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Viewing changes to buildroot/src/oem-audiosdw-lp1836324-0.6ubuntu1.2/include/dkms/sound/memalloc.h

  • Committer: Hui Wang
  • Date: 2019-12-13 02:41:40 UTC
  • Revision ID: hui.wang@canonical.com-20191213024140-1cprdcbl3122fn85
insert pc-oem-dkms

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buildroot/src/oem-audiosdw-lp1836324-0.6ubuntu1.2/include/dkms/sound/memalloc.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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 *                   Takashi Iwai <tiwai@suse.de>
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 * 
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 *  Generic memory allocators
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 */
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#ifndef __SOUND_MEMALLOC_H
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#define __SOUND_MEMALLOC_H
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#include <asm/page.h>
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struct device;
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/*
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 * buffer device info
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 */
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struct snd_dma_device {
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        int type;                       /* SNDRV_DMA_TYPE_XXX */
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        struct device *dev;             /* generic device */
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};
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#define snd_dma_continuous_data(x)      ((struct device *)(__force unsigned long)(x))
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/*
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 * buffer types
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 */
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#define SNDRV_DMA_TYPE_UNKNOWN          0       /* not defined */
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#define SNDRV_DMA_TYPE_CONTINUOUS       1       /* continuous no-DMA memory */
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#define SNDRV_DMA_TYPE_DEV              2       /* generic device continuous */
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#define SNDRV_DMA_TYPE_DEV_UC           5       /* continuous non-cahced */
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#ifdef CONFIG_SND_DMA_SGBUF
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#define SNDRV_DMA_TYPE_DEV_SG           3       /* generic device SG-buffer */
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#define SNDRV_DMA_TYPE_DEV_UC_SG        6       /* SG non-cached */
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#else
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#define SNDRV_DMA_TYPE_DEV_SG   SNDRV_DMA_TYPE_DEV /* no SG-buf support */
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#define SNDRV_DMA_TYPE_DEV_UC_SG        SNDRV_DMA_TYPE_DEV_UC
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#endif
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#ifdef CONFIG_GENERIC_ALLOCATOR
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#define SNDRV_DMA_TYPE_DEV_IRAM         4       /* generic device iram-buffer */
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#else
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#define SNDRV_DMA_TYPE_DEV_IRAM SNDRV_DMA_TYPE_DEV
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#endif
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#define SNDRV_DMA_TYPE_VMALLOC          7       /* vmalloc'ed buffer */
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/*
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 * info for buffer allocation
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 */
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struct snd_dma_buffer {
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        struct snd_dma_device dev;      /* device type */
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        unsigned char *area;    /* virtual pointer */
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        dma_addr_t addr;        /* physical address */
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        size_t bytes;           /* buffer size in bytes */
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        void *private_data;     /* private for allocator; don't touch */
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};
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/*
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 * return the pages matching with the given byte size
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 */
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static inline unsigned int snd_sgbuf_aligned_pages(size_t size)
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{
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        return (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
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}
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#ifdef CONFIG_SND_DMA_SGBUF
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/*
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 * Scatter-Gather generic device pages
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 */
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void *snd_malloc_sgbuf_pages(struct device *device,
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                             size_t size, struct snd_dma_buffer *dmab,
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                             size_t *res_size);
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int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab);
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struct snd_sg_page {
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        void *buf;
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        dma_addr_t addr;
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};
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struct snd_sg_buf {
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        int size;       /* allocated byte size */
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        int pages;      /* allocated pages */
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        int tblsize;    /* allocated table size */
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        struct snd_sg_page *table;      /* address table */
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        struct page **page_table;       /* page table (for vmap/vunmap) */
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        struct device *dev;
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};
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/*
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 * return the physical address at the corresponding offset
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 */
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static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab,
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                                           size_t offset)
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{
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        struct snd_sg_buf *sgbuf = dmab->private_data;
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        dma_addr_t addr = sgbuf->table[offset >> PAGE_SHIFT].addr;
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        addr &= ~((dma_addr_t)PAGE_SIZE - 1);
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        return addr + offset % PAGE_SIZE;
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}
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/*
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 * return the virtual address at the corresponding offset
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 */
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static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab,
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                                     size_t offset)
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{
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        struct snd_sg_buf *sgbuf = dmab->private_data;
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        return sgbuf->table[offset >> PAGE_SHIFT].buf + offset % PAGE_SIZE;
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}
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unsigned int snd_sgbuf_get_chunk_size(struct snd_dma_buffer *dmab,
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                                      unsigned int ofs, unsigned int size);
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#else
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/* non-SG versions */
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static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab,
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                                            size_t offset)
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{
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        return dmab->addr + offset;
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}
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static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab,
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                                      size_t offset)
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{
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        return dmab->area + offset;
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}
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#define snd_sgbuf_get_chunk_size(dmab, ofs, size)       (size)
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#endif /* CONFIG_SND_DMA_SGBUF */
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/* allocate/release a buffer */
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int snd_dma_alloc_pages(int type, struct device *dev, size_t size,
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                        struct snd_dma_buffer *dmab);
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int snd_dma_alloc_pages_fallback(int type, struct device *dev, size_t size,
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                                 struct snd_dma_buffer *dmab);
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void snd_dma_free_pages(struct snd_dma_buffer *dmab);
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#endif /* __SOUND_MEMALLOC_H */
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