| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (c) 2019, The Linux Foundation. All rights reserved. |
| */ |
| |
| #include <linux/of_device.h> |
| #include <linux/qcom_scm.h> |
| |
| #include "arm-smmu.h" |
| |
| struct qcom_smmu { |
| struct arm_smmu_device smmu; |
| }; |
| |
| static const struct of_device_id qcom_smmu_client_of_match[] = { |
| { .compatible = "qcom,adreno" }, |
| { .compatible = "qcom,mdp4" }, |
| { .compatible = "qcom,mdss" }, |
| { .compatible = "qcom,sc7180-mdss" }, |
| { .compatible = "qcom,sc7180-mss-pil" }, |
| { .compatible = "qcom,sdm845-mdss" }, |
| { .compatible = "qcom,sdm845-mss-pil" }, |
| { } |
| }; |
| |
| static int qcom_smmu_def_domain_type(struct device *dev) |
| { |
| const struct of_device_id *match = |
| of_match_device(qcom_smmu_client_of_match, dev); |
| |
| return match ? IOMMU_DOMAIN_IDENTITY : 0; |
| } |
| |
| static int qcom_sdm845_smmu500_reset(struct arm_smmu_device *smmu) |
| { |
| int ret; |
| |
| /* |
| * 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 int qcom_smmu500_reset(struct arm_smmu_device *smmu) |
| { |
| const struct device_node *np = smmu->dev->of_node; |
| |
| arm_mmu500_reset(smmu); |
| |
| if (of_device_is_compatible(np, "qcom,sdm845-smmu-500")) |
| return qcom_sdm845_smmu500_reset(smmu); |
| |
| return 0; |
| } |
| |
| static const struct arm_smmu_impl qcom_smmu_impl = { |
| .def_domain_type = qcom_smmu_def_domain_type, |
| .reset = qcom_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; |
| } |