From patchwork Mon Mar 3 17:33:11 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liviu Dudau X-Patchwork-Id: 3755821 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E4C36BF13A for ; Mon, 3 Mar 2014 17:34:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2727B203F1 for ; Mon, 3 Mar 2014 17:34:20 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F310A203AF for ; Mon, 3 Mar 2014 17:34:18 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WKWkX-0004W6-E6; Mon, 03 Mar 2014 17:33:57 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WKWkU-0006uZ-Kz; Mon, 03 Mar 2014 17:33:54 +0000 Received: from fw-tnat.cambridge.arm.com ([217.140.96.21] helo=cam-smtp0.cambridge.arm.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WKWkQ-0006sy-Me for linux-arm-kernel@lists.infradead.org; Mon, 03 Mar 2014 17:33:51 +0000 Received: from e106497-lin.cambridge.arm.com (e106497-lin.cambridge.arm.com [10.1.195.170]) by cam-smtp0.cambridge.arm.com (8.13.8/8.13.8) with ESMTP id s23HXGx8016067; Mon, 3 Mar 2014 17:33:18 GMT From: Liviu Dudau To: linux-pci , Bjorn Helgaas , Catalin Marinas , Will Deacon , linaro-kernel Subject: [PATCH v4 1/6] pci: Introduce pci_register_io_range() helper function. Date: Mon, 3 Mar 2014 17:33:11 +0000 Message-Id: <1393867996-32299-2-git-send-email-Liviu.Dudau@arm.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1393867996-32299-1-git-send-email-Liviu.Dudau@arm.com> References: <1393867996-32299-1-git-send-email-Liviu.Dudau@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140303_123350_960565_417B7431 X-CRM114-Status: UNSURE ( 6.71 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.6 (--) Cc: Benjamin Herrenschmidt , Tanmay Inamdar , LKML , LAKML , "devicetree@vger.kernel.org" X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 Some architectures do not share x86 simple view of the I/O space and instead use a range of addresses that map to external devices. For PCI, these ranges can be expressed by OF bindings in a device tree file. Introduce a pci_register_io_range() helper function that can be used by the architecture code to keep track of the io ranges described by the PCI bindings. Signed-off-by: Liviu Dudau diff --git a/drivers/of/address.c b/drivers/of/address.c index 1a54f1f..d1bb30f 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -619,6 +619,11 @@ const __be32 *of_get_address(struct device_node *dev, int index, u64 *size, } EXPORT_SYMBOL(of_get_address); +int __weak pci_register_io_range(phys_addr_t addr, resource_size_t size) +{ + return 0; +} + unsigned long __weak pci_address_to_pio(phys_addr_t address) { if (address > IO_SPACE_LIMIT) diff --git a/include/linux/of_address.h b/include/linux/of_address.h index 5f6ed6b..40c418d 100644 --- a/include/linux/of_address.h +++ b/include/linux/of_address.h @@ -56,6 +56,7 @@ extern void __iomem *of_iomap(struct device_node *device, int index); extern const __be32 *of_get_address(struct device_node *dev, int index, u64 *size, unsigned int *flags); +extern int pci_register_io_range(phys_addr_t addr, resource_size_t size); extern unsigned long pci_address_to_pio(phys_addr_t addr); extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,