[PATCH 1/2] drm/xe/vf: Don't try Driver-FLR if VF

[Ghimiray, Himal Prasad]

On 11-03-2025 19:27, Michal Wajdeczko wrote:
> Driver-FLR can't be triggered from the VF driver, so treat it
> as disabled if VF. While around, fix also the message, as it
> shouldn't be printed just 'once' as we may have many devices.
> 

does it need fixes tag ?

> Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
> ---
>   drivers/gpu/drm/xe/xe_device.c | 14 ++++++++++----
>   1 file changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
> index 5d79b439dd62..a2afa8a88997 100644
> --- a/drivers/gpu/drm/xe/xe_device.c
> +++ b/drivers/gpu/drm/xe/xe_device.c
> @@ -504,7 +504,15 @@ ALLOW_ERROR_INJECTION(xe_device_create, ERRNO); /* See xe_pci_probe() */
>   
>   static bool xe_driver_flr_disabled(struct xe_device *xe)
>   {
> -	return xe_mmio_read32(xe_root_tile_mmio(xe), GU_CNTL_PROTECTED) & DRIVERINT_FLR_DIS;
> +	if (IS_SRIOV_VF(xe))
> +		return true;
> +
> +	if (xe_mmio_read32(xe_root_tile_mmio(xe), GU_CNTL_PROTECTED) & DRIVERINT_FLR_DIS) {
> +		drm_info(&xe->drm, "Driver-FLR disabled by BIOS\n");
> +		return true;
> +	}
> +
> +	return false;
>   }
>   
>   /*
> @@ -568,10 +576,8 @@ static void __xe_driver_flr(struct xe_device *xe)
>   
>   static void xe_driver_flr(struct xe_device *xe)
>   {
> -	if (xe_driver_flr_disabled(xe)) {
> -		drm_info_once(&xe->drm, "BIOS Disabled Driver-FLR\n");
> +	if (xe_driver_flr_disabled(xe))
>   		return;
> -	}

Change LGTM
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>

>   
>   	__xe_driver_flr(xe);
>   }