diff options
| author | Jason Wang <jasowang@redhat.com> | 2020-05-29 16:03:00 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-06-04 15:36:51 -0400 |
| commit | c25a26e653a61b93339dcd1b734c889df60b3eef (patch) | |
| tree | 34ce553accb68a73102bbd08ba1c54d8fa080982 /include/linux/vdpa.h | |
| parent | 5ce995f313ce56c0c62425c3ddc37c5c50fc33db (diff) | |
| download | linux-c25a26e653a61b93339dcd1b734c889df60b3eef.tar.bz2 | |
vdpa: introduce get_vq_notification method
This patch introduces a new method in the vdpa_config_ops which
reports the physical address and the size of the doorbell for a
specific virtqueue.
This will be used by the future patches that maps doorbell to
userspace.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20200529080303.15449-4-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/linux/vdpa.h')
| -rw-r--r-- | include/linux/vdpa.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 5453af87a33e..239db794357c 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -18,6 +18,16 @@ struct vdpa_callback { }; /** + * vDPA notification area + * @addr: base address of the notification area + * @size: size of the notification area + */ +struct vdpa_notification_area { + resource_size_t addr; + resource_size_t size; +}; + +/** * vDPA device - representation of a vDPA device * @dev: underlying device * @dma_dev: the actual device that is performing DMA @@ -73,6 +83,10 @@ struct vdpa_device { * @vdev: vdpa device * @idx: virtqueue index * Returns virtqueue state (last_avail_idx) + * @get_vq_notification: Get the notification area for a virtqueue + * @vdev: vdpa device + * @idx: virtqueue index + * Returns the notifcation area * @get_vq_align: Get the virtqueue align requirement * for the device * @vdev: vdpa device @@ -162,6 +176,8 @@ struct vdpa_config_ops { bool (*get_vq_ready)(struct vdpa_device *vdev, u16 idx); int (*set_vq_state)(struct vdpa_device *vdev, u16 idx, u64 state); u64 (*get_vq_state)(struct vdpa_device *vdev, u16 idx); + struct vdpa_notification_area + (*get_vq_notification)(struct vdpa_device *vdev, u16 idx); /* Device ops */ u32 (*get_vq_align)(struct vdpa_device *vdev); |