1 /*******************************************************************************
2
3 Intel(R) 82576 Virtual Function Linux driver
4 Copyright(c) 2009 - 2012 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29
30 #include <linux/module.h>
31 #include <linux/types.h>
32 #include <linux/init.h>
33 #include <linux/pci.h>
34 #include <linux/vmalloc.h>
35 #include <linux/pagemap.h>
36 #include <linux/delay.h>
37 #include <linux/netdevice.h>
38 #include <linux/tcp.h>
39 #include <linux/ipv6.h>
40 #include <linux/slab.h>
41 #include <net/checksum.h>
42 #include <net/ip6_checksum.h>
43 #include <linux/mii.h>
44 #include <linux/ethtool.h>
45 #include <linux/if_vlan.h>
46 #include <linux/prefetch.h>
47
48 #include "igbvf.h"
49
50 #define DRV_VERSION "2.0.1-k"
51 char igbvf_driver_name[] = "igbvf";
52 const char igbvf_driver_version[] = DRV_VERSION;
53 static const char igbvf_driver_string[] =
54 "Intel(R) Gigabit Virtual Function Network Driver";
55 static const char igbvf_copyright[] =
56 "Copyright (c) 2009 - 2012 Intel Corporation.";
57
58 static int igbvf_poll(struct napi_struct *napi, int budget);
59 static void igbvf_reset(struct igbvf_adapter *);
60 static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
61 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
62
63 static struct igbvf_info igbvf_vf_info = {
64 .mac = e1000_vfadapt,
65 .flags = 0,
66 .pba = 10,
67 .init_ops = e1000_init_function_pointers_vf,
68 };
69
70 static struct igbvf_info igbvf_i350_vf_info = {
71 .mac = e1000_vfadapt_i350,
72 .flags = 0,
73 .pba = 10,
74 .init_ops = e1000_init_function_pointers_vf,
75 };
76
77 static const struct igbvf_info *igbvf_info_tbl[] = {
78 [board_vf] = &igbvf_vf_info,
79 [board_i350_vf] = &igbvf_i350_vf_info,
80 };
81
82 /**
83 * igbvf_desc_unused - calculate if we have unused descriptors
84 **/
igbvf_desc_unused(struct igbvf_ring * ring)85 static int igbvf_desc_unused(struct igbvf_ring *ring)
86 {
87 if (ring->next_to_clean > ring->next_to_use)
88 return ring->next_to_clean - ring->next_to_use - 1;
89
90 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
91 }
92
93 /**
94 * igbvf_receive_skb - helper function to handle Rx indications
95 * @adapter: board private structure
96 * @status: descriptor status field as written by hardware
97 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
98 * @skb: pointer to sk_buff to be indicated to stack
99 **/
igbvf_receive_skb(struct igbvf_adapter * adapter,struct net_device * netdev,struct sk_buff * skb,u32 status,u16 vlan)100 static void igbvf_receive_skb(struct igbvf_adapter *adapter,
101 struct net_device *netdev,
102 struct sk_buff *skb,
103 u32 status, u16 vlan)
104 {
105 if (status & E1000_RXD_STAT_VP) {
106 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
107 if (test_bit(vid, adapter->active_vlans))
108 __vlan_hwaccel_put_tag(skb, vid);
109 }
110 netif_receive_skb(skb);
111 }
112
igbvf_rx_checksum_adv(struct igbvf_adapter * adapter,u32 status_err,struct sk_buff * skb)113 static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
114 u32 status_err, struct sk_buff *skb)
115 {
116 skb_checksum_none_assert(skb);
117
118 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
119 if ((status_err & E1000_RXD_STAT_IXSM) ||
120 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
121 return;
122
123 /* TCP/UDP checksum error bit is set */
124 if (status_err &
125 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
126 /* let the stack verify checksum errors */
127 adapter->hw_csum_err++;
128 return;
129 }
130
131 /* It must be a TCP or UDP packet with a valid checksum */
132 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
133 skb->ip_summed = CHECKSUM_UNNECESSARY;
134
135 adapter->hw_csum_good++;
136 }
137
138 /**
139 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
140 * @rx_ring: address of ring structure to repopulate
141 * @cleaned_count: number of buffers to repopulate
142 **/
igbvf_alloc_rx_buffers(struct igbvf_ring * rx_ring,int cleaned_count)143 static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
144 int cleaned_count)
145 {
146 struct igbvf_adapter *adapter = rx_ring->adapter;
147 struct net_device *netdev = adapter->netdev;
148 struct pci_dev *pdev = adapter->pdev;
149 union e1000_adv_rx_desc *rx_desc;
150 struct igbvf_buffer *buffer_info;
151 struct sk_buff *skb;
152 unsigned int i;
153 int bufsz;
154
155 i = rx_ring->next_to_use;
156 buffer_info = &rx_ring->buffer_info[i];
157
158 if (adapter->rx_ps_hdr_size)
159 bufsz = adapter->rx_ps_hdr_size;
160 else
161 bufsz = adapter->rx_buffer_len;
162
163 while (cleaned_count--) {
164 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
165
166 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
167 if (!buffer_info->page) {
168 buffer_info->page = alloc_page(GFP_ATOMIC);
169 if (!buffer_info->page) {
170 adapter->alloc_rx_buff_failed++;
171 goto no_buffers;
172 }
173 buffer_info->page_offset = 0;
174 } else {
175 buffer_info->page_offset ^= PAGE_SIZE / 2;
176 }
177 buffer_info->page_dma =
178 dma_map_page(&pdev->dev, buffer_info->page,
179 buffer_info->page_offset,
180 PAGE_SIZE / 2,
181 DMA_FROM_DEVICE);
182 }
183
184 if (!buffer_info->skb) {
185 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
186 if (!skb) {
187 adapter->alloc_rx_buff_failed++;
188 goto no_buffers;
189 }
190
191 buffer_info->skb = skb;
192 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
193 bufsz,
194 DMA_FROM_DEVICE);
195 }
196 /* Refresh the desc even if buffer_addrs didn't change because
197 * each write-back erases this info. */
198 if (adapter->rx_ps_hdr_size) {
199 rx_desc->read.pkt_addr =
200 cpu_to_le64(buffer_info->page_dma);
201 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
202 } else {
203 rx_desc->read.pkt_addr =
204 cpu_to_le64(buffer_info->dma);
205 rx_desc->read.hdr_addr = 0;
206 }
207
208 i++;
209 if (i == rx_ring->count)
210 i = 0;
211 buffer_info = &rx_ring->buffer_info[i];
212 }
213
214 no_buffers:
215 if (rx_ring->next_to_use != i) {
216 rx_ring->next_to_use = i;
217 if (i == 0)
218 i = (rx_ring->count - 1);
219 else
220 i--;
221
222 /* Force memory writes to complete before letting h/w
223 * know there are new descriptors to fetch. (Only
224 * applicable for weak-ordered memory model archs,
225 * such as IA-64). */
226 wmb();
227 writel(i, adapter->hw.hw_addr + rx_ring->tail);
228 }
229 }
230
231 /**
232 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
233 * @adapter: board private structure
234 *
235 * the return value indicates whether actual cleaning was done, there
236 * is no guarantee that everything was cleaned
237 **/
igbvf_clean_rx_irq(struct igbvf_adapter * adapter,int * work_done,int work_to_do)238 static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
239 int *work_done, int work_to_do)
240 {
241 struct igbvf_ring *rx_ring = adapter->rx_ring;
242 struct net_device *netdev = adapter->netdev;
243 struct pci_dev *pdev = adapter->pdev;
244 union e1000_adv_rx_desc *rx_desc, *next_rxd;
245 struct igbvf_buffer *buffer_info, *next_buffer;
246 struct sk_buff *skb;
247 bool cleaned = false;
248 int cleaned_count = 0;
249 unsigned int total_bytes = 0, total_packets = 0;
250 unsigned int i;
251 u32 length, hlen, staterr;
252
253 i = rx_ring->next_to_clean;
254 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
255 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
256
257 while (staterr & E1000_RXD_STAT_DD) {
258 if (*work_done >= work_to_do)
259 break;
260 (*work_done)++;
261 rmb(); /* read descriptor and rx_buffer_info after status DD */
262
263 buffer_info = &rx_ring->buffer_info[i];
264
265 /* HW will not DMA in data larger than the given buffer, even
266 * if it parses the (NFS, of course) header to be larger. In
267 * that case, it fills the header buffer and spills the rest
268 * into the page.
269 */
270 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) &
271 E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
272 if (hlen > adapter->rx_ps_hdr_size)
273 hlen = adapter->rx_ps_hdr_size;
274
275 length = le16_to_cpu(rx_desc->wb.upper.length);
276 cleaned = true;
277 cleaned_count++;
278
279 skb = buffer_info->skb;
280 prefetch(skb->data - NET_IP_ALIGN);
281 buffer_info->skb = NULL;
282 if (!adapter->rx_ps_hdr_size) {
283 dma_unmap_single(&pdev->dev, buffer_info->dma,
284 adapter->rx_buffer_len,
285 DMA_FROM_DEVICE);
286 buffer_info->dma = 0;
287 skb_put(skb, length);
288 goto send_up;
289 }
290
291 if (!skb_shinfo(skb)->nr_frags) {
292 dma_unmap_single(&pdev->dev, buffer_info->dma,
293 adapter->rx_ps_hdr_size,
294 DMA_FROM_DEVICE);
295 skb_put(skb, hlen);
296 }
297
298 if (length) {
299 dma_unmap_page(&pdev->dev, buffer_info->page_dma,
300 PAGE_SIZE / 2,
301 DMA_FROM_DEVICE);
302 buffer_info->page_dma = 0;
303
304 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
305 buffer_info->page,
306 buffer_info->page_offset,
307 length);
308
309 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
310 (page_count(buffer_info->page) != 1))
311 buffer_info->page = NULL;
312 else
313 get_page(buffer_info->page);
314
315 skb->len += length;
316 skb->data_len += length;
317 skb->truesize += PAGE_SIZE / 2;
318 }
319 send_up:
320 i++;
321 if (i == rx_ring->count)
322 i = 0;
323 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
324 prefetch(next_rxd);
325 next_buffer = &rx_ring->buffer_info[i];
326
327 if (!(staterr & E1000_RXD_STAT_EOP)) {
328 buffer_info->skb = next_buffer->skb;
329 buffer_info->dma = next_buffer->dma;
330 next_buffer->skb = skb;
331 next_buffer->dma = 0;
332 goto next_desc;
333 }
334
335 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
336 dev_kfree_skb_irq(skb);
337 goto next_desc;
338 }
339
340 total_bytes += skb->len;
341 total_packets++;
342
343 igbvf_rx_checksum_adv(adapter, staterr, skb);
344
345 skb->protocol = eth_type_trans(skb, netdev);
346
347 igbvf_receive_skb(adapter, netdev, skb, staterr,
348 rx_desc->wb.upper.vlan);
349
350 next_desc:
351 rx_desc->wb.upper.status_error = 0;
352
353 /* return some buffers to hardware, one at a time is too slow */
354 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
355 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
356 cleaned_count = 0;
357 }
358
359 /* use prefetched values */
360 rx_desc = next_rxd;
361 buffer_info = next_buffer;
362
363 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
364 }
365
366 rx_ring->next_to_clean = i;
367 cleaned_count = igbvf_desc_unused(rx_ring);
368
369 if (cleaned_count)
370 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
371
372 adapter->total_rx_packets += total_packets;
373 adapter->total_rx_bytes += total_bytes;
374 adapter->net_stats.rx_bytes += total_bytes;
375 adapter->net_stats.rx_packets += total_packets;
376 return cleaned;
377 }
378
igbvf_put_txbuf(struct igbvf_adapter * adapter,struct igbvf_buffer * buffer_info)379 static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
380 struct igbvf_buffer *buffer_info)
381 {
382 if (buffer_info->dma) {
383 if (buffer_info->mapped_as_page)
384 dma_unmap_page(&adapter->pdev->dev,
385 buffer_info->dma,
386 buffer_info->length,
387 DMA_TO_DEVICE);
388 else
389 dma_unmap_single(&adapter->pdev->dev,
390 buffer_info->dma,
391 buffer_info->length,
392 DMA_TO_DEVICE);
393 buffer_info->dma = 0;
394 }
395 if (buffer_info->skb) {
396 dev_kfree_skb_any(buffer_info->skb);
397 buffer_info->skb = NULL;
398 }
399 buffer_info->time_stamp = 0;
400 }
401
402 /**
403 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
404 * @adapter: board private structure
405 *
406 * Return 0 on success, negative on failure
407 **/
igbvf_setup_tx_resources(struct igbvf_adapter * adapter,struct igbvf_ring * tx_ring)408 int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
409 struct igbvf_ring *tx_ring)
410 {
411 struct pci_dev *pdev = adapter->pdev;
412 int size;
413
414 size = sizeof(struct igbvf_buffer) * tx_ring->count;
415 tx_ring->buffer_info = vzalloc(size);
416 if (!tx_ring->buffer_info)
417 goto err;
418
419 /* round up to nearest 4K */
420 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
421 tx_ring->size = ALIGN(tx_ring->size, 4096);
422
423 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
424 &tx_ring->dma, GFP_KERNEL);
425
426 if (!tx_ring->desc)
427 goto err;
428
429 tx_ring->adapter = adapter;
430 tx_ring->next_to_use = 0;
431 tx_ring->next_to_clean = 0;
432
433 return 0;
434 err:
435 vfree(tx_ring->buffer_info);
436 dev_err(&adapter->pdev->dev,
437 "Unable to allocate memory for the transmit descriptor ring\n");
438 return -ENOMEM;
439 }
440
441 /**
442 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
443 * @adapter: board private structure
444 *
445 * Returns 0 on success, negative on failure
446 **/
igbvf_setup_rx_resources(struct igbvf_adapter * adapter,struct igbvf_ring * rx_ring)447 int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
448 struct igbvf_ring *rx_ring)
449 {
450 struct pci_dev *pdev = adapter->pdev;
451 int size, desc_len;
452
453 size = sizeof(struct igbvf_buffer) * rx_ring->count;
454 rx_ring->buffer_info = vzalloc(size);
455 if (!rx_ring->buffer_info)
456 goto err;
457
458 desc_len = sizeof(union e1000_adv_rx_desc);
459
460 /* Round up to nearest 4K */
461 rx_ring->size = rx_ring->count * desc_len;
462 rx_ring->size = ALIGN(rx_ring->size, 4096);
463
464 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
465 &rx_ring->dma, GFP_KERNEL);
466
467 if (!rx_ring->desc)
468 goto err;
469
470 rx_ring->next_to_clean = 0;
471 rx_ring->next_to_use = 0;
472
473 rx_ring->adapter = adapter;
474
475 return 0;
476
477 err:
478 vfree(rx_ring->buffer_info);
479 rx_ring->buffer_info = NULL;
480 dev_err(&adapter->pdev->dev,
481 "Unable to allocate memory for the receive descriptor ring\n");
482 return -ENOMEM;
483 }
484
485 /**
486 * igbvf_clean_tx_ring - Free Tx Buffers
487 * @tx_ring: ring to be cleaned
488 **/
igbvf_clean_tx_ring(struct igbvf_ring * tx_ring)489 static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
490 {
491 struct igbvf_adapter *adapter = tx_ring->adapter;
492 struct igbvf_buffer *buffer_info;
493 unsigned long size;
494 unsigned int i;
495
496 if (!tx_ring->buffer_info)
497 return;
498
499 /* Free all the Tx ring sk_buffs */
500 for (i = 0; i < tx_ring->count; i++) {
501 buffer_info = &tx_ring->buffer_info[i];
502 igbvf_put_txbuf(adapter, buffer_info);
503 }
504
505 size = sizeof(struct igbvf_buffer) * tx_ring->count;
506 memset(tx_ring->buffer_info, 0, size);
507
508 /* Zero out the descriptor ring */
509 memset(tx_ring->desc, 0, tx_ring->size);
510
511 tx_ring->next_to_use = 0;
512 tx_ring->next_to_clean = 0;
513
514 writel(0, adapter->hw.hw_addr + tx_ring->head);
515 writel(0, adapter->hw.hw_addr + tx_ring->tail);
516 }
517
518 /**
519 * igbvf_free_tx_resources - Free Tx Resources per Queue
520 * @tx_ring: ring to free resources from
521 *
522 * Free all transmit software resources
523 **/
igbvf_free_tx_resources(struct igbvf_ring * tx_ring)524 void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
525 {
526 struct pci_dev *pdev = tx_ring->adapter->pdev;
527
528 igbvf_clean_tx_ring(tx_ring);
529
530 vfree(tx_ring->buffer_info);
531 tx_ring->buffer_info = NULL;
532
533 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
534 tx_ring->dma);
535
536 tx_ring->desc = NULL;
537 }
538
539 /**
540 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
541 * @adapter: board private structure
542 **/
igbvf_clean_rx_ring(struct igbvf_ring * rx_ring)543 static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
544 {
545 struct igbvf_adapter *adapter = rx_ring->adapter;
546 struct igbvf_buffer *buffer_info;
547 struct pci_dev *pdev = adapter->pdev;
548 unsigned long size;
549 unsigned int i;
550
551 if (!rx_ring->buffer_info)
552 return;
553
554 /* Free all the Rx ring sk_buffs */
555 for (i = 0; i < rx_ring->count; i++) {
556 buffer_info = &rx_ring->buffer_info[i];
557 if (buffer_info->dma) {
558 if (adapter->rx_ps_hdr_size){
559 dma_unmap_single(&pdev->dev, buffer_info->dma,
560 adapter->rx_ps_hdr_size,
561 DMA_FROM_DEVICE);
562 } else {
563 dma_unmap_single(&pdev->dev, buffer_info->dma,
564 adapter->rx_buffer_len,
565 DMA_FROM_DEVICE);
566 }
567 buffer_info->dma = 0;
568 }
569
570 if (buffer_info->skb) {
571 dev_kfree_skb(buffer_info->skb);
572 buffer_info->skb = NULL;
573 }
574
575 if (buffer_info->page) {
576 if (buffer_info->page_dma)
577 dma_unmap_page(&pdev->dev,
578 buffer_info->page_dma,
579 PAGE_SIZE / 2,
580 DMA_FROM_DEVICE);
581 put_page(buffer_info->page);
582 buffer_info->page = NULL;
583 buffer_info->page_dma = 0;
584 buffer_info->page_offset = 0;
585 }
586 }
587
588 size = sizeof(struct igbvf_buffer) * rx_ring->count;
589 memset(rx_ring->buffer_info, 0, size);
590
591 /* Zero out the descriptor ring */
592 memset(rx_ring->desc, 0, rx_ring->size);
593
594 rx_ring->next_to_clean = 0;
595 rx_ring->next_to_use = 0;
596
597 writel(0, adapter->hw.hw_addr + rx_ring->head);
598 writel(0, adapter->hw.hw_addr + rx_ring->tail);
599 }
600
601 /**
602 * igbvf_free_rx_resources - Free Rx Resources
603 * @rx_ring: ring to clean the resources from
604 *
605 * Free all receive software resources
606 **/
607
igbvf_free_rx_resources(struct igbvf_ring * rx_ring)608 void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
609 {
610 struct pci_dev *pdev = rx_ring->adapter->pdev;
611
612 igbvf_clean_rx_ring(rx_ring);
613
614 vfree(rx_ring->buffer_info);
615 rx_ring->buffer_info = NULL;
616
617 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
618 rx_ring->dma);
619 rx_ring->desc = NULL;
620 }
621
622 /**
623 * igbvf_update_itr - update the dynamic ITR value based on statistics
624 * @adapter: pointer to adapter
625 * @itr_setting: current adapter->itr
626 * @packets: the number of packets during this measurement interval
627 * @bytes: the number of bytes during this measurement interval
628 *
629 * Stores a new ITR value based on packets and byte
630 * counts during the last interrupt. The advantage of per interrupt
631 * computation is faster updates and more accurate ITR for the current
632 * traffic pattern. Constants in this function were computed
633 * based on theoretical maximum wire speed and thresholds were set based
634 * on testing data as well as attempting to minimize response time
635 * while increasing bulk throughput. This functionality is controlled
636 * by the InterruptThrottleRate module parameter.
637 **/
igbvf_update_itr(struct igbvf_adapter * adapter,u16 itr_setting,int packets,int bytes)638 static unsigned int igbvf_update_itr(struct igbvf_adapter *adapter,
639 u16 itr_setting, int packets,
640 int bytes)
641 {
642 unsigned int 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 }
679
680 update_itr_done:
681 return retval;
682 }
683
igbvf_set_itr(struct igbvf_adapter * adapter)684 static void igbvf_set_itr(struct igbvf_adapter *adapter)
685 {
686 struct e1000_hw *hw = &adapter->hw;
687 u16 current_itr;
688 u32 new_itr = adapter->itr;
689
690 adapter->tx_itr = igbvf_update_itr(adapter, adapter->tx_itr,
691 adapter->total_tx_packets,
692 adapter->total_tx_bytes);
693 /* conservative mode (itr 3) eliminates the lowest_latency setting */
694 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
695 adapter->tx_itr = low_latency;
696
697 adapter->rx_itr = igbvf_update_itr(adapter, adapter->rx_itr,
698 adapter->total_rx_packets,
699 adapter->total_rx_bytes);
700 /* conservative mode (itr 3) eliminates the lowest_latency setting */
701 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
702 adapter->rx_itr = low_latency;
703
704 current_itr = max(adapter->rx_itr, adapter->tx_itr);
705
706 switch (current_itr) {
707 /* counts and packets in update_itr are dependent on these numbers */
708 case lowest_latency:
709 new_itr = 70000;
710 break;
711 case low_latency:
712 new_itr = 20000; /* aka hwitr = ~200 */
713 break;
714 case bulk_latency:
715 new_itr = 4000;
716 break;
717 default:
718 break;
719 }
720
721 if (new_itr != adapter->itr) {
722 /*
723 * this attempts to bias the interrupt rate towards Bulk
724 * by adding intermediate steps when interrupt rate is
725 * increasing
726 */
727 new_itr = new_itr > adapter->itr ?
728 min(adapter->itr + (new_itr >> 2), new_itr) :
729 new_itr;
730 adapter->itr = new_itr;
731 adapter->rx_ring->itr_val = 1952;
732
733 if (adapter->msix_entries)
734 adapter->rx_ring->set_itr = 1;
735 else
736 ew32(ITR, 1952);
737 }
738 }
739
740 /**
741 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
742 * @adapter: board private structure
743 * returns true if ring is completely cleaned
744 **/
igbvf_clean_tx_irq(struct igbvf_ring * tx_ring)745 static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
746 {
747 struct igbvf_adapter *adapter = tx_ring->adapter;
748 struct net_device *netdev = adapter->netdev;
749 struct igbvf_buffer *buffer_info;
750 struct sk_buff *skb;
751 union e1000_adv_tx_desc *tx_desc, *eop_desc;
752 unsigned int total_bytes = 0, total_packets = 0;
753 unsigned int i, eop, count = 0;
754 bool cleaned = false;
755
756 i = tx_ring->next_to_clean;
757 eop = tx_ring->buffer_info[i].next_to_watch;
758 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
759
760 while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
761 (count < tx_ring->count)) {
762 rmb(); /* read buffer_info after eop_desc status */
763 for (cleaned = false; !cleaned; count++) {
764 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
765 buffer_info = &tx_ring->buffer_info[i];
766 cleaned = (i == eop);
767 skb = buffer_info->skb;
768
769 if (skb) {
770 unsigned int segs, bytecount;
771
772 /* gso_segs is currently only valid for tcp */
773 segs = skb_shinfo(skb)->gso_segs ?: 1;
774 /* multiply data chunks by size of headers */
775 bytecount = ((segs - 1) * skb_headlen(skb)) +
776 skb->len;
777 total_packets += segs;
778 total_bytes += bytecount;
779 }
780
781 igbvf_put_txbuf(adapter, buffer_info);
782 tx_desc->wb.status = 0;
783
784 i++;
785 if (i == tx_ring->count)
786 i = 0;
787 }
788 eop = tx_ring->buffer_info[i].next_to_watch;
789 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
790 }
791
792 tx_ring->next_to_clean = i;
793
794 if (unlikely(count &&
795 netif_carrier_ok(netdev) &&
796 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
797 /* Make sure that anybody stopping the queue after this
798 * sees the new next_to_clean.
799 */
800 smp_mb();
801 if (netif_queue_stopped(netdev) &&
802 !(test_bit(__IGBVF_DOWN, &adapter->state))) {
803 netif_wake_queue(netdev);
804 ++adapter->restart_queue;
805 }
806 }
807
808 adapter->net_stats.tx_bytes += total_bytes;
809 adapter->net_stats.tx_packets += total_packets;
810 return count < tx_ring->count;
811 }
812
igbvf_msix_other(int irq,void * data)813 static irqreturn_t igbvf_msix_other(int irq, void *data)
814 {
815 struct net_device *netdev = data;
816 struct igbvf_adapter *adapter = netdev_priv(netdev);
817 struct e1000_hw *hw = &adapter->hw;
818
819 adapter->int_counter1++;
820
821 netif_carrier_off(netdev);
822 hw->mac.get_link_status = 1;
823 if (!test_bit(__IGBVF_DOWN, &adapter->state))
824 mod_timer(&adapter->watchdog_timer, jiffies + 1);
825
826 ew32(EIMS, adapter->eims_other);
827
828 return IRQ_HANDLED;
829 }
830
igbvf_intr_msix_tx(int irq,void * data)831 static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
832 {
833 struct net_device *netdev = data;
834 struct igbvf_adapter *adapter = netdev_priv(netdev);
835 struct e1000_hw *hw = &adapter->hw;
836 struct igbvf_ring *tx_ring = adapter->tx_ring;
837
838
839 adapter->total_tx_bytes = 0;
840 adapter->total_tx_packets = 0;
841
842 /* auto mask will automatically reenable the interrupt when we write
843 * EICS */
844 if (!igbvf_clean_tx_irq(tx_ring))
845 /* Ring was not completely cleaned, so fire another interrupt */
846 ew32(EICS, tx_ring->eims_value);
847 else
848 ew32(EIMS, tx_ring->eims_value);
849
850 return IRQ_HANDLED;
851 }
852
igbvf_intr_msix_rx(int irq,void * data)853 static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
854 {
855 struct net_device *netdev = data;
856 struct igbvf_adapter *adapter = netdev_priv(netdev);
857
858 adapter->int_counter0++;
859
860 /* Write the ITR value calculated at the end of the
861 * previous interrupt.
862 */
863 if (adapter->rx_ring->set_itr) {
864 writel(adapter->rx_ring->itr_val,
865 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
866 adapter->rx_ring->set_itr = 0;
867 }
868
869 if (napi_schedule_prep(&adapter->rx_ring->napi)) {
870 adapter->total_rx_bytes = 0;
871 adapter->total_rx_packets = 0;
872 __napi_schedule(&adapter->rx_ring->napi);
873 }
874
875 return IRQ_HANDLED;
876 }
877
878 #define IGBVF_NO_QUEUE -1
879
igbvf_assign_vector(struct igbvf_adapter * adapter,int rx_queue,int tx_queue,int msix_vector)880 static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
881 int tx_queue, int msix_vector)
882 {
883 struct e1000_hw *hw = &adapter->hw;
884 u32 ivar, index;
885
886 /* 82576 uses a table-based method for assigning vectors.
887 Each queue has a single entry in the table to which we write
888 a vector number along with a "valid" bit. Sadly, the layout
889 of the table is somewhat counterintuitive. */
890 if (rx_queue > IGBVF_NO_QUEUE) {
891 index = (rx_queue >> 1);
892 ivar = array_er32(IVAR0, index);
893 if (rx_queue & 0x1) {
894 /* vector goes into third byte of register */
895 ivar = ivar & 0xFF00FFFF;
896 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
897 } else {
898 /* vector goes into low byte of register */
899 ivar = ivar & 0xFFFFFF00;
900 ivar |= msix_vector | E1000_IVAR_VALID;
901 }
902 adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector;
903 array_ew32(IVAR0, index, ivar);
904 }
905 if (tx_queue > IGBVF_NO_QUEUE) {
906 index = (tx_queue >> 1);
907 ivar = array_er32(IVAR0, index);
908 if (tx_queue & 0x1) {
909 /* vector goes into high byte of register */
910 ivar = ivar & 0x00FFFFFF;
911 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
912 } else {
913 /* vector goes into second byte of register */
914 ivar = ivar & 0xFFFF00FF;
915 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
916 }
917 adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector;
918 array_ew32(IVAR0, index, ivar);
919 }
920 }
921
922 /**
923 * igbvf_configure_msix - Configure MSI-X hardware
924 *
925 * igbvf_configure_msix sets up the hardware to properly
926 * generate MSI-X interrupts.
927 **/
igbvf_configure_msix(struct igbvf_adapter * adapter)928 static void igbvf_configure_msix(struct igbvf_adapter *adapter)
929 {
930 u32 tmp;
931 struct e1000_hw *hw = &adapter->hw;
932 struct igbvf_ring *tx_ring = adapter->tx_ring;
933 struct igbvf_ring *rx_ring = adapter->rx_ring;
934 int vector = 0;
935
936 adapter->eims_enable_mask = 0;
937
938 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
939 adapter->eims_enable_mask |= tx_ring->eims_value;
940 if (tx_ring->itr_val)
941 writel(tx_ring->itr_val,
942 hw->hw_addr + tx_ring->itr_register);
943 else
944 writel(1952, hw->hw_addr + tx_ring->itr_register);
945
946 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
947 adapter->eims_enable_mask |= rx_ring->eims_value;
948 if (rx_ring->itr_val)
949 writel(rx_ring->itr_val,
950 hw->hw_addr + rx_ring->itr_register);
951 else
952 writel(1952, hw->hw_addr + rx_ring->itr_register);
953
954 /* set vector for other causes, i.e. link changes */
955
956 tmp = (vector++ | E1000_IVAR_VALID);
957
958 ew32(IVAR_MISC, tmp);
959
960 adapter->eims_enable_mask = (1 << (vector)) - 1;
961 adapter->eims_other = 1 << (vector - 1);
962 e1e_flush();
963 }
964
igbvf_reset_interrupt_capability(struct igbvf_adapter * adapter)965 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
966 {
967 if (adapter->msix_entries) {
968 pci_disable_msix(adapter->pdev);
969 kfree(adapter->msix_entries);
970 adapter->msix_entries = NULL;
971 }
972 }
973
974 /**
975 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
976 *
977 * Attempt to configure interrupts using the best available
978 * capabilities of the hardware and kernel.
979 **/
igbvf_set_interrupt_capability(struct igbvf_adapter * adapter)980 static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
981 {
982 int err = -ENOMEM;
983 int i;
984
985 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
986 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
987 GFP_KERNEL);
988 if (adapter->msix_entries) {
989 for (i = 0; i < 3; i++)
990 adapter->msix_entries[i].entry = i;
991
992 err = pci_enable_msix(adapter->pdev,
993 adapter->msix_entries, 3);
994 }
995
996 if (err) {
997 /* MSI-X failed */
998 dev_err(&adapter->pdev->dev,
999 "Failed to initialize MSI-X interrupts.\n");
1000 igbvf_reset_interrupt_capability(adapter);
1001 }
1002 }
1003
1004 /**
1005 * igbvf_request_msix - Initialize MSI-X interrupts
1006 *
1007 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1008 * kernel.
1009 **/
igbvf_request_msix(struct igbvf_adapter * adapter)1010 static int igbvf_request_msix(struct igbvf_adapter *adapter)
1011 {
1012 struct net_device *netdev = adapter->netdev;
1013 int err = 0, vector = 0;
1014
1015 if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1016 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1017 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1018 } else {
1019 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1020 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1021 }
1022
1023 err = request_irq(adapter->msix_entries[vector].vector,
1024 igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1025 netdev);
1026 if (err)
1027 goto out;
1028
1029 adapter->tx_ring->itr_register = E1000_EITR(vector);
1030 adapter->tx_ring->itr_val = 1952;
1031 vector++;
1032
1033 err = request_irq(adapter->msix_entries[vector].vector,
1034 igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1035 netdev);
1036 if (err)
1037 goto out;
1038
1039 adapter->rx_ring->itr_register = E1000_EITR(vector);
1040 adapter->rx_ring->itr_val = 1952;
1041 vector++;
1042
1043 err = request_irq(adapter->msix_entries[vector].vector,
1044 igbvf_msix_other, 0, netdev->name, netdev);
1045 if (err)
1046 goto out;
1047
1048 igbvf_configure_msix(adapter);
1049 return 0;
1050 out:
1051 return err;
1052 }
1053
1054 /**
1055 * igbvf_alloc_queues - Allocate memory for all rings
1056 * @adapter: board private structure to initialize
1057 **/
igbvf_alloc_queues(struct igbvf_adapter * adapter)1058 static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter)
1059 {
1060 struct net_device *netdev = adapter->netdev;
1061
1062 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1063 if (!adapter->tx_ring)
1064 return -ENOMEM;
1065
1066 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1067 if (!adapter->rx_ring) {
1068 kfree(adapter->tx_ring);
1069 return -ENOMEM;
1070 }
1071
1072 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1073
1074 return 0;
1075 }
1076
1077 /**
1078 * igbvf_request_irq - initialize interrupts
1079 *
1080 * Attempts to configure interrupts using the best available
1081 * capabilities of the hardware and kernel.
1082 **/
igbvf_request_irq(struct igbvf_adapter * adapter)1083 static int igbvf_request_irq(struct igbvf_adapter *adapter)
1084 {
1085 int err = -1;
1086
1087 /* igbvf supports msi-x only */
1088 if (adapter->msix_entries)
1089 err = igbvf_request_msix(adapter);
1090
1091 if (!err)
1092 return err;
1093
1094 dev_err(&adapter->pdev->dev,
1095 "Unable to allocate interrupt, Error: %d\n", err);
1096
1097 return err;
1098 }
1099
igbvf_free_irq(struct igbvf_adapter * adapter)1100 static void igbvf_free_irq(struct igbvf_adapter *adapter)
1101 {
1102 struct net_device *netdev = adapter->netdev;
1103 int vector;
1104
1105 if (adapter->msix_entries) {
1106 for (vector = 0; vector < 3; vector++)
1107 free_irq(adapter->msix_entries[vector].vector, netdev);
1108 }
1109 }
1110
1111 /**
1112 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1113 **/
igbvf_irq_disable(struct igbvf_adapter * adapter)1114 static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1115 {
1116 struct e1000_hw *hw = &adapter->hw;
1117
1118 ew32(EIMC, ~0);
1119
1120 if (adapter->msix_entries)
1121 ew32(EIAC, 0);
1122 }
1123
1124 /**
1125 * igbvf_irq_enable - Enable default interrupt generation settings
1126 **/
igbvf_irq_enable(struct igbvf_adapter * adapter)1127 static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1128 {
1129 struct e1000_hw *hw = &adapter->hw;
1130
1131 ew32(EIAC, adapter->eims_enable_mask);
1132 ew32(EIAM, adapter->eims_enable_mask);
1133 ew32(EIMS, adapter->eims_enable_mask);
1134 }
1135
1136 /**
1137 * igbvf_poll - NAPI Rx polling callback
1138 * @napi: struct associated with this polling callback
1139 * @budget: amount of packets driver is allowed to process this poll
1140 **/
igbvf_poll(struct napi_struct * napi,int budget)1141 static int igbvf_poll(struct napi_struct *napi, int budget)
1142 {
1143 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1144 struct igbvf_adapter *adapter = rx_ring->adapter;
1145 struct e1000_hw *hw = &adapter->hw;
1146 int work_done = 0;
1147
1148 igbvf_clean_rx_irq(adapter, &work_done, budget);
1149
1150 /* If not enough Rx work done, exit the polling mode */
1151 if (work_done < budget) {
1152 napi_complete(napi);
1153
1154 if (adapter->itr_setting & 3)
1155 igbvf_set_itr(adapter);
1156
1157 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1158 ew32(EIMS, adapter->rx_ring->eims_value);
1159 }
1160
1161 return work_done;
1162 }
1163
1164 /**
1165 * igbvf_set_rlpml - set receive large packet maximum length
1166 * @adapter: board private structure
1167 *
1168 * Configure the maximum size of packets that will be received
1169 */
igbvf_set_rlpml(struct igbvf_adapter * adapter)1170 static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1171 {
1172 int max_frame_size;
1173 struct e1000_hw *hw = &adapter->hw;
1174
1175 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
1176 e1000_rlpml_set_vf(hw, max_frame_size);
1177 }
1178
igbvf_vlan_rx_add_vid(struct net_device * netdev,u16 vid)1179 static int igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1180 {
1181 struct igbvf_adapter *adapter = netdev_priv(netdev);
1182 struct e1000_hw *hw = &adapter->hw;
1183
1184 if (hw->mac.ops.set_vfta(hw, vid, true)) {
1185 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
1186 return -EINVAL;
1187 }
1188 set_bit(vid, adapter->active_vlans);
1189 return 0;
1190 }
1191
igbvf_vlan_rx_kill_vid(struct net_device * netdev,u16 vid)1192 static int igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1193 {
1194 struct igbvf_adapter *adapter = netdev_priv(netdev);
1195 struct e1000_hw *hw = &adapter->hw;
1196
1197 if (hw->mac.ops.set_vfta(hw, vid, false)) {
1198 dev_err(&adapter->pdev->dev,
1199 "Failed to remove vlan id %d\n", vid);
1200 return -EINVAL;
1201 }
1202 clear_bit(vid, adapter->active_vlans);
1203 return 0;
1204 }
1205
igbvf_restore_vlan(struct igbvf_adapter * adapter)1206 static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1207 {
1208 u16 vid;
1209
1210 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1211 igbvf_vlan_rx_add_vid(adapter->netdev, vid);
1212 }
1213
1214 /**
1215 * igbvf_configure_tx - Configure Transmit Unit after Reset
1216 * @adapter: board private structure
1217 *
1218 * Configure the Tx unit of the MAC after a reset.
1219 **/
igbvf_configure_tx(struct igbvf_adapter * adapter)1220 static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1221 {
1222 struct e1000_hw *hw = &adapter->hw;
1223 struct igbvf_ring *tx_ring = adapter->tx_ring;
1224 u64 tdba;
1225 u32 txdctl, dca_txctrl;
1226
1227 /* disable transmits */
1228 txdctl = er32(TXDCTL(0));
1229 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1230 e1e_flush();
1231 msleep(10);
1232
1233 /* Setup the HW Tx Head and Tail descriptor pointers */
1234 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1235 tdba = tx_ring->dma;
1236 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1237 ew32(TDBAH(0), (tdba >> 32));
1238 ew32(TDH(0), 0);
1239 ew32(TDT(0), 0);
1240 tx_ring->head = E1000_TDH(0);
1241 tx_ring->tail = E1000_TDT(0);
1242
1243 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1244 * MUST be delivered in order or it will completely screw up
1245 * our bookeeping.
1246 */
1247 dca_txctrl = er32(DCA_TXCTRL(0));
1248 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1249 ew32(DCA_TXCTRL(0), dca_txctrl);
1250
1251 /* enable transmits */
1252 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1253 ew32(TXDCTL(0), txdctl);
1254
1255 /* Setup Transmit Descriptor Settings for eop descriptor */
1256 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1257
1258 /* enable Report Status bit */
1259 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1260 }
1261
1262 /**
1263 * igbvf_setup_srrctl - configure the receive control registers
1264 * @adapter: Board private structure
1265 **/
igbvf_setup_srrctl(struct igbvf_adapter * adapter)1266 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1267 {
1268 struct e1000_hw *hw = &adapter->hw;
1269 u32 srrctl = 0;
1270
1271 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1272 E1000_SRRCTL_BSIZEHDR_MASK |
1273 E1000_SRRCTL_BSIZEPKT_MASK);
1274
1275 /* Enable queue drop to avoid head of line blocking */
1276 srrctl |= E1000_SRRCTL_DROP_EN;
1277
1278 /* Setup buffer sizes */
1279 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1280 E1000_SRRCTL_BSIZEPKT_SHIFT;
1281
1282 if (adapter->rx_buffer_len < 2048) {
1283 adapter->rx_ps_hdr_size = 0;
1284 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1285 } else {
1286 adapter->rx_ps_hdr_size = 128;
1287 srrctl |= adapter->rx_ps_hdr_size <<
1288 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1289 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1290 }
1291
1292 ew32(SRRCTL(0), srrctl);
1293 }
1294
1295 /**
1296 * igbvf_configure_rx - Configure Receive Unit after Reset
1297 * @adapter: board private structure
1298 *
1299 * Configure the Rx unit of the MAC after a reset.
1300 **/
igbvf_configure_rx(struct igbvf_adapter * adapter)1301 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1302 {
1303 struct e1000_hw *hw = &adapter->hw;
1304 struct igbvf_ring *rx_ring = adapter->rx_ring;
1305 u64 rdba;
1306 u32 rdlen, rxdctl;
1307
1308 /* disable receives */
1309 rxdctl = er32(RXDCTL(0));
1310 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1311 e1e_flush();
1312 msleep(10);
1313
1314 rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc);
1315
1316 /*
1317 * Setup the HW Rx Head and Tail Descriptor Pointers and
1318 * the Base and Length of the Rx Descriptor Ring
1319 */
1320 rdba = rx_ring->dma;
1321 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1322 ew32(RDBAH(0), (rdba >> 32));
1323 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1324 rx_ring->head = E1000_RDH(0);
1325 rx_ring->tail = E1000_RDT(0);
1326 ew32(RDH(0), 0);
1327 ew32(RDT(0), 0);
1328
1329 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1330 rxdctl &= 0xFFF00000;
1331 rxdctl |= IGBVF_RX_PTHRESH;
1332 rxdctl |= IGBVF_RX_HTHRESH << 8;
1333 rxdctl |= IGBVF_RX_WTHRESH << 16;
1334
1335 igbvf_set_rlpml(adapter);
1336
1337 /* enable receives */
1338 ew32(RXDCTL(0), rxdctl);
1339 }
1340
1341 /**
1342 * igbvf_set_multi - Multicast and Promiscuous mode set
1343 * @netdev: network interface device structure
1344 *
1345 * The set_multi entry point is called whenever the multicast address
1346 * list or the network interface flags are updated. This routine is
1347 * responsible for configuring the hardware for proper multicast,
1348 * promiscuous mode, and all-multi behavior.
1349 **/
igbvf_set_multi(struct net_device * netdev)1350 static void igbvf_set_multi(struct net_device *netdev)
1351 {
1352 struct igbvf_adapter *adapter = netdev_priv(netdev);
1353 struct e1000_hw *hw = &adapter->hw;
1354 struct netdev_hw_addr *ha;
1355 u8 *mta_list = NULL;
1356 int i;
1357
1358 if (!netdev_mc_empty(netdev)) {
1359 mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
1360 if (!mta_list) {
1361 dev_err(&adapter->pdev->dev,
1362 "failed to allocate multicast filter list\n");
1363 return;
1364 }
1365 }
1366
1367 /* prepare a packed array of only addresses. */
1368 i = 0;
1369 netdev_for_each_mc_addr(ha, netdev)
1370 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
1371
1372 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1373 kfree(mta_list);
1374 }
1375
1376 /**
1377 * igbvf_configure - configure the hardware for Rx and Tx
1378 * @adapter: private board structure
1379 **/
igbvf_configure(struct igbvf_adapter * adapter)1380 static void igbvf_configure(struct igbvf_adapter *adapter)
1381 {
1382 igbvf_set_multi(adapter->netdev);
1383
1384 igbvf_restore_vlan(adapter);
1385
1386 igbvf_configure_tx(adapter);
1387 igbvf_setup_srrctl(adapter);
1388 igbvf_configure_rx(adapter);
1389 igbvf_alloc_rx_buffers(adapter->rx_ring,
1390 igbvf_desc_unused(adapter->rx_ring));
1391 }
1392
1393 /* igbvf_reset - bring the hardware into a known good state
1394 *
1395 * This function boots the hardware and enables some settings that
1396 * require a configuration cycle of the hardware - those cannot be
1397 * set/changed during runtime. After reset the device needs to be
1398 * properly configured for Rx, Tx etc.
1399 */
igbvf_reset(struct igbvf_adapter * adapter)1400 static void igbvf_reset(struct igbvf_adapter *adapter)
1401 {
1402 struct e1000_mac_info *mac = &adapter->hw.mac;
1403 struct net_device *netdev = adapter->netdev;
1404 struct e1000_hw *hw = &adapter->hw;
1405
1406 /* Allow time for pending master requests to run */
1407 if (mac->ops.reset_hw(hw))
1408 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1409
1410 mac->ops.init_hw(hw);
1411
1412 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1413 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1414 netdev->addr_len);
1415 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1416 netdev->addr_len);
1417 }
1418
1419 adapter->last_reset = jiffies;
1420 }
1421
igbvf_up(struct igbvf_adapter * adapter)1422 int igbvf_up(struct igbvf_adapter *adapter)
1423 {
1424 struct e1000_hw *hw = &adapter->hw;
1425
1426 /* hardware has been reset, we need to reload some things */
1427 igbvf_configure(adapter);
1428
1429 clear_bit(__IGBVF_DOWN, &adapter->state);
1430
1431 napi_enable(&adapter->rx_ring->napi);
1432 if (adapter->msix_entries)
1433 igbvf_configure_msix(adapter);
1434
1435 /* Clear any pending interrupts. */
1436 er32(EICR);
1437 igbvf_irq_enable(adapter);
1438
1439 /* start the watchdog */
1440 hw->mac.get_link_status = 1;
1441 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1442
1443
1444 return 0;
1445 }
1446
igbvf_down(struct igbvf_adapter * adapter)1447 void igbvf_down(struct igbvf_adapter *adapter)
1448 {
1449 struct net_device *netdev = adapter->netdev;
1450 struct e1000_hw *hw = &adapter->hw;
1451 u32 rxdctl, txdctl;
1452
1453 /*
1454 * signal that we're down so the interrupt handler does not
1455 * reschedule our watchdog timer
1456 */
1457 set_bit(__IGBVF_DOWN, &adapter->state);
1458
1459 /* disable receives in the hardware */
1460 rxdctl = er32(RXDCTL(0));
1461 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1462
1463 netif_stop_queue(netdev);
1464
1465 /* disable transmits in the hardware */
1466 txdctl = er32(TXDCTL(0));
1467 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1468
1469 /* flush both disables and wait for them to finish */
1470 e1e_flush();
1471 msleep(10);
1472
1473 napi_disable(&adapter->rx_ring->napi);
1474
1475 igbvf_irq_disable(adapter);
1476
1477 del_timer_sync(&adapter->watchdog_timer);
1478
1479 netif_carrier_off(netdev);
1480
1481 /* record the stats before reset*/
1482 igbvf_update_stats(adapter);
1483
1484 adapter->link_speed = 0;
1485 adapter->link_duplex = 0;
1486
1487 igbvf_reset(adapter);
1488 igbvf_clean_tx_ring(adapter->tx_ring);
1489 igbvf_clean_rx_ring(adapter->rx_ring);
1490 }
1491
igbvf_reinit_locked(struct igbvf_adapter * adapter)1492 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1493 {
1494 might_sleep();
1495 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1496 msleep(1);
1497 igbvf_down(adapter);
1498 igbvf_up(adapter);
1499 clear_bit(__IGBVF_RESETTING, &adapter->state);
1500 }
1501
1502 /**
1503 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1504 * @adapter: board private structure to initialize
1505 *
1506 * igbvf_sw_init initializes the Adapter private data structure.
1507 * Fields are initialized based on PCI device information and
1508 * OS network device settings (MTU size).
1509 **/
igbvf_sw_init(struct igbvf_adapter * adapter)1510 static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter)
1511 {
1512 struct net_device *netdev = adapter->netdev;
1513 s32 rc;
1514
1515 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1516 adapter->rx_ps_hdr_size = 0;
1517 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1518 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1519
1520 adapter->tx_int_delay = 8;
1521 adapter->tx_abs_int_delay = 32;
1522 adapter->rx_int_delay = 0;
1523 adapter->rx_abs_int_delay = 8;
1524 adapter->itr_setting = 3;
1525 adapter->itr = 20000;
1526
1527 /* Set various function pointers */
1528 adapter->ei->init_ops(&adapter->hw);
1529
1530 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1531 if (rc)
1532 return rc;
1533
1534 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1535 if (rc)
1536 return rc;
1537
1538 igbvf_set_interrupt_capability(adapter);
1539
1540 if (igbvf_alloc_queues(adapter))
1541 return -ENOMEM;
1542
1543 spin_lock_init(&adapter->tx_queue_lock);
1544
1545 /* Explicitly disable IRQ since the NIC can be in any state. */
1546 igbvf_irq_disable(adapter);
1547
1548 spin_lock_init(&adapter->stats_lock);
1549
1550 set_bit(__IGBVF_DOWN, &adapter->state);
1551 return 0;
1552 }
1553
igbvf_initialize_last_counter_stats(struct igbvf_adapter * adapter)1554 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1555 {
1556 struct e1000_hw *hw = &adapter->hw;
1557
1558 adapter->stats.last_gprc = er32(VFGPRC);
1559 adapter->stats.last_gorc = er32(VFGORC);
1560 adapter->stats.last_gptc = er32(VFGPTC);
1561 adapter->stats.last_gotc = er32(VFGOTC);
1562 adapter->stats.last_mprc = er32(VFMPRC);
1563 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1564 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1565 adapter->stats.last_gorlbc = er32(VFGORLBC);
1566 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1567
1568 adapter->stats.base_gprc = er32(VFGPRC);
1569 adapter->stats.base_gorc = er32(VFGORC);
1570 adapter->stats.base_gptc = er32(VFGPTC);
1571 adapter->stats.base_gotc = er32(VFGOTC);
1572 adapter->stats.base_mprc = er32(VFMPRC);
1573 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1574 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1575 adapter->stats.base_gorlbc = er32(VFGORLBC);
1576 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1577 }
1578
1579 /**
1580 * igbvf_open - Called when a network interface is made active
1581 * @netdev: network interface device structure
1582 *
1583 * Returns 0 on success, negative value on failure
1584 *
1585 * The open entry point is called when a network interface is made
1586 * active by the system (IFF_UP). At this point all resources needed
1587 * for transmit and receive operations are allocated, the interrupt
1588 * handler is registered with the OS, the watchdog timer is started,
1589 * and the stack is notified that the interface is ready.
1590 **/
igbvf_open(struct net_device * netdev)1591 static int igbvf_open(struct net_device *netdev)
1592 {
1593 struct igbvf_adapter *adapter = netdev_priv(netdev);
1594 struct e1000_hw *hw = &adapter->hw;
1595 int err;
1596
1597 /* disallow open during test */
1598 if (test_bit(__IGBVF_TESTING, &adapter->state))
1599 return -EBUSY;
1600
1601 /* allocate transmit descriptors */
1602 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1603 if (err)
1604 goto err_setup_tx;
1605
1606 /* allocate receive descriptors */
1607 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1608 if (err)
1609 goto err_setup_rx;
1610
1611 /*
1612 * before we allocate an interrupt, we must be ready to handle it.
1613 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1614 * as soon as we call pci_request_irq, so we have to setup our
1615 * clean_rx handler before we do so.
1616 */
1617 igbvf_configure(adapter);
1618
1619 err = igbvf_request_irq(adapter);
1620 if (err)
1621 goto err_req_irq;
1622
1623 /* From here on the code is the same as igbvf_up() */
1624 clear_bit(__IGBVF_DOWN, &adapter->state);
1625
1626 napi_enable(&adapter->rx_ring->napi);
1627
1628 /* clear any pending interrupts */
1629 er32(EICR);
1630
1631 igbvf_irq_enable(adapter);
1632
1633 /* start the watchdog */
1634 hw->mac.get_link_status = 1;
1635 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1636
1637 return 0;
1638
1639 err_req_irq:
1640 igbvf_free_rx_resources(adapter->rx_ring);
1641 err_setup_rx:
1642 igbvf_free_tx_resources(adapter->tx_ring);
1643 err_setup_tx:
1644 igbvf_reset(adapter);
1645
1646 return err;
1647 }
1648
1649 /**
1650 * igbvf_close - Disables a network interface
1651 * @netdev: network interface device structure
1652 *
1653 * Returns 0, this is not allowed to fail
1654 *
1655 * The close entry point is called when an interface is de-activated
1656 * by the OS. The hardware is still under the drivers control, but
1657 * needs to be disabled. A global MAC reset is issued to stop the
1658 * hardware, and all transmit and receive resources are freed.
1659 **/
igbvf_close(struct net_device * netdev)1660 static int igbvf_close(struct net_device *netdev)
1661 {
1662 struct igbvf_adapter *adapter = netdev_priv(netdev);
1663
1664 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1665 igbvf_down(adapter);
1666
1667 igbvf_free_irq(adapter);
1668
1669 igbvf_free_tx_resources(adapter->tx_ring);
1670 igbvf_free_rx_resources(adapter->rx_ring);
1671
1672 return 0;
1673 }
1674 /**
1675 * igbvf_set_mac - Change the Ethernet Address of the NIC
1676 * @netdev: network interface device structure
1677 * @p: pointer to an address structure
1678 *
1679 * Returns 0 on success, negative on failure
1680 **/
igbvf_set_mac(struct net_device * netdev,void * p)1681 static int igbvf_set_mac(struct net_device *netdev, void *p)
1682 {
1683 struct igbvf_adapter *adapter = netdev_priv(netdev);
1684 struct e1000_hw *hw = &adapter->hw;
1685 struct sockaddr *addr = p;
1686
1687 if (!is_valid_ether_addr(addr->sa_data))
1688 return -EADDRNOTAVAIL;
1689
1690 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1691
1692 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1693
1694 if (memcmp(addr->sa_data, hw->mac.addr, 6))
1695 return -EADDRNOTAVAIL;
1696
1697 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1698
1699 return 0;
1700 }
1701
1702 #define UPDATE_VF_COUNTER(reg, name) \
1703 { \
1704 u32 current_counter = er32(reg); \
1705 if (current_counter < adapter->stats.last_##name) \
1706 adapter->stats.name += 0x100000000LL; \
1707 adapter->stats.last_##name = current_counter; \
1708 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1709 adapter->stats.name |= current_counter; \
1710 }
1711
1712 /**
1713 * igbvf_update_stats - Update the board statistics counters
1714 * @adapter: board private structure
1715 **/
igbvf_update_stats(struct igbvf_adapter * adapter)1716 void igbvf_update_stats(struct igbvf_adapter *adapter)
1717 {
1718 struct e1000_hw *hw = &adapter->hw;
1719 struct pci_dev *pdev = adapter->pdev;
1720
1721 /*
1722 * Prevent stats update while adapter is being reset, link is down
1723 * or if the pci connection is down.
1724 */
1725 if (adapter->link_speed == 0)
1726 return;
1727
1728 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1729 return;
1730
1731 if (pci_channel_offline(pdev))
1732 return;
1733
1734 UPDATE_VF_COUNTER(VFGPRC, gprc);
1735 UPDATE_VF_COUNTER(VFGORC, gorc);
1736 UPDATE_VF_COUNTER(VFGPTC, gptc);
1737 UPDATE_VF_COUNTER(VFGOTC, gotc);
1738 UPDATE_VF_COUNTER(VFMPRC, mprc);
1739 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1740 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1741 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1742 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1743
1744 /* Fill out the OS statistics structure */
1745 adapter->net_stats.multicast = adapter->stats.mprc;
1746 }
1747
igbvf_print_link_info(struct igbvf_adapter * adapter)1748 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1749 {
1750 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n",
1751 adapter->link_speed,
1752 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half");
1753 }
1754
igbvf_has_link(struct igbvf_adapter * adapter)1755 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1756 {
1757 struct e1000_hw *hw = &adapter->hw;
1758 s32 ret_val = E1000_SUCCESS;
1759 bool link_active;
1760
1761 /* If interface is down, stay link down */
1762 if (test_bit(__IGBVF_DOWN, &adapter->state))
1763 return false;
1764
1765 ret_val = hw->mac.ops.check_for_link(hw);
1766 link_active = !hw->mac.get_link_status;
1767
1768 /* if check for link returns error we will need to reset */
1769 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1770 schedule_work(&adapter->reset_task);
1771
1772 return link_active;
1773 }
1774
1775 /**
1776 * igbvf_watchdog - Timer Call-back
1777 * @data: pointer to adapter cast into an unsigned long
1778 **/
igbvf_watchdog(unsigned long data)1779 static void igbvf_watchdog(unsigned long data)
1780 {
1781 struct igbvf_adapter *adapter = (struct igbvf_adapter *) data;
1782
1783 /* Do the rest outside of interrupt context */
1784 schedule_work(&adapter->watchdog_task);
1785 }
1786
igbvf_watchdog_task(struct work_struct * work)1787 static void igbvf_watchdog_task(struct work_struct *work)
1788 {
1789 struct igbvf_adapter *adapter = container_of(work,
1790 struct igbvf_adapter,
1791 watchdog_task);
1792 struct net_device *netdev = adapter->netdev;
1793 struct e1000_mac_info *mac = &adapter->hw.mac;
1794 struct igbvf_ring *tx_ring = adapter->tx_ring;
1795 struct e1000_hw *hw = &adapter->hw;
1796 u32 link;
1797 int tx_pending = 0;
1798
1799 link = igbvf_has_link(adapter);
1800
1801 if (link) {
1802 if (!netif_carrier_ok(netdev)) {
1803 mac->ops.get_link_up_info(&adapter->hw,
1804 &adapter->link_speed,
1805 &adapter->link_duplex);
1806 igbvf_print_link_info(adapter);
1807
1808 netif_carrier_on(netdev);
1809 netif_wake_queue(netdev);
1810 }
1811 } else {
1812 if (netif_carrier_ok(netdev)) {
1813 adapter->link_speed = 0;
1814 adapter->link_duplex = 0;
1815 dev_info(&adapter->pdev->dev, "Link is Down\n");
1816 netif_carrier_off(netdev);
1817 netif_stop_queue(netdev);
1818 }
1819 }
1820
1821 if (netif_carrier_ok(netdev)) {
1822 igbvf_update_stats(adapter);
1823 } else {
1824 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1825 tx_ring->count);
1826 if (tx_pending) {
1827 /*
1828 * We've lost link, so the controller stops DMA,
1829 * but we've got queued Tx work that's never going
1830 * to get done, so reset controller to flush Tx.
1831 * (Do the reset outside of interrupt context).
1832 */
1833 adapter->tx_timeout_count++;
1834 schedule_work(&adapter->reset_task);
1835 }
1836 }
1837
1838 /* Cause software interrupt to ensure Rx ring is cleaned */
1839 ew32(EICS, adapter->rx_ring->eims_value);
1840
1841 /* Reset the timer */
1842 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1843 mod_timer(&adapter->watchdog_timer,
1844 round_jiffies(jiffies + (2 * HZ)));
1845 }
1846
1847 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1848 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1849 #define IGBVF_TX_FLAGS_TSO 0x00000004
1850 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1851 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1852 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1853
igbvf_tso(struct igbvf_adapter * adapter,struct igbvf_ring * tx_ring,struct sk_buff * skb,u32 tx_flags,u8 * hdr_len)1854 static int igbvf_tso(struct igbvf_adapter *adapter,
1855 struct igbvf_ring *tx_ring,
1856 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
1857 {
1858 struct e1000_adv_tx_context_desc *context_desc;
1859 unsigned int i;
1860 int err;
1861 struct igbvf_buffer *buffer_info;
1862 u32 info = 0, tu_cmd = 0;
1863 u32 mss_l4len_idx, l4len;
1864 *hdr_len = 0;
1865
1866 if (skb_header_cloned(skb)) {
1867 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1868 if (err) {
1869 dev_err(&adapter->pdev->dev,
1870 "igbvf_tso returning an error\n");
1871 return err;
1872 }
1873 }
1874
1875 l4len = tcp_hdrlen(skb);
1876 *hdr_len += l4len;
1877
1878 if (skb->protocol == htons(ETH_P_IP)) {
1879 struct iphdr *iph = ip_hdr(skb);
1880 iph->tot_len = 0;
1881 iph->check = 0;
1882 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1883 iph->daddr, 0,
1884 IPPROTO_TCP,
1885 0);
1886 } else if (skb_is_gso_v6(skb)) {
1887 ipv6_hdr(skb)->payload_len = 0;
1888 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
1889 &ipv6_hdr(skb)->daddr,
1890 0, IPPROTO_TCP, 0);
1891 }
1892
1893 i = tx_ring->next_to_use;
1894
1895 buffer_info = &tx_ring->buffer_info[i];
1896 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1897 /* VLAN MACLEN IPLEN */
1898 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1899 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1900 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1901 *hdr_len += skb_network_offset(skb);
1902 info |= (skb_transport_header(skb) - skb_network_header(skb));
1903 *hdr_len += (skb_transport_header(skb) - skb_network_header(skb));
1904 context_desc->vlan_macip_lens = cpu_to_le32(info);
1905
1906 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1907 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1908
1909 if (skb->protocol == htons(ETH_P_IP))
1910 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1911 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1912
1913 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1914
1915 /* MSS L4LEN IDX */
1916 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
1917 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
1918
1919 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1920 context_desc->seqnum_seed = 0;
1921
1922 buffer_info->time_stamp = jiffies;
1923 buffer_info->next_to_watch = i;
1924 buffer_info->dma = 0;
1925 i++;
1926 if (i == tx_ring->count)
1927 i = 0;
1928
1929 tx_ring->next_to_use = i;
1930
1931 return true;
1932 }
1933
igbvf_tx_csum(struct igbvf_adapter * adapter,struct igbvf_ring * tx_ring,struct sk_buff * skb,u32 tx_flags)1934 static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter,
1935 struct igbvf_ring *tx_ring,
1936 struct sk_buff *skb, u32 tx_flags)
1937 {
1938 struct e1000_adv_tx_context_desc *context_desc;
1939 unsigned int i;
1940 struct igbvf_buffer *buffer_info;
1941 u32 info = 0, tu_cmd = 0;
1942
1943 if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
1944 (tx_flags & IGBVF_TX_FLAGS_VLAN)) {
1945 i = tx_ring->next_to_use;
1946 buffer_info = &tx_ring->buffer_info[i];
1947 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1948
1949 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1950 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1951
1952 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1953 if (skb->ip_summed == CHECKSUM_PARTIAL)
1954 info |= (skb_transport_header(skb) -
1955 skb_network_header(skb));
1956
1957
1958 context_desc->vlan_macip_lens = cpu_to_le32(info);
1959
1960 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1961
1962 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1963 switch (skb->protocol) {
1964 case __constant_htons(ETH_P_IP):
1965 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1966 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1967 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1968 break;
1969 case __constant_htons(ETH_P_IPV6):
1970 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1971 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1972 break;
1973 default:
1974 break;
1975 }
1976 }
1977
1978 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1979 context_desc->seqnum_seed = 0;
1980 context_desc->mss_l4len_idx = 0;
1981
1982 buffer_info->time_stamp = jiffies;
1983 buffer_info->next_to_watch = i;
1984 buffer_info->dma = 0;
1985 i++;
1986 if (i == tx_ring->count)
1987 i = 0;
1988 tx_ring->next_to_use = i;
1989
1990 return true;
1991 }
1992
1993 return false;
1994 }
1995
igbvf_maybe_stop_tx(struct net_device * netdev,int size)1996 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
1997 {
1998 struct igbvf_adapter *adapter = netdev_priv(netdev);
1999
2000 /* there is enough descriptors then we don't need to worry */
2001 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2002 return 0;
2003
2004 netif_stop_queue(netdev);
2005
2006 smp_mb();
2007
2008 /* We need to check again just in case room has been made available */
2009 if (igbvf_desc_unused(adapter->tx_ring) < size)
2010 return -EBUSY;
2011
2012 netif_wake_queue(netdev);
2013
2014 ++adapter->restart_queue;
2015 return 0;
2016 }
2017
2018 #define IGBVF_MAX_TXD_PWR 16
2019 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2020
igbvf_tx_map_adv(struct igbvf_adapter * adapter,struct igbvf_ring * tx_ring,struct sk_buff * skb,unsigned int first)2021 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2022 struct igbvf_ring *tx_ring,
2023 struct sk_buff *skb,
2024 unsigned int first)
2025 {
2026 struct igbvf_buffer *buffer_info;
2027 struct pci_dev *pdev = adapter->pdev;
2028 unsigned int len = skb_headlen(skb);
2029 unsigned int count = 0, i;
2030 unsigned int f;
2031
2032 i = tx_ring->next_to_use;
2033
2034 buffer_info = &tx_ring->buffer_info[i];
2035 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2036 buffer_info->length = len;
2037 /* set time_stamp *before* dma to help avoid a possible race */
2038 buffer_info->time_stamp = jiffies;
2039 buffer_info->next_to_watch = i;
2040 buffer_info->mapped_as_page = false;
2041 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2042 DMA_TO_DEVICE);
2043 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2044 goto dma_error;
2045
2046
2047 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2048 const struct skb_frag_struct *frag;
2049
2050 count++;
2051 i++;
2052 if (i == tx_ring->count)
2053 i = 0;
2054
2055 frag = &skb_shinfo(skb)->frags[f];
2056 len = skb_frag_size(frag);
2057
2058 buffer_info = &tx_ring->buffer_info[i];
2059 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2060 buffer_info->length = len;
2061 buffer_info->time_stamp = jiffies;
2062 buffer_info->next_to_watch = i;
2063 buffer_info->mapped_as_page = true;
2064 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len,
2065 DMA_TO_DEVICE);
2066 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2067 goto dma_error;
2068 }
2069
2070 tx_ring->buffer_info[i].skb = skb;
2071 tx_ring->buffer_info[first].next_to_watch = i;
2072
2073 return ++count;
2074
2075 dma_error:
2076 dev_err(&pdev->dev, "TX DMA map failed\n");
2077
2078 /* clear timestamp and dma mappings for failed buffer_info mapping */
2079 buffer_info->dma = 0;
2080 buffer_info->time_stamp = 0;
2081 buffer_info->length = 0;
2082 buffer_info->next_to_watch = 0;
2083 buffer_info->mapped_as_page = false;
2084 if (count)
2085 count--;
2086
2087 /* clear timestamp and dma mappings for remaining portion of packet */
2088 while (count--) {
2089 if (i==0)
2090 i += tx_ring->count;
2091 i--;
2092 buffer_info = &tx_ring->buffer_info[i];
2093 igbvf_put_txbuf(adapter, buffer_info);
2094 }
2095
2096 return 0;
2097 }
2098
igbvf_tx_queue_adv(struct igbvf_adapter * adapter,struct igbvf_ring * tx_ring,int tx_flags,int count,u32 paylen,u8 hdr_len)2099 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2100 struct igbvf_ring *tx_ring,
2101 int tx_flags, int count, u32 paylen,
2102 u8 hdr_len)
2103 {
2104 union e1000_adv_tx_desc *tx_desc = NULL;
2105 struct igbvf_buffer *buffer_info;
2106 u32 olinfo_status = 0, cmd_type_len;
2107 unsigned int i;
2108
2109 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2110 E1000_ADVTXD_DCMD_DEXT);
2111
2112 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2113 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2114
2115 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2116 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2117
2118 /* insert tcp checksum */
2119 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2120
2121 /* insert ip checksum */
2122 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2123 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2124
2125 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2126 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2127 }
2128
2129 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2130
2131 i = tx_ring->next_to_use;
2132 while (count--) {
2133 buffer_info = &tx_ring->buffer_info[i];
2134 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2135 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2136 tx_desc->read.cmd_type_len =
2137 cpu_to_le32(cmd_type_len | buffer_info->length);
2138 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2139 i++;
2140 if (i == tx_ring->count)
2141 i = 0;
2142 }
2143
2144 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2145 /* Force memory writes to complete before letting h/w
2146 * know there are new descriptors to fetch. (Only
2147 * applicable for weak-ordered memory model archs,
2148 * such as IA-64). */
2149 wmb();
2150
2151 tx_ring->next_to_use = i;
2152 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2153 /* we need this if more than one processor can write to our tail
2154 * at a time, it syncronizes IO on IA64/Altix systems */
2155 mmiowb();
2156 }
2157
igbvf_xmit_frame_ring_adv(struct sk_buff * skb,struct net_device * netdev,struct igbvf_ring * tx_ring)2158 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2159 struct net_device *netdev,
2160 struct igbvf_ring *tx_ring)
2161 {
2162 struct igbvf_adapter *adapter = netdev_priv(netdev);
2163 unsigned int first, tx_flags = 0;
2164 u8 hdr_len = 0;
2165 int count = 0;
2166 int tso = 0;
2167
2168 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2169 dev_kfree_skb_any(skb);
2170 return NETDEV_TX_OK;
2171 }
2172
2173 if (skb->len <= 0) {
2174 dev_kfree_skb_any(skb);
2175 return NETDEV_TX_OK;
2176 }
2177
2178 /*
2179 * need: count + 4 desc gap to keep tail from touching
2180 * + 2 desc gap to keep tail from touching head,
2181 * + 1 desc for skb->data,
2182 * + 1 desc for context descriptor,
2183 * head, otherwise try next time
2184 */
2185 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2186 /* this is a hard error */
2187 return NETDEV_TX_BUSY;
2188 }
2189
2190 if (vlan_tx_tag_present(skb)) {
2191 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2192 tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT);
2193 }
2194
2195 if (skb->protocol == htons(ETH_P_IP))
2196 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2197
2198 first = tx_ring->next_to_use;
2199
2200 tso = skb_is_gso(skb) ?
2201 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0;
2202 if (unlikely(tso < 0)) {
2203 dev_kfree_skb_any(skb);
2204 return NETDEV_TX_OK;
2205 }
2206
2207 if (tso)
2208 tx_flags |= IGBVF_TX_FLAGS_TSO;
2209 else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
2210 (skb->ip_summed == CHECKSUM_PARTIAL))
2211 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2212
2213 /*
2214 * count reflects descriptors mapped, if 0 then mapping error
2215 * has occurred and we need to rewind the descriptor queue
2216 */
2217 count = igbvf_tx_map_adv(adapter, tx_ring, skb, first);
2218
2219 if (count) {
2220 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2221 skb->len, hdr_len);
2222 /* Make sure there is space in the ring for the next send. */
2223 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2224 } else {
2225 dev_kfree_skb_any(skb);
2226 tx_ring->buffer_info[first].time_stamp = 0;
2227 tx_ring->next_to_use = first;
2228 }
2229
2230 return NETDEV_TX_OK;
2231 }
2232
igbvf_xmit_frame(struct sk_buff * skb,struct net_device * netdev)2233 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2234 struct net_device *netdev)
2235 {
2236 struct igbvf_adapter *adapter = netdev_priv(netdev);
2237 struct igbvf_ring *tx_ring;
2238
2239 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2240 dev_kfree_skb_any(skb);
2241 return NETDEV_TX_OK;
2242 }
2243
2244 tx_ring = &adapter->tx_ring[0];
2245
2246 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2247 }
2248
2249 /**
2250 * igbvf_tx_timeout - Respond to a Tx Hang
2251 * @netdev: network interface device structure
2252 **/
igbvf_tx_timeout(struct net_device * netdev)2253 static void igbvf_tx_timeout(struct net_device *netdev)
2254 {
2255 struct igbvf_adapter *adapter = netdev_priv(netdev);
2256
2257 /* Do the reset outside of interrupt context */
2258 adapter->tx_timeout_count++;
2259 schedule_work(&adapter->reset_task);
2260 }
2261
igbvf_reset_task(struct work_struct * work)2262 static void igbvf_reset_task(struct work_struct *work)
2263 {
2264 struct igbvf_adapter *adapter;
2265 adapter = container_of(work, struct igbvf_adapter, reset_task);
2266
2267 igbvf_reinit_locked(adapter);
2268 }
2269
2270 /**
2271 * igbvf_get_stats - Get System Network Statistics
2272 * @netdev: network interface device structure
2273 *
2274 * Returns the address of the device statistics structure.
2275 * The statistics are actually updated from the timer callback.
2276 **/
igbvf_get_stats(struct net_device * netdev)2277 static struct net_device_stats *igbvf_get_stats(struct net_device *netdev)
2278 {
2279 struct igbvf_adapter *adapter = netdev_priv(netdev);
2280
2281 /* only return the current stats */
2282 return &adapter->net_stats;
2283 }
2284
2285 /**
2286 * igbvf_change_mtu - Change the Maximum Transfer Unit
2287 * @netdev: network interface device structure
2288 * @new_mtu: new value for maximum frame size
2289 *
2290 * Returns 0 on success, negative on failure
2291 **/
igbvf_change_mtu(struct net_device * netdev,int new_mtu)2292 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2293 {
2294 struct igbvf_adapter *adapter = netdev_priv(netdev);
2295 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2296
2297 if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2298 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n");
2299 return -EINVAL;
2300 }
2301
2302 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2303 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2304 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
2305 return -EINVAL;
2306 }
2307
2308 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2309 msleep(1);
2310 /* igbvf_down has a dependency on max_frame_size */
2311 adapter->max_frame_size = max_frame;
2312 if (netif_running(netdev))
2313 igbvf_down(adapter);
2314
2315 /*
2316 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2317 * means we reserve 2 more, this pushes us to allocate from the next
2318 * larger slab size.
2319 * i.e. RXBUFFER_2048 --> size-4096 slab
2320 * However with the new *_jumbo_rx* routines, jumbo receives will use
2321 * fragmented skbs
2322 */
2323
2324 if (max_frame <= 1024)
2325 adapter->rx_buffer_len = 1024;
2326 else if (max_frame <= 2048)
2327 adapter->rx_buffer_len = 2048;
2328 else
2329 #if (PAGE_SIZE / 2) > 16384
2330 adapter->rx_buffer_len = 16384;
2331 #else
2332 adapter->rx_buffer_len = PAGE_SIZE / 2;
2333 #endif
2334
2335
2336 /* adjust allocation if LPE protects us, and we aren't using SBP */
2337 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2338 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2339 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2340 ETH_FCS_LEN;
2341
2342 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
2343 netdev->mtu, new_mtu);
2344 netdev->mtu = new_mtu;
2345
2346 if (netif_running(netdev))
2347 igbvf_up(adapter);
2348 else
2349 igbvf_reset(adapter);
2350
2351 clear_bit(__IGBVF_RESETTING, &adapter->state);
2352
2353 return 0;
2354 }
2355
igbvf_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)2356 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2357 {
2358 switch (cmd) {
2359 default:
2360 return -EOPNOTSUPP;
2361 }
2362 }
2363
igbvf_suspend(struct pci_dev * pdev,pm_message_t state)2364 static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state)
2365 {
2366 struct net_device *netdev = pci_get_drvdata(pdev);
2367 struct igbvf_adapter *adapter = netdev_priv(netdev);
2368 #ifdef CONFIG_PM
2369 int retval = 0;
2370 #endif
2371
2372 netif_device_detach(netdev);
2373
2374 if (netif_running(netdev)) {
2375 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2376 igbvf_down(adapter);
2377 igbvf_free_irq(adapter);
2378 }
2379
2380 #ifdef CONFIG_PM
2381 retval = pci_save_state(pdev);
2382 if (retval)
2383 return retval;
2384 #endif
2385
2386 pci_disable_device(pdev);
2387
2388 return 0;
2389 }
2390
2391 #ifdef CONFIG_PM
igbvf_resume(struct pci_dev * pdev)2392 static int igbvf_resume(struct pci_dev *pdev)
2393 {
2394 struct net_device *netdev = pci_get_drvdata(pdev);
2395 struct igbvf_adapter *adapter = netdev_priv(netdev);
2396 u32 err;
2397
2398 pci_restore_state(pdev);
2399 err = pci_enable_device_mem(pdev);
2400 if (err) {
2401 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2402 return err;
2403 }
2404
2405 pci_set_master(pdev);
2406
2407 if (netif_running(netdev)) {
2408 err = igbvf_request_irq(adapter);
2409 if (err)
2410 return err;
2411 }
2412
2413 igbvf_reset(adapter);
2414
2415 if (netif_running(netdev))
2416 igbvf_up(adapter);
2417
2418 netif_device_attach(netdev);
2419
2420 return 0;
2421 }
2422 #endif
2423
igbvf_shutdown(struct pci_dev * pdev)2424 static void igbvf_shutdown(struct pci_dev *pdev)
2425 {
2426 igbvf_suspend(pdev, PMSG_SUSPEND);
2427 }
2428
2429 #ifdef CONFIG_NET_POLL_CONTROLLER
2430 /*
2431 * Polling 'interrupt' - used by things like netconsole to send skbs
2432 * without having to re-enable interrupts. It's not called while
2433 * the interrupt routine is executing.
2434 */
igbvf_netpoll(struct net_device * netdev)2435 static void igbvf_netpoll(struct net_device *netdev)
2436 {
2437 struct igbvf_adapter *adapter = netdev_priv(netdev);
2438
2439 disable_irq(adapter->pdev->irq);
2440
2441 igbvf_clean_tx_irq(adapter->tx_ring);
2442
2443 enable_irq(adapter->pdev->irq);
2444 }
2445 #endif
2446
2447 /**
2448 * igbvf_io_error_detected - called when PCI error is detected
2449 * @pdev: Pointer to PCI device
2450 * @state: The current pci connection state
2451 *
2452 * This function is called after a PCI bus error affecting
2453 * this device has been detected.
2454 */
igbvf_io_error_detected(struct pci_dev * pdev,pci_channel_state_t state)2455 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2456 pci_channel_state_t state)
2457 {
2458 struct net_device *netdev = pci_get_drvdata(pdev);
2459 struct igbvf_adapter *adapter = netdev_priv(netdev);
2460
2461 netif_device_detach(netdev);
2462
2463 if (state == pci_channel_io_perm_failure)
2464 return PCI_ERS_RESULT_DISCONNECT;
2465
2466 if (netif_running(netdev))
2467 igbvf_down(adapter);
2468 pci_disable_device(pdev);
2469
2470 /* Request a slot slot reset. */
2471 return PCI_ERS_RESULT_NEED_RESET;
2472 }
2473
2474 /**
2475 * igbvf_io_slot_reset - called after the pci bus has been reset.
2476 * @pdev: Pointer to PCI device
2477 *
2478 * Restart the card from scratch, as if from a cold-boot. Implementation
2479 * resembles the first-half of the igbvf_resume routine.
2480 */
igbvf_io_slot_reset(struct pci_dev * pdev)2481 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2482 {
2483 struct net_device *netdev = pci_get_drvdata(pdev);
2484 struct igbvf_adapter *adapter = netdev_priv(netdev);
2485
2486 if (pci_enable_device_mem(pdev)) {
2487 dev_err(&pdev->dev,
2488 "Cannot re-enable PCI device after reset.\n");
2489 return PCI_ERS_RESULT_DISCONNECT;
2490 }
2491 pci_set_master(pdev);
2492
2493 igbvf_reset(adapter);
2494
2495 return PCI_ERS_RESULT_RECOVERED;
2496 }
2497
2498 /**
2499 * igbvf_io_resume - called when traffic can start flowing again.
2500 * @pdev: Pointer to PCI device
2501 *
2502 * This callback is called when the error recovery driver tells us that
2503 * its OK to resume normal operation. Implementation resembles the
2504 * second-half of the igbvf_resume routine.
2505 */
igbvf_io_resume(struct pci_dev * pdev)2506 static void igbvf_io_resume(struct pci_dev *pdev)
2507 {
2508 struct net_device *netdev = pci_get_drvdata(pdev);
2509 struct igbvf_adapter *adapter = netdev_priv(netdev);
2510
2511 if (netif_running(netdev)) {
2512 if (igbvf_up(adapter)) {
2513 dev_err(&pdev->dev,
2514 "can't bring device back up after reset\n");
2515 return;
2516 }
2517 }
2518
2519 netif_device_attach(netdev);
2520 }
2521
igbvf_print_device_info(struct igbvf_adapter * adapter)2522 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2523 {
2524 struct e1000_hw *hw = &adapter->hw;
2525 struct net_device *netdev = adapter->netdev;
2526 struct pci_dev *pdev = adapter->pdev;
2527
2528 if (hw->mac.type == e1000_vfadapt_i350)
2529 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n");
2530 else
2531 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2532 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2533 }
2534
igbvf_set_features(struct net_device * netdev,netdev_features_t features)2535 static int igbvf_set_features(struct net_device *netdev,
2536 netdev_features_t features)
2537 {
2538 struct igbvf_adapter *adapter = netdev_priv(netdev);
2539
2540 if (features & NETIF_F_RXCSUM)
2541 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED;
2542 else
2543 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED;
2544
2545 return 0;
2546 }
2547
2548 static const struct net_device_ops igbvf_netdev_ops = {
2549 .ndo_open = igbvf_open,
2550 .ndo_stop = igbvf_close,
2551 .ndo_start_xmit = igbvf_xmit_frame,
2552 .ndo_get_stats = igbvf_get_stats,
2553 .ndo_set_rx_mode = igbvf_set_multi,
2554 .ndo_set_mac_address = igbvf_set_mac,
2555 .ndo_change_mtu = igbvf_change_mtu,
2556 .ndo_do_ioctl = igbvf_ioctl,
2557 .ndo_tx_timeout = igbvf_tx_timeout,
2558 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2559 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2560 #ifdef CONFIG_NET_POLL_CONTROLLER
2561 .ndo_poll_controller = igbvf_netpoll,
2562 #endif
2563 .ndo_set_features = igbvf_set_features,
2564 };
2565
2566 /**
2567 * igbvf_probe - Device Initialization Routine
2568 * @pdev: PCI device information struct
2569 * @ent: entry in igbvf_pci_tbl
2570 *
2571 * Returns 0 on success, negative on failure
2572 *
2573 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2574 * The OS initialization, configuring of the adapter private structure,
2575 * and a hardware reset occur.
2576 **/
igbvf_probe(struct pci_dev * pdev,const struct pci_device_id * ent)2577 static int __devinit igbvf_probe(struct pci_dev *pdev,
2578 const struct pci_device_id *ent)
2579 {
2580 struct net_device *netdev;
2581 struct igbvf_adapter *adapter;
2582 struct e1000_hw *hw;
2583 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2584
2585 static int cards_found;
2586 int err, pci_using_dac;
2587
2588 err = pci_enable_device_mem(pdev);
2589 if (err)
2590 return err;
2591
2592 pci_using_dac = 0;
2593 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
2594 if (!err) {
2595 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2596 if (!err)
2597 pci_using_dac = 1;
2598 } else {
2599 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
2600 if (err) {
2601 err = dma_set_coherent_mask(&pdev->dev,
2602 DMA_BIT_MASK(32));
2603 if (err) {
2604 dev_err(&pdev->dev, "No usable DMA "
2605 "configuration, aborting\n");
2606 goto err_dma;
2607 }
2608 }
2609 }
2610
2611 err = pci_request_regions(pdev, igbvf_driver_name);
2612 if (err)
2613 goto err_pci_reg;
2614
2615 pci_set_master(pdev);
2616
2617 err = -ENOMEM;
2618 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2619 if (!netdev)
2620 goto err_alloc_etherdev;
2621
2622 SET_NETDEV_DEV(netdev, &pdev->dev);
2623
2624 pci_set_drvdata(pdev, netdev);
2625 adapter = netdev_priv(netdev);
2626 hw = &adapter->hw;
2627 adapter->netdev = netdev;
2628 adapter->pdev = pdev;
2629 adapter->ei = ei;
2630 adapter->pba = ei->pba;
2631 adapter->flags = ei->flags;
2632 adapter->hw.back = adapter;
2633 adapter->hw.mac.type = ei->mac;
2634 adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
2635
2636 /* PCI config space info */
2637
2638 hw->vendor_id = pdev->vendor;
2639 hw->device_id = pdev->device;
2640 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2641 hw->subsystem_device_id = pdev->subsystem_device;
2642 hw->revision_id = pdev->revision;
2643
2644 err = -EIO;
2645 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2646 pci_resource_len(pdev, 0));
2647
2648 if (!adapter->hw.hw_addr)
2649 goto err_ioremap;
2650
2651 if (ei->get_variants) {
2652 err = ei->get_variants(adapter);
2653 if (err)
2654 goto err_ioremap;
2655 }
2656
2657 /* setup adapter struct */
2658 err = igbvf_sw_init(adapter);
2659 if (err)
2660 goto err_sw_init;
2661
2662 /* construct the net_device struct */
2663 netdev->netdev_ops = &igbvf_netdev_ops;
2664
2665 igbvf_set_ethtool_ops(netdev);
2666 netdev->watchdog_timeo = 5 * HZ;
2667 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2668
2669 adapter->bd_number = cards_found++;
2670
2671 netdev->hw_features = NETIF_F_SG |
2672 NETIF_F_IP_CSUM |
2673 NETIF_F_IPV6_CSUM |
2674 NETIF_F_TSO |
2675 NETIF_F_TSO6 |
2676 NETIF_F_RXCSUM;
2677
2678 netdev->features = netdev->hw_features |
2679 NETIF_F_HW_VLAN_TX |
2680 NETIF_F_HW_VLAN_RX |
2681 NETIF_F_HW_VLAN_FILTER;
2682
2683 if (pci_using_dac)
2684 netdev->features |= NETIF_F_HIGHDMA;
2685
2686 netdev->vlan_features |= NETIF_F_TSO;
2687 netdev->vlan_features |= NETIF_F_TSO6;
2688 netdev->vlan_features |= NETIF_F_IP_CSUM;
2689 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
2690 netdev->vlan_features |= NETIF_F_SG;
2691
2692 /*reset the controller to put the device in a known good state */
2693 err = hw->mac.ops.reset_hw(hw);
2694 if (err) {
2695 dev_info(&pdev->dev,
2696 "PF still in reset state, assigning new address."
2697 " Is the PF interface up?\n");
2698 dev_hw_addr_random(adapter->netdev, hw->mac.addr);
2699 } else {
2700 err = hw->mac.ops.read_mac_addr(hw);
2701 if (err) {
2702 dev_err(&pdev->dev, "Error reading MAC address\n");
2703 goto err_hw_init;
2704 }
2705 }
2706
2707 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2708 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2709
2710 if (!is_valid_ether_addr(netdev->perm_addr)) {
2711 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n",
2712 netdev->dev_addr);
2713 err = -EIO;
2714 goto err_hw_init;
2715 }
2716
2717 setup_timer(&adapter->watchdog_timer, &igbvf_watchdog,
2718 (unsigned long) adapter);
2719
2720 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2721 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2722
2723 /* ring size defaults */
2724 adapter->rx_ring->count = 1024;
2725 adapter->tx_ring->count = 1024;
2726
2727 /* reset the hardware with the new settings */
2728 igbvf_reset(adapter);
2729
2730 strcpy(netdev->name, "eth%d");
2731 err = register_netdev(netdev);
2732 if (err)
2733 goto err_hw_init;
2734
2735 /* tell the stack to leave us alone until igbvf_open() is called */
2736 netif_carrier_off(netdev);
2737 netif_stop_queue(netdev);
2738
2739 igbvf_print_device_info(adapter);
2740
2741 igbvf_initialize_last_counter_stats(adapter);
2742
2743 return 0;
2744
2745 err_hw_init:
2746 kfree(adapter->tx_ring);
2747 kfree(adapter->rx_ring);
2748 err_sw_init:
2749 igbvf_reset_interrupt_capability(adapter);
2750 iounmap(adapter->hw.hw_addr);
2751 err_ioremap:
2752 free_netdev(netdev);
2753 err_alloc_etherdev:
2754 pci_release_regions(pdev);
2755 err_pci_reg:
2756 err_dma:
2757 pci_disable_device(pdev);
2758 return err;
2759 }
2760
2761 /**
2762 * igbvf_remove - Device Removal Routine
2763 * @pdev: PCI device information struct
2764 *
2765 * igbvf_remove is called by the PCI subsystem to alert the driver
2766 * that it should release a PCI device. The could be caused by a
2767 * Hot-Plug event, or because the driver is going to be removed from
2768 * memory.
2769 **/
igbvf_remove(struct pci_dev * pdev)2770 static void __devexit igbvf_remove(struct pci_dev *pdev)
2771 {
2772 struct net_device *netdev = pci_get_drvdata(pdev);
2773 struct igbvf_adapter *adapter = netdev_priv(netdev);
2774 struct e1000_hw *hw = &adapter->hw;
2775
2776 /*
2777 * The watchdog timer may be rescheduled, so explicitly
2778 * disable it from being rescheduled.
2779 */
2780 set_bit(__IGBVF_DOWN, &adapter->state);
2781 del_timer_sync(&adapter->watchdog_timer);
2782
2783 cancel_work_sync(&adapter->reset_task);
2784 cancel_work_sync(&adapter->watchdog_task);
2785
2786 unregister_netdev(netdev);
2787
2788 igbvf_reset_interrupt_capability(adapter);
2789
2790 /*
2791 * it is important to delete the napi struct prior to freeing the
2792 * rx ring so that you do not end up with null pointer refs
2793 */
2794 netif_napi_del(&adapter->rx_ring->napi);
2795 kfree(adapter->tx_ring);
2796 kfree(adapter->rx_ring);
2797
2798 iounmap(hw->hw_addr);
2799 if (hw->flash_address)
2800 iounmap(hw->flash_address);
2801 pci_release_regions(pdev);
2802
2803 free_netdev(netdev);
2804
2805 pci_disable_device(pdev);
2806 }
2807
2808 /* PCI Error Recovery (ERS) */
2809 static struct pci_error_handlers igbvf_err_handler = {
2810 .error_detected = igbvf_io_error_detected,
2811 .slot_reset = igbvf_io_slot_reset,
2812 .resume = igbvf_io_resume,
2813 };
2814
2815 static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl) = {
2816 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2817 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
2818 { } /* terminate list */
2819 };
2820 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2821
2822 /* PCI Device API Driver */
2823 static struct pci_driver igbvf_driver = {
2824 .name = igbvf_driver_name,
2825 .id_table = igbvf_pci_tbl,
2826 .probe = igbvf_probe,
2827 .remove = __devexit_p(igbvf_remove),
2828 #ifdef CONFIG_PM
2829 /* Power Management Hooks */
2830 .suspend = igbvf_suspend,
2831 .resume = igbvf_resume,
2832 #endif
2833 .shutdown = igbvf_shutdown,
2834 .err_handler = &igbvf_err_handler
2835 };
2836
2837 /**
2838 * igbvf_init_module - Driver Registration Routine
2839 *
2840 * igbvf_init_module is the first routine called when the driver is
2841 * loaded. All it does is register with the PCI subsystem.
2842 **/
igbvf_init_module(void)2843 static int __init igbvf_init_module(void)
2844 {
2845 int ret;
2846 pr_info("%s - version %s\n", igbvf_driver_string, igbvf_driver_version);
2847 pr_info("%s\n", igbvf_copyright);
2848
2849 ret = pci_register_driver(&igbvf_driver);
2850
2851 return ret;
2852 }
2853 module_init(igbvf_init_module);
2854
2855 /**
2856 * igbvf_exit_module - Driver Exit Cleanup Routine
2857 *
2858 * igbvf_exit_module is called just before the driver is removed
2859 * from memory.
2860 **/
igbvf_exit_module(void)2861 static void __exit igbvf_exit_module(void)
2862 {
2863 pci_unregister_driver(&igbvf_driver);
2864 }
2865 module_exit(igbvf_exit_module);
2866
2867
2868 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2869 MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
2870 MODULE_LICENSE("GPL");
2871 MODULE_VERSION(DRV_VERSION);
2872
2873 /* netdev.c */
2874