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omap: iommu: migrate to the generic IOMMU API
[deliverable/linux.git] / arch / arm / plat-omap / include / plat / iommu.h
CommitLineData
a9dcad5e
HD		 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;
d594f1f3 34 void *isr_priv;
a9dcad5e
HD		 35
36 unsigned int refcount;
f626b52d 37 spinlock_t iommu_lock; /* global for this whole object */
a9dcad5e
HD		 38
39 /*
40 * We don't change iopgd for a situation like pgd for a task,
41 * but share it globally for each iommu.
42 */
43 u32 *iopgd;
44 spinlock_t page_table_lock; /* protect iopgd */
45
46 int nr_tlb_entries;
47
48 struct list_head mmap;
49 struct mutex mmap_lock; /* protect mmap */
50
d594f1f3 51 int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs, void *priv);
a9dcad5e
HD		 52
53 void *ctx; /* iommu context: registres saved area */
c7f4ab26
GLF		 54 u32 da_start;
55 u32 da_end;
a9dcad5e
HD		 56};
57
58struct cr_regs {
59 union {
60 struct {
61 u16 cam_l;
62 u16 cam_h;
63 };
64 u32 cam;
65 };
66 union {
67 struct {
68 u16 ram_l;
69 u16 ram_h;
70 };
71 u32 ram;
72 };
73};
74
75struct iotlb_lock {
76 short base;
77 short vict;
78};
79
80/* architecture specific functions */
81struct iommu_functions {
82 unsigned long version;
83
84 int (*enable)(struct iommu *obj);
85 void (*disable)(struct iommu *obj);
ddfa975a 86 void (*set_twl)(struct iommu *obj, bool on);
a9dcad5e
HD		 87 u32 (*fault_isr)(struct iommu *obj, u32 *ra);
88
89 void (*tlb_read_cr)(struct iommu *obj, struct cr_regs *cr);
90 void (*tlb_load_cr)(struct iommu *obj, struct cr_regs *cr);
91
92 struct cr_regs *(*alloc_cr)(struct iommu *obj, 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 iommu *obj, struct cr_regs *cr, char *buf);
97
98 u32 (*get_pte_attr)(struct iotlb_entry *e);
99
100 void (*save_ctx)(struct iommu *obj);
101 void (*restore_ctx)(struct iommu *obj);
14e0e679 102 ssize_t (*dump_ctx)(struct iommu *obj, char *buf, ssize_t len);
a9dcad5e
HD		 103};
104
105struct iommu_platform_data {
106 const char *name;
107 const char *clk_name;
108 const int nr_tlb_entries;
c7f4ab26
GLF		 109 u32 da_start;
110 u32 da_end;
a9dcad5e
HD		 111};
112
d594f1f3
DC		 113/* IOMMU errors */
114#define OMAP_IOMMU_ERR_TLB_MISS (1 << 0)
115#define OMAP_IOMMU_ERR_TRANS_FAULT (1 << 1)
116#define OMAP_IOMMU_ERR_EMU_MISS (1 << 2)
117#define OMAP_IOMMU_ERR_TBLWALK_FAULT (1 << 3)
118#define OMAP_IOMMU_ERR_MULTIHIT_FAULT (1 << 4)
119
a9dcad5e
HD		 120#if defined(CONFIG_ARCH_OMAP1)
121#error "iommu for this processor not implemented yet"
122#else
ce491cf8 123#include <plat/iommu2.h>
a9dcad5e
HD		 124#endif
125
126/*
127 * utilities for super page(16MB, 1MB, 64KB and 4KB)
128 */
129
130#define iopgsz_max(bytes) \
131 (((bytes) >= SZ_16M) ? SZ_16M : \
132 ((bytes) >= SZ_1M) ? SZ_1M : \
133 ((bytes) >= SZ_64K) ? SZ_64K : \
134 ((bytes) >= SZ_4K) ? SZ_4K : 0)
135
136#define bytes_to_iopgsz(bytes) \
137 (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M : \
138 ((bytes) == SZ_1M) ? MMU_CAM_PGSZ_1M : \
139 ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K : \
140 ((bytes) == SZ_4K) ? MMU_CAM_PGSZ_4K : -1)
141
142#define iopgsz_to_bytes(iopgsz) \
143 (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M : \
144 ((iopgsz) == MMU_CAM_PGSZ_1M) ? SZ_1M : \
145 ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K : \
146 ((iopgsz) == MMU_CAM_PGSZ_4K) ? SZ_4K : 0)
147
148#define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
149
150/*
151 * global functions
152 */
153extern u32 iommu_arch_version(void);
154
155extern void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
156extern u32 iotlb_cr_to_virt(struct cr_regs *cr);
157
158extern int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e);
ddfa975a 159extern void iommu_set_twl(struct iommu *obj, bool on);
a9dcad5e
HD		 160extern void flush_iotlb_page(struct iommu *obj, u32 da);
161extern void flush_iotlb_range(struct iommu *obj, u32 start, u32 end);
162extern void flush_iotlb_all(struct iommu *obj);
163
164extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
4f85f99b
DC		 165extern void iopgtable_lookup_entry(struct iommu *obj, u32 da, u32 **ppgd,
166 u32 **ppte);
a9dcad5e
HD		 167extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
168
c7f4ab26 169extern int iommu_set_da_range(struct iommu *obj, u32 start, u32 end);
d594f1f3
DC		 170extern int iommu_set_isr(const char *name,
171 int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs,
172 void *priv),
173 void *isr_priv);
a9dcad5e
HD		 174
175extern void iommu_save_ctx(struct iommu *obj);
176extern void iommu_restore_ctx(struct iommu *obj);
177
178extern int install_iommu_arch(const struct iommu_functions *ops);
179extern void uninstall_iommu_arch(const struct iommu_functions *ops);
180
181extern int foreach_iommu_device(void *data,
182 int (*fn)(struct device *, void *));
183
14e0e679
HD		 184extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t len);
185extern size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t len);
f626b52d 186struct device *omap_find_iommu_device(const char *name);
a9dcad5e
HD		 187
188#endif /* __MACH_IOMMU_H */
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