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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_bridge.h>
35#include <drm/drm_client.h>
36#include <drm/drm_debugfs.h>
37#include <drm/drm_device.h>
38#include <drm/drm_drv.h>
39#include <drm/drm_edid.h>
40#include <drm/drm_file.h>
41#include <drm/drm_gem.h>
42#include <drm/drm_managed.h>
43#include <drm/drm_gpuvm.h>
44
45#include "drm_crtc_internal.h"
46#include "drm_internal.h"
47
48#if defined(CONFIG_DEBUG_FS)
49
50/***************************************************
51 * Initialization, etc.
52 **************************************************/
53
54static int drm_name_info(struct seq_file *m, void *data)
55{
56 struct drm_debugfs_entry *entry = m->private;
57 struct drm_device *dev = entry->dev;
58 struct drm_master *master;
59
60 mutex_lock(&dev->master_mutex);
61 master = dev->master;
62 seq_printf(m, "%s", dev->driver->name);
63 if (dev->dev)
64 seq_printf(m, " dev=%s", dev_name(dev->dev));
65 if (master && master->unique)
66 seq_printf(m, " master=%s", master->unique);
67 if (dev->unique)
68 seq_printf(m, " unique=%s", dev->unique);
69 seq_printf(m, "\n");
70 mutex_unlock(&dev->master_mutex);
71
72 return 0;
73}
74
75static int drm_clients_info(struct seq_file *m, void *data)
76{
77 struct drm_debugfs_entry *entry = m->private;
78 struct drm_device *dev = entry->dev;
79 struct drm_file *priv;
80 kuid_t uid;
81
82 seq_printf(m,
83 "%20s %5s %3s master a %5s %10s\n",
84 "command",
85 "tgid",
86 "dev",
87 "uid",
88 "magic");
89
90 /* dev->filelist is sorted youngest first, but we want to present
91 * oldest first (i.e. kernel, servers, clients), so walk backwardss.
92 */
93 mutex_lock(&dev->filelist_mutex);
94 list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
95 bool is_current_master = drm_is_current_master(priv);
96 struct task_struct *task;
97 struct pid *pid;
98
99 rcu_read_lock(); /* Locks priv->pid and pid_task()->comm! */
100 pid = rcu_dereference(priv->pid);
101 task = pid_task(pid, PIDTYPE_TGID);
102 uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
103 seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n",
104 task ? task->comm : "<unknown>",
105 pid_vnr(pid),
106 priv->minor->index,
107 is_current_master ? 'y' : 'n',
108 priv->authenticated ? 'y' : 'n',
109 from_kuid_munged(seq_user_ns(m), uid),
110 priv->magic);
111 rcu_read_unlock();
112 }
113 mutex_unlock(&dev->filelist_mutex);
114 return 0;
115}
116
117static int drm_gem_one_name_info(int id, void *ptr, void *data)
118{
119 struct drm_gem_object *obj = ptr;
120 struct seq_file *m = data;
121
122 seq_printf(m, "%6d %8zd %7d %8d\n",
123 obj->name, obj->size,
124 obj->handle_count,
125 kref_read(&obj->refcount));
126 return 0;
127}
128
129static int drm_gem_name_info(struct seq_file *m, void *data)
130{
131 struct drm_debugfs_entry *entry = m->private;
132 struct drm_device *dev = entry->dev;
133
134 seq_printf(m, " name size handles refcount\n");
135
136 mutex_lock(&dev->object_name_lock);
137 idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
138 mutex_unlock(&dev->object_name_lock);
139
140 return 0;
141}
142
143static const struct drm_debugfs_info drm_debugfs_list[] = {
144 {"name", drm_name_info, 0},
145 {"clients", drm_clients_info, 0},
146 {"gem_names", drm_gem_name_info, DRIVER_GEM},
147};
148#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
149
150
151static int drm_debugfs_open(struct inode *inode, struct file *file)
152{
153 struct drm_info_node *node = inode->i_private;
154
155 if (!device_is_registered(node->minor->kdev))
156 return -ENODEV;
157
158 return single_open(file, node->info_ent->show, node);
159}
160
161static int drm_debugfs_entry_open(struct inode *inode, struct file *file)
162{
163 struct drm_debugfs_entry *entry = inode->i_private;
164 struct drm_debugfs_info *node = &entry->file;
165 struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel;
166
167 if (!device_is_registered(minor->kdev))
168 return -ENODEV;
169
170 return single_open(file, node->show, entry);
171}
172
173static const struct file_operations drm_debugfs_entry_fops = {
174 .owner = THIS_MODULE,
175 .open = drm_debugfs_entry_open,
176 .read = seq_read,
177 .llseek = seq_lseek,
178 .release = single_release,
179};
180
181static const struct file_operations drm_debugfs_fops = {
182 .owner = THIS_MODULE,
183 .open = drm_debugfs_open,
184 .read = seq_read,
185 .llseek = seq_lseek,
186 .release = single_release,
187};
188
189/**
190 * drm_debugfs_gpuva_info - dump the given DRM GPU VA space
191 * @m: pointer to the &seq_file to write
192 * @gpuvm: the &drm_gpuvm representing the GPU VA space
193 *
194 * Dumps the GPU VA mappings of a given DRM GPU VA manager.
195 *
196 * For each DRM GPU VA space drivers should call this function from their
197 * &drm_info_list's show callback.
198 *
199 * Returns: 0 on success, -ENODEV if the &gpuvm is not initialized
200 */
201int drm_debugfs_gpuva_info(struct seq_file *m,
202 struct drm_gpuvm *gpuvm)
203{
204 struct drm_gpuva *va, *kva = &gpuvm->kernel_alloc_node;
205
206 if (!gpuvm->name)
207 return -ENODEV;
208
209 seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",
210 gpuvm->name, gpuvm->mm_start, gpuvm->mm_start + gpuvm->mm_range);
211 seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",
212 kva->va.addr, kva->va.addr + kva->va.range);
213 seq_puts(m, "\n");
214 seq_puts(m, " VAs | start | range | end | object | object offset\n");
215 seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");
216 drm_gpuvm_for_each_va(va, gpuvm) {
217 if (unlikely(va == kva))
218 continue;
219
220 seq_printf(m, " | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",
221 va->va.addr, va->va.range, va->va.addr + va->va.range,
222 (u64)(uintptr_t)va->gem.obj, va->gem.offset);
223 }
224
225 return 0;
226}
227EXPORT_SYMBOL(drm_debugfs_gpuva_info);
228
229/**
230 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
231 * minor
232 * @files: The array of files to create
233 * @count: The number of files given
234 * @root: DRI debugfs dir entry.
235 * @minor: device minor number
236 *
237 * Create a given set of debugfs files represented by an array of
238 * &struct drm_info_list in the given root directory. These files will be removed
239 * automatically on drm_debugfs_dev_fini().
240 */
241void drm_debugfs_create_files(const struct drm_info_list *files, int count,
242 struct dentry *root, struct drm_minor *minor)
243{
244 struct drm_device *dev = minor->dev;
245 struct drm_info_node *tmp;
246 int i;
247
248 for (i = 0; i < count; i++) {
249 u32 features = files[i].driver_features;
250
251 if (features && !drm_core_check_all_features(dev, features))
252 continue;
253
254 tmp = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL);
255 if (tmp == NULL)
256 continue;
257
258 tmp->minor = minor;
259 tmp->dent = debugfs_create_file(files[i].name,
260 0444, root, tmp,
261 &drm_debugfs_fops);
262 tmp->info_ent = &files[i];
263 }
264}
265EXPORT_SYMBOL(drm_debugfs_create_files);
266
267int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
268 struct dentry *root, struct drm_minor *minor)
269{
270 int i;
271
272 for (i = 0; i < count; i++) {
273 struct dentry *dent = debugfs_lookup(files[i].name, root);
274
275 if (!dent)
276 continue;
277
278 drmm_kfree(minor->dev, d_inode(dent)->i_private);
279 debugfs_remove(dent);
280 }
281 return 0;
282}
283EXPORT_SYMBOL(drm_debugfs_remove_files);
284
285/**
286 * drm_debugfs_dev_init - create debugfs directory for the device
287 * @dev: the device which we want to create the directory for
288 * @root: the parent directory depending on the device type
289 *
290 * Creates the debugfs directory for the device under the given root directory.
291 */
292void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root)
293{
294 dev->debugfs_root = debugfs_create_dir(dev->unique, root);
295}
296
297/**
298 * drm_debugfs_dev_fini - cleanup debugfs directory
299 * @dev: the device to cleanup the debugfs stuff
300 *
301 * Remove the debugfs directory, might be called multiple times.
302 */
303void drm_debugfs_dev_fini(struct drm_device *dev)
304{
305 debugfs_remove_recursive(dev->debugfs_root);
306 dev->debugfs_root = NULL;
307}
308
309void drm_debugfs_dev_register(struct drm_device *dev)
310{
311 drm_debugfs_add_files(dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES);
312
313 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
314 drm_framebuffer_debugfs_init(dev);
315 drm_client_debugfs_init(dev);
316 }
317 if (drm_drv_uses_atomic_modeset(dev))
318 drm_atomic_debugfs_init(dev);
319}
320
321int drm_debugfs_register(struct drm_minor *minor, int minor_id,
322 struct dentry *root)
323{
324 struct drm_device *dev = minor->dev;
325 char name[64];
326
327 sprintf(name, "%d", minor_id);
328 minor->debugfs_symlink = debugfs_create_symlink(name, root,
329 dev->unique);
330
331 /* TODO: Only for compatibility with drivers */
332 minor->debugfs_root = dev->debugfs_root;
333
334 if (dev->driver->debugfs_init && dev->render != minor)
335 dev->driver->debugfs_init(minor);
336
337 return 0;
338}
339
340void drm_debugfs_unregister(struct drm_minor *minor)
341{
342 debugfs_remove(minor->debugfs_symlink);
343 minor->debugfs_symlink = NULL;
344}
345
346/**
347 * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list
348 * @dev: drm device for the ioctl
349 * @name: debugfs file name
350 * @show: show callback
351 * @data: driver-private data, should not be device-specific
352 *
353 * Add a given file entry to the DRM device debugfs file list to be created on
354 * drm_debugfs_init.
355 */
356void drm_debugfs_add_file(struct drm_device *dev, const char *name,
357 int (*show)(struct seq_file*, void*), void *data)
358{
359 struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);
360
361 if (!entry)
362 return;
363
364 entry->file.name = name;
365 entry->file.show = show;
366 entry->file.data = data;
367 entry->dev = dev;
368
369 debugfs_create_file(name, 0444, dev->debugfs_root, entry,
370 &drm_debugfs_entry_fops);
371}
372EXPORT_SYMBOL(drm_debugfs_add_file);
373
374/**
375 * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list
376 * @dev: drm device for the ioctl
377 * @files: The array of files to create
378 * @count: The number of files given
379 *
380 * Add a given set of debugfs files represented by an array of
381 * &struct drm_debugfs_info in the DRM device debugfs file list.
382 */
383void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count)
384{
385 int i;
386
387 for (i = 0; i < count; i++)
388 drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);
389}
390EXPORT_SYMBOL(drm_debugfs_add_files);
391
392static int connector_show(struct seq_file *m, void *data)
393{
394 struct drm_connector *connector = m->private;
395
396 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
397
398 return 0;
399}
400
401static int connector_open(struct inode *inode, struct file *file)
402{
403 struct drm_connector *dev = inode->i_private;
404
405 return single_open(file, connector_show, dev);
406}
407
408static ssize_t connector_write(struct file *file, const char __user *ubuf,
409 size_t len, loff_t *offp)
410{
411 struct seq_file *m = file->private_data;
412 struct drm_connector *connector = m->private;
413 char buf[12];
414
415 if (len > sizeof(buf) - 1)
416 return -EINVAL;
417
418 if (copy_from_user(buf, ubuf, len))
419 return -EFAULT;
420
421 buf[len] = '\0';
422
423 if (sysfs_streq(buf, "on"))
424 connector->force = DRM_FORCE_ON;
425 else if (sysfs_streq(buf, "digital"))
426 connector->force = DRM_FORCE_ON_DIGITAL;
427 else if (sysfs_streq(buf, "off"))
428 connector->force = DRM_FORCE_OFF;
429 else if (sysfs_streq(buf, "unspecified"))
430 connector->force = DRM_FORCE_UNSPECIFIED;
431 else
432 return -EINVAL;
433
434 return len;
435}
436
437static int edid_show(struct seq_file *m, void *data)
438{
439 return drm_edid_override_show(m->private, m);
440}
441
442static int edid_open(struct inode *inode, struct file *file)
443{
444 struct drm_connector *dev = inode->i_private;
445
446 return single_open(file, edid_show, dev);
447}
448
449static ssize_t edid_write(struct file *file, const char __user *ubuf,
450 size_t len, loff_t *offp)
451{
452 struct seq_file *m = file->private_data;
453 struct drm_connector *connector = m->private;
454 char *buf;
455 int ret;
456
457 buf = memdup_user(ubuf, len);
458 if (IS_ERR(buf))
459 return PTR_ERR(buf);
460
461 if (len == 5 && !strncmp(buf, "reset", 5))
462 ret = drm_edid_override_reset(connector);
463 else
464 ret = drm_edid_override_set(connector, buf, len);
465
466 kfree(buf);
467
468 return ret ? ret : len;
469}
470
471/*
472 * Returns the min and max vrr vfreq through the connector's debugfs file.
473 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
474 */
475static int vrr_range_show(struct seq_file *m, void *data)
476{
477 struct drm_connector *connector = m->private;
478
479 if (connector->status != connector_status_connected)
480 return -ENODEV;
481
482 seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);
483 seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);
484
485 return 0;
486}
487DEFINE_SHOW_ATTRIBUTE(vrr_range);
488
489/*
490 * Returns Connector's max supported bpc through debugfs file.
491 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
492 */
493static int output_bpc_show(struct seq_file *m, void *data)
494{
495 struct drm_connector *connector = m->private;
496
497 if (connector->status != connector_status_connected)
498 return -ENODEV;
499
500 seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);
501
502 return 0;
503}
504DEFINE_SHOW_ATTRIBUTE(output_bpc);
505
506static const struct file_operations drm_edid_fops = {
507 .owner = THIS_MODULE,
508 .open = edid_open,
509 .read = seq_read,
510 .llseek = seq_lseek,
511 .release = single_release,
512 .write = edid_write
513};
514
515
516static const struct file_operations drm_connector_fops = {
517 .owner = THIS_MODULE,
518 .open = connector_open,
519 .read = seq_read,
520 .llseek = seq_lseek,
521 .release = single_release,
522 .write = connector_write
523};
524
525void drm_debugfs_connector_add(struct drm_connector *connector)
526{
527 struct drm_device *dev = connector->dev;
528 struct dentry *root;
529
530 if (!dev->debugfs_root)
531 return;
532
533 root = debugfs_create_dir(connector->name, dev->debugfs_root);
534 connector->debugfs_entry = root;
535
536 /* force */
537 debugfs_create_file("force", 0644, root, connector,
538 &drm_connector_fops);
539
540 /* edid */
541 debugfs_create_file("edid_override", 0644, root, connector,
542 &drm_edid_fops);
543
544 /* vrr range */
545 debugfs_create_file("vrr_range", 0444, root, connector,
546 &vrr_range_fops);
547
548 /* max bpc */
549 debugfs_create_file("output_bpc", 0444, root, connector,
550 &output_bpc_fops);
551
552 if (connector->funcs->debugfs_init)
553 connector->funcs->debugfs_init(connector, root);
554}
555
556void drm_debugfs_connector_remove(struct drm_connector *connector)
557{
558 if (!connector->debugfs_entry)
559 return;
560
561 debugfs_remove_recursive(connector->debugfs_entry);
562
563 connector->debugfs_entry = NULL;
564}
565
566void drm_debugfs_crtc_add(struct drm_crtc *crtc)
567{
568 struct drm_device *dev = crtc->dev;
569 struct dentry *root;
570 char *name;
571
572 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
573 if (!name)
574 return;
575
576 root = debugfs_create_dir(name, dev->debugfs_root);
577 kfree(name);
578
579 crtc->debugfs_entry = root;
580
581 drm_debugfs_crtc_crc_add(crtc);
582}
583
584void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
585{
586 debugfs_remove_recursive(crtc->debugfs_entry);
587 crtc->debugfs_entry = NULL;
588}
589
590static int bridges_show(struct seq_file *m, void *data)
591{
592 struct drm_encoder *encoder = m->private;
593 struct drm_printer p = drm_seq_file_printer(m);
594 struct drm_bridge *bridge;
595 unsigned int idx = 0;
596
597 drm_for_each_bridge_in_chain(encoder, bridge) {
598 drm_printf(&p, "bridge[%d]: %ps\n", idx++, bridge->funcs);
599 drm_printf(&p, "\ttype: [%d] %s\n",
600 bridge->type,
601 drm_get_connector_type_name(bridge->type));
602#ifdef CONFIG_OF
603 if (bridge->of_node)
604 drm_printf(&p, "\tOF: %pOFfc\n", bridge->of_node);
605#endif
606 drm_printf(&p, "\tops: [0x%x]", bridge->ops);
607 if (bridge->ops & DRM_BRIDGE_OP_DETECT)
608 drm_puts(&p, " detect");
609 if (bridge->ops & DRM_BRIDGE_OP_EDID)
610 drm_puts(&p, " edid");
611 if (bridge->ops & DRM_BRIDGE_OP_HPD)
612 drm_puts(&p, " hpd");
613 if (bridge->ops & DRM_BRIDGE_OP_MODES)
614 drm_puts(&p, " modes");
615 drm_puts(&p, "\n");
616 }
617
618 return 0;
619}
620DEFINE_SHOW_ATTRIBUTE(bridges);
621
622void drm_debugfs_encoder_add(struct drm_encoder *encoder)
623{
624 struct drm_minor *minor = encoder->dev->primary;
625 struct dentry *root;
626 char *name;
627
628 name = kasprintf(GFP_KERNEL, "encoder-%d", encoder->index);
629 if (!name)
630 return;
631
632 root = debugfs_create_dir(name, minor->debugfs_root);
633 kfree(name);
634
635 encoder->debugfs_entry = root;
636
637 /* bridges list */
638 debugfs_create_file("bridges", 0444, root, encoder,
639 &bridges_fops);
640
641 if (encoder->funcs && encoder->funcs->debugfs_init)
642 encoder->funcs->debugfs_init(encoder, root);
643}
644
645void drm_debugfs_encoder_remove(struct drm_encoder *encoder)
646{
647 debugfs_remove_recursive(encoder->debugfs_entry);
648 encoder->debugfs_entry = NULL;
649}
650
651#endif /* CONFIG_DEBUG_FS */
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_bridge.h>
35#include <drm/drm_client.h>
36#include <drm/drm_debugfs.h>
37#include <drm/drm_device.h>
38#include <drm/drm_drv.h>
39#include <drm/drm_edid.h>
40#include <drm/drm_file.h>
41#include <drm/drm_gem.h>
42#include <drm/drm_managed.h>
43#include <drm/drm_gpuvm.h>
44
45#include "drm_crtc_internal.h"
46#include "drm_internal.h"
47
48/***************************************************
49 * Initialization, etc.
50 **************************************************/
51
52static 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
73static 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 "tgid",
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 bool is_current_master = drm_is_current_master(priv);
94 struct task_struct *task;
95 struct pid *pid;
96
97 rcu_read_lock(); /* Locks priv->pid and pid_task()->comm! */
98 pid = rcu_dereference(priv->pid);
99 task = pid_task(pid, PIDTYPE_TGID);
100 uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
101 seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n",
102 task ? task->comm : "<unknown>",
103 pid_vnr(pid),
104 priv->minor->index,
105 is_current_master ? 'y' : 'n',
106 priv->authenticated ? 'y' : 'n',
107 from_kuid_munged(seq_user_ns(m), uid),
108 priv->magic);
109 rcu_read_unlock();
110 }
111 mutex_unlock(&dev->filelist_mutex);
112 return 0;
113}
114
115static int drm_gem_one_name_info(int id, void *ptr, void *data)
116{
117 struct drm_gem_object *obj = ptr;
118 struct seq_file *m = data;
119
120 seq_printf(m, "%6d %8zd %7d %8d\n",
121 obj->name, obj->size,
122 obj->handle_count,
123 kref_read(&obj->refcount));
124 return 0;
125}
126
127static int drm_gem_name_info(struct seq_file *m, void *data)
128{
129 struct drm_debugfs_entry *entry = m->private;
130 struct drm_device *dev = entry->dev;
131
132 seq_printf(m, " name size handles refcount\n");
133
134 mutex_lock(&dev->object_name_lock);
135 idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
136 mutex_unlock(&dev->object_name_lock);
137
138 return 0;
139}
140
141static const struct drm_debugfs_info drm_debugfs_list[] = {
142 {"name", drm_name_info, 0},
143 {"clients", drm_clients_info, 0},
144 {"gem_names", drm_gem_name_info, DRIVER_GEM},
145};
146#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
147
148
149static int drm_debugfs_open(struct inode *inode, struct file *file)
150{
151 struct drm_info_node *node = inode->i_private;
152
153 if (!device_is_registered(node->minor->kdev))
154 return -ENODEV;
155
156 return single_open(file, node->info_ent->show, node);
157}
158
159static int drm_debugfs_entry_open(struct inode *inode, struct file *file)
160{
161 struct drm_debugfs_entry *entry = inode->i_private;
162 struct drm_debugfs_info *node = &entry->file;
163 struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel;
164
165 if (!device_is_registered(minor->kdev))
166 return -ENODEV;
167
168 return single_open(file, node->show, entry);
169}
170
171static const struct file_operations drm_debugfs_entry_fops = {
172 .owner = THIS_MODULE,
173 .open = drm_debugfs_entry_open,
174 .read = seq_read,
175 .llseek = seq_lseek,
176 .release = single_release,
177};
178
179static const struct file_operations drm_debugfs_fops = {
180 .owner = THIS_MODULE,
181 .open = drm_debugfs_open,
182 .read = seq_read,
183 .llseek = seq_lseek,
184 .release = single_release,
185};
186
187/**
188 * drm_debugfs_gpuva_info - dump the given DRM GPU VA space
189 * @m: pointer to the &seq_file to write
190 * @gpuvm: the &drm_gpuvm representing the GPU VA space
191 *
192 * Dumps the GPU VA mappings of a given DRM GPU VA manager.
193 *
194 * For each DRM GPU VA space drivers should call this function from their
195 * &drm_info_list's show callback.
196 *
197 * Returns: 0 on success, -ENODEV if the &gpuvm is not initialized
198 */
199int drm_debugfs_gpuva_info(struct seq_file *m,
200 struct drm_gpuvm *gpuvm)
201{
202 struct drm_gpuva *va, *kva = &gpuvm->kernel_alloc_node;
203
204 if (!gpuvm->name)
205 return -ENODEV;
206
207 seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",
208 gpuvm->name, gpuvm->mm_start, gpuvm->mm_start + gpuvm->mm_range);
209 seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",
210 kva->va.addr, kva->va.addr + kva->va.range);
211 seq_puts(m, "\n");
212 seq_puts(m, " VAs | start | range | end | object | object offset\n");
213 seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");
214 drm_gpuvm_for_each_va(va, gpuvm) {
215 if (unlikely(va == kva))
216 continue;
217
218 seq_printf(m, " | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",
219 va->va.addr, va->va.range, va->va.addr + va->va.range,
220 (u64)(uintptr_t)va->gem.obj, va->gem.offset);
221 }
222
223 return 0;
224}
225EXPORT_SYMBOL(drm_debugfs_gpuva_info);
226
227/**
228 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
229 * minor
230 * @files: The array of files to create
231 * @count: The number of files given
232 * @root: DRI debugfs dir entry.
233 * @minor: device minor number
234 *
235 * Create a given set of debugfs files represented by an array of
236 * &struct drm_info_list in the given root directory. These files will be removed
237 * automatically on drm_debugfs_dev_fini().
238 */
239void drm_debugfs_create_files(const struct drm_info_list *files, int count,
240 struct dentry *root, struct drm_minor *minor)
241{
242 struct drm_device *dev = minor->dev;
243 struct drm_info_node *tmp;
244 int i;
245
246 for (i = 0; i < count; i++) {
247 u32 features = files[i].driver_features;
248
249 if (features && !drm_core_check_all_features(dev, features))
250 continue;
251
252 tmp = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL);
253 if (tmp == NULL)
254 continue;
255
256 tmp->minor = minor;
257 tmp->dent = debugfs_create_file(files[i].name,
258 0444, root, tmp,
259 &drm_debugfs_fops);
260 tmp->info_ent = &files[i];
261 }
262}
263EXPORT_SYMBOL(drm_debugfs_create_files);
264
265int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
266 struct dentry *root, struct drm_minor *minor)
267{
268 int i;
269
270 for (i = 0; i < count; i++) {
271 struct dentry *dent = debugfs_lookup(files[i].name, root);
272
273 if (!dent)
274 continue;
275
276 drmm_kfree(minor->dev, d_inode(dent)->i_private);
277 debugfs_remove(dent);
278 }
279 return 0;
280}
281EXPORT_SYMBOL(drm_debugfs_remove_files);
282
283/**
284 * drm_debugfs_dev_init - create debugfs directory for the device
285 * @dev: the device which we want to create the directory for
286 * @root: the parent directory depending on the device type
287 *
288 * Creates the debugfs directory for the device under the given root directory.
289 */
290void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root)
291{
292 dev->debugfs_root = debugfs_create_dir(dev->unique, root);
293}
294
295/**
296 * drm_debugfs_dev_fini - cleanup debugfs directory
297 * @dev: the device to cleanup the debugfs stuff
298 *
299 * Remove the debugfs directory, might be called multiple times.
300 */
301void drm_debugfs_dev_fini(struct drm_device *dev)
302{
303 debugfs_remove_recursive(dev->debugfs_root);
304 dev->debugfs_root = NULL;
305}
306
307void drm_debugfs_dev_register(struct drm_device *dev)
308{
309 drm_debugfs_add_files(dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES);
310
311 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
312 drm_framebuffer_debugfs_init(dev);
313 drm_client_debugfs_init(dev);
314 }
315 if (drm_drv_uses_atomic_modeset(dev))
316 drm_atomic_debugfs_init(dev);
317}
318
319int drm_debugfs_register(struct drm_minor *minor, int minor_id,
320 struct dentry *root)
321{
322 struct drm_device *dev = minor->dev;
323 char name[64];
324
325 sprintf(name, "%d", minor_id);
326 minor->debugfs_symlink = debugfs_create_symlink(name, root,
327 dev->unique);
328
329 /* TODO: Only for compatibility with drivers */
330 minor->debugfs_root = dev->debugfs_root;
331
332 if (dev->driver->debugfs_init && dev->render != minor)
333 dev->driver->debugfs_init(minor);
334
335 return 0;
336}
337
338void drm_debugfs_unregister(struct drm_minor *minor)
339{
340 debugfs_remove(minor->debugfs_symlink);
341 minor->debugfs_symlink = NULL;
342}
343
344/**
345 * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list
346 * @dev: drm device for the ioctl
347 * @name: debugfs file name
348 * @show: show callback
349 * @data: driver-private data, should not be device-specific
350 *
351 * Add a given file entry to the DRM device debugfs file list to be created on
352 * drm_debugfs_init.
353 */
354void drm_debugfs_add_file(struct drm_device *dev, const char *name,
355 int (*show)(struct seq_file*, void*), void *data)
356{
357 struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);
358
359 if (!entry)
360 return;
361
362 entry->file.name = name;
363 entry->file.show = show;
364 entry->file.data = data;
365 entry->dev = dev;
366
367 debugfs_create_file(name, 0444, dev->debugfs_root, entry,
368 &drm_debugfs_entry_fops);
369}
370EXPORT_SYMBOL(drm_debugfs_add_file);
371
372/**
373 * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list
374 * @dev: drm device for the ioctl
375 * @files: The array of files to create
376 * @count: The number of files given
377 *
378 * Add a given set of debugfs files represented by an array of
379 * &struct drm_debugfs_info in the DRM device debugfs file list.
380 */
381void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count)
382{
383 int i;
384
385 for (i = 0; i < count; i++)
386 drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);
387}
388EXPORT_SYMBOL(drm_debugfs_add_files);
389
390static int connector_show(struct seq_file *m, void *data)
391{
392 struct drm_connector *connector = m->private;
393
394 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
395
396 return 0;
397}
398
399static int connector_open(struct inode *inode, struct file *file)
400{
401 struct drm_connector *dev = inode->i_private;
402
403 return single_open(file, connector_show, dev);
404}
405
406static ssize_t connector_write(struct file *file, const char __user *ubuf,
407 size_t len, loff_t *offp)
408{
409 struct seq_file *m = file->private_data;
410 struct drm_connector *connector = m->private;
411 char buf[12];
412
413 if (len > sizeof(buf) - 1)
414 return -EINVAL;
415
416 if (copy_from_user(buf, ubuf, len))
417 return -EFAULT;
418
419 buf[len] = '\0';
420
421 if (sysfs_streq(buf, "on"))
422 connector->force = DRM_FORCE_ON;
423 else if (sysfs_streq(buf, "digital"))
424 connector->force = DRM_FORCE_ON_DIGITAL;
425 else if (sysfs_streq(buf, "off"))
426 connector->force = DRM_FORCE_OFF;
427 else if (sysfs_streq(buf, "unspecified"))
428 connector->force = DRM_FORCE_UNSPECIFIED;
429 else
430 return -EINVAL;
431
432 return len;
433}
434
435static int edid_show(struct seq_file *m, void *data)
436{
437 return drm_edid_override_show(m->private, m);
438}
439
440static int edid_open(struct inode *inode, struct file *file)
441{
442 struct drm_connector *dev = inode->i_private;
443
444 return single_open(file, edid_show, dev);
445}
446
447static ssize_t edid_write(struct file *file, const char __user *ubuf,
448 size_t len, loff_t *offp)
449{
450 struct seq_file *m = file->private_data;
451 struct drm_connector *connector = m->private;
452 char *buf;
453 int ret;
454
455 buf = memdup_user(ubuf, len);
456 if (IS_ERR(buf))
457 return PTR_ERR(buf);
458
459 if (len == 5 && !strncmp(buf, "reset", 5))
460 ret = drm_edid_override_reset(connector);
461 else
462 ret = drm_edid_override_set(connector, buf, len);
463
464 kfree(buf);
465
466 return ret ? ret : len;
467}
468
469/*
470 * Returns the min and max vrr vfreq through the connector's debugfs file.
471 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
472 */
473static int vrr_range_show(struct seq_file *m, void *data)
474{
475 struct drm_connector *connector = m->private;
476
477 if (connector->status != connector_status_connected)
478 return -ENODEV;
479
480 seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);
481 seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);
482
483 return 0;
484}
485DEFINE_SHOW_ATTRIBUTE(vrr_range);
486
487/*
488 * Returns Connector's max supported bpc through debugfs file.
489 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
490 */
491static int output_bpc_show(struct seq_file *m, void *data)
492{
493 struct drm_connector *connector = m->private;
494
495 if (connector->status != connector_status_connected)
496 return -ENODEV;
497
498 seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);
499
500 return 0;
501}
502DEFINE_SHOW_ATTRIBUTE(output_bpc);
503
504static const struct file_operations drm_edid_fops = {
505 .owner = THIS_MODULE,
506 .open = edid_open,
507 .read = seq_read,
508 .llseek = seq_lseek,
509 .release = single_release,
510 .write = edid_write
511};
512
513
514static const struct file_operations drm_connector_fops = {
515 .owner = THIS_MODULE,
516 .open = connector_open,
517 .read = seq_read,
518 .llseek = seq_lseek,
519 .release = single_release,
520 .write = connector_write
521};
522
523void drm_debugfs_connector_add(struct drm_connector *connector)
524{
525 struct drm_device *dev = connector->dev;
526 struct dentry *root;
527
528 if (!dev->debugfs_root)
529 return;
530
531 root = debugfs_create_dir(connector->name, dev->debugfs_root);
532 connector->debugfs_entry = root;
533
534 /* force */
535 debugfs_create_file("force", 0644, root, connector,
536 &drm_connector_fops);
537
538 /* edid */
539 debugfs_create_file("edid_override", 0644, root, connector,
540 &drm_edid_fops);
541
542 /* vrr range */
543 debugfs_create_file("vrr_range", 0444, root, connector,
544 &vrr_range_fops);
545
546 /* max bpc */
547 debugfs_create_file("output_bpc", 0444, root, connector,
548 &output_bpc_fops);
549
550 if (connector->funcs->debugfs_init)
551 connector->funcs->debugfs_init(connector, root);
552}
553
554void drm_debugfs_connector_remove(struct drm_connector *connector)
555{
556 if (!connector->debugfs_entry)
557 return;
558
559 debugfs_remove_recursive(connector->debugfs_entry);
560
561 connector->debugfs_entry = NULL;
562}
563
564void drm_debugfs_crtc_add(struct drm_crtc *crtc)
565{
566 struct drm_device *dev = crtc->dev;
567 struct dentry *root;
568 char *name;
569
570 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
571 if (!name)
572 return;
573
574 root = debugfs_create_dir(name, dev->debugfs_root);
575 kfree(name);
576
577 crtc->debugfs_entry = root;
578
579 drm_debugfs_crtc_crc_add(crtc);
580}
581
582void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
583{
584 debugfs_remove_recursive(crtc->debugfs_entry);
585 crtc->debugfs_entry = NULL;
586}
587
588static int bridges_show(struct seq_file *m, void *data)
589{
590 struct drm_encoder *encoder = m->private;
591 struct drm_printer p = drm_seq_file_printer(m);
592 struct drm_bridge *bridge;
593 unsigned int idx = 0;
594
595 drm_for_each_bridge_in_chain(encoder, bridge) {
596 drm_printf(&p, "bridge[%d]: %ps\n", idx++, bridge->funcs);
597 drm_printf(&p, "\ttype: [%d] %s\n",
598 bridge->type,
599 drm_get_connector_type_name(bridge->type));
600#ifdef CONFIG_OF
601 if (bridge->of_node)
602 drm_printf(&p, "\tOF: %pOFfc\n", bridge->of_node);
603#endif
604 drm_printf(&p, "\tops: [0x%x]", bridge->ops);
605 if (bridge->ops & DRM_BRIDGE_OP_DETECT)
606 drm_puts(&p, " detect");
607 if (bridge->ops & DRM_BRIDGE_OP_EDID)
608 drm_puts(&p, " edid");
609 if (bridge->ops & DRM_BRIDGE_OP_HPD)
610 drm_puts(&p, " hpd");
611 if (bridge->ops & DRM_BRIDGE_OP_MODES)
612 drm_puts(&p, " modes");
613 drm_puts(&p, "\n");
614 }
615
616 return 0;
617}
618DEFINE_SHOW_ATTRIBUTE(bridges);
619
620void drm_debugfs_encoder_add(struct drm_encoder *encoder)
621{
622 struct drm_minor *minor = encoder->dev->primary;
623 struct dentry *root;
624 char *name;
625
626 name = kasprintf(GFP_KERNEL, "encoder-%d", encoder->index);
627 if (!name)
628 return;
629
630 root = debugfs_create_dir(name, minor->debugfs_root);
631 kfree(name);
632
633 encoder->debugfs_entry = root;
634
635 /* bridges list */
636 debugfs_create_file("bridges", 0444, root, encoder,
637 &bridges_fops);
638
639 if (encoder->funcs && encoder->funcs->debugfs_init)
640 encoder->funcs->debugfs_init(encoder, root);
641}
642
643void drm_debugfs_encoder_remove(struct drm_encoder *encoder)
644{
645 debugfs_remove_recursive(encoder->debugfs_entry);
646 encoder->debugfs_entry = NULL;
647}