The Linux Kernel Logo
  • Development process
  • Submitting patches
  • Code of conduct
  • Maintainer handbook
  • All development-process docs
  • Core API
  • Driver APIs
  • Subsystems
    • Core subsystems
    • Human interfaces
    • Networking interfaces
      • Networking
        • AF_XDP
        • Bare UDP Tunnelling Module Documentation
        • batman-adv
        • SocketCAN - Controller Area Network
        • The UCAN Protocol
        • Hardware Device Drivers
        • Networking Diagnostics
        • Distributed Switch Architecture
        • Linux Devlink Documentation
          • Locking
          • Nested instances
          • Interface documentation
          • Driver-specific documentation
            • bnxt devlink support
            • etas_es58x devlink support
            • hns3 devlink support
            • i40e devlink support
            • ionic devlink support
            • ice devlink support
            • mlx4 devlink support
            • mlx5 devlink support
            • mlxsw devlink support
            • mv88e6xxx devlink support
            • netdevsim devlink support
            • nfp devlink support
            • qed devlink support
            • ti-cpsw-switch devlink support
            • am65-cpsw-nuss devlink support
            • prestera devlink support
            • iosm devlink support
            • octeontx2 devlink support
              • Parameters
            • sfc devlink support
        • CAIF
        • Netlink interface for ethtool
        • IEEE 802.15.4 Developer’s Guide
        • ISO 15765-2 (ISO-TP)
        • J1939 Documentation
        • Linux Networking and Network Devices APIs
        • MSG_ZEROCOPY
        • FAILOVER
        • Net DIM - Generic Network Dynamic Interrupt Moderation
        • NET_FAILOVER
        • Page Pool API
        • PHY Abstraction Layer
        • phylink
        • IP-Aliasing
        • Ethernet Bridging
        • SNMP counter
        • Checksum Offloads
        • Segmentation Offloads
        • Scaling in the Linux Networking Stack
        • Kernel TLS
        • Kernel TLS offload
        • In-Kernel TLS Handshake
        • Linux NFC subsystem
        • Netdev private dataroom for 6lowpan interfaces
        • 6pack Protocol
        • ARCnet Hardware
        • ARCnet
        • ATM
        • AX.25
        • Linux Ethernet Bonding Driver HOWTO
        • cdc_mbim - Driver for CDC MBIM Mobile Broadband modems
        • DCCP protocol
        • DCTCP (DataCenter TCP)
        • Device Memory TCP
        • DNS Resolver Module
        • Softnet Driver Issues
        • EQL Driver: Serial IP Load Balancing HOWTO
        • LC-trie implementation notes
        • Linux Socket Filtering aka Berkeley Packet Filter (BPF)
        • Generic HDLC layer
        • Generic Netlink
        • Netlink Family Specifications
        • Generic networking statistics for netlink users
        • The Linux kernel GTP tunneling module
        • Identifier Locator Addressing (ILA)
        • IOAM6 Sysfs variables
        • io_uring zero copy Rx
        • IP dynamic address hack-port v0.03
        • IPsec
        • IP Sysctl
        • IPv6
        • IPVLAN Driver HOWTO
        • IPvs-sysctl
        • Kernel Connection Multiplexor
        • L2TP
        • The Linux LAPB Module Interface
        • How to use packet injection with mac80211
        • Management Component Transport Protocol (MCTP)
        • MPLS Sysfs variables
        • Multipath TCP (MPTCP)
        • MPTCP Sysfs variables
        • HOWTO for multiqueue network device support
        • Multi-PF Netdev
        • NAPI
        • Common Networking Struct Cachelines
        • Netconsole
        • Netdev features mess and how to get out from it alive
        • Network Devices, the Kernel, and You!
        • Netfilter Sysfs variables
        • NETIF Msg Level
        • Netmem Support for Network Drivers
        • Resilient Next-hop Groups
        • Netfilter Conntrack Sysfs variables
        • Netfilter’s flowtable infrastructure
        • OPEN Alliance 10BASE-T1x MAC-PHY Serial Interface (TC6) Framework Support
        • Open vSwitch datapath developer documentation
        • Operational States
        • Packet MMAP
        • Linux Phonet protocol family
        • PHY link topology
        • HOWTO for the linux packet generator
        • PLIP: The Parallel Line Internet Protocol Device
        • PPP Generic Driver and Channel Interface
        • The proc/net/tcp and proc/net/tcp6 variables
        • Power Sourcing Equipment (PSE) Documentation
        • How to use radiotap headers
        • RDS
        • Linux wireless regulatory documentation
        • Network Function Representors
        • RxRPC Network Protocol
        • SOCKET OPTIONS
        • SECURITY
        • EXAMPLE CLIENT USAGE
        • Linux Kernel SCTP
        • LSM/SeLinux secid
        • Seg6 Sysfs variables
        • struct sk_buff
        • SMC Sysctl
        • NIC SR-IOV APIs
        • Interface statistics
        • Stream Parser (strparser)
        • Ethernet switch device driver model (switchdev)
        • Sysfs tagging
        • TC Actions - Environmental Rules
        • TC queue based filtering
        • TCP Authentication Option Linux implementation (RFC5925)
        • Thin-streams and TCP
        • Team
        • Timestamping
        • Linux Kernel TIPC
        • Transparent proxy support
        • Universal TUN/TAP device driver
        • The UDP-Lite protocol (RFC 3828)
        • Virtual Routing and Forwarding (VRF)
        • Virtual eXtensible Local Area Networking documentation
        • Linux X.25 Project
        • X.25 Device Driver Interface
        • XFRM device - offloading the IPsec computations
        • XFRM proc - /proc/net/xfrm_* files
        • XFRM
        • XFRM Syscall
        • XDP RX Metadata
        • AF_XDP TX Metadata
      • NetLabel
      • InfiniBand
      • ISDN
      • MHI
    • Storage interfaces
    • Other subsystems
  • Locking
  • Licensing rules
  • Writing documentation
  • Development tools
  • Testing guide
  • Hacking guide
  • Tracing
  • Fault injection
  • Livepatching
  • Rust
  • Administration
  • Build system
  • Reporting issues
  • Userspace tools
  • Userspace API
  • Firmware
  • Firmware and Devicetree
  • CPU architectures
  • Unsorted documentation
  • Translations
The Linux Kernel
  • Kernel subsystem documentation
  • Networking
  • Linux Devlink Documentation
  • octeontx2 devlink support
  • View page source

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.

Driver-specific parameters implemented¶

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.

Driver-specific parameters implemented¶

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.

Driver-specific parameters implemented¶

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.

Previous Next

© Copyright The kernel development community.

Built with Sphinx using a theme provided by Read the Docs.