Commit | Line | Data |
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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 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 | ||
82 | /* | |
83 | * Hacks | |
84 | */ | |
85 | ||
ea50888d | 86 | #if defined(__i386__) |
1da177e4 LT |
87 | /* |
88 | * A hack to allocate large buffers via dma_alloc_coherent() | |
89 | * | |
90 | * since dma_alloc_coherent always tries GFP_DMA when the requested | |
91 | * pci memory region is below 32bit, it happens quite often that even | |
92 | * 2 order of pages cannot be allocated. | |
93 | * | |
94 | * so in the following, we allocate at first without dma_mask, so that | |
95 | * allocation will be done without GFP_DMA. if the area doesn't match | |
96 | * with the requested region, then realloate with the original dma_mask | |
97 | * again. | |
98 | * | |
99 | * Really, we want to move this type of thing into dma_alloc_coherent() | |
100 | * so dma_mask doesn't have to be messed with. | |
101 | */ | |
102 | ||
103 | static void *snd_dma_hack_alloc_coherent(struct device *dev, size_t size, | |
5a0f217d | 104 | dma_addr_t *dma_handle, |
dd0fc66f | 105 | gfp_t flags) |
1da177e4 LT |
106 | { |
107 | void *ret; | |
108 | u64 dma_mask, coherent_dma_mask; | |
109 | ||
110 | if (dev == NULL || !dev->dma_mask) | |
111 | return dma_alloc_coherent(dev, size, dma_handle, flags); | |
112 | dma_mask = *dev->dma_mask; | |
113 | coherent_dma_mask = dev->coherent_dma_mask; | |
114 | *dev->dma_mask = 0xffffffff; /* do without masking */ | |
115 | dev->coherent_dma_mask = 0xffffffff; /* do without masking */ | |
116 | ret = dma_alloc_coherent(dev, size, dma_handle, flags); | |
117 | *dev->dma_mask = dma_mask; /* restore */ | |
118 | dev->coherent_dma_mask = coherent_dma_mask; /* restore */ | |
119 | if (ret) { | |
120 | /* obtained address is out of range? */ | |
121 | if (((unsigned long)*dma_handle + size - 1) & ~dma_mask) { | |
122 | /* reallocate with the proper mask */ | |
123 | dma_free_coherent(dev, size, ret, *dma_handle); | |
124 | ret = dma_alloc_coherent(dev, size, dma_handle, flags); | |
125 | } | |
126 | } else { | |
127 | /* wish to success now with the proper mask... */ | |
128 | if (dma_mask != 0xffffffffUL) { | |
129 | /* allocation with GFP_ATOMIC to avoid the long stall */ | |
130 | flags &= ~GFP_KERNEL; | |
131 | flags |= GFP_ATOMIC; | |
132 | ret = dma_alloc_coherent(dev, size, dma_handle, flags); | |
133 | } | |
134 | } | |
135 | return ret; | |
136 | } | |
137 | ||
138 | /* redefine dma_alloc_coherent for some architectures */ | |
139 | #undef dma_alloc_coherent | |
140 | #define dma_alloc_coherent snd_dma_hack_alloc_coherent | |
141 | ||
142 | #endif /* arch */ | |
143 | ||
1da177e4 LT |
144 | /* |
145 | * | |
146 | * Generic memory allocators | |
147 | * | |
148 | */ | |
149 | ||
150 | static long snd_allocated_pages; /* holding the number of allocated pages */ | |
151 | ||
152 | static inline void inc_snd_pages(int order) | |
153 | { | |
154 | snd_allocated_pages += 1 << order; | |
155 | } | |
156 | ||
157 | static inline void dec_snd_pages(int order) | |
158 | { | |
159 | snd_allocated_pages -= 1 << order; | |
160 | } | |
161 | ||
1da177e4 LT |
162 | /** |
163 | * snd_malloc_pages - allocate pages with the given size | |
164 | * @size: the size to allocate in bytes | |
165 | * @gfp_flags: the allocation conditions, GFP_XXX | |
166 | * | |
167 | * Allocates the physically contiguous pages with the given size. | |
168 | * | |
169 | * Returns the pointer of the buffer, or NULL if no enoguh memory. | |
170 | */ | |
1ef64e67 | 171 | void *snd_malloc_pages(size_t size, gfp_t gfp_flags) |
1da177e4 LT |
172 | { |
173 | int pg; | |
174 | void *res; | |
175 | ||
176 | snd_assert(size > 0, return NULL); | |
177 | snd_assert(gfp_flags != 0, return NULL); | |
f3d48f03 | 178 | gfp_flags |= __GFP_COMP; /* compound page lets parts be mapped */ |
1da177e4 | 179 | pg = get_order(size); |
2ba8c15c | 180 | if ((res = (void *) __get_free_pages(gfp_flags, pg)) != NULL) |
1da177e4 | 181 | inc_snd_pages(pg); |
1da177e4 LT |
182 | return res; |
183 | } | |
184 | ||
185 | /** | |
186 | * snd_free_pages - release the pages | |
187 | * @ptr: the buffer pointer to release | |
188 | * @size: the allocated buffer size | |
189 | * | |
190 | * Releases the buffer allocated via snd_malloc_pages(). | |
191 | */ | |
192 | void snd_free_pages(void *ptr, size_t size) | |
193 | { | |
194 | int pg; | |
195 | ||
196 | if (ptr == NULL) | |
197 | return; | |
198 | pg = get_order(size); | |
199 | dec_snd_pages(pg); | |
1da177e4 LT |
200 | free_pages((unsigned long) ptr, pg); |
201 | } | |
202 | ||
203 | /* | |
204 | * | |
205 | * Bus-specific memory allocators | |
206 | * | |
207 | */ | |
208 | ||
8f11551b | 209 | #ifdef CONFIG_HAS_DMA |
1da177e4 LT |
210 | /* allocate the coherent DMA pages */ |
211 | static void *snd_malloc_dev_pages(struct device *dev, size_t size, dma_addr_t *dma) | |
212 | { | |
213 | int pg; | |
214 | void *res; | |
1ef64e67 | 215 | gfp_t gfp_flags; |
1da177e4 LT |
216 | |
217 | snd_assert(size > 0, return NULL); | |
218 | snd_assert(dma != NULL, return NULL); | |
219 | pg = get_order(size); | |
220 | gfp_flags = GFP_KERNEL | |
f3d48f03 | 221 | | __GFP_COMP /* compound page lets parts be mapped */ |
1da177e4 LT |
222 | | __GFP_NORETRY /* don't trigger OOM-killer */ |
223 | | __GFP_NOWARN; /* no stack trace print - this call is non-critical */ | |
224 | res = dma_alloc_coherent(dev, PAGE_SIZE << pg, dma, gfp_flags); | |
2ba8c15c | 225 | if (res != NULL) |
1da177e4 | 226 | inc_snd_pages(pg); |
1da177e4 LT |
227 | |
228 | return res; | |
229 | } | |
230 | ||
231 | /* free the coherent DMA pages */ | |
232 | static void snd_free_dev_pages(struct device *dev, size_t size, void *ptr, | |
233 | dma_addr_t dma) | |
234 | { | |
235 | int pg; | |
236 | ||
237 | if (ptr == NULL) | |
238 | return; | |
239 | pg = get_order(size); | |
240 | dec_snd_pages(pg); | |
1da177e4 LT |
241 | dma_free_coherent(dev, PAGE_SIZE << pg, ptr, dma); |
242 | } | |
8f11551b | 243 | #endif /* CONFIG_HAS_DMA */ |
1da177e4 LT |
244 | |
245 | #ifdef CONFIG_SBUS | |
246 | ||
247 | static void *snd_malloc_sbus_pages(struct device *dev, size_t size, | |
248 | dma_addr_t *dma_addr) | |
249 | { | |
250 | struct sbus_dev *sdev = (struct sbus_dev *)dev; | |
251 | int pg; | |
252 | void *res; | |
253 | ||
254 | snd_assert(size > 0, return NULL); | |
255 | snd_assert(dma_addr != NULL, return NULL); | |
256 | pg = get_order(size); | |
257 | res = sbus_alloc_consistent(sdev, PAGE_SIZE * (1 << pg), dma_addr); | |
258 | if (res != NULL) | |
259 | inc_snd_pages(pg); | |
260 | return res; | |
261 | } | |
262 | ||
263 | static void snd_free_sbus_pages(struct device *dev, size_t size, | |
264 | void *ptr, dma_addr_t dma_addr) | |
265 | { | |
266 | struct sbus_dev *sdev = (struct sbus_dev *)dev; | |
267 | int pg; | |
268 | ||
269 | if (ptr == NULL) | |
270 | return; | |
271 | pg = get_order(size); | |
272 | dec_snd_pages(pg); | |
273 | sbus_free_consistent(sdev, PAGE_SIZE * (1 << pg), ptr, dma_addr); | |
274 | } | |
275 | ||
276 | #endif /* CONFIG_SBUS */ | |
277 | ||
278 | /* | |
279 | * | |
280 | * ALSA generic memory management | |
281 | * | |
282 | */ | |
283 | ||
284 | ||
285 | /** | |
286 | * snd_dma_alloc_pages - allocate the buffer area according to the given type | |
287 | * @type: the DMA buffer type | |
288 | * @device: the device pointer | |
289 | * @size: the buffer size to allocate | |
290 | * @dmab: buffer allocation record to store the allocated data | |
291 | * | |
292 | * Calls the memory-allocator function for the corresponding | |
293 | * buffer type. | |
294 | * | |
295 | * Returns zero if the buffer with the given size is allocated successfuly, | |
296 | * other a negative value at error. | |
297 | */ | |
298 | int snd_dma_alloc_pages(int type, struct device *device, size_t size, | |
299 | struct snd_dma_buffer *dmab) | |
300 | { | |
301 | snd_assert(size > 0, return -ENXIO); | |
302 | snd_assert(dmab != NULL, return -ENXIO); | |
303 | ||
304 | dmab->dev.type = type; | |
305 | dmab->dev.dev = device; | |
306 | dmab->bytes = 0; | |
307 | switch (type) { | |
308 | case SNDRV_DMA_TYPE_CONTINUOUS: | |
309 | dmab->area = snd_malloc_pages(size, (unsigned long)device); | |
310 | dmab->addr = 0; | |
311 | break; | |
312 | #ifdef CONFIG_SBUS | |
313 | case SNDRV_DMA_TYPE_SBUS: | |
314 | dmab->area = snd_malloc_sbus_pages(device, size, &dmab->addr); | |
315 | break; | |
316 | #endif | |
8f11551b | 317 | #ifdef CONFIG_HAS_DMA |
1da177e4 LT |
318 | case SNDRV_DMA_TYPE_DEV: |
319 | dmab->area = snd_malloc_dev_pages(device, size, &dmab->addr); | |
320 | break; | |
321 | case SNDRV_DMA_TYPE_DEV_SG: | |
322 | snd_malloc_sgbuf_pages(device, size, dmab, NULL); | |
323 | break; | |
8f11551b | 324 | #endif |
1da177e4 LT |
325 | default: |
326 | printk(KERN_ERR "snd-malloc: invalid device type %d\n", type); | |
327 | dmab->area = NULL; | |
328 | dmab->addr = 0; | |
329 | return -ENXIO; | |
330 | } | |
331 | if (! dmab->area) | |
332 | return -ENOMEM; | |
333 | dmab->bytes = size; | |
334 | return 0; | |
335 | } | |
336 | ||
337 | /** | |
338 | * snd_dma_alloc_pages_fallback - allocate the buffer area according to the given type with fallback | |
339 | * @type: the DMA buffer type | |
340 | * @device: the device pointer | |
341 | * @size: the buffer size to allocate | |
342 | * @dmab: buffer allocation record to store the allocated data | |
343 | * | |
344 | * Calls the memory-allocator function for the corresponding | |
345 | * buffer type. When no space is left, this function reduces the size and | |
346 | * tries to allocate again. The size actually allocated is stored in | |
347 | * res_size argument. | |
348 | * | |
349 | * Returns zero if the buffer with the given size is allocated successfuly, | |
350 | * other a negative value at error. | |
351 | */ | |
352 | int snd_dma_alloc_pages_fallback(int type, struct device *device, size_t size, | |
353 | struct snd_dma_buffer *dmab) | |
354 | { | |
355 | int err; | |
356 | ||
357 | snd_assert(size > 0, return -ENXIO); | |
358 | snd_assert(dmab != NULL, return -ENXIO); | |
359 | ||
360 | while ((err = snd_dma_alloc_pages(type, device, size, dmab)) < 0) { | |
361 | if (err != -ENOMEM) | |
362 | return err; | |
363 | size >>= 1; | |
364 | if (size <= PAGE_SIZE) | |
365 | return -ENOMEM; | |
366 | } | |
367 | if (! dmab->area) | |
368 | return -ENOMEM; | |
369 | return 0; | |
370 | } | |
371 | ||
372 | ||
373 | /** | |
374 | * snd_dma_free_pages - release the allocated buffer | |
375 | * @dmab: the buffer allocation record to release | |
376 | * | |
377 | * Releases the allocated buffer via snd_dma_alloc_pages(). | |
378 | */ | |
379 | void snd_dma_free_pages(struct snd_dma_buffer *dmab) | |
380 | { | |
381 | switch (dmab->dev.type) { | |
382 | case SNDRV_DMA_TYPE_CONTINUOUS: | |
383 | snd_free_pages(dmab->area, dmab->bytes); | |
384 | break; | |
385 | #ifdef CONFIG_SBUS | |
386 | case SNDRV_DMA_TYPE_SBUS: | |
387 | snd_free_sbus_pages(dmab->dev.dev, dmab->bytes, dmab->area, dmab->addr); | |
388 | break; | |
389 | #endif | |
8f11551b | 390 | #ifdef CONFIG_HAS_DMA |
1da177e4 LT |
391 | case SNDRV_DMA_TYPE_DEV: |
392 | snd_free_dev_pages(dmab->dev.dev, dmab->bytes, dmab->area, dmab->addr); | |
393 | break; | |
394 | case SNDRV_DMA_TYPE_DEV_SG: | |
395 | snd_free_sgbuf_pages(dmab); | |
396 | break; | |
8f11551b | 397 | #endif |
1da177e4 LT |
398 | default: |
399 | printk(KERN_ERR "snd-malloc: invalid device type %d\n", dmab->dev.type); | |
400 | } | |
401 | } | |
402 | ||
403 | ||
404 | /** | |
405 | * snd_dma_get_reserved - get the reserved buffer for the given device | |
406 | * @dmab: the buffer allocation record to store | |
407 | * @id: the buffer id | |
408 | * | |
409 | * Looks for the reserved-buffer list and re-uses if the same buffer | |
410 | * is found in the list. When the buffer is found, it's removed from the free list. | |
411 | * | |
412 | * Returns the size of buffer if the buffer is found, or zero if not found. | |
413 | */ | |
414 | size_t snd_dma_get_reserved_buf(struct snd_dma_buffer *dmab, unsigned int id) | |
415 | { | |
1da177e4 LT |
416 | struct snd_mem_list *mem; |
417 | ||
418 | snd_assert(dmab, return 0); | |
419 | ||
1a60d4c5 | 420 | mutex_lock(&list_mutex); |
9244b2c3 | 421 | list_for_each_entry(mem, &mem_list_head, list) { |
1da177e4 | 422 | if (mem->id == id && |
b6a96915 TI |
423 | (mem->buffer.dev.dev == NULL || dmab->dev.dev == NULL || |
424 | ! memcmp(&mem->buffer.dev, &dmab->dev, sizeof(dmab->dev)))) { | |
425 | struct device *dev = dmab->dev.dev; | |
9244b2c3 | 426 | list_del(&mem->list); |
1da177e4 | 427 | *dmab = mem->buffer; |
b6a96915 TI |
428 | if (dmab->dev.dev == NULL) |
429 | dmab->dev.dev = dev; | |
1da177e4 | 430 | kfree(mem); |
1a60d4c5 | 431 | mutex_unlock(&list_mutex); |
1da177e4 LT |
432 | return dmab->bytes; |
433 | } | |
434 | } | |
1a60d4c5 | 435 | mutex_unlock(&list_mutex); |
1da177e4 LT |
436 | return 0; |
437 | } | |
438 | ||
439 | /** | |
440 | * snd_dma_reserve_buf - reserve the buffer | |
441 | * @dmab: the buffer to reserve | |
442 | * @id: the buffer id | |
443 | * | |
444 | * Reserves the given buffer as a reserved buffer. | |
445 | * | |
446 | * Returns zero if successful, or a negative code at error. | |
447 | */ | |
448 | int snd_dma_reserve_buf(struct snd_dma_buffer *dmab, unsigned int id) | |
449 | { | |
450 | struct snd_mem_list *mem; | |
451 | ||
452 | snd_assert(dmab, return -EINVAL); | |
453 | mem = kmalloc(sizeof(*mem), GFP_KERNEL); | |
454 | if (! mem) | |
455 | return -ENOMEM; | |
1a60d4c5 | 456 | mutex_lock(&list_mutex); |
1da177e4 LT |
457 | mem->buffer = *dmab; |
458 | mem->id = id; | |
459 | list_add_tail(&mem->list, &mem_list_head); | |
1a60d4c5 | 460 | mutex_unlock(&list_mutex); |
1da177e4 LT |
461 | return 0; |
462 | } | |
463 | ||
464 | /* | |
465 | * purge all reserved buffers | |
466 | */ | |
467 | static void free_all_reserved_pages(void) | |
468 | { | |
469 | struct list_head *p; | |
470 | struct snd_mem_list *mem; | |
471 | ||
1a60d4c5 | 472 | mutex_lock(&list_mutex); |
1da177e4 LT |
473 | while (! list_empty(&mem_list_head)) { |
474 | p = mem_list_head.next; | |
475 | mem = list_entry(p, struct snd_mem_list, list); | |
476 | list_del(p); | |
477 | snd_dma_free_pages(&mem->buffer); | |
478 | kfree(mem); | |
479 | } | |
1a60d4c5 | 480 | mutex_unlock(&list_mutex); |
1da177e4 LT |
481 | } |
482 | ||
483 | ||
1da177e4 LT |
484 | #ifdef CONFIG_PROC_FS |
485 | /* | |
486 | * proc file interface | |
487 | */ | |
b6a96915 | 488 | #define SND_MEM_PROC_FILE "driver/snd-page-alloc" |
a53fc188 | 489 | static struct proc_dir_entry *snd_mem_proc; |
b6a96915 | 490 | |
ccec6e2c | 491 | static int snd_mem_proc_read(struct seq_file *seq, void *offset) |
1da177e4 | 492 | { |
1da177e4 | 493 | long pages = snd_allocated_pages >> (PAGE_SHIFT-12); |
1da177e4 LT |
494 | struct snd_mem_list *mem; |
495 | int devno; | |
496 | static char *types[] = { "UNKNOWN", "CONT", "DEV", "DEV-SG", "SBUS" }; | |
497 | ||
1a60d4c5 | 498 | mutex_lock(&list_mutex); |
ccec6e2c TI |
499 | seq_printf(seq, "pages : %li bytes (%li pages per %likB)\n", |
500 | pages * PAGE_SIZE, pages, PAGE_SIZE / 1024); | |
1da177e4 | 501 | devno = 0; |
9244b2c3 | 502 | list_for_each_entry(mem, &mem_list_head, list) { |
1da177e4 | 503 | devno++; |
ccec6e2c TI |
504 | seq_printf(seq, "buffer %d : ID %08x : type %s\n", |
505 | devno, mem->id, types[mem->buffer.dev.type]); | |
506 | seq_printf(seq, " addr = 0x%lx, size = %d bytes\n", | |
507 | (unsigned long)mem->buffer.addr, | |
508 | (int)mem->buffer.bytes); | |
1da177e4 | 509 | } |
1a60d4c5 | 510 | mutex_unlock(&list_mutex); |
ccec6e2c TI |
511 | return 0; |
512 | } | |
513 | ||
514 | static int snd_mem_proc_open(struct inode *inode, struct file *file) | |
515 | { | |
516 | return single_open(file, snd_mem_proc_read, NULL); | |
1da177e4 | 517 | } |
b6a96915 TI |
518 | |
519 | /* FIXME: for pci only - other bus? */ | |
520 | #ifdef CONFIG_PCI | |
521 | #define gettoken(bufp) strsep(bufp, " \t\n") | |
522 | ||
ccec6e2c TI |
523 | static ssize_t snd_mem_proc_write(struct file *file, const char __user * buffer, |
524 | size_t count, loff_t * ppos) | |
b6a96915 TI |
525 | { |
526 | char buf[128]; | |
527 | char *token, *p; | |
528 | ||
ccec6e2c TI |
529 | if (count > sizeof(buf) - 1) |
530 | return -EINVAL; | |
b6a96915 TI |
531 | if (copy_from_user(buf, buffer, count)) |
532 | return -EFAULT; | |
ccec6e2c | 533 | buf[count] = '\0'; |
b6a96915 TI |
534 | |
535 | p = buf; | |
536 | token = gettoken(&p); | |
537 | if (! token || *token == '#') | |
ccec6e2c | 538 | return count; |
b6a96915 TI |
539 | if (strcmp(token, "add") == 0) { |
540 | char *endp; | |
541 | int vendor, device, size, buffers; | |
542 | long mask; | |
543 | int i, alloced; | |
544 | struct pci_dev *pci; | |
545 | ||
546 | if ((token = gettoken(&p)) == NULL || | |
547 | (vendor = simple_strtol(token, NULL, 0)) <= 0 || | |
548 | (token = gettoken(&p)) == NULL || | |
549 | (device = simple_strtol(token, NULL, 0)) <= 0 || | |
550 | (token = gettoken(&p)) == NULL || | |
551 | (mask = simple_strtol(token, NULL, 0)) < 0 || | |
552 | (token = gettoken(&p)) == NULL || | |
553 | (size = memparse(token, &endp)) < 64*1024 || | |
554 | size > 16*1024*1024 /* too big */ || | |
555 | (token = gettoken(&p)) == NULL || | |
556 | (buffers = simple_strtol(token, NULL, 0)) <= 0 || | |
557 | buffers > 4) { | |
558 | printk(KERN_ERR "snd-page-alloc: invalid proc write format\n"); | |
ccec6e2c | 559 | return count; |
b6a96915 TI |
560 | } |
561 | vendor &= 0xffff; | |
562 | device &= 0xffff; | |
563 | ||
564 | alloced = 0; | |
565 | pci = NULL; | |
0dd119f7 | 566 | while ((pci = pci_get_device(vendor, device, pci)) != NULL) { |
b6a96915 TI |
567 | if (mask > 0 && mask < 0xffffffff) { |
568 | if (pci_set_dma_mask(pci, mask) < 0 || | |
569 | pci_set_consistent_dma_mask(pci, mask) < 0) { | |
570 | printk(KERN_ERR "snd-page-alloc: cannot set DMA mask %lx for pci %04x:%04x\n", mask, vendor, device); | |
df1deb67 | 571 | pci_dev_put(pci); |
ccec6e2c | 572 | return count; |
b6a96915 TI |
573 | } |
574 | } | |
575 | for (i = 0; i < buffers; i++) { | |
576 | struct snd_dma_buffer dmab; | |
577 | memset(&dmab, 0, sizeof(dmab)); | |
578 | if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci), | |
579 | size, &dmab) < 0) { | |
580 | printk(KERN_ERR "snd-page-alloc: cannot allocate buffer pages (size = %d)\n", size); | |
0dd119f7 | 581 | pci_dev_put(pci); |
ccec6e2c | 582 | return count; |
b6a96915 TI |
583 | } |
584 | snd_dma_reserve_buf(&dmab, snd_dma_pci_buf_id(pci)); | |
585 | } | |
586 | alloced++; | |
587 | } | |
588 | if (! alloced) { | |
589 | for (i = 0; i < buffers; i++) { | |
590 | struct snd_dma_buffer dmab; | |
591 | memset(&dmab, 0, sizeof(dmab)); | |
592 | /* FIXME: We can allocate only in ZONE_DMA | |
593 | * without a device pointer! | |
594 | */ | |
595 | if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, NULL, | |
596 | size, &dmab) < 0) { | |
597 | printk(KERN_ERR "snd-page-alloc: cannot allocate buffer pages (size = %d)\n", size); | |
598 | break; | |
599 | } | |
600 | snd_dma_reserve_buf(&dmab, (unsigned int)((vendor << 16) | device)); | |
601 | } | |
602 | } | |
603 | } else if (strcmp(token, "erase") == 0) | |
604 | /* FIXME: need for releasing each buffer chunk? */ | |
605 | free_all_reserved_pages(); | |
606 | else | |
607 | printk(KERN_ERR "snd-page-alloc: invalid proc cmd\n"); | |
ccec6e2c | 608 | return count; |
b6a96915 TI |
609 | } |
610 | #endif /* CONFIG_PCI */ | |
ccec6e2c TI |
611 | |
612 | static const struct file_operations snd_mem_proc_fops = { | |
613 | .owner = THIS_MODULE, | |
614 | .open = snd_mem_proc_open, | |
615 | .read = seq_read, | |
616 | #ifdef CONFIG_PCI | |
617 | .write = snd_mem_proc_write, | |
618 | #endif | |
619 | .llseek = seq_lseek, | |
620 | .release = single_release, | |
621 | }; | |
622 | ||
1da177e4 LT |
623 | #endif /* CONFIG_PROC_FS */ |
624 | ||
625 | /* | |
626 | * module entry | |
627 | */ | |
628 | ||
629 | static int __init snd_mem_init(void) | |
630 | { | |
631 | #ifdef CONFIG_PROC_FS | |
b6a96915 | 632 | snd_mem_proc = create_proc_entry(SND_MEM_PROC_FILE, 0644, NULL); |
ccec6e2c TI |
633 | if (snd_mem_proc) |
634 | snd_mem_proc->proc_fops = &snd_mem_proc_fops; | |
1da177e4 | 635 | #endif |
1da177e4 LT |
636 | return 0; |
637 | } | |
638 | ||
639 | static void __exit snd_mem_exit(void) | |
640 | { | |
e0be4d32 | 641 | remove_proc_entry(SND_MEM_PROC_FILE, NULL); |
1da177e4 LT |
642 | free_all_reserved_pages(); |
643 | if (snd_allocated_pages > 0) | |
644 | printk(KERN_ERR "snd-malloc: Memory leak? pages not freed = %li\n", snd_allocated_pages); | |
645 | } | |
646 | ||
647 | ||
648 | module_init(snd_mem_init) | |
649 | module_exit(snd_mem_exit) | |
650 | ||
651 | ||
652 | /* | |
653 | * exports | |
654 | */ | |
655 | EXPORT_SYMBOL(snd_dma_alloc_pages); | |
656 | EXPORT_SYMBOL(snd_dma_alloc_pages_fallback); | |
657 | EXPORT_SYMBOL(snd_dma_free_pages); | |
658 | ||
659 | EXPORT_SYMBOL(snd_dma_get_reserved_buf); | |
660 | EXPORT_SYMBOL(snd_dma_reserve_buf); | |
661 | ||
662 | EXPORT_SYMBOL(snd_malloc_pages); | |
663 | EXPORT_SYMBOL(snd_free_pages); |