From nobody Wed Dec 17 10:46:27 2025 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 92E7531BC96; Tue, 4 Nov 2025 09:12:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762247574; cv=none; b=IcZ+ffGXkNpsWvgTz+BRLyh3PYAI4vd+VmlOpvM4VHYomFxZIZ+OzfLtXxljSYfeusLBVokpNiuf3oI0FUhpRz676HExxcxvpMPTktd3I7HGinS3GJV1Nr/I0yevWnohvpR2p4OPQRn3VbdmNwtc79mE7Gvz6vM8T5lRVAVe3Fs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762247574; c=relaxed/simple; bh=vCApmtmMXoGN5S/Qb3qu/+sfAmKpMxg+chJJ85/VF+M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=pONcUVipPTsf0aSuRbXLmDPoVSV3HMzvcH6p25GGTVq9vRjOdnIu4/V8LpGQote/PsVRiN/bYNcVBWAg45HUu9uncokBbkFtJ2tonGgmYRhHhjfeBh2UV8B1D5Oh+PKoouUXYJ0PvCypbSww+w79+bmXZc396tYOmJqTLrSVPSU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=UfFGMb9G; arc=none smtp.client-ip=192.198.163.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="UfFGMb9G" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1762247572; x=1793783572; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=vCApmtmMXoGN5S/Qb3qu/+sfAmKpMxg+chJJ85/VF+M=; b=UfFGMb9G2R1h0+BnuN+evBor7WMqPWtzcuagnibImYKSPIok6MqUlBOy RzB/jATFuGqrqCq68Q/WuxAL71tzrL5OVEr99PyzK040rvtgsI4+h9yni F4eeRqY/Ns/QKlQs3YqEBx3p1hiZO1Q/U+pmnPlVoxo8iiD+/Xg8bYx1K ytWZ2J6twOJKKm+KhBkXV6gzfw/ezqwUquWaYh6OcV12CoAurcapkuKn6 SpTg+biI0g0LggWAsYSRfKFzJgjvkWZKci8+YZBoKXCMGqR3EebTuNGrY mLkeqk7/SGy1ncR1P+2H8SCljEuSN3CKiJlobQy++8slcLQ1HhRXPRgdj w==; X-CSE-ConnectionGUID: iCrMArO1QqKr3kMz2AtYoQ== X-CSE-MsgGUID: c2EogSl2SYy47suq+wWy4g== X-IronPort-AV: E=McAfee;i="6800,10657,11602"; a="89798690" X-IronPort-AV: E=Sophos;i="6.19,278,1754982000"; d="scan'208";a="89798690" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Nov 2025 01:12:39 -0800 X-CSE-ConnectionGUID: B5B5oAOhTrqeoAjYGQrftA== X-CSE-MsgGUID: hO5Z+nCcQpKR/y3sWsGqpQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,278,1754982000"; d="scan'208";a="186795829" Received: from jf5300-b11a338t.jf.intel.com ([10.242.51.115]) by orviesa009.jf.intel.com with ESMTP; 04 Nov 2025 01:12:40 -0800 From: Kanchana P Sridhar To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, hannes@cmpxchg.org, yosry.ahmed@linux.dev, nphamcs@gmail.com, chengming.zhou@linux.dev, usamaarif642@gmail.com, ryan.roberts@arm.com, 21cnbao@gmail.com, ying.huang@linux.alibaba.com, akpm@linux-foundation.org, senozhatsky@chromium.org, sj@kernel.org, kasong@tencent.com, linux-crypto@vger.kernel.org, herbert@gondor.apana.org.au, davem@davemloft.net, clabbe@baylibre.com, ardb@kernel.org, ebiggers@google.com, surenb@google.com, kristen.c.accardi@intel.com, vinicius.gomes@intel.com Cc: wajdi.k.feghali@intel.com, vinodh.gopal@intel.com, kanchana.p.sridhar@intel.com Subject: [PATCH v13 18/22] crypto: acomp - Add crypto_acomp_batch_size() to get an algorithm's batch-size. Date: Tue, 4 Nov 2025 01:12:31 -0800 Message-Id: <20251104091235.8793-19-kanchana.p.sridhar@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20251104091235.8793-1-kanchana.p.sridhar@intel.com> References: <20251104091235.8793-1-kanchana.p.sridhar@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This commit adds a @batch_size data member to struct acomp_alg. An acomp_alg compression algorithm that supports batching of compressions and decompressions must provide a @batch_size greater than one, representing the maximum batch-size that the compressor supports, so that kernel users of crypto_acomp, such as zswap, can allocate resources for submitting multiple compress/decompress jobs that can be batched, and invoke batching of [de]compressions. The new crypto_acomp_batch_size() API queries the crypto_acomp's acomp_alg for the batch-size. If the acomp_alg has registered a @batch_size greater than 1, this is returned. If not, a default of "1" is returned. zswap can invoke crypto_acomp_batch_size() to query the maximum number of requests that can be batch [de]compressed. Based on this, zswap can use the minimum of any zswap-specific upper limits for batch-size and the compressor's max @batch_size, to allocate batching resources. The IAA acomp_algs Fixed ("deflate-iaa") and Dynamic ("deflate-iaa-dynamic") register @batch_size as IAA_CRYPTO_MAX_BATCH_SIZE. This enables zswap to compress/decompress pages in parallel in the IAA hardware accelerator to improve swapout/swapin performance and memory savings. Signed-off-by: Kanchana P Sridhar --- crypto/acompress.c | 14 ++++++++++++++ drivers/crypto/intel/iaa/iaa_crypto_main.c | 2 ++ include/crypto/acompress.h | 12 ++++++++++++ include/crypto/internal/acompress.h | 3 +++ 4 files changed, 31 insertions(+) diff --git a/crypto/acompress.c b/crypto/acompress.c index be28cbfd22e3..61ad81b06f49 100644 --- a/crypto/acompress.c +++ b/crypto/acompress.c @@ -305,6 +305,20 @@ int crypto_acomp_decompress(struct acomp_req *req) } EXPORT_SYMBOL_GPL(crypto_acomp_decompress); =20 +unsigned int crypto_acomp_batch_size(struct crypto_acomp *tfm) +{ + if (acomp_is_async(tfm) && + (crypto_comp_alg_common(tfm)->base.cra_flags & CRYPTO_ALG_TYPE_ACOMPRESS= )) { + struct acomp_alg *alg =3D crypto_acomp_alg(tfm); + + if (alg && alg->batch_size > 1) + return alg->batch_size; + } + + return 1; +} +EXPORT_SYMBOL_GPL(crypto_acomp_batch_size); + void comp_prepare_alg(struct comp_alg_common *alg) { struct crypto_alg *base =3D &alg->base; diff --git a/drivers/crypto/intel/iaa/iaa_crypto_main.c b/drivers/crypto/in= tel/iaa/iaa_crypto_main.c index 37e1cc720e5d..2db2ddd4cb49 100644 --- a/drivers/crypto/intel/iaa/iaa_crypto_main.c +++ b/drivers/crypto/intel/iaa/iaa_crypto_main.c @@ -2671,6 +2671,7 @@ static struct acomp_alg iaa_acomp_fixed_deflate =3D { .init =3D iaa_comp_init_fixed, .compress =3D iaa_comp_acompress_main, .decompress =3D iaa_comp_adecompress_main, + .batch_size =3D IAA_CRYPTO_MAX_BATCH_SIZE, .base =3D { .cra_name =3D "deflate", .cra_driver_name =3D "deflate-iaa", @@ -2696,6 +2697,7 @@ static struct acomp_alg iaa_acomp_dynamic_deflate =3D= { .init =3D iaa_comp_init_dynamic, .compress =3D iaa_comp_acompress_main, .decompress =3D iaa_comp_adecompress_main, + .batch_size =3D IAA_CRYPTO_MAX_BATCH_SIZE, .base =3D { .cra_name =3D "deflate", .cra_driver_name =3D "deflate-iaa-dynamic", diff --git a/include/crypto/acompress.h b/include/crypto/acompress.h index 0f1334168f1b..6385f9b78a0d 100644 --- a/include/crypto/acompress.h +++ b/include/crypto/acompress.h @@ -578,6 +578,18 @@ int crypto_acomp_compress(struct acomp_req *req); */ int crypto_acomp_decompress(struct acomp_req *req); =20 +/** + * crypto_acomp_batch_size() -- Get the algorithm's batch size + * + * Function returns the algorithm's batch size for batching operations + * + * @tfm: ACOMPRESS tfm handle allocated with crypto_alloc_acomp() + * + * Return: @tfm's acomp_alg's @batch_size, if it has defined a + * @batch_size greater than 1; else return 1. + */ +unsigned int crypto_acomp_batch_size(struct crypto_acomp *tfm); + static inline struct acomp_req *acomp_request_on_stack_init( char *buf, struct crypto_acomp *tfm) { diff --git a/include/crypto/internal/acompress.h b/include/crypto/internal/= acompress.h index 2d97440028ff..e451e0ae3b9b 100644 --- a/include/crypto/internal/acompress.h +++ b/include/crypto/internal/acompress.h @@ -28,6 +28,8 @@ * * @compress: Function performs a compress operation * @decompress: Function performs a de-compress operation + * @batch_size: Maximum batch-size for batching compress/decompress + * operations. * @init: Initialize the cryptographic transformation object. * This function is used to initialize the cryptographic * transformation object. This function is called only once at @@ -46,6 +48,7 @@ struct acomp_alg { int (*compress)(struct acomp_req *req); int (*decompress)(struct acomp_req *req); + unsigned int batch_size; int (*init)(struct crypto_acomp *tfm); void (*exit)(struct crypto_acomp *tfm); =20 --=20 2.27.0