linux-kernel - [PATCH v6 09/19] arm64/xen: get_dma_ops: return xen_dma

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Message-ID: <1380298207-29151-9-git-send-email-stefano.stabellini@eu.citrix.com>
Date:	Fri, 27 Sep 2013 17:09:57 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	<xen-devel@...ts.xensource.com>
CC:	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <konrad.wilk@...cle.com>,
	<Stefano.Stabellini@...citrix.com>, <Ian.Campbell@...rix.com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	<catalin.marinas@....com>, <will.deacon@....com>
Subject: [PATCH v6 09/19] arm64/xen: get_dma_ops: return xen_dma_ops if we are running on Xen

Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
Suggested-by: Catalin Marinas <catalin.marinas@....com>
CC: catalin.marinas@....com
CC: will.deacon@....com
---
 arch/arm64/include/asm/dma-mapping.h |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index c2cb8a0..1dbd1d5 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h
@@ -23,12 +23,15 @@
 
 #include <asm-generic/dma-coherent.h>
 
+#include <xen/xen.h>
+#include <asm/xen/hypervisor.h>
+
 #define ARCH_HAS_DMA_GET_REQUIRED_MASK
 
 #define DMA_ERROR_CODE	(~0)
 extern struct dma_map_ops *dma_ops;
 
-static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+static inline struct dma_map_ops *__get_dma_ops(struct device *dev)
 {
 	if (unlikely(!dev) || !dev->archdata.dma_ops)
 		return dma_ops;
@@ -36,6 +39,14 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
 		return dev->archdata.dma_ops;
 }
 
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+	if (xen_domain())
+		return xen_dma_ops;
+	else
+		return __get_dma_ops(dev);
+}
+
 #include <asm-generic/dma-mapping-common.h>
 
 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
-- 
1.7.2.5

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