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