1/*
 2 *  Port on Texas Instruments TMS320C6x architecture
 3 *
 4 *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
 5 *  Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com>
 6 *
 7 *  This program is free software; you can redistribute it and/or modify
 8 *  it under the terms of the GNU General Public License version 2 as
 9 *  published by the Free Software Foundation.
10 *
11 */
12#ifndef _ASM_C6X_DMA_MAPPING_H
13#define _ASM_C6X_DMA_MAPPING_H
14
15#include <linux/dma-debug.h>
16#include <asm-generic/dma-coherent.h>
17
18#define dma_supported(d, m)	1
19
20static inline int dma_set_mask(struct device *dev, u64 dma_mask)
21{
22	if (!dev->dma_mask || !dma_supported(dev, dma_mask))
23		return -EIO;
24
25	*dev->dma_mask = dma_mask;
26
27	return 0;
28}
29
30/*
31 * DMA errors are defined by all-bits-set in the DMA address.
32 */
33static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
34{
35	return dma_addr == ~0;
36}
37
38extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
39				 size_t size, enum dma_data_direction dir);
40
41extern void dma_unmap_single(struct device *dev, dma_addr_t handle,
42			     size_t size, enum dma_data_direction dir);
43
44extern int dma_map_sg(struct device *dev, struct scatterlist *sglist,
45		      int nents, enum dma_data_direction direction);
46
47extern void dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
48			 int nents, enum dma_data_direction direction);
49
50static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
51				      unsigned long offset, size_t size,
52				      enum dma_data_direction dir)
53{
54	dma_addr_t handle;
55
56	handle = dma_map_single(dev, page_address(page) + offset, size, dir);
57
58	debug_dma_map_page(dev, page, offset, size, dir, handle, false);
59
60	return handle;
61}
62
63static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
64		size_t size, enum dma_data_direction dir)
65{
66	dma_unmap_single(dev, handle, size, dir);
67
68	debug_dma_unmap_page(dev, handle, size, dir, false);
69}
70
71extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
72				    size_t size, enum dma_data_direction dir);
73
74extern void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
75				       size_t size,
76				       enum dma_data_direction dir);
77
78extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
79				int nents, enum dma_data_direction dir);
80
81extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
82				   int nents, enum dma_data_direction dir);
83
84extern void coherent_mem_init(u32 start, u32 size);
85extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);
86extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t);
87
88#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent((d), (s), (h), (f))
89#define dma_free_noncoherent(d, s, v, h)  dma_free_coherent((d), (s), (v), (h))
90
91#endif	/* _ASM_C6X_DMA_MAPPING_H */