From: Oded Gabbay <oded.gabbay@gmail.com>
To: linux-kernel@vger.kernel.org, SW_Drivers@habana.ai
Cc: gregkh@linuxfoundation.org, Omer Shpigelman <oshpigelman@habana.ai>
Subject: [PATCH 1/4] habanalabs: improve MMU cache invalidation code
Date: Thu, 21 May 2020 10:02:02 +0300 [thread overview]
Message-ID: <20200521070205.26673-1-oded.gabbay@gmail.com> (raw)
From: Omer Shpigelman <oshpigelman@habana.ai>
A new sequence is introduced to invalidate the MMU cache in order to avoid
timeouts.
Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
drivers/misc/habanalabs/gaudi/gaudi.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 4cb1f71dd4f1..093384731f0d 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -5982,16 +5982,18 @@ static void gaudi_mmu_invalidate_cache(struct hl_device *hdev, bool is_hard,
timeout_usec = MMU_CONFIG_TIMEOUT_USEC;
/* L0 & L1 invalidation */
- WREG32(mmSTLB_INV_ALL_START, 1);
+ WREG32(mmSTLB_INV_PS, 2);
rc = hl_poll_timeout(
hdev,
- mmSTLB_INV_ALL_START,
+ mmSTLB_INV_PS,
status,
!status,
1000,
timeout_usec);
+ WREG32(mmSTLB_INV_SET, 0);
+
if (rc)
dev_notice_ratelimited(hdev->dev,
"Timeout when waiting for MMU cache invalidation\n");
--
2.17.1
next reply other threads:[~2020-05-21 7:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-21 7:02 Oded Gabbay [this message]
2020-05-21 7:02 ` [PATCH 2/4] habanalabs: add print for soft reset due to event Oded Gabbay
2020-05-21 7:02 ` [PATCH 3/4] habanalabs: GAUDI does not support soft-reset Oded Gabbay
2020-05-21 7:41 ` Tomer Tayar
2020-05-21 7:02 ` [PATCH 4/4] habanalabs: don't allow hard reset with open processes Oded Gabbay
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