Function mana_mp_req_verbs_cmd_fd

dpdk/drivers/net/mana/mp.c:207–253

}

int
mana_mp_req_verbs_cmd_fd(struct rte_eth_dev *dev)
{
	struct rte_mp_msg mp_req = { 0 };
	struct rte_mp_msg *mp_res;
	struct rte_mp_reply mp_rep;
	struct mana_mp_param *res;
	struct timespec ts = {.tv_sec = MANA_MP_REQ_TIMEOUT_SEC, .tv_nsec = 0};
	int ret;

	mp_init_msg(&mp_req, MANA_MP_REQ_VERBS_CMD_FD, dev->data->port_id);

	ret = rte_mp_request_sync(&mp_req, &mp_rep, &ts);
	if (ret) {
		DRV_LOG(ERR, "port %u request to primary process failed",
			dev->data->port_id);
		return ret;
	}

	if (mp_rep.nb_received != 1) {
		DRV_LOG(ERR, "primary replied %u messages", mp_rep.nb_received);
		ret = -EPROTO;
		goto exit;
	}

	mp_res = &mp_rep.msgs[0];
	res = (struct mana_mp_param *)mp_res->param;
	if (res->result) {
		DRV_LOG(ERR, "failed to get CMD FD, port %u",
			dev->data->port_id);
		ret = res->result;
		goto exit;
	}

	if (mp_res->num_fds != 1) {
		DRV_LOG(ERR, "got FDs %d unexpected", mp_res->num_fds);
		ret = -EPROTO;
		goto exit;
	}

	ret = mp_res->fds[0];
	DRV_LOG(ERR, "port %u command FD from primary is %d",
		dev->data->port_id, ret);
exit:
	free(mp_rep.msgs);
	return ret;
}

/*
 * Request the primary process to register a MR.