Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 1 | /* A network driver using virtio. |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 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> |
Herbert Xu | a9ea3fc | 2008-04-18 11:21:42 +0800 | [diff] [blame] | 22 | #include <linux/ethtool.h> |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 23 | #include <linux/module.h> |
| 24 | #include <linux/virtio.h> |
| 25 | #include <linux/virtio_net.h> |
| 26 | #include <linux/scatterlist.h> |
Alex Williamson | e918085a | 2009-01-25 18:06:26 -0800 | [diff] [blame] | 27 | #include <linux/if_vlan.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 29 | |
Dor Laor | 6c0cd7c | 2007-12-16 15:19:43 +0200 | [diff] [blame] | 30 | static int napi_weight = 128; |
| 31 | module_param(napi_weight, int, 0444); |
| 32 | |
Rusty Russell | 34a4857 | 2008-02-04 23:50:02 -0500 | [diff] [blame] | 33 | static int csum = 1, gso = 1; |
| 34 | module_param(csum, bool, 0444); |
| 35 | module_param(gso, bool, 0444); |
| 36 | |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 37 | /* FIXME: MTU in config. */ |
Alex Williamson | e918085a | 2009-01-25 18:06:26 -0800 | [diff] [blame] | 38 | #define MAX_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN) |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 39 | #define GOOD_COPY_LEN 128 |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 40 | |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 41 | #define VIRTNET_SEND_COMMAND_SG_MAX 2 |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 42 | |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 43 | struct virtnet_stats { |
| 44 | struct u64_stats_sync syncp; |
| 45 | u64 tx_bytes; |
| 46 | u64 tx_packets; |
| 47 | |
| 48 | u64 rx_bytes; |
| 49 | u64 rx_packets; |
| 50 | }; |
| 51 | |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 52 | struct virtnet_info { |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 53 | struct virtio_device *vdev; |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 54 | struct virtqueue *rvq, *svq, *cvq; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 55 | struct net_device *dev; |
| 56 | struct napi_struct napi; |
Mark McLoughlin | 9f4d26d | 2009-01-19 17:09:49 -0800 | [diff] [blame] | 57 | unsigned int status; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 58 | |
| 59 | /* Number of input buffers, and max we've ever had. */ |
| 60 | unsigned int num, max; |
| 61 | |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 62 | /* I like... big packets and I cannot lie! */ |
| 63 | bool big_packets; |
| 64 | |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 65 | /* Host will merge rx buffers for big packets (shake it! shake it!) */ |
| 66 | bool mergeable_rx_bufs; |
| 67 | |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 68 | /* Active statistics */ |
| 69 | struct virtnet_stats __percpu *stats; |
| 70 | |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 71 | /* Work struct for refilling if we run low on memory. */ |
| 72 | struct delayed_work refill; |
| 73 | |
Rusty Russell | fb6813f | 2008-07-25 12:06:01 -0500 | [diff] [blame] | 74 | /* Chain pages by the private ptr. */ |
| 75 | struct page *pages; |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 76 | |
| 77 | /* fragments + linear part + virtio header */ |
| 78 | struct scatterlist rx_sg[MAX_SKB_FRAGS + 2]; |
| 79 | struct scatterlist tx_sg[MAX_SKB_FRAGS + 2]; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 80 | }; |
| 81 | |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 82 | struct skb_vnet_hdr { |
| 83 | union { |
| 84 | struct virtio_net_hdr hdr; |
| 85 | struct virtio_net_hdr_mrg_rxbuf mhdr; |
| 86 | }; |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 87 | unsigned int num_sg; |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 88 | }; |
| 89 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 90 | struct padded_vnet_hdr { |
| 91 | struct virtio_net_hdr hdr; |
| 92 | /* |
| 93 | * virtio_net_hdr should be in a separated sg buffer because of a |
| 94 | * QEMU bug, and data sg buffer shares same page with this header sg. |
| 95 | * This padding makes next sg 16 byte aligned after virtio_net_hdr. |
| 96 | */ |
| 97 | char padding[6]; |
| 98 | }; |
| 99 | |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 100 | static inline struct skb_vnet_hdr *skb_vnet_hdr(struct sk_buff *skb) |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 101 | { |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 102 | return (struct skb_vnet_hdr *)skb->cb; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 103 | } |
| 104 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 105 | /* |
| 106 | * private is used to chain pages for big packets, put the whole |
| 107 | * most recent used list in the beginning for reuse |
| 108 | */ |
| 109 | static void give_pages(struct virtnet_info *vi, struct page *page) |
Rusty Russell | fb6813f | 2008-07-25 12:06:01 -0500 | [diff] [blame] | 110 | { |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 111 | struct page *end; |
| 112 | |
| 113 | /* Find end of list, sew whole thing into vi->pages. */ |
| 114 | for (end = page; end->private; end = (struct page *)end->private); |
| 115 | end->private = (unsigned long)vi->pages; |
Rusty Russell | fb6813f | 2008-07-25 12:06:01 -0500 | [diff] [blame] | 116 | vi->pages = page; |
| 117 | } |
| 118 | |
| 119 | static struct page *get_a_page(struct virtnet_info *vi, gfp_t gfp_mask) |
| 120 | { |
| 121 | struct page *p = vi->pages; |
| 122 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 123 | if (p) { |
Rusty Russell | fb6813f | 2008-07-25 12:06:01 -0500 | [diff] [blame] | 124 | vi->pages = (struct page *)p->private; |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 125 | /* clear private here, it is used to chain pages */ |
| 126 | p->private = 0; |
| 127 | } else |
Rusty Russell | fb6813f | 2008-07-25 12:06:01 -0500 | [diff] [blame] | 128 | p = alloc_page(gfp_mask); |
| 129 | return p; |
| 130 | } |
| 131 | |
Rusty Russell | 2cb9c6b | 2008-02-04 23:50:07 -0500 | [diff] [blame] | 132 | static void skb_xmit_done(struct virtqueue *svq) |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 133 | { |
Rusty Russell | 2cb9c6b | 2008-02-04 23:50:07 -0500 | [diff] [blame] | 134 | struct virtnet_info *vi = svq->vdev->priv; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 135 | |
Rusty Russell | 2cb9c6b | 2008-02-04 23:50:07 -0500 | [diff] [blame] | 136 | /* Suppress further interrupts. */ |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 137 | virtqueue_disable_cb(svq); |
Rusty Russell | 11a3a15 | 2008-05-26 17:48:13 +1000 | [diff] [blame] | 138 | |
Rusty Russell | 363f151 | 2008-06-08 20:51:55 +1000 | [diff] [blame] | 139 | /* We were probably waiting for more output buffers. */ |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 140 | netif_wake_queue(vi->dev); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 141 | } |
| 142 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 143 | static void set_skb_frag(struct sk_buff *skb, struct page *page, |
| 144 | unsigned int offset, unsigned int *len) |
| 145 | { |
| 146 | int i = skb_shinfo(skb)->nr_frags; |
| 147 | skb_frag_t *f; |
| 148 | |
| 149 | f = &skb_shinfo(skb)->frags[i]; |
| 150 | f->size = min((unsigned)PAGE_SIZE - offset, *len); |
| 151 | f->page_offset = offset; |
| 152 | f->page = page; |
| 153 | |
| 154 | skb->data_len += f->size; |
| 155 | skb->len += f->size; |
| 156 | skb_shinfo(skb)->nr_frags++; |
| 157 | *len -= f->size; |
| 158 | } |
| 159 | |
| 160 | static struct sk_buff *page_to_skb(struct virtnet_info *vi, |
| 161 | struct page *page, unsigned int len) |
| 162 | { |
| 163 | struct sk_buff *skb; |
| 164 | struct skb_vnet_hdr *hdr; |
| 165 | unsigned int copy, hdr_len, offset; |
| 166 | char *p; |
| 167 | |
| 168 | p = page_address(page); |
| 169 | |
| 170 | /* copy small packet so we can reuse these pages for small data */ |
| 171 | skb = netdev_alloc_skb_ip_align(vi->dev, GOOD_COPY_LEN); |
| 172 | if (unlikely(!skb)) |
| 173 | return NULL; |
| 174 | |
| 175 | hdr = skb_vnet_hdr(skb); |
| 176 | |
| 177 | if (vi->mergeable_rx_bufs) { |
| 178 | hdr_len = sizeof hdr->mhdr; |
| 179 | offset = hdr_len; |
| 180 | } else { |
| 181 | hdr_len = sizeof hdr->hdr; |
| 182 | offset = sizeof(struct padded_vnet_hdr); |
| 183 | } |
| 184 | |
| 185 | memcpy(hdr, p, hdr_len); |
| 186 | |
| 187 | len -= hdr_len; |
| 188 | p += offset; |
| 189 | |
| 190 | copy = len; |
| 191 | if (copy > skb_tailroom(skb)) |
| 192 | copy = skb_tailroom(skb); |
| 193 | memcpy(skb_put(skb, copy), p, copy); |
| 194 | |
| 195 | len -= copy; |
| 196 | offset += copy; |
| 197 | |
| 198 | while (len) { |
| 199 | set_skb_frag(skb, page, offset, &len); |
| 200 | page = (struct page *)page->private; |
| 201 | offset = 0; |
| 202 | } |
| 203 | |
| 204 | if (page) |
| 205 | give_pages(vi, page); |
| 206 | |
| 207 | return skb; |
| 208 | } |
| 209 | |
| 210 | static int receive_mergeable(struct virtnet_info *vi, struct sk_buff *skb) |
| 211 | { |
| 212 | struct skb_vnet_hdr *hdr = skb_vnet_hdr(skb); |
| 213 | struct page *page; |
| 214 | int num_buf, i, len; |
| 215 | |
| 216 | num_buf = hdr->mhdr.num_buffers; |
| 217 | while (--num_buf) { |
| 218 | i = skb_shinfo(skb)->nr_frags; |
| 219 | if (i >= MAX_SKB_FRAGS) { |
| 220 | pr_debug("%s: packet too long\n", skb->dev->name); |
| 221 | skb->dev->stats.rx_length_errors++; |
| 222 | return -EINVAL; |
| 223 | } |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 224 | page = virtqueue_get_buf(vi->rvq, &len); |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 225 | if (!page) { |
| 226 | pr_debug("%s: rx error: %d buffers missing\n", |
| 227 | skb->dev->name, hdr->mhdr.num_buffers); |
| 228 | skb->dev->stats.rx_length_errors++; |
| 229 | return -EINVAL; |
| 230 | } |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 231 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 232 | if (len > PAGE_SIZE) |
| 233 | len = PAGE_SIZE; |
| 234 | |
| 235 | set_skb_frag(skb, page, 0, &len); |
| 236 | |
| 237 | --vi->num; |
| 238 | } |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | static void receive_buf(struct net_device *dev, void *buf, unsigned int len) |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 243 | { |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 244 | struct virtnet_info *vi = netdev_priv(dev); |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 245 | struct virtnet_stats __percpu *stats = this_cpu_ptr(vi->stats); |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 246 | struct sk_buff *skb; |
| 247 | struct page *page; |
| 248 | struct skb_vnet_hdr *hdr; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 249 | |
| 250 | if (unlikely(len < sizeof(struct virtio_net_hdr) + ETH_HLEN)) { |
| 251 | pr_debug("%s: short packet %i\n", dev->name, len); |
| 252 | dev->stats.rx_length_errors++; |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 253 | if (vi->mergeable_rx_bufs || vi->big_packets) |
| 254 | give_pages(vi, buf); |
| 255 | else |
| 256 | dev_kfree_skb(buf); |
| 257 | return; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 258 | } |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 259 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 260 | if (!vi->mergeable_rx_bufs && !vi->big_packets) { |
| 261 | skb = buf; |
| 262 | len -= sizeof(struct virtio_net_hdr); |
| 263 | skb_trim(skb, len); |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 264 | } else { |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 265 | page = buf; |
| 266 | skb = page_to_skb(vi, page, len); |
| 267 | if (unlikely(!skb)) { |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 268 | dev->stats.rx_dropped++; |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 269 | give_pages(vi, page); |
| 270 | return; |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 271 | } |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 272 | if (vi->mergeable_rx_bufs) |
| 273 | if (receive_mergeable(vi, skb)) { |
| 274 | dev_kfree_skb(skb); |
| 275 | return; |
| 276 | } |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 277 | } |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 278 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 279 | hdr = skb_vnet_hdr(skb); |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 280 | skb->truesize += skb->data_len; |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 281 | |
| 282 | u64_stats_update_begin(&stats->syncp); |
| 283 | stats->rx_bytes += skb->len; |
| 284 | stats->rx_packets++; |
| 285 | u64_stats_update_end(&stats->syncp); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 286 | |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 287 | if (hdr->hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 288 | pr_debug("Needs csum!\n"); |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 289 | if (!skb_partial_csum_set(skb, |
| 290 | hdr->hdr.csum_start, |
| 291 | hdr->hdr.csum_offset)) |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 292 | goto frame_err; |
Jason Wang | 10a8d94 | 2011-06-10 00:56:17 +0000 | [diff] [blame] | 293 | } else if (hdr->hdr.flags & VIRTIO_NET_HDR_F_DATA_VALID) { |
| 294 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 295 | } |
| 296 | |
Mark McLoughlin | 23cde76 | 2008-06-08 20:49:00 +1000 | [diff] [blame] | 297 | skb->protocol = eth_type_trans(skb, dev); |
| 298 | pr_debug("Receiving skb proto 0x%04x len %i type %i\n", |
| 299 | ntohs(skb->protocol), skb->len, skb->pkt_type); |
| 300 | |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 301 | if (hdr->hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) { |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 302 | pr_debug("GSO!\n"); |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 303 | switch (hdr->hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 304 | case VIRTIO_NET_HDR_GSO_TCPV4: |
| 305 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; |
| 306 | break; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 307 | case VIRTIO_NET_HDR_GSO_UDP: |
| 308 | skb_shinfo(skb)->gso_type = SKB_GSO_UDP; |
| 309 | break; |
| 310 | case VIRTIO_NET_HDR_GSO_TCPV6: |
| 311 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; |
| 312 | break; |
| 313 | default: |
| 314 | if (net_ratelimit()) |
| 315 | printk(KERN_WARNING "%s: bad gso type %u.\n", |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 316 | dev->name, hdr->hdr.gso_type); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 317 | goto frame_err; |
| 318 | } |
| 319 | |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 320 | if (hdr->hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN) |
Rusty Russell | 34a4857 | 2008-02-04 23:50:02 -0500 | [diff] [blame] | 321 | skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN; |
| 322 | |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 323 | skb_shinfo(skb)->gso_size = hdr->hdr.gso_size; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 324 | if (skb_shinfo(skb)->gso_size == 0) { |
| 325 | if (net_ratelimit()) |
| 326 | printk(KERN_WARNING "%s: zero gso size.\n", |
| 327 | dev->name); |
| 328 | goto frame_err; |
| 329 | } |
| 330 | |
| 331 | /* Header must be checked, and gso_segs computed. */ |
| 332 | skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY; |
| 333 | skb_shinfo(skb)->gso_segs = 0; |
| 334 | } |
| 335 | |
| 336 | netif_receive_skb(skb); |
| 337 | return; |
| 338 | |
| 339 | frame_err: |
| 340 | dev->stats.rx_frame_errors++; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 341 | dev_kfree_skb(skb); |
| 342 | } |
| 343 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 344 | static int add_recvbuf_small(struct virtnet_info *vi, gfp_t gfp) |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 345 | { |
| 346 | struct sk_buff *skb; |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 347 | struct skb_vnet_hdr *hdr; |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 348 | int err; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 349 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 350 | skb = netdev_alloc_skb_ip_align(vi->dev, MAX_PACKET_LEN); |
| 351 | if (unlikely(!skb)) |
| 352 | return -ENOMEM; |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 353 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 354 | skb_put(skb, MAX_PACKET_LEN); |
| 355 | |
| 356 | hdr = skb_vnet_hdr(skb); |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 357 | sg_set_buf(vi->rx_sg, &hdr->hdr, sizeof hdr->hdr); |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 358 | |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 359 | skb_to_sgvec(skb, vi->rx_sg + 1, 0, skb->len); |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 360 | |
Michael S. Tsirkin | aa989f5 | 2010-05-31 01:10:01 +0000 | [diff] [blame] | 361 | err = virtqueue_add_buf_gfp(vi->rvq, vi->rx_sg, 0, 2, skb, gfp); |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 362 | if (err < 0) |
| 363 | dev_kfree_skb(skb); |
| 364 | |
| 365 | return err; |
| 366 | } |
| 367 | |
| 368 | static int add_recvbuf_big(struct virtnet_info *vi, gfp_t gfp) |
| 369 | { |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 370 | struct page *first, *list = NULL; |
| 371 | char *p; |
| 372 | int i, err, offset; |
| 373 | |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 374 | /* page in vi->rx_sg[MAX_SKB_FRAGS + 1] is list tail */ |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 375 | for (i = MAX_SKB_FRAGS + 1; i > 1; --i) { |
| 376 | first = get_a_page(vi, gfp); |
| 377 | if (!first) { |
| 378 | if (list) |
| 379 | give_pages(vi, list); |
| 380 | return -ENOMEM; |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 381 | } |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 382 | sg_set_buf(&vi->rx_sg[i], page_address(first), PAGE_SIZE); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 383 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 384 | /* chain new page in list head to match sg */ |
| 385 | first->private = (unsigned long)list; |
| 386 | list = first; |
| 387 | } |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 388 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 389 | first = get_a_page(vi, gfp); |
| 390 | if (!first) { |
| 391 | give_pages(vi, list); |
| 392 | return -ENOMEM; |
| 393 | } |
| 394 | p = page_address(first); |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 395 | |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 396 | /* vi->rx_sg[0], vi->rx_sg[1] share the same page */ |
| 397 | /* a separated vi->rx_sg[0] for virtio_net_hdr only due to QEMU bug */ |
| 398 | sg_set_buf(&vi->rx_sg[0], p, sizeof(struct virtio_net_hdr)); |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 399 | |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 400 | /* vi->rx_sg[1] for data packet, from offset */ |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 401 | offset = sizeof(struct padded_vnet_hdr); |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 402 | sg_set_buf(&vi->rx_sg[1], p + offset, PAGE_SIZE - offset); |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 403 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 404 | /* chain first in list head */ |
| 405 | first->private = (unsigned long)list; |
Michael S. Tsirkin | aa989f5 | 2010-05-31 01:10:01 +0000 | [diff] [blame] | 406 | err = virtqueue_add_buf_gfp(vi->rvq, vi->rx_sg, 0, MAX_SKB_FRAGS + 2, |
| 407 | first, gfp); |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 408 | if (err < 0) |
| 409 | give_pages(vi, first); |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 410 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 411 | return err; |
| 412 | } |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 413 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 414 | static int add_recvbuf_mergeable(struct virtnet_info *vi, gfp_t gfp) |
| 415 | { |
| 416 | struct page *page; |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 417 | int err; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 418 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 419 | page = get_a_page(vi, gfp); |
| 420 | if (!page) |
| 421 | return -ENOMEM; |
| 422 | |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 423 | sg_init_one(vi->rx_sg, page_address(page), PAGE_SIZE); |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 424 | |
Michael S. Tsirkin | aa989f5 | 2010-05-31 01:10:01 +0000 | [diff] [blame] | 425 | err = virtqueue_add_buf_gfp(vi->rvq, vi->rx_sg, 0, 1, page, gfp); |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 426 | if (err < 0) |
| 427 | give_pages(vi, page); |
| 428 | |
| 429 | return err; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 430 | } |
| 431 | |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 432 | /* Returns false if we couldn't fill entirely (OOM). */ |
| 433 | static bool try_fill_recv(struct virtnet_info *vi, gfp_t gfp) |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 434 | { |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 435 | int err; |
Michael S. Tsirkin | 1788f495 | 2010-07-02 16:32:55 +0000 | [diff] [blame] | 436 | bool oom; |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 437 | |
Amit Shah | 0aea51c | 2009-08-26 14:58:28 +0530 | [diff] [blame] | 438 | do { |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 439 | if (vi->mergeable_rx_bufs) |
| 440 | err = add_recvbuf_mergeable(vi, gfp); |
| 441 | else if (vi->big_packets) |
| 442 | err = add_recvbuf_big(vi, gfp); |
| 443 | else |
| 444 | err = add_recvbuf_small(vi, gfp); |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 445 | |
Michael S. Tsirkin | 1788f495 | 2010-07-02 16:32:55 +0000 | [diff] [blame] | 446 | oom = err == -ENOMEM; |
| 447 | if (err < 0) |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 448 | break; |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 449 | ++vi->num; |
Amit Shah | 0aea51c | 2009-08-26 14:58:28 +0530 | [diff] [blame] | 450 | } while (err > 0); |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 451 | if (unlikely(vi->num > vi->max)) |
| 452 | vi->max = vi->num; |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 453 | virtqueue_kick(vi->rvq); |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 454 | return !oom; |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 455 | } |
| 456 | |
Rusty Russell | 18445c4 | 2008-02-04 23:49:57 -0500 | [diff] [blame] | 457 | static void skb_recv_done(struct virtqueue *rvq) |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 458 | { |
| 459 | struct virtnet_info *vi = rvq->vdev->priv; |
Rusty Russell | 18445c4 | 2008-02-04 23:49:57 -0500 | [diff] [blame] | 460 | /* Schedule NAPI, Suppress further interrupts if successful. */ |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 461 | if (napi_schedule_prep(&vi->napi)) { |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 462 | virtqueue_disable_cb(rvq); |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 463 | __napi_schedule(&vi->napi); |
Rusty Russell | 18445c4 | 2008-02-04 23:49:57 -0500 | [diff] [blame] | 464 | } |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 465 | } |
| 466 | |
Bruce Rogers | 3e9d08e | 2011-02-10 11:03:31 -0800 | [diff] [blame] | 467 | static void virtnet_napi_enable(struct virtnet_info *vi) |
| 468 | { |
| 469 | napi_enable(&vi->napi); |
| 470 | |
| 471 | /* If all buffers were filled by other side before we napi_enabled, we |
| 472 | * won't get another interrupt, so process any outstanding packets |
| 473 | * now. virtnet_poll wants re-enable the queue, so we disable here. |
| 474 | * We synchronize against interrupts via NAPI_STATE_SCHED */ |
| 475 | if (napi_schedule_prep(&vi->napi)) { |
| 476 | virtqueue_disable_cb(vi->rvq); |
| 477 | __napi_schedule(&vi->napi); |
| 478 | } |
| 479 | } |
| 480 | |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 481 | static void refill_work(struct work_struct *work) |
| 482 | { |
| 483 | struct virtnet_info *vi; |
| 484 | bool still_empty; |
| 485 | |
| 486 | vi = container_of(work, struct virtnet_info, refill.work); |
| 487 | napi_disable(&vi->napi); |
Herbert Xu | 39d3215 | 2010-01-25 15:51:01 -0800 | [diff] [blame] | 488 | still_empty = !try_fill_recv(vi, GFP_KERNEL); |
Bruce Rogers | 3e9d08e | 2011-02-10 11:03:31 -0800 | [diff] [blame] | 489 | virtnet_napi_enable(vi); |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 490 | |
| 491 | /* In theory, this can happen: if we don't get any buffers in |
| 492 | * we will *never* try to fill again. */ |
| 493 | if (still_empty) |
| 494 | schedule_delayed_work(&vi->refill, HZ/2); |
| 495 | } |
| 496 | |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 497 | static int virtnet_poll(struct napi_struct *napi, int budget) |
| 498 | { |
| 499 | struct virtnet_info *vi = container_of(napi, struct virtnet_info, napi); |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 500 | void *buf; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 501 | unsigned int len, received = 0; |
| 502 | |
| 503 | again: |
| 504 | while (received < budget && |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 505 | (buf = virtqueue_get_buf(vi->rvq, &len)) != NULL) { |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 506 | receive_buf(vi->dev, buf, len); |
| 507 | --vi->num; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 508 | received++; |
| 509 | } |
| 510 | |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 511 | if (vi->num < vi->max / 2) { |
| 512 | if (!try_fill_recv(vi, GFP_ATOMIC)) |
| 513 | schedule_delayed_work(&vi->refill, 0); |
| 514 | } |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 515 | |
Rusty Russell | 8329d98 | 2007-11-19 11:20:43 -0500 | [diff] [blame] | 516 | /* Out of packets? */ |
| 517 | if (received < budget) { |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 518 | napi_complete(napi); |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 519 | if (unlikely(!virtqueue_enable_cb(vi->rvq)) && |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 520 | napi_schedule_prep(napi)) { |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 521 | virtqueue_disable_cb(vi->rvq); |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 522 | __napi_schedule(napi); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 523 | goto again; |
Christian Borntraeger | 4265f16 | 2008-03-14 14:17:05 +0100 | [diff] [blame] | 524 | } |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | return received; |
| 528 | } |
| 529 | |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 530 | static unsigned int free_old_xmit_skbs(struct virtnet_info *vi) |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 531 | { |
| 532 | struct sk_buff *skb; |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 533 | unsigned int len, tot_sgs = 0; |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 534 | struct virtnet_stats __percpu *stats = this_cpu_ptr(vi->stats); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 535 | |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 536 | while ((skb = virtqueue_get_buf(vi->svq, &len)) != NULL) { |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 537 | pr_debug("Sent skb %p\n", skb); |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 538 | |
| 539 | u64_stats_update_begin(&stats->syncp); |
| 540 | stats->tx_bytes += skb->len; |
| 541 | stats->tx_packets++; |
| 542 | u64_stats_update_end(&stats->syncp); |
| 543 | |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 544 | tot_sgs += skb_vnet_hdr(skb)->num_sg; |
Eric Dumazet | ed79bab | 2009-10-14 14:36:43 +0000 | [diff] [blame] | 545 | dev_kfree_skb_any(skb); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 546 | } |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 547 | return tot_sgs; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 548 | } |
| 549 | |
Rusty Russell | 99ffc69 | 2008-05-02 21:50:46 -0500 | [diff] [blame] | 550 | static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb) |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 551 | { |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 552 | struct skb_vnet_hdr *hdr = skb_vnet_hdr(skb); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 553 | const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 554 | |
Johannes Berg | e174961 | 2008-10-27 15:59:26 -0700 | [diff] [blame] | 555 | pr_debug("%s: xmit %p %pM\n", vi->dev->name, skb, dest); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 556 | |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 557 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 558 | hdr->hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; |
Michał Mirosław | 55508d6 | 2010-12-14 15:24:08 +0000 | [diff] [blame] | 559 | hdr->hdr.csum_start = skb_checksum_start_offset(skb); |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 560 | hdr->hdr.csum_offset = skb->csum_offset; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 561 | } else { |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 562 | hdr->hdr.flags = 0; |
| 563 | hdr->hdr.csum_offset = hdr->hdr.csum_start = 0; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 564 | } |
| 565 | |
| 566 | if (skb_is_gso(skb)) { |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 567 | hdr->hdr.hdr_len = skb_headlen(skb); |
| 568 | hdr->hdr.gso_size = skb_shinfo(skb)->gso_size; |
Rusty Russell | 34a4857 | 2008-02-04 23:50:02 -0500 | [diff] [blame] | 569 | if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 570 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 571 | else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 572 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 573 | else if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 574 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 575 | else |
| 576 | BUG(); |
Rusty Russell | 34a4857 | 2008-02-04 23:50:02 -0500 | [diff] [blame] | 577 | if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN) |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 578 | hdr->hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 579 | } else { |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 580 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE; |
| 581 | hdr->hdr.gso_size = hdr->hdr.hdr_len = 0; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 582 | } |
| 583 | |
Rusty Russell | b3f2469 | 2009-09-24 09:59:19 -0600 | [diff] [blame] | 584 | hdr->mhdr.num_buffers = 0; |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 585 | |
| 586 | /* Encode metadata header at front. */ |
| 587 | if (vi->mergeable_rx_bufs) |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 588 | sg_set_buf(vi->tx_sg, &hdr->mhdr, sizeof hdr->mhdr); |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 589 | else |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 590 | sg_set_buf(vi->tx_sg, &hdr->hdr, sizeof hdr->hdr); |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 591 | |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 592 | hdr->num_sg = skb_to_sgvec(skb, vi->tx_sg + 1, 0, skb->len) + 1; |
Linus Torvalds | 1756ac3 | 2010-05-21 17:22:52 -0700 | [diff] [blame] | 593 | return virtqueue_add_buf(vi->svq, vi->tx_sg, hdr->num_sg, |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 594 | 0, skb); |
Rusty Russell | 11a3a15 | 2008-05-26 17:48:13 +1000 | [diff] [blame] | 595 | } |
| 596 | |
Stephen Hemminger | 424efe9 | 2009-08-31 19:50:51 +0000 | [diff] [blame] | 597 | static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev) |
Rusty Russell | 99ffc69 | 2008-05-02 21:50:46 -0500 | [diff] [blame] | 598 | { |
| 599 | struct virtnet_info *vi = netdev_priv(dev); |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 600 | int capacity; |
Rusty Russell | 2cb9c6b | 2008-02-04 23:50:07 -0500 | [diff] [blame] | 601 | |
Rusty Russell | 2cb9c6b | 2008-02-04 23:50:07 -0500 | [diff] [blame] | 602 | /* Free up any pending old buffers before queueing new ones. */ |
| 603 | free_old_xmit_skbs(vi); |
Rusty Russell | 2cb9c6b | 2008-02-04 23:50:07 -0500 | [diff] [blame] | 604 | |
Michael S. Tsirkin | 03f191b | 2009-10-28 04:03:38 -0700 | [diff] [blame] | 605 | /* Try to transmit */ |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 606 | capacity = xmit_skb(vi, skb); |
| 607 | |
| 608 | /* This can happen with OOM and indirect buffers. */ |
| 609 | if (unlikely(capacity < 0)) { |
Rusty Russell | 58eba97 | 2010-07-02 16:34:01 +0000 | [diff] [blame] | 610 | if (net_ratelimit()) { |
| 611 | if (likely(capacity == -ENOMEM)) { |
| 612 | dev_warn(&dev->dev, |
| 613 | "TX queue failure: out of memory\n"); |
| 614 | } else { |
| 615 | dev->stats.tx_fifo_errors++; |
| 616 | dev_warn(&dev->dev, |
| 617 | "Unexpected TX queue failure: %d\n", |
| 618 | capacity); |
| 619 | } |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 620 | } |
Rusty Russell | 58eba97 | 2010-07-02 16:34:01 +0000 | [diff] [blame] | 621 | dev->stats.tx_dropped++; |
| 622 | kfree_skb(skb); |
| 623 | return NETDEV_TX_OK; |
Rusty Russell | 99ffc69 | 2008-05-02 21:50:46 -0500 | [diff] [blame] | 624 | } |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 625 | virtqueue_kick(vi->svq); |
Michael S. Tsirkin | 03f191b | 2009-10-28 04:03:38 -0700 | [diff] [blame] | 626 | |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 627 | /* Don't wait up for transmitted skbs to be freed. */ |
| 628 | skb_orphan(skb); |
| 629 | nf_reset(skb); |
Rusty Russell | 99ffc69 | 2008-05-02 21:50:46 -0500 | [diff] [blame] | 630 | |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 631 | /* Apparently nice girls don't return TX_BUSY; stop the queue |
| 632 | * before it gets out of hand. Naturally, this wastes entries. */ |
| 633 | if (capacity < 2+MAX_SKB_FRAGS) { |
| 634 | netif_stop_queue(dev); |
Michael S. Tsirkin | 7a66f78 | 2011-05-20 02:11:23 +0300 | [diff] [blame] | 635 | if (unlikely(!virtqueue_enable_cb_delayed(vi->svq))) { |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 636 | /* More just got used, free them then recheck. */ |
| 637 | capacity += free_old_xmit_skbs(vi); |
| 638 | if (capacity >= 2+MAX_SKB_FRAGS) { |
| 639 | netif_start_queue(dev); |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 640 | virtqueue_disable_cb(vi->svq); |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 641 | } |
| 642 | } |
Rusty Russell | 99ffc69 | 2008-05-02 21:50:46 -0500 | [diff] [blame] | 643 | } |
Rusty Russell | 48925e3 | 2009-09-24 09:59:20 -0600 | [diff] [blame] | 644 | |
| 645 | return NETDEV_TX_OK; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 646 | } |
| 647 | |
Alex Williamson | 9c46f6d | 2009-02-04 16:36:34 -0800 | [diff] [blame] | 648 | static int virtnet_set_mac_address(struct net_device *dev, void *p) |
| 649 | { |
| 650 | struct virtnet_info *vi = netdev_priv(dev); |
| 651 | struct virtio_device *vdev = vi->vdev; |
| 652 | int ret; |
| 653 | |
| 654 | ret = eth_mac_addr(dev, p); |
| 655 | if (ret) |
| 656 | return ret; |
| 657 | |
Alex Williamson | 62994b2 | 2009-04-04 16:40:19 -0700 | [diff] [blame] | 658 | if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) |
| 659 | vdev->config->set(vdev, offsetof(struct virtio_net_config, mac), |
| 660 | dev->dev_addr, dev->addr_len); |
Alex Williamson | 9c46f6d | 2009-02-04 16:36:34 -0800 | [diff] [blame] | 661 | |
| 662 | return 0; |
| 663 | } |
| 664 | |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 665 | static struct rtnl_link_stats64 *virtnet_stats(struct net_device *dev, |
| 666 | struct rtnl_link_stats64 *tot) |
| 667 | { |
| 668 | struct virtnet_info *vi = netdev_priv(dev); |
| 669 | int cpu; |
| 670 | unsigned int start; |
| 671 | |
| 672 | for_each_possible_cpu(cpu) { |
| 673 | struct virtnet_stats __percpu *stats |
| 674 | = per_cpu_ptr(vi->stats, cpu); |
| 675 | u64 tpackets, tbytes, rpackets, rbytes; |
| 676 | |
| 677 | do { |
| 678 | start = u64_stats_fetch_begin(&stats->syncp); |
| 679 | tpackets = stats->tx_packets; |
| 680 | tbytes = stats->tx_bytes; |
| 681 | rpackets = stats->rx_packets; |
| 682 | rbytes = stats->rx_bytes; |
| 683 | } while (u64_stats_fetch_retry(&stats->syncp, start)); |
| 684 | |
| 685 | tot->rx_packets += rpackets; |
| 686 | tot->tx_packets += tpackets; |
| 687 | tot->rx_bytes += rbytes; |
| 688 | tot->tx_bytes += tbytes; |
| 689 | } |
| 690 | |
| 691 | tot->tx_dropped = dev->stats.tx_dropped; |
| 692 | tot->rx_dropped = dev->stats.rx_dropped; |
| 693 | tot->rx_length_errors = dev->stats.rx_length_errors; |
| 694 | tot->rx_frame_errors = dev->stats.rx_frame_errors; |
| 695 | |
| 696 | return tot; |
| 697 | } |
| 698 | |
Amit Shah | da74e89 | 2008-02-29 16:24:50 +0530 | [diff] [blame] | 699 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 700 | static void virtnet_netpoll(struct net_device *dev) |
| 701 | { |
| 702 | struct virtnet_info *vi = netdev_priv(dev); |
| 703 | |
| 704 | napi_schedule(&vi->napi); |
| 705 | } |
| 706 | #endif |
| 707 | |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 708 | static int virtnet_open(struct net_device *dev) |
| 709 | { |
| 710 | struct virtnet_info *vi = netdev_priv(dev); |
| 711 | |
Bruce Rogers | 3e9d08e | 2011-02-10 11:03:31 -0800 | [diff] [blame] | 712 | virtnet_napi_enable(vi); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 713 | return 0; |
| 714 | } |
| 715 | |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 716 | /* |
| 717 | * Send command via the control virtqueue and check status. Commands |
| 718 | * supported by the hypervisor, as indicated by feature bits, should |
| 719 | * never fail unless improperly formated. |
| 720 | */ |
| 721 | static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd, |
| 722 | struct scatterlist *data, int out, int in) |
| 723 | { |
Alex Williamson | 23e258e | 2009-05-01 17:27:56 +0000 | [diff] [blame] | 724 | struct scatterlist *s, sg[VIRTNET_SEND_COMMAND_SG_MAX + 2]; |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 725 | struct virtio_net_ctrl_hdr ctrl; |
| 726 | virtio_net_ctrl_ack status = ~0; |
| 727 | unsigned int tmp; |
Alex Williamson | 23e258e | 2009-05-01 17:27:56 +0000 | [diff] [blame] | 728 | int i; |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 729 | |
Alexander Beregalov | 0ee904c | 2009-04-11 14:50:23 +0000 | [diff] [blame] | 730 | /* Caller should know better */ |
| 731 | BUG_ON(!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ) || |
| 732 | (out + in > VIRTNET_SEND_COMMAND_SG_MAX)); |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 733 | |
| 734 | out++; /* Add header */ |
| 735 | in++; /* Add return status */ |
| 736 | |
| 737 | ctrl.class = class; |
| 738 | ctrl.cmd = cmd; |
| 739 | |
| 740 | sg_init_table(sg, out + in); |
| 741 | |
| 742 | sg_set_buf(&sg[0], &ctrl, sizeof(ctrl)); |
Alex Williamson | 23e258e | 2009-05-01 17:27:56 +0000 | [diff] [blame] | 743 | for_each_sg(data, s, out + in - 2, i) |
| 744 | sg_set_buf(&sg[i + 1], sg_virt(s), s->length); |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 745 | sg_set_buf(&sg[out + in - 1], &status, sizeof(status)); |
| 746 | |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 747 | BUG_ON(virtqueue_add_buf(vi->cvq, sg, out, in, vi) < 0); |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 748 | |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 749 | virtqueue_kick(vi->cvq); |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 750 | |
| 751 | /* |
| 752 | * Spin for a response, the kick causes an ioport write, trapping |
| 753 | * into the hypervisor, so the request should be handled immediately. |
| 754 | */ |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 755 | while (!virtqueue_get_buf(vi->cvq, &tmp)) |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 756 | cpu_relax(); |
| 757 | |
| 758 | return status == VIRTIO_NET_OK; |
| 759 | } |
| 760 | |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 761 | static int virtnet_close(struct net_device *dev) |
| 762 | { |
| 763 | struct virtnet_info *vi = netdev_priv(dev); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 764 | |
| 765 | napi_disable(&vi->napi); |
| 766 | |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 767 | return 0; |
| 768 | } |
| 769 | |
Alex Williamson | 2af7698 | 2009-02-04 09:02:40 +0000 | [diff] [blame] | 770 | static void virtnet_set_rx_mode(struct net_device *dev) |
| 771 | { |
| 772 | struct virtnet_info *vi = netdev_priv(dev); |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 773 | struct scatterlist sg[2]; |
Alex Williamson | 2af7698 | 2009-02-04 09:02:40 +0000 | [diff] [blame] | 774 | u8 promisc, allmulti; |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 775 | struct virtio_net_ctrl_mac *mac_data; |
Jiri Pirko | ccffad25 | 2009-05-22 23:22:17 +0000 | [diff] [blame] | 776 | struct netdev_hw_addr *ha; |
Jiri Pirko | 32e7bfc | 2010-01-25 13:36:10 -0800 | [diff] [blame] | 777 | int uc_count; |
Jiri Pirko | 4cd24ea | 2010-02-08 04:30:35 +0000 | [diff] [blame] | 778 | int mc_count; |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 779 | void *buf; |
| 780 | int i; |
Alex Williamson | 2af7698 | 2009-02-04 09:02:40 +0000 | [diff] [blame] | 781 | |
| 782 | /* We can't dynamicaly set ndo_set_rx_mode, so return gracefully */ |
| 783 | if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_RX)) |
| 784 | return; |
| 785 | |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 786 | promisc = ((dev->flags & IFF_PROMISC) != 0); |
| 787 | allmulti = ((dev->flags & IFF_ALLMULTI) != 0); |
Alex Williamson | 2af7698 | 2009-02-04 09:02:40 +0000 | [diff] [blame] | 788 | |
Alex Williamson | 23e258e | 2009-05-01 17:27:56 +0000 | [diff] [blame] | 789 | sg_init_one(sg, &promisc, sizeof(promisc)); |
Alex Williamson | 2af7698 | 2009-02-04 09:02:40 +0000 | [diff] [blame] | 790 | |
| 791 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX, |
| 792 | VIRTIO_NET_CTRL_RX_PROMISC, |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 793 | sg, 1, 0)) |
Alex Williamson | 2af7698 | 2009-02-04 09:02:40 +0000 | [diff] [blame] | 794 | dev_warn(&dev->dev, "Failed to %sable promisc mode.\n", |
| 795 | promisc ? "en" : "dis"); |
| 796 | |
Alex Williamson | 23e258e | 2009-05-01 17:27:56 +0000 | [diff] [blame] | 797 | sg_init_one(sg, &allmulti, sizeof(allmulti)); |
Alex Williamson | 2af7698 | 2009-02-04 09:02:40 +0000 | [diff] [blame] | 798 | |
| 799 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX, |
| 800 | VIRTIO_NET_CTRL_RX_ALLMULTI, |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 801 | sg, 1, 0)) |
Alex Williamson | 2af7698 | 2009-02-04 09:02:40 +0000 | [diff] [blame] | 802 | dev_warn(&dev->dev, "Failed to %sable allmulti mode.\n", |
| 803 | allmulti ? "en" : "dis"); |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 804 | |
Jiri Pirko | 32e7bfc | 2010-01-25 13:36:10 -0800 | [diff] [blame] | 805 | uc_count = netdev_uc_count(dev); |
Jiri Pirko | 4cd24ea | 2010-02-08 04:30:35 +0000 | [diff] [blame] | 806 | mc_count = netdev_mc_count(dev); |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 807 | /* MAC filter - use one buffer for both lists */ |
Jiri Pirko | 4cd24ea | 2010-02-08 04:30:35 +0000 | [diff] [blame] | 808 | buf = kzalloc(((uc_count + mc_count) * ETH_ALEN) + |
| 809 | (2 * sizeof(mac_data->entries)), GFP_ATOMIC); |
| 810 | mac_data = buf; |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 811 | if (!buf) { |
| 812 | dev_warn(&dev->dev, "No memory for MAC address buffer\n"); |
| 813 | return; |
| 814 | } |
| 815 | |
Alex Williamson | 23e258e | 2009-05-01 17:27:56 +0000 | [diff] [blame] | 816 | sg_init_table(sg, 2); |
| 817 | |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 818 | /* Store the unicast list and count in the front of the buffer */ |
Jiri Pirko | 32e7bfc | 2010-01-25 13:36:10 -0800 | [diff] [blame] | 819 | mac_data->entries = uc_count; |
Jiri Pirko | ccffad25 | 2009-05-22 23:22:17 +0000 | [diff] [blame] | 820 | i = 0; |
Jiri Pirko | 32e7bfc | 2010-01-25 13:36:10 -0800 | [diff] [blame] | 821 | netdev_for_each_uc_addr(ha, dev) |
Jiri Pirko | ccffad25 | 2009-05-22 23:22:17 +0000 | [diff] [blame] | 822 | memcpy(&mac_data->macs[i++][0], ha->addr, ETH_ALEN); |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 823 | |
| 824 | sg_set_buf(&sg[0], mac_data, |
Jiri Pirko | 32e7bfc | 2010-01-25 13:36:10 -0800 | [diff] [blame] | 825 | sizeof(mac_data->entries) + (uc_count * ETH_ALEN)); |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 826 | |
| 827 | /* multicast list and count fill the end */ |
Jiri Pirko | 32e7bfc | 2010-01-25 13:36:10 -0800 | [diff] [blame] | 828 | mac_data = (void *)&mac_data->macs[uc_count][0]; |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 829 | |
Jiri Pirko | 4cd24ea | 2010-02-08 04:30:35 +0000 | [diff] [blame] | 830 | mac_data->entries = mc_count; |
Jiri Pirko | 567ec87 | 2010-02-23 23:17:07 +0000 | [diff] [blame] | 831 | i = 0; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 832 | netdev_for_each_mc_addr(ha, dev) |
| 833 | memcpy(&mac_data->macs[i++][0], ha->addr, ETH_ALEN); |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 834 | |
| 835 | sg_set_buf(&sg[1], mac_data, |
Jiri Pirko | 4cd24ea | 2010-02-08 04:30:35 +0000 | [diff] [blame] | 836 | sizeof(mac_data->entries) + (mc_count * ETH_ALEN)); |
Alex Williamson | f565a7c | 2009-02-04 09:02:45 +0000 | [diff] [blame] | 837 | |
| 838 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC, |
| 839 | VIRTIO_NET_CTRL_MAC_TABLE_SET, |
| 840 | sg, 2, 0)) |
| 841 | dev_warn(&dev->dev, "Failed to set MAC fitler table.\n"); |
| 842 | |
| 843 | kfree(buf); |
Alex Williamson | 2af7698 | 2009-02-04 09:02:40 +0000 | [diff] [blame] | 844 | } |
| 845 | |
Alex Williamson | 1824a98 | 2009-05-01 17:31:10 +0000 | [diff] [blame] | 846 | static void virtnet_vlan_rx_add_vid(struct net_device *dev, u16 vid) |
Alex Williamson | 0bde9569 | 2009-02-04 09:02:50 +0000 | [diff] [blame] | 847 | { |
| 848 | struct virtnet_info *vi = netdev_priv(dev); |
| 849 | struct scatterlist sg; |
| 850 | |
Alex Williamson | 23e258e | 2009-05-01 17:27:56 +0000 | [diff] [blame] | 851 | sg_init_one(&sg, &vid, sizeof(vid)); |
Alex Williamson | 0bde9569 | 2009-02-04 09:02:50 +0000 | [diff] [blame] | 852 | |
| 853 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN, |
| 854 | VIRTIO_NET_CTRL_VLAN_ADD, &sg, 1, 0)) |
| 855 | dev_warn(&dev->dev, "Failed to add VLAN ID %d.\n", vid); |
| 856 | } |
| 857 | |
Alex Williamson | 1824a98 | 2009-05-01 17:31:10 +0000 | [diff] [blame] | 858 | static void virtnet_vlan_rx_kill_vid(struct net_device *dev, u16 vid) |
Alex Williamson | 0bde9569 | 2009-02-04 09:02:50 +0000 | [diff] [blame] | 859 | { |
| 860 | struct virtnet_info *vi = netdev_priv(dev); |
| 861 | struct scatterlist sg; |
| 862 | |
Alex Williamson | 23e258e | 2009-05-01 17:27:56 +0000 | [diff] [blame] | 863 | sg_init_one(&sg, &vid, sizeof(vid)); |
Alex Williamson | 0bde9569 | 2009-02-04 09:02:50 +0000 | [diff] [blame] | 864 | |
| 865 | if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN, |
| 866 | VIRTIO_NET_CTRL_VLAN_DEL, &sg, 1, 0)) |
| 867 | dev_warn(&dev->dev, "Failed to kill VLAN ID %d.\n", vid); |
| 868 | } |
| 869 | |
Stephen Hemminger | 0fc0b73 | 2009-09-02 01:03:33 -0700 | [diff] [blame] | 870 | static const struct ethtool_ops virtnet_ethtool_ops = { |
Mark McLoughlin | 9f4d26d | 2009-01-19 17:09:49 -0800 | [diff] [blame] | 871 | .get_link = ethtool_op_get_link, |
Herbert Xu | a9ea3fc | 2008-04-18 11:21:42 +0800 | [diff] [blame] | 872 | }; |
| 873 | |
Mark McLoughlin | 39da581 | 2008-11-26 13:58:11 +0000 | [diff] [blame] | 874 | #define MIN_MTU 68 |
| 875 | #define MAX_MTU 65535 |
| 876 | |
| 877 | static int virtnet_change_mtu(struct net_device *dev, int new_mtu) |
| 878 | { |
| 879 | if (new_mtu < MIN_MTU || new_mtu > MAX_MTU) |
| 880 | return -EINVAL; |
| 881 | dev->mtu = new_mtu; |
| 882 | return 0; |
| 883 | } |
| 884 | |
Stephen Hemminger | 76288b4 | 2009-01-06 10:44:22 -0800 | [diff] [blame] | 885 | static const struct net_device_ops virtnet_netdev = { |
| 886 | .ndo_open = virtnet_open, |
| 887 | .ndo_stop = virtnet_close, |
| 888 | .ndo_start_xmit = start_xmit, |
| 889 | .ndo_validate_addr = eth_validate_addr, |
Alex Williamson | 9c46f6d | 2009-02-04 16:36:34 -0800 | [diff] [blame] | 890 | .ndo_set_mac_address = virtnet_set_mac_address, |
Alex Williamson | 2af7698 | 2009-02-04 09:02:40 +0000 | [diff] [blame] | 891 | .ndo_set_rx_mode = virtnet_set_rx_mode, |
Stephen Hemminger | 76288b4 | 2009-01-06 10:44:22 -0800 | [diff] [blame] | 892 | .ndo_change_mtu = virtnet_change_mtu, |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 893 | .ndo_get_stats64 = virtnet_stats, |
Alex Williamson | 1824a98 | 2009-05-01 17:31:10 +0000 | [diff] [blame] | 894 | .ndo_vlan_rx_add_vid = virtnet_vlan_rx_add_vid, |
| 895 | .ndo_vlan_rx_kill_vid = virtnet_vlan_rx_kill_vid, |
Stephen Hemminger | 76288b4 | 2009-01-06 10:44:22 -0800 | [diff] [blame] | 896 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 897 | .ndo_poll_controller = virtnet_netpoll, |
| 898 | #endif |
| 899 | }; |
| 900 | |
Mark McLoughlin | 9f4d26d | 2009-01-19 17:09:49 -0800 | [diff] [blame] | 901 | static void virtnet_update_status(struct virtnet_info *vi) |
| 902 | { |
| 903 | u16 v; |
| 904 | |
| 905 | if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_STATUS)) |
| 906 | return; |
| 907 | |
| 908 | vi->vdev->config->get(vi->vdev, |
| 909 | offsetof(struct virtio_net_config, status), |
| 910 | &v, sizeof(v)); |
| 911 | |
| 912 | /* Ignore unknown (future) status bits */ |
| 913 | v &= VIRTIO_NET_S_LINK_UP; |
| 914 | |
| 915 | if (vi->status == v) |
| 916 | return; |
| 917 | |
| 918 | vi->status = v; |
| 919 | |
| 920 | if (vi->status & VIRTIO_NET_S_LINK_UP) { |
| 921 | netif_carrier_on(vi->dev); |
| 922 | netif_wake_queue(vi->dev); |
| 923 | } else { |
| 924 | netif_carrier_off(vi->dev); |
| 925 | netif_stop_queue(vi->dev); |
| 926 | } |
| 927 | } |
| 928 | |
| 929 | static void virtnet_config_changed(struct virtio_device *vdev) |
| 930 | { |
| 931 | struct virtnet_info *vi = vdev->priv; |
| 932 | |
| 933 | virtnet_update_status(vi); |
| 934 | } |
| 935 | |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 936 | static int virtnet_probe(struct virtio_device *vdev) |
| 937 | { |
| 938 | int err; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 939 | struct net_device *dev; |
| 940 | struct virtnet_info *vi; |
Michael S. Tsirkin | d2a7ddd | 2009-06-12 22:16:36 -0600 | [diff] [blame] | 941 | struct virtqueue *vqs[3]; |
| 942 | vq_callback_t *callbacks[] = { skb_recv_done, skb_xmit_done, NULL}; |
| 943 | const char *names[] = { "input", "output", "control" }; |
| 944 | int nvqs; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 945 | |
| 946 | /* Allocate ourselves a network device with room for our info */ |
| 947 | dev = alloc_etherdev(sizeof(struct virtnet_info)); |
| 948 | if (!dev) |
| 949 | return -ENOMEM; |
| 950 | |
| 951 | /* Set up network device as normal. */ |
Stephen Hemminger | 76288b4 | 2009-01-06 10:44:22 -0800 | [diff] [blame] | 952 | dev->netdev_ops = &virtnet_netdev; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 953 | dev->features = NETIF_F_HIGHDMA; |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 954 | |
Herbert Xu | a9ea3fc | 2008-04-18 11:21:42 +0800 | [diff] [blame] | 955 | SET_ETHTOOL_OPS(dev, &virtnet_ethtool_ops); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 956 | SET_NETDEV_DEV(dev, &vdev->dev); |
| 957 | |
| 958 | /* Do we support "hardware" checksums? */ |
Michał Mirosław | 98e778c | 2011-03-31 01:01:35 +0000 | [diff] [blame] | 959 | if (virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) { |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 960 | /* This opens up the world of extra features. */ |
Michał Mirosław | 98e778c | 2011-03-31 01:01:35 +0000 | [diff] [blame] | 961 | dev->hw_features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; |
| 962 | if (csum) |
| 963 | dev->features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; |
| 964 | |
| 965 | if (virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) { |
| 966 | dev->hw_features |= NETIF_F_TSO | NETIF_F_UFO |
Rusty Russell | 34a4857 | 2008-02-04 23:50:02 -0500 | [diff] [blame] | 967 | | NETIF_F_TSO_ECN | NETIF_F_TSO6; |
| 968 | } |
Rusty Russell | 5539ae9 | 2008-05-02 21:50:46 -0500 | [diff] [blame] | 969 | /* Individual feature bits: what can host handle? */ |
Michał Mirosław | 98e778c | 2011-03-31 01:01:35 +0000 | [diff] [blame] | 970 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO4)) |
| 971 | dev->hw_features |= NETIF_F_TSO; |
| 972 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO6)) |
| 973 | dev->hw_features |= NETIF_F_TSO6; |
| 974 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN)) |
| 975 | dev->hw_features |= NETIF_F_TSO_ECN; |
| 976 | if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_UFO)) |
| 977 | dev->hw_features |= NETIF_F_UFO; |
| 978 | |
| 979 | if (gso) |
| 980 | dev->features |= dev->hw_features & (NETIF_F_ALL_TSO|NETIF_F_UFO); |
| 981 | /* (!csum && gso) case will be fixed by register_netdev() */ |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 982 | } |
| 983 | |
| 984 | /* Configuration may specify what MAC to use. Otherwise random. */ |
Rusty Russell | c45a681 | 2008-05-02 21:50:50 -0500 | [diff] [blame] | 985 | if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) { |
Rusty Russell | a586d4f | 2008-02-04 23:49:56 -0500 | [diff] [blame] | 986 | vdev->config->get(vdev, |
| 987 | offsetof(struct virtio_net_config, mac), |
| 988 | dev->dev_addr, dev->addr_len); |
Alex Williamson | 62994b2 | 2009-04-04 16:40:19 -0700 | [diff] [blame] | 989 | } else |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 990 | random_ether_addr(dev->dev_addr); |
| 991 | |
| 992 | /* Set up our device-specific information */ |
| 993 | vi = netdev_priv(dev); |
Dor Laor | 6c0cd7c | 2007-12-16 15:19:43 +0200 | [diff] [blame] | 994 | netif_napi_add(dev, &vi->napi, virtnet_poll, napi_weight); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 995 | vi->dev = dev; |
| 996 | vi->vdev = vdev; |
Christian Borntraeger | d9d5dcc | 2008-02-18 10:02:51 +0100 | [diff] [blame] | 997 | vdev->priv = vi; |
Rusty Russell | fb6813f | 2008-07-25 12:06:01 -0500 | [diff] [blame] | 998 | vi->pages = NULL; |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 999 | vi->stats = alloc_percpu(struct virtnet_stats); |
| 1000 | err = -ENOMEM; |
| 1001 | if (vi->stats == NULL) |
| 1002 | goto free; |
| 1003 | |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 1004 | INIT_DELAYED_WORK(&vi->refill, refill_work); |
Michael S. Tsirkin | 5e01d2f | 2010-04-07 21:01:41 -0700 | [diff] [blame] | 1005 | sg_init_table(vi->rx_sg, ARRAY_SIZE(vi->rx_sg)); |
| 1006 | sg_init_table(vi->tx_sg, ARRAY_SIZE(vi->tx_sg)); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1007 | |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 1008 | /* If we can receive ANY GSO packets, we must allocate large ones. */ |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 1009 | if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) || |
| 1010 | virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6) || |
| 1011 | virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ECN)) |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 1012 | vi->big_packets = true; |
| 1013 | |
Mark McLoughlin | 3f2c31d | 2008-11-16 22:41:34 -0800 | [diff] [blame] | 1014 | if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF)) |
| 1015 | vi->mergeable_rx_bufs = true; |
| 1016 | |
Michael S. Tsirkin | d2a7ddd | 2009-06-12 22:16:36 -0600 | [diff] [blame] | 1017 | /* We expect two virtqueues, receive then send, |
| 1018 | * and optionally control. */ |
| 1019 | nvqs = virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ) ? 3 : 2; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1020 | |
Michael S. Tsirkin | d2a7ddd | 2009-06-12 22:16:36 -0600 | [diff] [blame] | 1021 | err = vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names); |
| 1022 | if (err) |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 1023 | goto free_stats; |
Michael S. Tsirkin | d2a7ddd | 2009-06-12 22:16:36 -0600 | [diff] [blame] | 1024 | |
| 1025 | vi->rvq = vqs[0]; |
| 1026 | vi->svq = vqs[1]; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1027 | |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 1028 | if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ)) { |
Michael S. Tsirkin | d2a7ddd | 2009-06-12 22:16:36 -0600 | [diff] [blame] | 1029 | vi->cvq = vqs[2]; |
Alex Williamson | 0bde9569 | 2009-02-04 09:02:50 +0000 | [diff] [blame] | 1030 | |
| 1031 | if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VLAN)) |
| 1032 | dev->features |= NETIF_F_HW_VLAN_FILTER; |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 1033 | } |
| 1034 | |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1035 | err = register_netdev(dev); |
| 1036 | if (err) { |
| 1037 | pr_debug("virtio_net: registering device failed\n"); |
Michael S. Tsirkin | d2a7ddd | 2009-06-12 22:16:36 -0600 | [diff] [blame] | 1038 | goto free_vqs; |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1039 | } |
Rusty Russell | b3369c1 | 2008-02-04 23:50:02 -0500 | [diff] [blame] | 1040 | |
| 1041 | /* Last of all, set up some receive buffers. */ |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 1042 | try_fill_recv(vi, GFP_KERNEL); |
Rusty Russell | b3369c1 | 2008-02-04 23:50:02 -0500 | [diff] [blame] | 1043 | |
| 1044 | /* If we didn't even get one input buffer, we're useless. */ |
| 1045 | if (vi->num == 0) { |
| 1046 | err = -ENOMEM; |
| 1047 | goto unregister; |
| 1048 | } |
| 1049 | |
Jason Wang | 167c25e | 2010-11-10 14:45:41 +0000 | [diff] [blame] | 1050 | /* Assume link up if device can't report link status, |
| 1051 | otherwise get link status from config. */ |
| 1052 | if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_STATUS)) { |
| 1053 | netif_carrier_off(dev); |
| 1054 | virtnet_update_status(vi); |
| 1055 | } else { |
| 1056 | vi->status = VIRTIO_NET_S_LINK_UP; |
| 1057 | netif_carrier_on(dev); |
| 1058 | } |
Mark McLoughlin | 9f4d26d | 2009-01-19 17:09:49 -0800 | [diff] [blame] | 1059 | |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1060 | pr_debug("virtnet: registered device %s\n", dev->name); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1061 | return 0; |
| 1062 | |
Rusty Russell | b3369c1 | 2008-02-04 23:50:02 -0500 | [diff] [blame] | 1063 | unregister: |
| 1064 | unregister_netdev(dev); |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 1065 | cancel_delayed_work_sync(&vi->refill); |
Michael S. Tsirkin | d2a7ddd | 2009-06-12 22:16:36 -0600 | [diff] [blame] | 1066 | free_vqs: |
| 1067 | vdev->config->del_vqs(vdev); |
stephen hemminger | 3fa2a1d | 2011-06-15 06:36:29 +0000 | [diff] [blame] | 1068 | free_stats: |
| 1069 | free_percpu(vi->stats); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1070 | free: |
| 1071 | free_netdev(dev); |
| 1072 | return err; |
| 1073 | } |
| 1074 | |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 1075 | static void free_unused_bufs(struct virtnet_info *vi) |
| 1076 | { |
| 1077 | void *buf; |
| 1078 | while (1) { |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 1079 | buf = virtqueue_detach_unused_buf(vi->svq); |
Shirley Ma | 830a8a9 | 2010-02-08 14:14:42 +0000 | [diff] [blame] | 1080 | if (!buf) |
| 1081 | break; |
| 1082 | dev_kfree_skb(buf); |
| 1083 | } |
| 1084 | while (1) { |
Michael S. Tsirkin | 1915a712 | 2010-04-12 16:19:04 +0300 | [diff] [blame] | 1085 | buf = virtqueue_detach_unused_buf(vi->rvq); |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 1086 | if (!buf) |
| 1087 | break; |
| 1088 | if (vi->mergeable_rx_bufs || vi->big_packets) |
| 1089 | give_pages(vi, buf); |
| 1090 | else |
| 1091 | dev_kfree_skb(buf); |
| 1092 | --vi->num; |
| 1093 | } |
| 1094 | BUG_ON(vi->num != 0); |
| 1095 | } |
| 1096 | |
Uwe Kleine-König | 3d1285b | 2009-09-30 22:28:34 +0000 | [diff] [blame] | 1097 | static void __devexit virtnet_remove(struct virtio_device *vdev) |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1098 | { |
Rusty Russell | 74b2553 | 2007-11-19 11:20:42 -0500 | [diff] [blame] | 1099 | struct virtnet_info *vi = vdev->priv; |
Rusty Russell | b3369c1 | 2008-02-04 23:50:02 -0500 | [diff] [blame] | 1100 | |
Rusty Russell | 6e5aa7e | 2008-02-04 23:50:03 -0500 | [diff] [blame] | 1101 | /* Stop all the virtqueues. */ |
| 1102 | vdev->config->reset(vdev); |
| 1103 | |
Rusty Russell | b3369c1 | 2008-02-04 23:50:02 -0500 | [diff] [blame] | 1104 | |
Rusty Russell | 74b2553 | 2007-11-19 11:20:42 -0500 | [diff] [blame] | 1105 | unregister_netdev(vi->dev); |
Rusty Russell | 3161e45 | 2009-08-26 12:22:32 -0700 | [diff] [blame] | 1106 | cancel_delayed_work_sync(&vi->refill); |
Shirley Ma | 830a8a9 | 2010-02-08 14:14:42 +0000 | [diff] [blame] | 1107 | |
| 1108 | /* Free unused buffers in both send and recv, if any. */ |
Shirley Ma | 9ab86bb | 2010-01-29 03:20:04 +0000 | [diff] [blame] | 1109 | free_unused_bufs(vi); |
Rusty Russell | fb6813f | 2008-07-25 12:06:01 -0500 | [diff] [blame] | 1110 | |
Michael S. Tsirkin | d2a7ddd | 2009-06-12 22:16:36 -0600 | [diff] [blame] | 1111 | vdev->config->del_vqs(vi->vdev); |
| 1112 | |
Rusty Russell | fb6813f | 2008-07-25 12:06:01 -0500 | [diff] [blame] | 1113 | while (vi->pages) |
| 1114 | __free_pages(get_a_page(vi, GFP_KERNEL), 0); |
| 1115 | |
Krishna Kumar | 2e66f55 | 2011-07-20 03:56:02 +0000 | [diff] [blame] | 1116 | free_percpu(vi->stats); |
Rusty Russell | 74b2553 | 2007-11-19 11:20:42 -0500 | [diff] [blame] | 1117 | free_netdev(vi->dev); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1118 | } |
| 1119 | |
| 1120 | static struct virtio_device_id id_table[] = { |
| 1121 | { VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID }, |
| 1122 | { 0 }, |
| 1123 | }; |
| 1124 | |
Rusty Russell | c45a681 | 2008-05-02 21:50:50 -0500 | [diff] [blame] | 1125 | static unsigned int features[] = { |
Mark McLoughlin | 5e4fe5c | 2008-07-08 17:10:42 +1000 | [diff] [blame] | 1126 | VIRTIO_NET_F_CSUM, VIRTIO_NET_F_GUEST_CSUM, |
| 1127 | VIRTIO_NET_F_GSO, VIRTIO_NET_F_MAC, |
Rusty Russell | c45a681 | 2008-05-02 21:50:50 -0500 | [diff] [blame] | 1128 | VIRTIO_NET_F_HOST_TSO4, VIRTIO_NET_F_HOST_UFO, VIRTIO_NET_F_HOST_TSO6, |
Herbert Xu | 97402b9 | 2008-04-18 11:24:27 +0800 | [diff] [blame] | 1129 | VIRTIO_NET_F_HOST_ECN, VIRTIO_NET_F_GUEST_TSO4, VIRTIO_NET_F_GUEST_TSO6, |
Sridhar Samudrala | 5c51675 | 2009-07-14 14:21:02 +0000 | [diff] [blame] | 1130 | VIRTIO_NET_F_GUEST_ECN, VIRTIO_NET_F_GUEST_UFO, |
Alex Williamson | 2a41f71 | 2009-02-04 09:02:34 +0000 | [diff] [blame] | 1131 | VIRTIO_NET_F_MRG_RXBUF, VIRTIO_NET_F_STATUS, VIRTIO_NET_F_CTRL_VQ, |
Alex Williamson | 0bde9569 | 2009-02-04 09:02:50 +0000 | [diff] [blame] | 1132 | VIRTIO_NET_F_CTRL_RX, VIRTIO_NET_F_CTRL_VLAN, |
Rusty Russell | c45a681 | 2008-05-02 21:50:50 -0500 | [diff] [blame] | 1133 | }; |
| 1134 | |
Uwe Kleine-König | 2240252 | 2009-11-05 01:32:44 -0800 | [diff] [blame] | 1135 | static struct virtio_driver virtio_net_driver = { |
Rusty Russell | c45a681 | 2008-05-02 21:50:50 -0500 | [diff] [blame] | 1136 | .feature_table = features, |
| 1137 | .feature_table_size = ARRAY_SIZE(features), |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1138 | .driver.name = KBUILD_MODNAME, |
| 1139 | .driver.owner = THIS_MODULE, |
| 1140 | .id_table = id_table, |
| 1141 | .probe = virtnet_probe, |
| 1142 | .remove = __devexit_p(virtnet_remove), |
Mark McLoughlin | 9f4d26d | 2009-01-19 17:09:49 -0800 | [diff] [blame] | 1143 | .config_changed = virtnet_config_changed, |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1144 | }; |
| 1145 | |
| 1146 | static int __init init(void) |
| 1147 | { |
Uwe Kleine-König | 2240252 | 2009-11-05 01:32:44 -0800 | [diff] [blame] | 1148 | return register_virtio_driver(&virtio_net_driver); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1149 | } |
| 1150 | |
| 1151 | static void __exit fini(void) |
| 1152 | { |
Uwe Kleine-König | 2240252 | 2009-11-05 01:32:44 -0800 | [diff] [blame] | 1153 | unregister_virtio_driver(&virtio_net_driver); |
Rusty Russell | 296f96f | 2007-10-22 11:03:37 +1000 | [diff] [blame] | 1154 | } |
| 1155 | module_init(init); |
| 1156 | module_exit(fini); |
| 1157 | |
| 1158 | MODULE_DEVICE_TABLE(virtio, id_table); |
| 1159 | MODULE_DESCRIPTION("Virtio network driver"); |
| 1160 | MODULE_LICENSE("GPL"); |