From patchwork Thu Mar 31 15:36:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cabiddu, Giovanni" X-Patchwork-Id: 555670 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 49481C433EF for ; Thu, 31 Mar 2022 15:40:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238109AbiCaPmJ (ORCPT ); Thu, 31 Mar 2022 11:42:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239210AbiCaPlT (ORCPT ); Thu, 31 Mar 2022 11:41:19 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57C5922322F for ; Thu, 31 Mar 2022 08:36:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1648741017; x=1680277017; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Du4pgWMX3S8uy0yKfNcOQV8+Au4FhYTFrto3T2LHkjE=; b=gaRmUlb1xYRatosaXwsqjNl8rFbD7hpqLCD3UCHiB24MUTotTU/Nw/RY VVQmj+VO5gIiXpXxNzq8YNxVuzp8+IpPWwqfIl/9Wppr2IIji25nzxMiy 0f06oDkZHi2o5vySnlW62iE6thl3ODcdv4aSKXGYmFkaJeN8w1ZIk+fZe RLTxQzucXcdDgwqA5SuGXH8OY/tEABQpssEsoGMShO8AI1qudk0faVVo6 EAObCICMUcDEZMgF9D+Z3LP/1RbO77ndAqvwoKEEW7ItOg6+8Uezwwu8X DLSkPNRAJcuPfk4Se/9qXSM4EquHqBUx2+uw7aUSd3+JGiRcLYSayQ2HX Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10302"; a="242022730" X-IronPort-AV: E=Sophos;i="5.90,225,1643702400"; d="scan'208";a="242022730" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Mar 2022 08:36:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,225,1643702400"; d="scan'208";a="555124758" Received: from silpixa00400314.ir.intel.com (HELO silpixa00400314.ger.corp.intel.com) ([10.237.222.76]) by fmsmga007.fm.intel.com with ESMTP; 31 Mar 2022 08:36:54 -0700 From: Giovanni Cabiddu To: herbert@gondor.apana.org.au Cc: linux-crypto@vger.kernel.org, qat-linux@intel.com, marco.chiappero@intel.com, Giovanni Cabiddu Subject: [PATCH v2 0/4] crypto: qat - fix dm-crypt related issues Date: Thu, 31 Mar 2022 16:36:48 +0100 Message-Id: <20220331153652.37020-1-giovanni.cabiddu@intel.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Organization: Intel Research and Development Ireland Ltd - Co. Reg. #308263 - Collinstown Industrial Park, Leixlip, County Kildare - Ireland Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org This set fixes the issues related with the dm-crypt + QAT driver use-case. The first patch fixes a potential dead-lock that might occur when using dm-crypt + QAT in out of memory conditions. The datapaths of the aead and skcipher implementations have been changed to use pre-allocated buffers that are part of the request contexts. The also removes the CRYPTO_ALG_ALLOCATES_MEMORY flag from the aead and skcipher implementations. The second patch refactors the submission logic in preparation for the introduction of a backlog queue to handle crypto requests with the CRYPTO_TFM_REQ_MAY_BACKLOG flag set. The third patch addresses a stall in the dm-crypt + QAT usecase by adding support for the CRYPTO_TFM_REQ_MAY_BACKLOG flag. If the HW queue is full, the driver enqueues the request in a list and resubmit it at a later time, avoiding losing it. The last, re-enables the crypto instances in the QAT driver which were disabled due to the issues above. Changes from v1: - Patch #3: removed worqueues. Requests in the backlog queue are now resubmitted in the context of the callback of a previously submitted request. This reduces the CPU utilization as the resubmit backlog function always finds a free slot in the HW queues when resubmits a job. Giovanni Cabiddu (4): crypto: qat - use pre-allocated buffers in datapath crypto: qat - refactor submission logic crypto: qat - add backlog mechanism crypto: qat - re-enable registration of algorithms drivers/crypto/qat/qat_4xxx/adf_drv.c | 7 - drivers/crypto/qat/qat_common/Makefile | 1 + drivers/crypto/qat/qat_common/adf_transport.c | 11 ++ drivers/crypto/qat/qat_common/adf_transport.h | 1 + .../qat/qat_common/adf_transport_internal.h | 1 + drivers/crypto/qat/qat_common/qat_algs.c | 150 ++++++++++-------- drivers/crypto/qat/qat_common/qat_algs_send.c | 84 ++++++++++ drivers/crypto/qat/qat_common/qat_algs_send.h | 11 ++ drivers/crypto/qat/qat_common/qat_asym_algs.c | 56 ++++--- drivers/crypto/qat/qat_common/qat_crypto.c | 10 +- drivers/crypto/qat/qat_common/qat_crypto.h | 39 +++++ 11 files changed, 269 insertions(+), 102 deletions(-) create mode 100644 drivers/crypto/qat/qat_common/qat_algs_send.c create mode 100644 drivers/crypto/qat/qat_common/qat_algs_send.h