ntb_epf_send_command
ret = ntb_epf_send_command(ndev, CMD_LINK_UP, 0);
ret = ntb_epf_send_command(ndev, CMD_LINK_DOWN, 0);
ret = ntb_epf_send_command(ndev, CMD_CONFIGURE_DOORBELL,
ntb_epf_send_command(ndev, CMD_CONFIGURE_MW, idx);
ntb_epf_send_command(ndev, CMD_TEARDOWN_MW, idx);
ntb_epf_send_command(ndev, CMD_TEARDOWN_DOORBELL, ndev->db_count + 1);