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vhost: introduce wrappers for some vDPA ops

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This patch is preliminary work to make the vDPA device
structure opaque to the user application. Some callbacks
of the vDPA devices are used to query capabilities before
attaching to a Vhost port. This patch introduces wrappers
for these ops.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Adrián Moreno <amorenoz@redhat.com>
This commit is contained in:
Maxime Coquelin 2020-06-26 16:04:37 +02:00 committed by Ferruh Yigit
parent 08a4f9bab3
commit 8d44fc3a81
3 changed files with 103 additions and 0 deletions
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72
lib/librte_vhost/rte_vdpa.h
View File

@ -226,6 +226,78 @@ __rte_experimental
int
rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m);
/**
* @warning
* @b EXPERIMENTAL: this API may change without prior notice
*
* Get number of queue pairs supported by the vDPA device
*
* @param dev
* vDP device pointer
* @param queue_num
* pointer on where the number of queue is stored
* @return
* 0 on success, -1 on failure
*/
__rte_experimental
int
rte_vdpa_get_queue_num(struct rte_vdpa_device *dev, uint32_t *queue_num);
/**
* @warning
* @b EXPERIMENTAL: this API may change without prior notice
*
* Get the Virtio features supported by the vDPA device
*
* @param dev
* vDP device pointer
* @param features
* pointer on where the supported features are stored
* @return
* 0 on success, -1 on failure
*/
__rte_experimental
int
rte_vdpa_get_features(struct rte_vdpa_device *dev, uint64_t *features);
/**
* @warning
* @b EXPERIMENTAL: this API may change without prior notice
*
* Get the Vhost-user protocol features supported by the vDPA device
*
* @param dev
* vDP device pointer
* @param features
* pointer on where the supported protocol features are stored
* @return
* 0 on success, -1 on failure
*/
__rte_experimental
int
rte_vdpa_get_protocol_features(struct rte_vdpa_device *dev, uint64_t *features);
/**
* @warning
* @b EXPERIMENTAL: this API may change without prior notice
*
* Synchronize the used ring from mediated ring to guest, log dirty
* page for each writeable buffer, caller should handle the used
* ring logging before device stop.
*
* @param vid
* vhost device id
* @param qid
* vhost queue id
* @param vring_m
* mediated virtio ring pointer
* @return
* number of synced used entries on success, -1 on failure
*/
__rte_experimental
int
rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m);
/**
* @warning
* @b EXPERIMENTAL: this API may change without prior notice

3
lib/librte_vhost/rte_vhost_version.map
View File

@ -69,4 +69,7 @@ EXPERIMENTAL {
rte_vhost_slave_config_change;
rte_vdpa_find_device_by_name;
rte_vdpa_get_rte_device;
rte_vdpa_get_queue_num;
rte_vdpa_get_features;
rte_vdpa_get_protocol_features;
};

28
lib/librte_vhost/vdpa.c
View File

@ -229,6 +229,34 @@ rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m)
return -1;
}
int
rte_vdpa_get_queue_num(struct rte_vdpa_device *dev, uint32_t *queue_num)
{
if (dev == NULL || dev->ops == NULL || dev->ops->get_queue_num == NULL)
return -1;
return dev->ops->get_queue_num(dev, queue_num);
}
int
rte_vdpa_get_features(struct rte_vdpa_device *dev, uint64_t *features)
{
if (dev == NULL || dev->ops == NULL || dev->ops->get_features == NULL)
return -1;
return dev->ops->get_features(dev, features);
}
int
rte_vdpa_get_protocol_features(struct rte_vdpa_device *dev, uint64_t *features)
{
if (dev == NULL || dev->ops == NULL ||
dev->ops->get_protocol_features == NULL)
return -1;
return dev->ops->get_protocol_features(dev, features);
}
int
rte_vdpa_get_stats_names(struct rte_vdpa_device *dev,
struct rte_vdpa_stat_name *stats_names,