2 * omap iommu: main structures
4 * Copyright (C) 2008-2009 Nokia Corporation
6 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
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.
13 #ifndef __MACH_IOMMU_H
14 #define __MACH_IOMMU_H
19 u32 pgsz, prsvd, valid;
23 u32 endian, elsz, mixed;
32 void __iomem *regbase;
36 unsigned int refcount;
37 struct mutex iommu_lock; /* global for this whole object */
40 * We don't change iopgd for a situation like pgd for a task,
41 * but share it globally for each iommu.
44 spinlock_t page_table_lock; /* protect iopgd */
48 struct list_head mmap;
49 struct mutex mmap_lock; /* protect mmap */
51 int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs, void *priv);
53 void *ctx; /* iommu context: registres saved area */
80 /* architecture specific functions */
81 struct iommu_functions {
82 unsigned long version;
84 int (*enable)(struct iommu *obj);
85 void (*disable)(struct iommu *obj);
86 void (*set_twl)(struct iommu *obj, bool on);
87 u32 (*fault_isr)(struct iommu *obj, u32 *ra);
89 void (*tlb_read_cr)(struct iommu *obj, struct cr_regs *cr);
90 void (*tlb_load_cr)(struct iommu *obj, struct cr_regs *cr);
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);
98 u32 (*get_pte_attr)(struct iotlb_entry *e);
100 void (*save_ctx)(struct iommu *obj);
101 void (*restore_ctx)(struct iommu *obj);
102 ssize_t (*dump_ctx)(struct iommu *obj, char *buf, ssize_t len);
105 struct iommu_platform_data {
107 const char *clk_name;
108 const int nr_tlb_entries;
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)
120 #if defined(CONFIG_ARCH_OMAP1)
121 #error "iommu for this processor not implemented yet"
123 #include <plat/iommu2.h>
127 * utilities for super page(16MB, 1MB, 64KB and 4KB)
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)
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)
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)
148 #define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
153 extern u32 iommu_arch_version(void);
155 extern void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
156 extern u32 iotlb_cr_to_virt(struct cr_regs *cr);
158 extern int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e);
159 extern void iommu_set_twl(struct iommu *obj, bool on);
160 extern void flush_iotlb_page(struct iommu *obj, u32 da);
161 extern void flush_iotlb_range(struct iommu *obj, u32 start, u32 end);
162 extern void flush_iotlb_all(struct iommu *obj);
164 extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
165 extern void iopgtable_lookup_entry(struct iommu *obj, u32 da, u32 **ppgd,
167 extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
169 extern int iommu_set_da_range(struct iommu *obj, u32 start, u32 end);
170 extern struct iommu *iommu_get(const char *name);
171 extern void iommu_put(struct iommu *obj);
172 extern int iommu_set_isr(const char *name,
173 int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs,
177 extern void iommu_save_ctx(struct iommu *obj);
178 extern void iommu_restore_ctx(struct iommu *obj);
180 extern int install_iommu_arch(const struct iommu_functions *ops);
181 extern void uninstall_iommu_arch(const struct iommu_functions *ops);
183 extern int foreach_iommu_device(void *data,
184 int (*fn)(struct device *, void *));
186 extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t len);
187 extern size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t len);
189 #endif /* __MACH_IOMMU_H */