[dpdk-dev] [PATCH v2 2/3] vhost: call vDPA callback at the end of vring enable handler
Andy Pei
andy.pei at intel.com
Tue Sep 17 11:09:47 CEST 2019
vDPA's set_vring_state callback would need to know the virtqueues'
enable status to configure the hardware.
Signed-off-by: Xiaolong Ye <xiaolong.ye at intel.com>
Signed-off-by: Andy Pei <andy.pei at intel.com>
---
v2:
add nr_active_vring as a parameter to ops function set_vring_state in
case of callback in set_vring_state() and avoid exposing new API.
lib/librte_vhost/rte_vdpa.h | 4 ++--
lib/librte_vhost/vhost_user.c | 27 +++++++++++++++++++++++++--
2 files changed, 27 insertions(+), 4 deletions(-)
diff --git a/lib/librte_vhost/rte_vdpa.h b/lib/librte_vhost/rte_vdpa.h
index 9a3deb3..6e55d4d 100644
--- a/lib/librte_vhost/rte_vdpa.h
+++ b/lib/librte_vhost/rte_vdpa.h
@@ -54,8 +54,8 @@ struct rte_vdpa_dev_ops {
int (*dev_conf)(int vid);
int (*dev_close)(int vid);
- /** Enable/disable this vring */
- int (*set_vring_state)(int vid, int vring, int state);
+ /** Enable/disable vring queue pairs */
+ int (*set_vring_state)(int vid, int nr_active_vring);
/** Set features when changed */
int (*set_features)(int vid);
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 0b72648..4d7de44 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1325,6 +1325,25 @@ static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
return RTE_VHOST_MSG_RESULT_REPLY;
}
+static uint16_t
+vhost_get_active_vring_num(int vid)
+{
+ struct virtio_net *dev = get_device(vid);
+ struct vhost_virtqueue *vq;
+ uint16_t qid;
+
+ if (dev == NULL)
+ return 0;
+
+ for (qid = 0; qid < dev->nr_vring; qid++) {
+ vq = dev->virtqueue[qid];
+ if (!vq->enabled)
+ break;
+ }
+
+ return qid;
+}
+
/*
* when virtio queues are ready to work, qemu will send us to
* enable the virtio queue pair.
@@ -1339,6 +1358,7 @@ static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
int index = (int)msg->payload.state.index;
struct rte_vdpa_device *vdpa_dev;
int did = -1;
+ int nr_active_vring;
RTE_LOG(INFO, VHOST_CONFIG,
"set queue enable: %d to qp idx: %d\n",
@@ -1346,8 +1366,6 @@ static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
did = dev->vdpa_dev_id;
vdpa_dev = rte_vdpa_get_device(did);
- if (vdpa_dev && vdpa_dev->ops->set_vring_state)
- vdpa_dev->ops->set_vring_state(dev->vid, index, enable);
if (dev->notify_ops->vring_state_changed)
dev->notify_ops->vring_state_changed(dev->vid,
@@ -1359,6 +1377,11 @@ static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
dev->virtqueue[index]->enabled = enable;
+ if (vdpa_dev && vdpa_dev->ops->set_vring_state) {
+ nr_active_vring = vhost_get_active_vring_num(dev->vid);
+ vdpa_dev->ops->set_vring_state(dev->vid, nr_active_vring);
+ }
+
return RTE_VHOST_MSG_RESULT_OK;
}
--
1.8.3.1
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