linux-kernel - [PATCH 3/4] c6x: dma mapping fixes

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Date:	Sun, 22 Nov 2015 17:25:45 +0100
From:	Christoph Hellwig <hch@....de>
To:	akpm@...ux-foundation.org
Cc:	msalter@...hat.com, a-jacquiot@...com,
	linux-kernel@...r.kernel.org, dan.carpenter@...cle.com,
	linux@...ck-us.net
Subject: [PATCH 3/4] c6x: dma mapping fixes

Reported-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Christoph Hellwig <hch@....de>
---
 arch/c6x/include/asm/dma-mapping.h |  6 ++++++
 arch/c6x/kernel/dma.c              |  2 ++
 arch/c6x/mm/dma-coherent.c         | 10 ++++------
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/arch/c6x/include/asm/dma-mapping.h b/arch/c6x/include/asm/dma-mapping.h
index b810147..6b5cd7b 100644
--- a/arch/c6x/include/asm/dma-mapping.h
+++ b/arch/c6x/include/asm/dma-mapping.h
@@ -24,4 +24,10 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
 	return &c6x_dma_ops;
 }
 
+extern void coherent_mem_init(u32 start, u32 size);
+void *c6x_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
+		gfp_t gfp, struct dma_attrs *attrs);
+void c6x_dma_free(struct device *dev, size_t size, void *vaddr,
+		dma_addr_t dma_handle, struct dma_attrs *attrs);
+
 #endif	/* _ASM_C6X_DMA_MAPPING_H */
diff --git a/arch/c6x/kernel/dma.c b/arch/c6x/kernel/dma.c
index 8b7db6e..8a80f3a 100644
--- a/arch/c6x/kernel/dma.c
+++ b/arch/c6x/kernel/dma.c
@@ -122,7 +122,9 @@ struct dma_map_ops c6x_dma_ops = {
 	.alloc			= c6x_dma_alloc,
 	.free			= c6x_dma_free,
 	.map_page		= c6x_dma_map_page,
+	.unmap_page		= c6x_dma_unmap_page,
 	.map_sg			= c6x_dma_map_sg,
+	.unmap_sg		= c6x_dma_unmap_sg,
 	.sync_single_for_device	= c6x_dma_sync_single_for_device,
 	.sync_single_for_cpu	= c6x_dma_sync_single_for_cpu,
 	.sync_sg_for_device	= c6x_dma_sync_sg_for_device,
diff --git a/arch/c6x/mm/dma-coherent.c b/arch/c6x/mm/dma-coherent.c
index 4187e51..f7ee63a 100644
--- a/arch/c6x/mm/dma-coherent.c
+++ b/arch/c6x/mm/dma-coherent.c
@@ -73,8 +73,8 @@ static void __free_dma_pages(u32 addr, int order)
  * Allocate DMA coherent memory space and return both the kernel
  * virtual and DMA address for that space.
  */
-void *dma_alloc_coherent(struct device *dev, size_t size,
-			 dma_addr_t *handle, gfp_t gfp)
+void *c6x_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
+		gfp_t gfp, struct dma_attrs *attrs)
 {
 	u32 paddr;
 	int order;
@@ -94,13 +94,12 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
 
 	return phys_to_virt(paddr);
 }
-EXPORT_SYMBOL(dma_alloc_coherent);
 
 /*
  * Free DMA coherent memory as defined by the above mapping.
  */
-void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
-		       dma_addr_t dma_handle)
+void c6x_dma_free(struct device *dev, size_t size, void *vaddr,
+		dma_addr_t dma_handle, struct dma_attrs *attrs)
 {
 	int order;
 
@@ -111,7 +110,6 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
 
 	__free_dma_pages(virt_to_phys(vaddr), order);
 }
-EXPORT_SYMBOL(dma_free_coherent);
 
 /*
  * Initialise the coherent DMA memory allocator using the given uncached region.
-- 
1.9.1

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