1 /* 2 * Copyright (c) 2016 Intel Corporation 3 * 4 * Permission to use, copy, modify, distribute, and sell this software and its 5 * documentation for any purpose is hereby granted without fee, provided that 6 * the above copyright notice appear in all copies and that both that copyright 7 * notice and this permission notice appear in supporting documentation, and 8 * that the name of the copyright holders not be used in advertising or 9 * publicity pertaining to distribution of the software without specific, 10 * written prior permission. The copyright holders make no representations 11 * about the suitability of this software for any purpose. It is provided "as 12 * is" without express or implied warranty. 13 * 14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 20 * OF THIS SOFTWARE. 21 */ 22 23 #include <drm/drm_encoder.h> 24 #include <drm/drm_mode_config.h> 25 #include <drm/drmP.h> 26 27 #include "drm_crtc_internal.h" 28 #include "drm_internal.h" 29 30 int drm_modeset_register_all(struct drm_device *dev) 31 { 32 int ret; 33 34 ret = drm_plane_register_all(dev); 35 if (ret) 36 goto err_plane; 37 38 ret = drm_crtc_register_all(dev); 39 if (ret) 40 goto err_crtc; 41 42 ret = drm_encoder_register_all(dev); 43 if (ret) 44 goto err_encoder; 45 46 ret = drm_connector_register_all(dev); 47 if (ret) 48 goto err_connector; 49 50 return 0; 51 52 err_connector: 53 drm_encoder_unregister_all(dev); 54 err_encoder: 55 drm_crtc_unregister_all(dev); 56 err_crtc: 57 drm_plane_unregister_all(dev); 58 err_plane: 59 return ret; 60 } 61 62 void drm_modeset_unregister_all(struct drm_device *dev) 63 { 64 drm_connector_unregister_all(dev); 65 drm_encoder_unregister_all(dev); 66 drm_crtc_unregister_all(dev); 67 drm_plane_unregister_all(dev); 68 } 69 70 /** 71 * drm_mode_getresources - get graphics configuration 72 * @dev: drm device for the ioctl 73 * @data: data pointer for the ioctl 74 * @file_priv: drm file for the ioctl call 75 * 76 * Construct a set of configuration description structures and return 77 * them to the user, including CRTC, connector and framebuffer configuration. 78 * 79 * Called by the user via ioctl. 80 * 81 * Returns: 82 * Zero on success, negative errno on failure. 83 */ 84 int drm_mode_getresources(struct drm_device *dev, void *data, 85 struct drm_file *file_priv) 86 { 87 struct drm_mode_card_res *card_res = data; 88 struct drm_framebuffer *fb; 89 struct drm_connector *connector; 90 struct drm_crtc *crtc; 91 struct drm_encoder *encoder; 92 int count, ret = 0; 93 uint32_t __user *fb_id; 94 uint32_t __user *crtc_id; 95 uint32_t __user *connector_id; 96 uint32_t __user *encoder_id; 97 struct drm_connector_list_iter conn_iter; 98 99 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 100 return -EOPNOTSUPP; 101 102 mutex_lock(&file_priv->fbs_lock); 103 count = 0; 104 fb_id = u64_to_user_ptr(card_res->fb_id_ptr); 105 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 106 if (count < card_res->count_fbs && 107 put_user(fb->base.id, fb_id + count)) { 108 mutex_unlock(&file_priv->fbs_lock); 109 return -EFAULT; 110 } 111 count++; 112 } 113 card_res->count_fbs = count; 114 mutex_unlock(&file_priv->fbs_lock); 115 116 card_res->max_height = dev->mode_config.max_height; 117 card_res->min_height = dev->mode_config.min_height; 118 card_res->max_width = dev->mode_config.max_width; 119 card_res->min_width = dev->mode_config.min_width; 120 121 count = 0; 122 crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr); 123 drm_for_each_crtc(crtc, dev) { 124 if (drm_lease_held(file_priv, crtc->base.id)) { 125 if (count < card_res->count_crtcs && 126 put_user(crtc->base.id, crtc_id + count)) 127 return -EFAULT; 128 count++; 129 } 130 } 131 card_res->count_crtcs = count; 132 133 count = 0; 134 encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr); 135 drm_for_each_encoder(encoder, dev) { 136 if (count < card_res->count_encoders && 137 put_user(encoder->base.id, encoder_id + count)) 138 return -EFAULT; 139 count++; 140 } 141 card_res->count_encoders = count; 142 143 drm_connector_list_iter_begin(dev, &conn_iter); 144 count = 0; 145 connector_id = u64_to_user_ptr(card_res->connector_id_ptr); 146 drm_for_each_connector_iter(connector, &conn_iter) { 147 /* only expose writeback connectors if userspace understands them */ 148 if (!file_priv->writeback_connectors && 149 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)) 150 continue; 151 152 if (drm_lease_held(file_priv, connector->base.id)) { 153 if (count < card_res->count_connectors && 154 put_user(connector->base.id, connector_id + count)) { 155 drm_connector_list_iter_end(&conn_iter); 156 return -EFAULT; 157 } 158 count++; 159 } 160 } 161 card_res->count_connectors = count; 162 drm_connector_list_iter_end(&conn_iter); 163 164 return ret; 165 } 166 167 /** 168 * drm_mode_config_reset - call ->reset callbacks 169 * @dev: drm device 170 * 171 * This functions calls all the crtc's, encoder's and connector's ->reset 172 * callback. Drivers can use this in e.g. their driver load or resume code to 173 * reset hardware and software state. 174 */ 175 void drm_mode_config_reset(struct drm_device *dev) 176 { 177 struct drm_crtc *crtc; 178 struct drm_plane *plane; 179 struct drm_encoder *encoder; 180 struct drm_connector *connector; 181 struct drm_connector_list_iter conn_iter; 182 183 drm_for_each_plane(plane, dev) 184 if (plane->funcs->reset) 185 plane->funcs->reset(plane); 186 187 drm_for_each_crtc(crtc, dev) 188 if (crtc->funcs->reset) 189 crtc->funcs->reset(crtc); 190 191 drm_for_each_encoder(encoder, dev) 192 if (encoder->funcs->reset) 193 encoder->funcs->reset(encoder); 194 195 drm_connector_list_iter_begin(dev, &conn_iter); 196 drm_for_each_connector_iter(connector, &conn_iter) 197 if (connector->funcs->reset) 198 connector->funcs->reset(connector); 199 drm_connector_list_iter_end(&conn_iter); 200 } 201 EXPORT_SYMBOL(drm_mode_config_reset); 202 203 /* 204 * Global properties 205 */ 206 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 207 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 208 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 209 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 210 }; 211 212 static int drm_mode_create_standard_properties(struct drm_device *dev) 213 { 214 struct drm_property *prop; 215 int ret; 216 217 ret = drm_connector_create_standard_properties(dev); 218 if (ret) 219 return ret; 220 221 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 222 "type", drm_plane_type_enum_list, 223 ARRAY_SIZE(drm_plane_type_enum_list)); 224 if (!prop) 225 return -ENOMEM; 226 dev->mode_config.plane_type_property = prop; 227 228 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 229 "SRC_X", 0, UINT_MAX); 230 if (!prop) 231 return -ENOMEM; 232 dev->mode_config.prop_src_x = prop; 233 234 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 235 "SRC_Y", 0, UINT_MAX); 236 if (!prop) 237 return -ENOMEM; 238 dev->mode_config.prop_src_y = prop; 239 240 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 241 "SRC_W", 0, UINT_MAX); 242 if (!prop) 243 return -ENOMEM; 244 dev->mode_config.prop_src_w = prop; 245 246 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 247 "SRC_H", 0, UINT_MAX); 248 if (!prop) 249 return -ENOMEM; 250 dev->mode_config.prop_src_h = prop; 251 252 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 253 "CRTC_X", INT_MIN, INT_MAX); 254 if (!prop) 255 return -ENOMEM; 256 dev->mode_config.prop_crtc_x = prop; 257 258 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 259 "CRTC_Y", INT_MIN, INT_MAX); 260 if (!prop) 261 return -ENOMEM; 262 dev->mode_config.prop_crtc_y = prop; 263 264 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 265 "CRTC_W", 0, INT_MAX); 266 if (!prop) 267 return -ENOMEM; 268 dev->mode_config.prop_crtc_w = prop; 269 270 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 271 "CRTC_H", 0, INT_MAX); 272 if (!prop) 273 return -ENOMEM; 274 dev->mode_config.prop_crtc_h = prop; 275 276 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 277 "FB_ID", DRM_MODE_OBJECT_FB); 278 if (!prop) 279 return -ENOMEM; 280 dev->mode_config.prop_fb_id = prop; 281 282 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 283 "IN_FENCE_FD", -1, INT_MAX); 284 if (!prop) 285 return -ENOMEM; 286 dev->mode_config.prop_in_fence_fd = prop; 287 288 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 289 "OUT_FENCE_PTR", 0, U64_MAX); 290 if (!prop) 291 return -ENOMEM; 292 dev->mode_config.prop_out_fence_ptr = prop; 293 294 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 295 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 296 if (!prop) 297 return -ENOMEM; 298 dev->mode_config.prop_crtc_id = prop; 299 300 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 301 "ACTIVE"); 302 if (!prop) 303 return -ENOMEM; 304 dev->mode_config.prop_active = prop; 305 306 prop = drm_property_create(dev, 307 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 308 "MODE_ID", 0); 309 if (!prop) 310 return -ENOMEM; 311 dev->mode_config.prop_mode_id = prop; 312 313 prop = drm_property_create(dev, 314 DRM_MODE_PROP_BLOB, 315 "DEGAMMA_LUT", 0); 316 if (!prop) 317 return -ENOMEM; 318 dev->mode_config.degamma_lut_property = prop; 319 320 prop = drm_property_create_range(dev, 321 DRM_MODE_PROP_IMMUTABLE, 322 "DEGAMMA_LUT_SIZE", 0, UINT_MAX); 323 if (!prop) 324 return -ENOMEM; 325 dev->mode_config.degamma_lut_size_property = prop; 326 327 prop = drm_property_create(dev, 328 DRM_MODE_PROP_BLOB, 329 "CTM", 0); 330 if (!prop) 331 return -ENOMEM; 332 dev->mode_config.ctm_property = prop; 333 334 prop = drm_property_create(dev, 335 DRM_MODE_PROP_BLOB, 336 "GAMMA_LUT", 0); 337 if (!prop) 338 return -ENOMEM; 339 dev->mode_config.gamma_lut_property = prop; 340 341 prop = drm_property_create_range(dev, 342 DRM_MODE_PROP_IMMUTABLE, 343 "GAMMA_LUT_SIZE", 0, UINT_MAX); 344 if (!prop) 345 return -ENOMEM; 346 dev->mode_config.gamma_lut_size_property = prop; 347 348 prop = drm_property_create(dev, 349 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 350 "IN_FORMATS", 0); 351 if (!prop) 352 return -ENOMEM; 353 dev->mode_config.modifiers_property = prop; 354 355 return 0; 356 } 357 358 /** 359 * drm_mode_config_init - initialize DRM mode_configuration structure 360 * @dev: DRM device 361 * 362 * Initialize @dev's mode_config structure, used for tracking the graphics 363 * configuration of @dev. 364 * 365 * Since this initializes the modeset locks, no locking is possible. Which is no 366 * problem, since this should happen single threaded at init time. It is the 367 * driver's problem to ensure this guarantee. 368 * 369 */ 370 void drm_mode_config_init(struct drm_device *dev) 371 { 372 mutex_init(&dev->mode_config.mutex); 373 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 374 mutex_init(&dev->mode_config.idr_mutex); 375 mutex_init(&dev->mode_config.fb_lock); 376 mutex_init(&dev->mode_config.blob_lock); 377 INIT_LIST_HEAD(&dev->mode_config.fb_list); 378 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 379 INIT_LIST_HEAD(&dev->mode_config.connector_list); 380 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 381 INIT_LIST_HEAD(&dev->mode_config.property_list); 382 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 383 INIT_LIST_HEAD(&dev->mode_config.plane_list); 384 idr_init(&dev->mode_config.crtc_idr); 385 idr_init(&dev->mode_config.tile_idr); 386 ida_init(&dev->mode_config.connector_ida); 387 spin_lock_init(&dev->mode_config.connector_list_lock); 388 389 init_llist_head(&dev->mode_config.connector_free_list); 390 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn); 391 392 drm_mode_create_standard_properties(dev); 393 394 /* Just to be sure */ 395 dev->mode_config.num_fb = 0; 396 dev->mode_config.num_connector = 0; 397 dev->mode_config.num_crtc = 0; 398 dev->mode_config.num_encoder = 0; 399 dev->mode_config.num_total_plane = 0; 400 } 401 EXPORT_SYMBOL(drm_mode_config_init); 402 403 /** 404 * drm_mode_config_cleanup - free up DRM mode_config info 405 * @dev: DRM device 406 * 407 * Free up all the connectors and CRTCs associated with this DRM device, then 408 * free up the framebuffers and associated buffer objects. 409 * 410 * Note that since this /should/ happen single-threaded at driver/device 411 * teardown time, no locking is required. It's the driver's job to ensure that 412 * this guarantee actually holds true. 413 * 414 * FIXME: cleanup any dangling user buffer objects too 415 */ 416 void drm_mode_config_cleanup(struct drm_device *dev) 417 { 418 struct drm_connector *connector; 419 struct drm_connector_list_iter conn_iter; 420 struct drm_crtc *crtc, *ct; 421 struct drm_encoder *encoder, *enct; 422 struct drm_framebuffer *fb, *fbt; 423 struct drm_property *property, *pt; 424 struct drm_property_blob *blob, *bt; 425 struct drm_plane *plane, *plt; 426 427 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 428 head) { 429 encoder->funcs->destroy(encoder); 430 } 431 432 drm_connector_list_iter_begin(dev, &conn_iter); 433 drm_for_each_connector_iter(connector, &conn_iter) { 434 /* drm_connector_list_iter holds an full reference to the 435 * current connector itself, which means it is inherently safe 436 * against unreferencing the current connector - but not against 437 * deleting it right away. */ 438 drm_connector_put(connector); 439 } 440 drm_connector_list_iter_end(&conn_iter); 441 /* connector_iter drops references in a work item. */ 442 flush_work(&dev->mode_config.connector_free_work); 443 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) { 444 drm_connector_list_iter_begin(dev, &conn_iter); 445 drm_for_each_connector_iter(connector, &conn_iter) 446 DRM_ERROR("connector %s leaked!\n", connector->name); 447 drm_connector_list_iter_end(&conn_iter); 448 } 449 450 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 451 head) { 452 drm_property_destroy(dev, property); 453 } 454 455 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 456 head) { 457 plane->funcs->destroy(plane); 458 } 459 460 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 461 crtc->funcs->destroy(crtc); 462 } 463 464 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 465 head_global) { 466 drm_property_blob_put(blob); 467 } 468 469 /* 470 * Single-threaded teardown context, so it's not required to grab the 471 * fb_lock to protect against concurrent fb_list access. Contrary, it 472 * would actually deadlock with the drm_framebuffer_cleanup function. 473 * 474 * Also, if there are any framebuffers left, that's a driver leak now, 475 * so politely WARN about this. 476 */ 477 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 478 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 479 struct drm_printer p = drm_debug_printer("[leaked fb]"); 480 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id); 481 drm_framebuffer_print_info(&p, 1, fb); 482 drm_framebuffer_free(&fb->base.refcount); 483 } 484 485 ida_destroy(&dev->mode_config.connector_ida); 486 idr_destroy(&dev->mode_config.tile_idr); 487 idr_destroy(&dev->mode_config.crtc_idr); 488 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 489 } 490 EXPORT_SYMBOL(drm_mode_config_cleanup); 491