drm/amdgpu: move VM eviction decision into amdgpu_vm.c

to #25447038

commit 6ceeb144b1d6952a36afa6c29718beac575f2a3f upstream.

When a page tables needs to be evicted the VM code should
decide if that is possible or not.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: Nmfkang <mfkang@linux.alibaba.com>
Reviewed-by: Nluanshi <zhangliguang@linux.alibaba.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -1474,11 +1474,8 @@ static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
 	struct dma_fence *f;
 	int i;
 
-	/* Don't evict VM page tables while they are busy, otherwise we can't
-	 * cleanly handle page faults.
-	 */
 	if (bo->type == ttm_bo_type_kernel &&
-	    !reservation_object_test_signaled_rcu(bo->resv, true))
+	    !amdgpu_vm_evictable(ttm_to_amdgpu_bo(bo)))
 		return false;
 
 	/* If bo is a KFD BO, check if the bo belongs to the current process.

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c

@@ -2415,6 +2415,30 @@ void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
 	kfree(bo_va);
 }
 
+/**
+ * amdgpu_vm_evictable - check if we can evict a VM
+ *
+ * @bo: A page table of the VM.
+ *
+ * Check if it is possible to evict a VM.
+ */
+bool amdgpu_vm_evictable(struct amdgpu_bo *bo)
+{
+	struct amdgpu_vm_bo_base *bo_base;
+
+	bo_base = list_first_entry(&bo->va, struct amdgpu_vm_bo_base, bo_list);
+
+	/* Page tables of a destroyed VM can go away immediately */
+	if (!bo_base || !bo_base->vm)
+		return true;
+
+	/* Don't evict VM page tables while they are busy */
+	if (!reservation_object_test_signaled_rcu(bo->tbo.resv, true))
+		return false;
+
+	return true;
+}
+
 /**
  * amdgpu_vm_bo_invalidate - mark the bo as invalid
  *

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h

@@ -295,6 +295,7 @@ int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
 int amdgpu_vm_bo_update(struct amdgpu_device *adev,
 			struct amdgpu_bo_va *bo_va,
 			bool clear);
+bool amdgpu_vm_evictable(struct amdgpu_bo *bo);
 void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
 			     struct amdgpu_bo *bo, bool evicted);
 struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,