drivers/gpu/drm/drm_mode_config.c

   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);