752 					 u64 prp)  in nvmet_pci_epf_prp_ofst()  argument
754 	return prp & ctrl->mps_mask;  in nvmet_pci_epf_prp_ofst()
758 					    u64 prp)  in nvmet_pci_epf_prp_size()  argument
760 	return ctrl->mps - nvmet_pci_epf_prp_ofst(ctrl, prp);  in nvmet_pci_epf_prp_size()
764  * Transfer a PRP list from the host and return the number of prps.
766 static int nvmet_pci_epf_get_prp_list(struct nvmet_pci_epf_ctrl *ctrl, u64 prp,  in nvmet_pci_epf_get_prp_list()  argument
776 	 * with the PRP list pointer specified, only return the space available  in nvmet_pci_epf_get_prp_list()
777 	 * in the memory page, the last PRP in there will be a PRP list pointer  in nvmet_pci_epf_get_prp_list()
780 	length = min(nvmet_pci_epf_prp_size(ctrl, prp), nr_prps << 3);  in nvmet_pci_epf_get_prp_list()
781 	ret = nvmet_pci_epf_transfer(ctrl, prps, prp, length, DMA_FROM_DEVICE);  in nvmet_pci_epf_get_prp_list()
796 	u64 pci_addr, prp;  in nvmet_pci_epf_iod_parse_prp_list()  local
810 	prp = le64_to_cpu(cmd->common.dptr.prp1);  in nvmet_pci_epf_iod_parse_prp_list()
811 	if (!prp)  in nvmet_pci_epf_iod_parse_prp_list()
814 	ofst = nvmet_pci_epf_prp_ofst(ctrl, prp);  in nvmet_pci_epf_iod_parse_prp_list()
823 	seg->pci_addr = prp;  in nvmet_pci_epf_iod_parse_prp_list()
824 	seg->length = nvmet_pci_epf_prp_size(ctrl, prp);  in nvmet_pci_epf_iod_parse_prp_list()
827 	pci_addr = prp + size;  in nvmet_pci_epf_iod_parse_prp_list()
831 	 * Now build the PCI address segments using the PRP lists, starting  in nvmet_pci_epf_iod_parse_prp_list()
834 	prp = le64_to_cpu(cmd->common.dptr.prp2);  in nvmet_pci_epf_iod_parse_prp_list()
835 	if (!prp)  in nvmet_pci_epf_iod_parse_prp_list()
842 			nr_prps = nvmet_pci_epf_get_prp_list(ctrl, prp,  in nvmet_pci_epf_iod_parse_prp_list()
852 		prp = le64_to_cpu(prps[i]);  in nvmet_pci_epf_iod_parse_prp_list()
853 		if (!prp)  in nvmet_pci_epf_iod_parse_prp_list()
856 		/* Did we reach the last PRP entry of the list? */  in nvmet_pci_epf_iod_parse_prp_list()
858 			/* We need more PRPs: PRP is a list pointer. */  in nvmet_pci_epf_iod_parse_prp_list()
863 		/* Only the first PRP is allowed to have an offset. */  in nvmet_pci_epf_iod_parse_prp_list()
864 		if (nvmet_pci_epf_prp_ofst(ctrl, prp))  in nvmet_pci_epf_iod_parse_prp_list()
867 		if (prp != pci_addr) {  in nvmet_pci_epf_iod_parse_prp_list()
868 			/* Discontiguous prp: new segment. */  in nvmet_pci_epf_iod_parse_prp_list()
874 			seg->pci_addr = prp;  in nvmet_pci_epf_iod_parse_prp_list()
876 			pci_addr = prp;  in nvmet_pci_epf_iod_parse_prp_list()