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 AM |
31 | struct drm_device *drm = obj->gem.dev; |
32 | ||
33 | mutex_lock(&drm->struct_mutex); | |
34 | drm_gem_object_unreference(&obj->gem); | |
35 | mutex_unlock(&drm->struct_mutex); | |
36 | } | |
37 | ||
38 | static dma_addr_t tegra_bo_pin(struct host1x_bo *bo, struct sg_table **sgt) | |
39 | { | |
3be82743 | 40 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
de2ba664 AM |
41 | |
42 | return obj->paddr; | |
43 | } | |
44 | ||
45 | static void tegra_bo_unpin(struct host1x_bo *bo, struct sg_table *sgt) | |
46 | { | |
47 | } | |
48 | ||
49 | static void *tegra_bo_mmap(struct host1x_bo *bo) | |
50 | { | |
3be82743 | 51 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
de2ba664 AM |
52 | |
53 | return obj->vaddr; | |
54 | } | |
55 | ||
56 | static void tegra_bo_munmap(struct host1x_bo *bo, void *addr) | |
57 | { | |
58 | } | |
59 | ||
60 | static void *tegra_bo_kmap(struct host1x_bo *bo, unsigned int page) | |
61 | { | |
3be82743 | 62 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
de2ba664 AM |
63 | |
64 | return obj->vaddr + page * PAGE_SIZE; | |
65 | } | |
66 | ||
67 | static void tegra_bo_kunmap(struct host1x_bo *bo, unsigned int page, | |
68 | void *addr) | |
69 | { | |
70 | } | |
71 | ||
72 | static struct host1x_bo *tegra_bo_get(struct host1x_bo *bo) | |
73 | { | |
3be82743 | 74 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
de2ba664 AM |
75 | struct drm_device *drm = obj->gem.dev; |
76 | ||
77 | mutex_lock(&drm->struct_mutex); | |
78 | drm_gem_object_reference(&obj->gem); | |
79 | mutex_unlock(&drm->struct_mutex); | |
80 | ||
81 | return bo; | |
82 | } | |
83 | ||
425c0fdc | 84 | static const struct host1x_bo_ops tegra_bo_ops = { |
de2ba664 AM |
85 | .get = tegra_bo_get, |
86 | .put = tegra_bo_put, | |
87 | .pin = tegra_bo_pin, | |
88 | .unpin = tegra_bo_unpin, | |
89 | .mmap = tegra_bo_mmap, | |
90 | .munmap = tegra_bo_munmap, | |
91 | .kmap = tegra_bo_kmap, | |
92 | .kunmap = tegra_bo_kunmap, | |
93 | }; | |
94 | ||
df06b759 TR |
95 | static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo) |
96 | { | |
97 | int prot = IOMMU_READ | IOMMU_WRITE; | |
98 | ssize_t err; | |
99 | ||
100 | if (bo->mm) | |
101 | return -EBUSY; | |
102 | ||
103 | bo->mm = kzalloc(sizeof(*bo->mm), GFP_KERNEL); | |
104 | if (!bo->mm) | |
105 | return -ENOMEM; | |
106 | ||
107 | err = drm_mm_insert_node_generic(&tegra->mm, bo->mm, bo->gem.size, | |
108 | PAGE_SIZE, 0, 0, 0); | |
109 | if (err < 0) { | |
110 | dev_err(tegra->drm->dev, "out of I/O virtual memory: %zd\n", | |
111 | err); | |
112 | goto free; | |
113 | } | |
114 | ||
115 | bo->paddr = bo->mm->start; | |
116 | ||
8c8cb58e TR |
117 | err = iommu_map_sg(tegra->domain, bo->paddr, bo->sgt->sgl, |
118 | bo->sgt->nents, prot); | |
df06b759 TR |
119 | if (err < 0) { |
120 | dev_err(tegra->drm->dev, "failed to map buffer: %zd\n", err); | |
121 | goto remove; | |
122 | } | |
123 | ||
124 | bo->size = err; | |
125 | ||
126 | return 0; | |
127 | ||
128 | remove: | |
129 | drm_mm_remove_node(bo->mm); | |
130 | free: | |
131 | kfree(bo->mm); | |
132 | return err; | |
133 | } | |
134 | ||
135 | static int tegra_bo_iommu_unmap(struct tegra_drm *tegra, struct tegra_bo *bo) | |
136 | { | |
137 | if (!bo->mm) | |
138 | return 0; | |
139 | ||
140 | iommu_unmap(tegra->domain, bo->paddr, bo->size); | |
141 | drm_mm_remove_node(bo->mm); | |
142 | kfree(bo->mm); | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
c28d4a31 TR |
147 | static struct tegra_bo *tegra_bo_alloc_object(struct drm_device *drm, |
148 | size_t size) | |
149 | { | |
150 | struct tegra_bo *bo; | |
151 | int err; | |
152 | ||
153 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
154 | if (!bo) | |
155 | return ERR_PTR(-ENOMEM); | |
156 | ||
157 | host1x_bo_init(&bo->base, &tegra_bo_ops); | |
158 | size = round_up(size, PAGE_SIZE); | |
159 | ||
160 | err = drm_gem_object_init(drm, &bo->gem, size); | |
161 | if (err < 0) | |
162 | goto free; | |
163 | ||
164 | err = drm_gem_create_mmap_offset(&bo->gem); | |
165 | if (err < 0) | |
166 | goto release; | |
167 | ||
168 | return bo; | |
169 | ||
170 | release: | |
171 | drm_gem_object_release(&bo->gem); | |
172 | free: | |
173 | kfree(bo); | |
174 | return ERR_PTR(err); | |
175 | } | |
176 | ||
df06b759 | 177 | static void tegra_bo_free(struct drm_device *drm, struct tegra_bo *bo) |
de2ba664 | 178 | { |
df06b759 TR |
179 | if (bo->pages) { |
180 | drm_gem_put_pages(&bo->gem, bo->pages, true, true); | |
181 | sg_free_table(bo->sgt); | |
182 | kfree(bo->sgt); | |
7e0180e3 | 183 | } else if (bo->vaddr) { |
df06b759 TR |
184 | dma_free_writecombine(drm->dev, bo->gem.size, bo->vaddr, |
185 | bo->paddr); | |
186 | } | |
187 | } | |
188 | ||
73c42c79 | 189 | static int tegra_bo_get_pages(struct drm_device *drm, struct tegra_bo *bo) |
df06b759 | 190 | { |
a04251fc | 191 | struct scatterlist *s; |
a04251fc TR |
192 | unsigned int i; |
193 | ||
df06b759 TR |
194 | bo->pages = drm_gem_get_pages(&bo->gem); |
195 | if (IS_ERR(bo->pages)) | |
196 | return PTR_ERR(bo->pages); | |
197 | ||
73c42c79 | 198 | bo->num_pages = bo->gem.size >> PAGE_SHIFT; |
df06b759 | 199 | |
fd73caa5 TR |
200 | bo->sgt = drm_prime_pages_to_sg(bo->pages, bo->num_pages); |
201 | if (IS_ERR(bo->sgt)) | |
a04251fc TR |
202 | goto put_pages; |
203 | ||
204 | /* | |
fd73caa5 TR |
205 | * Fake up the SG table so that dma_sync_sg_for_device() can be used |
206 | * to flush the pages associated with it. | |
a04251fc TR |
207 | * |
208 | * TODO: Replace this by drm_clflash_sg() once it can be implemented | |
209 | * without relying on symbols that are not exported. | |
210 | */ | |
fd73caa5 | 211 | for_each_sg(bo->sgt->sgl, s, bo->sgt->nents, i) |
a04251fc TR |
212 | sg_dma_address(s) = sg_phys(s); |
213 | ||
fd73caa5 TR |
214 | dma_sync_sg_for_device(drm->dev, bo->sgt->sgl, bo->sgt->nents, |
215 | DMA_TO_DEVICE); | |
a04251fc | 216 | |
df06b759 | 217 | return 0; |
a04251fc | 218 | |
a04251fc TR |
219 | put_pages: |
220 | drm_gem_put_pages(&bo->gem, bo->pages, false, false); | |
fd73caa5 | 221 | return PTR_ERR(bo->sgt); |
df06b759 TR |
222 | } |
223 | ||
73c42c79 | 224 | static int tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo) |
df06b759 TR |
225 | { |
226 | struct tegra_drm *tegra = drm->dev_private; | |
227 | int err; | |
228 | ||
229 | if (tegra->domain) { | |
73c42c79 | 230 | err = tegra_bo_get_pages(drm, bo); |
df06b759 TR |
231 | if (err < 0) |
232 | return err; | |
233 | ||
234 | err = tegra_bo_iommu_map(tegra, bo); | |
235 | if (err < 0) { | |
236 | tegra_bo_free(drm, bo); | |
237 | return err; | |
238 | } | |
239 | } else { | |
73c42c79 TR |
240 | size_t size = bo->gem.size; |
241 | ||
df06b759 TR |
242 | bo->vaddr = dma_alloc_writecombine(drm->dev, size, &bo->paddr, |
243 | GFP_KERNEL | __GFP_NOWARN); | |
244 | if (!bo->vaddr) { | |
245 | dev_err(drm->dev, | |
246 | "failed to allocate buffer of size %zu\n", | |
247 | size); | |
248 | return -ENOMEM; | |
249 | } | |
250 | } | |
251 | ||
252 | return 0; | |
de2ba664 AM |
253 | } |
254 | ||
71c38629 | 255 | struct tegra_bo *tegra_bo_create(struct drm_device *drm, size_t size, |
773af77f | 256 | unsigned long flags) |
de2ba664 AM |
257 | { |
258 | struct tegra_bo *bo; | |
259 | int err; | |
260 | ||
c28d4a31 TR |
261 | bo = tegra_bo_alloc_object(drm, size); |
262 | if (IS_ERR(bo)) | |
263 | return bo; | |
de2ba664 | 264 | |
73c42c79 | 265 | err = tegra_bo_alloc(drm, bo); |
df06b759 TR |
266 | if (err < 0) |
267 | goto release; | |
de2ba664 | 268 | |
773af77f | 269 | if (flags & DRM_TEGRA_GEM_CREATE_TILED) |
c134f019 | 270 | bo->tiling.mode = TEGRA_BO_TILING_MODE_TILED; |
773af77f | 271 | |
db7fbdfd TR |
272 | if (flags & DRM_TEGRA_GEM_CREATE_BOTTOM_UP) |
273 | bo->flags |= TEGRA_BO_BOTTOM_UP; | |
274 | ||
de2ba664 AM |
275 | return bo; |
276 | ||
df06b759 TR |
277 | release: |
278 | drm_gem_object_release(&bo->gem); | |
de2ba664 | 279 | kfree(bo); |
de2ba664 | 280 | return ERR_PTR(err); |
de2ba664 AM |
281 | } |
282 | ||
283 | struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file, | |
3be82743 | 284 | struct drm_device *drm, |
71c38629 | 285 | size_t size, |
773af77f | 286 | unsigned long flags, |
71c38629 | 287 | u32 *handle) |
de2ba664 AM |
288 | { |
289 | struct tegra_bo *bo; | |
a8b48df5 | 290 | int err; |
de2ba664 | 291 | |
773af77f | 292 | bo = tegra_bo_create(drm, size, flags); |
de2ba664 AM |
293 | if (IS_ERR(bo)) |
294 | return bo; | |
295 | ||
a8b48df5 TR |
296 | err = drm_gem_handle_create(file, &bo->gem, handle); |
297 | if (err) { | |
298 | tegra_bo_free_object(&bo->gem); | |
299 | return ERR_PTR(err); | |
300 | } | |
de2ba664 AM |
301 | |
302 | drm_gem_object_unreference_unlocked(&bo->gem); | |
303 | ||
304 | return bo; | |
de2ba664 AM |
305 | } |
306 | ||
540457cc TR |
307 | static struct tegra_bo *tegra_bo_import(struct drm_device *drm, |
308 | struct dma_buf *buf) | |
3800391d | 309 | { |
df06b759 | 310 | struct tegra_drm *tegra = drm->dev_private; |
3800391d TR |
311 | struct dma_buf_attachment *attach; |
312 | struct tegra_bo *bo; | |
3800391d TR |
313 | int err; |
314 | ||
c28d4a31 TR |
315 | bo = tegra_bo_alloc_object(drm, buf->size); |
316 | if (IS_ERR(bo)) | |
317 | return bo; | |
3800391d TR |
318 | |
319 | attach = dma_buf_attach(buf, drm->dev); | |
320 | if (IS_ERR(attach)) { | |
321 | err = PTR_ERR(attach); | |
c28d4a31 | 322 | goto free; |
3800391d TR |
323 | } |
324 | ||
325 | get_dma_buf(buf); | |
326 | ||
327 | bo->sgt = dma_buf_map_attachment(attach, DMA_TO_DEVICE); | |
328 | if (!bo->sgt) { | |
329 | err = -ENOMEM; | |
330 | goto detach; | |
331 | } | |
332 | ||
333 | if (IS_ERR(bo->sgt)) { | |
334 | err = PTR_ERR(bo->sgt); | |
335 | goto detach; | |
336 | } | |
337 | ||
df06b759 TR |
338 | if (tegra->domain) { |
339 | err = tegra_bo_iommu_map(tegra, bo); | |
340 | if (err < 0) | |
341 | goto detach; | |
342 | } else { | |
343 | if (bo->sgt->nents > 1) { | |
344 | err = -EINVAL; | |
345 | goto detach; | |
346 | } | |
347 | ||
348 | bo->paddr = sg_dma_address(bo->sgt->sgl); | |
3800391d TR |
349 | } |
350 | ||
3800391d TR |
351 | bo->gem.import_attach = attach; |
352 | ||
353 | return bo; | |
354 | ||
355 | detach: | |
356 | if (!IS_ERR_OR_NULL(bo->sgt)) | |
357 | dma_buf_unmap_attachment(attach, bo->sgt, DMA_TO_DEVICE); | |
358 | ||
359 | dma_buf_detach(buf, attach); | |
360 | dma_buf_put(buf); | |
3800391d | 361 | free: |
c28d4a31 | 362 | drm_gem_object_release(&bo->gem); |
3800391d | 363 | kfree(bo); |
3800391d TR |
364 | return ERR_PTR(err); |
365 | } | |
366 | ||
de2ba664 AM |
367 | void tegra_bo_free_object(struct drm_gem_object *gem) |
368 | { | |
df06b759 | 369 | struct tegra_drm *tegra = gem->dev->dev_private; |
de2ba664 AM |
370 | struct tegra_bo *bo = to_tegra_bo(gem); |
371 | ||
df06b759 TR |
372 | if (tegra->domain) |
373 | tegra_bo_iommu_unmap(tegra, bo); | |
374 | ||
3800391d TR |
375 | if (gem->import_attach) { |
376 | dma_buf_unmap_attachment(gem->import_attach, bo->sgt, | |
377 | DMA_TO_DEVICE); | |
378 | drm_prime_gem_destroy(gem, NULL); | |
379 | } else { | |
df06b759 | 380 | tegra_bo_free(gem->dev, bo); |
3800391d TR |
381 | } |
382 | ||
de2ba664 | 383 | drm_gem_object_release(gem); |
de2ba664 AM |
384 | kfree(bo); |
385 | } | |
386 | ||
387 | int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm, | |
388 | struct drm_mode_create_dumb *args) | |
389 | { | |
dc6057ec | 390 | unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); |
d1f3e1e0 | 391 | struct tegra_drm *tegra = drm->dev_private; |
de2ba664 AM |
392 | struct tegra_bo *bo; |
393 | ||
dc6057ec TR |
394 | args->pitch = round_up(min_pitch, tegra->pitch_align); |
395 | args->size = args->pitch * args->height; | |
de2ba664 | 396 | |
773af77f | 397 | bo = tegra_bo_create_with_handle(file, drm, args->size, 0, |
3be82743 | 398 | &args->handle); |
de2ba664 AM |
399 | if (IS_ERR(bo)) |
400 | return PTR_ERR(bo); | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | int tegra_bo_dumb_map_offset(struct drm_file *file, struct drm_device *drm, | |
71c38629 | 406 | u32 handle, u64 *offset) |
de2ba664 AM |
407 | { |
408 | struct drm_gem_object *gem; | |
409 | struct tegra_bo *bo; | |
410 | ||
411 | mutex_lock(&drm->struct_mutex); | |
412 | ||
413 | gem = drm_gem_object_lookup(drm, file, handle); | |
414 | if (!gem) { | |
415 | dev_err(drm->dev, "failed to lookup GEM object\n"); | |
416 | mutex_unlock(&drm->struct_mutex); | |
417 | return -EINVAL; | |
418 | } | |
419 | ||
420 | bo = to_tegra_bo(gem); | |
421 | ||
2bc7b0ca | 422 | *offset = drm_vma_node_offset_addr(&bo->gem.vma_node); |
de2ba664 AM |
423 | |
424 | drm_gem_object_unreference(gem); | |
425 | ||
426 | mutex_unlock(&drm->struct_mutex); | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
df06b759 TR |
431 | static int tegra_bo_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
432 | { | |
433 | struct drm_gem_object *gem = vma->vm_private_data; | |
434 | struct tegra_bo *bo = to_tegra_bo(gem); | |
435 | struct page *page; | |
436 | pgoff_t offset; | |
437 | int err; | |
438 | ||
439 | if (!bo->pages) | |
440 | return VM_FAULT_SIGBUS; | |
441 | ||
442 | offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> PAGE_SHIFT; | |
443 | page = bo->pages[offset]; | |
444 | ||
445 | err = vm_insert_page(vma, (unsigned long)vmf->virtual_address, page); | |
446 | switch (err) { | |
447 | case -EAGAIN: | |
448 | case 0: | |
449 | case -ERESTARTSYS: | |
450 | case -EINTR: | |
451 | case -EBUSY: | |
452 | return VM_FAULT_NOPAGE; | |
453 | ||
454 | case -ENOMEM: | |
455 | return VM_FAULT_OOM; | |
456 | } | |
457 | ||
458 | return VM_FAULT_SIGBUS; | |
459 | } | |
460 | ||
de2ba664 | 461 | const struct vm_operations_struct tegra_bo_vm_ops = { |
df06b759 | 462 | .fault = tegra_bo_fault, |
de2ba664 AM |
463 | .open = drm_gem_vm_open, |
464 | .close = drm_gem_vm_close, | |
465 | }; | |
466 | ||
467 | int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma) | |
468 | { | |
469 | struct drm_gem_object *gem; | |
470 | struct tegra_bo *bo; | |
471 | int ret; | |
472 | ||
473 | ret = drm_gem_mmap(file, vma); | |
474 | if (ret) | |
475 | return ret; | |
476 | ||
477 | gem = vma->vm_private_data; | |
478 | bo = to_tegra_bo(gem); | |
479 | ||
df06b759 TR |
480 | if (!bo->pages) { |
481 | unsigned long vm_pgoff = vma->vm_pgoff; | |
53ea7213 | 482 | |
df06b759 TR |
483 | vma->vm_flags &= ~VM_PFNMAP; |
484 | vma->vm_pgoff = 0; | |
485 | ||
486 | ret = dma_mmap_writecombine(gem->dev->dev, vma, bo->vaddr, | |
487 | bo->paddr, gem->size); | |
488 | if (ret) { | |
489 | drm_gem_vm_close(vma); | |
490 | return ret; | |
491 | } | |
492 | ||
493 | vma->vm_pgoff = vm_pgoff; | |
494 | } else { | |
495 | pgprot_t prot = vm_get_page_prot(vma->vm_flags); | |
53ea7213 | 496 | |
df06b759 TR |
497 | vma->vm_flags |= VM_MIXEDMAP; |
498 | vma->vm_flags &= ~VM_PFNMAP; | |
499 | ||
500 | vma->vm_page_prot = pgprot_writecombine(prot); | |
501 | } | |
de2ba664 | 502 | |
53ea7213 | 503 | return 0; |
de2ba664 | 504 | } |
3800391d TR |
505 | |
506 | static struct sg_table * | |
507 | tegra_gem_prime_map_dma_buf(struct dma_buf_attachment *attach, | |
508 | enum dma_data_direction dir) | |
509 | { | |
510 | struct drm_gem_object *gem = attach->dmabuf->priv; | |
511 | struct tegra_bo *bo = to_tegra_bo(gem); | |
512 | struct sg_table *sgt; | |
513 | ||
514 | sgt = kmalloc(sizeof(*sgt), GFP_KERNEL); | |
515 | if (!sgt) | |
516 | return NULL; | |
517 | ||
df06b759 TR |
518 | if (bo->pages) { |
519 | struct scatterlist *sg; | |
520 | unsigned int i; | |
521 | ||
522 | if (sg_alloc_table(sgt, bo->num_pages, GFP_KERNEL)) | |
523 | goto free; | |
3800391d | 524 | |
df06b759 TR |
525 | for_each_sg(sgt->sgl, sg, bo->num_pages, i) |
526 | sg_set_page(sg, bo->pages[i], PAGE_SIZE, 0); | |
527 | ||
528 | if (dma_map_sg(attach->dev, sgt->sgl, sgt->nents, dir) == 0) | |
529 | goto free; | |
530 | } else { | |
531 | if (sg_alloc_table(sgt, 1, GFP_KERNEL)) | |
532 | goto free; | |
533 | ||
534 | sg_dma_address(sgt->sgl) = bo->paddr; | |
535 | sg_dma_len(sgt->sgl) = gem->size; | |
536 | } | |
3800391d TR |
537 | |
538 | return sgt; | |
df06b759 TR |
539 | |
540 | free: | |
541 | sg_free_table(sgt); | |
542 | kfree(sgt); | |
543 | return NULL; | |
3800391d TR |
544 | } |
545 | ||
546 | static void tegra_gem_prime_unmap_dma_buf(struct dma_buf_attachment *attach, | |
547 | struct sg_table *sgt, | |
548 | enum dma_data_direction dir) | |
549 | { | |
df06b759 TR |
550 | struct drm_gem_object *gem = attach->dmabuf->priv; |
551 | struct tegra_bo *bo = to_tegra_bo(gem); | |
552 | ||
553 | if (bo->pages) | |
554 | dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir); | |
555 | ||
3800391d TR |
556 | sg_free_table(sgt); |
557 | kfree(sgt); | |
558 | } | |
559 | ||
560 | static void tegra_gem_prime_release(struct dma_buf *buf) | |
561 | { | |
562 | drm_gem_dmabuf_release(buf); | |
563 | } | |
564 | ||
565 | static void *tegra_gem_prime_kmap_atomic(struct dma_buf *buf, | |
566 | unsigned long page) | |
567 | { | |
568 | return NULL; | |
569 | } | |
570 | ||
571 | static void tegra_gem_prime_kunmap_atomic(struct dma_buf *buf, | |
572 | unsigned long page, | |
573 | void *addr) | |
574 | { | |
575 | } | |
576 | ||
577 | static void *tegra_gem_prime_kmap(struct dma_buf *buf, unsigned long page) | |
578 | { | |
579 | return NULL; | |
580 | } | |
581 | ||
582 | static void tegra_gem_prime_kunmap(struct dma_buf *buf, unsigned long page, | |
583 | void *addr) | |
584 | { | |
585 | } | |
586 | ||
587 | static int tegra_gem_prime_mmap(struct dma_buf *buf, struct vm_area_struct *vma) | |
588 | { | |
589 | return -EINVAL; | |
590 | } | |
591 | ||
d40326f4 TR |
592 | static void *tegra_gem_prime_vmap(struct dma_buf *buf) |
593 | { | |
594 | struct drm_gem_object *gem = buf->priv; | |
595 | struct tegra_bo *bo = to_tegra_bo(gem); | |
596 | ||
597 | return bo->vaddr; | |
598 | } | |
599 | ||
600 | static void tegra_gem_prime_vunmap(struct dma_buf *buf, void *vaddr) | |
601 | { | |
602 | } | |
603 | ||
3800391d TR |
604 | static const struct dma_buf_ops tegra_gem_prime_dmabuf_ops = { |
605 | .map_dma_buf = tegra_gem_prime_map_dma_buf, | |
606 | .unmap_dma_buf = tegra_gem_prime_unmap_dma_buf, | |
607 | .release = tegra_gem_prime_release, | |
608 | .kmap_atomic = tegra_gem_prime_kmap_atomic, | |
609 | .kunmap_atomic = tegra_gem_prime_kunmap_atomic, | |
610 | .kmap = tegra_gem_prime_kmap, | |
611 | .kunmap = tegra_gem_prime_kunmap, | |
612 | .mmap = tegra_gem_prime_mmap, | |
d40326f4 TR |
613 | .vmap = tegra_gem_prime_vmap, |
614 | .vunmap = tegra_gem_prime_vunmap, | |
3800391d TR |
615 | }; |
616 | ||
617 | struct dma_buf *tegra_gem_prime_export(struct drm_device *drm, | |
618 | struct drm_gem_object *gem, | |
619 | int flags) | |
620 | { | |
d8fbe341 SS |
621 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); |
622 | ||
623 | exp_info.ops = &tegra_gem_prime_dmabuf_ops; | |
624 | exp_info.size = gem->size; | |
625 | exp_info.flags = flags; | |
626 | exp_info.priv = gem; | |
627 | ||
628 | return dma_buf_export(&exp_info); | |
3800391d TR |
629 | } |
630 | ||
631 | struct drm_gem_object *tegra_gem_prime_import(struct drm_device *drm, | |
632 | struct dma_buf *buf) | |
633 | { | |
634 | struct tegra_bo *bo; | |
635 | ||
636 | if (buf->ops == &tegra_gem_prime_dmabuf_ops) { | |
637 | struct drm_gem_object *gem = buf->priv; | |
638 | ||
639 | if (gem->dev == drm) { | |
640 | drm_gem_object_reference(gem); | |
641 | return gem; | |
642 | } | |
643 | } | |
644 | ||
645 | bo = tegra_bo_import(drm, buf); | |
646 | if (IS_ERR(bo)) | |
647 | return ERR_CAST(bo); | |
648 | ||
649 | return &bo->gem; | |
650 | } |