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ALSA: core: Move mmap handler into memalloc ops

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This patch moves the mmap handling code into the common memalloc
handler.  It allows us to reduce the memory-type specific code in PCM
code gracefully.

Link: https://lore.kernel.org/r/20210609162551.7842-5-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2021-06-09 18:25:50 +02:00
parent 37af81c599
commit a202bd1ad8
4 changed files with 43 additions and 16 deletions
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3
include/sound/memalloc.h
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@@ -11,6 +11,7 @@
struct device;
struct page;
struct vm_area_struct;
/*
* buffer device info
@@ -69,6 +70,8 @@ int snd_dma_alloc_pages(int type, struct device *dev, size_t size,
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);
int snd_dma_buffer_mmap(struct snd_dma_buffer *dmab,
struct vm_area_struct *area);
dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab, size_t offset);
struct page *snd_sgbuf_get_page(struct snd_dma_buffer *dmab, size_t offset);