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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 |
| 33 | * @algin: address alignemtn of lli:s |
| 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, |
| 100 | enum dma_transfer_direction dir); |
| 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, |
| 122 | enum dma_transfer_direction dir, u32 ctrl_irq_mask); |
| 123 | |
| 124 | #endif /* COH901318_LLI_H */ |
| 125 |
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