Commit | Line | Data |
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28a62277 BG |
1 | /** |
2 | * \file drm_debugfs.c | |
3 | * debugfs support for DRM | |
4 | * | |
5 | * \author Ben Gamari <bgamari@gmail.com> | |
6 | */ | |
7 | ||
8 | /* | |
9 | * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com | |
10 | * | |
11 | * Copyright 2008 Ben Gamari <bgamari@gmail.com> | |
12 | * | |
13 | * Permission is hereby granted, free of charge, to any person obtaining a | |
14 | * copy of this software and associated documentation files (the "Software"), | |
15 | * to deal in the Software without restriction, including without limitation | |
16 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
17 | * and/or sell copies of the Software, and to permit persons to whom the | |
18 | * Software is furnished to do so, subject to the following conditions: | |
19 | * | |
20 | * The above copyright notice and this permission notice (including the next | |
21 | * paragraph) shall be included in all copies or substantial portions of the | |
22 | * Software. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
25 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
26 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
27 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
28 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
29 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
30 | * OTHER DEALINGS IN THE SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include <linux/debugfs.h> | |
34 | #include <linux/seq_file.h> | |
5a0e3ad6 | 35 | #include <linux/slab.h> |
2d1a8a48 | 36 | #include <linux/export.h> |
760285e7 | 37 | #include <drm/drmP.h> |
4cf2b281 | 38 | #include <drm/drm_edid.h> |
67d0ec4e | 39 | #include "drm_internal.h" |
28a62277 BG |
40 | |
41 | #if defined(CONFIG_DEBUG_FS) | |
42 | ||
43 | /*************************************************** | |
44 | * Initialization, etc. | |
45 | **************************************************/ | |
46 | ||
36f73b2f | 47 | static const struct drm_info_list drm_debugfs_list[] = { |
28a62277 | 48 | {"name", drm_name_info, 0}, |
28a62277 | 49 | {"clients", drm_clients_info, 0}, |
28a62277 | 50 | {"gem_names", drm_gem_name_info, DRIVER_GEM}, |
28a62277 BG |
51 | }; |
52 | #define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list) | |
53 | ||
54 | ||
55 | static int drm_debugfs_open(struct inode *inode, struct file *file) | |
56 | { | |
57 | struct drm_info_node *node = inode->i_private; | |
58 | ||
59 | return single_open(file, node->info_ent->show, node); | |
60 | } | |
61 | ||
62 | ||
63 | static const struct file_operations drm_debugfs_fops = { | |
64 | .owner = THIS_MODULE, | |
65 | .open = drm_debugfs_open, | |
66 | .read = seq_read, | |
67 | .llseek = seq_lseek, | |
68 | .release = single_release, | |
69 | }; | |
70 | ||
71 | ||
72 | /** | |
73 | * Initialize a given set of debugfs files for a device | |
74 | * | |
75 | * \param files The array of files to create | |
76 | * \param count The number of files given | |
77 | * \param root DRI debugfs dir entry. | |
78 | * \param minor device minor number | |
79 | * \return Zero on success, non-zero on failure | |
80 | * | |
81 | * Create a given set of debugfs files represented by an array of | |
82 | * gdm_debugfs_lists in the given root directory. | |
83 | */ | |
7d74795b | 84 | int drm_debugfs_create_files(const struct drm_info_list *files, int count, |
28a62277 BG |
85 | struct dentry *root, struct drm_minor *minor) |
86 | { | |
87 | struct drm_device *dev = minor->dev; | |
88 | struct dentry *ent; | |
89 | struct drm_info_node *tmp; | |
28a62277 BG |
90 | int i, ret; |
91 | ||
92 | for (i = 0; i < count; i++) { | |
93 | u32 features = files[i].driver_features; | |
94 | ||
95 | if (features != 0 && | |
96 | (dev->driver->driver_features & features) != features) | |
97 | continue; | |
98 | ||
9a298b2a | 99 | tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL); |
d25e3a6f JS |
100 | if (tmp == NULL) { |
101 | ret = -1; | |
102 | goto fail; | |
103 | } | |
28a62277 BG |
104 | ent = debugfs_create_file(files[i].name, S_IFREG | S_IRUGO, |
105 | root, tmp, &drm_debugfs_fops); | |
106 | if (!ent) { | |
156f5a78 | 107 | DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s/%s\n", |
bd8315c4 | 108 | root->d_name.name, files[i].name); |
9a298b2a | 109 | kfree(tmp); |
28a62277 BG |
110 | ret = -1; |
111 | goto fail; | |
112 | } | |
113 | ||
114 | tmp->minor = minor; | |
115 | tmp->dent = ent; | |
116 | tmp->info_ent = &files[i]; | |
b3e067c0 MS |
117 | |
118 | mutex_lock(&minor->debugfs_lock); | |
119 | list_add(&tmp->list, &minor->debugfs_list); | |
120 | mutex_unlock(&minor->debugfs_lock); | |
28a62277 BG |
121 | } |
122 | return 0; | |
123 | ||
124 | fail: | |
125 | drm_debugfs_remove_files(files, count, minor); | |
126 | return ret; | |
127 | } | |
128 | EXPORT_SYMBOL(drm_debugfs_create_files); | |
129 | ||
130 | /** | |
131 | * Initialize the DRI debugfs filesystem for a device | |
132 | * | |
133 | * \param dev DRM device | |
134 | * \param minor device minor number | |
135 | * \param root DRI debugfs dir entry. | |
136 | * | |
156f5a78 GL |
137 | * Create the DRI debugfs root entry "/sys/kernel/debug/dri", the device debugfs root entry |
138 | * "/sys/kernel/debug/dri/%minor%/", and each entry in debugfs_list as | |
139 | * "/sys/kernel/debug/dri/%minor%/%name%". | |
28a62277 BG |
140 | */ |
141 | int drm_debugfs_init(struct drm_minor *minor, int minor_id, | |
142 | struct dentry *root) | |
143 | { | |
144 | struct drm_device *dev = minor->dev; | |
145 | char name[64]; | |
146 | int ret; | |
147 | ||
b3e067c0 MS |
148 | INIT_LIST_HEAD(&minor->debugfs_list); |
149 | mutex_init(&minor->debugfs_lock); | |
28a62277 BG |
150 | sprintf(name, "%d", minor_id); |
151 | minor->debugfs_root = debugfs_create_dir(name, root); | |
152 | if (!minor->debugfs_root) { | |
156f5a78 | 153 | DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name); |
28a62277 BG |
154 | return -1; |
155 | } | |
156 | ||
157 | ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, | |
158 | minor->debugfs_root, minor); | |
159 | if (ret) { | |
160 | debugfs_remove(minor->debugfs_root); | |
161 | minor->debugfs_root = NULL; | |
162 | DRM_ERROR("Failed to create core drm debugfs files\n"); | |
163 | return ret; | |
164 | } | |
165 | ||
166 | if (dev->driver->debugfs_init) { | |
167 | ret = dev->driver->debugfs_init(minor); | |
168 | if (ret) { | |
169 | DRM_ERROR("DRM: Driver failed to initialize " | |
156f5a78 | 170 | "/sys/kernel/debug/dri.\n"); |
28a62277 BG |
171 | return ret; |
172 | } | |
173 | } | |
174 | return 0; | |
175 | } | |
176 | ||
177 | ||
178 | /** | |
179 | * Remove a list of debugfs files | |
180 | * | |
181 | * \param files The list of files | |
182 | * \param count The number of files | |
183 | * \param minor The minor of which we should remove the files | |
184 | * \return always zero. | |
185 | * | |
186 | * Remove all debugfs entries created by debugfs_init(). | |
187 | */ | |
7d74795b | 188 | int drm_debugfs_remove_files(const struct drm_info_list *files, int count, |
28a62277 BG |
189 | struct drm_minor *minor) |
190 | { | |
191 | struct list_head *pos, *q; | |
192 | struct drm_info_node *tmp; | |
193 | int i; | |
194 | ||
b3e067c0 | 195 | mutex_lock(&minor->debugfs_lock); |
28a62277 | 196 | for (i = 0; i < count; i++) { |
b3e067c0 | 197 | list_for_each_safe(pos, q, &minor->debugfs_list) { |
28a62277 BG |
198 | tmp = list_entry(pos, struct drm_info_node, list); |
199 | if (tmp->info_ent == &files[i]) { | |
200 | debugfs_remove(tmp->dent); | |
201 | list_del(pos); | |
9a298b2a | 202 | kfree(tmp); |
28a62277 BG |
203 | } |
204 | } | |
205 | } | |
b3e067c0 | 206 | mutex_unlock(&minor->debugfs_lock); |
28a62277 BG |
207 | return 0; |
208 | } | |
209 | EXPORT_SYMBOL(drm_debugfs_remove_files); | |
210 | ||
211 | /** | |
212 | * Cleanup the debugfs filesystem resources. | |
213 | * | |
214 | * \param minor device minor number. | |
215 | * \return always zero. | |
216 | * | |
217 | * Remove all debugfs entries created by debugfs_init(). | |
218 | */ | |
219 | int drm_debugfs_cleanup(struct drm_minor *minor) | |
220 | { | |
221 | struct drm_device *dev = minor->dev; | |
222 | ||
223 | if (!minor->debugfs_root) | |
224 | return 0; | |
225 | ||
226 | if (dev->driver->debugfs_cleanup) | |
227 | dev->driver->debugfs_cleanup(minor); | |
228 | ||
229 | drm_debugfs_remove_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, minor); | |
230 | ||
231 | debugfs_remove(minor->debugfs_root); | |
232 | minor->debugfs_root = NULL; | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
30f65707 TW |
237 | static int connector_show(struct seq_file *m, void *data) |
238 | { | |
239 | struct drm_connector *connector = m->private; | |
240 | const char *status; | |
241 | ||
242 | switch (connector->force) { | |
243 | case DRM_FORCE_ON: | |
244 | status = "on\n"; | |
245 | break; | |
246 | ||
247 | case DRM_FORCE_ON_DIGITAL: | |
248 | status = "digital\n"; | |
249 | break; | |
250 | ||
251 | case DRM_FORCE_OFF: | |
252 | status = "off\n"; | |
253 | break; | |
254 | ||
255 | case DRM_FORCE_UNSPECIFIED: | |
256 | status = "unspecified\n"; | |
257 | break; | |
258 | ||
259 | default: | |
260 | return 0; | |
261 | } | |
262 | ||
263 | seq_puts(m, status); | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | static int connector_open(struct inode *inode, struct file *file) | |
269 | { | |
270 | struct drm_connector *dev = inode->i_private; | |
271 | ||
272 | return single_open(file, connector_show, dev); | |
273 | } | |
274 | ||
275 | static ssize_t connector_write(struct file *file, const char __user *ubuf, | |
276 | size_t len, loff_t *offp) | |
277 | { | |
278 | struct seq_file *m = file->private_data; | |
279 | struct drm_connector *connector = m->private; | |
280 | char buf[12]; | |
281 | ||
282 | if (len > sizeof(buf) - 1) | |
283 | return -EINVAL; | |
284 | ||
285 | if (copy_from_user(buf, ubuf, len)) | |
286 | return -EFAULT; | |
287 | ||
288 | buf[len] = '\0'; | |
289 | ||
290 | if (!strcmp(buf, "on")) | |
291 | connector->force = DRM_FORCE_ON; | |
292 | else if (!strcmp(buf, "digital")) | |
293 | connector->force = DRM_FORCE_ON_DIGITAL; | |
294 | else if (!strcmp(buf, "off")) | |
295 | connector->force = DRM_FORCE_OFF; | |
296 | else if (!strcmp(buf, "unspecified")) | |
297 | connector->force = DRM_FORCE_UNSPECIFIED; | |
298 | else | |
299 | return -EINVAL; | |
300 | ||
301 | return len; | |
302 | } | |
303 | ||
4cf2b281 TW |
304 | static int edid_show(struct seq_file *m, void *data) |
305 | { | |
306 | struct drm_connector *connector = m->private; | |
307 | struct drm_property_blob *edid = connector->edid_blob_ptr; | |
308 | ||
309 | if (connector->override_edid && edid) | |
310 | seq_write(m, edid->data, edid->length); | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | static int edid_open(struct inode *inode, struct file *file) | |
316 | { | |
317 | struct drm_connector *dev = inode->i_private; | |
318 | ||
319 | return single_open(file, edid_show, dev); | |
320 | } | |
321 | ||
322 | static ssize_t edid_write(struct file *file, const char __user *ubuf, | |
323 | size_t len, loff_t *offp) | |
324 | { | |
325 | struct seq_file *m = file->private_data; | |
326 | struct drm_connector *connector = m->private; | |
327 | char *buf; | |
328 | struct edid *edid; | |
329 | int ret; | |
330 | ||
331 | buf = memdup_user(ubuf, len); | |
332 | if (IS_ERR(buf)) | |
333 | return PTR_ERR(buf); | |
334 | ||
335 | edid = (struct edid *) buf; | |
336 | ||
337 | if (len == 5 && !strncmp(buf, "reset", 5)) { | |
338 | connector->override_edid = false; | |
339 | ret = drm_mode_connector_update_edid_property(connector, NULL); | |
340 | } else if (len < EDID_LENGTH || | |
341 | EDID_LENGTH * (1 + edid->extensions) > len) | |
342 | ret = -EINVAL; | |
343 | else { | |
344 | connector->override_edid = false; | |
345 | ret = drm_mode_connector_update_edid_property(connector, edid); | |
346 | if (!ret) | |
347 | connector->override_edid = true; | |
348 | } | |
349 | ||
350 | kfree(buf); | |
351 | ||
352 | return (ret) ? ret : len; | |
353 | } | |
354 | ||
355 | static const struct file_operations drm_edid_fops = { | |
356 | .owner = THIS_MODULE, | |
357 | .open = edid_open, | |
358 | .read = seq_read, | |
359 | .llseek = seq_lseek, | |
360 | .release = single_release, | |
361 | .write = edid_write | |
362 | }; | |
363 | ||
364 | ||
30f65707 TW |
365 | static const struct file_operations drm_connector_fops = { |
366 | .owner = THIS_MODULE, | |
367 | .open = connector_open, | |
368 | .read = seq_read, | |
369 | .llseek = seq_lseek, | |
370 | .release = single_release, | |
371 | .write = connector_write | |
372 | }; | |
373 | ||
374 | int drm_debugfs_connector_add(struct drm_connector *connector) | |
375 | { | |
376 | struct drm_minor *minor = connector->dev->primary; | |
377 | struct dentry *root, *ent; | |
378 | ||
379 | if (!minor->debugfs_root) | |
380 | return -1; | |
381 | ||
382 | root = debugfs_create_dir(connector->name, minor->debugfs_root); | |
383 | if (!root) | |
384 | return -ENOMEM; | |
385 | ||
386 | connector->debugfs_entry = root; | |
387 | ||
388 | /* force */ | |
389 | ent = debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector, | |
390 | &drm_connector_fops); | |
391 | if (!ent) | |
392 | goto error; | |
393 | ||
4cf2b281 TW |
394 | /* edid */ |
395 | ent = debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, | |
396 | connector, &drm_edid_fops); | |
397 | if (!ent) | |
398 | goto error; | |
399 | ||
30f65707 TW |
400 | return 0; |
401 | ||
402 | error: | |
403 | debugfs_remove_recursive(connector->debugfs_entry); | |
404 | connector->debugfs_entry = NULL; | |
405 | return -ENOMEM; | |
406 | } | |
407 | ||
408 | void drm_debugfs_connector_remove(struct drm_connector *connector) | |
409 | { | |
410 | if (!connector->debugfs_entry) | |
411 | return; | |
412 | ||
413 | debugfs_remove_recursive(connector->debugfs_entry); | |
414 | ||
415 | connector->debugfs_entry = NULL; | |
416 | } | |
417 | ||
28a62277 BG |
418 | #endif /* CONFIG_DEBUG_FS */ |
419 |