.. SPDX-License-Identifier: GPL-2.0 ==================== mlx4 devlink support ==================== This document describes the devlink features implemented by the ``mlx4`` device driver. Parameters ========== .. list-table:: Generic parameters implemented * - Name - Mode * - ``internal_err_reset`` - driverinit, runtime * - ``max_macs`` - driverinit * - ``region_snapshot_enable`` - driverinit, runtime The ``mlx4`` driver also implements the following driver-specific parameters. .. list-table:: Driver-specific parameters implemented :widths: 5 5 5 85 * - Name - Type - Mode - Description * - ``enable_64b_cqe_eqe`` - Boolean - driverinit - Enable 64 byte CQEs/EQEs, if the FW supports it. * - ``enable_4k_uar`` - Boolean - driverinit - Enable using the 4k UAR. The ``mlx4`` driver supports reloading via ``DEVLINK_CMD_RELOAD`` Regions ======= The ``mlx4`` driver supports dumping the firmware PCI crspace and health buffer during a critical firmware issue. In case a firmware command times out, firmware getting stuck, or a non zero value on the catastrophic buffer, a snapshot will be taken by the driver. The ``cr-space`` region will contain the firmware PCI crspace contents. The ``fw-health`` region will contain the device firmware's health buffer. Snapshots for both of these regions are taken on the same event triggers.