From nobody Tue Feb 10 11:23:57 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (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 AE3CD28A720; Thu, 8 May 2025 19:41:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746733307; cv=none; b=p0SWAdWMX7eph0OPqoUsxrZxj48Jv7iQ96LteAfQfoayOUO3fzDjFECk1sOpqiejWcV2rvXCwH/1OnHfqgmmDVVkUDxDxci1T7Wn5ibLPy6kbkb4bc/hwIDNLuMEaVboDq/+VN4U+r3yKTM7ams5rx8uDeiyXUzt7B+4rT3N1W0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746733307; c=relaxed/simple; bh=cw35xIKM3GQ7IYN44nqMVxUAoNpG2Du37jUAD6lMlcs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=okJmoSHo8OgF6XsiwYxYaqafu/UJ4wgJ7JwEwreF3O9agDsOOTg/upuDdPKFe+HqC/CAXjQhPXfdoZIbCUyDn63cC/3QZbE60qlW/CGGG4wfxbkGBPSwNHii7OZkj1D2rrRQ2LkMMbCxkYLdyMDWSG4XAzCinRrX7LBWzXT1T7c= 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=bxis3f6D; arc=none smtp.client-ip=192.198.163.17 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="bxis3f6D" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1746733306; x=1778269306; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=cw35xIKM3GQ7IYN44nqMVxUAoNpG2Du37jUAD6lMlcs=; b=bxis3f6Dr4pj0BZzEdLSMDtJ2GLtUXvn9xvgUbW+P02ntkgECa1dpM/W M2aYKJ9cjPS1DwjRNzJxoN0TbEeg16OmZWtron+dmdBbL8QPdoF0/8IZ3 QVuYK7Wtd8s2l+t89aDDsdZ7Pbi6OT6Oe2EWxtZ3t45snvT6ds2tdOWYI hI+DZoSJrZcj+gOJ7gOdB8tKtepkkDYk8/Yy4iTOm96ucqwK6aXU27Xly fi5ehlrRepB3y4+JLzonPXxT6XJ2JFszyI1GanYCStWhWakjf4wR9uJiJ r6BIK5eOB03F0Mo78A0jH/8dXg6M5r3XuMEt0DZRpReysCU7qL4ATQYRr g==; X-CSE-ConnectionGUID: B+56qbRfSBmt9GK58i/Msg== X-CSE-MsgGUID: BaB6jL3vTHmu/5W+Hrs32A== X-IronPort-AV: E=McAfee;i="6700,10204,11427"; a="48454700" X-IronPort-AV: E=Sophos;i="6.15,273,1739865600"; d="scan'208";a="48454700" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 May 2025 12:41:42 -0700 X-CSE-ConnectionGUID: YpFzO/86RtSHtUCgGnfk6g== X-CSE-MsgGUID: 050zpBjPSv2w1g071KVj/Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,273,1739865600"; d="scan'208";a="136880863" Received: from jf5300-b11a338t.jf.intel.com ([10.242.51.115]) by fmviesa010.fm.intel.com with ESMTP; 08 May 2025 12:41:41 -0700 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, 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 v9 10/19] crypto: acomp - New interfaces to facilitate batching support in acomp & drivers. Date: Thu, 8 May 2025 12:41:25 -0700 Message-Id: <20250508194134.28392-11-kanchana.p.sridhar@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20250508194134.28392-1-kanchana.p.sridhar@intel.com> References: <20250508194134.28392-1-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 get_batch_size(), batch_compress() and batch_decompress() interfaces to: struct acomp_alg struct crypto_acomp A crypto_acomp compression algorithm that supports batching of compressions and decompressions must provide implementations for these API, so that a higher level module based on crypto_acomp, such as zswap, can allocate resources for submitting multiple compress/decompress jobs that can be batched, and invoke batching of [de]compressions. A new helper function acomp_has_async_batching() can be invoked to query if a crypto_acomp has registered these batching interfaces. Further, zswap can invoke the newly added "crypto_acomp_batch_size()" API to query the maximum number of requests that can be batch [de]compressed. crypto_acomp_batch_size() returns 1 if the acomp has not provided an implementation for get_batch_size(). 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. This allows the iaa_crypto Intel IAA driver to register implementations for the get_batch_size(), batch_compress() and batch_decompress() acomp_alg interfaces, that can subsequently be invoked from zswap to compress/decompress pages in parallel in the IAA hardware accelerator to improve swapout/swapin performance, through these newly added corresponding crypto_acomp API: crypto_acomp_batch_size() crypto_acomp_batch_compress() crypto_acomp_batch_decompress() Signed-off-by: Kanchana P Sridhar --- crypto/acompress.c | 3 + include/crypto/acompress.h | 107 ++++++++++++++++++++++++++++ include/crypto/internal/acompress.h | 20 ++++++ 3 files changed, 130 insertions(+) diff --git a/crypto/acompress.c b/crypto/acompress.c index d08e0fe8cd9e..c7cca5596acf 100644 --- a/crypto/acompress.c +++ b/crypto/acompress.c @@ -95,6 +95,9 @@ static int crypto_acomp_init_tfm(struct crypto_tfm *tfm) =20 acomp->compress =3D alg->compress; acomp->decompress =3D alg->decompress; + acomp->get_batch_size =3D alg->get_batch_size; + acomp->batch_compress =3D alg->batch_compress; + acomp->batch_decompress =3D alg->batch_decompress; acomp->reqsize =3D alg->reqsize; =20 acomp->base.exit =3D crypto_acomp_exit_tfm; diff --git a/include/crypto/acompress.h b/include/crypto/acompress.h index 939e51d122b0..e50f3e71ba58 100644 --- a/include/crypto/acompress.h +++ b/include/crypto/acompress.h @@ -120,6 +120,10 @@ struct acomp_req { * * @compress: Function performs a compress operation * @decompress: Function performs a de-compress operation + * @get_batch_size: Maximum batch-size for batching compress/decompress + * operations. + * @batch_compress: Function performs a batch compress operation. + * @batch_decompress: Function performs a batch decompress operation. * @reqsize: Context size for (de)compression requests * @fb: Synchronous fallback tfm * @base: Common crypto API algorithm data structure @@ -127,6 +131,22 @@ struct acomp_req { struct crypto_acomp { int (*compress)(struct acomp_req *req); int (*decompress)(struct acomp_req *req); + unsigned int (*get_batch_size)(void); + bool (*batch_compress)( + struct acomp_req *reqs[], + struct page *pages[], + u8 *dsts[], + unsigned int dlens[], + int errors[], + int nr_reqs); + bool (*batch_decompress)( + struct acomp_req *reqs[], + u8 *srcs[], + struct page *pages[], + unsigned int slens[], + unsigned int dlens[], + int errors[], + int nr_reqs); unsigned int reqsize; struct crypto_acomp *fb; struct crypto_tfm base; @@ -224,6 +244,13 @@ static inline bool acomp_is_async(struct crypto_acomp = *tfm) CRYPTO_ALG_ASYNC; } =20 +static inline bool acomp_has_async_batching(struct crypto_acomp *tfm) +{ + return (acomp_is_async(tfm) && + (crypto_comp_alg_common(tfm)->base.cra_flags & CRYPTO_ALG_TYPE_ACOMPRESS= ) && + tfm->get_batch_size && tfm->batch_compress && tfm->batch_decompress); +} + static inline struct crypto_acomp *crypto_acomp_reqtfm(struct acomp_req *r= eq) { return __crypto_acomp_tfm(req->base.tfm); @@ -595,4 +622,84 @@ static inline struct acomp_req *acomp_request_on_stack= _init( return 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: crypto_acomp's batch size. + */ +static inline unsigned int crypto_acomp_batch_size(struct crypto_acomp *tf= m) +{ + if (acomp_has_async_batching(tfm)) + return tfm->get_batch_size(); + + return 1; +} + +/** + * crypto_acomp_batch_compress() -- Invoke asynchronous compress of a batch + * of requests. + * + * @reqs: @nr_reqs asynchronous compress requests. + * @pages: Pages to be compressed by IAA. + * @dsts: Pre-allocated destination buffers to store results of compressio= n. + * Each element of @dsts must be of size "PAGE_SIZE * 2". + * @dlens: Will contain the compressed lengths for @pages. + * @errors: zero on successful compression of the corresponding + * req, or error code in case of error. + * @nr_reqs: The number of requests in @reqs, up to IAA_CRYPTO_MAX_BATCH_S= IZE, + * to be compressed. + * + * Returns true if all compress requests in the batch complete successfull= y, + * false otherwise. + */ +static inline bool crypto_acomp_batch_compress( + struct acomp_req *reqs[], + struct page *pages[], + u8 *dsts[], + unsigned int dlens[], + int errors[], + int nr_reqs) +{ + struct crypto_acomp *tfm =3D crypto_acomp_reqtfm(reqs[0]); + + return tfm->batch_compress(reqs, pages, dsts, dlens, errors, nr_reqs); +} + +/** + * crypto_acomp_batch_decompress() -- Invoke asynchronous decompress of a = batch + * of requests. + * + * @reqs: @nr_reqs asynchronous decompress requests. + * @srcs: Source buffers to to be decompressed. + * @pages: Destination pages corresponding to @srcs. + * @slens: Buffer lengths for @srcs. + * @dlens: Will contain the decompressed lengths for @srcs. + * For batch decompressions, the caller must enforce additional + * semantics such as, BUG_ON(dlens[i] !=3D PAGE_SIZE) assertions. + * @errors: zero on successful decompression of the corresponding + * req, or error code in case of error. + * @nr_reqs: The number of requests in @reqs, up to IAA_CRYPTO_MAX_BATCH_S= IZE, + * to be decompressed. + * + * Returns true if all decompress requests in the batch complete successfu= lly, + * false otherwise. + */ +static inline bool crypto_acomp_batch_decompress( + struct acomp_req *reqs[], + u8 *srcs[], + struct page *pages[], + unsigned int slens[], + unsigned int dlens[], + int errors[], + int nr_reqs) +{ + struct crypto_acomp *tfm =3D crypto_acomp_reqtfm(reqs[0]); + + return tfm->batch_decompress(reqs, srcs, pages, slens, dlens, errors, nr_= reqs); +} + #endif diff --git a/include/crypto/internal/acompress.h b/include/crypto/internal/= acompress.h index b69d818d7e68..891e40831af8 100644 --- a/include/crypto/internal/acompress.h +++ b/include/crypto/internal/acompress.h @@ -23,6 +23,10 @@ * * @compress: Function performs a compress operation * @decompress: Function performs a de-compress operation + * @get_batch_size: Maximum batch-size for batching compress/decompress + * operations. + * @batch_compress: Function performs a batch compress operation. + * @batch_decompress: Function performs a batch decompress operation. * @init: Initialize the cryptographic transformation object. * This function is used to initialize the cryptographic * transformation object. This function is called only once at @@ -43,6 +47,22 @@ struct acomp_alg { int (*compress)(struct acomp_req *req); int (*decompress)(struct acomp_req *req); + unsigned int (*get_batch_size)(void); + bool (*batch_compress)( + struct acomp_req *reqs[], + struct page *pages[], + u8 *dsts[], + unsigned int dlens[], + int errors[], + int nr_reqs); + bool (*batch_decompress)( + struct acomp_req *reqs[], + u8 *srcs[], + struct page *pages[], + unsigned int slens[], + unsigned int dlens[], + int errors[], + int nr_reqs); int (*init)(struct crypto_acomp *tfm); void (*exit)(struct crypto_acomp *tfm); =20 --=20 2.27.0