From patchwork Thu Oct 29 22:23:36 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Helgaas X-Patchwork-Id: 7521601 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D65CDBEEA4 for ; Thu, 29 Oct 2015 22:24:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1138E2084B for ; Thu, 29 Oct 2015 22:24:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B643F208CA for ; Thu, 29 Oct 2015 22:24:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758061AbbJ2WXm (ORCPT ); Thu, 29 Oct 2015 18:23:42 -0400 Received: from mail.kernel.org ([198.145.29.136]:35370 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757232AbbJ2WXi (ORCPT ); Thu, 29 Oct 2015 18:23:38 -0400 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CD31E208B1; Thu, 29 Oct 2015 22:23:37 +0000 (UTC) Received: from localhost (unknown [69.71.1.1]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 071052084B; Thu, 29 Oct 2015 22:23:36 +0000 (UTC) Subject: [PATCH v2 7/7] PCI: Set NumVFs before computing how many buses VFs require To: Alexander Duyck From: Bjorn Helgaas Cc: linux-pci@vger.kernel.org, Ethan Zhao , Wei Yang , linux-kernel@vger.kernel.org Date: Thu, 29 Oct 2015 17:23:36 -0500 Message-ID: <20151029222336.11908.66193.stgit@bhelgaas-glaptop2.roam.corp.google.com> In-Reply-To: <20151029221701.11908.82718.stgit@bhelgaas-glaptop2.roam.corp.google.com> References: <20151029221701.11908.82718.stgit@bhelgaas-glaptop2.roam.corp.google.com> User-Agent: StGit/0.16 MIME-Version: 1.0 X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, 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 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 From: Alexander Duyck VF bus numbers depend on the First VF Offset and VF Stride, and per sections 3.3.9 and 3.3.10 of the SR-IOV spec r1.1, these depend on the NumVF value. Wait until after we set NumVFs to compute and validate the bus number of the last VF. [bhelgaas: changelog, add spec reference, split to separate patch for reviewability] Signed-off-by: Alexander Duyck Signed-off-by: Bjorn Helgaas --- drivers/pci/iov.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index bd1c4fa..9d29712 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -274,13 +274,6 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) return -ENOMEM; } - bus = pci_iov_virtfn_bus(dev, nr_virtfn - 1); - if (bus > dev->bus->busn_res.end) { - dev_err(&dev->dev, "can't enable %d VFs (bus %02x out of range of %pR)\n", - nr_virtfn, bus, &dev->bus->busn_res); - return -ENOMEM; - } - if (pci_enable_resources(dev, bars)) { dev_err(&dev->dev, "SR-IOV: IOV BARS not allocated\n"); return -ENOMEM; @@ -304,6 +297,15 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) } pci_iov_set_numvfs(dev, nr_virtfn); + + bus = pci_iov_virtfn_bus(dev, nr_virtfn - 1); + if (bus > dev->bus->busn_res.end) { + dev_err(&dev->dev, "can't enable %d VFs (bus %02x out of range of %pR)\n", + nr_virtfn, bus, &dev->bus->busn_res); + rc = -ENOMEM; + goto err_bus; + } + iov->ctrl |= PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE; pci_cfg_access_lock(dev); pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl); @@ -342,7 +344,7 @@ err_pcibios: pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl); ssleep(1); pci_cfg_access_unlock(dev); - +err_bus: if (iov->link != dev->devfn) sysfs_remove_link(&dev->dev.kobj, "dep_link");