Commit | Line | Data |
---|---|---|
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) { |
f6e45661 | 178 | dma_free_wc(drm->dev, bo->gem.size, bo->vaddr, bo->paddr); |
df06b759 TR |
179 | } |
180 | } | |
181 | ||
73c42c79 | 182 | static int tegra_bo_get_pages(struct drm_device *drm, struct tegra_bo *bo) |
df06b759 | 183 | { |
a04251fc | 184 | struct scatterlist *s; |
a04251fc TR |
185 | unsigned int i; |
186 | ||
df06b759 TR |
187 | bo->pages = drm_gem_get_pages(&bo->gem); |
188 | if (IS_ERR(bo->pages)) | |
189 | return PTR_ERR(bo->pages); | |
190 | ||
73c42c79 | 191 | bo->num_pages = bo->gem.size >> PAGE_SHIFT; |
df06b759 | 192 | |
fd73caa5 TR |
193 | bo->sgt = drm_prime_pages_to_sg(bo->pages, bo->num_pages); |
194 | if (IS_ERR(bo->sgt)) | |
a04251fc TR |
195 | goto put_pages; |
196 | ||
197 | /* | |
fd73caa5 TR |
198 | * Fake up the SG table so that dma_sync_sg_for_device() can be used |
199 | * to flush the pages associated with it. | |
a04251fc TR |
200 | * |
201 | * TODO: Replace this by drm_clflash_sg() once it can be implemented | |
202 | * without relying on symbols that are not exported. | |
203 | */ | |
fd73caa5 | 204 | for_each_sg(bo->sgt->sgl, s, bo->sgt->nents, i) |
a04251fc TR |
205 | sg_dma_address(s) = sg_phys(s); |
206 | ||
fd73caa5 TR |
207 | dma_sync_sg_for_device(drm->dev, bo->sgt->sgl, bo->sgt->nents, |
208 | DMA_TO_DEVICE); | |
a04251fc | 209 | |
df06b759 | 210 | return 0; |
a04251fc | 211 | |
a04251fc TR |
212 | put_pages: |
213 | drm_gem_put_pages(&bo->gem, bo->pages, false, false); | |
fd73caa5 | 214 | return PTR_ERR(bo->sgt); |
df06b759 TR |
215 | } |
216 | ||
73c42c79 | 217 | static int tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo) |
df06b759 TR |
218 | { |
219 | struct tegra_drm *tegra = drm->dev_private; | |
220 | int err; | |
221 | ||
222 | if (tegra->domain) { | |
73c42c79 | 223 | err = tegra_bo_get_pages(drm, bo); |
df06b759 TR |
224 | if (err < 0) |
225 | return err; | |
226 | ||
227 | err = tegra_bo_iommu_map(tegra, bo); | |
228 | if (err < 0) { | |
229 | tegra_bo_free(drm, bo); | |
230 | return err; | |
231 | } | |
232 | } else { | |
73c42c79 TR |
233 | size_t size = bo->gem.size; |
234 | ||
f6e45661 LR |
235 | bo->vaddr = dma_alloc_wc(drm->dev, size, &bo->paddr, |
236 | GFP_KERNEL | __GFP_NOWARN); | |
df06b759 TR |
237 | if (!bo->vaddr) { |
238 | dev_err(drm->dev, | |
239 | "failed to allocate buffer of size %zu\n", | |
240 | size); | |
241 | return -ENOMEM; | |
242 | } | |
243 | } | |
244 | ||
245 | return 0; | |
de2ba664 AM |
246 | } |
247 | ||
71c38629 | 248 | struct tegra_bo *tegra_bo_create(struct drm_device *drm, size_t size, |
773af77f | 249 | unsigned long flags) |
de2ba664 AM |
250 | { |
251 | struct tegra_bo *bo; | |
252 | int err; | |
253 | ||
c28d4a31 TR |
254 | bo = tegra_bo_alloc_object(drm, size); |
255 | if (IS_ERR(bo)) | |
256 | return bo; | |
de2ba664 | 257 | |
73c42c79 | 258 | err = tegra_bo_alloc(drm, bo); |
df06b759 TR |
259 | if (err < 0) |
260 | goto release; | |
de2ba664 | 261 | |
773af77f | 262 | if (flags & DRM_TEGRA_GEM_CREATE_TILED) |
c134f019 | 263 | bo->tiling.mode = TEGRA_BO_TILING_MODE_TILED; |
773af77f | 264 | |
db7fbdfd TR |
265 | if (flags & DRM_TEGRA_GEM_CREATE_BOTTOM_UP) |
266 | bo->flags |= TEGRA_BO_BOTTOM_UP; | |
267 | ||
de2ba664 AM |
268 | return bo; |
269 | ||
df06b759 TR |
270 | release: |
271 | drm_gem_object_release(&bo->gem); | |
de2ba664 | 272 | kfree(bo); |
de2ba664 | 273 | return ERR_PTR(err); |
de2ba664 AM |
274 | } |
275 | ||
276 | struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file, | |
3be82743 | 277 | struct drm_device *drm, |
71c38629 | 278 | size_t size, |
773af77f | 279 | unsigned long flags, |
71c38629 | 280 | u32 *handle) |
de2ba664 AM |
281 | { |
282 | struct tegra_bo *bo; | |
a8b48df5 | 283 | int err; |
de2ba664 | 284 | |
773af77f | 285 | bo = tegra_bo_create(drm, size, flags); |
de2ba664 AM |
286 | if (IS_ERR(bo)) |
287 | return bo; | |
288 | ||
a8b48df5 TR |
289 | err = drm_gem_handle_create(file, &bo->gem, handle); |
290 | if (err) { | |
291 | tegra_bo_free_object(&bo->gem); | |
292 | return ERR_PTR(err); | |
293 | } | |
de2ba664 AM |
294 | |
295 | drm_gem_object_unreference_unlocked(&bo->gem); | |
296 | ||
297 | return bo; | |
de2ba664 AM |
298 | } |
299 | ||
540457cc TR |
300 | static struct tegra_bo *tegra_bo_import(struct drm_device *drm, |
301 | struct dma_buf *buf) | |
3800391d | 302 | { |
df06b759 | 303 | struct tegra_drm *tegra = drm->dev_private; |
3800391d TR |
304 | struct dma_buf_attachment *attach; |
305 | struct tegra_bo *bo; | |
3800391d TR |
306 | int err; |
307 | ||
c28d4a31 TR |
308 | bo = tegra_bo_alloc_object(drm, buf->size); |
309 | if (IS_ERR(bo)) | |
310 | return bo; | |
3800391d TR |
311 | |
312 | attach = dma_buf_attach(buf, drm->dev); | |
313 | if (IS_ERR(attach)) { | |
314 | err = PTR_ERR(attach); | |
c28d4a31 | 315 | goto free; |
3800391d TR |
316 | } |
317 | ||
318 | get_dma_buf(buf); | |
319 | ||
320 | bo->sgt = dma_buf_map_attachment(attach, DMA_TO_DEVICE); | |
321 | if (!bo->sgt) { | |
322 | err = -ENOMEM; | |
323 | goto detach; | |
324 | } | |
325 | ||
326 | if (IS_ERR(bo->sgt)) { | |
327 | err = PTR_ERR(bo->sgt); | |
328 | goto detach; | |
329 | } | |
330 | ||
df06b759 TR |
331 | if (tegra->domain) { |
332 | err = tegra_bo_iommu_map(tegra, bo); | |
333 | if (err < 0) | |
334 | goto detach; | |
335 | } else { | |
336 | if (bo->sgt->nents > 1) { | |
337 | err = -EINVAL; | |
338 | goto detach; | |
339 | } | |
340 | ||
341 | bo->paddr = sg_dma_address(bo->sgt->sgl); | |
3800391d TR |
342 | } |
343 | ||
3800391d TR |
344 | bo->gem.import_attach = attach; |
345 | ||
346 | return bo; | |
347 | ||
348 | detach: | |
349 | if (!IS_ERR_OR_NULL(bo->sgt)) | |
350 | dma_buf_unmap_attachment(attach, bo->sgt, DMA_TO_DEVICE); | |
351 | ||
352 | dma_buf_detach(buf, attach); | |
353 | dma_buf_put(buf); | |
3800391d | 354 | free: |
c28d4a31 | 355 | drm_gem_object_release(&bo->gem); |
3800391d | 356 | kfree(bo); |
3800391d TR |
357 | return ERR_PTR(err); |
358 | } | |
359 | ||
de2ba664 AM |
360 | void tegra_bo_free_object(struct drm_gem_object *gem) |
361 | { | |
df06b759 | 362 | struct tegra_drm *tegra = gem->dev->dev_private; |
de2ba664 AM |
363 | struct tegra_bo *bo = to_tegra_bo(gem); |
364 | ||
df06b759 TR |
365 | if (tegra->domain) |
366 | tegra_bo_iommu_unmap(tegra, bo); | |
367 | ||
3800391d TR |
368 | if (gem->import_attach) { |
369 | dma_buf_unmap_attachment(gem->import_attach, bo->sgt, | |
370 | DMA_TO_DEVICE); | |
371 | drm_prime_gem_destroy(gem, NULL); | |
372 | } else { | |
df06b759 | 373 | tegra_bo_free(gem->dev, bo); |
3800391d TR |
374 | } |
375 | ||
de2ba664 | 376 | drm_gem_object_release(gem); |
de2ba664 AM |
377 | kfree(bo); |
378 | } | |
379 | ||
380 | int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm, | |
381 | struct drm_mode_create_dumb *args) | |
382 | { | |
dc6057ec | 383 | unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); |
d1f3e1e0 | 384 | struct tegra_drm *tegra = drm->dev_private; |
de2ba664 AM |
385 | struct tegra_bo *bo; |
386 | ||
dc6057ec TR |
387 | args->pitch = round_up(min_pitch, tegra->pitch_align); |
388 | args->size = args->pitch * args->height; | |
de2ba664 | 389 | |
773af77f | 390 | bo = tegra_bo_create_with_handle(file, drm, args->size, 0, |
3be82743 | 391 | &args->handle); |
de2ba664 AM |
392 | if (IS_ERR(bo)) |
393 | return PTR_ERR(bo); | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | int tegra_bo_dumb_map_offset(struct drm_file *file, struct drm_device *drm, | |
71c38629 | 399 | u32 handle, u64 *offset) |
de2ba664 AM |
400 | { |
401 | struct drm_gem_object *gem; | |
402 | struct tegra_bo *bo; | |
403 | ||
a8ad0bd8 | 404 | gem = drm_gem_object_lookup(file, handle); |
de2ba664 AM |
405 | if (!gem) { |
406 | dev_err(drm->dev, "failed to lookup GEM object\n"); | |
de2ba664 AM |
407 | return -EINVAL; |
408 | } | |
409 | ||
410 | bo = to_tegra_bo(gem); | |
411 | ||
2bc7b0ca | 412 | *offset = drm_vma_node_offset_addr(&bo->gem.vma_node); |
de2ba664 | 413 | |
d849c82f | 414 | drm_gem_object_unreference_unlocked(gem); |
de2ba664 AM |
415 | |
416 | return 0; | |
417 | } | |
418 | ||
df06b759 TR |
419 | static int tegra_bo_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
420 | { | |
421 | struct drm_gem_object *gem = vma->vm_private_data; | |
422 | struct tegra_bo *bo = to_tegra_bo(gem); | |
423 | struct page *page; | |
424 | pgoff_t offset; | |
425 | int err; | |
426 | ||
427 | if (!bo->pages) | |
428 | return VM_FAULT_SIGBUS; | |
429 | ||
430 | offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> PAGE_SHIFT; | |
431 | page = bo->pages[offset]; | |
432 | ||
433 | err = vm_insert_page(vma, (unsigned long)vmf->virtual_address, page); | |
434 | switch (err) { | |
435 | case -EAGAIN: | |
436 | case 0: | |
437 | case -ERESTARTSYS: | |
438 | case -EINTR: | |
439 | case -EBUSY: | |
440 | return VM_FAULT_NOPAGE; | |
441 | ||
442 | case -ENOMEM: | |
443 | return VM_FAULT_OOM; | |
444 | } | |
445 | ||
446 | return VM_FAULT_SIGBUS; | |
447 | } | |
448 | ||
de2ba664 | 449 | const struct vm_operations_struct tegra_bo_vm_ops = { |
df06b759 | 450 | .fault = tegra_bo_fault, |
de2ba664 AM |
451 | .open = drm_gem_vm_open, |
452 | .close = drm_gem_vm_close, | |
453 | }; | |
454 | ||
455 | int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma) | |
456 | { | |
457 | struct drm_gem_object *gem; | |
458 | struct tegra_bo *bo; | |
459 | int ret; | |
460 | ||
461 | ret = drm_gem_mmap(file, vma); | |
462 | if (ret) | |
463 | return ret; | |
464 | ||
465 | gem = vma->vm_private_data; | |
466 | bo = to_tegra_bo(gem); | |
467 | ||
df06b759 TR |
468 | if (!bo->pages) { |
469 | unsigned long vm_pgoff = vma->vm_pgoff; | |
53ea7213 | 470 | |
df06b759 TR |
471 | vma->vm_flags &= ~VM_PFNMAP; |
472 | vma->vm_pgoff = 0; | |
473 | ||
f6e45661 LR |
474 | ret = dma_mmap_wc(gem->dev->dev, vma, bo->vaddr, bo->paddr, |
475 | gem->size); | |
df06b759 TR |
476 | if (ret) { |
477 | drm_gem_vm_close(vma); | |
478 | return ret; | |
479 | } | |
480 | ||
481 | vma->vm_pgoff = vm_pgoff; | |
482 | } else { | |
483 | pgprot_t prot = vm_get_page_prot(vma->vm_flags); | |
53ea7213 | 484 | |
df06b759 TR |
485 | vma->vm_flags |= VM_MIXEDMAP; |
486 | vma->vm_flags &= ~VM_PFNMAP; | |
487 | ||
488 | vma->vm_page_prot = pgprot_writecombine(prot); | |
489 | } | |
de2ba664 | 490 | |
53ea7213 | 491 | return 0; |
de2ba664 | 492 | } |
3800391d TR |
493 | |
494 | static struct sg_table * | |
495 | tegra_gem_prime_map_dma_buf(struct dma_buf_attachment *attach, | |
496 | enum dma_data_direction dir) | |
497 | { | |
498 | struct drm_gem_object *gem = attach->dmabuf->priv; | |
499 | struct tegra_bo *bo = to_tegra_bo(gem); | |
500 | struct sg_table *sgt; | |
501 | ||
502 | sgt = kmalloc(sizeof(*sgt), GFP_KERNEL); | |
503 | if (!sgt) | |
504 | return NULL; | |
505 | ||
df06b759 TR |
506 | if (bo->pages) { |
507 | struct scatterlist *sg; | |
508 | unsigned int i; | |
509 | ||
510 | if (sg_alloc_table(sgt, bo->num_pages, GFP_KERNEL)) | |
511 | goto free; | |
3800391d | 512 | |
df06b759 TR |
513 | for_each_sg(sgt->sgl, sg, bo->num_pages, i) |
514 | sg_set_page(sg, bo->pages[i], PAGE_SIZE, 0); | |
515 | ||
516 | if (dma_map_sg(attach->dev, sgt->sgl, sgt->nents, dir) == 0) | |
517 | goto free; | |
518 | } else { | |
519 | if (sg_alloc_table(sgt, 1, GFP_KERNEL)) | |
520 | goto free; | |
521 | ||
522 | sg_dma_address(sgt->sgl) = bo->paddr; | |
523 | sg_dma_len(sgt->sgl) = gem->size; | |
524 | } | |
3800391d TR |
525 | |
526 | return sgt; | |
df06b759 TR |
527 | |
528 | free: | |
529 | sg_free_table(sgt); | |
530 | kfree(sgt); | |
531 | return NULL; | |
3800391d TR |
532 | } |
533 | ||
534 | static void tegra_gem_prime_unmap_dma_buf(struct dma_buf_attachment *attach, | |
535 | struct sg_table *sgt, | |
536 | enum dma_data_direction dir) | |
537 | { | |
df06b759 TR |
538 | struct drm_gem_object *gem = attach->dmabuf->priv; |
539 | struct tegra_bo *bo = to_tegra_bo(gem); | |
540 | ||
541 | if (bo->pages) | |
542 | dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir); | |
543 | ||
3800391d TR |
544 | sg_free_table(sgt); |
545 | kfree(sgt); | |
546 | } | |
547 | ||
548 | static void tegra_gem_prime_release(struct dma_buf *buf) | |
549 | { | |
550 | drm_gem_dmabuf_release(buf); | |
551 | } | |
552 | ||
553 | static void *tegra_gem_prime_kmap_atomic(struct dma_buf *buf, | |
554 | unsigned long page) | |
555 | { | |
556 | return NULL; | |
557 | } | |
558 | ||
559 | static void tegra_gem_prime_kunmap_atomic(struct dma_buf *buf, | |
560 | unsigned long page, | |
561 | void *addr) | |
562 | { | |
563 | } | |
564 | ||
565 | static void *tegra_gem_prime_kmap(struct dma_buf *buf, unsigned long page) | |
566 | { | |
567 | return NULL; | |
568 | } | |
569 | ||
570 | static void tegra_gem_prime_kunmap(struct dma_buf *buf, unsigned long page, | |
571 | void *addr) | |
572 | { | |
573 | } | |
574 | ||
575 | static int tegra_gem_prime_mmap(struct dma_buf *buf, struct vm_area_struct *vma) | |
576 | { | |
577 | return -EINVAL; | |
578 | } | |
579 | ||
d40326f4 TR |
580 | static void *tegra_gem_prime_vmap(struct dma_buf *buf) |
581 | { | |
582 | struct drm_gem_object *gem = buf->priv; | |
583 | struct tegra_bo *bo = to_tegra_bo(gem); | |
584 | ||
585 | return bo->vaddr; | |
586 | } | |
587 | ||
588 | static void tegra_gem_prime_vunmap(struct dma_buf *buf, void *vaddr) | |
589 | { | |
590 | } | |
591 | ||
3800391d TR |
592 | static const struct dma_buf_ops tegra_gem_prime_dmabuf_ops = { |
593 | .map_dma_buf = tegra_gem_prime_map_dma_buf, | |
594 | .unmap_dma_buf = tegra_gem_prime_unmap_dma_buf, | |
595 | .release = tegra_gem_prime_release, | |
596 | .kmap_atomic = tegra_gem_prime_kmap_atomic, | |
597 | .kunmap_atomic = tegra_gem_prime_kunmap_atomic, | |
598 | .kmap = tegra_gem_prime_kmap, | |
599 | .kunmap = tegra_gem_prime_kunmap, | |
600 | .mmap = tegra_gem_prime_mmap, | |
d40326f4 TR |
601 | .vmap = tegra_gem_prime_vmap, |
602 | .vunmap = tegra_gem_prime_vunmap, | |
3800391d TR |
603 | }; |
604 | ||
605 | struct dma_buf *tegra_gem_prime_export(struct drm_device *drm, | |
606 | struct drm_gem_object *gem, | |
607 | int flags) | |
608 | { | |
d8fbe341 SS |
609 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); |
610 | ||
611 | exp_info.ops = &tegra_gem_prime_dmabuf_ops; | |
612 | exp_info.size = gem->size; | |
613 | exp_info.flags = flags; | |
614 | exp_info.priv = gem; | |
615 | ||
616 | return dma_buf_export(&exp_info); | |
3800391d TR |
617 | } |
618 | ||
619 | struct drm_gem_object *tegra_gem_prime_import(struct drm_device *drm, | |
620 | struct dma_buf *buf) | |
621 | { | |
622 | struct tegra_bo *bo; | |
623 | ||
624 | if (buf->ops == &tegra_gem_prime_dmabuf_ops) { | |
625 | struct drm_gem_object *gem = buf->priv; | |
626 | ||
627 | if (gem->dev == drm) { | |
628 | drm_gem_object_reference(gem); | |
629 | return gem; | |
630 | } | |
631 | } | |
632 | ||
633 | bo = tegra_bo_import(drm, buf); | |
634 | if (IS_ERR(bo)) | |
635 | return ERR_CAST(bo); | |
636 | ||
637 | return &bo->gem; | |
638 | } |