From patchwork Thu Mar 31 11:23:35 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 64771 Delivered-To: patch@linaro.org Received: by 10.112.199.169 with SMTP id jl9csp96291lbc; Thu, 31 Mar 2016 04:27:05 -0700 (PDT) X-Received: by 10.55.72.196 with SMTP id v187mr15422977qka.97.1459423600993; Thu, 31 Mar 2016 04:26:40 -0700 (PDT) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org. [192.237.175.120]) by mx.google.com with ESMTPS id e7si7334666qkb.94.2016.03.31.04.26.40 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 31 Mar 2016 04:26:40 -0700 (PDT) Received-SPF: neutral (google.com: 192.237.175.120 is neither permitted nor denied by best guess record for domain of xen-devel-bounces@lists.xen.org) client-ip=192.237.175.120; Authentication-Results: mx.google.com; spf=neutral (google.com: 192.237.175.120 is neither permitted nor denied by best guess record for domain of xen-devel-bounces@lists.xen.org) smtp.mailfrom=xen-devel-bounces@lists.xen.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1alaj3-0006wm-7t; Thu, 31 Mar 2016 11:25:21 +0000 Received: from mail6.bemta6.messagelabs.com ([85.158.143.247]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1alaj2-0006u8-28 for xen-devel@lists.xen.org; Thu, 31 Mar 2016 11:25:20 +0000 Received: from [85.158.143.35] by server-3.bemta-6.messagelabs.com id 29/5A-07120-F190DF65; Thu, 31 Mar 2016 11:25:19 +0000 X-Env-Sender: zhaoshenglong@huawei.com X-Msg-Ref: server-6.tower-21.messagelabs.com!1459423516!6786438!1 X-Originating-IP: [119.145.14.65] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMTE5LjE0NS4xNC42NSA9PiA3NzQ2Mw==\n X-StarScan-Received: X-StarScan-Version: 8.11; banners=-,-,- X-VirusChecked: Checked Received: (qmail 38827 invoked from network); 31 Mar 2016 11:25:18 -0000 Received: from szxga02-in.huawei.com (HELO szxga02-in.huawei.com) (119.145.14.65) by server-6.tower-21.messagelabs.com with RC4-SHA encrypted SMTP; 31 Mar 2016 11:25:18 -0000 Received: from 172.24.1.60 (EHLO szxeml428-hub.china.huawei.com) ([172.24.1.60]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DEL54448; Thu, 31 Mar 2016 19:25:08 +0800 (CST) Received: from HGHY1Z002260041.china.huawei.com (10.177.16.142) by szxeml428-hub.china.huawei.com (10.82.67.183) with Microsoft SMTP Server id 14.3.235.1; Thu, 31 Mar 2016 19:24:54 +0800 From: Shannon Zhao To: , , Date: Thu, 31 Mar 2016 19:23:35 +0800 Message-ID: <1459423425-1220-8-git-send-email-zhaoshenglong@huawei.com> X-Mailer: git-send-email 1.9.0.msysgit.0 In-Reply-To: <1459423425-1220-1-git-send-email-zhaoshenglong@huawei.com> References: <1459423425-1220-1-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=0001.0A0B0206.56FD0914.0211, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 7e6c23a89515a29f189cd60ae71acfc2 Cc: devicetree@vger.kernel.org, sstabellini@kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, xen-devel@lists.xen.org, julien.grall@arm.com, linux-efi@vger.kernel.org, shannon.zhao@linaro.org, peter.huangpeng@huawei.com Subject: [Xen-devel] [PATCH v9 07/17] Xen: ARM: Add support for mapping AMBA device mmio X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" From: Shannon Zhao Add a bus_notifier for AMBA bus device in order to map the device mmio regions when DOM0 booting with ACPI. Signed-off-by: Shannon Zhao Reviewed-by: Stefano Stabellini --- drivers/xen/arm-device.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/xen/arm-device.c b/drivers/xen/arm-device.c index 76e26e5..3854043 100644 --- a/drivers/xen/arm-device.c +++ b/drivers/xen/arm-device.c @@ -139,3 +139,46 @@ static int __init register_xen_platform_notifier(void) } arch_initcall(register_xen_platform_notifier); + +#ifdef CONFIG_ARM_AMBA +#include + +static int xen_amba_notifier(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct amba_device *adev = to_amba_device(data); + int r = 0; + + switch (action) { + case BUS_NOTIFY_ADD_DEVICE: + r = xen_map_device_mmio(&adev->res, 1); + break; + case BUS_NOTIFY_DEL_DEVICE: + r = xen_unmap_device_mmio(&adev->res, 1); + break; + default: + return NOTIFY_DONE; + } + if (r) + dev_err(&adev->dev, "AMBA: Failed to %s device %s MMIO!\n", + action == BUS_NOTIFY_ADD_DEVICE ? "map" : + (action == BUS_NOTIFY_DEL_DEVICE ? "unmap" : "?"), + adev->dev.init_name); + + return NOTIFY_OK; +} + +static struct notifier_block amba_device_nb = { + .notifier_call = xen_amba_notifier, +}; + +static int __init register_xen_amba_notifier(void) +{ + if (!xen_initial_domain() || acpi_disabled) + return 0; + + return bus_register_notifier(&amba_bustype, &amba_device_nb); +} + +arch_initcall(register_xen_amba_notifier); +#endif