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-rw-r--r--include/asm-x86_64/swiotlb.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/include/asm-x86_64/swiotlb.h b/include/asm-x86_64/swiotlb.h
new file mode 100644
index 0000000..3629306
--- /dev/null
+++ b/include/asm-x86_64/swiotlb.h
@@ -0,0 +1,40 @@
+#ifndef _ASM_SWIOTLB_H
+#define _ASM_SWTIOLB_H 1
+
+#include <linux/config.h>
+
+/* SWIOTLB interface */
+
+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 void swiotlb_sync_single_for_cpu(struct device *hwdev,
+ dma_addr_t dev_addr,
+ size_t size, 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_cpu(struct device *hwdev,
+ struct scatterlist *sg, int nelems,
+ int dir);
+extern void swiotlb_sync_sg_for_device(struct device *hwdev,
+ struct scatterlist *sg, int nelems,
+ int dir);
+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_dma_mapping_error(dma_addr_t dma_addr);
+extern void *swiotlb_alloc_coherent (struct device *hwdev, size_t size,
+ dma_addr_t *dma_handle, int flags);
+extern void swiotlb_free_coherent (struct device *hwdev, size_t size,
+ void *vaddr, dma_addr_t dma_handle);
+
+#ifdef CONFIG_SWIOTLB
+extern int swiotlb;
+#else
+#define swiotlb 0
+#endif
+
+#endif
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