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- .. SPDX-License-Identifier: GPL-2.0
- =========================
- octeontx2 devlink support
- =========================
- This document describes the devlink features implemented by the ``octeontx2 AF, PF and VF``
- device drivers.
- Parameters
- ==========
- The ``octeontx2 PF and VF`` drivers implement the following driver-specific parameters.
- .. list-table:: Driver-specific parameters implemented
- :widths: 5 5 5 85
- * - Name
- - Type
- - Mode
- - Description
- * - ``mcam_count``
- - u16
- - runtime
- - Select number of match CAM entries to be allocated for an interface.
- The same is used for ntuple filters of the interface. Supported by
- PF and VF drivers.
- The ``octeontx2 AF`` driver implements the following driver-specific parameters.
- .. list-table:: Driver-specific parameters implemented
- :widths: 5 5 5 85
- * - Name
- - Type
- - Mode
- - Description
- * - ``dwrr_mtu``
- - u32
- - runtime
- - Use to set the quantum which hardware uses for scheduling among transmit queues.
- Hardware uses weighted DWRR algorithm to schedule among all transmit queues.
- * - ``npc_mcam_high_zone_percent``
- - u8
- - runtime
- - Use to set the number of high priority zone entries in NPC MCAM that can be allocated
- by a user, out of the three priority zone categories high, mid and low.
- * - ``npc_def_rule_cntr``
- - bool
- - runtime
- - Use to enable or disable hit counters for the default rules in NPC MCAM.
- Its not guaranteed that counters gets enabled and mapped to all the default rules,
- since the counters are scarce and driver follows a best effort approach.
- The default rule serves as the primary packet steering rule for a specific PF or VF,
- based on its DMAC address which is installed by AF driver as part of its initialization.
- Sample command to read hit counters for default rule from debugfs is as follows,
- cat /sys/kernel/debug/cn10k/npc/mcam_rules
- * - ``nix_maxlf``
- - u16
- - runtime
- - Use to set the maximum number of LFs in NIX hardware block. This would be useful
- to increase the availability of default resources allocated to enabled LFs like
- MCAM entries for example.
- The ``octeontx2 PF`` driver implements the following driver-specific parameters.
- .. list-table:: Driver-specific parameters implemented
- :widths: 5 5 5 85
- * - Name
- - Type
- - Mode
- - Description
- * - ``unicast_filter_count``
- - u8
- - runtime
- - Set the maximum number of unicast filters that can be programmed for
- the device. This can be used to achieve better device resource
- utilization, avoiding over consumption of unused MCAM table entries.
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