drm/ttm: Switch to using the new res callback

Apply new intersect and compatible callback instead
of having a generic placement range verfications.

v2: Added a separate callback for compatiblilty
    checks (Christian)
v3: Cleanups and removal of workarounds
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220820073304.178444-6-Arunpravin.PaneerSelvam@amd.com

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

@@ -1328,11 +1328,12 @@ uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
 static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
 					    const struct ttm_place *place)
 {
-	unsigned long num_pages = bo->resource->num_pages;
 	struct dma_resv_iter resv_cursor;
-	struct amdgpu_res_cursor cursor;
 	struct dma_fence *f;
 
+	if (!amdgpu_bo_is_amdgpu_bo(bo))
+		return ttm_bo_eviction_valuable(bo, place);
+
 	/* Swapout? */
 	if (bo->resource->mem_type == TTM_PL_SYSTEM)
 		return true;
@@ -1351,40 +1352,20 @@ static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
 			return false;
 	}
 
-	switch (bo->resource->mem_type) {
-	case AMDGPU_PL_PREEMPT:
-		/* Preemptible BOs don't own system resources managed by the
-		 * driver (pages, VRAM, GART space). They point to resources
-		 * owned by someone else (e.g. pageable memory in user mode
-		 * or a DMABuf). They are used in a preemptible context so we
-		 * can guarantee no deadlocks and good QoS in case of MMU
-		 * notifiers or DMABuf move notifiers from the resource owner.
-		 */
+	/* Preemptible BOs don't own system resources managed by the
+	 * driver (pages, VRAM, GART space). They point to resources
+	 * owned by someone else (e.g. pageable memory in user mode
+	 * or a DMABuf). They are used in a preemptible context so we
+	 * can guarantee no deadlocks and good QoS in case of MMU
+	 * notifiers or DMABuf move notifiers from the resource owner.
+	 */
+	if (bo->resource->mem_type == AMDGPU_PL_PREEMPT)
 		return false;
-	case TTM_PL_TT:
-		if (amdgpu_bo_is_amdgpu_bo(bo) &&
-		    amdgpu_bo_encrypted(ttm_to_amdgpu_bo(bo)))
-			return false;
-		return true;
 
-	case TTM_PL_VRAM:
-		/* Check each drm MM node individually */
-		amdgpu_res_first(bo->resource, 0, (u64)num_pages << PAGE_SHIFT,
-				 &cursor);
-		while (cursor.remaining) {
-			if (place->fpfn < PFN_DOWN(cursor.start + cursor.size)
-			    && !(place->lpfn &&
-				 place->lpfn <= PFN_DOWN(cursor.start)))
-				return true;
-
-			amdgpu_res_next(&cursor, cursor.size);
-		}
+	if (bo->resource->mem_type == TTM_PL_TT &&
+	    amdgpu_bo_encrypted(ttm_to_amdgpu_bo(bo)))
 		return false;
 
-	default:
-		break;
-	}
-
 	return ttm_bo_eviction_valuable(bo, place);
 }
 

drivers/gpu/drm/ttm/ttm_resource.c

@@ -276,17 +276,9 @@ bool ttm_resource_intersects(struct ttm_device *bdev,
 	if (!res)
 		return false;
 
-	if (!place)
-		return true;
-
 	man = ttm_manager_type(bdev, res->mem_type);
-	if (!man->func->intersects) {
-		if (place->fpfn >= (res->start + res->num_pages) ||
-		    (place->lpfn && place->lpfn <= res->start))
-			return false;
-
+	if (!place || !man->func->intersects)
 		return true;
-	}
 
 	return man->func->intersects(man, res, place, size);
 }
@@ -314,13 +306,8 @@ bool ttm_resource_compatible(struct ttm_device *bdev,
 		return false;
 
 	man = ttm_manager_type(bdev, res->mem_type);
-	if (!man->func->compatible) {
-		if (res->start < place->fpfn ||
-		    (place->lpfn && (res->start + res->num_pages) > place->lpfn))
-			return false;
-
+	if (!man->func->compatible)
 		return true;
-	}
 
 	return man->func->compatible(man, res, place, size);
 }