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 51 static 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 73 static 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 } 111 112 static 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 } 123 124 static 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 } 137 138 static 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) 144 145 146 static 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 } 152 153 154 static 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 */ 175 int 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 return 0; 203 } 204 EXPORT_SYMBOL(drm_debugfs_create_files); 205 206 int 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 int ret; 212 213 INIT_LIST_HEAD(&minor->debugfs_list); 214 mutex_init(&minor->debugfs_lock); 215 sprintf(name, "%d", minor_id); 216 minor->debugfs_root = debugfs_create_dir(name, root); 217 218 ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, 219 minor->debugfs_root, minor); 220 if (ret) { 221 debugfs_remove(minor->debugfs_root); 222 minor->debugfs_root = NULL; 223 DRM_ERROR("Failed to create core drm debugfs files\n"); 224 return ret; 225 } 226 227 if (drm_drv_uses_atomic_modeset(dev)) { 228 ret = drm_atomic_debugfs_init(minor); 229 if (ret) { 230 DRM_ERROR("Failed to create atomic debugfs files\n"); 231 return ret; 232 } 233 } 234 235 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 236 ret = drm_framebuffer_debugfs_init(minor); 237 if (ret) { 238 DRM_ERROR("Failed to create framebuffer debugfs file\n"); 239 return ret; 240 } 241 242 ret = drm_client_debugfs_init(minor); 243 if (ret) { 244 DRM_ERROR("Failed to create client debugfs file\n"); 245 return ret; 246 } 247 } 248 249 if (dev->driver->debugfs_init) { 250 ret = dev->driver->debugfs_init(minor); 251 if (ret) { 252 DRM_ERROR("DRM: Driver failed to initialize " 253 "/sys/kernel/debug/dri.\n"); 254 return ret; 255 } 256 } 257 return 0; 258 } 259 260 261 int drm_debugfs_remove_files(const struct drm_info_list *files, int count, 262 struct drm_minor *minor) 263 { 264 struct list_head *pos, *q; 265 struct drm_info_node *tmp; 266 int i; 267 268 mutex_lock(&minor->debugfs_lock); 269 for (i = 0; i < count; i++) { 270 list_for_each_safe(pos, q, &minor->debugfs_list) { 271 tmp = list_entry(pos, struct drm_info_node, list); 272 if (tmp->info_ent == &files[i]) { 273 debugfs_remove(tmp->dent); 274 list_del(pos); 275 kfree(tmp); 276 } 277 } 278 } 279 mutex_unlock(&minor->debugfs_lock); 280 return 0; 281 } 282 EXPORT_SYMBOL(drm_debugfs_remove_files); 283 284 static void drm_debugfs_remove_all_files(struct drm_minor *minor) 285 { 286 struct drm_info_node *node, *tmp; 287 288 mutex_lock(&minor->debugfs_lock); 289 list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) { 290 debugfs_remove(node->dent); 291 list_del(&node->list); 292 kfree(node); 293 } 294 mutex_unlock(&minor->debugfs_lock); 295 } 296 297 void drm_debugfs_cleanup(struct drm_minor *minor) 298 { 299 if (!minor->debugfs_root) 300 return; 301 302 drm_debugfs_remove_all_files(minor); 303 304 debugfs_remove_recursive(minor->debugfs_root); 305 minor->debugfs_root = NULL; 306 } 307 308 static int connector_show(struct seq_file *m, void *data) 309 { 310 struct drm_connector *connector = m->private; 311 312 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force)); 313 314 return 0; 315 } 316 317 static int connector_open(struct inode *inode, struct file *file) 318 { 319 struct drm_connector *dev = inode->i_private; 320 321 return single_open(file, connector_show, dev); 322 } 323 324 static ssize_t connector_write(struct file *file, const char __user *ubuf, 325 size_t len, loff_t *offp) 326 { 327 struct seq_file *m = file->private_data; 328 struct drm_connector *connector = m->private; 329 char buf[12]; 330 331 if (len > sizeof(buf) - 1) 332 return -EINVAL; 333 334 if (copy_from_user(buf, ubuf, len)) 335 return -EFAULT; 336 337 buf[len] = '\0'; 338 339 if (!strcmp(buf, "on")) 340 connector->force = DRM_FORCE_ON; 341 else if (!strcmp(buf, "digital")) 342 connector->force = DRM_FORCE_ON_DIGITAL; 343 else if (!strcmp(buf, "off")) 344 connector->force = DRM_FORCE_OFF; 345 else if (!strcmp(buf, "unspecified")) 346 connector->force = DRM_FORCE_UNSPECIFIED; 347 else 348 return -EINVAL; 349 350 return len; 351 } 352 353 static int edid_show(struct seq_file *m, void *data) 354 { 355 struct drm_connector *connector = m->private; 356 struct drm_property_blob *edid = connector->edid_blob_ptr; 357 358 if (connector->override_edid && edid) 359 seq_write(m, edid->data, edid->length); 360 361 return 0; 362 } 363 364 static int edid_open(struct inode *inode, struct file *file) 365 { 366 struct drm_connector *dev = inode->i_private; 367 368 return single_open(file, edid_show, dev); 369 } 370 371 static ssize_t edid_write(struct file *file, const char __user *ubuf, 372 size_t len, loff_t *offp) 373 { 374 struct seq_file *m = file->private_data; 375 struct drm_connector *connector = m->private; 376 char *buf; 377 struct edid *edid; 378 int ret; 379 380 buf = memdup_user(ubuf, len); 381 if (IS_ERR(buf)) 382 return PTR_ERR(buf); 383 384 edid = (struct edid *) buf; 385 386 if (len == 5 && !strncmp(buf, "reset", 5)) { 387 connector->override_edid = false; 388 ret = drm_connector_update_edid_property(connector, NULL); 389 } else if (len < EDID_LENGTH || 390 EDID_LENGTH * (1 + edid->extensions) > len) 391 ret = -EINVAL; 392 else { 393 connector->override_edid = false; 394 ret = drm_connector_update_edid_property(connector, edid); 395 if (!ret) 396 connector->override_edid = true; 397 } 398 399 kfree(buf); 400 401 return (ret) ? ret : len; 402 } 403 404 static const struct file_operations drm_edid_fops = { 405 .owner = THIS_MODULE, 406 .open = edid_open, 407 .read = seq_read, 408 .llseek = seq_lseek, 409 .release = single_release, 410 .write = edid_write 411 }; 412 413 414 static const struct file_operations drm_connector_fops = { 415 .owner = THIS_MODULE, 416 .open = connector_open, 417 .read = seq_read, 418 .llseek = seq_lseek, 419 .release = single_release, 420 .write = connector_write 421 }; 422 423 void drm_debugfs_connector_add(struct drm_connector *connector) 424 { 425 struct drm_minor *minor = connector->dev->primary; 426 struct dentry *root; 427 428 if (!minor->debugfs_root) 429 return; 430 431 root = debugfs_create_dir(connector->name, minor->debugfs_root); 432 connector->debugfs_entry = root; 433 434 /* force */ 435 debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector, 436 &drm_connector_fops); 437 438 /* edid */ 439 debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector, 440 &drm_edid_fops); 441 } 442 443 void drm_debugfs_connector_remove(struct drm_connector *connector) 444 { 445 if (!connector->debugfs_entry) 446 return; 447 448 debugfs_remove_recursive(connector->debugfs_entry); 449 450 connector->debugfs_entry = NULL; 451 } 452 453 void drm_debugfs_crtc_add(struct drm_crtc *crtc) 454 { 455 struct drm_minor *minor = crtc->dev->primary; 456 struct dentry *root; 457 char *name; 458 459 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index); 460 if (!name) 461 return; 462 463 root = debugfs_create_dir(name, minor->debugfs_root); 464 kfree(name); 465 466 crtc->debugfs_entry = root; 467 468 drm_debugfs_crtc_crc_add(crtc); 469 } 470 471 void drm_debugfs_crtc_remove(struct drm_crtc *crtc) 472 { 473 debugfs_remove_recursive(crtc->debugfs_entry); 474 crtc->debugfs_entry = NULL; 475 } 476 477 #endif /* CONFIG_DEBUG_FS */ 478