From patchwork Tue Feb 16 20:39:39 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Niklas_S=C3=B6derlund?= X-Patchwork-Id: 8331501 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Original-To: patchwork-linux-renesas-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id F11809F38B for ; Tue, 16 Feb 2016 20:41:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 607D520266 for ; Tue, 16 Feb 2016 20:41:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B502C20263 for ; Tue, 16 Feb 2016 20:41:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933017AbcBPUkU (ORCPT ); Tue, 16 Feb 2016 15:40:20 -0500 Received: from smtp-3.sys.kth.se ([130.237.48.192]:58044 "EHLO smtp-3.sys.kth.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932079AbcBPUkN (ORCPT ); Tue, 16 Feb 2016 15:40:13 -0500 Received: from smtp-3.sys.kth.se (localhost.localdomain [127.0.0.1]) by smtp-3.sys.kth.se (Postfix) with ESMTP id 3946228BD; Tue, 16 Feb 2016 21:40:11 +0100 (CET) X-Virus-Scanned: by amavisd-new at kth.se Received: from smtp-3.sys.kth.se ([127.0.0.1]) by smtp-3.sys.kth.se (smtp-3.sys.kth.se [127.0.0.1]) (amavisd-new, port 10024) with LMTP id MICHPTxKobtm; Tue, 16 Feb 2016 21:40:10 +0100 (CET) X-KTH-Auth: niso [89.233.230.99] X-KTH-mail-from: niklas.soderlund+renesas@ragnatech.se Received: from bismarck.berto.se (dynamic.0.6.79d1f80.14cc20ac3a53.cust.bredband2.com [89.233.230.99]) by smtp-3.sys.kth.se (Postfix) with ESMTPSA id 97A2C2648; Tue, 16 Feb 2016 21:40:09 +0100 (CET) From: =?UTF-8?q?Niklas=20S=C3=B6derlund?= To: vinod.koul@intel.com, linux-renesas-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, iommu@lists.linux-foundation.org Cc: robin.murphy@arm.com, laurent.pinchart@ideasonboard.com, geert+renesas@glider.be, linus.walleij@linaro.org, dan.j.williams@intel.com, arnd@arndb.de, linux-arch@vger.kernel.org, =?UTF-8?q?Niklas=20S=C3=B6derlund?= Subject: [PATCH v4 3/8] dma-mapping: add dma_{map,unmap}_resource Date: Tue, 16 Feb 2016 21:39:39 +0100 Message-Id: <1455655184-14478-4-git-send-email-niklas.soderlund+renesas@ragnatech.se> X-Mailer: git-send-email 2.7.1 In-Reply-To: <1455655184-14478-1-git-send-email-niklas.soderlund+renesas@ragnatech.se> References: <1455655184-14478-1-git-send-email-niklas.soderlund+renesas@ragnatech.se> MIME-Version: 1.0 Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, 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 Map/Unmap a device resource from a physical address. If no dma_map_ops method is available the operation is a no-op. Signed-off-by: Niklas Söderlund --- include/linux/dma-mapping.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index e3aba4e..cc305d1 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -216,6 +216,38 @@ static inline void dma_unmap_page(struct device *dev, dma_addr_t addr, debug_dma_unmap_page(dev, addr, size, dir, false); } +static inline dma_addr_t dma_map_resource(struct device *dev, + phys_addr_t phys_addr, + size_t size, + enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + unsigned long pfn = __phys_to_pfn(phys_addr); + + BUG_ON(!valid_dma_direction(dir)); + + /* Don't allow RAM to be mapped */ + BUG_ON(pfn_valid(pfn)); + + if (ops->map_resource) + return ops->map_resource(dev, phys_addr, size, dir, attrs); + + return phys_addr; +} + +static inline void dma_unmap_resource(struct device *dev, dma_addr_t addr, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + + BUG_ON(!valid_dma_direction(dir)); + if (ops->unmap_resource) + ops->unmap_resource(dev, addr, size, dir, attrs); + +} + static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, enum dma_data_direction dir)