ALSA: pcm: Introduce managed buffer allocation mode

[linux-2.6-block.git] / include / sound / pcm.h

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 2c0aa884f5f1188d724ba6f9a8df50bd1701ad45..253d15c61ce2c3811a01ec14ec47e56fb7ca09bb 100644 (file)
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -414,6 +414,7 @@ struct snd_pcm_runtime {
        size_t dma_bytes;               /* size of DMA area */
 
        struct snd_dma_buffer *dma_buffer_p;    /* allocated buffer */
+       unsigned int buffer_changed:1;  /* buffer allocation changed; set only in managed mode */
 
        /* -- audio timestamp config -- */
        struct snd_pcm_audio_tstamp_config audio_tstamp_config;
@@ -475,6 +476,7 @@ struct snd_pcm_substream {
 #endif /* CONFIG_SND_VERBOSE_PROCFS */
        /* misc flags */
        unsigned int hw_opened: 1;
+       unsigned int managed_buffer_alloc:1;
 };
 
 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
@@ -1186,6 +1188,12 @@ void snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
 
+void snd_pcm_set_managed_buffer(struct snd_pcm_substream *substream, int type,
+                               struct device *data, size_t size, size_t max);
+void snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type,
+                                   struct device *data,
+                                   size_t size, size_t max);
+
 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
                                      size_t size, gfp_t gfp_flags);
 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);