From patchwork Wed May 10 05:24:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Bao D. Nguyen" X-Patchwork-Id: 680818 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 C969BC77B7D for ; Wed, 10 May 2023 05:26:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235735AbjEJF0D (ORCPT ); Wed, 10 May 2023 01:26:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36796 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229524AbjEJF0A (ORCPT ); Wed, 10 May 2023 01:26:00 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 165C74EC0; Tue, 9 May 2023 22:25:50 -0700 (PDT) Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34A5LPEC019903; Wed, 10 May 2023 05:25:38 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=9rljmIBbVbexzgTu0xwlPNsb6fltOx7OyMS8C21bpBY=; b=V6vWBX3X4c4hsCPofOmOtzXZftjPaKRKugb9fX07z0Xkc2u8oRrNqpXrRSEDf6RoR7Eh CZHSwyNPeJfjL7EDo9XPyxo3/oCp4DotY/c6lnRAVjSdfc805AxJwuOiPutTt77F8t1W Qrf2VT3zSyV1sP188/PDA9uSebH8gDCfkSX/hK+hBumEfLr8aAGzl13yWRGReTdT0O6W jtjgOmR2shZXirBtN3YSHzxgbXKQREwsZNede8eJqT3KYcifIcUuy1T1v2o7XTqqFtcS 6B5g6Q/J67aDGXW3wfrnt5uaChKB7ZplBX+ULMEZupzDanN2586fOBBdp1i6sQMUcwOK JQ== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qfysdrgkh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 05:25:38 +0000 Received: from nasanex01a.na.qualcomm.com (nasanex01a.na.qualcomm.com [10.52.223.231]) by NASANPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 34A5Pbkf024608 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 05:25:37 GMT Received: from stor-berry.qualcomm.com (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Tue, 9 May 2023 22:25:36 -0700 From: "Bao D. Nguyen" To: , , , , , , , , CC: , "Bao D. Nguyen" , Alim Akhtar , "James E.J. Bottomley" , open list Subject: [PATCH v3 2/7] ufs: core: Update the ufshcd_clear_cmds() functionality Date: Tue, 9 May 2023 22:24:23 -0700 Message-ID: <6c9990cd13220ceea343b1e5ba463732c4ccffb9.1683688693.git.quic_nguyenb@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: crn19goY7Vxldcqv5TYBf7RO0cOck5nh X-Proofpoint-ORIG-GUID: crn19goY7Vxldcqv5TYBf7RO0cOck5nh X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-05-10_02,2023-05-05_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 lowpriorityscore=0 phishscore=0 malwarescore=0 suspectscore=0 spamscore=0 clxscore=1015 mlxlogscore=999 impostorscore=0 adultscore=0 priorityscore=1501 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305100042 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org In the ufshcd_clear_cmds(), the 2nd pamameter would be the bit mask of the command to be cleared in the transfer request door bell register. This bit mask mechanism does not scale well in mcq mode when the queue depth becomes much greater than 64. Change the 2nd parameter to the function to be the task_tag number of the corresponding to the bit to be cleared in the door bell register. By doing so, mcq mode with a large queue depth can reuse this function. Signed-off-by: Bao D. Nguyen Reviewed-by: Bart Van Assche --- drivers/ufs/core/ufshcd.c | 37 +++++++++++++++++++++---------------- 1 file changed, 21 insertions(+), 16 deletions(-) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 5527d45..3a7e853 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -3006,13 +3006,15 @@ static int ufshcd_compose_dev_cmd(struct ufs_hba *hba, } /* - * Clear all the requests from the controller for which a bit has been set in - * @mask and wait until the controller confirms that these requests have been - * cleared. + * Clear the pending command in the controller and wait until + * the controller confirms that the command has been cleared. + * @hba: per adapter instance + * @task_tag: The tag number of the command to be cleared. */ -static int ufshcd_clear_cmds(struct ufs_hba *hba, u32 mask) +static int ufshcd_clear_cmds(struct ufs_hba *hba, u32 task_tag) { unsigned long flags; + u32 mask = 1U << task_tag; /* clear outstanding transaction before retry */ spin_lock_irqsave(hba->host->host_lock, flags); @@ -3113,7 +3115,7 @@ static int ufshcd_wait_for_dev_cmd(struct ufs_hba *hba, err = -ETIMEDOUT; dev_dbg(hba->dev, "%s: dev_cmd request timedout, tag %d\n", __func__, lrbp->task_tag); - if (ufshcd_clear_cmds(hba, 1U << lrbp->task_tag) == 0) { + if (ufshcd_clear_cmds(hba, lrbp->task_tag) == 0) { /* successfully cleared the command, retry if needed */ err = -EAGAIN; /* @@ -7286,7 +7288,7 @@ static int ufshcd_eh_device_reset_handler(struct scsi_cmnd *cmd) unsigned long flags, pending_reqs = 0, not_cleared = 0; struct Scsi_Host *host; struct ufs_hba *hba; - u32 pos; + u32 pos, not_cleared_mask = 0; int err; u8 resp = 0xF, lun; @@ -7309,17 +7311,20 @@ static int ufshcd_eh_device_reset_handler(struct scsi_cmnd *cmd) hba->outstanding_reqs &= ~pending_reqs; spin_unlock_irqrestore(&hba->outstanding_lock, flags); - if (ufshcd_clear_cmds(hba, pending_reqs) < 0) { - spin_lock_irqsave(&hba->outstanding_lock, flags); - not_cleared = pending_reqs & - ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); - hba->outstanding_reqs |= not_cleared; - spin_unlock_irqrestore(&hba->outstanding_lock, flags); + for_each_set_bit(pos, &pending_reqs, hba->nutrs) { + if (ufshcd_clear_cmds(hba, pos) < 0) { + spin_lock_irqsave(&hba->outstanding_lock, flags); + not_cleared = 1U << pos & + ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); + hba->outstanding_reqs |= not_cleared; + not_cleared_mask |= not_cleared; + spin_unlock_irqrestore(&hba->outstanding_lock, flags); - dev_err(hba->dev, "%s: failed to clear requests %#lx\n", - __func__, not_cleared); + dev_err(hba->dev, "%s: failed to clear requests %#lx\n", + __func__, not_cleared); + } } - __ufshcd_transfer_req_compl(hba, pending_reqs & ~not_cleared); + __ufshcd_transfer_req_compl(hba, pending_reqs & ~not_cleared_mask); out: hba->req_abort_count = 0; @@ -7416,7 +7421,7 @@ static int ufshcd_try_to_abort_task(struct ufs_hba *hba, int tag) goto out; } - err = ufshcd_clear_cmds(hba, 1U << tag); + err = ufshcd_clear_cmds(hba, tag); if (err) dev_err(hba->dev, "%s: Failed clearing cmd at tag %d, err %d\n", __func__, tag, err);