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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_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
95 rcu_read_lock(); /* locks pid_task()->comm */
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 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
165 * minor
166 * @files: The array of files to create
167 * @count: The number of files given
168 * @root: DRI debugfs dir entry.
169 * @minor: device minor number
170 *
171 * Create a given set of debugfs files represented by an array of
172 * &struct drm_info_list in the given root directory. These files will be removed
173 * automatically on drm_debugfs_cleanup().
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 * Returns the min and max vrr vfreq through the connector's debugfs file.
381 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
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 /* force */
428 debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,
429 &drm_connector_fops);
430
431 /* edid */
432 debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector,
433 &drm_edid_fops);
434
435 /* vrr range */
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 /* 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}