From patchwork Mon Apr 4 15:14:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12800458 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81AD5C433F5 for ; Mon, 4 Apr 2022 15:30:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346089AbiDDPcC (ORCPT ); Mon, 4 Apr 2022 11:32:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378594AbiDDPcA (ORCPT ); Mon, 4 Apr 2022 11:32:00 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 826E125C69 for ; Mon, 4 Apr 2022 08:30:02 -0700 (PDT) Received: from fraeml713-chm.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KXF4r6J3fz67HnK; Mon, 4 Apr 2022 23:27:08 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml713-chm.china.huawei.com (10.206.15.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 4 Apr 2022 17:30:00 +0200 Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 4 Apr 2022 16:29:59 +0100 From: Jonathan Cameron To: , , =?utf-8?q?Alex_Benn?= =?utf-8?q?=C3=A9e?= , Marcel Apfelbaum , "Michael S . Tsirkin" , Igor Mammedov , Markus Armbruster , "Mark Cave-Ayland" , Adam Manzanares CC: , Ben Widawsky , "Peter Maydell" , Shameerali Kolothum Thodi , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Peter Xu , David Hildenbrand , Paolo Bonzini , Saransh Gupta1 , Shreyas Shah , Chris Browy , "Samarth Saxena" , Dan Williams , "k . jensen @ samsung . com" , Tong Zhang , , Alison Schofield Subject: [PATCH v9 30/45] pci/pcie_port: Add pci_find_port_by_pn() Date: Mon, 4 Apr 2022 16:14:30 +0100 Message-ID: <20220404151445.10955-31-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220404151445.10955-1-Jonathan.Cameron@huawei.com> References: <20220404151445.10955-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.122.247.231] X-ClientProxiedBy: lhreml717-chm.china.huawei.com (10.201.108.68) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org From: Jonathan Cameron Simple function to search a PCIBus to find a port by it's port number. CXL interleave decoding uses the port number as a target so it is necessary to locate the port when doing interleave decoding. Signed-off-by: Jonathan Cameron Reviewed-by: Alex Bennée --- hw/pci/pcie_port.c | 25 +++++++++++++++++++++++++ include/hw/pci/pcie_port.h | 2 ++ 2 files changed, 27 insertions(+) diff --git a/hw/pci/pcie_port.c b/hw/pci/pcie_port.c index e95c1e5519..687e4e763a 100644 --- a/hw/pci/pcie_port.c +++ b/hw/pci/pcie_port.c @@ -136,6 +136,31 @@ static void pcie_port_class_init(ObjectClass *oc, void *data) device_class_set_props(dc, pcie_port_props); } +PCIDevice *pcie_find_port_by_pn(PCIBus *bus, uint8_t pn) +{ + int devfn; + + for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { + PCIDevice *d = bus->devices[devfn]; + PCIEPort *port; + + if (!d || !pci_is_express(d) || !d->exp.exp_cap) { + continue; + } + + if (!object_dynamic_cast(OBJECT(d), TYPE_PCIE_PORT)) { + continue; + } + + port = PCIE_PORT(d); + if (port->port == pn) { + return d; + } + } + + return NULL; +} + static const TypeInfo pcie_port_type_info = { .name = TYPE_PCIE_PORT, .parent = TYPE_PCI_BRIDGE, diff --git a/include/hw/pci/pcie_port.h b/include/hw/pci/pcie_port.h index e25b289ce8..7b8193061a 100644 --- a/include/hw/pci/pcie_port.h +++ b/include/hw/pci/pcie_port.h @@ -39,6 +39,8 @@ struct PCIEPort { void pcie_port_init_reg(PCIDevice *d); +PCIDevice *pcie_find_port_by_pn(PCIBus *bus, uint8_t pn); + #define TYPE_PCIE_SLOT "pcie-slot" OBJECT_DECLARE_SIMPLE_TYPE(PCIESlot, PCIE_SLOT)