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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 | ||
258 | static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src, | |
542c6f6d TH |
259 | unsigned long page, |
260 | pgprot_t prot) | |
ba4e7d97 | 261 | { |
b1e5f172 | 262 | struct page *d = ttm->pages[page]; |
ba4e7d97 TH |
263 | void *dst; |
264 | ||
265 | if (!d) | |
266 | return -ENOMEM; | |
267 | ||
268 | src = (void *)((unsigned long)src + (page << PAGE_SHIFT)); | |
542c6f6d TH |
269 | |
270 | #ifdef CONFIG_X86 | |
3e4d3af5 | 271 | dst = kmap_atomic_prot(d, prot); |
542c6f6d | 272 | #else |
6d0897ba | 273 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
274 | dst = vmap(&d, 1, 0, prot); |
275 | else | |
276 | dst = kmap(d); | |
277 | #endif | |
ba4e7d97 TH |
278 | if (!dst) |
279 | return -ENOMEM; | |
280 | ||
281 | memcpy_fromio(dst, src, PAGE_SIZE); | |
542c6f6d TH |
282 | |
283 | #ifdef CONFIG_X86 | |
3e4d3af5 | 284 | kunmap_atomic(dst); |
542c6f6d | 285 | #else |
6d0897ba | 286 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
287 | vunmap(dst); |
288 | else | |
289 | kunmap(d); | |
290 | #endif | |
291 | ||
ba4e7d97 TH |
292 | return 0; |
293 | } | |
294 | ||
295 | static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst, | |
542c6f6d TH |
296 | unsigned long page, |
297 | pgprot_t prot) | |
ba4e7d97 | 298 | { |
b1e5f172 | 299 | struct page *s = ttm->pages[page]; |
ba4e7d97 TH |
300 | void *src; |
301 | ||
302 | if (!s) | |
303 | return -ENOMEM; | |
304 | ||
305 | dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT)); | |
542c6f6d | 306 | #ifdef CONFIG_X86 |
3e4d3af5 | 307 | src = kmap_atomic_prot(s, prot); |
542c6f6d | 308 | #else |
6d0897ba | 309 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
310 | src = vmap(&s, 1, 0, prot); |
311 | else | |
312 | src = kmap(s); | |
313 | #endif | |
ba4e7d97 TH |
314 | if (!src) |
315 | return -ENOMEM; | |
316 | ||
317 | memcpy_toio(dst, src, PAGE_SIZE); | |
542c6f6d TH |
318 | |
319 | #ifdef CONFIG_X86 | |
3e4d3af5 | 320 | kunmap_atomic(src); |
542c6f6d | 321 | #else |
6d0897ba | 322 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
323 | vunmap(src); |
324 | else | |
325 | kunmap(s); | |
326 | #endif | |
327 | ||
ba4e7d97 TH |
328 | return 0; |
329 | } | |
330 | ||
331 | int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, | |
3e98d829 | 332 | struct ttm_operation_ctx *ctx, |
9d87fa21 | 333 | struct ttm_mem_reg *new_mem) |
ba4e7d97 TH |
334 | { |
335 | struct ttm_bo_device *bdev = bo->bdev; | |
336 | struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; | |
337 | struct ttm_tt *ttm = bo->ttm; | |
338 | struct ttm_mem_reg *old_mem = &bo->mem; | |
e22469ca | 339 | struct ttm_mem_reg old_copy = *old_mem; |
ba4e7d97 TH |
340 | void *old_iomap; |
341 | void *new_iomap; | |
342 | int ret; | |
ba4e7d97 TH |
343 | unsigned long i; |
344 | unsigned long page; | |
345 | unsigned long add = 0; | |
346 | int dir; | |
347 | ||
3e98d829 | 348 | ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu); |
77dfc28b CK |
349 | if (ret) |
350 | return ret; | |
351 | ||
ba4e7d97 TH |
352 | ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap); |
353 | if (ret) | |
354 | return ret; | |
355 | ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap); | |
356 | if (ret) | |
357 | goto out; | |
358 | ||
da95c788 TH |
359 | /* |
360 | * Single TTM move. NOP. | |
361 | */ | |
ba4e7d97 TH |
362 | if (old_iomap == NULL && new_iomap == NULL) |
363 | goto out2; | |
da95c788 TH |
364 | |
365 | /* | |
0bc25425 | 366 | * Don't move nonexistent data. Clear destination instead. |
da95c788 | 367 | */ |
0bc25425 | 368 | if (old_iomap == NULL && |
2e6d8b46 TH |
369 | (ttm == NULL || (ttm->state == tt_unpopulated && |
370 | !(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) { | |
0bc25425 | 371 | memset_io(new_iomap, 0, new_mem->num_pages*PAGE_SIZE); |
ba4e7d97 | 372 | goto out2; |
0bc25425 | 373 | } |
ba4e7d97 | 374 | |
da95c788 TH |
375 | /* |
376 | * TTM might be null for moves within the same region. | |
9a0599dd JB |
377 | */ |
378 | if (ttm && ttm->state == tt_unpopulated) { | |
d0cef9fa | 379 | ret = ttm->bdev->driver->ttm_tt_populate(ttm, ctx); |
da95c788 | 380 | if (ret) |
b1e5f172 JG |
381 | goto out1; |
382 | } | |
383 | ||
ba4e7d97 TH |
384 | add = 0; |
385 | dir = 1; | |
386 | ||
387 | if ((old_mem->mem_type == new_mem->mem_type) && | |
d961db75 | 388 | (new_mem->start < old_mem->start + old_mem->size)) { |
ba4e7d97 TH |
389 | dir = -1; |
390 | add = new_mem->num_pages - 1; | |
391 | } | |
392 | ||
393 | for (i = 0; i < new_mem->num_pages; ++i) { | |
394 | page = i * dir + add; | |
542c6f6d TH |
395 | if (old_iomap == NULL) { |
396 | pgprot_t prot = ttm_io_prot(old_mem->placement, | |
397 | PAGE_KERNEL); | |
398 | ret = ttm_copy_ttm_io_page(ttm, new_iomap, page, | |
399 | prot); | |
400 | } else if (new_iomap == NULL) { | |
401 | pgprot_t prot = ttm_io_prot(new_mem->placement, | |
402 | PAGE_KERNEL); | |
403 | ret = ttm_copy_io_ttm_page(ttm, old_iomap, page, | |
404 | prot); | |
449f797a | 405 | } else { |
ba4e7d97 | 406 | ret = ttm_copy_io_page(new_iomap, old_iomap, page); |
449f797a | 407 | } |
da95c788 | 408 | if (ret) |
ba4e7d97 TH |
409 | goto out1; |
410 | } | |
411 | mb(); | |
412 | out2: | |
eba67093 | 413 | old_copy = *old_mem; |
ba4e7d97 TH |
414 | *old_mem = *new_mem; |
415 | new_mem->mm_node = NULL; | |
ba4e7d97 | 416 | |
4279cb14 | 417 | if (man->flags & TTM_MEMTYPE_FLAG_FIXED) { |
ba4e7d97 TH |
418 | ttm_tt_destroy(ttm); |
419 | bo->ttm = NULL; | |
420 | } | |
421 | ||
422 | out1: | |
eba67093 | 423 | ttm_mem_reg_iounmap(bdev, old_mem, new_iomap); |
ba4e7d97 TH |
424 | out: |
425 | ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap); | |
da95c788 TH |
426 | |
427 | /* | |
428 | * On error, keep the mm node! | |
429 | */ | |
430 | if (!ret) | |
431 | ttm_bo_mem_put(bo, &old_copy); | |
ba4e7d97 TH |
432 | return ret; |
433 | } | |
434 | EXPORT_SYMBOL(ttm_bo_move_memcpy); | |
435 | ||
436 | static void ttm_transfered_destroy(struct ttm_buffer_object *bo) | |
437 | { | |
438 | kfree(bo); | |
439 | } | |
440 | ||
441 | /** | |
442 | * ttm_buffer_object_transfer | |
443 | * | |
444 | * @bo: A pointer to a struct ttm_buffer_object. | |
445 | * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, | |
446 | * holding the data of @bo with the old placement. | |
447 | * | |
448 | * This is a utility function that may be called after an accelerated move | |
449 | * has been scheduled. A new buffer object is created as a placeholder for | |
450 | * the old data while it's being copied. When that buffer object is idle, | |
451 | * it can be destroyed, releasing the space of the old placement. | |
452 | * Returns: | |
453 | * !0: Failure. | |
454 | */ | |
455 | ||
456 | static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, | |
457 | struct ttm_buffer_object **new_obj) | |
458 | { | |
459 | struct ttm_buffer_object *fbo; | |
5e338405 | 460 | int ret; |
ba4e7d97 | 461 | |
ff7c60c5 | 462 | fbo = kmalloc(sizeof(*fbo), GFP_KERNEL); |
ba4e7d97 TH |
463 | if (!fbo) |
464 | return -ENOMEM; | |
465 | ||
466 | *fbo = *bo; | |
467 | ||
468 | /** | |
469 | * Fix up members that we shouldn't copy directly: | |
470 | * TODO: Explicit member copy would probably be better here. | |
471 | */ | |
472 | ||
7e96a135 | 473 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 TH |
474 | INIT_LIST_HEAD(&fbo->ddestroy); |
475 | INIT_LIST_HEAD(&fbo->lru); | |
476 | INIT_LIST_HEAD(&fbo->swap); | |
eba67093 | 477 | INIT_LIST_HEAD(&fbo->io_reserve_lru); |
4d98e5ee | 478 | mutex_init(&fbo->wu_mutex); |
5bc73067 | 479 | fbo->moving = NULL; |
72525b3f | 480 | drm_vma_node_reset(&fbo->vma_node); |
0fbecd40 | 481 | atomic_set(&fbo->cpu_writers, 0); |
ba4e7d97 | 482 | |
ba4e7d97 TH |
483 | kref_init(&fbo->list_kref); |
484 | kref_init(&fbo->kref); | |
485 | fbo->destroy = &ttm_transfered_destroy; | |
57de4ba9 | 486 | fbo->acc_size = 0; |
5e338405 ML |
487 | fbo->resv = &fbo->ttm_resv; |
488 | reservation_object_init(fbo->resv); | |
2b7e35fb | 489 | ret = reservation_object_trylock(fbo->resv); |
5e338405 | 490 | WARN_ON(!ret); |
ba4e7d97 TH |
491 | |
492 | *new_obj = fbo; | |
493 | return 0; | |
494 | } | |
495 | ||
496 | pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp) | |
497 | { | |
94318d50 BH |
498 | /* Cached mappings need no adjustment */ |
499 | if (caching_flags & TTM_PL_FLAG_CACHED) | |
500 | return tmp; | |
501 | ||
ba4e7d97 TH |
502 | #if defined(__i386__) || defined(__x86_64__) |
503 | if (caching_flags & TTM_PL_FLAG_WC) | |
504 | tmp = pgprot_writecombine(tmp); | |
505 | else if (boot_cpu_data.x86 > 3) | |
506 | tmp = pgprot_noncached(tmp); | |
ba4e7d97 | 507 | #endif |
f135b978 AC |
508 | #if defined(__ia64__) || defined(__arm__) || defined(__aarch64__) || \ |
509 | defined(__powerpc__) | |
ba4e7d97 TH |
510 | if (caching_flags & TTM_PL_FLAG_WC) |
511 | tmp = pgprot_writecombine(tmp); | |
512 | else | |
513 | tmp = pgprot_noncached(tmp); | |
514 | #endif | |
04cf55e1 | 515 | #if defined(__sparc__) || defined(__mips__) |
94318d50 | 516 | tmp = pgprot_noncached(tmp); |
ba4e7d97 TH |
517 | #endif |
518 | return tmp; | |
519 | } | |
4bfd75cb | 520 | EXPORT_SYMBOL(ttm_io_prot); |
ba4e7d97 TH |
521 | |
522 | static int ttm_bo_ioremap(struct ttm_buffer_object *bo, | |
82c5da6b JG |
523 | unsigned long offset, |
524 | unsigned long size, | |
ba4e7d97 TH |
525 | struct ttm_bo_kmap_obj *map) |
526 | { | |
ba4e7d97 | 527 | struct ttm_mem_reg *mem = &bo->mem; |
ba4e7d97 | 528 | |
82c5da6b | 529 | if (bo->mem.bus.addr) { |
ba4e7d97 | 530 | map->bo_kmap_type = ttm_bo_map_premapped; |
82c5da6b | 531 | map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset); |
ba4e7d97 TH |
532 | } else { |
533 | map->bo_kmap_type = ttm_bo_map_iomap; | |
534 | if (mem->placement & TTM_PL_FLAG_WC) | |
82c5da6b JG |
535 | map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset, |
536 | size); | |
ba4e7d97 | 537 | else |
82c5da6b JG |
538 | map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset, |
539 | size); | |
ba4e7d97 TH |
540 | } |
541 | return (!map->virtual) ? -ENOMEM : 0; | |
542 | } | |
543 | ||
544 | static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, | |
545 | unsigned long start_page, | |
546 | unsigned long num_pages, | |
547 | struct ttm_bo_kmap_obj *map) | |
548 | { | |
d0cef9fa RH |
549 | struct ttm_mem_reg *mem = &bo->mem; |
550 | struct ttm_operation_ctx ctx = { | |
551 | .interruptible = false, | |
552 | .no_wait_gpu = false | |
553 | }; | |
ba4e7d97 | 554 | struct ttm_tt *ttm = bo->ttm; |
d0cef9fa | 555 | pgprot_t prot; |
b1e5f172 | 556 | int ret; |
ba4e7d97 TH |
557 | |
558 | BUG_ON(!ttm); | |
b1e5f172 JG |
559 | |
560 | if (ttm->state == tt_unpopulated) { | |
d0cef9fa | 561 | ret = ttm->bdev->driver->ttm_tt_populate(ttm, &ctx); |
b1e5f172 JG |
562 | if (ret) |
563 | return ret; | |
564 | } | |
565 | ||
ba4e7d97 TH |
566 | if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) { |
567 | /* | |
568 | * We're mapping a single page, and the desired | |
569 | * page protection is consistent with the bo. | |
570 | */ | |
571 | ||
572 | map->bo_kmap_type = ttm_bo_map_kmap; | |
b1e5f172 | 573 | map->page = ttm->pages[start_page]; |
ba4e7d97 TH |
574 | map->virtual = kmap(map->page); |
575 | } else { | |
ba4e7d97 TH |
576 | /* |
577 | * We need to use vmap to get the desired page protection | |
af901ca1 | 578 | * or to make the buffer object look contiguous. |
ba4e7d97 | 579 | */ |
94318d50 | 580 | prot = ttm_io_prot(mem->placement, PAGE_KERNEL); |
ba4e7d97 TH |
581 | map->bo_kmap_type = ttm_bo_map_vmap; |
582 | map->virtual = vmap(ttm->pages + start_page, num_pages, | |
583 | 0, prot); | |
584 | } | |
585 | return (!map->virtual) ? -ENOMEM : 0; | |
586 | } | |
587 | ||
588 | int ttm_bo_kmap(struct ttm_buffer_object *bo, | |
589 | unsigned long start_page, unsigned long num_pages, | |
590 | struct ttm_bo_kmap_obj *map) | |
591 | { | |
eba67093 TH |
592 | struct ttm_mem_type_manager *man = |
593 | &bo->bdev->man[bo->mem.mem_type]; | |
82c5da6b | 594 | unsigned long offset, size; |
ba4e7d97 | 595 | int ret; |
ba4e7d97 | 596 | |
ba4e7d97 | 597 | map->virtual = NULL; |
82c5da6b | 598 | map->bo = bo; |
ba4e7d97 TH |
599 | if (num_pages > bo->num_pages) |
600 | return -EINVAL; | |
601 | if (start_page > bo->num_pages) | |
602 | return -EINVAL; | |
603 | #if 0 | |
4cda878b | 604 | if (num_pages > 1 && !capable(CAP_SYS_ADMIN)) |
ba4e7d97 TH |
605 | return -EPERM; |
606 | #endif | |
eba67093 | 607 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 608 | ret = ttm_mem_io_reserve(bo->bdev, &bo->mem); |
eba67093 | 609 | ttm_mem_io_unlock(man); |
ba4e7d97 TH |
610 | if (ret) |
611 | return ret; | |
82c5da6b | 612 | if (!bo->mem.bus.is_iomem) { |
ba4e7d97 TH |
613 | return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); |
614 | } else { | |
82c5da6b JG |
615 | offset = start_page << PAGE_SHIFT; |
616 | size = num_pages << PAGE_SHIFT; | |
617 | return ttm_bo_ioremap(bo, offset, size, map); | |
ba4e7d97 TH |
618 | } |
619 | } | |
620 | EXPORT_SYMBOL(ttm_bo_kmap); | |
621 | ||
622 | void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) | |
623 | { | |
eba67093 TH |
624 | struct ttm_buffer_object *bo = map->bo; |
625 | struct ttm_mem_type_manager *man = | |
626 | &bo->bdev->man[bo->mem.mem_type]; | |
627 | ||
ba4e7d97 TH |
628 | if (!map->virtual) |
629 | return; | |
630 | switch (map->bo_kmap_type) { | |
631 | case ttm_bo_map_iomap: | |
632 | iounmap(map->virtual); | |
633 | break; | |
634 | case ttm_bo_map_vmap: | |
635 | vunmap(map->virtual); | |
636 | break; | |
637 | case ttm_bo_map_kmap: | |
638 | kunmap(map->page); | |
639 | break; | |
640 | case ttm_bo_map_premapped: | |
641 | break; | |
642 | default: | |
643 | BUG(); | |
644 | } | |
eba67093 TH |
645 | (void) ttm_mem_io_lock(man, false); |
646 | ttm_mem_io_free(map->bo->bdev, &map->bo->mem); | |
647 | ttm_mem_io_unlock(man); | |
ba4e7d97 TH |
648 | map->virtual = NULL; |
649 | map->page = NULL; | |
650 | } | |
651 | EXPORT_SYMBOL(ttm_bo_kunmap); | |
652 | ||
ba4e7d97 | 653 | int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, |
f54d1867 | 654 | struct dma_fence *fence, |
97a875cb | 655 | bool evict, |
ba4e7d97 TH |
656 | struct ttm_mem_reg *new_mem) |
657 | { | |
658 | struct ttm_bo_device *bdev = bo->bdev; | |
ba4e7d97 TH |
659 | struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; |
660 | struct ttm_mem_reg *old_mem = &bo->mem; | |
661 | int ret; | |
ba4e7d97 | 662 | struct ttm_buffer_object *ghost_obj; |
ba4e7d97 | 663 | |
f2c24b83 | 664 | reservation_object_add_excl_fence(bo->resv, fence); |
ba4e7d97 | 665 | if (evict) { |
8aa6d4fc | 666 | ret = ttm_bo_wait(bo, false, false); |
ba4e7d97 TH |
667 | if (ret) |
668 | return ret; | |
669 | ||
4279cb14 | 670 | if (man->flags & TTM_MEMTYPE_FLAG_FIXED) { |
ba4e7d97 TH |
671 | ttm_tt_destroy(bo->ttm); |
672 | bo->ttm = NULL; | |
673 | } | |
eac20953 | 674 | ttm_bo_free_old_node(bo); |
ba4e7d97 TH |
675 | } else { |
676 | /** | |
677 | * This should help pipeline ordinary buffer moves. | |
678 | * | |
679 | * Hang old buffer memory on a new buffer object, | |
680 | * and leave it to be released when the GPU | |
681 | * operation has completed. | |
682 | */ | |
683 | ||
f54d1867 CW |
684 | dma_fence_put(bo->moving); |
685 | bo->moving = dma_fence_get(fence); | |
ba4e7d97 | 686 | |
ff7c60c5 | 687 | ret = ttm_buffer_object_transfer(bo, &ghost_obj); |
ba4e7d97 TH |
688 | if (ret) |
689 | return ret; | |
690 | ||
f2c24b83 ML |
691 | reservation_object_add_excl_fence(ghost_obj->resv, fence); |
692 | ||
ba4e7d97 TH |
693 | /** |
694 | * If we're not moving to fixed memory, the TTM object | |
695 | * needs to stay alive. Otherwhise hang it on the ghost | |
696 | * bo to be unbound and destroyed. | |
697 | */ | |
698 | ||
699 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
700 | ghost_obj->ttm = NULL; | |
701 | else | |
702 | bo->ttm = NULL; | |
703 | ||
704 | ttm_bo_unreserve(ghost_obj); | |
705 | ttm_bo_unref(&ghost_obj); | |
706 | } | |
707 | ||
708 | *old_mem = *new_mem; | |
709 | new_mem->mm_node = NULL; | |
110b20c3 | 710 | |
ba4e7d97 TH |
711 | return 0; |
712 | } | |
713 | EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); | |
3ddf4ad9 CK |
714 | |
715 | int ttm_bo_pipeline_move(struct ttm_buffer_object *bo, | |
f54d1867 | 716 | struct dma_fence *fence, bool evict, |
3ddf4ad9 CK |
717 | struct ttm_mem_reg *new_mem) |
718 | { | |
719 | struct ttm_bo_device *bdev = bo->bdev; | |
720 | struct ttm_mem_reg *old_mem = &bo->mem; | |
721 | ||
722 | struct ttm_mem_type_manager *from = &bdev->man[old_mem->mem_type]; | |
723 | struct ttm_mem_type_manager *to = &bdev->man[new_mem->mem_type]; | |
724 | ||
725 | int ret; | |
726 | ||
727 | reservation_object_add_excl_fence(bo->resv, fence); | |
728 | ||
729 | if (!evict) { | |
730 | struct ttm_buffer_object *ghost_obj; | |
731 | ||
732 | /** | |
733 | * This should help pipeline ordinary buffer moves. | |
734 | * | |
735 | * Hang old buffer memory on a new buffer object, | |
736 | * and leave it to be released when the GPU | |
737 | * operation has completed. | |
738 | */ | |
739 | ||
f54d1867 CW |
740 | dma_fence_put(bo->moving); |
741 | bo->moving = dma_fence_get(fence); | |
3ddf4ad9 CK |
742 | |
743 | ret = ttm_buffer_object_transfer(bo, &ghost_obj); | |
744 | if (ret) | |
745 | return ret; | |
746 | ||
747 | reservation_object_add_excl_fence(ghost_obj->resv, fence); | |
748 | ||
749 | /** | |
750 | * If we're not moving to fixed memory, the TTM object | |
751 | * needs to stay alive. Otherwhise hang it on the ghost | |
752 | * bo to be unbound and destroyed. | |
753 | */ | |
754 | ||
755 | if (!(to->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
756 | ghost_obj->ttm = NULL; | |
757 | else | |
758 | bo->ttm = NULL; | |
759 | ||
760 | ttm_bo_unreserve(ghost_obj); | |
761 | ttm_bo_unref(&ghost_obj); | |
762 | ||
763 | } else if (from->flags & TTM_MEMTYPE_FLAG_FIXED) { | |
764 | ||
765 | /** | |
766 | * BO doesn't have a TTM we need to bind/unbind. Just remember | |
767 | * this eviction and free up the allocation | |
768 | */ | |
769 | ||
770 | spin_lock(&from->move_lock); | |
f54d1867 CW |
771 | if (!from->move || dma_fence_is_later(fence, from->move)) { |
772 | dma_fence_put(from->move); | |
773 | from->move = dma_fence_get(fence); | |
3ddf4ad9 CK |
774 | } |
775 | spin_unlock(&from->move_lock); | |
776 | ||
777 | ttm_bo_free_old_node(bo); | |
778 | ||
f54d1867 CW |
779 | dma_fence_put(bo->moving); |
780 | bo->moving = dma_fence_get(fence); | |
3ddf4ad9 CK |
781 | |
782 | } else { | |
783 | /** | |
784 | * Last resort, wait for the move to be completed. | |
785 | * | |
786 | * Should never happen in pratice. | |
787 | */ | |
788 | ||
789 | ret = ttm_bo_wait(bo, false, false); | |
790 | if (ret) | |
791 | return ret; | |
792 | ||
793 | if (to->flags & TTM_MEMTYPE_FLAG_FIXED) { | |
794 | ttm_tt_destroy(bo->ttm); | |
795 | bo->ttm = NULL; | |
796 | } | |
797 | ttm_bo_free_old_node(bo); | |
798 | } | |
799 | ||
800 | *old_mem = *new_mem; | |
801 | new_mem->mm_node = NULL; | |
802 | ||
803 | return 0; | |
804 | } | |
805 | EXPORT_SYMBOL(ttm_bo_pipeline_move); |