169 lines
4.1 KiB
C
169 lines
4.1 KiB
C
/*
|
|
* omap iommu: main structures
|
|
*
|
|
* Copyright (C) 2008-2009 Nokia Corporation
|
|
*
|
|
* Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef __MACH_IOMMU_H
|
|
#define __MACH_IOMMU_H
|
|
|
|
struct iotlb_entry {
|
|
u32 da;
|
|
u32 pa;
|
|
u32 pgsz, prsvd, valid;
|
|
union {
|
|
u16 ap;
|
|
struct {
|
|
u32 endian, elsz, mixed;
|
|
};
|
|
};
|
|
};
|
|
|
|
struct iommu {
|
|
const char *name;
|
|
struct module *owner;
|
|
struct clk *clk;
|
|
void __iomem *regbase;
|
|
struct device *dev;
|
|
|
|
unsigned int refcount;
|
|
struct mutex iommu_lock; /* global for this whole object */
|
|
|
|
/*
|
|
* We don't change iopgd for a situation like pgd for a task,
|
|
* but share it globally for each iommu.
|
|
*/
|
|
u32 *iopgd;
|
|
spinlock_t page_table_lock; /* protect iopgd */
|
|
|
|
int nr_tlb_entries;
|
|
|
|
struct list_head mmap;
|
|
struct mutex mmap_lock; /* protect mmap */
|
|
|
|
int (*isr)(struct iommu *obj);
|
|
|
|
void *ctx; /* iommu context: registres saved area */
|
|
};
|
|
|
|
struct cr_regs {
|
|
union {
|
|
struct {
|
|
u16 cam_l;
|
|
u16 cam_h;
|
|
};
|
|
u32 cam;
|
|
};
|
|
union {
|
|
struct {
|
|
u16 ram_l;
|
|
u16 ram_h;
|
|
};
|
|
u32 ram;
|
|
};
|
|
};
|
|
|
|
struct iotlb_lock {
|
|
short base;
|
|
short vict;
|
|
};
|
|
|
|
/* architecture specific functions */
|
|
struct iommu_functions {
|
|
unsigned long version;
|
|
|
|
int (*enable)(struct iommu *obj);
|
|
void (*disable)(struct iommu *obj);
|
|
u32 (*fault_isr)(struct iommu *obj, u32 *ra);
|
|
|
|
void (*tlb_read_cr)(struct iommu *obj, struct cr_regs *cr);
|
|
void (*tlb_load_cr)(struct iommu *obj, struct cr_regs *cr);
|
|
|
|
struct cr_regs *(*alloc_cr)(struct iommu *obj, struct iotlb_entry *e);
|
|
int (*cr_valid)(struct cr_regs *cr);
|
|
u32 (*cr_to_virt)(struct cr_regs *cr);
|
|
void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
|
|
ssize_t (*dump_cr)(struct iommu *obj, struct cr_regs *cr, char *buf);
|
|
|
|
u32 (*get_pte_attr)(struct iotlb_entry *e);
|
|
|
|
void (*save_ctx)(struct iommu *obj);
|
|
void (*restore_ctx)(struct iommu *obj);
|
|
ssize_t (*dump_ctx)(struct iommu *obj, char *buf, ssize_t len);
|
|
};
|
|
|
|
struct iommu_platform_data {
|
|
const char *name;
|
|
const char *clk_name;
|
|
const int nr_tlb_entries;
|
|
};
|
|
|
|
#if defined(CONFIG_ARCH_OMAP1)
|
|
#error "iommu for this processor not implemented yet"
|
|
#else
|
|
#include <mach/iommu2.h>
|
|
#endif
|
|
|
|
/*
|
|
* utilities for super page(16MB, 1MB, 64KB and 4KB)
|
|
*/
|
|
|
|
#define iopgsz_max(bytes) \
|
|
(((bytes) >= SZ_16M) ? SZ_16M : \
|
|
((bytes) >= SZ_1M) ? SZ_1M : \
|
|
((bytes) >= SZ_64K) ? SZ_64K : \
|
|
((bytes) >= SZ_4K) ? SZ_4K : 0)
|
|
|
|
#define bytes_to_iopgsz(bytes) \
|
|
(((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M : \
|
|
((bytes) == SZ_1M) ? MMU_CAM_PGSZ_1M : \
|
|
((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K : \
|
|
((bytes) == SZ_4K) ? MMU_CAM_PGSZ_4K : -1)
|
|
|
|
#define iopgsz_to_bytes(iopgsz) \
|
|
(((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M : \
|
|
((iopgsz) == MMU_CAM_PGSZ_1M) ? SZ_1M : \
|
|
((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K : \
|
|
((iopgsz) == MMU_CAM_PGSZ_4K) ? SZ_4K : 0)
|
|
|
|
#define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
|
|
|
|
/*
|
|
* global functions
|
|
*/
|
|
extern u32 iommu_arch_version(void);
|
|
|
|
extern void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
|
|
extern u32 iotlb_cr_to_virt(struct cr_regs *cr);
|
|
|
|
extern int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e);
|
|
extern void flush_iotlb_page(struct iommu *obj, u32 da);
|
|
extern void flush_iotlb_range(struct iommu *obj, u32 start, u32 end);
|
|
extern void flush_iotlb_all(struct iommu *obj);
|
|
|
|
extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
|
|
extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
|
|
|
|
extern struct iommu *iommu_get(const char *name);
|
|
extern void iommu_put(struct iommu *obj);
|
|
|
|
extern void iommu_save_ctx(struct iommu *obj);
|
|
extern void iommu_restore_ctx(struct iommu *obj);
|
|
|
|
extern int install_iommu_arch(const struct iommu_functions *ops);
|
|
extern void uninstall_iommu_arch(const struct iommu_functions *ops);
|
|
|
|
extern int foreach_iommu_device(void *data,
|
|
int (*fn)(struct device *, void *));
|
|
|
|
extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t len);
|
|
extern size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t len);
|
|
|
|
#endif /* __MACH_IOMMU_H */
|