#define MAX_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN)
#define GOOD_COPY_LEN 128
-#define VIRTNET_SEND_COMMAND_SG_MAX 2
#define VIRTNET_DRIVER_VERSION "1.0.0"
struct virtnet_stats {
skb_to_sgvec(skb, rq->sg + 1, 0, skb->len);
- err = virtqueue_add_buf(rq->vq, rq->sg, 0, 2, skb, gfp);
+ err = virtqueue_add_inbuf(rq->vq, rq->sg, 2, skb, gfp);
if (err < 0)
dev_kfree_skb(skb);
/* chain first in list head */
first->private = (unsigned long)list;
- err = virtqueue_add_buf(rq->vq, rq->sg, 0, MAX_SKB_FRAGS + 2,
- first, gfp);
+ err = virtqueue_add_inbuf(rq->vq, rq->sg, MAX_SKB_FRAGS + 2,
+ first, gfp);
if (err < 0)
give_pages(rq, first);
sg_init_one(rq->sg, page_address(page), PAGE_SIZE);
- err = virtqueue_add_buf(rq->vq, rq->sg, 0, 1, page, gfp);
+ err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, page, gfp);
if (err < 0)
give_pages(rq, page);
bool still_empty;
int i;
- for (i = 0; i < vi->max_queue_pairs; i++) {
+ for (i = 0; i < vi->curr_queue_pairs; i++) {
struct receive_queue *rq = &vi->rq[i];
napi_disable(&rq->napi);
struct virtnet_info *vi = netdev_priv(dev);
int i;
- for (i = 0; i < vi->max_queue_pairs; i++) {
+ for (i = 0; i < vi->curr_queue_pairs; i++) {
/* Make sure we have some buffers: if oom use wq. */
if (!try_fill_recv(&vi->rq[i], GFP_KERNEL))
schedule_delayed_work(&vi->refill, 0);
sg_set_buf(sq->sg, &hdr->hdr, sizeof hdr->hdr);
num_sg = skb_to_sgvec(skb, sq->sg + 1, 0, skb->len) + 1;
- return virtqueue_add_buf(sq->vq, sq->sg, num_sg,
- 0, skb, GFP_ATOMIC);
+ return virtqueue_add_outbuf(sq->vq, sq->sg, num_sg, skb, GFP_ATOMIC);
}
static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
* never fail unless improperly formated.
*/
static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
- struct scatterlist *data, int out, int in)
+ struct scatterlist *out,
+ struct scatterlist *in)
{
- struct scatterlist *s, sg[VIRTNET_SEND_COMMAND_SG_MAX + 2];
+ struct scatterlist *sgs[4], hdr, stat;
struct virtio_net_ctrl_hdr ctrl;
virtio_net_ctrl_ack status = ~0;
- unsigned int tmp;
- int i;
+ unsigned out_num = 0, in_num = 0, tmp;
/* Caller should know better */
- BUG_ON(!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ) ||
- (out + in > VIRTNET_SEND_COMMAND_SG_MAX));
-
- out++; /* Add header */
- in++; /* Add return status */
+ BUG_ON(!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ));
ctrl.class = class;
ctrl.cmd = cmd;
+ /* Add header */
+ sg_init_one(&hdr, &ctrl, sizeof(ctrl));
+ sgs[out_num++] = &hdr;
- sg_init_table(sg, out + in);
+ if (out)
+ sgs[out_num++] = out;
+ if (in)
+ sgs[out_num + in_num++] = in;
- sg_set_buf(&sg[0], &ctrl, sizeof(ctrl));
- for_each_sg(data, s, out + in - 2, i)
- sg_set_buf(&sg[i + 1], sg_virt(s), s->length);
- sg_set_buf(&sg[out + in - 1], &status, sizeof(status));
+ /* Add return status. */
+ sg_init_one(&stat, &status, sizeof(status));
+ sgs[out_num + in_num++] = &stat;
- BUG_ON(virtqueue_add_buf(vi->cvq, sg, out, in, vi, GFP_ATOMIC) < 0);
+ BUG_ON(out_num + in_num > ARRAY_SIZE(sgs));
+ BUG_ON(virtqueue_add_sgs(vi->cvq, sgs, out_num, in_num, vi, GFP_ATOMIC)
+ < 0);
virtqueue_kick(vi->cvq);
sg_init_one(&sg, addr->sa_data, dev->addr_len);
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC,
VIRTIO_NET_CTRL_MAC_ADDR_SET,
- &sg, 1, 0)) {
+ &sg, NULL)) {
dev_warn(&vdev->dev,
"Failed to set mac address by vq command.\n");
return -EINVAL;
{
rtnl_lock();
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_ANNOUNCE,
- VIRTIO_NET_CTRL_ANNOUNCE_ACK, NULL,
- 0, 0))
+ VIRTIO_NET_CTRL_ANNOUNCE_ACK, NULL, NULL))
dev_warn(&vi->dev->dev, "Failed to ack link announce.\n");
rtnl_unlock();
}
struct scatterlist sg;
struct virtio_net_ctrl_mq s;
struct net_device *dev = vi->dev;
+ int i;
if (!vi->has_cvq || !virtio_has_feature(vi->vdev, VIRTIO_NET_F_MQ))
return 0;
sg_init_one(&sg, &s, sizeof(s));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MQ,
- VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &sg, 1, 0)){
+ VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &sg, NULL)) {
dev_warn(&dev->dev, "Fail to set num of queue pairs to %d\n",
queue_pairs);
return -EINVAL;
- } else
+ } else {
+ for (i = vi->curr_queue_pairs; i < queue_pairs; i++)
+ if (!try_fill_recv(&vi->rq[i], GFP_KERNEL))
+ schedule_delayed_work(&vi->refill, 0);
vi->curr_queue_pairs = queue_pairs;
+ }
return 0;
}
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX,
VIRTIO_NET_CTRL_RX_PROMISC,
- sg, 1, 0))
+ sg, NULL))
dev_warn(&dev->dev, "Failed to %sable promisc mode.\n",
promisc ? "en" : "dis");
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX,
VIRTIO_NET_CTRL_RX_ALLMULTI,
- sg, 1, 0))
+ sg, NULL))
dev_warn(&dev->dev, "Failed to %sable allmulti mode.\n",
allmulti ? "en" : "dis");
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC,
VIRTIO_NET_CTRL_MAC_TABLE_SET,
- sg, 2, 0))
+ sg, NULL))
dev_warn(&dev->dev, "Failed to set MAC fitler table.\n");
kfree(buf);
sg_init_one(&sg, &vid, sizeof(vid));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN,
- VIRTIO_NET_CTRL_VLAN_ADD, &sg, 1, 0))
+ VIRTIO_NET_CTRL_VLAN_ADD, &sg, NULL))
dev_warn(&dev->dev, "Failed to add VLAN ID %d.\n", vid);
return 0;
}
sg_init_one(&sg, &vid, sizeof(vid));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN,
- VIRTIO_NET_CTRL_VLAN_DEL, &sg, 1, 0))
+ VIRTIO_NET_CTRL_VLAN_DEL, &sg, NULL))
dev_warn(&dev->dev, "Failed to kill VLAN ID %d.\n", vid);
return 0;
}
}
/* Last of all, set up some receive buffers. */
- for (i = 0; i < vi->max_queue_pairs; i++) {
+ for (i = 0; i < vi->curr_queue_pairs; i++) {
try_fill_recv(&vi->rq[i], GFP_KERNEL);
/* If we didn't even get one input buffer, we're useless. */
netif_device_attach(vi->dev);
- for (i = 0; i < vi->max_queue_pairs; i++)
+ for (i = 0; i < vi->curr_queue_pairs; i++)
if (!try_fill_recv(&vi->rq[i], GFP_KERNEL))
schedule_delayed_work(&vi->refill, 0);
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