From: Jason Wang Date: Fri, 29 May 2020 08:03:00 +0000 (+0800) Subject: vdpa: introduce get_vq_notification method X-Git-Tag: v5.15~3623^2~32 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c25a26e653a61b93339dcd1b734c889df60b3eef;p=platform%2Fkernel%2Flinux-starfive.git 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 Link: https://lore.kernel.org/r/20200529080303.15449-4-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin --- diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 5453af8..239db79 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);