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ba4e7d97 TH |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright (c) 2007-2009 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 | /* | |
28 | * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> | |
29 | */ | |
30 | ||
760285e7 DH |
31 | #include <drm/ttm/ttm_bo_driver.h> |
32 | #include <drm/ttm/ttm_placement.h> | |
ba4e7d97 TH |
33 | #include <linux/io.h> |
34 | #include <linux/highmem.h> | |
35 | #include <linux/wait.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
ba4e7d97 | 37 | #include <linux/vmalloc.h> |
ba4e7d97 TH |
38 | #include <linux/module.h> |
39 | ||
40 | void ttm_bo_free_old_node(struct ttm_buffer_object *bo) | |
41 | { | |
42311ff9 | 42 | ttm_bo_mem_put(bo, &bo->mem); |
ba4e7d97 TH |
43 | } |
44 | ||
45 | int ttm_bo_move_ttm(struct ttm_buffer_object *bo, | |
97a875cb | 46 | bool evict, |
9d87fa21 | 47 | bool no_wait_gpu, struct ttm_mem_reg *new_mem) |
ba4e7d97 TH |
48 | { |
49 | struct ttm_tt *ttm = bo->ttm; | |
50 | struct ttm_mem_reg *old_mem = &bo->mem; | |
ba4e7d97 TH |
51 | int ret; |
52 | ||
53 | if (old_mem->mem_type != TTM_PL_SYSTEM) { | |
54 | ttm_tt_unbind(ttm); | |
55 | ttm_bo_free_old_node(bo); | |
56 | ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM, | |
57 | TTM_PL_MASK_MEM); | |
58 | old_mem->mem_type = TTM_PL_SYSTEM; | |
ba4e7d97 TH |
59 | } |
60 | ||
61 | ret = ttm_tt_set_placement_caching(ttm, new_mem->placement); | |
62 | if (unlikely(ret != 0)) | |
63 | return ret; | |
64 | ||
65 | if (new_mem->mem_type != TTM_PL_SYSTEM) { | |
66 | ret = ttm_tt_bind(ttm, new_mem); | |
67 | if (unlikely(ret != 0)) | |
68 | return ret; | |
69 | } | |
70 | ||
71 | *old_mem = *new_mem; | |
72 | new_mem->mm_node = NULL; | |
110b20c3 | 73 | |
ba4e7d97 TH |
74 | return 0; |
75 | } | |
76 | EXPORT_SYMBOL(ttm_bo_move_ttm); | |
77 | ||
eba67093 | 78 | int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible) |
82c5da6b | 79 | { |
eba67093 TH |
80 | if (likely(man->io_reserve_fastpath)) |
81 | return 0; | |
82 | ||
83 | if (interruptible) | |
84 | return mutex_lock_interruptible(&man->io_reserve_mutex); | |
85 | ||
86 | mutex_lock(&man->io_reserve_mutex); | |
87 | return 0; | |
88 | } | |
afe6804c | 89 | EXPORT_SYMBOL(ttm_mem_io_lock); |
82c5da6b | 90 | |
eba67093 TH |
91 | void ttm_mem_io_unlock(struct ttm_mem_type_manager *man) |
92 | { | |
93 | if (likely(man->io_reserve_fastpath)) | |
94 | return; | |
95 | ||
96 | mutex_unlock(&man->io_reserve_mutex); | |
97 | } | |
afe6804c | 98 | EXPORT_SYMBOL(ttm_mem_io_unlock); |
eba67093 TH |
99 | |
100 | static int ttm_mem_io_evict(struct ttm_mem_type_manager *man) | |
101 | { | |
102 | struct ttm_buffer_object *bo; | |
103 | ||
104 | if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru)) | |
105 | return -EAGAIN; | |
106 | ||
107 | bo = list_first_entry(&man->io_reserve_lru, | |
108 | struct ttm_buffer_object, | |
109 | io_reserve_lru); | |
110 | list_del_init(&bo->io_reserve_lru); | |
111 | ttm_bo_unmap_virtual_locked(bo); | |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
afe6804c DA |
116 | |
117 | int ttm_mem_io_reserve(struct ttm_bo_device *bdev, | |
118 | struct ttm_mem_reg *mem) | |
eba67093 TH |
119 | { |
120 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
121 | int ret = 0; | |
122 | ||
123 | if (!bdev->driver->io_mem_reserve) | |
124 | return 0; | |
125 | if (likely(man->io_reserve_fastpath)) | |
126 | return bdev->driver->io_mem_reserve(bdev, mem); | |
127 | ||
128 | if (bdev->driver->io_mem_reserve && | |
129 | mem->bus.io_reserved_count++ == 0) { | |
130 | retry: | |
0c321c79 | 131 | ret = bdev->driver->io_mem_reserve(bdev, mem); |
eba67093 TH |
132 | if (ret == -EAGAIN) { |
133 | ret = ttm_mem_io_evict(man); | |
134 | if (ret == 0) | |
135 | goto retry; | |
136 | } | |
137 | } | |
138 | return ret; | |
139 | } | |
afe6804c | 140 | EXPORT_SYMBOL(ttm_mem_io_reserve); |
eba67093 | 141 | |
afe6804c DA |
142 | void ttm_mem_io_free(struct ttm_bo_device *bdev, |
143 | struct ttm_mem_reg *mem) | |
eba67093 TH |
144 | { |
145 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
146 | ||
147 | if (likely(man->io_reserve_fastpath)) | |
148 | return; | |
149 | ||
150 | if (bdev->driver->io_mem_reserve && | |
151 | --mem->bus.io_reserved_count == 0 && | |
152 | bdev->driver->io_mem_free) | |
153 | bdev->driver->io_mem_free(bdev, mem); | |
154 | ||
155 | } | |
afe6804c | 156 | EXPORT_SYMBOL(ttm_mem_io_free); |
eba67093 TH |
157 | |
158 | int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo) | |
159 | { | |
160 | struct ttm_mem_reg *mem = &bo->mem; | |
161 | int ret; | |
162 | ||
163 | if (!mem->bus.io_reserved_vm) { | |
164 | struct ttm_mem_type_manager *man = | |
165 | &bo->bdev->man[mem->mem_type]; | |
166 | ||
167 | ret = ttm_mem_io_reserve(bo->bdev, mem); | |
82c5da6b JG |
168 | if (unlikely(ret != 0)) |
169 | return ret; | |
eba67093 TH |
170 | mem->bus.io_reserved_vm = true; |
171 | if (man->use_io_reserve_lru) | |
172 | list_add_tail(&bo->io_reserve_lru, | |
173 | &man->io_reserve_lru); | |
82c5da6b JG |
174 | } |
175 | return 0; | |
176 | } | |
177 | ||
eba67093 | 178 | void ttm_mem_io_free_vm(struct ttm_buffer_object *bo) |
82c5da6b | 179 | { |
eba67093 TH |
180 | struct ttm_mem_reg *mem = &bo->mem; |
181 | ||
182 | if (mem->bus.io_reserved_vm) { | |
183 | mem->bus.io_reserved_vm = false; | |
184 | list_del_init(&bo->io_reserve_lru); | |
185 | ttm_mem_io_free(bo->bdev, mem); | |
82c5da6b JG |
186 | } |
187 | } | |
188 | ||
ba4e7d97 TH |
189 | int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, |
190 | void **virtual) | |
191 | { | |
eba67093 | 192 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; |
ba4e7d97 TH |
193 | int ret; |
194 | void *addr; | |
195 | ||
196 | *virtual = NULL; | |
eba67093 | 197 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 198 | ret = ttm_mem_io_reserve(bdev, mem); |
eba67093 | 199 | ttm_mem_io_unlock(man); |
9e51159c | 200 | if (ret || !mem->bus.is_iomem) |
ba4e7d97 TH |
201 | return ret; |
202 | ||
82c5da6b JG |
203 | if (mem->bus.addr) { |
204 | addr = mem->bus.addr; | |
205 | } else { | |
ba4e7d97 | 206 | if (mem->placement & TTM_PL_FLAG_WC) |
82c5da6b | 207 | addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size); |
ba4e7d97 | 208 | else |
82c5da6b JG |
209 | addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size); |
210 | if (!addr) { | |
eba67093 | 211 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 212 | ttm_mem_io_free(bdev, mem); |
eba67093 | 213 | ttm_mem_io_unlock(man); |
ba4e7d97 | 214 | return -ENOMEM; |
82c5da6b | 215 | } |
ba4e7d97 TH |
216 | } |
217 | *virtual = addr; | |
218 | return 0; | |
219 | } | |
220 | ||
221 | void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, | |
222 | void *virtual) | |
223 | { | |
224 | struct ttm_mem_type_manager *man; | |
225 | ||
226 | man = &bdev->man[mem->mem_type]; | |
227 | ||
0c321c79 | 228 | if (virtual && mem->bus.addr == NULL) |
ba4e7d97 | 229 | iounmap(virtual); |
eba67093 | 230 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 231 | ttm_mem_io_free(bdev, mem); |
eba67093 | 232 | ttm_mem_io_unlock(man); |
ba4e7d97 TH |
233 | } |
234 | ||
235 | static int ttm_copy_io_page(void *dst, void *src, unsigned long page) | |
236 | { | |
237 | uint32_t *dstP = | |
238 | (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT)); | |
239 | uint32_t *srcP = | |
240 | (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT)); | |
241 | ||
242 | int i; | |
243 | for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i) | |
244 | iowrite32(ioread32(srcP++), dstP++); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src, | |
542c6f6d TH |
249 | unsigned long page, |
250 | pgprot_t prot) | |
ba4e7d97 | 251 | { |
b1e5f172 | 252 | struct page *d = ttm->pages[page]; |
ba4e7d97 TH |
253 | void *dst; |
254 | ||
255 | if (!d) | |
256 | return -ENOMEM; | |
257 | ||
258 | src = (void *)((unsigned long)src + (page << PAGE_SHIFT)); | |
542c6f6d TH |
259 | |
260 | #ifdef CONFIG_X86 | |
3e4d3af5 | 261 | dst = kmap_atomic_prot(d, prot); |
542c6f6d | 262 | #else |
6d0897ba | 263 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
264 | dst = vmap(&d, 1, 0, prot); |
265 | else | |
266 | dst = kmap(d); | |
267 | #endif | |
ba4e7d97 TH |
268 | if (!dst) |
269 | return -ENOMEM; | |
270 | ||
271 | memcpy_fromio(dst, src, PAGE_SIZE); | |
542c6f6d TH |
272 | |
273 | #ifdef CONFIG_X86 | |
3e4d3af5 | 274 | kunmap_atomic(dst); |
542c6f6d | 275 | #else |
6d0897ba | 276 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
277 | vunmap(dst); |
278 | else | |
279 | kunmap(d); | |
280 | #endif | |
281 | ||
ba4e7d97 TH |
282 | return 0; |
283 | } | |
284 | ||
285 | static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst, | |
542c6f6d TH |
286 | unsigned long page, |
287 | pgprot_t prot) | |
ba4e7d97 | 288 | { |
b1e5f172 | 289 | struct page *s = ttm->pages[page]; |
ba4e7d97 TH |
290 | void *src; |
291 | ||
292 | if (!s) | |
293 | return -ENOMEM; | |
294 | ||
295 | dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT)); | |
542c6f6d | 296 | #ifdef CONFIG_X86 |
3e4d3af5 | 297 | src = kmap_atomic_prot(s, prot); |
542c6f6d | 298 | #else |
6d0897ba | 299 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
300 | src = vmap(&s, 1, 0, prot); |
301 | else | |
302 | src = kmap(s); | |
303 | #endif | |
ba4e7d97 TH |
304 | if (!src) |
305 | return -ENOMEM; | |
306 | ||
307 | memcpy_toio(dst, src, PAGE_SIZE); | |
542c6f6d TH |
308 | |
309 | #ifdef CONFIG_X86 | |
3e4d3af5 | 310 | kunmap_atomic(src); |
542c6f6d | 311 | #else |
6d0897ba | 312 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
313 | vunmap(src); |
314 | else | |
315 | kunmap(s); | |
316 | #endif | |
317 | ||
ba4e7d97 TH |
318 | return 0; |
319 | } | |
320 | ||
321 | int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, | |
97a875cb | 322 | bool evict, bool no_wait_gpu, |
9d87fa21 | 323 | struct ttm_mem_reg *new_mem) |
ba4e7d97 TH |
324 | { |
325 | struct ttm_bo_device *bdev = bo->bdev; | |
326 | struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; | |
327 | struct ttm_tt *ttm = bo->ttm; | |
328 | struct ttm_mem_reg *old_mem = &bo->mem; | |
e22469ca | 329 | struct ttm_mem_reg old_copy = *old_mem; |
ba4e7d97 TH |
330 | void *old_iomap; |
331 | void *new_iomap; | |
332 | int ret; | |
ba4e7d97 TH |
333 | unsigned long i; |
334 | unsigned long page; | |
335 | unsigned long add = 0; | |
336 | int dir; | |
337 | ||
338 | ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap); | |
339 | if (ret) | |
340 | return ret; | |
341 | ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap); | |
342 | if (ret) | |
343 | goto out; | |
344 | ||
345 | if (old_iomap == NULL && new_iomap == NULL) | |
346 | goto out2; | |
347 | if (old_iomap == NULL && ttm == NULL) | |
348 | goto out2; | |
349 | ||
b1e5f172 JG |
350 | if (ttm->state == tt_unpopulated) { |
351 | ret = ttm->bdev->driver->ttm_tt_populate(ttm); | |
63054186 DA |
352 | if (ret) { |
353 | /* if we fail here don't nuke the mm node | |
354 | * as the bo still owns it */ | |
355 | old_copy.mm_node = NULL; | |
b1e5f172 | 356 | goto out1; |
63054186 | 357 | } |
b1e5f172 JG |
358 | } |
359 | ||
ba4e7d97 TH |
360 | add = 0; |
361 | dir = 1; | |
362 | ||
363 | if ((old_mem->mem_type == new_mem->mem_type) && | |
d961db75 | 364 | (new_mem->start < old_mem->start + old_mem->size)) { |
ba4e7d97 TH |
365 | dir = -1; |
366 | add = new_mem->num_pages - 1; | |
367 | } | |
368 | ||
369 | for (i = 0; i < new_mem->num_pages; ++i) { | |
370 | page = i * dir + add; | |
542c6f6d TH |
371 | if (old_iomap == NULL) { |
372 | pgprot_t prot = ttm_io_prot(old_mem->placement, | |
373 | PAGE_KERNEL); | |
374 | ret = ttm_copy_ttm_io_page(ttm, new_iomap, page, | |
375 | prot); | |
376 | } else if (new_iomap == NULL) { | |
377 | pgprot_t prot = ttm_io_prot(new_mem->placement, | |
378 | PAGE_KERNEL); | |
379 | ret = ttm_copy_io_ttm_page(ttm, old_iomap, page, | |
380 | prot); | |
381 | } else | |
ba4e7d97 | 382 | ret = ttm_copy_io_page(new_iomap, old_iomap, page); |
63054186 DA |
383 | if (ret) { |
384 | /* failing here, means keep old copy as-is */ | |
385 | old_copy.mm_node = NULL; | |
ba4e7d97 | 386 | goto out1; |
63054186 | 387 | } |
ba4e7d97 TH |
388 | } |
389 | mb(); | |
390 | out2: | |
eba67093 | 391 | old_copy = *old_mem; |
ba4e7d97 TH |
392 | *old_mem = *new_mem; |
393 | new_mem->mm_node = NULL; | |
ba4e7d97 TH |
394 | |
395 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) { | |
396 | ttm_tt_unbind(ttm); | |
397 | ttm_tt_destroy(ttm); | |
398 | bo->ttm = NULL; | |
399 | } | |
400 | ||
401 | out1: | |
eba67093 | 402 | ttm_mem_reg_iounmap(bdev, old_mem, new_iomap); |
ba4e7d97 TH |
403 | out: |
404 | ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap); | |
b921bae2 | 405 | ttm_bo_mem_put(bo, &old_copy); |
ba4e7d97 TH |
406 | return ret; |
407 | } | |
408 | EXPORT_SYMBOL(ttm_bo_move_memcpy); | |
409 | ||
410 | static void ttm_transfered_destroy(struct ttm_buffer_object *bo) | |
411 | { | |
412 | kfree(bo); | |
413 | } | |
414 | ||
415 | /** | |
416 | * ttm_buffer_object_transfer | |
417 | * | |
418 | * @bo: A pointer to a struct ttm_buffer_object. | |
419 | * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, | |
420 | * holding the data of @bo with the old placement. | |
421 | * | |
422 | * This is a utility function that may be called after an accelerated move | |
423 | * has been scheduled. A new buffer object is created as a placeholder for | |
424 | * the old data while it's being copied. When that buffer object is idle, | |
425 | * it can be destroyed, releasing the space of the old placement. | |
426 | * Returns: | |
427 | * !0: Failure. | |
428 | */ | |
429 | ||
430 | static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, | |
431 | struct ttm_buffer_object **new_obj) | |
432 | { | |
433 | struct ttm_buffer_object *fbo; | |
434 | struct ttm_bo_device *bdev = bo->bdev; | |
435 | struct ttm_bo_driver *driver = bdev->driver; | |
436 | ||
ff7c60c5 | 437 | fbo = kmalloc(sizeof(*fbo), GFP_KERNEL); |
ba4e7d97 TH |
438 | if (!fbo) |
439 | return -ENOMEM; | |
440 | ||
441 | *fbo = *bo; | |
442 | ||
443 | /** | |
444 | * Fix up members that we shouldn't copy directly: | |
445 | * TODO: Explicit member copy would probably be better here. | |
446 | */ | |
447 | ||
ba4e7d97 TH |
448 | init_waitqueue_head(&fbo->event_queue); |
449 | INIT_LIST_HEAD(&fbo->ddestroy); | |
450 | INIT_LIST_HEAD(&fbo->lru); | |
451 | INIT_LIST_HEAD(&fbo->swap); | |
eba67093 | 452 | INIT_LIST_HEAD(&fbo->io_reserve_lru); |
ba4e7d97 | 453 | fbo->vm_node = NULL; |
0fbecd40 | 454 | atomic_set(&fbo->cpu_writers, 0); |
ba4e7d97 | 455 | |
ff7c60c5 DV |
456 | spin_lock(&bdev->fence_lock); |
457 | if (bo->sync_obj) | |
458 | fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
459 | else | |
460 | fbo->sync_obj = NULL; | |
461 | spin_unlock(&bdev->fence_lock); | |
ba4e7d97 TH |
462 | kref_init(&fbo->list_kref); |
463 | kref_init(&fbo->kref); | |
464 | fbo->destroy = &ttm_transfered_destroy; | |
57de4ba9 | 465 | fbo->acc_size = 0; |
ba4e7d97 TH |
466 | |
467 | *new_obj = fbo; | |
468 | return 0; | |
469 | } | |
470 | ||
471 | pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp) | |
472 | { | |
473 | #if defined(__i386__) || defined(__x86_64__) | |
474 | if (caching_flags & TTM_PL_FLAG_WC) | |
475 | tmp = pgprot_writecombine(tmp); | |
476 | else if (boot_cpu_data.x86 > 3) | |
477 | tmp = pgprot_noncached(tmp); | |
478 | ||
479 | #elif defined(__powerpc__) | |
480 | if (!(caching_flags & TTM_PL_FLAG_CACHED)) { | |
481 | pgprot_val(tmp) |= _PAGE_NO_CACHE; | |
482 | if (caching_flags & TTM_PL_FLAG_UNCACHED) | |
483 | pgprot_val(tmp) |= _PAGE_GUARDED; | |
484 | } | |
485 | #endif | |
486 | #if defined(__ia64__) | |
487 | if (caching_flags & TTM_PL_FLAG_WC) | |
488 | tmp = pgprot_writecombine(tmp); | |
489 | else | |
490 | tmp = pgprot_noncached(tmp); | |
491 | #endif | |
04cf55e1 | 492 | #if defined(__sparc__) || defined(__mips__) |
ba4e7d97 TH |
493 | if (!(caching_flags & TTM_PL_FLAG_CACHED)) |
494 | tmp = pgprot_noncached(tmp); | |
495 | #endif | |
496 | return tmp; | |
497 | } | |
4bfd75cb | 498 | EXPORT_SYMBOL(ttm_io_prot); |
ba4e7d97 TH |
499 | |
500 | static int ttm_bo_ioremap(struct ttm_buffer_object *bo, | |
82c5da6b JG |
501 | unsigned long offset, |
502 | unsigned long size, | |
ba4e7d97 TH |
503 | struct ttm_bo_kmap_obj *map) |
504 | { | |
ba4e7d97 | 505 | struct ttm_mem_reg *mem = &bo->mem; |
ba4e7d97 | 506 | |
82c5da6b | 507 | if (bo->mem.bus.addr) { |
ba4e7d97 | 508 | map->bo_kmap_type = ttm_bo_map_premapped; |
82c5da6b | 509 | map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset); |
ba4e7d97 TH |
510 | } else { |
511 | map->bo_kmap_type = ttm_bo_map_iomap; | |
512 | if (mem->placement & TTM_PL_FLAG_WC) | |
82c5da6b JG |
513 | map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset, |
514 | size); | |
ba4e7d97 | 515 | else |
82c5da6b JG |
516 | map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset, |
517 | size); | |
ba4e7d97 TH |
518 | } |
519 | return (!map->virtual) ? -ENOMEM : 0; | |
520 | } | |
521 | ||
522 | static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, | |
523 | unsigned long start_page, | |
524 | unsigned long num_pages, | |
525 | struct ttm_bo_kmap_obj *map) | |
526 | { | |
527 | struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot; | |
528 | struct ttm_tt *ttm = bo->ttm; | |
b1e5f172 | 529 | int ret; |
ba4e7d97 TH |
530 | |
531 | BUG_ON(!ttm); | |
b1e5f172 JG |
532 | |
533 | if (ttm->state == tt_unpopulated) { | |
534 | ret = ttm->bdev->driver->ttm_tt_populate(ttm); | |
535 | if (ret) | |
536 | return ret; | |
537 | } | |
538 | ||
ba4e7d97 TH |
539 | if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) { |
540 | /* | |
541 | * We're mapping a single page, and the desired | |
542 | * page protection is consistent with the bo. | |
543 | */ | |
544 | ||
545 | map->bo_kmap_type = ttm_bo_map_kmap; | |
b1e5f172 | 546 | map->page = ttm->pages[start_page]; |
ba4e7d97 TH |
547 | map->virtual = kmap(map->page); |
548 | } else { | |
ba4e7d97 TH |
549 | /* |
550 | * We need to use vmap to get the desired page protection | |
af901ca1 | 551 | * or to make the buffer object look contiguous. |
ba4e7d97 TH |
552 | */ |
553 | prot = (mem->placement & TTM_PL_FLAG_CACHED) ? | |
554 | PAGE_KERNEL : | |
555 | ttm_io_prot(mem->placement, PAGE_KERNEL); | |
556 | map->bo_kmap_type = ttm_bo_map_vmap; | |
557 | map->virtual = vmap(ttm->pages + start_page, num_pages, | |
558 | 0, prot); | |
559 | } | |
560 | return (!map->virtual) ? -ENOMEM : 0; | |
561 | } | |
562 | ||
563 | int ttm_bo_kmap(struct ttm_buffer_object *bo, | |
564 | unsigned long start_page, unsigned long num_pages, | |
565 | struct ttm_bo_kmap_obj *map) | |
566 | { | |
eba67093 TH |
567 | struct ttm_mem_type_manager *man = |
568 | &bo->bdev->man[bo->mem.mem_type]; | |
82c5da6b | 569 | unsigned long offset, size; |
ba4e7d97 | 570 | int ret; |
ba4e7d97 TH |
571 | |
572 | BUG_ON(!list_empty(&bo->swap)); | |
573 | map->virtual = NULL; | |
82c5da6b | 574 | map->bo = bo; |
ba4e7d97 TH |
575 | if (num_pages > bo->num_pages) |
576 | return -EINVAL; | |
577 | if (start_page > bo->num_pages) | |
578 | return -EINVAL; | |
579 | #if 0 | |
580 | if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC)) | |
581 | return -EPERM; | |
582 | #endif | |
eba67093 | 583 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 584 | ret = ttm_mem_io_reserve(bo->bdev, &bo->mem); |
eba67093 | 585 | ttm_mem_io_unlock(man); |
ba4e7d97 TH |
586 | if (ret) |
587 | return ret; | |
82c5da6b | 588 | if (!bo->mem.bus.is_iomem) { |
ba4e7d97 TH |
589 | return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); |
590 | } else { | |
82c5da6b JG |
591 | offset = start_page << PAGE_SHIFT; |
592 | size = num_pages << PAGE_SHIFT; | |
593 | return ttm_bo_ioremap(bo, offset, size, map); | |
ba4e7d97 TH |
594 | } |
595 | } | |
596 | EXPORT_SYMBOL(ttm_bo_kmap); | |
597 | ||
598 | void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) | |
599 | { | |
eba67093 TH |
600 | struct ttm_buffer_object *bo = map->bo; |
601 | struct ttm_mem_type_manager *man = | |
602 | &bo->bdev->man[bo->mem.mem_type]; | |
603 | ||
ba4e7d97 TH |
604 | if (!map->virtual) |
605 | return; | |
606 | switch (map->bo_kmap_type) { | |
607 | case ttm_bo_map_iomap: | |
608 | iounmap(map->virtual); | |
609 | break; | |
610 | case ttm_bo_map_vmap: | |
611 | vunmap(map->virtual); | |
612 | break; | |
613 | case ttm_bo_map_kmap: | |
614 | kunmap(map->page); | |
615 | break; | |
616 | case ttm_bo_map_premapped: | |
617 | break; | |
618 | default: | |
619 | BUG(); | |
620 | } | |
eba67093 TH |
621 | (void) ttm_mem_io_lock(man, false); |
622 | ttm_mem_io_free(map->bo->bdev, &map->bo->mem); | |
623 | ttm_mem_io_unlock(man); | |
ba4e7d97 TH |
624 | map->virtual = NULL; |
625 | map->page = NULL; | |
626 | } | |
627 | EXPORT_SYMBOL(ttm_bo_kunmap); | |
628 | ||
ba4e7d97 TH |
629 | int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, |
630 | void *sync_obj, | |
97a875cb | 631 | bool evict, |
9d87fa21 | 632 | bool no_wait_gpu, |
ba4e7d97 TH |
633 | struct ttm_mem_reg *new_mem) |
634 | { | |
635 | struct ttm_bo_device *bdev = bo->bdev; | |
636 | struct ttm_bo_driver *driver = bdev->driver; | |
637 | struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; | |
638 | struct ttm_mem_reg *old_mem = &bo->mem; | |
639 | int ret; | |
ba4e7d97 TH |
640 | struct ttm_buffer_object *ghost_obj; |
641 | void *tmp_obj = NULL; | |
642 | ||
702adba2 | 643 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
644 | if (bo->sync_obj) { |
645 | tmp_obj = bo->sync_obj; | |
646 | bo->sync_obj = NULL; | |
647 | } | |
648 | bo->sync_obj = driver->sync_obj_ref(sync_obj); | |
ba4e7d97 TH |
649 | if (evict) { |
650 | ret = ttm_bo_wait(bo, false, false, false); | |
702adba2 | 651 | spin_unlock(&bdev->fence_lock); |
4677f15c TH |
652 | if (tmp_obj) |
653 | driver->sync_obj_unref(&tmp_obj); | |
ba4e7d97 TH |
654 | if (ret) |
655 | return ret; | |
656 | ||
ba4e7d97 TH |
657 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
658 | (bo->ttm != NULL)) { | |
659 | ttm_tt_unbind(bo->ttm); | |
660 | ttm_tt_destroy(bo->ttm); | |
661 | bo->ttm = NULL; | |
662 | } | |
eac20953 | 663 | ttm_bo_free_old_node(bo); |
ba4e7d97 TH |
664 | } else { |
665 | /** | |
666 | * This should help pipeline ordinary buffer moves. | |
667 | * | |
668 | * Hang old buffer memory on a new buffer object, | |
669 | * and leave it to be released when the GPU | |
670 | * operation has completed. | |
671 | */ | |
672 | ||
673 | set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
702adba2 | 674 | spin_unlock(&bdev->fence_lock); |
4677f15c TH |
675 | if (tmp_obj) |
676 | driver->sync_obj_unref(&tmp_obj); | |
ba4e7d97 | 677 | |
ff7c60c5 | 678 | ret = ttm_buffer_object_transfer(bo, &ghost_obj); |
ba4e7d97 TH |
679 | if (ret) |
680 | return ret; | |
681 | ||
682 | /** | |
683 | * If we're not moving to fixed memory, the TTM object | |
684 | * needs to stay alive. Otherwhise hang it on the ghost | |
685 | * bo to be unbound and destroyed. | |
686 | */ | |
687 | ||
688 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
689 | ghost_obj->ttm = NULL; | |
690 | else | |
691 | bo->ttm = NULL; | |
692 | ||
693 | ttm_bo_unreserve(ghost_obj); | |
694 | ttm_bo_unref(&ghost_obj); | |
695 | } | |
696 | ||
697 | *old_mem = *new_mem; | |
698 | new_mem->mm_node = NULL; | |
110b20c3 | 699 | |
ba4e7d97 TH |
700 | return 0; |
701 | } | |
702 | EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); |