Re: [PATCH 9/9] drm/xe/pf: Add documentation for vram_quota

["Piotr Piórkowski" <piotr.piorkowski@intel.com>]

Michal Wajdeczko <michal.wajdeczko@intel.com> wrote on nie [2026-lut-15 21:33:23 +0100]:
> Add initial documentation for recently added VRAM provisioning
> Xe driver specific SR-IOV sysfs files under device/sriov_admin.
> 
> Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> ---
>  .../ABI/testing/sysfs-driver-intel-xe-sriov   | 31 +++++++++++++++++++
>  1 file changed, 31 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-driver-intel-xe-sriov b/Documentation/ABI/testing/sysfs-driver-intel-xe-sriov
> index 7f5ef9eada53..14b61bd2d602 100644
> --- a/Documentation/ABI/testing/sysfs-driver-intel-xe-sriov
> +++ b/Documentation/ABI/testing/sysfs-driver-intel-xe-sriov
> @@ -129,6 +129,37 @@ Description:
>  			-EIO if FW refuses to change the provisioning.
>  
>  
> +What:		/sys/bus/pci/drivers/xe/.../sriov_admin/.bulk_profile/vram_quota
> +What:		/sys/bus/pci/drivers/xe/.../sriov_admin/vf<n>/profile/vram_quota
> +Date:		February 2026
> +KernelVersion:	7.0
> +Contact:	intel-xe@lists.freedesktop.org
> +Description:
> +		These files allow to perform initial VFs VRAM provisioning prior to VFs
> +		enabling or to change VFs VRAM provisioning once the VFs are enabled.
> +		Any non-zero initial VRAM provisioning will block VFs auto-provisioning.
> +		Without initial VRAM provisioning those files will show result of the
> +		VRAM auto-provisioning performed by the PF once the VFs are enabled.
> +		Once the VFs are disabled, all VRAM provisioning will be released.
> +		These files are visible only on discrete Intel Xe platforms with VRAM
> +		and are writeable only if dynamic VFs VRAM provisioning is supported.
> +
> +		.bulk_profile/vram_quota: (WO) unsigned integer
> +			The amount of the provisioned VRAM in [bytes] for each VF.
> +			Actual final value might be aligned per HW/FW requirements.
> +
> +		profile/vram_quota: (RW) unsigned integer
> +			The amount of the provisioned VRAM in [bytes] for this VF.
> +			Actual quantum value might be aligned per HW/FW requirements.

Copy-paste from exec_quantum_ms ? :)
> +
> +			Default is 0 (unprovisioned).
> +
> +		Writes to these attributes may fail with errors like:
> +			-EINVAL if provided input is malformed or not recognized,
> +			-EPERM if change is not applicable on given HW/FW,
> +			-EIO if FW refuses to change the provisioning.
> +
> +
>  What:		/sys/bus/pci/drivers/xe/.../sriov_admin/vf<n>/stop
>  Date:		October 2025
>  KernelVersion:	6.19


With fix:
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>

> -- 
> 2.47.1
> 

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