From patchwork Sat Oct 9 00:37:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 12546779 X-Patchwork-Delegate: bhelgaas@google.com 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3DE2C433F5 for ; Sat, 9 Oct 2021 00:38:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A31860F90 for ; Sat, 9 Oct 2021 00:38:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244221AbhJIAk2 (ORCPT ); Fri, 8 Oct 2021 20:40:28 -0400 Received: from mga02.intel.com ([134.134.136.20]:5260 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244224AbhJIAkB (ORCPT ); Fri, 8 Oct 2021 20:40:01 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10131"; a="213756532" X-IronPort-AV: E=Sophos;i="5.85,358,1624345200"; d="scan'208";a="213756532" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Oct 2021 17:37:47 -0700 X-IronPort-AV: E=Sophos;i="5.85,358,1624345200"; d="scan'208";a="624905390" Received: from dmsojoza-mobl3.amr.corp.intel.com (HELO skuppusw-desk1.amr.corp.intel.com) ([10.251.135.62]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Oct 2021 17:37:45 -0700 From: Kuppuswamy Sathyanarayanan To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Peter Zijlstra , Andy Lutomirski , Bjorn Helgaas , Richard Henderson , Thomas Bogendoerfer , James E J Bottomley , Helge Deller , "David S . Miller" , Arnd Bergmann , Jonathan Corbet , "Michael S . Tsirkin" , Paolo Bonzini , David Hildenbrand , Andrea Arcangeli , Josh Poimboeuf Cc: Peter H Anvin , Dave Hansen , Tony Luck , Dan Williams , Andi Kleen , Kirill Shutemov , Sean Christopherson , Kuppuswamy Sathyanarayanan , Kuppuswamy Sathyanarayanan , x86@kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: [PATCH v5 10/16] PCI: Consolidate pci_iomap_range(), pci_iomap_wc_range() Date: Fri, 8 Oct 2021 17:37:05 -0700 Message-Id: <20211009003711.1390019-11-sathyanarayanan.kuppuswamy@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211009003711.1390019-1-sathyanarayanan.kuppuswamy@linux.intel.com> References: <20211009003711.1390019-1-sathyanarayanan.kuppuswamy@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Andi Kleen pci_iomap_range() and pci_iomap_wc_range() are currently duplicated code, except that the _wc variant does not support IO ports. So, implement them using a common helper, pci_iomap_range_map(). Also add wrappers for the maps because some architectures implement ioremap and friends with macros. This will allow to add more variants without excessive code duplication. This patch has no functional changes. Signed-off-by: Andi Kleen Signed-off-by: Kuppuswamy Sathyanarayanan --- Changes since v4: * Rebased on top of Tom Lendacky's CC guest changes (https://www.spinics.net/lists/linux-tip-commits/msg58716.html) * Fixed commit log as per Bjorns comments. * Added "support_io" argument to pci_iomap_range_map() to support __pci_ioport_map() only in pci_iomap_range(). lib/pci_iomap.c | 86 ++++++++++++++++++++++++++++--------------------- 1 file changed, 49 insertions(+), 37 deletions(-) diff --git a/lib/pci_iomap.c b/lib/pci_iomap.c index 2d3eb1cb73b8..57bd92f599ee 100644 --- a/lib/pci_iomap.c +++ b/lib/pci_iomap.c @@ -10,6 +10,51 @@ #include #ifdef CONFIG_PCI + +/* + * Callback wrappers because some architectures define ioremap et.al. + * as macros. + */ +static void __iomem *map_ioremap(phys_addr_t addr, size_t size) +{ + return ioremap(addr, size); +} + +static void __iomem *map_ioremap_wc(phys_addr_t addr, size_t size) +{ + return ioremap_wc(addr, size); +} + +static void __iomem *pci_iomap_range_map(struct pci_dev *dev, + int bar, + unsigned long offset, + unsigned long maxlen, + void __iomem *(*mapm)(phys_addr_t, + size_t), + bool support_io) +{ + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); + unsigned long flags = pci_resource_flags(dev, bar); + + if (len <= offset || !start) + return NULL; + len -= offset; + start += offset; + if (maxlen && len > maxlen) + len = maxlen; + if (flags & IORESOURCE_IO) { + if (support_io) + return __pci_ioport_map(dev, start, len); + + return NULL; + } + if (flags & IORESOURCE_MEM) + return mapm(start, len); + /* What? */ + return NULL; +} + /** * pci_iomap_range - create a virtual mapping cookie for a PCI BAR * @dev: PCI device that owns the BAR @@ -30,22 +75,8 @@ void __iomem *pci_iomap_range(struct pci_dev *dev, unsigned long offset, unsigned long maxlen) { - resource_size_t start = pci_resource_start(dev, bar); - resource_size_t len = pci_resource_len(dev, bar); - unsigned long flags = pci_resource_flags(dev, bar); - - if (len <= offset || !start) - return NULL; - len -= offset; - start += offset; - if (maxlen && len > maxlen) - len = maxlen; - if (flags & IORESOURCE_IO) - return __pci_ioport_map(dev, start, len); - if (flags & IORESOURCE_MEM) - return ioremap(start, len); - /* What? */ - return NULL; + return pci_iomap_range_map(dev, bar, offset, maxlen, + map_ioremap, true); } EXPORT_SYMBOL(pci_iomap_range); @@ -70,27 +101,8 @@ void __iomem *pci_iomap_wc_range(struct pci_dev *dev, unsigned long offset, unsigned long maxlen) { - resource_size_t start = pci_resource_start(dev, bar); - resource_size_t len = pci_resource_len(dev, bar); - unsigned long flags = pci_resource_flags(dev, bar); - - - if (flags & IORESOURCE_IO) - return NULL; - - if (len <= offset || !start) - return NULL; - - len -= offset; - start += offset; - if (maxlen && len > maxlen) - len = maxlen; - - if (flags & IORESOURCE_MEM) - return ioremap_wc(start, len); - - /* What? */ - return NULL; + return pci_iomap_range_map(dev, bar, offset, maxlen, + map_ioremap_wc, false); } EXPORT_SYMBOL_GPL(pci_iomap_wc_range);