From patchwork Sat Jan 23 09:20:03 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 8096371 Return-Path: X-Original-To: patchwork-xen-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CAAFA9F1CC for ; Sat, 23 Jan 2016 09:31:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E47C9205E8 for ; Sat, 23 Jan 2016 09:31:29 +0000 (UTC) Received: from lists.xen.org (lists.xenproject.org [50.57.142.19]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4AB5D205E4 for ; Sat, 23 Jan 2016 09:31:28 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aMuVX-0001YC-Tg; Sat, 23 Jan 2016 09:29:23 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aMuVW-0001Xs-Mg for xen-devel@lists.xen.org; Sat, 23 Jan 2016 09:29:22 +0000 Received: from [193.109.254.147] by server-11.bemta-14.messagelabs.com id 6B/75-28228-2F743A65; Sat, 23 Jan 2016 09:29:22 +0000 X-Env-Sender: zhaoshenglong@huawei.com X-Msg-Ref: server-6.tower-27.messagelabs.com!1453541352!18925113!1 X-Originating-IP: [119.145.14.66] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMTE5LjE0NS4xNC42NiA9PiA4NTI3\n X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 27182 invoked from network); 23 Jan 2016 09:29:20 -0000 Received: from szxga03-in.huawei.com (HELO szxga03-in.huawei.com) (119.145.14.66) by server-6.tower-27.messagelabs.com with RC4-SHA encrypted SMTP; 23 Jan 2016 09:29:20 -0000 Received: from 172.24.1.49 (EHLO szxeml427-hub.china.huawei.com) ([172.24.1.49]) by szxrg03-dlp.huawei.com (MOS 4.4.3-GA FastPath queued) with ESMTP id BVC82180; Sat, 23 Jan 2016 17:22:31 +0800 (CST) Received: from HGHY1Z002260041.china.huawei.com (10.177.16.142) by szxeml427-hub.china.huawei.com (10.82.67.182) with Microsoft SMTP Server id 14.3.235.1; Sat, 23 Jan 2016 17:22:19 +0800 From: Shannon Zhao To: Date: Sat, 23 Jan 2016 17:20:03 +0800 Message-ID: <1453540813-15764-12-git-send-email-zhaoshenglong@huawei.com> X-Mailer: git-send-email 1.9.0.msysgit.0 In-Reply-To: <1453540813-15764-1-git-send-email-zhaoshenglong@huawei.com> References: <1453540813-15764-1-git-send-email-zhaoshenglong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.177.16.142] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090203.56A34657.00AB, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 29f96c4dc68abee2a2c023df1c3df477 Cc: ian.campbell@citrix.com, stefano.stabellini@eu.citrix.com, peter.huangpeng@huawei.com, julien.grall@citrix.com, stefano.stabellini@citrix.com, shannon.zhao@linaro.org Subject: [Xen-devel] [PATCH v4 11/21] arm: Introduce a generic way to use a device from acpi X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Parth Dixit Add generic way to use device from acpi similar to the way it is supported in device tree. Signed-off-by: Parth Dixit Signed-off-by: Shannon Zhao Acked-by: Stefano Stabellini --- V4: drop __attribute__ --- xen/arch/arm/device.c | 18 ++++++++++++++++++ xen/arch/arm/xen.lds.S | 7 +++++++ xen/include/asm-arm/device.h | 30 ++++++++++++++++++++++++++++++ 3 files changed, 55 insertions(+) diff --git a/xen/arch/arm/device.c b/xen/arch/arm/device.c index 0b53f6a..a0072c1 100644 --- a/xen/arch/arm/device.c +++ b/xen/arch/arm/device.c @@ -22,6 +22,7 @@ #include extern const struct device_desc _sdevice[], _edevice[]; +extern const struct acpi_device_desc _asdevice[], _aedevice[]; int __init device_init(struct dt_device_node *dev, enum device_class class, const void *data) @@ -50,6 +51,23 @@ int __init device_init(struct dt_device_node *dev, enum device_class class, return -EBADF; } +int __init acpi_device_init(enum device_class class, const void *data, int class_type) +{ + const struct acpi_device_desc *desc; + + for ( desc = _asdevice; desc != _aedevice; desc++ ) + { + if ( ( desc->class != class ) || ( desc->class_type != class_type ) ) + continue; + + ASSERT(desc->init != NULL); + + return desc->init(data); + } + + return -EBADF; +} + enum device_class device_get_class(const struct dt_device_node *dev) { const struct device_desc *desc; diff --git a/xen/arch/arm/xen.lds.S b/xen/arch/arm/xen.lds.S index 0488f37..60802f6 100644 --- a/xen/arch/arm/xen.lds.S +++ b/xen/arch/arm/xen.lds.S @@ -100,6 +100,13 @@ SECTIONS _edevice = .; } :text + . = ALIGN(8); + .adev.info : { + _asdevice = .; + *(.adev.info) + _aedevice = .; + } :text + . = ALIGN(PAGE_SIZE); /* Init code and data */ __init_begin = .; .init.text : { diff --git a/xen/include/asm-arm/device.h b/xen/include/asm-arm/device.h index b455bdf..6734ae8 100644 --- a/xen/include/asm-arm/device.h +++ b/xen/include/asm-arm/device.h @@ -50,6 +50,27 @@ struct device_desc { int (*init)(struct dt_device_node *dev, const void *data); }; +struct acpi_device_desc { + /* Device name */ + const char *name; + /* Device class */ + enum device_class class; + /* type of device supported by the driver */ + const int class_type; + /* Device initialization */ + int (*init)(const void *data); +}; + +/** + * acpi_device_init - Initialize a device + * @class: class of the device (serial, network...) + * @data: specific data for initializing the device + * + * Return 0 on success. + */ +int __init acpi_device_init(enum device_class class, + const void *data, int class_type); + /** * device_init - Initialize a device * @dev: device to initialize @@ -78,6 +99,15 @@ __section(".dev.info") = { \ #define DT_DEVICE_END \ }; +#define ACPI_DEVICE_START(_name, _namestr, _class) \ +static const struct acpi_device_desc __dev_desc_##_name __used \ +__section(".adev.info") = { \ + .name = _namestr, \ + .class = _class, \ + +#define ACPI_DEVICE_END \ +}; + #endif /* __ASM_ARM_DEVICE_H */ /*