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> |
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 | ||
b2df26c1 | 167 | struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, |
2364839a JS |
168 | unsigned long size) |
169 | { | |
170 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
171 | struct drm_gem_object *obj; | |
172 | int ret; | |
173 | ||
174 | exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); | |
175 | if (!exynos_gem_obj) { | |
176 | DRM_ERROR("failed to allocate exynos gem object\n"); | |
177 | return NULL; | |
178 | } | |
179 | ||
2b35892e | 180 | exynos_gem_obj->size = size; |
2364839a JS |
181 | obj = &exynos_gem_obj->base; |
182 | ||
183 | ret = drm_gem_object_init(dev, obj, size); | |
184 | if (ret < 0) { | |
185 | DRM_ERROR("failed to initialize gem object\n"); | |
186 | kfree(exynos_gem_obj); | |
187 | return NULL; | |
188 | } | |
189 | ||
190 | DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); | |
191 | ||
192 | return exynos_gem_obj; | |
1c248b7d ID |
193 | } |
194 | ||
f088d5a9 | 195 | struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, |
2b35892e ID |
196 | unsigned int flags, |
197 | unsigned long size) | |
f088d5a9 | 198 | { |
2364839a | 199 | struct exynos_drm_gem_obj *exynos_gem_obj; |
2b35892e ID |
200 | struct exynos_drm_gem_buf *buf; |
201 | int ret; | |
f088d5a9 | 202 | |
dcf9af82 ID |
203 | if (!size) { |
204 | DRM_ERROR("invalid size.\n"); | |
205 | return ERR_PTR(-EINVAL); | |
206 | } | |
207 | ||
208 | size = roundup_gem_size(size, flags); | |
209 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
f088d5a9 | 210 | |
dcf9af82 ID |
211 | ret = check_gem_flags(flags); |
212 | if (ret) | |
213 | return ERR_PTR(ret); | |
2b35892e ID |
214 | |
215 | buf = exynos_drm_init_buf(dev, size); | |
216 | if (!buf) | |
ee5e770e | 217 | return ERR_PTR(-ENOMEM); |
f088d5a9 | 218 | |
2364839a JS |
219 | exynos_gem_obj = exynos_drm_gem_init(dev, size); |
220 | if (!exynos_gem_obj) { | |
2b35892e | 221 | ret = -ENOMEM; |
dcf9af82 | 222 | goto err_fini_buf; |
f088d5a9 ID |
223 | } |
224 | ||
2b35892e ID |
225 | exynos_gem_obj->buffer = buf; |
226 | ||
227 | /* set memory type and cache attribute from user side. */ | |
228 | exynos_gem_obj->flags = flags; | |
229 | ||
0519f9a1 ID |
230 | ret = exynos_drm_alloc_buf(dev, buf, flags); |
231 | if (ret < 0) { | |
232 | drm_gem_object_release(&exynos_gem_obj->base); | |
233 | goto err_fini_buf; | |
2b35892e | 234 | } |
f088d5a9 ID |
235 | |
236 | return exynos_gem_obj; | |
dcf9af82 ID |
237 | |
238 | err_fini_buf: | |
2b35892e ID |
239 | exynos_drm_fini_buf(dev, buf); |
240 | return ERR_PTR(ret); | |
f088d5a9 ID |
241 | } |
242 | ||
1c248b7d | 243 | int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, |
ee5e770e | 244 | struct drm_file *file_priv) |
1c248b7d ID |
245 | { |
246 | struct drm_exynos_gem_create *args = data; | |
ee5e770e | 247 | struct exynos_drm_gem_obj *exynos_gem_obj; |
2364839a | 248 | int ret; |
1c248b7d | 249 | |
f088d5a9 | 250 | DRM_DEBUG_KMS("%s\n", __FILE__); |
1c248b7d | 251 | |
2b35892e | 252 | exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
1c248b7d ID |
253 | if (IS_ERR(exynos_gem_obj)) |
254 | return PTR_ERR(exynos_gem_obj); | |
255 | ||
2364839a JS |
256 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
257 | &args->handle); | |
258 | if (ret) { | |
259 | exynos_drm_gem_destroy(exynos_gem_obj); | |
260 | return ret; | |
261 | } | |
262 | ||
1c248b7d ID |
263 | return 0; |
264 | } | |
265 | ||
d87342c1 | 266 | dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, |
f0b1bda7 | 267 | unsigned int gem_handle, |
d87342c1 | 268 | struct drm_file *filp) |
f0b1bda7 ID |
269 | { |
270 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
271 | struct drm_gem_object *obj; | |
272 | ||
d87342c1 | 273 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
f0b1bda7 ID |
274 | if (!obj) { |
275 | DRM_ERROR("failed to lookup gem object.\n"); | |
276 | return ERR_PTR(-EINVAL); | |
277 | } | |
278 | ||
279 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
280 | ||
f0b1bda7 ID |
281 | return &exynos_gem_obj->buffer->dma_addr; |
282 | } | |
283 | ||
284 | void exynos_drm_gem_put_dma_addr(struct drm_device *dev, | |
285 | unsigned int gem_handle, | |
d87342c1 | 286 | struct drm_file *filp) |
f0b1bda7 ID |
287 | { |
288 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
289 | struct drm_gem_object *obj; | |
290 | ||
d87342c1 | 291 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
f0b1bda7 ID |
292 | if (!obj) { |
293 | DRM_ERROR("failed to lookup gem object.\n"); | |
294 | return; | |
295 | } | |
296 | ||
297 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
298 | ||
f0b1bda7 ID |
299 | drm_gem_object_unreference_unlocked(obj); |
300 | ||
301 | /* | |
302 | * decrease obj->refcount one more time because we has already | |
303 | * increased it at exynos_drm_gem_get_dma_addr(). | |
304 | */ | |
305 | drm_gem_object_unreference_unlocked(obj); | |
306 | } | |
307 | ||
1c248b7d | 308 | int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, |
ee5e770e | 309 | struct drm_file *file_priv) |
1c248b7d ID |
310 | { |
311 | struct drm_exynos_gem_map_off *args = data; | |
312 | ||
313 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
314 | ||
315 | DRM_DEBUG_KMS("handle = 0x%x, offset = 0x%lx\n", | |
316 | args->handle, (unsigned long)args->offset); | |
317 | ||
318 | if (!(dev->driver->driver_features & DRIVER_GEM)) { | |
319 | DRM_ERROR("does not support GEM.\n"); | |
320 | return -ENODEV; | |
321 | } | |
322 | ||
323 | return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle, | |
324 | &args->offset); | |
325 | } | |
326 | ||
5b07c660 ID |
327 | static struct drm_file *exynos_drm_find_drm_file(struct drm_device *drm_dev, |
328 | struct file *filp) | |
329 | { | |
330 | struct drm_file *file_priv; | |
331 | ||
332 | mutex_lock(&drm_dev->struct_mutex); | |
333 | ||
334 | /* find current process's drm_file from filelist. */ | |
335 | list_for_each_entry(file_priv, &drm_dev->filelist, lhead) { | |
336 | if (file_priv->filp == filp) { | |
337 | mutex_unlock(&drm_dev->struct_mutex); | |
338 | return file_priv; | |
339 | } | |
340 | } | |
341 | ||
342 | mutex_unlock(&drm_dev->struct_mutex); | |
343 | WARN_ON(1); | |
344 | ||
345 | return ERR_PTR(-EFAULT); | |
346 | } | |
347 | ||
1c248b7d | 348 | static int exynos_drm_gem_mmap_buffer(struct file *filp, |
ee5e770e | 349 | struct vm_area_struct *vma) |
1c248b7d ID |
350 | { |
351 | struct drm_gem_object *obj = filp->private_data; | |
352 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); | |
5b07c660 | 353 | struct drm_device *drm_dev = obj->dev; |
2c871127 | 354 | struct exynos_drm_gem_buf *buffer; |
5b07c660 | 355 | struct drm_file *file_priv; |
0519f9a1 | 356 | unsigned long vm_size; |
5b07c660 | 357 | int ret; |
1c248b7d ID |
358 | |
359 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
360 | ||
314e51b9 | 361 | vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; |
5b07c660 ID |
362 | vma->vm_private_data = obj; |
363 | vma->vm_ops = drm_dev->driver->gem_vm_ops; | |
364 | ||
365 | /* restore it to driver's fops. */ | |
366 | filp->f_op = fops_get(drm_dev->driver->fops); | |
367 | ||
368 | file_priv = exynos_drm_find_drm_file(drm_dev, filp); | |
369 | if (IS_ERR(file_priv)) | |
370 | return PTR_ERR(file_priv); | |
371 | ||
372 | /* restore it to drm_file. */ | |
373 | filp->private_data = file_priv; | |
1c248b7d | 374 | |
c01d73fa | 375 | update_vm_cache_attr(exynos_gem_obj, vma); |
1c248b7d | 376 | |
0519f9a1 | 377 | vm_size = vma->vm_end - vma->vm_start; |
2b35892e | 378 | |
1c248b7d | 379 | /* |
2c871127 | 380 | * a buffer contains information to physically continuous memory |
1c248b7d ID |
381 | * allocated by user request or at framebuffer creation. |
382 | */ | |
2c871127 | 383 | buffer = exynos_gem_obj->buffer; |
1c248b7d ID |
384 | |
385 | /* check if user-requested size is valid. */ | |
2c871127 | 386 | if (vm_size > buffer->size) |
1c248b7d ID |
387 | return -EINVAL; |
388 | ||
4744ad24 | 389 | ret = dma_mmap_attrs(drm_dev->dev, vma, buffer->pages, |
0519f9a1 ID |
390 | buffer->dma_addr, buffer->size, |
391 | &buffer->dma_attrs); | |
5b07c660 ID |
392 | if (ret < 0) { |
393 | DRM_ERROR("failed to mmap.\n"); | |
394 | return ret; | |
395 | } | |
396 | ||
397 | /* | |
398 | * take a reference to this mapping of the object. And this reference | |
399 | * is unreferenced by the corresponding vm_close call. | |
400 | */ | |
401 | drm_gem_object_reference(obj); | |
402 | ||
403 | mutex_lock(&drm_dev->struct_mutex); | |
404 | drm_vm_open_locked(drm_dev, vma); | |
405 | mutex_unlock(&drm_dev->struct_mutex); | |
406 | ||
407 | return 0; | |
1c248b7d ID |
408 | } |
409 | ||
410 | static const struct file_operations exynos_drm_gem_fops = { | |
411 | .mmap = exynos_drm_gem_mmap_buffer, | |
412 | }; | |
413 | ||
414 | int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
ee5e770e | 415 | struct drm_file *file_priv) |
1c248b7d ID |
416 | { |
417 | struct drm_exynos_gem_mmap *args = data; | |
418 | struct drm_gem_object *obj; | |
419 | unsigned int addr; | |
420 | ||
421 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
422 | ||
423 | if (!(dev->driver->driver_features & DRIVER_GEM)) { | |
424 | DRM_ERROR("does not support GEM.\n"); | |
425 | return -ENODEV; | |
426 | } | |
427 | ||
428 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
429 | if (!obj) { | |
430 | DRM_ERROR("failed to lookup gem object.\n"); | |
431 | return -EINVAL; | |
432 | } | |
433 | ||
5b07c660 ID |
434 | /* |
435 | * Set specific mmper's fops. And it will be restored by | |
436 | * exynos_drm_gem_mmap_buffer to dev->driver->fops. | |
437 | * This is used to call specific mapper temporarily. | |
438 | */ | |
439 | file_priv->filp->f_op = &exynos_drm_gem_fops; | |
1c248b7d | 440 | |
5b07c660 ID |
441 | /* |
442 | * Set gem object to private_data so that specific mmaper | |
443 | * can get the gem object. And it will be restored by | |
444 | * exynos_drm_gem_mmap_buffer to drm_file. | |
445 | */ | |
446 | file_priv->filp->private_data = obj; | |
447 | ||
448 | addr = vm_mmap(file_priv->filp, 0, args->size, | |
1c248b7d | 449 | PROT_READ | PROT_WRITE, MAP_SHARED, 0); |
1c248b7d ID |
450 | |
451 | drm_gem_object_unreference_unlocked(obj); | |
452 | ||
5b07c660 ID |
453 | if (IS_ERR((void *)addr)) { |
454 | file_priv->filp->private_data = file_priv; | |
1c248b7d | 455 | return PTR_ERR((void *)addr); |
5b07c660 | 456 | } |
1c248b7d ID |
457 | |
458 | args->mapped = addr; | |
459 | ||
460 | DRM_DEBUG_KMS("mapped = 0x%lx\n", (unsigned long)args->mapped); | |
461 | ||
462 | return 0; | |
463 | } | |
464 | ||
40cd7e0c ID |
465 | int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, |
466 | struct drm_file *file_priv) | |
467 | { struct exynos_drm_gem_obj *exynos_gem_obj; | |
468 | struct drm_exynos_gem_info *args = data; | |
469 | struct drm_gem_object *obj; | |
470 | ||
471 | mutex_lock(&dev->struct_mutex); | |
472 | ||
473 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
474 | if (!obj) { | |
475 | DRM_ERROR("failed to lookup gem object.\n"); | |
476 | mutex_unlock(&dev->struct_mutex); | |
477 | return -EINVAL; | |
478 | } | |
479 | ||
480 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
481 | ||
482 | args->flags = exynos_gem_obj->flags; | |
483 | args->size = exynos_gem_obj->size; | |
484 | ||
485 | drm_gem_object_unreference(obj); | |
486 | mutex_unlock(&dev->struct_mutex); | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
2a3098ff ID |
491 | struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma) |
492 | { | |
493 | struct vm_area_struct *vma_copy; | |
494 | ||
495 | vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL); | |
496 | if (!vma_copy) | |
497 | return NULL; | |
498 | ||
499 | if (vma->vm_ops && vma->vm_ops->open) | |
500 | vma->vm_ops->open(vma); | |
501 | ||
502 | if (vma->vm_file) | |
503 | get_file(vma->vm_file); | |
504 | ||
505 | memcpy(vma_copy, vma, sizeof(*vma)); | |
506 | ||
507 | vma_copy->vm_mm = NULL; | |
508 | vma_copy->vm_next = NULL; | |
509 | vma_copy->vm_prev = NULL; | |
510 | ||
511 | return vma_copy; | |
512 | } | |
513 | ||
514 | void exynos_gem_put_vma(struct vm_area_struct *vma) | |
515 | { | |
516 | if (!vma) | |
517 | return; | |
518 | ||
519 | if (vma->vm_ops && vma->vm_ops->close) | |
520 | vma->vm_ops->close(vma); | |
521 | ||
522 | if (vma->vm_file) | |
523 | fput(vma->vm_file); | |
524 | ||
525 | kfree(vma); | |
526 | } | |
527 | ||
528 | int exynos_gem_get_pages_from_userptr(unsigned long start, | |
529 | unsigned int npages, | |
530 | struct page **pages, | |
531 | struct vm_area_struct *vma) | |
532 | { | |
533 | int get_npages; | |
534 | ||
535 | /* the memory region mmaped with VM_PFNMAP. */ | |
536 | if (vma_is_io(vma)) { | |
537 | unsigned int i; | |
538 | ||
539 | for (i = 0; i < npages; ++i, start += PAGE_SIZE) { | |
540 | unsigned long pfn; | |
541 | int ret = follow_pfn(vma, start, &pfn); | |
542 | if (ret) | |
543 | return ret; | |
544 | ||
545 | pages[i] = pfn_to_page(pfn); | |
546 | } | |
547 | ||
548 | if (i != npages) { | |
549 | DRM_ERROR("failed to get user_pages.\n"); | |
550 | return -EINVAL; | |
551 | } | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | get_npages = get_user_pages(current, current->mm, start, | |
557 | npages, 1, 1, pages, NULL); | |
558 | get_npages = max(get_npages, 0); | |
559 | if (get_npages != npages) { | |
560 | DRM_ERROR("failed to get user_pages.\n"); | |
561 | while (get_npages) | |
562 | put_page(pages[--get_npages]); | |
563 | return -EFAULT; | |
564 | } | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | void exynos_gem_put_pages_to_userptr(struct page **pages, | |
570 | unsigned int npages, | |
571 | struct vm_area_struct *vma) | |
572 | { | |
573 | if (!vma_is_io(vma)) { | |
574 | unsigned int i; | |
575 | ||
576 | for (i = 0; i < npages; i++) { | |
577 | set_page_dirty_lock(pages[i]); | |
578 | ||
579 | /* | |
580 | * undo the reference we took when populating | |
581 | * the table. | |
582 | */ | |
583 | put_page(pages[i]); | |
584 | } | |
585 | } | |
586 | } | |
587 | ||
588 | int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, | |
589 | struct sg_table *sgt, | |
590 | enum dma_data_direction dir) | |
591 | { | |
592 | int nents; | |
593 | ||
594 | mutex_lock(&drm_dev->struct_mutex); | |
595 | ||
596 | nents = dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); | |
597 | if (!nents) { | |
598 | DRM_ERROR("failed to map sgl with dma.\n"); | |
599 | mutex_unlock(&drm_dev->struct_mutex); | |
600 | return nents; | |
601 | } | |
602 | ||
603 | mutex_unlock(&drm_dev->struct_mutex); | |
604 | return 0; | |
605 | } | |
606 | ||
607 | void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, | |
608 | struct sg_table *sgt, | |
609 | enum dma_data_direction dir) | |
610 | { | |
611 | dma_unmap_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); | |
612 | } | |
613 | ||
1c248b7d ID |
614 | int exynos_drm_gem_init_object(struct drm_gem_object *obj) |
615 | { | |
616 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
ee5e770e | 621 | void exynos_drm_gem_free_object(struct drm_gem_object *obj) |
1c248b7d | 622 | { |
b2df26c1 ID |
623 | struct exynos_drm_gem_obj *exynos_gem_obj; |
624 | struct exynos_drm_gem_buf *buf; | |
625 | ||
1c248b7d ID |
626 | DRM_DEBUG_KMS("%s\n", __FILE__); |
627 | ||
b2df26c1 ID |
628 | exynos_gem_obj = to_exynos_gem_obj(obj); |
629 | buf = exynos_gem_obj->buffer; | |
630 | ||
631 | if (obj->import_attach) | |
632 | drm_prime_gem_destroy(obj, buf->sgt); | |
633 | ||
2364839a | 634 | exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); |
1c248b7d ID |
635 | } |
636 | ||
637 | int exynos_drm_gem_dumb_create(struct drm_file *file_priv, | |
ee5e770e JS |
638 | struct drm_device *dev, |
639 | struct drm_mode_create_dumb *args) | |
1c248b7d ID |
640 | { |
641 | struct exynos_drm_gem_obj *exynos_gem_obj; | |
2364839a | 642 | int ret; |
1c248b7d ID |
643 | |
644 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
645 | ||
646 | /* | |
647 | * alocate memory to be used for framebuffer. | |
648 | * - this callback would be called by user application | |
649 | * with DRM_IOCTL_MODE_CREATE_DUMB command. | |
650 | */ | |
651 | ||
3fd6b694 | 652 | args->pitch = args->width * ((args->bpp + 7) / 8); |
7da5907c | 653 | args->size = args->pitch * args->height; |
1c248b7d | 654 | |
2b35892e | 655 | exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
1c248b7d ID |
656 | if (IS_ERR(exynos_gem_obj)) |
657 | return PTR_ERR(exynos_gem_obj); | |
658 | ||
2364839a JS |
659 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
660 | &args->handle); | |
661 | if (ret) { | |
662 | exynos_drm_gem_destroy(exynos_gem_obj); | |
663 | return ret; | |
664 | } | |
665 | ||
1c248b7d ID |
666 | return 0; |
667 | } | |
668 | ||
669 | int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, | |
ee5e770e JS |
670 | struct drm_device *dev, uint32_t handle, |
671 | uint64_t *offset) | |
1c248b7d | 672 | { |
1c248b7d | 673 | struct drm_gem_object *obj; |
2d91cf17 | 674 | int ret = 0; |
1c248b7d ID |
675 | |
676 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
677 | ||
678 | mutex_lock(&dev->struct_mutex); | |
679 | ||
680 | /* | |
681 | * get offset of memory allocated for drm framebuffer. | |
682 | * - this callback would be called by user application | |
683 | * with DRM_IOCTL_MODE_MAP_DUMB command. | |
684 | */ | |
685 | ||
686 | obj = drm_gem_object_lookup(dev, file_priv, handle); | |
687 | if (!obj) { | |
688 | DRM_ERROR("failed to lookup gem object.\n"); | |
2d91cf17 JS |
689 | ret = -EINVAL; |
690 | goto unlock; | |
1c248b7d ID |
691 | } |
692 | ||
6037bafa LP |
693 | if (!obj->map_list.map) { |
694 | ret = drm_gem_create_mmap_offset(obj); | |
2d91cf17 JS |
695 | if (ret) |
696 | goto out; | |
697 | } | |
1c248b7d | 698 | |
6037bafa | 699 | *offset = (u64)obj->map_list.hash.key << PAGE_SHIFT; |
1c248b7d ID |
700 | DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); |
701 | ||
2d91cf17 JS |
702 | out: |
703 | drm_gem_object_unreference(obj); | |
704 | unlock: | |
1c248b7d | 705 | mutex_unlock(&dev->struct_mutex); |
2d91cf17 | 706 | return ret; |
1c248b7d ID |
707 | } |
708 | ||
ee5e770e JS |
709 | int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, |
710 | struct drm_device *dev, | |
711 | unsigned int handle) | |
712 | { | |
713 | int ret; | |
714 | ||
715 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
716 | ||
717 | /* | |
718 | * obj->refcount and obj->handle_count are decreased and | |
719 | * if both them are 0 then exynos_drm_gem_free_object() | |
720 | * would be called by callback to release resources. | |
721 | */ | |
722 | ret = drm_gem_handle_delete(file_priv, handle); | |
723 | if (ret < 0) { | |
724 | DRM_ERROR("failed to delete drm_gem_handle.\n"); | |
725 | return ret; | |
726 | } | |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
1c248b7d ID |
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 | ||
760 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
761 | ||
762 | /* set vm_area_struct. */ | |
763 | ret = drm_gem_mmap(filp, vma); | |
764 | if (ret < 0) { | |
765 | DRM_ERROR("failed to mmap.\n"); | |
766 | return ret; | |
767 | } | |
768 | ||
c01d73fa ID |
769 | obj = vma->vm_private_data; |
770 | exynos_gem_obj = to_exynos_gem_obj(obj); | |
771 | ||
772 | ret = check_gem_flags(exynos_gem_obj->flags); | |
773 | if (ret) { | |
774 | drm_gem_vm_close(vma); | |
775 | drm_gem_free_mmap_offset(obj); | |
776 | return ret; | |
777 | } | |
778 | ||
1c248b7d ID |
779 | vma->vm_flags &= ~VM_PFNMAP; |
780 | vma->vm_flags |= VM_MIXEDMAP; | |
781 | ||
c01d73fa ID |
782 | update_vm_cache_attr(exynos_gem_obj, vma); |
783 | ||
1c248b7d ID |
784 | return ret; |
785 | } |