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authorJoerg Roedel <joerg.roedel@amd.com>2008-08-19 16:32:45 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-22 08:34:51 +0200
commit6c505ce3930c6a6b455cda53fab3e88ae44f8221 (patch)
tree5b6254c6589f458ad0af21d7f6fbc998ebfd3714 /include
parentc647c3bb2d16246a87f49035985ddb7c1eb030df (diff)
x86: move dma_*_coherent functions to include file
All the x86 DMA-API functions are defined in asm/dma-mapping.h. This patch moves the dma_*_coherent functions also to this header file because they are now small enough to do so. This is done as a separate patch because it also includes some renaming and restructuring of the dma-mapping.h file. Signed-off-by: Joerg Roedel <joerg.roede@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/asm-x86/dma-mapping.h47
1 files changed, 37 insertions, 10 deletions
diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h
index ad9cd6d49bfc..8e16095d1fa9 100644
--- a/include/asm-x86/dma-mapping.h
+++ b/include/asm-x86/dma-mapping.h
@@ -9,10 +9,11 @@
#include <linux/scatterlist.h>
#include <asm/io.h>
#include <asm/swiotlb.h>
+#include <asm-generic/dma-coherent.h>
extern dma_addr_t bad_dma_address;
extern int iommu_merge;
-extern struct device fallback_dev;
+extern struct device x86_dma_fallback_dev;
extern int panic_on_overflow;
extern int force_iommu;
@@ -87,13 +88,7 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
#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)
-
-void *dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag);
-
-void dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle);
-
+#define dma_is_consistent(d, h) (1)
extern int dma_supported(struct device *hwdev, u64 mask);
extern int dma_set_mask(struct device *dev, u64 mask);
@@ -247,7 +242,39 @@ static inline int dma_get_cache_alignment(void)
return boot_cpu_data.x86_clflush_size;
}
-#define dma_is_consistent(d, h) (1)
+static inline void *
+dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
+ gfp_t gfp)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(dev);
+ void *memory;
+
+ if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
+ return memory;
+
+ if (!dev) {
+ dev = &x86_dma_fallback_dev;
+ gfp |= GFP_DMA;
+ }
+
+ if (ops->alloc_coherent)
+ return ops->alloc_coherent(dev, size,
+ dma_handle, gfp);
+ return NULL;
+}
+
+static inline void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t bus)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(dev);
+
+ WARN_ON(irqs_disabled()); /* for portability */
+
+ if (dma_release_from_coherent(dev, get_order(size), vaddr))
+ return;
+
+ if (ops->free_coherent)
+ ops->free_coherent(dev, size, vaddr, bus);
+}
-#include <asm-generic/dma-coherent.h>
#endif