From patchwork Fri Aug 16 14:17:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Miroshnichenko X-Patchwork-Id: 1148250 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46956m3SbZz9sNC for ; Sat, 17 Aug 2019 00:19:28 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=yadro.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=yadro.com header.i=@yadro.com header.b="GpDrJ/hF"; dkim-atps=neutral Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 46956m192pzDrfX for ; Sat, 17 Aug 2019 00:19:28 +1000 (AEST) X-Original-To: skiboot@lists.ozlabs.org Delivered-To: skiboot@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=yadro.com (client-ip=89.207.88.252; helo=mta-01.yadro.com; envelope-from=s.miroshnichenko@yadro.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=yadro.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=yadro.com header.i=@yadro.com header.b="GpDrJ/hF"; dkim-atps=neutral Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 46954f2F30zDrdf for ; Sat, 17 Aug 2019 00:17:32 +1000 (AEST) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 564AB42ECB for ; Fri, 16 Aug 2019 14:17:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :x-mailer:message-id:date:date:subject:subject:from:from :received:received:received; s=mta-01; t=1565965046; x= 1567779447; bh=o999zo6Dq71/OmnnHiZ6OZIN3VsjoViJTYke9Nk7fZU=; b=G pDrJ/hFfDq0isPK1pcHLWxharUrcOETGLwI3EUXINVwZw8ejQoo7ORdwhLurlb80 A3rwFkxk6ILeukJvfsqNbcYgsiegkEwrQWDthWrfbOHX0rAACXj60/b+Udv2m4Fh 7c3MBuEo2Ejjs2vzvkRzGdmxfRQlnejgubuEZEG4VI= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cAsnqZkJwXYk for ; Fri, 16 Aug 2019 17:17:26 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id 66E08404CB for ; Fri, 16 Aug 2019 17:17:26 +0300 (MSK) Received: from NB-148.yadro.com (172.17.15.60) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Fri, 16 Aug 2019 17:17:26 +0300 From: Sergey Miroshnichenko To: Date: Fri, 16 Aug 2019 17:17:09 +0300 Message-ID: <20190816141714.26380-1-s.miroshnichenko@yadro.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 X-Originating-IP: [172.17.15.60] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) Subject: [Skiboot] [PATCH v3 0/5] core/pci: Track changes of topology by an OS X-BeenThere: skiboot@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Mailing list for skiboot development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux@yadro.com Errors-To: skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Skiboot" An OS may re-enumerate the PCIe tree during boot and after hot-plugging a bridge, but this leads to de-sync of the cached and actual BDF addresses. Track the changes in bus numbering and update the cached topology (a tree consisting of struct pci_device nodes) correspondingly, including PEs. Append the cached topology when reading a config space reveals a hot-added device, with no need for an explicit OPAL call for that. Tested on POWER8 PowerNV+PHB3 ppc64le (Vesnin platform) and Linux kernel 5.3.0-rc4: both vanilla and patched for using the standard pciehp hotplug driver and sysfs rescan instead of the pnv_php driver. Changes since v2: - Removed handling VFs, as skiboot doesn't track them anymore; - Use macros for accessing PCI BDF bits. Changes since v1: - Fixed comparing 32-bit constant with uint16_t and uint8_t. Sergey Miroshnichenko (5): core/pci: Add functions to find accessible devices by bdfn core/pci: Make the pci_scan_one() function public core/pci: Create the struct pci_device nodes automatically core/pci: Hook up the writes to PRIMARY/SECONDARY/SUBORDINATE_BUS registers core/pci: Indicate support for PCI re-enumeration core/pci-opal.c | 101 +++++++++++++++++++++++++++++++++++++++++++++--- core/pci.c | 88 ++++++++++++++++++++++++++++++++++++++++- include/pci.h | 4 ++ 3 files changed, 186 insertions(+), 7 deletions(-)