diff options
| author | Cosmin Ratiu <cratiu@nvidia.com> | 2025-09-16 17:11:44 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-09-17 18:30:54 -0700 |
| commit | 11bbcfb7668c6f4d97260f7caaefea22678bc31e (patch) | |
| tree | 75680a9629fbc958480c9265e4e489a7df891721 /Documentation/networking/devlink | |
| parent | 6bdcb735fec6cb866b0d40634d4f23effba81074 (diff) | |
net/mlx5e: Use the 'num_doorbells' devlink param
Use the new devlink param to control how many doorbells mlx5e devices
allocate and use. The maximum number of doorbells configurable is capped
to the maximum number of channels. This only applies to the Ethernet
part, the RDMA devices using mlx5 manage their own doorbells.
Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'Documentation/networking/devlink')
| -rw-r--r-- | Documentation/networking/devlink/mlx5.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/networking/devlink/mlx5.rst b/Documentation/networking/devlink/mlx5.rst index 60cc9fedf1ef..41c9b716699e 100644 --- a/Documentation/networking/devlink/mlx5.rst +++ b/Documentation/networking/devlink/mlx5.rst @@ -62,6 +62,15 @@ Note: permanent parameters such as ``enable_sriov`` and ``total_vfs`` require FW echo 1 >/sys/bus/pci/rescan grep ^ /sys/bus/pci/devices/0000:01:00.0/sriov_* + * - ``num_doorbells`` + - driverinit + - This controls the number of channel doorbells used by the netdev. In all + cases, an additional doorbell is allocated and used for non-channel + communication (e.g. for PTP, HWS, etc.). Supported values are: + + - 0: No channel-specific doorbells, use the global one for everything. + - [1, max_num_channels]: Spread netdev channels equally across these + doorbells. The ``mlx5`` driver also implements the following driver-specific parameters. |