From patchwork Thu Apr 7 12:03:24 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 65305 Delivered-To: patch@linaro.org Received: by 10.112.43.237 with SMTP id z13csp34517lbl; Thu, 7 Apr 2016 05:06:45 -0700 (PDT) X-Received: by 10.67.7.37 with SMTP id cz5mr4394496pad.18.1460030805401; Thu, 07 Apr 2016 05:06:45 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id p28si510655pfi.167.2016.04.07.05.06.45; Thu, 07 Apr 2016 05:06:45 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756252AbcDGMGn (ORCPT + 29 others); Thu, 7 Apr 2016 08:06:43 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:25185 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755528AbcDGME3 (ORCPT ); Thu, 7 Apr 2016 08:04:29 -0400 Received: from 172.24.1.47 (EHLO SZXEML424-HUB.china.huawei.com) ([172.24.1.47]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DEU23415; Thu, 07 Apr 2016 20:04:19 +0800 (CST) Received: from HGHY1Z002260041.china.huawei.com (10.177.16.142) by SZXEML424-HUB.china.huawei.com (10.82.67.153) with Microsoft SMTP Server id 14.3.235.1; Thu, 7 Apr 2016 20:04:11 +0800 From: Shannon Zhao To: , CC: , , , , , , , , , Subject: [PATCH v11 07/17] Xen: ARM: Add support for mapping AMBA device mmio Date: Thu, 7 Apr 2016 20:03:24 +0800 Message-ID: <1460030614-16112-8-git-send-email-zhaoshenglong@huawei.com> X-Mailer: git-send-email 1.9.0.msysgit.0 In-Reply-To: <1460030614-16112-1-git-send-email-zhaoshenglong@huawei.com> References: <1460030614-16112-1-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=0001.0A020202.57064CC5.0309, 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: a8e2856ed40636c0ea85e56cae3c5af2 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Reviewed-by: Julien Grall --- drivers/xen/arm-device.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) -- 2.0.4 diff --git a/drivers/xen/arm-device.c b/drivers/xen/arm-device.c index b918e8e..778acf8 100644 --- a/drivers/xen/arm-device.c +++ b/drivers/xen/arm-device.c @@ -151,3 +151,46 @@ 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