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vdpa: Enable a user to add and delete a vdpa device

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Add the ability to add and delete a vdpa device.

Examples:
Create a vdpa device of type network named "foo2" from
the management device vdpasim:

$ vdpa dev add mgmtdev vdpasim_net name foo2

Delete the vdpa device after its use:
$ vdpa dev del foo2

Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210105103203.82508-5-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Parav Pandit 2021-01-05 12:32:01 +02:00 • committed by Michael S. Tsirkin
parent 33b347503f
commit 903f7bcaed
3 changed files with 143 additions and 10 deletions
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6
include/linux/vdpa.h
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@ -45,6 +45,8 @@ struct vdpa_mgmt_dev;
* @index: device index
* @features_valid: were features initialized? for legacy guests
* @nvqs: maximum number of supported virtqueues
* @mdev: management device pointer; caller must setup when registering device as part
* of dev_add() mgmtdev ops callback before invoking _vdpa_register_device().
*/
struct vdpa_device {
struct device dev;
@ -53,6 +55,7 @@ struct vdpa_device {
unsigned int index;
bool features_valid;
int nvqs;
struct vdpa_mgmt_dev *mdev;
};
/**
@ -260,6 +263,9 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
int vdpa_register_device(struct vdpa_device *vdev);
void vdpa_unregister_device(struct vdpa_device *vdev);
int _vdpa_register_device(struct vdpa_device *vdev);
void _vdpa_unregister_device(struct vdpa_device *vdev);
/**
* vdpa_driver - operations for a vDPA driver
* @driver: underlying device driver