From: Oded Gabbay <ogabbay@kernel.org>
Date: Tue, 17 Aug 2021 10:36:06 +0000 (+0300)
Subject: habanalabs/gaudi: invalidate PMMU mem cache on init
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e1b61f8e975ae3de555b9fa1f2939f47c70afeba;p=linux.git

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 <ogabbay@kernel.org>
---

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index a41e2ddff9c7b..0a265dfee78f1 100644
--- 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);