From patchwork Wed Jun 10 16:08:54 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suravee Suthikulpanit X-Patchwork-Id: 6582781 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: X-Original-To: patchwork-linux-crypto@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 6F28C9F2F4 for ; Wed, 10 Jun 2015 16:09:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 872AB2053B for ; Wed, 10 Jun 2015 16:09:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D932320592 for ; Wed, 10 Jun 2015 16:09:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966683AbbFJQJR (ORCPT ); Wed, 10 Jun 2015 12:09:17 -0400 Received: from mail-by2on0113.outbound.protection.outlook.com ([207.46.100.113]:62496 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965660AbbFJQJI (ORCPT ); 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Wed, 10 Jun 2015 12:09:03 -0400 (EDT) Received: from SATLEXDAG01.amd.com (10.181.40.3) by SATLVEXEDGE02.amd.com (10.177.96.29) with Microsoft SMTP Server (TLS) id 14.3.195.1; Wed, 10 Jun 2015 11:09:35 -0500 Received: from ssuthiku-fedora-lt.amd.com (10.180.168.240) by SATLEXDAG01.amd.com (10.181.40.3) with Microsoft SMTP Server id 14.3.195.1; Wed, 10 Jun 2015 12:09:02 -0400 From: Suravee Suthikulpanit To: , , , , , , , , , , , CC: , , , , , , , , , , , "Suravee Suthikulpanit" Subject: [V6 PATCH 3/7] device property: Introduces device_dma_is_coherent() Date: Wed, 10 Jun 2015 11:08:54 -0500 Message-ID: <1433952538-22455-4-git-send-email-Suravee.Suthikulpanit@amd.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1433952538-22455-1-git-send-email-Suravee.Suthikulpanit@amd.com> References: <1433952538-22455-1-git-send-email-Suravee.Suthikulpanit@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-Microsoft-Exchange-Diagnostics: 1; BL2FFO11FD038; 1:QlsOZ8l2brCnUDEfHfdPhJr3Y90I/nzrTWw2cy+dghPl1rM3V1v7OgXzxNKkZ8Nzv3qUo/W4/IeoT39Hb6b7NNAhUDkmLT0jY4FBg8g7icNxBejG/XPIU8DSBF5kfIjVxBTwNKNYlDO7zdGUePk/LG1hPUr34F+XNFQSIwOCDo1bWtGQsLf1p+NxVpTDpAx5FPYB2EJuL3ncZDNJAhUyfmnKzeBbk46rJiSQgm4it10RgAysjgJkPqlge+lOM3hf1aYvJFjwEqG81gZ5jGaqanpP1S376m/Zw8yk3u9xdoDDGa+xnKYg9lsWdJLbyNMytX8WajNowAXdzy1Ny7xrKw== X-Forefront-Antispam-Report: CIP:165.204.84.221; 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Ip=[165.204.84.221]; Helo=[atltwp01.amd.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLUPR02MB1105 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 Currently, device drivers, which support both OF and ACPI, need to call two separate APIs, of_dma_is_coherent() and acpi_dma_is_coherent()) to determine device coherency attribute. This patch simplifies this process by introducing a new device property API, device_dma_is_coherent(), which calls the appropriate interface based on the booting architecture. Signed-off-by: Suravee Suthikulpanit --- drivers/base/property.c | 14 ++++++++++++++ include/linux/property.h | 2 ++ 2 files changed, 16 insertions(+) diff --git a/drivers/base/property.c b/drivers/base/property.c index 1d0b116..e645852 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -14,6 +14,7 @@ #include #include #include +#include #include /** @@ -519,3 +520,16 @@ unsigned int device_get_child_node_count(struct device *dev) return count; } EXPORT_SYMBOL_GPL(device_get_child_node_count); + +bool device_dma_is_coherent(struct device *dev) +{ + bool coherent = false; + + if (IS_ENABLED(CONFIG_OF) && dev->of_node) + coherent = of_dma_is_coherent(dev->of_node); + else + acpi_check_dma(ACPI_COMPANION(dev), &coherent); + + return coherent; +} +EXPORT_SYMBOL_GPL(device_dma_is_coherent); diff --git a/include/linux/property.h b/include/linux/property.h index de8bdf4..76ebde9 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -164,4 +164,6 @@ struct property_set { void device_add_property_set(struct device *dev, struct property_set *pset); +bool device_dma_is_coherent(struct device *dev); + #endif /* _LINUX_PROPERTY_H_ */