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1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (c) 2015-2016 MediaTek Inc.
4  * Author: Honghui Zhang <honghui.zhang@mediatek.com>
5  */
6
7 #ifndef _MTK_IOMMU_H_
8 #define _MTK_IOMMU_H_
9
10 #include <linux/clk.h>
11 #include <linux/component.h>
12 #include <linux/device.h>
13 #include <linux/io.h>
14 #include <linux/io-pgtable.h>
15 #include <linux/iommu.h>
16 #include <linux/list.h>
17 #include <linux/spinlock.h>
18 #include <soc/mediatek/smi.h>
19
20 struct mtk_iommu_suspend_reg {
21         u32                             standard_axi_mode;
22         u32                             dcm_dis;
23         u32                             ctrl_reg;
24         u32                             int_control0;
25         u32                             int_main_control;
26         u32                             ivrp_paddr;
27         u32                             vld_pa_rng;
28 };
29
30 enum mtk_iommu_plat {
31         M4U_MT2701,
32         M4U_MT2712,
33         M4U_MT8173,
34         M4U_MT8183,
35 };
36
37 struct mtk_iommu_plat_data {
38         enum mtk_iommu_plat m4u_plat;
39         bool                has_4gb_mode;
40
41         /* HW will use the EMI clock if there isn't the "bclk". */
42         bool                has_bclk;
43         bool                has_vld_pa_rng;
44         bool                reset_axi;
45         unsigned char       larbid_remap[MTK_LARB_NR_MAX];
46 };
47
48 struct mtk_iommu_domain;
49
50 struct mtk_iommu_data {
51         void __iomem                    *base;
52         int                             irq;
53         struct device                   *dev;
54         struct clk                      *bclk;
55         phys_addr_t                     protect_base; /* protect memory base */
56         struct mtk_iommu_suspend_reg    reg;
57         struct mtk_iommu_domain         *m4u_dom;
58         struct iommu_group              *m4u_group;
59         bool                            enable_4GB;
60         spinlock_t                      tlb_lock; /* lock for tlb range flush */
61
62         struct iommu_device             iommu;
63         const struct mtk_iommu_plat_data *plat_data;
64
65         struct dma_iommu_mapping        *mapping; /* For mtk_iommu_v1.c */
66
67         struct list_head                list;
68         struct mtk_smi_larb_iommu       larb_imu[MTK_LARB_NR_MAX];
69 };
70
71 static inline int compare_of(struct device *dev, void *data)
72 {
73         return dev->of_node == data;
74 }
75
76 static inline void release_of(struct device *dev, void *data)
77 {
78         of_node_put(data);
79 }
80
81 static inline int mtk_iommu_bind(struct device *dev)
82 {
83         struct mtk_iommu_data *data = dev_get_drvdata(dev);
84
85         return component_bind_all(dev, &data->larb_imu);
86 }
87
88 static inline void mtk_iommu_unbind(struct device *dev)
89 {
90         struct mtk_iommu_data *data = dev_get_drvdata(dev);
91
92         component_unbind_all(dev, &data->larb_imu);
93 }
94
95 #endif
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