778 static struct sg_table * __map_dma_buf(struct dma_buf_attachment *attach,  in __map_dma_buf()  argument
784 	sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);  in __map_dma_buf()
788 	if (!dma_buf_attachment_is_dynamic(attach)) {  in __map_dma_buf()
789 		ret = dma_resv_wait_timeout(attach->dmabuf->resv,  in __map_dma_buf()
793 			attach->dmabuf->ops->unmap_dma_buf(attach, sg_table,  in __map_dma_buf()
844  *     - &dma_buf_ops.attach()
869  * @dmabuf:		[in]	buffer to attach device to.
877  * Optionally this calls &dma_buf_ops.attach to allow device-specific attach
894 	struct dma_buf_attachment *attach;  in dma_buf_dynamic_attach()  local
903 	attach = kzalloc(sizeof(*attach), GFP_KERNEL);  in dma_buf_dynamic_attach()
904 	if (!attach)  in dma_buf_dynamic_attach()
907 	attach->dev = dev;  in dma_buf_dynamic_attach()
908 	attach->dmabuf = dmabuf;  in dma_buf_dynamic_attach()
910 		attach->peer2peer = importer_ops->allow_peer2peer;  in dma_buf_dynamic_attach()
911 	attach->importer_ops = importer_ops;  in dma_buf_dynamic_attach()
912 	attach->importer_priv = importer_priv;  in dma_buf_dynamic_attach()
914 	if (dmabuf->ops->attach) {  in dma_buf_dynamic_attach()
915 		ret = dmabuf->ops->attach(dmabuf, attach);  in dma_buf_dynamic_attach()
920 	list_add(&attach->node, &dmabuf->attachments);  in dma_buf_dynamic_attach()
927 	if (dma_buf_attachment_is_dynamic(attach) !=  in dma_buf_dynamic_attach()
931 		dma_resv_lock(attach->dmabuf->resv, NULL);  in dma_buf_dynamic_attach()
932 		if (dma_buf_is_dynamic(attach->dmabuf)) {  in dma_buf_dynamic_attach()
933 			ret = dmabuf->ops->pin(attach);  in dma_buf_dynamic_attach()
938 		sgt = __map_dma_buf(attach, DMA_BIDIRECTIONAL);  in dma_buf_dynamic_attach()
945 		dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_dynamic_attach()
946 		attach->sgt = sgt;  in dma_buf_dynamic_attach()
947 		attach->dir = DMA_BIDIRECTIONAL;  in dma_buf_dynamic_attach()
950 	return attach;  in dma_buf_dynamic_attach()
953 	kfree(attach);  in dma_buf_dynamic_attach()
957 	if (dma_buf_is_dynamic(attach->dmabuf))  in dma_buf_dynamic_attach()
958 		dmabuf->ops->unpin(attach);  in dma_buf_dynamic_attach()
961 	dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_dynamic_attach()
963 	dma_buf_detach(dmabuf, attach);  in dma_buf_dynamic_attach()
970  * @dmabuf:	[in]	buffer to attach device to.
983 static void __unmap_dma_buf(struct dma_buf_attachment *attach,  in __unmap_dma_buf()  argument
990 	attach->dmabuf->ops->unmap_dma_buf(attach, sg_table, direction);  in __unmap_dma_buf()
996  * @attach:	[in]	attachment to be detached; is free'd after this call.
1002 void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)  in dma_buf_detach()  argument
1004 	if (WARN_ON(!dmabuf || !attach || dmabuf != attach->dmabuf))  in dma_buf_detach()
1009 	if (attach->sgt) {  in dma_buf_detach()
1011 		__unmap_dma_buf(attach, attach->sgt, attach->dir);  in dma_buf_detach()
1013 		if (dma_buf_is_dynamic(attach->dmabuf))  in dma_buf_detach()
1014 			dmabuf->ops->unpin(attach);  in dma_buf_detach()
1016 	list_del(&attach->node);  in dma_buf_detach()
1021 		dmabuf->ops->detach(dmabuf, attach);  in dma_buf_detach()
1023 	kfree(attach);  in dma_buf_detach()
1029  * @attach:	[in]	attachment which should be pinned
1031  * Only dynamic importers (who set up @attach with dma_buf_dynamic_attach()) may
1041 int dma_buf_pin(struct dma_buf_attachment *attach)  in dma_buf_pin()  argument
1043 	struct dma_buf *dmabuf = attach->dmabuf;  in dma_buf_pin()
1046 	WARN_ON(!dma_buf_attachment_is_dynamic(attach));  in dma_buf_pin()
1051 		ret = dmabuf->ops->pin(attach);  in dma_buf_pin()
1059  * @attach:	[in]	attachment which should be unpinned
1062  * any mapping of @attach again and inform the importer through
1065 void dma_buf_unpin(struct dma_buf_attachment *attach)  in dma_buf_unpin()  argument
1067 	struct dma_buf *dmabuf = attach->dmabuf;  in dma_buf_unpin()
1069 	WARN_ON(!dma_buf_attachment_is_dynamic(attach));  in dma_buf_unpin()
1074 		dmabuf->ops->unpin(attach);  in dma_buf_unpin()
1082  * @attach:	[in]	attachment whose scatterlist is to be returned
1099 struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,  in dma_buf_map_attachment()  argument
1107 	if (WARN_ON(!attach || !attach->dmabuf))  in dma_buf_map_attachment()
1110 	dma_resv_assert_held(attach->dmabuf->resv);  in dma_buf_map_attachment()
1112 	if (attach->sgt) {  in dma_buf_map_attachment()
1117 		if (attach->dir != direction &&  in dma_buf_map_attachment()
1118 		    attach->dir != DMA_BIDIRECTIONAL)  in dma_buf_map_attachment()
1121 		return attach->sgt;  in dma_buf_map_attachment()
1124 	if (dma_buf_is_dynamic(attach->dmabuf)) {  in dma_buf_map_attachment()
1126 			r = attach->dmabuf->ops->pin(attach);  in dma_buf_map_attachment()
1132 	sg_table = __map_dma_buf(attach, direction);  in dma_buf_map_attachment()
1136 	if (IS_ERR(sg_table) && dma_buf_is_dynamic(attach->dmabuf) &&  in dma_buf_map_attachment()
1138 		attach->dmabuf->ops->unpin(attach);  in dma_buf_map_attachment()
1140 	if (!IS_ERR(sg_table) && attach->dmabuf->ops->cache_sgt_mapping) {  in dma_buf_map_attachment()
1141 		attach->sgt = sg_table;  in dma_buf_map_attachment()
1142 		attach->dir = direction;  in dma_buf_map_attachment()
1170  * @attach:	[in]	attachment whose scatterlist is to be returned
1176 dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach,  in dma_buf_map_attachment_unlocked()  argument
1183 	if (WARN_ON(!attach || !attach->dmabuf))  in dma_buf_map_attachment_unlocked()
1186 	dma_resv_lock(attach->dmabuf->resv, NULL);  in dma_buf_map_attachment_unlocked()
1187 	sg_table = dma_buf_map_attachment(attach, direction);  in dma_buf_map_attachment_unlocked()
1188 	dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_map_attachment_unlocked()
1198  * @attach:	[in]	attachment to unmap buffer from
1204 void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,  in dma_buf_unmap_attachment()  argument
1210 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))  in dma_buf_unmap_attachment()
1213 	dma_resv_assert_held(attach->dmabuf->resv);  in dma_buf_unmap_attachment()
1215 	if (attach->sgt == sg_table)  in dma_buf_unmap_attachment()
1218 	__unmap_dma_buf(attach, sg_table, direction);  in dma_buf_unmap_attachment()
1220 	if (dma_buf_is_dynamic(attach->dmabuf) &&  in dma_buf_unmap_attachment()
1222 		dma_buf_unpin(attach);  in dma_buf_unmap_attachment()
1230  * @attach:	[in]	attachment to unmap buffer from
1236 void dma_buf_unmap_attachment_unlocked(struct dma_buf_attachment *attach,  in dma_buf_unmap_attachment_unlocked()  argument
1242 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))  in dma_buf_unmap_attachment_unlocked()
1245 	dma_resv_lock(attach->dmabuf->resv, NULL);  in dma_buf_unmap_attachment_unlocked()
1246 	dma_buf_unmap_attachment(attach, sg_table, direction);  in dma_buf_unmap_attachment_unlocked()
1247 	dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_unmap_attachment_unlocked()
1261 	struct dma_buf_attachment *attach;  in dma_buf_move_notify()  local
1265 	list_for_each_entry(attach, &dmabuf->attachments, node)  in dma_buf_move_notify()
1266 		if (attach->importer_ops)  in dma_buf_move_notify()
1267 			attach->importer_ops->move_notify(attach);  in dma_buf_move_notify()