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[95.91.252.200]) by smtp.gmail.com with ESMTPSA id s9sm17638864wrg.27.2020.04.16.13.31.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Apr 2020 13:31:42 -0700 (PDT) From: huobean@gmail.com X-Google-Original-From: beanhuo@micron.com To: alim.akhtar@samsung.com, avri.altman@wdc.com, asutoshd@codeaurora.org, jejb@linux.ibm.com, martin.petersen@oracle.com, stanley.chu@mediatek.com, beanhuo@micron.com, bvanassche@acm.org, tomas.winkler@intel.com, cang@codeaurora.org Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/5] UFS Host Performance Booster (HPB v1.0) driver Date: Thu, 16 Apr 2020 22:31:21 +0200 Message-Id: <20200416203126.1210-1-beanhuo@micron.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bean Huo Hi, I disclose my development/changes on UFS HPB (UFS Host Performance Booster) to the community, as this would enable more UFS developers to test and start an iterative review and update process. The HPB is defined in Jedec Standard Universal Flash (UFS) Host Performance Booster (HPB) Extension Version 1.0, which is designed to improve read performance by utilizing the host side memory. Based on our testing, the HPB can increase the random read performance by up to about 46% in the random read. The original HPB driver is from [1]. Based on it, I did optimizations, simplifications, fixed reliability issues, implemented HPB host control mode and make it much more readable. which's pushed to here [2] as V1. To avoid touching the traditional SCSI core, the HPB driver in this series HPB patch chooses to develop under SCSI sub-system layer, and sits the same layer with UFSHCD. At the same time, to minimize changes to UFSHCD driver, the HPB driver submits its HPB READ BUFFER and HPB WRITE BUFFER requests to the scsi device->request_queueu to execute, rather than that directly go through raw UPIU request path. v1--v2: 1. Rebased the patch on the [3] branch 5.8/scsi-queue 1. Optimized and simplified several functions 2. Add parameter read_threshold in HPB sysfs, by which the user can change read_threshold for the HPB host control mode 3. Add HPB memory limitation, let the user adjust its size according to the system memory capacity [1] https://github.com/OpenMPDK/HPBDriver [2] https://www.spinics.net/lists/kernel/msg3449471.html [3] https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git Bean Huo (5): scsi; ufs: add device descriptor for Host Performance Booster scsi: ufs: make ufshcd_read_unit_desc_param() non-static func scsi: ufs: add ufs_features parameter in structure ufs_dev_info scsi: ufs: add unit and geometry parameters for HPB scsi: ufs: UFS Host Performance Booster(HPB) driver drivers/scsi/ufs/Kconfig | 62 + drivers/scsi/ufs/Makefile | 1 + drivers/scsi/ufs/ufs.h | 15 + drivers/scsi/ufs/ufshcd.c | 66 +- drivers/scsi/ufs/ufshcd.h | 15 +- drivers/scsi/ufs/ufshpb.c | 3279 +++++++++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufshpb.h | 450 +++++ 7 files changed, 3881 insertions(+), 7 deletions(-) create mode 100644 drivers/scsi/ufs/ufshpb.c create mode 100644 drivers/scsi/ufs/ufshpb.h -- 2.17.1