From patchwork Thu Apr 14 22:01:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 12814052 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 41340C433EF for ; Thu, 14 Apr 2022 22:01:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245615AbiDNWES (ORCPT ); Thu, 14 Apr 2022 18:04:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48722 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245126AbiDNWEJ (ORCPT ); Thu, 14 Apr 2022 18:04:09 -0400 Received: from mail-ej1-x630.google.com (mail-ej1-x630.google.com [IPv6:2a00:1450:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C3F8BA66DC; Thu, 14 Apr 2022 15:01:42 -0700 (PDT) Received: by mail-ej1-x630.google.com with SMTP id bh17so12503120ejb.8; Thu, 14 Apr 2022 15:01:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=3HuqqJ6TFrv0Wec+QhDogWW1PdyyO3M37oSooOZjklM=; b=aK7jMFu//JAMO93tr5N0H6x+6BVfiC1kWxpUKqIv6bAAVZrbCC35IcXTQdR5ppf4Yk Bxcx5Guumz40rr8pdOiKfdzNBqhF84Z9ZxniQrE/8n9ffKLnVs/ZGspSFOVoLJ7t90VN A4J2fF/MO4Z/aUM0cd9MfPoNBCJWwe1B09z7vcDwPldoPLtYIvlaXnxIcFf5tSvN/S4/ WkSFbCikXjKrU/8U4ZFOYyh/a29s132RJWGSjifhLfia93ADx1C0UOX8Ethno3AWSO68 B1Uq/PhDvL0IPFTOZpoP95wRrjY/TsXuSp99BeZsaree8p7KHlokJnJlMoOytdcoQJ5C SjiQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=3HuqqJ6TFrv0Wec+QhDogWW1PdyyO3M37oSooOZjklM=; b=bnwv7a4esS/I+YU2JwIoLP22Ffwis4gGmVUMLCKy+y6MwqIZtFoiXLWKPvXUakO4d7 CHKeT2CmIyK0E1s5qo7oFhv+rvO8qy7uvOgnkXvBQWgHK7DI+Kv2dnmoFp9lGiM3pN/A QEB2RsiGAbjtwG19G0/oUj0Uk9AkLizTZyOjQpVzs7DsRuY8s4jRlblXiCdO4BuWFg90 b9k7XH8ILOmAT8jP3hnmrG2YXiwB0ZeIzrOPGQIuX0lD1mdDOwXEh6UEK14gmDgtGdZo uUU+sreuWnBTpQkDCwnEZxII8GnRfylVkw5tSzlEsP7ffulg7ZAgFwhm1ZyggWzSc+Pi Siog== X-Gm-Message-State: AOAM533yG34H2wsq/5pq3B48kxVVFwNVTi2c/0L7jUXLQwjSAUY0SMti /IBciBNzkLlckms0q1BwoXE= X-Google-Smtp-Source: ABdhPJzBWemjPsbUBDy+qiL1YPkFpFFTYIU3ys1ZIXkyNzACh2+aG69PH4I8lD+OsV1Vb/0AZlkIEA== X-Received: by 2002:a17:906:32d0:b0:6ce:e1cf:3f2e with SMTP id k16-20020a17090632d000b006cee1cf3f2emr3876722ejk.214.1649973701365; Thu, 14 Apr 2022 15:01:41 -0700 (PDT) Received: from linux.. (p5dd1ed70.dip0.t-ipconnect.de. [93.209.237.112]) by smtp.gmail.com with ESMTPSA id e15-20020a170906044f00b006e897e110fcsm1060948eja.48.2022.04.14.15.01.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Apr 2022 15:01:40 -0700 (PDT) From: Bean Huo 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, daejun7.park@samsung.com, powen.kao@mediatek.com Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 4/4] scsi: ufshpb: Add device reset HPB regions Infor handling for HPB device mode Date: Fri, 15 Apr 2022 00:01:27 +0200 Message-Id: <20220414220127.587917-5-huobean@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220414220127.587917-1-huobean@gmail.com> References: <20220414220127.587917-1-huobean@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bean Huo In UFS HPB Spec JESD220-3A, "5.8. Active and inactive information upon power cycle ... When the device is powered off by the host, the device may restore L2P map data upon power up or build from the host’s HPB READ command. In case device powered up and lost HPB information, device can signal to the host through HPB Sense data, by setting HPB Operation as ‘2’ which will inform the host that device reset HPB information." So, for the HPB device mode, if the UFS device is reset by the RST_N pin, the active regions's information in the device will be reset, and then the device will notify the host side that it is recommended to deactivate all active region in the host HPB memory. Signed-off-by: Bean Huo --- drivers/scsi/ufs/ufshpb.c | 73 ++++++++++++++++++++++++++++----------- 1 file changed, 53 insertions(+), 20 deletions(-) diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c index ac442f19d7f7..82ca0dd5097c 100644 --- a/drivers/scsi/ufs/ufshpb.c +++ b/drivers/scsi/ufs/ufshpb.c @@ -1143,6 +1143,39 @@ static int ufshpb_add_region(struct ufshpb_lu *hpb, struct ufshpb_region *rgn) spin_unlock_irqrestore(&hpb->rgn_state_lock, flags); return ret; } +/** + *ufshpb_update_region_inactive - update a region to be deactivated later + *@hpb: per-LU HPB instance + *@region_index: the region index will be activated later + */ +static void ufshpb_update_region_inactive(struct ufshpb_lu *hpb, int region_index) +{ + int subregion_index; + struct ufshpb_region *rgn; + struct ufshpb_subregion *srgn; + + /* + * Delete this region from acctive list and add it to inactive list + */ + spin_lock(&hpb->rsp_list_lock); + ufshpb_update_inactive_info(hpb, region_index); + spin_unlock(&hpb->rsp_list_lock); + + rgn = hpb->rgn_tbl + region_index; + + /* + * Set subregion state to be HPB_SRGN_INVALID, there will no HPB read on this subregion + */ + spin_lock(&hpb->rgn_state_lock); + if (rgn->rgn_state != HPB_RGN_INACTIVE) { + for (subregion_index = 0; subregion_index < rgn->srgn_cnt; subregion_index++) { + srgn = rgn->srgn_tbl + subregion_index; + if (srgn->srgn_state == HPB_SRGN_VALID) + srgn->srgn_state = HPB_SRGN_INVALID; + } + } + spin_unlock(&hpb->rgn_state_lock); +} static void ufshpb_rsp_req_region_update(struct ufshpb_lu *hpb, struct utp_hpb_rsp *rsp_field) @@ -1202,25 +1235,8 @@ static void ufshpb_rsp_req_region_update(struct ufshpb_lu *hpb, for (i = 0; i < rsp_field->inactive_rgn_cnt; i++) { rgn_i = be16_to_cpu(rsp_field->hpb_inactive_field[i]); - dev_dbg(&hpb->sdev_ufs_lu->sdev_dev, - "inactivate(%d) region %d\n", i, rgn_i); - - spin_lock(&hpb->rsp_list_lock); - ufshpb_update_inactive_info(hpb, rgn_i); - spin_unlock(&hpb->rsp_list_lock); - - rgn = hpb->rgn_tbl + rgn_i; - - spin_lock(&hpb->rgn_state_lock); - if (rgn->rgn_state != HPB_RGN_INACTIVE) { - for (srgn_i = 0; srgn_i < rgn->srgn_cnt; srgn_i++) { - srgn = rgn->srgn_tbl + srgn_i; - if (srgn->srgn_state == HPB_SRGN_VALID) - srgn->srgn_state = HPB_SRGN_INVALID; - } - } - spin_unlock(&hpb->rgn_state_lock); - + dev_dbg(&hpb->sdev_ufs_lu->sdev_dev, "inactivate(%d) region %d\n", i, rgn_i); + ufshpb_update_region_inactive(hpb, rgn_i); } out: @@ -1255,7 +1271,10 @@ static void ufshpb_dev_reset_handler(struct ufs_hba *hba) __shost_for_each_device(sdev, hba->host) { hpb = ufshpb_get_hpb_data(sdev); - if (hpb && hpb->is_hcm) + if (!hpb) + continue; + + if (hpb->is_hcm) { /* * For the HPB host mode, in case device powered up and lost HPB * information, we will set the region flag to be RGN_FLAG_UPDATE, @@ -1263,6 +1282,20 @@ static void ufshpb_dev_reset_handler(struct ufs_hba *hba) * in the UFS device). */ ufshpb_set_region_update(hpb); + } else { + /* + * For the HPB device mode, we add all active regions to inactive list, + * they will be inactivated later in ufshpb_map_work_handler() + */ + struct victim_select_info *lru_info = &hpb->lru_info; + struct ufshpb_region *rgn; + + list_for_each_entry(rgn, &lru_info->lh_lru_rgn, list_lru_rgn) + ufshpb_update_region_inactive(hpb, rgn->rgn_idx); + + if (ufshpb_get_state(hpb) == HPB_PRESENT) + queue_work(ufshpb_wq, &hpb->map_work); + } } }