i965: Replace general sw fallback support with a manual check for rendermode.

There were no other cases that set it any more.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

5 files changed, 14 insertions, 120 deletions

diff --git a/src/mesa/drivers/dri/i965/Makefile.sources b/src/mesa/drivers/dri/i965/Makefile.sources
index 334bfd9..d6d189a 100644
--- a/src/mesa/drivers/dri/i965/Makefile.sources
+++ b/src/mesa/drivers/dri/i965/Makefile.sources
@@ -47,7 +47,6 @@ i965_C_FILES = \
 	brw_eu_debug.c \
 	brw_eu_emit.c \
 	brw_eu_util.c \
-	brw_fallback.c \
 	brw_gs.c \
 	brw_gs_emit.c \
 	brw_gs_state.c \
diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index b335e96..4365770 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -491,12 +491,6 @@ retry:
       if (brw->state.dirty.brw) {
 	 intel->no_batch_wrap = true;
 	 brw_upload_state(brw);
-
-	 if (unlikely(brw->intel.Fallback)) {
-	    intel->no_batch_wrap = false;
-	    retval = false;
-	    goto out;
-	 }
       }
 
       if (intel->gen >= 7)
@@ -533,7 +527,6 @@ retry:
 
    if (intel->always_flush_batch)
       intel_batchbuffer_flush(intel);
- out:
 
    brw_state_cache_check_size(brw);
    brw_postdraw_set_buffers_need_resolve(brw);
@@ -551,7 +544,6 @@ void brw_draw_prims( struct gl_context *ctx,
 		     struct gl_transform_feedback_object *tfb_vertcount )
 {
    const struct gl_client_array **arrays = ctx->Array._DrawArrays;
-   bool retval;
 
    if (!_mesa_check_conditional_render(ctx))
       return;
@@ -578,20 +570,23 @@ void brw_draw_prims( struct gl_context *ctx,
       }
    }
 
-   /* 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.
+   /* Do GL_SELECT and GL_FEEDBACK rendering using swrast, even though it
+    * won't support all the extensions we support.
     */
-   if (!retval) {
-       _swsetup_Wakeup(ctx);
-       _tnl_wakeup(ctx);
+   if (ctx->RenderMode != GL_RENDER) {
+      perf_debug("%s render mode not supported in hardware\n",
+                 _mesa_lookup_enum_by_nr(ctx->RenderMode));
+      _swsetup_Wakeup(ctx);
+      _tnl_wakeup(ctx);
       _tnl_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
+      return;
    }
 
+   /* Try drawing with the hardware, but don't do anything else if we can't
+    * manage it.  swrast doesn't support our featureset, so we can't fall back
+    * to it.
+    */
+   brw_try_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
 }
 
 void brw_draw_init( struct brw_context *brw )
diff --git a/src/mesa/drivers/dri/i965/brw_fallback.c b/src/mesa/drivers/dri/i965/brw_fallback.c
deleted file mode 100644
index 691acfc..0000000
--- a/src/mesa/drivers/dri/i965/brw_fallback.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/**************************************************************************
- * 
- * Copyright 2005 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/enums.h"
-#include "main/imports.h"
-#include "main/macros.h"
-#include "main/mtypes.h"
-
-#include "swrast_setup/swrast_setup.h"
-#include "swrast/swrast.h"
-#include "tnl/tnl.h"
-#include "brw_context.h"
-
-#define FILE_DEBUG_FLAG DEBUG_PERF
-
-static bool do_check_fallback(struct brw_context *brw)
-{
-   struct gl_context *ctx = &brw->intel.ctx;
-
-   /* _NEW_RENDERMODE
-    */
-   if (ctx->RenderMode != GL_RENDER) {
-      DBG("FALLBACK: render mode\n");
-      return true;
-   }
-
-   return false;
-}
-
-static void check_fallback(struct brw_context *brw)
-{
-   brw->intel.Fallback = do_check_fallback(brw);
-}
-
-const struct brw_tracked_state brw_check_fallback = {
-   .dirty = {
-      .mesa = _NEW_RENDERMODE | _NEW_STENCIL,
-      .brw  = 0,
-      .cache = 0
-   },
-   .emit = check_fallback
-};
-
-
-
-
-/**
- * Called by the INTEL_FALLBACK() macro.
- * NOTE: this is a no-op for the i965 driver.  The brw->intel.Fallback
- * field is treated as a boolean, not a bitmask.  It's only set in a
- * couple of places.
- */
-void intelFallback( struct intel_context *intel, GLuint bit, bool mode )
-{
-}
-
-
-
diff --git a/src/mesa/drivers/dri/i965/brw_state.h b/src/mesa/drivers/dri/i965/brw_state.h
index 4e78fae..a80ee86 100644
--- a/src/mesa/drivers/dri/i965/brw_state.h
+++ b/src/mesa/drivers/dri/i965/brw_state.h
@@ -44,7 +44,6 @@ enum intel_msaa_layout;
 extern const struct brw_tracked_state brw_blend_constant_color;
 extern const struct brw_tracked_state brw_cc_vp;
 extern const struct brw_tracked_state brw_cc_unit;
-extern const struct brw_tracked_state brw_check_fallback;
 extern const struct brw_tracked_state brw_clip_prog;
 extern const struct brw_tracked_state brw_clip_unit;
 extern const struct brw_tracked_state brw_vs_pull_constants;
diff --git a/src/mesa/drivers/dri/i965/brw_state_upload.c b/src/mesa/drivers/dri/i965/brw_state_upload.c
index c3e6de4..7291988 100644
--- a/src/mesa/drivers/dri/i965/brw_state_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_state_upload.c
@@ -44,8 +44,6 @@
  */
 static const struct brw_tracked_state *gen4_atoms[] =
 {
-   &brw_check_fallback,
-
    &brw_wm_input_sizes,
    &brw_vs_prog, /* must do before GS prog, state base address. */
    &brw_gs_prog, /* must do before state base address */
@@ -111,8 +109,6 @@ static const struct brw_tracked_state *gen4_atoms[] =
 
 static const struct brw_tracked_state *gen6_atoms[] =
 {
-   &brw_check_fallback,
-
    &brw_wm_input_sizes,
    &brw_vs_prog, /* must do before state base address */
    &brw_gs_prog, /* must do before state base address */
@@ -185,8 +181,6 @@ static const struct brw_tracked_state *gen6_atoms[] =
 
 const struct brw_tracked_state *gen7_atoms[] =
 {
-   &brw_check_fallback,
-
    &brw_wm_input_sizes,
    &brw_vs_prog,
    &brw_wm_prog,
@@ -466,8 +460,6 @@ void brw_upload_state(struct brw_context *brw)
    if ((state->mesa | state->cache | state->brw) == 0)
       return;
 
-   brw->intel.Fallback = false; /* boolean, not bitfield */
-
    intel_check_front_buffer_rendering(intel);
 
    if (unlikely(INTEL_DEBUG)) {
@@ -483,9 +475,6 @@ void brw_upload_state(struct brw_context *brw)
 	 const struct brw_tracked_state *atom = brw->atoms[i];
 	 struct brw_state_flags generated;
 
-	 if (brw->intel.Fallback)
-	    break;
-
 	 if (check_state(state, &atom->dirty)) {
 	    atom->emit(brw);
 	 }
@@ -505,9 +494,6 @@ void brw_upload_state(struct brw_context *brw)
       for (i = 0; i < brw->num_atoms; i++) {
 	 const struct brw_tracked_state *atom = brw->atoms[i];
 
-	 if (brw->intel.Fallback)
-	    break;
-
 	 if (check_state(state, &atom->dirty)) {
 	    atom->emit(brw);
 	 }
@@ -526,6 +512,5 @@ void brw_upload_state(struct brw_context *brw)
       }
    }
 
-   if (!brw->intel.Fallback)
-      memset(state, 0, sizeof(*state));
+   memset(state, 0, sizeof(*state));
 }