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