nvme_mi_admin_xfer

NAME

nvme_mi_admin_xfer - Raw admin transfer interface.

SYNOPSIS

int nvme_mi_admin_xfer (nvme_mi_ctrl_t ctrl , struct nvme_mi_admin_req_hdr *admin_req , size_t req_data_size , struct nvme_mi_admin_resp_hdr *admin_resp , off_t resp_data_offset , size_t *resp_data_size );

ARGUMENTS

	ctrl		controller to send the admin command to
	admin_req		request data

req_data_size

size of request data payload

admin_resp

buffer for response data

resp_data_offset

offset into request data to retrieve from controller

resp_data_size

size of response data buffer, updated to received size

DESCRIPTION

Performs an arbitrary NVMe Admin command, using the provided request data, in admin_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).

On success, response data is stored in admin_resp, which has an optional appended payload buffer of resp_data_size bytes. The actual payload transferred will be stored in resp_data_size. These sizes do not include the Admin request header, so 0 represents no payload.

As with all Admin commands, we can request partial data from the Admin Response payload, offset by resp_data_offset.

See: struct nvme_mi_admin_req_hdr and struct nvme_mi_admin_resp_hdr.

RETURN

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