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drm: introduce a capability flag for syncobj timeline support 

Unfortunately userspace users of this API cannot be publicly disclosed
yet.

This commit effectively disables timeline syncobj ioctls for all
drivers. Each driver wishing to support this feature will need to
expose DRIVER_SYNCOBJ_TIMELINE.

v2: Add uAPI capability check (Christian)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com> (v1)
Cc: Dave Airlie <airlied@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Christian König <christian.koenig@amd.com>
Cc: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190416125750.31370-1-lionel.g.landwerlin@intel.com
This commit is contained in:
Lionel Landwerlin 2019-04-16 13:57:50 +01:00 committed by Dave Airlie
parent 5ec776383d
commit 060cebb20c
4 changed files with 16 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/drm_ioctl.c
View File

@ -245,6 +245,9 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_
case DRM_CAP_SYNCOBJ:
req->value = drm_core_check_feature(dev, DRIVER_SYNCOBJ);
return 0;
case DRM_CAP_SYNCOBJ_TIMELINE:
req->value = drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE);
return 0;
}
/* Other caps only work with KMS drivers */

10
drivers/gpu/drm/drm_syncobj.c
View File

@ -740,7 +740,7 @@ drm_syncobj_transfer_ioctl(struct drm_device *dev, void *data,
struct drm_syncobj_transfer *args = data;
int ret;
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
return -EOPNOTSUPP;
if (args->pad)
@ -1091,7 +1091,7 @@ drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
struct drm_syncobj **syncobjs;
int ret = 0;
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
return -EOPNOTSUPP;
if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL |
@ -1195,7 +1195,7 @@ drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
uint32_t i, j;
int ret;
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
return -EOPNOTSUPP;
if (args->pad != 0)
@ -1266,8 +1266,8 @@ int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
uint32_t i;
int ret;
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
return -ENODEV;
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
return -EOPNOTSUPP;
if (args->pad != 0)
return -EINVAL;

7
include/drm/drm_drv.h
View File

@ -91,6 +91,13 @@ enum drm_driver_feature {
* submission.
*/
DRIVER_SYNCOBJ = BIT(5),
/**
* @DRIVER_SYNCOBJ_TIMELINE:
*
* Driver supports the timeline flavor of &drm_syncobj for explicit
* synchronization of command submission.
*/
DRIVER_SYNCOBJ_TIMELINE = BIT(6),
/* IMPORTANT: Below are all the legacy flags, add new ones above. */

1
include/uapi/drm/drm.h
View File

@ -649,6 +649,7 @@ struct drm_gem_open {
#define DRM_CAP_PAGE_FLIP_TARGET 0x11
#define DRM_CAP_CRTC_IN_VBLANK_EVENT 0x12
#define DRM_CAP_SYNCOBJ 0x13
#define DRM_CAP_SYNCOBJ_TIMELINE 0x14
/** DRM_IOCTL_GET_CAP ioctl argument type */
struct drm_get_cap {