Re: [PATCH v2 07/10] crypto: marvell: Move SRAM I/O operations to step functions

[Boris Brezillon <boris.brezillon@free-electrons.com>]

On Fri, 17 Jun 2016 13:24:06 +0200
Romain Perier <romain.perier@free-electrons.com> wrote:

> Currently the crypto requests were sent to engines sequentially.
> This commit moves the SRAM I/O operations from the prepare to the step
> functions. It provides flexibility for future works and allow to prepare
> a request while the engine is running.
> 
> Signed-off-by: Romain Perier <romain.perier@free-electrons.com>

Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>

> ---
>  drivers/crypto/marvell/cipher.c |  6 +++---
>  drivers/crypto/marvell/hash.c   | 18 +++++++++---------
>  2 files changed, 12 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/crypto/marvell/cipher.c b/drivers/crypto/marvell/cipher.c
> index 175ce76..79d4175 100644
> --- a/drivers/crypto/marvell/cipher.c
> +++ b/drivers/crypto/marvell/cipher.c
> @@ -89,6 +89,9 @@ static void mv_cesa_ablkcipher_std_step(struct ablkcipher_request *req)
>  	size_t  len = min_t(size_t, req->nbytes - sreq->offset,
>  			    CESA_SA_SRAM_PAYLOAD_SIZE);
>  
> +	mv_cesa_adjust_op(engine, &sreq->op);
> +	memcpy_toio(engine->sram, &sreq->op, sizeof(sreq->op));
> +
>  	len = sg_pcopy_to_buffer(req->src, creq->src_nents,
>  				 engine->sram + CESA_SA_DATA_SRAM_OFFSET,
>  				 len, sreq->offset);
> @@ -177,12 +180,9 @@ mv_cesa_ablkcipher_std_prepare(struct ablkcipher_request *req)
>  {
>  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
>  	struct mv_cesa_ablkcipher_std_req *sreq = &creq->std;
> -	struct mv_cesa_engine *engine = creq->base.engine;
>  
>  	sreq->size = 0;
>  	sreq->offset = 0;
> -	mv_cesa_adjust_op(engine, &sreq->op);
> -	memcpy_toio(engine->sram, &sreq->op, sizeof(sreq->op));
>  }
>  
>  static inline void mv_cesa_ablkcipher_prepare(struct crypto_async_request *req,
> diff --git a/drivers/crypto/marvell/hash.c b/drivers/crypto/marvell/hash.c
> index 09665a7..e1f8acd 100644
> --- a/drivers/crypto/marvell/hash.c
> +++ b/drivers/crypto/marvell/hash.c
> @@ -162,6 +162,15 @@ static void mv_cesa_ahash_std_step(struct ahash_request *req)
>  	unsigned int new_cache_ptr = 0;
>  	u32 frag_mode;
>  	size_t  len;
> +	unsigned int digsize;
> +	int i;
> +
> +	mv_cesa_adjust_op(engine, &creq->op_tmpl);
> +	memcpy_toio(engine->sram, &creq->op_tmpl, sizeof(creq->op_tmpl));
> +
> +	digsize = crypto_ahash_digestsize(crypto_ahash_reqtfm(req));
> +	for (i = 0; i < digsize / 4; i++)
> +		writel_relaxed(creq->state[i], engine->regs + CESA_IVDIG(i));
>  
>  	if (creq->cache_ptr)
>  		memcpy_toio(engine->sram + CESA_SA_DATA_SRAM_OFFSET,
> @@ -265,11 +274,8 @@ static void mv_cesa_ahash_std_prepare(struct ahash_request *req)
>  {
>  	struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
>  	struct mv_cesa_ahash_std_req *sreq = &creq->req.std;
> -	struct mv_cesa_engine *engine = creq->base.engine;
>  
>  	sreq->offset = 0;
> -	mv_cesa_adjust_op(engine, &creq->op_tmpl);
> -	memcpy_toio(engine->sram, &creq->op_tmpl, sizeof(creq->op_tmpl));
>  }
>  
>  static void mv_cesa_ahash_step(struct crypto_async_request *req)
> @@ -336,8 +342,6 @@ static void mv_cesa_ahash_prepare(struct crypto_async_request *req,
>  {
>  	struct ahash_request *ahashreq = ahash_request_cast(req);
>  	struct mv_cesa_ahash_req *creq = ahash_request_ctx(ahashreq);
> -	unsigned int digsize;
> -	int i;
>  
>  	creq->base.engine = engine;
>  
> @@ -345,10 +349,6 @@ static void mv_cesa_ahash_prepare(struct crypto_async_request *req,
>  		mv_cesa_ahash_dma_prepare(ahashreq);
>  	else
>  		mv_cesa_ahash_std_prepare(ahashreq);
> -
> -	digsize = crypto_ahash_digestsize(crypto_ahash_reqtfm(ahashreq));
> -	for (i = 0; i < digsize / 4; i++)
> -		writel_relaxed(creq->state[i], engine->regs + CESA_IVDIG(i));
>  }
>  
>  static void mv_cesa_ahash_req_cleanup(struct crypto_async_request *req)