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ALSA: usb-audio: Convert to the common vmalloc memalloc 

The recent change (*) in the ALSA memalloc core allows us to drop the
special vmalloc-specific allocation and page handling.  This patch
coverts to the common code.
(*) 1fe7f397cfe2: ALSA: memalloc: Add vmalloc buffer allocation
                  support
    7e8edae39fd1: ALSA: pcm: Handle special page mapping in the
                  default mmap handler

Also, since the SG-buffer-specific PCM ops becomes identical with the
normal PCM ops, unify them again to the single ops, too.

Link: https://lore.kernel.org/r/20191105151856.10785-9-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2019-11-05 16:18:40 +01:00
parent 1158e89c9d
commit b315997d7c
1 changed files with 8 additions and 42 deletions
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50
sound/usb/pcm.c
View File

@ -785,12 +785,8 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
if (ret)
return ret;
if (snd_usb_use_vmalloc)
ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
params_buffer_bytes(hw_params));
else
ret = snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
ret = snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
if (ret < 0)
goto stop_pipeline;
@ -857,10 +853,7 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream)
snd_usb_unlock_shutdown(subs->stream->chip);
}
if (snd_usb_use_vmalloc)
return snd_pcm_lib_free_vmalloc_buffer(substream);
else
return snd_pcm_lib_free_pages(substream);
return snd_pcm_lib_free_pages(substream);
}
/*
@ -1781,7 +1774,6 @@ static const struct snd_pcm_ops snd_usb_playback_ops = {
.prepare = snd_usb_pcm_prepare,
.trigger = snd_usb_substream_playback_trigger,
.pointer = snd_usb_pcm_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
};
static const struct snd_pcm_ops snd_usb_capture_ops = {
@ -1793,43 +1785,14 @@ static const struct snd_pcm_ops snd_usb_capture_ops = {
.prepare = snd_usb_pcm_prepare,
.trigger = snd_usb_substream_capture_trigger,
.pointer = snd_usb_pcm_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
};
static const struct snd_pcm_ops snd_usb_playback_dev_ops = {
.open = snd_usb_pcm_open,
.close = snd_usb_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_usb_hw_params,
.hw_free = snd_usb_hw_free,
.prepare = snd_usb_pcm_prepare,
.trigger = snd_usb_substream_playback_trigger,
.pointer = snd_usb_pcm_pointer,
.page = snd_pcm_sgbuf_ops_page,
};
static const struct snd_pcm_ops snd_usb_capture_dev_ops = {
.open = snd_usb_pcm_open,
.close = snd_usb_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_usb_hw_params,
.hw_free = snd_usb_hw_free,
.prepare = snd_usb_pcm_prepare,
.trigger = snd_usb_substream_capture_trigger,
.pointer = snd_usb_pcm_pointer,
.page = snd_pcm_sgbuf_ops_page,
};
void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
{
const struct snd_pcm_ops *ops;
if (snd_usb_use_vmalloc)
ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
&snd_usb_playback_ops : &snd_usb_capture_ops;
else
ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
&snd_usb_playback_dev_ops : &snd_usb_capture_dev_ops;
snd_pcm_set_ops(pcm, stream, ops);
}
@ -1839,7 +1802,10 @@ void snd_usb_preallocate_buffer(struct snd_usb_substream *subs)
struct snd_pcm_substream *s = pcm->streams[subs->direction].substream;
struct device *dev = subs->dev->bus->controller;
if (!snd_usb_use_vmalloc)
if (snd_usb_use_vmalloc)
snd_pcm_lib_preallocate_pages(s, SNDRV_DMA_TYPE_VMALLOC,
NULL, 0, 0);
else
snd_pcm_lib_preallocate_pages(s, SNDRV_DMA_TYPE_DEV_SG,
dev, 64*1024, 512*1024);
}