gallium/radeon: add a heuristic for better (S)DMA performance

Reviewed-by: Alex Deucher <[email protected]>
Reviewed-by: Nicolai Hähnle <[email protected]>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
index 9534b972a46..a5d703347c7 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
@@ -563,6 +563,13 @@ static boolean amdgpu_cs_memory_below_limit(struct radeon_winsys_cs *rcs, uint64
    return gtt < ws->info.gart_size * 0.7;
 }
 
+static uint64_t amdgpu_cs_query_memory_usage(struct radeon_winsys_cs *rcs)
+{
+   struct amdgpu_cs *cs = amdgpu_cs(rcs);
+
+   return cs->used_vram + cs->used_gart;
+}
+
 static unsigned amdgpu_cs_get_buffer_list(struct radeon_winsys_cs *rcs,
                                           struct radeon_bo_list_item *list)
 {
@@ -828,6 +835,7 @@ void amdgpu_cs_init_functions(struct amdgpu_winsys *ws)
    ws->base.cs_lookup_buffer = amdgpu_cs_lookup_buffer;
    ws->base.cs_validate = amdgpu_cs_validate;
    ws->base.cs_memory_below_limit = amdgpu_cs_memory_below_limit;
+   ws->base.cs_query_memory_usage = amdgpu_cs_query_memory_usage;
    ws->base.cs_get_buffer_list = amdgpu_cs_get_buffer_list;
    ws->base.cs_flush = amdgpu_cs_flush;
    ws->base.cs_is_buffer_referenced = amdgpu_bo_is_referenced;