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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2009 - 2018 Intel Corporation. */
3
4#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
5
6#include <linux/module.h>
7#include <linux/types.h>
8#include <linux/init.h>
9#include <linux/pci.h>
10#include <linux/vmalloc.h>
11#include <linux/pagemap.h>
12#include <linux/delay.h>
13#include <linux/netdevice.h>
14#include <linux/tcp.h>
15#include <linux/ipv6.h>
16#include <linux/slab.h>
17#include <net/checksum.h>
18#include <net/ip6_checksum.h>
19#include <linux/mii.h>
20#include <linux/ethtool.h>
21#include <linux/if_vlan.h>
22#include <linux/prefetch.h>
23#include <linux/sctp.h>
24
25#include "igbvf.h"
26
27char igbvf_driver_name[] = "igbvf";
28static const char igbvf_driver_string[] =
29 "Intel(R) Gigabit Virtual Function Network Driver";
30static const char igbvf_copyright[] =
31 "Copyright (c) 2009 - 2012 Intel Corporation.";
32
33#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
34static int debug = -1;
35module_param(debug, int, 0);
36MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
37
38static int igbvf_poll(struct napi_struct *napi, int budget);
39static void igbvf_reset(struct igbvf_adapter *);
40static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
41static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
42
43static struct igbvf_info igbvf_vf_info = {
44 .mac = e1000_vfadapt,
45 .flags = 0,
46 .pba = 10,
47 .init_ops = e1000_init_function_pointers_vf,
48};
49
50static struct igbvf_info igbvf_i350_vf_info = {
51 .mac = e1000_vfadapt_i350,
52 .flags = 0,
53 .pba = 10,
54 .init_ops = e1000_init_function_pointers_vf,
55};
56
57static const struct igbvf_info *igbvf_info_tbl[] = {
58 [board_vf] = &igbvf_vf_info,
59 [board_i350_vf] = &igbvf_i350_vf_info,
60};
61
62/**
63 * igbvf_desc_unused - calculate if we have unused descriptors
64 * @ring: address of receive ring structure
65 **/
66static int igbvf_desc_unused(struct igbvf_ring *ring)
67{
68 if (ring->next_to_clean > ring->next_to_use)
69 return ring->next_to_clean - ring->next_to_use - 1;
70
71 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
72}
73
74/**
75 * igbvf_receive_skb - helper function to handle Rx indications
76 * @adapter: board private structure
77 * @netdev: pointer to netdev struct
78 * @skb: skb to indicate to stack
79 * @status: descriptor status field as written by hardware
80 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
81 * @skb: pointer to sk_buff to be indicated to stack
82 **/
83static void igbvf_receive_skb(struct igbvf_adapter *adapter,
84 struct net_device *netdev,
85 struct sk_buff *skb,
86 u32 status, __le16 vlan)
87{
88 u16 vid;
89
90 if (status & E1000_RXD_STAT_VP) {
91 if ((adapter->flags & IGBVF_FLAG_RX_LB_VLAN_BSWAP) &&
92 (status & E1000_RXDEXT_STATERR_LB))
93 vid = be16_to_cpu((__force __be16)vlan) & E1000_RXD_SPC_VLAN_MASK;
94 else
95 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
96 if (test_bit(vid, adapter->active_vlans))
97 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
98 }
99
100 napi_gro_receive(&adapter->rx_ring->napi, skb);
101}
102
103static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
104 u32 status_err, struct sk_buff *skb)
105{
106 skb_checksum_none_assert(skb);
107
108 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
109 if ((status_err & E1000_RXD_STAT_IXSM) ||
110 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
111 return;
112
113 /* TCP/UDP checksum error bit is set */
114 if (status_err &
115 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
116 /* let the stack verify checksum errors */
117 adapter->hw_csum_err++;
118 return;
119 }
120
121 /* It must be a TCP or UDP packet with a valid checksum */
122 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
123 skb->ip_summed = CHECKSUM_UNNECESSARY;
124
125 adapter->hw_csum_good++;
126}
127
128/**
129 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
130 * @rx_ring: address of ring structure to repopulate
131 * @cleaned_count: number of buffers to repopulate
132 **/
133static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
134 int cleaned_count)
135{
136 struct igbvf_adapter *adapter = rx_ring->adapter;
137 struct net_device *netdev = adapter->netdev;
138 struct pci_dev *pdev = adapter->pdev;
139 union e1000_adv_rx_desc *rx_desc;
140 struct igbvf_buffer *buffer_info;
141 struct sk_buff *skb;
142 unsigned int i;
143 int bufsz;
144
145 i = rx_ring->next_to_use;
146 buffer_info = &rx_ring->buffer_info[i];
147
148 if (adapter->rx_ps_hdr_size)
149 bufsz = adapter->rx_ps_hdr_size;
150 else
151 bufsz = adapter->rx_buffer_len;
152
153 while (cleaned_count--) {
154 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
155
156 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
157 if (!buffer_info->page) {
158 buffer_info->page = alloc_page(GFP_ATOMIC);
159 if (!buffer_info->page) {
160 adapter->alloc_rx_buff_failed++;
161 goto no_buffers;
162 }
163 buffer_info->page_offset = 0;
164 } else {
165 buffer_info->page_offset ^= PAGE_SIZE / 2;
166 }
167 buffer_info->page_dma =
168 dma_map_page(&pdev->dev, buffer_info->page,
169 buffer_info->page_offset,
170 PAGE_SIZE / 2,
171 DMA_FROM_DEVICE);
172 if (dma_mapping_error(&pdev->dev,
173 buffer_info->page_dma)) {
174 __free_page(buffer_info->page);
175 buffer_info->page = NULL;
176 dev_err(&pdev->dev, "RX DMA map failed\n");
177 break;
178 }
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 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
193 dev_kfree_skb(buffer_info->skb);
194 buffer_info->skb = NULL;
195 dev_err(&pdev->dev, "RX DMA map failed\n");
196 goto no_buffers;
197 }
198 }
199 /* Refresh the desc even if buffer_addrs didn't change because
200 * each write-back erases this info.
201 */
202 if (adapter->rx_ps_hdr_size) {
203 rx_desc->read.pkt_addr =
204 cpu_to_le64(buffer_info->page_dma);
205 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
206 } else {
207 rx_desc->read.pkt_addr = cpu_to_le64(buffer_info->dma);
208 rx_desc->read.hdr_addr = 0;
209 }
210
211 i++;
212 if (i == rx_ring->count)
213 i = 0;
214 buffer_info = &rx_ring->buffer_info[i];
215 }
216
217no_buffers:
218 if (rx_ring->next_to_use != i) {
219 rx_ring->next_to_use = i;
220 if (i == 0)
221 i = (rx_ring->count - 1);
222 else
223 i--;
224
225 /* Force memory writes to complete before letting h/w
226 * know there are new descriptors to fetch. (Only
227 * applicable for weak-ordered memory model archs,
228 * such as IA-64).
229 */
230 wmb();
231 writel(i, adapter->hw.hw_addr + rx_ring->tail);
232 }
233}
234
235/**
236 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
237 * @adapter: board private structure
238 * @work_done: output parameter used to indicate completed work
239 * @work_to_do: input parameter setting limit of work
240 *
241 * the return value indicates whether actual cleaning was done, there
242 * is no guarantee that everything was cleaned
243 **/
244static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
245 int *work_done, int work_to_do)
246{
247 struct igbvf_ring *rx_ring = adapter->rx_ring;
248 struct net_device *netdev = adapter->netdev;
249 struct pci_dev *pdev = adapter->pdev;
250 union e1000_adv_rx_desc *rx_desc, *next_rxd;
251 struct igbvf_buffer *buffer_info, *next_buffer;
252 struct sk_buff *skb;
253 bool cleaned = false;
254 int cleaned_count = 0;
255 unsigned int total_bytes = 0, total_packets = 0;
256 unsigned int i;
257 u32 length, hlen, staterr;
258
259 i = rx_ring->next_to_clean;
260 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
261 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
262
263 while (staterr & E1000_RXD_STAT_DD) {
264 if (*work_done >= work_to_do)
265 break;
266 (*work_done)++;
267 rmb(); /* read descriptor and rx_buffer_info after status DD */
268
269 buffer_info = &rx_ring->buffer_info[i];
270
271 /* HW will not DMA in data larger than the given buffer, even
272 * if it parses the (NFS, of course) header to be larger. In
273 * that case, it fills the header buffer and spills the rest
274 * into the page.
275 */
276 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info)
277 & E1000_RXDADV_HDRBUFLEN_MASK) >>
278 E1000_RXDADV_HDRBUFLEN_SHIFT;
279 if (hlen > adapter->rx_ps_hdr_size)
280 hlen = adapter->rx_ps_hdr_size;
281
282 length = le16_to_cpu(rx_desc->wb.upper.length);
283 cleaned = true;
284 cleaned_count++;
285
286 skb = buffer_info->skb;
287 prefetch(skb->data - NET_IP_ALIGN);
288 buffer_info->skb = NULL;
289 if (!adapter->rx_ps_hdr_size) {
290 dma_unmap_single(&pdev->dev, buffer_info->dma,
291 adapter->rx_buffer_len,
292 DMA_FROM_DEVICE);
293 buffer_info->dma = 0;
294 skb_put(skb, length);
295 goto send_up;
296 }
297
298 if (!skb_shinfo(skb)->nr_frags) {
299 dma_unmap_single(&pdev->dev, buffer_info->dma,
300 adapter->rx_ps_hdr_size,
301 DMA_FROM_DEVICE);
302 buffer_info->dma = 0;
303 skb_put(skb, hlen);
304 }
305
306 if (length) {
307 dma_unmap_page(&pdev->dev, buffer_info->page_dma,
308 PAGE_SIZE / 2,
309 DMA_FROM_DEVICE);
310 buffer_info->page_dma = 0;
311
312 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
313 buffer_info->page,
314 buffer_info->page_offset,
315 length);
316
317 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
318 (page_count(buffer_info->page) != 1))
319 buffer_info->page = NULL;
320 else
321 get_page(buffer_info->page);
322
323 skb->len += length;
324 skb->data_len += length;
325 skb->truesize += PAGE_SIZE / 2;
326 }
327send_up:
328 i++;
329 if (i == rx_ring->count)
330 i = 0;
331 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
332 prefetch(next_rxd);
333 next_buffer = &rx_ring->buffer_info[i];
334
335 if (!(staterr & E1000_RXD_STAT_EOP)) {
336 buffer_info->skb = next_buffer->skb;
337 buffer_info->dma = next_buffer->dma;
338 next_buffer->skb = skb;
339 next_buffer->dma = 0;
340 goto next_desc;
341 }
342
343 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
344 dev_kfree_skb_irq(skb);
345 goto next_desc;
346 }
347
348 total_bytes += skb->len;
349 total_packets++;
350
351 igbvf_rx_checksum_adv(adapter, staterr, skb);
352
353 skb->protocol = eth_type_trans(skb, netdev);
354
355 igbvf_receive_skb(adapter, netdev, skb, staterr,
356 rx_desc->wb.upper.vlan);
357
358next_desc:
359 rx_desc->wb.upper.status_error = 0;
360
361 /* return some buffers to hardware, one at a time is too slow */
362 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
363 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
364 cleaned_count = 0;
365 }
366
367 /* use prefetched values */
368 rx_desc = next_rxd;
369 buffer_info = next_buffer;
370
371 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
372 }
373
374 rx_ring->next_to_clean = i;
375 cleaned_count = igbvf_desc_unused(rx_ring);
376
377 if (cleaned_count)
378 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
379
380 adapter->total_rx_packets += total_packets;
381 adapter->total_rx_bytes += total_bytes;
382 netdev->stats.rx_bytes += total_bytes;
383 netdev->stats.rx_packets += total_packets;
384 return cleaned;
385}
386
387static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
388 struct igbvf_buffer *buffer_info)
389{
390 if (buffer_info->dma) {
391 if (buffer_info->mapped_as_page)
392 dma_unmap_page(&adapter->pdev->dev,
393 buffer_info->dma,
394 buffer_info->length,
395 DMA_TO_DEVICE);
396 else
397 dma_unmap_single(&adapter->pdev->dev,
398 buffer_info->dma,
399 buffer_info->length,
400 DMA_TO_DEVICE);
401 buffer_info->dma = 0;
402 }
403 if (buffer_info->skb) {
404 dev_kfree_skb_any(buffer_info->skb);
405 buffer_info->skb = NULL;
406 }
407 buffer_info->time_stamp = 0;
408}
409
410/**
411 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
412 * @adapter: board private structure
413 * @tx_ring: ring being initialized
414 *
415 * Return 0 on success, negative on failure
416 **/
417int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
418 struct igbvf_ring *tx_ring)
419{
420 struct pci_dev *pdev = adapter->pdev;
421 int size;
422
423 size = sizeof(struct igbvf_buffer) * tx_ring->count;
424 tx_ring->buffer_info = vzalloc(size);
425 if (!tx_ring->buffer_info)
426 goto err;
427
428 /* round up to nearest 4K */
429 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
430 tx_ring->size = ALIGN(tx_ring->size, 4096);
431
432 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
433 &tx_ring->dma, GFP_KERNEL);
434 if (!tx_ring->desc)
435 goto err;
436
437 tx_ring->adapter = adapter;
438 tx_ring->next_to_use = 0;
439 tx_ring->next_to_clean = 0;
440
441 return 0;
442err:
443 vfree(tx_ring->buffer_info);
444 dev_err(&adapter->pdev->dev,
445 "Unable to allocate memory for the transmit descriptor ring\n");
446 return -ENOMEM;
447}
448
449/**
450 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
451 * @adapter: board private structure
452 * @rx_ring: ring being initialized
453 *
454 * Returns 0 on success, negative on failure
455 **/
456int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
457 struct igbvf_ring *rx_ring)
458{
459 struct pci_dev *pdev = adapter->pdev;
460 int size, desc_len;
461
462 size = sizeof(struct igbvf_buffer) * rx_ring->count;
463 rx_ring->buffer_info = vzalloc(size);
464 if (!rx_ring->buffer_info)
465 goto err;
466
467 desc_len = sizeof(union e1000_adv_rx_desc);
468
469 /* Round up to nearest 4K */
470 rx_ring->size = rx_ring->count * desc_len;
471 rx_ring->size = ALIGN(rx_ring->size, 4096);
472
473 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
474 &rx_ring->dma, GFP_KERNEL);
475 if (!rx_ring->desc)
476 goto err;
477
478 rx_ring->next_to_clean = 0;
479 rx_ring->next_to_use = 0;
480
481 rx_ring->adapter = adapter;
482
483 return 0;
484
485err:
486 vfree(rx_ring->buffer_info);
487 rx_ring->buffer_info = NULL;
488 dev_err(&adapter->pdev->dev,
489 "Unable to allocate memory for the receive descriptor ring\n");
490 return -ENOMEM;
491}
492
493/**
494 * igbvf_clean_tx_ring - Free Tx Buffers
495 * @tx_ring: ring to be cleaned
496 **/
497static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
498{
499 struct igbvf_adapter *adapter = tx_ring->adapter;
500 struct igbvf_buffer *buffer_info;
501 unsigned long size;
502 unsigned int i;
503
504 if (!tx_ring->buffer_info)
505 return;
506
507 /* Free all the Tx ring sk_buffs */
508 for (i = 0; i < tx_ring->count; i++) {
509 buffer_info = &tx_ring->buffer_info[i];
510 igbvf_put_txbuf(adapter, buffer_info);
511 }
512
513 size = sizeof(struct igbvf_buffer) * tx_ring->count;
514 memset(tx_ring->buffer_info, 0, size);
515
516 /* Zero out the descriptor ring */
517 memset(tx_ring->desc, 0, tx_ring->size);
518
519 tx_ring->next_to_use = 0;
520 tx_ring->next_to_clean = 0;
521
522 writel(0, adapter->hw.hw_addr + tx_ring->head);
523 writel(0, adapter->hw.hw_addr + tx_ring->tail);
524}
525
526/**
527 * igbvf_free_tx_resources - Free Tx Resources per Queue
528 * @tx_ring: ring to free resources from
529 *
530 * Free all transmit software resources
531 **/
532void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
533{
534 struct pci_dev *pdev = tx_ring->adapter->pdev;
535
536 igbvf_clean_tx_ring(tx_ring);
537
538 vfree(tx_ring->buffer_info);
539 tx_ring->buffer_info = NULL;
540
541 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
542 tx_ring->dma);
543
544 tx_ring->desc = NULL;
545}
546
547/**
548 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
549 * @rx_ring: ring structure pointer to free buffers from
550 **/
551static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
552{
553 struct igbvf_adapter *adapter = rx_ring->adapter;
554 struct igbvf_buffer *buffer_info;
555 struct pci_dev *pdev = adapter->pdev;
556 unsigned long size;
557 unsigned int i;
558
559 if (!rx_ring->buffer_info)
560 return;
561
562 /* Free all the Rx ring sk_buffs */
563 for (i = 0; i < rx_ring->count; i++) {
564 buffer_info = &rx_ring->buffer_info[i];
565 if (buffer_info->dma) {
566 if (adapter->rx_ps_hdr_size) {
567 dma_unmap_single(&pdev->dev, buffer_info->dma,
568 adapter->rx_ps_hdr_size,
569 DMA_FROM_DEVICE);
570 } else {
571 dma_unmap_single(&pdev->dev, buffer_info->dma,
572 adapter->rx_buffer_len,
573 DMA_FROM_DEVICE);
574 }
575 buffer_info->dma = 0;
576 }
577
578 if (buffer_info->skb) {
579 dev_kfree_skb(buffer_info->skb);
580 buffer_info->skb = NULL;
581 }
582
583 if (buffer_info->page) {
584 if (buffer_info->page_dma)
585 dma_unmap_page(&pdev->dev,
586 buffer_info->page_dma,
587 PAGE_SIZE / 2,
588 DMA_FROM_DEVICE);
589 put_page(buffer_info->page);
590 buffer_info->page = NULL;
591 buffer_info->page_dma = 0;
592 buffer_info->page_offset = 0;
593 }
594 }
595
596 size = sizeof(struct igbvf_buffer) * rx_ring->count;
597 memset(rx_ring->buffer_info, 0, size);
598
599 /* Zero out the descriptor ring */
600 memset(rx_ring->desc, 0, rx_ring->size);
601
602 rx_ring->next_to_clean = 0;
603 rx_ring->next_to_use = 0;
604
605 writel(0, adapter->hw.hw_addr + rx_ring->head);
606 writel(0, adapter->hw.hw_addr + rx_ring->tail);
607}
608
609/**
610 * igbvf_free_rx_resources - Free Rx Resources
611 * @rx_ring: ring to clean the resources from
612 *
613 * Free all receive software resources
614 **/
615
616void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
617{
618 struct pci_dev *pdev = rx_ring->adapter->pdev;
619
620 igbvf_clean_rx_ring(rx_ring);
621
622 vfree(rx_ring->buffer_info);
623 rx_ring->buffer_info = NULL;
624
625 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
626 rx_ring->dma);
627 rx_ring->desc = NULL;
628}
629
630/**
631 * igbvf_update_itr - update the dynamic ITR value based on statistics
632 * @adapter: pointer to adapter
633 * @itr_setting: current adapter->itr
634 * @packets: the number of packets during this measurement interval
635 * @bytes: the number of bytes during this measurement interval
636 *
637 * Stores a new ITR value based on packets and byte counts during the last
638 * interrupt. The advantage of per interrupt computation is faster updates
639 * and more accurate ITR for the current traffic pattern. Constants in this
640 * function were computed based on theoretical maximum wire speed and thresholds
641 * were set based on testing data as well as attempting to minimize response
642 * time while increasing bulk throughput.
643 **/
644static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter,
645 enum latency_range itr_setting,
646 int packets, int bytes)
647{
648 enum latency_range retval = itr_setting;
649
650 if (packets == 0)
651 goto update_itr_done;
652
653 switch (itr_setting) {
654 case lowest_latency:
655 /* handle TSO and jumbo frames */
656 if (bytes/packets > 8000)
657 retval = bulk_latency;
658 else if ((packets < 5) && (bytes > 512))
659 retval = low_latency;
660 break;
661 case low_latency: /* 50 usec aka 20000 ints/s */
662 if (bytes > 10000) {
663 /* this if handles the TSO accounting */
664 if (bytes/packets > 8000)
665 retval = bulk_latency;
666 else if ((packets < 10) || ((bytes/packets) > 1200))
667 retval = bulk_latency;
668 else if ((packets > 35))
669 retval = lowest_latency;
670 } else if (bytes/packets > 2000) {
671 retval = bulk_latency;
672 } else if (packets <= 2 && bytes < 512) {
673 retval = lowest_latency;
674 }
675 break;
676 case bulk_latency: /* 250 usec aka 4000 ints/s */
677 if (bytes > 25000) {
678 if (packets > 35)
679 retval = low_latency;
680 } else if (bytes < 6000) {
681 retval = low_latency;
682 }
683 break;
684 default:
685 break;
686 }
687
688update_itr_done:
689 return retval;
690}
691
692static int igbvf_range_to_itr(enum latency_range current_range)
693{
694 int new_itr;
695
696 switch (current_range) {
697 /* counts and packets in update_itr are dependent on these numbers */
698 case lowest_latency:
699 new_itr = IGBVF_70K_ITR;
700 break;
701 case low_latency:
702 new_itr = IGBVF_20K_ITR;
703 break;
704 case bulk_latency:
705 new_itr = IGBVF_4K_ITR;
706 break;
707 default:
708 new_itr = IGBVF_START_ITR;
709 break;
710 }
711 return new_itr;
712}
713
714static void igbvf_set_itr(struct igbvf_adapter *adapter)
715{
716 u32 new_itr;
717
718 adapter->tx_ring->itr_range =
719 igbvf_update_itr(adapter,
720 adapter->tx_ring->itr_val,
721 adapter->total_tx_packets,
722 adapter->total_tx_bytes);
723
724 /* conservative mode (itr 3) eliminates the lowest_latency setting */
725 if (adapter->requested_itr == 3 &&
726 adapter->tx_ring->itr_range == lowest_latency)
727 adapter->tx_ring->itr_range = low_latency;
728
729 new_itr = igbvf_range_to_itr(adapter->tx_ring->itr_range);
730
731 if (new_itr != adapter->tx_ring->itr_val) {
732 u32 current_itr = adapter->tx_ring->itr_val;
733 /* this attempts to bias the interrupt rate towards Bulk
734 * by adding intermediate steps when interrupt rate is
735 * increasing
736 */
737 new_itr = new_itr > current_itr ?
738 min(current_itr + (new_itr >> 2), new_itr) :
739 new_itr;
740 adapter->tx_ring->itr_val = new_itr;
741
742 adapter->tx_ring->set_itr = 1;
743 }
744
745 adapter->rx_ring->itr_range =
746 igbvf_update_itr(adapter, adapter->rx_ring->itr_val,
747 adapter->total_rx_packets,
748 adapter->total_rx_bytes);
749 if (adapter->requested_itr == 3 &&
750 adapter->rx_ring->itr_range == lowest_latency)
751 adapter->rx_ring->itr_range = low_latency;
752
753 new_itr = igbvf_range_to_itr(adapter->rx_ring->itr_range);
754
755 if (new_itr != adapter->rx_ring->itr_val) {
756 u32 current_itr = adapter->rx_ring->itr_val;
757
758 new_itr = new_itr > current_itr ?
759 min(current_itr + (new_itr >> 2), new_itr) :
760 new_itr;
761 adapter->rx_ring->itr_val = new_itr;
762
763 adapter->rx_ring->set_itr = 1;
764 }
765}
766
767/**
768 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
769 * @tx_ring: ring structure to clean descriptors from
770 *
771 * returns true if ring is completely cleaned
772 **/
773static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
774{
775 struct igbvf_adapter *adapter = tx_ring->adapter;
776 struct net_device *netdev = adapter->netdev;
777 struct igbvf_buffer *buffer_info;
778 struct sk_buff *skb;
779 union e1000_adv_tx_desc *tx_desc, *eop_desc;
780 unsigned int total_bytes = 0, total_packets = 0;
781 unsigned int i, count = 0;
782 bool cleaned = false;
783
784 i = tx_ring->next_to_clean;
785 buffer_info = &tx_ring->buffer_info[i];
786 eop_desc = buffer_info->next_to_watch;
787
788 do {
789 /* if next_to_watch is not set then there is no work pending */
790 if (!eop_desc)
791 break;
792
793 /* prevent any other reads prior to eop_desc */
794 smp_rmb();
795
796 /* if DD is not set pending work has not been completed */
797 if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)))
798 break;
799
800 /* clear next_to_watch to prevent false hangs */
801 buffer_info->next_to_watch = NULL;
802
803 for (cleaned = false; !cleaned; count++) {
804 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
805 cleaned = (tx_desc == eop_desc);
806 skb = buffer_info->skb;
807
808 if (skb) {
809 unsigned int segs, bytecount;
810
811 /* gso_segs is currently only valid for tcp */
812 segs = skb_shinfo(skb)->gso_segs ?: 1;
813 /* multiply data chunks by size of headers */
814 bytecount = ((segs - 1) * skb_headlen(skb)) +
815 skb->len;
816 total_packets += segs;
817 total_bytes += bytecount;
818 }
819
820 igbvf_put_txbuf(adapter, buffer_info);
821 tx_desc->wb.status = 0;
822
823 i++;
824 if (i == tx_ring->count)
825 i = 0;
826
827 buffer_info = &tx_ring->buffer_info[i];
828 }
829
830 eop_desc = buffer_info->next_to_watch;
831 } while (count < tx_ring->count);
832
833 tx_ring->next_to_clean = i;
834
835 if (unlikely(count && netif_carrier_ok(netdev) &&
836 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
837 /* Make sure that anybody stopping the queue after this
838 * sees the new next_to_clean.
839 */
840 smp_mb();
841 if (netif_queue_stopped(netdev) &&
842 !(test_bit(__IGBVF_DOWN, &adapter->state))) {
843 netif_wake_queue(netdev);
844 ++adapter->restart_queue;
845 }
846 }
847
848 netdev->stats.tx_bytes += total_bytes;
849 netdev->stats.tx_packets += total_packets;
850 return count < tx_ring->count;
851}
852
853static irqreturn_t igbvf_msix_other(int irq, void *data)
854{
855 struct net_device *netdev = data;
856 struct igbvf_adapter *adapter = netdev_priv(netdev);
857 struct e1000_hw *hw = &adapter->hw;
858
859 adapter->int_counter1++;
860
861 hw->mac.get_link_status = 1;
862 if (!test_bit(__IGBVF_DOWN, &adapter->state))
863 mod_timer(&adapter->watchdog_timer, jiffies + 1);
864
865 ew32(EIMS, adapter->eims_other);
866
867 return IRQ_HANDLED;
868}
869
870static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
871{
872 struct net_device *netdev = data;
873 struct igbvf_adapter *adapter = netdev_priv(netdev);
874 struct e1000_hw *hw = &adapter->hw;
875 struct igbvf_ring *tx_ring = adapter->tx_ring;
876
877 if (tx_ring->set_itr) {
878 writel(tx_ring->itr_val,
879 adapter->hw.hw_addr + tx_ring->itr_register);
880 adapter->tx_ring->set_itr = 0;
881 }
882
883 adapter->total_tx_bytes = 0;
884 adapter->total_tx_packets = 0;
885
886 /* auto mask will automatically re-enable the interrupt when we write
887 * EICS
888 */
889 if (!igbvf_clean_tx_irq(tx_ring))
890 /* Ring was not completely cleaned, so fire another interrupt */
891 ew32(EICS, tx_ring->eims_value);
892 else
893 ew32(EIMS, tx_ring->eims_value);
894
895 return IRQ_HANDLED;
896}
897
898static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
899{
900 struct net_device *netdev = data;
901 struct igbvf_adapter *adapter = netdev_priv(netdev);
902
903 adapter->int_counter0++;
904
905 /* Write the ITR value calculated at the end of the
906 * previous interrupt.
907 */
908 if (adapter->rx_ring->set_itr) {
909 writel(adapter->rx_ring->itr_val,
910 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
911 adapter->rx_ring->set_itr = 0;
912 }
913
914 if (napi_schedule_prep(&adapter->rx_ring->napi)) {
915 adapter->total_rx_bytes = 0;
916 adapter->total_rx_packets = 0;
917 __napi_schedule(&adapter->rx_ring->napi);
918 }
919
920 return IRQ_HANDLED;
921}
922
923#define IGBVF_NO_QUEUE -1
924
925static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
926 int tx_queue, int msix_vector)
927{
928 struct e1000_hw *hw = &adapter->hw;
929 u32 ivar, index;
930
931 /* 82576 uses a table-based method for assigning vectors.
932 * Each queue has a single entry in the table to which we write
933 * a vector number along with a "valid" bit. Sadly, the layout
934 * of the table is somewhat counterintuitive.
935 */
936 if (rx_queue > IGBVF_NO_QUEUE) {
937 index = (rx_queue >> 1);
938 ivar = array_er32(IVAR0, index);
939 if (rx_queue & 0x1) {
940 /* vector goes into third byte of register */
941 ivar = ivar & 0xFF00FFFF;
942 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
943 } else {
944 /* vector goes into low byte of register */
945 ivar = ivar & 0xFFFFFF00;
946 ivar |= msix_vector | E1000_IVAR_VALID;
947 }
948 adapter->rx_ring[rx_queue].eims_value = BIT(msix_vector);
949 array_ew32(IVAR0, index, ivar);
950 }
951 if (tx_queue > IGBVF_NO_QUEUE) {
952 index = (tx_queue >> 1);
953 ivar = array_er32(IVAR0, index);
954 if (tx_queue & 0x1) {
955 /* vector goes into high byte of register */
956 ivar = ivar & 0x00FFFFFF;
957 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
958 } else {
959 /* vector goes into second byte of register */
960 ivar = ivar & 0xFFFF00FF;
961 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
962 }
963 adapter->tx_ring[tx_queue].eims_value = BIT(msix_vector);
964 array_ew32(IVAR0, index, ivar);
965 }
966}
967
968/**
969 * igbvf_configure_msix - Configure MSI-X hardware
970 * @adapter: board private structure
971 *
972 * igbvf_configure_msix sets up the hardware to properly
973 * generate MSI-X interrupts.
974 **/
975static void igbvf_configure_msix(struct igbvf_adapter *adapter)
976{
977 u32 tmp;
978 struct e1000_hw *hw = &adapter->hw;
979 struct igbvf_ring *tx_ring = adapter->tx_ring;
980 struct igbvf_ring *rx_ring = adapter->rx_ring;
981 int vector = 0;
982
983 adapter->eims_enable_mask = 0;
984
985 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
986 adapter->eims_enable_mask |= tx_ring->eims_value;
987 writel(tx_ring->itr_val, hw->hw_addr + tx_ring->itr_register);
988 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
989 adapter->eims_enable_mask |= rx_ring->eims_value;
990 writel(rx_ring->itr_val, hw->hw_addr + rx_ring->itr_register);
991
992 /* set vector for other causes, i.e. link changes */
993
994 tmp = (vector++ | E1000_IVAR_VALID);
995
996 ew32(IVAR_MISC, tmp);
997
998 adapter->eims_enable_mask = GENMASK(vector - 1, 0);
999 adapter->eims_other = BIT(vector - 1);
1000 e1e_flush();
1001}
1002
1003static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
1004{
1005 if (adapter->msix_entries) {
1006 pci_disable_msix(adapter->pdev);
1007 kfree(adapter->msix_entries);
1008 adapter->msix_entries = NULL;
1009 }
1010}
1011
1012/**
1013 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1014 * @adapter: board private structure
1015 *
1016 * Attempt to configure interrupts using the best available
1017 * capabilities of the hardware and kernel.
1018 **/
1019static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
1020{
1021 int err = -ENOMEM;
1022 int i;
1023
1024 /* we allocate 3 vectors, 1 for Tx, 1 for Rx, one for PF messages */
1025 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
1026 GFP_KERNEL);
1027 if (adapter->msix_entries) {
1028 for (i = 0; i < 3; i++)
1029 adapter->msix_entries[i].entry = i;
1030
1031 err = pci_enable_msix_range(adapter->pdev,
1032 adapter->msix_entries, 3, 3);
1033 }
1034
1035 if (err < 0) {
1036 /* MSI-X failed */
1037 dev_err(&adapter->pdev->dev,
1038 "Failed to initialize MSI-X interrupts.\n");
1039 igbvf_reset_interrupt_capability(adapter);
1040 }
1041}
1042
1043/**
1044 * igbvf_request_msix - Initialize MSI-X interrupts
1045 * @adapter: board private structure
1046 *
1047 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1048 * kernel.
1049 **/
1050static int igbvf_request_msix(struct igbvf_adapter *adapter)
1051{
1052 struct net_device *netdev = adapter->netdev;
1053 int err = 0, vector = 0;
1054
1055 if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1056 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1057 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1058 } else {
1059 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1060 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1061 }
1062
1063 err = request_irq(adapter->msix_entries[vector].vector,
1064 igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1065 netdev);
1066 if (err)
1067 goto out;
1068
1069 adapter->tx_ring->itr_register = E1000_EITR(vector);
1070 adapter->tx_ring->itr_val = adapter->current_itr;
1071 vector++;
1072
1073 err = request_irq(adapter->msix_entries[vector].vector,
1074 igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1075 netdev);
1076 if (err)
1077 goto out;
1078
1079 adapter->rx_ring->itr_register = E1000_EITR(vector);
1080 adapter->rx_ring->itr_val = adapter->current_itr;
1081 vector++;
1082
1083 err = request_irq(adapter->msix_entries[vector].vector,
1084 igbvf_msix_other, 0, netdev->name, netdev);
1085 if (err)
1086 goto out;
1087
1088 igbvf_configure_msix(adapter);
1089 return 0;
1090out:
1091 return err;
1092}
1093
1094/**
1095 * igbvf_alloc_queues - Allocate memory for all rings
1096 * @adapter: board private structure to initialize
1097 **/
1098static int igbvf_alloc_queues(struct igbvf_adapter *adapter)
1099{
1100 struct net_device *netdev = adapter->netdev;
1101
1102 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1103 if (!adapter->tx_ring)
1104 return -ENOMEM;
1105
1106 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1107 if (!adapter->rx_ring) {
1108 kfree(adapter->tx_ring);
1109 return -ENOMEM;
1110 }
1111
1112 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1113
1114 return 0;
1115}
1116
1117/**
1118 * igbvf_request_irq - initialize interrupts
1119 * @adapter: board private structure
1120 *
1121 * Attempts to configure interrupts using the best available
1122 * capabilities of the hardware and kernel.
1123 **/
1124static int igbvf_request_irq(struct igbvf_adapter *adapter)
1125{
1126 int err = -1;
1127
1128 /* igbvf supports msi-x only */
1129 if (adapter->msix_entries)
1130 err = igbvf_request_msix(adapter);
1131
1132 if (!err)
1133 return err;
1134
1135 dev_err(&adapter->pdev->dev,
1136 "Unable to allocate interrupt, Error: %d\n", err);
1137
1138 return err;
1139}
1140
1141static void igbvf_free_irq(struct igbvf_adapter *adapter)
1142{
1143 struct net_device *netdev = adapter->netdev;
1144 int vector;
1145
1146 if (adapter->msix_entries) {
1147 for (vector = 0; vector < 3; vector++)
1148 free_irq(adapter->msix_entries[vector].vector, netdev);
1149 }
1150}
1151
1152/**
1153 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1154 * @adapter: board private structure
1155 **/
1156static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1157{
1158 struct e1000_hw *hw = &adapter->hw;
1159
1160 ew32(EIMC, ~0);
1161
1162 if (adapter->msix_entries)
1163 ew32(EIAC, 0);
1164}
1165
1166/**
1167 * igbvf_irq_enable - Enable default interrupt generation settings
1168 * @adapter: board private structure
1169 **/
1170static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1171{
1172 struct e1000_hw *hw = &adapter->hw;
1173
1174 ew32(EIAC, adapter->eims_enable_mask);
1175 ew32(EIAM, adapter->eims_enable_mask);
1176 ew32(EIMS, adapter->eims_enable_mask);
1177}
1178
1179/**
1180 * igbvf_poll - NAPI Rx polling callback
1181 * @napi: struct associated with this polling callback
1182 * @budget: amount of packets driver is allowed to process this poll
1183 **/
1184static int igbvf_poll(struct napi_struct *napi, int budget)
1185{
1186 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1187 struct igbvf_adapter *adapter = rx_ring->adapter;
1188 struct e1000_hw *hw = &adapter->hw;
1189 int work_done = 0;
1190
1191 igbvf_clean_rx_irq(adapter, &work_done, budget);
1192
1193 if (work_done == budget)
1194 return budget;
1195
1196 /* Exit the polling mode, but don't re-enable interrupts if stack might
1197 * poll us due to busy-polling
1198 */
1199 if (likely(napi_complete_done(napi, work_done))) {
1200 if (adapter->requested_itr & 3)
1201 igbvf_set_itr(adapter);
1202
1203 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1204 ew32(EIMS, adapter->rx_ring->eims_value);
1205 }
1206
1207 return work_done;
1208}
1209
1210/**
1211 * igbvf_set_rlpml - set receive large packet maximum length
1212 * @adapter: board private structure
1213 *
1214 * Configure the maximum size of packets that will be received
1215 */
1216static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1217{
1218 int max_frame_size;
1219 struct e1000_hw *hw = &adapter->hw;
1220
1221 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
1222
1223 spin_lock_bh(&hw->mbx_lock);
1224
1225 e1000_rlpml_set_vf(hw, max_frame_size);
1226
1227 spin_unlock_bh(&hw->mbx_lock);
1228}
1229
1230static int igbvf_vlan_rx_add_vid(struct net_device *netdev,
1231 __be16 proto, u16 vid)
1232{
1233 struct igbvf_adapter *adapter = netdev_priv(netdev);
1234 struct e1000_hw *hw = &adapter->hw;
1235
1236 spin_lock_bh(&hw->mbx_lock);
1237
1238 if (hw->mac.ops.set_vfta(hw, vid, true)) {
1239 dev_warn(&adapter->pdev->dev, "Vlan id %d\n is not added", vid);
1240 spin_unlock_bh(&hw->mbx_lock);
1241 return -EINVAL;
1242 }
1243
1244 spin_unlock_bh(&hw->mbx_lock);
1245
1246 set_bit(vid, adapter->active_vlans);
1247 return 0;
1248}
1249
1250static int igbvf_vlan_rx_kill_vid(struct net_device *netdev,
1251 __be16 proto, u16 vid)
1252{
1253 struct igbvf_adapter *adapter = netdev_priv(netdev);
1254 struct e1000_hw *hw = &adapter->hw;
1255
1256 spin_lock_bh(&hw->mbx_lock);
1257
1258 if (hw->mac.ops.set_vfta(hw, vid, false)) {
1259 dev_err(&adapter->pdev->dev,
1260 "Failed to remove vlan id %d\n", vid);
1261 spin_unlock_bh(&hw->mbx_lock);
1262 return -EINVAL;
1263 }
1264
1265 spin_unlock_bh(&hw->mbx_lock);
1266
1267 clear_bit(vid, adapter->active_vlans);
1268 return 0;
1269}
1270
1271static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1272{
1273 u16 vid;
1274
1275 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1276 igbvf_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
1277}
1278
1279/**
1280 * igbvf_configure_tx - Configure Transmit Unit after Reset
1281 * @adapter: board private structure
1282 *
1283 * Configure the Tx unit of the MAC after a reset.
1284 **/
1285static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1286{
1287 struct e1000_hw *hw = &adapter->hw;
1288 struct igbvf_ring *tx_ring = adapter->tx_ring;
1289 u64 tdba;
1290 u32 txdctl, dca_txctrl;
1291
1292 /* disable transmits */
1293 txdctl = er32(TXDCTL(0));
1294 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1295 e1e_flush();
1296 msleep(10);
1297
1298 /* Setup the HW Tx Head and Tail descriptor pointers */
1299 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1300 tdba = tx_ring->dma;
1301 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1302 ew32(TDBAH(0), (tdba >> 32));
1303 ew32(TDH(0), 0);
1304 ew32(TDT(0), 0);
1305 tx_ring->head = E1000_TDH(0);
1306 tx_ring->tail = E1000_TDT(0);
1307
1308 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1309 * MUST be delivered in order or it will completely screw up
1310 * our bookkeeping.
1311 */
1312 dca_txctrl = er32(DCA_TXCTRL(0));
1313 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1314 ew32(DCA_TXCTRL(0), dca_txctrl);
1315
1316 /* enable transmits */
1317 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1318 ew32(TXDCTL(0), txdctl);
1319
1320 /* Setup Transmit Descriptor Settings for eop descriptor */
1321 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1322
1323 /* enable Report Status bit */
1324 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1325}
1326
1327/**
1328 * igbvf_setup_srrctl - configure the receive control registers
1329 * @adapter: Board private structure
1330 **/
1331static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1332{
1333 struct e1000_hw *hw = &adapter->hw;
1334 u32 srrctl = 0;
1335
1336 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1337 E1000_SRRCTL_BSIZEHDR_MASK |
1338 E1000_SRRCTL_BSIZEPKT_MASK);
1339
1340 /* Enable queue drop to avoid head of line blocking */
1341 srrctl |= E1000_SRRCTL_DROP_EN;
1342
1343 /* Setup buffer sizes */
1344 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1345 E1000_SRRCTL_BSIZEPKT_SHIFT;
1346
1347 if (adapter->rx_buffer_len < 2048) {
1348 adapter->rx_ps_hdr_size = 0;
1349 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1350 } else {
1351 adapter->rx_ps_hdr_size = 128;
1352 srrctl |= adapter->rx_ps_hdr_size <<
1353 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1354 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1355 }
1356
1357 ew32(SRRCTL(0), srrctl);
1358}
1359
1360/**
1361 * igbvf_configure_rx - Configure Receive Unit after Reset
1362 * @adapter: board private structure
1363 *
1364 * Configure the Rx unit of the MAC after a reset.
1365 **/
1366static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1367{
1368 struct e1000_hw *hw = &adapter->hw;
1369 struct igbvf_ring *rx_ring = adapter->rx_ring;
1370 u64 rdba;
1371 u32 rxdctl;
1372
1373 /* disable receives */
1374 rxdctl = er32(RXDCTL(0));
1375 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1376 e1e_flush();
1377 msleep(10);
1378
1379 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1380 * the Base and Length of the Rx Descriptor Ring
1381 */
1382 rdba = rx_ring->dma;
1383 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1384 ew32(RDBAH(0), (rdba >> 32));
1385 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1386 rx_ring->head = E1000_RDH(0);
1387 rx_ring->tail = E1000_RDT(0);
1388 ew32(RDH(0), 0);
1389 ew32(RDT(0), 0);
1390
1391 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1392 rxdctl &= 0xFFF00000;
1393 rxdctl |= IGBVF_RX_PTHRESH;
1394 rxdctl |= IGBVF_RX_HTHRESH << 8;
1395 rxdctl |= IGBVF_RX_WTHRESH << 16;
1396
1397 igbvf_set_rlpml(adapter);
1398
1399 /* enable receives */
1400 ew32(RXDCTL(0), rxdctl);
1401}
1402
1403/**
1404 * igbvf_set_multi - Multicast and Promiscuous mode set
1405 * @netdev: network interface device structure
1406 *
1407 * The set_multi entry point is called whenever the multicast address
1408 * list or the network interface flags are updated. This routine is
1409 * responsible for configuring the hardware for proper multicast,
1410 * promiscuous mode, and all-multi behavior.
1411 **/
1412static void igbvf_set_multi(struct net_device *netdev)
1413{
1414 struct igbvf_adapter *adapter = netdev_priv(netdev);
1415 struct e1000_hw *hw = &adapter->hw;
1416 struct netdev_hw_addr *ha;
1417 u8 *mta_list = NULL;
1418 int i;
1419
1420 if (!netdev_mc_empty(netdev)) {
1421 mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN,
1422 GFP_ATOMIC);
1423 if (!mta_list)
1424 return;
1425 }
1426
1427 /* prepare a packed array of only addresses. */
1428 i = 0;
1429 netdev_for_each_mc_addr(ha, netdev)
1430 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
1431
1432 spin_lock_bh(&hw->mbx_lock);
1433
1434 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1435
1436 spin_unlock_bh(&hw->mbx_lock);
1437 kfree(mta_list);
1438}
1439
1440/**
1441 * igbvf_set_uni - Configure unicast MAC filters
1442 * @netdev: network interface device structure
1443 *
1444 * This routine is responsible for configuring the hardware for proper
1445 * unicast filters.
1446 **/
1447static int igbvf_set_uni(struct net_device *netdev)
1448{
1449 struct igbvf_adapter *adapter = netdev_priv(netdev);
1450 struct e1000_hw *hw = &adapter->hw;
1451
1452 if (netdev_uc_count(netdev) > IGBVF_MAX_MAC_FILTERS) {
1453 pr_err("Too many unicast filters - No Space\n");
1454 return -ENOSPC;
1455 }
1456
1457 spin_lock_bh(&hw->mbx_lock);
1458
1459 /* Clear all unicast MAC filters */
1460 hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_CLR, NULL);
1461
1462 spin_unlock_bh(&hw->mbx_lock);
1463
1464 if (!netdev_uc_empty(netdev)) {
1465 struct netdev_hw_addr *ha;
1466
1467 /* Add MAC filters one by one */
1468 netdev_for_each_uc_addr(ha, netdev) {
1469 spin_lock_bh(&hw->mbx_lock);
1470
1471 hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_ADD,
1472 ha->addr);
1473
1474 spin_unlock_bh(&hw->mbx_lock);
1475 udelay(200);
1476 }
1477 }
1478
1479 return 0;
1480}
1481
1482static void igbvf_set_rx_mode(struct net_device *netdev)
1483{
1484 igbvf_set_multi(netdev);
1485 igbvf_set_uni(netdev);
1486}
1487
1488/**
1489 * igbvf_configure - configure the hardware for Rx and Tx
1490 * @adapter: private board structure
1491 **/
1492static void igbvf_configure(struct igbvf_adapter *adapter)
1493{
1494 igbvf_set_rx_mode(adapter->netdev);
1495
1496 igbvf_restore_vlan(adapter);
1497
1498 igbvf_configure_tx(adapter);
1499 igbvf_setup_srrctl(adapter);
1500 igbvf_configure_rx(adapter);
1501 igbvf_alloc_rx_buffers(adapter->rx_ring,
1502 igbvf_desc_unused(adapter->rx_ring));
1503}
1504
1505/* igbvf_reset - bring the hardware into a known good state
1506 * @adapter: private board structure
1507 *
1508 * This function boots the hardware and enables some settings that
1509 * require a configuration cycle of the hardware - those cannot be
1510 * set/changed during runtime. After reset the device needs to be
1511 * properly configured for Rx, Tx etc.
1512 */
1513static void igbvf_reset(struct igbvf_adapter *adapter)
1514{
1515 struct e1000_mac_info *mac = &adapter->hw.mac;
1516 struct net_device *netdev = adapter->netdev;
1517 struct e1000_hw *hw = &adapter->hw;
1518
1519 spin_lock_bh(&hw->mbx_lock);
1520
1521 /* Allow time for pending master requests to run */
1522 if (mac->ops.reset_hw(hw))
1523 dev_warn(&adapter->pdev->dev, "PF still resetting\n");
1524
1525 mac->ops.init_hw(hw);
1526
1527 spin_unlock_bh(&hw->mbx_lock);
1528
1529 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1530 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1531 netdev->addr_len);
1532 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1533 netdev->addr_len);
1534 }
1535
1536 adapter->last_reset = jiffies;
1537}
1538
1539int igbvf_up(struct igbvf_adapter *adapter)
1540{
1541 struct e1000_hw *hw = &adapter->hw;
1542
1543 /* hardware has been reset, we need to reload some things */
1544 igbvf_configure(adapter);
1545
1546 clear_bit(__IGBVF_DOWN, &adapter->state);
1547
1548 napi_enable(&adapter->rx_ring->napi);
1549 if (adapter->msix_entries)
1550 igbvf_configure_msix(adapter);
1551
1552 /* Clear any pending interrupts. */
1553 er32(EICR);
1554 igbvf_irq_enable(adapter);
1555
1556 /* start the watchdog */
1557 hw->mac.get_link_status = 1;
1558 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1559
1560 return 0;
1561}
1562
1563void igbvf_down(struct igbvf_adapter *adapter)
1564{
1565 struct net_device *netdev = adapter->netdev;
1566 struct e1000_hw *hw = &adapter->hw;
1567 u32 rxdctl, txdctl;
1568
1569 /* signal that we're down so the interrupt handler does not
1570 * reschedule our watchdog timer
1571 */
1572 set_bit(__IGBVF_DOWN, &adapter->state);
1573
1574 /* disable receives in the hardware */
1575 rxdctl = er32(RXDCTL(0));
1576 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1577
1578 netif_carrier_off(netdev);
1579 netif_stop_queue(netdev);
1580
1581 /* disable transmits in the hardware */
1582 txdctl = er32(TXDCTL(0));
1583 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1584
1585 /* flush both disables and wait for them to finish */
1586 e1e_flush();
1587 msleep(10);
1588
1589 napi_disable(&adapter->rx_ring->napi);
1590
1591 igbvf_irq_disable(adapter);
1592
1593 del_timer_sync(&adapter->watchdog_timer);
1594
1595 /* record the stats before reset*/
1596 igbvf_update_stats(adapter);
1597
1598 adapter->link_speed = 0;
1599 adapter->link_duplex = 0;
1600
1601 igbvf_reset(adapter);
1602 igbvf_clean_tx_ring(adapter->tx_ring);
1603 igbvf_clean_rx_ring(adapter->rx_ring);
1604}
1605
1606void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1607{
1608 might_sleep();
1609 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1610 usleep_range(1000, 2000);
1611 igbvf_down(adapter);
1612 igbvf_up(adapter);
1613 clear_bit(__IGBVF_RESETTING, &adapter->state);
1614}
1615
1616/**
1617 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1618 * @adapter: board private structure to initialize
1619 *
1620 * igbvf_sw_init initializes the Adapter private data structure.
1621 * Fields are initialized based on PCI device information and
1622 * OS network device settings (MTU size).
1623 **/
1624static int igbvf_sw_init(struct igbvf_adapter *adapter)
1625{
1626 struct net_device *netdev = adapter->netdev;
1627 s32 rc;
1628
1629 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1630 adapter->rx_ps_hdr_size = 0;
1631 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1632 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1633
1634 adapter->tx_int_delay = 8;
1635 adapter->tx_abs_int_delay = 32;
1636 adapter->rx_int_delay = 0;
1637 adapter->rx_abs_int_delay = 8;
1638 adapter->requested_itr = 3;
1639 adapter->current_itr = IGBVF_START_ITR;
1640
1641 /* Set various function pointers */
1642 adapter->ei->init_ops(&adapter->hw);
1643
1644 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1645 if (rc)
1646 return rc;
1647
1648 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1649 if (rc)
1650 return rc;
1651
1652 igbvf_set_interrupt_capability(adapter);
1653
1654 if (igbvf_alloc_queues(adapter))
1655 return -ENOMEM;
1656
1657 spin_lock_init(&adapter->tx_queue_lock);
1658
1659 /* Explicitly disable IRQ since the NIC can be in any state. */
1660 igbvf_irq_disable(adapter);
1661
1662 spin_lock_init(&adapter->stats_lock);
1663 spin_lock_init(&adapter->hw.mbx_lock);
1664
1665 set_bit(__IGBVF_DOWN, &adapter->state);
1666 return 0;
1667}
1668
1669static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1670{
1671 struct e1000_hw *hw = &adapter->hw;
1672
1673 adapter->stats.last_gprc = er32(VFGPRC);
1674 adapter->stats.last_gorc = er32(VFGORC);
1675 adapter->stats.last_gptc = er32(VFGPTC);
1676 adapter->stats.last_gotc = er32(VFGOTC);
1677 adapter->stats.last_mprc = er32(VFMPRC);
1678 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1679 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1680 adapter->stats.last_gorlbc = er32(VFGORLBC);
1681 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1682
1683 adapter->stats.base_gprc = er32(VFGPRC);
1684 adapter->stats.base_gorc = er32(VFGORC);
1685 adapter->stats.base_gptc = er32(VFGPTC);
1686 adapter->stats.base_gotc = er32(VFGOTC);
1687 adapter->stats.base_mprc = er32(VFMPRC);
1688 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1689 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1690 adapter->stats.base_gorlbc = er32(VFGORLBC);
1691 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1692}
1693
1694/**
1695 * igbvf_open - Called when a network interface is made active
1696 * @netdev: network interface device structure
1697 *
1698 * Returns 0 on success, negative value on failure
1699 *
1700 * The open entry point is called when a network interface is made
1701 * active by the system (IFF_UP). At this point all resources needed
1702 * for transmit and receive operations are allocated, the interrupt
1703 * handler is registered with the OS, the watchdog timer is started,
1704 * and the stack is notified that the interface is ready.
1705 **/
1706static int igbvf_open(struct net_device *netdev)
1707{
1708 struct igbvf_adapter *adapter = netdev_priv(netdev);
1709 struct e1000_hw *hw = &adapter->hw;
1710 int err;
1711
1712 /* disallow open during test */
1713 if (test_bit(__IGBVF_TESTING, &adapter->state))
1714 return -EBUSY;
1715
1716 /* allocate transmit descriptors */
1717 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1718 if (err)
1719 goto err_setup_tx;
1720
1721 /* allocate receive descriptors */
1722 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1723 if (err)
1724 goto err_setup_rx;
1725
1726 /* before we allocate an interrupt, we must be ready to handle it.
1727 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1728 * as soon as we call pci_request_irq, so we have to setup our
1729 * clean_rx handler before we do so.
1730 */
1731 igbvf_configure(adapter);
1732
1733 err = igbvf_request_irq(adapter);
1734 if (err)
1735 goto err_req_irq;
1736
1737 /* From here on the code is the same as igbvf_up() */
1738 clear_bit(__IGBVF_DOWN, &adapter->state);
1739
1740 napi_enable(&adapter->rx_ring->napi);
1741
1742 /* clear any pending interrupts */
1743 er32(EICR);
1744
1745 igbvf_irq_enable(adapter);
1746
1747 /* start the watchdog */
1748 hw->mac.get_link_status = 1;
1749 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1750
1751 return 0;
1752
1753err_req_irq:
1754 igbvf_free_rx_resources(adapter->rx_ring);
1755err_setup_rx:
1756 igbvf_free_tx_resources(adapter->tx_ring);
1757err_setup_tx:
1758 igbvf_reset(adapter);
1759
1760 return err;
1761}
1762
1763/**
1764 * igbvf_close - Disables a network interface
1765 * @netdev: network interface device structure
1766 *
1767 * Returns 0, this is not allowed to fail
1768 *
1769 * The close entry point is called when an interface is de-activated
1770 * by the OS. The hardware is still under the drivers control, but
1771 * needs to be disabled. A global MAC reset is issued to stop the
1772 * hardware, and all transmit and receive resources are freed.
1773 **/
1774static int igbvf_close(struct net_device *netdev)
1775{
1776 struct igbvf_adapter *adapter = netdev_priv(netdev);
1777
1778 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1779 igbvf_down(adapter);
1780
1781 igbvf_free_irq(adapter);
1782
1783 igbvf_free_tx_resources(adapter->tx_ring);
1784 igbvf_free_rx_resources(adapter->rx_ring);
1785
1786 return 0;
1787}
1788
1789/**
1790 * igbvf_set_mac - Change the Ethernet Address of the NIC
1791 * @netdev: network interface device structure
1792 * @p: pointer to an address structure
1793 *
1794 * Returns 0 on success, negative on failure
1795 **/
1796static int igbvf_set_mac(struct net_device *netdev, void *p)
1797{
1798 struct igbvf_adapter *adapter = netdev_priv(netdev);
1799 struct e1000_hw *hw = &adapter->hw;
1800 struct sockaddr *addr = p;
1801
1802 if (!is_valid_ether_addr(addr->sa_data))
1803 return -EADDRNOTAVAIL;
1804
1805 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1806
1807 spin_lock_bh(&hw->mbx_lock);
1808
1809 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1810
1811 spin_unlock_bh(&hw->mbx_lock);
1812
1813 if (!ether_addr_equal(addr->sa_data, hw->mac.addr))
1814 return -EADDRNOTAVAIL;
1815
1816 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1817
1818 return 0;
1819}
1820
1821#define UPDATE_VF_COUNTER(reg, name) \
1822{ \
1823 u32 current_counter = er32(reg); \
1824 if (current_counter < adapter->stats.last_##name) \
1825 adapter->stats.name += 0x100000000LL; \
1826 adapter->stats.last_##name = current_counter; \
1827 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1828 adapter->stats.name |= current_counter; \
1829}
1830
1831/**
1832 * igbvf_update_stats - Update the board statistics counters
1833 * @adapter: board private structure
1834**/
1835void igbvf_update_stats(struct igbvf_adapter *adapter)
1836{
1837 struct e1000_hw *hw = &adapter->hw;
1838 struct pci_dev *pdev = adapter->pdev;
1839
1840 /* Prevent stats update while adapter is being reset, link is down
1841 * or if the pci connection is down.
1842 */
1843 if (adapter->link_speed == 0)
1844 return;
1845
1846 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1847 return;
1848
1849 if (pci_channel_offline(pdev))
1850 return;
1851
1852 UPDATE_VF_COUNTER(VFGPRC, gprc);
1853 UPDATE_VF_COUNTER(VFGORC, gorc);
1854 UPDATE_VF_COUNTER(VFGPTC, gptc);
1855 UPDATE_VF_COUNTER(VFGOTC, gotc);
1856 UPDATE_VF_COUNTER(VFMPRC, mprc);
1857 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1858 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1859 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1860 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1861
1862 /* Fill out the OS statistics structure */
1863 adapter->netdev->stats.multicast = adapter->stats.mprc;
1864}
1865
1866static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1867{
1868 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n",
1869 adapter->link_speed,
1870 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half");
1871}
1872
1873static bool igbvf_has_link(struct igbvf_adapter *adapter)
1874{
1875 struct e1000_hw *hw = &adapter->hw;
1876 s32 ret_val = E1000_SUCCESS;
1877 bool link_active;
1878
1879 /* If interface is down, stay link down */
1880 if (test_bit(__IGBVF_DOWN, &adapter->state))
1881 return false;
1882
1883 spin_lock_bh(&hw->mbx_lock);
1884
1885 ret_val = hw->mac.ops.check_for_link(hw);
1886
1887 spin_unlock_bh(&hw->mbx_lock);
1888
1889 link_active = !hw->mac.get_link_status;
1890
1891 /* if check for link returns error we will need to reset */
1892 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1893 schedule_work(&adapter->reset_task);
1894
1895 return link_active;
1896}
1897
1898/**
1899 * igbvf_watchdog - Timer Call-back
1900 * @t: timer list pointer containing private struct
1901 **/
1902static void igbvf_watchdog(struct timer_list *t)
1903{
1904 struct igbvf_adapter *adapter = from_timer(adapter, t, watchdog_timer);
1905
1906 /* Do the rest outside of interrupt context */
1907 schedule_work(&adapter->watchdog_task);
1908}
1909
1910static void igbvf_watchdog_task(struct work_struct *work)
1911{
1912 struct igbvf_adapter *adapter = container_of(work,
1913 struct igbvf_adapter,
1914 watchdog_task);
1915 struct net_device *netdev = adapter->netdev;
1916 struct e1000_mac_info *mac = &adapter->hw.mac;
1917 struct igbvf_ring *tx_ring = adapter->tx_ring;
1918 struct e1000_hw *hw = &adapter->hw;
1919 u32 link;
1920 int tx_pending = 0;
1921
1922 link = igbvf_has_link(adapter);
1923
1924 if (link) {
1925 if (!netif_carrier_ok(netdev)) {
1926 mac->ops.get_link_up_info(&adapter->hw,
1927 &adapter->link_speed,
1928 &adapter->link_duplex);
1929 igbvf_print_link_info(adapter);
1930
1931 netif_carrier_on(netdev);
1932 netif_wake_queue(netdev);
1933 }
1934 } else {
1935 if (netif_carrier_ok(netdev)) {
1936 adapter->link_speed = 0;
1937 adapter->link_duplex = 0;
1938 dev_info(&adapter->pdev->dev, "Link is Down\n");
1939 netif_carrier_off(netdev);
1940 netif_stop_queue(netdev);
1941 }
1942 }
1943
1944 if (netif_carrier_ok(netdev)) {
1945 igbvf_update_stats(adapter);
1946 } else {
1947 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1948 tx_ring->count);
1949 if (tx_pending) {
1950 /* We've lost link, so the controller stops DMA,
1951 * but we've got queued Tx work that's never going
1952 * to get done, so reset controller to flush Tx.
1953 * (Do the reset outside of interrupt context).
1954 */
1955 adapter->tx_timeout_count++;
1956 schedule_work(&adapter->reset_task);
1957 }
1958 }
1959
1960 /* Cause software interrupt to ensure Rx ring is cleaned */
1961 ew32(EICS, adapter->rx_ring->eims_value);
1962
1963 /* Reset the timer */
1964 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1965 mod_timer(&adapter->watchdog_timer,
1966 round_jiffies(jiffies + (2 * HZ)));
1967}
1968
1969#define IGBVF_TX_FLAGS_CSUM 0x00000001
1970#define IGBVF_TX_FLAGS_VLAN 0x00000002
1971#define IGBVF_TX_FLAGS_TSO 0x00000004
1972#define IGBVF_TX_FLAGS_IPV4 0x00000008
1973#define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1974#define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1975
1976static void igbvf_tx_ctxtdesc(struct igbvf_ring *tx_ring, u32 vlan_macip_lens,
1977 u32 type_tucmd, u32 mss_l4len_idx)
1978{
1979 struct e1000_adv_tx_context_desc *context_desc;
1980 struct igbvf_buffer *buffer_info;
1981 u16 i = tx_ring->next_to_use;
1982
1983 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1984 buffer_info = &tx_ring->buffer_info[i];
1985
1986 i++;
1987 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
1988
1989 /* set bits to identify this as an advanced context descriptor */
1990 type_tucmd |= E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT;
1991
1992 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
1993 context_desc->seqnum_seed = 0;
1994 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
1995 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1996
1997 buffer_info->time_stamp = jiffies;
1998 buffer_info->dma = 0;
1999}
2000
2001static int igbvf_tso(struct igbvf_ring *tx_ring,
2002 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2003{
2004 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
2005 union {
2006 struct iphdr *v4;
2007 struct ipv6hdr *v6;
2008 unsigned char *hdr;
2009 } ip;
2010 union {
2011 struct tcphdr *tcp;
2012 unsigned char *hdr;
2013 } l4;
2014 u32 paylen, l4_offset;
2015 int err;
2016
2017 if (skb->ip_summed != CHECKSUM_PARTIAL)
2018 return 0;
2019
2020 if (!skb_is_gso(skb))
2021 return 0;
2022
2023 err = skb_cow_head(skb, 0);
2024 if (err < 0)
2025 return err;
2026
2027 ip.hdr = skb_network_header(skb);
2028 l4.hdr = skb_checksum_start(skb);
2029
2030 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2031 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2032
2033 /* initialize outer IP header fields */
2034 if (ip.v4->version == 4) {
2035 unsigned char *csum_start = skb_checksum_start(skb);
2036 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
2037
2038 /* IP header will have to cancel out any data that
2039 * is not a part of the outer IP header
2040 */
2041 ip.v4->check = csum_fold(csum_partial(trans_start,
2042 csum_start - trans_start,
2043 0));
2044 type_tucmd |= E1000_ADVTXD_TUCMD_IPV4;
2045
2046 ip.v4->tot_len = 0;
2047 } else {
2048 ip.v6->payload_len = 0;
2049 }
2050
2051 /* determine offset of inner transport header */
2052 l4_offset = l4.hdr - skb->data;
2053
2054 /* compute length of segmentation header */
2055 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
2056
2057 /* remove payload length from inner checksum */
2058 paylen = skb->len - l4_offset;
2059 csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen));
2060
2061 /* MSS L4LEN IDX */
2062 mss_l4len_idx = (*hdr_len - l4_offset) << E1000_ADVTXD_L4LEN_SHIFT;
2063 mss_l4len_idx |= skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT;
2064
2065 /* VLAN MACLEN IPLEN */
2066 vlan_macip_lens = l4.hdr - ip.hdr;
2067 vlan_macip_lens |= (ip.hdr - skb->data) << E1000_ADVTXD_MACLEN_SHIFT;
2068 vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2069
2070 igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx);
2071
2072 return 1;
2073}
2074
2075static bool igbvf_tx_csum(struct igbvf_ring *tx_ring, struct sk_buff *skb,
2076 u32 tx_flags, __be16 protocol)
2077{
2078 u32 vlan_macip_lens = 0;
2079 u32 type_tucmd = 0;
2080
2081 if (skb->ip_summed != CHECKSUM_PARTIAL) {
2082csum_failed:
2083 if (!(tx_flags & IGBVF_TX_FLAGS_VLAN))
2084 return false;
2085 goto no_csum;
2086 }
2087
2088 switch (skb->csum_offset) {
2089 case offsetof(struct tcphdr, check):
2090 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2091 fallthrough;
2092 case offsetof(struct udphdr, check):
2093 break;
2094 case offsetof(struct sctphdr, checksum):
2095 /* validate that this is actually an SCTP request */
2096 if (skb_csum_is_sctp(skb)) {
2097 type_tucmd = E1000_ADVTXD_TUCMD_L4T_SCTP;
2098 break;
2099 }
2100 fallthrough;
2101 default:
2102 skb_checksum_help(skb);
2103 goto csum_failed;
2104 }
2105
2106 vlan_macip_lens = skb_checksum_start_offset(skb) -
2107 skb_network_offset(skb);
2108no_csum:
2109 vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT;
2110 vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2111
2112 igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, 0);
2113 return true;
2114}
2115
2116static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2117{
2118 struct igbvf_adapter *adapter = netdev_priv(netdev);
2119
2120 /* there is enough descriptors then we don't need to worry */
2121 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2122 return 0;
2123
2124 netif_stop_queue(netdev);
2125
2126 /* Herbert's original patch had:
2127 * smp_mb__after_netif_stop_queue();
2128 * but since that doesn't exist yet, just open code it.
2129 */
2130 smp_mb();
2131
2132 /* We need to check again just in case room has been made available */
2133 if (igbvf_desc_unused(adapter->tx_ring) < size)
2134 return -EBUSY;
2135
2136 netif_wake_queue(netdev);
2137
2138 ++adapter->restart_queue;
2139 return 0;
2140}
2141
2142#define IGBVF_MAX_TXD_PWR 16
2143#define IGBVF_MAX_DATA_PER_TXD (1u << IGBVF_MAX_TXD_PWR)
2144
2145static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2146 struct igbvf_ring *tx_ring,
2147 struct sk_buff *skb)
2148{
2149 struct igbvf_buffer *buffer_info;
2150 struct pci_dev *pdev = adapter->pdev;
2151 unsigned int len = skb_headlen(skb);
2152 unsigned int count = 0, i;
2153 unsigned int f;
2154
2155 i = tx_ring->next_to_use;
2156
2157 buffer_info = &tx_ring->buffer_info[i];
2158 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2159 buffer_info->length = len;
2160 /* set time_stamp *before* dma to help avoid a possible race */
2161 buffer_info->time_stamp = jiffies;
2162 buffer_info->mapped_as_page = false;
2163 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2164 DMA_TO_DEVICE);
2165 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2166 goto dma_error;
2167
2168 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2169 const skb_frag_t *frag;
2170
2171 count++;
2172 i++;
2173 if (i == tx_ring->count)
2174 i = 0;
2175
2176 frag = &skb_shinfo(skb)->frags[f];
2177 len = skb_frag_size(frag);
2178
2179 buffer_info = &tx_ring->buffer_info[i];
2180 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2181 buffer_info->length = len;
2182 buffer_info->time_stamp = jiffies;
2183 buffer_info->mapped_as_page = true;
2184 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len,
2185 DMA_TO_DEVICE);
2186 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2187 goto dma_error;
2188 }
2189
2190 tx_ring->buffer_info[i].skb = skb;
2191
2192 return ++count;
2193
2194dma_error:
2195 dev_err(&pdev->dev, "TX DMA map failed\n");
2196
2197 /* clear timestamp and dma mappings for failed buffer_info mapping */
2198 buffer_info->dma = 0;
2199 buffer_info->time_stamp = 0;
2200 buffer_info->length = 0;
2201 buffer_info->mapped_as_page = false;
2202 if (count)
2203 count--;
2204
2205 /* clear timestamp and dma mappings for remaining portion of packet */
2206 while (count--) {
2207 if (i == 0)
2208 i += tx_ring->count;
2209 i--;
2210 buffer_info = &tx_ring->buffer_info[i];
2211 igbvf_put_txbuf(adapter, buffer_info);
2212 }
2213
2214 return 0;
2215}
2216
2217static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2218 struct igbvf_ring *tx_ring,
2219 int tx_flags, int count,
2220 unsigned int first, u32 paylen,
2221 u8 hdr_len)
2222{
2223 union e1000_adv_tx_desc *tx_desc = NULL;
2224 struct igbvf_buffer *buffer_info;
2225 u32 olinfo_status = 0, cmd_type_len;
2226 unsigned int i;
2227
2228 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2229 E1000_ADVTXD_DCMD_DEXT);
2230
2231 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2232 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2233
2234 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2235 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2236
2237 /* insert tcp checksum */
2238 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2239
2240 /* insert ip checksum */
2241 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2242 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2243
2244 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2245 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2246 }
2247
2248 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2249
2250 i = tx_ring->next_to_use;
2251 while (count--) {
2252 buffer_info = &tx_ring->buffer_info[i];
2253 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2254 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2255 tx_desc->read.cmd_type_len =
2256 cpu_to_le32(cmd_type_len | buffer_info->length);
2257 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2258 i++;
2259 if (i == tx_ring->count)
2260 i = 0;
2261 }
2262
2263 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2264 /* Force memory writes to complete before letting h/w
2265 * know there are new descriptors to fetch. (Only
2266 * applicable for weak-ordered memory model archs,
2267 * such as IA-64).
2268 */
2269 wmb();
2270
2271 tx_ring->buffer_info[first].next_to_watch = tx_desc;
2272 tx_ring->next_to_use = i;
2273 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2274}
2275
2276static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2277 struct net_device *netdev,
2278 struct igbvf_ring *tx_ring)
2279{
2280 struct igbvf_adapter *adapter = netdev_priv(netdev);
2281 unsigned int first, tx_flags = 0;
2282 u8 hdr_len = 0;
2283 int count = 0;
2284 int tso = 0;
2285 __be16 protocol = vlan_get_protocol(skb);
2286
2287 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2288 dev_kfree_skb_any(skb);
2289 return NETDEV_TX_OK;
2290 }
2291
2292 if (skb->len <= 0) {
2293 dev_kfree_skb_any(skb);
2294 return NETDEV_TX_OK;
2295 }
2296
2297 /* need: count + 4 desc gap to keep tail from touching
2298 * + 2 desc gap to keep tail from touching head,
2299 * + 1 desc for skb->data,
2300 * + 1 desc for context descriptor,
2301 * head, otherwise try next time
2302 */
2303 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2304 /* this is a hard error */
2305 return NETDEV_TX_BUSY;
2306 }
2307
2308 if (skb_vlan_tag_present(skb)) {
2309 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2310 tx_flags |= (skb_vlan_tag_get(skb) <<
2311 IGBVF_TX_FLAGS_VLAN_SHIFT);
2312 }
2313
2314 if (protocol == htons(ETH_P_IP))
2315 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2316
2317 first = tx_ring->next_to_use;
2318
2319 tso = igbvf_tso(tx_ring, skb, tx_flags, &hdr_len);
2320 if (unlikely(tso < 0)) {
2321 dev_kfree_skb_any(skb);
2322 return NETDEV_TX_OK;
2323 }
2324
2325 if (tso)
2326 tx_flags |= IGBVF_TX_FLAGS_TSO;
2327 else if (igbvf_tx_csum(tx_ring, skb, tx_flags, protocol) &&
2328 (skb->ip_summed == CHECKSUM_PARTIAL))
2329 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2330
2331 /* count reflects descriptors mapped, if 0 then mapping error
2332 * has occurred and we need to rewind the descriptor queue
2333 */
2334 count = igbvf_tx_map_adv(adapter, tx_ring, skb);
2335
2336 if (count) {
2337 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2338 first, skb->len, hdr_len);
2339 /* Make sure there is space in the ring for the next send. */
2340 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2341 } else {
2342 dev_kfree_skb_any(skb);
2343 tx_ring->buffer_info[first].time_stamp = 0;
2344 tx_ring->next_to_use = first;
2345 }
2346
2347 return NETDEV_TX_OK;
2348}
2349
2350static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2351 struct net_device *netdev)
2352{
2353 struct igbvf_adapter *adapter = netdev_priv(netdev);
2354 struct igbvf_ring *tx_ring;
2355
2356 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2357 dev_kfree_skb_any(skb);
2358 return NETDEV_TX_OK;
2359 }
2360
2361 tx_ring = &adapter->tx_ring[0];
2362
2363 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2364}
2365
2366/**
2367 * igbvf_tx_timeout - Respond to a Tx Hang
2368 * @netdev: network interface device structure
2369 * @txqueue: queue timing out (unused)
2370 **/
2371static void igbvf_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)
2372{
2373 struct igbvf_adapter *adapter = netdev_priv(netdev);
2374
2375 /* Do the reset outside of interrupt context */
2376 adapter->tx_timeout_count++;
2377 schedule_work(&adapter->reset_task);
2378}
2379
2380static void igbvf_reset_task(struct work_struct *work)
2381{
2382 struct igbvf_adapter *adapter;
2383
2384 adapter = container_of(work, struct igbvf_adapter, reset_task);
2385
2386 igbvf_reinit_locked(adapter);
2387}
2388
2389/**
2390 * igbvf_change_mtu - Change the Maximum Transfer Unit
2391 * @netdev: network interface device structure
2392 * @new_mtu: new value for maximum frame size
2393 *
2394 * Returns 0 on success, negative on failure
2395 **/
2396static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2397{
2398 struct igbvf_adapter *adapter = netdev_priv(netdev);
2399 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2400
2401 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2402 usleep_range(1000, 2000);
2403 /* igbvf_down has a dependency on max_frame_size */
2404 adapter->max_frame_size = max_frame;
2405 if (netif_running(netdev))
2406 igbvf_down(adapter);
2407
2408 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2409 * means we reserve 2 more, this pushes us to allocate from the next
2410 * larger slab size.
2411 * i.e. RXBUFFER_2048 --> size-4096 slab
2412 * However with the new *_jumbo_rx* routines, jumbo receives will use
2413 * fragmented skbs
2414 */
2415
2416 if (max_frame <= 1024)
2417 adapter->rx_buffer_len = 1024;
2418 else if (max_frame <= 2048)
2419 adapter->rx_buffer_len = 2048;
2420 else
2421#if (PAGE_SIZE / 2) > 16384
2422 adapter->rx_buffer_len = 16384;
2423#else
2424 adapter->rx_buffer_len = PAGE_SIZE / 2;
2425#endif
2426
2427 /* adjust allocation if LPE protects us, and we aren't using SBP */
2428 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2429 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2430 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2431 ETH_FCS_LEN;
2432
2433 netdev_dbg(netdev, "changing MTU from %d to %d\n",
2434 netdev->mtu, new_mtu);
2435 netdev->mtu = new_mtu;
2436
2437 if (netif_running(netdev))
2438 igbvf_up(adapter);
2439 else
2440 igbvf_reset(adapter);
2441
2442 clear_bit(__IGBVF_RESETTING, &adapter->state);
2443
2444 return 0;
2445}
2446
2447static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2448{
2449 switch (cmd) {
2450 default:
2451 return -EOPNOTSUPP;
2452 }
2453}
2454
2455static int igbvf_suspend(struct device *dev_d)
2456{
2457 struct net_device *netdev = dev_get_drvdata(dev_d);
2458 struct igbvf_adapter *adapter = netdev_priv(netdev);
2459
2460 netif_device_detach(netdev);
2461
2462 if (netif_running(netdev)) {
2463 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2464 igbvf_down(adapter);
2465 igbvf_free_irq(adapter);
2466 }
2467
2468 return 0;
2469}
2470
2471static int __maybe_unused igbvf_resume(struct device *dev_d)
2472{
2473 struct pci_dev *pdev = to_pci_dev(dev_d);
2474 struct net_device *netdev = pci_get_drvdata(pdev);
2475 struct igbvf_adapter *adapter = netdev_priv(netdev);
2476 u32 err;
2477
2478 pci_set_master(pdev);
2479
2480 if (netif_running(netdev)) {
2481 err = igbvf_request_irq(adapter);
2482 if (err)
2483 return err;
2484 }
2485
2486 igbvf_reset(adapter);
2487
2488 if (netif_running(netdev))
2489 igbvf_up(adapter);
2490
2491 netif_device_attach(netdev);
2492
2493 return 0;
2494}
2495
2496static void igbvf_shutdown(struct pci_dev *pdev)
2497{
2498 igbvf_suspend(&pdev->dev);
2499}
2500
2501#ifdef CONFIG_NET_POLL_CONTROLLER
2502/* Polling 'interrupt' - used by things like netconsole to send skbs
2503 * without having to re-enable interrupts. It's not called while
2504 * the interrupt routine is executing.
2505 */
2506static void igbvf_netpoll(struct net_device *netdev)
2507{
2508 struct igbvf_adapter *adapter = netdev_priv(netdev);
2509
2510 disable_irq(adapter->pdev->irq);
2511
2512 igbvf_clean_tx_irq(adapter->tx_ring);
2513
2514 enable_irq(adapter->pdev->irq);
2515}
2516#endif
2517
2518/**
2519 * igbvf_io_error_detected - called when PCI error is detected
2520 * @pdev: Pointer to PCI device
2521 * @state: The current pci connection state
2522 *
2523 * This function is called after a PCI bus error affecting
2524 * this device has been detected.
2525 */
2526static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2527 pci_channel_state_t state)
2528{
2529 struct net_device *netdev = pci_get_drvdata(pdev);
2530 struct igbvf_adapter *adapter = netdev_priv(netdev);
2531
2532 netif_device_detach(netdev);
2533
2534 if (state == pci_channel_io_perm_failure)
2535 return PCI_ERS_RESULT_DISCONNECT;
2536
2537 if (netif_running(netdev))
2538 igbvf_down(adapter);
2539 pci_disable_device(pdev);
2540
2541 /* Request a slot slot reset. */
2542 return PCI_ERS_RESULT_NEED_RESET;
2543}
2544
2545/**
2546 * igbvf_io_slot_reset - called after the pci bus has been reset.
2547 * @pdev: Pointer to PCI device
2548 *
2549 * Restart the card from scratch, as if from a cold-boot. Implementation
2550 * resembles the first-half of the igbvf_resume routine.
2551 */
2552static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2553{
2554 struct net_device *netdev = pci_get_drvdata(pdev);
2555 struct igbvf_adapter *adapter = netdev_priv(netdev);
2556
2557 if (pci_enable_device_mem(pdev)) {
2558 dev_err(&pdev->dev,
2559 "Cannot re-enable PCI device after reset.\n");
2560 return PCI_ERS_RESULT_DISCONNECT;
2561 }
2562 pci_set_master(pdev);
2563
2564 igbvf_reset(adapter);
2565
2566 return PCI_ERS_RESULT_RECOVERED;
2567}
2568
2569/**
2570 * igbvf_io_resume - called when traffic can start flowing again.
2571 * @pdev: Pointer to PCI device
2572 *
2573 * This callback is called when the error recovery driver tells us that
2574 * its OK to resume normal operation. Implementation resembles the
2575 * second-half of the igbvf_resume routine.
2576 */
2577static void igbvf_io_resume(struct pci_dev *pdev)
2578{
2579 struct net_device *netdev = pci_get_drvdata(pdev);
2580 struct igbvf_adapter *adapter = netdev_priv(netdev);
2581
2582 if (netif_running(netdev)) {
2583 if (igbvf_up(adapter)) {
2584 dev_err(&pdev->dev,
2585 "can't bring device back up after reset\n");
2586 return;
2587 }
2588 }
2589
2590 netif_device_attach(netdev);
2591}
2592
2593static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2594{
2595 struct e1000_hw *hw = &adapter->hw;
2596 struct net_device *netdev = adapter->netdev;
2597 struct pci_dev *pdev = adapter->pdev;
2598
2599 if (hw->mac.type == e1000_vfadapt_i350)
2600 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n");
2601 else
2602 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2603 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2604}
2605
2606static int igbvf_set_features(struct net_device *netdev,
2607 netdev_features_t features)
2608{
2609 struct igbvf_adapter *adapter = netdev_priv(netdev);
2610
2611 if (features & NETIF_F_RXCSUM)
2612 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED;
2613 else
2614 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED;
2615
2616 return 0;
2617}
2618
2619#define IGBVF_MAX_MAC_HDR_LEN 127
2620#define IGBVF_MAX_NETWORK_HDR_LEN 511
2621
2622static netdev_features_t
2623igbvf_features_check(struct sk_buff *skb, struct net_device *dev,
2624 netdev_features_t features)
2625{
2626 unsigned int network_hdr_len, mac_hdr_len;
2627
2628 /* Make certain the headers can be described by a context descriptor */
2629 mac_hdr_len = skb_network_header(skb) - skb->data;
2630 if (unlikely(mac_hdr_len > IGBVF_MAX_MAC_HDR_LEN))
2631 return features & ~(NETIF_F_HW_CSUM |
2632 NETIF_F_SCTP_CRC |
2633 NETIF_F_HW_VLAN_CTAG_TX |
2634 NETIF_F_TSO |
2635 NETIF_F_TSO6);
2636
2637 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
2638 if (unlikely(network_hdr_len > IGBVF_MAX_NETWORK_HDR_LEN))
2639 return features & ~(NETIF_F_HW_CSUM |
2640 NETIF_F_SCTP_CRC |
2641 NETIF_F_TSO |
2642 NETIF_F_TSO6);
2643
2644 /* We can only support IPV4 TSO in tunnels if we can mangle the
2645 * inner IP ID field, so strip TSO if MANGLEID is not supported.
2646 */
2647 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
2648 features &= ~NETIF_F_TSO;
2649
2650 return features;
2651}
2652
2653static const struct net_device_ops igbvf_netdev_ops = {
2654 .ndo_open = igbvf_open,
2655 .ndo_stop = igbvf_close,
2656 .ndo_start_xmit = igbvf_xmit_frame,
2657 .ndo_set_rx_mode = igbvf_set_rx_mode,
2658 .ndo_set_mac_address = igbvf_set_mac,
2659 .ndo_change_mtu = igbvf_change_mtu,
2660 .ndo_do_ioctl = igbvf_ioctl,
2661 .ndo_tx_timeout = igbvf_tx_timeout,
2662 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2663 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2664#ifdef CONFIG_NET_POLL_CONTROLLER
2665 .ndo_poll_controller = igbvf_netpoll,
2666#endif
2667 .ndo_set_features = igbvf_set_features,
2668 .ndo_features_check = igbvf_features_check,
2669};
2670
2671/**
2672 * igbvf_probe - Device Initialization Routine
2673 * @pdev: PCI device information struct
2674 * @ent: entry in igbvf_pci_tbl
2675 *
2676 * Returns 0 on success, negative on failure
2677 *
2678 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2679 * The OS initialization, configuring of the adapter private structure,
2680 * and a hardware reset occur.
2681 **/
2682static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2683{
2684 struct net_device *netdev;
2685 struct igbvf_adapter *adapter;
2686 struct e1000_hw *hw;
2687 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2688
2689 static int cards_found;
2690 int err, pci_using_dac;
2691
2692 err = pci_enable_device_mem(pdev);
2693 if (err)
2694 return err;
2695
2696 pci_using_dac = 0;
2697 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2698 if (!err) {
2699 pci_using_dac = 1;
2700 } else {
2701 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2702 if (err) {
2703 dev_err(&pdev->dev,
2704 "No usable DMA configuration, aborting\n");
2705 goto err_dma;
2706 }
2707 }
2708
2709 err = pci_request_regions(pdev, igbvf_driver_name);
2710 if (err)
2711 goto err_pci_reg;
2712
2713 pci_set_master(pdev);
2714
2715 err = -ENOMEM;
2716 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2717 if (!netdev)
2718 goto err_alloc_etherdev;
2719
2720 SET_NETDEV_DEV(netdev, &pdev->dev);
2721
2722 pci_set_drvdata(pdev, netdev);
2723 adapter = netdev_priv(netdev);
2724 hw = &adapter->hw;
2725 adapter->netdev = netdev;
2726 adapter->pdev = pdev;
2727 adapter->ei = ei;
2728 adapter->pba = ei->pba;
2729 adapter->flags = ei->flags;
2730 adapter->hw.back = adapter;
2731 adapter->hw.mac.type = ei->mac;
2732 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2733
2734 /* PCI config space info */
2735
2736 hw->vendor_id = pdev->vendor;
2737 hw->device_id = pdev->device;
2738 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2739 hw->subsystem_device_id = pdev->subsystem_device;
2740 hw->revision_id = pdev->revision;
2741
2742 err = -EIO;
2743 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2744 pci_resource_len(pdev, 0));
2745
2746 if (!adapter->hw.hw_addr)
2747 goto err_ioremap;
2748
2749 if (ei->get_variants) {
2750 err = ei->get_variants(adapter);
2751 if (err)
2752 goto err_get_variants;
2753 }
2754
2755 /* setup adapter struct */
2756 err = igbvf_sw_init(adapter);
2757 if (err)
2758 goto err_sw_init;
2759
2760 /* construct the net_device struct */
2761 netdev->netdev_ops = &igbvf_netdev_ops;
2762
2763 igbvf_set_ethtool_ops(netdev);
2764 netdev->watchdog_timeo = 5 * HZ;
2765 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2766
2767 adapter->bd_number = cards_found++;
2768
2769 netdev->hw_features = NETIF_F_SG |
2770 NETIF_F_TSO |
2771 NETIF_F_TSO6 |
2772 NETIF_F_RXCSUM |
2773 NETIF_F_HW_CSUM |
2774 NETIF_F_SCTP_CRC;
2775
2776#define IGBVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
2777 NETIF_F_GSO_GRE_CSUM | \
2778 NETIF_F_GSO_IPXIP4 | \
2779 NETIF_F_GSO_IPXIP6 | \
2780 NETIF_F_GSO_UDP_TUNNEL | \
2781 NETIF_F_GSO_UDP_TUNNEL_CSUM)
2782
2783 netdev->gso_partial_features = IGBVF_GSO_PARTIAL_FEATURES;
2784 netdev->hw_features |= NETIF_F_GSO_PARTIAL |
2785 IGBVF_GSO_PARTIAL_FEATURES;
2786
2787 netdev->features = netdev->hw_features;
2788
2789 if (pci_using_dac)
2790 netdev->features |= NETIF_F_HIGHDMA;
2791
2792 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
2793 netdev->mpls_features |= NETIF_F_HW_CSUM;
2794 netdev->hw_enc_features |= netdev->vlan_features;
2795
2796 /* set this bit last since it cannot be part of vlan_features */
2797 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
2798 NETIF_F_HW_VLAN_CTAG_RX |
2799 NETIF_F_HW_VLAN_CTAG_TX;
2800
2801 /* MTU range: 68 - 9216 */
2802 netdev->min_mtu = ETH_MIN_MTU;
2803 netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE;
2804
2805 spin_lock_bh(&hw->mbx_lock);
2806
2807 /*reset the controller to put the device in a known good state */
2808 err = hw->mac.ops.reset_hw(hw);
2809 if (err) {
2810 dev_info(&pdev->dev,
2811 "PF still in reset state. Is the PF interface up?\n");
2812 } else {
2813 err = hw->mac.ops.read_mac_addr(hw);
2814 if (err)
2815 dev_info(&pdev->dev, "Error reading MAC address.\n");
2816 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2817 dev_info(&pdev->dev,
2818 "MAC address not assigned by administrator.\n");
2819 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
2820 netdev->addr_len);
2821 }
2822
2823 spin_unlock_bh(&hw->mbx_lock);
2824
2825 if (!is_valid_ether_addr(netdev->dev_addr)) {
2826 dev_info(&pdev->dev, "Assigning random MAC address.\n");
2827 eth_hw_addr_random(netdev);
2828 memcpy(adapter->hw.mac.addr, netdev->dev_addr,
2829 netdev->addr_len);
2830 }
2831
2832 timer_setup(&adapter->watchdog_timer, igbvf_watchdog, 0);
2833
2834 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2835 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2836
2837 /* ring size defaults */
2838 adapter->rx_ring->count = 1024;
2839 adapter->tx_ring->count = 1024;
2840
2841 /* reset the hardware with the new settings */
2842 igbvf_reset(adapter);
2843
2844 /* set hardware-specific flags */
2845 if (adapter->hw.mac.type == e1000_vfadapt_i350)
2846 adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP;
2847
2848 strcpy(netdev->name, "eth%d");
2849 err = register_netdev(netdev);
2850 if (err)
2851 goto err_hw_init;
2852
2853 /* tell the stack to leave us alone until igbvf_open() is called */
2854 netif_carrier_off(netdev);
2855 netif_stop_queue(netdev);
2856
2857 igbvf_print_device_info(adapter);
2858
2859 igbvf_initialize_last_counter_stats(adapter);
2860
2861 return 0;
2862
2863err_hw_init:
2864 kfree(adapter->tx_ring);
2865 kfree(adapter->rx_ring);
2866err_sw_init:
2867 igbvf_reset_interrupt_capability(adapter);
2868err_get_variants:
2869 iounmap(adapter->hw.hw_addr);
2870err_ioremap:
2871 free_netdev(netdev);
2872err_alloc_etherdev:
2873 pci_release_regions(pdev);
2874err_pci_reg:
2875err_dma:
2876 pci_disable_device(pdev);
2877 return err;
2878}
2879
2880/**
2881 * igbvf_remove - Device Removal Routine
2882 * @pdev: PCI device information struct
2883 *
2884 * igbvf_remove is called by the PCI subsystem to alert the driver
2885 * that it should release a PCI device. The could be caused by a
2886 * Hot-Plug event, or because the driver is going to be removed from
2887 * memory.
2888 **/
2889static void igbvf_remove(struct pci_dev *pdev)
2890{
2891 struct net_device *netdev = pci_get_drvdata(pdev);
2892 struct igbvf_adapter *adapter = netdev_priv(netdev);
2893 struct e1000_hw *hw = &adapter->hw;
2894
2895 /* The watchdog timer may be rescheduled, so explicitly
2896 * disable it from being rescheduled.
2897 */
2898 set_bit(__IGBVF_DOWN, &adapter->state);
2899 del_timer_sync(&adapter->watchdog_timer);
2900
2901 cancel_work_sync(&adapter->reset_task);
2902 cancel_work_sync(&adapter->watchdog_task);
2903
2904 unregister_netdev(netdev);
2905
2906 igbvf_reset_interrupt_capability(adapter);
2907
2908 /* it is important to delete the NAPI struct prior to freeing the
2909 * Rx ring so that you do not end up with null pointer refs
2910 */
2911 netif_napi_del(&adapter->rx_ring->napi);
2912 kfree(adapter->tx_ring);
2913 kfree(adapter->rx_ring);
2914
2915 iounmap(hw->hw_addr);
2916 if (hw->flash_address)
2917 iounmap(hw->flash_address);
2918 pci_release_regions(pdev);
2919
2920 free_netdev(netdev);
2921
2922 pci_disable_device(pdev);
2923}
2924
2925/* PCI Error Recovery (ERS) */
2926static const struct pci_error_handlers igbvf_err_handler = {
2927 .error_detected = igbvf_io_error_detected,
2928 .slot_reset = igbvf_io_slot_reset,
2929 .resume = igbvf_io_resume,
2930};
2931
2932static const struct pci_device_id igbvf_pci_tbl[] = {
2933 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2934 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
2935 { } /* terminate list */
2936};
2937MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2938
2939static SIMPLE_DEV_PM_OPS(igbvf_pm_ops, igbvf_suspend, igbvf_resume);
2940
2941/* PCI Device API Driver */
2942static struct pci_driver igbvf_driver = {
2943 .name = igbvf_driver_name,
2944 .id_table = igbvf_pci_tbl,
2945 .probe = igbvf_probe,
2946 .remove = igbvf_remove,
2947 .driver.pm = &igbvf_pm_ops,
2948 .shutdown = igbvf_shutdown,
2949 .err_handler = &igbvf_err_handler
2950};
2951
2952/**
2953 * igbvf_init_module - Driver Registration Routine
2954 *
2955 * igbvf_init_module is the first routine called when the driver is
2956 * loaded. All it does is register with the PCI subsystem.
2957 **/
2958static int __init igbvf_init_module(void)
2959{
2960 int ret;
2961
2962 pr_info("%s\n", igbvf_driver_string);
2963 pr_info("%s\n", igbvf_copyright);
2964
2965 ret = pci_register_driver(&igbvf_driver);
2966
2967 return ret;
2968}
2969module_init(igbvf_init_module);
2970
2971/**
2972 * igbvf_exit_module - Driver Exit Cleanup Routine
2973 *
2974 * igbvf_exit_module is called just before the driver is removed
2975 * from memory.
2976 **/
2977static void __exit igbvf_exit_module(void)
2978{
2979 pci_unregister_driver(&igbvf_driver);
2980}
2981module_exit(igbvf_exit_module);
2982
2983MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2984MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
2985MODULE_LICENSE("GPL v2");
2986
2987/* netdev.c */
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2009 - 2018 Intel Corporation. */
3
4#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
5
6#include <linux/module.h>
7#include <linux/types.h>
8#include <linux/init.h>
9#include <linux/pci.h>
10#include <linux/vmalloc.h>
11#include <linux/pagemap.h>
12#include <linux/delay.h>
13#include <linux/netdevice.h>
14#include <linux/tcp.h>
15#include <linux/ipv6.h>
16#include <linux/slab.h>
17#include <net/checksum.h>
18#include <net/ip6_checksum.h>
19#include <linux/mii.h>
20#include <linux/ethtool.h>
21#include <linux/if_vlan.h>
22#include <linux/prefetch.h>
23#include <linux/sctp.h>
24
25#include "igbvf.h"
26
27char igbvf_driver_name[] = "igbvf";
28static const char igbvf_driver_string[] =
29 "Intel(R) Gigabit Virtual Function Network Driver";
30static const char igbvf_copyright[] =
31 "Copyright (c) 2009 - 2012 Intel Corporation.";
32
33#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
34static int debug = -1;
35module_param(debug, int, 0);
36MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
37
38static int igbvf_poll(struct napi_struct *napi, int budget);
39static void igbvf_reset(struct igbvf_adapter *);
40static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
41static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
42
43static struct igbvf_info igbvf_vf_info = {
44 .mac = e1000_vfadapt,
45 .flags = 0,
46 .pba = 10,
47 .init_ops = e1000_init_function_pointers_vf,
48};
49
50static struct igbvf_info igbvf_i350_vf_info = {
51 .mac = e1000_vfadapt_i350,
52 .flags = 0,
53 .pba = 10,
54 .init_ops = e1000_init_function_pointers_vf,
55};
56
57static const struct igbvf_info *igbvf_info_tbl[] = {
58 [board_vf] = &igbvf_vf_info,
59 [board_i350_vf] = &igbvf_i350_vf_info,
60};
61
62/**
63 * igbvf_desc_unused - calculate if we have unused descriptors
64 * @rx_ring: address of receive ring structure
65 **/
66static int igbvf_desc_unused(struct igbvf_ring *ring)
67{
68 if (ring->next_to_clean > ring->next_to_use)
69 return ring->next_to_clean - ring->next_to_use - 1;
70
71 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
72}
73
74/**
75 * igbvf_receive_skb - helper function to handle Rx indications
76 * @adapter: board private structure
77 * @status: descriptor status field as written by hardware
78 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
79 * @skb: pointer to sk_buff to be indicated to stack
80 **/
81static void igbvf_receive_skb(struct igbvf_adapter *adapter,
82 struct net_device *netdev,
83 struct sk_buff *skb,
84 u32 status, u16 vlan)
85{
86 u16 vid;
87
88 if (status & E1000_RXD_STAT_VP) {
89 if ((adapter->flags & IGBVF_FLAG_RX_LB_VLAN_BSWAP) &&
90 (status & E1000_RXDEXT_STATERR_LB))
91 vid = be16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
92 else
93 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
94 if (test_bit(vid, adapter->active_vlans))
95 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
96 }
97
98 napi_gro_receive(&adapter->rx_ring->napi, skb);
99}
100
101static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
102 u32 status_err, struct sk_buff *skb)
103{
104 skb_checksum_none_assert(skb);
105
106 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
107 if ((status_err & E1000_RXD_STAT_IXSM) ||
108 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
109 return;
110
111 /* TCP/UDP checksum error bit is set */
112 if (status_err &
113 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
114 /* let the stack verify checksum errors */
115 adapter->hw_csum_err++;
116 return;
117 }
118
119 /* It must be a TCP or UDP packet with a valid checksum */
120 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
121 skb->ip_summed = CHECKSUM_UNNECESSARY;
122
123 adapter->hw_csum_good++;
124}
125
126/**
127 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
128 * @rx_ring: address of ring structure to repopulate
129 * @cleaned_count: number of buffers to repopulate
130 **/
131static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
132 int cleaned_count)
133{
134 struct igbvf_adapter *adapter = rx_ring->adapter;
135 struct net_device *netdev = adapter->netdev;
136 struct pci_dev *pdev = adapter->pdev;
137 union e1000_adv_rx_desc *rx_desc;
138 struct igbvf_buffer *buffer_info;
139 struct sk_buff *skb;
140 unsigned int i;
141 int bufsz;
142
143 i = rx_ring->next_to_use;
144 buffer_info = &rx_ring->buffer_info[i];
145
146 if (adapter->rx_ps_hdr_size)
147 bufsz = adapter->rx_ps_hdr_size;
148 else
149 bufsz = adapter->rx_buffer_len;
150
151 while (cleaned_count--) {
152 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
153
154 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
155 if (!buffer_info->page) {
156 buffer_info->page = alloc_page(GFP_ATOMIC);
157 if (!buffer_info->page) {
158 adapter->alloc_rx_buff_failed++;
159 goto no_buffers;
160 }
161 buffer_info->page_offset = 0;
162 } else {
163 buffer_info->page_offset ^= PAGE_SIZE / 2;
164 }
165 buffer_info->page_dma =
166 dma_map_page(&pdev->dev, buffer_info->page,
167 buffer_info->page_offset,
168 PAGE_SIZE / 2,
169 DMA_FROM_DEVICE);
170 if (dma_mapping_error(&pdev->dev,
171 buffer_info->page_dma)) {
172 __free_page(buffer_info->page);
173 buffer_info->page = NULL;
174 dev_err(&pdev->dev, "RX DMA map failed\n");
175 break;
176 }
177 }
178
179 if (!buffer_info->skb) {
180 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
181 if (!skb) {
182 adapter->alloc_rx_buff_failed++;
183 goto no_buffers;
184 }
185
186 buffer_info->skb = skb;
187 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
188 bufsz,
189 DMA_FROM_DEVICE);
190 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
191 dev_kfree_skb(buffer_info->skb);
192 buffer_info->skb = NULL;
193 dev_err(&pdev->dev, "RX DMA map failed\n");
194 goto no_buffers;
195 }
196 }
197 /* Refresh the desc even if buffer_addrs didn't change because
198 * each write-back erases this info.
199 */
200 if (adapter->rx_ps_hdr_size) {
201 rx_desc->read.pkt_addr =
202 cpu_to_le64(buffer_info->page_dma);
203 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
204 } else {
205 rx_desc->read.pkt_addr = cpu_to_le64(buffer_info->dma);
206 rx_desc->read.hdr_addr = 0;
207 }
208
209 i++;
210 if (i == rx_ring->count)
211 i = 0;
212 buffer_info = &rx_ring->buffer_info[i];
213 }
214
215no_buffers:
216 if (rx_ring->next_to_use != i) {
217 rx_ring->next_to_use = i;
218 if (i == 0)
219 i = (rx_ring->count - 1);
220 else
221 i--;
222
223 /* Force memory writes to complete before letting h/w
224 * know there are new descriptors to fetch. (Only
225 * applicable for weak-ordered memory model archs,
226 * such as IA-64).
227 */
228 wmb();
229 writel(i, adapter->hw.hw_addr + rx_ring->tail);
230 }
231}
232
233/**
234 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
235 * @adapter: board private structure
236 *
237 * the return value indicates whether actual cleaning was done, there
238 * is no guarantee that everything was cleaned
239 **/
240static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
241 int *work_done, int work_to_do)
242{
243 struct igbvf_ring *rx_ring = adapter->rx_ring;
244 struct net_device *netdev = adapter->netdev;
245 struct pci_dev *pdev = adapter->pdev;
246 union e1000_adv_rx_desc *rx_desc, *next_rxd;
247 struct igbvf_buffer *buffer_info, *next_buffer;
248 struct sk_buff *skb;
249 bool cleaned = false;
250 int cleaned_count = 0;
251 unsigned int total_bytes = 0, total_packets = 0;
252 unsigned int i;
253 u32 length, hlen, staterr;
254
255 i = rx_ring->next_to_clean;
256 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
257 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
258
259 while (staterr & E1000_RXD_STAT_DD) {
260 if (*work_done >= work_to_do)
261 break;
262 (*work_done)++;
263 rmb(); /* read descriptor and rx_buffer_info after status DD */
264
265 buffer_info = &rx_ring->buffer_info[i];
266
267 /* HW will not DMA in data larger than the given buffer, even
268 * if it parses the (NFS, of course) header to be larger. In
269 * that case, it fills the header buffer and spills the rest
270 * into the page.
271 */
272 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info)
273 & E1000_RXDADV_HDRBUFLEN_MASK) >>
274 E1000_RXDADV_HDRBUFLEN_SHIFT;
275 if (hlen > adapter->rx_ps_hdr_size)
276 hlen = adapter->rx_ps_hdr_size;
277
278 length = le16_to_cpu(rx_desc->wb.upper.length);
279 cleaned = true;
280 cleaned_count++;
281
282 skb = buffer_info->skb;
283 prefetch(skb->data - NET_IP_ALIGN);
284 buffer_info->skb = NULL;
285 if (!adapter->rx_ps_hdr_size) {
286 dma_unmap_single(&pdev->dev, buffer_info->dma,
287 adapter->rx_buffer_len,
288 DMA_FROM_DEVICE);
289 buffer_info->dma = 0;
290 skb_put(skb, length);
291 goto send_up;
292 }
293
294 if (!skb_shinfo(skb)->nr_frags) {
295 dma_unmap_single(&pdev->dev, buffer_info->dma,
296 adapter->rx_ps_hdr_size,
297 DMA_FROM_DEVICE);
298 buffer_info->dma = 0;
299 skb_put(skb, hlen);
300 }
301
302 if (length) {
303 dma_unmap_page(&pdev->dev, buffer_info->page_dma,
304 PAGE_SIZE / 2,
305 DMA_FROM_DEVICE);
306 buffer_info->page_dma = 0;
307
308 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
309 buffer_info->page,
310 buffer_info->page_offset,
311 length);
312
313 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
314 (page_count(buffer_info->page) != 1))
315 buffer_info->page = NULL;
316 else
317 get_page(buffer_info->page);
318
319 skb->len += length;
320 skb->data_len += length;
321 skb->truesize += PAGE_SIZE / 2;
322 }
323send_up:
324 i++;
325 if (i == rx_ring->count)
326 i = 0;
327 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
328 prefetch(next_rxd);
329 next_buffer = &rx_ring->buffer_info[i];
330
331 if (!(staterr & E1000_RXD_STAT_EOP)) {
332 buffer_info->skb = next_buffer->skb;
333 buffer_info->dma = next_buffer->dma;
334 next_buffer->skb = skb;
335 next_buffer->dma = 0;
336 goto next_desc;
337 }
338
339 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
340 dev_kfree_skb_irq(skb);
341 goto next_desc;
342 }
343
344 total_bytes += skb->len;
345 total_packets++;
346
347 igbvf_rx_checksum_adv(adapter, staterr, skb);
348
349 skb->protocol = eth_type_trans(skb, netdev);
350
351 igbvf_receive_skb(adapter, netdev, skb, staterr,
352 rx_desc->wb.upper.vlan);
353
354next_desc:
355 rx_desc->wb.upper.status_error = 0;
356
357 /* return some buffers to hardware, one at a time is too slow */
358 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
359 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
360 cleaned_count = 0;
361 }
362
363 /* use prefetched values */
364 rx_desc = next_rxd;
365 buffer_info = next_buffer;
366
367 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
368 }
369
370 rx_ring->next_to_clean = i;
371 cleaned_count = igbvf_desc_unused(rx_ring);
372
373 if (cleaned_count)
374 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
375
376 adapter->total_rx_packets += total_packets;
377 adapter->total_rx_bytes += total_bytes;
378 netdev->stats.rx_bytes += total_bytes;
379 netdev->stats.rx_packets += total_packets;
380 return cleaned;
381}
382
383static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
384 struct igbvf_buffer *buffer_info)
385{
386 if (buffer_info->dma) {
387 if (buffer_info->mapped_as_page)
388 dma_unmap_page(&adapter->pdev->dev,
389 buffer_info->dma,
390 buffer_info->length,
391 DMA_TO_DEVICE);
392 else
393 dma_unmap_single(&adapter->pdev->dev,
394 buffer_info->dma,
395 buffer_info->length,
396 DMA_TO_DEVICE);
397 buffer_info->dma = 0;
398 }
399 if (buffer_info->skb) {
400 dev_kfree_skb_any(buffer_info->skb);
401 buffer_info->skb = NULL;
402 }
403 buffer_info->time_stamp = 0;
404}
405
406/**
407 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
408 * @adapter: board private structure
409 *
410 * Return 0 on success, negative on failure
411 **/
412int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
413 struct igbvf_ring *tx_ring)
414{
415 struct pci_dev *pdev = adapter->pdev;
416 int size;
417
418 size = sizeof(struct igbvf_buffer) * tx_ring->count;
419 tx_ring->buffer_info = vzalloc(size);
420 if (!tx_ring->buffer_info)
421 goto err;
422
423 /* round up to nearest 4K */
424 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
425 tx_ring->size = ALIGN(tx_ring->size, 4096);
426
427 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
428 &tx_ring->dma, GFP_KERNEL);
429 if (!tx_ring->desc)
430 goto err;
431
432 tx_ring->adapter = adapter;
433 tx_ring->next_to_use = 0;
434 tx_ring->next_to_clean = 0;
435
436 return 0;
437err:
438 vfree(tx_ring->buffer_info);
439 dev_err(&adapter->pdev->dev,
440 "Unable to allocate memory for the transmit descriptor ring\n");
441 return -ENOMEM;
442}
443
444/**
445 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
446 * @adapter: board private structure
447 *
448 * Returns 0 on success, negative on failure
449 **/
450int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
451 struct igbvf_ring *rx_ring)
452{
453 struct pci_dev *pdev = adapter->pdev;
454 int size, desc_len;
455
456 size = sizeof(struct igbvf_buffer) * rx_ring->count;
457 rx_ring->buffer_info = vzalloc(size);
458 if (!rx_ring->buffer_info)
459 goto err;
460
461 desc_len = sizeof(union e1000_adv_rx_desc);
462
463 /* Round up to nearest 4K */
464 rx_ring->size = rx_ring->count * desc_len;
465 rx_ring->size = ALIGN(rx_ring->size, 4096);
466
467 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
468 &rx_ring->dma, GFP_KERNEL);
469 if (!rx_ring->desc)
470 goto err;
471
472 rx_ring->next_to_clean = 0;
473 rx_ring->next_to_use = 0;
474
475 rx_ring->adapter = adapter;
476
477 return 0;
478
479err:
480 vfree(rx_ring->buffer_info);
481 rx_ring->buffer_info = NULL;
482 dev_err(&adapter->pdev->dev,
483 "Unable to allocate memory for the receive descriptor ring\n");
484 return -ENOMEM;
485}
486
487/**
488 * igbvf_clean_tx_ring - Free Tx Buffers
489 * @tx_ring: ring to be cleaned
490 **/
491static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
492{
493 struct igbvf_adapter *adapter = tx_ring->adapter;
494 struct igbvf_buffer *buffer_info;
495 unsigned long size;
496 unsigned int i;
497
498 if (!tx_ring->buffer_info)
499 return;
500
501 /* Free all the Tx ring sk_buffs */
502 for (i = 0; i < tx_ring->count; i++) {
503 buffer_info = &tx_ring->buffer_info[i];
504 igbvf_put_txbuf(adapter, buffer_info);
505 }
506
507 size = sizeof(struct igbvf_buffer) * tx_ring->count;
508 memset(tx_ring->buffer_info, 0, size);
509
510 /* Zero out the descriptor ring */
511 memset(tx_ring->desc, 0, tx_ring->size);
512
513 tx_ring->next_to_use = 0;
514 tx_ring->next_to_clean = 0;
515
516 writel(0, adapter->hw.hw_addr + tx_ring->head);
517 writel(0, adapter->hw.hw_addr + tx_ring->tail);
518}
519
520/**
521 * igbvf_free_tx_resources - Free Tx Resources per Queue
522 * @tx_ring: ring to free resources from
523 *
524 * Free all transmit software resources
525 **/
526void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
527{
528 struct pci_dev *pdev = tx_ring->adapter->pdev;
529
530 igbvf_clean_tx_ring(tx_ring);
531
532 vfree(tx_ring->buffer_info);
533 tx_ring->buffer_info = NULL;
534
535 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
536 tx_ring->dma);
537
538 tx_ring->desc = NULL;
539}
540
541/**
542 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
543 * @adapter: board private structure
544 **/
545static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
546{
547 struct igbvf_adapter *adapter = rx_ring->adapter;
548 struct igbvf_buffer *buffer_info;
549 struct pci_dev *pdev = adapter->pdev;
550 unsigned long size;
551 unsigned int i;
552
553 if (!rx_ring->buffer_info)
554 return;
555
556 /* Free all the Rx ring sk_buffs */
557 for (i = 0; i < rx_ring->count; i++) {
558 buffer_info = &rx_ring->buffer_info[i];
559 if (buffer_info->dma) {
560 if (adapter->rx_ps_hdr_size) {
561 dma_unmap_single(&pdev->dev, buffer_info->dma,
562 adapter->rx_ps_hdr_size,
563 DMA_FROM_DEVICE);
564 } else {
565 dma_unmap_single(&pdev->dev, buffer_info->dma,
566 adapter->rx_buffer_len,
567 DMA_FROM_DEVICE);
568 }
569 buffer_info->dma = 0;
570 }
571
572 if (buffer_info->skb) {
573 dev_kfree_skb(buffer_info->skb);
574 buffer_info->skb = NULL;
575 }
576
577 if (buffer_info->page) {
578 if (buffer_info->page_dma)
579 dma_unmap_page(&pdev->dev,
580 buffer_info->page_dma,
581 PAGE_SIZE / 2,
582 DMA_FROM_DEVICE);
583 put_page(buffer_info->page);
584 buffer_info->page = NULL;
585 buffer_info->page_dma = 0;
586 buffer_info->page_offset = 0;
587 }
588 }
589
590 size = sizeof(struct igbvf_buffer) * rx_ring->count;
591 memset(rx_ring->buffer_info, 0, size);
592
593 /* Zero out the descriptor ring */
594 memset(rx_ring->desc, 0, rx_ring->size);
595
596 rx_ring->next_to_clean = 0;
597 rx_ring->next_to_use = 0;
598
599 writel(0, adapter->hw.hw_addr + rx_ring->head);
600 writel(0, adapter->hw.hw_addr + rx_ring->tail);
601}
602
603/**
604 * igbvf_free_rx_resources - Free Rx Resources
605 * @rx_ring: ring to clean the resources from
606 *
607 * Free all receive software resources
608 **/
609
610void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
611{
612 struct pci_dev *pdev = rx_ring->adapter->pdev;
613
614 igbvf_clean_rx_ring(rx_ring);
615
616 vfree(rx_ring->buffer_info);
617 rx_ring->buffer_info = NULL;
618
619 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
620 rx_ring->dma);
621 rx_ring->desc = NULL;
622}
623
624/**
625 * igbvf_update_itr - update the dynamic ITR value based on statistics
626 * @adapter: pointer to adapter
627 * @itr_setting: current adapter->itr
628 * @packets: the number of packets during this measurement interval
629 * @bytes: the number of bytes during this measurement interval
630 *
631 * Stores a new ITR value based on packets and byte counts during the last
632 * interrupt. The advantage of per interrupt computation is faster updates
633 * and more accurate ITR for the current traffic pattern. Constants in this
634 * function were computed based on theoretical maximum wire speed and thresholds
635 * were set based on testing data as well as attempting to minimize response
636 * time while increasing bulk throughput.
637 **/
638static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter,
639 enum latency_range itr_setting,
640 int packets, int bytes)
641{
642 enum latency_range retval = itr_setting;
643
644 if (packets == 0)
645 goto update_itr_done;
646
647 switch (itr_setting) {
648 case lowest_latency:
649 /* handle TSO and jumbo frames */
650 if (bytes/packets > 8000)
651 retval = bulk_latency;
652 else if ((packets < 5) && (bytes > 512))
653 retval = low_latency;
654 break;
655 case low_latency: /* 50 usec aka 20000 ints/s */
656 if (bytes > 10000) {
657 /* this if handles the TSO accounting */
658 if (bytes/packets > 8000)
659 retval = bulk_latency;
660 else if ((packets < 10) || ((bytes/packets) > 1200))
661 retval = bulk_latency;
662 else if ((packets > 35))
663 retval = lowest_latency;
664 } else if (bytes/packets > 2000) {
665 retval = bulk_latency;
666 } else if (packets <= 2 && bytes < 512) {
667 retval = lowest_latency;
668 }
669 break;
670 case bulk_latency: /* 250 usec aka 4000 ints/s */
671 if (bytes > 25000) {
672 if (packets > 35)
673 retval = low_latency;
674 } else if (bytes < 6000) {
675 retval = low_latency;
676 }
677 break;
678 default:
679 break;
680 }
681
682update_itr_done:
683 return retval;
684}
685
686static int igbvf_range_to_itr(enum latency_range current_range)
687{
688 int new_itr;
689
690 switch (current_range) {
691 /* counts and packets in update_itr are dependent on these numbers */
692 case lowest_latency:
693 new_itr = IGBVF_70K_ITR;
694 break;
695 case low_latency:
696 new_itr = IGBVF_20K_ITR;
697 break;
698 case bulk_latency:
699 new_itr = IGBVF_4K_ITR;
700 break;
701 default:
702 new_itr = IGBVF_START_ITR;
703 break;
704 }
705 return new_itr;
706}
707
708static void igbvf_set_itr(struct igbvf_adapter *adapter)
709{
710 u32 new_itr;
711
712 adapter->tx_ring->itr_range =
713 igbvf_update_itr(adapter,
714 adapter->tx_ring->itr_val,
715 adapter->total_tx_packets,
716 adapter->total_tx_bytes);
717
718 /* conservative mode (itr 3) eliminates the lowest_latency setting */
719 if (adapter->requested_itr == 3 &&
720 adapter->tx_ring->itr_range == lowest_latency)
721 adapter->tx_ring->itr_range = low_latency;
722
723 new_itr = igbvf_range_to_itr(adapter->tx_ring->itr_range);
724
725 if (new_itr != adapter->tx_ring->itr_val) {
726 u32 current_itr = adapter->tx_ring->itr_val;
727 /* this attempts to bias the interrupt rate towards Bulk
728 * by adding intermediate steps when interrupt rate is
729 * increasing
730 */
731 new_itr = new_itr > current_itr ?
732 min(current_itr + (new_itr >> 2), new_itr) :
733 new_itr;
734 adapter->tx_ring->itr_val = new_itr;
735
736 adapter->tx_ring->set_itr = 1;
737 }
738
739 adapter->rx_ring->itr_range =
740 igbvf_update_itr(adapter, adapter->rx_ring->itr_val,
741 adapter->total_rx_packets,
742 adapter->total_rx_bytes);
743 if (adapter->requested_itr == 3 &&
744 adapter->rx_ring->itr_range == lowest_latency)
745 adapter->rx_ring->itr_range = low_latency;
746
747 new_itr = igbvf_range_to_itr(adapter->rx_ring->itr_range);
748
749 if (new_itr != adapter->rx_ring->itr_val) {
750 u32 current_itr = adapter->rx_ring->itr_val;
751
752 new_itr = new_itr > current_itr ?
753 min(current_itr + (new_itr >> 2), new_itr) :
754 new_itr;
755 adapter->rx_ring->itr_val = new_itr;
756
757 adapter->rx_ring->set_itr = 1;
758 }
759}
760
761/**
762 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
763 * @adapter: board private structure
764 *
765 * returns true if ring is completely cleaned
766 **/
767static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
768{
769 struct igbvf_adapter *adapter = tx_ring->adapter;
770 struct net_device *netdev = adapter->netdev;
771 struct igbvf_buffer *buffer_info;
772 struct sk_buff *skb;
773 union e1000_adv_tx_desc *tx_desc, *eop_desc;
774 unsigned int total_bytes = 0, total_packets = 0;
775 unsigned int i, count = 0;
776 bool cleaned = false;
777
778 i = tx_ring->next_to_clean;
779 buffer_info = &tx_ring->buffer_info[i];
780 eop_desc = buffer_info->next_to_watch;
781
782 do {
783 /* if next_to_watch is not set then there is no work pending */
784 if (!eop_desc)
785 break;
786
787 /* prevent any other reads prior to eop_desc */
788 smp_rmb();
789
790 /* if DD is not set pending work has not been completed */
791 if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)))
792 break;
793
794 /* clear next_to_watch to prevent false hangs */
795 buffer_info->next_to_watch = NULL;
796
797 for (cleaned = false; !cleaned; count++) {
798 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
799 cleaned = (tx_desc == eop_desc);
800 skb = buffer_info->skb;
801
802 if (skb) {
803 unsigned int segs, bytecount;
804
805 /* gso_segs is currently only valid for tcp */
806 segs = skb_shinfo(skb)->gso_segs ?: 1;
807 /* multiply data chunks by size of headers */
808 bytecount = ((segs - 1) * skb_headlen(skb)) +
809 skb->len;
810 total_packets += segs;
811 total_bytes += bytecount;
812 }
813
814 igbvf_put_txbuf(adapter, buffer_info);
815 tx_desc->wb.status = 0;
816
817 i++;
818 if (i == tx_ring->count)
819 i = 0;
820
821 buffer_info = &tx_ring->buffer_info[i];
822 }
823
824 eop_desc = buffer_info->next_to_watch;
825 } while (count < tx_ring->count);
826
827 tx_ring->next_to_clean = i;
828
829 if (unlikely(count && netif_carrier_ok(netdev) &&
830 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
831 /* Make sure that anybody stopping the queue after this
832 * sees the new next_to_clean.
833 */
834 smp_mb();
835 if (netif_queue_stopped(netdev) &&
836 !(test_bit(__IGBVF_DOWN, &adapter->state))) {
837 netif_wake_queue(netdev);
838 ++adapter->restart_queue;
839 }
840 }
841
842 netdev->stats.tx_bytes += total_bytes;
843 netdev->stats.tx_packets += total_packets;
844 return count < tx_ring->count;
845}
846
847static irqreturn_t igbvf_msix_other(int irq, void *data)
848{
849 struct net_device *netdev = data;
850 struct igbvf_adapter *adapter = netdev_priv(netdev);
851 struct e1000_hw *hw = &adapter->hw;
852
853 adapter->int_counter1++;
854
855 hw->mac.get_link_status = 1;
856 if (!test_bit(__IGBVF_DOWN, &adapter->state))
857 mod_timer(&adapter->watchdog_timer, jiffies + 1);
858
859 ew32(EIMS, adapter->eims_other);
860
861 return IRQ_HANDLED;
862}
863
864static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
865{
866 struct net_device *netdev = data;
867 struct igbvf_adapter *adapter = netdev_priv(netdev);
868 struct e1000_hw *hw = &adapter->hw;
869 struct igbvf_ring *tx_ring = adapter->tx_ring;
870
871 if (tx_ring->set_itr) {
872 writel(tx_ring->itr_val,
873 adapter->hw.hw_addr + tx_ring->itr_register);
874 adapter->tx_ring->set_itr = 0;
875 }
876
877 adapter->total_tx_bytes = 0;
878 adapter->total_tx_packets = 0;
879
880 /* auto mask will automatically re-enable the interrupt when we write
881 * EICS
882 */
883 if (!igbvf_clean_tx_irq(tx_ring))
884 /* Ring was not completely cleaned, so fire another interrupt */
885 ew32(EICS, tx_ring->eims_value);
886 else
887 ew32(EIMS, tx_ring->eims_value);
888
889 return IRQ_HANDLED;
890}
891
892static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
893{
894 struct net_device *netdev = data;
895 struct igbvf_adapter *adapter = netdev_priv(netdev);
896
897 adapter->int_counter0++;
898
899 /* Write the ITR value calculated at the end of the
900 * previous interrupt.
901 */
902 if (adapter->rx_ring->set_itr) {
903 writel(adapter->rx_ring->itr_val,
904 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
905 adapter->rx_ring->set_itr = 0;
906 }
907
908 if (napi_schedule_prep(&adapter->rx_ring->napi)) {
909 adapter->total_rx_bytes = 0;
910 adapter->total_rx_packets = 0;
911 __napi_schedule(&adapter->rx_ring->napi);
912 }
913
914 return IRQ_HANDLED;
915}
916
917#define IGBVF_NO_QUEUE -1
918
919static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
920 int tx_queue, int msix_vector)
921{
922 struct e1000_hw *hw = &adapter->hw;
923 u32 ivar, index;
924
925 /* 82576 uses a table-based method for assigning vectors.
926 * Each queue has a single entry in the table to which we write
927 * a vector number along with a "valid" bit. Sadly, the layout
928 * of the table is somewhat counterintuitive.
929 */
930 if (rx_queue > IGBVF_NO_QUEUE) {
931 index = (rx_queue >> 1);
932 ivar = array_er32(IVAR0, index);
933 if (rx_queue & 0x1) {
934 /* vector goes into third byte of register */
935 ivar = ivar & 0xFF00FFFF;
936 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
937 } else {
938 /* vector goes into low byte of register */
939 ivar = ivar & 0xFFFFFF00;
940 ivar |= msix_vector | E1000_IVAR_VALID;
941 }
942 adapter->rx_ring[rx_queue].eims_value = BIT(msix_vector);
943 array_ew32(IVAR0, index, ivar);
944 }
945 if (tx_queue > IGBVF_NO_QUEUE) {
946 index = (tx_queue >> 1);
947 ivar = array_er32(IVAR0, index);
948 if (tx_queue & 0x1) {
949 /* vector goes into high byte of register */
950 ivar = ivar & 0x00FFFFFF;
951 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
952 } else {
953 /* vector goes into second byte of register */
954 ivar = ivar & 0xFFFF00FF;
955 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
956 }
957 adapter->tx_ring[tx_queue].eims_value = BIT(msix_vector);
958 array_ew32(IVAR0, index, ivar);
959 }
960}
961
962/**
963 * igbvf_configure_msix - Configure MSI-X hardware
964 * @adapter: board private structure
965 *
966 * igbvf_configure_msix sets up the hardware to properly
967 * generate MSI-X interrupts.
968 **/
969static void igbvf_configure_msix(struct igbvf_adapter *adapter)
970{
971 u32 tmp;
972 struct e1000_hw *hw = &adapter->hw;
973 struct igbvf_ring *tx_ring = adapter->tx_ring;
974 struct igbvf_ring *rx_ring = adapter->rx_ring;
975 int vector = 0;
976
977 adapter->eims_enable_mask = 0;
978
979 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
980 adapter->eims_enable_mask |= tx_ring->eims_value;
981 writel(tx_ring->itr_val, hw->hw_addr + tx_ring->itr_register);
982 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
983 adapter->eims_enable_mask |= rx_ring->eims_value;
984 writel(rx_ring->itr_val, hw->hw_addr + rx_ring->itr_register);
985
986 /* set vector for other causes, i.e. link changes */
987
988 tmp = (vector++ | E1000_IVAR_VALID);
989
990 ew32(IVAR_MISC, tmp);
991
992 adapter->eims_enable_mask = GENMASK(vector - 1, 0);
993 adapter->eims_other = BIT(vector - 1);
994 e1e_flush();
995}
996
997static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
998{
999 if (adapter->msix_entries) {
1000 pci_disable_msix(adapter->pdev);
1001 kfree(adapter->msix_entries);
1002 adapter->msix_entries = NULL;
1003 }
1004}
1005
1006/**
1007 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1008 * @adapter: board private structure
1009 *
1010 * Attempt to configure interrupts using the best available
1011 * capabilities of the hardware and kernel.
1012 **/
1013static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
1014{
1015 int err = -ENOMEM;
1016 int i;
1017
1018 /* we allocate 3 vectors, 1 for Tx, 1 for Rx, one for PF messages */
1019 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
1020 GFP_KERNEL);
1021 if (adapter->msix_entries) {
1022 for (i = 0; i < 3; i++)
1023 adapter->msix_entries[i].entry = i;
1024
1025 err = pci_enable_msix_range(adapter->pdev,
1026 adapter->msix_entries, 3, 3);
1027 }
1028
1029 if (err < 0) {
1030 /* MSI-X failed */
1031 dev_err(&adapter->pdev->dev,
1032 "Failed to initialize MSI-X interrupts.\n");
1033 igbvf_reset_interrupt_capability(adapter);
1034 }
1035}
1036
1037/**
1038 * igbvf_request_msix - Initialize MSI-X interrupts
1039 * @adapter: board private structure
1040 *
1041 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1042 * kernel.
1043 **/
1044static int igbvf_request_msix(struct igbvf_adapter *adapter)
1045{
1046 struct net_device *netdev = adapter->netdev;
1047 int err = 0, vector = 0;
1048
1049 if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1050 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1051 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1052 } else {
1053 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1054 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1055 }
1056
1057 err = request_irq(adapter->msix_entries[vector].vector,
1058 igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1059 netdev);
1060 if (err)
1061 goto out;
1062
1063 adapter->tx_ring->itr_register = E1000_EITR(vector);
1064 adapter->tx_ring->itr_val = adapter->current_itr;
1065 vector++;
1066
1067 err = request_irq(adapter->msix_entries[vector].vector,
1068 igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1069 netdev);
1070 if (err)
1071 goto out;
1072
1073 adapter->rx_ring->itr_register = E1000_EITR(vector);
1074 adapter->rx_ring->itr_val = adapter->current_itr;
1075 vector++;
1076
1077 err = request_irq(adapter->msix_entries[vector].vector,
1078 igbvf_msix_other, 0, netdev->name, netdev);
1079 if (err)
1080 goto out;
1081
1082 igbvf_configure_msix(adapter);
1083 return 0;
1084out:
1085 return err;
1086}
1087
1088/**
1089 * igbvf_alloc_queues - Allocate memory for all rings
1090 * @adapter: board private structure to initialize
1091 **/
1092static int igbvf_alloc_queues(struct igbvf_adapter *adapter)
1093{
1094 struct net_device *netdev = adapter->netdev;
1095
1096 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1097 if (!adapter->tx_ring)
1098 return -ENOMEM;
1099
1100 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1101 if (!adapter->rx_ring) {
1102 kfree(adapter->tx_ring);
1103 return -ENOMEM;
1104 }
1105
1106 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1107
1108 return 0;
1109}
1110
1111/**
1112 * igbvf_request_irq - initialize interrupts
1113 * @adapter: board private structure
1114 *
1115 * Attempts to configure interrupts using the best available
1116 * capabilities of the hardware and kernel.
1117 **/
1118static int igbvf_request_irq(struct igbvf_adapter *adapter)
1119{
1120 int err = -1;
1121
1122 /* igbvf supports msi-x only */
1123 if (adapter->msix_entries)
1124 err = igbvf_request_msix(adapter);
1125
1126 if (!err)
1127 return err;
1128
1129 dev_err(&adapter->pdev->dev,
1130 "Unable to allocate interrupt, Error: %d\n", err);
1131
1132 return err;
1133}
1134
1135static void igbvf_free_irq(struct igbvf_adapter *adapter)
1136{
1137 struct net_device *netdev = adapter->netdev;
1138 int vector;
1139
1140 if (adapter->msix_entries) {
1141 for (vector = 0; vector < 3; vector++)
1142 free_irq(adapter->msix_entries[vector].vector, netdev);
1143 }
1144}
1145
1146/**
1147 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1148 * @adapter: board private structure
1149 **/
1150static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1151{
1152 struct e1000_hw *hw = &adapter->hw;
1153
1154 ew32(EIMC, ~0);
1155
1156 if (adapter->msix_entries)
1157 ew32(EIAC, 0);
1158}
1159
1160/**
1161 * igbvf_irq_enable - Enable default interrupt generation settings
1162 * @adapter: board private structure
1163 **/
1164static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1165{
1166 struct e1000_hw *hw = &adapter->hw;
1167
1168 ew32(EIAC, adapter->eims_enable_mask);
1169 ew32(EIAM, adapter->eims_enable_mask);
1170 ew32(EIMS, adapter->eims_enable_mask);
1171}
1172
1173/**
1174 * igbvf_poll - NAPI Rx polling callback
1175 * @napi: struct associated with this polling callback
1176 * @budget: amount of packets driver is allowed to process this poll
1177 **/
1178static int igbvf_poll(struct napi_struct *napi, int budget)
1179{
1180 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1181 struct igbvf_adapter *adapter = rx_ring->adapter;
1182 struct e1000_hw *hw = &adapter->hw;
1183 int work_done = 0;
1184
1185 igbvf_clean_rx_irq(adapter, &work_done, budget);
1186
1187 if (work_done == budget)
1188 return budget;
1189
1190 /* Exit the polling mode, but don't re-enable interrupts if stack might
1191 * poll us due to busy-polling
1192 */
1193 if (likely(napi_complete_done(napi, work_done))) {
1194 if (adapter->requested_itr & 3)
1195 igbvf_set_itr(adapter);
1196
1197 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1198 ew32(EIMS, adapter->rx_ring->eims_value);
1199 }
1200
1201 return work_done;
1202}
1203
1204/**
1205 * igbvf_set_rlpml - set receive large packet maximum length
1206 * @adapter: board private structure
1207 *
1208 * Configure the maximum size of packets that will be received
1209 */
1210static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1211{
1212 int max_frame_size;
1213 struct e1000_hw *hw = &adapter->hw;
1214
1215 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
1216
1217 spin_lock_bh(&hw->mbx_lock);
1218
1219 e1000_rlpml_set_vf(hw, max_frame_size);
1220
1221 spin_unlock_bh(&hw->mbx_lock);
1222}
1223
1224static int igbvf_vlan_rx_add_vid(struct net_device *netdev,
1225 __be16 proto, u16 vid)
1226{
1227 struct igbvf_adapter *adapter = netdev_priv(netdev);
1228 struct e1000_hw *hw = &adapter->hw;
1229
1230 spin_lock_bh(&hw->mbx_lock);
1231
1232 if (hw->mac.ops.set_vfta(hw, vid, true)) {
1233 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
1234 spin_unlock_bh(&hw->mbx_lock);
1235 return -EINVAL;
1236 }
1237
1238 spin_unlock_bh(&hw->mbx_lock);
1239
1240 set_bit(vid, adapter->active_vlans);
1241 return 0;
1242}
1243
1244static int igbvf_vlan_rx_kill_vid(struct net_device *netdev,
1245 __be16 proto, u16 vid)
1246{
1247 struct igbvf_adapter *adapter = netdev_priv(netdev);
1248 struct e1000_hw *hw = &adapter->hw;
1249
1250 spin_lock_bh(&hw->mbx_lock);
1251
1252 if (hw->mac.ops.set_vfta(hw, vid, false)) {
1253 dev_err(&adapter->pdev->dev,
1254 "Failed to remove vlan id %d\n", vid);
1255 spin_unlock_bh(&hw->mbx_lock);
1256 return -EINVAL;
1257 }
1258
1259 spin_unlock_bh(&hw->mbx_lock);
1260
1261 clear_bit(vid, adapter->active_vlans);
1262 return 0;
1263}
1264
1265static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1266{
1267 u16 vid;
1268
1269 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1270 igbvf_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
1271}
1272
1273/**
1274 * igbvf_configure_tx - Configure Transmit Unit after Reset
1275 * @adapter: board private structure
1276 *
1277 * Configure the Tx unit of the MAC after a reset.
1278 **/
1279static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1280{
1281 struct e1000_hw *hw = &adapter->hw;
1282 struct igbvf_ring *tx_ring = adapter->tx_ring;
1283 u64 tdba;
1284 u32 txdctl, dca_txctrl;
1285
1286 /* disable transmits */
1287 txdctl = er32(TXDCTL(0));
1288 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1289 e1e_flush();
1290 msleep(10);
1291
1292 /* Setup the HW Tx Head and Tail descriptor pointers */
1293 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1294 tdba = tx_ring->dma;
1295 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1296 ew32(TDBAH(0), (tdba >> 32));
1297 ew32(TDH(0), 0);
1298 ew32(TDT(0), 0);
1299 tx_ring->head = E1000_TDH(0);
1300 tx_ring->tail = E1000_TDT(0);
1301
1302 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1303 * MUST be delivered in order or it will completely screw up
1304 * our bookkeeping.
1305 */
1306 dca_txctrl = er32(DCA_TXCTRL(0));
1307 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1308 ew32(DCA_TXCTRL(0), dca_txctrl);
1309
1310 /* enable transmits */
1311 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1312 ew32(TXDCTL(0), txdctl);
1313
1314 /* Setup Transmit Descriptor Settings for eop descriptor */
1315 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1316
1317 /* enable Report Status bit */
1318 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1319}
1320
1321/**
1322 * igbvf_setup_srrctl - configure the receive control registers
1323 * @adapter: Board private structure
1324 **/
1325static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1326{
1327 struct e1000_hw *hw = &adapter->hw;
1328 u32 srrctl = 0;
1329
1330 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1331 E1000_SRRCTL_BSIZEHDR_MASK |
1332 E1000_SRRCTL_BSIZEPKT_MASK);
1333
1334 /* Enable queue drop to avoid head of line blocking */
1335 srrctl |= E1000_SRRCTL_DROP_EN;
1336
1337 /* Setup buffer sizes */
1338 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1339 E1000_SRRCTL_BSIZEPKT_SHIFT;
1340
1341 if (adapter->rx_buffer_len < 2048) {
1342 adapter->rx_ps_hdr_size = 0;
1343 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1344 } else {
1345 adapter->rx_ps_hdr_size = 128;
1346 srrctl |= adapter->rx_ps_hdr_size <<
1347 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1348 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1349 }
1350
1351 ew32(SRRCTL(0), srrctl);
1352}
1353
1354/**
1355 * igbvf_configure_rx - Configure Receive Unit after Reset
1356 * @adapter: board private structure
1357 *
1358 * Configure the Rx unit of the MAC after a reset.
1359 **/
1360static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1361{
1362 struct e1000_hw *hw = &adapter->hw;
1363 struct igbvf_ring *rx_ring = adapter->rx_ring;
1364 u64 rdba;
1365 u32 rxdctl;
1366
1367 /* disable receives */
1368 rxdctl = er32(RXDCTL(0));
1369 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1370 e1e_flush();
1371 msleep(10);
1372
1373 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1374 * the Base and Length of the Rx Descriptor Ring
1375 */
1376 rdba = rx_ring->dma;
1377 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1378 ew32(RDBAH(0), (rdba >> 32));
1379 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1380 rx_ring->head = E1000_RDH(0);
1381 rx_ring->tail = E1000_RDT(0);
1382 ew32(RDH(0), 0);
1383 ew32(RDT(0), 0);
1384
1385 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1386 rxdctl &= 0xFFF00000;
1387 rxdctl |= IGBVF_RX_PTHRESH;
1388 rxdctl |= IGBVF_RX_HTHRESH << 8;
1389 rxdctl |= IGBVF_RX_WTHRESH << 16;
1390
1391 igbvf_set_rlpml(adapter);
1392
1393 /* enable receives */
1394 ew32(RXDCTL(0), rxdctl);
1395}
1396
1397/**
1398 * igbvf_set_multi - Multicast and Promiscuous mode set
1399 * @netdev: network interface device structure
1400 *
1401 * The set_multi entry point is called whenever the multicast address
1402 * list or the network interface flags are updated. This routine is
1403 * responsible for configuring the hardware for proper multicast,
1404 * promiscuous mode, and all-multi behavior.
1405 **/
1406static void igbvf_set_multi(struct net_device *netdev)
1407{
1408 struct igbvf_adapter *adapter = netdev_priv(netdev);
1409 struct e1000_hw *hw = &adapter->hw;
1410 struct netdev_hw_addr *ha;
1411 u8 *mta_list = NULL;
1412 int i;
1413
1414 if (!netdev_mc_empty(netdev)) {
1415 mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN,
1416 GFP_ATOMIC);
1417 if (!mta_list)
1418 return;
1419 }
1420
1421 /* prepare a packed array of only addresses. */
1422 i = 0;
1423 netdev_for_each_mc_addr(ha, netdev)
1424 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
1425
1426 spin_lock_bh(&hw->mbx_lock);
1427
1428 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1429
1430 spin_unlock_bh(&hw->mbx_lock);
1431 kfree(mta_list);
1432}
1433
1434/**
1435 * igbvf_set_uni - Configure unicast MAC filters
1436 * @netdev: network interface device structure
1437 *
1438 * This routine is responsible for configuring the hardware for proper
1439 * unicast filters.
1440 **/
1441static int igbvf_set_uni(struct net_device *netdev)
1442{
1443 struct igbvf_adapter *adapter = netdev_priv(netdev);
1444 struct e1000_hw *hw = &adapter->hw;
1445
1446 if (netdev_uc_count(netdev) > IGBVF_MAX_MAC_FILTERS) {
1447 pr_err("Too many unicast filters - No Space\n");
1448 return -ENOSPC;
1449 }
1450
1451 spin_lock_bh(&hw->mbx_lock);
1452
1453 /* Clear all unicast MAC filters */
1454 hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_CLR, NULL);
1455
1456 spin_unlock_bh(&hw->mbx_lock);
1457
1458 if (!netdev_uc_empty(netdev)) {
1459 struct netdev_hw_addr *ha;
1460
1461 /* Add MAC filters one by one */
1462 netdev_for_each_uc_addr(ha, netdev) {
1463 spin_lock_bh(&hw->mbx_lock);
1464
1465 hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_ADD,
1466 ha->addr);
1467
1468 spin_unlock_bh(&hw->mbx_lock);
1469 udelay(200);
1470 }
1471 }
1472
1473 return 0;
1474}
1475
1476static void igbvf_set_rx_mode(struct net_device *netdev)
1477{
1478 igbvf_set_multi(netdev);
1479 igbvf_set_uni(netdev);
1480}
1481
1482/**
1483 * igbvf_configure - configure the hardware for Rx and Tx
1484 * @adapter: private board structure
1485 **/
1486static void igbvf_configure(struct igbvf_adapter *adapter)
1487{
1488 igbvf_set_rx_mode(adapter->netdev);
1489
1490 igbvf_restore_vlan(adapter);
1491
1492 igbvf_configure_tx(adapter);
1493 igbvf_setup_srrctl(adapter);
1494 igbvf_configure_rx(adapter);
1495 igbvf_alloc_rx_buffers(adapter->rx_ring,
1496 igbvf_desc_unused(adapter->rx_ring));
1497}
1498
1499/* igbvf_reset - bring the hardware into a known good state
1500 * @adapter: private board structure
1501 *
1502 * This function boots the hardware and enables some settings that
1503 * require a configuration cycle of the hardware - those cannot be
1504 * set/changed during runtime. After reset the device needs to be
1505 * properly configured for Rx, Tx etc.
1506 */
1507static void igbvf_reset(struct igbvf_adapter *adapter)
1508{
1509 struct e1000_mac_info *mac = &adapter->hw.mac;
1510 struct net_device *netdev = adapter->netdev;
1511 struct e1000_hw *hw = &adapter->hw;
1512
1513 spin_lock_bh(&hw->mbx_lock);
1514
1515 /* Allow time for pending master requests to run */
1516 if (mac->ops.reset_hw(hw))
1517 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1518
1519 mac->ops.init_hw(hw);
1520
1521 spin_unlock_bh(&hw->mbx_lock);
1522
1523 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1524 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1525 netdev->addr_len);
1526 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1527 netdev->addr_len);
1528 }
1529
1530 adapter->last_reset = jiffies;
1531}
1532
1533int igbvf_up(struct igbvf_adapter *adapter)
1534{
1535 struct e1000_hw *hw = &adapter->hw;
1536
1537 /* hardware has been reset, we need to reload some things */
1538 igbvf_configure(adapter);
1539
1540 clear_bit(__IGBVF_DOWN, &adapter->state);
1541
1542 napi_enable(&adapter->rx_ring->napi);
1543 if (adapter->msix_entries)
1544 igbvf_configure_msix(adapter);
1545
1546 /* Clear any pending interrupts. */
1547 er32(EICR);
1548 igbvf_irq_enable(adapter);
1549
1550 /* start the watchdog */
1551 hw->mac.get_link_status = 1;
1552 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1553
1554 return 0;
1555}
1556
1557void igbvf_down(struct igbvf_adapter *adapter)
1558{
1559 struct net_device *netdev = adapter->netdev;
1560 struct e1000_hw *hw = &adapter->hw;
1561 u32 rxdctl, txdctl;
1562
1563 /* signal that we're down so the interrupt handler does not
1564 * reschedule our watchdog timer
1565 */
1566 set_bit(__IGBVF_DOWN, &adapter->state);
1567
1568 /* disable receives in the hardware */
1569 rxdctl = er32(RXDCTL(0));
1570 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1571
1572 netif_carrier_off(netdev);
1573 netif_stop_queue(netdev);
1574
1575 /* disable transmits in the hardware */
1576 txdctl = er32(TXDCTL(0));
1577 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1578
1579 /* flush both disables and wait for them to finish */
1580 e1e_flush();
1581 msleep(10);
1582
1583 napi_disable(&adapter->rx_ring->napi);
1584
1585 igbvf_irq_disable(adapter);
1586
1587 del_timer_sync(&adapter->watchdog_timer);
1588
1589 /* record the stats before reset*/
1590 igbvf_update_stats(adapter);
1591
1592 adapter->link_speed = 0;
1593 adapter->link_duplex = 0;
1594
1595 igbvf_reset(adapter);
1596 igbvf_clean_tx_ring(adapter->tx_ring);
1597 igbvf_clean_rx_ring(adapter->rx_ring);
1598}
1599
1600void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1601{
1602 might_sleep();
1603 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1604 usleep_range(1000, 2000);
1605 igbvf_down(adapter);
1606 igbvf_up(adapter);
1607 clear_bit(__IGBVF_RESETTING, &adapter->state);
1608}
1609
1610/**
1611 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1612 * @adapter: board private structure to initialize
1613 *
1614 * igbvf_sw_init initializes the Adapter private data structure.
1615 * Fields are initialized based on PCI device information and
1616 * OS network device settings (MTU size).
1617 **/
1618static int igbvf_sw_init(struct igbvf_adapter *adapter)
1619{
1620 struct net_device *netdev = adapter->netdev;
1621 s32 rc;
1622
1623 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1624 adapter->rx_ps_hdr_size = 0;
1625 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1626 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1627
1628 adapter->tx_int_delay = 8;
1629 adapter->tx_abs_int_delay = 32;
1630 adapter->rx_int_delay = 0;
1631 adapter->rx_abs_int_delay = 8;
1632 adapter->requested_itr = 3;
1633 adapter->current_itr = IGBVF_START_ITR;
1634
1635 /* Set various function pointers */
1636 adapter->ei->init_ops(&adapter->hw);
1637
1638 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1639 if (rc)
1640 return rc;
1641
1642 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1643 if (rc)
1644 return rc;
1645
1646 igbvf_set_interrupt_capability(adapter);
1647
1648 if (igbvf_alloc_queues(adapter))
1649 return -ENOMEM;
1650
1651 spin_lock_init(&adapter->tx_queue_lock);
1652
1653 /* Explicitly disable IRQ since the NIC can be in any state. */
1654 igbvf_irq_disable(adapter);
1655
1656 spin_lock_init(&adapter->stats_lock);
1657 spin_lock_init(&adapter->hw.mbx_lock);
1658
1659 set_bit(__IGBVF_DOWN, &adapter->state);
1660 return 0;
1661}
1662
1663static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1664{
1665 struct e1000_hw *hw = &adapter->hw;
1666
1667 adapter->stats.last_gprc = er32(VFGPRC);
1668 adapter->stats.last_gorc = er32(VFGORC);
1669 adapter->stats.last_gptc = er32(VFGPTC);
1670 adapter->stats.last_gotc = er32(VFGOTC);
1671 adapter->stats.last_mprc = er32(VFMPRC);
1672 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1673 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1674 adapter->stats.last_gorlbc = er32(VFGORLBC);
1675 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1676
1677 adapter->stats.base_gprc = er32(VFGPRC);
1678 adapter->stats.base_gorc = er32(VFGORC);
1679 adapter->stats.base_gptc = er32(VFGPTC);
1680 adapter->stats.base_gotc = er32(VFGOTC);
1681 adapter->stats.base_mprc = er32(VFMPRC);
1682 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1683 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1684 adapter->stats.base_gorlbc = er32(VFGORLBC);
1685 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1686}
1687
1688/**
1689 * igbvf_open - Called when a network interface is made active
1690 * @netdev: network interface device structure
1691 *
1692 * Returns 0 on success, negative value on failure
1693 *
1694 * The open entry point is called when a network interface is made
1695 * active by the system (IFF_UP). At this point all resources needed
1696 * for transmit and receive operations are allocated, the interrupt
1697 * handler is registered with the OS, the watchdog timer is started,
1698 * and the stack is notified that the interface is ready.
1699 **/
1700static int igbvf_open(struct net_device *netdev)
1701{
1702 struct igbvf_adapter *adapter = netdev_priv(netdev);
1703 struct e1000_hw *hw = &adapter->hw;
1704 int err;
1705
1706 /* disallow open during test */
1707 if (test_bit(__IGBVF_TESTING, &adapter->state))
1708 return -EBUSY;
1709
1710 /* allocate transmit descriptors */
1711 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1712 if (err)
1713 goto err_setup_tx;
1714
1715 /* allocate receive descriptors */
1716 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1717 if (err)
1718 goto err_setup_rx;
1719
1720 /* before we allocate an interrupt, we must be ready to handle it.
1721 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1722 * as soon as we call pci_request_irq, so we have to setup our
1723 * clean_rx handler before we do so.
1724 */
1725 igbvf_configure(adapter);
1726
1727 err = igbvf_request_irq(adapter);
1728 if (err)
1729 goto err_req_irq;
1730
1731 /* From here on the code is the same as igbvf_up() */
1732 clear_bit(__IGBVF_DOWN, &adapter->state);
1733
1734 napi_enable(&adapter->rx_ring->napi);
1735
1736 /* clear any pending interrupts */
1737 er32(EICR);
1738
1739 igbvf_irq_enable(adapter);
1740
1741 /* start the watchdog */
1742 hw->mac.get_link_status = 1;
1743 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1744
1745 return 0;
1746
1747err_req_irq:
1748 igbvf_free_rx_resources(adapter->rx_ring);
1749err_setup_rx:
1750 igbvf_free_tx_resources(adapter->tx_ring);
1751err_setup_tx:
1752 igbvf_reset(adapter);
1753
1754 return err;
1755}
1756
1757/**
1758 * igbvf_close - Disables a network interface
1759 * @netdev: network interface device structure
1760 *
1761 * Returns 0, this is not allowed to fail
1762 *
1763 * The close entry point is called when an interface is de-activated
1764 * by the OS. The hardware is still under the drivers control, but
1765 * needs to be disabled. A global MAC reset is issued to stop the
1766 * hardware, and all transmit and receive resources are freed.
1767 **/
1768static int igbvf_close(struct net_device *netdev)
1769{
1770 struct igbvf_adapter *adapter = netdev_priv(netdev);
1771
1772 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1773 igbvf_down(adapter);
1774
1775 igbvf_free_irq(adapter);
1776
1777 igbvf_free_tx_resources(adapter->tx_ring);
1778 igbvf_free_rx_resources(adapter->rx_ring);
1779
1780 return 0;
1781}
1782
1783/**
1784 * igbvf_set_mac - Change the Ethernet Address of the NIC
1785 * @netdev: network interface device structure
1786 * @p: pointer to an address structure
1787 *
1788 * Returns 0 on success, negative on failure
1789 **/
1790static int igbvf_set_mac(struct net_device *netdev, void *p)
1791{
1792 struct igbvf_adapter *adapter = netdev_priv(netdev);
1793 struct e1000_hw *hw = &adapter->hw;
1794 struct sockaddr *addr = p;
1795
1796 if (!is_valid_ether_addr(addr->sa_data))
1797 return -EADDRNOTAVAIL;
1798
1799 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1800
1801 spin_lock_bh(&hw->mbx_lock);
1802
1803 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1804
1805 spin_unlock_bh(&hw->mbx_lock);
1806
1807 if (!ether_addr_equal(addr->sa_data, hw->mac.addr))
1808 return -EADDRNOTAVAIL;
1809
1810 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1811
1812 return 0;
1813}
1814
1815#define UPDATE_VF_COUNTER(reg, name) \
1816{ \
1817 u32 current_counter = er32(reg); \
1818 if (current_counter < adapter->stats.last_##name) \
1819 adapter->stats.name += 0x100000000LL; \
1820 adapter->stats.last_##name = current_counter; \
1821 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1822 adapter->stats.name |= current_counter; \
1823}
1824
1825/**
1826 * igbvf_update_stats - Update the board statistics counters
1827 * @adapter: board private structure
1828**/
1829void igbvf_update_stats(struct igbvf_adapter *adapter)
1830{
1831 struct e1000_hw *hw = &adapter->hw;
1832 struct pci_dev *pdev = adapter->pdev;
1833
1834 /* Prevent stats update while adapter is being reset, link is down
1835 * or if the pci connection is down.
1836 */
1837 if (adapter->link_speed == 0)
1838 return;
1839
1840 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1841 return;
1842
1843 if (pci_channel_offline(pdev))
1844 return;
1845
1846 UPDATE_VF_COUNTER(VFGPRC, gprc);
1847 UPDATE_VF_COUNTER(VFGORC, gorc);
1848 UPDATE_VF_COUNTER(VFGPTC, gptc);
1849 UPDATE_VF_COUNTER(VFGOTC, gotc);
1850 UPDATE_VF_COUNTER(VFMPRC, mprc);
1851 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1852 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1853 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1854 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1855
1856 /* Fill out the OS statistics structure */
1857 adapter->netdev->stats.multicast = adapter->stats.mprc;
1858}
1859
1860static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1861{
1862 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n",
1863 adapter->link_speed,
1864 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half");
1865}
1866
1867static bool igbvf_has_link(struct igbvf_adapter *adapter)
1868{
1869 struct e1000_hw *hw = &adapter->hw;
1870 s32 ret_val = E1000_SUCCESS;
1871 bool link_active;
1872
1873 /* If interface is down, stay link down */
1874 if (test_bit(__IGBVF_DOWN, &adapter->state))
1875 return false;
1876
1877 spin_lock_bh(&hw->mbx_lock);
1878
1879 ret_val = hw->mac.ops.check_for_link(hw);
1880
1881 spin_unlock_bh(&hw->mbx_lock);
1882
1883 link_active = !hw->mac.get_link_status;
1884
1885 /* if check for link returns error we will need to reset */
1886 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1887 schedule_work(&adapter->reset_task);
1888
1889 return link_active;
1890}
1891
1892/**
1893 * igbvf_watchdog - Timer Call-back
1894 * @data: pointer to adapter cast into an unsigned long
1895 **/
1896static void igbvf_watchdog(struct timer_list *t)
1897{
1898 struct igbvf_adapter *adapter = from_timer(adapter, t, watchdog_timer);
1899
1900 /* Do the rest outside of interrupt context */
1901 schedule_work(&adapter->watchdog_task);
1902}
1903
1904static void igbvf_watchdog_task(struct work_struct *work)
1905{
1906 struct igbvf_adapter *adapter = container_of(work,
1907 struct igbvf_adapter,
1908 watchdog_task);
1909 struct net_device *netdev = adapter->netdev;
1910 struct e1000_mac_info *mac = &adapter->hw.mac;
1911 struct igbvf_ring *tx_ring = adapter->tx_ring;
1912 struct e1000_hw *hw = &adapter->hw;
1913 u32 link;
1914 int tx_pending = 0;
1915
1916 link = igbvf_has_link(adapter);
1917
1918 if (link) {
1919 if (!netif_carrier_ok(netdev)) {
1920 mac->ops.get_link_up_info(&adapter->hw,
1921 &adapter->link_speed,
1922 &adapter->link_duplex);
1923 igbvf_print_link_info(adapter);
1924
1925 netif_carrier_on(netdev);
1926 netif_wake_queue(netdev);
1927 }
1928 } else {
1929 if (netif_carrier_ok(netdev)) {
1930 adapter->link_speed = 0;
1931 adapter->link_duplex = 0;
1932 dev_info(&adapter->pdev->dev, "Link is Down\n");
1933 netif_carrier_off(netdev);
1934 netif_stop_queue(netdev);
1935 }
1936 }
1937
1938 if (netif_carrier_ok(netdev)) {
1939 igbvf_update_stats(adapter);
1940 } else {
1941 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1942 tx_ring->count);
1943 if (tx_pending) {
1944 /* We've lost link, so the controller stops DMA,
1945 * but we've got queued Tx work that's never going
1946 * to get done, so reset controller to flush Tx.
1947 * (Do the reset outside of interrupt context).
1948 */
1949 adapter->tx_timeout_count++;
1950 schedule_work(&adapter->reset_task);
1951 }
1952 }
1953
1954 /* Cause software interrupt to ensure Rx ring is cleaned */
1955 ew32(EICS, adapter->rx_ring->eims_value);
1956
1957 /* Reset the timer */
1958 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1959 mod_timer(&adapter->watchdog_timer,
1960 round_jiffies(jiffies + (2 * HZ)));
1961}
1962
1963#define IGBVF_TX_FLAGS_CSUM 0x00000001
1964#define IGBVF_TX_FLAGS_VLAN 0x00000002
1965#define IGBVF_TX_FLAGS_TSO 0x00000004
1966#define IGBVF_TX_FLAGS_IPV4 0x00000008
1967#define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1968#define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1969
1970static void igbvf_tx_ctxtdesc(struct igbvf_ring *tx_ring, u32 vlan_macip_lens,
1971 u32 type_tucmd, u32 mss_l4len_idx)
1972{
1973 struct e1000_adv_tx_context_desc *context_desc;
1974 struct igbvf_buffer *buffer_info;
1975 u16 i = tx_ring->next_to_use;
1976
1977 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1978 buffer_info = &tx_ring->buffer_info[i];
1979
1980 i++;
1981 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
1982
1983 /* set bits to identify this as an advanced context descriptor */
1984 type_tucmd |= E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT;
1985
1986 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
1987 context_desc->seqnum_seed = 0;
1988 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
1989 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1990
1991 buffer_info->time_stamp = jiffies;
1992 buffer_info->dma = 0;
1993}
1994
1995static int igbvf_tso(struct igbvf_ring *tx_ring,
1996 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
1997{
1998 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
1999 union {
2000 struct iphdr *v4;
2001 struct ipv6hdr *v6;
2002 unsigned char *hdr;
2003 } ip;
2004 union {
2005 struct tcphdr *tcp;
2006 unsigned char *hdr;
2007 } l4;
2008 u32 paylen, l4_offset;
2009 int err;
2010
2011 if (skb->ip_summed != CHECKSUM_PARTIAL)
2012 return 0;
2013
2014 if (!skb_is_gso(skb))
2015 return 0;
2016
2017 err = skb_cow_head(skb, 0);
2018 if (err < 0)
2019 return err;
2020
2021 ip.hdr = skb_network_header(skb);
2022 l4.hdr = skb_checksum_start(skb);
2023
2024 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2025 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2026
2027 /* initialize outer IP header fields */
2028 if (ip.v4->version == 4) {
2029 unsigned char *csum_start = skb_checksum_start(skb);
2030 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
2031
2032 /* IP header will have to cancel out any data that
2033 * is not a part of the outer IP header
2034 */
2035 ip.v4->check = csum_fold(csum_partial(trans_start,
2036 csum_start - trans_start,
2037 0));
2038 type_tucmd |= E1000_ADVTXD_TUCMD_IPV4;
2039
2040 ip.v4->tot_len = 0;
2041 } else {
2042 ip.v6->payload_len = 0;
2043 }
2044
2045 /* determine offset of inner transport header */
2046 l4_offset = l4.hdr - skb->data;
2047
2048 /* compute length of segmentation header */
2049 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
2050
2051 /* remove payload length from inner checksum */
2052 paylen = skb->len - l4_offset;
2053 csum_replace_by_diff(&l4.tcp->check, htonl(paylen));
2054
2055 /* MSS L4LEN IDX */
2056 mss_l4len_idx = (*hdr_len - l4_offset) << E1000_ADVTXD_L4LEN_SHIFT;
2057 mss_l4len_idx |= skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT;
2058
2059 /* VLAN MACLEN IPLEN */
2060 vlan_macip_lens = l4.hdr - ip.hdr;
2061 vlan_macip_lens |= (ip.hdr - skb->data) << E1000_ADVTXD_MACLEN_SHIFT;
2062 vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2063
2064 igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx);
2065
2066 return 1;
2067}
2068
2069static inline bool igbvf_ipv6_csum_is_sctp(struct sk_buff *skb)
2070{
2071 unsigned int offset = 0;
2072
2073 ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
2074
2075 return offset == skb_checksum_start_offset(skb);
2076}
2077
2078static bool igbvf_tx_csum(struct igbvf_ring *tx_ring, struct sk_buff *skb,
2079 u32 tx_flags, __be16 protocol)
2080{
2081 u32 vlan_macip_lens = 0;
2082 u32 type_tucmd = 0;
2083
2084 if (skb->ip_summed != CHECKSUM_PARTIAL) {
2085csum_failed:
2086 if (!(tx_flags & IGBVF_TX_FLAGS_VLAN))
2087 return false;
2088 goto no_csum;
2089 }
2090
2091 switch (skb->csum_offset) {
2092 case offsetof(struct tcphdr, check):
2093 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2094 fallthrough;
2095 case offsetof(struct udphdr, check):
2096 break;
2097 case offsetof(struct sctphdr, checksum):
2098 /* validate that this is actually an SCTP request */
2099 if (((protocol == htons(ETH_P_IP)) &&
2100 (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
2101 ((protocol == htons(ETH_P_IPV6)) &&
2102 igbvf_ipv6_csum_is_sctp(skb))) {
2103 type_tucmd = E1000_ADVTXD_TUCMD_L4T_SCTP;
2104 break;
2105 }
2106 fallthrough;
2107 default:
2108 skb_checksum_help(skb);
2109 goto csum_failed;
2110 }
2111
2112 vlan_macip_lens = skb_checksum_start_offset(skb) -
2113 skb_network_offset(skb);
2114no_csum:
2115 vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT;
2116 vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2117
2118 igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, 0);
2119 return true;
2120}
2121
2122static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2123{
2124 struct igbvf_adapter *adapter = netdev_priv(netdev);
2125
2126 /* there is enough descriptors then we don't need to worry */
2127 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2128 return 0;
2129
2130 netif_stop_queue(netdev);
2131
2132 /* Herbert's original patch had:
2133 * smp_mb__after_netif_stop_queue();
2134 * but since that doesn't exist yet, just open code it.
2135 */
2136 smp_mb();
2137
2138 /* We need to check again just in case room has been made available */
2139 if (igbvf_desc_unused(adapter->tx_ring) < size)
2140 return -EBUSY;
2141
2142 netif_wake_queue(netdev);
2143
2144 ++adapter->restart_queue;
2145 return 0;
2146}
2147
2148#define IGBVF_MAX_TXD_PWR 16
2149#define IGBVF_MAX_DATA_PER_TXD (1u << IGBVF_MAX_TXD_PWR)
2150
2151static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2152 struct igbvf_ring *tx_ring,
2153 struct sk_buff *skb)
2154{
2155 struct igbvf_buffer *buffer_info;
2156 struct pci_dev *pdev = adapter->pdev;
2157 unsigned int len = skb_headlen(skb);
2158 unsigned int count = 0, i;
2159 unsigned int f;
2160
2161 i = tx_ring->next_to_use;
2162
2163 buffer_info = &tx_ring->buffer_info[i];
2164 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2165 buffer_info->length = len;
2166 /* set time_stamp *before* dma to help avoid a possible race */
2167 buffer_info->time_stamp = jiffies;
2168 buffer_info->mapped_as_page = false;
2169 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2170 DMA_TO_DEVICE);
2171 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2172 goto dma_error;
2173
2174 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2175 const skb_frag_t *frag;
2176
2177 count++;
2178 i++;
2179 if (i == tx_ring->count)
2180 i = 0;
2181
2182 frag = &skb_shinfo(skb)->frags[f];
2183 len = skb_frag_size(frag);
2184
2185 buffer_info = &tx_ring->buffer_info[i];
2186 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2187 buffer_info->length = len;
2188 buffer_info->time_stamp = jiffies;
2189 buffer_info->mapped_as_page = true;
2190 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len,
2191 DMA_TO_DEVICE);
2192 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2193 goto dma_error;
2194 }
2195
2196 tx_ring->buffer_info[i].skb = skb;
2197
2198 return ++count;
2199
2200dma_error:
2201 dev_err(&pdev->dev, "TX DMA map failed\n");
2202
2203 /* clear timestamp and dma mappings for failed buffer_info mapping */
2204 buffer_info->dma = 0;
2205 buffer_info->time_stamp = 0;
2206 buffer_info->length = 0;
2207 buffer_info->mapped_as_page = false;
2208 if (count)
2209 count--;
2210
2211 /* clear timestamp and dma mappings for remaining portion of packet */
2212 while (count--) {
2213 if (i == 0)
2214 i += tx_ring->count;
2215 i--;
2216 buffer_info = &tx_ring->buffer_info[i];
2217 igbvf_put_txbuf(adapter, buffer_info);
2218 }
2219
2220 return 0;
2221}
2222
2223static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2224 struct igbvf_ring *tx_ring,
2225 int tx_flags, int count,
2226 unsigned int first, u32 paylen,
2227 u8 hdr_len)
2228{
2229 union e1000_adv_tx_desc *tx_desc = NULL;
2230 struct igbvf_buffer *buffer_info;
2231 u32 olinfo_status = 0, cmd_type_len;
2232 unsigned int i;
2233
2234 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2235 E1000_ADVTXD_DCMD_DEXT);
2236
2237 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2238 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2239
2240 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2241 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2242
2243 /* insert tcp checksum */
2244 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2245
2246 /* insert ip checksum */
2247 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2248 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2249
2250 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2251 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2252 }
2253
2254 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2255
2256 i = tx_ring->next_to_use;
2257 while (count--) {
2258 buffer_info = &tx_ring->buffer_info[i];
2259 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2260 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2261 tx_desc->read.cmd_type_len =
2262 cpu_to_le32(cmd_type_len | buffer_info->length);
2263 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2264 i++;
2265 if (i == tx_ring->count)
2266 i = 0;
2267 }
2268
2269 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2270 /* Force memory writes to complete before letting h/w
2271 * know there are new descriptors to fetch. (Only
2272 * applicable for weak-ordered memory model archs,
2273 * such as IA-64).
2274 */
2275 wmb();
2276
2277 tx_ring->buffer_info[first].next_to_watch = tx_desc;
2278 tx_ring->next_to_use = i;
2279 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2280}
2281
2282static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2283 struct net_device *netdev,
2284 struct igbvf_ring *tx_ring)
2285{
2286 struct igbvf_adapter *adapter = netdev_priv(netdev);
2287 unsigned int first, tx_flags = 0;
2288 u8 hdr_len = 0;
2289 int count = 0;
2290 int tso = 0;
2291 __be16 protocol = vlan_get_protocol(skb);
2292
2293 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2294 dev_kfree_skb_any(skb);
2295 return NETDEV_TX_OK;
2296 }
2297
2298 if (skb->len <= 0) {
2299 dev_kfree_skb_any(skb);
2300 return NETDEV_TX_OK;
2301 }
2302
2303 /* need: count + 4 desc gap to keep tail from touching
2304 * + 2 desc gap to keep tail from touching head,
2305 * + 1 desc for skb->data,
2306 * + 1 desc for context descriptor,
2307 * head, otherwise try next time
2308 */
2309 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2310 /* this is a hard error */
2311 return NETDEV_TX_BUSY;
2312 }
2313
2314 if (skb_vlan_tag_present(skb)) {
2315 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2316 tx_flags |= (skb_vlan_tag_get(skb) <<
2317 IGBVF_TX_FLAGS_VLAN_SHIFT);
2318 }
2319
2320 if (protocol == htons(ETH_P_IP))
2321 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2322
2323 first = tx_ring->next_to_use;
2324
2325 tso = igbvf_tso(tx_ring, skb, tx_flags, &hdr_len);
2326 if (unlikely(tso < 0)) {
2327 dev_kfree_skb_any(skb);
2328 return NETDEV_TX_OK;
2329 }
2330
2331 if (tso)
2332 tx_flags |= IGBVF_TX_FLAGS_TSO;
2333 else if (igbvf_tx_csum(tx_ring, skb, tx_flags, protocol) &&
2334 (skb->ip_summed == CHECKSUM_PARTIAL))
2335 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2336
2337 /* count reflects descriptors mapped, if 0 then mapping error
2338 * has occurred and we need to rewind the descriptor queue
2339 */
2340 count = igbvf_tx_map_adv(adapter, tx_ring, skb);
2341
2342 if (count) {
2343 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2344 first, skb->len, hdr_len);
2345 /* Make sure there is space in the ring for the next send. */
2346 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2347 } else {
2348 dev_kfree_skb_any(skb);
2349 tx_ring->buffer_info[first].time_stamp = 0;
2350 tx_ring->next_to_use = first;
2351 }
2352
2353 return NETDEV_TX_OK;
2354}
2355
2356static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2357 struct net_device *netdev)
2358{
2359 struct igbvf_adapter *adapter = netdev_priv(netdev);
2360 struct igbvf_ring *tx_ring;
2361
2362 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2363 dev_kfree_skb_any(skb);
2364 return NETDEV_TX_OK;
2365 }
2366
2367 tx_ring = &adapter->tx_ring[0];
2368
2369 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2370}
2371
2372/**
2373 * igbvf_tx_timeout - Respond to a Tx Hang
2374 * @netdev: network interface device structure
2375 **/
2376static void igbvf_tx_timeout(struct net_device *netdev, unsigned int txqueue)
2377{
2378 struct igbvf_adapter *adapter = netdev_priv(netdev);
2379
2380 /* Do the reset outside of interrupt context */
2381 adapter->tx_timeout_count++;
2382 schedule_work(&adapter->reset_task);
2383}
2384
2385static void igbvf_reset_task(struct work_struct *work)
2386{
2387 struct igbvf_adapter *adapter;
2388
2389 adapter = container_of(work, struct igbvf_adapter, reset_task);
2390
2391 igbvf_reinit_locked(adapter);
2392}
2393
2394/**
2395 * igbvf_change_mtu - Change the Maximum Transfer Unit
2396 * @netdev: network interface device structure
2397 * @new_mtu: new value for maximum frame size
2398 *
2399 * Returns 0 on success, negative on failure
2400 **/
2401static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2402{
2403 struct igbvf_adapter *adapter = netdev_priv(netdev);
2404 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2405
2406 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2407 usleep_range(1000, 2000);
2408 /* igbvf_down has a dependency on max_frame_size */
2409 adapter->max_frame_size = max_frame;
2410 if (netif_running(netdev))
2411 igbvf_down(adapter);
2412
2413 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2414 * means we reserve 2 more, this pushes us to allocate from the next
2415 * larger slab size.
2416 * i.e. RXBUFFER_2048 --> size-4096 slab
2417 * However with the new *_jumbo_rx* routines, jumbo receives will use
2418 * fragmented skbs
2419 */
2420
2421 if (max_frame <= 1024)
2422 adapter->rx_buffer_len = 1024;
2423 else if (max_frame <= 2048)
2424 adapter->rx_buffer_len = 2048;
2425 else
2426#if (PAGE_SIZE / 2) > 16384
2427 adapter->rx_buffer_len = 16384;
2428#else
2429 adapter->rx_buffer_len = PAGE_SIZE / 2;
2430#endif
2431
2432 /* adjust allocation if LPE protects us, and we aren't using SBP */
2433 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2434 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2435 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2436 ETH_FCS_LEN;
2437
2438 netdev_dbg(netdev, "changing MTU from %d to %d\n",
2439 netdev->mtu, new_mtu);
2440 netdev->mtu = new_mtu;
2441
2442 if (netif_running(netdev))
2443 igbvf_up(adapter);
2444 else
2445 igbvf_reset(adapter);
2446
2447 clear_bit(__IGBVF_RESETTING, &adapter->state);
2448
2449 return 0;
2450}
2451
2452static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2453{
2454 switch (cmd) {
2455 default:
2456 return -EOPNOTSUPP;
2457 }
2458}
2459
2460static int igbvf_suspend(struct device *dev_d)
2461{
2462 struct net_device *netdev = dev_get_drvdata(dev_d);
2463 struct igbvf_adapter *adapter = netdev_priv(netdev);
2464
2465 netif_device_detach(netdev);
2466
2467 if (netif_running(netdev)) {
2468 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2469 igbvf_down(adapter);
2470 igbvf_free_irq(adapter);
2471 }
2472
2473 return 0;
2474}
2475
2476static int __maybe_unused igbvf_resume(struct device *dev_d)
2477{
2478 struct pci_dev *pdev = to_pci_dev(dev_d);
2479 struct net_device *netdev = pci_get_drvdata(pdev);
2480 struct igbvf_adapter *adapter = netdev_priv(netdev);
2481 u32 err;
2482
2483 pci_set_master(pdev);
2484
2485 if (netif_running(netdev)) {
2486 err = igbvf_request_irq(adapter);
2487 if (err)
2488 return err;
2489 }
2490
2491 igbvf_reset(adapter);
2492
2493 if (netif_running(netdev))
2494 igbvf_up(adapter);
2495
2496 netif_device_attach(netdev);
2497
2498 return 0;
2499}
2500
2501static void igbvf_shutdown(struct pci_dev *pdev)
2502{
2503 igbvf_suspend(&pdev->dev);
2504}
2505
2506#ifdef CONFIG_NET_POLL_CONTROLLER
2507/* Polling 'interrupt' - used by things like netconsole to send skbs
2508 * without having to re-enable interrupts. It's not called while
2509 * the interrupt routine is executing.
2510 */
2511static void igbvf_netpoll(struct net_device *netdev)
2512{
2513 struct igbvf_adapter *adapter = netdev_priv(netdev);
2514
2515 disable_irq(adapter->pdev->irq);
2516
2517 igbvf_clean_tx_irq(adapter->tx_ring);
2518
2519 enable_irq(adapter->pdev->irq);
2520}
2521#endif
2522
2523/**
2524 * igbvf_io_error_detected - called when PCI error is detected
2525 * @pdev: Pointer to PCI device
2526 * @state: The current pci connection state
2527 *
2528 * This function is called after a PCI bus error affecting
2529 * this device has been detected.
2530 */
2531static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2532 pci_channel_state_t state)
2533{
2534 struct net_device *netdev = pci_get_drvdata(pdev);
2535 struct igbvf_adapter *adapter = netdev_priv(netdev);
2536
2537 netif_device_detach(netdev);
2538
2539 if (state == pci_channel_io_perm_failure)
2540 return PCI_ERS_RESULT_DISCONNECT;
2541
2542 if (netif_running(netdev))
2543 igbvf_down(adapter);
2544 pci_disable_device(pdev);
2545
2546 /* Request a slot slot reset. */
2547 return PCI_ERS_RESULT_NEED_RESET;
2548}
2549
2550/**
2551 * igbvf_io_slot_reset - called after the pci bus has been reset.
2552 * @pdev: Pointer to PCI device
2553 *
2554 * Restart the card from scratch, as if from a cold-boot. Implementation
2555 * resembles the first-half of the igbvf_resume routine.
2556 */
2557static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2558{
2559 struct net_device *netdev = pci_get_drvdata(pdev);
2560 struct igbvf_adapter *adapter = netdev_priv(netdev);
2561
2562 if (pci_enable_device_mem(pdev)) {
2563 dev_err(&pdev->dev,
2564 "Cannot re-enable PCI device after reset.\n");
2565 return PCI_ERS_RESULT_DISCONNECT;
2566 }
2567 pci_set_master(pdev);
2568
2569 igbvf_reset(adapter);
2570
2571 return PCI_ERS_RESULT_RECOVERED;
2572}
2573
2574/**
2575 * igbvf_io_resume - called when traffic can start flowing again.
2576 * @pdev: Pointer to PCI device
2577 *
2578 * This callback is called when the error recovery driver tells us that
2579 * its OK to resume normal operation. Implementation resembles the
2580 * second-half of the igbvf_resume routine.
2581 */
2582static void igbvf_io_resume(struct pci_dev *pdev)
2583{
2584 struct net_device *netdev = pci_get_drvdata(pdev);
2585 struct igbvf_adapter *adapter = netdev_priv(netdev);
2586
2587 if (netif_running(netdev)) {
2588 if (igbvf_up(adapter)) {
2589 dev_err(&pdev->dev,
2590 "can't bring device back up after reset\n");
2591 return;
2592 }
2593 }
2594
2595 netif_device_attach(netdev);
2596}
2597
2598static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2599{
2600 struct e1000_hw *hw = &adapter->hw;
2601 struct net_device *netdev = adapter->netdev;
2602 struct pci_dev *pdev = adapter->pdev;
2603
2604 if (hw->mac.type == e1000_vfadapt_i350)
2605 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n");
2606 else
2607 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2608 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2609}
2610
2611static int igbvf_set_features(struct net_device *netdev,
2612 netdev_features_t features)
2613{
2614 struct igbvf_adapter *adapter = netdev_priv(netdev);
2615
2616 if (features & NETIF_F_RXCSUM)
2617 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED;
2618 else
2619 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED;
2620
2621 return 0;
2622}
2623
2624#define IGBVF_MAX_MAC_HDR_LEN 127
2625#define IGBVF_MAX_NETWORK_HDR_LEN 511
2626
2627static netdev_features_t
2628igbvf_features_check(struct sk_buff *skb, struct net_device *dev,
2629 netdev_features_t features)
2630{
2631 unsigned int network_hdr_len, mac_hdr_len;
2632
2633 /* Make certain the headers can be described by a context descriptor */
2634 mac_hdr_len = skb_network_header(skb) - skb->data;
2635 if (unlikely(mac_hdr_len > IGBVF_MAX_MAC_HDR_LEN))
2636 return features & ~(NETIF_F_HW_CSUM |
2637 NETIF_F_SCTP_CRC |
2638 NETIF_F_HW_VLAN_CTAG_TX |
2639 NETIF_F_TSO |
2640 NETIF_F_TSO6);
2641
2642 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
2643 if (unlikely(network_hdr_len > IGBVF_MAX_NETWORK_HDR_LEN))
2644 return features & ~(NETIF_F_HW_CSUM |
2645 NETIF_F_SCTP_CRC |
2646 NETIF_F_TSO |
2647 NETIF_F_TSO6);
2648
2649 /* We can only support IPV4 TSO in tunnels if we can mangle the
2650 * inner IP ID field, so strip TSO if MANGLEID is not supported.
2651 */
2652 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
2653 features &= ~NETIF_F_TSO;
2654
2655 return features;
2656}
2657
2658static const struct net_device_ops igbvf_netdev_ops = {
2659 .ndo_open = igbvf_open,
2660 .ndo_stop = igbvf_close,
2661 .ndo_start_xmit = igbvf_xmit_frame,
2662 .ndo_set_rx_mode = igbvf_set_rx_mode,
2663 .ndo_set_mac_address = igbvf_set_mac,
2664 .ndo_change_mtu = igbvf_change_mtu,
2665 .ndo_do_ioctl = igbvf_ioctl,
2666 .ndo_tx_timeout = igbvf_tx_timeout,
2667 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2668 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2669#ifdef CONFIG_NET_POLL_CONTROLLER
2670 .ndo_poll_controller = igbvf_netpoll,
2671#endif
2672 .ndo_set_features = igbvf_set_features,
2673 .ndo_features_check = igbvf_features_check,
2674};
2675
2676/**
2677 * igbvf_probe - Device Initialization Routine
2678 * @pdev: PCI device information struct
2679 * @ent: entry in igbvf_pci_tbl
2680 *
2681 * Returns 0 on success, negative on failure
2682 *
2683 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2684 * The OS initialization, configuring of the adapter private structure,
2685 * and a hardware reset occur.
2686 **/
2687static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2688{
2689 struct net_device *netdev;
2690 struct igbvf_adapter *adapter;
2691 struct e1000_hw *hw;
2692 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2693
2694 static int cards_found;
2695 int err, pci_using_dac;
2696
2697 err = pci_enable_device_mem(pdev);
2698 if (err)
2699 return err;
2700
2701 pci_using_dac = 0;
2702 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2703 if (!err) {
2704 pci_using_dac = 1;
2705 } else {
2706 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2707 if (err) {
2708 dev_err(&pdev->dev,
2709 "No usable DMA configuration, aborting\n");
2710 goto err_dma;
2711 }
2712 }
2713
2714 err = pci_request_regions(pdev, igbvf_driver_name);
2715 if (err)
2716 goto err_pci_reg;
2717
2718 pci_set_master(pdev);
2719
2720 err = -ENOMEM;
2721 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2722 if (!netdev)
2723 goto err_alloc_etherdev;
2724
2725 SET_NETDEV_DEV(netdev, &pdev->dev);
2726
2727 pci_set_drvdata(pdev, netdev);
2728 adapter = netdev_priv(netdev);
2729 hw = &adapter->hw;
2730 adapter->netdev = netdev;
2731 adapter->pdev = pdev;
2732 adapter->ei = ei;
2733 adapter->pba = ei->pba;
2734 adapter->flags = ei->flags;
2735 adapter->hw.back = adapter;
2736 adapter->hw.mac.type = ei->mac;
2737 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2738
2739 /* PCI config space info */
2740
2741 hw->vendor_id = pdev->vendor;
2742 hw->device_id = pdev->device;
2743 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2744 hw->subsystem_device_id = pdev->subsystem_device;
2745 hw->revision_id = pdev->revision;
2746
2747 err = -EIO;
2748 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2749 pci_resource_len(pdev, 0));
2750
2751 if (!adapter->hw.hw_addr)
2752 goto err_ioremap;
2753
2754 if (ei->get_variants) {
2755 err = ei->get_variants(adapter);
2756 if (err)
2757 goto err_get_variants;
2758 }
2759
2760 /* setup adapter struct */
2761 err = igbvf_sw_init(adapter);
2762 if (err)
2763 goto err_sw_init;
2764
2765 /* construct the net_device struct */
2766 netdev->netdev_ops = &igbvf_netdev_ops;
2767
2768 igbvf_set_ethtool_ops(netdev);
2769 netdev->watchdog_timeo = 5 * HZ;
2770 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2771
2772 adapter->bd_number = cards_found++;
2773
2774 netdev->hw_features = NETIF_F_SG |
2775 NETIF_F_TSO |
2776 NETIF_F_TSO6 |
2777 NETIF_F_RXCSUM |
2778 NETIF_F_HW_CSUM |
2779 NETIF_F_SCTP_CRC;
2780
2781#define IGBVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
2782 NETIF_F_GSO_GRE_CSUM | \
2783 NETIF_F_GSO_IPXIP4 | \
2784 NETIF_F_GSO_IPXIP6 | \
2785 NETIF_F_GSO_UDP_TUNNEL | \
2786 NETIF_F_GSO_UDP_TUNNEL_CSUM)
2787
2788 netdev->gso_partial_features = IGBVF_GSO_PARTIAL_FEATURES;
2789 netdev->hw_features |= NETIF_F_GSO_PARTIAL |
2790 IGBVF_GSO_PARTIAL_FEATURES;
2791
2792 netdev->features = netdev->hw_features;
2793
2794 if (pci_using_dac)
2795 netdev->features |= NETIF_F_HIGHDMA;
2796
2797 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
2798 netdev->mpls_features |= NETIF_F_HW_CSUM;
2799 netdev->hw_enc_features |= netdev->vlan_features;
2800
2801 /* set this bit last since it cannot be part of vlan_features */
2802 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
2803 NETIF_F_HW_VLAN_CTAG_RX |
2804 NETIF_F_HW_VLAN_CTAG_TX;
2805
2806 /* MTU range: 68 - 9216 */
2807 netdev->min_mtu = ETH_MIN_MTU;
2808 netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE;
2809
2810 spin_lock_bh(&hw->mbx_lock);
2811
2812 /*reset the controller to put the device in a known good state */
2813 err = hw->mac.ops.reset_hw(hw);
2814 if (err) {
2815 dev_info(&pdev->dev,
2816 "PF still in reset state. Is the PF interface up?\n");
2817 } else {
2818 err = hw->mac.ops.read_mac_addr(hw);
2819 if (err)
2820 dev_info(&pdev->dev, "Error reading MAC address.\n");
2821 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2822 dev_info(&pdev->dev,
2823 "MAC address not assigned by administrator.\n");
2824 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
2825 netdev->addr_len);
2826 }
2827
2828 spin_unlock_bh(&hw->mbx_lock);
2829
2830 if (!is_valid_ether_addr(netdev->dev_addr)) {
2831 dev_info(&pdev->dev, "Assigning random MAC address.\n");
2832 eth_hw_addr_random(netdev);
2833 memcpy(adapter->hw.mac.addr, netdev->dev_addr,
2834 netdev->addr_len);
2835 }
2836
2837 timer_setup(&adapter->watchdog_timer, igbvf_watchdog, 0);
2838
2839 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2840 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2841
2842 /* ring size defaults */
2843 adapter->rx_ring->count = 1024;
2844 adapter->tx_ring->count = 1024;
2845
2846 /* reset the hardware with the new settings */
2847 igbvf_reset(adapter);
2848
2849 /* set hardware-specific flags */
2850 if (adapter->hw.mac.type == e1000_vfadapt_i350)
2851 adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP;
2852
2853 strcpy(netdev->name, "eth%d");
2854 err = register_netdev(netdev);
2855 if (err)
2856 goto err_hw_init;
2857
2858 /* tell the stack to leave us alone until igbvf_open() is called */
2859 netif_carrier_off(netdev);
2860 netif_stop_queue(netdev);
2861
2862 igbvf_print_device_info(adapter);
2863
2864 igbvf_initialize_last_counter_stats(adapter);
2865
2866 return 0;
2867
2868err_hw_init:
2869 kfree(adapter->tx_ring);
2870 kfree(adapter->rx_ring);
2871err_sw_init:
2872 igbvf_reset_interrupt_capability(adapter);
2873err_get_variants:
2874 iounmap(adapter->hw.hw_addr);
2875err_ioremap:
2876 free_netdev(netdev);
2877err_alloc_etherdev:
2878 pci_release_regions(pdev);
2879err_pci_reg:
2880err_dma:
2881 pci_disable_device(pdev);
2882 return err;
2883}
2884
2885/**
2886 * igbvf_remove - Device Removal Routine
2887 * @pdev: PCI device information struct
2888 *
2889 * igbvf_remove is called by the PCI subsystem to alert the driver
2890 * that it should release a PCI device. The could be caused by a
2891 * Hot-Plug event, or because the driver is going to be removed from
2892 * memory.
2893 **/
2894static void igbvf_remove(struct pci_dev *pdev)
2895{
2896 struct net_device *netdev = pci_get_drvdata(pdev);
2897 struct igbvf_adapter *adapter = netdev_priv(netdev);
2898 struct e1000_hw *hw = &adapter->hw;
2899
2900 /* The watchdog timer may be rescheduled, so explicitly
2901 * disable it from being rescheduled.
2902 */
2903 set_bit(__IGBVF_DOWN, &adapter->state);
2904 del_timer_sync(&adapter->watchdog_timer);
2905
2906 cancel_work_sync(&adapter->reset_task);
2907 cancel_work_sync(&adapter->watchdog_task);
2908
2909 unregister_netdev(netdev);
2910
2911 igbvf_reset_interrupt_capability(adapter);
2912
2913 /* it is important to delete the NAPI struct prior to freeing the
2914 * Rx ring so that you do not end up with null pointer refs
2915 */
2916 netif_napi_del(&adapter->rx_ring->napi);
2917 kfree(adapter->tx_ring);
2918 kfree(adapter->rx_ring);
2919
2920 iounmap(hw->hw_addr);
2921 if (hw->flash_address)
2922 iounmap(hw->flash_address);
2923 pci_release_regions(pdev);
2924
2925 free_netdev(netdev);
2926
2927 pci_disable_device(pdev);
2928}
2929
2930/* PCI Error Recovery (ERS) */
2931static const struct pci_error_handlers igbvf_err_handler = {
2932 .error_detected = igbvf_io_error_detected,
2933 .slot_reset = igbvf_io_slot_reset,
2934 .resume = igbvf_io_resume,
2935};
2936
2937static const struct pci_device_id igbvf_pci_tbl[] = {
2938 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2939 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
2940 { } /* terminate list */
2941};
2942MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2943
2944static SIMPLE_DEV_PM_OPS(igbvf_pm_ops, igbvf_suspend, igbvf_resume);
2945
2946/* PCI Device API Driver */
2947static struct pci_driver igbvf_driver = {
2948 .name = igbvf_driver_name,
2949 .id_table = igbvf_pci_tbl,
2950 .probe = igbvf_probe,
2951 .remove = igbvf_remove,
2952 .driver.pm = &igbvf_pm_ops,
2953 .shutdown = igbvf_shutdown,
2954 .err_handler = &igbvf_err_handler
2955};
2956
2957/**
2958 * igbvf_init_module - Driver Registration Routine
2959 *
2960 * igbvf_init_module is the first routine called when the driver is
2961 * loaded. All it does is register with the PCI subsystem.
2962 **/
2963static int __init igbvf_init_module(void)
2964{
2965 int ret;
2966
2967 pr_info("%s\n", igbvf_driver_string);
2968 pr_info("%s\n", igbvf_copyright);
2969
2970 ret = pci_register_driver(&igbvf_driver);
2971
2972 return ret;
2973}
2974module_init(igbvf_init_module);
2975
2976/**
2977 * igbvf_exit_module - Driver Exit Cleanup Routine
2978 *
2979 * igbvf_exit_module is called just before the driver is removed
2980 * from memory.
2981 **/
2982static void __exit igbvf_exit_module(void)
2983{
2984 pci_unregister_driver(&igbvf_driver);
2985}
2986module_exit(igbvf_exit_module);
2987
2988MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2989MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
2990MODULE_LICENSE("GPL v2");
2991
2992/* netdev.c */