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