Commit | Line | Data |
---|---|---|
1c248b7d ID |
1 | /* exynos_drm_gem.c |
2 | * | |
3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
4 | * Author: Inki Dae <inki.dae@samsung.com> | |
5 | * | |
d81aecb5 ID |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
1c248b7d ID |
10 | */ |
11 | ||
760285e7 | 12 | #include <drm/drmP.h> |
0de23977 | 13 | #include <drm/drm_vma_manager.h> |
1c248b7d | 14 | |
2b35892e | 15 | #include <linux/shmem_fs.h> |
1c248b7d ID |
16 | #include <drm/exynos_drm.h> |
17 | ||
18 | #include "exynos_drm_drv.h" | |
19 | #include "exynos_drm_gem.h" | |
20 | #include "exynos_drm_buf.h" | |
21 | ||
22 | static unsigned int convert_to_vm_err_msg(int msg) | |
23 | { | |
24 | unsigned int out_msg; | |
25 | ||
26 | switch (msg) { | |
27 | case 0: | |
28 | case -ERESTARTSYS: | |
29 | case -EINTR: | |
30 | out_msg = VM_FAULT_NOPAGE; | |
31 | break; | |
32 | ||
33 | case -ENOMEM: | |
34 | out_msg = VM_FAULT_OOM; | |
35 | break; | |
36 | ||
37 | default: | |
38 | out_msg = VM_FAULT_SIGBUS; | |
39 | break; | |
40 | } | |
41 | ||
42 | return out_msg; | |
43 | } | |
44 | ||
dcf9af82 | 45 | static int check_gem_flags(unsigned int flags) |
2b35892e | 46 | { |
dcf9af82 ID |
47 | if (flags & ~(EXYNOS_BO_MASK)) { |
48 | DRM_ERROR("invalid flags.\n"); | |
49 | return -EINVAL; | |
50 | } | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
c01d73fa ID |
55 | static void update_vm_cache_attr(struct exynos_drm_gem_obj *obj, |
56 | struct vm_area_struct *vma) | |
57 | { | |
58 | DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags); | |
59 | ||
60 | /* non-cachable as default. */ | |
61 | if (obj->flags & EXYNOS_BO_CACHABLE) | |
62 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
63 | else if (obj->flags & EXYNOS_BO_WC) | |
64 | vma->vm_page_prot = | |
65 | pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
66 | else | |
67 | vma->vm_page_prot = | |
68 | pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
69 | } | |
70 | ||
dcf9af82 ID |
71 | static unsigned long roundup_gem_size(unsigned long size, unsigned int flags) |
72 | { | |
0519f9a1 | 73 | /* TODO */ |
2b35892e | 74 | |
0519f9a1 | 75 | return roundup(size, PAGE_SIZE); |
2b35892e ID |
76 | } |
77 | ||
0519f9a1 | 78 | static int exynos_drm_gem_map_buf(struct drm_gem_object *obj, |
2b35892e ID |
79 | struct vm_area_struct *vma, |
80 | unsigned long f_vaddr, | |
81 | pgoff_t page_offset) | |
82 | { | |
83 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); | |
84 | struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; | |
4ddc404b | 85 | struct scatterlist *sgl; |
2b35892e | 86 | unsigned long pfn; |
4ddc404b | 87 | int i; |
2b35892e | 88 | |
465ed660 P |
89 | if (!buf->sgt) |
90 | return -EINTR; | |
91 | ||
92 | if (page_offset >= (buf->size >> PAGE_SHIFT)) { | |
93 | DRM_ERROR("invalid page offset\n"); | |
94 | return -EINVAL; | |
4ddc404b | 95 | } |
2b35892e | 96 | |
465ed660 P |
97 | sgl = buf->sgt->sgl; |
98 | for_each_sg(buf->sgt->sgl, sgl, buf->sgt->nents, i) { | |
99 | if (page_offset < (sgl->length >> PAGE_SHIFT)) | |
100 | break; | |
101 | page_offset -= (sgl->length >> PAGE_SHIFT); | |
102 | } | |
103 | ||
104 | pfn = __phys_to_pfn(sg_phys(sgl)) + page_offset; | |
105 | ||
2b35892e ID |
106 | return vm_insert_mixed(vma, f_vaddr, pfn); |
107 | } | |
108 | ||
2364839a JS |
109 | static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, |
110 | struct drm_file *file_priv, | |
111 | unsigned int *handle) | |
1c248b7d | 112 | { |
1c248b7d ID |
113 | int ret; |
114 | ||
1c248b7d ID |
115 | /* |
116 | * allocate a id of idr table where the obj is registered | |
117 | * and handle has the id what user can see. | |
118 | */ | |
119 | ret = drm_gem_handle_create(file_priv, obj, handle); | |
120 | if (ret) | |
2364839a | 121 | return ret; |
1c248b7d ID |
122 | |
123 | DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); | |
124 | ||
125 | /* drop reference from allocate - handle holds it now. */ | |
126 | drm_gem_object_unreference_unlocked(obj); | |
127 | ||
2364839a JS |
128 | return 0; |
129 | } | |
130 | ||
131 | void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) | |
132 | { | |
133 | struct drm_gem_object *obj; | |
c01d73fa | 134 | struct exynos_drm_gem_buf *buf; |
2364839a | 135 | |
2364839a | 136 | obj = &exynos_gem_obj->base; |
c01d73fa | 137 | buf = exynos_gem_obj->buffer; |
2364839a | 138 | |
a8e11d1c | 139 | DRM_DEBUG_KMS("handle count = %d\n", obj->handle_count); |
1c248b7d | 140 | |
c374e731 ID |
141 | /* |
142 | * do not release memory region from exporter. | |
143 | * | |
144 | * the region will be released by exporter | |
145 | * once dmabuf's refcount becomes 0. | |
146 | */ | |
147 | if (obj->import_attach) | |
148 | goto out; | |
149 | ||
0519f9a1 | 150 | exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf); |
2b35892e | 151 | |
c374e731 | 152 | out: |
c01d73fa | 153 | exynos_drm_fini_buf(obj->dev, buf); |
2b35892e | 154 | exynos_gem_obj->buffer = NULL; |
2364839a | 155 | |
0de23977 | 156 | drm_gem_free_mmap_offset(obj); |
2364839a JS |
157 | |
158 | /* release file pointer to gem object. */ | |
1c248b7d ID |
159 | drm_gem_object_release(obj); |
160 | ||
1c248b7d | 161 | kfree(exynos_gem_obj); |
2b35892e | 162 | exynos_gem_obj = NULL; |
2364839a JS |
163 | } |
164 | ||
a4f19aaa ID |
165 | unsigned long exynos_drm_gem_get_size(struct drm_device *dev, |
166 | unsigned int gem_handle, | |
167 | struct drm_file *file_priv) | |
168 | { | |
169 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
170 | struct drm_gem_object *obj; | |
171 | ||
172 | obj = drm_gem_object_lookup(dev, file_priv, gem_handle); | |
173 | if (!obj) { | |
174 | DRM_ERROR("failed to lookup gem object.\n"); | |
175 | return 0; | |
176 | } | |
177 | ||
178 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
179 | ||
180 | drm_gem_object_unreference_unlocked(obj); | |
181 | ||
182 | return exynos_gem_obj->buffer->size; | |
183 | } | |
184 | ||
185 | ||
b2df26c1 | 186 | struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, |
2364839a JS |
187 | unsigned long size) |
188 | { | |
189 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
190 | struct drm_gem_object *obj; | |
191 | int ret; | |
192 | ||
193 | exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); | |
194 | if (!exynos_gem_obj) { | |
195 | DRM_ERROR("failed to allocate exynos gem object\n"); | |
196 | return NULL; | |
197 | } | |
198 | ||
2b35892e | 199 | exynos_gem_obj->size = size; |
2364839a JS |
200 | obj = &exynos_gem_obj->base; |
201 | ||
202 | ret = drm_gem_object_init(dev, obj, size); | |
203 | if (ret < 0) { | |
204 | DRM_ERROR("failed to initialize gem object\n"); | |
205 | kfree(exynos_gem_obj); | |
206 | return NULL; | |
207 | } | |
208 | ||
209 | DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); | |
210 | ||
211 | return exynos_gem_obj; | |
1c248b7d ID |
212 | } |
213 | ||
f088d5a9 | 214 | struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, |
2b35892e ID |
215 | unsigned int flags, |
216 | unsigned long size) | |
f088d5a9 | 217 | { |
2364839a | 218 | struct exynos_drm_gem_obj *exynos_gem_obj; |
2b35892e ID |
219 | struct exynos_drm_gem_buf *buf; |
220 | int ret; | |
f088d5a9 | 221 | |
dcf9af82 ID |
222 | if (!size) { |
223 | DRM_ERROR("invalid size.\n"); | |
224 | return ERR_PTR(-EINVAL); | |
225 | } | |
226 | ||
227 | size = roundup_gem_size(size, flags); | |
f088d5a9 | 228 | |
dcf9af82 ID |
229 | ret = check_gem_flags(flags); |
230 | if (ret) | |
231 | return ERR_PTR(ret); | |
2b35892e ID |
232 | |
233 | buf = exynos_drm_init_buf(dev, size); | |
234 | if (!buf) | |
ee5e770e | 235 | return ERR_PTR(-ENOMEM); |
f088d5a9 | 236 | |
2364839a JS |
237 | exynos_gem_obj = exynos_drm_gem_init(dev, size); |
238 | if (!exynos_gem_obj) { | |
2b35892e | 239 | ret = -ENOMEM; |
dcf9af82 | 240 | goto err_fini_buf; |
f088d5a9 ID |
241 | } |
242 | ||
2b35892e ID |
243 | exynos_gem_obj->buffer = buf; |
244 | ||
245 | /* set memory type and cache attribute from user side. */ | |
246 | exynos_gem_obj->flags = flags; | |
247 | ||
0519f9a1 | 248 | ret = exynos_drm_alloc_buf(dev, buf, flags); |
c58c1599 YC |
249 | if (ret < 0) |
250 | goto err_gem_fini; | |
f088d5a9 ID |
251 | |
252 | return exynos_gem_obj; | |
dcf9af82 | 253 | |
c58c1599 YC |
254 | err_gem_fini: |
255 | drm_gem_object_release(&exynos_gem_obj->base); | |
256 | kfree(exynos_gem_obj); | |
dcf9af82 | 257 | err_fini_buf: |
2b35892e ID |
258 | exynos_drm_fini_buf(dev, buf); |
259 | return ERR_PTR(ret); | |
f088d5a9 ID |
260 | } |
261 | ||
1c248b7d | 262 | int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, |
ee5e770e | 263 | struct drm_file *file_priv) |
1c248b7d ID |
264 | { |
265 | struct drm_exynos_gem_create *args = data; | |
ee5e770e | 266 | struct exynos_drm_gem_obj *exynos_gem_obj; |
2364839a | 267 | int ret; |
1c248b7d | 268 | |
2b35892e | 269 | exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
1c248b7d ID |
270 | if (IS_ERR(exynos_gem_obj)) |
271 | return PTR_ERR(exynos_gem_obj); | |
272 | ||
2364839a JS |
273 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
274 | &args->handle); | |
275 | if (ret) { | |
276 | exynos_drm_gem_destroy(exynos_gem_obj); | |
277 | return ret; | |
278 | } | |
279 | ||
1c248b7d ID |
280 | return 0; |
281 | } | |
282 | ||
d87342c1 | 283 | dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, |
f0b1bda7 | 284 | unsigned int gem_handle, |
d87342c1 | 285 | struct drm_file *filp) |
f0b1bda7 ID |
286 | { |
287 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
288 | struct drm_gem_object *obj; | |
289 | ||
d87342c1 | 290 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
f0b1bda7 ID |
291 | if (!obj) { |
292 | DRM_ERROR("failed to lookup gem object.\n"); | |
293 | return ERR_PTR(-EINVAL); | |
294 | } | |
295 | ||
296 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
297 | ||
f0b1bda7 ID |
298 | return &exynos_gem_obj->buffer->dma_addr; |
299 | } | |
300 | ||
301 | void exynos_drm_gem_put_dma_addr(struct drm_device *dev, | |
302 | unsigned int gem_handle, | |
d87342c1 | 303 | struct drm_file *filp) |
f0b1bda7 ID |
304 | { |
305 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
306 | struct drm_gem_object *obj; | |
307 | ||
d87342c1 | 308 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
f0b1bda7 ID |
309 | if (!obj) { |
310 | DRM_ERROR("failed to lookup gem object.\n"); | |
311 | return; | |
312 | } | |
313 | ||
314 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
315 | ||
f0b1bda7 ID |
316 | drm_gem_object_unreference_unlocked(obj); |
317 | ||
318 | /* | |
319 | * decrease obj->refcount one more time because we has already | |
320 | * increased it at exynos_drm_gem_get_dma_addr(). | |
321 | */ | |
322 | drm_gem_object_unreference_unlocked(obj); | |
323 | } | |
324 | ||
1c248b7d | 325 | int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, |
ee5e770e | 326 | struct drm_file *file_priv) |
1c248b7d ID |
327 | { |
328 | struct drm_exynos_gem_map_off *args = data; | |
329 | ||
1c248b7d ID |
330 | DRM_DEBUG_KMS("handle = 0x%x, offset = 0x%lx\n", |
331 | args->handle, (unsigned long)args->offset); | |
332 | ||
333 | if (!(dev->driver->driver_features & DRIVER_GEM)) { | |
334 | DRM_ERROR("does not support GEM.\n"); | |
335 | return -ENODEV; | |
336 | } | |
337 | ||
338 | return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle, | |
339 | &args->offset); | |
340 | } | |
341 | ||
5b07c660 ID |
342 | static struct drm_file *exynos_drm_find_drm_file(struct drm_device *drm_dev, |
343 | struct file *filp) | |
344 | { | |
345 | struct drm_file *file_priv; | |
346 | ||
5b07c660 | 347 | /* find current process's drm_file from filelist. */ |
5af9f116 YC |
348 | list_for_each_entry(file_priv, &drm_dev->filelist, lhead) |
349 | if (file_priv->filp == filp) | |
5b07c660 | 350 | return file_priv; |
5b07c660 | 351 | |
5b07c660 ID |
352 | WARN_ON(1); |
353 | ||
354 | return ERR_PTR(-EFAULT); | |
355 | } | |
356 | ||
1c248b7d | 357 | static int exynos_drm_gem_mmap_buffer(struct file *filp, |
ee5e770e | 358 | struct vm_area_struct *vma) |
1c248b7d ID |
359 | { |
360 | struct drm_gem_object *obj = filp->private_data; | |
361 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); | |
5b07c660 | 362 | struct drm_device *drm_dev = obj->dev; |
2c871127 | 363 | struct exynos_drm_gem_buf *buffer; |
5b07c660 | 364 | struct drm_file *file_priv; |
0519f9a1 | 365 | unsigned long vm_size; |
5b07c660 | 366 | int ret; |
1c248b7d | 367 | |
314e51b9 | 368 | vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; |
5b07c660 ID |
369 | vma->vm_private_data = obj; |
370 | vma->vm_ops = drm_dev->driver->gem_vm_ops; | |
371 | ||
372 | /* restore it to driver's fops. */ | |
373 | filp->f_op = fops_get(drm_dev->driver->fops); | |
374 | ||
375 | file_priv = exynos_drm_find_drm_file(drm_dev, filp); | |
376 | if (IS_ERR(file_priv)) | |
377 | return PTR_ERR(file_priv); | |
378 | ||
379 | /* restore it to drm_file. */ | |
380 | filp->private_data = file_priv; | |
1c248b7d | 381 | |
c01d73fa | 382 | update_vm_cache_attr(exynos_gem_obj, vma); |
1c248b7d | 383 | |
0519f9a1 | 384 | vm_size = vma->vm_end - vma->vm_start; |
2b35892e | 385 | |
1c248b7d | 386 | /* |
2c871127 | 387 | * a buffer contains information to physically continuous memory |
1c248b7d ID |
388 | * allocated by user request or at framebuffer creation. |
389 | */ | |
2c871127 | 390 | buffer = exynos_gem_obj->buffer; |
1c248b7d ID |
391 | |
392 | /* check if user-requested size is valid. */ | |
2c871127 | 393 | if (vm_size > buffer->size) |
1c248b7d ID |
394 | return -EINVAL; |
395 | ||
4744ad24 | 396 | ret = dma_mmap_attrs(drm_dev->dev, vma, buffer->pages, |
0519f9a1 ID |
397 | buffer->dma_addr, buffer->size, |
398 | &buffer->dma_attrs); | |
5b07c660 ID |
399 | if (ret < 0) { |
400 | DRM_ERROR("failed to mmap.\n"); | |
401 | return ret; | |
402 | } | |
403 | ||
404 | /* | |
405 | * take a reference to this mapping of the object. And this reference | |
406 | * is unreferenced by the corresponding vm_close call. | |
407 | */ | |
408 | drm_gem_object_reference(obj); | |
409 | ||
5b07c660 | 410 | drm_vm_open_locked(drm_dev, vma); |
5b07c660 ID |
411 | |
412 | return 0; | |
1c248b7d ID |
413 | } |
414 | ||
415 | static const struct file_operations exynos_drm_gem_fops = { | |
416 | .mmap = exynos_drm_gem_mmap_buffer, | |
417 | }; | |
418 | ||
419 | int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
ee5e770e | 420 | struct drm_file *file_priv) |
1c248b7d ID |
421 | { |
422 | struct drm_exynos_gem_mmap *args = data; | |
423 | struct drm_gem_object *obj; | |
23f340e0 | 424 | unsigned long addr; |
1c248b7d | 425 | |
1c248b7d ID |
426 | if (!(dev->driver->driver_features & DRIVER_GEM)) { |
427 | DRM_ERROR("does not support GEM.\n"); | |
428 | return -ENODEV; | |
429 | } | |
430 | ||
431 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
432 | if (!obj) { | |
433 | DRM_ERROR("failed to lookup gem object.\n"); | |
434 | return -EINVAL; | |
435 | } | |
436 | ||
5af9f116 YC |
437 | /* |
438 | * We have to use gem object and its fops for specific mmaper, | |
439 | * but vm_mmap() can deliver only filp. So we have to change | |
440 | * filp->f_op and filp->private_data temporarily, then restore | |
441 | * again. So it is important to keep lock until restoration the | |
442 | * settings to prevent others from misuse of filp->f_op or | |
443 | * filp->private_data. | |
444 | */ | |
445 | mutex_lock(&dev->struct_mutex); | |
446 | ||
5b07c660 ID |
447 | /* |
448 | * Set specific mmper's fops. And it will be restored by | |
449 | * exynos_drm_gem_mmap_buffer to dev->driver->fops. | |
450 | * This is used to call specific mapper temporarily. | |
451 | */ | |
452 | file_priv->filp->f_op = &exynos_drm_gem_fops; | |
1c248b7d | 453 | |
5b07c660 ID |
454 | /* |
455 | * Set gem object to private_data so that specific mmaper | |
456 | * can get the gem object. And it will be restored by | |
457 | * exynos_drm_gem_mmap_buffer to drm_file. | |
458 | */ | |
459 | file_priv->filp->private_data = obj; | |
460 | ||
461 | addr = vm_mmap(file_priv->filp, 0, args->size, | |
1c248b7d | 462 | PROT_READ | PROT_WRITE, MAP_SHARED, 0); |
1c248b7d | 463 | |
5af9f116 | 464 | drm_gem_object_unreference(obj); |
1c248b7d | 465 | |
23f340e0 | 466 | if (IS_ERR_VALUE(addr)) { |
5af9f116 YC |
467 | /* check filp->f_op, filp->private_data are restored */ |
468 | if (file_priv->filp->f_op == &exynos_drm_gem_fops) { | |
469 | file_priv->filp->f_op = fops_get(dev->driver->fops); | |
470 | file_priv->filp->private_data = file_priv; | |
471 | } | |
472 | mutex_unlock(&dev->struct_mutex); | |
23f340e0 | 473 | return (int)addr; |
5b07c660 | 474 | } |
1c248b7d | 475 | |
5af9f116 YC |
476 | mutex_unlock(&dev->struct_mutex); |
477 | ||
1c248b7d ID |
478 | args->mapped = addr; |
479 | ||
480 | DRM_DEBUG_KMS("mapped = 0x%lx\n", (unsigned long)args->mapped); | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
40cd7e0c ID |
485 | int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, |
486 | struct drm_file *file_priv) | |
487 | { struct exynos_drm_gem_obj *exynos_gem_obj; | |
488 | struct drm_exynos_gem_info *args = data; | |
489 | struct drm_gem_object *obj; | |
490 | ||
491 | mutex_lock(&dev->struct_mutex); | |
492 | ||
493 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
494 | if (!obj) { | |
495 | DRM_ERROR("failed to lookup gem object.\n"); | |
496 | mutex_unlock(&dev->struct_mutex); | |
497 | return -EINVAL; | |
498 | } | |
499 | ||
500 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
501 | ||
502 | args->flags = exynos_gem_obj->flags; | |
503 | args->size = exynos_gem_obj->size; | |
504 | ||
505 | drm_gem_object_unreference(obj); | |
506 | mutex_unlock(&dev->struct_mutex); | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
2a3098ff ID |
511 | struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma) |
512 | { | |
513 | struct vm_area_struct *vma_copy; | |
514 | ||
515 | vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL); | |
516 | if (!vma_copy) | |
517 | return NULL; | |
518 | ||
519 | if (vma->vm_ops && vma->vm_ops->open) | |
520 | vma->vm_ops->open(vma); | |
521 | ||
522 | if (vma->vm_file) | |
523 | get_file(vma->vm_file); | |
524 | ||
525 | memcpy(vma_copy, vma, sizeof(*vma)); | |
526 | ||
527 | vma_copy->vm_mm = NULL; | |
528 | vma_copy->vm_next = NULL; | |
529 | vma_copy->vm_prev = NULL; | |
530 | ||
531 | return vma_copy; | |
532 | } | |
533 | ||
534 | void exynos_gem_put_vma(struct vm_area_struct *vma) | |
535 | { | |
536 | if (!vma) | |
537 | return; | |
538 | ||
539 | if (vma->vm_ops && vma->vm_ops->close) | |
540 | vma->vm_ops->close(vma); | |
541 | ||
542 | if (vma->vm_file) | |
543 | fput(vma->vm_file); | |
544 | ||
545 | kfree(vma); | |
546 | } | |
547 | ||
548 | int exynos_gem_get_pages_from_userptr(unsigned long start, | |
549 | unsigned int npages, | |
550 | struct page **pages, | |
551 | struct vm_area_struct *vma) | |
552 | { | |
553 | int get_npages; | |
554 | ||
555 | /* the memory region mmaped with VM_PFNMAP. */ | |
556 | if (vma_is_io(vma)) { | |
557 | unsigned int i; | |
558 | ||
559 | for (i = 0; i < npages; ++i, start += PAGE_SIZE) { | |
560 | unsigned long pfn; | |
561 | int ret = follow_pfn(vma, start, &pfn); | |
562 | if (ret) | |
563 | return ret; | |
564 | ||
565 | pages[i] = pfn_to_page(pfn); | |
566 | } | |
567 | ||
568 | if (i != npages) { | |
569 | DRM_ERROR("failed to get user_pages.\n"); | |
570 | return -EINVAL; | |
571 | } | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | get_npages = get_user_pages(current, current->mm, start, | |
577 | npages, 1, 1, pages, NULL); | |
578 | get_npages = max(get_npages, 0); | |
579 | if (get_npages != npages) { | |
580 | DRM_ERROR("failed to get user_pages.\n"); | |
581 | while (get_npages) | |
582 | put_page(pages[--get_npages]); | |
583 | return -EFAULT; | |
584 | } | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
589 | void exynos_gem_put_pages_to_userptr(struct page **pages, | |
590 | unsigned int npages, | |
591 | struct vm_area_struct *vma) | |
592 | { | |
593 | if (!vma_is_io(vma)) { | |
594 | unsigned int i; | |
595 | ||
596 | for (i = 0; i < npages; i++) { | |
597 | set_page_dirty_lock(pages[i]); | |
598 | ||
599 | /* | |
600 | * undo the reference we took when populating | |
601 | * the table. | |
602 | */ | |
603 | put_page(pages[i]); | |
604 | } | |
605 | } | |
606 | } | |
607 | ||
608 | int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, | |
609 | struct sg_table *sgt, | |
610 | enum dma_data_direction dir) | |
611 | { | |
612 | int nents; | |
613 | ||
614 | mutex_lock(&drm_dev->struct_mutex); | |
615 | ||
616 | nents = dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); | |
617 | if (!nents) { | |
618 | DRM_ERROR("failed to map sgl with dma.\n"); | |
619 | mutex_unlock(&drm_dev->struct_mutex); | |
620 | return nents; | |
621 | } | |
622 | ||
623 | mutex_unlock(&drm_dev->struct_mutex); | |
624 | return 0; | |
625 | } | |
626 | ||
627 | void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, | |
628 | struct sg_table *sgt, | |
629 | enum dma_data_direction dir) | |
630 | { | |
631 | dma_unmap_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); | |
632 | } | |
633 | ||
1c248b7d ID |
634 | int exynos_drm_gem_init_object(struct drm_gem_object *obj) |
635 | { | |
1c248b7d ID |
636 | return 0; |
637 | } | |
638 | ||
ee5e770e | 639 | void exynos_drm_gem_free_object(struct drm_gem_object *obj) |
1c248b7d | 640 | { |
b2df26c1 ID |
641 | struct exynos_drm_gem_obj *exynos_gem_obj; |
642 | struct exynos_drm_gem_buf *buf; | |
643 | ||
b2df26c1 ID |
644 | exynos_gem_obj = to_exynos_gem_obj(obj); |
645 | buf = exynos_gem_obj->buffer; | |
646 | ||
647 | if (obj->import_attach) | |
648 | drm_prime_gem_destroy(obj, buf->sgt); | |
649 | ||
2364839a | 650 | exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); |
1c248b7d ID |
651 | } |
652 | ||
653 | int exynos_drm_gem_dumb_create(struct drm_file *file_priv, | |
ee5e770e JS |
654 | struct drm_device *dev, |
655 | struct drm_mode_create_dumb *args) | |
1c248b7d ID |
656 | { |
657 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
2364839a | 658 | int ret; |
1c248b7d | 659 | |
1c248b7d ID |
660 | /* |
661 | * alocate memory to be used for framebuffer. | |
662 | * - this callback would be called by user application | |
663 | * with DRM_IOCTL_MODE_CREATE_DUMB command. | |
664 | */ | |
665 | ||
3fd6b694 | 666 | args->pitch = args->width * ((args->bpp + 7) / 8); |
7da5907c | 667 | args->size = args->pitch * args->height; |
1c248b7d | 668 | |
69961d8f ID |
669 | exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG | |
670 | EXYNOS_BO_WC, args->size); | |
1c248b7d ID |
671 | if (IS_ERR(exynos_gem_obj)) |
672 | return PTR_ERR(exynos_gem_obj); | |
673 | ||
2364839a JS |
674 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
675 | &args->handle); | |
676 | if (ret) { | |
677 | exynos_drm_gem_destroy(exynos_gem_obj); | |
678 | return ret; | |
679 | } | |
680 | ||
1c248b7d ID |
681 | return 0; |
682 | } | |
683 | ||
684 | int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, | |
ee5e770e JS |
685 | struct drm_device *dev, uint32_t handle, |
686 | uint64_t *offset) | |
1c248b7d | 687 | { |
1c248b7d | 688 | struct drm_gem_object *obj; |
2d91cf17 | 689 | int ret = 0; |
1c248b7d | 690 | |
1c248b7d ID |
691 | mutex_lock(&dev->struct_mutex); |
692 | ||
693 | /* | |
694 | * get offset of memory allocated for drm framebuffer. | |
695 | * - this callback would be called by user application | |
696 | * with DRM_IOCTL_MODE_MAP_DUMB command. | |
697 | */ | |
698 | ||
699 | obj = drm_gem_object_lookup(dev, file_priv, handle); | |
700 | if (!obj) { | |
701 | DRM_ERROR("failed to lookup gem object.\n"); | |
2d91cf17 JS |
702 | ret = -EINVAL; |
703 | goto unlock; | |
1c248b7d ID |
704 | } |
705 | ||
0de23977 DH |
706 | ret = drm_gem_create_mmap_offset(obj); |
707 | if (ret) | |
708 | goto out; | |
1c248b7d | 709 | |
0de23977 | 710 | *offset = drm_vma_node_offset_addr(&obj->vma_node); |
1c248b7d ID |
711 | DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); |
712 | ||
2d91cf17 JS |
713 | out: |
714 | drm_gem_object_unreference(obj); | |
715 | unlock: | |
1c248b7d | 716 | mutex_unlock(&dev->struct_mutex); |
2d91cf17 | 717 | return ret; |
1c248b7d ID |
718 | } |
719 | ||
720 | int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
721 | { | |
722 | struct drm_gem_object *obj = vma->vm_private_data; | |
1c248b7d | 723 | struct drm_device *dev = obj->dev; |
2b35892e | 724 | unsigned long f_vaddr; |
1c248b7d ID |
725 | pgoff_t page_offset; |
726 | int ret; | |
727 | ||
728 | page_offset = ((unsigned long)vmf->virtual_address - | |
729 | vma->vm_start) >> PAGE_SHIFT; | |
2b35892e | 730 | f_vaddr = (unsigned long)vmf->virtual_address; |
1c248b7d ID |
731 | |
732 | mutex_lock(&dev->struct_mutex); | |
733 | ||
0519f9a1 | 734 | ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset); |
2b35892e | 735 | if (ret < 0) |
0519f9a1 | 736 | DRM_ERROR("failed to map a buffer with user.\n"); |
1c248b7d ID |
737 | |
738 | mutex_unlock(&dev->struct_mutex); | |
739 | ||
740 | return convert_to_vm_err_msg(ret); | |
741 | } | |
742 | ||
743 | int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
744 | { | |
c01d73fa ID |
745 | struct exynos_drm_gem_obj *exynos_gem_obj; |
746 | struct drm_gem_object *obj; | |
1c248b7d ID |
747 | int ret; |
748 | ||
1c248b7d ID |
749 | /* set vm_area_struct. */ |
750 | ret = drm_gem_mmap(filp, vma); | |
751 | if (ret < 0) { | |
752 | DRM_ERROR("failed to mmap.\n"); | |
753 | return ret; | |
754 | } | |
755 | ||
c01d73fa ID |
756 | obj = vma->vm_private_data; |
757 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
758 | ||
759 | ret = check_gem_flags(exynos_gem_obj->flags); | |
760 | if (ret) { | |
761 | drm_gem_vm_close(vma); | |
762 | drm_gem_free_mmap_offset(obj); | |
763 | return ret; | |
764 | } | |
765 | ||
1c248b7d ID |
766 | vma->vm_flags &= ~VM_PFNMAP; |
767 | vma->vm_flags |= VM_MIXEDMAP; | |
768 | ||
c01d73fa ID |
769 | update_vm_cache_attr(exynos_gem_obj, vma); |
770 | ||
1c248b7d ID |
771 | return ret; |
772 | } |