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
dma_set_mask(struct device * dev,u64 dma_mask)20 static 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 */
dma_mapping_error(struct device * dev,dma_addr_t dma_addr)33 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
34 {
35 debug_dma_mapping_error(dev, dma_addr);
36 return dma_addr == ~0;
37 }
38
39 extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
40 size_t size, enum dma_data_direction dir);
41
42 extern void dma_unmap_single(struct device *dev, dma_addr_t handle,
43 size_t size, enum dma_data_direction dir);
44
45 extern int dma_map_sg(struct device *dev, struct scatterlist *sglist,
46 int nents, enum dma_data_direction direction);
47
48 extern void dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
49 int nents, enum dma_data_direction direction);
50
dma_map_page(struct device * dev,struct page * page,unsigned long offset,size_t size,enum dma_data_direction dir)51 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
52 unsigned long offset, size_t size,
53 enum dma_data_direction dir)
54 {
55 dma_addr_t handle;
56
57 handle = dma_map_single(dev, page_address(page) + offset, size, dir);
58
59 debug_dma_map_page(dev, page, offset, size, dir, handle, false);
60
61 return handle;
62 }
63
dma_unmap_page(struct device * dev,dma_addr_t handle,size_t size,enum dma_data_direction dir)64 static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
65 size_t size, enum dma_data_direction dir)
66 {
67 dma_unmap_single(dev, handle, size, dir);
68
69 debug_dma_unmap_page(dev, handle, size, dir, false);
70 }
71
72 extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
73 size_t size, enum dma_data_direction dir);
74
75 extern void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
76 size_t size,
77 enum dma_data_direction dir);
78
79 extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
80 int nents, enum dma_data_direction dir);
81
82 extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
83 int nents, enum dma_data_direction dir);
84
85 extern void coherent_mem_init(u32 start, u32 size);
86 extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);
87 extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t);
88
89 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent((d), (s), (h), (f))
90 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent((d), (s), (v), (h))
91
92 /* Not supported for now */
dma_mmap_coherent(struct device * dev,struct vm_area_struct * vma,void * cpu_addr,dma_addr_t dma_addr,size_t size)93 static inline int dma_mmap_coherent(struct device *dev,
94 struct vm_area_struct *vma, void *cpu_addr,
95 dma_addr_t dma_addr, size_t size)
96 {
97 return -EINVAL;
98 }
99
dma_get_sgtable(struct device * dev,struct sg_table * sgt,void * cpu_addr,dma_addr_t dma_addr,size_t size)100 static inline int dma_get_sgtable(struct device *dev, struct sg_table *sgt,
101 void *cpu_addr, dma_addr_t dma_addr,
102 size_t size)
103 {
104 return -EINVAL;
105 }
106
107 #endif /* _ASM_C6X_DMA_MAPPING_H */
108