linux-kernel - Re: [PATCH RFC 4/4] crypto: stm32: convert to the new crypto engine API

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Date:   Wed, 6 Dec 2017 11:03:23 +0000
From:   Fabien DESSENNE <fabien.dessenne@...com>
To:     Corentin Labbe <clabbe.montjoie@...il.com>,
        "herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        "arei.gonglei@...wei.com" <arei.gonglei@...wei.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "mcoquelin.stm32@...il.com" <mcoquelin.stm32@...il.com>,
        "mst@...hat.com" <mst@...hat.com>,
        Lionel DEBIEVE <lionel.debieve@...com>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH RFC 4/4] crypto: stm32: convert to the new crypto engine
 API

Hi,


On 29/11/17 09:41, Corentin Labbe wrote:
> This patch convert the driver to the new crypto engine API.
>
> Signed-off-by: Corentin Labbe <clabbe.montjoie@...il.com>

Tested-by: Fabien Dessenne <fabien.dessenne@...com>

> ---
>   drivers/crypto/stm32/stm32-hash.c | 22 +++++++++++++++-------
>   1 file changed, 15 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
> index 4ca4a264a833..e3f9f7b04ce2 100644
> --- a/drivers/crypto/stm32/stm32-hash.c
> +++ b/drivers/crypto/stm32/stm32-hash.c
> @@ -122,6 +122,7 @@ enum stm32_hash_data_format {
>   #define HASH_DMA_THRESHOLD		50
>   
>   struct stm32_hash_ctx {
> +	struct crypto_engine_reqctx enginectx;
>   	struct stm32_hash_dev	*hdev;
>   	unsigned long		flags;
>   
> @@ -811,7 +812,7 @@ static void stm32_hash_finish_req(struct ahash_request *req, int err)
>   		rctx->flags |= HASH_FLAGS_ERRORS;
>   	}
>   
> -	crypto_finalize_hash_request(hdev->engine, req, err);
> +	crypto_finalize_request(hdev->engine, &req->base, err);
>   }
>   
>   static int stm32_hash_hw_init(struct stm32_hash_dev *hdev,
> @@ -828,15 +829,21 @@ static int stm32_hash_hw_init(struct stm32_hash_dev *hdev,
>   	return 0;
>   }
>   
> +static int stm32_hash_one_request(struct crypto_engine *engine,
> +				  struct crypto_async_request *areq);
> +static int stm32_hash_prepare_req(struct crypto_engine *engine,
> +				  struct crypto_async_request *areq);
> +
>   static int stm32_hash_handle_queue(struct stm32_hash_dev *hdev,
>   				   struct ahash_request *req)
>   {
> -	return crypto_transfer_hash_request_to_engine(hdev->engine, req);
> +	return crypto_transfer_request_to_engine(hdev->engine, &req->base);
>   }
>   
>   static int stm32_hash_prepare_req(struct crypto_engine *engine,
> -				  struct ahash_request *req)
> +				  struct crypto_async_request *areq)
>   {
> +	struct ahash_request *req = ahash_request_cast(areq);
>   	struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
>   	struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
>   	struct stm32_hash_request_ctx *rctx;
> @@ -855,8 +862,9 @@ static int stm32_hash_prepare_req(struct crypto_engine *engine,
>   }
>   
>   static int stm32_hash_one_request(struct crypto_engine *engine,
> -				  struct ahash_request *req)
> +				  struct crypto_async_request *areq)
>   {
> +	struct ahash_request *req = ahash_request_cast(areq);
>   	struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
>   	struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
>   	struct stm32_hash_request_ctx *rctx;
> @@ -1033,6 +1041,9 @@ static int stm32_hash_cra_init_algs(struct crypto_tfm *tfm,
>   	if (algs_hmac_name)
>   		ctx->flags |= HASH_FLAGS_HMAC;
>   
> +	ctx->enginectx.op.do_one_request = stm32_hash_one_request;
> +	ctx->enginectx.op.prepare_request = stm32_hash_prepare_req;
> +	ctx->enginectx.op.unprepare_request = NULL;
>   	return 0;
>   }
>   
> @@ -1493,9 +1504,6 @@ static int stm32_hash_probe(struct platform_device *pdev)
>   		goto err_engine;
>   	}
>   
> -	hdev->engine->prepare_hash_request = stm32_hash_prepare_req;
> -	hdev->engine->hash_one_request = stm32_hash_one_request;
> -
>   	ret = crypto_engine_start(hdev->engine);
>   	if (ret)
>   		goto err_engine_start;