From patchwork Thu Feb 1 16:11:18 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 10195611 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.web.codeaurora.org (Postfix) with ESMTP id 4604760247 for ; Thu, 1 Feb 2018 16:11:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3430B28C12 for ; Thu, 1 Feb 2018 16:11:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 291E928C82; Thu, 1 Feb 2018 16:11:38 +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=-6.9 required=2.0 tests=BAYES_00,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 03DC028C84 for ; Thu, 1 Feb 2018 16:11:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752535AbeBAQLe (ORCPT ); Thu, 1 Feb 2018 11:11:34 -0500 Received: from bastet.se.axis.com ([195.60.68.11]:40558 "EHLO bastet.se.axis.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751881AbeBAQLd (ORCPT ); Thu, 1 Feb 2018 11:11:33 -0500 Received: from localhost (localhost [127.0.0.1]) by bastet.se.axis.com (Postfix) with ESMTP id 92324187F6; Thu, 1 Feb 2018 17:11:31 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at bastet.se.axis.com Received: from bastet.se.axis.com ([IPv6:::ffff:127.0.0.1]) by localhost (bastet.se.axis.com [::ffff:127.0.0.1]) (amavisd-new, port 10024) with LMTP id t4oPlxXL2Olu; Thu, 1 Feb 2018 17:11:29 +0100 (CET) Received: from boulder02.se.axis.com (boulder02.se.axis.com [10.0.8.16]) by bastet.se.axis.com (Postfix) with ESMTPS id AA2D8187EE; Thu, 1 Feb 2018 17:11:29 +0100 (CET) Received: from boulder02.se.axis.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 993381A073; Thu, 1 Feb 2018 17:11:29 +0100 (CET) Received: from boulder02.se.axis.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8DD2A1A072; Thu, 1 Feb 2018 17:11:29 +0100 (CET) Received: from seth.se.axis.com (unknown [10.0.2.172]) by boulder02.se.axis.com (Postfix) with ESMTP; Thu, 1 Feb 2018 17:11:29 +0100 (CET) Received: from lnxartpec1.se.axis.com (lnxartpec1.se.axis.com [10.88.4.10]) by seth.se.axis.com (Postfix) with ESMTP id 814C828B; Thu, 1 Feb 2018 17:11:29 +0100 (CET) Received: by lnxartpec1.se.axis.com (Postfix, from userid 20283) id 7BD0E401AF; Thu, 1 Feb 2018 17:11:29 +0100 (CET) From: Niklas Cassel To: kishon@ti.com, Lorenzo Pieralisi , Arnd Bergmann , Greg Kroah-Hartman Cc: Niklas Cassel , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/3] misc: pci_endpoint_test: Handle 64-bit BARs properly Date: Thu, 1 Feb 2018 17:11:18 +0100 Message-Id: <20180201161119.3852-3-niklas.cassel@axis.com> X-Mailer: git-send-email 2.14.2 In-Reply-To: <20180201161119.3852-1-niklas.cassel@axis.com> References: <20180201161119.3852-1-niklas.cassel@axis.com> X-TM-AS-GCONF: 00 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 A 64-bit BAR uses the succeeding BAR for the upper bits, so we cannot simply call pci_ioremap_bar() on every single BAR. Ignore BARs that does not have a valid resource length. pci 0000:01:00.0: BAR 4: assigned [mem 0xc0300000-0xc031ffff 64bit] pci 0000:01:00.0: BAR 2: assigned [mem 0xc0320000-0xc03203ff 64bit] pci 0000:01:00.0: BAR 0: assigned [mem 0xc0320400-0xc03204ff 64bit] pci-endpoint-test 0000:01:00.0: can't ioremap BAR 1: [??? 0x00000000 flags 0x0] pci-endpoint-test 0000:01:00.0: failed to read BAR1 pci-endpoint-test 0000:01:00.0: can't ioremap BAR 3: [??? 0x00000000 flags 0x0] pci-endpoint-test 0000:01:00.0: failed to read BAR3 pci-endpoint-test 0000:01:00.0: can't ioremap BAR 5: [??? 0x00000000 flags 0x0] pci-endpoint-test 0000:01:00.0: failed to read BAR5 Signed-off-by: Niklas Cassel --- Lorenzo/Bjorn: pci_resource_len() seems to fix my problem, but is it the correct function to use here? If BAR[x] is a 64-bit BAR, I'm assuming that pci_resource_len() on BAR[x+1] will always return 0 (since BAR[x+1] cannot have any prefetchable/type bits when BAR[x] is 64-bit). drivers/misc/pci_endpoint_test.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c index 320276f42653..3af31bfdcfdd 100644 --- a/drivers/misc/pci_endpoint_test.c +++ b/drivers/misc/pci_endpoint_test.c @@ -534,6 +534,8 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev, } for (bar = BAR_0; bar <= BAR_5; bar++) { + if (pci_resource_len(pdev, bar) == 0) + continue; base = pci_ioremap_bar(pdev, bar); if (!base) { dev_err(dev, "failed to read BAR%d\n", bar);