drm/radeon/kms: Add initial support for async DMA on r6xx/r7xx

Uses the new multi-ring infrastucture.  6xx/7xx has a single
async DMA ring.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 8c42d54c2e26..461bf53709f5 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -109,7 +109,7 @@ extern int radeon_lockup_timeout;
 #define RADEON_BIOS_NUM_SCRATCH                 8
 
 /* max number of rings */
-#define RADEON_NUM_RINGS                        3
+#define RADEON_NUM_RINGS                        4
 
 /* fence seq are set to this number when signaled */
 #define RADEON_FENCE_SIGNALED_SEQ               0LL
@@ -122,6 +122,9 @@ extern int radeon_lockup_timeout;
 #define CAYMAN_RING_TYPE_CP1_INDEX              1
 #define CAYMAN_RING_TYPE_CP2_INDEX              2
 
+/* R600+ has an async dma ring */
+#define R600_RING_TYPE_DMA_INDEX                3
+
 /* hardcode those limit for now */
 #define RADEON_VA_IB_OFFSET                     (1 << 20)
 #define RADEON_VA_RESERVED_SIZE                 (8 << 20)
@@ -787,6 +790,11 @@ int radeon_ring_init(struct radeon_device *rdev, struct radeon_ring *cp, unsigne
 void radeon_ring_fini(struct radeon_device *rdev, struct radeon_ring *cp);
 
 
+/* r600 async dma */
+void r600_dma_stop(struct radeon_device *rdev);
+int r600_dma_resume(struct radeon_device *rdev);
+void r600_dma_fini(struct radeon_device *rdev);
+
 /*
  * CS.
  */
@@ -883,6 +891,7 @@ struct radeon_wb {
 #define RADEON_WB_CP_RPTR_OFFSET 1024
 #define RADEON_WB_CP1_RPTR_OFFSET 1280
 #define RADEON_WB_CP2_RPTR_OFFSET 1536
+#define R600_WB_DMA_RPTR_OFFSET   1792
 #define R600_WB_IH_WPTR_OFFSET   2048
 #define R600_WB_EVENT_OFFSET     3072