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_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         mutex_init(&dev->mode_config.mutex);
 369         drm_modeset_lock_init(&dev->mode_config.connection_mutex);
 370         mutex_init(&dev->mode_config.idr_mutex);
 371         mutex_init(&dev->mode_config.fb_lock);
 372         mutex_init(&dev->mode_config.blob_lock);
 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         spin_lock_init(&dev->mode_config.connector_list_lock);
 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);