From patchwork Tue May 25 03:50:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Xingang X-Patchwork-Id: 12277747 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90C5FC2B9F8 for ; Tue, 25 May 2021 03:51:59 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4A85861417 for ; Tue, 25 May 2021 03:51:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4A85861417 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:45128 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1llO6o-0002Kx-Cn for qemu-devel@archiver.kernel.org; Mon, 24 May 2021 23:51:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57642) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1llO5L-0006Of-O0; Mon, 24 May 2021 23:50:27 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:3433) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1llO5H-0001lO-Ht; Mon, 24 May 2021 23:50:27 -0400 Received: from dggems705-chm.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4Fq0PV6RKqzP0HX; Tue, 25 May 2021 11:46:38 +0800 (CST) Received: from dggpemm500009.china.huawei.com (7.185.36.225) by dggems705-chm.china.huawei.com (10.3.19.182) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Tue, 25 May 2021 11:50:14 +0800 Received: from huawei.com (10.174.185.226) by dggpemm500009.china.huawei.com (7.185.36.225) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Tue, 25 May 2021 11:50:14 +0800 From: Wang Xingang To: , , , , , , , , , , Subject: [PATCH v4 5/8] hw/pci: Add pci_bus_range to get bus number range Date: Tue, 25 May 2021 03:50:02 +0000 Message-ID: <1621914605-14724-6-git-send-email-wangxingang5@huawei.com> X-Mailer: git-send-email 2.6.4.windows.1 In-Reply-To: <1621914605-14724-1-git-send-email-wangxingang5@huawei.com> References: <1621914605-14724-1-git-send-email-wangxingang5@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.185.226] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpemm500009.china.huawei.com (7.185.36.225) X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.191; envelope-from=wangxingang5@huawei.com; helo=szxga05-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xieyingtai@huawei.com, wangxingang5@huawei.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Xingang Wang This helps to get the bus number range of a pci bridge hierarchy. Signed-off-by: Xingang Wang Reviewed-by: Eric Auger --- hw/pci/pci.c | 15 +++++++++++++++ include/hw/pci/pci.h | 1 + 2 files changed, 16 insertions(+) diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 27d588e268..7f18ea5ef5 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -537,6 +537,21 @@ int pci_bus_num(PCIBus *s) return PCI_BUS_GET_CLASS(s)->bus_num(s); } +void pci_bus_range(PCIBus *bus, int *min_bus, int *max_bus) +{ + int i; + *min_bus = *max_bus = pci_bus_num(bus); + + for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { + PCIDevice *dev = bus->devices[i]; + + if (dev && PCI_DEVICE_GET_CLASS(dev)->is_bridge) { + *min_bus = MIN(*min_bus, dev->config[PCI_SECONDARY_BUS]); + *max_bus = MAX(*max_bus, dev->config[PCI_SUBORDINATE_BUS]); + } + } +} + int pci_bus_numa_node(PCIBus *bus) { return PCI_BUS_GET_CLASS(bus)->numa_node(bus); diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index f4d51b672b..d0f4266e37 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -450,6 +450,7 @@ static inline PCIBus *pci_get_bus(const PCIDevice *dev) return PCI_BUS(qdev_get_parent_bus(DEVICE(dev))); } int pci_bus_num(PCIBus *s); +void pci_bus_range(PCIBus *bus, int *min_bus, int *max_bus); static inline int pci_dev_bus_num(const PCIDevice *dev) { return pci_bus_num(pci_get_bus(dev));