791 static struct sg_table * __map_dma_buf(struct dma_buf_attachment *attach,  in __map_dma_buf()  argument
797 	sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);  in __map_dma_buf()
801 	if (!dma_buf_attachment_is_dynamic(attach)) {  in __map_dma_buf()
802 		ret = dma_resv_wait_timeout(attach->dmabuf->resv,  in __map_dma_buf()
806 			attach->dmabuf->ops->unmap_dma_buf(attach, sg_table,  in __map_dma_buf()
857  *     - &dma_buf_ops.attach()
882  * @dmabuf:		[in]	buffer to attach device to.
890  * Optionally this calls &dma_buf_ops.attach to allow device-specific attach
907 	struct dma_buf_attachment *attach;  in dma_buf_dynamic_attach()  local
916 	attach = kzalloc(sizeof(*attach), GFP_KERNEL);  in dma_buf_dynamic_attach()
917 	if (!attach)  in dma_buf_dynamic_attach()
920 	attach->dev = dev;  in dma_buf_dynamic_attach()
921 	attach->dmabuf = dmabuf;  in dma_buf_dynamic_attach()
923 		attach->peer2peer = importer_ops->allow_peer2peer;  in dma_buf_dynamic_attach()
924 	attach->importer_ops = importer_ops;  in dma_buf_dynamic_attach()
925 	attach->importer_priv = importer_priv;  in dma_buf_dynamic_attach()
927 	if (dmabuf->ops->attach) {  in dma_buf_dynamic_attach()
928 		ret = dmabuf->ops->attach(dmabuf, attach);  in dma_buf_dynamic_attach()
933 	list_add(&attach->node, &dmabuf->attachments);  in dma_buf_dynamic_attach()
940 	if (dma_buf_attachment_is_dynamic(attach) !=  in dma_buf_dynamic_attach()
944 		dma_resv_lock(attach->dmabuf->resv, NULL);  in dma_buf_dynamic_attach()
945 		if (dma_buf_is_dynamic(attach->dmabuf)) {  in dma_buf_dynamic_attach()
946 			ret = dmabuf->ops->pin(attach);  in dma_buf_dynamic_attach()
951 		sgt = __map_dma_buf(attach, DMA_BIDIRECTIONAL);  in dma_buf_dynamic_attach()
958 		dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_dynamic_attach()
959 		attach->sgt = sgt;  in dma_buf_dynamic_attach()
960 		attach->dir = DMA_BIDIRECTIONAL;  in dma_buf_dynamic_attach()
963 	return attach;  in dma_buf_dynamic_attach()
966 	kfree(attach);  in dma_buf_dynamic_attach()
970 	if (dma_buf_is_dynamic(attach->dmabuf))  in dma_buf_dynamic_attach()
971 		dmabuf->ops->unpin(attach);  in dma_buf_dynamic_attach()
974 	dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_dynamic_attach()
976 	dma_buf_detach(dmabuf, attach);  in dma_buf_dynamic_attach()
983  * @dmabuf:	[in]	buffer to attach device to.
996 static void __unmap_dma_buf(struct dma_buf_attachment *attach,  in __unmap_dma_buf()  argument
1003 	attach->dmabuf->ops->unmap_dma_buf(attach, sg_table, direction);  in __unmap_dma_buf()
1009  * @attach:	[in]	attachment to be detached; is free'd after this call.
1015 void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)  in dma_buf_detach()  argument
1017 	if (WARN_ON(!dmabuf || !attach || dmabuf != attach->dmabuf))  in dma_buf_detach()
1022 	if (attach->sgt) {  in dma_buf_detach()
1024 		__unmap_dma_buf(attach, attach->sgt, attach->dir);  in dma_buf_detach()
1026 		if (dma_buf_is_dynamic(attach->dmabuf))  in dma_buf_detach()
1027 			dmabuf->ops->unpin(attach);  in dma_buf_detach()
1029 	list_del(&attach->node);  in dma_buf_detach()
1034 		dmabuf->ops->detach(dmabuf, attach);  in dma_buf_detach()
1036 	kfree(attach);  in dma_buf_detach()
1042  * @attach:	[in]	attachment which should be pinned
1044  * Only dynamic importers (who set up @attach with dma_buf_dynamic_attach()) may
1054 int dma_buf_pin(struct dma_buf_attachment *attach)  in dma_buf_pin()  argument
1056 	struct dma_buf *dmabuf = attach->dmabuf;  in dma_buf_pin()
1059 	WARN_ON(!dma_buf_attachment_is_dynamic(attach));  in dma_buf_pin()
1064 		ret = dmabuf->ops->pin(attach);  in dma_buf_pin()
1072  * @attach:	[in]	attachment which should be unpinned
1075  * any mapping of @attach again and inform the importer through
1078 void dma_buf_unpin(struct dma_buf_attachment *attach)  in dma_buf_unpin()  argument
1080 	struct dma_buf *dmabuf = attach->dmabuf;  in dma_buf_unpin()
1082 	WARN_ON(!dma_buf_attachment_is_dynamic(attach));  in dma_buf_unpin()
1087 		dmabuf->ops->unpin(attach);  in dma_buf_unpin()
1095  * @attach:	[in]	attachment whose scatterlist is to be returned
1112 struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,  in dma_buf_map_attachment()  argument
1120 	if (WARN_ON(!attach || !attach->dmabuf))  in dma_buf_map_attachment()
1123 	dma_resv_assert_held(attach->dmabuf->resv);  in dma_buf_map_attachment()
1125 	if (attach->sgt) {  in dma_buf_map_attachment()
1130 		if (attach->dir != direction &&  in dma_buf_map_attachment()
1131 		    attach->dir != DMA_BIDIRECTIONAL)  in dma_buf_map_attachment()
1134 		return attach->sgt;  in dma_buf_map_attachment()
1137 	if (dma_buf_is_dynamic(attach->dmabuf)) {  in dma_buf_map_attachment()
1139 			r = attach->dmabuf->ops->pin(attach);  in dma_buf_map_attachment()
1145 	sg_table = __map_dma_buf(attach, direction);  in dma_buf_map_attachment()
1149 	if (IS_ERR(sg_table) && dma_buf_is_dynamic(attach->dmabuf) &&  in dma_buf_map_attachment()
1151 		attach->dmabuf->ops->unpin(attach);  in dma_buf_map_attachment()
1153 	if (!IS_ERR(sg_table) && attach->dmabuf->ops->cache_sgt_mapping) {  in dma_buf_map_attachment()
1154 		attach->sgt = sg_table;  in dma_buf_map_attachment()
1155 		attach->dir = direction;  in dma_buf_map_attachment()
1183  * @attach:	[in]	attachment whose scatterlist is to be returned
1189 dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach,  in dma_buf_map_attachment_unlocked()  argument
1196 	if (WARN_ON(!attach || !attach->dmabuf))  in dma_buf_map_attachment_unlocked()
1199 	dma_resv_lock(attach->dmabuf->resv, NULL);  in dma_buf_map_attachment_unlocked()
1200 	sg_table = dma_buf_map_attachment(attach, direction);  in dma_buf_map_attachment_unlocked()
1201 	dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_map_attachment_unlocked()
1211  * @attach:	[in]	attachment to unmap buffer from
1217 void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,  in dma_buf_unmap_attachment()  argument
1223 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))  in dma_buf_unmap_attachment()
1226 	dma_resv_assert_held(attach->dmabuf->resv);  in dma_buf_unmap_attachment()
1228 	if (attach->sgt == sg_table)  in dma_buf_unmap_attachment()
1231 	__unmap_dma_buf(attach, sg_table, direction);  in dma_buf_unmap_attachment()
1233 	if (dma_buf_is_dynamic(attach->dmabuf) &&  in dma_buf_unmap_attachment()
1235 		dma_buf_unpin(attach);  in dma_buf_unmap_attachment()
1243  * @attach:	[in]	attachment to unmap buffer from
1249 void dma_buf_unmap_attachment_unlocked(struct dma_buf_attachment *attach,  in dma_buf_unmap_attachment_unlocked()  argument
1255 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))  in dma_buf_unmap_attachment_unlocked()
1258 	dma_resv_lock(attach->dmabuf->resv, NULL);  in dma_buf_unmap_attachment_unlocked()
1259 	dma_buf_unmap_attachment(attach, sg_table, direction);  in dma_buf_unmap_attachment_unlocked()
1260 	dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_unmap_attachment_unlocked()
1274 	struct dma_buf_attachment *attach;  in dma_buf_move_notify()  local
1278 	list_for_each_entry(attach, &dmabuf->attachments, node)  in dma_buf_move_notify()
1279 		if (attach->importer_ops)  in dma_buf_move_notify()
1280 			attach->importer_ops->move_notify(attach);  in dma_buf_move_notify()