diff options
| author | Jason Wang | 2021-06-02 10:15:33 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin | 2021-07-08 07:49:01 -0400 |
| commit | 530a5678bc0083e84f99f38f77ced8fbb3d18434 (patch) | |
| tree | efe36d8359d486f9b03c9f3a093120e5b2f1c752 /include | |
| parent | 72b5e8958738aaa453db5149e6ca3bcf416023b9 (diff) | |
vdpa: support packed virtqueue for set/get_vq_state()
This patch extends the vdpa_vq_state to support packed virtqueue
state which is basically the device/driver ring wrap counters and the
avail and used index. This will be used for the virito-vdpa support
for the packed virtqueue and the future vhost/vhost-vdpa support for
the packed virtqueue.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210602021536.39525-2-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/vdpa.h | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index f311d227aa1b..3357ac98878d 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -28,13 +28,34 @@ struct vdpa_notification_area { }; /** - * struct vdpa_vq_state - vDPA vq_state definition + * struct vdpa_vq_state_split - vDPA split virtqueue state * @avail_index: available index */ -struct vdpa_vq_state { +struct vdpa_vq_state_split { u16 avail_index; }; +/** + * struct vdpa_vq_state_packed - vDPA packed virtqueue state + * @last_avail_counter: last driver ring wrap counter observed by device + * @last_avail_idx: device available index + * @last_used_counter: device ring wrap counter + * @last_used_idx: used index + */ +struct vdpa_vq_state_packed { + u16 last_avail_counter:1; + u16 last_avail_idx:15; + u16 last_used_counter:1; + u16 last_used_idx:15; +}; + +struct vdpa_vq_state { + union { + struct vdpa_vq_state_split split; + struct vdpa_vq_state_packed packed; + }; +}; + struct vdpa_mgmt_dev; /** |