libnvme_mi_mi_xfer-libnvme3(2)

Usage

int libnvme_mi_mi_xfer (struct libnvme_mi_ep *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

Overview

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 negative error code otherwise.