From patchwork Wed Oct 9 20:48:21 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 3011641 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 43356BF924 for ; Wed, 9 Oct 2013 20:53:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5B082200F4 for ; Wed, 9 Oct 2013 20:53:33 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3F55E20138 for ; Wed, 9 Oct 2013 20:53:32 +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 1VU0jX-0001VQ-EG; Wed, 09 Oct 2013 20:51:52 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VU0iz-00009I-1Z; Wed, 09 Oct 2013 20:51:17 +0000 Received: from smtp.citrix.com ([66.165.176.89]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VU0hu-0008QR-8z for linux-arm-kernel@lists.infradead.org; Wed, 09 Oct 2013 20:50:13 +0000 X-IronPort-AV: E=Sophos;i="4.90,1066,1371081600"; d="scan'208";a="62111338" Received: from accessns.citrite.net (HELO FTLPEX01CL01.citrite.net) ([10.9.154.239]) by FTLPIPO01.CITRIX.COM with ESMTP; 09 Oct 2013 20:49:27 +0000 Received: from ukmail1.uk.xensource.com (10.80.16.128) by smtprelay.citrix.com (10.13.107.78) with Microsoft SMTP Server id 14.2.342.4; Wed, 9 Oct 2013 16:49:27 -0400 Received: from kaball.uk.xensource.com ([10.80.2.59]) by ukmail1.uk.xensource.com with esmtp (Exim 4.69) (envelope-from ) id 1VU0h7-00075H-US; Wed, 09 Oct 2013 21:49:21 +0100 From: Stefano Stabellini To: Subject: [PATCH v8 08/17] arm/xen: get_dma_ops: return xen_dma_ops if we are running as xen_initial_domain Date: Wed, 9 Oct 2013 21:48:21 +0100 Message-ID: <1381351710-1876-8-git-send-email-stefano.stabellini@eu.citrix.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-DLP: MIA1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131009_165010_641443_48245C44 X-CRM114-Status: UNSURE ( 9.69 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -7.1 (-------) Cc: linux@arm.linux.org.uk, Ian.Campbell@citrix.com, Stefano Stabellini , konrad.wilk@oracle.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.4 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 We can't simply override arm_dma_ops with xen_dma_ops because devices are allowed to have their own dma_ops and they take precedence over arm_dma_ops. When running on Xen as initial domain, we always want xen_dma_ops to be the one in use. Signed-off-by: Stefano Stabellini Suggested-by: Catalin Marinas CC: will.deacon@arm.com CC: linux@arm.linux.org.uk Changes in v7: - return xen_dma_ops only if we are the initial domain; - rename __get_dma_ops to __generic_dma_ops. --- arch/arm/include/asm/dma-mapping.h | 13 ++++++++++++- 1 files changed, 12 insertions(+), 1 deletions(-) diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index 9aa5384..d03519a 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -12,17 +12,28 @@ #include #include +#include +#include + #define DMA_ERROR_CODE (~0) extern struct dma_map_ops arm_dma_ops; extern struct dma_map_ops arm_coherent_dma_ops; -static inline struct dma_map_ops *get_dma_ops(struct device *dev) +static inline struct dma_map_ops *__generic_dma_ops(struct device *dev) { if (dev && dev->archdata.dma_ops) return dev->archdata.dma_ops; return &arm_dma_ops; } +static inline struct dma_map_ops *get_dma_ops(struct device *dev) +{ + if (xen_initial_domain()) + return xen_dma_ops; + else + return __generic_dma_ops(dev); +} + static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops) { BUG_ON(!dev);