Thomas Gleixner | 1a59d1b8 | 2019-05-27 08:55:05 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Takashi Iwai <tiwai@suse.de> |
| 5 | * |
| 6 | * Generic memory allocators |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #ifndef __SOUND_MEMALLOC_H |
| 10 | #define __SOUND_MEMALLOC_H |
| 11 | |
Takashi Iwai | 345a9ca | 2018-07-30 08:46:40 +0200 | [diff] [blame] | 12 | #include <asm/page.h> |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | struct device; |
| 15 | |
| 16 | /* |
| 17 | * buffer device info |
| 18 | */ |
| 19 | struct snd_dma_device { |
| 20 | int type; /* SNDRV_DMA_TYPE_XXX */ |
| 21 | struct device *dev; /* generic device */ |
| 22 | }; |
| 23 | |
Antonio Ospite | 019d80d | 2013-01-29 12:56:26 +0100 | [diff] [blame] | 24 | #define snd_dma_continuous_data(x) ((struct device *)(__force unsigned long)(x)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
| 26 | |
| 27 | /* |
| 28 | * buffer types |
| 29 | */ |
| 30 | #define SNDRV_DMA_TYPE_UNKNOWN 0 /* not defined */ |
| 31 | #define SNDRV_DMA_TYPE_CONTINUOUS 1 /* continuous no-DMA memory */ |
| 32 | #define SNDRV_DMA_TYPE_DEV 2 /* generic device continuous */ |
Takashi Iwai | 42e748a | 2018-08-08 17:01:00 +0200 | [diff] [blame] | 33 | #define SNDRV_DMA_TYPE_DEV_UC 5 /* continuous non-cahced */ |
Takashi Iwai | cc6a8ac | 2008-06-17 16:39:06 +0200 | [diff] [blame] | 34 | #ifdef CONFIG_SND_DMA_SGBUF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #define SNDRV_DMA_TYPE_DEV_SG 3 /* generic device SG-buffer */ |
Takashi Iwai | 42e748a | 2018-08-08 17:01:00 +0200 | [diff] [blame] | 36 | #define SNDRV_DMA_TYPE_DEV_UC_SG 6 /* SG non-cached */ |
Takashi Iwai | cc6a8ac | 2008-06-17 16:39:06 +0200 | [diff] [blame] | 37 | #else |
| 38 | #define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_DEV /* no SG-buf support */ |
Takashi Iwai | 42e748a | 2018-08-08 17:01:00 +0200 | [diff] [blame] | 39 | #define SNDRV_DMA_TYPE_DEV_UC_SG SNDRV_DMA_TYPE_DEV_UC |
Takashi Iwai | cc6a8ac | 2008-06-17 16:39:06 +0200 | [diff] [blame] | 40 | #endif |
Takashi Iwai | a5606f8 | 2013-10-24 14:25:32 +0200 | [diff] [blame] | 41 | #ifdef CONFIG_GENERIC_ALLOCATOR |
Nicolin Chen | 0550321 | 2013-10-23 11:47:43 +0800 | [diff] [blame] | 42 | #define SNDRV_DMA_TYPE_DEV_IRAM 4 /* generic device iram-buffer */ |
Takashi Iwai | a5606f8 | 2013-10-24 14:25:32 +0200 | [diff] [blame] | 43 | #else |
| 44 | #define SNDRV_DMA_TYPE_DEV_IRAM SNDRV_DMA_TYPE_DEV |
| 45 | #endif |
Takashi Iwai | 1fe7f39 | 2019-11-05 09:01:36 +0100 | [diff] [blame] | 46 | #define SNDRV_DMA_TYPE_VMALLOC 7 /* vmalloc'ed buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | /* |
| 49 | * info for buffer allocation |
| 50 | */ |
| 51 | struct snd_dma_buffer { |
| 52 | struct snd_dma_device dev; /* device type */ |
| 53 | unsigned char *area; /* virtual pointer */ |
| 54 | dma_addr_t addr; /* physical address */ |
| 55 | size_t bytes; /* buffer size in bytes */ |
| 56 | void *private_data; /* private for allocator; don't touch */ |
| 57 | }; |
| 58 | |
Pierre-Louis Bossart | 4cae99d | 2018-07-25 15:15:56 -0500 | [diff] [blame] | 59 | /* |
| 60 | * return the pages matching with the given byte size |
| 61 | */ |
| 62 | static inline unsigned int snd_sgbuf_aligned_pages(size_t size) |
| 63 | { |
| 64 | return (size + PAGE_SIZE - 1) >> PAGE_SHIFT; |
| 65 | } |
| 66 | |
Takashi Iwai | cc6a8ac | 2008-06-17 16:39:06 +0200 | [diff] [blame] | 67 | #ifdef CONFIG_SND_DMA_SGBUF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | /* |
| 69 | * Scatter-Gather generic device pages |
| 70 | */ |
Takashi Iwai | 77a23f2 | 2008-08-21 13:00:13 +0200 | [diff] [blame] | 71 | void *snd_malloc_sgbuf_pages(struct device *device, |
| 72 | size_t size, struct snd_dma_buffer *dmab, |
| 73 | size_t *res_size); |
| 74 | int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab); |
| 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | struct snd_sg_page { |
| 77 | void *buf; |
| 78 | dma_addr_t addr; |
| 79 | }; |
| 80 | |
| 81 | struct snd_sg_buf { |
| 82 | int size; /* allocated byte size */ |
| 83 | int pages; /* allocated pages */ |
| 84 | int tblsize; /* allocated table size */ |
| 85 | struct snd_sg_page *table; /* address table */ |
| 86 | struct page **page_table; /* page table (for vmap/vunmap) */ |
| 87 | struct device *dev; |
| 88 | }; |
| 89 | |
| 90 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | * return the physical address at the corresponding offset |
| 92 | */ |
Takashi Iwai | 9d069dc | 2012-09-20 20:29:12 -0700 | [diff] [blame] | 93 | static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab, |
| 94 | size_t offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | { |
Takashi Iwai | 9d069dc | 2012-09-20 20:29:12 -0700 | [diff] [blame] | 96 | struct snd_sg_buf *sgbuf = dmab->private_data; |
Takashi Iwai | 2a1f336 | 2020-06-15 18:00:44 +0200 | [diff] [blame] | 97 | dma_addr_t addr; |
| 98 | |
| 99 | if (!sgbuf) |
| 100 | return dmab->addr + offset; |
| 101 | addr = sgbuf->table[offset >> PAGE_SHIFT].addr; |
Stefano Panella | 932e9de | 2013-12-10 14:20:28 +0000 | [diff] [blame] | 102 | addr &= ~((dma_addr_t)PAGE_SIZE - 1); |
Takashi Iwai | 51e9f2e | 2008-07-30 15:13:33 +0200 | [diff] [blame] | 103 | return addr + offset % PAGE_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | } |
| 105 | |
Takashi Iwai | 77a23f2 | 2008-08-21 13:00:13 +0200 | [diff] [blame] | 106 | /* |
| 107 | * return the virtual address at the corresponding offset |
| 108 | */ |
Takashi Iwai | 9d069dc | 2012-09-20 20:29:12 -0700 | [diff] [blame] | 109 | static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab, |
| 110 | size_t offset) |
Takashi Iwai | 77a23f2 | 2008-08-21 13:00:13 +0200 | [diff] [blame] | 111 | { |
Takashi Iwai | 9d069dc | 2012-09-20 20:29:12 -0700 | [diff] [blame] | 112 | struct snd_sg_buf *sgbuf = dmab->private_data; |
Takashi Iwai | 2a1f336 | 2020-06-15 18:00:44 +0200 | [diff] [blame] | 113 | |
| 114 | if (!sgbuf) |
| 115 | return dmab->area + offset; |
Takashi Iwai | 77a23f2 | 2008-08-21 13:00:13 +0200 | [diff] [blame] | 116 | return sgbuf->table[offset >> PAGE_SHIFT].buf + offset % PAGE_SIZE; |
| 117 | } |
Takashi Iwai | 9d069dc | 2012-09-20 20:29:12 -0700 | [diff] [blame] | 118 | |
| 119 | unsigned int snd_sgbuf_get_chunk_size(struct snd_dma_buffer *dmab, |
| 120 | unsigned int ofs, unsigned int size); |
| 121 | #else |
| 122 | /* non-SG versions */ |
| 123 | static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab, |
| 124 | size_t offset) |
| 125 | { |
| 126 | return dmab->addr + offset; |
| 127 | } |
| 128 | |
| 129 | static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab, |
| 130 | size_t offset) |
| 131 | { |
| 132 | return dmab->area + offset; |
| 133 | } |
| 134 | |
| 135 | #define snd_sgbuf_get_chunk_size(dmab, ofs, size) (size) |
| 136 | |
Takashi Iwai | cc6a8ac | 2008-06-17 16:39:06 +0200 | [diff] [blame] | 137 | #endif /* CONFIG_SND_DMA_SGBUF */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | /* allocate/release a buffer */ |
| 140 | int snd_dma_alloc_pages(int type, struct device *dev, size_t size, |
| 141 | struct snd_dma_buffer *dmab); |
| 142 | int snd_dma_alloc_pages_fallback(int type, struct device *dev, size_t size, |
| 143 | struct snd_dma_buffer *dmab); |
| 144 | void snd_dma_free_pages(struct snd_dma_buffer *dmab); |
| 145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | #endif /* __SOUND_MEMALLOC_H */ |
| 147 | |