src/mesa/drivers/dri/unichrome/via_context.c

   1 /*
   2  * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2003 S3 Graphics, Inc. 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  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the 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  * VIA, S3 GRAPHICS, 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 OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file via_context.c
  27  *
  28  * \author John Sheng (presumably of either VIA Technologies or S3 Graphics)
  29  * \author Others at VIA Technologies?
  30  * \author Others at S3 Graphics?
  31  */
  32
  33 #include "glheader.h"
  34 #include "context.h"
  35 #include "matrix.h"
  36 #include "simple_list.h"
  37 #include "extensions.h"
  38
  39 #include "swrast/swrast.h"
  40 #include "swrast_setup/swrast_setup.h"
  41 #include "tnl/tnl.h"
  42 #include "array_cache/acache.h"
  43
  44 #include "tnl/t_pipeline.h"
  45
  46 #include "drivers/common/driverfuncs.h"
  47
  48 #include "via_screen.h"
  49 #include "via_dri.h"
  50
  51 #include "via_state.h"
  52 #include "via_tex.h"
  53 #include "via_span.h"
  54 #include "via_tris.h"
  55 #include "via_vb.h"
  56 #include "via_ioctl.h"
  57 #include "via_fb.h"
  58 #include "via_regs.h"
  59
  60 #include <stdio.h>
  61 #include "macros.h"
  62
  63 #define DRIVER_DATE     "20040923"
  64
  65 #include "utils.h"
  66
  67 viaContextPtr current_mesa;
  68 GLuint VIA_DEBUG = 0;
  69 GLuint DRAW_FRONT = 0;
  70 #define DMA_SIZE 2
  71 GLuint VIA_PERFORMANCE = 0;
  72 #ifdef PERFORMANCE_MEASURE
  73 GLuint busy = 0;
  74 GLuint idle = 0;
  75 hash_element hash_table[HASH_TABLE_SIZE][HASH_TABLE_DEPTH];
  76 #endif
  77 /*=* John Sheng [2003.5.31]  agp tex *=*/
  78 extern GLuint agpFullCount;
  79
  80 static GLboolean
  81 AllocateBuffer(viaContextPtr vmesa)
  82 {
  83     vmesa->front_base = vmesa->driScreen->pFB;
  84     if (vmesa->drawType == GLX_PBUFFER_BIT) {
  85         if (vmesa->front.map)
  86             via_free_front_buffer(vmesa);
  87         if (!via_alloc_front_buffer(vmesa))
  88             return GL_FALSE;
  89     }
  90
  91     if (vmesa->hasBack) {
  92         if (vmesa->back.map)
  93             via_free_back_buffer(vmesa);
  94         if (!via_alloc_back_buffer(vmesa))
  95             return GL_FALSE;
  96     }
  97
  98     if (vmesa->hasDepth || vmesa->hasStencil) {
  99         if (vmesa->depth.map)
 100             via_free_depth_buffer(vmesa);
 101         if (!via_alloc_depth_buffer(vmesa)) {
 102             via_free_depth_buffer(vmesa);
 103             return GL_FALSE;
 104         }
 105     }
 106
 107     return GL_TRUE;
 108 }
 109
 110 /**
 111  * Return various strings for \c glGetString.
 112  *
 113  * \sa glGetString
 114  */
 115 static const GLubyte *viaGetString(GLcontext *ctx, GLenum name)
 116 {
 117    static char buffer[128];
 118    unsigned   offset;
 119
 120
 121    switch (name) {
 122    case GL_VENDOR:
 123       return (GLubyte *)"VIA Technology";
 124
 125    case GL_RENDERER: {
 126       static const char * const chipset_names[] = {
 127          "UniChrome",
 128          "CastleRock (CLE266)",
 129          "UniChrome (KM400)",
 130          "UniChrome (K8M800)",
 131          "UniChrome (PM8x0/CN400)",
 132       };
 133       const viaContext * const via = VIA_CONTEXT(ctx);
 134       const unsigned id = via->viaScreen->deviceID;
 135
 136       offset = driGetRendererString( buffer,
 137                                      chipset_names[(id > VIA_PM800) ? 0 : id],
 138                                      DRIVER_DATE, 0 );
 139       return (GLubyte *)buffer;
 140    }
 141
 142    default:
 143       return NULL;
 144    }
 145 }
 146
 147
 148 /**
 149  * Calculate a width that satisfies the hardware's alignment requirements.
 150  * On the Unichrome hardware, each scanline must be aligned to a multiple of
 151  * 16 pixels.
 152  *
 153  * \param width  Minimum buffer width, in pixels.
 154  *
 155  * \returns A pixel width that meets the alignment requirements.
 156  */
 157 static __inline__ unsigned
 158 buffer_align( unsigned width )
 159 {
 160     return (width + 0x0f) & ~0x0f;
 161 }
 162
 163
 164 /**
 165  * Calculate the framebuffer parameters for all buffers (front, back, depth,
 166  * and stencil) associated with the specified context.
 167  *
 168  * \warning
 169  * This function also calls \c AllocateBuffer to actually allocate the
 170  * buffers.
 171  *
 172  * \sa AllocateBuffer
 173  */
 174 static GLboolean
 175 calculate_buffer_parameters( viaContextPtr vmesa )
 176 {
 177     const unsigned shift = vmesa->viaScreen->bitsPerPixel / 16;
 178     const unsigned extra = (vmesa->drawType == GLX_PBUFFER_BIT) ? 0 : 32;
 179     unsigned w;
 180     unsigned h;
 181
 182     if (vmesa->drawType == GLX_PBUFFER_BIT) {
 183         w = vmesa->driDrawable->w;
 184         h = vmesa->driDrawable->h;
 185     }
 186     else {
 187         w = vmesa->viaScreen->width;
 188         h = vmesa->viaScreen->height;
 189
 190         vmesa->front.offset = 0;
 191         vmesa->front.map = (char *) vmesa->driScreen->pFB;
 192     }
 193
 194     vmesa->front.pitch = buffer_align( w ) << shift;
 195     vmesa->front.size = vmesa->front.pitch * h;
 196
 197
 198     /* Allocate back-buffer */
 199
 200     vmesa->back.pitch = (buffer_align( vmesa->driDrawable->w ) << shift)
 201       + extra;
 202     vmesa->back.size = vmesa->back.pitch * vmesa->driDrawable->h;
 203
 204 #ifdef DEBUG
 205     if (VIA_DEBUG) fprintf(stderr, "viaMakeCurrent backbuffer: w = %d h = %d bpp = %d sizs = %d\n",
 206                            vmesa->back.pitch,
 207                            vmesa->driDrawable->h,
 208                            8 << shift,
 209                            vmesa->back.size);
 210 #endif
 211
 212     /* Allocate depth-buffer */
 213     if ( vmesa->hasStencil || vmesa->hasDepth ) {
 214         const unsigned dShift = (vmesa->hasStencil)
 215           ? 2 : (vmesa->depthBits / 16);
 216
 217         vmesa->depth.pitch = (buffer_align( vmesa->driDrawable->w ) << dShift)
 218           + extra;
 219         vmesa->depth.bpp = 8 << dShift;
 220         vmesa->depth.size = vmesa->depth.pitch * vmesa->driDrawable->h;
 221     }
 222     else {
 223         (void) memset( & vmesa->depth, 0, sizeof( vmesa->depth ) );
 224     }
 225
 226 #ifdef DEBUG
 227     if (VIA_DEBUG) fprintf(stderr, "viaMakeCurrent depthbuffer: w = %d h = %d bpp = %d sizs = %d\n",
 228                            vmesa->depth.pitch,
 229                            vmesa->driDrawable->h,
 230                            vmesa->depth.bpp,
 231                            vmesa->depth.size);
 232 #endif
 233
 234     /*=* John Sheng [2003.5.31] flip *=*/
 235     if( (vmesa->viaScreen->width == vmesa->driDrawable->w)
 236         && (vmesa->viaScreen->height == vmesa->driDrawable->h) ) {
 237         vmesa->doPageFlip = GL_FALSE;
 238         vmesa->currentPage = 0;
 239         vmesa->back.pitch = vmesa->front.pitch;
 240     }
 241
 242     if (!AllocateBuffer(vmesa)) {
 243         FREE(vmesa);
 244         return GL_FALSE;
 245     }
 246
 247     return GL_TRUE;
 248 }
 249
 250
 251 void viaReAllocateBuffers(GLframebuffer *drawbuffer)
 252 {
 253     GLcontext *ctx;
 254     viaContextPtr vmesa = current_mesa;
 255
 256     ctx = vmesa->glCtx;
 257     ctx->DrawBuffer->Width = drawbuffer->Width;
 258     ctx->DrawBuffer->Height = drawbuffer->Height;
 259
 260 #ifdef DEBUG
 261     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 262 #endif
 263     ctx->DrawBuffer->Accum = 0;
 264
 265     vmesa->driDrawable->w = ctx->DrawBuffer->Width;
 266     vmesa->driDrawable->h = ctx->DrawBuffer->Height;
 267
 268     LOCK_HARDWARE(vmesa);
 269     calculate_buffer_parameters( vmesa );
 270     UNLOCK_HARDWARE(vmesa);
 271
 272 #ifdef DEBUG
 273     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 274 #endif
 275 }
 276 static void viaBufferSize(GLframebuffer *buffer, GLuint *width, GLuint *height)
 277
 278 {
 279     /* MESA5.0 */
 280     viaContextPtr vmesa = current_mesa;
 281     *width = vmesa->driDrawable->w;
 282     *height = vmesa->driDrawable->h;
 283 }
 284
 285 /* Extension strings exported by the Unichrome driver.
 286  */
 287 static const char * const card_extensions[] =
 288 {
 289    "GL_ARB_multitexture",
 290    "GL_ARB_point_parameters",
 291    "GL_ARB_texture_env_add",
 292    "GL_ARB_texture_env_combine",
 293    "GL_ARB_texture_env_dot3",
 294    "GL_ARB_texture_mirrored_repeat",
 295    "GL_EXT_stencil_wrap",
 296    "GL_EXT_texture_env_combine",
 297    "GL_EXT_texture_env_dot3",
 298    "GL_EXT_texture_lod_bias",
 299    "GL_NV_blend_square",
 300    NULL
 301 };
 302
 303 extern const struct tnl_pipeline_stage _via_fastrender_stage;
 304 extern const struct tnl_pipeline_stage _via_render_stage;
 305
 306 static const struct tnl_pipeline_stage *via_pipeline[] = {
 307     &_tnl_vertex_transform_stage,
 308     &_tnl_normal_transform_stage,
 309     &_tnl_lighting_stage,
 310     &_tnl_fog_coordinate_stage,
 311     &_tnl_texgen_stage,
 312     &_tnl_texture_transform_stage,
 313     /* REMOVE: point attenuation stage */
 314 #if 1
 315     &_via_fastrender_stage,     /* ADD: unclipped rastersetup-to-dma */
 316     &_via_render_stage,         /* ADD: modification from _tnl_render_stage */
 317 #endif
 318     &_tnl_render_stage,
 319     0,
 320 };
 321
 322
 323 static GLboolean
 324 AllocateDmaBuffer(const GLvisual *visual, viaContextPtr vmesa)
 325 {
 326 #ifdef DEBUG
 327     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 328 #endif
 329     if (vmesa->dma[0].map && vmesa->dma[1].map)
 330         via_free_dma_buffer(vmesa);
 331
 332     if (!via_alloc_dma_buffer(vmesa)) {
 333         if (vmesa->front.map)
 334             via_free_front_buffer(vmesa);
 335         if (vmesa->back.map)
 336             via_free_back_buffer(vmesa);
 337         if (vmesa->depth.map)
 338             via_free_depth_buffer(vmesa);
 339
 340         return GL_FALSE;
 341     }
 342 #ifdef DEBUG
 343     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 344 #endif
 345     return GL_TRUE;
 346 }
 347
 348 static void
 349 InitVertexBuffer(viaContextPtr vmesa)
 350 {
 351     GLuint *addr;
 352
 353     addr = (GLuint *)vmesa->dma[0].map;
 354     *addr = 0xF210F110;
 355     *addr = (HC_ParaType_NotTex << 16);
 356     *addr = 0xcccccccc;
 357     *addr = 0xdddddddd;
 358
 359     addr = (GLuint *)vmesa->dma[1].map;
 360     *addr = 0xF210F110;
 361     *addr = (HC_ParaType_NotTex << 16);
 362     *addr = 0xcccccccc;
 363     *addr = 0xdddddddd;
 364
 365     vmesa->dmaIndex = 0;
 366     vmesa->dmaLow = DMA_OFFSET;
 367     vmesa->dmaHigh = vmesa->dma[0].size;
 368     vmesa->dmaAddr = (unsigned char *)vmesa->dma[0].map;
 369     vmesa->dmaLastPrim = vmesa->dmaLow;
 370 }
 371
 372 static void
 373 FreeBuffer(viaContextPtr vmesa)
 374 {
 375     if (vmesa->front.map)
 376         via_free_front_buffer(vmesa);
 377
 378     if (vmesa->back.map)
 379         via_free_back_buffer(vmesa);
 380
 381     if (vmesa->depth.map)
 382         via_free_depth_buffer(vmesa);
 383
 384     if (vmesa->dma[0].map && vmesa->dma[1].map)
 385         via_free_dma_buffer(vmesa);
 386 }
 387
 388 GLboolean
 389 viaCreateContext(const __GLcontextModes *mesaVis,
 390                  __DRIcontextPrivate *driContextPriv,
 391                  void *sharedContextPrivate)
 392 {
 393     GLcontext *ctx, *shareCtx;
 394     viaContextPtr vmesa;
 395     __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 396     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 397     drm_via_sarea_t *saPriv = (drm_via_sarea_t *)
 398         (((GLubyte *)sPriv->pSAREA) + viaScreen->sareaPrivOffset);
 399     struct dd_function_table functions;
 400
 401     /* Allocate via context */
 402     vmesa = (viaContextPtr) CALLOC_STRUCT(via_context_t);
 403     if (!vmesa) {
 404         return GL_FALSE;
 405     }
 406 #ifdef DEBUG
 407     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 408 #endif
 409     current_mesa = vmesa;
 410     /* pick back buffer */
 411     if (mesaVis->doubleBufferMode) {
 412         vmesa->hasBack = GL_TRUE;
 413     }
 414     else {
 415         vmesa->hasBack = GL_FALSE;
 416     }
 417     /* pick z buffer */
 418     if (mesaVis->haveDepthBuffer) {
 419         vmesa->hasDepth = GL_TRUE;
 420         vmesa->depthBits = mesaVis->depthBits;
 421     }
 422     else {
 423         vmesa->hasDepth = GL_FALSE;
 424         vmesa->depthBits = 0;
 425     }
 426     /* pick stencil buffer */
 427     if (mesaVis->haveStencilBuffer) {
 428         vmesa->hasStencil = GL_TRUE;
 429         vmesa->stencilBits = mesaVis->stencilBits;
 430     }
 431     else {
 432         vmesa->hasStencil = GL_FALSE;
 433         vmesa->stencilBits = 0;
 434     }
 435
 436     _mesa_init_driver_functions(&functions);
 437     viaInitTextureFuncs(&functions);
 438
 439     /* Allocate the Mesa context */
 440     if (sharedContextPrivate)
 441         shareCtx = ((viaContextPtr) sharedContextPrivate)->glCtx;
 442     else
 443         shareCtx = NULL;
 444
 445     vmesa->glCtx = _mesa_create_context(mesaVis, shareCtx, &functions, (void*) vmesa);
 446
 447     vmesa->shareCtx = shareCtx;
 448
 449     if (!vmesa->glCtx) {
 450         FREE(vmesa);
 451         return GL_FALSE;
 452     }
 453     driContextPriv->driverPrivate = vmesa;
 454
 455     ctx = vmesa->glCtx;
 456
 457     /* check */
 458     /*=* John Sheng [2003.7.2] for visual config number can't excess 8 *=*/
 459     /*if (viaScreen->textureSize < 2 * 1024 * 1024) {
 460         ctx->Const.MaxTextureLevels = 9;
 461     }
 462     else if (viaScreen->textureSize < 8 * 1024 * 1024) {
 463         ctx->Const.MaxTextureLevels = 10;
 464     }
 465     else {
 466         ctx->Const.MaxTextureLevels = 11;
 467     }*/
 468     ctx->Const.MaxTextureLevels = 11;
 469
 470     ctx->Const.MaxTextureUnits = 2;
 471     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 472     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 473
 474     ctx->Const.MinLineWidth = 1.0;
 475     ctx->Const.MinLineWidthAA = 1.0;
 476     ctx->Const.MaxLineWidth = 3.0;
 477     ctx->Const.MaxLineWidthAA = 3.0;
 478     ctx->Const.LineWidthGranularity = 1.0;
 479
 480     ctx->Const.MinPointSize = 1.0;
 481     ctx->Const.MinPointSizeAA = 1.0;
 482     ctx->Const.MaxPointSize = 3.0;
 483     ctx->Const.MaxPointSizeAA = 3.0;
 484     ctx->Const.PointSizeGranularity = 1.0;
 485
 486     ctx->Driver.GetBufferSize = viaBufferSize;
 487 /*    ctx->Driver.ResizeBuffers = _swrast_alloc_buffers;  *//* FIXME ?? */
 488     ctx->Driver.GetString = viaGetString;
 489
 490     ctx->DriverCtx = (void *)vmesa;
 491     vmesa->glCtx = ctx;
 492
 493     /* Initialize the software rasterizer and helper modules.
 494      */
 495     _swrast_CreateContext(ctx);
 496     _ac_CreateContext(ctx);
 497     _tnl_CreateContext(ctx);
 498     _swsetup_CreateContext(ctx);
 499
 500     /* Install the customized pipeline:
 501      */
 502     _tnl_destroy_pipeline(ctx);
 503     _tnl_install_pipeline(ctx, via_pipeline);
 504
 505     /* Configure swrast and T&L to match hardware characteristics:
 506      */
 507     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 508     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 509     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 510     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 511
 512 /*     vmesa->display = dpy; */
 513     vmesa->display = sPriv->display;
 514
 515     vmesa->hHWContext = driContextPriv->hHWContext;
 516     vmesa->driFd = sPriv->fd;
 517     vmesa->driHwLock = &sPriv->pSAREA->lock;
 518
 519     vmesa->viaScreen = viaScreen;
 520     vmesa->driScreen = sPriv;
 521     vmesa->sarea = saPriv;
 522     vmesa->glBuffer = NULL;
 523
 524     vmesa->texHeap = mmInit(0, viaScreen->textureSize);
 525     vmesa->stippleInHw = 1;
 526     vmesa->renderIndex = ~0;
 527     vmesa->dirty = VIA_UPLOAD_ALL;
 528     vmesa->uploadCliprects = GL_TRUE;
 529     vmesa->needUploadAllState = 1;
 530
 531     make_empty_list(&vmesa->TexObjList);
 532     make_empty_list(&vmesa->SwappedOut);
 533
 534     vmesa->CurrentTexObj[0] = 0;
 535     vmesa->CurrentTexObj[1] = 0;
 536
 537     vmesa->dma[0].size = DMA_SIZE * 1024 * 1024;
 538     vmesa->dma[1].size = DMA_SIZE * 1024 * 1024;
 539
 540     _math_matrix_ctr(&vmesa->ViewportMatrix);
 541
 542    driInitExtensions( ctx, card_extensions, GL_TRUE );
 543     viaInitStateFuncs(ctx);
 544     viaInitTextures(ctx);
 545     viaInitTriFuncs(ctx);
 546     viaInitSpanFuncs(ctx);
 547     viaInitIoctlFuncs(ctx);
 548     viaInitVB(ctx);
 549     viaInitState(ctx);
 550
 551     if (getenv("VIA_DEBUG"))
 552         VIA_DEBUG = 1;
 553     else
 554         VIA_DEBUG = 0;
 555
 556     if (getenv("DRAW_FRONT"))
 557         DRAW_FRONT = 1;
 558     else
 559         DRAW_FRONT = 0;
 560
 561 #ifdef PERFORMANCE_MEASURE
 562     if (getenv("VIA_PERFORMANCE"))
 563         VIA_PERFORMANCE = 1;
 564     else
 565         VIA_PERFORMANCE = 0;
 566
 567     {
 568         int i, j;
 569         for (i = 0; i < HASH_TABLE_SIZE; i++) {
 570             for (j = 0; j < HASH_TABLE_DEPTH; j ++) {
 571                 hash_table[i][j].count = 0;
 572                 sprintf(hash_table[i][j].func, "%s", "NULL");
 573             }
 574         }
 575     }
 576 #endif
 577
 578     if (!AllocateDmaBuffer(mesaVis, vmesa)) {
 579         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 580         FREE(vmesa);
 581         return GL_FALSE;
 582     }
 583
 584     InitVertexBuffer(vmesa);
 585
 586     vmesa->regMMIOBase = (GLuint *)((GLuint)viaScreen->reg);
 587     vmesa->pnGEMode = (GLuint *)((GLuint)viaScreen->reg + 0x4);
 588     vmesa->regEngineStatus = (GLuint *)((GLuint)viaScreen->reg + 0x400);
 589     vmesa->regTranSet = (GLuint *)((GLuint)viaScreen->reg + 0x43C);
 590     vmesa->regTranSpace = (GLuint *)((GLuint)viaScreen->reg + 0x440);
 591     vmesa->agpBase = viaScreen->agpBase;
 592 #ifdef DEBUG
 593     if (VIA_DEBUG) {
 594         fprintf(stderr, "regEngineStatus = %x\n", *vmesa->regEngineStatus);
 595     }
 596
 597     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 598 #endif
 599     {
 600 #ifndef USE_XINERAMA
 601         vmesa->saam = 0;
 602 #else
 603         GLboolean saam = XineramaIsActive(vmesa->display);
 604         int count = 0, fbSize;
 605
 606         if (saam && vmesa->viaScreen->drixinerama) {
 607             vmesa->xsi = XineramaQueryScreens(vmesa->display, &count);
 608             /* Test RightOf or Down */
 609             if (vmesa->xsi[0].x_org == 0 && vmesa->xsi[0].y_org == 0) {
 610                 if (vmesa->xsi[1].x_org == vmesa->xsi[1].width) {
 611                     vmesa->saam = RightOf;
 612                 }
 613                 else {
 614                     vmesa->saam = Down;
 615                 }
 616             }
 617             /* Test LeftOf or Up */
 618             else if (vmesa->xsi[0].x_org == vmesa->xsi[0].width) {
 619                 vmesa->saam = LeftOf;
 620             }
 621             else if (vmesa->xsi[0].y_org == vmesa->xsi[0].height) {
 622                 vmesa->saam = Up;
 623             }
 624             else
 625                 vmesa->saam = 0;
 626
 627
 628             fbSize = vmesa->viaScreen->fbSize;
 629         }
 630         else
 631             vmesa->saam = 0;
 632 #endif
 633     }
 634
 635     vmesa->pSaamRects = (drm_clip_rect_t *) malloc(sizeof(drm_clip_rect_t));
 636     return GL_TRUE;
 637 }
 638
 639 void
 640 viaDestroyContext(__DRIcontextPrivate *driContextPriv)
 641 {
 642     viaContextPtr vmesa = (viaContextPtr)driContextPriv->driverPrivate;
 643     /*=* John Sheng [2003.12.9] Tuxracer & VQ *=*/
 644     __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 645     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 646 #ifdef DEBUG
 647     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 648 #endif
 649     assert(vmesa); /* should never be null */
 650     viaFlushPrimsLocked(vmesa);
 651     WAIT_IDLE
 652     /*=* John Sheng [2003.12.9] Tuxracer & VQ *=*/
 653     /* Enable VQ */
 654     if (viaScreen->VQEnable) {
 655         *vmesa->regTranSet = 0x00fe0000;
 656         *vmesa->regTranSet = 0x00fe0000;
 657         *vmesa->regTranSpace = 0x00000006;
 658         *vmesa->regTranSpace = 0x40008c0f;
 659         *vmesa->regTranSpace = 0x44000000;
 660         *vmesa->regTranSpace = 0x45080c04;
 661         *vmesa->regTranSpace = 0x46800408;
 662     }
 663     if (vmesa) {
 664         /*=* John Sheng [2003.5.31] flip *=*/
 665         if(vmesa->doPageFlip) {
 666             *((volatile GLuint *)((GLuint)vmesa->regMMIOBase + 0x43c)) = 0x00fe0000;
 667             *((volatile GLuint *)((GLuint)vmesa->regMMIOBase + 0x440)) = 0x00001004;
 668             WAIT_IDLE
 669             *((volatile GLuint *)((GLuint)vmesa->regMMIOBase + 0x214)) = 0;
 670         }
 671         /*=* John Sheng [2003.5.31]  agp tex *=*/
 672         if(VIA_DEBUG) fprintf(stderr, "agpFullCount = %d\n", agpFullCount);
 673
 674         _swsetup_DestroyContext(vmesa->glCtx);
 675         _tnl_DestroyContext(vmesa->glCtx);
 676         _ac_DestroyContext(vmesa->glCtx);
 677         _swrast_DestroyContext(vmesa->glCtx);
 678         viaFreeVB(vmesa->glCtx);
 679         FreeBuffer(vmesa);
 680         /* free the Mesa context */
 681         _mesa_destroy_context(vmesa->glCtx);
 682         vmesa->glCtx->DriverCtx = NULL;
 683         FREE(vmesa);
 684     }
 685
 686     P_M_R;
 687
 688 #ifdef PERFORMANCE_MEASURE
 689     if (VIA_PERFORMANCE) fprintf(stderr, "idle = %d\n", idle);
 690     if (VIA_PERFORMANCE) fprintf(stderr, "busy = %d\n", busy);
 691 #endif
 692 #ifdef DEBUG
 693     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 694 #endif
 695 }
 696
 697 void viaXMesaSetFrontClipRects(viaContextPtr vmesa)
 698 {
 699     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 700
 701     vmesa->numClipRects = dPriv->numClipRects;
 702     vmesa->pClipRects = dPriv->pClipRects;
 703     vmesa->drawX = dPriv->x;
 704     vmesa->drawY = dPriv->y;
 705     vmesa->drawW = dPriv->w;
 706     vmesa->drawH = dPriv->h;
 707
 708     viaEmitDrawingRectangle(vmesa);
 709     vmesa->uploadCliprects = GL_TRUE;
 710 }
 711
 712 void viaXMesaSetBackClipRects(viaContextPtr vmesa)
 713 {
 714     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 715     /*=* John Sheng [2003.6.9] fix glxgears dirty screen */
 716     /*if (vmesa->saam) {*/
 717             vmesa->numClipRects = dPriv->numClipRects;
 718             vmesa->pClipRects = dPriv->pClipRects;
 719             vmesa->drawX = dPriv->x;
 720             vmesa->drawY = dPriv->y;
 721             vmesa->drawW = dPriv->w;
 722             vmesa->drawH = dPriv->h;
 723     /*}
 724     else {
 725         if (dPriv->numBackClipRects == 0) {
 726             vmesa->numClipRects = dPriv->numClipRects;
 727             vmesa->pClipRects = dPriv->pClipRects;
 728             vmesa->drawX = dPriv->x;
 729             vmesa->drawY = dPriv->y;
 730             vmesa->drawW = dPriv->w;
 731             vmesa->drawH = dPriv->h;
 732         }
 733         else {
 734             vmesa->numClipRects = dPriv->numBackClipRects;
 735             vmesa->pClipRects = dPriv->pBackClipRects;
 736             vmesa->drawX = dPriv->backX;
 737             vmesa->drawY = dPriv->backY;
 738             vmesa->drawW = dPriv->w;
 739             vmesa->drawH = dPriv->h;
 740         }
 741     }*/
 742     viaEmitDrawingRectangle(vmesa);
 743     vmesa->uploadCliprects = GL_TRUE;
 744 }
 745
 746 void viaXMesaWindowMoved(viaContextPtr vmesa)
 747 {
 748     GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 749 #ifdef USE_XINERAMA
 750     GLuint side = 0;
 751     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 752 #endif
 753
 754     switch (vmesa->glCtx->Color._DrawDestMask[0]) {
 755     case __GL_FRONT_BUFFER_MASK:
 756         viaXMesaSetFrontClipRects(vmesa);
 757         break;
 758     case __GL_BACK_BUFFER_MASK:
 759         viaXMesaSetBackClipRects(vmesa);
 760         break;
 761     default:
 762         break;
 763     }
 764
 765 #ifndef USE_XINERAMA
 766     vmesa->viaScreen->fbOffset = 0;
 767     vmesa->saam &= ~S1;
 768     vmesa->saam |= S0;
 769 #else
 770     side = vmesa->saam & P_MASK;
 771
 772     switch (side) {
 773         case RightOf:
 774             /* full in screen 1 */
 775             if (vmesa->drawX >= vmesa->xsi[0].width) {
 776                 vmesa->viaScreen->fbOffset = vmesa->viaScreen->fbSize;
 777                 vmesa->drawX = vmesa->drawX - vmesa->xsi[1].width;
 778                 vmesa->numClipRects = dPriv->numBackClipRects;
 779                 vmesa->pClipRects = dPriv->pBackClipRects;
 780                 vmesa->drawX = dPriv->backX;
 781                 vmesa->drawY = dPriv->backY;
 782                 vmesa->saam &= ~S0;
 783                 vmesa->saam |= S1;
 784             }
 785             /* full in screen 0 */
 786             else if ((vmesa->drawX + vmesa->drawW) <= vmesa->xsi[0].width) {
 787                 vmesa->viaScreen->fbOffset = 0;
 788                 vmesa->saam &= ~S1;
 789                 vmesa->saam |= S0;
 790             }
 791             /* between screen 0 && screen 1 */
 792             else {
 793                 vmesa->numSaamRects = dPriv->numBackClipRects;
 794                 vmesa->pSaamRects = dPriv->pBackClipRects;
 795                 vmesa->drawXSaam = dPriv->backX;
 796                 vmesa->drawYSaam = dPriv->backY;
 797                 vmesa->viaScreen->fbOffset = 0;
 798                 vmesa->saam |= S0;
 799                 vmesa->saam |= S1;
 800             }
 801             break;
 802         case LeftOf:
 803             /* full in screen 1 */
 804             if (vmesa->drawX + vmesa->drawW <= 0) {
 805                 vmesa->viaScreen->fbOffset = vmesa->viaScreen->fbSize;
 806                 vmesa->drawX = vmesa->drawX + vmesa->xsi[1].width;
 807                 vmesa->numClipRects = dPriv->numBackClipRects;
 808                 vmesa->pClipRects = dPriv->pBackClipRects;
 809                 vmesa->drawX = dPriv->backX;
 810                 vmesa->drawY = dPriv->backY;
 811                 vmesa->saam &= ~S0;
 812                 vmesa->saam |= S1;
 813             }
 814             /* full in screen 0 */
 815             else if (vmesa->drawX >= 0) {
 816                 vmesa->viaScreen->fbOffset = 0;
 817                 vmesa->saam &= ~S1;
 818                 vmesa->saam |= S0;
 819             }
 820             /* between screen 0 && screen 1 */
 821             else {
 822                 vmesa->numSaamRects = dPriv->numBackClipRects;
 823                 vmesa->pSaamRects = dPriv->pBackClipRects;
 824                 vmesa->drawXSaam = dPriv->backX;
 825                 vmesa->drawYSaam = dPriv->backY;
 826                 vmesa->viaScreen->fbOffset = 0;
 827                 vmesa->saam |= S0;
 828                 vmesa->saam |= S1;
 829             }
 830             break;
 831         case Down :
 832             /* full in screen 1 */
 833             if (vmesa->drawY >= vmesa->xsi[0].height) {
 834                 vmesa->viaScreen->fbOffset = vmesa->viaScreen->fbSize;
 835                 vmesa->drawY = vmesa->drawY - vmesa->xsi[1].height;
 836                 vmesa->numClipRects = dPriv->numBackClipRects;
 837                 vmesa->pClipRects = dPriv->pBackClipRects;
 838                 vmesa->drawX = dPriv->backX;
 839                 vmesa->drawY = dPriv->backY;
 840                 vmesa->saam &= ~S0;
 841                 vmesa->saam |= S1;
 842             }
 843             /* full in screen 0 */
 844             else if ((vmesa->drawY + vmesa->drawH) <= vmesa->xsi[0].height) {
 845                 vmesa->viaScreen->fbOffset = 0;
 846                 vmesa->saam &= ~S1;
 847                 vmesa->saam |= S0;
 848             }
 849             /* between screen 0 && screen 1 */
 850             else {
 851                 vmesa->numSaamRects = dPriv->numBackClipRects;
 852                 vmesa->pSaamRects = dPriv->pBackClipRects;
 853                 vmesa->drawXSaam = dPriv->backX;
 854                 vmesa->drawYSaam = dPriv->backY;
 855                 vmesa->viaScreen->fbOffset = 0;
 856                 vmesa->saam |= S0;
 857                 vmesa->saam |= S1;
 858             }
 859             break;
 860         case Up :
 861             /* full in screen 1 */
 862             if ((vmesa->drawY + vmesa->drawH) <= 0) {
 863                 vmesa->viaScreen->fbOffset = vmesa->viaScreen->fbSize;
 864                 vmesa->drawY = vmesa->drawY + vmesa->xsi[1].height;
 865                 vmesa->numClipRects = dPriv->numBackClipRects;
 866                 vmesa->pClipRects = dPriv->pBackClipRects;
 867                 vmesa->drawX = dPriv->backX;
 868                 vmesa->drawY = dPriv->backY;
 869                 vmesa->saam &= ~S0;
 870                 vmesa->saam |= S1;
 871             }
 872             /* full in screen 0 */
 873             else if (vmesa->drawY >= 0) {
 874                 vmesa->viaScreen->fbOffset = 0;
 875                 vmesa->saam &= ~S1;
 876                 vmesa->saam |= S0;
 877             }
 878             /* between screen 0 && screen 1 */
 879             else {
 880                 vmesa->numSaamRects = dPriv->numBackClipRects;
 881                 vmesa->pSaamRects = dPriv->pBackClipRects;
 882                 vmesa->drawXSaam = dPriv->backX;
 883                 vmesa->drawYSaam = dPriv->backY;
 884                 vmesa->viaScreen->fbOffset = 0;
 885                 vmesa->saam |= S0;
 886                 vmesa->saam |= S1;
 887             }
 888             break;
 889         default:
 890             vmesa->viaScreen->fbOffset = 0;
 891     }
 892 #endif
 893
 894     {
 895         GLuint pitch, offset;
 896         pitch = vmesa->front.pitch;
 897         offset = vmesa->viaScreen->fbOffset + (vmesa->drawY * pitch + vmesa->drawX * bytePerPixel);
 898         vmesa->drawXoff = (GLuint)((offset & 0x1f) / bytePerPixel);
 899         if (vmesa->saam) {
 900             if (vmesa->pSaamRects) {
 901                 offset = vmesa->viaScreen->fbOffset + (vmesa->pSaamRects[0].y1 * pitch +
 902                     vmesa->pSaamRects[0].x1 * bytePerPixel);
 903                 vmesa->drawXoffSaam = (GLuint)((offset & 0x1f) / bytePerPixel);
 904             }
 905             else
 906                 vmesa->drawXoffSaam = 0;
 907         }
 908         else
 909             vmesa->drawXoffSaam = 0;
 910     }
 911
 912     vmesa->glCtx->Driver.Viewport(vmesa->glCtx,0 ,0 ,0 ,0);
 913 }
 914
 915 GLboolean
 916 viaUnbindContext(__DRIcontextPrivate *driContextPriv)
 917 {
 918 #ifdef DEBUG
 919     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 920     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 921 #endif
 922     return GL_TRUE;
 923 }
 924
 925 GLboolean
 926 viaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 927                __DRIdrawablePrivate *driDrawPriv,
 928                __DRIdrawablePrivate *driReadPriv)
 929 {
 930 #ifdef DEBUG
 931     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 932
 933     if (VIA_DEBUG) {
 934         fprintf(stderr, "driContextPriv = %08x\n", (GLuint)driContextPriv);
 935         fprintf(stderr, "driContextPriv = %08x\n", (GLuint)driDrawPriv);
 936         fprintf(stderr, "driContextPriv = %08x\n", (GLuint)driReadPriv);
 937     }
 938 #endif
 939
 940     if (driContextPriv) {
 941         viaContextPtr vmesa = (viaContextPtr)driContextPriv->driverPrivate;
 942
 943         current_mesa = vmesa;
 944
 945 #ifdef DEBUG
 946         if (VIA_DEBUG) fprintf(stderr, "viaScreen->bitsPerPixel = %d\n", viaScreen->bitsPerPixel);
 947         if (VIA_DEBUG) fprintf(stderr, "viaMakeCurrent: w = %d\n", vmesa->driDrawable->w);
 948 #endif
 949
 950         vmesa->driDrawable = driDrawPriv;
 951         if ( ! calculate_buffer_parameters( vmesa ) ) {
 952             return GL_FALSE;
 953         }
 954
 955         _mesa_make_current2(vmesa->glCtx,
 956                             (GLframebuffer *)driDrawPriv->driverPrivate,
 957                             (GLframebuffer *)driReadPriv->driverPrivate);
 958 #ifdef DEBUG
 959         if (VIA_DEBUG) fprintf(stderr, "Context %d MakeCurrent\n", vmesa->hHWContext);
 960 #endif
 961         viaXMesaWindowMoved(vmesa);
 962         if (!vmesa->glCtx->Viewport.Width)
 963             _mesa_set_viewport(vmesa->glCtx, 0, 0,
 964                                driDrawPriv->w, driDrawPriv->h);
 965     }
 966     else {
 967         _mesa_make_current(0,0);
 968     }
 969
 970 #ifdef DEBUG
 971     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 972 #endif
 973     return GL_TRUE;
 974 }
 975
 976 void viaGetLock(viaContextPtr vmesa, GLuint flags)
 977 {
 978     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 979     __DRIscreenPrivate *sPriv = vmesa->driScreen;
 980     drm_via_sarea_t *sarea = vmesa->sarea;
 981     int me = vmesa->hHWContext;
 982     __DRIdrawablePrivate *pdp;
 983     __DRIscreenPrivate *psp;
 984     pdp = dPriv;
 985     psp = sPriv;
 986 #ifdef DEBUG
 987     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 988     if (VIA_DEBUG) fprintf(stderr, "drmGetLock - in\n");
 989 #endif
 990     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 991
 992     do {
 993             DRM_UNLOCK(psp->fd, &psp->pSAREA->lock,
 994                    pdp->driContextPriv->hHWContext);
 995             DRM_SPINLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID);
 996             __driUtilUpdateDrawableInfo(dPriv);
 997             DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID);
 998             DRM_LIGHT_LOCK(psp->fd, &psp->pSAREA->lock,
 999                        pdp->driContextPriv->hHWContext);
1000     } while (0);
1001
1002     if (sarea->ctxOwner != me) {
1003         vmesa->uploadCliprects = GL_TRUE;
1004         sarea->ctxOwner = me;
1005     }
1006
1007     viaXMesaWindowMoved(vmesa);
1008 #ifdef DEBUG
1009     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
1010 #endif
1011 }
1012
1013 void viaLock(viaContextPtr vmesa, GLuint flags)
1014 {
1015     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
1016     __DRIscreenPrivate *sPriv = vmesa->driScreen;
1017
1018     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
1019
1020     /*=* John Sheng [2003.6.16] for xf43 */
1021     if(dPriv->pStamp == NULL)
1022         dPriv->pStamp = &dPriv->lastStamp;
1023
1024     if (*(dPriv->pStamp) != dPriv->lastStamp || vmesa->saam) {
1025         GLuint scrn;
1026         scrn = vmesa->saam & S_MASK;
1027
1028         DRM_SPINLOCK(&sPriv->pSAREA->drawable_lock, sPriv->drawLockID);
1029
1030         if (scrn == S1)
1031             __driUtilUpdateDrawableInfo(dPriv);
1032         else
1033             DRI_VALIDATE_DRAWABLE_INFO_ONCE(dPriv);
1034
1035         viaXMesaWindowMoved(vmesa);
1036         DRM_SPINUNLOCK(&sPriv->pSAREA->drawable_lock, sPriv->drawLockID);
1037     }
1038
1039     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
1040
1041     return;
1042 }
1043
1044 void viaUnLock(viaContextPtr vmesa, GLuint flags)
1045 {
1046     drm_via_sarea_t *sarea = vmesa->sarea;
1047     int me = vmesa->hHWContext;
1048
1049 #ifdef DEBUG
1050     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
1051     if (VIA_DEBUG) fprintf(stderr, "sarea->ctxOwner = %d\n", sarea->ctxOwner);
1052     if (VIA_DEBUG) fprintf(stderr, "me = %d\n", me);
1053 #endif
1054     if (sarea->ctxOwner == me) {
1055         sarea->ctxOwner = 0;
1056     }
1057 #ifdef DEBUG
1058     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
1059 #endif
1060 }
1061
1062 void
1063 viaSwapBuffers(__DRIdrawablePrivate *drawablePrivate)
1064 {
1065     __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *)drawablePrivate;
1066 #ifdef DEBUG
1067     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
1068 #endif
1069     if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
1070         viaContextPtr vmesa;
1071         GLcontext *ctx;
1072
1073         vmesa = (viaContextPtr)dPriv->driContextPriv->driverPrivate;
1074         ctx = vmesa->glCtx;
1075         if (ctx->Visual.doubleBufferMode) {
1076             _mesa_notifySwapBuffers(ctx);
1077             if (vmesa->doPageFlip) {
1078                 viaPageFlip(dPriv);
1079             }
1080             else {
1081                 viaCopyBuffer(dPriv);
1082             }
1083         }
1084         else
1085             VIA_FIREVERTICES(vmesa);
1086     }
1087     else {
1088         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
1089     }
1090 #ifdef DEBUG
1091     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
1092 #endif
1093 }