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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> | |
72525b3f | 33 | #include <drm/drm_vma_manager.h> |
ba4e7d97 TH |
34 | #include <linux/io.h> |
35 | #include <linux/highmem.h> | |
36 | #include <linux/wait.h> | |
5a0e3ad6 | 37 | #include <linux/slab.h> |
ba4e7d97 | 38 | #include <linux/vmalloc.h> |
ba4e7d97 | 39 | #include <linux/module.h> |
f2c24b83 | 40 | #include <linux/reservation.h> |
ba4e7d97 TH |
41 | |
42 | void ttm_bo_free_old_node(struct ttm_buffer_object *bo) | |
43 | { | |
42311ff9 | 44 | ttm_bo_mem_put(bo, &bo->mem); |
ba4e7d97 TH |
45 | } |
46 | ||
47 | int ttm_bo_move_ttm(struct ttm_buffer_object *bo, | |
3e98d829 | 48 | struct ttm_operation_ctx *ctx, |
4e2f0caa | 49 | struct ttm_mem_reg *new_mem) |
ba4e7d97 TH |
50 | { |
51 | struct ttm_tt *ttm = bo->ttm; | |
52 | struct ttm_mem_reg *old_mem = &bo->mem; | |
ba4e7d97 TH |
53 | int ret; |
54 | ||
55 | if (old_mem->mem_type != TTM_PL_SYSTEM) { | |
3e98d829 | 56 | ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu); |
7b8082bc MD |
57 | |
58 | if (unlikely(ret != 0)) { | |
59 | if (ret != -ERESTARTSYS) | |
60 | pr_err("Failed to expire sync object before unbinding TTM\n"); | |
61 | return ret; | |
62 | } | |
63 | ||
2ff2bf1e | 64 | ttm_tt_unbind(ttm); |
ba4e7d97 TH |
65 | ttm_bo_free_old_node(bo); |
66 | ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM, | |
67 | TTM_PL_MASK_MEM); | |
68 | old_mem->mem_type = TTM_PL_SYSTEM; | |
ba4e7d97 TH |
69 | } |
70 | ||
71 | ret = ttm_tt_set_placement_caching(ttm, new_mem->placement); | |
72 | if (unlikely(ret != 0)) | |
73 | return ret; | |
74 | ||
75 | if (new_mem->mem_type != TTM_PL_SYSTEM) { | |
993baf15 | 76 | ret = ttm_tt_bind(ttm, new_mem, ctx); |
ba4e7d97 TH |
77 | if (unlikely(ret != 0)) |
78 | return ret; | |
79 | } | |
80 | ||
81 | *old_mem = *new_mem; | |
82 | new_mem->mm_node = NULL; | |
110b20c3 | 83 | |
ba4e7d97 TH |
84 | return 0; |
85 | } | |
86 | EXPORT_SYMBOL(ttm_bo_move_ttm); | |
87 | ||
eba67093 | 88 | int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible) |
82c5da6b | 89 | { |
eba67093 TH |
90 | if (likely(man->io_reserve_fastpath)) |
91 | return 0; | |
92 | ||
93 | if (interruptible) | |
94 | return mutex_lock_interruptible(&man->io_reserve_mutex); | |
95 | ||
96 | mutex_lock(&man->io_reserve_mutex); | |
97 | return 0; | |
98 | } | |
afe6804c | 99 | EXPORT_SYMBOL(ttm_mem_io_lock); |
82c5da6b | 100 | |
eba67093 TH |
101 | void ttm_mem_io_unlock(struct ttm_mem_type_manager *man) |
102 | { | |
103 | if (likely(man->io_reserve_fastpath)) | |
104 | return; | |
105 | ||
106 | mutex_unlock(&man->io_reserve_mutex); | |
107 | } | |
afe6804c | 108 | EXPORT_SYMBOL(ttm_mem_io_unlock); |
eba67093 TH |
109 | |
110 | static int ttm_mem_io_evict(struct ttm_mem_type_manager *man) | |
111 | { | |
112 | struct ttm_buffer_object *bo; | |
113 | ||
114 | if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru)) | |
115 | return -EAGAIN; | |
116 | ||
117 | bo = list_first_entry(&man->io_reserve_lru, | |
118 | struct ttm_buffer_object, | |
119 | io_reserve_lru); | |
120 | list_del_init(&bo->io_reserve_lru); | |
121 | ttm_bo_unmap_virtual_locked(bo); | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
afe6804c DA |
126 | |
127 | int ttm_mem_io_reserve(struct ttm_bo_device *bdev, | |
128 | struct ttm_mem_reg *mem) | |
eba67093 TH |
129 | { |
130 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
131 | int ret = 0; | |
132 | ||
133 | if (!bdev->driver->io_mem_reserve) | |
134 | return 0; | |
135 | if (likely(man->io_reserve_fastpath)) | |
136 | return bdev->driver->io_mem_reserve(bdev, mem); | |
137 | ||
138 | if (bdev->driver->io_mem_reserve && | |
139 | mem->bus.io_reserved_count++ == 0) { | |
140 | retry: | |
0c321c79 | 141 | ret = bdev->driver->io_mem_reserve(bdev, mem); |
eba67093 TH |
142 | if (ret == -EAGAIN) { |
143 | ret = ttm_mem_io_evict(man); | |
144 | if (ret == 0) | |
145 | goto retry; | |
146 | } | |
147 | } | |
148 | return ret; | |
149 | } | |
afe6804c | 150 | EXPORT_SYMBOL(ttm_mem_io_reserve); |
eba67093 | 151 | |
afe6804c DA |
152 | void ttm_mem_io_free(struct ttm_bo_device *bdev, |
153 | struct ttm_mem_reg *mem) | |
eba67093 TH |
154 | { |
155 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
156 | ||
157 | if (likely(man->io_reserve_fastpath)) | |
158 | return; | |
159 | ||
160 | if (bdev->driver->io_mem_reserve && | |
161 | --mem->bus.io_reserved_count == 0 && | |
162 | bdev->driver->io_mem_free) | |
163 | bdev->driver->io_mem_free(bdev, mem); | |
164 | ||
165 | } | |
afe6804c | 166 | EXPORT_SYMBOL(ttm_mem_io_free); |
eba67093 TH |
167 | |
168 | int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo) | |
169 | { | |
170 | struct ttm_mem_reg *mem = &bo->mem; | |
171 | int ret; | |
172 | ||
173 | if (!mem->bus.io_reserved_vm) { | |
174 | struct ttm_mem_type_manager *man = | |
175 | &bo->bdev->man[mem->mem_type]; | |
176 | ||
177 | ret = ttm_mem_io_reserve(bo->bdev, mem); | |
82c5da6b JG |
178 | if (unlikely(ret != 0)) |
179 | return ret; | |
eba67093 TH |
180 | mem->bus.io_reserved_vm = true; |
181 | if (man->use_io_reserve_lru) | |
182 | list_add_tail(&bo->io_reserve_lru, | |
183 | &man->io_reserve_lru); | |
82c5da6b JG |
184 | } |
185 | return 0; | |
186 | } | |
187 | ||
eba67093 | 188 | void ttm_mem_io_free_vm(struct ttm_buffer_object *bo) |
82c5da6b | 189 | { |
eba67093 TH |
190 | struct ttm_mem_reg *mem = &bo->mem; |
191 | ||
192 | if (mem->bus.io_reserved_vm) { | |
193 | mem->bus.io_reserved_vm = false; | |
194 | list_del_init(&bo->io_reserve_lru); | |
195 | ttm_mem_io_free(bo->bdev, mem); | |
82c5da6b JG |
196 | } |
197 | } | |
198 | ||
dcbff15a | 199 | static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, |
ba4e7d97 TH |
200 | void **virtual) |
201 | { | |
eba67093 | 202 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; |
ba4e7d97 TH |
203 | int ret; |
204 | void *addr; | |
205 | ||
206 | *virtual = NULL; | |
eba67093 | 207 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 208 | ret = ttm_mem_io_reserve(bdev, mem); |
eba67093 | 209 | ttm_mem_io_unlock(man); |
9e51159c | 210 | if (ret || !mem->bus.is_iomem) |
ba4e7d97 TH |
211 | return ret; |
212 | ||
82c5da6b JG |
213 | if (mem->bus.addr) { |
214 | addr = mem->bus.addr; | |
215 | } else { | |
ba4e7d97 | 216 | if (mem->placement & TTM_PL_FLAG_WC) |
82c5da6b | 217 | addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size); |
ba4e7d97 | 218 | else |
82c5da6b JG |
219 | addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size); |
220 | if (!addr) { | |
eba67093 | 221 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 222 | ttm_mem_io_free(bdev, mem); |
eba67093 | 223 | ttm_mem_io_unlock(man); |
ba4e7d97 | 224 | return -ENOMEM; |
82c5da6b | 225 | } |
ba4e7d97 TH |
226 | } |
227 | *virtual = addr; | |
228 | return 0; | |
229 | } | |
230 | ||
dcbff15a | 231 | static void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, |
ba4e7d97 TH |
232 | void *virtual) |
233 | { | |
234 | struct ttm_mem_type_manager *man; | |
235 | ||
236 | man = &bdev->man[mem->mem_type]; | |
237 | ||
0c321c79 | 238 | if (virtual && mem->bus.addr == NULL) |
ba4e7d97 | 239 | iounmap(virtual); |
eba67093 | 240 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 241 | ttm_mem_io_free(bdev, mem); |
eba67093 | 242 | ttm_mem_io_unlock(man); |
ba4e7d97 TH |
243 | } |
244 | ||
245 | static int ttm_copy_io_page(void *dst, void *src, unsigned long page) | |
246 | { | |
247 | uint32_t *dstP = | |
248 | (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT)); | |
249 | uint32_t *srcP = | |
250 | (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT)); | |
251 | ||
252 | int i; | |
253 | for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i) | |
254 | iowrite32(ioread32(srcP++), dstP++); | |
255 | return 0; | |
256 | } | |
257 | ||
403c1826 TH |
258 | #ifdef CONFIG_X86 |
259 | #define __ttm_kmap_atomic_prot(__page, __prot) kmap_atomic_prot(__page, __prot) | |
260 | #define __ttm_kunmap_atomic(__addr) kunmap_atomic(__addr) | |
261 | #else | |
262 | #define __ttm_kmap_atomic_prot(__page, __prot) vmap(&__page, 1, 0, __prot) | |
263 | #define __ttm_kunmap_atomic(__addr) vunmap(__addr) | |
264 | #endif | |
265 | ||
9c11fcf1 TH |
266 | |
267 | /** | |
268 | * ttm_kmap_atomic_prot - Efficient kernel map of a single page with | |
269 | * specified page protection. | |
270 | * | |
271 | * @page: The page to map. | |
272 | * @prot: The page protection. | |
273 | * | |
274 | * This function maps a TTM page using the kmap_atomic api if available, | |
275 | * otherwise falls back to vmap. The user must make sure that the | |
276 | * specified page does not have an aliased mapping with a different caching | |
277 | * policy unless the architecture explicitly allows it. Also mapping and | |
278 | * unmapping using this api must be correctly nested. Unmapping should | |
279 | * occur in the reverse order of mapping. | |
280 | */ | |
281 | void *ttm_kmap_atomic_prot(struct page *page, pgprot_t prot) | |
403c1826 TH |
282 | { |
283 | if (pgprot_val(prot) == pgprot_val(PAGE_KERNEL)) | |
284 | return kmap_atomic(page); | |
285 | else | |
286 | return __ttm_kmap_atomic_prot(page, prot); | |
287 | } | |
9c11fcf1 | 288 | EXPORT_SYMBOL(ttm_kmap_atomic_prot); |
403c1826 | 289 | |
9c11fcf1 TH |
290 | /** |
291 | * ttm_kunmap_atomic_prot - Unmap a page that was mapped using | |
292 | * ttm_kmap_atomic_prot. | |
293 | * | |
294 | * @addr: The virtual address from the map. | |
295 | * @prot: The page protection. | |
296 | */ | |
297 | void ttm_kunmap_atomic_prot(void *addr, pgprot_t prot) | |
403c1826 TH |
298 | { |
299 | if (pgprot_val(prot) == pgprot_val(PAGE_KERNEL)) | |
300 | kunmap_atomic(addr); | |
301 | else | |
302 | __ttm_kunmap_atomic(addr); | |
303 | } | |
9c11fcf1 | 304 | EXPORT_SYMBOL(ttm_kunmap_atomic_prot); |
403c1826 | 305 | |
ba4e7d97 | 306 | static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src, |
542c6f6d TH |
307 | unsigned long page, |
308 | pgprot_t prot) | |
ba4e7d97 | 309 | { |
b1e5f172 | 310 | struct page *d = ttm->pages[page]; |
ba4e7d97 TH |
311 | void *dst; |
312 | ||
313 | if (!d) | |
314 | return -ENOMEM; | |
315 | ||
316 | src = (void *)((unsigned long)src + (page << PAGE_SHIFT)); | |
403c1826 | 317 | dst = ttm_kmap_atomic_prot(d, prot); |
ba4e7d97 TH |
318 | if (!dst) |
319 | return -ENOMEM; | |
320 | ||
321 | memcpy_fromio(dst, src, PAGE_SIZE); | |
542c6f6d | 322 | |
403c1826 | 323 | ttm_kunmap_atomic_prot(dst, prot); |
542c6f6d | 324 | |
ba4e7d97 TH |
325 | return 0; |
326 | } | |
327 | ||
328 | static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst, | |
542c6f6d TH |
329 | unsigned long page, |
330 | pgprot_t prot) | |
ba4e7d97 | 331 | { |
b1e5f172 | 332 | struct page *s = ttm->pages[page]; |
ba4e7d97 TH |
333 | void *src; |
334 | ||
335 | if (!s) | |
336 | return -ENOMEM; | |
337 | ||
338 | dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT)); | |
403c1826 | 339 | src = ttm_kmap_atomic_prot(s, prot); |
ba4e7d97 TH |
340 | if (!src) |
341 | return -ENOMEM; | |
342 | ||
343 | memcpy_toio(dst, src, PAGE_SIZE); | |
542c6f6d | 344 | |
403c1826 | 345 | ttm_kunmap_atomic_prot(src, prot); |
542c6f6d | 346 | |
ba4e7d97 TH |
347 | return 0; |
348 | } | |
349 | ||
350 | int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, | |
3e98d829 | 351 | struct ttm_operation_ctx *ctx, |
9d87fa21 | 352 | struct ttm_mem_reg *new_mem) |
ba4e7d97 TH |
353 | { |
354 | struct ttm_bo_device *bdev = bo->bdev; | |
355 | struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; | |
356 | struct ttm_tt *ttm = bo->ttm; | |
357 | struct ttm_mem_reg *old_mem = &bo->mem; | |
e22469ca | 358 | struct ttm_mem_reg old_copy = *old_mem; |
ba4e7d97 TH |
359 | void *old_iomap; |
360 | void *new_iomap; | |
361 | int ret; | |
ba4e7d97 TH |
362 | unsigned long i; |
363 | unsigned long page; | |
364 | unsigned long add = 0; | |
365 | int dir; | |
366 | ||
3e98d829 | 367 | ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu); |
77dfc28b CK |
368 | if (ret) |
369 | return ret; | |
370 | ||
ba4e7d97 TH |
371 | ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap); |
372 | if (ret) | |
373 | return ret; | |
374 | ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap); | |
375 | if (ret) | |
376 | goto out; | |
377 | ||
da95c788 TH |
378 | /* |
379 | * Single TTM move. NOP. | |
380 | */ | |
ba4e7d97 TH |
381 | if (old_iomap == NULL && new_iomap == NULL) |
382 | goto out2; | |
da95c788 TH |
383 | |
384 | /* | |
0bc25425 | 385 | * Don't move nonexistent data. Clear destination instead. |
da95c788 | 386 | */ |
0bc25425 | 387 | if (old_iomap == NULL && |
2e6d8b46 TH |
388 | (ttm == NULL || (ttm->state == tt_unpopulated && |
389 | !(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) { | |
0bc25425 | 390 | memset_io(new_iomap, 0, new_mem->num_pages*PAGE_SIZE); |
ba4e7d97 | 391 | goto out2; |
0bc25425 | 392 | } |
ba4e7d97 | 393 | |
da95c788 TH |
394 | /* |
395 | * TTM might be null for moves within the same region. | |
9a0599dd | 396 | */ |
25893a14 CK |
397 | if (ttm) { |
398 | ret = ttm_tt_populate(ttm, ctx); | |
da95c788 | 399 | if (ret) |
b1e5f172 JG |
400 | goto out1; |
401 | } | |
402 | ||
ba4e7d97 TH |
403 | add = 0; |
404 | dir = 1; | |
405 | ||
406 | if ((old_mem->mem_type == new_mem->mem_type) && | |
d961db75 | 407 | (new_mem->start < old_mem->start + old_mem->size)) { |
ba4e7d97 TH |
408 | dir = -1; |
409 | add = new_mem->num_pages - 1; | |
410 | } | |
411 | ||
412 | for (i = 0; i < new_mem->num_pages; ++i) { | |
413 | page = i * dir + add; | |
542c6f6d TH |
414 | if (old_iomap == NULL) { |
415 | pgprot_t prot = ttm_io_prot(old_mem->placement, | |
416 | PAGE_KERNEL); | |
417 | ret = ttm_copy_ttm_io_page(ttm, new_iomap, page, | |
418 | prot); | |
419 | } else if (new_iomap == NULL) { | |
420 | pgprot_t prot = ttm_io_prot(new_mem->placement, | |
421 | PAGE_KERNEL); | |
422 | ret = ttm_copy_io_ttm_page(ttm, old_iomap, page, | |
423 | prot); | |
449f797a | 424 | } else { |
ba4e7d97 | 425 | ret = ttm_copy_io_page(new_iomap, old_iomap, page); |
449f797a | 426 | } |
da95c788 | 427 | if (ret) |
ba4e7d97 TH |
428 | goto out1; |
429 | } | |
430 | mb(); | |
431 | out2: | |
eba67093 | 432 | old_copy = *old_mem; |
ba4e7d97 TH |
433 | *old_mem = *new_mem; |
434 | new_mem->mm_node = NULL; | |
ba4e7d97 | 435 | |
4279cb14 | 436 | if (man->flags & TTM_MEMTYPE_FLAG_FIXED) { |
ba4e7d97 TH |
437 | ttm_tt_destroy(ttm); |
438 | bo->ttm = NULL; | |
439 | } | |
440 | ||
441 | out1: | |
eba67093 | 442 | ttm_mem_reg_iounmap(bdev, old_mem, new_iomap); |
ba4e7d97 TH |
443 | out: |
444 | ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap); | |
da95c788 TH |
445 | |
446 | /* | |
447 | * On error, keep the mm node! | |
448 | */ | |
449 | if (!ret) | |
450 | ttm_bo_mem_put(bo, &old_copy); | |
ba4e7d97 TH |
451 | return ret; |
452 | } | |
453 | EXPORT_SYMBOL(ttm_bo_move_memcpy); | |
454 | ||
455 | static void ttm_transfered_destroy(struct ttm_buffer_object *bo) | |
456 | { | |
457 | kfree(bo); | |
458 | } | |
459 | ||
460 | /** | |
461 | * ttm_buffer_object_transfer | |
462 | * | |
463 | * @bo: A pointer to a struct ttm_buffer_object. | |
464 | * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, | |
465 | * holding the data of @bo with the old placement. | |
466 | * | |
467 | * This is a utility function that may be called after an accelerated move | |
468 | * has been scheduled. A new buffer object is created as a placeholder for | |
469 | * the old data while it's being copied. When that buffer object is idle, | |
470 | * it can be destroyed, releasing the space of the old placement. | |
471 | * Returns: | |
472 | * !0: Failure. | |
473 | */ | |
474 | ||
475 | static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, | |
476 | struct ttm_buffer_object **new_obj) | |
477 | { | |
478 | struct ttm_buffer_object *fbo; | |
5e338405 | 479 | int ret; |
ba4e7d97 | 480 | |
ff7c60c5 | 481 | fbo = kmalloc(sizeof(*fbo), GFP_KERNEL); |
ba4e7d97 TH |
482 | if (!fbo) |
483 | return -ENOMEM; | |
484 | ||
485 | *fbo = *bo; | |
486 | ||
487 | /** | |
488 | * Fix up members that we shouldn't copy directly: | |
489 | * TODO: Explicit member copy would probably be better here. | |
490 | */ | |
491 | ||
38392633 | 492 | atomic_inc(&bo->bdev->glob->bo_count); |
ba4e7d97 TH |
493 | INIT_LIST_HEAD(&fbo->ddestroy); |
494 | INIT_LIST_HEAD(&fbo->lru); | |
495 | INIT_LIST_HEAD(&fbo->swap); | |
eba67093 | 496 | INIT_LIST_HEAD(&fbo->io_reserve_lru); |
4d98e5ee | 497 | mutex_init(&fbo->wu_mutex); |
5bc73067 | 498 | fbo->moving = NULL; |
72525b3f | 499 | drm_vma_node_reset(&fbo->vma_node); |
0fbecd40 | 500 | atomic_set(&fbo->cpu_writers, 0); |
ba4e7d97 | 501 | |
ba4e7d97 TH |
502 | kref_init(&fbo->list_kref); |
503 | kref_init(&fbo->kref); | |
504 | fbo->destroy = &ttm_transfered_destroy; | |
57de4ba9 | 505 | fbo->acc_size = 0; |
5e338405 ML |
506 | fbo->resv = &fbo->ttm_resv; |
507 | reservation_object_init(fbo->resv); | |
2b7e35fb | 508 | ret = reservation_object_trylock(fbo->resv); |
5e338405 | 509 | WARN_ON(!ret); |
ba4e7d97 TH |
510 | |
511 | *new_obj = fbo; | |
512 | return 0; | |
513 | } | |
514 | ||
515 | pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp) | |
516 | { | |
94318d50 BH |
517 | /* Cached mappings need no adjustment */ |
518 | if (caching_flags & TTM_PL_FLAG_CACHED) | |
519 | return tmp; | |
520 | ||
ba4e7d97 TH |
521 | #if defined(__i386__) || defined(__x86_64__) |
522 | if (caching_flags & TTM_PL_FLAG_WC) | |
523 | tmp = pgprot_writecombine(tmp); | |
524 | else if (boot_cpu_data.x86 > 3) | |
525 | tmp = pgprot_noncached(tmp); | |
ba4e7d97 | 526 | #endif |
f135b978 AC |
527 | #if defined(__ia64__) || defined(__arm__) || defined(__aarch64__) || \ |
528 | defined(__powerpc__) | |
ba4e7d97 TH |
529 | if (caching_flags & TTM_PL_FLAG_WC) |
530 | tmp = pgprot_writecombine(tmp); | |
531 | else | |
532 | tmp = pgprot_noncached(tmp); | |
533 | #endif | |
04cf55e1 | 534 | #if defined(__sparc__) || defined(__mips__) |
94318d50 | 535 | tmp = pgprot_noncached(tmp); |
ba4e7d97 TH |
536 | #endif |
537 | return tmp; | |
538 | } | |
4bfd75cb | 539 | EXPORT_SYMBOL(ttm_io_prot); |
ba4e7d97 TH |
540 | |
541 | static int ttm_bo_ioremap(struct ttm_buffer_object *bo, | |
82c5da6b JG |
542 | unsigned long offset, |
543 | unsigned long size, | |
ba4e7d97 TH |
544 | struct ttm_bo_kmap_obj *map) |
545 | { | |
ba4e7d97 | 546 | struct ttm_mem_reg *mem = &bo->mem; |
ba4e7d97 | 547 | |
82c5da6b | 548 | if (bo->mem.bus.addr) { |
ba4e7d97 | 549 | map->bo_kmap_type = ttm_bo_map_premapped; |
82c5da6b | 550 | map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset); |
ba4e7d97 TH |
551 | } else { |
552 | map->bo_kmap_type = ttm_bo_map_iomap; | |
553 | if (mem->placement & TTM_PL_FLAG_WC) | |
82c5da6b JG |
554 | map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset, |
555 | size); | |
ba4e7d97 | 556 | else |
82c5da6b JG |
557 | map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset, |
558 | size); | |
ba4e7d97 TH |
559 | } |
560 | return (!map->virtual) ? -ENOMEM : 0; | |
561 | } | |
562 | ||
563 | static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, | |
564 | unsigned long start_page, | |
565 | unsigned long num_pages, | |
566 | struct ttm_bo_kmap_obj *map) | |
567 | { | |
d0cef9fa RH |
568 | struct ttm_mem_reg *mem = &bo->mem; |
569 | struct ttm_operation_ctx ctx = { | |
570 | .interruptible = false, | |
571 | .no_wait_gpu = false | |
572 | }; | |
ba4e7d97 | 573 | struct ttm_tt *ttm = bo->ttm; |
d0cef9fa | 574 | pgprot_t prot; |
b1e5f172 | 575 | int ret; |
ba4e7d97 TH |
576 | |
577 | BUG_ON(!ttm); | |
b1e5f172 | 578 | |
25893a14 CK |
579 | ret = ttm_tt_populate(ttm, &ctx); |
580 | if (ret) | |
581 | return ret; | |
b1e5f172 | 582 | |
ba4e7d97 TH |
583 | if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) { |
584 | /* | |
585 | * We're mapping a single page, and the desired | |
586 | * page protection is consistent with the bo. | |
587 | */ | |
588 | ||
589 | map->bo_kmap_type = ttm_bo_map_kmap; | |
b1e5f172 | 590 | map->page = ttm->pages[start_page]; |
ba4e7d97 TH |
591 | map->virtual = kmap(map->page); |
592 | } else { | |
ba4e7d97 TH |
593 | /* |
594 | * We need to use vmap to get the desired page protection | |
af901ca1 | 595 | * or to make the buffer object look contiguous. |
ba4e7d97 | 596 | */ |
94318d50 | 597 | prot = ttm_io_prot(mem->placement, PAGE_KERNEL); |
ba4e7d97 TH |
598 | map->bo_kmap_type = ttm_bo_map_vmap; |
599 | map->virtual = vmap(ttm->pages + start_page, num_pages, | |
600 | 0, prot); | |
601 | } | |
602 | return (!map->virtual) ? -ENOMEM : 0; | |
603 | } | |
604 | ||
605 | int ttm_bo_kmap(struct ttm_buffer_object *bo, | |
606 | unsigned long start_page, unsigned long num_pages, | |
607 | struct ttm_bo_kmap_obj *map) | |
608 | { | |
eba67093 TH |
609 | struct ttm_mem_type_manager *man = |
610 | &bo->bdev->man[bo->mem.mem_type]; | |
82c5da6b | 611 | unsigned long offset, size; |
ba4e7d97 | 612 | int ret; |
ba4e7d97 | 613 | |
ba4e7d97 | 614 | map->virtual = NULL; |
82c5da6b | 615 | map->bo = bo; |
ba4e7d97 TH |
616 | if (num_pages > bo->num_pages) |
617 | return -EINVAL; | |
618 | if (start_page > bo->num_pages) | |
619 | return -EINVAL; | |
620 | #if 0 | |
4cda878b | 621 | if (num_pages > 1 && !capable(CAP_SYS_ADMIN)) |
ba4e7d97 TH |
622 | return -EPERM; |
623 | #endif | |
eba67093 | 624 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 625 | ret = ttm_mem_io_reserve(bo->bdev, &bo->mem); |
eba67093 | 626 | ttm_mem_io_unlock(man); |
ba4e7d97 TH |
627 | if (ret) |
628 | return ret; | |
82c5da6b | 629 | if (!bo->mem.bus.is_iomem) { |
ba4e7d97 TH |
630 | return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); |
631 | } else { | |
82c5da6b JG |
632 | offset = start_page << PAGE_SHIFT; |
633 | size = num_pages << PAGE_SHIFT; | |
634 | return ttm_bo_ioremap(bo, offset, size, map); | |
ba4e7d97 TH |
635 | } |
636 | } | |
637 | EXPORT_SYMBOL(ttm_bo_kmap); | |
638 | ||
639 | void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) | |
640 | { | |
eba67093 TH |
641 | struct ttm_buffer_object *bo = map->bo; |
642 | struct ttm_mem_type_manager *man = | |
643 | &bo->bdev->man[bo->mem.mem_type]; | |
644 | ||
ba4e7d97 TH |
645 | if (!map->virtual) |
646 | return; | |
647 | switch (map->bo_kmap_type) { | |
648 | case ttm_bo_map_iomap: | |
649 | iounmap(map->virtual); | |
650 | break; | |
651 | case ttm_bo_map_vmap: | |
652 | vunmap(map->virtual); | |
653 | break; | |
654 | case ttm_bo_map_kmap: | |
655 | kunmap(map->page); | |
656 | break; | |
657 | case ttm_bo_map_premapped: | |
658 | break; | |
659 | default: | |
660 | BUG(); | |
661 | } | |
eba67093 TH |
662 | (void) ttm_mem_io_lock(man, false); |
663 | ttm_mem_io_free(map->bo->bdev, &map->bo->mem); | |
664 | ttm_mem_io_unlock(man); | |
ba4e7d97 TH |
665 | map->virtual = NULL; |
666 | map->page = NULL; | |
667 | } | |
668 | EXPORT_SYMBOL(ttm_bo_kunmap); | |
669 | ||
ba4e7d97 | 670 | int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, |
f54d1867 | 671 | struct dma_fence *fence, |
97a875cb | 672 | bool evict, |
ba4e7d97 TH |
673 | struct ttm_mem_reg *new_mem) |
674 | { | |
675 | struct ttm_bo_device *bdev = bo->bdev; | |
ba4e7d97 TH |
676 | struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; |
677 | struct ttm_mem_reg *old_mem = &bo->mem; | |
678 | int ret; | |
ba4e7d97 | 679 | struct ttm_buffer_object *ghost_obj; |
ba4e7d97 | 680 | |
f2c24b83 | 681 | reservation_object_add_excl_fence(bo->resv, fence); |
ba4e7d97 | 682 | if (evict) { |
8aa6d4fc | 683 | ret = ttm_bo_wait(bo, false, false); |
ba4e7d97 TH |
684 | if (ret) |
685 | return ret; | |
686 | ||
4279cb14 | 687 | if (man->flags & TTM_MEMTYPE_FLAG_FIXED) { |
ba4e7d97 TH |
688 | ttm_tt_destroy(bo->ttm); |
689 | bo->ttm = NULL; | |
690 | } | |
eac20953 | 691 | ttm_bo_free_old_node(bo); |
ba4e7d97 TH |
692 | } else { |
693 | /** | |
694 | * This should help pipeline ordinary buffer moves. | |
695 | * | |
696 | * Hang old buffer memory on a new buffer object, | |
697 | * and leave it to be released when the GPU | |
698 | * operation has completed. | |
699 | */ | |
700 | ||
f54d1867 CW |
701 | dma_fence_put(bo->moving); |
702 | bo->moving = dma_fence_get(fence); | |
ba4e7d97 | 703 | |
ff7c60c5 | 704 | ret = ttm_buffer_object_transfer(bo, &ghost_obj); |
ba4e7d97 TH |
705 | if (ret) |
706 | return ret; | |
707 | ||
f2c24b83 ML |
708 | reservation_object_add_excl_fence(ghost_obj->resv, fence); |
709 | ||
ba4e7d97 TH |
710 | /** |
711 | * If we're not moving to fixed memory, the TTM object | |
712 | * needs to stay alive. Otherwhise hang it on the ghost | |
713 | * bo to be unbound and destroyed. | |
714 | */ | |
715 | ||
716 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
717 | ghost_obj->ttm = NULL; | |
718 | else | |
719 | bo->ttm = NULL; | |
720 | ||
721 | ttm_bo_unreserve(ghost_obj); | |
722 | ttm_bo_unref(&ghost_obj); | |
723 | } | |
724 | ||
725 | *old_mem = *new_mem; | |
726 | new_mem->mm_node = NULL; | |
110b20c3 | 727 | |
ba4e7d97 TH |
728 | return 0; |
729 | } | |
730 | EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); | |
3ddf4ad9 CK |
731 | |
732 | int ttm_bo_pipeline_move(struct ttm_buffer_object *bo, | |
f54d1867 | 733 | struct dma_fence *fence, bool evict, |
3ddf4ad9 CK |
734 | struct ttm_mem_reg *new_mem) |
735 | { | |
736 | struct ttm_bo_device *bdev = bo->bdev; | |
737 | struct ttm_mem_reg *old_mem = &bo->mem; | |
738 | ||
739 | struct ttm_mem_type_manager *from = &bdev->man[old_mem->mem_type]; | |
740 | struct ttm_mem_type_manager *to = &bdev->man[new_mem->mem_type]; | |
741 | ||
742 | int ret; | |
743 | ||
744 | reservation_object_add_excl_fence(bo->resv, fence); | |
745 | ||
746 | if (!evict) { | |
747 | struct ttm_buffer_object *ghost_obj; | |
748 | ||
749 | /** | |
750 | * This should help pipeline ordinary buffer moves. | |
751 | * | |
752 | * Hang old buffer memory on a new buffer object, | |
753 | * and leave it to be released when the GPU | |
754 | * operation has completed. | |
755 | */ | |
756 | ||
f54d1867 CW |
757 | dma_fence_put(bo->moving); |
758 | bo->moving = dma_fence_get(fence); | |
3ddf4ad9 CK |
759 | |
760 | ret = ttm_buffer_object_transfer(bo, &ghost_obj); | |
761 | if (ret) | |
762 | return ret; | |
763 | ||
764 | reservation_object_add_excl_fence(ghost_obj->resv, fence); | |
765 | ||
766 | /** | |
767 | * If we're not moving to fixed memory, the TTM object | |
768 | * needs to stay alive. Otherwhise hang it on the ghost | |
769 | * bo to be unbound and destroyed. | |
770 | */ | |
771 | ||
772 | if (!(to->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
773 | ghost_obj->ttm = NULL; | |
774 | else | |
775 | bo->ttm = NULL; | |
776 | ||
777 | ttm_bo_unreserve(ghost_obj); | |
778 | ttm_bo_unref(&ghost_obj); | |
779 | ||
780 | } else if (from->flags & TTM_MEMTYPE_FLAG_FIXED) { | |
781 | ||
782 | /** | |
783 | * BO doesn't have a TTM we need to bind/unbind. Just remember | |
784 | * this eviction and free up the allocation | |
785 | */ | |
786 | ||
787 | spin_lock(&from->move_lock); | |
f54d1867 CW |
788 | if (!from->move || dma_fence_is_later(fence, from->move)) { |
789 | dma_fence_put(from->move); | |
790 | from->move = dma_fence_get(fence); | |
3ddf4ad9 CK |
791 | } |
792 | spin_unlock(&from->move_lock); | |
793 | ||
794 | ttm_bo_free_old_node(bo); | |
795 | ||
f54d1867 CW |
796 | dma_fence_put(bo->moving); |
797 | bo->moving = dma_fence_get(fence); | |
3ddf4ad9 CK |
798 | |
799 | } else { | |
800 | /** | |
801 | * Last resort, wait for the move to be completed. | |
802 | * | |
803 | * Should never happen in pratice. | |
804 | */ | |
805 | ||
806 | ret = ttm_bo_wait(bo, false, false); | |
807 | if (ret) | |
808 | return ret; | |
809 | ||
810 | if (to->flags & TTM_MEMTYPE_FLAG_FIXED) { | |
811 | ttm_tt_destroy(bo->ttm); | |
812 | bo->ttm = NULL; | |
813 | } | |
814 | ttm_bo_free_old_node(bo); | |
815 | } | |
816 | ||
817 | *old_mem = *new_mem; | |
818 | new_mem->mm_node = NULL; | |
819 | ||
820 | return 0; | |
821 | } | |
822 | EXPORT_SYMBOL(ttm_bo_pipeline_move); | |
5d951098 CK |
823 | |
824 | int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo) | |
825 | { | |
826 | struct ttm_buffer_object *ghost; | |
827 | int ret; | |
828 | ||
829 | ret = ttm_buffer_object_transfer(bo, &ghost); | |
830 | if (ret) | |
831 | return ret; | |
832 | ||
833 | ret = reservation_object_copy_fences(ghost->resv, bo->resv); | |
834 | /* Last resort, wait for the BO to be idle when we are OOM */ | |
835 | if (ret) | |
836 | ttm_bo_wait(bo, false, false); | |
837 | ||
838 | memset(&bo->mem, 0, sizeof(bo->mem)); | |
839 | bo->mem.mem_type = TTM_PL_SYSTEM; | |
840 | bo->ttm = NULL; | |
841 | ||
842 | ttm_bo_unreserve(ghost); | |
843 | ttm_bo_unref(&ghost); | |
844 | ||
845 | return 0; | |
846 | } |