mirror of https://gitee.com/openkylin/linux.git
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2019, The Linux Foundation. All rights reserved.
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*/
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#include <linux/qcom_scm.h>
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#include "arm-smmu.h"
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struct qcom_smmu {
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struct arm_smmu_device smmu;
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};
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static int qcom_sdm845_smmu500_reset(struct arm_smmu_device *smmu)
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{
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int ret;
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arm_mmu500_reset(smmu);
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/*
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* To address performance degradation in non-real time clients,
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* such as USB and UFS, turn off wait-for-safe on sdm845 based boards,
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* such as MTP and db845, whose firmwares implement secure monitor
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* call handlers to turn on/off the wait-for-safe logic.
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*/
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ret = qcom_scm_qsmmu500_wait_safe_toggle(0);
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if (ret)
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dev_warn(smmu->dev, "Failed to turn off SAFE logic\n");
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return ret;
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}
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static const struct arm_smmu_impl qcom_smmu_impl = {
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.reset = qcom_sdm845_smmu500_reset,
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};
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struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
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{
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struct qcom_smmu *qsmmu;
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qsmmu = devm_kzalloc(smmu->dev, sizeof(*qsmmu), GFP_KERNEL);
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if (!qsmmu)
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return ERR_PTR(-ENOMEM);
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qsmmu->smmu = *smmu;
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qsmmu->smmu.impl = &qcom_smmu_impl;
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devm_kfree(smmu->dev, smmu);
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return &qsmmu->smmu;
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}
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