Commit | Line | Data |
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28a62277 BG |
1 | /* |
2 | * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com | |
3 | * | |
4 | * Copyright 2008 Ben Gamari <bgamari@gmail.com> | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the "Software"), | |
8 | * to deal in the Software without restriction, including without limitation | |
9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
10 | * and/or sell copies of the Software, and to permit persons to whom the | |
11 | * Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice (including the next | |
14 | * paragraph) shall be included in all copies or substantial portions of the | |
15 | * Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
21 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
22 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
23 | * OTHER DEALINGS IN THE SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include <linux/debugfs.h> | |
27 | #include <linux/seq_file.h> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
2d1a8a48 | 29 | #include <linux/export.h> |
4834442d | 30 | |
e896c132 | 31 | #include <drm/drm_client.h> |
4834442d | 32 | #include <drm/drm_debugfs.h> |
4cf2b281 | 33 | #include <drm/drm_edid.h> |
6559c901 | 34 | #include <drm/drm_atomic.h> |
c6fdea6e DV |
35 | #include <drm/drm_auth.h> |
36 | #include <drm/drm_gem.h> | |
4834442d DV |
37 | #include <drm/drmP.h> |
38 | ||
67d0ec4e | 39 | #include "drm_internal.h" |
5bc9cb4d | 40 | #include "drm_crtc_internal.h" |
28a62277 BG |
41 | |
42 | #if defined(CONFIG_DEBUG_FS) | |
43 | ||
44 | /*************************************************** | |
45 | * Initialization, etc. | |
46 | **************************************************/ | |
47 | ||
c6fdea6e DV |
48 | static int drm_name_info(struct seq_file *m, void *data) |
49 | { | |
50 | struct drm_info_node *node = (struct drm_info_node *) m->private; | |
51 | struct drm_minor *minor = node->minor; | |
52 | struct drm_device *dev = minor->dev; | |
53 | struct drm_master *master; | |
54 | ||
55 | mutex_lock(&dev->master_mutex); | |
56 | master = dev->master; | |
57 | seq_printf(m, "%s", dev->driver->name); | |
58 | if (dev->dev) | |
59 | seq_printf(m, " dev=%s", dev_name(dev->dev)); | |
60 | if (master && master->unique) | |
61 | seq_printf(m, " master=%s", master->unique); | |
62 | if (dev->unique) | |
63 | seq_printf(m, " unique=%s", dev->unique); | |
64 | seq_printf(m, "\n"); | |
65 | mutex_unlock(&dev->master_mutex); | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | static int drm_clients_info(struct seq_file *m, void *data) | |
71 | { | |
72 | struct drm_info_node *node = (struct drm_info_node *) m->private; | |
73 | struct drm_device *dev = node->minor->dev; | |
74 | struct drm_file *priv; | |
75 | kuid_t uid; | |
76 | ||
77 | seq_printf(m, | |
78 | "%20s %5s %3s master a %5s %10s\n", | |
79 | "command", | |
80 | "pid", | |
81 | "dev", | |
82 | "uid", | |
83 | "magic"); | |
84 | ||
85 | /* dev->filelist is sorted youngest first, but we want to present | |
86 | * oldest first (i.e. kernel, servers, clients), so walk backwardss. | |
87 | */ | |
88 | mutex_lock(&dev->filelist_mutex); | |
89 | list_for_each_entry_reverse(priv, &dev->filelist, lhead) { | |
90 | struct task_struct *task; | |
91 | ||
92 | rcu_read_lock(); /* locks pid_task()->comm */ | |
93 | task = pid_task(priv->pid, PIDTYPE_PID); | |
94 | uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID; | |
95 | seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n", | |
96 | task ? task->comm : "<unknown>", | |
97 | pid_vnr(priv->pid), | |
98 | priv->minor->index, | |
99 | drm_is_current_master(priv) ? 'y' : 'n', | |
100 | priv->authenticated ? 'y' : 'n', | |
101 | from_kuid_munged(seq_user_ns(m), uid), | |
102 | priv->magic); | |
103 | rcu_read_unlock(); | |
104 | } | |
105 | mutex_unlock(&dev->filelist_mutex); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static int drm_gem_one_name_info(int id, void *ptr, void *data) | |
110 | { | |
111 | struct drm_gem_object *obj = ptr; | |
112 | struct seq_file *m = data; | |
113 | ||
114 | seq_printf(m, "%6d %8zd %7d %8d\n", | |
115 | obj->name, obj->size, | |
116 | obj->handle_count, | |
117 | kref_read(&obj->refcount)); | |
118 | return 0; | |
119 | } | |
120 | ||
121 | static int drm_gem_name_info(struct seq_file *m, void *data) | |
122 | { | |
123 | struct drm_info_node *node = (struct drm_info_node *) m->private; | |
124 | struct drm_device *dev = node->minor->dev; | |
125 | ||
126 | seq_printf(m, " name size handles refcount\n"); | |
127 | ||
128 | mutex_lock(&dev->object_name_lock); | |
129 | idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m); | |
130 | mutex_unlock(&dev->object_name_lock); | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
36f73b2f | 135 | static const struct drm_info_list drm_debugfs_list[] = { |
28a62277 | 136 | {"name", drm_name_info, 0}, |
28a62277 | 137 | {"clients", drm_clients_info, 0}, |
28a62277 | 138 | {"gem_names", drm_gem_name_info, DRIVER_GEM}, |
28a62277 BG |
139 | }; |
140 | #define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list) | |
141 | ||
142 | ||
143 | static int drm_debugfs_open(struct inode *inode, struct file *file) | |
144 | { | |
145 | struct drm_info_node *node = inode->i_private; | |
146 | ||
147 | return single_open(file, node->info_ent->show, node); | |
148 | } | |
149 | ||
150 | ||
151 | static const struct file_operations drm_debugfs_fops = { | |
152 | .owner = THIS_MODULE, | |
153 | .open = drm_debugfs_open, | |
154 | .read = seq_read, | |
155 | .llseek = seq_lseek, | |
156 | .release = single_release, | |
157 | }; | |
158 | ||
159 | ||
160 | /** | |
0cad7f71 DV |
161 | * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM |
162 | * minor | |
163 | * @files: The array of files to create | |
164 | * @count: The number of files given | |
165 | * @root: DRI debugfs dir entry. | |
166 | * @minor: device minor number | |
28a62277 BG |
167 | * |
168 | * Create a given set of debugfs files represented by an array of | |
0cad7f71 | 169 | * &struct drm_info_list in the given root directory. These files will be removed |
086f2e5c | 170 | * automatically on drm_debugfs_cleanup(). |
28a62277 | 171 | */ |
7d74795b | 172 | int drm_debugfs_create_files(const struct drm_info_list *files, int count, |
28a62277 BG |
173 | struct dentry *root, struct drm_minor *minor) |
174 | { | |
175 | struct drm_device *dev = minor->dev; | |
176 | struct dentry *ent; | |
177 | struct drm_info_node *tmp; | |
28a62277 BG |
178 | int i, ret; |
179 | ||
180 | for (i = 0; i < count; i++) { | |
181 | u32 features = files[i].driver_features; | |
182 | ||
183 | if (features != 0 && | |
184 | (dev->driver->driver_features & features) != features) | |
185 | continue; | |
186 | ||
9a298b2a | 187 | tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL); |
d25e3a6f JS |
188 | if (tmp == NULL) { |
189 | ret = -1; | |
190 | goto fail; | |
191 | } | |
28a62277 BG |
192 | ent = debugfs_create_file(files[i].name, S_IFREG | S_IRUGO, |
193 | root, tmp, &drm_debugfs_fops); | |
194 | if (!ent) { | |
bcd599e7 AV |
195 | DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/%s\n", |
196 | root, files[i].name); | |
9a298b2a | 197 | kfree(tmp); |
28a62277 BG |
198 | ret = -1; |
199 | goto fail; | |
200 | } | |
201 | ||
202 | tmp->minor = minor; | |
203 | tmp->dent = ent; | |
204 | tmp->info_ent = &files[i]; | |
b3e067c0 MS |
205 | |
206 | mutex_lock(&minor->debugfs_lock); | |
207 | list_add(&tmp->list, &minor->debugfs_list); | |
208 | mutex_unlock(&minor->debugfs_lock); | |
28a62277 BG |
209 | } |
210 | return 0; | |
211 | ||
212 | fail: | |
213 | drm_debugfs_remove_files(files, count, minor); | |
214 | return ret; | |
215 | } | |
216 | EXPORT_SYMBOL(drm_debugfs_create_files); | |
217 | ||
28a62277 BG |
218 | int drm_debugfs_init(struct drm_minor *minor, int minor_id, |
219 | struct dentry *root) | |
220 | { | |
221 | struct drm_device *dev = minor->dev; | |
222 | char name[64]; | |
223 | int ret; | |
224 | ||
b3e067c0 MS |
225 | INIT_LIST_HEAD(&minor->debugfs_list); |
226 | mutex_init(&minor->debugfs_lock); | |
28a62277 BG |
227 | sprintf(name, "%d", minor_id); |
228 | minor->debugfs_root = debugfs_create_dir(name, root); | |
229 | if (!minor->debugfs_root) { | |
156f5a78 | 230 | DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name); |
28a62277 BG |
231 | return -1; |
232 | } | |
233 | ||
234 | ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, | |
235 | minor->debugfs_root, minor); | |
236 | if (ret) { | |
237 | debugfs_remove(minor->debugfs_root); | |
238 | minor->debugfs_root = NULL; | |
239 | DRM_ERROR("Failed to create core drm debugfs files\n"); | |
240 | return ret; | |
241 | } | |
242 | ||
3c499ea0 | 243 | if (drm_drv_uses_atomic_modeset(dev)) { |
6559c901 RC |
244 | ret = drm_atomic_debugfs_init(minor); |
245 | if (ret) { | |
246 | DRM_ERROR("Failed to create atomic debugfs files\n"); | |
247 | return ret; | |
248 | } | |
249 | } | |
250 | ||
0c51ef86 NT |
251 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
252 | ret = drm_framebuffer_debugfs_init(minor); | |
253 | if (ret) { | |
254 | DRM_ERROR("Failed to create framebuffer debugfs file\n"); | |
255 | return ret; | |
256 | } | |
e896c132 NT |
257 | |
258 | ret = drm_client_debugfs_init(minor); | |
259 | if (ret) { | |
260 | DRM_ERROR("Failed to create client debugfs file\n"); | |
261 | return ret; | |
262 | } | |
45d58b40 NT |
263 | } |
264 | ||
28a62277 BG |
265 | if (dev->driver->debugfs_init) { |
266 | ret = dev->driver->debugfs_init(minor); | |
267 | if (ret) { | |
268 | DRM_ERROR("DRM: Driver failed to initialize " | |
156f5a78 | 269 | "/sys/kernel/debug/dri.\n"); |
28a62277 BG |
270 | return ret; |
271 | } | |
272 | } | |
273 | return 0; | |
274 | } | |
275 | ||
276 | ||
7d74795b | 277 | int drm_debugfs_remove_files(const struct drm_info_list *files, int count, |
28a62277 BG |
278 | struct drm_minor *minor) |
279 | { | |
280 | struct list_head *pos, *q; | |
281 | struct drm_info_node *tmp; | |
282 | int i; | |
283 | ||
b3e067c0 | 284 | mutex_lock(&minor->debugfs_lock); |
28a62277 | 285 | for (i = 0; i < count; i++) { |
b3e067c0 | 286 | list_for_each_safe(pos, q, &minor->debugfs_list) { |
28a62277 BG |
287 | tmp = list_entry(pos, struct drm_info_node, list); |
288 | if (tmp->info_ent == &files[i]) { | |
289 | debugfs_remove(tmp->dent); | |
290 | list_del(pos); | |
9a298b2a | 291 | kfree(tmp); |
28a62277 BG |
292 | } |
293 | } | |
294 | } | |
b3e067c0 | 295 | mutex_unlock(&minor->debugfs_lock); |
28a62277 BG |
296 | return 0; |
297 | } | |
298 | EXPORT_SYMBOL(drm_debugfs_remove_files); | |
299 | ||
086f2e5c NT |
300 | static void drm_debugfs_remove_all_files(struct drm_minor *minor) |
301 | { | |
302 | struct drm_info_node *node, *tmp; | |
303 | ||
304 | mutex_lock(&minor->debugfs_lock); | |
305 | list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) { | |
306 | debugfs_remove(node->dent); | |
307 | list_del(&node->list); | |
308 | kfree(node); | |
309 | } | |
310 | mutex_unlock(&minor->debugfs_lock); | |
311 | } | |
312 | ||
28a62277 BG |
313 | int drm_debugfs_cleanup(struct drm_minor *minor) |
314 | { | |
28a62277 BG |
315 | if (!minor->debugfs_root) |
316 | return 0; | |
317 | ||
086f2e5c | 318 | drm_debugfs_remove_all_files(minor); |
28a62277 | 319 | |
086f2e5c | 320 | debugfs_remove_recursive(minor->debugfs_root); |
28a62277 BG |
321 | minor->debugfs_root = NULL; |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
30f65707 TW |
326 | static int connector_show(struct seq_file *m, void *data) |
327 | { | |
328 | struct drm_connector *connector = m->private; | |
30f65707 | 329 | |
6140cf20 | 330 | seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force)); |
30f65707 TW |
331 | |
332 | return 0; | |
333 | } | |
334 | ||
335 | static int connector_open(struct inode *inode, struct file *file) | |
336 | { | |
337 | struct drm_connector *dev = inode->i_private; | |
338 | ||
339 | return single_open(file, connector_show, dev); | |
340 | } | |
341 | ||
342 | static ssize_t connector_write(struct file *file, const char __user *ubuf, | |
343 | size_t len, loff_t *offp) | |
344 | { | |
345 | struct seq_file *m = file->private_data; | |
346 | struct drm_connector *connector = m->private; | |
347 | char buf[12]; | |
348 | ||
349 | if (len > sizeof(buf) - 1) | |
350 | return -EINVAL; | |
351 | ||
352 | if (copy_from_user(buf, ubuf, len)) | |
353 | return -EFAULT; | |
354 | ||
355 | buf[len] = '\0'; | |
356 | ||
357 | if (!strcmp(buf, "on")) | |
358 | connector->force = DRM_FORCE_ON; | |
359 | else if (!strcmp(buf, "digital")) | |
360 | connector->force = DRM_FORCE_ON_DIGITAL; | |
361 | else if (!strcmp(buf, "off")) | |
362 | connector->force = DRM_FORCE_OFF; | |
363 | else if (!strcmp(buf, "unspecified")) | |
364 | connector->force = DRM_FORCE_UNSPECIFIED; | |
365 | else | |
366 | return -EINVAL; | |
367 | ||
368 | return len; | |
369 | } | |
370 | ||
4cf2b281 TW |
371 | static int edid_show(struct seq_file *m, void *data) |
372 | { | |
373 | struct drm_connector *connector = m->private; | |
374 | struct drm_property_blob *edid = connector->edid_blob_ptr; | |
375 | ||
376 | if (connector->override_edid && edid) | |
377 | seq_write(m, edid->data, edid->length); | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | static int edid_open(struct inode *inode, struct file *file) | |
383 | { | |
384 | struct drm_connector *dev = inode->i_private; | |
385 | ||
386 | return single_open(file, edid_show, dev); | |
387 | } | |
388 | ||
389 | static ssize_t edid_write(struct file *file, const char __user *ubuf, | |
390 | size_t len, loff_t *offp) | |
391 | { | |
392 | struct seq_file *m = file->private_data; | |
393 | struct drm_connector *connector = m->private; | |
394 | char *buf; | |
395 | struct edid *edid; | |
396 | int ret; | |
397 | ||
398 | buf = memdup_user(ubuf, len); | |
399 | if (IS_ERR(buf)) | |
400 | return PTR_ERR(buf); | |
401 | ||
402 | edid = (struct edid *) buf; | |
403 | ||
404 | if (len == 5 && !strncmp(buf, "reset", 5)) { | |
405 | connector->override_edid = false; | |
c555f023 | 406 | ret = drm_connector_update_edid_property(connector, NULL); |
4cf2b281 TW |
407 | } else if (len < EDID_LENGTH || |
408 | EDID_LENGTH * (1 + edid->extensions) > len) | |
409 | ret = -EINVAL; | |
410 | else { | |
411 | connector->override_edid = false; | |
c555f023 | 412 | ret = drm_connector_update_edid_property(connector, edid); |
4cf2b281 TW |
413 | if (!ret) |
414 | connector->override_edid = true; | |
415 | } | |
416 | ||
417 | kfree(buf); | |
418 | ||
419 | return (ret) ? ret : len; | |
420 | } | |
421 | ||
422 | static const struct file_operations drm_edid_fops = { | |
423 | .owner = THIS_MODULE, | |
424 | .open = edid_open, | |
425 | .read = seq_read, | |
426 | .llseek = seq_lseek, | |
427 | .release = single_release, | |
428 | .write = edid_write | |
429 | }; | |
430 | ||
431 | ||
30f65707 TW |
432 | static const struct file_operations drm_connector_fops = { |
433 | .owner = THIS_MODULE, | |
434 | .open = connector_open, | |
435 | .read = seq_read, | |
436 | .llseek = seq_lseek, | |
437 | .release = single_release, | |
438 | .write = connector_write | |
439 | }; | |
440 | ||
441 | int drm_debugfs_connector_add(struct drm_connector *connector) | |
442 | { | |
443 | struct drm_minor *minor = connector->dev->primary; | |
444 | struct dentry *root, *ent; | |
445 | ||
446 | if (!minor->debugfs_root) | |
447 | return -1; | |
448 | ||
449 | root = debugfs_create_dir(connector->name, minor->debugfs_root); | |
450 | if (!root) | |
451 | return -ENOMEM; | |
452 | ||
453 | connector->debugfs_entry = root; | |
454 | ||
455 | /* force */ | |
456 | ent = debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector, | |
457 | &drm_connector_fops); | |
458 | if (!ent) | |
459 | goto error; | |
460 | ||
4cf2b281 TW |
461 | /* edid */ |
462 | ent = debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, | |
463 | connector, &drm_edid_fops); | |
464 | if (!ent) | |
465 | goto error; | |
466 | ||
30f65707 TW |
467 | return 0; |
468 | ||
469 | error: | |
470 | debugfs_remove_recursive(connector->debugfs_entry); | |
471 | connector->debugfs_entry = NULL; | |
472 | return -ENOMEM; | |
473 | } | |
474 | ||
475 | void drm_debugfs_connector_remove(struct drm_connector *connector) | |
476 | { | |
477 | if (!connector->debugfs_entry) | |
478 | return; | |
479 | ||
480 | debugfs_remove_recursive(connector->debugfs_entry); | |
481 | ||
482 | connector->debugfs_entry = NULL; | |
483 | } | |
484 | ||
9edbf1fa TV |
485 | int drm_debugfs_crtc_add(struct drm_crtc *crtc) |
486 | { | |
487 | struct drm_minor *minor = crtc->dev->primary; | |
488 | struct dentry *root; | |
489 | char *name; | |
490 | ||
491 | name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index); | |
492 | if (!name) | |
493 | return -ENOMEM; | |
494 | ||
495 | root = debugfs_create_dir(name, minor->debugfs_root); | |
496 | kfree(name); | |
497 | if (!root) | |
498 | return -ENOMEM; | |
499 | ||
500 | crtc->debugfs_entry = root; | |
501 | ||
502 | if (drm_debugfs_crtc_crc_add(crtc)) | |
503 | goto error; | |
28a62277 | 504 | |
9edbf1fa TV |
505 | return 0; |
506 | ||
507 | error: | |
508 | drm_debugfs_crtc_remove(crtc); | |
509 | return -ENOMEM; | |
510 | } | |
511 | ||
512 | void drm_debugfs_crtc_remove(struct drm_crtc *crtc) | |
513 | { | |
514 | debugfs_remove_recursive(crtc->debugfs_entry); | |
515 | crtc->debugfs_entry = NULL; | |
516 | } | |
517 | ||
518 | #endif /* CONFIG_DEBUG_FS */ |