[PATCH v2] drm/amdgpu: Fix VRAM BO evicition issue on resume

[Arunpravin Paneer Selvam]

This patch fixes the VRAM BO eviction issue during resume when
playing the steam game cuphead.

During psp resume, it requests a VRAM buffer of size 10240 KiB for
the trusted memory region, as part of this memory allocation we are
trying to evict few user buffers from VRAM to SYSTEM domain, the
eviction process fails as the selected resource doesn't have contiguous
blocks. Hence, the TMR memory request fails and the system stuck at
resume process.

This change will skip the resource which has non-contiguous blocks and
goes to the next available resource until it finds the contiguous blocks
resource and moves the resource from VRAM to SYSTEM domain and proceed
for the successful TMR allocation in VRAM and thus system comes out of
resume process.

v2:
  - Added issue link and fixes tag.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2213
Fixes: c9cad937c0c5 ("drm/amdgpu: add drm buddy support to amdgpu")
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam at amd.com>
Cc: stable at vger.kernel.org #6.0
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index aea8d26b1724..1964de6ac997 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1369,6 +1369,10 @@ static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
 	    amdgpu_bo_encrypted(ttm_to_amdgpu_bo(bo)))
 		return false;
 
+	if (bo->resource->mem_type == TTM_PL_VRAM &&
+	    !(bo->resource->placement & TTM_PL_FLAG_CONTIGUOUS))
+		return false;
+
 	return ttm_bo_eviction_valuable(bo, place);
 }
 
-- 
2.25.1