drm/amdgpu: use GTT only as fallback for VRAM|GTT

Try to fill up VRAM as well by setting the busy flag on GTT allocations.

This fixes the issue that when VRAM was evacuated for suspend it's never
filled up again unless the application is restarted.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229134003.3688-2-christian.koenig@amd.com

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 010b0cb..8bc7992 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -173,6 +173,12 @@ void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
                        abo->flags & AMDGPU_GEM_CREATE_PREEMPTIBLE ?
                        AMDGPU_PL_PREEMPT : TTM_PL_TT;
                places[c].flags = 0;
+               /*
+                * When GTT is just an alternative to VRAM make sure that we
+                * only use it as fallback and still try to fill up VRAM first.
+                */
+               if (domain & abo->preferred_domains & AMDGPU_GEM_DOMAIN_VRAM)
+                       places[c].flags |= TTM_PL_FLAG_FALLBACK;
                c++;
        }