drm/radeon: add the infrastructure for concurrent buffer access

This allows us to specify if we want to sync to
the shared fences of a reservation object or not.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 13 insertions, 12 deletions

diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 1f598ab3b9a7..0b5a230d8b96 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -3959,18 +3959,19 @@ bool cik_semaphore_ring_emit(struct radeon_device *rdev,
  * @src_offset: src GPU address
  * @dst_offset: dst GPU address
  * @num_gpu_pages: number of GPU pages to xfer
- * @fence: radeon fence object
+ * @resv: reservation object to sync to
  *
  * Copy GPU paging using the CP DMA engine (CIK+).
  * Used by the radeon ttm implementation to move pages if
  * registered as the asic copy callback.
  */
-int cik_copy_cpdma(struct radeon_device *rdev,
-                   uint64_t src_offset, uint64_t dst_offset,
-                   unsigned num_gpu_pages,
-                   struct radeon_fence **fence)
+struct radeon_fence *cik_copy_cpdma(struct radeon_device *rdev,
+                                    uint64_t src_offset, uint64_t dst_offset,
+                                    unsigned num_gpu_pages,
+                                    struct reservation_object *resv)
 {
         struct radeon_semaphore *sem = NULL;
+        struct radeon_fence *fence;
         int ring_index = rdev->asic->copy.blit_ring_index;
         struct radeon_ring *ring = &rdev->ring[ring_index];
         u32 size_in_bytes, cur_size_in_bytes, control;
@@ -3980,7 +3981,7 @@ int cik_copy_cpdma(struct radeon_device *rdev,
         r = radeon_semaphore_create(rdev, &sem);
         if (r) {
                 DRM_ERROR("radeon: moving bo (%d).\n", r);
-                return r;
+                return ERR_PTR(r);
         }
 
         size_in_bytes = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT);
@@ -3989,10 +3990,10 @@ int cik_copy_cpdma(struct radeon_device *rdev,
         if (r) {
                 DRM_ERROR("radeon: moving bo (%d).\n", r);
                 radeon_semaphore_free(rdev, &sem, NULL);
-                return r;
+                return ERR_PTR(r);
         }
 
-        radeon_semaphore_sync_to(sem, *fence);
+        radeon_semaphore_sync_resv(sem, resv, false);
         radeon_semaphore_sync_rings(rdev, sem, ring->idx);
 
         for (i = 0; i < num_loops; i++) {
@@ -4014,17 +4015,17 @@ int cik_copy_cpdma(struct radeon_device *rdev,
                 dst_offset += cur_size_in_bytes;
         }
 
-        r = radeon_fence_emit(rdev, fence, ring->idx);
+        r = radeon_fence_emit(rdev, &fence, ring->idx);
         if (r) {
                 radeon_ring_unlock_undo(rdev, ring);
                 radeon_semaphore_free(rdev, &sem, NULL);
-                return r;
+                return ERR_PTR(r);
         }
 
         radeon_ring_unlock_commit(rdev, ring, false);
-        radeon_semaphore_free(rdev, &sem, *fence);
+        radeon_semaphore_free(rdev, &sem, fence);
 
-        return r;
+        return fence;
 }
 
 /*