drm/amdgpu: put VM page tables directly into duplicates list

BugLink: http://bugs.launchpad.net/bugs/1546572

They share the reservation object with the page directory anyway.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
(cherry picked from commit 3c0eea6c)
Signed-off-by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

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

@@ -981,7 +981,8 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm);
 void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
 struct amdgpu_bo_list_entry *amdgpu_vm_get_bos(struct amdgpu_device *adev,
 					       struct amdgpu_vm *vm,
-					       struct list_head *head);
+					       struct list_head *validated,
+					       struct list_head *duplicates);
 int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
 		      struct amdgpu_sync *sync);
 void amdgpu_vm_flush(struct amdgpu_ring *ring,

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

@@ -406,8 +406,9 @@ static int amdgpu_cs_parser_relocs(struct amdgpu_cs_parser *p)
 		amdgpu_cs_buckets_get_list(&buckets, &p->validated);
 	}
 
+	INIT_LIST_HEAD(&duplicates);
 	p->vm_bos = amdgpu_vm_get_bos(p->adev, &fpriv->vm,
-				      &p->validated);
+				      &p->validated, &duplicates);
 
 	if (p->uf.bo)
 		list_add(&p->uf_entry.tv.head, &p->validated);
@@ -415,7 +416,6 @@ static int amdgpu_cs_parser_relocs(struct amdgpu_cs_parser *p)
 	if (need_mmap_lock)
 		down_read(&current->mm->mmap_sem);
 
-	INIT_LIST_HEAD(&duplicates);
 	r = ttm_eu_reserve_buffers(&p->ticket, &p->validated, true, &duplicates);
 	if (unlikely(r != 0))
 		goto error_reserve;

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

@@ -461,7 +461,7 @@ static void amdgpu_gem_va_update_vm(struct amdgpu_device *adev,
 	tv.shared = true;
 	list_add(&tv.head, &list);
 
-	vm_bos = amdgpu_vm_get_bos(adev, bo_va->vm, &list);
+	vm_bos = amdgpu_vm_get_bos(adev, bo_va->vm, &list, &duplicates);
 	if (!vm_bos)
 		return;
 

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

@@ -78,14 +78,16 @@ static unsigned amdgpu_vm_directory_size(struct amdgpu_device *adev)
  * amdgpu_vm_get_bos - add the vm BOs to a validation list
  *
  * @vm: vm providing the BOs
- * @head: head of validation list
+ * @validated: head of validation list
+ * @duplicates: head of duplicates list
  *
  * Add the page directory to the list of BOs to
  * validate for command submission (cayman+).
  */
 struct amdgpu_bo_list_entry *amdgpu_vm_get_bos(struct amdgpu_device *adev,
-					  struct amdgpu_vm *vm,
-					  struct list_head *head)
+					       struct amdgpu_vm *vm,
+					       struct list_head *validated,
+					       struct list_head *duplicates)
 {
 	struct amdgpu_bo_list_entry *list;
 	unsigned i, idx;
@@ -103,7 +105,7 @@ struct amdgpu_bo_list_entry *amdgpu_vm_get_bos(struct amdgpu_device *adev,
 	list[0].priority = 0;
 	list[0].tv.bo = &vm->page_directory->tbo;
 	list[0].tv.shared = true;
-	list_add(&list[0].tv.head, head);
+	list_add(&list[0].tv.head, validated);
 
 	for (i = 0, idx = 1; i <= vm->max_pde_used; i++) {
 		if (!vm->page_tables[i].bo)
@@ -115,7 +117,7 @@ struct amdgpu_bo_list_entry *amdgpu_vm_get_bos(struct amdgpu_device *adev,
 		list[idx].priority = 0;
 		list[idx].tv.bo = &list[idx].robj->tbo;
 		list[idx].tv.shared = true;
-		list_add(&list[idx++].tv.head, head);
+		list_add(&list[idx++].tv.head, duplicates);
 	}
 
 	return list;