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Bottomley" , "Martin K. Petersen" , Peter Wang , "Matthias Brugger" , AngeloGioacchino Del Regno CC: Alim Akhtar , Avri Altman , Bart Van Assche , Stanley Jhu , , , , , , Subject: [PATCH V5 0/2] Add CPU latency QoS support for ufs driver Date: Wed, 13 Dec 2023 18:13:51 +0530 Message-ID: <20231213124353.16407-1-quic_mnaresh@quicinc.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: FxrZR76C2h8_9kIEmAF5KyQQYVu3uH-F X-Proofpoint-GUID: FxrZR76C2h8_9kIEmAF5KyQQYVu3uH-F X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_01,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 lowpriorityscore=0 spamscore=0 adultscore=0 clxscore=1015 malwarescore=0 priorityscore=1501 bulkscore=0 impostorscore=0 phishscore=0 suspectscore=0 mlxlogscore=717 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312130093 Add CPU latency QoS support for ufs driver. This improves random io performance by 15% for ufs. tiotest benchmark tool io performance results on sm8550 platform: 1. Without PM QoS support Type (Speed in) | Average of 18 iterations Random Read(IPOS) | 37101.3 Random Write(IPOS) | 41065.13 2. With PM QoS support Type (Speed in) | Average of 18 iterations Random Read(IPOS) | 42943.4 Random Write(IPOS) | 46784.9 (Improvement with PM QoS = ~15%). This patch is based on below patch by Stanley Chu [1]. Moving the PM QoS code to ufshcd.c and making it generic. [1] https://lore.kernel.org/r/20220623035052.18802-8-stanley.chu@mediatek.com Changes from v4: - Addressed angelogioacchino's comments to update commit text - Addressed angelogioacchino's comments to code alignment Changes from v3: - Removed UFSHCD_CAP_PM_QOS capability flag from patch#2 Changes from v2: - Addressed bvanassche and mani comments - Provided sysfs interface to enable/disable PM QoS feature Changes from v1: - Addressed bvanassche comments to have the code in core ufshcd - Design is changed from per-device PM QoS to CPU latency QoS based support - Reverted existing PM QoS feature from MEDIATEK UFS driver - Added PM QoS capability for both QCOM and MEDIATEK SoCs Maramaina Naresh (2): ufs: core: Add CPU latency QoS support for ufs driver ufs: ufs-mediatek: Migrate to UFSHCD generic CPU latency PM QoS support drivers/ufs/core/ufshcd.c | 125 ++++++++++++++++++++++++++++++++ drivers/ufs/host/ufs-mediatek.c | 17 ----- drivers/ufs/host/ufs-mediatek.h | 3 - include/ufs/ufshcd.h | 6 ++ 4 files changed, 131 insertions(+), 20 deletions(-)