Pileus Git - ~andy/linux/blob - drivers/gpu/drm/drm_crtc.c

   1 /*
   2  * Copyright (c) 2006-2008 Intel Corporation
   3  * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
   4  * Copyright (c) 2008 Red Hat Inc.
   5  *
   6  * DRM core CRTC related functions
   7  *
   8  * Permission to use, copy, modify, distribute, and sell this software and its
   9  * documentation for any purpose is hereby granted without fee, provided that
  10  * the above copyright notice appear in all copies and that both that copyright
  11  * notice and this permission notice appear in supporting documentation, and
  12  * that the name of the copyright holders not be used in advertising or
  13  * publicity pertaining to distribution of the software without specific,
  14  * written prior permission.  The copyright holders make no representations
  15  * about the suitability of this software for any purpose.  It is provided "as
  16  * is" without express or implied warranty.
  17  *
  18  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  20  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  21  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  22  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  23  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  24  * OF THIS SOFTWARE.
  25  *
  26  * Authors:
  27  *      Keith Packard
  28  *      Eric Anholt <eric@anholt.net>
  29  *      Dave Airlie <airlied@linux.ie>
  30  *      Jesse Barnes <jesse.barnes@intel.com>
  31  */
  32 #include <linux/ctype.h>
  33 #include <linux/list.h>
  34 #include <linux/slab.h>
  35 #include <linux/export.h>
  36 #include <drm/drmP.h>
  37 #include <drm/drm_crtc.h>
  38 #include <drm/drm_edid.h>
  39 #include <drm/drm_fourcc.h>
  40
  41 /**
  42  * drm_modeset_lock_all - take all modeset locks
  43  * @dev: drm device
  44  *
  45  * This function takes all modeset locks, suitable where a more fine-grained
  46  * scheme isn't (yet) implemented.
  47  */
  48 void drm_modeset_lock_all(struct drm_device *dev)
  49 {
  50         struct drm_crtc *crtc;
  51
  52         mutex_lock(&dev->mode_config.mutex);
  53
  54         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
  55                 mutex_lock_nest_lock(&crtc->mutex, &dev->mode_config.mutex);
  56 }
  57 EXPORT_SYMBOL(drm_modeset_lock_all);
  58
  59 /**
  60  * drm_modeset_unlock_all - drop all modeset locks
  61  * @dev: device
  62  */
  63 void drm_modeset_unlock_all(struct drm_device *dev)
  64 {
  65         struct drm_crtc *crtc;
  66
  67         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
  68                 mutex_unlock(&crtc->mutex);
  69
  70         mutex_unlock(&dev->mode_config.mutex);
  71 }
  72 EXPORT_SYMBOL(drm_modeset_unlock_all);
  73
  74 /**
  75  * drm_warn_on_modeset_not_all_locked - check that all modeset locks are locked
  76  * @dev: device
  77  */
  78 void drm_warn_on_modeset_not_all_locked(struct drm_device *dev)
  79 {
  80         struct drm_crtc *crtc;
  81
  82         /* Locking is currently fubar in the panic handler. */
  83         if (oops_in_progress)
  84                 return;
  85
  86         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
  87                 WARN_ON(!mutex_is_locked(&crtc->mutex));
  88
  89         WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
  90 }
  91 EXPORT_SYMBOL(drm_warn_on_modeset_not_all_locked);
  92
  93 /* Avoid boilerplate.  I'm tired of typing. */
  94 #define DRM_ENUM_NAME_FN(fnname, list)                          \
  95         const char *fnname(int val)                             \
  96         {                                                       \
  97                 int i;                                          \
  98                 for (i = 0; i < ARRAY_SIZE(list); i++) {        \
  99                         if (list[i].type == val)                \
 100                                 return list[i].name;            \
 101                 }                                               \
 102                 return "(unknown)";                             \
 103         }
 104
 105 /*
 106  * Global properties
 107  */
 108 static const struct drm_prop_enum_list drm_dpms_enum_list[] =
 109 {       { DRM_MODE_DPMS_ON, "On" },
 110         { DRM_MODE_DPMS_STANDBY, "Standby" },
 111         { DRM_MODE_DPMS_SUSPEND, "Suspend" },
 112         { DRM_MODE_DPMS_OFF, "Off" }
 113 };
 114
 115 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
 116
 117 /*
 118  * Optional properties
 119  */
 120 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
 121 {
 122         { DRM_MODE_SCALE_NONE, "None" },
 123         { DRM_MODE_SCALE_FULLSCREEN, "Full" },
 124         { DRM_MODE_SCALE_CENTER, "Center" },
 125         { DRM_MODE_SCALE_ASPECT, "Full aspect" },
 126 };
 127
 128 static const struct drm_prop_enum_list drm_dithering_mode_enum_list[] =
 129 {
 130         { DRM_MODE_DITHERING_OFF, "Off" },
 131         { DRM_MODE_DITHERING_ON, "On" },
 132         { DRM_MODE_DITHERING_AUTO, "Automatic" },
 133 };
 134
 135 /*
 136  * Non-global properties, but "required" for certain connectors.
 137  */
 138 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] =
 139 {
 140         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
 141         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
 142         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
 143 };
 144
 145 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
 146
 147 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] =
 148 {
 149         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
 150         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
 151         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
 152 };
 153
 154 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
 155                  drm_dvi_i_subconnector_enum_list)
 156
 157 static const struct drm_prop_enum_list drm_tv_select_enum_list[] =
 158 {
 159         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
 160         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
 161         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
 162         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
 163         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
 164 };
 165
 166 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
 167
 168 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] =
 169 {
 170         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
 171         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
 172         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
 173         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
 174         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
 175 };
 176
 177 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
 178                  drm_tv_subconnector_enum_list)
 179
 180 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
 181         { DRM_MODE_DIRTY_OFF,      "Off"      },
 182         { DRM_MODE_DIRTY_ON,       "On"       },
 183         { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
 184 };
 185
 186 struct drm_conn_prop_enum_list {
 187         int type;
 188         const char *name;
 189         int count;
 190 };
 191
 192 /*
 193  * Connector and encoder types.
 194  */
 195 static struct drm_conn_prop_enum_list drm_connector_enum_list[] =
 196 {       { DRM_MODE_CONNECTOR_Unknown, "Unknown", 0 },
 197         { DRM_MODE_CONNECTOR_VGA, "VGA", 0 },
 198         { DRM_MODE_CONNECTOR_DVII, "DVI-I", 0 },
 199         { DRM_MODE_CONNECTOR_DVID, "DVI-D", 0 },
 200         { DRM_MODE_CONNECTOR_DVIA, "DVI-A", 0 },
 201         { DRM_MODE_CONNECTOR_Composite, "Composite", 0 },
 202         { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO", 0 },
 203         { DRM_MODE_CONNECTOR_LVDS, "LVDS", 0 },
 204         { DRM_MODE_CONNECTOR_Component, "Component", 0 },
 205         { DRM_MODE_CONNECTOR_9PinDIN, "DIN", 0 },
 206         { DRM_MODE_CONNECTOR_DisplayPort, "DP", 0 },
 207         { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A", 0 },
 208         { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B", 0 },
 209         { DRM_MODE_CONNECTOR_TV, "TV", 0 },
 210         { DRM_MODE_CONNECTOR_eDP, "eDP", 0 },
 211         { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual", 0},
 212 };
 213
 214 static const struct drm_prop_enum_list drm_encoder_enum_list[] =
 215 {       { DRM_MODE_ENCODER_NONE, "None" },
 216         { DRM_MODE_ENCODER_DAC, "DAC" },
 217         { DRM_MODE_ENCODER_TMDS, "TMDS" },
 218         { DRM_MODE_ENCODER_LVDS, "LVDS" },
 219         { DRM_MODE_ENCODER_TVDAC, "TV" },
 220         { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
 221 };
 222
 223 const char *drm_get_encoder_name(const struct drm_encoder *encoder)
 224 {
 225         static char buf[32];
 226
 227         snprintf(buf, 32, "%s-%d",
 228                  drm_encoder_enum_list[encoder->encoder_type].name,
 229                  encoder->base.id);
 230         return buf;
 231 }
 232 EXPORT_SYMBOL(drm_get_encoder_name);
 233
 234 const char *drm_get_connector_name(const struct drm_connector *connector)
 235 {
 236         static char buf[32];
 237
 238         snprintf(buf, 32, "%s-%d",
 239                  drm_connector_enum_list[connector->connector_type].name,
 240                  connector->connector_type_id);
 241         return buf;
 242 }
 243 EXPORT_SYMBOL(drm_get_connector_name);
 244
 245 const char *drm_get_connector_status_name(enum drm_connector_status status)
 246 {
 247         if (status == connector_status_connected)
 248                 return "connected";
 249         else if (status == connector_status_disconnected)
 250                 return "disconnected";
 251         else
 252                 return "unknown";
 253 }
 254 EXPORT_SYMBOL(drm_get_connector_status_name);
 255
 256 static char printable_char(int c)
 257 {
 258         return isascii(c) && isprint(c) ? c : '?';
 259 }
 260
 261 const char *drm_get_format_name(uint32_t format)
 262 {
 263         static char buf[32];
 264
 265         snprintf(buf, sizeof(buf),
 266                  "%c%c%c%c %s-endian (0x%08x)",
 267                  printable_char(format & 0xff),
 268                  printable_char((format >> 8) & 0xff),
 269                  printable_char((format >> 16) & 0xff),
 270                  printable_char((format >> 24) & 0x7f),
 271                  format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
 272                  format);
 273
 274         return buf;
 275 }
 276 EXPORT_SYMBOL(drm_get_format_name);
 277
 278 /**
 279  * drm_mode_object_get - allocate a new modeset identifier
 280  * @dev: DRM device
 281  * @obj: object pointer, used to generate unique ID
 282  * @obj_type: object type
 283  *
 284  * Create a unique identifier based on @ptr in @dev's identifier space.  Used
 285  * for tracking modes, CRTCs and connectors.
 286  *
 287  * RETURNS:
 288  * New unique (relative to other objects in @dev) integer identifier for the
 289  * object.
 290  */
 291 static int drm_mode_object_get(struct drm_device *dev,
 292                                struct drm_mode_object *obj, uint32_t obj_type)
 293 {
 294         int ret;
 295
 296         mutex_lock(&dev->mode_config.idr_mutex);
 297         ret = idr_alloc(&dev->mode_config.crtc_idr, obj, 1, 0, GFP_KERNEL);
 298         if (ret >= 0) {
 299                 /*
 300                  * Set up the object linking under the protection of the idr
 301                  * lock so that other users can't see inconsistent state.
 302                  */
 303                 obj->id = ret;
 304                 obj->type = obj_type;
 305         }
 306         mutex_unlock(&dev->mode_config.idr_mutex);
 307
 308         return ret < 0 ? ret : 0;
 309 }
 310
 311 /**
 312  * drm_mode_object_put - free a modeset identifer
 313  * @dev: DRM device
 314  * @object: object to free
 315  *
 316  * Free @id from @dev's unique identifier pool.
 317  */
 318 static void drm_mode_object_put(struct drm_device *dev,
 319                                 struct drm_mode_object *object)
 320 {
 321         mutex_lock(&dev->mode_config.idr_mutex);
 322         idr_remove(&dev->mode_config.crtc_idr, object->id);
 323         mutex_unlock(&dev->mode_config.idr_mutex);
 324 }
 325
 326 /**
 327  * drm_mode_object_find - look up a drm object with static lifetime
 328  * @dev: drm device
 329  * @id: id of the mode object
 330  * @type: type of the mode object
 331  *
 332  * Note that framebuffers cannot be looked up with this functions - since those
 333  * are reference counted, they need special treatment.
 334  */
 335 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
 336                 uint32_t id, uint32_t type)
 337 {
 338         struct drm_mode_object *obj = NULL;
 339
 340         /* Framebuffers are reference counted and need their own lookup
 341          * function.*/
 342         WARN_ON(type == DRM_MODE_OBJECT_FB);
 343
 344         mutex_lock(&dev->mode_config.idr_mutex);
 345         obj = idr_find(&dev->mode_config.crtc_idr, id);
 346         if (!obj || (obj->type != type) || (obj->id != id))
 347                 obj = NULL;
 348         mutex_unlock(&dev->mode_config.idr_mutex);
 349
 350         return obj;
 351 }
 352 EXPORT_SYMBOL(drm_mode_object_find);
 353
 354 /**
 355  * drm_framebuffer_init - initialize a framebuffer
 356  * @dev: DRM device
 357  * @fb: framebuffer to be initialized
 358  * @funcs: ... with these functions
 359  *
 360  * Allocates an ID for the framebuffer's parent mode object, sets its mode
 361  * functions & device file and adds it to the master fd list.
 362  *
 363  * IMPORTANT:
 364  * This functions publishes the fb and makes it available for concurrent access
 365  * by other users. Which means by this point the fb _must_ be fully set up -
 366  * since all the fb attributes are invariant over its lifetime, no further
 367  * locking but only correct reference counting is required.
 368  *
 369  * RETURNS:
 370  * Zero on success, error code on failure.
 371  */
 372 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
 373                          const struct drm_framebuffer_funcs *funcs)
 374 {
 375         int ret;
 376
 377         mutex_lock(&dev->mode_config.fb_lock);
 378         kref_init(&fb->refcount);
 379         INIT_LIST_HEAD(&fb->filp_head);
 380         fb->dev = dev;
 381         fb->funcs = funcs;
 382
 383         ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
 384         if (ret)
 385                 goto out;
 386
 387         /* Grab the idr reference. */
 388         drm_framebuffer_reference(fb);
 389
 390         dev->mode_config.num_fb++;
 391         list_add(&fb->head, &dev->mode_config.fb_list);
 392 out:
 393         mutex_unlock(&dev->mode_config.fb_lock);
 394
 395         return 0;
 396 }
 397 EXPORT_SYMBOL(drm_framebuffer_init);
 398
 399 static void drm_framebuffer_free(struct kref *kref)
 400 {
 401         struct drm_framebuffer *fb =
 402                         container_of(kref, struct drm_framebuffer, refcount);
 403         fb->funcs->destroy(fb);
 404 }
 405
 406 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
 407                                                         uint32_t id)
 408 {
 409         struct drm_mode_object *obj = NULL;
 410         struct drm_framebuffer *fb;
 411
 412         mutex_lock(&dev->mode_config.idr_mutex);
 413         obj = idr_find(&dev->mode_config.crtc_idr, id);
 414         if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
 415                 fb = NULL;
 416         else
 417                 fb = obj_to_fb(obj);
 418         mutex_unlock(&dev->mode_config.idr_mutex);
 419
 420         return fb;
 421 }
 422
 423 /**
 424  * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
 425  * @dev: drm device
 426  * @id: id of the fb object
 427  *
 428  * If successful, this grabs an additional reference to the framebuffer -
 429  * callers need to make sure to eventually unreference the returned framebuffer
 430  * again.
 431  */
 432 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
 433                                                uint32_t id)
 434 {
 435         struct drm_framebuffer *fb;
 436
 437         mutex_lock(&dev->mode_config.fb_lock);
 438         fb = __drm_framebuffer_lookup(dev, id);
 439         if (fb)
 440                 drm_framebuffer_reference(fb);
 441         mutex_unlock(&dev->mode_config.fb_lock);
 442
 443         return fb;
 444 }
 445 EXPORT_SYMBOL(drm_framebuffer_lookup);
 446
 447 /**
 448  * drm_framebuffer_unreference - unref a framebuffer
 449  * @fb: framebuffer to unref
 450  *
 451  * This functions decrements the fb's refcount and frees it if it drops to zero.
 452  */
 453 void drm_framebuffer_unreference(struct drm_framebuffer *fb)
 454 {
 455         DRM_DEBUG("FB ID: %d\n", fb->base.id);
 456         kref_put(&fb->refcount, drm_framebuffer_free);
 457 }
 458 EXPORT_SYMBOL(drm_framebuffer_unreference);
 459
 460 /**
 461  * drm_framebuffer_reference - incr the fb refcnt
 462  * @fb: framebuffer
 463  */
 464 void drm_framebuffer_reference(struct drm_framebuffer *fb)
 465 {
 466         DRM_DEBUG("FB ID: %d\n", fb->base.id);
 467         kref_get(&fb->refcount);
 468 }
 469 EXPORT_SYMBOL(drm_framebuffer_reference);
 470
 471 static void drm_framebuffer_free_bug(struct kref *kref)
 472 {
 473         BUG();
 474 }
 475
 476 static void __drm_framebuffer_unreference(struct drm_framebuffer *fb)
 477 {
 478         DRM_DEBUG("FB ID: %d\n", fb->base.id);
 479         kref_put(&fb->refcount, drm_framebuffer_free_bug);
 480 }
 481
 482 /* dev->mode_config.fb_lock must be held! */
 483 static void __drm_framebuffer_unregister(struct drm_device *dev,
 484                                          struct drm_framebuffer *fb)
 485 {
 486         mutex_lock(&dev->mode_config.idr_mutex);
 487         idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
 488         mutex_unlock(&dev->mode_config.idr_mutex);
 489
 490         fb->base.id = 0;
 491
 492         __drm_framebuffer_unreference(fb);
 493 }
 494
 495 /**
 496  * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
 497  * @fb: fb to unregister
 498  *
 499  * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
 500  * those used for fbdev. Note that the caller must hold a reference of it's own,
 501  * i.e. the object may not be destroyed through this call (since it'll lead to a
 502  * locking inversion).
 503  */
 504 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
 505 {
 506         struct drm_device *dev = fb->dev;
 507
 508         mutex_lock(&dev->mode_config.fb_lock);
 509         /* Mark fb as reaped and drop idr ref. */
 510         __drm_framebuffer_unregister(dev, fb);
 511         mutex_unlock(&dev->mode_config.fb_lock);
 512 }
 513 EXPORT_SYMBOL(drm_framebuffer_unregister_private);
 514
 515 /**
 516  * drm_framebuffer_cleanup - remove a framebuffer object
 517  * @fb: framebuffer to remove
 518  *
 519  * Cleanup references to a user-created framebuffer. This function is intended
 520  * to be used from the drivers ->destroy callback.
 521  *
 522  * Note that this function does not remove the fb from active usuage - if it is
 523  * still used anywhere, hilarity can ensue since userspace could call getfb on
 524  * the id and get back -EINVAL. Obviously no concern at driver unload time.
 525  *
 526  * Also, the framebuffer will not be removed from the lookup idr - for
 527  * user-created framebuffers this will happen in in the rmfb ioctl. For
 528  * driver-private objects (e.g. for fbdev) drivers need to explicitly call
 529  * drm_framebuffer_unregister_private.
 530  */
 531 void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
 532 {
 533         struct drm_device *dev = fb->dev;
 534
 535         mutex_lock(&dev->mode_config.fb_lock);
 536         list_del(&fb->head);
 537         dev->mode_config.num_fb--;
 538         mutex_unlock(&dev->mode_config.fb_lock);
 539 }
 540 EXPORT_SYMBOL(drm_framebuffer_cleanup);
 541
 542 /**
 543  * drm_framebuffer_remove - remove and unreference a framebuffer object
 544  * @fb: framebuffer to remove
 545  *
 546  * Scans all the CRTCs and planes in @dev's mode_config.  If they're
 547  * using @fb, removes it, setting it to NULL. Then drops the reference to the
 548  * passed-in framebuffer. Might take the modeset locks.
 549  *
 550  * Note that this function optimizes the cleanup away if the caller holds the
 551  * last reference to the framebuffer. It is also guaranteed to not take the
 552  * modeset locks in this case.
 553  */
 554 void drm_framebuffer_remove(struct drm_framebuffer *fb)
 555 {
 556         struct drm_device *dev = fb->dev;
 557         struct drm_crtc *crtc;
 558         struct drm_plane *plane;
 559         struct drm_mode_set set;
 560         int ret;
 561
 562         WARN_ON(!list_empty(&fb->filp_head));
 563
 564         /*
 565          * drm ABI mandates that we remove any deleted framebuffers from active
 566          * useage. But since most sane clients only remove framebuffers they no
 567          * longer need, try to optimize this away.
 568          *
 569          * Since we're holding a reference ourselves, observing a refcount of 1
 570          * means that we're the last holder and can skip it. Also, the refcount
 571          * can never increase from 1 again, so we don't need any barriers or
 572          * locks.
 573          *
 574          * Note that userspace could try to race with use and instate a new
 575          * usage _after_ we've cleared all current ones. End result will be an
 576          * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
 577          * in this manner.
 578          */
 579         if (atomic_read(&fb->refcount.refcount) > 1) {
 580                 drm_modeset_lock_all(dev);
 581                 /* remove from any CRTC */
 582                 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 583                         if (crtc->fb == fb) {
 584                                 /* should turn off the crtc */
 585                                 memset(&set, 0, sizeof(struct drm_mode_set));
 586                                 set.crtc = crtc;
 587                                 set.fb = NULL;
 588                                 ret = drm_mode_set_config_internal(&set);
 589                                 if (ret)
 590                                         DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
 591                         }
 592                 }
 593
 594                 list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
 595                         if (plane->fb == fb) {
 596                                 /* should turn off the crtc */
 597                                 ret = plane->funcs->disable_plane(plane);
 598                                 if (ret)
 599                                         DRM_ERROR("failed to disable plane with busy fb\n");
 600                                 /* disconnect the plane from the fb and crtc: */
 601                                 __drm_framebuffer_unreference(plane->fb);
 602                                 plane->fb = NULL;
 603                                 plane->crtc = NULL;
 604                         }
 605                 }
 606                 drm_modeset_unlock_all(dev);
 607         }
 608
 609         drm_framebuffer_unreference(fb);
 610 }
 611 EXPORT_SYMBOL(drm_framebuffer_remove);
 612
 613 /**
 614  * drm_crtc_init - Initialise a new CRTC object
 615  * @dev: DRM device
 616  * @crtc: CRTC object to init
 617  * @funcs: callbacks for the new CRTC
 618  *
 619  * Inits a new object created as base part of an driver crtc object.
 620  *
 621  * RETURNS:
 622  * Zero on success, error code on failure.
 623  */
 624 int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
 625                    const struct drm_crtc_funcs *funcs)
 626 {
 627         int ret;
 628
 629         crtc->dev = dev;
 630         crtc->funcs = funcs;
 631         crtc->invert_dimensions = false;
 632
 633         drm_modeset_lock_all(dev);
 634         mutex_init(&crtc->mutex);
 635         mutex_lock_nest_lock(&crtc->mutex, &dev->mode_config.mutex);
 636
 637         ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
 638         if (ret)
 639                 goto out;
 640
 641         crtc->base.properties = &crtc->properties;
 642
 643         list_add_tail(&crtc->head, &dev->mode_config.crtc_list);
 644         dev->mode_config.num_crtc++;
 645
 646  out:
 647         drm_modeset_unlock_all(dev);
 648
 649         return ret;
 650 }
 651 EXPORT_SYMBOL(drm_crtc_init);
 652
 653 /**
 654  * drm_crtc_cleanup - Cleans up the core crtc usage.
 655  * @crtc: CRTC to cleanup
 656  *
 657  * Cleanup @crtc. Removes from drm modesetting space
 658  * does NOT free object, caller does that.
 659  */
 660 void drm_crtc_cleanup(struct drm_crtc *crtc)
 661 {
 662         struct drm_device *dev = crtc->dev;
 663
 664         kfree(crtc->gamma_store);
 665         crtc->gamma_store = NULL;
 666
 667         drm_mode_object_put(dev, &crtc->base);
 668         list_del(&crtc->head);
 669         dev->mode_config.num_crtc--;
 670 }
 671 EXPORT_SYMBOL(drm_crtc_cleanup);
 672
 673 /**
 674  * drm_mode_probed_add - add a mode to a connector's probed mode list
 675  * @connector: connector the new mode
 676  * @mode: mode data
 677  *
 678  * Add @mode to @connector's mode list for later use.
 679  */
 680 void drm_mode_probed_add(struct drm_connector *connector,
 681                          struct drm_display_mode *mode)
 682 {
 683         list_add(&mode->head, &connector->probed_modes);
 684 }
 685 EXPORT_SYMBOL(drm_mode_probed_add);
 686
 687 /**
 688  * drm_mode_remove - remove and free a mode
 689  * @connector: connector list to modify
 690  * @mode: mode to remove
 691  *
 692  * Remove @mode from @connector's mode list, then free it.
 693  */
 694 void drm_mode_remove(struct drm_connector *connector,
 695                      struct drm_display_mode *mode)
 696 {
 697         list_del(&mode->head);
 698         drm_mode_destroy(connector->dev, mode);
 699 }
 700 EXPORT_SYMBOL(drm_mode_remove);
 701
 702 /**
 703  * drm_connector_init - Init a preallocated connector
 704  * @dev: DRM device
 705  * @connector: the connector to init
 706  * @funcs: callbacks for this connector
 707  * @connector_type: user visible type of the connector
 708  *
 709  * Initialises a preallocated connector. Connectors should be
 710  * subclassed as part of driver connector objects.
 711  *
 712  * RETURNS:
 713  * Zero on success, error code on failure.
 714  */
 715 int drm_connector_init(struct drm_device *dev,
 716                        struct drm_connector *connector,
 717                        const struct drm_connector_funcs *funcs,
 718                        int connector_type)
 719 {
 720         int ret;
 721
 722         drm_modeset_lock_all(dev);
 723
 724         ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR);
 725         if (ret)
 726                 goto out;
 727
 728         connector->base.properties = &connector->properties;
 729         connector->dev = dev;
 730         connector->funcs = funcs;
 731         connector->connector_type = connector_type;
 732         connector->connector_type_id =
 733                 ++drm_connector_enum_list[connector_type].count; /* TODO */
 734         INIT_LIST_HEAD(&connector->probed_modes);
 735         INIT_LIST_HEAD(&connector->modes);
 736         connector->edid_blob_ptr = NULL;
 737         connector->status = connector_status_unknown;
 738
 739         list_add_tail(&connector->head, &dev->mode_config.connector_list);
 740         dev->mode_config.num_connector++;
 741
 742         if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
 743                 drm_object_attach_property(&connector->base,
 744                                               dev->mode_config.edid_property,
 745                                               0);
 746
 747         drm_object_attach_property(&connector->base,
 748                                       dev->mode_config.dpms_property, 0);
 749
 750  out:
 751         drm_modeset_unlock_all(dev);
 752
 753         return ret;
 754 }
 755 EXPORT_SYMBOL(drm_connector_init);
 756
 757 /**
 758  * drm_connector_cleanup - cleans up an initialised connector
 759  * @connector: connector to cleanup
 760  *
 761  * Cleans up the connector but doesn't free the object.
 762  */
 763 void drm_connector_cleanup(struct drm_connector *connector)
 764 {
 765         struct drm_device *dev = connector->dev;
 766         struct drm_display_mode *mode, *t;
 767
 768         list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
 769                 drm_mode_remove(connector, mode);
 770
 771         list_for_each_entry_safe(mode, t, &connector->modes, head)
 772                 drm_mode_remove(connector, mode);
 773
 774         drm_mode_object_put(dev, &connector->base);
 775         list_del(&connector->head);
 776         dev->mode_config.num_connector--;
 777 }
 778 EXPORT_SYMBOL(drm_connector_cleanup);
 779
 780 void drm_connector_unplug_all(struct drm_device *dev)
 781 {
 782         struct drm_connector *connector;
 783
 784         /* taking the mode config mutex ends up in a clash with sysfs */
 785         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
 786                 drm_sysfs_connector_remove(connector);
 787
 788 }
 789 EXPORT_SYMBOL(drm_connector_unplug_all);
 790
 791 int drm_encoder_init(struct drm_device *dev,
 792                       struct drm_encoder *encoder,
 793                       const struct drm_encoder_funcs *funcs,
 794                       int encoder_type)
 795 {
 796         int ret;
 797
 798         drm_modeset_lock_all(dev);
 799
 800         ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
 801         if (ret)
 802                 goto out;
 803
 804         encoder->dev = dev;
 805         encoder->encoder_type = encoder_type;
 806         encoder->funcs = funcs;
 807
 808         list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
 809         dev->mode_config.num_encoder++;
 810
 811  out:
 812         drm_modeset_unlock_all(dev);
 813
 814         return ret;
 815 }
 816 EXPORT_SYMBOL(drm_encoder_init);
 817
 818 void drm_encoder_cleanup(struct drm_encoder *encoder)
 819 {
 820         struct drm_device *dev = encoder->dev;
 821         drm_modeset_lock_all(dev);
 822         drm_mode_object_put(dev, &encoder->base);
 823         list_del(&encoder->head);
 824         dev->mode_config.num_encoder--;
 825         drm_modeset_unlock_all(dev);
 826 }
 827 EXPORT_SYMBOL(drm_encoder_cleanup);
 828
 829 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
 830                    unsigned long possible_crtcs,
 831                    const struct drm_plane_funcs *funcs,
 832                    const uint32_t *formats, uint32_t format_count,
 833                    bool priv)
 834 {
 835         int ret;
 836
 837         drm_modeset_lock_all(dev);
 838
 839         ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
 840         if (ret)
 841                 goto out;
 842
 843         plane->base.properties = &plane->properties;
 844         plane->dev = dev;
 845         plane->funcs = funcs;
 846         plane->format_types = kmalloc(sizeof(uint32_t) * format_count,
 847                                       GFP_KERNEL);
 848         if (!plane->format_types) {
 849                 DRM_DEBUG_KMS("out of memory when allocating plane\n");
 850                 drm_mode_object_put(dev, &plane->base);
 851                 ret = -ENOMEM;
 852                 goto out;
 853         }
 854
 855         memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
 856         plane->format_count = format_count;
 857         plane->possible_crtcs = possible_crtcs;
 858
 859         /* private planes are not exposed to userspace, but depending on
 860          * display hardware, might be convenient to allow sharing programming
 861          * for the scanout engine with the crtc implementation.
 862          */
 863         if (!priv) {
 864                 list_add_tail(&plane->head, &dev->mode_config.plane_list);
 865                 dev->mode_config.num_plane++;
 866         } else {
 867                 INIT_LIST_HEAD(&plane->head);
 868         }
 869
 870  out:
 871         drm_modeset_unlock_all(dev);
 872
 873         return ret;
 874 }
 875 EXPORT_SYMBOL(drm_plane_init);
 876
 877 void drm_plane_cleanup(struct drm_plane *plane)
 878 {
 879         struct drm_device *dev = plane->dev;
 880
 881         drm_modeset_lock_all(dev);
 882         kfree(plane->format_types);
 883         drm_mode_object_put(dev, &plane->base);
 884         /* if not added to a list, it must be a private plane */
 885         if (!list_empty(&plane->head)) {
 886                 list_del(&plane->head);
 887                 dev->mode_config.num_plane--;
 888         }
 889         drm_modeset_unlock_all(dev);
 890 }
 891 EXPORT_SYMBOL(drm_plane_cleanup);
 892
 893 /**
 894  * drm_mode_create - create a new display mode
 895  * @dev: DRM device
 896  *
 897  * Create a new drm_display_mode, give it an ID, and return it.
 898  *
 899  * RETURNS:
 900  * Pointer to new mode on success, NULL on error.
 901  */
 902 struct drm_display_mode *drm_mode_create(struct drm_device *dev)
 903 {
 904         struct drm_display_mode *nmode;
 905
 906         nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
 907         if (!nmode)
 908                 return NULL;
 909
 910         if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) {
 911                 kfree(nmode);
 912                 return NULL;
 913         }
 914
 915         return nmode;
 916 }
 917 EXPORT_SYMBOL(drm_mode_create);
 918
 919 /**
 920  * drm_mode_destroy - remove a mode
 921  * @dev: DRM device
 922  * @mode: mode to remove
 923  *
 924  * Free @mode's unique identifier, then free it.
 925  */
 926 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
 927 {
 928         if (!mode)
 929                 return;
 930
 931         drm_mode_object_put(dev, &mode->base);
 932
 933         kfree(mode);
 934 }
 935 EXPORT_SYMBOL(drm_mode_destroy);
 936
 937 static int drm_mode_create_standard_connector_properties(struct drm_device *dev)
 938 {
 939         struct drm_property *edid;
 940         struct drm_property *dpms;
 941
 942         /*
 943          * Standard properties (apply to all connectors)
 944          */
 945         edid = drm_property_create(dev, DRM_MODE_PROP_BLOB |
 946                                    DRM_MODE_PROP_IMMUTABLE,
 947                                    "EDID", 0);
 948         dev->mode_config.edid_property = edid;
 949
 950         dpms = drm_property_create_enum(dev, 0,
 951                                    "DPMS", drm_dpms_enum_list,
 952                                    ARRAY_SIZE(drm_dpms_enum_list));
 953         dev->mode_config.dpms_property = dpms;
 954
 955         return 0;
 956 }
 957
 958 /**
 959  * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
 960  * @dev: DRM device
 961  *
 962  * Called by a driver the first time a DVI-I connector is made.
 963  */
 964 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
 965 {
 966         struct drm_property *dvi_i_selector;
 967         struct drm_property *dvi_i_subconnector;
 968
 969         if (dev->mode_config.dvi_i_select_subconnector_property)
 970                 return 0;
 971
 972         dvi_i_selector =
 973                 drm_property_create_enum(dev, 0,
 974                                     "select subconnector",
 975                                     drm_dvi_i_select_enum_list,
 976                                     ARRAY_SIZE(drm_dvi_i_select_enum_list));
 977         dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
 978
 979         dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
 980                                     "subconnector",
 981                                     drm_dvi_i_subconnector_enum_list,
 982                                     ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
 983         dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
 984
 985         return 0;
 986 }
 987 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
 988
 989 /**
 990  * drm_create_tv_properties - create TV specific connector properties
 991  * @dev: DRM device
 992  * @num_modes: number of different TV formats (modes) supported
 993  * @modes: array of pointers to strings containing name of each format
 994  *
 995  * Called by a driver's TV initialization routine, this function creates
 996  * the TV specific connector properties for a given device.  Caller is
 997  * responsible for allocating a list of format names and passing them to
 998  * this routine.
 999  */
1000 int drm_mode_create_tv_properties(struct drm_device *dev, int num_modes,
1001                                   char *modes[])
1002 {
1003         struct drm_property *tv_selector;
1004         struct drm_property *tv_subconnector;
1005         int i;
1006
1007         if (dev->mode_config.tv_select_subconnector_property)
1008                 return 0;
1009
1010         /*
1011          * Basic connector properties
1012          */
1013         tv_selector = drm_property_create_enum(dev, 0,
1014                                           "select subconnector",
1015                                           drm_tv_select_enum_list,
1016                                           ARRAY_SIZE(drm_tv_select_enum_list));
1017         dev->mode_config.tv_select_subconnector_property = tv_selector;
1018
1019         tv_subconnector =
1020                 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1021                                     "subconnector",
1022                                     drm_tv_subconnector_enum_list,
1023                                     ARRAY_SIZE(drm_tv_subconnector_enum_list));
1024         dev->mode_config.tv_subconnector_property = tv_subconnector;
1025
1026         /*
1027          * Other, TV specific properties: margins & TV modes.
1028          */
1029         dev->mode_config.tv_left_margin_property =
1030                 drm_property_create_range(dev, 0, "left margin", 0, 100);
1031
1032         dev->mode_config.tv_right_margin_property =
1033                 drm_property_create_range(dev, 0, "right margin", 0, 100);
1034
1035         dev->mode_config.tv_top_margin_property =
1036                 drm_property_create_range(dev, 0, "top margin", 0, 100);
1037
1038         dev->mode_config.tv_bottom_margin_property =
1039                 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1040
1041         dev->mode_config.tv_mode_property =
1042                 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1043                                     "mode", num_modes);
1044         for (i = 0; i < num_modes; i++)
1045                 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1046                                       i, modes[i]);
1047
1048         dev->mode_config.tv_brightness_property =
1049                 drm_property_create_range(dev, 0, "brightness", 0, 100);
1050
1051         dev->mode_config.tv_contrast_property =
1052                 drm_property_create_range(dev, 0, "contrast", 0, 100);
1053
1054         dev->mode_config.tv_flicker_reduction_property =
1055                 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1056
1057         dev->mode_config.tv_overscan_property =
1058                 drm_property_create_range(dev, 0, "overscan", 0, 100);
1059
1060         dev->mode_config.tv_saturation_property =
1061                 drm_property_create_range(dev, 0, "saturation", 0, 100);
1062
1063         dev->mode_config.tv_hue_property =
1064                 drm_property_create_range(dev, 0, "hue", 0, 100);
1065
1066         return 0;
1067 }
1068 EXPORT_SYMBOL(drm_mode_create_tv_properties);
1069
1070 /**
1071  * drm_mode_create_scaling_mode_property - create scaling mode property
1072  * @dev: DRM device
1073  *
1074  * Called by a driver the first time it's needed, must be attached to desired
1075  * connectors.
1076  */
1077 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1078 {
1079         struct drm_property *scaling_mode;
1080
1081         if (dev->mode_config.scaling_mode_property)
1082                 return 0;
1083
1084         scaling_mode =
1085                 drm_property_create_enum(dev, 0, "scaling mode",
1086                                 drm_scaling_mode_enum_list,
1087                                     ARRAY_SIZE(drm_scaling_mode_enum_list));
1088
1089         dev->mode_config.scaling_mode_property = scaling_mode;
1090
1091         return 0;
1092 }
1093 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1094
1095 /**
1096  * drm_mode_create_dithering_property - create dithering property
1097  * @dev: DRM device
1098  *
1099  * Called by a driver the first time it's needed, must be attached to desired
1100  * connectors.
1101  */
1102 int drm_mode_create_dithering_property(struct drm_device *dev)
1103 {
1104         struct drm_property *dithering_mode;
1105
1106         if (dev->mode_config.dithering_mode_property)
1107                 return 0;
1108
1109         dithering_mode =
1110                 drm_property_create_enum(dev, 0, "dithering",
1111                                 drm_dithering_mode_enum_list,
1112                                     ARRAY_SIZE(drm_dithering_mode_enum_list));
1113         dev->mode_config.dithering_mode_property = dithering_mode;
1114
1115         return 0;
1116 }
1117 EXPORT_SYMBOL(drm_mode_create_dithering_property);
1118
1119 /**
1120  * drm_mode_create_dirty_property - create dirty property
1121  * @dev: DRM device
1122  *
1123  * Called by a driver the first time it's needed, must be attached to desired
1124  * connectors.
1125  */
1126 int drm_mode_create_dirty_info_property(struct drm_device *dev)
1127 {
1128         struct drm_property *dirty_info;
1129
1130         if (dev->mode_config.dirty_info_property)
1131                 return 0;
1132
1133         dirty_info =
1134                 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1135                                     "dirty",
1136                                     drm_dirty_info_enum_list,
1137                                     ARRAY_SIZE(drm_dirty_info_enum_list));
1138         dev->mode_config.dirty_info_property = dirty_info;
1139
1140         return 0;
1141 }
1142 EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
1143
1144 static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
1145 {
1146         uint32_t total_objects = 0;
1147
1148         total_objects += dev->mode_config.num_crtc;
1149         total_objects += dev->mode_config.num_connector;
1150         total_objects += dev->mode_config.num_encoder;
1151
1152         group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL);
1153         if (!group->id_list)
1154                 return -ENOMEM;
1155
1156         group->num_crtcs = 0;
1157         group->num_connectors = 0;
1158         group->num_encoders = 0;
1159         return 0;
1160 }
1161
1162 int drm_mode_group_init_legacy_group(struct drm_device *dev,
1163                                      struct drm_mode_group *group)
1164 {
1165         struct drm_crtc *crtc;
1166         struct drm_encoder *encoder;
1167         struct drm_connector *connector;
1168         int ret;
1169
1170         if ((ret = drm_mode_group_init(dev, group)))
1171                 return ret;
1172
1173         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
1174                 group->id_list[group->num_crtcs++] = crtc->base.id;
1175
1176         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
1177                 group->id_list[group->num_crtcs + group->num_encoders++] =
1178                 encoder->base.id;
1179
1180         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1181                 group->id_list[group->num_crtcs + group->num_encoders +
1182                                group->num_connectors++] = connector->base.id;
1183
1184         return 0;
1185 }
1186 EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
1187
1188 /**
1189  * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
1190  * @out: drm_mode_modeinfo struct to return to the user
1191  * @in: drm_display_mode to use
1192  *
1193  * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
1194  * the user.
1195  */
1196 static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
1197                                       const struct drm_display_mode *in)
1198 {
1199         WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
1200              in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
1201              in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
1202              in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
1203              in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
1204              "timing values too large for mode info\n");
1205
1206         out->clock = in->clock;
1207         out->hdisplay = in->hdisplay;
1208         out->hsync_start = in->hsync_start;
1209         out->hsync_end = in->hsync_end;
1210         out->htotal = in->htotal;
1211         out->hskew = in->hskew;
1212         out->vdisplay = in->vdisplay;
1213         out->vsync_start = in->vsync_start;
1214         out->vsync_end = in->vsync_end;
1215         out->vtotal = in->vtotal;
1216         out->vscan = in->vscan;
1217         out->vrefresh = in->vrefresh;
1218         out->flags = in->flags;
1219         out->type = in->type;
1220         strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1221         out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1222 }
1223
1224 /**
1225  * drm_crtc_convert_to_umode - convert a modeinfo into a drm_display_mode
1226  * @out: drm_display_mode to return to the user
1227  * @in: drm_mode_modeinfo to use
1228  *
1229  * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
1230  * the caller.
1231  *
1232  * RETURNS:
1233  * Zero on success, errno on failure.
1234  */
1235 static int drm_crtc_convert_umode(struct drm_display_mode *out,
1236                                   const struct drm_mode_modeinfo *in)
1237 {
1238         if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
1239                 return -ERANGE;
1240
1241         out->clock = in->clock;
1242         out->hdisplay = in->hdisplay;
1243         out->hsync_start = in->hsync_start;
1244         out->hsync_end = in->hsync_end;
1245         out->htotal = in->htotal;
1246         out->hskew = in->hskew;
1247         out->vdisplay = in->vdisplay;
1248         out->vsync_start = in->vsync_start;
1249         out->vsync_end = in->vsync_end;
1250         out->vtotal = in->vtotal;
1251         out->vscan = in->vscan;
1252         out->vrefresh = in->vrefresh;
1253         out->flags = in->flags;
1254         out->type = in->type;
1255         strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1256         out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1257
1258         return 0;
1259 }
1260
1261 /**
1262  * drm_mode_getresources - get graphics configuration
1263  * @dev: drm device for the ioctl
1264  * @data: data pointer for the ioctl
1265  * @file_priv: drm file for the ioctl call
1266  *
1267  * Construct a set of configuration description structures and return
1268  * them to the user, including CRTC, connector and framebuffer configuration.
1269  *
1270  * Called by the user via ioctl.
1271  *
1272  * RETURNS:
1273  * Zero on success, errno on failure.
1274  */
1275 int drm_mode_getresources(struct drm_device *dev, void *data,
1276                           struct drm_file *file_priv)
1277 {
1278         struct drm_mode_card_res *card_res = data;
1279         struct list_head *lh;
1280         struct drm_framebuffer *fb;
1281         struct drm_connector *connector;
1282         struct drm_crtc *crtc;
1283         struct drm_encoder *encoder;
1284         int ret = 0;
1285         int connector_count = 0;
1286         int crtc_count = 0;
1287         int fb_count = 0;
1288         int encoder_count = 0;
1289         int copied = 0, i;
1290         uint32_t __user *fb_id;
1291         uint32_t __user *crtc_id;
1292         uint32_t __user *connector_id;
1293         uint32_t __user *encoder_id;
1294         struct drm_mode_group *mode_group;
1295
1296         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1297                 return -EINVAL;
1298
1299
1300         mutex_lock(&file_priv->fbs_lock);
1301         /*
1302          * For the non-control nodes we need to limit the list of resources
1303          * by IDs in the group list for this node
1304          */
1305         list_for_each(lh, &file_priv->fbs)
1306                 fb_count++;
1307
1308         /* handle this in 4 parts */
1309         /* FBs */
1310         if (card_res->count_fbs >= fb_count) {
1311                 copied = 0;
1312                 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1313                 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
1314                         if (put_user(fb->base.id, fb_id + copied)) {
1315                                 mutex_unlock(&file_priv->fbs_lock);
1316                                 return -EFAULT;
1317                         }
1318                         copied++;
1319                 }
1320         }
1321         card_res->count_fbs = fb_count;
1322         mutex_unlock(&file_priv->fbs_lock);
1323
1324         drm_modeset_lock_all(dev);
1325         mode_group = &file_priv->master->minor->mode_group;
1326         if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1327
1328                 list_for_each(lh, &dev->mode_config.crtc_list)
1329                         crtc_count++;
1330
1331                 list_for_each(lh, &dev->mode_config.connector_list)
1332                         connector_count++;
1333
1334                 list_for_each(lh, &dev->mode_config.encoder_list)
1335                         encoder_count++;
1336         } else {
1337
1338                 crtc_count = mode_group->num_crtcs;
1339                 connector_count = mode_group->num_connectors;
1340                 encoder_count = mode_group->num_encoders;
1341         }
1342
1343         card_res->max_height = dev->mode_config.max_height;
1344         card_res->min_height = dev->mode_config.min_height;
1345         card_res->max_width = dev->mode_config.max_width;
1346         card_res->min_width = dev->mode_config.min_width;
1347
1348         /* CRTCs */
1349         if (card_res->count_crtcs >= crtc_count) {
1350                 copied = 0;
1351                 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
1352                 if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1353                         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
1354                                             head) {
1355                                 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1356                                 if (put_user(crtc->base.id, crtc_id + copied)) {
1357                                         ret = -EFAULT;
1358                                         goto out;
1359                                 }
1360                                 copied++;
1361                         }
1362                 } else {
1363                         for (i = 0; i < mode_group->num_crtcs; i++) {
1364                                 if (put_user(mode_group->id_list[i],
1365                                              crtc_id + copied)) {
1366                                         ret = -EFAULT;
1367                                         goto out;
1368                                 }
1369                                 copied++;
1370                         }
1371                 }
1372         }
1373         card_res->count_crtcs = crtc_count;
1374
1375         /* Encoders */
1376         if (card_res->count_encoders >= encoder_count) {
1377                 copied = 0;
1378                 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
1379                 if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1380                         list_for_each_entry(encoder,
1381                                             &dev->mode_config.encoder_list,
1382                                             head) {
1383                                 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
1384                                                 drm_get_encoder_name(encoder));
1385                                 if (put_user(encoder->base.id, encoder_id +
1386                                              copied)) {
1387                                         ret = -EFAULT;
1388                                         goto out;
1389                                 }
1390                                 copied++;
1391                         }
1392                 } else {
1393                         for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) {
1394                                 if (put_user(mode_group->id_list[i],
1395                                              encoder_id + copied)) {
1396                                         ret = -EFAULT;
1397                                         goto out;
1398                                 }
1399                                 copied++;
1400                         }
1401
1402                 }
1403         }
1404         card_res->count_encoders = encoder_count;
1405
1406         /* Connectors */
1407         if (card_res->count_connectors >= connector_count) {
1408                 copied = 0;
1409                 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
1410                 if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1411                         list_for_each_entry(connector,
1412                                             &dev->mode_config.connector_list,
1413                                             head) {
1414                                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
1415                                         connector->base.id,
1416                                         drm_get_connector_name(connector));
1417                                 if (put_user(connector->base.id,
1418                                              connector_id + copied)) {
1419                                         ret = -EFAULT;
1420                                         goto out;
1421                                 }
1422                                 copied++;
1423                         }
1424                 } else {
1425                         int start = mode_group->num_crtcs +
1426                                 mode_group->num_encoders;
1427                         for (i = start; i < start + mode_group->num_connectors; i++) {
1428                                 if (put_user(mode_group->id_list[i],
1429                                              connector_id + copied)) {
1430                                         ret = -EFAULT;
1431                                         goto out;
1432                                 }
1433                                 copied++;
1434                         }
1435                 }
1436         }
1437         card_res->count_connectors = connector_count;
1438
1439         DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
1440                   card_res->count_connectors, card_res->count_encoders);
1441
1442 out:
1443         drm_modeset_unlock_all(dev);
1444         return ret;
1445 }
1446
1447 /**
1448  * drm_mode_getcrtc - get CRTC configuration
1449  * @dev: drm device for the ioctl
1450  * @data: data pointer for the ioctl
1451  * @file_priv: drm file for the ioctl call
1452  *
1453  * Construct a CRTC configuration structure to return to the user.
1454  *
1455  * Called by the user via ioctl.
1456  *
1457  * RETURNS:
1458  * Zero on success, errno on failure.
1459  */
1460 int drm_mode_getcrtc(struct drm_device *dev,
1461                      void *data, struct drm_file *file_priv)
1462 {
1463         struct drm_mode_crtc *crtc_resp = data;
1464         struct drm_crtc *crtc;
1465         struct drm_mode_object *obj;
1466         int ret = 0;
1467
1468         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1469                 return -EINVAL;
1470
1471         drm_modeset_lock_all(dev);
1472
1473         obj = drm_mode_object_find(dev, crtc_resp->crtc_id,
1474                                    DRM_MODE_OBJECT_CRTC);
1475         if (!obj) {
1476                 ret = -EINVAL;
1477                 goto out;
1478         }
1479         crtc = obj_to_crtc(obj);
1480
1481         crtc_resp->x = crtc->x;
1482         crtc_resp->y = crtc->y;
1483         crtc_resp->gamma_size = crtc->gamma_size;
1484         if (crtc->fb)
1485                 crtc_resp->fb_id = crtc->fb->base.id;
1486         else
1487                 crtc_resp->fb_id = 0;
1488
1489         if (crtc->enabled) {
1490
1491                 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode);
1492                 crtc_resp->mode_valid = 1;
1493
1494         } else {
1495                 crtc_resp->mode_valid = 0;
1496         }
1497
1498 out:
1499         drm_modeset_unlock_all(dev);
1500         return ret;
1501 }
1502
1503 /**
1504  * drm_mode_getconnector - get connector configuration
1505  * @dev: drm device for the ioctl
1506  * @data: data pointer for the ioctl
1507  * @file_priv: drm file for the ioctl call
1508  *
1509  * Construct a connector configuration structure to return to the user.
1510  *
1511  * Called by the user via ioctl.
1512  *
1513  * RETURNS:
1514  * Zero on success, errno on failure.
1515  */
1516 int drm_mode_getconnector(struct drm_device *dev, void *data,
1517                           struct drm_file *file_priv)
1518 {
1519         struct drm_mode_get_connector *out_resp = data;
1520         struct drm_mode_object *obj;
1521         struct drm_connector *connector;
1522         struct drm_display_mode *mode;
1523         int mode_count = 0;
1524         int props_count = 0;
1525         int encoders_count = 0;
1526         int ret = 0;
1527         int copied = 0;
1528         int i;
1529         struct drm_mode_modeinfo u_mode;
1530         struct drm_mode_modeinfo __user *mode_ptr;
1531         uint32_t __user *prop_ptr;
1532         uint64_t __user *prop_values;
1533         uint32_t __user *encoder_ptr;
1534
1535         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1536                 return -EINVAL;
1537
1538         memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1539
1540         DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
1541
1542         mutex_lock(&dev->mode_config.mutex);
1543
1544         obj = drm_mode_object_find(dev, out_resp->connector_id,
1545                                    DRM_MODE_OBJECT_CONNECTOR);
1546         if (!obj) {
1547                 ret = -EINVAL;
1548                 goto out;
1549         }
1550         connector = obj_to_connector(obj);
1551
1552         props_count = connector->properties.count;
1553
1554         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1555                 if (connector->encoder_ids[i] != 0) {
1556                         encoders_count++;
1557                 }
1558         }
1559
1560         if (out_resp->count_modes == 0) {
1561                 connector->funcs->fill_modes(connector,
1562                                              dev->mode_config.max_width,
1563                                              dev->mode_config.max_height);
1564         }
1565
1566         /* delayed so we get modes regardless of pre-fill_modes state */
1567         list_for_each_entry(mode, &connector->modes, head)
1568                 mode_count++;
1569
1570         out_resp->connector_id = connector->base.id;
1571         out_resp->connector_type = connector->connector_type;
1572         out_resp->connector_type_id = connector->connector_type_id;
1573         out_resp->mm_width = connector->display_info.width_mm;
1574         out_resp->mm_height = connector->display_info.height_mm;
1575         out_resp->subpixel = connector->display_info.subpixel_order;
1576         out_resp->connection = connector->status;
1577         if (connector->encoder)
1578                 out_resp->encoder_id = connector->encoder->base.id;
1579         else
1580                 out_resp->encoder_id = 0;
1581
1582         /*
1583          * This ioctl is called twice, once to determine how much space is
1584          * needed, and the 2nd time to fill it.
1585          */
1586         if ((out_resp->count_modes >= mode_count) && mode_count) {
1587                 copied = 0;
1588                 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1589                 list_for_each_entry(mode, &connector->modes, head) {
1590                         drm_crtc_convert_to_umode(&u_mode, mode);
1591                         if (copy_to_user(mode_ptr + copied,
1592                                          &u_mode, sizeof(u_mode))) {
1593                                 ret = -EFAULT;
1594                                 goto out;
1595                         }
1596                         copied++;
1597                 }
1598         }
1599         out_resp->count_modes = mode_count;
1600
1601         if ((out_resp->count_props >= props_count) && props_count) {
1602                 copied = 0;
1603                 prop_ptr = (uint32_t __user *)(unsigned long)(out_resp->props_ptr);
1604                 prop_values = (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr);
1605                 for (i = 0; i < connector->properties.count; i++) {
1606                         if (put_user(connector->properties.ids[i],
1607                                      prop_ptr + copied)) {
1608                                 ret = -EFAULT;
1609                                 goto out;
1610                         }
1611
1612                         if (put_user(connector->properties.values[i],
1613                                      prop_values + copied)) {
1614                                 ret = -EFAULT;
1615                                 goto out;
1616                         }
1617                         copied++;
1618                 }
1619         }
1620         out_resp->count_props = props_count;
1621
1622         if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1623                 copied = 0;
1624                 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1625                 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1626                         if (connector->encoder_ids[i] != 0) {
1627                                 if (put_user(connector->encoder_ids[i],
1628                                              encoder_ptr + copied)) {
1629                                         ret = -EFAULT;
1630                                         goto out;
1631                                 }
1632                                 copied++;
1633                         }
1634                 }
1635         }
1636         out_resp->count_encoders = encoders_count;
1637
1638 out:
1639         mutex_unlock(&dev->mode_config.mutex);
1640
1641         return ret;
1642 }
1643
1644 int drm_mode_getencoder(struct drm_device *dev, void *data,
1645                         struct drm_file *file_priv)
1646 {
1647         struct drm_mode_get_encoder *enc_resp = data;
1648         struct drm_mode_object *obj;
1649         struct drm_encoder *encoder;
1650         int ret = 0;
1651
1652         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1653                 return -EINVAL;
1654
1655         drm_modeset_lock_all(dev);
1656         obj = drm_mode_object_find(dev, enc_resp->encoder_id,
1657                                    DRM_MODE_OBJECT_ENCODER);
1658         if (!obj) {
1659                 ret = -EINVAL;
1660                 goto out;
1661         }
1662         encoder = obj_to_encoder(obj);
1663
1664         if (encoder->crtc)
1665                 enc_resp->crtc_id = encoder->crtc->base.id;
1666         else
1667                 enc_resp->crtc_id = 0;
1668         enc_resp->encoder_type = encoder->encoder_type;
1669         enc_resp->encoder_id = encoder->base.id;
1670         enc_resp->possible_crtcs = encoder->possible_crtcs;
1671         enc_resp->possible_clones = encoder->possible_clones;
1672
1673 out:
1674         drm_modeset_unlock_all(dev);
1675         return ret;
1676 }
1677
1678 /**
1679  * drm_mode_getplane_res - get plane info
1680  * @dev: DRM device
1681  * @data: ioctl data
1682  * @file_priv: DRM file info
1683  *
1684  * Return an plane count and set of IDs.
1685  */
1686 int drm_mode_getplane_res(struct drm_device *dev, void *data,
1687                             struct drm_file *file_priv)
1688 {
1689         struct drm_mode_get_plane_res *plane_resp = data;
1690         struct drm_mode_config *config;
1691         struct drm_plane *plane;
1692         uint32_t __user *plane_ptr;
1693         int copied = 0, ret = 0;
1694
1695         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1696                 return -EINVAL;
1697
1698         drm_modeset_lock_all(dev);
1699         config = &dev->mode_config;
1700
1701         /*
1702          * This ioctl is called twice, once to determine how much space is
1703          * needed, and the 2nd time to fill it.
1704          */
1705         if (config->num_plane &&
1706             (plane_resp->count_planes >= config->num_plane)) {
1707                 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
1708
1709                 list_for_each_entry(plane, &config->plane_list, head) {
1710                         if (put_user(plane->base.id, plane_ptr + copied)) {
1711                                 ret = -EFAULT;
1712                                 goto out;
1713                         }
1714                         copied++;
1715                 }
1716         }
1717         plane_resp->count_planes = config->num_plane;
1718
1719 out:
1720         drm_modeset_unlock_all(dev);
1721         return ret;
1722 }
1723
1724 /**
1725  * drm_mode_getplane - get plane info
1726  * @dev: DRM device
1727  * @data: ioctl data
1728  * @file_priv: DRM file info
1729  *
1730  * Return plane info, including formats supported, gamma size, any
1731  * current fb, etc.
1732  */
1733 int drm_mode_getplane(struct drm_device *dev, void *data,
1734                         struct drm_file *file_priv)
1735 {
1736         struct drm_mode_get_plane *plane_resp = data;
1737         struct drm_mode_object *obj;
1738         struct drm_plane *plane;
1739         uint32_t __user *format_ptr;
1740         int ret = 0;
1741
1742         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1743                 return -EINVAL;
1744
1745         drm_modeset_lock_all(dev);
1746         obj = drm_mode_object_find(dev, plane_resp->plane_id,
1747                                    DRM_MODE_OBJECT_PLANE);
1748         if (!obj) {
1749                 ret = -ENOENT;
1750                 goto out;
1751         }
1752         plane = obj_to_plane(obj);
1753
1754         if (plane->crtc)
1755                 plane_resp->crtc_id = plane->crtc->base.id;
1756         else
1757                 plane_resp->crtc_id = 0;
1758
1759         if (plane->fb)
1760                 plane_resp->fb_id = plane->fb->base.id;
1761         else
1762                 plane_resp->fb_id = 0;
1763
1764         plane_resp->plane_id = plane->base.id;
1765         plane_resp->possible_crtcs = plane->possible_crtcs;
1766         plane_resp->gamma_size = plane->gamma_size;
1767
1768         /*
1769          * This ioctl is called twice, once to determine how much space is
1770          * needed, and the 2nd time to fill it.
1771          */
1772         if (plane->format_count &&
1773             (plane_resp->count_format_types >= plane->format_count)) {
1774                 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
1775                 if (copy_to_user(format_ptr,
1776                                  plane->format_types,
1777                                  sizeof(uint32_t) * plane->format_count)) {
1778                         ret = -EFAULT;
1779                         goto out;
1780                 }
1781         }
1782         plane_resp->count_format_types = plane->format_count;
1783
1784 out:
1785         drm_modeset_unlock_all(dev);
1786         return ret;
1787 }
1788
1789 /**
1790  * drm_mode_setplane - set up or tear down an plane
1791  * @dev: DRM device
1792  * @data: ioctl data*
1793  * @file_priv: DRM file info
1794  *
1795  * Set plane info, including placement, fb, scaling, and other factors.
1796  * Or pass a NULL fb to disable.
1797  */
1798 int drm_mode_setplane(struct drm_device *dev, void *data,
1799                         struct drm_file *file_priv)
1800 {
1801         struct drm_mode_set_plane *plane_req = data;
1802         struct drm_mode_object *obj;
1803         struct drm_plane *plane;
1804         struct drm_crtc *crtc;
1805         struct drm_framebuffer *fb = NULL, *old_fb = NULL;
1806         int ret = 0;
1807         unsigned int fb_width, fb_height;
1808         int i;
1809
1810         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1811                 return -EINVAL;
1812
1813         /*
1814          * First, find the plane, crtc, and fb objects.  If not available,
1815          * we don't bother to call the driver.
1816          */
1817         obj = drm_mode_object_find(dev, plane_req->plane_id,
1818                                    DRM_MODE_OBJECT_PLANE);
1819         if (!obj) {
1820                 DRM_DEBUG_KMS("Unknown plane ID %d\n",
1821                               plane_req->plane_id);
1822                 return -ENOENT;
1823         }
1824         plane = obj_to_plane(obj);
1825
1826         /* No fb means shut it down */
1827         if (!plane_req->fb_id) {
1828                 drm_modeset_lock_all(dev);
1829                 old_fb = plane->fb;
1830                 plane->funcs->disable_plane(plane);
1831                 plane->crtc = NULL;
1832                 plane->fb = NULL;
1833                 drm_modeset_unlock_all(dev);
1834                 goto out;
1835         }
1836
1837         obj = drm_mode_object_find(dev, plane_req->crtc_id,
1838                                    DRM_MODE_OBJECT_CRTC);
1839         if (!obj) {
1840                 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
1841                               plane_req->crtc_id);
1842                 ret = -ENOENT;
1843                 goto out;
1844         }
1845         crtc = obj_to_crtc(obj);
1846
1847         fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
1848         if (!fb) {
1849                 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
1850                               plane_req->fb_id);
1851                 ret = -ENOENT;
1852                 goto out;
1853         }
1854
1855         /* Check whether this plane supports the fb pixel format. */
1856         for (i = 0; i < plane->format_count; i++)
1857                 if (fb->pixel_format == plane->format_types[i])
1858                         break;
1859         if (i == plane->format_count) {
1860                 DRM_DEBUG_KMS("Invalid pixel format %s\n",
1861                               drm_get_format_name(fb->pixel_format));
1862                 ret = -EINVAL;
1863                 goto out;
1864         }
1865
1866         fb_width = fb->width << 16;
1867         fb_height = fb->height << 16;
1868
1869         /* Make sure source coordinates are inside the fb. */
1870         if (plane_req->src_w > fb_width ||
1871             plane_req->src_x > fb_width - plane_req->src_w ||
1872             plane_req->src_h > fb_height ||
1873             plane_req->src_y > fb_height - plane_req->src_h) {
1874                 DRM_DEBUG_KMS("Invalid source coordinates "
1875                               "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
1876                               plane_req->src_w >> 16,
1877                               ((plane_req->src_w & 0xffff) * 15625) >> 10,
1878                               plane_req->src_h >> 16,
1879                               ((plane_req->src_h & 0xffff) * 15625) >> 10,
1880                               plane_req->src_x >> 16,
1881                               ((plane_req->src_x & 0xffff) * 15625) >> 10,
1882                               plane_req->src_y >> 16,
1883                               ((plane_req->src_y & 0xffff) * 15625) >> 10);
1884                 ret = -ENOSPC;
1885                 goto out;
1886         }
1887
1888         /* Give drivers some help against integer overflows */
1889         if (plane_req->crtc_w > INT_MAX ||
1890             plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w ||
1891             plane_req->crtc_h > INT_MAX ||
1892             plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) {
1893                 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
1894                               plane_req->crtc_w, plane_req->crtc_h,
1895                               plane_req->crtc_x, plane_req->crtc_y);
1896                 ret = -ERANGE;
1897                 goto out;
1898         }
1899
1900         drm_modeset_lock_all(dev);
1901         ret = plane->funcs->update_plane(plane, crtc, fb,
1902                                          plane_req->crtc_x, plane_req->crtc_y,
1903                                          plane_req->crtc_w, plane_req->crtc_h,
1904                                          plane_req->src_x, plane_req->src_y,
1905                                          plane_req->src_w, plane_req->src_h);
1906         if (!ret) {
1907                 old_fb = plane->fb;
1908                 plane->crtc = crtc;
1909                 plane->fb = fb;
1910                 fb = NULL;
1911         }
1912         drm_modeset_unlock_all(dev);
1913
1914 out:
1915         if (fb)
1916                 drm_framebuffer_unreference(fb);
1917         if (old_fb)
1918                 drm_framebuffer_unreference(old_fb);
1919
1920         return ret;
1921 }
1922
1923 /**
1924  * drm_mode_set_config_internal - helper to call ->set_config
1925  * @set: modeset config to set
1926  *
1927  * This is a little helper to wrap internal calls to the ->set_config driver
1928  * interface. The only thing it adds is correct refcounting dance.
1929  */
1930 int drm_mode_set_config_internal(struct drm_mode_set *set)
1931 {
1932         struct drm_crtc *crtc = set->crtc;
1933         struct drm_framebuffer *fb, *old_fb;
1934         int ret;
1935
1936         old_fb = crtc->fb;
1937         fb = set->fb;
1938
1939         ret = crtc->funcs->set_config(set);
1940         if (ret == 0) {
1941                 if (old_fb)
1942                         drm_framebuffer_unreference(old_fb);
1943                 if (fb)
1944                         drm_framebuffer_reference(fb);
1945         }
1946
1947         return ret;
1948 }
1949 EXPORT_SYMBOL(drm_mode_set_config_internal);
1950
1951 /**
1952  * drm_mode_setcrtc - set CRTC configuration
1953  * @dev: drm device for the ioctl
1954  * @data: data pointer for the ioctl
1955  * @file_priv: drm file for the ioctl call
1956  *
1957  * Build a new CRTC configuration based on user request.
1958  *
1959  * Called by the user via ioctl.
1960  *
1961  * RETURNS:
1962  * Zero on success, errno on failure.
1963  */
1964 int drm_mode_setcrtc(struct drm_device *dev, void *data,
1965                      struct drm_file *file_priv)
1966 {
1967         struct drm_mode_config *config = &dev->mode_config;
1968         struct drm_mode_crtc *crtc_req = data;
1969         struct drm_mode_object *obj;
1970         struct drm_crtc *crtc;
1971         struct drm_connector **connector_set = NULL, *connector;
1972         struct drm_framebuffer *fb = NULL;
1973         struct drm_display_mode *mode = NULL;
1974         struct drm_mode_set set;
1975         uint32_t __user *set_connectors_ptr;
1976         int ret;
1977         int i;
1978
1979         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1980                 return -EINVAL;
1981
1982         /* For some reason crtc x/y offsets are signed internally. */
1983         if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX)
1984                 return -ERANGE;
1985
1986         drm_modeset_lock_all(dev);
1987         obj = drm_mode_object_find(dev, crtc_req->crtc_id,
1988                                    DRM_MODE_OBJECT_CRTC);
1989         if (!obj) {
1990                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
1991                 ret = -EINVAL;
1992                 goto out;
1993         }
1994         crtc = obj_to_crtc(obj);
1995         DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1996
1997         if (crtc_req->mode_valid) {
1998                 int hdisplay, vdisplay;
1999                 /* If we have a mode we need a framebuffer. */
2000                 /* If we pass -1, set the mode with the currently bound fb */
2001                 if (crtc_req->fb_id == -1) {
2002                         if (!crtc->fb) {
2003                                 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
2004                                 ret = -EINVAL;
2005                                 goto out;
2006                         }
2007                         fb = crtc->fb;
2008                         /* Make refcounting symmetric with the lookup path. */
2009                         drm_framebuffer_reference(fb);
2010                 } else {
2011                         fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
2012                         if (!fb) {
2013                                 DRM_DEBUG_KMS("Unknown FB ID%d\n",
2014                                                 crtc_req->fb_id);
2015                                 ret = -EINVAL;
2016                                 goto out;
2017                         }
2018                 }
2019
2020                 mode = drm_mode_create(dev);
2021                 if (!mode) {
2022                         ret = -ENOMEM;
2023                         goto out;
2024                 }
2025
2026                 ret = drm_crtc_convert_umode(mode, &crtc_req->mode);
2027                 if (ret) {
2028                         DRM_DEBUG_KMS("Invalid mode\n");
2029                         goto out;
2030                 }
2031
2032                 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
2033
2034                 hdisplay = mode->hdisplay;
2035                 vdisplay = mode->vdisplay;
2036
2037                 if (crtc->invert_dimensions)
2038                         swap(hdisplay, vdisplay);
2039
2040                 if (hdisplay > fb->width ||
2041                     vdisplay > fb->height ||
2042                     crtc_req->x > fb->width - hdisplay ||
2043                     crtc_req->y > fb->height - vdisplay) {
2044                         DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n",
2045                                       fb->width, fb->height,
2046                                       hdisplay, vdisplay, crtc_req->x, crtc_req->y,
2047                                       crtc->invert_dimensions ? " (inverted)" : "");
2048                         ret = -ENOSPC;
2049                         goto out;
2050                 }
2051         }
2052
2053         if (crtc_req->count_connectors == 0 && mode) {
2054                 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
2055                 ret = -EINVAL;
2056                 goto out;
2057         }
2058
2059         if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
2060                 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
2061                           crtc_req->count_connectors);
2062                 ret = -EINVAL;
2063                 goto out;
2064         }
2065
2066         if (crtc_req->count_connectors > 0) {
2067                 u32 out_id;
2068
2069                 /* Avoid unbounded kernel memory allocation */
2070                 if (crtc_req->count_connectors > config->num_connector) {
2071                         ret = -EINVAL;
2072                         goto out;
2073                 }
2074
2075                 connector_set = kmalloc(crtc_req->count_connectors *
2076                                         sizeof(struct drm_connector *),
2077                                         GFP_KERNEL);
2078                 if (!connector_set) {
2079                         ret = -ENOMEM;
2080                         goto out;
2081                 }
2082
2083                 for (i = 0; i < crtc_req->count_connectors; i++) {
2084                         set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
2085                         if (get_user(out_id, &set_connectors_ptr[i])) {
2086                                 ret = -EFAULT;
2087                                 goto out;
2088                         }
2089
2090                         obj = drm_mode_object_find(dev, out_id,
2091                                                    DRM_MODE_OBJECT_CONNECTOR);
2092                         if (!obj) {
2093                                 DRM_DEBUG_KMS("Connector id %d unknown\n",
2094                                                 out_id);
2095                                 ret = -EINVAL;
2096                                 goto out;
2097                         }
2098                         connector = obj_to_connector(obj);
2099                         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
2100                                         connector->base.id,
2101                                         drm_get_connector_name(connector));
2102
2103                         connector_set[i] = connector;
2104                 }
2105         }
2106
2107         set.crtc = crtc;
2108         set.x = crtc_req->x;
2109         set.y = crtc_req->y;
2110         set.mode = mode;
2111         set.connectors = connector_set;
2112         set.num_connectors = crtc_req->count_connectors;
2113         set.fb = fb;
2114         ret = drm_mode_set_config_internal(&set);
2115
2116 out:
2117         if (fb)
2118                 drm_framebuffer_unreference(fb);
2119
2120         kfree(connector_set);
2121         drm_mode_destroy(dev, mode);
2122         drm_modeset_unlock_all(dev);
2123         return ret;
2124 }
2125
2126 int drm_mode_cursor_ioctl(struct drm_device *dev,
2127                         void *data, struct drm_file *file_priv)
2128 {
2129         struct drm_mode_cursor *req = data;
2130         struct drm_mode_object *obj;
2131         struct drm_crtc *crtc;
2132         int ret = 0;
2133
2134         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2135                 return -EINVAL;
2136
2137         if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
2138                 return -EINVAL;
2139
2140         obj = drm_mode_object_find(dev, req->crtc_id, DRM_MODE_OBJECT_CRTC);
2141         if (!obj) {
2142                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
2143                 return -EINVAL;
2144         }
2145         crtc = obj_to_crtc(obj);
2146
2147         mutex_lock(&crtc->mutex);
2148         if (req->flags & DRM_MODE_CURSOR_BO) {
2149                 if (!crtc->funcs->cursor_set) {
2150                         ret = -ENXIO;
2151                         goto out;
2152                 }
2153                 /* Turns off the cursor if handle is 0 */
2154                 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
2155                                               req->width, req->height);
2156         }
2157
2158         if (req->flags & DRM_MODE_CURSOR_MOVE) {
2159                 if (crtc->funcs->cursor_move) {
2160                         ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
2161                 } else {
2162                         ret = -EFAULT;
2163                         goto out;
2164                 }
2165         }
2166 out:
2167         mutex_unlock(&crtc->mutex);
2168
2169         return ret;
2170 }
2171
2172 /* Original addfb only supported RGB formats, so figure out which one */
2173 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
2174 {
2175         uint32_t fmt;
2176
2177         switch (bpp) {
2178         case 8:
2179                 fmt = DRM_FORMAT_C8;
2180                 break;
2181         case 16:
2182                 if (depth == 15)
2183                         fmt = DRM_FORMAT_XRGB1555;
2184                 else
2185                         fmt = DRM_FORMAT_RGB565;
2186                 break;
2187         case 24:
2188                 fmt = DRM_FORMAT_RGB888;
2189                 break;
2190         case 32:
2191                 if (depth == 24)
2192                         fmt = DRM_FORMAT_XRGB8888;
2193                 else if (depth == 30)
2194                         fmt = DRM_FORMAT_XRGB2101010;
2195                 else
2196                         fmt = DRM_FORMAT_ARGB8888;
2197                 break;
2198         default:
2199                 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
2200                 fmt = DRM_FORMAT_XRGB8888;
2201                 break;
2202         }
2203
2204         return fmt;
2205 }
2206 EXPORT_SYMBOL(drm_mode_legacy_fb_format);
2207
2208 /**
2209  * drm_mode_addfb - add an FB to the graphics configuration
2210  * @dev: drm device for the ioctl
2211  * @data: data pointer for the ioctl
2212  * @file_priv: drm file for the ioctl call
2213  *
2214  * Add a new FB to the specified CRTC, given a user request.
2215  *
2216  * Called by the user via ioctl.
2217  *
2218  * RETURNS:
2219  * Zero on success, errno on failure.
2220  */
2221 int drm_mode_addfb(struct drm_device *dev,
2222                    void *data, struct drm_file *file_priv)
2223 {
2224         struct drm_mode_fb_cmd *or = data;
2225         struct drm_mode_fb_cmd2 r = {};
2226         struct drm_mode_config *config = &dev->mode_config;
2227         struct drm_framebuffer *fb;
2228         int ret = 0;
2229
2230         /* Use new struct with format internally */
2231         r.fb_id = or->fb_id;
2232         r.width = or->width;
2233         r.height = or->height;
2234         r.pitches[0] = or->pitch;
2235         r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
2236         r.handles[0] = or->handle;
2237
2238         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2239                 return -EINVAL;
2240
2241         if ((config->min_width > r.width) || (r.width > config->max_width))
2242                 return -EINVAL;
2243
2244         if ((config->min_height > r.height) || (r.height > config->max_height))
2245                 return -EINVAL;
2246
2247         fb = dev->mode_config.funcs->fb_create(dev, file_priv, &r);
2248         if (IS_ERR(fb)) {
2249                 DRM_DEBUG_KMS("could not create framebuffer\n");
2250                 return PTR_ERR(fb);
2251         }
2252
2253         mutex_lock(&file_priv->fbs_lock);
2254         or->fb_id = fb->base.id;
2255         list_add(&fb->filp_head, &file_priv->fbs);
2256         DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
2257         mutex_unlock(&file_priv->fbs_lock);
2258
2259         return ret;
2260 }
2261
2262 static int format_check(const struct drm_mode_fb_cmd2 *r)
2263 {
2264         uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
2265
2266         switch (format) {
2267         case DRM_FORMAT_C8:
2268         case DRM_FORMAT_RGB332:
2269         case DRM_FORMAT_BGR233:
2270         case DRM_FORMAT_XRGB4444:
2271         case DRM_FORMAT_XBGR4444:
2272         case DRM_FORMAT_RGBX4444:
2273         case DRM_FORMAT_BGRX4444:
2274         case DRM_FORMAT_ARGB4444:
2275         case DRM_FORMAT_ABGR4444:
2276         case DRM_FORMAT_RGBA4444:
2277         case DRM_FORMAT_BGRA4444:
2278         case DRM_FORMAT_XRGB1555:
2279         case DRM_FORMAT_XBGR1555:
2280         case DRM_FORMAT_RGBX5551:
2281         case DRM_FORMAT_BGRX5551:
2282         case DRM_FORMAT_ARGB1555:
2283         case DRM_FORMAT_ABGR1555:
2284         case DRM_FORMAT_RGBA5551:
2285         case DRM_FORMAT_BGRA5551:
2286         case DRM_FORMAT_RGB565:
2287         case DRM_FORMAT_BGR565:
2288         case DRM_FORMAT_RGB888:
2289         case DRM_FORMAT_BGR888:
2290         case DRM_FORMAT_XRGB8888:
2291         case DRM_FORMAT_XBGR8888:
2292         case DRM_FORMAT_RGBX8888:
2293         case DRM_FORMAT_BGRX8888:
2294         case DRM_FORMAT_ARGB8888:
2295         case DRM_FORMAT_ABGR8888:
2296         case DRM_FORMAT_RGBA8888:
2297         case DRM_FORMAT_BGRA8888:
2298         case DRM_FORMAT_XRGB2101010:
2299         case DRM_FORMAT_XBGR2101010:
2300         case DRM_FORMAT_RGBX1010102:
2301         case DRM_FORMAT_BGRX1010102:
2302         case DRM_FORMAT_ARGB2101010:
2303         case DRM_FORMAT_ABGR2101010:
2304         case DRM_FORMAT_RGBA1010102:
2305         case DRM_FORMAT_BGRA1010102:
2306         case DRM_FORMAT_YUYV:
2307         case DRM_FORMAT_YVYU:
2308         case DRM_FORMAT_UYVY:
2309         case DRM_FORMAT_VYUY:
2310         case DRM_FORMAT_AYUV:
2311         case DRM_FORMAT_NV12:
2312         case DRM_FORMAT_NV21:
2313         case DRM_FORMAT_NV16:
2314         case DRM_FORMAT_NV61:
2315         case DRM_FORMAT_NV24:
2316         case DRM_FORMAT_NV42:
2317         case DRM_FORMAT_YUV410:
2318         case DRM_FORMAT_YVU410:
2319         case DRM_FORMAT_YUV411:
2320         case DRM_FORMAT_YVU411:
2321         case DRM_FORMAT_YUV420:
2322         case DRM_FORMAT_YVU420:
2323         case DRM_FORMAT_YUV422:
2324         case DRM_FORMAT_YVU422:
2325         case DRM_FORMAT_YUV444:
2326         case DRM_FORMAT_YVU444:
2327                 return 0;
2328         default:
2329                 return -EINVAL;
2330         }
2331 }
2332
2333 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
2334 {
2335         int ret, hsub, vsub, num_planes, i;
2336
2337         ret = format_check(r);
2338         if (ret) {
2339                 DRM_DEBUG_KMS("bad framebuffer format %s\n",
2340                               drm_get_format_name(r->pixel_format));
2341                 return ret;
2342         }
2343
2344         hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
2345         vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
2346         num_planes = drm_format_num_planes(r->pixel_format);
2347
2348         if (r->width == 0 || r->width % hsub) {
2349                 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->height);
2350                 return -EINVAL;
2351         }
2352
2353         if (r->height == 0 || r->height % vsub) {
2354                 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
2355                 return -EINVAL;
2356         }
2357
2358         for (i = 0; i < num_planes; i++) {
2359                 unsigned int width = r->width / (i != 0 ? hsub : 1);
2360                 unsigned int height = r->height / (i != 0 ? vsub : 1);
2361                 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
2362
2363                 if (!r->handles[i]) {
2364                         DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
2365                         return -EINVAL;
2366                 }
2367
2368                 if ((uint64_t) width * cpp > UINT_MAX)
2369                         return -ERANGE;
2370
2371                 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
2372                         return -ERANGE;
2373
2374                 if (r->pitches[i] < width * cpp) {
2375                         DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
2376                         return -EINVAL;
2377                 }
2378         }
2379
2380         return 0;
2381 }
2382
2383 /**
2384  * drm_mode_addfb2 - add an FB to the graphics configuration
2385  * @dev: drm device for the ioctl
2386  * @data: data pointer for the ioctl
2387  * @file_priv: drm file for the ioctl call
2388  *
2389  * Add a new FB to the specified CRTC, given a user request with format.
2390  *
2391  * Called by the user via ioctl.
2392  *
2393  * RETURNS:
2394  * Zero on success, errno on failure.
2395  */
2396 int drm_mode_addfb2(struct drm_device *dev,
2397                     void *data, struct drm_file *file_priv)
2398 {
2399         struct drm_mode_fb_cmd2 *r = data;
2400         struct drm_mode_config *config = &dev->mode_config;
2401         struct drm_framebuffer *fb;
2402         int ret;
2403
2404         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2405                 return -EINVAL;
2406
2407         if (r->flags & ~DRM_MODE_FB_INTERLACED) {
2408                 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
2409                 return -EINVAL;
2410         }
2411
2412         if ((config->min_width > r->width) || (r->width > config->max_width)) {
2413                 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
2414                           r->width, config->min_width, config->max_width);
2415                 return -EINVAL;
2416         }
2417         if ((config->min_height > r->height) || (r->height > config->max_height)) {
2418                 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
2419                           r->height, config->min_height, config->max_height);
2420                 return -EINVAL;
2421         }
2422
2423         ret = framebuffer_check(r);
2424         if (ret)
2425                 return ret;
2426
2427         fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
2428         if (IS_ERR(fb)) {
2429                 DRM_DEBUG_KMS("could not create framebuffer\n");
2430                 return PTR_ERR(fb);
2431         }
2432
2433         mutex_lock(&file_priv->fbs_lock);
2434         r->fb_id = fb->base.id;
2435         list_add(&fb->filp_head, &file_priv->fbs);
2436         DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
2437         mutex_unlock(&file_priv->fbs_lock);
2438
2439
2440         return ret;
2441 }
2442
2443 /**
2444  * drm_mode_rmfb - remove an FB from the configuration
2445  * @dev: drm device for the ioctl
2446  * @data: data pointer for the ioctl
2447  * @file_priv: drm file for the ioctl call
2448  *
2449  * Remove the FB specified by the user.
2450  *
2451  * Called by the user via ioctl.
2452  *
2453  * RETURNS:
2454  * Zero on success, errno on failure.
2455  */
2456 int drm_mode_rmfb(struct drm_device *dev,
2457                    void *data, struct drm_file *file_priv)
2458 {
2459         struct drm_framebuffer *fb = NULL;
2460         struct drm_framebuffer *fbl = NULL;
2461         uint32_t *id = data;
2462         int found = 0;
2463
2464         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2465                 return -EINVAL;
2466
2467         mutex_lock(&file_priv->fbs_lock);
2468         mutex_lock(&dev->mode_config.fb_lock);
2469         fb = __drm_framebuffer_lookup(dev, *id);
2470         if (!fb)
2471                 goto fail_lookup;
2472
2473         list_for_each_entry(fbl, &file_priv->fbs, filp_head)
2474                 if (fb == fbl)
2475                         found = 1;
2476         if (!found)
2477                 goto fail_lookup;
2478
2479         /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
2480         __drm_framebuffer_unregister(dev, fb);
2481
2482         list_del_init(&fb->filp_head);
2483         mutex_unlock(&dev->mode_config.fb_lock);
2484         mutex_unlock(&file_priv->fbs_lock);
2485
2486         drm_framebuffer_remove(fb);
2487
2488         return 0;
2489
2490 fail_lookup:
2491         mutex_unlock(&dev->mode_config.fb_lock);
2492         mutex_unlock(&file_priv->fbs_lock);
2493
2494         return -EINVAL;
2495 }
2496
2497 /**
2498  * drm_mode_getfb - get FB info
2499  * @dev: drm device for the ioctl
2500  * @data: data pointer for the ioctl
2501  * @file_priv: drm file for the ioctl call
2502  *
2503  * Lookup the FB given its ID and return info about it.
2504  *
2505  * Called by the user via ioctl.
2506  *
2507  * RETURNS:
2508  * Zero on success, errno on failure.
2509  */
2510 int drm_mode_getfb(struct drm_device *dev,
2511                    void *data, struct drm_file *file_priv)
2512 {
2513         struct drm_mode_fb_cmd *r = data;
2514         struct drm_framebuffer *fb;
2515         int ret;
2516
2517         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2518                 return -EINVAL;
2519
2520         fb = drm_framebuffer_lookup(dev, r->fb_id);
2521         if (!fb)
2522                 return -EINVAL;
2523
2524         r->height = fb->height;
2525         r->width = fb->width;
2526         r->depth = fb->depth;
2527         r->bpp = fb->bits_per_pixel;
2528         r->pitch = fb->pitches[0];
2529         if (fb->funcs->create_handle)
2530                 ret = fb->funcs->create_handle(fb, file_priv, &r->handle);
2531         else
2532                 ret = -ENODEV;
2533
2534         drm_framebuffer_unreference(fb);
2535
2536         return ret;
2537 }
2538
2539 int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
2540                            void *data, struct drm_file *file_priv)
2541 {
2542         struct drm_clip_rect __user *clips_ptr;
2543         struct drm_clip_rect *clips = NULL;
2544         struct drm_mode_fb_dirty_cmd *r = data;
2545         struct drm_framebuffer *fb;
2546         unsigned flags;
2547         int num_clips;
2548         int ret;
2549
2550         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2551                 return -EINVAL;
2552
2553         fb = drm_framebuffer_lookup(dev, r->fb_id);
2554         if (!fb)
2555                 return -EINVAL;
2556
2557         num_clips = r->num_clips;
2558         clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
2559
2560         if (!num_clips != !clips_ptr) {
2561                 ret = -EINVAL;
2562                 goto out_err1;
2563         }
2564
2565         flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
2566
2567         /* If userspace annotates copy, clips must come in pairs */
2568         if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
2569                 ret = -EINVAL;
2570                 goto out_err1;
2571         }
2572
2573         if (num_clips && clips_ptr) {
2574                 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
2575                         ret = -EINVAL;
2576                         goto out_err1;
2577                 }
2578                 clips = kzalloc(num_clips * sizeof(*clips), GFP_KERNEL);
2579                 if (!clips) {
2580                         ret = -ENOMEM;
2581                         goto out_err1;
2582                 }
2583
2584                 ret = copy_from_user(clips, clips_ptr,
2585                                      num_clips * sizeof(*clips));
2586                 if (ret) {
2587                         ret = -EFAULT;
2588                         goto out_err2;
2589                 }
2590         }
2591
2592         if (fb->funcs->dirty) {
2593                 drm_modeset_lock_all(dev);
2594                 ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
2595                                        clips, num_clips);
2596                 drm_modeset_unlock_all(dev);
2597         } else {
2598                 ret = -ENOSYS;
2599         }
2600
2601 out_err2:
2602         kfree(clips);
2603 out_err1:
2604         drm_framebuffer_unreference(fb);
2605
2606         return ret;
2607 }
2608
2609
2610 /**
2611  * drm_fb_release - remove and free the FBs on this file
2612  * @priv: drm file for the ioctl
2613  *
2614  * Destroy all the FBs associated with @filp.
2615  *
2616  * Called by the user via ioctl.
2617  *
2618  * RETURNS:
2619  * Zero on success, errno on failure.
2620  */
2621 void drm_fb_release(struct drm_file *priv)
2622 {
2623         struct drm_device *dev = priv->minor->dev;
2624         struct drm_framebuffer *fb, *tfb;
2625
2626         mutex_lock(&priv->fbs_lock);
2627         list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
2628
2629                 mutex_lock(&dev->mode_config.fb_lock);
2630                 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
2631                 __drm_framebuffer_unregister(dev, fb);
2632                 mutex_unlock(&dev->mode_config.fb_lock);
2633
2634                 list_del_init(&fb->filp_head);
2635
2636                 /* This will also drop the fpriv->fbs reference. */
2637                 drm_framebuffer_remove(fb);
2638         }
2639         mutex_unlock(&priv->fbs_lock);
2640 }
2641
2642 struct drm_property *drm_property_create(struct drm_device *dev, int flags,
2643                                          const char *name, int num_values)
2644 {
2645         struct drm_property *property = NULL;
2646         int ret;
2647
2648         property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
2649         if (!property)
2650                 return NULL;
2651
2652         if (num_values) {
2653                 property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL);
2654                 if (!property->values)
2655                         goto fail;
2656         }
2657
2658         ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
2659         if (ret)
2660                 goto fail;
2661
2662         property->flags = flags;
2663         property->num_values = num_values;
2664         INIT_LIST_HEAD(&property->enum_blob_list);
2665
2666         if (name) {
2667                 strncpy(property->name, name, DRM_PROP_NAME_LEN);
2668                 property->name[DRM_PROP_NAME_LEN-1] = '\0';
2669         }
2670
2671         list_add_tail(&property->head, &dev->mode_config.property_list);
2672         return property;
2673 fail:
2674         kfree(property->values);
2675         kfree(property);
2676         return NULL;
2677 }
2678 EXPORT_SYMBOL(drm_property_create);
2679
2680 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
2681                                          const char *name,
2682                                          const struct drm_prop_enum_list *props,
2683                                          int num_values)
2684 {
2685         struct drm_property *property;
2686         int i, ret;
2687
2688         flags |= DRM_MODE_PROP_ENUM;
2689
2690         property = drm_property_create(dev, flags, name, num_values);
2691         if (!property)
2692                 return NULL;
2693
2694         for (i = 0; i < num_values; i++) {
2695                 ret = drm_property_add_enum(property, i,
2696                                       props[i].type,
2697                                       props[i].name);
2698                 if (ret) {
2699                         drm_property_destroy(dev, property);
2700                         return NULL;
2701                 }
2702         }
2703
2704         return property;
2705 }
2706 EXPORT_SYMBOL(drm_property_create_enum);
2707
2708 struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
2709                                          int flags, const char *name,
2710                                          const struct drm_prop_enum_list *props,
2711                                          int num_values)
2712 {
2713         struct drm_property *property;
2714         int i, ret;
2715
2716         flags |= DRM_MODE_PROP_BITMASK;
2717
2718         property = drm_property_create(dev, flags, name, num_values);
2719         if (!property)
2720                 return NULL;
2721
2722         for (i = 0; i < num_values; i++) {
2723                 ret = drm_property_add_enum(property, i,
2724                                       props[i].type,
2725                                       props[i].name);
2726                 if (ret) {
2727                         drm_property_destroy(dev, property);
2728                         return NULL;
2729                 }
2730         }
2731
2732         return property;
2733 }
2734 EXPORT_SYMBOL(drm_property_create_bitmask);
2735
2736 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
2737                                          const char *name,
2738                                          uint64_t min, uint64_t max)
2739 {
2740         struct drm_property *property;
2741
2742         flags |= DRM_MODE_PROP_RANGE;
2743
2744         property = drm_property_create(dev, flags, name, 2);
2745         if (!property)
2746                 return NULL;
2747
2748         property->values[0] = min;
2749         property->values[1] = max;
2750
2751         return property;
2752 }
2753 EXPORT_SYMBOL(drm_property_create_range);
2754
2755 int drm_property_add_enum(struct drm_property *property, int index,
2756                           uint64_t value, const char *name)
2757 {
2758         struct drm_property_enum *prop_enum;
2759
2760         if (!(property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)))
2761                 return -EINVAL;
2762
2763         /*
2764          * Bitmask enum properties have the additional constraint of values
2765          * from 0 to 63
2766          */
2767         if ((property->flags & DRM_MODE_PROP_BITMASK) && (value > 63))
2768                 return -EINVAL;
2769
2770         if (!list_empty(&property->enum_blob_list)) {
2771                 list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
2772                         if (prop_enum->value == value) {
2773                                 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
2774                                 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
2775                                 return 0;
2776                         }
2777                 }
2778         }
2779
2780         prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
2781         if (!prop_enum)
2782                 return -ENOMEM;
2783
2784         strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
2785         prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
2786         prop_enum->value = value;
2787
2788         property->values[index] = value;
2789         list_add_tail(&prop_enum->head, &property->enum_blob_list);
2790         return 0;
2791 }
2792 EXPORT_SYMBOL(drm_property_add_enum);
2793
2794 void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
2795 {
2796         struct drm_property_enum *prop_enum, *pt;
2797
2798         list_for_each_entry_safe(prop_enum, pt, &property->enum_blob_list, head) {
2799                 list_del(&prop_enum->head);
2800                 kfree(prop_enum);
2801         }
2802
2803         if (property->num_values)
2804                 kfree(property->values);
2805         drm_mode_object_put(dev, &property->base);
2806         list_del(&property->head);
2807         kfree(property);
2808 }
2809 EXPORT_SYMBOL(drm_property_destroy);
2810
2811 void drm_object_attach_property(struct drm_mode_object *obj,
2812                                 struct drm_property *property,
2813                                 uint64_t init_val)
2814 {
2815         int count = obj->properties->count;
2816
2817         if (count == DRM_OBJECT_MAX_PROPERTY) {
2818                 WARN(1, "Failed to attach object property (type: 0x%x). Please "
2819                         "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
2820                         "you see this message on the same object type.\n",
2821                         obj->type);
2822                 return;
2823         }
2824
2825         obj->properties->ids[count] = property->base.id;
2826         obj->properties->values[count] = init_val;
2827         obj->properties->count++;
2828 }
2829 EXPORT_SYMBOL(drm_object_attach_property);
2830
2831 int drm_object_property_set_value(struct drm_mode_object *obj,
2832                                   struct drm_property *property, uint64_t val)
2833 {
2834         int i;
2835
2836         for (i = 0; i < obj->properties->count; i++) {
2837                 if (obj->properties->ids[i] == property->base.id) {
2838                         obj->properties->values[i] = val;
2839                         return 0;
2840                 }
2841         }
2842
2843         return -EINVAL;
2844 }
2845 EXPORT_SYMBOL(drm_object_property_set_value);
2846
2847 int drm_object_property_get_value(struct drm_mode_object *obj,
2848                                   struct drm_property *property, uint64_t *val)
2849 {
2850         int i;
2851
2852         for (i = 0; i < obj->properties->count; i++) {
2853                 if (obj->properties->ids[i] == property->base.id) {
2854                         *val = obj->properties->values[i];
2855                         return 0;
2856                 }
2857         }
2858
2859         return -EINVAL;
2860 }
2861 EXPORT_SYMBOL(drm_object_property_get_value);
2862
2863 int drm_mode_getproperty_ioctl(struct drm_device *dev,
2864                                void *data, struct drm_file *file_priv)
2865 {
2866         struct drm_mode_object *obj;
2867         struct drm_mode_get_property *out_resp = data;
2868         struct drm_property *property;
2869         int enum_count = 0;
2870         int blob_count = 0;
2871         int value_count = 0;
2872         int ret = 0, i;
2873         int copied;
2874         struct drm_property_enum *prop_enum;
2875         struct drm_mode_property_enum __user *enum_ptr;
2876         struct drm_property_blob *prop_blob;
2877         uint32_t __user *blob_id_ptr;
2878         uint64_t __user *values_ptr;
2879         uint32_t __user *blob_length_ptr;
2880
2881         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2882                 return -EINVAL;
2883
2884         drm_modeset_lock_all(dev);
2885         obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
2886         if (!obj) {
2887                 ret = -EINVAL;
2888                 goto done;
2889         }
2890         property = obj_to_property(obj);
2891
2892         if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
2893                 list_for_each_entry(prop_enum, &property->enum_blob_list, head)
2894                         enum_count++;
2895         } else if (property->flags & DRM_MODE_PROP_BLOB) {
2896                 list_for_each_entry(prop_blob, &property->enum_blob_list, head)
2897                         blob_count++;
2898         }
2899
2900         value_count = property->num_values;
2901
2902         strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
2903         out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
2904         out_resp->flags = property->flags;
2905
2906         if ((out_resp->count_values >= value_count) && value_count) {
2907                 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
2908                 for (i = 0; i < value_count; i++) {
2909                         if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
2910                                 ret = -EFAULT;
2911                                 goto done;
2912                         }
2913                 }
2914         }
2915         out_resp->count_values = value_count;
2916
2917         if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
2918                 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
2919                         copied = 0;
2920                         enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
2921                         list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
2922
2923                                 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
2924                                         ret = -EFAULT;
2925                                         goto done;
2926                                 }
2927
2928                                 if (copy_to_user(&enum_ptr[copied].name,
2929                                                  &prop_enum->name, DRM_PROP_NAME_LEN)) {
2930                                         ret = -EFAULT;
2931                                         goto done;
2932                                 }
2933                                 copied++;
2934                         }
2935                 }
2936                 out_resp->count_enum_blobs = enum_count;
2937         }
2938
2939         if (property->flags & DRM_MODE_PROP_BLOB) {
2940                 if ((out_resp->count_enum_blobs >= blob_count) && blob_count) {
2941                         copied = 0;
2942                         blob_id_ptr = (uint32_t __user *)(unsigned long)out_resp->enum_blob_ptr;
2943                         blob_length_ptr = (uint32_t __user *)(unsigned long)out_resp->values_ptr;
2944
2945                         list_for_each_entry(prop_blob, &property->enum_blob_list, head) {
2946                                 if (put_user(prop_blob->base.id, blob_id_ptr + copied)) {
2947                                         ret = -EFAULT;
2948                                         goto done;
2949                                 }
2950
2951                                 if (put_user(prop_blob->length, blob_length_ptr + copied)) {
2952                                         ret = -EFAULT;
2953                                         goto done;
2954                                 }
2955
2956                                 copied++;
2957                         }
2958                 }
2959                 out_resp->count_enum_blobs = blob_count;
2960         }
2961 done:
2962         drm_modeset_unlock_all(dev);
2963         return ret;
2964 }
2965
2966 static struct drm_property_blob *drm_property_create_blob(struct drm_device *dev, int length,
2967                                                           void *data)
2968 {
2969         struct drm_property_blob *blob;
2970         int ret;
2971
2972         if (!length || !data)
2973                 return NULL;
2974
2975         blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
2976         if (!blob)
2977                 return NULL;
2978
2979         ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
2980         if (ret) {
2981                 kfree(blob);
2982                 return NULL;
2983         }
2984
2985         blob->length = length;
2986
2987         memcpy(blob->data, data, length);
2988
2989         list_add_tail(&blob->head, &dev->mode_config.property_blob_list);
2990         return blob;
2991 }
2992
2993 static void drm_property_destroy_blob(struct drm_device *dev,
2994                                struct drm_property_blob *blob)
2995 {
2996         drm_mode_object_put(dev, &blob->base);
2997         list_del(&blob->head);
2998         kfree(blob);
2999 }
3000
3001 int drm_mode_getblob_ioctl(struct drm_device *dev,
3002                            void *data, struct drm_file *file_priv)
3003 {
3004         struct drm_mode_object *obj;
3005         struct drm_mode_get_blob *out_resp = data;
3006         struct drm_property_blob *blob;
3007         int ret = 0;
3008         void __user *blob_ptr;
3009
3010         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3011                 return -EINVAL;
3012
3013         drm_modeset_lock_all(dev);
3014         obj = drm_mode_object_find(dev, out_resp->blob_id, DRM_MODE_OBJECT_BLOB);
3015         if (!obj) {
3016                 ret = -EINVAL;
3017                 goto done;
3018         }
3019         blob = obj_to_blob(obj);
3020
3021         if (out_resp->length == blob->length) {
3022                 blob_ptr = (void __user *)(unsigned long)out_resp->data;
3023                 if (copy_to_user(blob_ptr, blob->data, blob->length)){
3024                         ret = -EFAULT;
3025                         goto done;
3026                 }
3027         }
3028         out_resp->length = blob->length;
3029
3030 done:
3031         drm_modeset_unlock_all(dev);
3032         return ret;
3033 }
3034
3035 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
3036                                             struct edid *edid)
3037 {
3038         struct drm_device *dev = connector->dev;
3039         int ret, size;
3040
3041         if (connector->edid_blob_ptr)
3042                 drm_property_destroy_blob(dev, connector->edid_blob_ptr);
3043
3044         /* Delete edid, when there is none. */
3045         if (!edid) {
3046                 connector->edid_blob_ptr = NULL;
3047                 ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0);
3048                 return ret;
3049         }
3050
3051         size = EDID_LENGTH * (1 + edid->extensions);
3052         connector->edid_blob_ptr = drm_property_create_blob(connector->dev,
3053                                                             size, edid);
3054         if (!connector->edid_blob_ptr)
3055                 return -EINVAL;
3056
3057         ret = drm_object_property_set_value(&connector->base,
3058                                                dev->mode_config.edid_property,
3059                                                connector->edid_blob_ptr->base.id);
3060
3061         return ret;
3062 }
3063 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
3064
3065 static bool drm_property_change_is_valid(struct drm_property *property,
3066                                          uint64_t value)
3067 {
3068         if (property->flags & DRM_MODE_PROP_IMMUTABLE)
3069                 return false;
3070         if (property->flags & DRM_MODE_PROP_RANGE) {
3071                 if (value < property->values[0] || value > property->values[1])
3072                         return false;
3073                 return true;
3074         } else if (property->flags & DRM_MODE_PROP_BITMASK) {
3075                 int i;
3076                 uint64_t valid_mask = 0;
3077                 for (i = 0; i < property->num_values; i++)
3078                         valid_mask |= (1ULL << property->values[i]);
3079                 return !(value & ~valid_mask);
3080         } else if (property->flags & DRM_MODE_PROP_BLOB) {
3081                 /* Only the driver knows */
3082                 return true;
3083         } else {
3084                 int i;
3085                 for (i = 0; i < property->num_values; i++)
3086                         if (property->values[i] == value)
3087                                 return true;
3088                 return false;
3089         }
3090 }
3091
3092 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
3093                                        void *data, struct drm_file *file_priv)
3094 {
3095         struct drm_mode_connector_set_property *conn_set_prop = data;
3096         struct drm_mode_obj_set_property obj_set_prop = {
3097                 .value = conn_set_prop->value,
3098                 .prop_id = conn_set_prop->prop_id,
3099                 .obj_id = conn_set_prop->connector_id,
3100                 .obj_type = DRM_MODE_OBJECT_CONNECTOR
3101         };
3102
3103         /* It does all the locking and checking we need */
3104         return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
3105 }
3106
3107 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
3108                                            struct drm_property *property,
3109                                            uint64_t value)
3110 {
3111         int ret = -EINVAL;
3112         struct drm_connector *connector = obj_to_connector(obj);
3113
3114         /* Do DPMS ourselves */
3115         if (property == connector->dev->mode_config.dpms_property) {
3116                 if (connector->funcs->dpms)
3117                         (*connector->funcs->dpms)(connector, (int)value);
3118                 ret = 0;
3119         } else if (connector->funcs->set_property)
3120                 ret = connector->funcs->set_property(connector, property, value);
3121
3122         /* store the property value if successful */
3123         if (!ret)
3124                 drm_object_property_set_value(&connector->base, property, value);
3125         return ret;
3126 }
3127
3128 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
3129                                       struct drm_property *property,
3130                                       uint64_t value)
3131 {
3132         int ret = -EINVAL;
3133         struct drm_crtc *crtc = obj_to_crtc(obj);
3134
3135         if (crtc->funcs->set_property)
3136                 ret = crtc->funcs->set_property(crtc, property, value);
3137         if (!ret)
3138                 drm_object_property_set_value(obj, property, value);
3139
3140         return ret;
3141 }
3142
3143 static int drm_mode_plane_set_obj_prop(struct drm_mode_object *obj,
3144                                       struct drm_property *property,
3145                                       uint64_t value)
3146 {
3147         int ret = -EINVAL;
3148         struct drm_plane *plane = obj_to_plane(obj);
3149
3150         if (plane->funcs->set_property)
3151                 ret = plane->funcs->set_property(plane, property, value);
3152         if (!ret)
3153                 drm_object_property_set_value(obj, property, value);
3154
3155         return ret;
3156 }
3157
3158 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
3159                                       struct drm_file *file_priv)
3160 {
3161         struct drm_mode_obj_get_properties *arg = data;
3162         struct drm_mode_object *obj;
3163         int ret = 0;
3164         int i;
3165         int copied = 0;
3166         int props_count = 0;
3167         uint32_t __user *props_ptr;
3168         uint64_t __user *prop_values_ptr;
3169
3170         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3171                 return -EINVAL;
3172
3173         drm_modeset_lock_all(dev);
3174
3175         obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
3176         if (!obj) {
3177                 ret = -EINVAL;
3178                 goto out;
3179         }
3180         if (!obj->properties) {
3181                 ret = -EINVAL;
3182                 goto out;
3183         }
3184
3185         props_count = obj->properties->count;
3186
3187         /* This ioctl is called twice, once to determine how much space is
3188          * needed, and the 2nd time to fill it. */
3189         if ((arg->count_props >= props_count) && props_count) {
3190                 copied = 0;
3191                 props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
3192                 prop_values_ptr = (uint64_t __user *)(unsigned long)
3193                                   (arg->prop_values_ptr);
3194                 for (i = 0; i < props_count; i++) {
3195                         if (put_user(obj->properties->ids[i],
3196                                      props_ptr + copied)) {
3197                                 ret = -EFAULT;
3198                                 goto out;
3199                         }
3200                         if (put_user(obj->properties->values[i],
3201                                      prop_values_ptr + copied)) {
3202                                 ret = -EFAULT;
3203                                 goto out;
3204                         }
3205                         copied++;
3206                 }
3207         }
3208         arg->count_props = props_count;
3209 out:
3210         drm_modeset_unlock_all(dev);
3211         return ret;
3212 }
3213
3214 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
3215                                     struct drm_file *file_priv)
3216 {
3217         struct drm_mode_obj_set_property *arg = data;
3218         struct drm_mode_object *arg_obj;
3219         struct drm_mode_object *prop_obj;
3220         struct drm_property *property;
3221         int ret = -EINVAL;
3222         int i;
3223
3224         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3225                 return -EINVAL;
3226
3227         drm_modeset_lock_all(dev);
3228
3229         arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
3230         if (!arg_obj)
3231                 goto out;
3232         if (!arg_obj->properties)
3233                 goto out;
3234
3235         for (i = 0; i < arg_obj->properties->count; i++)
3236                 if (arg_obj->properties->ids[i] == arg->prop_id)
3237                         break;
3238
3239         if (i == arg_obj->properties->count)
3240                 goto out;
3241
3242         prop_obj = drm_mode_object_find(dev, arg->prop_id,
3243                                         DRM_MODE_OBJECT_PROPERTY);
3244         if (!prop_obj)
3245                 goto out;
3246         property = obj_to_property(prop_obj);
3247
3248         if (!drm_property_change_is_valid(property, arg->value))
3249                 goto out;
3250
3251         switch (arg_obj->type) {
3252         case DRM_MODE_OBJECT_CONNECTOR:
3253                 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
3254                                                       arg->value);
3255                 break;
3256         case DRM_MODE_OBJECT_CRTC:
3257                 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
3258                 break;
3259         case DRM_MODE_OBJECT_PLANE:
3260                 ret = drm_mode_plane_set_obj_prop(arg_obj, property, arg->value);
3261                 break;
3262         }
3263
3264 out:
3265         drm_modeset_unlock_all(dev);
3266         return ret;
3267 }
3268
3269 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
3270                                       struct drm_encoder *encoder)
3271 {
3272         int i;
3273
3274         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
3275                 if (connector->encoder_ids[i] == 0) {
3276                         connector->encoder_ids[i] = encoder->base.id;
3277                         return 0;
3278                 }
3279         }
3280         return -ENOMEM;
3281 }
3282 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
3283
3284 void drm_mode_connector_detach_encoder(struct drm_connector *connector,
3285                                     struct drm_encoder *encoder)
3286 {
3287         int i;
3288         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
3289                 if (connector->encoder_ids[i] == encoder->base.id) {
3290                         connector->encoder_ids[i] = 0;
3291                         if (connector->encoder == encoder)
3292                                 connector->encoder = NULL;
3293                         break;
3294                 }
3295         }
3296 }
3297 EXPORT_SYMBOL(drm_mode_connector_detach_encoder);
3298
3299 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
3300                                   int gamma_size)
3301 {
3302         crtc->gamma_size = gamma_size;
3303
3304         crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL);
3305         if (!crtc->gamma_store) {
3306                 crtc->gamma_size = 0;
3307                 return -ENOMEM;
3308         }
3309
3310         return 0;
3311 }
3312 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
3313
3314 int drm_mode_gamma_set_ioctl(struct drm_device *dev,
3315                              void *data, struct drm_file *file_priv)
3316 {
3317         struct drm_mode_crtc_lut *crtc_lut = data;
3318         struct drm_mode_object *obj;
3319         struct drm_crtc *crtc;
3320         void *r_base, *g_base, *b_base;
3321         int size;
3322         int ret = 0;
3323
3324         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3325                 return -EINVAL;
3326
3327         drm_modeset_lock_all(dev);
3328         obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
3329         if (!obj) {
3330                 ret = -EINVAL;
3331                 goto out;
3332         }
3333         crtc = obj_to_crtc(obj);
3334
3335         if (crtc->funcs->gamma_set == NULL) {
3336                 ret = -ENOSYS;
3337                 goto out;
3338         }
3339
3340         /* memcpy into gamma store */
3341         if (crtc_lut->gamma_size != crtc->gamma_size) {
3342                 ret = -EINVAL;
3343                 goto out;
3344         }
3345
3346         size = crtc_lut->gamma_size * (sizeof(uint16_t));
3347         r_base = crtc->gamma_store;
3348         if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
3349                 ret = -EFAULT;
3350                 goto out;
3351         }
3352
3353         g_base = r_base + size;
3354         if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
3355                 ret = -EFAULT;
3356                 goto out;
3357         }
3358
3359         b_base = g_base + size;
3360         if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
3361                 ret = -EFAULT;
3362                 goto out;
3363         }
3364
3365         crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
3366
3367 out:
3368         drm_modeset_unlock_all(dev);
3369         return ret;
3370
3371 }
3372
3373 int drm_mode_gamma_get_ioctl(struct drm_device *dev,
3374                              void *data, struct drm_file *file_priv)
3375 {
3376         struct drm_mode_crtc_lut *crtc_lut = data;
3377         struct drm_mode_object *obj;
3378         struct drm_crtc *crtc;
3379         void *r_base, *g_base, *b_base;
3380         int size;
3381         int ret = 0;
3382
3383         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3384                 return -EINVAL;
3385
3386         drm_modeset_lock_all(dev);
3387         obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
3388         if (!obj) {
3389                 ret = -EINVAL;
3390                 goto out;
3391         }
3392         crtc = obj_to_crtc(obj);
3393
3394         /* memcpy into gamma store */
3395         if (crtc_lut->gamma_size != crtc->gamma_size) {
3396                 ret = -EINVAL;
3397                 goto out;
3398         }
3399
3400         size = crtc_lut->gamma_size * (sizeof(uint16_t));
3401         r_base = crtc->gamma_store;
3402         if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
3403                 ret = -EFAULT;
3404                 goto out;
3405         }
3406
3407         g_base = r_base + size;
3408         if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
3409                 ret = -EFAULT;
3410                 goto out;
3411         }
3412
3413         b_base = g_base + size;
3414         if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
3415                 ret = -EFAULT;
3416                 goto out;
3417         }
3418 out:
3419         drm_modeset_unlock_all(dev);
3420         return ret;
3421 }
3422
3423 int drm_mode_page_flip_ioctl(struct drm_device *dev,
3424                              void *data, struct drm_file *file_priv)
3425 {
3426         struct drm_mode_crtc_page_flip *page_flip = data;
3427         struct drm_mode_object *obj;
3428         struct drm_crtc *crtc;
3429         struct drm_framebuffer *fb = NULL, *old_fb = NULL;
3430         struct drm_pending_vblank_event *e = NULL;
3431         unsigned long flags;
3432         int hdisplay, vdisplay;
3433         int ret = -EINVAL;
3434
3435         if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
3436             page_flip->reserved != 0)
3437                 return -EINVAL;
3438
3439         obj = drm_mode_object_find(dev, page_flip->crtc_id, DRM_MODE_OBJECT_CRTC);
3440         if (!obj)
3441                 return -EINVAL;
3442         crtc = obj_to_crtc(obj);
3443
3444         mutex_lock(&crtc->mutex);
3445         if (crtc->fb == NULL) {
3446                 /* The framebuffer is currently unbound, presumably
3447                  * due to a hotplug event, that userspace has not
3448                  * yet discovered.
3449                  */
3450                 ret = -EBUSY;
3451                 goto out;
3452         }
3453
3454         if (crtc->funcs->page_flip == NULL)
3455                 goto out;
3456
3457         fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
3458         if (!fb)
3459                 goto out;
3460
3461         hdisplay = crtc->mode.hdisplay;
3462         vdisplay = crtc->mode.vdisplay;
3463
3464         if (crtc->invert_dimensions)
3465                 swap(hdisplay, vdisplay);
3466
3467         if (hdisplay > fb->width ||
3468             vdisplay > fb->height ||
3469             crtc->x > fb->width - hdisplay ||
3470             crtc->y > fb->height - vdisplay) {
3471                 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n",
3472                               fb->width, fb->height, hdisplay, vdisplay, crtc->x, crtc->y,
3473                               crtc->invert_dimensions ? " (inverted)" : "");
3474                 ret = -ENOSPC;
3475                 goto out;
3476         }
3477
3478         if (crtc->fb->pixel_format != fb->pixel_format) {
3479                 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
3480                 ret = -EINVAL;
3481                 goto out;
3482         }
3483
3484         if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
3485                 ret = -ENOMEM;
3486                 spin_lock_irqsave(&dev->event_lock, flags);
3487                 if (file_priv->event_space < sizeof e->event) {
3488                         spin_unlock_irqrestore(&dev->event_lock, flags);
3489                         goto out;
3490                 }
3491                 file_priv->event_space -= sizeof e->event;
3492                 spin_unlock_irqrestore(&dev->event_lock, flags);
3493
3494                 e = kzalloc(sizeof *e, GFP_KERNEL);
3495                 if (e == NULL) {
3496                         spin_lock_irqsave(&dev->event_lock, flags);
3497                         file_priv->event_space += sizeof e->event;
3498                         spin_unlock_irqrestore(&dev->event_lock, flags);
3499                         goto out;
3500                 }
3501
3502                 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
3503                 e->event.base.length = sizeof e->event;
3504                 e->event.user_data = page_flip->user_data;
3505                 e->base.event = &e->event.base;
3506                 e->base.file_priv = file_priv;
3507                 e->base.destroy =
3508                         (void (*) (struct drm_pending_event *)) kfree;
3509         }
3510
3511         old_fb = crtc->fb;
3512         ret = crtc->funcs->page_flip(crtc, fb, e);
3513         if (ret) {
3514                 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
3515                         spin_lock_irqsave(&dev->event_lock, flags);
3516                         file_priv->event_space += sizeof e->event;
3517                         spin_unlock_irqrestore(&dev->event_lock, flags);
3518                         kfree(e);
3519                 }
3520                 /* Keep the old fb, don't unref it. */
3521                 old_fb = NULL;
3522         } else {
3523                 /*
3524                  * Warn if the driver hasn't properly updated the crtc->fb
3525                  * field to reflect that the new framebuffer is now used.
3526                  * Failing to do so will screw with the reference counting
3527                  * on framebuffers.
3528                  */
3529                 WARN_ON(crtc->fb != fb);
3530                 /* Unref only the old framebuffer. */
3531                 fb = NULL;
3532         }
3533
3534 out:
3535         if (fb)
3536                 drm_framebuffer_unreference(fb);
3537         if (old_fb)
3538                 drm_framebuffer_unreference(old_fb);
3539         mutex_unlock(&crtc->mutex);
3540
3541         return ret;
3542 }
3543
3544 void drm_mode_config_reset(struct drm_device *dev)
3545 {
3546         struct drm_crtc *crtc;
3547         struct drm_encoder *encoder;
3548         struct drm_connector *connector;
3549
3550         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
3551                 if (crtc->funcs->reset)
3552                         crtc->funcs->reset(crtc);
3553
3554         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
3555                 if (encoder->funcs->reset)
3556                         encoder->funcs->reset(encoder);
3557
3558         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
3559                 connector->status = connector_status_unknown;
3560
3561                 if (connector->funcs->reset)
3562                         connector->funcs->reset(connector);
3563         }
3564 }
3565 EXPORT_SYMBOL(drm_mode_config_reset);
3566
3567 int drm_mode_create_dumb_ioctl(struct drm_device *dev,
3568                                void *data, struct drm_file *file_priv)
3569 {
3570         struct drm_mode_create_dumb *args = data;
3571
3572         if (!dev->driver->dumb_create)
3573                 return -ENOSYS;
3574         return dev->driver->dumb_create(file_priv, dev, args);
3575 }
3576
3577 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
3578                              void *data, struct drm_file *file_priv)
3579 {
3580         struct drm_mode_map_dumb *args = data;
3581
3582         /* call driver ioctl to get mmap offset */
3583         if (!dev->driver->dumb_map_offset)
3584                 return -ENOSYS;
3585
3586         return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
3587 }
3588
3589 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
3590                                 void *data, struct drm_file *file_priv)
3591 {
3592         struct drm_mode_destroy_dumb *args = data;
3593
3594         if (!dev->driver->dumb_destroy)
3595                 return -ENOSYS;
3596
3597         return dev->driver->dumb_destroy(file_priv, dev, args->handle);
3598 }
3599
3600 /*
3601  * Just need to support RGB formats here for compat with code that doesn't
3602  * use pixel formats directly yet.
3603  */
3604 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
3605                           int *bpp)
3606 {
3607         switch (format) {
3608         case DRM_FORMAT_C8:
3609         case DRM_FORMAT_RGB332:
3610         case DRM_FORMAT_BGR233:
3611                 *depth = 8;
3612                 *bpp = 8;
3613                 break;
3614         case DRM_FORMAT_XRGB1555:
3615         case DRM_FORMAT_XBGR1555:
3616         case DRM_FORMAT_RGBX5551:
3617         case DRM_FORMAT_BGRX5551:
3618         case DRM_FORMAT_ARGB1555:
3619         case DRM_FORMAT_ABGR1555:
3620         case DRM_FORMAT_RGBA5551:
3621         case DRM_FORMAT_BGRA5551:
3622                 *depth = 15;
3623                 *bpp = 16;
3624                 break;
3625         case DRM_FORMAT_RGB565:
3626         case DRM_FORMAT_BGR565:
3627                 *depth = 16;
3628                 *bpp = 16;
3629                 break;
3630         case DRM_FORMAT_RGB888:
3631         case DRM_FORMAT_BGR888:
3632                 *depth = 24;
3633                 *bpp = 24;
3634                 break;
3635         case DRM_FORMAT_XRGB8888:
3636         case DRM_FORMAT_XBGR8888:
3637         case DRM_FORMAT_RGBX8888:
3638         case DRM_FORMAT_BGRX8888:
3639                 *depth = 24;
3640                 *bpp = 32;
3641                 break;
3642         case DRM_FORMAT_XRGB2101010:
3643         case DRM_FORMAT_XBGR2101010:
3644         case DRM_FORMAT_RGBX1010102:
3645         case DRM_FORMAT_BGRX1010102:
3646         case DRM_FORMAT_ARGB2101010:
3647         case DRM_FORMAT_ABGR2101010:
3648         case DRM_FORMAT_RGBA1010102:
3649         case DRM_FORMAT_BGRA1010102:
3650                 *depth = 30;
3651                 *bpp = 32;
3652                 break;
3653         case DRM_FORMAT_ARGB8888:
3654         case DRM_FORMAT_ABGR8888:
3655         case DRM_FORMAT_RGBA8888:
3656         case DRM_FORMAT_BGRA8888:
3657                 *depth = 32;
3658                 *bpp = 32;
3659                 break;
3660         default:
3661                 DRM_DEBUG_KMS("unsupported pixel format\n");
3662                 *depth = 0;
3663                 *bpp = 0;
3664                 break;
3665         }
3666 }
3667 EXPORT_SYMBOL(drm_fb_get_bpp_depth);
3668
3669 /**
3670  * drm_format_num_planes - get the number of planes for format
3671  * @format: pixel format (DRM_FORMAT_*)
3672  *
3673  * RETURNS:
3674  * The number of planes used by the specified pixel format.
3675  */
3676 int drm_format_num_planes(uint32_t format)
3677 {
3678         switch (format) {
3679         case DRM_FORMAT_YUV410:
3680         case DRM_FORMAT_YVU410:
3681         case DRM_FORMAT_YUV411:
3682         case DRM_FORMAT_YVU411:
3683         case DRM_FORMAT_YUV420:
3684         case DRM_FORMAT_YVU420:
3685         case DRM_FORMAT_YUV422:
3686         case DRM_FORMAT_YVU422:
3687         case DRM_FORMAT_YUV444:
3688         case DRM_FORMAT_YVU444:
3689                 return 3;
3690         case DRM_FORMAT_NV12:
3691         case DRM_FORMAT_NV21:
3692         case DRM_FORMAT_NV16:
3693         case DRM_FORMAT_NV61:
3694         case DRM_FORMAT_NV24:
3695         case DRM_FORMAT_NV42:
3696                 return 2;
3697         default:
3698                 return 1;
3699         }
3700 }
3701 EXPORT_SYMBOL(drm_format_num_planes);
3702
3703 /**
3704  * drm_format_plane_cpp - determine the bytes per pixel value
3705  * @format: pixel format (DRM_FORMAT_*)
3706  * @plane: plane index
3707  *
3708  * RETURNS:
3709  * The bytes per pixel value for the specified plane.
3710  */
3711 int drm_format_plane_cpp(uint32_t format, int plane)
3712 {
3713         unsigned int depth;
3714         int bpp;
3715
3716         if (plane >= drm_format_num_planes(format))
3717                 return 0;
3718
3719         switch (format) {
3720         case DRM_FORMAT_YUYV:
3721         case DRM_FORMAT_YVYU:
3722         case DRM_FORMAT_UYVY:
3723         case DRM_FORMAT_VYUY:
3724                 return 2;
3725         case DRM_FORMAT_NV12:
3726         case DRM_FORMAT_NV21:
3727         case DRM_FORMAT_NV16:
3728         case DRM_FORMAT_NV61:
3729         case DRM_FORMAT_NV24:
3730         case DRM_FORMAT_NV42:
3731                 return plane ? 2 : 1;
3732         case DRM_FORMAT_YUV410:
3733         case DRM_FORMAT_YVU410:
3734         case DRM_FORMAT_YUV411:
3735         case DRM_FORMAT_YVU411:
3736         case DRM_FORMAT_YUV420:
3737         case DRM_FORMAT_YVU420:
3738         case DRM_FORMAT_YUV422:
3739         case DRM_FORMAT_YVU422:
3740         case DRM_FORMAT_YUV444:
3741         case DRM_FORMAT_YVU444:
3742                 return 1;
3743         default:
3744                 drm_fb_get_bpp_depth(format, &depth, &bpp);
3745                 return bpp >> 3;
3746         }
3747 }
3748 EXPORT_SYMBOL(drm_format_plane_cpp);
3749
3750 /**
3751  * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
3752  * @format: pixel format (DRM_FORMAT_*)
3753  *
3754  * RETURNS:
3755  * The horizontal chroma subsampling factor for the
3756  * specified pixel format.
3757  */
3758 int drm_format_horz_chroma_subsampling(uint32_t format)
3759 {
3760         switch (format) {
3761         case DRM_FORMAT_YUV411:
3762         case DRM_FORMAT_YVU411:
3763         case DRM_FORMAT_YUV410:
3764         case DRM_FORMAT_YVU410:
3765                 return 4;
3766         case DRM_FORMAT_YUYV:
3767         case DRM_FORMAT_YVYU:
3768         case DRM_FORMAT_UYVY:
3769         case DRM_FORMAT_VYUY:
3770         case DRM_FORMAT_NV12:
3771         case DRM_FORMAT_NV21:
3772         case DRM_FORMAT_NV16:
3773         case DRM_FORMAT_NV61:
3774         case DRM_FORMAT_YUV422:
3775         case DRM_FORMAT_YVU422:
3776         case DRM_FORMAT_YUV420:
3777         case DRM_FORMAT_YVU420:
3778                 return 2;
3779         default:
3780                 return 1;
3781         }
3782 }
3783 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
3784
3785 /**
3786  * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
3787  * @format: pixel format (DRM_FORMAT_*)
3788  *
3789  * RETURNS:
3790  * The vertical chroma subsampling factor for the
3791  * specified pixel format.
3792  */
3793 int drm_format_vert_chroma_subsampling(uint32_t format)
3794 {
3795         switch (format) {
3796         case DRM_FORMAT_YUV410:
3797         case DRM_FORMAT_YVU410:
3798                 return 4;
3799         case DRM_FORMAT_YUV420:
3800         case DRM_FORMAT_YVU420:
3801         case DRM_FORMAT_NV12:
3802         case DRM_FORMAT_NV21:
3803                 return 2;
3804         default:
3805                 return 1;
3806         }
3807 }
3808 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
3809
3810 /**
3811  * drm_mode_config_init - initialize DRM mode_configuration structure
3812  * @dev: DRM device
3813  *
3814  * Initialize @dev's mode_config structure, used for tracking the graphics
3815  * configuration of @dev.
3816  *
3817  * Since this initializes the modeset locks, no locking is possible. Which is no
3818  * problem, since this should happen single threaded at init time. It is the
3819  * driver's problem to ensure this guarantee.
3820  *
3821  */
3822 void drm_mode_config_init(struct drm_device *dev)
3823 {
3824         mutex_init(&dev->mode_config.mutex);
3825         mutex_init(&dev->mode_config.idr_mutex);
3826         mutex_init(&dev->mode_config.fb_lock);
3827         INIT_LIST_HEAD(&dev->mode_config.fb_list);
3828         INIT_LIST_HEAD(&dev->mode_config.crtc_list);
3829         INIT_LIST_HEAD(&dev->mode_config.connector_list);
3830         INIT_LIST_HEAD(&dev->mode_config.encoder_list);
3831         INIT_LIST_HEAD(&dev->mode_config.property_list);
3832         INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
3833         INIT_LIST_HEAD(&dev->mode_config.plane_list);
3834         idr_init(&dev->mode_config.crtc_idr);
3835
3836         drm_modeset_lock_all(dev);
3837         drm_mode_create_standard_connector_properties(dev);
3838         drm_modeset_unlock_all(dev);
3839
3840         /* Just to be sure */
3841         dev->mode_config.num_fb = 0;
3842         dev->mode_config.num_connector = 0;
3843         dev->mode_config.num_crtc = 0;
3844         dev->mode_config.num_encoder = 0;
3845 }
3846 EXPORT_SYMBOL(drm_mode_config_init);
3847
3848 /**
3849  * drm_mode_config_cleanup - free up DRM mode_config info
3850  * @dev: DRM device
3851  *
3852  * Free up all the connectors and CRTCs associated with this DRM device, then
3853  * free up the framebuffers and associated buffer objects.
3854  *
3855  * Note that since this /should/ happen single-threaded at driver/device
3856  * teardown time, no locking is required. It's the driver's job to ensure that
3857  * this guarantee actually holds true.
3858  *
3859  * FIXME: cleanup any dangling user buffer objects too
3860  */
3861 void drm_mode_config_cleanup(struct drm_device *dev)
3862 {
3863         struct drm_connector *connector, *ot;
3864         struct drm_crtc *crtc, *ct;
3865         struct drm_encoder *encoder, *enct;
3866         struct drm_framebuffer *fb, *fbt;
3867         struct drm_property *property, *pt;
3868         struct drm_property_blob *blob, *bt;
3869         struct drm_plane *plane, *plt;
3870
3871         list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
3872                                  head) {
3873                 encoder->funcs->destroy(encoder);
3874         }
3875
3876         list_for_each_entry_safe(connector, ot,
3877                                  &dev->mode_config.connector_list, head) {
3878                 connector->funcs->destroy(connector);
3879         }
3880
3881         list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
3882                                  head) {
3883                 drm_property_destroy(dev, property);
3884         }
3885
3886         list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
3887                                  head) {
3888                 drm_property_destroy_blob(dev, blob);
3889         }
3890
3891         /*
3892          * Single-threaded teardown context, so it's not required to grab the
3893          * fb_lock to protect against concurrent fb_list access. Contrary, it
3894          * would actually deadlock with the drm_framebuffer_cleanup function.
3895          *
3896          * Also, if there are any framebuffers left, that's a driver leak now,
3897          * so politely WARN about this.
3898          */
3899         WARN_ON(!list_empty(&dev->mode_config.fb_list));
3900         list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
3901                 drm_framebuffer_remove(fb);
3902         }
3903
3904         list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
3905                                  head) {
3906                 plane->funcs->destroy(plane);
3907         }
3908
3909         list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
3910                 crtc->funcs->destroy(crtc);
3911         }
3912
3913         idr_destroy(&dev->mode_config.crtc_idr);
3914 }
3915 EXPORT_SYMBOL(drm_mode_config_cleanup);