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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_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 * Initialization, etc.
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 /* 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
113static 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
125static int drm_gem_name_info(struct seq_file *m, void *data)
126{
127 struct drm_info_node *node = (struct drm_info_node *) m->private;
128 struct drm_device *dev = node->minor->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
139static const struct drm_info_list 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
147static 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
155static const struct file_operations drm_debugfs_fops = {
156 .owner = THIS_MODULE,
157 .open = drm_debugfs_open,
158 .read = seq_read,
159 .llseek = seq_lseek,
160 .release = single_release,
161};
162
163
164/**
165 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
166 * minor
167 * @files: The array of files to create
168 * @count: The number of files given
169 * @root: DRI debugfs dir entry.
170 * @minor: device minor number
171 *
172 * Create a given set of debugfs files represented by an array of
173 * &struct drm_info_list in the given root directory. These files will be removed
174 * automatically on drm_debugfs_cleanup().
175 */
176void drm_debugfs_create_files(const struct drm_info_list *files, int count,
177 struct dentry *root, struct drm_minor *minor)
178{
179 struct drm_device *dev = minor->dev;
180 struct drm_info_node *tmp;
181 int i;
182
183 for (i = 0; i < count; i++) {
184 u32 features = files[i].driver_features;
185
186 if (features && !drm_core_check_all_features(dev, features))
187 continue;
188
189 tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
190 if (tmp == NULL)
191 continue;
192
193 tmp->minor = minor;
194 tmp->dent = debugfs_create_file(files[i].name,
195 S_IFREG | S_IRUGO, root, tmp,
196 &drm_debugfs_fops);
197 tmp->info_ent = &files[i];
198
199 mutex_lock(&minor->debugfs_lock);
200 list_add(&tmp->list, &minor->debugfs_list);
201 mutex_unlock(&minor->debugfs_lock);
202 }
203}
204EXPORT_SYMBOL(drm_debugfs_create_files);
205
206int drm_debugfs_init(struct drm_minor *minor, int minor_id,
207 struct dentry *root)
208{
209 struct drm_device *dev = minor->dev;
210 char name[64];
211
212 INIT_LIST_HEAD(&minor->debugfs_list);
213 mutex_init(&minor->debugfs_lock);
214 sprintf(name, "%d", minor_id);
215 minor->debugfs_root = debugfs_create_dir(name, root);
216
217 drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
218 minor->debugfs_root, minor);
219
220 if (drm_drv_uses_atomic_modeset(dev)) {
221 drm_atomic_debugfs_init(minor);
222 }
223
224 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
225 drm_framebuffer_debugfs_init(minor);
226
227 drm_client_debugfs_init(minor);
228 }
229
230 if (dev->driver->debugfs_init)
231 dev->driver->debugfs_init(minor);
232
233 return 0;
234}
235
236
237int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
238 struct drm_minor *minor)
239{
240 struct list_head *pos, *q;
241 struct drm_info_node *tmp;
242 int i;
243
244 mutex_lock(&minor->debugfs_lock);
245 for (i = 0; i < count; i++) {
246 list_for_each_safe(pos, q, &minor->debugfs_list) {
247 tmp = list_entry(pos, struct drm_info_node, list);
248 if (tmp->info_ent == &files[i]) {
249 debugfs_remove(tmp->dent);
250 list_del(pos);
251 kfree(tmp);
252 }
253 }
254 }
255 mutex_unlock(&minor->debugfs_lock);
256 return 0;
257}
258EXPORT_SYMBOL(drm_debugfs_remove_files);
259
260static void drm_debugfs_remove_all_files(struct drm_minor *minor)
261{
262 struct drm_info_node *node, *tmp;
263
264 mutex_lock(&minor->debugfs_lock);
265 list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {
266 debugfs_remove(node->dent);
267 list_del(&node->list);
268 kfree(node);
269 }
270 mutex_unlock(&minor->debugfs_lock);
271}
272
273void drm_debugfs_cleanup(struct drm_minor *minor)
274{
275 if (!minor->debugfs_root)
276 return;
277
278 drm_debugfs_remove_all_files(minor);
279
280 debugfs_remove_recursive(minor->debugfs_root);
281 minor->debugfs_root = NULL;
282}
283
284static int connector_show(struct seq_file *m, void *data)
285{
286 struct drm_connector *connector = m->private;
287
288 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
289
290 return 0;
291}
292
293static int connector_open(struct inode *inode, struct file *file)
294{
295 struct drm_connector *dev = inode->i_private;
296
297 return single_open(file, connector_show, dev);
298}
299
300static ssize_t connector_write(struct file *file, const char __user *ubuf,
301 size_t len, loff_t *offp)
302{
303 struct seq_file *m = file->private_data;
304 struct drm_connector *connector = m->private;
305 char buf[12];
306
307 if (len > sizeof(buf) - 1)
308 return -EINVAL;
309
310 if (copy_from_user(buf, ubuf, len))
311 return -EFAULT;
312
313 buf[len] = '\0';
314
315 if (sysfs_streq(buf, "on"))
316 connector->force = DRM_FORCE_ON;
317 else if (sysfs_streq(buf, "digital"))
318 connector->force = DRM_FORCE_ON_DIGITAL;
319 else if (sysfs_streq(buf, "off"))
320 connector->force = DRM_FORCE_OFF;
321 else if (sysfs_streq(buf, "unspecified"))
322 connector->force = DRM_FORCE_UNSPECIFIED;
323 else
324 return -EINVAL;
325
326 return len;
327}
328
329static int edid_show(struct seq_file *m, void *data)
330{
331 struct drm_connector *connector = m->private;
332 struct drm_property_blob *edid = connector->edid_blob_ptr;
333
334 if (connector->override_edid && edid)
335 seq_write(m, edid->data, edid->length);
336
337 return 0;
338}
339
340static int edid_open(struct inode *inode, struct file *file)
341{
342 struct drm_connector *dev = inode->i_private;
343
344 return single_open(file, edid_show, dev);
345}
346
347static ssize_t edid_write(struct file *file, const char __user *ubuf,
348 size_t len, loff_t *offp)
349{
350 struct seq_file *m = file->private_data;
351 struct drm_connector *connector = m->private;
352 char *buf;
353 struct edid *edid;
354 int ret;
355
356 buf = memdup_user(ubuf, len);
357 if (IS_ERR(buf))
358 return PTR_ERR(buf);
359
360 edid = (struct edid *) buf;
361
362 if (len == 5 && !strncmp(buf, "reset", 5)) {
363 connector->override_edid = false;
364 ret = drm_connector_update_edid_property(connector, NULL);
365 } else if (len < EDID_LENGTH ||
366 EDID_LENGTH * (1 + edid->extensions) > len)
367 ret = -EINVAL;
368 else {
369 connector->override_edid = false;
370 ret = drm_connector_update_edid_property(connector, edid);
371 if (!ret)
372 connector->override_edid = true;
373 }
374
375 kfree(buf);
376
377 return (ret) ? ret : len;
378}
379
380/*
381 * Returns the min and max vrr vfreq through the connector's debugfs file.
382 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
383 */
384static int vrr_range_show(struct seq_file *m, void *data)
385{
386 struct drm_connector *connector = m->private;
387
388 if (connector->status != connector_status_connected)
389 return -ENODEV;
390
391 seq_printf(m, "Min: %u\n", (u8)connector->display_info.monitor_range.min_vfreq);
392 seq_printf(m, "Max: %u\n", (u8)connector->display_info.monitor_range.max_vfreq);
393
394 return 0;
395}
396DEFINE_SHOW_ATTRIBUTE(vrr_range);
397
398static const struct file_operations drm_edid_fops = {
399 .owner = THIS_MODULE,
400 .open = edid_open,
401 .read = seq_read,
402 .llseek = seq_lseek,
403 .release = single_release,
404 .write = edid_write
405};
406
407
408static const struct file_operations drm_connector_fops = {
409 .owner = THIS_MODULE,
410 .open = connector_open,
411 .read = seq_read,
412 .llseek = seq_lseek,
413 .release = single_release,
414 .write = connector_write
415};
416
417void drm_debugfs_connector_add(struct drm_connector *connector)
418{
419 struct drm_minor *minor = connector->dev->primary;
420 struct dentry *root;
421
422 if (!minor->debugfs_root)
423 return;
424
425 root = debugfs_create_dir(connector->name, minor->debugfs_root);
426 connector->debugfs_entry = root;
427
428 /* force */
429 debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,
430 &drm_connector_fops);
431
432 /* edid */
433 debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector,
434 &drm_edid_fops);
435
436 /* vrr range */
437 debugfs_create_file("vrr_range", S_IRUGO, root, connector,
438 &vrr_range_fops);
439}
440
441void drm_debugfs_connector_remove(struct drm_connector *connector)
442{
443 if (!connector->debugfs_entry)
444 return;
445
446 debugfs_remove_recursive(connector->debugfs_entry);
447
448 connector->debugfs_entry = NULL;
449}
450
451void drm_debugfs_crtc_add(struct drm_crtc *crtc)
452{
453 struct drm_minor *minor = crtc->dev->primary;
454 struct dentry *root;
455 char *name;
456
457 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
458 if (!name)
459 return;
460
461 root = debugfs_create_dir(name, minor->debugfs_root);
462 kfree(name);
463
464 crtc->debugfs_entry = root;
465
466 drm_debugfs_crtc_crc_add(crtc);
467}
468
469void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
470{
471 debugfs_remove_recursive(crtc->debugfs_entry);
472 crtc->debugfs_entry = NULL;
473}
474
475#endif /* CONFIG_DEBUG_FS */