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 -EINVAL; 101 102 103 mutex_lock(&file_priv->fbs_lock); 104 count = 0; 105 fb_id = u64_to_user_ptr(card_res->fb_id_ptr); 106 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 107 if (count < card_res->count_fbs && 108 put_user(fb->base.id, fb_id + count)) { 109 mutex_unlock(&file_priv->fbs_lock); 110 return -EFAULT; 111 } 112 count++; 113 } 114 card_res->count_fbs = count; 115 mutex_unlock(&file_priv->fbs_lock); 116 117 card_res->max_height = dev->mode_config.max_height; 118 card_res->min_height = dev->mode_config.min_height; 119 card_res->max_width = dev->mode_config.max_width; 120 card_res->min_width = dev->mode_config.min_width; 121 122 count = 0; 123 crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr); 124 drm_for_each_crtc(crtc, dev) { 125 if (drm_lease_held(file_priv, crtc->base.id)) { 126 if (count < card_res->count_crtcs && 127 put_user(crtc->base.id, crtc_id + count)) 128 return -EFAULT; 129 count++; 130 } 131 } 132 card_res->count_crtcs = count; 133 134 count = 0; 135 encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr); 136 drm_for_each_encoder(encoder, dev) { 137 if (count < card_res->count_encoders && 138 put_user(encoder->base.id, encoder_id + count)) 139 return -EFAULT; 140 count++; 141 } 142 card_res->count_encoders = count; 143 144 drm_connector_list_iter_begin(dev, &conn_iter); 145 count = 0; 146 connector_id = u64_to_user_ptr(card_res->connector_id_ptr); 147 drm_for_each_connector_iter(connector, &conn_iter) { 148 /* only expose writeback connectors if userspace understands them */ 149 if (!file_priv->writeback_connectors && 150 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)) 151 continue; 152 153 if (drm_lease_held(file_priv, connector->base.id)) { 154 if (count < card_res->count_connectors && 155 put_user(connector->base.id, connector_id + count)) { 156 drm_connector_list_iter_end(&conn_iter); 157 return -EFAULT; 158 } 159 count++; 160 } 161 } 162 card_res->count_connectors = count; 163 drm_connector_list_iter_end(&conn_iter); 164 165 return ret; 166 } 167 168 /** 169 * drm_mode_config_reset - call ->reset callbacks 170 * @dev: drm device 171 * 172 * This functions calls all the crtc's, encoder's and connector's ->reset 173 * callback. Drivers can use this in e.g. their driver load or resume code to 174 * reset hardware and software state. 175 */ 176 void drm_mode_config_reset(struct drm_device *dev) 177 { 178 struct drm_crtc *crtc; 179 struct drm_plane *plane; 180 struct drm_encoder *encoder; 181 struct drm_connector *connector; 182 struct drm_connector_list_iter conn_iter; 183 184 drm_for_each_plane(plane, dev) 185 if (plane->funcs->reset) 186 plane->funcs->reset(plane); 187 188 drm_for_each_crtc(crtc, dev) 189 if (crtc->funcs->reset) 190 crtc->funcs->reset(crtc); 191 192 drm_for_each_encoder(encoder, dev) 193 if (encoder->funcs->reset) 194 encoder->funcs->reset(encoder); 195 196 drm_connector_list_iter_begin(dev, &conn_iter); 197 drm_for_each_connector_iter(connector, &conn_iter) 198 if (connector->funcs->reset) 199 connector->funcs->reset(connector); 200 drm_connector_list_iter_end(&conn_iter); 201 } 202 EXPORT_SYMBOL(drm_mode_config_reset); 203 204 /* 205 * Global properties 206 */ 207 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 208 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 209 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 210 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 211 }; 212 213 static int drm_mode_create_standard_properties(struct drm_device *dev) 214 { 215 struct drm_property *prop; 216 int ret; 217 218 ret = drm_connector_create_standard_properties(dev); 219 if (ret) 220 return ret; 221 222 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 223 "type", drm_plane_type_enum_list, 224 ARRAY_SIZE(drm_plane_type_enum_list)); 225 if (!prop) 226 return -ENOMEM; 227 dev->mode_config.plane_type_property = prop; 228 229 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 230 "SRC_X", 0, UINT_MAX); 231 if (!prop) 232 return -ENOMEM; 233 dev->mode_config.prop_src_x = prop; 234 235 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 236 "SRC_Y", 0, UINT_MAX); 237 if (!prop) 238 return -ENOMEM; 239 dev->mode_config.prop_src_y = prop; 240 241 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 242 "SRC_W", 0, UINT_MAX); 243 if (!prop) 244 return -ENOMEM; 245 dev->mode_config.prop_src_w = prop; 246 247 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 248 "SRC_H", 0, UINT_MAX); 249 if (!prop) 250 return -ENOMEM; 251 dev->mode_config.prop_src_h = prop; 252 253 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 254 "CRTC_X", INT_MIN, INT_MAX); 255 if (!prop) 256 return -ENOMEM; 257 dev->mode_config.prop_crtc_x = prop; 258 259 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 260 "CRTC_Y", INT_MIN, INT_MAX); 261 if (!prop) 262 return -ENOMEM; 263 dev->mode_config.prop_crtc_y = prop; 264 265 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 266 "CRTC_W", 0, INT_MAX); 267 if (!prop) 268 return -ENOMEM; 269 dev->mode_config.prop_crtc_w = prop; 270 271 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 272 "CRTC_H", 0, INT_MAX); 273 if (!prop) 274 return -ENOMEM; 275 dev->mode_config.prop_crtc_h = prop; 276 277 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 278 "FB_ID", DRM_MODE_OBJECT_FB); 279 if (!prop) 280 return -ENOMEM; 281 dev->mode_config.prop_fb_id = prop; 282 283 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 284 "IN_FENCE_FD", -1, INT_MAX); 285 if (!prop) 286 return -ENOMEM; 287 dev->mode_config.prop_in_fence_fd = prop; 288 289 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 290 "OUT_FENCE_PTR", 0, U64_MAX); 291 if (!prop) 292 return -ENOMEM; 293 dev->mode_config.prop_out_fence_ptr = prop; 294 295 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 296 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 297 if (!prop) 298 return -ENOMEM; 299 dev->mode_config.prop_crtc_id = prop; 300 301 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 302 "ACTIVE"); 303 if (!prop) 304 return -ENOMEM; 305 dev->mode_config.prop_active = prop; 306 307 prop = drm_property_create(dev, 308 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 309 "MODE_ID", 0); 310 if (!prop) 311 return -ENOMEM; 312 dev->mode_config.prop_mode_id = prop; 313 314 prop = drm_property_create(dev, 315 DRM_MODE_PROP_BLOB, 316 "DEGAMMA_LUT", 0); 317 if (!prop) 318 return -ENOMEM; 319 dev->mode_config.degamma_lut_property = prop; 320 321 prop = drm_property_create_range(dev, 322 DRM_MODE_PROP_IMMUTABLE, 323 "DEGAMMA_LUT_SIZE", 0, UINT_MAX); 324 if (!prop) 325 return -ENOMEM; 326 dev->mode_config.degamma_lut_size_property = prop; 327 328 prop = drm_property_create(dev, 329 DRM_MODE_PROP_BLOB, 330 "CTM", 0); 331 if (!prop) 332 return -ENOMEM; 333 dev->mode_config.ctm_property = prop; 334 335 prop = drm_property_create(dev, 336 DRM_MODE_PROP_BLOB, 337 "GAMMA_LUT", 0); 338 if (!prop) 339 return -ENOMEM; 340 dev->mode_config.gamma_lut_property = prop; 341 342 prop = drm_property_create_range(dev, 343 DRM_MODE_PROP_IMMUTABLE, 344 "GAMMA_LUT_SIZE", 0, UINT_MAX); 345 if (!prop) 346 return -ENOMEM; 347 dev->mode_config.gamma_lut_size_property = prop; 348 349 prop = drm_property_create(dev, 350 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 351 "IN_FORMATS", 0); 352 if (!prop) 353 return -ENOMEM; 354 dev->mode_config.modifiers_property = prop; 355 356 return 0; 357 } 358 359 /** 360 * drm_mode_config_init - initialize DRM mode_configuration structure 361 * @dev: DRM device 362 * 363 * Initialize @dev's mode_config structure, used for tracking the graphics 364 * configuration of @dev. 365 * 366 * Since this initializes the modeset locks, no locking is possible. Which is no 367 * problem, since this should happen single threaded at init time. It is the 368 * driver's problem to ensure this guarantee. 369 * 370 */ 371 void drm_mode_config_init(struct drm_device *dev) 372 { 373 mutex_init(&dev->mode_config.mutex); 374 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 375 mutex_init(&dev->mode_config.idr_mutex); 376 mutex_init(&dev->mode_config.fb_lock); 377 mutex_init(&dev->mode_config.blob_lock); 378 INIT_LIST_HEAD(&dev->mode_config.fb_list); 379 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 380 INIT_LIST_HEAD(&dev->mode_config.connector_list); 381 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 382 INIT_LIST_HEAD(&dev->mode_config.property_list); 383 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 384 INIT_LIST_HEAD(&dev->mode_config.plane_list); 385 idr_init(&dev->mode_config.crtc_idr); 386 idr_init(&dev->mode_config.tile_idr); 387 ida_init(&dev->mode_config.connector_ida); 388 spin_lock_init(&dev->mode_config.connector_list_lock); 389 390 init_llist_head(&dev->mode_config.connector_free_list); 391 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn); 392 393 drm_mode_create_standard_properties(dev); 394 395 /* Just to be sure */ 396 dev->mode_config.num_fb = 0; 397 dev->mode_config.num_connector = 0; 398 dev->mode_config.num_crtc = 0; 399 dev->mode_config.num_encoder = 0; 400 dev->mode_config.num_total_plane = 0; 401 } 402 EXPORT_SYMBOL(drm_mode_config_init); 403 404 /** 405 * drm_mode_config_cleanup - free up DRM mode_config info 406 * @dev: DRM device 407 * 408 * Free up all the connectors and CRTCs associated with this DRM device, then 409 * free up the framebuffers and associated buffer objects. 410 * 411 * Note that since this /should/ happen single-threaded at driver/device 412 * teardown time, no locking is required. It's the driver's job to ensure that 413 * this guarantee actually holds true. 414 * 415 * FIXME: cleanup any dangling user buffer objects too 416 */ 417 void drm_mode_config_cleanup(struct drm_device *dev) 418 { 419 struct drm_connector *connector; 420 struct drm_connector_list_iter conn_iter; 421 struct drm_crtc *crtc, *ct; 422 struct drm_encoder *encoder, *enct; 423 struct drm_framebuffer *fb, *fbt; 424 struct drm_property *property, *pt; 425 struct drm_property_blob *blob, *bt; 426 struct drm_plane *plane, *plt; 427 428 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 429 head) { 430 encoder->funcs->destroy(encoder); 431 } 432 433 drm_connector_list_iter_begin(dev, &conn_iter); 434 drm_for_each_connector_iter(connector, &conn_iter) { 435 /* drm_connector_list_iter holds an full reference to the 436 * current connector itself, which means it is inherently safe 437 * against unreferencing the current connector - but not against 438 * deleting it right away. */ 439 drm_connector_put(connector); 440 } 441 drm_connector_list_iter_end(&conn_iter); 442 /* connector_iter drops references in a work item. */ 443 flush_work(&dev->mode_config.connector_free_work); 444 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) { 445 drm_connector_list_iter_begin(dev, &conn_iter); 446 drm_for_each_connector_iter(connector, &conn_iter) 447 DRM_ERROR("connector %s leaked!\n", connector->name); 448 drm_connector_list_iter_end(&conn_iter); 449 } 450 451 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 452 head) { 453 drm_property_destroy(dev, property); 454 } 455 456 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 457 head) { 458 plane->funcs->destroy(plane); 459 } 460 461 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 462 crtc->funcs->destroy(crtc); 463 } 464 465 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 466 head_global) { 467 drm_property_blob_put(blob); 468 } 469 470 /* 471 * Single-threaded teardown context, so it's not required to grab the 472 * fb_lock to protect against concurrent fb_list access. Contrary, it 473 * would actually deadlock with the drm_framebuffer_cleanup function. 474 * 475 * Also, if there are any framebuffers left, that's a driver leak now, 476 * so politely WARN about this. 477 */ 478 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 479 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 480 struct drm_printer p = drm_debug_printer("[leaked fb]"); 481 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id); 482 drm_framebuffer_print_info(&p, 1, fb); 483 drm_framebuffer_free(&fb->base.refcount); 484 } 485 486 ida_destroy(&dev->mode_config.connector_ida); 487 idr_destroy(&dev->mode_config.tile_idr); 488 idr_destroy(&dev->mode_config.crtc_idr); 489 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 490 } 491 EXPORT_SYMBOL(drm_mode_config_cleanup); 492