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 bool tlb_flush_active;
61 spinlock_t tlb_lock; /* lock for tlb range flush */
62
63 struct iommu_device iommu;
64 const struct mtk_iommu_plat_data *plat_data;
65
66 struct list_head list;
67 struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX];
68 };
69
compare_of(struct device * dev,void * data)70 static inline int compare_of(struct device *dev, void *data)
71 {
72 return dev->of_node == data;
73 }
74
release_of(struct device * dev,void * data)75 static inline void release_of(struct device *dev, void *data)
76 {
77 of_node_put(data);
78 }
79
mtk_iommu_bind(struct device * dev)80 static inline int mtk_iommu_bind(struct device *dev)
81 {
82 struct mtk_iommu_data *data = dev_get_drvdata(dev);
83
84 return component_bind_all(dev, &data->larb_imu);
85 }
86
mtk_iommu_unbind(struct device * dev)87 static inline void mtk_iommu_unbind(struct device *dev)
88 {
89 struct mtk_iommu_data *data = dev_get_drvdata(dev);
90
91 component_unbind_all(dev, &data->larb_imu);
92 }
93
94 #endif
95