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vhost: make some vDPA callbacks mandatory

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Some of the vDPA callbacks have to be implemented
for vDPA to work properly.

This patch marks them as mandatory in the API doc and
simplify code calling these ops with removing
unnecessary checks that are now done at registration
time.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
This commit is contained in:
Maxime Coquelin 2020-07-06 13:24:47 +02:00 committed by Ferruh Yigit
parent 2ab58f20db
commit b46a99c600
5 changed files with 24 additions and 14 deletions
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14
lib/librte_vhost/rte_vdpa_dev.h
View file

@ -15,24 +15,26 @@
* vdpa device operations
*/
struct rte_vdpa_dev_ops {
/** Get capabilities of this device */
/** Get capabilities of this device (Mandatory) */
int (*get_queue_num)(struct rte_vdpa_device *dev, uint32_t *queue_num);
/** Get supported features of this device */
/** Get supported features of this device (Mandatory) */
int (*get_features)(struct rte_vdpa_device *dev, uint64_t *features);
/** Get supported protocol features of this device */
/** Get supported protocol features of this device (Mandatory) */
int (*get_protocol_features)(struct rte_vdpa_device *dev,
uint64_t *protocol_features);
/** Driver configure/close the device */
/** Driver configure the device (Mandatory) */
int (*dev_conf)(int vid);
/** Driver close the device (Mandatory) */
int (*dev_close)(int vid);
/** Enable/disable this vring */
/** Enable/disable this vring (Mandatory) */
int (*set_vring_state)(int vid, int vring, int state);
/** Set features when changed */
/** Set features when changed (Mandatory) */
int (*set_features)(int vid);
/** Destination operations when migration done */

6
lib/librte_vhost/socket.c
View file

@ -710,7 +710,7 @@ rte_vhost_driver_get_features(const char *path, uint64_t *features)
}
vdpa_dev = vsocket->vdpa_dev;
if (!vdpa_dev || !vdpa_dev->ops->get_features) {
if (!vdpa_dev) {
*features = vsocket->features;
goto unlock_exit;
}
@ -763,7 +763,7 @@ rte_vhost_driver_get_protocol_features(const char *path,
}
vdpa_dev = vsocket->vdpa_dev;
if (!vdpa_dev || !vdpa_dev->ops->get_protocol_features) {
if (!vdpa_dev) {
*protocol_features = vsocket->protocol_features;
goto unlock_exit;
}
@ -803,7 +803,7 @@ rte_vhost_driver_get_queue_num(const char *path, uint32_t *queue_num)
}
vdpa_dev = vsocket->vdpa_dev;
if (!vdpa_dev || !vdpa_dev->ops->get_queue_num) {
if (!vdpa_dev) {
*queue_num = VHOST_MAX_QUEUE_PAIRS;
goto unlock_exit;
}

10
lib/librte_vhost/vdpa.c
View file

@ -77,6 +77,16 @@ rte_vdpa_register_device(struct rte_device *rte_dev,
if (ops == NULL)
return NULL;
/* Check mandatory ops are implemented */
if (!ops->get_queue_num || !ops->get_features ||
!ops->get_protocol_features || !ops->dev_conf ||
!ops->dev_close || !ops->set_vring_state ||
!ops->set_features) {
VHOST_LOG_CONFIG(ERR,
"Some mandatory vDPA ops aren't implemented\n");
return NULL;
}
rte_spinlock_lock(&vdpa_device_list_lock);
/* Check the device hasn't been register already */
dev = __vdpa_find_device_by_name(rte_dev->name);

2
lib/librte_vhost/vhost.c
View file

@ -648,7 +648,7 @@ vhost_destroy_device_notify(struct virtio_net *dev)
if (dev->flags & VIRTIO_DEV_RUNNING) {
vdpa_dev = dev->vdpa_dev;
if (vdpa_dev && vdpa_dev->ops->dev_close)
if (vdpa_dev)
vdpa_dev->ops->dev_close(dev->vid);
dev->flags &= ~VIRTIO_DEV_RUNNING;
dev->notify_ops->destroy_device(dev->vid);

6
lib/librte_vhost/vhost_user.c
View file

@ -398,7 +398,7 @@ vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
}
vdpa_dev = dev->vdpa_dev;
if (vdpa_dev && vdpa_dev->ops->set_features)
if (vdpa_dev)
vdpa_dev->ops->set_features(dev->vid);
return RTE_VHOST_MSG_RESULT_OK;
@ -2866,9 +2866,7 @@ vhost_user_msg_handler(int vid, int fd)
goto out;
if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
if (vdpa_dev->ops->dev_conf)
vdpa_dev->ops->dev_conf(dev->vid);
vdpa_dev->ops->dev_conf(dev->vid);
dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
}