1.. SPDX-License-Identifier: GPL-2.0 2 3========================= 4octeontx2 devlink support 5========================= 6 7This document describes the devlink features implemented by the ``octeontx2 AF, PF and VF`` 8device drivers. 9 10Parameters 11========== 12 13The ``octeontx2 PF and VF`` drivers implement the following driver-specific parameters. 14 15.. list-table:: Driver-specific parameters implemented 16 :widths: 5 5 5 85 17 18 * - Name 19 - Type 20 - Mode 21 - Description 22 * - ``mcam_count`` 23 - u16 24 - runtime 25 - Select number of match CAM entries to be allocated for an interface. 26 The same is used for ntuple filters of the interface. Supported by 27 PF and VF drivers. 28 29The ``octeontx2 AF`` driver implements the following driver-specific parameters. 30 31.. list-table:: Driver-specific parameters implemented 32 :widths: 5 5 5 85 33 34 * - Name 35 - Type 36 - Mode 37 - Description 38 * - ``dwrr_mtu`` 39 - u32 40 - runtime 41 - Use to set the quantum which hardware uses for scheduling among transmit queues. 42 Hardware uses weighted DWRR algorithm to schedule among all transmit queues. 43 * - ``npc_mcam_high_zone_percent`` 44 - u8 45 - runtime 46 - Use to set the number of high priority zone entries in NPC MCAM that can be allocated 47 by a user, out of the three priority zone categories high, mid and low. 48 * - ``npc_def_rule_cntr`` 49 - bool 50 - runtime 51 - Use to enable or disable hit counters for the default rules in NPC MCAM. 52 Its not guaranteed that counters gets enabled and mapped to all the default rules, 53 since the counters are scarce and driver follows a best effort approach. 54 The default rule serves as the primary packet steering rule for a specific PF or VF, 55 based on its DMAC address which is installed by AF driver as part of its initialization. 56 Sample command to read hit counters for default rule from debugfs is as follows, 57 cat /sys/kernel/debug/cn10k/npc/mcam_rules 58 * - ``nix_maxlf`` 59 - u16 60 - runtime 61 - Use to set the maximum number of LFs in NIX hardware block. This would be useful 62 to increase the availability of default resources allocated to enabled LFs like 63 MCAM entries for example. 64 65The ``octeontx2 PF`` driver implements the following driver-specific parameters. 66 67.. list-table:: Driver-specific parameters implemented 68 :widths: 5 5 5 85 69 70 * - Name 71 - Type 72 - Mode 73 - Description 74 * - ``unicast_filter_count`` 75 - u8 76 - runtime 77 - Set the maximum number of unicast filters that can be programmed for 78 the device. This can be used to achieve better device resource 79 utilization, avoiding over consumption of unused MCAM table entries. 80