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crypto: acomp - add driver-side scomp interface

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Add a synchronous back-end (scomp) to acomp. This allows to easily
expose the already present compression algorithms in LKCF via acomp.

Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Giovanni Cabiddu
2016-10-21 13:19:48 +01:00
committed by Herbert Xu
parent 2ebda74fd6
commit 1ab53a77b7
7 changed files with 578 additions and 29 deletions
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42
include/crypto/acompress.h
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@@ -42,9 +42,18 @@ struct acomp_req {
* struct crypto_acomp - user-instantiated objects which encapsulate
* algorithms and core processing logic
*
* @base: Common crypto API algorithm data structure
* @compress: Function performs a compress operation
* @decompress: Function performs a de-compress operation
* @dst_free: Frees destination buffer if allocated inside the
* algorithm
* @reqsize: Context size for (de)compression requests
* @base: Common crypto API algorithm data structure
*/
struct crypto_acomp {
int (*compress)(struct acomp_req *req);
int (*decompress)(struct acomp_req *req);
void (*dst_free)(struct scatterlist *dst);
unsigned int reqsize;
struct crypto_tfm base;
};
@@ -125,7 +134,7 @@ static inline struct acomp_alg *crypto_acomp_alg(struct crypto_acomp *tfm)
static inline unsigned int crypto_acomp_reqsize(struct crypto_acomp *tfm)
{
return crypto_acomp_alg(tfm)->reqsize;
return tfm->reqsize;
}
static inline void acomp_request_set_tfm(struct acomp_req *req,
@@ -165,16 +174,7 @@ static inline int crypto_has_acomp(const char *alg_name, u32 type, u32 mask)
*
* Return: allocated handle in case of success or NULL in case of an error
*/
static inline struct acomp_req *acomp_request_alloc(struct crypto_acomp *tfm)
{
struct acomp_req *req;
req = kzalloc(sizeof(*req) + crypto_acomp_reqsize(tfm), GFP_KERNEL);
if (likely(req))
acomp_request_set_tfm(req, tfm);
return req;
}
struct acomp_req *acomp_request_alloc(struct crypto_acomp *tfm);
/**
* acomp_request_free() -- zeroize and free asynchronous (de)compression
@@ -183,17 +183,7 @@ static inline struct acomp_req *acomp_request_alloc(struct crypto_acomp *tfm)
*
* @req: request to free
*/
static inline void acomp_request_free(struct acomp_req *req)
{
struct crypto_acomp *tfm = crypto_acomp_reqtfm(req);
struct acomp_alg *alg = crypto_acomp_alg(tfm);
if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
alg->dst_free(req->dst);
req->dst = NULL;
}
kzfree(req);
}
void acomp_request_free(struct acomp_req *req);
/**
* acomp_request_set_callback() -- Sets an asynchronous callback
@@ -256,9 +246,8 @@ static inline void acomp_request_set_params(struct acomp_req *req,
static inline int crypto_acomp_compress(struct acomp_req *req)
{
struct crypto_acomp *tfm = crypto_acomp_reqtfm(req);
struct acomp_alg *alg = crypto_acomp_alg(tfm);
return alg->compress(req);
return tfm->compress(req);
}
/**
@@ -273,9 +262,8 @@ static inline int crypto_acomp_compress(struct acomp_req *req)
static inline int crypto_acomp_decompress(struct acomp_req *req)
{
struct crypto_acomp *tfm = crypto_acomp_reqtfm(req);
struct acomp_alg *alg = crypto_acomp_alg(tfm);
return alg->decompress(req);
return tfm->decompress(req);
}
#endif