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 (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_get(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_put(&conn_iter);
 149                         return -EFAULT;
 150                 }
 151                 count++;
 152         }
 153         card_res->count_connectors = count;
 154         drm_connector_list_iter_put(&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_get(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_put(&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_get(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_unreference(connector);
 422         }
 423         drm_connector_list_iter_put(&conn_iter);
 424         WARN_ON(!list_empty(&dev->mode_config.connector_list));
 425
 426         list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
 427                                  head) {
 428                 drm_property_destroy(dev, property);
 429         }
 430
 431         list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
 432                                  head) {
 433                 plane->funcs->destroy(plane);
 434         }
 435
 436         list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
 437                 crtc->funcs->destroy(crtc);
 438         }
 439
 440         list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
 441                                  head_global) {
 442                 drm_property_unreference_blob(blob);
 443         }
 444
 445         /*
 446          * Single-threaded teardown context, so it's not required to grab the
 447          * fb_lock to protect against concurrent fb_list access. Contrary, it
 448          * would actually deadlock with the drm_framebuffer_cleanup function.
 449          *
 450          * Also, if there are any framebuffers left, that's a driver leak now,
 451          * so politely WARN about this.
 452          */
 453         WARN_ON(!list_empty(&dev->mode_config.fb_list));
 454         list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
 455                 drm_framebuffer_free(&fb->base.refcount);
 456         }
 457
 458         ida_destroy(&dev->mode_config.connector_ida);
 459         idr_destroy(&dev->mode_config.tile_idr);
 460         idr_destroy(&dev->mode_config.crtc_idr);
 461         drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
 462 }
 463 EXPORT_SYMBOL(drm_mode_config_cleanup);