[PATCH] drm/amdgpu: Ignore KFD eviction fences invalidating preemptible DMABuf imports

[Eric Huang]

It is to avoid redundant eviction for KFD's DMAbuf import
bo when dmaunmapping DMAbuf. The DMAbuf import bo has
been set as AMDGPU_PL_PREEMPT in KFD when mapping.

Signed-off-by: Eric Huang <jinhuieric.huang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 2430f3e9f3a7..64795fe9eecb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -526,7 +526,12 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
 	if ((old_mem->mem_type == TTM_PL_TT ||
 	     old_mem->mem_type == AMDGPU_PL_PREEMPT) &&
 	    new_mem->mem_type == TTM_PL_SYSTEM) {
-		r = ttm_bo_wait_ctx(bo, ctx);
+		if (old_mem->mem_type == AMDGPU_PL_PREEMPT)
+			r = amdgpu_bo_sync_wait(abo,
+						AMDGPU_FENCE_OWNER_KFD,
+						ctx->interruptible);
+		else
+			r = ttm_bo_wait_ctx(bo, ctx);
 		if (r)
 			return r;
 
-- 
2.34.1