This source file includes following definitions.
- snd_sgbuf_aligned_pages
- snd_sgbuf_get_addr
- snd_sgbuf_get_ptr
- snd_sgbuf_get_addr
- snd_sgbuf_get_ptr
#ifndef __SOUND_MEMALLOC_H
#define __SOUND_MEMALLOC_H
struct device;
struct snd_dma_device {
int type;
struct device *dev;
};
#ifndef snd_dma_pci_data
#define snd_dma_pci_data(pci) (&(pci)->dev)
#define snd_dma_isa_data() NULL
#define snd_dma_continuous_data(x) ((struct device *)(__force unsigned long)(x))
#endif
#define SNDRV_DMA_TYPE_UNKNOWN 0
#define SNDRV_DMA_TYPE_CONTINUOUS 1
#define SNDRV_DMA_TYPE_DEV 2
#ifdef CONFIG_SND_DMA_SGBUF
#define SNDRV_DMA_TYPE_DEV_SG 3
#else
#define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_DEV
#endif
#ifdef CONFIG_GENERIC_ALLOCATOR
#define SNDRV_DMA_TYPE_DEV_IRAM 4
#else
#define SNDRV_DMA_TYPE_DEV_IRAM SNDRV_DMA_TYPE_DEV
#endif
struct snd_dma_buffer {
struct snd_dma_device dev;
unsigned char *area;
dma_addr_t addr;
size_t bytes;
void *private_data;
};
#ifdef CONFIG_SND_DMA_SGBUF
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;
int pages;
int tblsize;
struct snd_sg_page *table;
struct page **page_table;
struct device *dev;
};
static inline unsigned int snd_sgbuf_aligned_pages(size_t size)
{
return (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
}
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;
}
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
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
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);
void *snd_malloc_pages(size_t size, gfp_t gfp_flags);
void snd_free_pages(void *ptr, size_t size);
#endif