From patchwork Mon Mar 11 13:31:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Miroshnichenko X-Patchwork-Id: 10847475 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 135BB1874 for ; Mon, 11 Mar 2019 13:32:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 634132948E for ; Mon, 11 Mar 2019 13:31:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6167F29491; Mon, 11 Mar 2019 13:31:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E817B29493 for ; Mon, 11 Mar 2019 13:31:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727708AbfCKNbp (ORCPT ); Mon, 11 Mar 2019 09:31:45 -0400 Received: from mta-01.yadro.com ([89.207.88.251]:50956 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727669AbfCKNbp (ORCPT ); Mon, 11 Mar 2019 09:31:45 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 4013C41860; Mon, 11 Mar 2019 13:31:43 +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 :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1552311102; x=1554125503; bh=ES4IHYHawY+rGNAmCsSDSgYU25ke2e/UjSw 9HcjfDXE=; b=C/jBGkrTep+X72mxk3fx8zgYxE9ykTcnb9p1pCoQRm5n117jRAB PvE9q5+g09D3y3qIg8MQUHUjKJPIA0LlyaAsHcH44w5J5pPUxL6908ORCOvel86T yur4iLHhFKDFwzHr2Qx9/SafCGFpH70CfkWqdgq/SgzqtG5P0QUz1l04= 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 yF24H1U3X0Y8; Mon, 11 Mar 2019 16:31:42 +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 0873E419E9; Mon, 11 Mar 2019 16:31:34 +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; Mon, 11 Mar 2019 16:31:33 +0300 From: Sergey Miroshnichenko To: , CC: Bjorn Helgaas , , Sergey Miroshnichenko Subject: [PATCH RFC v4 18/21] PCI: Make sure bridge windows include their fixed BARs Date: Mon, 11 Mar 2019 16:31:19 +0300 Message-ID: <20190311133122.11417-19-s.miroshnichenko@yadro.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190311133122.11417-1-s.miroshnichenko@yadro.com> References: <20190311133122.11417-1-s.miroshnichenko@yadro.com> 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) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Consider previously calculated boundaries when allocating a bridge window, setting the lowest allowed address and checking the result. Signed-off-by: Sergey Miroshnichenko --- drivers/pci/bus.c | 2 +- drivers/pci/setup-res.c | 31 +++++++++++++++++++++++++++++-- 2 files changed, 30 insertions(+), 3 deletions(-) diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index a9784144d6f2..ce2d2aeedbd3 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -192,7 +192,7 @@ static int pci_bus_alloc_from_region(struct pci_bus *bus, struct resource *res, * this is an already-configured bridge window, its start * overrides "min". */ - if (avail.start) + if (min_used < avail.start) min_used = avail.start; max = avail.end; diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 732d18f60f1b..04442339548d 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -248,9 +248,22 @@ static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev, struct resource *res = dev->resource + resno; resource_size_t min; int ret; + resource_size_t start = (resource_size_t)-1; + resource_size_t end = 0; min = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM; + if (dev->subordinate && resno >= PCI_BRIDGE_RESOURCES) { + struct pci_bus *child_bus = dev->subordinate; + int b_resno = resno - PCI_BRIDGE_RESOURCES; + resource_size_t soft_start = child_bus->fixed_range_soft[b_resno].start; + + start = child_bus->fixed_range_hard[b_resno].start; + end = child_bus->fixed_range_hard[b_resno].end; + if (start < end) + min = soft_start; + } + /* * First, try exact prefetching match. Even if a 64-bit * prefetchable bridge window is below 4GB, we can't put a 32-bit @@ -262,7 +275,7 @@ static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev, IORESOURCE_PREFETCH | IORESOURCE_MEM_64, pcibios_align_resource, dev); if (ret == 0) - return 0; + goto check_fixed; /* * If the prefetchable window is only 32 bits wide, we can put @@ -274,7 +287,7 @@ static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev, IORESOURCE_PREFETCH, pcibios_align_resource, dev); if (ret == 0) - return 0; + goto check_fixed; } /* @@ -287,6 +300,20 @@ static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev, ret = pci_bus_alloc_resource(bus, res, size, align, min, 0, pcibios_align_resource, dev); +check_fixed: + if (ret == 0 && start < end) { + if (res->start > start || res->end < end) { + dev_err(&bus->dev, "%s: fixed area 0x%llx-0x%llx for %s doesn't fit in the allocated %pR (0x%llx-0x%llx)", + __func__, + (unsigned long long)start, (unsigned long long)end, + dev_name(&dev->dev), + res, (unsigned long long)res->start, + (unsigned long long)res->end); + release_resource(res); + return -1; + } + } + return ret; }