3  *  Digital Audio (PCM) abstract layer
15 #include <sound/pcm.h>
22 MODULE_PARM_DESC(preallocate_dma, "Preallocate DMA memory when the PCM devices are initialized.");
79 	struct snd_card *card = substream->pcm->card;  in preallocate_pcm_pages()
94 		substream->pcm->card->number, substream->pcm->device,  in preallocate_pcm_pages()
96 		substream->pcm->name, orig_size);  in preallocate_pcm_pages()
102  * @substream: the pcm substream instance
108 	do_free_pages(substream->pcm->card, &substream->dma_buffer);  in snd_pcm_lib_preallocate_free()
112  * snd_pcm_lib_preallocate_free_for_all - release all pre-allocated buffers on the pcm
113  * @pcm: the pcm instance
115  * Releases all the pre-allocated buffers on the given pcm.
117 void snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm)  in snd_pcm_lib_preallocate_free_for_all()  argument
122 	for_each_pcm_substream(pcm, stream, substream)  in snd_pcm_lib_preallocate_free_for_all()
161 	struct snd_card *card = substream->pcm->card;  in snd_pcm_lib_preallocate_proc_write()
166 	mutex_lock(&substream->pcm->open_mutex);  in snd_pcm_lib_preallocate_proc_write()
190 					 substream->pcm->card->number, substream->pcm->device,  in snd_pcm_lib_preallocate_proc_write()
192 					 substream->pcm->name, size);  in snd_pcm_lib_preallocate_proc_write()
206 	mutex_unlock(&substream->pcm->open_mutex);  in snd_pcm_lib_preallocate_proc_write()
213 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc",  in preallocate_info_init()
221 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc_max",  in preallocate_info_init()
273 static int preallocate_pages_for_all(struct snd_pcm *pcm, int type,  in preallocate_pages_for_all()  argument
280 	for_each_pcm_substream(pcm, stream, substream) {  in preallocate_pages_for_all()
290  * @substream: the pcm substream instance
308  * @pcm: the pcm instance
314  * Do pre-allocation to all substreams of the given pcm for the
317 void snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,  in snd_pcm_lib_preallocate_pages_for_all()  argument
321 	preallocate_pages_for_all(pcm, type, data, size, max, false);  in snd_pcm_lib_preallocate_pages_for_all()
327  * @substream: the pcm substream instance
335  * In this mode, PCM core will allocate a buffer automatically before PCM
336  * hw_params ops call, and release the buffer after PCM hw_free ops call
339  * When a buffer is actually allocated before the PCM hw_params call, it
366  * @pcm: the pcm instance
372  * Do pre-allocation to all substreams of the given pcm for the specified DMA
377 int snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type,  in snd_pcm_set_managed_buffer_all()  argument
381 	return preallocate_pages_for_all(pcm, type, data, size, max, true);  in snd_pcm_set_managed_buffer_all()
408 	card = substream->pcm->card;  in snd_pcm_lib_malloc_pages()
438 				 substream->pcm->card->number, substream->pcm->device,  in snd_pcm_lib_malloc_pages()
440 				 substream->pcm->name, size);  in snd_pcm_lib_malloc_pages()
468 		struct snd_card *card = substream->pcm->card;  in snd_pcm_lib_free_pages()
526  * This function is to be used as the page callback in the PCM ops.