drivers/gpu/drm/nouveau/nouveau_display.c

   1 /*
   2  * Copyright (C) 2008 Maarten Maathuis.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm_crtc_helper.h"
  29 #include "nouveau_drv.h"
  30 #include "nouveau_fb.h"
  31 #include "nouveau_fbcon.h"
  32 #include "nouveau_hw.h"
  33 #include "nouveau_crtc.h"
  34 #include "nouveau_dma.h"
  35 #include "nouveau_connector.h"
  36 #include "nouveau_software.h"
  37 #include "nouveau_gpio.h"
  38 #include "nouveau_fence.h"
  39 #include "nv50_display.h"
  40
  41 static void
  42 nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
  43 {
  44         struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
  45
  46         if (fb->nvbo)
  47                 drm_gem_object_unreference_unlocked(fb->nvbo->gem);
  48
  49         drm_framebuffer_cleanup(drm_fb);
  50         kfree(fb);
  51 }
  52
  53 static int
  54 nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
  55                                        struct drm_file *file_priv,
  56                                        unsigned int *handle)
  57 {
  58         struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
  59
  60         return drm_gem_handle_create(file_priv, fb->nvbo->gem, handle);
  61 }
  62
  63 static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
  64         .destroy = nouveau_user_framebuffer_destroy,
  65         .create_handle = nouveau_user_framebuffer_create_handle,
  66 };
  67
  68 int
  69 nouveau_framebuffer_init(struct drm_device *dev,
  70                          struct nouveau_framebuffer *nv_fb,
  71                          struct drm_mode_fb_cmd2 *mode_cmd,
  72                          struct nouveau_bo *nvbo)
  73 {
  74         struct drm_nouveau_private *dev_priv = dev->dev_private;
  75         struct drm_framebuffer *fb = &nv_fb->base;
  76         int ret;
  77
  78         ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
  79         if (ret) {
  80                 return ret;
  81         }
  82
  83         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
  84         nv_fb->nvbo = nvbo;
  85
  86         if (dev_priv->card_type >= NV_50) {
  87                 u32 tile_flags = nouveau_bo_tile_layout(nvbo);
  88                 if (tile_flags == 0x7a00 ||
  89                     tile_flags == 0xfe00)
  90                         nv_fb->r_dma = NvEvoFB32;
  91                 else
  92                 if (tile_flags == 0x7000)
  93                         nv_fb->r_dma = NvEvoFB16;
  94                 else
  95                         nv_fb->r_dma = NvEvoVRAM_LP;
  96
  97                 switch (fb->depth) {
  98                 case  8: nv_fb->r_format = NV50_EVO_CRTC_FB_DEPTH_8; break;
  99                 case 15: nv_fb->r_format = NV50_EVO_CRTC_FB_DEPTH_15; break;
 100                 case 16: nv_fb->r_format = NV50_EVO_CRTC_FB_DEPTH_16; break;
 101                 case 24:
 102                 case 32: nv_fb->r_format = NV50_EVO_CRTC_FB_DEPTH_24; break;
 103                 case 30: nv_fb->r_format = NV50_EVO_CRTC_FB_DEPTH_30; break;
 104                 default:
 105                          NV_ERROR(dev, "unknown depth %d\n", fb->depth);
 106                          return -EINVAL;
 107                 }
 108
 109                 if (dev_priv->chipset == 0x50)
 110                         nv_fb->r_format |= (tile_flags << 8);
 111
 112                 if (!tile_flags) {
 113                         if (dev_priv->card_type < NV_D0)
 114                                 nv_fb->r_pitch = 0x00100000 | fb->pitches[0];
 115                         else
 116                                 nv_fb->r_pitch = 0x01000000 | fb->pitches[0];
 117                 } else {
 118                         u32 mode = nvbo->tile_mode;
 119                         if (dev_priv->card_type >= NV_C0)
 120                                 mode >>= 4;
 121                         nv_fb->r_pitch = ((fb->pitches[0] / 4) << 4) | mode;
 122                 }
 123         }
 124
 125         return 0;
 126 }
 127
 128 static struct drm_framebuffer *
 129 nouveau_user_framebuffer_create(struct drm_device *dev,
 130                                 struct drm_file *file_priv,
 131                                 struct drm_mode_fb_cmd2 *mode_cmd)
 132 {
 133         struct nouveau_framebuffer *nouveau_fb;
 134         struct drm_gem_object *gem;
 135         int ret;
 136
 137         gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
 138         if (!gem)
 139                 return ERR_PTR(-ENOENT);
 140
 141         nouveau_fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
 142         if (!nouveau_fb)
 143                 return ERR_PTR(-ENOMEM);
 144
 145         ret = nouveau_framebuffer_init(dev, nouveau_fb, mode_cmd, nouveau_gem_object(gem));
 146         if (ret) {
 147                 drm_gem_object_unreference(gem);
 148                 return ERR_PTR(ret);
 149         }
 150
 151         return &nouveau_fb->base;
 152 }
 153
 154 static const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
 155         .fb_create = nouveau_user_framebuffer_create,
 156         .output_poll_changed = nouveau_fbcon_output_poll_changed,
 157 };
 158
 159
 160 struct nouveau_drm_prop_enum_list {
 161         u8 gen_mask;
 162         int type;
 163         char *name;
 164 };
 165
 166 static struct nouveau_drm_prop_enum_list underscan[] = {
 167         { 6, UNDERSCAN_AUTO, "auto" },
 168         { 6, UNDERSCAN_OFF, "off" },
 169         { 6, UNDERSCAN_ON, "on" },
 170         {}
 171 };
 172
 173 static struct nouveau_drm_prop_enum_list dither_mode[] = {
 174         { 7, DITHERING_MODE_AUTO, "auto" },
 175         { 7, DITHERING_MODE_OFF, "off" },
 176         { 1, DITHERING_MODE_ON, "on" },
 177         { 6, DITHERING_MODE_STATIC2X2, "static 2x2" },
 178         { 6, DITHERING_MODE_DYNAMIC2X2, "dynamic 2x2" },
 179         { 4, DITHERING_MODE_TEMPORAL, "temporal" },
 180         {}
 181 };
 182
 183 static struct nouveau_drm_prop_enum_list dither_depth[] = {
 184         { 6, DITHERING_DEPTH_AUTO, "auto" },
 185         { 6, DITHERING_DEPTH_6BPC, "6 bpc" },
 186         { 6, DITHERING_DEPTH_8BPC, "8 bpc" },
 187         {}
 188 };
 189
 190 #define PROP_ENUM(p,gen,n,list) do {                                           \
 191         struct nouveau_drm_prop_enum_list *l = (list);                         \
 192         int c = 0;                                                             \
 193         while (l->gen_mask) {                                                  \
 194                 if (l->gen_mask & (1 << (gen)))                                \
 195                         c++;                                                   \
 196                 l++;                                                           \
 197         }                                                                      \
 198         if (c) {                                                               \
 199                 p = drm_property_create(dev, DRM_MODE_PROP_ENUM, n, c);        \
 200                 l = (list);                                                    \
 201                 c = 0;                                                         \
 202                 while (p && l->gen_mask) {                                     \
 203                         if (l->gen_mask & (1 << (gen))) {                      \
 204                                 drm_property_add_enum(p, c, l->type, l->name); \
 205                                 c++;                                           \
 206                         }                                                      \
 207                         l++;                                                   \
 208                 }                                                              \
 209         }                                                                      \
 210 } while(0)
 211
 212 int
 213 nouveau_display_init(struct drm_device *dev)
 214 {
 215         struct drm_nouveau_private *dev_priv = dev->dev_private;
 216         struct nouveau_display_engine *disp = &dev_priv->engine.display;
 217         struct drm_connector *connector;
 218         int ret;
 219
 220         ret = disp->init(dev);
 221         if (ret)
 222                 return ret;
 223
 224         /* power on internal panel if it's not already.  the init tables of
 225          * some vbios default this to off for some reason, causing the
 226          * panel to not work after resume
 227          */
 228         if (nouveau_gpio_func_get(dev, DCB_GPIO_PANEL_POWER) == 0) {
 229                 nouveau_gpio_func_set(dev, DCB_GPIO_PANEL_POWER, true);
 230                 msleep(300);
 231         }
 232
 233         /* enable polling for external displays */
 234         drm_kms_helper_poll_enable(dev);
 235
 236         /* enable hotplug interrupts */
 237         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 238                 struct nouveau_connector *conn = nouveau_connector(connector);
 239                 nouveau_gpio_irq(dev, 0, conn->hpd, 0xff, true);
 240         }
 241
 242         return ret;
 243 }
 244
 245 void
 246 nouveau_display_fini(struct drm_device *dev)
 247 {
 248         struct drm_nouveau_private *dev_priv = dev->dev_private;
 249         struct nouveau_display_engine *disp = &dev_priv->engine.display;
 250         struct drm_connector *connector;
 251
 252         /* disable hotplug interrupts */
 253         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 254                 struct nouveau_connector *conn = nouveau_connector(connector);
 255                 nouveau_gpio_irq(dev, 0, conn->hpd, 0xff, false);
 256         }
 257
 258         drm_kms_helper_poll_disable(dev);
 259         disp->fini(dev);
 260 }
 261
 262 int
 263 nouveau_display_create(struct drm_device *dev)
 264 {
 265         struct drm_nouveau_private *dev_priv = dev->dev_private;
 266         struct nouveau_display_engine *disp = &dev_priv->engine.display;
 267         int ret, gen;
 268
 269         drm_mode_config_init(dev);
 270         drm_mode_create_scaling_mode_property(dev);
 271         drm_mode_create_dvi_i_properties(dev);
 272
 273         if (dev_priv->card_type < NV_50)
 274                 gen = 0;
 275         else
 276         if (dev_priv->card_type < NV_D0)
 277                 gen = 1;
 278         else
 279                 gen = 2;
 280
 281         PROP_ENUM(disp->dithering_mode, gen, "dithering mode", dither_mode);
 282         PROP_ENUM(disp->dithering_depth, gen, "dithering depth", dither_depth);
 283         PROP_ENUM(disp->underscan_property, gen, "underscan", underscan);
 284
 285         disp->underscan_hborder_property =
 286                 drm_property_create_range(dev, 0, "underscan hborder", 0, 128);
 287
 288         disp->underscan_vborder_property =
 289                 drm_property_create_range(dev, 0, "underscan vborder", 0, 128);
 290
 291         if (gen == 1) {
 292                 disp->vibrant_hue_property =
 293                         drm_property_create(dev, DRM_MODE_PROP_RANGE,
 294                                             "vibrant hue", 2);
 295                 disp->vibrant_hue_property->values[0] = 0;
 296                 disp->vibrant_hue_property->values[1] = 180; /* -90..+90 */
 297
 298                 disp->color_vibrance_property =
 299                         drm_property_create(dev, DRM_MODE_PROP_RANGE,
 300                                             "color vibrance", 2);
 301                 disp->color_vibrance_property->values[0] = 0;
 302                 disp->color_vibrance_property->values[1] = 200; /* -100..+100 */
 303         }
 304
 305         dev->mode_config.funcs = &nouveau_mode_config_funcs;
 306         dev->mode_config.fb_base = pci_resource_start(dev->pdev, 1);
 307
 308         dev->mode_config.min_width = 0;
 309         dev->mode_config.min_height = 0;
 310         if (dev_priv->card_type < NV_10) {
 311                 dev->mode_config.max_width = 2048;
 312                 dev->mode_config.max_height = 2048;
 313         } else
 314         if (dev_priv->card_type < NV_50) {
 315                 dev->mode_config.max_width = 4096;
 316                 dev->mode_config.max_height = 4096;
 317         } else {
 318                 dev->mode_config.max_width = 8192;
 319                 dev->mode_config.max_height = 8192;
 320         }
 321
 322         dev->mode_config.preferred_depth = 24;
 323         dev->mode_config.prefer_shadow = 1;
 324
 325         drm_kms_helper_poll_init(dev);
 326         drm_kms_helper_poll_disable(dev);
 327
 328         ret = disp->create(dev);
 329         if (ret)
 330                 goto disp_create_err;
 331
 332         if (dev->mode_config.num_crtc) {
 333                 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 334                 if (ret)
 335                         goto vblank_err;
 336         }
 337
 338         return 0;
 339
 340 vblank_err:
 341         disp->destroy(dev);
 342 disp_create_err:
 343         drm_kms_helper_poll_fini(dev);
 344         drm_mode_config_cleanup(dev);
 345         return ret;
 346 }
 347
 348 void
 349 nouveau_display_destroy(struct drm_device *dev)
 350 {
 351         struct drm_nouveau_private *dev_priv = dev->dev_private;
 352         struct nouveau_display_engine *disp = &dev_priv->engine.display;
 353
 354         drm_vblank_cleanup(dev);
 355
 356         disp->destroy(dev);
 357
 358         drm_kms_helper_poll_fini(dev);
 359         drm_mode_config_cleanup(dev);
 360 }
 361
 362 int
 363 nouveau_vblank_enable(struct drm_device *dev, int crtc)
 364 {
 365         struct drm_nouveau_private *dev_priv = dev->dev_private;
 366
 367         if (dev_priv->card_type >= NV_50)
 368                 nv_mask(dev, NV50_PDISPLAY_INTR_EN_1, 0,
 369                         NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_(crtc));
 370         else
 371                 NVWriteCRTC(dev, crtc, NV_PCRTC_INTR_EN_0,
 372                             NV_PCRTC_INTR_0_VBLANK);
 373
 374         return 0;
 375 }
 376
 377 void
 378 nouveau_vblank_disable(struct drm_device *dev, int crtc)
 379 {
 380         struct drm_nouveau_private *dev_priv = dev->dev_private;
 381
 382         if (dev_priv->card_type >= NV_50)
 383                 nv_mask(dev, NV50_PDISPLAY_INTR_EN_1,
 384                         NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_(crtc), 0);
 385         else
 386                 NVWriteCRTC(dev, crtc, NV_PCRTC_INTR_EN_0, 0);
 387 }
 388
 389 static int
 390 nouveau_page_flip_reserve(struct nouveau_bo *old_bo,
 391                           struct nouveau_bo *new_bo)
 392 {
 393         int ret;
 394
 395         ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM);
 396         if (ret)
 397                 return ret;
 398
 399         ret = ttm_bo_reserve(&new_bo->bo, false, false, false, 0);
 400         if (ret)
 401                 goto fail;
 402
 403         ret = ttm_bo_reserve(&old_bo->bo, false, false, false, 0);
 404         if (ret)
 405                 goto fail_unreserve;
 406
 407         return 0;
 408
 409 fail_unreserve:
 410         ttm_bo_unreserve(&new_bo->bo);
 411 fail:
 412         nouveau_bo_unpin(new_bo);
 413         return ret;
 414 }
 415
 416 static void
 417 nouveau_page_flip_unreserve(struct nouveau_bo *old_bo,
 418                             struct nouveau_bo *new_bo,
 419                             struct nouveau_fence *fence)
 420 {
 421         nouveau_bo_fence(new_bo, fence);
 422         ttm_bo_unreserve(&new_bo->bo);
 423
 424         nouveau_bo_fence(old_bo, fence);
 425         ttm_bo_unreserve(&old_bo->bo);
 426
 427         nouveau_bo_unpin(old_bo);
 428 }
 429
 430 static int
 431 nouveau_page_flip_emit(struct nouveau_channel *chan,
 432                        struct nouveau_bo *old_bo,
 433                        struct nouveau_bo *new_bo,
 434                        struct nouveau_page_flip_state *s,
 435                        struct nouveau_fence **pfence)
 436 {
 437         struct nouveau_software_chan *swch = chan->engctx[NVOBJ_ENGINE_SW];
 438         struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
 439         struct drm_device *dev = chan->dev;
 440         unsigned long flags;
 441         int ret;
 442
 443         /* Queue it to the pending list */
 444         spin_lock_irqsave(&dev->event_lock, flags);
 445         list_add_tail(&s->head, &swch->flip);
 446         spin_unlock_irqrestore(&dev->event_lock, flags);
 447
 448         /* Synchronize with the old framebuffer */
 449         ret = nouveau_fence_sync(old_bo->bo.sync_obj, chan);
 450         if (ret)
 451                 goto fail;
 452
 453         /* Emit the pageflip */
 454         ret = RING_SPACE(chan, 3);
 455         if (ret)
 456                 goto fail;
 457
 458         if (dev_priv->card_type < NV_C0) {
 459                 BEGIN_NV04(chan, NvSubSw, NV_SW_PAGE_FLIP, 1);
 460                 OUT_RING  (chan, 0x00000000);
 461                 OUT_RING  (chan, 0x00000000);
 462         } else {
 463                 BEGIN_NVC0(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
 464                 OUT_RING  (chan, 0);
 465                 BEGIN_IMC0(chan, 0, NVSW_SUBCHAN_PAGE_FLIP, 0x0000);
 466         }
 467         FIRE_RING (chan);
 468
 469         ret = nouveau_fence_new(chan, pfence);
 470         if (ret)
 471                 goto fail;
 472
 473         return 0;
 474 fail:
 475         spin_lock_irqsave(&dev->event_lock, flags);
 476         list_del(&s->head);
 477         spin_unlock_irqrestore(&dev->event_lock, flags);
 478         return ret;
 479 }
 480
 481 int
 482 nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 483                        struct drm_pending_vblank_event *event)
 484 {
 485         struct drm_device *dev = crtc->dev;
 486         struct drm_nouveau_private *dev_priv = dev->dev_private;
 487         struct nouveau_bo *old_bo = nouveau_framebuffer(crtc->fb)->nvbo;
 488         struct nouveau_bo *new_bo = nouveau_framebuffer(fb)->nvbo;
 489         struct nouveau_page_flip_state *s;
 490         struct nouveau_channel *chan = NULL;
 491         struct nouveau_fence *fence;
 492         int ret;
 493
 494         if (!dev_priv->channel)
 495                 return -ENODEV;
 496
 497         s = kzalloc(sizeof(*s), GFP_KERNEL);
 498         if (!s)
 499                 return -ENOMEM;
 500
 501         /* Don't let the buffers go away while we flip */
 502         ret = nouveau_page_flip_reserve(old_bo, new_bo);
 503         if (ret)
 504                 goto fail_free;
 505
 506         /* Initialize a page flip struct */
 507         *s = (struct nouveau_page_flip_state)
 508                 { { }, event, nouveau_crtc(crtc)->index,
 509                   fb->bits_per_pixel, fb->pitches[0], crtc->x, crtc->y,
 510                   new_bo->bo.offset };
 511
 512         /* Choose the channel the flip will be handled in */
 513         fence = new_bo->bo.sync_obj;
 514         if (fence)
 515                 chan = nouveau_channel_get_unlocked(fence->channel);
 516         if (!chan)
 517                 chan = nouveau_channel_get_unlocked(dev_priv->channel);
 518         mutex_lock(&chan->mutex);
 519
 520         /* Emit a page flip */
 521         if (dev_priv->card_type >= NV_50) {
 522                 if (dev_priv->card_type >= NV_D0)
 523                         ret = nvd0_display_flip_next(crtc, fb, chan, 0);
 524                 else
 525                         ret = nv50_display_flip_next(crtc, fb, chan);
 526                 if (ret) {
 527                         nouveau_channel_put(&chan);
 528                         goto fail_unreserve;
 529                 }
 530         }
 531
 532         ret = nouveau_page_flip_emit(chan, old_bo, new_bo, s, &fence);
 533         nouveau_channel_put(&chan);
 534         if (ret)
 535                 goto fail_unreserve;
 536
 537         /* Update the crtc struct and cleanup */
 538         crtc->fb = fb;
 539
 540         nouveau_page_flip_unreserve(old_bo, new_bo, fence);
 541         nouveau_fence_unref(&fence);
 542         return 0;
 543
 544 fail_unreserve:
 545         nouveau_page_flip_unreserve(old_bo, new_bo, NULL);
 546 fail_free:
 547         kfree(s);
 548         return ret;
 549 }
 550
 551 int
 552 nouveau_finish_page_flip(struct nouveau_channel *chan,
 553                          struct nouveau_page_flip_state *ps)
 554 {
 555         struct nouveau_software_chan *swch = chan->engctx[NVOBJ_ENGINE_SW];
 556         struct drm_device *dev = chan->dev;
 557         struct nouveau_page_flip_state *s;
 558         unsigned long flags;
 559
 560         spin_lock_irqsave(&dev->event_lock, flags);
 561
 562         if (list_empty(&swch->flip)) {
 563                 NV_ERROR(dev, "Unexpected pageflip in channel %d.\n", chan->id);
 564                 spin_unlock_irqrestore(&dev->event_lock, flags);
 565                 return -EINVAL;
 566         }
 567
 568         s = list_first_entry(&swch->flip, struct nouveau_page_flip_state, head);
 569         if (s->event) {
 570                 struct drm_pending_vblank_event *e = s->event;
 571                 struct timeval now;
 572
 573                 do_gettimeofday(&now);
 574                 e->event.sequence = 0;
 575                 e->event.tv_sec = now.tv_sec;
 576                 e->event.tv_usec = now.tv_usec;
 577                 list_add_tail(&e->base.link, &e->base.file_priv->event_list);
 578                 wake_up_interruptible(&e->base.file_priv->event_wait);
 579         }
 580
 581         list_del(&s->head);
 582         if (ps)
 583                 *ps = *s;
 584         kfree(s);
 585
 586         spin_unlock_irqrestore(&dev->event_lock, flags);
 587         return 0;
 588 }
 589
 590 int
 591 nouveau_display_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
 592                             struct drm_mode_create_dumb *args)
 593 {
 594         struct nouveau_bo *bo;
 595         int ret;
 596
 597         args->pitch = roundup(args->width * (args->bpp / 8), 256);
 598         args->size = args->pitch * args->height;
 599         args->size = roundup(args->size, PAGE_SIZE);
 600
 601         ret = nouveau_gem_new(dev, args->size, 0, TTM_PL_FLAG_VRAM, 0, 0, &bo);
 602         if (ret)
 603                 return ret;
 604
 605         ret = drm_gem_handle_create(file_priv, bo->gem, &args->handle);
 606         drm_gem_object_unreference_unlocked(bo->gem);
 607         return ret;
 608 }
 609
 610 int
 611 nouveau_display_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev,
 612                              uint32_t handle)
 613 {
 614         return drm_gem_handle_delete(file_priv, handle);
 615 }
 616
 617 int
 618 nouveau_display_dumb_map_offset(struct drm_file *file_priv,
 619                                 struct drm_device *dev,
 620                                 uint32_t handle, uint64_t *poffset)
 621 {
 622         struct drm_gem_object *gem;
 623
 624         gem = drm_gem_object_lookup(dev, file_priv, handle);
 625         if (gem) {
 626                 struct nouveau_bo *bo = gem->driver_private;
 627                 *poffset = bo->bo.addr_space_offset;
 628                 drm_gem_object_unreference_unlocked(gem);
 629                 return 0;
 630         }
 631
 632         return -ENOENT;
 633 }