projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 759aaa10 VG |
1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* | |
| 3 | * Copyright (c) 2019, The Linux Foundation. All rights reserved. | |
| 4 | */ | |
| 5 | ||
| 0e764a01 | 6 | #include <linux/of_device.h> |
| 759aaa10 VG |
7 | #include <linux/qcom_scm.h> |
| 8 | ||
| 9 | #include "arm-smmu.h" | |
| 10 | ||
| 11 | struct qcom_smmu { | |
| 12 | struct arm_smmu_device smmu; | |
| 13 | }; | |
| 14 | ||
| 0e764a01 JC |
15 | static const struct of_device_id qcom_smmu_client_of_match[] = { |
| 16 | { .compatible = "qcom,adreno" }, | |
| 17 | { .compatible = "qcom,mdp4" }, | |
| 18 | { .compatible = "qcom,mdss" }, | |
| 19 | { .compatible = "qcom,sc7180-mdss" }, | |
| d100ff38 | 20 | { .compatible = "qcom,sc7180-mss-pil" }, |
| 0e764a01 | 21 | { .compatible = "qcom,sdm845-mdss" }, |
| d100ff38 | 22 | { .compatible = "qcom,sdm845-mss-pil" }, |
| 0e764a01 JC |
23 | { } |
| 24 | }; | |
| 25 | ||
| 26 | static int qcom_smmu_def_domain_type(struct device *dev) | |
| 27 | { | |
| 28 | const struct of_device_id *match = | |
| 29 | of_match_device(qcom_smmu_client_of_match, dev); | |
| 30 | ||
| 31 | return match ? IOMMU_DOMAIN_IDENTITY : 0; | |
| 32 | } | |
| 33 | ||
| 759aaa10 VG |
34 | static int qcom_sdm845_smmu500_reset(struct arm_smmu_device *smmu) |
| 35 | { | |
| 36 | int ret; | |
| 37 | ||
| 759aaa10 VG |
38 | /* |
| 39 | * To address performance degradation in non-real time clients, | |
| 40 | * such as USB and UFS, turn off wait-for-safe on sdm845 based boards, | |
| 41 | * such as MTP and db845, whose firmwares implement secure monitor | |
| 42 | * call handlers to turn on/off the wait-for-safe logic. | |
| 43 | */ | |
| 44 | ret = qcom_scm_qsmmu500_wait_safe_toggle(0); | |
| 45 | if (ret) | |
| 46 | dev_warn(smmu->dev, "Failed to turn off SAFE logic\n"); | |
| 47 | ||
| 48 | return ret; | |
| 49 | } | |
| 50 | ||
| 64510ede SPR |
51 | static int qcom_smmu500_reset(struct arm_smmu_device *smmu) |
| 52 | { | |
| 53 | const struct device_node *np = smmu->dev->of_node; | |
| 54 | ||
| 55 | arm_mmu500_reset(smmu); | |
| 56 | ||
| 57 | if (of_device_is_compatible(np, "qcom,sdm845-smmu-500")) | |
| 58 | return qcom_sdm845_smmu500_reset(smmu); | |
| 59 | ||
| 60 | return 0; | |
| 61 | } | |
| 62 | ||
| 759aaa10 | 63 | static const struct arm_smmu_impl qcom_smmu_impl = { |
| 0e764a01 | 64 | .def_domain_type = qcom_smmu_def_domain_type, |
| 64510ede | 65 | .reset = qcom_smmu500_reset, |
| 759aaa10 VG |
66 | }; |
| 67 | ||
| 68 | struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu) | |
| 69 | { | |
| 70 | struct qcom_smmu *qsmmu; | |
| 71 | ||
| 72 | qsmmu = devm_kzalloc(smmu->dev, sizeof(*qsmmu), GFP_KERNEL); | |
| 73 | if (!qsmmu) | |
| 74 | return ERR_PTR(-ENOMEM); | |
| 75 | ||
| 76 | qsmmu->smmu = *smmu; | |
| 77 | ||
| 78 | qsmmu->smmu.impl = &qcom_smmu_impl; | |
| 79 | devm_kfree(smmu->dev, smmu); | |
| 80 | ||
| 81 | return &qsmmu->smmu; | |
| 82 | } |