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 <linux/dma-mapping.h>
19 #include <soc/mediatek/smi.h>
20
21 #define MTK_LARB_COM_MAX 8
22 #define MTK_LARB_SUBCOM_MAX 4
23
24 struct mtk_iommu_suspend_reg {
25 union {
26 u32 standard_axi_mode;/* v1 */
27 u32 misc_ctrl;/* v2 */
28 };
29 u32 dcm_dis;
30 u32 ctrl_reg;
31 u32 int_control0;
32 u32 int_main_control;
33 u32 ivrp_paddr;
34 u32 vld_pa_rng;
35 u32 wr_len_ctrl;
36 };
37
38 enum mtk_iommu_plat {
39 M4U_MT2701,
40 M4U_MT2712,
41 M4U_MT6779,
42 M4U_MT8167,
43 M4U_MT8173,
44 M4U_MT8183,
45 };
46
47 struct mtk_iommu_plat_data {
48 enum mtk_iommu_plat m4u_plat;
49 u32 flags;
50 u32 inv_sel_reg;
51 unsigned char larbid_remap[MTK_LARB_COM_MAX][MTK_LARB_SUBCOM_MAX];
52 };
53
54 struct mtk_iommu_domain;
55
56 struct mtk_iommu_data {
57 void __iomem *base;
58 int irq;
59 struct device *dev;
60 struct clk *bclk;
61 phys_addr_t protect_base; /* protect memory base */
62 struct mtk_iommu_suspend_reg reg;
63 struct mtk_iommu_domain *m4u_dom;
64 struct iommu_group *m4u_group;
65 bool enable_4GB;
66 spinlock_t tlb_lock; /* lock for tlb range flush */
67
68 struct iommu_device iommu;
69 const struct mtk_iommu_plat_data *plat_data;
70
71 struct dma_iommu_mapping *mapping; /* For mtk_iommu_v1.c */
72
73 struct list_head list;
74 struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX];
75 };
76
compare_of(struct device * dev,void * data)77 static inline int compare_of(struct device *dev, void *data)
78 {
79 return dev->of_node == data;
80 }
81
release_of(struct device * dev,void * data)82 static inline void release_of(struct device *dev, void *data)
83 {
84 of_node_put(data);
85 }
86
mtk_iommu_bind(struct device * dev)87 static inline int mtk_iommu_bind(struct device *dev)
88 {
89 struct mtk_iommu_data *data = dev_get_drvdata(dev);
90
91 return component_bind_all(dev, &data->larb_imu);
92 }
93
mtk_iommu_unbind(struct device * dev)94 static inline void mtk_iommu_unbind(struct device *dev)
95 {
96 struct mtk_iommu_data *data = dev_get_drvdata(dev);
97
98 component_unbind_all(dev, &data->larb_imu);
99 }
100
101 #endif
102
