Re: [PATCH] crypto: caam - enable crypto-engine retry mechanism

From: Horia Geantă
Date: Mon Oct 26 2020 - 11:36:42 EST


On 10/21/2020 11:07 PM, Iuliana Prodan wrote:
> Use the new crypto_engine_alloc_init_and_set() function to
> initialize crypto-engine and enable retry mechanism.
>
> Set the maximum size for crypto-engine software queue based on
> Job Ring size (JOBR_DEPTH) and a threshold (reserved for the
> non-crypto-API requests that are not pass through crypto-engine).
^ passed

>
> The callback for do_batch_requests is NULL, since CAAM
> doesn't support linked requests.
>
> Signed-off-by: Iuliana Prodan <iuliana.prodan@xxxxxxx>
> ---
> drivers/crypto/caam/intern.h | 3 +++
> drivers/crypto/caam/jr.c | 6 +++++-
> 2 files changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
> index 9112279..44fe6ee 100644
> --- a/drivers/crypto/caam/intern.h
> +++ b/drivers/crypto/caam/intern.h
> @@ -16,6 +16,9 @@
> /* Currently comes from Kconfig param as a ^2 (driver-required) */
> #define JOBR_DEPTH (1 << CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE)
>
> +#define THRESHOLD 15
Unless there's a comment added for THRESHOLD (e.g. what's in the
commit message), I don't think the define is helpful.

> +#define CRYPTO_ENGINE_MAX_QLEN (2 * (JOBR_DEPTH - THRESHOLD))
> +
What's the logic behind multiplying by 2?

> /* Kconfig params for interrupt coalescing if selected (else zero) */
> #ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_INTC
> #define JOBR_INTC JRCFG_ICEN
> diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c
> index 6f66996..88540c9 100644
> --- a/drivers/crypto/caam/jr.c
> +++ b/drivers/crypto/caam/jr.c
> @@ -550,7 +550,11 @@ static int caam_jr_probe(struct platform_device *pdev)
> }
>
> /* Initialize crypto engine */
> - jrpriv->engine = crypto_engine_alloc_init(jrdev, false);
> + jrpriv->engine = crypto_engine_alloc_init_and_set(jrdev,
> + true,
> + NULL,
> + false,
> + CRYPTO_ENGINE_MAX_QLEN);
Let's make the argument list more compact.

Horia