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authorJoerg Roedel <joerg.roedel@amd.com>2008-10-15 22:01:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 11:21:28 -0700
commit1648993fb05c487947c1cec6307aca29d8002abe (patch)
tree576134ec852a382e33ab871dc36cd1d4b184961c /include
parent459fc208abd1b365fa013c17d433dfb5b4bc1e3a (diff)
downloadop-kernel-dev-1648993fb05c487947c1cec6307aca29d8002abe.zip
op-kernel-dev-1648993fb05c487947c1cec6307aca29d8002abe.tar.gz
introduce generic header file for the software IO/TLB
A series of patches introduce a generic header file for the software IO/TLB implementation in lib/swiotlb.c. Currently each architecture using this code defines the prototypes itself. The prototypes are moved to include/linux/swiotlb.h and this file is included in architecture specific code for X86 and IA64. This patch: Create include/linux/swiotlb.h file which contains all function prototypes for the lib/swiotlb.c file. (akpm: the dependent patches will be trickled through arch trees) Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/swiotlb.h83
1 files changed, 83 insertions, 0 deletions
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
new file mode 100644
index 0000000..b18ec55
--- /dev/null
+++ b/include/linux/swiotlb.h
@@ -0,0 +1,83 @@
+#ifndef __LINUX_SWIOTLB_H
+#define __LINUX_SWIOTLB_H
+
+#include <linux/types.h>
+
+struct device;
+struct dma_attrs;
+struct scatterlist;
+
+extern void
+swiotlb_init(void);
+
+extern void
+*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flags);
+
+extern void
+swiotlb_free_coherent(struct device *hwdev, size_t size,
+ void *vaddr, dma_addr_t dma_handle);
+
+extern dma_addr_t
+swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir);
+
+extern void
+swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
+ size_t size, int dir);
+
+extern dma_addr_t
+swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
+ int dir, struct dma_attrs *attrs);
+
+extern void
+swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
+ size_t size, int dir, struct dma_attrs *attrs);
+
+extern int
+swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
+ int direction);
+
+extern void
+swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
+ int direction);
+
+extern int
+swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
+ int dir, struct dma_attrs *attrs);
+
+extern void
+swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
+ int nelems, int dir, struct dma_attrs *attrs);
+
+extern void
+swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
+ size_t size, int dir);
+
+extern void
+swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
+ int nelems, int dir);
+
+extern void
+swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
+ size_t size, int dir);
+
+extern void
+swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
+ int nelems, int dir);
+
+extern void
+swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
+ unsigned long offset, size_t size, int dir);
+
+extern void
+swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
+ unsigned long offset, size_t size,
+ int dir);
+
+extern int
+swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
+
+extern int
+swiotlb_dma_supported(struct device *hwdev, u64 mask);
+
+#endif /* __LINUX_SWIOTLB_H */
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