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Date:   Mon, 14 Jun 2021 13:35:32 +1000
From:   Nicholas Piggin <npiggin@gmail.com>
Subject: Re: [PATCH v5 15/17] crypto/nx: Register and unregister VAS interface
 on PowerVM
To:     Haren Myneni <haren@linux.ibm.com>, herbert@gondor.apana.org.au,
        linux-crypto@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        mpe@ellerman.id.au
Cc:     haren@us.ibm.com, hbabu@us.ibm.com
References: <ed7a09822cf3a2e463f942e5a37309a2365c9d79.camel@linux.ibm.com>
        <0fe93c925b9e5517f55121f51074de425feb5236.camel@linux.ibm.com>
In-Reply-To: <0fe93c925b9e5517f55121f51074de425feb5236.camel@linux.ibm.com>
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Excerpts from Haren Myneni's message of June 13, 2021 9:04 pm:
>=20
> The user space uses /dev/crypto/nx-gzip interface to setup VAS
> windows, create paste mapping and close windows. This patch adds
> changes to create/remove this interface with VAS register/unregister
> functions on PowerVM platform.
>=20
> Signed-off-by: Haren Myneni <haren@linux.ibm.com>
> Acked-by: Herbert Xu <herbert@gondor.apana.org.au>

Acked-by: Nicholas Piggin <npiggin@gmail.com>

> ---
>  drivers/crypto/nx/Kconfig             | 1 +
>  drivers/crypto/nx/nx-common-pseries.c | 9 +++++++++
>  2 files changed, 10 insertions(+)
>=20
> diff --git a/drivers/crypto/nx/Kconfig b/drivers/crypto/nx/Kconfig
> index 23e3d0160e67..2a35e0e785bd 100644
> --- a/drivers/crypto/nx/Kconfig
> +++ b/drivers/crypto/nx/Kconfig
> @@ -29,6 +29,7 @@ if CRYPTO_DEV_NX_COMPRESS
>  config CRYPTO_DEV_NX_COMPRESS_PSERIES
>  	tristate "Compression acceleration support on pSeries platform"
>  	depends on PPC_PSERIES && IBMVIO
> +	depends on PPC_VAS
>  	default y
>  	help
>  	  Support for PowerPC Nest (NX) compression acceleration. This
> diff --git a/drivers/crypto/nx/nx-common-pseries.c b/drivers/crypto/nx/nx=
-common-pseries.c
> index cc8dd3072b8b..9a40fca8a9e6 100644
> --- a/drivers/crypto/nx/nx-common-pseries.c
> +++ b/drivers/crypto/nx/nx-common-pseries.c
> @@ -9,6 +9,7 @@
>   */
> =20
>  #include <asm/vio.h>
> +#include <asm/vas.h>
> =20
>  #include "nx-842.h"
>  #include "nx_csbcpb.h" /* struct nx_csbcpb */
> @@ -1101,6 +1102,12 @@ static int __init nx842_pseries_init(void)
>  		return ret;
>  	}
> =20
> +	ret =3D vas_register_api_pseries(THIS_MODULE, VAS_COP_TYPE_GZIP,
> +				       "nx-gzip");
> +
> +	if (ret)
> +		pr_err("NX-GZIP is not supported. Returned=3D%d\n", ret);
> +
>  	return 0;
>  }
> =20
> @@ -1111,6 +1118,8 @@ static void __exit nx842_pseries_exit(void)
>  	struct nx842_devdata *old_devdata;
>  	unsigned long flags;
> =20
> +	vas_unregister_api_pseries();
> +
>  	crypto_unregister_alg(&nx842_pseries_alg);
> =20
>  	spin_lock_irqsave(&devdata_mutex, flags);
> --=20
> 2.18.2
>=20
>=20
>=20