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iommu/arm-smmu: update debug logs for qsmmuv2 sync timeout

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Add debug registers to dump in the event of sync timeout for qsmmuv2.

Change-Id: I18cc3296e74ca0e2cb6f68f8aca67032d493410b
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
This commit is contained in:
Prakash Gupta 2021-02-17 10:21:29 +05:30 • committed by Gerrit - the friendly Code Review server
commit 5f1ea1aa0c
1 changed files with 12 additions and 1 deletions
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13
drivers/iommu/arm-smmu-qcom.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2019-2021, The Linux Foundation. All rights reserved.
*/
#include <linux/bitfield.h>
@ -20,6 +20,8 @@
#include <linux/uaccess.h>
#define IMPL_DEF4_MICRO_MMU_CTRL 0
#define IMPL_DEF4_CLK_ON_STATUS 0x50
#define IMPL_DEF4_CLK_ON_CLIENT_STATUS 0x54
#define MICRO_MMU_CTRL_LOCAL_HALT_REQ BIT(2)
#define MICRO_MMU_CTRL_IDLE BIT(3)
@ -193,8 +195,17 @@ static phys_addr_t qsmmuv2_iova_to_phys_hard(
static void qsmmuv2_tlb_sync_timeout(struct arm_smmu_device *smmu)
{
u32 clk_on, clk_on_client;
dev_err_ratelimited(smmu->dev,
"TLB sync timed out -- SMMU may be deadlocked\n");
clk_on = arm_smmu_readl(smmu, ARM_SMMU_IMPL_DEF4,
IMPL_DEF4_CLK_ON_STATUS);
clk_on_client = arm_smmu_readl(smmu, ARM_SMMU_IMPL_DEF4,
IMPL_DEF4_CLK_ON_CLIENT_STATUS);
dev_err_ratelimited(smmu->dev,
"clk on 0x%x, clk on client 0x%x status\n",
clk_on, clk_on_client);
BUG_ON(IS_ENABLED(CONFIG_IOMMU_TLBSYNC_DEBUG));
}