From nobody Wed Apr 15 00:39:25 2026 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 53506C04A68 for ; Thu, 28 Jul 2022 17:32:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232600AbiG1RcG (ORCPT ); Thu, 28 Jul 2022 13:32:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229447AbiG1RcE (ORCPT ); Thu, 28 Jul 2022 13:32:04 -0400 Received: from alexa-out-sd-02.qualcomm.com (alexa-out-sd-02.qualcomm.com [199.106.114.39]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B99E66FA1D; Thu, 28 Jul 2022 10:32:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1659029523; x=1690565523; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=YQvYcqlg0bldJyhOidSW8usnpHXc8Hrf8nik6LWDg4M=; b=Eomk54XIq6SiipPeR4wfLwuo8MEguJlYnWne+uTaXIuF9ehj1LYijQdN 3/7k9ZSwgElt4iyNQPYcTa9zFFKVPNfZANLio30hWleRq9O8G5FbGPugs Mq7aNwzTvc3vZFH7uxKr8JBOZgFcaMfnr5JjlxHUHND0h0WbNIMEqRm4t 8=; Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by alexa-out-sd-02.qualcomm.com with ESMTP; 28 Jul 2022 10:32:03 -0700 X-QCInternal: smtphost Received: from unknown (HELO nasanex01a.na.qualcomm.com) ([10.52.223.231]) by ironmsg04-sd.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Jul 2022 10:32:03 -0700 Received: from hu-cchinnad-hyd.qualcomm.com (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Thu, 28 Jul 2022 10:32:01 -0700 From: Chetan C R To: CC: , , , Chetan C R Subject: [PATCH V2] scsi: ufs: Get boot device storage type from command line Date: Thu, 28 Jul 2022 23:00:42 +0530 Message-ID: <1659029442-19135-2-git-send-email-quic_cchinnad@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1659029442-19135-1-git-send-email-quic_cchinnad@quicinc.com> References: <1659029442-19135-1-git-send-email-quic_cchinnad@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01a.na.qualcomm.com (10.52.223.231) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Get the boot device storage type by reading it from kernel command line arguments and export the same information to ufs modules. Signed-off-by: Chetan C R --- drivers/ufs/host/Kconfig | 10 ++++++++ drivers/ufs/host/Makefile | 1 + drivers/ufs/host/ufs-cmdline.c | 54 ++++++++++++++++++++++++++++++++++++++= ++++ 3 files changed, 65 insertions(+) create mode 100644 drivers/ufs/host/ufs-cmdline.c diff --git a/drivers/ufs/host/Kconfig b/drivers/ufs/host/Kconfig index 8259022..02fe817 100644 --- a/drivers/ufs/host/Kconfig +++ b/drivers/ufs/host/Kconfig @@ -68,6 +68,16 @@ config SCSI_UFS_QCOM Select this if you have UFS controller on QCOM chipset. If unsure, say N. =20 +config UFS_QCOM_CMDLINE + bool "Get the boot device type from kernel command line for Qcom devices" + default y if ARCH_QCOM + help + This selects the support of getting the boot device storage type + from kernel command line arguments and export this information + to the Qcom UFS controller platform driver. + + If unsure, say N. + config SCSI_UFS_MEDIATEK tristate "Mediatek specific hooks to UFS controller platform driver" depends on SCSI_UFSHCD_PLATFORM && ARCH_MEDIATEK diff --git a/drivers/ufs/host/Makefile b/drivers/ufs/host/Makefile index e4be542..a9463f1 100644 --- a/drivers/ufs/host/Makefile +++ b/drivers/ufs/host/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_SCSI_UFS_CDNS_PLATFORM) +=3D cdns-pltfrm.o obj-$(CONFIG_SCSI_UFS_QCOM) +=3D ufs_qcom.o ufs_qcom-y +=3D ufs-qcom.o ufs_qcom-$(CONFIG_SCSI_UFS_CRYPTO) +=3D ufs-qcom-ice.o +obj-$(CONFIG_UFS_QCOM_CMDLINE) +=3D ufs-cmdline.o obj-$(CONFIG_SCSI_UFS_EXYNOS) +=3D ufs-exynos.o obj-$(CONFIG_SCSI_UFSHCD_PCI) +=3D ufshcd-pci.o obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) +=3D ufshcd-pltfrm.o diff --git a/drivers/ufs/host/ufs-cmdline.c b/drivers/ufs/host/ufs-cmdline.c new file mode 100644 index 0000000..408755c --- /dev/null +++ b/drivers/ufs/host/ufs-cmdline.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2022, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include + +#ifdef CONFIG_BOOT_CONFIG +#include +#endif + +#define ANDROID_BOOT_DEV_MAX_V3 30 + +static char android_boot_dev_v3[ANDROID_BOOT_DEV_MAX_V3]; +static const char *android_boot_dev_v4; + +const char *get_storage_boot_device(void) +{ + if (android_boot_dev_v4 && strlen(android_boot_dev_v4)) + return android_boot_dev_v4; + + else if (strlen(android_boot_dev_v3)) + return android_boot_dev_v3; + + pr_err("Not able to get Bootconfig or Kernel command line param\n"); + return NULL; +}; +EXPORT_SYMBOL_GPL(get_storage_boot_device); + +/* boot image header version 3 android boot device type */ +static int __init get_android_boot_dev_v3(char *str) +{ + strscpy(android_boot_dev_v3, str, ANDROID_BOOT_DEV_MAX_V3); + return 1; +} +__setup("androidboot.bootdevice=3D", get_android_boot_dev_v3); + +#ifdef CONFIG_BOOT_CONFIG +/* boot image header version 4 android boot device type */ +static int __init get_android_boot_dev_v4(void) +{ + struct xbc_node *vnode =3D NULL; + + android_boot_dev_v4 =3D xbc_find_value("androidboot.bootdevice", &vnode); + + if (vnode && xbc_node_is_array(vnode)) + xbc_array_for_each_value(vnode, android_boot_dev_v4); + + return 0; +} +fs_initcall(get_android_boot_dev_v4); +#endif --=20 2.7.4