nvme_pci_sgl_set_data
nvme_pci_sgl_set_data(&iod->cmd.common.dptr.sgl, iter);
nvme_pci_sgl_set_data(&sg_list[mapped++], iter);
nvme_pci_sgl_set_data(sg_list, &iter);
nvme_pci_sgl_set_data(&sg_list[++i], &iter);