777 static struct sg_table * __map_dma_buf(struct dma_buf_attachment *attach,  in __map_dma_buf()  argument
783 	sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);  in __map_dma_buf()
787 	if (!dma_buf_attachment_is_dynamic(attach)) {  in __map_dma_buf()
788 		ret = dma_resv_wait_timeout(attach->dmabuf->resv,  in __map_dma_buf()
792 			attach->dmabuf->ops->unmap_dma_buf(attach, sg_table,  in __map_dma_buf()
843  *     - &dma_buf_ops.attach()
868  * @dmabuf:		[in]	buffer to attach device to.
876  * Optionally this calls &dma_buf_ops.attach to allow device-specific attach
893 	struct dma_buf_attachment *attach;  in dma_buf_dynamic_attach()  local
902 	attach = kzalloc(sizeof(*attach), GFP_KERNEL);  in dma_buf_dynamic_attach()
903 	if (!attach)  in dma_buf_dynamic_attach()
906 	attach->dev = dev;  in dma_buf_dynamic_attach()
907 	attach->dmabuf = dmabuf;  in dma_buf_dynamic_attach()
909 		attach->peer2peer = importer_ops->allow_peer2peer;  in dma_buf_dynamic_attach()
910 	attach->importer_ops = importer_ops;  in dma_buf_dynamic_attach()
911 	attach->importer_priv = importer_priv;  in dma_buf_dynamic_attach()
913 	if (dmabuf->ops->attach) {  in dma_buf_dynamic_attach()
914 		ret = dmabuf->ops->attach(dmabuf, attach);  in dma_buf_dynamic_attach()
919 	list_add(&attach->node, &dmabuf->attachments);  in dma_buf_dynamic_attach()
926 	if (dma_buf_attachment_is_dynamic(attach) !=  in dma_buf_dynamic_attach()
930 		dma_resv_lock(attach->dmabuf->resv, NULL);  in dma_buf_dynamic_attach()
931 		if (dma_buf_is_dynamic(attach->dmabuf)) {  in dma_buf_dynamic_attach()
932 			ret = dmabuf->ops->pin(attach);  in dma_buf_dynamic_attach()
937 		sgt = __map_dma_buf(attach, DMA_BIDIRECTIONAL);  in dma_buf_dynamic_attach()
944 		dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_dynamic_attach()
945 		attach->sgt = sgt;  in dma_buf_dynamic_attach()
946 		attach->dir = DMA_BIDIRECTIONAL;  in dma_buf_dynamic_attach()
949 	return attach;  in dma_buf_dynamic_attach()
952 	kfree(attach);  in dma_buf_dynamic_attach()
956 	if (dma_buf_is_dynamic(attach->dmabuf))  in dma_buf_dynamic_attach()
957 		dmabuf->ops->unpin(attach);  in dma_buf_dynamic_attach()
960 	dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_dynamic_attach()
962 	dma_buf_detach(dmabuf, attach);  in dma_buf_dynamic_attach()
969  * @dmabuf:	[in]	buffer to attach device to.
982 static void __unmap_dma_buf(struct dma_buf_attachment *attach,  in __unmap_dma_buf()  argument
989 	attach->dmabuf->ops->unmap_dma_buf(attach, sg_table, direction);  in __unmap_dma_buf()
995  * @attach:	[in]	attachment to be detached; is free'd after this call.
1001 void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)  in dma_buf_detach()  argument
1003 	if (WARN_ON(!dmabuf || !attach || dmabuf != attach->dmabuf))  in dma_buf_detach()
1008 	if (attach->sgt) {  in dma_buf_detach()
1010 		__unmap_dma_buf(attach, attach->sgt, attach->dir);  in dma_buf_detach()
1012 		if (dma_buf_is_dynamic(attach->dmabuf))  in dma_buf_detach()
1013 			dmabuf->ops->unpin(attach);  in dma_buf_detach()
1015 	list_del(&attach->node);  in dma_buf_detach()
1020 		dmabuf->ops->detach(dmabuf, attach);  in dma_buf_detach()
1022 	kfree(attach);  in dma_buf_detach()
1028  * @attach:	[in]	attachment which should be pinned
1030  * Only dynamic importers (who set up @attach with dma_buf_dynamic_attach()) may
1040 int dma_buf_pin(struct dma_buf_attachment *attach)  in dma_buf_pin()  argument
1042 	struct dma_buf *dmabuf = attach->dmabuf;  in dma_buf_pin()
1045 	WARN_ON(!dma_buf_attachment_is_dynamic(attach));  in dma_buf_pin()
1050 		ret = dmabuf->ops->pin(attach);  in dma_buf_pin()
1058  * @attach:	[in]	attachment which should be unpinned
1061  * any mapping of @attach again and inform the importer through
1064 void dma_buf_unpin(struct dma_buf_attachment *attach)  in dma_buf_unpin()  argument
1066 	struct dma_buf *dmabuf = attach->dmabuf;  in dma_buf_unpin()
1068 	WARN_ON(!dma_buf_attachment_is_dynamic(attach));  in dma_buf_unpin()
1073 		dmabuf->ops->unpin(attach);  in dma_buf_unpin()
1081  * @attach:	[in]	attachment whose scatterlist is to be returned
1098 struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,  in dma_buf_map_attachment()  argument
1106 	if (WARN_ON(!attach || !attach->dmabuf))  in dma_buf_map_attachment()
1109 	dma_resv_assert_held(attach->dmabuf->resv);  in dma_buf_map_attachment()
1111 	if (attach->sgt) {  in dma_buf_map_attachment()
1116 		if (attach->dir != direction &&  in dma_buf_map_attachment()
1117 		    attach->dir != DMA_BIDIRECTIONAL)  in dma_buf_map_attachment()
1120 		return attach->sgt;  in dma_buf_map_attachment()
1123 	if (dma_buf_is_dynamic(attach->dmabuf)) {  in dma_buf_map_attachment()
1125 			r = attach->dmabuf->ops->pin(attach);  in dma_buf_map_attachment()
1131 	sg_table = __map_dma_buf(attach, direction);  in dma_buf_map_attachment()
1135 	if (IS_ERR(sg_table) && dma_buf_is_dynamic(attach->dmabuf) &&  in dma_buf_map_attachment()
1137 		attach->dmabuf->ops->unpin(attach);  in dma_buf_map_attachment()
1139 	if (!IS_ERR(sg_table) && attach->dmabuf->ops->cache_sgt_mapping) {  in dma_buf_map_attachment()
1140 		attach->sgt = sg_table;  in dma_buf_map_attachment()
1141 		attach->dir = direction;  in dma_buf_map_attachment()
1169  * @attach:	[in]	attachment whose scatterlist is to be returned
1175 dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach,  in dma_buf_map_attachment_unlocked()  argument
1182 	if (WARN_ON(!attach || !attach->dmabuf))  in dma_buf_map_attachment_unlocked()
1185 	dma_resv_lock(attach->dmabuf->resv, NULL);  in dma_buf_map_attachment_unlocked()
1186 	sg_table = dma_buf_map_attachment(attach, direction);  in dma_buf_map_attachment_unlocked()
1187 	dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_map_attachment_unlocked()
1197  * @attach:	[in]	attachment to unmap buffer from
1203 void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,  in dma_buf_unmap_attachment()  argument
1209 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))  in dma_buf_unmap_attachment()
1212 	dma_resv_assert_held(attach->dmabuf->resv);  in dma_buf_unmap_attachment()
1214 	if (attach->sgt == sg_table)  in dma_buf_unmap_attachment()
1217 	__unmap_dma_buf(attach, sg_table, direction);  in dma_buf_unmap_attachment()
1219 	if (dma_buf_is_dynamic(attach->dmabuf) &&  in dma_buf_unmap_attachment()
1221 		dma_buf_unpin(attach);  in dma_buf_unmap_attachment()
1229  * @attach:	[in]	attachment to unmap buffer from
1235 void dma_buf_unmap_attachment_unlocked(struct dma_buf_attachment *attach,  in dma_buf_unmap_attachment_unlocked()  argument
1241 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))  in dma_buf_unmap_attachment_unlocked()
1244 	dma_resv_lock(attach->dmabuf->resv, NULL);  in dma_buf_unmap_attachment_unlocked()
1245 	dma_buf_unmap_attachment(attach, sg_table, direction);  in dma_buf_unmap_attachment_unlocked()
1246 	dma_resv_unlock(attach->dmabuf->resv);  in dma_buf_unmap_attachment_unlocked()
1260 	struct dma_buf_attachment *attach;  in dma_buf_move_notify()  local
1264 	list_for_each_entry(attach, &dmabuf->attachments, node)  in dma_buf_move_notify()
1265 		if (attach->importer_ops)  in dma_buf_move_notify()
1266 			attach->importer_ops->move_notify(attach);  in dma_buf_move_notify()