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_mode_config.h> 24 #include <drm/drmP.h> 25 26 #include "drm_crtc_internal.h" 27 #include "drm_internal.h" 28 29 int drm_modeset_register_all(struct drm_device *dev) 30 { 31 int ret; 32 33 ret = drm_plane_register_all(dev); 34 if (ret) 35 goto err_plane; 36 37 ret = drm_crtc_register_all(dev); 38 if (ret) 39 goto err_crtc; 40 41 ret = drm_encoder_register_all(dev); 42 if (ret) 43 goto err_encoder; 44 45 ret = drm_connector_register_all(dev); 46 if (ret) 47 goto err_connector; 48 49 return 0; 50 51 err_connector: 52 drm_encoder_unregister_all(dev); 53 err_encoder: 54 drm_crtc_unregister_all(dev); 55 err_crtc: 56 drm_plane_unregister_all(dev); 57 err_plane: 58 return ret; 59 } 60 61 void drm_modeset_unregister_all(struct drm_device *dev) 62 { 63 drm_connector_unregister_all(dev); 64 drm_encoder_unregister_all(dev); 65 drm_crtc_unregister_all(dev); 66 drm_plane_unregister_all(dev); 67 } 68 69 /** 70 * drm_mode_getresources - get graphics configuration 71 * @dev: drm device for the ioctl 72 * @data: data pointer for the ioctl 73 * @file_priv: drm file for the ioctl call 74 * 75 * Construct a set of configuration description structures and return 76 * them to the user, including CRTC, connector and framebuffer configuration. 77 * 78 * Called by the user via ioctl. 79 * 80 * Returns: 81 * Zero on success, negative errno on failure. 82 */ 83 int drm_mode_getresources(struct drm_device *dev, void *data, 84 struct drm_file *file_priv) 85 { 86 struct drm_mode_card_res *card_res = data; 87 struct list_head *lh; 88 struct drm_framebuffer *fb; 89 struct drm_connector *connector; 90 struct drm_crtc *crtc; 91 struct drm_encoder *encoder; 92 int ret = 0; 93 int connector_count = 0; 94 int crtc_count = 0; 95 int fb_count = 0; 96 int encoder_count = 0; 97 int copied = 0; 98 uint32_t __user *fb_id; 99 uint32_t __user *crtc_id; 100 uint32_t __user *connector_id; 101 uint32_t __user *encoder_id; 102 103 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 104 return -EINVAL; 105 106 107 mutex_lock(&file_priv->fbs_lock); 108 /* 109 * For the non-control nodes we need to limit the list of resources 110 * by IDs in the group list for this node 111 */ 112 list_for_each(lh, &file_priv->fbs) 113 fb_count++; 114 115 /* handle this in 4 parts */ 116 /* FBs */ 117 if (card_res->count_fbs >= fb_count) { 118 copied = 0; 119 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 120 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 121 if (put_user(fb->base.id, fb_id + copied)) { 122 mutex_unlock(&file_priv->fbs_lock); 123 return -EFAULT; 124 } 125 copied++; 126 } 127 } 128 card_res->count_fbs = fb_count; 129 mutex_unlock(&file_priv->fbs_lock); 130 131 /* mode_config.mutex protects the connector list against e.g. DP MST 132 * connector hot-adding. CRTC/Plane lists are invariant. */ 133 mutex_lock(&dev->mode_config.mutex); 134 drm_for_each_crtc(crtc, dev) 135 crtc_count++; 136 137 drm_for_each_connector(connector, dev) 138 connector_count++; 139 140 drm_for_each_encoder(encoder, dev) 141 encoder_count++; 142 143 card_res->max_height = dev->mode_config.max_height; 144 card_res->min_height = dev->mode_config.min_height; 145 card_res->max_width = dev->mode_config.max_width; 146 card_res->min_width = dev->mode_config.min_width; 147 148 /* CRTCs */ 149 if (card_res->count_crtcs >= crtc_count) { 150 copied = 0; 151 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 152 drm_for_each_crtc(crtc, dev) { 153 if (put_user(crtc->base.id, crtc_id + copied)) { 154 ret = -EFAULT; 155 goto out; 156 } 157 copied++; 158 } 159 } 160 card_res->count_crtcs = crtc_count; 161 162 /* Encoders */ 163 if (card_res->count_encoders >= encoder_count) { 164 copied = 0; 165 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 166 drm_for_each_encoder(encoder, dev) { 167 if (put_user(encoder->base.id, encoder_id + 168 copied)) { 169 ret = -EFAULT; 170 goto out; 171 } 172 copied++; 173 } 174 } 175 card_res->count_encoders = encoder_count; 176 177 /* Connectors */ 178 if (card_res->count_connectors >= connector_count) { 179 copied = 0; 180 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 181 drm_for_each_connector(connector, dev) { 182 if (put_user(connector->base.id, 183 connector_id + copied)) { 184 ret = -EFAULT; 185 goto out; 186 } 187 copied++; 188 } 189 } 190 card_res->count_connectors = connector_count; 191 192 out: 193 mutex_unlock(&dev->mode_config.mutex); 194 return ret; 195 } 196 197 /** 198 * drm_mode_config_reset - call ->reset callbacks 199 * @dev: drm device 200 * 201 * This functions calls all the crtc's, encoder's and connector's ->reset 202 * callback. Drivers can use this in e.g. their driver load or resume code to 203 * reset hardware and software state. 204 */ 205 void drm_mode_config_reset(struct drm_device *dev) 206 { 207 struct drm_crtc *crtc; 208 struct drm_plane *plane; 209 struct drm_encoder *encoder; 210 struct drm_connector *connector; 211 212 drm_for_each_plane(plane, dev) 213 if (plane->funcs->reset) 214 plane->funcs->reset(plane); 215 216 drm_for_each_crtc(crtc, dev) 217 if (crtc->funcs->reset) 218 crtc->funcs->reset(crtc); 219 220 drm_for_each_encoder(encoder, dev) 221 if (encoder->funcs->reset) 222 encoder->funcs->reset(encoder); 223 224 mutex_lock(&dev->mode_config.mutex); 225 drm_for_each_connector(connector, dev) 226 if (connector->funcs->reset) 227 connector->funcs->reset(connector); 228 mutex_unlock(&dev->mode_config.mutex); 229 } 230 EXPORT_SYMBOL(drm_mode_config_reset); 231 232 /* 233 * Global properties 234 */ 235 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 236 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 237 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 238 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 239 }; 240 241 static int drm_mode_create_standard_properties(struct drm_device *dev) 242 { 243 struct drm_property *prop; 244 int ret; 245 246 ret = drm_connector_create_standard_properties(dev); 247 if (ret) 248 return ret; 249 250 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 251 "type", drm_plane_type_enum_list, 252 ARRAY_SIZE(drm_plane_type_enum_list)); 253 if (!prop) 254 return -ENOMEM; 255 dev->mode_config.plane_type_property = prop; 256 257 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 258 "SRC_X", 0, UINT_MAX); 259 if (!prop) 260 return -ENOMEM; 261 dev->mode_config.prop_src_x = prop; 262 263 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 264 "SRC_Y", 0, UINT_MAX); 265 if (!prop) 266 return -ENOMEM; 267 dev->mode_config.prop_src_y = prop; 268 269 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 270 "SRC_W", 0, UINT_MAX); 271 if (!prop) 272 return -ENOMEM; 273 dev->mode_config.prop_src_w = prop; 274 275 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 276 "SRC_H", 0, UINT_MAX); 277 if (!prop) 278 return -ENOMEM; 279 dev->mode_config.prop_src_h = prop; 280 281 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 282 "CRTC_X", INT_MIN, INT_MAX); 283 if (!prop) 284 return -ENOMEM; 285 dev->mode_config.prop_crtc_x = prop; 286 287 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 288 "CRTC_Y", INT_MIN, INT_MAX); 289 if (!prop) 290 return -ENOMEM; 291 dev->mode_config.prop_crtc_y = prop; 292 293 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 294 "CRTC_W", 0, INT_MAX); 295 if (!prop) 296 return -ENOMEM; 297 dev->mode_config.prop_crtc_w = prop; 298 299 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 300 "CRTC_H", 0, INT_MAX); 301 if (!prop) 302 return -ENOMEM; 303 dev->mode_config.prop_crtc_h = prop; 304 305 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 306 "FB_ID", DRM_MODE_OBJECT_FB); 307 if (!prop) 308 return -ENOMEM; 309 dev->mode_config.prop_fb_id = prop; 310 311 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 312 "IN_FENCE_FD", -1, INT_MAX); 313 if (!prop) 314 return -ENOMEM; 315 dev->mode_config.prop_in_fence_fd = prop; 316 317 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 318 "OUT_FENCE_PTR", 0, U64_MAX); 319 if (!prop) 320 return -ENOMEM; 321 dev->mode_config.prop_out_fence_ptr = prop; 322 323 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 324 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 325 if (!prop) 326 return -ENOMEM; 327 dev->mode_config.prop_crtc_id = prop; 328 329 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 330 "ACTIVE"); 331 if (!prop) 332 return -ENOMEM; 333 dev->mode_config.prop_active = prop; 334 335 prop = drm_property_create(dev, 336 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 337 "MODE_ID", 0); 338 if (!prop) 339 return -ENOMEM; 340 dev->mode_config.prop_mode_id = prop; 341 342 prop = drm_property_create(dev, 343 DRM_MODE_PROP_BLOB, 344 "DEGAMMA_LUT", 0); 345 if (!prop) 346 return -ENOMEM; 347 dev->mode_config.degamma_lut_property = prop; 348 349 prop = drm_property_create_range(dev, 350 DRM_MODE_PROP_IMMUTABLE, 351 "DEGAMMA_LUT_SIZE", 0, UINT_MAX); 352 if (!prop) 353 return -ENOMEM; 354 dev->mode_config.degamma_lut_size_property = prop; 355 356 prop = drm_property_create(dev, 357 DRM_MODE_PROP_BLOB, 358 "CTM", 0); 359 if (!prop) 360 return -ENOMEM; 361 dev->mode_config.ctm_property = prop; 362 363 prop = drm_property_create(dev, 364 DRM_MODE_PROP_BLOB, 365 "GAMMA_LUT", 0); 366 if (!prop) 367 return -ENOMEM; 368 dev->mode_config.gamma_lut_property = prop; 369 370 prop = drm_property_create_range(dev, 371 DRM_MODE_PROP_IMMUTABLE, 372 "GAMMA_LUT_SIZE", 0, UINT_MAX); 373 if (!prop) 374 return -ENOMEM; 375 dev->mode_config.gamma_lut_size_property = prop; 376 377 return 0; 378 } 379 380 /** 381 * drm_mode_config_init - initialize DRM mode_configuration structure 382 * @dev: DRM device 383 * 384 * Initialize @dev's mode_config structure, used for tracking the graphics 385 * configuration of @dev. 386 * 387 * Since this initializes the modeset locks, no locking is possible. Which is no 388 * problem, since this should happen single threaded at init time. It is the 389 * driver's problem to ensure this guarantee. 390 * 391 */ 392 void drm_mode_config_init(struct drm_device *dev) 393 { 394 mutex_init(&dev->mode_config.mutex); 395 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 396 mutex_init(&dev->mode_config.idr_mutex); 397 mutex_init(&dev->mode_config.fb_lock); 398 mutex_init(&dev->mode_config.blob_lock); 399 INIT_LIST_HEAD(&dev->mode_config.fb_list); 400 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 401 INIT_LIST_HEAD(&dev->mode_config.connector_list); 402 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 403 INIT_LIST_HEAD(&dev->mode_config.property_list); 404 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 405 INIT_LIST_HEAD(&dev->mode_config.plane_list); 406 idr_init(&dev->mode_config.crtc_idr); 407 idr_init(&dev->mode_config.tile_idr); 408 ida_init(&dev->mode_config.connector_ida); 409 410 drm_modeset_lock_all(dev); 411 drm_mode_create_standard_properties(dev); 412 drm_modeset_unlock_all(dev); 413 414 /* Just to be sure */ 415 dev->mode_config.num_fb = 0; 416 dev->mode_config.num_connector = 0; 417 dev->mode_config.num_crtc = 0; 418 dev->mode_config.num_encoder = 0; 419 dev->mode_config.num_overlay_plane = 0; 420 dev->mode_config.num_total_plane = 0; 421 } 422 EXPORT_SYMBOL(drm_mode_config_init); 423 424 /** 425 * drm_mode_config_cleanup - free up DRM mode_config info 426 * @dev: DRM device 427 * 428 * Free up all the connectors and CRTCs associated with this DRM device, then 429 * free up the framebuffers and associated buffer objects. 430 * 431 * Note that since this /should/ happen single-threaded at driver/device 432 * teardown time, no locking is required. It's the driver's job to ensure that 433 * this guarantee actually holds true. 434 * 435 * FIXME: cleanup any dangling user buffer objects too 436 */ 437 void drm_mode_config_cleanup(struct drm_device *dev) 438 { 439 struct drm_connector *connector, *ot; 440 struct drm_crtc *crtc, *ct; 441 struct drm_encoder *encoder, *enct; 442 struct drm_framebuffer *fb, *fbt; 443 struct drm_property *property, *pt; 444 struct drm_property_blob *blob, *bt; 445 struct drm_plane *plane, *plt; 446 447 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 448 head) { 449 encoder->funcs->destroy(encoder); 450 } 451 452 list_for_each_entry_safe(connector, ot, 453 &dev->mode_config.connector_list, head) { 454 connector->funcs->destroy(connector); 455 } 456 457 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 458 head) { 459 drm_property_destroy(dev, property); 460 } 461 462 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 463 head) { 464 plane->funcs->destroy(plane); 465 } 466 467 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 468 crtc->funcs->destroy(crtc); 469 } 470 471 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 472 head_global) { 473 drm_property_unreference_blob(blob); 474 } 475 476 /* 477 * Single-threaded teardown context, so it's not required to grab the 478 * fb_lock to protect against concurrent fb_list access. Contrary, it 479 * would actually deadlock with the drm_framebuffer_cleanup function. 480 * 481 * Also, if there are any framebuffers left, that's a driver leak now, 482 * so politely WARN about this. 483 */ 484 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 485 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 486 drm_framebuffer_free(&fb->base.refcount); 487 } 488 489 ida_destroy(&dev->mode_config.connector_ida); 490 idr_destroy(&dev->mode_config.tile_idr); 491 idr_destroy(&dev->mode_config.crtc_idr); 492 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 493 } 494 EXPORT_SYMBOL(drm_mode_config_cleanup); 495