Commit-ID: 9a937c91eea31c4b594ea49a2a23c57003e04987
Gitweb: http://git.kernel.org/tip/9a937c91eea31c4b594ea49a2a23c57003e04987
Author: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
AuthorDate: Fri, 10 Jul 2009 10:04:57 +0900
Committer: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
CommitDate: Tue, 28 Jul 2009 14:19:19 +0900
powerpc: 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>
Acked-by: Becky Bruce <beckyb@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/asm/dma-mapping.h | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index b44aaab..6ff1f85 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -424,6 +424,19 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
#endif
}
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(dev);
+
+ if (ops->addr_needs_map && ops->addr_needs_map(dev, addr, size))
+ return 0;
+
+ if (!dev->dma_mask)
+ return 0;
+
+ return addr + size <= *dev->dma_mask;
+}
+
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
#ifdef CONFIG_NOT_COHERENT_CACHE
--
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