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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
42#include "drm_crtc_internal.h"
43#include "drm_internal.h"
44
45#if defined(CONFIG_DEBUG_FS)
46
47
48
49
50
51static int drm_name_info(struct seq_file *m, void *data)
52{
53 struct drm_info_node *node = (struct drm_info_node *) m->private;
54 struct drm_minor *minor = node->minor;
55 struct drm_device *dev = minor->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
73static int drm_clients_info(struct seq_file *m, void *data)
74{
75 struct drm_info_node *node = (struct drm_info_node *) m->private;
76 struct drm_device *dev = node->minor->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
89
90
91 mutex_lock(&dev->filelist_mutex);
92 list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
93 struct task_struct *task;
94
95 rcu_read_lock();
96 task = pid_task(priv->pid, PIDTYPE_PID);
97 uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
98 seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n",
99 task ? task->comm : "<unknown>",
100 pid_vnr(priv->pid),
101 priv->minor->index,
102 drm_is_current_master(priv) ? 'y' : 'n',
103 priv->authenticated ? 'y' : 'n',
104 from_kuid_munged(seq_user_ns(m), uid),
105 priv->magic);
106 rcu_read_unlock();
107 }
108 mutex_unlock(&dev->filelist_mutex);
109 return 0;
110}
111
112static int drm_gem_one_name_info(int id, void *ptr, void *data)
113{
114 struct drm_gem_object *obj = ptr;
115 struct seq_file *m = data;
116
117 seq_printf(m, "%6d %8zd %7d %8d\n",
118 obj->name, obj->size,
119 obj->handle_count,
120 kref_read(&obj->refcount));
121 return 0;
122}
123
124static int drm_gem_name_info(struct seq_file *m, void *data)
125{
126 struct drm_info_node *node = (struct drm_info_node *) m->private;
127 struct drm_device *dev = node->minor->dev;
128
129 seq_printf(m, " name size handles refcount\n");
130
131 mutex_lock(&dev->object_name_lock);
132 idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
133 mutex_unlock(&dev->object_name_lock);
134
135 return 0;
136}
137
138static const struct drm_info_list drm_debugfs_list[] = {
139 {"name", drm_name_info, 0},
140 {"clients", drm_clients_info, 0},
141 {"gem_names", drm_gem_name_info, DRIVER_GEM},
142};
143#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
144
145
146static int drm_debugfs_open(struct inode *inode, struct file *file)
147{
148 struct drm_info_node *node = inode->i_private;
149
150 return single_open(file, node->info_ent->show, node);
151}
152
153
154static const struct file_operations drm_debugfs_fops = {
155 .owner = THIS_MODULE,
156 .open = drm_debugfs_open,
157 .read = seq_read,
158 .llseek = seq_lseek,
159 .release = single_release,
160};
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175void drm_debugfs_create_files(const struct drm_info_list *files, int count,
176 struct dentry *root, struct drm_minor *minor)
177{
178 struct drm_device *dev = minor->dev;
179 struct drm_info_node *tmp;
180 int i;
181
182 for (i = 0; i < count; i++) {
183 u32 features = files[i].driver_features;
184
185 if (features && !drm_core_check_all_features(dev, features))
186 continue;
187
188 tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
189 if (tmp == NULL)
190 continue;
191
192 tmp->minor = minor;
193 tmp->dent = debugfs_create_file(files[i].name,
194 S_IFREG | S_IRUGO, root, tmp,
195 &drm_debugfs_fops);
196 tmp->info_ent = &files[i];
197
198 mutex_lock(&minor->debugfs_lock);
199 list_add(&tmp->list, &minor->debugfs_list);
200 mutex_unlock(&minor->debugfs_lock);
201 }
202}
203EXPORT_SYMBOL(drm_debugfs_create_files);
204
205int drm_debugfs_init(struct drm_minor *minor, int minor_id,
206 struct dentry *root)
207{
208 struct drm_device *dev = minor->dev;
209 char name[64];
210
211 INIT_LIST_HEAD(&minor->debugfs_list);
212 mutex_init(&minor->debugfs_lock);
213 sprintf(name, "%d", minor_id);
214 minor->debugfs_root = debugfs_create_dir(name, root);
215
216 drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
217 minor->debugfs_root, minor);
218
219 if (drm_drv_uses_atomic_modeset(dev)) {
220 drm_atomic_debugfs_init(minor);
221 }
222
223 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
224 drm_framebuffer_debugfs_init(minor);
225
226 drm_client_debugfs_init(minor);
227 }
228
229 if (dev->driver->debugfs_init)
230 dev->driver->debugfs_init(minor);
231
232 return 0;
233}
234
235
236int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
237 struct drm_minor *minor)
238{
239 struct list_head *pos, *q;
240 struct drm_info_node *tmp;
241 int i;
242
243 mutex_lock(&minor->debugfs_lock);
244 for (i = 0; i < count; i++) {
245 list_for_each_safe(pos, q, &minor->debugfs_list) {
246 tmp = list_entry(pos, struct drm_info_node, list);
247 if (tmp->info_ent == &files[i]) {
248 debugfs_remove(tmp->dent);
249 list_del(pos);
250 kfree(tmp);
251 }
252 }
253 }
254 mutex_unlock(&minor->debugfs_lock);
255 return 0;
256}
257EXPORT_SYMBOL(drm_debugfs_remove_files);
258
259static void drm_debugfs_remove_all_files(struct drm_minor *minor)
260{
261 struct drm_info_node *node, *tmp;
262
263 mutex_lock(&minor->debugfs_lock);
264 list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {
265 debugfs_remove(node->dent);
266 list_del(&node->list);
267 kfree(node);
268 }
269 mutex_unlock(&minor->debugfs_lock);
270}
271
272void drm_debugfs_cleanup(struct drm_minor *minor)
273{
274 if (!minor->debugfs_root)
275 return;
276
277 drm_debugfs_remove_all_files(minor);
278
279 debugfs_remove_recursive(minor->debugfs_root);
280 minor->debugfs_root = NULL;
281}
282
283static int connector_show(struct seq_file *m, void *data)
284{
285 struct drm_connector *connector = m->private;
286
287 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
288
289 return 0;
290}
291
292static int connector_open(struct inode *inode, struct file *file)
293{
294 struct drm_connector *dev = inode->i_private;
295
296 return single_open(file, connector_show, dev);
297}
298
299static ssize_t connector_write(struct file *file, const char __user *ubuf,
300 size_t len, loff_t *offp)
301{
302 struct seq_file *m = file->private_data;
303 struct drm_connector *connector = m->private;
304 char buf[12];
305
306 if (len > sizeof(buf) - 1)
307 return -EINVAL;
308
309 if (copy_from_user(buf, ubuf, len))
310 return -EFAULT;
311
312 buf[len] = '\0';
313
314 if (sysfs_streq(buf, "on"))
315 connector->force = DRM_FORCE_ON;
316 else if (sysfs_streq(buf, "digital"))
317 connector->force = DRM_FORCE_ON_DIGITAL;
318 else if (sysfs_streq(buf, "off"))
319 connector->force = DRM_FORCE_OFF;
320 else if (sysfs_streq(buf, "unspecified"))
321 connector->force = DRM_FORCE_UNSPECIFIED;
322 else
323 return -EINVAL;
324
325 return len;
326}
327
328static int edid_show(struct seq_file *m, void *data)
329{
330 struct drm_connector *connector = m->private;
331 struct drm_property_blob *edid = connector->edid_blob_ptr;
332
333 if (connector->override_edid && edid)
334 seq_write(m, edid->data, edid->length);
335
336 return 0;
337}
338
339static int edid_open(struct inode *inode, struct file *file)
340{
341 struct drm_connector *dev = inode->i_private;
342
343 return single_open(file, edid_show, dev);
344}
345
346static ssize_t edid_write(struct file *file, const char __user *ubuf,
347 size_t len, loff_t *offp)
348{
349 struct seq_file *m = file->private_data;
350 struct drm_connector *connector = m->private;
351 char *buf;
352 struct edid *edid;
353 int ret;
354
355 buf = memdup_user(ubuf, len);
356 if (IS_ERR(buf))
357 return PTR_ERR(buf);
358
359 edid = (struct edid *) buf;
360
361 if (len == 5 && !strncmp(buf, "reset", 5)) {
362 connector->override_edid = false;
363 ret = drm_connector_update_edid_property(connector, NULL);
364 } else if (len < EDID_LENGTH ||
365 EDID_LENGTH * (1 + edid->extensions) > len)
366 ret = -EINVAL;
367 else {
368 connector->override_edid = false;
369 ret = drm_connector_update_edid_property(connector, edid);
370 if (!ret)
371 connector->override_edid = true;
372 }
373
374 kfree(buf);
375
376 return (ret) ? ret : len;
377}
378
379
380
381
382
383static int vrr_range_show(struct seq_file *m, void *data)
384{
385 struct drm_connector *connector = m->private;
386
387 if (connector->status != connector_status_connected)
388 return -ENODEV;
389
390 seq_printf(m, "Min: %u\n", (u8)connector->display_info.monitor_range.min_vfreq);
391 seq_printf(m, "Max: %u\n", (u8)connector->display_info.monitor_range.max_vfreq);
392
393 return 0;
394}
395DEFINE_SHOW_ATTRIBUTE(vrr_range);
396
397static const struct file_operations drm_edid_fops = {
398 .owner = THIS_MODULE,
399 .open = edid_open,
400 .read = seq_read,
401 .llseek = seq_lseek,
402 .release = single_release,
403 .write = edid_write
404};
405
406
407static const struct file_operations drm_connector_fops = {
408 .owner = THIS_MODULE,
409 .open = connector_open,
410 .read = seq_read,
411 .llseek = seq_lseek,
412 .release = single_release,
413 .write = connector_write
414};
415
416void drm_debugfs_connector_add(struct drm_connector *connector)
417{
418 struct drm_minor *minor = connector->dev->primary;
419 struct dentry *root;
420
421 if (!minor->debugfs_root)
422 return;
423
424 root = debugfs_create_dir(connector->name, minor->debugfs_root);
425 connector->debugfs_entry = root;
426
427
428 debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,
429 &drm_connector_fops);
430
431
432 debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector,
433 &drm_edid_fops);
434
435
436 debugfs_create_file("vrr_range", S_IRUGO, root, connector,
437 &vrr_range_fops);
438}
439
440void drm_debugfs_connector_remove(struct drm_connector *connector)
441{
442 if (!connector->debugfs_entry)
443 return;
444
445 debugfs_remove_recursive(connector->debugfs_entry);
446
447 connector->debugfs_entry = NULL;
448}
449
450void drm_debugfs_crtc_add(struct drm_crtc *crtc)
451{
452 struct drm_minor *minor = crtc->dev->primary;
453 struct dentry *root;
454 char *name;
455
456 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
457 if (!name)
458 return;
459
460 root = debugfs_create_dir(name, minor->debugfs_root);
461 kfree(name);
462
463 crtc->debugfs_entry = root;
464
465 drm_debugfs_crtc_crc_add(crtc);
466}
467
468void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
469{
470 debugfs_remove_recursive(crtc->debugfs_entry);
471 crtc->debugfs_entry = NULL;
472}
473
474#endif
475