dma-buf.c - OpenGrok cross reference for /kernel/linux/linux-5.10/drivers/dma-buf/dma-buf.c

Lines Matching refs:attach
688  * calls attach() of dma_buf_ops to allow device-specific attach functionality
689  * @dmabuf:		[in]	buffer to attach device to.
711 	struct dma_buf_attachment *attach;
720 	attach = kzalloc(sizeof(*attach), GFP_KERNEL);
721 	if (!attach)
724 	attach->dev = dev;
725 	attach->dmabuf = dmabuf;
727 		attach->peer2peer = importer_ops->allow_peer2peer;
728 	attach->importer_ops = importer_ops;
729 	attach->importer_priv = importer_priv;
731 	if (dmabuf->ops->attach) {
732 		ret = dmabuf->ops->attach(dmabuf, attach);
737 	list_add(&attach->node, &dmabuf->attachments);
744 	if (dma_buf_attachment_is_dynamic(attach) !=
748 		if (dma_buf_is_dynamic(attach->dmabuf)) {
749 			dma_resv_lock(attach->dmabuf->resv, NULL);
750 			ret = dma_buf_pin(attach);
755 		sgt = dmabuf->ops->map_dma_buf(attach, DMA_BIDIRECTIONAL);
762 		if (dma_buf_is_dynamic(attach->dmabuf))
763 			dma_resv_unlock(attach->dmabuf->resv);
764 		attach->sgt = sgt;
765 		attach->dir = DMA_BIDIRECTIONAL;
768 	return attach;
771 	kfree(attach);
775 	if (dma_buf_is_dynamic(attach->dmabuf))
776 		dma_buf_unpin(attach);
779 	if (dma_buf_is_dynamic(attach->dmabuf))
780 		dma_resv_unlock(attach->dmabuf->resv);
782 	dma_buf_detach(dmabuf, attach);
789  * @dmabuf:	[in]	buffer to attach device to.
806  * @attach:	[in]	attachment to be detached; is free'd after this call.
810 void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)
812 	if (WARN_ON(!dmabuf || !attach))
815 	if (attach->sgt) {
816 		if (dma_buf_is_dynamic(attach->dmabuf))
817 			dma_resv_lock(attach->dmabuf->resv, NULL);
819 		dmabuf->ops->unmap_dma_buf(attach, attach->sgt, attach->dir);
821 		if (dma_buf_is_dynamic(attach->dmabuf)) {
822 			dma_buf_unpin(attach);
823 			dma_resv_unlock(attach->dmabuf->resv);
828 	list_del(&attach->node);
831 		dmabuf->ops->detach(dmabuf, attach);
833 	kfree(attach);
840  * @attach:	[in]	attachment which should be pinned
845 int dma_buf_pin(struct dma_buf_attachment *attach)
847 	struct dma_buf *dmabuf = attach->dmabuf;
853 		ret = dmabuf->ops->pin(attach);
862  * @attach:	[in]	attachment which should be unpinned
864 void dma_buf_unpin(struct dma_buf_attachment *attach)
866 	struct dma_buf *dmabuf = attach->dmabuf;
871 		dmabuf->ops->unpin(attach);
879  * @attach:	[in]	attachment whose scatterlist is to be returned
890 struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,
898 	if (WARN_ON(!attach || !attach->dmabuf))
901 	if (dma_buf_attachment_is_dynamic(attach))
902 		dma_resv_assert_held(attach->dmabuf->resv);
904 	if (attach->sgt) {
909 		if (attach->dir != direction &&
910 		    attach->dir != DMA_BIDIRECTIONAL)
913 		return attach->sgt;
916 	if (dma_buf_is_dynamic(attach->dmabuf)) {
917 		dma_resv_assert_held(attach->dmabuf->resv);
919 			r = dma_buf_pin(attach);
925 	sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);
929 	if (IS_ERR(sg_table) && dma_buf_is_dynamic(attach->dmabuf) &&
931 		dma_buf_unpin(attach);
933 	if (!IS_ERR(sg_table) && attach->dmabuf->ops->cache_sgt_mapping) {
934 		attach->sgt = sg_table;
935 		attach->dir = direction;
946  * @attach:	[in]	attachment to unmap buffer from
952 void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
958 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))
961 	if (dma_buf_attachment_is_dynamic(attach))
962 		dma_resv_assert_held(attach->dmabuf->resv);
964 	if (attach->sgt == sg_table)
967 	if (dma_buf_is_dynamic(attach->dmabuf))
968 		dma_resv_assert_held(attach->dmabuf->resv);
970 	attach->dmabuf->ops->unmap_dma_buf(attach, sg_table, direction);
972 	if (dma_buf_is_dynamic(attach->dmabuf) &&
974 		dma_buf_unpin(attach);
988 	struct dma_buf_attachment *attach;
992 	list_for_each_entry(attach, &dmabuf->attachments, node)
993 		if (attach->importer_ops)
994 			attach->importer_ops->move_notify(attach);