From nobody Wed Sep 17 10:38:33 2025 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 77E31C4167B for ; Thu, 22 Dec 2022 14:15:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235716AbiLVOO7 (ORCPT ); Thu, 22 Dec 2022 09:14:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235552AbiLVOOS (ORCPT ); Thu, 22 Dec 2022 09:14:18 -0500 Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81DE130F5A for ; Thu, 22 Dec 2022 06:12:32 -0800 (PST) Received: by mail-pj1-x102a.google.com with SMTP id x3so2011906pjv.4 for ; Thu, 22 Dec 2022 06:12:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=UnBUp5WyCz4krAwRvhsnV8wS00kgXpu7vT2PwLsChp8=; b=YdGqbwN+gQqfHCFSWQmyIsywlKkBpIYcrXg3HvTHS9G+mtStS43WruoltROS/uEKmo 5O0zfwcO568bsfeWlPwgJFW0h5+Mevpep4gv/Z4Kd/4G9UwqYB6lGPf9ennfbbO/autt PEFZKjtsvw0sxM5kGviTs1A+k5IR27ckqFWJFoUvTVjANNuoacVT/cHWjAImL+I3Jwxk Gi43pb99ZJveG9SKVWrUxZ3GttulbqQJz2lhDE0sxWzxsV3mXop09VXI3g2Irs0LhP+Z hywLxlVT/J+vhftxL+uOTDwUl/1ORzp+G6AFRdghV/4n8ZOwmFmKY/j8Wi5PAOmrKWi3 GToQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UnBUp5WyCz4krAwRvhsnV8wS00kgXpu7vT2PwLsChp8=; b=Ne1kqfc5CRrbtfCfr/KtSRhrKMsRC4myA+E5Harm4YedUCaT2wyNa0G8XAVTYBvC6r /cFuwqvbuGDASf5wgQ0/0oclMnZy9wDND8B2oRSSHVcyXsmlE/sl8CcOB7GvlKy5u2PN eyd0oQxnArzwkhGLb8xPaGiTM3tHlidpRN8qw7/ni6wmKIavsHmgvRw6bKpHyYgFNRgI tzLL9MHWFzibUcHSdMjov7RV2kTx5ueLtv4BiW4M9VpivHnD/+tTtXx9m4sFlRXX3EHp vPOxBFTfv9/TSFNgGYLmi9vG57McXSOv1RbbIDIcFHrGai79TmJNzzI3YBFptQoPaYkj afKw== X-Gm-Message-State: AFqh2kr15VRhzzuWxpwY9mC6gN/KxwCRqe9TjOcI7oFK5cEmIMrgu2yy 7j6MtB/o+/gW15tIEX8YMbRyay5kZ+BuILs= X-Google-Smtp-Source: AMrXdXvxNWJ3I9wCdsRq+WWRItGU4LaRqqcv3b3NKRJwUI3B0oHtW7J9RE43Xlo2gfcOsBjbHh4h5Q== X-Received: by 2002:a05:6a20:a884:b0:af:9fa8:ce05 with SMTP id ca4-20020a056a20a88400b000af9fa8ce05mr6825267pzb.2.1671718351929; Thu, 22 Dec 2022 06:12:31 -0800 (PST) Received: from localhost.localdomain ([117.217.177.177]) by smtp.gmail.com with ESMTPSA id f8-20020a655908000000b0047829d1b8eesm832031pgu.31.2022.12.22.06.12.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Dec 2022 06:12:31 -0800 (PST) From: Manivannan Sadhasivam To: martin.petersen@oracle.com, jejb@linux.ibm.com, andersson@kernel.org, vkoul@kernel.org Cc: quic_cang@quicinc.com, quic_asutoshd@quicinc.com, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, linux-scsi@vger.kernel.org, dmitry.baryshkov@linaro.org, ahalaney@redhat.com, abel.vesa@linaro.org, alim.akhtar@samsung.com, avri.altman@wdc.com, bvanassche@acm.org, Manivannan Sadhasivam Subject: [PATCH v5 19/23] scsi: ufs: core: Add support for reinitializing the UFS device Date: Thu, 22 Dec 2022 19:39:57 +0530 Message-Id: <20221222141001.54849-20-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221222141001.54849-1-manivannan.sadhasivam@linaro.org> References: <20221222141001.54849-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Some platforms like Qcom, requires the UFS device to be reinitialized after switching to maximum gear speed. So add support for that in UFS core by introducing a new quirk (UFSHCD_CAP_REINIT_AFTER_MAX_GEAR_SWITCH) and doing the reinitialization, if the quirk is enabled by the controller driver. Suggested-by: Can Guo Tested-by: Andrew Halaney # Qdrive3/sa8540p-ride Signed-off-by: Manivannan Sadhasivam Reviewed-by: Bart Van Assche --- drivers/ufs/core/ufshcd.c | 63 +++++++++++++++++++++++++++++---------- include/ufs/ufshcd.h | 6 ++++ 2 files changed, 53 insertions(+), 16 deletions(-) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index bda61be5f035..fe4720bf0d67 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -8161,27 +8161,18 @@ static int ufshcd_add_lus(struct ufs_hba *hba) return ret; } =20 -/** - * ufshcd_probe_hba - probe hba to detect device and initialize it - * @hba: per-adapter instance - * @init_dev_params: whether or not to call ufshcd_device_params_init(). - * - * Execute link-startup and verify device initialization - */ -static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params) +static int ufshcd_device_init(struct ufs_hba *hba, bool init_dev_params) { int ret; - unsigned long flags; - ktime_t start =3D ktime_get(); =20 hba->ufshcd_state =3D UFSHCD_STATE_RESET; =20 ret =3D ufshcd_link_startup(hba); if (ret) - goto out; + return ret; =20 if (hba->quirks & UFSHCD_QUIRK_SKIP_PH_CONFIGURATION) - goto out; + return ret; =20 /* Debug counters initialization */ ufshcd_clear_dbg_ufs_stats(hba); @@ -8192,12 +8183,12 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bo= ol init_dev_params) /* Verify device initialization by sending NOP OUT UPIU */ ret =3D ufshcd_verify_dev_init(hba); if (ret) - goto out; + return ret; =20 /* Initiate UFS initialization, and waiting until completion */ ret =3D ufshcd_complete_dev_init(hba); if (ret) - goto out; + return ret; =20 /* * Initialize UFS device parameters used by driver, these @@ -8206,7 +8197,7 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool= init_dev_params) if (init_dev_params) { ret =3D ufshcd_device_params_init(hba); if (ret) - goto out; + return ret; } =20 ufshcd_tune_unipro_params(hba); @@ -8227,11 +8218,51 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bo= ol init_dev_params) if (ret) { dev_err(hba->dev, "%s: Failed setting power mode, err =3D %d\n", __func__, ret); + return ret; + } + } + + return 0; +} + +/** + * ufshcd_probe_hba - probe hba to detect device and initialize it + * @hba: per-adapter instance + * @init_dev_params: whether or not to call ufshcd_device_params_init(). + * + * Execute link-startup and verify device initialization + */ +static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params) +{ + ktime_t start =3D ktime_get(); + unsigned long flags; + int ret; + + ret =3D ufshcd_device_init(hba, init_dev_params); + if (ret) + goto out; + + if (hba->quirks & UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH) { + /* Reset the device and controller before doing reinit */ + ufshcd_device_reset(hba); + ufshcd_hba_stop(hba); + ufshcd_vops_reinit_notify(hba); + ret =3D ufshcd_hba_enable(hba); + if (ret) { + dev_err(hba->dev, "Host controller enable failed\n"); + ufshcd_print_evt_hist(hba); + ufshcd_print_host_state(hba); goto out; } - ufshcd_print_pwr_info(hba); + + /* Reinit the device */ + ret =3D ufshcd_device_init(hba, init_dev_params); + if (ret) + goto out; } =20 + ufshcd_print_pwr_info(hba); + /* * bActiveICCLevel is volatile for UFS device (as per latest v2.1 spec) * and for removable UFS card as well, hence always set the parameter. diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index 0a0b435f5c17..68bd822b9c22 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -595,6 +595,12 @@ enum ufshcd_quirks { * auto-hibernate capability but it's FASTAUTO only. */ UFSHCD_QUIRK_HIBERN_FASTAUTO =3D 1 << 18, + + /* + * This quirk needs to be enabled if the host controller needs + * to reinit the device after switching to maximum gear. + */ + UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH =3D 1 << 19, }; =20 enum ufshcd_caps { --=20 2.25.1