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/*
* CAAM Secure Memory/Keywrap API Definitions
* Copyright (c) 2008, 2012 Freescale Semiconductor, Inc.
*/
#ifndef SM_H
#define SM_H
/* Storage access permissions */
#define SM_PERM_READ 0x01
#define SM_PERM_WRITE 0x02
#define SM_PERM_BLOB 0x03
/* Keystore maintenance functions */
void sm_init_keystore(struct device *dev);
u32 sm_detect_keystore_units(struct device *dev);
int sm_establish_keystore(struct device *dev, u32 unit);
void sm_release_keystore(struct device *dev, u32 unit);
/* Keystore accessor functions */
extern int sm_keystore_slot_alloc(struct device *dev, u32 unit, u32 size,
u32 *slot);
extern int sm_keystore_slot_dealloc(struct device *dev, u32 unit, u32 slot);
extern int sm_keystore_slot_load(struct device *dev, u32 unit, u32 slot,
const u8 *key_data, u32 key_length);
extern int sm_keystore_slot_read(struct device *dev, u32 unit, u32 slot,
u32 key_length, u8 *key_data);
extern int sm_keystore_slot_encapsulate(struct device *dev, u32 unit,
u32 inslot, u32 outslot, u16 secretlen,
u8 *keymod, u16 keymodlen);
extern int sm_keystore_slot_decapsulate(struct device *dev, u32 unit,
u32 inslot, u32 outslot, u16 secretlen,
u8 *keymod, u16 keymodlen);
/* Data structure to hold per-slot information */
struct keystore_data_slot_info {
u8 allocated; /* Track slot assignments */
u32 key_length; /* Size of the key */
};
/* Data structure to hold keystore information */
struct keystore_data {
void *base_address; /* Base of the Secure Partition */
u32 slot_count; /* Number of slots in the keystore */
struct keystore_data_slot_info *slot; /* Per-slot information */
};
/* store the detected attributes of a secure memory page */
struct sm_page_descriptor {
u16 phys_pagenum; /* may be discontiguous */
u16 own_part; /* Owning partition */
void *pg_base; /* Calculated virtual address */
struct keystore_data *ksdata;
};
struct caam_drv_private_sm {
struct device *parentdev; /* this ends up as the controller */
struct device *smringdev; /* ring that owns this instance */
spinlock_t kslock ____cacheline_aligned;
/* Default parameters for geometry */
u32 max_pages; /* maximum pages this instance can support */
u32 top_partition; /* highest partition number in this instance */
u32 top_page; /* highest page number in this instance */
u32 page_size; /* page size */
u32 slot_size; /* selected size of each storage block */
/* Partition/Page Allocation Map */
u32 localpages; /* Number of pages we can access */
struct sm_page_descriptor *pagedesc; /* Allocated per-page */
/* Installed handlers for keystore access */
int (*data_init)(struct device *dev, u32 unit);
void (*data_cleanup)(struct device *dev, u32 unit);
int (*slot_alloc)(struct device *dev, u32 unit, u32 size, u32 *slot);
int (*slot_dealloc)(struct device *dev, u32 unit, u32 slot);
void *(*slot_get_address)(struct device *dev, u32 unit, u32 handle);
u32 (*slot_get_base)(struct device *dev, u32 unit, u32 handle);
u32 (*slot_get_offset)(struct device *dev, u32 unit, u32 handle);
u32 (*slot_get_slot_size)(struct device *dev, u32 unit, u32 handle);
};
#endif /* SM_H */
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