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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/dma/coh901318_lli.h
2 * driver/dma/coh901318_lli.h
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>
10 #ifndef COH901318_LLI_H
11 #define COH901318_LLI_H
13 #include <mach/coh901318.h>
17 struct coh901318_pool
{
19 struct dma_pool
*dmapool
;
22 #ifdef CONFIG_DEBUG_FS
23 int debugfs_pool_counter
;
29 * coh901318_pool_create() - Creates an dma pool for lli:s
32 * @lli_nbr: number of lli:s in the pool
33 * @algin: address alignemtn of lli:s
34 * returns 0 on success otherwise none zero
36 int coh901318_pool_create(struct coh901318_pool
*pool
,
38 size_t lli_nbr
, size_t align
);
41 * coh901318_pool_destroy() - Destroys the dma pool
43 * returns 0 on success otherwise none zero
45 int coh901318_pool_destroy(struct coh901318_pool
*pool
);
48 * coh901318_lli_alloc() - Allocates a linked list
51 * @len: length to list
52 * return: none NULL if success otherwise NULL
54 struct coh901318_lli
*
55 coh901318_lli_alloc(struct coh901318_pool
*pool
,
59 * coh901318_lli_free() - Returns the linked list items to the pool
61 * @lli: reference to lli pointer to be freed
63 void coh901318_lli_free(struct coh901318_pool
*pool
,
64 struct coh901318_lli
**lli
);
67 * coh901318_lli_fill_memcpy() - Prepares the lli:s for dma memcpy
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.
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
);
84 * coh901318_lli_fill_single() - Prepares the lli:s for dma single transfer
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.
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
,
100 enum dma_data_direction dir
);
103 * coh901318_lli_fill_single() - Prepares the lli:s for dma scatter list transfer
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.
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
,
122 enum dma_data_direction dir
, u32 ctrl_irq_mask
);
124 #endif /* COH901318_LLI_H */