From patchwork Sat Dec 21 06:31:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kanchana P Sridhar X-Patchwork-Id: 13917676 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D0A7E7718C for ; Sat, 21 Dec 2024 06:31:25 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B810A6B0082; Sat, 21 Dec 2024 01:31:24 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id B33706B0088; Sat, 21 Dec 2024 01:31:24 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9AA436B0089; Sat, 21 Dec 2024 01:31:24 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 717CF6B0082 for ; Sat, 21 Dec 2024 01:31:24 -0500 (EST) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id DDD57453E0 for ; Sat, 21 Dec 2024 06:31:23 +0000 (UTC) X-FDA: 82917992808.08.6900645 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.20]) by imf11.hostedemail.com (Postfix) with ESMTP id 81F5740010 for ; Sat, 21 Dec 2024 06:30:49 +0000 (UTC) Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=RuqGt3qw; spf=pass (imf11.hostedemail.com: domain of kanchana.p.sridhar@intel.com designates 198.175.65.20 as permitted sender) smtp.mailfrom=kanchana.p.sridhar@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1734762645; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=j09iz0OD1z1YiiDL7jnjnfrhkKEs6U8kjIjjSzbz1Po=; b=CYU86+L6d92iJJy1MUFiO1T990510h8i3oJVR+WN0LhbgQUmHiqZuuqIgMytDd14T3bkYP 1cAWIZo1rGJAlW+cTyl3uFS47JUGjqz5jzf5SlHo8GKpTQPQcf19A4T41MUAza5EzaBHm2 1R6IcRlWGKUSaMyu3KVehbOg3f3E50w= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=RuqGt3qw; spf=pass (imf11.hostedemail.com: domain of kanchana.p.sridhar@intel.com designates 198.175.65.20 as permitted sender) smtp.mailfrom=kanchana.p.sridhar@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1734762645; a=rsa-sha256; cv=none; b=DTJfN10n0dQ6hakIqhLra9wzbK5LlXUwCD8N7NRdN4CFyaC4qzB7XE0dqYl7IfQnN3v8a0 ftGOQ606/1IDfP9qdrlESmvBZe+Q/DZDdnj6v/GnJvAmXpp1lXmufiFJq84n7hOmFpxNtc rqACQ32nVLECs5z7QUvFHUb+zWvEQW4= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1734762682; x=1766298682; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GAptaIbchIxwIxRKd6dyx7Yd4Mfg9kgBdBXC6xe2nEA=; b=RuqGt3qwacr/uKRhM1QwrWOzudA51/vHneG0CeYb8Y/yEJedzxAMyeQG Ntlee91qOyYQTJfm17P8zD+TfuJ6Jkl8rPOX0MKaOHDaxnkzcUrbWWP5P z0cz8ob2YvAFYYhJPmzwTfa1B+qZE1KXC6FxA4UFiIv7Cj0P/YxShf2Gt TK6f2Nf+C64aUpTDBk0ZonyJO9nN9NzQIoyVqZZQCm55IdM3AwZf4pfS3 0oZH6b0HG70MCv+XfkwF+xZQ3zWZynWb5praRglEbsJsjZWVIVRlhTiwB N4hPy0q7fysm//iIQttkjka/Mlf8HLl3+dOlNzXIVEG2PRJvh3VzKBxIq g==; X-CSE-ConnectionGUID: 9r1q8DvxRKil3SmeyXcDgw== X-CSE-MsgGUID: l0dn6NmBRN+QSFtKBIdWkQ== X-IronPort-AV: E=McAfee;i="6700,10204,11292"; a="35021613" X-IronPort-AV: E=Sophos;i="6.12,253,1728975600"; d="scan'208";a="35021613" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Dec 2024 22:31:19 -0800 X-CSE-ConnectionGUID: GYDOmzRzSnWyfnodOTeO/w== X-CSE-MsgGUID: lC5AYj8BQGSYFnxYoRe+xw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="99184575" Received: from jf5300-b11a338t.jf.intel.com ([10.242.51.115]) by orviesa007.jf.intel.com with ESMTP; 20 Dec 2024 22:31:20 -0800 From: Kanchana P Sridhar To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, hannes@cmpxchg.org, yosryahmed@google.com, nphamcs@gmail.com, chengming.zhou@linux.dev, usamaarif642@gmail.com, ryan.roberts@arm.com, 21cnbao@gmail.com, akpm@linux-foundation.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 Cc: wajdi.k.feghali@intel.com, vinodh.gopal@intel.com, kanchana.p.sridhar@intel.com Subject: [PATCH v5 01/12] crypto: acomp - Add synchronous/asynchronous acomp request chaining. Date: Fri, 20 Dec 2024 22:31:08 -0800 Message-Id: <20241221063119.29140-2-kanchana.p.sridhar@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20241221063119.29140-1-kanchana.p.sridhar@intel.com> References: <20241221063119.29140-1-kanchana.p.sridhar@intel.com> MIME-Version: 1.0 X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 81F5740010 X-Rspam-User: X-Stat-Signature: kcmw639sw793fhe7yem341et7qdxp6we X-HE-Tag: 1734762649-129806 X-HE-Meta: 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 2IjrFz4X CaoxFdWfbXV2kL/AHSRn25Y+HIwNWF74R/sOeoqKeTvGBNWvI8f57pBMDLGgzsJz/em1n6SWkDabSZ39fWh2FUwT7eFBrnwcezg1L2eKMgRjitYUmY6iKiR7p/oBMhpP+UpVbB8IAnyq4Ts6dE45dSfV4zVEi25XxBRwbrnlyCf6JHE6MyhGCg4wd4v5RQkkumccbFJMGvTQIt+dgpziM6EvGpY66psuABsAoNvXxJbXh3/8AqJjxndWXLidP/zWNuGIl X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: This patch is based on Herbert Xu's request chaining for ahash ("[PATCH 2/6] crypto: hash - Add request chaining API") [1]. The generic framework for request chaining that's provided in the ahash implementation has been used as reference to develop a similar synchronous request chaining framework for crypto_acomp. Furthermore, this commit develops an asynchronous request chaining framework and API that iaa_crypto can use for request chaining with parallelism, in order to fully benefit from Intel IAA's multiple compress/decompress engines in hardware. This allows us to gain significant latency improvements with IAA batching as compared to synchronous request chaining. Usage of acomp request chaining API: ==================================== Any crypto_acomp compressor can avail of request chaining as follows: by calling one of Step 1: Create request chain: Request 0 (the first req in the chain): void acomp_reqchain_init(struct acomp_req *req, u32 flags, crypto_completion_t compl, void *data); Subsequent requests: void acomp_request_chain(struct acomp_req *req, struct acomp_req *head); Step 2: Process the request chain using the specified compress/decompress "op": 2.a) Synchronous: the chain of requests is processed in series: int acomp_do_req_chain(struct acomp_req *req, int (*op)(struct acomp_req *req)); 2.b) Asynchronous: the chain of requests is processed in parallel using a submit-poll paradigm: int acomp_do_async_req_chain(struct acomp_req *req, int (*op_submit)(struct acomp_req *req), int (*op_poll)(struct acomp_req *req)); Request chaining will be used in subsequent patches to implement compress/decompress batching in the iaa_crypto driver for the two supported IAA driver sync_modes: sync_mode = 'sync' will use (2.a), sync_mode = 'async' will use (2.b). These files are directly re-used from [1] which is not yet merged: include/crypto/algapi.h include/linux/crypto.h Hence, I am adding Herbert as the co-developer of this acomp request chaining patch. [1]: https://lore.kernel.org/linux-crypto/677614fbdc70b31df2e26483c8d2cd1510c8af91.1730021644.git.herbert@gondor.apana.org.au/ Suggested-by: Herbert Xu Signed-off-by: Kanchana P Sridhar Co-developed-by: Herbert Xu Signed-off-by: --- crypto/acompress.c | 284 ++++++++++++++++++++++++++++ include/crypto/acompress.h | 41 ++++ include/crypto/algapi.h | 10 + include/crypto/internal/acompress.h | 10 + include/linux/crypto.h | 31 +++ 5 files changed, 376 insertions(+) diff --git a/crypto/acompress.c b/crypto/acompress.c index 6fdf0ff9f3c0..cb6444d09dd7 100644 --- a/crypto/acompress.c +++ b/crypto/acompress.c @@ -23,6 +23,19 @@ struct crypto_scomp; static const struct crypto_type crypto_acomp_type; +struct acomp_save_req_state { + struct list_head head; + struct acomp_req *req0; + struct acomp_req *cur; + int (*op)(struct acomp_req *req); + crypto_completion_t compl; + void *data; +}; + +static void acomp_reqchain_done(void *data, int err); +static int acomp_save_req(struct acomp_req *req, crypto_completion_t cplt); +static void acomp_restore_req(struct acomp_req *req); + static inline struct acomp_alg *__crypto_acomp_alg(struct crypto_alg *alg) { return container_of(alg, struct acomp_alg, calg.base); @@ -123,6 +136,277 @@ struct crypto_acomp *crypto_alloc_acomp_node(const char *alg_name, u32 type, } EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node); +static int acomp_save_req(struct acomp_req *req, crypto_completion_t cplt) +{ + struct crypto_acomp *tfm = crypto_acomp_reqtfm(req); + struct acomp_save_req_state *state; + gfp_t gfp; + u32 flags; + + if (!acomp_is_async(tfm)) + return 0; + + flags = acomp_request_flags(req); + gfp = (flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? GFP_KERNEL : GFP_ATOMIC; + state = kmalloc(sizeof(*state), gfp); + if (!state) + return -ENOMEM; + + state->compl = req->base.complete; + state->data = req->base.data; + state->req0 = req; + + req->base.complete = cplt; + req->base.data = state; + + return 0; +} + +static void acomp_restore_req(struct acomp_req *req) +{ + struct crypto_acomp *tfm = crypto_acomp_reqtfm(req); + struct acomp_save_req_state *state; + + if (!acomp_is_async(tfm)) + return; + + state = req->base.data; + + req->base.complete = state->compl; + req->base.data = state->data; + kfree(state); +} + +static int acomp_reqchain_finish(struct acomp_save_req_state *state, + int err, u32 mask) +{ + struct acomp_req *req0 = state->req0; + struct acomp_req *req = state->cur; + struct acomp_req *n; + + req->base.err = err; + + if (req == req0) + INIT_LIST_HEAD(&req->base.list); + else + list_add_tail(&req->base.list, &req0->base.list); + + list_for_each_entry_safe(req, n, &state->head, base.list) { + list_del_init(&req->base.list); + + req->base.flags &= mask; + req->base.complete = acomp_reqchain_done; + req->base.data = state; + state->cur = req; + err = state->op(req); + + if (err == -EINPROGRESS) { + if (!list_empty(&state->head)) + err = -EBUSY; + goto out; + } + + if (err == -EBUSY) + goto out; + + req->base.err = err; + list_add_tail(&req->base.list, &req0->base.list); + } + + acomp_restore_req(req0); + +out: + return err; +} + +static void acomp_reqchain_done(void *data, int err) +{ + struct acomp_save_req_state *state = data; + crypto_completion_t compl = state->compl; + + data = state->data; + + if (err == -EINPROGRESS) { + if (!list_empty(&state->head)) + return; + goto notify; + } + + err = acomp_reqchain_finish(state, err, CRYPTO_TFM_REQ_MAY_BACKLOG); + if (err == -EBUSY) + return; + +notify: + compl(data, err); +} + +int acomp_do_req_chain(struct acomp_req *req, + int (*op)(struct acomp_req *req)) +{ + struct crypto_acomp *tfm = crypto_acomp_reqtfm(req); + struct acomp_save_req_state *state; + struct acomp_save_req_state state0; + int err = 0; + + if (!acomp_request_chained(req) || list_empty(&req->base.list) || + !crypto_acomp_req_chain(tfm)) + return op(req); + + state = &state0; + + if (acomp_is_async(tfm)) { + err = acomp_save_req(req, acomp_reqchain_done); + if (err) { + struct acomp_req *r2; + + req->base.err = err; + list_for_each_entry(r2, &req->base.list, base.list) + r2->base.err = err; + + return err; + } + + state = req->base.data; + } + + state->op = op; + state->cur = req; + INIT_LIST_HEAD(&state->head); + list_splice(&req->base.list, &state->head); + + err = op(req); + if (err == -EBUSY || err == -EINPROGRESS) + return -EBUSY; + + return acomp_reqchain_finish(state, err, ~0); +} +EXPORT_SYMBOL_GPL(acomp_do_req_chain); + +static void acomp_async_reqchain_done(struct acomp_req *req0, + struct list_head *state, + int (*op_poll)(struct acomp_req *req)) +{ + struct acomp_req *req, *n; + bool req0_done = false; + int err; + + while (!list_empty(state)) { + + if (!req0_done) { + err = op_poll(req0); + if (!(err == -EAGAIN || err == -EINPROGRESS || err == -EBUSY)) { + req0->base.err = err; + req0_done = true; + } + } + + list_for_each_entry_safe(req, n, state, base.list) { + err = op_poll(req); + + if (err == -EAGAIN || err == -EINPROGRESS || err == -EBUSY) + continue; + + req->base.err = err; + list_del_init(&req->base.list); + list_add_tail(&req->base.list, &req0->base.list); + } + } + + while (!req0_done) { + err = op_poll(req0); + if (!(err == -EAGAIN || err == -EINPROGRESS || err == -EBUSY)) { + req0->base.err = err; + break; + } + } +} + +static int acomp_async_reqchain_finish(struct acomp_req *req0, + struct list_head *state, + int (*op_submit)(struct acomp_req *req), + int (*op_poll)(struct acomp_req *req)) +{ + struct acomp_req *req, *n; + int err = 0; + + INIT_LIST_HEAD(&req0->base.list); + + list_for_each_entry_safe(req, n, state, base.list) { + BUG_ON(req == req0); + + err = op_submit(req); + + if (!(err == -EINPROGRESS || err == -EBUSY)) { + req->base.err = err; + list_del_init(&req->base.list); + list_add_tail(&req->base.list, &req0->base.list); + } + } + + acomp_async_reqchain_done(req0, state, op_poll); + + return req0->base.err; +} + +int acomp_do_async_req_chain(struct acomp_req *req, + int (*op_submit)(struct acomp_req *req), + int (*op_poll)(struct acomp_req *req)) +{ + struct crypto_acomp *tfm = crypto_acomp_reqtfm(req); + struct list_head state; + struct acomp_req *r2; + int err = 0; + void *req0_data = req->base.data; + + if (!acomp_request_chained(req) || list_empty(&req->base.list) || + !acomp_is_async(tfm) || !crypto_acomp_req_chain(tfm)) { + + err = op_submit(req); + + if (err == -EINPROGRESS || err == -EBUSY) { + bool req0_done = false; + + while (!req0_done) { + err = op_poll(req); + if (!(err == -EAGAIN || err == -EINPROGRESS || err == -EBUSY)) { + req->base.err = err; + break; + } + } + } else { + req->base.err = err; + } + + req->base.data = req0_data; + if (acomp_is_async(tfm)) + req->base.complete(req->base.data, req->base.err); + + return err; + } + + err = op_submit(req); + req->base.err = err; + + if (err && !(err == -EINPROGRESS || err == -EBUSY)) + goto err_prop; + + INIT_LIST_HEAD(&state); + list_splice(&req->base.list, &state); + + err = acomp_async_reqchain_finish(req, &state, op_submit, op_poll); + req->base.data = req0_data; + req->base.complete(req->base.data, req->base.err); + + return err; + +err_prop: + list_for_each_entry(r2, &req->base.list, base.list) + r2->base.err = err; + + return err; +} +EXPORT_SYMBOL_GPL(acomp_do_async_req_chain); + struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp) { struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); diff --git a/include/crypto/acompress.h b/include/crypto/acompress.h index 54937b615239..eadc24514056 100644 --- a/include/crypto/acompress.h +++ b/include/crypto/acompress.h @@ -206,6 +206,7 @@ static inline void acomp_request_set_callback(struct acomp_req *req, req->base.data = data; req->base.flags &= CRYPTO_ACOMP_ALLOC_OUTPUT; req->base.flags |= flgs & ~CRYPTO_ACOMP_ALLOC_OUTPUT; + req->base.flags &= ~CRYPTO_TFM_REQ_CHAIN; } /** @@ -237,6 +238,46 @@ static inline void acomp_request_set_params(struct acomp_req *req, req->flags |= CRYPTO_ACOMP_ALLOC_OUTPUT; } +static inline u32 acomp_request_flags(struct acomp_req *req) +{ + return req->base.flags; +} + +static inline void acomp_reqchain_init(struct acomp_req *req, + u32 flags, crypto_completion_t compl, + void *data) +{ + acomp_request_set_callback(req, flags, compl, data); + crypto_reqchain_init(&req->base); +} + +static inline void acomp_reqchain_clear(struct acomp_req *req, void *data) +{ + struct crypto_wait *wait = (struct crypto_wait *)data; + reinit_completion(&wait->completion); + crypto_reqchain_clear(&req->base); + acomp_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, + crypto_req_done, data); +} + +static inline void acomp_request_chain(struct acomp_req *req, + struct acomp_req *head) +{ + crypto_request_chain(&req->base, &head->base); +} + +int acomp_do_req_chain(struct acomp_req *req, + int (*op)(struct acomp_req *req)); + +int acomp_do_async_req_chain(struct acomp_req *req, + int (*op_submit)(struct acomp_req *req), + int (*op_poll)(struct acomp_req *req)); + +static inline int acomp_request_err(struct acomp_req *req) +{ + return req->base.err; +} + /** * crypto_acomp_compress() -- Invoke asynchronous compress operation * diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h index 156de41ca760..c5df380c7d08 100644 --- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -271,4 +271,14 @@ static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm) return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK; } +static inline bool crypto_request_chained(struct crypto_async_request *req) +{ + return req->flags & CRYPTO_TFM_REQ_CHAIN; +} + +static inline bool crypto_tfm_req_chain(struct crypto_tfm *tfm) +{ + return tfm->__crt_alg->cra_flags & CRYPTO_ALG_REQ_CHAIN; +} + #endif /* _CRYPTO_ALGAPI_H */ diff --git a/include/crypto/internal/acompress.h b/include/crypto/internal/acompress.h index 8831edaafc05..53b4ef59b48c 100644 --- a/include/crypto/internal/acompress.h +++ b/include/crypto/internal/acompress.h @@ -84,6 +84,16 @@ static inline void __acomp_request_free(struct acomp_req *req) kfree_sensitive(req); } +static inline bool acomp_request_chained(struct acomp_req *req) +{ + return crypto_request_chained(&req->base); +} + +static inline bool crypto_acomp_req_chain(struct crypto_acomp *tfm) +{ + return crypto_tfm_req_chain(&tfm->base); +} + /** * crypto_register_acomp() -- Register asynchronous compression algorithm * diff --git a/include/linux/crypto.h b/include/linux/crypto.h index b164da5e129e..7c27d557586c 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -13,6 +13,8 @@ #define _LINUX_CRYPTO_H #include +#include +#include #include #include #include @@ -124,6 +126,9 @@ */ #define CRYPTO_ALG_FIPS_INTERNAL 0x00020000 +/* Set if the algorithm supports request chains. */ +#define CRYPTO_ALG_REQ_CHAIN 0x00040000 + /* * Transform masks and values (for crt_flags). */ @@ -133,6 +138,7 @@ #define CRYPTO_TFM_REQ_FORBID_WEAK_KEYS 0x00000100 #define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200 #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400 +#define CRYPTO_TFM_REQ_CHAIN 0x00000800 /* * Miscellaneous stuff. @@ -174,6 +180,7 @@ struct crypto_async_request { struct crypto_tfm *tfm; u32 flags; + int err; }; /** @@ -540,5 +547,29 @@ int crypto_comp_decompress(struct crypto_comp *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen); +static inline void crypto_reqchain_init(struct crypto_async_request *req) +{ + req->err = -EINPROGRESS; + req->flags |= CRYPTO_TFM_REQ_CHAIN; + INIT_LIST_HEAD(&req->list); +} + +static inline void crypto_reqchain_clear(struct crypto_async_request *req) +{ + req->flags &= ~CRYPTO_TFM_REQ_CHAIN; +} + +static inline void crypto_request_chain(struct crypto_async_request *req, + struct crypto_async_request *head) +{ + req->err = -EINPROGRESS; + list_add_tail(&req->list, &head->list); +} + +static inline bool crypto_tfm_is_async(struct crypto_tfm *tfm) +{ + return tfm->__crt_alg->cra_flags & CRYPTO_ALG_ASYNC; +} + #endif /* _LINUX_CRYPTO_H */