// 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; }