diff options
Diffstat (limited to 'drivers/crypto/nx/nx-842.h')
| -rw-r--r-- | drivers/crypto/nx/nx-842.h | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/drivers/crypto/nx/nx-842.h b/drivers/crypto/nx/nx-842.h index ac0ea79d0f8b..c7dd0a4391e0 100644 --- a/drivers/crypto/nx/nx-842.h +++ b/drivers/crypto/nx/nx-842.h @@ -104,6 +104,25 @@ 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; @@ -132,13 +151,4 @@ void nx842_platform_driver_unset(struct nx842_driver *driver); bool nx842_platform_driver_get(void); void nx842_platform_driver_put(void); -size_t nx842_workmem_size(void); - -int nx842_constraints(struct nx842_constraints *constraints); - -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); - #endif /* __NX_842_H__ */ |