Commit-ID: 99becaca86d184a4433e9fde879ff97303d7669f
Gitweb: http://git.kernel.org/tip/99becaca86d184a4433e9fde879ff97303d7669f
Author: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
AuthorDate: Fri, 10 Jul 2009 10:04:54 +0900
Committer: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
CommitDate: Tue, 28 Jul 2009 14:19:19 +0900
x86: add dma_capable() to replace is_buffer_dma_capable()
dma_capable() eventually replaces is_buffer_dma_capable(), which tells
if a memory area is dma-capable or not. The problem of
is_buffer_dma_capable() is that it doesn't take a pointer to struct
device so it doesn't work for POWERPC.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
---
arch/x86/include/asm/dma-mapping.h | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index 1c3f943..adac59c 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -55,6 +55,14 @@ extern int dma_set_mask(struct device *dev, u64 mask);
extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag);
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
+{
+ if (!dev->dma_mask)
+ return 0;
+
+ return addr + size <= *dev->dma_mask;
+}
+
static inline void
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir)
--
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