5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
57 lines
1.4 KiB
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57 lines
1.4 KiB
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.. SPDX-License-Identifier: GPL-2.0
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====================
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mlx4 devlink support
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====================
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This document describes the devlink features implemented by the ``mlx4``
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device driver.
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Parameters
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==========
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.. list-table:: Generic parameters implemented
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* - Name
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- Mode
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* - ``internal_err_reset``
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- driverinit, runtime
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* - ``max_macs``
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- driverinit
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* - ``region_snapshot_enable``
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- driverinit, runtime
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The ``mlx4`` driver also implements the following driver-specific
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parameters.
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.. list-table:: Driver-specific parameters implemented
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:widths: 5 5 5 85
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* - Name
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- Type
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- Mode
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- Description
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* - ``enable_64b_cqe_eqe``
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- Boolean
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- driverinit
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- Enable 64 byte CQEs/EQEs, if the FW supports it.
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* - ``enable_4k_uar``
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- Boolean
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- driverinit
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- Enable using the 4k UAR.
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The ``mlx4`` driver supports reloading via ``DEVLINK_CMD_RELOAD``
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Regions
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=======
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The ``mlx4`` driver supports dumping the firmware PCI crspace and health
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buffer during a critical firmware issue.
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In case a firmware command times out, firmware getting stuck, or a non zero
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value on the catastrophic buffer, a snapshot will be taken by the driver.
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The ``cr-space`` region will contain the firmware PCI crspace contents. The
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``fw-health`` region will contain the device firmware's health buffer.
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Snapshots for both of these regions are taken on the same event triggers.
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