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drivers/net/ethernet: Fix (nearly-)kernel-doc comments for various functions
[deliverable/linux.git] / drivers / net / ethernet / intel / igbvf / netdev.c
CommitLineData
d4e0fe01
AD		 1/*******************************************************************************
2
3 Intel(R) 82576 Virtual Function Linux driver
2a06ed92 4 Copyright(c) 2009 - 2012 Intel Corporation.
d4e0fe01
AD		 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
a4ba8cbe
JK		 28#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29
d4e0fe01
AD		 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>
5a0e3ad6 40#include <linux/slab.h>
d4e0fe01
AD		 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>
70c71606 46#include <linux/prefetch.h>
d4e0fe01
AD		 47
48#include "igbvf.h"
49
7d94eb84 50#define DRV_VERSION "2.0.1-k"
d4e0fe01
AD		 51char igbvf_driver_name[] = "igbvf";
52const char igbvf_driver_version[] = DRV_VERSION;
53static const char igbvf_driver_string[] =
10090751 54 "Intel(R) Gigabit Virtual Function Network Driver";
2c20ebba 55static const char igbvf_copyright[] =
2a06ed92 56 "Copyright (c) 2009 - 2012 Intel Corporation.";
d4e0fe01 57
b3f4d599 58#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
59static int debug = -1;
60module_param(debug, int, 0);
61MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
62
d4e0fe01 63static int igbvf_poll(struct napi_struct *napi, int budget);
2d165771
AD		 64static void igbvf_reset(struct igbvf_adapter *);
65static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
66static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
d4e0fe01
AD		 67
68static struct igbvf_info igbvf_vf_info = {
69 .mac = e1000_vfadapt,
0364d6fd 70 .flags = 0,
d4e0fe01
AD		 71 .pba = 10,
72 .init_ops = e1000_init_function_pointers_vf,
73};
74
031d7952
WM		 75static struct igbvf_info igbvf_i350_vf_info = {
76 .mac = e1000_vfadapt_i350,
77 .flags = 0,
78 .pba = 10,
79 .init_ops = e1000_init_function_pointers_vf,
80};
81
d4e0fe01
AD		 82static const struct igbvf_info *igbvf_info_tbl[] = {
83 [board_vf] = &igbvf_vf_info,
031d7952 84 [board_i350_vf] = &igbvf_i350_vf_info,
d4e0fe01
AD		 85};
86
87/**
88 * igbvf_desc_unused - calculate if we have unused descriptors
89 **/
90static int igbvf_desc_unused(struct igbvf_ring *ring)
91{
92 if (ring->next_to_clean > ring->next_to_use)
93 return ring->next_to_clean - ring->next_to_use - 1;
94
95 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
96}
97
98/**
99 * igbvf_receive_skb - helper function to handle Rx indications
100 * @adapter: board private structure
101 * @status: descriptor status field as written by hardware
102 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
103 * @skb: pointer to sk_buff to be indicated to stack
104 **/
105static void igbvf_receive_skb(struct igbvf_adapter *adapter,
106 struct net_device *netdev,
107 struct sk_buff *skb,
108 u32 status, u16 vlan)
109{
a0f1d603
JP		 110 if (status & E1000_RXD_STAT_VP) {
111 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4d2d55ac
GR		 112 if (test_bit(vid, adapter->active_vlans))
113 __vlan_hwaccel_put_tag(skb, vid);
a0f1d603
JP		 114 }
115 netif_receive_skb(skb);
d4e0fe01
AD		 116}
117
118static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
119 u32 status_err, struct sk_buff *skb)
120{
bc8acf2c 121 skb_checksum_none_assert(skb);
d4e0fe01
AD		 122
123 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
0364d6fd
AD		 124 if ((status_err & E1000_RXD_STAT_IXSM) ||
125 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
d4e0fe01 126 return;
0364d6fd 127
d4e0fe01
AD		 128 /* TCP/UDP checksum error bit is set */
129 if (status_err &
130 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
131 /* let the stack verify checksum errors */
132 adapter->hw_csum_err++;
133 return;
134 }
0364d6fd 135
d4e0fe01
AD		 136 /* It must be a TCP or UDP packet with a valid checksum */
137 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
138 skb->ip_summed = CHECKSUM_UNNECESSARY;
139
140 adapter->hw_csum_good++;
141}
142
143/**
144 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
145 * @rx_ring: address of ring structure to repopulate
146 * @cleaned_count: number of buffers to repopulate
147 **/
148static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
149 int cleaned_count)
150{
151 struct igbvf_adapter *adapter = rx_ring->adapter;
152 struct net_device *netdev = adapter->netdev;
153 struct pci_dev *pdev = adapter->pdev;
154 union e1000_adv_rx_desc *rx_desc;
155 struct igbvf_buffer *buffer_info;
156 struct sk_buff *skb;
157 unsigned int i;
158 int bufsz;
159
160 i = rx_ring->next_to_use;
161 buffer_info = &rx_ring->buffer_info[i];
162
163 if (adapter->rx_ps_hdr_size)
164 bufsz = adapter->rx_ps_hdr_size;
165 else
166 bufsz = adapter->rx_buffer_len;
d4e0fe01
AD		 167
168 while (cleaned_count--) {
169 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
170
171 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
172 if (!buffer_info->page) {
173 buffer_info->page = alloc_page(GFP_ATOMIC);
174 if (!buffer_info->page) {
175 adapter->alloc_rx_buff_failed++;
176 goto no_buffers;
177 }
178 buffer_info->page_offset = 0;
179 } else {
180 buffer_info->page_offset ^= PAGE_SIZE / 2;
181 }
182 buffer_info->page_dma =
123e9f1a 183 dma_map_page(&pdev->dev, buffer_info->page,
d4e0fe01
AD		 184 buffer_info->page_offset,
185 PAGE_SIZE / 2,
123e9f1a 186 DMA_FROM_DEVICE);
d4e0fe01
AD		 187 }
188
189 if (!buffer_info->skb) {
89d71a66 190 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
d4e0fe01
AD		 191 if (!skb) {
192 adapter->alloc_rx_buff_failed++;
193 goto no_buffers;
194 }
195
d4e0fe01 196 buffer_info->skb = skb;
123e9f1a 197 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
d4e0fe01 198 bufsz,
123e9f1a 199 DMA_FROM_DEVICE);
d4e0fe01
AD		 200 }
201 /* Refresh the desc even if buffer_addrs didn't change because
202 * each write-back erases this info. */
203 if (adapter->rx_ps_hdr_size) {
204 rx_desc->read.pkt_addr =
205 cpu_to_le64(buffer_info->page_dma);
206 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
207 } else {
208 rx_desc->read.pkt_addr =
209 cpu_to_le64(buffer_info->dma);
210 rx_desc->read.hdr_addr = 0;
211 }
212
213 i++;
214 if (i == rx_ring->count)
215 i = 0;
216 buffer_info = &rx_ring->buffer_info[i];
217 }
218
219no_buffers:
220 if (rx_ring->next_to_use != i) {
221 rx_ring->next_to_use = i;
222 if (i == 0)
223 i = (rx_ring->count - 1);
224 else
225 i--;
226
227 /* Force memory writes to complete before letting h/w
228 * know there are new descriptors to fetch. (Only
229 * applicable for weak-ordered memory model archs,
230 * such as IA-64). */
231 wmb();
232 writel(i, adapter->hw.hw_addr + rx_ring->tail);
233 }
234}
235
236/**
237 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
238 * @adapter: board private structure
239 *
240 * the return value indicates whether actual cleaning was done, there
241 * is no guarantee that everything was cleaned
242 **/
243static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
244 int *work_done, int work_to_do)
245{
246 struct igbvf_ring *rx_ring = adapter->rx_ring;
247 struct net_device *netdev = adapter->netdev;
248 struct pci_dev *pdev = adapter->pdev;
249 union e1000_adv_rx_desc *rx_desc, *next_rxd;
250 struct igbvf_buffer *buffer_info, *next_buffer;
251 struct sk_buff *skb;
252 bool cleaned = false;
253 int cleaned_count = 0;
254 unsigned int total_bytes = 0, total_packets = 0;
255 unsigned int i;
256 u32 length, hlen, staterr;
257
258 i = rx_ring->next_to_clean;
259 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
260 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
261
262 while (staterr & E1000_RXD_STAT_DD) {
263 if (*work_done >= work_to_do)
264 break;
265 (*work_done)++;
2d0bb1c1 266 rmb(); /* read descriptor and rx_buffer_info after status DD */
d4e0fe01
AD		 267
268 buffer_info = &rx_ring->buffer_info[i];
269
270 /* HW will not DMA in data larger than the given buffer, even
271 * if it parses the (NFS, of course) header to be larger. In
272 * that case, it fills the header buffer and spills the rest
273 * into the page.
274 */
275 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) &
276 E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
277 if (hlen > adapter->rx_ps_hdr_size)
278 hlen = adapter->rx_ps_hdr_size;
279
280 length = le16_to_cpu(rx_desc->wb.upper.length);
281 cleaned = true;
282 cleaned_count++;
283
284 skb = buffer_info->skb;
285 prefetch(skb->data - NET_IP_ALIGN);
286 buffer_info->skb = NULL;
287 if (!adapter->rx_ps_hdr_size) {
123e9f1a 288 dma_unmap_single(&pdev->dev, buffer_info->dma,
d4e0fe01 289 adapter->rx_buffer_len,
123e9f1a 290 DMA_FROM_DEVICE);
d4e0fe01
AD		 291 buffer_info->dma = 0;
292 skb_put(skb, length);
293 goto send_up;
294 }
295
296 if (!skb_shinfo(skb)->nr_frags) {
123e9f1a 297 dma_unmap_single(&pdev->dev, buffer_info->dma,
92d947b7 298 adapter->rx_ps_hdr_size,
123e9f1a 299 DMA_FROM_DEVICE);
d4e0fe01
AD		 300 skb_put(skb, hlen);
301 }
302
303 if (length) {
123e9f1a 304 dma_unmap_page(&pdev->dev, buffer_info->page_dma,
d4e0fe01 305 PAGE_SIZE / 2,
123e9f1a 306 DMA_FROM_DEVICE);
d4e0fe01
AD		 307 buffer_info->page_dma = 0;
308
ec857fd4 309 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
d4e0fe01
AD		 310 buffer_info->page,
311 buffer_info->page_offset,
312 length);
313
314 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
315 (page_count(buffer_info->page) != 1))
316 buffer_info->page = NULL;
317 else
318 get_page(buffer_info->page);
319
320 skb->len += length;
321 skb->data_len += length;
7b8b5961 322 skb->truesize += PAGE_SIZE / 2;
d4e0fe01
AD		 323 }
324send_up:
325 i++;
326 if (i == rx_ring->count)
327 i = 0;
328 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
329 prefetch(next_rxd);
330 next_buffer = &rx_ring->buffer_info[i];
331
332 if (!(staterr & E1000_RXD_STAT_EOP)) {
333 buffer_info->skb = next_buffer->skb;
334 buffer_info->dma = next_buffer->dma;
335 next_buffer->skb = skb;
336 next_buffer->dma = 0;
337 goto next_desc;
338 }
339
340 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
341 dev_kfree_skb_irq(skb);
342 goto next_desc;
343 }
344
345 total_bytes += skb->len;
346 total_packets++;
347
348 igbvf_rx_checksum_adv(adapter, staterr, skb);
349
350 skb->protocol = eth_type_trans(skb, netdev);
351
352 igbvf_receive_skb(adapter, netdev, skb, staterr,
353 rx_desc->wb.upper.vlan);
354
d4e0fe01
AD		 355next_desc:
356 rx_desc->wb.upper.status_error = 0;
357
358 /* return some buffers to hardware, one at a time is too slow */
359 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
360 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
361 cleaned_count = 0;
362 }
363
364 /* use prefetched values */
365 rx_desc = next_rxd;
366 buffer_info = next_buffer;
367
368 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
369 }
370
371 rx_ring->next_to_clean = i;
372 cleaned_count = igbvf_desc_unused(rx_ring);
373
374 if (cleaned_count)
375 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
376
377 adapter->total_rx_packets += total_packets;
378 adapter->total_rx_bytes += total_bytes;
379 adapter->net_stats.rx_bytes += total_bytes;
380 adapter->net_stats.rx_packets += total_packets;
381 return cleaned;
382}
383
384static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
385 struct igbvf_buffer *buffer_info)
386{
a7d5ca40
AD		 387 if (buffer_info->dma) {
388 if (buffer_info->mapped_as_page)
123e9f1a 389 dma_unmap_page(&adapter->pdev->dev,
a7d5ca40
AD		 390 buffer_info->dma,
391 buffer_info->length,
123e9f1a 392 DMA_TO_DEVICE);
a7d5ca40 393 else
123e9f1a 394 dma_unmap_single(&adapter->pdev->dev,
a7d5ca40
AD		 395 buffer_info->dma,
396 buffer_info->length,
123e9f1a 397 DMA_TO_DEVICE);
a7d5ca40
AD		 398 buffer_info->dma = 0;
399 }
d4e0fe01 400 if (buffer_info->skb) {
d4e0fe01
AD		 401 dev_kfree_skb_any(buffer_info->skb);
402 buffer_info->skb = NULL;
403 }
404 buffer_info->time_stamp = 0;
405}
406
d4e0fe01
AD		 407/**
408 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
409 * @adapter: board private structure
410 *
411 * Return 0 on success, negative on failure
412 **/
413int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
414 struct igbvf_ring *tx_ring)
415{
416 struct pci_dev *pdev = adapter->pdev;
417 int size;
418
419 size = sizeof(struct igbvf_buffer) * tx_ring->count;
89bf67f1 420 tx_ring->buffer_info = vzalloc(size);
d4e0fe01
AD		 421 if (!tx_ring->buffer_info)
422 goto err;
d4e0fe01
AD		 423
424 /* round up to nearest 4K */
425 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
426 tx_ring->size = ALIGN(tx_ring->size, 4096);
427
123e9f1a
NN		 428 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
429 &tx_ring->dma, GFP_KERNEL);
d4e0fe01
AD		 430
431 if (!tx_ring->desc)
432 goto err;
433
434 tx_ring->adapter = adapter;
435 tx_ring->next_to_use = 0;
436 tx_ring->next_to_clean = 0;
437
438 return 0;
439err:
440 vfree(tx_ring->buffer_info);
441 dev_err(&adapter->pdev->dev,
442 "Unable to allocate memory for the transmit descriptor ring\n");
443 return -ENOMEM;
444}
445
446/**
447 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
448 * @adapter: board private structure
449 *
450 * Returns 0 on success, negative on failure
451 **/
452int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
453 struct igbvf_ring *rx_ring)
454{
455 struct pci_dev *pdev = adapter->pdev;
456 int size, desc_len;
457
458 size = sizeof(struct igbvf_buffer) * rx_ring->count;
89bf67f1 459 rx_ring->buffer_info = vzalloc(size);
d4e0fe01
AD		 460 if (!rx_ring->buffer_info)
461 goto err;
d4e0fe01
AD		 462
463 desc_len = sizeof(union e1000_adv_rx_desc);
464
465 /* Round up to nearest 4K */
466 rx_ring->size = rx_ring->count * desc_len;
467 rx_ring->size = ALIGN(rx_ring->size, 4096);
468
123e9f1a
NN		 469 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
470 &rx_ring->dma, GFP_KERNEL);
d4e0fe01
AD		 471
472 if (!rx_ring->desc)
473 goto err;
474
475 rx_ring->next_to_clean = 0;
476 rx_ring->next_to_use = 0;
477
478 rx_ring->adapter = adapter;
479
480 return 0;
481
482err:
483 vfree(rx_ring->buffer_info);
484 rx_ring->buffer_info = NULL;
485 dev_err(&adapter->pdev->dev,
486 "Unable to allocate memory for the receive descriptor ring\n");
487 return -ENOMEM;
488}
489
490/**
491 * igbvf_clean_tx_ring - Free Tx Buffers
492 * @tx_ring: ring to be cleaned
493 **/
494static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
495{
496 struct igbvf_adapter *adapter = tx_ring->adapter;
497 struct igbvf_buffer *buffer_info;
498 unsigned long size;
499 unsigned int i;
500
501 if (!tx_ring->buffer_info)
502 return;
503
504 /* Free all the Tx ring sk_buffs */
505 for (i = 0; i < tx_ring->count; i++) {
506 buffer_info = &tx_ring->buffer_info[i];
507 igbvf_put_txbuf(adapter, buffer_info);
508 }
509
510 size = sizeof(struct igbvf_buffer) * tx_ring->count;
511 memset(tx_ring->buffer_info, 0, size);
512
513 /* Zero out the descriptor ring */
514 memset(tx_ring->desc, 0, tx_ring->size);
515
516 tx_ring->next_to_use = 0;
517 tx_ring->next_to_clean = 0;
518
519 writel(0, adapter->hw.hw_addr + tx_ring->head);
520 writel(0, adapter->hw.hw_addr + tx_ring->tail);
521}
522
523/**
524 * igbvf_free_tx_resources - Free Tx Resources per Queue
525 * @tx_ring: ring to free resources from
526 *
527 * Free all transmit software resources
528 **/
529void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
530{
531 struct pci_dev *pdev = tx_ring->adapter->pdev;
532
533 igbvf_clean_tx_ring(tx_ring);
534
535 vfree(tx_ring->buffer_info);
536 tx_ring->buffer_info = NULL;
537
123e9f1a
NN		 538 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
539 tx_ring->dma);
d4e0fe01
AD		 540
541 tx_ring->desc = NULL;
542}
543
544/**
545 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
546 * @adapter: board private structure
547 **/
548static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
549{
550 struct igbvf_adapter *adapter = rx_ring->adapter;
551 struct igbvf_buffer *buffer_info;
552 struct pci_dev *pdev = adapter->pdev;
553 unsigned long size;
554 unsigned int i;
555
556 if (!rx_ring->buffer_info)
557 return;
558
559 /* Free all the Rx ring sk_buffs */
560 for (i = 0; i < rx_ring->count; i++) {
561 buffer_info = &rx_ring->buffer_info[i];
562 if (buffer_info->dma) {
563 if (adapter->rx_ps_hdr_size){
123e9f1a 564 dma_unmap_single(&pdev->dev, buffer_info->dma,
d4e0fe01 565 adapter->rx_ps_hdr_size,
123e9f1a 566 DMA_FROM_DEVICE);
d4e0fe01 567 } else {
123e9f1a 568 dma_unmap_single(&pdev->dev, buffer_info->dma,
d4e0fe01 569 adapter->rx_buffer_len,
123e9f1a 570 DMA_FROM_DEVICE);
d4e0fe01
AD		 571 }
572 buffer_info->dma = 0;
573 }
574
575 if (buffer_info->skb) {
576 dev_kfree_skb(buffer_info->skb);
577 buffer_info->skb = NULL;
578 }
579
580 if (buffer_info->page) {
581 if (buffer_info->page_dma)
123e9f1a
NN		 582 dma_unmap_page(&pdev->dev,
583 buffer_info->page_dma,
d4e0fe01 584 PAGE_SIZE / 2,
123e9f1a 585 DMA_FROM_DEVICE);
d4e0fe01
AD		 586 put_page(buffer_info->page);
587 buffer_info->page = NULL;
588 buffer_info->page_dma = 0;
589 buffer_info->page_offset = 0;
590 }
591 }
592
593 size = sizeof(struct igbvf_buffer) * rx_ring->count;
594 memset(rx_ring->buffer_info, 0, size);
595
596 /* Zero out the descriptor ring */
597 memset(rx_ring->desc, 0, rx_ring->size);
598
599 rx_ring->next_to_clean = 0;
600 rx_ring->next_to_use = 0;
601
602 writel(0, adapter->hw.hw_addr + rx_ring->head);
603 writel(0, adapter->hw.hw_addr + rx_ring->tail);
604}
605
606/**
607 * igbvf_free_rx_resources - Free Rx Resources
608 * @rx_ring: ring to clean the resources from
609 *
610 * Free all receive software resources
611 **/
612
613void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
614{
615 struct pci_dev *pdev = rx_ring->adapter->pdev;
616
617 igbvf_clean_rx_ring(rx_ring);
618
619 vfree(rx_ring->buffer_info);
620 rx_ring->buffer_info = NULL;
621
622 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
623 rx_ring->dma);
624 rx_ring->desc = NULL;
625}
626
627/**
628 * igbvf_update_itr - update the dynamic ITR value based on statistics
629 * @adapter: pointer to adapter
630 * @itr_setting: current adapter->itr
631 * @packets: the number of packets during this measurement interval
632 * @bytes: the number of bytes during this measurement interval
633 *
634 * Stores a new ITR value based on packets and byte
635 * counts during the last interrupt. The advantage of per interrupt
636 * computation is faster updates and more accurate ITR for the current
637 * traffic pattern. Constants in this function were computed
638 * based on theoretical maximum wire speed and thresholds were set based
639 * on testing data as well as attempting to minimize response time
ab50a2a4 640 * while increasing bulk throughput.
d4e0fe01 641 **/
ab50a2a4
MW		 642static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter,
643 enum latency_range itr_setting,
644 int packets, int bytes)
d4e0fe01 645{
ab50a2a4 646 enum latency_range retval = itr_setting;
d4e0fe01
AD		 647
648 if (packets == 0)
649 goto update_itr_done;
650
651 switch (itr_setting) {
652 case lowest_latency:
653 /* handle TSO and jumbo frames */
654 if (bytes/packets > 8000)
655 retval = bulk_latency;
656 else if ((packets < 5) && (bytes > 512))
657 retval = low_latency;
658 break;
659 case low_latency: /* 50 usec aka 20000 ints/s */
660 if (bytes > 10000) {
661 /* this if handles the TSO accounting */
662 if (bytes/packets > 8000)
663 retval = bulk_latency;
664 else if ((packets < 10) || ((bytes/packets) > 1200))
665 retval = bulk_latency;
666 else if ((packets > 35))
667 retval = lowest_latency;
668 } else if (bytes/packets > 2000) {
669 retval = bulk_latency;
670 } else if (packets <= 2 && bytes < 512) {
671 retval = lowest_latency;
672 }
673 break;
674 case bulk_latency: /* 250 usec aka 4000 ints/s */
675 if (bytes > 25000) {
676 if (packets > 35)
677 retval = low_latency;
678 } else if (bytes < 6000) {
679 retval = low_latency;
680 }
681 break;
ab50a2a4
MW		 682 default:
683 break;
d4e0fe01
AD		 684 }
685
686update_itr_done:
687 return retval;
688}
689
ab50a2a4 690static int igbvf_range_to_itr(enum latency_range current_range)
d4e0fe01 691{
ab50a2a4 692 int new_itr;
d4e0fe01 693
ab50a2a4 694 switch (current_range) {
d4e0fe01
AD		 695 /* counts and packets in update_itr are dependent on these numbers */
696 case lowest_latency:
ab50a2a4 697 new_itr = IGBVF_70K_ITR;
d4e0fe01
AD		 698 break;
699 case low_latency:
ab50a2a4 700 new_itr = IGBVF_20K_ITR;
d4e0fe01
AD		 701 break;
702 case bulk_latency:
ab50a2a4 703 new_itr = IGBVF_4K_ITR;
d4e0fe01
AD		 704 break;
705 default:
ab50a2a4 706 new_itr = IGBVF_START_ITR;
d4e0fe01
AD		 707 break;
708 }
ab50a2a4
MW		 709 return new_itr;
710}
711
712static void igbvf_set_itr(struct igbvf_adapter *adapter)
713{
714 u32 new_itr;
715
716 adapter->tx_ring->itr_range =
717 igbvf_update_itr(adapter,
718 adapter->tx_ring->itr_val,
719 adapter->total_tx_packets,
720 adapter->total_tx_bytes);
721
722 /* conservative mode (itr 3) eliminates the lowest_latency setting */
723 if (adapter->requested_itr == 3 &&
724 adapter->tx_ring->itr_range == lowest_latency)
725 adapter->tx_ring->itr_range = low_latency;
d4e0fe01 726
ab50a2a4
MW		 727 new_itr = igbvf_range_to_itr(adapter->tx_ring->itr_range);
728
729
730 if (new_itr != adapter->tx_ring->itr_val) {
731 u32 current_itr = adapter->tx_ring->itr_val;
d4e0fe01
AD		 732 /*
733 * this attempts to bias the interrupt rate towards Bulk
734 * by adding intermediate steps when interrupt rate is
735 * increasing
736 */
ab50a2a4
MW		 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 new_itr = new_itr > current_itr ?
758 min(current_itr + (new_itr >> 2), new_itr) :
759 new_itr;
760 adapter->rx_ring->itr_val = new_itr;
761
762 adapter->rx_ring->set_itr = 1;
d4e0fe01
AD		 763 }
764}
765
766/**
767 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
768 * @adapter: board private structure
49ce9c2c 769 *
d4e0fe01
AD		 770 * returns true if ring is completely cleaned
771 **/
772static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
773{
774 struct igbvf_adapter *adapter = tx_ring->adapter;
d4e0fe01
AD		 775 struct net_device *netdev = adapter->netdev;
776 struct igbvf_buffer *buffer_info;
777 struct sk_buff *skb;
778 union e1000_adv_tx_desc *tx_desc, *eop_desc;
779 unsigned int total_bytes = 0, total_packets = 0;
780 unsigned int i, eop, count = 0;
781 bool cleaned = false;
782
783 i = tx_ring->next_to_clean;
784 eop = tx_ring->buffer_info[i].next_to_watch;
785 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
786
787 while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
788 (count < tx_ring->count)) {
2d0bb1c1 789 rmb(); /* read buffer_info after eop_desc status */
d4e0fe01
AD		 790 for (cleaned = false; !cleaned; count++) {
791 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
792 buffer_info = &tx_ring->buffer_info[i];
793 cleaned = (i == eop);
794 skb = buffer_info->skb;
795
796 if (skb) {
797 unsigned int segs, bytecount;
798
799 /* gso_segs is currently only valid for tcp */
800 segs = skb_shinfo(skb)->gso_segs ?: 1;
801 /* multiply data chunks by size of headers */
802 bytecount = ((segs - 1) * skb_headlen(skb)) +
803 skb->len;
804 total_packets += segs;
805 total_bytes += bytecount;
806 }
807
808 igbvf_put_txbuf(adapter, buffer_info);
809 tx_desc->wb.status = 0;
810
811 i++;
812 if (i == tx_ring->count)
813 i = 0;
814 }
815 eop = tx_ring->buffer_info[i].next_to_watch;
816 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
817 }
818
819 tx_ring->next_to_clean = i;
820
821 if (unlikely(count &&
822 netif_carrier_ok(netdev) &&
823 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
824 /* Make sure that anybody stopping the queue after this
825 * sees the new next_to_clean.
826 */
827 smp_mb();
828 if (netif_queue_stopped(netdev) &&
829 !(test_bit(__IGBVF_DOWN, &adapter->state))) {
830 netif_wake_queue(netdev);
831 ++adapter->restart_queue;
832 }
833 }
834
d4e0fe01
AD		 835 adapter->net_stats.tx_bytes += total_bytes;
836 adapter->net_stats.tx_packets += total_packets;
807540ba 837 return count < tx_ring->count;
d4e0fe01
AD		 838}
839
840static irqreturn_t igbvf_msix_other(int irq, void *data)
841{
842 struct net_device *netdev = data;
843 struct igbvf_adapter *adapter = netdev_priv(netdev);
844 struct e1000_hw *hw = &adapter->hw;
845
846 adapter->int_counter1++;
847
848 netif_carrier_off(netdev);
849 hw->mac.get_link_status = 1;
850 if (!test_bit(__IGBVF_DOWN, &adapter->state))
851 mod_timer(&adapter->watchdog_timer, jiffies + 1);
852
853 ew32(EIMS, adapter->eims_other);
854
855 return IRQ_HANDLED;
856}
857
858static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
859{
860 struct net_device *netdev = data;
861 struct igbvf_adapter *adapter = netdev_priv(netdev);
862 struct e1000_hw *hw = &adapter->hw;
863 struct igbvf_ring *tx_ring = adapter->tx_ring;
864
ab50a2a4
MW		 865 if (tx_ring->set_itr) {
866 writel(tx_ring->itr_val,
867 adapter->hw.hw_addr + tx_ring->itr_register);
868 adapter->tx_ring->set_itr = 0;
869 }
d4e0fe01
AD		 870
871 adapter->total_tx_bytes = 0;
872 adapter->total_tx_packets = 0;
873
874 /* auto mask will automatically reenable the interrupt when we write
875 * EICS */
876 if (!igbvf_clean_tx_irq(tx_ring))
877 /* Ring was not completely cleaned, so fire another interrupt */
878 ew32(EICS, tx_ring->eims_value);
879 else
880 ew32(EIMS, tx_ring->eims_value);
881
882 return IRQ_HANDLED;
883}
884
885static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
886{
887 struct net_device *netdev = data;
888 struct igbvf_adapter *adapter = netdev_priv(netdev);
889
890 adapter->int_counter0++;
891
892 /* Write the ITR value calculated at the end of the
893 * previous interrupt.
894 */
895 if (adapter->rx_ring->set_itr) {
896 writel(adapter->rx_ring->itr_val,
897 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
898 adapter->rx_ring->set_itr = 0;
899 }
900
901 if (napi_schedule_prep(&adapter->rx_ring->napi)) {
902 adapter->total_rx_bytes = 0;
903 adapter->total_rx_packets = 0;
904 __napi_schedule(&adapter->rx_ring->napi);
905 }
906
907 return IRQ_HANDLED;
908}
909
910#define IGBVF_NO_QUEUE -1
911
912static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
913 int tx_queue, int msix_vector)
914{
915 struct e1000_hw *hw = &adapter->hw;
916 u32 ivar, index;
917
918 /* 82576 uses a table-based method for assigning vectors.
919 Each queue has a single entry in the table to which we write
920 a vector number along with a "valid" bit. Sadly, the layout
921 of the table is somewhat counterintuitive. */
922 if (rx_queue > IGBVF_NO_QUEUE) {
923 index = (rx_queue >> 1);
924 ivar = array_er32(IVAR0, index);
925 if (rx_queue & 0x1) {
926 /* vector goes into third byte of register */
927 ivar = ivar & 0xFF00FFFF;
928 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
929 } else {
930 /* vector goes into low byte of register */
931 ivar = ivar & 0xFFFFFF00;
932 ivar |= msix_vector | E1000_IVAR_VALID;
933 }
934 adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector;
935 array_ew32(IVAR0, index, ivar);
936 }
937 if (tx_queue > IGBVF_NO_QUEUE) {
938 index = (tx_queue >> 1);
939 ivar = array_er32(IVAR0, index);
940 if (tx_queue & 0x1) {
941 /* vector goes into high byte of register */
942 ivar = ivar & 0x00FFFFFF;
943 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
944 } else {
945 /* vector goes into second byte of register */
946 ivar = ivar & 0xFFFF00FF;
947 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
948 }
949 adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector;
950 array_ew32(IVAR0, index, ivar);
951 }
952}
953
954/**
955 * igbvf_configure_msix - Configure MSI-X hardware
956 *
957 * igbvf_configure_msix sets up the hardware to properly
958 * generate MSI-X interrupts.
959 **/
960static void igbvf_configure_msix(struct igbvf_adapter *adapter)
961{
962 u32 tmp;
963 struct e1000_hw *hw = &adapter->hw;
964 struct igbvf_ring *tx_ring = adapter->tx_ring;
965 struct igbvf_ring *rx_ring = adapter->rx_ring;
966 int vector = 0;
967
968 adapter->eims_enable_mask = 0;
969
970 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
971 adapter->eims_enable_mask |= tx_ring->eims_value;
ab50a2a4 972 writel(tx_ring->itr_val, hw->hw_addr + tx_ring->itr_register);
d4e0fe01
AD		 973 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
974 adapter->eims_enable_mask |= rx_ring->eims_value;
ab50a2a4 975 writel(rx_ring->itr_val, hw->hw_addr + rx_ring->itr_register);
d4e0fe01
AD		 976
977 /* set vector for other causes, i.e. link changes */
978
979 tmp = (vector++ | E1000_IVAR_VALID);
980
981 ew32(IVAR_MISC, tmp);
982
983 adapter->eims_enable_mask = (1 << (vector)) - 1;
984 adapter->eims_other = 1 << (vector - 1);
985 e1e_flush();
986}
987
2d165771 988static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
d4e0fe01
AD		 989{
990 if (adapter->msix_entries) {
991 pci_disable_msix(adapter->pdev);
992 kfree(adapter->msix_entries);
993 adapter->msix_entries = NULL;
994 }
995}
996
997/**
998 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
999 *
1000 * Attempt to configure interrupts using the best available
1001 * capabilities of the hardware and kernel.
1002 **/
2d165771 1003static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
d4e0fe01
AD		 1004{
1005 int err = -ENOMEM;
1006 int i;
1007
1008 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
1009 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
1010 GFP_KERNEL);
1011 if (adapter->msix_entries) {
1012 for (i = 0; i < 3; i++)
1013 adapter->msix_entries[i].entry = i;
1014
1015 err = pci_enable_msix(adapter->pdev,
1016 adapter->msix_entries, 3);
1017 }
1018
1019 if (err) {
1020 /* MSI-X failed */
1021 dev_err(&adapter->pdev->dev,
1022 "Failed to initialize MSI-X interrupts.\n");
1023 igbvf_reset_interrupt_capability(adapter);
1024 }
1025}
1026
1027/**
1028 * igbvf_request_msix - Initialize MSI-X interrupts
1029 *
1030 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1031 * kernel.
1032 **/
1033static int igbvf_request_msix(struct igbvf_adapter *adapter)
1034{
1035 struct net_device *netdev = adapter->netdev;
1036 int err = 0, vector = 0;
1037
1038 if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1039 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1040 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1041 } else {
1042 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1043 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1044 }
1045
1046 err = request_irq(adapter->msix_entries[vector].vector,
a0607fd3 1047 igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
d4e0fe01
AD		 1048 netdev);
1049 if (err)
1050 goto out;
1051
1052 adapter->tx_ring->itr_register = E1000_EITR(vector);
ab50a2a4 1053 adapter->tx_ring->itr_val = adapter->current_itr;
d4e0fe01
AD		 1054 vector++;
1055
1056 err = request_irq(adapter->msix_entries[vector].vector,
a0607fd3 1057 igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
d4e0fe01
AD		 1058 netdev);
1059 if (err)
1060 goto out;
1061
1062 adapter->rx_ring->itr_register = E1000_EITR(vector);
ab50a2a4 1063 adapter->rx_ring->itr_val = adapter->current_itr;
d4e0fe01
AD		 1064 vector++;
1065
1066 err = request_irq(adapter->msix_entries[vector].vector,
a0607fd3 1067 igbvf_msix_other, 0, netdev->name, netdev);
d4e0fe01
AD		 1068 if (err)
1069 goto out;
1070
1071 igbvf_configure_msix(adapter);
1072 return 0;
1073out:
1074 return err;
1075}
1076
1077/**
1078 * igbvf_alloc_queues - Allocate memory for all rings
1079 * @adapter: board private structure to initialize
1080 **/
1081static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter)
1082{
1083 struct net_device *netdev = adapter->netdev;
1084
1085 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1086 if (!adapter->tx_ring)
1087 return -ENOMEM;
1088
1089 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1090 if (!adapter->rx_ring) {
1091 kfree(adapter->tx_ring);
1092 return -ENOMEM;
1093 }
1094
1095 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1096
1097 return 0;
1098}
1099
1100/**
1101 * igbvf_request_irq - initialize interrupts
1102 *
1103 * Attempts to configure interrupts using the best available
1104 * capabilities of the hardware and kernel.
1105 **/
1106static int igbvf_request_irq(struct igbvf_adapter *adapter)
1107{
1108 int err = -1;
1109
1110 /* igbvf supports msi-x only */
1111 if (adapter->msix_entries)
1112 err = igbvf_request_msix(adapter);
1113
1114 if (!err)
1115 return err;
1116
1117 dev_err(&adapter->pdev->dev,
1118 "Unable to allocate interrupt, Error: %d\n", err);
1119
1120 return err;
1121}
1122
1123static void igbvf_free_irq(struct igbvf_adapter *adapter)
1124{
1125 struct net_device *netdev = adapter->netdev;
1126 int vector;
1127
1128 if (adapter->msix_entries) {
1129 for (vector = 0; vector < 3; vector++)
1130 free_irq(adapter->msix_entries[vector].vector, netdev);
1131 }
1132}
1133
1134/**
1135 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1136 **/
1137static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1138{
1139 struct e1000_hw *hw = &adapter->hw;
1140
1141 ew32(EIMC, ~0);
1142
1143 if (adapter->msix_entries)
1144 ew32(EIAC, 0);
1145}
1146
1147/**
1148 * igbvf_irq_enable - Enable default interrupt generation settings
1149 **/
1150static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1151{
1152 struct e1000_hw *hw = &adapter->hw;
1153
1154 ew32(EIAC, adapter->eims_enable_mask);
1155 ew32(EIAM, adapter->eims_enable_mask);
1156 ew32(EIMS, adapter->eims_enable_mask);
1157}
1158
1159/**
1160 * igbvf_poll - NAPI Rx polling callback
1161 * @napi: struct associated with this polling callback
1162 * @budget: amount of packets driver is allowed to process this poll
1163 **/
1164static int igbvf_poll(struct napi_struct *napi, int budget)
1165{
1166 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1167 struct igbvf_adapter *adapter = rx_ring->adapter;
1168 struct e1000_hw *hw = &adapter->hw;
1169 int work_done = 0;
1170
1171 igbvf_clean_rx_irq(adapter, &work_done, budget);
1172
1173 /* If not enough Rx work done, exit the polling mode */
1174 if (work_done < budget) {
1175 napi_complete(napi);
1176
ab50a2a4 1177 if (adapter->requested_itr & 3)
d4e0fe01
AD		 1178 igbvf_set_itr(adapter);
1179
1180 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1181 ew32(EIMS, adapter->rx_ring->eims_value);
1182 }
1183
1184 return work_done;
1185}
1186
1187/**
1188 * igbvf_set_rlpml - set receive large packet maximum length
1189 * @adapter: board private structure
1190 *
1191 * Configure the maximum size of packets that will be received
1192 */
1193static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1194{
a0f1d603 1195 int max_frame_size;
d4e0fe01
AD		 1196 struct e1000_hw *hw = &adapter->hw;
1197
a0f1d603 1198 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
d4e0fe01
AD		 1199 e1000_rlpml_set_vf(hw, max_frame_size);
1200}
1201
8e586137 1202static int igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
d4e0fe01
AD		 1203{
1204 struct igbvf_adapter *adapter = netdev_priv(netdev);
1205 struct e1000_hw *hw = &adapter->hw;
1206
8e586137 1207 if (hw->mac.ops.set_vfta(hw, vid, true)) {
d4e0fe01 1208 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
8e586137
JP		 1209 return -EINVAL;
1210 }
1211 set_bit(vid, adapter->active_vlans);
1212 return 0;
d4e0fe01
AD		 1213}
1214
8e586137 1215static int igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
d4e0fe01
AD		 1216{
1217 struct igbvf_adapter *adapter = netdev_priv(netdev);
1218 struct e1000_hw *hw = &adapter->hw;
1219
8e586137 1220 if (hw->mac.ops.set_vfta(hw, vid, false)) {
d4e0fe01
AD		 1221 dev_err(&adapter->pdev->dev,
1222 "Failed to remove vlan id %d\n", vid);
8e586137
JP		 1223 return -EINVAL;
1224 }
1225 clear_bit(vid, adapter->active_vlans);
1226 return 0;
d4e0fe01
AD		 1227}
1228
1229static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1230{
1231 u16 vid;
1232
a0f1d603 1233 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
d4e0fe01 1234 igbvf_vlan_rx_add_vid(adapter->netdev, vid);
d4e0fe01
AD		 1235}
1236
1237/**
1238 * igbvf_configure_tx - Configure Transmit Unit after Reset
1239 * @adapter: board private structure
1240 *
1241 * Configure the Tx unit of the MAC after a reset.
1242 **/
1243static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1244{
1245 struct e1000_hw *hw = &adapter->hw;
1246 struct igbvf_ring *tx_ring = adapter->tx_ring;
1247 u64 tdba;
1248 u32 txdctl, dca_txctrl;
1249
1250 /* disable transmits */
1251 txdctl = er32(TXDCTL(0));
1252 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
945a5151 1253 e1e_flush();
d4e0fe01
AD		 1254 msleep(10);
1255
1256 /* Setup the HW Tx Head and Tail descriptor pointers */
1257 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1258 tdba = tx_ring->dma;
8e20ce94 1259 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
d4e0fe01
AD		 1260 ew32(TDBAH(0), (tdba >> 32));
1261 ew32(TDH(0), 0);
1262 ew32(TDT(0), 0);
1263 tx_ring->head = E1000_TDH(0);
1264 tx_ring->tail = E1000_TDT(0);
1265
1266 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1267 * MUST be delivered in order or it will completely screw up
1268 * our bookeeping.
1269 */
1270 dca_txctrl = er32(DCA_TXCTRL(0));
1271 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1272 ew32(DCA_TXCTRL(0), dca_txctrl);
1273
1274 /* enable transmits */
1275 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1276 ew32(TXDCTL(0), txdctl);
1277
1278 /* Setup Transmit Descriptor Settings for eop descriptor */
1279 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1280
1281 /* enable Report Status bit */
1282 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
d4e0fe01
AD		 1283}
1284
1285/**
1286 * igbvf_setup_srrctl - configure the receive control registers
1287 * @adapter: Board private structure
1288 **/
1289static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1290{
1291 struct e1000_hw *hw = &adapter->hw;
1292 u32 srrctl = 0;
1293
1294 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1295 E1000_SRRCTL_BSIZEHDR_MASK |
1296 E1000_SRRCTL_BSIZEPKT_MASK);
1297
1298 /* Enable queue drop to avoid head of line blocking */
1299 srrctl |= E1000_SRRCTL_DROP_EN;
1300
1301 /* Setup buffer sizes */
1302 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1303 E1000_SRRCTL_BSIZEPKT_SHIFT;
1304
1305 if (adapter->rx_buffer_len < 2048) {
1306 adapter->rx_ps_hdr_size = 0;
1307 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1308 } else {
1309 adapter->rx_ps_hdr_size = 128;
1310 srrctl |= adapter->rx_ps_hdr_size <<
1311 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1312 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1313 }
1314
1315 ew32(SRRCTL(0), srrctl);
1316}
1317
1318/**
1319 * igbvf_configure_rx - Configure Receive Unit after Reset
1320 * @adapter: board private structure
1321 *
1322 * Configure the Rx unit of the MAC after a reset.
1323 **/
1324static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1325{
1326 struct e1000_hw *hw = &adapter->hw;
1327 struct igbvf_ring *rx_ring = adapter->rx_ring;
1328 u64 rdba;
1329 u32 rdlen, rxdctl;
1330
1331 /* disable receives */
1332 rxdctl = er32(RXDCTL(0));
1333 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
945a5151 1334 e1e_flush();
d4e0fe01
AD		 1335 msleep(10);
1336
1337 rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc);
1338
1339 /*
1340 * Setup the HW Rx Head and Tail Descriptor Pointers and
1341 * the Base and Length of the Rx Descriptor Ring
1342 */
1343 rdba = rx_ring->dma;
8e20ce94 1344 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
d4e0fe01
AD		 1345 ew32(RDBAH(0), (rdba >> 32));
1346 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1347 rx_ring->head = E1000_RDH(0);
1348 rx_ring->tail = E1000_RDT(0);
1349 ew32(RDH(0), 0);
1350 ew32(RDT(0), 0);
1351
1352 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1353 rxdctl &= 0xFFF00000;
1354 rxdctl |= IGBVF_RX_PTHRESH;
1355 rxdctl |= IGBVF_RX_HTHRESH << 8;
1356 rxdctl |= IGBVF_RX_WTHRESH << 16;
1357
1358 igbvf_set_rlpml(adapter);
1359
1360 /* enable receives */
1361 ew32(RXDCTL(0), rxdctl);
1362}
1363
1364/**
1365 * igbvf_set_multi - Multicast and Promiscuous mode set
1366 * @netdev: network interface device structure
1367 *
1368 * The set_multi entry point is called whenever the multicast address
1369 * list or the network interface flags are updated. This routine is
1370 * responsible for configuring the hardware for proper multicast,
1371 * promiscuous mode, and all-multi behavior.
1372 **/
1373static void igbvf_set_multi(struct net_device *netdev)
1374{
1375 struct igbvf_adapter *adapter = netdev_priv(netdev);
1376 struct e1000_hw *hw = &adapter->hw;
22bedad3 1377 struct netdev_hw_addr *ha;
d4e0fe01
AD		 1378 u8 *mta_list = NULL;
1379 int i;
1380
4cd24eaf
JP		 1381 if (!netdev_mc_empty(netdev)) {
1382 mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
d4e0fe01
AD		 1383 if (!mta_list) {
1384 dev_err(&adapter->pdev->dev,
1385 "failed to allocate multicast filter list\n");
1386 return;
1387 }
1388 }
1389
1390 /* prepare a packed array of only addresses. */
48e2f183 1391 i = 0;
22bedad3
JP		 1392 netdev_for_each_mc_addr(ha, netdev)
1393 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
d4e0fe01
AD		 1394
1395 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1396 kfree(mta_list);
1397}
1398
1399/**
1400 * igbvf_configure - configure the hardware for Rx and Tx
1401 * @adapter: private board structure
1402 **/
1403static void igbvf_configure(struct igbvf_adapter *adapter)
1404{
1405 igbvf_set_multi(adapter->netdev);
1406
1407 igbvf_restore_vlan(adapter);
1408
1409 igbvf_configure_tx(adapter);
1410 igbvf_setup_srrctl(adapter);
1411 igbvf_configure_rx(adapter);
1412 igbvf_alloc_rx_buffers(adapter->rx_ring,
1413 igbvf_desc_unused(adapter->rx_ring));
1414}
1415
1416/* igbvf_reset - bring the hardware into a known good state
1417 *
1418 * This function boots the hardware and enables some settings that
1419 * require a configuration cycle of the hardware - those cannot be
1420 * set/changed during runtime. After reset the device needs to be
1421 * properly configured for Rx, Tx etc.
1422 */
2d165771 1423static void igbvf_reset(struct igbvf_adapter *adapter)
d4e0fe01
AD		 1424{
1425 struct e1000_mac_info *mac = &adapter->hw.mac;
1426 struct net_device *netdev = adapter->netdev;
1427 struct e1000_hw *hw = &adapter->hw;
1428
1429 /* Allow time for pending master requests to run */
1430 if (mac->ops.reset_hw(hw))
1431 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1432
1433 mac->ops.init_hw(hw);
1434
1435 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1436 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1437 netdev->addr_len);
1438 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1439 netdev->addr_len);
1440 }
72279093
AD		 1441
1442 adapter->last_reset = jiffies;
d4e0fe01
AD		 1443}
1444
1445int igbvf_up(struct igbvf_adapter *adapter)
1446{
1447 struct e1000_hw *hw = &adapter->hw;
1448
1449 /* hardware has been reset, we need to reload some things */
1450 igbvf_configure(adapter);
1451
1452 clear_bit(__IGBVF_DOWN, &adapter->state);
1453
1454 napi_enable(&adapter->rx_ring->napi);
1455 if (adapter->msix_entries)
1456 igbvf_configure_msix(adapter);
1457
1458 /* Clear any pending interrupts. */
1459 er32(EICR);
1460 igbvf_irq_enable(adapter);
1461
1462 /* start the watchdog */
1463 hw->mac.get_link_status = 1;
1464 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1465
1466
1467 return 0;
1468}
1469
1470void igbvf_down(struct igbvf_adapter *adapter)
1471{
1472 struct net_device *netdev = adapter->netdev;
1473 struct e1000_hw *hw = &adapter->hw;
1474 u32 rxdctl, txdctl;
1475
1476 /*
1477 * signal that we're down so the interrupt handler does not
1478 * reschedule our watchdog timer
1479 */
1480 set_bit(__IGBVF_DOWN, &adapter->state);
1481
1482 /* disable receives in the hardware */
1483 rxdctl = er32(RXDCTL(0));
1484 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1485
1486 netif_stop_queue(netdev);
1487
1488 /* disable transmits in the hardware */
1489 txdctl = er32(TXDCTL(0));
1490 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1491
1492 /* flush both disables and wait for them to finish */
1493 e1e_flush();
1494 msleep(10);
1495
1496 napi_disable(&adapter->rx_ring->napi);
1497
1498 igbvf_irq_disable(adapter);
1499
1500 del_timer_sync(&adapter->watchdog_timer);
1501
d4e0fe01
AD		 1502 netif_carrier_off(netdev);
1503
1504 /* record the stats before reset*/
1505 igbvf_update_stats(adapter);
1506
1507 adapter->link_speed = 0;
1508 adapter->link_duplex = 0;
1509
1510 igbvf_reset(adapter);
1511 igbvf_clean_tx_ring(adapter->tx_ring);
1512 igbvf_clean_rx_ring(adapter->rx_ring);
1513}
1514
1515void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1516{
1517 might_sleep();
1518 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1519 msleep(1);
1520 igbvf_down(adapter);
1521 igbvf_up(adapter);
1522 clear_bit(__IGBVF_RESETTING, &adapter->state);
1523}
1524
1525/**
1526 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1527 * @adapter: board private structure to initialize
1528 *
1529 * igbvf_sw_init initializes the Adapter private data structure.
1530 * Fields are initialized based on PCI device information and
1531 * OS network device settings (MTU size).
1532 **/
1533static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter)
1534{
1535 struct net_device *netdev = adapter->netdev;
1536 s32 rc;
1537
1538 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1539 adapter->rx_ps_hdr_size = 0;
1540 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1541 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1542
1543 adapter->tx_int_delay = 8;
1544 adapter->tx_abs_int_delay = 32;
1545 adapter->rx_int_delay = 0;
1546 adapter->rx_abs_int_delay = 8;
ab50a2a4
MW		 1547 adapter->requested_itr = 3;
1548 adapter->current_itr = IGBVF_START_ITR;
d4e0fe01
AD		 1549
1550 /* Set various function pointers */
1551 adapter->ei->init_ops(&adapter->hw);
1552
1553 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1554 if (rc)
1555 return rc;
1556
1557 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1558 if (rc)
1559 return rc;
1560
1561 igbvf_set_interrupt_capability(adapter);
1562
1563 if (igbvf_alloc_queues(adapter))
1564 return -ENOMEM;
1565
1566 spin_lock_init(&adapter->tx_queue_lock);
1567
1568 /* Explicitly disable IRQ since the NIC can be in any state. */
1569 igbvf_irq_disable(adapter);
1570
1571 spin_lock_init(&adapter->stats_lock);
1572
1573 set_bit(__IGBVF_DOWN, &adapter->state);
1574 return 0;
1575}
1576
1577static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1578{
1579 struct e1000_hw *hw = &adapter->hw;
1580
1581 adapter->stats.last_gprc = er32(VFGPRC);
1582 adapter->stats.last_gorc = er32(VFGORC);
1583 adapter->stats.last_gptc = er32(VFGPTC);
1584 adapter->stats.last_gotc = er32(VFGOTC);
1585 adapter->stats.last_mprc = er32(VFMPRC);
1586 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1587 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1588 adapter->stats.last_gorlbc = er32(VFGORLBC);
1589 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1590
1591 adapter->stats.base_gprc = er32(VFGPRC);
1592 adapter->stats.base_gorc = er32(VFGORC);
1593 adapter->stats.base_gptc = er32(VFGPTC);
1594 adapter->stats.base_gotc = er32(VFGOTC);
1595 adapter->stats.base_mprc = er32(VFMPRC);
1596 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1597 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1598 adapter->stats.base_gorlbc = er32(VFGORLBC);
1599 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1600}
1601
1602/**
1603 * igbvf_open - Called when a network interface is made active
1604 * @netdev: network interface device structure
1605 *
1606 * Returns 0 on success, negative value on failure
1607 *
1608 * The open entry point is called when a network interface is made
1609 * active by the system (IFF_UP). At this point all resources needed
1610 * for transmit and receive operations are allocated, the interrupt
1611 * handler is registered with the OS, the watchdog timer is started,
1612 * and the stack is notified that the interface is ready.
1613 **/
1614static int igbvf_open(struct net_device *netdev)
1615{
1616 struct igbvf_adapter *adapter = netdev_priv(netdev);
1617 struct e1000_hw *hw = &adapter->hw;
1618 int err;
1619
1620 /* disallow open during test */
1621 if (test_bit(__IGBVF_TESTING, &adapter->state))
1622 return -EBUSY;
1623
1624 /* allocate transmit descriptors */
1625 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1626 if (err)
1627 goto err_setup_tx;
1628
1629 /* allocate receive descriptors */
1630 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1631 if (err)
1632 goto err_setup_rx;
1633
1634 /*
1635 * before we allocate an interrupt, we must be ready to handle it.
1636 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1637 * as soon as we call pci_request_irq, so we have to setup our
1638 * clean_rx handler before we do so.
1639 */
1640 igbvf_configure(adapter);
1641
1642 err = igbvf_request_irq(adapter);
1643 if (err)
1644 goto err_req_irq;
1645
1646 /* From here on the code is the same as igbvf_up() */
1647 clear_bit(__IGBVF_DOWN, &adapter->state);
1648
1649 napi_enable(&adapter->rx_ring->napi);
1650
1651 /* clear any pending interrupts */
1652 er32(EICR);
1653
1654 igbvf_irq_enable(adapter);
1655
1656 /* start the watchdog */
1657 hw->mac.get_link_status = 1;
1658 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1659
1660 return 0;
1661
1662err_req_irq:
1663 igbvf_free_rx_resources(adapter->rx_ring);
1664err_setup_rx:
1665 igbvf_free_tx_resources(adapter->tx_ring);
1666err_setup_tx:
1667 igbvf_reset(adapter);
1668
1669 return err;
1670}
1671
1672/**
1673 * igbvf_close - Disables a network interface
1674 * @netdev: network interface device structure
1675 *
1676 * Returns 0, this is not allowed to fail
1677 *
1678 * The close entry point is called when an interface is de-activated
1679 * by the OS. The hardware is still under the drivers control, but
1680 * needs to be disabled. A global MAC reset is issued to stop the
1681 * hardware, and all transmit and receive resources are freed.
1682 **/
1683static int igbvf_close(struct net_device *netdev)
1684{
1685 struct igbvf_adapter *adapter = netdev_priv(netdev);
1686
1687 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1688 igbvf_down(adapter);
1689
1690 igbvf_free_irq(adapter);
1691
1692 igbvf_free_tx_resources(adapter->tx_ring);
1693 igbvf_free_rx_resources(adapter->rx_ring);
1694
1695 return 0;
1696}
1697/**
1698 * igbvf_set_mac - Change the Ethernet Address of the NIC
1699 * @netdev: network interface device structure
1700 * @p: pointer to an address structure
1701 *
1702 * Returns 0 on success, negative on failure
1703 **/
1704static int igbvf_set_mac(struct net_device *netdev, void *p)
1705{
1706 struct igbvf_adapter *adapter = netdev_priv(netdev);
1707 struct e1000_hw *hw = &adapter->hw;
1708 struct sockaddr *addr = p;
1709
1710 if (!is_valid_ether_addr(addr->sa_data))
1711 return -EADDRNOTAVAIL;
1712
1713 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1714
1715 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1716
1717 if (memcmp(addr->sa_data, hw->mac.addr, 6))
1718 return -EADDRNOTAVAIL;
1719
1720 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
067fb4c8 1721 netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
d4e0fe01
AD		 1722
1723 return 0;
1724}
1725
1726#define UPDATE_VF_COUNTER(reg, name) \
1727 { \
1728 u32 current_counter = er32(reg); \
1729 if (current_counter < adapter->stats.last_##name) \
1730 adapter->stats.name += 0x100000000LL; \
1731 adapter->stats.last_##name = current_counter; \
1732 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1733 adapter->stats.name |= current_counter; \
1734 }
1735
1736/**
1737 * igbvf_update_stats - Update the board statistics counters
1738 * @adapter: board private structure
1739**/
1740void igbvf_update_stats(struct igbvf_adapter *adapter)
1741{
1742 struct e1000_hw *hw = &adapter->hw;
1743 struct pci_dev *pdev = adapter->pdev;
1744
1745 /*
1746 * Prevent stats update while adapter is being reset, link is down
1747 * or if the pci connection is down.
1748 */
1749 if (adapter->link_speed == 0)
1750 return;
1751
1752 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1753 return;
1754
1755 if (pci_channel_offline(pdev))
1756 return;
1757
1758 UPDATE_VF_COUNTER(VFGPRC, gprc);
1759 UPDATE_VF_COUNTER(VFGORC, gorc);
1760 UPDATE_VF_COUNTER(VFGPTC, gptc);
1761 UPDATE_VF_COUNTER(VFGOTC, gotc);
1762 UPDATE_VF_COUNTER(VFMPRC, mprc);
1763 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1764 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1765 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1766 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1767
1768 /* Fill out the OS statistics structure */
1769 adapter->net_stats.multicast = adapter->stats.mprc;
1770}
1771
1772static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1773{
a4ba8cbe
JK		 1774 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n",
1775 adapter->link_speed,
1776 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half");
d4e0fe01
AD		 1777}
1778
1779static bool igbvf_has_link(struct igbvf_adapter *adapter)
1780{
1781 struct e1000_hw *hw = &adapter->hw;
1782 s32 ret_val = E1000_SUCCESS;
1783 bool link_active;
1784
72279093
AD		 1785 /* If interface is down, stay link down */
1786 if (test_bit(__IGBVF_DOWN, &adapter->state))
1787 return false;
1788
d4e0fe01
AD		 1789 ret_val = hw->mac.ops.check_for_link(hw);
1790 link_active = !hw->mac.get_link_status;
1791
1792 /* if check for link returns error we will need to reset */
72279093 1793 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
d4e0fe01
AD		 1794 schedule_work(&adapter->reset_task);
1795
1796 return link_active;
1797}
1798
1799/**
1800 * igbvf_watchdog - Timer Call-back
1801 * @data: pointer to adapter cast into an unsigned long
1802 **/
1803static void igbvf_watchdog(unsigned long data)
1804{
1805 struct igbvf_adapter *adapter = (struct igbvf_adapter *) data;
1806
1807 /* Do the rest outside of interrupt context */
1808 schedule_work(&adapter->watchdog_task);
1809}
1810
1811static void igbvf_watchdog_task(struct work_struct *work)
1812{
1813 struct igbvf_adapter *adapter = container_of(work,
1814 struct igbvf_adapter,
1815 watchdog_task);
1816 struct net_device *netdev = adapter->netdev;
1817 struct e1000_mac_info *mac = &adapter->hw.mac;
1818 struct igbvf_ring *tx_ring = adapter->tx_ring;
1819 struct e1000_hw *hw = &adapter->hw;
1820 u32 link;
1821 int tx_pending = 0;
1822
1823 link = igbvf_has_link(adapter);
1824
1825 if (link) {
1826 if (!netif_carrier_ok(netdev)) {
d4e0fe01
AD		 1827 mac->ops.get_link_up_info(&adapter->hw,
1828 &adapter->link_speed,
1829 &adapter->link_duplex);
1830 igbvf_print_link_info(adapter);
1831
d4e0fe01
AD		 1832 netif_carrier_on(netdev);
1833 netif_wake_queue(netdev);
1834 }
1835 } else {
1836 if (netif_carrier_ok(netdev)) {
1837 adapter->link_speed = 0;
1838 adapter->link_duplex = 0;
1839 dev_info(&adapter->pdev->dev, "Link is Down\n");
1840 netif_carrier_off(netdev);
1841 netif_stop_queue(netdev);
1842 }
1843 }
1844
1845 if (netif_carrier_ok(netdev)) {
1846 igbvf_update_stats(adapter);
1847 } else {
1848 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1849 tx_ring->count);
1850 if (tx_pending) {
1851 /*
1852 * We've lost link, so the controller stops DMA,
1853 * but we've got queued Tx work that's never going
1854 * to get done, so reset controller to flush Tx.
1855 * (Do the reset outside of interrupt context).
1856 */
1857 adapter->tx_timeout_count++;
1858 schedule_work(&adapter->reset_task);
1859 }
1860 }
1861
1862 /* Cause software interrupt to ensure Rx ring is cleaned */
1863 ew32(EICS, adapter->rx_ring->eims_value);
1864
d4e0fe01
AD		 1865 /* Reset the timer */
1866 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1867 mod_timer(&adapter->watchdog_timer,
1868 round_jiffies(jiffies + (2 * HZ)));
1869}
1870
1871#define IGBVF_TX_FLAGS_CSUM 0x00000001
1872#define IGBVF_TX_FLAGS_VLAN 0x00000002
1873#define IGBVF_TX_FLAGS_TSO 0x00000004
1874#define IGBVF_TX_FLAGS_IPV4 0x00000008
1875#define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1876#define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1877
1878static int igbvf_tso(struct igbvf_adapter *adapter,
1879 struct igbvf_ring *tx_ring,
1880 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
1881{
1882 struct e1000_adv_tx_context_desc *context_desc;
1883 unsigned int i;
1884 int err;
1885 struct igbvf_buffer *buffer_info;
1886 u32 info = 0, tu_cmd = 0;
1887 u32 mss_l4len_idx, l4len;
1888 *hdr_len = 0;
1889
1890 if (skb_header_cloned(skb)) {
1891 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1892 if (err) {
1893 dev_err(&adapter->pdev->dev,
1894 "igbvf_tso returning an error\n");
1895 return err;
1896 }
1897 }
1898
1899 l4len = tcp_hdrlen(skb);
1900 *hdr_len += l4len;
1901
1902 if (skb->protocol == htons(ETH_P_IP)) {
1903 struct iphdr *iph = ip_hdr(skb);
1904 iph->tot_len = 0;
1905 iph->check = 0;
1906 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1907 iph->daddr, 0,
1908 IPPROTO_TCP,
1909 0);
8e1e8a47 1910 } else if (skb_is_gso_v6(skb)) {
d4e0fe01
AD		 1911 ipv6_hdr(skb)->payload_len = 0;
1912 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
1913 &ipv6_hdr(skb)->daddr,
1914 0, IPPROTO_TCP, 0);
1915 }
1916
1917 i = tx_ring->next_to_use;
1918
1919 buffer_info = &tx_ring->buffer_info[i];
1920 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1921 /* VLAN MACLEN IPLEN */
1922 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1923 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1924 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1925 *hdr_len += skb_network_offset(skb);
1926 info |= (skb_transport_header(skb) - skb_network_header(skb));
1927 *hdr_len += (skb_transport_header(skb) - skb_network_header(skb));
1928 context_desc->vlan_macip_lens = cpu_to_le32(info);
1929
1930 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1931 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1932
1933 if (skb->protocol == htons(ETH_P_IP))
1934 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1935 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1936
1937 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1938
1939 /* MSS L4LEN IDX */
1940 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
1941 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
1942
1943 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1944 context_desc->seqnum_seed = 0;
1945
1946 buffer_info->time_stamp = jiffies;
1947 buffer_info->next_to_watch = i;
1948 buffer_info->dma = 0;
1949 i++;
1950 if (i == tx_ring->count)
1951 i = 0;
1952
1953 tx_ring->next_to_use = i;
1954
1955 return true;
1956}
1957
1958static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter,
1959 struct igbvf_ring *tx_ring,
1960 struct sk_buff *skb, u32 tx_flags)
1961{
1962 struct e1000_adv_tx_context_desc *context_desc;
1963 unsigned int i;
1964 struct igbvf_buffer *buffer_info;
1965 u32 info = 0, tu_cmd = 0;
1966
1967 if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
1968 (tx_flags & IGBVF_TX_FLAGS_VLAN)) {
1969 i = tx_ring->next_to_use;
1970 buffer_info = &tx_ring->buffer_info[i];
1971 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1972
1973 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1974 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1975
1976 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1977 if (skb->ip_summed == CHECKSUM_PARTIAL)
1978 info |= (skb_transport_header(skb) -
1979 skb_network_header(skb));
1980
1981
1982 context_desc->vlan_macip_lens = cpu_to_le32(info);
1983
1984 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1985
1986 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1987 switch (skb->protocol) {
1988 case __constant_htons(ETH_P_IP):
1989 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1990 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1991 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1992 break;
1993 case __constant_htons(ETH_P_IPV6):
1994 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1995 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1996 break;
1997 default:
1998 break;
1999 }
2000 }
2001
2002 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
2003 context_desc->seqnum_seed = 0;
2004 context_desc->mss_l4len_idx = 0;
2005
2006 buffer_info->time_stamp = jiffies;
2007 buffer_info->next_to_watch = i;
2008 buffer_info->dma = 0;
2009 i++;
2010 if (i == tx_ring->count)
2011 i = 0;
2012 tx_ring->next_to_use = i;
2013
2014 return true;
2015 }
2016
2017 return false;
2018}
2019
2020static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2021{
2022 struct igbvf_adapter *adapter = netdev_priv(netdev);
2023
2024 /* there is enough descriptors then we don't need to worry */
2025 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2026 return 0;
2027
2028 netif_stop_queue(netdev);
2029
2030 smp_mb();
2031
2032 /* We need to check again just in case room has been made available */
2033 if (igbvf_desc_unused(adapter->tx_ring) < size)
2034 return -EBUSY;
2035
2036 netif_wake_queue(netdev);
2037
2038 ++adapter->restart_queue;
2039 return 0;
2040}
2041
2042#define IGBVF_MAX_TXD_PWR 16
2043#define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2044
2045static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2046 struct igbvf_ring *tx_ring,
2047 struct sk_buff *skb,
2048 unsigned int first)
2049{
2050 struct igbvf_buffer *buffer_info;
a7d5ca40 2051 struct pci_dev *pdev = adapter->pdev;
d4e0fe01
AD		 2052 unsigned int len = skb_headlen(skb);
2053 unsigned int count = 0, i;
2054 unsigned int f;
d4e0fe01
AD		 2055
2056 i = tx_ring->next_to_use;
2057
d4e0fe01
AD		 2058 buffer_info = &tx_ring->buffer_info[i];
2059 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2060 buffer_info->length = len;
2061 /* set time_stamp *before* dma to help avoid a possible race */
2062 buffer_info->time_stamp = jiffies;
2063 buffer_info->next_to_watch = i;
ac26d7d6 2064 buffer_info->mapped_as_page = false;
123e9f1a
NN		 2065 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2066 DMA_TO_DEVICE);
2067 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
a7d5ca40
AD		 2068 goto dma_error;
2069
d4e0fe01
AD		 2070
2071 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
9e903e08 2072 const struct skb_frag_struct *frag;
d4e0fe01 2073
8581145f 2074 count++;
d4e0fe01
AD		 2075 i++;
2076 if (i == tx_ring->count)
2077 i = 0;
2078
2079 frag = &skb_shinfo(skb)->frags[f];
9e903e08 2080 len = skb_frag_size(frag);
d4e0fe01
AD		 2081
2082 buffer_info = &tx_ring->buffer_info[i];
2083 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2084 buffer_info->length = len;
2085 buffer_info->time_stamp = jiffies;
2086 buffer_info->next_to_watch = i;
a7d5ca40 2087 buffer_info->mapped_as_page = true;
877749bf 2088 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len,
123e9f1a
NN		 2089 DMA_TO_DEVICE);
2090 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
a7d5ca40 2091 goto dma_error;
d4e0fe01
AD		 2092 }
2093
2094 tx_ring->buffer_info[i].skb = skb;
2095 tx_ring->buffer_info[first].next_to_watch = i;
2096
a7d5ca40
AD		 2097 return ++count;
2098
2099dma_error:
2100 dev_err(&pdev->dev, "TX DMA map failed\n");
2101
2102 /* clear timestamp and dma mappings for failed buffer_info mapping */
2103 buffer_info->dma = 0;
2104 buffer_info->time_stamp = 0;
2105 buffer_info->length = 0;
2106 buffer_info->next_to_watch = 0;
2107 buffer_info->mapped_as_page = false;
c1fa347f
RK		 2108 if (count)
2109 count--;
a7d5ca40
AD		 2110
2111 /* clear timestamp and dma mappings for remaining portion of packet */
c1fa347f
RK		 2112 while (count--) {
2113 if (i==0)
a7d5ca40 2114 i += tx_ring->count;
c1fa347f 2115 i--;
a7d5ca40
AD		 2116 buffer_info = &tx_ring->buffer_info[i];
2117 igbvf_put_txbuf(adapter, buffer_info);
2118 }
2119
2120 return 0;
d4e0fe01
AD		 2121}
2122
2123static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2124 struct igbvf_ring *tx_ring,
2125 int tx_flags, int count, u32 paylen,
2126 u8 hdr_len)
2127{
2128 union e1000_adv_tx_desc *tx_desc = NULL;
2129 struct igbvf_buffer *buffer_info;
2130 u32 olinfo_status = 0, cmd_type_len;
2131 unsigned int i;
2132
2133 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2134 E1000_ADVTXD_DCMD_DEXT);
2135
2136 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2137 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2138
2139 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2140 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2141
2142 /* insert tcp checksum */
2143 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2144
2145 /* insert ip checksum */
2146 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2147 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2148
2149 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2150 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2151 }
2152
2153 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2154
2155 i = tx_ring->next_to_use;
2156 while (count--) {
2157 buffer_info = &tx_ring->buffer_info[i];
2158 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2159 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2160 tx_desc->read.cmd_type_len =
2161 cpu_to_le32(cmd_type_len | buffer_info->length);
2162 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2163 i++;
2164 if (i == tx_ring->count)
2165 i = 0;
2166 }
2167
2168 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2169 /* Force memory writes to complete before letting h/w
2170 * know there are new descriptors to fetch. (Only
2171 * applicable for weak-ordered memory model archs,
2172 * such as IA-64). */
2173 wmb();
2174
2175 tx_ring->next_to_use = i;
2176 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2177 /* we need this if more than one processor can write to our tail
2178 * at a time, it syncronizes IO on IA64/Altix systems */
2179 mmiowb();
2180}
2181
3b29a56d
SH		 2182static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2183 struct net_device *netdev,
2184 struct igbvf_ring *tx_ring)
d4e0fe01
AD		 2185{
2186 struct igbvf_adapter *adapter = netdev_priv(netdev);
2187 unsigned int first, tx_flags = 0;
2188 u8 hdr_len = 0;
2189 int count = 0;
2190 int tso = 0;
2191
2192 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2193 dev_kfree_skb_any(skb);
2194 return NETDEV_TX_OK;
2195 }
2196
2197 if (skb->len <= 0) {
2198 dev_kfree_skb_any(skb);
2199 return NETDEV_TX_OK;
2200 }
2201
2202 /*
2203 * need: count + 4 desc gap to keep tail from touching
2204 * + 2 desc gap to keep tail from touching head,
2205 * + 1 desc for skb->data,
2206 * + 1 desc for context descriptor,
2207 * head, otherwise try next time
2208 */
2209 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2210 /* this is a hard error */
2211 return NETDEV_TX_BUSY;
2212 }
2213
a0f1d603 2214 if (vlan_tx_tag_present(skb)) {
d4e0fe01
AD		 2215 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2216 tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT);
2217 }
2218
2219 if (skb->protocol == htons(ETH_P_IP))
2220 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2221
2222 first = tx_ring->next_to_use;
2223
2224 tso = skb_is_gso(skb) ?
2225 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0;
2226 if (unlikely(tso < 0)) {
2227 dev_kfree_skb_any(skb);
2228 return NETDEV_TX_OK;
2229 }
2230
2231 if (tso)
2232 tx_flags |= IGBVF_TX_FLAGS_TSO;
2233 else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
2234 (skb->ip_summed == CHECKSUM_PARTIAL))
2235 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2236
2237 /*
2238 * count reflects descriptors mapped, if 0 then mapping error
25985edc 2239 * has occurred and we need to rewind the descriptor queue
d4e0fe01
AD		 2240 */
2241 count = igbvf_tx_map_adv(adapter, tx_ring, skb, first);
2242
2243 if (count) {
2244 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2245 skb->len, hdr_len);
d4e0fe01
AD		 2246 /* Make sure there is space in the ring for the next send. */
2247 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2248 } else {
2249 dev_kfree_skb_any(skb);
2250 tx_ring->buffer_info[first].time_stamp = 0;
2251 tx_ring->next_to_use = first;
2252 }
2253
2254 return NETDEV_TX_OK;
2255}
2256
3b29a56d
SH		 2257static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2258 struct net_device *netdev)
d4e0fe01
AD		 2259{
2260 struct igbvf_adapter *adapter = netdev_priv(netdev);
2261 struct igbvf_ring *tx_ring;
d4e0fe01
AD		 2262
2263 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2264 dev_kfree_skb_any(skb);
2265 return NETDEV_TX_OK;
2266 }
2267
2268 tx_ring = &adapter->tx_ring[0];
2269
3b29a56d 2270 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
d4e0fe01
AD		 2271}
2272
2273/**
2274 * igbvf_tx_timeout - Respond to a Tx Hang
2275 * @netdev: network interface device structure
2276 **/
2277static void igbvf_tx_timeout(struct net_device *netdev)
2278{
2279 struct igbvf_adapter *adapter = netdev_priv(netdev);
2280
2281 /* Do the reset outside of interrupt context */
2282 adapter->tx_timeout_count++;
2283 schedule_work(&adapter->reset_task);
2284}
2285
2286static void igbvf_reset_task(struct work_struct *work)
2287{
2288 struct igbvf_adapter *adapter;
2289 adapter = container_of(work, struct igbvf_adapter, reset_task);
2290
2291 igbvf_reinit_locked(adapter);
2292}
2293
2294/**
2295 * igbvf_get_stats - Get System Network Statistics
2296 * @netdev: network interface device structure
2297 *
2298 * Returns the address of the device statistics structure.
2299 * The statistics are actually updated from the timer callback.
2300 **/
2301static struct net_device_stats *igbvf_get_stats(struct net_device *netdev)
2302{
2303 struct igbvf_adapter *adapter = netdev_priv(netdev);
2304
2305 /* only return the current stats */
2306 return &adapter->net_stats;
2307}
2308
2309/**
2310 * igbvf_change_mtu - Change the Maximum Transfer Unit
2311 * @netdev: network interface device structure
2312 * @new_mtu: new value for maximum frame size
2313 *
2314 * Returns 0 on success, negative on failure
2315 **/
2316static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2317{
2318 struct igbvf_adapter *adapter = netdev_priv(netdev);
2319 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2320
2321 if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2322 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n");
2323 return -EINVAL;
2324 }
2325
d4e0fe01
AD		 2326#define MAX_STD_JUMBO_FRAME_SIZE 9234
2327 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2328 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
2329 return -EINVAL;
2330 }
2331
2332 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2333 msleep(1);
2334 /* igbvf_down has a dependency on max_frame_size */
2335 adapter->max_frame_size = max_frame;
2336 if (netif_running(netdev))
2337 igbvf_down(adapter);
2338
2339 /*
2340 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2341 * means we reserve 2 more, this pushes us to allocate from the next
2342 * larger slab size.
2343 * i.e. RXBUFFER_2048 --> size-4096 slab
2344 * However with the new *_jumbo_rx* routines, jumbo receives will use
2345 * fragmented skbs
2346 */
2347
2348 if (max_frame <= 1024)
2349 adapter->rx_buffer_len = 1024;
2350 else if (max_frame <= 2048)
2351 adapter->rx_buffer_len = 2048;
2352 else
2353#if (PAGE_SIZE / 2) > 16384
2354 adapter->rx_buffer_len = 16384;
2355#else
2356 adapter->rx_buffer_len = PAGE_SIZE / 2;
2357#endif
2358
2359
2360 /* adjust allocation if LPE protects us, and we aren't using SBP */
2361 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2362 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2363 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2364 ETH_FCS_LEN;
2365
2366 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
2367 netdev->mtu, new_mtu);
2368 netdev->mtu = new_mtu;
2369
2370 if (netif_running(netdev))
2371 igbvf_up(adapter);
2372 else
2373 igbvf_reset(adapter);
2374
2375 clear_bit(__IGBVF_RESETTING, &adapter->state);
2376
2377 return 0;
2378}
2379
2380static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2381{
2382 switch (cmd) {
2383 default:
2384 return -EOPNOTSUPP;
2385 }
2386}
2387
2388static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state)
2389{
2390 struct net_device *netdev = pci_get_drvdata(pdev);
2391 struct igbvf_adapter *adapter = netdev_priv(netdev);
2392#ifdef CONFIG_PM
2393 int retval = 0;
2394#endif
2395
2396 netif_device_detach(netdev);
2397
2398 if (netif_running(netdev)) {
2399 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2400 igbvf_down(adapter);
2401 igbvf_free_irq(adapter);
2402 }
2403
2404#ifdef CONFIG_PM
2405 retval = pci_save_state(pdev);
2406 if (retval)
2407 return retval;
2408#endif
2409
2410 pci_disable_device(pdev);
2411
2412 return 0;
2413}
2414
2415#ifdef CONFIG_PM
2416static int igbvf_resume(struct pci_dev *pdev)
2417{
2418 struct net_device *netdev = pci_get_drvdata(pdev);
2419 struct igbvf_adapter *adapter = netdev_priv(netdev);
2420 u32 err;
2421
2422 pci_restore_state(pdev);
2423 err = pci_enable_device_mem(pdev);
2424 if (err) {
2425 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2426 return err;
2427 }
2428
2429 pci_set_master(pdev);
2430
2431 if (netif_running(netdev)) {
2432 err = igbvf_request_irq(adapter);
2433 if (err)
2434 return err;
2435 }
2436
2437 igbvf_reset(adapter);
2438
2439 if (netif_running(netdev))
2440 igbvf_up(adapter);
2441
2442 netif_device_attach(netdev);
2443
2444 return 0;
2445}
2446#endif
2447
2448static void igbvf_shutdown(struct pci_dev *pdev)
2449{
2450 igbvf_suspend(pdev, PMSG_SUSPEND);
2451}
2452
2453#ifdef CONFIG_NET_POLL_CONTROLLER
2454/*
2455 * Polling 'interrupt' - used by things like netconsole to send skbs
2456 * without having to re-enable interrupts. It's not called while
2457 * the interrupt routine is executing.
2458 */
2459static void igbvf_netpoll(struct net_device *netdev)
2460{
2461 struct igbvf_adapter *adapter = netdev_priv(netdev);
2462
2463 disable_irq(adapter->pdev->irq);
2464
2465 igbvf_clean_tx_irq(adapter->tx_ring);
2466
2467 enable_irq(adapter->pdev->irq);
2468}
2469#endif
2470
2471/**
2472 * igbvf_io_error_detected - called when PCI error is detected
2473 * @pdev: Pointer to PCI device
2474 * @state: The current pci connection state
2475 *
2476 * This function is called after a PCI bus error affecting
2477 * this device has been detected.
2478 */
2479static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2480 pci_channel_state_t state)
2481{
2482 struct net_device *netdev = pci_get_drvdata(pdev);
2483 struct igbvf_adapter *adapter = netdev_priv(netdev);
2484
2485 netif_device_detach(netdev);
2486
c06c430d
DN		 2487 if (state == pci_channel_io_perm_failure)
2488 return PCI_ERS_RESULT_DISCONNECT;
2489
d4e0fe01
AD		 2490 if (netif_running(netdev))
2491 igbvf_down(adapter);
2492 pci_disable_device(pdev);
2493
2494 /* Request a slot slot reset. */
2495 return PCI_ERS_RESULT_NEED_RESET;
2496}
2497
2498/**
2499 * igbvf_io_slot_reset - called after the pci bus has been reset.
2500 * @pdev: Pointer to PCI device
2501 *
2502 * Restart the card from scratch, as if from a cold-boot. Implementation
2503 * resembles the first-half of the igbvf_resume routine.
2504 */
2505static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2506{
2507 struct net_device *netdev = pci_get_drvdata(pdev);
2508 struct igbvf_adapter *adapter = netdev_priv(netdev);
2509
2510 if (pci_enable_device_mem(pdev)) {
2511 dev_err(&pdev->dev,
2512 "Cannot re-enable PCI device after reset.\n");
2513 return PCI_ERS_RESULT_DISCONNECT;
2514 }
2515 pci_set_master(pdev);
2516
2517 igbvf_reset(adapter);
2518
2519 return PCI_ERS_RESULT_RECOVERED;
2520}
2521
2522/**
2523 * igbvf_io_resume - called when traffic can start flowing again.
2524 * @pdev: Pointer to PCI device
2525 *
2526 * This callback is called when the error recovery driver tells us that
2527 * its OK to resume normal operation. Implementation resembles the
2528 * second-half of the igbvf_resume routine.
2529 */
2530static void igbvf_io_resume(struct pci_dev *pdev)
2531{
2532 struct net_device *netdev = pci_get_drvdata(pdev);
2533 struct igbvf_adapter *adapter = netdev_priv(netdev);
2534
2535 if (netif_running(netdev)) {
2536 if (igbvf_up(adapter)) {
2537 dev_err(&pdev->dev,
2538 "can't bring device back up after reset\n");
2539 return;
2540 }
2541 }
2542
2543 netif_device_attach(netdev);
2544}
2545
2546static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2547{
2548 struct e1000_hw *hw = &adapter->hw;
2549 struct net_device *netdev = adapter->netdev;
2550 struct pci_dev *pdev = adapter->pdev;
2551
10090751
WM		 2552 if (hw->mac.type == e1000_vfadapt_i350)
2553 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n");
2554 else
2555 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
753cdc33 2556 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
d4e0fe01
AD		 2557}
2558
c8f44aff
MM		 2559static int igbvf_set_features(struct net_device *netdev,
2560 netdev_features_t features)
fd38f734
MM		 2561{
2562 struct igbvf_adapter *adapter = netdev_priv(netdev);
2563
2564 if (features & NETIF_F_RXCSUM)
2565 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED;
2566 else
2567 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED;
2568
2569 return 0;
2570}
2571
d4e0fe01
AD		 2572static const struct net_device_ops igbvf_netdev_ops = {
2573 .ndo_open = igbvf_open,
2574 .ndo_stop = igbvf_close,
2575 .ndo_start_xmit = igbvf_xmit_frame,
2576 .ndo_get_stats = igbvf_get_stats,
afc4b13d 2577 .ndo_set_rx_mode = igbvf_set_multi,
d4e0fe01
AD		 2578 .ndo_set_mac_address = igbvf_set_mac,
2579 .ndo_change_mtu = igbvf_change_mtu,
2580 .ndo_do_ioctl = igbvf_ioctl,
2581 .ndo_tx_timeout = igbvf_tx_timeout,
d4e0fe01
AD		 2582 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2583 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2584#ifdef CONFIG_NET_POLL_CONTROLLER
2585 .ndo_poll_controller = igbvf_netpoll,
2586#endif
fd38f734 2587 .ndo_set_features = igbvf_set_features,
d4e0fe01
AD		 2588};
2589
2590/**
2591 * igbvf_probe - Device Initialization Routine
2592 * @pdev: PCI device information struct
2593 * @ent: entry in igbvf_pci_tbl
2594 *
2595 * Returns 0 on success, negative on failure
2596 *
2597 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2598 * The OS initialization, configuring of the adapter private structure,
2599 * and a hardware reset occur.
2600 **/
2601static int __devinit igbvf_probe(struct pci_dev *pdev,
2602 const struct pci_device_id *ent)
2603{
2604 struct net_device *netdev;
2605 struct igbvf_adapter *adapter;
2606 struct e1000_hw *hw;
2607 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2608
2609 static int cards_found;
2610 int err, pci_using_dac;
2611
2612 err = pci_enable_device_mem(pdev);
2613 if (err)
2614 return err;
2615
2616 pci_using_dac = 0;
123e9f1a 2617 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
d4e0fe01 2618 if (!err) {
123e9f1a 2619 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
d4e0fe01
AD		 2620 if (!err)
2621 pci_using_dac = 1;
2622 } else {
123e9f1a 2623 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
d4e0fe01 2624 if (err) {
123e9f1a
NN		 2625 err = dma_set_coherent_mask(&pdev->dev,
2626 DMA_BIT_MASK(32));
d4e0fe01
AD		 2627 if (err) {
2628 dev_err(&pdev->dev, "No usable DMA "
2629 "configuration, aborting\n");
2630 goto err_dma;
2631 }
2632 }
2633 }
2634
2635 err = pci_request_regions(pdev, igbvf_driver_name);
2636 if (err)
2637 goto err_pci_reg;
2638
2639 pci_set_master(pdev);
2640
2641 err = -ENOMEM;
2642 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2643 if (!netdev)
2644 goto err_alloc_etherdev;
2645
2646 SET_NETDEV_DEV(netdev, &pdev->dev);
2647
2648 pci_set_drvdata(pdev, netdev);
2649 adapter = netdev_priv(netdev);
2650 hw = &adapter->hw;
2651 adapter->netdev = netdev;
2652 adapter->pdev = pdev;
2653 adapter->ei = ei;
2654 adapter->pba = ei->pba;
2655 adapter->flags = ei->flags;
2656 adapter->hw.back = adapter;
2657 adapter->hw.mac.type = ei->mac;
b3f4d599 2658 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
d4e0fe01
AD		 2659
2660 /* PCI config space info */
2661
2662 hw->vendor_id = pdev->vendor;
2663 hw->device_id = pdev->device;
2664 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2665 hw->subsystem_device_id = pdev->subsystem_device;
ff938e43 2666 hw->revision_id = pdev->revision;
d4e0fe01
AD		 2667
2668 err = -EIO;
2669 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2670 pci_resource_len(pdev, 0));
2671
2672 if (!adapter->hw.hw_addr)
2673 goto err_ioremap;
2674
2675 if (ei->get_variants) {
2676 err = ei->get_variants(adapter);
2677 if (err)
2678 goto err_ioremap;
2679 }
2680
2681 /* setup adapter struct */
2682 err = igbvf_sw_init(adapter);
2683 if (err)
2684 goto err_sw_init;
2685
2686 /* construct the net_device struct */
2687 netdev->netdev_ops = &igbvf_netdev_ops;
2688
2689 igbvf_set_ethtool_ops(netdev);
2690 netdev->watchdog_timeo = 5 * HZ;
2691 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2692
2693 adapter->bd_number = cards_found++;
2694
fd38f734 2695 netdev->hw_features = NETIF_F_SG |
d4e0fe01 2696 NETIF_F_IP_CSUM |
fd38f734
MM		 2697 NETIF_F_IPV6_CSUM |
2698 NETIF_F_TSO |
2699 NETIF_F_TSO6 |
2700 NETIF_F_RXCSUM;
2701
2702 netdev->features = netdev->hw_features |
d4e0fe01
AD		 2703 NETIF_F_HW_VLAN_TX |
2704 NETIF_F_HW_VLAN_RX |
2705 NETIF_F_HW_VLAN_FILTER;
2706
d4e0fe01
AD		 2707 if (pci_using_dac)
2708 netdev->features |= NETIF_F_HIGHDMA;
2709
2710 netdev->vlan_features |= NETIF_F_TSO;
2711 netdev->vlan_features |= NETIF_F_TSO6;
2712 netdev->vlan_features |= NETIF_F_IP_CSUM;
2713 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
2714 netdev->vlan_features |= NETIF_F_SG;
2715
2716 /*reset the controller to put the device in a known good state */
2717 err = hw->mac.ops.reset_hw(hw);
2718 if (err) {
2719 dev_info(&pdev->dev,
1242b6f3
WM		 2720 "PF still in reset state, assigning new address."
2721 " Is the PF interface up?\n");
1a0d6ae5
DK		 2722 eth_hw_addr_random(netdev);
2723 memcpy(adapter->hw.mac.addr, netdev->dev_addr,
2724 netdev->addr_len);
d4e0fe01
AD		 2725 } else {
2726 err = hw->mac.ops.read_mac_addr(hw);
2727 if (err) {
2728 dev_err(&pdev->dev, "Error reading MAC address\n");
2729 goto err_hw_init;
2730 }
1a0d6ae5
DK		 2731 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
2732 netdev->addr_len);
d4e0fe01
AD		 2733 }
2734
9bd1be45 2735 if (!is_valid_ether_addr(netdev->dev_addr)) {
753cdc33
HS		 2736 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n",
2737 netdev->dev_addr);
d4e0fe01
AD		 2738 err = -EIO;
2739 goto err_hw_init;
2740 }
2741
9bd1be45 2742 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
1a0d6ae5 2743
d4e0fe01
AD		 2744 setup_timer(&adapter->watchdog_timer, &igbvf_watchdog,
2745 (unsigned long) adapter);
2746
2747 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2748 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2749
2750 /* ring size defaults */
2751 adapter->rx_ring->count = 1024;
2752 adapter->tx_ring->count = 1024;
2753
2754 /* reset the hardware with the new settings */
2755 igbvf_reset(adapter);
2756
d4e0fe01
AD		 2757 strcpy(netdev->name, "eth%d");
2758 err = register_netdev(netdev);
2759 if (err)
2760 goto err_hw_init;
2761
de7fe787
ET		 2762 /* tell the stack to leave us alone until igbvf_open() is called */
2763 netif_carrier_off(netdev);
2764 netif_stop_queue(netdev);
2765
d4e0fe01
AD		 2766 igbvf_print_device_info(adapter);
2767
2768 igbvf_initialize_last_counter_stats(adapter);
2769
2770 return 0;
2771
2772err_hw_init:
2773 kfree(adapter->tx_ring);
2774 kfree(adapter->rx_ring);
2775err_sw_init:
2776 igbvf_reset_interrupt_capability(adapter);
2777 iounmap(adapter->hw.hw_addr);
2778err_ioremap:
2779 free_netdev(netdev);
2780err_alloc_etherdev:
2781 pci_release_regions(pdev);
2782err_pci_reg:
2783err_dma:
2784 pci_disable_device(pdev);
2785 return err;
2786}
2787
2788/**
2789 * igbvf_remove - Device Removal Routine
2790 * @pdev: PCI device information struct
2791 *
2792 * igbvf_remove is called by the PCI subsystem to alert the driver
2793 * that it should release a PCI device. The could be caused by a
2794 * Hot-Plug event, or because the driver is going to be removed from
2795 * memory.
2796 **/
2797static void __devexit igbvf_remove(struct pci_dev *pdev)
2798{
2799 struct net_device *netdev = pci_get_drvdata(pdev);
2800 struct igbvf_adapter *adapter = netdev_priv(netdev);
2801 struct e1000_hw *hw = &adapter->hw;
2802
2803 /*
760141a5
TH		 2804 * The watchdog timer may be rescheduled, so explicitly
2805 * disable it from being rescheduled.
d4e0fe01
AD		 2806 */
2807 set_bit(__IGBVF_DOWN, &adapter->state);
2808 del_timer_sync(&adapter->watchdog_timer);
2809
760141a5
TH		 2810 cancel_work_sync(&adapter->reset_task);
2811 cancel_work_sync(&adapter->watchdog_task);
d4e0fe01
AD		 2812
2813 unregister_netdev(netdev);
2814
2815 igbvf_reset_interrupt_capability(adapter);
2816
2817 /*
2818 * it is important to delete the napi struct prior to freeing the
2819 * rx ring so that you do not end up with null pointer refs
2820 */
2821 netif_napi_del(&adapter->rx_ring->napi);
2822 kfree(adapter->tx_ring);
2823 kfree(adapter->rx_ring);
2824
2825 iounmap(hw->hw_addr);
2826 if (hw->flash_address)
2827 iounmap(hw->flash_address);
2828 pci_release_regions(pdev);
2829
2830 free_netdev(netdev);
2831
2832 pci_disable_device(pdev);
2833}
2834
2835/* PCI Error Recovery (ERS) */
2836static struct pci_error_handlers igbvf_err_handler = {
2837 .error_detected = igbvf_io_error_detected,
2838 .slot_reset = igbvf_io_slot_reset,
2839 .resume = igbvf_io_resume,
2840};
2841
a3aa1884 2842static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl) = {
d4e0fe01 2843 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
031d7952 2844 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
d4e0fe01
AD		 2845 { } /* terminate list */
2846};
2847MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2848
2849/* PCI Device API Driver */
2850static struct pci_driver igbvf_driver = {
2851 .name = igbvf_driver_name,
2852 .id_table = igbvf_pci_tbl,
2853 .probe = igbvf_probe,
2854 .remove = __devexit_p(igbvf_remove),
2855#ifdef CONFIG_PM
2856 /* Power Management Hooks */
2857 .suspend = igbvf_suspend,
2858 .resume = igbvf_resume,
2859#endif
2860 .shutdown = igbvf_shutdown,
2861 .err_handler = &igbvf_err_handler
2862};
2863
2864/**
2865 * igbvf_init_module - Driver Registration Routine
2866 *
2867 * igbvf_init_module is the first routine called when the driver is
2868 * loaded. All it does is register with the PCI subsystem.
2869 **/
2870static int __init igbvf_init_module(void)
2871{
2872 int ret;
a4ba8cbe
JK		 2873 pr_info("%s - version %s\n", igbvf_driver_string, igbvf_driver_version);
2874 pr_info("%s\n", igbvf_copyright);
d4e0fe01
AD		 2875
2876 ret = pci_register_driver(&igbvf_driver);
d4e0fe01
AD		 2877
2878 return ret;
2879}
2880module_init(igbvf_init_module);
2881
2882/**
2883 * igbvf_exit_module - Driver Exit Cleanup Routine
2884 *
2885 * igbvf_exit_module is called just before the driver is removed
2886 * from memory.
2887 **/
2888static void __exit igbvf_exit_module(void)
2889{
2890 pci_unregister_driver(&igbvf_driver);
d4e0fe01
AD		 2891}
2892module_exit(igbvf_exit_module);
2893
2894
2895MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
10090751 2896MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
d4e0fe01
AD		 2897MODULE_LICENSE("GPL");
2898MODULE_VERSION(DRV_VERSION);
2899
2900/* netdev.c */
Linux kernel - Deliverables
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