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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-07-08 21:26:59 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-07-12 11:08:12 +0100
commit022ae537b23cb14a391565e9ad9e9945f4b17138 (patch)
treee167c03036fcc09d7131fa364efa70c9e3d5b92a /arch/arm/include
parent3973c337759cd201773a0ecc7b6f39f1ea2a6287 (diff)
ARM: dma: replace ISA_DMA_THRESHOLD with a variable
ISA_DMA_THRESHOLD has been unused by non-arch code, so lets now get rid of it from ARM by replacing it with arm_dma_zone_mask. Move dma_supported() and dma_set_mask() out of line, and have dma_supported() check this new variable instead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/dma-mapping.h29
-rw-r--r--arch/arm/include/asm/memory.h12
2 files changed, 2 insertions, 39 deletions
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 94662f4c9ea..7a21d0bf713 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -115,33 +115,8 @@ static inline void __dma_page_dev_to_cpu(struct page *page, unsigned long off,
___dma_page_dev_to_cpu(page, off, size, dir);
}
-/*
- * Return whether the given device DMA address mask can be supported
- * properly. For example, if your device can only drive the low 24-bits
- * during bus mastering, then you would pass 0x00ffffff as the mask
- * to this function.
- *
- * FIXME: This should really be a platform specific issue - we should
- * return false if GFP_DMA allocations may not satisfy the supplied 'mask'.
- */
-static inline int dma_supported(struct device *dev, u64 mask)
-{
- if (mask < ISA_DMA_THRESHOLD)
- return 0;
- return 1;
-}
-
-static inline int dma_set_mask(struct device *dev, u64 dma_mask)
-{
- if (!dev->dma_mask || !dma_supported(dev, dma_mask))
- return -EIO;
-
-#ifndef CONFIG_DMABOUNCE
- *dev->dma_mask = dma_mask;
-#endif
-
- return 0;
-}
+extern int dma_supported(struct device *, u64);
+extern int dma_set_mask(struct device *, u64);
/*
* DMA errors are defined by all-bits-set in the DMA address.
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index af44a8fb348..b8de516e600 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -204,18 +204,6 @@ static inline unsigned long __phys_to_virt(unsigned long x)
#endif
/*
- * The DMA mask corresponding to the maximum bus address allocatable
- * using GFP_DMA. The default here places no restriction on DMA
- * allocations. This must be the smallest DMA mask in the system,
- * so a successful GFP_DMA allocation will always satisfy this.
- */
-#ifndef ARM_DMA_ZONE_SIZE
-#define ISA_DMA_THRESHOLD (0xffffffffULL)
-#else
-#define ISA_DMA_THRESHOLD (PHYS_OFFSET + ARM_DMA_ZONE_SIZE - 1)
-#endif
-
-/*
* PFNs are used to describe any physical page; this means
* PFN 0 == physical address 0.
*