diff options
Diffstat (limited to 'sound/usb/usbaudio.c')
| -rw-r--r-- | sound/usb/usbaudio.c | 53 |
1 files changed, 44 insertions, 9 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index 13ff66b0a53..5aa5fe651a8 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -46,6 +46,7 @@ #include <linux/slab.h> #include <linux/string.h> #include <linux/usb.h> +#include <linux/vmalloc.h> #include <linux/moduleparam.h> #include <sound/core.h> #include <sound/info.h> @@ -676,6 +677,42 @@ static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs) } +/* get the physical page pointer at the given offset */ +static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs, + unsigned long offset) +{ + void *pageptr = subs->runtime->dma_area + offset; + return vmalloc_to_page(pageptr); +} + +/* allocate virtual buffer; may be called more than once */ +static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size) +{ + snd_pcm_runtime_t *runtime = subs->runtime; + if (runtime->dma_area) { + if (runtime->dma_bytes >= size) + return 0; /* already large enough */ + vfree_nocheck(runtime->dma_area); + } + runtime->dma_area = vmalloc_nocheck(size); + if (! runtime->dma_area) + return -ENOMEM; + runtime->dma_bytes = size; + return 0; +} + +/* free virtual buffer; may be called more than once */ +static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs) +{ + snd_pcm_runtime_t *runtime = subs->runtime; + if (runtime->dma_area) { + vfree_nocheck(runtime->dma_area); + runtime->dma_area = NULL; + } + return 0; +} + + /* * unlink active urbs. */ @@ -1311,7 +1348,8 @@ static int snd_usb_hw_params(snd_pcm_substream_t *substream, unsigned int channels, rate, format; int ret, changed; - ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); + ret = snd_pcm_alloc_vmalloc_buffer(substream, + params_buffer_bytes(hw_params)); if (ret < 0) return ret; @@ -1367,7 +1405,7 @@ static int snd_usb_hw_free(snd_pcm_substream_t *substream) subs->cur_rate = 0; subs->period_bytes = 0; release_substream_urbs(subs, 0); - return snd_pcm_lib_free_pages(substream); + return snd_pcm_free_vmalloc_buffer(substream); } /* @@ -1406,7 +1444,7 @@ static snd_pcm_hardware_t snd_usb_playback = .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID), - .buffer_bytes_max = (128*1024), + .buffer_bytes_max = (256*1024), .period_bytes_min = 64, .period_bytes_max = (128*1024), .periods_min = 2, @@ -1418,7 +1456,7 @@ static snd_pcm_hardware_t snd_usb_capture = .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID), - .buffer_bytes_max = (128*1024), + .buffer_bytes_max = (256*1024), .period_bytes_min = 64, .period_bytes_max = (128*1024), .periods_min = 2, @@ -1810,6 +1848,7 @@ static snd_pcm_ops_t snd_usb_playback_ops = { .prepare = snd_usb_pcm_prepare, .trigger = snd_usb_pcm_trigger, .pointer = snd_usb_pcm_pointer, + .page = snd_pcm_get_vmalloc_page, }; static snd_pcm_ops_t snd_usb_capture_ops = { @@ -1821,6 +1860,7 @@ static snd_pcm_ops_t snd_usb_capture_ops = { .prepare = snd_usb_pcm_prepare, .trigger = snd_usb_pcm_trigger, .pointer = snd_usb_pcm_pointer, + .page = snd_pcm_get_vmalloc_page, }; @@ -2048,10 +2088,6 @@ static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat subs->ops = audio_urb_ops[stream]; else subs->ops = audio_urb_ops_high_speed[stream]; - snd_pcm_lib_preallocate_pages(as->pcm->streams[stream].substream, - SNDRV_DMA_TYPE_CONTINUOUS, - snd_dma_continuous_data(GFP_NOIO), - 64 * 1024, 128 * 1024); snd_pcm_set_ops(as->pcm, stream, stream == SNDRV_PCM_STREAM_PLAYBACK ? &snd_usb_playback_ops : &snd_usb_capture_ops); @@ -2097,7 +2133,6 @@ static void snd_usb_audio_pcm_free(snd_pcm_t *pcm) snd_usb_stream_t *stream = pcm->private_data; if (stream) { stream->pcm = NULL; - snd_pcm_lib_preallocate_free_for_all(pcm); snd_usb_audio_stream_free(stream); } } |