linux-kernel - [PATCH v3 1/3] arm64: Provide default implementation for dma_{alloc,free}

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Date:	Tue, 28 May 2013 10:37:14 +0900
From:	Damian Hobson-Garcia <dhobsong@...l.co.jp>
To:	linux-kernel@...r.kernel.org
Cc:	catalin.marinas@....com, will.deacon@....com,
	linux-arm-kernel@...ts.infradead.org,
	Damian Hobson-Garcia <dhobsong@...l.co.jp>
Subject: [PATCH v3 1/3] arm64: Provide default implementation for dma_{alloc,free}_attrs

Most architectures that define CONFIG_HAS_DMA, have implementations for
both dma_alloc_attrs() and dma_free_attrs().  All achitectures that do
not define CONFIG_HAS_DMA also have both of these definitions provided by
dma-mapping-broken.h.

Add default implementations for these functions on arm64.

Signed-off-by: Damian Hobson-Garcia <dhobsong@...l.co.jp>
---

 arch/arm64/include/asm/dma-mapping.h |   17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index 9947768..6ff7b8d 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h
@@ -81,8 +81,12 @@ static inline void dma_mark_clean(void *addr, size_t size)
 {
 }
 
-static inline void *dma_alloc_coherent(struct device *dev, size_t size,
-				       dma_addr_t *dma_handle, gfp_t flags)
+#define dma_alloc_coherent(d, s, h, f) dma_alloc_attrs(d, s, h, f, NULL)
+#define dma_free_coherent(d, s, h, f) dma_free_attrs(d, s, h, f, NULL)
+
+static inline void *dma_alloc_attrs(struct device *dev, size_t size,
+				       dma_addr_t *dma_handle, gfp_t flags,
+				       struct dma_attrs *attrs)
 {
 	struct dma_map_ops *ops = get_dma_ops(dev);
 	void *vaddr;
@@ -90,13 +94,14 @@ static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 	if (dma_alloc_from_coherent(dev, size, dma_handle, &vaddr))
 		return vaddr;
 
-	vaddr = ops->alloc(dev, size, dma_handle, flags, NULL);
+	vaddr = ops->alloc(dev, size, dma_handle, flags, attrs);
 	debug_dma_alloc_coherent(dev, size, *dma_handle, vaddr);
 	return vaddr;
 }
 
-static inline void dma_free_coherent(struct device *dev, size_t size,
-				     void *vaddr, dma_addr_t dev_addr)
+static inline void dma_free_attrs(struct device *dev, size_t size,
+				     void *vaddr, dma_addr_t dev_addr,
+				     struct dma_attrs *attrs)
 {
 	struct dma_map_ops *ops = get_dma_ops(dev);
 
@@ -104,7 +109,7 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
 		return;
 
 	debug_dma_free_coherent(dev, size, vaddr, dev_addr);
-	ops->free(dev, size, vaddr, dev_addr, NULL);
+	ops->free(dev, size, vaddr, dev_addr, attrs);
 }
 
 /*
-- 
1.7.5.4

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