diff options
| author | Dragos Tatulea <dtatulea@nvidia.com> | 2025-09-07 12:39:35 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-09-09 19:21:30 -0700 |
| commit | f4053490a6f651476124903dbe0777e3c24ac8cb (patch) | |
| tree | 9b8280998f4d03350c0d9f467a08b1dac700cfce /Documentation/networking/devlink | |
| parent | 04d1ff1d75ba76d0c5df1513acebf43973788b17 (diff) | |
net/mlx5e: Make PCIe congestion event thresholds configurable
Add devlink driverinit parameters for configuring the thresholds for
PCIe congestion events. These parameters are registered only when the
firmware supports this feature.
Update the mlx5 devlink docs as well on these new params.
Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/1757237976-531416-2-git-send-email-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'Documentation/networking/devlink')
| -rw-r--r-- | Documentation/networking/devlink/mlx5.rst | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/Documentation/networking/devlink/mlx5.rst b/Documentation/networking/devlink/mlx5.rst index 07b1424cbfbb..60cc9fedf1ef 100644 --- a/Documentation/networking/devlink/mlx5.rst +++ b/Documentation/networking/devlink/mlx5.rst @@ -146,6 +146,58 @@ parameters. - u32 - driverinit - Control the size (in packets) of the hairpin queues. + * - ``pcie_cong_inbound_high`` + - u16 + - driverinit + - High threshold configuration for PCIe congestion events. The firmware + will send an event once device side inbound PCIe traffic went + above the configured high threshold for a long enough period (at least + 200ms). + + See pci_bw_inbound_high ethtool stat. + + Units are 0.01 %. Accepted values are in range [0, 10000]. + pcie_cong_inbound_low < pcie_cong_inbound_high. + Default value: 9000 (Corresponds to 90%). + * - ``pcie_cong_inbound_low`` + - u16 + - driverinit + - Low threshold configuration for PCIe congestion events. The firmware + will send an event once device side inbound PCIe traffic went + below the configured low threshold, only after having been previously in + a congested state. + + See pci_bw_inbound_low ethtool stat. + + Units are 0.01 %. Accepted values are in range [0, 10000]. + pcie_cong_inbound_low < pcie_cong_inbound_high. + Default value: 7500. + * - ``pcie_cong_outbound_high`` + - u16 + - driverinit + - High threshold configuration for PCIe congestion events. The firmware + will send an event once device side outbound PCIe traffic went + above the configured high threshold for a long enough period (at least + 200ms). + + See pci_bw_outbound_high ethtool stat. + + Units are 0.01 %. Accepted values are in range [0, 10000]. + pcie_cong_outbound_low < pcie_cong_outbound_high. + Default value: 9000 (Corresponds to 90%). + * - ``pcie_cong_outbound_low`` + - u16 + - driverinit + - Low threshold configuration for PCIe congestion events. The firmware + will send an event once device side outbound PCIe traffic went + below the configured low threshold, only after having been previously in + a congested state. + + See pci_bw_outbound_low ethtool stat. + + Units are 0.01 %. Accepted values are in range [0, 10000]. + pcie_cong_outbound_low < pcie_cong_outbound_high. + Default value: 7500. * - ``cqe_compress_type`` - string |