Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 24 | #include <linux/config.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/proc_fs.h> |
| 27 | #include <linux/init.h> |
| 28 | #include <linux/pci.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/mm.h> |
Takashi Iwai | b6a9691 | 2005-05-30 18:27:03 +0200 | [diff] [blame^] | 31 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/dma-mapping.h> |
| 33 | #include <linux/moduleparam.h> |
| 34 | #include <asm/semaphore.h> |
| 35 | #include <sound/memalloc.h> |
| 36 | #ifdef CONFIG_SBUS |
| 37 | #include <asm/sbus.h> |
| 38 | #endif |
| 39 | |
| 40 | |
| 41 | MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>, Jaroslav Kysela <perex@suse.cz>"); |
| 42 | MODULE_DESCRIPTION("Memory allocator for ALSA system."); |
| 43 | MODULE_LICENSE("GPL"); |
| 44 | |
| 45 | |
| 46 | #ifndef SNDRV_CARDS |
| 47 | #define SNDRV_CARDS 8 |
| 48 | #endif |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | /* |
| 51 | */ |
| 52 | |
| 53 | void *snd_malloc_sgbuf_pages(struct device *device, |
| 54 | size_t size, struct snd_dma_buffer *dmab, |
| 55 | size_t *res_size); |
| 56 | int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab); |
| 57 | |
| 58 | /* |
| 59 | */ |
| 60 | |
| 61 | static DECLARE_MUTEX(list_mutex); |
| 62 | static LIST_HEAD(mem_list_head); |
| 63 | |
| 64 | /* buffer preservation list */ |
| 65 | struct snd_mem_list { |
| 66 | struct snd_dma_buffer buffer; |
| 67 | unsigned int id; |
| 68 | struct list_head list; |
| 69 | }; |
| 70 | |
| 71 | /* id for pre-allocated buffers */ |
| 72 | #define SNDRV_DMA_DEVICE_UNUSED (unsigned int)-1 |
| 73 | |
| 74 | #ifdef CONFIG_SND_DEBUG |
| 75 | #define __ASTRING__(x) #x |
| 76 | #define snd_assert(expr, args...) do {\ |
| 77 | if (!(expr)) {\ |
| 78 | printk(KERN_ERR "snd-malloc: BUG? (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\ |
| 79 | args;\ |
| 80 | }\ |
| 81 | } while (0) |
| 82 | #else |
| 83 | #define snd_assert(expr, args...) /**/ |
| 84 | #endif |
| 85 | |
| 86 | /* |
| 87 | * Hacks |
| 88 | */ |
| 89 | |
| 90 | #if defined(__i386__) || defined(__ppc__) || defined(__x86_64__) |
| 91 | /* |
| 92 | * A hack to allocate large buffers via dma_alloc_coherent() |
| 93 | * |
| 94 | * since dma_alloc_coherent always tries GFP_DMA when the requested |
| 95 | * pci memory region is below 32bit, it happens quite often that even |
| 96 | * 2 order of pages cannot be allocated. |
| 97 | * |
| 98 | * so in the following, we allocate at first without dma_mask, so that |
| 99 | * allocation will be done without GFP_DMA. if the area doesn't match |
| 100 | * with the requested region, then realloate with the original dma_mask |
| 101 | * again. |
| 102 | * |
| 103 | * Really, we want to move this type of thing into dma_alloc_coherent() |
| 104 | * so dma_mask doesn't have to be messed with. |
| 105 | */ |
| 106 | |
| 107 | static void *snd_dma_hack_alloc_coherent(struct device *dev, size_t size, |
| 108 | dma_addr_t *dma_handle, int flags) |
| 109 | { |
| 110 | void *ret; |
| 111 | u64 dma_mask, coherent_dma_mask; |
| 112 | |
| 113 | if (dev == NULL || !dev->dma_mask) |
| 114 | return dma_alloc_coherent(dev, size, dma_handle, flags); |
| 115 | dma_mask = *dev->dma_mask; |
| 116 | coherent_dma_mask = dev->coherent_dma_mask; |
| 117 | *dev->dma_mask = 0xffffffff; /* do without masking */ |
| 118 | dev->coherent_dma_mask = 0xffffffff; /* do without masking */ |
| 119 | ret = dma_alloc_coherent(dev, size, dma_handle, flags); |
| 120 | *dev->dma_mask = dma_mask; /* restore */ |
| 121 | dev->coherent_dma_mask = coherent_dma_mask; /* restore */ |
| 122 | if (ret) { |
| 123 | /* obtained address is out of range? */ |
| 124 | if (((unsigned long)*dma_handle + size - 1) & ~dma_mask) { |
| 125 | /* reallocate with the proper mask */ |
| 126 | dma_free_coherent(dev, size, ret, *dma_handle); |
| 127 | ret = dma_alloc_coherent(dev, size, dma_handle, flags); |
| 128 | } |
| 129 | } else { |
| 130 | /* wish to success now with the proper mask... */ |
| 131 | if (dma_mask != 0xffffffffUL) { |
| 132 | /* allocation with GFP_ATOMIC to avoid the long stall */ |
| 133 | flags &= ~GFP_KERNEL; |
| 134 | flags |= GFP_ATOMIC; |
| 135 | ret = dma_alloc_coherent(dev, size, dma_handle, flags); |
| 136 | } |
| 137 | } |
| 138 | return ret; |
| 139 | } |
| 140 | |
| 141 | /* redefine dma_alloc_coherent for some architectures */ |
| 142 | #undef dma_alloc_coherent |
| 143 | #define dma_alloc_coherent snd_dma_hack_alloc_coherent |
| 144 | |
| 145 | #endif /* arch */ |
| 146 | |
| 147 | #if ! defined(__arm__) |
| 148 | #define NEED_RESERVE_PAGES |
| 149 | #endif |
| 150 | |
| 151 | /* |
| 152 | * |
| 153 | * Generic memory allocators |
| 154 | * |
| 155 | */ |
| 156 | |
| 157 | static long snd_allocated_pages; /* holding the number of allocated pages */ |
| 158 | |
| 159 | static inline void inc_snd_pages(int order) |
| 160 | { |
| 161 | snd_allocated_pages += 1 << order; |
| 162 | } |
| 163 | |
| 164 | static inline void dec_snd_pages(int order) |
| 165 | { |
| 166 | snd_allocated_pages -= 1 << order; |
| 167 | } |
| 168 | |
| 169 | static void mark_pages(struct page *page, int order) |
| 170 | { |
| 171 | struct page *last_page = page + (1 << order); |
| 172 | while (page < last_page) |
| 173 | SetPageReserved(page++); |
| 174 | } |
| 175 | |
| 176 | static void unmark_pages(struct page *page, int order) |
| 177 | { |
| 178 | struct page *last_page = page + (1 << order); |
| 179 | while (page < last_page) |
| 180 | ClearPageReserved(page++); |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * snd_malloc_pages - allocate pages with the given size |
| 185 | * @size: the size to allocate in bytes |
| 186 | * @gfp_flags: the allocation conditions, GFP_XXX |
| 187 | * |
| 188 | * Allocates the physically contiguous pages with the given size. |
| 189 | * |
| 190 | * Returns the pointer of the buffer, or NULL if no enoguh memory. |
| 191 | */ |
| 192 | void *snd_malloc_pages(size_t size, unsigned int gfp_flags) |
| 193 | { |
| 194 | int pg; |
| 195 | void *res; |
| 196 | |
| 197 | snd_assert(size > 0, return NULL); |
| 198 | snd_assert(gfp_flags != 0, return NULL); |
| 199 | pg = get_order(size); |
| 200 | if ((res = (void *) __get_free_pages(gfp_flags, pg)) != NULL) { |
| 201 | mark_pages(virt_to_page(res), pg); |
| 202 | inc_snd_pages(pg); |
| 203 | } |
| 204 | return res; |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * snd_free_pages - release the pages |
| 209 | * @ptr: the buffer pointer to release |
| 210 | * @size: the allocated buffer size |
| 211 | * |
| 212 | * Releases the buffer allocated via snd_malloc_pages(). |
| 213 | */ |
| 214 | void snd_free_pages(void *ptr, size_t size) |
| 215 | { |
| 216 | int pg; |
| 217 | |
| 218 | if (ptr == NULL) |
| 219 | return; |
| 220 | pg = get_order(size); |
| 221 | dec_snd_pages(pg); |
| 222 | unmark_pages(virt_to_page(ptr), pg); |
| 223 | free_pages((unsigned long) ptr, pg); |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * |
| 228 | * Bus-specific memory allocators |
| 229 | * |
| 230 | */ |
| 231 | |
| 232 | /* allocate the coherent DMA pages */ |
| 233 | static void *snd_malloc_dev_pages(struct device *dev, size_t size, dma_addr_t *dma) |
| 234 | { |
| 235 | int pg; |
| 236 | void *res; |
| 237 | unsigned int gfp_flags; |
| 238 | |
| 239 | snd_assert(size > 0, return NULL); |
| 240 | snd_assert(dma != NULL, return NULL); |
| 241 | pg = get_order(size); |
| 242 | gfp_flags = GFP_KERNEL |
| 243 | | __GFP_NORETRY /* don't trigger OOM-killer */ |
| 244 | | __GFP_NOWARN; /* no stack trace print - this call is non-critical */ |
| 245 | res = dma_alloc_coherent(dev, PAGE_SIZE << pg, dma, gfp_flags); |
| 246 | if (res != NULL) { |
| 247 | #ifdef NEED_RESERVE_PAGES |
| 248 | mark_pages(virt_to_page(res), pg); /* should be dma_to_page() */ |
| 249 | #endif |
| 250 | inc_snd_pages(pg); |
| 251 | } |
| 252 | |
| 253 | return res; |
| 254 | } |
| 255 | |
| 256 | /* free the coherent DMA pages */ |
| 257 | static void snd_free_dev_pages(struct device *dev, size_t size, void *ptr, |
| 258 | dma_addr_t dma) |
| 259 | { |
| 260 | int pg; |
| 261 | |
| 262 | if (ptr == NULL) |
| 263 | return; |
| 264 | pg = get_order(size); |
| 265 | dec_snd_pages(pg); |
| 266 | #ifdef NEED_RESERVE_PAGES |
| 267 | unmark_pages(virt_to_page(ptr), pg); /* should be dma_to_page() */ |
| 268 | #endif |
| 269 | dma_free_coherent(dev, PAGE_SIZE << pg, ptr, dma); |
| 270 | } |
| 271 | |
| 272 | #ifdef CONFIG_SBUS |
| 273 | |
| 274 | static void *snd_malloc_sbus_pages(struct device *dev, size_t size, |
| 275 | dma_addr_t *dma_addr) |
| 276 | { |
| 277 | struct sbus_dev *sdev = (struct sbus_dev *)dev; |
| 278 | int pg; |
| 279 | void *res; |
| 280 | |
| 281 | snd_assert(size > 0, return NULL); |
| 282 | snd_assert(dma_addr != NULL, return NULL); |
| 283 | pg = get_order(size); |
| 284 | res = sbus_alloc_consistent(sdev, PAGE_SIZE * (1 << pg), dma_addr); |
| 285 | if (res != NULL) |
| 286 | inc_snd_pages(pg); |
| 287 | return res; |
| 288 | } |
| 289 | |
| 290 | static void snd_free_sbus_pages(struct device *dev, size_t size, |
| 291 | void *ptr, dma_addr_t dma_addr) |
| 292 | { |
| 293 | struct sbus_dev *sdev = (struct sbus_dev *)dev; |
| 294 | int pg; |
| 295 | |
| 296 | if (ptr == NULL) |
| 297 | return; |
| 298 | pg = get_order(size); |
| 299 | dec_snd_pages(pg); |
| 300 | sbus_free_consistent(sdev, PAGE_SIZE * (1 << pg), ptr, dma_addr); |
| 301 | } |
| 302 | |
| 303 | #endif /* CONFIG_SBUS */ |
| 304 | |
| 305 | /* |
| 306 | * |
| 307 | * ALSA generic memory management |
| 308 | * |
| 309 | */ |
| 310 | |
| 311 | |
| 312 | /** |
| 313 | * snd_dma_alloc_pages - allocate the buffer area according to the given type |
| 314 | * @type: the DMA buffer type |
| 315 | * @device: the device pointer |
| 316 | * @size: the buffer size to allocate |
| 317 | * @dmab: buffer allocation record to store the allocated data |
| 318 | * |
| 319 | * Calls the memory-allocator function for the corresponding |
| 320 | * buffer type. |
| 321 | * |
| 322 | * Returns zero if the buffer with the given size is allocated successfuly, |
| 323 | * other a negative value at error. |
| 324 | */ |
| 325 | int snd_dma_alloc_pages(int type, struct device *device, size_t size, |
| 326 | struct snd_dma_buffer *dmab) |
| 327 | { |
| 328 | snd_assert(size > 0, return -ENXIO); |
| 329 | snd_assert(dmab != NULL, return -ENXIO); |
| 330 | |
| 331 | dmab->dev.type = type; |
| 332 | dmab->dev.dev = device; |
| 333 | dmab->bytes = 0; |
| 334 | switch (type) { |
| 335 | case SNDRV_DMA_TYPE_CONTINUOUS: |
| 336 | dmab->area = snd_malloc_pages(size, (unsigned long)device); |
| 337 | dmab->addr = 0; |
| 338 | break; |
| 339 | #ifdef CONFIG_SBUS |
| 340 | case SNDRV_DMA_TYPE_SBUS: |
| 341 | dmab->area = snd_malloc_sbus_pages(device, size, &dmab->addr); |
| 342 | break; |
| 343 | #endif |
| 344 | case SNDRV_DMA_TYPE_DEV: |
| 345 | dmab->area = snd_malloc_dev_pages(device, size, &dmab->addr); |
| 346 | break; |
| 347 | case SNDRV_DMA_TYPE_DEV_SG: |
| 348 | snd_malloc_sgbuf_pages(device, size, dmab, NULL); |
| 349 | break; |
| 350 | default: |
| 351 | printk(KERN_ERR "snd-malloc: invalid device type %d\n", type); |
| 352 | dmab->area = NULL; |
| 353 | dmab->addr = 0; |
| 354 | return -ENXIO; |
| 355 | } |
| 356 | if (! dmab->area) |
| 357 | return -ENOMEM; |
| 358 | dmab->bytes = size; |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | /** |
| 363 | * snd_dma_alloc_pages_fallback - allocate the buffer area according to the given type with fallback |
| 364 | * @type: the DMA buffer type |
| 365 | * @device: the device pointer |
| 366 | * @size: the buffer size to allocate |
| 367 | * @dmab: buffer allocation record to store the allocated data |
| 368 | * |
| 369 | * Calls the memory-allocator function for the corresponding |
| 370 | * buffer type. When no space is left, this function reduces the size and |
| 371 | * tries to allocate again. The size actually allocated is stored in |
| 372 | * res_size argument. |
| 373 | * |
| 374 | * Returns zero if the buffer with the given size is allocated successfuly, |
| 375 | * other a negative value at error. |
| 376 | */ |
| 377 | int snd_dma_alloc_pages_fallback(int type, struct device *device, size_t size, |
| 378 | struct snd_dma_buffer *dmab) |
| 379 | { |
| 380 | int err; |
| 381 | |
| 382 | snd_assert(size > 0, return -ENXIO); |
| 383 | snd_assert(dmab != NULL, return -ENXIO); |
| 384 | |
| 385 | while ((err = snd_dma_alloc_pages(type, device, size, dmab)) < 0) { |
| 386 | if (err != -ENOMEM) |
| 387 | return err; |
| 388 | size >>= 1; |
| 389 | if (size <= PAGE_SIZE) |
| 390 | return -ENOMEM; |
| 391 | } |
| 392 | if (! dmab->area) |
| 393 | return -ENOMEM; |
| 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | |
| 398 | /** |
| 399 | * snd_dma_free_pages - release the allocated buffer |
| 400 | * @dmab: the buffer allocation record to release |
| 401 | * |
| 402 | * Releases the allocated buffer via snd_dma_alloc_pages(). |
| 403 | */ |
| 404 | void snd_dma_free_pages(struct snd_dma_buffer *dmab) |
| 405 | { |
| 406 | switch (dmab->dev.type) { |
| 407 | case SNDRV_DMA_TYPE_CONTINUOUS: |
| 408 | snd_free_pages(dmab->area, dmab->bytes); |
| 409 | break; |
| 410 | #ifdef CONFIG_SBUS |
| 411 | case SNDRV_DMA_TYPE_SBUS: |
| 412 | snd_free_sbus_pages(dmab->dev.dev, dmab->bytes, dmab->area, dmab->addr); |
| 413 | break; |
| 414 | #endif |
| 415 | case SNDRV_DMA_TYPE_DEV: |
| 416 | snd_free_dev_pages(dmab->dev.dev, dmab->bytes, dmab->area, dmab->addr); |
| 417 | break; |
| 418 | case SNDRV_DMA_TYPE_DEV_SG: |
| 419 | snd_free_sgbuf_pages(dmab); |
| 420 | break; |
| 421 | default: |
| 422 | printk(KERN_ERR "snd-malloc: invalid device type %d\n", dmab->dev.type); |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | |
| 427 | /** |
| 428 | * snd_dma_get_reserved - get the reserved buffer for the given device |
| 429 | * @dmab: the buffer allocation record to store |
| 430 | * @id: the buffer id |
| 431 | * |
| 432 | * Looks for the reserved-buffer list and re-uses if the same buffer |
| 433 | * is found in the list. When the buffer is found, it's removed from the free list. |
| 434 | * |
| 435 | * Returns the size of buffer if the buffer is found, or zero if not found. |
| 436 | */ |
| 437 | size_t snd_dma_get_reserved_buf(struct snd_dma_buffer *dmab, unsigned int id) |
| 438 | { |
| 439 | struct list_head *p; |
| 440 | struct snd_mem_list *mem; |
| 441 | |
| 442 | snd_assert(dmab, return 0); |
| 443 | |
| 444 | down(&list_mutex); |
| 445 | list_for_each(p, &mem_list_head) { |
| 446 | mem = list_entry(p, struct snd_mem_list, list); |
| 447 | if (mem->id == id && |
Takashi Iwai | b6a9691 | 2005-05-30 18:27:03 +0200 | [diff] [blame^] | 448 | (mem->buffer.dev.dev == NULL || dmab->dev.dev == NULL || |
| 449 | ! memcmp(&mem->buffer.dev, &dmab->dev, sizeof(dmab->dev)))) { |
| 450 | struct device *dev = dmab->dev.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | list_del(p); |
| 452 | *dmab = mem->buffer; |
Takashi Iwai | b6a9691 | 2005-05-30 18:27:03 +0200 | [diff] [blame^] | 453 | if (dmab->dev.dev == NULL) |
| 454 | dmab->dev.dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | kfree(mem); |
| 456 | up(&list_mutex); |
| 457 | return dmab->bytes; |
| 458 | } |
| 459 | } |
| 460 | up(&list_mutex); |
| 461 | return 0; |
| 462 | } |
| 463 | |
| 464 | /** |
| 465 | * snd_dma_reserve_buf - reserve the buffer |
| 466 | * @dmab: the buffer to reserve |
| 467 | * @id: the buffer id |
| 468 | * |
| 469 | * Reserves the given buffer as a reserved buffer. |
| 470 | * |
| 471 | * Returns zero if successful, or a negative code at error. |
| 472 | */ |
| 473 | int snd_dma_reserve_buf(struct snd_dma_buffer *dmab, unsigned int id) |
| 474 | { |
| 475 | struct snd_mem_list *mem; |
| 476 | |
| 477 | snd_assert(dmab, return -EINVAL); |
| 478 | mem = kmalloc(sizeof(*mem), GFP_KERNEL); |
| 479 | if (! mem) |
| 480 | return -ENOMEM; |
| 481 | down(&list_mutex); |
| 482 | mem->buffer = *dmab; |
| 483 | mem->id = id; |
| 484 | list_add_tail(&mem->list, &mem_list_head); |
| 485 | up(&list_mutex); |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | /* |
| 490 | * purge all reserved buffers |
| 491 | */ |
| 492 | static void free_all_reserved_pages(void) |
| 493 | { |
| 494 | struct list_head *p; |
| 495 | struct snd_mem_list *mem; |
| 496 | |
| 497 | down(&list_mutex); |
| 498 | while (! list_empty(&mem_list_head)) { |
| 499 | p = mem_list_head.next; |
| 500 | mem = list_entry(p, struct snd_mem_list, list); |
| 501 | list_del(p); |
| 502 | snd_dma_free_pages(&mem->buffer); |
| 503 | kfree(mem); |
| 504 | } |
| 505 | up(&list_mutex); |
| 506 | } |
| 507 | |
| 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | #ifdef CONFIG_PROC_FS |
| 510 | /* |
| 511 | * proc file interface |
| 512 | */ |
Takashi Iwai | b6a9691 | 2005-05-30 18:27:03 +0200 | [diff] [blame^] | 513 | #define SND_MEM_PROC_FILE "driver/snd-page-alloc" |
| 514 | struct proc_dir_entry *snd_mem_proc; |
| 515 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | static int snd_mem_proc_read(char *page, char **start, off_t off, |
| 517 | int count, int *eof, void *data) |
| 518 | { |
| 519 | int len = 0; |
| 520 | long pages = snd_allocated_pages >> (PAGE_SHIFT-12); |
| 521 | struct list_head *p; |
| 522 | struct snd_mem_list *mem; |
| 523 | int devno; |
| 524 | static char *types[] = { "UNKNOWN", "CONT", "DEV", "DEV-SG", "SBUS" }; |
| 525 | |
| 526 | down(&list_mutex); |
| 527 | len += snprintf(page + len, count - len, |
| 528 | "pages : %li bytes (%li pages per %likB)\n", |
| 529 | pages * PAGE_SIZE, pages, PAGE_SIZE / 1024); |
| 530 | devno = 0; |
| 531 | list_for_each(p, &mem_list_head) { |
| 532 | mem = list_entry(p, struct snd_mem_list, list); |
| 533 | devno++; |
| 534 | len += snprintf(page + len, count - len, |
| 535 | "buffer %d : ID %08x : type %s\n", |
| 536 | devno, mem->id, types[mem->buffer.dev.type]); |
| 537 | len += snprintf(page + len, count - len, |
| 538 | " addr = 0x%lx, size = %d bytes\n", |
| 539 | (unsigned long)mem->buffer.addr, (int)mem->buffer.bytes); |
| 540 | } |
| 541 | up(&list_mutex); |
| 542 | return len; |
| 543 | } |
Takashi Iwai | b6a9691 | 2005-05-30 18:27:03 +0200 | [diff] [blame^] | 544 | |
| 545 | /* FIXME: for pci only - other bus? */ |
| 546 | #ifdef CONFIG_PCI |
| 547 | #define gettoken(bufp) strsep(bufp, " \t\n") |
| 548 | |
| 549 | static int snd_mem_proc_write(struct file *file, const char __user *buffer, |
| 550 | unsigned long count, void *data) |
| 551 | { |
| 552 | char buf[128]; |
| 553 | char *token, *p; |
| 554 | |
| 555 | if (count > ARRAY_SIZE(buf) - 1) |
| 556 | count = ARRAY_SIZE(buf) - 1; |
| 557 | if (copy_from_user(buf, buffer, count)) |
| 558 | return -EFAULT; |
| 559 | buf[ARRAY_SIZE(buf) - 1] = '\0'; |
| 560 | |
| 561 | p = buf; |
| 562 | token = gettoken(&p); |
| 563 | if (! token || *token == '#') |
| 564 | return (int)count; |
| 565 | if (strcmp(token, "add") == 0) { |
| 566 | char *endp; |
| 567 | int vendor, device, size, buffers; |
| 568 | long mask; |
| 569 | int i, alloced; |
| 570 | struct pci_dev *pci; |
| 571 | |
| 572 | if ((token = gettoken(&p)) == NULL || |
| 573 | (vendor = simple_strtol(token, NULL, 0)) <= 0 || |
| 574 | (token = gettoken(&p)) == NULL || |
| 575 | (device = simple_strtol(token, NULL, 0)) <= 0 || |
| 576 | (token = gettoken(&p)) == NULL || |
| 577 | (mask = simple_strtol(token, NULL, 0)) < 0 || |
| 578 | (token = gettoken(&p)) == NULL || |
| 579 | (size = memparse(token, &endp)) < 64*1024 || |
| 580 | size > 16*1024*1024 /* too big */ || |
| 581 | (token = gettoken(&p)) == NULL || |
| 582 | (buffers = simple_strtol(token, NULL, 0)) <= 0 || |
| 583 | buffers > 4) { |
| 584 | printk(KERN_ERR "snd-page-alloc: invalid proc write format\n"); |
| 585 | return (int)count; |
| 586 | } |
| 587 | vendor &= 0xffff; |
| 588 | device &= 0xffff; |
| 589 | |
| 590 | alloced = 0; |
| 591 | pci = NULL; |
| 592 | while ((pci = pci_find_device(vendor, device, pci)) != NULL) { |
| 593 | if (mask > 0 && mask < 0xffffffff) { |
| 594 | if (pci_set_dma_mask(pci, mask) < 0 || |
| 595 | pci_set_consistent_dma_mask(pci, mask) < 0) { |
| 596 | printk(KERN_ERR "snd-page-alloc: cannot set DMA mask %lx for pci %04x:%04x\n", mask, vendor, device); |
| 597 | return (int)count; |
| 598 | } |
| 599 | } |
| 600 | for (i = 0; i < buffers; i++) { |
| 601 | struct snd_dma_buffer dmab; |
| 602 | memset(&dmab, 0, sizeof(dmab)); |
| 603 | if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci), |
| 604 | size, &dmab) < 0) { |
| 605 | printk(KERN_ERR "snd-page-alloc: cannot allocate buffer pages (size = %d)\n", size); |
| 606 | return (int)count; |
| 607 | } |
| 608 | snd_dma_reserve_buf(&dmab, snd_dma_pci_buf_id(pci)); |
| 609 | } |
| 610 | alloced++; |
| 611 | } |
| 612 | if (! alloced) { |
| 613 | for (i = 0; i < buffers; i++) { |
| 614 | struct snd_dma_buffer dmab; |
| 615 | memset(&dmab, 0, sizeof(dmab)); |
| 616 | /* FIXME: We can allocate only in ZONE_DMA |
| 617 | * without a device pointer! |
| 618 | */ |
| 619 | if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, NULL, |
| 620 | size, &dmab) < 0) { |
| 621 | printk(KERN_ERR "snd-page-alloc: cannot allocate buffer pages (size = %d)\n", size); |
| 622 | break; |
| 623 | } |
| 624 | snd_dma_reserve_buf(&dmab, (unsigned int)((vendor << 16) | device)); |
| 625 | } |
| 626 | } |
| 627 | } else if (strcmp(token, "erase") == 0) |
| 628 | /* FIXME: need for releasing each buffer chunk? */ |
| 629 | free_all_reserved_pages(); |
| 630 | else |
| 631 | printk(KERN_ERR "snd-page-alloc: invalid proc cmd\n"); |
| 632 | return (int)count; |
| 633 | } |
| 634 | #endif /* CONFIG_PCI */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | #endif /* CONFIG_PROC_FS */ |
| 636 | |
| 637 | /* |
| 638 | * module entry |
| 639 | */ |
| 640 | |
| 641 | static int __init snd_mem_init(void) |
| 642 | { |
| 643 | #ifdef CONFIG_PROC_FS |
Takashi Iwai | b6a9691 | 2005-05-30 18:27:03 +0200 | [diff] [blame^] | 644 | snd_mem_proc = create_proc_entry(SND_MEM_PROC_FILE, 0644, NULL); |
| 645 | if (snd_mem_proc) { |
| 646 | snd_mem_proc->read_proc = snd_mem_proc_read; |
| 647 | #ifdef CONFIG_PCI |
| 648 | snd_mem_proc->write_proc = snd_mem_proc_write; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | #endif |
Takashi Iwai | b6a9691 | 2005-05-30 18:27:03 +0200 | [diff] [blame^] | 650 | } |
| 651 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | return 0; |
| 653 | } |
| 654 | |
| 655 | static void __exit snd_mem_exit(void) |
| 656 | { |
Takashi Iwai | b6a9691 | 2005-05-30 18:27:03 +0200 | [diff] [blame^] | 657 | if (snd_mem_proc) |
| 658 | remove_proc_entry(SND_MEM_PROC_FILE, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | free_all_reserved_pages(); |
| 660 | if (snd_allocated_pages > 0) |
| 661 | printk(KERN_ERR "snd-malloc: Memory leak? pages not freed = %li\n", snd_allocated_pages); |
| 662 | } |
| 663 | |
| 664 | |
| 665 | module_init(snd_mem_init) |
| 666 | module_exit(snd_mem_exit) |
| 667 | |
| 668 | |
| 669 | /* |
| 670 | * exports |
| 671 | */ |
| 672 | EXPORT_SYMBOL(snd_dma_alloc_pages); |
| 673 | EXPORT_SYMBOL(snd_dma_alloc_pages_fallback); |
| 674 | EXPORT_SYMBOL(snd_dma_free_pages); |
| 675 | |
| 676 | EXPORT_SYMBOL(snd_dma_get_reserved_buf); |
| 677 | EXPORT_SYMBOL(snd_dma_reserve_buf); |
| 678 | |
| 679 | EXPORT_SYMBOL(snd_malloc_pages); |
| 680 | EXPORT_SYMBOL(snd_free_pages); |