1 | /* |
2 | * Copyright (c) 2016 Intel Corporation |
3 | * |
4 | * Permission to use, copy, modify, distribute, and sell this software and its |
5 | * documentation for any purpose is hereby granted without fee, provided that |
6 | * the above copyright notice appear in all copies and that both that copyright |
7 | * notice and this permission notice appear in supporting documentation, and |
8 | * that the name of the copyright holders not be used in advertising or |
9 | * publicity pertaining to distribution of the software without specific, |
10 | * written prior permission. The copyright holders make no representations |
11 | * about the suitability of this software for any purpose. It is provided "as |
12 | * is" without express or implied warranty. |
13 | * |
14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
20 | * OF THIS SOFTWARE. |
21 | */ |
22 | |
23 | #include <linux/export.h> |
24 | #include <linux/uaccess.h> |
25 | |
26 | #include <drm/drm_atomic.h> |
27 | #include <drm/drm_atomic_uapi.h> |
28 | #include <drm/drm_auth.h> |
29 | #include <drm/drm_debugfs.h> |
30 | #include <drm/drm_drv.h> |
31 | #include <drm/drm_file.h> |
32 | #include <drm/drm_fourcc.h> |
33 | #include <drm/drm_framebuffer.h> |
34 | #include <drm/drm_gem.h> |
35 | #include <drm/drm_print.h> |
36 | #include <drm/drm_util.h> |
37 | |
38 | #include "drm_crtc_internal.h" |
39 | #include "drm_internal.h" |
40 | |
41 | /** |
42 | * DOC: overview |
43 | * |
44 | * Frame buffers are abstract memory objects that provide a source of pixels to |
45 | * scanout to a CRTC. Applications explicitly request the creation of frame |
46 | * buffers through the DRM_IOCTL_MODE_ADDFB(2) ioctls and receive an opaque |
47 | * handle that can be passed to the KMS CRTC control, plane configuration and |
48 | * page flip functions. |
49 | * |
50 | * Frame buffers rely on the underlying memory manager for allocating backing |
51 | * storage. When creating a frame buffer applications pass a memory handle |
52 | * (or a list of memory handles for multi-planar formats) through the |
53 | * &struct drm_mode_fb_cmd2 argument. For drivers using GEM as their userspace |
54 | * buffer management interface this would be a GEM handle. Drivers are however |
55 | * free to use their own backing storage object handles, e.g. vmwgfx directly |
56 | * exposes special TTM handles to userspace and so expects TTM handles in the |
57 | * create ioctl and not GEM handles. |
58 | * |
59 | * Framebuffers are tracked with &struct drm_framebuffer. They are published |
60 | * using drm_framebuffer_init() - after calling that function userspace can use |
61 | * and access the framebuffer object. The helper function |
62 | * drm_helper_mode_fill_fb_struct() can be used to pre-fill the required |
63 | * metadata fields. |
64 | * |
65 | * The lifetime of a drm framebuffer is controlled with a reference count, |
66 | * drivers can grab additional references with drm_framebuffer_get() and drop |
67 | * them again with drm_framebuffer_put(). For driver-private framebuffers for |
68 | * which the last reference is never dropped (e.g. for the fbdev framebuffer |
69 | * when the struct &struct drm_framebuffer is embedded into the fbdev helper |
70 | * struct) drivers can manually clean up a framebuffer at module unload time |
71 | * with drm_framebuffer_unregister_private(). But doing this is not |
72 | * recommended, and it's better to have a normal free-standing &struct |
73 | * drm_framebuffer. |
74 | */ |
75 | |
76 | int drm_framebuffer_check_src_coords(uint32_t src_x, uint32_t src_y, |
77 | uint32_t src_w, uint32_t src_h, |
78 | const struct drm_framebuffer *fb) |
79 | { |
80 | unsigned int fb_width, fb_height; |
81 | |
82 | fb_width = fb->width << 16; |
83 | fb_height = fb->height << 16; |
84 | |
85 | /* Make sure source coordinates are inside the fb. */ |
86 | if (src_w > fb_width || |
87 | src_x > fb_width - src_w || |
88 | src_h > fb_height || |
89 | src_y > fb_height - src_h) { |
90 | drm_dbg_kms(fb->dev, "Invalid source coordinates " |
91 | "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n" , |
92 | src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, |
93 | src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, |
94 | src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, |
95 | src_y >> 16, ((src_y & 0xffff) * 15625) >> 10, |
96 | fb->width, fb->height); |
97 | return -ENOSPC; |
98 | } |
99 | |
100 | return 0; |
101 | } |
102 | |
103 | /** |
104 | * drm_mode_addfb - add an FB to the graphics configuration |
105 | * @dev: drm device for the ioctl |
106 | * @or: pointer to request structure |
107 | * @file_priv: drm file |
108 | * |
109 | * Add a new FB to the specified CRTC, given a user request. This is the |
110 | * original addfb ioctl which only supported RGB formats. |
111 | * |
112 | * Called by the user via ioctl, or by an in-kernel client. |
113 | * |
114 | * Returns: |
115 | * Zero on success, negative errno on failure. |
116 | */ |
117 | int drm_mode_addfb(struct drm_device *dev, struct drm_mode_fb_cmd *or, |
118 | struct drm_file *file_priv) |
119 | { |
120 | struct drm_mode_fb_cmd2 r = {}; |
121 | int ret; |
122 | |
123 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) |
124 | return -EOPNOTSUPP; |
125 | |
126 | r.pixel_format = drm_driver_legacy_fb_format(dev, bpp: or->bpp, depth: or->depth); |
127 | if (r.pixel_format == DRM_FORMAT_INVALID) { |
128 | drm_dbg_kms(dev, "bad {bpp:%d, depth:%d}\n" , or->bpp, or->depth); |
129 | return -EINVAL; |
130 | } |
131 | |
132 | /* convert to new format and call new ioctl */ |
133 | r.fb_id = or->fb_id; |
134 | r.width = or->width; |
135 | r.height = or->height; |
136 | r.pitches[0] = or->pitch; |
137 | r.handles[0] = or->handle; |
138 | |
139 | ret = drm_mode_addfb2(dev, data: &r, file_priv); |
140 | if (ret) |
141 | return ret; |
142 | |
143 | or->fb_id = r.fb_id; |
144 | |
145 | return 0; |
146 | } |
147 | |
148 | int drm_mode_addfb_ioctl(struct drm_device *dev, |
149 | void *data, struct drm_file *file_priv) |
150 | { |
151 | return drm_mode_addfb(dev, or: data, file_priv); |
152 | } |
153 | |
154 | static int framebuffer_check(struct drm_device *dev, |
155 | const struct drm_mode_fb_cmd2 *r) |
156 | { |
157 | const struct drm_format_info *info; |
158 | int i; |
159 | |
160 | /* check if the format is supported at all */ |
161 | if (!__drm_format_info(format: r->pixel_format)) { |
162 | drm_dbg_kms(dev, "bad framebuffer format %p4cc\n" , |
163 | &r->pixel_format); |
164 | return -EINVAL; |
165 | } |
166 | |
167 | if (r->width == 0) { |
168 | drm_dbg_kms(dev, "bad framebuffer width %u\n" , r->width); |
169 | return -EINVAL; |
170 | } |
171 | |
172 | if (r->height == 0) { |
173 | drm_dbg_kms(dev, "bad framebuffer height %u\n" , r->height); |
174 | return -EINVAL; |
175 | } |
176 | |
177 | /* now let the driver pick its own format info */ |
178 | info = drm_get_format_info(dev, mode_cmd: r); |
179 | |
180 | for (i = 0; i < info->num_planes; i++) { |
181 | unsigned int width = drm_format_info_plane_width(info, width: r->width, plane: i); |
182 | unsigned int height = drm_format_info_plane_height(info, height: r->height, plane: i); |
183 | unsigned int block_size = info->char_per_block[i]; |
184 | u64 min_pitch = drm_format_info_min_pitch(info, plane: i, buffer_width: width); |
185 | |
186 | if (!block_size && (r->modifier[i] == DRM_FORMAT_MOD_LINEAR)) { |
187 | drm_dbg_kms(dev, "Format requires non-linear modifier for plane %d\n" , i); |
188 | return -EINVAL; |
189 | } |
190 | |
191 | if (!r->handles[i]) { |
192 | drm_dbg_kms(dev, "no buffer object handle for plane %d\n" , i); |
193 | return -EINVAL; |
194 | } |
195 | |
196 | if (min_pitch > UINT_MAX) |
197 | return -ERANGE; |
198 | |
199 | if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) |
200 | return -ERANGE; |
201 | |
202 | if (block_size && r->pitches[i] < min_pitch) { |
203 | drm_dbg_kms(dev, "bad pitch %u for plane %d\n" , r->pitches[i], i); |
204 | return -EINVAL; |
205 | } |
206 | |
207 | if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { |
208 | drm_dbg_kms(dev, "bad fb modifier %llu for plane %d\n" , |
209 | r->modifier[i], i); |
210 | return -EINVAL; |
211 | } |
212 | |
213 | if (r->flags & DRM_MODE_FB_MODIFIERS && |
214 | r->modifier[i] != r->modifier[0]) { |
215 | drm_dbg_kms(dev, "bad fb modifier %llu for plane %d\n" , |
216 | r->modifier[i], i); |
217 | return -EINVAL; |
218 | } |
219 | |
220 | /* modifier specific checks: */ |
221 | switch (r->modifier[i]) { |
222 | case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: |
223 | /* NOTE: the pitch restriction may be lifted later if it turns |
224 | * out that no hw has this restriction: |
225 | */ |
226 | if (r->pixel_format != DRM_FORMAT_NV12 || |
227 | width % 128 || height % 32 || |
228 | r->pitches[i] % 128) { |
229 | drm_dbg_kms(dev, "bad modifier data for plane %d\n" , i); |
230 | return -EINVAL; |
231 | } |
232 | break; |
233 | |
234 | default: |
235 | break; |
236 | } |
237 | } |
238 | |
239 | for (i = info->num_planes; i < 4; i++) { |
240 | if (r->modifier[i]) { |
241 | drm_dbg_kms(dev, "non-zero modifier for unused plane %d\n" , i); |
242 | return -EINVAL; |
243 | } |
244 | |
245 | /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ |
246 | if (!(r->flags & DRM_MODE_FB_MODIFIERS)) |
247 | continue; |
248 | |
249 | if (r->handles[i]) { |
250 | drm_dbg_kms(dev, "buffer object handle for unused plane %d\n" , i); |
251 | return -EINVAL; |
252 | } |
253 | |
254 | if (r->pitches[i]) { |
255 | drm_dbg_kms(dev, "non-zero pitch for unused plane %d\n" , i); |
256 | return -EINVAL; |
257 | } |
258 | |
259 | if (r->offsets[i]) { |
260 | drm_dbg_kms(dev, "non-zero offset for unused plane %d\n" , i); |
261 | return -EINVAL; |
262 | } |
263 | } |
264 | |
265 | return 0; |
266 | } |
267 | |
268 | struct drm_framebuffer * |
269 | drm_internal_framebuffer_create(struct drm_device *dev, |
270 | const struct drm_mode_fb_cmd2 *r, |
271 | struct drm_file *file_priv) |
272 | { |
273 | struct drm_mode_config *config = &dev->mode_config; |
274 | struct drm_framebuffer *fb; |
275 | int ret; |
276 | |
277 | if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { |
278 | drm_dbg_kms(dev, "bad framebuffer flags 0x%08x\n" , r->flags); |
279 | return ERR_PTR(error: -EINVAL); |
280 | } |
281 | |
282 | if ((config->min_width > r->width) || (r->width > config->max_width)) { |
283 | drm_dbg_kms(dev, "bad framebuffer width %d, should be >= %d && <= %d\n" , |
284 | r->width, config->min_width, config->max_width); |
285 | return ERR_PTR(error: -EINVAL); |
286 | } |
287 | if ((config->min_height > r->height) || (r->height > config->max_height)) { |
288 | drm_dbg_kms(dev, "bad framebuffer height %d, should be >= %d && <= %d\n" , |
289 | r->height, config->min_height, config->max_height); |
290 | return ERR_PTR(error: -EINVAL); |
291 | } |
292 | |
293 | if (r->flags & DRM_MODE_FB_MODIFIERS && |
294 | dev->mode_config.fb_modifiers_not_supported) { |
295 | drm_dbg_kms(dev, "driver does not support fb modifiers\n" ); |
296 | return ERR_PTR(error: -EINVAL); |
297 | } |
298 | |
299 | ret = framebuffer_check(dev, r); |
300 | if (ret) |
301 | return ERR_PTR(error: ret); |
302 | |
303 | fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); |
304 | if (IS_ERR(ptr: fb)) { |
305 | drm_dbg_kms(dev, "could not create framebuffer\n" ); |
306 | return fb; |
307 | } |
308 | |
309 | return fb; |
310 | } |
311 | EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_internal_framebuffer_create); |
312 | |
313 | /** |
314 | * drm_mode_addfb2 - add an FB to the graphics configuration |
315 | * @dev: drm device for the ioctl |
316 | * @data: data pointer for the ioctl |
317 | * @file_priv: drm file for the ioctl call |
318 | * |
319 | * Add a new FB to the specified CRTC, given a user request with format. This is |
320 | * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers |
321 | * and uses fourcc codes as pixel format specifiers. |
322 | * |
323 | * Called by the user via ioctl. |
324 | * |
325 | * Returns: |
326 | * Zero on success, negative errno on failure. |
327 | */ |
328 | int drm_mode_addfb2(struct drm_device *dev, |
329 | void *data, struct drm_file *file_priv) |
330 | { |
331 | struct drm_mode_fb_cmd2 *r = data; |
332 | struct drm_framebuffer *fb; |
333 | |
334 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) |
335 | return -EOPNOTSUPP; |
336 | |
337 | fb = drm_internal_framebuffer_create(dev, r, file_priv); |
338 | if (IS_ERR(ptr: fb)) |
339 | return PTR_ERR(ptr: fb); |
340 | |
341 | drm_dbg_kms(dev, "[FB:%d]\n" , fb->base.id); |
342 | r->fb_id = fb->base.id; |
343 | |
344 | /* Transfer ownership to the filp for reaping on close */ |
345 | mutex_lock(&file_priv->fbs_lock); |
346 | list_add(new: &fb->filp_head, head: &file_priv->fbs); |
347 | mutex_unlock(lock: &file_priv->fbs_lock); |
348 | |
349 | return 0; |
350 | } |
351 | |
352 | int drm_mode_addfb2_ioctl(struct drm_device *dev, |
353 | void *data, struct drm_file *file_priv) |
354 | { |
355 | #ifdef __BIG_ENDIAN |
356 | if (!dev->mode_config.quirk_addfb_prefer_host_byte_order) { |
357 | /* |
358 | * Drivers must set the |
359 | * quirk_addfb_prefer_host_byte_order quirk to make |
360 | * the drm_mode_addfb() compat code work correctly on |
361 | * bigendian machines. |
362 | * |
363 | * If they don't they interpret pixel_format values |
364 | * incorrectly for bug compatibility, which in turn |
365 | * implies the ADDFB2 ioctl does not work correctly |
366 | * then. So block it to make userspace fallback to |
367 | * ADDFB. |
368 | */ |
369 | drm_dbg_kms(dev, "addfb2 broken on bigendian" ); |
370 | return -EOPNOTSUPP; |
371 | } |
372 | #endif |
373 | return drm_mode_addfb2(dev, data, file_priv); |
374 | } |
375 | |
376 | struct drm_mode_rmfb_work { |
377 | struct work_struct work; |
378 | struct list_head fbs; |
379 | }; |
380 | |
381 | static void drm_mode_rmfb_work_fn(struct work_struct *w) |
382 | { |
383 | struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work); |
384 | |
385 | while (!list_empty(head: &arg->fbs)) { |
386 | struct drm_framebuffer *fb = |
387 | list_first_entry(&arg->fbs, typeof(*fb), filp_head); |
388 | |
389 | drm_dbg_kms(fb->dev, |
390 | "Removing [FB:%d] from all active usage due to RMFB ioctl\n" , |
391 | fb->base.id); |
392 | list_del_init(entry: &fb->filp_head); |
393 | drm_framebuffer_remove(fb); |
394 | } |
395 | } |
396 | |
397 | /** |
398 | * drm_mode_rmfb - remove an FB from the configuration |
399 | * @dev: drm device |
400 | * @fb_id: id of framebuffer to remove |
401 | * @file_priv: drm file |
402 | * |
403 | * Remove the specified FB. |
404 | * |
405 | * Called by the user via ioctl, or by an in-kernel client. |
406 | * |
407 | * Returns: |
408 | * Zero on success, negative errno on failure. |
409 | */ |
410 | int drm_mode_rmfb(struct drm_device *dev, u32 fb_id, |
411 | struct drm_file *file_priv) |
412 | { |
413 | struct drm_framebuffer *fb = NULL; |
414 | struct drm_framebuffer *fbl = NULL; |
415 | int found = 0; |
416 | |
417 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) |
418 | return -EOPNOTSUPP; |
419 | |
420 | fb = drm_framebuffer_lookup(dev, file_priv, id: fb_id); |
421 | if (!fb) |
422 | return -ENOENT; |
423 | |
424 | mutex_lock(&file_priv->fbs_lock); |
425 | list_for_each_entry(fbl, &file_priv->fbs, filp_head) |
426 | if (fb == fbl) |
427 | found = 1; |
428 | if (!found) { |
429 | mutex_unlock(lock: &file_priv->fbs_lock); |
430 | goto fail_unref; |
431 | } |
432 | |
433 | list_del_init(entry: &fb->filp_head); |
434 | mutex_unlock(lock: &file_priv->fbs_lock); |
435 | |
436 | /* drop the reference we picked up in framebuffer lookup */ |
437 | drm_framebuffer_put(fb); |
438 | |
439 | /* |
440 | * we now own the reference that was stored in the fbs list |
441 | * |
442 | * drm_framebuffer_remove may fail with -EINTR on pending signals, |
443 | * so run this in a separate stack as there's no way to correctly |
444 | * handle this after the fb is already removed from the lookup table. |
445 | */ |
446 | if (drm_framebuffer_read_refcount(fb) > 1) { |
447 | struct drm_mode_rmfb_work arg; |
448 | |
449 | INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); |
450 | INIT_LIST_HEAD(list: &arg.fbs); |
451 | list_add_tail(new: &fb->filp_head, head: &arg.fbs); |
452 | |
453 | schedule_work(work: &arg.work); |
454 | flush_work(work: &arg.work); |
455 | destroy_work_on_stack(work: &arg.work); |
456 | } else |
457 | drm_framebuffer_put(fb); |
458 | |
459 | return 0; |
460 | |
461 | fail_unref: |
462 | drm_framebuffer_put(fb); |
463 | return -ENOENT; |
464 | } |
465 | |
466 | int drm_mode_rmfb_ioctl(struct drm_device *dev, |
467 | void *data, struct drm_file *file_priv) |
468 | { |
469 | uint32_t *fb_id = data; |
470 | |
471 | return drm_mode_rmfb(dev, fb_id: *fb_id, file_priv); |
472 | } |
473 | |
474 | /** |
475 | * drm_mode_getfb - get FB info |
476 | * @dev: drm device for the ioctl |
477 | * @data: data pointer for the ioctl |
478 | * @file_priv: drm file for the ioctl call |
479 | * |
480 | * Lookup the FB given its ID and return info about it. |
481 | * |
482 | * Called by the user via ioctl. |
483 | * |
484 | * Returns: |
485 | * Zero on success, negative errno on failure. |
486 | */ |
487 | int drm_mode_getfb(struct drm_device *dev, |
488 | void *data, struct drm_file *file_priv) |
489 | { |
490 | struct drm_mode_fb_cmd *r = data; |
491 | struct drm_framebuffer *fb; |
492 | int ret; |
493 | |
494 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) |
495 | return -EOPNOTSUPP; |
496 | |
497 | fb = drm_framebuffer_lookup(dev, file_priv, id: r->fb_id); |
498 | if (!fb) |
499 | return -ENOENT; |
500 | |
501 | /* Multi-planar framebuffers need getfb2. */ |
502 | if (fb->format->num_planes > 1) { |
503 | ret = -EINVAL; |
504 | goto out; |
505 | } |
506 | |
507 | if (!fb->funcs->create_handle) { |
508 | ret = -ENODEV; |
509 | goto out; |
510 | } |
511 | |
512 | r->height = fb->height; |
513 | r->width = fb->width; |
514 | r->depth = fb->format->depth; |
515 | r->bpp = drm_format_info_bpp(info: fb->format, plane: 0); |
516 | r->pitch = fb->pitches[0]; |
517 | |
518 | /* GET_FB() is an unprivileged ioctl so we must not return a |
519 | * buffer-handle to non-master processes! For |
520 | * backwards-compatibility reasons, we cannot make GET_FB() privileged, |
521 | * so just return an invalid handle for non-masters. |
522 | */ |
523 | if (!drm_is_current_master(fpriv: file_priv) && !capable(CAP_SYS_ADMIN)) { |
524 | r->handle = 0; |
525 | ret = 0; |
526 | goto out; |
527 | } |
528 | |
529 | ret = fb->funcs->create_handle(fb, file_priv, &r->handle); |
530 | |
531 | out: |
532 | drm_framebuffer_put(fb); |
533 | return ret; |
534 | } |
535 | |
536 | /** |
537 | * drm_mode_getfb2_ioctl - get extended FB info |
538 | * @dev: drm device for the ioctl |
539 | * @data: data pointer for the ioctl |
540 | * @file_priv: drm file for the ioctl call |
541 | * |
542 | * Lookup the FB given its ID and return info about it. |
543 | * |
544 | * Called by the user via ioctl. |
545 | * |
546 | * Returns: |
547 | * Zero on success, negative errno on failure. |
548 | */ |
549 | int drm_mode_getfb2_ioctl(struct drm_device *dev, |
550 | void *data, struct drm_file *file_priv) |
551 | { |
552 | struct drm_mode_fb_cmd2 *r = data; |
553 | struct drm_framebuffer *fb; |
554 | unsigned int i; |
555 | int ret; |
556 | |
557 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) |
558 | return -EINVAL; |
559 | |
560 | fb = drm_framebuffer_lookup(dev, file_priv, id: r->fb_id); |
561 | if (!fb) |
562 | return -ENOENT; |
563 | |
564 | /* For multi-plane framebuffers, we require the driver to place the |
565 | * GEM objects directly in the drm_framebuffer. For single-plane |
566 | * framebuffers, we can fall back to create_handle. |
567 | */ |
568 | if (!fb->obj[0] && |
569 | (fb->format->num_planes > 1 || !fb->funcs->create_handle)) { |
570 | ret = -ENODEV; |
571 | goto out; |
572 | } |
573 | |
574 | r->height = fb->height; |
575 | r->width = fb->width; |
576 | r->pixel_format = fb->format->format; |
577 | |
578 | r->flags = 0; |
579 | if (!dev->mode_config.fb_modifiers_not_supported) |
580 | r->flags |= DRM_MODE_FB_MODIFIERS; |
581 | |
582 | for (i = 0; i < ARRAY_SIZE(r->handles); i++) { |
583 | r->handles[i] = 0; |
584 | r->pitches[i] = 0; |
585 | r->offsets[i] = 0; |
586 | r->modifier[i] = 0; |
587 | } |
588 | |
589 | for (i = 0; i < fb->format->num_planes; i++) { |
590 | r->pitches[i] = fb->pitches[i]; |
591 | r->offsets[i] = fb->offsets[i]; |
592 | if (!dev->mode_config.fb_modifiers_not_supported) |
593 | r->modifier[i] = fb->modifier; |
594 | } |
595 | |
596 | /* GET_FB2() is an unprivileged ioctl so we must not return a |
597 | * buffer-handle to non master/root processes! To match GET_FB() |
598 | * just return invalid handles (0) for non masters/root |
599 | * rather than making GET_FB2() privileged. |
600 | */ |
601 | if (!drm_is_current_master(fpriv: file_priv) && !capable(CAP_SYS_ADMIN)) { |
602 | ret = 0; |
603 | goto out; |
604 | } |
605 | |
606 | for (i = 0; i < fb->format->num_planes; i++) { |
607 | int j; |
608 | |
609 | /* If we reuse the same object for multiple planes, also |
610 | * return the same handle. |
611 | */ |
612 | for (j = 0; j < i; j++) { |
613 | if (fb->obj[i] == fb->obj[j]) { |
614 | r->handles[i] = r->handles[j]; |
615 | break; |
616 | } |
617 | } |
618 | |
619 | if (r->handles[i]) |
620 | continue; |
621 | |
622 | if (fb->obj[i]) { |
623 | ret = drm_gem_handle_create(file_priv, obj: fb->obj[i], |
624 | handlep: &r->handles[i]); |
625 | } else { |
626 | WARN_ON(i > 0); |
627 | ret = fb->funcs->create_handle(fb, file_priv, |
628 | &r->handles[i]); |
629 | } |
630 | |
631 | if (ret != 0) |
632 | goto out; |
633 | } |
634 | |
635 | out: |
636 | if (ret != 0) { |
637 | /* Delete any previously-created handles on failure. */ |
638 | for (i = 0; i < ARRAY_SIZE(r->handles); i++) { |
639 | int j; |
640 | |
641 | if (r->handles[i]) |
642 | drm_gem_handle_delete(filp: file_priv, handle: r->handles[i]); |
643 | |
644 | /* Zero out any handles identical to the one we just |
645 | * deleted. |
646 | */ |
647 | for (j = i + 1; j < ARRAY_SIZE(r->handles); j++) { |
648 | if (r->handles[j] == r->handles[i]) |
649 | r->handles[j] = 0; |
650 | } |
651 | } |
652 | } |
653 | |
654 | drm_framebuffer_put(fb); |
655 | return ret; |
656 | } |
657 | |
658 | /** |
659 | * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB |
660 | * @dev: drm device for the ioctl |
661 | * @data: data pointer for the ioctl |
662 | * @file_priv: drm file for the ioctl call |
663 | * |
664 | * Lookup the FB and flush out the damaged area supplied by userspace as a clip |
665 | * rectangle list. Generic userspace which does frontbuffer rendering must call |
666 | * this ioctl to flush out the changes on manual-update display outputs, e.g. |
667 | * usb display-link, mipi manual update panels or edp panel self refresh modes. |
668 | * |
669 | * Modesetting drivers which always update the frontbuffer do not need to |
670 | * implement the corresponding &drm_framebuffer_funcs.dirty callback. |
671 | * |
672 | * Called by the user via ioctl. |
673 | * |
674 | * Returns: |
675 | * Zero on success, negative errno on failure. |
676 | */ |
677 | int drm_mode_dirtyfb_ioctl(struct drm_device *dev, |
678 | void *data, struct drm_file *file_priv) |
679 | { |
680 | struct drm_clip_rect __user *clips_ptr; |
681 | struct drm_clip_rect *clips = NULL; |
682 | struct drm_mode_fb_dirty_cmd *r = data; |
683 | struct drm_framebuffer *fb; |
684 | unsigned flags; |
685 | int num_clips; |
686 | int ret; |
687 | |
688 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) |
689 | return -EOPNOTSUPP; |
690 | |
691 | fb = drm_framebuffer_lookup(dev, file_priv, id: r->fb_id); |
692 | if (!fb) |
693 | return -ENOENT; |
694 | |
695 | num_clips = r->num_clips; |
696 | clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; |
697 | |
698 | if (!num_clips != !clips_ptr) { |
699 | ret = -EINVAL; |
700 | goto out_err1; |
701 | } |
702 | |
703 | flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; |
704 | |
705 | /* If userspace annotates copy, clips must come in pairs */ |
706 | if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { |
707 | ret = -EINVAL; |
708 | goto out_err1; |
709 | } |
710 | |
711 | if (num_clips && clips_ptr) { |
712 | if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { |
713 | ret = -EINVAL; |
714 | goto out_err1; |
715 | } |
716 | clips = kcalloc(n: num_clips, size: sizeof(*clips), GFP_KERNEL); |
717 | if (!clips) { |
718 | ret = -ENOMEM; |
719 | goto out_err1; |
720 | } |
721 | |
722 | ret = copy_from_user(to: clips, from: clips_ptr, |
723 | n: num_clips * sizeof(*clips)); |
724 | if (ret) { |
725 | ret = -EFAULT; |
726 | goto out_err2; |
727 | } |
728 | } |
729 | |
730 | if (fb->funcs->dirty) { |
731 | ret = fb->funcs->dirty(fb, file_priv, flags, r->color, |
732 | clips, num_clips); |
733 | } else { |
734 | ret = -ENOSYS; |
735 | } |
736 | |
737 | out_err2: |
738 | kfree(objp: clips); |
739 | out_err1: |
740 | drm_framebuffer_put(fb); |
741 | |
742 | return ret; |
743 | } |
744 | |
745 | /** |
746 | * drm_fb_release - remove and free the FBs on this file |
747 | * @priv: drm file for the ioctl |
748 | * |
749 | * Destroy all the FBs associated with @filp. |
750 | * |
751 | * Called by the user via ioctl. |
752 | * |
753 | * Returns: |
754 | * Zero on success, negative errno on failure. |
755 | */ |
756 | void drm_fb_release(struct drm_file *priv) |
757 | { |
758 | struct drm_framebuffer *fb, *tfb; |
759 | struct drm_mode_rmfb_work arg; |
760 | |
761 | INIT_LIST_HEAD(list: &arg.fbs); |
762 | |
763 | /* |
764 | * When the file gets released that means no one else can access the fb |
765 | * list any more, so no need to grab fpriv->fbs_lock. And we need to |
766 | * avoid upsetting lockdep since the universal cursor code adds a |
767 | * framebuffer while holding mutex locks. |
768 | * |
769 | * Note that a real deadlock between fpriv->fbs_lock and the modeset |
770 | * locks is impossible here since no one else but this function can get |
771 | * at it any more. |
772 | */ |
773 | list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { |
774 | if (drm_framebuffer_read_refcount(fb) > 1) { |
775 | list_move_tail(list: &fb->filp_head, head: &arg.fbs); |
776 | } else { |
777 | list_del_init(entry: &fb->filp_head); |
778 | |
779 | /* This drops the fpriv->fbs reference. */ |
780 | drm_framebuffer_put(fb); |
781 | } |
782 | } |
783 | |
784 | if (!list_empty(head: &arg.fbs)) { |
785 | INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); |
786 | |
787 | schedule_work(work: &arg.work); |
788 | flush_work(work: &arg.work); |
789 | destroy_work_on_stack(work: &arg.work); |
790 | } |
791 | } |
792 | |
793 | void drm_framebuffer_free(struct kref *kref) |
794 | { |
795 | struct drm_framebuffer *fb = |
796 | container_of(kref, struct drm_framebuffer, base.refcount); |
797 | struct drm_device *dev = fb->dev; |
798 | |
799 | /* |
800 | * The lookup idr holds a weak reference, which has not necessarily been |
801 | * removed at this point. Check for that. |
802 | */ |
803 | drm_mode_object_unregister(dev, object: &fb->base); |
804 | |
805 | fb->funcs->destroy(fb); |
806 | } |
807 | |
808 | /** |
809 | * drm_framebuffer_init - initialize a framebuffer |
810 | * @dev: DRM device |
811 | * @fb: framebuffer to be initialized |
812 | * @funcs: ... with these functions |
813 | * |
814 | * Allocates an ID for the framebuffer's parent mode object, sets its mode |
815 | * functions & device file and adds it to the master fd list. |
816 | * |
817 | * IMPORTANT: |
818 | * This functions publishes the fb and makes it available for concurrent access |
819 | * by other users. Which means by this point the fb _must_ be fully set up - |
820 | * since all the fb attributes are invariant over its lifetime, no further |
821 | * locking but only correct reference counting is required. |
822 | * |
823 | * Returns: |
824 | * Zero on success, error code on failure. |
825 | */ |
826 | int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, |
827 | const struct drm_framebuffer_funcs *funcs) |
828 | { |
829 | int ret; |
830 | |
831 | if (WARN_ON_ONCE(fb->dev != dev || !fb->format)) |
832 | return -EINVAL; |
833 | |
834 | INIT_LIST_HEAD(list: &fb->filp_head); |
835 | |
836 | fb->funcs = funcs; |
837 | strcpy(p: fb->comm, current->comm); |
838 | |
839 | ret = __drm_mode_object_add(dev, obj: &fb->base, DRM_MODE_OBJECT_FB, |
840 | register_obj: false, obj_free_cb: drm_framebuffer_free); |
841 | if (ret) |
842 | goto out; |
843 | |
844 | mutex_lock(&dev->mode_config.fb_lock); |
845 | dev->mode_config.num_fb++; |
846 | list_add(new: &fb->head, head: &dev->mode_config.fb_list); |
847 | mutex_unlock(lock: &dev->mode_config.fb_lock); |
848 | |
849 | drm_mode_object_register(dev, obj: &fb->base); |
850 | out: |
851 | return ret; |
852 | } |
853 | EXPORT_SYMBOL(drm_framebuffer_init); |
854 | |
855 | /** |
856 | * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference |
857 | * @dev: drm device |
858 | * @file_priv: drm file to check for lease against. |
859 | * @id: id of the fb object |
860 | * |
861 | * If successful, this grabs an additional reference to the framebuffer - |
862 | * callers need to make sure to eventually unreference the returned framebuffer |
863 | * again, using drm_framebuffer_put(). |
864 | */ |
865 | struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, |
866 | struct drm_file *file_priv, |
867 | uint32_t id) |
868 | { |
869 | struct drm_mode_object *obj; |
870 | struct drm_framebuffer *fb = NULL; |
871 | |
872 | obj = __drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_FB); |
873 | if (obj) |
874 | fb = obj_to_fb(obj); |
875 | return fb; |
876 | } |
877 | EXPORT_SYMBOL(drm_framebuffer_lookup); |
878 | |
879 | /** |
880 | * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr |
881 | * @fb: fb to unregister |
882 | * |
883 | * Drivers need to call this when cleaning up driver-private framebuffers, e.g. |
884 | * those used for fbdev. Note that the caller must hold a reference of its own, |
885 | * i.e. the object may not be destroyed through this call (since it'll lead to a |
886 | * locking inversion). |
887 | * |
888 | * NOTE: This function is deprecated. For driver-private framebuffers it is not |
889 | * recommended to embed a framebuffer struct info fbdev struct, instead, a |
890 | * framebuffer pointer is preferred and drm_framebuffer_put() should be called |
891 | * when the framebuffer is to be cleaned up. |
892 | */ |
893 | void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) |
894 | { |
895 | struct drm_device *dev; |
896 | |
897 | if (!fb) |
898 | return; |
899 | |
900 | dev = fb->dev; |
901 | |
902 | /* Mark fb as reaped and drop idr ref. */ |
903 | drm_mode_object_unregister(dev, object: &fb->base); |
904 | } |
905 | EXPORT_SYMBOL(drm_framebuffer_unregister_private); |
906 | |
907 | /** |
908 | * drm_framebuffer_cleanup - remove a framebuffer object |
909 | * @fb: framebuffer to remove |
910 | * |
911 | * Cleanup framebuffer. This function is intended to be used from the drivers |
912 | * &drm_framebuffer_funcs.destroy callback. It can also be used to clean up |
913 | * driver private framebuffers embedded into a larger structure. |
914 | * |
915 | * Note that this function does not remove the fb from active usage - if it is |
916 | * still used anywhere, hilarity can ensue since userspace could call getfb on |
917 | * the id and get back -EINVAL. Obviously no concern at driver unload time. |
918 | * |
919 | * Also, the framebuffer will not be removed from the lookup idr - for |
920 | * user-created framebuffers this will happen in the rmfb ioctl. For |
921 | * driver-private objects (e.g. for fbdev) drivers need to explicitly call |
922 | * drm_framebuffer_unregister_private. |
923 | */ |
924 | void drm_framebuffer_cleanup(struct drm_framebuffer *fb) |
925 | { |
926 | struct drm_device *dev = fb->dev; |
927 | |
928 | mutex_lock(&dev->mode_config.fb_lock); |
929 | list_del(entry: &fb->head); |
930 | dev->mode_config.num_fb--; |
931 | mutex_unlock(lock: &dev->mode_config.fb_lock); |
932 | } |
933 | EXPORT_SYMBOL(drm_framebuffer_cleanup); |
934 | |
935 | static int atomic_remove_fb(struct drm_framebuffer *fb) |
936 | { |
937 | struct drm_modeset_acquire_ctx ctx; |
938 | struct drm_device *dev = fb->dev; |
939 | struct drm_atomic_state *state; |
940 | struct drm_plane *plane; |
941 | struct drm_connector *conn __maybe_unused; |
942 | struct drm_connector_state *conn_state; |
943 | int i, ret; |
944 | unsigned plane_mask; |
945 | bool disable_crtcs = false; |
946 | |
947 | retry_disable: |
948 | drm_modeset_acquire_init(ctx: &ctx, flags: 0); |
949 | |
950 | state = drm_atomic_state_alloc(dev); |
951 | if (!state) { |
952 | ret = -ENOMEM; |
953 | goto out; |
954 | } |
955 | state->acquire_ctx = &ctx; |
956 | |
957 | retry: |
958 | plane_mask = 0; |
959 | ret = drm_modeset_lock_all_ctx(dev, ctx: &ctx); |
960 | if (ret) |
961 | goto unlock; |
962 | |
963 | drm_for_each_plane(plane, dev) { |
964 | struct drm_plane_state *plane_state; |
965 | |
966 | if (plane->state->fb != fb) |
967 | continue; |
968 | |
969 | drm_dbg_kms(dev, |
970 | "Disabling [PLANE:%d:%s] because [FB:%d] is removed\n" , |
971 | plane->base.id, plane->name, fb->base.id); |
972 | |
973 | plane_state = drm_atomic_get_plane_state(state, plane); |
974 | if (IS_ERR(ptr: plane_state)) { |
975 | ret = PTR_ERR(ptr: plane_state); |
976 | goto unlock; |
977 | } |
978 | |
979 | if (disable_crtcs && plane_state->crtc->primary == plane) { |
980 | struct drm_crtc_state *crtc_state; |
981 | |
982 | drm_dbg_kms(dev, |
983 | "Disabling [CRTC:%d:%s] because [FB:%d] is removed\n" , |
984 | plane_state->crtc->base.id, |
985 | plane_state->crtc->name, fb->base.id); |
986 | |
987 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc: plane_state->crtc); |
988 | |
989 | ret = drm_atomic_add_affected_connectors(state, crtc: plane_state->crtc); |
990 | if (ret) |
991 | goto unlock; |
992 | |
993 | crtc_state->active = false; |
994 | ret = drm_atomic_set_mode_for_crtc(state: crtc_state, NULL); |
995 | if (ret) |
996 | goto unlock; |
997 | } |
998 | |
999 | drm_atomic_set_fb_for_plane(plane_state, NULL); |
1000 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
1001 | if (ret) |
1002 | goto unlock; |
1003 | |
1004 | plane_mask |= drm_plane_mask(plane); |
1005 | } |
1006 | |
1007 | /* This list is only filled when disable_crtcs is set. */ |
1008 | for_each_new_connector_in_state(state, conn, conn_state, i) { |
1009 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); |
1010 | |
1011 | if (ret) |
1012 | goto unlock; |
1013 | } |
1014 | |
1015 | if (plane_mask) |
1016 | ret = drm_atomic_commit(state); |
1017 | |
1018 | unlock: |
1019 | if (ret == -EDEADLK) { |
1020 | drm_atomic_state_clear(state); |
1021 | drm_modeset_backoff(ctx: &ctx); |
1022 | goto retry; |
1023 | } |
1024 | |
1025 | drm_atomic_state_put(state); |
1026 | |
1027 | out: |
1028 | drm_modeset_drop_locks(ctx: &ctx); |
1029 | drm_modeset_acquire_fini(ctx: &ctx); |
1030 | |
1031 | if (ret == -EINVAL && !disable_crtcs) { |
1032 | disable_crtcs = true; |
1033 | goto retry_disable; |
1034 | } |
1035 | |
1036 | return ret; |
1037 | } |
1038 | |
1039 | static void legacy_remove_fb(struct drm_framebuffer *fb) |
1040 | { |
1041 | struct drm_device *dev = fb->dev; |
1042 | struct drm_crtc *crtc; |
1043 | struct drm_plane *plane; |
1044 | |
1045 | drm_modeset_lock_all(dev); |
1046 | /* remove from any CRTC */ |
1047 | drm_for_each_crtc(crtc, dev) { |
1048 | if (crtc->primary->fb == fb) { |
1049 | drm_dbg_kms(dev, |
1050 | "Disabling [CRTC:%d:%s] because [FB:%d] is removed\n" , |
1051 | crtc->base.id, crtc->name, fb->base.id); |
1052 | |
1053 | /* should turn off the crtc */ |
1054 | if (drm_crtc_force_disable(crtc)) |
1055 | DRM_ERROR("failed to reset crtc %p when fb was deleted\n" , crtc); |
1056 | } |
1057 | } |
1058 | |
1059 | drm_for_each_plane(plane, dev) { |
1060 | if (plane->fb == fb) { |
1061 | drm_dbg_kms(dev, |
1062 | "Disabling [PLANE:%d:%s] because [FB:%d] is removed\n" , |
1063 | plane->base.id, plane->name, fb->base.id); |
1064 | drm_plane_force_disable(plane); |
1065 | } |
1066 | } |
1067 | drm_modeset_unlock_all(dev); |
1068 | } |
1069 | |
1070 | /** |
1071 | * drm_framebuffer_remove - remove and unreference a framebuffer object |
1072 | * @fb: framebuffer to remove |
1073 | * |
1074 | * Scans all the CRTCs and planes in @dev's mode_config. If they're |
1075 | * using @fb, removes it, setting it to NULL. Then drops the reference to the |
1076 | * passed-in framebuffer. Might take the modeset locks. |
1077 | * |
1078 | * Note that this function optimizes the cleanup away if the caller holds the |
1079 | * last reference to the framebuffer. It is also guaranteed to not take the |
1080 | * modeset locks in this case. |
1081 | */ |
1082 | void drm_framebuffer_remove(struct drm_framebuffer *fb) |
1083 | { |
1084 | struct drm_device *dev; |
1085 | |
1086 | if (!fb) |
1087 | return; |
1088 | |
1089 | dev = fb->dev; |
1090 | |
1091 | WARN_ON(!list_empty(&fb->filp_head)); |
1092 | |
1093 | /* |
1094 | * drm ABI mandates that we remove any deleted framebuffers from active |
1095 | * usage. But since most sane clients only remove framebuffers they no |
1096 | * longer need, try to optimize this away. |
1097 | * |
1098 | * Since we're holding a reference ourselves, observing a refcount of 1 |
1099 | * means that we're the last holder and can skip it. Also, the refcount |
1100 | * can never increase from 1 again, so we don't need any barriers or |
1101 | * locks. |
1102 | * |
1103 | * Note that userspace could try to race with use and instate a new |
1104 | * usage _after_ we've cleared all current ones. End result will be an |
1105 | * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot |
1106 | * in this manner. |
1107 | */ |
1108 | if (drm_framebuffer_read_refcount(fb) > 1) { |
1109 | if (drm_drv_uses_atomic_modeset(dev)) { |
1110 | int ret = atomic_remove_fb(fb); |
1111 | |
1112 | WARN(ret, "atomic remove_fb failed with %i\n" , ret); |
1113 | } else |
1114 | legacy_remove_fb(fb); |
1115 | } |
1116 | |
1117 | drm_framebuffer_put(fb); |
1118 | } |
1119 | EXPORT_SYMBOL(drm_framebuffer_remove); |
1120 | |
1121 | void drm_framebuffer_print_info(struct drm_printer *p, unsigned int indent, |
1122 | const struct drm_framebuffer *fb) |
1123 | { |
1124 | unsigned int i; |
1125 | |
1126 | drm_printf_indent(p, indent, "allocated by = %s\n" , fb->comm); |
1127 | drm_printf_indent(p, indent, "refcount=%u\n" , |
1128 | drm_framebuffer_read_refcount(fb)); |
1129 | drm_printf_indent(p, indent, "format=%p4cc\n" , &fb->format->format); |
1130 | drm_printf_indent(p, indent, "modifier=0x%llx\n" , fb->modifier); |
1131 | drm_printf_indent(p, indent, "size=%ux%u\n" , fb->width, fb->height); |
1132 | drm_printf_indent(p, indent, "layers:\n" ); |
1133 | |
1134 | for (i = 0; i < fb->format->num_planes; i++) { |
1135 | drm_printf_indent(p, indent + 1, "size[%u]=%dx%d\n" , i, |
1136 | drm_format_info_plane_width(fb->format, fb->width, i), |
1137 | drm_format_info_plane_height(fb->format, fb->height, i)); |
1138 | drm_printf_indent(p, indent + 1, "pitch[%u]=%u\n" , i, fb->pitches[i]); |
1139 | drm_printf_indent(p, indent + 1, "offset[%u]=%u\n" , i, fb->offsets[i]); |
1140 | drm_printf_indent(p, indent + 1, "obj[%u]:%s\n" , i, |
1141 | fb->obj[i] ? "" : "(null)" ); |
1142 | if (fb->obj[i]) |
1143 | drm_gem_print_info(p, indent: indent + 2, obj: fb->obj[i]); |
1144 | } |
1145 | } |
1146 | |
1147 | #ifdef CONFIG_DEBUG_FS |
1148 | static int drm_framebuffer_info(struct seq_file *m, void *data) |
1149 | { |
1150 | struct drm_debugfs_entry *entry = m->private; |
1151 | struct drm_device *dev = entry->dev; |
1152 | struct drm_printer p = drm_seq_file_printer(f: m); |
1153 | struct drm_framebuffer *fb; |
1154 | |
1155 | mutex_lock(&dev->mode_config.fb_lock); |
1156 | drm_for_each_fb(fb, dev) { |
1157 | drm_printf(p: &p, f: "framebuffer[%u]:\n" , fb->base.id); |
1158 | drm_framebuffer_print_info(p: &p, indent: 1, fb); |
1159 | } |
1160 | mutex_unlock(lock: &dev->mode_config.fb_lock); |
1161 | |
1162 | return 0; |
1163 | } |
1164 | |
1165 | static const struct drm_debugfs_info drm_framebuffer_debugfs_list[] = { |
1166 | { "framebuffer" , drm_framebuffer_info, 0 }, |
1167 | }; |
1168 | |
1169 | void drm_framebuffer_debugfs_init(struct drm_device *dev) |
1170 | { |
1171 | drm_debugfs_add_files(dev, files: drm_framebuffer_debugfs_list, |
1172 | ARRAY_SIZE(drm_framebuffer_debugfs_list)); |
1173 | } |
1174 | #endif |
1175 | |