Release 4.7 include/sound/memalloc.h
/*
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* Takashi Iwai <tiwai@suse.de>
*
* Generic memory allocators
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __SOUND_MEMALLOC_H
#define __SOUND_MEMALLOC_H
struct device;
/*
* buffer device info
*/
struct snd_dma_device {
int type; /* SNDRV_DMA_TYPE_XXX */
struct device *dev; /* generic device */
};
#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
/*
* 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 */
#ifdef CONFIG_SND_DMA_SGBUF
#define SNDRV_DMA_TYPE_DEV_SG 3
/* generic device SG-buffer */
#else
#define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_DEV
/* no SG-buf support */
#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 */
};
#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 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jaroslav kysela | jaroslav kysela | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
/*
* 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jaroslav kysela | jaroslav kysela | 28 | 49.12% | 1 | 25.00% |
| takashi iwai | takashi iwai | 20 | 35.09% | 2 | 50.00% |
| stefano panella | stefano panella | 9 | 15.79% | 1 | 25.00% |
| Total | 57 | 100.00% | 4 | 100.00% |
/*
* 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| takashi iwai | takashi iwai | 35 | 85.37% | 2 | 66.67% |
| jaroslav kysela | jaroslav kysela | 6 | 14.63% | 1 | 33.33% |
| Total | 41 | 100.00% | 3 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| takashi iwai | takashi iwai | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab,
size_t offset)
{
return dmab->area + offset;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| takashi iwai | takashi iwai | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
#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);
/* basic memory allocation functions */
void *snd_malloc_pages(size_t size, gfp_t gfp_flags);
void snd_free_pages(void *ptr, size_t size);
#endif /* __SOUND_MEMALLOC_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jaroslav kysela | jaroslav kysela | 281 | 57.35% | 5 | 35.71% |
| takashi iwai | takashi iwai | 193 | 39.39% | 5 | 35.71% |
| stefano panella | stefano panella | 9 | 1.84% | 1 | 7.14% |
| nicolin chen | nicolin chen | 5 | 1.02% | 1 | 7.14% |
| al viro | al viro | 1 | 0.20% | 1 | 7.14% |
| antonio ospite | antonio ospite | 1 | 0.20% | 1 | 7.14% |
| Total | 490 | 100.00% | 14 | 100.00% |
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