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