src/gallium/drivers/nvfx/nvfx_screen.c

   1 #include "pipe/p_screen.h"
   2 #include "pipe/p_state.h"
   3 #include "util/u_format_s3tc.h"
   4 #include "util/u_simple_screen.h"
   5
   6 #include "nouveau/nouveau_screen.h"
   7
   8 #include "nvfx_context.h"
   9 #include "nvfx_screen.h"
  10 #include "nvfx_resource.h"
  11
  12 #define NV30TCL_CHIPSET_3X_MASK 0x00000003
  13 #define NV34TCL_CHIPSET_3X_MASK 0x00000010
  14 #define NV35TCL_CHIPSET_3X_MASK 0x000001e0
  15
  16 /* FIXME: It seems I should not include directly ../../winsys/drm/nouveau/drm/nouveau_drm_api.h
  17 * to get the pointer to the context front buffer, so I copied nouveau_winsys here.
  18 * nv30_screen_surface_format_supported() can then use it to enforce creating fbo
  19 * with same number of bits everywhere.
  20 */
  21 struct nouveau_winsys {
  22         struct pipe_winsys base;
  23
  24         struct pipe_screen *pscreen;
  25
  26         struct pipe_surface *front;
  27 };
  28 #define NV4X_GRCLASS4097_CHIPSETS 0x00000baf
  29 #define NV4X_GRCLASS4497_CHIPSETS 0x00005450
  30 #define NV6X_GRCLASS4497_CHIPSETS 0x00000088
  31
  32 static int
  33 nvfx_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
  34 {
  35         struct nvfx_screen *screen = nvfx_screen(pscreen);
  36
  37         switch (param) {
  38         case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  39                 /* TODO: check this */
  40                 return screen->is_nv4x ? 16 : 8;
  41         case PIPE_CAP_NPOT_TEXTURES:
  42                 return !!screen->is_nv4x;
  43         case PIPE_CAP_TWO_SIDED_STENCIL:
  44                 return 1;
  45         case PIPE_CAP_GLSL:
  46                 return 0;
  47         case PIPE_CAP_ANISOTROPIC_FILTER:
  48                 return 1;
  49         case PIPE_CAP_POINT_SPRITE:
  50                 return 1;
  51         case PIPE_CAP_MAX_RENDER_TARGETS:
  52                 return screen->is_nv4x ? 4 : 2;
  53         case PIPE_CAP_OCCLUSION_QUERY:
  54                 return 1;
  55         case PIPE_CAP_TIMER_QUERY:
  56                 return 0;
  57         case PIPE_CAP_TEXTURE_SHADOW_MAP:
  58                 return 1;
  59         case PIPE_CAP_TEXTURE_SWIZZLE:
  60                 return 1;
  61         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  62                 return 13;
  63         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  64                 return 10;
  65         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  66                 return 13;
  67         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  68                 return !!screen->is_nv4x;
  69         case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  70                 return 1;
  71         case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  72                 return 0; /* We have 4 on nv40 - but unsupported currently */
  73         case PIPE_CAP_TGSI_CONT_SUPPORTED:
  74                 return 0;
  75         case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  76                 return !!screen->is_nv4x;
  77         case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  78                 return 16;
  79         case PIPE_CAP_INDEP_BLEND_ENABLE:
  80                 /* TODO: on nv40 we have separate color masks */
  81                 /* TODO: nv40 mrt blending is probably broken */
  82                 return 0;
  83         case PIPE_CAP_INDEP_BLEND_FUNC:
  84                 return 0;
  85         case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
  86                 return 0;
  87         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
  88         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
  89                 return 1;
  90         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
  91         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
  92                 return 0;
  93         case PIPE_CAP_MAX_FS_INSTRUCTIONS:
  94         case PIPE_CAP_MAX_FS_ALU_INSTRUCTIONS:
  95         case PIPE_CAP_MAX_FS_TEX_INSTRUCTIONS:
  96         case PIPE_CAP_MAX_FS_TEX_INDIRECTIONS:
  97                 return 4096;
  98         case PIPE_CAP_MAX_FS_CONTROL_FLOW_DEPTH:
  99                 /* FIXME: is it the dynamic (nv30:0/nv40:24) or the static
 100                    value (nv30:0/nv40:4) ? */
 101                 return screen->is_nv4x ? 4 : 0;
 102         case PIPE_CAP_MAX_FS_INPUTS:
 103                 return 10;
 104         case PIPE_CAP_MAX_FS_CONSTS:
 105                 return screen->is_nv4x ? 224 : 32;
 106         case PIPE_CAP_MAX_FS_TEMPS:
 107                 return 32;
 108         case PIPE_CAP_MAX_FS_ADDRS:
 109                 return screen->is_nv4x ? 1 : 0;
 110         case PIPE_CAP_MAX_FS_PREDS:
 111                 return screen->is_nv4x ? 1 : 0;
 112         case PIPE_CAP_MAX_VS_INSTRUCTIONS:
 113         case PIPE_CAP_MAX_VS_ALU_INSTRUCTIONS:
 114                 return screen->is_nv4x ? 512 : 256;
 115         case PIPE_CAP_MAX_VS_TEX_INSTRUCTIONS:
 116         case PIPE_CAP_MAX_VS_TEX_INDIRECTIONS:
 117                 return screen->is_nv4x ? 512 : 0;
 118         case PIPE_CAP_MAX_VS_CONTROL_FLOW_DEPTH:
 119                 /* FIXME: is it the dynamic (nv30:24/nv40:24) or the static
 120                    value (nv30:1/nv40:4) ? */
 121                 return screen->is_nv4x ? 4 : 1;
 122         case PIPE_CAP_MAX_VS_INPUTS:
 123                 return 16;
 124         case PIPE_CAP_MAX_VS_CONSTS:
 125                 return 256;
 126         case PIPE_CAP_MAX_VS_TEMPS:
 127                 return screen->is_nv4x ? 32 : 13;
 128         case PIPE_CAP_MAX_VS_ADDRS:
 129                 return 2;
 130         case PIPE_CAP_MAX_VS_PREDS:
 131                 return screen->is_nv4x ? 1 : 0;
 132         case PIPE_CAP_GEOMETRY_SHADER4:
 133                 return 0;
 134         default:
 135                 NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
 136                 return 0;
 137         }
 138 }
 139
 140 static float
 141 nvfx_screen_get_paramf(struct pipe_screen *pscreen, enum pipe_cap param)
 142 {
 143         struct nvfx_screen *screen = nvfx_screen(pscreen);
 144
 145         switch (param) {
 146         case PIPE_CAP_MAX_LINE_WIDTH:
 147         case PIPE_CAP_MAX_LINE_WIDTH_AA:
 148                 return 10.0;
 149         case PIPE_CAP_MAX_POINT_WIDTH:
 150         case PIPE_CAP_MAX_POINT_WIDTH_AA:
 151                 return 64.0;
 152         case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 153                 return screen->is_nv4x ? 16.0 : 8.0;
 154         case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 155                 return screen->is_nv4x ? 16.0 : 4.0;
 156         default:
 157                 NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
 158                 return 0.0;
 159         }
 160 }
 161
 162 static boolean
 163 nvfx_screen_surface_format_supported(struct pipe_screen *pscreen,
 164                                      enum pipe_format format,
 165                                      enum pipe_texture_target target,
 166                                      unsigned sample_count,
 167                                      unsigned tex_usage, unsigned geom_flags)
 168 {
 169         struct nvfx_screen *screen = nvfx_screen(pscreen);
 170         struct pipe_surface *front = ((struct nouveau_winsys *) pscreen->winsys)->front;
 171
 172          if (sample_count > 1)
 173                 return FALSE;
 174
 175         if (tex_usage & PIPE_BIND_RENDER_TARGET) {
 176                 switch (format) {
 177                 case PIPE_FORMAT_B8G8R8A8_UNORM:
 178                 case PIPE_FORMAT_B8G8R8X8_UNORM:
 179                 case PIPE_FORMAT_B5G6R5_UNORM:
 180                         return TRUE;
 181                 default:
 182                         break;
 183                 }
 184         } else
 185         if (tex_usage & PIPE_BIND_DEPTH_STENCIL) {
 186                 switch (format) {
 187                 case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 188                 case PIPE_FORMAT_X8Z24_UNORM:
 189                         return TRUE;
 190                 case PIPE_FORMAT_Z16_UNORM:
 191                         /* TODO: this nv30 limitation probably does not exist */
 192                         if (!screen->is_nv4x && front)
 193                                 return (front->format == PIPE_FORMAT_B5G6R5_UNORM);
 194                         return TRUE;
 195                 default:
 196                         break;
 197                 }
 198         } else {
 199                 switch (format) {
 200                 if (tex_usage & PIPE_BIND_SAMPLER_VIEW) {
 201                         switch (format) {
 202                         case PIPE_FORMAT_DXT1_RGB:
 203                         case PIPE_FORMAT_DXT1_RGBA:
 204                         case PIPE_FORMAT_DXT3_RGBA:
 205                         case PIPE_FORMAT_DXT5_RGBA:
 206                                 return util_format_s3tc_enabled;
 207                         default:
 208                                 break;
 209                         }
 210                 }
 211                 case PIPE_FORMAT_B8G8R8A8_UNORM:
 212                 case PIPE_FORMAT_B8G8R8X8_UNORM:
 213                 case PIPE_FORMAT_B5G5R5A1_UNORM:
 214                 case PIPE_FORMAT_B4G4R4A4_UNORM:
 215                 case PIPE_FORMAT_B5G6R5_UNORM:
 216                 case PIPE_FORMAT_L8_UNORM:
 217                 case PIPE_FORMAT_A8_UNORM:
 218                 case PIPE_FORMAT_I8_UNORM:
 219                 case PIPE_FORMAT_L8A8_UNORM:
 220                 case PIPE_FORMAT_Z16_UNORM:
 221                 case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 222                         return TRUE;
 223                 /* TODO: does nv30 support this? */
 224                 case PIPE_FORMAT_R16_SNORM:
 225                         return !!screen->is_nv4x;
 226                 default:
 227                         break;
 228                 }
 229         }
 230
 231         return FALSE;
 232 }
 233
 234
 235 static void
 236 nvfx_screen_destroy(struct pipe_screen *pscreen)
 237 {
 238         struct nvfx_screen *screen = nvfx_screen(pscreen);
 239
 240         nouveau_resource_destroy(&screen->vp_exec_heap);
 241         nouveau_resource_destroy(&screen->vp_data_heap);
 242         nouveau_resource_destroy(&screen->query_heap);
 243         nouveau_notifier_free(&screen->query);
 244         nouveau_notifier_free(&screen->sync);
 245         nouveau_grobj_free(&screen->eng3d);
 246         nv04_surface_2d_takedown(&screen->eng2d);
 247
 248         nouveau_screen_fini(&screen->base);
 249
 250         FREE(pscreen);
 251 }
 252
 253 static void nv30_screen_init(struct nvfx_screen *screen)
 254 {
 255         struct nouveau_channel *chan = screen->base.channel;
 256         int i;
 257
 258         /* TODO: perhaps we should do some of this on nv40 too? */
 259         for (i=1; i<8; i++) {
 260                 OUT_RING(chan, RING_3D(NV34TCL_VIEWPORT_CLIP_HORIZ(i), 1));
 261                 OUT_RING(chan, 0);
 262                 OUT_RING(chan, RING_3D(NV34TCL_VIEWPORT_CLIP_VERT(i), 1));
 263                 OUT_RING(chan, 0);
 264         }
 265
 266         OUT_RING(chan, RING_3D(0x220, 1));
 267         OUT_RING(chan, 1);
 268
 269         OUT_RING(chan, RING_3D(0x03b0, 1));
 270         OUT_RING(chan, 0x00100000);
 271         OUT_RING(chan, RING_3D(0x1454, 1));
 272         OUT_RING(chan, 0);
 273         OUT_RING(chan, RING_3D(0x1d80, 1));
 274         OUT_RING(chan, 3);
 275         OUT_RING(chan, RING_3D(0x1450, 1));
 276         OUT_RING(chan, 0x00030004);
 277
 278         /* NEW */
 279         OUT_RING(chan, RING_3D(0x1e98, 1));
 280         OUT_RING(chan, 0);
 281         OUT_RING(chan, RING_3D(0x17e0, 3));
 282         OUT_RING(chan, fui(0.0));
 283         OUT_RING(chan, fui(0.0));
 284         OUT_RING(chan, fui(1.0));
 285         OUT_RING(chan, RING_3D(0x1f80, 16));
 286         for (i=0; i<16; i++) {
 287                 OUT_RING(chan, (i==8) ? 0x0000ffff : 0);
 288         }
 289
 290         OUT_RING(chan, RING_3D(0x120, 3));
 291         OUT_RING(chan, 0);
 292         OUT_RING(chan, 1);
 293         OUT_RING(chan, 2);
 294
 295         OUT_RING(chan, RING_3D(0x1d88, 1));
 296         OUT_RING(chan, 0x00001200);
 297
 298         OUT_RING(chan, RING_3D(NV34TCL_RC_ENABLE, 1));
 299         OUT_RING(chan, 0);
 300
 301         OUT_RING(chan, RING_3D(NV34TCL_DEPTH_RANGE_NEAR, 2));
 302         OUT_RING(chan, fui(0.0));
 303         OUT_RING(chan, fui(1.0));
 304
 305         OUT_RING(chan, RING_3D(NV34TCL_MULTISAMPLE_CONTROL, 1));
 306         OUT_RING(chan, 0xffff0000);
 307
 308         /* enables use of vp rather than fixed-function somehow */
 309         OUT_RING(chan, RING_3D(0x1e94, 1));
 310         OUT_RING(chan, 0x13);
 311 }
 312
 313 static void nv40_screen_init(struct nvfx_screen *screen)
 314 {
 315         struct nouveau_channel *chan = screen->base.channel;
 316
 317         OUT_RING(chan, RING_3D(NV40TCL_DMA_COLOR2, 2));
 318         OUT_RING(chan, screen->base.channel->vram->handle);
 319         OUT_RING(chan, screen->base.channel->vram->handle);
 320
 321         OUT_RING(chan, RING_3D(0x1ea4, 3));
 322         OUT_RING(chan, 0x00000010);
 323         OUT_RING(chan, 0x01000100);
 324         OUT_RING(chan, 0xff800006);
 325
 326         /* vtxprog output routing */
 327         OUT_RING(chan, RING_3D(0x1fc4, 1));
 328         OUT_RING(chan, 0x06144321);
 329         OUT_RING(chan, RING_3D(0x1fc8, 2));
 330         OUT_RING(chan, 0xedcba987);
 331         OUT_RING(chan, 0x00000021);
 332         OUT_RING(chan, RING_3D(0x1fd0, 1));
 333         OUT_RING(chan, 0x00171615);
 334         OUT_RING(chan, RING_3D(0x1fd4, 1));
 335         OUT_RING(chan, 0x001b1a19);
 336
 337         OUT_RING(chan, RING_3D(0x1ef8, 1));
 338         OUT_RING(chan, 0x0020ffff);
 339         OUT_RING(chan, RING_3D(0x1d64, 1));
 340         OUT_RING(chan, 0x00d30000);
 341         OUT_RING(chan, RING_3D(0x1e94, 1));
 342         OUT_RING(chan, 0x00000001);
 343 }
 344
 345 static unsigned
 346 nvfx_screen_get_vertex_buffer_flags(struct nvfx_screen* screen)
 347 {
 348         int vram_hack_default = 0;
 349         int vram_hack;
 350         // TODO: this is a bit of a guess; also add other cards that may need this hack.
 351         // It may also depend on the specific card or the AGP/PCIe chipset.
 352         if(screen->base.device->chipset == 0x47 /* G70 */
 353                 || screen->base.device->chipset == 0x49 /* G71 */
 354                 || screen->base.device->chipset == 0x46 /* G72 */
 355                 )
 356                 vram_hack_default = 1;
 357         vram_hack = debug_get_bool_option("NOUVEAU_VTXIDX_IN_VRAM", vram_hack_default);
 358
 359 #ifdef DEBUG
 360         if(!vram_hack)
 361         {
 362                 fprintf(stderr, "Some systems may experience graphics corruption due to randomly misplaced vertices.\n"
 363                         "If this is happening, export NOUVEAU_VTXIDX_IN_VRAM=1 may reduce or eliminate the problem\n");
 364         }
 365         else
 366         {
 367                 fprintf(stderr, "A performance reducing hack is being used to help avoid graphics corruption.\n"
 368                         "You can try export NOUVEAU_VTXIDX_IN_VRAM=0 to disable it.\n");
 369         }
 370 #endif
 371
 372         return vram_hack ? NOUVEAU_BO_VRAM : NOUVEAU_BO_GART;
 373 }
 374
 375 struct pipe_screen *
 376 nvfx_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 377 {
 378         static const unsigned query_sizes[] = {(4096 - 4 * 32) / 32, 3 * 1024 / 32, 2 * 1024 / 32, 1024 / 32};
 379         struct nvfx_screen *screen = CALLOC_STRUCT(nvfx_screen);
 380         struct nouveau_channel *chan;
 381         struct pipe_screen *pscreen;
 382         unsigned eng3d_class = 0;
 383         int ret, i;
 384
 385         if (!screen)
 386                 return NULL;
 387
 388         pscreen = &screen->base.base;
 389
 390         ret = nouveau_screen_init(&screen->base, dev);
 391         if (ret) {
 392                 nvfx_screen_destroy(pscreen);
 393                 return NULL;
 394         }
 395         chan = screen->base.channel;
 396
 397         pscreen->winsys = ws;
 398         pscreen->destroy = nvfx_screen_destroy;
 399         pscreen->get_param = nvfx_screen_get_param;
 400         pscreen->get_paramf = nvfx_screen_get_paramf;
 401         pscreen->is_format_supported = nvfx_screen_surface_format_supported;
 402         pscreen->context_create = nvfx_create;
 403
 404         switch (dev->chipset & 0xf0) {
 405         case 0x30:
 406                 if (NV30TCL_CHIPSET_3X_MASK & (1 << (dev->chipset & 0x0f)))
 407                         eng3d_class = 0x0397;
 408                 else if (NV34TCL_CHIPSET_3X_MASK & (1 << (dev->chipset & 0x0f)))
 409                         eng3d_class = 0x0697;
 410                 else if (NV35TCL_CHIPSET_3X_MASK & (1 << (dev->chipset & 0x0f)))
 411                         eng3d_class = 0x0497;
 412                 break;
 413         case 0x40:
 414                 if (NV4X_GRCLASS4097_CHIPSETS & (1 << (dev->chipset & 0x0f)))
 415                         eng3d_class = NV40TCL;
 416                 else if (NV4X_GRCLASS4497_CHIPSETS & (1 << (dev->chipset & 0x0f)))
 417                         eng3d_class = NV44TCL;
 418                 screen->is_nv4x = ~0;
 419                 break;
 420         case 0x60:
 421                 if (NV6X_GRCLASS4497_CHIPSETS & (1 << (dev->chipset & 0x0f)))
 422                         eng3d_class = NV44TCL;
 423                 screen->is_nv4x = ~0;
 424                 break;
 425         }
 426
 427         if (!eng3d_class) {
 428                 NOUVEAU_ERR("Unknown nv3x/nv4x chipset: nv%02x\n", dev->chipset);
 429                 return NULL;
 430         }
 431
 432         screen->force_swtnl = debug_get_bool_option("NOUVEAU_SWTNL", FALSE);
 433
 434         screen->vertex_buffer_reloc_flags = nvfx_screen_get_vertex_buffer_flags(screen);
 435
 436         /* surely both nv3x and nv44 support index buffers too: find out how and test that */
 437         if(eng3d_class == NV40TCL)
 438                 screen->index_buffer_reloc_flags = screen->vertex_buffer_reloc_flags;
 439
 440         if(!screen->force_swtnl && screen->vertex_buffer_reloc_flags == screen->index_buffer_reloc_flags)
 441                 screen->base.vertex_buffer_flags = screen->base.index_buffer_flags = screen->vertex_buffer_reloc_flags;
 442
 443         nvfx_screen_init_resource_functions(pscreen);
 444
 445         ret = nouveau_grobj_alloc(chan, 0xbeef3097, eng3d_class, &screen->eng3d);
 446         if (ret) {
 447                 NOUVEAU_ERR("Error creating 3D object: %d\n", ret);
 448                 return FALSE;
 449         }
 450
 451         /* 2D engine setup */
 452         screen->eng2d = nv04_surface_2d_init(&screen->base);
 453         screen->eng2d->buf = nvfx_surface_buffer;
 454
 455         /* Notifier for sync purposes */
 456         ret = nouveau_notifier_alloc(chan, 0xbeef0301, 1, &screen->sync);
 457         if (ret) {
 458                 NOUVEAU_ERR("Error creating notifier object: %d\n", ret);
 459                 nvfx_screen_destroy(pscreen);
 460                 return NULL;
 461         }
 462
 463         /* Query objects */
 464         for(i = 0; i < sizeof(query_sizes) / sizeof(query_sizes[0]); ++i)
 465         {
 466                 ret = nouveau_notifier_alloc(chan, 0xbeef0302, query_sizes[i], &screen->query);
 467                 if(!ret)
 468                         break;
 469         }
 470
 471         if (ret) {
 472                 NOUVEAU_ERR("Error initialising query objects: %d\n", ret);
 473                 nvfx_screen_destroy(pscreen);
 474                 return NULL;
 475         }
 476
 477         ret = nouveau_resource_init(&screen->query_heap, 0, query_sizes[i]);
 478         if (ret) {
 479                 NOUVEAU_ERR("Error initialising query object heap: %d\n", ret);
 480                 nvfx_screen_destroy(pscreen);
 481                 return NULL;
 482         }
 483
 484         LIST_INITHEAD(&screen->query_list);
 485
 486         /* Vtxprog resources */
 487         if (nouveau_resource_init(&screen->vp_exec_heap, 0, screen->is_nv4x ? 512 : 256) ||
 488             nouveau_resource_init(&screen->vp_data_heap, 0, 256)) {
 489                 nvfx_screen_destroy(pscreen);
 490                 return NULL;
 491         }
 492
 493         BIND_RING(chan, screen->eng3d, 7);
 494
 495         /* Static eng3d initialisation */
 496         /* note that we just started using the channel, so we must have space in the pushbuffer */
 497         OUT_RING(chan, RING_3D(NV34TCL_DMA_NOTIFY, 1));
 498         OUT_RING(chan, screen->sync->handle);
 499         OUT_RING(chan, RING_3D(NV34TCL_DMA_TEXTURE0, 2));
 500         OUT_RING(chan, chan->vram->handle);
 501         OUT_RING(chan, chan->gart->handle);
 502         OUT_RING(chan, RING_3D(NV34TCL_DMA_COLOR1, 1));
 503         OUT_RING(chan, chan->vram->handle);
 504         OUT_RING(chan, RING_3D(NV34TCL_DMA_COLOR0, 2));
 505         OUT_RING(chan, chan->vram->handle);
 506         OUT_RING(chan, chan->vram->handle);
 507         OUT_RING(chan, RING_3D(NV34TCL_DMA_VTXBUF0, 2));
 508         OUT_RING(chan, chan->vram->handle);
 509         OUT_RING(chan, chan->gart->handle);
 510
 511         OUT_RING(chan, RING_3D(NV34TCL_DMA_FENCE, 2));
 512         OUT_RING(chan, 0);
 513         OUT_RING(chan, screen->query->handle);
 514
 515         OUT_RING(chan, RING_3D(NV34TCL_DMA_IN_MEMORY7, 2));
 516         OUT_RING(chan, chan->vram->handle);
 517         OUT_RING(chan, chan->vram->handle);
 518
 519         if(!screen->is_nv4x)
 520                 nv30_screen_init(screen);
 521         else
 522                 nv40_screen_init(screen);
 523
 524         return pscreen;
 525 }