linux-kernel - [PATCH 1/3] habanalabs/gaudi: remove axi drain support

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Message-Id: <20200916134333.4029-1-oded.gabbay@gmail.com>
Date:   Wed, 16 Sep 2020 16:43:31 +0300
From:   Oded Gabbay <oded.gabbay@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     SW_Drivers@...ana.ai
Subject: [PATCH 1/3] habanalabs/gaudi: remove axi drain support

AXI drain is broken in GAUDI so remove support for enabling it.

Signed-off-by: Oded Gabbay <oded.gabbay@...il.com>
---
 drivers/misc/habanalabs/gaudi/gaudi.c | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 6f7f6ad7a358..2c10e3f92c86 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -2885,22 +2885,6 @@ static void gaudi_pre_hw_init(struct hl_device *hdev)
 	 */
 	RREG32(mmPCIE_WRAP_LBW_PROT_OVR);
 
-	if (hdev->axi_drain) {
-		WREG32(mmPCIE_WRAP_LBW_DRAIN_CFG,
-			1 << PCIE_WRAP_LBW_DRAIN_CFG_EN_SHIFT);
-		WREG32(mmPCIE_WRAP_HBW_DRAIN_CFG,
-			1 << PCIE_WRAP_HBW_DRAIN_CFG_EN_SHIFT);
-
-		/* Perform read to flush the DRAIN cfg */
-		RREG32(mmPCIE_WRAP_HBW_DRAIN_CFG);
-	} else {
-		WREG32(mmPCIE_WRAP_LBW_DRAIN_CFG, 0);
-		WREG32(mmPCIE_WRAP_HBW_DRAIN_CFG, 0);
-
-		/* Perform read to flush the DRAIN cfg */
-		RREG32(mmPCIE_WRAP_HBW_DRAIN_CFG);
-	}
-
 	/* Configure the reset registers. Must be done as early as possible
 	 * in case we fail during H/W initialization
 	 */
-- 
2.17.1