From: Changchun Ouyang <changchun.ouy...@intel.com>
This message is used to enable/disable a specific vring queue pair.
The first queue pair is enabled by default.
Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com>
Signed-off-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>
---
lib/librte_vhost/rte_virtio_net.h | 1 +
lib/librte_vhost/vhost_rxtx.c | 10 ++++++++++
lib/librte_vhost/vhost_user/vhost-net-user.c | 5 +++++
lib/librte_vhost/vhost_user/vhost-net-user.h | 1 +
lib/librte_vhost/vhost_user/virtio-net-user.c | 22 ++++++++++++++++++++++
lib/librte_vhost/vhost_user/virtio-net-user.h | 3 +++
lib/librte_vhost/virtio-net.c | 12 +++++++++---
7 files changed, 51 insertions(+), 3 deletions(-)
diff --git a/lib/librte_vhost/rte_virtio_net.h
b/lib/librte_vhost/rte_virtio_net.h
index 5dd6493..08b69df 100644
--- a/lib/librte_vhost/rte_virtio_net.h
+++ b/lib/librte_vhost/rte_virtio_net.h
@@ -89,6 +89,7 @@ struct vhost_virtqueue {
volatile uint16_t last_used_idx_res; /**< Used for multiple
devices reserving buffers. */
int callfd; /**< Used to notify the
guest (trigger interrupt). */
int kickfd; /**< Currently unused
as polling mode is enabled. */
+ int enabled;
struct buf_vector buf_vec[BUF_VECTOR_MAX]; /**< for
scatter RX. */
} __rte_cache_aligned;
diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index a4ab6ca..aa9ccda 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -86,6 +86,9 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
}
vq = dev->virtqueue[queue_id];
+ if (unlikely(vq->enabled == 0))
+ return 0;
+
count = (count > MAX_PKT_BURST) ? MAX_PKT_BURST : count;
/*
@@ -278,6 +281,7 @@ copy_from_mbuf_to_vring(struct virtio_net *dev, uint32_t
queue_id,
* (guest physical addr -> vhost virtual addr)
*/
vq = dev->virtqueue[queue_id];
+
vb_addr = gpa_to_vva(dev, vq->buf_vec[vec_idx].buf_addr);
vb_hdr_addr = vb_addr;
@@ -485,6 +489,9 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t
queue_id,
}
vq = dev->virtqueue[queue_id];
+ if (unlikely(vq->enabled == 0))
+ return 0;
+
count = RTE_MIN((uint32_t)MAX_PKT_BURST, count);
if (count == 0)
@@ -583,6 +590,9 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t
queue_id,
}
vq = dev->virtqueue[queue_id];
+ if (unlikely(vq->enabled == 0))
+ return 0;
+
avail_idx = *((volatile uint16_t *)&vq->avail->idx);
/* If there are no available buffers then return. */
diff --git a/lib/librte_vhost/vhost_user/vhost-net-user.c
b/lib/librte_vhost/vhost_user/vhost-net-user.c
index 8675cd4..f681676 100644
--- a/lib/librte_vhost/vhost_user/vhost-net-user.c
+++ b/lib/librte_vhost/vhost_user/vhost-net-user.c
@@ -99,6 +99,7 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_GET_PROTOCOL_FEATURES] =
"VHOST_USER_GET_PROTOCOL_FEATURES",
[VHOST_USER_SET_PROTOCOL_FEATURES] =
"VHOST_USER_SET_PROTOCOL_FEATURES",
[VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM",
+ [VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE",
};
/**
@@ -428,6 +429,10 @@ vserver_message_handler(int connfd, void *dat, int *remove)
send_vhost_message(connfd, &msg);
break;
+ case VHOST_USER_SET_VRING_ENABLE:
+ user_set_vring_enable(ctx, &msg.payload.state);
+ break;
+
default:
break;
diff --git a/lib/librte_vhost/vhost_user/vhost-net-user.h
b/lib/librte_vhost/vhost_user/vhost-net-user.h
index 389d21d..38637cc 100644
--- a/lib/librte_vhost/vhost_user/vhost-net-user.h
+++ b/lib/librte_vhost/vhost_user/vhost-net-user.h
@@ -66,6 +66,7 @@ typedef enum VhostUserRequest {
VHOST_USER_GET_PROTOCOL_FEATURES = 15,
VHOST_USER_SET_PROTOCOL_FEATURES = 16,
VHOST_USER_GET_QUEUE_NUM = 17,
+ VHOST_USER_SET_VRING_ENABLE = 18,
VHOST_USER_MAX
} VhostUserRequest;
diff --git a/lib/librte_vhost/vhost_user/virtio-net-user.c
b/lib/librte_vhost/vhost_user/virtio-net-user.c
index e83d279..9871f20 100644
--- a/lib/librte_vhost/vhost_user/virtio-net-user.c
+++ b/lib/librte_vhost/vhost_user/virtio-net-user.c
@@ -306,6 +306,28 @@ user_get_vring_base(struct vhost_device_ctx ctx,
return 0;
}
+/*
+ * when virtio queues are ready to work, qemu will send us to
+ * enable the virtio queue pair.
+ */
+int
+user_set_vring_enable(struct vhost_device_ctx ctx,
+ struct vhost_vring_state *state)
+{
+ struct virtio_net *dev = get_device(ctx);
+ uint32_t base_idx = state->index;
+ int enabled = (int)state->num;
+
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "set queue enable: %d to qp idx: %d\n",
+ enabled, state->index);
+
+ dev->virtqueue[base_idx + VIRTIO_RXQ]->enabled = enabled;
+ dev->virtqueue[base_idx + VIRTIO_TXQ]->enabled = enabled;
+
+ return 0;
+}
+
void
user_destroy_device(struct vhost_device_ctx ctx)
{
diff --git a/lib/librte_vhost/vhost_user/virtio-net-user.h
b/lib/librte_vhost/vhost_user/virtio-net-user.h
index e7a6ff4..d46057e 100644
--- a/lib/librte_vhost/vhost_user/virtio-net-user.h
+++ b/lib/librte_vhost/vhost_user/virtio-net-user.h
@@ -50,5 +50,8 @@ void user_set_protocol_features(struct vhost_device_ctx ctx,
int user_get_vring_base(struct vhost_device_ctx, struct vhost_vring_state *);
+int user_set_vring_enable(struct vhost_device_ctx ctx,
+ struct vhost_vring_state *state);
+
void user_destroy_device(struct vhost_device_ctx);
#endif
diff --git a/lib/librte_vhost/virtio-net.c b/lib/librte_vhost/virtio-net.c
index 643a92e..5fe1ad6 100644
--- a/lib/librte_vhost/virtio-net.c
+++ b/lib/librte_vhost/virtio-net.c
@@ -254,7 +254,7 @@ rm_config_ll_entry(struct virtio_net_config_ll *ll_dev,
}
static void
-init_vring_queue(struct vhost_virtqueue *vq)
+init_vring_queue(struct vhost_virtqueue *vq, int qp_idx)
{
memset(vq, 0, sizeof(struct vhost_virtqueue));
@@ -263,13 +263,19 @@ init_vring_queue(struct vhost_virtqueue *vq)
/* Backends are set to -1 indicating an inactive device. */
vq->backend = -1;
+
+ /* always set the default vq pair to enabled */
+ if (qp_idx == 0)
+ vq->enabled = 1;
}
static void
init_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
{
- init_vring_queue(dev->virtqueue[qp_idx * VIRTIO_QNUM + VIRTIO_RXQ]);
- init_vring_queue(dev->virtqueue[qp_idx * VIRTIO_QNUM + VIRTIO_TXQ]);
+ uint32_t base_idx = qp_idx * VIRTIO_QNUM;
+
+ init_vring_queue(dev->virtqueue[base_idx + VIRTIO_RXQ], qp_idx);
+ init_vring_queue(dev->virtqueue[base_idx + VIRTIO_TXQ], qp_idx);
}
static int
--
1.9.0
