i965: Initial Ivybridge SF/SBE state setup.

Copied from gen6_sf_state.c.

The main change from Sandybridge seems to be that 3DSTATE_SF was split
into two separate state packet commands: 3DSTATE_SF and 3DSTATE_SBE
("setup backend").  The bit-offsets are even the same - only the DWords
numbers have shuffled around a bit.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>

src/mesa/drivers/dri/i965/Makefile

@@ -97,6 +97,7 @@ DRIVER_SOURCES = \
 	gen6_viewport_state.c \
 	gen6_vs_state.c \
 	gen6_wm_state.c \
+	gen7_sf_state.c \
 	gen7_urb.c
 
 C_SOURCES = \

src/mesa/drivers/dri/i965/brw_defines.h

@@ -966,7 +966,7 @@
 # define GEN6_CLIP_FORCE_ZERO_RTAINDEX			(1 << 5)
 
 #define _3DSTATE_SF				0x7813 /* GEN6+ */
-/* DW1 */
+/* DW1 (for gen6) */
 # define GEN6_SF_NUM_OUTPUTS_SHIFT			22
 # define GEN6_SF_SWIZZLE_ENABLE				(1 << 21)
 # define GEN6_SF_POINT_SPRITE_LOWERLEFT			(1 << 20)
@@ -1042,6 +1042,27 @@
 /* DW18: attr 0-7 wrap shortest enables */
 /* DW19: attr 8-16 wrap shortest enables */
 
+/* On GEN7, many fields of 3DSTATE_SF were split out into a new command:
+ * 3DSTATE_SBE.  The remaining fields live in different DWords, but retain
+ * the same bit-offset.  The only new field:
+ */
+/* GEN7/DW1: */
+# define GEN7_SF_DEPTH_BUFFER_SURFACE_FORMAT_SHIFT	12
+
+#define _3DSTATE_SBE				0x781F /* GEN7+ */
+/* DW1 */
+# define GEN7_SBE_SWIZZLE_CONTROL_MODE			(1 << 28)
+# define GEN7_SBE_NUM_OUTPUTS_SHIFT			22
+# define GEN7_SBE_SWIZZLE_ENABLE			(1 << 21)
+# define GEN7_SBE_POINT_SPRITE_LOWERLEFT		(1 << 20)
+# define GEN7_SBE_URB_ENTRY_READ_LENGTH_SHIFT		11
+# define GEN7_SBE_URB_ENTRY_READ_OFFSET_SHIFT		4
+/* DW2-9: Attribute setup (same as DW8-15 of gen6 _3DSTATE_SF) */
+/* DW10: Point sprite texture coordinate enables */
+/* DW11: Constant interpolation enables */
+/* DW12: attr 0-7 wrap shortest enables */
+/* DW13: attr 8-16 wrap shortest enables */
+
 #define _3DSTATE_WM				0x7814 /* GEN6+ */
 /* DW1: kernel pointer */
 /* DW2 */

src/mesa/drivers/dri/i965/brw_state.h

@@ -111,6 +111,8 @@ extern const struct brw_tracked_state gen6_vs_constants;
 extern const struct brw_tracked_state gen6_vs_state;
 extern const struct brw_tracked_state gen6_wm_constants;
 extern const struct brw_tracked_state gen6_wm_state;
+extern const struct brw_tracked_state gen7_sbe_state;
+extern const struct brw_tracked_state gen7_sf_state;
 extern const struct brw_tracked_state gen7_urb;
 
 /***********************************************************************

src/mesa/drivers/dri/i965/brw_state_upload.c

@@ -213,7 +213,8 @@ const struct brw_tracked_state *gen7_atoms[] =
    &gen6_vs_state,
    &gen6_gs_state,
    &gen6_clip_state,
-   &gen6_sf_state,
+   &gen7_sbe_state,
+   &gen7_sf_state,
    &gen6_wm_state,
 
    &gen6_scissor_state,

src/mesa/drivers/dri/i965/gen7_sf_state.c

@@ -0,0 +1,264 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 "brw_context.h"
+#include "brw_state.h"
+#include "brw_defines.h"
+#include "brw_util.h"
+#include "main/macros.h"
+#include "intel_batchbuffer.h"
+
+static void
+upload_sbe_state(struct brw_context *brw)
+{
+   struct intel_context *intel = &brw->intel;
+   struct gl_context *ctx = &intel->ctx;
+   /* CACHE_NEW_VS_PROG */
+   uint32_t num_inputs = brw_count_bits(brw->vs.prog_data->outputs_written);
+   /* BRW_NEW_FRAGMENT_PROGRAM */
+   uint32_t num_outputs = brw_count_bits(brw->fragment_program->Base.InputsRead);
+   uint32_t dw1, dw10, dw11;
+   int i;
+   int attr = 0;
+   /* _NEW_TRANSFORM */
+   int urb_start = ctx->Transform.ClipPlanesEnabled ? 2 : 1;
+   /* _NEW_LIGHT */
+   int two_side_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
+
+   /* FINISHME: Attribute Swizzle Control Mode? */
+   dw1 =
+      GEN7_SBE_SWIZZLE_ENABLE |
+      num_outputs << GEN7_SBE_NUM_OUTPUTS_SHIFT |
+      (num_inputs + 1) / 2 << GEN7_SBE_URB_ENTRY_READ_LENGTH_SHIFT |
+      urb_start << GEN7_SBE_URB_ENTRY_READ_OFFSET_SHIFT;
+
+   /* _NEW_POINT */
+   if (ctx->Point.SpriteOrigin == GL_LOWER_LEFT)
+      dw1 |= GEN6_SF_POINT_SPRITE_LOWERLEFT;
+
+   dw10 = 0;
+   if (ctx->Point.PointSprite) {
+       for (i = 0; i < 8; i++) {
+	   if (ctx->Point.CoordReplace[i])
+	       dw10 |= (1 << i);
+       }
+   }
+
+   /* _NEW_LIGHT (flat shading) */
+   dw11 = 0;
+   if (ctx->Light.ShadeModel == GL_FLAT) {
+       dw11 |= ((brw->fragment_program->Base.InputsRead & (FRAG_BIT_COL0 | FRAG_BIT_COL1)) >>
+                ((brw->fragment_program->Base.InputsRead & FRAG_BIT_WPOS) ? 0 : 1));
+   }
+
+   BEGIN_BATCH(14);
+   OUT_BATCH(_3DSTATE_SBE << 16 | (14 - 2));
+   OUT_BATCH(dw1);
+
+   /* Output dwords 2 through 9 */
+   for (i = 0; i < 8; i++) {
+      uint32_t attr_overrides = 0;
+
+      for (; attr < 64; attr++) {
+	 if (brw->fragment_program->Base.InputsRead & BITFIELD64_BIT(attr)) {
+	    attr_overrides |= get_attr_override(brw, attr, two_side_color);
+	    attr++;
+	    break;
+	 }
+      }
+
+      for (; attr < 64; attr++) {
+	 if (brw->fragment_program->Base.InputsRead & BITFIELD64_BIT(attr)) {
+	    attr_overrides |= get_attr_override(brw, attr, two_side_color) << 16;
+	    attr++;
+	    break;
+	 }
+      }
+      OUT_BATCH(attr_overrides);
+   }
+
+   OUT_BATCH(dw10); /* point sprite texcoord bitmask */
+   OUT_BATCH(dw11); /* constant interp bitmask */
+   OUT_BATCH(0); /* wrapshortest enables 0-7 */
+   OUT_BATCH(0); /* wrapshortest enables 8-15 */
+   ADVANCE_BATCH();
+}
+
+const struct brw_tracked_state gen7_sbe_state = {
+   .dirty = {
+      .mesa  = (_NEW_LIGHT |
+		_NEW_POINT |
+		_NEW_TRANSFORM),
+      .brw   = (BRW_NEW_CONTEXT |
+		BRW_NEW_FRAGMENT_PROGRAM),
+      .cache = CACHE_NEW_VS_PROG
+   },
+   .emit = upload_sbe_state,
+};
+
+static void
+upload_sf_state(struct brw_context *brw)
+{
+   struct intel_context *intel = &brw->intel;
+   struct gl_context *ctx = &intel->ctx;
+   uint32_t dw1, dw2, dw3;
+   float point_size;
+   /* _NEW_BUFFERS */
+   bool render_to_fbo = brw->intel.ctx.DrawBuffer->Name != 0;
+
+   /* FINISHME: Depth Buffer Surface Format? */
+   dw1 = GEN6_SF_STATISTICS_ENABLE | GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
+
+   /* _NEW_POLYGON */
+   if ((ctx->Polygon.FrontFace == GL_CCW) ^ render_to_fbo)
+      dw1 |= GEN6_SF_WINDING_CCW;
+
+   if (ctx->Polygon.OffsetFill)
+       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
+
+   if (ctx->Polygon.OffsetLine)
+       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
+
+   if (ctx->Polygon.OffsetPoint)
+       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
+
+   switch (ctx->Polygon.FrontMode) {
+   case GL_FILL:
+       dw1 |= GEN6_SF_FRONT_SOLID;
+       break;
+
+   case GL_LINE:
+       dw1 |= GEN6_SF_FRONT_WIREFRAME;
+       break;
+
+   case GL_POINT:
+       dw1 |= GEN6_SF_FRONT_POINT;
+       break;
+
+   default:
+       assert(0);
+       break;
+   }
+
+   switch (ctx->Polygon.BackMode) {
+   case GL_FILL:
+       dw1 |= GEN6_SF_BACK_SOLID;
+       break;
+
+   case GL_LINE:
+       dw1 |= GEN6_SF_BACK_WIREFRAME;
+       break;
+
+   case GL_POINT:
+       dw1 |= GEN6_SF_BACK_POINT;
+       break;
+
+   default:
+       assert(0);
+       break;
+   }
+
+   dw2 = 0;
+
+   if (ctx->Polygon.CullFlag) {
+      switch (ctx->Polygon.CullFaceMode) {
+      case GL_FRONT:
+	 dw2 |= GEN6_SF_CULL_FRONT;
+	 break;
+      case GL_BACK:
+	 dw2 |= GEN6_SF_CULL_BACK;
+	 break;
+      case GL_FRONT_AND_BACK:
+	 dw2 |= GEN6_SF_CULL_BOTH;
+	 break;
+      default:
+	 assert(0);
+	 break;
+      }
+   } else {
+      dw2 |= GEN6_SF_CULL_NONE;
+   }
+
+   /* _NEW_SCISSOR */
+   if (ctx->Scissor.Enabled)
+      dw2 |= GEN6_SF_SCISSOR_ENABLE;
+
+   /* _NEW_LINE */
+   dw2 |= U_FIXED(CLAMP(ctx->Line.Width, 0.0, 7.99), 7) <<
+      GEN6_SF_LINE_WIDTH_SHIFT;
+   if (ctx->Line.SmoothFlag) {
+      dw2 |= GEN6_SF_LINE_AA_ENABLE;
+      dw2 |= GEN6_SF_LINE_AA_MODE_TRUE;
+      dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
+   }
+
+   /* FINISHME: Last Pixel Enable?  Vertex Sub Pixel Precision Select?
+    * FINISHME: AA Line Distance Mode?
+    */
+
+   dw3 = 0;
+
+   /* _NEW_POINT */
+   if (!(ctx->VertexProgram.PointSizeEnabled || ctx->Point._Attenuated))
+      dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
+
+   /* Clamp to ARB_point_parameters user limits */
+   point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
+
+   /* Clamp to the hardware limits and convert to fixed point */
+   dw3 |= U_FIXED(CLAMP(point_size, 0.125, 255.875), 3);
+
+   /* _NEW_LIGHT */
+   if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
+      dw3 |=
+	 (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
+	 (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
+	 (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
+   } else {
+      dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
+   }
+
+   BEGIN_BATCH(7);
+   OUT_BATCH(_3DSTATE_SF << 16 | (7 - 2));
+   OUT_BATCH(dw1);
+   OUT_BATCH(dw2);
+   OUT_BATCH(dw3);
+   OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant.  copied from gen4 */
+   OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
+   OUT_BATCH_F(0.0); /* XXX: global depth offset clamp */
+   ADVANCE_BATCH();
+}
+
+const struct brw_tracked_state gen7_sf_state = {
+   .dirty = {
+      .mesa  = (_NEW_LIGHT |
+		_NEW_POLYGON |
+		_NEW_LINE |
+		_NEW_SCISSOR |
+		_NEW_BUFFERS |
+		_NEW_POINT),
+      .brw   = BRW_NEW_CONTEXT,
+      .cache = CACHE_NEW_VS_PROG
+   },
+   .emit = upload_sf_state,
+};