NVME_CSTS_NSSRO
bool nssro = dev->subsystem && (csts & NVME_CSTS_NSSRO);
(readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_NSSRO))
writel(NVME_CSTS_NSSRO, dev->bar + NVME_REG_CSTS);
[NVME_CSTS_NSSRO] = "reset",