From patchwork Thu May 5 13:47:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 570157 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 992AAC433FE for ; Thu, 5 May 2022 13:47:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379950AbiEENvC (ORCPT ); Thu, 5 May 2022 09:51:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35110 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354819AbiEENvA (ORCPT ); Thu, 5 May 2022 09:51:00 -0400 Received: from mail-ej1-x62e.google.com (mail-ej1-x62e.google.com [IPv6:2a00:1450:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E9AA56C10; Thu, 5 May 2022 06:47:20 -0700 (PDT) Received: by mail-ej1-x62e.google.com with SMTP id g6so8866664ejw.1; Thu, 05 May 2022 06:47:20 -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=Le/mxbajMOWJ4rwuXZr5GF198bKTwEkjLMNW9f3gck8=; b=F7uHN4LQCRsa+LPIop1ceEubI1QGKhJPXINABZQ3JDtMaSgHHzSZpLE+KtygnHJGIp T2UpfWc7eJMSQL78BQqYzoVwIAmuUn6vnECAqV9hNPKWvw0QSam64B8TE3fPhMrfiZsc hGWYlwd7WTONnN/hVCecGYdllTU+oWrvUpRjGJa9yeMcTEeOX5zQG5c0D3PXWQ1FhY6A 4524fti/Qzhsfm+GzQ8L35cigMxauevG9YQ7CJOw1LogQLSUFwXC8geK4DggnM244cS2 YO6kQTlKFIZqVX+qpj8kS9V7NaSWhO1y62rKEcoxBFuqCCRDzchC9SnZfcWRtKzqmgqj DnWw== 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=Le/mxbajMOWJ4rwuXZr5GF198bKTwEkjLMNW9f3gck8=; b=KOduExPh/V0OKzHtZVnHXa+ocJ+5slIwkeoeSe4n0smOSWfDn+UE6ebIqJRQTgOohn 7AYbj9GQW0GwByiXQPqgpC/saYHVCaZGZYicr244TkyzjQW835utZ67PbWf/bTb1Gn1v nPPCN6mY/tji1JthCC7VrfK04XhucUcy74wb20bc0tHtsjjA+3yIq7NHE5O98Tf8y8+6 bKDIJXzV+jPxApg8LJNnrmLO6C2ZNSy3/E1NskAMxs6HnnnEQZ49Iv/narodi0rYcdE+ KRSfGQmNAUBjCezmJ3snaxpFvwhmvTWqe1vIbwbGBMkF1V4efEMkcG8Ia35P8zy8rxue Jp1g== X-Gm-Message-State: AOAM533uWMSsAb/bjtVeKndhC2myTGRD49xVjpDfXvK9s8JErQ0wEGEe MLRGwoylcf4TAsIVcEkQagg= X-Google-Smtp-Source: ABdhPJwOvd9CIBmxOqx5Wto9uJJfwa2V2w0gztP/K6GmTcQszXi5qSuRI1QPLBpmVetiOa+r9k8aAg== X-Received: by 2002:a17:906:7304:b0:6da:9243:865 with SMTP id di4-20020a170906730400b006da92430865mr25767004ejc.665.1651758438538; Thu, 05 May 2022 06:47:18 -0700 (PDT) Received: from linux.. (p5dd1ed70.dip0.t-ipconnect.de. [93.209.237.112]) by smtp.gmail.com with ESMTPSA id 26-20020a170906301a00b006f3ef214e69sm728324ejz.207.2022.05.05.06.47.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 May 2022 06:47:17 -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, cang@codeaurora.org, daejun7.park@samsung.com, peter.wang@mediatek.com, powen.kao@mediatek.com, keosung.park@samsung.com Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 1/6] scsi: ufshpb: Merge ufshpb_reset() and ufshpb_reset_host() Date: Thu, 5 May 2022 15:47:02 +0200 Message-Id: <20220505134707.35929-2-huobean@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220505134707.35929-1-huobean@gmail.com> References: <20220505134707.35929-1-huobean@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bean Huo There is no functional change in this patch, just merge ufshpb_reset() and ufshpb_reset_host() into one function ufshpb_toggle_state(). Reviewed-by: Keoseong Park Signed-off-by: Bean Huo --- drivers/scsi/ufs/ufshcd.c | 4 ++-- drivers/scsi/ufs/ufshpb.c | 36 +++++++++++++----------------------- drivers/scsi/ufs/ufshpb.h | 6 ++---- 3 files changed, 17 insertions(+), 29 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 2b4390a1106e..34628bbf675e 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -7229,7 +7229,7 @@ static int ufshcd_host_reset_and_restore(struct ufs_hba *hba) * Stop the host controller and complete the requests * cleared by h/w */ - ufshpb_reset_host(hba); + ufshpb_toggle_state(hba, HPB_PRESENT, HPB_RESET); ufshcd_hba_stop(hba); hba->silence_err_logs = true; ufshcd_complete_requests(hba); @@ -8196,7 +8196,7 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params) /* Enable Auto-Hibernate if configured */ ufshcd_auto_hibern8_enable(hba); - ufshpb_reset(hba); + ufshpb_toggle_state(hba, HPB_RESET, HPB_PRESENT); out: spin_lock_irqsave(hba->host->host_lock, flags); if (ret) diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c index 6e5237a041b5..5412ce6309df 100644 --- a/drivers/scsi/ufs/ufshpb.c +++ b/drivers/scsi/ufs/ufshpb.c @@ -2272,38 +2272,28 @@ static bool ufshpb_check_hpb_reset_query(struct ufs_hba *hba) return flag_res; } -void ufshpb_reset(struct ufs_hba *hba) +/** + * ufshpb_toggle_state - switch HPB state of all LUs + * @hba: per-adapter instance + * @src: expected current HPB state + * @dest: target HPB state to switch to + */ +void ufshpb_toggle_state(struct ufs_hba *hba, enum UFSHPB_STATE src, enum UFSHPB_STATE dest) { struct ufshpb_lu *hpb; struct scsi_device *sdev; shost_for_each_device(sdev, hba->host) { hpb = ufshpb_get_hpb_data(sdev); - if (!hpb) - continue; - - if (ufshpb_get_state(hpb) != HPB_RESET) - continue; - - ufshpb_set_state(hpb, HPB_PRESENT); - } -} - -void ufshpb_reset_host(struct ufs_hba *hba) -{ - struct ufshpb_lu *hpb; - struct scsi_device *sdev; - shost_for_each_device(sdev, hba->host) { - hpb = ufshpb_get_hpb_data(sdev); - if (!hpb) + if (!hpb || ufshpb_get_state(hpb) != src) continue; + ufshpb_set_state(hpb, dest); - if (ufshpb_get_state(hpb) != HPB_PRESENT) - continue; - ufshpb_set_state(hpb, HPB_RESET); - ufshpb_cancel_jobs(hpb); - ufshpb_discard_rsp_lists(hpb); + if (dest == HPB_RESET) { + ufshpb_cancel_jobs(hpb); + ufshpb_discard_rsp_lists(hpb); + } } } diff --git a/drivers/scsi/ufs/ufshpb.h b/drivers/scsi/ufs/ufshpb.h index b475dbd78988..7aa0dc58ee9f 100644 --- a/drivers/scsi/ufs/ufshpb.h +++ b/drivers/scsi/ufs/ufshpb.h @@ -288,8 +288,7 @@ static int ufshpb_prep(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) { return 0; static void ufshpb_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) {} static void ufshpb_resume(struct ufs_hba *hba) {} static void ufshpb_suspend(struct ufs_hba *hba) {} -static void ufshpb_reset(struct ufs_hba *hba) {} -static void ufshpb_reset_host(struct ufs_hba *hba) {} +static void ufshpb_toggle_state(struct ufs_hba *hba, enum UFSHPB_STATE src, enum UFSHPB_STATE dest) {} static void ufshpb_init(struct ufs_hba *hba) {} static void ufshpb_init_hpb_lu(struct ufs_hba *hba, struct scsi_device *sdev) {} static void ufshpb_destroy_lu(struct ufs_hba *hba, struct scsi_device *sdev) {} @@ -303,8 +302,7 @@ int ufshpb_prep(struct ufs_hba *hba, struct ufshcd_lrb *lrbp); void ufshpb_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp); void ufshpb_resume(struct ufs_hba *hba); void ufshpb_suspend(struct ufs_hba *hba); -void ufshpb_reset(struct ufs_hba *hba); -void ufshpb_reset_host(struct ufs_hba *hba); +void ufshpb_toggle_state(struct ufs_hba *hba, enum UFSHPB_STATE src, enum UFSHPB_STATE dest); void ufshpb_init(struct ufs_hba *hba); void ufshpb_init_hpb_lu(struct ufs_hba *hba, struct scsi_device *sdev); void ufshpb_destroy_lu(struct ufs_hba *hba, struct scsi_device *sdev); From patchwork Thu May 5 13:47:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 570156 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 6FE72C433EF for ; Thu, 5 May 2022 13:47:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354819AbiEENvF (ORCPT ); Thu, 5 May 2022 09:51:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35138 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236424AbiEENvB (ORCPT ); Thu, 5 May 2022 09:51:01 -0400 Received: from mail-ed1-x52b.google.com (mail-ed1-x52b.google.com [IPv6:2a00:1450:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D826F56FB1; Thu, 5 May 2022 06:47:21 -0700 (PDT) Received: by mail-ed1-x52b.google.com with SMTP id k27so5281177edk.4; Thu, 05 May 2022 06:47:21 -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=oUzFHC3hE5t2h2hEpNC3yEJlY0mdKqM3EtV1DCmd8D0=; b=Hw4Rv1FZo857VMcMzkbP/NlRckMrjb6LaVc/W34rmifYwa+w+HtW7CToobuVOZKHxe uYSmGpIUDOezRUgnWOyUdedYrRTxMfNuinkCZY5SABW3g4uWkXitK+Q2tJFaVAtEHl8T Har554npwR3GdE0C70jj1HmYVE65I9pPYOGNo84evkk38HuCnJUMfZVKeWAAm1dsP1FU sbZhA+m1mcEdWVw37GPDwF2kE5xCldSED5hfjZgvQDHU9YQrJeiThM7qv5AK4ruXWP3Z DW1xNgC6JODXYZ5V2VES9BLmDmNF8bY6FhfkO/f2PvBqTKUA73vlZIUBEWvzLAzFaG32 axfg== 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=oUzFHC3hE5t2h2hEpNC3yEJlY0mdKqM3EtV1DCmd8D0=; b=u+uhP1qN5X0KKCt+YibBVf4+kdNYPcW0MNtWDfVz/lU3mw7940VNV6YIHb1gK52OUB t6LgQAsSYc2H+scUXVeBhnmB4Vtd29m5ch94mOQNjDJlzeZzTcFX/2bLFHpKTXtDvjBl 63K3uYNbINotp++B60sPOfsZze/suNKiW95ESe9j+ND4bfHzADeRx3ViKzSsT8zX1AxM tBWqw7R52ztKTyaJAtBzAVQ8Yz5v8r0eX1PewxX7FhtYnq6vP5gVljzTgZ/AC9TuSfzP fKVgaIaliXDzeI8MjwsCApgIfWbSKDWm0rUGcz4po6ErCmqLMEeBuhTr+L5kfpSAgfQV FnEQ== X-Gm-Message-State: AOAM5300K78bxdcpnqQ10J8F5/WSCFGK7UMfQ8a4PIWi9T41MnyV5t/v BD7pYJ1mzFUGUxSBujyTh3Y= X-Google-Smtp-Source: ABdhPJyJdL4q8U7oYwe/rnrFKTifXUV7fNxTuXLNvsxOMg3y+OWIWr5uIetiADuFzBU7w5ZsyVb0VA== X-Received: by 2002:a05:6402:5114:b0:427:cbe5:e9bd with SMTP id m20-20020a056402511400b00427cbe5e9bdmr21532765edd.255.1651758440492; Thu, 05 May 2022 06:47:20 -0700 (PDT) Received: from linux.. (p5dd1ed70.dip0.t-ipconnect.de. [93.209.237.112]) by smtp.gmail.com with ESMTPSA id 26-20020a170906301a00b006f3ef214e69sm728324ejz.207.2022.05.05.06.47.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 May 2022 06:47:20 -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, cang@codeaurora.org, daejun7.park@samsung.com, peter.wang@mediatek.com, powen.kao@mediatek.com, keosung.park@samsung.com Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 3/6] scsi: ufshpb: Cleanup the handler when device reset HPB information Date: Thu, 5 May 2022 15:47:04 +0200 Message-Id: <20220505134707.35929-4-huobean@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220505134707.35929-1-huobean@gmail.com> References: <20220505134707.35929-1-huobean@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bean Huo "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." This patch is to clean up the handler and make the intent of this handler more readable, no functional change. Signed-off-by: Bean Huo Reviewed-by: Keoseong Park --- drivers/scsi/ufs/ufshpb.c | 35 +++++++++++++++++++++++------------ 1 file changed, 23 insertions(+), 12 deletions(-) diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c index 5412ce6309df..901e0a3d4836 100644 --- a/drivers/scsi/ufs/ufshpb.c +++ b/drivers/scsi/ufs/ufshpb.c @@ -1225,7 +1225,10 @@ static void ufshpb_rsp_req_region_update(struct ufshpb_lu *hpb, queue_work(ufshpb_wq, &hpb->map_work); } -static void ufshpb_dev_reset_handler(struct ufshpb_lu *hpb) +/* + * Set the flags of all active regions to RGN_FLAG_UPDATE to let host side reload L2P entries later + */ +static void ufshpb_set_regions_update(struct ufshpb_lu *hpb) { struct victim_select_info *lru_info = &hpb->lru_info; struct ufshpb_region *rgn; @@ -1239,6 +1242,24 @@ static void ufshpb_dev_reset_handler(struct ufshpb_lu *hpb) spin_unlock_irqrestore(&hpb->rgn_state_lock, flags); } +static void ufshpb_dev_reset_handler(struct ufs_hba *hba) +{ + struct scsi_device *sdev; + struct ufshpb_lu *hpb; + + __shost_for_each_device(sdev, hba->host) { + hpb = ufshpb_get_hpb_data(sdev); + if (hpb && 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, + * it will let host reload its L2P entries(re-activate the region + * in the UFS device). + */ + ufshpb_set_regions_update(hpb); + } +} + /* * This function will parse recommended active subregion information in sense * data field of response UPIU with SAM_STAT_GOOD state. @@ -1313,17 +1334,7 @@ void ufshpb_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) case HPB_RSP_DEV_RESET: dev_warn(&hpb->sdev_ufs_lu->sdev_dev, "UFS device lost HPB information during PM.\n"); - - if (hpb->is_hcm) { - struct scsi_device *sdev; - - __shost_for_each_device(sdev, hba->host) { - struct ufshpb_lu *h = sdev->hostdata; - - if (h) - ufshpb_dev_reset_handler(h); - } - } + ufshpb_dev_reset_handler(hba); break; default: From patchwork Thu May 5 13:47:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 570155 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 0FC69C433EF for ; Thu, 5 May 2022 13:47:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1380046AbiEENvJ (ORCPT ); Thu, 5 May 2022 09:51:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35192 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1380004AbiEENvD (ORCPT ); Thu, 5 May 2022 09:51:03 -0400 Received: from mail-ej1-x62d.google.com (mail-ej1-x62d.google.com [IPv6:2a00:1450:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66EA657983; Thu, 5 May 2022 06:47:23 -0700 (PDT) Received: by mail-ej1-x62d.google.com with SMTP id n10so8856227ejk.5; Thu, 05 May 2022 06:47:23 -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=9QKZUK4bdyy+uG1UycNOMbAlDaNnK9qZ/IqgLIv4+L0=; b=RiGqbaZJ8DLPVryr8gOo9oueAC2XT77ogsIkuaiqlVj69JfMvdEe496R/G/toqFuEM dTAimQcK/DoQebyrEB3/KhKSoNEFd68d9XgCapVgKYZ87kSkFpJDeJF+3P9XUphy6DrN z6KWdaXPnSJ3WbbB131BvFUcKZXsqsV6SVhPLm7JpZmw7XdMx2rjQITbbbqMFI1kDZZ1 LWkaH62GZP/80oWWhHRyXMDpVL+WZfcZGw9O7T5lLpWYtWV9hpFvXbJZW2+cM93/1AOh MWBM+LYb8DxFeMO5FZLV8INzBQvE9wdoLkbvWamiPa2BGAtCcUwXLTuiVy9xitY3Ql+y Dgig== 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=9QKZUK4bdyy+uG1UycNOMbAlDaNnK9qZ/IqgLIv4+L0=; b=tCYqgUiPyAkT3oeDNFPSqpF1pWltzLWvP3OdVIklEHM/JGh+X50KvxGQ9EYgGNnNS6 rGmYpdAu5Q9JMoGV6oDrM29RP3riO/v9hjdvtHbIISGVDnbCNK1eXuNUmsK76sPpsB1B ya12t+SA10VL0jimweGj+ayI0RhkIVSnlErwnQYVj61mC94byDfG8n2qnZVXdkR3vUXA XO+UT3IdMItHbi2ukPCafdwSbitLY4rPonzRror1x6KMpnZi6OCUGKJC/Nfg2ZkMFQ7E AaeMYYI8TvRqrOm8q4mMGZBxe+QLFkiUYgre+miqNXbbhjQGy7OYZR4wwHpJ5lTEWvJp wumQ== X-Gm-Message-State: AOAM533pDsSd7xQEM3eAjyujhifC5Hla8hXZZ8tbDmHEYnCBKFa4N4fe Dm/p1X1x+3X9je92nHtxfK4= X-Google-Smtp-Source: ABdhPJwMlMoacefutCUyt8y8KcI2wSgS3+M9++q/aKOSi01UzKpkx35l/ntWLSBfHe/OHSFBZAsuSw== X-Received: by 2002:a17:906:a454:b0:6f3:98ab:473d with SMTP id cb20-20020a170906a45400b006f398ab473dmr25960129ejb.423.1651758441986; Thu, 05 May 2022 06:47:21 -0700 (PDT) Received: from linux.. (p5dd1ed70.dip0.t-ipconnect.de. [93.209.237.112]) by smtp.gmail.com with ESMTPSA id 26-20020a170906301a00b006f3ef214e69sm728324ejz.207.2022.05.05.06.47.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 May 2022 06:47:21 -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, cang@codeaurora.org, daejun7.park@samsung.com, peter.wang@mediatek.com, powen.kao@mediatek.com, keosung.park@samsung.com Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 5/6] scsi: ufshpb: Add handing of device reset HPB regions Infos in HPB device mode Date: Thu, 5 May 2022 15:47:06 +0200 Message-Id: <20220505134707.35929-6-huobean@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220505134707.35929-1-huobean@gmail.com> References: <20220505134707.35929-1-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." Therefore, for HPB device control mode, if the UFS device is reset via the RST_N pin, the active region information in the device will be reset. If the host side receives this notification from the device side, it is recommended to inactivate all active regions in the host's HPB cache. Signed-off-by: Bean Huo Reviewed-by: Keoseong Park --- drivers/scsi/ufs/ufshpb.c | 82 +++++++++++++++++++++++++++------------ 1 file changed, 58 insertions(+), 24 deletions(-) diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c index 4833f20cc7d0..859e7ee7bf57 100644 --- a/drivers/scsi/ufs/ufshpb.c +++ b/drivers/scsi/ufs/ufshpb.c @@ -1137,6 +1137,39 @@ static int ufshpb_add_region(struct ufshpb_lu *hpb, struct ufshpb_region *rgn) spin_unlock_irqrestore(&hpb->rgn_state_lock, flags); return ret; } +/** + *ufshpb_submit_region_inactive() - submit a region to be inactivated later + *@hpb: per-LU HPB instance + *@region_index: the index associated with the region that will be inactivated later + */ +static void ufshpb_submit_region_inactive(struct ufshpb_lu *hpb, int region_index) +{ + int subregion_index; + struct ufshpb_region *rgn; + struct ufshpb_subregion *srgn; + + /* + * Remove this region from active region 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) @@ -1196,25 +1229,8 @@ 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_submit_region_inactive(hpb, rgn_i); } out: @@ -1249,14 +1265,32 @@ 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, - * it will let host reload its L2P entries(re-activate the region - * in the UFS device). + * For the HPB host control mode, in case device powered up and lost HPB + * information, we will set the region flag to be RGN_FLAG_UPDATE, it will + * let host reload its L2P entries(reactivate region in the UFS device). */ ufshpb_set_regions_update(hpb); + } else { + /* + * For the HPB device control mode, if host side receives 02h:HPB Operation + * in UPIU response, which means device recommends the host side should + * inactivate all active regions. Here 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_submit_region_inactive(hpb, rgn->rgn_idx); + + if (ufshpb_get_state(hpb) == HPB_PRESENT) + queue_work(ufshpb_wq, &hpb->map_work); + } } }