diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
index 7c3da4e3e737..d600cf7ceb35 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
@@ -485,6 +485,7 @@ struct drm_i915_gem_object {
 		 */
 		struct list_head region_link;
 
+		struct i915_refct_sgt *rsgt;
 		struct sg_table *pages;
 		void *mapping;
 
@@ -538,7 +539,7 @@ struct drm_i915_gem_object {
 	} mm;
 
 	struct {
-		struct sg_table *cached_io_st;
+		struct i915_refct_sgt *cached_io_rsgt;
 		struct i915_gem_object_page_iter get_io_page;
 		struct drm_i915_gem_object *backup;
 		bool created:1;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index 74a1ffd0d7dd..4b4d7457bef9 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -34,7 +34,7 @@
  * struct i915_ttm_tt - TTM page vector with additional private information
  * @ttm: The base TTM page vector.
  * @dev: The struct device used for dma mapping and unmapping.
- * @cached_st: The cached scatter-gather table.
+ * @cached_rsgt: The cached scatter-gather table.
  *
  * Note that DMA may be going on right up to the point where the page-
  * vector is unpopulated in delayed destroy. Hence keep the
@@ -45,7 +45,7 @@
 struct i915_ttm_tt {
 	struct ttm_tt ttm;
 	struct device *dev;
-	struct sg_table *cached_st;
+	struct i915_refct_sgt cached_rsgt;
 };
 
 static const struct ttm_place sys_placement_flags = {
@@ -179,6 +179,21 @@ i915_ttm_placement_from_obj(const struct drm_i915_gem_object *obj,
 	placement->busy_placement = busy;
 }
 
+static void i915_ttm_tt_release(struct kref *ref)
+{
+	struct i915_ttm_tt *i915_tt =
+		container_of(ref, typeof(*i915_tt), cached_rsgt.kref);
+	struct sg_table *st = &i915_tt->cached_rsgt.table;
+
+	GEM_WARN_ON(st->sgl);
+
+	kfree(i915_tt);
+}
+
+static const struct i915_refct_sgt_ops tt_rsgt_ops = {
+	.release = i915_ttm_tt_release
+};
+
 static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo,
 					 uint32_t page_flags)
 {
@@ -203,6 +218,8 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo,
 		return NULL;
 	}
 
+	i915_refct_sgt_init_ops(&i915_tt->cached_rsgt, bo->base.size,
+				&tt_rsgt_ops);
 	i915_tt->dev = obj->base.dev->dev;
 
 	return &i915_tt->ttm;
@@ -211,13 +228,13 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo,
 static void i915_ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
 {
 	struct i915_ttm_tt *i915_tt = container_of(ttm, typeof(*i915_tt), ttm);
+	struct sg_table *st = &i915_tt->cached_rsgt.table;
+
+	GEM_WARN_ON(kref_read(&i915_tt->cached_rsgt.kref) != 1);
 
-	if (i915_tt->cached_st) {
-		dma_unmap_sgtable(i915_tt->dev, i915_tt->cached_st,
-				  DMA_BIDIRECTIONAL, 0);
-		sg_free_table(i915_tt->cached_st);
-		kfree(i915_tt->cached_st);
-		i915_tt->cached_st = NULL;
+	if (st->sgl) {
+		dma_unmap_sgtable(i915_tt->dev, st, DMA_BIDIRECTIONAL, 0);
+		sg_free_table(st);
 	}
 	ttm_pool_free(&bdev->pool, ttm);
 }
@@ -226,8 +243,10 @@ static void i915_ttm_tt_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
 {
 	struct i915_ttm_tt *i915_tt = container_of(ttm, typeof(*i915_tt), ttm);
 
+	GEM_WARN_ON(kref_read(&i915_tt->cached_rsgt.kref) != 1);
+
 	ttm_tt_fini(ttm);
-	kfree(i915_tt);
+	i915_refct_sgt_put(&i915_tt->cached_rsgt);
 }
 
 static bool i915_ttm_eviction_valuable(struct ttm_buffer_object *bo,
@@ -261,12 +280,12 @@ static int i915_ttm_move_notify(struct ttm_buffer_object *bo)
 	return 0;
 }
 
-static void i915_ttm_free_cached_io_st(struct drm_i915_gem_object *obj)
+static void i915_ttm_free_cached_io_rsgt(struct drm_i915_gem_object *obj)
 {
 	struct radix_tree_iter iter;
 	void __rcu **slot;
 
-	if (!obj->ttm.cached_io_st)
+	if (!obj->ttm.cached_io_rsgt)
 		return;
 
 	rcu_read_lock();
@@ -274,9 +293,8 @@ static void i915_ttm_free_cached_io_st(struct drm_i915_gem_object *obj)
 		radix_tree_delete(&obj->ttm.get_io_page.radix, iter.index);
 	rcu_read_unlock();
 
-	sg_free_table(obj->ttm.cached_io_st);
-	kfree(obj->ttm.cached_io_st);
-	obj->ttm.cached_io_st = NULL;
+	i915_refct_sgt_put(obj->ttm.cached_io_rsgt);
+	obj->ttm.cached_io_rsgt = NULL;
 }
 
 static void
@@ -347,7 +365,7 @@ static void i915_ttm_purge(struct drm_i915_gem_object *obj)
 		obj->write_domain = 0;
 		obj->read_domains = 0;
 		i915_ttm_adjust_gem_after_move(obj);
-		i915_ttm_free_cached_io_st(obj);
+		i915_ttm_free_cached_io_rsgt(obj);
 		obj->mm.madv = __I915_MADV_PURGED;
 	}
 }
@@ -358,7 +376,7 @@ static void i915_ttm_swap_notify(struct ttm_buffer_object *bo)
 	int ret = i915_ttm_move_notify(bo);
 
 	GEM_WARN_ON(ret);
-	GEM_WARN_ON(obj->ttm.cached_io_st);
+	GEM_WARN_ON(obj->ttm.cached_io_rsgt);
 	if (!ret && obj->mm.madv != I915_MADV_WILLNEED)
 		i915_ttm_purge(obj);
 }
@@ -369,7 +387,7 @@ static void i915_ttm_delete_mem_notify(struct ttm_buffer_object *bo)
 
 	if (likely(obj)) {
 		__i915_gem_object_pages_fini(obj);
-		i915_ttm_free_cached_io_st(obj);
+		i915_ttm_free_cached_io_rsgt(obj);
 	}
 }
 
@@ -389,40 +407,35 @@ i915_ttm_region(struct ttm_device *bdev, int ttm_mem_type)
 					  ttm_mem_type - I915_PL_LMEM0);
 }
 
-static struct sg_table *i915_ttm_tt_get_st(struct ttm_tt *ttm)
+static struct i915_refct_sgt *i915_ttm_tt_get_st(struct ttm_tt *ttm)
 {
 	struct i915_ttm_tt *i915_tt = container_of(ttm, typeof(*i915_tt), ttm);
 	struct sg_table *st;
 	int ret;
 
-	if (i915_tt->cached_st)
-		return i915_tt->cached_st;
-
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (!st)
-		return ERR_PTR(-ENOMEM);
+	if (i915_tt->cached_rsgt.table.sgl)
+		return i915_refct_sgt_get(&i915_tt->cached_rsgt);
 
+	st = &i915_tt->cached_rsgt.table;
 	ret = sg_alloc_table_from_pages_segment(st,
 			ttm->pages, ttm->num_pages,
 			0, (unsigned long)ttm->num_pages << PAGE_SHIFT,
 			i915_sg_segment_size(), GFP_KERNEL);
 	if (ret) {
-		kfree(st);
+		st->sgl = NULL;
 		return ERR_PTR(ret);
 	}
 
 	ret = dma_map_sgtable(i915_tt->dev, st, DMA_BIDIRECTIONAL, 0);
 	if (ret) {
 		sg_free_table(st);
-		kfree(st);
 		return ERR_PTR(ret);
 	}
 
-	i915_tt->cached_st = st;
-	return st;
+	return i915_refct_sgt_get(&i915_tt->cached_rsgt);
 }
 
-static struct sg_table *
+static struct i915_refct_sgt *
 i915_ttm_resource_get_st(struct drm_i915_gem_object *obj,
 			 struct ttm_resource *res)
 {
@@ -436,7 +449,21 @@ i915_ttm_resource_get_st(struct drm_i915_gem_object *obj,
 	 * the resulting st. Might make sense for GGTT.
 	 */
 	GEM_WARN_ON(!cpu_maps_iomem(res));
-	return intel_region_ttm_resource_to_st(obj->mm.region, res);
+	if (bo->resource == res) {
+		if (!obj->ttm.cached_io_rsgt) {
+			struct i915_refct_sgt *rsgt;
+
+			rsgt = intel_region_ttm_resource_to_rsgt(obj->mm.region,
+								 res);
+			if (IS_ERR(rsgt))
+				return rsgt;
+
+			obj->ttm.cached_io_rsgt = rsgt;
+		}
+		return i915_refct_sgt_get(obj->ttm.cached_io_rsgt);
+	}
+
+	return intel_region_ttm_resource_to_rsgt(obj->mm.region, res);
 }
 
 static int i915_ttm_accel_move(struct ttm_buffer_object *bo,
@@ -447,10 +474,7 @@ static int i915_ttm_accel_move(struct ttm_buffer_object *bo,
 {
 	struct drm_i915_private *i915 = container_of(bo->bdev, typeof(*i915),
 						     bdev);
-	struct ttm_resource_manager *src_man =
-		ttm_manager_type(bo->bdev, bo->resource->mem_type);
 	struct drm_i915_gem_object *obj = i915_ttm_to_gem(bo);
-	struct sg_table *src_st;
 	struct i915_request *rq;
 	struct ttm_tt *src_ttm = bo->ttm;
 	enum i915_cache_level src_level, dst_level;
@@ -476,17 +500,22 @@ static int i915_ttm_accel_move(struct ttm_buffer_object *bo,
 		}
 		intel_engine_pm_put(i915->gt.migrate.context->engine);
 	} else {
-		src_st = src_man->use_tt ? i915_ttm_tt_get_st(src_ttm) :
-			obj->ttm.cached_io_st;
+		struct i915_refct_sgt *src_rsgt =
+			i915_ttm_resource_get_st(obj, bo->resource);
+
+		if (IS_ERR(src_rsgt))
+			return PTR_ERR(src_rsgt);
 
 		src_level = i915_ttm_cache_level(i915, bo->resource, src_ttm);
 		intel_engine_pm_get(i915->gt.migrate.context->engine);
 		ret = intel_context_migrate_copy(i915->gt.migrate.context,
-						 NULL, src_st->sgl, src_level,
+						 NULL, src_rsgt->table.sgl,
+						 src_level,
 						 gpu_binds_iomem(bo->resource),
 						 dst_st->sgl, dst_level,
 						 gpu_binds_iomem(dst_mem),
 						 &rq);
+		i915_refct_sgt_put(src_rsgt);
 		if (!ret && rq) {
 			i915_request_wait(rq, 0, MAX_SCHEDULE_TIMEOUT);
 			i915_request_put(rq);
@@ -500,13 +529,14 @@ static int i915_ttm_accel_move(struct ttm_buffer_object *bo,
 static void __i915_ttm_move(struct ttm_buffer_object *bo, bool clear,
 			    struct ttm_resource *dst_mem,
 			    struct ttm_tt *dst_ttm,
-			    struct sg_table *dst_st,
+			    struct i915_refct_sgt *dst_rsgt,
 			    bool allow_accel)
 {
 	int ret = -EINVAL;
 
 	if (allow_accel)
-		ret = i915_ttm_accel_move(bo, clear, dst_mem, dst_ttm, dst_st);
+		ret = i915_ttm_accel_move(bo, clear, dst_mem, dst_ttm,
+					  &dst_rsgt->table);
 	if (ret) {
 		struct drm_i915_gem_object *obj = i915_ttm_to_gem(bo);
 		struct intel_memory_region *dst_reg, *src_reg;
@@ -523,12 +553,13 @@ static void __i915_ttm_move(struct ttm_buffer_object *bo, bool clear,
 		dst_iter = !cpu_maps_iomem(dst_mem) ?
 			ttm_kmap_iter_tt_init(&_dst_iter.tt, dst_ttm) :
 			ttm_kmap_iter_iomap_init(&_dst_iter.io, &dst_reg->iomap,
-						 dst_st, dst_reg->region.start);
+						 &dst_rsgt->table,
+						 dst_reg->region.start);
 
 		src_iter = !cpu_maps_iomem(bo->resource) ?
 			ttm_kmap_iter_tt_init(&_src_iter.tt, bo->ttm) :
 			ttm_kmap_iter_iomap_init(&_src_iter.io, &src_reg->iomap,
-						 obj->ttm.cached_io_st,
+						 &obj->ttm.cached_io_rsgt->table,
 						 src_reg->region.start);
 
 		ttm_move_memcpy(clear, dst_mem->num_pages, dst_iter, src_iter);
@@ -544,7 +575,7 @@ static int i915_ttm_move(struct ttm_buffer_object *bo, bool evict,
 	struct ttm_resource_manager *dst_man =
 		ttm_manager_type(bo->bdev, dst_mem->mem_type);
 	struct ttm_tt *ttm = bo->ttm;
-	struct sg_table *dst_st;
+	struct i915_refct_sgt *dst_rsgt;
 	bool clear;
 	int ret;
 
@@ -570,22 +601,24 @@ static int i915_ttm_move(struct ttm_buffer_object *bo, bool evict,
 			return ret;
 	}
 
-	dst_st = i915_ttm_resource_get_st(obj, dst_mem);
-	if (IS_ERR(dst_st))
-		return PTR_ERR(dst_st);
+	dst_rsgt = i915_ttm_resource_get_st(obj, dst_mem);
+	if (IS_ERR(dst_rsgt))
+		return PTR_ERR(dst_rsgt);
 
 	clear = !cpu_maps_iomem(bo->resource) && (!ttm || !ttm_tt_is_populated(ttm));
 	if (!(clear && ttm && !(ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC)))
-		__i915_ttm_move(bo, clear, dst_mem, bo->ttm, dst_st, true);
+		__i915_ttm_move(bo, clear, dst_mem, bo->ttm, dst_rsgt, true);
 
 	ttm_bo_move_sync_cleanup(bo, dst_mem);
 	i915_ttm_adjust_domains_after_move(obj);
-	i915_ttm_free_cached_io_st(obj);
+	i915_ttm_free_cached_io_rsgt(obj);
 
 	if (gpu_binds_iomem(dst_mem) || cpu_maps_iomem(dst_mem)) {
-		obj->ttm.cached_io_st = dst_st;
-		obj->ttm.get_io_page.sg_pos = dst_st->sgl;
+		obj->ttm.cached_io_rsgt = dst_rsgt;
+		obj->ttm.get_io_page.sg_pos = dst_rsgt->table.sgl;
 		obj->ttm.get_io_page.sg_idx = 0;
+	} else {
+		i915_refct_sgt_put(dst_rsgt);
 	}
 
 	i915_ttm_adjust_gem_after_move(obj);
@@ -649,7 +682,6 @@ static int __i915_ttm_get_pages(struct drm_i915_gem_object *obj,
 		.interruptible = true,
 		.no_wait_gpu = false,
 	};
-	struct sg_table *st;
 	int real_num_busy;
 	int ret;
 
@@ -687,12 +719,16 @@ static int __i915_ttm_get_pages(struct drm_i915_gem_object *obj,
 	}
 
 	if (!i915_gem_object_has_pages(obj)) {
-		/* Object either has a page vector or is an iomem object */
-		st = bo->ttm ? i915_ttm_tt_get_st(bo->ttm) : obj->ttm.cached_io_st;
-		if (IS_ERR(st))
-			return PTR_ERR(st);
+		struct i915_refct_sgt *rsgt =
+			i915_ttm_resource_get_st(obj, bo->resource);
+
+		if (IS_ERR(rsgt))
+			return PTR_ERR(rsgt);
 
-		__i915_gem_object_set_pages(obj, st, i915_sg_dma_sizes(st->sgl));
+		GEM_BUG_ON(obj->mm.rsgt);
+		obj->mm.rsgt = rsgt;
+		__i915_gem_object_set_pages(obj, &rsgt->table,
+					    i915_sg_dma_sizes(rsgt->table.sgl));
 	}
 
 	return ret;
@@ -766,6 +802,11 @@ static void i915_ttm_put_pages(struct drm_i915_gem_object *obj,
 	 * and shrinkers will move it out if needed.
 	 */
 
+	if (obj->mm.rsgt) {
+		i915_refct_sgt_put(obj->mm.rsgt);
+		obj->mm.rsgt = NULL;
+	}
+
 	i915_ttm_adjust_lru(obj);
 }
 
@@ -1023,7 +1064,7 @@ int i915_gem_obj_copy_ttm(struct drm_i915_gem_object *dst,
 	struct ttm_operation_ctx ctx = {
 		.interruptible = intr,
 	};
-	struct sg_table *dst_st;
+	struct i915_refct_sgt *dst_rsgt;
 	int ret;
 
 	assert_object_held(dst);
@@ -1038,11 +1079,11 @@ int i915_gem_obj_copy_ttm(struct drm_i915_gem_object *dst,
 	if (ret)
 		return ret;
 
-	dst_st = gpu_binds_iomem(dst_bo->resource) ?
-		dst->ttm.cached_io_st : i915_ttm_tt_get_st(dst_bo->ttm);
-
+	dst_rsgt = i915_ttm_resource_get_st(dst, dst_bo->resource);
 	__i915_ttm_move(src_bo, false, dst_bo->resource, dst_bo->ttm,
-			dst_st, allow_accel);
+			dst_rsgt, allow_accel);
+
+	i915_refct_sgt_put(dst_rsgt);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/i915_scatterlist.c b/drivers/gpu/drm/i915/i915_scatterlist.c
index 4a6712dca838..8a510ee5d1ad 100644
--- a/drivers/gpu/drm/i915/i915_scatterlist.c
+++ b/drivers/gpu/drm/i915/i915_scatterlist.c
@@ -41,8 +41,32 @@ bool i915_sg_trim(struct sg_table *orig_st)
 	return true;
 }
 
+static void i915_refct_sgt_release(struct kref *ref)
+{
+	struct i915_refct_sgt *rsgt =
+		container_of(ref, typeof(*rsgt), kref);
+
+	sg_free_table(&rsgt->table);
+	kfree(rsgt);
+}
+
+static const struct i915_refct_sgt_ops rsgt_ops = {
+	.release = i915_refct_sgt_release
+};
+
+/**
+ * i915_refct_sgt_init - Initialize a struct i915_refct_sgt with default ops
+ * @rsgt: The struct i915_refct_sgt to initialize.
+ * size: The size of the underlying memory buffer.
+ */
+void i915_refct_sgt_init(struct i915_refct_sgt *rsgt, size_t size)
+{
+	i915_refct_sgt_init_ops(rsgt, size, &rsgt_ops);
+}
+
 /**
- * i915_sg_from_mm_node - Create an sg_table from a struct drm_mm_node
+ * i915_rsgt_from_mm_node - Create a refcounted sg_table from a struct
+ * drm_mm_node
  * @node: The drm_mm_node.
  * @region_start: An offset to add to the dma addresses of the sg list.
  *
@@ -50,25 +74,28 @@ bool i915_sg_trim(struct sg_table *orig_st)
  * taking a maximum segment length into account, splitting into segments
  * if necessary.
  *
- * Return: A pointer to a kmalloced struct sg_table on success, negative
+ * Return: A pointer to a kmalloced struct i915_refct_sgt on success, negative
  * error code cast to an error pointer on failure.
  */
-struct sg_table *i915_sg_from_mm_node(const struct drm_mm_node *node,
-				      u64 region_start)
+struct i915_refct_sgt *i915_rsgt_from_mm_node(const struct drm_mm_node *node,
+					      u64 region_start)
 {
 	const u64 max_segment = SZ_1G; /* Do we have a limit on this? */
 	u64 segment_pages = max_segment >> PAGE_SHIFT;
 	u64 block_size, offset, prev_end;
+	struct i915_refct_sgt *rsgt;
 	struct sg_table *st;
 	struct scatterlist *sg;
 
-	st = kmalloc(sizeof(*st), GFP_KERNEL);
-	if (!st)
+	rsgt = kmalloc(sizeof(*rsgt), GFP_KERNEL);
+	if (!rsgt)
 		return ERR_PTR(-ENOMEM);
 
+	i915_refct_sgt_init(rsgt, node->size << PAGE_SHIFT);
+	st = &rsgt->table;
 	if (sg_alloc_table(st, DIV_ROUND_UP(node->size, segment_pages),
 			   GFP_KERNEL)) {
-		kfree(st);
+		i915_refct_sgt_put(rsgt);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -104,11 +131,11 @@ struct sg_table *i915_sg_from_mm_node(const struct drm_mm_node *node,
 	sg_mark_end(sg);
 	i915_sg_trim(st);
 
-	return st;
+	return rsgt;
 }
 
 /**
- * i915_sg_from_buddy_resource - Create an sg_table from a struct
+ * i915_rsgt_from_buddy_resource - Create a refcounted sg_table from a struct
  * i915_buddy_block list
  * @res: The struct i915_ttm_buddy_resource.
  * @region_start: An offset to add to the dma addresses of the sg list.
@@ -117,11 +144,11 @@ struct sg_table *i915_sg_from_mm_node(const struct drm_mm_node *node,
  * taking a maximum segment length into account, splitting into segments
  * if necessary.
  *
- * Return: A pointer to a kmalloced struct sg_table on success, negative
+ * Return: A pointer to a kmalloced struct i915_refct_sgts on success, negative
  * error code cast to an error pointer on failure.
  */
-struct sg_table *i915_sg_from_buddy_resource(struct ttm_resource *res,
-					     u64 region_start)
+struct i915_refct_sgt *i915_rsgt_from_buddy_resource(struct ttm_resource *res,
+						     u64 region_start)
 {
 	struct i915_ttm_buddy_resource *bman_res = to_ttm_buddy_resource(res);
 	const u64 size = res->num_pages << PAGE_SHIFT;
@@ -129,18 +156,21 @@ struct sg_table *i915_sg_from_buddy_resource(struct ttm_resource *res,
 	struct i915_buddy_mm *mm = bman_res->mm;
 	struct list_head *blocks = &bman_res->blocks;
 	struct i915_buddy_block *block;
+	struct i915_refct_sgt *rsgt;
 	struct scatterlist *sg;
 	struct sg_table *st;
 	resource_size_t prev_end;
 
 	GEM_BUG_ON(list_empty(blocks));
 
-	st = kmalloc(sizeof(*st), GFP_KERNEL);
-	if (!st)
+	rsgt = kmalloc(sizeof(*rsgt), GFP_KERNEL);
+	if (!rsgt)
 		return ERR_PTR(-ENOMEM);
 
+	i915_refct_sgt_init(rsgt, size);
+	st = &rsgt->table;
 	if (sg_alloc_table(st, res->num_pages, GFP_KERNEL)) {
-		kfree(st);
+		i915_refct_sgt_put(rsgt);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -181,7 +211,7 @@ struct sg_table *i915_sg_from_buddy_resource(struct ttm_resource *res,
 	sg_mark_end(sg);
 	i915_sg_trim(st);
 
-	return st;
+	return rsgt;
 }
 
 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
diff --git a/drivers/gpu/drm/i915/i915_scatterlist.h b/drivers/gpu/drm/i915/i915_scatterlist.h
index b8bd5925b03f..321fd4a9f777 100644
--- a/drivers/gpu/drm/i915/i915_scatterlist.h
+++ b/drivers/gpu/drm/i915/i915_scatterlist.h
@@ -144,10 +144,78 @@ static inline unsigned int i915_sg_segment_size(void)
 
 bool i915_sg_trim(struct sg_table *orig_st);
 
-struct sg_table *i915_sg_from_mm_node(const struct drm_mm_node *node,
-				      u64 region_start);
+/**
+ * struct i915_refct_sgt_ops - Operations structure for struct i915_refct_sgt
+ */
+struct i915_refct_sgt_ops {
+	/**
+	 * release() - Free the memory of the struct i915_refct_sgt
+	 * @ref: struct kref that is embedded in the struct i915_refct_sgt
+	 */
+	void (*release)(struct kref *ref);
+};
+
+/**
+ * struct i915_refct_sgt - A refcounted scatter-gather table
+ * @kref: struct kref for refcounting
+ * @table: struct sg_table holding the scatter-gather table itself. Note that
+ * @table->sgl = NULL can be used to determine whether a scatter-gather table
+ * is present or not.
+ * @size: The size in bytes of the underlying memory buffer
+ * @ops: The operations structure.
+ */
+struct i915_refct_sgt {
+	struct kref kref;
+	struct sg_table table;
+	size_t size;
+	const struct i915_refct_sgt_ops *ops;
+};
+
+/**
+ * i915_refct_sgt_put - Put a refcounted sg-table
+ * @rsgt the struct i915_refct_sgt to put.
+ */
+static inline void i915_refct_sgt_put(struct i915_refct_sgt *rsgt)
+{
+	if (rsgt)
+		kref_put(&rsgt->kref, rsgt->ops->release);
+}
+
+/**
+ * i915_refct_sgt_get - Get a refcounted sg-table
+ * @rsgt the struct i915_refct_sgt to get.
+ */
+static inline struct i915_refct_sgt *
+i915_refct_sgt_get(struct i915_refct_sgt *rsgt)
+{
+	kref_get(&rsgt->kref);
+	return rsgt;
+}
+
+/**
+ * i915_refct_sgt_init_ops - Initialize a refcounted sg-list with a custom
+ * operations structure
+ * @rsgt The struct i915_refct_sgt to initialize.
+ * @size: Size in bytes of the underlying memory buffer.
+ * @ops: A customized operations structure in case the refcounted sg-list
+ * is embedded into another structure.
+ */
+static inline void i915_refct_sgt_init_ops(struct i915_refct_sgt *rsgt,
+					   size_t size,
+					   const struct i915_refct_sgt_ops *ops)
+{
+	kref_init(&rsgt->kref);
+	rsgt->table.sgl = NULL;
+	rsgt->size = size;
+	rsgt->ops = ops;
+}
+
+void i915_refct_sgt_init(struct i915_refct_sgt *rsgt, size_t size);
+
+struct i915_refct_sgt *i915_rsgt_from_mm_node(const struct drm_mm_node *node,
+					      u64 region_start);
 
-struct sg_table *i915_sg_from_buddy_resource(struct ttm_resource *res,
-					     u64 region_start);
+struct i915_refct_sgt *i915_rsgt_from_buddy_resource(struct ttm_resource *res,
+						     u64 region_start);
 
 #endif
diff --git a/drivers/gpu/drm/i915/intel_region_ttm.c b/drivers/gpu/drm/i915/intel_region_ttm.c
index 98c7339bf8ba..2e901a27e259 100644
--- a/drivers/gpu/drm/i915/intel_region_ttm.c
+++ b/drivers/gpu/drm/i915/intel_region_ttm.c
@@ -115,8 +115,8 @@ void intel_region_ttm_fini(struct intel_memory_region *mem)
 }
 
 /**
- * intel_region_ttm_resource_to_st - Convert an opaque TTM resource manager resource
- * to an sg_table.
+ * intel_region_ttm_resource_to_rsgt -
+ * Convert an opaque TTM resource manager resource to a refcounted sg_table.
  * @mem: The memory region.
  * @res: The resource manager resource obtained from the TTM resource manager.
  *
@@ -126,17 +126,18 @@ void intel_region_ttm_fini(struct intel_memory_region *mem)
  *
  * Return: A malloced sg_table on success, an error pointer on failure.
  */
-struct sg_table *intel_region_ttm_resource_to_st(struct intel_memory_region *mem,
-						 struct ttm_resource *res)
+struct i915_refct_sgt *
+intel_region_ttm_resource_to_rsgt(struct intel_memory_region *mem,
+				  struct ttm_resource *res)
 {
 	if (mem->is_range_manager) {
 		struct ttm_range_mgr_node *range_node =
 			to_ttm_range_mgr_node(res);
 
-		return i915_sg_from_mm_node(&range_node->mm_nodes[0],
-					    mem->region.start);
+		return i915_rsgt_from_mm_node(&range_node->mm_nodes[0],
+					      mem->region.start);
 	} else {
-		return i915_sg_from_buddy_resource(res, mem->region.start);
+		return i915_rsgt_from_buddy_resource(res, mem->region.start);
 	}
 }
 
diff --git a/drivers/gpu/drm/i915/intel_region_ttm.h b/drivers/gpu/drm/i915/intel_region_ttm.h
index 6f44075920f2..7bbe2b46b504 100644
--- a/drivers/gpu/drm/i915/intel_region_ttm.h
+++ b/drivers/gpu/drm/i915/intel_region_ttm.h
@@ -22,8 +22,9 @@ int intel_region_ttm_init(struct intel_memory_region *mem);
 
 void intel_region_ttm_fini(struct intel_memory_region *mem);
 
-struct sg_table *intel_region_ttm_resource_to_st(struct intel_memory_region *mem,
-						 struct ttm_resource *res);
+struct i915_refct_sgt *
+intel_region_ttm_resource_to_rsgt(struct intel_memory_region *mem,
+				  struct ttm_resource *res);
 
 void intel_region_ttm_resource_free(struct intel_memory_region *mem,
 				    struct ttm_resource *res);
diff --git a/drivers/gpu/drm/i915/selftests/mock_region.c b/drivers/gpu/drm/i915/selftests/mock_region.c
index efa86dffe3c6..2752b5b98f60 100644
--- a/drivers/gpu/drm/i915/selftests/mock_region.c
+++ b/drivers/gpu/drm/i915/selftests/mock_region.c
@@ -17,9 +17,9 @@
 static void mock_region_put_pages(struct drm_i915_gem_object *obj,
 				  struct sg_table *pages)
 {
+	i915_refct_sgt_put(obj->mm.rsgt);
+	obj->mm.rsgt = NULL;
 	intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);
-	sg_free_table(pages);
-	kfree(pages);
 }
 
 static int mock_region_get_pages(struct drm_i915_gem_object *obj)
@@ -38,12 +38,14 @@ static int mock_region_get_pages(struct drm_i915_gem_object *obj)
 	if (IS_ERR(obj->mm.res))
 		return PTR_ERR(obj->mm.res);
 
-	pages = intel_region_ttm_resource_to_st(obj->mm.region, obj->mm.res);
-	if (IS_ERR(pages)) {
-		err = PTR_ERR(pages);
+	obj->mm.rsgt = intel_region_ttm_resource_to_rsgt(obj->mm.region,
+							 obj->mm.res);
+	if (IS_ERR(obj->mm.rsgt)) {
+		err = PTR_ERR(obj->mm.rsgt);
 		goto err_free_resource;
 	}
 
+	pages = &obj->mm.rsgt->table;
 	__i915_gem_object_set_pages(obj, pages, i915_sg_dma_sizes(pages->sgl));
 
 	return 0;
