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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_debugfs.h>
36#include <drm/drm_device.h>
37#include <drm/drm_drv.h>
38#include <drm/drm_edid.h>
39#include <drm/drm_file.h>
40#include <drm/drm_gem.h>
41#include <drm/drm_managed.h>
42#include <drm/drm_gpuvm.h>
43
44#include "drm_crtc_internal.h"
45#include "drm_internal.h"
46
47/***************************************************
48 * Initialization, etc.
49 **************************************************/
50
51static int drm_name_info(struct seq_file *m, void *data)
52{
53 struct drm_debugfs_entry *entry = m->private;
54 struct drm_device *dev = entry->dev;
55 struct drm_master *master;
56
57 mutex_lock(&dev->master_mutex);
58 master = dev->master;
59 seq_printf(m, "%s", dev->driver->name);
60 if (dev->dev)
61 seq_printf(m, " dev=%s", dev_name(dev->dev));
62 if (master && master->unique)
63 seq_printf(m, " master=%s", master->unique);
64 if (dev->unique)
65 seq_printf(m, " unique=%s", dev->unique);
66 seq_printf(m, "\n");
67 mutex_unlock(&dev->master_mutex);
68
69 return 0;
70}
71
72static int drm_clients_info(struct seq_file *m, void *data)
73{
74 struct drm_debugfs_entry *entry = m->private;
75 struct drm_device *dev = entry->dev;
76 struct drm_file *priv;
77 kuid_t uid;
78
79 seq_printf(m,
80 "%20s %5s %3s master a %5s %10s %*s\n",
81 "command",
82 "tgid",
83 "dev",
84 "uid",
85 "magic",
86 DRM_CLIENT_NAME_MAX_LEN,
87 "name");
88
89 /* dev->filelist is sorted youngest first, but we want to present
90 * oldest first (i.e. kernel, servers, clients), so walk backwardss.
91 */
92 mutex_lock(&dev->filelist_mutex);
93 list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
94 bool is_current_master = drm_is_current_master(priv);
95 struct task_struct *task;
96 struct pid *pid;
97
98 mutex_lock(&priv->client_name_lock);
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 %*s\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 DRM_CLIENT_NAME_MAX_LEN,
112 priv->client_name ? priv->client_name : "<unset>");
113 rcu_read_unlock();
114 mutex_unlock(&priv->client_name_lock);
115 }
116 mutex_unlock(&dev->filelist_mutex);
117 return 0;
118}
119
120static int drm_gem_one_name_info(int id, void *ptr, void *data)
121{
122 struct drm_gem_object *obj = ptr;
123 struct seq_file *m = data;
124
125 seq_printf(m, "%6d %8zd %7d %8d\n",
126 obj->name, obj->size,
127 obj->handle_count,
128 kref_read(&obj->refcount));
129 return 0;
130}
131
132static int drm_gem_name_info(struct seq_file *m, void *data)
133{
134 struct drm_debugfs_entry *entry = m->private;
135 struct drm_device *dev = entry->dev;
136
137 seq_printf(m, " name size handles refcount\n");
138
139 mutex_lock(&dev->object_name_lock);
140 idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
141 mutex_unlock(&dev->object_name_lock);
142
143 return 0;
144}
145
146static const struct drm_debugfs_info drm_debugfs_list[] = {
147 {"name", drm_name_info, 0},
148 {"clients", drm_clients_info, 0},
149 {"gem_names", drm_gem_name_info, DRIVER_GEM},
150};
151#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
152
153
154static int drm_debugfs_open(struct inode *inode, struct file *file)
155{
156 struct drm_info_node *node = inode->i_private;
157
158 if (!device_is_registered(node->minor->kdev))
159 return -ENODEV;
160
161 return single_open(file, node->info_ent->show, node);
162}
163
164static int drm_debugfs_entry_open(struct inode *inode, struct file *file)
165{
166 struct drm_debugfs_entry *entry = inode->i_private;
167 struct drm_debugfs_info *node = &entry->file;
168 struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel;
169
170 if (!device_is_registered(minor->kdev))
171 return -ENODEV;
172
173 return single_open(file, node->show, entry);
174}
175
176static const struct file_operations drm_debugfs_entry_fops = {
177 .owner = THIS_MODULE,
178 .open = drm_debugfs_entry_open,
179 .read = seq_read,
180 .llseek = seq_lseek,
181 .release = single_release,
182};
183
184static const struct file_operations drm_debugfs_fops = {
185 .owner = THIS_MODULE,
186 .open = drm_debugfs_open,
187 .read = seq_read,
188 .llseek = seq_lseek,
189 .release = single_release,
190};
191
192/**
193 * drm_debugfs_gpuva_info - dump the given DRM GPU VA space
194 * @m: pointer to the &seq_file to write
195 * @gpuvm: the &drm_gpuvm representing the GPU VA space
196 *
197 * Dumps the GPU VA mappings of a given DRM GPU VA manager.
198 *
199 * For each DRM GPU VA space drivers should call this function from their
200 * &drm_info_list's show callback.
201 *
202 * Returns: 0 on success, -ENODEV if the &gpuvm is not initialized
203 */
204int drm_debugfs_gpuva_info(struct seq_file *m,
205 struct drm_gpuvm *gpuvm)
206{
207 struct drm_gpuva *va, *kva = &gpuvm->kernel_alloc_node;
208
209 if (!gpuvm->name)
210 return -ENODEV;
211
212 seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",
213 gpuvm->name, gpuvm->mm_start, gpuvm->mm_start + gpuvm->mm_range);
214 seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",
215 kva->va.addr, kva->va.addr + kva->va.range);
216 seq_puts(m, "\n");
217 seq_puts(m, " VAs | start | range | end | object | object offset\n");
218 seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");
219 drm_gpuvm_for_each_va(va, gpuvm) {
220 if (unlikely(va == kva))
221 continue;
222
223 seq_printf(m, " | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",
224 va->va.addr, va->va.range, va->va.addr + va->va.range,
225 (u64)(uintptr_t)va->gem.obj, va->gem.offset);
226 }
227
228 return 0;
229}
230EXPORT_SYMBOL(drm_debugfs_gpuva_info);
231
232/**
233 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
234 * minor
235 * @files: The array of files to create
236 * @count: The number of files given
237 * @root: DRI debugfs dir entry.
238 * @minor: device minor number
239 *
240 * Create a given set of debugfs files represented by an array of
241 * &struct drm_info_list in the given root directory. These files will be removed
242 * automatically on drm_debugfs_dev_fini().
243 */
244void drm_debugfs_create_files(const struct drm_info_list *files, int count,
245 struct dentry *root, struct drm_minor *minor)
246{
247 struct drm_device *dev = minor->dev;
248 struct drm_info_node *tmp;
249 int i;
250
251 for (i = 0; i < count; i++) {
252 u32 features = files[i].driver_features;
253
254 if (features && !drm_core_check_all_features(dev, features))
255 continue;
256
257 tmp = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL);
258 if (tmp == NULL)
259 continue;
260
261 tmp->minor = minor;
262 tmp->dent = debugfs_create_file(files[i].name,
263 0444, root, tmp,
264 &drm_debugfs_fops);
265 tmp->info_ent = &files[i];
266 }
267}
268EXPORT_SYMBOL(drm_debugfs_create_files);
269
270int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
271 struct dentry *root, struct drm_minor *minor)
272{
273 int i;
274
275 for (i = 0; i < count; i++) {
276 struct dentry *dent = debugfs_lookup(files[i].name, root);
277
278 if (!dent)
279 continue;
280
281 drmm_kfree(minor->dev, d_inode(dent)->i_private);
282 debugfs_remove(dent);
283 }
284 return 0;
285}
286EXPORT_SYMBOL(drm_debugfs_remove_files);
287
288/**
289 * drm_debugfs_dev_init - create debugfs directory for the device
290 * @dev: the device which we want to create the directory for
291 * @root: the parent directory depending on the device type
292 *
293 * Creates the debugfs directory for the device under the given root directory.
294 */
295void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root)
296{
297 dev->debugfs_root = debugfs_create_dir(dev->unique, root);
298}
299
300/**
301 * drm_debugfs_dev_fini - cleanup debugfs directory
302 * @dev: the device to cleanup the debugfs stuff
303 *
304 * Remove the debugfs directory, might be called multiple times.
305 */
306void drm_debugfs_dev_fini(struct drm_device *dev)
307{
308 debugfs_remove_recursive(dev->debugfs_root);
309 dev->debugfs_root = NULL;
310}
311
312void drm_debugfs_dev_register(struct drm_device *dev)
313{
314 drm_debugfs_add_files(dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES);
315
316 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
317 drm_framebuffer_debugfs_init(dev);
318 drm_client_debugfs_init(dev);
319 }
320 if (drm_drv_uses_atomic_modeset(dev))
321 drm_atomic_debugfs_init(dev);
322}
323
324int drm_debugfs_register(struct drm_minor *minor, int minor_id,
325 struct dentry *root)
326{
327 struct drm_device *dev = minor->dev;
328 char name[64];
329
330 sprintf(name, "%d", minor_id);
331 minor->debugfs_symlink = debugfs_create_symlink(name, root,
332 dev->unique);
333
334 /* TODO: Only for compatibility with drivers */
335 minor->debugfs_root = dev->debugfs_root;
336
337 if (dev->driver->debugfs_init && dev->render != minor)
338 dev->driver->debugfs_init(minor);
339
340 return 0;
341}
342
343void drm_debugfs_unregister(struct drm_minor *minor)
344{
345 debugfs_remove(minor->debugfs_symlink);
346 minor->debugfs_symlink = NULL;
347}
348
349/**
350 * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list
351 * @dev: drm device for the ioctl
352 * @name: debugfs file name
353 * @show: show callback
354 * @data: driver-private data, should not be device-specific
355 *
356 * Add a given file entry to the DRM device debugfs file list to be created on
357 * drm_debugfs_init.
358 */
359void drm_debugfs_add_file(struct drm_device *dev, const char *name,
360 int (*show)(struct seq_file*, void*), void *data)
361{
362 struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);
363
364 if (!entry)
365 return;
366
367 entry->file.name = name;
368 entry->file.show = show;
369 entry->file.data = data;
370 entry->dev = dev;
371
372 debugfs_create_file(name, 0444, dev->debugfs_root, entry,
373 &drm_debugfs_entry_fops);
374}
375EXPORT_SYMBOL(drm_debugfs_add_file);
376
377/**
378 * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list
379 * @dev: drm device for the ioctl
380 * @files: The array of files to create
381 * @count: The number of files given
382 *
383 * Add a given set of debugfs files represented by an array of
384 * &struct drm_debugfs_info in the DRM device debugfs file list.
385 */
386void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count)
387{
388 int i;
389
390 for (i = 0; i < count; i++)
391 drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);
392}
393EXPORT_SYMBOL(drm_debugfs_add_files);
394
395static int connector_show(struct seq_file *m, void *data)
396{
397 struct drm_connector *connector = m->private;
398
399 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
400
401 return 0;
402}
403
404static int connector_open(struct inode *inode, struct file *file)
405{
406 struct drm_connector *dev = inode->i_private;
407
408 return single_open(file, connector_show, dev);
409}
410
411static ssize_t connector_write(struct file *file, const char __user *ubuf,
412 size_t len, loff_t *offp)
413{
414 struct seq_file *m = file->private_data;
415 struct drm_connector *connector = m->private;
416 char buf[12];
417
418 if (len > sizeof(buf) - 1)
419 return -EINVAL;
420
421 if (copy_from_user(buf, ubuf, len))
422 return -EFAULT;
423
424 buf[len] = '\0';
425
426 if (sysfs_streq(buf, "on"))
427 connector->force = DRM_FORCE_ON;
428 else if (sysfs_streq(buf, "digital"))
429 connector->force = DRM_FORCE_ON_DIGITAL;
430 else if (sysfs_streq(buf, "off"))
431 connector->force = DRM_FORCE_OFF;
432 else if (sysfs_streq(buf, "unspecified"))
433 connector->force = DRM_FORCE_UNSPECIFIED;
434 else
435 return -EINVAL;
436
437 return len;
438}
439
440static int edid_show(struct seq_file *m, void *data)
441{
442 return drm_edid_override_show(m->private, m);
443}
444
445static int edid_open(struct inode *inode, struct file *file)
446{
447 struct drm_connector *dev = inode->i_private;
448
449 return single_open(file, edid_show, dev);
450}
451
452static ssize_t edid_write(struct file *file, const char __user *ubuf,
453 size_t len, loff_t *offp)
454{
455 struct seq_file *m = file->private_data;
456 struct drm_connector *connector = m->private;
457 char *buf;
458 int ret;
459
460 buf = memdup_user(ubuf, len);
461 if (IS_ERR(buf))
462 return PTR_ERR(buf);
463
464 if (len == 5 && !strncmp(buf, "reset", 5))
465 ret = drm_edid_override_reset(connector);
466 else
467 ret = drm_edid_override_set(connector, buf, len);
468
469 kfree(buf);
470
471 return ret ? ret : len;
472}
473
474/*
475 * Returns the min and max vrr vfreq through the connector's debugfs file.
476 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
477 */
478static int vrr_range_show(struct seq_file *m, void *data)
479{
480 struct drm_connector *connector = m->private;
481
482 if (connector->status != connector_status_connected)
483 return -ENODEV;
484
485 seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);
486 seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);
487
488 return 0;
489}
490DEFINE_SHOW_ATTRIBUTE(vrr_range);
491
492/*
493 * Returns Connector's max supported bpc through debugfs file.
494 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
495 */
496static int output_bpc_show(struct seq_file *m, void *data)
497{
498 struct drm_connector *connector = m->private;
499
500 if (connector->status != connector_status_connected)
501 return -ENODEV;
502
503 seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);
504
505 return 0;
506}
507DEFINE_SHOW_ATTRIBUTE(output_bpc);
508
509static const struct file_operations drm_edid_fops = {
510 .owner = THIS_MODULE,
511 .open = edid_open,
512 .read = seq_read,
513 .llseek = seq_lseek,
514 .release = single_release,
515 .write = edid_write
516};
517
518
519static const struct file_operations drm_connector_fops = {
520 .owner = THIS_MODULE,
521 .open = connector_open,
522 .read = seq_read,
523 .llseek = seq_lseek,
524 .release = single_release,
525 .write = connector_write
526};
527
528static ssize_t
529audio_infoframe_read(struct file *filp, char __user *ubuf, size_t count, loff_t *ppos)
530{
531 struct drm_connector_hdmi_infoframe *infoframe;
532 struct drm_connector *connector;
533 union hdmi_infoframe *frame;
534 u8 buf[HDMI_INFOFRAME_SIZE(AUDIO)];
535 ssize_t len = 0;
536
537 connector = filp->private_data;
538 mutex_lock(&connector->hdmi.infoframes.lock);
539
540 infoframe = &connector->hdmi.infoframes.audio;
541 if (!infoframe->set)
542 goto out;
543
544 frame = &infoframe->data;
545 len = hdmi_infoframe_pack(frame, buf, sizeof(buf));
546 if (len < 0)
547 goto out;
548
549 len = simple_read_from_buffer(ubuf, count, ppos, buf, len);
550
551out:
552 mutex_unlock(&connector->hdmi.infoframes.lock);
553 return len;
554}
555
556static const struct file_operations audio_infoframe_fops = {
557 .owner = THIS_MODULE,
558 .open = simple_open,
559 .read = audio_infoframe_read,
560};
561
562static int create_hdmi_audio_infoframe_file(struct drm_connector *connector,
563 struct dentry *parent)
564{
565 struct dentry *file;
566
567 file = debugfs_create_file("audio", 0400, parent, connector, &audio_infoframe_fops);
568 if (IS_ERR(file))
569 return PTR_ERR(file);
570
571 return 0;
572}
573
574#define DEFINE_INFOFRAME_FILE(_f) \
575static ssize_t _f##_read_infoframe(struct file *filp, \
576 char __user *ubuf, \
577 size_t count, \
578 loff_t *ppos) \
579{ \
580 struct drm_connector_hdmi_infoframe *infoframe; \
581 struct drm_connector_state *conn_state; \
582 struct drm_connector *connector; \
583 union hdmi_infoframe *frame; \
584 struct drm_device *dev; \
585 u8 buf[HDMI_INFOFRAME_SIZE(MAX)]; \
586 ssize_t len = 0; \
587 \
588 connector = filp->private_data; \
589 dev = connector->dev; \
590 \
591 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); \
592 \
593 conn_state = connector->state; \
594 infoframe = &conn_state->hdmi.infoframes._f; \
595 if (!infoframe->set) \
596 goto out; \
597 \
598 frame = &infoframe->data; \
599 len = hdmi_infoframe_pack(frame, buf, sizeof(buf)); \
600 if (len < 0) \
601 goto out; \
602 \
603 len = simple_read_from_buffer(ubuf, count, ppos, buf, len); \
604 \
605out: \
606 drm_modeset_unlock(&dev->mode_config.connection_mutex); \
607 return len; \
608} \
609\
610static const struct file_operations _f##_infoframe_fops = { \
611 .owner = THIS_MODULE, \
612 .open = simple_open, \
613 .read = _f##_read_infoframe, \
614}; \
615\
616static int create_hdmi_## _f ## _infoframe_file(struct drm_connector *connector, \
617 struct dentry *parent) \
618{ \
619 struct dentry *file; \
620 \
621 file = debugfs_create_file(#_f, 0400, parent, connector, &_f ## _infoframe_fops); \
622 if (IS_ERR(file)) \
623 return PTR_ERR(file); \
624 \
625 return 0; \
626}
627
628DEFINE_INFOFRAME_FILE(avi);
629DEFINE_INFOFRAME_FILE(hdmi);
630DEFINE_INFOFRAME_FILE(hdr_drm);
631DEFINE_INFOFRAME_FILE(spd);
632
633static int create_hdmi_infoframe_files(struct drm_connector *connector,
634 struct dentry *parent)
635{
636 int ret;
637
638 ret = create_hdmi_audio_infoframe_file(connector, parent);
639 if (ret)
640 return ret;
641
642 ret = create_hdmi_avi_infoframe_file(connector, parent);
643 if (ret)
644 return ret;
645
646 ret = create_hdmi_hdmi_infoframe_file(connector, parent);
647 if (ret)
648 return ret;
649
650 ret = create_hdmi_hdr_drm_infoframe_file(connector, parent);
651 if (ret)
652 return ret;
653
654 ret = create_hdmi_spd_infoframe_file(connector, parent);
655 if (ret)
656 return ret;
657
658 return 0;
659}
660
661static void hdmi_debugfs_add(struct drm_connector *connector)
662{
663 struct dentry *dir;
664
665 if (!(connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
666 connector->connector_type == DRM_MODE_CONNECTOR_HDMIB))
667 return;
668
669 dir = debugfs_create_dir("infoframes", connector->debugfs_entry);
670 if (IS_ERR(dir))
671 return;
672
673 create_hdmi_infoframe_files(connector, dir);
674}
675
676void drm_debugfs_connector_add(struct drm_connector *connector)
677{
678 struct drm_device *dev = connector->dev;
679 struct dentry *root;
680
681 if (!dev->debugfs_root)
682 return;
683
684 root = debugfs_create_dir(connector->name, dev->debugfs_root);
685 connector->debugfs_entry = root;
686
687 /* force */
688 debugfs_create_file("force", 0644, root, connector,
689 &drm_connector_fops);
690
691 /* edid */
692 debugfs_create_file("edid_override", 0644, root, connector,
693 &drm_edid_fops);
694
695 /* vrr range */
696 debugfs_create_file("vrr_range", 0444, root, connector,
697 &vrr_range_fops);
698
699 /* max bpc */
700 debugfs_create_file("output_bpc", 0444, root, connector,
701 &output_bpc_fops);
702
703 hdmi_debugfs_add(connector);
704
705 if (connector->funcs->debugfs_init)
706 connector->funcs->debugfs_init(connector, root);
707}
708
709void drm_debugfs_connector_remove(struct drm_connector *connector)
710{
711 if (!connector->debugfs_entry)
712 return;
713
714 debugfs_remove_recursive(connector->debugfs_entry);
715
716 connector->debugfs_entry = NULL;
717}
718
719void drm_debugfs_crtc_add(struct drm_crtc *crtc)
720{
721 struct drm_device *dev = crtc->dev;
722 struct dentry *root;
723 char *name;
724
725 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
726 if (!name)
727 return;
728
729 root = debugfs_create_dir(name, dev->debugfs_root);
730 kfree(name);
731
732 crtc->debugfs_entry = root;
733
734 drm_debugfs_crtc_crc_add(crtc);
735}
736
737void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
738{
739 debugfs_remove_recursive(crtc->debugfs_entry);
740 crtc->debugfs_entry = NULL;
741}
742
743static int bridges_show(struct seq_file *m, void *data)
744{
745 struct drm_encoder *encoder = m->private;
746 struct drm_printer p = drm_seq_file_printer(m);
747 struct drm_bridge *bridge;
748 unsigned int idx = 0;
749
750 drm_for_each_bridge_in_chain(encoder, bridge) {
751 drm_printf(&p, "bridge[%d]: %ps\n", idx++, bridge->funcs);
752 drm_printf(&p, "\ttype: [%d] %s\n",
753 bridge->type,
754 drm_get_connector_type_name(bridge->type));
755
756 if (bridge->of_node)
757 drm_printf(&p, "\tOF: %pOFfc\n", bridge->of_node);
758
759 drm_printf(&p, "\tops: [0x%x]", bridge->ops);
760 if (bridge->ops & DRM_BRIDGE_OP_DETECT)
761 drm_puts(&p, " detect");
762 if (bridge->ops & DRM_BRIDGE_OP_EDID)
763 drm_puts(&p, " edid");
764 if (bridge->ops & DRM_BRIDGE_OP_HPD)
765 drm_puts(&p, " hpd");
766 if (bridge->ops & DRM_BRIDGE_OP_MODES)
767 drm_puts(&p, " modes");
768 if (bridge->ops & DRM_BRIDGE_OP_HDMI)
769 drm_puts(&p, " hdmi");
770 drm_puts(&p, "\n");
771 }
772
773 return 0;
774}
775DEFINE_SHOW_ATTRIBUTE(bridges);
776
777void drm_debugfs_encoder_add(struct drm_encoder *encoder)
778{
779 struct drm_minor *minor = encoder->dev->primary;
780 struct dentry *root;
781 char *name;
782
783 name = kasprintf(GFP_KERNEL, "encoder-%d", encoder->index);
784 if (!name)
785 return;
786
787 root = debugfs_create_dir(name, minor->debugfs_root);
788 kfree(name);
789
790 encoder->debugfs_entry = root;
791
792 /* bridges list */
793 debugfs_create_file("bridges", 0444, root, encoder,
794 &bridges_fops);
795
796 if (encoder->funcs && encoder->funcs->debugfs_init)
797 encoder->funcs->debugfs_init(encoder, root);
798}
799
800void drm_debugfs_encoder_remove(struct drm_encoder *encoder)
801{
802 debugfs_remove_recursive(encoder->debugfs_entry);
803 encoder->debugfs_entry = NULL;
804}