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Commit | Line | Data |
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de2ba664 AM |
1 | /* |
2 | * NVIDIA Tegra DRM GEM helper functions | |
3 | * | |
4 | * Copyright (C) 2012 Sascha Hauer, Pengutronix | |
5 | * Copyright (C) 2013 NVIDIA CORPORATION, All rights reserved. | |
6 | * | |
7 | * Based on the GEM/CMA helpers | |
8 | * | |
9 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
10 | * | |
9a2ac2dc TR |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
de2ba664 AM |
14 | */ |
15 | ||
3800391d | 16 | #include <linux/dma-buf.h> |
df06b759 | 17 | #include <linux/iommu.h> |
773af77f TR |
18 | #include <drm/tegra_drm.h> |
19 | ||
d1f3e1e0 | 20 | #include "drm.h" |
de2ba664 AM |
21 | #include "gem.h" |
22 | ||
3be82743 | 23 | static inline struct tegra_bo *host1x_to_tegra_bo(struct host1x_bo *bo) |
de2ba664 AM |
24 | { |
25 | return container_of(bo, struct tegra_bo, base); | |
26 | } | |
27 | ||
28 | static void tegra_bo_put(struct host1x_bo *bo) | |
29 | { | |
3be82743 | 30 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
de2ba664 | 31 | |
a07cdfe5 | 32 | drm_gem_object_unreference_unlocked(&obj->gem); |
de2ba664 AM |
33 | } |
34 | ||
35 | static dma_addr_t tegra_bo_pin(struct host1x_bo *bo, struct sg_table **sgt) | |
36 | { | |
3be82743 | 37 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
de2ba664 AM |
38 | |
39 | return obj->paddr; | |
40 | } | |
41 | ||
42 | static void tegra_bo_unpin(struct host1x_bo *bo, struct sg_table *sgt) | |
43 | { | |
44 | } | |
45 | ||
46 | static void *tegra_bo_mmap(struct host1x_bo *bo) | |
47 | { | |
3be82743 | 48 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
de2ba664 AM |
49 | |
50 | return obj->vaddr; | |
51 | } | |
52 | ||
53 | static void tegra_bo_munmap(struct host1x_bo *bo, void *addr) | |
54 | { | |
55 | } | |
56 | ||
57 | static void *tegra_bo_kmap(struct host1x_bo *bo, unsigned int page) | |
58 | { | |
3be82743 | 59 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
de2ba664 AM |
60 | |
61 | return obj->vaddr + page * PAGE_SIZE; | |
62 | } | |
63 | ||
64 | static void tegra_bo_kunmap(struct host1x_bo *bo, unsigned int page, | |
65 | void *addr) | |
66 | { | |
67 | } | |
68 | ||
69 | static struct host1x_bo *tegra_bo_get(struct host1x_bo *bo) | |
70 | { | |
3be82743 | 71 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
de2ba664 | 72 | |
de2ba664 | 73 | drm_gem_object_reference(&obj->gem); |
de2ba664 AM |
74 | |
75 | return bo; | |
76 | } | |
77 | ||
425c0fdc | 78 | static const struct host1x_bo_ops tegra_bo_ops = { |
de2ba664 AM |
79 | .get = tegra_bo_get, |
80 | .put = tegra_bo_put, | |
81 | .pin = tegra_bo_pin, | |
82 | .unpin = tegra_bo_unpin, | |
83 | .mmap = tegra_bo_mmap, | |
84 | .munmap = tegra_bo_munmap, | |
85 | .kmap = tegra_bo_kmap, | |
86 | .kunmap = tegra_bo_kunmap, | |
87 | }; | |
88 | ||
df06b759 TR |
89 | static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo) |
90 | { | |
91 | int prot = IOMMU_READ | IOMMU_WRITE; | |
92 | ssize_t err; | |
93 | ||
94 | if (bo->mm) | |
95 | return -EBUSY; | |
96 | ||
97 | bo->mm = kzalloc(sizeof(*bo->mm), GFP_KERNEL); | |
98 | if (!bo->mm) | |
99 | return -ENOMEM; | |
100 | ||
101 | err = drm_mm_insert_node_generic(&tegra->mm, bo->mm, bo->gem.size, | |
102 | PAGE_SIZE, 0, 0, 0); | |
103 | if (err < 0) { | |
104 | dev_err(tegra->drm->dev, "out of I/O virtual memory: %zd\n", | |
105 | err); | |
106 | goto free; | |
107 | } | |
108 | ||
109 | bo->paddr = bo->mm->start; | |
110 | ||
8c8cb58e TR |
111 | err = iommu_map_sg(tegra->domain, bo->paddr, bo->sgt->sgl, |
112 | bo->sgt->nents, prot); | |
df06b759 TR |
113 | if (err < 0) { |
114 | dev_err(tegra->drm->dev, "failed to map buffer: %zd\n", err); | |
115 | goto remove; | |
116 | } | |
117 | ||
118 | bo->size = err; | |
119 | ||
120 | return 0; | |
121 | ||
122 | remove: | |
123 | drm_mm_remove_node(bo->mm); | |
124 | free: | |
125 | kfree(bo->mm); | |
126 | return err; | |
127 | } | |
128 | ||
129 | static int tegra_bo_iommu_unmap(struct tegra_drm *tegra, struct tegra_bo *bo) | |
130 | { | |
131 | if (!bo->mm) | |
132 | return 0; | |
133 | ||
134 | iommu_unmap(tegra->domain, bo->paddr, bo->size); | |
135 | drm_mm_remove_node(bo->mm); | |
136 | kfree(bo->mm); | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
c28d4a31 TR |
141 | static struct tegra_bo *tegra_bo_alloc_object(struct drm_device *drm, |
142 | size_t size) | |
143 | { | |
144 | struct tegra_bo *bo; | |
145 | int err; | |
146 | ||
147 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
148 | if (!bo) | |
149 | return ERR_PTR(-ENOMEM); | |
150 | ||
151 | host1x_bo_init(&bo->base, &tegra_bo_ops); | |
152 | size = round_up(size, PAGE_SIZE); | |
153 | ||
154 | err = drm_gem_object_init(drm, &bo->gem, size); | |
155 | if (err < 0) | |
156 | goto free; | |
157 | ||
158 | err = drm_gem_create_mmap_offset(&bo->gem); | |
159 | if (err < 0) | |
160 | goto release; | |
161 | ||
162 | return bo; | |
163 | ||
164 | release: | |
165 | drm_gem_object_release(&bo->gem); | |
166 | free: | |
167 | kfree(bo); | |
168 | return ERR_PTR(err); | |
169 | } | |
170 | ||
df06b759 | 171 | static void tegra_bo_free(struct drm_device *drm, struct tegra_bo *bo) |
de2ba664 | 172 | { |
df06b759 TR |
173 | if (bo->pages) { |
174 | drm_gem_put_pages(&bo->gem, bo->pages, true, true); | |
175 | sg_free_table(bo->sgt); | |
176 | kfree(bo->sgt); | |
7e0180e3 | 177 | } else if (bo->vaddr) { |
df06b759 TR |
178 | dma_free_writecombine(drm->dev, bo->gem.size, bo->vaddr, |
179 | bo->paddr); | |
180 | } | |
181 | } | |
182 | ||
73c42c79 | 183 | static int tegra_bo_get_pages(struct drm_device *drm, struct tegra_bo *bo) |
df06b759 | 184 | { |
a04251fc | 185 | struct scatterlist *s; |
a04251fc TR |
186 | unsigned int i; |
187 | ||
df06b759 TR |
188 | bo->pages = drm_gem_get_pages(&bo->gem); |
189 | if (IS_ERR(bo->pages)) | |
190 | return PTR_ERR(bo->pages); | |
191 | ||
73c42c79 | 192 | bo->num_pages = bo->gem.size >> PAGE_SHIFT; |
df06b759 | 193 | |
fd73caa5 TR |
194 | bo->sgt = drm_prime_pages_to_sg(bo->pages, bo->num_pages); |
195 | if (IS_ERR(bo->sgt)) | |
a04251fc TR |
196 | goto put_pages; |
197 | ||
198 | /* | |
fd73caa5 TR |
199 | * Fake up the SG table so that dma_sync_sg_for_device() can be used |
200 | * to flush the pages associated with it. | |
a04251fc TR |
201 | * |
202 | * TODO: Replace this by drm_clflash_sg() once it can be implemented | |
203 | * without relying on symbols that are not exported. | |
204 | */ | |
fd73caa5 | 205 | for_each_sg(bo->sgt->sgl, s, bo->sgt->nents, i) |
a04251fc TR |
206 | sg_dma_address(s) = sg_phys(s); |
207 | ||
fd73caa5 TR |
208 | dma_sync_sg_for_device(drm->dev, bo->sgt->sgl, bo->sgt->nents, |
209 | DMA_TO_DEVICE); | |
a04251fc | 210 | |
df06b759 | 211 | return 0; |
a04251fc | 212 | |
a04251fc TR |
213 | put_pages: |
214 | drm_gem_put_pages(&bo->gem, bo->pages, false, false); | |
fd73caa5 | 215 | return PTR_ERR(bo->sgt); |
df06b759 TR |
216 | } |
217 | ||
73c42c79 | 218 | static int tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo) |
df06b759 TR |
219 | { |
220 | struct tegra_drm *tegra = drm->dev_private; | |
221 | int err; | |
222 | ||
223 | if (tegra->domain) { | |
73c42c79 | 224 | err = tegra_bo_get_pages(drm, bo); |
df06b759 TR |
225 | if (err < 0) |
226 | return err; | |
227 | ||
228 | err = tegra_bo_iommu_map(tegra, bo); | |
229 | if (err < 0) { | |
230 | tegra_bo_free(drm, bo); | |
231 | return err; | |
232 | } | |
233 | } else { | |
73c42c79 TR |
234 | size_t size = bo->gem.size; |
235 | ||
df06b759 TR |
236 | bo->vaddr = dma_alloc_writecombine(drm->dev, size, &bo->paddr, |
237 | GFP_KERNEL | __GFP_NOWARN); | |
238 | if (!bo->vaddr) { | |
239 | dev_err(drm->dev, | |
240 | "failed to allocate buffer of size %zu\n", | |
241 | size); | |
242 | return -ENOMEM; | |
243 | } | |
244 | } | |
245 | ||
246 | return 0; | |
de2ba664 AM |
247 | } |
248 | ||
71c38629 | 249 | struct tegra_bo *tegra_bo_create(struct drm_device *drm, size_t size, |
773af77f | 250 | unsigned long flags) |
de2ba664 AM |
251 | { |
252 | struct tegra_bo *bo; | |
253 | int err; | |
254 | ||
c28d4a31 TR |
255 | bo = tegra_bo_alloc_object(drm, size); |
256 | if (IS_ERR(bo)) | |
257 | return bo; | |
de2ba664 | 258 | |
73c42c79 | 259 | err = tegra_bo_alloc(drm, bo); |
df06b759 TR |
260 | if (err < 0) |
261 | goto release; | |
de2ba664 | 262 | |
773af77f | 263 | if (flags & DRM_TEGRA_GEM_CREATE_TILED) |
c134f019 | 264 | bo->tiling.mode = TEGRA_BO_TILING_MODE_TILED; |
773af77f | 265 | |
db7fbdfd TR |
266 | if (flags & DRM_TEGRA_GEM_CREATE_BOTTOM_UP) |
267 | bo->flags |= TEGRA_BO_BOTTOM_UP; | |
268 | ||
de2ba664 AM |
269 | return bo; |
270 | ||
df06b759 TR |
271 | release: |
272 | drm_gem_object_release(&bo->gem); | |
de2ba664 | 273 | kfree(bo); |
de2ba664 | 274 | return ERR_PTR(err); |
de2ba664 AM |
275 | } |
276 | ||
277 | struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file, | |
3be82743 | 278 | struct drm_device *drm, |
71c38629 | 279 | size_t size, |
773af77f | 280 | unsigned long flags, |
71c38629 | 281 | u32 *handle) |
de2ba664 AM |
282 | { |
283 | struct tegra_bo *bo; | |
a8b48df5 | 284 | int err; |
de2ba664 | 285 | |
773af77f | 286 | bo = tegra_bo_create(drm, size, flags); |
de2ba664 AM |
287 | if (IS_ERR(bo)) |
288 | return bo; | |
289 | ||
a8b48df5 TR |
290 | err = drm_gem_handle_create(file, &bo->gem, handle); |
291 | if (err) { | |
292 | tegra_bo_free_object(&bo->gem); | |
293 | return ERR_PTR(err); | |
294 | } | |
de2ba664 AM |
295 | |
296 | drm_gem_object_unreference_unlocked(&bo->gem); | |
297 | ||
298 | return bo; | |
de2ba664 AM |
299 | } |
300 | ||
540457cc TR |
301 | static struct tegra_bo *tegra_bo_import(struct drm_device *drm, |
302 | struct dma_buf *buf) | |
3800391d | 303 | { |
df06b759 | 304 | struct tegra_drm *tegra = drm->dev_private; |
3800391d TR |
305 | struct dma_buf_attachment *attach; |
306 | struct tegra_bo *bo; | |
3800391d TR |
307 | int err; |
308 | ||
c28d4a31 TR |
309 | bo = tegra_bo_alloc_object(drm, buf->size); |
310 | if (IS_ERR(bo)) | |
311 | return bo; | |
3800391d TR |
312 | |
313 | attach = dma_buf_attach(buf, drm->dev); | |
314 | if (IS_ERR(attach)) { | |
315 | err = PTR_ERR(attach); | |
c28d4a31 | 316 | goto free; |
3800391d TR |
317 | } |
318 | ||
319 | get_dma_buf(buf); | |
320 | ||
321 | bo->sgt = dma_buf_map_attachment(attach, DMA_TO_DEVICE); | |
322 | if (!bo->sgt) { | |
323 | err = -ENOMEM; | |
324 | goto detach; | |
325 | } | |
326 | ||
327 | if (IS_ERR(bo->sgt)) { | |
328 | err = PTR_ERR(bo->sgt); | |
329 | goto detach; | |
330 | } | |
331 | ||
df06b759 TR |
332 | if (tegra->domain) { |
333 | err = tegra_bo_iommu_map(tegra, bo); | |
334 | if (err < 0) | |
335 | goto detach; | |
336 | } else { | |
337 | if (bo->sgt->nents > 1) { | |
338 | err = -EINVAL; | |
339 | goto detach; | |
340 | } | |
341 | ||
342 | bo->paddr = sg_dma_address(bo->sgt->sgl); | |
3800391d TR |
343 | } |
344 | ||
3800391d TR |
345 | bo->gem.import_attach = attach; |
346 | ||
347 | return bo; | |
348 | ||
349 | detach: | |
350 | if (!IS_ERR_OR_NULL(bo->sgt)) | |
351 | dma_buf_unmap_attachment(attach, bo->sgt, DMA_TO_DEVICE); | |
352 | ||
353 | dma_buf_detach(buf, attach); | |
354 | dma_buf_put(buf); | |
3800391d | 355 | free: |
c28d4a31 | 356 | drm_gem_object_release(&bo->gem); |
3800391d | 357 | kfree(bo); |
3800391d TR |
358 | return ERR_PTR(err); |
359 | } | |
360 | ||
de2ba664 AM |
361 | void tegra_bo_free_object(struct drm_gem_object *gem) |
362 | { | |
df06b759 | 363 | struct tegra_drm *tegra = gem->dev->dev_private; |
de2ba664 AM |
364 | struct tegra_bo *bo = to_tegra_bo(gem); |
365 | ||
df06b759 TR |
366 | if (tegra->domain) |
367 | tegra_bo_iommu_unmap(tegra, bo); | |
368 | ||
3800391d TR |
369 | if (gem->import_attach) { |
370 | dma_buf_unmap_attachment(gem->import_attach, bo->sgt, | |
371 | DMA_TO_DEVICE); | |
372 | drm_prime_gem_destroy(gem, NULL); | |
373 | } else { | |
df06b759 | 374 | tegra_bo_free(gem->dev, bo); |
3800391d TR |
375 | } |
376 | ||
de2ba664 | 377 | drm_gem_object_release(gem); |
de2ba664 AM |
378 | kfree(bo); |
379 | } | |
380 | ||
381 | int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm, | |
382 | struct drm_mode_create_dumb *args) | |
383 | { | |
dc6057ec | 384 | unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); |
d1f3e1e0 | 385 | struct tegra_drm *tegra = drm->dev_private; |
de2ba664 AM |
386 | struct tegra_bo *bo; |
387 | ||
dc6057ec TR |
388 | args->pitch = round_up(min_pitch, tegra->pitch_align); |
389 | args->size = args->pitch * args->height; | |
de2ba664 | 390 | |
773af77f | 391 | bo = tegra_bo_create_with_handle(file, drm, args->size, 0, |
3be82743 | 392 | &args->handle); |
de2ba664 AM |
393 | if (IS_ERR(bo)) |
394 | return PTR_ERR(bo); | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | int tegra_bo_dumb_map_offset(struct drm_file *file, struct drm_device *drm, | |
71c38629 | 400 | u32 handle, u64 *offset) |
de2ba664 AM |
401 | { |
402 | struct drm_gem_object *gem; | |
403 | struct tegra_bo *bo; | |
404 | ||
de2ba664 AM |
405 | gem = drm_gem_object_lookup(drm, file, handle); |
406 | if (!gem) { | |
407 | dev_err(drm->dev, "failed to lookup GEM object\n"); | |
de2ba664 AM |
408 | return -EINVAL; |
409 | } | |
410 | ||
411 | bo = to_tegra_bo(gem); | |
412 | ||
2bc7b0ca | 413 | *offset = drm_vma_node_offset_addr(&bo->gem.vma_node); |
de2ba664 | 414 | |
d849c82f | 415 | drm_gem_object_unreference_unlocked(gem); |
de2ba664 AM |
416 | |
417 | return 0; | |
418 | } | |
419 | ||
df06b759 TR |
420 | static int tegra_bo_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
421 | { | |
422 | struct drm_gem_object *gem = vma->vm_private_data; | |
423 | struct tegra_bo *bo = to_tegra_bo(gem); | |
424 | struct page *page; | |
425 | pgoff_t offset; | |
426 | int err; | |
427 | ||
428 | if (!bo->pages) | |
429 | return VM_FAULT_SIGBUS; | |
430 | ||
431 | offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> PAGE_SHIFT; | |
432 | page = bo->pages[offset]; | |
433 | ||
434 | err = vm_insert_page(vma, (unsigned long)vmf->virtual_address, page); | |
435 | switch (err) { | |
436 | case -EAGAIN: | |
437 | case 0: | |
438 | case -ERESTARTSYS: | |
439 | case -EINTR: | |
440 | case -EBUSY: | |
441 | return VM_FAULT_NOPAGE; | |
442 | ||
443 | case -ENOMEM: | |
444 | return VM_FAULT_OOM; | |
445 | } | |
446 | ||
447 | return VM_FAULT_SIGBUS; | |
448 | } | |
449 | ||
de2ba664 | 450 | const struct vm_operations_struct tegra_bo_vm_ops = { |
df06b759 | 451 | .fault = tegra_bo_fault, |
de2ba664 AM |
452 | .open = drm_gem_vm_open, |
453 | .close = drm_gem_vm_close, | |
454 | }; | |
455 | ||
456 | int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma) | |
457 | { | |
458 | struct drm_gem_object *gem; | |
459 | struct tegra_bo *bo; | |
460 | int ret; | |
461 | ||
462 | ret = drm_gem_mmap(file, vma); | |
463 | if (ret) | |
464 | return ret; | |
465 | ||
466 | gem = vma->vm_private_data; | |
467 | bo = to_tegra_bo(gem); | |
468 | ||
df06b759 TR |
469 | if (!bo->pages) { |
470 | unsigned long vm_pgoff = vma->vm_pgoff; | |
53ea7213 | 471 | |
df06b759 TR |
472 | vma->vm_flags &= ~VM_PFNMAP; |
473 | vma->vm_pgoff = 0; | |
474 | ||
475 | ret = dma_mmap_writecombine(gem->dev->dev, vma, bo->vaddr, | |
476 | bo->paddr, gem->size); | |
477 | if (ret) { | |
478 | drm_gem_vm_close(vma); | |
479 | return ret; | |
480 | } | |
481 | ||
482 | vma->vm_pgoff = vm_pgoff; | |
483 | } else { | |
484 | pgprot_t prot = vm_get_page_prot(vma->vm_flags); | |
53ea7213 | 485 | |
df06b759 TR |
486 | vma->vm_flags |= VM_MIXEDMAP; |
487 | vma->vm_flags &= ~VM_PFNMAP; | |
488 | ||
489 | vma->vm_page_prot = pgprot_writecombine(prot); | |
490 | } | |
de2ba664 | 491 | |
53ea7213 | 492 | return 0; |
de2ba664 | 493 | } |
3800391d TR |
494 | |
495 | static struct sg_table * | |
496 | tegra_gem_prime_map_dma_buf(struct dma_buf_attachment *attach, | |
497 | enum dma_data_direction dir) | |
498 | { | |
499 | struct drm_gem_object *gem = attach->dmabuf->priv; | |
500 | struct tegra_bo *bo = to_tegra_bo(gem); | |
501 | struct sg_table *sgt; | |
502 | ||
503 | sgt = kmalloc(sizeof(*sgt), GFP_KERNEL); | |
504 | if (!sgt) | |
505 | return NULL; | |
506 | ||
df06b759 TR |
507 | if (bo->pages) { |
508 | struct scatterlist *sg; | |
509 | unsigned int i; | |
510 | ||
511 | if (sg_alloc_table(sgt, bo->num_pages, GFP_KERNEL)) | |
512 | goto free; | |
3800391d | 513 | |
df06b759 TR |
514 | for_each_sg(sgt->sgl, sg, bo->num_pages, i) |
515 | sg_set_page(sg, bo->pages[i], PAGE_SIZE, 0); | |
516 | ||
517 | if (dma_map_sg(attach->dev, sgt->sgl, sgt->nents, dir) == 0) | |
518 | goto free; | |
519 | } else { | |
520 | if (sg_alloc_table(sgt, 1, GFP_KERNEL)) | |
521 | goto free; | |
522 | ||
523 | sg_dma_address(sgt->sgl) = bo->paddr; | |
524 | sg_dma_len(sgt->sgl) = gem->size; | |
525 | } | |
3800391d TR |
526 | |
527 | return sgt; | |
df06b759 TR |
528 | |
529 | free: | |
530 | sg_free_table(sgt); | |
531 | kfree(sgt); | |
532 | return NULL; | |
3800391d TR |
533 | } |
534 | ||
535 | static void tegra_gem_prime_unmap_dma_buf(struct dma_buf_attachment *attach, | |
536 | struct sg_table *sgt, | |
537 | enum dma_data_direction dir) | |
538 | { | |
df06b759 TR |
539 | struct drm_gem_object *gem = attach->dmabuf->priv; |
540 | struct tegra_bo *bo = to_tegra_bo(gem); | |
541 | ||
542 | if (bo->pages) | |
543 | dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir); | |
544 | ||
3800391d TR |
545 | sg_free_table(sgt); |
546 | kfree(sgt); | |
547 | } | |
548 | ||
549 | static void tegra_gem_prime_release(struct dma_buf *buf) | |
550 | { | |
551 | drm_gem_dmabuf_release(buf); | |
552 | } | |
553 | ||
554 | static void *tegra_gem_prime_kmap_atomic(struct dma_buf *buf, | |
555 | unsigned long page) | |
556 | { | |
557 | return NULL; | |
558 | } | |
559 | ||
560 | static void tegra_gem_prime_kunmap_atomic(struct dma_buf *buf, | |
561 | unsigned long page, | |
562 | void *addr) | |
563 | { | |
564 | } | |
565 | ||
566 | static void *tegra_gem_prime_kmap(struct dma_buf *buf, unsigned long page) | |
567 | { | |
568 | return NULL; | |
569 | } | |
570 | ||
571 | static void tegra_gem_prime_kunmap(struct dma_buf *buf, unsigned long page, | |
572 | void *addr) | |
573 | { | |
574 | } | |
575 | ||
576 | static int tegra_gem_prime_mmap(struct dma_buf *buf, struct vm_area_struct *vma) | |
577 | { | |
578 | return -EINVAL; | |
579 | } | |
580 | ||
d40326f4 TR |
581 | static void *tegra_gem_prime_vmap(struct dma_buf *buf) |
582 | { | |
583 | struct drm_gem_object *gem = buf->priv; | |
584 | struct tegra_bo *bo = to_tegra_bo(gem); | |
585 | ||
586 | return bo->vaddr; | |
587 | } | |
588 | ||
589 | static void tegra_gem_prime_vunmap(struct dma_buf *buf, void *vaddr) | |
590 | { | |
591 | } | |
592 | ||
3800391d TR |
593 | static const struct dma_buf_ops tegra_gem_prime_dmabuf_ops = { |
594 | .map_dma_buf = tegra_gem_prime_map_dma_buf, | |
595 | .unmap_dma_buf = tegra_gem_prime_unmap_dma_buf, | |
596 | .release = tegra_gem_prime_release, | |
597 | .kmap_atomic = tegra_gem_prime_kmap_atomic, | |
598 | .kunmap_atomic = tegra_gem_prime_kunmap_atomic, | |
599 | .kmap = tegra_gem_prime_kmap, | |
600 | .kunmap = tegra_gem_prime_kunmap, | |
601 | .mmap = tegra_gem_prime_mmap, | |
d40326f4 TR |
602 | .vmap = tegra_gem_prime_vmap, |
603 | .vunmap = tegra_gem_prime_vunmap, | |
3800391d TR |
604 | }; |
605 | ||
606 | struct dma_buf *tegra_gem_prime_export(struct drm_device *drm, | |
607 | struct drm_gem_object *gem, | |
608 | int flags) | |
609 | { | |
d8fbe341 SS |
610 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); |
611 | ||
612 | exp_info.ops = &tegra_gem_prime_dmabuf_ops; | |
613 | exp_info.size = gem->size; | |
614 | exp_info.flags = flags; | |
615 | exp_info.priv = gem; | |
616 | ||
617 | return dma_buf_export(&exp_info); | |
3800391d TR |
618 | } |
619 | ||
620 | struct drm_gem_object *tegra_gem_prime_import(struct drm_device *drm, | |
621 | struct dma_buf *buf) | |
622 | { | |
623 | struct tegra_bo *bo; | |
624 | ||
625 | if (buf->ops == &tegra_gem_prime_dmabuf_ops) { | |
626 | struct drm_gem_object *gem = buf->priv; | |
627 | ||
628 | if (gem->dev == drm) { | |
629 | drm_gem_object_reference(gem); | |
630 | return gem; | |
631 | } | |
632 | } | |
633 | ||
634 | bo = tegra_bo_import(drm, buf); | |
635 | if (IS_ERR(bo)) | |
636 | return ERR_CAST(bo); | |
637 | ||
638 | return &bo->gem; | |
639 | } |