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-rw-r--r--arch/c6x/include/asm/dma-mapping.h91
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/c6x/include/asm/dma-mapping.h b/arch/c6x/include/asm/dma-mapping.h
new file mode 100644
index 00000000000..03579fd99db
--- /dev/null
+++ b/arch/c6x/include/asm/dma-mapping.h
@@ -0,0 +1,91 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef _ASM_C6X_DMA_MAPPING_H
+#define _ASM_C6X_DMA_MAPPING_H
+
+#include <linux/dma-debug.h>
+#include <asm-generic/dma-coherent.h>
+
+#define dma_supported(d, m) 1
+
+static inline int dma_set_mask(struct device *dev, u64 dma_mask)
+{
+ if (!dev->dma_mask || !dma_supported(dev, dma_mask))
+ return -EIO;
+
+ *dev->dma_mask = dma_mask;
+
+ return 0;
+}
+
+/*
+ * DMA errors are defined by all-bits-set in the DMA address.
+ */
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ return dma_addr == ~0;
+}
+
+extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
+ size_t size, enum dma_data_direction dir);
+
+extern void dma_unmap_single(struct device *dev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir);
+
+extern int dma_map_sg(struct device *dev, struct scatterlist *sglist,
+ int nents, enum dma_data_direction direction);
+
+extern void dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
+ int nents, enum dma_data_direction direction);
+
+static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir)
+{
+ dma_addr_t handle;
+
+ handle = dma_map_single(dev, page_address(page) + offset, size, dir);
+
+ debug_dma_map_page(dev, page, offset, size, dir, handle, false);
+
+ return handle;
+}
+
+static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir)
+{
+ dma_unmap_single(dev, handle, size, dir);
+
+ debug_dma_unmap_page(dev, handle, size, dir, false);
+}
+
+extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir);
+
+extern void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
+ size_t size,
+ enum dma_data_direction dir);
+
+extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir);
+
+extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir);
+
+extern void coherent_mem_init(u32 start, u32 size);
+extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);
+extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t);
+
+#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))
+
+#endif /* _ASM_C6X_DMA_MAPPING_H */