From patchwork Thu Mar 31 11:23:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 8711261 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 A1FEF9F39A for ; Thu, 31 Mar 2016 11:27:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 61A3F2026C for ; Thu, 31 Mar 2016 11:27:17 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 550C820259 for ; Thu, 31 Mar 2016 11:27:16 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1alaiz-0006pb-4n; Thu, 31 Mar 2016 11:25:17 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1alaiy-0006oc-EJ for xen-devel@lists.xen.org; Thu, 31 Mar 2016 11:25:16 +0000 Received: from [193.109.254.147] by server-13.bemta-14.messagelabs.com id 02/BB-02874-B190DF65; Thu, 31 Mar 2016 11:25:15 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrPIsWRWlGSWpSXmKPExsVSPpHPSVea82+ Ywd6zPBZLPi5mcWD0OLr7N1MAYxRrZl5SfkUCa8bCaduZC66qVpw5OJW1gfGMfBcjF4eQwClG iVML37FCOHsYJTpXdrJ3MXJysAnoSnzcOAXMFhHIk/jeOIsNpIhZYCuTxPv+CWAJYYEAiRdLn oLZLAKqEpd2PgGaxMHBK+Ausfp3MUhYQkBDYmXvBBYQm1PAQ2JP4wpWEFsIqOT56tfMIDavgK DEyZlPwGqYBSQkDr54wQzRqyjRtv4kG4QtKXFwxQ0WkBskQK5etv0LVMJU4uakGYwTGAVnIZk 1C8msBYxMqxjVi1OLylKLdE30kooy0zNKchMzc3QNDU30clOLixPTU3MSk4r1kvNzNzECA5QB CHYwrljofIhRkoNJSZT33us/YUJ8SfkplRmJxRnxRaU5qcWHGDU4OAR616y+wCjFkpefl6okw SvP8TdMSLAoNT21Ii0zBxhDMKUSHDxKIryMIGne4oLE3OLMdIjUKUZdjmNzb6xlEgKbISXOu5 cdqEgApCijNA9uBCyeLzHKSgnzMgIdKMRTkFqUm1mCKv+KUZyDUUmY9zbIFJ7MvBK4Ta+AjmA COmKrxi+QI0oSEVJSDYyLFoUKeNvlriwLsCxqadyr9D1tp+mvgLeXf31/uHpePof9aQXZL+XJ 2YfmKJzq4X8ZICppm2Z39vumhcEKFYu33w8wadM8Z39fz7r9FWuq/tXNoZzd5t0JFxgiUv+eP iewaU2Uv8LhmMjPLHvkbKQ076ad2Pfb4vUsg/f/01ZfCrtZ8urv0WolluKMREMt5qLiRACzyW R34gIAAA== X-Env-Sender: zhaoshenglong@huawei.com X-Msg-Ref: server-8.tower-27.messagelabs.com!1459423511!31022311!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: 8.28; banners=-,-,- X-VirusChecked: Checked Received: (qmail 35352 invoked from network); 31 Mar 2016 11:25:14 -0000 Received: from szxga03-in.huawei.com (HELO szxga03-in.huawei.com) (119.145.14.66) by server-8.tower-27.messagelabs.com with RC4-SHA encrypted SMTP; 31 Mar 2016 11:25:14 -0000 Received: from 172.24.1.48 (EHLO szxeml428-hub.china.huawei.com) ([172.24.1.48]) by szxrg03-dlp.huawei.com (MOS 4.4.3-GA FastPath queued) with ESMTP id BZB13917; Thu, 31 Mar 2016 19:25:03 +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 19:24:53 +0800 From: Shannon Zhao To: , , Date: Thu, 31 Mar 2016 19:23:34 +0800 Message-ID: <1459423425-1220-7-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=0001.0A0B0204.56FD0910.02F5, 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: 510444e249d89d82661057b05253aa96 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 06/17] Xen: ARM: Add support for mapping platform 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" 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: Shannon Zhao Add a bus_notifier for platform bus device in order to map the device mmio regions when DOM0 booting with ACPI. Signed-off-by: Shannon Zhao Acked-by: Stefano Stabellini --- drivers/xen/Makefile | 1 + drivers/xen/arm-device.c | 141 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 142 insertions(+) create mode 100644 drivers/xen/arm-device.c diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile index 9b7a35c..415f286 100644 --- a/drivers/xen/Makefile +++ b/drivers/xen/Makefile @@ -9,6 +9,7 @@ CFLAGS_features.o := $(nostackp) CFLAGS_efi.o += -fshort-wchar +dom0-$(CONFIG_ARM64) += arm-device.o dom0-$(CONFIG_PCI) += pci.o dom0-$(CONFIG_USB_SUPPORT) += dbgp.o dom0-$(CONFIG_XEN_ACPI) += acpi.o $(xen-pad-y) diff --git a/drivers/xen/arm-device.c b/drivers/xen/arm-device.c new file mode 100644 index 0000000..76e26e5 --- /dev/null +++ b/drivers/xen/arm-device.c @@ -0,0 +1,141 @@ +/* + * Copyright (c) 2015, Linaro Limited, Shannon Zhao + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include + +static int xen_unmap_device_mmio(struct resource *resource, unsigned int count) +{ + unsigned int i, j, nr; + int rc = 0; + struct resource *r; + struct xen_remove_from_physmap xrp; + + for (i = 0; i < count; i++) { + r = &resource[i]; + nr = DIV_ROUND_UP(resource_size(r), XEN_PAGE_SIZE); + if ((resource_type(r) != IORESOURCE_MEM) || (nr == 0)) + continue; + + for (j = 0; j < nr; j++) { + xrp.domid = DOMID_SELF; + xrp.gpfn = XEN_PFN_DOWN(r->start) + j; + rc = HYPERVISOR_memory_op(XENMEM_remove_from_physmap, + &xrp); + if (rc) + return rc; + } + } + + return rc; +} + +static int xen_map_device_mmio(struct resource *resource, unsigned int count) +{ + unsigned int i, j, nr; + int rc = 0; + struct resource *r; + xen_pfn_t *gpfns; + xen_ulong_t *idxs; + int *errs; + struct xen_add_to_physmap_range xatp; + + for (i = 0; i < count; i++) { + r = &resource[i]; + nr = DIV_ROUND_UP(resource_size(r), XEN_PAGE_SIZE); + if ((resource_type(r) != IORESOURCE_MEM) || (nr == 0)) + continue; + + gpfns = kzalloc(sizeof(xen_pfn_t) * nr, GFP_KERNEL); + idxs = kzalloc(sizeof(xen_ulong_t) * nr, GFP_KERNEL); + errs = kzalloc(sizeof(int) * nr, GFP_KERNEL); + if (!gpfns || !idxs || !errs) { + kfree(gpfns); + kfree(idxs); + kfree(errs); + return -ENOMEM; + } + + for (j = 0; j < nr; j++) { + gpfns[j] = XEN_PFN_DOWN(r->start) + j; + idxs[j] = XEN_PFN_DOWN(r->start) + j; + } + + xatp.domid = DOMID_SELF; + xatp.size = nr; + xatp.space = XENMAPSPACE_dev_mmio; + + set_xen_guest_handle(xatp.gpfns, gpfns); + set_xen_guest_handle(xatp.idxs, idxs); + set_xen_guest_handle(xatp.errs, errs); + + rc = HYPERVISOR_memory_op(XENMEM_add_to_physmap_range, &xatp); + kfree(gpfns); + kfree(idxs); + kfree(errs); + if (rc) + return rc; + } + + return rc; +} + +static int xen_platform_notifier(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct platform_device *pdev = to_platform_device(data); + int r = 0; + + if (pdev->num_resources == 0 || pdev->resource == NULL) + return NOTIFY_OK; + + switch (action) { + case BUS_NOTIFY_ADD_DEVICE: + r = xen_map_device_mmio(pdev->resource, pdev->num_resources); + break; + case BUS_NOTIFY_DEL_DEVICE: + r = xen_unmap_device_mmio(pdev->resource, pdev->num_resources); + break; + default: + return NOTIFY_DONE; + } + if (r) + dev_err(&pdev->dev, "Platform: Failed to %s device %s MMIO!\n", + action == BUS_NOTIFY_ADD_DEVICE ? "map" : + (action == BUS_NOTIFY_DEL_DEVICE ? "unmap" : "?"), + pdev->name); + + return NOTIFY_OK; +} + +static struct notifier_block platform_device_nb = { + .notifier_call = xen_platform_notifier, +}; + +static int __init register_xen_platform_notifier(void) +{ + if (!xen_initial_domain() || acpi_disabled) + return 0; + + return bus_register_notifier(&platform_bus_type, &platform_device_nb); +} + +arch_initcall(register_xen_platform_notifier);