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 "vbo/vbo.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_buffer_object
  76 #define need_GL_ARB_vertex_program
  77 #define need_GL_EXT_fog_coord
  78 #define need_GL_EXT_multi_draw_arrays
  79 #define need_GL_EXT_secondary_color
  80 #if 0
  81 #define need_GL_EXT_paletted_texture
  82 #endif
  83 #define need_GL_NV_vertex_program
  84 #include "extension_helper.h"
  85
  86 /* MGA configuration
  87  */
  88 #include "xmlpool.h"
  89
  90 PUBLIC const char __driConfigOptions[] =
  91 DRI_CONF_BEGIN
  92     DRI_CONF_SECTION_PERFORMANCE
  93         DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_0)
  94     DRI_CONF_SECTION_END
  95     DRI_CONF_SECTION_QUALITY
  96         DRI_CONF_TEXTURE_DEPTH(DRI_CONF_TEXTURE_DEPTH_FB)
  97         DRI_CONF_COLOR_REDUCTION(DRI_CONF_COLOR_REDUCTION_DITHER)
  98     DRI_CONF_SECTION_END
  99     DRI_CONF_SECTION_SOFTWARE
 100         DRI_CONF_ARB_VERTEX_PROGRAM(true)
 101         DRI_CONF_NV_VERTEX_PROGRAM(true)
 102     DRI_CONF_SECTION_END
 103     DRI_CONF_SECTION_DEBUG
 104         DRI_CONF_NO_RAST(false)
 105     DRI_CONF_SECTION_END
 106 DRI_CONF_END;
 107 static const GLuint __driNConfigOptions = 6;
 108
 109 #ifndef MGA_DEBUG
 110 int MGA_DEBUG = 0;
 111 #endif
 112
 113 static int getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo );
 114
 115 static __GLcontextModes *
 116 mgaFillInModes( unsigned pixel_bits, unsigned depth_bits,
 117                 unsigned stencil_bits, GLboolean have_back_buffer )
 118 {
 119     __GLcontextModes * modes;
 120     __GLcontextModes * m;
 121     unsigned num_modes;
 122     unsigned depth_buffer_factor;
 123     unsigned back_buffer_factor;
 124     GLenum fb_format;
 125     GLenum fb_type;
 126
 127     /* GLX_SWAP_COPY_OML is only supported because the MGA driver doesn't
 128      * support pageflipping at all.
 129      */
 130     static const GLenum back_buffer_modes[] = {
 131         GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 132     };
 133
 134     u_int8_t depth_bits_array[3];
 135     u_int8_t stencil_bits_array[3];
 136
 137
 138     depth_bits_array[0] = 0;
 139     depth_bits_array[1] = depth_bits;
 140     depth_bits_array[2] = depth_bits;
 141
 142     /* Just like with the accumulation buffer, always provide some modes
 143      * with a stencil buffer.  It will be a sw fallback, but some apps won't
 144      * care about that.
 145      */
 146     stencil_bits_array[0] = 0;
 147     stencil_bits_array[1] = 0;
 148     stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
 149
 150     depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
 151     back_buffer_factor  = (have_back_buffer) ? 2 : 1;
 152
 153     num_modes = depth_buffer_factor * back_buffer_factor * 4;
 154
 155     if ( pixel_bits == 16 ) {
 156         fb_format = GL_RGB;
 157         fb_type = GL_UNSIGNED_SHORT_5_6_5;
 158     }
 159     else {
 160         fb_format = GL_BGR;
 161         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 162     }
 163
 164     modes = (*dri_interface->createContextModes)( num_modes, sizeof( __GLcontextModes ) );
 165     m = modes;
 166     if ( ! driFillInModes( & m, fb_format, fb_type,
 167                            depth_bits_array, stencil_bits_array, depth_buffer_factor,
 168                            back_buffer_modes, back_buffer_factor,
 169                            GLX_TRUE_COLOR ) ) {
 170         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 171                  __func__, __LINE__ );
 172         return NULL;
 173     }
 174
 175     if ( ! driFillInModes( & m, fb_format, fb_type,
 176                            depth_bits_array, stencil_bits_array, depth_buffer_factor,
 177                            back_buffer_modes, back_buffer_factor,
 178                            GLX_DIRECT_COLOR ) ) {
 179         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 180                  __func__, __LINE__ );
 181         return NULL;
 182     }
 183
 184     /* Mark the visual as slow if there are "fake" stencil bits.
 185      */
 186     for ( m = modes ; m != NULL ; m = m->next ) {
 187         if ( (m->stencilBits != 0) && (m->stencilBits != stencil_bits) ) {
 188             m->visualRating = GLX_SLOW_CONFIG;
 189         }
 190     }
 191
 192     return modes;
 193 }
 194
 195
 196 static const __DRIextension *mgaExtensions[] = {
 197     &driReadDrawableExtension,
 198     &driSwapControlExtension.base,
 199     &driFrameTrackingExtension.base,
 200     &driMediaStreamCounterExtension.base,
 201     NULL
 202 };
 203
 204 static GLboolean
 205 mgaInitDriver(__DRIscreenPrivate *sPriv)
 206 {
 207    mgaScreenPrivate *mgaScreen;
 208    MGADRIPtr         serverInfo = (MGADRIPtr)sPriv->pDevPriv;
 209
 210    if (sPriv->devPrivSize != sizeof(MGADRIRec)) {
 211       fprintf(stderr,"\nERROR!  sizeof(MGADRIRec) does not match passed size from device driver\n");
 212       return GL_FALSE;
 213    }
 214
 215    /* Allocate the private area */
 216    mgaScreen = (mgaScreenPrivate *)MALLOC(sizeof(mgaScreenPrivate));
 217    if (!mgaScreen) {
 218       __driUtilMessage("Couldn't malloc screen struct");
 219       return GL_FALSE;
 220    }
 221
 222    mgaScreen->sPriv = sPriv;
 223    sPriv->private = (void *)mgaScreen;
 224
 225    if (sPriv->drm_version.minor >= 1) {
 226       int ret;
 227       drm_mga_getparam_t gp;
 228
 229       gp.param = MGA_PARAM_IRQ_NR;
 230       gp.value = &mgaScreen->irq;
 231       mgaScreen->irq = 0;
 232
 233       ret = drmCommandWriteRead( sPriv->fd, DRM_MGA_GETPARAM,
 234                                     &gp, sizeof(gp));
 235       if (ret) {
 236             fprintf(stderr, "drmMgaGetParam (MGA_PARAM_IRQ_NR): %d\n", ret);
 237             FREE(mgaScreen);
 238             sPriv->private = NULL;
 239             return GL_FALSE;
 240       }
 241    }
 242
 243    sPriv->extensions = mgaExtensions;
 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->drm_version.minor < 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_vertex_program_stage,
 375
 376                                 /* REMOVE: point attenuation stage */
 377 #if 0
 378    &_mga_render_stage,          /* ADD: unclipped rastersetup-to-dma */
 379                                 /* Need new ioctl for wacceptseq */
 380 #endif
 381    &_tnl_render_stage,
 382    0,
 383 };
 384
 385
 386 static const struct dri_extension g400_extensions[] =
 387 {
 388    { "GL_ARB_multitexture",           NULL },
 389    { "GL_ARB_texture_env_add",        NULL },
 390    { "GL_ARB_texture_env_combine",    NULL },
 391    { "GL_ARB_texture_env_crossbar",   NULL },
 392    { "GL_EXT_texture_env_combine",    NULL },
 393    { "GL_EXT_texture_edge_clamp",     NULL },
 394    { "GL_ATI_texture_env_combine3",   NULL },
 395    { NULL,                            NULL }
 396 };
 397
 398 static const struct dri_extension card_extensions[] =
 399 {
 400    { "GL_ARB_multisample",            GL_ARB_multisample_functions },
 401    { "GL_ARB_texture_compression",    GL_ARB_texture_compression_functions },
 402    { "GL_ARB_texture_rectangle",      NULL },
 403    { "GL_ARB_vertex_buffer_object",   GL_ARB_vertex_buffer_object_functions },
 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                                  0 );
 545
 546    ctx->Const.MinLineWidth = 1.0;
 547    ctx->Const.MinLineWidthAA = 1.0;
 548    ctx->Const.MaxLineWidth = 10.0;
 549    ctx->Const.MaxLineWidthAA = 10.0;
 550    ctx->Const.LineWidthGranularity = 1.0;
 551
 552    mmesa->texture_depth = driQueryOptioni (&mmesa->optionCache,
 553                                            "texture_depth");
 554    if (mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FB)
 555       mmesa->texture_depth = ( mesaVis->rgbBits >= 24 ) ?
 556          DRI_CONF_TEXTURE_DEPTH_32 : DRI_CONF_TEXTURE_DEPTH_16;
 557    mmesa->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 558
 559    switch (mesaVis->depthBits) {
 560    case 16:
 561       mmesa->depth_scale = 1.0/(GLdouble)0xffff;
 562       mmesa->depth_clear_mask = ~0;
 563       mmesa->ClearDepth = 0xffff;
 564       break;
 565    case 24:
 566       mmesa->depth_scale = 1.0/(GLdouble)0xffffff;
 567       if (mmesa->hw_stencil) {
 568          mmesa->depth_clear_mask = 0xffffff00;
 569          mmesa->stencil_clear_mask = 0x000000ff;
 570       } else
 571          mmesa->depth_clear_mask = ~0;
 572       mmesa->ClearDepth = 0xffffff00;
 573       break;
 574    case 32:
 575       mmesa->depth_scale = 1.0/(GLdouble)0xffffffff;
 576       mmesa->depth_clear_mask = ~0;
 577       mmesa->ClearDepth = 0xffffffff;
 578       break;
 579    };
 580
 581    mmesa->haveHwStipple = GL_FALSE;
 582    mmesa->RenderIndex = -1;             /* impossible value */
 583    mmesa->dirty = ~0;
 584    mmesa->vertex_format = 0;
 585    mmesa->CurrentTexObj[0] = 0;
 586    mmesa->CurrentTexObj[1] = 0;
 587    mmesa->tmu_source[0] = 0;
 588    mmesa->tmu_source[1] = 1;
 589
 590    mmesa->texAge[0] = 0;
 591    mmesa->texAge[1] = 0;
 592
 593    /* Initialize the software rasterizer and helper modules.
 594     */
 595    _swrast_CreateContext( ctx );
 596    _vbo_CreateContext( ctx );
 597    _tnl_CreateContext( ctx );
 598
 599    _swsetup_CreateContext( ctx );
 600
 601    /* Install the customized pipeline:
 602     */
 603    _tnl_destroy_pipeline( ctx );
 604    _tnl_install_pipeline( ctx, mga_pipeline );
 605
 606    /* Configure swrast and T&L to match hardware characteristics:
 607     */
 608    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 609    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 610    _tnl_allow_pixel_fog( ctx, GL_FALSE );
 611    _tnl_allow_vertex_fog( ctx, GL_TRUE );
 612
 613    mmesa->primary_offset = mmesa->mgaScreen->primary.handle;
 614
 615    ctx->DriverCtx = (void *) mmesa;
 616    mmesa->glCtx = ctx;
 617
 618    driInitExtensions( ctx, card_extensions, GL_FALSE );
 619
 620    if (MGA_IS_G400(MGA_CONTEXT(ctx))) {
 621       driInitExtensions( ctx, g400_extensions, GL_FALSE );
 622    }
 623
 624    if ( driQueryOptionb( &mmesa->optionCache, "arb_vertex_program" ) ) {
 625       driInitSingleExtension( ctx, ARB_vp_extension );
 626    }
 627
 628    if ( driQueryOptionb( &mmesa->optionCache, "nv_vertex_program" ) ) {
 629       driInitExtensions( ctx, NV_vp_extensions, GL_FALSE );
 630    }
 631
 632
 633    /* XXX these should really go right after _mesa_init_driver_functions() */
 634    mgaDDInitStateFuncs( ctx );
 635    mgaDDInitSpanFuncs( ctx );
 636    mgaDDInitPixelFuncs( ctx );
 637    mgaDDInitTriFuncs( ctx );
 638
 639    mgaInitVB( ctx );
 640    mgaInitState( mmesa );
 641
 642    driContextPriv->driverPrivate = (void *) mmesa;
 643
 644 #if DO_DEBUG
 645    MGA_DEBUG = driParseDebugString( getenv( "MGA_DEBUG" ),
 646                                     debug_control );
 647 #endif
 648
 649    mmesa->vblank_flags = (mmesa->mgaScreen->irq == 0)
 650        ? VBLANK_FLAG_NO_IRQ : driGetDefaultVBlankFlags(&mmesa->optionCache);
 651
 652    (*dri_interface->getUST)( & mmesa->swap_ust );
 653
 654    if (driQueryOptionb(&mmesa->optionCache, "no_rast")) {
 655       fprintf(stderr, "disabling 3D acceleration\n");
 656       FALLBACK(mmesa->glCtx, MGA_FALLBACK_DISABLE, 1);
 657    }
 658
 659    return GL_TRUE;
 660 }
 661
 662 static void
 663 mgaDestroyContext(__DRIcontextPrivate *driContextPriv)
 664 {
 665    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 666
 667    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 668       fprintf( stderr, "[%s:%d] mgaDestroyContext start\n",
 669                __FILE__, __LINE__ );
 670
 671    assert(mmesa); /* should never be null */
 672    if (mmesa) {
 673       GLboolean   release_texture_heaps;
 674
 675
 676       release_texture_heaps = (mmesa->glCtx->Shared->RefCount == 1);
 677       _swsetup_DestroyContext( mmesa->glCtx );
 678       _tnl_DestroyContext( mmesa->glCtx );
 679       _vbo_DestroyContext( mmesa->glCtx );
 680       _swrast_DestroyContext( mmesa->glCtx );
 681
 682       mgaFreeVB( mmesa->glCtx );
 683
 684       /* free the Mesa context */
 685       mmesa->glCtx->DriverCtx = NULL;
 686       _mesa_destroy_context(mmesa->glCtx);
 687
 688       if ( release_texture_heaps ) {
 689          /* This share group is about to go away, free our private
 690           * texture object data.
 691           */
 692          int i;
 693
 694          for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 695             driDestroyTextureHeap( mmesa->texture_heaps[ i ] );
 696             mmesa->texture_heaps[ i ] = NULL;
 697          }
 698
 699          assert( is_empty_list( & mmesa->swapped ) );
 700       }
 701
 702       /* free the option cache */
 703       driDestroyOptionCache (&mmesa->optionCache);
 704
 705       FREE(mmesa);
 706    }
 707
 708    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 709       fprintf( stderr, "[%s:%d] mgaDestroyContext done\n",
 710                __FILE__, __LINE__ );
 711 }
 712
 713
 714 static GLboolean
 715 mgaCreateBuffer( __DRIscreenPrivate *driScrnPriv,
 716                  __DRIdrawablePrivate *driDrawPriv,
 717                  const __GLcontextModes *mesaVis,
 718                  GLboolean isPixmap )
 719 {
 720    mgaScreenPrivate *screen = (mgaScreenPrivate *) driScrnPriv->private;
 721
 722    if (isPixmap) {
 723       return GL_FALSE; /* not implemented */
 724    }
 725    else {
 726       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 727                              mesaVis->depthBits != 24);
 728
 729 #if 0
 730       driDrawPriv->driverPrivate = (void *)
 731          _mesa_create_framebuffer(mesaVis,
 732                                   GL_FALSE,  /* software depth buffer? */
 733                                   swStencil,
 734                                   mesaVis->accumRedBits > 0,
 735                                   mesaVis->alphaBits > 0 );
 736 #else
 737       struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
 738
 739       {
 740          driRenderbuffer *frontRb
 741             = driNewRenderbuffer(GL_RGBA,
 742                                  NULL,
 743                                  screen->cpp,
 744                                  screen->frontOffset, screen->frontPitch,
 745                                  driDrawPriv);
 746          mgaSetSpanFunctions(frontRb, mesaVis);
 747          _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
 748       }
 749
 750       if (mesaVis->doubleBufferMode) {
 751          driRenderbuffer *backRb
 752             = driNewRenderbuffer(GL_RGBA,
 753                                  NULL,
 754                                  screen->cpp,
 755                                  screen->backOffset, screen->backPitch,
 756                                  driDrawPriv);
 757          mgaSetSpanFunctions(backRb, mesaVis);
 758          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
 759       }
 760
 761       if (mesaVis->depthBits == 16) {
 762          driRenderbuffer *depthRb
 763             = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
 764                                  NULL,
 765                                  screen->cpp,
 766                                  screen->depthOffset, screen->depthPitch,
 767                                  driDrawPriv);
 768          mgaSetSpanFunctions(depthRb, mesaVis);
 769          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 770       }
 771       else if (mesaVis->depthBits == 24) {
 772          /* XXX is this right? */
 773          if (mesaVis->stencilBits) {
 774             driRenderbuffer *depthRb
 775                = driNewRenderbuffer(GL_DEPTH_COMPONENT24,
 776                                     NULL,
 777                                     screen->cpp,
 778                                     screen->depthOffset, screen->depthPitch,
 779                                     driDrawPriv);
 780             mgaSetSpanFunctions(depthRb, mesaVis);
 781             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 782          }
 783          else {
 784             driRenderbuffer *depthRb
 785                = driNewRenderbuffer(GL_DEPTH_COMPONENT32,
 786                                     NULL,
 787                                     screen->cpp,
 788                                     screen->depthOffset, screen->depthPitch,
 789                                     driDrawPriv);
 790             mgaSetSpanFunctions(depthRb, mesaVis);
 791             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 792          }
 793       }
 794       else if (mesaVis->depthBits == 32) {
 795          driRenderbuffer *depthRb
 796             = driNewRenderbuffer(GL_DEPTH_COMPONENT32,
 797                                  NULL,
 798                                  screen->cpp,
 799                                  screen->depthOffset, screen->depthPitch,
 800                                  driDrawPriv);
 801          mgaSetSpanFunctions(depthRb, mesaVis);
 802          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 803       }
 804
 805       if (mesaVis->stencilBits > 0 && !swStencil) {
 806          driRenderbuffer *stencilRb
 807             = driNewRenderbuffer(GL_STENCIL_INDEX8_EXT,
 808                                  NULL,
 809                                  screen->cpp,
 810                                  screen->depthOffset, screen->depthPitch,
 811                                  driDrawPriv);
 812          mgaSetSpanFunctions(stencilRb, mesaVis);
 813          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
 814       }
 815
 816       _mesa_add_soft_renderbuffers(fb,
 817                                    GL_FALSE, /* color */
 818                                    GL_FALSE, /* depth */
 819                                    swStencil,
 820                                    mesaVis->accumRedBits > 0,
 821                                    GL_FALSE, /* alpha */
 822                                    GL_FALSE /* aux */);
 823       driDrawPriv->driverPrivate = (void *) fb;
 824 #endif
 825
 826       return (driDrawPriv->driverPrivate != NULL);
 827    }
 828 }
 829
 830
 831 static void
 832 mgaDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
 833 {
 834    _mesa_unreference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)));
 835 }
 836
 837 static void
 838 mgaSwapBuffers(__DRIdrawablePrivate *dPriv)
 839 {
 840    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 841       mgaContextPtr mmesa;
 842       GLcontext *ctx;
 843       mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 844       ctx = mmesa->glCtx;
 845
 846       if (ctx->Visual.doubleBufferMode) {
 847          _mesa_notifySwapBuffers( ctx );
 848          mgaCopyBuffer( dPriv );
 849       }
 850    } else {
 851       /* XXX this shouldn't be an error but we can't handle it for now */
 852       _mesa_problem(NULL, "%s: drawable has no context!\n", __FUNCTION__);
 853    }
 854 }
 855
 856 static GLboolean
 857 mgaUnbindContext(__DRIcontextPrivate *driContextPriv)
 858 {
 859    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 860    if (mmesa)
 861       mmesa->dirty = ~0;
 862
 863    return GL_TRUE;
 864 }
 865
 866 /* This looks buggy to me - the 'b' variable isn't used anywhere...
 867  * Hmm - It seems that the drawable is already hooked in to
 868  * driDrawablePriv.
 869  *
 870  * But why are we doing context initialization here???
 871  */
 872 static GLboolean
 873 mgaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 874                __DRIdrawablePrivate *driDrawPriv,
 875                __DRIdrawablePrivate *driReadPriv)
 876 {
 877    if (driContextPriv) {
 878       mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 879
 880       if (mmesa->driDrawable != driDrawPriv) {
 881          driDrawableInitVBlank( driDrawPriv, mmesa->vblank_flags,
 882                                 &mmesa->vbl_seq );
 883          mmesa->driDrawable = driDrawPriv;
 884          mmesa->dirty = ~0;
 885          mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 886       }
 887
 888       mmesa->driReadable = driReadPriv;
 889
 890       _mesa_make_current(mmesa->glCtx,
 891                          (GLframebuffer *) driDrawPriv->driverPrivate,
 892                          (GLframebuffer *) driReadPriv->driverPrivate);
 893    }
 894    else {
 895       _mesa_make_current(NULL, NULL, NULL);
 896    }
 897
 898    return GL_TRUE;
 899 }
 900
 901
 902 void mgaGetLock( mgaContextPtr mmesa, GLuint flags )
 903 {
 904    __DRIdrawablePrivate *dPriv = mmesa->driDrawable;
 905    drm_mga_sarea_t *sarea = mmesa->sarea;
 906    int me = mmesa->hHWContext;
 907    int i;
 908
 909    drmGetLock(mmesa->driFd, mmesa->hHWContext, flags);
 910
 911    DRI_VALIDATE_DRAWABLE_INFO( mmesa->driScreen, dPriv );
 912    if (*(dPriv->pStamp) != mmesa->lastStamp) {
 913       mmesa->lastStamp = *(dPriv->pStamp);
 914       mmesa->SetupNewInputs |= VERT_BIT_POS;
 915       mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 916       mgaUpdateRects( mmesa, (MGA_FRONT|MGA_BACK) );
 917       driUpdateFramebufferSize(mmesa->glCtx, dPriv);
 918    }
 919
 920    mmesa->dirty |= MGA_UPLOAD_CONTEXT | MGA_UPLOAD_CLIPRECTS;
 921
 922    mmesa->sarea->dirty |= MGA_UPLOAD_CONTEXT;
 923
 924    if (sarea->ctxOwner != me) {
 925       mmesa->dirty |= (MGA_UPLOAD_CONTEXT | MGA_UPLOAD_TEX0 |
 926                        MGA_UPLOAD_TEX1 | MGA_UPLOAD_PIPE);
 927       sarea->ctxOwner=me;
 928    }
 929
 930    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 931       DRI_AGE_TEXTURES( mmesa->texture_heaps[ i ] );
 932    }
 933 }
 934
 935
 936 static const struct __DriverAPIRec mgaAPI = {
 937    .DestroyScreen   = mgaDestroyScreen,
 938    .CreateContext   = mgaCreateContext,
 939    .DestroyContext  = mgaDestroyContext,
 940    .CreateBuffer    = mgaCreateBuffer,
 941    .DestroyBuffer   = mgaDestroyBuffer,
 942    .SwapBuffers     = mgaSwapBuffers,
 943    .MakeCurrent     = mgaMakeCurrent,
 944    .UnbindContext   = mgaUnbindContext,
 945    .GetSwapInfo     = getSwapInfo,
 946    .GetMSC          = driGetMSC32,
 947    .WaitForMSC      = driWaitForMSC32,
 948    .WaitForSBC      = NULL,
 949    .SwapBuffersMSC  = NULL
 950 };
 951
 952
 953 /**
 954  * This is the driver specific part of the createNewScreen entry point.
 955  *
 956  * \todo maybe fold this into intelInitDriver
 957  *
 958  * \return the __GLcontextModes supported by this driver
 959  */
 960 __GLcontextModes *__driDriverInitScreen(__DRIscreenPrivate *psp)
 961 {
 962    static const __DRIversion ddx_expected = { 1, 2, 0 };
 963    static const __DRIversion dri_expected = { 4, 0, 0 };
 964    static const __DRIversion drm_expected = { 3, 0, 0 };
 965    MGADRIPtr dri_priv = (MGADRIPtr) psp->pDevPriv;
 966
 967    psp->DriverAPI = mgaAPI;
 968    if ( ! driCheckDriDdxDrmVersions2( "MGA",
 969                                       &psp->dri_version, & dri_expected,
 970                                       &psp->ddx_version, & ddx_expected,
 971                                       &psp->drm_version, & drm_expected ) )
 972       return NULL;
 973
 974
 975    /* Calling driInitExtensions here, with a NULL context pointer,
 976     * does not actually enable the extensions.  It just makes sure
 977     * that all the dispatch offsets for all the extensions that
 978     * *might* be enables are known.  This is needed because the
 979     * dispatch offsets need to be known when _mesa_context_create is
 980     * called, but we can't enable the extensions until we have a
 981     * context pointer.
 982     *
 983     * Hello chicken.  Hello egg.  How are you two today?
 984     */
 985
 986    driInitExtensions( NULL, card_extensions, GL_FALSE );
 987    driInitExtensions( NULL, g400_extensions, GL_FALSE );
 988    driInitSingleExtension( NULL, ARB_vp_extension );
 989    driInitExtensions( NULL, NV_vp_extensions, GL_FALSE );
 990
 991    if (!mgaInitDriver(psp))
 992        return NULL;
 993
 994    return mgaFillInModes( dri_priv->cpp * 8,
 995                           (dri_priv->cpp == 2) ? 16 : 24,
 996                           (dri_priv->cpp == 2) ? 0  : 8,
 997                           (dri_priv->backOffset != dri_priv->depthOffset) );
 998 }
 999
1000
1001 /**
1002  * Get information about previous buffer swaps.
1003  */
1004 static int
1005 getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo )
1006 {
1007    mgaContextPtr  mmesa;
1008
1009    if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
1010         || (dPriv->driContextPriv->driverPrivate == NULL)
1011         || (sInfo == NULL) ) {
1012       return -1;
1013    }
1014
1015    mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
1016    sInfo->swap_count = mmesa->swap_count;
1017    sInfo->swap_ust = mmesa->swap_ust;
1018    sInfo->swap_missed_count = mmesa->swap_missed_count;
1019
1020    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
1021        ? driCalculateSwapUsage( dPriv, 0, mmesa->swap_missed_ust )
1022        : 0.0;
1023
1024    return 0;
1025 }