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296f96fc RR |
1 | /* A simple network driver using virtio. |
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 | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | //#define DEBUG | |
20 | #include <linux/netdevice.h> | |
21 | #include <linux/etherdevice.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/virtio.h> | |
24 | #include <linux/virtio_net.h> | |
25 | #include <linux/scatterlist.h> | |
26 | ||
6c0cd7c0 DL |
27 | static int napi_weight = 128; |
28 | module_param(napi_weight, int, 0444); | |
29 | ||
34a48579 RR |
30 | static int csum = 1, gso = 1; |
31 | module_param(csum, bool, 0444); | |
32 | module_param(gso, bool, 0444); | |
33 | ||
296f96fc RR |
34 | /* FIXME: MTU in config. */ |
35 | #define MAX_PACKET_LEN (ETH_HLEN+ETH_DATA_LEN) | |
36 | ||
37 | struct virtnet_info | |
38 | { | |
39 | struct virtio_device *vdev; | |
40 | struct virtqueue *rvq, *svq; | |
41 | struct net_device *dev; | |
42 | struct napi_struct napi; | |
43 | ||
99ffc696 RR |
44 | /* The skb we couldn't send because buffers were full. */ |
45 | struct sk_buff *last_xmit_skb; | |
46 | ||
296f96fc RR |
47 | /* Number of input buffers, and max we've ever had. */ |
48 | unsigned int num, max; | |
49 | ||
50 | /* Receive & send queues. */ | |
51 | struct sk_buff_head recv; | |
52 | struct sk_buff_head send; | |
53 | }; | |
54 | ||
55 | static inline struct virtio_net_hdr *skb_vnet_hdr(struct sk_buff *skb) | |
56 | { | |
57 | return (struct virtio_net_hdr *)skb->cb; | |
58 | } | |
59 | ||
60 | static inline void vnet_hdr_to_sg(struct scatterlist *sg, struct sk_buff *skb) | |
61 | { | |
62 | sg_init_one(sg, skb_vnet_hdr(skb), sizeof(struct virtio_net_hdr)); | |
63 | } | |
64 | ||
2cb9c6ba | 65 | static void skb_xmit_done(struct virtqueue *svq) |
296f96fc | 66 | { |
2cb9c6ba | 67 | struct virtnet_info *vi = svq->vdev->priv; |
296f96fc | 68 | |
2cb9c6ba RR |
69 | /* Suppress further interrupts. */ |
70 | svq->vq_ops->disable_cb(svq); | |
71 | /* We were waiting for more output buffers. */ | |
296f96fc | 72 | netif_wake_queue(vi->dev); |
296f96fc RR |
73 | } |
74 | ||
75 | static void receive_skb(struct net_device *dev, struct sk_buff *skb, | |
76 | unsigned len) | |
77 | { | |
78 | struct virtio_net_hdr *hdr = skb_vnet_hdr(skb); | |
79 | ||
80 | if (unlikely(len < sizeof(struct virtio_net_hdr) + ETH_HLEN)) { | |
81 | pr_debug("%s: short packet %i\n", dev->name, len); | |
82 | dev->stats.rx_length_errors++; | |
83 | goto drop; | |
84 | } | |
85 | len -= sizeof(struct virtio_net_hdr); | |
86 | BUG_ON(len > MAX_PACKET_LEN); | |
87 | ||
88 | skb_trim(skb, len); | |
89 | skb->protocol = eth_type_trans(skb, dev); | |
90 | pr_debug("Receiving skb proto 0x%04x len %i type %i\n", | |
91 | ntohs(skb->protocol), skb->len, skb->pkt_type); | |
92 | dev->stats.rx_bytes += skb->len; | |
93 | dev->stats.rx_packets++; | |
94 | ||
95 | if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { | |
96 | pr_debug("Needs csum!\n"); | |
f35d9d8a | 97 | if (!skb_partial_csum_set(skb,hdr->csum_start,hdr->csum_offset)) |
296f96fc | 98 | goto frame_err; |
296f96fc RR |
99 | } |
100 | ||
101 | if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) { | |
102 | pr_debug("GSO!\n"); | |
34a48579 | 103 | switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { |
296f96fc RR |
104 | case VIRTIO_NET_HDR_GSO_TCPV4: |
105 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; | |
106 | break; | |
296f96fc RR |
107 | case VIRTIO_NET_HDR_GSO_UDP: |
108 | skb_shinfo(skb)->gso_type = SKB_GSO_UDP; | |
109 | break; | |
110 | case VIRTIO_NET_HDR_GSO_TCPV6: | |
111 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; | |
112 | break; | |
113 | default: | |
114 | if (net_ratelimit()) | |
115 | printk(KERN_WARNING "%s: bad gso type %u.\n", | |
116 | dev->name, hdr->gso_type); | |
117 | goto frame_err; | |
118 | } | |
119 | ||
34a48579 RR |
120 | if (hdr->gso_type & VIRTIO_NET_HDR_GSO_ECN) |
121 | skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN; | |
122 | ||
296f96fc RR |
123 | skb_shinfo(skb)->gso_size = hdr->gso_size; |
124 | if (skb_shinfo(skb)->gso_size == 0) { | |
125 | if (net_ratelimit()) | |
126 | printk(KERN_WARNING "%s: zero gso size.\n", | |
127 | dev->name); | |
128 | goto frame_err; | |
129 | } | |
130 | ||
131 | /* Header must be checked, and gso_segs computed. */ | |
132 | skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY; | |
133 | skb_shinfo(skb)->gso_segs = 0; | |
134 | } | |
135 | ||
136 | netif_receive_skb(skb); | |
137 | return; | |
138 | ||
139 | frame_err: | |
140 | dev->stats.rx_frame_errors++; | |
141 | drop: | |
142 | dev_kfree_skb(skb); | |
143 | } | |
144 | ||
145 | static void try_fill_recv(struct virtnet_info *vi) | |
146 | { | |
147 | struct sk_buff *skb; | |
05271685 | 148 | struct scatterlist sg[2+MAX_SKB_FRAGS]; |
296f96fc RR |
149 | int num, err; |
150 | ||
05271685 | 151 | sg_init_table(sg, 2+MAX_SKB_FRAGS); |
296f96fc RR |
152 | for (;;) { |
153 | skb = netdev_alloc_skb(vi->dev, MAX_PACKET_LEN); | |
154 | if (unlikely(!skb)) | |
155 | break; | |
156 | ||
157 | skb_put(skb, MAX_PACKET_LEN); | |
158 | vnet_hdr_to_sg(sg, skb); | |
159 | num = skb_to_sgvec(skb, sg+1, 0, skb->len) + 1; | |
160 | skb_queue_head(&vi->recv, skb); | |
161 | ||
162 | err = vi->rvq->vq_ops->add_buf(vi->rvq, sg, 0, num, skb); | |
163 | if (err) { | |
164 | skb_unlink(skb, &vi->recv); | |
165 | kfree_skb(skb); | |
166 | break; | |
167 | } | |
168 | vi->num++; | |
169 | } | |
170 | if (unlikely(vi->num > vi->max)) | |
171 | vi->max = vi->num; | |
172 | vi->rvq->vq_ops->kick(vi->rvq); | |
173 | } | |
174 | ||
18445c4d | 175 | static void skb_recv_done(struct virtqueue *rvq) |
296f96fc RR |
176 | { |
177 | struct virtnet_info *vi = rvq->vdev->priv; | |
18445c4d RR |
178 | /* Schedule NAPI, Suppress further interrupts if successful. */ |
179 | if (netif_rx_schedule_prep(vi->dev, &vi->napi)) { | |
180 | rvq->vq_ops->disable_cb(rvq); | |
181 | __netif_rx_schedule(vi->dev, &vi->napi); | |
182 | } | |
296f96fc RR |
183 | } |
184 | ||
185 | static int virtnet_poll(struct napi_struct *napi, int budget) | |
186 | { | |
187 | struct virtnet_info *vi = container_of(napi, struct virtnet_info, napi); | |
188 | struct sk_buff *skb = NULL; | |
189 | unsigned int len, received = 0; | |
190 | ||
191 | again: | |
192 | while (received < budget && | |
193 | (skb = vi->rvq->vq_ops->get_buf(vi->rvq, &len)) != NULL) { | |
194 | __skb_unlink(skb, &vi->recv); | |
195 | receive_skb(vi->dev, skb, len); | |
196 | vi->num--; | |
197 | received++; | |
198 | } | |
199 | ||
200 | /* FIXME: If we oom and completely run out of inbufs, we need | |
201 | * to start a timer trying to fill more. */ | |
202 | if (vi->num < vi->max / 2) | |
203 | try_fill_recv(vi); | |
204 | ||
8329d98e RR |
205 | /* Out of packets? */ |
206 | if (received < budget) { | |
296f96fc | 207 | netif_rx_complete(vi->dev, napi); |
18445c4d | 208 | if (unlikely(!vi->rvq->vq_ops->enable_cb(vi->rvq)) |
4265f161 CB |
209 | && napi_schedule_prep(napi)) { |
210 | vi->rvq->vq_ops->disable_cb(vi->rvq); | |
211 | __netif_rx_schedule(vi->dev, napi); | |
296f96fc | 212 | goto again; |
4265f161 | 213 | } |
296f96fc RR |
214 | } |
215 | ||
216 | return received; | |
217 | } | |
218 | ||
219 | static void free_old_xmit_skbs(struct virtnet_info *vi) | |
220 | { | |
221 | struct sk_buff *skb; | |
222 | unsigned int len; | |
223 | ||
224 | while ((skb = vi->svq->vq_ops->get_buf(vi->svq, &len)) != NULL) { | |
225 | pr_debug("Sent skb %p\n", skb); | |
226 | __skb_unlink(skb, &vi->send); | |
655aa31f | 227 | vi->dev->stats.tx_bytes += skb->len; |
296f96fc RR |
228 | vi->dev->stats.tx_packets++; |
229 | kfree_skb(skb); | |
230 | } | |
231 | } | |
232 | ||
99ffc696 | 233 | static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb) |
296f96fc | 234 | { |
99ffc696 | 235 | int num; |
05271685 | 236 | struct scatterlist sg[2+MAX_SKB_FRAGS]; |
296f96fc RR |
237 | struct virtio_net_hdr *hdr; |
238 | const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest; | |
296f96fc | 239 | |
05271685 | 240 | sg_init_table(sg, 2+MAX_SKB_FRAGS); |
4d125de3 | 241 | |
99ffc696 | 242 | pr_debug("%s: xmit %p " MAC_FMT "\n", vi->dev->name, skb, |
21f644f3 DM |
243 | dest[0], dest[1], dest[2], |
244 | dest[3], dest[4], dest[5]); | |
296f96fc | 245 | |
296f96fc RR |
246 | /* Encode metadata header at front. */ |
247 | hdr = skb_vnet_hdr(skb); | |
248 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
249 | hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; | |
250 | hdr->csum_start = skb->csum_start - skb_headroom(skb); | |
251 | hdr->csum_offset = skb->csum_offset; | |
252 | } else { | |
253 | hdr->flags = 0; | |
254 | hdr->csum_offset = hdr->csum_start = 0; | |
255 | } | |
256 | ||
257 | if (skb_is_gso(skb)) { | |
50c8ea80 | 258 | hdr->hdr_len = skb_transport_header(skb) - skb->data; |
296f96fc | 259 | hdr->gso_size = skb_shinfo(skb)->gso_size; |
34a48579 | 260 | if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) |
296f96fc RR |
261 | hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4; |
262 | else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) | |
263 | hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6; | |
264 | else if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
265 | hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP; | |
266 | else | |
267 | BUG(); | |
34a48579 RR |
268 | if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN) |
269 | hdr->gso_type |= VIRTIO_NET_HDR_GSO_ECN; | |
296f96fc RR |
270 | } else { |
271 | hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; | |
50c8ea80 | 272 | hdr->gso_size = hdr->hdr_len = 0; |
296f96fc RR |
273 | } |
274 | ||
275 | vnet_hdr_to_sg(sg, skb); | |
276 | num = skb_to_sgvec(skb, sg+1, 0, skb->len) + 1; | |
99ffc696 RR |
277 | |
278 | return vi->svq->vq_ops->add_buf(vi->svq, sg, num, 0, skb); | |
279 | } | |
280 | ||
281 | static int start_xmit(struct sk_buff *skb, struct net_device *dev) | |
282 | { | |
283 | struct virtnet_info *vi = netdev_priv(dev); | |
2cb9c6ba RR |
284 | |
285 | again: | |
286 | /* Free up any pending old buffers before queueing new ones. */ | |
287 | free_old_xmit_skbs(vi); | |
99ffc696 RR |
288 | |
289 | /* If we has a buffer left over from last time, send it now. */ | |
290 | if (vi->last_xmit_skb) { | |
291 | if (xmit_skb(vi, vi->last_xmit_skb) != 0) { | |
292 | /* Drop this skb: we only queue one. */ | |
293 | vi->dev->stats.tx_dropped++; | |
294 | kfree_skb(skb); | |
295 | goto stop_queue; | |
2cb9c6ba | 296 | } |
99ffc696 RR |
297 | vi->last_xmit_skb = NULL; |
298 | } | |
2cb9c6ba | 299 | |
99ffc696 RR |
300 | /* Put new one in send queue and do transmit */ |
301 | __skb_queue_head(&vi->send, skb); | |
302 | if (xmit_skb(vi, skb) != 0) { | |
303 | vi->last_xmit_skb = skb; | |
304 | goto stop_queue; | |
296f96fc | 305 | } |
99ffc696 | 306 | done: |
296f96fc | 307 | vi->svq->vq_ops->kick(vi->svq); |
99ffc696 RR |
308 | return NETDEV_TX_OK; |
309 | ||
310 | stop_queue: | |
311 | pr_debug("%s: virtio not prepared to send\n", dev->name); | |
312 | netif_stop_queue(dev); | |
313 | ||
314 | /* Activate callback for using skbs: if this returns false it | |
315 | * means some were used in the meantime. */ | |
316 | if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) { | |
317 | vi->svq->vq_ops->disable_cb(vi->svq); | |
318 | netif_start_queue(dev); | |
319 | goto again; | |
320 | } | |
321 | goto done; | |
296f96fc RR |
322 | } |
323 | ||
da74e89d AS |
324 | #ifdef CONFIG_NET_POLL_CONTROLLER |
325 | static void virtnet_netpoll(struct net_device *dev) | |
326 | { | |
327 | struct virtnet_info *vi = netdev_priv(dev); | |
328 | ||
329 | napi_schedule(&vi->napi); | |
330 | } | |
331 | #endif | |
332 | ||
296f96fc RR |
333 | static int virtnet_open(struct net_device *dev) |
334 | { | |
335 | struct virtnet_info *vi = netdev_priv(dev); | |
336 | ||
296f96fc | 337 | napi_enable(&vi->napi); |
a48bd8f6 RR |
338 | |
339 | /* If all buffers were filled by other side before we napi_enabled, we | |
340 | * won't get another interrupt, so process any outstanding packets | |
370076d9 CB |
341 | * now. virtnet_poll wants re-enable the queue, so we disable here. |
342 | * We synchronize against interrupts via NAPI_STATE_SCHED */ | |
343 | if (netif_rx_schedule_prep(dev, &vi->napi)) { | |
344 | vi->rvq->vq_ops->disable_cb(vi->rvq); | |
345 | __netif_rx_schedule(dev, &vi->napi); | |
346 | } | |
296f96fc RR |
347 | return 0; |
348 | } | |
349 | ||
350 | static int virtnet_close(struct net_device *dev) | |
351 | { | |
352 | struct virtnet_info *vi = netdev_priv(dev); | |
296f96fc RR |
353 | |
354 | napi_disable(&vi->napi); | |
355 | ||
296f96fc RR |
356 | return 0; |
357 | } | |
358 | ||
359 | static int virtnet_probe(struct virtio_device *vdev) | |
360 | { | |
361 | int err; | |
296f96fc RR |
362 | struct net_device *dev; |
363 | struct virtnet_info *vi; | |
296f96fc RR |
364 | |
365 | /* Allocate ourselves a network device with room for our info */ | |
366 | dev = alloc_etherdev(sizeof(struct virtnet_info)); | |
367 | if (!dev) | |
368 | return -ENOMEM; | |
369 | ||
370 | /* Set up network device as normal. */ | |
296f96fc RR |
371 | dev->open = virtnet_open; |
372 | dev->stop = virtnet_close; | |
373 | dev->hard_start_xmit = start_xmit; | |
374 | dev->features = NETIF_F_HIGHDMA; | |
da74e89d AS |
375 | #ifdef CONFIG_NET_POLL_CONTROLLER |
376 | dev->poll_controller = virtnet_netpoll; | |
377 | #endif | |
296f96fc RR |
378 | SET_NETDEV_DEV(dev, &vdev->dev); |
379 | ||
380 | /* Do we support "hardware" checksums? */ | |
c45a6816 | 381 | if (csum && virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) { |
296f96fc RR |
382 | /* This opens up the world of extra features. */ |
383 | dev->features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; | |
c45a6816 | 384 | if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) { |
34a48579 RR |
385 | dev->features |= NETIF_F_TSO | NETIF_F_UFO |
386 | | NETIF_F_TSO_ECN | NETIF_F_TSO6; | |
387 | } | |
5539ae96 | 388 | /* Individual feature bits: what can host handle? */ |
c45a6816 | 389 | if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO4)) |
5539ae96 | 390 | dev->features |= NETIF_F_TSO; |
c45a6816 | 391 | if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO6)) |
5539ae96 | 392 | dev->features |= NETIF_F_TSO6; |
c45a6816 | 393 | if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN)) |
5539ae96 | 394 | dev->features |= NETIF_F_TSO_ECN; |
c45a6816 | 395 | if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_UFO)) |
5539ae96 | 396 | dev->features |= NETIF_F_UFO; |
296f96fc RR |
397 | } |
398 | ||
399 | /* Configuration may specify what MAC to use. Otherwise random. */ | |
c45a6816 | 400 | if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) { |
a586d4f6 RR |
401 | vdev->config->get(vdev, |
402 | offsetof(struct virtio_net_config, mac), | |
403 | dev->dev_addr, dev->addr_len); | |
296f96fc RR |
404 | } else |
405 | random_ether_addr(dev->dev_addr); | |
406 | ||
407 | /* Set up our device-specific information */ | |
408 | vi = netdev_priv(dev); | |
6c0cd7c0 | 409 | netif_napi_add(dev, &vi->napi, virtnet_poll, napi_weight); |
296f96fc RR |
410 | vi->dev = dev; |
411 | vi->vdev = vdev; | |
d9d5dcc8 | 412 | vdev->priv = vi; |
296f96fc RR |
413 | |
414 | /* We expect two virtqueues, receive then send. */ | |
a586d4f6 | 415 | vi->rvq = vdev->config->find_vq(vdev, 0, skb_recv_done); |
296f96fc RR |
416 | if (IS_ERR(vi->rvq)) { |
417 | err = PTR_ERR(vi->rvq); | |
418 | goto free; | |
419 | } | |
420 | ||
a586d4f6 | 421 | vi->svq = vdev->config->find_vq(vdev, 1, skb_xmit_done); |
296f96fc RR |
422 | if (IS_ERR(vi->svq)) { |
423 | err = PTR_ERR(vi->svq); | |
424 | goto free_recv; | |
425 | } | |
426 | ||
427 | /* Initialize our empty receive and send queues. */ | |
428 | skb_queue_head_init(&vi->recv); | |
429 | skb_queue_head_init(&vi->send); | |
430 | ||
431 | err = register_netdev(dev); | |
432 | if (err) { | |
433 | pr_debug("virtio_net: registering device failed\n"); | |
434 | goto free_send; | |
435 | } | |
b3369c1f RR |
436 | |
437 | /* Last of all, set up some receive buffers. */ | |
438 | try_fill_recv(vi); | |
439 | ||
440 | /* If we didn't even get one input buffer, we're useless. */ | |
441 | if (vi->num == 0) { | |
442 | err = -ENOMEM; | |
443 | goto unregister; | |
444 | } | |
445 | ||
296f96fc | 446 | pr_debug("virtnet: registered device %s\n", dev->name); |
296f96fc RR |
447 | return 0; |
448 | ||
b3369c1f RR |
449 | unregister: |
450 | unregister_netdev(dev); | |
296f96fc RR |
451 | free_send: |
452 | vdev->config->del_vq(vi->svq); | |
453 | free_recv: | |
454 | vdev->config->del_vq(vi->rvq); | |
455 | free: | |
456 | free_netdev(dev); | |
457 | return err; | |
458 | } | |
459 | ||
460 | static void virtnet_remove(struct virtio_device *vdev) | |
461 | { | |
74b2553f | 462 | struct virtnet_info *vi = vdev->priv; |
b3369c1f RR |
463 | struct sk_buff *skb; |
464 | ||
6e5aa7ef RR |
465 | /* Stop all the virtqueues. */ |
466 | vdev->config->reset(vdev); | |
467 | ||
b3369c1f | 468 | /* Free our skbs in send and recv queues, if any. */ |
b3369c1f RR |
469 | while ((skb = __skb_dequeue(&vi->recv)) != NULL) { |
470 | kfree_skb(skb); | |
471 | vi->num--; | |
472 | } | |
b3369c1f RR |
473 | while ((skb = __skb_dequeue(&vi->send)) != NULL) |
474 | kfree_skb(skb); | |
475 | ||
476 | BUG_ON(vi->num != 0); | |
74b2553f RR |
477 | |
478 | vdev->config->del_vq(vi->svq); | |
479 | vdev->config->del_vq(vi->rvq); | |
480 | unregister_netdev(vi->dev); | |
481 | free_netdev(vi->dev); | |
296f96fc RR |
482 | } |
483 | ||
484 | static struct virtio_device_id id_table[] = { | |
485 | { VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID }, | |
486 | { 0 }, | |
487 | }; | |
488 | ||
c45a6816 RR |
489 | static unsigned int features[] = { |
490 | VIRTIO_NET_F_CSUM, VIRTIO_NET_F_GSO, VIRTIO_NET_F_MAC, | |
491 | VIRTIO_NET_F_HOST_TSO4, VIRTIO_NET_F_HOST_UFO, VIRTIO_NET_F_HOST_TSO6, | |
492 | VIRTIO_NET_F_HOST_ECN, | |
493 | }; | |
494 | ||
296f96fc | 495 | static struct virtio_driver virtio_net = { |
c45a6816 RR |
496 | .feature_table = features, |
497 | .feature_table_size = ARRAY_SIZE(features), | |
296f96fc RR |
498 | .driver.name = KBUILD_MODNAME, |
499 | .driver.owner = THIS_MODULE, | |
500 | .id_table = id_table, | |
501 | .probe = virtnet_probe, | |
502 | .remove = __devexit_p(virtnet_remove), | |
503 | }; | |
504 | ||
505 | static int __init init(void) | |
506 | { | |
507 | return register_virtio_driver(&virtio_net); | |
508 | } | |
509 | ||
510 | static void __exit fini(void) | |
511 | { | |
512 | unregister_virtio_driver(&virtio_net); | |
513 | } | |
514 | module_init(init); | |
515 | module_exit(fini); | |
516 | ||
517 | MODULE_DEVICE_TABLE(virtio, id_table); | |
518 | MODULE_DESCRIPTION("Virtio network driver"); | |
519 | MODULE_LICENSE("GPL"); |