1ee7a711fSJacob Keller.. SPDX-License-Identifier: GPL-2.0 2ee7a711fSJacob Keller 3ee7a711fSJacob Keller==================== 4ee7a711fSJacob Kellermlx4 devlink support 5ee7a711fSJacob Keller==================== 6ee7a711fSJacob Keller 7ee7a711fSJacob KellerThis document describes the devlink features implemented by the ``mlx4`` 8ee7a711fSJacob Kellerdevice driver. 9ee7a711fSJacob Keller 10ee7a711fSJacob KellerParameters 11ee7a711fSJacob Keller========== 12ee7a711fSJacob Keller 13ee7a711fSJacob Keller.. list-table:: Generic parameters implemented 14ee7a711fSJacob Keller 15ee7a711fSJacob Keller * - Name 16ee7a711fSJacob Keller - Mode 17ee7a711fSJacob Keller * - ``internal_err_reset`` 18ee7a711fSJacob Keller - driverinit, runtime 19ee7a711fSJacob Keller * - ``max_macs`` 20ee7a711fSJacob Keller - driverinit 21ee7a711fSJacob Keller * - ``region_snapshot_enable`` 22ee7a711fSJacob Keller - driverinit, runtime 23ee7a711fSJacob Keller 24ee7a711fSJacob KellerThe ``mlx4`` driver also implements the following driver-specific 25ee7a711fSJacob Kellerparameters. 26ee7a711fSJacob Keller 27ee7a711fSJacob Keller.. list-table:: Driver-specific parameters implemented 28ee7a711fSJacob Keller :widths: 5 5 5 85 29ee7a711fSJacob Keller 30ee7a711fSJacob Keller * - Name 31ee7a711fSJacob Keller - Type 32ee7a711fSJacob Keller - Mode 33ee7a711fSJacob Keller - Description 34ee7a711fSJacob Keller * - ``enable_64b_cqe_eqe`` 35ee7a711fSJacob Keller - Boolean 36ee7a711fSJacob Keller - driverinit 37ee7a711fSJacob Keller - Enable 64 byte CQEs/EQEs, if the FW supports it. 38ee7a711fSJacob Keller * - ``enable_4k_uar`` 39ee7a711fSJacob Keller - Boolean 40ee7a711fSJacob Keller - driverinit 41ee7a711fSJacob Keller - Enable using the 4k UAR. 42ee7a711fSJacob Keller 43ee7a711fSJacob KellerThe ``mlx4`` driver supports reloading via ``DEVLINK_CMD_RELOAD`` 44*0b0f945fSJacob Keller 45*0b0f945fSJacob KellerRegions 46*0b0f945fSJacob Keller======= 47*0b0f945fSJacob Keller 48*0b0f945fSJacob KellerThe ``mlx4`` driver supports dumping the firmware PCI crspace and health 49*0b0f945fSJacob Kellerbuffer during a critical firmware issue. 50*0b0f945fSJacob Keller 51*0b0f945fSJacob KellerIn case a firmware command times out, firmware getting stuck, or a non zero 52*0b0f945fSJacob Kellervalue on the catastrophic buffer, a snapshot will be taken by the driver. 53*0b0f945fSJacob Keller 54*0b0f945fSJacob KellerThe ``cr-space`` region will contain the firmware PCI crspace contents. The 55*0b0f945fSJacob Keller``fw-health`` region will contain the device firmware's health buffer. 56*0b0f945fSJacob KellerSnapshots for both of these regions are taken on the same event triggers. 57