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     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);
 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     &driFrameTrackingExtension.base,
 186     &driMediaStreamCounterExtension.base,
 187     NULL
 188 };
 189
 190 static GLboolean
 191 mgaInitDriver(__DRIscreenPrivate *sPriv)
 192 {
 193    mgaScreenPrivate *mgaScreen;
 194    MGADRIPtr         serverInfo = (MGADRIPtr)sPriv->pDevPriv;
 195
 196    if (sPriv->devPrivSize != sizeof(MGADRIRec)) {
 197       fprintf(stderr,"\nERROR!  sizeof(MGADRIRec) does not match passed size from device driver\n");
 198       return GL_FALSE;
 199    }
 200
 201    /* Allocate the private area */
 202    mgaScreen = (mgaScreenPrivate *)MALLOC(sizeof(mgaScreenPrivate));
 203    if (!mgaScreen) {
 204       __driUtilMessage("Couldn't malloc screen struct");
 205       return GL_FALSE;
 206    }
 207
 208    mgaScreen->sPriv = sPriv;
 209    sPriv->private = (void *)mgaScreen;
 210
 211    if (sPriv->drm_version.minor >= 1) {
 212       int ret;
 213       drm_mga_getparam_t gp;
 214
 215       gp.param = MGA_PARAM_IRQ_NR;
 216       gp.value = &mgaScreen->irq;
 217       mgaScreen->irq = 0;
 218
 219       ret = drmCommandWriteRead( sPriv->fd, DRM_MGA_GETPARAM,
 220                                     &gp, sizeof(gp));
 221       if (ret) {
 222             fprintf(stderr, "drmMgaGetParam (MGA_PARAM_IRQ_NR): %d\n", ret);
 223             FREE(mgaScreen);
 224             sPriv->private = NULL;
 225             return GL_FALSE;
 226       }
 227    }
 228
 229    sPriv->extensions = mgaScreenExtensions;
 230
 231    if (serverInfo->chipset != MGA_CARD_TYPE_G200 &&
 232        serverInfo->chipset != MGA_CARD_TYPE_G400) {
 233       FREE(mgaScreen);
 234       sPriv->private = NULL;
 235       __driUtilMessage("Unrecognized chipset");
 236       return GL_FALSE;
 237    }
 238
 239
 240    mgaScreen->chipset = serverInfo->chipset;
 241    mgaScreen->cpp = serverInfo->cpp;
 242
 243    mgaScreen->agpMode = serverInfo->agpMode;
 244
 245    mgaScreen->frontPitch = serverInfo->frontPitch;
 246    mgaScreen->frontOffset = serverInfo->frontOffset;
 247    mgaScreen->backOffset = serverInfo->backOffset;
 248    mgaScreen->backPitch  =  serverInfo->backPitch;
 249    mgaScreen->depthOffset = serverInfo->depthOffset;
 250    mgaScreen->depthPitch  =  serverInfo->depthPitch;
 251
 252
 253    /* The only reason that the MMIO region needs to be accessable and the
 254     * primary DMA region base address needs to be known is so that the driver
 255     * can busy wait for certain DMA operations to complete (see
 256     * mgaWaitForFrameCompletion in mgaioctl.c).
 257     *
 258     * Starting with MGA DRM version 3.2, these are completely unneeded as
 259     * there is a new, in-kernel mechanism for handling the wait.
 260     */
 261
 262    if (mgaScreen->sPriv->drm_version.minor < 2) {
 263       mgaScreen->mmio.handle = serverInfo->registers.handle;
 264       mgaScreen->mmio.size = serverInfo->registers.size;
 265       if ( drmMap( sPriv->fd,
 266                    mgaScreen->mmio.handle, mgaScreen->mmio.size,
 267                    &mgaScreen->mmio.map ) < 0 ) {
 268          FREE( mgaScreen );
 269          sPriv->private = NULL;
 270          __driUtilMessage( "Couldn't map MMIO registers" );
 271          return GL_FALSE;
 272       }
 273
 274       mgaScreen->primary.handle = serverInfo->primary.handle;
 275       mgaScreen->primary.size = serverInfo->primary.size;
 276    }
 277    else {
 278       (void) memset( & mgaScreen->primary, 0, sizeof( mgaScreen->primary ) );
 279       (void) memset( & mgaScreen->mmio, 0, sizeof( mgaScreen->mmio ) );
 280    }
 281
 282    mgaScreen->textureOffset[MGA_CARD_HEAP] = serverInfo->textureOffset;
 283    mgaScreen->textureOffset[MGA_AGP_HEAP] = (serverInfo->agpTextureOffset |
 284                                              PDEA_pagpxfer_enable | 1);
 285
 286    mgaScreen->textureSize[MGA_CARD_HEAP] = serverInfo->textureSize;
 287    mgaScreen->textureSize[MGA_AGP_HEAP] = serverInfo->agpTextureSize;
 288
 289
 290    /* The texVirtual array stores the base addresses in the CPU's address
 291     * space of the texture memory pools.  The base address of the on-card
 292     * memory pool is calculated as an offset of the base of video memory.  The
 293     * AGP texture pool has to be mapped into the processes address space by
 294     * the DRM.
 295     */
 296
 297    mgaScreen->texVirtual[MGA_CARD_HEAP] = (char *)(mgaScreen->sPriv->pFB +
 298                                            serverInfo->textureOffset);
 299
 300    if ( serverInfo->agpTextureSize > 0 ) {
 301       if (drmMap(sPriv->fd, serverInfo->agpTextureOffset,
 302                  serverInfo->agpTextureSize,
 303                  (drmAddress *)&mgaScreen->texVirtual[MGA_AGP_HEAP]) != 0) {
 304          FREE(mgaScreen);
 305          sPriv->private = NULL;
 306          __driUtilMessage("Couldn't map agptexture region");
 307          return GL_FALSE;
 308       }
 309    }
 310
 311
 312    /* For calculating setupdma addresses.
 313     */
 314
 315    mgaScreen->bufs = drmMapBufs(sPriv->fd);
 316    if (!mgaScreen->bufs) {
 317       FREE(mgaScreen);
 318       sPriv->private = NULL;
 319       __driUtilMessage("Couldn't map dma buffers");
 320       return GL_FALSE;
 321    }
 322    mgaScreen->sarea_priv_offset = serverInfo->sarea_priv_offset;
 323
 324    /* parse information in __driConfigOptions */
 325    driParseOptionInfo (&mgaScreen->optionCache,
 326                        __driConfigOptions, __driNConfigOptions);
 327
 328    return GL_TRUE;
 329 }
 330
 331
 332 static void
 333 mgaDestroyScreen(__DRIscreenPrivate *sPriv)
 334 {
 335    mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *) sPriv->private;
 336
 337    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 338       fprintf(stderr, "mgaDestroyScreen\n");
 339
 340    drmUnmapBufs(mgaScreen->bufs);
 341
 342
 343    /* free all option information */
 344    driDestroyOptionInfo (&mgaScreen->optionCache);
 345
 346    FREE(mgaScreen);
 347    sPriv->private = NULL;
 348 }
 349
 350
 351 extern const struct tnl_pipeline_stage _mga_render_stage;
 352
 353 static const struct tnl_pipeline_stage *mga_pipeline[] = {
 354    &_tnl_vertex_transform_stage,
 355    &_tnl_normal_transform_stage,
 356    &_tnl_lighting_stage,
 357    &_tnl_fog_coordinate_stage,
 358    &_tnl_texgen_stage,
 359    &_tnl_texture_transform_stage,
 360    &_tnl_vertex_program_stage,
 361
 362                                 /* REMOVE: point attenuation stage */
 363 #if 0
 364    &_mga_render_stage,          /* ADD: unclipped rastersetup-to-dma */
 365                                 /* Need new ioctl for wacceptseq */
 366 #endif
 367    &_tnl_render_stage,
 368    0,
 369 };
 370
 371
 372 static const struct dri_extension g400_extensions[] =
 373 {
 374    { "GL_ARB_multitexture",           NULL },
 375    { "GL_ARB_texture_env_add",        NULL },
 376    { "GL_ARB_texture_env_combine",    NULL },
 377    { "GL_ARB_texture_env_crossbar",   NULL },
 378    { "GL_EXT_texture_env_combine",    NULL },
 379    { "GL_EXT_texture_edge_clamp",     NULL },
 380    { "GL_ATI_texture_env_combine3",   NULL },
 381    { NULL,                            NULL }
 382 };
 383
 384 static const struct dri_extension card_extensions[] =
 385 {
 386    { "GL_ARB_texture_rectangle",      NULL },
 387    { "GL_EXT_blend_logic_op",         NULL },
 388    { "GL_EXT_fog_coord",              GL_EXT_fog_coord_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    ctx->Const.MaxDrawBuffers = 1;
 537
 538    mmesa->texture_depth = driQueryOptioni (&mmesa->optionCache,
 539                                            "texture_depth");
 540    if (mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FB)
 541       mmesa->texture_depth = ( mesaVis->rgbBits >= 24 ) ?
 542          DRI_CONF_TEXTURE_DEPTH_32 : DRI_CONF_TEXTURE_DEPTH_16;
 543    mmesa->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 544
 545    switch (mesaVis->depthBits) {
 546    case 16:
 547       mmesa->depth_scale = 1.0/(GLdouble)0xffff;
 548       mmesa->depth_clear_mask = ~0;
 549       mmesa->ClearDepth = 0xffff;
 550       break;
 551    case 24:
 552       mmesa->depth_scale = 1.0/(GLdouble)0xffffff;
 553       if (mmesa->hw_stencil) {
 554          mmesa->depth_clear_mask = 0xffffff00;
 555          mmesa->stencil_clear_mask = 0x000000ff;
 556       } else
 557          mmesa->depth_clear_mask = ~0;
 558       mmesa->ClearDepth = 0xffffff00;
 559       break;
 560    case 32:
 561       mmesa->depth_scale = 1.0/(GLdouble)0xffffffff;
 562       mmesa->depth_clear_mask = ~0;
 563       mmesa->ClearDepth = 0xffffffff;
 564       break;
 565    };
 566
 567    mmesa->haveHwStipple = GL_FALSE;
 568    mmesa->RenderIndex = -1;             /* impossible value */
 569    mmesa->dirty = ~0;
 570    mmesa->vertex_format = 0;
 571    mmesa->CurrentTexObj[0] = 0;
 572    mmesa->CurrentTexObj[1] = 0;
 573    mmesa->tmu_source[0] = 0;
 574    mmesa->tmu_source[1] = 1;
 575
 576    mmesa->texAge[0] = 0;
 577    mmesa->texAge[1] = 0;
 578
 579    /* Initialize the software rasterizer and helper modules.
 580     */
 581    _swrast_CreateContext( ctx );
 582    _vbo_CreateContext( ctx );
 583    _tnl_CreateContext( ctx );
 584
 585    _swsetup_CreateContext( ctx );
 586
 587    /* Install the customized pipeline:
 588     */
 589    _tnl_destroy_pipeline( ctx );
 590    _tnl_install_pipeline( ctx, mga_pipeline );
 591
 592    /* Configure swrast and T&L to match hardware characteristics:
 593     */
 594    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 595    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 596    _tnl_allow_pixel_fog( ctx, GL_FALSE );
 597    _tnl_allow_vertex_fog( ctx, GL_TRUE );
 598
 599    mmesa->primary_offset = mmesa->mgaScreen->primary.handle;
 600
 601    ctx->DriverCtx = (void *) mmesa;
 602    mmesa->glCtx = ctx;
 603
 604    driInitExtensions( ctx, card_extensions, GL_FALSE );
 605
 606    if (MGA_IS_G400(MGA_CONTEXT(ctx))) {
 607       driInitExtensions( ctx, g400_extensions, GL_FALSE );
 608    }
 609
 610    if ( driQueryOptionb( &mmesa->optionCache, "arb_vertex_program" ) ) {
 611       driInitExtensions(ctx, ARB_vp_extensions, GL_FALSE);
 612    }
 613
 614    if ( driQueryOptionb( &mmesa->optionCache, "nv_vertex_program" ) ) {
 615       driInitExtensions( ctx, NV_vp_extensions, GL_FALSE );
 616    }
 617
 618
 619    /* XXX these should really go right after _mesa_init_driver_functions() */
 620    mgaDDInitStateFuncs( ctx );
 621    mgaDDInitSpanFuncs( ctx );
 622    mgaDDInitPixelFuncs( ctx );
 623    mgaDDInitTriFuncs( ctx );
 624
 625    mgaInitVB( ctx );
 626    mgaInitState( mmesa );
 627
 628    driContextPriv->driverPrivate = (void *) mmesa;
 629
 630 #if DO_DEBUG
 631    MGA_DEBUG = driParseDebugString( getenv( "MGA_DEBUG" ),
 632                                     debug_control );
 633 #endif
 634
 635    (*sPriv->systemTime->getUST)( & mmesa->swap_ust );
 636
 637    if (driQueryOptionb(&mmesa->optionCache, "no_rast")) {
 638       fprintf(stderr, "disabling 3D acceleration\n");
 639       FALLBACK(mmesa->glCtx, MGA_FALLBACK_DISABLE, 1);
 640    }
 641
 642    return GL_TRUE;
 643 }
 644
 645 static void
 646 mgaDestroyContext(__DRIcontextPrivate *driContextPriv)
 647 {
 648    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 649
 650    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 651       fprintf( stderr, "[%s:%d] mgaDestroyContext start\n",
 652                __FILE__, __LINE__ );
 653
 654    assert(mmesa); /* should never be null */
 655    if (mmesa) {
 656       GLboolean   release_texture_heaps;
 657
 658
 659       release_texture_heaps = (mmesa->glCtx->Shared->RefCount == 1);
 660       _swsetup_DestroyContext( mmesa->glCtx );
 661       _tnl_DestroyContext( mmesa->glCtx );
 662       _vbo_DestroyContext( mmesa->glCtx );
 663       _swrast_DestroyContext( mmesa->glCtx );
 664
 665       mgaFreeVB( mmesa->glCtx );
 666
 667       /* free the Mesa context */
 668       mmesa->glCtx->DriverCtx = NULL;
 669       _mesa_destroy_context(mmesa->glCtx);
 670
 671       if ( release_texture_heaps ) {
 672          /* This share group is about to go away, free our private
 673           * texture object data.
 674           */
 675          int i;
 676
 677          for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 678             driDestroyTextureHeap( mmesa->texture_heaps[ i ] );
 679             mmesa->texture_heaps[ i ] = NULL;
 680          }
 681
 682          assert( is_empty_list( & mmesa->swapped ) );
 683       }
 684
 685       /* free the option cache */
 686       driDestroyOptionCache (&mmesa->optionCache);
 687
 688       FREE(mmesa);
 689    }
 690
 691    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 692       fprintf( stderr, "[%s:%d] mgaDestroyContext done\n",
 693                __FILE__, __LINE__ );
 694 }
 695
 696
 697 static GLboolean
 698 mgaCreateBuffer( __DRIscreenPrivate *driScrnPriv,
 699                  __DRIdrawablePrivate *driDrawPriv,
 700                  const __GLcontextModes *mesaVis,
 701                  GLboolean isPixmap )
 702 {
 703    mgaScreenPrivate *screen = (mgaScreenPrivate *) driScrnPriv->private;
 704
 705    if (isPixmap) {
 706       return GL_FALSE; /* not implemented */
 707    }
 708    else {
 709       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 710                              mesaVis->depthBits != 24);
 711
 712 #if 0
 713       driDrawPriv->driverPrivate = (void *)
 714          _mesa_create_framebuffer(mesaVis,
 715                                   GL_FALSE,  /* software depth buffer? */
 716                                   swStencil,
 717                                   mesaVis->accumRedBits > 0,
 718                                   mesaVis->alphaBits > 0 );
 719 #else
 720       struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
 721
 722       {
 723          driRenderbuffer *frontRb
 724             = driNewRenderbuffer(GL_RGBA,
 725                                  NULL,
 726                                  screen->cpp,
 727                                  screen->frontOffset, screen->frontPitch,
 728                                  driDrawPriv);
 729          mgaSetSpanFunctions(frontRb, mesaVis);
 730          _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
 731       }
 732
 733       if (mesaVis->doubleBufferMode) {
 734          driRenderbuffer *backRb
 735             = driNewRenderbuffer(GL_RGBA,
 736                                  NULL,
 737                                  screen->cpp,
 738                                  screen->backOffset, screen->backPitch,
 739                                  driDrawPriv);
 740          mgaSetSpanFunctions(backRb, mesaVis);
 741          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
 742       }
 743
 744       if (mesaVis->depthBits == 16) {
 745          driRenderbuffer *depthRb
 746             = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
 747                                  NULL,
 748                                  screen->cpp,
 749                                  screen->depthOffset, screen->depthPitch,
 750                                  driDrawPriv);
 751          mgaSetSpanFunctions(depthRb, mesaVis);
 752          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 753       }
 754       else if (mesaVis->depthBits == 24) {
 755          /* XXX is this right? */
 756          if (mesaVis->stencilBits) {
 757             driRenderbuffer *depthRb
 758                = driNewRenderbuffer(GL_DEPTH_COMPONENT24,
 759                                     NULL,
 760                                     screen->cpp,
 761                                     screen->depthOffset, screen->depthPitch,
 762                                     driDrawPriv);
 763             mgaSetSpanFunctions(depthRb, mesaVis);
 764             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 765          }
 766          else {
 767             driRenderbuffer *depthRb
 768                = driNewRenderbuffer(GL_DEPTH_COMPONENT32,
 769                                     NULL,
 770                                     screen->cpp,
 771                                     screen->depthOffset, screen->depthPitch,
 772                                     driDrawPriv);
 773             mgaSetSpanFunctions(depthRb, mesaVis);
 774             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 775          }
 776       }
 777       else if (mesaVis->depthBits == 32) {
 778          driRenderbuffer *depthRb
 779             = driNewRenderbuffer(GL_DEPTH_COMPONENT32,
 780                                  NULL,
 781                                  screen->cpp,
 782                                  screen->depthOffset, screen->depthPitch,
 783                                  driDrawPriv);
 784          mgaSetSpanFunctions(depthRb, mesaVis);
 785          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 786       }
 787
 788       if (mesaVis->stencilBits > 0 && !swStencil) {
 789          driRenderbuffer *stencilRb
 790             = driNewRenderbuffer(GL_STENCIL_INDEX8_EXT,
 791                                  NULL,
 792                                  screen->cpp,
 793                                  screen->depthOffset, screen->depthPitch,
 794                                  driDrawPriv);
 795          mgaSetSpanFunctions(stencilRb, mesaVis);
 796          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
 797       }
 798
 799       _mesa_add_soft_renderbuffers(fb,
 800                                    GL_FALSE, /* color */
 801                                    GL_FALSE, /* depth */
 802                                    swStencil,
 803                                    mesaVis->accumRedBits > 0,
 804                                    GL_FALSE, /* alpha */
 805                                    GL_FALSE /* aux */);
 806       driDrawPriv->driverPrivate = (void *) fb;
 807 #endif
 808
 809       return (driDrawPriv->driverPrivate != NULL);
 810    }
 811 }
 812
 813
 814 static void
 815 mgaDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
 816 {
 817    _mesa_unreference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)));
 818 }
 819
 820 static void
 821 mgaSwapBuffers(__DRIdrawablePrivate *dPriv)
 822 {
 823    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 824       mgaContextPtr mmesa;
 825       GLcontext *ctx;
 826       mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 827       ctx = mmesa->glCtx;
 828
 829       if (ctx->Visual.doubleBufferMode) {
 830          _mesa_notifySwapBuffers( ctx );
 831          mgaCopyBuffer( dPriv );
 832       }
 833    } else {
 834       /* XXX this shouldn't be an error but we can't handle it for now */
 835       _mesa_problem(NULL, "%s: drawable has no context!\n", __FUNCTION__);
 836    }
 837 }
 838
 839 static GLboolean
 840 mgaUnbindContext(__DRIcontextPrivate *driContextPriv)
 841 {
 842    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 843    if (mmesa)
 844       mmesa->dirty = ~0;
 845
 846    return GL_TRUE;
 847 }
 848
 849 /* This looks buggy to me - the 'b' variable isn't used anywhere...
 850  * Hmm - It seems that the drawable is already hooked in to
 851  * driDrawablePriv.
 852  *
 853  * But why are we doing context initialization here???
 854  */
 855 static GLboolean
 856 mgaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 857                __DRIdrawablePrivate *driDrawPriv,
 858                __DRIdrawablePrivate *driReadPriv)
 859 {
 860    if (driContextPriv) {
 861       mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 862
 863       if (mmesa->driDrawable != driDrawPriv) {
 864          if (driDrawPriv->swap_interval == (unsigned)-1) {
 865             driDrawPriv->vblFlags = (mmesa->mgaScreen->irq == 0)
 866                ? VBLANK_FLAG_NO_IRQ
 867                : driGetDefaultVBlankFlags(&mmesa->optionCache);
 868
 869             driDrawableInitVBlank( driDrawPriv );
 870          }
 871
 872          mmesa->driDrawable = driDrawPriv;
 873          mmesa->dirty = ~0;
 874          mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 875       }
 876
 877       mmesa->driReadable = driReadPriv;
 878
 879       _mesa_make_current(mmesa->glCtx,
 880                          (GLframebuffer *) driDrawPriv->driverPrivate,
 881                          (GLframebuffer *) driReadPriv->driverPrivate);
 882    }
 883    else {
 884       _mesa_make_current(NULL, NULL, NULL);
 885    }
 886
 887    return GL_TRUE;
 888 }
 889
 890
 891 void mgaGetLock( mgaContextPtr mmesa, GLuint flags )
 892 {
 893    __DRIdrawablePrivate *dPriv = mmesa->driDrawable;
 894    drm_mga_sarea_t *sarea = mmesa->sarea;
 895    int me = mmesa->hHWContext;
 896    int i;
 897
 898    drmGetLock(mmesa->driFd, mmesa->hHWContext, flags);
 899
 900    DRI_VALIDATE_DRAWABLE_INFO( mmesa->driScreen, dPriv );
 901    if (*(dPriv->pStamp) != mmesa->lastStamp) {
 902       mmesa->lastStamp = *(dPriv->pStamp);
 903       mmesa->SetupNewInputs |= VERT_BIT_POS;
 904       mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 905       mgaUpdateRects( mmesa, (MGA_FRONT|MGA_BACK) );
 906       driUpdateFramebufferSize(mmesa->glCtx, dPriv);
 907    }
 908
 909    mmesa->dirty |= MGA_UPLOAD_CONTEXT | MGA_UPLOAD_CLIPRECTS;
 910
 911    mmesa->sarea->dirty |= MGA_UPLOAD_CONTEXT;
 912
 913    if (sarea->ctxOwner != me) {
 914       mmesa->dirty |= (MGA_UPLOAD_CONTEXT | MGA_UPLOAD_TEX0 |
 915                        MGA_UPLOAD_TEX1 | MGA_UPLOAD_PIPE);
 916       sarea->ctxOwner=me;
 917    }
 918
 919    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 920       DRI_AGE_TEXTURES( mmesa->texture_heaps[ i ] );
 921    }
 922 }
 923
 924
 925 /**
 926  * This is the driver specific part of the createNewScreen entry point.
 927  *
 928  * \todo maybe fold this into intelInitDriver
 929  *
 930  * \return the __GLcontextModes supported by this driver
 931  */
 932 static const __DRIconfig **mgaInitScreen(__DRIscreen *psp)
 933 {
 934    static const __DRIversion ddx_expected = { 1, 2, 0 };
 935    static const __DRIversion dri_expected = { 4, 0, 0 };
 936    static const __DRIversion drm_expected = { 3, 0, 0 };
 937    MGADRIPtr dri_priv = (MGADRIPtr) psp->pDevPriv;
 938
 939    if ( ! driCheckDriDdxDrmVersions2( "MGA",
 940                                       &psp->dri_version, & dri_expected,
 941                                       &psp->ddx_version, & ddx_expected,
 942                                       &psp->drm_version, & drm_expected ) )
 943       return NULL;
 944
 945
 946    /* Calling driInitExtensions here, with a NULL context pointer,
 947     * does not actually enable the extensions.  It just makes sure
 948     * that all the dispatch offsets for all the extensions that
 949     * *might* be enables are known.  This is needed because the
 950     * dispatch offsets need to be known when _mesa_context_create is
 951     * called, but we can't enable the extensions until we have a
 952     * context pointer.
 953     *
 954     * Hello chicken.  Hello egg.  How are you two today?
 955     */
 956
 957    driInitExtensions( NULL, card_extensions, GL_FALSE );
 958    driInitExtensions( NULL, g400_extensions, GL_FALSE );
 959    driInitExtensions(NULL, ARB_vp_extensions, GL_FALSE);
 960    driInitExtensions( NULL, NV_vp_extensions, GL_FALSE );
 961
 962    if (!mgaInitDriver(psp))
 963        return NULL;
 964
 965    return mgaFillInModes( psp,
 966                           dri_priv->cpp * 8,
 967                           (dri_priv->cpp == 2) ? 16 : 24,
 968                           (dri_priv->cpp == 2) ? 0  : 8,
 969                           (dri_priv->backOffset != dri_priv->depthOffset) );
 970 }
 971
 972
 973 /**
 974  * Get information about previous buffer swaps.
 975  */
 976 static int
 977 getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo )
 978 {
 979    mgaContextPtr  mmesa;
 980
 981    if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
 982         || (dPriv->driContextPriv->driverPrivate == NULL)
 983         || (sInfo == NULL) ) {
 984       return -1;
 985    }
 986
 987    mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 988    sInfo->swap_count = mmesa->swap_count;
 989    sInfo->swap_ust = mmesa->swap_ust;
 990    sInfo->swap_missed_count = mmesa->swap_missed_count;
 991
 992    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
 993        ? driCalculateSwapUsage( dPriv, 0, mmesa->swap_missed_ust )
 994        : 0.0;
 995
 996    return 0;
 997 }
 998
 999 const struct __DriverAPIRec driDriverAPI = {
1000    .InitScreen      = mgaInitScreen,
1001    .DestroyScreen   = mgaDestroyScreen,
1002    .CreateContext   = mgaCreateContext,
1003    .DestroyContext  = mgaDestroyContext,
1004    .CreateBuffer    = mgaCreateBuffer,
1005    .DestroyBuffer   = mgaDestroyBuffer,
1006    .SwapBuffers     = mgaSwapBuffers,
1007    .MakeCurrent     = mgaMakeCurrent,
1008    .UnbindContext   = mgaUnbindContext,
1009    .GetSwapInfo     = getSwapInfo,
1010    .GetDrawableMSC  = driDrawableGetMSC32,
1011    .WaitForMSC      = driWaitForMSC32,
1012    .WaitForSBC      = NULL,
1013    .SwapBuffersMSC  = NULL
1014 };