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1da177e4 LT |
1 | /* |
2 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
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> | |
b6a96915 | 30 | #include <asm/uaccess.h> |
1da177e4 LT |
31 | #include <linux/dma-mapping.h> |
32 | #include <linux/moduleparam.h> | |
1a60d4c5 | 33 | #include <linux/mutex.h> |
1da177e4 LT |
34 | #include <sound/memalloc.h> |
35 | #ifdef CONFIG_SBUS | |
36 | #include <asm/sbus.h> | |
37 | #endif | |
38 | ||
39 | ||
40 | MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>, Jaroslav Kysela <perex@suse.cz>"); | |
41 | MODULE_DESCRIPTION("Memory allocator for ALSA system."); | |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
44 | ||
1da177e4 LT |
45 | /* |
46 | */ | |
47 | ||
48 | void *snd_malloc_sgbuf_pages(struct device *device, | |
49 | size_t size, struct snd_dma_buffer *dmab, | |
50 | size_t *res_size); | |
51 | int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab); | |
52 | ||
53 | /* | |
54 | */ | |
55 | ||
1a60d4c5 | 56 | static DEFINE_MUTEX(list_mutex); |
1da177e4 LT |
57 | static LIST_HEAD(mem_list_head); |
58 | ||
59 | /* buffer preservation list */ | |
60 | struct snd_mem_list { | |
61 | struct snd_dma_buffer buffer; | |
62 | unsigned int id; | |
63 | struct list_head list; | |
64 | }; | |
65 | ||
66 | /* id for pre-allocated buffers */ | |
67 | #define SNDRV_DMA_DEVICE_UNUSED (unsigned int)-1 | |
68 | ||
69 | #ifdef CONFIG_SND_DEBUG | |
70 | #define __ASTRING__(x) #x | |
71 | #define snd_assert(expr, args...) do {\ | |
72 | if (!(expr)) {\ | |
73 | printk(KERN_ERR "snd-malloc: BUG? (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\ | |
74 | args;\ | |
75 | }\ | |
76 | } while (0) | |
77 | #else | |
78 | #define snd_assert(expr, args...) /**/ | |
79 | #endif | |
80 | ||
81 | /* | |
82 | * Hacks | |
83 | */ | |
84 | ||
ea50888d | 85 | #if defined(__i386__) |
1da177e4 LT |
86 | /* |
87 | * A hack to allocate large buffers via dma_alloc_coherent() | |
88 | * | |
89 | * since dma_alloc_coherent always tries GFP_DMA when the requested | |
90 | * pci memory region is below 32bit, it happens quite often that even | |
91 | * 2 order of pages cannot be allocated. | |
92 | * | |
93 | * so in the following, we allocate at first without dma_mask, so that | |
94 | * allocation will be done without GFP_DMA. if the area doesn't match | |
95 | * with the requested region, then realloate with the original dma_mask | |
96 | * again. | |
97 | * | |
98 | * Really, we want to move this type of thing into dma_alloc_coherent() | |
99 | * so dma_mask doesn't have to be messed with. | |
100 | */ | |
101 | ||
102 | static void *snd_dma_hack_alloc_coherent(struct device *dev, size_t size, | |
5a0f217d | 103 | dma_addr_t *dma_handle, |
dd0fc66f | 104 | gfp_t flags) |
1da177e4 LT |
105 | { |
106 | void *ret; | |
107 | u64 dma_mask, coherent_dma_mask; | |
108 | ||
109 | if (dev == NULL || !dev->dma_mask) | |
110 | return dma_alloc_coherent(dev, size, dma_handle, flags); | |
111 | dma_mask = *dev->dma_mask; | |
112 | coherent_dma_mask = dev->coherent_dma_mask; | |
113 | *dev->dma_mask = 0xffffffff; /* do without masking */ | |
114 | dev->coherent_dma_mask = 0xffffffff; /* do without masking */ | |
115 | ret = dma_alloc_coherent(dev, size, dma_handle, flags); | |
116 | *dev->dma_mask = dma_mask; /* restore */ | |
117 | dev->coherent_dma_mask = coherent_dma_mask; /* restore */ | |
118 | if (ret) { | |
119 | /* obtained address is out of range? */ | |
120 | if (((unsigned long)*dma_handle + size - 1) & ~dma_mask) { | |
121 | /* reallocate with the proper mask */ | |
122 | dma_free_coherent(dev, size, ret, *dma_handle); | |
123 | ret = dma_alloc_coherent(dev, size, dma_handle, flags); | |
124 | } | |
125 | } else { | |
126 | /* wish to success now with the proper mask... */ | |
127 | if (dma_mask != 0xffffffffUL) { | |
128 | /* allocation with GFP_ATOMIC to avoid the long stall */ | |
129 | flags &= ~GFP_KERNEL; | |
130 | flags |= GFP_ATOMIC; | |
131 | ret = dma_alloc_coherent(dev, size, dma_handle, flags); | |
132 | } | |
133 | } | |
134 | return ret; | |
135 | } | |
136 | ||
137 | /* redefine dma_alloc_coherent for some architectures */ | |
138 | #undef dma_alloc_coherent | |
139 | #define dma_alloc_coherent snd_dma_hack_alloc_coherent | |
140 | ||
141 | #endif /* arch */ | |
142 | ||
1da177e4 LT |
143 | /* |
144 | * | |
145 | * Generic memory allocators | |
146 | * | |
147 | */ | |
148 | ||
149 | static long snd_allocated_pages; /* holding the number of allocated pages */ | |
150 | ||
151 | static inline void inc_snd_pages(int order) | |
152 | { | |
153 | snd_allocated_pages += 1 << order; | |
154 | } | |
155 | ||
156 | static inline void dec_snd_pages(int order) | |
157 | { | |
158 | snd_allocated_pages -= 1 << order; | |
159 | } | |
160 | ||
1da177e4 LT |
161 | /** |
162 | * snd_malloc_pages - allocate pages with the given size | |
163 | * @size: the size to allocate in bytes | |
164 | * @gfp_flags: the allocation conditions, GFP_XXX | |
165 | * | |
166 | * Allocates the physically contiguous pages with the given size. | |
167 | * | |
168 | * Returns the pointer of the buffer, or NULL if no enoguh memory. | |
169 | */ | |
1ef64e67 | 170 | void *snd_malloc_pages(size_t size, gfp_t gfp_flags) |
1da177e4 LT |
171 | { |
172 | int pg; | |
173 | void *res; | |
174 | ||
175 | snd_assert(size > 0, return NULL); | |
176 | snd_assert(gfp_flags != 0, return NULL); | |
f3d48f03 | 177 | gfp_flags |= __GFP_COMP; /* compound page lets parts be mapped */ |
1da177e4 | 178 | pg = get_order(size); |
2ba8c15c | 179 | if ((res = (void *) __get_free_pages(gfp_flags, pg)) != NULL) |
1da177e4 | 180 | inc_snd_pages(pg); |
1da177e4 LT |
181 | return res; |
182 | } | |
183 | ||
184 | /** | |
185 | * snd_free_pages - release the pages | |
186 | * @ptr: the buffer pointer to release | |
187 | * @size: the allocated buffer size | |
188 | * | |
189 | * Releases the buffer allocated via snd_malloc_pages(). | |
190 | */ | |
191 | void snd_free_pages(void *ptr, size_t size) | |
192 | { | |
193 | int pg; | |
194 | ||
195 | if (ptr == NULL) | |
196 | return; | |
197 | pg = get_order(size); | |
198 | dec_snd_pages(pg); | |
1da177e4 LT |
199 | free_pages((unsigned long) ptr, pg); |
200 | } | |
201 | ||
202 | /* | |
203 | * | |
204 | * Bus-specific memory allocators | |
205 | * | |
206 | */ | |
207 | ||
208 | /* allocate the coherent DMA pages */ | |
209 | static void *snd_malloc_dev_pages(struct device *dev, size_t size, dma_addr_t *dma) | |
210 | { | |
211 | int pg; | |
212 | void *res; | |
1ef64e67 | 213 | gfp_t gfp_flags; |
1da177e4 LT |
214 | |
215 | snd_assert(size > 0, return NULL); | |
216 | snd_assert(dma != NULL, return NULL); | |
217 | pg = get_order(size); | |
218 | gfp_flags = GFP_KERNEL | |
f3d48f03 | 219 | | __GFP_COMP /* compound page lets parts be mapped */ |
1da177e4 LT |
220 | | __GFP_NORETRY /* don't trigger OOM-killer */ |
221 | | __GFP_NOWARN; /* no stack trace print - this call is non-critical */ | |
222 | res = dma_alloc_coherent(dev, PAGE_SIZE << pg, dma, gfp_flags); | |
2ba8c15c | 223 | if (res != NULL) |
1da177e4 | 224 | inc_snd_pages(pg); |
1da177e4 LT |
225 | |
226 | return res; | |
227 | } | |
228 | ||
229 | /* free the coherent DMA pages */ | |
230 | static void snd_free_dev_pages(struct device *dev, size_t size, void *ptr, | |
231 | dma_addr_t dma) | |
232 | { | |
233 | int pg; | |
234 | ||
235 | if (ptr == NULL) | |
236 | return; | |
237 | pg = get_order(size); | |
238 | dec_snd_pages(pg); | |
1da177e4 LT |
239 | dma_free_coherent(dev, PAGE_SIZE << pg, ptr, dma); |
240 | } | |
241 | ||
242 | #ifdef CONFIG_SBUS | |
243 | ||
244 | static void *snd_malloc_sbus_pages(struct device *dev, size_t size, | |
245 | dma_addr_t *dma_addr) | |
246 | { | |
247 | struct sbus_dev *sdev = (struct sbus_dev *)dev; | |
248 | int pg; | |
249 | void *res; | |
250 | ||
251 | snd_assert(size > 0, return NULL); | |
252 | snd_assert(dma_addr != NULL, return NULL); | |
253 | pg = get_order(size); | |
254 | res = sbus_alloc_consistent(sdev, PAGE_SIZE * (1 << pg), dma_addr); | |
255 | if (res != NULL) | |
256 | inc_snd_pages(pg); | |
257 | return res; | |
258 | } | |
259 | ||
260 | static void snd_free_sbus_pages(struct device *dev, size_t size, | |
261 | void *ptr, dma_addr_t dma_addr) | |
262 | { | |
263 | struct sbus_dev *sdev = (struct sbus_dev *)dev; | |
264 | int pg; | |
265 | ||
266 | if (ptr == NULL) | |
267 | return; | |
268 | pg = get_order(size); | |
269 | dec_snd_pages(pg); | |
270 | sbus_free_consistent(sdev, PAGE_SIZE * (1 << pg), ptr, dma_addr); | |
271 | } | |
272 | ||
273 | #endif /* CONFIG_SBUS */ | |
274 | ||
275 | /* | |
276 | * | |
277 | * ALSA generic memory management | |
278 | * | |
279 | */ | |
280 | ||
281 | ||
282 | /** | |
283 | * snd_dma_alloc_pages - allocate the buffer area according to the given type | |
284 | * @type: the DMA buffer type | |
285 | * @device: the device pointer | |
286 | * @size: the buffer size to allocate | |
287 | * @dmab: buffer allocation record to store the allocated data | |
288 | * | |
289 | * Calls the memory-allocator function for the corresponding | |
290 | * buffer type. | |
291 | * | |
292 | * Returns zero if the buffer with the given size is allocated successfuly, | |
293 | * other a negative value at error. | |
294 | */ | |
295 | int snd_dma_alloc_pages(int type, struct device *device, size_t size, | |
296 | struct snd_dma_buffer *dmab) | |
297 | { | |
298 | snd_assert(size > 0, return -ENXIO); | |
299 | snd_assert(dmab != NULL, return -ENXIO); | |
300 | ||
301 | dmab->dev.type = type; | |
302 | dmab->dev.dev = device; | |
303 | dmab->bytes = 0; | |
304 | switch (type) { | |
305 | case SNDRV_DMA_TYPE_CONTINUOUS: | |
306 | dmab->area = snd_malloc_pages(size, (unsigned long)device); | |
307 | dmab->addr = 0; | |
308 | break; | |
309 | #ifdef CONFIG_SBUS | |
310 | case SNDRV_DMA_TYPE_SBUS: | |
311 | dmab->area = snd_malloc_sbus_pages(device, size, &dmab->addr); | |
312 | break; | |
313 | #endif | |
314 | case SNDRV_DMA_TYPE_DEV: | |
315 | dmab->area = snd_malloc_dev_pages(device, size, &dmab->addr); | |
316 | break; | |
317 | case SNDRV_DMA_TYPE_DEV_SG: | |
318 | snd_malloc_sgbuf_pages(device, size, dmab, NULL); | |
319 | break; | |
320 | default: | |
321 | printk(KERN_ERR "snd-malloc: invalid device type %d\n", type); | |
322 | dmab->area = NULL; | |
323 | dmab->addr = 0; | |
324 | return -ENXIO; | |
325 | } | |
326 | if (! dmab->area) | |
327 | return -ENOMEM; | |
328 | dmab->bytes = size; | |
329 | return 0; | |
330 | } | |
331 | ||
332 | /** | |
333 | * snd_dma_alloc_pages_fallback - allocate the buffer area according to the given type with fallback | |
334 | * @type: the DMA buffer type | |
335 | * @device: the device pointer | |
336 | * @size: the buffer size to allocate | |
337 | * @dmab: buffer allocation record to store the allocated data | |
338 | * | |
339 | * Calls the memory-allocator function for the corresponding | |
340 | * buffer type. When no space is left, this function reduces the size and | |
341 | * tries to allocate again. The size actually allocated is stored in | |
342 | * res_size argument. | |
343 | * | |
344 | * Returns zero if the buffer with the given size is allocated successfuly, | |
345 | * other a negative value at error. | |
346 | */ | |
347 | int snd_dma_alloc_pages_fallback(int type, struct device *device, size_t size, | |
348 | struct snd_dma_buffer *dmab) | |
349 | { | |
350 | int err; | |
351 | ||
352 | snd_assert(size > 0, return -ENXIO); | |
353 | snd_assert(dmab != NULL, return -ENXIO); | |
354 | ||
355 | while ((err = snd_dma_alloc_pages(type, device, size, dmab)) < 0) { | |
356 | if (err != -ENOMEM) | |
357 | return err; | |
358 | size >>= 1; | |
359 | if (size <= PAGE_SIZE) | |
360 | return -ENOMEM; | |
361 | } | |
362 | if (! dmab->area) | |
363 | return -ENOMEM; | |
364 | return 0; | |
365 | } | |
366 | ||
367 | ||
368 | /** | |
369 | * snd_dma_free_pages - release the allocated buffer | |
370 | * @dmab: the buffer allocation record to release | |
371 | * | |
372 | * Releases the allocated buffer via snd_dma_alloc_pages(). | |
373 | */ | |
374 | void snd_dma_free_pages(struct snd_dma_buffer *dmab) | |
375 | { | |
376 | switch (dmab->dev.type) { | |
377 | case SNDRV_DMA_TYPE_CONTINUOUS: | |
378 | snd_free_pages(dmab->area, dmab->bytes); | |
379 | break; | |
380 | #ifdef CONFIG_SBUS | |
381 | case SNDRV_DMA_TYPE_SBUS: | |
382 | snd_free_sbus_pages(dmab->dev.dev, dmab->bytes, dmab->area, dmab->addr); | |
383 | break; | |
384 | #endif | |
385 | case SNDRV_DMA_TYPE_DEV: | |
386 | snd_free_dev_pages(dmab->dev.dev, dmab->bytes, dmab->area, dmab->addr); | |
387 | break; | |
388 | case SNDRV_DMA_TYPE_DEV_SG: | |
389 | snd_free_sgbuf_pages(dmab); | |
390 | break; | |
391 | default: | |
392 | printk(KERN_ERR "snd-malloc: invalid device type %d\n", dmab->dev.type); | |
393 | } | |
394 | } | |
395 | ||
396 | ||
397 | /** | |
398 | * snd_dma_get_reserved - get the reserved buffer for the given device | |
399 | * @dmab: the buffer allocation record to store | |
400 | * @id: the buffer id | |
401 | * | |
402 | * Looks for the reserved-buffer list and re-uses if the same buffer | |
403 | * is found in the list. When the buffer is found, it's removed from the free list. | |
404 | * | |
405 | * Returns the size of buffer if the buffer is found, or zero if not found. | |
406 | */ | |
407 | size_t snd_dma_get_reserved_buf(struct snd_dma_buffer *dmab, unsigned int id) | |
408 | { | |
1da177e4 LT |
409 | struct snd_mem_list *mem; |
410 | ||
411 | snd_assert(dmab, return 0); | |
412 | ||
1a60d4c5 | 413 | mutex_lock(&list_mutex); |
9244b2c3 | 414 | list_for_each_entry(mem, &mem_list_head, list) { |
1da177e4 | 415 | if (mem->id == id && |
b6a96915 TI |
416 | (mem->buffer.dev.dev == NULL || dmab->dev.dev == NULL || |
417 | ! memcmp(&mem->buffer.dev, &dmab->dev, sizeof(dmab->dev)))) { | |
418 | struct device *dev = dmab->dev.dev; | |
9244b2c3 | 419 | list_del(&mem->list); |
1da177e4 | 420 | *dmab = mem->buffer; |
b6a96915 TI |
421 | if (dmab->dev.dev == NULL) |
422 | dmab->dev.dev = dev; | |
1da177e4 | 423 | kfree(mem); |
1a60d4c5 | 424 | mutex_unlock(&list_mutex); |
1da177e4 LT |
425 | return dmab->bytes; |
426 | } | |
427 | } | |
1a60d4c5 | 428 | mutex_unlock(&list_mutex); |
1da177e4 LT |
429 | return 0; |
430 | } | |
431 | ||
432 | /** | |
433 | * snd_dma_reserve_buf - reserve the buffer | |
434 | * @dmab: the buffer to reserve | |
435 | * @id: the buffer id | |
436 | * | |
437 | * Reserves the given buffer as a reserved buffer. | |
438 | * | |
439 | * Returns zero if successful, or a negative code at error. | |
440 | */ | |
441 | int snd_dma_reserve_buf(struct snd_dma_buffer *dmab, unsigned int id) | |
442 | { | |
443 | struct snd_mem_list *mem; | |
444 | ||
445 | snd_assert(dmab, return -EINVAL); | |
446 | mem = kmalloc(sizeof(*mem), GFP_KERNEL); | |
447 | if (! mem) | |
448 | return -ENOMEM; | |
1a60d4c5 | 449 | mutex_lock(&list_mutex); |
1da177e4 LT |
450 | mem->buffer = *dmab; |
451 | mem->id = id; | |
452 | list_add_tail(&mem->list, &mem_list_head); | |
1a60d4c5 | 453 | mutex_unlock(&list_mutex); |
1da177e4 LT |
454 | return 0; |
455 | } | |
456 | ||
457 | /* | |
458 | * purge all reserved buffers | |
459 | */ | |
460 | static void free_all_reserved_pages(void) | |
461 | { | |
462 | struct list_head *p; | |
463 | struct snd_mem_list *mem; | |
464 | ||
1a60d4c5 | 465 | mutex_lock(&list_mutex); |
1da177e4 LT |
466 | while (! list_empty(&mem_list_head)) { |
467 | p = mem_list_head.next; | |
468 | mem = list_entry(p, struct snd_mem_list, list); | |
469 | list_del(p); | |
470 | snd_dma_free_pages(&mem->buffer); | |
471 | kfree(mem); | |
472 | } | |
1a60d4c5 | 473 | mutex_unlock(&list_mutex); |
1da177e4 LT |
474 | } |
475 | ||
476 | ||
1da177e4 LT |
477 | #ifdef CONFIG_PROC_FS |
478 | /* | |
479 | * proc file interface | |
480 | */ | |
b6a96915 | 481 | #define SND_MEM_PROC_FILE "driver/snd-page-alloc" |
a53fc188 | 482 | static struct proc_dir_entry *snd_mem_proc; |
b6a96915 | 483 | |
1da177e4 LT |
484 | static int snd_mem_proc_read(char *page, char **start, off_t off, |
485 | int count, int *eof, void *data) | |
486 | { | |
487 | int len = 0; | |
488 | long pages = snd_allocated_pages >> (PAGE_SHIFT-12); | |
1da177e4 LT |
489 | struct snd_mem_list *mem; |
490 | int devno; | |
491 | static char *types[] = { "UNKNOWN", "CONT", "DEV", "DEV-SG", "SBUS" }; | |
492 | ||
1a60d4c5 | 493 | mutex_lock(&list_mutex); |
1da177e4 LT |
494 | len += snprintf(page + len, count - len, |
495 | "pages : %li bytes (%li pages per %likB)\n", | |
496 | pages * PAGE_SIZE, pages, PAGE_SIZE / 1024); | |
497 | devno = 0; | |
9244b2c3 | 498 | list_for_each_entry(mem, &mem_list_head, list) { |
1da177e4 LT |
499 | devno++; |
500 | len += snprintf(page + len, count - len, | |
501 | "buffer %d : ID %08x : type %s\n", | |
502 | devno, mem->id, types[mem->buffer.dev.type]); | |
503 | len += snprintf(page + len, count - len, | |
504 | " addr = 0x%lx, size = %d bytes\n", | |
505 | (unsigned long)mem->buffer.addr, (int)mem->buffer.bytes); | |
506 | } | |
1a60d4c5 | 507 | mutex_unlock(&list_mutex); |
1da177e4 LT |
508 | return len; |
509 | } | |
b6a96915 TI |
510 | |
511 | /* FIXME: for pci only - other bus? */ | |
512 | #ifdef CONFIG_PCI | |
513 | #define gettoken(bufp) strsep(bufp, " \t\n") | |
514 | ||
515 | static int snd_mem_proc_write(struct file *file, const char __user *buffer, | |
516 | unsigned long count, void *data) | |
517 | { | |
518 | char buf[128]; | |
519 | char *token, *p; | |
520 | ||
521 | if (count > ARRAY_SIZE(buf) - 1) | |
522 | count = ARRAY_SIZE(buf) - 1; | |
523 | if (copy_from_user(buf, buffer, count)) | |
524 | return -EFAULT; | |
525 | buf[ARRAY_SIZE(buf) - 1] = '\0'; | |
526 | ||
527 | p = buf; | |
528 | token = gettoken(&p); | |
529 | if (! token || *token == '#') | |
530 | return (int)count; | |
531 | if (strcmp(token, "add") == 0) { | |
532 | char *endp; | |
533 | int vendor, device, size, buffers; | |
534 | long mask; | |
535 | int i, alloced; | |
536 | struct pci_dev *pci; | |
537 | ||
538 | if ((token = gettoken(&p)) == NULL || | |
539 | (vendor = simple_strtol(token, NULL, 0)) <= 0 || | |
540 | (token = gettoken(&p)) == NULL || | |
541 | (device = simple_strtol(token, NULL, 0)) <= 0 || | |
542 | (token = gettoken(&p)) == NULL || | |
543 | (mask = simple_strtol(token, NULL, 0)) < 0 || | |
544 | (token = gettoken(&p)) == NULL || | |
545 | (size = memparse(token, &endp)) < 64*1024 || | |
546 | size > 16*1024*1024 /* too big */ || | |
547 | (token = gettoken(&p)) == NULL || | |
548 | (buffers = simple_strtol(token, NULL, 0)) <= 0 || | |
549 | buffers > 4) { | |
550 | printk(KERN_ERR "snd-page-alloc: invalid proc write format\n"); | |
551 | return (int)count; | |
552 | } | |
553 | vendor &= 0xffff; | |
554 | device &= 0xffff; | |
555 | ||
556 | alloced = 0; | |
557 | pci = NULL; | |
0dd119f7 | 558 | while ((pci = pci_get_device(vendor, device, pci)) != NULL) { |
b6a96915 TI |
559 | if (mask > 0 && mask < 0xffffffff) { |
560 | if (pci_set_dma_mask(pci, mask) < 0 || | |
561 | pci_set_consistent_dma_mask(pci, mask) < 0) { | |
562 | printk(KERN_ERR "snd-page-alloc: cannot set DMA mask %lx for pci %04x:%04x\n", mask, vendor, device); | |
563 | return (int)count; | |
564 | } | |
565 | } | |
566 | for (i = 0; i < buffers; i++) { | |
567 | struct snd_dma_buffer dmab; | |
568 | memset(&dmab, 0, sizeof(dmab)); | |
569 | if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci), | |
570 | size, &dmab) < 0) { | |
571 | printk(KERN_ERR "snd-page-alloc: cannot allocate buffer pages (size = %d)\n", size); | |
0dd119f7 | 572 | pci_dev_put(pci); |
b6a96915 TI |
573 | return (int)count; |
574 | } | |
575 | snd_dma_reserve_buf(&dmab, snd_dma_pci_buf_id(pci)); | |
576 | } | |
577 | alloced++; | |
578 | } | |
579 | if (! alloced) { | |
580 | for (i = 0; i < buffers; i++) { | |
581 | struct snd_dma_buffer dmab; | |
582 | memset(&dmab, 0, sizeof(dmab)); | |
583 | /* FIXME: We can allocate only in ZONE_DMA | |
584 | * without a device pointer! | |
585 | */ | |
586 | if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, NULL, | |
587 | size, &dmab) < 0) { | |
588 | printk(KERN_ERR "snd-page-alloc: cannot allocate buffer pages (size = %d)\n", size); | |
589 | break; | |
590 | } | |
591 | snd_dma_reserve_buf(&dmab, (unsigned int)((vendor << 16) | device)); | |
592 | } | |
593 | } | |
594 | } else if (strcmp(token, "erase") == 0) | |
595 | /* FIXME: need for releasing each buffer chunk? */ | |
596 | free_all_reserved_pages(); | |
597 | else | |
598 | printk(KERN_ERR "snd-page-alloc: invalid proc cmd\n"); | |
599 | return (int)count; | |
600 | } | |
601 | #endif /* CONFIG_PCI */ | |
1da177e4 LT |
602 | #endif /* CONFIG_PROC_FS */ |
603 | ||
604 | /* | |
605 | * module entry | |
606 | */ | |
607 | ||
608 | static int __init snd_mem_init(void) | |
609 | { | |
610 | #ifdef CONFIG_PROC_FS | |
b6a96915 TI |
611 | snd_mem_proc = create_proc_entry(SND_MEM_PROC_FILE, 0644, NULL); |
612 | if (snd_mem_proc) { | |
613 | snd_mem_proc->read_proc = snd_mem_proc_read; | |
614 | #ifdef CONFIG_PCI | |
615 | snd_mem_proc->write_proc = snd_mem_proc_write; | |
616 | #endif | |
617 | } | |
1da177e4 | 618 | #endif |
1da177e4 LT |
619 | return 0; |
620 | } | |
621 | ||
622 | static void __exit snd_mem_exit(void) | |
623 | { | |
e0be4d32 | 624 | remove_proc_entry(SND_MEM_PROC_FILE, NULL); |
1da177e4 LT |
625 | free_all_reserved_pages(); |
626 | if (snd_allocated_pages > 0) | |
627 | printk(KERN_ERR "snd-malloc: Memory leak? pages not freed = %li\n", snd_allocated_pages); | |
628 | } | |
629 | ||
630 | ||
631 | module_init(snd_mem_init) | |
632 | module_exit(snd_mem_exit) | |
633 | ||
634 | ||
635 | /* | |
636 | * exports | |
637 | */ | |
638 | EXPORT_SYMBOL(snd_dma_alloc_pages); | |
639 | EXPORT_SYMBOL(snd_dma_alloc_pages_fallback); | |
640 | EXPORT_SYMBOL(snd_dma_free_pages); | |
641 | ||
642 | EXPORT_SYMBOL(snd_dma_get_reserved_buf); | |
643 | EXPORT_SYMBOL(snd_dma_reserve_buf); | |
644 | ||
645 | EXPORT_SYMBOL(snd_malloc_pages); | |
646 | EXPORT_SYMBOL(snd_free_pages); |