103 static int preallocate_pcm_pages(struct snd_pcm_substream *substream,  in preallocate_pcm_pages()  argument
106 	struct snd_dma_buffer *dmab = &substream->dma_buffer;  in preallocate_pcm_pages()
107 	struct snd_card *card = substream->pcm->card;  in preallocate_pcm_pages()
113 				     substream->stream, size, dmab);  in preallocate_pcm_pages()
122 		substream->pcm->card->number, substream->pcm->device,  in preallocate_pcm_pages()
123 		substream->stream ? 'c' : 'p', substream->number,  in preallocate_pcm_pages()
124 		substream->pcm->name, orig_size);  in preallocate_pcm_pages()
134 void snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream)  in snd_pcm_lib_preallocate_free()  argument
136 	do_free_pages(substream->pcm->card, &substream->dma_buffer);  in snd_pcm_lib_preallocate_free()
147 	struct snd_pcm_substream *substream;  in snd_pcm_lib_preallocate_free_for_all()  local
150 	for_each_pcm_substream(pcm, stream, substream)  in snd_pcm_lib_preallocate_free_for_all()
151 		snd_pcm_lib_preallocate_free(substream);  in snd_pcm_lib_preallocate_free_for_all()
164 	struct snd_pcm_substream *substream = entry->private_data;  in snd_pcm_lib_preallocate_proc_read()  local
165 	snd_iprintf(buffer, "%lu\n", (unsigned long) substream->dma_buffer.bytes / 1024);  in snd_pcm_lib_preallocate_proc_read()
176 	struct snd_pcm_substream *substream = entry->private_data;  in snd_pcm_lib_preallocate_max_proc_read()  local
177 	snd_iprintf(buffer, "%lu\n", (unsigned long) substream->dma_max / 1024);  in snd_pcm_lib_preallocate_max_proc_read()
188 	struct snd_pcm_substream *substream = entry->private_data;  in snd_pcm_lib_preallocate_proc_write()  local
189 	struct snd_card *card = substream->pcm->card;  in snd_pcm_lib_preallocate_proc_write()
194 	mutex_lock(&substream->pcm->open_mutex);  in snd_pcm_lib_preallocate_proc_write()
195 	if (substream->runtime) {  in snd_pcm_lib_preallocate_proc_write()
202 		if ((size != 0 && size < 8192) || size > substream->dma_max) {  in snd_pcm_lib_preallocate_proc_write()
206 		if (substream->dma_buffer.bytes == size)  in snd_pcm_lib_preallocate_proc_write()
209 		new_dmab.dev = substream->dma_buffer.dev;  in snd_pcm_lib_preallocate_proc_write()
212 					   substream->dma_buffer.dev.type,  in snd_pcm_lib_preallocate_proc_write()
213 					   substream->dma_buffer.dev.dev,  in snd_pcm_lib_preallocate_proc_write()
214 					   substream->stream,  in snd_pcm_lib_preallocate_proc_write()
218 					 substream->pcm->card->number, substream->pcm->device,  in snd_pcm_lib_preallocate_proc_write()
219 					 substream->stream ? 'c' : 'p', substream->number,  in snd_pcm_lib_preallocate_proc_write()
220 					 substream->pcm->name, size);  in snd_pcm_lib_preallocate_proc_write()
223 			substream->buffer_bytes_max = size;  in snd_pcm_lib_preallocate_proc_write()
225 			substream->buffer_bytes_max = UINT_MAX;  in snd_pcm_lib_preallocate_proc_write()
227 		if (substream->dma_buffer.area)  in snd_pcm_lib_preallocate_proc_write()
228 			do_free_pages(card, &substream->dma_buffer);  in snd_pcm_lib_preallocate_proc_write()
229 		substream->dma_buffer = new_dmab;  in snd_pcm_lib_preallocate_proc_write()
234 	mutex_unlock(&substream->pcm->open_mutex);  in snd_pcm_lib_preallocate_proc_write()
237 static inline void preallocate_info_init(struct snd_pcm_substream *substream)  in preallocate_info_init()  argument
241 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc",  in preallocate_info_init()
242 					   substream->proc_root);  in preallocate_info_init()
244 		snd_info_set_text_ops(entry, substream,  in preallocate_info_init()
249 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc_max",  in preallocate_info_init()
250 					   substream->proc_root);  in preallocate_info_init()
252 		snd_info_set_text_ops(entry, substream,  in preallocate_info_init()
257 static inline void preallocate_info_init(struct snd_pcm_substream *substream)  in preallocate_info_init()  argument
265 static int preallocate_pages(struct snd_pcm_substream *substream,  in preallocate_pages()  argument
271 	if (snd_BUG_ON(substream->dma_buffer.dev.type))  in preallocate_pages()
274 	substream->dma_buffer.dev.type = type;  in preallocate_pages()
275 	substream->dma_buffer.dev.dev = data;  in preallocate_pages()
280 			err = preallocate_pcm_pages(substream, size, true);  in preallocate_pages()
284 			   substream->number < maximum_substreams) {  in preallocate_pages()
285 			err = preallocate_pcm_pages(substream, size, false);  in preallocate_pages()
291 	if (substream->dma_buffer.bytes > 0)  in preallocate_pages()
292 		substream->buffer_bytes_max = substream->dma_buffer.bytes;  in preallocate_pages()
293 	substream->dma_max = max;  in preallocate_pages()
295 		preallocate_info_init(substream);  in preallocate_pages()
297 		substream->managed_buffer_alloc = 1;  in preallocate_pages()
305 	struct snd_pcm_substream *substream;  in preallocate_pages_for_all()  local
308 	for_each_pcm_substream(pcm, stream, substream) {  in preallocate_pages_for_all()
309 		err = preallocate_pages(substream, type, data, size, max, managed);  in preallocate_pages_for_all()
326 void snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,  in snd_pcm_lib_preallocate_pages()  argument
330 	preallocate_pages(substream, type, data, size, max, false);  in snd_pcm_lib_preallocate_pages()
384 int snd_pcm_set_managed_buffer(struct snd_pcm_substream *substream, int type,  in snd_pcm_set_managed_buffer()  argument
387 	return preallocate_pages(substream, type, data, size, max, true);  in snd_pcm_set_managed_buffer()
424 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size)  in snd_pcm_lib_malloc_pages()  argument
430 	if (PCM_RUNTIME_CHECK(substream))  in snd_pcm_lib_malloc_pages()
432 	if (snd_BUG_ON(substream->dma_buffer.dev.type ==  in snd_pcm_lib_malloc_pages()
435 	runtime = substream->runtime;  in snd_pcm_lib_malloc_pages()
436 	card = substream->pcm->card;  in snd_pcm_lib_malloc_pages()
446 		snd_pcm_lib_free_pages(substream);  in snd_pcm_lib_malloc_pages()
448 	if (substream->dma_buffer.area != NULL &&  in snd_pcm_lib_malloc_pages()
449 	    substream->dma_buffer.bytes >= size) {  in snd_pcm_lib_malloc_pages()
450 		dmab = &substream->dma_buffer; /* use the pre-allocated buffer */  in snd_pcm_lib_malloc_pages()
453 		if (substream->dma_buffer.area && !substream->dma_max)  in snd_pcm_lib_malloc_pages()
458 		dmab->dev = substream->dma_buffer.dev;  in snd_pcm_lib_malloc_pages()
460 				   substream->dma_buffer.dev.type,  in snd_pcm_lib_malloc_pages()
461 				   substream->dma_buffer.dev.dev,  in snd_pcm_lib_malloc_pages()
462 				   substream->stream,  in snd_pcm_lib_malloc_pages()
466 				 substream->pcm->card->number, substream->pcm->device,  in snd_pcm_lib_malloc_pages()
467 				 substream->stream ? 'c' : 'p', substream->number,  in snd_pcm_lib_malloc_pages()
468 				 substream->pcm->name, size);  in snd_pcm_lib_malloc_pages()
472 	snd_pcm_set_runtime_buffer(substream, dmab);  in snd_pcm_lib_malloc_pages()
486 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream)  in snd_pcm_lib_free_pages()  argument
490 	if (PCM_RUNTIME_CHECK(substream))  in snd_pcm_lib_free_pages()
492 	runtime = substream->runtime;  in snd_pcm_lib_free_pages()
495 	if (runtime->dma_buffer_p != &substream->dma_buffer) {  in snd_pcm_lib_free_pages()
496 		struct snd_card *card = substream->pcm->card;  in snd_pcm_lib_free_pages()
502 	snd_pcm_set_runtime_buffer(substream, NULL);  in snd_pcm_lib_free_pages()
507 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,  in _snd_pcm_lib_alloc_vmalloc_buffer()  argument
512 	if (PCM_RUNTIME_CHECK(substream))  in _snd_pcm_lib_alloc_vmalloc_buffer()
514 	runtime = substream->runtime;  in _snd_pcm_lib_alloc_vmalloc_buffer()
535 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream)  in snd_pcm_lib_free_vmalloc_buffer()  argument
539 	if (PCM_RUNTIME_CHECK(substream))  in snd_pcm_lib_free_vmalloc_buffer()
541 	runtime = substream->runtime;  in snd_pcm_lib_free_vmalloc_buffer()
558 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,  in snd_pcm_lib_get_vmalloc_page()  argument
561 	return vmalloc_to_page(substream->runtime->dma_area + offset);  in snd_pcm_lib_get_vmalloc_page()