habanalabs/gaudi: invalidate PMMU mem cache on init

This must be done to clear the internal mem cache so we won't get ecc errors on the first invalidation. Signed-off-by: Oded Gabbay <[email protected]>
chewitt · Sep 1, 2021 · e1b61f8 · e1b61f8
1 parent 6be42f0
commit e1b61f8
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -3905,6 +3905,9 @@ static int gaudi_mmu_init(struct hl_device *hdev)
 	WREG32(mmSTLB_CACHE_INV_BASE_39_8, MMU_CACHE_MNG_ADDR >> 8);
 	WREG32(mmSTLB_CACHE_INV_BASE_49_40, MMU_CACHE_MNG_ADDR >> 40);
 
+	/* mem cache invalidation */
+	WREG32(mmSTLB_MEM_CACHE_INVALIDATION, 1);
+
 	hdev->asic_funcs->mmu_invalidate_cache(hdev, true, 0);
 
 	WREG32(mmMMU_UP_MMU_ENABLE, 1);