[PATCH 1/8] drm/xe/guc: Enable w/a 16026508708

[Daniele Ceraolo Spurio]

On 4/3/2025 11:56 AM, John.C.Harrison at Intel.com wrote:
> From: John Harrison <John.C.Harrison at Intel.com>
>
> The workaround is only relevant to SRIOV but does affect all platforms.
>
> Signed-off-by: John Harrison <John.C.Harrison at Intel.com>

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>

Daniele

> ---
>   drivers/gpu/drm/xe/abi/guc_klvs_abi.h | 1 +
>   drivers/gpu/drm/xe/xe_guc_ads.c       | 5 +++++
>   drivers/gpu/drm/xe/xe_wa_oob.rules    | 2 ++
>   3 files changed, 8 insertions(+)
>
> diff --git a/drivers/gpu/drm/xe/abi/guc_klvs_abi.h b/drivers/gpu/drm/xe/abi/guc_klvs_abi.h
> index d633f1c739e4..7de8f827281f 100644
> --- a/drivers/gpu/drm/xe/abi/guc_klvs_abi.h
> +++ b/drivers/gpu/drm/xe/abi/guc_klvs_abi.h
> @@ -367,6 +367,7 @@ enum xe_guc_klv_ids {
>   	GUC_WA_KLV_NP_RD_WRITE_TO_CLEAR_RCSM_AT_CGP_LATE_RESTORE			= 0x9008,
>   	GUC_WORKAROUND_KLV_ID_BACK_TO_BACK_RCS_ENGINE_RESET				= 0x9009,
>   	GUC_WA_KLV_WAKE_POWER_DOMAINS_FOR_OUTBOUND_MMIO					= 0x900a,
> +	GUC_WA_KLV_RESET_BB_STACK_PTR_ON_VF_SWITCH					= 0x900b,
>   };
>   
>   #endif
> diff --git a/drivers/gpu/drm/xe/xe_guc_ads.c b/drivers/gpu/drm/xe/xe_guc_ads.c
> index bee4e0cfe7b8..9de8c2b81f0d 100644
> --- a/drivers/gpu/drm/xe/xe_guc_ads.c
> +++ b/drivers/gpu/drm/xe/xe_guc_ads.c
> @@ -376,6 +376,11 @@ static void guc_waklv_init(struct xe_guc_ads *ads)
>   					GUC_WORKAROUND_KLV_ID_BACK_TO_BACK_RCS_ENGINE_RESET,
>   					&offset, &remain);
>   
> +	if (GUC_FIRMWARE_VER(&gt->uc.guc) >= MAKE_GUC_VER(70, 44, 0) && XE_WA(gt, 16026508708))
> +		guc_waklv_enable_simple(ads,
> +					GUC_WA_KLV_RESET_BB_STACK_PTR_ON_VF_SWITCH,
> +					&offset, &remain);
> +
>   	size = guc_ads_waklv_size(ads) - remain;
>   	if (!size)
>   		return;
> diff --git a/drivers/gpu/drm/xe/xe_wa_oob.rules b/drivers/gpu/drm/xe/xe_wa_oob.rules
> index 9b9e176992a8..9efc5accd43d 100644
> --- a/drivers/gpu/drm/xe/xe_wa_oob.rules
> +++ b/drivers/gpu/drm/xe/xe_wa_oob.rules
> @@ -57,3 +57,5 @@ no_media_l3	MEDIA_VERSION(3000)
>   		GRAPHICS_VERSION(1260), GRAPHICS_STEP(A0, B0)
>   16023105232	GRAPHICS_VERSION_RANGE(2001, 3001)
>   		MEDIA_VERSION_RANGE(1301, 3000)
> +16026508708	GRAPHICS_VERSION_RANGE(1200, 3001)
> +		MEDIA_VERSION_RANGE(1300, 3000)