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