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1 | /* |
2 | * driver/dma/coh901318_lli.h | |
3 | * | |
4 | * Copyright (C) 2007-2009 ST-Ericsson | |
5 | * License terms: GNU General Public License (GPL) version 2 | |
6 | * Support functions for handling lli for coh901318 | |
7 | * Author: Per Friden <per.friden@stericsson.com> | |
8 | */ | |
9 | ||
10 | #ifndef COH901318_LLI_H | |
11 | #define COH901318_LLI_H | |
12 | ||
13 | #include <mach/coh901318.h> | |
14 | ||
15 | struct device; | |
16 | ||
17 | struct coh901318_pool { | |
18 | spinlock_t lock; | |
19 | struct dma_pool *dmapool; | |
20 | struct device *dev; | |
21 | ||
22 | #ifdef CONFIG_DEBUG_FS | |
23 | int debugfs_pool_counter; | |
24 | #endif | |
25 | }; | |
26 | ||
27 | struct device; | |
28 | /** | |
29 | * coh901318_pool_create() - Creates an dma pool for lli:s | |
30 | * @pool: pool handle | |
31 | * @dev: dma device | |
32 | * @lli_nbr: number of lli:s in the pool | |
3ad2f3fb | 33 | * @algin: address alignemtn of lli:s |
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34 | * returns 0 on success otherwise none zero |
35 | */ | |
36 | int coh901318_pool_create(struct coh901318_pool *pool, | |
37 | struct device *dev, | |
38 | size_t lli_nbr, size_t align); | |
39 | ||
40 | /** | |
41 | * coh901318_pool_destroy() - Destroys the dma pool | |
42 | * @pool: pool handle | |
43 | * returns 0 on success otherwise none zero | |
44 | */ | |
45 | int coh901318_pool_destroy(struct coh901318_pool *pool); | |
46 | ||
47 | /** | |
48 | * coh901318_lli_alloc() - Allocates a linked list | |
49 | * | |
50 | * @pool: pool handle | |
51 | * @len: length to list | |
52 | * return: none NULL if success otherwise NULL | |
53 | */ | |
54 | struct coh901318_lli * | |
55 | coh901318_lli_alloc(struct coh901318_pool *pool, | |
56 | unsigned int len); | |
57 | ||
58 | /** | |
59 | * coh901318_lli_free() - Returns the linked list items to the pool | |
60 | * @pool: pool handle | |
61 | * @lli: reference to lli pointer to be freed | |
62 | */ | |
63 | void coh901318_lli_free(struct coh901318_pool *pool, | |
64 | struct coh901318_lli **lli); | |
65 | ||
66 | /** | |
67 | * coh901318_lli_fill_memcpy() - Prepares the lli:s for dma memcpy | |
68 | * @pool: pool handle | |
69 | * @lli: allocated lli | |
70 | * @src: src address | |
71 | * @size: transfer size | |
72 | * @dst: destination address | |
73 | * @ctrl_chained: ctrl for chained lli | |
74 | * @ctrl_last: ctrl for the last lli | |
75 | * returns number of CPU interrupts for the lli, negative on error. | |
76 | */ | |
77 | int | |
78 | coh901318_lli_fill_memcpy(struct coh901318_pool *pool, | |
79 | struct coh901318_lli *lli, | |
80 | dma_addr_t src, unsigned int size, | |
81 | dma_addr_t dst, u32 ctrl_chained, u32 ctrl_last); | |
82 | ||
83 | /** | |
84 | * coh901318_lli_fill_single() - Prepares the lli:s for dma single transfer | |
85 | * @pool: pool handle | |
86 | * @lli: allocated lli | |
87 | * @buf: transfer buffer | |
88 | * @size: transfer size | |
89 | * @dev_addr: address of periphal | |
90 | * @ctrl_chained: ctrl for chained lli | |
91 | * @ctrl_last: ctrl for the last lli | |
92 | * @dir: direction of transfer (to or from device) | |
93 | * returns number of CPU interrupts for the lli, negative on error. | |
94 | */ | |
95 | int | |
96 | coh901318_lli_fill_single(struct coh901318_pool *pool, | |
97 | struct coh901318_lli *lli, | |
98 | dma_addr_t buf, unsigned int size, | |
99 | dma_addr_t dev_addr, u32 ctrl_chained, u32 ctrl_last, | |
db8196df | 100 | enum dma_transfer_direction dir); |
61f135b9 LW |
101 | |
102 | /** | |
103 | * coh901318_lli_fill_single() - Prepares the lli:s for dma scatter list transfer | |
104 | * @pool: pool handle | |
105 | * @lli: allocated lli | |
106 | * @sg: scatter gather list | |
107 | * @nents: number of entries in sg | |
108 | * @dev_addr: address of periphal | |
109 | * @ctrl_chained: ctrl for chained lli | |
110 | * @ctrl: ctrl of middle lli | |
111 | * @ctrl_last: ctrl for the last lli | |
112 | * @dir: direction of transfer (to or from device) | |
113 | * @ctrl_irq_mask: ctrl mask for CPU interrupt | |
114 | * returns number of CPU interrupts for the lli, negative on error. | |
115 | */ | |
116 | int | |
117 | coh901318_lli_fill_sg(struct coh901318_pool *pool, | |
118 | struct coh901318_lli *lli, | |
119 | struct scatterlist *sg, unsigned int nents, | |
120 | dma_addr_t dev_addr, u32 ctrl_chained, | |
121 | u32 ctrl, u32 ctrl_last, | |
db8196df | 122 | enum dma_transfer_direction dir, u32 ctrl_irq_mask); |
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123 | |
124 | #endif /* COH901318_LLI_H */ |