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