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

enum nvme_id_ctrl_mec - Flags indicating the capabilities of the Management Endpoint in the Controller, &struct nvme_id_ctrl.mec.

enum nvme_id_ctrl_mec {
NVME_CTRL_MEC_SMBUSME ,
NVME_CTRL_MEC_PCIEME

};

If set, then the NVM Subsystem contains a Management Endpoint on an SMBus/I2C port.
If set, then the NVM Subsystem contains a Management Endpoint on a PCIe port.
enum nvme_id_ctrl_mec January 2023