nvme_mi_mi_req_hdr - Man Page

struct nvme_mi_mi_req_hdr {
   struct nvme_mi_msg_hdr hdr;
   __u8 opcode;
   __u8 rsvd0[3];
   __le32 cdw0, cdw1;
};

hdr

generic MI message header

opcode

opcode (OPC) for the specific MI command

rsvd0

reserved bytes

cdw0

Management Request Doubleword 0 - command specific usage

cdw1

Management Request Doubleword 1 - command specific usage

Wire format for MI request message headers, defined in section 5 of NVMe-MI.