xf86drmMode.c

   1 /*
   2  * \file xf86drmMode.c
   3  * Header for DRM modesetting interface.
   4  *
   5  * \author Jakob Bornecrantz <wallbraker@gmail.com>
   6  *
   7  * \par Acknowledgements:
   8  * Feb 2007, Dave Airlie <airlied@linux.ie>
   9  */
  10
  11 /*
  12  * Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
  13  * Copyright (c) 2007-2008 Dave Airlie <airlied@linux.ie>
  14  * Copyright (c) 2007-2008 Jakob Bornecrantz <wallbraker@gmail.com>
  15  *
  16  * Permission is hereby granted, free of charge, to any person obtaining a
  17  * copy of this software and associated documentation files (the "Software"),
  18  * to deal in the Software without restriction, including without limitation
  19  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  20  * and/or sell copies of the Software, and to permit persons to whom the
  21  * Software is furnished to do so, subject to the following conditions:
  22  *
  23  * The above copyright notice and this permission notice shall be included in
  24  * all copies or substantial portions of the Software.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  27  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  28  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  29  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  30  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  31  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  32  * IN THE SOFTWARE.
  33  *
  34  */
  35
  36 /*
  37  * TODO the types we are after are defined in different headers on different
  38  * platforms find which headers to include to get uint32_t
  39  */
  40
  41 #ifdef HAVE_CONFIG_H
  42 #include "config.h"
  43 #endif
  44
  45 #include <limits.h>
  46 #include <stdint.h>
  47 #include <stdlib.h>
  48 #include <sys/ioctl.h>
  49 #ifdef HAVE_SYS_SYSCTL_H
  50 #include <sys/sysctl.h>
  51 #endif
  52 #include <stdio.h>
  53 #include <stdbool.h>
  54
  55 #include "xf86drmMode.h"
  56 #include "xf86drm.h"
  57 #include <drm.h>
  58 #include <string.h>
  59 #include <dirent.h>
  60 #include <unistd.h>
  61 #include <errno.h>
  62
  63 #define memclear(s) memset(&s, 0, sizeof(s))
  64
  65 #define U642VOID(x) ((void *)(unsigned long)(x))
  66 #define VOID2U64(x) ((uint64_t)(unsigned long)(x))
  67
  68 static inline int DRM_IOCTL(int fd, unsigned long cmd, void *arg)
  69 {
  70         int ret = drmIoctl(fd, cmd, arg);
  71         return ret < 0 ? -errno : ret;
  72 }
  73
  74 /*
  75  * Util functions
  76  */
  77
  78 static void* drmAllocCpy(char *array, int count, int entry_size)
  79 {
  80         char *r;
  81         int i;
  82
  83         if (!count || !array || !entry_size)
  84                 return 0;
  85
  86         if (!(r = drmMalloc(count*entry_size)))
  87                 return 0;
  88
  89         for (i = 0; i < count; i++)
  90                 memcpy(r+(entry_size*i), array+(entry_size*i), entry_size);
  91
  92         return r;
  93 }
  94
  95 /*
  96  * A couple of free functions.
  97  */
  98
  99 void drmModeFreeModeInfo(drmModeModeInfoPtr ptr)
 100 {
 101         if (!ptr)
 102                 return;
 103
 104         drmFree(ptr);
 105 }
 106
 107 void drmModeFreeResources(drmModeResPtr ptr)
 108 {
 109         if (!ptr)
 110                 return;
 111
 112         drmFree(ptr->fbs);
 113         drmFree(ptr->crtcs);
 114         drmFree(ptr->connectors);
 115         drmFree(ptr->encoders);
 116         drmFree(ptr);
 117 }
 118
 119 void drmModeFreeFB(drmModeFBPtr ptr)
 120 {
 121         if (!ptr)
 122                 return;
 123
 124         /* we might add more frees later. */
 125         drmFree(ptr);
 126 }
 127
 128 void drmModeFreeCrtc(drmModeCrtcPtr ptr)
 129 {
 130         if (!ptr)
 131                 return;
 132
 133         drmFree(ptr);
 134 }
 135
 136 void drmModeFreeConnector(drmModeConnectorPtr ptr)
 137 {
 138         if (!ptr)
 139                 return;
 140
 141         drmFree(ptr->encoders);
 142         drmFree(ptr->prop_values);
 143         drmFree(ptr->props);
 144         drmFree(ptr->modes);
 145         drmFree(ptr);
 146 }
 147
 148 void drmModeFreeEncoder(drmModeEncoderPtr ptr)
 149 {
 150         drmFree(ptr);
 151 }
 152
 153 /*
 154  * ModeSetting functions.
 155  */
 156
 157 drmModeResPtr drmModeGetResources(int fd)
 158 {
 159         struct drm_mode_card_res res, counts;
 160         drmModeResPtr r = 0;
 161
 162 retry:
 163         memclear(res);
 164         if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res))
 165                 return 0;
 166
 167         counts = res;
 168
 169         if (res.count_fbs) {
 170                 res.fb_id_ptr = VOID2U64(drmMalloc(res.count_fbs*sizeof(uint32_t)));
 171                 if (!res.fb_id_ptr)
 172                         goto err_allocs;
 173         }
 174         if (res.count_crtcs) {
 175                 res.crtc_id_ptr = VOID2U64(drmMalloc(res.count_crtcs*sizeof(uint32_t)));
 176                 if (!res.crtc_id_ptr)
 177                         goto err_allocs;
 178         }
 179         if (res.count_connectors) {
 180                 res.connector_id_ptr = VOID2U64(drmMalloc(res.count_connectors*sizeof(uint32_t)));
 181                 if (!res.connector_id_ptr)
 182                         goto err_allocs;
 183         }
 184         if (res.count_encoders) {
 185                 res.encoder_id_ptr = VOID2U64(drmMalloc(res.count_encoders*sizeof(uint32_t)));
 186                 if (!res.encoder_id_ptr)
 187                         goto err_allocs;
 188         }
 189
 190         if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res))
 191                 goto err_allocs;
 192
 193         /* The number of available connectors and etc may have changed with a
 194          * hotplug event in between the ioctls, in which case the field is
 195          * silently ignored by the kernel.
 196          */
 197         if (counts.count_fbs < res.count_fbs ||
 198             counts.count_crtcs < res.count_crtcs ||
 199             counts.count_connectors < res.count_connectors ||
 200             counts.count_encoders < res.count_encoders)
 201         {
 202                 drmFree(U642VOID(res.fb_id_ptr));
 203                 drmFree(U642VOID(res.crtc_id_ptr));
 204                 drmFree(U642VOID(res.connector_id_ptr));
 205                 drmFree(U642VOID(res.encoder_id_ptr));
 206
 207                 goto retry;
 208         }
 209
 210         /*
 211          * return
 212          */
 213         if (!(r = drmMalloc(sizeof(*r))))
 214                 goto err_allocs;
 215
 216         r->min_width     = res.min_width;
 217         r->max_width     = res.max_width;
 218         r->min_height    = res.min_height;
 219         r->max_height    = res.max_height;
 220         r->count_fbs     = res.count_fbs;
 221         r->count_crtcs   = res.count_crtcs;
 222         r->count_connectors = res.count_connectors;
 223         r->count_encoders = res.count_encoders;
 224
 225         r->fbs        = drmAllocCpy(U642VOID(res.fb_id_ptr), res.count_fbs, sizeof(uint32_t));
 226         r->crtcs      = drmAllocCpy(U642VOID(res.crtc_id_ptr), res.count_crtcs, sizeof(uint32_t));
 227         r->connectors = drmAllocCpy(U642VOID(res.connector_id_ptr), res.count_connectors, sizeof(uint32_t));
 228         r->encoders   = drmAllocCpy(U642VOID(res.encoder_id_ptr), res.count_encoders, sizeof(uint32_t));
 229         if ((res.count_fbs && !r->fbs) ||
 230             (res.count_crtcs && !r->crtcs) ||
 231             (res.count_connectors && !r->connectors) ||
 232             (res.count_encoders && !r->encoders))
 233         {
 234                 drmFree(r->fbs);
 235                 drmFree(r->crtcs);
 236                 drmFree(r->connectors);
 237                 drmFree(r->encoders);
 238                 drmFree(r);
 239                 r = 0;
 240         }
 241
 242 err_allocs:
 243         drmFree(U642VOID(res.fb_id_ptr));
 244         drmFree(U642VOID(res.crtc_id_ptr));
 245         drmFree(U642VOID(res.connector_id_ptr));
 246         drmFree(U642VOID(res.encoder_id_ptr));
 247
 248         return r;
 249 }
 250
 251 int drmModeAddFB(int fd, uint32_t width, uint32_t height, uint8_t depth,
 252                  uint8_t bpp, uint32_t pitch, uint32_t bo_handle,
 253                  uint32_t *buf_id)
 254 {
 255         struct drm_mode_fb_cmd f;
 256         int ret;
 257
 258         memclear(f);
 259         f.width  = width;
 260         f.height = height;
 261         f.pitch  = pitch;
 262         f.bpp    = bpp;
 263         f.depth  = depth;
 264         f.handle = bo_handle;
 265
 266         if ((ret = DRM_IOCTL(fd, DRM_IOCTL_MODE_ADDFB, &f)))
 267                 return ret;
 268
 269         *buf_id = f.fb_id;
 270         return 0;
 271 }
 272
 273 int drmModeAddFB2WithModifiers(int fd, uint32_t width, uint32_t height,
 274                                uint32_t pixel_format, uint32_t bo_handles[4],
 275                                uint32_t pitches[4], uint32_t offsets[4],
 276                                uint64_t modifier[4], uint32_t *buf_id, uint32_t flags)
 277 {
 278         struct drm_mode_fb_cmd2 f;
 279         int ret;
 280
 281         memclear(f);
 282         f.width  = width;
 283         f.height = height;
 284         f.pixel_format = pixel_format;
 285         f.flags = flags;
 286         memcpy(f.handles, bo_handles, 4 * sizeof(bo_handles[0]));
 287         memcpy(f.pitches, pitches, 4 * sizeof(pitches[0]));
 288         memcpy(f.offsets, offsets, 4 * sizeof(offsets[0]));
 289         if (modifier)
 290                 memcpy(f.modifier, modifier, 4 * sizeof(modifier[0]));
 291
 292         if ((ret = DRM_IOCTL(fd, DRM_IOCTL_MODE_ADDFB2, &f)))
 293                 return ret;
 294
 295         *buf_id = f.fb_id;
 296         return 0;
 297 }
 298
 299 int drmModeAddFB2(int fd, uint32_t width, uint32_t height,
 300                   uint32_t pixel_format, uint32_t bo_handles[4],
 301                   uint32_t pitches[4], uint32_t offsets[4],
 302                   uint32_t *buf_id, uint32_t flags)
 303 {
 304         return drmModeAddFB2WithModifiers(fd, width, height,
 305                                           pixel_format, bo_handles,
 306                                           pitches, offsets, NULL,
 307                                           buf_id, flags);
 308 }
 309
 310 int drmModeRmFB(int fd, uint32_t bufferId)
 311 {
 312         return DRM_IOCTL(fd, DRM_IOCTL_MODE_RMFB, &bufferId);
 313 }
 314
 315 drmModeFBPtr drmModeGetFB(int fd, uint32_t buf)
 316 {
 317         struct drm_mode_fb_cmd info;
 318         drmModeFBPtr r;
 319
 320         memclear(info);
 321         info.fb_id = buf;
 322
 323         if (drmIoctl(fd, DRM_IOCTL_MODE_GETFB, &info))
 324                 return NULL;
 325
 326         if (!(r = drmMalloc(sizeof(*r))))
 327                 return NULL;
 328
 329         r->fb_id = info.fb_id;
 330         r->width = info.width;
 331         r->height = info.height;
 332         r->pitch = info.pitch;
 333         r->bpp = info.bpp;
 334         r->handle = info.handle;
 335         r->depth = info.depth;
 336
 337         return r;
 338 }
 339
 340 int drmModeDirtyFB(int fd, uint32_t bufferId,
 341                    drmModeClipPtr clips, uint32_t num_clips)
 342 {
 343         struct drm_mode_fb_dirty_cmd dirty;
 344
 345         memclear(dirty);
 346         dirty.fb_id = bufferId;
 347         dirty.clips_ptr = VOID2U64(clips);
 348         dirty.num_clips = num_clips;
 349
 350         return DRM_IOCTL(fd, DRM_IOCTL_MODE_DIRTYFB, &dirty);
 351 }
 352
 353 /*
 354  * Crtc functions
 355  */
 356
 357 drmModeCrtcPtr drmModeGetCrtc(int fd, uint32_t crtcId)
 358 {
 359         struct drm_mode_crtc crtc;
 360         drmModeCrtcPtr r;
 361
 362         memclear(crtc);
 363         crtc.crtc_id = crtcId;
 364
 365         if (drmIoctl(fd, DRM_IOCTL_MODE_GETCRTC, &crtc))
 366                 return 0;
 367
 368         /*
 369          * return
 370          */
 371
 372         if (!(r = drmMalloc(sizeof(*r))))
 373                 return 0;
 374
 375         r->crtc_id         = crtc.crtc_id;
 376         r->x               = crtc.x;
 377         r->y               = crtc.y;
 378         r->mode_valid      = crtc.mode_valid;
 379         if (r->mode_valid) {
 380                 memcpy(&r->mode, &crtc.mode, sizeof(struct drm_mode_modeinfo));
 381                 r->width = crtc.mode.hdisplay;
 382                 r->height = crtc.mode.vdisplay;
 383         }
 384         r->buffer_id       = crtc.fb_id;
 385         r->gamma_size      = crtc.gamma_size;
 386         return r;
 387 }
 388
 389 int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId,
 390                    uint32_t x, uint32_t y, uint32_t *connectors, int count,
 391                    drmModeModeInfoPtr mode)
 392 {
 393         struct drm_mode_crtc crtc;
 394
 395         memclear(crtc);
 396         crtc.x             = x;
 397         crtc.y             = y;
 398         crtc.crtc_id       = crtcId;
 399         crtc.fb_id         = bufferId;
 400         crtc.set_connectors_ptr = VOID2U64(connectors);
 401         crtc.count_connectors = count;
 402         if (mode) {
 403           memcpy(&crtc.mode, mode, sizeof(struct drm_mode_modeinfo));
 404           crtc.mode_valid = 1;
 405         }
 406
 407         return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETCRTC, &crtc);
 408 }
 409
 410 /*
 411  * Cursor manipulation
 412  */
 413
 414 int drmModeSetCursor(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t width, uint32_t height)
 415 {
 416         struct drm_mode_cursor arg;
 417
 418         memclear(arg);
 419         arg.flags = DRM_MODE_CURSOR_BO;
 420         arg.crtc_id = crtcId;
 421         arg.width = width;
 422         arg.height = height;
 423         arg.handle = bo_handle;
 424
 425         return DRM_IOCTL(fd, DRM_IOCTL_MODE_CURSOR, &arg);
 426 }
 427
 428 int drmModeSetCursor2(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t width, uint32_t height, int32_t hot_x, int32_t hot_y)
 429 {
 430         struct drm_mode_cursor2 arg;
 431
 432         memclear(arg);
 433         arg.flags = DRM_MODE_CURSOR_BO;
 434         arg.crtc_id = crtcId;
 435         arg.width = width;
 436         arg.height = height;
 437         arg.handle = bo_handle;
 438         arg.hot_x = hot_x;
 439         arg.hot_y = hot_y;
 440
 441         return DRM_IOCTL(fd, DRM_IOCTL_MODE_CURSOR2, &arg);
 442 }
 443
 444 int drmModeMoveCursor(int fd, uint32_t crtcId, int x, int y)
 445 {
 446         struct drm_mode_cursor arg;
 447
 448         memclear(arg);
 449         arg.flags = DRM_MODE_CURSOR_MOVE;
 450         arg.crtc_id = crtcId;
 451         arg.x = x;
 452         arg.y = y;
 453
 454         return DRM_IOCTL(fd, DRM_IOCTL_MODE_CURSOR, &arg);
 455 }
 456
 457 /*
 458  * Encoder get
 459  */
 460 drmModeEncoderPtr drmModeGetEncoder(int fd, uint32_t encoder_id)
 461 {
 462         struct drm_mode_get_encoder enc;
 463         drmModeEncoderPtr r = NULL;
 464
 465         memclear(enc);
 466         enc.encoder_id = encoder_id;
 467
 468         if (drmIoctl(fd, DRM_IOCTL_MODE_GETENCODER, &enc))
 469                 return 0;
 470
 471         if (!(r = drmMalloc(sizeof(*r))))
 472                 return 0;
 473
 474         r->encoder_id = enc.encoder_id;
 475         r->crtc_id = enc.crtc_id;
 476         r->encoder_type = enc.encoder_type;
 477         r->possible_crtcs = enc.possible_crtcs;
 478         r->possible_clones = enc.possible_clones;
 479
 480         return r;
 481 }
 482
 483 /*
 484  * Connector manipulation
 485  */
 486 static drmModeConnectorPtr
 487 _drmModeGetConnector(int fd, uint32_t connector_id, int probe)
 488 {
 489         struct drm_mode_get_connector conn, counts;
 490         drmModeConnectorPtr r = NULL;
 491         struct drm_mode_modeinfo stack_mode;
 492
 493         memclear(conn);
 494         conn.connector_id = connector_id;
 495         if (!probe) {
 496                 conn.count_modes = 1;
 497                 conn.modes_ptr = VOID2U64(&stack_mode);
 498         }
 499
 500         if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
 501                 return 0;
 502
 503 retry:
 504         counts = conn;
 505
 506         if (conn.count_props) {
 507                 conn.props_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint32_t)));
 508                 if (!conn.props_ptr)
 509                         goto err_allocs;
 510                 conn.prop_values_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint64_t)));
 511                 if (!conn.prop_values_ptr)
 512                         goto err_allocs;
 513         }
 514
 515         if (conn.count_modes) {
 516                 conn.modes_ptr = VOID2U64(drmMalloc(conn.count_modes*sizeof(struct drm_mode_modeinfo)));
 517                 if (!conn.modes_ptr)
 518                         goto err_allocs;
 519         } else {
 520                 conn.count_modes = 1;
 521                 conn.modes_ptr = VOID2U64(&stack_mode);
 522         }
 523
 524         if (conn.count_encoders) {
 525                 conn.encoders_ptr = VOID2U64(drmMalloc(conn.count_encoders*sizeof(uint32_t)));
 526                 if (!conn.encoders_ptr)
 527                         goto err_allocs;
 528         }
 529
 530         if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
 531                 goto err_allocs;
 532
 533         /* The number of available connectors and etc may have changed with a
 534          * hotplug event in between the ioctls, in which case the field is
 535          * silently ignored by the kernel.
 536          */
 537         if (counts.count_props < conn.count_props ||
 538             counts.count_modes < conn.count_modes ||
 539             counts.count_encoders < conn.count_encoders) {
 540                 drmFree(U642VOID(conn.props_ptr));
 541                 drmFree(U642VOID(conn.prop_values_ptr));
 542                 if (U642VOID(conn.modes_ptr) != &stack_mode)
 543                         drmFree(U642VOID(conn.modes_ptr));
 544                 drmFree(U642VOID(conn.encoders_ptr));
 545
 546                 goto retry;
 547         }
 548
 549         if(!(r = drmMalloc(sizeof(*r)))) {
 550                 goto err_allocs;
 551         }
 552
 553         r->connector_id = conn.connector_id;
 554         r->encoder_id = conn.encoder_id;
 555         r->connection   = conn.connection;
 556         r->mmWidth      = conn.mm_width;
 557         r->mmHeight     = conn.mm_height;
 558         /* convert subpixel from kernel to userspace */
 559         r->subpixel     = conn.subpixel + 1;
 560         r->count_modes  = conn.count_modes;
 561         r->count_props  = conn.count_props;
 562         r->props        = drmAllocCpy(U642VOID(conn.props_ptr), conn.count_props, sizeof(uint32_t));
 563         r->prop_values  = drmAllocCpy(U642VOID(conn.prop_values_ptr), conn.count_props, sizeof(uint64_t));
 564         r->modes        = drmAllocCpy(U642VOID(conn.modes_ptr), conn.count_modes, sizeof(struct drm_mode_modeinfo));
 565         r->count_encoders = conn.count_encoders;
 566         r->encoders     = drmAllocCpy(U642VOID(conn.encoders_ptr), conn.count_encoders, sizeof(uint32_t));
 567         r->connector_type  = conn.connector_type;
 568         r->connector_type_id = conn.connector_type_id;
 569
 570         if ((r->count_props && !r->props) ||
 571             (r->count_props && !r->prop_values) ||
 572             (r->count_modes && !r->modes) ||
 573             (r->count_encoders && !r->encoders)) {
 574                 drmFree(r->props);
 575                 drmFree(r->prop_values);
 576                 drmFree(r->modes);
 577                 drmFree(r->encoders);
 578                 drmFree(r);
 579                 r = 0;
 580         }
 581
 582 err_allocs:
 583         drmFree(U642VOID(conn.prop_values_ptr));
 584         drmFree(U642VOID(conn.props_ptr));
 585         if (U642VOID(conn.modes_ptr) != &stack_mode)
 586                 drmFree(U642VOID(conn.modes_ptr));
 587         drmFree(U642VOID(conn.encoders_ptr));
 588
 589         return r;
 590 }
 591
 592 drmModeConnectorPtr drmModeGetConnector(int fd, uint32_t connector_id)
 593 {
 594         return _drmModeGetConnector(fd, connector_id, 1);
 595 }
 596
 597 drmModeConnectorPtr drmModeGetConnectorCurrent(int fd, uint32_t connector_id)
 598 {
 599         return _drmModeGetConnector(fd, connector_id, 0);
 600 }
 601
 602 int drmModeAttachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
 603 {
 604         struct drm_mode_mode_cmd res;
 605
 606         memclear(res);
 607         memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
 608         res.connector_id = connector_id;
 609
 610         return DRM_IOCTL(fd, DRM_IOCTL_MODE_ATTACHMODE, &res);
 611 }
 612
 613 int drmModeDetachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
 614 {
 615         struct drm_mode_mode_cmd res;
 616
 617         memclear(res);
 618         memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
 619         res.connector_id = connector_id;
 620
 621         return DRM_IOCTL(fd, DRM_IOCTL_MODE_DETACHMODE, &res);
 622 }
 623
 624 drmModePropertyPtr drmModeGetProperty(int fd, uint32_t property_id)
 625 {
 626         struct drm_mode_get_property prop;
 627         drmModePropertyPtr r;
 628
 629         memclear(prop);
 630         prop.prop_id = property_id;
 631
 632         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop))
 633                 return 0;
 634
 635         if (prop.count_values)
 636                 prop.values_ptr = VOID2U64(drmMalloc(prop.count_values * sizeof(uint64_t)));
 637
 638         if (prop.count_enum_blobs && (prop.flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)))
 639                 prop.enum_blob_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(struct drm_mode_property_enum)));
 640
 641         if (prop.count_enum_blobs && (prop.flags & DRM_MODE_PROP_BLOB)) {
 642                 prop.values_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(uint32_t)));
 643                 prop.enum_blob_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(uint32_t)));
 644         }
 645
 646         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop)) {
 647                 r = NULL;
 648                 goto err_allocs;
 649         }
 650
 651         if (!(r = drmMalloc(sizeof(*r))))
 652                 return NULL;
 653
 654         r->prop_id = prop.prop_id;
 655         r->count_values = prop.count_values;
 656
 657         r->flags = prop.flags;
 658         if (prop.count_values)
 659                 r->values = drmAllocCpy(U642VOID(prop.values_ptr), prop.count_values, sizeof(uint64_t));
 660         if (prop.flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
 661                 r->count_enums = prop.count_enum_blobs;
 662                 r->enums = drmAllocCpy(U642VOID(prop.enum_blob_ptr), prop.count_enum_blobs, sizeof(struct drm_mode_property_enum));
 663         } else if (prop.flags & DRM_MODE_PROP_BLOB) {
 664                 r->values = drmAllocCpy(U642VOID(prop.values_ptr), prop.count_enum_blobs, sizeof(uint32_t));
 665                 r->blob_ids = drmAllocCpy(U642VOID(prop.enum_blob_ptr), prop.count_enum_blobs, sizeof(uint32_t));
 666                 r->count_blobs = prop.count_enum_blobs;
 667         }
 668         strncpy(r->name, prop.name, DRM_PROP_NAME_LEN);
 669         r->name[DRM_PROP_NAME_LEN-1] = 0;
 670
 671 err_allocs:
 672         drmFree(U642VOID(prop.values_ptr));
 673         drmFree(U642VOID(prop.enum_blob_ptr));
 674
 675         return r;
 676 }
 677
 678 void drmModeFreeProperty(drmModePropertyPtr ptr)
 679 {
 680         if (!ptr)
 681                 return;
 682
 683         drmFree(ptr->values);
 684         drmFree(ptr->enums);
 685         drmFree(ptr);
 686 }
 687
 688 drmModePropertyBlobPtr drmModeGetPropertyBlob(int fd, uint32_t blob_id)
 689 {
 690         struct drm_mode_get_blob blob;
 691         drmModePropertyBlobPtr r;
 692
 693         memclear(blob);
 694         blob.blob_id = blob_id;
 695
 696         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob))
 697                 return NULL;
 698
 699         if (blob.length)
 700                 blob.data = VOID2U64(drmMalloc(blob.length));
 701
 702         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob)) {
 703                 r = NULL;
 704                 goto err_allocs;
 705         }
 706
 707         if (!(r = drmMalloc(sizeof(*r))))
 708                 goto err_allocs;
 709
 710         r->id = blob.blob_id;
 711         r->length = blob.length;
 712         r->data = drmAllocCpy(U642VOID(blob.data), 1, blob.length);
 713
 714 err_allocs:
 715         drmFree(U642VOID(blob.data));
 716         return r;
 717 }
 718
 719 void drmModeFreePropertyBlob(drmModePropertyBlobPtr ptr)
 720 {
 721         if (!ptr)
 722                 return;
 723
 724         drmFree(ptr->data);
 725         drmFree(ptr);
 726 }
 727
 728 int drmModeConnectorSetProperty(int fd, uint32_t connector_id, uint32_t property_id,
 729                              uint64_t value)
 730 {
 731         struct drm_mode_connector_set_property osp;
 732
 733         memclear(osp);
 734         osp.connector_id = connector_id;
 735         osp.prop_id = property_id;
 736         osp.value = value;
 737
 738         return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETPROPERTY, &osp);
 739 }
 740
 741 /*
 742  * checks if a modesetting capable driver has attached to the pci id
 743  * returns 0 if modesetting supported.
 744  *  -EINVAL or invalid bus id
 745  *  -ENOSYS if no modesetting support
 746 */
 747 int drmCheckModesettingSupported(const char *busid)
 748 {
 749 #if defined (__linux__)
 750         char pci_dev_dir[1024];
 751         int domain, bus, dev, func;
 752         DIR *sysdir;
 753         struct dirent *dent;
 754         int found = 0, ret;
 755
 756         ret = sscanf(busid, "pci:%04x:%02x:%02x.%d", &domain, &bus, &dev, &func);
 757         if (ret != 4)
 758                 return -EINVAL;
 759
 760         sprintf(pci_dev_dir, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/drm",
 761                 domain, bus, dev, func);
 762
 763         sysdir = opendir(pci_dev_dir);
 764         if (sysdir) {
 765                 dent = readdir(sysdir);
 766                 while (dent) {
 767                         if (!strncmp(dent->d_name, "controlD", 8)) {
 768                                 found = 1;
 769                                 break;
 770                         }
 771
 772                         dent = readdir(sysdir);
 773                 }
 774                 closedir(sysdir);
 775                 if (found)
 776                         return 0;
 777         }
 778
 779         sprintf(pci_dev_dir, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/",
 780                 domain, bus, dev, func);
 781
 782         sysdir = opendir(pci_dev_dir);
 783         if (!sysdir)
 784                 return -EINVAL;
 785
 786         dent = readdir(sysdir);
 787         while (dent) {
 788                 if (!strncmp(dent->d_name, "drm:controlD", 12)) {
 789                         found = 1;
 790                         break;
 791                 }
 792
 793                 dent = readdir(sysdir);
 794         }
 795
 796         closedir(sysdir);
 797         if (found)
 798                 return 0;
 799 #elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
 800         char kbusid[1024], sbusid[1024];
 801         char oid[128];
 802         int domain, bus, dev, func;
 803         int i, modesetting, ret;
 804         size_t len;
 805
 806         ret = sscanf(busid, "pci:%04x:%02x:%02x.%d", &domain, &bus, &dev,
 807             &func);
 808         if (ret != 4)
 809                 return -EINVAL;
 810         snprintf(kbusid, sizeof(kbusid), "pci:%04x:%02x:%02x.%d", domain, bus,
 811             dev, func);
 812
 813         /* How many GPUs do we expect in the machine ? */
 814         for (i = 0; i < 16; i++) {
 815                 snprintf(oid, sizeof(oid), "hw.dri.%d.busid", i);
 816                 len = sizeof(sbusid);
 817                 ret = sysctlbyname(oid, sbusid, &len, NULL, 0);
 818                 if (ret == -1) {
 819                         if (errno == ENOENT)
 820                                 continue;
 821                         return -EINVAL;
 822                 }
 823                 if (strcmp(sbusid, kbusid) != 0)
 824                         continue;
 825                 snprintf(oid, sizeof(oid), "hw.dri.%d.modesetting", i);
 826                 len = sizeof(modesetting);
 827                 ret = sysctlbyname(oid, &modesetting, &len, NULL, 0);
 828                 if (ret == -1 || len != sizeof(modesetting))
 829                         return -EINVAL;
 830                 return (modesetting ? 0 : -ENOSYS);
 831         }
 832 #elif defined(__DragonFly__)
 833         return 0;
 834 #endif
 835 #ifdef __OpenBSD__
 836         int     fd;
 837         struct drm_mode_card_res res;
 838         drmModeResPtr r = 0;
 839
 840         if ((fd = drmOpen(NULL, busid)) < 0)
 841                 return -EINVAL;
 842
 843         memset(&res, 0, sizeof(struct drm_mode_card_res));
 844
 845         if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res)) {
 846                 drmClose(fd);
 847                 return -errno;
 848         }
 849
 850         drmClose(fd);
 851         return 0;
 852 #endif
 853         return -ENOSYS;
 854 }
 855
 856 int drmModeCrtcGetGamma(int fd, uint32_t crtc_id, uint32_t size,
 857                         uint16_t *red, uint16_t *green, uint16_t *blue)
 858 {
 859         struct drm_mode_crtc_lut l;
 860
 861         memclear(l);
 862         l.crtc_id = crtc_id;
 863         l.gamma_size = size;
 864         l.red = VOID2U64(red);
 865         l.green = VOID2U64(green);
 866         l.blue = VOID2U64(blue);
 867
 868         return DRM_IOCTL(fd, DRM_IOCTL_MODE_GETGAMMA, &l);
 869 }
 870
 871 int drmModeCrtcSetGamma(int fd, uint32_t crtc_id, uint32_t size,
 872                         uint16_t *red, uint16_t *green, uint16_t *blue)
 873 {
 874         struct drm_mode_crtc_lut l;
 875
 876         memclear(l);
 877         l.crtc_id = crtc_id;
 878         l.gamma_size = size;
 879         l.red = VOID2U64(red);
 880         l.green = VOID2U64(green);
 881         l.blue = VOID2U64(blue);
 882
 883         return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETGAMMA, &l);
 884 }
 885
 886 int drmHandleEvent(int fd, drmEventContextPtr evctx)
 887 {
 888         char buffer[1024];
 889         int len, i;
 890         struct drm_event *e;
 891         struct drm_event_vblank *vblank;
 892
 893         /* The DRM read semantics guarantees that we always get only
 894          * complete events. */
 895
 896         len = read(fd, buffer, sizeof buffer);
 897         if (len == 0)
 898                 return 0;
 899         if (len < (int)sizeof *e)
 900                 return -1;
 901
 902         i = 0;
 903         while (i < len) {
 904                 e = (struct drm_event *) &buffer[i];
 905                 switch (e->type) {
 906                 case DRM_EVENT_VBLANK:
 907                         if (evctx->version < 1 ||
 908                             evctx->vblank_handler == NULL)
 909                                 break;
 910                         vblank = (struct drm_event_vblank *) e;
 911                         evctx->vblank_handler(fd,
 912                                               vblank->sequence,
 913                                               vblank->tv_sec,
 914                                               vblank->tv_usec,
 915                                               U642VOID (vblank->user_data));
 916                         break;
 917                 case DRM_EVENT_FLIP_COMPLETE:
 918                         if (evctx->version < 2 ||
 919                             evctx->page_flip_handler == NULL)
 920                                 break;
 921                         vblank = (struct drm_event_vblank *) e;
 922                         evctx->page_flip_handler(fd,
 923                                                  vblank->sequence,
 924                                                  vblank->tv_sec,
 925                                                  vblank->tv_usec,
 926                                                  U642VOID (vblank->user_data));
 927                         break;
 928                 default:
 929                         break;
 930                 }
 931                 i += e->length;
 932         }
 933
 934         return 0;
 935 }
 936
 937 int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
 938                     uint32_t flags, void *user_data)
 939 {
 940         struct drm_mode_crtc_page_flip flip;
 941
 942         memclear(flip);
 943         flip.fb_id = fb_id;
 944         flip.crtc_id = crtc_id;
 945         flip.user_data = VOID2U64(user_data);
 946         flip.flags = flags;
 947
 948         return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip);
 949 }
 950
 951 int drmModePageFlipTarget(int fd, uint32_t crtc_id, uint32_t fb_id,
 952                           uint32_t flags, void *user_data,
 953                           uint32_t target_vblank)
 954 {
 955         struct drm_mode_crtc_page_flip_target flip_target;
 956
 957         memclear(flip_target);
 958         flip_target.fb_id = fb_id;
 959         flip_target.crtc_id = crtc_id;
 960         flip_target.user_data = VOID2U64(user_data);
 961         flip_target.flags = flags;
 962         flip_target.sequence = target_vblank;
 963
 964         return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip_target);
 965 }
 966
 967 int drmModeSetPlane(int fd, uint32_t plane_id, uint32_t crtc_id,
 968                     uint32_t fb_id, uint32_t flags,
 969                     int32_t crtc_x, int32_t crtc_y,
 970                     uint32_t crtc_w, uint32_t crtc_h,
 971                     uint32_t src_x, uint32_t src_y,
 972                     uint32_t src_w, uint32_t src_h)
 973 {
 974         struct drm_mode_set_plane s;
 975
 976         memclear(s);
 977         s.plane_id = plane_id;
 978         s.crtc_id = crtc_id;
 979         s.fb_id = fb_id;
 980         s.flags = flags;
 981         s.crtc_x = crtc_x;
 982         s.crtc_y = crtc_y;
 983         s.crtc_w = crtc_w;
 984         s.crtc_h = crtc_h;
 985         s.src_x = src_x;
 986         s.src_y = src_y;
 987         s.src_w = src_w;
 988         s.src_h = src_h;
 989
 990         return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETPLANE, &s);
 991 }
 992
 993 drmModePlanePtr drmModeGetPlane(int fd, uint32_t plane_id)
 994 {
 995         struct drm_mode_get_plane ovr, counts;
 996         drmModePlanePtr r = 0;
 997
 998 retry:
 999         memclear(ovr);
1000         ovr.plane_id = plane_id;
1001         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPLANE, &ovr))
1002                 return 0;
1003
1004         counts = ovr;
1005
1006         if (ovr.count_format_types) {
1007                 ovr.format_type_ptr = VOID2U64(drmMalloc(ovr.count_format_types *
1008                                                          sizeof(uint32_t)));
1009                 if (!ovr.format_type_ptr)
1010                         goto err_allocs;
1011         }
1012
1013         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPLANE, &ovr))
1014                 goto err_allocs;
1015
1016         if (counts.count_format_types < ovr.count_format_types) {
1017                 drmFree(U642VOID(ovr.format_type_ptr));
1018                 goto retry;
1019         }
1020
1021         if (!(r = drmMalloc(sizeof(*r))))
1022                 goto err_allocs;
1023
1024         r->count_formats = ovr.count_format_types;
1025         r->plane_id = ovr.plane_id;
1026         r->crtc_id = ovr.crtc_id;
1027         r->fb_id = ovr.fb_id;
1028         r->possible_crtcs = ovr.possible_crtcs;
1029         r->gamma_size = ovr.gamma_size;
1030         r->formats = drmAllocCpy(U642VOID(ovr.format_type_ptr),
1031                                  ovr.count_format_types, sizeof(uint32_t));
1032         if (ovr.count_format_types && !r->formats) {
1033                 drmFree(r->formats);
1034                 drmFree(r);
1035                 r = 0;
1036         }
1037
1038 err_allocs:
1039         drmFree(U642VOID(ovr.format_type_ptr));
1040
1041         return r;
1042 }
1043
1044 void drmModeFreePlane(drmModePlanePtr ptr)
1045 {
1046         if (!ptr)
1047                 return;
1048
1049         drmFree(ptr->formats);
1050         drmFree(ptr);
1051 }
1052
1053 drmModePlaneResPtr drmModeGetPlaneResources(int fd)
1054 {
1055         struct drm_mode_get_plane_res res, counts;
1056         drmModePlaneResPtr r = 0;
1057
1058 retry:
1059         memclear(res);
1060         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPLANERESOURCES, &res))
1061                 return 0;
1062
1063         counts = res;
1064
1065         if (res.count_planes) {
1066                 res.plane_id_ptr = VOID2U64(drmMalloc(res.count_planes *
1067                                                         sizeof(uint32_t)));
1068                 if (!res.plane_id_ptr)
1069                         goto err_allocs;
1070         }
1071
1072         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPLANERESOURCES, &res))
1073                 goto err_allocs;
1074
1075         if (counts.count_planes < res.count_planes) {
1076                 drmFree(U642VOID(res.plane_id_ptr));
1077                 goto retry;
1078         }
1079
1080         if (!(r = drmMalloc(sizeof(*r))))
1081                 goto err_allocs;
1082
1083         r->count_planes = res.count_planes;
1084         r->planes = drmAllocCpy(U642VOID(res.plane_id_ptr),
1085                                   res.count_planes, sizeof(uint32_t));
1086         if (res.count_planes && !r->planes) {
1087                 drmFree(r->planes);
1088                 drmFree(r);
1089                 r = 0;
1090         }
1091
1092 err_allocs:
1093         drmFree(U642VOID(res.plane_id_ptr));
1094
1095         return r;
1096 }
1097
1098 void drmModeFreePlaneResources(drmModePlaneResPtr ptr)
1099 {
1100         if (!ptr)
1101                 return;
1102
1103         drmFree(ptr->planes);
1104         drmFree(ptr);
1105 }
1106
1107 drmModeObjectPropertiesPtr drmModeObjectGetProperties(int fd,
1108                                                       uint32_t object_id,
1109                                                       uint32_t object_type)
1110 {
1111         struct drm_mode_obj_get_properties properties;
1112         drmModeObjectPropertiesPtr ret = NULL;
1113         uint32_t count;
1114
1115 retry:
1116         memclear(properties);
1117         properties.obj_id = object_id;
1118         properties.obj_type = object_type;
1119
1120         if (drmIoctl(fd, DRM_IOCTL_MODE_OBJ_GETPROPERTIES, &properties))
1121                 return 0;
1122
1123         count = properties.count_props;
1124
1125         if (count) {
1126                 properties.props_ptr = VOID2U64(drmMalloc(count *
1127                                                           sizeof(uint32_t)));
1128                 if (!properties.props_ptr)
1129                         goto err_allocs;
1130                 properties.prop_values_ptr = VOID2U64(drmMalloc(count *
1131                                                       sizeof(uint64_t)));
1132                 if (!properties.prop_values_ptr)
1133                         goto err_allocs;
1134         }
1135
1136         if (drmIoctl(fd, DRM_IOCTL_MODE_OBJ_GETPROPERTIES, &properties))
1137                 goto err_allocs;
1138
1139         if (count < properties.count_props) {
1140                 drmFree(U642VOID(properties.props_ptr));
1141                 drmFree(U642VOID(properties.prop_values_ptr));
1142                 goto retry;
1143         }
1144         count = properties.count_props;
1145
1146         ret = drmMalloc(sizeof(*ret));
1147         if (!ret)
1148                 goto err_allocs;
1149
1150         ret->count_props = count;
1151         ret->props = drmAllocCpy(U642VOID(properties.props_ptr),
1152                                  count, sizeof(uint32_t));
1153         ret->prop_values = drmAllocCpy(U642VOID(properties.prop_values_ptr),
1154                                        count, sizeof(uint64_t));
1155         if (ret->count_props && (!ret->props || !ret->prop_values)) {
1156                 drmFree(ret->props);
1157                 drmFree(ret->prop_values);
1158                 drmFree(ret);
1159                 ret = NULL;
1160         }
1161
1162 err_allocs:
1163         drmFree(U642VOID(properties.props_ptr));
1164         drmFree(U642VOID(properties.prop_values_ptr));
1165         return ret;
1166 }
1167
1168 void drmModeFreeObjectProperties(drmModeObjectPropertiesPtr ptr)
1169 {
1170         if (!ptr)
1171                 return;
1172         drmFree(ptr->props);
1173         drmFree(ptr->prop_values);
1174         drmFree(ptr);
1175 }
1176
1177 int drmModeObjectSetProperty(int fd, uint32_t object_id, uint32_t object_type,
1178                              uint32_t property_id, uint64_t value)
1179 {
1180         struct drm_mode_obj_set_property prop;
1181
1182         memclear(prop);
1183         prop.value = value;
1184         prop.prop_id = property_id;
1185         prop.obj_id = object_id;
1186         prop.obj_type = object_type;
1187
1188         return DRM_IOCTL(fd, DRM_IOCTL_MODE_OBJ_SETPROPERTY, &prop);
1189 }
1190
1191 typedef struct _drmModeAtomicReqItem drmModeAtomicReqItem, *drmModeAtomicReqItemPtr;
1192
1193 struct _drmModeAtomicReqItem {
1194         uint32_t object_id;
1195         uint32_t property_id;
1196         uint64_t value;
1197 };
1198
1199 struct _drmModeAtomicReq {
1200         uint32_t cursor;
1201         uint32_t size_items;
1202         drmModeAtomicReqItemPtr items;
1203 };
1204
1205 drmModeAtomicReqPtr drmModeAtomicAlloc(void)
1206 {
1207         drmModeAtomicReqPtr req;
1208
1209         req = drmMalloc(sizeof *req);
1210         if (!req)
1211                 return NULL;
1212
1213         req->items = NULL;
1214         req->cursor = 0;
1215         req->size_items = 0;
1216
1217         return req;
1218 }
1219
1220 drmModeAtomicReqPtr drmModeAtomicDuplicate(drmModeAtomicReqPtr old)
1221 {
1222         drmModeAtomicReqPtr new;
1223
1224         if (!old)
1225                 return NULL;
1226
1227         new = drmMalloc(sizeof *new);
1228         if (!new)
1229                 return NULL;
1230
1231         new->cursor = old->cursor;
1232         new->size_items = old->size_items;
1233
1234         if (old->size_items) {
1235                 new->items = drmMalloc(old->size_items * sizeof(*new->items));
1236                 if (!new->items) {
1237                         free(new);
1238                         return NULL;
1239                 }
1240                 memcpy(new->items, old->items,
1241                        old->size_items * sizeof(*new->items));
1242         } else {
1243                 new->items = NULL;
1244         }
1245
1246         return new;
1247 }
1248
1249 int drmModeAtomicMerge(drmModeAtomicReqPtr base, drmModeAtomicReqPtr augment)
1250 {
1251         if (!base)
1252                 return -EINVAL;
1253
1254         if (!augment || augment->cursor == 0)
1255                 return 0;
1256
1257         if (base->cursor + augment->cursor >= base->size_items) {
1258                 drmModeAtomicReqItemPtr new;
1259                 int saved_size = base->size_items;
1260
1261                 base->size_items = base->cursor + augment->cursor;
1262                 new = realloc(base->items,
1263                               base->size_items * sizeof(*base->items));
1264                 if (!new) {
1265                         base->size_items = saved_size;
1266                         return -ENOMEM;
1267                 }
1268                 base->items = new;
1269         }
1270
1271         memcpy(&base->items[base->cursor], augment->items,
1272                augment->cursor * sizeof(*augment->items));
1273         base->cursor += augment->cursor;
1274
1275         return 0;
1276 }
1277
1278 int drmModeAtomicGetCursor(drmModeAtomicReqPtr req)
1279 {
1280         if (!req)
1281                 return -EINVAL;
1282         return req->cursor;
1283 }
1284
1285 void drmModeAtomicSetCursor(drmModeAtomicReqPtr req, int cursor)
1286 {
1287         if (req)
1288                 req->cursor = cursor;
1289 }
1290
1291 int drmModeAtomicAddProperty(drmModeAtomicReqPtr req,
1292                              uint32_t object_id,
1293                              uint32_t property_id,
1294                              uint64_t value)
1295 {
1296         if (!req)
1297                 return -EINVAL;
1298
1299         if (req->cursor >= req->size_items) {
1300                 drmModeAtomicReqItemPtr new;
1301
1302                 req->size_items += 16;
1303                 new = realloc(req->items, req->size_items * sizeof(*req->items));
1304                 if (!new) {
1305                         req->size_items -= 16;
1306                         return -ENOMEM;
1307                 }
1308                 req->items = new;
1309         }
1310
1311         req->items[req->cursor].object_id = object_id;
1312         req->items[req->cursor].property_id = property_id;
1313         req->items[req->cursor].value = value;
1314         req->cursor++;
1315
1316         return req->cursor;
1317 }
1318
1319 void drmModeAtomicFree(drmModeAtomicReqPtr req)
1320 {
1321         if (!req)
1322                 return;
1323
1324         if (req->items)
1325                 drmFree(req->items);
1326         drmFree(req);
1327 }
1328
1329 static int sort_req_list(const void *misc, const void *other)
1330 {
1331         const drmModeAtomicReqItem *first = misc;
1332         const drmModeAtomicReqItem *second = other;
1333
1334         if (first->object_id < second->object_id)
1335                 return -1;
1336         else if (first->object_id > second->object_id)
1337                 return 1;
1338         else
1339                 return second->property_id - first->property_id;
1340 }
1341
1342 int drmModeAtomicCommit(int fd, drmModeAtomicReqPtr req, uint32_t flags,
1343                         void *user_data)
1344 {
1345         drmModeAtomicReqPtr sorted;
1346         struct drm_mode_atomic atomic;
1347         uint32_t *objs_ptr = NULL;
1348         uint32_t *count_props_ptr = NULL;
1349         uint32_t *props_ptr = NULL;
1350         uint64_t *prop_values_ptr = NULL;
1351         uint32_t last_obj_id = 0;
1352         uint32_t i;
1353         int obj_idx = -1;
1354         int ret = -1;
1355
1356         if (!req)
1357                 return -EINVAL;
1358
1359         if (req->cursor == 0)
1360                 return 0;
1361
1362         sorted = drmModeAtomicDuplicate(req);
1363         if (sorted == NULL)
1364                 return -ENOMEM;
1365
1366         memclear(atomic);
1367
1368         /* Sort the list by object ID, then by property ID. */
1369         qsort(sorted->items, sorted->cursor, sizeof(*sorted->items),
1370               sort_req_list);
1371
1372         /* Now the list is sorted, eliminate duplicate property sets. */
1373         for (i = 0; i < sorted->cursor; i++) {
1374                 if (sorted->items[i].object_id != last_obj_id) {
1375                         atomic.count_objs++;
1376                         last_obj_id = sorted->items[i].object_id;
1377                 }
1378
1379                 if (i == sorted->cursor - 1)
1380                         continue;
1381
1382                 if (sorted->items[i].object_id != sorted->items[i + 1].object_id ||
1383                     sorted->items[i].property_id != sorted->items[i + 1].property_id)
1384                         continue;
1385
1386                 memmove(&sorted->items[i], &sorted->items[i + 1],
1387                         (sorted->cursor - i - 1) * sizeof(*sorted->items));
1388                 sorted->cursor--;
1389         }
1390
1391         objs_ptr = drmMalloc(atomic.count_objs * sizeof objs_ptr[0]);
1392         if (!objs_ptr) {
1393                 errno = ENOMEM;
1394                 goto out;
1395         }
1396
1397         count_props_ptr = drmMalloc(atomic.count_objs * sizeof count_props_ptr[0]);
1398         if (!count_props_ptr) {
1399                 errno = ENOMEM;
1400                 goto out;
1401         }
1402
1403         props_ptr = drmMalloc(sorted->cursor * sizeof props_ptr[0]);
1404         if (!props_ptr) {
1405                 errno = ENOMEM;
1406                 goto out;
1407         }
1408
1409         prop_values_ptr = drmMalloc(sorted->cursor * sizeof prop_values_ptr[0]);
1410         if (!prop_values_ptr) {
1411                 errno = ENOMEM;
1412                 goto out;
1413         }
1414
1415         for (i = 0, last_obj_id = 0; i < sorted->cursor; i++) {
1416                 if (sorted->items[i].object_id != last_obj_id) {
1417                         obj_idx++;
1418                         objs_ptr[obj_idx] = sorted->items[i].object_id;
1419                         last_obj_id = objs_ptr[obj_idx];
1420                 }
1421
1422                 count_props_ptr[obj_idx]++;
1423                 props_ptr[i] = sorted->items[i].property_id;
1424                 prop_values_ptr[i] = sorted->items[i].value;
1425
1426         }
1427
1428         atomic.flags = flags;
1429         atomic.objs_ptr = VOID2U64(objs_ptr);
1430         atomic.count_props_ptr = VOID2U64(count_props_ptr);
1431         atomic.props_ptr = VOID2U64(props_ptr);
1432         atomic.prop_values_ptr = VOID2U64(prop_values_ptr);
1433         atomic.user_data = VOID2U64(user_data);
1434
1435         ret = DRM_IOCTL(fd, DRM_IOCTL_MODE_ATOMIC, &atomic);
1436
1437 out:
1438         drmFree(objs_ptr);
1439         drmFree(count_props_ptr);
1440         drmFree(props_ptr);
1441         drmFree(prop_values_ptr);
1442         drmModeAtomicFree(sorted);
1443
1444         return ret;
1445 }
1446
1447 int
1448 drmModeCreatePropertyBlob(int fd, const void *data, size_t length, uint32_t *id)
1449 {
1450         struct drm_mode_create_blob create;
1451         int ret;
1452
1453         if (length >= 0xffffffff)
1454                 return -ERANGE;
1455
1456         memclear(create);
1457
1458         create.length = length;
1459         create.data = (uintptr_t) data;
1460         create.blob_id = 0;
1461         *id = 0;
1462
1463         ret = DRM_IOCTL(fd, DRM_IOCTL_MODE_CREATEPROPBLOB, &create);
1464         if (ret != 0)
1465                 return ret;
1466
1467         *id = create.blob_id;
1468         return 0;
1469 }
1470
1471 int
1472 drmModeDestroyPropertyBlob(int fd, uint32_t id)
1473 {
1474         struct drm_mode_destroy_blob destroy;
1475
1476         memclear(destroy);
1477         destroy.blob_id = id;
1478         return DRM_IOCTL(fd, DRM_IOCTL_MODE_DESTROYPROPBLOB, &destroy);
1479 }