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/simple_list.h"
  39 #include "main/imports.h"
  40 #include "main/framebuffer.h"
  41 #include "main/renderbuffer.h"
  42
  43 #include "swrast/swrast.h"
  44 #include "swrast_setup/swrast_setup.h"
  45 #include "tnl/tnl.h"
  46 #include "vbo/vbo.h"
  47
  48 #include "tnl/t_pipeline.h"
  49
  50 #include "drivers/common/driverfuncs.h"
  51
  52 #include "mgadd.h"
  53 #include "mgastate.h"
  54 #include "mgatex.h"
  55 #include "mgaspan.h"
  56 #include "mgaioctl.h"
  57 #include "mgatris.h"
  58 #include "mgavb.h"
  59 #include "mgapixel.h"
  60 #include "mga_xmesa.h"
  61 #include "mga_dri.h"
  62
  63 #include "utils.h"
  64 #include "vblank.h"
  65
  66 #include "drirenderbuffer.h"
  67
  68 #include "GL/internal/dri_interface.h"
  69
  70 #define need_GL_ARB_vertex_program
  71 #define need_GL_EXT_fog_coord
  72 #define need_GL_EXT_gpu_program_parameters
  73 #define need_GL_EXT_secondary_color
  74 #if 0
  75 #define need_GL_EXT_paletted_texture
  76 #endif
  77 #define need_GL_APPLE_vertex_array_object
  78 #define need_GL_NV_vertex_program
  79 #include "main/remap_helper.h"
  80
  81 /* MGA configuration
  82  */
  83 #include "xmlpool.h"
  84
  85 PUBLIC const char __driConfigOptions[] =
  86 DRI_CONF_BEGIN
  87     DRI_CONF_SECTION_PERFORMANCE
  88         DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_0)
  89     DRI_CONF_SECTION_END
  90     DRI_CONF_SECTION_QUALITY
  91         DRI_CONF_TEXTURE_DEPTH(DRI_CONF_TEXTURE_DEPTH_FB)
  92         DRI_CONF_COLOR_REDUCTION(DRI_CONF_COLOR_REDUCTION_DITHER)
  93     DRI_CONF_SECTION_END
  94     DRI_CONF_SECTION_SOFTWARE
  95         DRI_CONF_ARB_VERTEX_PROGRAM(true)
  96         DRI_CONF_NV_VERTEX_PROGRAM(true)
  97     DRI_CONF_SECTION_END
  98     DRI_CONF_SECTION_DEBUG
  99         DRI_CONF_NO_RAST(false)
 100     DRI_CONF_SECTION_END
 101 DRI_CONF_END;
 102 static const GLuint __driNConfigOptions = 6;
 103
 104 #ifndef MGA_DEBUG
 105 int MGA_DEBUG = 0;
 106 #endif
 107
 108 static const __DRIconfig **
 109 mgaFillInModes( __DRIscreen *psp,
 110                 unsigned pixel_bits, unsigned depth_bits,
 111                 unsigned stencil_bits, GLboolean have_back_buffer )
 112 {
 113     __DRIconfig **configs;
 114     __GLcontextModes * m;
 115     unsigned depth_buffer_factor;
 116     unsigned back_buffer_factor;
 117     GLenum fb_format;
 118     GLenum fb_type;
 119     int i;
 120
 121     /* GLX_SWAP_COPY_OML is only supported because the MGA driver doesn't
 122      * support pageflipping at all.
 123      */
 124     static const GLenum back_buffer_modes[] = {
 125         GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 126     };
 127
 128     uint8_t depth_bits_array[3];
 129     uint8_t stencil_bits_array[3];
 130     uint8_t msaa_samples_array[1];
 131
 132
 133     depth_bits_array[0] = 0;
 134     depth_bits_array[1] = depth_bits;
 135     depth_bits_array[2] = depth_bits;
 136
 137     /* Just like with the accumulation buffer, always provide some modes
 138      * with a stencil buffer.  It will be a sw fallback, but some apps won't
 139      * care about that.
 140      */
 141     stencil_bits_array[0] = 0;
 142     stencil_bits_array[1] = 0;
 143     stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
 144
 145     msaa_samples_array[0] = 0;
 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                                msaa_samples_array, 1, GL_TRUE);
 164     if (configs == NULL) {
 165         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 166                  __func__, __LINE__ );
 167         return NULL;
 168     }
 169
 170    /* Mark the visual as slow if there are "fake" stencil bits.
 171     */
 172    for (i = 0; configs[i]; i++) {
 173       m = &configs[i]->modes;
 174       if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
 175          m->visualRating = GLX_SLOW_CONFIG;
 176       }
 177    }
 178
 179    return (const __DRIconfig **) configs;
 180 }
 181
 182 const __DRIextension *mgaScreenExtensions[] = {
 183     &driReadDrawableExtension,
 184     &driSwapControlExtension.base,
 185     &driMediaStreamCounterExtension.base,
 186     NULL
 187 };
 188
 189 static GLboolean
 190 mgaInitDriver(__DRIscreen *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(__DRIscreen *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    /* paletted_textures currently doesn't work, but we could fix them later */
 389 #if defined( need_GL_EXT_paletted_texture )
 390    { "GL_EXT_shared_texture_palette", NULL },
 391    { "GL_EXT_paletted_texture",       GL_EXT_paletted_texture_functions },
 392 #endif
 393    { "GL_EXT_secondary_color",        GL_EXT_secondary_color_functions },
 394    { "GL_EXT_stencil_wrap",           NULL },
 395    { "GL_APPLE_vertex_array_object",  GL_APPLE_vertex_array_object_functions },
 396    { "GL_MESA_ycbcr_texture",         NULL },
 397    { NULL,                            NULL }
 398 };
 399
 400 static const struct dri_extension ARB_vp_extensions[] = {
 401    { "GL_ARB_vertex_program",         GL_ARB_vertex_program_functions },
 402    { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
 403    { NULL,                            NULL }
 404 };
 405
 406 static const struct dri_extension NV_vp_extensions[] = {
 407    { "GL_NV_vertex_program",          GL_NV_vertex_program_functions },
 408    { "GL_NV_vertex_program1_1",       NULL },
 409    { NULL,                            NULL }
 410 };
 411
 412 static const struct dri_debug_control debug_control[] =
 413 {
 414     { "fall",  DEBUG_VERBOSE_FALLBACK },
 415     { "tex",   DEBUG_VERBOSE_TEXTURE },
 416     { "ioctl", DEBUG_VERBOSE_IOCTL },
 417     { "verb",  DEBUG_VERBOSE_MSG },
 418     { "dri",   DEBUG_VERBOSE_DRI },
 419     { NULL,    0 }
 420 };
 421
 422
 423 static GLboolean
 424 mgaCreateContext( gl_api api,
 425                   const __GLcontextModes *mesaVis,
 426                   __DRIcontext *driContextPriv,
 427                   void *sharedContextPrivate )
 428 {
 429    int i;
 430    unsigned   maxlevels;
 431    GLcontext *ctx, *shareCtx;
 432    mgaContextPtr mmesa;
 433    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 434    mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *)sPriv->private;
 435    drm_mga_sarea_t *saPriv = (drm_mga_sarea_t *)(((char*)sPriv->pSAREA)+
 436                                               mgaScreen->sarea_priv_offset);
 437    struct dd_function_table functions;
 438
 439    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 440       fprintf(stderr, "mgaCreateContext\n");
 441
 442    /* allocate mga context */
 443    mmesa = (mgaContextPtr) CALLOC(sizeof(mgaContext));
 444    if (!mmesa) {
 445       return GL_FALSE;
 446    }
 447
 448    /* Init default driver functions then plug in our Radeon-specific functions
 449     * (the texture functions are especially important)
 450     */
 451    _mesa_init_driver_functions( &functions );
 452    mgaInitDriverFuncs( &functions );
 453    mgaInitTextureFuncs( &functions );
 454    mgaInitIoctlFuncs( &functions );
 455
 456    /* Allocate the Mesa context */
 457    if (sharedContextPrivate)
 458       shareCtx = ((mgaContextPtr) sharedContextPrivate)->glCtx;
 459    else
 460       shareCtx = NULL;
 461    mmesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 462                                        &functions, (void *) mmesa);
 463    if (!mmesa->glCtx) {
 464       FREE(mmesa);
 465       return GL_FALSE;
 466    }
 467    driContextPriv->driverPrivate = mmesa;
 468
 469    /* Init mga state */
 470    mmesa->hHWContext = driContextPriv->hHWContext;
 471    mmesa->driFd = sPriv->fd;
 472    mmesa->driHwLock = &sPriv->pSAREA->lock;
 473
 474    mmesa->mgaScreen = mgaScreen;
 475    mmesa->driScreen = sPriv;
 476    mmesa->sarea = (void *)saPriv;
 477
 478    /* Parse configuration files */
 479    driParseConfigFiles (&mmesa->optionCache, &mgaScreen->optionCache,
 480                         sPriv->myNum, "mga");
 481
 482    (void) memset( mmesa->texture_heaps, 0, sizeof( mmesa->texture_heaps ) );
 483    make_empty_list( & mmesa->swapped );
 484
 485    mmesa->nr_heaps = mgaScreen->texVirtual[MGA_AGP_HEAP] ? 2 : 1;
 486    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 487       mmesa->texture_heaps[i] = driCreateTextureHeap( i, mmesa,
 488             mgaScreen->textureSize[i],
 489             6,
 490             MGA_NR_TEX_REGIONS,
 491             (drmTextureRegionPtr)mmesa->sarea->texList[i],
 492             &mmesa->sarea->texAge[i],
 493             &mmesa->swapped,
 494             sizeof( mgaTextureObject_t ),
 495             (destroy_texture_object_t *) mgaDestroyTexObj );
 496    }
 497
 498    /* Set the maximum texture size small enough that we can guarentee
 499     * that both texture units can bind a maximal texture and have them
 500     * on the card at once.
 501     */
 502    ctx = mmesa->glCtx;
 503    if ( mgaScreen->chipset == MGA_CARD_TYPE_G200 ) {
 504       ctx->Const.MaxTextureUnits = 1;
 505       ctx->Const.MaxTextureImageUnits = 1;
 506       ctx->Const.MaxTextureCoordUnits = 1;
 507       maxlevels = G200_TEX_MAXLEVELS;
 508
 509    }
 510    else {
 511       ctx->Const.MaxTextureUnits = 2;
 512       ctx->Const.MaxTextureImageUnits = 2;
 513       ctx->Const.MaxTextureCoordUnits = 2;
 514       maxlevels = G400_TEX_MAXLEVELS;
 515    }
 516
 517    driCalculateMaxTextureLevels( mmesa->texture_heaps,
 518                                  mmesa->nr_heaps,
 519                                  & ctx->Const,
 520                                  4,
 521                                  11, /* max 2D texture size is 2048x2048 */
 522                                  0,  /* 3D textures unsupported. */
 523                                  0,  /* cube textures unsupported. */
 524                                  11, /* max texture rect size is 2048x2048 */
 525                                  maxlevels,
 526                                  GL_FALSE,
 527                                  0 );
 528
 529    ctx->Const.MinLineWidth = 1.0;
 530    ctx->Const.MinLineWidthAA = 1.0;
 531    ctx->Const.MaxLineWidth = 10.0;
 532    ctx->Const.MaxLineWidthAA = 10.0;
 533    ctx->Const.LineWidthGranularity = 1.0;
 534
 535    ctx->Const.MaxDrawBuffers = 1;
 536
 537    mmesa->texture_depth = driQueryOptioni (&mmesa->optionCache,
 538                                            "texture_depth");
 539    if (mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FB)
 540       mmesa->texture_depth = ( mesaVis->rgbBits >= 24 ) ?
 541          DRI_CONF_TEXTURE_DEPTH_32 : DRI_CONF_TEXTURE_DEPTH_16;
 542    mmesa->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 543
 544    switch (mesaVis->depthBits) {
 545    case 16:
 546       mmesa->depth_scale = 1.0/(GLdouble)0xffff;
 547       mmesa->depth_clear_mask = ~0;
 548       mmesa->ClearDepth = 0xffff;
 549       break;
 550    case 24:
 551       mmesa->depth_scale = 1.0/(GLdouble)0xffffff;
 552       if (mmesa->hw_stencil) {
 553          mmesa->depth_clear_mask = 0xffffff00;
 554          mmesa->stencil_clear_mask = 0x000000ff;
 555       } else
 556          mmesa->depth_clear_mask = ~0;
 557       mmesa->ClearDepth = 0xffffff00;
 558       break;
 559    case 32:
 560       mmesa->depth_scale = 1.0/(GLdouble)0xffffffff;
 561       mmesa->depth_clear_mask = ~0;
 562       mmesa->ClearDepth = 0xffffffff;
 563       break;
 564    };
 565
 566    mmesa->haveHwStipple = GL_FALSE;
 567    mmesa->RenderIndex = -1;             /* impossible value */
 568    mmesa->dirty = ~0;
 569    mmesa->vertex_format = 0;
 570    mmesa->CurrentTexObj[0] = 0;
 571    mmesa->CurrentTexObj[1] = 0;
 572    mmesa->tmu_source[0] = 0;
 573    mmesa->tmu_source[1] = 1;
 574
 575    mmesa->texAge[0] = 0;
 576    mmesa->texAge[1] = 0;
 577
 578    /* Initialize the software rasterizer and helper modules.
 579     */
 580    _swrast_CreateContext( ctx );
 581    _vbo_CreateContext( ctx );
 582    _tnl_CreateContext( ctx );
 583
 584    _swsetup_CreateContext( ctx );
 585
 586    /* Install the customized pipeline:
 587     */
 588    _tnl_destroy_pipeline( ctx );
 589    _tnl_install_pipeline( ctx, mga_pipeline );
 590
 591    /* Configure swrast and T&L to match hardware characteristics:
 592     */
 593    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 594    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 595    _tnl_allow_pixel_fog( ctx, GL_FALSE );
 596    _tnl_allow_vertex_fog( ctx, GL_TRUE );
 597
 598    mmesa->primary_offset = mmesa->mgaScreen->primary.handle;
 599
 600    ctx->DriverCtx = (void *) mmesa;
 601    mmesa->glCtx = ctx;
 602
 603    driInitExtensions( ctx, card_extensions, GL_FALSE );
 604
 605    if (MGA_IS_G400(MGA_CONTEXT(ctx))) {
 606       driInitExtensions( ctx, g400_extensions, GL_FALSE );
 607    }
 608
 609    if ( driQueryOptionb( &mmesa->optionCache, "arb_vertex_program" ) ) {
 610       driInitExtensions(ctx, ARB_vp_extensions, GL_FALSE);
 611    }
 612
 613    if ( driQueryOptionb( &mmesa->optionCache, "nv_vertex_program" ) ) {
 614       driInitExtensions( ctx, NV_vp_extensions, GL_FALSE );
 615    }
 616
 617
 618    /* XXX these should really go right after _mesa_init_driver_functions() */
 619    mgaDDInitStateFuncs( ctx );
 620    mgaDDInitSpanFuncs( ctx );
 621    mgaDDInitPixelFuncs( ctx );
 622    mgaDDInitTriFuncs( ctx );
 623
 624    mgaInitVB( ctx );
 625    mgaInitState( mmesa );
 626
 627    driContextPriv->driverPrivate = (void *) mmesa;
 628
 629 #if DO_DEBUG
 630    MGA_DEBUG = driParseDebugString( getenv( "MGA_DEBUG" ),
 631                                     debug_control );
 632 #endif
 633
 634    (*sPriv->systemTime->getUST)( & mmesa->swap_ust );
 635
 636    if (driQueryOptionb(&mmesa->optionCache, "no_rast")) {
 637       fprintf(stderr, "disabling 3D acceleration\n");
 638       FALLBACK(mmesa->glCtx, MGA_FALLBACK_DISABLE, 1);
 639    }
 640
 641    return GL_TRUE;
 642 }
 643
 644 static void
 645 mgaDestroyContext(__DRIcontext *driContextPriv)
 646 {
 647    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 648
 649    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 650       fprintf( stderr, "[%s:%d] mgaDestroyContext start\n",
 651                __FILE__, __LINE__ );
 652
 653    assert(mmesa); /* should never be null */
 654    if (mmesa) {
 655       GLboolean   release_texture_heaps;
 656
 657
 658       release_texture_heaps = (mmesa->glCtx->Shared->RefCount == 1);
 659       _swsetup_DestroyContext( mmesa->glCtx );
 660       _tnl_DestroyContext( mmesa->glCtx );
 661       _vbo_DestroyContext( mmesa->glCtx );
 662       _swrast_DestroyContext( mmesa->glCtx );
 663
 664       mgaFreeVB( mmesa->glCtx );
 665
 666       /* free the Mesa context */
 667       mmesa->glCtx->DriverCtx = NULL;
 668       _mesa_destroy_context(mmesa->glCtx);
 669
 670       if ( release_texture_heaps ) {
 671          /* This share group is about to go away, free our private
 672           * texture object data.
 673           */
 674          int i;
 675
 676          for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 677             driDestroyTextureHeap( mmesa->texture_heaps[ i ] );
 678             mmesa->texture_heaps[ i ] = NULL;
 679          }
 680
 681          assert( is_empty_list( & mmesa->swapped ) );
 682       }
 683
 684       /* free the option cache */
 685       driDestroyOptionCache (&mmesa->optionCache);
 686
 687       FREE(mmesa);
 688    }
 689
 690    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 691       fprintf( stderr, "[%s:%d] mgaDestroyContext done\n",
 692                __FILE__, __LINE__ );
 693 }
 694
 695
 696 static GLboolean
 697 mgaCreateBuffer( __DRIscreen *driScrnPriv,
 698                  __DRIdrawable *driDrawPriv,
 699                  const __GLcontextModes *mesaVis,
 700                  GLboolean isPixmap )
 701 {
 702    mgaScreenPrivate *screen = (mgaScreenPrivate *) driScrnPriv->private;
 703
 704    if (isPixmap) {
 705       return GL_FALSE; /* not implemented */
 706    }
 707    else {
 708       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 709                              mesaVis->depthBits != 24);
 710
 711 #if 0
 712       driDrawPriv->driverPrivate = (void *)
 713          _mesa_create_framebuffer(mesaVis,
 714                                   GL_FALSE,  /* software depth buffer? */
 715                                   swStencil,
 716                                   mesaVis->accumRedBits > 0,
 717                                   mesaVis->alphaBits > 0 );
 718 #else
 719       struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
 720
 721       {
 722          driRenderbuffer *frontRb
 723             = driNewRenderbuffer(MESA_FORMAT_ARGB8888,
 724                                  NULL,
 725                                  screen->cpp,
 726                                  screen->frontOffset, screen->frontPitch,
 727                                  driDrawPriv);
 728          mgaSetSpanFunctions(frontRb, mesaVis);
 729          _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
 730       }
 731
 732       if (mesaVis->doubleBufferMode) {
 733          driRenderbuffer *backRb
 734             = driNewRenderbuffer(MESA_FORMAT_ARGB8888,
 735                                  NULL,
 736                                  screen->cpp,
 737                                  screen->backOffset, screen->backPitch,
 738                                  driDrawPriv);
 739          mgaSetSpanFunctions(backRb, mesaVis);
 740          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
 741       }
 742
 743       if (mesaVis->depthBits == 16) {
 744          driRenderbuffer *depthRb
 745             = driNewRenderbuffer(MESA_FORMAT_Z16,
 746                                  NULL,
 747                                  screen->cpp,
 748                                  screen->depthOffset, screen->depthPitch,
 749                                  driDrawPriv);
 750          mgaSetSpanFunctions(depthRb, mesaVis);
 751          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 752       }
 753       else if (mesaVis->depthBits == 24) {
 754          /* XXX is this right? */
 755          if (mesaVis->stencilBits) {
 756             driRenderbuffer *depthRb
 757                = driNewRenderbuffer(MESA_FORMAT_Z24_S8,
 758                                     NULL,
 759                                     screen->cpp,
 760                                     screen->depthOffset, screen->depthPitch,
 761                                     driDrawPriv);
 762             mgaSetSpanFunctions(depthRb, mesaVis);
 763             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 764          }
 765          else {
 766             driRenderbuffer *depthRb
 767                = driNewRenderbuffer(MESA_FORMAT_Z32,
 768                                     NULL,
 769                                     screen->cpp,
 770                                     screen->depthOffset, screen->depthPitch,
 771                                     driDrawPriv);
 772             mgaSetSpanFunctions(depthRb, mesaVis);
 773             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 774          }
 775       }
 776       else if (mesaVis->depthBits == 32) {
 777          driRenderbuffer *depthRb
 778             = driNewRenderbuffer(MESA_FORMAT_Z32,
 779                                  NULL,
 780                                  screen->cpp,
 781                                  screen->depthOffset, screen->depthPitch,
 782                                  driDrawPriv);
 783          mgaSetSpanFunctions(depthRb, mesaVis);
 784          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 785       }
 786
 787       if (mesaVis->stencilBits > 0 && !swStencil) {
 788          driRenderbuffer *stencilRb
 789             = driNewRenderbuffer(MESA_FORMAT_S8,
 790                                  NULL,
 791                                  screen->cpp,
 792                                  screen->depthOffset, screen->depthPitch,
 793                                  driDrawPriv);
 794          mgaSetSpanFunctions(stencilRb, mesaVis);
 795          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
 796       }
 797
 798       _mesa_add_soft_renderbuffers(fb,
 799                                    GL_FALSE, /* color */
 800                                    GL_FALSE, /* depth */
 801                                    swStencil,
 802                                    mesaVis->accumRedBits > 0,
 803                                    GL_FALSE, /* alpha */
 804                                    GL_FALSE /* aux */);
 805       driDrawPriv->driverPrivate = (void *) fb;
 806 #endif
 807
 808       return (driDrawPriv->driverPrivate != NULL);
 809    }
 810 }
 811
 812
 813 static void
 814 mgaDestroyBuffer(__DRIdrawable *driDrawPriv)
 815 {
 816    _mesa_reference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)), NULL);
 817 }
 818
 819 static void
 820 mgaSwapBuffers(__DRIdrawable *dPriv)
 821 {
 822    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 823       mgaContextPtr mmesa;
 824       GLcontext *ctx;
 825       mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 826       ctx = mmesa->glCtx;
 827
 828       if (ctx->Visual.doubleBufferMode) {
 829          _mesa_notifySwapBuffers( ctx );
 830          mgaCopyBuffer( dPriv );
 831       }
 832    } else {
 833       /* XXX this shouldn't be an error but we can't handle it for now */
 834       _mesa_problem(NULL, "%s: drawable has no context!\n", __FUNCTION__);
 835    }
 836 }
 837
 838 static GLboolean
 839 mgaUnbindContext(__DRIcontext *driContextPriv)
 840 {
 841    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 842    if (mmesa)
 843       mmesa->dirty = ~0;
 844
 845    return GL_TRUE;
 846 }
 847
 848 /* This looks buggy to me - the 'b' variable isn't used anywhere...
 849  * Hmm - It seems that the drawable is already hooked in to
 850  * driDrawablePriv.
 851  *
 852  * But why are we doing context initialization here???
 853  */
 854 static GLboolean
 855 mgaMakeCurrent(__DRIcontext *driContextPriv,
 856                __DRIdrawable *driDrawPriv,
 857                __DRIdrawable *driReadPriv)
 858 {
 859    if (driContextPriv) {
 860       mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 861
 862       if (mmesa->driDrawable != driDrawPriv) {
 863          if (driDrawPriv->swap_interval == (unsigned)-1) {
 864             driDrawPriv->vblFlags = (mmesa->mgaScreen->irq == 0)
 865                ? VBLANK_FLAG_NO_IRQ
 866                : driGetDefaultVBlankFlags(&mmesa->optionCache);
 867
 868             driDrawableInitVBlank( driDrawPriv );
 869          }
 870
 871          mmesa->driDrawable = driDrawPriv;
 872          mmesa->dirty = ~0;
 873          mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 874       }
 875
 876       mmesa->driReadable = driReadPriv;
 877
 878       _mesa_make_current(mmesa->glCtx,
 879                          (GLframebuffer *) driDrawPriv->driverPrivate,
 880                          (GLframebuffer *) driReadPriv->driverPrivate);
 881    }
 882    else {
 883       _mesa_make_current(NULL, NULL, NULL);
 884    }
 885
 886    return GL_TRUE;
 887 }
 888
 889
 890 void mgaGetLock( mgaContextPtr mmesa, GLuint flags )
 891 {
 892    __DRIdrawable *dPriv = mmesa->driDrawable;
 893    drm_mga_sarea_t *sarea = mmesa->sarea;
 894    int me = mmesa->hHWContext;
 895    int i;
 896
 897    drmGetLock(mmesa->driFd, mmesa->hHWContext, flags);
 898
 899    DRI_VALIDATE_DRAWABLE_INFO( mmesa->driScreen, dPriv );
 900    if (*(dPriv->pStamp) != mmesa->lastStamp) {
 901       mmesa->lastStamp = *(dPriv->pStamp);
 902       mmesa->SetupNewInputs |= VERT_BIT_POS;
 903       mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 904       mgaUpdateRects( mmesa, (MGA_FRONT|MGA_BACK) );
 905       driUpdateFramebufferSize(mmesa->glCtx, dPriv);
 906    }
 907
 908    mmesa->dirty |= MGA_UPLOAD_CONTEXT | MGA_UPLOAD_CLIPRECTS;
 909
 910    mmesa->sarea->dirty |= MGA_UPLOAD_CONTEXT;
 911
 912    if (sarea->ctxOwner != me) {
 913       mmesa->dirty |= (MGA_UPLOAD_CONTEXT | MGA_UPLOAD_TEX0 |
 914                        MGA_UPLOAD_TEX1 | MGA_UPLOAD_PIPE);
 915       sarea->ctxOwner=me;
 916    }
 917
 918    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 919       DRI_AGE_TEXTURES( mmesa->texture_heaps[ i ] );
 920    }
 921 }
 922
 923
 924 /**
 925  * This is the driver specific part of the createNewScreen entry point.
 926  *
 927  * \todo maybe fold this into intelInitDriver
 928  *
 929  * \return the __GLcontextModes supported by this driver
 930  */
 931 static const __DRIconfig **mgaInitScreen(__DRIscreen *psp)
 932 {
 933    static const __DRIversion ddx_expected = { 1, 2, 0 };
 934    static const __DRIversion dri_expected = { 4, 0, 0 };
 935    static const __DRIversion drm_expected = { 3, 0, 0 };
 936    MGADRIPtr dri_priv = (MGADRIPtr) psp->pDevPriv;
 937
 938    if ( ! driCheckDriDdxDrmVersions2( "MGA",
 939                                       &psp->dri_version, & dri_expected,
 940                                       &psp->ddx_version, & ddx_expected,
 941                                       &psp->drm_version, & drm_expected ) )
 942       return NULL;
 943
 944
 945    if (!mgaInitDriver(psp))
 946        return NULL;
 947
 948    return mgaFillInModes( psp,
 949                           dri_priv->cpp * 8,
 950                           (dri_priv->cpp == 2) ? 16 : 24,
 951                           (dri_priv->cpp == 2) ? 0  : 8,
 952                           (dri_priv->backOffset != dri_priv->depthOffset) );
 953 }
 954
 955
 956 /**
 957  * Get information about previous buffer swaps.
 958  */
 959 static int
 960 getSwapInfo( __DRIdrawable *dPriv, __DRIswapInfo * sInfo )
 961 {
 962    mgaContextPtr  mmesa;
 963
 964    if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
 965         || (dPriv->driContextPriv->driverPrivate == NULL)
 966         || (sInfo == NULL) ) {
 967       return -1;
 968    }
 969
 970    mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 971    sInfo->swap_count = mmesa->swap_count;
 972    sInfo->swap_ust = mmesa->swap_ust;
 973    sInfo->swap_missed_count = mmesa->swap_missed_count;
 974
 975    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
 976        ? driCalculateSwapUsage( dPriv, 0, mmesa->swap_missed_ust )
 977        : 0.0;
 978
 979    return 0;
 980 }
 981
 982 const struct __DriverAPIRec driDriverAPI = {
 983    .InitScreen      = mgaInitScreen,
 984    .DestroyScreen   = mgaDestroyScreen,
 985    .CreateContext   = mgaCreateContext,
 986    .DestroyContext  = mgaDestroyContext,
 987    .CreateBuffer    = mgaCreateBuffer,
 988    .DestroyBuffer   = mgaDestroyBuffer,
 989    .SwapBuffers     = mgaSwapBuffers,
 990    .MakeCurrent     = mgaMakeCurrent,
 991    .UnbindContext   = mgaUnbindContext,
 992    .GetSwapInfo     = getSwapInfo,
 993    .GetDrawableMSC  = driDrawableGetMSC32,
 994    .WaitForMSC      = driWaitForMSC32,
 995    .WaitForSBC      = NULL,
 996    .SwapBuffersMSC  = NULL
 997 };
 998
 999 /* This is the table of extensions that the loader will dlsym() for. */
1000 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1001     &driCoreExtension.base,
1002     &driLegacyExtension.base,
1003     NULL
1004 };