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