1
2
3#include <drm/drm_gem_vram_helper.h>
4#include <drm/drm_device.h>
5#include <drm/drm_mode.h>
6#include <drm/drm_prime.h>
7#include <drm/drm_vram_mm_helper.h>
8#include <drm/ttm/ttm_page_alloc.h>
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20
21static void drm_gem_vram_cleanup(struct drm_gem_vram_object *gbo)
22{
23
24
25
26
27 drm_gem_object_release(&gbo->gem);
28}
29
30static void drm_gem_vram_destroy(struct drm_gem_vram_object *gbo)
31{
32 drm_gem_vram_cleanup(gbo);
33 kfree(gbo);
34}
35
36static void ttm_buffer_object_destroy(struct ttm_buffer_object *bo)
37{
38 struct drm_gem_vram_object *gbo = drm_gem_vram_of_bo(bo);
39
40 drm_gem_vram_destroy(gbo);
41}
42
43static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
44 unsigned long pl_flag)
45{
46 unsigned int i;
47 unsigned int c = 0;
48
49 gbo->placement.placement = gbo->placements;
50 gbo->placement.busy_placement = gbo->placements;
51
52 if (pl_flag & TTM_PL_FLAG_VRAM)
53 gbo->placements[c++].flags = TTM_PL_FLAG_WC |
54 TTM_PL_FLAG_UNCACHED |
55 TTM_PL_FLAG_VRAM;
56
57 if (pl_flag & TTM_PL_FLAG_SYSTEM)
58 gbo->placements[c++].flags = TTM_PL_MASK_CACHING |
59 TTM_PL_FLAG_SYSTEM;
60
61 if (!c)
62 gbo->placements[c++].flags = TTM_PL_MASK_CACHING |
63 TTM_PL_FLAG_SYSTEM;
64
65 gbo->placement.num_placement = c;
66 gbo->placement.num_busy_placement = c;
67
68 for (i = 0; i < c; ++i) {
69 gbo->placements[i].fpfn = 0;
70 gbo->placements[i].lpfn = 0;
71 }
72}
73
74static int drm_gem_vram_init(struct drm_device *dev,
75 struct ttm_bo_device *bdev,
76 struct drm_gem_vram_object *gbo,
77 size_t size, unsigned long pg_align,
78 bool interruptible)
79{
80 int ret;
81 size_t acc_size;
82
83 ret = drm_gem_object_init(dev, &gbo->gem, size);
84 if (ret)
85 return ret;
86
87 acc_size = ttm_bo_dma_acc_size(bdev, size, sizeof(*gbo));
88
89 gbo->bo.bdev = bdev;
90 drm_gem_vram_placement(gbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
91
92 ret = ttm_bo_init(bdev, &gbo->bo, size, ttm_bo_type_device,
93 &gbo->placement, pg_align, interruptible, acc_size,
94 NULL, NULL, ttm_buffer_object_destroy);
95 if (ret)
96 goto err_drm_gem_object_release;
97
98 return 0;
99
100err_drm_gem_object_release:
101 drm_gem_object_release(&gbo->gem);
102 return ret;
103}
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116
117struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
118 struct ttm_bo_device *bdev,
119 size_t size,
120 unsigned long pg_align,
121 bool interruptible)
122{
123 struct drm_gem_vram_object *gbo;
124 int ret;
125
126 gbo = kzalloc(sizeof(*gbo), GFP_KERNEL);
127 if (!gbo)
128 return ERR_PTR(-ENOMEM);
129
130 ret = drm_gem_vram_init(dev, bdev, gbo, size, pg_align, interruptible);
131 if (ret < 0)
132 goto err_kfree;
133
134 return gbo;
135
136err_kfree:
137 kfree(gbo);
138 return ERR_PTR(ret);
139}
140EXPORT_SYMBOL(drm_gem_vram_create);
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146
147
148void drm_gem_vram_put(struct drm_gem_vram_object *gbo)
149{
150 ttm_bo_put(&gbo->bo);
151}
152EXPORT_SYMBOL(drm_gem_vram_put);
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164u64 drm_gem_vram_mmap_offset(struct drm_gem_vram_object *gbo)
165{
166 return drm_vma_node_offset_addr(&gbo->bo.vma_node);
167}
168EXPORT_SYMBOL(drm_gem_vram_mmap_offset);
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182s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo)
183{
184 if (WARN_ON_ONCE(!gbo->pin_count))
185 return (s64)-ENODEV;
186 return gbo->bo.offset;
187}
188EXPORT_SYMBOL(drm_gem_vram_offset);
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204
205int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag)
206{
207 int i, ret;
208 struct ttm_operation_ctx ctx = { false, false };
209
210 ret = ttm_bo_reserve(&gbo->bo, true, false, NULL);
211 if (ret < 0)
212 return ret;
213
214 if (gbo->pin_count)
215 goto out;
216
217 if (pl_flag)
218 drm_gem_vram_placement(gbo, pl_flag);
219
220 for (i = 0; i < gbo->placement.num_placement; ++i)
221 gbo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
222
223 ret = ttm_bo_validate(&gbo->bo, &gbo->placement, &ctx);
224 if (ret < 0)
225 goto err_ttm_bo_unreserve;
226
227out:
228 ++gbo->pin_count;
229 ttm_bo_unreserve(&gbo->bo);
230
231 return 0;
232
233err_ttm_bo_unreserve:
234 ttm_bo_unreserve(&gbo->bo);
235 return ret;
236}
237EXPORT_SYMBOL(drm_gem_vram_pin);
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246
247int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo)
248{
249 int i, ret;
250 struct ttm_operation_ctx ctx = { false, false };
251
252 ret = ttm_bo_reserve(&gbo->bo, true, false, NULL);
253 if (ret < 0)
254 return ret;
255
256 if (WARN_ON_ONCE(!gbo->pin_count))
257 goto out;
258
259 --gbo->pin_count;
260 if (gbo->pin_count)
261 goto out;
262
263 for (i = 0; i < gbo->placement.num_placement ; ++i)
264 gbo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
265
266 ret = ttm_bo_validate(&gbo->bo, &gbo->placement, &ctx);
267 if (ret < 0)
268 goto err_ttm_bo_unreserve;
269
270out:
271 ttm_bo_unreserve(&gbo->bo);
272
273 return 0;
274
275err_ttm_bo_unreserve:
276 ttm_bo_unreserve(&gbo->bo);
277 return ret;
278}
279EXPORT_SYMBOL(drm_gem_vram_unpin);
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298void *drm_gem_vram_kmap(struct drm_gem_vram_object *gbo, bool map,
299 bool *is_iomem)
300{
301 int ret;
302 struct ttm_bo_kmap_obj *kmap = &gbo->kmap;
303
304 if (kmap->virtual || !map)
305 goto out;
306
307 ret = ttm_bo_kmap(&gbo->bo, 0, gbo->bo.num_pages, kmap);
308 if (ret)
309 return ERR_PTR(ret);
310
311out:
312 if (!is_iomem)
313 return kmap->virtual;
314 if (!kmap->virtual) {
315 *is_iomem = false;
316 return NULL;
317 }
318 return ttm_kmap_obj_virtual(kmap, is_iomem);
319}
320EXPORT_SYMBOL(drm_gem_vram_kmap);
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325
326void drm_gem_vram_kunmap(struct drm_gem_vram_object *gbo)
327{
328 struct ttm_bo_kmap_obj *kmap = &gbo->kmap;
329
330 if (!kmap->virtual)
331 return;
332
333 ttm_bo_kunmap(kmap);
334 kmap->virtual = NULL;
335}
336EXPORT_SYMBOL(drm_gem_vram_kunmap);
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358int drm_gem_vram_fill_create_dumb(struct drm_file *file,
359 struct drm_device *dev,
360 struct ttm_bo_device *bdev,
361 unsigned long pg_align,
362 bool interruptible,
363 struct drm_mode_create_dumb *args)
364{
365 size_t pitch, size;
366 struct drm_gem_vram_object *gbo;
367 int ret;
368 u32 handle;
369
370 pitch = args->width * ((args->bpp + 7) / 8);
371 size = pitch * args->height;
372
373 size = roundup(size, PAGE_SIZE);
374 if (!size)
375 return -EINVAL;
376
377 gbo = drm_gem_vram_create(dev, bdev, size, pg_align, interruptible);
378 if (IS_ERR(gbo))
379 return PTR_ERR(gbo);
380
381 ret = drm_gem_handle_create(file, &gbo->gem, &handle);
382 if (ret)
383 goto err_drm_gem_object_put_unlocked;
384
385 drm_gem_object_put_unlocked(&gbo->gem);
386
387 args->pitch = pitch;
388 args->size = size;
389 args->handle = handle;
390
391 return 0;
392
393err_drm_gem_object_put_unlocked:
394 drm_gem_object_put_unlocked(&gbo->gem);
395 return ret;
396}
397EXPORT_SYMBOL(drm_gem_vram_fill_create_dumb);
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402
403static bool drm_is_gem_vram(struct ttm_buffer_object *bo)
404{
405 return (bo->destroy == ttm_buffer_object_destroy);
406}
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413
414void drm_gem_vram_bo_driver_evict_flags(struct ttm_buffer_object *bo,
415 struct ttm_placement *pl)
416{
417 struct drm_gem_vram_object *gbo;
418
419
420 if (!drm_is_gem_vram(bo))
421 return;
422
423 gbo = drm_gem_vram_of_bo(bo);
424 drm_gem_vram_placement(gbo, TTM_PL_FLAG_SYSTEM);
425 *pl = gbo->placement;
426}
427EXPORT_SYMBOL(drm_gem_vram_bo_driver_evict_flags);
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439int drm_gem_vram_bo_driver_verify_access(struct ttm_buffer_object *bo,
440 struct file *filp)
441{
442 struct drm_gem_vram_object *gbo = drm_gem_vram_of_bo(bo);
443
444 return drm_vma_node_verify_access(&gbo->gem.vma_node,
445 filp->private_data);
446}
447EXPORT_SYMBOL(drm_gem_vram_bo_driver_verify_access);
448
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455
456const struct drm_vram_mm_funcs drm_gem_vram_mm_funcs = {
457 .evict_flags = drm_gem_vram_bo_driver_evict_flags,
458 .verify_access = drm_gem_vram_bo_driver_verify_access
459};
460EXPORT_SYMBOL(drm_gem_vram_mm_funcs);
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471void drm_gem_vram_driver_gem_free_object_unlocked(struct drm_gem_object *gem)
472{
473 struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
474
475 drm_gem_vram_put(gbo);
476}
477EXPORT_SYMBOL(drm_gem_vram_driver_gem_free_object_unlocked);
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494int drm_gem_vram_driver_dumb_create(struct drm_file *file,
495 struct drm_device *dev,
496 struct drm_mode_create_dumb *args)
497{
498 if (WARN_ONCE(!dev->vram_mm, "VRAM MM not initialized"))
499 return -EINVAL;
500
501 return drm_gem_vram_fill_create_dumb(file, dev, &dev->vram_mm->bdev, 0,
502 false, args);
503}
504EXPORT_SYMBOL(drm_gem_vram_driver_dumb_create);
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518int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
519 struct drm_device *dev,
520 uint32_t handle, uint64_t *offset)
521{
522 struct drm_gem_object *gem;
523 struct drm_gem_vram_object *gbo;
524
525 gem = drm_gem_object_lookup(file, handle);
526 if (!gem)
527 return -ENOENT;
528
529 gbo = drm_gem_vram_of_gem(gem);
530 *offset = drm_gem_vram_mmap_offset(gbo);
531
532 drm_gem_object_put_unlocked(gem);
533
534 return 0;
535}
536EXPORT_SYMBOL(drm_gem_vram_driver_dumb_mmap_offset);
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551int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *gem)
552{
553 struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
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563 return drm_gem_vram_pin(gbo, 0);
564}
565EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_pin);
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572void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *gem)
573{
574 struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
575
576 drm_gem_vram_unpin(gbo);
577}
578EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_unpin);
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589void *drm_gem_vram_driver_gem_prime_vmap(struct drm_gem_object *gem)
590{
591 struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
592 int ret;
593 void *base;
594
595 ret = drm_gem_vram_pin(gbo, 0);
596 if (ret)
597 return NULL;
598 base = drm_gem_vram_kmap(gbo, true, NULL);
599 if (IS_ERR(base)) {
600 drm_gem_vram_unpin(gbo);
601 return NULL;
602 }
603 return base;
604}
605EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_vmap);
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613void drm_gem_vram_driver_gem_prime_vunmap(struct drm_gem_object *gem,
614 void *vaddr)
615{
616 struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
617
618 drm_gem_vram_kunmap(gbo);
619 drm_gem_vram_unpin(gbo);
620}
621EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_vunmap);
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633int drm_gem_vram_driver_gem_prime_mmap(struct drm_gem_object *gem,
634 struct vm_area_struct *vma)
635{
636 struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
637
638 gbo->gem.vma_node.vm_node.start = gbo->bo.vma_node.vm_node.start;
639 return drm_gem_prime_mmap(gem, vma);
640}
641EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_mmap);
642