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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2007-02-12 14:26:05 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-02-12 14:26:05 -0500
commitf454aa6b90be8c5845d1e4716e12479f6ba26538 (patch)
tree41d6f27ab7b15d7ed6c83eaa035e86ce493d946c /include/asm-arm/dma-mapping.h
parent017cc022b6f0a0619cc3b0bba43e1c3247b06779 (diff)
[ARM] Provide dummy noncoherent DMA API
We don't currently support the noncoherent DMA API, but it needs to be provided for kernels with devres to link. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm/dma-mapping.h')
-rw-r--r--include/asm-arm/dma-mapping.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/asm-arm/dma-mapping.h b/include/asm-arm/dma-mapping.h
index 9bc46b486afb..a59399915bcd 100644
--- a/include/asm-arm/dma-mapping.h
+++ b/include/asm-arm/dma-mapping.h
@@ -61,6 +61,22 @@ static inline int dma_mapping_error(dma_addr_t dma_addr)
61 return dma_addr == ~0; 61 return dma_addr == ~0;
62} 62}
63 63
64/*
65 * Dummy noncoherent implementation. We don't provide a dma_cache_sync
66 * function so drivers using this API are highlighted with build warnings.
67 */
68static inline void *
69dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
70{
71 return NULL;
72}
73
74static inline void
75dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
76 dma_addr_t handle)
77{
78}
79
64/** 80/**
65 * dma_alloc_coherent - allocate consistent memory for DMA 81 * dma_alloc_coherent - allocate consistent memory for DMA
66 * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices 82 * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices