drm/radeon/kms: add support for compute rings in CS ioctl on SI

Very basic implementation for picking the ring priority.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index 5e459a3a872d..5cac83278338 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -103,8 +103,13 @@ static int radeon_cs_get_ring(struct radeon_cs_parser *p, u32 ring, s32 priority
                 p->ring = RADEON_RING_TYPE_GFX_INDEX;
                 break;
         case RADEON_CS_RING_COMPUTE:
-                /* for now */
-                p->ring = RADEON_RING_TYPE_GFX_INDEX;
+                if (p->rdev->family >= CHIP_TAHITI) {
+                        if (p->priority > 0)
+                                p->ring = CAYMAN_RING_TYPE_CP1_INDEX;
+                        else
+                                p->ring = CAYMAN_RING_TYPE_CP2_INDEX;
+                } else
+                        p->ring = RADEON_RING_TYPE_GFX_INDEX;
                 break;
         }
         return 0;