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ba4e7d97 TH |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | ||
25d0479a JP |
28 | #define pr_fmt(fmt) "[TTM] " fmt |
29 | ||
760285e7 DH |
30 | #include <drm/ttm/ttm_memory.h> |
31 | #include <drm/ttm/ttm_module.h> | |
32 | #include <drm/ttm/ttm_page_alloc.h> | |
ba4e7d97 TH |
33 | #include <linux/spinlock.h> |
34 | #include <linux/sched.h> | |
35 | #include <linux/wait.h> | |
36 | #include <linux/mm.h> | |
37 | #include <linux/module.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
ba4e7d97 | 39 | |
ba4e7d97 TH |
40 | #define TTM_MEMORY_ALLOC_RETRIES 4 |
41 | ||
5fd9cbad TH |
42 | struct ttm_mem_zone { |
43 | struct kobject kobj; | |
44 | struct ttm_mem_global *glob; | |
45 | const char *name; | |
46 | uint64_t zone_mem; | |
47 | uint64_t emer_mem; | |
48 | uint64_t max_mem; | |
49 | uint64_t swap_limit; | |
50 | uint64_t used_mem; | |
51 | }; | |
52 | ||
53 | static struct attribute ttm_mem_sys = { | |
54 | .name = "zone_memory", | |
55 | .mode = S_IRUGO | |
56 | }; | |
57 | static struct attribute ttm_mem_emer = { | |
58 | .name = "emergency_memory", | |
59 | .mode = S_IRUGO | S_IWUSR | |
60 | }; | |
61 | static struct attribute ttm_mem_max = { | |
62 | .name = "available_memory", | |
63 | .mode = S_IRUGO | S_IWUSR | |
64 | }; | |
65 | static struct attribute ttm_mem_swap = { | |
66 | .name = "swap_limit", | |
67 | .mode = S_IRUGO | S_IWUSR | |
68 | }; | |
69 | static struct attribute ttm_mem_used = { | |
70 | .name = "used_memory", | |
71 | .mode = S_IRUGO | |
72 | }; | |
73 | ||
74 | static void ttm_mem_zone_kobj_release(struct kobject *kobj) | |
75 | { | |
76 | struct ttm_mem_zone *zone = | |
77 | container_of(kobj, struct ttm_mem_zone, kobj); | |
78 | ||
25d0479a JP |
79 | pr_info("Zone %7s: Used memory at exit: %llu kiB\n", |
80 | zone->name, (unsigned long long)zone->used_mem >> 10); | |
5fd9cbad TH |
81 | kfree(zone); |
82 | } | |
83 | ||
84 | static ssize_t ttm_mem_zone_show(struct kobject *kobj, | |
85 | struct attribute *attr, | |
86 | char *buffer) | |
87 | { | |
88 | struct ttm_mem_zone *zone = | |
89 | container_of(kobj, struct ttm_mem_zone, kobj); | |
90 | uint64_t val = 0; | |
91 | ||
92 | spin_lock(&zone->glob->lock); | |
93 | if (attr == &ttm_mem_sys) | |
94 | val = zone->zone_mem; | |
95 | else if (attr == &ttm_mem_emer) | |
96 | val = zone->emer_mem; | |
97 | else if (attr == &ttm_mem_max) | |
98 | val = zone->max_mem; | |
99 | else if (attr == &ttm_mem_swap) | |
100 | val = zone->swap_limit; | |
101 | else if (attr == &ttm_mem_used) | |
102 | val = zone->used_mem; | |
103 | spin_unlock(&zone->glob->lock); | |
104 | ||
105 | return snprintf(buffer, PAGE_SIZE, "%llu\n", | |
106 | (unsigned long long) val >> 10); | |
107 | } | |
108 | ||
109 | static void ttm_check_swapping(struct ttm_mem_global *glob); | |
110 | ||
111 | static ssize_t ttm_mem_zone_store(struct kobject *kobj, | |
112 | struct attribute *attr, | |
113 | const char *buffer, | |
114 | size_t size) | |
115 | { | |
116 | struct ttm_mem_zone *zone = | |
117 | container_of(kobj, struct ttm_mem_zone, kobj); | |
118 | int chars; | |
119 | unsigned long val; | |
120 | uint64_t val64; | |
121 | ||
122 | chars = sscanf(buffer, "%lu", &val); | |
123 | if (chars == 0) | |
124 | return size; | |
125 | ||
126 | val64 = val; | |
127 | val64 <<= 10; | |
128 | ||
129 | spin_lock(&zone->glob->lock); | |
130 | if (val64 > zone->zone_mem) | |
131 | val64 = zone->zone_mem; | |
132 | if (attr == &ttm_mem_emer) { | |
133 | zone->emer_mem = val64; | |
134 | if (zone->max_mem > val64) | |
135 | zone->max_mem = val64; | |
136 | } else if (attr == &ttm_mem_max) { | |
137 | zone->max_mem = val64; | |
138 | if (zone->emer_mem < val64) | |
139 | zone->emer_mem = val64; | |
140 | } else if (attr == &ttm_mem_swap) | |
141 | zone->swap_limit = val64; | |
142 | spin_unlock(&zone->glob->lock); | |
143 | ||
144 | ttm_check_swapping(zone->glob); | |
145 | ||
146 | return size; | |
147 | } | |
148 | ||
149 | static struct attribute *ttm_mem_zone_attrs[] = { | |
150 | &ttm_mem_sys, | |
151 | &ttm_mem_emer, | |
152 | &ttm_mem_max, | |
153 | &ttm_mem_swap, | |
154 | &ttm_mem_used, | |
155 | NULL | |
156 | }; | |
157 | ||
52cf25d0 | 158 | static const struct sysfs_ops ttm_mem_zone_ops = { |
5fd9cbad TH |
159 | .show = &ttm_mem_zone_show, |
160 | .store = &ttm_mem_zone_store | |
161 | }; | |
162 | ||
163 | static struct kobj_type ttm_mem_zone_kobj_type = { | |
164 | .release = &ttm_mem_zone_kobj_release, | |
165 | .sysfs_ops = &ttm_mem_zone_ops, | |
166 | .default_attrs = ttm_mem_zone_attrs, | |
167 | }; | |
168 | ||
169 | static void ttm_mem_global_kobj_release(struct kobject *kobj) | |
170 | { | |
171 | struct ttm_mem_global *glob = | |
172 | container_of(kobj, struct ttm_mem_global, kobj); | |
173 | ||
174 | kfree(glob); | |
175 | } | |
176 | ||
177 | static struct kobj_type ttm_mem_glob_kobj_type = { | |
178 | .release = &ttm_mem_global_kobj_release, | |
179 | }; | |
180 | ||
181 | static bool ttm_zones_above_swap_target(struct ttm_mem_global *glob, | |
182 | bool from_wq, uint64_t extra) | |
183 | { | |
184 | unsigned int i; | |
185 | struct ttm_mem_zone *zone; | |
186 | uint64_t target; | |
187 | ||
188 | for (i = 0; i < glob->num_zones; ++i) { | |
189 | zone = glob->zones[i]; | |
190 | ||
191 | if (from_wq) | |
192 | target = zone->swap_limit; | |
193 | else if (capable(CAP_SYS_ADMIN)) | |
194 | target = zone->emer_mem; | |
195 | else | |
196 | target = zone->max_mem; | |
197 | ||
198 | target = (extra > target) ? 0ULL : target; | |
199 | ||
200 | if (zone->used_mem > target) | |
201 | return true; | |
202 | } | |
203 | return false; | |
204 | } | |
205 | ||
ba4e7d97 TH |
206 | /** |
207 | * At this point we only support a single shrink callback. | |
208 | * Extend this if needed, perhaps using a linked list of callbacks. | |
209 | * Note that this function is reentrant: | |
210 | * many threads may try to swap out at any given time. | |
211 | */ | |
212 | ||
5fd9cbad | 213 | static void ttm_shrink(struct ttm_mem_global *glob, bool from_wq, |
ba4e7d97 TH |
214 | uint64_t extra) |
215 | { | |
216 | int ret; | |
217 | struct ttm_mem_shrink *shrink; | |
ba4e7d97 TH |
218 | |
219 | spin_lock(&glob->lock); | |
220 | if (glob->shrink == NULL) | |
221 | goto out; | |
222 | ||
5fd9cbad | 223 | while (ttm_zones_above_swap_target(glob, from_wq, extra)) { |
ba4e7d97 TH |
224 | shrink = glob->shrink; |
225 | spin_unlock(&glob->lock); | |
226 | ret = shrink->do_shrink(shrink); | |
227 | spin_lock(&glob->lock); | |
228 | if (unlikely(ret != 0)) | |
229 | goto out; | |
230 | } | |
231 | out: | |
232 | spin_unlock(&glob->lock); | |
233 | } | |
234 | ||
5fd9cbad TH |
235 | |
236 | ||
ba4e7d97 TH |
237 | static void ttm_shrink_work(struct work_struct *work) |
238 | { | |
239 | struct ttm_mem_global *glob = | |
240 | container_of(work, struct ttm_mem_global, work); | |
241 | ||
242 | ttm_shrink(glob, true, 0ULL); | |
243 | } | |
244 | ||
5fd9cbad TH |
245 | static int ttm_mem_init_kernel_zone(struct ttm_mem_global *glob, |
246 | const struct sysinfo *si) | |
247 | { | |
248 | struct ttm_mem_zone *zone = kzalloc(sizeof(*zone), GFP_KERNEL); | |
249 | uint64_t mem; | |
759e4f83 | 250 | int ret; |
5fd9cbad TH |
251 | |
252 | if (unlikely(!zone)) | |
253 | return -ENOMEM; | |
254 | ||
255 | mem = si->totalram - si->totalhigh; | |
256 | mem *= si->mem_unit; | |
257 | ||
258 | zone->name = "kernel"; | |
259 | zone->zone_mem = mem; | |
260 | zone->max_mem = mem >> 1; | |
261 | zone->emer_mem = (mem >> 1) + (mem >> 2); | |
262 | zone->swap_limit = zone->max_mem - (mem >> 3); | |
263 | zone->used_mem = 0; | |
264 | zone->glob = glob; | |
265 | glob->zone_kernel = zone; | |
b642ed06 RD |
266 | ret = kobject_init_and_add( |
267 | &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name); | |
759e4f83 TH |
268 | if (unlikely(ret != 0)) { |
269 | kobject_put(&zone->kobj); | |
270 | return ret; | |
271 | } | |
272 | glob->zones[glob->num_zones++] = zone; | |
273 | return 0; | |
5fd9cbad TH |
274 | } |
275 | ||
276 | #ifdef CONFIG_HIGHMEM | |
277 | static int ttm_mem_init_highmem_zone(struct ttm_mem_global *glob, | |
278 | const struct sysinfo *si) | |
279 | { | |
46a79fa0 | 280 | struct ttm_mem_zone *zone; |
5fd9cbad | 281 | uint64_t mem; |
759e4f83 | 282 | int ret; |
5fd9cbad | 283 | |
5fd9cbad TH |
284 | if (si->totalhigh == 0) |
285 | return 0; | |
286 | ||
46a79fa0 DC |
287 | zone = kzalloc(sizeof(*zone), GFP_KERNEL); |
288 | if (unlikely(!zone)) | |
289 | return -ENOMEM; | |
290 | ||
5fd9cbad TH |
291 | mem = si->totalram; |
292 | mem *= si->mem_unit; | |
293 | ||
294 | zone->name = "highmem"; | |
295 | zone->zone_mem = mem; | |
296 | zone->max_mem = mem >> 1; | |
297 | zone->emer_mem = (mem >> 1) + (mem >> 2); | |
298 | zone->swap_limit = zone->max_mem - (mem >> 3); | |
299 | zone->used_mem = 0; | |
300 | zone->glob = glob; | |
301 | glob->zone_highmem = zone; | |
b642ed06 RD |
302 | ret = kobject_init_and_add( |
303 | &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name); | |
759e4f83 TH |
304 | if (unlikely(ret != 0)) { |
305 | kobject_put(&zone->kobj); | |
306 | return ret; | |
307 | } | |
308 | glob->zones[glob->num_zones++] = zone; | |
309 | return 0; | |
5fd9cbad TH |
310 | } |
311 | #else | |
312 | static int ttm_mem_init_dma32_zone(struct ttm_mem_global *glob, | |
313 | const struct sysinfo *si) | |
314 | { | |
315 | struct ttm_mem_zone *zone = kzalloc(sizeof(*zone), GFP_KERNEL); | |
316 | uint64_t mem; | |
759e4f83 | 317 | int ret; |
5fd9cbad TH |
318 | |
319 | if (unlikely(!zone)) | |
320 | return -ENOMEM; | |
321 | ||
322 | mem = si->totalram; | |
323 | mem *= si->mem_unit; | |
324 | ||
325 | /** | |
326 | * No special dma32 zone needed. | |
327 | */ | |
328 | ||
ec42a6e7 DA |
329 | if (mem <= ((uint64_t) 1ULL << 32)) { |
330 | kfree(zone); | |
5fd9cbad | 331 | return 0; |
ec42a6e7 | 332 | } |
5fd9cbad TH |
333 | |
334 | /* | |
335 | * Limit max dma32 memory to 4GB for now | |
336 | * until we can figure out how big this | |
337 | * zone really is. | |
338 | */ | |
339 | ||
340 | mem = ((uint64_t) 1ULL << 32); | |
341 | zone->name = "dma32"; | |
342 | zone->zone_mem = mem; | |
343 | zone->max_mem = mem >> 1; | |
344 | zone->emer_mem = (mem >> 1) + (mem >> 2); | |
345 | zone->swap_limit = zone->max_mem - (mem >> 3); | |
346 | zone->used_mem = 0; | |
347 | zone->glob = glob; | |
348 | glob->zone_dma32 = zone; | |
b642ed06 RD |
349 | ret = kobject_init_and_add( |
350 | &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name); | |
759e4f83 TH |
351 | if (unlikely(ret != 0)) { |
352 | kobject_put(&zone->kobj); | |
353 | return ret; | |
354 | } | |
355 | glob->zones[glob->num_zones++] = zone; | |
356 | return 0; | |
5fd9cbad TH |
357 | } |
358 | #endif | |
359 | ||
ba4e7d97 TH |
360 | int ttm_mem_global_init(struct ttm_mem_global *glob) |
361 | { | |
362 | struct sysinfo si; | |
5fd9cbad TH |
363 | int ret; |
364 | int i; | |
365 | struct ttm_mem_zone *zone; | |
ba4e7d97 TH |
366 | |
367 | spin_lock_init(&glob->lock); | |
368 | glob->swap_queue = create_singlethread_workqueue("ttm_swap"); | |
369 | INIT_WORK(&glob->work, ttm_shrink_work); | |
b642ed06 RD |
370 | ret = kobject_init_and_add( |
371 | &glob->kobj, &ttm_mem_glob_kobj_type, ttm_get_kobj(), "memory_accounting"); | |
759e4f83 TH |
372 | if (unlikely(ret != 0)) { |
373 | kobject_put(&glob->kobj); | |
374 | return ret; | |
375 | } | |
ba4e7d97 TH |
376 | |
377 | si_meminfo(&si); | |
378 | ||
5fd9cbad TH |
379 | ret = ttm_mem_init_kernel_zone(glob, &si); |
380 | if (unlikely(ret != 0)) | |
381 | goto out_no_zone; | |
382 | #ifdef CONFIG_HIGHMEM | |
383 | ret = ttm_mem_init_highmem_zone(glob, &si); | |
384 | if (unlikely(ret != 0)) | |
385 | goto out_no_zone; | |
386 | #else | |
387 | ret = ttm_mem_init_dma32_zone(glob, &si); | |
388 | if (unlikely(ret != 0)) | |
389 | goto out_no_zone; | |
390 | #endif | |
391 | for (i = 0; i < glob->num_zones; ++i) { | |
392 | zone = glob->zones[i]; | |
25d0479a JP |
393 | pr_info("Zone %7s: Available graphics memory: %llu kiB\n", |
394 | zone->name, (unsigned long long)zone->max_mem >> 10); | |
5fd9cbad | 395 | } |
c96af79e | 396 | ttm_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE)); |
2334b75f | 397 | ttm_dma_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE)); |
ba4e7d97 | 398 | return 0; |
5fd9cbad TH |
399 | out_no_zone: |
400 | ttm_mem_global_release(glob); | |
401 | return ret; | |
ba4e7d97 TH |
402 | } |
403 | EXPORT_SYMBOL(ttm_mem_global_init); | |
404 | ||
405 | void ttm_mem_global_release(struct ttm_mem_global *glob) | |
406 | { | |
5fd9cbad TH |
407 | unsigned int i; |
408 | struct ttm_mem_zone *zone; | |
409 | ||
1403b1a3 PN |
410 | /* let the page allocator first stop the shrink work. */ |
411 | ttm_page_alloc_fini(); | |
2334b75f | 412 | ttm_dma_page_alloc_fini(); |
1403b1a3 | 413 | |
ba4e7d97 TH |
414 | flush_workqueue(glob->swap_queue); |
415 | destroy_workqueue(glob->swap_queue); | |
416 | glob->swap_queue = NULL; | |
5fd9cbad TH |
417 | for (i = 0; i < glob->num_zones; ++i) { |
418 | zone = glob->zones[i]; | |
419 | kobject_del(&zone->kobj); | |
420 | kobject_put(&zone->kobj); | |
1403b1a3 | 421 | } |
5fd9cbad TH |
422 | kobject_del(&glob->kobj); |
423 | kobject_put(&glob->kobj); | |
ba4e7d97 TH |
424 | } |
425 | EXPORT_SYMBOL(ttm_mem_global_release); | |
426 | ||
5fd9cbad | 427 | static void ttm_check_swapping(struct ttm_mem_global *glob) |
ba4e7d97 | 428 | { |
5fd9cbad TH |
429 | bool needs_swapping = false; |
430 | unsigned int i; | |
431 | struct ttm_mem_zone *zone; | |
ba4e7d97 TH |
432 | |
433 | spin_lock(&glob->lock); | |
5fd9cbad TH |
434 | for (i = 0; i < glob->num_zones; ++i) { |
435 | zone = glob->zones[i]; | |
436 | if (zone->used_mem > zone->swap_limit) { | |
437 | needs_swapping = true; | |
438 | break; | |
439 | } | |
440 | } | |
441 | ||
ba4e7d97 TH |
442 | spin_unlock(&glob->lock); |
443 | ||
444 | if (unlikely(needs_swapping)) | |
445 | (void)queue_work(glob->swap_queue, &glob->work); | |
446 | ||
447 | } | |
448 | ||
5fd9cbad TH |
449 | static void ttm_mem_global_free_zone(struct ttm_mem_global *glob, |
450 | struct ttm_mem_zone *single_zone, | |
451 | uint64_t amount) | |
ba4e7d97 | 452 | { |
5fd9cbad TH |
453 | unsigned int i; |
454 | struct ttm_mem_zone *zone; | |
455 | ||
ba4e7d97 | 456 | spin_lock(&glob->lock); |
5fd9cbad TH |
457 | for (i = 0; i < glob->num_zones; ++i) { |
458 | zone = glob->zones[i]; | |
459 | if (single_zone && zone != single_zone) | |
460 | continue; | |
461 | zone->used_mem -= amount; | |
462 | } | |
ba4e7d97 TH |
463 | spin_unlock(&glob->lock); |
464 | } | |
465 | ||
5fd9cbad TH |
466 | void ttm_mem_global_free(struct ttm_mem_global *glob, |
467 | uint64_t amount) | |
468 | { | |
469 | return ttm_mem_global_free_zone(glob, NULL, amount); | |
470 | } | |
4bfd75cb | 471 | EXPORT_SYMBOL(ttm_mem_global_free); |
5fd9cbad | 472 | |
ba4e7d97 | 473 | static int ttm_mem_global_reserve(struct ttm_mem_global *glob, |
5fd9cbad TH |
474 | struct ttm_mem_zone *single_zone, |
475 | uint64_t amount, bool reserve) | |
ba4e7d97 TH |
476 | { |
477 | uint64_t limit; | |
ba4e7d97 | 478 | int ret = -ENOMEM; |
5fd9cbad TH |
479 | unsigned int i; |
480 | struct ttm_mem_zone *zone; | |
ba4e7d97 TH |
481 | |
482 | spin_lock(&glob->lock); | |
5fd9cbad TH |
483 | for (i = 0; i < glob->num_zones; ++i) { |
484 | zone = glob->zones[i]; | |
485 | if (single_zone && zone != single_zone) | |
486 | continue; | |
ba4e7d97 | 487 | |
5fd9cbad TH |
488 | limit = (capable(CAP_SYS_ADMIN)) ? |
489 | zone->emer_mem : zone->max_mem; | |
ba4e7d97 | 490 | |
5fd9cbad TH |
491 | if (zone->used_mem > limit) |
492 | goto out_unlock; | |
493 | } | |
ba4e7d97 TH |
494 | |
495 | if (reserve) { | |
5fd9cbad TH |
496 | for (i = 0; i < glob->num_zones; ++i) { |
497 | zone = glob->zones[i]; | |
498 | if (single_zone && zone != single_zone) | |
499 | continue; | |
500 | zone->used_mem += amount; | |
501 | } | |
ba4e7d97 | 502 | } |
5fd9cbad | 503 | |
ba4e7d97 TH |
504 | ret = 0; |
505 | out_unlock: | |
506 | spin_unlock(&glob->lock); | |
507 | ttm_check_swapping(glob); | |
508 | ||
509 | return ret; | |
510 | } | |
511 | ||
5fd9cbad TH |
512 | |
513 | static int ttm_mem_global_alloc_zone(struct ttm_mem_global *glob, | |
514 | struct ttm_mem_zone *single_zone, | |
515 | uint64_t memory, | |
516 | bool no_wait, bool interruptible) | |
ba4e7d97 TH |
517 | { |
518 | int count = TTM_MEMORY_ALLOC_RETRIES; | |
519 | ||
5fd9cbad TH |
520 | while (unlikely(ttm_mem_global_reserve(glob, |
521 | single_zone, | |
522 | memory, true) | |
ba4e7d97 TH |
523 | != 0)) { |
524 | if (no_wait) | |
525 | return -ENOMEM; | |
526 | if (unlikely(count-- == 0)) | |
527 | return -ENOMEM; | |
528 | ttm_shrink(glob, false, memory + (memory >> 2) + 16); | |
529 | } | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
5fd9cbad TH |
534 | int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory, |
535 | bool no_wait, bool interruptible) | |
536 | { | |
537 | /** | |
538 | * Normal allocations of kernel memory are registered in | |
539 | * all zones. | |
540 | */ | |
541 | ||
542 | return ttm_mem_global_alloc_zone(glob, NULL, memory, no_wait, | |
543 | interruptible); | |
544 | } | |
4bfd75cb | 545 | EXPORT_SYMBOL(ttm_mem_global_alloc); |
5fd9cbad TH |
546 | |
547 | int ttm_mem_global_alloc_page(struct ttm_mem_global *glob, | |
548 | struct page *page, | |
549 | bool no_wait, bool interruptible) | |
550 | { | |
551 | ||
552 | struct ttm_mem_zone *zone = NULL; | |
553 | ||
554 | /** | |
555 | * Page allocations may be registed in a single zone | |
556 | * only if highmem or !dma32. | |
557 | */ | |
558 | ||
559 | #ifdef CONFIG_HIGHMEM | |
560 | if (PageHighMem(page) && glob->zone_highmem != NULL) | |
561 | zone = glob->zone_highmem; | |
562 | #else | |
563 | if (glob->zone_dma32 && page_to_pfn(page) > 0x00100000UL) | |
564 | zone = glob->zone_kernel; | |
565 | #endif | |
566 | return ttm_mem_global_alloc_zone(glob, zone, PAGE_SIZE, no_wait, | |
567 | interruptible); | |
568 | } | |
569 | ||
570 | void ttm_mem_global_free_page(struct ttm_mem_global *glob, struct page *page) | |
571 | { | |
572 | struct ttm_mem_zone *zone = NULL; | |
573 | ||
574 | #ifdef CONFIG_HIGHMEM | |
575 | if (PageHighMem(page) && glob->zone_highmem != NULL) | |
576 | zone = glob->zone_highmem; | |
577 | #else | |
578 | if (glob->zone_dma32 && page_to_pfn(page) > 0x00100000UL) | |
579 | zone = glob->zone_kernel; | |
580 | #endif | |
581 | ttm_mem_global_free_zone(glob, zone, PAGE_SIZE); | |
582 | } | |
583 | ||
584 | ||
ba4e7d97 TH |
585 | size_t ttm_round_pot(size_t size) |
586 | { | |
587 | if ((size & (size - 1)) == 0) | |
588 | return size; | |
589 | else if (size > PAGE_SIZE) | |
590 | return PAGE_ALIGN(size); | |
591 | else { | |
592 | size_t tmp_size = 4; | |
593 | ||
594 | while (tmp_size < size) | |
595 | tmp_size <<= 1; | |
596 | ||
597 | return tmp_size; | |
598 | } | |
599 | return 0; | |
600 | } | |
4bfd75cb | 601 | EXPORT_SYMBOL(ttm_round_pot); |