From patchwork Mon May 13 14:36:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 10941021 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A0A036C5 for ; Mon, 13 May 2019 14:36:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8D2F32817F for ; Mon, 13 May 2019 14:36:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7C7812832D; Mon, 13 May 2019 14:36:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2297D2817F for ; Mon, 13 May 2019 14:36:52 +0000 (UTC) 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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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=TQ5Yc2kuKKQneuQRCXw70o23ptO7FmyD/AX9cuffwKw=; b=UcJAfIfCnBsn6+ Od/xLls78elKezVyOPpA2eBVEY3DEC2Zk5EqzupU3MfuOyaGavTgivaMfCeaidRfxzYpLnO5p+tgC DcuJYVC4CF6bjqrcYFaz7Tu4fdNKHId5/6BhMqnzOQL1xCGjU593hqKM5tRhA1Avg+WCwkYnoOZqi Y6fuy5PD03qd4aaoVnHFu8C3C4gK1dD5TCHdnXMnWfXlF5eH58p29U1knHrLnKLObh25zgD1XshdY emAIEReKqMco9g0RHh9XSeNGaEXwRxyfnDDfNedoQc9cE+5cAjCB9g50LQkjzY2bxOjTP/QsCzrmu KAL2NaRdMZWfM2fLTj7w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hQC4N-0003rK-8q; Mon, 13 May 2019 14:36:47 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hQC4F-0003jG-Ad; Mon, 13 May 2019 14:36:40 +0000 X-UUID: ad514dde0fdb4aa0b65585b5d2a7fdcb-20190513 X-UUID: ad514dde0fdb4aa0b65585b5d2a7fdcb-20190513 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 250458146; Mon, 13 May 2019 06:36:34 -0800 Received: from MTKMBS01N1.mediatek.inc (172.21.101.68) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 13 May 2019 07:36:33 -0700 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 13 May 2019 22:36:31 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 13 May 2019 22:36:32 +0800 From: Stanley Chu To: , , , , Subject: [PATCH v1 2/3] scsi: ufs: add error handling of auto-hibern8 Date: Mon, 13 May 2019 22:36:25 +0800 Message-ID: <1557758186-18706-3-git-send-email-stanley.chu@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1557758186-18706-1-git-send-email-stanley.chu@mediatek.com> References: <1557758186-18706-1-git-send-email-stanley.chu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190513_073639_379433_CFBC3205 X-CRM114-Status: UNSURE ( 9.12 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: marc.w.gonzalez@free.fr, andy.teng@mediatek.com, chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com, evgreen@chromium.org, subhashj@codeaurora.org, linux-mediatek@lists.infradead.org, peter.wang@mediatek.com, vivek.gautam@codeaurora.org, matthias.bgg@gmail.com, sayalil@codeaurora.org, Stanley Chu , linux-arm-kernel@lists.infradead.org, beanhuo@micron.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Currently auto-hibern8 is activated if host supports auto-hibern8 capability. However no error handlings are existed thus this feature is kind of risky. If "Hibernate Enter" or "Hibernate Exit" fail happens during auto-hibern8 flow, the corresponding interrupt "UIC_HIBERNATE_ENTER" or "UIC_HIBERNATE_EXIT" shall be raised according to UFS specification. This patch adds auto-hibern8 error handlings: - Monitor "Hibernate Enter" and "Hibernate Exit" interrupts after auto-hibern8 feature is activated. - If fail happens, trigger error handlings just like "manual-hibernate" fail and use the same flow: Identify errors and schedule UFS error handler in ufshcd_check_errors(), and then do host reset and restore in UFS error handler. Signed-off-by: Stanley Chu --- drivers/scsi/ufs/ufshcd.c | 14 ++++++++++++++ drivers/scsi/ufs/ufshcd.h | 13 +++++++++++++ drivers/scsi/ufs/ufshci.h | 3 +++ 3 files changed, 30 insertions(+) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 1665820c22fd..e0e3930abc19 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -5254,6 +5254,7 @@ static void ufshcd_err_handler(struct work_struct *work) goto skip_err_handling; } if ((hba->saved_err & INT_FATAL_ERRORS) || + ufshcd_is_auto_hibern8_error(hba, hba->saved_err) || ((hba->saved_err & UIC_ERROR) && (hba->saved_uic_err & (UFSHCD_UIC_DL_PA_INIT_ERROR | UFSHCD_UIC_DL_NAC_RECEIVED_ERROR | @@ -5431,6 +5432,15 @@ static void ufshcd_check_errors(struct ufs_hba *hba) queue_eh_work = true; } + if (ufshcd_is_auto_hibern8_error(hba, hba->errors)) { + dev_err(hba->dev, + "%s: Auto Hibern8 %s failed - status: 0x%08x, upmcrs: 0x%08x\n", + __func__, (hba->errors & UIC_HIBERNATE_ENTER) ? + "Enter" : "Exit", + hba->errors, ufshcd_get_upmcrs(hba)); + queue_eh_work = true; + } + if (queue_eh_work) { /* * update the transfer error masks to sticky bits, let's do this @@ -5493,6 +5503,10 @@ static void ufshcd_tmc_handler(struct ufs_hba *hba) static void ufshcd_sl_intr(struct ufs_hba *hba, u32 intr_status) { hba->errors = UFSHCD_ERROR_MASK & intr_status; + + if (ufshcd_is_auto_hibern8_error(hba, intr_status)) + hba->errors |= (UFSHCD_UIC_AH8_ERROR_MASK & intr_status); + if (hba->errors) ufshcd_check_errors(hba); diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index ecfa898b9ccc..1bd9c8b61ed2 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -740,6 +740,19 @@ return true; #endif } +static inline bool ufshcd_is_auto_hibern8_supported(struct ufs_hba *hba) +{ + return (hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT); +} + +static inline bool ufshcd_is_auto_hibern8_error(struct ufs_hba *hba, + u32 intr_mask) +{ + return (ufshcd_is_auto_hibern8_supported(hba) && + !hba->uic_async_done && + (intr_mask & UFSHCD_UIC_AH8_ERROR_MASK)); +} + #define ufshcd_writel(hba, val, reg) \ writel((val), (hba)->mmio_base + (reg)) #define ufshcd_readl(hba, reg) \ diff --git a/drivers/scsi/ufs/ufshci.h b/drivers/scsi/ufs/ufshci.h index 6fa889de5ee5..4bcb205f2077 100644 --- a/drivers/scsi/ufs/ufshci.h +++ b/drivers/scsi/ufs/ufshci.h @@ -148,6 +148,9 @@ enum { UIC_HIBERNATE_EXIT |\ UIC_POWER_MODE) +#define UFSHCD_UIC_AH8_ERROR_MASK (UIC_HIBERNATE_ENTER |\ + UIC_HIBERNATE_EXIT) + #define UFSHCD_UIC_MASK (UIC_COMMAND_COMPL | UFSHCD_UIC_PWR_MASK) #define UFSHCD_ERROR_MASK (UIC_ERROR |\