Commit | Line | Data |
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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)) { |
b3c11ac2 | 180 | struct drm_format_name_buf format_name; |
c10496c8 | 181 | |
b3c11ac2 | 182 | DRM_DEBUG_KMS("bad framebuffer format %s\n", |
c10496c8 VS |
183 | drm_get_format_name(r->pixel_format, |
184 | &format_name)); | |
d5493490 | 185 | return -EINVAL; |
7520a277 DV |
186 | } |
187 | ||
33f673aa | 188 | if (r->width == 0) { |
7520a277 DV |
189 | DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); |
190 | return -EINVAL; | |
191 | } | |
192 | ||
33f673aa | 193 | if (r->height == 0) { |
7520a277 DV |
194 | DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); |
195 | return -EINVAL; | |
196 | } | |
197 | ||
bbd9caa0 BZ |
198 | /* now let the driver pick its own format info */ |
199 | info = drm_get_format_info(dev, r); | |
200 | ||
d5493490 | 201 | for (i = 0; i < info->num_planes; i++) { |
568c5e45 VS |
202 | unsigned int width = fb_plane_width(r->width, info, i); |
203 | unsigned int height = fb_plane_height(r->height, info, i); | |
8db2dc85 | 204 | unsigned int block_size = info->char_per_block[i]; |
042bf753 | 205 | u64 min_pitch = drm_format_info_min_pitch(info, i, width); |
7520a277 | 206 | |
8db2dc85 AG |
207 | if (!block_size && (r->modifier[i] == DRM_FORMAT_MOD_LINEAR)) { |
208 | DRM_DEBUG_KMS("Format requires non-linear modifier for plane %d\n", i); | |
209 | return -EINVAL; | |
210 | } | |
211 | ||
7520a277 DV |
212 | if (!r->handles[i]) { |
213 | DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); | |
214 | return -EINVAL; | |
215 | } | |
216 | ||
042bf753 | 217 | if (min_pitch > UINT_MAX) |
7520a277 DV |
218 | return -ERANGE; |
219 | ||
220 | if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) | |
221 | return -ERANGE; | |
222 | ||
8db2dc85 | 223 | if (block_size && r->pitches[i] < min_pitch) { |
7520a277 DV |
224 | DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); |
225 | return -EINVAL; | |
226 | } | |
227 | ||
228 | if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { | |
229 | DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", | |
230 | r->modifier[i], i); | |
231 | return -EINVAL; | |
232 | } | |
233 | ||
bae781b2 VS |
234 | if (r->flags & DRM_MODE_FB_MODIFIERS && |
235 | r->modifier[i] != r->modifier[0]) { | |
236 | DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", | |
237 | r->modifier[i], i); | |
238 | return -EINVAL; | |
239 | } | |
240 | ||
7520a277 DV |
241 | /* modifier specific checks: */ |
242 | switch (r->modifier[i]) { | |
243 | case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: | |
244 | /* NOTE: the pitch restriction may be lifted later if it turns | |
245 | * out that no hw has this restriction: | |
246 | */ | |
247 | if (r->pixel_format != DRM_FORMAT_NV12 || | |
248 | width % 128 || height % 32 || | |
249 | r->pitches[i] % 128) { | |
250 | DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); | |
251 | return -EINVAL; | |
252 | } | |
253 | break; | |
254 | ||
255 | default: | |
256 | break; | |
257 | } | |
258 | } | |
259 | ||
d5493490 | 260 | for (i = info->num_planes; i < 4; i++) { |
7520a277 DV |
261 | if (r->modifier[i]) { |
262 | DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); | |
263 | return -EINVAL; | |
264 | } | |
265 | ||
266 | /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ | |
267 | if (!(r->flags & DRM_MODE_FB_MODIFIERS)) | |
268 | continue; | |
269 | ||
270 | if (r->handles[i]) { | |
271 | DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); | |
272 | return -EINVAL; | |
273 | } | |
274 | ||
275 | if (r->pitches[i]) { | |
276 | DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); | |
277 | return -EINVAL; | |
278 | } | |
279 | ||
280 | if (r->offsets[i]) { | |
281 | DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); | |
282 | return -EINVAL; | |
283 | } | |
284 | } | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | struct drm_framebuffer * | |
290 | drm_internal_framebuffer_create(struct drm_device *dev, | |
291 | const struct drm_mode_fb_cmd2 *r, | |
292 | struct drm_file *file_priv) | |
293 | { | |
294 | struct drm_mode_config *config = &dev->mode_config; | |
295 | struct drm_framebuffer *fb; | |
296 | int ret; | |
297 | ||
298 | if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { | |
299 | DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); | |
300 | return ERR_PTR(-EINVAL); | |
301 | } | |
302 | ||
303 | if ((config->min_width > r->width) || (r->width > config->max_width)) { | |
304 | DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", | |
305 | r->width, config->min_width, config->max_width); | |
306 | return ERR_PTR(-EINVAL); | |
307 | } | |
308 | if ((config->min_height > r->height) || (r->height > config->max_height)) { | |
309 | DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", | |
310 | r->height, config->min_height, config->max_height); | |
311 | return ERR_PTR(-EINVAL); | |
312 | } | |
313 | ||
314 | if (r->flags & DRM_MODE_FB_MODIFIERS && | |
315 | !dev->mode_config.allow_fb_modifiers) { | |
316 | DRM_DEBUG_KMS("driver does not support fb modifiers\n"); | |
317 | return ERR_PTR(-EINVAL); | |
318 | } | |
319 | ||
6a0f9ebf | 320 | ret = framebuffer_check(dev, r); |
7520a277 DV |
321 | if (ret) |
322 | return ERR_PTR(ret); | |
323 | ||
324 | fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); | |
325 | if (IS_ERR(fb)) { | |
326 | DRM_DEBUG_KMS("could not create framebuffer\n"); | |
327 | return fb; | |
328 | } | |
329 | ||
330 | return fb; | |
331 | } | |
9aefed1f | 332 | EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_internal_framebuffer_create); |
7520a277 DV |
333 | |
334 | /** | |
335 | * drm_mode_addfb2 - add an FB to the graphics configuration | |
336 | * @dev: drm device for the ioctl | |
337 | * @data: data pointer for the ioctl | |
338 | * @file_priv: drm file for the ioctl call | |
339 | * | |
340 | * Add a new FB to the specified CRTC, given a user request with format. This is | |
341 | * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers | |
342 | * and uses fourcc codes as pixel format specifiers. | |
343 | * | |
344 | * Called by the user via ioctl. | |
345 | * | |
346 | * Returns: | |
347 | * Zero on success, negative errno on failure. | |
348 | */ | |
349 | int drm_mode_addfb2(struct drm_device *dev, | |
350 | void *data, struct drm_file *file_priv) | |
351 | { | |
352 | struct drm_mode_fb_cmd2 *r = data; | |
353 | struct drm_framebuffer *fb; | |
354 | ||
355 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 356 | return -EOPNOTSUPP; |
7520a277 DV |
357 | |
358 | fb = drm_internal_framebuffer_create(dev, r, file_priv); | |
359 | if (IS_ERR(fb)) | |
360 | return PTR_ERR(fb); | |
361 | ||
362 | DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); | |
363 | r->fb_id = fb->base.id; | |
364 | ||
365 | /* Transfer ownership to the filp for reaping on close */ | |
366 | mutex_lock(&file_priv->fbs_lock); | |
367 | list_add(&fb->filp_head, &file_priv->fbs); | |
368 | mutex_unlock(&file_priv->fbs_lock); | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
eae06120 GH |
373 | int drm_mode_addfb2_ioctl(struct drm_device *dev, |
374 | void *data, struct drm_file *file_priv) | |
375 | { | |
376 | #ifdef __BIG_ENDIAN | |
377 | if (!dev->mode_config.quirk_addfb_prefer_host_byte_order) { | |
378 | /* | |
379 | * Drivers must set the | |
380 | * quirk_addfb_prefer_host_byte_order quirk to make | |
381 | * the drm_mode_addfb() compat code work correctly on | |
382 | * bigendian machines. | |
383 | * | |
384 | * If they don't they interpret pixel_format values | |
385 | * incorrectly for bug compatibility, which in turn | |
386 | * implies the ADDFB2 ioctl does not work correctly | |
387 | * then. So block it to make userspace fallback to | |
388 | * ADDFB. | |
389 | */ | |
390 | DRM_DEBUG_KMS("addfb2 broken on bigendian"); | |
69fdf420 | 391 | return -EOPNOTSUPP; |
eae06120 GH |
392 | } |
393 | #endif | |
394 | return drm_mode_addfb2(dev, data, file_priv); | |
395 | } | |
396 | ||
7520a277 DV |
397 | struct drm_mode_rmfb_work { |
398 | struct work_struct work; | |
399 | struct list_head fbs; | |
400 | }; | |
401 | ||
402 | static void drm_mode_rmfb_work_fn(struct work_struct *w) | |
403 | { | |
404 | struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work); | |
405 | ||
406 | while (!list_empty(&arg->fbs)) { | |
407 | struct drm_framebuffer *fb = | |
408 | list_first_entry(&arg->fbs, typeof(*fb), filp_head); | |
409 | ||
410 | list_del_init(&fb->filp_head); | |
411 | drm_framebuffer_remove(fb); | |
412 | } | |
413 | } | |
414 | ||
415 | /** | |
416 | * drm_mode_rmfb - remove an FB from the configuration | |
d30827ce NT |
417 | * @dev: drm device |
418 | * @fb_id: id of framebuffer to remove | |
419 | * @file_priv: drm file | |
7520a277 | 420 | * |
d30827ce | 421 | * Remove the specified FB. |
7520a277 | 422 | * |
d30827ce | 423 | * Called by the user via ioctl, or by an in-kernel client. |
7520a277 DV |
424 | * |
425 | * Returns: | |
426 | * Zero on success, negative errno on failure. | |
427 | */ | |
d30827ce NT |
428 | int drm_mode_rmfb(struct drm_device *dev, u32 fb_id, |
429 | struct drm_file *file_priv) | |
7520a277 DV |
430 | { |
431 | struct drm_framebuffer *fb = NULL; | |
432 | struct drm_framebuffer *fbl = NULL; | |
7520a277 DV |
433 | int found = 0; |
434 | ||
435 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 436 | return -EOPNOTSUPP; |
7520a277 | 437 | |
d30827ce | 438 | fb = drm_framebuffer_lookup(dev, file_priv, fb_id); |
7520a277 DV |
439 | if (!fb) |
440 | return -ENOENT; | |
441 | ||
442 | mutex_lock(&file_priv->fbs_lock); | |
443 | list_for_each_entry(fbl, &file_priv->fbs, filp_head) | |
444 | if (fb == fbl) | |
445 | found = 1; | |
446 | if (!found) { | |
447 | mutex_unlock(&file_priv->fbs_lock); | |
448 | goto fail_unref; | |
449 | } | |
450 | ||
451 | list_del_init(&fb->filp_head); | |
452 | mutex_unlock(&file_priv->fbs_lock); | |
453 | ||
454 | /* drop the reference we picked up in framebuffer lookup */ | |
a4a69da0 | 455 | drm_framebuffer_put(fb); |
7520a277 DV |
456 | |
457 | /* | |
458 | * we now own the reference that was stored in the fbs list | |
459 | * | |
460 | * drm_framebuffer_remove may fail with -EINTR on pending signals, | |
461 | * so run this in a separate stack as there's no way to correctly | |
462 | * handle this after the fb is already removed from the lookup table. | |
463 | */ | |
464 | if (drm_framebuffer_read_refcount(fb) > 1) { | |
465 | struct drm_mode_rmfb_work arg; | |
466 | ||
467 | INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); | |
468 | INIT_LIST_HEAD(&arg.fbs); | |
469 | list_add_tail(&fb->filp_head, &arg.fbs); | |
470 | ||
471 | schedule_work(&arg.work); | |
472 | flush_work(&arg.work); | |
473 | destroy_work_on_stack(&arg.work); | |
474 | } else | |
a4a69da0 | 475 | drm_framebuffer_put(fb); |
7520a277 DV |
476 | |
477 | return 0; | |
478 | ||
479 | fail_unref: | |
a4a69da0 | 480 | drm_framebuffer_put(fb); |
7520a277 DV |
481 | return -ENOENT; |
482 | } | |
483 | ||
d30827ce NT |
484 | int drm_mode_rmfb_ioctl(struct drm_device *dev, |
485 | void *data, struct drm_file *file_priv) | |
486 | { | |
487 | uint32_t *fb_id = data; | |
488 | ||
489 | return drm_mode_rmfb(dev, *fb_id, file_priv); | |
490 | } | |
491 | ||
7520a277 DV |
492 | /** |
493 | * drm_mode_getfb - get FB info | |
494 | * @dev: drm device for the ioctl | |
495 | * @data: data pointer for the ioctl | |
496 | * @file_priv: drm file for the ioctl call | |
497 | * | |
498 | * Lookup the FB given its ID and return info about it. | |
499 | * | |
500 | * Called by the user via ioctl. | |
501 | * | |
502 | * Returns: | |
503 | * Zero on success, negative errno on failure. | |
504 | */ | |
505 | int drm_mode_getfb(struct drm_device *dev, | |
506 | void *data, struct drm_file *file_priv) | |
507 | { | |
508 | struct drm_mode_fb_cmd *r = data; | |
509 | struct drm_framebuffer *fb; | |
510 | int ret; | |
511 | ||
512 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 513 | return -EOPNOTSUPP; |
7520a277 | 514 | |
418da172 | 515 | fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id); |
7520a277 DV |
516 | if (!fb) |
517 | return -ENOENT; | |
518 | ||
b24791fe DS |
519 | /* Multi-planar framebuffers need getfb2. */ |
520 | if (fb->format->num_planes > 1) { | |
521 | ret = -EINVAL; | |
522 | goto out; | |
523 | } | |
524 | ||
487da617 DS |
525 | if (!fb->funcs->create_handle) { |
526 | ret = -ENODEV; | |
527 | goto out; | |
528 | } | |
529 | ||
7520a277 DV |
530 | r->height = fb->height; |
531 | r->width = fb->width; | |
b00c600e | 532 | r->depth = fb->format->depth; |
272725c7 | 533 | r->bpp = fb->format->cpp[0] * 8; |
7520a277 | 534 | r->pitch = fb->pitches[0]; |
487da617 DS |
535 | |
536 | /* GET_FB() is an unprivileged ioctl so we must not return a | |
537 | * buffer-handle to non-master processes! For | |
538 | * backwards-compatibility reasons, we cannot make GET_FB() privileged, | |
539 | * so just return an invalid handle for non-masters. | |
540 | */ | |
0d49f303 | 541 | if (!drm_is_current_master(file_priv) && !capable(CAP_SYS_ADMIN)) { |
487da617 DS |
542 | r->handle = 0; |
543 | ret = 0; | |
544 | goto out; | |
7520a277 DV |
545 | } |
546 | ||
487da617 DS |
547 | ret = fb->funcs->create_handle(fb, file_priv, &r->handle); |
548 | ||
b24791fe | 549 | out: |
a4a69da0 | 550 | drm_framebuffer_put(fb); |
455e00f1 DS |
551 | return ret; |
552 | } | |
553 | ||
554 | /** | |
e9d2871f | 555 | * drm_mode_getfb2_ioctl - get extended FB info |
455e00f1 DS |
556 | * @dev: drm device for the ioctl |
557 | * @data: data pointer for the ioctl | |
558 | * @file_priv: drm file for the ioctl call | |
559 | * | |
560 | * Lookup the FB given its ID and return info about it. | |
561 | * | |
562 | * Called by the user via ioctl. | |
563 | * | |
564 | * Returns: | |
565 | * Zero on success, negative errno on failure. | |
566 | */ | |
567 | int drm_mode_getfb2_ioctl(struct drm_device *dev, | |
568 | void *data, struct drm_file *file_priv) | |
569 | { | |
570 | struct drm_mode_fb_cmd2 *r = data; | |
571 | struct drm_framebuffer *fb; | |
572 | unsigned int i; | |
573 | int ret; | |
574 | ||
575 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
576 | return -EINVAL; | |
577 | ||
578 | fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id); | |
579 | if (!fb) | |
580 | return -ENOENT; | |
581 | ||
582 | /* For multi-plane framebuffers, we require the driver to place the | |
583 | * GEM objects directly in the drm_framebuffer. For single-plane | |
584 | * framebuffers, we can fall back to create_handle. | |
585 | */ | |
586 | if (!fb->obj[0] && | |
587 | (fb->format->num_planes > 1 || !fb->funcs->create_handle)) { | |
588 | ret = -ENODEV; | |
589 | goto out; | |
590 | } | |
591 | ||
592 | r->height = fb->height; | |
593 | r->width = fb->width; | |
594 | r->pixel_format = fb->format->format; | |
595 | ||
596 | r->flags = 0; | |
597 | if (dev->mode_config.allow_fb_modifiers) | |
598 | r->flags |= DRM_MODE_FB_MODIFIERS; | |
599 | ||
600 | for (i = 0; i < ARRAY_SIZE(r->handles); i++) { | |
601 | r->handles[i] = 0; | |
602 | r->pitches[i] = 0; | |
603 | r->offsets[i] = 0; | |
604 | r->modifier[i] = 0; | |
605 | } | |
7520a277 | 606 | |
455e00f1 DS |
607 | for (i = 0; i < fb->format->num_planes; i++) { |
608 | r->pitches[i] = fb->pitches[i]; | |
609 | r->offsets[i] = fb->offsets[i]; | |
610 | if (dev->mode_config.allow_fb_modifiers) | |
611 | r->modifier[i] = fb->modifier; | |
612 | } | |
613 | ||
614 | /* GET_FB2() is an unprivileged ioctl so we must not return a | |
615 | * buffer-handle to non master/root processes! To match GET_FB() | |
616 | * just return invalid handles (0) for non masters/root | |
617 | * rather than making GET_FB2() privileged. | |
618 | */ | |
619 | if (!drm_is_current_master(file_priv) && !capable(CAP_SYS_ADMIN)) { | |
620 | ret = 0; | |
621 | goto out; | |
622 | } | |
623 | ||
624 | for (i = 0; i < fb->format->num_planes; i++) { | |
625 | int j; | |
626 | ||
627 | /* If we reuse the same object for multiple planes, also | |
628 | * return the same handle. | |
629 | */ | |
630 | for (j = 0; j < i; j++) { | |
631 | if (fb->obj[i] == fb->obj[j]) { | |
632 | r->handles[i] = r->handles[j]; | |
633 | break; | |
634 | } | |
635 | } | |
636 | ||
637 | if (r->handles[i]) | |
638 | continue; | |
639 | ||
640 | if (fb->obj[i]) { | |
641 | ret = drm_gem_handle_create(file_priv, fb->obj[i], | |
642 | &r->handles[i]); | |
643 | } else { | |
644 | WARN_ON(i > 0); | |
645 | ret = fb->funcs->create_handle(fb, file_priv, | |
646 | &r->handles[i]); | |
647 | } | |
648 | ||
649 | if (ret != 0) | |
650 | goto out; | |
651 | } | |
652 | ||
653 | out: | |
654 | if (ret != 0) { | |
655 | /* Delete any previously-created handles on failure. */ | |
656 | for (i = 0; i < ARRAY_SIZE(r->handles); i++) { | |
657 | int j; | |
658 | ||
659 | if (r->handles[i]) | |
660 | drm_gem_handle_delete(file_priv, r->handles[i]); | |
661 | ||
662 | /* Zero out any handles identical to the one we just | |
663 | * deleted. | |
664 | */ | |
665 | for (j = i + 1; j < ARRAY_SIZE(r->handles); j++) { | |
666 | if (r->handles[j] == r->handles[i]) | |
667 | r->handles[j] = 0; | |
668 | } | |
669 | } | |
670 | } | |
671 | ||
672 | drm_framebuffer_put(fb); | |
7520a277 DV |
673 | return ret; |
674 | } | |
675 | ||
676 | /** | |
677 | * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB | |
678 | * @dev: drm device for the ioctl | |
679 | * @data: data pointer for the ioctl | |
680 | * @file_priv: drm file for the ioctl call | |
681 | * | |
682 | * Lookup the FB and flush out the damaged area supplied by userspace as a clip | |
683 | * rectangle list. Generic userspace which does frontbuffer rendering must call | |
684 | * this ioctl to flush out the changes on manual-update display outputs, e.g. | |
685 | * usb display-link, mipi manual update panels or edp panel self refresh modes. | |
686 | * | |
687 | * Modesetting drivers which always update the frontbuffer do not need to | |
d574528a | 688 | * implement the corresponding &drm_framebuffer_funcs.dirty callback. |
7520a277 DV |
689 | * |
690 | * Called by the user via ioctl. | |
691 | * | |
692 | * Returns: | |
693 | * Zero on success, negative errno on failure. | |
694 | */ | |
695 | int drm_mode_dirtyfb_ioctl(struct drm_device *dev, | |
696 | void *data, struct drm_file *file_priv) | |
697 | { | |
698 | struct drm_clip_rect __user *clips_ptr; | |
699 | struct drm_clip_rect *clips = NULL; | |
700 | struct drm_mode_fb_dirty_cmd *r = data; | |
701 | struct drm_framebuffer *fb; | |
702 | unsigned flags; | |
703 | int num_clips; | |
704 | int ret; | |
705 | ||
706 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 707 | return -EOPNOTSUPP; |
7520a277 | 708 | |
418da172 | 709 | fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id); |
7520a277 DV |
710 | if (!fb) |
711 | return -ENOENT; | |
712 | ||
713 | num_clips = r->num_clips; | |
714 | clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; | |
715 | ||
716 | if (!num_clips != !clips_ptr) { | |
717 | ret = -EINVAL; | |
718 | goto out_err1; | |
719 | } | |
720 | ||
721 | flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; | |
722 | ||
723 | /* If userspace annotates copy, clips must come in pairs */ | |
724 | if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { | |
725 | ret = -EINVAL; | |
726 | goto out_err1; | |
727 | } | |
728 | ||
729 | if (num_clips && clips_ptr) { | |
730 | if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { | |
731 | ret = -EINVAL; | |
732 | goto out_err1; | |
733 | } | |
734 | clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); | |
735 | if (!clips) { | |
736 | ret = -ENOMEM; | |
737 | goto out_err1; | |
738 | } | |
739 | ||
740 | ret = copy_from_user(clips, clips_ptr, | |
741 | num_clips * sizeof(*clips)); | |
742 | if (ret) { | |
743 | ret = -EFAULT; | |
744 | goto out_err2; | |
745 | } | |
746 | } | |
747 | ||
748 | if (fb->funcs->dirty) { | |
749 | ret = fb->funcs->dirty(fb, file_priv, flags, r->color, | |
750 | clips, num_clips); | |
751 | } else { | |
752 | ret = -ENOSYS; | |
753 | } | |
754 | ||
755 | out_err2: | |
756 | kfree(clips); | |
757 | out_err1: | |
a4a69da0 | 758 | drm_framebuffer_put(fb); |
7520a277 DV |
759 | |
760 | return ret; | |
761 | } | |
762 | ||
763 | /** | |
764 | * drm_fb_release - remove and free the FBs on this file | |
765 | * @priv: drm file for the ioctl | |
766 | * | |
767 | * Destroy all the FBs associated with @filp. | |
768 | * | |
769 | * Called by the user via ioctl. | |
770 | * | |
771 | * Returns: | |
772 | * Zero on success, negative errno on failure. | |
773 | */ | |
774 | void drm_fb_release(struct drm_file *priv) | |
775 | { | |
776 | struct drm_framebuffer *fb, *tfb; | |
777 | struct drm_mode_rmfb_work arg; | |
778 | ||
779 | INIT_LIST_HEAD(&arg.fbs); | |
780 | ||
781 | /* | |
782 | * When the file gets released that means no one else can access the fb | |
783 | * list any more, so no need to grab fpriv->fbs_lock. And we need to | |
784 | * avoid upsetting lockdep since the universal cursor code adds a | |
785 | * framebuffer while holding mutex locks. | |
786 | * | |
787 | * Note that a real deadlock between fpriv->fbs_lock and the modeset | |
788 | * locks is impossible here since no one else but this function can get | |
789 | * at it any more. | |
790 | */ | |
791 | list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { | |
792 | if (drm_framebuffer_read_refcount(fb) > 1) { | |
793 | list_move_tail(&fb->filp_head, &arg.fbs); | |
794 | } else { | |
795 | list_del_init(&fb->filp_head); | |
796 | ||
797 | /* This drops the fpriv->fbs reference. */ | |
a4a69da0 | 798 | drm_framebuffer_put(fb); |
7520a277 DV |
799 | } |
800 | } | |
801 | ||
802 | if (!list_empty(&arg.fbs)) { | |
803 | INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); | |
804 | ||
805 | schedule_work(&arg.work); | |
806 | flush_work(&arg.work); | |
807 | destroy_work_on_stack(&arg.work); | |
808 | } | |
809 | } | |
810 | ||
811 | void drm_framebuffer_free(struct kref *kref) | |
812 | { | |
813 | struct drm_framebuffer *fb = | |
814 | container_of(kref, struct drm_framebuffer, base.refcount); | |
815 | struct drm_device *dev = fb->dev; | |
816 | ||
817 | /* | |
818 | * The lookup idr holds a weak reference, which has not necessarily been | |
819 | * removed at this point. Check for that. | |
820 | */ | |
821 | drm_mode_object_unregister(dev, &fb->base); | |
822 | ||
823 | fb->funcs->destroy(fb); | |
824 | } | |
825 | ||
826 | /** | |
827 | * drm_framebuffer_init - initialize a framebuffer | |
828 | * @dev: DRM device | |
829 | * @fb: framebuffer to be initialized | |
830 | * @funcs: ... with these functions | |
831 | * | |
832 | * Allocates an ID for the framebuffer's parent mode object, sets its mode | |
833 | * functions & device file and adds it to the master fd list. | |
834 | * | |
835 | * IMPORTANT: | |
836 | * This functions publishes the fb and makes it available for concurrent access | |
837 | * by other users. Which means by this point the fb _must_ be fully set up - | |
838 | * since all the fb attributes are invariant over its lifetime, no further | |
839 | * locking but only correct reference counting is required. | |
840 | * | |
841 | * Returns: | |
842 | * Zero on success, error code on failure. | |
843 | */ | |
844 | int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, | |
845 | const struct drm_framebuffer_funcs *funcs) | |
846 | { | |
847 | int ret; | |
848 | ||
570cec32 | 849 | if (WARN_ON_ONCE(fb->dev != dev || !fb->format)) |
95bce760 VS |
850 | return -EINVAL; |
851 | ||
7520a277 | 852 | INIT_LIST_HEAD(&fb->filp_head); |
95bce760 | 853 | |
7520a277 | 854 | fb->funcs = funcs; |
8d44e9e6 | 855 | strcpy(fb->comm, current->comm); |
7520a277 | 856 | |
2135ea7a TR |
857 | ret = __drm_mode_object_add(dev, &fb->base, DRM_MODE_OBJECT_FB, |
858 | false, drm_framebuffer_free); | |
7520a277 DV |
859 | if (ret) |
860 | goto out; | |
861 | ||
862 | mutex_lock(&dev->mode_config.fb_lock); | |
863 | dev->mode_config.num_fb++; | |
864 | list_add(&fb->head, &dev->mode_config.fb_list); | |
865 | mutex_unlock(&dev->mode_config.fb_lock); | |
866 | ||
867 | drm_mode_object_register(dev, &fb->base); | |
868 | out: | |
869 | return ret; | |
870 | } | |
871 | EXPORT_SYMBOL(drm_framebuffer_init); | |
872 | ||
873 | /** | |
874 | * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference | |
875 | * @dev: drm device | |
e7e62c7e | 876 | * @file_priv: drm file to check for lease against. |
7520a277 DV |
877 | * @id: id of the fb object |
878 | * | |
879 | * If successful, this grabs an additional reference to the framebuffer - | |
880 | * callers need to make sure to eventually unreference the returned framebuffer | |
a4a69da0 | 881 | * again, using drm_framebuffer_put(). |
7520a277 DV |
882 | */ |
883 | struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, | |
418da172 | 884 | struct drm_file *file_priv, |
7520a277 DV |
885 | uint32_t id) |
886 | { | |
887 | struct drm_mode_object *obj; | |
888 | struct drm_framebuffer *fb = NULL; | |
889 | ||
418da172 | 890 | obj = __drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_FB); |
7520a277 DV |
891 | if (obj) |
892 | fb = obj_to_fb(obj); | |
893 | return fb; | |
894 | } | |
895 | EXPORT_SYMBOL(drm_framebuffer_lookup); | |
896 | ||
897 | /** | |
898 | * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr | |
899 | * @fb: fb to unregister | |
900 | * | |
901 | * Drivers need to call this when cleaning up driver-private framebuffers, e.g. | |
1e55a53a | 902 | * those used for fbdev. Note that the caller must hold a reference of its own, |
7520a277 DV |
903 | * i.e. the object may not be destroyed through this call (since it'll lead to a |
904 | * locking inversion). | |
03e93ac7 RZ |
905 | * |
906 | * NOTE: This function is deprecated. For driver-private framebuffers it is not | |
907 | * recommended to embed a framebuffer struct info fbdev struct, instead, a | |
a4a69da0 TR |
908 | * framebuffer pointer is preferred and drm_framebuffer_put() should be called |
909 | * when the framebuffer is to be cleaned up. | |
7520a277 DV |
910 | */ |
911 | void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) | |
912 | { | |
913 | struct drm_device *dev; | |
914 | ||
915 | if (!fb) | |
916 | return; | |
917 | ||
918 | dev = fb->dev; | |
919 | ||
920 | /* Mark fb as reaped and drop idr ref. */ | |
921 | drm_mode_object_unregister(dev, &fb->base); | |
922 | } | |
923 | EXPORT_SYMBOL(drm_framebuffer_unregister_private); | |
924 | ||
925 | /** | |
926 | * drm_framebuffer_cleanup - remove a framebuffer object | |
927 | * @fb: framebuffer to remove | |
928 | * | |
929 | * Cleanup framebuffer. This function is intended to be used from the drivers | |
d574528a DV |
930 | * &drm_framebuffer_funcs.destroy callback. It can also be used to clean up |
931 | * driver private framebuffers embedded into a larger structure. | |
7520a277 | 932 | * |
d574528a | 933 | * Note that this function does not remove the fb from active usage - if it is |
7520a277 DV |
934 | * still used anywhere, hilarity can ensue since userspace could call getfb on |
935 | * the id and get back -EINVAL. Obviously no concern at driver unload time. | |
936 | * | |
937 | * Also, the framebuffer will not be removed from the lookup idr - for | |
938 | * user-created framebuffers this will happen in in the rmfb ioctl. For | |
939 | * driver-private objects (e.g. for fbdev) drivers need to explicitly call | |
940 | * drm_framebuffer_unregister_private. | |
941 | */ | |
942 | void drm_framebuffer_cleanup(struct drm_framebuffer *fb) | |
943 | { | |
944 | struct drm_device *dev = fb->dev; | |
945 | ||
946 | mutex_lock(&dev->mode_config.fb_lock); | |
947 | list_del(&fb->head); | |
948 | dev->mode_config.num_fb--; | |
949 | mutex_unlock(&dev->mode_config.fb_lock); | |
950 | } | |
951 | EXPORT_SYMBOL(drm_framebuffer_cleanup); | |
952 | ||
941b8caa DV |
953 | static int atomic_remove_fb(struct drm_framebuffer *fb) |
954 | { | |
955 | struct drm_modeset_acquire_ctx ctx; | |
956 | struct drm_device *dev = fb->dev; | |
957 | struct drm_atomic_state *state; | |
958 | struct drm_plane *plane; | |
bbb6fc43 | 959 | struct drm_connector *conn __maybe_unused; |
941b8caa | 960 | struct drm_connector_state *conn_state; |
846c7dfc | 961 | int i, ret; |
941b8caa | 962 | unsigned plane_mask; |
846c7dfc | 963 | bool disable_crtcs = false; |
941b8caa | 964 | |
846c7dfc | 965 | retry_disable: |
941b8caa | 966 | drm_modeset_acquire_init(&ctx, 0); |
846c7dfc ML |
967 | |
968 | state = drm_atomic_state_alloc(dev); | |
969 | if (!state) { | |
970 | ret = -ENOMEM; | |
971 | goto out; | |
972 | } | |
941b8caa DV |
973 | state->acquire_ctx = &ctx; |
974 | ||
975 | retry: | |
976 | plane_mask = 0; | |
977 | ret = drm_modeset_lock_all_ctx(dev, &ctx); | |
978 | if (ret) | |
979 | goto unlock; | |
980 | ||
981 | drm_for_each_plane(plane, dev) { | |
982 | struct drm_plane_state *plane_state; | |
983 | ||
984 | if (plane->state->fb != fb) | |
985 | continue; | |
986 | ||
987 | plane_state = drm_atomic_get_plane_state(state, plane); | |
988 | if (IS_ERR(plane_state)) { | |
989 | ret = PTR_ERR(plane_state); | |
990 | goto unlock; | |
991 | } | |
992 | ||
846c7dfc | 993 | if (disable_crtcs && plane_state->crtc->primary == plane) { |
941b8caa DV |
994 | struct drm_crtc_state *crtc_state; |
995 | ||
996 | crtc_state = drm_atomic_get_existing_crtc_state(state, plane_state->crtc); | |
997 | ||
998 | ret = drm_atomic_add_affected_connectors(state, plane_state->crtc); | |
999 | if (ret) | |
1000 | goto unlock; | |
1001 | ||
1002 | crtc_state->active = false; | |
1003 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); | |
1004 | if (ret) | |
1005 | goto unlock; | |
1006 | } | |
1007 | ||
1008 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
1009 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
1010 | if (ret) | |
1011 | goto unlock; | |
1012 | ||
62f77ad0 | 1013 | plane_mask |= drm_plane_mask(plane); |
941b8caa DV |
1014 | } |
1015 | ||
846c7dfc | 1016 | /* This list is only filled when disable_crtcs is set. */ |
0c3eb123 | 1017 | for_each_new_connector_in_state(state, conn, conn_state, i) { |
941b8caa DV |
1018 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); |
1019 | ||
1020 | if (ret) | |
1021 | goto unlock; | |
1022 | } | |
1023 | ||
1024 | if (plane_mask) | |
1025 | ret = drm_atomic_commit(state); | |
1026 | ||
1027 | unlock: | |
941b8caa | 1028 | if (ret == -EDEADLK) { |
4086d90c | 1029 | drm_atomic_state_clear(state); |
941b8caa DV |
1030 | drm_modeset_backoff(&ctx); |
1031 | goto retry; | |
1032 | } | |
1033 | ||
1034 | drm_atomic_state_put(state); | |
1035 | ||
846c7dfc | 1036 | out: |
941b8caa DV |
1037 | drm_modeset_drop_locks(&ctx); |
1038 | drm_modeset_acquire_fini(&ctx); | |
1039 | ||
846c7dfc ML |
1040 | if (ret == -EINVAL && !disable_crtcs) { |
1041 | disable_crtcs = true; | |
1042 | goto retry_disable; | |
1043 | } | |
1044 | ||
941b8caa DV |
1045 | return ret; |
1046 | } | |
1047 | ||
1048 | static void legacy_remove_fb(struct drm_framebuffer *fb) | |
1049 | { | |
1050 | struct drm_device *dev = fb->dev; | |
1051 | struct drm_crtc *crtc; | |
1052 | struct drm_plane *plane; | |
1053 | ||
1054 | drm_modeset_lock_all(dev); | |
1055 | /* remove from any CRTC */ | |
1056 | drm_for_each_crtc(crtc, dev) { | |
1057 | if (crtc->primary->fb == fb) { | |
1058 | /* should turn off the crtc */ | |
1059 | if (drm_crtc_force_disable(crtc)) | |
1060 | DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | drm_for_each_plane(plane, dev) { | |
1065 | if (plane->fb == fb) | |
1066 | drm_plane_force_disable(plane); | |
1067 | } | |
1068 | drm_modeset_unlock_all(dev); | |
1069 | } | |
1070 | ||
7520a277 DV |
1071 | /** |
1072 | * drm_framebuffer_remove - remove and unreference a framebuffer object | |
1073 | * @fb: framebuffer to remove | |
1074 | * | |
1075 | * Scans all the CRTCs and planes in @dev's mode_config. If they're | |
1076 | * using @fb, removes it, setting it to NULL. Then drops the reference to the | |
1077 | * passed-in framebuffer. Might take the modeset locks. | |
1078 | * | |
1079 | * Note that this function optimizes the cleanup away if the caller holds the | |
1080 | * last reference to the framebuffer. It is also guaranteed to not take the | |
1081 | * modeset locks in this case. | |
1082 | */ | |
1083 | void drm_framebuffer_remove(struct drm_framebuffer *fb) | |
1084 | { | |
1085 | struct drm_device *dev; | |
7520a277 DV |
1086 | |
1087 | if (!fb) | |
1088 | return; | |
1089 | ||
1090 | dev = fb->dev; | |
1091 | ||
1092 | WARN_ON(!list_empty(&fb->filp_head)); | |
1093 | ||
1094 | /* | |
1095 | * drm ABI mandates that we remove any deleted framebuffers from active | |
1096 | * useage. But since most sane clients only remove framebuffers they no | |
1097 | * longer need, try to optimize this away. | |
1098 | * | |
1099 | * Since we're holding a reference ourselves, observing a refcount of 1 | |
1100 | * means that we're the last holder and can skip it. Also, the refcount | |
1101 | * can never increase from 1 again, so we don't need any barriers or | |
1102 | * locks. | |
1103 | * | |
1104 | * Note that userspace could try to race with use and instate a new | |
1105 | * usage _after_ we've cleared all current ones. End result will be an | |
1106 | * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot | |
1107 | * in this manner. | |
1108 | */ | |
1109 | if (drm_framebuffer_read_refcount(fb) > 1) { | |
db8f6403 | 1110 | if (drm_drv_uses_atomic_modeset(dev)) { |
941b8caa | 1111 | int ret = atomic_remove_fb(fb); |
948de842 | 1112 | |
db8f6403 | 1113 | WARN(ret, "atomic remove_fb failed with %i\n", ret); |
941b8caa DV |
1114 | } else |
1115 | legacy_remove_fb(fb); | |
7520a277 DV |
1116 | } |
1117 | ||
a4a69da0 | 1118 | drm_framebuffer_put(fb); |
7520a277 DV |
1119 | } |
1120 | EXPORT_SYMBOL(drm_framebuffer_remove); | |
8f8f6a6c VS |
1121 | |
1122 | /** | |
1123 | * drm_framebuffer_plane_width - width of the plane given the first plane | |
1124 | * @width: width of the first plane | |
1125 | * @fb: the framebuffer | |
1126 | * @plane: plane index | |
1127 | * | |
1128 | * Returns: | |
1129 | * The width of @plane, given that the width of the first plane is @width. | |
1130 | */ | |
1131 | int drm_framebuffer_plane_width(int width, | |
1132 | const struct drm_framebuffer *fb, int plane) | |
1133 | { | |
1134 | if (plane >= fb->format->num_planes) | |
1135 | return 0; | |
1136 | ||
568c5e45 | 1137 | return fb_plane_width(width, fb->format, plane); |
8f8f6a6c VS |
1138 | } |
1139 | EXPORT_SYMBOL(drm_framebuffer_plane_width); | |
1140 | ||
1141 | /** | |
1142 | * drm_framebuffer_plane_height - height of the plane given the first plane | |
1143 | * @height: height of the first plane | |
1144 | * @fb: the framebuffer | |
1145 | * @plane: plane index | |
1146 | * | |
1147 | * Returns: | |
1148 | * The height of @plane, given that the height of the first plane is @height. | |
1149 | */ | |
1150 | int drm_framebuffer_plane_height(int height, | |
1151 | const struct drm_framebuffer *fb, int plane) | |
1152 | { | |
1153 | if (plane >= fb->format->num_planes) | |
1154 | return 0; | |
1155 | ||
568c5e45 | 1156 | return fb_plane_height(height, fb->format, plane); |
8f8f6a6c VS |
1157 | } |
1158 | EXPORT_SYMBOL(drm_framebuffer_plane_height); | |
45d58b40 NT |
1159 | |
1160 | void drm_framebuffer_print_info(struct drm_printer *p, unsigned int indent, | |
1161 | const struct drm_framebuffer *fb) | |
1162 | { | |
1163 | struct drm_format_name_buf format_name; | |
1164 | unsigned int i; | |
1165 | ||
8d44e9e6 | 1166 | drm_printf_indent(p, indent, "allocated by = %s\n", fb->comm); |
45d58b40 NT |
1167 | drm_printf_indent(p, indent, "refcount=%u\n", |
1168 | drm_framebuffer_read_refcount(fb)); | |
1169 | drm_printf_indent(p, indent, "format=%s\n", | |
1170 | drm_get_format_name(fb->format->format, &format_name)); | |
1171 | drm_printf_indent(p, indent, "modifier=0x%llx\n", fb->modifier); | |
1172 | drm_printf_indent(p, indent, "size=%ux%u\n", fb->width, fb->height); | |
1173 | drm_printf_indent(p, indent, "layers:\n"); | |
1174 | ||
1175 | for (i = 0; i < fb->format->num_planes; i++) { | |
1176 | drm_printf_indent(p, indent + 1, "size[%u]=%dx%d\n", i, | |
1177 | drm_framebuffer_plane_width(fb->width, fb, i), | |
1178 | drm_framebuffer_plane_height(fb->height, fb, i)); | |
1179 | drm_printf_indent(p, indent + 1, "pitch[%u]=%u\n", i, fb->pitches[i]); | |
1180 | drm_printf_indent(p, indent + 1, "offset[%u]=%u\n", i, fb->offsets[i]); | |
1181 | drm_printf_indent(p, indent + 1, "obj[%u]:%s\n", i, | |
1182 | fb->obj[i] ? "" : "(null)"); | |
1183 | if (fb->obj[i]) | |
1184 | drm_gem_print_info(p, indent + 2, fb->obj[i]); | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | #ifdef CONFIG_DEBUG_FS | |
1189 | static int drm_framebuffer_info(struct seq_file *m, void *data) | |
1190 | { | |
1191 | struct drm_info_node *node = m->private; | |
1192 | struct drm_device *dev = node->minor->dev; | |
1193 | struct drm_printer p = drm_seq_file_printer(m); | |
1194 | struct drm_framebuffer *fb; | |
1195 | ||
1196 | mutex_lock(&dev->mode_config.fb_lock); | |
1197 | drm_for_each_fb(fb, dev) { | |
1198 | drm_printf(&p, "framebuffer[%u]:\n", fb->base.id); | |
1199 | drm_framebuffer_print_info(&p, 1, fb); | |
1200 | } | |
1201 | mutex_unlock(&dev->mode_config.fb_lock); | |
1202 | ||
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | static const struct drm_info_list drm_framebuffer_debugfs_list[] = { | |
1207 | { "framebuffer", drm_framebuffer_info, 0 }, | |
1208 | }; | |
1209 | ||
7ce84471 | 1210 | void drm_framebuffer_debugfs_init(struct drm_minor *minor) |
45d58b40 | 1211 | { |
e196e140 WK |
1212 | drm_debugfs_create_files(drm_framebuffer_debugfs_list, |
1213 | ARRAY_SIZE(drm_framebuffer_debugfs_list), | |
1214 | minor->debugfs_root, minor); | |
45d58b40 NT |
1215 | } |
1216 | #endif |