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_secondary_color
  76 #if 0
  77 #define need_GL_EXT_paletted_texture
  78 #endif
  79 #define need_GL_APPLE_vertex_array_object
  80 #define need_GL_NV_vertex_program
  81 #include "extension_helper.h"
  82
  83 /* MGA configuration
  84  */
  85 #include "xmlpool.h"
  86
  87 PUBLIC const char __driConfigOptions[] =
  88 DRI_CONF_BEGIN
  89     DRI_CONF_SECTION_PERFORMANCE
  90         DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_0)
  91     DRI_CONF_SECTION_END
  92     DRI_CONF_SECTION_QUALITY
  93         DRI_CONF_TEXTURE_DEPTH(DRI_CONF_TEXTURE_DEPTH_FB)
  94         DRI_CONF_COLOR_REDUCTION(DRI_CONF_COLOR_REDUCTION_DITHER)
  95     DRI_CONF_SECTION_END
  96     DRI_CONF_SECTION_SOFTWARE
  97         DRI_CONF_ARB_VERTEX_PROGRAM(true)
  98         DRI_CONF_NV_VERTEX_PROGRAM(true)
  99     DRI_CONF_SECTION_END
 100     DRI_CONF_SECTION_DEBUG
 101         DRI_CONF_NO_RAST(false)
 102     DRI_CONF_SECTION_END
 103 DRI_CONF_END;
 104 static const GLuint __driNConfigOptions = 6;
 105
 106 #ifndef MGA_DEBUG
 107 int MGA_DEBUG = 0;
 108 #endif
 109
 110 static const __DRIconfig **
 111 mgaFillInModes( __DRIscreenPrivate *psp,
 112                 unsigned pixel_bits, unsigned depth_bits,
 113                 unsigned stencil_bits, GLboolean have_back_buffer )
 114 {
 115     __DRIconfig **configs;
 116     __GLcontextModes * m;
 117     unsigned depth_buffer_factor;
 118     unsigned back_buffer_factor;
 119     GLenum fb_format;
 120     GLenum fb_type;
 121     int i;
 122
 123     /* GLX_SWAP_COPY_OML is only supported because the MGA driver doesn't
 124      * support pageflipping at all.
 125      */
 126     static const GLenum back_buffer_modes[] = {
 127         GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 128     };
 129
 130     uint8_t depth_bits_array[3];
 131     uint8_t stencil_bits_array[3];
 132     uint8_t msaa_samples_array[1];
 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     msaa_samples_array[0] = 0;
 148
 149     depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
 150     back_buffer_factor  = (have_back_buffer) ? 2 : 1;
 151
 152     if ( pixel_bits == 16 ) {
 153         fb_format = GL_RGB;
 154         fb_type = GL_UNSIGNED_SHORT_5_6_5;
 155     }
 156     else {
 157         fb_format = GL_BGR;
 158         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 159     }
 160
 161     configs = driCreateConfigs(fb_format, fb_type,
 162                                depth_bits_array, stencil_bits_array,
 163                                depth_buffer_factor,
 164                                back_buffer_modes, back_buffer_factor,
 165                                msaa_samples_array, 1);
 166     if (configs == NULL) {
 167         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 168                  __func__, __LINE__ );
 169         return NULL;
 170     }
 171
 172    /* Mark the visual as slow if there are "fake" stencil bits.
 173     */
 174    for (i = 0; configs[i]; i++) {
 175       m = &configs[i]->modes;
 176       if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
 177          m->visualRating = GLX_SLOW_CONFIG;
 178       }
 179    }
 180
 181    return (const __DRIconfig **) configs;
 182 }
 183
 184 const __DRIextension *mgaScreenExtensions[] = {
 185     &driReadDrawableExtension,
 186     &driSwapControlExtension.base,
 187     &driFrameTrackingExtension.base,
 188     &driMediaStreamCounterExtension.base,
 189     NULL
 190 };
 191
 192 static GLboolean
 193 mgaInitDriver(__DRIscreenPrivate *sPriv)
 194 {
 195    mgaScreenPrivate *mgaScreen;
 196    MGADRIPtr         serverInfo = (MGADRIPtr)sPriv->pDevPriv;
 197
 198    if (sPriv->devPrivSize != sizeof(MGADRIRec)) {
 199       fprintf(stderr,"\nERROR!  sizeof(MGADRIRec) does not match passed size from device driver\n");
 200       return GL_FALSE;
 201    }
 202
 203    /* Allocate the private area */
 204    mgaScreen = (mgaScreenPrivate *)MALLOC(sizeof(mgaScreenPrivate));
 205    if (!mgaScreen) {
 206       __driUtilMessage("Couldn't malloc screen struct");
 207       return GL_FALSE;
 208    }
 209
 210    mgaScreen->sPriv = sPriv;
 211    sPriv->private = (void *)mgaScreen;
 212
 213    if (sPriv->drm_version.minor >= 1) {
 214       int ret;
 215       drm_mga_getparam_t gp;
 216
 217       gp.param = MGA_PARAM_IRQ_NR;
 218       gp.value = &mgaScreen->irq;
 219       mgaScreen->irq = 0;
 220
 221       ret = drmCommandWriteRead( sPriv->fd, DRM_MGA_GETPARAM,
 222                                     &gp, sizeof(gp));
 223       if (ret) {
 224             fprintf(stderr, "drmMgaGetParam (MGA_PARAM_IRQ_NR): %d\n", ret);
 225             FREE(mgaScreen);
 226             sPriv->private = NULL;
 227             return GL_FALSE;
 228       }
 229    }
 230
 231    sPriv->extensions = mgaScreenExtensions;
 232
 233    if (serverInfo->chipset != MGA_CARD_TYPE_G200 &&
 234        serverInfo->chipset != MGA_CARD_TYPE_G400) {
 235       FREE(mgaScreen);
 236       sPriv->private = NULL;
 237       __driUtilMessage("Unrecognized chipset");
 238       return GL_FALSE;
 239    }
 240
 241
 242    mgaScreen->chipset = serverInfo->chipset;
 243    mgaScreen->cpp = serverInfo->cpp;
 244
 245    mgaScreen->agpMode = serverInfo->agpMode;
 246
 247    mgaScreen->frontPitch = serverInfo->frontPitch;
 248    mgaScreen->frontOffset = serverInfo->frontOffset;
 249    mgaScreen->backOffset = serverInfo->backOffset;
 250    mgaScreen->backPitch  =  serverInfo->backPitch;
 251    mgaScreen->depthOffset = serverInfo->depthOffset;
 252    mgaScreen->depthPitch  =  serverInfo->depthPitch;
 253
 254
 255    /* The only reason that the MMIO region needs to be accessable and the
 256     * primary DMA region base address needs to be known is so that the driver
 257     * can busy wait for certain DMA operations to complete (see
 258     * mgaWaitForFrameCompletion in mgaioctl.c).
 259     *
 260     * Starting with MGA DRM version 3.2, these are completely unneeded as
 261     * there is a new, in-kernel mechanism for handling the wait.
 262     */
 263
 264    if (mgaScreen->sPriv->drm_version.minor < 2) {
 265       mgaScreen->mmio.handle = serverInfo->registers.handle;
 266       mgaScreen->mmio.size = serverInfo->registers.size;
 267       if ( drmMap( sPriv->fd,
 268                    mgaScreen->mmio.handle, mgaScreen->mmio.size,
 269                    &mgaScreen->mmio.map ) < 0 ) {
 270          FREE( mgaScreen );
 271          sPriv->private = NULL;
 272          __driUtilMessage( "Couldn't map MMIO registers" );
 273          return GL_FALSE;
 274       }
 275
 276       mgaScreen->primary.handle = serverInfo->primary.handle;
 277       mgaScreen->primary.size = serverInfo->primary.size;
 278    }
 279    else {
 280       (void) memset( & mgaScreen->primary, 0, sizeof( mgaScreen->primary ) );
 281       (void) memset( & mgaScreen->mmio, 0, sizeof( mgaScreen->mmio ) );
 282    }
 283
 284    mgaScreen->textureOffset[MGA_CARD_HEAP] = serverInfo->textureOffset;
 285    mgaScreen->textureOffset[MGA_AGP_HEAP] = (serverInfo->agpTextureOffset |
 286                                              PDEA_pagpxfer_enable | 1);
 287
 288    mgaScreen->textureSize[MGA_CARD_HEAP] = serverInfo->textureSize;
 289    mgaScreen->textureSize[MGA_AGP_HEAP] = serverInfo->agpTextureSize;
 290
 291
 292    /* The texVirtual array stores the base addresses in the CPU's address
 293     * space of the texture memory pools.  The base address of the on-card
 294     * memory pool is calculated as an offset of the base of video memory.  The
 295     * AGP texture pool has to be mapped into the processes address space by
 296     * the DRM.
 297     */
 298
 299    mgaScreen->texVirtual[MGA_CARD_HEAP] = (char *)(mgaScreen->sPriv->pFB +
 300                                            serverInfo->textureOffset);
 301
 302    if ( serverInfo->agpTextureSize > 0 ) {
 303       if (drmMap(sPriv->fd, serverInfo->agpTextureOffset,
 304                  serverInfo->agpTextureSize,
 305                  (drmAddress *)&mgaScreen->texVirtual[MGA_AGP_HEAP]) != 0) {
 306          FREE(mgaScreen);
 307          sPriv->private = NULL;
 308          __driUtilMessage("Couldn't map agptexture region");
 309          return GL_FALSE;
 310       }
 311    }
 312
 313
 314    /* For calculating setupdma addresses.
 315     */
 316
 317    mgaScreen->bufs = drmMapBufs(sPriv->fd);
 318    if (!mgaScreen->bufs) {
 319       FREE(mgaScreen);
 320       sPriv->private = NULL;
 321       __driUtilMessage("Couldn't map dma buffers");
 322       return GL_FALSE;
 323    }
 324    mgaScreen->sarea_priv_offset = serverInfo->sarea_priv_offset;
 325
 326    /* parse information in __driConfigOptions */
 327    driParseOptionInfo (&mgaScreen->optionCache,
 328                        __driConfigOptions, __driNConfigOptions);
 329
 330    return GL_TRUE;
 331 }
 332
 333
 334 static void
 335 mgaDestroyScreen(__DRIscreenPrivate *sPriv)
 336 {
 337    mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *) sPriv->private;
 338
 339    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 340       fprintf(stderr, "mgaDestroyScreen\n");
 341
 342    drmUnmapBufs(mgaScreen->bufs);
 343
 344
 345    /* free all option information */
 346    driDestroyOptionInfo (&mgaScreen->optionCache);
 347
 348    FREE(mgaScreen);
 349    sPriv->private = NULL;
 350 }
 351
 352
 353 extern const struct tnl_pipeline_stage _mga_render_stage;
 354
 355 static const struct tnl_pipeline_stage *mga_pipeline[] = {
 356    &_tnl_vertex_transform_stage,
 357    &_tnl_normal_transform_stage,
 358    &_tnl_lighting_stage,
 359    &_tnl_fog_coordinate_stage,
 360    &_tnl_texgen_stage,
 361    &_tnl_texture_transform_stage,
 362    &_tnl_vertex_program_stage,
 363
 364                                 /* REMOVE: point attenuation stage */
 365 #if 0
 366    &_mga_render_stage,          /* ADD: unclipped rastersetup-to-dma */
 367                                 /* Need new ioctl for wacceptseq */
 368 #endif
 369    &_tnl_render_stage,
 370    0,
 371 };
 372
 373
 374 static const struct dri_extension g400_extensions[] =
 375 {
 376    { "GL_ARB_multitexture",           NULL },
 377    { "GL_ARB_texture_env_add",        NULL },
 378    { "GL_ARB_texture_env_combine",    NULL },
 379    { "GL_ARB_texture_env_crossbar",   NULL },
 380    { "GL_EXT_texture_env_combine",    NULL },
 381    { "GL_EXT_texture_edge_clamp",     NULL },
 382    { "GL_ATI_texture_env_combine3",   NULL },
 383    { NULL,                            NULL }
 384 };
 385
 386 static const struct dri_extension card_extensions[] =
 387 {
 388    { "GL_ARB_texture_rectangle",      NULL },
 389    { "GL_EXT_blend_logic_op",         NULL },
 390    { "GL_EXT_fog_coord",              GL_EXT_fog_coord_functions },
 391    /* paletted_textures currently doesn't work, but we could fix them later */
 392 #if defined( need_GL_EXT_paletted_texture )
 393    { "GL_EXT_shared_texture_palette", NULL },
 394    { "GL_EXT_paletted_texture",       GL_EXT_paletted_texture_functions },
 395 #endif
 396    { "GL_EXT_secondary_color",        GL_EXT_secondary_color_functions },
 397    { "GL_EXT_stencil_wrap",           NULL },
 398    { "GL_APPLE_vertex_array_object",  GL_APPLE_vertex_array_object_functions },
 399    { "GL_MESA_ycbcr_texture",         NULL },
 400    { "GL_SGIS_generate_mipmap",       NULL },
 401    { NULL,                            NULL }
 402 };
 403
 404 static const struct dri_extension ARB_vp_extensions[] = {
 405    { "GL_ARB_vertex_program",         GL_ARB_vertex_program_functions },
 406    { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
 407    { NULL,                            NULL }
 408 };
 409
 410 static const struct dri_extension NV_vp_extensions[] = {
 411    { "GL_NV_vertex_program",          GL_NV_vertex_program_functions },
 412    { "GL_NV_vertex_program1_1",       NULL },
 413    { NULL,                            NULL }
 414 };
 415
 416 static const struct dri_debug_control debug_control[] =
 417 {
 418     { "fall",  DEBUG_VERBOSE_FALLBACK },
 419     { "tex",   DEBUG_VERBOSE_TEXTURE },
 420     { "ioctl", DEBUG_VERBOSE_IOCTL },
 421     { "verb",  DEBUG_VERBOSE_MSG },
 422     { "dri",   DEBUG_VERBOSE_DRI },
 423     { NULL,    0 }
 424 };
 425
 426
 427 static GLboolean
 428 mgaCreateContext( const __GLcontextModes *mesaVis,
 429                   __DRIcontextPrivate *driContextPriv,
 430                   void *sharedContextPrivate )
 431 {
 432    int i;
 433    unsigned   maxlevels;
 434    GLcontext *ctx, *shareCtx;
 435    mgaContextPtr mmesa;
 436    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 437    mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *)sPriv->private;
 438    drm_mga_sarea_t *saPriv = (drm_mga_sarea_t *)(((char*)sPriv->pSAREA)+
 439                                               mgaScreen->sarea_priv_offset);
 440    struct dd_function_table functions;
 441
 442    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 443       fprintf(stderr, "mgaCreateContext\n");
 444
 445    /* allocate mga context */
 446    mmesa = (mgaContextPtr) CALLOC(sizeof(mgaContext));
 447    if (!mmesa) {
 448       return GL_FALSE;
 449    }
 450
 451    /* Init default driver functions then plug in our Radeon-specific functions
 452     * (the texture functions are especially important)
 453     */
 454    _mesa_init_driver_functions( &functions );
 455    mgaInitDriverFuncs( &functions );
 456    mgaInitTextureFuncs( &functions );
 457    mgaInitIoctlFuncs( &functions );
 458
 459    /* Allocate the Mesa context */
 460    if (sharedContextPrivate)
 461       shareCtx = ((mgaContextPtr) sharedContextPrivate)->glCtx;
 462    else
 463       shareCtx = NULL;
 464    mmesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 465                                        &functions, (void *) mmesa);
 466    if (!mmesa->glCtx) {
 467       FREE(mmesa);
 468       return GL_FALSE;
 469    }
 470    driContextPriv->driverPrivate = mmesa;
 471
 472    /* Init mga state */
 473    mmesa->hHWContext = driContextPriv->hHWContext;
 474    mmesa->driFd = sPriv->fd;
 475    mmesa->driHwLock = &sPriv->pSAREA->lock;
 476
 477    mmesa->mgaScreen = mgaScreen;
 478    mmesa->driScreen = sPriv;
 479    mmesa->sarea = (void *)saPriv;
 480
 481    /* Parse configuration files */
 482    driParseConfigFiles (&mmesa->optionCache, &mgaScreen->optionCache,
 483                         sPriv->myNum, "mga");
 484
 485    (void) memset( mmesa->texture_heaps, 0, sizeof( mmesa->texture_heaps ) );
 486    make_empty_list( & mmesa->swapped );
 487
 488    mmesa->nr_heaps = mgaScreen->texVirtual[MGA_AGP_HEAP] ? 2 : 1;
 489    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 490       mmesa->texture_heaps[i] = driCreateTextureHeap( i, mmesa,
 491             mgaScreen->textureSize[i],
 492             6,
 493             MGA_NR_TEX_REGIONS,
 494             (drmTextureRegionPtr)mmesa->sarea->texList[i],
 495             &mmesa->sarea->texAge[i],
 496             &mmesa->swapped,
 497             sizeof( mgaTextureObject_t ),
 498             (destroy_texture_object_t *) mgaDestroyTexObj );
 499    }
 500
 501    /* Set the maximum texture size small enough that we can guarentee
 502     * that both texture units can bind a maximal texture and have them
 503     * on the card at once.
 504     */
 505    ctx = mmesa->glCtx;
 506    if ( mgaScreen->chipset == MGA_CARD_TYPE_G200 ) {
 507       ctx->Const.MaxTextureUnits = 1;
 508       ctx->Const.MaxTextureImageUnits = 1;
 509       ctx->Const.MaxTextureCoordUnits = 1;
 510       maxlevels = G200_TEX_MAXLEVELS;
 511
 512    }
 513    else {
 514       ctx->Const.MaxTextureUnits = 2;
 515       ctx->Const.MaxTextureImageUnits = 2;
 516       ctx->Const.MaxTextureCoordUnits = 2;
 517       maxlevels = G400_TEX_MAXLEVELS;
 518    }
 519
 520    driCalculateMaxTextureLevels( mmesa->texture_heaps,
 521                                  mmesa->nr_heaps,
 522                                  & ctx->Const,
 523                                  4,
 524                                  11, /* max 2D texture size is 2048x2048 */
 525                                  0,  /* 3D textures unsupported. */
 526                                  0,  /* cube textures unsupported. */
 527                                  11, /* max texture rect size is 2048x2048 */
 528                                  maxlevels,
 529                                  GL_FALSE,
 530                                  0 );
 531
 532    ctx->Const.MinLineWidth = 1.0;
 533    ctx->Const.MinLineWidthAA = 1.0;
 534    ctx->Const.MaxLineWidth = 10.0;
 535    ctx->Const.MaxLineWidthAA = 10.0;
 536    ctx->Const.LineWidthGranularity = 1.0;
 537
 538    ctx->Const.MaxDrawBuffers = 1;
 539
 540    mmesa->texture_depth = driQueryOptioni (&mmesa->optionCache,
 541                                            "texture_depth");
 542    if (mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FB)
 543       mmesa->texture_depth = ( mesaVis->rgbBits >= 24 ) ?
 544          DRI_CONF_TEXTURE_DEPTH_32 : DRI_CONF_TEXTURE_DEPTH_16;
 545    mmesa->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 546
 547    switch (mesaVis->depthBits) {
 548    case 16:
 549       mmesa->depth_scale = 1.0/(GLdouble)0xffff;
 550       mmesa->depth_clear_mask = ~0;
 551       mmesa->ClearDepth = 0xffff;
 552       break;
 553    case 24:
 554       mmesa->depth_scale = 1.0/(GLdouble)0xffffff;
 555       if (mmesa->hw_stencil) {
 556          mmesa->depth_clear_mask = 0xffffff00;
 557          mmesa->stencil_clear_mask = 0x000000ff;
 558       } else
 559          mmesa->depth_clear_mask = ~0;
 560       mmesa->ClearDepth = 0xffffff00;
 561       break;
 562    case 32:
 563       mmesa->depth_scale = 1.0/(GLdouble)0xffffffff;
 564       mmesa->depth_clear_mask = ~0;
 565       mmesa->ClearDepth = 0xffffffff;
 566       break;
 567    };
 568
 569    mmesa->haveHwStipple = GL_FALSE;
 570    mmesa->RenderIndex = -1;             /* impossible value */
 571    mmesa->dirty = ~0;
 572    mmesa->vertex_format = 0;
 573    mmesa->CurrentTexObj[0] = 0;
 574    mmesa->CurrentTexObj[1] = 0;
 575    mmesa->tmu_source[0] = 0;
 576    mmesa->tmu_source[1] = 1;
 577
 578    mmesa->texAge[0] = 0;
 579    mmesa->texAge[1] = 0;
 580
 581    /* Initialize the software rasterizer and helper modules.
 582     */
 583    _swrast_CreateContext( ctx );
 584    _vbo_CreateContext( ctx );
 585    _tnl_CreateContext( ctx );
 586
 587    _swsetup_CreateContext( ctx );
 588
 589    /* Install the customized pipeline:
 590     */
 591    _tnl_destroy_pipeline( ctx );
 592    _tnl_install_pipeline( ctx, mga_pipeline );
 593
 594    /* Configure swrast and T&L to match hardware characteristics:
 595     */
 596    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 597    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 598    _tnl_allow_pixel_fog( ctx, GL_FALSE );
 599    _tnl_allow_vertex_fog( ctx, GL_TRUE );
 600
 601    mmesa->primary_offset = mmesa->mgaScreen->primary.handle;
 602
 603    ctx->DriverCtx = (void *) mmesa;
 604    mmesa->glCtx = ctx;
 605
 606    driInitExtensions( ctx, card_extensions, GL_FALSE );
 607
 608    if (MGA_IS_G400(MGA_CONTEXT(ctx))) {
 609       driInitExtensions( ctx, g400_extensions, GL_FALSE );
 610    }
 611
 612    if ( driQueryOptionb( &mmesa->optionCache, "arb_vertex_program" ) ) {
 613       driInitExtensions(ctx, ARB_vp_extensions, GL_FALSE);
 614    }
 615
 616    if ( driQueryOptionb( &mmesa->optionCache, "nv_vertex_program" ) ) {
 617       driInitExtensions( ctx, NV_vp_extensions, GL_FALSE );
 618    }
 619
 620
 621    /* XXX these should really go right after _mesa_init_driver_functions() */
 622    mgaDDInitStateFuncs( ctx );
 623    mgaDDInitSpanFuncs( ctx );
 624    mgaDDInitPixelFuncs( ctx );
 625    mgaDDInitTriFuncs( ctx );
 626
 627    mgaInitVB( ctx );
 628    mgaInitState( mmesa );
 629
 630    driContextPriv->driverPrivate = (void *) mmesa;
 631
 632 #if DO_DEBUG
 633    MGA_DEBUG = driParseDebugString( getenv( "MGA_DEBUG" ),
 634                                     debug_control );
 635 #endif
 636
 637    (*sPriv->systemTime->getUST)( & mmesa->swap_ust );
 638
 639    if (driQueryOptionb(&mmesa->optionCache, "no_rast")) {
 640       fprintf(stderr, "disabling 3D acceleration\n");
 641       FALLBACK(mmesa->glCtx, MGA_FALLBACK_DISABLE, 1);
 642    }
 643
 644    return GL_TRUE;
 645 }
 646
 647 static void
 648 mgaDestroyContext(__DRIcontextPrivate *driContextPriv)
 649 {
 650    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 651
 652    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 653       fprintf( stderr, "[%s:%d] mgaDestroyContext start\n",
 654                __FILE__, __LINE__ );
 655
 656    assert(mmesa); /* should never be null */
 657    if (mmesa) {
 658       GLboolean   release_texture_heaps;
 659
 660
 661       release_texture_heaps = (mmesa->glCtx->Shared->RefCount == 1);
 662       _swsetup_DestroyContext( mmesa->glCtx );
 663       _tnl_DestroyContext( mmesa->glCtx );
 664       _vbo_DestroyContext( mmesa->glCtx );
 665       _swrast_DestroyContext( mmesa->glCtx );
 666
 667       mgaFreeVB( mmesa->glCtx );
 668
 669       /* free the Mesa context */
 670       mmesa->glCtx->DriverCtx = NULL;
 671       _mesa_destroy_context(mmesa->glCtx);
 672
 673       if ( release_texture_heaps ) {
 674          /* This share group is about to go away, free our private
 675           * texture object data.
 676           */
 677          int i;
 678
 679          for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 680             driDestroyTextureHeap( mmesa->texture_heaps[ i ] );
 681             mmesa->texture_heaps[ i ] = NULL;
 682          }
 683
 684          assert( is_empty_list( & mmesa->swapped ) );
 685       }
 686
 687       /* free the option cache */
 688       driDestroyOptionCache (&mmesa->optionCache);
 689
 690       FREE(mmesa);
 691    }
 692
 693    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 694       fprintf( stderr, "[%s:%d] mgaDestroyContext done\n",
 695                __FILE__, __LINE__ );
 696 }
 697
 698
 699 static GLboolean
 700 mgaCreateBuffer( __DRIscreenPrivate *driScrnPriv,
 701                  __DRIdrawablePrivate *driDrawPriv,
 702                  const __GLcontextModes *mesaVis,
 703                  GLboolean isPixmap )
 704 {
 705    mgaScreenPrivate *screen = (mgaScreenPrivate *) driScrnPriv->private;
 706
 707    if (isPixmap) {
 708       return GL_FALSE; /* not implemented */
 709    }
 710    else {
 711       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 712                              mesaVis->depthBits != 24);
 713
 714 #if 0
 715       driDrawPriv->driverPrivate = (void *)
 716          _mesa_create_framebuffer(mesaVis,
 717                                   GL_FALSE,  /* software depth buffer? */
 718                                   swStencil,
 719                                   mesaVis->accumRedBits > 0,
 720                                   mesaVis->alphaBits > 0 );
 721 #else
 722       struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
 723
 724       {
 725          driRenderbuffer *frontRb
 726             = driNewRenderbuffer(GL_RGBA,
 727                                  NULL,
 728                                  screen->cpp,
 729                                  screen->frontOffset, screen->frontPitch,
 730                                  driDrawPriv);
 731          mgaSetSpanFunctions(frontRb, mesaVis);
 732          _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
 733       }
 734
 735       if (mesaVis->doubleBufferMode) {
 736          driRenderbuffer *backRb
 737             = driNewRenderbuffer(GL_RGBA,
 738                                  NULL,
 739                                  screen->cpp,
 740                                  screen->backOffset, screen->backPitch,
 741                                  driDrawPriv);
 742          mgaSetSpanFunctions(backRb, mesaVis);
 743          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
 744       }
 745
 746       if (mesaVis->depthBits == 16) {
 747          driRenderbuffer *depthRb
 748             = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
 749                                  NULL,
 750                                  screen->cpp,
 751                                  screen->depthOffset, screen->depthPitch,
 752                                  driDrawPriv);
 753          mgaSetSpanFunctions(depthRb, mesaVis);
 754          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 755       }
 756       else if (mesaVis->depthBits == 24) {
 757          /* XXX is this right? */
 758          if (mesaVis->stencilBits) {
 759             driRenderbuffer *depthRb
 760                = driNewRenderbuffer(GL_DEPTH_COMPONENT24,
 761                                     NULL,
 762                                     screen->cpp,
 763                                     screen->depthOffset, screen->depthPitch,
 764                                     driDrawPriv);
 765             mgaSetSpanFunctions(depthRb, mesaVis);
 766             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 767          }
 768          else {
 769             driRenderbuffer *depthRb
 770                = driNewRenderbuffer(GL_DEPTH_COMPONENT32,
 771                                     NULL,
 772                                     screen->cpp,
 773                                     screen->depthOffset, screen->depthPitch,
 774                                     driDrawPriv);
 775             mgaSetSpanFunctions(depthRb, mesaVis);
 776             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 777          }
 778       }
 779       else if (mesaVis->depthBits == 32) {
 780          driRenderbuffer *depthRb
 781             = driNewRenderbuffer(GL_DEPTH_COMPONENT32,
 782                                  NULL,
 783                                  screen->cpp,
 784                                  screen->depthOffset, screen->depthPitch,
 785                                  driDrawPriv);
 786          mgaSetSpanFunctions(depthRb, mesaVis);
 787          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 788       }
 789
 790       if (mesaVis->stencilBits > 0 && !swStencil) {
 791          driRenderbuffer *stencilRb
 792             = driNewRenderbuffer(GL_STENCIL_INDEX8_EXT,
 793                                  NULL,
 794                                  screen->cpp,
 795                                  screen->depthOffset, screen->depthPitch,
 796                                  driDrawPriv);
 797          mgaSetSpanFunctions(stencilRb, mesaVis);
 798          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
 799       }
 800
 801       _mesa_add_soft_renderbuffers(fb,
 802                                    GL_FALSE, /* color */
 803                                    GL_FALSE, /* depth */
 804                                    swStencil,
 805                                    mesaVis->accumRedBits > 0,
 806                                    GL_FALSE, /* alpha */
 807                                    GL_FALSE /* aux */);
 808       driDrawPriv->driverPrivate = (void *) fb;
 809 #endif
 810
 811       return (driDrawPriv->driverPrivate != NULL);
 812    }
 813 }
 814
 815
 816 static void
 817 mgaDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
 818 {
 819    _mesa_unreference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)));
 820 }
 821
 822 static void
 823 mgaSwapBuffers(__DRIdrawablePrivate *dPriv)
 824 {
 825    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 826       mgaContextPtr mmesa;
 827       GLcontext *ctx;
 828       mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 829       ctx = mmesa->glCtx;
 830
 831       if (ctx->Visual.doubleBufferMode) {
 832          _mesa_notifySwapBuffers( ctx );
 833          mgaCopyBuffer( dPriv );
 834       }
 835    } else {
 836       /* XXX this shouldn't be an error but we can't handle it for now */
 837       _mesa_problem(NULL, "%s: drawable has no context!\n", __FUNCTION__);
 838    }
 839 }
 840
 841 static GLboolean
 842 mgaUnbindContext(__DRIcontextPrivate *driContextPriv)
 843 {
 844    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 845    if (mmesa)
 846       mmesa->dirty = ~0;
 847
 848    return GL_TRUE;
 849 }
 850
 851 /* This looks buggy to me - the 'b' variable isn't used anywhere...
 852  * Hmm - It seems that the drawable is already hooked in to
 853  * driDrawablePriv.
 854  *
 855  * But why are we doing context initialization here???
 856  */
 857 static GLboolean
 858 mgaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 859                __DRIdrawablePrivate *driDrawPriv,
 860                __DRIdrawablePrivate *driReadPriv)
 861 {
 862    if (driContextPriv) {
 863       mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 864
 865       if (mmesa->driDrawable != driDrawPriv) {
 866          if (driDrawPriv->swap_interval == (unsigned)-1) {
 867             driDrawPriv->vblFlags = (mmesa->mgaScreen->irq == 0)
 868                ? VBLANK_FLAG_NO_IRQ
 869                : driGetDefaultVBlankFlags(&mmesa->optionCache);
 870
 871             driDrawableInitVBlank( driDrawPriv );
 872          }
 873
 874          mmesa->driDrawable = driDrawPriv;
 875          mmesa->dirty = ~0;
 876          mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 877       }
 878
 879       mmesa->driReadable = driReadPriv;
 880
 881       _mesa_make_current(mmesa->glCtx,
 882                          (GLframebuffer *) driDrawPriv->driverPrivate,
 883                          (GLframebuffer *) driReadPriv->driverPrivate);
 884    }
 885    else {
 886       _mesa_make_current(NULL, NULL, NULL);
 887    }
 888
 889    return GL_TRUE;
 890 }
 891
 892
 893 void mgaGetLock( mgaContextPtr mmesa, GLuint flags )
 894 {
 895    __DRIdrawablePrivate *dPriv = mmesa->driDrawable;
 896    drm_mga_sarea_t *sarea = mmesa->sarea;
 897    int me = mmesa->hHWContext;
 898    int i;
 899
 900    drmGetLock(mmesa->driFd, mmesa->hHWContext, flags);
 901
 902    DRI_VALIDATE_DRAWABLE_INFO( mmesa->driScreen, dPriv );
 903    if (*(dPriv->pStamp) != mmesa->lastStamp) {
 904       mmesa->lastStamp = *(dPriv->pStamp);
 905       mmesa->SetupNewInputs |= VERT_BIT_POS;
 906       mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 907       mgaUpdateRects( mmesa, (MGA_FRONT|MGA_BACK) );
 908       driUpdateFramebufferSize(mmesa->glCtx, dPriv);
 909    }
 910
 911    mmesa->dirty |= MGA_UPLOAD_CONTEXT | MGA_UPLOAD_CLIPRECTS;
 912
 913    mmesa->sarea->dirty |= MGA_UPLOAD_CONTEXT;
 914
 915    if (sarea->ctxOwner != me) {
 916       mmesa->dirty |= (MGA_UPLOAD_CONTEXT | MGA_UPLOAD_TEX0 |
 917                        MGA_UPLOAD_TEX1 | MGA_UPLOAD_PIPE);
 918       sarea->ctxOwner=me;
 919    }
 920
 921    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 922       DRI_AGE_TEXTURES( mmesa->texture_heaps[ i ] );
 923    }
 924 }
 925
 926
 927 /**
 928  * This is the driver specific part of the createNewScreen entry point.
 929  *
 930  * \todo maybe fold this into intelInitDriver
 931  *
 932  * \return the __GLcontextModes supported by this driver
 933  */
 934 static const __DRIconfig **mgaInitScreen(__DRIscreen *psp)
 935 {
 936    static const __DRIversion ddx_expected = { 1, 2, 0 };
 937    static const __DRIversion dri_expected = { 4, 0, 0 };
 938    static const __DRIversion drm_expected = { 3, 0, 0 };
 939    MGADRIPtr dri_priv = (MGADRIPtr) psp->pDevPriv;
 940
 941    if ( ! driCheckDriDdxDrmVersions2( "MGA",
 942                                       &psp->dri_version, & dri_expected,
 943                                       &psp->ddx_version, & ddx_expected,
 944                                       &psp->drm_version, & drm_expected ) )
 945       return NULL;
 946
 947
 948    /* Calling driInitExtensions here, with a NULL context pointer,
 949     * does not actually enable the extensions.  It just makes sure
 950     * that all the dispatch offsets for all the extensions that
 951     * *might* be enables are known.  This is needed because the
 952     * dispatch offsets need to be known when _mesa_context_create is
 953     * called, but we can't enable the extensions until we have a
 954     * context pointer.
 955     *
 956     * Hello chicken.  Hello egg.  How are you two today?
 957     */
 958
 959    driInitExtensions( NULL, card_extensions, GL_FALSE );
 960    driInitExtensions( NULL, g400_extensions, GL_FALSE );
 961    driInitExtensions(NULL, ARB_vp_extensions, GL_FALSE);
 962    driInitExtensions( NULL, NV_vp_extensions, GL_FALSE );
 963
 964    if (!mgaInitDriver(psp))
 965        return NULL;
 966
 967    return mgaFillInModes( psp,
 968                           dri_priv->cpp * 8,
 969                           (dri_priv->cpp == 2) ? 16 : 24,
 970                           (dri_priv->cpp == 2) ? 0  : 8,
 971                           (dri_priv->backOffset != dri_priv->depthOffset) );
 972 }
 973
 974
 975 /**
 976  * Get information about previous buffer swaps.
 977  */
 978 static int
 979 getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo )
 980 {
 981    mgaContextPtr  mmesa;
 982
 983    if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
 984         || (dPriv->driContextPriv->driverPrivate == NULL)
 985         || (sInfo == NULL) ) {
 986       return -1;
 987    }
 988
 989    mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 990    sInfo->swap_count = mmesa->swap_count;
 991    sInfo->swap_ust = mmesa->swap_ust;
 992    sInfo->swap_missed_count = mmesa->swap_missed_count;
 993
 994    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
 995        ? driCalculateSwapUsage( dPriv, 0, mmesa->swap_missed_ust )
 996        : 0.0;
 997
 998    return 0;
 999 }
1000
1001 const struct __DriverAPIRec driDriverAPI = {
1002    .InitScreen      = mgaInitScreen,
1003    .DestroyScreen   = mgaDestroyScreen,
1004    .CreateContext   = mgaCreateContext,
1005    .DestroyContext  = mgaDestroyContext,
1006    .CreateBuffer    = mgaCreateBuffer,
1007    .DestroyBuffer   = mgaDestroyBuffer,
1008    .SwapBuffers     = mgaSwapBuffers,
1009    .MakeCurrent     = mgaMakeCurrent,
1010    .UnbindContext   = mgaUnbindContext,
1011    .GetSwapInfo     = getSwapInfo,
1012    .GetDrawableMSC  = driDrawableGetMSC32,
1013    .WaitForMSC      = driWaitForMSC32,
1014    .WaitForSBC      = NULL,
1015    .SwapBuffersMSC  = NULL
1016 };