On Wed, May 24, 2017 at 05:06:11PM +1000, Dave Airlie wrote:
> From: Dave Airlie <airlied@xxxxxxxxxx>
>
> Sync objects are new toplevel drm object, that contain a
> pointer to a fence. This fence can be updated via command
> submission ioctls via drivers.
>
> There is also a generic wait obj API modelled on the vulkan
> wait API (with code modelled on some amdgpu code).
>
> These objects can be converted to an opaque fd that can be
> passes between processes.
>
> v2: rename reference/unreference to put/get (Chris)
> fix leaked reference (David Zhou)
> drop mutex in favour of cmpxchg (Chris)
> v3: cleanups from danvet, rebase on drm_fops rename
> check fd_flags is 0 in ioctls.
>
> Reviewed-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
> Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
> ---
> diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
> index 42d9f64..96c5c78 100644
> --- a/include/uapi/drm/drm.h
> +++ b/include/uapi/drm/drm.h
> @@ -648,6 +648,7 @@ struct drm_gem_open {
> #define DRM_CAP_ADDFB2_MODIFIERS 0x10
> #define DRM_CAP_PAGE_FLIP_TARGET 0x11
> #define DRM_CAP_CRTC_IN_VBLANK_EVENT 0x12
> +#define DRM_CAP_SYNCOBJ 0x13
>
> /** DRM_IOCTL_GET_CAP ioctl argument type */
> struct drm_get_cap {
> @@ -697,6 +698,24 @@ struct drm_prime_handle {
> __s32 fd;
> };
>
> +struct drm_syncobj_create {
> + __u32 handle;
> + __u32 flags;
> +};
> +
> +struct drm_syncobj_destroy {
> + __u32 handle;
> + __u32 pad;
> +};
> +
> +struct drm_syncobj_handle {
> + __u32 handle;
> + __u32 flags;
> +
> + __s32 fd;
> + __u32 pad;
> +};
> +
> #if defined(__cplusplus)
> }
> #endif
> @@ -815,6 +834,11 @@ extern "C" {
> #define DRM_IOCTL_MODE_CREATEPROPBLOB DRM_IOWR(0xBD, struct drm_mode_create_blob)
> #define DRM_IOCTL_MODE_DESTROYPROPBLOB DRM_IOWR(0xBE, struct drm_mode_destroy_blob)
>
> +#define DRM_IOCTL_SYNCOBJ_CREATE DRM_IOWR(0xBF, struct drm_syncobj_create)
> +#define DRM_IOCTL_SYNCOBJ_DESTROY DRM_IOWR(0xC0, struct drm_syncobj_destroy)
These two only need DRM_IOW.
> +#define DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD DRM_IOWR(0xC1, struct drm_syncobj_handle)
> +#define DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE DRM_IOWR(0xC2, struct drm_syncobj_handle)
With that,
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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