36 static int preallocate_pcm_pages(struct snd_pcm_substream *substream, size_t size)  in preallocate_pcm_pages()  argument
38 	struct snd_dma_buffer *dmab = &substream->dma_buffer;  in preallocate_pcm_pages()
53 		substream->pcm->card->number, substream->pcm->device,  in preallocate_pcm_pages()
54 		substream->stream ? 'c' : 'p', substream->number,  in preallocate_pcm_pages()
55 		substream->pcm->name, orig_size);  in preallocate_pcm_pages()
62 static void snd_pcm_lib_preallocate_dma_free(struct snd_pcm_substream *substream)  in snd_pcm_lib_preallocate_dma_free()  argument
64 	if (substream->dma_buffer.area == NULL)  in snd_pcm_lib_preallocate_dma_free()
66 	snd_dma_free_pages(&substream->dma_buffer);  in snd_pcm_lib_preallocate_dma_free()
67 	substream->dma_buffer.area = NULL;  in snd_pcm_lib_preallocate_dma_free()
76 void snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream)  in snd_pcm_lib_preallocate_free()  argument
78 	snd_pcm_lib_preallocate_dma_free(substream);  in snd_pcm_lib_preallocate_free()
89 	struct snd_pcm_substream *substream;  in snd_pcm_lib_preallocate_free_for_all()  local
93 		for (substream = pcm->streams[stream].substream; substream; substream = substream->next)  in snd_pcm_lib_preallocate_free_for_all()
94 			snd_pcm_lib_preallocate_free(substream);  in snd_pcm_lib_preallocate_free_for_all()
107 	struct snd_pcm_substream *substream = entry->private_data;  in snd_pcm_lib_preallocate_proc_read()  local
108 	snd_iprintf(buffer, "%lu\n", (unsigned long) substream->dma_buffer.bytes / 1024);  in snd_pcm_lib_preallocate_proc_read()
119 	struct snd_pcm_substream *substream = entry->private_data;  in snd_pcm_lib_preallocate_max_proc_read()  local
120 	snd_iprintf(buffer, "%lu\n", (unsigned long) substream->dma_max / 1024);  in snd_pcm_lib_preallocate_max_proc_read()
131 	struct snd_pcm_substream *substream = entry->private_data;  in snd_pcm_lib_preallocate_proc_write()  local
136 	if (substream->runtime) {  in snd_pcm_lib_preallocate_proc_write()
143 		if ((size != 0 && size < 8192) || size > substream->dma_max) {  in snd_pcm_lib_preallocate_proc_write()
147 		if (substream->dma_buffer.bytes == size)  in snd_pcm_lib_preallocate_proc_write()
150 		new_dmab.dev = substream->dma_buffer.dev;  in snd_pcm_lib_preallocate_proc_write()
152 			if (snd_dma_alloc_pages(substream->dma_buffer.dev.type,  in snd_pcm_lib_preallocate_proc_write()
153 						substream->dma_buffer.dev.dev,  in snd_pcm_lib_preallocate_proc_write()
158 			substream->buffer_bytes_max = size;  in snd_pcm_lib_preallocate_proc_write()
160 			substream->buffer_bytes_max = UINT_MAX;  in snd_pcm_lib_preallocate_proc_write()
162 		if (substream->dma_buffer.area)  in snd_pcm_lib_preallocate_proc_write()
163 			snd_dma_free_pages(&substream->dma_buffer);  in snd_pcm_lib_preallocate_proc_write()
164 		substream->dma_buffer = new_dmab;  in snd_pcm_lib_preallocate_proc_write()
170 static inline void preallocate_info_init(struct snd_pcm_substream *substream)  in preallocate_info_init()  argument
174 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc",  in preallocate_info_init()
175 					   substream->proc_root);  in preallocate_info_init()
177 		snd_info_set_text_ops(entry, substream,  in preallocate_info_init()
182 	entry = snd_info_create_card_entry(substream->pcm->card, "prealloc_max",  in preallocate_info_init()
183 					   substream->proc_root);  in preallocate_info_init()
185 		snd_info_set_text_ops(entry, substream,  in preallocate_info_init()
196 static void snd_pcm_lib_preallocate_pages1(struct snd_pcm_substream *substream,  in snd_pcm_lib_preallocate_pages1()  argument
200 	if (size > 0 && preallocate_dma && substream->number < maximum_substreams)  in snd_pcm_lib_preallocate_pages1()
201 		preallocate_pcm_pages(substream, size);  in snd_pcm_lib_preallocate_pages1()
203 	if (substream->dma_buffer.bytes > 0)  in snd_pcm_lib_preallocate_pages1()
204 		substream->buffer_bytes_max = substream->dma_buffer.bytes;  in snd_pcm_lib_preallocate_pages1()
205 	substream->dma_max = max;  in snd_pcm_lib_preallocate_pages1()
206 	preallocate_info_init(substream);  in snd_pcm_lib_preallocate_pages1()
220 void snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,  in snd_pcm_lib_preallocate_pages()  argument
224 	substream->dma_buffer.dev.type = type;  in snd_pcm_lib_preallocate_pages()
225 	substream->dma_buffer.dev.dev = data;  in snd_pcm_lib_preallocate_pages()
226 	snd_pcm_lib_preallocate_pages1(substream, size, max);  in snd_pcm_lib_preallocate_pages()
245 	struct snd_pcm_substream *substream;  in snd_pcm_lib_preallocate_pages_for_all()  local
249 		for (substream = pcm->streams[stream].substream; substream; substream = substream->next)  in snd_pcm_lib_preallocate_pages_for_all()
250 			snd_pcm_lib_preallocate_pages(substream, type, data, size, max);  in snd_pcm_lib_preallocate_pages_for_all()
264 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset)  in snd_pcm_sgbuf_ops_page()  argument
266 	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);  in snd_pcm_sgbuf_ops_page()
287 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size)  in snd_pcm_lib_malloc_pages()  argument
292 	if (PCM_RUNTIME_CHECK(substream))  in snd_pcm_lib_malloc_pages()
294 	if (snd_BUG_ON(substream->dma_buffer.dev.type ==  in snd_pcm_lib_malloc_pages()
297 	runtime = substream->runtime;  in snd_pcm_lib_malloc_pages()
307 		snd_pcm_lib_free_pages(substream);  in snd_pcm_lib_malloc_pages()
309 	if (substream->dma_buffer.area != NULL &&  in snd_pcm_lib_malloc_pages()
310 	    substream->dma_buffer.bytes >= size) {  in snd_pcm_lib_malloc_pages()
311 		dmab = &substream->dma_buffer; /* use the pre-allocated buffer */  in snd_pcm_lib_malloc_pages()
316 		dmab->dev = substream->dma_buffer.dev;  in snd_pcm_lib_malloc_pages()
317 		if (snd_dma_alloc_pages(substream->dma_buffer.dev.type,  in snd_pcm_lib_malloc_pages()
318 					substream->dma_buffer.dev.dev,  in snd_pcm_lib_malloc_pages()
324 	snd_pcm_set_runtime_buffer(substream, dmab);  in snd_pcm_lib_malloc_pages()
338 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream)  in snd_pcm_lib_free_pages()  argument
342 	if (PCM_RUNTIME_CHECK(substream))  in snd_pcm_lib_free_pages()
344 	runtime = substream->runtime;  in snd_pcm_lib_free_pages()
347 	if (runtime->dma_buffer_p != &substream->dma_buffer) {  in snd_pcm_lib_free_pages()
352 	snd_pcm_set_runtime_buffer(substream, NULL);  in snd_pcm_lib_free_pages()
357 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,  in _snd_pcm_lib_alloc_vmalloc_buffer()  argument
362 	if (PCM_RUNTIME_CHECK(substream))  in _snd_pcm_lib_alloc_vmalloc_buffer()
364 	runtime = substream->runtime;  in _snd_pcm_lib_alloc_vmalloc_buffer()
385 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream)  in snd_pcm_lib_free_vmalloc_buffer()  argument
389 	if (PCM_RUNTIME_CHECK(substream))  in snd_pcm_lib_free_vmalloc_buffer()
391 	runtime = substream->runtime;  in snd_pcm_lib_free_vmalloc_buffer()
408 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,  in snd_pcm_lib_get_vmalloc_page()  argument
411 	return vmalloc_to_page(substream->runtime->dma_area + offset);  in snd_pcm_lib_get_vmalloc_page()