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1da177e4 | 1 | /* |
c1017a4c | 2 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
3 | * Takashi Iwai <tiwai@suse.de> |
4 | * | |
5 | * Generic memory allocators | |
6 | * | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
1da177e4 LT |
24 | #include <linux/module.h> |
25 | #include <linux/proc_fs.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/pci.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/mm.h> | |
ccec6e2c | 30 | #include <linux/seq_file.h> |
b6a96915 | 31 | #include <asm/uaccess.h> |
1da177e4 | 32 | #include <linux/dma-mapping.h> |
05503214 | 33 | #include <linux/genalloc.h> |
1da177e4 | 34 | #include <linux/moduleparam.h> |
1a60d4c5 | 35 | #include <linux/mutex.h> |
1da177e4 | 36 | #include <sound/memalloc.h> |
1da177e4 LT |
37 | |
38 | ||
c1017a4c | 39 | MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>, Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
40 | MODULE_DESCRIPTION("Memory allocator for ALSA system."); |
41 | MODULE_LICENSE("GPL"); | |
42 | ||
43 | ||
1da177e4 LT |
44 | /* |
45 | */ | |
46 | ||
1a60d4c5 | 47 | static DEFINE_MUTEX(list_mutex); |
1da177e4 LT |
48 | static LIST_HEAD(mem_list_head); |
49 | ||
50 | /* buffer preservation list */ | |
51 | struct snd_mem_list { | |
52 | struct snd_dma_buffer buffer; | |
53 | unsigned int id; | |
54 | struct list_head list; | |
55 | }; | |
56 | ||
57 | /* id for pre-allocated buffers */ | |
58 | #define SNDRV_DMA_DEVICE_UNUSED (unsigned int)-1 | |
59 | ||
1da177e4 LT |
60 | /* |
61 | * | |
62 | * Generic memory allocators | |
63 | * | |
64 | */ | |
65 | ||
66 | static long snd_allocated_pages; /* holding the number of allocated pages */ | |
67 | ||
68 | static inline void inc_snd_pages(int order) | |
69 | { | |
70 | snd_allocated_pages += 1 << order; | |
71 | } | |
72 | ||
73 | static inline void dec_snd_pages(int order) | |
74 | { | |
75 | snd_allocated_pages -= 1 << order; | |
76 | } | |
77 | ||
1da177e4 LT |
78 | /** |
79 | * snd_malloc_pages - allocate pages with the given size | |
80 | * @size: the size to allocate in bytes | |
81 | * @gfp_flags: the allocation conditions, GFP_XXX | |
82 | * | |
83 | * Allocates the physically contiguous pages with the given size. | |
84 | * | |
eb7c06e8 | 85 | * Return: The pointer of the buffer, or %NULL if no enough memory. |
1da177e4 | 86 | */ |
1ef64e67 | 87 | void *snd_malloc_pages(size_t size, gfp_t gfp_flags) |
1da177e4 LT |
88 | { |
89 | int pg; | |
90 | void *res; | |
91 | ||
7eaa943c TI |
92 | if (WARN_ON(!size)) |
93 | return NULL; | |
94 | if (WARN_ON(!gfp_flags)) | |
95 | return NULL; | |
f3d48f03 | 96 | gfp_flags |= __GFP_COMP; /* compound page lets parts be mapped */ |
1da177e4 | 97 | pg = get_order(size); |
2ba8c15c | 98 | if ((res = (void *) __get_free_pages(gfp_flags, pg)) != NULL) |
1da177e4 | 99 | inc_snd_pages(pg); |
1da177e4 LT |
100 | return res; |
101 | } | |
102 | ||
103 | /** | |
104 | * snd_free_pages - release the pages | |
105 | * @ptr: the buffer pointer to release | |
106 | * @size: the allocated buffer size | |
107 | * | |
108 | * Releases the buffer allocated via snd_malloc_pages(). | |
109 | */ | |
110 | void snd_free_pages(void *ptr, size_t size) | |
111 | { | |
112 | int pg; | |
113 | ||
114 | if (ptr == NULL) | |
115 | return; | |
116 | pg = get_order(size); | |
117 | dec_snd_pages(pg); | |
1da177e4 LT |
118 | free_pages((unsigned long) ptr, pg); |
119 | } | |
120 | ||
121 | /* | |
122 | * | |
123 | * Bus-specific memory allocators | |
124 | * | |
125 | */ | |
126 | ||
8f11551b | 127 | #ifdef CONFIG_HAS_DMA |
1da177e4 LT |
128 | /* allocate the coherent DMA pages */ |
129 | static void *snd_malloc_dev_pages(struct device *dev, size_t size, dma_addr_t *dma) | |
130 | { | |
131 | int pg; | |
132 | void *res; | |
1ef64e67 | 133 | gfp_t gfp_flags; |
1da177e4 | 134 | |
7eaa943c TI |
135 | if (WARN_ON(!dma)) |
136 | return NULL; | |
1da177e4 LT |
137 | pg = get_order(size); |
138 | gfp_flags = GFP_KERNEL | |
f3d48f03 | 139 | | __GFP_COMP /* compound page lets parts be mapped */ |
1da177e4 LT |
140 | | __GFP_NORETRY /* don't trigger OOM-killer */ |
141 | | __GFP_NOWARN; /* no stack trace print - this call is non-critical */ | |
142 | res = dma_alloc_coherent(dev, PAGE_SIZE << pg, dma, gfp_flags); | |
2ba8c15c | 143 | if (res != NULL) |
1da177e4 | 144 | inc_snd_pages(pg); |
1da177e4 LT |
145 | |
146 | return res; | |
147 | } | |
148 | ||
149 | /* free the coherent DMA pages */ | |
150 | static void snd_free_dev_pages(struct device *dev, size_t size, void *ptr, | |
151 | dma_addr_t dma) | |
152 | { | |
153 | int pg; | |
154 | ||
155 | if (ptr == NULL) | |
156 | return; | |
157 | pg = get_order(size); | |
158 | dec_snd_pages(pg); | |
1da177e4 LT |
159 | dma_free_coherent(dev, PAGE_SIZE << pg, ptr, dma); |
160 | } | |
05503214 | 161 | |
63437313 | 162 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 NC |
163 | /** |
164 | * snd_malloc_dev_iram - allocate memory from on-chip internal ram | |
165 | * @dmab: buffer allocation record to store the allocated data | |
166 | * @size: number of bytes to allocate from the iram | |
167 | * | |
168 | * This function requires iram phandle provided via of_node | |
169 | */ | |
9f694bc7 | 170 | static void snd_malloc_dev_iram(struct snd_dma_buffer *dmab, size_t size) |
05503214 NC |
171 | { |
172 | struct device *dev = dmab->dev.dev; | |
173 | struct gen_pool *pool = NULL; | |
174 | ||
175 | if (dev->of_node) | |
176 | pool = of_get_named_gen_pool(dev->of_node, "iram", 0); | |
177 | ||
178 | if (!pool) | |
179 | return; | |
180 | ||
181 | /* Assign the pool into private_data field */ | |
182 | dmab->private_data = pool; | |
183 | ||
184 | dmab->area = (void *)gen_pool_alloc(pool, size); | |
185 | if (!dmab->area) | |
186 | return; | |
187 | ||
188 | dmab->addr = gen_pool_virt_to_phys(pool, (unsigned long)dmab->area); | |
189 | } | |
190 | ||
191 | /** | |
192 | * snd_free_dev_iram - free allocated specific memory from on-chip internal ram | |
193 | * @dmab: buffer allocation record to store the allocated data | |
194 | */ | |
9f694bc7 | 195 | static void snd_free_dev_iram(struct snd_dma_buffer *dmab) |
05503214 NC |
196 | { |
197 | struct gen_pool *pool = dmab->private_data; | |
198 | ||
199 | if (pool && dmab->area) | |
200 | gen_pool_free(pool, (unsigned long)dmab->area, dmab->bytes); | |
201 | } | |
63437313 | 202 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
8f11551b | 203 | #endif /* CONFIG_HAS_DMA */ |
1da177e4 | 204 | |
1da177e4 LT |
205 | /* |
206 | * | |
207 | * ALSA generic memory management | |
208 | * | |
209 | */ | |
210 | ||
211 | ||
212 | /** | |
213 | * snd_dma_alloc_pages - allocate the buffer area according to the given type | |
214 | * @type: the DMA buffer type | |
215 | * @device: the device pointer | |
216 | * @size: the buffer size to allocate | |
217 | * @dmab: buffer allocation record to store the allocated data | |
218 | * | |
219 | * Calls the memory-allocator function for the corresponding | |
220 | * buffer type. | |
eb7c06e8 YB |
221 | * |
222 | * Return: Zero if the buffer with the given size is allocated successfully, | |
223 | * otherwise a negative value on error. | |
1da177e4 LT |
224 | */ |
225 | int snd_dma_alloc_pages(int type, struct device *device, size_t size, | |
226 | struct snd_dma_buffer *dmab) | |
227 | { | |
7eaa943c TI |
228 | if (WARN_ON(!size)) |
229 | return -ENXIO; | |
230 | if (WARN_ON(!dmab)) | |
231 | return -ENXIO; | |
1da177e4 LT |
232 | |
233 | dmab->dev.type = type; | |
234 | dmab->dev.dev = device; | |
235 | dmab->bytes = 0; | |
236 | switch (type) { | |
237 | case SNDRV_DMA_TYPE_CONTINUOUS: | |
fea952e5 CL |
238 | dmab->area = snd_malloc_pages(size, |
239 | (__force gfp_t)(unsigned long)device); | |
1da177e4 LT |
240 | dmab->addr = 0; |
241 | break; | |
8f11551b | 242 | #ifdef CONFIG_HAS_DMA |
a5606f85 | 243 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 NC |
244 | case SNDRV_DMA_TYPE_DEV_IRAM: |
245 | snd_malloc_dev_iram(dmab, size); | |
246 | if (dmab->area) | |
247 | break; | |
248 | /* Internal memory might have limited size and no enough space, | |
249 | * so if we fail to malloc, try to fetch memory traditionally. | |
250 | */ | |
251 | dmab->dev.type = SNDRV_DMA_TYPE_DEV; | |
a5606f85 | 252 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
1da177e4 LT |
253 | case SNDRV_DMA_TYPE_DEV: |
254 | dmab->area = snd_malloc_dev_pages(device, size, &dmab->addr); | |
255 | break; | |
cc6a8acd TI |
256 | #endif |
257 | #ifdef CONFIG_SND_DMA_SGBUF | |
1da177e4 LT |
258 | case SNDRV_DMA_TYPE_DEV_SG: |
259 | snd_malloc_sgbuf_pages(device, size, dmab, NULL); | |
260 | break; | |
8f11551b | 261 | #endif |
1da177e4 LT |
262 | default: |
263 | printk(KERN_ERR "snd-malloc: invalid device type %d\n", type); | |
264 | dmab->area = NULL; | |
265 | dmab->addr = 0; | |
266 | return -ENXIO; | |
267 | } | |
268 | if (! dmab->area) | |
269 | return -ENOMEM; | |
270 | dmab->bytes = size; | |
271 | return 0; | |
272 | } | |
273 | ||
274 | /** | |
275 | * snd_dma_alloc_pages_fallback - allocate the buffer area according to the given type with fallback | |
276 | * @type: the DMA buffer type | |
277 | * @device: the device pointer | |
278 | * @size: the buffer size to allocate | |
279 | * @dmab: buffer allocation record to store the allocated data | |
280 | * | |
281 | * Calls the memory-allocator function for the corresponding | |
282 | * buffer type. When no space is left, this function reduces the size and | |
283 | * tries to allocate again. The size actually allocated is stored in | |
284 | * res_size argument. | |
eb7c06e8 YB |
285 | * |
286 | * Return: Zero if the buffer with the given size is allocated successfully, | |
287 | * otherwise a negative value on error. | |
1da177e4 LT |
288 | */ |
289 | int snd_dma_alloc_pages_fallback(int type, struct device *device, size_t size, | |
290 | struct snd_dma_buffer *dmab) | |
291 | { | |
292 | int err; | |
293 | ||
1da177e4 | 294 | while ((err = snd_dma_alloc_pages(type, device, size, dmab)) < 0) { |
4e184f8f | 295 | size_t aligned_size; |
1da177e4 LT |
296 | if (err != -ENOMEM) |
297 | return err; | |
1da177e4 LT |
298 | if (size <= PAGE_SIZE) |
299 | return -ENOMEM; | |
4e184f8f TI |
300 | aligned_size = PAGE_SIZE << get_order(size); |
301 | if (size != aligned_size) | |
302 | size = aligned_size; | |
303 | else | |
304 | size >>= 1; | |
1da177e4 LT |
305 | } |
306 | if (! dmab->area) | |
307 | return -ENOMEM; | |
308 | return 0; | |
309 | } | |
310 | ||
311 | ||
312 | /** | |
313 | * snd_dma_free_pages - release the allocated buffer | |
314 | * @dmab: the buffer allocation record to release | |
315 | * | |
316 | * Releases the allocated buffer via snd_dma_alloc_pages(). | |
317 | */ | |
318 | void snd_dma_free_pages(struct snd_dma_buffer *dmab) | |
319 | { | |
320 | switch (dmab->dev.type) { | |
321 | case SNDRV_DMA_TYPE_CONTINUOUS: | |
322 | snd_free_pages(dmab->area, dmab->bytes); | |
323 | break; | |
8f11551b | 324 | #ifdef CONFIG_HAS_DMA |
a5606f85 | 325 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 NC |
326 | case SNDRV_DMA_TYPE_DEV_IRAM: |
327 | snd_free_dev_iram(dmab); | |
328 | break; | |
a5606f85 | 329 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
1da177e4 LT |
330 | case SNDRV_DMA_TYPE_DEV: |
331 | snd_free_dev_pages(dmab->dev.dev, dmab->bytes, dmab->area, dmab->addr); | |
332 | break; | |
cc6a8acd TI |
333 | #endif |
334 | #ifdef CONFIG_SND_DMA_SGBUF | |
1da177e4 LT |
335 | case SNDRV_DMA_TYPE_DEV_SG: |
336 | snd_free_sgbuf_pages(dmab); | |
337 | break; | |
8f11551b | 338 | #endif |
1da177e4 LT |
339 | default: |
340 | printk(KERN_ERR "snd-malloc: invalid device type %d\n", dmab->dev.type); | |
341 | } | |
342 | } | |
343 | ||
344 | ||
345 | /** | |
346 | * snd_dma_get_reserved - get the reserved buffer for the given device | |
347 | * @dmab: the buffer allocation record to store | |
348 | * @id: the buffer id | |
349 | * | |
350 | * Looks for the reserved-buffer list and re-uses if the same buffer | |
351 | * is found in the list. When the buffer is found, it's removed from the free list. | |
352 | * | |
eb7c06e8 | 353 | * Return: The size of buffer if the buffer is found, or zero if not found. |
1da177e4 LT |
354 | */ |
355 | size_t snd_dma_get_reserved_buf(struct snd_dma_buffer *dmab, unsigned int id) | |
356 | { | |
1da177e4 LT |
357 | struct snd_mem_list *mem; |
358 | ||
7eaa943c TI |
359 | if (WARN_ON(!dmab)) |
360 | return 0; | |
1da177e4 | 361 | |
1a60d4c5 | 362 | mutex_lock(&list_mutex); |
9244b2c3 | 363 | list_for_each_entry(mem, &mem_list_head, list) { |
1da177e4 | 364 | if (mem->id == id && |
b6a96915 TI |
365 | (mem->buffer.dev.dev == NULL || dmab->dev.dev == NULL || |
366 | ! memcmp(&mem->buffer.dev, &dmab->dev, sizeof(dmab->dev)))) { | |
367 | struct device *dev = dmab->dev.dev; | |
9244b2c3 | 368 | list_del(&mem->list); |
1da177e4 | 369 | *dmab = mem->buffer; |
b6a96915 TI |
370 | if (dmab->dev.dev == NULL) |
371 | dmab->dev.dev = dev; | |
1da177e4 | 372 | kfree(mem); |
1a60d4c5 | 373 | mutex_unlock(&list_mutex); |
1da177e4 LT |
374 | return dmab->bytes; |
375 | } | |
376 | } | |
1a60d4c5 | 377 | mutex_unlock(&list_mutex); |
1da177e4 LT |
378 | return 0; |
379 | } | |
380 | ||
381 | /** | |
382 | * snd_dma_reserve_buf - reserve the buffer | |
383 | * @dmab: the buffer to reserve | |
384 | * @id: the buffer id | |
385 | * | |
386 | * Reserves the given buffer as a reserved buffer. | |
eb7c06e8 YB |
387 | * |
388 | * Return: Zero if successful, or a negative code on error. | |
1da177e4 LT |
389 | */ |
390 | int snd_dma_reserve_buf(struct snd_dma_buffer *dmab, unsigned int id) | |
391 | { | |
392 | struct snd_mem_list *mem; | |
393 | ||
7eaa943c TI |
394 | if (WARN_ON(!dmab)) |
395 | return -EINVAL; | |
1da177e4 LT |
396 | mem = kmalloc(sizeof(*mem), GFP_KERNEL); |
397 | if (! mem) | |
398 | return -ENOMEM; | |
1a60d4c5 | 399 | mutex_lock(&list_mutex); |
1da177e4 LT |
400 | mem->buffer = *dmab; |
401 | mem->id = id; | |
402 | list_add_tail(&mem->list, &mem_list_head); | |
1a60d4c5 | 403 | mutex_unlock(&list_mutex); |
1da177e4 LT |
404 | return 0; |
405 | } | |
406 | ||
407 | /* | |
408 | * purge all reserved buffers | |
409 | */ | |
410 | static void free_all_reserved_pages(void) | |
411 | { | |
412 | struct list_head *p; | |
413 | struct snd_mem_list *mem; | |
414 | ||
1a60d4c5 | 415 | mutex_lock(&list_mutex); |
1da177e4 LT |
416 | while (! list_empty(&mem_list_head)) { |
417 | p = mem_list_head.next; | |
418 | mem = list_entry(p, struct snd_mem_list, list); | |
419 | list_del(p); | |
420 | snd_dma_free_pages(&mem->buffer); | |
421 | kfree(mem); | |
422 | } | |
1a60d4c5 | 423 | mutex_unlock(&list_mutex); |
1da177e4 LT |
424 | } |
425 | ||
426 | ||
1da177e4 LT |
427 | #ifdef CONFIG_PROC_FS |
428 | /* | |
429 | * proc file interface | |
430 | */ | |
b6a96915 | 431 | #define SND_MEM_PROC_FILE "driver/snd-page-alloc" |
a53fc188 | 432 | static struct proc_dir_entry *snd_mem_proc; |
b6a96915 | 433 | |
ccec6e2c | 434 | static int snd_mem_proc_read(struct seq_file *seq, void *offset) |
1da177e4 | 435 | { |
1da177e4 | 436 | long pages = snd_allocated_pages >> (PAGE_SHIFT-12); |
1da177e4 LT |
437 | struct snd_mem_list *mem; |
438 | int devno; | |
759ee81b | 439 | static char *types[] = { "UNKNOWN", "CONT", "DEV", "DEV-SG" }; |
1da177e4 | 440 | |
1a60d4c5 | 441 | mutex_lock(&list_mutex); |
ccec6e2c TI |
442 | seq_printf(seq, "pages : %li bytes (%li pages per %likB)\n", |
443 | pages * PAGE_SIZE, pages, PAGE_SIZE / 1024); | |
1da177e4 | 444 | devno = 0; |
9244b2c3 | 445 | list_for_each_entry(mem, &mem_list_head, list) { |
1da177e4 | 446 | devno++; |
ccec6e2c TI |
447 | seq_printf(seq, "buffer %d : ID %08x : type %s\n", |
448 | devno, mem->id, types[mem->buffer.dev.type]); | |
449 | seq_printf(seq, " addr = 0x%lx, size = %d bytes\n", | |
450 | (unsigned long)mem->buffer.addr, | |
451 | (int)mem->buffer.bytes); | |
1da177e4 | 452 | } |
1a60d4c5 | 453 | mutex_unlock(&list_mutex); |
ccec6e2c TI |
454 | return 0; |
455 | } | |
456 | ||
457 | static int snd_mem_proc_open(struct inode *inode, struct file *file) | |
458 | { | |
459 | return single_open(file, snd_mem_proc_read, NULL); | |
1da177e4 | 460 | } |
b6a96915 TI |
461 | |
462 | /* FIXME: for pci only - other bus? */ | |
463 | #ifdef CONFIG_PCI | |
464 | #define gettoken(bufp) strsep(bufp, " \t\n") | |
465 | ||
ccec6e2c TI |
466 | static ssize_t snd_mem_proc_write(struct file *file, const char __user * buffer, |
467 | size_t count, loff_t * ppos) | |
b6a96915 TI |
468 | { |
469 | char buf[128]; | |
470 | char *token, *p; | |
471 | ||
ccec6e2c TI |
472 | if (count > sizeof(buf) - 1) |
473 | return -EINVAL; | |
b6a96915 TI |
474 | if (copy_from_user(buf, buffer, count)) |
475 | return -EFAULT; | |
ccec6e2c | 476 | buf[count] = '\0'; |
b6a96915 TI |
477 | |
478 | p = buf; | |
479 | token = gettoken(&p); | |
480 | if (! token || *token == '#') | |
ccec6e2c | 481 | return count; |
b6a96915 TI |
482 | if (strcmp(token, "add") == 0) { |
483 | char *endp; | |
484 | int vendor, device, size, buffers; | |
485 | long mask; | |
486 | int i, alloced; | |
487 | struct pci_dev *pci; | |
488 | ||
489 | if ((token = gettoken(&p)) == NULL || | |
490 | (vendor = simple_strtol(token, NULL, 0)) <= 0 || | |
491 | (token = gettoken(&p)) == NULL || | |
492 | (device = simple_strtol(token, NULL, 0)) <= 0 || | |
493 | (token = gettoken(&p)) == NULL || | |
494 | (mask = simple_strtol(token, NULL, 0)) < 0 || | |
495 | (token = gettoken(&p)) == NULL || | |
496 | (size = memparse(token, &endp)) < 64*1024 || | |
497 | size > 16*1024*1024 /* too big */ || | |
498 | (token = gettoken(&p)) == NULL || | |
499 | (buffers = simple_strtol(token, NULL, 0)) <= 0 || | |
500 | buffers > 4) { | |
501 | printk(KERN_ERR "snd-page-alloc: invalid proc write format\n"); | |
ccec6e2c | 502 | return count; |
b6a96915 TI |
503 | } |
504 | vendor &= 0xffff; | |
505 | device &= 0xffff; | |
506 | ||
507 | alloced = 0; | |
508 | pci = NULL; | |
0dd119f7 | 509 | while ((pci = pci_get_device(vendor, device, pci)) != NULL) { |
b6a96915 TI |
510 | if (mask > 0 && mask < 0xffffffff) { |
511 | if (pci_set_dma_mask(pci, mask) < 0 || | |
512 | pci_set_consistent_dma_mask(pci, mask) < 0) { | |
513 | printk(KERN_ERR "snd-page-alloc: cannot set DMA mask %lx for pci %04x:%04x\n", mask, vendor, device); | |
df1deb67 | 514 | pci_dev_put(pci); |
ccec6e2c | 515 | return count; |
b6a96915 TI |
516 | } |
517 | } | |
518 | for (i = 0; i < buffers; i++) { | |
519 | struct snd_dma_buffer dmab; | |
520 | memset(&dmab, 0, sizeof(dmab)); | |
521 | if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci), | |
522 | size, &dmab) < 0) { | |
523 | printk(KERN_ERR "snd-page-alloc: cannot allocate buffer pages (size = %d)\n", size); | |
0dd119f7 | 524 | pci_dev_put(pci); |
ccec6e2c | 525 | return count; |
b6a96915 TI |
526 | } |
527 | snd_dma_reserve_buf(&dmab, snd_dma_pci_buf_id(pci)); | |
528 | } | |
529 | alloced++; | |
530 | } | |
531 | if (! alloced) { | |
532 | for (i = 0; i < buffers; i++) { | |
533 | struct snd_dma_buffer dmab; | |
534 | memset(&dmab, 0, sizeof(dmab)); | |
535 | /* FIXME: We can allocate only in ZONE_DMA | |
536 | * without a device pointer! | |
537 | */ | |
538 | if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, NULL, | |
539 | size, &dmab) < 0) { | |
540 | printk(KERN_ERR "snd-page-alloc: cannot allocate buffer pages (size = %d)\n", size); | |
541 | break; | |
542 | } | |
543 | snd_dma_reserve_buf(&dmab, (unsigned int)((vendor << 16) | device)); | |
544 | } | |
545 | } | |
546 | } else if (strcmp(token, "erase") == 0) | |
547 | /* FIXME: need for releasing each buffer chunk? */ | |
548 | free_all_reserved_pages(); | |
549 | else | |
550 | printk(KERN_ERR "snd-page-alloc: invalid proc cmd\n"); | |
ccec6e2c | 551 | return count; |
b6a96915 TI |
552 | } |
553 | #endif /* CONFIG_PCI */ | |
ccec6e2c TI |
554 | |
555 | static const struct file_operations snd_mem_proc_fops = { | |
556 | .owner = THIS_MODULE, | |
557 | .open = snd_mem_proc_open, | |
558 | .read = seq_read, | |
559 | #ifdef CONFIG_PCI | |
560 | .write = snd_mem_proc_write, | |
561 | #endif | |
562 | .llseek = seq_lseek, | |
563 | .release = single_release, | |
564 | }; | |
565 | ||
1da177e4 LT |
566 | #endif /* CONFIG_PROC_FS */ |
567 | ||
568 | /* | |
569 | * module entry | |
570 | */ | |
571 | ||
572 | static int __init snd_mem_init(void) | |
573 | { | |
574 | #ifdef CONFIG_PROC_FS | |
7bf4e6d3 DL |
575 | snd_mem_proc = proc_create(SND_MEM_PROC_FILE, 0644, NULL, |
576 | &snd_mem_proc_fops); | |
1da177e4 | 577 | #endif |
1da177e4 LT |
578 | return 0; |
579 | } | |
580 | ||
581 | static void __exit snd_mem_exit(void) | |
582 | { | |
e0be4d32 | 583 | remove_proc_entry(SND_MEM_PROC_FILE, NULL); |
1da177e4 LT |
584 | free_all_reserved_pages(); |
585 | if (snd_allocated_pages > 0) | |
586 | printk(KERN_ERR "snd-malloc: Memory leak? pages not freed = %li\n", snd_allocated_pages); | |
587 | } | |
588 | ||
589 | ||
590 | module_init(snd_mem_init) | |
591 | module_exit(snd_mem_exit) | |
592 | ||
593 | ||
594 | /* | |
595 | * exports | |
596 | */ | |
597 | EXPORT_SYMBOL(snd_dma_alloc_pages); | |
598 | EXPORT_SYMBOL(snd_dma_alloc_pages_fallback); | |
599 | EXPORT_SYMBOL(snd_dma_free_pages); | |
600 | ||
601 | EXPORT_SYMBOL(snd_dma_get_reserved_buf); | |
602 | EXPORT_SYMBOL(snd_dma_reserve_buf); | |
603 | ||
604 | EXPORT_SYMBOL(snd_malloc_pages); | |
605 | EXPORT_SYMBOL(snd_free_pages); |