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-rw-r--r--arch/arm/plat-omap/include/plat/iommu.h180
1 files changed, 180 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/iommu.h b/arch/arm/plat-omap/include/plat/iommu.h
new file mode 100644
index 00000000000..7a6ec98a08e
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+++ b/arch/arm/plat-omap/include/plat/iommu.h
@@ -0,0 +1,180 @@
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 omap_iommu {
29 const char *name;
30 struct module *owner;
31 struct clk *clk;
32 void __iomem *regbase;
33 struct device *dev;
34 void *isr_priv;
35 struct iommu_domain *domain;
36
37 unsigned int refcount;
38 spinlock_t iommu_lock; /* global for this whole object */
39
40 /*
41 * We don't change iopgd for a situation like pgd for a task,
42 * but share it globally for each iommu.
43 */
44 u32 *iopgd;
45 spinlock_t page_table_lock; /* protect iopgd */
46
47 int nr_tlb_entries;
48
49 struct list_head mmap;
50 struct mutex mmap_lock; /* protect mmap */
51
52 void *ctx; /* iommu context: registres saved area */
53 u32 da_start;
54 u32 da_end;
55};
56
57struct cr_regs {
58 union {
59 struct {
60 u16 cam_l;
61 u16 cam_h;
62 };
63 u32 cam;
64 };
65 union {
66 struct {
67 u16 ram_l;
68 u16 ram_h;
69 };
70 u32 ram;
71 };
72};
73
74struct iotlb_lock {
75 short base;
76 short vict;
77};
78
79/* architecture specific functions */
80struct iommu_functions {
81 unsigned long version;
82
83 int (*enable)(struct omap_iommu *obj);
84 void (*disable)(struct omap_iommu *obj);
85 void (*set_twl)(struct omap_iommu *obj, bool on);
86 u32 (*fault_isr)(struct omap_iommu *obj, u32 *ra);
87
88 void (*tlb_read_cr)(struct omap_iommu *obj, struct cr_regs *cr);
89 void (*tlb_load_cr)(struct omap_iommu *obj, struct cr_regs *cr);
90
91 struct cr_regs *(*alloc_cr)(struct omap_iommu *obj,
92 struct iotlb_entry *e);
93 int (*cr_valid)(struct cr_regs *cr);
94 u32 (*cr_to_virt)(struct cr_regs *cr);
95 void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
96 ssize_t (*dump_cr)(struct omap_iommu *obj, struct cr_regs *cr,
97 char *buf);
98
99 u32 (*get_pte_attr)(struct iotlb_entry *e);
100
101 void (*save_ctx)(struct omap_iommu *obj);
102 void (*restore_ctx)(struct omap_iommu *obj);
103 ssize_t (*dump_ctx)(struct omap_iommu *obj, char *buf, ssize_t len);
104};
105
106struct iommu_platform_data {
107 const char *name;
108 const char *clk_name;
109 const int nr_tlb_entries;
110 u32 da_start;
111 u32 da_end;
112};
113
114/* IOMMU errors */
115#define OMAP_IOMMU_ERR_TLB_MISS (1 << 0)
116#define OMAP_IOMMU_ERR_TRANS_FAULT (1 << 1)
117#define OMAP_IOMMU_ERR_EMU_MISS (1 << 2)
118#define OMAP_IOMMU_ERR_TBLWALK_FAULT (1 << 3)
119#define OMAP_IOMMU_ERR_MULTIHIT_FAULT (1 << 4)
120
121#if defined(CONFIG_ARCH_OMAP1)
122#error "iommu for this processor not implemented yet"
123#else
124#include <plat/iommu2.h>
125#endif
126
127/*
128 * utilities for super page(16MB, 1MB, 64KB and 4KB)
129 */
130
131#define iopgsz_max(bytes) \
132 (((bytes) >= SZ_16M) ? SZ_16M : \
133 ((bytes) >= SZ_1M) ? SZ_1M : \
134 ((bytes) >= SZ_64K) ? SZ_64K : \
135 ((bytes) >= SZ_4K) ? SZ_4K : 0)
136
137#define bytes_to_iopgsz(bytes) \
138 (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M : \
139 ((bytes) == SZ_1M) ? MMU_CAM_PGSZ_1M : \
140 ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K : \
141 ((bytes) == SZ_4K) ? MMU_CAM_PGSZ_4K : -1)
142
143#define iopgsz_to_bytes(iopgsz) \
144 (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M : \
145 ((iopgsz) == MMU_CAM_PGSZ_1M) ? SZ_1M : \
146 ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K : \
147 ((iopgsz) == MMU_CAM_PGSZ_4K) ? SZ_4K : 0)
148
149#define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
150
151/*
152 * global functions
153 */
154extern u32 omap_iommu_arch_version(void);
155
156extern void omap_iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
157
158extern int
159omap_iopgtable_store_entry(struct omap_iommu *obj, struct iotlb_entry *e);
160
161extern int omap_iommu_set_isr(const char *name,
162 int (*isr)(struct omap_iommu *obj, u32 da, u32 iommu_errs,
163 void *priv),
164 void *isr_priv);
165
166extern void omap_iommu_save_ctx(struct device *dev);
167extern void omap_iommu_restore_ctx(struct device *dev);
168
169extern int omap_install_iommu_arch(const struct iommu_functions *ops);
170extern void omap_uninstall_iommu_arch(const struct iommu_functions *ops);
171
172extern int omap_foreach_iommu_device(void *data,
173 int (*fn)(struct device *, void *));
174
175extern ssize_t
176omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len);
177extern size_t
178omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t len);
179
180#endif /* __MACH_IOMMU_H */
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