From patchwork Wed Sep 23 06:39:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daejun Park X-Patchwork-Id: 296682 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06207C4363D for ; Wed, 23 Sep 2020 06:43:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3F421221E8 for ; Wed, 23 Sep 2020 06:43:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="jD7sR21C" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726617AbgIWGnG (ORCPT ); Wed, 23 Sep 2020 02:43:06 -0400 Received: from mailout3.samsung.com ([203.254.224.33]:23796 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726179AbgIWGnF (ORCPT ); Wed, 23 Sep 2020 02:43:05 -0400 Received: from epcas1p4.samsung.com (unknown [182.195.41.48]) by mailout3.samsung.com (KnoxPortal) with ESMTP id 20200923064302epoutp0349216613ebbf5cfc71f6563b8bf226f4~3VpMrXMDX1966919669epoutp03C for ; Wed, 23 Sep 2020 06:43:02 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout3.samsung.com 20200923064302epoutp0349216613ebbf5cfc71f6563b8bf226f4~3VpMrXMDX1966919669epoutp03C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1600843382; bh=5iNQbtCWJAUnXvSo1tG2deaYT/5yB/Uu2Lig/XZ+kp8=; h=Subject:Reply-To:From:To:CC:Date:References:From; b=jD7sR21ChAHk+ES4setwTuAuQ2uNDdw0jawE9PH7HHTHAL4tgwoP4WBYkNu6pGXlv fnJCovO+wtQ3jIZOTfIskLiBDnMrb6Xdil9Q3U2/ctGOVZ8ufF327VZgvfyixusUjD g8Lc4DLDHiIYnHZ8kL4ciUlSTaIJ34CdDogDf2aE= Received: from epcpadp2 (unknown [182.195.40.12]) by epcas1p3.samsung.com (KnoxPortal) with ESMTP id 20200923064302epcas1p38730ee2fe750fe22f90f231c6901c255~3VpMQLk7z0661606616epcas1p3d; Wed, 23 Sep 2020 06:43:02 +0000 (GMT) Mime-Version: 1.0 Subject: [PATCH v12 0/4] scsi: ufs: Add Host Performance Booster Support Reply-To: daejun7.park@samsung.com Sender: Daejun Park From: Daejun Park To: "avri.altman@wdc.com" , "jejb@linux.ibm.com" , "martin.petersen@oracle.com" , "asutoshd@codeaurora.org" , "beanhuo@micron.com" , "stanley.chu@mediatek.com" , "cang@codeaurora.org" , "bvanassche@acm.org" , "tomas.winkler@intel.com" , ALIM AKHTAR , Daejun Park CC: "linux-scsi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Sang-yoon Oh , Sung-Jun Park , yongmyung lee , Jinyoung CHOI , Adel Choi , BoRam Shin , SEUNGUK SHIN X-Priority: 3 X-Content-Kind-Code: NORMAL X-CPGS-Detection: blocking_info_exchange X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <231786897.01600843382167.JavaMail.epsvc@epcpadp2> Date: Wed, 23 Sep 2020 15:39:22 +0900 X-CMS-MailID: 20200923063922epcms2p8ba87e252935bc8cc10f55639c0e2d601 X-Sendblock-Type: AUTO_CONFIDENTIAL X-CPGSPASS: Y X-CPGSPASS: Y X-Hop-Count: 3 X-CMS-RootMailID: 20200923063922epcms2p8ba87e252935bc8cc10f55639c0e2d601 References: Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Changelog: v11 -> v12 1. Fixed to return error value when HPB fails to initialize pinned active region. 2. Fixed to disable HPB feature if HPB fails to allocate essential memory and workqueue. 3. Fixed to change proper sub-region state when region is already evicted. v10 -> v11 Add a newline at end the last line on Kconfig file. v9 -> v10 1. Fixed 64-bit division error 2. Fixed problems commentted in Bart's review. v8 -> v9 1. Change sysfs initialization. 2. Change reading descriptor during HPB initialization 3. Fixed problems commentted in Bart's review. 4. Change base commit from 5.9/scsi-queue to 5.10/scsi-queue. v7 -> v8 Remove wrongly added tags. v6 -> v7 1. Remove UFS feature layer. 2. Cleanup for sparse error. v5 -> v6 Change base commit to b53293fa662e28ae0cdd40828dc641c09f133405 v4 -> v5 Delete unused macro define. v3 -> v4 1. Cleanup. v2 -> v3 1. Add checking input module parameter value. 2. Change base commit from 5.8/scsi-queue to 5.9/scsi-queue. 3. Cleanup for unused variables and label. v1 -> v2 1. Change the full boilerplate text to SPDX style. 2. Adopt dynamic allocation for sub-region data structure. 3. Cleanup. NAND flash memory-based storage devices use Flash Translation Layer (FTL) to translate logical addresses of I/O requests to corresponding flash memory addresses. Mobile storage devices typically have RAM with constrained size, thus lack in memory to keep the whole mapping table. Therefore, mapping tables are partially retrieved from NAND flash on demand, causing random-read performance degradation. To improve random read performance, JESD220-3 (HPB v1.0) proposes HPB (Host Performance Booster) which uses host system memory as a cache for the FTL mapping table. By using HPB, FTL data can be read from host memory faster than from NAND flash memory. The current version only supports the DCM (device control mode). This patch consists of 3 parts to support HPB feature. 1) HPB probe and initialization process 2) READ -> HPB READ using cached map information 3) L2P (logical to physical) map management In the HPB probe and init process, the device information of the UFS is queried. After checking supported features, the data structure for the HPB is initialized according to the device information. A read I/O in the active sub-region where the map is cached is changed to HPB READ by the HPB. The HPB manages the L2P map using information received from the device. For active sub-region, the HPB caches through ufshpb_map request. For the in-active region, the HPB discards the L2P map. When a write I/O occurs in an active sub-region area, associated dirty bitmap checked as dirty for preventing stale read. HPB is shown to have a performance improvement of 58 - 67% for random read workload. [1] This series patches are based on the 5.10/scsi-queue branch. [1]: https://www.usenix.org/conference/hotstorage17/program/presentation/jeong Daejun park (4): scsi: ufs: Add HPB feature related parameters scsi: ufs: Introduce HPB feature scsi: ufs: L2P map management for HPB read scsi: ufs: Prepare HPB read for cached sub-region drivers/scsi/ufs/Kconfig | 10 + drivers/scsi/ufs/Makefile | 1 + drivers/scsi/ufs/ufs.h | 47 + drivers/scsi/ufs/ufshcd.c | 60 ++ drivers/scsi/ufs/ufshcd.h | 23 +- drivers/scsi/ufs/ufshpb.c | 1855 ++++++++++++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufshpb.h | 229 +++++ 7 files changed, 2224 insertions(+), 1 deletion(-) 7 files changed, 2217 insertions(+), 1 deletion(-) created mode 100644 drivers/scsi/ufs/ufshpb.c created mode 100644 drivers/scsi/ufs/ufshpb.h