From patchwork Thu Feb 6 08:33:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Can Guo X-Patchwork-Id: 11367917 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 02CE192A for ; Thu, 6 Feb 2020 08:34:41 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CD90820720 for ; Thu, 6 Feb 2020 08:34:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="a+/JpKWg"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="S9lyGL5m" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CD90820720 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=xgJDSTg8OKbRDKv5vRcgF1zQ5Mzl30exJoRns5XOMkI=; b=a+/JpKWgl25uOXTJlz9wfdQ0bQ B50vlpcbvhXW0imHaAvOJ7+TJ4RPgcItf3XzxsK5We/0LDQztFPUmndauTuPa/HS7wUlqJ41Ntume K2puFAn/VrWW2G7wRyYHyDIeVPCviNI1xQuFvJQpFcA1rGUrMEJk9x1IzsGXW6r+zw2zbaXy8mMyn 8DNCPub+pp4WEAgzY1j57kEqXRWCRLku/h2HEcg+WD7PrMDyH5+1ZpLBrdSyf3AGx5uv9SEhj+rga B1F0bx2LAxkiJvqMIqVc8Br+pntdvsM57UosniRPIbrh1ChcS5yTa5ZODZzx4o3mW8l1jTLBA0Tdc aOOsGBjA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1izccO-0006NQ-DY; Thu, 06 Feb 2020 08:34:36 +0000 Received: from mail26.static.mailgun.info ([104.130.122.26]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1izcc0-0005ZH-Qk for linux-arm-kernel@lists.infradead.org; Thu, 06 Feb 2020 08:34:16 +0000 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1580978054; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=Lm8OPFjVWBsVgx/X+8V0fNBgHGT7pvVECpfc6EtHCvw=; b=S9lyGL5mpoHTQkrHNwMXePPiLNXH5/lZ2hH33QaFmlZl+BkHCMpXGPB2C5xdMx3zhmDPGUb6 e180iQC/eo/bhLtQbwjJXqvumB1rCuCCY2hjeMTQFHYEsu3yaguC170/U2sGdCRzceerLJ8+ /uIYmSrbwyxp0iMS8F0GO+S8LzE= X-Mailgun-Sending-Ip: 104.130.122.26 X-Mailgun-Sid: WyJiYzAxZiIsICJsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmciLCAiYmU5ZTRhIl0= Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e3bcf82.7fb6c1b7f538-smtp-out-n03; Thu, 06 Feb 2020 08:34:10 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id C71EBC447AC; Thu, 6 Feb 2020 08:34:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from pacamara-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: cang) by smtp.codeaurora.org (Postfix) with ESMTPSA id 25BBFC447A2; Thu, 6 Feb 2020 08:34:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 25BBFC447A2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=cang@codeaurora.org From: Can Guo To: asutoshd@codeaurora.org, nguyenb@codeaurora.org, hongwus@codeaurora.org, rnayak@codeaurora.org, linux-scsi@vger.kernel.org, kernel-team@android.com, saravanak@google.com, salyzyn@google.com, cang@codeaurora.org Subject: [PATCH v7 6/8] scsi: ufs: Add dev ref clock gating wait time support Date: Thu, 6 Feb 2020 00:33:25 -0800 Message-Id: <1580978008-9327-7-git-send-email-cang@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1580978008-9327-1-git-send-email-cang@codeaurora.org> References: <1580978008-9327-1-git-send-email-cang@codeaurora.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200206_003414_317038_1C0496B1 X-CRM114-Status: GOOD ( 16.46 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [104.130.122.26 listed in wl.mailspike.net] -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [104.130.122.26 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bart Van Assche , "Martin K. Petersen" , Venkat Gopalakrishnan , "James E.J. Bottomley" , open list , Avri Altman , "moderated list:ARM/Mediatek SoC support" , Alim Akhtar , Matthias Brugger , Colin Ian King , Tomas Winkler , Stanley Chu , "moderated list:ARM/Mediatek SoC support" , Bean Huo MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org In UFS version 3.0, a newly added attribute bRefClkGatingWaitTime defines the minimum time for which the reference clock is required by device during transition to LS-MODE or HIBERN8 state. Make this change to reflect the new requirement by adding delays before turning off the clock. Signed-off-by: Can Guo Reviewed-by: Asutosh Das Reviewed-by: Bean Huo Reviewed-by: Stanley Chu --- drivers/scsi/ufs/ufs.h | 3 +++ drivers/scsi/ufs/ufshcd.c | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h index cfe3803..990cb48 100644 --- a/drivers/scsi/ufs/ufs.h +++ b/drivers/scsi/ufs/ufs.h @@ -167,6 +167,7 @@ enum attr_idn { QUERY_ATTR_IDN_FFU_STATUS = 0x14, QUERY_ATTR_IDN_PSA_STATE = 0x15, QUERY_ATTR_IDN_PSA_DATA_SIZE = 0x16, + QUERY_ATTR_IDN_REF_CLK_GATING_WAIT_TIME = 0x17, }; /* Descriptor idn for Query requests */ @@ -534,6 +535,8 @@ struct ufs_dev_info { u16 wmanufacturerid; /*UFS device Product Name */ u8 *model; + u16 wspecversion; + u32 clk_gating_wait_us; }; /** diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index e8f7f9d..20fa509 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -91,6 +91,9 @@ /* default delay of autosuspend: 2000 ms */ #define RPM_AUTOSUSPEND_DELAY_MS 2000 +/* Default value of wait time before gating device ref clock */ +#define UFSHCD_REF_CLK_GATING_WAIT_US 0xFF /* microsecs */ + #define ufshcd_toggle_vreg(_dev, _vreg, _on) \ ({ \ int _ret; \ @@ -3281,6 +3284,31 @@ static inline int ufshcd_read_unit_desc_param(struct ufs_hba *hba, param_offset, param_read_buf, param_size); } +static int ufshcd_get_ref_clk_gating_wait(struct ufs_hba *hba) +{ + int err = 0; + u32 gating_wait = UFSHCD_REF_CLK_GATING_WAIT_US; + + if (hba->dev_info.wspecversion >= 0x300) { + err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR, + QUERY_ATTR_IDN_REF_CLK_GATING_WAIT_TIME, 0, 0, + &gating_wait); + if (err) + dev_err(hba->dev, "Failed reading bRefClkGatingWait. err = %d, use default %uus\n", + err, gating_wait); + + if (gating_wait == 0) { + gating_wait = UFSHCD_REF_CLK_GATING_WAIT_US; + dev_err(hba->dev, "Undefined ref clk gating wait time, use default %uus\n", + gating_wait); + } + } + + hba->dev_info.clk_gating_wait_us = gating_wait; + + return err; +} + /** * ufshcd_memory_alloc - allocate memory for host memory space data structures * @hba: per adapter instance @@ -6626,6 +6654,10 @@ static int ufs_get_device_desc(struct ufs_hba *hba) dev_info->wmanufacturerid = desc_buf[DEVICE_DESC_PARAM_MANF_ID] << 8 | desc_buf[DEVICE_DESC_PARAM_MANF_ID + 1]; + /* getting Specification Version in big endian format */ + dev_info->wspecversion = desc_buf[DEVICE_DESC_PARAM_SPEC_VER] << 8 | + desc_buf[DEVICE_DESC_PARAM_SPEC_VER + 1]; + model_index = desc_buf[DEVICE_DESC_PARAM_PRDCT_NAME]; err = ufshcd_read_string_desc(hba, model_index, &dev_info->model, SD_ASCII_STD); @@ -7003,6 +7035,8 @@ static int ufshcd_device_params_init(struct ufs_hba *hba) goto out; } + ufshcd_get_ref_clk_gating_wait(hba); + ufs_fixup_device_setup(hba); if (!ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_READ_FLAG,