src/mesa/drivers/dri/mga/mga_xmesa.c

   1 /*
   2  * Copyright 2000-2001 VA Linux Systems, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file mga_xmesa.c
  27  * MGA screen and context initialization / creation code.
  28  *
  29  * \author Keith Whitwell <keith@tungstengraphics.com>
  30  */
  31
  32 #include <stdlib.h>
  33 #include <stdint.h>
  34 #include "drm.h"
  35 #include "mga_drm.h"
  36 #include "mga_xmesa.h"
  37 #include "main/context.h"
  38 #include "main/matrix.h"
  39 #include "main/simple_list.h"
  40 #include "main/imports.h"
  41 #include "main/framebuffer.h"
  42 #include "main/renderbuffer.h"
  43
  44 #include "swrast/swrast.h"
  45 #include "swrast_setup/swrast_setup.h"
  46 #include "tnl/tnl.h"
  47 #include "vbo/vbo.h"
  48
  49 #include "tnl/t_pipeline.h"
  50
  51 #include "drivers/common/driverfuncs.h"
  52
  53 #include "mgadd.h"
  54 #include "mgastate.h"
  55 #include "mgatex.h"
  56 #include "mgaspan.h"
  57 #include "mgaioctl.h"
  58 #include "mgatris.h"
  59 #include "mgavb.h"
  60 #include "mgapixel.h"
  61 #include "mga_xmesa.h"
  62 #include "mga_dri.h"
  63
  64 #include "utils.h"
  65 #include "vblank.h"
  66
  67 #include "main/extensions.h"
  68 #include "drirenderbuffer.h"
  69
  70 #include "GL/internal/dri_interface.h"
  71
  72 #define need_GL_ARB_vertex_program
  73 #define need_GL_EXT_fog_coord
  74 #define need_GL_EXT_gpu_program_parameters
  75 #define need_GL_EXT_multi_draw_arrays
  76 #define need_GL_EXT_secondary_color
  77 #if 0
  78 #define need_GL_EXT_paletted_texture
  79 #endif
  80 #define need_GL_APPLE_vertex_array_object
  81 #define need_GL_NV_vertex_program
  82 #include "extension_helper.h"
  83
  84 /* MGA configuration
  85  */
  86 #include "xmlpool.h"
  87
  88 PUBLIC const char __driConfigOptions[] =
  89 DRI_CONF_BEGIN
  90     DRI_CONF_SECTION_PERFORMANCE
  91         DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_0)
  92     DRI_CONF_SECTION_END
  93     DRI_CONF_SECTION_QUALITY
  94         DRI_CONF_TEXTURE_DEPTH(DRI_CONF_TEXTURE_DEPTH_FB)
  95         DRI_CONF_COLOR_REDUCTION(DRI_CONF_COLOR_REDUCTION_DITHER)
  96     DRI_CONF_SECTION_END
  97     DRI_CONF_SECTION_SOFTWARE
  98         DRI_CONF_ARB_VERTEX_PROGRAM(true)
  99         DRI_CONF_NV_VERTEX_PROGRAM(true)
 100     DRI_CONF_SECTION_END
 101     DRI_CONF_SECTION_DEBUG
 102         DRI_CONF_NO_RAST(false)
 103     DRI_CONF_SECTION_END
 104 DRI_CONF_END;
 105 static const GLuint __driNConfigOptions = 6;
 106
 107 #ifndef MGA_DEBUG
 108 int MGA_DEBUG = 0;
 109 #endif
 110
 111 static const __DRIconfig **
 112 mgaFillInModes( __DRIscreenPrivate *psp,
 113                 unsigned pixel_bits, unsigned depth_bits,
 114                 unsigned stencil_bits, GLboolean have_back_buffer )
 115 {
 116     __DRIconfig **configs;
 117     __GLcontextModes * m;
 118     unsigned depth_buffer_factor;
 119     unsigned back_buffer_factor;
 120     GLenum fb_format;
 121     GLenum fb_type;
 122     int i;
 123
 124     /* GLX_SWAP_COPY_OML is only supported because the MGA driver doesn't
 125      * support pageflipping at all.
 126      */
 127     static const GLenum back_buffer_modes[] = {
 128         GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 129     };
 130
 131     uint8_t depth_bits_array[3];
 132     uint8_t stencil_bits_array[3];
 133
 134
 135     depth_bits_array[0] = 0;
 136     depth_bits_array[1] = depth_bits;
 137     depth_bits_array[2] = depth_bits;
 138
 139     /* Just like with the accumulation buffer, always provide some modes
 140      * with a stencil buffer.  It will be a sw fallback, but some apps won't
 141      * care about that.
 142      */
 143     stencil_bits_array[0] = 0;
 144     stencil_bits_array[1] = 0;
 145     stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
 146
 147     depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
 148     back_buffer_factor  = (have_back_buffer) ? 2 : 1;
 149
 150     if ( pixel_bits == 16 ) {
 151         fb_format = GL_RGB;
 152         fb_type = GL_UNSIGNED_SHORT_5_6_5;
 153     }
 154     else {
 155         fb_format = GL_BGR;
 156         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 157     }
 158
 159     configs = driCreateConfigs(fb_format, fb_type,
 160                                depth_bits_array, stencil_bits_array,
 161                                depth_buffer_factor,
 162                                back_buffer_modes, back_buffer_factor);
 163     if (configs == NULL) {
 164         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 165                  __func__, __LINE__ );
 166         return NULL;
 167     }
 168
 169    /* Mark the visual as slow if there are "fake" stencil bits.
 170     */
 171    for (i = 0; configs[i]; i++) {
 172       m = &configs[i]->modes;
 173       if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
 174          m->visualRating = GLX_SLOW_CONFIG;
 175       }
 176    }
 177
 178    return (const __DRIconfig **) configs;
 179 }
 180
 181 const __DRIextension *mgaScreenExtensions[] = {
 182     &driReadDrawableExtension,
 183     &driSwapControlExtension.base,
 184     &driFrameTrackingExtension.base,
 185     &driMediaStreamCounterExtension.base,
 186     NULL
 187 };
 188
 189 static GLboolean
 190 mgaInitDriver(__DRIscreenPrivate *sPriv)
 191 {
 192    mgaScreenPrivate *mgaScreen;
 193    MGADRIPtr         serverInfo = (MGADRIPtr)sPriv->pDevPriv;
 194
 195    if (sPriv->devPrivSize != sizeof(MGADRIRec)) {
 196       fprintf(stderr,"\nERROR!  sizeof(MGADRIRec) does not match passed size from device driver\n");
 197       return GL_FALSE;
 198    }
 199
 200    /* Allocate the private area */
 201    mgaScreen = (mgaScreenPrivate *)MALLOC(sizeof(mgaScreenPrivate));
 202    if (!mgaScreen) {
 203       __driUtilMessage("Couldn't malloc screen struct");
 204       return GL_FALSE;
 205    }
 206
 207    mgaScreen->sPriv = sPriv;
 208    sPriv->private = (void *)mgaScreen;
 209
 210    if (sPriv->drm_version.minor >= 1) {
 211       int ret;
 212       drm_mga_getparam_t gp;
 213
 214       gp.param = MGA_PARAM_IRQ_NR;
 215       gp.value = &mgaScreen->irq;
 216       mgaScreen->irq = 0;
 217
 218       ret = drmCommandWriteRead( sPriv->fd, DRM_MGA_GETPARAM,
 219                                     &gp, sizeof(gp));
 220       if (ret) {
 221             fprintf(stderr, "drmMgaGetParam (MGA_PARAM_IRQ_NR): %d\n", ret);
 222             FREE(mgaScreen);
 223             sPriv->private = NULL;
 224             return GL_FALSE;
 225       }
 226    }
 227
 228    sPriv->extensions = mgaScreenExtensions;
 229
 230    if (serverInfo->chipset != MGA_CARD_TYPE_G200 &&
 231        serverInfo->chipset != MGA_CARD_TYPE_G400) {
 232       FREE(mgaScreen);
 233       sPriv->private = NULL;
 234       __driUtilMessage("Unrecognized chipset");
 235       return GL_FALSE;
 236    }
 237
 238
 239    mgaScreen->chipset = serverInfo->chipset;
 240    mgaScreen->cpp = serverInfo->cpp;
 241
 242    mgaScreen->agpMode = serverInfo->agpMode;
 243
 244    mgaScreen->frontPitch = serverInfo->frontPitch;
 245    mgaScreen->frontOffset = serverInfo->frontOffset;
 246    mgaScreen->backOffset = serverInfo->backOffset;
 247    mgaScreen->backPitch  =  serverInfo->backPitch;
 248    mgaScreen->depthOffset = serverInfo->depthOffset;
 249    mgaScreen->depthPitch  =  serverInfo->depthPitch;
 250
 251
 252    /* The only reason that the MMIO region needs to be accessable and the
 253     * primary DMA region base address needs to be known is so that the driver
 254     * can busy wait for certain DMA operations to complete (see
 255     * mgaWaitForFrameCompletion in mgaioctl.c).
 256     *
 257     * Starting with MGA DRM version 3.2, these are completely unneeded as
 258     * there is a new, in-kernel mechanism for handling the wait.
 259     */
 260
 261    if (mgaScreen->sPriv->drm_version.minor < 2) {
 262       mgaScreen->mmio.handle = serverInfo->registers.handle;
 263       mgaScreen->mmio.size = serverInfo->registers.size;
 264       if ( drmMap( sPriv->fd,
 265                    mgaScreen->mmio.handle, mgaScreen->mmio.size,
 266                    &mgaScreen->mmio.map ) < 0 ) {
 267          FREE( mgaScreen );
 268          sPriv->private = NULL;
 269          __driUtilMessage( "Couldn't map MMIO registers" );
 270          return GL_FALSE;
 271       }
 272
 273       mgaScreen->primary.handle = serverInfo->primary.handle;
 274       mgaScreen->primary.size = serverInfo->primary.size;
 275    }
 276    else {
 277       (void) memset( & mgaScreen->primary, 0, sizeof( mgaScreen->primary ) );
 278       (void) memset( & mgaScreen->mmio, 0, sizeof( mgaScreen->mmio ) );
 279    }
 280
 281    mgaScreen->textureOffset[MGA_CARD_HEAP] = serverInfo->textureOffset;
 282    mgaScreen->textureOffset[MGA_AGP_HEAP] = (serverInfo->agpTextureOffset |
 283                                              PDEA_pagpxfer_enable | 1);
 284
 285    mgaScreen->textureSize[MGA_CARD_HEAP] = serverInfo->textureSize;
 286    mgaScreen->textureSize[MGA_AGP_HEAP] = serverInfo->agpTextureSize;
 287
 288
 289    /* The texVirtual array stores the base addresses in the CPU's address
 290     * space of the texture memory pools.  The base address of the on-card
 291     * memory pool is calculated as an offset of the base of video memory.  The
 292     * AGP texture pool has to be mapped into the processes address space by
 293     * the DRM.
 294     */
 295
 296    mgaScreen->texVirtual[MGA_CARD_HEAP] = (char *)(mgaScreen->sPriv->pFB +
 297                                            serverInfo->textureOffset);
 298
 299    if ( serverInfo->agpTextureSize > 0 ) {
 300       if (drmMap(sPriv->fd, serverInfo->agpTextureOffset,
 301                  serverInfo->agpTextureSize,
 302                  (drmAddress *)&mgaScreen->texVirtual[MGA_AGP_HEAP]) != 0) {
 303          FREE(mgaScreen);
 304          sPriv->private = NULL;
 305          __driUtilMessage("Couldn't map agptexture region");
 306          return GL_FALSE;
 307       }
 308    }
 309
 310
 311    /* For calculating setupdma addresses.
 312     */
 313
 314    mgaScreen->bufs = drmMapBufs(sPriv->fd);
 315    if (!mgaScreen->bufs) {
 316       FREE(mgaScreen);
 317       sPriv->private = NULL;
 318       __driUtilMessage("Couldn't map dma buffers");
 319       return GL_FALSE;
 320    }
 321    mgaScreen->sarea_priv_offset = serverInfo->sarea_priv_offset;
 322
 323    /* parse information in __driConfigOptions */
 324    driParseOptionInfo (&mgaScreen->optionCache,
 325                        __driConfigOptions, __driNConfigOptions);
 326
 327    return GL_TRUE;
 328 }
 329
 330
 331 static void
 332 mgaDestroyScreen(__DRIscreenPrivate *sPriv)
 333 {
 334    mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *) sPriv->private;
 335
 336    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 337       fprintf(stderr, "mgaDestroyScreen\n");
 338
 339    drmUnmapBufs(mgaScreen->bufs);
 340
 341
 342    /* free all option information */
 343    driDestroyOptionInfo (&mgaScreen->optionCache);
 344
 345    FREE(mgaScreen);
 346    sPriv->private = NULL;
 347 }
 348
 349
 350 extern const struct tnl_pipeline_stage _mga_render_stage;
 351
 352 static const struct tnl_pipeline_stage *mga_pipeline[] = {
 353    &_tnl_vertex_transform_stage,
 354    &_tnl_normal_transform_stage,
 355    &_tnl_lighting_stage,
 356    &_tnl_fog_coordinate_stage,
 357    &_tnl_texgen_stage,
 358    &_tnl_texture_transform_stage,
 359    &_tnl_vertex_program_stage,
 360
 361                                 /* REMOVE: point attenuation stage */
 362 #if 0
 363    &_mga_render_stage,          /* ADD: unclipped rastersetup-to-dma */
 364                                 /* Need new ioctl for wacceptseq */
 365 #endif
 366    &_tnl_render_stage,
 367    0,
 368 };
 369
 370
 371 static const struct dri_extension g400_extensions[] =
 372 {
 373    { "GL_ARB_multitexture",           NULL },
 374    { "GL_ARB_texture_env_add",        NULL },
 375    { "GL_ARB_texture_env_combine",    NULL },
 376    { "GL_ARB_texture_env_crossbar",   NULL },
 377    { "GL_EXT_texture_env_combine",    NULL },
 378    { "GL_EXT_texture_edge_clamp",     NULL },
 379    { "GL_ATI_texture_env_combine3",   NULL },
 380    { NULL,                            NULL }
 381 };
 382
 383 static const struct dri_extension card_extensions[] =
 384 {
 385    { "GL_ARB_texture_rectangle",      NULL },
 386    { "GL_EXT_blend_logic_op",         NULL },
 387    { "GL_EXT_fog_coord",              GL_EXT_fog_coord_functions },
 388    { "GL_EXT_multi_draw_arrays",      GL_EXT_multi_draw_arrays_functions },
 389    /* paletted_textures currently doesn't work, but we could fix them later */
 390 #if defined( need_GL_EXT_paletted_texture )
 391    { "GL_EXT_shared_texture_palette", NULL },
 392    { "GL_EXT_paletted_texture",       GL_EXT_paletted_texture_functions },
 393 #endif
 394    { "GL_EXT_secondary_color",        GL_EXT_secondary_color_functions },
 395    { "GL_EXT_stencil_wrap",           NULL },
 396    { "GL_APPLE_vertex_array_object",  GL_APPLE_vertex_array_object_functions },
 397    { "GL_MESA_ycbcr_texture",         NULL },
 398    { "GL_SGIS_generate_mipmap",       NULL },
 399    { NULL,                            NULL }
 400 };
 401
 402 static const struct dri_extension ARB_vp_extensions[] = {
 403    { "GL_ARB_vertex_program",         GL_ARB_vertex_program_functions },
 404    { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
 405    { NULL,                            NULL }
 406 };
 407
 408 static const struct dri_extension NV_vp_extensions[] = {
 409    { "GL_NV_vertex_program",          GL_NV_vertex_program_functions },
 410    { "GL_NV_vertex_program1_1",       NULL },
 411    { NULL,                            NULL }
 412 };
 413
 414 static const struct dri_debug_control debug_control[] =
 415 {
 416     { "fall",  DEBUG_VERBOSE_FALLBACK },
 417     { "tex",   DEBUG_VERBOSE_TEXTURE },
 418     { "ioctl", DEBUG_VERBOSE_IOCTL },
 419     { "verb",  DEBUG_VERBOSE_MSG },
 420     { "dri",   DEBUG_VERBOSE_DRI },
 421     { NULL,    0 }
 422 };
 423
 424
 425 static GLboolean
 426 mgaCreateContext( const __GLcontextModes *mesaVis,
 427                   __DRIcontextPrivate *driContextPriv,
 428                   void *sharedContextPrivate )
 429 {
 430    int i;
 431    unsigned   maxlevels;
 432    GLcontext *ctx, *shareCtx;
 433    mgaContextPtr mmesa;
 434    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 435    mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *)sPriv->private;
 436    drm_mga_sarea_t *saPriv = (drm_mga_sarea_t *)(((char*)sPriv->pSAREA)+
 437                                               mgaScreen->sarea_priv_offset);
 438    struct dd_function_table functions;
 439
 440    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 441       fprintf(stderr, "mgaCreateContext\n");
 442
 443    /* allocate mga context */
 444    mmesa = (mgaContextPtr) CALLOC(sizeof(mgaContext));
 445    if (!mmesa) {
 446       return GL_FALSE;
 447    }
 448
 449    /* Init default driver functions then plug in our Radeon-specific functions
 450     * (the texture functions are especially important)
 451     */
 452    _mesa_init_driver_functions( &functions );
 453    mgaInitDriverFuncs( &functions );
 454    mgaInitTextureFuncs( &functions );
 455    mgaInitIoctlFuncs( &functions );
 456
 457    /* Allocate the Mesa context */
 458    if (sharedContextPrivate)
 459       shareCtx = ((mgaContextPtr) sharedContextPrivate)->glCtx;
 460    else
 461       shareCtx = NULL;
 462    mmesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 463                                        &functions, (void *) mmesa);
 464    if (!mmesa->glCtx) {
 465       FREE(mmesa);
 466       return GL_FALSE;
 467    }
 468    driContextPriv->driverPrivate = mmesa;
 469
 470    /* Init mga state */
 471    mmesa->hHWContext = driContextPriv->hHWContext;
 472    mmesa->driFd = sPriv->fd;
 473    mmesa->driHwLock = &sPriv->pSAREA->lock;
 474
 475    mmesa->mgaScreen = mgaScreen;
 476    mmesa->driScreen = sPriv;
 477    mmesa->sarea = (void *)saPriv;
 478
 479    /* Parse configuration files */
 480    driParseConfigFiles (&mmesa->optionCache, &mgaScreen->optionCache,
 481                         sPriv->myNum, "mga");
 482
 483    (void) memset( mmesa->texture_heaps, 0, sizeof( mmesa->texture_heaps ) );
 484    make_empty_list( & mmesa->swapped );
 485
 486    mmesa->nr_heaps = mgaScreen->texVirtual[MGA_AGP_HEAP] ? 2 : 1;
 487    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 488       mmesa->texture_heaps[i] = driCreateTextureHeap( i, mmesa,
 489             mgaScreen->textureSize[i],
 490             6,
 491             MGA_NR_TEX_REGIONS,
 492             (drmTextureRegionPtr)mmesa->sarea->texList[i],
 493             &mmesa->sarea->texAge[i],
 494             &mmesa->swapped,
 495             sizeof( mgaTextureObject_t ),
 496             (destroy_texture_object_t *) mgaDestroyTexObj );
 497    }
 498
 499    /* Set the maximum texture size small enough that we can guarentee
 500     * that both texture units can bind a maximal texture and have them
 501     * on the card at once.
 502     */
 503    ctx = mmesa->glCtx;
 504    if ( mgaScreen->chipset == MGA_CARD_TYPE_G200 ) {
 505       ctx->Const.MaxTextureUnits = 1;
 506       ctx->Const.MaxTextureImageUnits = 1;
 507       ctx->Const.MaxTextureCoordUnits = 1;
 508       maxlevels = G200_TEX_MAXLEVELS;
 509
 510    }
 511    else {
 512       ctx->Const.MaxTextureUnits = 2;
 513       ctx->Const.MaxTextureImageUnits = 2;
 514       ctx->Const.MaxTextureCoordUnits = 2;
 515       maxlevels = G400_TEX_MAXLEVELS;
 516    }
 517
 518    driCalculateMaxTextureLevels( mmesa->texture_heaps,
 519                                  mmesa->nr_heaps,
 520                                  & ctx->Const,
 521                                  4,
 522                                  11, /* max 2D texture size is 2048x2048 */
 523                                  0,  /* 3D textures unsupported. */
 524                                  0,  /* cube textures unsupported. */
 525                                  11, /* max texture rect size is 2048x2048 */
 526                                  maxlevels,
 527                                  GL_FALSE,
 528                                  0 );
 529
 530    ctx->Const.MinLineWidth = 1.0;
 531    ctx->Const.MinLineWidthAA = 1.0;
 532    ctx->Const.MaxLineWidth = 10.0;
 533    ctx->Const.MaxLineWidthAA = 10.0;
 534    ctx->Const.LineWidthGranularity = 1.0;
 535
 536    mmesa->texture_depth = driQueryOptioni (&mmesa->optionCache,
 537                                            "texture_depth");
 538    if (mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FB)
 539       mmesa->texture_depth = ( mesaVis->rgbBits >= 24 ) ?
 540          DRI_CONF_TEXTURE_DEPTH_32 : DRI_CONF_TEXTURE_DEPTH_16;
 541    mmesa->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 542
 543    switch (mesaVis->depthBits) {
 544    case 16:
 545       mmesa->depth_scale = 1.0/(GLdouble)0xffff;
 546       mmesa->depth_clear_mask = ~0;
 547       mmesa->ClearDepth = 0xffff;
 548       break;
 549    case 24:
 550       mmesa->depth_scale = 1.0/(GLdouble)0xffffff;
 551       if (mmesa->hw_stencil) {
 552          mmesa->depth_clear_mask = 0xffffff00;
 553          mmesa->stencil_clear_mask = 0x000000ff;
 554       } else
 555          mmesa->depth_clear_mask = ~0;
 556       mmesa->ClearDepth = 0xffffff00;
 557       break;
 558    case 32:
 559       mmesa->depth_scale = 1.0/(GLdouble)0xffffffff;
 560       mmesa->depth_clear_mask = ~0;
 561       mmesa->ClearDepth = 0xffffffff;
 562       break;
 563    };
 564
 565    mmesa->haveHwStipple = GL_FALSE;
 566    mmesa->RenderIndex = -1;             /* impossible value */
 567    mmesa->dirty = ~0;
 568    mmesa->vertex_format = 0;
 569    mmesa->CurrentTexObj[0] = 0;
 570    mmesa->CurrentTexObj[1] = 0;
 571    mmesa->tmu_source[0] = 0;
 572    mmesa->tmu_source[1] = 1;
 573
 574    mmesa->texAge[0] = 0;
 575    mmesa->texAge[1] = 0;
 576
 577    /* Initialize the software rasterizer and helper modules.
 578     */
 579    _swrast_CreateContext( ctx );
 580    _vbo_CreateContext( ctx );
 581    _tnl_CreateContext( ctx );
 582
 583    _swsetup_CreateContext( ctx );
 584
 585    /* Install the customized pipeline:
 586     */
 587    _tnl_destroy_pipeline( ctx );
 588    _tnl_install_pipeline( ctx, mga_pipeline );
 589
 590    /* Configure swrast and T&L to match hardware characteristics:
 591     */
 592    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 593    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 594    _tnl_allow_pixel_fog( ctx, GL_FALSE );
 595    _tnl_allow_vertex_fog( ctx, GL_TRUE );
 596
 597    mmesa->primary_offset = mmesa->mgaScreen->primary.handle;
 598
 599    ctx->DriverCtx = (void *) mmesa;
 600    mmesa->glCtx = ctx;
 601
 602    driInitExtensions( ctx, card_extensions, GL_FALSE );
 603
 604    if (MGA_IS_G400(MGA_CONTEXT(ctx))) {
 605       driInitExtensions( ctx, g400_extensions, GL_FALSE );
 606    }
 607
 608    if ( driQueryOptionb( &mmesa->optionCache, "arb_vertex_program" ) ) {
 609       driInitExtensions(ctx, ARB_vp_extensions, GL_FALSE);
 610    }
 611
 612    if ( driQueryOptionb( &mmesa->optionCache, "nv_vertex_program" ) ) {
 613       driInitExtensions( ctx, NV_vp_extensions, GL_FALSE );
 614    }
 615
 616
 617    /* XXX these should really go right after _mesa_init_driver_functions() */
 618    mgaDDInitStateFuncs( ctx );
 619    mgaDDInitSpanFuncs( ctx );
 620    mgaDDInitPixelFuncs( ctx );
 621    mgaDDInitTriFuncs( ctx );
 622
 623    mgaInitVB( ctx );
 624    mgaInitState( mmesa );
 625
 626    driContextPriv->driverPrivate = (void *) mmesa;
 627
 628 #if DO_DEBUG
 629    MGA_DEBUG = driParseDebugString( getenv( "MGA_DEBUG" ),
 630                                     debug_control );
 631 #endif
 632
 633    (*sPriv->systemTime->getUST)( & mmesa->swap_ust );
 634
 635    if (driQueryOptionb(&mmesa->optionCache, "no_rast")) {
 636       fprintf(stderr, "disabling 3D acceleration\n");
 637       FALLBACK(mmesa->glCtx, MGA_FALLBACK_DISABLE, 1);
 638    }
 639
 640    return GL_TRUE;
 641 }
 642
 643 static void
 644 mgaDestroyContext(__DRIcontextPrivate *driContextPriv)
 645 {
 646    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 647
 648    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 649       fprintf( stderr, "[%s:%d] mgaDestroyContext start\n",
 650                __FILE__, __LINE__ );
 651
 652    assert(mmesa); /* should never be null */
 653    if (mmesa) {
 654       GLboolean   release_texture_heaps;
 655
 656
 657       release_texture_heaps = (mmesa->glCtx->Shared->RefCount == 1);
 658       _swsetup_DestroyContext( mmesa->glCtx );
 659       _tnl_DestroyContext( mmesa->glCtx );
 660       _vbo_DestroyContext( mmesa->glCtx );
 661       _swrast_DestroyContext( mmesa->glCtx );
 662
 663       mgaFreeVB( mmesa->glCtx );
 664
 665       /* free the Mesa context */
 666       mmesa->glCtx->DriverCtx = NULL;
 667       _mesa_destroy_context(mmesa->glCtx);
 668
 669       if ( release_texture_heaps ) {
 670          /* This share group is about to go away, free our private
 671           * texture object data.
 672           */
 673          int i;
 674
 675          for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 676             driDestroyTextureHeap( mmesa->texture_heaps[ i ] );
 677             mmesa->texture_heaps[ i ] = NULL;
 678          }
 679
 680          assert( is_empty_list( & mmesa->swapped ) );
 681       }
 682
 683       /* free the option cache */
 684       driDestroyOptionCache (&mmesa->optionCache);
 685
 686       FREE(mmesa);
 687    }
 688
 689    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 690       fprintf( stderr, "[%s:%d] mgaDestroyContext done\n",
 691                __FILE__, __LINE__ );
 692 }
 693
 694
 695 static GLboolean
 696 mgaCreateBuffer( __DRIscreenPrivate *driScrnPriv,
 697                  __DRIdrawablePrivate *driDrawPriv,
 698                  const __GLcontextModes *mesaVis,
 699                  GLboolean isPixmap )
 700 {
 701    mgaScreenPrivate *screen = (mgaScreenPrivate *) driScrnPriv->private;
 702
 703    if (isPixmap) {
 704       return GL_FALSE; /* not implemented */
 705    }
 706    else {
 707       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 708                              mesaVis->depthBits != 24);
 709
 710 #if 0
 711       driDrawPriv->driverPrivate = (void *)
 712          _mesa_create_framebuffer(mesaVis,
 713                                   GL_FALSE,  /* software depth buffer? */
 714                                   swStencil,
 715                                   mesaVis->accumRedBits > 0,
 716                                   mesaVis->alphaBits > 0 );
 717 #else
 718       struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
 719
 720       {
 721          driRenderbuffer *frontRb
 722             = driNewRenderbuffer(GL_RGBA,
 723                                  NULL,
 724                                  screen->cpp,
 725                                  screen->frontOffset, screen->frontPitch,
 726                                  driDrawPriv);
 727          mgaSetSpanFunctions(frontRb, mesaVis);
 728          _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
 729       }
 730
 731       if (mesaVis->doubleBufferMode) {
 732          driRenderbuffer *backRb
 733             = driNewRenderbuffer(GL_RGBA,
 734                                  NULL,
 735                                  screen->cpp,
 736                                  screen->backOffset, screen->backPitch,
 737                                  driDrawPriv);
 738          mgaSetSpanFunctions(backRb, mesaVis);
 739          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
 740       }
 741
 742       if (mesaVis->depthBits == 16) {
 743          driRenderbuffer *depthRb
 744             = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
 745                                  NULL,
 746                                  screen->cpp,
 747                                  screen->depthOffset, screen->depthPitch,
 748                                  driDrawPriv);
 749          mgaSetSpanFunctions(depthRb, mesaVis);
 750          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 751       }
 752       else if (mesaVis->depthBits == 24) {
 753          /* XXX is this right? */
 754          if (mesaVis->stencilBits) {
 755             driRenderbuffer *depthRb
 756                = driNewRenderbuffer(GL_DEPTH_COMPONENT24,
 757                                     NULL,
 758                                     screen->cpp,
 759                                     screen->depthOffset, screen->depthPitch,
 760                                     driDrawPriv);
 761             mgaSetSpanFunctions(depthRb, mesaVis);
 762             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 763          }
 764          else {
 765             driRenderbuffer *depthRb
 766                = driNewRenderbuffer(GL_DEPTH_COMPONENT32,
 767                                     NULL,
 768                                     screen->cpp,
 769                                     screen->depthOffset, screen->depthPitch,
 770                                     driDrawPriv);
 771             mgaSetSpanFunctions(depthRb, mesaVis);
 772             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 773          }
 774       }
 775       else if (mesaVis->depthBits == 32) {
 776          driRenderbuffer *depthRb
 777             = driNewRenderbuffer(GL_DEPTH_COMPONENT32,
 778                                  NULL,
 779                                  screen->cpp,
 780                                  screen->depthOffset, screen->depthPitch,
 781                                  driDrawPriv);
 782          mgaSetSpanFunctions(depthRb, mesaVis);
 783          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 784       }
 785
 786       if (mesaVis->stencilBits > 0 && !swStencil) {
 787          driRenderbuffer *stencilRb
 788             = driNewRenderbuffer(GL_STENCIL_INDEX8_EXT,
 789                                  NULL,
 790                                  screen->cpp,
 791                                  screen->depthOffset, screen->depthPitch,
 792                                  driDrawPriv);
 793          mgaSetSpanFunctions(stencilRb, mesaVis);
 794          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
 795       }
 796
 797       _mesa_add_soft_renderbuffers(fb,
 798                                    GL_FALSE, /* color */
 799                                    GL_FALSE, /* depth */
 800                                    swStencil,
 801                                    mesaVis->accumRedBits > 0,
 802                                    GL_FALSE, /* alpha */
 803                                    GL_FALSE /* aux */);
 804       driDrawPriv->driverPrivate = (void *) fb;
 805 #endif
 806
 807       return (driDrawPriv->driverPrivate != NULL);
 808    }
 809 }
 810
 811
 812 static void
 813 mgaDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
 814 {
 815    _mesa_unreference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)));
 816 }
 817
 818 static void
 819 mgaSwapBuffers(__DRIdrawablePrivate *dPriv)
 820 {
 821    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 822       mgaContextPtr mmesa;
 823       GLcontext *ctx;
 824       mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 825       ctx = mmesa->glCtx;
 826
 827       if (ctx->Visual.doubleBufferMode) {
 828          _mesa_notifySwapBuffers( ctx );
 829          mgaCopyBuffer( dPriv );
 830       }
 831    } else {
 832       /* XXX this shouldn't be an error but we can't handle it for now */
 833       _mesa_problem(NULL, "%s: drawable has no context!\n", __FUNCTION__);
 834    }
 835 }
 836
 837 static GLboolean
 838 mgaUnbindContext(__DRIcontextPrivate *driContextPriv)
 839 {
 840    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 841    if (mmesa)
 842       mmesa->dirty = ~0;
 843
 844    return GL_TRUE;
 845 }
 846
 847 /* This looks buggy to me - the 'b' variable isn't used anywhere...
 848  * Hmm - It seems that the drawable is already hooked in to
 849  * driDrawablePriv.
 850  *
 851  * But why are we doing context initialization here???
 852  */
 853 static GLboolean
 854 mgaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 855                __DRIdrawablePrivate *driDrawPriv,
 856                __DRIdrawablePrivate *driReadPriv)
 857 {
 858    if (driContextPriv) {
 859       mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 860
 861       if (mmesa->driDrawable != driDrawPriv) {
 862          if (driDrawPriv->swap_interval == (unsigned)-1) {
 863             driDrawPriv->vblFlags = (mmesa->mgaScreen->irq == 0)
 864                ? VBLANK_FLAG_NO_IRQ
 865                : driGetDefaultVBlankFlags(&mmesa->optionCache);
 866
 867             driDrawableInitVBlank( driDrawPriv );
 868          }
 869
 870          mmesa->driDrawable = driDrawPriv;
 871          mmesa->dirty = ~0;
 872          mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 873       }
 874
 875       mmesa->driReadable = driReadPriv;
 876
 877       _mesa_make_current(mmesa->glCtx,
 878                          (GLframebuffer *) driDrawPriv->driverPrivate,
 879                          (GLframebuffer *) driReadPriv->driverPrivate);
 880    }
 881    else {
 882       _mesa_make_current(NULL, NULL, NULL);
 883    }
 884
 885    return GL_TRUE;
 886 }
 887
 888
 889 void mgaGetLock( mgaContextPtr mmesa, GLuint flags )
 890 {
 891    __DRIdrawablePrivate *dPriv = mmesa->driDrawable;
 892    drm_mga_sarea_t *sarea = mmesa->sarea;
 893    int me = mmesa->hHWContext;
 894    int i;
 895
 896    drmGetLock(mmesa->driFd, mmesa->hHWContext, flags);
 897
 898    DRI_VALIDATE_DRAWABLE_INFO( mmesa->driScreen, dPriv );
 899    if (*(dPriv->pStamp) != mmesa->lastStamp) {
 900       mmesa->lastStamp = *(dPriv->pStamp);
 901       mmesa->SetupNewInputs |= VERT_BIT_POS;
 902       mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 903       mgaUpdateRects( mmesa, (MGA_FRONT|MGA_BACK) );
 904       driUpdateFramebufferSize(mmesa->glCtx, dPriv);
 905    }
 906
 907    mmesa->dirty |= MGA_UPLOAD_CONTEXT | MGA_UPLOAD_CLIPRECTS;
 908
 909    mmesa->sarea->dirty |= MGA_UPLOAD_CONTEXT;
 910
 911    if (sarea->ctxOwner != me) {
 912       mmesa->dirty |= (MGA_UPLOAD_CONTEXT | MGA_UPLOAD_TEX0 |
 913                        MGA_UPLOAD_TEX1 | MGA_UPLOAD_PIPE);
 914       sarea->ctxOwner=me;
 915    }
 916
 917    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 918       DRI_AGE_TEXTURES( mmesa->texture_heaps[ i ] );
 919    }
 920 }
 921
 922
 923 /**
 924  * This is the driver specific part of the createNewScreen entry point.
 925  *
 926  * \todo maybe fold this into intelInitDriver
 927  *
 928  * \return the __GLcontextModes supported by this driver
 929  */
 930 static const __DRIconfig **mgaInitScreen(__DRIscreen *psp)
 931 {
 932    static const __DRIversion ddx_expected = { 1, 2, 0 };
 933    static const __DRIversion dri_expected = { 4, 0, 0 };
 934    static const __DRIversion drm_expected = { 3, 0, 0 };
 935    MGADRIPtr dri_priv = (MGADRIPtr) psp->pDevPriv;
 936
 937    if ( ! driCheckDriDdxDrmVersions2( "MGA",
 938                                       &psp->dri_version, & dri_expected,
 939                                       &psp->ddx_version, & ddx_expected,
 940                                       &psp->drm_version, & drm_expected ) )
 941       return NULL;
 942
 943
 944    /* Calling driInitExtensions here, with a NULL context pointer,
 945     * does not actually enable the extensions.  It just makes sure
 946     * that all the dispatch offsets for all the extensions that
 947     * *might* be enables are known.  This is needed because the
 948     * dispatch offsets need to be known when _mesa_context_create is
 949     * called, but we can't enable the extensions until we have a
 950     * context pointer.
 951     *
 952     * Hello chicken.  Hello egg.  How are you two today?
 953     */
 954
 955    driInitExtensions( NULL, card_extensions, GL_FALSE );
 956    driInitExtensions( NULL, g400_extensions, GL_FALSE );
 957    driInitExtensions(NULL, ARB_vp_extensions, GL_FALSE);
 958    driInitExtensions( NULL, NV_vp_extensions, GL_FALSE );
 959
 960    if (!mgaInitDriver(psp))
 961        return NULL;
 962
 963    return mgaFillInModes( psp,
 964                           dri_priv->cpp * 8,
 965                           (dri_priv->cpp == 2) ? 16 : 24,
 966                           (dri_priv->cpp == 2) ? 0  : 8,
 967                           (dri_priv->backOffset != dri_priv->depthOffset) );
 968 }
 969
 970
 971 /**
 972  * Get information about previous buffer swaps.
 973  */
 974 static int
 975 getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo )
 976 {
 977    mgaContextPtr  mmesa;
 978
 979    if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
 980         || (dPriv->driContextPriv->driverPrivate == NULL)
 981         || (sInfo == NULL) ) {
 982       return -1;
 983    }
 984
 985    mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 986    sInfo->swap_count = mmesa->swap_count;
 987    sInfo->swap_ust = mmesa->swap_ust;
 988    sInfo->swap_missed_count = mmesa->swap_missed_count;
 989
 990    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
 991        ? driCalculateSwapUsage( dPriv, 0, mmesa->swap_missed_ust )
 992        : 0.0;
 993
 994    return 0;
 995 }
 996
 997 const struct __DriverAPIRec driDriverAPI = {
 998    .InitScreen      = mgaInitScreen,
 999    .DestroyScreen   = mgaDestroyScreen,
1000    .CreateContext   = mgaCreateContext,
1001    .DestroyContext  = mgaDestroyContext,
1002    .CreateBuffer    = mgaCreateBuffer,
1003    .DestroyBuffer   = mgaDestroyBuffer,
1004    .SwapBuffers     = mgaSwapBuffers,
1005    .MakeCurrent     = mgaMakeCurrent,
1006    .UnbindContext   = mgaUnbindContext,
1007    .GetSwapInfo     = getSwapInfo,
1008    .GetDrawableMSC  = driDrawableGetMSC32,
1009    .WaitForMSC      = driWaitForMSC32,
1010    .WaitForSBC      = NULL,
1011    .SwapBuffersMSC  = NULL
1012 };