drm/amdgpu: flush gart changes after all BO recovery

Don't flush gart changes after recovering each BO instead
do it after recovering all the BOs. Flishing gart also needed
for amdgpu_ttm_alloc_gart().

v4: use containerof to retrieve adev struct.
v3: rename amdgpu_gart_tlb_flush() -> amdgpu_gart_invalidate_tlb().
v2: abstract out gart tlb flushing logic to amdgpu_gart.c
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -312,8 +312,6 @@ int amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t offset,
 		     int pages, struct page **pagelist, dma_addr_t *dma_addr,
 		     uint64_t flags)
 {
-	int r, i;
-
 	if (!adev->gart.ready) {
 		WARN(1, "trying to bind memory to uninitialized GART !\n");
 		return -EINVAL;
@@ -322,16 +320,26 @@ int amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t offset,
 	if (!adev->gart.ptr)
 		return 0;
 
-	r = amdgpu_gart_map(adev, offset, pages, dma_addr, flags,
-		    adev->gart.ptr);
-	if (r)
-		return r;
+	return amdgpu_gart_map(adev, offset, pages, dma_addr, flags,
+			       adev->gart.ptr);
+}
+
+/**
+ * amdgpu_gart_invalidate_tlb - invalidate gart TLB
+ *
+ * @adev: amdgpu device driver pointer
+ *
+ * Invalidate gart TLB which can be use as a way to flush gart changes
+ *
+ */
+void amdgpu_gart_invalidate_tlb(struct amdgpu_device *adev)
+{
+	int i;
 
 	mb();
 	amdgpu_asic_flush_hdp(adev, NULL);
 	for (i = 0; i < adev->num_vmhubs; i++)
 		amdgpu_gmc_flush_gpu_tlb(adev, 0, i, 0);
-	return 0;
 }
 
 /**

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

@@ -66,5 +66,5 @@ int amdgpu_gart_map(struct amdgpu_device *adev, uint64_t offset,
 int amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t offset,
 		     int pages, struct page **pagelist,
 		     dma_addr_t *dma_addr, uint64_t flags);
-
+void amdgpu_gart_invalidate_tlb(struct amdgpu_device *adev);
 #endif

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

@@ -206,10 +206,12 @@ uint64_t amdgpu_gtt_mgr_usage(struct ttm_resource_manager *man)
 int amdgpu_gtt_mgr_recover(struct ttm_resource_manager *man)
 {
 	struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
+	struct amdgpu_device *adev;
 	struct amdgpu_gtt_node *node;
 	struct drm_mm_node *mm_node;
 	int r = 0;
 
+	adev = container_of(mgr, typeof(*adev), mman.gtt_mgr);
 	spin_lock(&mgr->lock);
 	drm_mm_for_each_node(mm_node, &mgr->mm) {
 		node = container_of(mm_node, struct amdgpu_gtt_node, node);
@@ -219,6 +221,8 @@ int amdgpu_gtt_mgr_recover(struct ttm_resource_manager *man)
 	}
 	spin_unlock(&mgr->lock);
 
+	amdgpu_gart_invalidate_tlb(adev);
+
 	return r;
 }
 

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

@@ -1012,6 +1012,7 @@ int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
 			return r;
 		}
 
+		amdgpu_gart_invalidate_tlb(adev);
 		ttm_resource_free(bo, &bo->mem);
 		bo->mem = tmp;
 	}