2703 }
2704
2705 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2706 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2707
2708 if (!is_valid_ether_addr(netdev->perm_addr)) {
2709 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n",
2710 netdev->dev_addr);
2711 err = -EIO;
2712 goto err_hw_init;
2713 }
2714
2715 setup_timer(&adapter->watchdog_timer, &igbvf_watchdog,
2716 (unsigned long) adapter);
2717
2718 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2719 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2720
2721 /* ring size defaults */
2722 adapter->rx_ring->count = 1024;
2723 adapter->tx_ring->count = 1024;
2724
2725 /* reset the hardware with the new settings */
2726 igbvf_reset(adapter);
2727
2728 strcpy(netdev->name, "eth%d");
2729 err = register_netdev(netdev);
2730 if (err)
2731 goto err_hw_init;
2732
2733 /* tell the stack to leave us alone until igbvf_open() is called */
2734 netif_carrier_off(netdev);
2735 netif_stop_queue(netdev);
2736
2737 igbvf_print_device_info(adapter);
2738
2739 igbvf_initialize_last_counter_stats(adapter);
2740
2741 return 0;
2742
2743 err_hw_init:
2744 kfree(adapter->tx_ring);
2745 kfree(adapter->rx_ring);
2746 err_sw_init:
2747 igbvf_reset_interrupt_capability(adapter);
2748 iounmap(adapter->hw.hw_addr);
2749 err_ioremap:
2750 free_netdev(netdev);
2751 err_alloc_etherdev:
2752 pci_release_regions(pdev);
2753 err_pci_reg:
2754 err_dma:
2755 pci_disable_device(pdev);
2756 return err;
2757 }
2758
2759 /**
2760 * igbvf_remove - Device Removal Routine
2761 * @pdev: PCI device information struct
2762 *
2763 * igbvf_remove is called by the PCI subsystem to alert the driver
2764 * that it should release a PCI device. The could be caused by a
2765 * Hot-Plug event, or because the driver is going to be removed from
2766 * memory.
2767 **/
2768 static void __devexit igbvf_remove(struct pci_dev *pdev)
2769 {
2770 struct net_device *netdev = pci_get_drvdata(pdev);
2771 struct igbvf_adapter *adapter = netdev_priv(netdev);
2772 struct e1000_hw *hw = &adapter->hw;
2773
2774 /*
2775 * The watchdog timer may be rescheduled, so explicitly
2776 * disable it from being rescheduled.
2777 */
2778 set_bit(__IGBVF_DOWN, &adapter->state);
2779 del_timer_sync(&adapter->watchdog_timer);
2780
2781 cancel_work_sync(&adapter->reset_task);
2782 cancel_work_sync(&adapter->watchdog_task);
2783
2784 unregister_netdev(netdev);
2785
2786 igbvf_reset_interrupt_capability(adapter);
2787
2788 /*
2789 * it is important to delete the napi struct prior to freeing the
2790 * rx ring so that you do not end up with null pointer refs
2791 */
2792 netif_napi_del(&adapter->rx_ring->napi);
2793 kfree(adapter->tx_ring);
2794 kfree(adapter->rx_ring);
2795
2796 iounmap(hw->hw_addr);
2797 if (hw->flash_address)
2798 iounmap(hw->flash_address);
2799 pci_release_regions(pdev);
2800
2801 free_netdev(netdev);
2802
2803 pci_disable_device(pdev);
2804 }
2805
2806 /* PCI Error Recovery (ERS) */
2807 static struct pci_error_handlers igbvf_err_handler = {
2808 .error_detected = igbvf_io_error_detected,
2809 .slot_reset = igbvf_io_slot_reset,
2810 .resume = igbvf_io_resume,
2811 };
2812
2813 static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl) = {
2814 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2815 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
2816 { } /* terminate list */
2817 };
2818 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2819
2820 /* PCI Device API Driver */
2821 static struct pci_driver igbvf_driver = {
2822 .name = igbvf_driver_name,
2823 .id_table = igbvf_pci_tbl,
2824 .probe = igbvf_probe,
2825 .remove = __devexit_p(igbvf_remove),
2826 #ifdef CONFIG_PM
2827 /* Power Management Hooks */
2828 .suspend = igbvf_suspend,
2829 .resume = igbvf_resume,
2830 #endif
2831 .shutdown = igbvf_shutdown,
2832 .err_handler = &igbvf_err_handler
2833 };
2834
2835 /**
2836 * igbvf_init_module - Driver Registration Routine
2837 *
2838 * igbvf_init_module is the first routine called when the driver is
2839 * loaded. All it does is register with the PCI subsystem.
2840 **/
2841 static int __init igbvf_init_module(void)
2842 {
2843 int ret;
2844 printk(KERN_INFO "%s - version %s\n",
2845 igbvf_driver_string, igbvf_driver_version);
2846 printk(KERN_INFO "%s\n", igbvf_copyright);
2847
2848 ret = pci_register_driver(&igbvf_driver);
2849
2850 return ret;
2851 }
2852 module_init(igbvf_init_module);
2853
2854 /**
2855 * igbvf_exit_module - Driver Exit Cleanup Routine
2856 *
2857 * igbvf_exit_module is called just before the driver is removed
2858 * from memory.
2859 **/
2860 static void __exit igbvf_exit_module(void)
2861 {
2862 pci_unregister_driver(&igbvf_driver);
2863 }
2864 module_exit(igbvf_exit_module);
2865
2866
2867 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2868 MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver");
2869 MODULE_LICENSE("GPL");
2870 MODULE_VERSION(DRV_VERSION);
2871
2872 /* netdev.c */
linux-next