Merge patch series "riscv: asid: switch to alternative way to fix stale TLB entries"
[linux-2.6-microblaze.git] / drivers / gpu / drm / drm_debugfs.c
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/export.h>
28 #include <linux/seq_file.h>
29 #include <linux/slab.h>
30 #include <linux/uaccess.h>
31
32 #include <drm/drm_atomic.h>
33 #include <drm/drm_auth.h>
34 #include <drm/drm_client.h>
35 #include <drm/drm_debugfs.h>
36 #include <drm/drm_device.h>
37 #include <drm/drm_drv.h>
38 #include <drm/drm_edid.h>
39 #include <drm/drm_file.h>
40 #include <drm/drm_gem.h>
41 #include <drm/drm_managed.h>
42
43 #include "drm_crtc_internal.h"
44 #include "drm_internal.h"
45
46 #if defined(CONFIG_DEBUG_FS)
47
48 /***************************************************
49  * Initialization, etc.
50  **************************************************/
51
52 static int drm_name_info(struct seq_file *m, void *data)
53 {
54         struct drm_debugfs_entry *entry = m->private;
55         struct drm_device *dev = entry->dev;
56         struct drm_master *master;
57
58         mutex_lock(&dev->master_mutex);
59         master = dev->master;
60         seq_printf(m, "%s", dev->driver->name);
61         if (dev->dev)
62                 seq_printf(m, " dev=%s", dev_name(dev->dev));
63         if (master && master->unique)
64                 seq_printf(m, " master=%s", master->unique);
65         if (dev->unique)
66                 seq_printf(m, " unique=%s", dev->unique);
67         seq_printf(m, "\n");
68         mutex_unlock(&dev->master_mutex);
69
70         return 0;
71 }
72
73 static int drm_clients_info(struct seq_file *m, void *data)
74 {
75         struct drm_debugfs_entry *entry = m->private;
76         struct drm_device *dev = entry->dev;
77         struct drm_file *priv;
78         kuid_t uid;
79
80         seq_printf(m,
81                    "%20s %5s %3s master a %5s %10s\n",
82                    "command",
83                    "pid",
84                    "dev",
85                    "uid",
86                    "magic");
87
88         /* dev->filelist is sorted youngest first, but we want to present
89          * oldest first (i.e. kernel, servers, clients), so walk backwardss.
90          */
91         mutex_lock(&dev->filelist_mutex);
92         list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
93                 struct task_struct *task;
94                 bool is_current_master = drm_is_current_master(priv);
95
96                 rcu_read_lock(); /* locks pid_task()->comm */
97                 task = pid_task(priv->pid, PIDTYPE_PID);
98                 uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
99                 seq_printf(m, "%20s %5d %3d   %c    %c %5d %10u\n",
100                            task ? task->comm : "<unknown>",
101                            pid_vnr(priv->pid),
102                            priv->minor->index,
103                            is_current_master ? 'y' : 'n',
104                            priv->authenticated ? 'y' : 'n',
105                            from_kuid_munged(seq_user_ns(m), uid),
106                            priv->magic);
107                 rcu_read_unlock();
108         }
109         mutex_unlock(&dev->filelist_mutex);
110         return 0;
111 }
112
113 static int drm_gem_one_name_info(int id, void *ptr, void *data)
114 {
115         struct drm_gem_object *obj = ptr;
116         struct seq_file *m = data;
117
118         seq_printf(m, "%6d %8zd %7d %8d\n",
119                    obj->name, obj->size,
120                    obj->handle_count,
121                    kref_read(&obj->refcount));
122         return 0;
123 }
124
125 static int drm_gem_name_info(struct seq_file *m, void *data)
126 {
127         struct drm_debugfs_entry *entry = m->private;
128         struct drm_device *dev = entry->dev;
129
130         seq_printf(m, "  name     size handles refcount\n");
131
132         mutex_lock(&dev->object_name_lock);
133         idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
134         mutex_unlock(&dev->object_name_lock);
135
136         return 0;
137 }
138
139 static const struct drm_debugfs_info drm_debugfs_list[] = {
140         {"name", drm_name_info, 0},
141         {"clients", drm_clients_info, 0},
142         {"gem_names", drm_gem_name_info, DRIVER_GEM},
143 };
144 #define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
145
146
147 static int drm_debugfs_open(struct inode *inode, struct file *file)
148 {
149         struct drm_info_node *node = inode->i_private;
150
151         return single_open(file, node->info_ent->show, node);
152 }
153
154 static int drm_debugfs_entry_open(struct inode *inode, struct file *file)
155 {
156         struct drm_debugfs_entry *entry = inode->i_private;
157         struct drm_debugfs_info *node = &entry->file;
158
159         return single_open(file, node->show, entry);
160 }
161
162 static const struct file_operations drm_debugfs_entry_fops = {
163         .owner = THIS_MODULE,
164         .open = drm_debugfs_entry_open,
165         .read = seq_read,
166         .llseek = seq_lseek,
167         .release = single_release,
168 };
169
170 static const struct file_operations drm_debugfs_fops = {
171         .owner = THIS_MODULE,
172         .open = drm_debugfs_open,
173         .read = seq_read,
174         .llseek = seq_lseek,
175         .release = single_release,
176 };
177
178
179 /**
180  * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
181  *                      minor
182  * @files: The array of files to create
183  * @count: The number of files given
184  * @root: DRI debugfs dir entry.
185  * @minor: device minor number
186  *
187  * Create a given set of debugfs files represented by an array of
188  * &struct drm_info_list in the given root directory. These files will be removed
189  * automatically on drm_debugfs_cleanup().
190  */
191 void drm_debugfs_create_files(const struct drm_info_list *files, int count,
192                               struct dentry *root, struct drm_minor *minor)
193 {
194         struct drm_device *dev = minor->dev;
195         struct drm_info_node *tmp;
196         int i;
197
198         for (i = 0; i < count; i++) {
199                 u32 features = files[i].driver_features;
200
201                 if (features && !drm_core_check_all_features(dev, features))
202                         continue;
203
204                 tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
205                 if (tmp == NULL)
206                         continue;
207
208                 tmp->minor = minor;
209                 tmp->dent = debugfs_create_file(files[i].name,
210                                                 0444, root, tmp,
211                                                 &drm_debugfs_fops);
212                 tmp->info_ent = &files[i];
213
214                 mutex_lock(&minor->debugfs_lock);
215                 list_add(&tmp->list, &minor->debugfs_list);
216                 mutex_unlock(&minor->debugfs_lock);
217         }
218 }
219 EXPORT_SYMBOL(drm_debugfs_create_files);
220
221 int drm_debugfs_init(struct drm_minor *minor, int minor_id,
222                      struct dentry *root)
223 {
224         struct drm_device *dev = minor->dev;
225         struct drm_debugfs_entry *entry, *tmp;
226         char name[64];
227
228         INIT_LIST_HEAD(&minor->debugfs_list);
229         mutex_init(&minor->debugfs_lock);
230         sprintf(name, "%d", minor_id);
231         minor->debugfs_root = debugfs_create_dir(name, root);
232
233         drm_debugfs_add_files(minor->dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES);
234
235         if (drm_drv_uses_atomic_modeset(dev)) {
236                 drm_atomic_debugfs_init(minor);
237         }
238
239         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
240                 drm_framebuffer_debugfs_init(minor);
241
242                 drm_client_debugfs_init(minor);
243         }
244
245         if (dev->driver->debugfs_init)
246                 dev->driver->debugfs_init(minor);
247
248         list_for_each_entry_safe(entry, tmp, &dev->debugfs_list, list) {
249                 debugfs_create_file(entry->file.name, 0444,
250                                     minor->debugfs_root, entry, &drm_debugfs_entry_fops);
251                 list_del(&entry->list);
252         }
253
254         return 0;
255 }
256
257 void drm_debugfs_late_register(struct drm_device *dev)
258 {
259         struct drm_minor *minor = dev->primary;
260         struct drm_debugfs_entry *entry, *tmp;
261
262         if (!minor)
263                 return;
264
265         list_for_each_entry_safe(entry, tmp, &dev->debugfs_list, list) {
266                 debugfs_create_file(entry->file.name, 0444,
267                                     minor->debugfs_root, entry, &drm_debugfs_entry_fops);
268                 list_del(&entry->list);
269         }
270 }
271
272 int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
273                              struct drm_minor *minor)
274 {
275         struct list_head *pos, *q;
276         struct drm_info_node *tmp;
277         int i;
278
279         mutex_lock(&minor->debugfs_lock);
280         for (i = 0; i < count; i++) {
281                 list_for_each_safe(pos, q, &minor->debugfs_list) {
282                         tmp = list_entry(pos, struct drm_info_node, list);
283                         if (tmp->info_ent == &files[i]) {
284                                 debugfs_remove(tmp->dent);
285                                 list_del(pos);
286                                 kfree(tmp);
287                         }
288                 }
289         }
290         mutex_unlock(&minor->debugfs_lock);
291         return 0;
292 }
293 EXPORT_SYMBOL(drm_debugfs_remove_files);
294
295 static void drm_debugfs_remove_all_files(struct drm_minor *minor)
296 {
297         struct drm_info_node *node, *tmp;
298
299         mutex_lock(&minor->debugfs_lock);
300         list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {
301                 debugfs_remove(node->dent);
302                 list_del(&node->list);
303                 kfree(node);
304         }
305         mutex_unlock(&minor->debugfs_lock);
306 }
307
308 void drm_debugfs_cleanup(struct drm_minor *minor)
309 {
310         if (!minor->debugfs_root)
311                 return;
312
313         drm_debugfs_remove_all_files(minor);
314
315         debugfs_remove_recursive(minor->debugfs_root);
316         minor->debugfs_root = NULL;
317 }
318
319 /**
320  * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list
321  * @dev: drm device for the ioctl
322  * @name: debugfs file name
323  * @show: show callback
324  * @data: driver-private data, should not be device-specific
325  *
326  * Add a given file entry to the DRM device debugfs file list to be created on
327  * drm_debugfs_init.
328  */
329 void drm_debugfs_add_file(struct drm_device *dev, const char *name,
330                           int (*show)(struct seq_file*, void*), void *data)
331 {
332         struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);
333
334         if (!entry)
335                 return;
336
337         entry->file.name = name;
338         entry->file.show = show;
339         entry->file.data = data;
340         entry->dev = dev;
341
342         mutex_lock(&dev->debugfs_mutex);
343         list_add(&entry->list, &dev->debugfs_list);
344         mutex_unlock(&dev->debugfs_mutex);
345 }
346 EXPORT_SYMBOL(drm_debugfs_add_file);
347
348 /**
349  * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list
350  * @dev: drm device for the ioctl
351  * @files: The array of files to create
352  * @count: The number of files given
353  *
354  * Add a given set of debugfs files represented by an array of
355  * &struct drm_debugfs_info in the DRM device debugfs file list.
356  */
357 void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count)
358 {
359         int i;
360
361         for (i = 0; i < count; i++)
362                 drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);
363 }
364 EXPORT_SYMBOL(drm_debugfs_add_files);
365
366 static int connector_show(struct seq_file *m, void *data)
367 {
368         struct drm_connector *connector = m->private;
369
370         seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
371
372         return 0;
373 }
374
375 static int connector_open(struct inode *inode, struct file *file)
376 {
377         struct drm_connector *dev = inode->i_private;
378
379         return single_open(file, connector_show, dev);
380 }
381
382 static ssize_t connector_write(struct file *file, const char __user *ubuf,
383                                size_t len, loff_t *offp)
384 {
385         struct seq_file *m = file->private_data;
386         struct drm_connector *connector = m->private;
387         char buf[12];
388
389         if (len > sizeof(buf) - 1)
390                 return -EINVAL;
391
392         if (copy_from_user(buf, ubuf, len))
393                 return -EFAULT;
394
395         buf[len] = '\0';
396
397         if (sysfs_streq(buf, "on"))
398                 connector->force = DRM_FORCE_ON;
399         else if (sysfs_streq(buf, "digital"))
400                 connector->force = DRM_FORCE_ON_DIGITAL;
401         else if (sysfs_streq(buf, "off"))
402                 connector->force = DRM_FORCE_OFF;
403         else if (sysfs_streq(buf, "unspecified"))
404                 connector->force = DRM_FORCE_UNSPECIFIED;
405         else
406                 return -EINVAL;
407
408         return len;
409 }
410
411 static int edid_show(struct seq_file *m, void *data)
412 {
413         return drm_edid_override_show(m->private, m);
414 }
415
416 static int edid_open(struct inode *inode, struct file *file)
417 {
418         struct drm_connector *dev = inode->i_private;
419
420         return single_open(file, edid_show, dev);
421 }
422
423 static ssize_t edid_write(struct file *file, const char __user *ubuf,
424                           size_t len, loff_t *offp)
425 {
426         struct seq_file *m = file->private_data;
427         struct drm_connector *connector = m->private;
428         char *buf;
429         int ret;
430
431         buf = memdup_user(ubuf, len);
432         if (IS_ERR(buf))
433                 return PTR_ERR(buf);
434
435         if (len == 5 && !strncmp(buf, "reset", 5))
436                 ret = drm_edid_override_reset(connector);
437         else
438                 ret = drm_edid_override_set(connector, buf, len);
439
440         kfree(buf);
441
442         return ret ? ret : len;
443 }
444
445 /*
446  * Returns the min and max vrr vfreq through the connector's debugfs file.
447  * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
448  */
449 static int vrr_range_show(struct seq_file *m, void *data)
450 {
451         struct drm_connector *connector = m->private;
452
453         if (connector->status != connector_status_connected)
454                 return -ENODEV;
455
456         seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);
457         seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);
458
459         return 0;
460 }
461 DEFINE_SHOW_ATTRIBUTE(vrr_range);
462
463 /*
464  * Returns Connector's max supported bpc through debugfs file.
465  * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
466  */
467 static int output_bpc_show(struct seq_file *m, void *data)
468 {
469         struct drm_connector *connector = m->private;
470
471         if (connector->status != connector_status_connected)
472                 return -ENODEV;
473
474         seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);
475
476         return 0;
477 }
478 DEFINE_SHOW_ATTRIBUTE(output_bpc);
479
480 static const struct file_operations drm_edid_fops = {
481         .owner = THIS_MODULE,
482         .open = edid_open,
483         .read = seq_read,
484         .llseek = seq_lseek,
485         .release = single_release,
486         .write = edid_write
487 };
488
489
490 static const struct file_operations drm_connector_fops = {
491         .owner = THIS_MODULE,
492         .open = connector_open,
493         .read = seq_read,
494         .llseek = seq_lseek,
495         .release = single_release,
496         .write = connector_write
497 };
498
499 void drm_debugfs_connector_add(struct drm_connector *connector)
500 {
501         struct drm_minor *minor = connector->dev->primary;
502         struct dentry *root;
503
504         if (!minor->debugfs_root)
505                 return;
506
507         root = debugfs_create_dir(connector->name, minor->debugfs_root);
508         connector->debugfs_entry = root;
509
510         /* force */
511         debugfs_create_file("force", 0644, root, connector,
512                             &drm_connector_fops);
513
514         /* edid */
515         debugfs_create_file("edid_override", 0644, root, connector,
516                             &drm_edid_fops);
517
518         /* vrr range */
519         debugfs_create_file("vrr_range", 0444, root, connector,
520                             &vrr_range_fops);
521
522         /* max bpc */
523         debugfs_create_file("output_bpc", 0444, root, connector,
524                             &output_bpc_fops);
525
526         if (connector->funcs->debugfs_init)
527                 connector->funcs->debugfs_init(connector, root);
528 }
529
530 void drm_debugfs_connector_remove(struct drm_connector *connector)
531 {
532         if (!connector->debugfs_entry)
533                 return;
534
535         debugfs_remove_recursive(connector->debugfs_entry);
536
537         connector->debugfs_entry = NULL;
538 }
539
540 void drm_debugfs_crtc_add(struct drm_crtc *crtc)
541 {
542         struct drm_minor *minor = crtc->dev->primary;
543         struct dentry *root;
544         char *name;
545
546         name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
547         if (!name)
548                 return;
549
550         root = debugfs_create_dir(name, minor->debugfs_root);
551         kfree(name);
552
553         crtc->debugfs_entry = root;
554
555         drm_debugfs_crtc_crc_add(crtc);
556 }
557
558 void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
559 {
560         debugfs_remove_recursive(crtc->debugfs_entry);
561         crtc->debugfs_entry = NULL;
562 }
563
564 #endif /* CONFIG_DEBUG_FS */