src/mesa/drivers/dri/savage/savageioctl.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 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <sys/mman.h>
  29
  30 #include "main/mtypes.h"
  31 #include "main/macros.h"
  32 #include "main/dd.h"
  33 #include "main/context.h"
  34 #include "main/colormac.h"
  35 #include "main/mm.h"
  36 #include "swrast/swrast.h"
  37
  38 #include "savagecontext.h"
  39 #include "savageioctl.h"
  40 #include "savagestate.h"
  41 #include "savagespan.h"
  42
  43 #include "drm.h"
  44 #include <sys/timeb.h>
  45
  46 #define DEPTH_SCALE_16 ((1<<16)-1)
  47 #define DEPTH_SCALE_24 ((1<<24)-1)
  48
  49
  50 void savageGetDMABuffer( savageContextPtr imesa )
  51 {
  52    int idx = 0;
  53    int size = 0;
  54    drmDMAReq dma;
  55    int retcode;
  56    drmBufPtr buf;
  57
  58    assert (imesa->savageScreen->bufs);
  59
  60    if (SAVAGE_DEBUG & DEBUG_DMA)
  61       fprintf(stderr,  "Getting dma buffer\n");
  62
  63    dma.context = imesa->hHWContext;
  64    dma.send_count = 0;
  65    dma.send_list = NULL;
  66    dma.send_sizes = NULL;
  67    dma.flags = 0;
  68    dma.request_count = 1;
  69    dma.request_size = imesa->bufferSize;
  70    dma.request_list = &idx;
  71    dma.request_sizes = &size;
  72    dma.granted_count = 0;
  73
  74
  75    if (SAVAGE_DEBUG & DEBUG_DMA)
  76       fprintf(stderr, "drmDMA (get) ctx %d count %d size 0x%x\n",
  77            dma.context, dma.request_count,
  78            dma.request_size);
  79
  80    while (1) {
  81       retcode = drmDMA(imesa->driFd, &dma);
  82
  83       if (SAVAGE_DEBUG & DEBUG_DMA)
  84          fprintf(stderr, "retcode %d sz %d idx %d count %d\n",
  85                  retcode,
  86                  dma.request_sizes[0],
  87                  dma.request_list[0],
  88                  dma.granted_count);
  89
  90       if (retcode == 0 &&
  91           dma.request_sizes[0] &&
  92           dma.granted_count)
  93          break;
  94
  95       if (SAVAGE_DEBUG & DEBUG_DMA)
  96          fprintf(stderr, "\n\nflush");
  97    }
  98
  99    buf = &(imesa->savageScreen->bufs->list[idx]);
 100
 101    if (SAVAGE_DEBUG & DEBUG_DMA)
 102       fprintf(stderr,
 103            "drmDMA (get) returns size[0] 0x%x idx[0] %d\n"
 104            "dma_buffer now: buf idx: %d size: %d used: %d addr %p\n",
 105            dma.request_sizes[0], dma.request_list[0],
 106            buf->idx, buf->total,
 107            buf->used, buf->address);
 108
 109    imesa->dmaVtxBuf.total = buf->total / 4;
 110    imesa->dmaVtxBuf.used = 0;
 111    imesa->dmaVtxBuf.flushed = 0;
 112    imesa->dmaVtxBuf.idx = buf->idx;
 113    imesa->dmaVtxBuf.buf = (uint32_t *)buf->address;
 114
 115    if (SAVAGE_DEBUG & DEBUG_DMA)
 116       fprintf(stderr, "finished getbuffer\n");
 117 }
 118
 119 #if 0
 120 /* Still keeping this around because it demonstrates page flipping and
 121  * automatic z-clear. */
 122 static void savage_BCI_clear(struct gl_context *ctx, drm_savage_clear_t *pclear)
 123 {
 124         savageContextPtr imesa = SAVAGE_CONTEXT(ctx);
 125         int nbox = imesa->sarea->nbox;
 126         drm_clip_rect_t *pbox = imesa->sarea->boxes;
 127         int i;
 128
 129
 130         if (nbox > SAVAGE_NR_SAREA_CLIPRECTS)
 131                 nbox = SAVAGE_NR_SAREA_CLIPRECTS;
 132
 133         for (i = 0 ; i < nbox ; i++, pbox++) {
 134                 unsigned int x = pbox->x1;
 135                 unsigned int y = pbox->y1;
 136                 unsigned int width = pbox->x2 - x;
 137                 unsigned int height = pbox->y2 - y;
 138                 uint32_t *bciptr;
 139
 140                 if (pbox->x1 > pbox->x2 ||
 141                     pbox->y1 > pbox->y2 ||
 142                     pbox->x2 > imesa->savageScreen->width ||
 143                     pbox->y2 > imesa->savageScreen->height)
 144                         continue;
 145
 146                 if ( pclear->flags & SAVAGE_FRONT ) {
 147                         bciptr = savageDMAAlloc (imesa, 8);
 148                         WRITE_CMD((bciptr) , 0x4BCC8C00,uint32_t);
 149                         WRITE_CMD((bciptr) , imesa->savageScreen->frontOffset,uint32_t);
 150                         WRITE_CMD((bciptr) , imesa->savageScreen->frontBitmapDesc,uint32_t);
 151                         WRITE_CMD((bciptr) , pclear->clear_color,uint32_t);
 152                         WRITE_CMD((bciptr) , (y <<16) | x,uint32_t);
 153                         WRITE_CMD((bciptr) , (height << 16) | width,uint32_t);
 154                         savageDMACommit (imesa, bciptr);
 155                 }
 156                 if ( pclear->flags & SAVAGE_BACK ) {
 157                         bciptr = savageDMAAlloc (imesa, 8);
 158                         WRITE_CMD((bciptr) , 0x4BCC8C00,uint32_t);
 159                         WRITE_CMD((bciptr) , imesa->savageScreen->backOffset,uint32_t);
 160                         WRITE_CMD((bciptr) , imesa->savageScreen->backBitmapDesc,uint32_t);
 161                         WRITE_CMD((bciptr) , pclear->clear_color,uint32_t);
 162                         WRITE_CMD((bciptr) , (y <<16) | x,uint32_t);
 163                         WRITE_CMD((bciptr) , (height << 16) | width,uint32_t);
 164                         savageDMACommit (imesa, bciptr);
 165                 }
 166
 167                 if ( pclear->flags & (SAVAGE_DEPTH |SAVAGE_STENCIL) ) {
 168                         uint32_t writeMask = 0x0;
 169                         if(imesa->hw_stencil)
 170                         {
 171                             if(pclear->flags & SAVAGE_STENCIL)
 172                             {
 173
 174                                  writeMask |= 0xFF000000;
 175                             }
 176                             if(pclear->flags & SAVAGE_DEPTH)
 177                             {
 178                                  writeMask |= 0x00FFFFFF;
 179                             }
 180                         }
 181                         if(imesa->IsFullScreen && imesa->NotFirstFrame &&
 182                            imesa->savageScreen->chipset >= S3_SAVAGE4)
 183                         {
 184                             imesa->regs.s4.zBufCtrl.ni.autoZEnable = GL_TRUE;
 185                             imesa->regs.s4.zBufCtrl.ni.frameID =
 186                                 ~imesa->regs.s4.zBufCtrl.ni.frameID;
 187
 188                             imesa->dirty |= SAVAGE_UPLOAD_GLOBAL;
 189                         }
 190                         else
 191                         {
 192                             if(imesa->IsFullScreen)
 193                                 imesa->NotFirstFrame = GL_TRUE;
 194
 195                             if(imesa->hw_stencil)
 196                             {
 197                                 bciptr = savageDMAAlloc (imesa, 10);
 198                                 if(writeMask != 0xFFFFFFFF)
 199                                 {
 200                                     WRITE_CMD((bciptr) , 0x960100D7,uint32_t);
 201                                     WRITE_CMD((bciptr) , writeMask,uint32_t);
 202                                 }
 203                             }
 204                             else
 205                             {
 206                                 bciptr = savageDMAAlloc (imesa, 6);
 207                             }
 208
 209                             WRITE_CMD((bciptr) , 0x4BCC8C00,uint32_t);
 210                             WRITE_CMD((bciptr) , imesa->savageScreen->depthOffset,uint32_t);
 211                             WRITE_CMD((bciptr) , imesa->savageScreen->depthBitmapDesc,uint32_t);
 212                             WRITE_CMD((bciptr) , pclear->clear_depth,uint32_t);
 213                             WRITE_CMD((bciptr) , (y <<16) | x,uint32_t);
 214                             WRITE_CMD((bciptr) , (height << 16) | width,uint32_t);
 215                             if(imesa->hw_stencil)
 216                             {
 217                                 if(writeMask != 0xFFFFFFFF)
 218                                 {
 219                                    WRITE_CMD((bciptr) , 0x960100D7,uint32_t);
 220                                    WRITE_CMD((bciptr) , 0xFFFFFFFF,uint32_t);
 221                                 }
 222                             }
 223                             savageDMACommit (imesa, bciptr);
 224                         }
 225                 }
 226         }
 227         /* FK: Make sure that the clear stuff is emitted. Otherwise a
 228            software fallback may get overwritten by a delayed clear. */
 229         savageDMAFlush (imesa);
 230 }
 231
 232 static void savage_BCI_swap(savageContextPtr imesa)
 233 {
 234     int nbox = imesa->sarea->nbox;
 235     drm_clip_rect_t *pbox = imesa->sarea->boxes;
 236     int i;
 237     volatile uint32_t *bciptr;
 238
 239     if (nbox > SAVAGE_NR_SAREA_CLIPRECTS)
 240         nbox = SAVAGE_NR_SAREA_CLIPRECTS;
 241     savageDMAFlush (imesa);
 242
 243     if(imesa->IsFullScreen)
 244     { /* full screen*/
 245         unsigned int tmp0;
 246         tmp0 = imesa->savageScreen->frontOffset;
 247         imesa->savageScreen->frontOffset = imesa->savageScreen->backOffset;
 248         imesa->savageScreen->backOffset = tmp0;
 249
 250         if(imesa->toggle == TARGET_BACK)
 251             imesa->toggle = TARGET_FRONT;
 252         else
 253             imesa->toggle = TARGET_BACK;
 254
 255         driFlipRenderbuffers(imesa->glCtx->DrawBuffer,
 256                              imesa->toggle != TARGET_FRONT);
 257
 258         imesa->regs.s4.destCtrl.ni.offset = imesa->savageScreen->backOffset>>11;
 259         imesa->dirty |= SAVAGE_UPLOAD_GLOBAL;
 260         bciptr = SAVAGE_GET_BCI_POINTER(imesa,3);
 261         *(bciptr) = 0x960100B0;
 262         *(bciptr) = (imesa->savageScreen->frontOffset);
 263         *(bciptr) = 0xA0000000;
 264     }
 265
 266     else
 267     {  /* Use bitblt copy from back to front buffer*/
 268
 269         for (i = 0 ; i < nbox; i++, pbox++)
 270         {
 271             unsigned int w = pbox->x2 - pbox->x1;
 272             unsigned int h = pbox->y2 - pbox->y1;
 273
 274             if (pbox->x1 > pbox->x2 ||
 275                 pbox->y1 > pbox->y2 ||
 276                 pbox->x2 > imesa->savageScreen->width ||
 277                 pbox->y2 > imesa->savageScreen->height)
 278                 continue;
 279
 280             bciptr = SAVAGE_GET_BCI_POINTER(imesa,6);
 281
 282             *(bciptr) = 0x4BCC00C0;
 283
 284             *(bciptr) = imesa->savageScreen->backOffset;
 285             *(bciptr) = imesa->savageScreen->backBitmapDesc;
 286             *(bciptr) = (pbox->y1 <<16) | pbox->x1;   /*x0, y0*/
 287             *(bciptr) = (pbox->y1 <<16) | pbox->x1;
 288             *(bciptr) = (h << 16) | w;
 289         }
 290
 291     }
 292 }
 293 #endif
 294
 295
 296 static GLboolean intersect_rect( drm_clip_rect_t *out,
 297                                  const drm_clip_rect_t *a,
 298                                  const drm_clip_rect_t *b )
 299 {
 300    *out = *a;
 301    if (b->x1 > out->x1) out->x1 = b->x1;
 302    if (b->y1 > out->y1) out->y1 = b->y1;
 303    if (b->x2 < out->x2) out->x2 = b->x2;
 304    if (b->y2 < out->y2) out->y2 = b->y2;
 305
 306    return ((out->x1 < out->x2) && (out->y1 < out->y2));
 307 }
 308
 309
 310 static GLuint savageIntersectClipRects(drm_clip_rect_t *dest,
 311                                        const drm_clip_rect_t *src,
 312                                        GLuint nsrc,
 313                                        const drm_clip_rect_t *clip)
 314 {
 315     GLuint i, ndest;
 316
 317     for (i = 0, ndest = 0; i < nsrc; ++i, ++src) {
 318         if (intersect_rect(dest, src, clip)) {
 319             dest++;
 320             ndest++;
 321         }
 322     }
 323
 324     return ndest;
 325 }
 326
 327
 328 static void savageDDClear( struct gl_context *ctx, GLbitfield mask )
 329 {
 330    savageContextPtr imesa = SAVAGE_CONTEXT( ctx );
 331    GLuint colorMask, depthMask, clearColor, clearDepth, flags;
 332    GLint cx = ctx->DrawBuffer->_Xmin;
 333    GLint cy = ctx->DrawBuffer->_Ymin;
 334    GLint cw = ctx->DrawBuffer->_Xmax - cx;
 335    GLint ch = ctx->DrawBuffer->_Ymax - cy;
 336
 337    /* XXX FIX ME: the cx,cy,cw,ch vars are currently ignored! */
 338    (void) ch;
 339    (void) cw;
 340
 341    if (SAVAGE_DEBUG & DEBUG_VERBOSE_MSG)
 342        fprintf (stderr, "%s\n", __FUNCTION__);
 343
 344    clearColor = imesa->ClearColor;
 345    if (imesa->float_depth) {
 346        if (imesa->savageScreen->zpp == 2)
 347            clearDepth = savageEncodeFloat16(1.0 - ctx->Depth.Clear);
 348        else
 349            clearDepth = savageEncodeFloat24(1.0 - ctx->Depth.Clear);
 350    } else {
 351        if (imesa->savageScreen->zpp == 2)
 352            clearDepth = (GLuint) ((1.0 - ctx->Depth.Clear) * DEPTH_SCALE_16);
 353        else
 354            clearDepth = (GLuint) ((1.0 - ctx->Depth.Clear) * DEPTH_SCALE_24);
 355    }
 356
 357    colorMask = 0;
 358    depthMask = 0;
 359    switch (imesa->savageScreen->cpp) {
 360    case 2:
 361        colorMask = PACK_COLOR_565(ctx->Color.ColorMask[0][0],
 362                                   ctx->Color.ColorMask[0][1],
 363                                   ctx->Color.ColorMask[0][2]);
 364        break;
 365    case 4:
 366        colorMask = PACK_COLOR_8888(ctx->Color.ColorMask[0][3],
 367                                    ctx->Color.ColorMask[0][2],
 368                                    ctx->Color.ColorMask[0][1],
 369                                    ctx->Color.ColorMask[0][0]);
 370        break;
 371    }
 372
 373    flags = 0;
 374
 375    if (mask & BUFFER_BIT_FRONT_LEFT) {
 376       flags |= SAVAGE_FRONT;
 377       mask &= ~BUFFER_BIT_FRONT_LEFT;
 378    }
 379
 380    if (mask & BUFFER_BIT_BACK_LEFT) {
 381       flags |= SAVAGE_BACK;
 382       mask &= ~BUFFER_BIT_BACK_LEFT;
 383    }
 384
 385    if ((mask & BUFFER_BIT_DEPTH) && ctx->Depth.Mask) {
 386       flags |= SAVAGE_DEPTH;
 387       depthMask |=
 388           (imesa->savageScreen->zpp == 2) ? 0xffffffff : 0x00ffffff;
 389       mask &= ~BUFFER_BIT_DEPTH;
 390    }
 391
 392    if((mask & BUFFER_BIT_STENCIL) && imesa->hw_stencil)
 393    {
 394       flags |= SAVAGE_DEPTH;
 395       depthMask |= 0xff000000;
 396       mask &= ~BUFFER_BIT_STENCIL;
 397    }
 398
 399    savageFlushVertices(imesa);
 400
 401    if (flags) {
 402        GLboolean depthCleared = GL_FALSE;
 403        if (flags & (SAVAGE_FRONT|SAVAGE_BACK)) {
 404            drm_savage_cmd_header_t *cmd;
 405            cmd = savageAllocCmdBuf(imesa, sizeof(drm_savage_cmd_header_t));
 406            cmd[0].clear0.cmd = SAVAGE_CMD_CLEAR;
 407            if ((flags & SAVAGE_DEPTH) &&
 408                clearDepth == clearColor && depthMask == colorMask) {
 409                cmd[0].clear0.flags = flags;
 410                depthCleared = GL_TRUE;
 411            } else
 412                cmd[0].clear0.flags = flags & (SAVAGE_FRONT|SAVAGE_BACK);
 413            cmd[1].clear1.mask = colorMask;
 414            cmd[1].clear1.value = clearColor;
 415        }
 416
 417        if ((flags & SAVAGE_DEPTH) && !depthCleared) {
 418            drm_savage_cmd_header_t *cmd;
 419            cmd = savageAllocCmdBuf(imesa, sizeof(drm_savage_cmd_header_t));
 420            cmd[0].clear0.cmd = SAVAGE_CMD_CLEAR;
 421            cmd[0].clear0.flags = SAVAGE_DEPTH;
 422            cmd[1].clear1.mask = depthMask;
 423            cmd[1].clear1.value = clearDepth;
 424        }
 425    }
 426
 427    if (mask)
 428       _swrast_Clear( ctx, mask );
 429 }
 430
 431 /*
 432  * Copy the back buffer to the front buffer.
 433  */
 434 void savageSwapBuffers( __DRIdrawable *dPriv )
 435 {
 436    savageContextPtr imesa;
 437
 438    if (SAVAGE_DEBUG & DEBUG_VERBOSE_MSG)
 439        fprintf (stderr, "%s\n================================\n", __FUNCTION__);
 440
 441    assert(dPriv);
 442    assert(dPriv->driContextPriv);
 443    assert(dPriv->driContextPriv->driverPrivate);
 444
 445    imesa = (savageContextPtr) dPriv->driContextPriv->driverPrivate;
 446    if (imesa->IsDouble)
 447        _mesa_notifySwapBuffers( imesa->glCtx );
 448
 449    FLUSH_BATCH(imesa);
 450
 451    if (imesa->sync_frames)
 452        imesa->lastSwap = savageEmitEvent( imesa, 0 );
 453
 454    if (imesa->lastSwap != 0)
 455        savageWaitEvent( imesa, imesa->lastSwap );
 456
 457    {
 458        drm_savage_cmd_header_t *cmd = savageAllocCmdBuf(imesa, 0);
 459        cmd->cmd.cmd = SAVAGE_CMD_SWAP;
 460        imesa->inSwap = GL_TRUE; /* ignore scissors in savageFlushCmdBuf */
 461        savageFlushCmdBuf(imesa, GL_FALSE);
 462        imesa->inSwap = GL_FALSE;
 463    }
 464
 465    if (!imesa->sync_frames)
 466        /* don't sync, but limit the lag to one frame. */
 467        imesa->lastSwap = savageEmitEvent( imesa, 0 );
 468 }
 469
 470 unsigned int savageEmitEventLocked( savageContextPtr imesa, unsigned int flags )
 471 {
 472     drm_savage_event_emit_t event;
 473     int ret;
 474     event.count = 0;
 475     event.flags = flags;
 476     ret = drmCommandWriteRead( imesa->driFd, DRM_SAVAGE_BCI_EVENT_EMIT,
 477                                &event, sizeof(event) );
 478     if (ret) {
 479         fprintf (stderr, "emit event returned %d\n", ret);
 480         exit (1);
 481     }
 482     return event.count;
 483 }
 484 unsigned int savageEmitEvent( savageContextPtr imesa, unsigned int flags )
 485 {
 486     unsigned int ret;
 487     LOCK_HARDWARE( imesa );
 488     ret = savageEmitEventLocked( imesa, flags );
 489     UNLOCK_HARDWARE( imesa );
 490     return ret;
 491 }
 492
 493
 494 void savageWaitEvent( savageContextPtr imesa, unsigned int count )
 495 {
 496     drm_savage_event_wait_t event;
 497     int ret;
 498     event.count = count;
 499     event.flags = 0;
 500     ret = drmCommandWriteRead( imesa->driFd, DRM_SAVAGE_BCI_EVENT_WAIT,
 501                                &event, sizeof(event) );
 502     if (ret) {
 503         fprintf (stderr, "wait event returned %d\n", ret);
 504         exit (1);
 505     }
 506 }
 507
 508
 509 void savageFlushVertices( savageContextPtr imesa )
 510 {
 511     struct savage_vtxbuf_t *buffer = imesa->vtxBuf;
 512
 513     if (SAVAGE_DEBUG & DEBUG_VERBOSE_MSG)
 514         fprintf (stderr, "%s\n", __FUNCTION__);
 515
 516     if (!buffer->total)
 517         return;
 518
 519     if (buffer->used > buffer->flushed) {
 520         drm_savage_cmd_header_t *cmd;
 521         /* State must be updated "per primitive" because hardware
 522          * culling must be disabled for unfilled primitives, points
 523          * and lines. */
 524         savageEmitChangedState (imesa);
 525         cmd = savageAllocCmdBuf(imesa, 0);
 526         cmd->prim.cmd = buffer == &imesa->dmaVtxBuf ?
 527             SAVAGE_CMD_DMA_PRIM : SAVAGE_CMD_VB_PRIM;
 528         cmd->prim.prim = imesa->HwPrim;
 529         cmd->prim.skip = imesa->skip;
 530         cmd->prim.start = buffer->flushed / imesa->HwVertexSize;
 531         cmd->prim.count = buffer->used / imesa->HwVertexSize - cmd->prim.start;
 532         buffer->flushed = buffer->used;
 533     }
 534 }
 535
 536 void savageFlushCmdBufLocked( savageContextPtr imesa, GLboolean discard )
 537 {
 538     __DRIdrawable *dPriv = imesa->driDrawable;
 539
 540     if (!imesa->dmaVtxBuf.total)
 541         discard = GL_FALSE;
 542
 543     /* complete indexed drawing commands */
 544     savageFlushElts(imesa);
 545
 546     if (imesa->cmdBuf.write != imesa->cmdBuf.start || discard) {
 547         drm_savage_cmdbuf_t cmdbuf;
 548         drm_savage_cmd_header_t *start;
 549         int ret;
 550
 551         /* If we lost the context we must restore the initial state (at
 552          * the start of the command buffer). */
 553         if (imesa->lostContext) {
 554             start = imesa->cmdBuf.base;
 555             imesa->lostContext = GL_FALSE;
 556         } else
 557             start = imesa->cmdBuf.start;
 558
 559         if ((SAVAGE_DEBUG & DEBUG_DMA) && discard)
 560             fprintf (stderr, "Discarding DMA buffer, used=%u\n",
 561                      imesa->dmaVtxBuf.used);
 562
 563         cmdbuf.dma_idx = imesa->dmaVtxBuf.idx;
 564         cmdbuf.discard = discard;
 565         cmdbuf.vb_addr = imesa->clientVtxBuf.buf;
 566         cmdbuf.vb_size = imesa->clientVtxBuf.total*4;
 567         cmdbuf.vb_stride = imesa->HwVertexSize;
 568         cmdbuf.cmd_addr = start;
 569         cmdbuf.size = (imesa->cmdBuf.write - start);
 570         if (!imesa->inSwap && imesa->scissor.enabled) {
 571             drm_clip_rect_t *box = dPriv->pClipRects, *ibox;
 572             drm_clip_rect_t scissor;
 573             GLuint nbox = dPriv->numClipRects, nibox;
 574             /* transform and clip scissor to viewport */
 575             scissor.x1 = MAX2(imesa->scissor.x, 0) + dPriv->x;
 576             scissor.y1 = MAX2(dPriv->h - imesa->scissor.y - imesa->scissor.h,
 577                               0) + dPriv->y;
 578             scissor.x2 = MIN2(imesa->scissor.x + imesa->scissor.w,
 579                               dPriv->w) + dPriv->x;
 580             scissor.y2 = MIN2(dPriv->h - imesa->scissor.y,
 581                               dPriv->h) + dPriv->y;
 582             /* intersect cliprects with scissor */
 583             ibox = malloc(dPriv->numClipRects*sizeof(drm_clip_rect_t));
 584             if (!ibox) {
 585                 fprintf(stderr, "Out of memory.\n");
 586                 exit(1);
 587             }
 588             nibox = savageIntersectClipRects(ibox, box, nbox, &scissor);
 589             cmdbuf.nbox = nibox;
 590             cmdbuf.box_addr = ibox;
 591         } else {
 592             cmdbuf.nbox = dPriv->numClipRects;
 593             cmdbuf.box_addr = dPriv->pClipRects;
 594         }
 595
 596         ret = drmCommandWrite( imesa->driFd, DRM_SAVAGE_BCI_CMDBUF,
 597                                &cmdbuf, sizeof(cmdbuf) );
 598         if (ret) {
 599             fprintf (stderr, "cmdbuf ioctl returned %d\n", ret);
 600             exit(1);
 601         }
 602
 603         if (cmdbuf.box_addr != dPriv->pClipRects) {
 604             free(cmdbuf.box_addr);
 605         }
 606
 607         /* Save the current state at the start of the command buffer. That
 608          * state will only be emitted, if the context was lost since the
 609          * last command buffer. */
 610         imesa->cmdBuf.write = imesa->cmdBuf.base;
 611         savageEmitOldState(imesa);
 612         imesa->cmdBuf.start = imesa->cmdBuf.write;
 613     }
 614
 615     if (discard) {
 616         assert (!savageHaveIndexedVerts(imesa));
 617         imesa->dmaVtxBuf.total = 0;
 618         imesa->dmaVtxBuf.used = 0;
 619         imesa->dmaVtxBuf.flushed = 0;
 620     }
 621     if (!savageHaveIndexedVerts(imesa)) {
 622         imesa->clientVtxBuf.used = 0;
 623         imesa->clientVtxBuf.flushed = 0;
 624     }
 625 }
 626
 627
 628 void savageFlushCmdBuf( savageContextPtr imesa, GLboolean discard )
 629 {
 630     if (SAVAGE_DEBUG & DEBUG_VERBOSE_MSG)
 631         fprintf (stderr, "%s\n", __FUNCTION__);
 632     LOCK_HARDWARE(imesa);
 633     savageFlushCmdBufLocked (imesa, discard);
 634     UNLOCK_HARDWARE(imesa);
 635 }
 636
 637
 638 static void savageDDFlush( struct gl_context *ctx )
 639 {
 640     savageContextPtr imesa = SAVAGE_CONTEXT(ctx);
 641     if (SAVAGE_DEBUG & DEBUG_VERBOSE_MSG)
 642         fprintf (stderr, "%s\n", __FUNCTION__);
 643     savageFlushVertices (imesa);
 644     savageFlushCmdBuf(imesa, GL_FALSE);
 645 }
 646
 647 static void savageDDFinish( struct gl_context *ctx  )
 648 {
 649     savageContextPtr imesa = SAVAGE_CONTEXT(ctx);
 650     if (SAVAGE_DEBUG & DEBUG_VERBOSE_MSG)
 651         fprintf (stderr, "%s\n", __FUNCTION__);
 652     savageFlushVertices (imesa);
 653     savageFlushCmdBuf(imesa, GL_FALSE);
 654     WAIT_IDLE_EMPTY(imesa);
 655 }
 656
 657 void savageDDInitIoctlFuncs( struct gl_context *ctx )
 658 {
 659    ctx->Driver.Clear = savageDDClear;
 660    ctx->Driver.Flush = savageDDFlush;
 661    ctx->Driver.Finish = savageDDFinish;
 662 }