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The Linux Kernel
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  • Linux Devlink Documentation »
  • mlx4 devlink support
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mlx4 devlink support¶

This document describes the devlink features implemented by the mlx4 device driver.

Parameters¶

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.

Driver-specific parameters implemented¶

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.

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