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.$index */ | |
65 | char name[40]; | |
e9d7417b JW |
66 | }; |
67 | ||
68 | /* Internal representation of a receive virtqueue */ | |
69 | struct receive_queue { | |
70 | /* Virtqueue associated with this receive_queue */ | |
71 | struct virtqueue *vq; | |
72 | ||
296f96fc RR |
73 | struct napi_struct napi; |
74 | ||
e9d7417b JW |
75 | /* Chain pages by the private ptr. */ |
76 | struct page *pages; | |
77 | ||
78 | /* RX: fragments + linear part + virtio header */ | |
79 | struct scatterlist sg[MAX_SKB_FRAGS + 2]; | |
986a4f4d JW |
80 | |
81 | /* Name of this receive queue: input.$index */ | |
82 | char name[40]; | |
e9d7417b JW |
83 | }; |
84 | ||
85 | struct virtnet_info { | |
86 | struct virtio_device *vdev; | |
87 | struct virtqueue *cvq; | |
88 | struct net_device *dev; | |
986a4f4d JW |
89 | struct send_queue *sq; |
90 | struct receive_queue *rq; | |
e9d7417b JW |
91 | unsigned int status; |
92 | ||
986a4f4d JW |
93 | /* Max # of queue pairs supported by the device */ |
94 | u16 max_queue_pairs; | |
95 | ||
96 | /* # of queue pairs currently used by the driver */ | |
97 | u16 curr_queue_pairs; | |
98 | ||
97402b96 HX |
99 | /* I like... big packets and I cannot lie! */ |
100 | bool big_packets; | |
101 | ||
3f2c31d9 MM |
102 | /* Host will merge rx buffers for big packets (shake it! shake it!) */ |
103 | bool mergeable_rx_bufs; | |
104 | ||
986a4f4d JW |
105 | /* Has control virtqueue */ |
106 | bool has_cvq; | |
107 | ||
e7428e95 MT |
108 | /* Host can handle any s/g split between our header and packet data */ |
109 | bool any_header_sg; | |
110 | ||
586d17c5 JW |
111 | /* enable config space updates */ |
112 | bool config_enable; | |
113 | ||
3fa2a1df | 114 | /* Active statistics */ |
115 | struct virtnet_stats __percpu *stats; | |
116 | ||
3161e453 RR |
117 | /* Work struct for refilling if we run low on memory. */ |
118 | struct delayed_work refill; | |
119 | ||
586d17c5 JW |
120 | /* Work struct for config space updates */ |
121 | struct work_struct config_work; | |
122 | ||
123 | /* Lock for config space updates */ | |
124 | struct mutex config_lock; | |
986a4f4d | 125 | |
2613af0e MD |
126 | /* Page_frag for GFP_KERNEL packet buffer allocation when we run |
127 | * low on memory. | |
128 | */ | |
129 | struct page_frag alloc_frag; | |
130 | ||
986a4f4d JW |
131 | /* Does the affinity hint is set for virtqueues? */ |
132 | bool affinity_hint_set; | |
47be2479 | 133 | |
8de4b2f3 WG |
134 | /* CPU hot plug notifier */ |
135 | struct notifier_block nb; | |
296f96fc RR |
136 | }; |
137 | ||
b3f24698 RR |
138 | struct skb_vnet_hdr { |
139 | union { | |
140 | struct virtio_net_hdr hdr; | |
141 | struct virtio_net_hdr_mrg_rxbuf mhdr; | |
142 | }; | |
143 | }; | |
144 | ||
9ab86bbc SM |
145 | struct padded_vnet_hdr { |
146 | struct virtio_net_hdr hdr; | |
147 | /* | |
148 | * virtio_net_hdr should be in a separated sg buffer because of a | |
149 | * QEMU bug, and data sg buffer shares same page with this header sg. | |
150 | * This padding makes next sg 16 byte aligned after virtio_net_hdr. | |
151 | */ | |
152 | char padding[6]; | |
153 | }; | |
154 | ||
986a4f4d JW |
155 | /* Converting between virtqueue no. and kernel tx/rx queue no. |
156 | * 0:rx0 1:tx0 2:rx1 3:tx1 ... 2N:rxN 2N+1:txN 2N+2:cvq | |
157 | */ | |
158 | static int vq2txq(struct virtqueue *vq) | |
159 | { | |
9d0ca6ed | 160 | return (vq->index - 1) / 2; |
986a4f4d JW |
161 | } |
162 | ||
163 | static int txq2vq(int txq) | |
164 | { | |
165 | return txq * 2 + 1; | |
166 | } | |
167 | ||
168 | static int vq2rxq(struct virtqueue *vq) | |
169 | { | |
9d0ca6ed | 170 | return vq->index / 2; |
986a4f4d JW |
171 | } |
172 | ||
173 | static int rxq2vq(int rxq) | |
174 | { | |
175 | return rxq * 2; | |
176 | } | |
177 | ||
b3f24698 | 178 | static inline struct skb_vnet_hdr *skb_vnet_hdr(struct sk_buff *skb) |
296f96fc | 179 | { |
b3f24698 | 180 | return (struct skb_vnet_hdr *)skb->cb; |
296f96fc RR |
181 | } |
182 | ||
9ab86bbc SM |
183 | /* |
184 | * private is used to chain pages for big packets, put the whole | |
185 | * most recent used list in the beginning for reuse | |
186 | */ | |
e9d7417b | 187 | static void give_pages(struct receive_queue *rq, struct page *page) |
0a888fd1 | 188 | { |
9ab86bbc | 189 | struct page *end; |
0a888fd1 | 190 | |
e9d7417b | 191 | /* Find end of list, sew whole thing into vi->rq.pages. */ |
9ab86bbc | 192 | for (end = page; end->private; end = (struct page *)end->private); |
e9d7417b JW |
193 | end->private = (unsigned long)rq->pages; |
194 | rq->pages = page; | |
0a888fd1 MM |
195 | } |
196 | ||
e9d7417b | 197 | static struct page *get_a_page(struct receive_queue *rq, gfp_t gfp_mask) |
fb6813f4 | 198 | { |
e9d7417b | 199 | struct page *p = rq->pages; |
fb6813f4 | 200 | |
9ab86bbc | 201 | if (p) { |
e9d7417b | 202 | rq->pages = (struct page *)p->private; |
9ab86bbc SM |
203 | /* clear private here, it is used to chain pages */ |
204 | p->private = 0; | |
205 | } else | |
fb6813f4 RR |
206 | p = alloc_page(gfp_mask); |
207 | return p; | |
208 | } | |
209 | ||
e9d7417b | 210 | static void skb_xmit_done(struct virtqueue *vq) |
296f96fc | 211 | { |
e9d7417b | 212 | struct virtnet_info *vi = vq->vdev->priv; |
296f96fc | 213 | |
2cb9c6ba | 214 | /* Suppress further interrupts. */ |
e9d7417b | 215 | virtqueue_disable_cb(vq); |
11a3a154 | 216 | |
363f1514 | 217 | /* We were probably waiting for more output buffers. */ |
986a4f4d | 218 | netif_wake_subqueue(vi->dev, vq2txq(vq)); |
296f96fc RR |
219 | } |
220 | ||
3464645a | 221 | /* Called from bottom half context */ |
e9d7417b | 222 | static struct sk_buff *page_to_skb(struct receive_queue *rq, |
2613af0e MD |
223 | struct page *page, unsigned int offset, |
224 | unsigned int len, unsigned int truesize) | |
9ab86bbc | 225 | { |
e9d7417b | 226 | struct virtnet_info *vi = rq->vq->vdev->priv; |
9ab86bbc SM |
227 | struct sk_buff *skb; |
228 | struct skb_vnet_hdr *hdr; | |
2613af0e | 229 | unsigned int copy, hdr_len, hdr_padded_len; |
9ab86bbc | 230 | char *p; |
fb6813f4 | 231 | |
2613af0e | 232 | p = page_address(page) + offset; |
3f2c31d9 | 233 | |
9ab86bbc SM |
234 | /* copy small packet so we can reuse these pages for small data */ |
235 | skb = netdev_alloc_skb_ip_align(vi->dev, GOOD_COPY_LEN); | |
236 | if (unlikely(!skb)) | |
237 | return NULL; | |
3f2c31d9 | 238 | |
9ab86bbc | 239 | hdr = skb_vnet_hdr(skb); |
3f2c31d9 | 240 | |
9ab86bbc SM |
241 | if (vi->mergeable_rx_bufs) { |
242 | hdr_len = sizeof hdr->mhdr; | |
2613af0e | 243 | hdr_padded_len = sizeof hdr->mhdr; |
9ab86bbc SM |
244 | } else { |
245 | hdr_len = sizeof hdr->hdr; | |
2613af0e | 246 | hdr_padded_len = sizeof(struct padded_vnet_hdr); |
9ab86bbc | 247 | } |
3f2c31d9 | 248 | |
9ab86bbc | 249 | memcpy(hdr, p, hdr_len); |
3f2c31d9 | 250 | |
9ab86bbc | 251 | len -= hdr_len; |
2613af0e MD |
252 | offset += hdr_padded_len; |
253 | p += hdr_padded_len; | |
3f2c31d9 | 254 | |
9ab86bbc SM |
255 | copy = len; |
256 | if (copy > skb_tailroom(skb)) | |
257 | copy = skb_tailroom(skb); | |
258 | memcpy(skb_put(skb, copy), p, copy); | |
3f2c31d9 | 259 | |
9ab86bbc SM |
260 | len -= copy; |
261 | offset += copy; | |
3f2c31d9 | 262 | |
2613af0e MD |
263 | if (vi->mergeable_rx_bufs) { |
264 | if (len) | |
265 | skb_add_rx_frag(skb, 0, page, offset, len, truesize); | |
266 | else | |
267 | put_page(page); | |
268 | return skb; | |
269 | } | |
270 | ||
e878d78b SL |
271 | /* |
272 | * Verify that we can indeed put this data into a skb. | |
273 | * This is here to handle cases when the device erroneously | |
274 | * tries to receive more than is possible. This is usually | |
275 | * the case of a broken device. | |
276 | */ | |
277 | if (unlikely(len > MAX_SKB_FRAGS * PAGE_SIZE)) { | |
be443899 | 278 | net_dbg_ratelimited("%s: too much data\n", skb->dev->name); |
e878d78b SL |
279 | dev_kfree_skb(skb); |
280 | return NULL; | |
281 | } | |
2613af0e | 282 | BUG_ON(offset >= PAGE_SIZE); |
9ab86bbc | 283 | while (len) { |
2613af0e MD |
284 | unsigned int frag_size = min((unsigned)PAGE_SIZE - offset, len); |
285 | skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, offset, | |
286 | frag_size, truesize); | |
287 | len -= frag_size; | |
9ab86bbc SM |
288 | page = (struct page *)page->private; |
289 | offset = 0; | |
290 | } | |
3f2c31d9 | 291 | |
9ab86bbc | 292 | if (page) |
e9d7417b | 293 | give_pages(rq, page); |
3f2c31d9 | 294 | |
9ab86bbc SM |
295 | return skb; |
296 | } | |
3f2c31d9 | 297 | |
f121159d MT |
298 | static struct sk_buff *receive_small(void *buf, unsigned int len) |
299 | { | |
300 | struct sk_buff * skb = buf; | |
301 | ||
302 | len -= sizeof(struct virtio_net_hdr); | |
303 | skb_trim(skb, len); | |
304 | ||
305 | return skb; | |
306 | } | |
307 | ||
308 | static struct sk_buff *receive_big(struct net_device *dev, | |
309 | struct receive_queue *rq, | |
310 | void *buf, | |
311 | unsigned int len) | |
312 | { | |
313 | struct page *page = buf; | |
314 | struct sk_buff *skb = page_to_skb(rq, page, 0, len, PAGE_SIZE); | |
315 | ||
316 | if (unlikely(!skb)) | |
317 | goto err; | |
318 | ||
319 | return skb; | |
320 | ||
321 | err: | |
322 | dev->stats.rx_dropped++; | |
323 | give_pages(rq, page); | |
324 | return NULL; | |
325 | } | |
326 | ||
8fc3b9e9 MT |
327 | static struct sk_buff *receive_mergeable(struct net_device *dev, |
328 | struct receive_queue *rq, | |
329 | void *buf, | |
330 | unsigned int len) | |
9ab86bbc | 331 | { |
8fc3b9e9 MT |
332 | struct skb_vnet_hdr *hdr = buf; |
333 | int num_buf = hdr->mhdr.num_buffers; | |
334 | struct page *page = virt_to_head_page(buf); | |
335 | int offset = buf - page_address(page); | |
336 | struct sk_buff *head_skb = page_to_skb(rq, page, offset, len, | |
337 | MERGE_BUFFER_LEN); | |
2613af0e | 338 | struct sk_buff *curr_skb = head_skb; |
9ab86bbc | 339 | |
8fc3b9e9 MT |
340 | if (unlikely(!curr_skb)) |
341 | goto err_skb; | |
342 | ||
9ab86bbc | 343 | while (--num_buf) { |
8fc3b9e9 MT |
344 | int num_skb_frags; |
345 | ||
2613af0e MD |
346 | buf = virtqueue_get_buf(rq->vq, &len); |
347 | if (unlikely(!buf)) { | |
8fc3b9e9 MT |
348 | pr_debug("%s: rx error: %d buffers out of %d missing\n", |
349 | dev->name, num_buf, hdr->mhdr.num_buffers); | |
350 | dev->stats.rx_length_errors++; | |
351 | goto err_buf; | |
3f2c31d9 | 352 | } |
5061de36 | 353 | if (unlikely(len > MERGE_BUFFER_LEN)) { |
2613af0e | 354 | pr_debug("%s: rx error: merge buffer too long\n", |
8fc3b9e9 | 355 | dev->name); |
5061de36 | 356 | len = MERGE_BUFFER_LEN; |
2613af0e | 357 | } |
8fc3b9e9 MT |
358 | |
359 | page = virt_to_head_page(buf); | |
8fc3b9e9 MT |
360 | |
361 | num_skb_frags = skb_shinfo(curr_skb)->nr_frags; | |
2613af0e MD |
362 | if (unlikely(num_skb_frags == MAX_SKB_FRAGS)) { |
363 | struct sk_buff *nskb = alloc_skb(0, GFP_ATOMIC); | |
8fc3b9e9 MT |
364 | |
365 | if (unlikely(!nskb)) | |
366 | goto err_skb; | |
2613af0e MD |
367 | if (curr_skb == head_skb) |
368 | skb_shinfo(curr_skb)->frag_list = nskb; | |
369 | else | |
370 | curr_skb->next = nskb; | |
371 | curr_skb = nskb; | |
372 | head_skb->truesize += nskb->truesize; | |
373 | num_skb_frags = 0; | |
374 | } | |
375 | if (curr_skb != head_skb) { | |
376 | head_skb->data_len += len; | |
377 | head_skb->len += len; | |
5061de36 | 378 | head_skb->truesize += MERGE_BUFFER_LEN; |
2613af0e | 379 | } |
8fc3b9e9 | 380 | offset = buf - page_address(page); |
ba275241 JW |
381 | if (skb_can_coalesce(curr_skb, num_skb_frags, page, offset)) { |
382 | put_page(page); | |
383 | skb_coalesce_rx_frag(curr_skb, num_skb_frags - 1, | |
5061de36 | 384 | len, MERGE_BUFFER_LEN); |
ba275241 JW |
385 | } else { |
386 | skb_add_rx_frag(curr_skb, num_skb_frags, page, | |
5061de36 | 387 | offset, len, MERGE_BUFFER_LEN); |
ba275241 | 388 | } |
8fc3b9e9 MT |
389 | } |
390 | ||
391 | return head_skb; | |
392 | ||
393 | err_skb: | |
394 | put_page(page); | |
395 | while (--num_buf) { | |
396 | buf = virtqueue_get_buf(rq->vq, &len); | |
397 | if (unlikely(!buf)) { | |
398 | pr_debug("%s: rx error: %d buffers missing\n", | |
399 | dev->name, num_buf); | |
400 | dev->stats.rx_length_errors++; | |
401 | break; | |
402 | } | |
403 | page = virt_to_head_page(buf); | |
404 | put_page(page); | |
9ab86bbc | 405 | } |
8fc3b9e9 MT |
406 | err_buf: |
407 | dev->stats.rx_dropped++; | |
408 | dev_kfree_skb(head_skb); | |
409 | return NULL; | |
9ab86bbc SM |
410 | } |
411 | ||
e9d7417b | 412 | static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len) |
9ab86bbc | 413 | { |
e9d7417b JW |
414 | struct virtnet_info *vi = rq->vq->vdev->priv; |
415 | struct net_device *dev = vi->dev; | |
58472a76 | 416 | struct virtnet_stats *stats = this_cpu_ptr(vi->stats); |
9ab86bbc | 417 | struct sk_buff *skb; |
9ab86bbc | 418 | struct skb_vnet_hdr *hdr; |
3f2c31d9 | 419 | |
9ab86bbc SM |
420 | if (unlikely(len < sizeof(struct virtio_net_hdr) + ETH_HLEN)) { |
421 | pr_debug("%s: short packet %i\n", dev->name, len); | |
422 | dev->stats.rx_length_errors++; | |
98bfd23c | 423 | if (vi->mergeable_rx_bufs) |
2613af0e | 424 | put_page(virt_to_head_page(buf)); |
98bfd23c MD |
425 | else if (vi->big_packets) |
426 | give_pages(rq, buf); | |
9ab86bbc SM |
427 | else |
428 | dev_kfree_skb(buf); | |
429 | return; | |
430 | } | |
3f2c31d9 | 431 | |
f121159d | 432 | if (vi->mergeable_rx_bufs) |
8fc3b9e9 | 433 | skb = receive_mergeable(dev, rq, buf, len); |
f121159d MT |
434 | else if (vi->big_packets) |
435 | skb = receive_big(dev, rq, buf, len); | |
436 | else | |
437 | skb = receive_small(buf, len); | |
438 | ||
439 | if (unlikely(!skb)) | |
440 | return; | |
3f2c31d9 | 441 | |
9ab86bbc | 442 | hdr = skb_vnet_hdr(skb); |
3fa2a1df | 443 | |
83a27052 | 444 | u64_stats_update_begin(&stats->rx_syncp); |
3fa2a1df | 445 | stats->rx_bytes += skb->len; |
446 | stats->rx_packets++; | |
83a27052 | 447 | u64_stats_update_end(&stats->rx_syncp); |
296f96fc | 448 | |
b3f24698 | 449 | if (hdr->hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { |
296f96fc | 450 | pr_debug("Needs csum!\n"); |
b3f24698 RR |
451 | if (!skb_partial_csum_set(skb, |
452 | hdr->hdr.csum_start, | |
453 | hdr->hdr.csum_offset)) | |
296f96fc | 454 | goto frame_err; |
10a8d94a JW |
455 | } else if (hdr->hdr.flags & VIRTIO_NET_HDR_F_DATA_VALID) { |
456 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
296f96fc RR |
457 | } |
458 | ||
23cde76d MM |
459 | skb->protocol = eth_type_trans(skb, dev); |
460 | pr_debug("Receiving skb proto 0x%04x len %i type %i\n", | |
461 | ntohs(skb->protocol), skb->len, skb->pkt_type); | |
462 | ||
b3f24698 | 463 | if (hdr->hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) { |
296f96fc | 464 | pr_debug("GSO!\n"); |
b3f24698 | 465 | switch (hdr->hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { |
296f96fc | 466 | case VIRTIO_NET_HDR_GSO_TCPV4: |
c9af6db4 | 467 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; |
296f96fc | 468 | break; |
296f96fc | 469 | case VIRTIO_NET_HDR_GSO_UDP: |
c9af6db4 | 470 | skb_shinfo(skb)->gso_type = SKB_GSO_UDP; |
296f96fc RR |
471 | break; |
472 | case VIRTIO_NET_HDR_GSO_TCPV6: | |
c9af6db4 | 473 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; |
296f96fc RR |
474 | break; |
475 | default: | |
be443899 AW |
476 | net_warn_ratelimited("%s: bad gso type %u.\n", |
477 | dev->name, hdr->hdr.gso_type); | |
296f96fc RR |
478 | goto frame_err; |
479 | } | |
480 | ||
b3f24698 | 481 | if (hdr->hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN) |
c9af6db4 | 482 | skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN; |
34a48579 | 483 | |
b3f24698 | 484 | skb_shinfo(skb)->gso_size = hdr->hdr.gso_size; |
296f96fc | 485 | if (skb_shinfo(skb)->gso_size == 0) { |
be443899 | 486 | net_warn_ratelimited("%s: zero gso size.\n", dev->name); |
296f96fc RR |
487 | goto frame_err; |
488 | } | |
489 | ||
490 | /* Header must be checked, and gso_segs computed. */ | |
491 | skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY; | |
492 | skb_shinfo(skb)->gso_segs = 0; | |
493 | } | |
494 | ||
495 | netif_receive_skb(skb); | |
496 | return; | |
497 | ||
498 | frame_err: | |
499 | dev->stats.rx_frame_errors++; | |
296f96fc RR |
500 | dev_kfree_skb(skb); |
501 | } | |
502 | ||
e9d7417b | 503 | static int add_recvbuf_small(struct receive_queue *rq, gfp_t gfp) |
296f96fc | 504 | { |
e9d7417b | 505 | struct virtnet_info *vi = rq->vq->vdev->priv; |
296f96fc | 506 | struct sk_buff *skb; |
9ab86bbc | 507 | struct skb_vnet_hdr *hdr; |
9ab86bbc | 508 | int err; |
3f2c31d9 | 509 | |
5061de36 | 510 | skb = __netdev_alloc_skb_ip_align(vi->dev, GOOD_PACKET_LEN, gfp); |
9ab86bbc SM |
511 | if (unlikely(!skb)) |
512 | return -ENOMEM; | |
296f96fc | 513 | |
5061de36 | 514 | skb_put(skb, GOOD_PACKET_LEN); |
3f2c31d9 | 515 | |
9ab86bbc | 516 | hdr = skb_vnet_hdr(skb); |
e9d7417b | 517 | sg_set_buf(rq->sg, &hdr->hdr, sizeof hdr->hdr); |
97402b96 | 518 | |
e9d7417b | 519 | skb_to_sgvec(skb, rq->sg + 1, 0, skb->len); |
97402b96 | 520 | |
9dc7b9e4 | 521 | err = virtqueue_add_inbuf(rq->vq, rq->sg, 2, skb, gfp); |
9ab86bbc SM |
522 | if (err < 0) |
523 | dev_kfree_skb(skb); | |
97402b96 | 524 | |
9ab86bbc SM |
525 | return err; |
526 | } | |
97402b96 | 527 | |
e9d7417b | 528 | static int add_recvbuf_big(struct receive_queue *rq, gfp_t gfp) |
9ab86bbc | 529 | { |
9ab86bbc SM |
530 | struct page *first, *list = NULL; |
531 | char *p; | |
532 | int i, err, offset; | |
533 | ||
e9d7417b | 534 | /* page in rq->sg[MAX_SKB_FRAGS + 1] is list tail */ |
9ab86bbc | 535 | for (i = MAX_SKB_FRAGS + 1; i > 1; --i) { |
e9d7417b | 536 | first = get_a_page(rq, gfp); |
9ab86bbc SM |
537 | if (!first) { |
538 | if (list) | |
e9d7417b | 539 | give_pages(rq, list); |
9ab86bbc | 540 | return -ENOMEM; |
97402b96 | 541 | } |
e9d7417b | 542 | sg_set_buf(&rq->sg[i], page_address(first), PAGE_SIZE); |
97402b96 | 543 | |
9ab86bbc SM |
544 | /* chain new page in list head to match sg */ |
545 | first->private = (unsigned long)list; | |
546 | list = first; | |
547 | } | |
296f96fc | 548 | |
e9d7417b | 549 | first = get_a_page(rq, gfp); |
9ab86bbc | 550 | if (!first) { |
e9d7417b | 551 | give_pages(rq, list); |
9ab86bbc SM |
552 | return -ENOMEM; |
553 | } | |
554 | p = page_address(first); | |
555 | ||
e9d7417b JW |
556 | /* rq->sg[0], rq->sg[1] share the same page */ |
557 | /* a separated rq->sg[0] for virtio_net_hdr only due to QEMU bug */ | |
558 | sg_set_buf(&rq->sg[0], p, sizeof(struct virtio_net_hdr)); | |
9ab86bbc | 559 | |
e9d7417b | 560 | /* rq->sg[1] for data packet, from offset */ |
9ab86bbc | 561 | offset = sizeof(struct padded_vnet_hdr); |
e9d7417b | 562 | sg_set_buf(&rq->sg[1], p + offset, PAGE_SIZE - offset); |
9ab86bbc SM |
563 | |
564 | /* chain first in list head */ | |
565 | first->private = (unsigned long)list; | |
9dc7b9e4 RR |
566 | err = virtqueue_add_inbuf(rq->vq, rq->sg, MAX_SKB_FRAGS + 2, |
567 | first, gfp); | |
9ab86bbc | 568 | if (err < 0) |
e9d7417b | 569 | give_pages(rq, first); |
9ab86bbc SM |
570 | |
571 | return err; | |
296f96fc RR |
572 | } |
573 | ||
e9d7417b | 574 | static int add_recvbuf_mergeable(struct receive_queue *rq, gfp_t gfp) |
3f2c31d9 | 575 | { |
2613af0e MD |
576 | struct virtnet_info *vi = rq->vq->vdev->priv; |
577 | char *buf = NULL; | |
3f2c31d9 | 578 | int err; |
3f2c31d9 | 579 | |
2613af0e | 580 | if (gfp & __GFP_WAIT) { |
5061de36 | 581 | if (skb_page_frag_refill(MERGE_BUFFER_LEN, &vi->alloc_frag, |
2613af0e MD |
582 | gfp)) { |
583 | buf = (char *)page_address(vi->alloc_frag.page) + | |
584 | vi->alloc_frag.offset; | |
585 | get_page(vi->alloc_frag.page); | |
5061de36 | 586 | vi->alloc_frag.offset += MERGE_BUFFER_LEN; |
2613af0e MD |
587 | } |
588 | } else { | |
5061de36 | 589 | buf = netdev_alloc_frag(MERGE_BUFFER_LEN); |
2613af0e MD |
590 | } |
591 | if (!buf) | |
9ab86bbc | 592 | return -ENOMEM; |
3f2c31d9 | 593 | |
5061de36 | 594 | sg_init_one(rq->sg, buf, MERGE_BUFFER_LEN); |
2613af0e | 595 | err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, buf, gfp); |
9ab86bbc | 596 | if (err < 0) |
2613af0e | 597 | put_page(virt_to_head_page(buf)); |
3f2c31d9 | 598 | |
9ab86bbc SM |
599 | return err; |
600 | } | |
3f2c31d9 | 601 | |
b2baed69 RR |
602 | /* |
603 | * Returns false if we couldn't fill entirely (OOM). | |
604 | * | |
605 | * Normally run in the receive path, but can also be run from ndo_open | |
606 | * before we're receiving packets, or from refill_work which is | |
607 | * careful to disable receiving (using napi_disable). | |
608 | */ | |
e9d7417b | 609 | static bool try_fill_recv(struct receive_queue *rq, gfp_t gfp) |
9ab86bbc | 610 | { |
e9d7417b | 611 | struct virtnet_info *vi = rq->vq->vdev->priv; |
9ab86bbc | 612 | int err; |
1788f495 | 613 | bool oom; |
3f2c31d9 | 614 | |
9ab86bbc SM |
615 | do { |
616 | if (vi->mergeable_rx_bufs) | |
e9d7417b | 617 | err = add_recvbuf_mergeable(rq, gfp); |
9ab86bbc | 618 | else if (vi->big_packets) |
e9d7417b | 619 | err = add_recvbuf_big(rq, gfp); |
9ab86bbc | 620 | else |
e9d7417b | 621 | err = add_recvbuf_small(rq, gfp); |
3f2c31d9 | 622 | |
1788f495 | 623 | oom = err == -ENOMEM; |
9ed4cb07 | 624 | if (err) |
3f2c31d9 | 625 | break; |
b7dfde95 | 626 | } while (rq->vq->num_free); |
67975901 HG |
627 | if (unlikely(!virtqueue_kick(rq->vq))) |
628 | return false; | |
3161e453 | 629 | return !oom; |
3f2c31d9 MM |
630 | } |
631 | ||
18445c4d | 632 | static void skb_recv_done(struct virtqueue *rvq) |
296f96fc RR |
633 | { |
634 | struct virtnet_info *vi = rvq->vdev->priv; | |
986a4f4d | 635 | struct receive_queue *rq = &vi->rq[vq2rxq(rvq)]; |
e9d7417b | 636 | |
18445c4d | 637 | /* Schedule NAPI, Suppress further interrupts if successful. */ |
e9d7417b | 638 | if (napi_schedule_prep(&rq->napi)) { |
1915a712 | 639 | virtqueue_disable_cb(rvq); |
e9d7417b | 640 | __napi_schedule(&rq->napi); |
18445c4d | 641 | } |
296f96fc RR |
642 | } |
643 | ||
e9d7417b | 644 | static void virtnet_napi_enable(struct receive_queue *rq) |
3e9d08ec | 645 | { |
e9d7417b | 646 | napi_enable(&rq->napi); |
3e9d08ec BR |
647 | |
648 | /* If all buffers were filled by other side before we napi_enabled, we | |
649 | * won't get another interrupt, so process any outstanding packets | |
650 | * now. virtnet_poll wants re-enable the queue, so we disable here. | |
651 | * We synchronize against interrupts via NAPI_STATE_SCHED */ | |
e9d7417b JW |
652 | if (napi_schedule_prep(&rq->napi)) { |
653 | virtqueue_disable_cb(rq->vq); | |
ec13ee80 | 654 | local_bh_disable(); |
e9d7417b | 655 | __napi_schedule(&rq->napi); |
ec13ee80 | 656 | local_bh_enable(); |
3e9d08ec BR |
657 | } |
658 | } | |
659 | ||
3161e453 RR |
660 | static void refill_work(struct work_struct *work) |
661 | { | |
e9d7417b JW |
662 | struct virtnet_info *vi = |
663 | container_of(work, struct virtnet_info, refill.work); | |
3161e453 | 664 | bool still_empty; |
986a4f4d JW |
665 | int i; |
666 | ||
55257d72 | 667 | for (i = 0; i < vi->curr_queue_pairs; i++) { |
986a4f4d | 668 | struct receive_queue *rq = &vi->rq[i]; |
3161e453 | 669 | |
986a4f4d JW |
670 | napi_disable(&rq->napi); |
671 | still_empty = !try_fill_recv(rq, GFP_KERNEL); | |
672 | virtnet_napi_enable(rq); | |
3161e453 | 673 | |
986a4f4d JW |
674 | /* In theory, this can happen: if we don't get any buffers in |
675 | * we will *never* try to fill again. | |
676 | */ | |
677 | if (still_empty) | |
678 | schedule_delayed_work(&vi->refill, HZ/2); | |
679 | } | |
3161e453 RR |
680 | } |
681 | ||
296f96fc RR |
682 | static int virtnet_poll(struct napi_struct *napi, int budget) |
683 | { | |
e9d7417b JW |
684 | struct receive_queue *rq = |
685 | container_of(napi, struct receive_queue, napi); | |
686 | struct virtnet_info *vi = rq->vq->vdev->priv; | |
9ab86bbc | 687 | void *buf; |
cbdadbbf | 688 | unsigned int r, len, received = 0; |
296f96fc RR |
689 | |
690 | again: | |
691 | while (received < budget && | |
e9d7417b JW |
692 | (buf = virtqueue_get_buf(rq->vq, &len)) != NULL) { |
693 | receive_buf(rq, buf, len); | |
296f96fc RR |
694 | received++; |
695 | } | |
696 | ||
be121f46 | 697 | if (rq->vq->num_free > virtqueue_get_vring_size(rq->vq) / 2) { |
e9d7417b | 698 | if (!try_fill_recv(rq, GFP_ATOMIC)) |
3b07e9ca | 699 | schedule_delayed_work(&vi->refill, 0); |
3161e453 | 700 | } |
296f96fc | 701 | |
8329d98e RR |
702 | /* Out of packets? */ |
703 | if (received < budget) { | |
cbdadbbf | 704 | r = virtqueue_enable_cb_prepare(rq->vq); |
288379f0 | 705 | napi_complete(napi); |
cbdadbbf | 706 | if (unlikely(virtqueue_poll(rq->vq, r)) && |
8e95a202 | 707 | napi_schedule_prep(napi)) { |
e9d7417b | 708 | virtqueue_disable_cb(rq->vq); |
288379f0 | 709 | __napi_schedule(napi); |
296f96fc | 710 | goto again; |
4265f161 | 711 | } |
296f96fc RR |
712 | } |
713 | ||
714 | return received; | |
715 | } | |
716 | ||
986a4f4d JW |
717 | static int virtnet_open(struct net_device *dev) |
718 | { | |
719 | struct virtnet_info *vi = netdev_priv(dev); | |
720 | int i; | |
721 | ||
e4166625 JW |
722 | for (i = 0; i < vi->max_queue_pairs; i++) { |
723 | if (i < vi->curr_queue_pairs) | |
724 | /* Make sure we have some buffers: if oom use wq. */ | |
725 | if (!try_fill_recv(&vi->rq[i], GFP_KERNEL)) | |
726 | schedule_delayed_work(&vi->refill, 0); | |
986a4f4d JW |
727 | virtnet_napi_enable(&vi->rq[i]); |
728 | } | |
729 | ||
730 | return 0; | |
731 | } | |
732 | ||
b7dfde95 | 733 | static void free_old_xmit_skbs(struct send_queue *sq) |
296f96fc RR |
734 | { |
735 | struct sk_buff *skb; | |
6ee57bcc | 736 | unsigned int len; |
e9d7417b | 737 | struct virtnet_info *vi = sq->vq->vdev->priv; |
58472a76 | 738 | struct virtnet_stats *stats = this_cpu_ptr(vi->stats); |
296f96fc | 739 | |
e9d7417b | 740 | while ((skb = virtqueue_get_buf(sq->vq, &len)) != NULL) { |
296f96fc | 741 | pr_debug("Sent skb %p\n", skb); |
3fa2a1df | 742 | |
83a27052 | 743 | u64_stats_update_begin(&stats->tx_syncp); |
3fa2a1df | 744 | stats->tx_bytes += skb->len; |
745 | stats->tx_packets++; | |
83a27052 | 746 | u64_stats_update_end(&stats->tx_syncp); |
3fa2a1df | 747 | |
ed79bab8 | 748 | dev_kfree_skb_any(skb); |
296f96fc RR |
749 | } |
750 | } | |
751 | ||
e9d7417b | 752 | static int xmit_skb(struct send_queue *sq, struct sk_buff *skb) |
296f96fc | 753 | { |
e7428e95 | 754 | struct skb_vnet_hdr *hdr; |
296f96fc | 755 | const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest; |
e9d7417b | 756 | struct virtnet_info *vi = sq->vq->vdev->priv; |
7bedc7dc | 757 | unsigned num_sg; |
e7428e95 MT |
758 | unsigned hdr_len; |
759 | bool can_push; | |
296f96fc | 760 | |
e174961c | 761 | pr_debug("%s: xmit %p %pM\n", vi->dev->name, skb, dest); |
e7428e95 MT |
762 | if (vi->mergeable_rx_bufs) |
763 | hdr_len = sizeof hdr->mhdr; | |
764 | else | |
765 | hdr_len = sizeof hdr->hdr; | |
766 | ||
767 | can_push = vi->any_header_sg && | |
768 | !((unsigned long)skb->data & (__alignof__(*hdr) - 1)) && | |
769 | !skb_header_cloned(skb) && skb_headroom(skb) >= hdr_len; | |
770 | /* Even if we can, don't push here yet as this would skew | |
771 | * csum_start offset below. */ | |
772 | if (can_push) | |
773 | hdr = (struct skb_vnet_hdr *)(skb->data - hdr_len); | |
774 | else | |
775 | hdr = skb_vnet_hdr(skb); | |
296f96fc | 776 | |
296f96fc | 777 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
b3f24698 | 778 | hdr->hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; |
55508d60 | 779 | hdr->hdr.csum_start = skb_checksum_start_offset(skb); |
b3f24698 | 780 | hdr->hdr.csum_offset = skb->csum_offset; |
296f96fc | 781 | } else { |
b3f24698 RR |
782 | hdr->hdr.flags = 0; |
783 | hdr->hdr.csum_offset = hdr->hdr.csum_start = 0; | |
296f96fc RR |
784 | } |
785 | ||
786 | if (skb_is_gso(skb)) { | |
b3f24698 RR |
787 | hdr->hdr.hdr_len = skb_headlen(skb); |
788 | hdr->hdr.gso_size = skb_shinfo(skb)->gso_size; | |
34a48579 | 789 | if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) |
b3f24698 | 790 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4; |
296f96fc | 791 | else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) |
b3f24698 | 792 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6; |
296f96fc | 793 | else if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
b3f24698 | 794 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP; |
296f96fc RR |
795 | else |
796 | BUG(); | |
34a48579 | 797 | if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN) |
b3f24698 | 798 | hdr->hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN; |
296f96fc | 799 | } else { |
b3f24698 RR |
800 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE; |
801 | hdr->hdr.gso_size = hdr->hdr.hdr_len = 0; | |
296f96fc RR |
802 | } |
803 | ||
3f2c31d9 | 804 | if (vi->mergeable_rx_bufs) |
e7428e95 | 805 | hdr->mhdr.num_buffers = 0; |
3f2c31d9 | 806 | |
e7428e95 MT |
807 | if (can_push) { |
808 | __skb_push(skb, hdr_len); | |
809 | num_sg = skb_to_sgvec(skb, sq->sg, 0, skb->len); | |
810 | /* Pull header back to avoid skew in tx bytes calculations. */ | |
811 | __skb_pull(skb, hdr_len); | |
812 | } else { | |
813 | sg_set_buf(sq->sg, hdr, hdr_len); | |
814 | num_sg = skb_to_sgvec(skb, sq->sg + 1, 0, skb->len) + 1; | |
815 | } | |
9dc7b9e4 | 816 | return virtqueue_add_outbuf(sq->vq, sq->sg, num_sg, skb, GFP_ATOMIC); |
11a3a154 RR |
817 | } |
818 | ||
424efe9c | 819 | static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev) |
99ffc696 RR |
820 | { |
821 | struct virtnet_info *vi = netdev_priv(dev); | |
986a4f4d JW |
822 | int qnum = skb_get_queue_mapping(skb); |
823 | struct send_queue *sq = &vi->sq[qnum]; | |
9ed4cb07 | 824 | int err; |
2cb9c6ba | 825 | |
2cb9c6ba | 826 | /* Free up any pending old buffers before queueing new ones. */ |
e9d7417b | 827 | free_old_xmit_skbs(sq); |
99ffc696 | 828 | |
03f191ba | 829 | /* Try to transmit */ |
b7dfde95 | 830 | err = xmit_skb(sq, skb); |
48925e37 | 831 | |
9ed4cb07 | 832 | /* This should not happen! */ |
67975901 | 833 | if (unlikely(err) || unlikely(!virtqueue_kick(sq->vq))) { |
9ed4cb07 RR |
834 | dev->stats.tx_fifo_errors++; |
835 | if (net_ratelimit()) | |
836 | dev_warn(&dev->dev, | |
b7dfde95 | 837 | "Unexpected TXQ (%d) queue failure: %d\n", qnum, err); |
58eba97d RR |
838 | dev->stats.tx_dropped++; |
839 | kfree_skb(skb); | |
840 | return NETDEV_TX_OK; | |
296f96fc | 841 | } |
03f191ba | 842 | |
48925e37 RR |
843 | /* Don't wait up for transmitted skbs to be freed. */ |
844 | skb_orphan(skb); | |
845 | nf_reset(skb); | |
846 | ||
847 | /* Apparently nice girls don't return TX_BUSY; stop the queue | |
848 | * before it gets out of hand. Naturally, this wastes entries. */ | |
b7dfde95 | 849 | if (sq->vq->num_free < 2+MAX_SKB_FRAGS) { |
986a4f4d | 850 | netif_stop_subqueue(dev, qnum); |
e9d7417b | 851 | if (unlikely(!virtqueue_enable_cb_delayed(sq->vq))) { |
48925e37 | 852 | /* More just got used, free them then recheck. */ |
b7dfde95 LT |
853 | free_old_xmit_skbs(sq); |
854 | if (sq->vq->num_free >= 2+MAX_SKB_FRAGS) { | |
986a4f4d | 855 | netif_start_subqueue(dev, qnum); |
e9d7417b | 856 | virtqueue_disable_cb(sq->vq); |
48925e37 RR |
857 | } |
858 | } | |
99ffc696 | 859 | } |
48925e37 RR |
860 | |
861 | return NETDEV_TX_OK; | |
296f96fc RR |
862 | } |
863 | ||
40cbfc37 AK |
864 | /* |
865 | * Send command via the control virtqueue and check status. Commands | |
866 | * supported by the hypervisor, as indicated by feature bits, should | |
788a8b6d | 867 | * never fail unless improperly formatted. |
40cbfc37 AK |
868 | */ |
869 | static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd, | |
d24bae32 | 870 | struct scatterlist *out) |
40cbfc37 | 871 | { |
f7bc9594 | 872 | struct scatterlist *sgs[4], hdr, stat; |
40cbfc37 AK |
873 | struct virtio_net_ctrl_hdr ctrl; |
874 | virtio_net_ctrl_ack status = ~0; | |
d24bae32 | 875 | unsigned out_num = 0, tmp; |
40cbfc37 AK |
876 | |
877 | /* Caller should know better */ | |
f7bc9594 | 878 | BUG_ON(!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ)); |
40cbfc37 AK |
879 | |
880 | ctrl.class = class; | |
881 | ctrl.cmd = cmd; | |
f7bc9594 RR |
882 | /* Add header */ |
883 | sg_init_one(&hdr, &ctrl, sizeof(ctrl)); | |
884 | sgs[out_num++] = &hdr; | |
40cbfc37 | 885 | |
f7bc9594 RR |
886 | if (out) |
887 | sgs[out_num++] = out; | |
40cbfc37 | 888 | |
f7bc9594 RR |
889 | /* Add return status. */ |
890 | sg_init_one(&stat, &status, sizeof(status)); | |
d24bae32 | 891 | sgs[out_num] = &stat; |
40cbfc37 | 892 | |
d24bae32 | 893 | BUG_ON(out_num + 1 > ARRAY_SIZE(sgs)); |
894 | BUG_ON(virtqueue_add_sgs(vi->cvq, sgs, out_num, 1, vi, GFP_ATOMIC) < 0); | |
40cbfc37 | 895 | |
67975901 HG |
896 | if (unlikely(!virtqueue_kick(vi->cvq))) |
897 | return status == VIRTIO_NET_OK; | |
40cbfc37 AK |
898 | |
899 | /* Spin for a response, the kick causes an ioport write, trapping | |
900 | * into the hypervisor, so the request should be handled immediately. | |
901 | */ | |
047b9b94 HG |
902 | while (!virtqueue_get_buf(vi->cvq, &tmp) && |
903 | !virtqueue_is_broken(vi->cvq)) | |
40cbfc37 AK |
904 | cpu_relax(); |
905 | ||
906 | return status == VIRTIO_NET_OK; | |
907 | } | |
908 | ||
9c46f6d4 AW |
909 | static int virtnet_set_mac_address(struct net_device *dev, void *p) |
910 | { | |
911 | struct virtnet_info *vi = netdev_priv(dev); | |
912 | struct virtio_device *vdev = vi->vdev; | |
f2f2c8b4 | 913 | int ret; |
7e58d5ae AK |
914 | struct sockaddr *addr = p; |
915 | struct scatterlist sg; | |
9c46f6d4 | 916 | |
7e58d5ae | 917 | ret = eth_prepare_mac_addr_change(dev, p); |
f2f2c8b4 JP |
918 | if (ret) |
919 | return ret; | |
9c46f6d4 | 920 | |
7e58d5ae AK |
921 | if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR)) { |
922 | sg_init_one(&sg, addr->sa_data, dev->addr_len); | |
923 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC, | |
d24bae32 | 924 | VIRTIO_NET_CTRL_MAC_ADDR_SET, &sg)) { |
7e58d5ae AK |
925 | dev_warn(&vdev->dev, |
926 | "Failed to set mac address by vq command.\n"); | |
927 | return -EINVAL; | |
928 | } | |
929 | } else if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) { | |
855e0c52 RR |
930 | unsigned int i; |
931 | ||
932 | /* Naturally, this has an atomicity problem. */ | |
933 | for (i = 0; i < dev->addr_len; i++) | |
934 | virtio_cwrite8(vdev, | |
935 | offsetof(struct virtio_net_config, mac) + | |
936 | i, addr->sa_data[i]); | |
7e58d5ae AK |
937 | } |
938 | ||
939 | eth_commit_mac_addr_change(dev, p); | |
9c46f6d4 AW |
940 | |
941 | return 0; | |
942 | } | |
943 | ||
3fa2a1df | 944 | static struct rtnl_link_stats64 *virtnet_stats(struct net_device *dev, |
945 | struct rtnl_link_stats64 *tot) | |
946 | { | |
947 | struct virtnet_info *vi = netdev_priv(dev); | |
948 | int cpu; | |
949 | unsigned int start; | |
950 | ||
951 | for_each_possible_cpu(cpu) { | |
58472a76 | 952 | struct virtnet_stats *stats = per_cpu_ptr(vi->stats, cpu); |
3fa2a1df | 953 | u64 tpackets, tbytes, rpackets, rbytes; |
954 | ||
955 | do { | |
e3906486 | 956 | start = u64_stats_fetch_begin_bh(&stats->tx_syncp); |
3fa2a1df | 957 | tpackets = stats->tx_packets; |
958 | tbytes = stats->tx_bytes; | |
e3906486 | 959 | } while (u64_stats_fetch_retry_bh(&stats->tx_syncp, start)); |
83a27052 ED |
960 | |
961 | do { | |
e3906486 | 962 | start = u64_stats_fetch_begin_bh(&stats->rx_syncp); |
3fa2a1df | 963 | rpackets = stats->rx_packets; |
964 | rbytes = stats->rx_bytes; | |
e3906486 | 965 | } while (u64_stats_fetch_retry_bh(&stats->rx_syncp, start)); |
3fa2a1df | 966 | |
967 | tot->rx_packets += rpackets; | |
968 | tot->tx_packets += tpackets; | |
969 | tot->rx_bytes += rbytes; | |
970 | tot->tx_bytes += tbytes; | |
971 | } | |
972 | ||
973 | tot->tx_dropped = dev->stats.tx_dropped; | |
021ac8d3 | 974 | tot->tx_fifo_errors = dev->stats.tx_fifo_errors; |
3fa2a1df | 975 | tot->rx_dropped = dev->stats.rx_dropped; |
976 | tot->rx_length_errors = dev->stats.rx_length_errors; | |
977 | tot->rx_frame_errors = dev->stats.rx_frame_errors; | |
978 | ||
979 | return tot; | |
980 | } | |
981 | ||
da74e89d AS |
982 | #ifdef CONFIG_NET_POLL_CONTROLLER |
983 | static void virtnet_netpoll(struct net_device *dev) | |
984 | { | |
985 | struct virtnet_info *vi = netdev_priv(dev); | |
986a4f4d | 986 | int i; |
da74e89d | 987 | |
986a4f4d JW |
988 | for (i = 0; i < vi->curr_queue_pairs; i++) |
989 | napi_schedule(&vi->rq[i].napi); | |
da74e89d AS |
990 | } |
991 | #endif | |
992 | ||
586d17c5 JW |
993 | static void virtnet_ack_link_announce(struct virtnet_info *vi) |
994 | { | |
995 | rtnl_lock(); | |
996 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_ANNOUNCE, | |
d24bae32 | 997 | VIRTIO_NET_CTRL_ANNOUNCE_ACK, NULL)) |
586d17c5 JW |
998 | dev_warn(&vi->dev->dev, "Failed to ack link announce.\n"); |
999 | rtnl_unlock(); | |
1000 | } | |
1001 | ||
986a4f4d JW |
1002 | static int virtnet_set_queues(struct virtnet_info *vi, u16 queue_pairs) |
1003 | { | |
1004 | struct scatterlist sg; | |
1005 | struct virtio_net_ctrl_mq s; | |
1006 | struct net_device *dev = vi->dev; | |
1007 | ||
1008 | if (!vi->has_cvq || !virtio_has_feature(vi->vdev, VIRTIO_NET_F_MQ)) | |
1009 | return 0; | |
1010 | ||
1011 | s.virtqueue_pairs = queue_pairs; | |
1012 | sg_init_one(&sg, &s, sizeof(s)); | |
1013 | ||
1014 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MQ, | |
d24bae32 | 1015 | VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &sg)) { |
986a4f4d JW |
1016 | dev_warn(&dev->dev, "Fail to set num of queue pairs to %d\n", |
1017 | queue_pairs); | |
1018 | return -EINVAL; | |
55257d72 | 1019 | } else { |
986a4f4d | 1020 | vi->curr_queue_pairs = queue_pairs; |
35ed159b JW |
1021 | /* virtnet_open() will refill when device is going to up. */ |
1022 | if (dev->flags & IFF_UP) | |
1023 | schedule_delayed_work(&vi->refill, 0); | |
55257d72 | 1024 | } |
986a4f4d JW |
1025 | |
1026 | return 0; | |
1027 | } | |
1028 | ||
296f96fc RR |
1029 | static int virtnet_close(struct net_device *dev) |
1030 | { | |
1031 | struct virtnet_info *vi = netdev_priv(dev); | |
986a4f4d | 1032 | int i; |
296f96fc | 1033 | |
b2baed69 RR |
1034 | /* Make sure refill_work doesn't re-enable napi! */ |
1035 | cancel_delayed_work_sync(&vi->refill); | |
986a4f4d JW |
1036 | |
1037 | for (i = 0; i < vi->max_queue_pairs; i++) | |
1038 | napi_disable(&vi->rq[i].napi); | |
296f96fc | 1039 | |
296f96fc RR |
1040 | return 0; |
1041 | } | |
1042 | ||
2af7698e AW |
1043 | static void virtnet_set_rx_mode(struct net_device *dev) |
1044 | { | |
1045 | struct virtnet_info *vi = netdev_priv(dev); | |
f565a7c2 | 1046 | struct scatterlist sg[2]; |
2af7698e | 1047 | u8 promisc, allmulti; |
f565a7c2 | 1048 | struct virtio_net_ctrl_mac *mac_data; |
ccffad25 | 1049 | struct netdev_hw_addr *ha; |
32e7bfc4 | 1050 | int uc_count; |
4cd24eaf | 1051 | int mc_count; |
f565a7c2 AW |
1052 | void *buf; |
1053 | int i; | |
2af7698e | 1054 | |
788a8b6d | 1055 | /* We can't dynamically set ndo_set_rx_mode, so return gracefully */ |
2af7698e AW |
1056 | if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_RX)) |
1057 | return; | |
1058 | ||
f565a7c2 AW |
1059 | promisc = ((dev->flags & IFF_PROMISC) != 0); |
1060 | allmulti = ((dev->flags & IFF_ALLMULTI) != 0); | |
2af7698e | 1061 | |
23e258e1 | 1062 | sg_init_one(sg, &promisc, sizeof(promisc)); |
2af7698e AW |
1063 | |
1064 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX, | |
d24bae32 | 1065 | VIRTIO_NET_CTRL_RX_PROMISC, sg)) |
2af7698e AW |
1066 | dev_warn(&dev->dev, "Failed to %sable promisc mode.\n", |
1067 | promisc ? "en" : "dis"); | |
1068 | ||
23e258e1 | 1069 | sg_init_one(sg, &allmulti, sizeof(allmulti)); |
2af7698e AW |
1070 | |
1071 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX, | |
d24bae32 | 1072 | VIRTIO_NET_CTRL_RX_ALLMULTI, sg)) |
2af7698e AW |
1073 | dev_warn(&dev->dev, "Failed to %sable allmulti mode.\n", |
1074 | allmulti ? "en" : "dis"); | |
f565a7c2 | 1075 | |
32e7bfc4 | 1076 | uc_count = netdev_uc_count(dev); |
4cd24eaf | 1077 | mc_count = netdev_mc_count(dev); |
f565a7c2 | 1078 | /* MAC filter - use one buffer for both lists */ |
4cd24eaf JP |
1079 | buf = kzalloc(((uc_count + mc_count) * ETH_ALEN) + |
1080 | (2 * sizeof(mac_data->entries)), GFP_ATOMIC); | |
1081 | mac_data = buf; | |
e68ed8f0 | 1082 | if (!buf) |
f565a7c2 | 1083 | return; |
f565a7c2 | 1084 | |
23e258e1 AW |
1085 | sg_init_table(sg, 2); |
1086 | ||
f565a7c2 | 1087 | /* Store the unicast list and count in the front of the buffer */ |
32e7bfc4 | 1088 | mac_data->entries = uc_count; |
ccffad25 | 1089 | i = 0; |
32e7bfc4 | 1090 | netdev_for_each_uc_addr(ha, dev) |
ccffad25 | 1091 | memcpy(&mac_data->macs[i++][0], ha->addr, ETH_ALEN); |
f565a7c2 AW |
1092 | |
1093 | sg_set_buf(&sg[0], mac_data, | |
32e7bfc4 | 1094 | sizeof(mac_data->entries) + (uc_count * ETH_ALEN)); |
f565a7c2 AW |
1095 | |
1096 | /* multicast list and count fill the end */ | |
32e7bfc4 | 1097 | mac_data = (void *)&mac_data->macs[uc_count][0]; |
f565a7c2 | 1098 | |
4cd24eaf | 1099 | mac_data->entries = mc_count; |
567ec874 | 1100 | i = 0; |
22bedad3 JP |
1101 | netdev_for_each_mc_addr(ha, dev) |
1102 | memcpy(&mac_data->macs[i++][0], ha->addr, ETH_ALEN); | |
f565a7c2 AW |
1103 | |
1104 | sg_set_buf(&sg[1], mac_data, | |
4cd24eaf | 1105 | sizeof(mac_data->entries) + (mc_count * ETH_ALEN)); |
f565a7c2 AW |
1106 | |
1107 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC, | |
d24bae32 | 1108 | VIRTIO_NET_CTRL_MAC_TABLE_SET, sg)) |
99e872ae | 1109 | dev_warn(&dev->dev, "Failed to set MAC filter table.\n"); |
f565a7c2 AW |
1110 | |
1111 | kfree(buf); | |
2af7698e AW |
1112 | } |
1113 | ||
80d5c368 PM |
1114 | static int virtnet_vlan_rx_add_vid(struct net_device *dev, |
1115 | __be16 proto, u16 vid) | |
0bde9569 AW |
1116 | { |
1117 | struct virtnet_info *vi = netdev_priv(dev); | |
1118 | struct scatterlist sg; | |
1119 | ||
23e258e1 | 1120 | sg_init_one(&sg, &vid, sizeof(vid)); |
0bde9569 AW |
1121 | |
1122 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN, | |
d24bae32 | 1123 | VIRTIO_NET_CTRL_VLAN_ADD, &sg)) |
0bde9569 | 1124 | dev_warn(&dev->dev, "Failed to add VLAN ID %d.\n", vid); |
8e586137 | 1125 | return 0; |
0bde9569 AW |
1126 | } |
1127 | ||
80d5c368 PM |
1128 | static int virtnet_vlan_rx_kill_vid(struct net_device *dev, |
1129 | __be16 proto, u16 vid) | |
0bde9569 AW |
1130 | { |
1131 | struct virtnet_info *vi = netdev_priv(dev); | |
1132 | struct scatterlist sg; | |
1133 | ||
23e258e1 | 1134 | sg_init_one(&sg, &vid, sizeof(vid)); |
0bde9569 AW |
1135 | |
1136 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN, | |
d24bae32 | 1137 | VIRTIO_NET_CTRL_VLAN_DEL, &sg)) |
0bde9569 | 1138 | dev_warn(&dev->dev, "Failed to kill VLAN ID %d.\n", vid); |
8e586137 | 1139 | return 0; |
0bde9569 AW |
1140 | } |
1141 | ||
8898c21c | 1142 | static void virtnet_clean_affinity(struct virtnet_info *vi, long hcpu) |
986a4f4d JW |
1143 | { |
1144 | int i; | |
1145 | ||
8898c21c WG |
1146 | if (vi->affinity_hint_set) { |
1147 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
47be2479 WG |
1148 | virtqueue_set_affinity(vi->rq[i].vq, -1); |
1149 | virtqueue_set_affinity(vi->sq[i].vq, -1); | |
1150 | } | |
1151 | ||
8898c21c WG |
1152 | vi->affinity_hint_set = false; |
1153 | } | |
8898c21c | 1154 | } |
47be2479 | 1155 | |
8898c21c WG |
1156 | static void virtnet_set_affinity(struct virtnet_info *vi) |
1157 | { | |
1158 | int i; | |
1159 | int cpu; | |
986a4f4d JW |
1160 | |
1161 | /* In multiqueue mode, when the number of cpu is equal to the number of | |
1162 | * queue pairs, we let the queue pairs to be private to one cpu by | |
1163 | * setting the affinity hint to eliminate the contention. | |
1164 | */ | |
8898c21c WG |
1165 | if (vi->curr_queue_pairs == 1 || |
1166 | vi->max_queue_pairs != num_online_cpus()) { | |
1167 | virtnet_clean_affinity(vi, -1); | |
1168 | return; | |
986a4f4d JW |
1169 | } |
1170 | ||
8898c21c WG |
1171 | i = 0; |
1172 | for_each_online_cpu(cpu) { | |
986a4f4d JW |
1173 | virtqueue_set_affinity(vi->rq[i].vq, cpu); |
1174 | virtqueue_set_affinity(vi->sq[i].vq, cpu); | |
9bb8ca86 | 1175 | netif_set_xps_queue(vi->dev, cpumask_of(cpu), i); |
8898c21c | 1176 | i++; |
986a4f4d JW |
1177 | } |
1178 | ||
8898c21c | 1179 | vi->affinity_hint_set = true; |
986a4f4d JW |
1180 | } |
1181 | ||
8de4b2f3 WG |
1182 | static int virtnet_cpu_callback(struct notifier_block *nfb, |
1183 | unsigned long action, void *hcpu) | |
1184 | { | |
1185 | struct virtnet_info *vi = container_of(nfb, struct virtnet_info, nb); | |
1186 | ||
1187 | switch(action & ~CPU_TASKS_FROZEN) { | |
1188 | case CPU_ONLINE: | |
1189 | case CPU_DOWN_FAILED: | |
1190 | case CPU_DEAD: | |
1191 | virtnet_set_affinity(vi); | |
1192 | break; | |
1193 | case CPU_DOWN_PREPARE: | |
1194 | virtnet_clean_affinity(vi, (long)hcpu); | |
1195 | break; | |
1196 | default: | |
1197 | break; | |
1198 | } | |
3ab098df | 1199 | |
8de4b2f3 | 1200 | return NOTIFY_OK; |
986a4f4d JW |
1201 | } |
1202 | ||
8f9f4668 RJ |
1203 | static void virtnet_get_ringparam(struct net_device *dev, |
1204 | struct ethtool_ringparam *ring) | |
1205 | { | |
1206 | struct virtnet_info *vi = netdev_priv(dev); | |
1207 | ||
986a4f4d JW |
1208 | ring->rx_max_pending = virtqueue_get_vring_size(vi->rq[0].vq); |
1209 | ring->tx_max_pending = virtqueue_get_vring_size(vi->sq[0].vq); | |
8f9f4668 RJ |
1210 | ring->rx_pending = ring->rx_max_pending; |
1211 | ring->tx_pending = ring->tx_max_pending; | |
8f9f4668 RJ |
1212 | } |
1213 | ||
66846048 RJ |
1214 | |
1215 | static void virtnet_get_drvinfo(struct net_device *dev, | |
1216 | struct ethtool_drvinfo *info) | |
1217 | { | |
1218 | struct virtnet_info *vi = netdev_priv(dev); | |
1219 | struct virtio_device *vdev = vi->vdev; | |
1220 | ||
1221 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); | |
1222 | strlcpy(info->version, VIRTNET_DRIVER_VERSION, sizeof(info->version)); | |
1223 | strlcpy(info->bus_info, virtio_bus_name(vdev), sizeof(info->bus_info)); | |
1224 | ||
1225 | } | |
1226 | ||
d73bcd2c JW |
1227 | /* TODO: Eliminate OOO packets during switching */ |
1228 | static int virtnet_set_channels(struct net_device *dev, | |
1229 | struct ethtool_channels *channels) | |
1230 | { | |
1231 | struct virtnet_info *vi = netdev_priv(dev); | |
1232 | u16 queue_pairs = channels->combined_count; | |
1233 | int err; | |
1234 | ||
1235 | /* We don't support separate rx/tx channels. | |
1236 | * We don't allow setting 'other' channels. | |
1237 | */ | |
1238 | if (channels->rx_count || channels->tx_count || channels->other_count) | |
1239 | return -EINVAL; | |
1240 | ||
1241 | if (queue_pairs > vi->max_queue_pairs) | |
1242 | return -EINVAL; | |
1243 | ||
47be2479 | 1244 | get_online_cpus(); |
d73bcd2c JW |
1245 | err = virtnet_set_queues(vi, queue_pairs); |
1246 | if (!err) { | |
1247 | netif_set_real_num_tx_queues(dev, queue_pairs); | |
1248 | netif_set_real_num_rx_queues(dev, queue_pairs); | |
1249 | ||
8898c21c | 1250 | virtnet_set_affinity(vi); |
d73bcd2c | 1251 | } |
47be2479 | 1252 | put_online_cpus(); |
d73bcd2c JW |
1253 | |
1254 | return err; | |
1255 | } | |
1256 | ||
1257 | static void virtnet_get_channels(struct net_device *dev, | |
1258 | struct ethtool_channels *channels) | |
1259 | { | |
1260 | struct virtnet_info *vi = netdev_priv(dev); | |
1261 | ||
1262 | channels->combined_count = vi->curr_queue_pairs; | |
1263 | channels->max_combined = vi->max_queue_pairs; | |
1264 | channels->max_other = 0; | |
1265 | channels->rx_count = 0; | |
1266 | channels->tx_count = 0; | |
1267 | channels->other_count = 0; | |
1268 | } | |
1269 | ||
0fc0b732 | 1270 | static const struct ethtool_ops virtnet_ethtool_ops = { |
66846048 | 1271 | .get_drvinfo = virtnet_get_drvinfo, |
9f4d26d0 | 1272 | .get_link = ethtool_op_get_link, |
8f9f4668 | 1273 | .get_ringparam = virtnet_get_ringparam, |
d73bcd2c JW |
1274 | .set_channels = virtnet_set_channels, |
1275 | .get_channels = virtnet_get_channels, | |
a9ea3fc6 HX |
1276 | }; |
1277 | ||
39da5814 MM |
1278 | #define MIN_MTU 68 |
1279 | #define MAX_MTU 65535 | |
1280 | ||
1281 | static int virtnet_change_mtu(struct net_device *dev, int new_mtu) | |
1282 | { | |
1283 | if (new_mtu < MIN_MTU || new_mtu > MAX_MTU) | |
1284 | return -EINVAL; | |
1285 | dev->mtu = new_mtu; | |
1286 | return 0; | |
1287 | } | |
1288 | ||
76288b4e SH |
1289 | static const struct net_device_ops virtnet_netdev = { |
1290 | .ndo_open = virtnet_open, | |
1291 | .ndo_stop = virtnet_close, | |
1292 | .ndo_start_xmit = start_xmit, | |
1293 | .ndo_validate_addr = eth_validate_addr, | |
9c46f6d4 | 1294 | .ndo_set_mac_address = virtnet_set_mac_address, |
2af7698e | 1295 | .ndo_set_rx_mode = virtnet_set_rx_mode, |
76288b4e | 1296 | .ndo_change_mtu = virtnet_change_mtu, |
3fa2a1df | 1297 | .ndo_get_stats64 = virtnet_stats, |
1824a989 AW |
1298 | .ndo_vlan_rx_add_vid = virtnet_vlan_rx_add_vid, |
1299 | .ndo_vlan_rx_kill_vid = virtnet_vlan_rx_kill_vid, | |
76288b4e SH |
1300 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1301 | .ndo_poll_controller = virtnet_netpoll, | |
1302 | #endif | |
1303 | }; | |
1304 | ||
586d17c5 | 1305 | static void virtnet_config_changed_work(struct work_struct *work) |
9f4d26d0 | 1306 | { |
586d17c5 JW |
1307 | struct virtnet_info *vi = |
1308 | container_of(work, struct virtnet_info, config_work); | |
9f4d26d0 MM |
1309 | u16 v; |
1310 | ||
586d17c5 JW |
1311 | mutex_lock(&vi->config_lock); |
1312 | if (!vi->config_enable) | |
1313 | goto done; | |
1314 | ||
855e0c52 RR |
1315 | if (virtio_cread_feature(vi->vdev, VIRTIO_NET_F_STATUS, |
1316 | struct virtio_net_config, status, &v) < 0) | |
586d17c5 JW |
1317 | goto done; |
1318 | ||
1319 | if (v & VIRTIO_NET_S_ANNOUNCE) { | |
ee89bab1 | 1320 | netdev_notify_peers(vi->dev); |
586d17c5 JW |
1321 | virtnet_ack_link_announce(vi); |
1322 | } | |
9f4d26d0 MM |
1323 | |
1324 | /* Ignore unknown (future) status bits */ | |
1325 | v &= VIRTIO_NET_S_LINK_UP; | |
1326 | ||
1327 | if (vi->status == v) | |
586d17c5 | 1328 | goto done; |
9f4d26d0 MM |
1329 | |
1330 | vi->status = v; | |
1331 | ||
1332 | if (vi->status & VIRTIO_NET_S_LINK_UP) { | |
1333 | netif_carrier_on(vi->dev); | |
986a4f4d | 1334 | netif_tx_wake_all_queues(vi->dev); |
9f4d26d0 MM |
1335 | } else { |
1336 | netif_carrier_off(vi->dev); | |
986a4f4d | 1337 | netif_tx_stop_all_queues(vi->dev); |
9f4d26d0 | 1338 | } |
586d17c5 JW |
1339 | done: |
1340 | mutex_unlock(&vi->config_lock); | |
9f4d26d0 MM |
1341 | } |
1342 | ||
1343 | static void virtnet_config_changed(struct virtio_device *vdev) | |
1344 | { | |
1345 | struct virtnet_info *vi = vdev->priv; | |
1346 | ||
3b07e9ca | 1347 | schedule_work(&vi->config_work); |
9f4d26d0 MM |
1348 | } |
1349 | ||
986a4f4d JW |
1350 | static void virtnet_free_queues(struct virtnet_info *vi) |
1351 | { | |
d4fb84ee AV |
1352 | int i; |
1353 | ||
1354 | for (i = 0; i < vi->max_queue_pairs; i++) | |
1355 | netif_napi_del(&vi->rq[i].napi); | |
1356 | ||
986a4f4d JW |
1357 | kfree(vi->rq); |
1358 | kfree(vi->sq); | |
1359 | } | |
1360 | ||
1361 | static void free_receive_bufs(struct virtnet_info *vi) | |
1362 | { | |
1363 | int i; | |
1364 | ||
1365 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1366 | while (vi->rq[i].pages) | |
1367 | __free_pages(get_a_page(&vi->rq[i], GFP_KERNEL), 0); | |
1368 | } | |
1369 | } | |
1370 | ||
1371 | static void free_unused_bufs(struct virtnet_info *vi) | |
1372 | { | |
1373 | void *buf; | |
1374 | int i; | |
1375 | ||
1376 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1377 | struct virtqueue *vq = vi->sq[i].vq; | |
1378 | while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) | |
1379 | dev_kfree_skb(buf); | |
1380 | } | |
1381 | ||
1382 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1383 | struct virtqueue *vq = vi->rq[i].vq; | |
1384 | ||
1385 | while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) { | |
fa9fac17 | 1386 | if (vi->mergeable_rx_bufs) |
2613af0e | 1387 | put_page(virt_to_head_page(buf)); |
fa9fac17 AV |
1388 | else if (vi->big_packets) |
1389 | give_pages(&vi->rq[i], buf); | |
986a4f4d JW |
1390 | else |
1391 | dev_kfree_skb(buf); | |
986a4f4d | 1392 | } |
986a4f4d JW |
1393 | } |
1394 | } | |
1395 | ||
e9d7417b JW |
1396 | static void virtnet_del_vqs(struct virtnet_info *vi) |
1397 | { | |
1398 | struct virtio_device *vdev = vi->vdev; | |
1399 | ||
8898c21c | 1400 | virtnet_clean_affinity(vi, -1); |
986a4f4d | 1401 | |
e9d7417b | 1402 | vdev->config->del_vqs(vdev); |
986a4f4d JW |
1403 | |
1404 | virtnet_free_queues(vi); | |
e9d7417b JW |
1405 | } |
1406 | ||
986a4f4d | 1407 | static int virtnet_find_vqs(struct virtnet_info *vi) |
3f9c10b0 | 1408 | { |
986a4f4d JW |
1409 | vq_callback_t **callbacks; |
1410 | struct virtqueue **vqs; | |
1411 | int ret = -ENOMEM; | |
1412 | int i, total_vqs; | |
1413 | const char **names; | |
1414 | ||
1415 | /* We expect 1 RX virtqueue followed by 1 TX virtqueue, followed by | |
1416 | * possible N-1 RX/TX queue pairs used in multiqueue mode, followed by | |
1417 | * possible control vq. | |
1418 | */ | |
1419 | total_vqs = vi->max_queue_pairs * 2 + | |
1420 | virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ); | |
1421 | ||
1422 | /* Allocate space for find_vqs parameters */ | |
1423 | vqs = kzalloc(total_vqs * sizeof(*vqs), GFP_KERNEL); | |
1424 | if (!vqs) | |
1425 | goto err_vq; | |
1426 | callbacks = kmalloc(total_vqs * sizeof(*callbacks), GFP_KERNEL); | |
1427 | if (!callbacks) | |
1428 | goto err_callback; | |
1429 | names = kmalloc(total_vqs * sizeof(*names), GFP_KERNEL); | |
1430 | if (!names) | |
1431 | goto err_names; | |
1432 | ||
1433 | /* Parameters for control virtqueue, if any */ | |
1434 | if (vi->has_cvq) { | |
1435 | callbacks[total_vqs - 1] = NULL; | |
1436 | names[total_vqs - 1] = "control"; | |
1437 | } | |
3f9c10b0 | 1438 | |
986a4f4d JW |
1439 | /* Allocate/initialize parameters for send/receive virtqueues */ |
1440 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1441 | callbacks[rxq2vq(i)] = skb_recv_done; | |
1442 | callbacks[txq2vq(i)] = skb_xmit_done; | |
1443 | sprintf(vi->rq[i].name, "input.%d", i); | |
1444 | sprintf(vi->sq[i].name, "output.%d", i); | |
1445 | names[rxq2vq(i)] = vi->rq[i].name; | |
1446 | names[txq2vq(i)] = vi->sq[i].name; | |
1447 | } | |
3f9c10b0 | 1448 | |
986a4f4d JW |
1449 | ret = vi->vdev->config->find_vqs(vi->vdev, total_vqs, vqs, callbacks, |
1450 | names); | |
1451 | if (ret) | |
1452 | goto err_find; | |
3f9c10b0 | 1453 | |
986a4f4d JW |
1454 | if (vi->has_cvq) { |
1455 | vi->cvq = vqs[total_vqs - 1]; | |
3f9c10b0 | 1456 | if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VLAN)) |
f646968f | 1457 | vi->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; |
3f9c10b0 | 1458 | } |
986a4f4d JW |
1459 | |
1460 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1461 | vi->rq[i].vq = vqs[rxq2vq(i)]; | |
1462 | vi->sq[i].vq = vqs[txq2vq(i)]; | |
1463 | } | |
1464 | ||
1465 | kfree(names); | |
1466 | kfree(callbacks); | |
1467 | kfree(vqs); | |
1468 | ||
3f9c10b0 | 1469 | return 0; |
986a4f4d JW |
1470 | |
1471 | err_find: | |
1472 | kfree(names); | |
1473 | err_names: | |
1474 | kfree(callbacks); | |
1475 | err_callback: | |
1476 | kfree(vqs); | |
1477 | err_vq: | |
1478 | return ret; | |
1479 | } | |
1480 | ||
1481 | static int virtnet_alloc_queues(struct virtnet_info *vi) | |
1482 | { | |
1483 | int i; | |
1484 | ||
1485 | vi->sq = kzalloc(sizeof(*vi->sq) * vi->max_queue_pairs, GFP_KERNEL); | |
1486 | if (!vi->sq) | |
1487 | goto err_sq; | |
1488 | vi->rq = kzalloc(sizeof(*vi->rq) * vi->max_queue_pairs, GFP_KERNEL); | |
008d4278 | 1489 | if (!vi->rq) |
986a4f4d JW |
1490 | goto err_rq; |
1491 | ||
1492 | INIT_DELAYED_WORK(&vi->refill, refill_work); | |
1493 | for (i = 0; i < vi->max_queue_pairs; i++) { | |
1494 | vi->rq[i].pages = NULL; | |
1495 | netif_napi_add(vi->dev, &vi->rq[i].napi, virtnet_poll, | |
1496 | napi_weight); | |
1497 | ||
1498 | sg_init_table(vi->rq[i].sg, ARRAY_SIZE(vi->rq[i].sg)); | |
1499 | sg_init_table(vi->sq[i].sg, ARRAY_SIZE(vi->sq[i].sg)); | |
1500 | } | |
1501 | ||
1502 | return 0; | |
1503 | ||
1504 | err_rq: | |
1505 | kfree(vi->sq); | |
1506 | err_sq: | |
1507 | return -ENOMEM; | |
1508 | } | |
1509 | ||
1510 | static int init_vqs(struct virtnet_info *vi) | |
1511 | { | |
1512 | int ret; | |
1513 | ||
1514 | /* Allocate send & receive queues */ | |
1515 | ret = virtnet_alloc_queues(vi); | |
1516 | if (ret) | |
1517 | goto err; | |
1518 | ||
1519 | ret = virtnet_find_vqs(vi); | |
1520 | if (ret) | |
1521 | goto err_free; | |
1522 | ||
47be2479 | 1523 | get_online_cpus(); |
8898c21c | 1524 | virtnet_set_affinity(vi); |
47be2479 WG |
1525 | put_online_cpus(); |
1526 | ||
986a4f4d JW |
1527 | return 0; |
1528 | ||
1529 | err_free: | |
1530 | virtnet_free_queues(vi); | |
1531 | err: | |
1532 | return ret; | |
3f9c10b0 AS |
1533 | } |
1534 | ||
296f96fc RR |
1535 | static int virtnet_probe(struct virtio_device *vdev) |
1536 | { | |
986a4f4d | 1537 | int i, err; |
296f96fc RR |
1538 | struct net_device *dev; |
1539 | struct virtnet_info *vi; | |
986a4f4d JW |
1540 | u16 max_queue_pairs; |
1541 | ||
1542 | /* Find if host supports multiqueue virtio_net device */ | |
855e0c52 RR |
1543 | err = virtio_cread_feature(vdev, VIRTIO_NET_F_MQ, |
1544 | struct virtio_net_config, | |
1545 | max_virtqueue_pairs, &max_queue_pairs); | |
986a4f4d JW |
1546 | |
1547 | /* We need at least 2 queue's */ | |
1548 | if (err || max_queue_pairs < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || | |
1549 | max_queue_pairs > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || | |
1550 | !virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) | |
1551 | max_queue_pairs = 1; | |
296f96fc RR |
1552 | |
1553 | /* Allocate ourselves a network device with room for our info */ | |
986a4f4d | 1554 | dev = alloc_etherdev_mq(sizeof(struct virtnet_info), max_queue_pairs); |
296f96fc RR |
1555 | if (!dev) |
1556 | return -ENOMEM; | |
1557 | ||
1558 | /* Set up network device as normal. */ | |
f2f2c8b4 | 1559 | dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; |
76288b4e | 1560 | dev->netdev_ops = &virtnet_netdev; |
296f96fc | 1561 | dev->features = NETIF_F_HIGHDMA; |
3fa2a1df | 1562 | |
a9ea3fc6 | 1563 | SET_ETHTOOL_OPS(dev, &virtnet_ethtool_ops); |
296f96fc RR |
1564 | SET_NETDEV_DEV(dev, &vdev->dev); |
1565 | ||
1566 | /* Do we support "hardware" checksums? */ | |
98e778c9 | 1567 | if (virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) { |
296f96fc | 1568 | /* This opens up the world of extra features. */ |
98e778c9 MM |
1569 | dev->hw_features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; |
1570 | if (csum) | |
1571 | dev->features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; | |
1572 | ||
1573 | if (virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) { | |
1574 | dev->hw_features |= NETIF_F_TSO | NETIF_F_UFO | |
34a48579 RR |
1575 | | NETIF_F_TSO_ECN | NETIF_F_TSO6; |
1576 | } | |
5539ae96 | 1577 | /* Individual feature bits: what can host handle? */ |
98e778c9 MM |
1578 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO4)) |
1579 | dev->hw_features |= NETIF_F_TSO; | |
1580 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO6)) | |
1581 | dev->hw_features |= NETIF_F_TSO6; | |
1582 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN)) | |
1583 | dev->hw_features |= NETIF_F_TSO_ECN; | |
1584 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_UFO)) | |
1585 | dev->hw_features |= NETIF_F_UFO; | |
1586 | ||
1587 | if (gso) | |
1588 | dev->features |= dev->hw_features & (NETIF_F_ALL_TSO|NETIF_F_UFO); | |
1589 | /* (!csum && gso) case will be fixed by register_netdev() */ | |
296f96fc | 1590 | } |
4f49129b TH |
1591 | if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_CSUM)) |
1592 | dev->features |= NETIF_F_RXCSUM; | |
296f96fc | 1593 | |
4fda8302 JW |
1594 | dev->vlan_features = dev->features; |
1595 | ||
296f96fc | 1596 | /* Configuration may specify what MAC to use. Otherwise random. */ |
855e0c52 RR |
1597 | if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) |
1598 | virtio_cread_bytes(vdev, | |
1599 | offsetof(struct virtio_net_config, mac), | |
1600 | dev->dev_addr, dev->addr_len); | |
1601 | else | |
f2cedb63 | 1602 | eth_hw_addr_random(dev); |
296f96fc RR |
1603 | |
1604 | /* Set up our device-specific information */ | |
1605 | vi = netdev_priv(dev); | |
296f96fc RR |
1606 | vi->dev = dev; |
1607 | vi->vdev = vdev; | |
d9d5dcc8 | 1608 | vdev->priv = vi; |
3fa2a1df | 1609 | vi->stats = alloc_percpu(struct virtnet_stats); |
1610 | err = -ENOMEM; | |
1611 | if (vi->stats == NULL) | |
1612 | goto free; | |
1613 | ||
827da44c JS |
1614 | for_each_possible_cpu(i) { |
1615 | struct virtnet_stats *virtnet_stats; | |
1616 | virtnet_stats = per_cpu_ptr(vi->stats, i); | |
1617 | u64_stats_init(&virtnet_stats->tx_syncp); | |
1618 | u64_stats_init(&virtnet_stats->rx_syncp); | |
1619 | } | |
1620 | ||
586d17c5 JW |
1621 | mutex_init(&vi->config_lock); |
1622 | vi->config_enable = true; | |
1623 | INIT_WORK(&vi->config_work, virtnet_config_changed_work); | |
296f96fc | 1624 | |
97402b96 | 1625 | /* If we can receive ANY GSO packets, we must allocate large ones. */ |
8e95a202 JP |
1626 | if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) || |
1627 | virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6) || | |
1628 | virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ECN)) | |
97402b96 HX |
1629 | vi->big_packets = true; |
1630 | ||
3f2c31d9 MM |
1631 | if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF)) |
1632 | vi->mergeable_rx_bufs = true; | |
1633 | ||
e7428e95 MT |
1634 | if (virtio_has_feature(vdev, VIRTIO_F_ANY_LAYOUT)) |
1635 | vi->any_header_sg = true; | |
1636 | ||
986a4f4d JW |
1637 | if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) |
1638 | vi->has_cvq = true; | |
1639 | ||
1640 | /* Use single tx/rx queue pair as default */ | |
1641 | vi->curr_queue_pairs = 1; | |
1642 | vi->max_queue_pairs = max_queue_pairs; | |
1643 | ||
1644 | /* Allocate/initialize the rx/tx queues, and invoke find_vqs */ | |
3f9c10b0 | 1645 | err = init_vqs(vi); |
d2a7ddda | 1646 | if (err) |
9bb8ca86 | 1647 | goto free_stats; |
296f96fc | 1648 | |
0f13b66b ZYW |
1649 | netif_set_real_num_tx_queues(dev, vi->curr_queue_pairs); |
1650 | netif_set_real_num_rx_queues(dev, vi->curr_queue_pairs); | |
986a4f4d | 1651 | |
296f96fc RR |
1652 | err = register_netdev(dev); |
1653 | if (err) { | |
1654 | pr_debug("virtio_net: registering device failed\n"); | |
d2a7ddda | 1655 | goto free_vqs; |
296f96fc | 1656 | } |
b3369c1f RR |
1657 | |
1658 | /* Last of all, set up some receive buffers. */ | |
55257d72 | 1659 | for (i = 0; i < vi->curr_queue_pairs; i++) { |
986a4f4d JW |
1660 | try_fill_recv(&vi->rq[i], GFP_KERNEL); |
1661 | ||
1662 | /* If we didn't even get one input buffer, we're useless. */ | |
be121f46 JW |
1663 | if (vi->rq[i].vq->num_free == |
1664 | virtqueue_get_vring_size(vi->rq[i].vq)) { | |
986a4f4d JW |
1665 | free_unused_bufs(vi); |
1666 | err = -ENOMEM; | |
1667 | goto free_recv_bufs; | |
1668 | } | |
b3369c1f RR |
1669 | } |
1670 | ||
8de4b2f3 WG |
1671 | vi->nb.notifier_call = &virtnet_cpu_callback; |
1672 | err = register_hotcpu_notifier(&vi->nb); | |
1673 | if (err) { | |
1674 | pr_debug("virtio_net: registering cpu notifier failed\n"); | |
1675 | goto free_recv_bufs; | |
1676 | } | |
1677 | ||
167c25e4 JW |
1678 | /* Assume link up if device can't report link status, |
1679 | otherwise get link status from config. */ | |
1680 | if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_STATUS)) { | |
1681 | netif_carrier_off(dev); | |
3b07e9ca | 1682 | schedule_work(&vi->config_work); |
167c25e4 JW |
1683 | } else { |
1684 | vi->status = VIRTIO_NET_S_LINK_UP; | |
1685 | netif_carrier_on(dev); | |
1686 | } | |
9f4d26d0 | 1687 | |
986a4f4d JW |
1688 | pr_debug("virtnet: registered device %s with %d RX and TX vq's\n", |
1689 | dev->name, max_queue_pairs); | |
1690 | ||
296f96fc RR |
1691 | return 0; |
1692 | ||
986a4f4d JW |
1693 | free_recv_bufs: |
1694 | free_receive_bufs(vi); | |
b3369c1f | 1695 | unregister_netdev(dev); |
d2a7ddda | 1696 | free_vqs: |
986a4f4d | 1697 | cancel_delayed_work_sync(&vi->refill); |
e9d7417b | 1698 | virtnet_del_vqs(vi); |
2613af0e MD |
1699 | if (vi->alloc_frag.page) |
1700 | put_page(vi->alloc_frag.page); | |
3fa2a1df | 1701 | free_stats: |
1702 | free_percpu(vi->stats); | |
296f96fc RR |
1703 | free: |
1704 | free_netdev(dev); | |
1705 | return err; | |
1706 | } | |
1707 | ||
04486ed0 | 1708 | static void remove_vq_common(struct virtnet_info *vi) |
296f96fc | 1709 | { |
04486ed0 | 1710 | vi->vdev->config->reset(vi->vdev); |
830a8a97 SM |
1711 | |
1712 | /* Free unused buffers in both send and recv, if any. */ | |
9ab86bbc | 1713 | free_unused_bufs(vi); |
fb6813f4 | 1714 | |
986a4f4d | 1715 | free_receive_bufs(vi); |
d2a7ddda | 1716 | |
986a4f4d | 1717 | virtnet_del_vqs(vi); |
04486ed0 AS |
1718 | } |
1719 | ||
8cc085d6 | 1720 | static void virtnet_remove(struct virtio_device *vdev) |
04486ed0 AS |
1721 | { |
1722 | struct virtnet_info *vi = vdev->priv; | |
1723 | ||
8de4b2f3 WG |
1724 | unregister_hotcpu_notifier(&vi->nb); |
1725 | ||
586d17c5 JW |
1726 | /* Prevent config work handler from accessing the device. */ |
1727 | mutex_lock(&vi->config_lock); | |
1728 | vi->config_enable = false; | |
1729 | mutex_unlock(&vi->config_lock); | |
1730 | ||
04486ed0 AS |
1731 | unregister_netdev(vi->dev); |
1732 | ||
1733 | remove_vq_common(vi); | |
2613af0e MD |
1734 | if (vi->alloc_frag.page) |
1735 | put_page(vi->alloc_frag.page); | |
fb6813f4 | 1736 | |
586d17c5 JW |
1737 | flush_work(&vi->config_work); |
1738 | ||
2e66f55b | 1739 | free_percpu(vi->stats); |
74b2553f | 1740 | free_netdev(vi->dev); |
296f96fc RR |
1741 | } |
1742 | ||
89107000 | 1743 | #ifdef CONFIG_PM_SLEEP |
0741bcb5 AS |
1744 | static int virtnet_freeze(struct virtio_device *vdev) |
1745 | { | |
1746 | struct virtnet_info *vi = vdev->priv; | |
986a4f4d | 1747 | int i; |
0741bcb5 | 1748 | |
ec9debbd JW |
1749 | unregister_hotcpu_notifier(&vi->nb); |
1750 | ||
586d17c5 JW |
1751 | /* Prevent config work handler from accessing the device */ |
1752 | mutex_lock(&vi->config_lock); | |
1753 | vi->config_enable = false; | |
1754 | mutex_unlock(&vi->config_lock); | |
1755 | ||
0741bcb5 AS |
1756 | netif_device_detach(vi->dev); |
1757 | cancel_delayed_work_sync(&vi->refill); | |
1758 | ||
1759 | if (netif_running(vi->dev)) | |
986a4f4d JW |
1760 | for (i = 0; i < vi->max_queue_pairs; i++) { |
1761 | napi_disable(&vi->rq[i].napi); | |
1762 | netif_napi_del(&vi->rq[i].napi); | |
1763 | } | |
0741bcb5 AS |
1764 | |
1765 | remove_vq_common(vi); | |
1766 | ||
586d17c5 JW |
1767 | flush_work(&vi->config_work); |
1768 | ||
0741bcb5 AS |
1769 | return 0; |
1770 | } | |
1771 | ||
1772 | static int virtnet_restore(struct virtio_device *vdev) | |
1773 | { | |
1774 | struct virtnet_info *vi = vdev->priv; | |
986a4f4d | 1775 | int err, i; |
0741bcb5 AS |
1776 | |
1777 | err = init_vqs(vi); | |
1778 | if (err) | |
1779 | return err; | |
1780 | ||
6cd4ce00 JW |
1781 | if (netif_running(vi->dev)) { |
1782 | for (i = 0; i < vi->curr_queue_pairs; i++) | |
1783 | if (!try_fill_recv(&vi->rq[i], GFP_KERNEL)) | |
1784 | schedule_delayed_work(&vi->refill, 0); | |
1785 | ||
986a4f4d JW |
1786 | for (i = 0; i < vi->max_queue_pairs; i++) |
1787 | virtnet_napi_enable(&vi->rq[i]); | |
6cd4ce00 | 1788 | } |
0741bcb5 AS |
1789 | |
1790 | netif_device_attach(vi->dev); | |
1791 | ||
586d17c5 JW |
1792 | mutex_lock(&vi->config_lock); |
1793 | vi->config_enable = true; | |
1794 | mutex_unlock(&vi->config_lock); | |
1795 | ||
35ed159b | 1796 | rtnl_lock(); |
986a4f4d | 1797 | virtnet_set_queues(vi, vi->curr_queue_pairs); |
35ed159b | 1798 | rtnl_unlock(); |
986a4f4d | 1799 | |
ec9debbd JW |
1800 | err = register_hotcpu_notifier(&vi->nb); |
1801 | if (err) | |
1802 | return err; | |
1803 | ||
0741bcb5 AS |
1804 | return 0; |
1805 | } | |
1806 | #endif | |
1807 | ||
296f96fc RR |
1808 | static struct virtio_device_id id_table[] = { |
1809 | { VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID }, | |
1810 | { 0 }, | |
1811 | }; | |
1812 | ||
c45a6816 | 1813 | static unsigned int features[] = { |
5e4fe5c4 MM |
1814 | VIRTIO_NET_F_CSUM, VIRTIO_NET_F_GUEST_CSUM, |
1815 | VIRTIO_NET_F_GSO, VIRTIO_NET_F_MAC, | |
c45a6816 | 1816 | VIRTIO_NET_F_HOST_TSO4, VIRTIO_NET_F_HOST_UFO, VIRTIO_NET_F_HOST_TSO6, |
97402b96 | 1817 | VIRTIO_NET_F_HOST_ECN, VIRTIO_NET_F_GUEST_TSO4, VIRTIO_NET_F_GUEST_TSO6, |
5c516751 | 1818 | VIRTIO_NET_F_GUEST_ECN, VIRTIO_NET_F_GUEST_UFO, |
2a41f71d | 1819 | VIRTIO_NET_F_MRG_RXBUF, VIRTIO_NET_F_STATUS, VIRTIO_NET_F_CTRL_VQ, |
0bde9569 | 1820 | VIRTIO_NET_F_CTRL_RX, VIRTIO_NET_F_CTRL_VLAN, |
986a4f4d | 1821 | VIRTIO_NET_F_GUEST_ANNOUNCE, VIRTIO_NET_F_MQ, |
7e58d5ae | 1822 | VIRTIO_NET_F_CTRL_MAC_ADDR, |
e7428e95 | 1823 | VIRTIO_F_ANY_LAYOUT, |
c45a6816 RR |
1824 | }; |
1825 | ||
22402529 | 1826 | static struct virtio_driver virtio_net_driver = { |
c45a6816 RR |
1827 | .feature_table = features, |
1828 | .feature_table_size = ARRAY_SIZE(features), | |
296f96fc RR |
1829 | .driver.name = KBUILD_MODNAME, |
1830 | .driver.owner = THIS_MODULE, | |
1831 | .id_table = id_table, | |
1832 | .probe = virtnet_probe, | |
8cc085d6 | 1833 | .remove = virtnet_remove, |
9f4d26d0 | 1834 | .config_changed = virtnet_config_changed, |
89107000 | 1835 | #ifdef CONFIG_PM_SLEEP |
0741bcb5 AS |
1836 | .freeze = virtnet_freeze, |
1837 | .restore = virtnet_restore, | |
1838 | #endif | |
296f96fc RR |
1839 | }; |
1840 | ||
b2a17029 | 1841 | module_virtio_driver(virtio_net_driver); |
296f96fc RR |
1842 | |
1843 | MODULE_DEVICE_TABLE(virtio, id_table); | |
1844 | MODULE_DESCRIPTION("Virtio network driver"); | |
1845 | MODULE_LICENSE("GPL"); |