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Commit | Line | Data |
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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> |
1c248b7d | 13 | |
2b35892e | 14 | #include <linux/shmem_fs.h> |
1c248b7d ID |
15 | #include <drm/exynos_drm.h> |
16 | ||
17 | #include "exynos_drm_drv.h" | |
18 | #include "exynos_drm_gem.h" | |
19 | #include "exynos_drm_buf.h" | |
20 | ||
21 | static unsigned int convert_to_vm_err_msg(int msg) | |
22 | { | |
23 | unsigned int out_msg; | |
24 | ||
25 | switch (msg) { | |
26 | case 0: | |
27 | case -ERESTARTSYS: | |
28 | case -EINTR: | |
29 | out_msg = VM_FAULT_NOPAGE; | |
30 | break; | |
31 | ||
32 | case -ENOMEM: | |
33 | out_msg = VM_FAULT_OOM; | |
34 | break; | |
35 | ||
36 | default: | |
37 | out_msg = VM_FAULT_SIGBUS; | |
38 | break; | |
39 | } | |
40 | ||
41 | return out_msg; | |
42 | } | |
43 | ||
dcf9af82 | 44 | static int check_gem_flags(unsigned int flags) |
2b35892e | 45 | { |
dcf9af82 ID |
46 | if (flags & ~(EXYNOS_BO_MASK)) { |
47 | DRM_ERROR("invalid flags.\n"); | |
48 | return -EINVAL; | |
49 | } | |
50 | ||
51 | return 0; | |
52 | } | |
53 | ||
c01d73fa ID |
54 | static void update_vm_cache_attr(struct exynos_drm_gem_obj *obj, |
55 | struct vm_area_struct *vma) | |
56 | { | |
57 | DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags); | |
58 | ||
59 | /* non-cachable as default. */ | |
60 | if (obj->flags & EXYNOS_BO_CACHABLE) | |
61 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
62 | else if (obj->flags & EXYNOS_BO_WC) | |
63 | vma->vm_page_prot = | |
64 | pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
65 | else | |
66 | vma->vm_page_prot = | |
67 | pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
68 | } | |
69 | ||
dcf9af82 ID |
70 | static unsigned long roundup_gem_size(unsigned long size, unsigned int flags) |
71 | { | |
0519f9a1 | 72 | /* TODO */ |
2b35892e | 73 | |
0519f9a1 | 74 | return roundup(size, PAGE_SIZE); |
2b35892e ID |
75 | } |
76 | ||
0519f9a1 | 77 | static int exynos_drm_gem_map_buf(struct drm_gem_object *obj, |
2b35892e ID |
78 | struct vm_area_struct *vma, |
79 | unsigned long f_vaddr, | |
80 | pgoff_t page_offset) | |
81 | { | |
82 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); | |
83 | struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; | |
4ddc404b | 84 | struct scatterlist *sgl; |
2b35892e | 85 | unsigned long pfn; |
4ddc404b | 86 | int i; |
2b35892e | 87 | |
465ed660 P |
88 | if (!buf->sgt) |
89 | return -EINTR; | |
90 | ||
91 | if (page_offset >= (buf->size >> PAGE_SHIFT)) { | |
92 | DRM_ERROR("invalid page offset\n"); | |
93 | return -EINVAL; | |
4ddc404b | 94 | } |
2b35892e | 95 | |
465ed660 P |
96 | sgl = buf->sgt->sgl; |
97 | for_each_sg(buf->sgt->sgl, sgl, buf->sgt->nents, i) { | |
98 | if (page_offset < (sgl->length >> PAGE_SHIFT)) | |
99 | break; | |
100 | page_offset -= (sgl->length >> PAGE_SHIFT); | |
101 | } | |
102 | ||
103 | pfn = __phys_to_pfn(sg_phys(sgl)) + page_offset; | |
104 | ||
2b35892e ID |
105 | return vm_insert_mixed(vma, f_vaddr, pfn); |
106 | } | |
107 | ||
2364839a JS |
108 | static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, |
109 | struct drm_file *file_priv, | |
110 | unsigned int *handle) | |
1c248b7d | 111 | { |
1c248b7d ID |
112 | int ret; |
113 | ||
1c248b7d ID |
114 | /* |
115 | * allocate a id of idr table where the obj is registered | |
116 | * and handle has the id what user can see. | |
117 | */ | |
118 | ret = drm_gem_handle_create(file_priv, obj, handle); | |
119 | if (ret) | |
2364839a | 120 | return ret; |
1c248b7d ID |
121 | |
122 | DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); | |
123 | ||
124 | /* drop reference from allocate - handle holds it now. */ | |
125 | drm_gem_object_unreference_unlocked(obj); | |
126 | ||
2364839a JS |
127 | return 0; |
128 | } | |
129 | ||
130 | void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) | |
131 | { | |
132 | struct drm_gem_object *obj; | |
c01d73fa | 133 | struct exynos_drm_gem_buf *buf; |
2364839a JS |
134 | |
135 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
136 | ||
2364839a | 137 | obj = &exynos_gem_obj->base; |
c01d73fa | 138 | buf = exynos_gem_obj->buffer; |
2364839a JS |
139 | |
140 | DRM_DEBUG_KMS("handle count = %d\n", atomic_read(&obj->handle_count)); | |
1c248b7d | 141 | |
c374e731 ID |
142 | /* |
143 | * do not release memory region from exporter. | |
144 | * | |
145 | * the region will be released by exporter | |
146 | * once dmabuf's refcount becomes 0. | |
147 | */ | |
148 | if (obj->import_attach) | |
149 | goto out; | |
150 | ||
0519f9a1 | 151 | exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf); |
2b35892e | 152 | |
c374e731 | 153 | out: |
c01d73fa | 154 | exynos_drm_fini_buf(obj->dev, buf); |
2b35892e | 155 | exynos_gem_obj->buffer = NULL; |
2364839a JS |
156 | |
157 | if (obj->map_list.map) | |
158 | drm_gem_free_mmap_offset(obj); | |
159 | ||
160 | /* release file pointer to gem object. */ | |
1c248b7d ID |
161 | drm_gem_object_release(obj); |
162 | ||
1c248b7d | 163 | kfree(exynos_gem_obj); |
2b35892e | 164 | exynos_gem_obj = NULL; |
2364839a JS |
165 | } |
166 | ||
a4f19aaa ID |
167 | unsigned long exynos_drm_gem_get_size(struct drm_device *dev, |
168 | unsigned int gem_handle, | |
169 | struct drm_file *file_priv) | |
170 | { | |
171 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
172 | struct drm_gem_object *obj; | |
173 | ||
174 | obj = drm_gem_object_lookup(dev, file_priv, gem_handle); | |
175 | if (!obj) { | |
176 | DRM_ERROR("failed to lookup gem object.\n"); | |
177 | return 0; | |
178 | } | |
179 | ||
180 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
181 | ||
182 | drm_gem_object_unreference_unlocked(obj); | |
183 | ||
184 | return exynos_gem_obj->buffer->size; | |
185 | } | |
186 | ||
187 | ||
b2df26c1 | 188 | struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, |
2364839a JS |
189 | unsigned long size) |
190 | { | |
191 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
192 | struct drm_gem_object *obj; | |
193 | int ret; | |
194 | ||
195 | exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); | |
196 | if (!exynos_gem_obj) { | |
197 | DRM_ERROR("failed to allocate exynos gem object\n"); | |
198 | return NULL; | |
199 | } | |
200 | ||
2b35892e | 201 | exynos_gem_obj->size = size; |
2364839a JS |
202 | obj = &exynos_gem_obj->base; |
203 | ||
204 | ret = drm_gem_object_init(dev, obj, size); | |
205 | if (ret < 0) { | |
206 | DRM_ERROR("failed to initialize gem object\n"); | |
207 | kfree(exynos_gem_obj); | |
208 | return NULL; | |
209 | } | |
210 | ||
211 | DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); | |
212 | ||
213 | return exynos_gem_obj; | |
1c248b7d ID |
214 | } |
215 | ||
f088d5a9 | 216 | struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, |
2b35892e ID |
217 | unsigned int flags, |
218 | unsigned long size) | |
f088d5a9 | 219 | { |
2364839a | 220 | struct exynos_drm_gem_obj *exynos_gem_obj; |
2b35892e ID |
221 | struct exynos_drm_gem_buf *buf; |
222 | int ret; | |
f088d5a9 | 223 | |
dcf9af82 ID |
224 | if (!size) { |
225 | DRM_ERROR("invalid size.\n"); | |
226 | return ERR_PTR(-EINVAL); | |
227 | } | |
228 | ||
229 | size = roundup_gem_size(size, flags); | |
230 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
f088d5a9 | 231 | |
dcf9af82 ID |
232 | ret = check_gem_flags(flags); |
233 | if (ret) | |
234 | return ERR_PTR(ret); | |
2b35892e ID |
235 | |
236 | buf = exynos_drm_init_buf(dev, size); | |
237 | if (!buf) | |
ee5e770e | 238 | return ERR_PTR(-ENOMEM); |
f088d5a9 | 239 | |
2364839a JS |
240 | exynos_gem_obj = exynos_drm_gem_init(dev, size); |
241 | if (!exynos_gem_obj) { | |
2b35892e | 242 | ret = -ENOMEM; |
dcf9af82 | 243 | goto err_fini_buf; |
f088d5a9 ID |
244 | } |
245 | ||
2b35892e ID |
246 | exynos_gem_obj->buffer = buf; |
247 | ||
248 | /* set memory type and cache attribute from user side. */ | |
249 | exynos_gem_obj->flags = flags; | |
250 | ||
0519f9a1 ID |
251 | ret = exynos_drm_alloc_buf(dev, buf, flags); |
252 | if (ret < 0) { | |
253 | drm_gem_object_release(&exynos_gem_obj->base); | |
254 | goto err_fini_buf; | |
2b35892e | 255 | } |
f088d5a9 ID |
256 | |
257 | return exynos_gem_obj; | |
dcf9af82 ID |
258 | |
259 | err_fini_buf: | |
2b35892e ID |
260 | exynos_drm_fini_buf(dev, buf); |
261 | return ERR_PTR(ret); | |
f088d5a9 ID |
262 | } |
263 | ||
1c248b7d | 264 | int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, |
ee5e770e | 265 | struct drm_file *file_priv) |
1c248b7d ID |
266 | { |
267 | struct drm_exynos_gem_create *args = data; | |
ee5e770e | 268 | struct exynos_drm_gem_obj *exynos_gem_obj; |
2364839a | 269 | int ret; |
1c248b7d | 270 | |
f088d5a9 | 271 | DRM_DEBUG_KMS("%s\n", __FILE__); |
1c248b7d | 272 | |
2b35892e | 273 | exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
1c248b7d ID |
274 | if (IS_ERR(exynos_gem_obj)) |
275 | return PTR_ERR(exynos_gem_obj); | |
276 | ||
2364839a JS |
277 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
278 | &args->handle); | |
279 | if (ret) { | |
280 | exynos_drm_gem_destroy(exynos_gem_obj); | |
281 | return ret; | |
282 | } | |
283 | ||
1c248b7d ID |
284 | return 0; |
285 | } | |
286 | ||
d87342c1 | 287 | dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, |
f0b1bda7 | 288 | unsigned int gem_handle, |
d87342c1 | 289 | struct drm_file *filp) |
f0b1bda7 ID |
290 | { |
291 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
292 | struct drm_gem_object *obj; | |
293 | ||
d87342c1 | 294 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
f0b1bda7 ID |
295 | if (!obj) { |
296 | DRM_ERROR("failed to lookup gem object.\n"); | |
297 | return ERR_PTR(-EINVAL); | |
298 | } | |
299 | ||
300 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
301 | ||
f0b1bda7 ID |
302 | return &exynos_gem_obj->buffer->dma_addr; |
303 | } | |
304 | ||
305 | void exynos_drm_gem_put_dma_addr(struct drm_device *dev, | |
306 | unsigned int gem_handle, | |
d87342c1 | 307 | struct drm_file *filp) |
f0b1bda7 ID |
308 | { |
309 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
310 | struct drm_gem_object *obj; | |
311 | ||
d87342c1 | 312 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
f0b1bda7 ID |
313 | if (!obj) { |
314 | DRM_ERROR("failed to lookup gem object.\n"); | |
315 | return; | |
316 | } | |
317 | ||
318 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
319 | ||
f0b1bda7 ID |
320 | drm_gem_object_unreference_unlocked(obj); |
321 | ||
322 | /* | |
323 | * decrease obj->refcount one more time because we has already | |
324 | * increased it at exynos_drm_gem_get_dma_addr(). | |
325 | */ | |
326 | drm_gem_object_unreference_unlocked(obj); | |
327 | } | |
328 | ||
1c248b7d | 329 | int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, |
ee5e770e | 330 | struct drm_file *file_priv) |
1c248b7d ID |
331 | { |
332 | struct drm_exynos_gem_map_off *args = data; | |
333 | ||
334 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
335 | ||
336 | DRM_DEBUG_KMS("handle = 0x%x, offset = 0x%lx\n", | |
337 | args->handle, (unsigned long)args->offset); | |
338 | ||
339 | if (!(dev->driver->driver_features & DRIVER_GEM)) { | |
340 | DRM_ERROR("does not support GEM.\n"); | |
341 | return -ENODEV; | |
342 | } | |
343 | ||
344 | return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle, | |
345 | &args->offset); | |
346 | } | |
347 | ||
5b07c660 ID |
348 | static struct drm_file *exynos_drm_find_drm_file(struct drm_device *drm_dev, |
349 | struct file *filp) | |
350 | { | |
351 | struct drm_file *file_priv; | |
352 | ||
5b07c660 | 353 | /* find current process's drm_file from filelist. */ |
5af9f116 YC |
354 | list_for_each_entry(file_priv, &drm_dev->filelist, lhead) |
355 | if (file_priv->filp == filp) | |
5b07c660 | 356 | return file_priv; |
5b07c660 | 357 | |
5b07c660 ID |
358 | WARN_ON(1); |
359 | ||
360 | return ERR_PTR(-EFAULT); | |
361 | } | |
362 | ||
1c248b7d | 363 | static int exynos_drm_gem_mmap_buffer(struct file *filp, |
ee5e770e | 364 | struct vm_area_struct *vma) |
1c248b7d ID |
365 | { |
366 | struct drm_gem_object *obj = filp->private_data; | |
367 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); | |
5b07c660 | 368 | struct drm_device *drm_dev = obj->dev; |
2c871127 | 369 | struct exynos_drm_gem_buf *buffer; |
5b07c660 | 370 | struct drm_file *file_priv; |
0519f9a1 | 371 | unsigned long vm_size; |
5b07c660 | 372 | int ret; |
1c248b7d ID |
373 | |
374 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
375 | ||
314e51b9 | 376 | vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; |
5b07c660 ID |
377 | vma->vm_private_data = obj; |
378 | vma->vm_ops = drm_dev->driver->gem_vm_ops; | |
379 | ||
380 | /* restore it to driver's fops. */ | |
381 | filp->f_op = fops_get(drm_dev->driver->fops); | |
382 | ||
383 | file_priv = exynos_drm_find_drm_file(drm_dev, filp); | |
384 | if (IS_ERR(file_priv)) | |
385 | return PTR_ERR(file_priv); | |
386 | ||
387 | /* restore it to drm_file. */ | |
388 | filp->private_data = file_priv; | |
1c248b7d | 389 | |
c01d73fa | 390 | update_vm_cache_attr(exynos_gem_obj, vma); |
1c248b7d | 391 | |
0519f9a1 | 392 | vm_size = vma->vm_end - vma->vm_start; |
2b35892e | 393 | |
1c248b7d | 394 | /* |
2c871127 | 395 | * a buffer contains information to physically continuous memory |
1c248b7d ID |
396 | * allocated by user request or at framebuffer creation. |
397 | */ | |
2c871127 | 398 | buffer = exynos_gem_obj->buffer; |
1c248b7d ID |
399 | |
400 | /* check if user-requested size is valid. */ | |
2c871127 | 401 | if (vm_size > buffer->size) |
1c248b7d ID |
402 | return -EINVAL; |
403 | ||
4744ad24 | 404 | ret = dma_mmap_attrs(drm_dev->dev, vma, buffer->pages, |
0519f9a1 ID |
405 | buffer->dma_addr, buffer->size, |
406 | &buffer->dma_attrs); | |
5b07c660 ID |
407 | if (ret < 0) { |
408 | DRM_ERROR("failed to mmap.\n"); | |
409 | return ret; | |
410 | } | |
411 | ||
412 | /* | |
413 | * take a reference to this mapping of the object. And this reference | |
414 | * is unreferenced by the corresponding vm_close call. | |
415 | */ | |
416 | drm_gem_object_reference(obj); | |
417 | ||
5b07c660 | 418 | drm_vm_open_locked(drm_dev, vma); |
5b07c660 ID |
419 | |
420 | return 0; | |
1c248b7d ID |
421 | } |
422 | ||
423 | static const struct file_operations exynos_drm_gem_fops = { | |
424 | .mmap = exynos_drm_gem_mmap_buffer, | |
425 | }; | |
426 | ||
427 | int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
ee5e770e | 428 | struct drm_file *file_priv) |
1c248b7d ID |
429 | { |
430 | struct drm_exynos_gem_mmap *args = data; | |
431 | struct drm_gem_object *obj; | |
432 | unsigned int addr; | |
433 | ||
434 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
435 | ||
436 | if (!(dev->driver->driver_features & DRIVER_GEM)) { | |
437 | DRM_ERROR("does not support GEM.\n"); | |
438 | return -ENODEV; | |
439 | } | |
440 | ||
441 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
442 | if (!obj) { | |
443 | DRM_ERROR("failed to lookup gem object.\n"); | |
444 | return -EINVAL; | |
445 | } | |
446 | ||
5af9f116 YC |
447 | /* |
448 | * We have to use gem object and its fops for specific mmaper, | |
449 | * but vm_mmap() can deliver only filp. So we have to change | |
450 | * filp->f_op and filp->private_data temporarily, then restore | |
451 | * again. So it is important to keep lock until restoration the | |
452 | * settings to prevent others from misuse of filp->f_op or | |
453 | * filp->private_data. | |
454 | */ | |
455 | mutex_lock(&dev->struct_mutex); | |
456 | ||
5b07c660 ID |
457 | /* |
458 | * Set specific mmper's fops. And it will be restored by | |
459 | * exynos_drm_gem_mmap_buffer to dev->driver->fops. | |
460 | * This is used to call specific mapper temporarily. | |
461 | */ | |
462 | file_priv->filp->f_op = &exynos_drm_gem_fops; | |
1c248b7d | 463 | |
5b07c660 ID |
464 | /* |
465 | * Set gem object to private_data so that specific mmaper | |
466 | * can get the gem object. And it will be restored by | |
467 | * exynos_drm_gem_mmap_buffer to drm_file. | |
468 | */ | |
469 | file_priv->filp->private_data = obj; | |
470 | ||
471 | addr = vm_mmap(file_priv->filp, 0, args->size, | |
1c248b7d | 472 | PROT_READ | PROT_WRITE, MAP_SHARED, 0); |
1c248b7d | 473 | |
5af9f116 | 474 | drm_gem_object_unreference(obj); |
1c248b7d | 475 | |
5b07c660 | 476 | if (IS_ERR((void *)addr)) { |
5af9f116 YC |
477 | /* check filp->f_op, filp->private_data are restored */ |
478 | if (file_priv->filp->f_op == &exynos_drm_gem_fops) { | |
479 | file_priv->filp->f_op = fops_get(dev->driver->fops); | |
480 | file_priv->filp->private_data = file_priv; | |
481 | } | |
482 | mutex_unlock(&dev->struct_mutex); | |
1c248b7d | 483 | return PTR_ERR((void *)addr); |
5b07c660 | 484 | } |
1c248b7d | 485 | |
5af9f116 YC |
486 | mutex_unlock(&dev->struct_mutex); |
487 | ||
1c248b7d ID |
488 | args->mapped = addr; |
489 | ||
490 | DRM_DEBUG_KMS("mapped = 0x%lx\n", (unsigned long)args->mapped); | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
40cd7e0c ID |
495 | int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, |
496 | struct drm_file *file_priv) | |
497 | { struct exynos_drm_gem_obj *exynos_gem_obj; | |
498 | struct drm_exynos_gem_info *args = data; | |
499 | struct drm_gem_object *obj; | |
500 | ||
501 | mutex_lock(&dev->struct_mutex); | |
502 | ||
503 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
504 | if (!obj) { | |
505 | DRM_ERROR("failed to lookup gem object.\n"); | |
506 | mutex_unlock(&dev->struct_mutex); | |
507 | return -EINVAL; | |
508 | } | |
509 | ||
510 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
511 | ||
512 | args->flags = exynos_gem_obj->flags; | |
513 | args->size = exynos_gem_obj->size; | |
514 | ||
515 | drm_gem_object_unreference(obj); | |
516 | mutex_unlock(&dev->struct_mutex); | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
2a3098ff ID |
521 | struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma) |
522 | { | |
523 | struct vm_area_struct *vma_copy; | |
524 | ||
525 | vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL); | |
526 | if (!vma_copy) | |
527 | return NULL; | |
528 | ||
529 | if (vma->vm_ops && vma->vm_ops->open) | |
530 | vma->vm_ops->open(vma); | |
531 | ||
532 | if (vma->vm_file) | |
533 | get_file(vma->vm_file); | |
534 | ||
535 | memcpy(vma_copy, vma, sizeof(*vma)); | |
536 | ||
537 | vma_copy->vm_mm = NULL; | |
538 | vma_copy->vm_next = NULL; | |
539 | vma_copy->vm_prev = NULL; | |
540 | ||
541 | return vma_copy; | |
542 | } | |
543 | ||
544 | void exynos_gem_put_vma(struct vm_area_struct *vma) | |
545 | { | |
546 | if (!vma) | |
547 | return; | |
548 | ||
549 | if (vma->vm_ops && vma->vm_ops->close) | |
550 | vma->vm_ops->close(vma); | |
551 | ||
552 | if (vma->vm_file) | |
553 | fput(vma->vm_file); | |
554 | ||
555 | kfree(vma); | |
556 | } | |
557 | ||
558 | int exynos_gem_get_pages_from_userptr(unsigned long start, | |
559 | unsigned int npages, | |
560 | struct page **pages, | |
561 | struct vm_area_struct *vma) | |
562 | { | |
563 | int get_npages; | |
564 | ||
565 | /* the memory region mmaped with VM_PFNMAP. */ | |
566 | if (vma_is_io(vma)) { | |
567 | unsigned int i; | |
568 | ||
569 | for (i = 0; i < npages; ++i, start += PAGE_SIZE) { | |
570 | unsigned long pfn; | |
571 | int ret = follow_pfn(vma, start, &pfn); | |
572 | if (ret) | |
573 | return ret; | |
574 | ||
575 | pages[i] = pfn_to_page(pfn); | |
576 | } | |
577 | ||
578 | if (i != npages) { | |
579 | DRM_ERROR("failed to get user_pages.\n"); | |
580 | return -EINVAL; | |
581 | } | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
586 | get_npages = get_user_pages(current, current->mm, start, | |
587 | npages, 1, 1, pages, NULL); | |
588 | get_npages = max(get_npages, 0); | |
589 | if (get_npages != npages) { | |
590 | DRM_ERROR("failed to get user_pages.\n"); | |
591 | while (get_npages) | |
592 | put_page(pages[--get_npages]); | |
593 | return -EFAULT; | |
594 | } | |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
599 | void exynos_gem_put_pages_to_userptr(struct page **pages, | |
600 | unsigned int npages, | |
601 | struct vm_area_struct *vma) | |
602 | { | |
603 | if (!vma_is_io(vma)) { | |
604 | unsigned int i; | |
605 | ||
606 | for (i = 0; i < npages; i++) { | |
607 | set_page_dirty_lock(pages[i]); | |
608 | ||
609 | /* | |
610 | * undo the reference we took when populating | |
611 | * the table. | |
612 | */ | |
613 | put_page(pages[i]); | |
614 | } | |
615 | } | |
616 | } | |
617 | ||
618 | int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, | |
619 | struct sg_table *sgt, | |
620 | enum dma_data_direction dir) | |
621 | { | |
622 | int nents; | |
623 | ||
624 | mutex_lock(&drm_dev->struct_mutex); | |
625 | ||
626 | nents = dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); | |
627 | if (!nents) { | |
628 | DRM_ERROR("failed to map sgl with dma.\n"); | |
629 | mutex_unlock(&drm_dev->struct_mutex); | |
630 | return nents; | |
631 | } | |
632 | ||
633 | mutex_unlock(&drm_dev->struct_mutex); | |
634 | return 0; | |
635 | } | |
636 | ||
637 | void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, | |
638 | struct sg_table *sgt, | |
639 | enum dma_data_direction dir) | |
640 | { | |
641 | dma_unmap_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); | |
642 | } | |
643 | ||
1c248b7d ID |
644 | int exynos_drm_gem_init_object(struct drm_gem_object *obj) |
645 | { | |
646 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
ee5e770e | 651 | void exynos_drm_gem_free_object(struct drm_gem_object *obj) |
1c248b7d | 652 | { |
b2df26c1 ID |
653 | struct exynos_drm_gem_obj *exynos_gem_obj; |
654 | struct exynos_drm_gem_buf *buf; | |
655 | ||
1c248b7d ID |
656 | DRM_DEBUG_KMS("%s\n", __FILE__); |
657 | ||
b2df26c1 ID |
658 | exynos_gem_obj = to_exynos_gem_obj(obj); |
659 | buf = exynos_gem_obj->buffer; | |
660 | ||
661 | if (obj->import_attach) | |
662 | drm_prime_gem_destroy(obj, buf->sgt); | |
663 | ||
2364839a | 664 | exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); |
1c248b7d ID |
665 | } |
666 | ||
667 | int exynos_drm_gem_dumb_create(struct drm_file *file_priv, | |
ee5e770e JS |
668 | struct drm_device *dev, |
669 | struct drm_mode_create_dumb *args) | |
1c248b7d ID |
670 | { |
671 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
2364839a | 672 | int ret; |
1c248b7d ID |
673 | |
674 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
675 | ||
676 | /* | |
677 | * alocate memory to be used for framebuffer. | |
678 | * - this callback would be called by user application | |
679 | * with DRM_IOCTL_MODE_CREATE_DUMB command. | |
680 | */ | |
681 | ||
3fd6b694 | 682 | args->pitch = args->width * ((args->bpp + 7) / 8); |
7da5907c | 683 | args->size = args->pitch * args->height; |
1c248b7d | 684 | |
2b35892e | 685 | exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
1c248b7d ID |
686 | if (IS_ERR(exynos_gem_obj)) |
687 | return PTR_ERR(exynos_gem_obj); | |
688 | ||
2364839a JS |
689 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
690 | &args->handle); | |
691 | if (ret) { | |
692 | exynos_drm_gem_destroy(exynos_gem_obj); | |
693 | return ret; | |
694 | } | |
695 | ||
1c248b7d ID |
696 | return 0; |
697 | } | |
698 | ||
699 | int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, | |
ee5e770e JS |
700 | struct drm_device *dev, uint32_t handle, |
701 | uint64_t *offset) | |
1c248b7d | 702 | { |
1c248b7d | 703 | struct drm_gem_object *obj; |
2d91cf17 | 704 | int ret = 0; |
1c248b7d ID |
705 | |
706 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
707 | ||
708 | mutex_lock(&dev->struct_mutex); | |
709 | ||
710 | /* | |
711 | * get offset of memory allocated for drm framebuffer. | |
712 | * - this callback would be called by user application | |
713 | * with DRM_IOCTL_MODE_MAP_DUMB command. | |
714 | */ | |
715 | ||
716 | obj = drm_gem_object_lookup(dev, file_priv, handle); | |
717 | if (!obj) { | |
718 | DRM_ERROR("failed to lookup gem object.\n"); | |
2d91cf17 JS |
719 | ret = -EINVAL; |
720 | goto unlock; | |
1c248b7d ID |
721 | } |
722 | ||
6037bafa LP |
723 | if (!obj->map_list.map) { |
724 | ret = drm_gem_create_mmap_offset(obj); | |
2d91cf17 JS |
725 | if (ret) |
726 | goto out; | |
727 | } | |
1c248b7d | 728 | |
6037bafa | 729 | *offset = (u64)obj->map_list.hash.key << PAGE_SHIFT; |
1c248b7d ID |
730 | DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); |
731 | ||
2d91cf17 JS |
732 | out: |
733 | drm_gem_object_unreference(obj); | |
734 | unlock: | |
1c248b7d | 735 | mutex_unlock(&dev->struct_mutex); |
2d91cf17 | 736 | return ret; |
1c248b7d ID |
737 | } |
738 | ||
ee5e770e JS |
739 | int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, |
740 | struct drm_device *dev, | |
741 | unsigned int handle) | |
742 | { | |
743 | int ret; | |
744 | ||
745 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
746 | ||
747 | /* | |
748 | * obj->refcount and obj->handle_count are decreased and | |
749 | * if both them are 0 then exynos_drm_gem_free_object() | |
750 | * would be called by callback to release resources. | |
751 | */ | |
752 | ret = drm_gem_handle_delete(file_priv, handle); | |
753 | if (ret < 0) { | |
754 | DRM_ERROR("failed to delete drm_gem_handle.\n"); | |
755 | return ret; | |
756 | } | |
757 | ||
758 | return 0; | |
759 | } | |
760 | ||
1c248b7d ID |
761 | int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
762 | { | |
763 | struct drm_gem_object *obj = vma->vm_private_data; | |
1c248b7d | 764 | struct drm_device *dev = obj->dev; |
2b35892e | 765 | unsigned long f_vaddr; |
1c248b7d ID |
766 | pgoff_t page_offset; |
767 | int ret; | |
768 | ||
769 | page_offset = ((unsigned long)vmf->virtual_address - | |
770 | vma->vm_start) >> PAGE_SHIFT; | |
2b35892e | 771 | f_vaddr = (unsigned long)vmf->virtual_address; |
1c248b7d ID |
772 | |
773 | mutex_lock(&dev->struct_mutex); | |
774 | ||
0519f9a1 | 775 | ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset); |
2b35892e | 776 | if (ret < 0) |
0519f9a1 | 777 | DRM_ERROR("failed to map a buffer with user.\n"); |
1c248b7d ID |
778 | |
779 | mutex_unlock(&dev->struct_mutex); | |
780 | ||
781 | return convert_to_vm_err_msg(ret); | |
782 | } | |
783 | ||
784 | int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
785 | { | |
c01d73fa ID |
786 | struct exynos_drm_gem_obj *exynos_gem_obj; |
787 | struct drm_gem_object *obj; | |
1c248b7d ID |
788 | int ret; |
789 | ||
790 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
791 | ||
792 | /* set vm_area_struct. */ | |
793 | ret = drm_gem_mmap(filp, vma); | |
794 | if (ret < 0) { | |
795 | DRM_ERROR("failed to mmap.\n"); | |
796 | return ret; | |
797 | } | |
798 | ||
c01d73fa ID |
799 | obj = vma->vm_private_data; |
800 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
801 | ||
802 | ret = check_gem_flags(exynos_gem_obj->flags); | |
803 | if (ret) { | |
804 | drm_gem_vm_close(vma); | |
805 | drm_gem_free_mmap_offset(obj); | |
806 | return ret; | |
807 | } | |
808 | ||
1c248b7d ID |
809 | vma->vm_flags &= ~VM_PFNMAP; |
810 | vma->vm_flags |= VM_MIXEDMAP; | |
811 | ||
c01d73fa ID |
812 | update_vm_cache_attr(exynos_gem_obj, vma); |
813 | ||
1c248b7d ID |
814 | return ret; |
815 | } |