1.. SPDX-License-Identifier: GPL-2.0 2 3==================== 4mlx4 devlink support 5==================== 6 7This document describes the devlink features implemented by the ``mlx4`` 8device driver. 9 10Parameters 11========== 12 13.. list-table:: Generic parameters implemented 14 15 * - Name 16 - Mode 17 * - ``internal_err_reset`` 18 - driverinit, runtime 19 * - ``max_macs`` 20 - driverinit 21 * - ``region_snapshot_enable`` 22 - driverinit, runtime 23 24The ``mlx4`` driver also implements the following driver-specific 25parameters. 26 27.. list-table:: Driver-specific parameters implemented 28 :widths: 5 5 5 85 29 30 * - Name 31 - Type 32 - Mode 33 - Description 34 * - ``enable_64b_cqe_eqe`` 35 - Boolean 36 - driverinit 37 - Enable 64 byte CQEs/EQEs, if the FW supports it. 38 * - ``enable_4k_uar`` 39 - Boolean 40 - driverinit 41 - Enable using the 4k UAR. 42 43The ``mlx4`` driver supports reloading via ``DEVLINK_CMD_RELOAD`` 44 45Regions 46======= 47 48The ``mlx4`` driver supports dumping the firmware PCI crspace and health 49buffer during a critical firmware issue. 50 51In case a firmware command times out, firmware getting stuck, or a non zero 52value on the catastrophic buffer, a snapshot will be taken by the driver. 53 54The ``cr-space`` region will contain the firmware PCI crspace contents. The 55``fw-health`` region will contain the device firmware's health buffer. 56Snapshots for both of these regions are taken on the same event triggers. 57