1.. SPDX-License-Identifier: GPL-2.0 2 3==================== 4mlx5 devlink support 5==================== 6 7This document describes the devlink features implemented by the ``mlx5`` 8device driver. 9 10Parameters 11========== 12 13.. list-table:: Generic parameters implemented 14 15 * - Name 16 - Mode 17 - Validation 18 * - ``enable_roce`` 19 - driverinit 20 - Type: Boolean 21 * - ``io_eq_size`` 22 - driverinit 23 - The range is between 64 and 4096. 24 * - ``event_eq_size`` 25 - driverinit 26 - The range is between 64 and 4096. 27 * - ``max_macs`` 28 - driverinit 29 - The range is between 1 and 2^31. Only power of 2 values are supported. 30 31The ``mlx5`` driver also implements the following driver-specific 32parameters. 33 34.. list-table:: Driver-specific parameters implemented 35 :widths: 5 5 5 85 36 37 * - Name 38 - Type 39 - Mode 40 - Description 41 * - ``flow_steering_mode`` 42 - string 43 - runtime 44 - Controls the flow steering mode of the driver 45 46 * ``dmfs`` Device managed flow steering. In DMFS mode, the HW 47 steering entities are created and managed through firmware. 48 * ``smfs`` Software managed flow steering. In SMFS mode, the HW 49 steering entities are created and manage through the driver without 50 firmware intervention. 51 * - ``fdb_large_groups`` 52 - u32 53 - driverinit 54 - Control the number of large groups (size > 1) in the FDB table. 55 56 * The default value is 15, and the range is between 1 and 1024. 57 * - ``esw_multiport`` 58 - Boolean 59 - runtime 60 - Control MultiPort E-Switch shared fdb mode. 61 62 An experimental mode where a single E-Switch is used and all the vports 63 and physical ports on the NIC are connected to it. 64 65 An example is to send traffic from a VF that is created on PF0 to an 66 uplink that is natively associated with the uplink of PF1 67 68 Note: Future devices, ConnectX-8 and onward, will eventually have this 69 as the default to allow forwarding between all NIC ports in a single 70 E-switch environment and the dual E-switch mode will likely get 71 deprecated. 72 73 Default: disabled 74 75 76The ``mlx5`` driver supports reloading via ``DEVLINK_CMD_RELOAD`` 77 78Info versions 79============= 80 81The ``mlx5`` driver reports the following versions 82 83.. list-table:: devlink info versions implemented 84 :widths: 5 5 90 85 86 * - Name 87 - Type 88 - Description 89 * - ``fw.psid`` 90 - fixed 91 - Used to represent the board id of the device. 92 * - ``fw.version`` 93 - stored, running 94 - Three digit major.minor.subminor firmware version number. 95