Commit | Line | Data |
---|---|---|
7520a277 DV |
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> | |
0500c04e SR |
24 | #include <linux/uaccess.h> |
25 | ||
941b8caa | 26 | #include <drm/drm_atomic.h> |
72fdb40c | 27 | #include <drm/drm_atomic_uapi.h> |
0500c04e SR |
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> | |
455e00f1 | 34 | #include <drm/drm_gem.h> |
45d58b40 | 35 | #include <drm/drm_print.h> |
21376e2c | 36 | #include <drm/drm_util.h> |
7520a277 DV |
37 | |
38 | #include "drm_crtc_internal.h" | |
0500c04e | 39 | #include "drm_internal.h" |
7520a277 | 40 | |
750fb8c4 DV |
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 | |
ea0dd85a | 53 | * &struct drm_mode_fb_cmd2 argument. For drivers using GEM as their userspace |
750fb8c4 DV |
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 | * | |
ea0dd85a | 59 | * Framebuffers are tracked with &struct drm_framebuffer. They are published |
750fb8c4 DV |
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, | |
a4a69da0 TR |
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 | |
d574528a | 73 | * drm_framebuffer. |
750fb8c4 DV |
74 | */ |
75 | ||
43968d7b DV |
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_DEBUG_KMS("Invalid source coordinates " | |
0338f0d0 | 91 | "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n", |
43968d7b DV |
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, | |
0338f0d0 VS |
95 | src_y >> 16, ((src_y & 0xffff) * 15625) >> 10, |
96 | fb->width, fb->height); | |
43968d7b DV |
97 | return -ENOSPC; |
98 | } | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
7520a277 DV |
103 | /** |
104 | * drm_mode_addfb - add an FB to the graphics configuration | |
105 | * @dev: drm device for the ioctl | |
d30827ce NT |
106 | * @or: pointer to request structure |
107 | * @file_priv: drm file | |
7520a277 DV |
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 | * | |
d30827ce | 112 | * Called by the user via ioctl, or by an in-kernel client. |
7520a277 DV |
113 | * |
114 | * Returns: | |
115 | * Zero on success, negative errno on failure. | |
116 | */ | |
d30827ce NT |
117 | int drm_mode_addfb(struct drm_device *dev, struct drm_mode_fb_cmd *or, |
118 | struct drm_file *file_priv) | |
7520a277 | 119 | { |
7520a277 DV |
120 | struct drm_mode_fb_cmd2 r = {}; |
121 | int ret; | |
122 | ||
69fdf420 CW |
123 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
124 | return -EOPNOTSUPP; | |
125 | ||
059b5eb5 | 126 | r.pixel_format = drm_driver_legacy_fb_format(dev, or->bpp, or->depth); |
70109354 CW |
127 | if (r.pixel_format == DRM_FORMAT_INVALID) { |
128 | DRM_DEBUG("bad {bpp:%d, depth:%d}\n", or->bpp, or->depth); | |
129 | return -EINVAL; | |
130 | } | |
131 | ||
7520a277 DV |
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; | |
7520a277 DV |
137 | r.handles[0] = or->handle; |
138 | ||
139 | ret = drm_mode_addfb2(dev, &r, file_priv); | |
140 | if (ret) | |
141 | return ret; | |
142 | ||
143 | or->fb_id = r.fb_id; | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
d30827ce NT |
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, data, file_priv); | |
152 | } | |
153 | ||
568c5e45 VS |
154 | static int fb_plane_width(int width, |
155 | const struct drm_format_info *format, int plane) | |
156 | { | |
157 | if (plane == 0) | |
158 | return width; | |
159 | ||
33f673aa | 160 | return DIV_ROUND_UP(width, format->hsub); |
568c5e45 VS |
161 | } |
162 | ||
163 | static int fb_plane_height(int height, | |
164 | const struct drm_format_info *format, int plane) | |
165 | { | |
166 | if (plane == 0) | |
167 | return height; | |
168 | ||
33f673aa | 169 | return DIV_ROUND_UP(height, format->vsub); |
568c5e45 VS |
170 | } |
171 | ||
6a0f9ebf VS |
172 | static int framebuffer_check(struct drm_device *dev, |
173 | const struct drm_mode_fb_cmd2 *r) | |
7520a277 | 174 | { |
d5493490 LP |
175 | const struct drm_format_info *info; |
176 | int i; | |
7520a277 | 177 | |
6a0f9ebf | 178 | /* check if the format is supported at all */ |
bbd9caa0 | 179 | if (!__drm_format_info(r->pixel_format)) { |
92f1d09c SA |
180 | DRM_DEBUG_KMS("bad framebuffer format %p4cc\n", |
181 | &r->pixel_format); | |
d5493490 | 182 | return -EINVAL; |
7520a277 DV |
183 | } |
184 | ||
33f673aa | 185 | if (r->width == 0) { |
7520a277 DV |
186 | DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); |
187 | return -EINVAL; | |
188 | } | |
189 | ||
33f673aa | 190 | if (r->height == 0) { |
7520a277 DV |
191 | DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); |
192 | return -EINVAL; | |
193 | } | |
194 | ||
bbd9caa0 BZ |
195 | /* now let the driver pick its own format info */ |
196 | info = drm_get_format_info(dev, r); | |
197 | ||
d5493490 | 198 | for (i = 0; i < info->num_planes; i++) { |
568c5e45 VS |
199 | unsigned int width = fb_plane_width(r->width, info, i); |
200 | unsigned int height = fb_plane_height(r->height, info, i); | |
8db2dc85 | 201 | unsigned int block_size = info->char_per_block[i]; |
042bf753 | 202 | u64 min_pitch = drm_format_info_min_pitch(info, i, width); |
7520a277 | 203 | |
8db2dc85 AG |
204 | if (!block_size && (r->modifier[i] == DRM_FORMAT_MOD_LINEAR)) { |
205 | DRM_DEBUG_KMS("Format requires non-linear modifier for plane %d\n", i); | |
206 | return -EINVAL; | |
207 | } | |
208 | ||
7520a277 DV |
209 | if (!r->handles[i]) { |
210 | DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); | |
211 | return -EINVAL; | |
212 | } | |
213 | ||
042bf753 | 214 | if (min_pitch > UINT_MAX) |
7520a277 DV |
215 | return -ERANGE; |
216 | ||
217 | if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) | |
218 | return -ERANGE; | |
219 | ||
8db2dc85 | 220 | if (block_size && r->pitches[i] < min_pitch) { |
7520a277 DV |
221 | DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); |
222 | return -EINVAL; | |
223 | } | |
224 | ||
225 | if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { | |
226 | DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", | |
227 | r->modifier[i], i); | |
228 | return -EINVAL; | |
229 | } | |
230 | ||
bae781b2 VS |
231 | if (r->flags & DRM_MODE_FB_MODIFIERS && |
232 | r->modifier[i] != r->modifier[0]) { | |
233 | DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", | |
234 | r->modifier[i], i); | |
235 | return -EINVAL; | |
236 | } | |
237 | ||
7520a277 DV |
238 | /* modifier specific checks: */ |
239 | switch (r->modifier[i]) { | |
240 | case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: | |
241 | /* NOTE: the pitch restriction may be lifted later if it turns | |
242 | * out that no hw has this restriction: | |
243 | */ | |
244 | if (r->pixel_format != DRM_FORMAT_NV12 || | |
245 | width % 128 || height % 32 || | |
246 | r->pitches[i] % 128) { | |
247 | DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); | |
248 | return -EINVAL; | |
249 | } | |
250 | break; | |
251 | ||
252 | default: | |
253 | break; | |
254 | } | |
255 | } | |
256 | ||
d5493490 | 257 | for (i = info->num_planes; i < 4; i++) { |
7520a277 DV |
258 | if (r->modifier[i]) { |
259 | DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); | |
260 | return -EINVAL; | |
261 | } | |
262 | ||
263 | /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ | |
264 | if (!(r->flags & DRM_MODE_FB_MODIFIERS)) | |
265 | continue; | |
266 | ||
267 | if (r->handles[i]) { | |
268 | DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); | |
269 | return -EINVAL; | |
270 | } | |
271 | ||
272 | if (r->pitches[i]) { | |
273 | DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); | |
274 | return -EINVAL; | |
275 | } | |
276 | ||
277 | if (r->offsets[i]) { | |
278 | DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); | |
279 | return -EINVAL; | |
280 | } | |
281 | } | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
286 | struct drm_framebuffer * | |
287 | drm_internal_framebuffer_create(struct drm_device *dev, | |
288 | const struct drm_mode_fb_cmd2 *r, | |
289 | struct drm_file *file_priv) | |
290 | { | |
291 | struct drm_mode_config *config = &dev->mode_config; | |
292 | struct drm_framebuffer *fb; | |
293 | int ret; | |
294 | ||
295 | if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { | |
296 | DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); | |
297 | return ERR_PTR(-EINVAL); | |
298 | } | |
299 | ||
300 | if ((config->min_width > r->width) || (r->width > config->max_width)) { | |
301 | DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", | |
302 | r->width, config->min_width, config->max_width); | |
303 | return ERR_PTR(-EINVAL); | |
304 | } | |
305 | if ((config->min_height > r->height) || (r->height > config->max_height)) { | |
306 | DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", | |
307 | r->height, config->min_height, config->max_height); | |
308 | return ERR_PTR(-EINVAL); | |
309 | } | |
310 | ||
311 | if (r->flags & DRM_MODE_FB_MODIFIERS && | |
312 | !dev->mode_config.allow_fb_modifiers) { | |
313 | DRM_DEBUG_KMS("driver does not support fb modifiers\n"); | |
314 | return ERR_PTR(-EINVAL); | |
315 | } | |
316 | ||
6a0f9ebf | 317 | ret = framebuffer_check(dev, r); |
7520a277 DV |
318 | if (ret) |
319 | return ERR_PTR(ret); | |
320 | ||
321 | fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); | |
322 | if (IS_ERR(fb)) { | |
323 | DRM_DEBUG_KMS("could not create framebuffer\n"); | |
324 | return fb; | |
325 | } | |
326 | ||
327 | return fb; | |
328 | } | |
9aefed1f | 329 | EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_internal_framebuffer_create); |
7520a277 DV |
330 | |
331 | /** | |
332 | * drm_mode_addfb2 - add an FB to the graphics configuration | |
333 | * @dev: drm device for the ioctl | |
334 | * @data: data pointer for the ioctl | |
335 | * @file_priv: drm file for the ioctl call | |
336 | * | |
337 | * Add a new FB to the specified CRTC, given a user request with format. This is | |
338 | * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers | |
339 | * and uses fourcc codes as pixel format specifiers. | |
340 | * | |
341 | * Called by the user via ioctl. | |
342 | * | |
343 | * Returns: | |
344 | * Zero on success, negative errno on failure. | |
345 | */ | |
346 | int drm_mode_addfb2(struct drm_device *dev, | |
347 | void *data, struct drm_file *file_priv) | |
348 | { | |
349 | struct drm_mode_fb_cmd2 *r = data; | |
350 | struct drm_framebuffer *fb; | |
351 | ||
352 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 353 | return -EOPNOTSUPP; |
7520a277 DV |
354 | |
355 | fb = drm_internal_framebuffer_create(dev, r, file_priv); | |
356 | if (IS_ERR(fb)) | |
357 | return PTR_ERR(fb); | |
358 | ||
359 | DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); | |
360 | r->fb_id = fb->base.id; | |
361 | ||
362 | /* Transfer ownership to the filp for reaping on close */ | |
363 | mutex_lock(&file_priv->fbs_lock); | |
364 | list_add(&fb->filp_head, &file_priv->fbs); | |
365 | mutex_unlock(&file_priv->fbs_lock); | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
eae06120 GH |
370 | int drm_mode_addfb2_ioctl(struct drm_device *dev, |
371 | void *data, struct drm_file *file_priv) | |
372 | { | |
373 | #ifdef __BIG_ENDIAN | |
374 | if (!dev->mode_config.quirk_addfb_prefer_host_byte_order) { | |
375 | /* | |
376 | * Drivers must set the | |
377 | * quirk_addfb_prefer_host_byte_order quirk to make | |
378 | * the drm_mode_addfb() compat code work correctly on | |
379 | * bigendian machines. | |
380 | * | |
381 | * If they don't they interpret pixel_format values | |
382 | * incorrectly for bug compatibility, which in turn | |
383 | * implies the ADDFB2 ioctl does not work correctly | |
384 | * then. So block it to make userspace fallback to | |
385 | * ADDFB. | |
386 | */ | |
387 | DRM_DEBUG_KMS("addfb2 broken on bigendian"); | |
69fdf420 | 388 | return -EOPNOTSUPP; |
eae06120 GH |
389 | } |
390 | #endif | |
391 | return drm_mode_addfb2(dev, data, file_priv); | |
392 | } | |
393 | ||
7520a277 DV |
394 | struct drm_mode_rmfb_work { |
395 | struct work_struct work; | |
396 | struct list_head fbs; | |
397 | }; | |
398 | ||
399 | static void drm_mode_rmfb_work_fn(struct work_struct *w) | |
400 | { | |
401 | struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work); | |
402 | ||
403 | while (!list_empty(&arg->fbs)) { | |
404 | struct drm_framebuffer *fb = | |
405 | list_first_entry(&arg->fbs, typeof(*fb), filp_head); | |
406 | ||
407 | list_del_init(&fb->filp_head); | |
408 | drm_framebuffer_remove(fb); | |
409 | } | |
410 | } | |
411 | ||
412 | /** | |
413 | * drm_mode_rmfb - remove an FB from the configuration | |
d30827ce NT |
414 | * @dev: drm device |
415 | * @fb_id: id of framebuffer to remove | |
416 | * @file_priv: drm file | |
7520a277 | 417 | * |
d30827ce | 418 | * Remove the specified FB. |
7520a277 | 419 | * |
d30827ce | 420 | * Called by the user via ioctl, or by an in-kernel client. |
7520a277 DV |
421 | * |
422 | * Returns: | |
423 | * Zero on success, negative errno on failure. | |
424 | */ | |
d30827ce NT |
425 | int drm_mode_rmfb(struct drm_device *dev, u32 fb_id, |
426 | struct drm_file *file_priv) | |
7520a277 DV |
427 | { |
428 | struct drm_framebuffer *fb = NULL; | |
429 | struct drm_framebuffer *fbl = NULL; | |
7520a277 DV |
430 | int found = 0; |
431 | ||
432 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 433 | return -EOPNOTSUPP; |
7520a277 | 434 | |
d30827ce | 435 | fb = drm_framebuffer_lookup(dev, file_priv, fb_id); |
7520a277 DV |
436 | if (!fb) |
437 | return -ENOENT; | |
438 | ||
439 | mutex_lock(&file_priv->fbs_lock); | |
440 | list_for_each_entry(fbl, &file_priv->fbs, filp_head) | |
441 | if (fb == fbl) | |
442 | found = 1; | |
443 | if (!found) { | |
444 | mutex_unlock(&file_priv->fbs_lock); | |
445 | goto fail_unref; | |
446 | } | |
447 | ||
448 | list_del_init(&fb->filp_head); | |
449 | mutex_unlock(&file_priv->fbs_lock); | |
450 | ||
451 | /* drop the reference we picked up in framebuffer lookup */ | |
a4a69da0 | 452 | drm_framebuffer_put(fb); |
7520a277 DV |
453 | |
454 | /* | |
455 | * we now own the reference that was stored in the fbs list | |
456 | * | |
457 | * drm_framebuffer_remove may fail with -EINTR on pending signals, | |
458 | * so run this in a separate stack as there's no way to correctly | |
459 | * handle this after the fb is already removed from the lookup table. | |
460 | */ | |
461 | if (drm_framebuffer_read_refcount(fb) > 1) { | |
462 | struct drm_mode_rmfb_work arg; | |
463 | ||
464 | INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); | |
465 | INIT_LIST_HEAD(&arg.fbs); | |
466 | list_add_tail(&fb->filp_head, &arg.fbs); | |
467 | ||
468 | schedule_work(&arg.work); | |
469 | flush_work(&arg.work); | |
470 | destroy_work_on_stack(&arg.work); | |
471 | } else | |
a4a69da0 | 472 | drm_framebuffer_put(fb); |
7520a277 DV |
473 | |
474 | return 0; | |
475 | ||
476 | fail_unref: | |
a4a69da0 | 477 | drm_framebuffer_put(fb); |
7520a277 DV |
478 | return -ENOENT; |
479 | } | |
480 | ||
d30827ce NT |
481 | int drm_mode_rmfb_ioctl(struct drm_device *dev, |
482 | void *data, struct drm_file *file_priv) | |
483 | { | |
484 | uint32_t *fb_id = data; | |
485 | ||
486 | return drm_mode_rmfb(dev, *fb_id, file_priv); | |
487 | } | |
488 | ||
7520a277 DV |
489 | /** |
490 | * drm_mode_getfb - get FB info | |
491 | * @dev: drm device for the ioctl | |
492 | * @data: data pointer for the ioctl | |
493 | * @file_priv: drm file for the ioctl call | |
494 | * | |
495 | * Lookup the FB given its ID and return info about it. | |
496 | * | |
497 | * Called by the user via ioctl. | |
498 | * | |
499 | * Returns: | |
500 | * Zero on success, negative errno on failure. | |
501 | */ | |
502 | int drm_mode_getfb(struct drm_device *dev, | |
503 | void *data, struct drm_file *file_priv) | |
504 | { | |
505 | struct drm_mode_fb_cmd *r = data; | |
506 | struct drm_framebuffer *fb; | |
507 | int ret; | |
508 | ||
509 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 510 | return -EOPNOTSUPP; |
7520a277 | 511 | |
418da172 | 512 | fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id); |
7520a277 DV |
513 | if (!fb) |
514 | return -ENOENT; | |
515 | ||
b24791fe DS |
516 | /* Multi-planar framebuffers need getfb2. */ |
517 | if (fb->format->num_planes > 1) { | |
518 | ret = -EINVAL; | |
519 | goto out; | |
520 | } | |
521 | ||
487da617 DS |
522 | if (!fb->funcs->create_handle) { |
523 | ret = -ENODEV; | |
524 | goto out; | |
525 | } | |
526 | ||
7520a277 DV |
527 | r->height = fb->height; |
528 | r->width = fb->width; | |
b00c600e | 529 | r->depth = fb->format->depth; |
272725c7 | 530 | r->bpp = fb->format->cpp[0] * 8; |
7520a277 | 531 | r->pitch = fb->pitches[0]; |
487da617 DS |
532 | |
533 | /* GET_FB() is an unprivileged ioctl so we must not return a | |
534 | * buffer-handle to non-master processes! For | |
535 | * backwards-compatibility reasons, we cannot make GET_FB() privileged, | |
536 | * so just return an invalid handle for non-masters. | |
537 | */ | |
0d49f303 | 538 | if (!drm_is_current_master(file_priv) && !capable(CAP_SYS_ADMIN)) { |
487da617 DS |
539 | r->handle = 0; |
540 | ret = 0; | |
541 | goto out; | |
7520a277 DV |
542 | } |
543 | ||
487da617 DS |
544 | ret = fb->funcs->create_handle(fb, file_priv, &r->handle); |
545 | ||
b24791fe | 546 | out: |
a4a69da0 | 547 | drm_framebuffer_put(fb); |
455e00f1 DS |
548 | return ret; |
549 | } | |
550 | ||
551 | /** | |
e9d2871f | 552 | * drm_mode_getfb2_ioctl - get extended FB info |
455e00f1 DS |
553 | * @dev: drm device for the ioctl |
554 | * @data: data pointer for the ioctl | |
555 | * @file_priv: drm file for the ioctl call | |
556 | * | |
557 | * Lookup the FB given its ID and return info about it. | |
558 | * | |
559 | * Called by the user via ioctl. | |
560 | * | |
561 | * Returns: | |
562 | * Zero on success, negative errno on failure. | |
563 | */ | |
564 | int drm_mode_getfb2_ioctl(struct drm_device *dev, | |
565 | void *data, struct drm_file *file_priv) | |
566 | { | |
567 | struct drm_mode_fb_cmd2 *r = data; | |
568 | struct drm_framebuffer *fb; | |
569 | unsigned int i; | |
570 | int ret; | |
571 | ||
572 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
573 | return -EINVAL; | |
574 | ||
575 | fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id); | |
576 | if (!fb) | |
577 | return -ENOENT; | |
578 | ||
579 | /* For multi-plane framebuffers, we require the driver to place the | |
580 | * GEM objects directly in the drm_framebuffer. For single-plane | |
581 | * framebuffers, we can fall back to create_handle. | |
582 | */ | |
583 | if (!fb->obj[0] && | |
584 | (fb->format->num_planes > 1 || !fb->funcs->create_handle)) { | |
585 | ret = -ENODEV; | |
586 | goto out; | |
587 | } | |
588 | ||
589 | r->height = fb->height; | |
590 | r->width = fb->width; | |
591 | r->pixel_format = fb->format->format; | |
592 | ||
593 | r->flags = 0; | |
594 | if (dev->mode_config.allow_fb_modifiers) | |
595 | r->flags |= DRM_MODE_FB_MODIFIERS; | |
596 | ||
597 | for (i = 0; i < ARRAY_SIZE(r->handles); i++) { | |
598 | r->handles[i] = 0; | |
599 | r->pitches[i] = 0; | |
600 | r->offsets[i] = 0; | |
601 | r->modifier[i] = 0; | |
602 | } | |
7520a277 | 603 | |
455e00f1 DS |
604 | for (i = 0; i < fb->format->num_planes; i++) { |
605 | r->pitches[i] = fb->pitches[i]; | |
606 | r->offsets[i] = fb->offsets[i]; | |
607 | if (dev->mode_config.allow_fb_modifiers) | |
608 | r->modifier[i] = fb->modifier; | |
609 | } | |
610 | ||
611 | /* GET_FB2() is an unprivileged ioctl so we must not return a | |
612 | * buffer-handle to non master/root processes! To match GET_FB() | |
613 | * just return invalid handles (0) for non masters/root | |
614 | * rather than making GET_FB2() privileged. | |
615 | */ | |
616 | if (!drm_is_current_master(file_priv) && !capable(CAP_SYS_ADMIN)) { | |
617 | ret = 0; | |
618 | goto out; | |
619 | } | |
620 | ||
621 | for (i = 0; i < fb->format->num_planes; i++) { | |
622 | int j; | |
623 | ||
624 | /* If we reuse the same object for multiple planes, also | |
625 | * return the same handle. | |
626 | */ | |
627 | for (j = 0; j < i; j++) { | |
628 | if (fb->obj[i] == fb->obj[j]) { | |
629 | r->handles[i] = r->handles[j]; | |
630 | break; | |
631 | } | |
632 | } | |
633 | ||
634 | if (r->handles[i]) | |
635 | continue; | |
636 | ||
637 | if (fb->obj[i]) { | |
638 | ret = drm_gem_handle_create(file_priv, fb->obj[i], | |
639 | &r->handles[i]); | |
640 | } else { | |
641 | WARN_ON(i > 0); | |
642 | ret = fb->funcs->create_handle(fb, file_priv, | |
643 | &r->handles[i]); | |
644 | } | |
645 | ||
646 | if (ret != 0) | |
647 | goto out; | |
648 | } | |
649 | ||
650 | out: | |
651 | if (ret != 0) { | |
652 | /* Delete any previously-created handles on failure. */ | |
653 | for (i = 0; i < ARRAY_SIZE(r->handles); i++) { | |
654 | int j; | |
655 | ||
656 | if (r->handles[i]) | |
657 | drm_gem_handle_delete(file_priv, r->handles[i]); | |
658 | ||
659 | /* Zero out any handles identical to the one we just | |
660 | * deleted. | |
661 | */ | |
662 | for (j = i + 1; j < ARRAY_SIZE(r->handles); j++) { | |
663 | if (r->handles[j] == r->handles[i]) | |
664 | r->handles[j] = 0; | |
665 | } | |
666 | } | |
667 | } | |
668 | ||
669 | drm_framebuffer_put(fb); | |
7520a277 DV |
670 | return ret; |
671 | } | |
672 | ||
673 | /** | |
674 | * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB | |
675 | * @dev: drm device for the ioctl | |
676 | * @data: data pointer for the ioctl | |
677 | * @file_priv: drm file for the ioctl call | |
678 | * | |
679 | * Lookup the FB and flush out the damaged area supplied by userspace as a clip | |
680 | * rectangle list. Generic userspace which does frontbuffer rendering must call | |
681 | * this ioctl to flush out the changes on manual-update display outputs, e.g. | |
682 | * usb display-link, mipi manual update panels or edp panel self refresh modes. | |
683 | * | |
684 | * Modesetting drivers which always update the frontbuffer do not need to | |
d574528a | 685 | * implement the corresponding &drm_framebuffer_funcs.dirty callback. |
7520a277 DV |
686 | * |
687 | * Called by the user via ioctl. | |
688 | * | |
689 | * Returns: | |
690 | * Zero on success, negative errno on failure. | |
691 | */ | |
692 | int drm_mode_dirtyfb_ioctl(struct drm_device *dev, | |
693 | void *data, struct drm_file *file_priv) | |
694 | { | |
695 | struct drm_clip_rect __user *clips_ptr; | |
696 | struct drm_clip_rect *clips = NULL; | |
697 | struct drm_mode_fb_dirty_cmd *r = data; | |
698 | struct drm_framebuffer *fb; | |
699 | unsigned flags; | |
700 | int num_clips; | |
701 | int ret; | |
702 | ||
703 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 704 | return -EOPNOTSUPP; |
7520a277 | 705 | |
418da172 | 706 | fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id); |
7520a277 DV |
707 | if (!fb) |
708 | return -ENOENT; | |
709 | ||
710 | num_clips = r->num_clips; | |
711 | clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; | |
712 | ||
713 | if (!num_clips != !clips_ptr) { | |
714 | ret = -EINVAL; | |
715 | goto out_err1; | |
716 | } | |
717 | ||
718 | flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; | |
719 | ||
720 | /* If userspace annotates copy, clips must come in pairs */ | |
721 | if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { | |
722 | ret = -EINVAL; | |
723 | goto out_err1; | |
724 | } | |
725 | ||
726 | if (num_clips && clips_ptr) { | |
727 | if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { | |
728 | ret = -EINVAL; | |
729 | goto out_err1; | |
730 | } | |
731 | clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); | |
732 | if (!clips) { | |
733 | ret = -ENOMEM; | |
734 | goto out_err1; | |
735 | } | |
736 | ||
737 | ret = copy_from_user(clips, clips_ptr, | |
738 | num_clips * sizeof(*clips)); | |
739 | if (ret) { | |
740 | ret = -EFAULT; | |
741 | goto out_err2; | |
742 | } | |
743 | } | |
744 | ||
745 | if (fb->funcs->dirty) { | |
746 | ret = fb->funcs->dirty(fb, file_priv, flags, r->color, | |
747 | clips, num_clips); | |
748 | } else { | |
749 | ret = -ENOSYS; | |
750 | } | |
751 | ||
752 | out_err2: | |
753 | kfree(clips); | |
754 | out_err1: | |
a4a69da0 | 755 | drm_framebuffer_put(fb); |
7520a277 DV |
756 | |
757 | return ret; | |
758 | } | |
759 | ||
760 | /** | |
761 | * drm_fb_release - remove and free the FBs on this file | |
762 | * @priv: drm file for the ioctl | |
763 | * | |
764 | * Destroy all the FBs associated with @filp. | |
765 | * | |
766 | * Called by the user via ioctl. | |
767 | * | |
768 | * Returns: | |
769 | * Zero on success, negative errno on failure. | |
770 | */ | |
771 | void drm_fb_release(struct drm_file *priv) | |
772 | { | |
773 | struct drm_framebuffer *fb, *tfb; | |
774 | struct drm_mode_rmfb_work arg; | |
775 | ||
776 | INIT_LIST_HEAD(&arg.fbs); | |
777 | ||
778 | /* | |
779 | * When the file gets released that means no one else can access the fb | |
780 | * list any more, so no need to grab fpriv->fbs_lock. And we need to | |
781 | * avoid upsetting lockdep since the universal cursor code adds a | |
782 | * framebuffer while holding mutex locks. | |
783 | * | |
784 | * Note that a real deadlock between fpriv->fbs_lock and the modeset | |
785 | * locks is impossible here since no one else but this function can get | |
786 | * at it any more. | |
787 | */ | |
788 | list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { | |
789 | if (drm_framebuffer_read_refcount(fb) > 1) { | |
790 | list_move_tail(&fb->filp_head, &arg.fbs); | |
791 | } else { | |
792 | list_del_init(&fb->filp_head); | |
793 | ||
794 | /* This drops the fpriv->fbs reference. */ | |
a4a69da0 | 795 | drm_framebuffer_put(fb); |
7520a277 DV |
796 | } |
797 | } | |
798 | ||
799 | if (!list_empty(&arg.fbs)) { | |
800 | INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); | |
801 | ||
802 | schedule_work(&arg.work); | |
803 | flush_work(&arg.work); | |
804 | destroy_work_on_stack(&arg.work); | |
805 | } | |
806 | } | |
807 | ||
808 | void drm_framebuffer_free(struct kref *kref) | |
809 | { | |
810 | struct drm_framebuffer *fb = | |
811 | container_of(kref, struct drm_framebuffer, base.refcount); | |
812 | struct drm_device *dev = fb->dev; | |
813 | ||
814 | /* | |
815 | * The lookup idr holds a weak reference, which has not necessarily been | |
816 | * removed at this point. Check for that. | |
817 | */ | |
818 | drm_mode_object_unregister(dev, &fb->base); | |
819 | ||
820 | fb->funcs->destroy(fb); | |
821 | } | |
822 | ||
823 | /** | |
824 | * drm_framebuffer_init - initialize a framebuffer | |
825 | * @dev: DRM device | |
826 | * @fb: framebuffer to be initialized | |
827 | * @funcs: ... with these functions | |
828 | * | |
829 | * Allocates an ID for the framebuffer's parent mode object, sets its mode | |
830 | * functions & device file and adds it to the master fd list. | |
831 | * | |
832 | * IMPORTANT: | |
833 | * This functions publishes the fb and makes it available for concurrent access | |
834 | * by other users. Which means by this point the fb _must_ be fully set up - | |
835 | * since all the fb attributes are invariant over its lifetime, no further | |
836 | * locking but only correct reference counting is required. | |
837 | * | |
838 | * Returns: | |
839 | * Zero on success, error code on failure. | |
840 | */ | |
841 | int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, | |
842 | const struct drm_framebuffer_funcs *funcs) | |
843 | { | |
844 | int ret; | |
845 | ||
570cec32 | 846 | if (WARN_ON_ONCE(fb->dev != dev || !fb->format)) |
95bce760 VS |
847 | return -EINVAL; |
848 | ||
7520a277 | 849 | INIT_LIST_HEAD(&fb->filp_head); |
95bce760 | 850 | |
7520a277 | 851 | fb->funcs = funcs; |
8d44e9e6 | 852 | strcpy(fb->comm, current->comm); |
7520a277 | 853 | |
2135ea7a TR |
854 | ret = __drm_mode_object_add(dev, &fb->base, DRM_MODE_OBJECT_FB, |
855 | false, drm_framebuffer_free); | |
7520a277 DV |
856 | if (ret) |
857 | goto out; | |
858 | ||
859 | mutex_lock(&dev->mode_config.fb_lock); | |
860 | dev->mode_config.num_fb++; | |
861 | list_add(&fb->head, &dev->mode_config.fb_list); | |
862 | mutex_unlock(&dev->mode_config.fb_lock); | |
863 | ||
864 | drm_mode_object_register(dev, &fb->base); | |
865 | out: | |
866 | return ret; | |
867 | } | |
868 | EXPORT_SYMBOL(drm_framebuffer_init); | |
869 | ||
870 | /** | |
871 | * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference | |
872 | * @dev: drm device | |
e7e62c7e | 873 | * @file_priv: drm file to check for lease against. |
7520a277 DV |
874 | * @id: id of the fb object |
875 | * | |
876 | * If successful, this grabs an additional reference to the framebuffer - | |
877 | * callers need to make sure to eventually unreference the returned framebuffer | |
a4a69da0 | 878 | * again, using drm_framebuffer_put(). |
7520a277 DV |
879 | */ |
880 | struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, | |
418da172 | 881 | struct drm_file *file_priv, |
7520a277 DV |
882 | uint32_t id) |
883 | { | |
884 | struct drm_mode_object *obj; | |
885 | struct drm_framebuffer *fb = NULL; | |
886 | ||
418da172 | 887 | obj = __drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_FB); |
7520a277 DV |
888 | if (obj) |
889 | fb = obj_to_fb(obj); | |
890 | return fb; | |
891 | } | |
892 | EXPORT_SYMBOL(drm_framebuffer_lookup); | |
893 | ||
894 | /** | |
895 | * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr | |
896 | * @fb: fb to unregister | |
897 | * | |
898 | * Drivers need to call this when cleaning up driver-private framebuffers, e.g. | |
1e55a53a | 899 | * those used for fbdev. Note that the caller must hold a reference of its own, |
7520a277 DV |
900 | * i.e. the object may not be destroyed through this call (since it'll lead to a |
901 | * locking inversion). | |
03e93ac7 RZ |
902 | * |
903 | * NOTE: This function is deprecated. For driver-private framebuffers it is not | |
904 | * recommended to embed a framebuffer struct info fbdev struct, instead, a | |
a4a69da0 TR |
905 | * framebuffer pointer is preferred and drm_framebuffer_put() should be called |
906 | * when the framebuffer is to be cleaned up. | |
7520a277 DV |
907 | */ |
908 | void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) | |
909 | { | |
910 | struct drm_device *dev; | |
911 | ||
912 | if (!fb) | |
913 | return; | |
914 | ||
915 | dev = fb->dev; | |
916 | ||
917 | /* Mark fb as reaped and drop idr ref. */ | |
918 | drm_mode_object_unregister(dev, &fb->base); | |
919 | } | |
920 | EXPORT_SYMBOL(drm_framebuffer_unregister_private); | |
921 | ||
922 | /** | |
923 | * drm_framebuffer_cleanup - remove a framebuffer object | |
924 | * @fb: framebuffer to remove | |
925 | * | |
926 | * Cleanup framebuffer. This function is intended to be used from the drivers | |
d574528a DV |
927 | * &drm_framebuffer_funcs.destroy callback. It can also be used to clean up |
928 | * driver private framebuffers embedded into a larger structure. | |
7520a277 | 929 | * |
d574528a | 930 | * Note that this function does not remove the fb from active usage - if it is |
7520a277 DV |
931 | * still used anywhere, hilarity can ensue since userspace could call getfb on |
932 | * the id and get back -EINVAL. Obviously no concern at driver unload time. | |
933 | * | |
934 | * Also, the framebuffer will not be removed from the lookup idr - for | |
935 | * user-created framebuffers this will happen in in the rmfb ioctl. For | |
936 | * driver-private objects (e.g. for fbdev) drivers need to explicitly call | |
937 | * drm_framebuffer_unregister_private. | |
938 | */ | |
939 | void drm_framebuffer_cleanup(struct drm_framebuffer *fb) | |
940 | { | |
941 | struct drm_device *dev = fb->dev; | |
942 | ||
943 | mutex_lock(&dev->mode_config.fb_lock); | |
944 | list_del(&fb->head); | |
945 | dev->mode_config.num_fb--; | |
946 | mutex_unlock(&dev->mode_config.fb_lock); | |
947 | } | |
948 | EXPORT_SYMBOL(drm_framebuffer_cleanup); | |
949 | ||
941b8caa DV |
950 | static int atomic_remove_fb(struct drm_framebuffer *fb) |
951 | { | |
952 | struct drm_modeset_acquire_ctx ctx; | |
953 | struct drm_device *dev = fb->dev; | |
954 | struct drm_atomic_state *state; | |
955 | struct drm_plane *plane; | |
bbb6fc43 | 956 | struct drm_connector *conn __maybe_unused; |
941b8caa | 957 | struct drm_connector_state *conn_state; |
846c7dfc | 958 | int i, ret; |
941b8caa | 959 | unsigned plane_mask; |
846c7dfc | 960 | bool disable_crtcs = false; |
941b8caa | 961 | |
846c7dfc | 962 | retry_disable: |
941b8caa | 963 | drm_modeset_acquire_init(&ctx, 0); |
846c7dfc ML |
964 | |
965 | state = drm_atomic_state_alloc(dev); | |
966 | if (!state) { | |
967 | ret = -ENOMEM; | |
968 | goto out; | |
969 | } | |
941b8caa DV |
970 | state->acquire_ctx = &ctx; |
971 | ||
972 | retry: | |
973 | plane_mask = 0; | |
974 | ret = drm_modeset_lock_all_ctx(dev, &ctx); | |
975 | if (ret) | |
976 | goto unlock; | |
977 | ||
978 | drm_for_each_plane(plane, dev) { | |
979 | struct drm_plane_state *plane_state; | |
980 | ||
981 | if (plane->state->fb != fb) | |
982 | continue; | |
983 | ||
984 | plane_state = drm_atomic_get_plane_state(state, plane); | |
985 | if (IS_ERR(plane_state)) { | |
986 | ret = PTR_ERR(plane_state); | |
987 | goto unlock; | |
988 | } | |
989 | ||
846c7dfc | 990 | if (disable_crtcs && plane_state->crtc->primary == plane) { |
941b8caa DV |
991 | struct drm_crtc_state *crtc_state; |
992 | ||
993 | crtc_state = drm_atomic_get_existing_crtc_state(state, plane_state->crtc); | |
994 | ||
995 | ret = drm_atomic_add_affected_connectors(state, plane_state->crtc); | |
996 | if (ret) | |
997 | goto unlock; | |
998 | ||
999 | crtc_state->active = false; | |
1000 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); | |
1001 | if (ret) | |
1002 | goto unlock; | |
1003 | } | |
1004 | ||
1005 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
1006 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
1007 | if (ret) | |
1008 | goto unlock; | |
1009 | ||
62f77ad0 | 1010 | plane_mask |= drm_plane_mask(plane); |
941b8caa DV |
1011 | } |
1012 | ||
846c7dfc | 1013 | /* This list is only filled when disable_crtcs is set. */ |
0c3eb123 | 1014 | for_each_new_connector_in_state(state, conn, conn_state, i) { |
941b8caa DV |
1015 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); |
1016 | ||
1017 | if (ret) | |
1018 | goto unlock; | |
1019 | } | |
1020 | ||
1021 | if (plane_mask) | |
1022 | ret = drm_atomic_commit(state); | |
1023 | ||
1024 | unlock: | |
941b8caa | 1025 | if (ret == -EDEADLK) { |
4086d90c | 1026 | drm_atomic_state_clear(state); |
941b8caa DV |
1027 | drm_modeset_backoff(&ctx); |
1028 | goto retry; | |
1029 | } | |
1030 | ||
1031 | drm_atomic_state_put(state); | |
1032 | ||
846c7dfc | 1033 | out: |
941b8caa DV |
1034 | drm_modeset_drop_locks(&ctx); |
1035 | drm_modeset_acquire_fini(&ctx); | |
1036 | ||
846c7dfc ML |
1037 | if (ret == -EINVAL && !disable_crtcs) { |
1038 | disable_crtcs = true; | |
1039 | goto retry_disable; | |
1040 | } | |
1041 | ||
941b8caa DV |
1042 | return ret; |
1043 | } | |
1044 | ||
1045 | static void legacy_remove_fb(struct drm_framebuffer *fb) | |
1046 | { | |
1047 | struct drm_device *dev = fb->dev; | |
1048 | struct drm_crtc *crtc; | |
1049 | struct drm_plane *plane; | |
1050 | ||
1051 | drm_modeset_lock_all(dev); | |
1052 | /* remove from any CRTC */ | |
1053 | drm_for_each_crtc(crtc, dev) { | |
1054 | if (crtc->primary->fb == fb) { | |
1055 | /* should turn off the crtc */ | |
1056 | if (drm_crtc_force_disable(crtc)) | |
1057 | DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); | |
1058 | } | |
1059 | } | |
1060 | ||
1061 | drm_for_each_plane(plane, dev) { | |
1062 | if (plane->fb == fb) | |
1063 | drm_plane_force_disable(plane); | |
1064 | } | |
1065 | drm_modeset_unlock_all(dev); | |
1066 | } | |
1067 | ||
7520a277 DV |
1068 | /** |
1069 | * drm_framebuffer_remove - remove and unreference a framebuffer object | |
1070 | * @fb: framebuffer to remove | |
1071 | * | |
1072 | * Scans all the CRTCs and planes in @dev's mode_config. If they're | |
1073 | * using @fb, removes it, setting it to NULL. Then drops the reference to the | |
1074 | * passed-in framebuffer. Might take the modeset locks. | |
1075 | * | |
1076 | * Note that this function optimizes the cleanup away if the caller holds the | |
1077 | * last reference to the framebuffer. It is also guaranteed to not take the | |
1078 | * modeset locks in this case. | |
1079 | */ | |
1080 | void drm_framebuffer_remove(struct drm_framebuffer *fb) | |
1081 | { | |
1082 | struct drm_device *dev; | |
7520a277 DV |
1083 | |
1084 | if (!fb) | |
1085 | return; | |
1086 | ||
1087 | dev = fb->dev; | |
1088 | ||
1089 | WARN_ON(!list_empty(&fb->filp_head)); | |
1090 | ||
1091 | /* | |
1092 | * drm ABI mandates that we remove any deleted framebuffers from active | |
1093 | * useage. But since most sane clients only remove framebuffers they no | |
1094 | * longer need, try to optimize this away. | |
1095 | * | |
1096 | * Since we're holding a reference ourselves, observing a refcount of 1 | |
1097 | * means that we're the last holder and can skip it. Also, the refcount | |
1098 | * can never increase from 1 again, so we don't need any barriers or | |
1099 | * locks. | |
1100 | * | |
1101 | * Note that userspace could try to race with use and instate a new | |
1102 | * usage _after_ we've cleared all current ones. End result will be an | |
1103 | * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot | |
1104 | * in this manner. | |
1105 | */ | |
1106 | if (drm_framebuffer_read_refcount(fb) > 1) { | |
db8f6403 | 1107 | if (drm_drv_uses_atomic_modeset(dev)) { |
941b8caa | 1108 | int ret = atomic_remove_fb(fb); |
948de842 | 1109 | |
db8f6403 | 1110 | WARN(ret, "atomic remove_fb failed with %i\n", ret); |
941b8caa DV |
1111 | } else |
1112 | legacy_remove_fb(fb); | |
7520a277 DV |
1113 | } |
1114 | ||
a4a69da0 | 1115 | drm_framebuffer_put(fb); |
7520a277 DV |
1116 | } |
1117 | EXPORT_SYMBOL(drm_framebuffer_remove); | |
8f8f6a6c VS |
1118 | |
1119 | /** | |
1120 | * drm_framebuffer_plane_width - width of the plane given the first plane | |
1121 | * @width: width of the first plane | |
1122 | * @fb: the framebuffer | |
1123 | * @plane: plane index | |
1124 | * | |
1125 | * Returns: | |
1126 | * The width of @plane, given that the width of the first plane is @width. | |
1127 | */ | |
1128 | int drm_framebuffer_plane_width(int width, | |
1129 | const struct drm_framebuffer *fb, int plane) | |
1130 | { | |
1131 | if (plane >= fb->format->num_planes) | |
1132 | return 0; | |
1133 | ||
568c5e45 | 1134 | return fb_plane_width(width, fb->format, plane); |
8f8f6a6c VS |
1135 | } |
1136 | EXPORT_SYMBOL(drm_framebuffer_plane_width); | |
1137 | ||
1138 | /** | |
1139 | * drm_framebuffer_plane_height - height of the plane given the first plane | |
1140 | * @height: height of the first plane | |
1141 | * @fb: the framebuffer | |
1142 | * @plane: plane index | |
1143 | * | |
1144 | * Returns: | |
1145 | * The height of @plane, given that the height of the first plane is @height. | |
1146 | */ | |
1147 | int drm_framebuffer_plane_height(int height, | |
1148 | const struct drm_framebuffer *fb, int plane) | |
1149 | { | |
1150 | if (plane >= fb->format->num_planes) | |
1151 | return 0; | |
1152 | ||
568c5e45 | 1153 | return fb_plane_height(height, fb->format, plane); |
8f8f6a6c VS |
1154 | } |
1155 | EXPORT_SYMBOL(drm_framebuffer_plane_height); | |
45d58b40 NT |
1156 | |
1157 | void drm_framebuffer_print_info(struct drm_printer *p, unsigned int indent, | |
1158 | const struct drm_framebuffer *fb) | |
1159 | { | |
45d58b40 NT |
1160 | unsigned int i; |
1161 | ||
8d44e9e6 | 1162 | drm_printf_indent(p, indent, "allocated by = %s\n", fb->comm); |
45d58b40 NT |
1163 | drm_printf_indent(p, indent, "refcount=%u\n", |
1164 | drm_framebuffer_read_refcount(fb)); | |
92f1d09c | 1165 | drm_printf_indent(p, indent, "format=%p4cc\n", &fb->format->format); |
45d58b40 NT |
1166 | drm_printf_indent(p, indent, "modifier=0x%llx\n", fb->modifier); |
1167 | drm_printf_indent(p, indent, "size=%ux%u\n", fb->width, fb->height); | |
1168 | drm_printf_indent(p, indent, "layers:\n"); | |
1169 | ||
1170 | for (i = 0; i < fb->format->num_planes; i++) { | |
1171 | drm_printf_indent(p, indent + 1, "size[%u]=%dx%d\n", i, | |
1172 | drm_framebuffer_plane_width(fb->width, fb, i), | |
1173 | drm_framebuffer_plane_height(fb->height, fb, i)); | |
1174 | drm_printf_indent(p, indent + 1, "pitch[%u]=%u\n", i, fb->pitches[i]); | |
1175 | drm_printf_indent(p, indent + 1, "offset[%u]=%u\n", i, fb->offsets[i]); | |
1176 | drm_printf_indent(p, indent + 1, "obj[%u]:%s\n", i, | |
1177 | fb->obj[i] ? "" : "(null)"); | |
1178 | if (fb->obj[i]) | |
1179 | drm_gem_print_info(p, indent + 2, fb->obj[i]); | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | #ifdef CONFIG_DEBUG_FS | |
1184 | static int drm_framebuffer_info(struct seq_file *m, void *data) | |
1185 | { | |
1186 | struct drm_info_node *node = m->private; | |
1187 | struct drm_device *dev = node->minor->dev; | |
1188 | struct drm_printer p = drm_seq_file_printer(m); | |
1189 | struct drm_framebuffer *fb; | |
1190 | ||
1191 | mutex_lock(&dev->mode_config.fb_lock); | |
1192 | drm_for_each_fb(fb, dev) { | |
1193 | drm_printf(&p, "framebuffer[%u]:\n", fb->base.id); | |
1194 | drm_framebuffer_print_info(&p, 1, fb); | |
1195 | } | |
1196 | mutex_unlock(&dev->mode_config.fb_lock); | |
1197 | ||
1198 | return 0; | |
1199 | } | |
1200 | ||
1201 | static const struct drm_info_list drm_framebuffer_debugfs_list[] = { | |
1202 | { "framebuffer", drm_framebuffer_info, 0 }, | |
1203 | }; | |
1204 | ||
7ce84471 | 1205 | void drm_framebuffer_debugfs_init(struct drm_minor *minor) |
45d58b40 | 1206 | { |
e196e140 WK |
1207 | drm_debugfs_create_files(drm_framebuffer_debugfs_list, |
1208 | ARRAY_SIZE(drm_framebuffer_debugfs_list), | |
1209 | minor->debugfs_root, minor); | |
45d58b40 NT |
1210 | } |
1211 | #endif |