From patchwork Tue May 21 06:44:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 10952987 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 457FD16C1 for ; Tue, 21 May 2019 06:45:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 330AB28770 for ; Tue, 21 May 2019 06:45:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2714E2891F; Tue, 21 May 2019 06:45:50 +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 C086228770 for ; Tue, 21 May 2019 06:45:49 +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=atEJWeXafBKzXKHD9YbhlC2A/gxCyZbSBxRCB+tGA74=; b=Z43nOR/v4ZMRrg KNpk5W6J9aBJv6h+VimBybdiir/nOflG4CaJEkCb4d4l96TJjPs8K6hCbLIUXkGfdCPFdOBq3dohj 8IdiVzJ0DxUrLoKGiGC6uUZfj9XO0DJ5bELjXt28f0iGIrN2i4g1GRlKbK6UaCGqtRHVTngIpb/Vb 1CWiTZv9fP2vM679u70uJKzpdk4cdtS15ixVB6CbZdryZG4mv5QUDc20VbtvHK/OllGo58LlIeFmb gLLneRPmETKQLjHVLhM96taj6xNCD2S2QTXZJhsSCHc/kTdXKgd7D6be5f9RJAuaVG7Ibkx7t4sRi HzHbIT1ie7BOufuIb6fg==; 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 1hSyWt-0000tR-6v; Tue, 21 May 2019 06:45:43 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hSyWi-0000jM-LW; Tue, 21 May 2019 06:45:34 +0000 X-UUID: 56a337ad85734016ab64e70540d5b894-20190520 X-UUID: 56a337ad85734016ab64e70540d5b894-20190520 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 608991245; Mon, 20 May 2019 22:45:08 -0800 Received: from mtkmbs03n2.mediatek.inc (172.21.101.182) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 20 May 2019 23:45:07 -0700 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs03n2.mediatek.inc (172.21.101.182) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 21 May 2019 14:45:05 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 21 May 2019 14:45:05 +0800 From: Stanley Chu To: , , , , Subject: [PATCH v5 3/3] scsi: ufs: Add error-handling of Auto-Hibernate Date: Tue, 21 May 2019 14:44:54 +0800 Message-ID: <1558421094-3182-4-git-send-email-stanley.chu@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1558421094-3182-1-git-send-email-stanley.chu@mediatek.com> References: <1558421094-3182-1-git-send-email-stanley.chu@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: CC202388F3AF10FB555D675A1FD7A2E45BD37801BC1DE1582DC149E9463583BC2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190520_234532_705644_1D4952B4 X-CRM114-Status: GOOD ( 11.07 ) 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, linux-mediatek@lists.infradead.org, peter.wang@mediatek.com, matthias.bgg@gmail.com, 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-hibernate is activated if host supports auto-hibern8 capability. However error-handling is not implemented, which makes the feature somewhat risky. If either "Hibernate Enter" or "Hibernate Exit" fail during auto-hibernate flow, the corresponding interrupt "UIC_HIBERNATE_ENTER" or "UIC_HIBERNATE_EXIT" shall be raised according to UFS specification. This patch adds auto-hibernate error-handling: - Monitor "Hibernate Enter" and "Hibernate Exit" interrupts after auto-hibernate feature is activated. - If fail happens, trigger error-handling just like "manual-hibernate" fail and apply the same recovery flow: schedule UFS error handler in ufshcd_check_errors(), and then do host reset and restore in UFS error handler. Signed-off-by: Stanley Chu Reviewed-by: Bean Huo Reviewed-by: Alim Akhtar --- drivers/scsi/ufs/ufshcd.c | 31 +++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufshci.h | 6 ++++-- 2 files changed, 35 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 7cd757558203..a208589426b1 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) || + (hba->saved_err & UFSHCD_UIC_HIBERN8_MASK) || ((hba->saved_err & UIC_ERROR) && (hba->saved_uic_err & (UFSHCD_UIC_DL_PA_INIT_ERROR | UFSHCD_UIC_DL_NAC_RECEIVED_ERROR | @@ -5413,6 +5414,23 @@ static void ufshcd_update_uic_error(struct ufs_hba *hba) __func__, hba->uic_error); } +static bool ufshcd_is_auto_hibern8_error(struct ufs_hba *hba, + u32 intr_mask) +{ + if (!ufshcd_is_auto_hibern8_supported(hba)) + return false; + + if (!(intr_mask & UFSHCD_UIC_HIBERN8_MASK)) + return false; + + if (hba->active_uic_cmd && + (hba->active_uic_cmd->command == UIC_CMD_DME_HIBER_ENTER || + hba->active_uic_cmd->command == UIC_CMD_DME_HIBER_EXIT)) + return false; + + return true; +} + /** * ufshcd_check_errors - Check for errors that need s/w attention * @hba: per-adapter instance @@ -5431,6 +5449,15 @@ static void ufshcd_check_errors(struct ufs_hba *hba) queue_eh_work = true; } + if (hba->errors & UFSHCD_UIC_HIBERN8_MASK) { + 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 +5520,10 @@ 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_HIBERN8_MASK & intr_status); + if (hba->errors) ufshcd_check_errors(hba); diff --git a/drivers/scsi/ufs/ufshci.h b/drivers/scsi/ufs/ufshci.h index 6fa889de5ee5..dbb75cd28dc8 100644 --- a/drivers/scsi/ufs/ufshci.h +++ b/drivers/scsi/ufs/ufshci.h @@ -144,8 +144,10 @@ enum { #define CONTROLLER_FATAL_ERROR 0x10000 #define SYSTEM_BUS_FATAL_ERROR 0x20000 -#define UFSHCD_UIC_PWR_MASK (UIC_HIBERNATE_ENTER |\ - UIC_HIBERNATE_EXIT |\ +#define UFSHCD_UIC_HIBERN8_MASK (UIC_HIBERNATE_ENTER |\ + UIC_HIBERNATE_EXIT) + +#define UFSHCD_UIC_PWR_MASK (UFSHCD_UIC_HIBERN8_MASK |\ UIC_POWER_MODE) #define UFSHCD_UIC_MASK (UIC_COMMAND_COMPL | UFSHCD_UIC_PWR_MASK)