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Message-Id: <20240318110602.37166-3-xuanzhuo@linux.alibaba.com>
Date: Mon, 18 Mar 2024 19:05:55 +0800
From: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
"Michael S. Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>,
Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Stanislav Fomichev <sdf@...gle.com>,
Amritha Nambiar <amritha.nambiar@...el.com>,
Larysa Zaremba <larysa.zaremba@...el.com>,
Sridhar Samudrala <sridhar.samudrala@...el.com>,
Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
virtualization@...ts.linux.dev,
bpf@...r.kernel.org
Subject: [PATCH net-next v5 2/9] virtio_net: virtnet_send_command supports command-specific-result
As the spec https://github.com/oasis-tcs/virtio-spec/commit/42f389989823039724f95bbbd243291ab0064f82
The virtnet cvq supports to get result from the device.
Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
---
drivers/net/virtio_net.c | 47 +++++++++++++++++++++++-----------------
1 file changed, 27 insertions(+), 20 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index d7ce4a1011ea..af512d85cd5b 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2512,10 +2512,11 @@ static int virtnet_tx_resize(struct virtnet_info *vi,
* never fail unless improperly formatted.
*/
static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
- struct scatterlist *out)
+ struct scatterlist *out,
+ struct scatterlist *in)
{
- struct scatterlist *sgs[4], hdr, stat;
- unsigned out_num = 0, tmp;
+ struct scatterlist *sgs[5], hdr, stat;
+ u32 out_num = 0, tmp, in_num = 0;
int ret;
/* Caller should know better */
@@ -2533,10 +2534,13 @@ static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
/* Add return status. */
sg_init_one(&stat, &vi->ctrl->status, sizeof(vi->ctrl->status));
- sgs[out_num] = &stat;
+ sgs[out_num + in_num++] = &stat;
- BUG_ON(out_num + 1 > ARRAY_SIZE(sgs));
- ret = virtqueue_add_sgs(vi->cvq, sgs, out_num, 1, vi, GFP_ATOMIC);
+ if (in)
+ sgs[out_num + in_num++] = in;
+
+ BUG_ON(out_num + in_num > ARRAY_SIZE(sgs));
+ ret = virtqueue_add_sgs(vi->cvq, sgs, out_num, in_num, vi, GFP_ATOMIC);
if (ret < 0) {
dev_warn(&vi->vdev->dev,
"Failed to add sgs for command vq: %d\n.", ret);
@@ -2578,7 +2582,8 @@ static int virtnet_set_mac_address(struct net_device *dev, void *p)
if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
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)) {
+ VIRTIO_NET_CTRL_MAC_ADDR_SET,
+ &sg, NULL)) {
dev_warn(&vdev->dev,
"Failed to set mac address by vq command.\n");
ret = -EINVAL;
@@ -2647,7 +2652,7 @@ static void virtnet_ack_link_announce(struct virtnet_info *vi)
{
rtnl_lock();
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_ANNOUNCE,
- VIRTIO_NET_CTRL_ANNOUNCE_ACK, NULL))
+ VIRTIO_NET_CTRL_ANNOUNCE_ACK, NULL, NULL))
dev_warn(&vi->dev->dev, "Failed to ack link announce.\n");
rtnl_unlock();
}
@@ -2664,7 +2669,7 @@ static int _virtnet_set_queues(struct virtnet_info *vi, u16 queue_pairs)
sg_init_one(&sg, &vi->ctrl->mq, sizeof(vi->ctrl->mq));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MQ,
- VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &sg)) {
+ 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;
@@ -2727,14 +2732,14 @@ static void virtnet_set_rx_mode(struct net_device *dev)
sg_init_one(sg, &vi->ctrl->promisc, sizeof(vi->ctrl->promisc));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX,
- VIRTIO_NET_CTRL_RX_PROMISC, sg))
+ VIRTIO_NET_CTRL_RX_PROMISC, sg, NULL))
dev_warn(&dev->dev, "Failed to %sable promisc mode.\n",
vi->ctrl->promisc ? "en" : "dis");
sg_init_one(sg, &vi->ctrl->allmulti, sizeof(vi->ctrl->allmulti));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX,
- VIRTIO_NET_CTRL_RX_ALLMULTI, sg))
+ VIRTIO_NET_CTRL_RX_ALLMULTI, sg, NULL))
dev_warn(&dev->dev, "Failed to %sable allmulti mode.\n",
vi->ctrl->allmulti ? "en" : "dis");
@@ -2770,7 +2775,7 @@ static void virtnet_set_rx_mode(struct net_device *dev)
sizeof(mac_data->entries) + (mc_count * ETH_ALEN));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC,
- VIRTIO_NET_CTRL_MAC_TABLE_SET, sg))
+ VIRTIO_NET_CTRL_MAC_TABLE_SET, sg, NULL))
dev_warn(&dev->dev, "Failed to set MAC filter table.\n");
kfree(buf);
@@ -2786,7 +2791,7 @@ static int virtnet_vlan_rx_add_vid(struct net_device *dev,
sg_init_one(&sg, &vi->ctrl->vid, sizeof(vi->ctrl->vid));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN,
- VIRTIO_NET_CTRL_VLAN_ADD, &sg))
+ VIRTIO_NET_CTRL_VLAN_ADD, &sg, NULL))
dev_warn(&dev->dev, "Failed to add VLAN ID %d.\n", vid);
return 0;
}
@@ -2801,7 +2806,7 @@ static int virtnet_vlan_rx_kill_vid(struct net_device *dev,
sg_init_one(&sg, &vi->ctrl->vid, sizeof(vi->ctrl->vid));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN,
- VIRTIO_NET_CTRL_VLAN_DEL, &sg))
+ VIRTIO_NET_CTRL_VLAN_DEL, &sg, NULL))
dev_warn(&dev->dev, "Failed to kill VLAN ID %d.\n", vid);
return 0;
}
@@ -2920,7 +2925,7 @@ static int virtnet_send_ctrl_coal_vq_cmd(struct virtnet_info *vi,
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL,
VIRTIO_NET_CTRL_NOTF_COAL_VQ_SET,
- &sgs))
+ &sgs, NULL))
return -EINVAL;
return 0;
@@ -3062,7 +3067,7 @@ static bool virtnet_commit_rss_command(struct virtnet_info *vi)
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MQ,
vi->has_rss ? VIRTIO_NET_CTRL_MQ_RSS_CONFIG
- : VIRTIO_NET_CTRL_MQ_HASH_CONFIG, sgs)) {
+ : VIRTIO_NET_CTRL_MQ_HASH_CONFIG, sgs, NULL)) {
dev_warn(&dev->dev, "VIRTIONET issue with committing RSS sgs\n");
return false;
}
@@ -3380,7 +3385,7 @@ static int virtnet_send_tx_notf_coal_cmds(struct virtnet_info *vi,
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL,
VIRTIO_NET_CTRL_NOTF_COAL_TX_SET,
- &sgs_tx))
+ &sgs_tx, NULL))
return -EINVAL;
vi->intr_coal_tx.max_usecs = ec->tx_coalesce_usecs;
@@ -3430,7 +3435,7 @@ static int virtnet_send_rx_notf_coal_cmds(struct virtnet_info *vi,
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL,
VIRTIO_NET_CTRL_NOTF_COAL_RX_SET,
- &sgs_rx))
+ &sgs_rx, NULL))
return -EINVAL;
vi->intr_coal_rx.max_usecs = ec->rx_coalesce_usecs;
@@ -3899,7 +3904,8 @@ static int virtnet_set_guest_offloads(struct virtnet_info *vi, u64 offloads)
sg_init_one(&sg, &vi->ctrl->offloads, sizeof(vi->ctrl->offloads));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_GUEST_OFFLOADS,
- VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET, &sg)) {
+ VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET,
+ &sg, NULL)) {
dev_warn(&vi->dev->dev, "Fail to set guest offload.\n");
return -EINVAL;
}
@@ -4822,7 +4828,8 @@ static int virtnet_probe(struct virtio_device *vdev)
sg_init_one(&sg, dev->dev_addr, dev->addr_len);
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC,
- VIRTIO_NET_CTRL_MAC_ADDR_SET, &sg)) {
+ VIRTIO_NET_CTRL_MAC_ADDR_SET,
+ &sg, NULL)) {
pr_debug("virtio_net: setting MAC address failed\n");
rtnl_unlock();
err = -EINVAL;
--
2.32.0.3.g01195cf9f
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