Commit c32d977b authored by Takashi Iwai's avatar Takashi Iwai

ALSA: pcm - Call pgprot_noncached() for vmalloc'ed buffers

pgprot_noncached() can be set for vmalloc'ed buffers safely, and we'd
need non-cached behavior more or less, even for the intermediate ring-
buffers.

Now snd_pcm_lib_mmap_vmalloc() is added as the common PCM mmap callback
that is coupled with snd_pcm_lib_alloc_vmalloc_buffer() & co.
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3e879d7b
......@@ -1021,6 +1021,10 @@ int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_s
#define snd_pcm_lib_mmap_iomem NULL
#endif
int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
struct vm_area_struct *area);
#define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached
static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
{
*max = dma < 4 ? 64 * 1024 : 128 * 1024;
......
......@@ -3176,6 +3176,15 @@ int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
#endif /* SNDRV_PCM_INFO_MMAP */
/* mmap callback with pgprot_noncached */
int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
struct vm_area_struct *area)
{
area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
return snd_pcm_default_mmap(substream, area);
}
EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached);
/*
* mmap DMA buffer
*/
......
......@@ -905,6 +905,7 @@ static struct snd_pcm_ops vx_pcm_playback_ops = {
.trigger = vx_pcm_trigger,
.pointer = vx_pcm_playback_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
......@@ -1125,6 +1126,7 @@ static struct snd_pcm_ops vx_pcm_capture_ops = {
.trigger = vx_pcm_trigger,
.pointer = vx_pcm_capture_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
......
......@@ -691,6 +691,7 @@ static struct snd_pcm_ops snd_sgio2audio_playback1_ops = {
.trigger = snd_sgio2audio_pcm_trigger,
.pointer = snd_sgio2audio_pcm_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
static struct snd_pcm_ops snd_sgio2audio_playback2_ops = {
......@@ -703,6 +704,7 @@ static struct snd_pcm_ops snd_sgio2audio_playback2_ops = {
.trigger = snd_sgio2audio_pcm_trigger,
.pointer = snd_sgio2audio_pcm_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
static struct snd_pcm_ops snd_sgio2audio_capture_ops = {
......@@ -715,6 +717,7 @@ static struct snd_pcm_ops snd_sgio2audio_capture_ops = {
.trigger = snd_sgio2audio_pcm_trigger,
.pointer = snd_sgio2audio_pcm_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
/*
......
......@@ -277,6 +277,7 @@ static struct snd_pcm_ops pdacf_pcm_capture_ops = {
.trigger = pdacf_pcm_trigger,
.pointer = pdacf_pcm_capture_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
......
......@@ -911,6 +911,7 @@ static struct snd_pcm_ops capture_pcm_ops = {
.trigger = capture_pcm_trigger,
.pointer = capture_pcm_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
static struct snd_pcm_ops playback_pcm_ops = {
......@@ -923,6 +924,7 @@ static struct snd_pcm_ops playback_pcm_ops = {
.trigger = playback_pcm_trigger,
.pointer = playback_pcm_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
static const struct uac_format_type_i_discrete_descriptor *
......
......@@ -1997,6 +1997,7 @@ static struct snd_pcm_ops snd_usb_playback_ops = {
.trigger = snd_usb_pcm_playback_trigger,
.pointer = snd_usb_pcm_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
static struct snd_pcm_ops snd_usb_capture_ops = {
......@@ -2009,6 +2010,7 @@ static struct snd_pcm_ops snd_usb_capture_ops = {
.trigger = snd_usb_pcm_capture_trigger,
.pointer = snd_usb_pcm_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
......
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