[PATCH v4 6/6] drm/xe/pf: Invalidate LMTT after completing changes

[Michal Wajdeczko]

Once we finish populating all leaf pages in the VF's LMTT we should
make sure that hardware will not access any stale data. Explicitly
force LMTT invalidation (as it was already planned in the past).

Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Michał Winiarski <michal.winiarski at intel.com>
Cc: Piotr Piórkowski <piotr.piorkowski at intel.com>
---
 drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c
index 86dade6f1083..0e1c1c19e011 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c
@@ -1347,7 +1347,17 @@ static int pf_distribute_config_lmem(struct xe_gt *gt, unsigned int vfid, u64 si
 
 static void pf_force_lmtt_invalidate(struct xe_device *xe)
 {
-	/* TODO */
+	struct xe_lmtt *lmtt;
+	struct xe_tile *tile;
+	unsigned int tid;
+
+	xe_assert(xe, xe_device_has_lmtt(xe));
+	xe_assert(xe, IS_SRIOV_PF(xe));
+
+	for_each_tile(tile, xe, tid) {
+		lmtt = &tile->sriov.pf.lmtt;
+		xe_lmtt_invalidate_hw(lmtt);
+	}
 }
 
 static void pf_reset_vf_lmtt(struct xe_device *xe, unsigned int vfid)
-- 
2.47.1