diff options
| author | Takashi Iwai <tiwai@suse.de> | 2021-08-02 10:28:04 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-08-04 09:08:14 +0300 |
| commit | d5c5055816740bd26f3c0095e7f5e63dfa4bbdf8 (patch) | |
| tree | f35c136323d52bf453f8843e8820d955b1b40634 /sound/core | |
| parent | ac9245a5406e6074a1aa211f103629d3f154c5a5 (diff) | |
| download | linux-d5c5055816740bd26f3c0095e7f5e63dfa4bbdf8.tar.xz | |
ALSA: memalloc: Support WC allocation on all architectures
There are the generic DMA API calls for allocating and managing the
pages with the write-combined attribute. Let's use them for all
architectures but x86; x86 still needs the special handling to
override the page attributes.
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210802072815.13551-5-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/memalloc.c | 46 |
1 files changed, 39 insertions, 7 deletions
diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c index 5897d256b70d..58bab2cfdb87 100644 --- a/sound/core/memalloc.c +++ b/sound/core/memalloc.c @@ -373,19 +373,20 @@ static const struct snd_malloc_ops snd_dma_iram_ops = { }; #endif /* CONFIG_GENERIC_ALLOCATOR */ +#define DEFAULT_GFP \ + (GFP_KERNEL | \ + __GFP_COMP | /* compound page lets parts be mapped */ \ + __GFP_NORETRY | /* don't trigger OOM-killer */ \ + __GFP_NOWARN) /* no stack trace print - this call is non-critical */ + /* * Coherent device pages allocator */ static void *snd_dma_dev_alloc(struct snd_dma_buffer *dmab, size_t size) { - gfp_t gfp_flags; void *p; - gfp_flags = GFP_KERNEL - | __GFP_COMP /* compound page lets parts be mapped */ - | __GFP_NORETRY /* don't trigger OOM-killer */ - | __GFP_NOWARN; /* no stack trace print - this call is non-critical */ - p = dma_alloc_coherent(dmab->dev.dev, size, &dmab->addr, gfp_flags); + p = dma_alloc_coherent(dmab->dev.dev, size, &dmab->addr, DEFAULT_GFP); #ifdef CONFIG_X86 if (p && dmab->dev.type == SNDRV_DMA_TYPE_DEV_WC) set_memory_wc((unsigned long)p, PAGE_ALIGN(size) >> PAGE_SHIFT); @@ -415,6 +416,37 @@ static const struct snd_malloc_ops snd_dma_dev_ops = { .free = snd_dma_dev_free, .mmap = snd_dma_dev_mmap, }; + +/* + * Write-combined pages + */ +#ifdef CONFIG_X86 +/* On x86, share the same ops as the standard dev ops */ +#define snd_dma_wc_ops snd_dma_dev_ops +#else /* CONFIG_X86 */ +static void *snd_dma_wc_alloc(struct snd_dma_buffer *dmab, size_t size) +{ + return dma_alloc_wc(dmab->dev.dev, size, &dmab->addr, DEFAULT_GFP); +} + +static void snd_dma_wc_free(struct snd_dma_buffer *dmab) +{ + dma_free_wc(dmab->dev.dev, dmab->bytes, dmab->area, dmab->addr); +} + +static int snd_dma_wc_mmap(struct snd_dma_buffer *dmab, + struct vm_area_struct *area) +{ + return dma_mmap_wc(dmab->dev.dev, area, + dmab->area, dmab->addr, dmab->bytes); +} + +static const struct snd_malloc_ops snd_dma_wc_ops = { + .alloc = snd_dma_wc_alloc, + .free = snd_dma_wc_free, + .mmap = snd_dma_wc_mmap, +}; +#endif /* CONFIG_X86 */ #endif /* CONFIG_HAS_DMA */ /* @@ -425,7 +457,7 @@ static const struct snd_malloc_ops *dma_ops[] = { [SNDRV_DMA_TYPE_VMALLOC] = &snd_dma_vmalloc_ops, #ifdef CONFIG_HAS_DMA [SNDRV_DMA_TYPE_DEV] = &snd_dma_dev_ops, - [SNDRV_DMA_TYPE_DEV_WC] = &snd_dma_dev_ops, + [SNDRV_DMA_TYPE_DEV_WC] = &snd_dma_wc_ops, #ifdef CONFIG_GENERIC_ALLOCATOR [SNDRV_DMA_TYPE_DEV_IRAM] = &snd_dma_iram_ops, #endif /* CONFIG_GENERIC_ALLOCATOR */ |