drm/radeon/kms: Add support for multi-ring sync in CS ioctl (v2)

Use semaphores to sync buffers across rings in the CS
ioctl.  Add a reloc flag to allow userspace to skip
sync for buffers.

agd5f: port to latest CS ioctl changes.

v2: add ring lock/unlock to make sure changes hit the ring.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/drm/radeon_drm.h b/include/drm/radeon_drm.h
index d7079f42624b..2a807a5669bc 100644
--- a/include/drm/radeon_drm.h
+++ b/include/drm/radeon_drm.h
@@ -917,6 +917,9 @@ struct drm_radeon_cs_chunk {
         uint64_t                chunk_data;
 };
 
+/* drm_radeon_cs_reloc.flags */
+#define RADEON_RELOC_DONT_SYNC          0x01
+
 struct drm_radeon_cs_reloc {
         uint32_t                handle;
         uint32_t                read_domains;