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.");
74 	struct snd_card *card = substream->pcm->card;  in preallocate_pcm_pages()
89 		substream->pcm->card->number, substream->pcm->device,  in preallocate_pcm_pages()
91 		substream->pcm->name, orig_size);  in preallocate_pcm_pages()
97  * @substream: the pcm substream instance
103 	do_free_pages(substream->pcm->card, &substream->dma_buffer);  in snd_pcm_lib_preallocate_free()
107  * snd_pcm_lib_preallocate_free_for_all - release all pre-allocated buffers on the pcm
108  * @pcm: the pcm instance
110  * Releases all the pre-allocated buffers on the given pcm.
112 void snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm)  in snd_pcm_lib_preallocate_free_for_all()  argument
117 	for_each_pcm_substream(pcm, stream, substream)  in snd_pcm_lib_preallocate_free_for_all()
156 	struct snd_card *card = substream->pcm->card;  in snd_pcm_lib_preallocate_proc_write()
183 					 substream->pcm->card->number, substream->pcm->device,  in snd_pcm_lib_preallocate_proc_write()
185 					 substream->pcm->name, size);  in snd_pcm_lib_preallocate_proc_write()
204 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc",  in preallocate_info_init()
212 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc_max",  in preallocate_info_init()
264 static int preallocate_pages_for_all(struct snd_pcm *pcm, int type,  in preallocate_pages_for_all()  argument
271 	for_each_pcm_substream(pcm, stream, substream) {  in preallocate_pages_for_all()
281  * @substream: the pcm substream instance
299  * @pcm: the pcm instance
305  * Do pre-allocation to all substreams of the given pcm for the
308 void snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,  in snd_pcm_lib_preallocate_pages_for_all()  argument
312 	preallocate_pages_for_all(pcm, type, data, size, max, false);  in snd_pcm_lib_preallocate_pages_for_all()
318  * @substream: the pcm substream instance
326  * In this mode, PCM core will allocate a buffer automatically before PCM
327  * hw_params ops call, and release the buffer after PCM hw_free ops call
330  * When a buffer is actually allocated before the PCM hw_params call, it
355  * @pcm: the pcm instance
361  * Do pre-allocation to all substreams of the given pcm for the specified DMA
364 int snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type,  in snd_pcm_set_managed_buffer_all()  argument
368 	return preallocate_pages_for_all(pcm, type, data, size, max, true);  in snd_pcm_set_managed_buffer_all()
395 	card = substream->pcm->card;  in snd_pcm_lib_malloc_pages()
424 				 substream->pcm->card->number, substream->pcm->device,  in snd_pcm_lib_malloc_pages()
426 				 substream->pcm->name, size);  in snd_pcm_lib_malloc_pages()
446 	struct snd_card *card = substream->pcm->card;  in snd_pcm_lib_free_pages()
511  * This function is to be used as the page callback in the PCM ops.