70 static int preallocate_pcm_pages(struct snd_pcm_substream *substream,  in preallocate_pcm_pages()  argument
73 	struct snd_dma_buffer *dmab = &substream->dma_buffer;  in preallocate_pcm_pages()
74 	struct snd_card *card = substream->pcm->card;  in preallocate_pcm_pages()
89 		substream->pcm->card->number, substream->pcm->device,  in preallocate_pcm_pages()
90 		substream->stream ? 'c' : 'p', substream->number,  in preallocate_pcm_pages()
91 		substream->pcm->name, orig_size);  in preallocate_pcm_pages()
101 void snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream)  in snd_pcm_lib_preallocate_free()  argument
103 	do_free_pages(substream->pcm->card, &substream->dma_buffer);  in snd_pcm_lib_preallocate_free()
114 	struct snd_pcm_substream *substream;  in snd_pcm_lib_preallocate_free_for_all()  local
117 	for_each_pcm_substream(pcm, stream, substream)  in snd_pcm_lib_preallocate_free_for_all()
118 		snd_pcm_lib_preallocate_free(substream);  in snd_pcm_lib_preallocate_free_for_all()
131 	struct snd_pcm_substream *substream = entry->private_data;  in snd_pcm_lib_preallocate_proc_read()  local
132 	snd_iprintf(buffer, "%lu\n", (unsigned long) substream->dma_buffer.bytes / 1024);  in snd_pcm_lib_preallocate_proc_read()
143 	struct snd_pcm_substream *substream = entry->private_data;  in snd_pcm_lib_preallocate_max_proc_read()  local
144 	snd_iprintf(buffer, "%lu\n", (unsigned long) substream->dma_max / 1024);  in snd_pcm_lib_preallocate_max_proc_read()
155 	struct snd_pcm_substream *substream = entry->private_data;  in snd_pcm_lib_preallocate_proc_write()  local
156 	struct snd_card *card = substream->pcm->card;  in snd_pcm_lib_preallocate_proc_write()
161 	if (substream->runtime) {  in snd_pcm_lib_preallocate_proc_write()
168 		if ((size != 0 && size < 8192) || size > substream->dma_max) {  in snd_pcm_lib_preallocate_proc_write()
172 		if (substream->dma_buffer.bytes == size)  in snd_pcm_lib_preallocate_proc_write()
175 		new_dmab.dev = substream->dma_buffer.dev;  in snd_pcm_lib_preallocate_proc_write()
178 					   substream->dma_buffer.dev.type,  in snd_pcm_lib_preallocate_proc_write()
179 					   substream->dma_buffer.dev.dev,  in snd_pcm_lib_preallocate_proc_write()
183 					 substream->pcm->card->number, substream->pcm->device,  in snd_pcm_lib_preallocate_proc_write()
184 					 substream->stream ? 'c' : 'p', substream->number,  in snd_pcm_lib_preallocate_proc_write()
185 					 substream->pcm->name, size);  in snd_pcm_lib_preallocate_proc_write()
188 			substream->buffer_bytes_max = size;  in snd_pcm_lib_preallocate_proc_write()
190 			substream->buffer_bytes_max = UINT_MAX;  in snd_pcm_lib_preallocate_proc_write()
192 		if (substream->dma_buffer.area)  in snd_pcm_lib_preallocate_proc_write()
193 			do_free_pages(card, &substream->dma_buffer);  in snd_pcm_lib_preallocate_proc_write()
194 		substream->dma_buffer = new_dmab;  in snd_pcm_lib_preallocate_proc_write()
200 static inline void preallocate_info_init(struct snd_pcm_substream *substream)  in preallocate_info_init()  argument
204 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc",  in preallocate_info_init()
205 					   substream->proc_root);  in preallocate_info_init()
207 		snd_info_set_text_ops(entry, substream,  in preallocate_info_init()
212 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc_max",  in preallocate_info_init()
213 					   substream->proc_root);  in preallocate_info_init()
215 		snd_info_set_text_ops(entry, substream,  in preallocate_info_init()
220 static inline void preallocate_info_init(struct snd_pcm_substream *substream)  in preallocate_info_init()  argument
228 static int preallocate_pages(struct snd_pcm_substream *substream,  in preallocate_pages()  argument
234 	if (snd_BUG_ON(substream->dma_buffer.dev.type))  in preallocate_pages()
237 	substream->dma_buffer.dev.type = type;  in preallocate_pages()
238 	substream->dma_buffer.dev.dev = data;  in preallocate_pages()
243 			err = preallocate_pcm_pages(substream, size, true);  in preallocate_pages()
247 			   substream->number < maximum_substreams) {  in preallocate_pages()
248 			err = preallocate_pcm_pages(substream, size, false);  in preallocate_pages()
254 	if (substream->dma_buffer.bytes > 0)  in preallocate_pages()
255 		substream->buffer_bytes_max = substream->dma_buffer.bytes;  in preallocate_pages()
256 	substream->dma_max = max;  in preallocate_pages()
258 		preallocate_info_init(substream);  in preallocate_pages()
260 		substream->managed_buffer_alloc = 1;  in preallocate_pages()
268 	struct snd_pcm_substream *substream;  in preallocate_pages_for_all()  local
271 	for_each_pcm_substream(pcm, stream, substream) {  in preallocate_pages_for_all()
272 		err = preallocate_pages(substream, type, data, size, max, managed);  in preallocate_pages_for_all()
289 void snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,  in snd_pcm_lib_preallocate_pages()  argument
293 	preallocate_pages(substream, type, data, size, max, false);  in snd_pcm_lib_preallocate_pages()
345 int snd_pcm_set_managed_buffer(struct snd_pcm_substream *substream, int type,  in snd_pcm_set_managed_buffer()  argument
348 	return preallocate_pages(substream, type, data, size, max, true);  in snd_pcm_set_managed_buffer()
383 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size)  in snd_pcm_lib_malloc_pages()  argument
389 	if (PCM_RUNTIME_CHECK(substream))  in snd_pcm_lib_malloc_pages()
391 	if (snd_BUG_ON(substream->dma_buffer.dev.type ==  in snd_pcm_lib_malloc_pages()
394 	runtime = substream->runtime;  in snd_pcm_lib_malloc_pages()
395 	card = substream->pcm->card;  in snd_pcm_lib_malloc_pages()
405 		snd_pcm_lib_free_pages(substream);  in snd_pcm_lib_malloc_pages()
407 	if (substream->dma_buffer.area != NULL &&  in snd_pcm_lib_malloc_pages()
408 	    substream->dma_buffer.bytes >= size) {  in snd_pcm_lib_malloc_pages()
409 		dmab = &substream->dma_buffer; /* use the pre-allocated buffer */  in snd_pcm_lib_malloc_pages()
412 		if (substream->dma_buffer.area && !substream->dma_max)  in snd_pcm_lib_malloc_pages()
417 		dmab->dev = substream->dma_buffer.dev;  in snd_pcm_lib_malloc_pages()
419 				   substream->dma_buffer.dev.type,  in snd_pcm_lib_malloc_pages()
420 				   substream->dma_buffer.dev.dev,  in snd_pcm_lib_malloc_pages()
424 				 substream->pcm->card->number, substream->pcm->device,  in snd_pcm_lib_malloc_pages()
425 				 substream->stream ? 'c' : 'p', substream->number,  in snd_pcm_lib_malloc_pages()
426 				 substream->pcm->name, size);  in snd_pcm_lib_malloc_pages()
430 	snd_pcm_set_runtime_buffer(substream, dmab);  in snd_pcm_lib_malloc_pages()
444 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream)  in snd_pcm_lib_free_pages()  argument
446 	struct snd_card *card = substream->pcm->card;  in snd_pcm_lib_free_pages()
449 	if (PCM_RUNTIME_CHECK(substream))  in snd_pcm_lib_free_pages()
451 	runtime = substream->runtime;  in snd_pcm_lib_free_pages()
454 	if (runtime->dma_buffer_p != &substream->dma_buffer) {  in snd_pcm_lib_free_pages()
459 	snd_pcm_set_runtime_buffer(substream, NULL);  in snd_pcm_lib_free_pages()
464 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,  in _snd_pcm_lib_alloc_vmalloc_buffer()  argument
469 	if (PCM_RUNTIME_CHECK(substream))  in _snd_pcm_lib_alloc_vmalloc_buffer()
471 	runtime = substream->runtime;  in _snd_pcm_lib_alloc_vmalloc_buffer()
492 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream)  in snd_pcm_lib_free_vmalloc_buffer()  argument
496 	if (PCM_RUNTIME_CHECK(substream))  in snd_pcm_lib_free_vmalloc_buffer()
498 	runtime = substream->runtime;  in snd_pcm_lib_free_vmalloc_buffer()
515 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,  in snd_pcm_lib_get_vmalloc_page()  argument
518 	return vmalloc_to_page(substream->runtime->dma_area + offset);  in snd_pcm_lib_get_vmalloc_page()