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

   1 /* $XFree86: xc/lib/GL/mesa/src/drv/mga/mga_xmesa.c,v 1.19 2003/03/26 20:43:49 tsi Exp $ */
   2 /*
   3  * Copyright 2000-2001 VA Linux Systems, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * on the rights to use, copy, modify, merge, publish, distribute, sub
  10  * license, and/or sell copies of the Software, and to permit persons to whom
  11  * the Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  20  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file mga_xmesa.c
  28  * MGA screen and context initialization / creation code.
  29  *
  30  * \author Keith Whitwell <keith@tungstengraphics.com>
  31  */
  32
  33 #include <stdlib.h>
  34 #include <stdint.h>
  35 #include "drm.h"
  36 #include "mga_drm.h"
  37 #include "mga_xmesa.h"
  38 #include "context.h"
  39 #include "matrix.h"
  40 #include "simple_list.h"
  41 #include "imports.h"
  42 #include "framebuffer.h"
  43 #include "renderbuffer.h"
  44
  45 #include "swrast/swrast.h"
  46 #include "swrast_setup/swrast_setup.h"
  47 #include "tnl/tnl.h"
  48 #include "array_cache/acache.h"
  49
  50 #include "tnl/t_pipeline.h"
  51
  52 #include "drivers/common/driverfuncs.h"
  53
  54 #include "mgadd.h"
  55 #include "mgastate.h"
  56 #include "mgatex.h"
  57 #include "mgaspan.h"
  58 #include "mgaioctl.h"
  59 #include "mgatris.h"
  60 #include "mgavb.h"
  61 #include "mgapixel.h"
  62 #include "mga_xmesa.h"
  63 #include "mga_dri.h"
  64
  65 #include "utils.h"
  66 #include "vblank.h"
  67
  68 #include "extensions.h"
  69 #include "drirenderbuffer.h"
  70
  71 #include "GL/internal/dri_interface.h"
  72
  73 #define need_GL_ARB_multisample
  74 #define need_GL_ARB_texture_compression
  75 #define need_GL_ARB_vertex_program
  76 #define need_GL_EXT_fog_coord
  77 #define need_GL_EXT_multi_draw_arrays
  78 #define need_GL_EXT_secondary_color
  79 #if 0
  80 #define need_GL_EXT_paletted_texture
  81 #endif
  82 #define need_GL_NV_vertex_program
  83 #include "extension_helper.h"
  84
  85 /* MGA configuration
  86  */
  87 #include "xmlpool.h"
  88
  89 PUBLIC const char __driConfigOptions[] =
  90 DRI_CONF_BEGIN
  91     DRI_CONF_SECTION_PERFORMANCE
  92         DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_0)
  93     DRI_CONF_SECTION_END
  94     DRI_CONF_SECTION_QUALITY
  95         DRI_CONF_TEXTURE_DEPTH(DRI_CONF_TEXTURE_DEPTH_FB)
  96         DRI_CONF_COLOR_REDUCTION(DRI_CONF_COLOR_REDUCTION_DITHER)
  97     DRI_CONF_SECTION_END
  98     DRI_CONF_SECTION_SOFTWARE
  99         DRI_CONF_ARB_VERTEX_PROGRAM(true)
 100         DRI_CONF_NV_VERTEX_PROGRAM(true)
 101     DRI_CONF_SECTION_END
 102     DRI_CONF_SECTION_DEBUG
 103         DRI_CONF_NO_RAST(false)
 104     DRI_CONF_SECTION_END
 105 DRI_CONF_END;
 106 static const GLuint __driNConfigOptions = 6;
 107
 108 #ifndef MGA_DEBUG
 109 int MGA_DEBUG = 0;
 110 #endif
 111
 112 static int getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo );
 113
 114 static __GLcontextModes *
 115 mgaFillInModes( unsigned pixel_bits, unsigned depth_bits,
 116                 unsigned stencil_bits, GLboolean have_back_buffer )
 117 {
 118     __GLcontextModes * modes;
 119     __GLcontextModes * m;
 120     unsigned num_modes;
 121     unsigned depth_buffer_factor;
 122     unsigned back_buffer_factor;
 123     GLenum fb_format;
 124     GLenum fb_type;
 125
 126     /* GLX_SWAP_COPY_OML is only supported because the MGA driver doesn't
 127      * support pageflipping at all.
 128      */
 129     static const GLenum back_buffer_modes[] = {
 130         GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 131     };
 132
 133     u_int8_t depth_bits_array[3];
 134     u_int8_t stencil_bits_array[3];
 135
 136
 137     depth_bits_array[0] = 0;
 138     depth_bits_array[1] = depth_bits;
 139     depth_bits_array[2] = depth_bits;
 140
 141     /* Just like with the accumulation buffer, always provide some modes
 142      * with a stencil buffer.  It will be a sw fallback, but some apps won't
 143      * care about that.
 144      */
 145     stencil_bits_array[0] = 0;
 146     stencil_bits_array[1] = 0;
 147     stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
 148
 149     depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
 150     back_buffer_factor  = (have_back_buffer) ? 2 : 1;
 151
 152     num_modes = depth_buffer_factor * back_buffer_factor * 4;
 153
 154     if ( pixel_bits == 16 ) {
 155         fb_format = GL_RGB;
 156         fb_type = GL_UNSIGNED_SHORT_5_6_5;
 157     }
 158     else {
 159         fb_format = GL_BGR;
 160         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 161     }
 162
 163     modes = (*dri_interface->createContextModes)( num_modes, sizeof( __GLcontextModes ) );
 164     m = modes;
 165     if ( ! driFillInModes( & m, fb_format, fb_type,
 166                            depth_bits_array, stencil_bits_array, depth_buffer_factor,
 167                            back_buffer_modes, back_buffer_factor,
 168                            GLX_TRUE_COLOR ) ) {
 169         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 170                  __func__, __LINE__ );
 171         return NULL;
 172     }
 173
 174     if ( ! driFillInModes( & m, fb_format, fb_type,
 175                            depth_bits_array, stencil_bits_array, depth_buffer_factor,
 176                            back_buffer_modes, back_buffer_factor,
 177                            GLX_DIRECT_COLOR ) ) {
 178         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 179                  __func__, __LINE__ );
 180         return NULL;
 181     }
 182
 183     /* Mark the visual as slow if there are "fake" stencil bits.
 184      */
 185     for ( m = modes ; m != NULL ; m = m->next ) {
 186         if ( (m->stencilBits != 0) && (m->stencilBits != stencil_bits) ) {
 187             m->visualRating = GLX_SLOW_CONFIG;
 188         }
 189     }
 190
 191     return modes;
 192 }
 193
 194
 195 static GLboolean
 196 mgaInitDriver(__DRIscreenPrivate *sPriv)
 197 {
 198    mgaScreenPrivate *mgaScreen;
 199    MGADRIPtr         serverInfo = (MGADRIPtr)sPriv->pDevPriv;
 200    PFNGLXSCRENABLEEXTENSIONPROC glx_enable_extension =
 201        (PFNGLXSCRENABLEEXTENSIONPROC) (*dri_interface->getProcAddress("glxEnableExtension"));
 202    void * const psc = sPriv->psc->screenConfigs;
 203
 204    if (sPriv->devPrivSize != sizeof(MGADRIRec)) {
 205       fprintf(stderr,"\nERROR!  sizeof(MGADRIRec) does not match passed size from device driver\n");
 206       return GL_FALSE;
 207    }
 208
 209    /* Allocate the private area */
 210    mgaScreen = (mgaScreenPrivate *)MALLOC(sizeof(mgaScreenPrivate));
 211    if (!mgaScreen) {
 212       __driUtilMessage("Couldn't malloc screen struct");
 213       return GL_FALSE;
 214    }
 215
 216    mgaScreen->sPriv = sPriv;
 217    sPriv->private = (void *)mgaScreen;
 218
 219    if (sPriv->drmMinor >= 1) {
 220       int ret;
 221       drm_mga_getparam_t gp;
 222
 223       gp.param = MGA_PARAM_IRQ_NR;
 224       gp.value = &mgaScreen->irq;
 225       mgaScreen->irq = 0;
 226
 227       ret = drmCommandWriteRead( sPriv->fd, DRM_MGA_GETPARAM,
 228                                     &gp, sizeof(gp));
 229       if (ret) {
 230             fprintf(stderr, "drmMgaGetParam (MGA_PARAM_IRQ_NR): %d\n", ret);
 231             FREE(mgaScreen);
 232             sPriv->private = NULL;
 233             return GL_FALSE;
 234       }
 235    }
 236
 237    if ( glx_enable_extension != NULL ) {
 238       (*glx_enable_extension)( psc, "GLX_MESA_swap_control" );
 239       (*glx_enable_extension)( psc, "GLX_MESA_swap_frame_usage" );
 240       (*glx_enable_extension)( psc, "GLX_SGI_make_current_read" );
 241       (*glx_enable_extension)( psc, "GLX_SGI_swap_control" );
 242       (*glx_enable_extension)( psc, "GLX_SGI_video_sync" );
 243    }
 244
 245    if (serverInfo->chipset != MGA_CARD_TYPE_G200 &&
 246        serverInfo->chipset != MGA_CARD_TYPE_G400) {
 247       FREE(mgaScreen);
 248       sPriv->private = NULL;
 249       __driUtilMessage("Unrecognized chipset");
 250       return GL_FALSE;
 251    }
 252
 253
 254    mgaScreen->chipset = serverInfo->chipset;
 255    mgaScreen->cpp = serverInfo->cpp;
 256
 257    mgaScreen->agpMode = serverInfo->agpMode;
 258
 259    mgaScreen->frontPitch = serverInfo->frontPitch;
 260    mgaScreen->frontOffset = serverInfo->frontOffset;
 261    mgaScreen->backOffset = serverInfo->backOffset;
 262    mgaScreen->backPitch  =  serverInfo->backPitch;
 263    mgaScreen->depthOffset = serverInfo->depthOffset;
 264    mgaScreen->depthPitch  =  serverInfo->depthPitch;
 265
 266
 267    /* The only reason that the MMIO region needs to be accessable and the
 268     * primary DMA region base address needs to be known is so that the driver
 269     * can busy wait for certain DMA operations to complete (see
 270     * mgaWaitForFrameCompletion in mgaioctl.c).
 271     *
 272     * Starting with MGA DRM version 3.2, these are completely unneeded as
 273     * there is a new, in-kernel mechanism for handling the wait.
 274     */
 275
 276    if (mgaScreen->sPriv->drmMinor < 2) {
 277       mgaScreen->mmio.handle = serverInfo->registers.handle;
 278       mgaScreen->mmio.size = serverInfo->registers.size;
 279       if ( drmMap( sPriv->fd,
 280                    mgaScreen->mmio.handle, mgaScreen->mmio.size,
 281                    &mgaScreen->mmio.map ) < 0 ) {
 282          FREE( mgaScreen );
 283          sPriv->private = NULL;
 284          __driUtilMessage( "Couldn't map MMIO registers" );
 285          return GL_FALSE;
 286       }
 287
 288       mgaScreen->primary.handle = serverInfo->primary.handle;
 289       mgaScreen->primary.size = serverInfo->primary.size;
 290    }
 291    else {
 292       (void) memset( & mgaScreen->primary, 0, sizeof( mgaScreen->primary ) );
 293       (void) memset( & mgaScreen->mmio, 0, sizeof( mgaScreen->mmio ) );
 294    }
 295
 296    mgaScreen->textureOffset[MGA_CARD_HEAP] = serverInfo->textureOffset;
 297    mgaScreen->textureOffset[MGA_AGP_HEAP] = (serverInfo->agpTextureOffset |
 298                                              PDEA_pagpxfer_enable | 1);
 299
 300    mgaScreen->textureSize[MGA_CARD_HEAP] = serverInfo->textureSize;
 301    mgaScreen->textureSize[MGA_AGP_HEAP] = serverInfo->agpTextureSize;
 302
 303
 304    /* The texVirtual array stores the base addresses in the CPU's address
 305     * space of the texture memory pools.  The base address of the on-card
 306     * memory pool is calculated as an offset of the base of video memory.  The
 307     * AGP texture pool has to be mapped into the processes address space by
 308     * the DRM.
 309     */
 310
 311    mgaScreen->texVirtual[MGA_CARD_HEAP] = (char *)(mgaScreen->sPriv->pFB +
 312                                            serverInfo->textureOffset);
 313
 314    if ( serverInfo->agpTextureSize > 0 ) {
 315       if (drmMap(sPriv->fd, serverInfo->agpTextureOffset,
 316                  serverInfo->agpTextureSize,
 317                  (drmAddress *)&mgaScreen->texVirtual[MGA_AGP_HEAP]) != 0) {
 318          FREE(mgaScreen);
 319          sPriv->private = NULL;
 320          __driUtilMessage("Couldn't map agptexture region");
 321          return GL_FALSE;
 322       }
 323    }
 324
 325
 326    /* For calculating setupdma addresses.
 327     */
 328
 329    mgaScreen->bufs = drmMapBufs(sPriv->fd);
 330    if (!mgaScreen->bufs) {
 331       FREE(mgaScreen);
 332       sPriv->private = NULL;
 333       __driUtilMessage("Couldn't map dma buffers");
 334       return GL_FALSE;
 335    }
 336    mgaScreen->sarea_priv_offset = serverInfo->sarea_priv_offset;
 337
 338    /* parse information in __driConfigOptions */
 339    driParseOptionInfo (&mgaScreen->optionCache,
 340                        __driConfigOptions, __driNConfigOptions);
 341
 342    return GL_TRUE;
 343 }
 344
 345
 346 static void
 347 mgaDestroyScreen(__DRIscreenPrivate *sPriv)
 348 {
 349    mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *) sPriv->private;
 350
 351    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 352       fprintf(stderr, "mgaDestroyScreen\n");
 353
 354    drmUnmapBufs(mgaScreen->bufs);
 355
 356
 357    /* free all option information */
 358    driDestroyOptionInfo (&mgaScreen->optionCache);
 359
 360    FREE(mgaScreen);
 361    sPriv->private = NULL;
 362 }
 363
 364
 365 extern const struct tnl_pipeline_stage _mga_render_stage;
 366
 367 static const struct tnl_pipeline_stage *mga_pipeline[] = {
 368    &_tnl_vertex_transform_stage,
 369    &_tnl_normal_transform_stage,
 370    &_tnl_lighting_stage,
 371    &_tnl_fog_coordinate_stage,
 372    &_tnl_texgen_stage,
 373    &_tnl_texture_transform_stage,
 374    &_tnl_arb_vertex_program_stage,
 375    &_tnl_vertex_program_stage,
 376
 377                                 /* REMOVE: point attenuation stage */
 378 #if 0
 379    &_mga_render_stage,          /* ADD: unclipped rastersetup-to-dma */
 380                                 /* Need new ioctl for wacceptseq */
 381 #endif
 382    &_tnl_render_stage,
 383    0,
 384 };
 385
 386
 387 static const struct dri_extension g400_extensions[] =
 388 {
 389    { "GL_ARB_multitexture",           NULL },
 390    { "GL_ARB_texture_env_add",        NULL },
 391    { "GL_ARB_texture_env_combine",    NULL },
 392    { "GL_ARB_texture_env_crossbar",   NULL },
 393    { "GL_EXT_texture_env_combine",    NULL },
 394    { "GL_EXT_texture_edge_clamp",     NULL },
 395    { "GL_ATI_texture_env_combine3",   NULL },
 396    { NULL,                            NULL }
 397 };
 398
 399 static const struct dri_extension card_extensions[] =
 400 {
 401    { "GL_ARB_multisample",            GL_ARB_multisample_functions },
 402    { "GL_ARB_texture_compression",    GL_ARB_texture_compression_functions },
 403    { "GL_ARB_texture_rectangle",      NULL },
 404    { "GL_EXT_blend_logic_op",         NULL },
 405    { "GL_EXT_fog_coord",              GL_EXT_fog_coord_functions },
 406    { "GL_EXT_multi_draw_arrays",      GL_EXT_multi_draw_arrays_functions },
 407    /* paletted_textures currently doesn't work, but we could fix them later */
 408 #if defined( need_GL_EXT_paletted_texture )
 409    { "GL_EXT_shared_texture_palette", NULL },
 410    { "GL_EXT_paletted_texture",       GL_EXT_paletted_texture_functions },
 411 #endif
 412    { "GL_EXT_secondary_color",        GL_EXT_secondary_color_functions },
 413    { "GL_EXT_stencil_wrap",           NULL },
 414    { "GL_MESA_ycbcr_texture",         NULL },
 415    { "GL_SGIS_generate_mipmap",       NULL },
 416    { NULL,                            NULL }
 417 };
 418
 419 static const struct dri_extension ARB_vp_extension[] = {
 420    { "GL_ARB_vertex_program",         GL_ARB_vertex_program_functions },
 421    { NULL,                            NULL }
 422 };
 423
 424 static const struct dri_extension NV_vp_extensions[] = {
 425    { "GL_NV_vertex_program",          GL_NV_vertex_program_functions },
 426    { "GL_NV_vertex_program1_1",       NULL },
 427    { NULL,                            NULL }
 428 };
 429
 430 static const struct dri_debug_control debug_control[] =
 431 {
 432     { "fall",  DEBUG_VERBOSE_FALLBACK },
 433     { "tex",   DEBUG_VERBOSE_TEXTURE },
 434     { "ioctl", DEBUG_VERBOSE_IOCTL },
 435     { "verb",  DEBUG_VERBOSE_MSG },
 436     { "dri",   DEBUG_VERBOSE_DRI },
 437     { NULL,    0 }
 438 };
 439
 440
 441 static GLboolean
 442 mgaCreateContext( const __GLcontextModes *mesaVis,
 443                   __DRIcontextPrivate *driContextPriv,
 444                   void *sharedContextPrivate )
 445 {
 446    int i;
 447    unsigned   maxlevels;
 448    GLcontext *ctx, *shareCtx;
 449    mgaContextPtr mmesa;
 450    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 451    mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *)sPriv->private;
 452    drm_mga_sarea_t *saPriv = (drm_mga_sarea_t *)(((char*)sPriv->pSAREA)+
 453                                               mgaScreen->sarea_priv_offset);
 454    struct dd_function_table functions;
 455
 456    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 457       fprintf(stderr, "mgaCreateContext\n");
 458
 459    /* allocate mga context */
 460    mmesa = (mgaContextPtr) CALLOC(sizeof(mgaContext));
 461    if (!mmesa) {
 462       return GL_FALSE;
 463    }
 464
 465    /* Init default driver functions then plug in our Radeon-specific functions
 466     * (the texture functions are especially important)
 467     */
 468    _mesa_init_driver_functions( &functions );
 469    mgaInitDriverFuncs( &functions );
 470    mgaInitTextureFuncs( &functions );
 471    mgaInitIoctlFuncs( &functions );
 472
 473    /* Allocate the Mesa context */
 474    if (sharedContextPrivate)
 475       shareCtx = ((mgaContextPtr) sharedContextPrivate)->glCtx;
 476    else
 477       shareCtx = NULL;
 478    mmesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 479                                        &functions, (void *) mmesa);
 480    if (!mmesa->glCtx) {
 481       FREE(mmesa);
 482       return GL_FALSE;
 483    }
 484    driContextPriv->driverPrivate = mmesa;
 485
 486    /* Init mga state */
 487    mmesa->hHWContext = driContextPriv->hHWContext;
 488    mmesa->driFd = sPriv->fd;
 489    mmesa->driHwLock = &sPriv->pSAREA->lock;
 490
 491    mmesa->mgaScreen = mgaScreen;
 492    mmesa->driScreen = sPriv;
 493    mmesa->sarea = (void *)saPriv;
 494
 495    /* Parse configuration files */
 496    driParseConfigFiles (&mmesa->optionCache, &mgaScreen->optionCache,
 497                         sPriv->myNum, "mga");
 498
 499    (void) memset( mmesa->texture_heaps, 0, sizeof( mmesa->texture_heaps ) );
 500    make_empty_list( & mmesa->swapped );
 501
 502    mmesa->nr_heaps = mgaScreen->texVirtual[MGA_AGP_HEAP] ? 2 : 1;
 503    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 504       mmesa->texture_heaps[i] = driCreateTextureHeap( i, mmesa,
 505             mgaScreen->textureSize[i],
 506             6,
 507             MGA_NR_TEX_REGIONS,
 508             (drmTextureRegionPtr)mmesa->sarea->texList[i],
 509             &mmesa->sarea->texAge[i],
 510             &mmesa->swapped,
 511             sizeof( mgaTextureObject_t ),
 512             (destroy_texture_object_t *) mgaDestroyTexObj );
 513    }
 514
 515    /* Set the maximum texture size small enough that we can guarentee
 516     * that both texture units can bind a maximal texture and have them
 517     * on the card at once.
 518     */
 519    ctx = mmesa->glCtx;
 520    if ( mgaScreen->chipset == MGA_CARD_TYPE_G200 ) {
 521       ctx->Const.MaxTextureUnits = 1;
 522       ctx->Const.MaxTextureImageUnits = 1;
 523       ctx->Const.MaxTextureCoordUnits = 1;
 524       maxlevels = G200_TEX_MAXLEVELS;
 525
 526    }
 527    else {
 528       ctx->Const.MaxTextureUnits = 2;
 529       ctx->Const.MaxTextureImageUnits = 2;
 530       ctx->Const.MaxTextureCoordUnits = 2;
 531       maxlevels = G400_TEX_MAXLEVELS;
 532    }
 533
 534    driCalculateMaxTextureLevels( mmesa->texture_heaps,
 535                                  mmesa->nr_heaps,
 536                                  & ctx->Const,
 537                                  4,
 538                                  11, /* max 2D texture size is 2048x2048 */
 539                                  0,  /* 3D textures unsupported. */
 540                                  0,  /* cube textures unsupported. */
 541                                  11, /* max texture rect size is 2048x2048 */
 542                                  maxlevels,
 543                                  GL_FALSE );
 544
 545    ctx->Const.MinLineWidth = 1.0;
 546    ctx->Const.MinLineWidthAA = 1.0;
 547    ctx->Const.MaxLineWidth = 10.0;
 548    ctx->Const.MaxLineWidthAA = 10.0;
 549    ctx->Const.LineWidthGranularity = 1.0;
 550
 551    mmesa->texture_depth = driQueryOptioni (&mmesa->optionCache,
 552                                            "texture_depth");
 553    if (mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FB)
 554       mmesa->texture_depth = ( mesaVis->rgbBits >= 24 ) ?
 555          DRI_CONF_TEXTURE_DEPTH_32 : DRI_CONF_TEXTURE_DEPTH_16;
 556    mmesa->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 557
 558    switch (mesaVis->depthBits) {
 559    case 16:
 560       mmesa->depth_scale = 1.0/(GLdouble)0xffff;
 561       mmesa->depth_clear_mask = ~0;
 562       mmesa->ClearDepth = 0xffff;
 563       break;
 564    case 24:
 565       mmesa->depth_scale = 1.0/(GLdouble)0xffffff;
 566       if (mmesa->hw_stencil) {
 567          mmesa->depth_clear_mask = 0xffffff00;
 568          mmesa->stencil_clear_mask = 0x000000ff;
 569       } else
 570          mmesa->depth_clear_mask = ~0;
 571       mmesa->ClearDepth = 0xffffff00;
 572       break;
 573    case 32:
 574       mmesa->depth_scale = 1.0/(GLdouble)0xffffffff;
 575       mmesa->depth_clear_mask = ~0;
 576       mmesa->ClearDepth = 0xffffffff;
 577       break;
 578    };
 579
 580    mmesa->haveHwStipple = GL_FALSE;
 581    mmesa->RenderIndex = -1;             /* impossible value */
 582    mmesa->dirty = ~0;
 583    mmesa->vertex_format = 0;
 584    mmesa->CurrentTexObj[0] = 0;
 585    mmesa->CurrentTexObj[1] = 0;
 586    mmesa->tmu_source[0] = 0;
 587    mmesa->tmu_source[1] = 1;
 588
 589    mmesa->texAge[0] = 0;
 590    mmesa->texAge[1] = 0;
 591
 592    /* Initialize the software rasterizer and helper modules.
 593     */
 594    _swrast_CreateContext( ctx );
 595    _ac_CreateContext( ctx );
 596    _tnl_CreateContext( ctx );
 597
 598    _swsetup_CreateContext( ctx );
 599
 600    /* Install the customized pipeline:
 601     */
 602    _tnl_destroy_pipeline( ctx );
 603    _tnl_install_pipeline( ctx, mga_pipeline );
 604
 605    /* Configure swrast and T&L to match hardware characteristics:
 606     */
 607    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 608    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 609    _tnl_allow_pixel_fog( ctx, GL_FALSE );
 610    _tnl_allow_vertex_fog( ctx, GL_TRUE );
 611
 612    mmesa->primary_offset = mmesa->mgaScreen->primary.handle;
 613
 614    ctx->DriverCtx = (void *) mmesa;
 615    mmesa->glCtx = ctx;
 616
 617    driInitExtensions( ctx, card_extensions, GL_FALSE );
 618
 619    if (MGA_IS_G400(MGA_CONTEXT(ctx))) {
 620       driInitExtensions( ctx, g400_extensions, GL_FALSE );
 621    }
 622
 623    if ( driQueryOptionb( &mmesa->optionCache, "arb_vertex_program" ) ) {
 624       driInitSingleExtension( ctx, ARB_vp_extension );
 625    }
 626
 627    if ( driQueryOptionb( &mmesa->optionCache, "nv_vertex_program" ) ) {
 628       driInitExtensions( ctx, NV_vp_extensions, GL_FALSE );
 629    }
 630
 631
 632    /* XXX these should really go right after _mesa_init_driver_functions() */
 633    mgaDDInitStateFuncs( ctx );
 634    mgaDDInitSpanFuncs( ctx );
 635    mgaDDInitPixelFuncs( ctx );
 636    mgaDDInitTriFuncs( ctx );
 637
 638    mgaInitVB( ctx );
 639    mgaInitState( mmesa );
 640
 641    driContextPriv->driverPrivate = (void *) mmesa;
 642
 643 #if DO_DEBUG
 644    MGA_DEBUG = driParseDebugString( getenv( "MGA_DEBUG" ),
 645                                     debug_control );
 646 #endif
 647
 648    mmesa->vblank_flags = (mmesa->mgaScreen->irq == 0)
 649        ? VBLANK_FLAG_NO_IRQ : driGetDefaultVBlankFlags(&mmesa->optionCache);
 650
 651    (*dri_interface->getUST)( & mmesa->swap_ust );
 652
 653    if (driQueryOptionb(&mmesa->optionCache, "no_rast")) {
 654       fprintf(stderr, "disabling 3D acceleration\n");
 655       FALLBACK(mmesa->glCtx, MGA_FALLBACK_DISABLE, 1);
 656    }
 657
 658    return GL_TRUE;
 659 }
 660
 661 static void
 662 mgaDestroyContext(__DRIcontextPrivate *driContextPriv)
 663 {
 664    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 665
 666    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 667       fprintf( stderr, "[%s:%d] mgaDestroyContext start\n",
 668                __FILE__, __LINE__ );
 669
 670    assert(mmesa); /* should never be null */
 671    if (mmesa) {
 672       GLboolean   release_texture_heaps;
 673
 674
 675       release_texture_heaps = (mmesa->glCtx->Shared->RefCount == 1);
 676       _swsetup_DestroyContext( mmesa->glCtx );
 677       _tnl_DestroyContext( mmesa->glCtx );
 678       _ac_DestroyContext( mmesa->glCtx );
 679       _swrast_DestroyContext( mmesa->glCtx );
 680
 681       mgaFreeVB( mmesa->glCtx );
 682
 683       /* free the Mesa context */
 684       mmesa->glCtx->DriverCtx = NULL;
 685       _mesa_destroy_context(mmesa->glCtx);
 686
 687       if ( release_texture_heaps ) {
 688          /* This share group is about to go away, free our private
 689           * texture object data.
 690           */
 691          int i;
 692
 693          for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 694             driDestroyTextureHeap( mmesa->texture_heaps[ i ] );
 695             mmesa->texture_heaps[ i ] = NULL;
 696          }
 697
 698          assert( is_empty_list( & mmesa->swapped ) );
 699       }
 700
 701       /* free the option cache */
 702       driDestroyOptionCache (&mmesa->optionCache);
 703
 704       FREE(mmesa);
 705    }
 706
 707    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 708       fprintf( stderr, "[%s:%d] mgaDestroyContext done\n",
 709                __FILE__, __LINE__ );
 710 }
 711
 712
 713 static GLboolean
 714 mgaCreateBuffer( __DRIscreenPrivate *driScrnPriv,
 715                  __DRIdrawablePrivate *driDrawPriv,
 716                  const __GLcontextModes *mesaVis,
 717                  GLboolean isPixmap )
 718 {
 719    mgaScreenPrivate *screen = (mgaScreenPrivate *) driScrnPriv->private;
 720
 721    if (isPixmap) {
 722       return GL_FALSE; /* not implemented */
 723    }
 724    else {
 725       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 726                              mesaVis->depthBits != 24);
 727
 728 #if 0
 729       driDrawPriv->driverPrivate = (void *)
 730          _mesa_create_framebuffer(mesaVis,
 731                                   GL_FALSE,  /* software depth buffer? */
 732                                   swStencil,
 733                                   mesaVis->accumRedBits > 0,
 734                                   mesaVis->alphaBits > 0 );
 735 #else
 736       struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
 737
 738       {
 739          driRenderbuffer *frontRb
 740             = driNewRenderbuffer(GL_RGBA,
 741                                  NULL,
 742                                  screen->cpp,
 743                                  screen->frontOffset, screen->frontPitch,
 744                                  driDrawPriv);
 745          mgaSetSpanFunctions(frontRb, mesaVis);
 746          _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
 747       }
 748
 749       if (mesaVis->doubleBufferMode) {
 750          driRenderbuffer *backRb
 751             = driNewRenderbuffer(GL_RGBA,
 752                                  NULL,
 753                                  screen->cpp,
 754                                  screen->backOffset, screen->backPitch,
 755                                  driDrawPriv);
 756          mgaSetSpanFunctions(backRb, mesaVis);
 757          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
 758       }
 759
 760       if (mesaVis->depthBits == 16) {
 761          driRenderbuffer *depthRb
 762             = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
 763                                  NULL,
 764                                  screen->cpp,
 765                                  screen->depthOffset, screen->depthPitch,
 766                                  driDrawPriv);
 767          mgaSetSpanFunctions(depthRb, mesaVis);
 768          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 769       }
 770       else if (mesaVis->depthBits == 24) {
 771          /* XXX is this right? */
 772          if (mesaVis->stencilBits) {
 773             driRenderbuffer *depthRb
 774                = driNewRenderbuffer(GL_DEPTH_COMPONENT24,
 775                                     NULL,
 776                                     screen->cpp,
 777                                     screen->depthOffset, screen->depthPitch,
 778                                     driDrawPriv);
 779             mgaSetSpanFunctions(depthRb, mesaVis);
 780             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 781          }
 782          else {
 783             driRenderbuffer *depthRb
 784                = driNewRenderbuffer(GL_DEPTH_COMPONENT32,
 785                                     NULL,
 786                                     screen->cpp,
 787                                     screen->depthOffset, screen->depthPitch,
 788                                     driDrawPriv);
 789             mgaSetSpanFunctions(depthRb, mesaVis);
 790             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 791          }
 792       }
 793       else if (mesaVis->depthBits == 32) {
 794          driRenderbuffer *depthRb
 795             = driNewRenderbuffer(GL_DEPTH_COMPONENT32,
 796                                  NULL,
 797                                  screen->cpp,
 798                                  screen->depthOffset, screen->depthPitch,
 799                                  driDrawPriv);
 800          mgaSetSpanFunctions(depthRb, mesaVis);
 801          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 802       }
 803
 804       if (mesaVis->stencilBits > 0 && !swStencil) {
 805          driRenderbuffer *stencilRb
 806             = driNewRenderbuffer(GL_STENCIL_INDEX8_EXT,
 807                                  NULL,
 808                                  screen->cpp,
 809                                  screen->depthOffset, screen->depthPitch,
 810                                  driDrawPriv);
 811          mgaSetSpanFunctions(stencilRb, mesaVis);
 812          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
 813       }
 814
 815       _mesa_add_soft_renderbuffers(fb,
 816                                    GL_FALSE, /* color */
 817                                    GL_FALSE, /* depth */
 818                                    swStencil,
 819                                    mesaVis->accumRedBits > 0,
 820                                    GL_FALSE, /* alpha */
 821                                    GL_FALSE /* aux */);
 822       driDrawPriv->driverPrivate = (void *) fb;
 823 #endif
 824
 825       return (driDrawPriv->driverPrivate != NULL);
 826    }
 827 }
 828
 829
 830 static void
 831 mgaDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
 832 {
 833    _mesa_destroy_framebuffer((GLframebuffer *) (driDrawPriv->driverPrivate));
 834 }
 835
 836 static void
 837 mgaSwapBuffers(__DRIdrawablePrivate *dPriv)
 838 {
 839    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 840       mgaContextPtr mmesa;
 841       GLcontext *ctx;
 842       mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 843       ctx = mmesa->glCtx;
 844
 845       if (ctx->Visual.doubleBufferMode) {
 846          _mesa_notifySwapBuffers( ctx );
 847          mgaCopyBuffer( dPriv );
 848       }
 849    } else {
 850       /* XXX this shouldn't be an error but we can't handle it for now */
 851       _mesa_problem(NULL, "%s: drawable has no context!\n", __FUNCTION__);
 852    }
 853 }
 854
 855 static GLboolean
 856 mgaUnbindContext(__DRIcontextPrivate *driContextPriv)
 857 {
 858    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 859    if (mmesa)
 860       mmesa->dirty = ~0;
 861
 862    return GL_TRUE;
 863 }
 864
 865 /* This looks buggy to me - the 'b' variable isn't used anywhere...
 866  * Hmm - It seems that the drawable is already hooked in to
 867  * driDrawablePriv.
 868  *
 869  * But why are we doing context initialization here???
 870  */
 871 static GLboolean
 872 mgaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 873                __DRIdrawablePrivate *driDrawPriv,
 874                __DRIdrawablePrivate *driReadPriv)
 875 {
 876    if (driContextPriv) {
 877       mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 878
 879       if (mmesa->driDrawable != driDrawPriv) {
 880          driDrawableInitVBlank( driDrawPriv, mmesa->vblank_flags );
 881          mmesa->driDrawable = driDrawPriv;
 882          mmesa->dirty = ~0;
 883          mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 884          mmesa->mesa_drawable = driDrawPriv;
 885       }
 886
 887       mmesa->driReadable = driReadPriv;
 888
 889       _mesa_make_current(mmesa->glCtx,
 890                          (GLframebuffer *) driDrawPriv->driverPrivate,
 891                          (GLframebuffer *) driReadPriv->driverPrivate);
 892    }
 893    else {
 894       _mesa_make_current(NULL, NULL, NULL);
 895    }
 896
 897    return GL_TRUE;
 898 }
 899
 900
 901 void mgaGetLock( mgaContextPtr mmesa, GLuint flags )
 902 {
 903    __DRIdrawablePrivate *dPriv = mmesa->driDrawable;
 904    drm_mga_sarea_t *sarea = mmesa->sarea;
 905    int me = mmesa->hHWContext;
 906    int i;
 907
 908    drmGetLock(mmesa->driFd, mmesa->hHWContext, flags);
 909
 910    if (*(dPriv->pStamp) != mmesa->lastStamp) {
 911       mmesa->lastStamp = *(dPriv->pStamp);
 912       mmesa->SetupNewInputs |= VERT_BIT_POS;
 913       mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 914       mgaUpdateRects( mmesa, (MGA_FRONT|MGA_BACK) );
 915       driUpdateFramebufferSize(mmesa->glCtx, dPriv);
 916    }
 917
 918    mmesa->dirty |= MGA_UPLOAD_CONTEXT | MGA_UPLOAD_CLIPRECTS;
 919
 920     mmesa->sarea->dirty |= MGA_UPLOAD_CONTEXT;
 921
 922    if (sarea->ctxOwner != me) {
 923       mmesa->dirty |= (MGA_UPLOAD_CONTEXT | MGA_UPLOAD_TEX0 |
 924                        MGA_UPLOAD_TEX1 | MGA_UPLOAD_PIPE);
 925       sarea->ctxOwner=me;
 926    }
 927
 928    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 929       DRI_AGE_TEXTURES( mmesa->texture_heaps[ i ] );
 930    }
 931 }
 932
 933
 934 static const struct __DriverAPIRec mgaAPI = {
 935    .InitDriver      = mgaInitDriver,
 936    .DestroyScreen   = mgaDestroyScreen,
 937    .CreateContext   = mgaCreateContext,
 938    .DestroyContext  = mgaDestroyContext,
 939    .CreateBuffer    = mgaCreateBuffer,
 940    .DestroyBuffer   = mgaDestroyBuffer,
 941    .SwapBuffers     = mgaSwapBuffers,
 942    .MakeCurrent     = mgaMakeCurrent,
 943    .UnbindContext   = mgaUnbindContext,
 944    .GetSwapInfo     = getSwapInfo,
 945    .GetMSC          = driGetMSC32,
 946    .WaitForMSC      = driWaitForMSC32,
 947    .WaitForSBC      = NULL,
 948    .SwapBuffersMSC  = NULL
 949 };
 950
 951
 952 /**
 953  * This is the bootstrap function for the driver.  libGL supplies all of the
 954  * requisite information about the system, and the driver initializes itself.
 955  * This routine also fills in the linked list pointed to by \c driver_modes
 956  * with the \c __GLcontextModes that the driver can support for windows or
 957  * pbuffers.
 958  *
 959  * \return A pointer to a \c __DRIscreenPrivate on success, or \c NULL on
 960  *         failure.
 961  */
 962 PUBLIC
 963 void * __driCreateNewScreen_20050727( __DRInativeDisplay *dpy, int scrn, __DRIscreen *psc,
 964                              const __GLcontextModes * modes,
 965                              const __DRIversion * ddx_version,
 966                              const __DRIversion * dri_version,
 967                              const __DRIversion * drm_version,
 968                              const __DRIframebuffer * frame_buffer,
 969                              drmAddress pSAREA, int fd,
 970                              int internal_api_version,
 971                              const __DRIinterfaceMethods * interface,
 972                              __GLcontextModes ** driver_modes )
 973
 974 {
 975    __DRIscreenPrivate *psp;
 976    static const __DRIversion ddx_expected = { 1, 2, 0 };
 977    static const __DRIversion dri_expected = { 4, 0, 0 };
 978    static const __DRIversion drm_expected = { 3, 0, 0 };
 979
 980    dri_interface = interface;
 981
 982    if ( ! driCheckDriDdxDrmVersions2( "MGA",
 983                                       dri_version, & dri_expected,
 984                                       ddx_version, & ddx_expected,
 985                                       drm_version, & drm_expected ) ) {
 986       return NULL;
 987    }
 988
 989    psp = __driUtilCreateNewScreen(dpy, scrn, psc, NULL,
 990                                   ddx_version, dri_version, drm_version,
 991                                   frame_buffer, pSAREA, fd,
 992                                   internal_api_version, &mgaAPI);
 993    if ( psp != NULL ) {
 994       MGADRIPtr dri_priv = (MGADRIPtr) psp->pDevPriv;
 995       *driver_modes = mgaFillInModes( dri_priv->cpp * 8,
 996                                       (dri_priv->cpp == 2) ? 16 : 24,
 997                                       (dri_priv->cpp == 2) ? 0  : 8,
 998                                       (dri_priv->backOffset != dri_priv->depthOffset) );
 999
1000       /* Calling driInitExtensions here, with a NULL context pointer, does not actually
1001        * enable the extensions.  It just makes sure that all the dispatch offsets for all
1002        * the extensions that *might* be enables are known.  This is needed because the
1003        * dispatch offsets need to be known when _mesa_context_create is called, but we can't
1004        * enable the extensions until we have a context pointer.
1005        *
1006        * Hello chicken.  Hello egg.  How are you two today?
1007        */
1008       driInitExtensions( NULL, card_extensions, GL_FALSE );
1009       driInitExtensions( NULL, g400_extensions, GL_FALSE );
1010       driInitSingleExtension( NULL, ARB_vp_extension );
1011       driInitExtensions( NULL, NV_vp_extensions, GL_FALSE );
1012
1013    }
1014
1015    return (void *) psp;
1016 }
1017
1018
1019 /**
1020  * Get information about previous buffer swaps.
1021  */
1022 static int
1023 getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo )
1024 {
1025    mgaContextPtr  mmesa;
1026
1027    if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
1028         || (dPriv->driContextPriv->driverPrivate == NULL)
1029         || (sInfo == NULL) ) {
1030       return -1;
1031    }
1032
1033    mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
1034    sInfo->swap_count = mmesa->swap_count;
1035    sInfo->swap_ust = mmesa->swap_ust;
1036    sInfo->swap_missed_count = mmesa->swap_missed_count;
1037
1038    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
1039        ? driCalculateSwapUsage( dPriv, 0, mmesa->swap_missed_ust )
1040        : 0.0;
1041
1042    return 0;
1043 }