diff options
Diffstat (limited to 'drivers/crypto/nx/nx-842.h')
| -rw-r--r-- | drivers/crypto/nx/nx-842.h | 65 |
1 files changed, 53 insertions, 12 deletions
diff --git a/drivers/crypto/nx/nx-842.h b/drivers/crypto/nx/nx-842.h index ac0ea79d0..a4eee3bba 100644 --- a/drivers/crypto/nx/nx-842.h +++ b/drivers/crypto/nx/nx-842.h @@ -3,8 +3,9 @@ #define __NX_842_H__ #include <linux/kernel.h> +#include <linux/init.h> #include <linux/module.h> -#include <linux/sw842.h> +#include <linux/crypto.h> #include <linux/of.h> #include <linux/slab.h> #include <linux/io.h> @@ -104,6 +105,25 @@ static inline unsigned long nx842_get_pa(void *addr) #define GET_FIELD(v, m) (((v) & (m)) >> MASK_LSH(m)) #define SET_FIELD(v, m, val) (((v) & ~(m)) | (((val) << MASK_LSH(m)) & (m))) +/** + * This provides the driver's constraints. Different nx842 implementations + * may have varying requirements. The constraints are: + * @alignment: All buffers should be aligned to this + * @multiple: All buffer lengths should be a multiple of this + * @minimum: Buffer lengths must not be less than this amount + * @maximum: Buffer lengths must not be more than this amount + * + * The constraints apply to all buffers and lengths, both input and output, + * for both compression and decompression, except for the minimum which + * only applies to compression input and decompression output; the + * compressed data can be less than the minimum constraint. It can be + * assumed that compressed data will always adhere to the multiple + * constraint. + * + * The driver may succeed even if these constraints are violated; + * however the driver can return failure or suffer reduced performance + * if any constraint is not met. + */ struct nx842_constraints { int alignment; int multiple; @@ -126,19 +146,40 @@ struct nx842_driver { void *wrkmem); }; -struct nx842_driver *nx842_platform_driver(void); -bool nx842_platform_driver_set(struct nx842_driver *driver); -void nx842_platform_driver_unset(struct nx842_driver *driver); -bool nx842_platform_driver_get(void); -void nx842_platform_driver_put(void); +struct nx842_crypto_header_group { + __be16 padding; /* unused bytes at start of group */ + __be32 compressed_length; /* compressed bytes in group */ + __be32 uncompressed_length; /* bytes after decompression */ +} __packed; + +struct nx842_crypto_header { + __be16 magic; /* NX842_CRYPTO_MAGIC */ + __be16 ignore; /* decompressed end bytes to ignore */ + u8 groups; /* total groups in this header */ + struct nx842_crypto_header_group group[]; +} __packed; -size_t nx842_workmem_size(void); +#define NX842_CRYPTO_GROUP_MAX (0x20) -int nx842_constraints(struct nx842_constraints *constraints); +struct nx842_crypto_ctx { + spinlock_t lock; + + u8 *wmem; + u8 *sbounce, *dbounce; + + struct nx842_crypto_header header; + struct nx842_crypto_header_group group[NX842_CRYPTO_GROUP_MAX]; + + struct nx842_driver *driver; +}; -int nx842_compress(const unsigned char *in, unsigned int in_len, - unsigned char *out, unsigned int *out_len, void *wrkmem); -int nx842_decompress(const unsigned char *in, unsigned int in_len, - unsigned char *out, unsigned int *out_len, void *wrkmem); +int nx842_crypto_init(struct crypto_tfm *tfm, struct nx842_driver *driver); +void nx842_crypto_exit(struct crypto_tfm *tfm); +int nx842_crypto_compress(struct crypto_tfm *tfm, + const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen); +int nx842_crypto_decompress(struct crypto_tfm *tfm, + const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen); #endif /* __NX_842_H__ */ |