NAME

nvme_mi_mi_xfer - Raw mi transfer interface.

SYNOPSIS

int nvme_mi_mi_xfer (nvme_mi_ep_t ep , struct nvme_mi_mi_req_hdr *mi_req , size_t req_data_size , struct nvme_mi_mi_resp_hdr *mi_resp , size_t *resp_data_size );

ARGUMENTS

ep

endpoint to send the MI command to

mi_req

request data

req_data_size

size of request data payload

mi_resp

buffer for response data

resp_data_size

size of response data buffer, updated to received size

DESCRIPTION

Performs an arbitrary NVMe MI command, using the provided request data, in mi_req. The size of the request data *payload* is specified in req_data_size - this does not include the standard header length (so a header-only request would have a size of 0). Note that the Management Request Doublewords are considered part of the header data.

On success, response data is stored in mi_resp, which has an optional appended payload buffer of resp_data_size bytes. The actual payload size transferred will be stored in resp_data_size. This size does not include the MI response header, so 0 represents no payload.

See: struct nvme_mi_mi_req_hdr and struct nvme_mi_mi_resp_hdr.

RETURN

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..