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- /*
- * 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 omap_iommu {
- const char *name;
- struct module *owner;
- struct clk *clk;
- void __iomem *regbase;
- struct device *dev;
- void *isr_priv;
- struct iommu_domain *domain;
- unsigned int refcount;
- spinlock_t 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 */
- void *ctx; /* iommu context: registres saved area */
- u32 da_start;
- u32 da_end;
- };
- 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 omap_iommu *obj);
- void (*disable)(struct omap_iommu *obj);
- void (*set_twl)(struct omap_iommu *obj, bool on);
- u32 (*fault_isr)(struct omap_iommu *obj, u32 *ra);
- void (*tlb_read_cr)(struct omap_iommu *obj, struct cr_regs *cr);
- void (*tlb_load_cr)(struct omap_iommu *obj, struct cr_regs *cr);
- struct cr_regs *(*alloc_cr)(struct omap_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 omap_iommu *obj, struct cr_regs *cr,
- char *buf);
- u32 (*get_pte_attr)(struct iotlb_entry *e);
- void (*save_ctx)(struct omap_iommu *obj);
- void (*restore_ctx)(struct omap_iommu *obj);
- ssize_t (*dump_ctx)(struct omap_iommu *obj, char *buf, ssize_t len);
- };
- struct iommu_platform_data {
- const char *name;
- const char *clk_name;
- const int nr_tlb_entries;
- u32 da_start;
- u32 da_end;
- };
- /**
- * struct iommu_arch_data - omap iommu private data
- * @name: name of the iommu device
- * @iommu_dev: handle of the iommu device
- *
- * This is an omap iommu private data object, which binds an iommu user
- * to its iommu device. This object should be placed at the iommu user's
- * dev_archdata so generic IOMMU API can be used without having to
- * utilize omap-specific plumbing anymore.
- */
- struct omap_iommu_arch_data {
- const char *name;
- struct omap_iommu *iommu_dev;
- };
- /**
- * dev_to_omap_iommu() - retrieves an omap iommu object from a user device
- * @dev: iommu client device
- */
- static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev)
- {
- struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
- return arch_data->iommu_dev;
- }
- /* IOMMU errors */
- #define OMAP_IOMMU_ERR_TLB_MISS (1 << 0)
- #define OMAP_IOMMU_ERR_TRANS_FAULT (1 << 1)
- #define OMAP_IOMMU_ERR_EMU_MISS (1 << 2)
- #define OMAP_IOMMU_ERR_TBLWALK_FAULT (1 << 3)
- #define OMAP_IOMMU_ERR_MULTIHIT_FAULT (1 << 4)
- #if defined(CONFIG_ARCH_OMAP1)
- #error "iommu for this processor not implemented yet"
- #else
- #include <plat/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 omap_iommu_arch_version(void);
- extern void omap_iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
- extern int
- omap_iopgtable_store_entry(struct omap_iommu *obj, struct iotlb_entry *e);
- extern int omap_iommu_set_isr(const char *name,
- int (*isr)(struct omap_iommu *obj, u32 da, u32 iommu_errs,
- void *priv),
- void *isr_priv);
- extern void omap_iommu_save_ctx(struct device *dev);
- extern void omap_iommu_restore_ctx(struct device *dev);
- extern int omap_install_iommu_arch(const struct iommu_functions *ops);
- extern void omap_uninstall_iommu_arch(const struct iommu_functions *ops);
- extern int omap_foreach_iommu_device(void *data,
- int (*fn)(struct device *, void *));
- extern ssize_t
- omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len);
- extern size_t
- omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t len);
- #endif /* __MACH_IOMMU_H */
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