141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/* 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_pci_data(pci) (&(pci)->dev)
|
|
#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
|
|
|
|
/*
|
|
* 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 */
|
|
|