Commit ef3fcfe0 authored by Michal Wajdeczko's avatar Michal Wajdeczko
Browse files

drm/xe/vf: Don't use register based TLB invalidation if VF 



VF drivers can only use GuC-based TLB invalidation, as they don't
have access to the related registers. However, VFs shouldn't need
any explicit TLB invalidation before enabling CTB communication,
as there will be an implicit GGTT TLB invalidation issued by the
GuC itself as part of MMIO-based action handling.

Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: default avatarPiotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240619214557.905-8-michal.wajdeczko@intel.com
parent ecab82af

drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c

+4 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include "xe_guc.h"

#include "xe_guc_ct.h"

#include "xe_mmio.h"

#include "xe_sriov.h"

#include "xe_trace.h"

#include "regs/xe_guc_regs.h"
@@ -249,6 +250,9 @@ int xe_gt_tlb_invalidation_ggtt(struct xe_gt *gt) 


		xe_gt_tlb_invalidation_wait(gt, seqno);

	} else if (xe_device_uc_enabled(xe) && !xe_device_wedged(xe)) {

		if (IS_SRIOV_VF(xe))

			return 0;



		xe_gt_WARN_ON(gt, xe_force_wake_get(gt_to_fw(gt), XE_FW_GT));

		if (xe->info.platform == XE_PVC || GRAPHICS_VER(xe) >= 20) {

			xe_mmio_write32(gt, PVC_GUC_TLB_INV_DESC1,