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gerrit-public.fairphone.software / kernel / msm-5.4 / a9dcad5e375800fcb07f7617dba23b3aade8f09d / . / arch / arm / plat-omap / include / mach / iommu.h
blob: 769b00b4c34a3e93113fa5cd9bb80bab26c93178 [file] [log] [blame]
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +0200[diff] [blame^]1/*
2 * omap iommu: main structures
3 *
4 * Copyright (C) 2008-2009 Nokia Corporation
5 *
6 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#ifndef __MACH_IOMMU_H
14#define __MACH_IOMMU_H
15
16struct iotlb_entry {
17 u32 da;
18 u32 pa;
19 u32 pgsz, prsvd, valid;
20 union {
21 u16 ap;
22 struct {
23 u32 endian, elsz, mixed;
24 };
25 };
26};
27
28struct iommu {
29 const char *name;
30 struct module *owner;
31 struct clk *clk;
32 void __iomem *regbase;
33 struct device *dev;
34
35 unsigned int refcount;
36 struct mutex iommu_lock; /* global for this whole object */
37
38 /*
39 * We don't change iopgd for a situation like pgd for a task,
40 * but share it globally for each iommu.
41 */
42 u32 *iopgd;
43 spinlock_t page_table_lock; /* protect iopgd */
44
45 int nr_tlb_entries;
46
47 struct list_head mmap;
48 struct mutex mmap_lock; /* protect mmap */
49
50 int (*isr)(struct iommu *obj);
51
52 void *ctx; /* iommu context: registres saved area */
53};
54
55struct cr_regs {
56 union {
57 struct {
58 u16 cam_l;
59 u16 cam_h;
60 };
61 u32 cam;
62 };
63 union {
64 struct {
65 u16 ram_l;
66 u16 ram_h;
67 };
68 u32 ram;
69 };
70};
71
72struct iotlb_lock {
73 short base;
74 short vict;
75};
76
77/* architecture specific functions */
78struct iommu_functions {
79 unsigned long version;
80
81 int (*enable)(struct iommu *obj);
82 void (*disable)(struct iommu *obj);
83 u32 (*fault_isr)(struct iommu *obj, u32 *ra);
84
85 void (*tlb_read_cr)(struct iommu *obj, struct cr_regs *cr);
86 void (*tlb_load_cr)(struct iommu *obj, struct cr_regs *cr);
87
88 struct cr_regs *(*alloc_cr)(struct iommu *obj, struct iotlb_entry *e);
89 int (*cr_valid)(struct cr_regs *cr);
90 u32 (*cr_to_virt)(struct cr_regs *cr);
91 void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
92 ssize_t (*dump_cr)(struct iommu *obj, struct cr_regs *cr, char *buf);
93
94 u32 (*get_pte_attr)(struct iotlb_entry *e);
95
96 void (*save_ctx)(struct iommu *obj);
97 void (*restore_ctx)(struct iommu *obj);
98 ssize_t (*dump_ctx)(struct iommu *obj, char *buf);
99};
100
101struct iommu_platform_data {
102 const char *name;
103 const char *clk_name;
104 const int nr_tlb_entries;
105};
106
107#if defined(CONFIG_ARCH_OMAP1)
108#error "iommu for this processor not implemented yet"
109#else
110#include <mach/iommu2.h>
111#endif
112
113/*
114 * utilities for super page(16MB, 1MB, 64KB and 4KB)
115 */
116
117#define iopgsz_max(bytes) \
118 (((bytes) >= SZ_16M) ? SZ_16M : \
119 ((bytes) >= SZ_1M) ? SZ_1M : \
120 ((bytes) >= SZ_64K) ? SZ_64K : \
121 ((bytes) >= SZ_4K) ? SZ_4K : 0)
122
123#define bytes_to_iopgsz(bytes) \
124 (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M : \
125 ((bytes) == SZ_1M) ? MMU_CAM_PGSZ_1M : \
126 ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K : \
127 ((bytes) == SZ_4K) ? MMU_CAM_PGSZ_4K : -1)
128
129#define iopgsz_to_bytes(iopgsz) \
130 (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M : \
131 ((iopgsz) == MMU_CAM_PGSZ_1M) ? SZ_1M : \
132 ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K : \
133 ((iopgsz) == MMU_CAM_PGSZ_4K) ? SZ_4K : 0)
134
135#define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
136
137/*
138 * global functions
139 */
140extern u32 iommu_arch_version(void);
141
142extern void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
143extern u32 iotlb_cr_to_virt(struct cr_regs *cr);
144
145extern int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e);
146extern void flush_iotlb_page(struct iommu *obj, u32 da);
147extern void flush_iotlb_range(struct iommu *obj, u32 start, u32 end);
148extern void flush_iotlb_all(struct iommu *obj);
149
150extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
151extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
152
153extern struct iommu *iommu_get(const char *name);
154extern void iommu_put(struct iommu *obj);
155
156extern void iommu_save_ctx(struct iommu *obj);
157extern void iommu_restore_ctx(struct iommu *obj);
158
159extern int install_iommu_arch(const struct iommu_functions *ops);
160extern void uninstall_iommu_arch(const struct iommu_functions *ops);
161
162extern int foreach_iommu_device(void *data,
163 int (*fn)(struct device *, void *));
164
165extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf);
166extern size_t dump_tlb_entries(struct iommu *obj, char *buf);
167
168#endif /* __MACH_IOMMU_H */