1 /*
2 * Copyright (c) 2015-2016 MediaTek Inc.
3 * Author: Honghui Zhang <honghui.zhang@mediatek.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #ifndef _MTK_IOMMU_H_
16 #define _MTK_IOMMU_H_
17
18 #include <linux/clk.h>
19 #include <linux/component.h>
20 #include <linux/device.h>
21 #include <linux/io.h>
22 #include <linux/iommu.h>
23 #include <linux/list.h>
24 #include <linux/spinlock.h>
25 #include <soc/mediatek/smi.h>
26
27 #include "io-pgtable.h"
28
29 struct mtk_iommu_suspend_reg {
30 u32 standard_axi_mode;
31 u32 dcm_dis;
32 u32 ctrl_reg;
33 u32 int_control0;
34 u32 int_main_control;
35 u32 ivrp_paddr;
36 };
37
38 enum mtk_iommu_plat {
39 M4U_MT2701,
40 M4U_MT2712,
41 M4U_MT8173,
42 };
43
44 struct mtk_iommu_domain;
45
46 struct mtk_iommu_data {
47 void __iomem *base;
48 int irq;
49 struct device *dev;
50 struct clk *bclk;
51 phys_addr_t protect_base; /* protect memory base */
52 struct mtk_iommu_suspend_reg reg;
53 struct mtk_iommu_domain *m4u_dom;
54 struct iommu_group *m4u_group;
55 struct mtk_smi_iommu smi_imu; /* SMI larb iommu info */
56 bool enable_4GB;
57 bool tlb_flush_active;
58
59 struct iommu_device iommu;
60 enum mtk_iommu_plat m4u_plat;
61
62 struct list_head list;
63 };
64
compare_of(struct device * dev,void * data)65 static inline int compare_of(struct device *dev, void *data)
66 {
67 return dev->of_node == data;
68 }
69
release_of(struct device * dev,void * data)70 static inline void release_of(struct device *dev, void *data)
71 {
72 of_node_put(data);
73 }
74
mtk_iommu_bind(struct device * dev)75 static inline int mtk_iommu_bind(struct device *dev)
76 {
77 struct mtk_iommu_data *data = dev_get_drvdata(dev);
78
79 return component_bind_all(dev, &data->smi_imu);
80 }
81
mtk_iommu_unbind(struct device * dev)82 static inline void mtk_iommu_unbind(struct device *dev)
83 {
84 struct mtk_iommu_data *data = dev_get_drvdata(dev);
85
86 component_unbind_all(dev, &data->smi_imu);
87 }
88
89 #endif
90
