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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> |
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" | |
3fec4532 | 21 | #include "exynos_drm_iommu.h" |
1c248b7d ID |
22 | |
23 | static unsigned int convert_to_vm_err_msg(int msg) | |
24 | { | |
25 | unsigned int out_msg; | |
26 | ||
27 | switch (msg) { | |
28 | case 0: | |
29 | case -ERESTARTSYS: | |
30 | case -EINTR: | |
31 | out_msg = VM_FAULT_NOPAGE; | |
32 | break; | |
33 | ||
34 | case -ENOMEM: | |
35 | out_msg = VM_FAULT_OOM; | |
36 | break; | |
37 | ||
38 | default: | |
39 | out_msg = VM_FAULT_SIGBUS; | |
40 | break; | |
41 | } | |
42 | ||
43 | return out_msg; | |
44 | } | |
45 | ||
dcf9af82 | 46 | static int check_gem_flags(unsigned int flags) |
2b35892e | 47 | { |
dcf9af82 ID |
48 | if (flags & ~(EXYNOS_BO_MASK)) { |
49 | DRM_ERROR("invalid flags.\n"); | |
50 | return -EINVAL; | |
51 | } | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
c01d73fa ID |
56 | static void update_vm_cache_attr(struct exynos_drm_gem_obj *obj, |
57 | struct vm_area_struct *vma) | |
58 | { | |
59 | DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags); | |
60 | ||
61 | /* non-cachable as default. */ | |
62 | if (obj->flags & EXYNOS_BO_CACHABLE) | |
63 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
64 | else if (obj->flags & EXYNOS_BO_WC) | |
65 | vma->vm_page_prot = | |
66 | pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
67 | else | |
68 | vma->vm_page_prot = | |
69 | pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
70 | } | |
71 | ||
dcf9af82 ID |
72 | static unsigned long roundup_gem_size(unsigned long size, unsigned int flags) |
73 | { | |
0519f9a1 | 74 | /* TODO */ |
2b35892e | 75 | |
0519f9a1 | 76 | return roundup(size, PAGE_SIZE); |
2b35892e ID |
77 | } |
78 | ||
0519f9a1 | 79 | static int exynos_drm_gem_map_buf(struct drm_gem_object *obj, |
2b35892e ID |
80 | struct vm_area_struct *vma, |
81 | unsigned long f_vaddr, | |
82 | pgoff_t page_offset) | |
83 | { | |
84 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); | |
85 | struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; | |
4ddc404b | 86 | struct scatterlist *sgl; |
2b35892e | 87 | unsigned long pfn; |
4ddc404b | 88 | int i; |
2b35892e | 89 | |
465ed660 P |
90 | if (!buf->sgt) |
91 | return -EINTR; | |
92 | ||
93 | if (page_offset >= (buf->size >> PAGE_SHIFT)) { | |
94 | DRM_ERROR("invalid page offset\n"); | |
95 | return -EINVAL; | |
4ddc404b | 96 | } |
2b35892e | 97 | |
465ed660 P |
98 | sgl = buf->sgt->sgl; |
99 | for_each_sg(buf->sgt->sgl, sgl, buf->sgt->nents, i) { | |
100 | if (page_offset < (sgl->length >> PAGE_SHIFT)) | |
101 | break; | |
102 | page_offset -= (sgl->length >> PAGE_SHIFT); | |
103 | } | |
104 | ||
105 | pfn = __phys_to_pfn(sg_phys(sgl)) + page_offset; | |
106 | ||
2b35892e ID |
107 | return vm_insert_mixed(vma, f_vaddr, pfn); |
108 | } | |
109 | ||
2364839a JS |
110 | static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, |
111 | struct drm_file *file_priv, | |
112 | unsigned int *handle) | |
1c248b7d | 113 | { |
1c248b7d ID |
114 | int ret; |
115 | ||
1c248b7d ID |
116 | /* |
117 | * allocate a id of idr table where the obj is registered | |
118 | * and handle has the id what user can see. | |
119 | */ | |
120 | ret = drm_gem_handle_create(file_priv, obj, handle); | |
121 | if (ret) | |
2364839a | 122 | return ret; |
1c248b7d ID |
123 | |
124 | DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); | |
125 | ||
126 | /* drop reference from allocate - handle holds it now. */ | |
127 | drm_gem_object_unreference_unlocked(obj); | |
128 | ||
2364839a JS |
129 | return 0; |
130 | } | |
131 | ||
132 | void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) | |
133 | { | |
134 | struct drm_gem_object *obj; | |
c01d73fa | 135 | struct exynos_drm_gem_buf *buf; |
2364839a | 136 | |
2364839a | 137 | obj = &exynos_gem_obj->base; |
c01d73fa | 138 | buf = exynos_gem_obj->buffer; |
2364839a | 139 | |
a8e11d1c | 140 | DRM_DEBUG_KMS("handle count = %d\n", 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 | 156 | |
0de23977 | 157 | drm_gem_free_mmap_offset(obj); |
2364839a JS |
158 | |
159 | /* release file pointer to gem object. */ | |
1c248b7d ID |
160 | drm_gem_object_release(obj); |
161 | ||
1c248b7d | 162 | kfree(exynos_gem_obj); |
2b35892e | 163 | exynos_gem_obj = NULL; |
2364839a JS |
164 | } |
165 | ||
a4f19aaa ID |
166 | unsigned long exynos_drm_gem_get_size(struct drm_device *dev, |
167 | unsigned int gem_handle, | |
168 | struct drm_file *file_priv) | |
169 | { | |
170 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
171 | struct drm_gem_object *obj; | |
172 | ||
173 | obj = drm_gem_object_lookup(dev, file_priv, gem_handle); | |
174 | if (!obj) { | |
175 | DRM_ERROR("failed to lookup gem object.\n"); | |
176 | return 0; | |
177 | } | |
178 | ||
179 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
180 | ||
181 | drm_gem_object_unreference_unlocked(obj); | |
182 | ||
183 | return exynos_gem_obj->buffer->size; | |
184 | } | |
185 | ||
186 | ||
b2df26c1 | 187 | struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, |
2364839a JS |
188 | unsigned long size) |
189 | { | |
190 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
191 | struct drm_gem_object *obj; | |
192 | int ret; | |
193 | ||
194 | exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); | |
38bb5253 | 195 | if (!exynos_gem_obj) |
2364839a | 196 | return NULL; |
2364839a | 197 | |
2b35892e | 198 | exynos_gem_obj->size = size; |
2364839a JS |
199 | obj = &exynos_gem_obj->base; |
200 | ||
201 | ret = drm_gem_object_init(dev, obj, size); | |
202 | if (ret < 0) { | |
203 | DRM_ERROR("failed to initialize gem object\n"); | |
204 | kfree(exynos_gem_obj); | |
205 | return NULL; | |
206 | } | |
207 | ||
208 | DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); | |
209 | ||
210 | return exynos_gem_obj; | |
1c248b7d ID |
211 | } |
212 | ||
f088d5a9 | 213 | struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, |
2b35892e ID |
214 | unsigned int flags, |
215 | unsigned long size) | |
f088d5a9 | 216 | { |
2364839a | 217 | struct exynos_drm_gem_obj *exynos_gem_obj; |
2b35892e ID |
218 | struct exynos_drm_gem_buf *buf; |
219 | int ret; | |
f088d5a9 | 220 | |
dcf9af82 ID |
221 | if (!size) { |
222 | DRM_ERROR("invalid size.\n"); | |
223 | return ERR_PTR(-EINVAL); | |
224 | } | |
225 | ||
226 | size = roundup_gem_size(size, flags); | |
f088d5a9 | 227 | |
dcf9af82 ID |
228 | ret = check_gem_flags(flags); |
229 | if (ret) | |
230 | return ERR_PTR(ret); | |
2b35892e ID |
231 | |
232 | buf = exynos_drm_init_buf(dev, size); | |
233 | if (!buf) | |
ee5e770e | 234 | return ERR_PTR(-ENOMEM); |
f088d5a9 | 235 | |
2364839a JS |
236 | exynos_gem_obj = exynos_drm_gem_init(dev, size); |
237 | if (!exynos_gem_obj) { | |
2b35892e | 238 | ret = -ENOMEM; |
dcf9af82 | 239 | goto err_fini_buf; |
f088d5a9 ID |
240 | } |
241 | ||
2b35892e ID |
242 | exynos_gem_obj->buffer = buf; |
243 | ||
244 | /* set memory type and cache attribute from user side. */ | |
245 | exynos_gem_obj->flags = flags; | |
246 | ||
0519f9a1 | 247 | ret = exynos_drm_alloc_buf(dev, buf, flags); |
c58c1599 YC |
248 | if (ret < 0) |
249 | goto err_gem_fini; | |
f088d5a9 ID |
250 | |
251 | return exynos_gem_obj; | |
dcf9af82 | 252 | |
c58c1599 YC |
253 | err_gem_fini: |
254 | drm_gem_object_release(&exynos_gem_obj->base); | |
255 | kfree(exynos_gem_obj); | |
dcf9af82 | 256 | err_fini_buf: |
2b35892e ID |
257 | exynos_drm_fini_buf(dev, buf); |
258 | return ERR_PTR(ret); | |
f088d5a9 ID |
259 | } |
260 | ||
1c248b7d | 261 | int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, |
ee5e770e | 262 | struct drm_file *file_priv) |
1c248b7d ID |
263 | { |
264 | struct drm_exynos_gem_create *args = data; | |
ee5e770e | 265 | struct exynos_drm_gem_obj *exynos_gem_obj; |
2364839a | 266 | int ret; |
1c248b7d | 267 | |
2b35892e | 268 | exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
1c248b7d ID |
269 | if (IS_ERR(exynos_gem_obj)) |
270 | return PTR_ERR(exynos_gem_obj); | |
271 | ||
2364839a JS |
272 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
273 | &args->handle); | |
274 | if (ret) { | |
275 | exynos_drm_gem_destroy(exynos_gem_obj); | |
276 | return ret; | |
277 | } | |
278 | ||
1c248b7d ID |
279 | return 0; |
280 | } | |
281 | ||
d87342c1 | 282 | dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, |
f0b1bda7 | 283 | unsigned int gem_handle, |
d87342c1 | 284 | struct drm_file *filp) |
f0b1bda7 ID |
285 | { |
286 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
287 | struct drm_gem_object *obj; | |
288 | ||
d87342c1 | 289 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
f0b1bda7 ID |
290 | if (!obj) { |
291 | DRM_ERROR("failed to lookup gem object.\n"); | |
292 | return ERR_PTR(-EINVAL); | |
293 | } | |
294 | ||
295 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
296 | ||
f0b1bda7 ID |
297 | return &exynos_gem_obj->buffer->dma_addr; |
298 | } | |
299 | ||
300 | void exynos_drm_gem_put_dma_addr(struct drm_device *dev, | |
301 | unsigned int gem_handle, | |
d87342c1 | 302 | struct drm_file *filp) |
f0b1bda7 ID |
303 | { |
304 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
305 | struct drm_gem_object *obj; | |
306 | ||
d87342c1 | 307 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
f0b1bda7 ID |
308 | if (!obj) { |
309 | DRM_ERROR("failed to lookup gem object.\n"); | |
310 | return; | |
311 | } | |
312 | ||
313 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
314 | ||
f0b1bda7 ID |
315 | drm_gem_object_unreference_unlocked(obj); |
316 | ||
317 | /* | |
318 | * decrease obj->refcount one more time because we has already | |
319 | * increased it at exynos_drm_gem_get_dma_addr(). | |
320 | */ | |
321 | drm_gem_object_unreference_unlocked(obj); | |
322 | } | |
323 | ||
1c248b7d | 324 | int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, |
ee5e770e | 325 | struct drm_file *file_priv) |
1c248b7d ID |
326 | { |
327 | struct drm_exynos_gem_map_off *args = data; | |
328 | ||
1c248b7d ID |
329 | DRM_DEBUG_KMS("handle = 0x%x, offset = 0x%lx\n", |
330 | args->handle, (unsigned long)args->offset); | |
331 | ||
332 | if (!(dev->driver->driver_features & DRIVER_GEM)) { | |
333 | DRM_ERROR("does not support GEM.\n"); | |
334 | return -ENODEV; | |
335 | } | |
336 | ||
337 | return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle, | |
338 | &args->offset); | |
339 | } | |
340 | ||
5b07c660 ID |
341 | static struct drm_file *exynos_drm_find_drm_file(struct drm_device *drm_dev, |
342 | struct file *filp) | |
343 | { | |
344 | struct drm_file *file_priv; | |
345 | ||
5b07c660 | 346 | /* find current process's drm_file from filelist. */ |
5af9f116 YC |
347 | list_for_each_entry(file_priv, &drm_dev->filelist, lhead) |
348 | if (file_priv->filp == filp) | |
5b07c660 | 349 | return file_priv; |
5b07c660 | 350 | |
5b07c660 ID |
351 | WARN_ON(1); |
352 | ||
353 | return ERR_PTR(-EFAULT); | |
354 | } | |
355 | ||
1c248b7d | 356 | static int exynos_drm_gem_mmap_buffer(struct file *filp, |
ee5e770e | 357 | struct vm_area_struct *vma) |
1c248b7d ID |
358 | { |
359 | struct drm_gem_object *obj = filp->private_data; | |
360 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); | |
5b07c660 | 361 | struct drm_device *drm_dev = obj->dev; |
2c871127 | 362 | struct exynos_drm_gem_buf *buffer; |
5b07c660 | 363 | struct drm_file *file_priv; |
0519f9a1 | 364 | unsigned long vm_size; |
5b07c660 | 365 | int ret; |
1c248b7d | 366 | |
314e51b9 | 367 | vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; |
5b07c660 ID |
368 | vma->vm_private_data = obj; |
369 | vma->vm_ops = drm_dev->driver->gem_vm_ops; | |
370 | ||
371 | /* restore it to driver's fops. */ | |
372 | filp->f_op = fops_get(drm_dev->driver->fops); | |
373 | ||
374 | file_priv = exynos_drm_find_drm_file(drm_dev, filp); | |
375 | if (IS_ERR(file_priv)) | |
376 | return PTR_ERR(file_priv); | |
377 | ||
378 | /* restore it to drm_file. */ | |
379 | filp->private_data = file_priv; | |
1c248b7d | 380 | |
c01d73fa | 381 | update_vm_cache_attr(exynos_gem_obj, vma); |
1c248b7d | 382 | |
0519f9a1 | 383 | vm_size = vma->vm_end - vma->vm_start; |
2b35892e | 384 | |
1c248b7d | 385 | /* |
2c871127 | 386 | * a buffer contains information to physically continuous memory |
1c248b7d ID |
387 | * allocated by user request or at framebuffer creation. |
388 | */ | |
2c871127 | 389 | buffer = exynos_gem_obj->buffer; |
1c248b7d ID |
390 | |
391 | /* check if user-requested size is valid. */ | |
2c871127 | 392 | if (vm_size > buffer->size) |
1c248b7d ID |
393 | return -EINVAL; |
394 | ||
4744ad24 | 395 | ret = dma_mmap_attrs(drm_dev->dev, vma, buffer->pages, |
0519f9a1 ID |
396 | buffer->dma_addr, buffer->size, |
397 | &buffer->dma_attrs); | |
5b07c660 ID |
398 | if (ret < 0) { |
399 | DRM_ERROR("failed to mmap.\n"); | |
400 | return ret; | |
401 | } | |
402 | ||
403 | /* | |
404 | * take a reference to this mapping of the object. And this reference | |
405 | * is unreferenced by the corresponding vm_close call. | |
406 | */ | |
407 | drm_gem_object_reference(obj); | |
408 | ||
5b07c660 | 409 | drm_vm_open_locked(drm_dev, vma); |
5b07c660 ID |
410 | |
411 | return 0; | |
1c248b7d ID |
412 | } |
413 | ||
414 | static const struct file_operations exynos_drm_gem_fops = { | |
415 | .mmap = exynos_drm_gem_mmap_buffer, | |
416 | }; | |
417 | ||
418 | int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
ee5e770e | 419 | struct drm_file *file_priv) |
1c248b7d ID |
420 | { |
421 | struct drm_exynos_gem_mmap *args = data; | |
422 | struct drm_gem_object *obj; | |
23f340e0 | 423 | unsigned long addr; |
1c248b7d | 424 | |
1c248b7d ID |
425 | if (!(dev->driver->driver_features & DRIVER_GEM)) { |
426 | DRM_ERROR("does not support GEM.\n"); | |
427 | return -ENODEV; | |
428 | } | |
429 | ||
430 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
431 | if (!obj) { | |
432 | DRM_ERROR("failed to lookup gem object.\n"); | |
433 | return -EINVAL; | |
434 | } | |
435 | ||
5af9f116 YC |
436 | /* |
437 | * We have to use gem object and its fops for specific mmaper, | |
438 | * but vm_mmap() can deliver only filp. So we have to change | |
439 | * filp->f_op and filp->private_data temporarily, then restore | |
440 | * again. So it is important to keep lock until restoration the | |
441 | * settings to prevent others from misuse of filp->f_op or | |
442 | * filp->private_data. | |
443 | */ | |
444 | mutex_lock(&dev->struct_mutex); | |
445 | ||
5b07c660 ID |
446 | /* |
447 | * Set specific mmper's fops. And it will be restored by | |
448 | * exynos_drm_gem_mmap_buffer to dev->driver->fops. | |
449 | * This is used to call specific mapper temporarily. | |
450 | */ | |
451 | file_priv->filp->f_op = &exynos_drm_gem_fops; | |
1c248b7d | 452 | |
5b07c660 ID |
453 | /* |
454 | * Set gem object to private_data so that specific mmaper | |
455 | * can get the gem object. And it will be restored by | |
456 | * exynos_drm_gem_mmap_buffer to drm_file. | |
457 | */ | |
458 | file_priv->filp->private_data = obj; | |
459 | ||
460 | addr = vm_mmap(file_priv->filp, 0, args->size, | |
1c248b7d | 461 | PROT_READ | PROT_WRITE, MAP_SHARED, 0); |
1c248b7d | 462 | |
5af9f116 | 463 | drm_gem_object_unreference(obj); |
1c248b7d | 464 | |
23f340e0 | 465 | if (IS_ERR_VALUE(addr)) { |
5af9f116 YC |
466 | /* check filp->f_op, filp->private_data are restored */ |
467 | if (file_priv->filp->f_op == &exynos_drm_gem_fops) { | |
468 | file_priv->filp->f_op = fops_get(dev->driver->fops); | |
469 | file_priv->filp->private_data = file_priv; | |
470 | } | |
471 | mutex_unlock(&dev->struct_mutex); | |
23f340e0 | 472 | return (int)addr; |
5b07c660 | 473 | } |
1c248b7d | 474 | |
5af9f116 YC |
475 | mutex_unlock(&dev->struct_mutex); |
476 | ||
1c248b7d ID |
477 | args->mapped = addr; |
478 | ||
479 | DRM_DEBUG_KMS("mapped = 0x%lx\n", (unsigned long)args->mapped); | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
40cd7e0c ID |
484 | int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, |
485 | struct drm_file *file_priv) | |
486 | { struct exynos_drm_gem_obj *exynos_gem_obj; | |
487 | struct drm_exynos_gem_info *args = data; | |
488 | struct drm_gem_object *obj; | |
489 | ||
490 | mutex_lock(&dev->struct_mutex); | |
491 | ||
492 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
493 | if (!obj) { | |
494 | DRM_ERROR("failed to lookup gem object.\n"); | |
495 | mutex_unlock(&dev->struct_mutex); | |
496 | return -EINVAL; | |
497 | } | |
498 | ||
499 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
500 | ||
501 | args->flags = exynos_gem_obj->flags; | |
502 | args->size = exynos_gem_obj->size; | |
503 | ||
504 | drm_gem_object_unreference(obj); | |
505 | mutex_unlock(&dev->struct_mutex); | |
506 | ||
507 | return 0; | |
508 | } | |
509 | ||
2a3098ff ID |
510 | struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma) |
511 | { | |
512 | struct vm_area_struct *vma_copy; | |
513 | ||
514 | vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL); | |
515 | if (!vma_copy) | |
516 | return NULL; | |
517 | ||
518 | if (vma->vm_ops && vma->vm_ops->open) | |
519 | vma->vm_ops->open(vma); | |
520 | ||
521 | if (vma->vm_file) | |
522 | get_file(vma->vm_file); | |
523 | ||
524 | memcpy(vma_copy, vma, sizeof(*vma)); | |
525 | ||
526 | vma_copy->vm_mm = NULL; | |
527 | vma_copy->vm_next = NULL; | |
528 | vma_copy->vm_prev = NULL; | |
529 | ||
530 | return vma_copy; | |
531 | } | |
532 | ||
533 | void exynos_gem_put_vma(struct vm_area_struct *vma) | |
534 | { | |
535 | if (!vma) | |
536 | return; | |
537 | ||
538 | if (vma->vm_ops && vma->vm_ops->close) | |
539 | vma->vm_ops->close(vma); | |
540 | ||
541 | if (vma->vm_file) | |
542 | fput(vma->vm_file); | |
543 | ||
544 | kfree(vma); | |
545 | } | |
546 | ||
547 | int exynos_gem_get_pages_from_userptr(unsigned long start, | |
548 | unsigned int npages, | |
549 | struct page **pages, | |
550 | struct vm_area_struct *vma) | |
551 | { | |
552 | int get_npages; | |
553 | ||
554 | /* the memory region mmaped with VM_PFNMAP. */ | |
555 | if (vma_is_io(vma)) { | |
556 | unsigned int i; | |
557 | ||
558 | for (i = 0; i < npages; ++i, start += PAGE_SIZE) { | |
559 | unsigned long pfn; | |
560 | int ret = follow_pfn(vma, start, &pfn); | |
561 | if (ret) | |
562 | return ret; | |
563 | ||
564 | pages[i] = pfn_to_page(pfn); | |
565 | } | |
566 | ||
567 | if (i != npages) { | |
568 | DRM_ERROR("failed to get user_pages.\n"); | |
569 | return -EINVAL; | |
570 | } | |
571 | ||
572 | return 0; | |
573 | } | |
574 | ||
575 | get_npages = get_user_pages(current, current->mm, start, | |
576 | npages, 1, 1, pages, NULL); | |
577 | get_npages = max(get_npages, 0); | |
578 | if (get_npages != npages) { | |
579 | DRM_ERROR("failed to get user_pages.\n"); | |
580 | while (get_npages) | |
581 | put_page(pages[--get_npages]); | |
582 | return -EFAULT; | |
583 | } | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
588 | void exynos_gem_put_pages_to_userptr(struct page **pages, | |
589 | unsigned int npages, | |
590 | struct vm_area_struct *vma) | |
591 | { | |
592 | if (!vma_is_io(vma)) { | |
593 | unsigned int i; | |
594 | ||
595 | for (i = 0; i < npages; i++) { | |
596 | set_page_dirty_lock(pages[i]); | |
597 | ||
598 | /* | |
599 | * undo the reference we took when populating | |
600 | * the table. | |
601 | */ | |
602 | put_page(pages[i]); | |
603 | } | |
604 | } | |
605 | } | |
606 | ||
607 | int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, | |
608 | struct sg_table *sgt, | |
609 | enum dma_data_direction dir) | |
610 | { | |
611 | int nents; | |
612 | ||
613 | mutex_lock(&drm_dev->struct_mutex); | |
614 | ||
615 | nents = dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); | |
616 | if (!nents) { | |
617 | DRM_ERROR("failed to map sgl with dma.\n"); | |
618 | mutex_unlock(&drm_dev->struct_mutex); | |
619 | return nents; | |
620 | } | |
621 | ||
622 | mutex_unlock(&drm_dev->struct_mutex); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, | |
627 | struct sg_table *sgt, | |
628 | enum dma_data_direction dir) | |
629 | { | |
630 | dma_unmap_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); | |
631 | } | |
632 | ||
1c248b7d ID |
633 | int exynos_drm_gem_init_object(struct drm_gem_object *obj) |
634 | { | |
1c248b7d ID |
635 | return 0; |
636 | } | |
637 | ||
ee5e770e | 638 | void exynos_drm_gem_free_object(struct drm_gem_object *obj) |
1c248b7d | 639 | { |
b2df26c1 ID |
640 | struct exynos_drm_gem_obj *exynos_gem_obj; |
641 | struct exynos_drm_gem_buf *buf; | |
642 | ||
b2df26c1 ID |
643 | exynos_gem_obj = to_exynos_gem_obj(obj); |
644 | buf = exynos_gem_obj->buffer; | |
645 | ||
646 | if (obj->import_attach) | |
647 | drm_prime_gem_destroy(obj, buf->sgt); | |
648 | ||
2364839a | 649 | exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); |
1c248b7d ID |
650 | } |
651 | ||
652 | int exynos_drm_gem_dumb_create(struct drm_file *file_priv, | |
ee5e770e JS |
653 | struct drm_device *dev, |
654 | struct drm_mode_create_dumb *args) | |
1c248b7d ID |
655 | { |
656 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
2364839a | 657 | int ret; |
1c248b7d | 658 | |
1c248b7d | 659 | /* |
c6b78bc8 | 660 | * allocate memory to be used for framebuffer. |
1c248b7d ID |
661 | * - this callback would be called by user application |
662 | * with DRM_IOCTL_MODE_CREATE_DUMB command. | |
663 | */ | |
664 | ||
3fd6b694 | 665 | args->pitch = args->width * ((args->bpp + 7) / 8); |
7da5907c | 666 | args->size = args->pitch * args->height; |
1c248b7d | 667 | |
69961d8f ID |
668 | exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG | |
669 | EXYNOS_BO_WC, args->size); | |
3fec4532 VS |
670 | /* |
671 | * If physically contiguous memory allocation fails and if IOMMU is | |
672 | * supported then try to get buffer from non physically contiguous | |
673 | * memory area. | |
674 | */ | |
675 | if (IS_ERR(exynos_gem_obj) && is_drm_iommu_supported(dev)) { | |
676 | dev_warn(dev->dev, "contiguous FB allocation failed, falling back to non-contiguous\n"); | |
677 | exynos_gem_obj = exynos_drm_gem_create(dev, | |
678 | EXYNOS_BO_NONCONTIG | EXYNOS_BO_WC, | |
679 | args->size); | |
680 | } | |
681 | ||
1c248b7d ID |
682 | if (IS_ERR(exynos_gem_obj)) |
683 | return PTR_ERR(exynos_gem_obj); | |
684 | ||
2364839a JS |
685 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
686 | &args->handle); | |
687 | if (ret) { | |
688 | exynos_drm_gem_destroy(exynos_gem_obj); | |
689 | return ret; | |
690 | } | |
691 | ||
1c248b7d ID |
692 | return 0; |
693 | } | |
694 | ||
695 | int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, | |
ee5e770e JS |
696 | struct drm_device *dev, uint32_t handle, |
697 | uint64_t *offset) | |
1c248b7d | 698 | { |
1c248b7d | 699 | struct drm_gem_object *obj; |
2d91cf17 | 700 | int ret = 0; |
1c248b7d | 701 | |
1c248b7d ID |
702 | mutex_lock(&dev->struct_mutex); |
703 | ||
704 | /* | |
705 | * get offset of memory allocated for drm framebuffer. | |
706 | * - this callback would be called by user application | |
707 | * with DRM_IOCTL_MODE_MAP_DUMB command. | |
708 | */ | |
709 | ||
710 | obj = drm_gem_object_lookup(dev, file_priv, handle); | |
711 | if (!obj) { | |
712 | DRM_ERROR("failed to lookup gem object.\n"); | |
2d91cf17 JS |
713 | ret = -EINVAL; |
714 | goto unlock; | |
1c248b7d ID |
715 | } |
716 | ||
0de23977 DH |
717 | ret = drm_gem_create_mmap_offset(obj); |
718 | if (ret) | |
719 | goto out; | |
1c248b7d | 720 | |
0de23977 | 721 | *offset = drm_vma_node_offset_addr(&obj->vma_node); |
1c248b7d ID |
722 | DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); |
723 | ||
2d91cf17 JS |
724 | out: |
725 | drm_gem_object_unreference(obj); | |
726 | unlock: | |
1c248b7d | 727 | mutex_unlock(&dev->struct_mutex); |
2d91cf17 | 728 | return ret; |
1c248b7d ID |
729 | } |
730 | ||
731 | int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
732 | { | |
733 | struct drm_gem_object *obj = vma->vm_private_data; | |
1c248b7d | 734 | struct drm_device *dev = obj->dev; |
2b35892e | 735 | unsigned long f_vaddr; |
1c248b7d ID |
736 | pgoff_t page_offset; |
737 | int ret; | |
738 | ||
739 | page_offset = ((unsigned long)vmf->virtual_address - | |
740 | vma->vm_start) >> PAGE_SHIFT; | |
2b35892e | 741 | f_vaddr = (unsigned long)vmf->virtual_address; |
1c248b7d ID |
742 | |
743 | mutex_lock(&dev->struct_mutex); | |
744 | ||
0519f9a1 | 745 | ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset); |
2b35892e | 746 | if (ret < 0) |
0519f9a1 | 747 | DRM_ERROR("failed to map a buffer with user.\n"); |
1c248b7d ID |
748 | |
749 | mutex_unlock(&dev->struct_mutex); | |
750 | ||
751 | return convert_to_vm_err_msg(ret); | |
752 | } | |
753 | ||
754 | int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
755 | { | |
c01d73fa ID |
756 | struct exynos_drm_gem_obj *exynos_gem_obj; |
757 | struct drm_gem_object *obj; | |
1c248b7d ID |
758 | int ret; |
759 | ||
1c248b7d ID |
760 | /* set vm_area_struct. */ |
761 | ret = drm_gem_mmap(filp, vma); | |
762 | if (ret < 0) { | |
763 | DRM_ERROR("failed to mmap.\n"); | |
764 | return ret; | |
765 | } | |
766 | ||
c01d73fa ID |
767 | obj = vma->vm_private_data; |
768 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
769 | ||
770 | ret = check_gem_flags(exynos_gem_obj->flags); | |
771 | if (ret) { | |
772 | drm_gem_vm_close(vma); | |
773 | drm_gem_free_mmap_offset(obj); | |
774 | return ret; | |
775 | } | |
776 | ||
1c248b7d ID |
777 | vma->vm_flags &= ~VM_PFNMAP; |
778 | vma->vm_flags |= VM_MIXEDMAP; | |
779 | ||
c01d73fa ID |
780 | update_vm_cache_attr(exynos_gem_obj, vma); |
781 | ||
1c248b7d ID |
782 | return ret; |
783 | } |