add the i830 driver - no kernel driver yet

(build tested, but not physically tested)

1 files changed, 841 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i830/i830_ioctl.c b/src/mesa/drivers/dri/i830/i830_ioctl.c
new file mode 100644
index 00000000000..607b813e536
--- /dev/null
+++ b/src/mesa/drivers/dri/i830/i830_ioctl.c
@@ -0,0 +1,841 @@
+
+/**************************************************************************
+
+Copyright 2001 VA Linux Systems Inc., Fremont, California.
+
+All Rights Reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+on the rights to use, copy, modify, merge, publish, distribute, sub
+license, and/or sell copies of the Software, and to permit persons to whom
+the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice (including the next
+paragraph) shall be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ATI, VA LINUX SYSTEMS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+**************************************************************************/
+
+/* $XFree86: xc/lib/GL/mesa/src/drv/i830/i830_ioctl.c,v 1.5 2002/12/10 01:26:53 dawes Exp $ */
+
+/*
+ * Author:
+ *   Jeff Hartmann <[email protected]>
+ *   Graeme Fisher <[email protected]>
+ *   Abraham vd Merwe <[email protected]>
+ *
+ * Heavily based on the I810 driver, which was written by:
+ *   Keith Whitwell <[email protected]>
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "glheader.h"
+#include "mtypes.h"
+#include "macros.h"
+#include "dd.h"
+#include "swrast/swrast.h"
+
+#include "mm.h"
+
+#include "i830_screen.h"
+#include "i830_dri.h"
+
+#include "i830_context.h"
+#include "i830_ioctl.h"
+#include "i830_state.h"
+#include "i830_debug.h"
+
+#include "drm.h"
+
+static drmBufPtr i830_get_buffer_ioctl( i830ContextPtr imesa )
+{
+   drmI830DMA dma;
+   drmBufPtr buf;
+   int retcode,i = 0;
+   while (1) {
+      retcode = drmCommandWriteRead(imesa->driFd, 
+				    DRM_I830_GETBUF, 
+				    &dma, 
+				    sizeof(drmI830DMA));
+      if (dma.granted == 1 && retcode == 0)
+	break;
+
+      if (++i > 1000) {
+	 imesa->sarea->perf_boxes |= I830_BOX_WAIT;
+	 retcode = drmCommandNone(imesa->driFd, DRM_I830_FLUSH);
+	 i = 0;
+      }
+   }
+
+   buf = &(imesa->i830Screen->bufs->list[dma.request_idx]);
+   buf->idx = dma.request_idx;
+   buf->used = 0;
+   buf->total = dma.request_size;
+   buf->address = (drmAddress)dma.virtual;
+
+   return buf;
+}
+
+static void i830ClearDrawQuad(i830ContextPtr imesa, float left, 
+				 float right,
+				 float bottom, float top, GLubyte red,
+				 GLubyte green, GLubyte blue, GLubyte alpha)
+{
+    GLuint *vb = i830AllocDmaLowLocked( imesa, 128 );
+    i830Vertex tmp;
+    int i;
+
+    /* PRIM3D_TRIFAN */
+
+    /* initial vertex, left bottom */
+    tmp.v.x = left;
+    tmp.v.y = bottom;
+    tmp.v.z = 1.0;
+    tmp.v.w = 1.0;
+    tmp.v.color.red = red;
+    tmp.v.color.green = green;
+    tmp.v.color.blue = blue;
+    tmp.v.color.alpha = alpha;
+    tmp.v.specular.red = 0;
+    tmp.v.specular.green = 0;
+    tmp.v.specular.blue = 0;
+    tmp.v.specular.alpha = 0;
+    tmp.v.u0 = 0.0f;
+    tmp.v.v0 = 0.0f;
+    for (i = 0 ; i < 8 ; i++)
+        vb[i] = tmp.ui[i];
+
+    /* right bottom */
+    vb += 8;
+    tmp.v.x = right;
+    for (i = 0 ; i < 8 ; i++)
+        vb[i] = tmp.ui[i];
+
+    /* right top */
+    vb += 8;
+    tmp.v.y = top;
+    for (i = 0 ; i < 8 ; i++)
+        vb[i] = tmp.ui[i];
+
+    /* left top */
+    vb += 8;
+    tmp.v.x = left;
+    for (i = 0 ; i < 8 ; i++)
+        vb[i] = tmp.ui[i];
+}
+
+static void i830ClearWithTris(GLcontext *ctx, GLbitfield mask,
+				 GLboolean all,
+				 GLint cx, GLint cy, GLint cw, GLint ch)
+{
+   i830ContextPtr imesa = I830_CONTEXT( ctx );
+   __DRIdrawablePrivate *dPriv = imesa->driDrawable;
+   i830ScreenPrivate *i830Screen = imesa->i830Screen;
+   I830SAREAPtr sarea = imesa->sarea;
+   GLuint old_vertex_prim;
+   GLuint old_dirty;
+   int x0, y0, x1, y1;
+
+   if (I830_DEBUG & DEBUG_IOCTL) 
+     fprintf(stderr, "Clearing with triangles\n");
+
+   old_dirty = imesa->dirty & ~I830_UPLOAD_CLIPRECTS;
+   /* Discard all the dirty flags except the cliprect one, reset later */
+   imesa->dirty &= I830_UPLOAD_CLIPRECTS;
+
+   if(!all) {
+      x0 = cx;
+      y0 = cy;
+      x1 = x0 + cw;
+      y1 = y0 + ch;
+   } else {
+      x0 = 0;
+      y0 = 0;
+      x1 = x0 + dPriv->w;
+      y1 = y0 + dPriv->h;
+   }
+
+   /* Clip to Screen */
+   if (x0 < 0) x0 = 0;
+   if (y0 < 0) y0 = 0;
+   if (x1 > i830Screen->width-1) x1 = i830Screen->width-1;
+   if (y1 > i830Screen->height-1) y1 = i830Screen->height-1;
+
+   LOCK_HARDWARE(imesa);
+   memcpy(sarea->ContextState,
+	  imesa->Init_Setup,
+	  sizeof(imesa->Setup) );
+   memcpy(sarea->BufferState,
+	  imesa->BufferSetup,
+	  sizeof(imesa->BufferSetup) );
+   sarea->StippleState[I830_STPREG_ST1] = 0;
+
+   old_vertex_prim = imesa->hw_primitive;
+   imesa->hw_primitive = PRIM3D_TRIFAN;
+
+   if(mask & DD_FRONT_LEFT_BIT) {
+      GLuint tmp = sarea->ContextState[I830_CTXREG_ENABLES_2];
+
+      sarea->dirty |= (I830_UPLOAD_CTX | I830_UPLOAD_BUFFERS |
+		       I830_UPLOAD_TEXBLEND0);
+
+      sarea->TexBlendState[0][0] = (STATE3D_MAP_BLEND_OP_CMD(0) |
+				    TEXPIPE_COLOR |
+				    ENABLE_TEXOUTPUT_WRT_SEL |
+				    TEXOP_OUTPUT_CURRENT |
+				    DISABLE_TEX_CNTRL_STAGE |
+				    TEXOP_SCALE_1X |
+				    TEXOP_MODIFY_PARMS |
+				    TEXOP_LAST_STAGE |
+				    TEXBLENDOP_ARG1);
+      sarea->TexBlendState[0][1] = (STATE3D_MAP_BLEND_OP_CMD(0) |
+				    TEXPIPE_ALPHA |
+				    ENABLE_TEXOUTPUT_WRT_SEL |
+				    TEXOP_OUTPUT_CURRENT |
+				    TEXOP_SCALE_1X |
+				    TEXOP_MODIFY_PARMS |
+				    TEXBLENDOP_ARG1);
+      sarea->TexBlendState[0][2] = (STATE3D_MAP_BLEND_ARG_CMD(0) |
+				    TEXPIPE_COLOR |
+				    TEXBLEND_ARG1 |
+				    TEXBLENDARG_MODIFY_PARMS |
+				    TEXBLENDARG_CURRENT);
+      sarea->TexBlendState[0][3] = (STATE3D_MAP_BLEND_ARG_CMD(0) |
+				    TEXPIPE_ALPHA |
+				    TEXBLEND_ARG1 |
+				    TEXBLENDARG_MODIFY_PARMS |
+				    TEXBLENDARG_CURRENT);
+      sarea->TexBlendStateWordsUsed[0] = 4;
+
+      tmp &= ~(ENABLE_STENCIL_WRITE | ENABLE_DEPTH_WRITE);
+      tmp |= (DISABLE_STENCIL_WRITE | 
+	      DISABLE_DEPTH_WRITE |
+	      (imesa->mask_red << WRITEMASK_RED_SHIFT) |
+	      (imesa->mask_green << WRITEMASK_GREEN_SHIFT) |
+	      (imesa->mask_blue << WRITEMASK_BLUE_SHIFT) |
+	      (imesa->mask_alpha << WRITEMASK_ALPHA_SHIFT));
+      sarea->ContextState[I830_CTXREG_ENABLES_2] = tmp;
+
+      if(0)
+	fprintf(stderr, "fcdq : r_mask(%d) g_mask(%d) b_mask(%d) a_mask(%d)\n",
+		imesa->mask_red, imesa->mask_green, imesa->mask_blue,
+		imesa->mask_alpha);
+
+      sarea->BufferState[I830_DESTREG_CBUFADDR] = i830Screen->fbOffset;
+
+      if(0)
+	fprintf(stderr, "fcdq : x0(%d) x1(%d) y0(%d) y1(%d)\n"
+		"r(0x%x) g(0x%x) b(0x%x) a(0x%x)\n",
+		x0, x1, y0, y1, imesa->clear_red, imesa->clear_green,
+		imesa->clear_blue, imesa->clear_alpha);
+
+      i830ClearDrawQuad(imesa, (float)x0, (float)x1, (float)y0, (float)y1,
+                        imesa->clear_red, imesa->clear_green,
+                        imesa->clear_blue, imesa->clear_alpha);
+      i830FlushPrimsLocked( imesa );
+   }
+
+   if(mask & DD_BACK_LEFT_BIT) {
+      GLuint tmp = sarea->ContextState[I830_CTXREG_ENABLES_2];
+
+      sarea->dirty |= (I830_UPLOAD_CTX | I830_UPLOAD_BUFFERS |
+		       I830_UPLOAD_TEXBLEND0);
+
+      sarea->TexBlendState[0][0] = (STATE3D_MAP_BLEND_OP_CMD(0) |
+				    TEXPIPE_COLOR |
+				    ENABLE_TEXOUTPUT_WRT_SEL |
+				    TEXOP_OUTPUT_CURRENT |
+				    DISABLE_TEX_CNTRL_STAGE |
+				    TEXOP_SCALE_1X |
+				    TEXOP_MODIFY_PARMS |
+				    TEXOP_LAST_STAGE |
+				    TEXBLENDOP_ARG1);
+      sarea->TexBlendState[0][1] = (STATE3D_MAP_BLEND_OP_CMD(0) |
+				    TEXPIPE_ALPHA |
+				    ENABLE_TEXOUTPUT_WRT_SEL |
+				    TEXOP_OUTPUT_CURRENT |
+				    TEXOP_SCALE_1X |
+				    TEXOP_MODIFY_PARMS |
+				    TEXBLENDOP_ARG1);
+      sarea->TexBlendState[0][2] = (STATE3D_MAP_BLEND_ARG_CMD(0) |
+				    TEXPIPE_COLOR |
+				    TEXBLEND_ARG1 |
+				    TEXBLENDARG_MODIFY_PARMS |
+				    TEXBLENDARG_CURRENT);
+      sarea->TexBlendState[0][3] = (STATE3D_MAP_BLEND_ARG_CMD(0) |
+				    TEXPIPE_ALPHA |
+				    TEXBLEND_ARG2 |
+				    TEXBLENDARG_MODIFY_PARMS |
+				    TEXBLENDARG_CURRENT);
+      sarea->TexBlendStateWordsUsed[0] = 4;
+
+      tmp &= ~(ENABLE_STENCIL_WRITE | ENABLE_DEPTH_WRITE);
+      tmp |= (DISABLE_STENCIL_WRITE | 
+	      DISABLE_DEPTH_WRITE |
+	      (imesa->mask_red << WRITEMASK_RED_SHIFT) |
+	      (imesa->mask_green << WRITEMASK_GREEN_SHIFT) |
+	      (imesa->mask_blue << WRITEMASK_BLUE_SHIFT) |
+	      (imesa->mask_alpha << WRITEMASK_ALPHA_SHIFT));
+
+      if(0)
+	fprintf(stderr, "bcdq : r_mask(%d) g_mask(%d) b_mask(%d) a_mask(%d)\n",
+		imesa->mask_red, imesa->mask_green, imesa->mask_blue,
+		imesa->mask_alpha);
+
+      sarea->ContextState[I830_CTXREG_ENABLES_2] = tmp;
+
+      sarea->BufferState[I830_DESTREG_CBUFADDR] = i830Screen->backOffset;
+
+      if(0)
+	fprintf(stderr, "bcdq : x0(%d) x1(%d) y0(%d) y1(%d)\n"
+		"r(0x%x) g(0x%x) b(0x%x) a(0x%x)\n",
+		x0, x1, y0, y1, imesa->clear_red, imesa->clear_green,
+		imesa->clear_blue, imesa->clear_alpha);
+
+      i830ClearDrawQuad(imesa, (float)x0, (float)x1, (float)y0, (float)y1,
+		      imesa->clear_red, imesa->clear_green,
+		      imesa->clear_blue, imesa->clear_alpha);
+      i830FlushPrimsLocked( imesa );
+   }
+
+   if(mask & DD_STENCIL_BIT) {
+      GLuint s_mask = ctx->Stencil.WriteMask[0];
+
+      sarea->dirty |= (I830_UPLOAD_CTX | I830_UPLOAD_BUFFERS |
+		       I830_UPLOAD_TEXBLEND0);
+
+      sarea->TexBlendState[0][0] = (STATE3D_MAP_BLEND_OP_CMD(0) |
+				    TEXPIPE_COLOR |
+				    ENABLE_TEXOUTPUT_WRT_SEL |
+				    TEXOP_OUTPUT_CURRENT |
+				    DISABLE_TEX_CNTRL_STAGE |
+				    TEXOP_SCALE_1X |
+				    TEXOP_MODIFY_PARMS |
+				    TEXOP_LAST_STAGE |
+				    TEXBLENDOP_ARG1);
+      sarea->TexBlendState[0][1] = (STATE3D_MAP_BLEND_OP_CMD(0) |
+				    TEXPIPE_ALPHA |
+				    ENABLE_TEXOUTPUT_WRT_SEL |
+				    TEXOP_OUTPUT_CURRENT |
+				    TEXOP_SCALE_1X |
+				    TEXOP_MODIFY_PARMS |
+				    TEXBLENDOP_ARG1);
+      sarea->TexBlendState[0][2] = (STATE3D_MAP_BLEND_ARG_CMD(0) |
+				    TEXPIPE_COLOR |
+				    TEXBLEND_ARG1 |
+				    TEXBLENDARG_MODIFY_PARMS |
+				    TEXBLENDARG_CURRENT);
+      sarea->TexBlendState[0][3] = (STATE3D_MAP_BLEND_ARG_CMD(0) |
+				    TEXPIPE_ALPHA |
+				    TEXBLEND_ARG2 |
+				    TEXBLENDARG_MODIFY_PARMS |
+				    TEXBLENDARG_CURRENT);
+      sarea->TexBlendStateWordsUsed[0] = 4;
+
+      sarea->ContextState[I830_CTXREG_ENABLES_1] |= (ENABLE_STENCIL_TEST |
+						     ENABLE_DEPTH_TEST);
+
+      sarea->ContextState[I830_CTXREG_ENABLES_2] &= ~(ENABLE_STENCIL_WRITE |
+						     ENABLE_DEPTH_WRITE |
+						     ENABLE_COLOR_WRITE);
+
+      sarea->ContextState[I830_CTXREG_ENABLES_2] |= 
+	 (ENABLE_STENCIL_WRITE |
+	  DISABLE_DEPTH_WRITE |
+	  (1 << WRITEMASK_RED_SHIFT) |
+	  (1 << WRITEMASK_GREEN_SHIFT) |
+	  (1 << WRITEMASK_BLUE_SHIFT) |
+	  (1 << WRITEMASK_ALPHA_SHIFT) |
+	  ENABLE_COLOR_WRITE);
+
+      sarea->ContextState[I830_CTXREG_STATE4] &= 
+	 ~MODE4_ENABLE_STENCIL_WRITE_MASK;
+
+      sarea->ContextState[I830_CTXREG_STATE4] |= 
+	 (ENABLE_STENCIL_WRITE_MASK |
+	  STENCIL_WRITE_MASK(s_mask));
+
+      sarea->ContextState[I830_CTXREG_STENCILTST] &= 
+	 ~(STENCIL_OPS_MASK |
+	   STENCIL_REF_VALUE_MASK |
+	   ENABLE_STENCIL_TEST_FUNC_MASK);
+
+      sarea->ContextState[I830_CTXREG_STENCILTST] |= 
+	 (ENABLE_STENCIL_PARMS |
+	  ENABLE_STENCIL_REF_VALUE |
+	  ENABLE_STENCIL_TEST_FUNC |
+	  STENCIL_FAIL_OP(STENCILOP_REPLACE) |
+	  STENCIL_PASS_DEPTH_FAIL_OP(STENCILOP_REPLACE) |
+	  STENCIL_PASS_DEPTH_PASS_OP(STENCILOP_REPLACE) |
+	  STENCIL_REF_VALUE((ctx->Stencil.Clear & 0xff)) |
+	  STENCIL_TEST_FUNC(COMPAREFUNC_ALWAYS));
+
+      if(0) 
+	fprintf(stderr, "Enables_1 (0x%x) Enables_2 (0x%x) StenTst (0x%x)\n"
+		"Modes_4 (0x%x)\n",
+		sarea->ContextState[I830_CTXREG_ENABLES_1],
+		sarea->ContextState[I830_CTXREG_ENABLES_2],
+		sarea->ContextState[I830_CTXREG_STENCILTST],
+		sarea->ContextState[I830_CTXREG_STATE4]);
+
+      sarea->BufferState[I830_DESTREG_CBUFADDR] = i830Screen->fbOffset;
+      
+      i830ClearDrawQuad(imesa, (float)x0, (float)x1, (float)y0, (float)y1,
+			   255, 255, 255, 255);
+      i830FlushPrimsLocked( imesa );
+   }
+
+   UNLOCK_HARDWARE(imesa);
+   imesa->dirty = old_dirty;
+   imesa->dirty |= (I830_UPLOAD_CTX |
+		    I830_UPLOAD_BUFFERS |
+		    I830_UPLOAD_TEXBLEND0);
+
+   imesa->hw_primitive = old_vertex_prim;
+}
+
+static void i830Clear(GLcontext *ctx, GLbitfield mask, GLboolean all,
+		      GLint cx1, GLint cy1, GLint cw, GLint ch)
+{
+   i830ContextPtr imesa = I830_CONTEXT( ctx );
+   __DRIdrawablePrivate *dPriv = imesa->driDrawable;
+   const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask);
+   drmI830Clear clear;
+   GLbitfield tri_mask = 0;
+   int i;
+   GLint cx, cy;
+
+   /* flip top to bottom */
+   cy = dPriv->h-cy1-ch;
+   cx = cx1 + imesa->drawX;
+   cy += imesa->drawY;
+
+   if(0) fprintf(stderr, "\nClearColor : 0x%08x\n", imesa->ClearColor);
+   
+   clear.flags = 0;
+   clear.clear_color = imesa->ClearColor;
+   clear.clear_depth = 0;
+   clear.clear_colormask = 0;
+   clear.clear_depthmask = 0;
+
+   I830_FIREVERTICES( imesa );
+
+   if (mask & DD_FRONT_LEFT_BIT) {
+      if(colorMask == ~0) {
+	 clear.flags |= I830_FRONT;
+      } else {
+	 tri_mask |= DD_FRONT_LEFT_BIT;
+      }
+      mask &= ~DD_FRONT_LEFT_BIT;
+   }
+
+   if (mask & DD_BACK_LEFT_BIT) {
+      if(colorMask == ~0) {
+	 clear.flags |= I830_BACK;
+      } else {
+	 tri_mask |= DD_BACK_LEFT_BIT;
+      }
+      mask &= ~DD_BACK_LEFT_BIT;
+   }
+
+   if (mask & DD_DEPTH_BIT) {
+      clear.flags |= I830_DEPTH;
+      clear.clear_depthmask = imesa->depth_clear_mask;
+      clear.clear_depth = (GLuint)(ctx->Depth.Clear * imesa->ClearDepth);
+      mask &= ~DD_DEPTH_BIT;
+   }
+
+   if((mask & DD_STENCIL_BIT) && imesa->hw_stencil) {
+      if (ctx->Stencil.WriteMask[0] != 0xff) {
+	 tri_mask |= DD_STENCIL_BIT;
+      } else {
+	 clear.flags |= I830_DEPTH;
+	 clear.clear_depthmask |= imesa->stencil_clear_mask;
+	 clear.clear_depth |= (ctx->Stencil.Clear & 0xff) << 24;
+      }
+      mask &= ~DD_STENCIL_BIT;
+   }
+
+   /* First check for clears that need to happen with triangles */
+   if(tri_mask) {
+      i830ClearWithTris(ctx, tri_mask, all, cx, cy, cw, ch);
+   }
+
+   if (clear.flags) {
+      LOCK_HARDWARE( imesa );
+
+      for (i = 0 ; i < imesa->numClipRects ; ) 
+      { 	 
+	 int nr = MIN2(i + I830_NR_SAREA_CLIPRECTS, imesa->numClipRects);
+	 XF86DRIClipRectRec *box = imesa->pClipRects;	 
+	 drm_clip_rect_t *b = (drm_clip_rect_t *)imesa->sarea->boxes;
+	 int n = 0;
+
+	 if (!all) {
+	    for ( ; i < nr ; i++) {
+	       GLint x = box[i].x1;
+	       GLint y = box[i].y1;
+	       GLint w = box[i].x2 - x;
+	       GLint h = box[i].y2 - y;
+
+	       if (x < cx) w -= cx - x, x = cx; 
+	       if (y < cy) h -= cy - y, y = cy;
+	       if (x + w > cx + cw) w = cx + cw - x;
+	       if (y + h > cy + ch) h = cy + ch - y;
+	       if (w <= 0) continue;
+	       if (h <= 0) continue;
+
+	       b->x1 = x;
+	       b->y1 = y;
+	       b->x2 = x + w;
+	       b->y2 = y + h;
+	       b++;
+	       n++;
+	    }
+	 } else {
+	    for ( ; i < nr ; i++) {
+	       *b++ = *(drm_clip_rect_t *)&box[i];
+	       n++;
+	    }
+	 }
+
+	 imesa->sarea->nbox = n;
+	 drmCommandWrite(imesa->driFd, DRM_I830_CLEAR,
+			 &clear, sizeof(drmI830Clear));
+      }
+
+      UNLOCK_HARDWARE( imesa );
+      imesa->upload_cliprects = GL_TRUE;
+   }
+
+   if (mask)
+      _swrast_Clear( ctx, mask, all, cx1, cy1, cw, ch );
+}
+
+
+
+/*
+ * Copy the back buffer to the front buffer. 
+ */
+void i830CopyBuffer( const __DRIdrawablePrivate *dPriv ) 
+{
+   i830ContextPtr imesa;
+   XF86DRIClipRectPtr pbox;
+   int nbox, i, tmp;
+
+   assert(dPriv);
+   assert(dPriv->driContextPriv);
+   assert(dPriv->driContextPriv->driverPrivate);
+
+   imesa = (i830ContextPtr) dPriv->driContextPriv->driverPrivate;
+
+   I830_FIREVERTICES( imesa );
+   LOCK_HARDWARE( imesa );
+
+   imesa->sarea->perf_boxes |= imesa->perf_boxes;
+   imesa->perf_boxes = 0;
+
+   pbox = dPriv->pClipRects;
+   nbox = dPriv->numClipRects;
+
+   for (i = 0 ; i < nbox ; )
+   {
+      int nr = MIN2(i + I830_NR_SAREA_CLIPRECTS, dPriv->numClipRects);
+      XF86DRIClipRectRec *b = (XF86DRIClipRectRec *)imesa->sarea->boxes;
+
+      imesa->sarea->nbox = nr - i;
+
+      for ( ; i < nr ; i++) 
+	 *b++ = pbox[i];
+      drmCommandNone(imesa->driFd, DRM_I830_SWAP);
+   }
+
+   tmp = GET_ENQUEUE_AGE(imesa);
+   UNLOCK_HARDWARE( imesa );
+
+   /* multiarb will suck the life out of the server without this throttle:
+    */
+   if (GET_DISPATCH_AGE(imesa) < imesa->lastSwap) {
+      i830WaitAge(imesa, imesa->lastSwap);
+   }
+
+   imesa->lastSwap = tmp;
+   imesa->upload_cliprects = GL_TRUE;
+}
+
+/* Flip the front & back buffes
+ */
+void i830PageFlip( const __DRIdrawablePrivate *dPriv )
+{
+#if 0
+   i830ContextPtr imesa;
+   int tmp, ret;
+
+   if (I830_DEBUG & DEBUG_IOCTL)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+   assert(dPriv);
+   assert(dPriv->driContextPriv);
+   assert(dPriv->driContextPriv->driverPrivate);
+
+   imesa = (i830ContextPtr) dPriv->driContextPriv->driverPrivate;
+
+   I830_FIREVERTICES( imesa );
+   LOCK_HARDWARE( imesa );
+
+   imesa->sarea->perf_boxes |= imesa->perf_boxes;
+   imesa->perf_boxes = 0;
+
+   if (dPriv->pClipRects) {
+      *(XF86DRIClipRectRec *)imesa->sarea->boxes = dPriv->pClipRects[0];
+      imesa->sarea->nbox = 1;
+   }
+
+   ret = drmCommandNone(imesa->driFd, DRM_I830_FLIP); 
+   if (ret) {
+      fprintf(stderr, "%s: %d\n", __FUNCTION__, ret);
+      UNLOCK_HARDWARE( imesa );
+      exit(1);
+   }
+
+   tmp = GET_ENQUEUE_AGE(imesa);
+   UNLOCK_HARDWARE( imesa );
+
+   /* multiarb will suck the life out of the server without this throttle:
+    */
+   if (GET_DISPATCH_AGE(imesa) < imesa->lastSwap) {
+      i830WaitAge(imesa, imesa->lastSwap);
+   }
+
+   i830SetDrawBuffer( imesa->glCtx, imesa->glCtx->Color.DriverDrawBuffer );
+   imesa->upload_cliprects = GL_TRUE;
+   imesa->lastSwap = tmp;
+#endif
+}
+
+/* This waits for *everybody* to finish rendering -- overkill.
+ */
+void i830DmaFinish( i830ContextPtr imesa  )
+{
+   I830_FIREVERTICES( imesa );
+   LOCK_HARDWARE_QUIESCENT( imesa );
+   UNLOCK_HARDWARE( imesa );
+}
+
+void i830RegetLockQuiescent( i830ContextPtr imesa )
+{
+   drmUnlock(imesa->driFd, imesa->hHWContext);
+   i830GetLock( imesa, DRM_LOCK_QUIESCENT );
+}
+
+void i830WaitAgeLocked( i830ContextPtr imesa, int age )
+{
+   int i = 0;
+   while (++i < 5000) {
+      drmCommandNone(imesa->driFd, DRM_I830_GETAGE);
+      if (GET_DISPATCH_AGE(imesa) >= age) return;
+      imesa->sarea->perf_boxes |= I830_BOX_WAIT;
+      UNLOCK_HARDWARE( imesa );
+      if (I830_DEBUG & DEBUG_SLEEP) fprintf(stderr, ".");
+      usleep(1);
+      LOCK_HARDWARE( imesa );
+   }
+   /* If that didn't work, just do a flush:
+    */
+   drmCommandNone(imesa->driFd, DRM_I830_FLUSH); 
+}
+
+void i830WaitAge( i830ContextPtr imesa, int age  ) 
+{
+   int i = 0;
+   if (GET_DISPATCH_AGE(imesa) >= age) return;
+
+   while (1) {
+      drmCommandNone(imesa->driFd, DRM_I830_GETAGE);
+      if (GET_DISPATCH_AGE(imesa) >= age) return;
+      imesa->perf_boxes |= I830_BOX_WAIT;
+
+      if (imesa->do_irqs) {
+	 drmI830IrqEmit ie;
+	 drmI830IrqWait iw;
+	 int ret;
+      
+	 ie.irq_seq = &iw.irq_seq;
+	 
+	 LOCK_HARDWARE( imesa ); 
+	 ret = drmCommandWriteRead( imesa->driFd, DRM_I830_IRQ_EMIT, &ie, sizeof(ie) );
+	 if ( ret ) {
+	    fprintf( stderr, "%s: drmI830IrqEmit: %d\n", __FUNCTION__, ret );
+	    exit(1);
+	 }
+	 UNLOCK_HARDWARE(imesa);
+	 
+	 ret = drmCommandWrite( imesa->driFd, DRM_I830_IRQ_WAIT, &iw, sizeof(iw) );
+	 if ( ret ) {
+	    fprintf( stderr, "%s: drmI830IrqWait: %d\n", __FUNCTION__, ret );
+	    exit(1);
+	 }
+      } else {
+	 if (++i > 5000) usleep(1); 
+      }
+   }
+}
+
+static void age_imesa( i830ContextPtr imesa, int age )
+{
+   if (imesa->CurrentTexObj[0]) imesa->CurrentTexObj[0]->base.timestamp = age;
+   if (imesa->CurrentTexObj[1]) imesa->CurrentTexObj[1]->base.timestamp = age;
+}
+
+void i830FlushPrimsLocked( i830ContextPtr imesa )
+{
+   XF86DRIClipRectPtr pbox = (XF86DRIClipRectPtr)imesa->pClipRects;
+   int nbox = imesa->numClipRects;
+   drmBufPtr buffer = imesa->vertex_buffer;
+   I830SAREAPtr sarea = imesa->sarea;
+   drmI830Vertex vertex;
+   int i, nr;
+
+   if (I830_DEBUG & DEBUG_IOCTL) 
+      fprintf(stderr, "%s dirty: %08x\n", __FUNCTION__, imesa->dirty);
+
+
+   vertex.idx = buffer->idx;
+   vertex.used = imesa->vertex_low;
+   vertex.discard = 0;
+   sarea->vertex_prim = imesa->hw_primitive;
+
+   /* Reset imesa vars:
+    */
+   imesa->vertex_buffer = 0;
+   imesa->vertex_addr = 0;
+   imesa->vertex_low = 0;
+   imesa->vertex_high = 0;
+   imesa->vertex_last_prim = 0;
+
+   if (imesa->dirty) {
+      if (I830_DEBUG & DEBUG_SANITY)
+	 i830EmitHwStateLockedDebug(imesa);
+      else
+	 i830EmitHwStateLocked(imesa);
+   }
+
+   if (I830_DEBUG & DEBUG_IOCTL)
+      fprintf(stderr,"%s: Vertex idx %d used %d discard %d\n", 
+	      __FUNCTION__, vertex.idx, vertex.used, vertex.discard);
+
+   if (!nbox) {
+      vertex.used = 0;
+      vertex.discard = 1;
+      if (drmCommandWrite (imesa->driFd, DRM_I830_VERTEX, 
+			   &vertex, sizeof(drmI830Vertex))) {
+	 fprintf(stderr, "DRM_I830_VERTEX: %d\n",  -errno);
+	 UNLOCK_HARDWARE(imesa);
+	 exit(1);
+      }
+      return;
+   }
+
+   for (i = 0 ; i < nbox ; i = nr ) {
+      XF86DRIClipRectPtr b = sarea->boxes;
+      int j;
+
+      nr = MIN2(i + I830_NR_SAREA_CLIPRECTS, nbox);
+      sarea->nbox = nr - i;
+
+      for ( j = i ; j < nr ; j++) {
+	 b[j-i] = pbox[j];
+      }
+
+      /* Finished with the buffer?
+       */
+      if (nr == nbox)
+	 vertex.discard = 1;
+
+      /* Do a bunch of sanity checks on the vertices sent to the hardware */
+      if (I830_DEBUG & DEBUG_SANITY) {
+	 i830VertexSanity(imesa, vertex);
+      
+	 for ( j = 0 ; j < sarea->nbox ; j++) {
+	    fprintf(stderr, "box %d/%d %d,%d %d,%d\n",
+		    j, sarea->nbox, b[j].x1, b[j].y1, b[j].x2, b[j].y2);
+	 }
+      }
+
+      drmCommandWrite (imesa->driFd, DRM_I830_VERTEX, 
+		       &vertex, sizeof(drmI830Vertex));
+      age_imesa(imesa, imesa->sarea->last_enqueue);
+   }
+
+   imesa->dirty = 0;
+   imesa->upload_cliprects = GL_FALSE;
+}
+
+void i830FlushPrimsGetBufferLocked( i830ContextPtr imesa )
+{
+   if (imesa->vertex_buffer)
+     i830FlushPrimsLocked( imesa );
+   imesa->vertex_buffer = i830_get_buffer_ioctl( imesa );
+   imesa->vertex_addr = (char *)imesa->vertex_buffer->address;
+
+   /* leave room for instruction header & footer:
+    */
+   imesa->vertex_high = imesa->vertex_buffer->total - 4; 
+   imesa->vertex_low = 4;	
+   imesa->vertex_last_prim = imesa->vertex_low;
+}
+
+void i830FlushPrimsGetBuffer( i830ContextPtr imesa )
+{
+   LOCK_HARDWARE(imesa);
+   i830FlushPrimsGetBufferLocked( imesa );
+   UNLOCK_HARDWARE(imesa);
+}
+
+
+void i830FlushPrims( i830ContextPtr imesa )
+{
+   if (imesa->vertex_buffer) {
+      LOCK_HARDWARE( imesa );
+      i830FlushPrimsLocked( imesa );
+      UNLOCK_HARDWARE( imesa );
+   }
+}
+
+int i830_check_copy(int fd)
+{
+   return drmCommandNone(fd, DRM_I830_DOCOPY);
+}
+
+static void i830DDFlush( GLcontext *ctx )
+{
+   i830ContextPtr imesa = I830_CONTEXT( ctx );
+   I830_FIREVERTICES( imesa );
+}
+
+static void i830DDFinish( GLcontext *ctx  ) 
+{
+   i830ContextPtr imesa = I830_CONTEXT( ctx );
+   i830DmaFinish( imesa );
+}
+
+void i830DDInitIoctlFuncs( GLcontext *ctx )
+{
+   ctx->Driver.Flush = i830DDFlush;
+   ctx->Driver.Clear = i830Clear;
+   ctx->Driver.Finish = i830DDFinish;
+}
+