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devlink: Add 'total_vfs' generic device param

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NICs are typically configured with total_vfs=0, forcing users to rely
on external tools to enable SR-IOV (a widely used and essential feature).

Add total_vfs parameter to devlink for SR-IOV max VF configurability.
Enables standard kernel tools to manage SR-IOV, addressing the need for
flexible VF configuration.

Signed-off-by: Vlad Dumitrescu <vdumitrescu@nvidia.com>
Tested-by: Kamal Heib <kheib@redhat.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250907012953.301746-2-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Vlad Dumitrescu
2025-09-06 18:29:43 -07:00
committed by Jakub Kicinski
parent b90c7ca4f9
commit ce0b015e26
3 changed files with 14 additions and 0 deletions
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5
Documentation/networking/devlink/devlink-params.rst
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@@ -143,3 +143,8 @@ own name.
* - ``clock_id``
- u64
- Clock ID used by the device for registering DPLL devices and pins.
* - ``total_vfs``
- u32
- The max number of Virtual Functions (VFs) exposed by the PF.
after reboot/pci reset, 'sriov_totalvfs' entry under the device's sysfs
directory will report this value.