i965g: re-starting from the dri driver

1 files changed, 493 insertions, 0 deletions

diff --git a/src/gallium/drivers/i965/brw_draw.c b/src/gallium/drivers/i965/brw_draw.c
new file mode 100644
index 00000000000..44bb7bd5882
--- /dev/null
+++ b/src/gallium/drivers/i965/brw_draw.c
@@ -0,0 +1,493 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 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 TUNGSTEN GRAPHICS AND/OR ITS 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.
+ * 
+ **************************************************************************/
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/state.h"
+#include "main/enums.h"
+#include "tnl/tnl.h"
+#include "vbo/vbo_context.h"
+#include "swrast/swrast.h"
+#include "swrast_setup/swrast_setup.h"
+
+#include "brw_draw.h"
+#include "brw_defines.h"
+#include "brw_context.h"
+#include "brw_state.h"
+#include "brw_fallback.h"
+
+#include "intel_batchbuffer.h"
+#include "intel_buffer_objects.h"
+
+#define FILE_DEBUG_FLAG DEBUG_BATCH
+
+static GLuint prim_to_hw_prim[GL_POLYGON+1] = {
+   _3DPRIM_POINTLIST,
+   _3DPRIM_LINELIST,
+   _3DPRIM_LINELOOP,
+   _3DPRIM_LINESTRIP,
+   _3DPRIM_TRILIST,
+   _3DPRIM_TRISTRIP,
+   _3DPRIM_TRIFAN,
+   _3DPRIM_QUADLIST,
+   _3DPRIM_QUADSTRIP,
+   _3DPRIM_POLYGON
+};
+
+
+static const GLenum reduced_prim[GL_POLYGON+1] = {  
+   GL_POINTS,
+   GL_LINES,
+   GL_LINES,
+   GL_LINES,
+   GL_TRIANGLES,
+   GL_TRIANGLES,
+   GL_TRIANGLES,
+   GL_TRIANGLES,
+   GL_TRIANGLES,
+   GL_TRIANGLES
+};
+
+
+/* When the primitive changes, set a state bit and re-validate.  Not
+ * the nicest and would rather deal with this by having all the
+ * programs be immune to the active primitive (ie. cope with all
+ * possibilities).  That may not be realistic however.
+ */
+static GLuint brw_set_prim(struct brw_context *brw, GLenum prim)
+{
+   GLcontext *ctx = &brw->intel.ctx;
+
+   if (INTEL_DEBUG & DEBUG_PRIMS)
+      _mesa_printf("PRIM: %s\n", _mesa_lookup_enum_by_nr(prim));
+   
+   /* Slight optimization to avoid the GS program when not needed:
+    */
+   if (prim == GL_QUAD_STRIP &&
+       ctx->Light.ShadeModel != GL_FLAT &&
+       ctx->Polygon.FrontMode == GL_FILL &&
+       ctx->Polygon.BackMode == GL_FILL)
+      prim = GL_TRIANGLE_STRIP;
+
+   if (prim != brw->primitive) {
+      brw->primitive = prim;
+      brw->state.dirty.brw |= BRW_NEW_PRIMITIVE;
+
+      if (reduced_prim[prim] != brw->intel.reduced_primitive) {
+	 brw->intel.reduced_primitive = reduced_prim[prim];
+	 brw->state.dirty.brw |= BRW_NEW_REDUCED_PRIMITIVE;
+      }
+   }
+
+   return prim_to_hw_prim[prim];
+}
+
+
+static GLuint trim(GLenum prim, GLuint length)
+{
+   if (prim == GL_QUAD_STRIP)
+      return length > 3 ? (length - length % 2) : 0;
+   else if (prim == GL_QUADS)
+      return length - length % 4;
+   else 
+      return length;
+}
+
+
+static void brw_emit_prim(struct brw_context *brw,
+			  const struct _mesa_prim *prim,
+			  uint32_t hw_prim)
+{
+   struct brw_3d_primitive prim_packet;
+   struct intel_context *intel = &brw->intel;
+
+   if (INTEL_DEBUG & DEBUG_PRIMS)
+      _mesa_printf("PRIM: %s %d %d\n", _mesa_lookup_enum_by_nr(prim->mode), 
+		   prim->start, prim->count);
+
+   prim_packet.header.opcode = CMD_3D_PRIM;
+   prim_packet.header.length = sizeof(prim_packet)/4 - 2;
+   prim_packet.header.pad = 0;
+   prim_packet.header.topology = hw_prim;
+   prim_packet.header.indexed = prim->indexed;
+
+   prim_packet.verts_per_instance = trim(prim->mode, prim->count);
+   prim_packet.start_vert_location = prim->start;
+   if (prim->indexed)
+      prim_packet.start_vert_location += brw->ib.start_vertex_offset;
+   prim_packet.instance_count = 1;
+   prim_packet.start_instance_location = 0;
+   prim_packet.base_vert_location = prim->basevertex;
+
+   /* Can't wrap here, since we rely on the validated state. */
+   brw->no_batch_wrap = GL_TRUE;
+
+   /* If we're set to always flush, do it before and after the primitive emit.
+    * We want to catch both missed flushes that hurt instruction/state cache
+    * and missed flushes of the render cache as it heads to other parts of
+    * the besides the draw code.
+    */
+   if (intel->always_flush_cache) {
+      BEGIN_BATCH(1, IGNORE_CLIPRECTS);
+      OUT_BATCH(intel->vtbl.flush_cmd());
+      ADVANCE_BATCH();
+   }
+   if (prim_packet.verts_per_instance) {
+      intel_batchbuffer_data( brw->intel.batch, &prim_packet,
+			      sizeof(prim_packet), LOOP_CLIPRECTS);
+   }
+   if (intel->always_flush_cache) {
+      BEGIN_BATCH(1, IGNORE_CLIPRECTS);
+      OUT_BATCH(intel->vtbl.flush_cmd());
+      ADVANCE_BATCH();
+   }
+
+   brw->no_batch_wrap = GL_FALSE;
+}
+
+static void brw_merge_inputs( struct brw_context *brw,
+		       const struct gl_client_array *arrays[])
+{
+   struct brw_vertex_info old = brw->vb.info;
+   GLuint i;
+
+   for (i = 0; i < VERT_ATTRIB_MAX; i++)
+      dri_bo_unreference(brw->vb.inputs[i].bo);
+
+   memset(&brw->vb.inputs, 0, sizeof(brw->vb.inputs));
+   memset(&brw->vb.info, 0, sizeof(brw->vb.info));
+
+   for (i = 0; i < VERT_ATTRIB_MAX; i++) {
+      brw->vb.inputs[i].glarray = arrays[i];
+      brw->vb.inputs[i].attrib = (gl_vert_attrib) i;
+
+      if (arrays[i]->StrideB != 0)
+	 brw->vb.info.sizes[i/16] |= (brw->vb.inputs[i].glarray->Size - 1) <<
+	    ((i%16) * 2);
+   }
+
+   /* Raise statechanges if input sizes have changed. */
+   if (memcmp(brw->vb.info.sizes, old.sizes, sizeof(old.sizes)) != 0)
+      brw->state.dirty.brw |= BRW_NEW_INPUT_DIMENSIONS;
+}
+
+/* XXX: could split the primitive list to fallback only on the
+ * non-conformant primitives.
+ */
+static GLboolean check_fallbacks( struct brw_context *brw,
+				  const struct _mesa_prim *prim,
+				  GLuint nr_prims )
+{
+   GLcontext *ctx = &brw->intel.ctx;
+   GLuint i;
+
+   /* If we don't require strict OpenGL conformance, never 
+    * use fallbacks.  If we're forcing fallbacks, always
+    * use fallfacks.
+    */
+   if (brw->intel.conformance_mode == 0)
+      return GL_FALSE;
+
+   if (brw->intel.conformance_mode == 2)
+      return GL_TRUE;
+
+   if (ctx->Polygon.SmoothFlag) {
+      for (i = 0; i < nr_prims; i++)
+	 if (reduced_prim[prim[i].mode] == GL_TRIANGLES) 
+	    return GL_TRUE;
+   }
+
+   /* BRW hardware will do AA lines, but they are non-conformant it
+    * seems.  TBD whether we keep this fallback:
+    */
+   if (ctx->Line.SmoothFlag) {
+      for (i = 0; i < nr_prims; i++)
+	 if (reduced_prim[prim[i].mode] == GL_LINES) 
+	    return GL_TRUE;
+   }
+
+   /* Stipple -- these fallbacks could be resolved with a little
+    * bit of work?
+    */
+   if (ctx->Line.StippleFlag) {
+      for (i = 0; i < nr_prims; i++) {
+	 /* GS doesn't get enough information to know when to reset
+	  * the stipple counter?!?
+	  */
+	 if (prim[i].mode == GL_LINE_LOOP || prim[i].mode == GL_LINE_STRIP) 
+	    return GL_TRUE;
+	    
+	 if (prim[i].mode == GL_POLYGON &&
+	     (ctx->Polygon.FrontMode == GL_LINE ||
+	      ctx->Polygon.BackMode == GL_LINE))
+	    return GL_TRUE;
+      }
+   }
+
+   if (ctx->Point.SmoothFlag) {
+      for (i = 0; i < nr_prims; i++)
+	 if (prim[i].mode == GL_POINTS) 
+	    return GL_TRUE;
+   }
+
+   /* BRW hardware doesn't handle GL_CLAMP texturing correctly;
+    * brw_wm_sampler_state:translate_wrap_mode() treats GL_CLAMP
+    * as GL_CLAMP_TO_EDGE instead.  If we're using GL_CLAMP, and
+    * we want strict conformance, force the fallback.
+    * Right now, we only do this for 2D textures.
+    */
+   {
+      int u;
+      for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) {
+         struct gl_texture_unit *texUnit = &ctx->Texture.Unit[u];
+         if (texUnit->Enabled) {
+            if (texUnit->Enabled & TEXTURE_1D_BIT) {
+               if (texUnit->CurrentTex[TEXTURE_1D_INDEX]->WrapS == GL_CLAMP) {
+                   return GL_TRUE;
+               }
+            }
+            if (texUnit->Enabled & TEXTURE_2D_BIT) {
+               if (texUnit->CurrentTex[TEXTURE_2D_INDEX]->WrapS == GL_CLAMP ||
+                   texUnit->CurrentTex[TEXTURE_2D_INDEX]->WrapT == GL_CLAMP) {
+                   return GL_TRUE;
+               }
+            }
+            if (texUnit->Enabled & TEXTURE_3D_BIT) {
+               if (texUnit->CurrentTex[TEXTURE_3D_INDEX]->WrapS == GL_CLAMP ||
+                   texUnit->CurrentTex[TEXTURE_3D_INDEX]->WrapT == GL_CLAMP ||
+                   texUnit->CurrentTex[TEXTURE_3D_INDEX]->WrapR == GL_CLAMP) {
+                   return GL_TRUE;
+               }
+            }
+         }
+      }
+   }
+      
+   /* Nothing stopping us from the fast path now */
+   return GL_FALSE;
+}
+
+/* May fail if out of video memory for texture or vbo upload, or on
+ * fallback conditions.
+ */
+static GLboolean brw_try_draw_prims( GLcontext *ctx,
+				     const struct gl_client_array *arrays[],
+				     const struct _mesa_prim *prim,
+				     GLuint nr_prims,
+				     const struct _mesa_index_buffer *ib,
+				     GLuint min_index,
+				     GLuint max_index )
+{
+   struct intel_context *intel = intel_context(ctx);
+   struct brw_context *brw = brw_context(ctx);
+   GLboolean retval = GL_FALSE;
+   GLboolean warn = GL_FALSE;
+   GLboolean first_time = GL_TRUE;
+   GLuint i;
+
+   if (ctx->NewState)
+      _mesa_update_state( ctx );
+
+   /* We have to validate the textures *before* checking for fallbacks;
+    * otherwise, the software fallback won't be able to rely on the
+    * texture state, the firstLevel and lastLevel fields won't be
+    * set in the intel texture object (they'll both be 0), and the 
+    * software fallback will segfault if it attempts to access any
+    * texture level other than level 0.
+    */
+   brw_validate_textures( brw );
+
+   if (check_fallbacks(brw, prim, nr_prims))
+      return GL_FALSE;
+
+   /* Bind all inputs, derive varying and size information:
+    */
+   brw_merge_inputs( brw, arrays );
+
+   brw->ib.ib = ib;
+   brw->state.dirty.brw |= BRW_NEW_INDICES;
+
+   brw->vb.min_index = min_index;
+   brw->vb.max_index = max_index;
+   brw->state.dirty.brw |= BRW_NEW_VERTICES;
+
+   /* Have to validate state quite late.  Will rebuild tnl_program,
+    * which depends on varying information.  
+    * 
+    * Note this is where brw->vs->prog_data.inputs_read is calculated,
+    * so can't access it earlier.
+    */
+
+   LOCK_HARDWARE(intel);
+
+   if (!intel->constant_cliprect && intel->driDrawable->numClipRects == 0) {
+      UNLOCK_HARDWARE(intel);
+      return GL_TRUE;
+   }
+
+   for (i = 0; i < nr_prims; i++) {
+      uint32_t hw_prim;
+
+      /* Flush the batch if it's approaching full, so that we don't wrap while
+       * we've got validated state that needs to be in the same batch as the
+       * primitives.  This fraction is just a guess (minimal full state plus
+       * a primitive is around 512 bytes), and would be better if we had
+       * an upper bound of how much we might emit in a single
+       * brw_try_draw_prims().
+       */
+      intel_batchbuffer_require_space(intel->batch, intel->batch->size / 4,
+				      LOOP_CLIPRECTS);
+
+      hw_prim = brw_set_prim(brw, prim[i].mode);
+
+      if (first_time || (brw->state.dirty.brw & BRW_NEW_PRIMITIVE)) {
+	 first_time = GL_FALSE;
+
+	 brw_validate_state(brw);
+
+	 /* Various fallback checks:  */
+	 if (brw->intel.Fallback)
+	    goto out;
+
+	 /* Check that we can fit our state in with our existing batchbuffer, or
+	  * flush otherwise.
+	  */
+	 if (dri_bufmgr_check_aperture_space(brw->state.validated_bos,
+					     brw->state.validated_bo_count)) {
+	    static GLboolean warned;
+	    intel_batchbuffer_flush(intel->batch);
+
+	    /* Validate the state after we flushed the batch (which would have
+	     * changed the set of dirty state).  If we still fail to
+	     * check_aperture, warn of what's happening, but attempt to continue
+	     * on since it may succeed anyway, and the user would probably rather
+	     * see a failure and a warning than a fallback.
+	     */
+	    brw_validate_state(brw);
+	    if (!warned &&
+		dri_bufmgr_check_aperture_space(brw->state.validated_bos,
+						brw->state.validated_bo_count)) {
+	       warn = GL_TRUE;
+	       warned = GL_TRUE;
+	    }
+	 }
+
+	 brw_upload_state(brw);
+      }
+
+      brw_emit_prim(brw, &prim[i], hw_prim);
+
+      retval = GL_TRUE;
+   }
+
+   if (intel->always_flush_batch)
+      intel_batchbuffer_flush(intel->batch);
+ out:
+   UNLOCK_HARDWARE(intel);
+
+   brw_state_cache_check_size(brw);
+
+   if (warn)
+      fprintf(stderr, "i965: Single primitive emit potentially exceeded "
+	      "available aperture space\n");
+
+   if (!retval)
+      DBG("%s failed\n", __FUNCTION__);
+
+   return retval;
+}
+
+void brw_draw_prims( GLcontext *ctx,
+		     const struct gl_client_array *arrays[],
+		     const struct _mesa_prim *prim,
+		     GLuint nr_prims,
+		     const struct _mesa_index_buffer *ib,
+		     GLboolean index_bounds_valid,
+		     GLuint min_index,
+		     GLuint max_index )
+{
+   GLboolean retval;
+
+   if (!vbo_all_varyings_in_vbos(arrays)) {
+      if (!index_bounds_valid)
+	 vbo_get_minmax_index(ctx, prim, ib, &min_index, &max_index);
+
+      /* Decide if we want to rebase.  If so we end up recursing once
+       * only into this function.
+       */
+      if (min_index != 0) {
+	 vbo_rebase_prims(ctx, arrays,
+			  prim, nr_prims,
+			  ib, min_index, max_index,
+			  brw_draw_prims );
+	 return;
+      }
+   }
+
+   /* Make a first attempt at drawing:
+    */
+   retval = brw_try_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
+
+   /* Otherwise, we really are out of memory.  Pass the drawing
+    * command to the software tnl module and which will in turn call
+    * swrast to do the drawing.
+    */
+   if (!retval) {
+       _swsetup_Wakeup(ctx);
+      _tnl_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
+   }
+
+}
+
+void brw_draw_init( struct brw_context *brw )
+{
+   GLcontext *ctx = &brw->intel.ctx;
+   struct vbo_context *vbo = vbo_context(ctx);
+
+   /* Register our drawing function: 
+    */
+   vbo->draw_prims = brw_draw_prims;
+}
+
+void brw_draw_destroy( struct brw_context *brw )
+{
+   int i;
+
+   if (brw->vb.upload.bo != NULL) {
+      dri_bo_unreference(brw->vb.upload.bo);
+      brw->vb.upload.bo = NULL;
+   }
+
+   for (i = 0; i < VERT_ATTRIB_MAX; i++) {
+      dri_bo_unreference(brw->vb.inputs[i].bo);
+      brw->vb.inputs[i].bo = NULL;
+   }
+
+   dri_bo_unreference(brw->ib.bo);
+   brw->ib.bo = NULL;
+}