int nvme_mi_mi_read_mi_data_subsys (nvme_mi_ep_t ep , struct nvme_mi_read_nvm_ss_info *s );
endpoint for MI communication
subsystem information to populate
Retrieves the Subsystem information - number of external ports and NVMe version information. See struct nvme_mi_read_nvm_ss_info.
The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..