DOKK / manpages / debian 12 / libnvme-dev / nvme_id_ctrl_frmw.2.en
libnvme(2) API Manual libnvme(2)

enum nvme_id_ctrl_frmw - Flags and values indicates capabilities regarding firmware updates from &struct nvme_id_ctrl.frmw.

enum nvme_id_ctrl_frmw {
NVME_CTRL_FRMW_1ST_RO ,
NVME_CTRL_FRMW_NR_SLOTS ,
NVME_CTRL_FRMW_FW_ACT_NO_RESET ,
NVME_CTRL_FRMW_MP_UP_DETECTION

};

If set, the first firmware slot is readonly
Mask to get the value of the number of firmware slots that the controller supports.
If set, the controller supports firmware activation without a reset.
If set, the controller is able to detect overlapping firmware/boot partition image update.
enum nvme_id_ctrl_frmw January 2023