3  *  Digital Audio (PCM) abstract layer
14 #include <sound/pcm.h>
21 MODULE_PARM_DESC(preallocate_dma, "Preallocate DMA memory when the PCM devices are initialized.");
102 	struct snd_card *card = substream->pcm->card;  in preallocate_pcm_pages()
117 		substream->pcm->card->number, substream->pcm->device,  in preallocate_pcm_pages()
119 		substream->pcm->name, orig_size);  in preallocate_pcm_pages()
125  * @substream: the pcm substream instance
131 	do_free_pages(substream->pcm->card, &substream->dma_buffer);  in snd_pcm_lib_preallocate_free()
135  * snd_pcm_lib_preallocate_free_for_all - release all pre-allocated buffers on the pcm
136  * @pcm: the pcm instance
138  * Releases all the pre-allocated buffers on the given pcm.
140 void snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm)  in snd_pcm_lib_preallocate_free_for_all()  argument
145 	for_each_pcm_substream(pcm, stream, substream)  in snd_pcm_lib_preallocate_free_for_all()
184 	struct snd_card *card = substream->pcm->card;  in snd_pcm_lib_preallocate_proc_write()
189 	guard(mutex)(&substream->pcm->open_mutex);  in snd_pcm_lib_preallocate_proc_write()
216 					 substream->pcm->card->number, substream->pcm->device,  in snd_pcm_lib_preallocate_proc_write()
218 					 substream->pcm->name, size);  in snd_pcm_lib_preallocate_proc_write()
237 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc",  in preallocate_info_init()
245 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc_max",  in preallocate_info_init()
297 static int preallocate_pages_for_all(struct snd_pcm *pcm, int type,  in preallocate_pages_for_all()  argument
304 	for_each_pcm_substream(pcm, stream, substream) {  in preallocate_pages_for_all()
314  * @substream: the pcm substream instance
332  * @pcm: the pcm instance
338  * Do pre-allocation to all substreams of the given pcm for the
341 void snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,  in snd_pcm_lib_preallocate_pages_for_all()  argument
345 	preallocate_pages_for_all(pcm, type, data, size, max, false);  in snd_pcm_lib_preallocate_pages_for_all()
351  * @substream: the pcm substream instance
359  * In this mode, PCM core will allocate a buffer automatically before PCM
360  * hw_params ops call, and release the buffer after PCM hw_free ops call
363  * When a buffer is actually allocated before the PCM hw_params call, it
390  * @pcm: the pcm instance
396  * Do pre-allocation to all substreams of the given pcm for the specified DMA
401 int snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type,  in snd_pcm_set_managed_buffer_all()  argument
405 	return preallocate_pages_for_all(pcm, type, data, size, max, true);  in snd_pcm_set_managed_buffer_all()
432 	card = substream->pcm->card;  in snd_pcm_lib_malloc_pages()
462 				 substream->pcm->card->number, substream->pcm->device,  in snd_pcm_lib_malloc_pages()
464 				 substream->pcm->name, size);  in snd_pcm_lib_malloc_pages()
492 		struct snd_card *card = substream->pcm->card;  in snd_pcm_lib_free_pages()