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crypto: caam - abstract ahash request double buffering 

caamhash uses double buffering for holding previous/current
and next chunks (data smaller than block size) to be hashed.

Add (inline) functions to abstract this mechanism.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geantă 2017-02-10 14:07:24 +02:00 committed by Herbert Xu
parent 87ec02e740
commit 0355d23d40
1 changed files with 48 additions and 29 deletions
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77
drivers/crypto/caam/caamhash.c
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@ -137,6 +137,31 @@ struct caam_export_state {
int (*finup)(struct ahash_request *req);
};
static inline void switch_buf(struct caam_hash_state *state)
{
state->current_buf ^= 1;
}
static inline u8 *current_buf(struct caam_hash_state *state)
{
return state->current_buf ? state->buf_1 : state->buf_0;
}
static inline u8 *alt_buf(struct caam_hash_state *state)
{
return state->current_buf ? state->buf_0 : state->buf_1;
}
static inline int *current_buflen(struct caam_hash_state *state)
{
return state->current_buf ? &state->buflen_1 : &state->buflen_0;
}
static inline int *alt_buflen(struct caam_hash_state *state)
{
return state->current_buf ? &state->buflen_0 : &state->buflen_1;
}
/* Common job descriptor seq in/out ptr routines */
/* Map state->caam_ctx, and append seq_out_ptr command that points to it */
@ -695,11 +720,10 @@ static int ahash_update_ctx(struct ahash_request *req)
struct device *jrdev = ctx->jrdev;
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
int *buflen = state->current_buf ? &state->buflen_1 : &state->buflen_0;
u8 *next_buf = state->current_buf ? state->buf_0 : state->buf_1;
int *next_buflen = state->current_buf ? &state->buflen_0 :
&state->buflen_1, last_buflen;
u8 *buf = current_buf(state);
int *buflen = current_buflen(state);
u8 *next_buf = alt_buf(state);
int *next_buflen = alt_buflen(state), last_buflen;
int in_len = *buflen + req->nbytes, to_hash;
u32 *desc;
int src_nents, mapped_nents, sec4_sg_bytes, sec4_sg_src_index;
@ -771,7 +795,7 @@ static int ahash_update_ctx(struct ahash_request *req)
cpu_to_caam32(SEC4_SG_LEN_FIN);
}
state->current_buf = !state->current_buf;
switch_buf(state);
desc = edesc->hw_desc;
@ -829,10 +853,9 @@ static int ahash_final_ctx(struct ahash_request *req)
struct device *jrdev = ctx->jrdev;
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
int buflen = state->current_buf ? state->buflen_1 : state->buflen_0;
int last_buflen = state->current_buf ? state->buflen_0 :
state->buflen_1;
u8 *buf = current_buf(state);
int buflen = *current_buflen(state);
int last_buflen = *alt_buflen(state);
u32 *desc;
int sec4_sg_bytes, sec4_sg_src_index;
int digestsize = crypto_ahash_digestsize(ahash);
@ -908,10 +931,9 @@ static int ahash_finup_ctx(struct ahash_request *req)
struct device *jrdev = ctx->jrdev;
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
int buflen = state->current_buf ? state->buflen_1 : state->buflen_0;
int last_buflen = state->current_buf ? state->buflen_0 :
state->buflen_1;
u8 *buf = current_buf(state);
int buflen = *current_buflen(state);
int last_buflen = *alt_buflen(state);
u32 *desc;
int sec4_sg_src_index;
int src_nents, mapped_nents;
@ -1075,8 +1097,8 @@ static int ahash_final_no_ctx(struct ahash_request *req)
struct device *jrdev = ctx->jrdev;
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
int buflen = state->current_buf ? state->buflen_1 : state->buflen_0;
u8 *buf = current_buf(state);
int buflen = *current_buflen(state);
u32 *desc;
int digestsize = crypto_ahash_digestsize(ahash);
struct ahash_edesc *edesc;
@ -1136,11 +1158,10 @@ static int ahash_update_no_ctx(struct ahash_request *req)
struct device *jrdev = ctx->jrdev;
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
int *buflen = state->current_buf ? &state->buflen_1 : &state->buflen_0;
u8 *next_buf = state->current_buf ? state->buf_0 : state->buf_1;
int *next_buflen = state->current_buf ? &state->buflen_0 :
&state->buflen_1;
u8 *buf = current_buf(state);
int *buflen = current_buflen(state);
u8 *next_buf = alt_buf(state);
int *next_buflen = alt_buflen(state);
int in_len = *buflen + req->nbytes, to_hash;
int sec4_sg_bytes, src_nents, mapped_nents;
struct ahash_edesc *edesc;
@ -1200,7 +1221,7 @@ static int ahash_update_no_ctx(struct ahash_request *req)
*next_buflen, 0);
}
state->current_buf = !state->current_buf;
switch_buf(state);
desc = edesc->hw_desc;
@ -1263,10 +1284,9 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
struct device *jrdev = ctx->jrdev;
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
int buflen = state->current_buf ? state->buflen_1 : state->buflen_0;
int last_buflen = state->current_buf ? state->buflen_0 :
state->buflen_1;
u8 *buf = current_buf(state);
int buflen = *current_buflen(state);
int last_buflen = *alt_buflen(state);
u32 *desc;
int sec4_sg_bytes, sec4_sg_src_index, src_nents, mapped_nents;
int digestsize = crypto_ahash_digestsize(ahash);
@ -1356,9 +1376,8 @@ static int ahash_update_first(struct ahash_request *req)
struct device *jrdev = ctx->jrdev;
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
u8 *next_buf = state->current_buf ? state->buf_1 : state->buf_0;
int *next_buflen = state->current_buf ?
&state->buflen_1 : &state->buflen_0;
u8 *next_buf = current_buf(state);
int *next_buflen = current_buflen(state);
int to_hash;
u32 *desc;
int src_nents, mapped_nents;