]>
Commit | Line | Data |
---|---|---|
48925e37 | 1 | /* A network driver using virtio. |
296f96fc RR |
2 | * |
3 | * Copyright 2007 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
adf8d3ff | 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
296f96fc RR |
17 | */ |
18 | //#define DEBUG | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/etherdevice.h> | |
a9ea3fc6 | 21 | #include <linux/ethtool.h> |
296f96fc RR |
22 | #include <linux/module.h> |
23 | #include <linux/virtio.h> | |
24 | #include <linux/virtio_net.h> | |
25 | #include <linux/scatterlist.h> | |
e918085a | 26 | #include <linux/if_vlan.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
8de4b2f3 | 28 | #include <linux/cpu.h> |
296f96fc | 29 | |
d34710e3 | 30 | static int napi_weight = NAPI_POLL_WEIGHT; |
6c0cd7c0 DL |
31 | module_param(napi_weight, int, 0444); |
32 | ||
eb939922 | 33 | static bool csum = true, gso = true; |
34a48579 RR |
34 | module_param(csum, bool, 0444); |
35 | module_param(gso, bool, 0444); | |
36 | ||
296f96fc | 37 | /* FIXME: MTU in config. */ |
5061de36 MD |
38 | #define GOOD_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN) |
39 | #define MERGE_BUFFER_LEN (ALIGN(GOOD_PACKET_LEN + \ | |
40 | sizeof(struct virtio_net_hdr_mrg_rxbuf), \ | |
41 | L1_CACHE_BYTES)) | |
3f2c31d9 | 42 | #define GOOD_COPY_LEN 128 |
296f96fc | 43 | |
66846048 | 44 | #define VIRTNET_DRIVER_VERSION "1.0.0" |
2a41f71d | 45 | |
3fa2a1df | 46 | struct virtnet_stats { |
83a27052 ED |
47 | struct u64_stats_sync tx_syncp; |
48 | struct u64_stats_sync rx_syncp; | |
3fa2a1df | 49 | u64 tx_bytes; |
50 | u64 tx_packets; | |
51 | ||
52 | u64 rx_bytes; | |
53 | u64 rx_packets; | |
54 | }; | |
55 | ||
e9d7417b JW |
56 | /* Internal representation of a send virtqueue */ |
57 | struct send_queue { | |
58 | /* Virtqueue associated with this send _queue */ | |
59 | struct virtqueue *vq; | |
60 | ||
61 | /* TX: fragments + linear part + virtio header */ | |
62 | struct scatterlist sg[MAX_SKB_FRAGS + 2]; | |
986a4f4d JW |
63 | |
64 | /* Name of the send queue: output.$index */ | |
65 | char name[40]; | |
e9d7417b JW |
66 | }; |
67 | ||
68 | /* Internal representation of a receive virtqueue */ | |
69 | struct receive_queue { | |
70 | /* Virtqueue associated with this receive_queue */ | |
71 | struct virtqueue *vq; | |
72 | ||
296f96fc RR |
73 | struct napi_struct napi; |
74 | ||
75 | /* Number of input buffers, and max we've ever had. */ | |
76 | unsigned int num, max; | |
77 | ||
e9d7417b JW |
78 | /* Chain pages by the private ptr. */ |
79 | struct page *pages; | |
80 | ||
81 | /* RX: fragments + linear part + virtio header */ | |
82 | struct scatterlist sg[MAX_SKB_FRAGS + 2]; | |
986a4f4d JW |
83 | |
84 | /* Name of this receive queue: input.$index */ | |
85 | char name[40]; | |
e9d7417b JW |
86 | }; |
87 | ||
88 | struct virtnet_info { | |
89 | struct virtio_device *vdev; | |
90 | struct virtqueue *cvq; | |
91 | struct net_device *dev; | |
986a4f4d JW |
92 | struct send_queue *sq; |
93 | struct receive_queue *rq; | |
e9d7417b JW |
94 | unsigned int status; |
95 | ||
986a4f4d JW |
96 | /* Max # of queue pairs supported by the device */ |
97 | u16 max_queue_pairs; | |
98 | ||
99 | /* # of queue pairs currently used by the driver */ | |
100 | u16 curr_queue_pairs; | |
101 | ||
97402b96 HX |
102 | /* I like... big packets and I cannot lie! */ |
103 | bool big_packets; | |
104 | ||
3f2c31d9 MM |
105 | /* Host will merge rx buffers for big packets (shake it! shake it!) */ |
106 | bool mergeable_rx_bufs; | |
107 | ||
986a4f4d JW |
108 | /* Has control virtqueue */ |
109 | bool has_cvq; | |
110 | ||
e7428e95 MT |
111 | /* Host can handle any s/g split between our header and packet data */ |
112 | bool any_header_sg; | |
113 | ||
586d17c5 JW |
114 | /* enable config space updates */ |
115 | bool config_enable; | |
116 | ||
3fa2a1df | 117 | /* Active statistics */ |
118 | struct virtnet_stats __percpu *stats; | |
119 | ||
3161e453 RR |
120 | /* Work struct for refilling if we run low on memory. */ |
121 | struct delayed_work refill; | |
122 | ||
586d17c5 JW |
123 | /* Work struct for config space updates */ |
124 | struct work_struct config_work; | |
125 | ||
126 | /* Lock for config space updates */ | |
127 | struct mutex config_lock; | |
986a4f4d | 128 | |
2613af0e MD |
129 | /* Page_frag for GFP_KERNEL packet buffer allocation when we run |
130 | * low on memory. | |
131 | */ | |
132 | struct page_frag alloc_frag; | |
133 | ||
986a4f4d JW |
134 | /* Does the affinity hint is set for virtqueues? */ |
135 | bool affinity_hint_set; | |
47be2479 | 136 | |
8de4b2f3 WG |
137 | /* CPU hot plug notifier */ |
138 | struct notifier_block nb; | |
296f96fc RR |
139 | }; |
140 | ||
b3f24698 RR |
141 | struct skb_vnet_hdr { |
142 | union { | |
143 | struct virtio_net_hdr hdr; | |
144 | struct virtio_net_hdr_mrg_rxbuf mhdr; | |
145 | }; | |
146 | }; | |
147 | ||
9ab86bbc SM |
148 | struct padded_vnet_hdr { |
149 | struct virtio_net_hdr hdr; | |
150 | /* | |
151 | * virtio_net_hdr should be in a separated sg buffer because of a | |
152 | * QEMU bug, and data sg buffer shares same page with this header sg. | |
153 | * This padding makes next sg 16 byte aligned after virtio_net_hdr. | |
154 | */ | |
155 | char padding[6]; | |
156 | }; | |
157 | ||
986a4f4d JW |
158 | /* Converting between virtqueue no. and kernel tx/rx queue no. |
159 | * 0:rx0 1:tx0 2:rx1 3:tx1 ... 2N:rxN 2N+1:txN 2N+2:cvq | |
160 | */ | |
161 | static int vq2txq(struct virtqueue *vq) | |
162 | { | |
9d0ca6ed | 163 | return (vq->index - 1) / 2; |
986a4f4d JW |
164 | } |
165 | ||
166 | static int txq2vq(int txq) | |
167 | { | |
168 | return txq * 2 + 1; | |
169 | } | |
170 | ||
171 | static int vq2rxq(struct virtqueue *vq) | |
172 | { | |
9d0ca6ed | 173 | return vq->index / 2; |
986a4f4d JW |
174 | } |
175 | ||
176 | static int rxq2vq(int rxq) | |
177 | { | |
178 | return rxq * 2; | |
179 | } | |
180 | ||
b3f24698 | 181 | static inline struct skb_vnet_hdr *skb_vnet_hdr(struct sk_buff *skb) |
296f96fc | 182 | { |
b3f24698 | 183 | return (struct skb_vnet_hdr *)skb->cb; |
296f96fc RR |
184 | } |
185 | ||
9ab86bbc SM |
186 | /* |
187 | * private is used to chain pages for big packets, put the whole | |
188 | * most recent used list in the beginning for reuse | |
189 | */ | |
e9d7417b | 190 | static void give_pages(struct receive_queue *rq, struct page *page) |
0a888fd1 | 191 | { |
9ab86bbc | 192 | struct page *end; |
0a888fd1 | 193 | |
e9d7417b | 194 | /* Find end of list, sew whole thing into vi->rq.pages. */ |
9ab86bbc | 195 | for (end = page; end->private; end = (struct page *)end->private); |
e9d7417b JW |
196 | end->private = (unsigned long)rq->pages; |
197 | rq->pages = page; | |
0a888fd1 MM |
198 | } |
199 | ||
e9d7417b | 200 | static struct page *get_a_page(struct receive_queue *rq, gfp_t gfp_mask) |
fb6813f4 | 201 | { |
e9d7417b | 202 | struct page *p = rq->pages; |
fb6813f4 | 203 | |
9ab86bbc | 204 | if (p) { |
e9d7417b | 205 | rq->pages = (struct page *)p->private; |
9ab86bbc SM |
206 | /* clear private here, it is used to chain pages */ |
207 | p->private = 0; | |
208 | } else | |
fb6813f4 RR |
209 | p = alloc_page(gfp_mask); |
210 | return p; | |
211 | } | |
212 | ||
e9d7417b | 213 | static void skb_xmit_done(struct virtqueue *vq) |
296f96fc | 214 | { |
e9d7417b | 215 | struct virtnet_info *vi = vq->vdev->priv; |
296f96fc | 216 | |
2cb9c6ba | 217 | /* Suppress further interrupts. */ |
e9d7417b | 218 | virtqueue_disable_cb(vq); |
11a3a154 | 219 | |
363f1514 | 220 | /* We were probably waiting for more output buffers. */ |
986a4f4d | 221 | netif_wake_subqueue(vi->dev, vq2txq(vq)); |
296f96fc RR |
222 | } |
223 | ||
3464645a | 224 | /* Called from bottom half context */ |
e9d7417b | 225 | static struct sk_buff *page_to_skb(struct receive_queue *rq, |
2613af0e MD |
226 | struct page *page, unsigned int offset, |
227 | unsigned int len, unsigned int truesize) | |
9ab86bbc | 228 | { |
e9d7417b | 229 | struct virtnet_info *vi = rq->vq->vdev->priv; |
9ab86bbc SM |
230 | struct sk_buff *skb; |
231 | struct skb_vnet_hdr *hdr; | |
2613af0e | 232 | unsigned int copy, hdr_len, hdr_padded_len; |
9ab86bbc | 233 | char *p; |
fb6813f4 | 234 | |
2613af0e | 235 | p = page_address(page) + offset; |
3f2c31d9 | 236 | |
9ab86bbc SM |
237 | /* copy small packet so we can reuse these pages for small data */ |
238 | skb = netdev_alloc_skb_ip_align(vi->dev, GOOD_COPY_LEN); | |
239 | if (unlikely(!skb)) | |
240 | return NULL; | |
3f2c31d9 | 241 | |
9ab86bbc | 242 | hdr = skb_vnet_hdr(skb); |
3f2c31d9 | 243 | |
9ab86bbc SM |
244 | if (vi->mergeable_rx_bufs) { |
245 | hdr_len = sizeof hdr->mhdr; | |
2613af0e | 246 | hdr_padded_len = sizeof hdr->mhdr; |
9ab86bbc SM |
247 | } else { |
248 | hdr_len = sizeof hdr->hdr; | |
2613af0e | 249 | hdr_padded_len = sizeof(struct padded_vnet_hdr); |
9ab86bbc | 250 | } |
3f2c31d9 | 251 | |
9ab86bbc | 252 | memcpy(hdr, p, hdr_len); |
3f2c31d9 | 253 | |
9ab86bbc | 254 | len -= hdr_len; |
2613af0e MD |
255 | offset += hdr_padded_len; |
256 | p += hdr_padded_len; | |
3f2c31d9 | 257 | |
9ab86bbc SM |
258 | copy = len; |
259 | if (copy > skb_tailroom(skb)) | |
260 | copy = skb_tailroom(skb); | |
261 | memcpy(skb_put(skb, copy), p, copy); | |
3f2c31d9 | 262 | |
9ab86bbc SM |
263 | len -= copy; |
264 | offset += copy; | |
3f2c31d9 | 265 | |
2613af0e MD |
266 | if (vi->mergeable_rx_bufs) { |
267 | if (len) | |
268 | skb_add_rx_frag(skb, 0, page, offset, len, truesize); | |
269 | else | |
270 | put_page(page); | |
271 | return skb; | |
272 | } | |
273 | ||
e878d78b SL |
274 | /* |
275 | * Verify that we can indeed put this data into a skb. | |
276 | * This is here to handle cases when the device erroneously | |
277 | * tries to receive more than is possible. This is usually | |
278 | * the case of a broken device. | |
279 | */ | |
280 | if (unlikely(len > MAX_SKB_FRAGS * PAGE_SIZE)) { | |
be443899 | 281 | net_dbg_ratelimited("%s: too much data\n", skb->dev->name); |
e878d78b SL |
282 | dev_kfree_skb(skb); |
283 | return NULL; | |
284 | } | |
2613af0e | 285 | BUG_ON(offset >= PAGE_SIZE); |
9ab86bbc | 286 | while (len) { |
2613af0e MD |
287 | unsigned int frag_size = min((unsigned)PAGE_SIZE - offset, len); |
288 | skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, offset, | |
289 | frag_size, truesize); | |
290 | len -= frag_size; | |
9ab86bbc SM |
291 | page = (struct page *)page->private; |
292 | offset = 0; | |
293 | } | |
3f2c31d9 | 294 | |
9ab86bbc | 295 | if (page) |
e9d7417b | 296 | give_pages(rq, page); |
3f2c31d9 | 297 | |
9ab86bbc SM |
298 | return skb; |
299 | } | |
3f2c31d9 | 300 | |
f121159d MT |
301 | static struct sk_buff *receive_small(void *buf, unsigned int len) |
302 | { | |
303 | struct sk_buff * skb = buf; | |
304 | ||
305 | len -= sizeof(struct virtio_net_hdr); | |
306 | skb_trim(skb, len); | |
307 | ||
308 | return skb; | |
309 | } | |
310 | ||
311 | static struct sk_buff *receive_big(struct net_device *dev, | |
312 | struct receive_queue *rq, | |
313 | void *buf, | |
314 | unsigned int len) | |
315 | { | |
316 | struct page *page = buf; | |
317 | struct sk_buff *skb = page_to_skb(rq, page, 0, len, PAGE_SIZE); | |
318 | ||
319 | if (unlikely(!skb)) | |
320 | goto err; | |
321 | ||
322 | return skb; | |
323 | ||
324 | err: | |
325 | dev->stats.rx_dropped++; | |
326 | give_pages(rq, page); | |
327 | return NULL; | |
328 | } | |
329 | ||
8fc3b9e9 MT |
330 | static struct sk_buff *receive_mergeable(struct net_device *dev, |
331 | struct receive_queue *rq, | |
332 | void *buf, | |
333 | unsigned int len) | |
9ab86bbc | 334 | { |
8fc3b9e9 MT |
335 | struct skb_vnet_hdr *hdr = buf; |
336 | int num_buf = hdr->mhdr.num_buffers; | |
337 | struct page *page = virt_to_head_page(buf); | |
338 | int offset = buf - page_address(page); | |
339 | struct sk_buff *head_skb = page_to_skb(rq, page, offset, len, | |
340 | MERGE_BUFFER_LEN); | |
2613af0e | 341 | struct sk_buff *curr_skb = head_skb; |
9ab86bbc | 342 | |
8fc3b9e9 MT |
343 | if (unlikely(!curr_skb)) |
344 | goto err_skb; | |
345 | ||
9ab86bbc | 346 | while (--num_buf) { |
8fc3b9e9 MT |
347 | int num_skb_frags; |
348 | ||
2613af0e MD |
349 | buf = virtqueue_get_buf(rq->vq, &len); |
350 | if (unlikely(!buf)) { | |
8fc3b9e9 MT |
351 | pr_debug("%s: rx error: %d buffers out of %d missing\n", |
352 | dev->name, num_buf, hdr->mhdr.num_buffers); | |
353 | dev->stats.rx_length_errors++; | |
354 | goto err_buf; | |
3f2c31d9 | 355 | } |
5061de36 | 356 | if (unlikely(len > MERGE_BUFFER_LEN)) { |
2613af0e | 357 | pr_debug("%s: rx error: merge buffer too long\n", |
8fc3b9e9 | 358 | dev->name); |
5061de36 | 359 | len = MERGE_BUFFER_LEN; |
2613af0e | 360 | } |
8fc3b9e9 MT |
361 | |
362 | page = virt_to_head_page(buf); | |
363 | --rq->num; | |
364 | ||
365 | num_skb_frags = skb_shinfo(curr_skb)->nr_frags; | |
2613af0e MD |
366 | if (unlikely(num_skb_frags == MAX_SKB_FRAGS)) { |
367 | struct sk_buff *nskb = alloc_skb(0, GFP_ATOMIC); | |
8fc3b9e9 MT |
368 | |
369 | if (unlikely(!nskb)) | |
370 | goto err_skb; | |
2613af0e MD |
371 | if (curr_skb == head_skb) |
372 | skb_shinfo(curr_skb)->frag_list = nskb; | |
373 | else | |
374 | curr_skb->next = nskb; | |
375 | curr_skb = nskb; | |
376 | head_skb->truesize += nskb->truesize; | |
377 | num_skb_frags = 0; | |
378 | } | |
379 | if (curr_skb != head_skb) { | |
380 | head_skb->data_len += len; | |
381 | head_skb->len += len; | |
5061de36 | 382 | head_skb->truesize += MERGE_BUFFER_LEN; |
2613af0e | 383 | } |
8fc3b9e9 | 384 | offset = buf - page_address(page); |
ba275241 JW |
385 | if (skb_can_coalesce(curr_skb, num_skb_frags, page, offset)) { |
386 | put_page(page); | |
387 | skb_coalesce_rx_frag(curr_skb, num_skb_frags - 1, | |
5061de36 | 388 | len, MERGE_BUFFER_LEN); |
ba275241 JW |
389 | } else { |
390 | skb_add_rx_frag(curr_skb, num_skb_frags, page, | |
5061de36 | 391 | offset, len, MERGE_BUFFER_LEN); |
ba275241 | 392 | } |
8fc3b9e9 MT |
393 | } |
394 | ||
395 | return head_skb; | |
396 | ||
397 | err_skb: | |
398 | put_page(page); | |
399 | while (--num_buf) { | |
400 | buf = virtqueue_get_buf(rq->vq, &len); | |
401 | if (unlikely(!buf)) { | |
402 | pr_debug("%s: rx error: %d buffers missing\n", | |
403 | dev->name, num_buf); | |
404 | dev->stats.rx_length_errors++; | |
405 | break; | |
406 | } | |
407 | page = virt_to_head_page(buf); | |
408 | put_page(page); | |
e9d7417b | 409 | --rq->num; |
9ab86bbc | 410 | } |
8fc3b9e9 MT |
411 | err_buf: |
412 | dev->stats.rx_dropped++; | |
413 | dev_kfree_skb(head_skb); | |
414 | return NULL; | |
9ab86bbc SM |
415 | } |
416 | ||
e9d7417b | 417 | static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len) |
9ab86bbc | 418 | { |
e9d7417b JW |
419 | struct virtnet_info *vi = rq->vq->vdev->priv; |
420 | struct net_device *dev = vi->dev; | |
58472a76 | 421 | struct virtnet_stats *stats = this_cpu_ptr(vi->stats); |
9ab86bbc | 422 | struct sk_buff *skb; |
9ab86bbc | 423 | struct skb_vnet_hdr *hdr; |
3f2c31d9 | 424 | |
9ab86bbc SM |
425 | if (unlikely(len < sizeof(struct virtio_net_hdr) + ETH_HLEN)) { |
426 | pr_debug("%s: short packet %i\n", dev->name, len); | |
427 | dev->stats.rx_length_errors++; | |
98bfd23c | 428 | if (vi->mergeable_rx_bufs) |
2613af0e | 429 | put_page(virt_to_head_page(buf)); |
98bfd23c MD |
430 | else if (vi->big_packets) |
431 | give_pages(rq, buf); | |
9ab86bbc SM |
432 | else |
433 | dev_kfree_skb(buf); | |
434 | return; | |
435 | } | |
3f2c31d9 | 436 | |
f121159d | 437 | if (vi->mergeable_rx_bufs) |
8fc3b9e9 | 438 | skb = receive_mergeable(dev, rq, buf, len); |
f121159d MT |
439 | else if (vi->big_packets) |
440 | skb = receive_big(dev, rq, buf, len); | |
441 | else | |
442 | skb = receive_small(buf, len); | |
443 | ||
444 | if (unlikely(!skb)) | |
445 | return; | |
3f2c31d9 | 446 | |
9ab86bbc | 447 | hdr = skb_vnet_hdr(skb); |
3fa2a1df | 448 | |
83a27052 | 449 | u64_stats_update_begin(&stats->rx_syncp); |
3fa2a1df | 450 | stats->rx_bytes += skb->len; |
451 | stats->rx_packets++; | |
83a27052 | 452 | u64_stats_update_end(&stats->rx_syncp); |
296f96fc | 453 | |
b3f24698 | 454 | if (hdr->hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { |
296f96fc | 455 | pr_debug("Needs csum!\n"); |
b3f24698 RR |
456 | if (!skb_partial_csum_set(skb, |
457 | hdr->hdr.csum_start, | |
458 | hdr->hdr.csum_offset)) | |
296f96fc | 459 | goto frame_err; |
10a8d94a JW |
460 | } else if (hdr->hdr.flags & VIRTIO_NET_HDR_F_DATA_VALID) { |
461 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
296f96fc RR |
462 | } |
463 | ||
23cde76d MM |
464 | skb->protocol = eth_type_trans(skb, dev); |
465 | pr_debug("Receiving skb proto 0x%04x len %i type %i\n", | |
466 | ntohs(skb->protocol), skb->len, skb->pkt_type); | |
467 | ||
b3f24698 | 468 | if (hdr->hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) { |
296f96fc | 469 | pr_debug("GSO!\n"); |
b3f24698 | 470 | switch (hdr->hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { |
296f96fc | 471 | case VIRTIO_NET_HDR_GSO_TCPV4: |
c9af6db4 | 472 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; |
296f96fc | 473 | break; |
296f96fc | 474 | case VIRTIO_NET_HDR_GSO_UDP: |
c9af6db4 | 475 | skb_shinfo(skb)->gso_type = SKB_GSO_UDP; |
296f96fc RR |
476 | break; |
477 | case VIRTIO_NET_HDR_GSO_TCPV6: | |
c9af6db4 | 478 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; |
296f96fc RR |
479 | break; |
480 | default: | |
be443899 AW |
481 | net_warn_ratelimited("%s: bad gso type %u.\n", |
482 | dev->name, hdr->hdr.gso_type); | |
296f96fc RR |
483 | goto frame_err; |
484 | } | |
485 | ||
b3f24698 | 486 | if (hdr->hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN) |
c9af6db4 | 487 | skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN; |
34a48579 | 488 | |
b3f24698 | 489 | skb_shinfo(skb)->gso_size = hdr->hdr.gso_size; |
296f96fc | 490 | if (skb_shinfo(skb)->gso_size == 0) { |
be443899 | 491 | net_warn_ratelimited("%s: zero gso size.\n", dev->name); |
296f96fc RR |
492 | goto frame_err; |
493 | } | |
494 | ||
495 | /* Header must be checked, and gso_segs computed. */ | |
496 | skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY; | |
497 | skb_shinfo(skb)->gso_segs = 0; | |
498 | } | |
499 | ||
500 | netif_receive_skb(skb); | |
501 | return; | |
502 | ||
503 | frame_err: | |
504 | dev->stats.rx_frame_errors++; | |
296f96fc RR |
505 | dev_kfree_skb(skb); |
506 | } | |
507 | ||
e9d7417b | 508 | static int add_recvbuf_small(struct receive_queue *rq, gfp_t gfp) |
296f96fc | 509 | { |
e9d7417b | 510 | struct virtnet_info *vi = rq->vq->vdev->priv; |
296f96fc | 511 | struct sk_buff *skb; |
9ab86bbc | 512 | struct skb_vnet_hdr *hdr; |
9ab86bbc | 513 | int err; |
3f2c31d9 | 514 | |
5061de36 | 515 | skb = __netdev_alloc_skb_ip_align(vi->dev, GOOD_PACKET_LEN, gfp); |
9ab86bbc SM |
516 | if (unlikely(!skb)) |
517 | return -ENOMEM; | |
296f96fc | 518 | |
5061de36 | 519 | skb_put(skb, GOOD_PACKET_LEN); |
3f2c31d9 | 520 | |
9ab86bbc | 521 | hdr = skb_vnet_hdr(skb); |
e9d7417b | 522 | sg_set_buf(rq->sg, &hdr->hdr, sizeof hdr->hdr); |
97402b96 | 523 | |
e9d7417b | 524 | skb_to_sgvec(skb, rq->sg + 1, 0, skb->len); |
97402b96 | 525 | |
9dc7b9e4 | 526 | err = virtqueue_add_inbuf(rq->vq, rq->sg, 2, skb, gfp); |
9ab86bbc SM |
527 | if (err < 0) |
528 | dev_kfree_skb(skb); | |
97402b96 | 529 | |
9ab86bbc SM |
530 | return err; |
531 | } | |
97402b96 | 532 | |
e9d7417b | 533 | static int add_recvbuf_big(struct receive_queue *rq, gfp_t gfp) |
9ab86bbc | 534 | { |
9ab86bbc SM |
535 | struct page *first, *list = NULL; |
536 | char *p; | |
537 | int i, err, offset; | |
538 | ||
e9d7417b | 539 | /* page in rq->sg[MAX_SKB_FRAGS + 1] is list tail */ |
9ab86bbc | 540 | for (i = MAX_SKB_FRAGS + 1; i > 1; --i) { |
e9d7417b | 541 | first = get_a_page(rq, gfp); |
9ab86bbc SM |
542 | if (!first) { |
543 | if (list) | |
e9d7417b | 544 | give_pages(rq, list); |
9ab86bbc | 545 | return -ENOMEM; |
97402b96 | 546 | } |
e9d7417b | 547 | sg_set_buf(&rq->sg[i], page_address(first), PAGE_SIZE); |
97402b96 | 548 | |
9ab86bbc SM |
549 | /* chain new page in list head to match sg */ |
550 | first->private = (unsigned long)list; | |
551 | list = first; | |
552 | } | |
296f96fc | 553 | |
e9d7417b | 554 | first = get_a_page(rq, gfp); |
9ab86bbc | 555 | if (!first) { |
e9d7417b | 556 | give_pages(rq, list); |
9ab86bbc SM |
557 | return -ENOMEM; |
558 | } | |
559 | p = page_address(first); | |
560 | ||
e9d7417b JW |
561 | /* rq->sg[0], rq->sg[1] share the same page */ |
562 | /* a separated rq->sg[0] for virtio_net_hdr only due to QEMU bug */ | |
563 | sg_set_buf(&rq->sg[0], p, sizeof(struct virtio_net_hdr)); | |
9ab86bbc | 564 | |
e9d7417b | 565 | /* rq->sg[1] for data packet, from offset */ |
9ab86bbc | 566 | offset = sizeof(struct padded_vnet_hdr); |
e9d7417b | 567 | sg_set_buf(&rq->sg[1], p + offset, PAGE_SIZE - offset); |
9ab86bbc SM |
568 | |
569 | /* chain first in list head */ | |
570 | first->private = (unsigned long)list; | |
9dc7b9e4 RR |
571 | err = virtqueue_add_inbuf(rq->vq, rq->sg, MAX_SKB_FRAGS + 2, |
572 | first, gfp); | |
9ab86bbc | 573 | if (err < 0) |
e9d7417b | 574 | give_pages(rq, first); |
9ab86bbc SM |
575 | |
576 | return err; | |
296f96fc RR |
577 | } |
578 | ||
e9d7417b | 579 | static int add_recvbuf_mergeable(struct receive_queue *rq, gfp_t gfp) |
3f2c31d9 | 580 | { |
2613af0e MD |
581 | struct virtnet_info *vi = rq->vq->vdev->priv; |
582 | char *buf = NULL; | |
3f2c31d9 | 583 | int err; |
3f2c31d9 | 584 | |
2613af0e | 585 | if (gfp & __GFP_WAIT) { |
5061de36 | 586 | if (skb_page_frag_refill(MERGE_BUFFER_LEN, &vi->alloc_frag, |
2613af0e MD |
587 | gfp)) { |
588 | buf = (char *)page_address(vi->alloc_frag.page) + | |
589 | vi->alloc_frag.offset; | |
590 | get_page(vi->alloc_frag.page); | |
5061de36 | 591 | vi->alloc_frag.offset += MERGE_BUFFER_LEN; |
2613af0e MD |
592 | } |
593 | } else { | |
5061de36 | 594 | buf = netdev_alloc_frag(MERGE_BUFFER_LEN); |
2613af0e MD |
595 | } |
596 | if (!buf) | |
9ab86bbc | 597 | return -ENOMEM; |
3f2c31d9 | 598 | |
5061de36 | 599 | sg_init_one(rq->sg, buf, MERGE_BUFFER_LEN); |
2613af0e | 600 | err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, buf, gfp); |
9ab86bbc | 601 | if (err < 0) |
2613af0e | 602 | put_page(virt_to_head_page(buf)); |
3f2c31d9 | 603 | |
9ab86bbc SM |
604 | return err; |
605 | } | |
3f2c31d9 | 606 | |
b2baed69 RR |
607 | /* |
608 | * Returns false if we couldn't fill entirely (OOM). | |
609 | * | |
610 | * Normally run in the receive path, but can also be run from ndo_open | |
611 | * before we're receiving packets, or from refill_work which is | |
612 | * careful to disable receiving (using napi_disable). | |
613 | */ | |
e9d7417b | 614 | static bool try_fill_recv(struct receive_queue *rq, gfp_t gfp) |
9ab86bbc | 615 | { |
e9d7417b | 616 | struct virtnet_info *vi = rq->vq->vdev->priv; |
9ab86bbc | 617 | int err; |
1788f495 | 618 | bool oom; |
3f2c31d9 | 619 | |
9ab86bbc SM |
620 | do { |
621 | if (vi->mergeable_rx_bufs) | |
e9d7417b | 622 | err = add_recvbuf_mergeable(rq, gfp); |
9ab86bbc | 623 | else if (vi->big_packets) |
e9d7417b | 624 | err = add_recvbuf_big(rq, gfp); |
9ab86bbc | 625 | else |
e9d7417b | 626 | err = add_recvbuf_small(rq, gfp); |
3f2c31d9 | 627 | |
1788f495 | 628 | oom = err == -ENOMEM; |
9ed4cb07 | 629 | if (err) |
3f2c31d9 | 630 | break; |
e9d7417b | 631 | ++rq->num; |
b7dfde95 | 632 | } while (rq->vq->num_free); |
e9d7417b JW |
633 | if (unlikely(rq->num > rq->max)) |
634 | rq->max = rq->num; | |
67975901 HG |
635 | if (unlikely(!virtqueue_kick(rq->vq))) |
636 | return false; | |
3161e453 | 637 | return !oom; |
3f2c31d9 MM |
638 | } |
639 | ||
18445c4d | 640 | static void skb_recv_done(struct virtqueue *rvq) |
296f96fc RR |
641 | { |
642 | struct virtnet_info *vi = rvq->vdev->priv; | |
986a4f4d | 643 | struct receive_queue *rq = &vi->rq[vq2rxq(rvq)]; |
e9d7417b | 644 | |
18445c4d | 645 | /* Schedule NAPI, Suppress further interrupts if successful. */ |
e9d7417b | 646 | if (napi_schedule_prep(&rq->napi)) { |
1915a712 | 647 | virtqueue_disable_cb(rvq); |
e9d7417b | 648 | __napi_schedule(&rq->napi); |
18445c4d | 649 | } |
296f96fc RR |
650 | } |
651 | ||
e9d7417b | 652 | static void virtnet_napi_enable(struct receive_queue *rq) |
3e9d08ec | 653 | { |
e9d7417b | 654 | napi_enable(&rq->napi); |
3e9d08ec BR |
655 | |
656 | /* If all buffers were filled by other side before we napi_enabled, we | |
657 | * won't get another interrupt, so process any outstanding packets | |
658 | * now. virtnet_poll wants re-enable the queue, so we disable here. | |
659 | * We synchronize against interrupts via NAPI_STATE_SCHED */ | |
e9d7417b JW |
660 | if (napi_schedule_prep(&rq->napi)) { |
661 | virtqueue_disable_cb(rq->vq); | |
ec13ee80 | 662 | local_bh_disable(); |
e9d7417b | 663 | __napi_schedule(&rq->napi); |
ec13ee80 | 664 | local_bh_enable(); |
3e9d08ec BR |
665 | } |
666 | } | |
667 | ||
3161e453 RR |
668 | static void refill_work(struct work_struct *work) |
669 | { | |
e9d7417b JW |
670 | struct virtnet_info *vi = |
671 | container_of(work, struct virtnet_info, refill.work); | |
3161e453 | 672 | bool still_empty; |
986a4f4d JW |
673 | int i; |
674 | ||
55257d72 | 675 | for (i = 0; i < vi->curr_queue_pairs; i++) { |
986a4f4d | 676 | struct receive_queue *rq = &vi->rq[i]; |
3161e453 | 677 | |
986a4f4d JW |
678 | napi_disable(&rq->napi); |
679 | still_empty = !try_fill_recv(rq, GFP_KERNEL); | |
680 | virtnet_napi_enable(rq); | |
3161e453 | 681 | |
986a4f4d JW |
682 | /* In theory, this can happen: if we don't get any buffers in |
683 | * we will *never* try to fill again. | |
684 | */ | |
685 | if (still_empty) | |
686 | schedule_delayed_work(&vi->refill, HZ/2); | |
687 | } | |
3161e453 RR |
688 | } |
689 | ||
296f96fc RR |
690 | static int virtnet_poll(struct napi_struct *napi, int budget) |
691 | { | |
e9d7417b JW |
692 | struct receive_queue *rq = |
693 | container_of(napi, struct receive_queue, napi); | |
694 | struct virtnet_info *vi = rq->vq->vdev->priv; | |
9ab86bbc | 695 | void *buf; |
cbdadbbf | 696 | unsigned int r, len, received = 0; |
296f96fc RR |
697 | |
698 | again: | |
699 | while (received < budget && | |
e9d7417b JW |
700 | (buf = virtqueue_get_buf(rq->vq, &len)) != NULL) { |
701 | receive_buf(rq, buf, len); | |
702 | --rq->num; | |
296f96fc RR |
703 | received++; |
704 | } | |
705 | ||
e9d7417b JW |
706 | if (rq->num < rq->max / 2) { |
707 | if (!try_fill_recv(rq, GFP_ATOMIC)) | |
3b07e9ca | 708 | schedule_delayed_work(&vi->refill, 0); |
3161e453 | 709 | } |
296f96fc | 710 | |
8329d98e RR |
711 | /* Out of packets? */ |
712 | if (received < budget) { | |
cbdadbbf | 713 | r = virtqueue_enable_cb_prepare(rq->vq); |
288379f0 | 714 | napi_complete(napi); |
cbdadbbf | 715 | if (unlikely(virtqueue_poll(rq->vq, r)) && |
8e95a202 | 716 | napi_schedule_prep(napi)) { |
e9d7417b | 717 | virtqueue_disable_cb(rq->vq); |
288379f0 | 718 | __napi_schedule(napi); |
296f96fc | 719 | goto again; |
4265f161 | 720 | } |
296f96fc RR |
721 | } |
722 | ||
723 | return received; | |
724 | } | |
725 | ||
986a4f4d JW |
726 | static int virtnet_open(struct net_device *dev) |
727 | { | |
728 | struct virtnet_info *vi = netdev_priv(dev); | |
729 | int i; | |
730 | ||
e4166625 JW |
731 | for (i = 0; i < vi->max_queue_pairs; i++) { |
732 | if (i < vi->curr_queue_pairs) | |
733 | /* Make sure we have some buffers: if oom use wq. */ | |
734 | if (!try_fill_recv(&vi->rq[i], GFP_KERNEL)) | |
735 | schedule_delayed_work(&vi->refill, 0); | |
986a4f4d JW |
736 | virtnet_napi_enable(&vi->rq[i]); |
737 | } | |
738 | ||
739 | return 0; | |
740 | } | |
741 | ||
b7dfde95 | 742 | static void free_old_xmit_skbs(struct send_queue *sq) |
296f96fc RR |
743 | { |
744 | struct sk_buff *skb; | |
6ee57bcc | 745 | unsigned int len; |
e9d7417b | 746 | struct virtnet_info *vi = sq->vq->vdev->priv; |
58472a76 | 747 | struct virtnet_stats *stats = this_cpu_ptr(vi->stats); |
296f96fc | 748 | |
e9d7417b | 749 | while ((skb = virtqueue_get_buf(sq->vq, &len)) != NULL) { |
296f96fc | 750 | pr_debug("Sent skb %p\n", skb); |
3fa2a1df | 751 | |
83a27052 | 752 | u64_stats_update_begin(&stats->tx_syncp); |
3fa2a1df | 753 | stats->tx_bytes += skb->len; |
754 | stats->tx_packets++; | |
83a27052 | 755 | u64_stats_update_end(&stats->tx_syncp); |
3fa2a1df | 756 | |
ed79bab8 | 757 | dev_kfree_skb_any(skb); |
296f96fc RR |
758 | } |
759 | } | |
760 | ||
e9d7417b | 761 | static int xmit_skb(struct send_queue *sq, struct sk_buff *skb) |
296f96fc | 762 | { |
e7428e95 | 763 | struct skb_vnet_hdr *hdr; |
296f96fc | 764 | const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest; |
e9d7417b | 765 | struct virtnet_info *vi = sq->vq->vdev->priv; |
7bedc7dc | 766 | unsigned num_sg; |
e7428e95 MT |
767 | unsigned hdr_len; |
768 | bool can_push; | |
296f96fc | 769 | |
e174961c | 770 | pr_debug("%s: xmit %p %pM\n", vi->dev->name, skb, dest); |
e7428e95 MT |
771 | if (vi->mergeable_rx_bufs) |
772 | hdr_len = sizeof hdr->mhdr; | |
773 | else | |
774 | hdr_len = sizeof hdr->hdr; | |
775 | ||
776 | can_push = vi->any_header_sg && | |
777 | !((unsigned long)skb->data & (__alignof__(*hdr) - 1)) && | |
778 | !skb_header_cloned(skb) && skb_headroom(skb) >= hdr_len; | |
779 | /* Even if we can, don't push here yet as this would skew | |
780 | * csum_start offset below. */ | |
781 | if (can_push) | |
782 | hdr = (struct skb_vnet_hdr *)(skb->data - hdr_len); | |
783 | else | |
784 | hdr = skb_vnet_hdr(skb); | |
296f96fc | 785 | |
296f96fc | 786 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
b3f24698 | 787 | hdr->hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; |
55508d60 | 788 | hdr->hdr.csum_start = skb_checksum_start_offset(skb); |
b3f24698 | 789 | hdr->hdr.csum_offset = skb->csum_offset; |
296f96fc | 790 | } else { |
b3f24698 RR |
791 | hdr->hdr.flags = 0; |
792 | hdr->hdr.csum_offset = hdr->hdr.csum_start = 0; | |
296f96fc RR |
793 | } |
794 | ||
795 | if (skb_is_gso(skb)) { | |
b3f24698 RR |
796 | hdr->hdr.hdr_len = skb_headlen(skb); |
797 | hdr->hdr.gso_size = skb_shinfo(skb)->gso_size; | |
34a48579 | 798 | if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) |
b3f24698 | 799 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4; |
296f96fc | 800 | else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) |
b3f24698 | 801 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6; |
296f96fc | 802 | else if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
b3f24698 | 803 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP; |
296f96fc RR |
804 | else |
805 | BUG(); | |
34a48579 | 806 | if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN) |
b3f24698 | 807 | hdr->hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN; |
296f96fc | 808 | } else { |
b3f24698 RR |
809 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE; |
810 | hdr->hdr.gso_size = hdr->hdr.hdr_len = 0; | |
296f96fc RR |
811 | } |
812 | ||
3f2c31d9 | 813 | if (vi->mergeable_rx_bufs) |
e7428e95 | 814 | hdr->mhdr.num_buffers = 0; |
3f2c31d9 | 815 | |
e7428e95 MT |
816 | if (can_push) { |
817 | __skb_push(skb, hdr_len); | |
818 | num_sg = skb_to_sgvec(skb, sq->sg, 0, skb->len); | |
819 | /* Pull header back to avoid skew in tx bytes calculations. */ | |
820 | __skb_pull(skb, hdr_len); | |
821 | } else { | |
822 | sg_set_buf(sq->sg, hdr, hdr_len); | |
823 | num_sg = skb_to_sgvec(skb, sq->sg + 1, 0, skb->len) + 1; | |
824 | } | |
9dc7b9e4 | 825 | return virtqueue_add_outbuf(sq->vq, sq->sg, num_sg, skb, GFP_ATOMIC); |
11a3a154 RR |
826 | } |
827 | ||
424efe9c | 828 | static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev) |
99ffc696 RR |
829 | { |
830 | struct virtnet_info *vi = netdev_priv(dev); | |
986a4f4d JW |
831 | int qnum = skb_get_queue_mapping(skb); |
832 | struct send_queue *sq = &vi->sq[qnum]; | |
9ed4cb07 | 833 | int err; |
2cb9c6ba | 834 | |
2cb9c6ba | 835 | /* Free up any pending old buffers before queueing new ones. */ |
e9d7417b | 836 | free_old_xmit_skbs(sq); |
99ffc696 | 837 | |
03f191ba | 838 | /* Try to transmit */ |
b7dfde95 | 839 | err = xmit_skb(sq, skb); |
48925e37 | 840 | |
9ed4cb07 | 841 | /* This should not happen! */ |
67975901 | 842 | if (unlikely(err) || unlikely(!virtqueue_kick(sq->vq))) { |
9ed4cb07 RR |
843 | dev->stats.tx_fifo_errors++; |
844 | if (net_ratelimit()) | |
845 | dev_warn(&dev->dev, | |
b7dfde95 | 846 | "Unexpected TXQ (%d) queue failure: %d\n", qnum, err); |
58eba97d RR |
847 | dev->stats.tx_dropped++; |
848 | kfree_skb(skb); | |
849 | return NETDEV_TX_OK; | |
296f96fc | 850 | } |
03f191ba | 851 | |
48925e37 RR |
852 | /* Don't wait up for transmitted skbs to be freed. */ |
853 | skb_orphan(skb); | |
854 | nf_reset(skb); | |
855 | ||
856 | /* Apparently nice girls don't return TX_BUSY; stop the queue | |
857 | * before it gets out of hand. Naturally, this wastes entries. */ | |
b7dfde95 | 858 | if (sq->vq->num_free < 2+MAX_SKB_FRAGS) { |
986a4f4d | 859 | netif_stop_subqueue(dev, qnum); |
e9d7417b | 860 | if (unlikely(!virtqueue_enable_cb_delayed(sq->vq))) { |
48925e37 | 861 | /* More just got used, free them then recheck. */ |
b7dfde95 LT |
862 | free_old_xmit_skbs(sq); |
863 | if (sq->vq->num_free >= 2+MAX_SKB_FRAGS) { | |
986a4f4d | 864 | netif_start_subqueue(dev, qnum); |
e9d7417b | 865 | virtqueue_disable_cb(sq->vq); |
48925e37 RR |
866 | } |
867 | } | |
99ffc696 | 868 | } |
48925e37 RR |
869 | |
870 | return NETDEV_TX_OK; | |
296f96fc RR |
871 | } |
872 | ||
40cbfc37 AK |
873 | /* |
874 | * Send command via the control virtqueue and check status. Commands | |
875 | * supported by the hypervisor, as indicated by feature bits, should | |
876 | * never fail unless improperly formated. | |
877 | */ | |
878 | static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd, | |
d24bae32 | 879 | struct scatterlist *out) |
40cbfc37 | 880 | { |
f7bc9594 | 881 | struct scatterlist *sgs[4], hdr, stat; |
40cbfc37 AK |
882 | struct virtio_net_ctrl_hdr ctrl; |
883 | virtio_net_ctrl_ack status = ~0; | |
d24bae32 | 884 | unsigned out_num = 0, tmp; |
40cbfc37 AK |
885 | |
886 | /* Caller should know better */ | |
f7bc9594 | 887 | BUG_ON(!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ)); |
40cbfc37 AK |
888 | |
889 | ctrl.class = class; | |
890 | ctrl.cmd = cmd; | |
f7bc9594 RR |
891 | /* Add header */ |
892 | sg_init_one(&hdr, &ctrl, sizeof(ctrl)); | |
893 | sgs[out_num++] = &hdr; | |
40cbfc37 | 894 | |
f7bc9594 RR |
895 | if (out) |
896 | sgs[out_num++] = out; | |
40cbfc37 | 897 | |
f7bc9594 RR |
898 | /* Add return status. */ |
899 | sg_init_one(&stat, &status, sizeof(status)); | |
d24bae32 | 900 | sgs[out_num] = &stat; |
40cbfc37 | 901 | |
d24bae32 | 902 | BUG_ON(out_num + 1 > ARRAY_SIZE(sgs)); |
903 | BUG_ON(virtqueue_add_sgs(vi->cvq, sgs, out_num, 1, vi, GFP_ATOMIC) < 0); | |
40cbfc37 | 904 | |
67975901 HG |
905 | if (unlikely(!virtqueue_kick(vi->cvq))) |
906 | return status == VIRTIO_NET_OK; | |
40cbfc37 AK |
907 | |
908 | /* Spin for a response, the kick causes an ioport write, trapping | |
909 | * into the hypervisor, so the request should be handled immediately. | |
910 | */ | |
047b9b94 HG |
911 | while (!virtqueue_get_buf(vi->cvq, &tmp) && |
912 | !virtqueue_is_broken(vi->cvq)) | |
40cbfc37 AK |
913 | cpu_relax(); |
914 | ||
915 | return status == VIRTIO_NET_OK; | |
916 | } | |
917 | ||
9c46f6d4 AW |
918 | static int virtnet_set_mac_address(struct net_device *dev, void *p) |
919 | { | |
920 | struct virtnet_info *vi = netdev_priv(dev); | |
921 | struct virtio_device *vdev = vi->vdev; | |
f2f2c8b4 | 922 | int ret; |
7e58d5ae AK |
923 | struct sockaddr *addr = p; |
924 | struct scatterlist sg; | |
9c46f6d4 | 925 | |
7e58d5ae | 926 | ret = eth_prepare_mac_addr_change(dev, p); |
f2f2c8b4 JP |
927 | if (ret) |
928 | return ret; | |
9c46f6d4 | 929 | |
7e58d5ae AK |
930 | if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR)) { |
931 | sg_init_one(&sg, addr->sa_data, dev->addr_len); | |
932 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC, | |
d24bae32 | 933 | VIRTIO_NET_CTRL_MAC_ADDR_SET, &sg)) { |
7e58d5ae AK |
934 | dev_warn(&vdev->dev, |
935 | "Failed to set mac address by vq command.\n"); | |
936 | return -EINVAL; | |
937 | } | |
938 | } else if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) { | |
855e0c52 RR |
939 | unsigned int i; |
940 | ||
941 | /* Naturally, this has an atomicity problem. */ | |
942 | for (i = 0; i < dev->addr_len; i++) | |
943 | virtio_cwrite8(vdev, | |
944 | offsetof(struct virtio_net_config, mac) + | |
945 | i, addr->sa_data[i]); | |
7e58d5ae AK |
946 | } |
947 | ||
948 | eth_commit_mac_addr_change(dev, p); | |
9c46f6d4 AW |
949 | |
950 | return 0; | |
951 | } | |
952 | ||
3fa2a1df | 953 | static struct rtnl_link_stats64 *virtnet_stats(struct net_device *dev, |
954 | struct rtnl_link_stats64 *tot) | |
955 | { | |
956 | struct virtnet_info *vi = netdev_priv(dev); | |
957 | int cpu; | |
958 | unsigned int start; | |
959 | ||
960 | for_each_possible_cpu(cpu) { | |
58472a76 | 961 | struct virtnet_stats *stats = per_cpu_ptr(vi->stats, cpu); |
3fa2a1df | 962 | u64 tpackets, tbytes, rpackets, rbytes; |
963 | ||
964 | do { | |
e3906486 | 965 | start = u64_stats_fetch_begin_bh(&stats->tx_syncp); |
3fa2a1df | 966 | tpackets = stats->tx_packets; |
967 | tbytes = stats->tx_bytes; | |
e3906486 | 968 | } while (u64_stats_fetch_retry_bh(&stats->tx_syncp, start)); |
83a27052 ED |
969 | |
970 | do { | |
e3906486 | 971 | start = u64_stats_fetch_begin_bh(&stats->rx_syncp); |
3fa2a1df | 972 | rpackets = stats->rx_packets; |
973 | rbytes = stats->rx_bytes; | |
e3906486 | 974 | } while (u64_stats_fetch_retry_bh(&stats->rx_syncp, start)); |
3fa2a1df | 975 | |
976 | tot->rx_packets += rpackets; | |
977 | tot->tx_packets += tpackets; | |
978 | tot->rx_bytes += rbytes; | |
979 | tot->tx_bytes += tbytes; | |
980 | } | |
981 | ||
982 | tot->tx_dropped = dev->stats.tx_dropped; | |
021ac8d3 | 983 | tot->tx_fifo_errors = dev->stats.tx_fifo_errors; |
3fa2a1df | 984 | tot->rx_dropped = dev->stats.rx_dropped; |
985 | tot->rx_length_errors = dev->stats.rx_length_errors; | |
986 | tot->rx_frame_errors = dev->stats.rx_frame_errors; | |
987 | ||
988 | return tot; | |
989 | } | |
990 | ||
da74e89d AS |
991 | #ifdef CONFIG_NET_POLL_CONTROLLER |
992 | static void virtnet_netpoll(struct net_device *dev) | |
993 | { | |
994 | struct virtnet_info *vi = netdev_priv(dev); | |
986a4f4d | 995 | int i; |
da74e89d | 996 | |
986a4f4d JW |
997 | for (i = 0; i < vi->curr_queue_pairs; i++) |
998 | napi_schedule(&vi->rq[i].napi); | |
da74e89d AS |
999 | } |
1000 | #endif | |
1001 | ||
586d17c5 JW |
1002 | static void virtnet_ack_link_announce(struct virtnet_info *vi) |
1003 | { | |
1004 | rtnl_lock(); | |
1005 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_ANNOUNCE, | |
d24bae32 | 1006 | VIRTIO_NET_CTRL_ANNOUNCE_ACK, NULL)) |
586d17c5 JW |
1007 | dev_warn(&vi->dev->dev, "Failed to ack link announce.\n"); |
1008 | rtnl_unlock(); | |
1009 | } | |
1010 | ||
986a4f4d JW |
1011 | static int virtnet_set_queues(struct virtnet_info *vi, u16 queue_pairs) |
1012 | { | |
1013 | struct scatterlist sg; | |
1014 | struct virtio_net_ctrl_mq s; | |
1015 | struct net_device *dev = vi->dev; | |
1016 | ||
1017 | if (!vi->has_cvq || !virtio_has_feature(vi->vdev, VIRTIO_NET_F_MQ)) | |
1018 | return 0; | |
1019 | ||
1020 | s.virtqueue_pairs = queue_pairs; | |
1021 | sg_init_one(&sg, &s, sizeof(s)); | |
1022 | ||
1023 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MQ, | |
d24bae32 | 1024 | VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &sg)) { |
986a4f4d JW |
1025 | dev_warn(&dev->dev, "Fail to set num of queue pairs to %d\n", |
1026 | queue_pairs); | |
1027 | return -EINVAL; | |
55257d72 | 1028 | } else { |
986a4f4d | 1029 | vi->curr_queue_pairs = queue_pairs; |
35ed159b JW |
1030 | /* virtnet_open() will refill when device is going to up. */ |
1031 | if (dev->flags & IFF_UP) | |
1032 | schedule_delayed_work(&vi->refill, 0); | |
55257d72 | 1033 | } |
986a4f4d JW |
1034 | |
1035 | return 0; | |
1036 | } | |
1037 | ||
296f96fc RR |
1038 | static int virtnet_close(struct net_device *dev) |
1039 | { | |
1040 | struct virtnet_info *vi = netdev_priv(dev); | |
986a4f4d | 1041 | int i; |
296f96fc | 1042 | |
b2baed69 RR |
1043 | /* Make sure refill_work doesn't re-enable napi! */ |
1044 | cancel_delayed_work_sync(&vi->refill); | |
986a4f4d JW |
1045 | |
1046 | for (i = 0; i < vi->max_queue_pairs; i++) | |
1047 | napi_disable(&vi->rq[i].napi); | |
296f96fc | 1048 | |
296f96fc RR |
1049 | return 0; |
1050 | } | |
1051 | ||
2af7698e AW |
1052 | static void virtnet_set_rx_mode(struct net_device *dev) |
1053 | { | |
1054 | struct virtnet_info *vi = netdev_priv(dev); | |
f565a7c2 | 1055 | struct scatterlist sg[2]; |
2af7698e | 1056 | u8 promisc, allmulti; |
f565a7c2 | 1057 | struct virtio_net_ctrl_mac *mac_data; |
ccffad25 | 1058 | struct netdev_hw_addr *ha; |
32e7bfc4 | 1059 | int uc_count; |
4cd24eaf | 1060 | int mc_count; |
f565a7c2 AW |
1061 | void *buf; |
1062 | int i; | |
2af7698e AW |
1063 | |
1064 | /* We can't dynamicaly set ndo_set_rx_mode, so return gracefully */ | |
1065 | if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_RX)) | |
1066 | return; | |
1067 | ||
f565a7c2 AW |
1068 | promisc = ((dev->flags & IFF_PROMISC) != 0); |
1069 | allmulti = ((dev->flags & IFF_ALLMULTI) != 0); | |
2af7698e | 1070 | |
23e258e1 | 1071 | sg_init_one(sg, &promisc, sizeof(promisc)); |
2af7698e AW |
1072 | |
1073 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX, | |
d24bae32 | 1074 | VIRTIO_NET_CTRL_RX_PROMISC, sg)) |
2af7698e AW |
1075 | dev_warn(&dev->dev, "Failed to %sable promisc mode.\n", |
1076 | promisc ? "en" : "dis"); | |
1077 | ||
23e258e1 | 1078 | sg_init_one(sg, &allmulti, sizeof(allmulti)); |
2af7698e AW |
1079 | |
1080 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX, | |
d24bae32 | 1081 | VIRTIO_NET_CTRL_RX_ALLMULTI, sg)) |
2af7698e AW |
1082 | dev_warn(&dev->dev, "Failed to %sable allmulti mode.\n", |
1083 | allmulti ? "en" : "dis"); | |
f565a7c2 | 1084 | |
32e7bfc4 | 1085 | uc_count = netdev_uc_count(dev); |
4cd24eaf | 1086 | mc_count = netdev_mc_count(dev); |
f565a7c2 | 1087 | /* MAC filter - use one buffer for both lists */ |
4cd24eaf JP |
1088 | buf = kzalloc(((uc_count + mc_count) * ETH_ALEN) + |
1089 | (2 * sizeof(mac_data->entries)), GFP_ATOMIC); | |
1090 | mac_data = buf; | |
e68ed8f0 | 1091 | if (!buf) |
f565a7c2 | 1092 | return; |
f565a7c2 | 1093 | |
23e258e1 AW |
1094 | sg_init_table(sg, 2); |
1095 | ||
f565a7c2 | 1096 | /* Store the unicast list and count in the front of the buffer */ |
32e7bfc4 | 1097 | mac_data->entries = uc_count; |
ccffad25 | 1098 | i = 0; |
32e7bfc4 | 1099 | netdev_for_each_uc_addr(ha, dev) |
ccffad25 | 1100 | memcpy(&mac_data->macs[i++][0], ha->addr, ETH_ALEN); |
f565a7c2 AW |
1101 | |
1102 | sg_set_buf(&sg[0], mac_data, | |
32e7bfc4 | 1103 | sizeof(mac_data->entries) + (uc_count * ETH_ALEN)); |
f565a7c2 AW |
1104 | |
1105 | /* multicast list and count fill the end */ | |
32e7bfc4 | 1106 | mac_data = (void *)&mac_data->macs[uc_count][0]; |
f565a7c2 | 1107 | |
4cd24eaf | 1108 | mac_data->entries = mc_count; |
567ec874 | 1109 | i = 0; |
22bedad3 JP |
1110 | netdev_for_each_mc_addr(ha, dev) |
1111 | memcpy(&mac_data->macs[i++][0], ha->addr, ETH_ALEN); | |
f565a7c2 AW |
1112 | |
1113 | sg_set_buf(&sg[1], mac_data, | |
4cd24eaf | 1114 | sizeof(mac_data->entries) + (mc_count * ETH_ALEN)); |
f565a7c2 AW |
1115 | |
1116 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC, | |
d24bae32 | 1117 | VIRTIO_NET_CTRL_MAC_TABLE_SET, sg)) |
99e872ae | 1118 | dev_warn(&dev->dev, "Failed to set MAC filter table.\n"); |
f565a7c2 AW |
1119 | |
1120 | kfree(buf); | |
2af7698e AW |
1121 | } |
1122 | ||
80d5c368 PM |
1123 | static int virtnet_vlan_rx_add_vid(struct net_device *dev, |
1124 | __be16 proto, u16 vid) | |
0bde9569 AW |
1125 | { |
1126 | struct virtnet_info *vi = netdev_priv(dev); | |
1127 | struct scatterlist sg; | |
1128 | ||
23e258e1 | 1129 | sg_init_one(&sg, &vid, sizeof(vid)); |
0bde9569 AW |
1130 | |
1131 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN, | |
d24bae32 | 1132 | VIRTIO_NET_CTRL_VLAN_ADD, &sg)) |
0bde9569 | 1133 | dev_warn(&dev->dev, "Failed to add VLAN ID %d.\n", vid); |
8e586137 | 1134 | return 0; |
0bde9569 AW |
1135 | } |
1136 | ||
80d5c368 PM |
1137 | static int virtnet_vlan_rx_kill_vid(struct net_device *dev, |
1138 | __be16 proto, u16 vid) | |
0bde9569 AW |
1139 | { |
1140 | struct virtnet_info *vi = netdev_priv(dev); | |
1141 | struct scatterlist sg; | |
1142 | ||
23e258e1 | 1143 | sg_init_one(&sg, &vid, sizeof(vid)); |
0bde9569 AW |
1144 | |
1145 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN, | |
d24bae32 | 1146 | VIRTIO_NET_CTRL_VLAN_DEL, &sg)) |
0bde9569 | 1147 | dev_warn(&dev->dev, "Failed to kill VLAN ID %d.\n", vid); |
8e586137 | 1148 | return 0; |
0bde9569 AW |
1149 | } |
1150 | ||
8898c21c | 1151 | static void virtnet_clean_affinity(struct virtnet_info *vi, long hcpu) |
986a4f4d JW |
1152 | { |
1153 | int i; | |
1154 | ||
8898c21c WG |
1155 | if (vi->affinity_hint_set) { |
1156 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
47be2479 WG |
1157 | virtqueue_set_affinity(vi->rq[i].vq, -1); |
1158 | virtqueue_set_affinity(vi->sq[i].vq, -1); | |
1159 | } | |
1160 | ||
8898c21c WG |
1161 | vi->affinity_hint_set = false; |
1162 | } | |
8898c21c | 1163 | } |
47be2479 | 1164 | |
8898c21c WG |
1165 | static void virtnet_set_affinity(struct virtnet_info *vi) |
1166 | { | |
1167 | int i; | |
1168 | int cpu; | |
986a4f4d JW |
1169 | |
1170 | /* In multiqueue mode, when the number of cpu is equal to the number of | |
1171 | * queue pairs, we let the queue pairs to be private to one cpu by | |
1172 | * setting the affinity hint to eliminate the contention. | |
1173 | */ | |
8898c21c WG |
1174 | if (vi->curr_queue_pairs == 1 || |
1175 | vi->max_queue_pairs != num_online_cpus()) { | |
1176 | virtnet_clean_affinity(vi, -1); | |
1177 | return; | |
986a4f4d JW |
1178 | } |
1179 | ||
8898c21c WG |
1180 | i = 0; |
1181 | for_each_online_cpu(cpu) { | |
986a4f4d JW |
1182 | virtqueue_set_affinity(vi->rq[i].vq, cpu); |
1183 | virtqueue_set_affinity(vi->sq[i].vq, cpu); | |
9bb8ca86 | 1184 | netif_set_xps_queue(vi->dev, cpumask_of(cpu), i); |
8898c21c | 1185 | i++; |
986a4f4d JW |
1186 | } |
1187 | ||
8898c21c | 1188 | vi->affinity_hint_set = true; |
986a4f4d JW |
1189 | } |
1190 | ||
8de4b2f3 WG |
1191 | static int virtnet_cpu_callback(struct notifier_block *nfb, |
1192 | unsigned long action, void *hcpu) | |
1193 | { | |
1194 | struct virtnet_info *vi = container_of(nfb, struct virtnet_info, nb); | |
1195 | ||
1196 | switch(action & ~CPU_TASKS_FROZEN) { | |
1197 | case CPU_ONLINE: | |
1198 | case CPU_DOWN_FAILED: | |
1199 | case CPU_DEAD: | |
1200 | virtnet_set_affinity(vi); | |
1201 | break; | |
1202 | case CPU_DOWN_PREPARE: | |
1203 | virtnet_clean_affinity(vi, (long)hcpu); | |
1204 | break; | |
1205 | default: | |
1206 | break; | |
1207 | } | |
3ab098df | 1208 | |
8de4b2f3 | 1209 | return NOTIFY_OK; |
986a4f4d JW |
1210 | } |
1211 | ||
8f9f4668 RJ |
1212 | static void virtnet_get_ringparam(struct net_device *dev, |
1213 | struct ethtool_ringparam *ring) | |
1214 | { | |
1215 | struct virtnet_info *vi = netdev_priv(dev); | |
1216 | ||
986a4f4d JW |
1217 | ring->rx_max_pending = virtqueue_get_vring_size(vi->rq[0].vq); |
1218 | ring->tx_max_pending = virtqueue_get_vring_size(vi->sq[0].vq); | |
8f9f4668 RJ |
1219 | ring->rx_pending = ring->rx_max_pending; |
1220 | ring->tx_pending = ring->tx_max_pending; | |
8f9f4668 RJ |
1221 | } |
1222 | ||
66846048 RJ |
1223 | |
1224 | static void virtnet_get_drvinfo(struct net_device *dev, | |
1225 | struct ethtool_drvinfo *info) | |
1226 | { | |
1227 | struct virtnet_info *vi = netdev_priv(dev); | |
1228 | struct virtio_device *vdev = vi->vdev; | |
1229 | ||
1230 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); | |
1231 | strlcpy(info->version, VIRTNET_DRIVER_VERSION, sizeof(info->version)); | |
1232 | strlcpy(info->bus_info, virtio_bus_name(vdev), sizeof(info->bus_info)); | |
1233 | ||
1234 | } | |
1235 | ||
d73bcd2c JW |
1236 | /* TODO: Eliminate OOO packets during switching */ |
1237 | static int virtnet_set_channels(struct net_device *dev, | |
1238 | struct ethtool_channels *channels) | |
1239 | { | |
1240 | struct virtnet_info *vi = netdev_priv(dev); | |
1241 | u16 queue_pairs = channels->combined_count; | |
1242 | int err; | |
1243 | ||
1244 | /* We don't support separate rx/tx channels. | |
1245 | * We don't allow setting 'other' channels. | |
1246 | */ | |
1247 | if (channels->rx_count || channels->tx_count || channels->other_count) | |
1248 | return -EINVAL; | |
1249 | ||
1250 | if (queue_pairs > vi->max_queue_pairs) | |
1251 | return -EINVAL; | |
1252 | ||
47be2479 | 1253 | get_online_cpus(); |
d73bcd2c JW |
1254 | err = virtnet_set_queues(vi, queue_pairs); |
1255 | if (!err) { | |
1256 | netif_set_real_num_tx_queues(dev, queue_pairs); | |
1257 | netif_set_real_num_rx_queues(dev, queue_pairs); | |
1258 | ||
8898c21c | 1259 | virtnet_set_affinity(vi); |
d73bcd2c | 1260 | } |
47be2479 | 1261 | put_online_cpus(); |
d73bcd2c JW |
1262 | |
1263 | return err; | |
1264 | } | |
1265 | ||
1266 | static void virtnet_get_channels(struct net_device *dev, | |
1267 | struct ethtool_channels *channels) | |
1268 | { | |
1269 | struct virtnet_info *vi = netdev_priv(dev); | |
1270 | ||
1271 | channels->combined_count = vi->curr_queue_pairs; | |
1272 | channels->max_combined = vi->max_queue_pairs; | |
1273 | channels->max_other = 0; | |
1274 | channels->rx_count = 0; | |
1275 | channels->tx_count = 0; | |
1276 | channels->other_count = 0; | |
1277 | } | |
1278 | ||
0fc0b732 | 1279 | static const struct ethtool_ops virtnet_ethtool_ops = { |
66846048 | 1280 | .get_drvinfo = virtnet_get_drvinfo, |
9f4d26d0 | 1281 | .get_link = ethtool_op_get_link, |
8f9f4668 | 1282 | .get_ringparam = virtnet_get_ringparam, |
d73bcd2c JW |
1283 | .set_channels = virtnet_set_channels, |
1284 | .get_channels = virtnet_get_channels, | |
a9ea3fc6 HX |
1285 | }; |
1286 | ||
39da5814 MM |
1287 | #define MIN_MTU 68 |
1288 | #define MAX_MTU 65535 | |
1289 | ||
1290 | static int virtnet_change_mtu(struct net_device *dev, int new_mtu) | |
1291 | { | |
1292 | if (new_mtu < MIN_MTU || new_mtu > MAX_MTU) | |
1293 | return -EINVAL; | |
1294 | dev->mtu = new_mtu; | |
1295 | return 0; | |
1296 | } | |
1297 | ||
76288b4e SH |
1298 | static const struct net_device_ops virtnet_netdev = { |
1299 | .ndo_open = virtnet_open, | |
1300 | .ndo_stop = virtnet_close, | |
1301 | .ndo_start_xmit = start_xmit, | |
1302 | .ndo_validate_addr = eth_validate_addr, | |
9c46f6d4 | 1303 | .ndo_set_mac_address = virtnet_set_mac_address, |
2af7698e | 1304 | .ndo_set_rx_mode = virtnet_set_rx_mode, |
76288b4e | 1305 | .ndo_change_mtu = virtnet_change_mtu, |
3fa2a1df | 1306 | .ndo_get_stats64 = virtnet_stats, |
1824a989 AW |
1307 | .ndo_vlan_rx_add_vid = virtnet_vlan_rx_add_vid, |
1308 | .ndo_vlan_rx_kill_vid = virtnet_vlan_rx_kill_vid, | |
76288b4e SH |
1309 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1310 | .ndo_poll_controller = virtnet_netpoll, | |
1311 | #endif | |
1312 | }; | |
1313 | ||
586d17c5 | 1314 | static void virtnet_config_changed_work(struct work_struct *work) |
9f4d26d0 | 1315 | { |
586d17c5 JW |
1316 | struct virtnet_info *vi = |
1317 | container_of(work, struct virtnet_info, config_work); | |
9f4d26d0 MM |
1318 | u16 v; |
1319 | ||
586d17c5 JW |
1320 | mutex_lock(&vi->config_lock); |
1321 | if (!vi->config_enable) | |
1322 | goto done; | |
1323 | ||
855e0c52 RR |
1324 | if (virtio_cread_feature(vi->vdev, VIRTIO_NET_F_STATUS, |
1325 | struct virtio_net_config, status, &v) < 0) | |
586d17c5 JW |
1326 | goto done; |
1327 | ||
1328 | if (v & VIRTIO_NET_S_ANNOUNCE) { | |
ee89bab1 | 1329 | netdev_notify_peers(vi->dev); |
586d17c5 JW |
1330 | virtnet_ack_link_announce(vi); |
1331 | } | |
9f4d26d0 MM |
1332 | |
1333 | /* Ignore unknown (future) status bits */ | |
1334 | v &= VIRTIO_NET_S_LINK_UP; | |
1335 | ||
1336 | if (vi->status == v) | |
586d17c5 | 1337 | goto done; |
9f4d26d0 MM |
1338 | |
1339 | vi->status = v; | |
1340 | ||
1341 | if (vi->status & VIRTIO_NET_S_LINK_UP) { | |
1342 | netif_carrier_on(vi->dev); | |
986a4f4d | 1343 | netif_tx_wake_all_queues(vi->dev); |
9f4d26d0 MM |
1344 | } else { |
1345 | netif_carrier_off(vi->dev); | |
986a4f4d | 1346 | netif_tx_stop_all_queues(vi->dev); |
9f4d26d0 | 1347 | } |
586d17c5 JW |
1348 | done: |
1349 | mutex_unlock(&vi->config_lock); | |
9f4d26d0 MM |
1350 | } |
1351 | ||
1352 | static void virtnet_config_changed(struct virtio_device *vdev) | |
1353 | { | |
1354 | struct virtnet_info *vi = vdev->priv; | |
1355 | ||
3b07e9ca | 1356 | schedule_work(&vi->config_work); |
9f4d26d0 MM |
1357 | } |
1358 | ||
986a4f4d JW |
1359 | static void virtnet_free_queues(struct virtnet_info *vi) |
1360 | { | |
d4fb84ee AV |
1361 | int i; |
1362 | ||
1363 | for (i = 0; i < vi->max_queue_pairs; i++) | |
1364 | netif_napi_del(&vi->rq[i].napi); | |
1365 | ||
986a4f4d JW |
1366 | kfree(vi->rq); |
1367 | kfree(vi->sq); | |
1368 | } | |
1369 | ||
1370 | static void free_receive_bufs(struct virtnet_info *vi) | |
1371 | { | |
1372 | int i; | |
1373 | ||
1374 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1375 | while (vi->rq[i].pages) | |
1376 | __free_pages(get_a_page(&vi->rq[i], GFP_KERNEL), 0); | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | static void free_unused_bufs(struct virtnet_info *vi) | |
1381 | { | |
1382 | void *buf; | |
1383 | int i; | |
1384 | ||
1385 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1386 | struct virtqueue *vq = vi->sq[i].vq; | |
1387 | while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) | |
1388 | dev_kfree_skb(buf); | |
1389 | } | |
1390 | ||
1391 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1392 | struct virtqueue *vq = vi->rq[i].vq; | |
1393 | ||
1394 | while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) { | |
fa9fac17 | 1395 | if (vi->mergeable_rx_bufs) |
2613af0e | 1396 | put_page(virt_to_head_page(buf)); |
fa9fac17 AV |
1397 | else if (vi->big_packets) |
1398 | give_pages(&vi->rq[i], buf); | |
986a4f4d JW |
1399 | else |
1400 | dev_kfree_skb(buf); | |
1401 | --vi->rq[i].num; | |
1402 | } | |
1403 | BUG_ON(vi->rq[i].num != 0); | |
1404 | } | |
1405 | } | |
1406 | ||
e9d7417b JW |
1407 | static void virtnet_del_vqs(struct virtnet_info *vi) |
1408 | { | |
1409 | struct virtio_device *vdev = vi->vdev; | |
1410 | ||
8898c21c | 1411 | virtnet_clean_affinity(vi, -1); |
986a4f4d | 1412 | |
e9d7417b | 1413 | vdev->config->del_vqs(vdev); |
986a4f4d JW |
1414 | |
1415 | virtnet_free_queues(vi); | |
e9d7417b JW |
1416 | } |
1417 | ||
986a4f4d | 1418 | static int virtnet_find_vqs(struct virtnet_info *vi) |
3f9c10b0 | 1419 | { |
986a4f4d JW |
1420 | vq_callback_t **callbacks; |
1421 | struct virtqueue **vqs; | |
1422 | int ret = -ENOMEM; | |
1423 | int i, total_vqs; | |
1424 | const char **names; | |
1425 | ||
1426 | /* We expect 1 RX virtqueue followed by 1 TX virtqueue, followed by | |
1427 | * possible N-1 RX/TX queue pairs used in multiqueue mode, followed by | |
1428 | * possible control vq. | |
1429 | */ | |
1430 | total_vqs = vi->max_queue_pairs * 2 + | |
1431 | virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ); | |
1432 | ||
1433 | /* Allocate space for find_vqs parameters */ | |
1434 | vqs = kzalloc(total_vqs * sizeof(*vqs), GFP_KERNEL); | |
1435 | if (!vqs) | |
1436 | goto err_vq; | |
1437 | callbacks = kmalloc(total_vqs * sizeof(*callbacks), GFP_KERNEL); | |
1438 | if (!callbacks) | |
1439 | goto err_callback; | |
1440 | names = kmalloc(total_vqs * sizeof(*names), GFP_KERNEL); | |
1441 | if (!names) | |
1442 | goto err_names; | |
1443 | ||
1444 | /* Parameters for control virtqueue, if any */ | |
1445 | if (vi->has_cvq) { | |
1446 | callbacks[total_vqs - 1] = NULL; | |
1447 | names[total_vqs - 1] = "control"; | |
1448 | } | |
3f9c10b0 | 1449 | |
986a4f4d JW |
1450 | /* Allocate/initialize parameters for send/receive virtqueues */ |
1451 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1452 | callbacks[rxq2vq(i)] = skb_recv_done; | |
1453 | callbacks[txq2vq(i)] = skb_xmit_done; | |
1454 | sprintf(vi->rq[i].name, "input.%d", i); | |
1455 | sprintf(vi->sq[i].name, "output.%d", i); | |
1456 | names[rxq2vq(i)] = vi->rq[i].name; | |
1457 | names[txq2vq(i)] = vi->sq[i].name; | |
1458 | } | |
3f9c10b0 | 1459 | |
986a4f4d JW |
1460 | ret = vi->vdev->config->find_vqs(vi->vdev, total_vqs, vqs, callbacks, |
1461 | names); | |
1462 | if (ret) | |
1463 | goto err_find; | |
3f9c10b0 | 1464 | |
986a4f4d JW |
1465 | if (vi->has_cvq) { |
1466 | vi->cvq = vqs[total_vqs - 1]; | |
3f9c10b0 | 1467 | if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VLAN)) |
f646968f | 1468 | vi->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; |
3f9c10b0 | 1469 | } |
986a4f4d JW |
1470 | |
1471 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1472 | vi->rq[i].vq = vqs[rxq2vq(i)]; | |
1473 | vi->sq[i].vq = vqs[txq2vq(i)]; | |
1474 | } | |
1475 | ||
1476 | kfree(names); | |
1477 | kfree(callbacks); | |
1478 | kfree(vqs); | |
1479 | ||
3f9c10b0 | 1480 | return 0; |
986a4f4d JW |
1481 | |
1482 | err_find: | |
1483 | kfree(names); | |
1484 | err_names: | |
1485 | kfree(callbacks); | |
1486 | err_callback: | |
1487 | kfree(vqs); | |
1488 | err_vq: | |
1489 | return ret; | |
1490 | } | |
1491 | ||
1492 | static int virtnet_alloc_queues(struct virtnet_info *vi) | |
1493 | { | |
1494 | int i; | |
1495 | ||
1496 | vi->sq = kzalloc(sizeof(*vi->sq) * vi->max_queue_pairs, GFP_KERNEL); | |
1497 | if (!vi->sq) | |
1498 | goto err_sq; | |
1499 | vi->rq = kzalloc(sizeof(*vi->rq) * vi->max_queue_pairs, GFP_KERNEL); | |
008d4278 | 1500 | if (!vi->rq) |
986a4f4d JW |
1501 | goto err_rq; |
1502 | ||
1503 | INIT_DELAYED_WORK(&vi->refill, refill_work); | |
1504 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1505 | vi->rq[i].pages = NULL; | |
1506 | netif_napi_add(vi->dev, &vi->rq[i].napi, virtnet_poll, | |
1507 | napi_weight); | |
1508 | ||
1509 | sg_init_table(vi->rq[i].sg, ARRAY_SIZE(vi->rq[i].sg)); | |
1510 | sg_init_table(vi->sq[i].sg, ARRAY_SIZE(vi->sq[i].sg)); | |
1511 | } | |
1512 | ||
1513 | return 0; | |
1514 | ||
1515 | err_rq: | |
1516 | kfree(vi->sq); | |
1517 | err_sq: | |
1518 | return -ENOMEM; | |
1519 | } | |
1520 | ||
1521 | static int init_vqs(struct virtnet_info *vi) | |
1522 | { | |
1523 | int ret; | |
1524 | ||
1525 | /* Allocate send & receive queues */ | |
1526 | ret = virtnet_alloc_queues(vi); | |
1527 | if (ret) | |
1528 | goto err; | |
1529 | ||
1530 | ret = virtnet_find_vqs(vi); | |
1531 | if (ret) | |
1532 | goto err_free; | |
1533 | ||
47be2479 | 1534 | get_online_cpus(); |
8898c21c | 1535 | virtnet_set_affinity(vi); |
47be2479 WG |
1536 | put_online_cpus(); |
1537 | ||
986a4f4d JW |
1538 | return 0; |
1539 | ||
1540 | err_free: | |
1541 | virtnet_free_queues(vi); | |
1542 | err: | |
1543 | return ret; | |
3f9c10b0 AS |
1544 | } |
1545 | ||
296f96fc RR |
1546 | static int virtnet_probe(struct virtio_device *vdev) |
1547 | { | |
986a4f4d | 1548 | int i, err; |
296f96fc RR |
1549 | struct net_device *dev; |
1550 | struct virtnet_info *vi; | |
986a4f4d JW |
1551 | u16 max_queue_pairs; |
1552 | ||
1553 | /* Find if host supports multiqueue virtio_net device */ | |
855e0c52 RR |
1554 | err = virtio_cread_feature(vdev, VIRTIO_NET_F_MQ, |
1555 | struct virtio_net_config, | |
1556 | max_virtqueue_pairs, &max_queue_pairs); | |
986a4f4d JW |
1557 | |
1558 | /* We need at least 2 queue's */ | |
1559 | if (err || max_queue_pairs < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || | |
1560 | max_queue_pairs > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || | |
1561 | !virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) | |
1562 | max_queue_pairs = 1; | |
296f96fc RR |
1563 | |
1564 | /* Allocate ourselves a network device with room for our info */ | |
986a4f4d | 1565 | dev = alloc_etherdev_mq(sizeof(struct virtnet_info), max_queue_pairs); |
296f96fc RR |
1566 | if (!dev) |
1567 | return -ENOMEM; | |
1568 | ||
1569 | /* Set up network device as normal. */ | |
f2f2c8b4 | 1570 | dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; |
76288b4e | 1571 | dev->netdev_ops = &virtnet_netdev; |
296f96fc | 1572 | dev->features = NETIF_F_HIGHDMA; |
3fa2a1df | 1573 | |
a9ea3fc6 | 1574 | SET_ETHTOOL_OPS(dev, &virtnet_ethtool_ops); |
296f96fc RR |
1575 | SET_NETDEV_DEV(dev, &vdev->dev); |
1576 | ||
1577 | /* Do we support "hardware" checksums? */ | |
98e778c9 | 1578 | if (virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) { |
296f96fc | 1579 | /* This opens up the world of extra features. */ |
98e778c9 MM |
1580 | dev->hw_features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; |
1581 | if (csum) | |
1582 | dev->features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; | |
1583 | ||
1584 | if (virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) { | |
1585 | dev->hw_features |= NETIF_F_TSO | NETIF_F_UFO | |
34a48579 RR |
1586 | | NETIF_F_TSO_ECN | NETIF_F_TSO6; |
1587 | } | |
5539ae96 | 1588 | /* Individual feature bits: what can host handle? */ |
98e778c9 MM |
1589 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO4)) |
1590 | dev->hw_features |= NETIF_F_TSO; | |
1591 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO6)) | |
1592 | dev->hw_features |= NETIF_F_TSO6; | |
1593 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN)) | |
1594 | dev->hw_features |= NETIF_F_TSO_ECN; | |
1595 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_UFO)) | |
1596 | dev->hw_features |= NETIF_F_UFO; | |
1597 | ||
1598 | if (gso) | |
1599 | dev->features |= dev->hw_features & (NETIF_F_ALL_TSO|NETIF_F_UFO); | |
1600 | /* (!csum && gso) case will be fixed by register_netdev() */ | |
296f96fc | 1601 | } |
4f49129b TH |
1602 | if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_CSUM)) |
1603 | dev->features |= NETIF_F_RXCSUM; | |
296f96fc | 1604 | |
4fda8302 JW |
1605 | dev->vlan_features = dev->features; |
1606 | ||
296f96fc | 1607 | /* Configuration may specify what MAC to use. Otherwise random. */ |
855e0c52 RR |
1608 | if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) |
1609 | virtio_cread_bytes(vdev, | |
1610 | offsetof(struct virtio_net_config, mac), | |
1611 | dev->dev_addr, dev->addr_len); | |
1612 | else | |
f2cedb63 | 1613 | eth_hw_addr_random(dev); |
296f96fc RR |
1614 | |
1615 | /* Set up our device-specific information */ | |
1616 | vi = netdev_priv(dev); | |
296f96fc RR |
1617 | vi->dev = dev; |
1618 | vi->vdev = vdev; | |
d9d5dcc8 | 1619 | vdev->priv = vi; |
3fa2a1df | 1620 | vi->stats = alloc_percpu(struct virtnet_stats); |
1621 | err = -ENOMEM; | |
1622 | if (vi->stats == NULL) | |
1623 | goto free; | |
1624 | ||
827da44c JS |
1625 | for_each_possible_cpu(i) { |
1626 | struct virtnet_stats *virtnet_stats; | |
1627 | virtnet_stats = per_cpu_ptr(vi->stats, i); | |
1628 | u64_stats_init(&virtnet_stats->tx_syncp); | |
1629 | u64_stats_init(&virtnet_stats->rx_syncp); | |
1630 | } | |
1631 | ||
586d17c5 JW |
1632 | mutex_init(&vi->config_lock); |
1633 | vi->config_enable = true; | |
1634 | INIT_WORK(&vi->config_work, virtnet_config_changed_work); | |
296f96fc | 1635 | |
97402b96 | 1636 | /* If we can receive ANY GSO packets, we must allocate large ones. */ |
8e95a202 JP |
1637 | if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) || |
1638 | virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6) || | |
1639 | virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ECN)) | |
97402b96 HX |
1640 | vi->big_packets = true; |
1641 | ||
3f2c31d9 MM |
1642 | if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF)) |
1643 | vi->mergeable_rx_bufs = true; | |
1644 | ||
e7428e95 MT |
1645 | if (virtio_has_feature(vdev, VIRTIO_F_ANY_LAYOUT)) |
1646 | vi->any_header_sg = true; | |
1647 | ||
986a4f4d JW |
1648 | if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) |
1649 | vi->has_cvq = true; | |
1650 | ||
1651 | /* Use single tx/rx queue pair as default */ | |
1652 | vi->curr_queue_pairs = 1; | |
1653 | vi->max_queue_pairs = max_queue_pairs; | |
1654 | ||
1655 | /* Allocate/initialize the rx/tx queues, and invoke find_vqs */ | |
3f9c10b0 | 1656 | err = init_vqs(vi); |
d2a7ddda | 1657 | if (err) |
9bb8ca86 | 1658 | goto free_stats; |
296f96fc | 1659 | |
0f13b66b ZYW |
1660 | netif_set_real_num_tx_queues(dev, vi->curr_queue_pairs); |
1661 | netif_set_real_num_rx_queues(dev, vi->curr_queue_pairs); | |
986a4f4d | 1662 | |
296f96fc RR |
1663 | err = register_netdev(dev); |
1664 | if (err) { | |
1665 | pr_debug("virtio_net: registering device failed\n"); | |
d2a7ddda | 1666 | goto free_vqs; |
296f96fc | 1667 | } |
b3369c1f RR |
1668 | |
1669 | /* Last of all, set up some receive buffers. */ | |
55257d72 | 1670 | for (i = 0; i < vi->curr_queue_pairs; i++) { |
986a4f4d JW |
1671 | try_fill_recv(&vi->rq[i], GFP_KERNEL); |
1672 | ||
1673 | /* If we didn't even get one input buffer, we're useless. */ | |
1674 | if (vi->rq[i].num == 0) { | |
1675 | free_unused_bufs(vi); | |
1676 | err = -ENOMEM; | |
1677 | goto free_recv_bufs; | |
1678 | } | |
b3369c1f RR |
1679 | } |
1680 | ||
8de4b2f3 WG |
1681 | vi->nb.notifier_call = &virtnet_cpu_callback; |
1682 | err = register_hotcpu_notifier(&vi->nb); | |
1683 | if (err) { | |
1684 | pr_debug("virtio_net: registering cpu notifier failed\n"); | |
1685 | goto free_recv_bufs; | |
1686 | } | |
1687 | ||
167c25e4 JW |
1688 | /* Assume link up if device can't report link status, |
1689 | otherwise get link status from config. */ | |
1690 | if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_STATUS)) { | |
1691 | netif_carrier_off(dev); | |
3b07e9ca | 1692 | schedule_work(&vi->config_work); |
167c25e4 JW |
1693 | } else { |
1694 | vi->status = VIRTIO_NET_S_LINK_UP; | |
1695 | netif_carrier_on(dev); | |
1696 | } | |
9f4d26d0 | 1697 | |
986a4f4d JW |
1698 | pr_debug("virtnet: registered device %s with %d RX and TX vq's\n", |
1699 | dev->name, max_queue_pairs); | |
1700 | ||
296f96fc RR |
1701 | return 0; |
1702 | ||
986a4f4d JW |
1703 | free_recv_bufs: |
1704 | free_receive_bufs(vi); | |
b3369c1f | 1705 | unregister_netdev(dev); |
d2a7ddda | 1706 | free_vqs: |
986a4f4d | 1707 | cancel_delayed_work_sync(&vi->refill); |
e9d7417b | 1708 | virtnet_del_vqs(vi); |
2613af0e MD |
1709 | if (vi->alloc_frag.page) |
1710 | put_page(vi->alloc_frag.page); | |
3fa2a1df | 1711 | free_stats: |
1712 | free_percpu(vi->stats); | |
296f96fc RR |
1713 | free: |
1714 | free_netdev(dev); | |
1715 | return err; | |
1716 | } | |
1717 | ||
04486ed0 | 1718 | static void remove_vq_common(struct virtnet_info *vi) |
296f96fc | 1719 | { |
04486ed0 | 1720 | vi->vdev->config->reset(vi->vdev); |
830a8a97 SM |
1721 | |
1722 | /* Free unused buffers in both send and recv, if any. */ | |
9ab86bbc | 1723 | free_unused_bufs(vi); |
fb6813f4 | 1724 | |
986a4f4d | 1725 | free_receive_bufs(vi); |
d2a7ddda | 1726 | |
986a4f4d | 1727 | virtnet_del_vqs(vi); |
04486ed0 AS |
1728 | } |
1729 | ||
8cc085d6 | 1730 | static void virtnet_remove(struct virtio_device *vdev) |
04486ed0 AS |
1731 | { |
1732 | struct virtnet_info *vi = vdev->priv; | |
1733 | ||
8de4b2f3 WG |
1734 | unregister_hotcpu_notifier(&vi->nb); |
1735 | ||
586d17c5 JW |
1736 | /* Prevent config work handler from accessing the device. */ |
1737 | mutex_lock(&vi->config_lock); | |
1738 | vi->config_enable = false; | |
1739 | mutex_unlock(&vi->config_lock); | |
1740 | ||
04486ed0 AS |
1741 | unregister_netdev(vi->dev); |
1742 | ||
1743 | remove_vq_common(vi); | |
2613af0e MD |
1744 | if (vi->alloc_frag.page) |
1745 | put_page(vi->alloc_frag.page); | |
fb6813f4 | 1746 | |
586d17c5 JW |
1747 | flush_work(&vi->config_work); |
1748 | ||
2e66f55b | 1749 | free_percpu(vi->stats); |
74b2553f | 1750 | free_netdev(vi->dev); |
296f96fc RR |
1751 | } |
1752 | ||
89107000 | 1753 | #ifdef CONFIG_PM_SLEEP |
0741bcb5 AS |
1754 | static int virtnet_freeze(struct virtio_device *vdev) |
1755 | { | |
1756 | struct virtnet_info *vi = vdev->priv; | |
986a4f4d | 1757 | int i; |
0741bcb5 | 1758 | |
ec9debbd JW |
1759 | unregister_hotcpu_notifier(&vi->nb); |
1760 | ||
586d17c5 JW |
1761 | /* Prevent config work handler from accessing the device */ |
1762 | mutex_lock(&vi->config_lock); | |
1763 | vi->config_enable = false; | |
1764 | mutex_unlock(&vi->config_lock); | |
1765 | ||
0741bcb5 AS |
1766 | netif_device_detach(vi->dev); |
1767 | cancel_delayed_work_sync(&vi->refill); | |
1768 | ||
1769 | if (netif_running(vi->dev)) | |
986a4f4d JW |
1770 | for (i = 0; i < vi->max_queue_pairs; i++) { |
1771 | napi_disable(&vi->rq[i].napi); | |
1772 | netif_napi_del(&vi->rq[i].napi); | |
1773 | } | |
0741bcb5 AS |
1774 | |
1775 | remove_vq_common(vi); | |
1776 | ||
586d17c5 JW |
1777 | flush_work(&vi->config_work); |
1778 | ||
0741bcb5 AS |
1779 | return 0; |
1780 | } | |
1781 | ||
1782 | static int virtnet_restore(struct virtio_device *vdev) | |
1783 | { | |
1784 | struct virtnet_info *vi = vdev->priv; | |
986a4f4d | 1785 | int err, i; |
0741bcb5 AS |
1786 | |
1787 | err = init_vqs(vi); | |
1788 | if (err) | |
1789 | return err; | |
1790 | ||
1791 | if (netif_running(vi->dev)) | |
986a4f4d JW |
1792 | for (i = 0; i < vi->max_queue_pairs; i++) |
1793 | virtnet_napi_enable(&vi->rq[i]); | |
0741bcb5 AS |
1794 | |
1795 | netif_device_attach(vi->dev); | |
1796 | ||
55257d72 | 1797 | for (i = 0; i < vi->curr_queue_pairs; i++) |
986a4f4d JW |
1798 | if (!try_fill_recv(&vi->rq[i], GFP_KERNEL)) |
1799 | schedule_delayed_work(&vi->refill, 0); | |
0741bcb5 | 1800 | |
586d17c5 JW |
1801 | mutex_lock(&vi->config_lock); |
1802 | vi->config_enable = true; | |
1803 | mutex_unlock(&vi->config_lock); | |
1804 | ||
35ed159b | 1805 | rtnl_lock(); |
986a4f4d | 1806 | virtnet_set_queues(vi, vi->curr_queue_pairs); |
35ed159b | 1807 | rtnl_unlock(); |
986a4f4d | 1808 | |
ec9debbd JW |
1809 | err = register_hotcpu_notifier(&vi->nb); |
1810 | if (err) | |
1811 | return err; | |
1812 | ||
0741bcb5 AS |
1813 | return 0; |
1814 | } | |
1815 | #endif | |
1816 | ||
296f96fc RR |
1817 | static struct virtio_device_id id_table[] = { |
1818 | { VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID }, | |
1819 | { 0 }, | |
1820 | }; | |
1821 | ||
c45a6816 | 1822 | static unsigned int features[] = { |
5e4fe5c4 MM |
1823 | VIRTIO_NET_F_CSUM, VIRTIO_NET_F_GUEST_CSUM, |
1824 | VIRTIO_NET_F_GSO, VIRTIO_NET_F_MAC, | |
c45a6816 | 1825 | VIRTIO_NET_F_HOST_TSO4, VIRTIO_NET_F_HOST_UFO, VIRTIO_NET_F_HOST_TSO6, |
97402b96 | 1826 | VIRTIO_NET_F_HOST_ECN, VIRTIO_NET_F_GUEST_TSO4, VIRTIO_NET_F_GUEST_TSO6, |
5c516751 | 1827 | VIRTIO_NET_F_GUEST_ECN, VIRTIO_NET_F_GUEST_UFO, |
2a41f71d | 1828 | VIRTIO_NET_F_MRG_RXBUF, VIRTIO_NET_F_STATUS, VIRTIO_NET_F_CTRL_VQ, |
0bde9569 | 1829 | VIRTIO_NET_F_CTRL_RX, VIRTIO_NET_F_CTRL_VLAN, |
986a4f4d | 1830 | VIRTIO_NET_F_GUEST_ANNOUNCE, VIRTIO_NET_F_MQ, |
7e58d5ae | 1831 | VIRTIO_NET_F_CTRL_MAC_ADDR, |
e7428e95 | 1832 | VIRTIO_F_ANY_LAYOUT, |
c45a6816 RR |
1833 | }; |
1834 | ||
22402529 | 1835 | static struct virtio_driver virtio_net_driver = { |
c45a6816 RR |
1836 | .feature_table = features, |
1837 | .feature_table_size = ARRAY_SIZE(features), | |
296f96fc RR |
1838 | .driver.name = KBUILD_MODNAME, |
1839 | .driver.owner = THIS_MODULE, | |
1840 | .id_table = id_table, | |
1841 | .probe = virtnet_probe, | |
8cc085d6 | 1842 | .remove = virtnet_remove, |
9f4d26d0 | 1843 | .config_changed = virtnet_config_changed, |
89107000 | 1844 | #ifdef CONFIG_PM_SLEEP |
0741bcb5 AS |
1845 | .freeze = virtnet_freeze, |
1846 | .restore = virtnet_restore, | |
1847 | #endif | |
296f96fc RR |
1848 | }; |
1849 | ||
b2a17029 | 1850 | module_virtio_driver(virtio_net_driver); |
296f96fc RR |
1851 | |
1852 | MODULE_DEVICE_TABLE(virtio, id_table); | |
1853 | MODULE_DESCRIPTION("Virtio network driver"); | |
1854 | MODULE_LICENSE("GPL"); |